1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ee73f9a5SJeff Layton #include <linux/iversion.h> 44c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 45c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 489a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 49e5a185c2SLukas Czerner #include <linux/fs_context.h> 50e5a185c2SLukas Czerner #include <linux/fs_parser.h> 51bfff6873SLukas Czerner 523dcf5451SChristoph Hellwig #include "ext4.h" 534a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 543dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 55ac27a0ecSDave Kleikamp #include "xattr.h" 56ac27a0ecSDave Kleikamp #include "acl.h" 573661d286STheodore Ts'o #include "mballoc.h" 580c9ec4beSDarrick J. Wong #include "fsmap.h" 59ac27a0ecSDave Kleikamp 609bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 619bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 629bffad1eSTheodore Ts'o 630b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6459ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 65e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 669f6200bbSTheodore Ts'o 67617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 68ac27a0ecSDave Kleikamp unsigned long journal_devnum); 692adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 702d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 714392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 7411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 75617ba13bSMingming Cao struct ext4_super_block *es); 76617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 77617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 78c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 79c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 88b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 89e6e268cbSLukas Czerner struct super_block *sb); 9085456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9102f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 92cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 93cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 94cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 95cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 961489dffdSChristoph Hellwig static void ext4_kill_sb(struct super_block *sb); 97cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 98ac27a0ecSDave Kleikamp 99e74031fdSJan Kara /* 100e74031fdSJan Kara * Lock ordering 101e74031fdSJan Kara * 102e74031fdSJan Kara * page fault path: 103d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 104d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 105e74031fdSJan Kara * 106e74031fdSJan Kara * buffered write path: 107c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 108e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 109e74031fdSJan Kara * i_data_sem (rw) 110e74031fdSJan Kara * 111e74031fdSJan Kara * truncate: 112d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 113d4f5258eSJan Kara * page lock 114d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1151d39834fSNikolay Borisov * i_data_sem (rw) 116e74031fdSJan Kara * 117e74031fdSJan Kara * direct IO: 118c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1191d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 120e74031fdSJan Kara * 121e74031fdSJan Kara * writepages: 122e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 123e74031fdSJan Kara */ 124e74031fdSJan Kara 12502f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12602f960f8SLukas Czerner .parse_param = ext4_parse_param, 127cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 128cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 129cebe85d5SLukas Czerner .free = ext4_fc_free, 13002f960f8SLukas Czerner }; 13102f960f8SLukas Czerner 13202f960f8SLukas Czerner 133c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1342035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1352035e776STheodore Ts'o .owner = THIS_MODULE, 1362035e776STheodore Ts'o .name = "ext2", 137cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 138cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1391489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 1402035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1412035e776STheodore Ts'o }; 1427f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 143fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1444b41828bSChristoph Hellwig #define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type) 1452035e776STheodore Ts'o #else 1462035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1472035e776STheodore Ts'o #endif 1482035e776STheodore Ts'o 1492035e776STheodore Ts'o 150ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 151ba69f9abSJan Kara .owner = THIS_MODULE, 152ba69f9abSJan Kara .name = "ext3", 153cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 154cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1551489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 156ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 157ba69f9abSJan Kara }; 1587f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 159fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 1604b41828bSChristoph Hellwig #define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type) 161bd81d8eeSLaurent Vivier 162fa491b14Szhangyi (F) 16367c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 164fa491b14Szhangyi (F) bh_end_io_t *end_io) 165fa491b14Szhangyi (F) { 166fb265c9cSTheodore Ts'o /* 167fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 168fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 169fa491b14Szhangyi (F) * recheck the buffer contents. 170fa491b14Szhangyi (F) */ 171fa491b14Szhangyi (F) clear_buffer_verified(bh); 172fa491b14Szhangyi (F) 173fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 174fa491b14Szhangyi (F) get_bh(bh); 1751420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 176fa491b14Szhangyi (F) } 177fa491b14Szhangyi (F) 17867c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 179fa491b14Szhangyi (F) bh_end_io_t *end_io) 180fa491b14Szhangyi (F) { 181fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 184fa491b14Szhangyi (F) unlock_buffer(bh); 185fa491b14Szhangyi (F) return; 186fa491b14Szhangyi (F) } 187fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 188fa491b14Szhangyi (F) } 189fa491b14Szhangyi (F) 19067c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) 191fa491b14Szhangyi (F) { 192fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 193fa491b14Szhangyi (F) 194fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 195fa491b14Szhangyi (F) unlock_buffer(bh); 196fa491b14Szhangyi (F) return 0; 197fa491b14Szhangyi (F) } 198fa491b14Szhangyi (F) 199fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 200fa491b14Szhangyi (F) 201fa491b14Szhangyi (F) wait_on_buffer(bh); 202fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 203fa491b14Szhangyi (F) return 0; 204fa491b14Szhangyi (F) return -EIO; 205fa491b14Szhangyi (F) } 206fa491b14Szhangyi (F) 20767c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) 208fa491b14Szhangyi (F) { 2090b73284cSZhang Yi lock_buffer(bh); 2100b73284cSZhang Yi if (!wait) { 211fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 212fa491b14Szhangyi (F) return 0; 213fa491b14Szhangyi (F) } 2140b73284cSZhang Yi return ext4_read_bh(bh, op_flags, NULL); 215fa491b14Szhangyi (F) } 216fa491b14Szhangyi (F) 217fb265c9cSTheodore Ts'o /* 2188394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 219fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 220fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 221fb265c9cSTheodore Ts'o * return. 222fb265c9cSTheodore Ts'o */ 2238394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 22467c0f556SBart Van Assche sector_t block, 22567c0f556SBart Van Assche blk_opf_t op_flags, gfp_t gfp) 226fb265c9cSTheodore Ts'o { 2272d069c08Szhangyi (F) struct buffer_head *bh; 2282d069c08Szhangyi (F) int ret; 229fb265c9cSTheodore Ts'o 2308394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 231fb265c9cSTheodore Ts'o if (bh == NULL) 232fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 233cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 234fb265c9cSTheodore Ts'o return bh; 2352d069c08Szhangyi (F) 2362d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2372d069c08Szhangyi (F) if (ret) { 238fb265c9cSTheodore Ts'o put_bh(bh); 2392d069c08Szhangyi (F) return ERR_PTR(ret); 2402d069c08Szhangyi (F) } 2412d069c08Szhangyi (F) return bh; 242fb265c9cSTheodore Ts'o } 243fb265c9cSTheodore Ts'o 2448394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 24567c0f556SBart Van Assche blk_opf_t op_flags) 2468394a6abSzhangyi (F) { 2478394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2488394a6abSzhangyi (F) } 2498394a6abSzhangyi (F) 2508394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2518394a6abSzhangyi (F) sector_t block) 2528394a6abSzhangyi (F) { 2538394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2548394a6abSzhangyi (F) } 2558394a6abSzhangyi (F) 2565df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2575df1d412Szhangyi (F) { 2585df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2595df1d412Szhangyi (F) 2605df1d412Szhangyi (F) if (likely(bh)) { 2610b73284cSZhang Yi if (trylock_buffer(bh)) 2620b73284cSZhang Yi ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL); 2635df1d412Szhangyi (F) brelse(bh); 2645df1d412Szhangyi (F) } 265c197855eSStephen Hemminger } 266a9c47317SDarrick J. Wong 267a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2689aa5d32bSDmitry Monakhov struct ext4_super_block *es) 269a9c47317SDarrick J. Wong { 270a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 271a9c47317SDarrick J. Wong return 1; 272a9c47317SDarrick J. Wong 273a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27406db49e6STheodore Ts'o } 275a9c47317SDarrick J. Wong 276bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 277a9c47317SDarrick J. Wong struct ext4_super_block *es) 278a9c47317SDarrick J. Wong { 279a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 280a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 281a9c47317SDarrick J. Wong __u32 csum; 282a9c47317SDarrick J. Wong 283a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 284a9c47317SDarrick J. Wong 285a9c47317SDarrick J. Wong return cpu_to_le32(csum); 286a9c47317SDarrick J. Wong } 287a9c47317SDarrick J. Wong 288a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 289a9c47317SDarrick J. Wong struct ext4_super_block *es) 290a9c47317SDarrick J. Wong { 291a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 292a9c47317SDarrick J. Wong return 1; 293a9c47317SDarrick J. Wong 294a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 295a9c47317SDarrick J. Wong } 296a9c47317SDarrick J. Wong 297a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 298a9c47317SDarrick J. Wong { 29906db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 30006db49e6STheodore Ts'o 3019aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 302a9c47317SDarrick J. Wong return; 303a9c47317SDarrick J. Wong 304a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 305a9c47317SDarrick J. Wong } 306a9c47317SDarrick J. Wong 3078fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3088fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 309bd81d8eeSLaurent Vivier { 3103a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3118fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3128fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 313bd81d8eeSLaurent Vivier } 314bd81d8eeSLaurent Vivier 3158fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3168fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 317bd81d8eeSLaurent Vivier { 3185272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3198fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3208fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 321bd81d8eeSLaurent Vivier } 322bd81d8eeSLaurent Vivier 3238fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3248fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 325bd81d8eeSLaurent Vivier { 3265272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3278fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3288fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 329bd81d8eeSLaurent Vivier } 330bd81d8eeSLaurent Vivier 331021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 332560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 333560671a0SAneesh Kumar K.V { 334560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 335560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 336560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 337560671a0SAneesh Kumar K.V } 338560671a0SAneesh Kumar K.V 339560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 340560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 341560671a0SAneesh Kumar K.V { 342560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 343560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 344560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 345560671a0SAneesh Kumar K.V } 346560671a0SAneesh Kumar K.V 347560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 348560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 349560671a0SAneesh Kumar K.V { 350560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 351560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 352560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 353560671a0SAneesh Kumar K.V } 354560671a0SAneesh Kumar K.V 355560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 356560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 357560671a0SAneesh Kumar K.V { 358560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 359560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 360560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 361560671a0SAneesh Kumar K.V } 362560671a0SAneesh Kumar K.V 3638fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3648fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 365bd81d8eeSLaurent Vivier { 3663a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3678fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3688fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 369bd81d8eeSLaurent Vivier } 370bd81d8eeSLaurent Vivier 3718fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3728fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 373bd81d8eeSLaurent Vivier { 3745272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3758fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3768fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 377bd81d8eeSLaurent Vivier } 378bd81d8eeSLaurent Vivier 3798fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3808fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 381bd81d8eeSLaurent Vivier { 3825272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3838fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3848fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 385bd81d8eeSLaurent Vivier } 386bd81d8eeSLaurent Vivier 387021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 388560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 389560671a0SAneesh Kumar K.V { 390560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 391560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 392560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 393560671a0SAneesh Kumar K.V } 394560671a0SAneesh Kumar K.V 395560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 396560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 397560671a0SAneesh Kumar K.V { 398560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 399560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 400560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 401560671a0SAneesh Kumar K.V } 402560671a0SAneesh Kumar K.V 403560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 404560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 405560671a0SAneesh Kumar K.V { 406560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 407560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 408560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 409560671a0SAneesh Kumar K.V } 410560671a0SAneesh Kumar K.V 411560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 412560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 413560671a0SAneesh Kumar K.V { 414560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 415560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 416560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 417560671a0SAneesh Kumar K.V } 418560671a0SAneesh Kumar K.V 419c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4206a0678a7SArnd Bergmann { 4216a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4226a0678a7SArnd Bergmann 4236a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4246a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4256a0678a7SArnd Bergmann } 4266a0678a7SArnd Bergmann 4276a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4286a0678a7SArnd Bergmann { 4296a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4306a0678a7SArnd Bergmann } 4316a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 432c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 433c92dc856SJan Kara ktime_get_real_seconds()) 4346a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4356a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 436d3d1faf6SCurt Wohlgemuth 437ff0722deSVitaliy Kuznetsov #define EXT4_SB_REFRESH_INTERVAL_SEC (3600) /* seconds (1 hour) */ 438ff0722deSVitaliy Kuznetsov #define EXT4_SB_REFRESH_INTERVAL_KB (16384) /* kilobytes (16MB) */ 439ff0722deSVitaliy Kuznetsov 440ff0722deSVitaliy Kuznetsov /* 441ff0722deSVitaliy Kuznetsov * The ext4_maybe_update_superblock() function checks and updates the 442ff0722deSVitaliy Kuznetsov * superblock if needed. 443ff0722deSVitaliy Kuznetsov * 444ff0722deSVitaliy Kuznetsov * This function is designed to update the on-disk superblock only under 445ff0722deSVitaliy Kuznetsov * certain conditions to prevent excessive disk writes and unnecessary 446ff0722deSVitaliy Kuznetsov * waking of the disk from sleep. The superblock will be updated if: 447ff0722deSVitaliy Kuznetsov * 1. More than an hour has passed since the last superblock update, and 448ff0722deSVitaliy Kuznetsov * 2. More than 16MB have been written since the last superblock update. 449ff0722deSVitaliy Kuznetsov * 450ff0722deSVitaliy Kuznetsov * @sb: The superblock 451ff0722deSVitaliy Kuznetsov */ 452ff0722deSVitaliy Kuznetsov static void ext4_maybe_update_superblock(struct super_block *sb) 453ff0722deSVitaliy Kuznetsov { 454ff0722deSVitaliy Kuznetsov struct ext4_sb_info *sbi = EXT4_SB(sb); 455ff0722deSVitaliy Kuznetsov struct ext4_super_block *es = sbi->s_es; 456ff0722deSVitaliy Kuznetsov journal_t *journal = sbi->s_journal; 457ff0722deSVitaliy Kuznetsov time64_t now; 458ff0722deSVitaliy Kuznetsov __u64 last_update; 459ff0722deSVitaliy Kuznetsov __u64 lifetime_write_kbytes; 460ff0722deSVitaliy Kuznetsov __u64 diff_size; 461ff0722deSVitaliy Kuznetsov 462ff0722deSVitaliy Kuznetsov if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) || 463ff0722deSVitaliy Kuznetsov !journal || (journal->j_flags & JBD2_UNMOUNT)) 464ff0722deSVitaliy Kuznetsov return; 465ff0722deSVitaliy Kuznetsov 466ff0722deSVitaliy Kuznetsov now = ktime_get_real_seconds(); 467ff0722deSVitaliy Kuznetsov last_update = ext4_get_tstamp(es, s_wtime); 468ff0722deSVitaliy Kuznetsov 469ff0722deSVitaliy Kuznetsov if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC)) 470ff0722deSVitaliy Kuznetsov return; 471ff0722deSVitaliy Kuznetsov 472ff0722deSVitaliy Kuznetsov lifetime_write_kbytes = sbi->s_kbytes_written + 473ff0722deSVitaliy Kuznetsov ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 474ff0722deSVitaliy Kuznetsov sbi->s_sectors_written_start) >> 1); 475ff0722deSVitaliy Kuznetsov 476ff0722deSVitaliy Kuznetsov /* Get the number of kilobytes not written to disk to account 477ff0722deSVitaliy Kuznetsov * for statistics and compare with a multiple of 16 MB. This 478ff0722deSVitaliy Kuznetsov * is used to determine when the next superblock commit should 479ff0722deSVitaliy Kuznetsov * occur (i.e. not more often than once per 16MB if there was 480ff0722deSVitaliy Kuznetsov * less written in an hour). 481ff0722deSVitaliy Kuznetsov */ 482ff0722deSVitaliy Kuznetsov diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written); 483ff0722deSVitaliy Kuznetsov 484ff0722deSVitaliy Kuznetsov if (diff_size > EXT4_SB_REFRESH_INTERVAL_KB) 485bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 486ff0722deSVitaliy Kuznetsov } 487ff0722deSVitaliy Kuznetsov 488bdfe0cbdSTheodore Ts'o /* 489bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 490bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 491bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 492bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 493bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 494bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 495bdfe0cbdSTheodore Ts'o */ 496bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 497bdfe0cbdSTheodore Ts'o { 498bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 499bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 500bdfe0cbdSTheodore Ts'o 501bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 502bdfe0cbdSTheodore Ts'o } 503bdfe0cbdSTheodore Ts'o 50418aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 50518aadd47SBobi Jam { 50618aadd47SBobi Jam struct super_block *sb = journal->j_private; 50718aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 50818aadd47SBobi Jam int error = is_journal_aborted(journal); 5095d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 51018aadd47SBobi Jam 5115d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 512a0154344SDaeho Jeong 513a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 514ff0722deSVitaliy Kuznetsov ext4_maybe_update_superblock(sb); 515a0154344SDaeho Jeong 51618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 5175d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 5185d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 5195d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 52018aadd47SBobi Jam list_del_init(&jce->jce_list); 52118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 52218aadd47SBobi Jam jce->jce_func(sb, jce, error); 52318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 52418aadd47SBobi Jam } 52518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 52618aadd47SBobi Jam } 5271c13d5c0STheodore Ts'o 528afb585a9SMauricio Faria de Oliveira /* 529afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 530afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 531afb585a9SMauricio Faria de Oliveira * 532afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 533afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 534afb585a9SMauricio Faria de Oliveira * to write protect the pages. 535afb585a9SMauricio Faria de Oliveira * 536afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 537afb585a9SMauricio Faria de Oliveira */ 538d585bdbeSMatthew Wilcox (Oracle) static int ext4_journalled_writepage_callback(struct folio *folio, 539afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 540afb585a9SMauricio Faria de Oliveira void *data) 541afb585a9SMauricio Faria de Oliveira { 542afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 543afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 544afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 545afb585a9SMauricio Faria de Oliveira 546d585bdbeSMatthew Wilcox (Oracle) bh = head = folio_buffers(folio); 547afb585a9SMauricio Faria de Oliveira do { 548afb585a9SMauricio Faria de Oliveira /* 549afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 550afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 551afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 552afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 553afb585a9SMauricio Faria de Oliveira * properly. 554afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 555afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 556afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 557afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 558afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 559afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 560afb585a9SMauricio Faria de Oliveira */ 561afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 562afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 563afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 564afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 565d585bdbeSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 566afb585a9SMauricio Faria de Oliveira goto out; 567afb585a9SMauricio Faria de Oliveira } 568afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 569afb585a9SMauricio Faria de Oliveira 570afb585a9SMauricio Faria de Oliveira out: 571afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 572afb585a9SMauricio Faria de Oliveira } 573afb585a9SMauricio Faria de Oliveira 574afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 575afb585a9SMauricio Faria de Oliveira { 576afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 577afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 578afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 579afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 580afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 581afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 582afb585a9SMauricio Faria de Oliveira }; 583afb585a9SMauricio Faria de Oliveira 584afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 585afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 586afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 587afb585a9SMauricio Faria de Oliveira } 588afb585a9SMauricio Faria de Oliveira 589afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 590afb585a9SMauricio Faria de Oliveira { 591afb585a9SMauricio Faria de Oliveira int ret; 592afb585a9SMauricio Faria de Oliveira 593afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 594afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 595afb585a9SMauricio Faria de Oliveira else 59659205c8dSJan Kara ret = ext4_normal_submit_inode_data_buffers(jinode); 597afb585a9SMauricio Faria de Oliveira return ret; 598afb585a9SMauricio Faria de Oliveira } 599afb585a9SMauricio Faria de Oliveira 600afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 601afb585a9SMauricio Faria de Oliveira { 602afb585a9SMauricio Faria de Oliveira int ret = 0; 603afb585a9SMauricio Faria de Oliveira 604afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 605afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 606afb585a9SMauricio Faria de Oliveira 607afb585a9SMauricio Faria de Oliveira return ret; 608afb585a9SMauricio Faria de Oliveira } 609afb585a9SMauricio Faria de Oliveira 6101dc1097fSJan Kara static bool system_going_down(void) 6111dc1097fSJan Kara { 6121dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 6131dc1097fSJan Kara || system_state == SYSTEM_RESTART; 6141dc1097fSJan Kara } 6151dc1097fSJan Kara 61602a7780eSJan Kara struct ext4_err_translation { 61702a7780eSJan Kara int code; 61802a7780eSJan Kara int errno; 61902a7780eSJan Kara }; 62002a7780eSJan Kara 62102a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 62202a7780eSJan Kara 62302a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 62402a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 62502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 62602a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 62702a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 62802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 62902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 63002a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 63102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 63202a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 63302a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 63402a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 63502a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 63602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 63702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 63802a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 63902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 64002a7780eSJan Kara }; 64102a7780eSJan Kara 64202a7780eSJan Kara static int ext4_errno_to_code(int errno) 64302a7780eSJan Kara { 64402a7780eSJan Kara int i; 64502a7780eSJan Kara 64602a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 64702a7780eSJan Kara if (err_translation[i].errno == errno) 64802a7780eSJan Kara return err_translation[i].code; 64902a7780eSJan Kara return EXT4_ERR_UNKNOWN; 65002a7780eSJan Kara } 65102a7780eSJan Kara 6522d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 65340676623SJan Kara __u32 ino, __u64 block, 65440676623SJan Kara const char *func, unsigned int line) 65540676623SJan Kara { 656c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 65740676623SJan Kara 65802a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 65902a7780eSJan Kara if (error == 0) 66002a7780eSJan Kara error = EFSCORRUPTED; 661c92dc856SJan Kara 662c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 663c92dc856SJan Kara sbi->s_add_error_count++; 664c92dc856SJan Kara sbi->s_last_error_code = error; 665c92dc856SJan Kara sbi->s_last_error_line = line; 666c92dc856SJan Kara sbi->s_last_error_ino = ino; 667c92dc856SJan Kara sbi->s_last_error_block = block; 668c92dc856SJan Kara sbi->s_last_error_func = func; 669c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 670c92dc856SJan Kara if (!sbi->s_first_error_time) { 671c92dc856SJan Kara sbi->s_first_error_code = error; 672c92dc856SJan Kara sbi->s_first_error_line = line; 673c92dc856SJan Kara sbi->s_first_error_ino = ino; 674c92dc856SJan Kara sbi->s_first_error_block = block; 675c92dc856SJan Kara sbi->s_first_error_func = func; 676c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 67740676623SJan Kara } 678c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 67940676623SJan Kara } 68040676623SJan Kara 681ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 682ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 683ac27a0ecSDave Kleikamp * 684ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 685617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 686ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 687ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 688ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 689ac27a0ecSDave Kleikamp * write out the superblock safely. 690ac27a0ecSDave Kleikamp * 691dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 692d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 693ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 694014c9caaSJan Kara * 695014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 696014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 697014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 698014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 699014c9caaSJan Kara * at a critical moment in log management. 700ac27a0ecSDave Kleikamp */ 701e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 702e789ca0cSJan Kara __u32 ino, __u64 block, 703e789ca0cSJan Kara const char *func, unsigned int line) 704ac27a0ecSDave Kleikamp { 705b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 7062d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 707b08070ecSJan Kara 708e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 709327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 710327eaf73STheodore Ts'o WARN_ON_ONCE(1); 711327eaf73STheodore Ts'o 7122d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 71395257987SJan Kara set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags); 714ac27a0ecSDave Kleikamp if (journal) 715dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 7162d01ddc8SJan Kara } 7172d01ddc8SJan Kara 7182d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 7192d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 7202d01ddc8SJan Kara /* 7212d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 7222d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 7232d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 7242d01ddc8SJan Kara * defer superblock flushing to a workqueue. 7252d01ddc8SJan Kara */ 726bb9464e0Syangerkun if (continue_fs && journal) 727bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 7282d01ddc8SJan Kara else 7292d01ddc8SJan Kara ext4_commit_super(sb); 7302d01ddc8SJan Kara } 7312d01ddc8SJan Kara 7321dc1097fSJan Kara /* 7331dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 7341dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 7351dc1097fSJan Kara * disabled. 7361dc1097fSJan Kara */ 737014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 738617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 739ac27a0ecSDave Kleikamp sb->s_id); 740ac27a0ecSDave Kleikamp } 741ac2f7ca5SYe Bin 742ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 743ac2f7ca5SYe Bin return; 744ac2f7ca5SYe Bin 745014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 746014c9caaSJan Kara /* 747014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 748014c9caaSJan Kara * ->s_flags update 749014c9caaSJan Kara */ 750014c9caaSJan Kara smp_wmb(); 751014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7524327ba52SDaeho Jeong } 753ac27a0ecSDave Kleikamp 754bb15cea2STheodore Ts'o static void update_super_work(struct work_struct *work) 755c92dc856SJan Kara { 756c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 757bb15cea2STheodore Ts'o s_sb_upd_work); 7582d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7592d01ddc8SJan Kara handle_t *handle; 760c92dc856SJan Kara 7612d01ddc8SJan Kara /* 7622d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7632d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7642d01ddc8SJan Kara * updates. 7652d01ddc8SJan Kara * 7662d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7672d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7682d01ddc8SJan Kara */ 7692d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 770558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 771*ee6a12d0STheodore Ts'o bool call_notify_err = false; 772*ee6a12d0STheodore Ts'o 7732d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7742d01ddc8SJan Kara if (IS_ERR(handle)) 7752d01ddc8SJan Kara goto write_directly; 776558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7772d01ddc8SJan Kara jbd2_journal_stop(handle); 7782d01ddc8SJan Kara goto write_directly; 7792d01ddc8SJan Kara } 780ff0722deSVitaliy Kuznetsov 781ff0722deSVitaliy Kuznetsov if (sbi->s_add_error_count > 0) 782ff0722deSVitaliy Kuznetsov call_notify_err = true; 783ff0722deSVitaliy Kuznetsov 7842d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 785558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 786558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 787558d6450SYe Bin "superblock detected"); 788558d6450SYe Bin clear_buffer_write_io_error(sbh); 789558d6450SYe Bin set_buffer_uptodate(sbh); 790558d6450SYe Bin } 791558d6450SYe Bin 792558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7932d01ddc8SJan Kara jbd2_journal_stop(handle); 7942d01ddc8SJan Kara goto write_directly; 7952d01ddc8SJan Kara } 7962d01ddc8SJan Kara jbd2_journal_stop(handle); 797ff0722deSVitaliy Kuznetsov 798ff0722deSVitaliy Kuznetsov if (call_notify_err) 799d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 800ff0722deSVitaliy Kuznetsov 8012d01ddc8SJan Kara return; 8022d01ddc8SJan Kara } 8032d01ddc8SJan Kara write_directly: 8042d01ddc8SJan Kara /* 8052d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 8062d01ddc8SJan Kara * out and hope for the best. 8072d01ddc8SJan Kara */ 8084392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 809d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 810ac27a0ecSDave Kleikamp } 811ac27a0ecSDave Kleikamp 812efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 813efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 814efbed4dcSTheodore Ts'o "EXT4-fs error") 815efbed4dcSTheodore Ts'o 81612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 817014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 81854d3adbcSTheodore Ts'o const char *fmt, ...) 819ac27a0ecSDave Kleikamp { 8200ff2ea7dSJoe Perches struct va_format vaf; 821ac27a0ecSDave Kleikamp va_list args; 822ac27a0ecSDave Kleikamp 823eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 8240db1ff22STheodore Ts'o return; 8250db1ff22STheodore Ts'o 826ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 827efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 828ac27a0ecSDave Kleikamp va_start(args, fmt); 8290ff2ea7dSJoe Perches vaf.fmt = fmt; 8300ff2ea7dSJoe Perches vaf.va = &args; 831efbed4dcSTheodore Ts'o printk(KERN_CRIT 832efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 8330ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 834ac27a0ecSDave Kleikamp va_end(args); 835efbed4dcSTheodore Ts'o } 8369a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 8379a089b21SGabriel Krisman Bertazi 838e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 839ac27a0ecSDave Kleikamp } 840ac27a0ecSDave Kleikamp 841e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 84254d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 843273df556SFrank Mayhar const char *fmt, ...) 844273df556SFrank Mayhar { 845273df556SFrank Mayhar va_list args; 846f7c21177STheodore Ts'o struct va_format vaf; 847273df556SFrank Mayhar 848eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(inode->i_sb))) 8490db1ff22STheodore Ts'o return; 8500db1ff22STheodore Ts'o 851ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 852efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 853273df556SFrank Mayhar va_start(args, fmt); 854f7c21177STheodore Ts'o vaf.fmt = fmt; 855f7c21177STheodore Ts'o vaf.va = &args; 856c398eda0STheodore Ts'o if (block) 857d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 858d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 859d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 860d9ee81daSJoe Perches block, current->comm, &vaf); 861d9ee81daSJoe Perches else 862d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 863d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 864d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 865d9ee81daSJoe Perches current->comm, &vaf); 866273df556SFrank Mayhar va_end(args); 867efbed4dcSTheodore Ts'o } 8689a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8699a089b21SGabriel Krisman Bertazi 870e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 87154d3adbcSTheodore Ts'o function, line); 872273df556SFrank Mayhar } 873273df556SFrank Mayhar 874e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 875f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 876f7c21177STheodore Ts'o const char *fmt, ...) 877273df556SFrank Mayhar { 878273df556SFrank Mayhar va_list args; 879f7c21177STheodore Ts'o struct va_format vaf; 880496ad9aaSAl Viro struct inode *inode = file_inode(file); 881273df556SFrank Mayhar char pathname[80], *path; 882273df556SFrank Mayhar 883eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(inode->i_sb))) 8840db1ff22STheodore Ts'o return; 8850db1ff22STheodore Ts'o 886ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 887efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8889bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 889f9a62d09SDan Carpenter if (IS_ERR(path)) 890273df556SFrank Mayhar path = "(unknown)"; 891f7c21177STheodore Ts'o va_start(args, fmt); 892f7c21177STheodore Ts'o vaf.fmt = fmt; 893f7c21177STheodore Ts'o vaf.va = &args; 894d9ee81daSJoe Perches if (block) 895d9ee81daSJoe Perches printk(KERN_CRIT 896d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 897d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 898d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 899d9ee81daSJoe Perches block, current->comm, path, &vaf); 900d9ee81daSJoe Perches else 901d9ee81daSJoe Perches printk(KERN_CRIT 902d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 903d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 904d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 905d9ee81daSJoe Perches current->comm, path, &vaf); 906273df556SFrank Mayhar va_end(args); 907efbed4dcSTheodore Ts'o } 9089a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 9099a089b21SGabriel Krisman Bertazi 910e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 91154d3adbcSTheodore Ts'o function, line); 912273df556SFrank Mayhar } 913273df556SFrank Mayhar 914722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 915ac27a0ecSDave Kleikamp char nbuf[16]) 916ac27a0ecSDave Kleikamp { 917ac27a0ecSDave Kleikamp char *errstr = NULL; 918ac27a0ecSDave Kleikamp 919ac27a0ecSDave Kleikamp switch (errno) { 9206a797d27SDarrick J. Wong case -EFSCORRUPTED: 9216a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 9226a797d27SDarrick J. Wong break; 9236a797d27SDarrick J. Wong case -EFSBADCRC: 9246a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 9256a797d27SDarrick J. Wong break; 926ac27a0ecSDave Kleikamp case -EIO: 927ac27a0ecSDave Kleikamp errstr = "IO failure"; 928ac27a0ecSDave Kleikamp break; 929ac27a0ecSDave Kleikamp case -ENOMEM: 930ac27a0ecSDave Kleikamp errstr = "Out of memory"; 931ac27a0ecSDave Kleikamp break; 932ac27a0ecSDave Kleikamp case -EROFS: 93378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 93478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 935ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 936ac27a0ecSDave Kleikamp else 937ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 938ac27a0ecSDave Kleikamp break; 939ac27a0ecSDave Kleikamp default: 940ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 941ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 942ac27a0ecSDave Kleikamp * NULL. */ 943ac27a0ecSDave Kleikamp if (nbuf) { 944ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 945ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 946ac27a0ecSDave Kleikamp errstr = nbuf; 947ac27a0ecSDave Kleikamp } 948ac27a0ecSDave Kleikamp break; 949ac27a0ecSDave Kleikamp } 950ac27a0ecSDave Kleikamp 951ac27a0ecSDave Kleikamp return errstr; 952ac27a0ecSDave Kleikamp } 953ac27a0ecSDave Kleikamp 954617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 955ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 956ac27a0ecSDave Kleikamp 957c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 958c398eda0STheodore Ts'o unsigned int line, int errno) 959ac27a0ecSDave Kleikamp { 960ac27a0ecSDave Kleikamp char nbuf[16]; 961ac27a0ecSDave Kleikamp const char *errstr; 962ac27a0ecSDave Kleikamp 963eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 9640db1ff22STheodore Ts'o return; 9650db1ff22STheodore Ts'o 966ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 967ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 968ac27a0ecSDave Kleikamp * an error. */ 969bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 970ac27a0ecSDave Kleikamp return; 971ac27a0ecSDave Kleikamp 972efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 973617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 974c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 975c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 976efbed4dcSTheodore Ts'o } 9779a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 978ac27a0ecSDave Kleikamp 979e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 980ac27a0ecSDave Kleikamp } 981ac27a0ecSDave Kleikamp 982e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 983e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 984b31e1552SEric Sandeen { 9850ff2ea7dSJoe Perches struct va_format vaf; 986b31e1552SEric Sandeen va_list args; 987b31e1552SEric Sandeen 988da812f61SLukas Czerner if (sb) { 9891cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 990da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 991da812f61SLukas Czerner "EXT4-fs")) 992efbed4dcSTheodore Ts'o return; 993da812f61SLukas Czerner } 994efbed4dcSTheodore Ts'o 995b31e1552SEric Sandeen va_start(args, fmt); 9960ff2ea7dSJoe Perches vaf.fmt = fmt; 9970ff2ea7dSJoe Perches vaf.va = &args; 998da812f61SLukas Czerner if (sb) 9990ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 1000da812f61SLukas Czerner else 1001da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 1002b31e1552SEric Sandeen va_end(args); 1003b31e1552SEric Sandeen } 1004b31e1552SEric Sandeen 10051cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 10061cf006edSDmitry Monakhov { 10071cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 10081cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 10091cf006edSDmitry Monakhov "EXT4-fs warning"); 10101cf006edSDmitry Monakhov } 1011b03a2f7eSAndreas Dilger 101212062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 1013c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 1014ac27a0ecSDave Kleikamp { 10150ff2ea7dSJoe Perches struct va_format vaf; 1016ac27a0ecSDave Kleikamp va_list args; 1017ac27a0ecSDave Kleikamp 1018b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 1019efbed4dcSTheodore Ts'o return; 1020efbed4dcSTheodore Ts'o 1021ac27a0ecSDave Kleikamp va_start(args, fmt); 10220ff2ea7dSJoe Perches vaf.fmt = fmt; 10230ff2ea7dSJoe Perches vaf.va = &args; 10240ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 10250ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 1026ac27a0ecSDave Kleikamp va_end(args); 1027ac27a0ecSDave Kleikamp } 1028ac27a0ecSDave Kleikamp 1029b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 1030b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 1031b03a2f7eSAndreas Dilger { 1032b03a2f7eSAndreas Dilger struct va_format vaf; 1033b03a2f7eSAndreas Dilger va_list args; 1034b03a2f7eSAndreas Dilger 1035b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 1036b03a2f7eSAndreas Dilger return; 1037b03a2f7eSAndreas Dilger 1038b03a2f7eSAndreas Dilger va_start(args, fmt); 1039b03a2f7eSAndreas Dilger vaf.fmt = fmt; 1040b03a2f7eSAndreas Dilger vaf.va = &args; 1041b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 1042b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 1043b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 1044b03a2f7eSAndreas Dilger va_end(args); 1045b03a2f7eSAndreas Dilger } 1046b03a2f7eSAndreas Dilger 1047e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 1048e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 1049e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 1050e29136f8STheodore Ts'o const char *fmt, ...) 10515d1b1b3fSAneesh Kumar K.V __releases(bitlock) 10525d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 10535d1b1b3fSAneesh Kumar K.V { 10540ff2ea7dSJoe Perches struct va_format vaf; 10555d1b1b3fSAneesh Kumar K.V va_list args; 10565d1b1b3fSAneesh Kumar K.V 1057eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 10580db1ff22STheodore Ts'o return; 10590db1ff22STheodore Ts'o 1060ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1061efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10625d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10630ff2ea7dSJoe Perches vaf.fmt = fmt; 10640ff2ea7dSJoe Perches vaf.va = &args; 106521149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1066e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1067e29136f8STheodore Ts'o if (ino) 10680ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1069e29136f8STheodore Ts'o if (block) 1070efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1071efbed4dcSTheodore Ts'o (unsigned long long) block); 10720ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10735d1b1b3fSAneesh Kumar K.V va_end(args); 1074efbed4dcSTheodore Ts'o } 10755d1b1b3fSAneesh Kumar K.V 1076c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1077327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1078327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1079e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10802d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10812d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10822d01ddc8SJan Kara line); 1083bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 10842d01ddc8SJan Kara } 10855d1b1b3fSAneesh Kumar K.V return; 10865d1b1b3fSAneesh Kumar K.V } 10875d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1088e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10895d1b1b3fSAneesh Kumar K.V /* 10905d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10915d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10925d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10935d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10945d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 109525985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10965d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10975d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10985d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10995d1b1b3fSAneesh Kumar K.V */ 11005d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 11015d1b1b3fSAneesh Kumar K.V return; 11025d1b1b3fSAneesh Kumar K.V } 11035d1b1b3fSAneesh Kumar K.V 1104db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1105db79e6d1SWang Shilong ext4_group_t group, 1106db79e6d1SWang Shilong unsigned int flags) 1107db79e6d1SWang Shilong { 1108db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1109db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1110db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 11119af0b3d1SWang Shilong int ret; 1112db79e6d1SWang Shilong 11135354b2afSTheodore Ts'o if (!grp || !gdp) 11145354b2afSTheodore Ts'o return; 11159af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 11169af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 11179af0b3d1SWang Shilong &grp->bb_state); 11189af0b3d1SWang Shilong if (!ret) 1119db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1120db79e6d1SWang Shilong grp->bb_free); 1121db79e6d1SWang Shilong } 1122db79e6d1SWang Shilong 11239af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 11249af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 11259af0b3d1SWang Shilong &grp->bb_state); 11269af0b3d1SWang Shilong if (!ret && gdp) { 1127db79e6d1SWang Shilong int count; 1128db79e6d1SWang Shilong 1129db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1130db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1131db79e6d1SWang Shilong count); 1132db79e6d1SWang Shilong } 1133db79e6d1SWang Shilong } 1134db79e6d1SWang Shilong } 1135db79e6d1SWang Shilong 1136617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1137ac27a0ecSDave Kleikamp { 1138617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1139ac27a0ecSDave Kleikamp 1140617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1141ac27a0ecSDave Kleikamp return; 1142ac27a0ecSDave Kleikamp 114312062dddSEric Sandeen ext4_warning(sb, 1144ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1145ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1146617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1147ac27a0ecSDave Kleikamp 1148617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1149617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1150617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1151ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1152ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1153ac27a0ecSDave Kleikamp 1154ac27a0ecSDave Kleikamp /* 1155ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1156ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1157ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1158ac27a0ecSDave Kleikamp */ 1159ac27a0ecSDave Kleikamp } 1160ac27a0ecSDave Kleikamp 1161ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1162ac27a0ecSDave Kleikamp { 1163617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1164ac27a0ecSDave Kleikamp } 1165ac27a0ecSDave Kleikamp 1166617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1167ac27a0ecSDave Kleikamp { 1168ac27a0ecSDave Kleikamp struct list_head *l; 1169ac27a0ecSDave Kleikamp 1170b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1171ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1172ac27a0ecSDave Kleikamp 1173ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1174ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1175ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1176ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1177ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1178ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1179ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1180ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1181ac27a0ecSDave Kleikamp } 1182ac27a0ecSDave Kleikamp } 1183ac27a0ecSDave Kleikamp 1184957153fcSJan Kara #ifdef CONFIG_QUOTA 1185957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1186957153fcSJan Kara 1187f3c1c42eSBaokun Li static inline void ext4_quotas_off(struct super_block *sb, int type) 1188957153fcSJan Kara { 1189f3c1c42eSBaokun Li BUG_ON(type > EXT4_MAXQUOTAS); 1190957153fcSJan Kara 1191957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1192f3c1c42eSBaokun Li for (type--; type >= 0; type--) 1193957153fcSJan Kara ext4_quota_off(sb, type); 1194957153fcSJan Kara } 119533458eabSTheodore Ts'o 119633458eabSTheodore Ts'o /* 119733458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 119833458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 119933458eabSTheodore Ts'o */ 120033458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 120133458eabSTheodore Ts'o struct ext4_sb_info *sbi, 120233458eabSTheodore Ts'o int type) 120333458eabSTheodore Ts'o { 120433458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 120533458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 120633458eabSTheodore Ts'o } 1207957153fcSJan Kara #else 1208f3c1c42eSBaokun Li static inline void ext4_quotas_off(struct super_block *sb, int type) 1209957153fcSJan Kara { 1210957153fcSJan Kara } 1211957153fcSJan Kara #endif 1212957153fcSJan Kara 12131f79467cSJason Yan static int ext4_percpu_param_init(struct ext4_sb_info *sbi) 12141f79467cSJason Yan { 12151f79467cSJason Yan ext4_fsblk_t block; 12161f79467cSJason Yan int err; 12171f79467cSJason Yan 12181f79467cSJason Yan block = ext4_count_free_clusters(sbi->s_sb); 12191f79467cSJason Yan ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); 12201f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 12211f79467cSJason Yan GFP_KERNEL); 12221f79467cSJason Yan if (!err) { 12231f79467cSJason Yan unsigned long freei = ext4_count_free_inodes(sbi->s_sb); 12241f79467cSJason Yan sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 12251f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 12261f79467cSJason Yan GFP_KERNEL); 12271f79467cSJason Yan } 12281f79467cSJason Yan if (!err) 12291f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirs_counter, 12301f79467cSJason Yan ext4_count_dirs(sbi->s_sb), GFP_KERNEL); 12311f79467cSJason Yan if (!err) 12321f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 12331f79467cSJason Yan GFP_KERNEL); 12341f79467cSJason Yan if (!err) 12351f79467cSJason Yan err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 12361f79467cSJason Yan GFP_KERNEL); 12371f79467cSJason Yan if (!err) 12381f79467cSJason Yan err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 12391f79467cSJason Yan 12401f79467cSJason Yan if (err) 12411f79467cSJason Yan ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory"); 12421f79467cSJason Yan 12431f79467cSJason Yan return err; 12441f79467cSJason Yan } 12451f79467cSJason Yan 12461f79467cSJason Yan static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi) 12471f79467cSJason Yan { 12481f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeclusters_counter); 12491f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeinodes_counter); 12501f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirs_counter); 12511f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 12521f79467cSJason Yan percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 12531f79467cSJason Yan percpu_free_rwsem(&sbi->s_writepages_rwsem); 12541f79467cSJason Yan } 12551f79467cSJason Yan 12566ef68498SJason Yan static void ext4_group_desc_free(struct ext4_sb_info *sbi) 12576ef68498SJason Yan { 12586ef68498SJason Yan struct buffer_head **group_desc; 12596ef68498SJason Yan int i; 12606ef68498SJason Yan 12616ef68498SJason Yan rcu_read_lock(); 12626ef68498SJason Yan group_desc = rcu_dereference(sbi->s_group_desc); 12636ef68498SJason Yan for (i = 0; i < sbi->s_gdb_count; i++) 12646ef68498SJason Yan brelse(group_desc[i]); 12656ef68498SJason Yan kvfree(group_desc); 12666ef68498SJason Yan rcu_read_unlock(); 12676ef68498SJason Yan } 12686ef68498SJason Yan 1269dcbf8758SJason Yan static void ext4_flex_groups_free(struct ext4_sb_info *sbi) 1270dcbf8758SJason Yan { 1271dcbf8758SJason Yan struct flex_groups **flex_groups; 1272dcbf8758SJason Yan int i; 1273dcbf8758SJason Yan 1274dcbf8758SJason Yan rcu_read_lock(); 1275dcbf8758SJason Yan flex_groups = rcu_dereference(sbi->s_flex_groups); 1276dcbf8758SJason Yan if (flex_groups) { 1277dcbf8758SJason Yan for (i = 0; i < sbi->s_flex_groups_allocated; i++) 1278dcbf8758SJason Yan kvfree(flex_groups[i]); 1279dcbf8758SJason Yan kvfree(flex_groups); 1280dcbf8758SJason Yan } 1281dcbf8758SJason Yan rcu_read_unlock(); 1282dcbf8758SJason Yan } 1283dcbf8758SJason Yan 1284617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1285ac27a0ecSDave Kleikamp { 1286617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1287617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 128897abd7d4STheodore Ts'o int aborted = 0; 1289856dd6c5SNathan Chancellor int err; 1290ac27a0ecSDave Kleikamp 1291b98535d0SYe Bin /* 1292b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1293b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1294b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1295bb15cea2STheodore Ts'o * Unregister sysfs before flush sbi->s_sb_upd_work. 1296b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1297b98535d0SYe Bin * read metadata verify failed then will queue error work. 1298bb15cea2STheodore Ts'o * update_super_work will call start_this_handle may trigger 1299b98535d0SYe Bin * BUG_ON. 1300b98535d0SYe Bin */ 1301b98535d0SYe Bin ext4_unregister_sysfs(sb); 1302b98535d0SYe Bin 13034808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 1304bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", 1305bb0fbc78SLukas Czerner &sb->s_uuid); 13064808cb5bSZhang Yi 1307857ac889SLukas Czerner ext4_unregister_li_request(sb); 1308f3c1c42eSBaokun Li ext4_quotas_off(sb, EXT4_MAXQUOTAS); 1309e0ccfd95SChristoph Hellwig 1310bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 13112e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 131202f310fcSJan Kara ext4_release_orphan_info(sb); 13134c0425ffSMingming Cao 13140390131bSFrank Mayhar if (sbi->s_journal) { 131597abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1316ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 131747b4a50bSJan Kara sbi->s_journal = NULL; 1318878520acSTheodore Ts'o if ((err < 0) && !aborted) { 131954d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 13200390131bSFrank Mayhar } 1321878520acSTheodore Ts'o } 1322d4edac31SJosef Bacik 1323d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 1324292a089dSSteven Rostedt (Google) timer_shutdown_sync(&sbi->s_err_report); 1325d4edac31SJosef Bacik ext4_release_system_zone(sb); 1326d4edac31SJosef Bacik ext4_mb_release(sb); 1327d4edac31SJosef Bacik ext4_ext_release(sb); 1328d4edac31SJosef Bacik 1329bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1330e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 133102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1332ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1333ac27a0ecSDave Kleikamp } 1334bc98a42cSDavid Howells if (!sb_rdonly(sb)) 13354392fbc4SJan Kara ext4_commit_super(sb); 1336a8e25a83SArtem Bityutskiy 13376ef68498SJason Yan ext4_group_desc_free(sbi); 1338dcbf8758SJason Yan ext4_flex_groups_free(sbi); 13391f79467cSJason Yan ext4_percpu_param_destroy(sbi); 1340ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1341856dd6c5SNathan Chancellor for (int i = 0; i < EXT4_MAXQUOTAS; i++) 134233458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1343ac27a0ecSDave Kleikamp #endif 1344ac27a0ecSDave Kleikamp 1345ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1346ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1347ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1348ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1349ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1350ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1351837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1352ac27a0ecSDave Kleikamp 135389d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1354f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 135593e92cfcSZhihao Cheng if (sbi->s_journal_bdev) { 13561489dffdSChristoph Hellwig /* 13571489dffdSChristoph Hellwig * Invalidate the journal device's buffers. We don't want them 13581489dffdSChristoph Hellwig * floating about in memory - the physical journal device may 13591489dffdSChristoph Hellwig * hotswapped, and it breaks the `ro-after' testing code. 13601489dffdSChristoph Hellwig */ 1361ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 13621489dffdSChristoph Hellwig invalidate_bdev(sbi->s_journal_bdev); 1363ac27a0ecSDave Kleikamp } 136450c15df6SChengguang Xu 1365dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1366dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 136750c15df6SChengguang Xu 136847387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 136947387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 137050c15df6SChengguang Xu 1371618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1372618f0031SPavel Skripkin 13739060dd2cSEric Sandeen brelse(sbi->s_sbh); 1374ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13753197ebdbSTheodore Ts'o /* 13763197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13773197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13783197ebdbSTheodore Ts'o */ 13793197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13803197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13810441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13820441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1383705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13848012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1385ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13865298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1387f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1388c83ad55eSGabriel Krisman Bertazi #endif 1389ac27a0ecSDave Kleikamp kfree(sbi); 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp 1392e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1393ac27a0ecSDave Kleikamp 1394ac27a0ecSDave Kleikamp /* 1395ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1396ac27a0ecSDave Kleikamp */ 1397617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1398ac27a0ecSDave Kleikamp { 1399617ba13bSMingming Cao struct ext4_inode_info *ei; 1400ac27a0ecSDave Kleikamp 1401fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1402ac27a0ecSDave Kleikamp if (!ei) 1403ac27a0ecSDave Kleikamp return NULL; 14040b8e58a1SAndreas Dilger 1405ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 14067ea71af9SYe Bin ei->i_flags = 0; 1407202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 140838727786SOjaswin Mujoo ei->i_prealloc_node = RB_ROOT; 140927bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 141038727786SOjaswin Mujoo rwlock_init(&ei->i_prealloc_lock); 14119a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 14129a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1413edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1414eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1415edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1416dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1417d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1418d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 14191dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1420a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1421a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 142296c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1423a9e7f447SDmitry Monakhov #endif 14248aefcd55STheodore Ts'o ei->jinode = NULL; 14252e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1426744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1427b436b9beSJan Kara ei->i_sync_tid = 0; 1428b436b9beSJan Kara ei->i_datasync_tid = 0; 1429e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 14302e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1431aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1432aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1433ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1434ac27a0ecSDave Kleikamp } 1435ac27a0ecSDave Kleikamp 14367ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 14377ff9c073STheodore Ts'o { 14387ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 14397ff9c073STheodore Ts'o 144029b3692eSEric Biggers if (!drop) 144129b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 144229b3692eSEric Biggers 14437ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 14447ff9c073STheodore Ts'o return drop; 14457ff9c073STheodore Ts'o } 14467ff9c073STheodore Ts'o 144794053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1448fa0d7e3dSNick Piggin { 14492c58d548SEric Biggers fscrypt_free_inode(inode); 1450aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1451aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1452aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1453aa75f4d3SHarshad Shirwadkar } 1454fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1455fa0d7e3dSNick Piggin } 1456fa0d7e3dSNick Piggin 1457617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1458ac27a0ecSDave Kleikamp { 14599f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1460b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1461b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1462b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 14639f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 14649f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 14659f7dd93dSVasily Averin true); 14669f7dd93dSVasily Averin dump_stack(); 14679f7dd93dSVasily Averin } 14686fed8395SJeffle Xu 14696fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 14706fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 14716fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 14726fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 14736fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1474ac27a0ecSDave Kleikamp } 1475ac27a0ecSDave Kleikamp 1476f5db130dSChristoph Hellwig static void ext4_shutdown(struct super_block *sb) 1477f5db130dSChristoph Hellwig { 1478f5db130dSChristoph Hellwig ext4_force_shutdown(sb, EXT4_GOING_FLAGS_NOLOGFLUSH); 1479f5db130dSChristoph Hellwig } 1480f5db130dSChristoph Hellwig 148151cc5068SAlexey Dobriyan static void init_once(void *foo) 1482ac27a0ecSDave Kleikamp { 1483c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1484ac27a0ecSDave Kleikamp 1485ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1486ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14870e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1488ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1489aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1490ac27a0ecSDave Kleikamp } 1491ac27a0ecSDave Kleikamp 1492e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1493ac27a0ecSDave Kleikamp { 1494f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1495f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1496f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1497f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1498f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1499f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 150020c2df83SPaul Mundt init_once); 1501617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1502ac27a0ecSDave Kleikamp return -ENOMEM; 1503ac27a0ecSDave Kleikamp return 0; 1504ac27a0ecSDave Kleikamp } 1505ac27a0ecSDave Kleikamp 1506ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1507ac27a0ecSDave Kleikamp { 15088c0a8537SKirill A. Shutemov /* 15098c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 15108c0a8537SKirill A. Shutemov * destroy cache. 15118c0a8537SKirill A. Shutemov */ 15128c0a8537SKirill A. Shutemov rcu_barrier(); 1513617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1514ac27a0ecSDave Kleikamp } 1515ac27a0ecSDave Kleikamp 15160930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1517ac27a0ecSDave Kleikamp { 1518aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 15190930fcc1SAl Viro invalidate_inode_buffers(inode); 1520dbd5768fSJan Kara clear_inode(inode); 152127bc446eSbrookxu ext4_discard_preallocations(inode, 0); 152251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1523f4c2d372SJan Kara dquot_drop(inode); 15248aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 15258aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 15268aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 15278aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 15288aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 15298aefcd55STheodore Ts'o } 15303d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1531c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1532ac27a0ecSDave Kleikamp } 1533ac27a0ecSDave Kleikamp 15341b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 15351b961ac0SChristoph Hellwig u64 ino, u32 generation) 1536ac27a0ecSDave Kleikamp { 1537ac27a0ecSDave Kleikamp struct inode *inode; 1538ac27a0ecSDave Kleikamp 15398a363970STheodore Ts'o /* 1540ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1541ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1542ac27a0ecSDave Kleikamp */ 15438a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 15441d1fe1eeSDavid Howells if (IS_ERR(inode)) 15451d1fe1eeSDavid Howells return ERR_CAST(inode); 15461d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1547ac27a0ecSDave Kleikamp iput(inode); 1548ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1549ac27a0ecSDave Kleikamp } 15501b961ac0SChristoph Hellwig 15511b961ac0SChristoph Hellwig return inode; 1552ac27a0ecSDave Kleikamp } 15531b961ac0SChristoph Hellwig 15541b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 15551b961ac0SChristoph Hellwig int fh_len, int fh_type) 15561b961ac0SChristoph Hellwig { 15571b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 15581b961ac0SChristoph Hellwig ext4_nfs_get_inode); 15591b961ac0SChristoph Hellwig } 15601b961ac0SChristoph Hellwig 15611b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 15621b961ac0SChristoph Hellwig int fh_len, int fh_type) 15631b961ac0SChristoph Hellwig { 15641b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 15651b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1566ac27a0ecSDave Kleikamp } 1567ac27a0ecSDave Kleikamp 1568fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1569fde87268STheodore Ts'o { 1570fde87268STheodore Ts'o struct writeback_control wbc = { 1571fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1572fde87268STheodore Ts'o }; 1573fde87268STheodore Ts'o 1574fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1575fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1576fde87268STheodore Ts'o } 1577fde87268STheodore Ts'o 1578ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1579d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1580689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1581ac27a0ecSDave Kleikamp 1582617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1583617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1584617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1585617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1586617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15876f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15888c54ca9cSAl Viro const struct path *path); 1589617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1590ac27a0ecSDave Kleikamp size_t len, loff_t off); 1591617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1592ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15937c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15947c319d32SAditya Kali unsigned int flags); 1595ac27a0ecSDave Kleikamp 159696c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 159796c7e0d9SJan Kara { 159896c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 159996c7e0d9SJan Kara } 160096c7e0d9SJan Kara 160161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 160260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1603617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1604617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1605617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1606617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1607a5b5ee32SJan Kara .write_info = ext4_write_info, 1608a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1609a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1610040cb378SLi Xi .get_projid = ext4_get_projid, 16117a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1612ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1613ac27a0ecSDave Kleikamp }; 1614ac27a0ecSDave Kleikamp 16150d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1616617ba13bSMingming Cao .quota_on = ext4_quota_on, 1617ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1618287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16190a240339SJan Kara .get_state = dquot_get_state, 1620287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1621287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16226332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16236332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1624ac27a0ecSDave Kleikamp }; 1625ac27a0ecSDave Kleikamp #endif 1626ac27a0ecSDave Kleikamp 1627ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1628617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 162994053139SAl Viro .free_inode = ext4_free_in_core_inode, 1630617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1631617ba13bSMingming Cao .write_inode = ext4_write_inode, 1632617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16337ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16340930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1635617ba13bSMingming Cao .put_super = ext4_put_super, 1636617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1637c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1638c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1639617ba13bSMingming Cao .statfs = ext4_statfs, 1640617ba13bSMingming Cao .show_options = ext4_show_options, 1641f5db130dSChristoph Hellwig .shutdown = ext4_shutdown, 1642ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1643617ba13bSMingming Cao .quota_read = ext4_quota_read, 1644617ba13bSMingming Cao .quota_write = ext4_quota_write, 164596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1646ac27a0ecSDave Kleikamp #endif 1647ac27a0ecSDave Kleikamp }; 1648ac27a0ecSDave Kleikamp 164939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16501b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16511b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1652617ba13bSMingming Cao .get_parent = ext4_get_parent, 1653fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1654ac27a0ecSDave Kleikamp }; 1655ac27a0ecSDave Kleikamp 1656ac27a0ecSDave Kleikamp enum { 1657ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1658ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 165972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 16602d544ec9SYang Xu Opt_user_xattr, Opt_acl, 166172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1662ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1663ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1664ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16656ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16664f74d15fSEric Biggers Opt_inlinecrypt, 1667ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1668ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16691ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 16709cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1671327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 16724437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 16731449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16745328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1675744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1676fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1677cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 167821175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1679e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16808016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 168199c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16828016e29fSHarshad Shirwadkar #endif 1683ac27a0ecSDave Kleikamp }; 1684ac27a0ecSDave Kleikamp 1685e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1686ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1687ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1688ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1689e5a185c2SLukas Czerner {} 1690e5a185c2SLukas Czerner }; 1691e5a185c2SLukas Czerner 1692e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1693ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1694ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1695ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1696e5a185c2SLukas Czerner {} 1697e5a185c2SLukas Czerner }; 1698e5a185c2SLukas Czerner 1699e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1700e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1701e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1702e5a185c2SLukas Czerner {} 1703e5a185c2SLukas Czerner }; 1704e5a185c2SLukas Czerner 1705e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1706ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1707ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1708ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1709e5a185c2SLukas Czerner {} 1710e5a185c2SLukas Czerner }; 1711e5a185c2SLukas Czerner 1712e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1713e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1714e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1715e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1716e5a185c2SLukas Czerner {} 1717e5a185c2SLukas Czerner }; 1718e5a185c2SLukas Czerner 1719e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1720e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1721e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1722e5a185c2SLukas Czerner 1723e5a185c2SLukas Czerner /* 1724e5a185c2SLukas Czerner * Mount option specification 1725e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1726e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1727e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1728e5a185c2SLukas Czerner * separate for now. 1729e5a185c2SLukas Czerner */ 1730e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1731e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1732e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1733e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1734e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1735e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1736e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1737e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1738e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1739e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1740e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1741e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1742e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1743e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1744e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1745e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1746e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1747e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1748e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1749e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1750e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1751e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1752e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1753e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1754e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1755e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1756e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1757e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1758e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1759e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1760e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1761e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1762e5a185c2SLukas Czerner ext4_param_data_err), 1763e5a185c2SLukas Czerner fsparam_string_empty 1764e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1765e5a185c2SLukas Czerner fsparam_string_empty 1766e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1767e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1768e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1769e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1770e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1771e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1772e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1773e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1774e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1775e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 17761ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1777e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1778e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1779e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1780e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1781e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1782e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1783e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1784e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1785e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1786e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1787e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1788e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1789e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1790e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1791e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1792e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1793e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1794e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1795e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1796e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1797e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1798e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1799e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1800e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1801e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1802e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1803e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1804e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1805e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1806e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1807e5a185c2SLukas Czerner #endif 1808e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1809e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1810e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1811e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1812e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1813e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1814e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1815e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1816e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1817e5a185c2SLukas Czerner Opt_removed), 1818e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1819e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1820e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1821e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1822e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1823e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1824e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1825e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1826e5a185c2SLukas Czerner {} 1827e5a185c2SLukas Czerner }; 1828e5a185c2SLukas Czerner 1829b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1830196e402aSHarshad Shirwadkar 183126092bf5STheodore Ts'o #define MOPT_SET 0x0001 183226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 183326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 183426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 183526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 183626092bf5STheodore Ts'o #define MOPT_Q 0 1837ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 183826092bf5STheodore Ts'o #else 183926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 184026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 184126092bf5STheodore Ts'o #endif 1842ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1843ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18448dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1845ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1846ba2e524dSLukas Czerner #define MOPT_2 0x0100 184726092bf5STheodore Ts'o 184826092bf5STheodore Ts'o static const struct mount_opts { 184926092bf5STheodore Ts'o int token; 185026092bf5STheodore Ts'o int mount_opt; 185126092bf5STheodore Ts'o int flags; 185226092bf5STheodore Ts'o } ext4_mount_opts[] = { 185326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 185426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 185526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 185626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 185726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 185826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 18598dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 18608dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 18618dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 18628dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 186326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 186426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 18658dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 18668dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18678dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 186859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1869327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1870327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1871cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1872c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1873c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 18748dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 18751e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 187626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18778dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18781e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18798dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1880ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 188126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 188226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 188326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 188426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 188526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1886ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1887ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1888ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1889ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1890ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 189126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 189226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 189326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 189426092bf5STheodore Ts'o #else 189526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 189626092bf5STheodore Ts'o #endif 189726092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 189826092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 189926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 190026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 190126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 190226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 190326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 190449da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 190549da9392SJan Kara MOPT_SET | MOPT_Q}, 190626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 190749da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 190849da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1909ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1910ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1911ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1912cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 191321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 19143d392b26STheodore Ts'o MOPT_SET}, 191599c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 19160f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 19170f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 19188016e29fSHarshad Shirwadkar #endif 191922b8d707SJan Kara {Opt_abort, EXT4_MOUNT2_ABORT, MOPT_SET | MOPT_2}, 192026092bf5STheodore Ts'o {Opt_err, 0, 0} 192126092bf5STheodore Ts'o }; 192226092bf5STheodore Ts'o 19235298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1924c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1925c83ad55eSGabriel Krisman Bertazi __u16 magic; 1926c83ad55eSGabriel Krisman Bertazi char *name; 192749bd03ccSChristoph Hellwig unsigned int version; 1928c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 192949bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1930c83ad55eSGabriel Krisman Bertazi }; 1931c83ad55eSGabriel Krisman Bertazi 1932aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1933aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1934c83ad55eSGabriel Krisman Bertazi { 1935c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1936c83ad55eSGabriel Krisman Bertazi int i; 1937c83ad55eSGabriel Krisman Bertazi 1938c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1939c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1940aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1941c83ad55eSGabriel Krisman Bertazi 1942aa8bf298SChristoph Hellwig return NULL; 1943c83ad55eSGabriel Krisman Bertazi } 1944c83ad55eSGabriel Krisman Bertazi #endif 1945c83ad55eSGabriel Krisman Bertazi 19466e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 19476e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 19486e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 19496e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 19506e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 19516e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 19526e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 19536e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 19546e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 19556e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 19566e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 19576e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 19586e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 19596e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 19606e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 19616e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 19626e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 19637edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 196427b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 19656e47a3ccSLukas Czerner 1966461c3af0SLukas Czerner struct ext4_fs_context { 1967e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 196885456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1969e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 19706e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 19716e47a3ccSLukas Czerner int s_fc_debug_max_replay; 19726e47a3ccSLukas Czerner #endif 19736e47a3ccSLukas Czerner unsigned short qname_spec; 19746e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 19756e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 19766e47a3ccSLukas Czerner unsigned long journal_devnum; 19776e47a3ccSLukas Czerner unsigned long s_commit_interval; 19786e47a3ccSLukas Czerner unsigned long s_stripe; 19796e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19806e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19816e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19826e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19836e47a3ccSLukas Czerner unsigned int journal_ioprio; 19846e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19856e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19866e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19876e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1988b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19896e47a3ccSLukas Czerner unsigned int spec; 19906e47a3ccSLukas Czerner u32 s_max_batch_time; 19916e47a3ccSLukas Czerner u32 s_min_batch_time; 19926e47a3ccSLukas Czerner kuid_t s_resuid; 19936e47a3ccSLukas Czerner kgid_t s_resgid; 19947edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1995b237e304SHarshad Shirwadkar }; 1996b237e304SHarshad Shirwadkar 1997cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1998cebe85d5SLukas Czerner { 1999cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2000cebe85d5SLukas Czerner int i; 2001cebe85d5SLukas Czerner 2002cebe85d5SLukas Czerner if (!ctx) 2003cebe85d5SLukas Czerner return; 2004cebe85d5SLukas Czerner 2005cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 2006cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 2007cebe85d5SLukas Czerner 200885456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 2009cebe85d5SLukas Czerner kfree(ctx); 2010cebe85d5SLukas Czerner } 2011cebe85d5SLukas Czerner 2012cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2013cebe85d5SLukas Czerner { 2014da9e4802SDan Carpenter struct ext4_fs_context *ctx; 2015cebe85d5SLukas Czerner 2016cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2017cebe85d5SLukas Czerner if (!ctx) 2018cebe85d5SLukas Czerner return -ENOMEM; 2019cebe85d5SLukas Czerner 2020cebe85d5SLukas Czerner fc->fs_private = ctx; 2021cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2022cebe85d5SLukas Czerner 2023cebe85d5SLukas Czerner return 0; 2024cebe85d5SLukas Czerner } 2025cebe85d5SLukas Czerner 2026e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2027e6e268cbSLukas Czerner /* 2028e6e268cbSLukas Czerner * Note the name of the specified quota file. 2029e6e268cbSLukas Czerner */ 2030e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2031e6e268cbSLukas Czerner struct fs_parameter *param) 2032e6e268cbSLukas Czerner { 2033e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2034e6e268cbSLukas Czerner char *qname; 2035e6e268cbSLukas Czerner 2036e6e268cbSLukas Czerner if (param->size < 1) { 2037e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2038e6e268cbSLukas Czerner return -EINVAL; 2039e6e268cbSLukas Czerner } 2040e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2041e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2042e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2043e6e268cbSLukas Czerner return -EINVAL; 2044e6e268cbSLukas Czerner } 2045e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2046e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2047e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2048e6e268cbSLukas Czerner "%s quota file already specified", 2049e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2050e6e268cbSLukas Czerner return -EINVAL; 2051e6e268cbSLukas Czerner } 2052e6e268cbSLukas Czerner return 0; 2053e6e268cbSLukas Czerner } 2054e6e268cbSLukas Czerner 2055e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2056e6e268cbSLukas Czerner if (!qname) { 2057e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2058e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2059e6e268cbSLukas Czerner return -ENOMEM; 2060e6e268cbSLukas Czerner } 2061e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2062e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20636e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2064e6e268cbSLukas Czerner return 0; 2065e6e268cbSLukas Czerner } 2066e6e268cbSLukas Czerner 2067e6e268cbSLukas Czerner /* 2068e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2069e6e268cbSLukas Czerner */ 2070e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2071e6e268cbSLukas Czerner { 2072e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2073e6e268cbSLukas Czerner 2074e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2075e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2076e6e268cbSLukas Czerner 2077e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2078e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20796e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2080e6e268cbSLukas Czerner return 0; 2081e6e268cbSLukas Czerner } 2082e6e268cbSLukas Czerner #endif 2083e6e268cbSLukas Czerner 208485456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 208585456054SEric Biggers struct ext4_fs_context *ctx) 208685456054SEric Biggers { 208785456054SEric Biggers int err; 208885456054SEric Biggers 208985456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 209085456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 209185456054SEric Biggers "test_dummy_encryption option not supported"); 209285456054SEric Biggers return -EINVAL; 209385456054SEric Biggers } 209485456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 209585456054SEric Biggers &ctx->dummy_enc_policy); 209685456054SEric Biggers if (err == -EINVAL) { 209785456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 209885456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 209985456054SEric Biggers } else if (err == -EEXIST) { 210085456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 210185456054SEric Biggers "Conflicting test_dummy_encryption options"); 210285456054SEric Biggers return -EINVAL; 210385456054SEric Biggers } 210485456054SEric Biggers return err; 210585456054SEric Biggers } 210685456054SEric Biggers 21076e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 21084c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 21094c246728SLukas Czerner unsigned long flag) \ 21106e47a3ccSLukas Czerner { \ 21116e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21126e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2113e3952fccSLukas Czerner } 2114e3952fccSLukas Czerner 2115e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 21164c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 21174c246728SLukas Czerner unsigned long flag) \ 21186e47a3ccSLukas Czerner { \ 21196e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21206e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2121e3952fccSLukas Czerner } 2122e3952fccSLukas Czerner 2123e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 21244c246728SLukas Czerner static inline unsigned long \ 21254c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 21266e47a3ccSLukas Czerner { \ 21274c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2128e3952fccSLukas Czerner } 21296e47a3ccSLukas Czerner 2130e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 21316e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2132e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2133e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 21346e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2135e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2136e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2137e3952fccSLukas Czerner 213802f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 213926092bf5STheodore Ts'o { 2140461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2141461c3af0SLukas Czerner struct fs_parse_result result; 214226092bf5STheodore Ts'o const struct mount_opts *m; 2143461c3af0SLukas Czerner int is_remount; 214408cefc7aSEric W. Biederman kuid_t uid; 214508cefc7aSEric W. Biederman kgid_t gid; 2146461c3af0SLukas Czerner int token; 2147461c3af0SLukas Czerner 2148461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2149461c3af0SLukas Czerner if (token < 0) 2150461c3af0SLukas Czerner return token; 2151461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 215226092bf5STheodore Ts'o 2153ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2154ba2e524dSLukas Czerner if (token == m->token) 2155ba2e524dSLukas Czerner break; 2156ba2e524dSLukas Czerner 2157ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2158ba2e524dSLukas Czerner 2159ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2160ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2161ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2162ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2163ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2164ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2165ba2e524dSLukas Czerner } else 2166ba2e524dSLukas Czerner return -EINVAL; 2167ba2e524dSLukas Czerner } 2168ba2e524dSLukas Czerner 2169ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2170ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2171ba2e524dSLukas Czerner param->key); 2172ba2e524dSLukas Czerner return 0; 2173ba2e524dSLukas Czerner } 2174ba2e524dSLukas Czerner 2175ba2e524dSLukas Czerner switch (token) { 217657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2177ba2e524dSLukas Czerner case Opt_usrjquota: 2178461c3af0SLukas Czerner if (!*param->string) 2179e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2180461c3af0SLukas Czerner else 2181e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2182ba2e524dSLukas Czerner case Opt_grpjquota: 2183461c3af0SLukas Czerner if (!*param->string) 2184e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2185461c3af0SLukas Czerner else 2186e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 218757f73c2cSTheodore Ts'o #endif 218826092bf5STheodore Ts'o case Opt_sb: 21897edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21907edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21917edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21927edfd85bSLukas Czerner } else { 21937edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21947edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21957edfd85bSLukas Czerner } 219602f960f8SLukas Czerner return 0; 219726092bf5STheodore Ts'o case Opt_removed: 2198da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2199461c3af0SLukas Czerner param->key); 220002f960f8SLukas Czerner return 0; 22014f74d15fSEric Biggers case Opt_inlinecrypt: 22024f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 22036e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 22044f74d15fSEric Biggers #else 2205da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 22064f74d15fSEric Biggers #endif 220702f960f8SLukas Czerner return 0; 2208461c3af0SLukas Czerner case Opt_errors: 22096e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2210ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2211ba2e524dSLukas Czerner return 0; 2212ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2213ba2e524dSLukas Czerner case Opt_jqfmt: 2214ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2215ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2216ba2e524dSLukas Czerner return 0; 2217ba2e524dSLukas Czerner #endif 2218ba2e524dSLukas Czerner case Opt_data: 2219ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2220ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2221ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2222ba2e524dSLukas Czerner return 0; 2223ba2e524dSLukas Czerner case Opt_commit: 2224461c3af0SLukas Czerner if (result.uint_32 == 0) 2225934b0de1SWang Jianjian result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE; 2226461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2227da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22289ba55543Szhangyi (F) "Invalid commit interval %d, " 22299ba55543Szhangyi (F) "must be smaller than %d", 2230461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2231da812f61SLukas Czerner return -EINVAL; 22329ba55543Szhangyi (F) } 22336e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2235ba2e524dSLukas Czerner return 0; 2236ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22376e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2238da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2239461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2240da812f61SLukas Czerner return -EINVAL; 22419803387cSTheodore Ts'o } 22426e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 22436e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2244ba2e524dSLukas Czerner return 0; 2245ba2e524dSLukas Czerner case Opt_max_batch_time: 22466e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 22476e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2248ba2e524dSLukas Czerner return 0; 2249ba2e524dSLukas Czerner case Opt_min_batch_time: 22506e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 22516e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2252ba2e524dSLukas Czerner return 0; 2253ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2254461c3af0SLukas Czerner if (result.uint_32 && 2255461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2256461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2257da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2258e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2259e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2260da812f61SLukas Czerner return -EINVAL; 226126092bf5STheodore Ts'o } 22626e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 22636e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2264ba2e524dSLukas Czerner return 0; 2265ba2e524dSLukas Czerner case Opt_init_itable: 22666e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22676e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2268461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22696e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22706e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2271ba2e524dSLukas Czerner return 0; 2272ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22736e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22746e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2275ba2e524dSLukas Czerner return 0; 22768016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2277ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22786e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22796e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2280ba2e524dSLukas Czerner return 0; 22818016e29fSHarshad Shirwadkar #endif 2282ba2e524dSLukas Czerner case Opt_stripe: 22836e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22846e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2285ba2e524dSLukas Czerner return 0; 2286ba2e524dSLukas Czerner case Opt_resuid: 2287461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22880efb3b23SJan Kara if (!uid_valid(uid)) { 2289da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2290461c3af0SLukas Czerner result.uint_32); 2291da812f61SLukas Czerner return -EINVAL; 22920efb3b23SJan Kara } 22936e47a3ccSLukas Czerner ctx->s_resuid = uid; 22946e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2295ba2e524dSLukas Czerner return 0; 2296ba2e524dSLukas Czerner case Opt_resgid: 2297461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22980efb3b23SJan Kara if (!gid_valid(gid)) { 2299da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2300461c3af0SLukas Czerner result.uint_32); 2301da812f61SLukas Czerner return -EINVAL; 23020efb3b23SJan Kara } 23036e47a3ccSLukas Czerner ctx->s_resgid = gid; 23046e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2305ba2e524dSLukas Czerner return 0; 2306ba2e524dSLukas Czerner case Opt_journal_dev: 23070efb3b23SJan Kara if (is_remount) { 2308da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 23090efb3b23SJan Kara "Cannot specify journal on remount"); 2310da812f61SLukas Czerner return -EINVAL; 23110efb3b23SJan Kara } 2312461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 23136e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2314ba2e524dSLukas Czerner return 0; 2315ba2e524dSLukas Czerner case Opt_journal_path: 2316ba2e524dSLukas Czerner { 2317ad4eec61SEric Sandeen struct inode *journal_inode; 2318ad4eec61SEric Sandeen struct path path; 2319ad4eec61SEric Sandeen int error; 2320ad4eec61SEric Sandeen 2321ad4eec61SEric Sandeen if (is_remount) { 2322da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2323ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2324da812f61SLukas Czerner return -EINVAL; 2325ad4eec61SEric Sandeen } 2326ad4eec61SEric Sandeen 2327e3ea75eeSLukas Czerner error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path); 2328ad4eec61SEric Sandeen if (error) { 2329da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2330461c3af0SLukas Czerner "journal device path"); 2331da812f61SLukas Czerner return -EINVAL; 2332ad4eec61SEric Sandeen } 2333ad4eec61SEric Sandeen 23342b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2335461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23366e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2337ad4eec61SEric Sandeen path_put(&path); 2338ba2e524dSLukas Czerner return 0; 2339ba2e524dSLukas Czerner } 2340ba2e524dSLukas Czerner case Opt_journal_ioprio: 2341461c3af0SLukas Czerner if (result.uint_32 > 7) { 2342da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 23430efb3b23SJan Kara " (must be 0-7)"); 2344da812f61SLukas Czerner return -EINVAL; 23450efb3b23SJan Kara } 2346461c3af0SLukas Czerner ctx->journal_ioprio = 2347461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 23486e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2349ba2e524dSLukas Czerner return 0; 2350ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 235185456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2352ba2e524dSLukas Czerner case Opt_dax: 2353ba2e524dSLukas Czerner case Opt_dax_type: 2354ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2355ba2e524dSLukas Czerner { 2356ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2357ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2358ba2e524dSLukas Czerner 2359ba2e524dSLukas Czerner switch (type) { 23609cb20f94SIra Weiny case Opt_dax: 23619cb20f94SIra Weiny case Opt_dax_always: 2362ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23636e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23649cb20f94SIra Weiny break; 23659cb20f94SIra Weiny case Opt_dax_never: 2366ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23676e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23689cb20f94SIra Weiny break; 23699cb20f94SIra Weiny case Opt_dax_inode: 23706e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23716e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23729cb20f94SIra Weiny /* Strictly for printing options */ 2373ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23749cb20f94SIra Weiny break; 23759cb20f94SIra Weiny } 2376ba2e524dSLukas Czerner return 0; 2377ba2e524dSLukas Czerner } 2378ef83b6e8SDan Williams #else 2379da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2380da812f61SLukas Czerner return -EINVAL; 2381923ae0ffSRoss Zwisler #endif 2382ba2e524dSLukas Czerner case Opt_data_err: 2383ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23846e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2385ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23866e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2387ba2e524dSLukas Czerner return 0; 2388ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 238927b38686SOjaswin Mujoo if (result.int_32 == 1) { 239027b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 239127b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 239227b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 239327b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 239427b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 239527b38686SOjaswin Mujoo } else { 2396da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2397196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2398da812f61SLukas Czerner return -EINVAL; 2399196e402aSHarshad Shirwadkar } 2400ba2e524dSLukas Czerner return 0; 2401ba2e524dSLukas Czerner } 2402ba2e524dSLukas Czerner 2403ba2e524dSLukas Czerner /* 2404ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2405ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2406ba2e524dSLukas Czerner */ 2407ba2e524dSLukas Czerner if (m->token == Opt_err) { 2408ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2409ba2e524dSLukas Czerner param->key); 2410ba2e524dSLukas Czerner WARN_ON(1); 2411ba2e524dSLukas Czerner return -EINVAL; 2412ba2e524dSLukas Czerner } 2413ba2e524dSLukas Czerner 2414ba2e524dSLukas Czerner else { 2415461c3af0SLukas Czerner unsigned int set = 0; 2416461c3af0SLukas Czerner 2417461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2418461c3af0SLukas Czerner result.uint_32 > 0) 2419461c3af0SLukas Czerner set = 1; 2420461c3af0SLukas Czerner 242126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2422461c3af0SLukas Czerner set = !set; 242326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2424da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2425461c3af0SLukas Czerner "buggy handling of option %s", 2426461c3af0SLukas Czerner param->key); 242726092bf5STheodore Ts'o WARN_ON(1); 2428da812f61SLukas Czerner return -EINVAL; 242926092bf5STheodore Ts'o } 2430995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2431461c3af0SLukas Czerner if (set != 0) 24326e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2433995a3ed6SHarshad Shirwadkar else 24346e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2435995a3ed6SHarshad Shirwadkar } else { 2436461c3af0SLukas Czerner if (set != 0) 24376e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 243826092bf5STheodore Ts'o else 24396e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 244026092bf5STheodore Ts'o } 2441995a3ed6SHarshad Shirwadkar } 2442ba2e524dSLukas Czerner 244302f960f8SLukas Czerner return 0; 244426092bf5STheodore Ts'o } 244526092bf5STheodore Ts'o 24467edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2447ac27a0ecSDave Kleikamp { 2448461c3af0SLukas Czerner struct fs_parameter param; 2449461c3af0SLukas Czerner int ret; 2450461c3af0SLukas Czerner char *key; 2451ac27a0ecSDave Kleikamp 2452ac27a0ecSDave Kleikamp if (!options) 24537edfd85bSLukas Czerner return 0; 2454461c3af0SLukas Czerner 2455461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2456461c3af0SLukas Czerner if (*key) { 2457461c3af0SLukas Czerner size_t v_len = 0; 2458461c3af0SLukas Czerner char *value = strchr(key, '='); 2459461c3af0SLukas Czerner 2460461c3af0SLukas Czerner param.type = fs_value_is_flag; 2461461c3af0SLukas Czerner param.string = NULL; 2462461c3af0SLukas Czerner 2463461c3af0SLukas Czerner if (value) { 2464461c3af0SLukas Czerner if (value == key) 2465ac27a0ecSDave Kleikamp continue; 2466461c3af0SLukas Czerner 2467461c3af0SLukas Czerner *value++ = 0; 2468461c3af0SLukas Czerner v_len = strlen(value); 2469461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2470461c3af0SLukas Czerner GFP_KERNEL); 2471461c3af0SLukas Czerner if (!param.string) 24727edfd85bSLukas Czerner return -ENOMEM; 2473461c3af0SLukas Czerner param.type = fs_value_is_string; 2474461c3af0SLukas Czerner } 2475461c3af0SLukas Czerner 2476461c3af0SLukas Czerner param.key = key; 2477461c3af0SLukas Czerner param.size = v_len; 2478461c3af0SLukas Czerner 247902f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2480461c3af0SLukas Czerner if (param.string) 2481461c3af0SLukas Czerner kfree(param.string); 2482461c3af0SLukas Czerner if (ret < 0) 24837edfd85bSLukas Czerner return ret; 2484ac27a0ecSDave Kleikamp } 2485461c3af0SLukas Czerner } 2486461c3af0SLukas Czerner 24877edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2488da812f61SLukas Czerner if (ret < 0) 24897edfd85bSLukas Czerner return ret; 24907edfd85bSLukas Czerner 24917edfd85bSLukas Czerner return 0; 24927edfd85bSLukas Czerner } 24937edfd85bSLukas Czerner 24947edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24957edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24967edfd85bSLukas Czerner { 24977edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24987edfd85bSLukas Czerner char *s_mount_opts = NULL; 24997edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 25007edfd85bSLukas Czerner struct fs_context *fc = NULL; 25017edfd85bSLukas Czerner int ret = -ENOMEM; 25027edfd85bSLukas Czerner 25037edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2504da812f61SLukas Czerner return 0; 2505da812f61SLukas Czerner 25067edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 25077edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 25087edfd85bSLukas Czerner GFP_KERNEL); 25097edfd85bSLukas Czerner if (!s_mount_opts) 25107edfd85bSLukas Czerner return ret; 2511e6e268cbSLukas Czerner 25127edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 25137edfd85bSLukas Czerner if (!fc) 25147edfd85bSLukas Czerner goto out_free; 2515e6e268cbSLukas Czerner 25167edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 25177edfd85bSLukas Czerner if (!s_ctx) 25187edfd85bSLukas Czerner goto out_free; 25197edfd85bSLukas Czerner 25207edfd85bSLukas Czerner fc->fs_private = s_ctx; 25217edfd85bSLukas Czerner fc->s_fs_info = sbi; 25227edfd85bSLukas Czerner 25237edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 25247edfd85bSLukas Czerner if (ret < 0) 25257edfd85bSLukas Czerner goto parse_failed; 25267edfd85bSLukas Czerner 25277edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 25287edfd85bSLukas Czerner if (ret < 0) { 25297edfd85bSLukas Czerner parse_failed: 25307edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 25317edfd85bSLukas Czerner "failed to parse options in superblock: %s", 25327edfd85bSLukas Czerner s_mount_opts); 25337edfd85bSLukas Czerner ret = 0; 25347edfd85bSLukas Czerner goto out_free; 25357edfd85bSLukas Czerner } 25367edfd85bSLukas Czerner 25377edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 25387edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 25397edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 25407edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 25417edfd85bSLukas Czerner 254285456054SEric Biggers ext4_apply_options(fc, sb); 254385456054SEric Biggers ret = 0; 25447edfd85bSLukas Czerner 25457edfd85bSLukas Czerner out_free: 2546c069db76SEric Biggers if (fc) { 2547c069db76SEric Biggers ext4_fc_free(fc); 25487edfd85bSLukas Czerner kfree(fc); 2549c069db76SEric Biggers } 25507edfd85bSLukas Czerner kfree(s_mount_opts); 25517edfd85bSLukas Czerner return ret; 25524c94bff9SLukas Czerner } 25534c94bff9SLukas Czerner 2554e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2555e6e268cbSLukas Czerner struct super_block *sb) 2556e6e268cbSLukas Czerner { 2557e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 25586e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2559e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2560e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2561e6e268cbSLukas Czerner char *qname; 2562e6e268cbSLukas Czerner int i; 2563e6e268cbSLukas Czerner 25646e47a3ccSLukas Czerner if (quota_feature) 25656e47a3ccSLukas Czerner return; 25666e47a3ccSLukas Czerner 25676e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2568e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2569e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2570e6e268cbSLukas Czerner continue; 25716e47a3ccSLukas Czerner 2572e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25734c1bd5a9SLukas Czerner if (qname) 25744c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2575e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 257613b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 257713b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 257813b215a9SLukas Czerner if (qname) 257910e4f310SUladzislau Rezki (Sony) kfree_rcu_mightsleep(qname); 2580e6e268cbSLukas Czerner } 25816e47a3ccSLukas Czerner } 25826e47a3ccSLukas Czerner 25836e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25846e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2585e6e268cbSLukas Czerner #endif 2586e6e268cbSLukas Czerner } 2587e6e268cbSLukas Czerner 2588e6e268cbSLukas Czerner /* 2589e6e268cbSLukas Czerner * Check quota settings consistency. 2590e6e268cbSLukas Czerner */ 2591e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2592e6e268cbSLukas Czerner struct super_block *sb) 2593e6e268cbSLukas Czerner { 2594e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2595e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2596e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2597e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2598e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25996e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 26006e47a3ccSLukas Czerner int quota_flags, i; 2601e6e268cbSLukas Czerner 26026e47a3ccSLukas Czerner /* 26036e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 26046e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 26056e47a3ccSLukas Czerner * to support legacy quotas in quota files. 26066e47a3ccSLukas Czerner */ 26076e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 26086e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 26096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 26106e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 26116e47a3ccSLukas Czerner return -EINVAL; 26126e47a3ccSLukas Czerner } 26136e47a3ccSLukas Czerner 26146e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 26156e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 26166e47a3ccSLukas Czerner if (quota_loaded && 26176e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 26186e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 26196e47a3ccSLukas Czerner goto err_quota_change; 26206e47a3ccSLukas Czerner 26216e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2622e6e268cbSLukas Czerner 2623e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2624e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2625e6e268cbSLukas Czerner continue; 2626e6e268cbSLukas Czerner 26276e47a3ccSLukas Czerner if (quota_loaded && 26286e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2629e6e268cbSLukas Czerner goto err_jquota_change; 2630e6e268cbSLukas Czerner 2631e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 263213b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2633e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2634e6e268cbSLukas Czerner goto err_jquota_specified; 2635e6e268cbSLukas Czerner } 26366e47a3ccSLukas Czerner 26376e47a3ccSLukas Czerner if (quota_feature) { 26386e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 26396e47a3ccSLukas Czerner "Journaled quota options ignored when " 26406e47a3ccSLukas Czerner "QUOTA feature is enabled"); 26416e47a3ccSLukas Czerner return 0; 26426e47a3ccSLukas Czerner } 2643e6e268cbSLukas Czerner } 2644e6e268cbSLukas Czerner 26456e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2646e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 26476e47a3ccSLukas Czerner goto err_jquota_change; 2648e6e268cbSLukas Czerner if (quota_feature) { 2649e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2650e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2651e6e268cbSLukas Czerner return 0; 2652e6e268cbSLukas Czerner } 2653e6e268cbSLukas Czerner } 26546e47a3ccSLukas Czerner 26556e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 26566e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 26576e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 26586e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 26596e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 26606e47a3ccSLukas Czerner 26616e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 26626e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 26636e47a3ccSLukas Czerner 26646e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 26656e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 26666e47a3ccSLukas Czerner 26676e47a3ccSLukas Czerner if (usr_qf_name) { 26686e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26696e47a3ccSLukas Czerner usrquota = false; 26706e47a3ccSLukas Czerner } 26716e47a3ccSLukas Czerner if (grp_qf_name) { 26726e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26736e47a3ccSLukas Czerner grpquota = false; 26746e47a3ccSLukas Czerner } 26756e47a3ccSLukas Czerner 26766e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26776e47a3ccSLukas Czerner if (usrquota || grpquota) { 26786e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26796e47a3ccSLukas Czerner "format mixing"); 26806e47a3ccSLukas Czerner return -EINVAL; 26816e47a3ccSLukas Czerner } 26826e47a3ccSLukas Czerner 26836e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26846e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26856e47a3ccSLukas Czerner "not specified"); 26866e47a3ccSLukas Czerner return -EINVAL; 26876e47a3ccSLukas Czerner } 26886e47a3ccSLukas Czerner } 26896e47a3ccSLukas Czerner 2690e6e268cbSLukas Czerner return 0; 2691e6e268cbSLukas Czerner 2692e6e268cbSLukas Czerner err_quota_change: 2693e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2694e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2695e6e268cbSLukas Czerner return -EINVAL; 2696e6e268cbSLukas Czerner err_jquota_change: 2697e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2698e6e268cbSLukas Czerner "options when quota turned on"); 2699e6e268cbSLukas Czerner return -EINVAL; 2700e6e268cbSLukas Czerner err_jquota_specified: 2701e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2702e6e268cbSLukas Czerner QTYPE2NAME(i)); 2703e6e268cbSLukas Czerner return -EINVAL; 2704e6e268cbSLukas Czerner #else 2705e6e268cbSLukas Czerner return 0; 2706e6e268cbSLukas Czerner #endif 2707e6e268cbSLukas Czerner } 2708e6e268cbSLukas Czerner 27095f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 27105f41fdaeSEric Biggers struct super_block *sb) 27115f41fdaeSEric Biggers { 27125f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 27135f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 27145f41fdaeSEric Biggers 271585456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 27165f41fdaeSEric Biggers return 0; 27175f41fdaeSEric Biggers 27185f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 27195f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 27205f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 27215f41fdaeSEric Biggers return -EINVAL; 27225f41fdaeSEric Biggers } 27235f41fdaeSEric Biggers /* 27245f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 27255f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 27265f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 27275f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 27285f41fdaeSEric Biggers */ 272985456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 273085456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 273185456054SEric Biggers &ctx->dummy_enc_policy)) 273285456054SEric Biggers return 0; 27335f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 273485456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 27355f41fdaeSEric Biggers return -EINVAL; 27365f41fdaeSEric Biggers } 273785456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 273885456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 273985456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 274085456054SEric Biggers &ctx->dummy_enc_policy)) 27415f41fdaeSEric Biggers return 0; 274285456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 274385456054SEric Biggers "Conflicting test_dummy_encryption options"); 274485456054SEric Biggers return -EINVAL; 274585456054SEric Biggers } 27467959eb19SEric Biggers return 0; 274785456054SEric Biggers } 274885456054SEric Biggers 274985456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 275085456054SEric Biggers struct super_block *sb) 275185456054SEric Biggers { 275285456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 275385456054SEric Biggers /* if already set, it was already verified to be the same */ 275485456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 275585456054SEric Biggers return; 275685456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 275785456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 275885456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27595f41fdaeSEric Biggers } 27605f41fdaeSEric Biggers 2761b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2762b6bd2435SLukas Czerner struct super_block *sb) 2763b6bd2435SLukas Czerner { 2764b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27656e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27666e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27675f41fdaeSEric Biggers int err; 2768b6bd2435SLukas Czerner 2769b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2770b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2771b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2772b6bd2435SLukas Czerner return -EINVAL; 2773b6bd2435SLukas Czerner } 2774b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2775b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2776b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2777b6bd2435SLukas Czerner return -EINVAL; 2778b6bd2435SLukas Czerner } 2779b6bd2435SLukas Czerner 27806e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27816e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27826e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27836e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27846e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27856e47a3ccSLukas Czerner return -EINVAL; 27866e47a3ccSLukas Czerner } 27876e47a3ccSLukas Czerner 27886e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27896e47a3ccSLukas Czerner int blocksize = 27906e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27916e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27926e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27936e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27946e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27956e47a3ccSLukas Czerner } 27966e47a3ccSLukas Czerner 27975f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27985f41fdaeSEric Biggers if (err) 27995f41fdaeSEric Biggers return err; 28006e47a3ccSLukas Czerner 28016e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 28026e47a3ccSLukas Czerner if (!sbi->s_journal) { 28036e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 28046e47a3ccSLukas Czerner "Remounting file system with no journal " 28056e47a3ccSLukas Czerner "so ignoring journalled data option"); 28066e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 28074c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 28084c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 28096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 28106e47a3ccSLukas Czerner "on remount"); 28116e47a3ccSLukas Czerner return -EINVAL; 28126e47a3ccSLukas Czerner } 28136e47a3ccSLukas Czerner } 28146e47a3ccSLukas Czerner 28156e47a3ccSLukas Czerner if (is_remount) { 28166e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28176e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 28186e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 28196e47a3ccSLukas Czerner "both data=journal and dax"); 28206e47a3ccSLukas Czerner return -EINVAL; 28216e47a3ccSLukas Czerner } 28226e47a3ccSLukas Czerner 28236e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28246e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28256e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28266e47a3ccSLukas Czerner fail_dax_change_remount: 28276e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28286e47a3ccSLukas Czerner "dax mount option while remounting"); 28296e47a3ccSLukas Czerner return -EINVAL; 28306e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28316e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28326e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28336e47a3ccSLukas Czerner goto fail_dax_change_remount; 28346e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28356e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28366e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28376e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28386e47a3ccSLukas Czerner goto fail_dax_change_remount; 28396e47a3ccSLukas Czerner } 28406e47a3ccSLukas Czerner } 28416e47a3ccSLukas Czerner 2842b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2843b6bd2435SLukas Czerner } 2844b6bd2435SLukas Czerner 284585456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28466e47a3ccSLukas Czerner { 28476e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28486e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28496e47a3ccSLukas Czerner 28506e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28516e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28526e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28536e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28546e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28556e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28566e47a3ccSLukas Czerner 28576e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28586e47a3ccSLukas Czerner APPLY(s_commit_interval); 28596e47a3ccSLukas Czerner APPLY(s_stripe); 28606e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28616e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28626e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28636e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28646e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28656e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28666e47a3ccSLukas Czerner APPLY(s_resgid); 28676e47a3ccSLukas Czerner APPLY(s_resuid); 28686e47a3ccSLukas Czerner 28696e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28706e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28716e47a3ccSLukas Czerner #endif 28726e47a3ccSLukas Czerner 28736e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 287485456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28756e47a3ccSLukas Czerner } 28766e47a3ccSLukas Czerner 28776e47a3ccSLukas Czerner 2878da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28794c94bff9SLukas Czerner { 2880ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28816e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28824c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28836e47a3ccSLukas Czerner 28846e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28856e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28866e47a3ccSLukas Czerner 288733458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28886e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28896e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2890ac27a0ecSDave Kleikamp 28916e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28926e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2893ac27a0ecSDave Kleikamp 28946e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28956e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2896da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2897b31e1552SEric Sandeen "format mixing"); 2898da812f61SLukas Czerner return -EINVAL; 2899ac27a0ecSDave Kleikamp } 2900ac27a0ecSDave Kleikamp } 2901ac27a0ecSDave Kleikamp #endif 29026e47a3ccSLukas Czerner return 1; 2903ac27a0ecSDave Kleikamp } 2904ac27a0ecSDave Kleikamp 29052adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 29062adf6da8STheodore Ts'o struct super_block *sb) 29072adf6da8STheodore Ts'o { 29082adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 29092adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 291033458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 29112adf6da8STheodore Ts'o 29122adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 29132adf6da8STheodore Ts'o char *fmtname = ""; 29142adf6da8STheodore Ts'o 29152adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 29162adf6da8STheodore Ts'o case QFMT_VFS_OLD: 29172adf6da8STheodore Ts'o fmtname = "vfsold"; 29182adf6da8STheodore Ts'o break; 29192adf6da8STheodore Ts'o case QFMT_VFS_V0: 29202adf6da8STheodore Ts'o fmtname = "vfsv0"; 29212adf6da8STheodore Ts'o break; 29222adf6da8STheodore Ts'o case QFMT_VFS_V1: 29232adf6da8STheodore Ts'o fmtname = "vfsv1"; 29242adf6da8STheodore Ts'o break; 29252adf6da8STheodore Ts'o } 29262adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29272adf6da8STheodore Ts'o } 29282adf6da8STheodore Ts'o 292933458eabSTheodore Ts'o rcu_read_lock(); 293033458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 293133458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 293233458eabSTheodore Ts'o if (usr_qf_name) 293333458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 293433458eabSTheodore Ts'o if (grp_qf_name) 293533458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 293633458eabSTheodore Ts'o rcu_read_unlock(); 29372adf6da8STheodore Ts'o #endif 29382adf6da8STheodore Ts'o } 29392adf6da8STheodore Ts'o 29405a916be1STheodore Ts'o static const char *token2str(int token) 29415a916be1STheodore Ts'o { 294297d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29435a916be1STheodore Ts'o 294497d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 294597d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29465a916be1STheodore Ts'o break; 294797d8a670SLukas Czerner return spec->name; 29485a916be1STheodore Ts'o } 29495a916be1STheodore Ts'o 29502adf6da8STheodore Ts'o /* 29512adf6da8STheodore Ts'o * Show an option if 29522adf6da8STheodore Ts'o * - it's set to a non-default value OR 29532adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29542adf6da8STheodore Ts'o */ 295566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 295666acdcf4STheodore Ts'o int nodefs) 29572adf6da8STheodore Ts'o { 29582adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29592adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 2960e3645d72SZhang Yi int def_errors; 29615a916be1STheodore Ts'o const struct mount_opts *m; 296266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29632adf6da8STheodore Ts'o 296466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 296566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29662adf6da8STheodore Ts'o 29672adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29685a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29695a916be1STheodore Ts'o 29705a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29715a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 2972e3645d72SZhang Yi int opt_2 = m->flags & MOPT_2; 2973e3645d72SZhang Yi unsigned int mount_opt, def_mount_opt; 2974e3645d72SZhang Yi 29755a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2976ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29775a916be1STheodore Ts'o continue; 2978e3645d72SZhang Yi 2979e3645d72SZhang Yi if (opt_2) { 2980e3645d72SZhang Yi mount_opt = sbi->s_mount_opt2; 2981e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt2; 2982e3645d72SZhang Yi } else { 2983e3645d72SZhang Yi mount_opt = sbi->s_mount_opt; 2984e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt; 2985e3645d72SZhang Yi } 2986e3645d72SZhang Yi /* skip if same as the default */ 2987e3645d72SZhang Yi if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt))) 2988e3645d72SZhang Yi continue; 2989e3645d72SZhang Yi /* select Opt_noFoo vs Opt_Foo */ 29905a916be1STheodore Ts'o if ((want_set && 2991e3645d72SZhang Yi (mount_opt & m->mount_opt) != m->mount_opt) || 2992e3645d72SZhang Yi (!want_set && (mount_opt & m->mount_opt))) 2993e3645d72SZhang Yi continue; 29945a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29955a916be1STheodore Ts'o } 29965a916be1STheodore Ts'o 299708cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29985a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 299908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 300008cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 300108cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 30025a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 300308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 300408cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 300566acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 30065a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 30075a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 30082adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 30095a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 30102adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 30115a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 301266acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 30135a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 301466acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 30155a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 301666acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 30175a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 301866acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30195a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 302068afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 3021e3645d72SZhang Yi (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 30222adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30235a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30242adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30255a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30262adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30275a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30285a916be1STheodore Ts'o } 302966acdcf4STheodore Ts'o if (nodefs || 303066acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30315a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30322adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30332adf6da8STheodore Ts'o 3034ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 303566acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30365a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3037df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3038df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30397915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30407915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3041ed318a6cSEric Biggers 3042ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30432adf6da8STheodore Ts'o 30444f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30454f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30464f74d15fSEric Biggers 30479cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30489cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30499cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30509cb20f94SIra Weiny else 30519cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30529cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30539cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30549cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30559cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30569cb20f94SIra Weiny } 30573fa5d23eSOjaswin Mujoo 30583fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30593fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30603fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 30613fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30623fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30633fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 30643fa5d23eSOjaswin Mujoo } 30653fa5d23eSOjaswin Mujoo 30662adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30672adf6da8STheodore Ts'o return 0; 30682adf6da8STheodore Ts'o } 30692adf6da8STheodore Ts'o 307066acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 307166acdcf4STheodore Ts'o { 307266acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 307366acdcf4STheodore Ts'o } 307466acdcf4STheodore Ts'o 3075ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 307666acdcf4STheodore Ts'o { 307766acdcf4STheodore Ts'o struct super_block *sb = seq->private; 307866acdcf4STheodore Ts'o int rc; 307966acdcf4STheodore Ts'o 3080bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 308166acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 308266acdcf4STheodore Ts'o seq_puts(seq, "\n"); 308366acdcf4STheodore Ts'o return rc; 308466acdcf4STheodore Ts'o } 308566acdcf4STheodore Ts'o 3086617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3087ac27a0ecSDave Kleikamp int read_only) 3088ac27a0ecSDave Kleikamp { 3089617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3090c89128a0SJaegeuk Kim int err = 0; 3091ac27a0ecSDave Kleikamp 3092617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3093b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3094b31e1552SEric Sandeen "forcing read-only mode"); 3095c89128a0SJaegeuk Kim err = -EROFS; 30965adaccacSyangerkun goto done; 3097ac27a0ecSDave Kleikamp } 3098ac27a0ecSDave Kleikamp if (read_only) 3099281b5995STheodore Ts'o goto done; 3100617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3101b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3102b31e1552SEric Sandeen "running e2fsck is recommended"); 3103c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3104b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3105b31e1552SEric Sandeen "warning: mounting fs with errors, " 3106b31e1552SEric Sandeen "running e2fsck is recommended"); 3107ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3108ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3109ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3110b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3111b31e1552SEric Sandeen "warning: maximal mount count reached, " 3112b31e1552SEric Sandeen "running e2fsck is recommended"); 3113ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 31146a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 31156a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3116b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3117b31e1552SEric Sandeen "warning: checktime reached, " 3118b31e1552SEric Sandeen "running e2fsck is recommended"); 31190390131bSFrank Mayhar if (!sbi->s_journal) 3120216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3121ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3122617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3123e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31246a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 312502f310fcSJan Kara if (sbi->s_journal) { 3126e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 312702f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 312802f310fcSJan Kara ext4_set_feature_orphan_present(sb); 312902f310fcSJan Kara } 3130ac27a0ecSDave Kleikamp 31314392fbc4SJan Kara err = ext4_commit_super(sb); 3132281b5995STheodore Ts'o done: 3133ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3134a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3135a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3136ac27a0ecSDave Kleikamp sb->s_blocksize, 3137ac27a0ecSDave Kleikamp sbi->s_groups_count, 3138617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3139617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3140a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3141c89128a0SJaegeuk Kim return err; 3142ac27a0ecSDave Kleikamp } 3143ac27a0ecSDave Kleikamp 3144117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3145117fff10STheodore Ts'o { 3146117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31477c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 314837b0b6b8SDan Carpenter int size, i, j; 3149117fff10STheodore Ts'o 3150117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3151117fff10STheodore Ts'o return 0; 3152117fff10STheodore Ts'o 3153117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3154117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3155117fff10STheodore Ts'o return 0; 3156117fff10STheodore Ts'o 31577c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31587c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3159117fff10STheodore Ts'o if (!new_groups) { 31607c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31617c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3162117fff10STheodore Ts'o return -ENOMEM; 3163117fff10STheodore Ts'o } 31647c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31657c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31667c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31677c990728SSuraj Jitindar Singh GFP_KERNEL); 31687c990728SSuraj Jitindar Singh if (!new_groups[i]) { 316937b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 317037b0b6b8SDan Carpenter kvfree(new_groups[j]); 31717c990728SSuraj Jitindar Singh kvfree(new_groups); 31727c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31737c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31747c990728SSuraj Jitindar Singh return -ENOMEM; 3175117fff10STheodore Ts'o } 31767c990728SSuraj Jitindar Singh } 31777c990728SSuraj Jitindar Singh rcu_read_lock(); 31787c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31797c990728SSuraj Jitindar Singh if (old_groups) 31807c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31817c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31827c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31837c990728SSuraj Jitindar Singh rcu_read_unlock(); 31847c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31857c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31867c990728SSuraj Jitindar Singh if (old_groups) 31877c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3188117fff10STheodore Ts'o return 0; 3189117fff10STheodore Ts'o } 3190117fff10STheodore Ts'o 3191772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3192772cb7c8SJose R. Santos { 3193772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3194772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31957c990728SSuraj Jitindar Singh struct flex_groups *fg; 3196772cb7c8SJose R. Santos ext4_group_t flex_group; 3197117fff10STheodore Ts'o int i, err; 3198772cb7c8SJose R. Santos 3199503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3200d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3201772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3202772cb7c8SJose R. Santos return 1; 3203772cb7c8SJose R. Santos } 3204772cb7c8SJose R. Santos 3205117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3206117fff10STheodore Ts'o if (err) 3207772cb7c8SJose R. Santos goto failed; 3208772cb7c8SJose R. Santos 3209772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 321088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3211772cb7c8SJose R. Santos 3212772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 32137c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 32147c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 321590ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 32167c990728SSuraj Jitindar Singh &fg->free_clusters); 32177c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3218772cb7c8SJose R. Santos } 3219772cb7c8SJose R. Santos 3220772cb7c8SJose R. Santos return 1; 3221772cb7c8SJose R. Santos failed: 3222772cb7c8SJose R. Santos return 0; 3223772cb7c8SJose R. Santos } 3224772cb7c8SJose R. Santos 3225e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3226717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3227717d50e4SAndreas Dilger { 3228b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3229717d50e4SAndreas Dilger __u16 crc = 0; 3230717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3231e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3232717d50e4SAndreas Dilger 32339aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3234feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3235feb0ab32SDarrick J. Wong __u32 csum32; 3236b47820edSDaeho Jeong __u16 dummy_csum = 0; 3237feb0ab32SDarrick J. Wong 3238feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3239feb0ab32SDarrick J. Wong sizeof(le_group)); 3240b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3241b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3242b47820edSDaeho Jeong sizeof(dummy_csum)); 3243b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3244b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3245b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3246b47820edSDaeho Jeong sbi->s_desc_size - offset); 3247feb0ab32SDarrick J. Wong 3248feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3249feb0ab32SDarrick J. Wong goto out; 3250feb0ab32SDarrick J. Wong } 3251feb0ab32SDarrick J. Wong 3252feb0ab32SDarrick J. Wong /* old crc16 code */ 3253e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3254813d32f9SDarrick J. Wong return 0; 3255813d32f9SDarrick J. Wong 3256717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3257717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3258717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3259717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3260717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 32614f043518STudor Ambarus if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size) 3262717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 32634f043518STudor Ambarus sbi->s_desc_size - offset); 3264717d50e4SAndreas Dilger 3265feb0ab32SDarrick J. Wong out: 3266717d50e4SAndreas Dilger return cpu_to_le16(crc); 3267717d50e4SAndreas Dilger } 3268717d50e4SAndreas Dilger 3269feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3270717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3271717d50e4SAndreas Dilger { 3272feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3273e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3274717d50e4SAndreas Dilger return 0; 3275717d50e4SAndreas Dilger 3276717d50e4SAndreas Dilger return 1; 3277717d50e4SAndreas Dilger } 3278717d50e4SAndreas Dilger 3279feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3280feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3281feb0ab32SDarrick J. Wong { 3282feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3283feb0ab32SDarrick J. Wong return; 3284e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3285feb0ab32SDarrick J. Wong } 3286feb0ab32SDarrick J. Wong 3287ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3288bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3289829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3290bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3291ac27a0ecSDave Kleikamp { 3292617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3293617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3294617ba13bSMingming Cao ext4_fsblk_t last_block; 329544de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3296bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3297bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3298bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3299ce421581SJose R. Santos int flexbg_flag = 0; 3300bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3301ac27a0ecSDave Kleikamp 3302e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3303ce421581SJose R. Santos flexbg_flag = 1; 3304ce421581SJose R. Santos 3305617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3306ac27a0ecSDave Kleikamp 3307197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3308197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3309197cd65aSAkinobu Mita 3310ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3311bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3312ac27a0ecSDave Kleikamp else 3313ac27a0ecSDave Kleikamp last_block = first_block + 3314617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3315ac27a0ecSDave Kleikamp 3316bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3317bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3318bfff6873SLukas Czerner grp = i; 3319bfff6873SLukas Czerner 33208fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3321829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3322829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3323829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3324829fa70dSTheodore Ts'o "superblock", i); 332518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 332618db4b4eSTheodore Ts'o return 0; 3327829fa70dSTheodore Ts'o } 332877260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 332977260807STheodore Ts'o block_bitmap <= last_bg_block) { 333077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 333177260807STheodore Ts'o "Block bitmap for group %u overlaps " 333277260807STheodore Ts'o "block group descriptors", i); 333377260807STheodore Ts'o if (!sb_rdonly(sb)) 333477260807STheodore Ts'o return 0; 333577260807STheodore Ts'o } 33362b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3338a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3339b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3340ac27a0ecSDave Kleikamp return 0; 3341ac27a0ecSDave Kleikamp } 33428fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3343829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3344829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3345829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3346829fa70dSTheodore Ts'o "superblock", i); 334718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 334818db4b4eSTheodore Ts'o return 0; 3349829fa70dSTheodore Ts'o } 335077260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 335177260807STheodore Ts'o inode_bitmap <= last_bg_block) { 335277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335377260807STheodore Ts'o "Inode bitmap for group %u overlaps " 335477260807STheodore Ts'o "block group descriptors", i); 335577260807STheodore Ts'o if (!sb_rdonly(sb)) 335677260807STheodore Ts'o return 0; 335777260807STheodore Ts'o } 33582b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3360a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3361b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3362ac27a0ecSDave Kleikamp return 0; 3363ac27a0ecSDave Kleikamp } 33648fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3365829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3366829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3367829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3368829fa70dSTheodore Ts'o "superblock", i); 336918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 337018db4b4eSTheodore Ts'o return 0; 3371829fa70dSTheodore Ts'o } 337277260807STheodore Ts'o if (inode_table >= sb_block + 1 && 337377260807STheodore Ts'o inode_table <= last_bg_block) { 337477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 337577260807STheodore Ts'o "Inode table for group %u overlaps " 337677260807STheodore Ts'o "block group descriptors", i); 337777260807STheodore Ts'o if (!sb_rdonly(sb)) 337877260807STheodore Ts'o return 0; 337977260807STheodore Ts'o } 3380bd81d8eeSLaurent Vivier if (inode_table < first_block || 33812b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3382b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3383a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3384b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3385ac27a0ecSDave Kleikamp return 0; 3386ac27a0ecSDave Kleikamp } 3387955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3388feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3389b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3390b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3391e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3392fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3393bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3394955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3395717d50e4SAndreas Dilger return 0; 3396717d50e4SAndreas Dilger } 33977ee1ec4cSLi Zefan } 3398955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3399ce421581SJose R. Santos if (!flexbg_flag) 3400617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3401ac27a0ecSDave Kleikamp } 3402bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3403bfff6873SLukas Czerner *first_not_zeroed = grp; 3404ac27a0ecSDave Kleikamp return 1; 3405ac27a0ecSDave Kleikamp } 3406ac27a0ecSDave Kleikamp 3407cd2291a4SEric Sandeen /* 3408cd2291a4SEric Sandeen * Maximal extent format file size. 3409cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3410cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3411cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3412cd2291a4SEric Sandeen * so that won't be a limiting factor. 3413cd2291a4SEric Sandeen * 3414f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3415f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3416f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3417f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3418f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3419f17722f9SLukas Czerner * 3420cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3421cd2291a4SEric Sandeen */ 3422f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3423cd2291a4SEric Sandeen { 3424cd2291a4SEric Sandeen loff_t res; 3425cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3426cd2291a4SEric Sandeen 342772deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 342872deb455SChristoph Hellwig 342972deb455SChristoph Hellwig if (!has_huge_files) { 3430cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3431cd2291a4SEric Sandeen 3432cd2291a4SEric Sandeen /* total blocks in file system block size */ 3433cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3434cd2291a4SEric Sandeen upper_limit <<= blkbits; 3435cd2291a4SEric Sandeen } 3436cd2291a4SEric Sandeen 3437f17722f9SLukas Czerner /* 3438f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3439f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3440f17722f9SLukas Czerner * size 3441f17722f9SLukas Czerner */ 3442f17722f9SLukas Czerner res = (1LL << 32) - 1; 3443cd2291a4SEric Sandeen res <<= blkbits; 3444cd2291a4SEric Sandeen 3445cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3446cd2291a4SEric Sandeen if (res > upper_limit) 3447cd2291a4SEric Sandeen res = upper_limit; 3448cd2291a4SEric Sandeen 3449cd2291a4SEric Sandeen return res; 3450cd2291a4SEric Sandeen } 3451ac27a0ecSDave Kleikamp 3452ac27a0ecSDave Kleikamp /* 3453cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34540fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34550fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3456ac27a0ecSDave Kleikamp */ 3457f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3458ac27a0ecSDave Kleikamp { 34595c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34600fc1b451SAneesh Kumar K.V int meta_blocks; 34615c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 346275ca6ad4SRitesh Harjani 346375ca6ad4SRitesh Harjani /* 346475ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34650b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34660b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34670b8e58a1SAndreas Dilger * 34680b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34690b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34700fc1b451SAneesh Kumar K.V */ 347172deb455SChristoph Hellwig if (!has_huge_files) { 34720fc1b451SAneesh Kumar K.V /* 347372deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 347472deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 347572deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34760fc1b451SAneesh Kumar K.V */ 34770fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34780fc1b451SAneesh Kumar K.V 34790fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34800fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34810fc1b451SAneesh Kumar K.V 34820fc1b451SAneesh Kumar K.V } else { 34838180a562SAneesh Kumar K.V /* 34848180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34858180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34868180a562SAneesh Kumar K.V * represent total number of blocks in 34878180a562SAneesh Kumar K.V * file system block size 34888180a562SAneesh Kumar K.V */ 34890fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34900fc1b451SAneesh Kumar K.V 34910fc1b451SAneesh Kumar K.V } 34920fc1b451SAneesh Kumar K.V 34935c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34945c93e8ecSZhang Yi res += ppb; 34955c93e8ecSZhang Yi res += ppb * ppb; 34965c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34975c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34985c93e8ecSZhang Yi meta_blocks = 1; 34995c93e8ecSZhang Yi meta_blocks += 1 + ppb; 35005c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 35015c93e8ecSZhang Yi /* Does block tree limit file size? */ 35025c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 35035c93e8ecSZhang Yi goto check_lfs; 35045c93e8ecSZhang Yi 35055c93e8ecSZhang Yi res = upper_limit; 35065c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 35075c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 35080fc1b451SAneesh Kumar K.V /* indirect blocks */ 35090fc1b451SAneesh Kumar K.V meta_blocks = 1; 35105c93e8ecSZhang Yi upper_limit -= ppb; 35110fc1b451SAneesh Kumar K.V /* double indirect blocks */ 35125c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 35135c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 35145c93e8ecSZhang Yi res -= meta_blocks; 35155c93e8ecSZhang Yi goto check_lfs; 35165c93e8ecSZhang Yi } 35175c93e8ecSZhang Yi meta_blocks += 1 + ppb; 35185c93e8ecSZhang Yi upper_limit -= ppb * ppb; 35195c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 35205c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 35215c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 35225c93e8ecSZhang Yi res -= meta_blocks; 35235c93e8ecSZhang Yi check_lfs: 3524ac27a0ecSDave Kleikamp res <<= bits; 35250fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35260fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35270fc1b451SAneesh Kumar K.V 35285c93e8ecSZhang Yi return res; 3529ac27a0ecSDave Kleikamp } 3530ac27a0ecSDave Kleikamp 3531617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 353270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3533ac27a0ecSDave Kleikamp { 3534617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3535fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3536ac27a0ecSDave Kleikamp int has_super = 0; 3537ac27a0ecSDave Kleikamp 3538ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3539ac27a0ecSDave Kleikamp 3540e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 354170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3542ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3543617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3544ac27a0ecSDave Kleikamp has_super = 1; 35450b8e58a1SAndreas Dilger 3546bd63f6b0SDarrick J. Wong /* 3547bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3548bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3549bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3550bd63f6b0SDarrick J. Wong * compensate. 3551bd63f6b0SDarrick J. Wong */ 3552bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 355349598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3554bd63f6b0SDarrick J. Wong has_super++; 3555bd63f6b0SDarrick J. Wong 3556617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3557ac27a0ecSDave Kleikamp } 3558ac27a0ecSDave Kleikamp 3559c9de560dSAlex Tomas /** 3560c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3561c9de560dSAlex Tomas * @sbi: In memory super block info 3562c9de560dSAlex Tomas * 3563c9de560dSAlex Tomas * If we have specified it via mount option, then 3564c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3565c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3566c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3567c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3568c9de560dSAlex Tomas * 3569c9de560dSAlex Tomas */ 3570c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3571c9de560dSAlex Tomas { 3572c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3573c9de560dSAlex Tomas unsigned long stripe_width = 3574c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35753eb08658SDan Ehrenberg int ret; 3576c9de560dSAlex Tomas 3577c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35783eb08658SDan Ehrenberg ret = sbi->s_stripe; 35795469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35803eb08658SDan Ehrenberg ret = stripe_width; 35815469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35823eb08658SDan Ehrenberg ret = stride; 35833eb08658SDan Ehrenberg else 35843eb08658SDan Ehrenberg ret = 0; 3585c9de560dSAlex Tomas 35863eb08658SDan Ehrenberg /* 35873eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35883eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35893eb08658SDan Ehrenberg */ 35903eb08658SDan Ehrenberg if (ret <= 1) 35913eb08658SDan Ehrenberg ret = 0; 3592c9de560dSAlex Tomas 35933eb08658SDan Ehrenberg return ret; 3594c9de560dSAlex Tomas } 3595ac27a0ecSDave Kleikamp 3596a13fb1a4SEric Sandeen /* 3597a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3598a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3599a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3600a13fb1a4SEric Sandeen * 0 if it cannot be. 3601a13fb1a4SEric Sandeen */ 360225c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3603a13fb1a4SEric Sandeen { 3604e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3605a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3606a13fb1a4SEric Sandeen "Couldn't mount because of " 3607a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3608a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3609a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3610a13fb1a4SEric Sandeen return 0; 3611a13fb1a4SEric Sandeen } 3612a13fb1a4SEric Sandeen 36135298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3614c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3615c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3616c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3617c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3618c83ad55eSGabriel Krisman Bertazi return 0; 3619c83ad55eSGabriel Krisman Bertazi } 3620c83ad55eSGabriel Krisman Bertazi #endif 3621c83ad55eSGabriel Krisman Bertazi 3622a13fb1a4SEric Sandeen if (readonly) 3623a13fb1a4SEric Sandeen return 1; 3624a13fb1a4SEric Sandeen 3625e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36262cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36271751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36282cb5cc8bSDarrick J. Wong return 1; 36292cb5cc8bSDarrick J. Wong } 36302cb5cc8bSDarrick J. Wong 3631a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3632e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3633a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3634a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3635a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3636a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3637a13fb1a4SEric Sandeen return 0; 3638a13fb1a4SEric Sandeen } 3639e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3640bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3641bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3642bab08ab9STheodore Ts'o "extents feature\n"); 3643bab08ab9STheodore Ts'o return 0; 3644bab08ab9STheodore Ts'o } 36457c319d32SAditya Kali 36469db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3647d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3648d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36497c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3650d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3651689c958cSLi Xi return 0; 3652689c958cSLi Xi } 36537c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3654a13fb1a4SEric Sandeen return 1; 3655a13fb1a4SEric Sandeen } 3656a13fb1a4SEric Sandeen 365766e61a9eSTheodore Ts'o /* 365866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 365966e61a9eSTheodore Ts'o * on the file system 366066e61a9eSTheodore Ts'o */ 3661235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 366266e61a9eSTheodore Ts'o { 3663235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3664235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3665235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 366666e61a9eSTheodore Ts'o 366766e61a9eSTheodore Ts'o if (es->s_error_count) 3668ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3669ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 367066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 367166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36726a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36736a0678a7SArnd Bergmann sb->s_id, 36746a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 367566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 367666e61a9eSTheodore Ts'o es->s_first_error_func, 367766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 367866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3679651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 368066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 368166e61a9eSTheodore Ts'o if (es->s_first_error_block) 3682651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 368366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3684651e1c3bSJoe Perches printk(KERN_CONT "\n"); 368566e61a9eSTheodore Ts'o } 368666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36876a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36886a0678a7SArnd Bergmann sb->s_id, 36896a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 369066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 369166e61a9eSTheodore Ts'o es->s_last_error_func, 369266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 369366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3694651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 369566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 369666e61a9eSTheodore Ts'o if (es->s_last_error_block) 3697651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 369866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3699651e1c3bSJoe Perches printk(KERN_CONT "\n"); 370066e61a9eSTheodore Ts'o } 370166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 370266e61a9eSTheodore Ts'o } 370366e61a9eSTheodore Ts'o 3704bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3705bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3706bfff6873SLukas Czerner { 3707bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 37083d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 37093d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 37103d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 37113d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3712bfff6873SLukas Czerner int ret = 0; 37134f3d1e45SOjaswin Mujoo int nr = EXT4_SB(sb)->s_mb_prefetch; 371439fec688SShaoying Xu u64 start_time; 3715bfff6873SLukas Czerner 37163d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37174f3d1e45SOjaswin Mujoo elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios); 37184f3d1e45SOjaswin Mujoo ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr); 37194f3d1e45SOjaswin Mujoo trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr); 37203d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37213d392b26STheodore Ts'o ret = 1; 37223d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37233d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37243d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37253d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37263d392b26STheodore Ts'o ret = 0; 37273d392b26STheodore Ts'o } 37283d392b26STheodore Ts'o } 37293d392b26STheodore Ts'o return ret; 37303d392b26STheodore Ts'o } 3731bfff6873SLukas Czerner 37323d392b26STheodore Ts'o for (; group < ngroups; group++) { 3733bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3734bfff6873SLukas Czerner if (!gdp) { 3735bfff6873SLukas Czerner ret = 1; 3736bfff6873SLukas Czerner break; 3737bfff6873SLukas Czerner } 3738bfff6873SLukas Czerner 3739bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3740bfff6873SLukas Czerner break; 3741bfff6873SLukas Czerner } 3742bfff6873SLukas Czerner 37437f511862STheodore Ts'o if (group >= ngroups) 3744bfff6873SLukas Czerner ret = 1; 3745bfff6873SLukas Czerner 3746bfff6873SLukas Czerner if (!ret) { 374739fec688SShaoying Xu start_time = ktime_get_real_ns(); 3748bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3749bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37503d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3751bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 375239fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 375339fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3754bfff6873SLukas Czerner } 3755bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3756bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3757bfff6873SLukas Czerner } 3758bfff6873SLukas Czerner return ret; 3759bfff6873SLukas Czerner } 3760bfff6873SLukas Czerner 3761bfff6873SLukas Czerner /* 3762bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37634ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3764bfff6873SLukas Czerner */ 3765bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3766bfff6873SLukas Czerner { 3767bfff6873SLukas Czerner if (!elr) 3768bfff6873SLukas Czerner return; 3769bfff6873SLukas Czerner 3770bfff6873SLukas Czerner list_del(&elr->lr_request); 37713d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3772bfff6873SLukas Czerner kfree(elr); 3773bfff6873SLukas Czerner } 3774bfff6873SLukas Czerner 3775bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3776bfff6873SLukas Czerner { 37771bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37781bb933fbSLukas Czerner if (!ext4_li_info) { 37791bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3780bfff6873SLukas Czerner return; 37811bb933fbSLukas Czerner } 3782bfff6873SLukas Czerner 3783bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37841bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3785bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37861bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3787bfff6873SLukas Czerner } 3788bfff6873SLukas Czerner 37898f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37908f1f7453SEric Sandeen 3791bfff6873SLukas Czerner /* 3792bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3793bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3794bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3795bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3796bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3797bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3798bfff6873SLukas Czerner * next waking time and put itself into sleep. 3799bfff6873SLukas Czerner */ 3800bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3801bfff6873SLukas Czerner { 3802c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3803bfff6873SLukas Czerner struct list_head *pos, *n; 3804bfff6873SLukas Czerner struct ext4_li_request *elr; 38054ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3806bfff6873SLukas Czerner 3807bfff6873SLukas Czerner BUG_ON(NULL == eli); 38083b575495SLalith Rajendran set_freezable(); 3809bfff6873SLukas Czerner 3810bfff6873SLukas Czerner cont_thread: 3811bfff6873SLukas Czerner while (true) { 3812bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3813bfff6873SLukas Czerner 3814bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3815bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3816bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3817bfff6873SLukas Czerner goto exit_thread; 3818bfff6873SLukas Czerner } 3819bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3820e22834f0SDmitry Monakhov int err = 0; 3821e22834f0SDmitry Monakhov int progress = 0; 3822bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3823bfff6873SLukas Czerner lr_request); 3824bfff6873SLukas Czerner 3825e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3826e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3827e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3828e22834f0SDmitry Monakhov continue; 3829e22834f0SDmitry Monakhov } 3830e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3831e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3832e22834f0SDmitry Monakhov progress = 1; 3833e22834f0SDmitry Monakhov /* 3834e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3835e22834f0SDmitry Monakhov * be removed from the list, it is 3836e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3837e22834f0SDmitry Monakhov */ 3838e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3839e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3840e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3841e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3842e22834f0SDmitry Monakhov n = pos->next; 3843e22834f0SDmitry Monakhov } 3844e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3845e22834f0SDmitry Monakhov } 3846b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3847e22834f0SDmitry Monakhov if (err) { 3848bfff6873SLukas Czerner ext4_remove_li_request(elr); 3849bfff6873SLukas Czerner continue; 3850bfff6873SLukas Czerner } 3851e22834f0SDmitry Monakhov if (!progress) { 3852e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 38538032bf12SJason A. Donenfeld get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3854b2c78cd0STheodore Ts'o } 3855bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3856bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3857bfff6873SLukas Czerner } 3858bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3859bfff6873SLukas Czerner 3860a0acae0eSTejun Heo try_to_freeze(); 3861bfff6873SLukas Czerner 38624ed5c033SLukas Czerner cur = jiffies; 38634ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3864f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3865bfff6873SLukas Czerner cond_resched(); 3866bfff6873SLukas Czerner continue; 3867bfff6873SLukas Czerner } 3868bfff6873SLukas Czerner 38694ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38704ed5c033SLukas Czerner 38718f1f7453SEric Sandeen if (kthread_should_stop()) { 38728f1f7453SEric Sandeen ext4_clear_request_list(); 38738f1f7453SEric Sandeen goto exit_thread; 38748f1f7453SEric Sandeen } 3875bfff6873SLukas Czerner } 3876bfff6873SLukas Czerner 3877bfff6873SLukas Czerner exit_thread: 3878bfff6873SLukas Czerner /* 3879bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3880bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3881bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3882bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3883bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3884bfff6873SLukas Czerner * new one. 3885bfff6873SLukas Czerner */ 3886bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3887bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3888bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3889bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3890bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3891bfff6873SLukas Czerner goto cont_thread; 3892bfff6873SLukas Czerner } 3893bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3894bfff6873SLukas Czerner kfree(ext4_li_info); 3895bfff6873SLukas Czerner ext4_li_info = NULL; 3896bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3897bfff6873SLukas Czerner 3898bfff6873SLukas Czerner return 0; 3899bfff6873SLukas Czerner } 3900bfff6873SLukas Czerner 3901bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3902bfff6873SLukas Czerner { 3903bfff6873SLukas Czerner struct list_head *pos, *n; 3904bfff6873SLukas Czerner struct ext4_li_request *elr; 3905bfff6873SLukas Czerner 3906bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3907bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3908bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3909bfff6873SLukas Czerner lr_request); 3910bfff6873SLukas Czerner ext4_remove_li_request(elr); 3911bfff6873SLukas Czerner } 3912bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3913bfff6873SLukas Czerner } 3914bfff6873SLukas Czerner 3915bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3916bfff6873SLukas Czerner { 39178f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39188f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39198f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39208f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3921bfff6873SLukas Czerner ext4_clear_request_list(); 3922bfff6873SLukas Czerner kfree(ext4_li_info); 3923bfff6873SLukas Czerner ext4_li_info = NULL; 392492b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3925bfff6873SLukas Czerner "initialization thread\n", 3926bfff6873SLukas Czerner err); 3927bfff6873SLukas Czerner return err; 3928bfff6873SLukas Czerner } 3929bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3930bfff6873SLukas Czerner return 0; 3931bfff6873SLukas Czerner } 3932bfff6873SLukas Czerner 3933bfff6873SLukas Czerner /* 3934bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3935bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3936bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3937bfff6873SLukas Czerner * groups and return total number of groups. 3938bfff6873SLukas Czerner */ 3939bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3940bfff6873SLukas Czerner { 3941bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3942bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3943bfff6873SLukas Czerner 39448844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39458844618dSTheodore Ts'o return ngroups; 39468844618dSTheodore Ts'o 3947bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3948bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3949bfff6873SLukas Czerner if (!gdp) 3950bfff6873SLukas Czerner continue; 3951bfff6873SLukas Czerner 395250122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3953bfff6873SLukas Czerner break; 3954bfff6873SLukas Czerner } 3955bfff6873SLukas Czerner 3956bfff6873SLukas Czerner return group; 3957bfff6873SLukas Czerner } 3958bfff6873SLukas Czerner 3959bfff6873SLukas Czerner static int ext4_li_info_new(void) 3960bfff6873SLukas Czerner { 3961bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3962bfff6873SLukas Czerner 3963bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3964bfff6873SLukas Czerner if (!eli) 3965bfff6873SLukas Czerner return -ENOMEM; 3966bfff6873SLukas Czerner 3967bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3968bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3969bfff6873SLukas Czerner 3970bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3971bfff6873SLukas Czerner 3972bfff6873SLukas Czerner ext4_li_info = eli; 3973bfff6873SLukas Czerner 3974bfff6873SLukas Czerner return 0; 3975bfff6873SLukas Czerner } 3976bfff6873SLukas Czerner 3977bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3978bfff6873SLukas Czerner ext4_group_t start) 3979bfff6873SLukas Czerner { 3980bfff6873SLukas Czerner struct ext4_li_request *elr; 3981bfff6873SLukas Czerner 3982bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3983bfff6873SLukas Czerner if (!elr) 3984bfff6873SLukas Czerner return NULL; 3985bfff6873SLukas Czerner 3986bfff6873SLukas Czerner elr->lr_super = sb; 39873d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 398821175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39893d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3990bfff6873SLukas Czerner elr->lr_next_group = start; 399121175ca4SHarshad Shirwadkar } else { 399221175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39933d392b26STheodore Ts'o } 3994bfff6873SLukas Czerner 3995bfff6873SLukas Czerner /* 3996bfff6873SLukas Czerner * Randomize first schedule time of the request to 3997bfff6873SLukas Czerner * spread the inode table initialization requests 3998bfff6873SLukas Czerner * better. 3999bfff6873SLukas Czerner */ 40008032bf12SJason A. Donenfeld elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 4001bfff6873SLukas Czerner return elr; 4002bfff6873SLukas Czerner } 4003bfff6873SLukas Czerner 40047f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 4005bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 4006bfff6873SLukas Czerner { 4007bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 40087f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 400949598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 40106c5a6cb9SAndrew Morton int ret = 0; 4011bfff6873SLukas Czerner 40127f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 401351ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 401451ce6511SLukas Czerner /* 401551ce6511SLukas Czerner * Reset timeout so it can be computed again, because 401651ce6511SLukas Czerner * s_li_wait_mult might have changed. 401751ce6511SLukas Czerner */ 401851ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40197f511862STheodore Ts'o goto out; 402051ce6511SLukas Czerner } 4021bfff6873SLukas Czerner 4022426d15adSJosh Triplett if (sb_rdonly(sb) || 4023426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 4024426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 40257f511862STheodore Ts'o goto out; 4026bfff6873SLukas Czerner 4027bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40287f511862STheodore Ts'o if (!elr) { 40297f511862STheodore Ts'o ret = -ENOMEM; 40307f511862STheodore Ts'o goto out; 40317f511862STheodore Ts'o } 4032bfff6873SLukas Czerner 4033bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4034bfff6873SLukas Czerner ret = ext4_li_info_new(); 4035bfff6873SLukas Czerner if (ret) 4036bfff6873SLukas Czerner goto out; 4037bfff6873SLukas Czerner } 4038bfff6873SLukas Czerner 4039bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4040bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4041bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4042bfff6873SLukas Czerner 4043bfff6873SLukas Czerner sbi->s_li_request = elr; 404446e4690bSTao Ma /* 404546e4690bSTao Ma * set elr to NULL here since it has been inserted to 404646e4690bSTao Ma * the request_list and the removal and free of it is 404746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 404846e4690bSTao Ma */ 404946e4690bSTao Ma elr = NULL; 4050bfff6873SLukas Czerner 4051bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4052bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4053bfff6873SLukas Czerner if (ret) 4054bfff6873SLukas Czerner goto out; 4055bfff6873SLukas Czerner } 4056bfff6873SLukas Czerner out: 4057bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4058beed5ecbSNicolas Kaiser if (ret) 4059bfff6873SLukas Czerner kfree(elr); 4060bfff6873SLukas Czerner return ret; 4061bfff6873SLukas Czerner } 4062bfff6873SLukas Czerner 4063bfff6873SLukas Czerner /* 4064bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4065bfff6873SLukas Czerner * module unload. 4066bfff6873SLukas Czerner */ 4067bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4068bfff6873SLukas Czerner { 4069bfff6873SLukas Czerner /* 4070bfff6873SLukas Czerner * If thread exited earlier 4071bfff6873SLukas Czerner * there's nothing to be done. 4072bfff6873SLukas Czerner */ 40738f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4074bfff6873SLukas Czerner return; 4075bfff6873SLukas Czerner 40768f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4077bfff6873SLukas Czerner } 4078bfff6873SLukas Czerner 407925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 408025ed6e8aSDarrick J. Wong { 408125ed6e8aSDarrick J. Wong int ret = 1; 408225ed6e8aSDarrick J. Wong int compat, incompat; 408325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 408425ed6e8aSDarrick J. Wong 40859aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4086db9ee220SDarrick J. Wong /* journal checksum v3 */ 408725ed6e8aSDarrick J. Wong compat = 0; 4088db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 408925ed6e8aSDarrick J. Wong } else { 409025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 409125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 409225ed6e8aSDarrick J. Wong incompat = 0; 409325ed6e8aSDarrick J. Wong } 409425ed6e8aSDarrick J. Wong 4095feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4096feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4097feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4098feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 409925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 410025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 410125ed6e8aSDarrick J. Wong compat, 0, 410225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 410325ed6e8aSDarrick J. Wong incompat); 410425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 410525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 410625ed6e8aSDarrick J. Wong compat, 0, 410725ed6e8aSDarrick J. Wong incompat); 410825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 410925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 411025ed6e8aSDarrick J. Wong } else { 4111feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4112feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 411325ed6e8aSDarrick J. Wong } 411425ed6e8aSDarrick J. Wong 411525ed6e8aSDarrick J. Wong return ret; 411625ed6e8aSDarrick J. Wong } 411725ed6e8aSDarrick J. Wong 4118952fc18eSTheodore Ts'o /* 4119952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4120952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4121952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4122952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4123952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4124952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4125952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4126952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4127952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4128952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4129952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4130952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4131952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4132952fc18eSTheodore Ts'o */ 4133952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4134952fc18eSTheodore Ts'o char *buf) 4135952fc18eSTheodore Ts'o { 4136952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4137952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4138952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4139952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4140952fc18eSTheodore Ts'o int s, j, count = 0; 414110b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4142952fc18eSTheodore Ts'o 4143e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 414410b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 414510b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41460548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41470548bbb8STheodore Ts'o 4148952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4149952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4150952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4151952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4152952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4153952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4154952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4155952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4156952fc18eSTheodore Ts'o count++; 4157952fc18eSTheodore Ts'o } 4158952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4159952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4160952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4161952fc18eSTheodore Ts'o count++; 4162952fc18eSTheodore Ts'o } 4163952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4164952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4165952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4166952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4167952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4168952fc18eSTheodore Ts'o count++; 4169952fc18eSTheodore Ts'o } 4170952fc18eSTheodore Ts'o if (i != grp) 4171952fc18eSTheodore Ts'o continue; 4172952fc18eSTheodore Ts'o s = 0; 4173952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4174952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4175952fc18eSTheodore Ts'o count++; 4176952fc18eSTheodore Ts'o } 4177c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4178c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4179c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4180c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4181c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4182952fc18eSTheodore Ts'o } 4183c48ae41bSTheodore Ts'o count += j; 4184c48ae41bSTheodore Ts'o for (; j > 0; j--) 4185c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4186952fc18eSTheodore Ts'o } 4187952fc18eSTheodore Ts'o if (!count) 4188952fc18eSTheodore Ts'o return 0; 4189952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4190952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4191952fc18eSTheodore Ts'o } 4192952fc18eSTheodore Ts'o 4193952fc18eSTheodore Ts'o /* 4194952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4195952fc18eSTheodore Ts'o */ 4196952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4197952fc18eSTheodore Ts'o { 4198952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4199952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 42003c816dedSEric Whitney struct inode *j_inode; 42013c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4202952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4203952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 42044fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4205952fc18eSTheodore Ts'o 4206952fc18eSTheodore Ts'o if (!buf) 4207952fc18eSTheodore Ts'o return -ENOMEM; 4208952fc18eSTheodore Ts'o 4209952fc18eSTheodore Ts'o /* 4210952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4211952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4212952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4213952fc18eSTheodore Ts'o */ 4214952fc18eSTheodore Ts'o 4215952fc18eSTheodore Ts'o /* 4216952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4217952fc18eSTheodore Ts'o */ 4218952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4219952fc18eSTheodore Ts'o 4220952fc18eSTheodore Ts'o /* 4221952fc18eSTheodore Ts'o * Add the overhead found in each block group 4222952fc18eSTheodore Ts'o */ 4223952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4224952fc18eSTheodore Ts'o int blks; 4225952fc18eSTheodore Ts'o 4226952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4227952fc18eSTheodore Ts'o overhead += blks; 4228952fc18eSTheodore Ts'o if (blks) 4229952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4230952fc18eSTheodore Ts'o cond_resched(); 4231952fc18eSTheodore Ts'o } 42323c816dedSEric Whitney 42333c816dedSEric Whitney /* 42343c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42353c816dedSEric Whitney * loaded or not 42363c816dedSEric Whitney */ 4237ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4238ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4239f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4240f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42413c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 4242ee5c8071SZhang Yi if (!IS_ERR(j_inode)) { 42433c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42443c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42453c816dedSEric Whitney iput(j_inode); 42463c816dedSEric Whitney } else { 42473c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42483c816dedSEric Whitney } 42493c816dedSEric Whitney } 4250952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4251952fc18eSTheodore Ts'o smp_wmb(); 4252952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4253952fc18eSTheodore Ts'o return 0; 4254952fc18eSTheodore Ts'o } 4255952fc18eSTheodore Ts'o 4256b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 425727dd4385SLukas Czerner { 425827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4259b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 426027dd4385SLukas Czerner 426127dd4385SLukas Czerner /* 426230fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 426330fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 426430fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 426530fac0f7SJan Kara * to keep ext2/3 backward compatibility. 426630fac0f7SJan Kara */ 4267e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4268b5799018STheodore Ts'o return; 426930fac0f7SJan Kara /* 427027dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 427127dd4385SLukas Czerner * This should cover the situations where we can not afford to run 427227dd4385SLukas Czerner * out of space like for example punch hole, or converting 4273556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 427427dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 427527dd4385SLukas Czerner * very rare. 427627dd4385SLukas Czerner */ 4277b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4278b5799018STheodore Ts'o sbi->s_cluster_bits); 427927dd4385SLukas Czerner 428027dd4385SLukas Czerner do_div(resv_clusters, 50); 428127dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 428227dd4385SLukas Czerner 4283b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 428427dd4385SLukas Czerner } 428527dd4385SLukas Czerner 4286ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4287ca9b404fSRoman Anufriev { 4288ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4289ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4290ca9b404fSRoman Anufriev return "none"; 4291ca9b404fSRoman Anufriev 4292ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4293ca9b404fSRoman Anufriev return "journalled"; 4294ca9b404fSRoman Anufriev else 4295ca9b404fSRoman Anufriev return "writeback"; 4296ca9b404fSRoman Anufriev #else 4297ca9b404fSRoman Anufriev return "disabled"; 4298ca9b404fSRoman Anufriev #endif 4299ca9b404fSRoman Anufriev } 4300ca9b404fSRoman Anufriev 4301188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4302188c299eSJan Kara enum ext4_journal_trigger_type type, 4303188c299eSJan Kara void (*trigger)( 4304188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4305188c299eSJan Kara struct buffer_head *bh, 4306188c299eSJan Kara void *mapped_data, 4307188c299eSJan Kara size_t size)) 4308188c299eSJan Kara { 4309188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4310188c299eSJan Kara 4311188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4312188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4313188c299eSJan Kara } 4314188c299eSJan Kara 43157edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4316ac27a0ecSDave Kleikamp { 43177edfd85bSLukas Czerner if (!sbi) 43187edfd85bSLukas Czerner return; 43197edfd85bSLukas Czerner 43207edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43218012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43227edfd85bSLukas Czerner kfree(sbi); 43237edfd85bSLukas Czerner } 43247edfd85bSLukas Czerner 43257edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43267edfd85bSLukas Czerner { 43277edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43287edfd85bSLukas Czerner 43297edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43307edfd85bSLukas Czerner if (!sbi) 43317edfd85bSLukas Czerner return NULL; 43327edfd85bSLukas Czerner 43338012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 43348012b866SShiyang Ruan NULL, NULL); 43357edfd85bSLukas Czerner 43367edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43377edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43387edfd85bSLukas Czerner 43397edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43407edfd85bSLukas Czerner goto err_out; 43417edfd85bSLukas Czerner 43427edfd85bSLukas Czerner sb->s_fs_info = sbi; 43437edfd85bSLukas Czerner sbi->s_sb = sb; 43447edfd85bSLukas Czerner return sbi; 43457edfd85bSLukas Czerner err_out: 43468012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43477edfd85bSLukas Czerner kfree(sbi); 43487edfd85bSLukas Czerner return NULL; 43497edfd85bSLukas Czerner } 43507edfd85bSLukas Czerner 43515f6d662dSJason Yan static void ext4_set_def_opts(struct super_block *sb, 43525f6d662dSJason Yan struct ext4_super_block *es) 43535f6d662dSJason Yan { 43545f6d662dSJason Yan unsigned long def_mount_opts; 43555f6d662dSJason Yan 43565f6d662dSJason Yan /* Set defaults before we parse the mount options */ 43575f6d662dSJason Yan def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 43585f6d662dSJason Yan set_opt(sb, INIT_INODE_TABLE); 43595f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DEBUG) 43605f6d662dSJason Yan set_opt(sb, DEBUG); 43615f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 43625f6d662dSJason Yan set_opt(sb, GRPID); 43635f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_UID16) 43645f6d662dSJason Yan set_opt(sb, NO_UID32); 43655f6d662dSJason Yan /* xattr user namespace & acls are now defaulted on */ 43665f6d662dSJason Yan set_opt(sb, XATTR_USER); 43675f6d662dSJason Yan #ifdef CONFIG_EXT4_FS_POSIX_ACL 43685f6d662dSJason Yan set_opt(sb, POSIX_ACL); 43695f6d662dSJason Yan #endif 43705f6d662dSJason Yan if (ext4_has_feature_fast_commit(sb)) 43715f6d662dSJason Yan set_opt2(sb, JOURNAL_FAST_COMMIT); 43725f6d662dSJason Yan /* don't forget to enable journal_csum when metadata_csum is enabled. */ 43735f6d662dSJason Yan if (ext4_has_metadata_csum(sb)) 43745f6d662dSJason Yan set_opt(sb, JOURNAL_CHECKSUM); 43755f6d662dSJason Yan 43765f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 43775f6d662dSJason Yan set_opt(sb, JOURNAL_DATA); 43785f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 43795f6d662dSJason Yan set_opt(sb, ORDERED_DATA); 43805f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 43815f6d662dSJason Yan set_opt(sb, WRITEBACK_DATA); 43825f6d662dSJason Yan 43835f6d662dSJason Yan if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) 43845f6d662dSJason Yan set_opt(sb, ERRORS_PANIC); 43855f6d662dSJason Yan else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) 43865f6d662dSJason Yan set_opt(sb, ERRORS_CONT); 43875f6d662dSJason Yan else 43885f6d662dSJason Yan set_opt(sb, ERRORS_RO); 43895f6d662dSJason Yan /* block_validity enabled by default; disable with noblock_validity */ 43905f6d662dSJason Yan set_opt(sb, BLOCK_VALIDITY); 43915f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DISCARD) 43925f6d662dSJason Yan set_opt(sb, DISCARD); 43935f6d662dSJason Yan 43945f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 43955f6d662dSJason Yan set_opt(sb, BARRIER); 43965f6d662dSJason Yan 43975f6d662dSJason Yan /* 43985f6d662dSJason Yan * enable delayed allocation by default 43995f6d662dSJason Yan * Use -o nodelalloc to turn it off 44005f6d662dSJason Yan */ 44015f6d662dSJason Yan if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 44025f6d662dSJason Yan ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 44035f6d662dSJason Yan set_opt(sb, DELALLOC); 44043df11e27SJason Yan 44053df11e27SJason Yan if (sb->s_blocksize == PAGE_SIZE) 44063df11e27SJason Yan set_opt(sb, DIOREAD_NOLOCK); 44075f6d662dSJason Yan } 44085f6d662dSJason Yan 4409c8267c51SJason Yan static int ext4_handle_clustersize(struct super_block *sb) 44104a8557b0SJason Yan { 44114a8557b0SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44124a8557b0SJason Yan struct ext4_super_block *es = sbi->s_es; 44134a8557b0SJason Yan int clustersize; 44144a8557b0SJason Yan 44154a8557b0SJason Yan /* Handle clustersize */ 44164a8557b0SJason Yan clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 44174a8557b0SJason Yan if (ext4_has_feature_bigalloc(sb)) { 4418c8267c51SJason Yan if (clustersize < sb->s_blocksize) { 44194a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44204a8557b0SJason Yan "cluster size (%d) smaller than " 4421c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44224a8557b0SJason Yan return -EINVAL; 44234a8557b0SJason Yan } 44244a8557b0SJason Yan sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 44254a8557b0SJason Yan le32_to_cpu(es->s_log_block_size); 44264a8557b0SJason Yan sbi->s_clusters_per_group = 44274a8557b0SJason Yan le32_to_cpu(es->s_clusters_per_group); 4428c8267c51SJason Yan if (sbi->s_clusters_per_group > sb->s_blocksize * 8) { 44294a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44304a8557b0SJason Yan "#clusters per group too big: %lu", 44314a8557b0SJason Yan sbi->s_clusters_per_group); 44324a8557b0SJason Yan return -EINVAL; 44334a8557b0SJason Yan } 44344a8557b0SJason Yan if (sbi->s_blocks_per_group != 4435c8267c51SJason Yan (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) { 44364a8557b0SJason Yan ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 44374a8557b0SJason Yan "clusters per group (%lu) inconsistent", 44384a8557b0SJason Yan sbi->s_blocks_per_group, 44394a8557b0SJason Yan sbi->s_clusters_per_group); 44404a8557b0SJason Yan return -EINVAL; 44414a8557b0SJason Yan } 44424a8557b0SJason Yan } else { 4443c8267c51SJason Yan if (clustersize != sb->s_blocksize) { 44444a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44454a8557b0SJason Yan "fragment/cluster size (%d) != " 4446c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44474a8557b0SJason Yan return -EINVAL; 44484a8557b0SJason Yan } 4449c8267c51SJason Yan if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { 44504a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44514a8557b0SJason Yan "#blocks per group too big: %lu", 44524a8557b0SJason Yan sbi->s_blocks_per_group); 44534a8557b0SJason Yan return -EINVAL; 44544a8557b0SJason Yan } 44554a8557b0SJason Yan sbi->s_clusters_per_group = sbi->s_blocks_per_group; 44564a8557b0SJason Yan sbi->s_cluster_bits = 0; 44574a8557b0SJason Yan } 4458c8267c51SJason Yan sbi->s_cluster_ratio = clustersize / sb->s_blocksize; 44594a8557b0SJason Yan 44604a8557b0SJason Yan /* Do we have standard group size of clustersize * 8 blocks ? */ 44614a8557b0SJason Yan if (sbi->s_blocks_per_group == clustersize << 3) 44624a8557b0SJason Yan set_opt2(sb, STD_GROUP_SIZE); 44634a8557b0SJason Yan 44644a8557b0SJason Yan return 0; 44654a8557b0SJason Yan } 44664a8557b0SJason Yan 4467f7314a67SJason Yan static void ext4_fast_commit_init(struct super_block *sb) 4468f7314a67SJason Yan { 4469f7314a67SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4470f7314a67SJason Yan 4471f7314a67SJason Yan /* Initialize fast commit stuff */ 4472f7314a67SJason Yan atomic_set(&sbi->s_fc_subtid, 0); 4473f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4474f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4475f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4476f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4477f7314a67SJason Yan sbi->s_fc_bytes = 0; 4478f7314a67SJason Yan ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 4479f7314a67SJason Yan sbi->s_fc_ineligible_tid = 0; 4480f7314a67SJason Yan spin_lock_init(&sbi->s_fc_lock); 4481f7314a67SJason Yan memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 4482f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions = NULL; 4483f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_size = 0; 4484f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_used = 0; 4485f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_valid = 0; 4486f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes = NULL; 4487f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 4488f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4489f7314a67SJason Yan } 4490f7314a67SJason Yan 44910e495f7cSJason Yan static int ext4_inode_info_init(struct super_block *sb, 4492c8267c51SJason Yan struct ext4_super_block *es) 44930e495f7cSJason Yan { 44940e495f7cSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44950e495f7cSJason Yan 44960e495f7cSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44970e495f7cSJason Yan sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44980e495f7cSJason Yan sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44990e495f7cSJason Yan } else { 45000e495f7cSJason Yan sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 45010e495f7cSJason Yan sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45020e495f7cSJason Yan if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45030e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45040e495f7cSJason Yan sbi->s_first_ino); 45050e495f7cSJason Yan return -EINVAL; 45060e495f7cSJason Yan } 45070e495f7cSJason Yan if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45080e495f7cSJason Yan (!is_power_of_2(sbi->s_inode_size)) || 4509c8267c51SJason Yan (sbi->s_inode_size > sb->s_blocksize)) { 45100e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45110e495f7cSJason Yan "unsupported inode size: %d", 45120e495f7cSJason Yan sbi->s_inode_size); 4513c8267c51SJason Yan ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize); 45140e495f7cSJason Yan return -EINVAL; 45150e495f7cSJason Yan } 45160e495f7cSJason Yan /* 45170e495f7cSJason Yan * i_atime_extra is the last extra field available for 45180e495f7cSJason Yan * [acm]times in struct ext4_inode. Checking for that 45190e495f7cSJason Yan * field should suffice to ensure we have extra space 45200e495f7cSJason Yan * for all three. 45210e495f7cSJason Yan */ 45220e495f7cSJason Yan if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45230e495f7cSJason Yan sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45240e495f7cSJason Yan sb->s_time_gran = 1; 45250e495f7cSJason Yan sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45260e495f7cSJason Yan } else { 45270e495f7cSJason Yan sb->s_time_gran = NSEC_PER_SEC; 45280e495f7cSJason Yan sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45290e495f7cSJason Yan } 45300e495f7cSJason Yan sb->s_time_min = EXT4_TIMESTAMP_MIN; 45310e495f7cSJason Yan } 45320e495f7cSJason Yan 45330e495f7cSJason Yan if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45340e495f7cSJason Yan sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45350e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE; 45360e495f7cSJason Yan if (ext4_has_feature_extra_isize(sb)) { 45370e495f7cSJason Yan unsigned v, max = (sbi->s_inode_size - 45380e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE); 45390e495f7cSJason Yan 45400e495f7cSJason Yan v = le16_to_cpu(es->s_want_extra_isize); 45410e495f7cSJason Yan if (v > max) { 45420e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45430e495f7cSJason Yan "bad s_want_extra_isize: %d", v); 45440e495f7cSJason Yan return -EINVAL; 45450e495f7cSJason Yan } 45460e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45470e495f7cSJason Yan sbi->s_want_extra_isize = v; 45480e495f7cSJason Yan 45490e495f7cSJason Yan v = le16_to_cpu(es->s_min_extra_isize); 45500e495f7cSJason Yan if (v > max) { 45510e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45520e495f7cSJason Yan "bad s_min_extra_isize: %d", v); 45530e495f7cSJason Yan return -EINVAL; 45540e495f7cSJason Yan } 45550e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45560e495f7cSJason Yan sbi->s_want_extra_isize = v; 45570e495f7cSJason Yan } 45580e495f7cSJason Yan } 45590e495f7cSJason Yan 45600e495f7cSJason Yan return 0; 45610e495f7cSJason Yan } 45620e495f7cSJason Yan 456339c135b0SJason Yan #if IS_ENABLED(CONFIG_UNICODE) 456439c135b0SJason Yan static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 456539c135b0SJason Yan { 456639c135b0SJason Yan const struct ext4_sb_encodings *encoding_info; 456739c135b0SJason Yan struct unicode_map *encoding; 456839c135b0SJason Yan __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 456939c135b0SJason Yan 457039c135b0SJason Yan if (!ext4_has_feature_casefold(sb) || sb->s_encoding) 457139c135b0SJason Yan return 0; 457239c135b0SJason Yan 457339c135b0SJason Yan encoding_info = ext4_sb_read_encoding(es); 457439c135b0SJason Yan if (!encoding_info) { 457539c135b0SJason Yan ext4_msg(sb, KERN_ERR, 457639c135b0SJason Yan "Encoding requested by superblock is unknown"); 457739c135b0SJason Yan return -EINVAL; 457839c135b0SJason Yan } 457939c135b0SJason Yan 458039c135b0SJason Yan encoding = utf8_load(encoding_info->version); 458139c135b0SJason Yan if (IS_ERR(encoding)) { 458239c135b0SJason Yan ext4_msg(sb, KERN_ERR, 458339c135b0SJason Yan "can't mount with superblock charset: %s-%u.%u.%u " 458439c135b0SJason Yan "not supported by the kernel. flags: 0x%x.", 458539c135b0SJason Yan encoding_info->name, 458639c135b0SJason Yan unicode_major(encoding_info->version), 458739c135b0SJason Yan unicode_minor(encoding_info->version), 458839c135b0SJason Yan unicode_rev(encoding_info->version), 458939c135b0SJason Yan encoding_flags); 459039c135b0SJason Yan return -EINVAL; 459139c135b0SJason Yan } 459239c135b0SJason Yan ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 459339c135b0SJason Yan "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 459439c135b0SJason Yan unicode_major(encoding_info->version), 459539c135b0SJason Yan unicode_minor(encoding_info->version), 459639c135b0SJason Yan unicode_rev(encoding_info->version), 459739c135b0SJason Yan encoding_flags); 459839c135b0SJason Yan 459939c135b0SJason Yan sb->s_encoding = encoding; 460039c135b0SJason Yan sb->s_encoding_flags = encoding_flags; 460139c135b0SJason Yan 460239c135b0SJason Yan return 0; 460339c135b0SJason Yan } 460439c135b0SJason Yan #else 460539c135b0SJason Yan static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 460639c135b0SJason Yan { 460739c135b0SJason Yan return 0; 460839c135b0SJason Yan } 460939c135b0SJason Yan #endif 461039c135b0SJason Yan 4611b26458d1SJason Yan static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) 4612b26458d1SJason Yan { 4613b26458d1SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4614b26458d1SJason Yan 4615b26458d1SJason Yan /* Warn if metadata_csum and gdt_csum are both set. */ 4616b26458d1SJason Yan if (ext4_has_feature_metadata_csum(sb) && 4617b26458d1SJason Yan ext4_has_feature_gdt_csum(sb)) 4618b26458d1SJason Yan ext4_warning(sb, "metadata_csum and uninit_bg are " 4619b26458d1SJason Yan "redundant flags; please run fsck."); 4620b26458d1SJason Yan 4621b26458d1SJason Yan /* Check for a known checksum algorithm */ 4622b26458d1SJason Yan if (!ext4_verify_csum_type(sb, es)) { 4623b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4624b26458d1SJason Yan "unknown checksum algorithm."); 4625b26458d1SJason Yan return -EINVAL; 4626b26458d1SJason Yan } 4627b26458d1SJason Yan ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 4628b26458d1SJason Yan ext4_orphan_file_block_trigger); 4629b26458d1SJason Yan 4630b26458d1SJason Yan /* Load the checksum driver */ 4631b26458d1SJason Yan sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 4632b26458d1SJason Yan if (IS_ERR(sbi->s_chksum_driver)) { 4633b26458d1SJason Yan int ret = PTR_ERR(sbi->s_chksum_driver); 4634b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 4635b26458d1SJason Yan sbi->s_chksum_driver = NULL; 4636b26458d1SJason Yan return ret; 4637b26458d1SJason Yan } 4638b26458d1SJason Yan 4639b26458d1SJason Yan /* Check superblock checksum */ 4640b26458d1SJason Yan if (!ext4_superblock_csum_verify(sb, es)) { 4641b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4642b26458d1SJason Yan "invalid superblock checksum. Run e2fsck?"); 4643b26458d1SJason Yan return -EFSBADCRC; 4644b26458d1SJason Yan } 4645b26458d1SJason Yan 4646b26458d1SJason Yan /* Precompute checksum seed for all metadata */ 4647b26458d1SJason Yan if (ext4_has_feature_csum_seed(sb)) 4648b26458d1SJason Yan sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4649b26458d1SJason Yan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4650b26458d1SJason Yan sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4651b26458d1SJason Yan sizeof(es->s_uuid)); 4652b26458d1SJason Yan return 0; 4653b26458d1SJason Yan } 4654b26458d1SJason Yan 4655d7f3542bSJason Yan static int ext4_check_feature_compatibility(struct super_block *sb, 4656d7f3542bSJason Yan struct ext4_super_block *es, 4657d7f3542bSJason Yan int silent) 4658d7f3542bSJason Yan { 465954902099SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 466054902099SJason Yan 4661d7f3542bSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4662d7f3542bSJason Yan (ext4_has_compat_features(sb) || 4663d7f3542bSJason Yan ext4_has_ro_compat_features(sb) || 4664d7f3542bSJason Yan ext4_has_incompat_features(sb))) 4665d7f3542bSJason Yan ext4_msg(sb, KERN_WARNING, 4666d7f3542bSJason Yan "feature flags set on rev 0 fs, " 4667d7f3542bSJason Yan "running e2fsck is recommended"); 4668d7f3542bSJason Yan 4669d7f3542bSJason Yan if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4670d7f3542bSJason Yan set_opt2(sb, HURD_COMPAT); 4671d7f3542bSJason Yan if (ext4_has_feature_64bit(sb)) { 4672d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4673d7f3542bSJason Yan "The Hurd can't support 64-bit file systems"); 4674d7f3542bSJason Yan return -EINVAL; 4675d7f3542bSJason Yan } 4676d7f3542bSJason Yan 4677d7f3542bSJason Yan /* 4678d7f3542bSJason Yan * ea_inode feature uses l_i_version field which is not 4679d7f3542bSJason Yan * available in HURD_COMPAT mode. 4680d7f3542bSJason Yan */ 4681d7f3542bSJason Yan if (ext4_has_feature_ea_inode(sb)) { 4682d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4683d7f3542bSJason Yan "ea_inode feature is not supported for Hurd"); 4684d7f3542bSJason Yan return -EINVAL; 4685d7f3542bSJason Yan } 4686d7f3542bSJason Yan } 4687d7f3542bSJason Yan 4688d7f3542bSJason Yan if (IS_EXT2_SB(sb)) { 4689d7f3542bSJason Yan if (ext2_feature_set_ok(sb)) 4690d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 4691d7f3542bSJason Yan "using the ext4 subsystem"); 4692d7f3542bSJason Yan else { 4693d7f3542bSJason Yan /* 4694d7f3542bSJason Yan * If we're probing be silent, if this looks like 4695d7f3542bSJason Yan * it's actually an ext[34] filesystem. 4696d7f3542bSJason Yan */ 4697d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4698d7f3542bSJason Yan return -EINVAL; 4699d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 4700d7f3542bSJason Yan "to feature incompatibilities"); 4701d7f3542bSJason Yan return -EINVAL; 4702d7f3542bSJason Yan } 4703d7f3542bSJason Yan } 4704d7f3542bSJason Yan 4705d7f3542bSJason Yan if (IS_EXT3_SB(sb)) { 4706d7f3542bSJason Yan if (ext3_feature_set_ok(sb)) 4707d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 4708d7f3542bSJason Yan "using the ext4 subsystem"); 4709d7f3542bSJason Yan else { 4710d7f3542bSJason Yan /* 4711d7f3542bSJason Yan * If we're probing be silent, if this looks like 4712d7f3542bSJason Yan * it's actually an ext4 filesystem. 4713d7f3542bSJason Yan */ 4714d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4715d7f3542bSJason Yan return -EINVAL; 4716d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 4717d7f3542bSJason Yan "to feature incompatibilities"); 4718d7f3542bSJason Yan return -EINVAL; 4719d7f3542bSJason Yan } 4720d7f3542bSJason Yan } 4721d7f3542bSJason Yan 4722d7f3542bSJason Yan /* 4723d7f3542bSJason Yan * Check feature flags regardless of the revision level, since we 4724d7f3542bSJason Yan * previously didn't change the revision level when setting the flags, 4725d7f3542bSJason Yan * so there is a chance incompat flags are set on a rev 0 filesystem. 4726d7f3542bSJason Yan */ 4727d7f3542bSJason Yan if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4728d7f3542bSJason Yan return -EINVAL; 4729d7f3542bSJason Yan 473054902099SJason Yan if (sbi->s_daxdev) { 473154902099SJason Yan if (sb->s_blocksize == PAGE_SIZE) 473254902099SJason Yan set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 473354902099SJason Yan else 473454902099SJason Yan ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 473554902099SJason Yan } 473654902099SJason Yan 473754902099SJason Yan if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 473854902099SJason Yan if (ext4_has_feature_inline_data(sb)) { 473954902099SJason Yan ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 474054902099SJason Yan " that may contain inline data"); 474154902099SJason Yan return -EINVAL; 474254902099SJason Yan } 474354902099SJason Yan if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 474454902099SJason Yan ext4_msg(sb, KERN_ERR, 474554902099SJason Yan "DAX unsupported by block device."); 474654902099SJason Yan return -EINVAL; 474754902099SJason Yan } 474854902099SJason Yan } 474954902099SJason Yan 475054902099SJason Yan if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 475154902099SJason Yan ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 475254902099SJason Yan es->s_encryption_level); 475354902099SJason Yan return -EINVAL; 475454902099SJason Yan } 475554902099SJason Yan 4756d7f3542bSJason Yan return 0; 4757d7f3542bSJason Yan } 4758d7f3542bSJason Yan 475968e62439SJason Yan static int ext4_check_geometry(struct super_block *sb, 4760bc62dbf9SJason Yan struct ext4_super_block *es) 4761bc62dbf9SJason Yan { 4762bc62dbf9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4763bc62dbf9SJason Yan __u64 blocks_count; 4764269e9226SJason Yan int err; 4765269e9226SJason Yan 4766269e9226SJason Yan if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) { 4767269e9226SJason Yan ext4_msg(sb, KERN_ERR, 4768269e9226SJason Yan "Number of reserved GDT blocks insanely large: %d", 4769269e9226SJason Yan le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 4770269e9226SJason Yan return -EINVAL; 4771269e9226SJason Yan } 4772269e9226SJason Yan /* 4773269e9226SJason Yan * Test whether we have more sectors than will fit in sector_t, 4774269e9226SJason Yan * and whether the max offset is addressable by the page cache. 4775269e9226SJason Yan */ 4776269e9226SJason Yan err = generic_check_addressable(sb->s_blocksize_bits, 4777269e9226SJason Yan ext4_blocks_count(es)); 4778269e9226SJason Yan if (err) { 4779269e9226SJason Yan ext4_msg(sb, KERN_ERR, "filesystem" 4780269e9226SJason Yan " too large to mount safely on this system"); 4781269e9226SJason Yan return err; 4782269e9226SJason Yan } 4783bc62dbf9SJason Yan 4784bc62dbf9SJason Yan /* check blocks count against device size */ 4785bc62dbf9SJason Yan blocks_count = sb_bdev_nr_blocks(sb); 4786bc62dbf9SJason Yan if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4787bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4788bc62dbf9SJason Yan "exceeds size of device (%llu blocks)", 4789bc62dbf9SJason Yan ext4_blocks_count(es), blocks_count); 4790bc62dbf9SJason Yan return -EINVAL; 4791bc62dbf9SJason Yan } 4792bc62dbf9SJason Yan 4793bc62dbf9SJason Yan /* 4794bc62dbf9SJason Yan * It makes no sense for the first data block to be beyond the end 4795bc62dbf9SJason Yan * of the filesystem. 4796bc62dbf9SJason Yan */ 4797bc62dbf9SJason Yan if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4798bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4799bc62dbf9SJason Yan "block %u is beyond end of filesystem (%llu)", 4800bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4801bc62dbf9SJason Yan ext4_blocks_count(es)); 4802bc62dbf9SJason Yan return -EINVAL; 4803bc62dbf9SJason Yan } 4804bc62dbf9SJason Yan if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4805bc62dbf9SJason Yan (sbi->s_cluster_ratio == 1)) { 4806bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4807bc62dbf9SJason Yan "block is 0 with a 1k block and cluster size"); 4808bc62dbf9SJason Yan return -EINVAL; 4809bc62dbf9SJason Yan } 4810bc62dbf9SJason Yan 4811bc62dbf9SJason Yan blocks_count = (ext4_blocks_count(es) - 4812bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block) + 4813bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb) - 1); 4814bc62dbf9SJason Yan do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 4815bc62dbf9SJason Yan if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4816bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 4817bc62dbf9SJason Yan "(block count %llu, first data block %u, " 4818bc62dbf9SJason Yan "blocks per group %lu)", blocks_count, 4819bc62dbf9SJason Yan ext4_blocks_count(es), 4820bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4821bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb)); 4822bc62dbf9SJason Yan return -EINVAL; 4823bc62dbf9SJason Yan } 4824bc62dbf9SJason Yan sbi->s_groups_count = blocks_count; 4825bc62dbf9SJason Yan sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4826bc62dbf9SJason Yan (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4827bc62dbf9SJason Yan if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4828bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count)) { 4829bc62dbf9SJason Yan ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4830bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count), 4831bc62dbf9SJason Yan ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4832bc62dbf9SJason Yan return -EINVAL; 4833bc62dbf9SJason Yan } 4834bc62dbf9SJason Yan 4835bc62dbf9SJason Yan return 0; 4836bc62dbf9SJason Yan } 4837bc62dbf9SJason Yan 4838a4e6a511SJason Yan static int ext4_group_desc_init(struct super_block *sb, 4839a4e6a511SJason Yan struct ext4_super_block *es, 4840a4e6a511SJason Yan ext4_fsblk_t logical_sb_block, 4841a4e6a511SJason Yan ext4_group_t *first_not_zeroed) 4842a4e6a511SJason Yan { 4843a4e6a511SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4844a4e6a511SJason Yan unsigned int db_count; 4845a4e6a511SJason Yan ext4_fsblk_t block; 4846a4e6a511SJason Yan int i; 4847a4e6a511SJason Yan 4848a4e6a511SJason Yan db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4849a4e6a511SJason Yan EXT4_DESC_PER_BLOCK(sb); 4850a4e6a511SJason Yan if (ext4_has_feature_meta_bg(sb)) { 4851a4e6a511SJason Yan if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 4852a4e6a511SJason Yan ext4_msg(sb, KERN_WARNING, 4853a4e6a511SJason Yan "first meta block group too large: %u " 4854a4e6a511SJason Yan "(group descriptor block count %u)", 4855a4e6a511SJason Yan le32_to_cpu(es->s_first_meta_bg), db_count); 4856a4e6a511SJason Yan return -EINVAL; 4857a4e6a511SJason Yan } 4858a4e6a511SJason Yan } 4859a4e6a511SJason Yan rcu_assign_pointer(sbi->s_group_desc, 4860a4e6a511SJason Yan kvmalloc_array(db_count, 4861a4e6a511SJason Yan sizeof(struct buffer_head *), 4862a4e6a511SJason Yan GFP_KERNEL)); 4863a4e6a511SJason Yan if (sbi->s_group_desc == NULL) { 4864a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "not enough memory"); 4865a4e6a511SJason Yan return -ENOMEM; 4866a4e6a511SJason Yan } 4867a4e6a511SJason Yan 4868a4e6a511SJason Yan bgl_lock_init(sbi->s_blockgroup_lock); 4869a4e6a511SJason Yan 4870a4e6a511SJason Yan /* Pre-read the descriptors into the buffer cache */ 4871a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4872a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4873a4e6a511SJason Yan ext4_sb_breadahead_unmovable(sb, block); 4874a4e6a511SJason Yan } 4875a4e6a511SJason Yan 4876a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4877a4e6a511SJason Yan struct buffer_head *bh; 4878a4e6a511SJason Yan 4879a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4880a4e6a511SJason Yan bh = ext4_sb_bread_unmovable(sb, block); 4881a4e6a511SJason Yan if (IS_ERR(bh)) { 4882a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, 4883a4e6a511SJason Yan "can't read group descriptor %d", i); 4884a4e6a511SJason Yan sbi->s_gdb_count = i; 4885172e344eSYe Bin return PTR_ERR(bh); 4886a4e6a511SJason Yan } 4887a4e6a511SJason Yan rcu_read_lock(); 4888a4e6a511SJason Yan rcu_dereference(sbi->s_group_desc)[i] = bh; 4889a4e6a511SJason Yan rcu_read_unlock(); 4890a4e6a511SJason Yan } 4891a4e6a511SJason Yan sbi->s_gdb_count = db_count; 4892a4e6a511SJason Yan if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { 4893a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 4894172e344eSYe Bin return -EFSCORRUPTED; 4895a4e6a511SJason Yan } 4896172e344eSYe Bin 4897a4e6a511SJason Yan return 0; 4898a4e6a511SJason Yan } 4899a4e6a511SJason Yan 49009c1dd22dSJason Yan static int ext4_load_and_init_journal(struct super_block *sb, 49019c1dd22dSJason Yan struct ext4_super_block *es, 49029c1dd22dSJason Yan struct ext4_fs_context *ctx) 49039c1dd22dSJason Yan { 49049c1dd22dSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 49059c1dd22dSJason Yan int err; 49069c1dd22dSJason Yan 49079c1dd22dSJason Yan err = ext4_load_journal(sb, es, ctx->journal_devnum); 49089c1dd22dSJason Yan if (err) 49099c1dd22dSJason Yan return err; 49109c1dd22dSJason Yan 49119c1dd22dSJason Yan if (ext4_has_feature_64bit(sb) && 49129c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 49139c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_64BIT)) { 49149c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 49159c1dd22dSJason Yan goto out; 49169c1dd22dSJason Yan } 49179c1dd22dSJason Yan 49189c1dd22dSJason Yan if (!set_journal_csum_feature_set(sb)) { 49199c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 49209c1dd22dSJason Yan "feature set"); 49219c1dd22dSJason Yan goto out; 49229c1dd22dSJason Yan } 49239c1dd22dSJason Yan 49249c1dd22dSJason Yan if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 49259c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 49269c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 49279c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, 49289c1dd22dSJason Yan "Failed to set fast commit journal feature"); 49299c1dd22dSJason Yan goto out; 49309c1dd22dSJason Yan } 49319c1dd22dSJason Yan 49329c1dd22dSJason Yan /* We have now updated the journal if required, so we can 49339c1dd22dSJason Yan * validate the data journaling mode. */ 49349c1dd22dSJason Yan switch (test_opt(sb, DATA_FLAGS)) { 49359c1dd22dSJason Yan case 0: 49369c1dd22dSJason Yan /* No mode set, assume a default based on the journal 49379c1dd22dSJason Yan * capabilities: ORDERED_DATA if the journal can 49389c1dd22dSJason Yan * cope, else JOURNAL_DATA 49399c1dd22dSJason Yan */ 49409c1dd22dSJason Yan if (jbd2_journal_check_available_features 49419c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49429c1dd22dSJason Yan set_opt(sb, ORDERED_DATA); 49439c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 49449c1dd22dSJason Yan } else { 49459c1dd22dSJason Yan set_opt(sb, JOURNAL_DATA); 49469c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 49479c1dd22dSJason Yan } 49489c1dd22dSJason Yan break; 49499c1dd22dSJason Yan 49509c1dd22dSJason Yan case EXT4_MOUNT_ORDERED_DATA: 49519c1dd22dSJason Yan case EXT4_MOUNT_WRITEBACK_DATA: 49529c1dd22dSJason Yan if (!jbd2_journal_check_available_features 49539c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49549c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Journal does not support " 49559c1dd22dSJason Yan "requested data journaling mode"); 49569c1dd22dSJason Yan goto out; 49579c1dd22dSJason Yan } 49589c1dd22dSJason Yan break; 49599c1dd22dSJason Yan default: 49609c1dd22dSJason Yan break; 49619c1dd22dSJason Yan } 49629c1dd22dSJason Yan 49639c1dd22dSJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 49649c1dd22dSJason Yan test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 49659c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 49669c1dd22dSJason Yan "journal_async_commit in data=ordered mode"); 49679c1dd22dSJason Yan goto out; 49689c1dd22dSJason Yan } 49699c1dd22dSJason Yan 49709c1dd22dSJason Yan set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 49719c1dd22dSJason Yan 49729c1dd22dSJason Yan sbi->s_journal->j_submit_inode_data_buffers = 49739c1dd22dSJason Yan ext4_journal_submit_inode_data_buffers; 49749c1dd22dSJason Yan sbi->s_journal->j_finish_inode_data_buffers = 49759c1dd22dSJason Yan ext4_journal_finish_inode_data_buffers; 49769c1dd22dSJason Yan 49779c1dd22dSJason Yan return 0; 49789c1dd22dSJason Yan 49799c1dd22dSJason Yan out: 4980bb15cea2STheodore Ts'o /* flush s_sb_upd_work before destroying the journal. */ 4981bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 49829c1dd22dSJason Yan jbd2_journal_destroy(sbi->s_journal); 49839c1dd22dSJason Yan sbi->s_journal = NULL; 49849f2a1d9fSJason Yan return -EINVAL; 49859c1dd22dSJason Yan } 49869c1dd22dSJason Yan 498768e62439SJason Yan static int ext4_check_journal_data_mode(struct super_block *sb) 4988a5991e53SJason Yan { 4989a5991e53SJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4990a5991e53SJason Yan printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with " 4991a5991e53SJason Yan "data=journal disables delayed allocation, " 4992a5991e53SJason Yan "dioread_nolock, O_DIRECT and fast_commit support!\n"); 4993a5991e53SJason Yan /* can't mount with both data=journal and dioread_nolock. */ 4994a5991e53SJason Yan clear_opt(sb, DIOREAD_NOLOCK); 4995a5991e53SJason Yan clear_opt2(sb, JOURNAL_FAST_COMMIT); 4996a5991e53SJason Yan if (test_opt2(sb, EXPLICIT_DELALLOC)) { 4997a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4998a5991e53SJason Yan "both data=journal and delalloc"); 4999a5991e53SJason Yan return -EINVAL; 5000a5991e53SJason Yan } 5001a5991e53SJason Yan if (test_opt(sb, DAX_ALWAYS)) { 5002a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 5003a5991e53SJason Yan "both data=journal and dax"); 5004a5991e53SJason Yan return -EINVAL; 5005a5991e53SJason Yan } 5006a5991e53SJason Yan if (ext4_has_feature_encrypt(sb)) { 5007a5991e53SJason Yan ext4_msg(sb, KERN_WARNING, 5008a5991e53SJason Yan "encrypted files will use data=ordered " 5009a5991e53SJason Yan "instead of data journaling mode"); 5010a5991e53SJason Yan } 5011a5991e53SJason Yan if (test_opt(sb, DELALLOC)) 5012a5991e53SJason Yan clear_opt(sb, DELALLOC); 5013a5991e53SJason Yan } else { 5014a5991e53SJason Yan sb->s_iflags |= SB_I_CGROUPWB; 5015a5991e53SJason Yan } 5016a5991e53SJason Yan 5017a5991e53SJason Yan return 0; 5018a5991e53SJason Yan } 5019a5991e53SJason Yan 5020a7a79c29SJason Yan static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, 5021a7a79c29SJason Yan int silent) 5022a7a79c29SJason Yan { 5023a7a79c29SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5024a7a79c29SJason Yan struct ext4_super_block *es; 5025a7a79c29SJason Yan ext4_fsblk_t logical_sb_block; 5026a7a79c29SJason Yan unsigned long offset = 0; 5027a7a79c29SJason Yan struct buffer_head *bh; 5028a7a79c29SJason Yan int ret = -EINVAL; 5029a7a79c29SJason Yan int blocksize; 5030a7a79c29SJason Yan 5031a7a79c29SJason Yan blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 5032a7a79c29SJason Yan if (!blocksize) { 5033a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 5034a7a79c29SJason Yan return -EINVAL; 5035a7a79c29SJason Yan } 5036a7a79c29SJason Yan 5037a7a79c29SJason Yan /* 5038a7a79c29SJason Yan * The ext4 superblock will not be buffer aligned for other than 1kB 5039a7a79c29SJason Yan * block sizes. We need to calculate the offset from buffer start. 5040a7a79c29SJason Yan */ 5041a7a79c29SJason Yan if (blocksize != EXT4_MIN_BLOCK_SIZE) { 5042a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5043a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5044a7a79c29SJason Yan } else { 5045a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block; 5046a7a79c29SJason Yan } 5047a7a79c29SJason Yan 5048a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5049a7a79c29SJason Yan if (IS_ERR(bh)) { 5050a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to read superblock"); 5051a7a79c29SJason Yan return PTR_ERR(bh); 5052a7a79c29SJason Yan } 5053a7a79c29SJason Yan /* 5054a7a79c29SJason Yan * Note: s_es must be initialized as soon as possible because 5055a7a79c29SJason Yan * some ext4 macro-instructions depend on its value 5056a7a79c29SJason Yan */ 5057a7a79c29SJason Yan es = (struct ext4_super_block *) (bh->b_data + offset); 5058a7a79c29SJason Yan sbi->s_es = es; 5059a7a79c29SJason Yan sb->s_magic = le16_to_cpu(es->s_magic); 5060a7a79c29SJason Yan if (sb->s_magic != EXT4_SUPER_MAGIC) { 5061a7a79c29SJason Yan if (!silent) 5062a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5063a7a79c29SJason Yan goto out; 5064a7a79c29SJason Yan } 5065a7a79c29SJason Yan 5066a7a79c29SJason Yan if (le32_to_cpu(es->s_log_block_size) > 5067a7a79c29SJason Yan (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5068a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5069a7a79c29SJason Yan "Invalid log block size: %u", 5070a7a79c29SJason Yan le32_to_cpu(es->s_log_block_size)); 5071a7a79c29SJason Yan goto out; 5072a7a79c29SJason Yan } 5073a7a79c29SJason Yan if (le32_to_cpu(es->s_log_cluster_size) > 5074a7a79c29SJason Yan (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5075a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5076a7a79c29SJason Yan "Invalid log cluster size: %u", 5077a7a79c29SJason Yan le32_to_cpu(es->s_log_cluster_size)); 5078a7a79c29SJason Yan goto out; 5079a7a79c29SJason Yan } 5080a7a79c29SJason Yan 5081a7a79c29SJason Yan blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 5082a7a79c29SJason Yan 5083a7a79c29SJason Yan /* 5084a7a79c29SJason Yan * If the default block size is not the same as the real block size, 5085a7a79c29SJason Yan * we need to reload it. 5086a7a79c29SJason Yan */ 5087a7a79c29SJason Yan if (sb->s_blocksize == blocksize) { 5088a7a79c29SJason Yan *lsb = logical_sb_block; 5089a7a79c29SJason Yan sbi->s_sbh = bh; 5090a7a79c29SJason Yan return 0; 5091a7a79c29SJason Yan } 5092a7a79c29SJason Yan 5093a7a79c29SJason Yan /* 5094a7a79c29SJason Yan * bh must be released before kill_bdev(), otherwise 5095a7a79c29SJason Yan * it won't be freed and its page also. kill_bdev() 5096a7a79c29SJason Yan * is called by sb_set_blocksize(). 5097a7a79c29SJason Yan */ 5098a7a79c29SJason Yan brelse(bh); 5099a7a79c29SJason Yan /* Validate the filesystem blocksize */ 5100a7a79c29SJason Yan if (!sb_set_blocksize(sb, blocksize)) { 5101a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "bad block size %d", 5102a7a79c29SJason Yan blocksize); 5103a7a79c29SJason Yan bh = NULL; 5104a7a79c29SJason Yan goto out; 5105a7a79c29SJason Yan } 5106a7a79c29SJason Yan 5107a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5108a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5109a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5110a7a79c29SJason Yan if (IS_ERR(bh)) { 5111a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try"); 5112a7a79c29SJason Yan ret = PTR_ERR(bh); 5113a7a79c29SJason Yan bh = NULL; 5114a7a79c29SJason Yan goto out; 5115a7a79c29SJason Yan } 5116a7a79c29SJason Yan es = (struct ext4_super_block *)(bh->b_data + offset); 5117a7a79c29SJason Yan sbi->s_es = es; 5118a7a79c29SJason Yan if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 5119a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); 5120a7a79c29SJason Yan goto out; 5121a7a79c29SJason Yan } 5122a7a79c29SJason Yan *lsb = logical_sb_block; 5123a7a79c29SJason Yan sbi->s_sbh = bh; 5124a7a79c29SJason Yan return 0; 5125a7a79c29SJason Yan out: 5126a7a79c29SJason Yan brelse(bh); 5127a7a79c29SJason Yan return ret; 5128a7a79c29SJason Yan } 5129a7a79c29SJason Yan 5130db9345d9SJason Yan static void ext4_hash_info_init(struct super_block *sb) 5131db9345d9SJason Yan { 5132db9345d9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5133db9345d9SJason Yan struct ext4_super_block *es = sbi->s_es; 5134db9345d9SJason Yan unsigned int i; 5135db9345d9SJason Yan 5136db9345d9SJason Yan for (i = 0; i < 4; i++) 5137db9345d9SJason Yan sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 5138db9345d9SJason Yan 5139db9345d9SJason Yan sbi->s_def_hash_version = es->s_def_hash_version; 5140db9345d9SJason Yan if (ext4_has_feature_dir_index(sb)) { 5141db9345d9SJason Yan i = le32_to_cpu(es->s_flags); 5142db9345d9SJason Yan if (i & EXT2_FLAGS_UNSIGNED_HASH) 5143db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5144db9345d9SJason Yan else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 5145db9345d9SJason Yan #ifdef __CHAR_UNSIGNED__ 5146db9345d9SJason Yan if (!sb_rdonly(sb)) 5147db9345d9SJason Yan es->s_flags |= 5148db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 5149db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5150db9345d9SJason Yan #else 5151db9345d9SJason Yan if (!sb_rdonly(sb)) 5152db9345d9SJason Yan es->s_flags |= 5153db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 5154db9345d9SJason Yan #endif 5155db9345d9SJason Yan } 5156db9345d9SJason Yan } 5157db9345d9SJason Yan } 5158db9345d9SJason Yan 5159107d2be9SJason Yan static int ext4_block_group_meta_init(struct super_block *sb, int silent) 5160107d2be9SJason Yan { 5161107d2be9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5162107d2be9SJason Yan struct ext4_super_block *es = sbi->s_es; 5163107d2be9SJason Yan int has_huge_files; 5164107d2be9SJason Yan 5165107d2be9SJason Yan has_huge_files = ext4_has_feature_huge_file(sb); 5166107d2be9SJason Yan sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 5167107d2be9SJason Yan has_huge_files); 5168107d2be9SJason Yan sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 5169107d2be9SJason Yan 5170107d2be9SJason Yan sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 5171107d2be9SJason Yan if (ext4_has_feature_64bit(sb)) { 5172107d2be9SJason Yan if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 5173107d2be9SJason Yan sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 5174107d2be9SJason Yan !is_power_of_2(sbi->s_desc_size)) { 5175107d2be9SJason Yan ext4_msg(sb, KERN_ERR, 5176107d2be9SJason Yan "unsupported descriptor size %lu", 5177107d2be9SJason Yan sbi->s_desc_size); 5178107d2be9SJason Yan return -EINVAL; 5179107d2be9SJason Yan } 5180107d2be9SJason Yan } else 5181107d2be9SJason Yan sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 5182107d2be9SJason Yan 5183107d2be9SJason Yan sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 5184107d2be9SJason Yan sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 5185107d2be9SJason Yan 5186107d2be9SJason Yan sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb); 5187107d2be9SJason Yan if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { 5188107d2be9SJason Yan if (!silent) 5189107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5190107d2be9SJason Yan return -EINVAL; 5191107d2be9SJason Yan } 5192107d2be9SJason Yan if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 5193107d2be9SJason Yan sbi->s_inodes_per_group > sb->s_blocksize * 8) { 5194107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 5195107d2be9SJason Yan sbi->s_inodes_per_group); 5196107d2be9SJason Yan return -EINVAL; 5197107d2be9SJason Yan } 5198107d2be9SJason Yan sbi->s_itb_per_group = sbi->s_inodes_per_group / 5199107d2be9SJason Yan sbi->s_inodes_per_block; 5200107d2be9SJason Yan sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb); 5201107d2be9SJason Yan sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 5202107d2be9SJason Yan sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 5203107d2be9SJason Yan sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 5204107d2be9SJason Yan 5205107d2be9SJason Yan return 0; 5206107d2be9SJason Yan } 5207107d2be9SJason Yan 5208960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 52097edfd85bSLukas Czerner { 5210617ba13bSMingming Cao struct ext4_super_block *es = NULL; 52117edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 521270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 5213ac27a0ecSDave Kleikamp struct inode *root; 5214107d2be9SJason Yan int needs_recovery; 5215d4fab7b2STheodore Ts'o int err; 5216bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 52177edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 5218960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 5219b237e304SHarshad Shirwadkar 5220b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 5221e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 52227edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5223ac27a0ecSDave Kleikamp 5224240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 5225f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 52268446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 5227ac27a0ecSDave Kleikamp 5228a7a79c29SJason Yan err = ext4_load_super(sb, &logical_sb_block, silent); 5229a7a79c29SJason Yan if (err) 5230ac27a0ecSDave Kleikamp goto out_fail; 5231ac27a0ecSDave Kleikamp 5232a7a79c29SJason Yan es = sbi->s_es; 5233afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 5234ac27a0ecSDave Kleikamp 5235b26458d1SJason Yan err = ext4_init_metadata_csum(sb, es); 5236b26458d1SJason Yan if (err) 5237a5fc5119SJason Yan goto failed_mount; 5238a9c47317SDarrick J. Wong 52395f6d662dSJason Yan ext4_set_def_opts(sb, es); 5240ac27a0ecSDave Kleikamp 524108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 524208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 524330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 524430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 524530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 5246ac27a0ecSDave Kleikamp 524751ce6511SLukas Czerner /* 524851ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 524951ce6511SLukas Czerner * no mount option specified. 525051ce6511SLukas Czerner */ 525151ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 525251ce6511SLukas Czerner 5253d4fab7b2STheodore Ts'o err = ext4_inode_info_init(sb, es); 5254d4fab7b2STheodore Ts'o if (err) 52559803387cSTheodore Ts'o goto failed_mount; 52569803387cSTheodore Ts'o 52577edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 52587edfd85bSLukas Czerner if (err < 0) 52595aee0f8aSTheodore Ts'o goto failed_mount; 52607edfd85bSLukas Czerner 52615a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 5262e3645d72SZhang Yi sbi->s_def_mount_opt2 = sbi->s_mount_opt2; 52637edfd85bSLukas Czerner 52647edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 52657edfd85bSLukas Czerner if (err < 0) 52667edfd85bSLukas Czerner goto failed_mount; 52677edfd85bSLukas Czerner 526885456054SEric Biggers ext4_apply_options(fc, sb); 5269ac27a0ecSDave Kleikamp 5270d4fab7b2STheodore Ts'o err = ext4_encoding_init(sb, es); 5271d4fab7b2STheodore Ts'o if (err) 5272c83ad55eSGabriel Krisman Bertazi goto failed_mount; 5273c83ad55eSGabriel Krisman Bertazi 5274d4fab7b2STheodore Ts'o err = ext4_check_journal_data_mode(sb); 5275d4fab7b2STheodore Ts'o if (err) 527656889787STheodore Ts'o goto failed_mount; 527756889787STheodore Ts'o 52781751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 52791751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5280ac27a0ecSDave Kleikamp 52811ff20307SJeff Layton /* i_version is always enabled now */ 52821ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 52831ff20307SJeff Layton 5284d4fab7b2STheodore Ts'o err = ext4_check_feature_compatibility(sb, es, silent); 5285d4fab7b2STheodore Ts'o if (err) 5286ac27a0ecSDave Kleikamp goto failed_mount; 5287a13fb1a4SEric Sandeen 5288d4fab7b2STheodore Ts'o err = ext4_block_group_meta_init(sb, silent); 5289d4fab7b2STheodore Ts'o if (err) 52905b9554dcSTheodore Ts'o goto failed_mount; 52915b9554dcSTheodore Ts'o 5292db9345d9SJason Yan ext4_hash_info_init(sb); 5293ac27a0ecSDave Kleikamp 5294d4fab7b2STheodore Ts'o err = ext4_handle_clustersize(sb); 5295d4fab7b2STheodore Ts'o if (err) 5296281b5995STheodore Ts'o goto failed_mount; 5297960fd856STheodore Ts'o 5298d4fab7b2STheodore Ts'o err = ext4_check_geometry(sb, es); 5299d4fab7b2STheodore Ts'o if (err) 53000f2ddca6SFrom: Thiemo Nagel goto failed_mount; 53010f2ddca6SFrom: Thiemo Nagel 5302235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5303c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5304bb15cea2STheodore Ts'o INIT_WORK(&sbi->s_sb_upd_work, update_super_work); 530504496411STao Ma 5306172e344eSYe Bin err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); 5307172e344eSYe Bin if (err) 5308172e344eSYe Bin goto failed_mount3; 5309172e344eSYe Bin 5310d4fab7b2STheodore Ts'o err = ext4_es_register_shrinker(sbi); 5311d4fab7b2STheodore Ts'o if (err) 5312ce7e010aSTheodore Ts'o goto failed_mount3; 5313ce7e010aSTheodore Ts'o 5314c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 5315c3defd99SKemeng Shi /* 5316c3defd99SKemeng Shi * It's hard to get stripe aligned blocks if stripe is not aligned with 5317c3defd99SKemeng Shi * cluster, just disable stripe and alert user to simpfy code and avoid 5318c3defd99SKemeng Shi * stripe aligned allocation which will rarely successes. 5319c3defd99SKemeng Shi */ 5320c3defd99SKemeng Shi if (sbi->s_stripe > 0 && sbi->s_cluster_ratio > 1 && 5321c3defd99SKemeng Shi sbi->s_stripe % sbi->s_cluster_ratio != 0) { 5322c3defd99SKemeng Shi ext4_msg(sb, KERN_WARNING, 5323c3defd99SKemeng Shi "stripe (%lu) is not aligned with cluster size (%u), " 5324c3defd99SKemeng Shi "stripe is disabled", 5325c3defd99SKemeng Shi sbi->s_stripe, sbi->s_cluster_ratio); 5326c3defd99SKemeng Shi sbi->s_stripe = 0; 5327c3defd99SKemeng Shi } 532867a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5329c9de560dSAlex Tomas 5330f9ae9cf5STheodore Ts'o /* 5331f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5332f9ae9cf5STheodore Ts'o */ 5333f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5334617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5335617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5336643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5337a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5338ffcc4182SEric Biggers #endif 5339c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5340c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5341c93d8f88SEric Biggers #endif 5342ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5343617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5344e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 53451fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5346262b4662SJan Kara else 5347262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5348689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5349ac27a0ecSDave Kleikamp #endif 535085787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5351f2fa2ffcSAneesh Kumar K.V 5352ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 53533b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5354ac27a0ecSDave Kleikamp 5355f7314a67SJason Yan ext4_fast_commit_init(sb); 5356aa75f4d3SHarshad Shirwadkar 5357ac27a0ecSDave Kleikamp sb->s_root = NULL; 5358ac27a0ecSDave Kleikamp 5359ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 536002f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5361e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5362ac27a0ecSDave Kleikamp 53633b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) { 53643b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block)); 53653b50d501STheodore Ts'o if (err) 536650460fe8SDarrick J. Wong goto failed_mount3a; 53673b50d501STheodore Ts'o } 5368c5e06d10SJohann Lombardi 5369d4fab7b2STheodore Ts'o err = -EINVAL; 5370ac27a0ecSDave Kleikamp /* 5371ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5372ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5373ac27a0ecSDave Kleikamp */ 5374e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 53759c1dd22dSJason Yan err = ext4_load_and_init_journal(sb, es, ctx); 53764753d8a2STheodore Ts'o if (err) 537750460fe8SDarrick J. Wong goto failed_mount3a; 5378bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5379e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5381b31e1552SEric Sandeen "suppressed and not mounted read-only"); 538243bd6f1bSJason Yan goto failed_mount3a; 5383ac27a0ecSDave Kleikamp } else { 53841e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 53851e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 53861e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53871e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 538843bd6f1bSJason Yan goto failed_mount3a; 53891e381f60SDmitry Monakhov } 539089481b5fSBaokun Li 539189481b5fSBaokun Li if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 539289481b5fSBaokun Li ext4_msg(sb, KERN_ERR, "can't mount with " 539389481b5fSBaokun Li "journal_checksum, fs mounted w/o journal"); 539489481b5fSBaokun Li goto failed_mount3a; 539589481b5fSBaokun Li } 53961e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 53971e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53981e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 53991e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 540043bd6f1bSJason Yan goto failed_mount3a; 54011e381f60SDmitry Monakhov } 54021e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 54031e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 54041e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 54051e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 540643bd6f1bSJason Yan goto failed_mount3a; 54071e381f60SDmitry Monakhov } 540850b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 54091e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5410fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5411995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 54120390131bSFrank Mayhar sbi->s_journal = NULL; 54130390131bSFrank Mayhar needs_recovery = 0; 5414ac27a0ecSDave Kleikamp } 5415ac27a0ecSDave Kleikamp 5416cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 541747387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 541847387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5419cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5420cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 5421d4fab7b2STheodore Ts'o err = -EINVAL; 54229c191f70ST Makphaibulchoke goto failed_mount_wq; 54239c191f70ST Makphaibulchoke } 54249c191f70ST Makphaibulchoke 5425dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5426dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5427dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5428dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5429dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5430d4fab7b2STheodore Ts'o err = -EINVAL; 5431dec214d0STahsin Erdogan goto failed_mount_wq; 5432dec214d0STahsin Erdogan } 5433dec214d0STahsin Erdogan } 5434cdb7ee4cSTahsin Erdogan } 5435dec214d0STahsin Erdogan 5436fd89d5f2STejun Heo /* 5437952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5438952fc18eSTheodore Ts'o * superblock if present. 5439952fc18eSTheodore Ts'o */ 5440952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 544185d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 544285d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 544385d825dbSTheodore Ts'o sbi->s_overhead = 0; 544485d825dbSTheodore Ts'o /* 544585d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 544685d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 544785d825dbSTheodore Ts'o * it to make sure we are using the correct value. 544885d825dbSTheodore Ts'o */ 544985d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 545085d825dbSTheodore Ts'o sbi->s_overhead = 0; 545185d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 545207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 545307aa2ea1SLukas Czerner if (err) 5454952fc18eSTheodore Ts'o goto failed_mount_wq; 5455952fc18eSTheodore Ts'o } 5456952fc18eSTheodore Ts'o 5457952fc18eSTheodore Ts'o /* 5458fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5459fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5460fd89d5f2STejun Heo */ 54612e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 54622e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 54632e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 54642e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 5465d4fab7b2STheodore Ts'o err = -ENOMEM; 54662e8fa54eSJan Kara goto failed_mount4; 54672e8fa54eSJan Kara } 54682e8fa54eSJan Kara 5469ac27a0ecSDave Kleikamp /* 5470dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5471ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5472ac27a0ecSDave Kleikamp */ 5473ac27a0ecSDave Kleikamp 54748a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 54751d1fe1eeSDavid Howells if (IS_ERR(root)) { 5476b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 5477d4fab7b2STheodore Ts'o err = PTR_ERR(root); 547832a9bb57SManish Katiyar root = NULL; 5479ac27a0ecSDave Kleikamp goto failed_mount4; 5480ac27a0ecSDave Kleikamp } 5481ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5482b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 548394bf608aSAl Viro iput(root); 5484d4fab7b2STheodore Ts'o err = -EFSCORRUPTED; 5485ac27a0ecSDave Kleikamp goto failed_mount4; 5486ac27a0ecSDave Kleikamp } 5487b886ee3eSGabriel Krisman Bertazi 548848fde701SAl Viro sb->s_root = d_make_root(root); 54891d1fe1eeSDavid Howells if (!sb->s_root) { 5490b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 5491d4fab7b2STheodore Ts'o err = -ENOMEM; 54921d1fe1eeSDavid Howells goto failed_mount4; 54931d1fe1eeSDavid Howells } 5494ac27a0ecSDave Kleikamp 5495d4fab7b2STheodore Ts'o err = ext4_setup_super(sb, es, sb_rdonly(sb)); 5496d4fab7b2STheodore Ts'o if (err == -EROFS) { 54971751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5498d4fab7b2STheodore Ts'o } else if (err) 5499c89128a0SJaegeuk Kim goto failed_mount4a; 5500ef7f3835SKalpak Shah 5501b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 550227dd4385SLukas Czerner 55030f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 55046fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 55056fd058f7STheodore Ts'o if (err) { 5506b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5507fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5508f9ae9cf5STheodore Ts'o goto failed_mount4a; 5509f9ae9cf5STheodore Ts'o } 55100f5bde1dSJan Kara } 55118016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5512f9ae9cf5STheodore Ts'o 5513f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5514196e402aSHarshad Shirwadkar 5515196e402aSHarshad Shirwadkar /* 5516196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5517196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5518196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5519196e402aSHarshad Shirwadkar */ 552027b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 552127b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5522196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 552327b38686SOjaswin Mujoo else 5524196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 552527b38686SOjaswin Mujoo } 5526196e402aSHarshad Shirwadkar 5527f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5528f9ae9cf5STheodore Ts'o if (err) { 5529f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5530f9ae9cf5STheodore Ts'o err); 5531dcf2d804STao Ma goto failed_mount5; 5532c2774d84SAneesh Kumar K.V } 5533c2774d84SAneesh Kumar K.V 5534027f14f5STheodore Ts'o /* 5535027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5536027f14f5STheodore Ts'o * mballoc is initialized 5537027f14f5STheodore Ts'o */ 5538027f14f5STheodore Ts'o if (sbi->s_journal) 5539027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5540027f14f5STheodore Ts'o ext4_journal_commit_callback; 5541027f14f5STheodore Ts'o 5542d5e72c4eSTheodore Ts'o err = ext4_percpu_param_init(sbi); 5543d5e72c4eSTheodore Ts'o if (err) 5544d5e03cbbSTheodore Ts'o goto failed_mount6; 5545d5e03cbbSTheodore Ts'o 5546e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5547d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5548d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5549d5e03cbbSTheodore Ts'o "unable to initialize " 5550d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 5551d4fab7b2STheodore Ts'o err = -ENOMEM; 5552d5e03cbbSTheodore Ts'o goto failed_mount6; 5553d5e03cbbSTheodore Ts'o } 5554d5e03cbbSTheodore Ts'o 5555bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5556bfff6873SLukas Czerner if (err) 5557dcf2d804STao Ma goto failed_mount6; 5558bfff6873SLukas Czerner 5559b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5560dcf2d804STao Ma if (err) 5561dcf2d804STao Ma goto failed_mount7; 55623197ebdbSTheodore Ts'o 556302f310fcSJan Kara err = ext4_init_orphan_info(sb); 556402f310fcSJan Kara if (err) 556502f310fcSJan Kara goto failed_mount8; 55669b2ff357SJan Kara #ifdef CONFIG_QUOTA 55679b2ff357SJan Kara /* Enable quota usage during mount. */ 5568bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 55699b2ff357SJan Kara err = ext4_enable_quotas(sb); 55709b2ff357SJan Kara if (err) 557102f310fcSJan Kara goto failed_mount9; 55729b2ff357SJan Kara } 55739b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 55749b2ff357SJan Kara 5575bc71726cSzhangyi (F) /* 5576bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5577bc71726cSzhangyi (F) * used to detect the metadata async write error. 5578bc71726cSzhangyi (F) */ 5579bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5580bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5581bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5582617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5583617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5584617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 55859b6641ddSYe Bin /* 55869b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 55879b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 55889b6641ddSYe Bin * checksum in the buffer cache until it is written out and 55899b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 55909b6641ddSYe Bin * after it is mounted can fail. 55919b6641ddSYe Bin */ 55929b6641ddSYe Bin ext4_superblock_csum_set(sb); 55930390131bSFrank Mayhar if (needs_recovery) { 5594b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 559511215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 559611215630SJan Kara if (err) 5597d13f9963SBaokun Li goto failed_mount10; 55980390131bSFrank Mayhar } 55990390131bSFrank Mayhar 560070200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 560179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 560270200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 560379add3a3SLukas Czerner 560466e61a9eSTheodore Ts'o if (es->s_error_count) 560566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5606ac27a0ecSDave Kleikamp 5607efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5608efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5609efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5610efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 56111cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 56121cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5613efbed4dcSTheodore Ts'o 5614ac27a0ecSDave Kleikamp return 0; 5615ac27a0ecSDave Kleikamp 5616d13f9963SBaokun Li failed_mount10: 5617f3c1c42eSBaokun Li ext4_quotas_off(sb, EXT4_MAXQUOTAS); 5618d13f9963SBaokun Li failed_mount9: __maybe_unused 561902f310fcSJan Kara ext4_release_orphan_info(sb); 562072ba7450STheodore Ts'o failed_mount8: 5621ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5622cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5623dcf2d804STao Ma failed_mount7: 5624dcf2d804STao Ma ext4_unregister_li_request(sb); 5625dcf2d804STao Ma failed_mount6: 5626f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 5627dcbf8758SJason Yan ext4_flex_groups_free(sbi); 56281f79467cSJason Yan ext4_percpu_param_destroy(sbi); 562900764937SAzat Khuzhin failed_mount5: 5630f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5631f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5632f9ae9cf5STheodore Ts'o failed_mount4a: 563394bf608aSAl Viro dput(sb->s_root); 563432a9bb57SManish Katiyar sb->s_root = NULL; 563594bf608aSAl Viro failed_mount4: 5636b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 56372e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 56382e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 56394c0425ffSMingming Cao failed_mount_wq: 5640dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5641dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 564250c15df6SChengguang Xu 564347387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 564447387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 564550c15df6SChengguang Xu 56460390131bSFrank Mayhar if (sbi->s_journal) { 5647bb15cea2STheodore Ts'o /* flush s_sb_upd_work before journal destroy. */ 5648bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 5649dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 565047b4a50bSJan Kara sbi->s_journal = NULL; 56510390131bSFrank Mayhar } 565250460fe8SDarrick J. Wong failed_mount3a: 5653d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5654eb68d0e2SZheng Liu failed_mount3: 5655bb15cea2STheodore Ts'o /* flush s_sb_upd_work before sbi destroy */ 5656bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 56572a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5658618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5659a4e6a511SJason Yan ext4_group_desc_free(sbi); 5660ac27a0ecSDave Kleikamp failed_mount: 56610441984aSDarrick J. Wong if (sbi->s_chksum_driver) 56620441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5663c83ad55eSGabriel Krisman Bertazi 56645298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5665f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5666c83ad55eSGabriel Krisman Bertazi #endif 5667c83ad55eSGabriel Krisman Bertazi 5668ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5669856dd6c5SNathan Chancellor for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++) 56700ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5671ac27a0ecSDave Kleikamp #endif 5672ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5673a7a79c29SJason Yan brelse(sbi->s_sbh); 56741489dffdSChristoph Hellwig if (sbi->s_journal_bdev) { 56751489dffdSChristoph Hellwig invalidate_bdev(sbi->s_journal_bdev); 56761489dffdSChristoph Hellwig blkdev_put(sbi->s_journal_bdev, sb); 56771489dffdSChristoph Hellwig } 5678ac27a0ecSDave Kleikamp out_fail: 567926fb5290SZhihao Cheng invalidate_bdev(sb->s_bdev); 5680ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5681d4fab7b2STheodore Ts'o return err; 5682ac27a0ecSDave Kleikamp } 5683ac27a0ecSDave Kleikamp 5684cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 56857edfd85bSLukas Czerner { 5686cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 56877edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56887edfd85bSLukas Czerner const char *descr; 5689cebe85d5SLukas Czerner int ret; 56907edfd85bSLukas Czerner 5691cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5692cebe85d5SLukas Czerner if (!sbi) 56937c268d4cSLukas Czerner return -ENOMEM; 5694cebe85d5SLukas Czerner 5695cebe85d5SLukas Czerner fc->s_fs_info = sbi; 56967edfd85bSLukas Czerner 56977edfd85bSLukas Czerner /* Cleanup superblock name */ 56987edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56997edfd85bSLukas Czerner 57007edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5701cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5702cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 57037edfd85bSLukas Czerner 5704960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 57057edfd85bSLukas Czerner if (ret < 0) 57067edfd85bSLukas Czerner goto free_sbi; 57077edfd85bSLukas Czerner 5708cebe85d5SLukas Czerner if (sbi->s_journal) { 57097edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 57107edfd85bSLukas Czerner descr = " journalled data mode"; 57117edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 57127edfd85bSLukas Czerner descr = " ordered data mode"; 57137edfd85bSLukas Czerner else 57147edfd85bSLukas Czerner descr = " writeback data mode"; 57157edfd85bSLukas Czerner } else 57167edfd85bSLukas Czerner descr = "out journal"; 57177edfd85bSLukas Czerner 57187edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 57196dcc98fbSTheodore Ts'o ext4_msg(sb, KERN_INFO, "mounted filesystem %pU %s with%s. " 57206dcc98fbSTheodore Ts'o "Quota mode: %s.", &sb->s_uuid, 57216dcc98fbSTheodore Ts'o sb_rdonly(sb) ? "ro" : "r/w", descr, 5722bb0fbc78SLukas Czerner ext4_quota_mode(sb)); 57237edfd85bSLukas Czerner 5724eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5725827891a3STheodore Ts'o ext4_update_overhead(sb, false); 57267edfd85bSLukas Czerner return 0; 5727cebe85d5SLukas Czerner 57287edfd85bSLukas Czerner free_sbi: 57297edfd85bSLukas Czerner ext4_free_sbi(sbi); 5730cebe85d5SLukas Czerner fc->s_fs_info = NULL; 57317edfd85bSLukas Czerner return ret; 57327edfd85bSLukas Czerner } 57337edfd85bSLukas Czerner 5734cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5735cebe85d5SLukas Czerner { 5736cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5737cebe85d5SLukas Czerner } 5738cebe85d5SLukas Czerner 5739ac27a0ecSDave Kleikamp /* 5740ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5741ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5742ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5743ac27a0ecSDave Kleikamp */ 5744617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5745ac27a0ecSDave Kleikamp { 5746617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5747ac27a0ecSDave Kleikamp 5748ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 574930773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 575030773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 57516866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5752ac27a0ecSDave Kleikamp 5753a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5754ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5755dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5756ac27a0ecSDave Kleikamp else 5757dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57585bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57595bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57605bf5683aSHidehiro Kawai else 57615bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 576272945058SZhang Yi /* 576372945058SZhang Yi * Always enable journal cycle record option, letting the journal 576472945058SZhang Yi * records log transactions continuously between each mount. 576572945058SZhang Yi */ 576672945058SZhang Yi journal->j_flags |= JBD2_CYCLE_RECORD; 5767a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5768ac27a0ecSDave Kleikamp } 5769ac27a0ecSDave Kleikamp 5770c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5771ac27a0ecSDave Kleikamp unsigned int journal_inum) 5772ac27a0ecSDave Kleikamp { 5773ac27a0ecSDave Kleikamp struct inode *journal_inode; 5774ac27a0ecSDave Kleikamp 5775c6cb7e77SEric Whitney /* 5776c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5777c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5778c6cb7e77SEric Whitney * will try to delete it. 5779c6cb7e77SEric Whitney */ 57808a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57811d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5782b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5783ee5c8071SZhang Yi return ERR_CAST(journal_inode); 5784ac27a0ecSDave Kleikamp } 5785ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5786ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5787ac27a0ecSDave Kleikamp iput(journal_inode); 5788b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5789ee5c8071SZhang Yi return ERR_PTR(-EFSCORRUPTED); 5790ac27a0ecSDave Kleikamp } 5791105c78e1SEric Biggers if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) { 5792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5793ac27a0ecSDave Kleikamp iput(journal_inode); 5794ee5c8071SZhang Yi return ERR_PTR(-EFSCORRUPTED); 5795c6cb7e77SEric Whitney } 5796c6cb7e77SEric Whitney 5797c6cb7e77SEric Whitney ext4_debug("Journal inode found at %p: %lld bytes\n", 5798c6cb7e77SEric Whitney journal_inode, journal_inode->i_size); 5799c6cb7e77SEric Whitney return journal_inode; 5800c6cb7e77SEric Whitney } 5801c6cb7e77SEric Whitney 580262913ae9STheodore Ts'o static int ext4_journal_bmap(journal_t *journal, sector_t *block) 580362913ae9STheodore Ts'o { 580462913ae9STheodore Ts'o struct ext4_map_blocks map; 580562913ae9STheodore Ts'o int ret; 580662913ae9STheodore Ts'o 580762913ae9STheodore Ts'o if (journal->j_inode == NULL) 580862913ae9STheodore Ts'o return 0; 580962913ae9STheodore Ts'o 581062913ae9STheodore Ts'o map.m_lblk = *block; 581162913ae9STheodore Ts'o map.m_len = 1; 581262913ae9STheodore Ts'o ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0); 581362913ae9STheodore Ts'o if (ret <= 0) { 581462913ae9STheodore Ts'o ext4_msg(journal->j_inode->i_sb, KERN_CRIT, 581562913ae9STheodore Ts'o "journal bmap failed: block %llu ret %d\n", 581662913ae9STheodore Ts'o *block, ret); 581762913ae9STheodore Ts'o jbd2_journal_abort(journal, ret ? ret : -EIO); 581862913ae9STheodore Ts'o return ret; 581962913ae9STheodore Ts'o } 582062913ae9STheodore Ts'o *block = map.m_pblk; 582162913ae9STheodore Ts'o return 0; 582262913ae9STheodore Ts'o } 582362913ae9STheodore Ts'o 5824ee5c8071SZhang Yi static journal_t *ext4_open_inode_journal(struct super_block *sb, 5825c6cb7e77SEric Whitney unsigned int journal_inum) 5826c6cb7e77SEric Whitney { 5827c6cb7e77SEric Whitney struct inode *journal_inode; 5828c6cb7e77SEric Whitney journal_t *journal; 5829c6cb7e77SEric Whitney 5830c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5831ee5c8071SZhang Yi if (IS_ERR(journal_inode)) 5832ee5c8071SZhang Yi return ERR_CAST(journal_inode); 5833ac27a0ecSDave Kleikamp 5834dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 58358e6cf5fbSZhang Yi if (IS_ERR(journal)) { 5836b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5837ac27a0ecSDave Kleikamp iput(journal_inode); 5838ee5c8071SZhang Yi return ERR_CAST(journal); 5839ac27a0ecSDave Kleikamp } 5840ac27a0ecSDave Kleikamp journal->j_private = sb; 584162913ae9STheodore Ts'o journal->j_bmap = ext4_journal_bmap; 5842617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5843ac27a0ecSDave Kleikamp return journal; 5844ac27a0ecSDave Kleikamp } 5845ac27a0ecSDave Kleikamp 5846bc74e6a3SZhang Yi static struct block_device *ext4_get_journal_blkdev(struct super_block *sb, 5847bc74e6a3SZhang Yi dev_t j_dev, ext4_fsblk_t *j_start, 5848bc74e6a3SZhang Yi ext4_fsblk_t *j_len) 5849ac27a0ecSDave Kleikamp { 5850ac27a0ecSDave Kleikamp struct buffer_head *bh; 5851bc74e6a3SZhang Yi struct block_device *bdev; 5852ac27a0ecSDave Kleikamp int hblock, blocksize; 5853617ba13bSMingming Cao ext4_fsblk_t sb_block; 5854ac27a0ecSDave Kleikamp unsigned long offset; 5855617ba13bSMingming Cao struct ext4_super_block *es; 5856ee5c8071SZhang Yi int errno; 58570390131bSFrank Mayhar 58586f5fc7deSChristoph Hellwig /* see get_tree_bdev why this is needed and safe */ 58596f5fc7deSChristoph Hellwig up_write(&sb->s_umount); 5860bc74e6a3SZhang Yi bdev = blkdev_get_by_dev(j_dev, BLK_OPEN_READ | BLK_OPEN_WRITE, sb, 58613ef96fcfSLinus Torvalds &fs_holder_ops); 58626f5fc7deSChristoph Hellwig down_write(&sb->s_umount); 5863bc74e6a3SZhang Yi if (IS_ERR(bdev)) { 5864bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, 5865bc74e6a3SZhang Yi "failed to open journal device unknown-block(%u,%u) %ld", 5866bc74e6a3SZhang Yi MAJOR(j_dev), MINOR(j_dev), PTR_ERR(bdev)); 5867ee5c8071SZhang Yi return ERR_CAST(bdev); 5868bc74e6a3SZhang Yi } 5869ac27a0ecSDave Kleikamp 5870ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5871e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5872ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5874b31e1552SEric Sandeen "blocksize too small for journal device"); 5875ee5c8071SZhang Yi errno = -EINVAL; 5876ac27a0ecSDave Kleikamp goto out_bdev; 5877ac27a0ecSDave Kleikamp } 5878ac27a0ecSDave Kleikamp 5879617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5880617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5881ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5882bc74e6a3SZhang Yi bh = __bread(bdev, sb_block, blocksize); 5883bc74e6a3SZhang Yi if (!bh) { 5884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5885b31e1552SEric Sandeen "external journal"); 5886ee5c8071SZhang Yi errno = -EINVAL; 5887ac27a0ecSDave Kleikamp goto out_bdev; 5888ac27a0ecSDave Kleikamp } 5889ac27a0ecSDave Kleikamp 58902716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5891617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5892ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5893617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5894bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, "external journal has bad superblock"); 5895ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5896bc74e6a3SZhang Yi goto out_bh; 5897ac27a0ecSDave Kleikamp } 5898ac27a0ecSDave Kleikamp 5899df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5900df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5901df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5902bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, "external journal has corrupt superblock"); 5903ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5904bc74e6a3SZhang Yi goto out_bh; 5905df4763beSDarrick J. Wong } 5906df4763beSDarrick J. Wong 5907617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5908b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5909ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5910bc74e6a3SZhang Yi goto out_bh; 5911ac27a0ecSDave Kleikamp } 5912ac27a0ecSDave Kleikamp 5913bc74e6a3SZhang Yi *j_start = sb_block + 1; 5914bc74e6a3SZhang Yi *j_len = ext4_blocks_count(es); 5915ac27a0ecSDave Kleikamp brelse(bh); 5916bc74e6a3SZhang Yi return bdev; 5917ac27a0ecSDave Kleikamp 5918bc74e6a3SZhang Yi out_bh: 5919bc74e6a3SZhang Yi brelse(bh); 5920bc74e6a3SZhang Yi out_bdev: 5921bc74e6a3SZhang Yi blkdev_put(bdev, sb); 5922ee5c8071SZhang Yi return ERR_PTR(errno); 5923ac27a0ecSDave Kleikamp } 5924ac27a0ecSDave Kleikamp 5925ee5c8071SZhang Yi static journal_t *ext4_open_dev_journal(struct super_block *sb, 5926bc74e6a3SZhang Yi dev_t j_dev) 5927bc74e6a3SZhang Yi { 5928bc74e6a3SZhang Yi journal_t *journal; 5929bc74e6a3SZhang Yi ext4_fsblk_t j_start; 5930bc74e6a3SZhang Yi ext4_fsblk_t j_len; 5931bc74e6a3SZhang Yi struct block_device *journal_bdev; 5932ee5c8071SZhang Yi int errno = 0; 5933ac27a0ecSDave Kleikamp 5934bc74e6a3SZhang Yi journal_bdev = ext4_get_journal_blkdev(sb, j_dev, &j_start, &j_len); 5935ee5c8071SZhang Yi if (IS_ERR(journal_bdev)) 5936ee5c8071SZhang Yi return ERR_CAST(journal_bdev); 5937bc74e6a3SZhang Yi 5938bc74e6a3SZhang Yi journal = jbd2_journal_init_dev(journal_bdev, sb->s_bdev, j_start, 5939bc74e6a3SZhang Yi j_len, sb->s_blocksize); 59408e6cf5fbSZhang Yi if (IS_ERR(journal)) { 5941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5942ee5c8071SZhang Yi errno = PTR_ERR(journal); 5943ac27a0ecSDave Kleikamp goto out_bdev; 5944ac27a0ecSDave Kleikamp } 5945ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5946b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5947b31e1552SEric Sandeen "user (unsupported) - %d", 5948ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5949ee5c8071SZhang Yi errno = -EINVAL; 5950ac27a0ecSDave Kleikamp goto out_journal; 5951ac27a0ecSDave Kleikamp } 5952bc74e6a3SZhang Yi journal->j_private = sb; 5953bc74e6a3SZhang Yi EXT4_SB(sb)->s_journal_bdev = journal_bdev; 5954617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5955ac27a0ecSDave Kleikamp return journal; 59560b8e58a1SAndreas Dilger 5957ac27a0ecSDave Kleikamp out_journal: 5958dab291afSMingming Cao jbd2_journal_destroy(journal); 5959ac27a0ecSDave Kleikamp out_bdev: 5960bc74e6a3SZhang Yi blkdev_put(journal_bdev, sb); 5961ee5c8071SZhang Yi return ERR_PTR(errno); 5962ac27a0ecSDave Kleikamp } 5963ac27a0ecSDave Kleikamp 5964617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5965617ba13bSMingming Cao struct ext4_super_block *es, 5966ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5967ac27a0ecSDave Kleikamp { 5968ac27a0ecSDave Kleikamp journal_t *journal; 5969ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5970ac27a0ecSDave Kleikamp dev_t journal_dev; 5971ac27a0ecSDave Kleikamp int err = 0; 5972ac27a0ecSDave Kleikamp int really_read_only; 5973273108faSLukas Czerner int journal_dev_ro; 5974ac27a0ecSDave Kleikamp 597511215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 597611215630SJan Kara return -EFSCORRUPTED; 59770390131bSFrank Mayhar 5978ac27a0ecSDave Kleikamp if (journal_devnum && 5979ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5980b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5981b31e1552SEric Sandeen "numbers have changed"); 5982ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5983ac27a0ecSDave Kleikamp } else 5984ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5985ac27a0ecSDave Kleikamp 5986273108faSLukas Czerner if (journal_inum && journal_dev) { 5987273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5988273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5989273108faSLukas Czerner return -EINVAL; 5990273108faSLukas Czerner } 5991273108faSLukas Czerner 5992273108faSLukas Czerner if (journal_inum) { 5993ee5c8071SZhang Yi journal = ext4_open_inode_journal(sb, journal_inum); 5994ee5c8071SZhang Yi if (IS_ERR(journal)) 5995ee5c8071SZhang Yi return PTR_ERR(journal); 5996273108faSLukas Czerner } else { 5997ee5c8071SZhang Yi journal = ext4_open_dev_journal(sb, journal_dev); 5998ee5c8071SZhang Yi if (IS_ERR(journal)) 5999ee5c8071SZhang Yi return PTR_ERR(journal); 6000273108faSLukas Czerner } 6001273108faSLukas Czerner 6002273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 6003273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 6004273108faSLukas Czerner 6005273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 6006273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 6007273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 6008273108faSLukas Czerner err = -EROFS; 6009273108faSLukas Czerner goto err_out; 6010273108faSLukas Czerner } 6011ac27a0ecSDave Kleikamp 6012ac27a0ecSDave Kleikamp /* 6013ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 6014ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 6015ac27a0ecSDave Kleikamp * can get read-write access to the device. 6016ac27a0ecSDave Kleikamp */ 6017e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 6018bc98a42cSDavid Howells if (sb_rdonly(sb)) { 6019b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 6020b31e1552SEric Sandeen "required on readonly filesystem"); 6021ac27a0ecSDave Kleikamp if (really_read_only) { 6022b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 6023d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 6024d98bf8cdSSimon Ruderich "(try mounting with noload)"); 6025273108faSLukas Czerner err = -EROFS; 6026273108faSLukas Czerner goto err_out; 6027ac27a0ecSDave Kleikamp } 6028b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 6029b31e1552SEric Sandeen "be enabled during recovery"); 6030ac27a0ecSDave Kleikamp } 6031ac27a0ecSDave Kleikamp } 6032ac27a0ecSDave Kleikamp 603390576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 6034b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 60354776004fSTheodore Ts'o 6036e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 6037dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 60381c13d5c0STheodore Ts'o if (!err) { 60391c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 60402ef6c32aSTheodore Ts'o __le16 orig_state; 60412ef6c32aSTheodore Ts'o bool changed = false; 6042eee00237SYe Bin 60431c13d5c0STheodore Ts'o if (save) 60441c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 60451c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 6046dab291afSMingming Cao err = jbd2_journal_load(journal); 60472ef6c32aSTheodore Ts'o if (save && memcmp(((char *) es) + EXT4_S_ERR_START, 60482ef6c32aSTheodore Ts'o save, EXT4_S_ERR_LEN)) { 60491c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 60501c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 60512ef6c32aSTheodore Ts'o changed = true; 60522ef6c32aSTheodore Ts'o } 60531c13d5c0STheodore Ts'o kfree(save); 60542ef6c32aSTheodore Ts'o orig_state = es->s_state; 6055eee00237SYe Bin es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state & 6056eee00237SYe Bin EXT4_ERROR_FS); 60572ef6c32aSTheodore Ts'o if (orig_state != es->s_state) 60582ef6c32aSTheodore Ts'o changed = true; 6059eee00237SYe Bin /* Write out restored error information to the superblock */ 60602ef6c32aSTheodore Ts'o if (changed && !really_read_only) { 6061eee00237SYe Bin int err2; 6062eee00237SYe Bin err2 = ext4_commit_super(sb); 6063eee00237SYe Bin err = err ? : err2; 6064eee00237SYe Bin } 60651c13d5c0STheodore Ts'o } 6066ac27a0ecSDave Kleikamp 6067ac27a0ecSDave Kleikamp if (err) { 6068b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 6069273108faSLukas Czerner goto err_out; 6070ac27a0ecSDave Kleikamp } 6071ac27a0ecSDave Kleikamp 6072617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 607311215630SJan Kara err = ext4_clear_journal_err(sb, es); 607411215630SJan Kara if (err) { 607511215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 607611215630SJan Kara jbd2_journal_destroy(journal); 607711215630SJan Kara return err; 607811215630SJan Kara } 6079ac27a0ecSDave Kleikamp 6080c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 6081ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 6082ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 60833039d8b8SBaokun Li ext4_commit_super(sb); 60843039d8b8SBaokun Li } 60853039d8b8SBaokun Li if (!really_read_only && journal_inum && 60863039d8b8SBaokun Li journal_inum != le32_to_cpu(es->s_journal_inum)) { 60873039d8b8SBaokun Li es->s_journal_inum = cpu_to_le32(journal_inum); 60884392fbc4SJan Kara ext4_commit_super(sb); 6089ac27a0ecSDave Kleikamp } 6090ac27a0ecSDave Kleikamp 6091ac27a0ecSDave Kleikamp return 0; 6092273108faSLukas Czerner 6093273108faSLukas Czerner err_out: 6094273108faSLukas Czerner jbd2_journal_destroy(journal); 6095273108faSLukas Czerner return err; 6096ac27a0ecSDave Kleikamp } 6097ac27a0ecSDave Kleikamp 60982d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 60992d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 6100ac27a0ecSDave Kleikamp { 6101c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 6102e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 6103e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 6104ac27a0ecSDave Kleikamp 610505c2c00fSJan Kara lock_buffer(sbh); 6106a17712c8SJon Derrick /* 610771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 610871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 610971290b36STheodore Ts'o * write time when we are mounting the root file system 611071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 611171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 611271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 611371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 611471290b36STheodore Ts'o * to complain and force a full file system check. 611571290b36STheodore Ts'o */ 6116d5d020b3SJan Kara if (!sb_rdonly(sb)) 61176a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 6118afc32f7eSTheodore Ts'o es->s_kbytes_written = 6119e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 61208446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6121e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6122e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 612357042651STheodore Ts'o ext4_free_blocks_count_set(es, 6124e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6125e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6126e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 61277f93cff9STheodore Ts'o es->s_free_inodes_count = 61287f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6129e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6130c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6131c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6132c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6133c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6134c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6135c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6136c92dc856SJan Kara &es->s_first_error_time_hi, 6137c92dc856SJan Kara sbi->s_first_error_time); 6138c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 6139c92dc856SJan Kara sizeof(es->s_first_error_func)); 6140c92dc856SJan Kara es->s_first_error_line = 6141c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6142c92dc856SJan Kara es->s_first_error_ino = 6143c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6144c92dc856SJan Kara es->s_first_error_block = 6145c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6146c92dc856SJan Kara es->s_first_error_errcode = 6147c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6148c92dc856SJan Kara } 6149c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6150c92dc856SJan Kara &es->s_last_error_time_hi, 6151c92dc856SJan Kara sbi->s_last_error_time); 6152c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 6153c92dc856SJan Kara sizeof(es->s_last_error_func)); 6154c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6155c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6156c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6157c92dc856SJan Kara es->s_last_error_errcode = 6158c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6159c92dc856SJan Kara /* 6160c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6161c92dc856SJan Kara * started already 6162c92dc856SJan Kara */ 6163c92dc856SJan Kara if (!es->s_error_count) 6164c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6165c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6166c92dc856SJan Kara sbi->s_add_error_count = 0; 6167c92dc856SJan Kara } 6168c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6169c92dc856SJan Kara 617006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 61712d01ddc8SJan Kara unlock_buffer(sbh); 61722d01ddc8SJan Kara } 61732d01ddc8SJan Kara 61742d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 61752d01ddc8SJan Kara { 61762d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 61772d01ddc8SJan Kara 6178f88f1466SFengnan Chang if (!sbh) 6179f88f1466SFengnan Chang return -EINVAL; 6180f88f1466SFengnan Chang if (block_device_ejected(sb)) 6181f88f1466SFengnan Chang return -ENODEV; 61822d01ddc8SJan Kara 61832d01ddc8SJan Kara ext4_update_super(sb); 61842d01ddc8SJan Kara 618515baa7dcSZhang Yi lock_buffer(sbh); 618615baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 618715baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 618815baa7dcSZhang Yi unlock_buffer(sbh); 618915baa7dcSZhang Yi return -EIO; 619015baa7dcSZhang Yi } 619115baa7dcSZhang Yi 6192e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 61934743f839SPranay Kr. Srivastava /* 61944743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 61954743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 61964743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 61974743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 61984743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 61994743f839SPranay Kr. Srivastava * write and hope for the best. 62004743f839SPranay Kr. Srivastava */ 62014743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 62024743f839SPranay Kr. Srivastava "superblock detected"); 62034743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 62044743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 62054743f839SPranay Kr. Srivastava } 620615baa7dcSZhang Yi get_bh(sbh); 620715baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 620815baa7dcSZhang Yi clear_buffer_dirty(sbh); 620915baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 62101420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 62111420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 621215baa7dcSZhang Yi wait_on_buffer(sbh); 6213c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6214b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6215b31e1552SEric Sandeen "superblock"); 6216914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6217914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 621815baa7dcSZhang Yi return -EIO; 6219914258bfSTheodore Ts'o } 622015baa7dcSZhang Yi return 0; 6221ac27a0ecSDave Kleikamp } 6222ac27a0ecSDave Kleikamp 6223ac27a0ecSDave Kleikamp /* 6224ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6225ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6226ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6227ac27a0ecSDave Kleikamp */ 622811215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6229617ba13bSMingming Cao struct ext4_super_block *es) 6230ac27a0ecSDave Kleikamp { 623111215630SJan Kara int err; 6232617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6233ac27a0ecSDave Kleikamp 6234e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 623511215630SJan Kara if (journal != NULL) { 623611215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 623711215630SJan Kara "mounted!"); 623811215630SJan Kara return -EFSCORRUPTED; 623911215630SJan Kara } 624011215630SJan Kara return 0; 62410390131bSFrank Mayhar } 6242dab291afSMingming Cao jbd2_journal_lock_updates(journal); 624301d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 624411215630SJan Kara if (err < 0) 62457ffe1ea8SHidehiro Kawai goto out; 62467ffe1ea8SHidehiro Kawai 624702f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 624802f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 624902f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 625002f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 625102f310fcSJan Kara err = -EFSCORRUPTED; 625202f310fcSJan Kara goto out; 625302f310fcSJan Kara } 6254e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 625502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 62564392fbc4SJan Kara ext4_commit_super(sb); 6257ac27a0ecSDave Kleikamp } 62587ffe1ea8SHidehiro Kawai out: 6259dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 626011215630SJan Kara return err; 6261ac27a0ecSDave Kleikamp } 6262ac27a0ecSDave Kleikamp 6263ac27a0ecSDave Kleikamp /* 6264ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6265ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6266ac27a0ecSDave Kleikamp * main filesystem now. 6267ac27a0ecSDave Kleikamp */ 626811215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6269617ba13bSMingming Cao struct ext4_super_block *es) 6270ac27a0ecSDave Kleikamp { 6271ac27a0ecSDave Kleikamp journal_t *journal; 6272ac27a0ecSDave Kleikamp int j_errno; 6273ac27a0ecSDave Kleikamp const char *errstr; 6274ac27a0ecSDave Kleikamp 627511215630SJan Kara if (!ext4_has_feature_journal(sb)) { 627611215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 627711215630SJan Kara return -EFSCORRUPTED; 627811215630SJan Kara } 62790390131bSFrank Mayhar 6280617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6281ac27a0ecSDave Kleikamp 6282ac27a0ecSDave Kleikamp /* 6283ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6284617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6285ac27a0ecSDave Kleikamp */ 6286ac27a0ecSDave Kleikamp 6287dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6288ac27a0ecSDave Kleikamp if (j_errno) { 6289ac27a0ecSDave Kleikamp char nbuf[16]; 6290ac27a0ecSDave Kleikamp 6291617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 629212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6293ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 6294ac27a0ecSDave Kleikamp 6295617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6296617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6297f57886caSYe Bin j_errno = ext4_commit_super(sb); 6298f57886caSYe Bin if (j_errno) 6299f57886caSYe Bin return j_errno; 6300f57886caSYe Bin ext4_warning(sb, "Marked fs in need of filesystem check."); 6301ac27a0ecSDave Kleikamp 6302dab291afSMingming Cao jbd2_journal_clear_err(journal); 6303d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6304ac27a0ecSDave Kleikamp } 630511215630SJan Kara return 0; 6306ac27a0ecSDave Kleikamp } 6307ac27a0ecSDave Kleikamp 6308ac27a0ecSDave Kleikamp /* 6309ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6310ac27a0ecSDave Kleikamp * and wait on the commit. 6311ac27a0ecSDave Kleikamp */ 6312617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6313ac27a0ecSDave Kleikamp { 6314889860e4SJan Kara return ext4_journal_force_commit(EXT4_SB(sb)->s_journal); 6315ac27a0ecSDave Kleikamp } 6316ac27a0ecSDave Kleikamp 6317617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6318ac27a0ecSDave Kleikamp { 631914ce0cb4STheodore Ts'o int ret = 0; 63209eddacf9SJan Kara tid_t target; 632106a407f1SDmitry Monakhov bool needs_barrier = false; 63228d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6323ac27a0ecSDave Kleikamp 6324eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 63250db1ff22STheodore Ts'o return 0; 63260db1ff22STheodore Ts'o 63279bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 63282e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6329a1177825SJan Kara /* 6330a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6331a1177825SJan Kara * no dirty dquots 6332a1177825SJan Kara */ 6333a1177825SJan Kara dquot_writeback_dquots(sb, -1); 633406a407f1SDmitry Monakhov /* 633506a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 633606a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 633706a407f1SDmitry Monakhov * transaction_commit will do it for us. 633806a407f1SDmitry Monakhov */ 6339bda32530STheodore Ts'o if (sbi->s_journal) { 634006a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 634106a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 634206a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 634306a407f1SDmitry Monakhov needs_barrier = true; 634406a407f1SDmitry Monakhov 63458d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6346ac27a0ecSDave Kleikamp if (wait) 6347bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6348bda32530STheodore Ts'o target); 63490390131bSFrank Mayhar } 6350bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6351bda32530STheodore Ts'o needs_barrier = true; 635206a407f1SDmitry Monakhov if (needs_barrier) { 635306a407f1SDmitry Monakhov int err; 6354c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 635506a407f1SDmitry Monakhov if (!ret) 635606a407f1SDmitry Monakhov ret = err; 635706a407f1SDmitry Monakhov } 635806a407f1SDmitry Monakhov 635906a407f1SDmitry Monakhov return ret; 636006a407f1SDmitry Monakhov } 636106a407f1SDmitry Monakhov 6362ac27a0ecSDave Kleikamp /* 6363ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6364ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6365be4f27d3SYongqiang Yang * 6366be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 63678e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 63688e8ad8a5SJan Kara * modifications. 6369ac27a0ecSDave Kleikamp */ 6370c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6371ac27a0ecSDave Kleikamp { 6372c4be0c1dSTakashi Sato int error = 0; 637398175720SJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6374ac27a0ecSDave Kleikamp 6375bb044576STheodore Ts'o if (journal) { 6376ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6377dab291afSMingming Cao jbd2_journal_lock_updates(journal); 63787ffe1ea8SHidehiro Kawai 63797ffe1ea8SHidehiro Kawai /* 6380bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6381bb044576STheodore Ts'o * flush the journal. 63827ffe1ea8SHidehiro Kawai */ 638301d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 63846b0310fbSEric Sandeen if (error < 0) 63856b0310fbSEric Sandeen goto out; 6386ac27a0ecSDave Kleikamp 6387ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6388e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 638902f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 639002f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6391c642dc9eSEric Sandeen } 6392c642dc9eSEric Sandeen 63934392fbc4SJan Kara error = ext4_commit_super(sb); 63946b0310fbSEric Sandeen out: 6395bb044576STheodore Ts'o if (journal) 63968e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6397bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 63986b0310fbSEric Sandeen return error; 6399ac27a0ecSDave Kleikamp } 6400ac27a0ecSDave Kleikamp 6401ac27a0ecSDave Kleikamp /* 6402ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6403ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6404ac27a0ecSDave Kleikamp */ 6405c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6406ac27a0ecSDave Kleikamp { 6407eb8ab444SJan Kara if (ext4_forced_shutdown(sb)) 64089ca92389STheodore Ts'o return 0; 64099ca92389STheodore Ts'o 6410c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 64119ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6412e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 641302f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 641402f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6415c642dc9eSEric Sandeen } 6416c642dc9eSEric Sandeen 64174392fbc4SJan Kara ext4_commit_super(sb); 6418c4be0c1dSTakashi Sato return 0; 6419ac27a0ecSDave Kleikamp } 6420ac27a0ecSDave Kleikamp 6421673c6100STheodore Ts'o /* 6422673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6423673c6100STheodore Ts'o */ 6424673c6100STheodore Ts'o struct ext4_mount_options { 6425673c6100STheodore Ts'o unsigned long s_mount_opt; 6426a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 642708cefc7aSEric W. Biederman kuid_t s_resuid; 642808cefc7aSEric W. Biederman kgid_t s_resgid; 6429673c6100STheodore Ts'o unsigned long s_commit_interval; 6430673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6431673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6432673c6100STheodore Ts'o int s_jquota_fmt; 6433a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6434673c6100STheodore Ts'o #endif 6435673c6100STheodore Ts'o }; 6436673c6100STheodore Ts'o 6437960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6438ac27a0ecSDave Kleikamp { 64397edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6440617ba13bSMingming Cao struct ext4_super_block *es; 6441617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6442960e0ab6SLukas Czerner unsigned long old_sb_flags; 6443617ba13bSMingming Cao struct ext4_mount_options old_opts; 64448a266467STheodore Ts'o ext4_group_t g; 6445c5e06d10SJohann Lombardi int err = 0; 6446ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 64473bbef91bSAustin Kim int enable_quota = 0; 644803dafb5fSChen Gang int i, j; 644933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6450ac27a0ecSDave Kleikamp #endif 6451b237e304SHarshad Shirwadkar 645221ac738eSChengguang Xu 6453ac27a0ecSDave Kleikamp /* Store the original options */ 6454ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6455ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6456a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6457ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6458ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6459ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 646030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 646130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6462ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6463ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6464a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 646503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 646633458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 646733458eabSTheodore Ts'o 646833458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 646903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 647003dafb5fSChen Gang for (j = 0; j < i; j++) 647103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 647203dafb5fSChen Gang return -ENOMEM; 647303dafb5fSChen Gang } 647403dafb5fSChen Gang } else 647503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6476ac27a0ecSDave Kleikamp #endif 6477e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6478b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 64797edfd85bSLukas Czerner ctx->journal_ioprio = 6480b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6481e4e58e5dSOjaswin Mujoo else 6482e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6483e4e58e5dSOjaswin Mujoo 6484e4e58e5dSOjaswin Mujoo } 6485ac27a0ecSDave Kleikamp 64867edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6487ac27a0ecSDave Kleikamp 64886b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 64896b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 64906b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 64912d5b86e0SEric Sandeen "during remount not supported; ignoring"); 64922d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6493c6d3d56dSDarrick J. Wong } 6494c6d3d56dSDarrick J. Wong 64956ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 64966ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 64976ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64986ae6514bSPiotr Sarna "both data=journal and delalloc"); 64996ae6514bSPiotr Sarna err = -EINVAL; 65006ae6514bSPiotr Sarna goto restore_opts; 65016ae6514bSPiotr Sarna } 65026ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 65036ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 65046ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 65056ae6514bSPiotr Sarna err = -EINVAL; 65066ae6514bSPiotr Sarna goto restore_opts; 65076ae6514bSPiotr Sarna } 6508ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6509ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6510ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6511ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6512ab04df78SJan Kara err = -EINVAL; 6513ab04df78SJan Kara goto restore_opts; 6514ab04df78SJan Kara } 6515923ae0ffSRoss Zwisler } 6516923ae0ffSRoss Zwisler 6517cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6518cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6519cdb7ee4cSTahsin Erdogan err = -EINVAL; 6520cdb7ee4cSTahsin Erdogan goto restore_opts; 6521cdb7ee4cSTahsin Erdogan } 6522cdb7ee4cSTahsin Erdogan 652322b8d707SJan Kara if (test_opt2(sb, ABORT)) 6524124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6525ac27a0ecSDave Kleikamp 65261751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 65271751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6528ac27a0ecSDave Kleikamp 6529ac27a0ecSDave Kleikamp es = sbi->s_es; 6530ac27a0ecSDave Kleikamp 6531b3881f74STheodore Ts'o if (sbi->s_journal) { 6532617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 65337edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6534b3881f74STheodore Ts'o } 6535ac27a0ecSDave Kleikamp 6536c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6537bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 6538c92dc856SJan Kara 6539960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 654095257987SJan Kara if (ext4_forced_shutdown(sb)) { 6541ac27a0ecSDave Kleikamp err = -EROFS; 6542ac27a0ecSDave Kleikamp goto restore_opts; 6543ac27a0ecSDave Kleikamp } 6544ac27a0ecSDave Kleikamp 6545960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 654638c03b34STheodore Ts'o err = sync_filesystem(sb); 654738c03b34STheodore Ts'o if (err < 0) 654838c03b34STheodore Ts'o goto restore_opts; 65490f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 65500f0dd62fSChristoph Hellwig if (err < 0) 6551c79d967dSChristoph Hellwig goto restore_opts; 6552c79d967dSChristoph Hellwig 6553ac27a0ecSDave Kleikamp /* 6554ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6555ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6556ac27a0ecSDave Kleikamp */ 65571751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6558ac27a0ecSDave Kleikamp 6559ac27a0ecSDave Kleikamp /* 6560ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6561ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6562ac27a0ecSDave Kleikamp * mark the partition as valid again. 6563ac27a0ecSDave Kleikamp */ 6564617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6565617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6566ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6567ac27a0ecSDave Kleikamp 656811215630SJan Kara if (sbi->s_journal) { 656911215630SJan Kara /* 657011215630SJan Kara * We let remount-ro finish even if marking fs 657111215630SJan Kara * as clean failed... 657211215630SJan Kara */ 6573617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 657411215630SJan Kara } 6575ac27a0ecSDave Kleikamp } else { 6576a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6577e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 65782cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6579ac27a0ecSDave Kleikamp err = -EROFS; 6580ac27a0ecSDave Kleikamp goto restore_opts; 6581ac27a0ecSDave Kleikamp } 6582ead6596bSEric Sandeen /* 65838a266467STheodore Ts'o * Make sure the group descriptor checksums 65840b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 65858a266467STheodore Ts'o */ 65868a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 65878a266467STheodore Ts'o struct ext4_group_desc *gdp = 65888a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 65898a266467STheodore Ts'o 6590feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6591b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6592b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6593e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 65948a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 65956a797d27SDarrick J. Wong err = -EFSBADCRC; 65968a266467STheodore Ts'o goto restore_opts; 65978a266467STheodore Ts'o } 65988a266467STheodore Ts'o } 65998a266467STheodore Ts'o 66008a266467STheodore Ts'o /* 6601ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6602ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6603ead6596bSEric Sandeen * require a full umount/remount for now. 6604ead6596bSEric Sandeen */ 660502f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6606b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6607ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6608ead6596bSEric Sandeen "orphan inode list. Please " 6609b31e1552SEric Sandeen "umount/remount instead"); 6610ead6596bSEric Sandeen err = -EINVAL; 6611ead6596bSEric Sandeen goto restore_opts; 6612ead6596bSEric Sandeen } 6613ead6596bSEric Sandeen 6614ac27a0ecSDave Kleikamp /* 6615ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6616ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6617ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6618ac27a0ecSDave Kleikamp * the partition.) 6619ac27a0ecSDave Kleikamp */ 662011215630SJan Kara if (sbi->s_journal) { 662111215630SJan Kara err = ext4_clear_journal_err(sb, es); 662211215630SJan Kara if (err) 662311215630SJan Kara goto restore_opts; 662411215630SJan Kara } 6625c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6626c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6627c89128a0SJaegeuk Kim 6628c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6629c89128a0SJaegeuk Kim if (err) 6630c89128a0SJaegeuk Kim goto restore_opts; 6631c89128a0SJaegeuk Kim 66321b292439STheodore Ts'o sb->s_flags &= ~SB_RDONLY; 66333b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb)) { 66343b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, 66353b50d501STheodore Ts'o le64_to_cpu(es->s_mmp_block)); 66363b50d501STheodore Ts'o if (err) 6637c5e06d10SJohann Lombardi goto restore_opts; 6638c5e06d10SJohann Lombardi } 66393bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6640c79d967dSChristoph Hellwig enable_quota = 1; 66413bbef91bSAustin Kim #endif 6642ac27a0ecSDave Kleikamp } 6643ac27a0ecSDave Kleikamp } 6644bfff6873SLukas Czerner 6645bfff6873SLukas Czerner /* 66460f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 66470f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 66480f5bde1dSJan Kara * succeed. 66490f5bde1dSJan Kara */ 6650dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6651d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6652d176b1f6SJan Kara if (err) 6653d176b1f6SJan Kara goto restore_opts; 66540f5bde1dSJan Kara } 6655d176b1f6SJan Kara 6656c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 66574392fbc4SJan Kara err = ext4_commit_super(sb); 6658c89128a0SJaegeuk Kim if (err) 6659c89128a0SJaegeuk Kim goto restore_opts; 6660c89128a0SJaegeuk Kim } 66610390131bSFrank Mayhar 6662ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 66637c319d32SAditya Kali if (enable_quota) { 66647c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 66650f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6666e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 66677c319d32SAditya Kali err = ext4_enable_quotas(sb); 666807724f98STheodore Ts'o if (err) 66697c319d32SAditya Kali goto restore_opts; 66707c319d32SAditya Kali } 66717c319d32SAditya Kali } 66724c0b4818STheodore Ts'o /* Release old quota file names */ 66734c0b4818STheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 66744c0b4818STheodore Ts'o kfree(old_opts.s_qf_names[i]); 66757c319d32SAditya Kali #endif 6676dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66770f5bde1dSJan Kara ext4_release_system_zone(sb); 6678d4c402d9SCurt Wohlgemuth 6679eb1f822cSTheodore Ts'o /* 6680eb1f822cSTheodore Ts'o * Reinitialize lazy itable initialization thread based on 6681eb1f822cSTheodore Ts'o * current settings 6682eb1f822cSTheodore Ts'o */ 6683eb1f822cSTheodore Ts'o if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6684eb1f822cSTheodore Ts'o ext4_unregister_li_request(sb); 6685eb1f822cSTheodore Ts'o else { 6686eb1f822cSTheodore Ts'o ext4_group_t first_not_zeroed; 6687eb1f822cSTheodore Ts'o first_not_zeroed = ext4_has_uninit_itable(sb); 6688eb1f822cSTheodore Ts'o ext4_register_li_request(sb, first_not_zeroed); 6689eb1f822cSTheodore Ts'o } 6690eb1f822cSTheodore Ts'o 669161bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 669261bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 669361bb4a1cSTheodore Ts'o 6694ac27a0ecSDave Kleikamp return 0; 66950b8e58a1SAndreas Dilger 6696ac27a0ecSDave Kleikamp restore_opts: 66974c0b4818STheodore Ts'o /* 66984c0b4818STheodore Ts'o * If there was a failing r/w to ro transition, we may need to 66994c0b4818STheodore Ts'o * re-enable quota 67004c0b4818STheodore Ts'o */ 6701d5d020b3SJan Kara if (sb_rdonly(sb) && !(old_sb_flags & SB_RDONLY) && 67024c0b4818STheodore Ts'o sb_any_quota_suspended(sb)) 67034c0b4818STheodore Ts'o dquot_resume(sb, -1); 6704ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6705ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6706a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6707ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6708ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6709ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 671030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 671130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6712dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 67130f5bde1dSJan Kara ext4_release_system_zone(sb); 6714ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6715ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6716a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 671733458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 671833458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6719ac27a0ecSDave Kleikamp } 672033458eabSTheodore Ts'o synchronize_rcu(); 672133458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 672233458eabSTheodore Ts'o kfree(to_free[i]); 6723ac27a0ecSDave Kleikamp #endif 672461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 672561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6726ac27a0ecSDave Kleikamp return err; 6727ac27a0ecSDave Kleikamp } 6728ac27a0ecSDave Kleikamp 6729cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 67307edfd85bSLukas Czerner { 6731cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 67327edfd85bSLukas Czerner int ret; 67337edfd85bSLukas Czerner 6734cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 67357edfd85bSLukas Czerner 6736cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 67377edfd85bSLukas Czerner if (ret < 0) 67387edfd85bSLukas Czerner return ret; 6739cebe85d5SLukas Czerner 6740960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6741cebe85d5SLukas Czerner if (ret < 0) 6742cebe85d5SLukas Czerner return ret; 6743cebe85d5SLukas Czerner 67446dcc98fbSTheodore Ts'o ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.", 67456dcc98fbSTheodore Ts'o &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w", 67466dcc98fbSTheodore Ts'o ext4_quota_mode(sb)); 6747cebe85d5SLukas Czerner 6748cebe85d5SLukas Czerner return 0; 67497edfd85bSLukas Czerner } 67507edfd85bSLukas Czerner 6751689c958cSLi Xi #ifdef CONFIG_QUOTA 6752689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6753689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6754689c958cSLi Xi { 6755689c958cSLi Xi struct kqid qid; 6756689c958cSLi Xi struct dquot *dquot; 6757689c958cSLi Xi u64 limit; 6758689c958cSLi Xi u64 curblock; 6759689c958cSLi Xi 6760689c958cSLi Xi qid = make_kqid_projid(projid); 6761689c958cSLi Xi dquot = dqget(sb, qid); 6762689c958cSLi Xi if (IS_ERR(dquot)) 6763689c958cSLi Xi return PTR_ERR(dquot); 67647b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6765689c958cSLi Xi 6766a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6767a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 676857c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 676957c32ea4SChengguang Xu 6770689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6771f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6772f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6773689c958cSLi Xi buf->f_blocks = limit; 6774689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6775689c958cSLi Xi (buf->f_blocks > curblock) ? 6776689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6777689c958cSLi Xi } 6778689c958cSLi Xi 6779a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6780a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6781689c958cSLi Xi if (limit && buf->f_files > limit) { 6782689c958cSLi Xi buf->f_files = limit; 6783689c958cSLi Xi buf->f_ffree = 6784689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6785689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6786689c958cSLi Xi } 6787689c958cSLi Xi 67887b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6789689c958cSLi Xi dqput(dquot); 6790689c958cSLi Xi return 0; 6791689c958cSLi Xi } 6792689c958cSLi Xi #endif 6793689c958cSLi Xi 6794617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6795ac27a0ecSDave Kleikamp { 6796ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6797617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6798617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 679927dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6800d02a9391SKazuya Mio s64 bfree; 680127dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6802ac27a0ecSDave Kleikamp 6803952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6804952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6805ac27a0ecSDave Kleikamp 6806617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6807ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6808b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 680957042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 681057042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6811d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 681257042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 681327dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 681427dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 681527dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6816ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6817ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 681852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6819617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 68209591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 68210b8e58a1SAndreas Dilger 6822689c958cSLi Xi #ifdef CONFIG_QUOTA 6823689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6824689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6825689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6826689c958cSLi Xi #endif 6827ac27a0ecSDave Kleikamp return 0; 6828ac27a0ecSDave Kleikamp } 6829ac27a0ecSDave Kleikamp 6830ac27a0ecSDave Kleikamp 6831ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6832ac27a0ecSDave Kleikamp 6833bc8230eeSJan Kara /* 6834bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6835bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6836bc8230eeSJan Kara */ 6837ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6838ac27a0ecSDave Kleikamp { 68394c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6840ac27a0ecSDave Kleikamp } 6841ac27a0ecSDave Kleikamp 6842617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6843ac27a0ecSDave Kleikamp { 6844ac27a0ecSDave Kleikamp int ret, err; 6845ac27a0ecSDave Kleikamp handle_t *handle; 6846ac27a0ecSDave Kleikamp struct inode *inode; 6847ac27a0ecSDave Kleikamp 6848ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 68499924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6850617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6851ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6852ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6853ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6854617ba13bSMingming Cao err = ext4_journal_stop(handle); 6855ac27a0ecSDave Kleikamp if (!ret) 6856ac27a0ecSDave Kleikamp ret = err; 6857ac27a0ecSDave Kleikamp return ret; 6858ac27a0ecSDave Kleikamp } 6859ac27a0ecSDave Kleikamp 6860617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6861ac27a0ecSDave Kleikamp { 6862ac27a0ecSDave Kleikamp int ret, err; 6863ac27a0ecSDave Kleikamp handle_t *handle; 6864ac27a0ecSDave Kleikamp 68659924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6866617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6867ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6868ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6869ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6870617ba13bSMingming Cao err = ext4_journal_stop(handle); 6871ac27a0ecSDave Kleikamp if (!ret) 6872ac27a0ecSDave Kleikamp ret = err; 6873ac27a0ecSDave Kleikamp return ret; 6874ac27a0ecSDave Kleikamp } 6875ac27a0ecSDave Kleikamp 6876617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6877ac27a0ecSDave Kleikamp { 6878ac27a0ecSDave Kleikamp int ret, err; 6879ac27a0ecSDave Kleikamp handle_t *handle; 6880ac27a0ecSDave Kleikamp 68819924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6882617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 68839c3013e9SJan Kara if (IS_ERR(handle)) { 68849c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 68859c3013e9SJan Kara dquot_release(dquot); 6886ac27a0ecSDave Kleikamp return PTR_ERR(handle); 68879c3013e9SJan Kara } 6888ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6889617ba13bSMingming Cao err = ext4_journal_stop(handle); 6890ac27a0ecSDave Kleikamp if (!ret) 6891ac27a0ecSDave Kleikamp ret = err; 6892ac27a0ecSDave Kleikamp return ret; 6893ac27a0ecSDave Kleikamp } 6894ac27a0ecSDave Kleikamp 6895617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6896ac27a0ecSDave Kleikamp { 6897262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6898262b4662SJan Kara 6899f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6900ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6901617ba13bSMingming Cao return ext4_write_dquot(dquot); 6902ac27a0ecSDave Kleikamp } else { 6903ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6904ac27a0ecSDave Kleikamp } 6905ac27a0ecSDave Kleikamp } 6906ac27a0ecSDave Kleikamp 6907617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6908ac27a0ecSDave Kleikamp { 6909ac27a0ecSDave Kleikamp int ret, err; 6910ac27a0ecSDave Kleikamp handle_t *handle; 6911ac27a0ecSDave Kleikamp 6912ac27a0ecSDave Kleikamp /* Data block + inode block */ 6913f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6914ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6915ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6916ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6917617ba13bSMingming Cao err = ext4_journal_stop(handle); 6918ac27a0ecSDave Kleikamp if (!ret) 6919ac27a0ecSDave Kleikamp ret = err; 6920ac27a0ecSDave Kleikamp return ret; 6921ac27a0ecSDave Kleikamp } 6922ac27a0ecSDave Kleikamp 6923daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6924daf647d2STheodore Ts'o { 6925daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6926daf647d2STheodore Ts'o 6927daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6928daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6929daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6930daf647d2STheodore Ts'o * because the name of the lock is set using the 6931daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6932daf647d2STheodore Ts'o */ 6933daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6934daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6935daf647d2STheodore Ts'o } 6936daf647d2STheodore Ts'o 6937ac27a0ecSDave Kleikamp /* 6938ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6939ac27a0ecSDave Kleikamp */ 6940617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 69418c54ca9cSAl Viro const struct path *path) 6942ac27a0ecSDave Kleikamp { 6943ac27a0ecSDave Kleikamp int err; 6944ac27a0ecSDave Kleikamp 6945ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6946ac27a0ecSDave Kleikamp return -EINVAL; 69470623543bSJan Kara 6948ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6949d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6950ac27a0ecSDave Kleikamp return -EXDEV; 6951e0770e91SJan Kara 6952e0770e91SJan Kara /* Quota already enabled for this file? */ 6953e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6954e0770e91SJan Kara return -EBUSY; 6955e0770e91SJan Kara 69560623543bSJan Kara /* Journaling quota? */ 69570623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 69582b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6959f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6960b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6961b31e1552SEric Sandeen "Quota file not on filesystem root. " 6962b31e1552SEric Sandeen "Journaled quota will not work"); 696391389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 696491389240SJan Kara } else { 696591389240SJan Kara /* 696691389240SJan Kara * Clear the flag just in case mount options changed since 696791389240SJan Kara * last time. 696891389240SJan Kara */ 696991389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 69700623543bSJan Kara } 69710623543bSJan Kara 6972daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6973daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 697415fc69bbSJan Kara if (!err) { 6975957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6976957153fcSJan Kara handle_t *handle; 6977957153fcSJan Kara 697861a92987SJan Kara /* 697961a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 698061a92987SJan Kara * files. If this fails, we return success anyway since quotas 698161a92987SJan Kara * are already enabled and this is not a hard failure. 698261a92987SJan Kara */ 6983957153fcSJan Kara inode_lock(inode); 6984957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6985957153fcSJan Kara if (IS_ERR(handle)) 6986957153fcSJan Kara goto unlock_inode; 6987957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6988957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6989957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 69904209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6991957153fcSJan Kara ext4_journal_stop(handle); 6992957153fcSJan Kara unlock_inode: 6993957153fcSJan Kara inode_unlock(inode); 699415fc69bbSJan Kara if (err) 699515fc69bbSJan Kara dquot_quota_off(sb, type); 6996957153fcSJan Kara } 699715fc69bbSJan Kara if (err) 699815fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 699915fc69bbSJan Kara I_DATA_SEM_NORMAL); 7000daf647d2STheodore Ts'o return err; 7001ac27a0ecSDave Kleikamp } 7002ac27a0ecSDave Kleikamp 700307342ec2SBaokun Li static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum) 700407342ec2SBaokun Li { 700507342ec2SBaokun Li switch (type) { 700607342ec2SBaokun Li case USRQUOTA: 700707342ec2SBaokun Li return qf_inum == EXT4_USR_QUOTA_INO; 700807342ec2SBaokun Li case GRPQUOTA: 700907342ec2SBaokun Li return qf_inum == EXT4_GRP_QUOTA_INO; 701007342ec2SBaokun Li case PRJQUOTA: 701107342ec2SBaokun Li return qf_inum >= EXT4_GOOD_OLD_FIRST_INO; 701207342ec2SBaokun Li default: 701307342ec2SBaokun Li BUG(); 701407342ec2SBaokun Li } 701507342ec2SBaokun Li } 701607342ec2SBaokun Li 70177c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 70187c319d32SAditya Kali unsigned int flags) 70197c319d32SAditya Kali { 70207c319d32SAditya Kali int err; 70217c319d32SAditya Kali struct inode *qf_inode; 7022a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 70237c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 7024689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 7025689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 70267c319d32SAditya Kali }; 70277c319d32SAditya Kali 7028e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 70297c319d32SAditya Kali 70307c319d32SAditya Kali if (!qf_inums[type]) 70317c319d32SAditya Kali return -EPERM; 70327c319d32SAditya Kali 703307342ec2SBaokun Li if (!ext4_check_quota_inum(type, qf_inums[type])) { 703407342ec2SBaokun Li ext4_error(sb, "Bad quota inum: %lu, type: %d", 703507342ec2SBaokun Li qf_inums[type], type); 703607342ec2SBaokun Li return -EUCLEAN; 703707342ec2SBaokun Li } 703807342ec2SBaokun Li 70398a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 70407c319d32SAditya Kali if (IS_ERR(qf_inode)) { 704107342ec2SBaokun Li ext4_error(sb, "Bad quota inode: %lu, type: %d", 704207342ec2SBaokun Li qf_inums[type], type); 70437c319d32SAditya Kali return PTR_ERR(qf_inode); 70447c319d32SAditya Kali } 70457c319d32SAditya Kali 7046bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 7047bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 7048daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 70497212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 7050daf647d2STheodore Ts'o if (err) 7051daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 705261157b24SPan Bian iput(qf_inode); 70537c319d32SAditya Kali 70547c319d32SAditya Kali return err; 70557c319d32SAditya Kali } 70567c319d32SAditya Kali 70577c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 705825c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 70597c319d32SAditya Kali { 70607c319d32SAditya Kali int type, err = 0; 7061a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 70627c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 7063689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 7064689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 70657c319d32SAditya Kali }; 706649da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 706749da9392SJan Kara test_opt(sb, USRQUOTA), 706849da9392SJan Kara test_opt(sb, GRPQUOTA), 706949da9392SJan Kara test_opt(sb, PRJQUOTA), 707049da9392SJan Kara }; 70717c319d32SAditya Kali 707291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 7073a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 70747c319d32SAditya Kali if (qf_inums[type]) { 70757c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 707649da9392SJan Kara DQUOT_USAGE_ENABLED | 707749da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 70787c319d32SAditya Kali if (err) { 70797c319d32SAditya Kali ext4_warning(sb, 708072ba7450STheodore Ts'o "Failed to enable quota tracking " 708107342ec2SBaokun Li "(type=%d, err=%d, ino=%lu). " 708207342ec2SBaokun Li "Please run e2fsck to fix.", type, 708307342ec2SBaokun Li err, qf_inums[type]); 70844013d47aSJan Kara 7085f3c1c42eSBaokun Li ext4_quotas_off(sb, type); 70867c319d32SAditya Kali return err; 70877c319d32SAditya Kali } 70887c319d32SAditya Kali } 70897c319d32SAditya Kali } 70907c319d32SAditya Kali return 0; 70917c319d32SAditya Kali } 70927c319d32SAditya Kali 7093ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 7094ca0e05e4SDmitry Monakhov { 709521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 709621f97697SJan Kara handle_t *handle; 7097957153fcSJan Kara int err; 709821f97697SJan Kara 709987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 710087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 710187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 7102ca0e05e4SDmitry Monakhov sync_filesystem(sb); 7103ca0e05e4SDmitry Monakhov 7104957153fcSJan Kara if (!inode || !igrab(inode)) 71050b268590SAmir Goldstein goto out; 71060b268590SAmir Goldstein 7107957153fcSJan Kara err = dquot_quota_off(sb, type); 7108964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 7109957153fcSJan Kara goto out_put; 7110e0e985f3SJan Kara /* 7111e0e985f3SJan Kara * When the filesystem was remounted read-only first, we cannot cleanup 7112e0e985f3SJan Kara * inode flags here. Bad luck but people should be using QUOTA feature 7113e0e985f3SJan Kara * these days anyway. 7114e0e985f3SJan Kara */ 7115e0e985f3SJan Kara if (sb_rdonly(sb)) 7116e0e985f3SJan Kara goto out_put; 7117957153fcSJan Kara 7118957153fcSJan Kara inode_lock(inode); 711961a92987SJan Kara /* 712061a92987SJan Kara * Update modification times of quota files when userspace can 712161a92987SJan Kara * start looking at them. If we fail, we return success anyway since 712261a92987SJan Kara * this is not a hard failure and quotas are already disabled. 712361a92987SJan Kara */ 71249924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 71254209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 71264209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7127957153fcSJan Kara goto out_unlock; 71284209ae12SHarshad Shirwadkar } 7129957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7130957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 71311bc33893SJeff Layton inode->i_mtime = inode_set_ctime_current(inode); 71324209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 713321f97697SJan Kara ext4_journal_stop(handle); 7134957153fcSJan Kara out_unlock: 7135957153fcSJan Kara inode_unlock(inode); 7136957153fcSJan Kara out_put: 7137964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7138957153fcSJan Kara iput(inode); 7139957153fcSJan Kara return err; 714021f97697SJan Kara out: 7141ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7142ca0e05e4SDmitry Monakhov } 7143ca0e05e4SDmitry Monakhov 7144ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7145ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7146ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7147ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7148617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7149ac27a0ecSDave Kleikamp size_t len, loff_t off) 7150ac27a0ecSDave Kleikamp { 7151ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7152725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7153ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7154ac27a0ecSDave Kleikamp int tocopy; 7155ac27a0ecSDave Kleikamp size_t toread; 7156ac27a0ecSDave Kleikamp struct buffer_head *bh; 7157ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7158ac27a0ecSDave Kleikamp 7159ac27a0ecSDave Kleikamp if (off > i_size) 7160ac27a0ecSDave Kleikamp return 0; 7161ac27a0ecSDave Kleikamp if (off+len > i_size) 7162ac27a0ecSDave Kleikamp len = i_size-off; 7163ac27a0ecSDave Kleikamp toread = len; 7164ac27a0ecSDave Kleikamp while (toread > 0) { 716566267814SJiangshan Yi tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 71661c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 71671c215028STheodore Ts'o if (IS_ERR(bh)) 71681c215028STheodore Ts'o return PTR_ERR(bh); 7169ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7170ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7171ac27a0ecSDave Kleikamp else 7172ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7173ac27a0ecSDave Kleikamp brelse(bh); 7174ac27a0ecSDave Kleikamp offset = 0; 7175ac27a0ecSDave Kleikamp toread -= tocopy; 7176ac27a0ecSDave Kleikamp data += tocopy; 7177ac27a0ecSDave Kleikamp blk++; 7178ac27a0ecSDave Kleikamp } 7179ac27a0ecSDave Kleikamp return len; 7180ac27a0ecSDave Kleikamp } 7181ac27a0ecSDave Kleikamp 7182ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7183ac27a0ecSDave Kleikamp * enough credits) */ 7184617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7185ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7186ac27a0ecSDave Kleikamp { 7187ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7188725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 71894209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7190c5e298aeSTheodore Ts'o int retries = 0; 7191ac27a0ecSDave Kleikamp struct buffer_head *bh; 7192ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7193ac27a0ecSDave Kleikamp 7194380a0091SYe Bin if (!handle) { 7195b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7196b31e1552SEric Sandeen " cancelled because transaction is not started", 71979c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 71989c3013e9SJan Kara return -EIO; 71999c3013e9SJan Kara } 720067eeb568SDmitry Monakhov /* 720167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 720267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 720367eeb568SDmitry Monakhov */ 720467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 720567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 720667eeb568SDmitry Monakhov " cancelled because not block aligned", 720767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 720867eeb568SDmitry Monakhov return -EIO; 720967eeb568SDmitry Monakhov } 721067eeb568SDmitry Monakhov 7211c5e298aeSTheodore Ts'o do { 7212c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7213c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7214c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 721545586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7216c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 72171c215028STheodore Ts'o if (IS_ERR(bh)) 72181c215028STheodore Ts'o return PTR_ERR(bh); 7219ac27a0ecSDave Kleikamp if (!bh) 7220ac27a0ecSDave Kleikamp goto out; 72215d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7222188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7223ac27a0ecSDave Kleikamp if (err) { 7224ac27a0ecSDave Kleikamp brelse(bh); 72251c215028STheodore Ts'o return err; 7226ac27a0ecSDave Kleikamp } 7227ac27a0ecSDave Kleikamp lock_buffer(bh); 722867eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7229ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7230ac27a0ecSDave Kleikamp unlock_buffer(bh); 72310390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7232ac27a0ecSDave Kleikamp brelse(bh); 7233ac27a0ecSDave Kleikamp out: 723467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 723567eeb568SDmitry Monakhov i_size_write(inode, off + len); 7236617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 72374209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 72384209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 72394209ae12SHarshad Shirwadkar err = err2; 724021f97697SJan Kara } 72414209ae12SHarshad Shirwadkar return err ? err : len; 7242ac27a0ecSDave Kleikamp } 7243ac27a0ecSDave Kleikamp #endif 7244ac27a0ecSDave Kleikamp 7245c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 724624b58424STheodore Ts'o static inline void register_as_ext2(void) 724724b58424STheodore Ts'o { 724824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 724924b58424STheodore Ts'o if (err) 725024b58424STheodore Ts'o printk(KERN_WARNING 725124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 725224b58424STheodore Ts'o } 725324b58424STheodore Ts'o 725424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 725524b58424STheodore Ts'o { 725624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 725724b58424STheodore Ts'o } 72582035e776STheodore Ts'o 72592035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 72602035e776STheodore Ts'o { 7261e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 72622035e776STheodore Ts'o return 0; 7263bc98a42cSDavid Howells if (sb_rdonly(sb)) 72642035e776STheodore Ts'o return 1; 7265e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 72662035e776STheodore Ts'o return 0; 72672035e776STheodore Ts'o return 1; 72682035e776STheodore Ts'o } 726924b58424STheodore Ts'o #else 727024b58424STheodore Ts'o static inline void register_as_ext2(void) { } 727124b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 72722035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 727324b58424STheodore Ts'o #endif 727424b58424STheodore Ts'o 727524b58424STheodore Ts'o static inline void register_as_ext3(void) 727624b58424STheodore Ts'o { 727724b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 727824b58424STheodore Ts'o if (err) 727924b58424STheodore Ts'o printk(KERN_WARNING 728024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 728124b58424STheodore Ts'o } 728224b58424STheodore Ts'o 728324b58424STheodore Ts'o static inline void unregister_as_ext3(void) 728424b58424STheodore Ts'o { 728524b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 728624b58424STheodore Ts'o } 72872035e776STheodore Ts'o 72882035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 72892035e776STheodore Ts'o { 7290e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 72912035e776STheodore Ts'o return 0; 7292e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 72932035e776STheodore Ts'o return 0; 7294bc98a42cSDavid Howells if (sb_rdonly(sb)) 72952035e776STheodore Ts'o return 1; 7296e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 72972035e776STheodore Ts'o return 0; 72982035e776STheodore Ts'o return 1; 72992035e776STheodore Ts'o } 730024b58424STheodore Ts'o 73011489dffdSChristoph Hellwig static void ext4_kill_sb(struct super_block *sb) 73021489dffdSChristoph Hellwig { 73031489dffdSChristoph Hellwig struct ext4_sb_info *sbi = EXT4_SB(sb); 73041489dffdSChristoph Hellwig struct block_device *journal_bdev = sbi ? sbi->s_journal_bdev : NULL; 73051489dffdSChristoph Hellwig 73061489dffdSChristoph Hellwig kill_block_super(sb); 73071489dffdSChristoph Hellwig 73081489dffdSChristoph Hellwig if (journal_bdev) 73091489dffdSChristoph Hellwig blkdev_put(journal_bdev, sb); 73101489dffdSChristoph Hellwig } 73111489dffdSChristoph Hellwig 731203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7313ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 731403010a33STheodore Ts'o .name = "ext4", 7315cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7316cebe85d5SLukas Czerner .parameters = ext4_param_specs, 73171489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 731850ec1d72SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7319ac27a0ecSDave Kleikamp }; 73207f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7321ac27a0ecSDave Kleikamp 7322e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7323e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7324e9e3bcecSEric Sandeen 73255dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7326ac27a0ecSDave Kleikamp { 7327e9e3bcecSEric Sandeen int i, err; 7328c9de560dSAlex Tomas 7329e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 733007c0c5d8SAl Viro ext4_li_info = NULL; 733107c0c5d8SAl Viro 73329a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 733312e9b892SDmitry Monakhov ext4_check_flag_values(); 7334e9e3bcecSEric Sandeen 7335e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7336e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7337e9e3bcecSEric Sandeen 733851865fdaSZheng Liu err = ext4_init_es(); 73396fd058f7STheodore Ts'o if (err) 73406fd058f7STheodore Ts'o return err; 734151865fdaSZheng Liu 73421dc0aa46SEric Whitney err = ext4_init_pending(); 73431dc0aa46SEric Whitney if (err) 734422cfe4b4SEric Biggers goto out7; 734522cfe4b4SEric Biggers 734622cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 734722cfe4b4SEric Biggers if (err) 73481dc0aa46SEric Whitney goto out6; 73491dc0aa46SEric Whitney 735051865fdaSZheng Liu err = ext4_init_pageio(); 735151865fdaSZheng Liu if (err) 7352b5799018STheodore Ts'o goto out5; 735351865fdaSZheng Liu 73545dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7355bd2d0210STheodore Ts'o if (err) 7356b5799018STheodore Ts'o goto out4; 7357857ac889SLukas Czerner 7358b5799018STheodore Ts'o err = ext4_init_sysfs(); 7359dd68314cSTheodore Ts'o if (err) 7360b5799018STheodore Ts'o goto out3; 7361857ac889SLukas Czerner 73625dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7363ac27a0ecSDave Kleikamp if (err) 7364c9de560dSAlex Tomas goto out2; 7365ac27a0ecSDave Kleikamp err = init_inodecache(); 7366ac27a0ecSDave Kleikamp if (err) 7367ac27a0ecSDave Kleikamp goto out1; 7368aa75f4d3SHarshad Shirwadkar 7369aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7370aa75f4d3SHarshad Shirwadkar if (err) 7371aa75f4d3SHarshad Shirwadkar goto out05; 7372aa75f4d3SHarshad Shirwadkar 737324b58424STheodore Ts'o register_as_ext3(); 73742035e776STheodore Ts'o register_as_ext2(); 737503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7376ac27a0ecSDave Kleikamp if (err) 7377ac27a0ecSDave Kleikamp goto out; 7378bfff6873SLukas Czerner 7379ac27a0ecSDave Kleikamp return 0; 7380ac27a0ecSDave Kleikamp out: 738124b58424STheodore Ts'o unregister_as_ext2(); 738224b58424STheodore Ts'o unregister_as_ext3(); 7383ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7384aa75f4d3SHarshad Shirwadkar out05: 7385ac27a0ecSDave Kleikamp destroy_inodecache(); 7386ac27a0ecSDave Kleikamp out1: 73875dabfc78STheodore Ts'o ext4_exit_mballoc(); 73889c191f70ST Makphaibulchoke out2: 7389b5799018STheodore Ts'o ext4_exit_sysfs(); 7390b5799018STheodore Ts'o out3: 7391dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7392b5799018STheodore Ts'o out4: 73935dabfc78STheodore Ts'o ext4_exit_pageio(); 7394b5799018STheodore Ts'o out5: 739522cfe4b4SEric Biggers ext4_exit_post_read_processing(); 73961dc0aa46SEric Whitney out6: 739722cfe4b4SEric Biggers ext4_exit_pending(); 739822cfe4b4SEric Biggers out7: 739951865fdaSZheng Liu ext4_exit_es(); 740051865fdaSZheng Liu 7401ac27a0ecSDave Kleikamp return err; 7402ac27a0ecSDave Kleikamp } 7403ac27a0ecSDave Kleikamp 74045dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7405ac27a0ecSDave Kleikamp { 7406bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 740724b58424STheodore Ts'o unregister_as_ext2(); 740824b58424STheodore Ts'o unregister_as_ext3(); 740903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7410ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7411ac27a0ecSDave Kleikamp destroy_inodecache(); 74125dabfc78STheodore Ts'o ext4_exit_mballoc(); 7413b5799018STheodore Ts'o ext4_exit_sysfs(); 74145dabfc78STheodore Ts'o ext4_exit_system_zone(); 74155dabfc78STheodore Ts'o ext4_exit_pageio(); 741622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7417dd12ed14SEric Sandeen ext4_exit_es(); 74181dc0aa46SEric Whitney ext4_exit_pending(); 7419ac27a0ecSDave Kleikamp } 7420ac27a0ecSDave Kleikamp 7421ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 742283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7423ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 74247ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 74255dabfc78STheodore Ts'o module_init(ext4_init_fs) 74265dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7427