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); 96cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 97ac27a0ecSDave Kleikamp 98e74031fdSJan Kara /* 99e74031fdSJan Kara * Lock ordering 100e74031fdSJan Kara * 101e74031fdSJan Kara * page fault path: 102d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 103d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * buffered write path: 106c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 107e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 108e74031fdSJan Kara * i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * truncate: 111d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 112d4f5258eSJan Kara * page lock 113d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1141d39834fSNikolay Borisov * i_data_sem (rw) 115e74031fdSJan Kara * 116e74031fdSJan Kara * direct IO: 117c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1181d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 119e74031fdSJan Kara * 120e74031fdSJan Kara * writepages: 121e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 122e74031fdSJan Kara */ 123e74031fdSJan Kara 12402f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12502f960f8SLukas Czerner .parse_param = ext4_parse_param, 126cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 127cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 128cebe85d5SLukas Czerner .free = ext4_fc_free, 12902f960f8SLukas Czerner }; 13002f960f8SLukas Czerner 13102f960f8SLukas Czerner 132c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1332035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1342035e776STheodore Ts'o .owner = THIS_MODULE, 1352035e776STheodore Ts'o .name = "ext2", 136cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 137cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1382035e776STheodore Ts'o .kill_sb = kill_block_super, 1392035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1402035e776STheodore Ts'o }; 1417f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 142fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1432035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1442035e776STheodore Ts'o #else 1452035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1462035e776STheodore Ts'o #endif 1472035e776STheodore Ts'o 1482035e776STheodore Ts'o 149ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 150ba69f9abSJan Kara .owner = THIS_MODULE, 151ba69f9abSJan Kara .name = "ext3", 152cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 153cebe85d5SLukas Czerner .parameters = ext4_param_specs, 154ba69f9abSJan Kara .kill_sb = kill_block_super, 155ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 156ba69f9abSJan Kara }; 1577f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 158fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 159ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 160bd81d8eeSLaurent Vivier 161fa491b14Szhangyi (F) 16267c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fb265c9cSTheodore Ts'o /* 166fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 167fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 168fa491b14Szhangyi (F) * recheck the buffer contents. 169fa491b14Szhangyi (F) */ 170fa491b14Szhangyi (F) clear_buffer_verified(bh); 171fa491b14Szhangyi (F) 172fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 173fa491b14Szhangyi (F) get_bh(bh); 1741420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 17767c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 178fa491b14Szhangyi (F) bh_end_io_t *end_io) 179fa491b14Szhangyi (F) { 180fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 183fa491b14Szhangyi (F) unlock_buffer(bh); 184fa491b14Szhangyi (F) return; 185fa491b14Szhangyi (F) } 186fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 187fa491b14Szhangyi (F) } 188fa491b14Szhangyi (F) 18967c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) 190fa491b14Szhangyi (F) { 191fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 192fa491b14Szhangyi (F) 193fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 194fa491b14Szhangyi (F) unlock_buffer(bh); 195fa491b14Szhangyi (F) return 0; 196fa491b14Szhangyi (F) } 197fa491b14Szhangyi (F) 198fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 199fa491b14Szhangyi (F) 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) 20667c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) 207fa491b14Szhangyi (F) { 2080b73284cSZhang Yi lock_buffer(bh); 2090b73284cSZhang Yi if (!wait) { 210fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 211fa491b14Szhangyi (F) return 0; 212fa491b14Szhangyi (F) } 2130b73284cSZhang Yi return ext4_read_bh(bh, op_flags, NULL); 214fa491b14Szhangyi (F) } 215fa491b14Szhangyi (F) 216fb265c9cSTheodore Ts'o /* 2178394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 218fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 219fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 220fb265c9cSTheodore Ts'o * return. 221fb265c9cSTheodore Ts'o */ 2228394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 22367c0f556SBart Van Assche sector_t block, 22467c0f556SBart Van Assche blk_opf_t op_flags, gfp_t gfp) 225fb265c9cSTheodore Ts'o { 2262d069c08Szhangyi (F) struct buffer_head *bh; 2272d069c08Szhangyi (F) int ret; 228fb265c9cSTheodore Ts'o 2298394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 230fb265c9cSTheodore Ts'o if (bh == NULL) 231fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 232cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 233fb265c9cSTheodore Ts'o return bh; 2342d069c08Szhangyi (F) 2352d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2362d069c08Szhangyi (F) if (ret) { 237fb265c9cSTheodore Ts'o put_bh(bh); 2382d069c08Szhangyi (F) return ERR_PTR(ret); 2392d069c08Szhangyi (F) } 2402d069c08Szhangyi (F) return bh; 241fb265c9cSTheodore Ts'o } 242fb265c9cSTheodore Ts'o 2438394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 24467c0f556SBart Van Assche blk_opf_t op_flags) 2458394a6abSzhangyi (F) { 2468394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2478394a6abSzhangyi (F) } 2488394a6abSzhangyi (F) 2498394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2508394a6abSzhangyi (F) sector_t block) 2518394a6abSzhangyi (F) { 2528394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2538394a6abSzhangyi (F) } 2548394a6abSzhangyi (F) 2555df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2565df1d412Szhangyi (F) { 2575df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2585df1d412Szhangyi (F) 2595df1d412Szhangyi (F) if (likely(bh)) { 2600b73284cSZhang Yi if (trylock_buffer(bh)) 2610b73284cSZhang Yi ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL); 2625df1d412Szhangyi (F) brelse(bh); 2635df1d412Szhangyi (F) } 264c197855eSStephen Hemminger } 265a9c47317SDarrick J. Wong 266a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2679aa5d32bSDmitry Monakhov struct ext4_super_block *es) 268a9c47317SDarrick J. Wong { 269a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 270a9c47317SDarrick J. Wong return 1; 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27306db49e6STheodore Ts'o } 274a9c47317SDarrick J. Wong 275bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 276a9c47317SDarrick J. Wong struct ext4_super_block *es) 277a9c47317SDarrick J. Wong { 278a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 279a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 280a9c47317SDarrick J. Wong __u32 csum; 281a9c47317SDarrick J. Wong 282a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 283a9c47317SDarrick J. Wong 284a9c47317SDarrick J. Wong return cpu_to_le32(csum); 285a9c47317SDarrick J. Wong } 286a9c47317SDarrick J. Wong 287a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 288a9c47317SDarrick J. Wong struct ext4_super_block *es) 289a9c47317SDarrick J. Wong { 290a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 291a9c47317SDarrick J. Wong return 1; 292a9c47317SDarrick J. Wong 293a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 294a9c47317SDarrick J. Wong } 295a9c47317SDarrick J. Wong 296a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 297a9c47317SDarrick J. Wong { 29806db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 29906db49e6STheodore Ts'o 3009aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 301a9c47317SDarrick J. Wong return; 302a9c47317SDarrick J. Wong 303a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 304a9c47317SDarrick J. Wong } 305a9c47317SDarrick J. Wong 3068fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3078fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 308bd81d8eeSLaurent Vivier { 3093a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3108fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3118fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 312bd81d8eeSLaurent Vivier } 313bd81d8eeSLaurent Vivier 3148fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3158fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 316bd81d8eeSLaurent Vivier { 3175272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3188fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3198fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 320bd81d8eeSLaurent Vivier } 321bd81d8eeSLaurent Vivier 3228fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3238fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 324bd81d8eeSLaurent Vivier { 3255272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3268fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3278fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 328bd81d8eeSLaurent Vivier } 329bd81d8eeSLaurent Vivier 330021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 331560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 332560671a0SAneesh Kumar K.V { 333560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 334560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 335560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 336560671a0SAneesh Kumar K.V } 337560671a0SAneesh Kumar K.V 338560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 339560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 340560671a0SAneesh Kumar K.V { 341560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 342560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 343560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 344560671a0SAneesh Kumar K.V } 345560671a0SAneesh Kumar K.V 346560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 347560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 348560671a0SAneesh Kumar K.V { 349560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 350560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 351560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 352560671a0SAneesh Kumar K.V } 353560671a0SAneesh Kumar K.V 354560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 355560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 356560671a0SAneesh Kumar K.V { 357560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 358560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 359560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 360560671a0SAneesh Kumar K.V } 361560671a0SAneesh Kumar K.V 3628fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3638fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 364bd81d8eeSLaurent Vivier { 3653a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3668fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3678fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 368bd81d8eeSLaurent Vivier } 369bd81d8eeSLaurent Vivier 3708fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3718fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 372bd81d8eeSLaurent Vivier { 3735272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3748fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3758fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 376bd81d8eeSLaurent Vivier } 377bd81d8eeSLaurent Vivier 3788fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3798fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 380bd81d8eeSLaurent Vivier { 3815272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3828fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3838fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 384bd81d8eeSLaurent Vivier } 385bd81d8eeSLaurent Vivier 386021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 387560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 388560671a0SAneesh Kumar K.V { 389560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 390560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 391560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 392560671a0SAneesh Kumar K.V } 393560671a0SAneesh Kumar K.V 394560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 395560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 396560671a0SAneesh Kumar K.V { 397560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 398560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 399560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 400560671a0SAneesh Kumar K.V } 401560671a0SAneesh Kumar K.V 402560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 403560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 404560671a0SAneesh Kumar K.V { 405560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 406560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 407560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 408560671a0SAneesh Kumar K.V } 409560671a0SAneesh Kumar K.V 410560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 411560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 412560671a0SAneesh Kumar K.V { 413560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 414560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 415560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 416560671a0SAneesh Kumar K.V } 417560671a0SAneesh Kumar K.V 418c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4196a0678a7SArnd Bergmann { 4206a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4216a0678a7SArnd Bergmann 4226a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4236a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4246a0678a7SArnd Bergmann } 4256a0678a7SArnd Bergmann 4266a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4276a0678a7SArnd Bergmann { 4286a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4296a0678a7SArnd Bergmann } 4306a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 431c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 432c92dc856SJan Kara ktime_get_real_seconds()) 4336a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4346a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 435d3d1faf6SCurt Wohlgemuth 436bdfe0cbdSTheodore Ts'o /* 437bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 438bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 439bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 440bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 441bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 442bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 443bdfe0cbdSTheodore Ts'o */ 444bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 445bdfe0cbdSTheodore Ts'o { 446bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 447bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 448bdfe0cbdSTheodore Ts'o 449bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 450bdfe0cbdSTheodore Ts'o } 451bdfe0cbdSTheodore Ts'o 45218aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45318aadd47SBobi Jam { 45418aadd47SBobi Jam struct super_block *sb = journal->j_private; 45518aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45618aadd47SBobi Jam int error = is_journal_aborted(journal); 4575d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 45818aadd47SBobi Jam 4595d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 460a0154344SDaeho Jeong 461a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 462a0154344SDaeho Jeong 46318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4645d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4655d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4665d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 46718aadd47SBobi Jam list_del_init(&jce->jce_list); 46818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46918aadd47SBobi Jam jce->jce_func(sb, jce, error); 47018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47118aadd47SBobi Jam } 47218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47318aadd47SBobi Jam } 4741c13d5c0STheodore Ts'o 475afb585a9SMauricio Faria de Oliveira /* 476afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 477afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 478afb585a9SMauricio Faria de Oliveira * 479afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 480afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 481afb585a9SMauricio Faria de Oliveira * to write protect the pages. 482afb585a9SMauricio Faria de Oliveira * 483afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 484afb585a9SMauricio Faria de Oliveira */ 485d585bdbeSMatthew Wilcox (Oracle) static int ext4_journalled_writepage_callback(struct folio *folio, 486afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 487afb585a9SMauricio Faria de Oliveira void *data) 488afb585a9SMauricio Faria de Oliveira { 489afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 490afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 491afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 492afb585a9SMauricio Faria de Oliveira 493d585bdbeSMatthew Wilcox (Oracle) bh = head = folio_buffers(folio); 494afb585a9SMauricio Faria de Oliveira do { 495afb585a9SMauricio Faria de Oliveira /* 496afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 497afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 498afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 499afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 500afb585a9SMauricio Faria de Oliveira * properly. 501afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 502afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 503afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 504afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 506afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 507afb585a9SMauricio Faria de Oliveira */ 508afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 509afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 510afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 511afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 512d585bdbeSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 513afb585a9SMauricio Faria de Oliveira goto out; 514afb585a9SMauricio Faria de Oliveira } 515afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 516afb585a9SMauricio Faria de Oliveira 517afb585a9SMauricio Faria de Oliveira out: 518afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 519afb585a9SMauricio Faria de Oliveira } 520afb585a9SMauricio Faria de Oliveira 521afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 522afb585a9SMauricio Faria de Oliveira { 523afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 524afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 525afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 526afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 527afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 528afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 529afb585a9SMauricio Faria de Oliveira }; 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 532afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 533afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 534afb585a9SMauricio Faria de Oliveira } 535afb585a9SMauricio Faria de Oliveira 536afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 537afb585a9SMauricio Faria de Oliveira { 538afb585a9SMauricio Faria de Oliveira int ret; 539afb585a9SMauricio Faria de Oliveira 540afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 541afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 542afb585a9SMauricio Faria de Oliveira else 54359205c8dSJan Kara ret = ext4_normal_submit_inode_data_buffers(jinode); 544afb585a9SMauricio Faria de Oliveira return ret; 545afb585a9SMauricio Faria de Oliveira } 546afb585a9SMauricio Faria de Oliveira 547afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 548afb585a9SMauricio Faria de Oliveira { 549afb585a9SMauricio Faria de Oliveira int ret = 0; 550afb585a9SMauricio Faria de Oliveira 551afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 552afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 553afb585a9SMauricio Faria de Oliveira 554afb585a9SMauricio Faria de Oliveira return ret; 555afb585a9SMauricio Faria de Oliveira } 556afb585a9SMauricio Faria de Oliveira 5571dc1097fSJan Kara static bool system_going_down(void) 5581dc1097fSJan Kara { 5591dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5601dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5611dc1097fSJan Kara } 5621dc1097fSJan Kara 56302a7780eSJan Kara struct ext4_err_translation { 56402a7780eSJan Kara int code; 56502a7780eSJan Kara int errno; 56602a7780eSJan Kara }; 56702a7780eSJan Kara 56802a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 56902a7780eSJan Kara 57002a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57102a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 58702a7780eSJan Kara }; 58802a7780eSJan Kara 58902a7780eSJan Kara static int ext4_errno_to_code(int errno) 59002a7780eSJan Kara { 59102a7780eSJan Kara int i; 59202a7780eSJan Kara 59302a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 59402a7780eSJan Kara if (err_translation[i].errno == errno) 59502a7780eSJan Kara return err_translation[i].code; 59602a7780eSJan Kara return EXT4_ERR_UNKNOWN; 59702a7780eSJan Kara } 59802a7780eSJan Kara 5992d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60040676623SJan Kara __u32 ino, __u64 block, 60140676623SJan Kara const char *func, unsigned int line) 60240676623SJan Kara { 603c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 60440676623SJan Kara 60502a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 60602a7780eSJan Kara if (error == 0) 60702a7780eSJan Kara error = EFSCORRUPTED; 608c92dc856SJan Kara 609c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 610c92dc856SJan Kara sbi->s_add_error_count++; 611c92dc856SJan Kara sbi->s_last_error_code = error; 612c92dc856SJan Kara sbi->s_last_error_line = line; 613c92dc856SJan Kara sbi->s_last_error_ino = ino; 614c92dc856SJan Kara sbi->s_last_error_block = block; 615c92dc856SJan Kara sbi->s_last_error_func = func; 616c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 617c92dc856SJan Kara if (!sbi->s_first_error_time) { 618c92dc856SJan Kara sbi->s_first_error_code = error; 619c92dc856SJan Kara sbi->s_first_error_line = line; 620c92dc856SJan Kara sbi->s_first_error_ino = ino; 621c92dc856SJan Kara sbi->s_first_error_block = block; 622c92dc856SJan Kara sbi->s_first_error_func = func; 623c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 62440676623SJan Kara } 625c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 62640676623SJan Kara } 62740676623SJan Kara 628ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 629ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 630ac27a0ecSDave Kleikamp * 631ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 632617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 633ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 634ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 635ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 636ac27a0ecSDave Kleikamp * write out the superblock safely. 637ac27a0ecSDave Kleikamp * 638dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 639d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 640ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 641014c9caaSJan Kara * 642014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 643014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 644014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 645014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 646014c9caaSJan Kara * at a critical moment in log management. 647ac27a0ecSDave Kleikamp */ 648e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 649e789ca0cSJan Kara __u32 ino, __u64 block, 650e789ca0cSJan Kara const char *func, unsigned int line) 651ac27a0ecSDave Kleikamp { 652b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6532d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 654b08070ecSJan Kara 655e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 656327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 657327eaf73STheodore Ts'o WARN_ON_ONCE(1); 658327eaf73STheodore Ts'o 6592d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6609b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 661ac27a0ecSDave Kleikamp if (journal) 662dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6632d01ddc8SJan Kara } 6642d01ddc8SJan Kara 6652d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6662d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6672d01ddc8SJan Kara /* 6682d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6692d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6702d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6712d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6722d01ddc8SJan Kara */ 673bb9464e0Syangerkun if (continue_fs && journal) 6742d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6752d01ddc8SJan Kara else 6762d01ddc8SJan Kara ext4_commit_super(sb); 6772d01ddc8SJan Kara } 6782d01ddc8SJan Kara 6791dc1097fSJan Kara /* 6801dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6811dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6821dc1097fSJan Kara * disabled. 6831dc1097fSJan Kara */ 684014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 685617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 686ac27a0ecSDave Kleikamp sb->s_id); 687ac27a0ecSDave Kleikamp } 688ac2f7ca5SYe Bin 689ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 690ac2f7ca5SYe Bin return; 691ac2f7ca5SYe Bin 692014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 693014c9caaSJan Kara /* 694014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 695014c9caaSJan Kara * ->s_flags update 696014c9caaSJan Kara */ 697014c9caaSJan Kara smp_wmb(); 698014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 6994327ba52SDaeho Jeong } 700ac27a0ecSDave Kleikamp 701c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 702c92dc856SJan Kara { 703c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 704c92dc856SJan Kara s_error_work); 7052d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7062d01ddc8SJan Kara handle_t *handle; 707c92dc856SJan Kara 7082d01ddc8SJan Kara /* 7092d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7102d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7112d01ddc8SJan Kara * updates. 7122d01ddc8SJan Kara * 7132d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7142d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7152d01ddc8SJan Kara */ 7162d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 717558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7182d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7192d01ddc8SJan Kara if (IS_ERR(handle)) 7202d01ddc8SJan Kara goto write_directly; 721558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7222d01ddc8SJan Kara jbd2_journal_stop(handle); 7232d01ddc8SJan Kara goto write_directly; 7242d01ddc8SJan Kara } 7252d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 726558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 727558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 728558d6450SYe Bin "superblock detected"); 729558d6450SYe Bin clear_buffer_write_io_error(sbh); 730558d6450SYe Bin set_buffer_uptodate(sbh); 731558d6450SYe Bin } 732558d6450SYe Bin 733558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7342d01ddc8SJan Kara jbd2_journal_stop(handle); 7352d01ddc8SJan Kara goto write_directly; 7362d01ddc8SJan Kara } 7372d01ddc8SJan Kara jbd2_journal_stop(handle); 738d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7392d01ddc8SJan Kara return; 7402d01ddc8SJan Kara } 7412d01ddc8SJan Kara write_directly: 7422d01ddc8SJan Kara /* 7432d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7442d01ddc8SJan Kara * out and hope for the best. 7452d01ddc8SJan Kara */ 7464392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 747d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 748ac27a0ecSDave Kleikamp } 749ac27a0ecSDave Kleikamp 750efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 751efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 752efbed4dcSTheodore Ts'o "EXT4-fs error") 753efbed4dcSTheodore Ts'o 75412062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 755014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 75654d3adbcSTheodore Ts'o const char *fmt, ...) 757ac27a0ecSDave Kleikamp { 7580ff2ea7dSJoe Perches struct va_format vaf; 759ac27a0ecSDave Kleikamp va_list args; 760ac27a0ecSDave Kleikamp 7610db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7620db1ff22STheodore Ts'o return; 7630db1ff22STheodore Ts'o 764ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 765efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 766ac27a0ecSDave Kleikamp va_start(args, fmt); 7670ff2ea7dSJoe Perches vaf.fmt = fmt; 7680ff2ea7dSJoe Perches vaf.va = &args; 769efbed4dcSTheodore Ts'o printk(KERN_CRIT 770efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7710ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 772ac27a0ecSDave Kleikamp va_end(args); 773efbed4dcSTheodore Ts'o } 7749a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7759a089b21SGabriel Krisman Bertazi 776e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 777ac27a0ecSDave Kleikamp } 778ac27a0ecSDave Kleikamp 779e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78054d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 781273df556SFrank Mayhar const char *fmt, ...) 782273df556SFrank Mayhar { 783273df556SFrank Mayhar va_list args; 784f7c21177STheodore Ts'o struct va_format vaf; 785273df556SFrank Mayhar 7860db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7870db1ff22STheodore Ts'o return; 7880db1ff22STheodore Ts'o 789ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 790efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 791273df556SFrank Mayhar va_start(args, fmt); 792f7c21177STheodore Ts'o vaf.fmt = fmt; 793f7c21177STheodore Ts'o vaf.va = &args; 794c398eda0STheodore Ts'o if (block) 795d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 796d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 797d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 798d9ee81daSJoe Perches block, current->comm, &vaf); 799d9ee81daSJoe Perches else 800d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 801d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 802d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 803d9ee81daSJoe Perches current->comm, &vaf); 804273df556SFrank Mayhar va_end(args); 805efbed4dcSTheodore Ts'o } 8069a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8079a089b21SGabriel Krisman Bertazi 808e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 80954d3adbcSTheodore Ts'o function, line); 810273df556SFrank Mayhar } 811273df556SFrank Mayhar 812e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 813f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 814f7c21177STheodore Ts'o const char *fmt, ...) 815273df556SFrank Mayhar { 816273df556SFrank Mayhar va_list args; 817f7c21177STheodore Ts'o struct va_format vaf; 818496ad9aaSAl Viro struct inode *inode = file_inode(file); 819273df556SFrank Mayhar char pathname[80], *path; 820273df556SFrank Mayhar 8210db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8220db1ff22STheodore Ts'o return; 8230db1ff22STheodore Ts'o 824ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 825efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8269bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 827f9a62d09SDan Carpenter if (IS_ERR(path)) 828273df556SFrank Mayhar path = "(unknown)"; 829f7c21177STheodore Ts'o va_start(args, fmt); 830f7c21177STheodore Ts'o vaf.fmt = fmt; 831f7c21177STheodore Ts'o vaf.va = &args; 832d9ee81daSJoe Perches if (block) 833d9ee81daSJoe Perches printk(KERN_CRIT 834d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 835d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 836d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 837d9ee81daSJoe Perches block, current->comm, path, &vaf); 838d9ee81daSJoe Perches else 839d9ee81daSJoe Perches printk(KERN_CRIT 840d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 841d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 842d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 843d9ee81daSJoe Perches current->comm, path, &vaf); 844273df556SFrank Mayhar va_end(args); 845efbed4dcSTheodore Ts'o } 8469a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8479a089b21SGabriel Krisman Bertazi 848e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 84954d3adbcSTheodore Ts'o function, line); 850273df556SFrank Mayhar } 851273df556SFrank Mayhar 852722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 853ac27a0ecSDave Kleikamp char nbuf[16]) 854ac27a0ecSDave Kleikamp { 855ac27a0ecSDave Kleikamp char *errstr = NULL; 856ac27a0ecSDave Kleikamp 857ac27a0ecSDave Kleikamp switch (errno) { 8586a797d27SDarrick J. Wong case -EFSCORRUPTED: 8596a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8606a797d27SDarrick J. Wong break; 8616a797d27SDarrick J. Wong case -EFSBADCRC: 8626a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8636a797d27SDarrick J. Wong break; 864ac27a0ecSDave Kleikamp case -EIO: 865ac27a0ecSDave Kleikamp errstr = "IO failure"; 866ac27a0ecSDave Kleikamp break; 867ac27a0ecSDave Kleikamp case -ENOMEM: 868ac27a0ecSDave Kleikamp errstr = "Out of memory"; 869ac27a0ecSDave Kleikamp break; 870ac27a0ecSDave Kleikamp case -EROFS: 87178f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87278f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 873ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 874ac27a0ecSDave Kleikamp else 875ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 876ac27a0ecSDave Kleikamp break; 877ac27a0ecSDave Kleikamp default: 878ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 879ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 880ac27a0ecSDave Kleikamp * NULL. */ 881ac27a0ecSDave Kleikamp if (nbuf) { 882ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 883ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 884ac27a0ecSDave Kleikamp errstr = nbuf; 885ac27a0ecSDave Kleikamp } 886ac27a0ecSDave Kleikamp break; 887ac27a0ecSDave Kleikamp } 888ac27a0ecSDave Kleikamp 889ac27a0ecSDave Kleikamp return errstr; 890ac27a0ecSDave Kleikamp } 891ac27a0ecSDave Kleikamp 892617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 893ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 894ac27a0ecSDave Kleikamp 895c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 896c398eda0STheodore Ts'o unsigned int line, int errno) 897ac27a0ecSDave Kleikamp { 898ac27a0ecSDave Kleikamp char nbuf[16]; 899ac27a0ecSDave Kleikamp const char *errstr; 900ac27a0ecSDave Kleikamp 9010db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9020db1ff22STheodore Ts'o return; 9030db1ff22STheodore Ts'o 904ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 905ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 906ac27a0ecSDave Kleikamp * an error. */ 907bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 908ac27a0ecSDave Kleikamp return; 909ac27a0ecSDave Kleikamp 910efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 911617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 912c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 913c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 914efbed4dcSTheodore Ts'o } 9159a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 916ac27a0ecSDave Kleikamp 917e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 918ac27a0ecSDave Kleikamp } 919ac27a0ecSDave Kleikamp 920e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 921e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 922b31e1552SEric Sandeen { 9230ff2ea7dSJoe Perches struct va_format vaf; 924b31e1552SEric Sandeen va_list args; 925b31e1552SEric Sandeen 926da812f61SLukas Czerner if (sb) { 9271cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 928da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 929da812f61SLukas Czerner "EXT4-fs")) 930efbed4dcSTheodore Ts'o return; 931da812f61SLukas Czerner } 932efbed4dcSTheodore Ts'o 933b31e1552SEric Sandeen va_start(args, fmt); 9340ff2ea7dSJoe Perches vaf.fmt = fmt; 9350ff2ea7dSJoe Perches vaf.va = &args; 936da812f61SLukas Czerner if (sb) 9370ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 938da812f61SLukas Czerner else 939da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 940b31e1552SEric Sandeen va_end(args); 941b31e1552SEric Sandeen } 942b31e1552SEric Sandeen 9431cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9441cf006edSDmitry Monakhov { 9451cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9461cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9471cf006edSDmitry Monakhov "EXT4-fs warning"); 9481cf006edSDmitry Monakhov } 949b03a2f7eSAndreas Dilger 95012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 951c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 952ac27a0ecSDave Kleikamp { 9530ff2ea7dSJoe Perches struct va_format vaf; 954ac27a0ecSDave Kleikamp va_list args; 955ac27a0ecSDave Kleikamp 956b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 957efbed4dcSTheodore Ts'o return; 958efbed4dcSTheodore Ts'o 959ac27a0ecSDave Kleikamp va_start(args, fmt); 9600ff2ea7dSJoe Perches vaf.fmt = fmt; 9610ff2ea7dSJoe Perches vaf.va = &args; 9620ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9630ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 964ac27a0ecSDave Kleikamp va_end(args); 965ac27a0ecSDave Kleikamp } 966ac27a0ecSDave Kleikamp 967b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 968b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 969b03a2f7eSAndreas Dilger { 970b03a2f7eSAndreas Dilger struct va_format vaf; 971b03a2f7eSAndreas Dilger va_list args; 972b03a2f7eSAndreas Dilger 973b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 974b03a2f7eSAndreas Dilger return; 975b03a2f7eSAndreas Dilger 976b03a2f7eSAndreas Dilger va_start(args, fmt); 977b03a2f7eSAndreas Dilger vaf.fmt = fmt; 978b03a2f7eSAndreas Dilger vaf.va = &args; 979b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 980b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 981b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 982b03a2f7eSAndreas Dilger va_end(args); 983b03a2f7eSAndreas Dilger } 984b03a2f7eSAndreas Dilger 985e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 986e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 987e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 988e29136f8STheodore Ts'o const char *fmt, ...) 9895d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9905d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9915d1b1b3fSAneesh Kumar K.V { 9920ff2ea7dSJoe Perches struct va_format vaf; 9935d1b1b3fSAneesh Kumar K.V va_list args; 9945d1b1b3fSAneesh Kumar K.V 9950db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9960db1ff22STheodore Ts'o return; 9970db1ff22STheodore Ts'o 998ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 999efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10005d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10010ff2ea7dSJoe Perches vaf.fmt = fmt; 10020ff2ea7dSJoe Perches vaf.va = &args; 100321149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1004e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1005e29136f8STheodore Ts'o if (ino) 10060ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1007e29136f8STheodore Ts'o if (block) 1008efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1009efbed4dcSTheodore Ts'o (unsigned long long) block); 10100ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10115d1b1b3fSAneesh Kumar K.V va_end(args); 1012efbed4dcSTheodore Ts'o } 10135d1b1b3fSAneesh Kumar K.V 1014c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1015327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1016327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1017e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10182d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10192d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10202d01ddc8SJan Kara line); 1021c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10222d01ddc8SJan Kara } 10235d1b1b3fSAneesh Kumar K.V return; 10245d1b1b3fSAneesh Kumar K.V } 10255d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1026e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10275d1b1b3fSAneesh Kumar K.V /* 10285d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10295d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10305d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10315d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10325d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 103325985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10345d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10355d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10365d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10375d1b1b3fSAneesh Kumar K.V */ 10385d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10395d1b1b3fSAneesh Kumar K.V return; 10405d1b1b3fSAneesh Kumar K.V } 10415d1b1b3fSAneesh Kumar K.V 1042db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1043db79e6d1SWang Shilong ext4_group_t group, 1044db79e6d1SWang Shilong unsigned int flags) 1045db79e6d1SWang Shilong { 1046db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1047db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1048db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10499af0b3d1SWang Shilong int ret; 1050db79e6d1SWang Shilong 1051*5354b2afSTheodore Ts'o if (!grp || !gdp) 1052*5354b2afSTheodore Ts'o return; 10539af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10549af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10559af0b3d1SWang Shilong &grp->bb_state); 10569af0b3d1SWang Shilong if (!ret) 1057db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1058db79e6d1SWang Shilong grp->bb_free); 1059db79e6d1SWang Shilong } 1060db79e6d1SWang Shilong 10619af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10629af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10639af0b3d1SWang Shilong &grp->bb_state); 10649af0b3d1SWang Shilong if (!ret && gdp) { 1065db79e6d1SWang Shilong int count; 1066db79e6d1SWang Shilong 1067db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1068db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1069db79e6d1SWang Shilong count); 1070db79e6d1SWang Shilong } 1071db79e6d1SWang Shilong } 1072db79e6d1SWang Shilong } 1073db79e6d1SWang Shilong 1074617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1075ac27a0ecSDave Kleikamp { 1076617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1077ac27a0ecSDave Kleikamp 1078617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1079ac27a0ecSDave Kleikamp return; 1080ac27a0ecSDave Kleikamp 108112062dddSEric Sandeen ext4_warning(sb, 1082ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1083ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1084617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1085ac27a0ecSDave Kleikamp 1086617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1087617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1088617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1089ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1090ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1091ac27a0ecSDave Kleikamp 1092ac27a0ecSDave Kleikamp /* 1093ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1094ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1095ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1096ac27a0ecSDave Kleikamp */ 1097ac27a0ecSDave Kleikamp } 1098ac27a0ecSDave Kleikamp 1099ac27a0ecSDave Kleikamp /* 1100ac27a0ecSDave Kleikamp * Open the external journal device 1101ac27a0ecSDave Kleikamp */ 1102b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1103ac27a0ecSDave Kleikamp { 1104ac27a0ecSDave Kleikamp struct block_device *bdev; 1105ac27a0ecSDave Kleikamp 1106d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1107ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1108ac27a0ecSDave Kleikamp goto fail; 1109ac27a0ecSDave Kleikamp return bdev; 1110ac27a0ecSDave Kleikamp 1111ac27a0ecSDave Kleikamp fail: 1112ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1113ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1114ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1115ac27a0ecSDave Kleikamp return NULL; 1116ac27a0ecSDave Kleikamp } 1117ac27a0ecSDave Kleikamp 1118ac27a0ecSDave Kleikamp /* 1119ac27a0ecSDave Kleikamp * Release the journal device 1120ac27a0ecSDave Kleikamp */ 11214385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1122ac27a0ecSDave Kleikamp { 11234385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1124ac27a0ecSDave Kleikamp } 1125ac27a0ecSDave Kleikamp 11264385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1127ac27a0ecSDave Kleikamp { 1128ac27a0ecSDave Kleikamp struct block_device *bdev; 1129ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1130ac27a0ecSDave Kleikamp if (bdev) { 11314385bab1SAl Viro ext4_blkdev_put(bdev); 1132ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp } 1135ac27a0ecSDave Kleikamp 1136ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1137ac27a0ecSDave Kleikamp { 1138617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1139ac27a0ecSDave Kleikamp } 1140ac27a0ecSDave Kleikamp 1141617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1142ac27a0ecSDave Kleikamp { 1143ac27a0ecSDave Kleikamp struct list_head *l; 1144ac27a0ecSDave Kleikamp 1145b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1146ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1147ac27a0ecSDave Kleikamp 1148ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1149ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1150ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1151ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1152ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1153ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1154ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1155ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp } 1158ac27a0ecSDave Kleikamp 1159957153fcSJan Kara #ifdef CONFIG_QUOTA 1160957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1161957153fcSJan Kara 1162957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1163957153fcSJan Kara { 1164957153fcSJan Kara int type; 1165957153fcSJan Kara 1166957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1167957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1168957153fcSJan Kara ext4_quota_off(sb, type); 1169957153fcSJan Kara } 117033458eabSTheodore Ts'o 117133458eabSTheodore Ts'o /* 117233458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117333458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117433458eabSTheodore Ts'o */ 117533458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 117633458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117733458eabSTheodore Ts'o int type) 117833458eabSTheodore Ts'o { 117933458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 118033458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118133458eabSTheodore Ts'o } 1182957153fcSJan Kara #else 1183957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1184957153fcSJan Kara { 1185957153fcSJan Kara } 1186957153fcSJan Kara #endif 1187957153fcSJan Kara 11881f79467cSJason Yan static int ext4_percpu_param_init(struct ext4_sb_info *sbi) 11891f79467cSJason Yan { 11901f79467cSJason Yan ext4_fsblk_t block; 11911f79467cSJason Yan int err; 11921f79467cSJason Yan 11931f79467cSJason Yan block = ext4_count_free_clusters(sbi->s_sb); 11941f79467cSJason Yan ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); 11951f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 11961f79467cSJason Yan GFP_KERNEL); 11971f79467cSJason Yan if (!err) { 11981f79467cSJason Yan unsigned long freei = ext4_count_free_inodes(sbi->s_sb); 11991f79467cSJason Yan sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 12001f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 12011f79467cSJason Yan GFP_KERNEL); 12021f79467cSJason Yan } 12031f79467cSJason Yan if (!err) 12041f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirs_counter, 12051f79467cSJason Yan ext4_count_dirs(sbi->s_sb), GFP_KERNEL); 12061f79467cSJason Yan if (!err) 12071f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 12081f79467cSJason Yan GFP_KERNEL); 12091f79467cSJason Yan if (!err) 12101f79467cSJason Yan err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 12111f79467cSJason Yan GFP_KERNEL); 12121f79467cSJason Yan if (!err) 12131f79467cSJason Yan err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 12141f79467cSJason Yan 12151f79467cSJason Yan if (err) 12161f79467cSJason Yan ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory"); 12171f79467cSJason Yan 12181f79467cSJason Yan return err; 12191f79467cSJason Yan } 12201f79467cSJason Yan 12211f79467cSJason Yan static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi) 12221f79467cSJason Yan { 12231f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeclusters_counter); 12241f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeinodes_counter); 12251f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirs_counter); 12261f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 12271f79467cSJason Yan percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 12281f79467cSJason Yan percpu_free_rwsem(&sbi->s_writepages_rwsem); 12291f79467cSJason Yan } 12301f79467cSJason Yan 12316ef68498SJason Yan static void ext4_group_desc_free(struct ext4_sb_info *sbi) 12326ef68498SJason Yan { 12336ef68498SJason Yan struct buffer_head **group_desc; 12346ef68498SJason Yan int i; 12356ef68498SJason Yan 12366ef68498SJason Yan rcu_read_lock(); 12376ef68498SJason Yan group_desc = rcu_dereference(sbi->s_group_desc); 12386ef68498SJason Yan for (i = 0; i < sbi->s_gdb_count; i++) 12396ef68498SJason Yan brelse(group_desc[i]); 12406ef68498SJason Yan kvfree(group_desc); 12416ef68498SJason Yan rcu_read_unlock(); 12426ef68498SJason Yan } 12436ef68498SJason Yan 1244dcbf8758SJason Yan static void ext4_flex_groups_free(struct ext4_sb_info *sbi) 1245dcbf8758SJason Yan { 1246dcbf8758SJason Yan struct flex_groups **flex_groups; 1247dcbf8758SJason Yan int i; 1248dcbf8758SJason Yan 1249dcbf8758SJason Yan rcu_read_lock(); 1250dcbf8758SJason Yan flex_groups = rcu_dereference(sbi->s_flex_groups); 1251dcbf8758SJason Yan if (flex_groups) { 1252dcbf8758SJason Yan for (i = 0; i < sbi->s_flex_groups_allocated; i++) 1253dcbf8758SJason Yan kvfree(flex_groups[i]); 1254dcbf8758SJason Yan kvfree(flex_groups); 1255dcbf8758SJason Yan } 1256dcbf8758SJason Yan rcu_read_unlock(); 1257dcbf8758SJason Yan } 1258dcbf8758SJason Yan 1259617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1260ac27a0ecSDave Kleikamp { 1261617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1262617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 126397abd7d4STheodore Ts'o int aborted = 0; 1264856dd6c5SNathan Chancellor int err; 1265ac27a0ecSDave Kleikamp 1266b98535d0SYe Bin /* 1267b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1268b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1269b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1270b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1271b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1272b98535d0SYe Bin * read metadata verify failed then will queue error work. 1273b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1274b98535d0SYe Bin * BUG_ON. 1275b98535d0SYe Bin */ 1276b98535d0SYe Bin ext4_unregister_sysfs(sb); 1277b98535d0SYe Bin 12784808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 1279bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", 1280bb0fbc78SLukas Czerner &sb->s_uuid); 12814808cb5bSZhang Yi 1282857ac889SLukas Czerner ext4_unregister_li_request(sb); 1283957153fcSJan Kara ext4_quota_off_umount(sb); 1284e0ccfd95SChristoph Hellwig 1285c92dc856SJan Kara flush_work(&sbi->s_error_work); 12862e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 128702f310fcSJan Kara ext4_release_orphan_info(sb); 12884c0425ffSMingming Cao 12890390131bSFrank Mayhar if (sbi->s_journal) { 129097abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1291ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 129247b4a50bSJan Kara sbi->s_journal = NULL; 1293878520acSTheodore Ts'o if ((err < 0) && !aborted) { 129454d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12950390131bSFrank Mayhar } 1296878520acSTheodore Ts'o } 1297d4edac31SJosef Bacik 1298d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 1299292a089dSSteven Rostedt (Google) timer_shutdown_sync(&sbi->s_err_report); 1300d4edac31SJosef Bacik ext4_release_system_zone(sb); 1301d4edac31SJosef Bacik ext4_mb_release(sb); 1302d4edac31SJosef Bacik ext4_ext_release(sb); 1303d4edac31SJosef Bacik 1304bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1305e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 130602f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1307ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1308ac27a0ecSDave Kleikamp } 1309bc98a42cSDavid Howells if (!sb_rdonly(sb)) 13104392fbc4SJan Kara ext4_commit_super(sb); 1311a8e25a83SArtem Bityutskiy 13126ef68498SJason Yan ext4_group_desc_free(sbi); 1313dcbf8758SJason Yan ext4_flex_groups_free(sbi); 13141f79467cSJason Yan ext4_percpu_param_destroy(sbi); 1315ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1316856dd6c5SNathan Chancellor for (int i = 0; i < EXT4_MAXQUOTAS; i++) 131733458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1318ac27a0ecSDave Kleikamp #endif 1319ac27a0ecSDave Kleikamp 1320ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1321ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1322ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1323ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1324ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1325ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1326837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1327ac27a0ecSDave Kleikamp 132889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1329f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1330ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1331ac27a0ecSDave Kleikamp /* 1332ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1333ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1334ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1335ac27a0ecSDave Kleikamp */ 1336ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1337ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1338617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1339ac27a0ecSDave Kleikamp } 134050c15df6SChengguang Xu 1341dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1342dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 134350c15df6SChengguang Xu 134447387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 134547387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 134650c15df6SChengguang Xu 1347618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1348618f0031SPavel Skripkin 13499060dd2cSEric Sandeen brelse(sbi->s_sbh); 1350ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13513197ebdbSTheodore Ts'o /* 13523197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13533197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13543197ebdbSTheodore Ts'o */ 13553197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13563197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13570441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13580441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1359705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13608012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1361ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13625298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1363f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1364c83ad55eSGabriel Krisman Bertazi #endif 1365ac27a0ecSDave Kleikamp kfree(sbi); 1366ac27a0ecSDave Kleikamp } 1367ac27a0ecSDave Kleikamp 1368e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1369ac27a0ecSDave Kleikamp 1370ac27a0ecSDave Kleikamp /* 1371ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1372ac27a0ecSDave Kleikamp */ 1373617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1374ac27a0ecSDave Kleikamp { 1375617ba13bSMingming Cao struct ext4_inode_info *ei; 1376ac27a0ecSDave Kleikamp 1377fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1378ac27a0ecSDave Kleikamp if (!ei) 1379ac27a0ecSDave Kleikamp return NULL; 13800b8e58a1SAndreas Dilger 1381ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 13827ea71af9SYe Bin ei->i_flags = 0; 1383202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 138438727786SOjaswin Mujoo ei->i_prealloc_node = RB_ROOT; 138527bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 138638727786SOjaswin Mujoo rwlock_init(&ei->i_prealloc_lock); 13879a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13889a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1389edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1390eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1391edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1392dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1393d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1394d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13951dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1396a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1397a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 139896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1399a9e7f447SDmitry Monakhov #endif 14008aefcd55STheodore Ts'o ei->jinode = NULL; 14012e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1402744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1403b436b9beSJan Kara ei->i_sync_tid = 0; 1404b436b9beSJan Kara ei->i_datasync_tid = 0; 1405e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 14062e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1407aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1408aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1409ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1410ac27a0ecSDave Kleikamp } 1411ac27a0ecSDave Kleikamp 14127ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 14137ff9c073STheodore Ts'o { 14147ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 14157ff9c073STheodore Ts'o 141629b3692eSEric Biggers if (!drop) 141729b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 141829b3692eSEric Biggers 14197ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 14207ff9c073STheodore Ts'o return drop; 14217ff9c073STheodore Ts'o } 14227ff9c073STheodore Ts'o 142394053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1424fa0d7e3dSNick Piggin { 14252c58d548SEric Biggers fscrypt_free_inode(inode); 1426aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1427aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1428aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1429aa75f4d3SHarshad Shirwadkar } 1430fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1431fa0d7e3dSNick Piggin } 1432fa0d7e3dSNick Piggin 1433617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1434ac27a0ecSDave Kleikamp { 14359f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1436b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1437b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1438b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 14399f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 14409f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 14419f7dd93dSVasily Averin true); 14429f7dd93dSVasily Averin dump_stack(); 14439f7dd93dSVasily Averin } 14446fed8395SJeffle Xu 14456fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 14466fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 14476fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 14486fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 14496fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1450ac27a0ecSDave Kleikamp } 1451ac27a0ecSDave Kleikamp 145251cc5068SAlexey Dobriyan static void init_once(void *foo) 1453ac27a0ecSDave Kleikamp { 1454c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1455ac27a0ecSDave Kleikamp 1456ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1457ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14580e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1459ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1460aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1461ac27a0ecSDave Kleikamp } 1462ac27a0ecSDave Kleikamp 1463e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1464ac27a0ecSDave Kleikamp { 1465f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1466f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1467f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1468f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1469f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1470f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 147120c2df83SPaul Mundt init_once); 1472617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1473ac27a0ecSDave Kleikamp return -ENOMEM; 1474ac27a0ecSDave Kleikamp return 0; 1475ac27a0ecSDave Kleikamp } 1476ac27a0ecSDave Kleikamp 1477ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1478ac27a0ecSDave Kleikamp { 14798c0a8537SKirill A. Shutemov /* 14808c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14818c0a8537SKirill A. Shutemov * destroy cache. 14828c0a8537SKirill A. Shutemov */ 14838c0a8537SKirill A. Shutemov rcu_barrier(); 1484617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1485ac27a0ecSDave Kleikamp } 1486ac27a0ecSDave Kleikamp 14870930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1488ac27a0ecSDave Kleikamp { 1489aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14900930fcc1SAl Viro invalidate_inode_buffers(inode); 1491dbd5768fSJan Kara clear_inode(inode); 149227bc446eSbrookxu ext4_discard_preallocations(inode, 0); 149351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1494f4c2d372SJan Kara dquot_drop(inode); 14958aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14968aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14978aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14988aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14998aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 15008aefcd55STheodore Ts'o } 15013d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1502c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1503ac27a0ecSDave Kleikamp } 1504ac27a0ecSDave Kleikamp 15051b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 15061b961ac0SChristoph Hellwig u64 ino, u32 generation) 1507ac27a0ecSDave Kleikamp { 1508ac27a0ecSDave Kleikamp struct inode *inode; 1509ac27a0ecSDave Kleikamp 15108a363970STheodore Ts'o /* 1511ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1512ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1513ac27a0ecSDave Kleikamp */ 15148a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 15151d1fe1eeSDavid Howells if (IS_ERR(inode)) 15161d1fe1eeSDavid Howells return ERR_CAST(inode); 15171d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1518ac27a0ecSDave Kleikamp iput(inode); 1519ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1520ac27a0ecSDave Kleikamp } 15211b961ac0SChristoph Hellwig 15221b961ac0SChristoph Hellwig return inode; 1523ac27a0ecSDave Kleikamp } 15241b961ac0SChristoph Hellwig 15251b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 15261b961ac0SChristoph Hellwig int fh_len, int fh_type) 15271b961ac0SChristoph Hellwig { 15281b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 15291b961ac0SChristoph Hellwig ext4_nfs_get_inode); 15301b961ac0SChristoph Hellwig } 15311b961ac0SChristoph Hellwig 15321b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 15331b961ac0SChristoph Hellwig int fh_len, int fh_type) 15341b961ac0SChristoph Hellwig { 15351b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 15361b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1537ac27a0ecSDave Kleikamp } 1538ac27a0ecSDave Kleikamp 1539fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1540fde87268STheodore Ts'o { 1541fde87268STheodore Ts'o struct writeback_control wbc = { 1542fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1543fde87268STheodore Ts'o }; 1544fde87268STheodore Ts'o 1545fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1546fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1547fde87268STheodore Ts'o } 1548fde87268STheodore Ts'o 1549ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1550d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1551689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1552ac27a0ecSDave Kleikamp 1553617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1554617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1555617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1556617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1557617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15586f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15598c54ca9cSAl Viro const struct path *path); 1560617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1561ac27a0ecSDave Kleikamp size_t len, loff_t off); 1562617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1563ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15647c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15657c319d32SAditya Kali unsigned int flags); 1566ac27a0ecSDave Kleikamp 156796c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 156896c7e0d9SJan Kara { 156996c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 157096c7e0d9SJan Kara } 157196c7e0d9SJan Kara 157261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 157360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1574617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1575617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1576617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1577617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1578a5b5ee32SJan Kara .write_info = ext4_write_info, 1579a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1580a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1581040cb378SLi Xi .get_projid = ext4_get_projid, 15827a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1583ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1584ac27a0ecSDave Kleikamp }; 1585ac27a0ecSDave Kleikamp 15860d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1587617ba13bSMingming Cao .quota_on = ext4_quota_on, 1588ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1589287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 15900a240339SJan Kara .get_state = dquot_get_state, 1591287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1592287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 15936332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 15946332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1595ac27a0ecSDave Kleikamp }; 1596ac27a0ecSDave Kleikamp #endif 1597ac27a0ecSDave Kleikamp 1598ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1599617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 160094053139SAl Viro .free_inode = ext4_free_in_core_inode, 1601617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1602617ba13bSMingming Cao .write_inode = ext4_write_inode, 1603617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16047ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16050930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1606617ba13bSMingming Cao .put_super = ext4_put_super, 1607617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1608c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1609c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1610617ba13bSMingming Cao .statfs = ext4_statfs, 1611617ba13bSMingming Cao .show_options = ext4_show_options, 1612ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1613617ba13bSMingming Cao .quota_read = ext4_quota_read, 1614617ba13bSMingming Cao .quota_write = ext4_quota_write, 161596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1616ac27a0ecSDave Kleikamp #endif 1617ac27a0ecSDave Kleikamp }; 1618ac27a0ecSDave Kleikamp 161939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16201b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16211b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1622617ba13bSMingming Cao .get_parent = ext4_get_parent, 1623fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1624ac27a0ecSDave Kleikamp }; 1625ac27a0ecSDave Kleikamp 1626ac27a0ecSDave Kleikamp enum { 1627ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1628ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 162972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 16302d544ec9SYang Xu Opt_user_xattr, Opt_acl, 163172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1632ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1633ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1634ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16356ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16364f74d15fSEric Biggers Opt_inlinecrypt, 1637ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1638ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16391ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 16409cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1641327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 16424437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 16431449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16445328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1645744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1646fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1647cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 164821175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1649e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16508016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 165199c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16528016e29fSHarshad Shirwadkar #endif 1653ac27a0ecSDave Kleikamp }; 1654ac27a0ecSDave Kleikamp 1655e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1656ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1657ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1658ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1659e5a185c2SLukas Czerner {} 1660e5a185c2SLukas Czerner }; 1661e5a185c2SLukas Czerner 1662e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1663ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1664ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1665ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1666e5a185c2SLukas Czerner {} 1667e5a185c2SLukas Czerner }; 1668e5a185c2SLukas Czerner 1669e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1670e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1671e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1672e5a185c2SLukas Czerner {} 1673e5a185c2SLukas Czerner }; 1674e5a185c2SLukas Czerner 1675e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1676ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1677ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1678ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1679e5a185c2SLukas Czerner {} 1680e5a185c2SLukas Czerner }; 1681e5a185c2SLukas Czerner 1682e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1683e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1684e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1685e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1686e5a185c2SLukas Czerner {} 1687e5a185c2SLukas Czerner }; 1688e5a185c2SLukas Czerner 1689e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1690e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1691e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1692e5a185c2SLukas Czerner 1693e5a185c2SLukas Czerner /* 1694e5a185c2SLukas Czerner * Mount option specification 1695e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1696e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1697e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1698e5a185c2SLukas Czerner * separate for now. 1699e5a185c2SLukas Czerner */ 1700e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1701e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1702e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1703e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1704e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1705e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1706e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1707e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1708e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1709e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1710e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1711e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1712e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1713e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1714e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1715e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1716e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1717e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1718e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1719e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1720e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1721e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1722e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1723e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1724e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1725e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1726e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1727e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1728e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1729e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1730e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1731e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1732e5a185c2SLukas Czerner ext4_param_data_err), 1733e5a185c2SLukas Czerner fsparam_string_empty 1734e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1735e5a185c2SLukas Czerner fsparam_string_empty 1736e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1737e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1738e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1739e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1740e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1741e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1742e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1743e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1744e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1745e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 17461ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1747e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1748e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1749e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1750e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1751e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1752e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1753e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1754e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1755e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1756e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1757e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1758e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1759e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1760e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1761e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1762e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1763e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1764e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1765e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1766e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1767e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1768e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1769e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1770e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1771e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1772e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1773e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1774e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1775e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1776e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1777e5a185c2SLukas Czerner #endif 1778e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1779e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1780e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1781e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1782e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1783e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1784e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1785e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1786e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1787e5a185c2SLukas Czerner Opt_removed), 1788e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1789e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1790e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1791e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1792e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1793e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1794e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1795e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1796e5a185c2SLukas Czerner {} 1797e5a185c2SLukas Czerner }; 1798e5a185c2SLukas Czerner 1799b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1800196e402aSHarshad Shirwadkar 180126092bf5STheodore Ts'o #define MOPT_SET 0x0001 180226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 180326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 180426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 180526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 180626092bf5STheodore Ts'o #define MOPT_Q 0 1807ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 180826092bf5STheodore Ts'o #else 180926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 181026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 181126092bf5STheodore Ts'o #endif 1812ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1813ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18148dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1815ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1816ba2e524dSLukas Czerner #define MOPT_2 0x0100 181726092bf5STheodore Ts'o 181826092bf5STheodore Ts'o static const struct mount_opts { 181926092bf5STheodore Ts'o int token; 182026092bf5STheodore Ts'o int mount_opt; 182126092bf5STheodore Ts'o int flags; 182226092bf5STheodore Ts'o } ext4_mount_opts[] = { 182326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 182426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 182526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 182626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 182726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 182826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 18298dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 18308dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 18318dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 18328dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 183326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 183426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 18358dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 18368dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18378dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 183859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1839327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1840327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1841cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1842c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1843c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 18448dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 18451e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 184626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18478dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18481e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18498dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1850ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 185126092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 185226092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 185326092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 185426092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 185526092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1856ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1857ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1858ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1859ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1860ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 186126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 186226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 186326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 186426092bf5STheodore Ts'o #else 186526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 186626092bf5STheodore Ts'o #endif 186726092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 186826092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 186926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 187026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 187126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 187226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 187326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 187449da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 187549da9392SJan Kara MOPT_SET | MOPT_Q}, 187626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 187749da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 187849da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1879ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1880ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1881ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1882cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 188321175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 18843d392b26STheodore Ts'o MOPT_SET}, 188599c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 18860f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 18870f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 18888016e29fSHarshad Shirwadkar #endif 188926092bf5STheodore Ts'o {Opt_err, 0, 0} 189026092bf5STheodore Ts'o }; 189126092bf5STheodore Ts'o 18925298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1893c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1894c83ad55eSGabriel Krisman Bertazi __u16 magic; 1895c83ad55eSGabriel Krisman Bertazi char *name; 189649bd03ccSChristoph Hellwig unsigned int version; 1897c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 189849bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1899c83ad55eSGabriel Krisman Bertazi }; 1900c83ad55eSGabriel Krisman Bertazi 1901aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1902aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1903c83ad55eSGabriel Krisman Bertazi { 1904c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1905c83ad55eSGabriel Krisman Bertazi int i; 1906c83ad55eSGabriel Krisman Bertazi 1907c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1908c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1909aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1910c83ad55eSGabriel Krisman Bertazi 1911aa8bf298SChristoph Hellwig return NULL; 1912c83ad55eSGabriel Krisman Bertazi } 1913c83ad55eSGabriel Krisman Bertazi #endif 1914c83ad55eSGabriel Krisman Bertazi 19156e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 19166e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 19176e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 19186e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 19196e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 19206e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 19216e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 19226e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 19236e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 19246e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 19256e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 19266e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 19276e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 19286e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 19296e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 19306e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 19316e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 19327edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 193327b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 19346e47a3ccSLukas Czerner 1935461c3af0SLukas Czerner struct ext4_fs_context { 1936e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 193785456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1938e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 19396e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 19406e47a3ccSLukas Czerner int s_fc_debug_max_replay; 19416e47a3ccSLukas Czerner #endif 19426e47a3ccSLukas Czerner unsigned short qname_spec; 19436e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 19446e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 19456e47a3ccSLukas Czerner unsigned long journal_devnum; 19466e47a3ccSLukas Czerner unsigned long s_commit_interval; 19476e47a3ccSLukas Czerner unsigned long s_stripe; 19486e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19496e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19506e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19516e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19526e47a3ccSLukas Czerner unsigned int journal_ioprio; 19536e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19546e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19556e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19566e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1957e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 1958e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 1959b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19606e47a3ccSLukas Czerner unsigned int spec; 19616e47a3ccSLukas Czerner u32 s_max_batch_time; 19626e47a3ccSLukas Czerner u32 s_min_batch_time; 19636e47a3ccSLukas Czerner kuid_t s_resuid; 19646e47a3ccSLukas Czerner kgid_t s_resgid; 19657edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1966b237e304SHarshad Shirwadkar }; 1967b237e304SHarshad Shirwadkar 1968cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1969cebe85d5SLukas Czerner { 1970cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1971cebe85d5SLukas Czerner int i; 1972cebe85d5SLukas Czerner 1973cebe85d5SLukas Czerner if (!ctx) 1974cebe85d5SLukas Czerner return; 1975cebe85d5SLukas Czerner 1976cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1977cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1978cebe85d5SLukas Czerner 197985456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1980cebe85d5SLukas Czerner kfree(ctx); 1981cebe85d5SLukas Czerner } 1982cebe85d5SLukas Czerner 1983cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 1984cebe85d5SLukas Czerner { 1985da9e4802SDan Carpenter struct ext4_fs_context *ctx; 1986cebe85d5SLukas Czerner 1987cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 1988cebe85d5SLukas Czerner if (!ctx) 1989cebe85d5SLukas Czerner return -ENOMEM; 1990cebe85d5SLukas Czerner 1991cebe85d5SLukas Czerner fc->fs_private = ctx; 1992cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 1993cebe85d5SLukas Czerner 1994cebe85d5SLukas Czerner return 0; 1995cebe85d5SLukas Czerner } 1996cebe85d5SLukas Czerner 1997e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 1998e6e268cbSLukas Czerner /* 1999e6e268cbSLukas Czerner * Note the name of the specified quota file. 2000e6e268cbSLukas Czerner */ 2001e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2002e6e268cbSLukas Czerner struct fs_parameter *param) 2003e6e268cbSLukas Czerner { 2004e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2005e6e268cbSLukas Czerner char *qname; 2006e6e268cbSLukas Czerner 2007e6e268cbSLukas Czerner if (param->size < 1) { 2008e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2009e6e268cbSLukas Czerner return -EINVAL; 2010e6e268cbSLukas Czerner } 2011e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2012e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2013e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2014e6e268cbSLukas Czerner return -EINVAL; 2015e6e268cbSLukas Czerner } 2016e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2017e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2018e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2019e6e268cbSLukas Czerner "%s quota file already specified", 2020e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2021e6e268cbSLukas Czerner return -EINVAL; 2022e6e268cbSLukas Czerner } 2023e6e268cbSLukas Czerner return 0; 2024e6e268cbSLukas Czerner } 2025e6e268cbSLukas Czerner 2026e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2027e6e268cbSLukas Czerner if (!qname) { 2028e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2029e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2030e6e268cbSLukas Czerner return -ENOMEM; 2031e6e268cbSLukas Czerner } 2032e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2033e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2035e6e268cbSLukas Czerner return 0; 2036e6e268cbSLukas Czerner } 2037e6e268cbSLukas Czerner 2038e6e268cbSLukas Czerner /* 2039e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2040e6e268cbSLukas Czerner */ 2041e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2042e6e268cbSLukas Czerner { 2043e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2044e6e268cbSLukas Czerner 2045e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2046e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2047e6e268cbSLukas Czerner 2048e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2049e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20506e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2051e6e268cbSLukas Czerner return 0; 2052e6e268cbSLukas Czerner } 2053e6e268cbSLukas Czerner #endif 2054e6e268cbSLukas Czerner 205585456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 205685456054SEric Biggers struct ext4_fs_context *ctx) 205785456054SEric Biggers { 205885456054SEric Biggers int err; 205985456054SEric Biggers 206085456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 206185456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 206285456054SEric Biggers "test_dummy_encryption option not supported"); 206385456054SEric Biggers return -EINVAL; 206485456054SEric Biggers } 206585456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 206685456054SEric Biggers &ctx->dummy_enc_policy); 206785456054SEric Biggers if (err == -EINVAL) { 206885456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 206985456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 207085456054SEric Biggers } else if (err == -EEXIST) { 207185456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 207285456054SEric Biggers "Conflicting test_dummy_encryption options"); 207385456054SEric Biggers return -EINVAL; 207485456054SEric Biggers } 207585456054SEric Biggers return err; 207685456054SEric Biggers } 207785456054SEric Biggers 20786e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20794c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20804c246728SLukas Czerner unsigned long flag) \ 20816e47a3ccSLukas Czerner { \ 20826e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20836e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2084e3952fccSLukas Czerner } 2085e3952fccSLukas Czerner 2086e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 20874c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 20884c246728SLukas Czerner unsigned long flag) \ 20896e47a3ccSLukas Czerner { \ 20906e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20916e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2092e3952fccSLukas Czerner } 2093e3952fccSLukas Czerner 2094e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 20954c246728SLukas Czerner static inline unsigned long \ 20964c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 20976e47a3ccSLukas Czerner { \ 20984c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2099e3952fccSLukas Czerner } 21006e47a3ccSLukas Czerner 2101e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 21026e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2103e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2104e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 21056e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2106e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2107e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2108e3952fccSLukas Czerner 2109e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2110e3952fccSLukas Czerner { 2111e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2112e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2113e3952fccSLukas Czerner } 21146e47a3ccSLukas Czerner 211502f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 211626092bf5STheodore Ts'o { 2117461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2118461c3af0SLukas Czerner struct fs_parse_result result; 211926092bf5STheodore Ts'o const struct mount_opts *m; 2120461c3af0SLukas Czerner int is_remount; 212108cefc7aSEric W. Biederman kuid_t uid; 212208cefc7aSEric W. Biederman kgid_t gid; 2123461c3af0SLukas Czerner int token; 2124461c3af0SLukas Czerner 2125461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2126461c3af0SLukas Czerner if (token < 0) 2127461c3af0SLukas Czerner return token; 2128461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 212926092bf5STheodore Ts'o 2130ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2131ba2e524dSLukas Czerner if (token == m->token) 2132ba2e524dSLukas Czerner break; 2133ba2e524dSLukas Czerner 2134ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2135ba2e524dSLukas Czerner 2136ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2137ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2138ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2139ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2140ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2141ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2142ba2e524dSLukas Czerner } else 2143ba2e524dSLukas Czerner return -EINVAL; 2144ba2e524dSLukas Czerner } 2145ba2e524dSLukas Czerner 2146ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2147ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2148ba2e524dSLukas Czerner param->key); 2149ba2e524dSLukas Czerner return 0; 2150ba2e524dSLukas Czerner } 2151ba2e524dSLukas Czerner 2152ba2e524dSLukas Czerner switch (token) { 215357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2154ba2e524dSLukas Czerner case Opt_usrjquota: 2155461c3af0SLukas Czerner if (!*param->string) 2156e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2157461c3af0SLukas Czerner else 2158e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2159ba2e524dSLukas Czerner case Opt_grpjquota: 2160461c3af0SLukas Czerner if (!*param->string) 2161e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2162461c3af0SLukas Czerner else 2163e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 216457f73c2cSTheodore Ts'o #endif 216526092bf5STheodore Ts'o case Opt_sb: 21667edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21677edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21687edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21697edfd85bSLukas Czerner } else { 21707edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21717edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21727edfd85bSLukas Czerner } 217302f960f8SLukas Czerner return 0; 217426092bf5STheodore Ts'o case Opt_removed: 2175da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2176461c3af0SLukas Czerner param->key); 217702f960f8SLukas Czerner return 0; 217826092bf5STheodore Ts'o case Opt_abort: 2179e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 218002f960f8SLukas Czerner return 0; 21814f74d15fSEric Biggers case Opt_inlinecrypt: 21824f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21836e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21844f74d15fSEric Biggers #else 2185da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21864f74d15fSEric Biggers #endif 218702f960f8SLukas Czerner return 0; 2188461c3af0SLukas Czerner case Opt_errors: 21896e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2190ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2191ba2e524dSLukas Czerner return 0; 2192ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2193ba2e524dSLukas Czerner case Opt_jqfmt: 2194ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2195ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2196ba2e524dSLukas Czerner return 0; 2197ba2e524dSLukas Czerner #endif 2198ba2e524dSLukas Czerner case Opt_data: 2199ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2200ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2201ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2202ba2e524dSLukas Czerner return 0; 2203ba2e524dSLukas Czerner case Opt_commit: 2204461c3af0SLukas Czerner if (result.uint_32 == 0) 2205934b0de1SWang Jianjian result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE; 2206461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2207da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22089ba55543Szhangyi (F) "Invalid commit interval %d, " 22099ba55543Szhangyi (F) "must be smaller than %d", 2210461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2211da812f61SLukas Czerner return -EINVAL; 22129ba55543Szhangyi (F) } 22136e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22146e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2215ba2e524dSLukas Czerner return 0; 2216ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22176e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2218da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2219461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2220da812f61SLukas Czerner return -EINVAL; 22219803387cSTheodore Ts'o } 22226e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 22236e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2224ba2e524dSLukas Czerner return 0; 2225ba2e524dSLukas Czerner case Opt_max_batch_time: 22266e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 22276e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2228ba2e524dSLukas Czerner return 0; 2229ba2e524dSLukas Czerner case Opt_min_batch_time: 22306e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 22316e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2232ba2e524dSLukas Czerner return 0; 2233ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2234461c3af0SLukas Czerner if (result.uint_32 && 2235461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2236461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2237da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2238e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2239e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2240da812f61SLukas Czerner return -EINVAL; 224126092bf5STheodore Ts'o } 22426e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 22436e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2244ba2e524dSLukas Czerner return 0; 2245ba2e524dSLukas Czerner case Opt_init_itable: 22466e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22476e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2248461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22496e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22506e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2251ba2e524dSLukas Czerner return 0; 2252ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22536e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22546e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2255ba2e524dSLukas Czerner return 0; 22568016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2257ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22586e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22596e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2260ba2e524dSLukas Czerner return 0; 22618016e29fSHarshad Shirwadkar #endif 2262ba2e524dSLukas Czerner case Opt_stripe: 22636e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22646e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2265ba2e524dSLukas Czerner return 0; 2266ba2e524dSLukas Czerner case Opt_resuid: 2267461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22680efb3b23SJan Kara if (!uid_valid(uid)) { 2269da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2270461c3af0SLukas Czerner result.uint_32); 2271da812f61SLukas Czerner return -EINVAL; 22720efb3b23SJan Kara } 22736e47a3ccSLukas Czerner ctx->s_resuid = uid; 22746e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2275ba2e524dSLukas Czerner return 0; 2276ba2e524dSLukas Czerner case Opt_resgid: 2277461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22780efb3b23SJan Kara if (!gid_valid(gid)) { 2279da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2280461c3af0SLukas Czerner result.uint_32); 2281da812f61SLukas Czerner return -EINVAL; 22820efb3b23SJan Kara } 22836e47a3ccSLukas Czerner ctx->s_resgid = gid; 22846e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2285ba2e524dSLukas Czerner return 0; 2286ba2e524dSLukas Czerner case Opt_journal_dev: 22870efb3b23SJan Kara if (is_remount) { 2288da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22890efb3b23SJan Kara "Cannot specify journal on remount"); 2290da812f61SLukas Czerner return -EINVAL; 22910efb3b23SJan Kara } 2292461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22936e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2294ba2e524dSLukas Czerner return 0; 2295ba2e524dSLukas Czerner case Opt_journal_path: 2296ba2e524dSLukas Czerner { 2297ad4eec61SEric Sandeen struct inode *journal_inode; 2298ad4eec61SEric Sandeen struct path path; 2299ad4eec61SEric Sandeen int error; 2300ad4eec61SEric Sandeen 2301ad4eec61SEric Sandeen if (is_remount) { 2302da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2303ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2304da812f61SLukas Czerner return -EINVAL; 2305ad4eec61SEric Sandeen } 2306ad4eec61SEric Sandeen 2307e3ea75eeSLukas Czerner error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path); 2308ad4eec61SEric Sandeen if (error) { 2309da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2310461c3af0SLukas Czerner "journal device path"); 2311da812f61SLukas Czerner return -EINVAL; 2312ad4eec61SEric Sandeen } 2313ad4eec61SEric Sandeen 23142b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2315461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23166e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2317ad4eec61SEric Sandeen path_put(&path); 2318ba2e524dSLukas Czerner return 0; 2319ba2e524dSLukas Czerner } 2320ba2e524dSLukas Czerner case Opt_journal_ioprio: 2321461c3af0SLukas Czerner if (result.uint_32 > 7) { 2322da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 23230efb3b23SJan Kara " (must be 0-7)"); 2324da812f61SLukas Czerner return -EINVAL; 23250efb3b23SJan Kara } 2326461c3af0SLukas Czerner ctx->journal_ioprio = 2327461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 23286e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2329ba2e524dSLukas Czerner return 0; 2330ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 233185456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2332ba2e524dSLukas Czerner case Opt_dax: 2333ba2e524dSLukas Czerner case Opt_dax_type: 2334ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2335ba2e524dSLukas Czerner { 2336ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2337ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2338ba2e524dSLukas Czerner 2339ba2e524dSLukas Czerner switch (type) { 23409cb20f94SIra Weiny case Opt_dax: 23419cb20f94SIra Weiny case Opt_dax_always: 2342ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23436e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23449cb20f94SIra Weiny break; 23459cb20f94SIra Weiny case Opt_dax_never: 2346ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23476e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23489cb20f94SIra Weiny break; 23499cb20f94SIra Weiny case Opt_dax_inode: 23506e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23516e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23529cb20f94SIra Weiny /* Strictly for printing options */ 2353ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23549cb20f94SIra Weiny break; 23559cb20f94SIra Weiny } 2356ba2e524dSLukas Czerner return 0; 2357ba2e524dSLukas Czerner } 2358ef83b6e8SDan Williams #else 2359da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2360da812f61SLukas Czerner return -EINVAL; 2361923ae0ffSRoss Zwisler #endif 2362ba2e524dSLukas Czerner case Opt_data_err: 2363ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23646e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2365ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23666e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2367ba2e524dSLukas Czerner return 0; 2368ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 236927b38686SOjaswin Mujoo if (result.int_32 == 1) { 237027b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 237127b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 237227b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 237327b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 237427b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 237527b38686SOjaswin Mujoo } else { 2376da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2377196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2378da812f61SLukas Czerner return -EINVAL; 2379196e402aSHarshad Shirwadkar } 2380ba2e524dSLukas Czerner return 0; 2381ba2e524dSLukas Czerner } 2382ba2e524dSLukas Czerner 2383ba2e524dSLukas Czerner /* 2384ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2385ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2386ba2e524dSLukas Czerner */ 2387ba2e524dSLukas Czerner if (m->token == Opt_err) { 2388ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2389ba2e524dSLukas Czerner param->key); 2390ba2e524dSLukas Czerner WARN_ON(1); 2391ba2e524dSLukas Czerner return -EINVAL; 2392ba2e524dSLukas Czerner } 2393ba2e524dSLukas Czerner 2394ba2e524dSLukas Czerner else { 2395461c3af0SLukas Czerner unsigned int set = 0; 2396461c3af0SLukas Czerner 2397461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2398461c3af0SLukas Czerner result.uint_32 > 0) 2399461c3af0SLukas Czerner set = 1; 2400461c3af0SLukas Czerner 240126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2402461c3af0SLukas Czerner set = !set; 240326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2404da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2405461c3af0SLukas Czerner "buggy handling of option %s", 2406461c3af0SLukas Czerner param->key); 240726092bf5STheodore Ts'o WARN_ON(1); 2408da812f61SLukas Czerner return -EINVAL; 240926092bf5STheodore Ts'o } 2410995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2411461c3af0SLukas Czerner if (set != 0) 24126e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2413995a3ed6SHarshad Shirwadkar else 24146e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2415995a3ed6SHarshad Shirwadkar } else { 2416461c3af0SLukas Czerner if (set != 0) 24176e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 241826092bf5STheodore Ts'o else 24196e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 242026092bf5STheodore Ts'o } 2421995a3ed6SHarshad Shirwadkar } 2422ba2e524dSLukas Czerner 242302f960f8SLukas Czerner return 0; 242426092bf5STheodore Ts'o } 242526092bf5STheodore Ts'o 24267edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2427ac27a0ecSDave Kleikamp { 2428461c3af0SLukas Czerner struct fs_parameter param; 2429461c3af0SLukas Czerner int ret; 2430461c3af0SLukas Czerner char *key; 2431ac27a0ecSDave Kleikamp 2432ac27a0ecSDave Kleikamp if (!options) 24337edfd85bSLukas Czerner return 0; 2434461c3af0SLukas Czerner 2435461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2436461c3af0SLukas Czerner if (*key) { 2437461c3af0SLukas Czerner size_t v_len = 0; 2438461c3af0SLukas Czerner char *value = strchr(key, '='); 2439461c3af0SLukas Czerner 2440461c3af0SLukas Czerner param.type = fs_value_is_flag; 2441461c3af0SLukas Czerner param.string = NULL; 2442461c3af0SLukas Czerner 2443461c3af0SLukas Czerner if (value) { 2444461c3af0SLukas Czerner if (value == key) 2445ac27a0ecSDave Kleikamp continue; 2446461c3af0SLukas Czerner 2447461c3af0SLukas Czerner *value++ = 0; 2448461c3af0SLukas Czerner v_len = strlen(value); 2449461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2450461c3af0SLukas Czerner GFP_KERNEL); 2451461c3af0SLukas Czerner if (!param.string) 24527edfd85bSLukas Czerner return -ENOMEM; 2453461c3af0SLukas Czerner param.type = fs_value_is_string; 2454461c3af0SLukas Czerner } 2455461c3af0SLukas Czerner 2456461c3af0SLukas Czerner param.key = key; 2457461c3af0SLukas Czerner param.size = v_len; 2458461c3af0SLukas Czerner 245902f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2460461c3af0SLukas Czerner if (param.string) 2461461c3af0SLukas Czerner kfree(param.string); 2462461c3af0SLukas Czerner if (ret < 0) 24637edfd85bSLukas Czerner return ret; 2464ac27a0ecSDave Kleikamp } 2465461c3af0SLukas Czerner } 2466461c3af0SLukas Czerner 24677edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2468da812f61SLukas Czerner if (ret < 0) 24697edfd85bSLukas Czerner return ret; 24707edfd85bSLukas Czerner 24717edfd85bSLukas Czerner return 0; 24727edfd85bSLukas Czerner } 24737edfd85bSLukas Czerner 24747edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24757edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24767edfd85bSLukas Czerner { 24777edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24787edfd85bSLukas Czerner char *s_mount_opts = NULL; 24797edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24807edfd85bSLukas Czerner struct fs_context *fc = NULL; 24817edfd85bSLukas Czerner int ret = -ENOMEM; 24827edfd85bSLukas Czerner 24837edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2484da812f61SLukas Czerner return 0; 2485da812f61SLukas Czerner 24867edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24877edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24887edfd85bSLukas Czerner GFP_KERNEL); 24897edfd85bSLukas Czerner if (!s_mount_opts) 24907edfd85bSLukas Czerner return ret; 2491e6e268cbSLukas Czerner 24927edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24937edfd85bSLukas Czerner if (!fc) 24947edfd85bSLukas Czerner goto out_free; 2495e6e268cbSLukas Czerner 24967edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 24977edfd85bSLukas Czerner if (!s_ctx) 24987edfd85bSLukas Czerner goto out_free; 24997edfd85bSLukas Czerner 25007edfd85bSLukas Czerner fc->fs_private = s_ctx; 25017edfd85bSLukas Czerner fc->s_fs_info = sbi; 25027edfd85bSLukas Czerner 25037edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 25047edfd85bSLukas Czerner if (ret < 0) 25057edfd85bSLukas Czerner goto parse_failed; 25067edfd85bSLukas Czerner 25077edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 25087edfd85bSLukas Czerner if (ret < 0) { 25097edfd85bSLukas Czerner parse_failed: 25107edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 25117edfd85bSLukas Czerner "failed to parse options in superblock: %s", 25127edfd85bSLukas Czerner s_mount_opts); 25137edfd85bSLukas Czerner ret = 0; 25147edfd85bSLukas Czerner goto out_free; 25157edfd85bSLukas Czerner } 25167edfd85bSLukas Czerner 25177edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 25187edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 25197edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 25207edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 25217edfd85bSLukas Czerner 252285456054SEric Biggers ext4_apply_options(fc, sb); 252385456054SEric Biggers ret = 0; 25247edfd85bSLukas Czerner 25257edfd85bSLukas Czerner out_free: 2526c069db76SEric Biggers if (fc) { 2527c069db76SEric Biggers ext4_fc_free(fc); 25287edfd85bSLukas Czerner kfree(fc); 2529c069db76SEric Biggers } 25307edfd85bSLukas Czerner kfree(s_mount_opts); 25317edfd85bSLukas Czerner return ret; 25324c94bff9SLukas Czerner } 25334c94bff9SLukas Czerner 2534e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2535e6e268cbSLukas Czerner struct super_block *sb) 2536e6e268cbSLukas Czerner { 2537e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 25386e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2539e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2540e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2541e6e268cbSLukas Czerner char *qname; 2542e6e268cbSLukas Czerner int i; 2543e6e268cbSLukas Czerner 25446e47a3ccSLukas Czerner if (quota_feature) 25456e47a3ccSLukas Czerner return; 25466e47a3ccSLukas Czerner 25476e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2548e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2549e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2550e6e268cbSLukas Czerner continue; 25516e47a3ccSLukas Czerner 2552e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25534c1bd5a9SLukas Czerner if (qname) 25544c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2555e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 255613b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 255713b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 255813b215a9SLukas Czerner if (qname) 255910e4f310SUladzislau Rezki (Sony) kfree_rcu_mightsleep(qname); 2560e6e268cbSLukas Czerner } 25616e47a3ccSLukas Czerner } 25626e47a3ccSLukas Czerner 25636e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25646e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2565e6e268cbSLukas Czerner #endif 2566e6e268cbSLukas Czerner } 2567e6e268cbSLukas Czerner 2568e6e268cbSLukas Czerner /* 2569e6e268cbSLukas Czerner * Check quota settings consistency. 2570e6e268cbSLukas Czerner */ 2571e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2572e6e268cbSLukas Czerner struct super_block *sb) 2573e6e268cbSLukas Czerner { 2574e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2575e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2576e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2577e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2578e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25796e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25806e47a3ccSLukas Czerner int quota_flags, i; 2581e6e268cbSLukas Czerner 25826e47a3ccSLukas Czerner /* 25836e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25846e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25856e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25866e47a3ccSLukas Czerner */ 25876e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25886e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25896e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25906e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25916e47a3ccSLukas Czerner return -EINVAL; 25926e47a3ccSLukas Czerner } 25936e47a3ccSLukas Czerner 25946e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 25956e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 25966e47a3ccSLukas Czerner if (quota_loaded && 25976e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 25986e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 25996e47a3ccSLukas Czerner goto err_quota_change; 26006e47a3ccSLukas Czerner 26016e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2602e6e268cbSLukas Czerner 2603e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2604e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2605e6e268cbSLukas Czerner continue; 2606e6e268cbSLukas Czerner 26076e47a3ccSLukas Czerner if (quota_loaded && 26086e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2609e6e268cbSLukas Czerner goto err_jquota_change; 2610e6e268cbSLukas Czerner 2611e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 261213b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2613e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2614e6e268cbSLukas Czerner goto err_jquota_specified; 2615e6e268cbSLukas Czerner } 26166e47a3ccSLukas Czerner 26176e47a3ccSLukas Czerner if (quota_feature) { 26186e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 26196e47a3ccSLukas Czerner "Journaled quota options ignored when " 26206e47a3ccSLukas Czerner "QUOTA feature is enabled"); 26216e47a3ccSLukas Czerner return 0; 26226e47a3ccSLukas Czerner } 2623e6e268cbSLukas Czerner } 2624e6e268cbSLukas Czerner 26256e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2626e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 26276e47a3ccSLukas Czerner goto err_jquota_change; 2628e6e268cbSLukas Czerner if (quota_feature) { 2629e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2630e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2631e6e268cbSLukas Czerner return 0; 2632e6e268cbSLukas Czerner } 2633e6e268cbSLukas Czerner } 26346e47a3ccSLukas Czerner 26356e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 26366e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 26376e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 26386e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 26396e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 26406e47a3ccSLukas Czerner 26416e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 26426e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 26436e47a3ccSLukas Czerner 26446e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 26456e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 26466e47a3ccSLukas Czerner 26476e47a3ccSLukas Czerner if (usr_qf_name) { 26486e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26496e47a3ccSLukas Czerner usrquota = false; 26506e47a3ccSLukas Czerner } 26516e47a3ccSLukas Czerner if (grp_qf_name) { 26526e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26536e47a3ccSLukas Czerner grpquota = false; 26546e47a3ccSLukas Czerner } 26556e47a3ccSLukas Czerner 26566e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26576e47a3ccSLukas Czerner if (usrquota || grpquota) { 26586e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26596e47a3ccSLukas Czerner "format mixing"); 26606e47a3ccSLukas Czerner return -EINVAL; 26616e47a3ccSLukas Czerner } 26626e47a3ccSLukas Czerner 26636e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26646e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26656e47a3ccSLukas Czerner "not specified"); 26666e47a3ccSLukas Czerner return -EINVAL; 26676e47a3ccSLukas Czerner } 26686e47a3ccSLukas Czerner } 26696e47a3ccSLukas Czerner 2670e6e268cbSLukas Czerner return 0; 2671e6e268cbSLukas Czerner 2672e6e268cbSLukas Czerner err_quota_change: 2673e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2674e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2675e6e268cbSLukas Czerner return -EINVAL; 2676e6e268cbSLukas Czerner err_jquota_change: 2677e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2678e6e268cbSLukas Czerner "options when quota turned on"); 2679e6e268cbSLukas Czerner return -EINVAL; 2680e6e268cbSLukas Czerner err_jquota_specified: 2681e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2682e6e268cbSLukas Czerner QTYPE2NAME(i)); 2683e6e268cbSLukas Czerner return -EINVAL; 2684e6e268cbSLukas Czerner #else 2685e6e268cbSLukas Czerner return 0; 2686e6e268cbSLukas Czerner #endif 2687e6e268cbSLukas Czerner } 2688e6e268cbSLukas Czerner 26895f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26905f41fdaeSEric Biggers struct super_block *sb) 26915f41fdaeSEric Biggers { 26925f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26935f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 26945f41fdaeSEric Biggers 269585456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 26965f41fdaeSEric Biggers return 0; 26975f41fdaeSEric Biggers 26985f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 26995f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 27005f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 27015f41fdaeSEric Biggers return -EINVAL; 27025f41fdaeSEric Biggers } 27035f41fdaeSEric Biggers /* 27045f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 27055f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 27065f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 27075f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 27085f41fdaeSEric Biggers */ 270985456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 271085456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 271185456054SEric Biggers &ctx->dummy_enc_policy)) 271285456054SEric Biggers return 0; 27135f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 271485456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 27155f41fdaeSEric Biggers return -EINVAL; 27165f41fdaeSEric Biggers } 271785456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 271885456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 271985456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 272085456054SEric Biggers &ctx->dummy_enc_policy)) 27215f41fdaeSEric Biggers return 0; 272285456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 272385456054SEric Biggers "Conflicting test_dummy_encryption options"); 272485456054SEric Biggers return -EINVAL; 272585456054SEric Biggers } 27267959eb19SEric Biggers return 0; 272785456054SEric Biggers } 272885456054SEric Biggers 272985456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 273085456054SEric Biggers struct super_block *sb) 273185456054SEric Biggers { 273285456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 273385456054SEric Biggers /* if already set, it was already verified to be the same */ 273485456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 273585456054SEric Biggers return; 273685456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 273785456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 273885456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27395f41fdaeSEric Biggers } 27405f41fdaeSEric Biggers 2741b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2742b6bd2435SLukas Czerner struct super_block *sb) 2743b6bd2435SLukas Czerner { 2744b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27456e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27466e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27475f41fdaeSEric Biggers int err; 2748b6bd2435SLukas Czerner 2749b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2750b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2751b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2752b6bd2435SLukas Czerner return -EINVAL; 2753b6bd2435SLukas Czerner } 2754b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2755b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2756b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2757b6bd2435SLukas Czerner return -EINVAL; 2758b6bd2435SLukas Czerner } 2759b6bd2435SLukas Czerner 27606e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27616e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27626e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27636e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27646e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27656e47a3ccSLukas Czerner return -EINVAL; 27666e47a3ccSLukas Czerner } 27676e47a3ccSLukas Czerner 27686e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27696e47a3ccSLukas Czerner int blocksize = 27706e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27716e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27726e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27736e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27746e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27756e47a3ccSLukas Czerner } 27766e47a3ccSLukas Czerner 27775f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27785f41fdaeSEric Biggers if (err) 27795f41fdaeSEric Biggers return err; 27806e47a3ccSLukas Czerner 27816e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27826e47a3ccSLukas Czerner if (!sbi->s_journal) { 27836e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27846e47a3ccSLukas Czerner "Remounting file system with no journal " 27856e47a3ccSLukas Czerner "so ignoring journalled data option"); 27866e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27874c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27884c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27896e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27906e47a3ccSLukas Czerner "on remount"); 27916e47a3ccSLukas Czerner return -EINVAL; 27926e47a3ccSLukas Czerner } 27936e47a3ccSLukas Czerner } 27946e47a3ccSLukas Czerner 27956e47a3ccSLukas Czerner if (is_remount) { 27966e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27976e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27986e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27996e47a3ccSLukas Czerner "both data=journal and dax"); 28006e47a3ccSLukas Czerner return -EINVAL; 28016e47a3ccSLukas Czerner } 28026e47a3ccSLukas Czerner 28036e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28046e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28056e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28066e47a3ccSLukas Czerner fail_dax_change_remount: 28076e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28086e47a3ccSLukas Czerner "dax mount option while remounting"); 28096e47a3ccSLukas Czerner return -EINVAL; 28106e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28116e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28126e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28136e47a3ccSLukas Czerner goto fail_dax_change_remount; 28146e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28156e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28166e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28176e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28186e47a3ccSLukas Czerner goto fail_dax_change_remount; 28196e47a3ccSLukas Czerner } 28206e47a3ccSLukas Czerner } 28216e47a3ccSLukas Czerner 2822b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2823b6bd2435SLukas Czerner } 2824b6bd2435SLukas Czerner 282585456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28266e47a3ccSLukas Czerner { 28276e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28286e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28296e47a3ccSLukas Czerner 28306e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28316e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28326e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28336e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28346e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28356e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28366e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28376e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28386e47a3ccSLukas Czerner 28396e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28406e47a3ccSLukas Czerner APPLY(s_commit_interval); 28416e47a3ccSLukas Czerner APPLY(s_stripe); 28426e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28436e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28446e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28456e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28466e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28476e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28486e47a3ccSLukas Czerner APPLY(s_resgid); 28496e47a3ccSLukas Czerner APPLY(s_resuid); 28506e47a3ccSLukas Czerner 28516e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28526e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28536e47a3ccSLukas Czerner #endif 28546e47a3ccSLukas Czerner 28556e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 285685456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28576e47a3ccSLukas Czerner } 28586e47a3ccSLukas Czerner 28596e47a3ccSLukas Czerner 2860da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28614c94bff9SLukas Czerner { 2862ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28636e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28644c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28656e47a3ccSLukas Czerner 28666e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28676e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28686e47a3ccSLukas Czerner 286933458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28706e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28716e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2872ac27a0ecSDave Kleikamp 28736e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28746e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2875ac27a0ecSDave Kleikamp 28766e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28776e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2878da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2879b31e1552SEric Sandeen "format mixing"); 2880da812f61SLukas Czerner return -EINVAL; 2881ac27a0ecSDave Kleikamp } 2882ac27a0ecSDave Kleikamp } 2883ac27a0ecSDave Kleikamp #endif 28846e47a3ccSLukas Czerner return 1; 2885ac27a0ecSDave Kleikamp } 2886ac27a0ecSDave Kleikamp 28872adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28882adf6da8STheodore Ts'o struct super_block *sb) 28892adf6da8STheodore Ts'o { 28902adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28912adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 289233458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28932adf6da8STheodore Ts'o 28942adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28952adf6da8STheodore Ts'o char *fmtname = ""; 28962adf6da8STheodore Ts'o 28972adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28982adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28992adf6da8STheodore Ts'o fmtname = "vfsold"; 29002adf6da8STheodore Ts'o break; 29012adf6da8STheodore Ts'o case QFMT_VFS_V0: 29022adf6da8STheodore Ts'o fmtname = "vfsv0"; 29032adf6da8STheodore Ts'o break; 29042adf6da8STheodore Ts'o case QFMT_VFS_V1: 29052adf6da8STheodore Ts'o fmtname = "vfsv1"; 29062adf6da8STheodore Ts'o break; 29072adf6da8STheodore Ts'o } 29082adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29092adf6da8STheodore Ts'o } 29102adf6da8STheodore Ts'o 291133458eabSTheodore Ts'o rcu_read_lock(); 291233458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 291333458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 291433458eabSTheodore Ts'o if (usr_qf_name) 291533458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 291633458eabSTheodore Ts'o if (grp_qf_name) 291733458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 291833458eabSTheodore Ts'o rcu_read_unlock(); 29192adf6da8STheodore Ts'o #endif 29202adf6da8STheodore Ts'o } 29212adf6da8STheodore Ts'o 29225a916be1STheodore Ts'o static const char *token2str(int token) 29235a916be1STheodore Ts'o { 292497d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29255a916be1STheodore Ts'o 292697d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 292797d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29285a916be1STheodore Ts'o break; 292997d8a670SLukas Czerner return spec->name; 29305a916be1STheodore Ts'o } 29315a916be1STheodore Ts'o 29322adf6da8STheodore Ts'o /* 29332adf6da8STheodore Ts'o * Show an option if 29342adf6da8STheodore Ts'o * - it's set to a non-default value OR 29352adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29362adf6da8STheodore Ts'o */ 293766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 293866acdcf4STheodore Ts'o int nodefs) 29392adf6da8STheodore Ts'o { 29402adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29412adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 2942e3645d72SZhang Yi int def_errors; 29435a916be1STheodore Ts'o const struct mount_opts *m; 294466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29452adf6da8STheodore Ts'o 294666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 294766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29482adf6da8STheodore Ts'o 29492adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29505a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29515a916be1STheodore Ts'o 29525a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29535a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 2954e3645d72SZhang Yi int opt_2 = m->flags & MOPT_2; 2955e3645d72SZhang Yi unsigned int mount_opt, def_mount_opt; 2956e3645d72SZhang Yi 29575a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2958ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29595a916be1STheodore Ts'o continue; 2960e3645d72SZhang Yi 2961e3645d72SZhang Yi if (opt_2) { 2962e3645d72SZhang Yi mount_opt = sbi->s_mount_opt2; 2963e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt2; 2964e3645d72SZhang Yi } else { 2965e3645d72SZhang Yi mount_opt = sbi->s_mount_opt; 2966e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt; 2967e3645d72SZhang Yi } 2968e3645d72SZhang Yi /* skip if same as the default */ 2969e3645d72SZhang Yi if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt))) 2970e3645d72SZhang Yi continue; 2971e3645d72SZhang Yi /* select Opt_noFoo vs Opt_Foo */ 29725a916be1STheodore Ts'o if ((want_set && 2973e3645d72SZhang Yi (mount_opt & m->mount_opt) != m->mount_opt) || 2974e3645d72SZhang Yi (!want_set && (mount_opt & m->mount_opt))) 2975e3645d72SZhang Yi continue; 29765a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29775a916be1STheodore Ts'o } 29785a916be1STheodore Ts'o 297908cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29805a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 298108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 298208cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 298308cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29845a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 298508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 298608cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 298766acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29885a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29895a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29902adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29915a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29922adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29935a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 299466acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29955a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 299666acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29975a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 299866acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29995a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 300066acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 30015a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 300268afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 3003e3645d72SZhang Yi (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 30042adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 30055a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30062adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30075a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30082adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30095a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30105a916be1STheodore Ts'o } 301166acdcf4STheodore Ts'o if (nodefs || 301266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30135a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30142adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30152adf6da8STheodore Ts'o 3016ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 301766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30185a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3019df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3020df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30217915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30227915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3023ed318a6cSEric Biggers 3024ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30252adf6da8STheodore Ts'o 30264f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30274f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30284f74d15fSEric Biggers 30299cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30309cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30319cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30329cb20f94SIra Weiny else 30339cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30349cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30359cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30369cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30379cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30389cb20f94SIra Weiny } 30393fa5d23eSOjaswin Mujoo 30403fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30413fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30423fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 30433fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30443fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30453fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 30463fa5d23eSOjaswin Mujoo } 30473fa5d23eSOjaswin Mujoo 30482adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30492adf6da8STheodore Ts'o return 0; 30502adf6da8STheodore Ts'o } 30512adf6da8STheodore Ts'o 305266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 305366acdcf4STheodore Ts'o { 305466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 305566acdcf4STheodore Ts'o } 305666acdcf4STheodore Ts'o 3057ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 305866acdcf4STheodore Ts'o { 305966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 306066acdcf4STheodore Ts'o int rc; 306166acdcf4STheodore Ts'o 3062bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 306366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 306466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 306566acdcf4STheodore Ts'o return rc; 306666acdcf4STheodore Ts'o } 306766acdcf4STheodore Ts'o 3068617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3069ac27a0ecSDave Kleikamp int read_only) 3070ac27a0ecSDave Kleikamp { 3071617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3072c89128a0SJaegeuk Kim int err = 0; 3073ac27a0ecSDave Kleikamp 3074617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3075b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3076b31e1552SEric Sandeen "forcing read-only mode"); 3077c89128a0SJaegeuk Kim err = -EROFS; 30785adaccacSyangerkun goto done; 3079ac27a0ecSDave Kleikamp } 3080ac27a0ecSDave Kleikamp if (read_only) 3081281b5995STheodore Ts'o goto done; 3082617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3083b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3084b31e1552SEric Sandeen "running e2fsck is recommended"); 3085c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3086b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3087b31e1552SEric Sandeen "warning: mounting fs with errors, " 3088b31e1552SEric Sandeen "running e2fsck is recommended"); 3089ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3090ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3091ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3092b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3093b31e1552SEric Sandeen "warning: maximal mount count reached, " 3094b31e1552SEric Sandeen "running e2fsck is recommended"); 3095ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30966a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30976a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3098b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3099b31e1552SEric Sandeen "warning: checktime reached, " 3100b31e1552SEric Sandeen "running e2fsck is recommended"); 31010390131bSFrank Mayhar if (!sbi->s_journal) 3102216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3103ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3104617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3105e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31066a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 310702f310fcSJan Kara if (sbi->s_journal) { 3108e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 310902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 311002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 311102f310fcSJan Kara } 3112ac27a0ecSDave Kleikamp 31134392fbc4SJan Kara err = ext4_commit_super(sb); 3114281b5995STheodore Ts'o done: 3115ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3116a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3117a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3118ac27a0ecSDave Kleikamp sb->s_blocksize, 3119ac27a0ecSDave Kleikamp sbi->s_groups_count, 3120617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3121617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3122a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3123c89128a0SJaegeuk Kim return err; 3124ac27a0ecSDave Kleikamp } 3125ac27a0ecSDave Kleikamp 3126117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3127117fff10STheodore Ts'o { 3128117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31297c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 313037b0b6b8SDan Carpenter int size, i, j; 3131117fff10STheodore Ts'o 3132117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3133117fff10STheodore Ts'o return 0; 3134117fff10STheodore Ts'o 3135117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3136117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3137117fff10STheodore Ts'o return 0; 3138117fff10STheodore Ts'o 31397c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31407c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3141117fff10STheodore Ts'o if (!new_groups) { 31427c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31437c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3144117fff10STheodore Ts'o return -ENOMEM; 3145117fff10STheodore Ts'o } 31467c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31477c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31487c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31497c990728SSuraj Jitindar Singh GFP_KERNEL); 31507c990728SSuraj Jitindar Singh if (!new_groups[i]) { 315137b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 315237b0b6b8SDan Carpenter kvfree(new_groups[j]); 31537c990728SSuraj Jitindar Singh kvfree(new_groups); 31547c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31557c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31567c990728SSuraj Jitindar Singh return -ENOMEM; 3157117fff10STheodore Ts'o } 31587c990728SSuraj Jitindar Singh } 31597c990728SSuraj Jitindar Singh rcu_read_lock(); 31607c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31617c990728SSuraj Jitindar Singh if (old_groups) 31627c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31637c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31647c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31657c990728SSuraj Jitindar Singh rcu_read_unlock(); 31667c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31677c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31687c990728SSuraj Jitindar Singh if (old_groups) 31697c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3170117fff10STheodore Ts'o return 0; 3171117fff10STheodore Ts'o } 3172117fff10STheodore Ts'o 3173772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3174772cb7c8SJose R. Santos { 3175772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3176772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31777c990728SSuraj Jitindar Singh struct flex_groups *fg; 3178772cb7c8SJose R. Santos ext4_group_t flex_group; 3179117fff10STheodore Ts'o int i, err; 3180772cb7c8SJose R. Santos 3181503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3182d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3183772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3184772cb7c8SJose R. Santos return 1; 3185772cb7c8SJose R. Santos } 3186772cb7c8SJose R. Santos 3187117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3188117fff10STheodore Ts'o if (err) 3189772cb7c8SJose R. Santos goto failed; 3190772cb7c8SJose R. Santos 3191772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 319288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3193772cb7c8SJose R. Santos 3194772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31957c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31967c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 319790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31987c990728SSuraj Jitindar Singh &fg->free_clusters); 31997c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3200772cb7c8SJose R. Santos } 3201772cb7c8SJose R. Santos 3202772cb7c8SJose R. Santos return 1; 3203772cb7c8SJose R. Santos failed: 3204772cb7c8SJose R. Santos return 0; 3205772cb7c8SJose R. Santos } 3206772cb7c8SJose R. Santos 3207e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3208717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3209717d50e4SAndreas Dilger { 3210b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3211717d50e4SAndreas Dilger __u16 crc = 0; 3212717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3213e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3214717d50e4SAndreas Dilger 32159aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3216feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3217feb0ab32SDarrick J. Wong __u32 csum32; 3218b47820edSDaeho Jeong __u16 dummy_csum = 0; 3219feb0ab32SDarrick J. Wong 3220feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3221feb0ab32SDarrick J. Wong sizeof(le_group)); 3222b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3223b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3224b47820edSDaeho Jeong sizeof(dummy_csum)); 3225b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3226b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3227b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3228b47820edSDaeho Jeong sbi->s_desc_size - offset); 3229feb0ab32SDarrick J. Wong 3230feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3231feb0ab32SDarrick J. Wong goto out; 3232feb0ab32SDarrick J. Wong } 3233feb0ab32SDarrick J. Wong 3234feb0ab32SDarrick J. Wong /* old crc16 code */ 3235e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3236813d32f9SDarrick J. Wong return 0; 3237813d32f9SDarrick J. Wong 3238717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3239717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3240717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3241717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3242717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3243e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3244717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3245717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3246717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3247717d50e4SAndreas Dilger offset); 3248717d50e4SAndreas Dilger 3249feb0ab32SDarrick J. Wong out: 3250717d50e4SAndreas Dilger return cpu_to_le16(crc); 3251717d50e4SAndreas Dilger } 3252717d50e4SAndreas Dilger 3253feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3254717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3255717d50e4SAndreas Dilger { 3256feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3257e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3258717d50e4SAndreas Dilger return 0; 3259717d50e4SAndreas Dilger 3260717d50e4SAndreas Dilger return 1; 3261717d50e4SAndreas Dilger } 3262717d50e4SAndreas Dilger 3263feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3264feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3265feb0ab32SDarrick J. Wong { 3266feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3267feb0ab32SDarrick J. Wong return; 3268e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3269feb0ab32SDarrick J. Wong } 3270feb0ab32SDarrick J. Wong 3271ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3272bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3273829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3274bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3275ac27a0ecSDave Kleikamp { 3276617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3277617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3278617ba13bSMingming Cao ext4_fsblk_t last_block; 327944de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3280bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3281bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3282bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3283ce421581SJose R. Santos int flexbg_flag = 0; 3284bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3285ac27a0ecSDave Kleikamp 3286e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3287ce421581SJose R. Santos flexbg_flag = 1; 3288ce421581SJose R. Santos 3289617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3290ac27a0ecSDave Kleikamp 3291197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3292197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3293197cd65aSAkinobu Mita 3294ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3295bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3296ac27a0ecSDave Kleikamp else 3297ac27a0ecSDave Kleikamp last_block = first_block + 3298617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3299ac27a0ecSDave Kleikamp 3300bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3301bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3302bfff6873SLukas Czerner grp = i; 3303bfff6873SLukas Czerner 33048fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3305829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3306829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3307829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3308829fa70dSTheodore Ts'o "superblock", i); 330918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 331018db4b4eSTheodore Ts'o return 0; 3311829fa70dSTheodore Ts'o } 331277260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 331377260807STheodore Ts'o block_bitmap <= last_bg_block) { 331477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 331577260807STheodore Ts'o "Block bitmap for group %u overlaps " 331677260807STheodore Ts'o "block group descriptors", i); 331777260807STheodore Ts'o if (!sb_rdonly(sb)) 331877260807STheodore Ts'o return 0; 331977260807STheodore Ts'o } 33202b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3321b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3322a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3323b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3324ac27a0ecSDave Kleikamp return 0; 3325ac27a0ecSDave Kleikamp } 33268fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3327829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3328829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3329829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3330829fa70dSTheodore Ts'o "superblock", i); 333118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 333218db4b4eSTheodore Ts'o return 0; 3333829fa70dSTheodore Ts'o } 333477260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 333577260807STheodore Ts'o inode_bitmap <= last_bg_block) { 333677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 333777260807STheodore Ts'o "Inode bitmap for group %u overlaps " 333877260807STheodore Ts'o "block group descriptors", i); 333977260807STheodore Ts'o if (!sb_rdonly(sb)) 334077260807STheodore Ts'o return 0; 334177260807STheodore Ts'o } 33422b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3343b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3344a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3345b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3346ac27a0ecSDave Kleikamp return 0; 3347ac27a0ecSDave Kleikamp } 33488fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3349829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3350829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3351829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3352829fa70dSTheodore Ts'o "superblock", i); 335318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 335418db4b4eSTheodore Ts'o return 0; 3355829fa70dSTheodore Ts'o } 335677260807STheodore Ts'o if (inode_table >= sb_block + 1 && 335777260807STheodore Ts'o inode_table <= last_bg_block) { 335877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335977260807STheodore Ts'o "Inode table for group %u overlaps " 336077260807STheodore Ts'o "block group descriptors", i); 336177260807STheodore Ts'o if (!sb_rdonly(sb)) 336277260807STheodore Ts'o return 0; 336377260807STheodore Ts'o } 3364bd81d8eeSLaurent Vivier if (inode_table < first_block || 33652b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3366b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3367a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3368b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3369ac27a0ecSDave Kleikamp return 0; 3370ac27a0ecSDave Kleikamp } 3371955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3372feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3374b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3375e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3376fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3377bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3378955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3379717d50e4SAndreas Dilger return 0; 3380717d50e4SAndreas Dilger } 33817ee1ec4cSLi Zefan } 3382955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3383ce421581SJose R. Santos if (!flexbg_flag) 3384617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3385ac27a0ecSDave Kleikamp } 3386bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3387bfff6873SLukas Czerner *first_not_zeroed = grp; 3388ac27a0ecSDave Kleikamp return 1; 3389ac27a0ecSDave Kleikamp } 3390ac27a0ecSDave Kleikamp 3391cd2291a4SEric Sandeen /* 3392cd2291a4SEric Sandeen * Maximal extent format file size. 3393cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3394cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3395cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3396cd2291a4SEric Sandeen * so that won't be a limiting factor. 3397cd2291a4SEric Sandeen * 3398f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3399f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3400f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3401f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3402f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3403f17722f9SLukas Czerner * 3404cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3405cd2291a4SEric Sandeen */ 3406f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3407cd2291a4SEric Sandeen { 3408cd2291a4SEric Sandeen loff_t res; 3409cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3410cd2291a4SEric Sandeen 341172deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 341272deb455SChristoph Hellwig 341372deb455SChristoph Hellwig if (!has_huge_files) { 3414cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3415cd2291a4SEric Sandeen 3416cd2291a4SEric Sandeen /* total blocks in file system block size */ 3417cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3418cd2291a4SEric Sandeen upper_limit <<= blkbits; 3419cd2291a4SEric Sandeen } 3420cd2291a4SEric Sandeen 3421f17722f9SLukas Czerner /* 3422f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3423f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3424f17722f9SLukas Czerner * size 3425f17722f9SLukas Czerner */ 3426f17722f9SLukas Czerner res = (1LL << 32) - 1; 3427cd2291a4SEric Sandeen res <<= blkbits; 3428cd2291a4SEric Sandeen 3429cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3430cd2291a4SEric Sandeen if (res > upper_limit) 3431cd2291a4SEric Sandeen res = upper_limit; 3432cd2291a4SEric Sandeen 3433cd2291a4SEric Sandeen return res; 3434cd2291a4SEric Sandeen } 3435ac27a0ecSDave Kleikamp 3436ac27a0ecSDave Kleikamp /* 3437cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34380fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34390fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3440ac27a0ecSDave Kleikamp */ 3441f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3442ac27a0ecSDave Kleikamp { 34435c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34440fc1b451SAneesh Kumar K.V int meta_blocks; 34455c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 344675ca6ad4SRitesh Harjani 344775ca6ad4SRitesh Harjani /* 344875ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34490b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34500b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34510b8e58a1SAndreas Dilger * 34520b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34530b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34540fc1b451SAneesh Kumar K.V */ 345572deb455SChristoph Hellwig if (!has_huge_files) { 34560fc1b451SAneesh Kumar K.V /* 345772deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 345872deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 345972deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34600fc1b451SAneesh Kumar K.V */ 34610fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34620fc1b451SAneesh Kumar K.V 34630fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34640fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34650fc1b451SAneesh Kumar K.V 34660fc1b451SAneesh Kumar K.V } else { 34678180a562SAneesh Kumar K.V /* 34688180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34698180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34708180a562SAneesh Kumar K.V * represent total number of blocks in 34718180a562SAneesh Kumar K.V * file system block size 34728180a562SAneesh Kumar K.V */ 34730fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34740fc1b451SAneesh Kumar K.V 34750fc1b451SAneesh Kumar K.V } 34760fc1b451SAneesh Kumar K.V 34775c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34785c93e8ecSZhang Yi res += ppb; 34795c93e8ecSZhang Yi res += ppb * ppb; 34805c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34815c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34825c93e8ecSZhang Yi meta_blocks = 1; 34835c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34845c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34855c93e8ecSZhang Yi /* Does block tree limit file size? */ 34865c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34875c93e8ecSZhang Yi goto check_lfs; 34885c93e8ecSZhang Yi 34895c93e8ecSZhang Yi res = upper_limit; 34905c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34915c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34920fc1b451SAneesh Kumar K.V /* indirect blocks */ 34930fc1b451SAneesh Kumar K.V meta_blocks = 1; 34945c93e8ecSZhang Yi upper_limit -= ppb; 34950fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34965c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34975c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34985c93e8ecSZhang Yi res -= meta_blocks; 34995c93e8ecSZhang Yi goto check_lfs; 35005c93e8ecSZhang Yi } 35015c93e8ecSZhang Yi meta_blocks += 1 + ppb; 35025c93e8ecSZhang Yi upper_limit -= ppb * ppb; 35035c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 35045c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 35055c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 35065c93e8ecSZhang Yi res -= meta_blocks; 35075c93e8ecSZhang Yi check_lfs: 3508ac27a0ecSDave Kleikamp res <<= bits; 35090fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35100fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35110fc1b451SAneesh Kumar K.V 35125c93e8ecSZhang Yi return res; 3513ac27a0ecSDave Kleikamp } 3514ac27a0ecSDave Kleikamp 3515617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 351670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3517ac27a0ecSDave Kleikamp { 3518617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3519fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3520ac27a0ecSDave Kleikamp int has_super = 0; 3521ac27a0ecSDave Kleikamp 3522ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3523ac27a0ecSDave Kleikamp 3524e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 352570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3526ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3527617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3528ac27a0ecSDave Kleikamp has_super = 1; 35290b8e58a1SAndreas Dilger 3530bd63f6b0SDarrick J. Wong /* 3531bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3532bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3533bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3534bd63f6b0SDarrick J. Wong * compensate. 3535bd63f6b0SDarrick J. Wong */ 3536bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 353749598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3538bd63f6b0SDarrick J. Wong has_super++; 3539bd63f6b0SDarrick J. Wong 3540617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3541ac27a0ecSDave Kleikamp } 3542ac27a0ecSDave Kleikamp 3543c9de560dSAlex Tomas /** 3544c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3545c9de560dSAlex Tomas * @sbi: In memory super block info 3546c9de560dSAlex Tomas * 3547c9de560dSAlex Tomas * If we have specified it via mount option, then 3548c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3549c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3550c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3551c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3552c9de560dSAlex Tomas * 3553c9de560dSAlex Tomas */ 3554c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3555c9de560dSAlex Tomas { 3556c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3557c9de560dSAlex Tomas unsigned long stripe_width = 3558c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35593eb08658SDan Ehrenberg int ret; 3560c9de560dSAlex Tomas 3561c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35623eb08658SDan Ehrenberg ret = sbi->s_stripe; 35635469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35643eb08658SDan Ehrenberg ret = stripe_width; 35655469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35663eb08658SDan Ehrenberg ret = stride; 35673eb08658SDan Ehrenberg else 35683eb08658SDan Ehrenberg ret = 0; 3569c9de560dSAlex Tomas 35703eb08658SDan Ehrenberg /* 35713eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35723eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35733eb08658SDan Ehrenberg */ 35743eb08658SDan Ehrenberg if (ret <= 1) 35753eb08658SDan Ehrenberg ret = 0; 3576c9de560dSAlex Tomas 35773eb08658SDan Ehrenberg return ret; 3578c9de560dSAlex Tomas } 3579ac27a0ecSDave Kleikamp 3580a13fb1a4SEric Sandeen /* 3581a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3582a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3583a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3584a13fb1a4SEric Sandeen * 0 if it cannot be. 3585a13fb1a4SEric Sandeen */ 358625c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3587a13fb1a4SEric Sandeen { 3588e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3589a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3590a13fb1a4SEric Sandeen "Couldn't mount because of " 3591a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3592a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3593a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3594a13fb1a4SEric Sandeen return 0; 3595a13fb1a4SEric Sandeen } 3596a13fb1a4SEric Sandeen 35975298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3598c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3599c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3600c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3601c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3602c83ad55eSGabriel Krisman Bertazi return 0; 3603c83ad55eSGabriel Krisman Bertazi } 3604c83ad55eSGabriel Krisman Bertazi #endif 3605c83ad55eSGabriel Krisman Bertazi 3606a13fb1a4SEric Sandeen if (readonly) 3607a13fb1a4SEric Sandeen return 1; 3608a13fb1a4SEric Sandeen 3609e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36102cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36111751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36122cb5cc8bSDarrick J. Wong return 1; 36132cb5cc8bSDarrick J. Wong } 36142cb5cc8bSDarrick J. Wong 3615a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3616e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3617a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3618a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3619a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3620a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3621a13fb1a4SEric Sandeen return 0; 3622a13fb1a4SEric Sandeen } 3623e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3624bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3625bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3626bab08ab9STheodore Ts'o "extents feature\n"); 3627bab08ab9STheodore Ts'o return 0; 3628bab08ab9STheodore Ts'o } 36297c319d32SAditya Kali 36309db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3631d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3632d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36337c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3634d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3635689c958cSLi Xi return 0; 3636689c958cSLi Xi } 36377c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3638a13fb1a4SEric Sandeen return 1; 3639a13fb1a4SEric Sandeen } 3640a13fb1a4SEric Sandeen 364166e61a9eSTheodore Ts'o /* 364266e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 364366e61a9eSTheodore Ts'o * on the file system 364466e61a9eSTheodore Ts'o */ 3645235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 364666e61a9eSTheodore Ts'o { 3647235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3648235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3649235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 365066e61a9eSTheodore Ts'o 365166e61a9eSTheodore Ts'o if (es->s_error_count) 3652ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3653ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 365466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 365566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36566a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36576a0678a7SArnd Bergmann sb->s_id, 36586a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 365966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 366066e61a9eSTheodore Ts'o es->s_first_error_func, 366166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 366266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3663651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 366466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 366566e61a9eSTheodore Ts'o if (es->s_first_error_block) 3666651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 366766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3668651e1c3bSJoe Perches printk(KERN_CONT "\n"); 366966e61a9eSTheodore Ts'o } 367066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36716a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36726a0678a7SArnd Bergmann sb->s_id, 36736a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 367466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 367566e61a9eSTheodore Ts'o es->s_last_error_func, 367666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 367766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3678651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 367966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 368066e61a9eSTheodore Ts'o if (es->s_last_error_block) 3681651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 368266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3683651e1c3bSJoe Perches printk(KERN_CONT "\n"); 368466e61a9eSTheodore Ts'o } 368566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 368666e61a9eSTheodore Ts'o } 368766e61a9eSTheodore Ts'o 3688bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3689bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3690bfff6873SLukas Czerner { 3691bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36923d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36933d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36943d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36953d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3696bfff6873SLukas Czerner int ret = 0; 369739fec688SShaoying Xu u64 start_time; 3698bfff6873SLukas Czerner 36993d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 37003d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 37013d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 37023d392b26STheodore Ts'o if (prefetch_ios) 37033d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 37043d392b26STheodore Ts'o prefetch_ios); 37053d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 37063d392b26STheodore Ts'o prefetch_ios); 37073d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 37083d392b26STheodore Ts'o ret = 1; 37093d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37103d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37113d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37123d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37133d392b26STheodore Ts'o ret = 0; 37143d392b26STheodore Ts'o } 37153d392b26STheodore Ts'o } 37163d392b26STheodore Ts'o return ret; 37173d392b26STheodore Ts'o } 3718bfff6873SLukas Czerner 37193d392b26STheodore Ts'o for (; group < ngroups; group++) { 3720bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3721bfff6873SLukas Czerner if (!gdp) { 3722bfff6873SLukas Czerner ret = 1; 3723bfff6873SLukas Czerner break; 3724bfff6873SLukas Czerner } 3725bfff6873SLukas Czerner 3726bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3727bfff6873SLukas Czerner break; 3728bfff6873SLukas Czerner } 3729bfff6873SLukas Czerner 37307f511862STheodore Ts'o if (group >= ngroups) 3731bfff6873SLukas Czerner ret = 1; 3732bfff6873SLukas Czerner 3733bfff6873SLukas Czerner if (!ret) { 373439fec688SShaoying Xu start_time = ktime_get_real_ns(); 3735bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3736bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37373d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3738bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 373939fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 374039fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3741bfff6873SLukas Czerner } 3742bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3743bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3744bfff6873SLukas Czerner } 3745bfff6873SLukas Czerner return ret; 3746bfff6873SLukas Czerner } 3747bfff6873SLukas Czerner 3748bfff6873SLukas Czerner /* 3749bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37504ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3751bfff6873SLukas Czerner */ 3752bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3753bfff6873SLukas Czerner { 3754bfff6873SLukas Czerner if (!elr) 3755bfff6873SLukas Czerner return; 3756bfff6873SLukas Czerner 3757bfff6873SLukas Czerner list_del(&elr->lr_request); 37583d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3759bfff6873SLukas Czerner kfree(elr); 3760bfff6873SLukas Czerner } 3761bfff6873SLukas Czerner 3762bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3763bfff6873SLukas Czerner { 37641bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37651bb933fbSLukas Czerner if (!ext4_li_info) { 37661bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3767bfff6873SLukas Czerner return; 37681bb933fbSLukas Czerner } 3769bfff6873SLukas Czerner 3770bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37711bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3772bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37731bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3774bfff6873SLukas Czerner } 3775bfff6873SLukas Czerner 37768f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37778f1f7453SEric Sandeen 3778bfff6873SLukas Czerner /* 3779bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3780bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3781bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3782bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3783bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3784bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3785bfff6873SLukas Czerner * next waking time and put itself into sleep. 3786bfff6873SLukas Czerner */ 3787bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3788bfff6873SLukas Czerner { 3789c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3790bfff6873SLukas Czerner struct list_head *pos, *n; 3791bfff6873SLukas Czerner struct ext4_li_request *elr; 37924ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3793bfff6873SLukas Czerner 3794bfff6873SLukas Czerner BUG_ON(NULL == eli); 37953b575495SLalith Rajendran set_freezable(); 3796bfff6873SLukas Czerner 3797bfff6873SLukas Czerner cont_thread: 3798bfff6873SLukas Czerner while (true) { 3799bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3800bfff6873SLukas Czerner 3801bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3802bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3803bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3804bfff6873SLukas Czerner goto exit_thread; 3805bfff6873SLukas Czerner } 3806bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3807e22834f0SDmitry Monakhov int err = 0; 3808e22834f0SDmitry Monakhov int progress = 0; 3809bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3810bfff6873SLukas Czerner lr_request); 3811bfff6873SLukas Czerner 3812e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3813e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3814e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3815e22834f0SDmitry Monakhov continue; 3816e22834f0SDmitry Monakhov } 3817e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3818e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3819e22834f0SDmitry Monakhov progress = 1; 3820e22834f0SDmitry Monakhov /* 3821e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3822e22834f0SDmitry Monakhov * be removed from the list, it is 3823e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3824e22834f0SDmitry Monakhov */ 3825e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3826e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3827e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3828e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3829e22834f0SDmitry Monakhov n = pos->next; 3830e22834f0SDmitry Monakhov } 3831e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3832e22834f0SDmitry Monakhov } 3833b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3834e22834f0SDmitry Monakhov if (err) { 3835bfff6873SLukas Czerner ext4_remove_li_request(elr); 3836bfff6873SLukas Czerner continue; 3837bfff6873SLukas Czerner } 3838e22834f0SDmitry Monakhov if (!progress) { 3839e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 38408032bf12SJason A. Donenfeld get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3841b2c78cd0STheodore Ts'o } 3842bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3843bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3844bfff6873SLukas Czerner } 3845bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3846bfff6873SLukas Czerner 3847a0acae0eSTejun Heo try_to_freeze(); 3848bfff6873SLukas Czerner 38494ed5c033SLukas Czerner cur = jiffies; 38504ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3851f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3852bfff6873SLukas Czerner cond_resched(); 3853bfff6873SLukas Czerner continue; 3854bfff6873SLukas Czerner } 3855bfff6873SLukas Czerner 38564ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38574ed5c033SLukas Czerner 38588f1f7453SEric Sandeen if (kthread_should_stop()) { 38598f1f7453SEric Sandeen ext4_clear_request_list(); 38608f1f7453SEric Sandeen goto exit_thread; 38618f1f7453SEric Sandeen } 3862bfff6873SLukas Czerner } 3863bfff6873SLukas Czerner 3864bfff6873SLukas Czerner exit_thread: 3865bfff6873SLukas Czerner /* 3866bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3867bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3868bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3869bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3870bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3871bfff6873SLukas Czerner * new one. 3872bfff6873SLukas Czerner */ 3873bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3874bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3875bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3876bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3877bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3878bfff6873SLukas Czerner goto cont_thread; 3879bfff6873SLukas Czerner } 3880bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3881bfff6873SLukas Czerner kfree(ext4_li_info); 3882bfff6873SLukas Czerner ext4_li_info = NULL; 3883bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3884bfff6873SLukas Czerner 3885bfff6873SLukas Czerner return 0; 3886bfff6873SLukas Czerner } 3887bfff6873SLukas Czerner 3888bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3889bfff6873SLukas Czerner { 3890bfff6873SLukas Czerner struct list_head *pos, *n; 3891bfff6873SLukas Czerner struct ext4_li_request *elr; 3892bfff6873SLukas Czerner 3893bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3894bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3895bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3896bfff6873SLukas Czerner lr_request); 3897bfff6873SLukas Czerner ext4_remove_li_request(elr); 3898bfff6873SLukas Czerner } 3899bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3900bfff6873SLukas Czerner } 3901bfff6873SLukas Czerner 3902bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3903bfff6873SLukas Czerner { 39048f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 39058f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 39068f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 39078f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3908bfff6873SLukas Czerner ext4_clear_request_list(); 3909bfff6873SLukas Czerner kfree(ext4_li_info); 3910bfff6873SLukas Czerner ext4_li_info = NULL; 391192b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3912bfff6873SLukas Czerner "initialization thread\n", 3913bfff6873SLukas Czerner err); 3914bfff6873SLukas Czerner return err; 3915bfff6873SLukas Czerner } 3916bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3917bfff6873SLukas Czerner return 0; 3918bfff6873SLukas Czerner } 3919bfff6873SLukas Czerner 3920bfff6873SLukas Czerner /* 3921bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3922bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3923bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3924bfff6873SLukas Czerner * groups and return total number of groups. 3925bfff6873SLukas Czerner */ 3926bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3927bfff6873SLukas Czerner { 3928bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3929bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3930bfff6873SLukas Czerner 39318844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39328844618dSTheodore Ts'o return ngroups; 39338844618dSTheodore Ts'o 3934bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3935bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3936bfff6873SLukas Czerner if (!gdp) 3937bfff6873SLukas Czerner continue; 3938bfff6873SLukas Czerner 393950122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3940bfff6873SLukas Czerner break; 3941bfff6873SLukas Czerner } 3942bfff6873SLukas Czerner 3943bfff6873SLukas Czerner return group; 3944bfff6873SLukas Czerner } 3945bfff6873SLukas Czerner 3946bfff6873SLukas Czerner static int ext4_li_info_new(void) 3947bfff6873SLukas Czerner { 3948bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3949bfff6873SLukas Czerner 3950bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3951bfff6873SLukas Czerner if (!eli) 3952bfff6873SLukas Czerner return -ENOMEM; 3953bfff6873SLukas Czerner 3954bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3955bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3956bfff6873SLukas Czerner 3957bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3958bfff6873SLukas Czerner 3959bfff6873SLukas Czerner ext4_li_info = eli; 3960bfff6873SLukas Czerner 3961bfff6873SLukas Czerner return 0; 3962bfff6873SLukas Czerner } 3963bfff6873SLukas Czerner 3964bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3965bfff6873SLukas Czerner ext4_group_t start) 3966bfff6873SLukas Czerner { 3967bfff6873SLukas Czerner struct ext4_li_request *elr; 3968bfff6873SLukas Czerner 3969bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3970bfff6873SLukas Czerner if (!elr) 3971bfff6873SLukas Czerner return NULL; 3972bfff6873SLukas Czerner 3973bfff6873SLukas Czerner elr->lr_super = sb; 39743d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 397521175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39763d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3977bfff6873SLukas Czerner elr->lr_next_group = start; 397821175ca4SHarshad Shirwadkar } else { 397921175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39803d392b26STheodore Ts'o } 3981bfff6873SLukas Czerner 3982bfff6873SLukas Czerner /* 3983bfff6873SLukas Czerner * Randomize first schedule time of the request to 3984bfff6873SLukas Czerner * spread the inode table initialization requests 3985bfff6873SLukas Czerner * better. 3986bfff6873SLukas Czerner */ 39878032bf12SJason A. Donenfeld elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3988bfff6873SLukas Czerner return elr; 3989bfff6873SLukas Czerner } 3990bfff6873SLukas Czerner 39917f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3992bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3993bfff6873SLukas Czerner { 3994bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39957f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 399649598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39976c5a6cb9SAndrew Morton int ret = 0; 3998bfff6873SLukas Czerner 39997f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 400051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 400151ce6511SLukas Czerner /* 400251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 400351ce6511SLukas Czerner * s_li_wait_mult might have changed. 400451ce6511SLukas Czerner */ 400551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 40067f511862STheodore Ts'o goto out; 400751ce6511SLukas Czerner } 4008bfff6873SLukas Czerner 4009426d15adSJosh Triplett if (sb_rdonly(sb) || 4010426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 4011426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 40127f511862STheodore Ts'o goto out; 4013bfff6873SLukas Czerner 4014bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40157f511862STheodore Ts'o if (!elr) { 40167f511862STheodore Ts'o ret = -ENOMEM; 40177f511862STheodore Ts'o goto out; 40187f511862STheodore Ts'o } 4019bfff6873SLukas Czerner 4020bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4021bfff6873SLukas Czerner ret = ext4_li_info_new(); 4022bfff6873SLukas Czerner if (ret) 4023bfff6873SLukas Czerner goto out; 4024bfff6873SLukas Czerner } 4025bfff6873SLukas Czerner 4026bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4027bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4028bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4029bfff6873SLukas Czerner 4030bfff6873SLukas Czerner sbi->s_li_request = elr; 403146e4690bSTao Ma /* 403246e4690bSTao Ma * set elr to NULL here since it has been inserted to 403346e4690bSTao Ma * the request_list and the removal and free of it is 403446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 403546e4690bSTao Ma */ 403646e4690bSTao Ma elr = NULL; 4037bfff6873SLukas Czerner 4038bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4039bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4040bfff6873SLukas Czerner if (ret) 4041bfff6873SLukas Czerner goto out; 4042bfff6873SLukas Czerner } 4043bfff6873SLukas Czerner out: 4044bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4045beed5ecbSNicolas Kaiser if (ret) 4046bfff6873SLukas Czerner kfree(elr); 4047bfff6873SLukas Czerner return ret; 4048bfff6873SLukas Czerner } 4049bfff6873SLukas Czerner 4050bfff6873SLukas Czerner /* 4051bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4052bfff6873SLukas Czerner * module unload. 4053bfff6873SLukas Czerner */ 4054bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4055bfff6873SLukas Czerner { 4056bfff6873SLukas Czerner /* 4057bfff6873SLukas Czerner * If thread exited earlier 4058bfff6873SLukas Czerner * there's nothing to be done. 4059bfff6873SLukas Czerner */ 40608f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4061bfff6873SLukas Czerner return; 4062bfff6873SLukas Czerner 40638f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4064bfff6873SLukas Czerner } 4065bfff6873SLukas Czerner 406625ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 406725ed6e8aSDarrick J. Wong { 406825ed6e8aSDarrick J. Wong int ret = 1; 406925ed6e8aSDarrick J. Wong int compat, incompat; 407025ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 407125ed6e8aSDarrick J. Wong 40729aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4073db9ee220SDarrick J. Wong /* journal checksum v3 */ 407425ed6e8aSDarrick J. Wong compat = 0; 4075db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 407625ed6e8aSDarrick J. Wong } else { 407725ed6e8aSDarrick J. Wong /* journal checksum v1 */ 407825ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 407925ed6e8aSDarrick J. Wong incompat = 0; 408025ed6e8aSDarrick J. Wong } 408125ed6e8aSDarrick J. Wong 4082feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4083feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4084feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4085feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 408625ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 408725ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 408825ed6e8aSDarrick J. Wong compat, 0, 408925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 409025ed6e8aSDarrick J. Wong incompat); 409125ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 409225ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 409325ed6e8aSDarrick J. Wong compat, 0, 409425ed6e8aSDarrick J. Wong incompat); 409525ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 409625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 409725ed6e8aSDarrick J. Wong } else { 4098feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4099feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 410025ed6e8aSDarrick J. Wong } 410125ed6e8aSDarrick J. Wong 410225ed6e8aSDarrick J. Wong return ret; 410325ed6e8aSDarrick J. Wong } 410425ed6e8aSDarrick J. Wong 4105952fc18eSTheodore Ts'o /* 4106952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4107952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4108952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4109952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4110952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4111952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4112952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4113952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4114952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4115952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4116952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4117952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4118952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4119952fc18eSTheodore Ts'o */ 4120952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4121952fc18eSTheodore Ts'o char *buf) 4122952fc18eSTheodore Ts'o { 4123952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4124952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4125952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4126952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4127952fc18eSTheodore Ts'o int s, j, count = 0; 412810b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4129952fc18eSTheodore Ts'o 4130e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 413110b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 413210b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41330548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41340548bbb8STheodore Ts'o 4135952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4136952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4137952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4138952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4139952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4140952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4141952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4142952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4143952fc18eSTheodore Ts'o count++; 4144952fc18eSTheodore Ts'o } 4145952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4146952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4147952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4148952fc18eSTheodore Ts'o count++; 4149952fc18eSTheodore Ts'o } 4150952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4151952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4152952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4153952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4154952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4155952fc18eSTheodore Ts'o count++; 4156952fc18eSTheodore Ts'o } 4157952fc18eSTheodore Ts'o if (i != grp) 4158952fc18eSTheodore Ts'o continue; 4159952fc18eSTheodore Ts'o s = 0; 4160952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4161952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4162952fc18eSTheodore Ts'o count++; 4163952fc18eSTheodore Ts'o } 4164c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4165c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4166c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4167c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4168c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4169952fc18eSTheodore Ts'o } 4170c48ae41bSTheodore Ts'o count += j; 4171c48ae41bSTheodore Ts'o for (; j > 0; j--) 4172c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4173952fc18eSTheodore Ts'o } 4174952fc18eSTheodore Ts'o if (!count) 4175952fc18eSTheodore Ts'o return 0; 4176952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4177952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4178952fc18eSTheodore Ts'o } 4179952fc18eSTheodore Ts'o 4180952fc18eSTheodore Ts'o /* 4181952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4182952fc18eSTheodore Ts'o */ 4183952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4184952fc18eSTheodore Ts'o { 4185952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4186952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41873c816dedSEric Whitney struct inode *j_inode; 41883c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4189952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4190952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41914fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4192952fc18eSTheodore Ts'o 4193952fc18eSTheodore Ts'o if (!buf) 4194952fc18eSTheodore Ts'o return -ENOMEM; 4195952fc18eSTheodore Ts'o 4196952fc18eSTheodore Ts'o /* 4197952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4198952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4199952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4200952fc18eSTheodore Ts'o */ 4201952fc18eSTheodore Ts'o 4202952fc18eSTheodore Ts'o /* 4203952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4204952fc18eSTheodore Ts'o */ 4205952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4206952fc18eSTheodore Ts'o 4207952fc18eSTheodore Ts'o /* 4208952fc18eSTheodore Ts'o * Add the overhead found in each block group 4209952fc18eSTheodore Ts'o */ 4210952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4211952fc18eSTheodore Ts'o int blks; 4212952fc18eSTheodore Ts'o 4213952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4214952fc18eSTheodore Ts'o overhead += blks; 4215952fc18eSTheodore Ts'o if (blks) 4216952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4217952fc18eSTheodore Ts'o cond_resched(); 4218952fc18eSTheodore Ts'o } 42193c816dedSEric Whitney 42203c816dedSEric Whitney /* 42213c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42223c816dedSEric Whitney * loaded or not 42233c816dedSEric Whitney */ 4224ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4225ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4226f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4227f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42283c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42293c816dedSEric Whitney if (j_inode) { 42303c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42313c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42323c816dedSEric Whitney iput(j_inode); 42333c816dedSEric Whitney } else { 42343c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42353c816dedSEric Whitney } 42363c816dedSEric Whitney } 4237952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4238952fc18eSTheodore Ts'o smp_wmb(); 4239952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4240952fc18eSTheodore Ts'o return 0; 4241952fc18eSTheodore Ts'o } 4242952fc18eSTheodore Ts'o 4243b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 424427dd4385SLukas Czerner { 424527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4246b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 424727dd4385SLukas Czerner 424827dd4385SLukas Czerner /* 424930fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 425030fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 425130fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 425230fac0f7SJan Kara * to keep ext2/3 backward compatibility. 425330fac0f7SJan Kara */ 4254e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4255b5799018STheodore Ts'o return; 425630fac0f7SJan Kara /* 425727dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 425827dd4385SLukas Czerner * This should cover the situations where we can not afford to run 425927dd4385SLukas Czerner * out of space like for example punch hole, or converting 4260556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 426127dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 426227dd4385SLukas Czerner * very rare. 426327dd4385SLukas Czerner */ 4264b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4265b5799018STheodore Ts'o sbi->s_cluster_bits); 426627dd4385SLukas Czerner 426727dd4385SLukas Czerner do_div(resv_clusters, 50); 426827dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 426927dd4385SLukas Czerner 4270b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 427127dd4385SLukas Czerner } 427227dd4385SLukas Czerner 4273ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4274ca9b404fSRoman Anufriev { 4275ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4276ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4277ca9b404fSRoman Anufriev return "none"; 4278ca9b404fSRoman Anufriev 4279ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4280ca9b404fSRoman Anufriev return "journalled"; 4281ca9b404fSRoman Anufriev else 4282ca9b404fSRoman Anufriev return "writeback"; 4283ca9b404fSRoman Anufriev #else 4284ca9b404fSRoman Anufriev return "disabled"; 4285ca9b404fSRoman Anufriev #endif 4286ca9b404fSRoman Anufriev } 4287ca9b404fSRoman Anufriev 4288188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4289188c299eSJan Kara enum ext4_journal_trigger_type type, 4290188c299eSJan Kara void (*trigger)( 4291188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4292188c299eSJan Kara struct buffer_head *bh, 4293188c299eSJan Kara void *mapped_data, 4294188c299eSJan Kara size_t size)) 4295188c299eSJan Kara { 4296188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4297188c299eSJan Kara 4298188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4299188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4300188c299eSJan Kara } 4301188c299eSJan Kara 43027edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4303ac27a0ecSDave Kleikamp { 43047edfd85bSLukas Czerner if (!sbi) 43057edfd85bSLukas Czerner return; 43067edfd85bSLukas Czerner 43077edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 43088012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43097edfd85bSLukas Czerner kfree(sbi); 43107edfd85bSLukas Czerner } 43117edfd85bSLukas Czerner 43127edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43137edfd85bSLukas Czerner { 43147edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43157edfd85bSLukas Czerner 43167edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43177edfd85bSLukas Czerner if (!sbi) 43187edfd85bSLukas Czerner return NULL; 43197edfd85bSLukas Czerner 43208012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 43218012b866SShiyang Ruan NULL, NULL); 43227edfd85bSLukas Czerner 43237edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43247edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43257edfd85bSLukas Czerner 43267edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43277edfd85bSLukas Czerner goto err_out; 43287edfd85bSLukas Czerner 43297edfd85bSLukas Czerner sb->s_fs_info = sbi; 43307edfd85bSLukas Czerner sbi->s_sb = sb; 43317edfd85bSLukas Czerner return sbi; 43327edfd85bSLukas Czerner err_out: 43338012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43347edfd85bSLukas Czerner kfree(sbi); 43357edfd85bSLukas Czerner return NULL; 43367edfd85bSLukas Czerner } 43377edfd85bSLukas Czerner 43385f6d662dSJason Yan static void ext4_set_def_opts(struct super_block *sb, 43395f6d662dSJason Yan struct ext4_super_block *es) 43405f6d662dSJason Yan { 43415f6d662dSJason Yan unsigned long def_mount_opts; 43425f6d662dSJason Yan 43435f6d662dSJason Yan /* Set defaults before we parse the mount options */ 43445f6d662dSJason Yan def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 43455f6d662dSJason Yan set_opt(sb, INIT_INODE_TABLE); 43465f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DEBUG) 43475f6d662dSJason Yan set_opt(sb, DEBUG); 43485f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 43495f6d662dSJason Yan set_opt(sb, GRPID); 43505f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_UID16) 43515f6d662dSJason Yan set_opt(sb, NO_UID32); 43525f6d662dSJason Yan /* xattr user namespace & acls are now defaulted on */ 43535f6d662dSJason Yan set_opt(sb, XATTR_USER); 43545f6d662dSJason Yan #ifdef CONFIG_EXT4_FS_POSIX_ACL 43555f6d662dSJason Yan set_opt(sb, POSIX_ACL); 43565f6d662dSJason Yan #endif 43575f6d662dSJason Yan if (ext4_has_feature_fast_commit(sb)) 43585f6d662dSJason Yan set_opt2(sb, JOURNAL_FAST_COMMIT); 43595f6d662dSJason Yan /* don't forget to enable journal_csum when metadata_csum is enabled. */ 43605f6d662dSJason Yan if (ext4_has_metadata_csum(sb)) 43615f6d662dSJason Yan set_opt(sb, JOURNAL_CHECKSUM); 43625f6d662dSJason Yan 43635f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 43645f6d662dSJason Yan set_opt(sb, JOURNAL_DATA); 43655f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 43665f6d662dSJason Yan set_opt(sb, ORDERED_DATA); 43675f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 43685f6d662dSJason Yan set_opt(sb, WRITEBACK_DATA); 43695f6d662dSJason Yan 43705f6d662dSJason Yan if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) 43715f6d662dSJason Yan set_opt(sb, ERRORS_PANIC); 43725f6d662dSJason Yan else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) 43735f6d662dSJason Yan set_opt(sb, ERRORS_CONT); 43745f6d662dSJason Yan else 43755f6d662dSJason Yan set_opt(sb, ERRORS_RO); 43765f6d662dSJason Yan /* block_validity enabled by default; disable with noblock_validity */ 43775f6d662dSJason Yan set_opt(sb, BLOCK_VALIDITY); 43785f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DISCARD) 43795f6d662dSJason Yan set_opt(sb, DISCARD); 43805f6d662dSJason Yan 43815f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 43825f6d662dSJason Yan set_opt(sb, BARRIER); 43835f6d662dSJason Yan 43845f6d662dSJason Yan /* 43855f6d662dSJason Yan * enable delayed allocation by default 43865f6d662dSJason Yan * Use -o nodelalloc to turn it off 43875f6d662dSJason Yan */ 43885f6d662dSJason Yan if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 43895f6d662dSJason Yan ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 43905f6d662dSJason Yan set_opt(sb, DELALLOC); 43913df11e27SJason Yan 43923df11e27SJason Yan if (sb->s_blocksize == PAGE_SIZE) 43933df11e27SJason Yan set_opt(sb, DIOREAD_NOLOCK); 43945f6d662dSJason Yan } 43955f6d662dSJason Yan 4396c8267c51SJason Yan static int ext4_handle_clustersize(struct super_block *sb) 43974a8557b0SJason Yan { 43984a8557b0SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 43994a8557b0SJason Yan struct ext4_super_block *es = sbi->s_es; 44004a8557b0SJason Yan int clustersize; 44014a8557b0SJason Yan 44024a8557b0SJason Yan /* Handle clustersize */ 44034a8557b0SJason Yan clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 44044a8557b0SJason Yan if (ext4_has_feature_bigalloc(sb)) { 4405c8267c51SJason Yan if (clustersize < sb->s_blocksize) { 44064a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44074a8557b0SJason Yan "cluster size (%d) smaller than " 4408c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44094a8557b0SJason Yan return -EINVAL; 44104a8557b0SJason Yan } 44114a8557b0SJason Yan sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 44124a8557b0SJason Yan le32_to_cpu(es->s_log_block_size); 44134a8557b0SJason Yan sbi->s_clusters_per_group = 44144a8557b0SJason Yan le32_to_cpu(es->s_clusters_per_group); 4415c8267c51SJason Yan if (sbi->s_clusters_per_group > sb->s_blocksize * 8) { 44164a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44174a8557b0SJason Yan "#clusters per group too big: %lu", 44184a8557b0SJason Yan sbi->s_clusters_per_group); 44194a8557b0SJason Yan return -EINVAL; 44204a8557b0SJason Yan } 44214a8557b0SJason Yan if (sbi->s_blocks_per_group != 4422c8267c51SJason Yan (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) { 44234a8557b0SJason Yan ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 44244a8557b0SJason Yan "clusters per group (%lu) inconsistent", 44254a8557b0SJason Yan sbi->s_blocks_per_group, 44264a8557b0SJason Yan sbi->s_clusters_per_group); 44274a8557b0SJason Yan return -EINVAL; 44284a8557b0SJason Yan } 44294a8557b0SJason Yan } else { 4430c8267c51SJason Yan if (clustersize != sb->s_blocksize) { 44314a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44324a8557b0SJason Yan "fragment/cluster size (%d) != " 4433c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44344a8557b0SJason Yan return -EINVAL; 44354a8557b0SJason Yan } 4436c8267c51SJason Yan if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { 44374a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44384a8557b0SJason Yan "#blocks per group too big: %lu", 44394a8557b0SJason Yan sbi->s_blocks_per_group); 44404a8557b0SJason Yan return -EINVAL; 44414a8557b0SJason Yan } 44424a8557b0SJason Yan sbi->s_clusters_per_group = sbi->s_blocks_per_group; 44434a8557b0SJason Yan sbi->s_cluster_bits = 0; 44444a8557b0SJason Yan } 4445c8267c51SJason Yan sbi->s_cluster_ratio = clustersize / sb->s_blocksize; 44464a8557b0SJason Yan 44474a8557b0SJason Yan /* Do we have standard group size of clustersize * 8 blocks ? */ 44484a8557b0SJason Yan if (sbi->s_blocks_per_group == clustersize << 3) 44494a8557b0SJason Yan set_opt2(sb, STD_GROUP_SIZE); 44504a8557b0SJason Yan 44514a8557b0SJason Yan return 0; 44524a8557b0SJason Yan } 44534a8557b0SJason Yan 4454f7314a67SJason Yan static void ext4_fast_commit_init(struct super_block *sb) 4455f7314a67SJason Yan { 4456f7314a67SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4457f7314a67SJason Yan 4458f7314a67SJason Yan /* Initialize fast commit stuff */ 4459f7314a67SJason Yan atomic_set(&sbi->s_fc_subtid, 0); 4460f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4461f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4462f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4463f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4464f7314a67SJason Yan sbi->s_fc_bytes = 0; 4465f7314a67SJason Yan ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 4466f7314a67SJason Yan sbi->s_fc_ineligible_tid = 0; 4467f7314a67SJason Yan spin_lock_init(&sbi->s_fc_lock); 4468f7314a67SJason Yan memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 4469f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions = NULL; 4470f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_size = 0; 4471f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_used = 0; 4472f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_valid = 0; 4473f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes = NULL; 4474f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 4475f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4476f7314a67SJason Yan } 4477f7314a67SJason Yan 44780e495f7cSJason Yan static int ext4_inode_info_init(struct super_block *sb, 4479c8267c51SJason Yan struct ext4_super_block *es) 44800e495f7cSJason Yan { 44810e495f7cSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44820e495f7cSJason Yan 44830e495f7cSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44840e495f7cSJason Yan sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44850e495f7cSJason Yan sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44860e495f7cSJason Yan } else { 44870e495f7cSJason Yan sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44880e495f7cSJason Yan sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 44890e495f7cSJason Yan if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 44900e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 44910e495f7cSJason Yan sbi->s_first_ino); 44920e495f7cSJason Yan return -EINVAL; 44930e495f7cSJason Yan } 44940e495f7cSJason Yan if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 44950e495f7cSJason Yan (!is_power_of_2(sbi->s_inode_size)) || 4496c8267c51SJason Yan (sbi->s_inode_size > sb->s_blocksize)) { 44970e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44980e495f7cSJason Yan "unsupported inode size: %d", 44990e495f7cSJason Yan sbi->s_inode_size); 4500c8267c51SJason Yan ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize); 45010e495f7cSJason Yan return -EINVAL; 45020e495f7cSJason Yan } 45030e495f7cSJason Yan /* 45040e495f7cSJason Yan * i_atime_extra is the last extra field available for 45050e495f7cSJason Yan * [acm]times in struct ext4_inode. Checking for that 45060e495f7cSJason Yan * field should suffice to ensure we have extra space 45070e495f7cSJason Yan * for all three. 45080e495f7cSJason Yan */ 45090e495f7cSJason Yan if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45100e495f7cSJason Yan sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45110e495f7cSJason Yan sb->s_time_gran = 1; 45120e495f7cSJason Yan sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45130e495f7cSJason Yan } else { 45140e495f7cSJason Yan sb->s_time_gran = NSEC_PER_SEC; 45150e495f7cSJason Yan sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45160e495f7cSJason Yan } 45170e495f7cSJason Yan sb->s_time_min = EXT4_TIMESTAMP_MIN; 45180e495f7cSJason Yan } 45190e495f7cSJason Yan 45200e495f7cSJason Yan if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45210e495f7cSJason Yan sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45220e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE; 45230e495f7cSJason Yan if (ext4_has_feature_extra_isize(sb)) { 45240e495f7cSJason Yan unsigned v, max = (sbi->s_inode_size - 45250e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE); 45260e495f7cSJason Yan 45270e495f7cSJason Yan v = le16_to_cpu(es->s_want_extra_isize); 45280e495f7cSJason Yan if (v > max) { 45290e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45300e495f7cSJason Yan "bad s_want_extra_isize: %d", v); 45310e495f7cSJason Yan return -EINVAL; 45320e495f7cSJason Yan } 45330e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45340e495f7cSJason Yan sbi->s_want_extra_isize = v; 45350e495f7cSJason Yan 45360e495f7cSJason Yan v = le16_to_cpu(es->s_min_extra_isize); 45370e495f7cSJason Yan if (v > max) { 45380e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45390e495f7cSJason Yan "bad s_min_extra_isize: %d", v); 45400e495f7cSJason Yan return -EINVAL; 45410e495f7cSJason Yan } 45420e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45430e495f7cSJason Yan sbi->s_want_extra_isize = v; 45440e495f7cSJason Yan } 45450e495f7cSJason Yan } 45460e495f7cSJason Yan 45470e495f7cSJason Yan return 0; 45480e495f7cSJason Yan } 45490e495f7cSJason Yan 455039c135b0SJason Yan #if IS_ENABLED(CONFIG_UNICODE) 455139c135b0SJason Yan static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 455239c135b0SJason Yan { 455339c135b0SJason Yan const struct ext4_sb_encodings *encoding_info; 455439c135b0SJason Yan struct unicode_map *encoding; 455539c135b0SJason Yan __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 455639c135b0SJason Yan 455739c135b0SJason Yan if (!ext4_has_feature_casefold(sb) || sb->s_encoding) 455839c135b0SJason Yan return 0; 455939c135b0SJason Yan 456039c135b0SJason Yan encoding_info = ext4_sb_read_encoding(es); 456139c135b0SJason Yan if (!encoding_info) { 456239c135b0SJason Yan ext4_msg(sb, KERN_ERR, 456339c135b0SJason Yan "Encoding requested by superblock is unknown"); 456439c135b0SJason Yan return -EINVAL; 456539c135b0SJason Yan } 456639c135b0SJason Yan 456739c135b0SJason Yan encoding = utf8_load(encoding_info->version); 456839c135b0SJason Yan if (IS_ERR(encoding)) { 456939c135b0SJason Yan ext4_msg(sb, KERN_ERR, 457039c135b0SJason Yan "can't mount with superblock charset: %s-%u.%u.%u " 457139c135b0SJason Yan "not supported by the kernel. flags: 0x%x.", 457239c135b0SJason Yan encoding_info->name, 457339c135b0SJason Yan unicode_major(encoding_info->version), 457439c135b0SJason Yan unicode_minor(encoding_info->version), 457539c135b0SJason Yan unicode_rev(encoding_info->version), 457639c135b0SJason Yan encoding_flags); 457739c135b0SJason Yan return -EINVAL; 457839c135b0SJason Yan } 457939c135b0SJason Yan ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 458039c135b0SJason Yan "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 458139c135b0SJason Yan unicode_major(encoding_info->version), 458239c135b0SJason Yan unicode_minor(encoding_info->version), 458339c135b0SJason Yan unicode_rev(encoding_info->version), 458439c135b0SJason Yan encoding_flags); 458539c135b0SJason Yan 458639c135b0SJason Yan sb->s_encoding = encoding; 458739c135b0SJason Yan sb->s_encoding_flags = encoding_flags; 458839c135b0SJason Yan 458939c135b0SJason Yan return 0; 459039c135b0SJason Yan } 459139c135b0SJason Yan #else 459239c135b0SJason Yan static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 459339c135b0SJason Yan { 459439c135b0SJason Yan return 0; 459539c135b0SJason Yan } 459639c135b0SJason Yan #endif 459739c135b0SJason Yan 4598b26458d1SJason Yan static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) 4599b26458d1SJason Yan { 4600b26458d1SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4601b26458d1SJason Yan 4602b26458d1SJason Yan /* Warn if metadata_csum and gdt_csum are both set. */ 4603b26458d1SJason Yan if (ext4_has_feature_metadata_csum(sb) && 4604b26458d1SJason Yan ext4_has_feature_gdt_csum(sb)) 4605b26458d1SJason Yan ext4_warning(sb, "metadata_csum and uninit_bg are " 4606b26458d1SJason Yan "redundant flags; please run fsck."); 4607b26458d1SJason Yan 4608b26458d1SJason Yan /* Check for a known checksum algorithm */ 4609b26458d1SJason Yan if (!ext4_verify_csum_type(sb, es)) { 4610b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4611b26458d1SJason Yan "unknown checksum algorithm."); 4612b26458d1SJason Yan return -EINVAL; 4613b26458d1SJason Yan } 4614b26458d1SJason Yan ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 4615b26458d1SJason Yan ext4_orphan_file_block_trigger); 4616b26458d1SJason Yan 4617b26458d1SJason Yan /* Load the checksum driver */ 4618b26458d1SJason Yan sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 4619b26458d1SJason Yan if (IS_ERR(sbi->s_chksum_driver)) { 4620b26458d1SJason Yan int ret = PTR_ERR(sbi->s_chksum_driver); 4621b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 4622b26458d1SJason Yan sbi->s_chksum_driver = NULL; 4623b26458d1SJason Yan return ret; 4624b26458d1SJason Yan } 4625b26458d1SJason Yan 4626b26458d1SJason Yan /* Check superblock checksum */ 4627b26458d1SJason Yan if (!ext4_superblock_csum_verify(sb, es)) { 4628b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4629b26458d1SJason Yan "invalid superblock checksum. Run e2fsck?"); 4630b26458d1SJason Yan return -EFSBADCRC; 4631b26458d1SJason Yan } 4632b26458d1SJason Yan 4633b26458d1SJason Yan /* Precompute checksum seed for all metadata */ 4634b26458d1SJason Yan if (ext4_has_feature_csum_seed(sb)) 4635b26458d1SJason Yan sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4636b26458d1SJason Yan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4637b26458d1SJason Yan sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4638b26458d1SJason Yan sizeof(es->s_uuid)); 4639b26458d1SJason Yan return 0; 4640b26458d1SJason Yan } 4641b26458d1SJason Yan 4642d7f3542bSJason Yan static int ext4_check_feature_compatibility(struct super_block *sb, 4643d7f3542bSJason Yan struct ext4_super_block *es, 4644d7f3542bSJason Yan int silent) 4645d7f3542bSJason Yan { 464654902099SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 464754902099SJason Yan 4648d7f3542bSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4649d7f3542bSJason Yan (ext4_has_compat_features(sb) || 4650d7f3542bSJason Yan ext4_has_ro_compat_features(sb) || 4651d7f3542bSJason Yan ext4_has_incompat_features(sb))) 4652d7f3542bSJason Yan ext4_msg(sb, KERN_WARNING, 4653d7f3542bSJason Yan "feature flags set on rev 0 fs, " 4654d7f3542bSJason Yan "running e2fsck is recommended"); 4655d7f3542bSJason Yan 4656d7f3542bSJason Yan if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4657d7f3542bSJason Yan set_opt2(sb, HURD_COMPAT); 4658d7f3542bSJason Yan if (ext4_has_feature_64bit(sb)) { 4659d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4660d7f3542bSJason Yan "The Hurd can't support 64-bit file systems"); 4661d7f3542bSJason Yan return -EINVAL; 4662d7f3542bSJason Yan } 4663d7f3542bSJason Yan 4664d7f3542bSJason Yan /* 4665d7f3542bSJason Yan * ea_inode feature uses l_i_version field which is not 4666d7f3542bSJason Yan * available in HURD_COMPAT mode. 4667d7f3542bSJason Yan */ 4668d7f3542bSJason Yan if (ext4_has_feature_ea_inode(sb)) { 4669d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4670d7f3542bSJason Yan "ea_inode feature is not supported for Hurd"); 4671d7f3542bSJason Yan return -EINVAL; 4672d7f3542bSJason Yan } 4673d7f3542bSJason Yan } 4674d7f3542bSJason Yan 4675d7f3542bSJason Yan if (IS_EXT2_SB(sb)) { 4676d7f3542bSJason Yan if (ext2_feature_set_ok(sb)) 4677d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 4678d7f3542bSJason Yan "using the ext4 subsystem"); 4679d7f3542bSJason Yan else { 4680d7f3542bSJason Yan /* 4681d7f3542bSJason Yan * If we're probing be silent, if this looks like 4682d7f3542bSJason Yan * it's actually an ext[34] filesystem. 4683d7f3542bSJason Yan */ 4684d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4685d7f3542bSJason Yan return -EINVAL; 4686d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 4687d7f3542bSJason Yan "to feature incompatibilities"); 4688d7f3542bSJason Yan return -EINVAL; 4689d7f3542bSJason Yan } 4690d7f3542bSJason Yan } 4691d7f3542bSJason Yan 4692d7f3542bSJason Yan if (IS_EXT3_SB(sb)) { 4693d7f3542bSJason Yan if (ext3_feature_set_ok(sb)) 4694d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 4695d7f3542bSJason Yan "using the ext4 subsystem"); 4696d7f3542bSJason Yan else { 4697d7f3542bSJason Yan /* 4698d7f3542bSJason Yan * If we're probing be silent, if this looks like 4699d7f3542bSJason Yan * it's actually an ext4 filesystem. 4700d7f3542bSJason Yan */ 4701d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4702d7f3542bSJason Yan return -EINVAL; 4703d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 4704d7f3542bSJason Yan "to feature incompatibilities"); 4705d7f3542bSJason Yan return -EINVAL; 4706d7f3542bSJason Yan } 4707d7f3542bSJason Yan } 4708d7f3542bSJason Yan 4709d7f3542bSJason Yan /* 4710d7f3542bSJason Yan * Check feature flags regardless of the revision level, since we 4711d7f3542bSJason Yan * previously didn't change the revision level when setting the flags, 4712d7f3542bSJason Yan * so there is a chance incompat flags are set on a rev 0 filesystem. 4713d7f3542bSJason Yan */ 4714d7f3542bSJason Yan if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4715d7f3542bSJason Yan return -EINVAL; 4716d7f3542bSJason Yan 471754902099SJason Yan if (sbi->s_daxdev) { 471854902099SJason Yan if (sb->s_blocksize == PAGE_SIZE) 471954902099SJason Yan set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 472054902099SJason Yan else 472154902099SJason Yan ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 472254902099SJason Yan } 472354902099SJason Yan 472454902099SJason Yan if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 472554902099SJason Yan if (ext4_has_feature_inline_data(sb)) { 472654902099SJason Yan ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 472754902099SJason Yan " that may contain inline data"); 472854902099SJason Yan return -EINVAL; 472954902099SJason Yan } 473054902099SJason Yan if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 473154902099SJason Yan ext4_msg(sb, KERN_ERR, 473254902099SJason Yan "DAX unsupported by block device."); 473354902099SJason Yan return -EINVAL; 473454902099SJason Yan } 473554902099SJason Yan } 473654902099SJason Yan 473754902099SJason Yan if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 473854902099SJason Yan ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 473954902099SJason Yan es->s_encryption_level); 474054902099SJason Yan return -EINVAL; 474154902099SJason Yan } 474254902099SJason Yan 4743d7f3542bSJason Yan return 0; 4744d7f3542bSJason Yan } 4745d7f3542bSJason Yan 474668e62439SJason Yan static int ext4_check_geometry(struct super_block *sb, 4747bc62dbf9SJason Yan struct ext4_super_block *es) 4748bc62dbf9SJason Yan { 4749bc62dbf9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4750bc62dbf9SJason Yan __u64 blocks_count; 4751269e9226SJason Yan int err; 4752269e9226SJason Yan 4753269e9226SJason Yan if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) { 4754269e9226SJason Yan ext4_msg(sb, KERN_ERR, 4755269e9226SJason Yan "Number of reserved GDT blocks insanely large: %d", 4756269e9226SJason Yan le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 4757269e9226SJason Yan return -EINVAL; 4758269e9226SJason Yan } 4759269e9226SJason Yan /* 4760269e9226SJason Yan * Test whether we have more sectors than will fit in sector_t, 4761269e9226SJason Yan * and whether the max offset is addressable by the page cache. 4762269e9226SJason Yan */ 4763269e9226SJason Yan err = generic_check_addressable(sb->s_blocksize_bits, 4764269e9226SJason Yan ext4_blocks_count(es)); 4765269e9226SJason Yan if (err) { 4766269e9226SJason Yan ext4_msg(sb, KERN_ERR, "filesystem" 4767269e9226SJason Yan " too large to mount safely on this system"); 4768269e9226SJason Yan return err; 4769269e9226SJason Yan } 4770bc62dbf9SJason Yan 4771bc62dbf9SJason Yan /* check blocks count against device size */ 4772bc62dbf9SJason Yan blocks_count = sb_bdev_nr_blocks(sb); 4773bc62dbf9SJason Yan if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4774bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4775bc62dbf9SJason Yan "exceeds size of device (%llu blocks)", 4776bc62dbf9SJason Yan ext4_blocks_count(es), blocks_count); 4777bc62dbf9SJason Yan return -EINVAL; 4778bc62dbf9SJason Yan } 4779bc62dbf9SJason Yan 4780bc62dbf9SJason Yan /* 4781bc62dbf9SJason Yan * It makes no sense for the first data block to be beyond the end 4782bc62dbf9SJason Yan * of the filesystem. 4783bc62dbf9SJason Yan */ 4784bc62dbf9SJason Yan if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4785bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4786bc62dbf9SJason Yan "block %u is beyond end of filesystem (%llu)", 4787bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4788bc62dbf9SJason Yan ext4_blocks_count(es)); 4789bc62dbf9SJason Yan return -EINVAL; 4790bc62dbf9SJason Yan } 4791bc62dbf9SJason Yan if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4792bc62dbf9SJason Yan (sbi->s_cluster_ratio == 1)) { 4793bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4794bc62dbf9SJason Yan "block is 0 with a 1k block and cluster size"); 4795bc62dbf9SJason Yan return -EINVAL; 4796bc62dbf9SJason Yan } 4797bc62dbf9SJason Yan 4798bc62dbf9SJason Yan blocks_count = (ext4_blocks_count(es) - 4799bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block) + 4800bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb) - 1); 4801bc62dbf9SJason Yan do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 4802bc62dbf9SJason Yan if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4803bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 4804bc62dbf9SJason Yan "(block count %llu, first data block %u, " 4805bc62dbf9SJason Yan "blocks per group %lu)", blocks_count, 4806bc62dbf9SJason Yan ext4_blocks_count(es), 4807bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4808bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb)); 4809bc62dbf9SJason Yan return -EINVAL; 4810bc62dbf9SJason Yan } 4811bc62dbf9SJason Yan sbi->s_groups_count = blocks_count; 4812bc62dbf9SJason Yan sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4813bc62dbf9SJason Yan (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4814bc62dbf9SJason Yan if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4815bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count)) { 4816bc62dbf9SJason Yan ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4817bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count), 4818bc62dbf9SJason Yan ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4819bc62dbf9SJason Yan return -EINVAL; 4820bc62dbf9SJason Yan } 4821bc62dbf9SJason Yan 4822bc62dbf9SJason Yan return 0; 4823bc62dbf9SJason Yan } 4824bc62dbf9SJason Yan 4825a4e6a511SJason Yan static int ext4_group_desc_init(struct super_block *sb, 4826a4e6a511SJason Yan struct ext4_super_block *es, 4827a4e6a511SJason Yan ext4_fsblk_t logical_sb_block, 4828a4e6a511SJason Yan ext4_group_t *first_not_zeroed) 4829a4e6a511SJason Yan { 4830a4e6a511SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4831a4e6a511SJason Yan unsigned int db_count; 4832a4e6a511SJason Yan ext4_fsblk_t block; 4833a4e6a511SJason Yan int i; 4834a4e6a511SJason Yan 4835a4e6a511SJason Yan db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4836a4e6a511SJason Yan EXT4_DESC_PER_BLOCK(sb); 4837a4e6a511SJason Yan if (ext4_has_feature_meta_bg(sb)) { 4838a4e6a511SJason Yan if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 4839a4e6a511SJason Yan ext4_msg(sb, KERN_WARNING, 4840a4e6a511SJason Yan "first meta block group too large: %u " 4841a4e6a511SJason Yan "(group descriptor block count %u)", 4842a4e6a511SJason Yan le32_to_cpu(es->s_first_meta_bg), db_count); 4843a4e6a511SJason Yan return -EINVAL; 4844a4e6a511SJason Yan } 4845a4e6a511SJason Yan } 4846a4e6a511SJason Yan rcu_assign_pointer(sbi->s_group_desc, 4847a4e6a511SJason Yan kvmalloc_array(db_count, 4848a4e6a511SJason Yan sizeof(struct buffer_head *), 4849a4e6a511SJason Yan GFP_KERNEL)); 4850a4e6a511SJason Yan if (sbi->s_group_desc == NULL) { 4851a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "not enough memory"); 4852a4e6a511SJason Yan return -ENOMEM; 4853a4e6a511SJason Yan } 4854a4e6a511SJason Yan 4855a4e6a511SJason Yan bgl_lock_init(sbi->s_blockgroup_lock); 4856a4e6a511SJason Yan 4857a4e6a511SJason Yan /* Pre-read the descriptors into the buffer cache */ 4858a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4859a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4860a4e6a511SJason Yan ext4_sb_breadahead_unmovable(sb, block); 4861a4e6a511SJason Yan } 4862a4e6a511SJason Yan 4863a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4864a4e6a511SJason Yan struct buffer_head *bh; 4865a4e6a511SJason Yan 4866a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4867a4e6a511SJason Yan bh = ext4_sb_bread_unmovable(sb, block); 4868a4e6a511SJason Yan if (IS_ERR(bh)) { 4869a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, 4870a4e6a511SJason Yan "can't read group descriptor %d", i); 4871a4e6a511SJason Yan sbi->s_gdb_count = i; 4872172e344eSYe Bin return PTR_ERR(bh); 4873a4e6a511SJason Yan } 4874a4e6a511SJason Yan rcu_read_lock(); 4875a4e6a511SJason Yan rcu_dereference(sbi->s_group_desc)[i] = bh; 4876a4e6a511SJason Yan rcu_read_unlock(); 4877a4e6a511SJason Yan } 4878a4e6a511SJason Yan sbi->s_gdb_count = db_count; 4879a4e6a511SJason Yan if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { 4880a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 4881172e344eSYe Bin return -EFSCORRUPTED; 4882a4e6a511SJason Yan } 4883172e344eSYe Bin 4884a4e6a511SJason Yan return 0; 4885a4e6a511SJason Yan } 4886a4e6a511SJason Yan 48879c1dd22dSJason Yan static int ext4_load_and_init_journal(struct super_block *sb, 48889c1dd22dSJason Yan struct ext4_super_block *es, 48899c1dd22dSJason Yan struct ext4_fs_context *ctx) 48909c1dd22dSJason Yan { 48919c1dd22dSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 48929c1dd22dSJason Yan int err; 48939c1dd22dSJason Yan 48949c1dd22dSJason Yan err = ext4_load_journal(sb, es, ctx->journal_devnum); 48959c1dd22dSJason Yan if (err) 48969c1dd22dSJason Yan return err; 48979c1dd22dSJason Yan 48989c1dd22dSJason Yan if (ext4_has_feature_64bit(sb) && 48999c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 49009c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_64BIT)) { 49019c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 49029c1dd22dSJason Yan goto out; 49039c1dd22dSJason Yan } 49049c1dd22dSJason Yan 49059c1dd22dSJason Yan if (!set_journal_csum_feature_set(sb)) { 49069c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 49079c1dd22dSJason Yan "feature set"); 49089c1dd22dSJason Yan goto out; 49099c1dd22dSJason Yan } 49109c1dd22dSJason Yan 49119c1dd22dSJason Yan if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 49129c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 49139c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 49149c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, 49159c1dd22dSJason Yan "Failed to set fast commit journal feature"); 49169c1dd22dSJason Yan goto out; 49179c1dd22dSJason Yan } 49189c1dd22dSJason Yan 49199c1dd22dSJason Yan /* We have now updated the journal if required, so we can 49209c1dd22dSJason Yan * validate the data journaling mode. */ 49219c1dd22dSJason Yan switch (test_opt(sb, DATA_FLAGS)) { 49229c1dd22dSJason Yan case 0: 49239c1dd22dSJason Yan /* No mode set, assume a default based on the journal 49249c1dd22dSJason Yan * capabilities: ORDERED_DATA if the journal can 49259c1dd22dSJason Yan * cope, else JOURNAL_DATA 49269c1dd22dSJason Yan */ 49279c1dd22dSJason Yan if (jbd2_journal_check_available_features 49289c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49299c1dd22dSJason Yan set_opt(sb, ORDERED_DATA); 49309c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 49319c1dd22dSJason Yan } else { 49329c1dd22dSJason Yan set_opt(sb, JOURNAL_DATA); 49339c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 49349c1dd22dSJason Yan } 49359c1dd22dSJason Yan break; 49369c1dd22dSJason Yan 49379c1dd22dSJason Yan case EXT4_MOUNT_ORDERED_DATA: 49389c1dd22dSJason Yan case EXT4_MOUNT_WRITEBACK_DATA: 49399c1dd22dSJason Yan if (!jbd2_journal_check_available_features 49409c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49419c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Journal does not support " 49429c1dd22dSJason Yan "requested data journaling mode"); 49439c1dd22dSJason Yan goto out; 49449c1dd22dSJason Yan } 49459c1dd22dSJason Yan break; 49469c1dd22dSJason Yan default: 49479c1dd22dSJason Yan break; 49489c1dd22dSJason Yan } 49499c1dd22dSJason Yan 49509c1dd22dSJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 49519c1dd22dSJason Yan test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 49529c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 49539c1dd22dSJason Yan "journal_async_commit in data=ordered mode"); 49549c1dd22dSJason Yan goto out; 49559c1dd22dSJason Yan } 49569c1dd22dSJason Yan 49579c1dd22dSJason Yan set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 49589c1dd22dSJason Yan 49599c1dd22dSJason Yan sbi->s_journal->j_submit_inode_data_buffers = 49609c1dd22dSJason Yan ext4_journal_submit_inode_data_buffers; 49619c1dd22dSJason Yan sbi->s_journal->j_finish_inode_data_buffers = 49629c1dd22dSJason Yan ext4_journal_finish_inode_data_buffers; 49639c1dd22dSJason Yan 49649c1dd22dSJason Yan return 0; 49659c1dd22dSJason Yan 49669c1dd22dSJason Yan out: 49679c1dd22dSJason Yan /* flush s_error_work before journal destroy. */ 49689c1dd22dSJason Yan flush_work(&sbi->s_error_work); 49699c1dd22dSJason Yan jbd2_journal_destroy(sbi->s_journal); 49709c1dd22dSJason Yan sbi->s_journal = NULL; 49719f2a1d9fSJason Yan return -EINVAL; 49729c1dd22dSJason Yan } 49739c1dd22dSJason Yan 497468e62439SJason Yan static int ext4_check_journal_data_mode(struct super_block *sb) 4975a5991e53SJason Yan { 4976a5991e53SJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4977a5991e53SJason Yan printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with " 4978a5991e53SJason Yan "data=journal disables delayed allocation, " 4979a5991e53SJason Yan "dioread_nolock, O_DIRECT and fast_commit support!\n"); 4980a5991e53SJason Yan /* can't mount with both data=journal and dioread_nolock. */ 4981a5991e53SJason Yan clear_opt(sb, DIOREAD_NOLOCK); 4982a5991e53SJason Yan clear_opt2(sb, JOURNAL_FAST_COMMIT); 4983a5991e53SJason Yan if (test_opt2(sb, EXPLICIT_DELALLOC)) { 4984a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4985a5991e53SJason Yan "both data=journal and delalloc"); 4986a5991e53SJason Yan return -EINVAL; 4987a5991e53SJason Yan } 4988a5991e53SJason Yan if (test_opt(sb, DAX_ALWAYS)) { 4989a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4990a5991e53SJason Yan "both data=journal and dax"); 4991a5991e53SJason Yan return -EINVAL; 4992a5991e53SJason Yan } 4993a5991e53SJason Yan if (ext4_has_feature_encrypt(sb)) { 4994a5991e53SJason Yan ext4_msg(sb, KERN_WARNING, 4995a5991e53SJason Yan "encrypted files will use data=ordered " 4996a5991e53SJason Yan "instead of data journaling mode"); 4997a5991e53SJason Yan } 4998a5991e53SJason Yan if (test_opt(sb, DELALLOC)) 4999a5991e53SJason Yan clear_opt(sb, DELALLOC); 5000a5991e53SJason Yan } else { 5001a5991e53SJason Yan sb->s_iflags |= SB_I_CGROUPWB; 5002a5991e53SJason Yan } 5003a5991e53SJason Yan 5004a5991e53SJason Yan return 0; 5005a5991e53SJason Yan } 5006a5991e53SJason Yan 5007a7a79c29SJason Yan static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, 5008a7a79c29SJason Yan int silent) 5009a7a79c29SJason Yan { 5010a7a79c29SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5011a7a79c29SJason Yan struct ext4_super_block *es; 5012a7a79c29SJason Yan ext4_fsblk_t logical_sb_block; 5013a7a79c29SJason Yan unsigned long offset = 0; 5014a7a79c29SJason Yan struct buffer_head *bh; 5015a7a79c29SJason Yan int ret = -EINVAL; 5016a7a79c29SJason Yan int blocksize; 5017a7a79c29SJason Yan 5018a7a79c29SJason Yan blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 5019a7a79c29SJason Yan if (!blocksize) { 5020a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 5021a7a79c29SJason Yan return -EINVAL; 5022a7a79c29SJason Yan } 5023a7a79c29SJason Yan 5024a7a79c29SJason Yan /* 5025a7a79c29SJason Yan * The ext4 superblock will not be buffer aligned for other than 1kB 5026a7a79c29SJason Yan * block sizes. We need to calculate the offset from buffer start. 5027a7a79c29SJason Yan */ 5028a7a79c29SJason Yan if (blocksize != EXT4_MIN_BLOCK_SIZE) { 5029a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5030a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5031a7a79c29SJason Yan } else { 5032a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block; 5033a7a79c29SJason Yan } 5034a7a79c29SJason Yan 5035a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5036a7a79c29SJason Yan if (IS_ERR(bh)) { 5037a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to read superblock"); 5038a7a79c29SJason Yan return PTR_ERR(bh); 5039a7a79c29SJason Yan } 5040a7a79c29SJason Yan /* 5041a7a79c29SJason Yan * Note: s_es must be initialized as soon as possible because 5042a7a79c29SJason Yan * some ext4 macro-instructions depend on its value 5043a7a79c29SJason Yan */ 5044a7a79c29SJason Yan es = (struct ext4_super_block *) (bh->b_data + offset); 5045a7a79c29SJason Yan sbi->s_es = es; 5046a7a79c29SJason Yan sb->s_magic = le16_to_cpu(es->s_magic); 5047a7a79c29SJason Yan if (sb->s_magic != EXT4_SUPER_MAGIC) { 5048a7a79c29SJason Yan if (!silent) 5049a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5050a7a79c29SJason Yan goto out; 5051a7a79c29SJason Yan } 5052a7a79c29SJason Yan 5053a7a79c29SJason Yan if (le32_to_cpu(es->s_log_block_size) > 5054a7a79c29SJason Yan (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5055a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5056a7a79c29SJason Yan "Invalid log block size: %u", 5057a7a79c29SJason Yan le32_to_cpu(es->s_log_block_size)); 5058a7a79c29SJason Yan goto out; 5059a7a79c29SJason Yan } 5060a7a79c29SJason Yan if (le32_to_cpu(es->s_log_cluster_size) > 5061a7a79c29SJason Yan (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5062a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5063a7a79c29SJason Yan "Invalid log cluster size: %u", 5064a7a79c29SJason Yan le32_to_cpu(es->s_log_cluster_size)); 5065a7a79c29SJason Yan goto out; 5066a7a79c29SJason Yan } 5067a7a79c29SJason Yan 5068a7a79c29SJason Yan blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 5069a7a79c29SJason Yan 5070a7a79c29SJason Yan /* 5071a7a79c29SJason Yan * If the default block size is not the same as the real block size, 5072a7a79c29SJason Yan * we need to reload it. 5073a7a79c29SJason Yan */ 5074a7a79c29SJason Yan if (sb->s_blocksize == blocksize) { 5075a7a79c29SJason Yan *lsb = logical_sb_block; 5076a7a79c29SJason Yan sbi->s_sbh = bh; 5077a7a79c29SJason Yan return 0; 5078a7a79c29SJason Yan } 5079a7a79c29SJason Yan 5080a7a79c29SJason Yan /* 5081a7a79c29SJason Yan * bh must be released before kill_bdev(), otherwise 5082a7a79c29SJason Yan * it won't be freed and its page also. kill_bdev() 5083a7a79c29SJason Yan * is called by sb_set_blocksize(). 5084a7a79c29SJason Yan */ 5085a7a79c29SJason Yan brelse(bh); 5086a7a79c29SJason Yan /* Validate the filesystem blocksize */ 5087a7a79c29SJason Yan if (!sb_set_blocksize(sb, blocksize)) { 5088a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "bad block size %d", 5089a7a79c29SJason Yan blocksize); 5090a7a79c29SJason Yan bh = NULL; 5091a7a79c29SJason Yan goto out; 5092a7a79c29SJason Yan } 5093a7a79c29SJason Yan 5094a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5095a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5096a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5097a7a79c29SJason Yan if (IS_ERR(bh)) { 5098a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try"); 5099a7a79c29SJason Yan ret = PTR_ERR(bh); 5100a7a79c29SJason Yan bh = NULL; 5101a7a79c29SJason Yan goto out; 5102a7a79c29SJason Yan } 5103a7a79c29SJason Yan es = (struct ext4_super_block *)(bh->b_data + offset); 5104a7a79c29SJason Yan sbi->s_es = es; 5105a7a79c29SJason Yan if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 5106a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); 5107a7a79c29SJason Yan goto out; 5108a7a79c29SJason Yan } 5109a7a79c29SJason Yan *lsb = logical_sb_block; 5110a7a79c29SJason Yan sbi->s_sbh = bh; 5111a7a79c29SJason Yan return 0; 5112a7a79c29SJason Yan out: 5113a7a79c29SJason Yan brelse(bh); 5114a7a79c29SJason Yan return ret; 5115a7a79c29SJason Yan } 5116a7a79c29SJason Yan 5117db9345d9SJason Yan static void ext4_hash_info_init(struct super_block *sb) 5118db9345d9SJason Yan { 5119db9345d9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5120db9345d9SJason Yan struct ext4_super_block *es = sbi->s_es; 5121db9345d9SJason Yan unsigned int i; 5122db9345d9SJason Yan 5123db9345d9SJason Yan for (i = 0; i < 4; i++) 5124db9345d9SJason Yan sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 5125db9345d9SJason Yan 5126db9345d9SJason Yan sbi->s_def_hash_version = es->s_def_hash_version; 5127db9345d9SJason Yan if (ext4_has_feature_dir_index(sb)) { 5128db9345d9SJason Yan i = le32_to_cpu(es->s_flags); 5129db9345d9SJason Yan if (i & EXT2_FLAGS_UNSIGNED_HASH) 5130db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5131db9345d9SJason Yan else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 5132db9345d9SJason Yan #ifdef __CHAR_UNSIGNED__ 5133db9345d9SJason Yan if (!sb_rdonly(sb)) 5134db9345d9SJason Yan es->s_flags |= 5135db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 5136db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5137db9345d9SJason Yan #else 5138db9345d9SJason Yan if (!sb_rdonly(sb)) 5139db9345d9SJason Yan es->s_flags |= 5140db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 5141db9345d9SJason Yan #endif 5142db9345d9SJason Yan } 5143db9345d9SJason Yan } 5144db9345d9SJason Yan } 5145db9345d9SJason Yan 5146107d2be9SJason Yan static int ext4_block_group_meta_init(struct super_block *sb, int silent) 5147107d2be9SJason Yan { 5148107d2be9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5149107d2be9SJason Yan struct ext4_super_block *es = sbi->s_es; 5150107d2be9SJason Yan int has_huge_files; 5151107d2be9SJason Yan 5152107d2be9SJason Yan has_huge_files = ext4_has_feature_huge_file(sb); 5153107d2be9SJason Yan sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 5154107d2be9SJason Yan has_huge_files); 5155107d2be9SJason Yan sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 5156107d2be9SJason Yan 5157107d2be9SJason Yan sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 5158107d2be9SJason Yan if (ext4_has_feature_64bit(sb)) { 5159107d2be9SJason Yan if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 5160107d2be9SJason Yan sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 5161107d2be9SJason Yan !is_power_of_2(sbi->s_desc_size)) { 5162107d2be9SJason Yan ext4_msg(sb, KERN_ERR, 5163107d2be9SJason Yan "unsupported descriptor size %lu", 5164107d2be9SJason Yan sbi->s_desc_size); 5165107d2be9SJason Yan return -EINVAL; 5166107d2be9SJason Yan } 5167107d2be9SJason Yan } else 5168107d2be9SJason Yan sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 5169107d2be9SJason Yan 5170107d2be9SJason Yan sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 5171107d2be9SJason Yan sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 5172107d2be9SJason Yan 5173107d2be9SJason Yan sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb); 5174107d2be9SJason Yan if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { 5175107d2be9SJason Yan if (!silent) 5176107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5177107d2be9SJason Yan return -EINVAL; 5178107d2be9SJason Yan } 5179107d2be9SJason Yan if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 5180107d2be9SJason Yan sbi->s_inodes_per_group > sb->s_blocksize * 8) { 5181107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 5182107d2be9SJason Yan sbi->s_inodes_per_group); 5183107d2be9SJason Yan return -EINVAL; 5184107d2be9SJason Yan } 5185107d2be9SJason Yan sbi->s_itb_per_group = sbi->s_inodes_per_group / 5186107d2be9SJason Yan sbi->s_inodes_per_block; 5187107d2be9SJason Yan sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb); 5188107d2be9SJason Yan sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 5189107d2be9SJason Yan sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 5190107d2be9SJason Yan sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 5191107d2be9SJason Yan 5192107d2be9SJason Yan return 0; 5193107d2be9SJason Yan } 5194107d2be9SJason Yan 5195960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 51967edfd85bSLukas Czerner { 5197617ba13bSMingming Cao struct ext4_super_block *es = NULL; 51987edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 519970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 5200ac27a0ecSDave Kleikamp struct inode *root; 5201107d2be9SJason Yan int needs_recovery; 5202d4fab7b2STheodore Ts'o int err; 5203bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 52047edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 5205960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 5206b237e304SHarshad Shirwadkar 5207b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 5208e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 52097edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5210ac27a0ecSDave Kleikamp 5211240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 5212f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 52138446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 5214ac27a0ecSDave Kleikamp 5215a7a79c29SJason Yan err = ext4_load_super(sb, &logical_sb_block, silent); 5216a7a79c29SJason Yan if (err) 5217ac27a0ecSDave Kleikamp goto out_fail; 5218ac27a0ecSDave Kleikamp 5219a7a79c29SJason Yan es = sbi->s_es; 5220afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 5221ac27a0ecSDave Kleikamp 5222b26458d1SJason Yan err = ext4_init_metadata_csum(sb, es); 5223b26458d1SJason Yan if (err) 5224a5fc5119SJason Yan goto failed_mount; 5225a9c47317SDarrick J. Wong 52265f6d662dSJason Yan ext4_set_def_opts(sb, es); 5227ac27a0ecSDave Kleikamp 522808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 522908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 523030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 523130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 523230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 5233ac27a0ecSDave Kleikamp 523451ce6511SLukas Czerner /* 523551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 523651ce6511SLukas Czerner * no mount option specified. 523751ce6511SLukas Czerner */ 523851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 523951ce6511SLukas Czerner 5240d4fab7b2STheodore Ts'o err = ext4_inode_info_init(sb, es); 5241d4fab7b2STheodore Ts'o if (err) 52429803387cSTheodore Ts'o goto failed_mount; 52439803387cSTheodore Ts'o 52447edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 52457edfd85bSLukas Czerner if (err < 0) 52465aee0f8aSTheodore Ts'o goto failed_mount; 52477edfd85bSLukas Czerner 52485a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 5249e3645d72SZhang Yi sbi->s_def_mount_opt2 = sbi->s_mount_opt2; 52507edfd85bSLukas Czerner 52517edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 52527edfd85bSLukas Czerner if (err < 0) 52537edfd85bSLukas Czerner goto failed_mount; 52547edfd85bSLukas Czerner 525585456054SEric Biggers ext4_apply_options(fc, sb); 5256ac27a0ecSDave Kleikamp 5257d4fab7b2STheodore Ts'o err = ext4_encoding_init(sb, es); 5258d4fab7b2STheodore Ts'o if (err) 5259c83ad55eSGabriel Krisman Bertazi goto failed_mount; 5260c83ad55eSGabriel Krisman Bertazi 5261d4fab7b2STheodore Ts'o err = ext4_check_journal_data_mode(sb); 5262d4fab7b2STheodore Ts'o if (err) 526356889787STheodore Ts'o goto failed_mount; 526456889787STheodore Ts'o 52651751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 52661751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5267ac27a0ecSDave Kleikamp 52681ff20307SJeff Layton /* i_version is always enabled now */ 52691ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 52701ff20307SJeff Layton 5271d4fab7b2STheodore Ts'o err = ext4_check_feature_compatibility(sb, es, silent); 5272d4fab7b2STheodore Ts'o if (err) 5273ac27a0ecSDave Kleikamp goto failed_mount; 5274a13fb1a4SEric Sandeen 5275d4fab7b2STheodore Ts'o err = ext4_block_group_meta_init(sb, silent); 5276d4fab7b2STheodore Ts'o if (err) 52775b9554dcSTheodore Ts'o goto failed_mount; 52785b9554dcSTheodore Ts'o 5279db9345d9SJason Yan ext4_hash_info_init(sb); 5280ac27a0ecSDave Kleikamp 5281d4fab7b2STheodore Ts'o err = ext4_handle_clustersize(sb); 5282d4fab7b2STheodore Ts'o if (err) 5283281b5995STheodore Ts'o goto failed_mount; 5284960fd856STheodore Ts'o 5285d4fab7b2STheodore Ts'o err = ext4_check_geometry(sb, es); 5286d4fab7b2STheodore Ts'o if (err) 52870f2ddca6SFrom: Thiemo Nagel goto failed_mount; 52880f2ddca6SFrom: Thiemo Nagel 5289235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5290c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5291c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 529204496411STao Ma 5293172e344eSYe Bin err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); 5294172e344eSYe Bin if (err) 5295172e344eSYe Bin goto failed_mount3; 5296172e344eSYe Bin 5297d4fab7b2STheodore Ts'o err = ext4_es_register_shrinker(sbi); 5298d4fab7b2STheodore Ts'o if (err) 5299ce7e010aSTheodore Ts'o goto failed_mount3; 5300ce7e010aSTheodore Ts'o 5301c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 530267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5303c9de560dSAlex Tomas 5304f9ae9cf5STheodore Ts'o /* 5305f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5306f9ae9cf5STheodore Ts'o */ 5307f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5308617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5309617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5310643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5311a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5312ffcc4182SEric Biggers #endif 5313c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5314c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5315c93d8f88SEric Biggers #endif 5316ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5317617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5318e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 53191fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5320262b4662SJan Kara else 5321262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5322689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5323ac27a0ecSDave Kleikamp #endif 532485787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5325f2fa2ffcSAneesh Kumar K.V 5326ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 53273b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5328ac27a0ecSDave Kleikamp 5329f7314a67SJason Yan ext4_fast_commit_init(sb); 5330aa75f4d3SHarshad Shirwadkar 5331ac27a0ecSDave Kleikamp sb->s_root = NULL; 5332ac27a0ecSDave Kleikamp 5333ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 533402f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5335e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5336ac27a0ecSDave Kleikamp 53373b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) { 53383b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block)); 53393b50d501STheodore Ts'o if (err) 534050460fe8SDarrick J. Wong goto failed_mount3a; 53413b50d501STheodore Ts'o } 5342c5e06d10SJohann Lombardi 5343d4fab7b2STheodore Ts'o err = -EINVAL; 5344ac27a0ecSDave Kleikamp /* 5345ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5346ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5347ac27a0ecSDave Kleikamp */ 5348e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 53499c1dd22dSJason Yan err = ext4_load_and_init_journal(sb, es, ctx); 53504753d8a2STheodore Ts'o if (err) 535150460fe8SDarrick J. Wong goto failed_mount3a; 5352bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5353e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5354b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5355b31e1552SEric Sandeen "suppressed and not mounted read-only"); 535643bd6f1bSJason Yan goto failed_mount3a; 5357ac27a0ecSDave Kleikamp } else { 53581e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 53591e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 53601e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53611e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 536243bd6f1bSJason Yan goto failed_mount3a; 53631e381f60SDmitry Monakhov } 536489481b5fSBaokun Li 536589481b5fSBaokun Li if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 536689481b5fSBaokun Li ext4_msg(sb, KERN_ERR, "can't mount with " 536789481b5fSBaokun Li "journal_checksum, fs mounted w/o journal"); 536889481b5fSBaokun Li goto failed_mount3a; 536989481b5fSBaokun Li } 53701e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 53711e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53721e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 53731e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 537443bd6f1bSJason Yan goto failed_mount3a; 53751e381f60SDmitry Monakhov } 53761e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 53771e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 53781e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53791e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 538043bd6f1bSJason Yan goto failed_mount3a; 53811e381f60SDmitry Monakhov } 538250b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 53831e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5384fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5385995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 53860390131bSFrank Mayhar sbi->s_journal = NULL; 53870390131bSFrank Mayhar needs_recovery = 0; 5388ac27a0ecSDave Kleikamp } 5389ac27a0ecSDave Kleikamp 5390cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 539147387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 539247387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5393cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5394cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 5395d4fab7b2STheodore Ts'o err = -EINVAL; 53969c191f70ST Makphaibulchoke goto failed_mount_wq; 53979c191f70ST Makphaibulchoke } 53989c191f70ST Makphaibulchoke 5399dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5400dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5401dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5402dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5403dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5404d4fab7b2STheodore Ts'o err = -EINVAL; 5405dec214d0STahsin Erdogan goto failed_mount_wq; 5406dec214d0STahsin Erdogan } 5407dec214d0STahsin Erdogan } 5408cdb7ee4cSTahsin Erdogan } 5409dec214d0STahsin Erdogan 5410fd89d5f2STejun Heo /* 5411952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5412952fc18eSTheodore Ts'o * superblock if present. 5413952fc18eSTheodore Ts'o */ 5414952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 541585d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 541685d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 541785d825dbSTheodore Ts'o sbi->s_overhead = 0; 541885d825dbSTheodore Ts'o /* 541985d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 542085d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 542185d825dbSTheodore Ts'o * it to make sure we are using the correct value. 542285d825dbSTheodore Ts'o */ 542385d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 542485d825dbSTheodore Ts'o sbi->s_overhead = 0; 542585d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 542607aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 542707aa2ea1SLukas Czerner if (err) 5428952fc18eSTheodore Ts'o goto failed_mount_wq; 5429952fc18eSTheodore Ts'o } 5430952fc18eSTheodore Ts'o 5431952fc18eSTheodore Ts'o /* 5432fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5433fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5434fd89d5f2STejun Heo */ 54352e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 54362e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 54372e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 54382e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 5439d4fab7b2STheodore Ts'o err = -ENOMEM; 54402e8fa54eSJan Kara goto failed_mount4; 54412e8fa54eSJan Kara } 54422e8fa54eSJan Kara 5443ac27a0ecSDave Kleikamp /* 5444dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5445ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5446ac27a0ecSDave Kleikamp */ 5447ac27a0ecSDave Kleikamp 54488a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 54491d1fe1eeSDavid Howells if (IS_ERR(root)) { 5450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 5451d4fab7b2STheodore Ts'o err = PTR_ERR(root); 545232a9bb57SManish Katiyar root = NULL; 5453ac27a0ecSDave Kleikamp goto failed_mount4; 5454ac27a0ecSDave Kleikamp } 5455ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5456b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 545794bf608aSAl Viro iput(root); 5458d4fab7b2STheodore Ts'o err = -EFSCORRUPTED; 5459ac27a0ecSDave Kleikamp goto failed_mount4; 5460ac27a0ecSDave Kleikamp } 5461b886ee3eSGabriel Krisman Bertazi 546248fde701SAl Viro sb->s_root = d_make_root(root); 54631d1fe1eeSDavid Howells if (!sb->s_root) { 5464b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 5465d4fab7b2STheodore Ts'o err = -ENOMEM; 54661d1fe1eeSDavid Howells goto failed_mount4; 54671d1fe1eeSDavid Howells } 5468ac27a0ecSDave Kleikamp 5469d4fab7b2STheodore Ts'o err = ext4_setup_super(sb, es, sb_rdonly(sb)); 5470d4fab7b2STheodore Ts'o if (err == -EROFS) { 54711751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5472d4fab7b2STheodore Ts'o } else if (err) 5473c89128a0SJaegeuk Kim goto failed_mount4a; 5474ef7f3835SKalpak Shah 5475b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 547627dd4385SLukas Czerner 54770f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 54786fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 54796fd058f7STheodore Ts'o if (err) { 5480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5481fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5482f9ae9cf5STheodore Ts'o goto failed_mount4a; 5483f9ae9cf5STheodore Ts'o } 54840f5bde1dSJan Kara } 54858016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5486f9ae9cf5STheodore Ts'o 5487f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5488196e402aSHarshad Shirwadkar 5489196e402aSHarshad Shirwadkar /* 5490196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5491196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5492196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5493196e402aSHarshad Shirwadkar */ 549427b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 549527b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5496196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 549727b38686SOjaswin Mujoo else 5498196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 549927b38686SOjaswin Mujoo } 5500196e402aSHarshad Shirwadkar 5501f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5502f9ae9cf5STheodore Ts'o if (err) { 5503f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5504f9ae9cf5STheodore Ts'o err); 5505dcf2d804STao Ma goto failed_mount5; 5506c2774d84SAneesh Kumar K.V } 5507c2774d84SAneesh Kumar K.V 5508027f14f5STheodore Ts'o /* 5509027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5510027f14f5STheodore Ts'o * mballoc is initialized 5511027f14f5STheodore Ts'o */ 5512027f14f5STheodore Ts'o if (sbi->s_journal) 5513027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5514027f14f5STheodore Ts'o ext4_journal_commit_callback; 5515027f14f5STheodore Ts'o 5516d5e72c4eSTheodore Ts'o err = ext4_percpu_param_init(sbi); 5517d5e72c4eSTheodore Ts'o if (err) 5518d5e03cbbSTheodore Ts'o goto failed_mount6; 5519d5e03cbbSTheodore Ts'o 5520e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5521d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5522d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5523d5e03cbbSTheodore Ts'o "unable to initialize " 5524d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 5525d4fab7b2STheodore Ts'o err = -ENOMEM; 5526d5e03cbbSTheodore Ts'o goto failed_mount6; 5527d5e03cbbSTheodore Ts'o } 5528d5e03cbbSTheodore Ts'o 5529bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5530bfff6873SLukas Czerner if (err) 5531dcf2d804STao Ma goto failed_mount6; 5532bfff6873SLukas Czerner 5533b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5534dcf2d804STao Ma if (err) 5535dcf2d804STao Ma goto failed_mount7; 55363197ebdbSTheodore Ts'o 553702f310fcSJan Kara err = ext4_init_orphan_info(sb); 553802f310fcSJan Kara if (err) 553902f310fcSJan Kara goto failed_mount8; 55409b2ff357SJan Kara #ifdef CONFIG_QUOTA 55419b2ff357SJan Kara /* Enable quota usage during mount. */ 5542bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 55439b2ff357SJan Kara err = ext4_enable_quotas(sb); 55449b2ff357SJan Kara if (err) 554502f310fcSJan Kara goto failed_mount9; 55469b2ff357SJan Kara } 55479b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 55489b2ff357SJan Kara 5549bc71726cSzhangyi (F) /* 5550bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5551bc71726cSzhangyi (F) * used to detect the metadata async write error. 5552bc71726cSzhangyi (F) */ 5553bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5554bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5555bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5556bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5557617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5558617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5559617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 55609b6641ddSYe Bin /* 55619b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 55629b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 55639b6641ddSYe Bin * checksum in the buffer cache until it is written out and 55649b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 55659b6641ddSYe Bin * after it is mounted can fail. 55669b6641ddSYe Bin */ 55679b6641ddSYe Bin ext4_superblock_csum_set(sb); 55680390131bSFrank Mayhar if (needs_recovery) { 5569b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 557011215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 557111215630SJan Kara if (err) 557202f310fcSJan Kara goto failed_mount9; 55730390131bSFrank Mayhar } 55740390131bSFrank Mayhar 557570200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 557679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 557770200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 557879add3a3SLukas Czerner 557966e61a9eSTheodore Ts'o if (es->s_error_count) 558066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5581ac27a0ecSDave Kleikamp 5582efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5583efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5584efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5585efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 55861cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 55871cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5588efbed4dcSTheodore Ts'o 5589ac27a0ecSDave Kleikamp return 0; 5590ac27a0ecSDave Kleikamp 559102f310fcSJan Kara failed_mount9: 559202f310fcSJan Kara ext4_release_orphan_info(sb); 559372ba7450STheodore Ts'o failed_mount8: 5594ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5595cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5596dcf2d804STao Ma failed_mount7: 5597dcf2d804STao Ma ext4_unregister_li_request(sb); 5598dcf2d804STao Ma failed_mount6: 5599f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 5600dcbf8758SJason Yan ext4_flex_groups_free(sbi); 56011f79467cSJason Yan ext4_percpu_param_destroy(sbi); 560200764937SAzat Khuzhin failed_mount5: 5603f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5604f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5605f9ae9cf5STheodore Ts'o failed_mount4a: 560694bf608aSAl Viro dput(sb->s_root); 560732a9bb57SManish Katiyar sb->s_root = NULL; 560894bf608aSAl Viro failed_mount4: 5609b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 56102e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 56112e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 56124c0425ffSMingming Cao failed_mount_wq: 5613dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5614dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 561550c15df6SChengguang Xu 561647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 561747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 561850c15df6SChengguang Xu 56190390131bSFrank Mayhar if (sbi->s_journal) { 5620bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5621bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5622dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 562347b4a50bSJan Kara sbi->s_journal = NULL; 56240390131bSFrank Mayhar } 562550460fe8SDarrick J. Wong failed_mount3a: 5626d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5627eb68d0e2SZheng Liu failed_mount3: 5628bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5629c92dc856SJan Kara flush_work(&sbi->s_error_work); 56302a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5631618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5632a4e6a511SJason Yan ext4_group_desc_free(sbi); 5633ac27a0ecSDave Kleikamp failed_mount: 56340441984aSDarrick J. Wong if (sbi->s_chksum_driver) 56350441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5636c83ad55eSGabriel Krisman Bertazi 56375298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5638f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5639c83ad55eSGabriel Krisman Bertazi #endif 5640c83ad55eSGabriel Krisman Bertazi 5641ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5642856dd6c5SNathan Chancellor for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++) 56430ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5644ac27a0ecSDave Kleikamp #endif 5645ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5646afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5647a7a79c29SJason Yan brelse(sbi->s_sbh); 5648afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5649ac27a0ecSDave Kleikamp out_fail: 5650ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5651d4fab7b2STheodore Ts'o return err; 5652ac27a0ecSDave Kleikamp } 5653ac27a0ecSDave Kleikamp 5654cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 56557edfd85bSLukas Czerner { 5656cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 56577edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56587edfd85bSLukas Czerner const char *descr; 5659cebe85d5SLukas Czerner int ret; 56607edfd85bSLukas Czerner 5661cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5662cebe85d5SLukas Czerner if (!sbi) 56637c268d4cSLukas Czerner return -ENOMEM; 5664cebe85d5SLukas Czerner 5665cebe85d5SLukas Czerner fc->s_fs_info = sbi; 56667edfd85bSLukas Czerner 56677edfd85bSLukas Czerner /* Cleanup superblock name */ 56687edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56697edfd85bSLukas Czerner 56707edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5671cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5672cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 56737edfd85bSLukas Czerner 5674960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 56757edfd85bSLukas Czerner if (ret < 0) 56767edfd85bSLukas Czerner goto free_sbi; 56777edfd85bSLukas Czerner 5678cebe85d5SLukas Czerner if (sbi->s_journal) { 56797edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56807edfd85bSLukas Czerner descr = " journalled data mode"; 56817edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56827edfd85bSLukas Czerner descr = " ordered data mode"; 56837edfd85bSLukas Czerner else 56847edfd85bSLukas Czerner descr = " writeback data mode"; 56857edfd85bSLukas Czerner } else 56867edfd85bSLukas Czerner descr = "out journal"; 56877edfd85bSLukas Czerner 56887edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5689bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem %pU with%s. " 5690bb0fbc78SLukas Czerner "Quota mode: %s.", &sb->s_uuid, descr, 5691bb0fbc78SLukas Czerner ext4_quota_mode(sb)); 56927edfd85bSLukas Czerner 5693eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5694827891a3STheodore Ts'o ext4_update_overhead(sb, false); 56957edfd85bSLukas Czerner return 0; 5696cebe85d5SLukas Czerner 56977edfd85bSLukas Czerner free_sbi: 56987edfd85bSLukas Czerner ext4_free_sbi(sbi); 5699cebe85d5SLukas Czerner fc->s_fs_info = NULL; 57007edfd85bSLukas Czerner return ret; 57017edfd85bSLukas Czerner } 57027edfd85bSLukas Czerner 5703cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5704cebe85d5SLukas Czerner { 5705cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5706cebe85d5SLukas Czerner } 5707cebe85d5SLukas Czerner 5708ac27a0ecSDave Kleikamp /* 5709ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5710ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5711ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5712ac27a0ecSDave Kleikamp */ 5713617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5714ac27a0ecSDave Kleikamp { 5715617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5716ac27a0ecSDave Kleikamp 5717ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 571830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 571930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 57206866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5721ac27a0ecSDave Kleikamp 5722a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5723ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5724dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5725ac27a0ecSDave Kleikamp else 5726dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57275bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57285bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57295bf5683aSHidehiro Kawai else 57305bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5731a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5732ac27a0ecSDave Kleikamp } 5733ac27a0ecSDave Kleikamp 5734c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5735ac27a0ecSDave Kleikamp unsigned int journal_inum) 5736ac27a0ecSDave Kleikamp { 5737ac27a0ecSDave Kleikamp struct inode *journal_inode; 5738ac27a0ecSDave Kleikamp 5739c6cb7e77SEric Whitney /* 5740c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5741c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5742c6cb7e77SEric Whitney * will try to delete it. 5743c6cb7e77SEric Whitney */ 57448a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57451d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5747ac27a0ecSDave Kleikamp return NULL; 5748ac27a0ecSDave Kleikamp } 5749ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5750ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5751ac27a0ecSDave Kleikamp iput(journal_inode); 5752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5753ac27a0ecSDave Kleikamp return NULL; 5754ac27a0ecSDave Kleikamp } 5755ac27a0ecSDave Kleikamp 57564978c659SJan Kara ext4_debug("Journal inode found at %p: %lld bytes\n", 5757ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 5758105c78e1SEric Biggers if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) { 5759b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5760ac27a0ecSDave Kleikamp iput(journal_inode); 5761ac27a0ecSDave Kleikamp return NULL; 5762ac27a0ecSDave Kleikamp } 5763c6cb7e77SEric Whitney return journal_inode; 5764c6cb7e77SEric Whitney } 5765c6cb7e77SEric Whitney 576662913ae9STheodore Ts'o static int ext4_journal_bmap(journal_t *journal, sector_t *block) 576762913ae9STheodore Ts'o { 576862913ae9STheodore Ts'o struct ext4_map_blocks map; 576962913ae9STheodore Ts'o int ret; 577062913ae9STheodore Ts'o 577162913ae9STheodore Ts'o if (journal->j_inode == NULL) 577262913ae9STheodore Ts'o return 0; 577362913ae9STheodore Ts'o 577462913ae9STheodore Ts'o map.m_lblk = *block; 577562913ae9STheodore Ts'o map.m_len = 1; 577662913ae9STheodore Ts'o ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0); 577762913ae9STheodore Ts'o if (ret <= 0) { 577862913ae9STheodore Ts'o ext4_msg(journal->j_inode->i_sb, KERN_CRIT, 577962913ae9STheodore Ts'o "journal bmap failed: block %llu ret %d\n", 578062913ae9STheodore Ts'o *block, ret); 578162913ae9STheodore Ts'o jbd2_journal_abort(journal, ret ? ret : -EIO); 578262913ae9STheodore Ts'o return ret; 578362913ae9STheodore Ts'o } 578462913ae9STheodore Ts'o *block = map.m_pblk; 578562913ae9STheodore Ts'o return 0; 578662913ae9STheodore Ts'o } 578762913ae9STheodore Ts'o 5788c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5789c6cb7e77SEric Whitney unsigned int journal_inum) 5790c6cb7e77SEric Whitney { 5791c6cb7e77SEric Whitney struct inode *journal_inode; 5792c6cb7e77SEric Whitney journal_t *journal; 5793c6cb7e77SEric Whitney 579411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 579511215630SJan Kara return NULL; 5796c6cb7e77SEric Whitney 5797c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5798c6cb7e77SEric Whitney if (!journal_inode) 5799c6cb7e77SEric Whitney return NULL; 5800ac27a0ecSDave Kleikamp 5801dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5802ac27a0ecSDave Kleikamp if (!journal) { 5803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5804ac27a0ecSDave Kleikamp iput(journal_inode); 5805ac27a0ecSDave Kleikamp return NULL; 5806ac27a0ecSDave Kleikamp } 5807ac27a0ecSDave Kleikamp journal->j_private = sb; 580862913ae9STheodore Ts'o journal->j_bmap = ext4_journal_bmap; 5809617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5810ac27a0ecSDave Kleikamp return journal; 5811ac27a0ecSDave Kleikamp } 5812ac27a0ecSDave Kleikamp 5813617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5814ac27a0ecSDave Kleikamp dev_t j_dev) 5815ac27a0ecSDave Kleikamp { 5816ac27a0ecSDave Kleikamp struct buffer_head *bh; 5817ac27a0ecSDave Kleikamp journal_t *journal; 5818617ba13bSMingming Cao ext4_fsblk_t start; 5819617ba13bSMingming Cao ext4_fsblk_t len; 5820ac27a0ecSDave Kleikamp int hblock, blocksize; 5821617ba13bSMingming Cao ext4_fsblk_t sb_block; 5822ac27a0ecSDave Kleikamp unsigned long offset; 5823617ba13bSMingming Cao struct ext4_super_block *es; 5824ac27a0ecSDave Kleikamp struct block_device *bdev; 5825ac27a0ecSDave Kleikamp 582611215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 582711215630SJan Kara return NULL; 58280390131bSFrank Mayhar 5829b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5830ac27a0ecSDave Kleikamp if (bdev == NULL) 5831ac27a0ecSDave Kleikamp return NULL; 5832ac27a0ecSDave Kleikamp 5833ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5834e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5835ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5836b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5837b31e1552SEric Sandeen "blocksize too small for journal device"); 5838ac27a0ecSDave Kleikamp goto out_bdev; 5839ac27a0ecSDave Kleikamp } 5840ac27a0ecSDave Kleikamp 5841617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5842617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5843ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5844ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5846b31e1552SEric Sandeen "external journal"); 5847ac27a0ecSDave Kleikamp goto out_bdev; 5848ac27a0ecSDave Kleikamp } 5849ac27a0ecSDave Kleikamp 58502716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5851617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5852ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5853617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5854b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5855b31e1552SEric Sandeen "bad superblock"); 5856ac27a0ecSDave Kleikamp brelse(bh); 5857ac27a0ecSDave Kleikamp goto out_bdev; 5858ac27a0ecSDave Kleikamp } 5859ac27a0ecSDave Kleikamp 5860df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5861df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5862df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5863df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5864df4763beSDarrick J. Wong "corrupt superblock"); 5865df4763beSDarrick J. Wong brelse(bh); 5866df4763beSDarrick J. Wong goto out_bdev; 5867df4763beSDarrick J. Wong } 5868df4763beSDarrick J. Wong 5869617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5870b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5871ac27a0ecSDave Kleikamp brelse(bh); 5872ac27a0ecSDave Kleikamp goto out_bdev; 5873ac27a0ecSDave Kleikamp } 5874ac27a0ecSDave Kleikamp 5875bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5876ac27a0ecSDave Kleikamp start = sb_block + 1; 5877ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5878ac27a0ecSDave Kleikamp 5879dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5880ac27a0ecSDave Kleikamp start, len, blocksize); 5881ac27a0ecSDave Kleikamp if (!journal) { 5882b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5883ac27a0ecSDave Kleikamp goto out_bdev; 5884ac27a0ecSDave Kleikamp } 5885ac27a0ecSDave Kleikamp journal->j_private = sb; 58862d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5887b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5888ac27a0ecSDave Kleikamp goto out_journal; 5889ac27a0ecSDave Kleikamp } 5890ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5891b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5892b31e1552SEric Sandeen "user (unsupported) - %d", 5893ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5894ac27a0ecSDave Kleikamp goto out_journal; 5895ac27a0ecSDave Kleikamp } 5896ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5897617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5898ac27a0ecSDave Kleikamp return journal; 58990b8e58a1SAndreas Dilger 5900ac27a0ecSDave Kleikamp out_journal: 5901dab291afSMingming Cao jbd2_journal_destroy(journal); 5902ac27a0ecSDave Kleikamp out_bdev: 5903617ba13bSMingming Cao ext4_blkdev_put(bdev); 5904ac27a0ecSDave Kleikamp return NULL; 5905ac27a0ecSDave Kleikamp } 5906ac27a0ecSDave Kleikamp 5907617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5908617ba13bSMingming Cao struct ext4_super_block *es, 5909ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5910ac27a0ecSDave Kleikamp { 5911ac27a0ecSDave Kleikamp journal_t *journal; 5912ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5913ac27a0ecSDave Kleikamp dev_t journal_dev; 5914ac27a0ecSDave Kleikamp int err = 0; 5915ac27a0ecSDave Kleikamp int really_read_only; 5916273108faSLukas Czerner int journal_dev_ro; 5917ac27a0ecSDave Kleikamp 591811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 591911215630SJan Kara return -EFSCORRUPTED; 59200390131bSFrank Mayhar 5921ac27a0ecSDave Kleikamp if (journal_devnum && 5922ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5923b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5924b31e1552SEric Sandeen "numbers have changed"); 5925ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5926ac27a0ecSDave Kleikamp } else 5927ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5928ac27a0ecSDave Kleikamp 5929273108faSLukas Czerner if (journal_inum && journal_dev) { 5930273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5931273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5932273108faSLukas Czerner return -EINVAL; 5933273108faSLukas Czerner } 5934273108faSLukas Czerner 5935273108faSLukas Czerner if (journal_inum) { 5936273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5937273108faSLukas Czerner if (!journal) 5938273108faSLukas Czerner return -EINVAL; 5939273108faSLukas Czerner } else { 5940273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5941273108faSLukas Czerner if (!journal) 5942273108faSLukas Czerner return -EINVAL; 5943273108faSLukas Czerner } 5944273108faSLukas Czerner 5945273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5946273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5947273108faSLukas Czerner 5948273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5949273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5950273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5951273108faSLukas Czerner err = -EROFS; 5952273108faSLukas Czerner goto err_out; 5953273108faSLukas Czerner } 5954ac27a0ecSDave Kleikamp 5955ac27a0ecSDave Kleikamp /* 5956ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5957ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5958ac27a0ecSDave Kleikamp * can get read-write access to the device. 5959ac27a0ecSDave Kleikamp */ 5960e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5961bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5962b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5963b31e1552SEric Sandeen "required on readonly filesystem"); 5964ac27a0ecSDave Kleikamp if (really_read_only) { 5965b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5966d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5967d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5968273108faSLukas Czerner err = -EROFS; 5969273108faSLukas Czerner goto err_out; 5970ac27a0ecSDave Kleikamp } 5971b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5972b31e1552SEric Sandeen "be enabled during recovery"); 5973ac27a0ecSDave Kleikamp } 5974ac27a0ecSDave Kleikamp } 5975ac27a0ecSDave Kleikamp 597690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5977b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 59784776004fSTheodore Ts'o 5979e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5980dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 59811c13d5c0STheodore Ts'o if (!err) { 59821c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 5983eee00237SYe Bin 59841c13d5c0STheodore Ts'o if (save) 59851c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 59861c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5987dab291afSMingming Cao err = jbd2_journal_load(journal); 59881c13d5c0STheodore Ts'o if (save) 59891c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 59901c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 59911c13d5c0STheodore Ts'o kfree(save); 5992eee00237SYe Bin es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state & 5993eee00237SYe Bin EXT4_ERROR_FS); 5994eee00237SYe Bin /* Write out restored error information to the superblock */ 5995eee00237SYe Bin if (!bdev_read_only(sb->s_bdev)) { 5996eee00237SYe Bin int err2; 5997eee00237SYe Bin err2 = ext4_commit_super(sb); 5998eee00237SYe Bin err = err ? : err2; 5999eee00237SYe Bin } 60001c13d5c0STheodore Ts'o } 6001ac27a0ecSDave Kleikamp 6002ac27a0ecSDave Kleikamp if (err) { 6003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 6004273108faSLukas Czerner goto err_out; 6005ac27a0ecSDave Kleikamp } 6006ac27a0ecSDave Kleikamp 6007617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 600811215630SJan Kara err = ext4_clear_journal_err(sb, es); 600911215630SJan Kara if (err) { 601011215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 601111215630SJan Kara jbd2_journal_destroy(journal); 601211215630SJan Kara return err; 601311215630SJan Kara } 6014ac27a0ecSDave Kleikamp 6015c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 6016ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 6017ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 60183039d8b8SBaokun Li ext4_commit_super(sb); 60193039d8b8SBaokun Li } 60203039d8b8SBaokun Li if (!really_read_only && journal_inum && 60213039d8b8SBaokun Li journal_inum != le32_to_cpu(es->s_journal_inum)) { 60223039d8b8SBaokun Li es->s_journal_inum = cpu_to_le32(journal_inum); 60234392fbc4SJan Kara ext4_commit_super(sb); 6024ac27a0ecSDave Kleikamp } 6025ac27a0ecSDave Kleikamp 6026ac27a0ecSDave Kleikamp return 0; 6027273108faSLukas Czerner 6028273108faSLukas Czerner err_out: 6029273108faSLukas Czerner jbd2_journal_destroy(journal); 6030273108faSLukas Czerner return err; 6031ac27a0ecSDave Kleikamp } 6032ac27a0ecSDave Kleikamp 60332d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 60342d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 6035ac27a0ecSDave Kleikamp { 6036c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 6037e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 6038e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 6039ac27a0ecSDave Kleikamp 604005c2c00fSJan Kara lock_buffer(sbh); 6041a17712c8SJon Derrick /* 604271290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 604371290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 604471290b36STheodore Ts'o * write time when we are mounting the root file system 604571290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 604671290b36STheodore Ts'o * for people who are east of GMT and who make their clock 604771290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 604871290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 604971290b36STheodore Ts'o * to complain and force a full file system check. 605071290b36STheodore Ts'o */ 60511751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 60526a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 6053afc32f7eSTheodore Ts'o es->s_kbytes_written = 6054e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 60558446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6056e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6057e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 605857042651STheodore Ts'o ext4_free_blocks_count_set(es, 6059e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6060e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6061e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 60627f93cff9STheodore Ts'o es->s_free_inodes_count = 60637f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6064e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6065c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6066c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6067c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6068c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6069c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6070c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6071c92dc856SJan Kara &es->s_first_error_time_hi, 6072c92dc856SJan Kara sbi->s_first_error_time); 6073c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 6074c92dc856SJan Kara sizeof(es->s_first_error_func)); 6075c92dc856SJan Kara es->s_first_error_line = 6076c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6077c92dc856SJan Kara es->s_first_error_ino = 6078c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6079c92dc856SJan Kara es->s_first_error_block = 6080c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6081c92dc856SJan Kara es->s_first_error_errcode = 6082c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6083c92dc856SJan Kara } 6084c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6085c92dc856SJan Kara &es->s_last_error_time_hi, 6086c92dc856SJan Kara sbi->s_last_error_time); 6087c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 6088c92dc856SJan Kara sizeof(es->s_last_error_func)); 6089c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6090c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6091c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6092c92dc856SJan Kara es->s_last_error_errcode = 6093c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6094c92dc856SJan Kara /* 6095c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6096c92dc856SJan Kara * started already 6097c92dc856SJan Kara */ 6098c92dc856SJan Kara if (!es->s_error_count) 6099c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6100c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6101c92dc856SJan Kara sbi->s_add_error_count = 0; 6102c92dc856SJan Kara } 6103c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6104c92dc856SJan Kara 610506db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 61062d01ddc8SJan Kara unlock_buffer(sbh); 61072d01ddc8SJan Kara } 61082d01ddc8SJan Kara 61092d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 61102d01ddc8SJan Kara { 61112d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 61122d01ddc8SJan Kara 6113f88f1466SFengnan Chang if (!sbh) 6114f88f1466SFengnan Chang return -EINVAL; 6115f88f1466SFengnan Chang if (block_device_ejected(sb)) 6116f88f1466SFengnan Chang return -ENODEV; 61172d01ddc8SJan Kara 61182d01ddc8SJan Kara ext4_update_super(sb); 61192d01ddc8SJan Kara 612015baa7dcSZhang Yi lock_buffer(sbh); 612115baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 612215baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 612315baa7dcSZhang Yi unlock_buffer(sbh); 612415baa7dcSZhang Yi return -EIO; 612515baa7dcSZhang Yi } 612615baa7dcSZhang Yi 6127e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 61284743f839SPranay Kr. Srivastava /* 61294743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 61304743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 61314743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 61324743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 61334743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 61344743f839SPranay Kr. Srivastava * write and hope for the best. 61354743f839SPranay Kr. Srivastava */ 61364743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 61374743f839SPranay Kr. Srivastava "superblock detected"); 61384743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 61394743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 61404743f839SPranay Kr. Srivastava } 614115baa7dcSZhang Yi get_bh(sbh); 614215baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 614315baa7dcSZhang Yi clear_buffer_dirty(sbh); 614415baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 61451420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 61461420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 614715baa7dcSZhang Yi wait_on_buffer(sbh); 6148c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6150b31e1552SEric Sandeen "superblock"); 6151914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6152914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 615315baa7dcSZhang Yi return -EIO; 6154914258bfSTheodore Ts'o } 615515baa7dcSZhang Yi return 0; 6156ac27a0ecSDave Kleikamp } 6157ac27a0ecSDave Kleikamp 6158ac27a0ecSDave Kleikamp /* 6159ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6160ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6161ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6162ac27a0ecSDave Kleikamp */ 616311215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6164617ba13bSMingming Cao struct ext4_super_block *es) 6165ac27a0ecSDave Kleikamp { 616611215630SJan Kara int err; 6167617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6168ac27a0ecSDave Kleikamp 6169e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 617011215630SJan Kara if (journal != NULL) { 617111215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 617211215630SJan Kara "mounted!"); 617311215630SJan Kara return -EFSCORRUPTED; 617411215630SJan Kara } 617511215630SJan Kara return 0; 61760390131bSFrank Mayhar } 6177dab291afSMingming Cao jbd2_journal_lock_updates(journal); 617801d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 617911215630SJan Kara if (err < 0) 61807ffe1ea8SHidehiro Kawai goto out; 61817ffe1ea8SHidehiro Kawai 618202f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 618302f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 618402f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 618502f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 618602f310fcSJan Kara err = -EFSCORRUPTED; 618702f310fcSJan Kara goto out; 618802f310fcSJan Kara } 6189e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 619002f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 61914392fbc4SJan Kara ext4_commit_super(sb); 6192ac27a0ecSDave Kleikamp } 61937ffe1ea8SHidehiro Kawai out: 6194dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 619511215630SJan Kara return err; 6196ac27a0ecSDave Kleikamp } 6197ac27a0ecSDave Kleikamp 6198ac27a0ecSDave Kleikamp /* 6199ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6200ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6201ac27a0ecSDave Kleikamp * main filesystem now. 6202ac27a0ecSDave Kleikamp */ 620311215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6204617ba13bSMingming Cao struct ext4_super_block *es) 6205ac27a0ecSDave Kleikamp { 6206ac27a0ecSDave Kleikamp journal_t *journal; 6207ac27a0ecSDave Kleikamp int j_errno; 6208ac27a0ecSDave Kleikamp const char *errstr; 6209ac27a0ecSDave Kleikamp 621011215630SJan Kara if (!ext4_has_feature_journal(sb)) { 621111215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 621211215630SJan Kara return -EFSCORRUPTED; 621311215630SJan Kara } 62140390131bSFrank Mayhar 6215617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6216ac27a0ecSDave Kleikamp 6217ac27a0ecSDave Kleikamp /* 6218ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6219617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6220ac27a0ecSDave Kleikamp */ 6221ac27a0ecSDave Kleikamp 6222dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6223ac27a0ecSDave Kleikamp if (j_errno) { 6224ac27a0ecSDave Kleikamp char nbuf[16]; 6225ac27a0ecSDave Kleikamp 6226617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 622712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6228ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 6229ac27a0ecSDave Kleikamp 6230617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6231617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6232f57886caSYe Bin j_errno = ext4_commit_super(sb); 6233f57886caSYe Bin if (j_errno) 6234f57886caSYe Bin return j_errno; 6235f57886caSYe Bin ext4_warning(sb, "Marked fs in need of filesystem check."); 6236ac27a0ecSDave Kleikamp 6237dab291afSMingming Cao jbd2_journal_clear_err(journal); 6238d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6239ac27a0ecSDave Kleikamp } 624011215630SJan Kara return 0; 6241ac27a0ecSDave Kleikamp } 6242ac27a0ecSDave Kleikamp 6243ac27a0ecSDave Kleikamp /* 6244ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6245ac27a0ecSDave Kleikamp * and wait on the commit. 6246ac27a0ecSDave Kleikamp */ 6247617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6248ac27a0ecSDave Kleikamp { 6249ac27a0ecSDave Kleikamp journal_t *journal; 6250ac27a0ecSDave Kleikamp 6251bc98a42cSDavid Howells if (sb_rdonly(sb)) 6252ac27a0ecSDave Kleikamp return 0; 6253ac27a0ecSDave Kleikamp 6254617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6255b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6256ac27a0ecSDave Kleikamp } 6257ac27a0ecSDave Kleikamp 6258617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6259ac27a0ecSDave Kleikamp { 626014ce0cb4STheodore Ts'o int ret = 0; 62619eddacf9SJan Kara tid_t target; 626206a407f1SDmitry Monakhov bool needs_barrier = false; 62638d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6264ac27a0ecSDave Kleikamp 626549598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 62660db1ff22STheodore Ts'o return 0; 62670db1ff22STheodore Ts'o 62689bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 62692e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6270a1177825SJan Kara /* 6271a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6272a1177825SJan Kara * no dirty dquots 6273a1177825SJan Kara */ 6274a1177825SJan Kara dquot_writeback_dquots(sb, -1); 627506a407f1SDmitry Monakhov /* 627606a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 627706a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 627806a407f1SDmitry Monakhov * transaction_commit will do it for us. 627906a407f1SDmitry Monakhov */ 6280bda32530STheodore Ts'o if (sbi->s_journal) { 628106a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 628206a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 628306a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 628406a407f1SDmitry Monakhov needs_barrier = true; 628506a407f1SDmitry Monakhov 62868d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6287ac27a0ecSDave Kleikamp if (wait) 6288bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6289bda32530STheodore Ts'o target); 62900390131bSFrank Mayhar } 6291bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6292bda32530STheodore Ts'o needs_barrier = true; 629306a407f1SDmitry Monakhov if (needs_barrier) { 629406a407f1SDmitry Monakhov int err; 6295c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 629606a407f1SDmitry Monakhov if (!ret) 629706a407f1SDmitry Monakhov ret = err; 629806a407f1SDmitry Monakhov } 629906a407f1SDmitry Monakhov 630006a407f1SDmitry Monakhov return ret; 630106a407f1SDmitry Monakhov } 630206a407f1SDmitry Monakhov 6303ac27a0ecSDave Kleikamp /* 6304ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6305ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6306be4f27d3SYongqiang Yang * 6307be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 63088e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 63098e8ad8a5SJan Kara * modifications. 6310ac27a0ecSDave Kleikamp */ 6311c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6312ac27a0ecSDave Kleikamp { 6313c4be0c1dSTakashi Sato int error = 0; 6314c4be0c1dSTakashi Sato journal_t *journal; 6315ac27a0ecSDave Kleikamp 6316bc98a42cSDavid Howells if (sb_rdonly(sb)) 63179ca92389STheodore Ts'o return 0; 63189ca92389STheodore Ts'o 6319c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6320ac27a0ecSDave Kleikamp 6321bb044576STheodore Ts'o if (journal) { 6322ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6323dab291afSMingming Cao jbd2_journal_lock_updates(journal); 63247ffe1ea8SHidehiro Kawai 63257ffe1ea8SHidehiro Kawai /* 6326bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6327bb044576STheodore Ts'o * flush the journal. 63287ffe1ea8SHidehiro Kawai */ 632901d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 63306b0310fbSEric Sandeen if (error < 0) 63316b0310fbSEric Sandeen goto out; 6332ac27a0ecSDave Kleikamp 6333ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6334e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 633502f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 633602f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6337c642dc9eSEric Sandeen } 6338c642dc9eSEric Sandeen 63394392fbc4SJan Kara error = ext4_commit_super(sb); 63406b0310fbSEric Sandeen out: 6341bb044576STheodore Ts'o if (journal) 63428e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6343bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 63446b0310fbSEric Sandeen return error; 6345ac27a0ecSDave Kleikamp } 6346ac27a0ecSDave Kleikamp 6347ac27a0ecSDave Kleikamp /* 6348ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6349ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6350ac27a0ecSDave Kleikamp */ 6351c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6352ac27a0ecSDave Kleikamp { 6353bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 63549ca92389STheodore Ts'o return 0; 63559ca92389STheodore Ts'o 6356c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 63579ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6358e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 635902f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 636002f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6361c642dc9eSEric Sandeen } 6362c642dc9eSEric Sandeen 63634392fbc4SJan Kara ext4_commit_super(sb); 6364c4be0c1dSTakashi Sato return 0; 6365ac27a0ecSDave Kleikamp } 6366ac27a0ecSDave Kleikamp 6367673c6100STheodore Ts'o /* 6368673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6369673c6100STheodore Ts'o */ 6370673c6100STheodore Ts'o struct ext4_mount_options { 6371673c6100STheodore Ts'o unsigned long s_mount_opt; 6372a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 637308cefc7aSEric W. Biederman kuid_t s_resuid; 637408cefc7aSEric W. Biederman kgid_t s_resgid; 6375673c6100STheodore Ts'o unsigned long s_commit_interval; 6376673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6377673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6378673c6100STheodore Ts'o int s_jquota_fmt; 6379a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6380673c6100STheodore Ts'o #endif 6381673c6100STheodore Ts'o }; 6382673c6100STheodore Ts'o 6383960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6384ac27a0ecSDave Kleikamp { 63857edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6386617ba13bSMingming Cao struct ext4_super_block *es; 6387617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6388960e0ab6SLukas Czerner unsigned long old_sb_flags; 6389617ba13bSMingming Cao struct ext4_mount_options old_opts; 63908a266467STheodore Ts'o ext4_group_t g; 6391c5e06d10SJohann Lombardi int err = 0; 6392ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 63933bbef91bSAustin Kim int enable_quota = 0; 639403dafb5fSChen Gang int i, j; 639533458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6396ac27a0ecSDave Kleikamp #endif 6397b237e304SHarshad Shirwadkar 639821ac738eSChengguang Xu 6399ac27a0ecSDave Kleikamp /* Store the original options */ 6400ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6401ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6402a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6403ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6404ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6405ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 640630773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 640730773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6408ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6409ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6410a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 641103dafb5fSChen Gang if (sbi->s_qf_names[i]) { 641233458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 641333458eabSTheodore Ts'o 641433458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 641503dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 641603dafb5fSChen Gang for (j = 0; j < i; j++) 641703dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 641803dafb5fSChen Gang return -ENOMEM; 641903dafb5fSChen Gang } 642003dafb5fSChen Gang } else 642103dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6422ac27a0ecSDave Kleikamp #endif 6423e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6424b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 64257edfd85bSLukas Czerner ctx->journal_ioprio = 6426b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6427e4e58e5dSOjaswin Mujoo else 6428e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6429e4e58e5dSOjaswin Mujoo 6430e4e58e5dSOjaswin Mujoo } 6431ac27a0ecSDave Kleikamp 64327edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6433ac27a0ecSDave Kleikamp 64346b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 64356b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 64366b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 64372d5b86e0SEric Sandeen "during remount not supported; ignoring"); 64382d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6439c6d3d56dSDarrick J. Wong } 6440c6d3d56dSDarrick J. Wong 64416ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 64426ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 64436ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64446ae6514bSPiotr Sarna "both data=journal and delalloc"); 64456ae6514bSPiotr Sarna err = -EINVAL; 64466ae6514bSPiotr Sarna goto restore_opts; 64476ae6514bSPiotr Sarna } 64486ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 64496ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64506ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 64516ae6514bSPiotr Sarna err = -EINVAL; 64526ae6514bSPiotr Sarna goto restore_opts; 64536ae6514bSPiotr Sarna } 6454ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6455ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6456ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6457ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6458ab04df78SJan Kara err = -EINVAL; 6459ab04df78SJan Kara goto restore_opts; 6460ab04df78SJan Kara } 6461923ae0ffSRoss Zwisler } 6462923ae0ffSRoss Zwisler 6463cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6464cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6465cdb7ee4cSTahsin Erdogan err = -EINVAL; 6466cdb7ee4cSTahsin Erdogan goto restore_opts; 6467cdb7ee4cSTahsin Erdogan } 6468cdb7ee4cSTahsin Erdogan 64699b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6470124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6471ac27a0ecSDave Kleikamp 64721751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 64731751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6474ac27a0ecSDave Kleikamp 6475ac27a0ecSDave Kleikamp es = sbi->s_es; 6476ac27a0ecSDave Kleikamp 6477b3881f74STheodore Ts'o if (sbi->s_journal) { 6478617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 64797edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6480b3881f74STheodore Ts'o } 6481ac27a0ecSDave Kleikamp 6482c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6483c92dc856SJan Kara flush_work(&sbi->s_error_work); 6484c92dc856SJan Kara 6485960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 64869b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6487ac27a0ecSDave Kleikamp err = -EROFS; 6488ac27a0ecSDave Kleikamp goto restore_opts; 6489ac27a0ecSDave Kleikamp } 6490ac27a0ecSDave Kleikamp 6491960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 649238c03b34STheodore Ts'o err = sync_filesystem(sb); 649338c03b34STheodore Ts'o if (err < 0) 649438c03b34STheodore Ts'o goto restore_opts; 64950f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 64960f0dd62fSChristoph Hellwig if (err < 0) 6497c79d967dSChristoph Hellwig goto restore_opts; 6498c79d967dSChristoph Hellwig 6499ac27a0ecSDave Kleikamp /* 6500ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6501ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6502ac27a0ecSDave Kleikamp */ 65031751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6504ac27a0ecSDave Kleikamp 6505ac27a0ecSDave Kleikamp /* 6506ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6507ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6508ac27a0ecSDave Kleikamp * mark the partition as valid again. 6509ac27a0ecSDave Kleikamp */ 6510617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6511617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6512ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6513ac27a0ecSDave Kleikamp 651411215630SJan Kara if (sbi->s_journal) { 651511215630SJan Kara /* 651611215630SJan Kara * We let remount-ro finish even if marking fs 651711215630SJan Kara * as clean failed... 651811215630SJan Kara */ 6519617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 652011215630SJan Kara } 6521ac27a0ecSDave Kleikamp } else { 6522a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6523e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 65242cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6525ac27a0ecSDave Kleikamp err = -EROFS; 6526ac27a0ecSDave Kleikamp goto restore_opts; 6527ac27a0ecSDave Kleikamp } 6528ead6596bSEric Sandeen /* 65298a266467STheodore Ts'o * Make sure the group descriptor checksums 65300b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 65318a266467STheodore Ts'o */ 65328a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 65338a266467STheodore Ts'o struct ext4_group_desc *gdp = 65348a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 65358a266467STheodore Ts'o 6536feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6537b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6538b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6539e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 65408a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 65416a797d27SDarrick J. Wong err = -EFSBADCRC; 65428a266467STheodore Ts'o goto restore_opts; 65438a266467STheodore Ts'o } 65448a266467STheodore Ts'o } 65458a266467STheodore Ts'o 65468a266467STheodore Ts'o /* 6547ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6548ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6549ead6596bSEric Sandeen * require a full umount/remount for now. 6550ead6596bSEric Sandeen */ 655102f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6552b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6553ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6554ead6596bSEric Sandeen "orphan inode list. Please " 6555b31e1552SEric Sandeen "umount/remount instead"); 6556ead6596bSEric Sandeen err = -EINVAL; 6557ead6596bSEric Sandeen goto restore_opts; 6558ead6596bSEric Sandeen } 6559ead6596bSEric Sandeen 6560ac27a0ecSDave Kleikamp /* 6561ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6562ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6563ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6564ac27a0ecSDave Kleikamp * the partition.) 6565ac27a0ecSDave Kleikamp */ 656611215630SJan Kara if (sbi->s_journal) { 656711215630SJan Kara err = ext4_clear_journal_err(sb, es); 656811215630SJan Kara if (err) 656911215630SJan Kara goto restore_opts; 657011215630SJan Kara } 6571c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6572c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6573c89128a0SJaegeuk Kim 6574c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6575c89128a0SJaegeuk Kim if (err) 6576c89128a0SJaegeuk Kim goto restore_opts; 6577c89128a0SJaegeuk Kim 65781751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 65793b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb)) { 65803b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, 65813b50d501STheodore Ts'o le64_to_cpu(es->s_mmp_block)); 65823b50d501STheodore Ts'o if (err) 6583c5e06d10SJohann Lombardi goto restore_opts; 6584c5e06d10SJohann Lombardi } 65853bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6586c79d967dSChristoph Hellwig enable_quota = 1; 65873bbef91bSAustin Kim #endif 6588ac27a0ecSDave Kleikamp } 6589ac27a0ecSDave Kleikamp } 6590bfff6873SLukas Czerner 6591bfff6873SLukas Czerner /* 6592bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6593bfff6873SLukas Czerner * current settings 6594bfff6873SLukas Czerner */ 6595bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6596bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6597bfff6873SLukas Czerner else { 6598bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6599bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6600bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6601bfff6873SLukas Czerner } 6602bfff6873SLukas Czerner 66030f5bde1dSJan Kara /* 66040f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 66050f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 66060f5bde1dSJan Kara * succeed. 66070f5bde1dSJan Kara */ 6608dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6609d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6610d176b1f6SJan Kara if (err) 6611d176b1f6SJan Kara goto restore_opts; 66120f5bde1dSJan Kara } 6613d176b1f6SJan Kara 6614c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 66154392fbc4SJan Kara err = ext4_commit_super(sb); 6616c89128a0SJaegeuk Kim if (err) 6617c89128a0SJaegeuk Kim goto restore_opts; 6618c89128a0SJaegeuk Kim } 66190390131bSFrank Mayhar 6620ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6621ac27a0ecSDave Kleikamp /* Release old quota file names */ 6622a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6623ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 66247c319d32SAditya Kali if (enable_quota) { 66257c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 66260f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6627e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 66287c319d32SAditya Kali err = ext4_enable_quotas(sb); 662907724f98STheodore Ts'o if (err) 66307c319d32SAditya Kali goto restore_opts; 66317c319d32SAditya Kali } 66327c319d32SAditya Kali } 66337c319d32SAditya Kali #endif 6634dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66350f5bde1dSJan Kara ext4_release_system_zone(sb); 6636d4c402d9SCurt Wohlgemuth 663761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 663861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 663961bb4a1cSTheodore Ts'o 6640ac27a0ecSDave Kleikamp return 0; 66410b8e58a1SAndreas Dilger 6642ac27a0ecSDave Kleikamp restore_opts: 6643ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6644ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6645a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6646ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6647ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6648ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 664930773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 665030773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6651dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66520f5bde1dSJan Kara ext4_release_system_zone(sb); 6653ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6654ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6655a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 665633458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 665733458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6658ac27a0ecSDave Kleikamp } 665933458eabSTheodore Ts'o synchronize_rcu(); 666033458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 666133458eabSTheodore Ts'o kfree(to_free[i]); 6662ac27a0ecSDave Kleikamp #endif 666361bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 666461bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6665ac27a0ecSDave Kleikamp return err; 6666ac27a0ecSDave Kleikamp } 6667ac27a0ecSDave Kleikamp 6668cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 66697edfd85bSLukas Czerner { 6670cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 66717edfd85bSLukas Czerner int ret; 66727edfd85bSLukas Czerner 6673cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 66747edfd85bSLukas Czerner 6675cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 66767edfd85bSLukas Czerner if (ret < 0) 66777edfd85bSLukas Czerner return ret; 6678cebe85d5SLukas Czerner 6679960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6680cebe85d5SLukas Czerner if (ret < 0) 6681cebe85d5SLukas Czerner return ret; 6682cebe85d5SLukas Czerner 6683bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted %pU. Quota mode: %s.", 6684bb0fbc78SLukas Czerner &sb->s_uuid, ext4_quota_mode(sb)); 6685cebe85d5SLukas Czerner 6686cebe85d5SLukas Czerner return 0; 66877edfd85bSLukas Czerner } 66887edfd85bSLukas Czerner 6689689c958cSLi Xi #ifdef CONFIG_QUOTA 6690689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6691689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6692689c958cSLi Xi { 6693689c958cSLi Xi struct kqid qid; 6694689c958cSLi Xi struct dquot *dquot; 6695689c958cSLi Xi u64 limit; 6696689c958cSLi Xi u64 curblock; 6697689c958cSLi Xi 6698689c958cSLi Xi qid = make_kqid_projid(projid); 6699689c958cSLi Xi dquot = dqget(sb, qid); 6700689c958cSLi Xi if (IS_ERR(dquot)) 6701689c958cSLi Xi return PTR_ERR(dquot); 67027b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6703689c958cSLi Xi 6704a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6705a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 670657c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 670757c32ea4SChengguang Xu 6708689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6709f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6710f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6711689c958cSLi Xi buf->f_blocks = limit; 6712689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6713689c958cSLi Xi (buf->f_blocks > curblock) ? 6714689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6715689c958cSLi Xi } 6716689c958cSLi Xi 6717a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6718a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6719689c958cSLi Xi if (limit && buf->f_files > limit) { 6720689c958cSLi Xi buf->f_files = limit; 6721689c958cSLi Xi buf->f_ffree = 6722689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6723689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6724689c958cSLi Xi } 6725689c958cSLi Xi 67267b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6727689c958cSLi Xi dqput(dquot); 6728689c958cSLi Xi return 0; 6729689c958cSLi Xi } 6730689c958cSLi Xi #endif 6731689c958cSLi Xi 6732617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6733ac27a0ecSDave Kleikamp { 6734ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6735617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6736617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 673727dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6738d02a9391SKazuya Mio s64 bfree; 673927dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6740ac27a0ecSDave Kleikamp 6741952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6742952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6743ac27a0ecSDave Kleikamp 6744617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6745ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6746b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 674757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 674857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6749d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 675057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 675127dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 675227dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 675327dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6754ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6755ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 675652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6757617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 67589591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 67590b8e58a1SAndreas Dilger 6760689c958cSLi Xi #ifdef CONFIG_QUOTA 6761689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6762689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6763689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6764689c958cSLi Xi #endif 6765ac27a0ecSDave Kleikamp return 0; 6766ac27a0ecSDave Kleikamp } 6767ac27a0ecSDave Kleikamp 6768ac27a0ecSDave Kleikamp 6769ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6770ac27a0ecSDave Kleikamp 6771bc8230eeSJan Kara /* 6772bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6773bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6774bc8230eeSJan Kara */ 6775ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6776ac27a0ecSDave Kleikamp { 67774c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6778ac27a0ecSDave Kleikamp } 6779ac27a0ecSDave Kleikamp 6780617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6781ac27a0ecSDave Kleikamp { 6782ac27a0ecSDave Kleikamp int ret, err; 6783ac27a0ecSDave Kleikamp handle_t *handle; 6784ac27a0ecSDave Kleikamp struct inode *inode; 6785ac27a0ecSDave Kleikamp 6786ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 67879924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6788617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6789ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6790ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6791ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6792617ba13bSMingming Cao err = ext4_journal_stop(handle); 6793ac27a0ecSDave Kleikamp if (!ret) 6794ac27a0ecSDave Kleikamp ret = err; 6795ac27a0ecSDave Kleikamp return ret; 6796ac27a0ecSDave Kleikamp } 6797ac27a0ecSDave Kleikamp 6798617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6799ac27a0ecSDave Kleikamp { 6800ac27a0ecSDave Kleikamp int ret, err; 6801ac27a0ecSDave Kleikamp handle_t *handle; 6802ac27a0ecSDave Kleikamp 68039924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6804617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6805ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6806ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6807ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6808617ba13bSMingming Cao err = ext4_journal_stop(handle); 6809ac27a0ecSDave Kleikamp if (!ret) 6810ac27a0ecSDave Kleikamp ret = err; 6811ac27a0ecSDave Kleikamp return ret; 6812ac27a0ecSDave Kleikamp } 6813ac27a0ecSDave Kleikamp 6814617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6815ac27a0ecSDave Kleikamp { 6816ac27a0ecSDave Kleikamp int ret, err; 6817ac27a0ecSDave Kleikamp handle_t *handle; 6818ac27a0ecSDave Kleikamp 68199924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6820617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 68219c3013e9SJan Kara if (IS_ERR(handle)) { 68229c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 68239c3013e9SJan Kara dquot_release(dquot); 6824ac27a0ecSDave Kleikamp return PTR_ERR(handle); 68259c3013e9SJan Kara } 6826ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6827617ba13bSMingming Cao err = ext4_journal_stop(handle); 6828ac27a0ecSDave Kleikamp if (!ret) 6829ac27a0ecSDave Kleikamp ret = err; 6830ac27a0ecSDave Kleikamp return ret; 6831ac27a0ecSDave Kleikamp } 6832ac27a0ecSDave Kleikamp 6833617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6834ac27a0ecSDave Kleikamp { 6835262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6836262b4662SJan Kara 6837f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6838ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6839617ba13bSMingming Cao return ext4_write_dquot(dquot); 6840ac27a0ecSDave Kleikamp } else { 6841ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6842ac27a0ecSDave Kleikamp } 6843ac27a0ecSDave Kleikamp } 6844ac27a0ecSDave Kleikamp 6845617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6846ac27a0ecSDave Kleikamp { 6847ac27a0ecSDave Kleikamp int ret, err; 6848ac27a0ecSDave Kleikamp handle_t *handle; 6849ac27a0ecSDave Kleikamp 6850ac27a0ecSDave Kleikamp /* Data block + inode block */ 6851f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6852ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6853ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6854ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6855617ba13bSMingming Cao err = ext4_journal_stop(handle); 6856ac27a0ecSDave Kleikamp if (!ret) 6857ac27a0ecSDave Kleikamp ret = err; 6858ac27a0ecSDave Kleikamp return ret; 6859ac27a0ecSDave Kleikamp } 6860ac27a0ecSDave Kleikamp 6861daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6862daf647d2STheodore Ts'o { 6863daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6864daf647d2STheodore Ts'o 6865daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6866daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6867daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6868daf647d2STheodore Ts'o * because the name of the lock is set using the 6869daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6870daf647d2STheodore Ts'o */ 6871daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6872daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6873daf647d2STheodore Ts'o } 6874daf647d2STheodore Ts'o 6875ac27a0ecSDave Kleikamp /* 6876ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6877ac27a0ecSDave Kleikamp */ 6878617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 68798c54ca9cSAl Viro const struct path *path) 6880ac27a0ecSDave Kleikamp { 6881ac27a0ecSDave Kleikamp int err; 6882ac27a0ecSDave Kleikamp 6883ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6884ac27a0ecSDave Kleikamp return -EINVAL; 68850623543bSJan Kara 6886ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6887d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6888ac27a0ecSDave Kleikamp return -EXDEV; 6889e0770e91SJan Kara 6890e0770e91SJan Kara /* Quota already enabled for this file? */ 6891e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6892e0770e91SJan Kara return -EBUSY; 6893e0770e91SJan Kara 68940623543bSJan Kara /* Journaling quota? */ 68950623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 68962b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6897f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6898b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6899b31e1552SEric Sandeen "Quota file not on filesystem root. " 6900b31e1552SEric Sandeen "Journaled quota will not work"); 690191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 690291389240SJan Kara } else { 690391389240SJan Kara /* 690491389240SJan Kara * Clear the flag just in case mount options changed since 690591389240SJan Kara * last time. 690691389240SJan Kara */ 690791389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 69080623543bSJan Kara } 69090623543bSJan Kara 6910daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6911daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 691215fc69bbSJan Kara if (!err) { 6913957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6914957153fcSJan Kara handle_t *handle; 6915957153fcSJan Kara 691661a92987SJan Kara /* 691761a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 691861a92987SJan Kara * files. If this fails, we return success anyway since quotas 691961a92987SJan Kara * are already enabled and this is not a hard failure. 692061a92987SJan Kara */ 6921957153fcSJan Kara inode_lock(inode); 6922957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6923957153fcSJan Kara if (IS_ERR(handle)) 6924957153fcSJan Kara goto unlock_inode; 6925957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6926957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6927957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 69284209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6929957153fcSJan Kara ext4_journal_stop(handle); 6930957153fcSJan Kara unlock_inode: 6931957153fcSJan Kara inode_unlock(inode); 693215fc69bbSJan Kara if (err) 693315fc69bbSJan Kara dquot_quota_off(sb, type); 6934957153fcSJan Kara } 693515fc69bbSJan Kara if (err) 693615fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 693715fc69bbSJan Kara I_DATA_SEM_NORMAL); 6938daf647d2STheodore Ts'o return err; 6939ac27a0ecSDave Kleikamp } 6940ac27a0ecSDave Kleikamp 694107342ec2SBaokun Li static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum) 694207342ec2SBaokun Li { 694307342ec2SBaokun Li switch (type) { 694407342ec2SBaokun Li case USRQUOTA: 694507342ec2SBaokun Li return qf_inum == EXT4_USR_QUOTA_INO; 694607342ec2SBaokun Li case GRPQUOTA: 694707342ec2SBaokun Li return qf_inum == EXT4_GRP_QUOTA_INO; 694807342ec2SBaokun Li case PRJQUOTA: 694907342ec2SBaokun Li return qf_inum >= EXT4_GOOD_OLD_FIRST_INO; 695007342ec2SBaokun Li default: 695107342ec2SBaokun Li BUG(); 695207342ec2SBaokun Li } 695307342ec2SBaokun Li } 695407342ec2SBaokun Li 69557c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 69567c319d32SAditya Kali unsigned int flags) 69577c319d32SAditya Kali { 69587c319d32SAditya Kali int err; 69597c319d32SAditya Kali struct inode *qf_inode; 6960a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69617c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6962689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6963689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69647c319d32SAditya Kali }; 69657c319d32SAditya Kali 6966e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 69677c319d32SAditya Kali 69687c319d32SAditya Kali if (!qf_inums[type]) 69697c319d32SAditya Kali return -EPERM; 69707c319d32SAditya Kali 697107342ec2SBaokun Li if (!ext4_check_quota_inum(type, qf_inums[type])) { 697207342ec2SBaokun Li ext4_error(sb, "Bad quota inum: %lu, type: %d", 697307342ec2SBaokun Li qf_inums[type], type); 697407342ec2SBaokun Li return -EUCLEAN; 697507342ec2SBaokun Li } 697607342ec2SBaokun Li 69778a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 69787c319d32SAditya Kali if (IS_ERR(qf_inode)) { 697907342ec2SBaokun Li ext4_error(sb, "Bad quota inode: %lu, type: %d", 698007342ec2SBaokun Li qf_inums[type], type); 69817c319d32SAditya Kali return PTR_ERR(qf_inode); 69827c319d32SAditya Kali } 69837c319d32SAditya Kali 6984bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6985bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6986daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 69877212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6988daf647d2STheodore Ts'o if (err) 6989daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 699061157b24SPan Bian iput(qf_inode); 69917c319d32SAditya Kali 69927c319d32SAditya Kali return err; 69937c319d32SAditya Kali } 69947c319d32SAditya Kali 69957c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 699625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 69977c319d32SAditya Kali { 69987c319d32SAditya Kali int type, err = 0; 6999a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 70007c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 7001689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 7002689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 70037c319d32SAditya Kali }; 700449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 700549da9392SJan Kara test_opt(sb, USRQUOTA), 700649da9392SJan Kara test_opt(sb, GRPQUOTA), 700749da9392SJan Kara test_opt(sb, PRJQUOTA), 700849da9392SJan Kara }; 70097c319d32SAditya Kali 701091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 7011a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 70127c319d32SAditya Kali if (qf_inums[type]) { 70137c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 701449da9392SJan Kara DQUOT_USAGE_ENABLED | 701549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 70167c319d32SAditya Kali if (err) { 70177c319d32SAditya Kali ext4_warning(sb, 701872ba7450STheodore Ts'o "Failed to enable quota tracking " 701907342ec2SBaokun Li "(type=%d, err=%d, ino=%lu). " 702007342ec2SBaokun Li "Please run e2fsck to fix.", type, 702107342ec2SBaokun Li err, qf_inums[type]); 70224013d47aSJan Kara for (type--; type >= 0; type--) { 70234013d47aSJan Kara struct inode *inode; 70244013d47aSJan Kara 70254013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 70264013d47aSJan Kara if (inode) 70274013d47aSJan Kara inode = igrab(inode); 70287f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 70294013d47aSJan Kara if (inode) { 70304013d47aSJan Kara lockdep_set_quota_inode(inode, 70314013d47aSJan Kara I_DATA_SEM_NORMAL); 70324013d47aSJan Kara iput(inode); 70334013d47aSJan Kara } 70344013d47aSJan Kara } 70357f144fd0SJunichi Uekawa 70367c319d32SAditya Kali return err; 70377c319d32SAditya Kali } 70387c319d32SAditya Kali } 70397c319d32SAditya Kali } 70407c319d32SAditya Kali return 0; 70417c319d32SAditya Kali } 70427c319d32SAditya Kali 7043ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 7044ca0e05e4SDmitry Monakhov { 704521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 704621f97697SJan Kara handle_t *handle; 7047957153fcSJan Kara int err; 704821f97697SJan Kara 704987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 705087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 705187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 7052ca0e05e4SDmitry Monakhov sync_filesystem(sb); 7053ca0e05e4SDmitry Monakhov 7054957153fcSJan Kara if (!inode || !igrab(inode)) 70550b268590SAmir Goldstein goto out; 70560b268590SAmir Goldstein 7057957153fcSJan Kara err = dquot_quota_off(sb, type); 7058964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 7059957153fcSJan Kara goto out_put; 7060957153fcSJan Kara 7061957153fcSJan Kara inode_lock(inode); 706261a92987SJan Kara /* 706361a92987SJan Kara * Update modification times of quota files when userspace can 706461a92987SJan Kara * start looking at them. If we fail, we return success anyway since 706561a92987SJan Kara * this is not a hard failure and quotas are already disabled. 706661a92987SJan Kara */ 70679924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 70684209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 70694209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7070957153fcSJan Kara goto out_unlock; 70714209ae12SHarshad Shirwadkar } 7072957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7073957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 7074eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 70754209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 707621f97697SJan Kara ext4_journal_stop(handle); 7077957153fcSJan Kara out_unlock: 7078957153fcSJan Kara inode_unlock(inode); 7079957153fcSJan Kara out_put: 7080964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7081957153fcSJan Kara iput(inode); 7082957153fcSJan Kara return err; 708321f97697SJan Kara out: 7084ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7085ca0e05e4SDmitry Monakhov } 7086ca0e05e4SDmitry Monakhov 7087ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7088ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7089ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7090ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7091617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7092ac27a0ecSDave Kleikamp size_t len, loff_t off) 7093ac27a0ecSDave Kleikamp { 7094ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7095725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7096ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7097ac27a0ecSDave Kleikamp int tocopy; 7098ac27a0ecSDave Kleikamp size_t toread; 7099ac27a0ecSDave Kleikamp struct buffer_head *bh; 7100ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7101ac27a0ecSDave Kleikamp 7102ac27a0ecSDave Kleikamp if (off > i_size) 7103ac27a0ecSDave Kleikamp return 0; 7104ac27a0ecSDave Kleikamp if (off+len > i_size) 7105ac27a0ecSDave Kleikamp len = i_size-off; 7106ac27a0ecSDave Kleikamp toread = len; 7107ac27a0ecSDave Kleikamp while (toread > 0) { 710866267814SJiangshan Yi tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 71091c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 71101c215028STheodore Ts'o if (IS_ERR(bh)) 71111c215028STheodore Ts'o return PTR_ERR(bh); 7112ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7113ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7114ac27a0ecSDave Kleikamp else 7115ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7116ac27a0ecSDave Kleikamp brelse(bh); 7117ac27a0ecSDave Kleikamp offset = 0; 7118ac27a0ecSDave Kleikamp toread -= tocopy; 7119ac27a0ecSDave Kleikamp data += tocopy; 7120ac27a0ecSDave Kleikamp blk++; 7121ac27a0ecSDave Kleikamp } 7122ac27a0ecSDave Kleikamp return len; 7123ac27a0ecSDave Kleikamp } 7124ac27a0ecSDave Kleikamp 7125ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7126ac27a0ecSDave Kleikamp * enough credits) */ 7127617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7128ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7129ac27a0ecSDave Kleikamp { 7130ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7131725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 71324209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7133c5e298aeSTheodore Ts'o int retries = 0; 7134ac27a0ecSDave Kleikamp struct buffer_head *bh; 7135ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7136ac27a0ecSDave Kleikamp 7137380a0091SYe Bin if (!handle) { 7138b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7139b31e1552SEric Sandeen " cancelled because transaction is not started", 71409c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 71419c3013e9SJan Kara return -EIO; 71429c3013e9SJan Kara } 714367eeb568SDmitry Monakhov /* 714467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 714567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 714667eeb568SDmitry Monakhov */ 714767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 714867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 714967eeb568SDmitry Monakhov " cancelled because not block aligned", 715067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 715167eeb568SDmitry Monakhov return -EIO; 715267eeb568SDmitry Monakhov } 715367eeb568SDmitry Monakhov 7154c5e298aeSTheodore Ts'o do { 7155c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7156c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7157c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 715845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7159c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 71601c215028STheodore Ts'o if (IS_ERR(bh)) 71611c215028STheodore Ts'o return PTR_ERR(bh); 7162ac27a0ecSDave Kleikamp if (!bh) 7163ac27a0ecSDave Kleikamp goto out; 71645d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7165188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7166ac27a0ecSDave Kleikamp if (err) { 7167ac27a0ecSDave Kleikamp brelse(bh); 71681c215028STheodore Ts'o return err; 7169ac27a0ecSDave Kleikamp } 7170ac27a0ecSDave Kleikamp lock_buffer(bh); 717167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7172ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7173ac27a0ecSDave Kleikamp unlock_buffer(bh); 71740390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7175ac27a0ecSDave Kleikamp brelse(bh); 7176ac27a0ecSDave Kleikamp out: 717767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 717867eeb568SDmitry Monakhov i_size_write(inode, off + len); 7179617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 71804209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 71814209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 71824209ae12SHarshad Shirwadkar err = err2; 718321f97697SJan Kara } 71844209ae12SHarshad Shirwadkar return err ? err : len; 7185ac27a0ecSDave Kleikamp } 7186ac27a0ecSDave Kleikamp #endif 7187ac27a0ecSDave Kleikamp 7188c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 718924b58424STheodore Ts'o static inline void register_as_ext2(void) 719024b58424STheodore Ts'o { 719124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 719224b58424STheodore Ts'o if (err) 719324b58424STheodore Ts'o printk(KERN_WARNING 719424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 719524b58424STheodore Ts'o } 719624b58424STheodore Ts'o 719724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 719824b58424STheodore Ts'o { 719924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 720024b58424STheodore Ts'o } 72012035e776STheodore Ts'o 72022035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 72032035e776STheodore Ts'o { 7204e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 72052035e776STheodore Ts'o return 0; 7206bc98a42cSDavid Howells if (sb_rdonly(sb)) 72072035e776STheodore Ts'o return 1; 7208e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 72092035e776STheodore Ts'o return 0; 72102035e776STheodore Ts'o return 1; 72112035e776STheodore Ts'o } 721224b58424STheodore Ts'o #else 721324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 721424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 72152035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 721624b58424STheodore Ts'o #endif 721724b58424STheodore Ts'o 721824b58424STheodore Ts'o static inline void register_as_ext3(void) 721924b58424STheodore Ts'o { 722024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 722124b58424STheodore Ts'o if (err) 722224b58424STheodore Ts'o printk(KERN_WARNING 722324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 722424b58424STheodore Ts'o } 722524b58424STheodore Ts'o 722624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 722724b58424STheodore Ts'o { 722824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 722924b58424STheodore Ts'o } 72302035e776STheodore Ts'o 72312035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 72322035e776STheodore Ts'o { 7233e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 72342035e776STheodore Ts'o return 0; 7235e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 72362035e776STheodore Ts'o return 0; 7237bc98a42cSDavid Howells if (sb_rdonly(sb)) 72382035e776STheodore Ts'o return 1; 7239e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 72402035e776STheodore Ts'o return 0; 72412035e776STheodore Ts'o return 1; 72422035e776STheodore Ts'o } 724324b58424STheodore Ts'o 724403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7245ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 724603010a33STheodore Ts'o .name = "ext4", 7247cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7248cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7249ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 725014f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7251ac27a0ecSDave Kleikamp }; 72527f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7253ac27a0ecSDave Kleikamp 7254e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7255e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7256e9e3bcecSEric Sandeen 72575dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7258ac27a0ecSDave Kleikamp { 7259e9e3bcecSEric Sandeen int i, err; 7260c9de560dSAlex Tomas 7261e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 726207c0c5d8SAl Viro ext4_li_info = NULL; 726307c0c5d8SAl Viro 72649a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 726512e9b892SDmitry Monakhov ext4_check_flag_values(); 7266e9e3bcecSEric Sandeen 7267e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7268e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7269e9e3bcecSEric Sandeen 727051865fdaSZheng Liu err = ext4_init_es(); 72716fd058f7STheodore Ts'o if (err) 72726fd058f7STheodore Ts'o return err; 727351865fdaSZheng Liu 72741dc0aa46SEric Whitney err = ext4_init_pending(); 72751dc0aa46SEric Whitney if (err) 727622cfe4b4SEric Biggers goto out7; 727722cfe4b4SEric Biggers 727822cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 727922cfe4b4SEric Biggers if (err) 72801dc0aa46SEric Whitney goto out6; 72811dc0aa46SEric Whitney 728251865fdaSZheng Liu err = ext4_init_pageio(); 728351865fdaSZheng Liu if (err) 7284b5799018STheodore Ts'o goto out5; 728551865fdaSZheng Liu 72865dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7287bd2d0210STheodore Ts'o if (err) 7288b5799018STheodore Ts'o goto out4; 7289857ac889SLukas Czerner 7290b5799018STheodore Ts'o err = ext4_init_sysfs(); 7291dd68314cSTheodore Ts'o if (err) 7292b5799018STheodore Ts'o goto out3; 7293857ac889SLukas Czerner 72945dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7295ac27a0ecSDave Kleikamp if (err) 7296c9de560dSAlex Tomas goto out2; 7297ac27a0ecSDave Kleikamp err = init_inodecache(); 7298ac27a0ecSDave Kleikamp if (err) 7299ac27a0ecSDave Kleikamp goto out1; 7300aa75f4d3SHarshad Shirwadkar 7301aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7302aa75f4d3SHarshad Shirwadkar if (err) 7303aa75f4d3SHarshad Shirwadkar goto out05; 7304aa75f4d3SHarshad Shirwadkar 730524b58424STheodore Ts'o register_as_ext3(); 73062035e776STheodore Ts'o register_as_ext2(); 730703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7308ac27a0ecSDave Kleikamp if (err) 7309ac27a0ecSDave Kleikamp goto out; 7310bfff6873SLukas Czerner 7311ac27a0ecSDave Kleikamp return 0; 7312ac27a0ecSDave Kleikamp out: 731324b58424STheodore Ts'o unregister_as_ext2(); 731424b58424STheodore Ts'o unregister_as_ext3(); 7315ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7316aa75f4d3SHarshad Shirwadkar out05: 7317ac27a0ecSDave Kleikamp destroy_inodecache(); 7318ac27a0ecSDave Kleikamp out1: 73195dabfc78STheodore Ts'o ext4_exit_mballoc(); 73209c191f70ST Makphaibulchoke out2: 7321b5799018STheodore Ts'o ext4_exit_sysfs(); 7322b5799018STheodore Ts'o out3: 7323dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7324b5799018STheodore Ts'o out4: 73255dabfc78STheodore Ts'o ext4_exit_pageio(); 7326b5799018STheodore Ts'o out5: 732722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 73281dc0aa46SEric Whitney out6: 732922cfe4b4SEric Biggers ext4_exit_pending(); 733022cfe4b4SEric Biggers out7: 733151865fdaSZheng Liu ext4_exit_es(); 733251865fdaSZheng Liu 7333ac27a0ecSDave Kleikamp return err; 7334ac27a0ecSDave Kleikamp } 7335ac27a0ecSDave Kleikamp 73365dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7337ac27a0ecSDave Kleikamp { 7338bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 733924b58424STheodore Ts'o unregister_as_ext2(); 734024b58424STheodore Ts'o unregister_as_ext3(); 734103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7342ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7343ac27a0ecSDave Kleikamp destroy_inodecache(); 73445dabfc78STheodore Ts'o ext4_exit_mballoc(); 7345b5799018STheodore Ts'o ext4_exit_sysfs(); 73465dabfc78STheodore Ts'o ext4_exit_system_zone(); 73475dabfc78STheodore Ts'o ext4_exit_pageio(); 734822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7349dd12ed14SEric Sandeen ext4_exit_es(); 73501dc0aa46SEric Whitney ext4_exit_pending(); 7351ac27a0ecSDave Kleikamp } 7352ac27a0ecSDave Kleikamp 7353ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 735483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7355ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 73567ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 73575dabfc78STheodore Ts'o module_init(ext4_init_fs) 73585dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7359