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 10519af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10529af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10539af0b3d1SWang Shilong &grp->bb_state); 10549af0b3d1SWang Shilong if (!ret) 1055db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1056db79e6d1SWang Shilong grp->bb_free); 1057db79e6d1SWang Shilong } 1058db79e6d1SWang Shilong 10599af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10609af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10619af0b3d1SWang Shilong &grp->bb_state); 10629af0b3d1SWang Shilong if (!ret && gdp) { 1063db79e6d1SWang Shilong int count; 1064db79e6d1SWang Shilong 1065db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1066db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1067db79e6d1SWang Shilong count); 1068db79e6d1SWang Shilong } 1069db79e6d1SWang Shilong } 1070db79e6d1SWang Shilong } 1071db79e6d1SWang Shilong 1072617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1073ac27a0ecSDave Kleikamp { 1074617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1075ac27a0ecSDave Kleikamp 1076617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1077ac27a0ecSDave Kleikamp return; 1078ac27a0ecSDave Kleikamp 107912062dddSEric Sandeen ext4_warning(sb, 1080ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1081ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1082617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1083ac27a0ecSDave Kleikamp 1084617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1085617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1086617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1087ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1088ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1089ac27a0ecSDave Kleikamp 1090ac27a0ecSDave Kleikamp /* 1091ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1092ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1093ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1094ac27a0ecSDave Kleikamp */ 1095ac27a0ecSDave Kleikamp } 1096ac27a0ecSDave Kleikamp 1097ac27a0ecSDave Kleikamp /* 1098ac27a0ecSDave Kleikamp * Open the external journal device 1099ac27a0ecSDave Kleikamp */ 1100b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1101ac27a0ecSDave Kleikamp { 1102ac27a0ecSDave Kleikamp struct block_device *bdev; 1103ac27a0ecSDave Kleikamp 1104d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1105ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1106ac27a0ecSDave Kleikamp goto fail; 1107ac27a0ecSDave Kleikamp return bdev; 1108ac27a0ecSDave Kleikamp 1109ac27a0ecSDave Kleikamp fail: 1110ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1111ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1112ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1113ac27a0ecSDave Kleikamp return NULL; 1114ac27a0ecSDave Kleikamp } 1115ac27a0ecSDave Kleikamp 1116ac27a0ecSDave Kleikamp /* 1117ac27a0ecSDave Kleikamp * Release the journal device 1118ac27a0ecSDave Kleikamp */ 11194385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1120ac27a0ecSDave Kleikamp { 11214385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1122ac27a0ecSDave Kleikamp } 1123ac27a0ecSDave Kleikamp 11244385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1125ac27a0ecSDave Kleikamp { 1126ac27a0ecSDave Kleikamp struct block_device *bdev; 1127ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1128ac27a0ecSDave Kleikamp if (bdev) { 11294385bab1SAl Viro ext4_blkdev_put(bdev); 1130ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1131ac27a0ecSDave Kleikamp } 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp 1134ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1135ac27a0ecSDave Kleikamp { 1136617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1137ac27a0ecSDave Kleikamp } 1138ac27a0ecSDave Kleikamp 1139617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1140ac27a0ecSDave Kleikamp { 1141ac27a0ecSDave Kleikamp struct list_head *l; 1142ac27a0ecSDave Kleikamp 1143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1144ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1145ac27a0ecSDave Kleikamp 1146ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1147ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1148ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1149ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1150ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1151ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1152ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1153ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1154ac27a0ecSDave Kleikamp } 1155ac27a0ecSDave Kleikamp } 1156ac27a0ecSDave Kleikamp 1157957153fcSJan Kara #ifdef CONFIG_QUOTA 1158957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1159957153fcSJan Kara 1160957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1161957153fcSJan Kara { 1162957153fcSJan Kara int type; 1163957153fcSJan Kara 1164957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1165957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1166957153fcSJan Kara ext4_quota_off(sb, type); 1167957153fcSJan Kara } 116833458eabSTheodore Ts'o 116933458eabSTheodore Ts'o /* 117033458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117133458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117233458eabSTheodore Ts'o */ 117333458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 117433458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117533458eabSTheodore Ts'o int type) 117633458eabSTheodore Ts'o { 117733458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 117833458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 117933458eabSTheodore Ts'o } 1180957153fcSJan Kara #else 1181957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1182957153fcSJan Kara { 1183957153fcSJan Kara } 1184957153fcSJan Kara #endif 1185957153fcSJan Kara 11861f79467cSJason Yan static int ext4_percpu_param_init(struct ext4_sb_info *sbi) 11871f79467cSJason Yan { 11881f79467cSJason Yan ext4_fsblk_t block; 11891f79467cSJason Yan int err; 11901f79467cSJason Yan 11911f79467cSJason Yan block = ext4_count_free_clusters(sbi->s_sb); 11921f79467cSJason Yan ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); 11931f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 11941f79467cSJason Yan GFP_KERNEL); 11951f79467cSJason Yan if (!err) { 11961f79467cSJason Yan unsigned long freei = ext4_count_free_inodes(sbi->s_sb); 11971f79467cSJason Yan sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 11981f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 11991f79467cSJason Yan GFP_KERNEL); 12001f79467cSJason Yan } 12011f79467cSJason Yan if (!err) 12021f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirs_counter, 12031f79467cSJason Yan ext4_count_dirs(sbi->s_sb), GFP_KERNEL); 12041f79467cSJason Yan if (!err) 12051f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 12061f79467cSJason Yan GFP_KERNEL); 12071f79467cSJason Yan if (!err) 12081f79467cSJason Yan err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 12091f79467cSJason Yan GFP_KERNEL); 12101f79467cSJason Yan if (!err) 12111f79467cSJason Yan err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 12121f79467cSJason Yan 12131f79467cSJason Yan if (err) 12141f79467cSJason Yan ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory"); 12151f79467cSJason Yan 12161f79467cSJason Yan return err; 12171f79467cSJason Yan } 12181f79467cSJason Yan 12191f79467cSJason Yan static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi) 12201f79467cSJason Yan { 12211f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeclusters_counter); 12221f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeinodes_counter); 12231f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirs_counter); 12241f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 12251f79467cSJason Yan percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 12261f79467cSJason Yan percpu_free_rwsem(&sbi->s_writepages_rwsem); 12271f79467cSJason Yan } 12281f79467cSJason Yan 1229*6ef68498SJason Yan static void ext4_group_desc_free(struct ext4_sb_info *sbi) 1230*6ef68498SJason Yan { 1231*6ef68498SJason Yan struct buffer_head **group_desc; 1232*6ef68498SJason Yan int i; 1233*6ef68498SJason Yan 1234*6ef68498SJason Yan rcu_read_lock(); 1235*6ef68498SJason Yan group_desc = rcu_dereference(sbi->s_group_desc); 1236*6ef68498SJason Yan for (i = 0; i < sbi->s_gdb_count; i++) 1237*6ef68498SJason Yan brelse(group_desc[i]); 1238*6ef68498SJason Yan kvfree(group_desc); 1239*6ef68498SJason Yan rcu_read_unlock(); 1240*6ef68498SJason Yan } 1241*6ef68498SJason Yan 1242617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1243ac27a0ecSDave Kleikamp { 1244617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1245617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 12467c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 124797abd7d4STheodore Ts'o int aborted = 0; 1248ef2cabf7SHidehiro Kawai int i, err; 1249ac27a0ecSDave Kleikamp 1250b98535d0SYe Bin /* 1251b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1252b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1253b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1254b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1255b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1256b98535d0SYe Bin * read metadata verify failed then will queue error work. 1257b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1258b98535d0SYe Bin * BUG_ON. 1259b98535d0SYe Bin */ 1260b98535d0SYe Bin ext4_unregister_sysfs(sb); 1261b98535d0SYe Bin 12624808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 1263bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", 1264bb0fbc78SLukas Czerner &sb->s_uuid); 12654808cb5bSZhang Yi 1266857ac889SLukas Czerner ext4_unregister_li_request(sb); 1267957153fcSJan Kara ext4_quota_off_umount(sb); 1268e0ccfd95SChristoph Hellwig 1269c92dc856SJan Kara flush_work(&sbi->s_error_work); 12702e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 127102f310fcSJan Kara ext4_release_orphan_info(sb); 12724c0425ffSMingming Cao 12730390131bSFrank Mayhar if (sbi->s_journal) { 127497abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1275ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 127647b4a50bSJan Kara sbi->s_journal = NULL; 1277878520acSTheodore Ts'o if ((err < 0) && !aborted) { 127854d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12790390131bSFrank Mayhar } 1280878520acSTheodore Ts'o } 1281d4edac31SJosef Bacik 1282d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 1283292a089dSSteven Rostedt (Google) timer_shutdown_sync(&sbi->s_err_report); 1284d4edac31SJosef Bacik ext4_release_system_zone(sb); 1285d4edac31SJosef Bacik ext4_mb_release(sb); 1286d4edac31SJosef Bacik ext4_ext_release(sb); 1287d4edac31SJosef Bacik 1288bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1289e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 129002f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1291ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1292ac27a0ecSDave Kleikamp } 1293bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12944392fbc4SJan Kara ext4_commit_super(sb); 1295a8e25a83SArtem Bityutskiy 1296*6ef68498SJason Yan ext4_group_desc_free(sbi); 12971d0c3924STheodore Ts'o rcu_read_lock(); 12987c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12997c990728SSuraj Jitindar Singh if (flex_groups) { 13007c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 13017c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 13027c990728SSuraj Jitindar Singh kvfree(flex_groups); 13037c990728SSuraj Jitindar Singh } 13041d0c3924STheodore Ts'o rcu_read_unlock(); 13051f79467cSJason Yan ext4_percpu_param_destroy(sbi); 1306ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1307a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 130833458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1309ac27a0ecSDave Kleikamp #endif 1310ac27a0ecSDave Kleikamp 1311ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1312ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1313ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1314ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1315ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1316ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1317837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1318ac27a0ecSDave Kleikamp 131989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1320f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1321ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1322ac27a0ecSDave Kleikamp /* 1323ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1324ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1325ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1326ac27a0ecSDave Kleikamp */ 1327ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1328ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1329617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1330ac27a0ecSDave Kleikamp } 133150c15df6SChengguang Xu 1332dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1333dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 133450c15df6SChengguang Xu 133547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 133647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 133750c15df6SChengguang Xu 1338618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1339618f0031SPavel Skripkin 13409060dd2cSEric Sandeen brelse(sbi->s_sbh); 1341ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13423197ebdbSTheodore Ts'o /* 13433197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13443197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13453197ebdbSTheodore Ts'o */ 13463197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13473197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13480441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13490441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1350705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13518012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1352ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13535298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1354f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1355c83ad55eSGabriel Krisman Bertazi #endif 1356ac27a0ecSDave Kleikamp kfree(sbi); 1357ac27a0ecSDave Kleikamp } 1358ac27a0ecSDave Kleikamp 1359e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1360ac27a0ecSDave Kleikamp 1361ac27a0ecSDave Kleikamp /* 1362ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1363ac27a0ecSDave Kleikamp */ 1364617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1365ac27a0ecSDave Kleikamp { 1366617ba13bSMingming Cao struct ext4_inode_info *ei; 1367ac27a0ecSDave Kleikamp 1368fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1369ac27a0ecSDave Kleikamp if (!ei) 1370ac27a0ecSDave Kleikamp return NULL; 13710b8e58a1SAndreas Dilger 1372ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 13737ea71af9SYe Bin ei->i_flags = 0; 1374202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 137538727786SOjaswin Mujoo ei->i_prealloc_node = RB_ROOT; 137627bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 137738727786SOjaswin Mujoo rwlock_init(&ei->i_prealloc_lock); 13789a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13799a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1380edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1381eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1382edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1383dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1384d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1385d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13861dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1387a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1388a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 138996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1390a9e7f447SDmitry Monakhov #endif 13918aefcd55STheodore Ts'o ei->jinode = NULL; 13922e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1393744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1394b436b9beSJan Kara ei->i_sync_tid = 0; 1395b436b9beSJan Kara ei->i_datasync_tid = 0; 1396e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13972e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1398aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1399aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1400ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1401ac27a0ecSDave Kleikamp } 1402ac27a0ecSDave Kleikamp 14037ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 14047ff9c073STheodore Ts'o { 14057ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 14067ff9c073STheodore Ts'o 140729b3692eSEric Biggers if (!drop) 140829b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 140929b3692eSEric Biggers 14107ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 14117ff9c073STheodore Ts'o return drop; 14127ff9c073STheodore Ts'o } 14137ff9c073STheodore Ts'o 141494053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1415fa0d7e3dSNick Piggin { 14162c58d548SEric Biggers fscrypt_free_inode(inode); 1417aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1418aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1419aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1420aa75f4d3SHarshad Shirwadkar } 1421fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1422fa0d7e3dSNick Piggin } 1423fa0d7e3dSNick Piggin 1424617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1425ac27a0ecSDave Kleikamp { 14269f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1427b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1428b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1429b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 14309f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 14319f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 14329f7dd93dSVasily Averin true); 14339f7dd93dSVasily Averin dump_stack(); 14349f7dd93dSVasily Averin } 14356fed8395SJeffle Xu 14366fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 14376fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 14386fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 14396fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 14406fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1441ac27a0ecSDave Kleikamp } 1442ac27a0ecSDave Kleikamp 144351cc5068SAlexey Dobriyan static void init_once(void *foo) 1444ac27a0ecSDave Kleikamp { 1445c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1446ac27a0ecSDave Kleikamp 1447ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1448ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14490e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1450ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1451aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1452ac27a0ecSDave Kleikamp } 1453ac27a0ecSDave Kleikamp 1454e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1455ac27a0ecSDave Kleikamp { 1456f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1457f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1458f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1459f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1460f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1461f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 146220c2df83SPaul Mundt init_once); 1463617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1464ac27a0ecSDave Kleikamp return -ENOMEM; 1465ac27a0ecSDave Kleikamp return 0; 1466ac27a0ecSDave Kleikamp } 1467ac27a0ecSDave Kleikamp 1468ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1469ac27a0ecSDave Kleikamp { 14708c0a8537SKirill A. Shutemov /* 14718c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14728c0a8537SKirill A. Shutemov * destroy cache. 14738c0a8537SKirill A. Shutemov */ 14748c0a8537SKirill A. Shutemov rcu_barrier(); 1475617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1476ac27a0ecSDave Kleikamp } 1477ac27a0ecSDave Kleikamp 14780930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1479ac27a0ecSDave Kleikamp { 1480aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14810930fcc1SAl Viro invalidate_inode_buffers(inode); 1482dbd5768fSJan Kara clear_inode(inode); 148327bc446eSbrookxu ext4_discard_preallocations(inode, 0); 148451865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1485f4c2d372SJan Kara dquot_drop(inode); 14868aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14878aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14888aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14898aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14908aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14918aefcd55STheodore Ts'o } 14923d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1493c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1494ac27a0ecSDave Kleikamp } 1495ac27a0ecSDave Kleikamp 14961b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14971b961ac0SChristoph Hellwig u64 ino, u32 generation) 1498ac27a0ecSDave Kleikamp { 1499ac27a0ecSDave Kleikamp struct inode *inode; 1500ac27a0ecSDave Kleikamp 15018a363970STheodore Ts'o /* 1502ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1503ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1504ac27a0ecSDave Kleikamp */ 15058a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 15061d1fe1eeSDavid Howells if (IS_ERR(inode)) 15071d1fe1eeSDavid Howells return ERR_CAST(inode); 15081d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1509ac27a0ecSDave Kleikamp iput(inode); 1510ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1511ac27a0ecSDave Kleikamp } 15121b961ac0SChristoph Hellwig 15131b961ac0SChristoph Hellwig return inode; 1514ac27a0ecSDave Kleikamp } 15151b961ac0SChristoph Hellwig 15161b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 15171b961ac0SChristoph Hellwig int fh_len, int fh_type) 15181b961ac0SChristoph Hellwig { 15191b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 15201b961ac0SChristoph Hellwig ext4_nfs_get_inode); 15211b961ac0SChristoph Hellwig } 15221b961ac0SChristoph Hellwig 15231b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 15241b961ac0SChristoph Hellwig int fh_len, int fh_type) 15251b961ac0SChristoph Hellwig { 15261b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 15271b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1528ac27a0ecSDave Kleikamp } 1529ac27a0ecSDave Kleikamp 1530fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1531fde87268STheodore Ts'o { 1532fde87268STheodore Ts'o struct writeback_control wbc = { 1533fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1534fde87268STheodore Ts'o }; 1535fde87268STheodore Ts'o 1536fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1537fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1538fde87268STheodore Ts'o } 1539fde87268STheodore Ts'o 1540ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1541d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1542689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1543ac27a0ecSDave Kleikamp 1544617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1545617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1546617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1547617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1548617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15496f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15508c54ca9cSAl Viro const struct path *path); 1551617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1552ac27a0ecSDave Kleikamp size_t len, loff_t off); 1553617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1554ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15557c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15567c319d32SAditya Kali unsigned int flags); 1557ac27a0ecSDave Kleikamp 155896c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 155996c7e0d9SJan Kara { 156096c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 156196c7e0d9SJan Kara } 156296c7e0d9SJan Kara 156361e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 156460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1565617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1566617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1567617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1568617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1569a5b5ee32SJan Kara .write_info = ext4_write_info, 1570a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1571a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1572040cb378SLi Xi .get_projid = ext4_get_projid, 15737a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1574ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1575ac27a0ecSDave Kleikamp }; 1576ac27a0ecSDave Kleikamp 15770d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1578617ba13bSMingming Cao .quota_on = ext4_quota_on, 1579ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1580287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 15810a240339SJan Kara .get_state = dquot_get_state, 1582287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1583287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 15846332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 15856332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1586ac27a0ecSDave Kleikamp }; 1587ac27a0ecSDave Kleikamp #endif 1588ac27a0ecSDave Kleikamp 1589ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1590617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 159194053139SAl Viro .free_inode = ext4_free_in_core_inode, 1592617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1593617ba13bSMingming Cao .write_inode = ext4_write_inode, 1594617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 15957ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 15960930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1597617ba13bSMingming Cao .put_super = ext4_put_super, 1598617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1599c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1600c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1601617ba13bSMingming Cao .statfs = ext4_statfs, 1602617ba13bSMingming Cao .show_options = ext4_show_options, 1603ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1604617ba13bSMingming Cao .quota_read = ext4_quota_read, 1605617ba13bSMingming Cao .quota_write = ext4_quota_write, 160696c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1607ac27a0ecSDave Kleikamp #endif 1608ac27a0ecSDave Kleikamp }; 1609ac27a0ecSDave Kleikamp 161039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 16111b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16121b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1613617ba13bSMingming Cao .get_parent = ext4_get_parent, 1614fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1615ac27a0ecSDave Kleikamp }; 1616ac27a0ecSDave Kleikamp 1617ac27a0ecSDave Kleikamp enum { 1618ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1619ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 162072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 16212d544ec9SYang Xu Opt_user_xattr, Opt_acl, 162272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1623ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1624ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1625ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16266ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16274f74d15fSEric Biggers Opt_inlinecrypt, 1628ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1629ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16301ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 16319cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1632327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 16334437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 16341449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16355328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1636744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1637fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1638cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 163921175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1640e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16418016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 164299c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16438016e29fSHarshad Shirwadkar #endif 1644ac27a0ecSDave Kleikamp }; 1645ac27a0ecSDave Kleikamp 1646e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1647ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1648ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1649ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1650e5a185c2SLukas Czerner {} 1651e5a185c2SLukas Czerner }; 1652e5a185c2SLukas Czerner 1653e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1654ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1655ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1656ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1657e5a185c2SLukas Czerner {} 1658e5a185c2SLukas Czerner }; 1659e5a185c2SLukas Czerner 1660e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1661e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1662e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1663e5a185c2SLukas Czerner {} 1664e5a185c2SLukas Czerner }; 1665e5a185c2SLukas Czerner 1666e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1667ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1668ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1669ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1670e5a185c2SLukas Czerner {} 1671e5a185c2SLukas Czerner }; 1672e5a185c2SLukas Czerner 1673e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1674e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1675e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1676e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1677e5a185c2SLukas Czerner {} 1678e5a185c2SLukas Czerner }; 1679e5a185c2SLukas Czerner 1680e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1681e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1682e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1683e5a185c2SLukas Czerner 1684e5a185c2SLukas Czerner /* 1685e5a185c2SLukas Czerner * Mount option specification 1686e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1687e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1688e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1689e5a185c2SLukas Czerner * separate for now. 1690e5a185c2SLukas Czerner */ 1691e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1692e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1693e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1694e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1695e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1696e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1697e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1698e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1699e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1700e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1701e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1702e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1703e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1704e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1705e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1706e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1707e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1708e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1709e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1710e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1711e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1712e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1713e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1714e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1715e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1716e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1717e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1718e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1719e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1720e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1721e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1722e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1723e5a185c2SLukas Czerner ext4_param_data_err), 1724e5a185c2SLukas Czerner fsparam_string_empty 1725e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1726e5a185c2SLukas Czerner fsparam_string_empty 1727e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1728e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1729e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1730e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1731e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1732e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1733e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1734e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1735e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1736e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 17371ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1738e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1739e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1740e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1741e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1742e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1743e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1744e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1745e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1746e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1747e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1748e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1749e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1750e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1751e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1752e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1753e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1754e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1755e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1756e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1757e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1758e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1759e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1760e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1761e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1762e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1763e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1764e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1765e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1766e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1767e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1768e5a185c2SLukas Czerner #endif 1769e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1770e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1771e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1772e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1773e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1774e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1775e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1776e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1777e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1778e5a185c2SLukas Czerner Opt_removed), 1779e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1780e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1781e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1782e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1783e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1784e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1785e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1786e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1787e5a185c2SLukas Czerner {} 1788e5a185c2SLukas Czerner }; 1789e5a185c2SLukas Czerner 1790b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1791196e402aSHarshad Shirwadkar 179226092bf5STheodore Ts'o #define MOPT_SET 0x0001 179326092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 179426092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 179526092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 179626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 179726092bf5STheodore Ts'o #define MOPT_Q 0 1798ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 179926092bf5STheodore Ts'o #else 180026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 180126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 180226092bf5STheodore Ts'o #endif 1803ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1804ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18058dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1806ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1807ba2e524dSLukas Czerner #define MOPT_2 0x0100 180826092bf5STheodore Ts'o 180926092bf5STheodore Ts'o static const struct mount_opts { 181026092bf5STheodore Ts'o int token; 181126092bf5STheodore Ts'o int mount_opt; 181226092bf5STheodore Ts'o int flags; 181326092bf5STheodore Ts'o } ext4_mount_opts[] = { 181426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 181526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 181626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 181726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 181826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 181926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 18208dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 18218dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 18228dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 18238dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 182426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 182526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 18268dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 18278dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18288dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 182959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1830327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1831327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1832cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1833c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1834c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 18358dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 18361e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 183726092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18388dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18391e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18408dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1841ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 184226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 184326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 184426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 184526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 184626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1847ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1848ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1849ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1850ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1851ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 185226092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 185326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 185426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 185526092bf5STheodore Ts'o #else 185626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 185726092bf5STheodore Ts'o #endif 185826092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 185926092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 186026092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 186126092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 186226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 186326092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 186426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 186549da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 186649da9392SJan Kara MOPT_SET | MOPT_Q}, 186726092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 186849da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 186949da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1870ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1871ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1872ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1873cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 187421175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 18753d392b26STheodore Ts'o MOPT_SET}, 187699c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 18770f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 18780f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 18798016e29fSHarshad Shirwadkar #endif 188026092bf5STheodore Ts'o {Opt_err, 0, 0} 188126092bf5STheodore Ts'o }; 188226092bf5STheodore Ts'o 18835298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1884c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1885c83ad55eSGabriel Krisman Bertazi __u16 magic; 1886c83ad55eSGabriel Krisman Bertazi char *name; 188749bd03ccSChristoph Hellwig unsigned int version; 1888c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 188949bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1890c83ad55eSGabriel Krisman Bertazi }; 1891c83ad55eSGabriel Krisman Bertazi 1892aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1893aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1894c83ad55eSGabriel Krisman Bertazi { 1895c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1896c83ad55eSGabriel Krisman Bertazi int i; 1897c83ad55eSGabriel Krisman Bertazi 1898c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1899c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1900aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1901c83ad55eSGabriel Krisman Bertazi 1902aa8bf298SChristoph Hellwig return NULL; 1903c83ad55eSGabriel Krisman Bertazi } 1904c83ad55eSGabriel Krisman Bertazi #endif 1905c83ad55eSGabriel Krisman Bertazi 19066e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 19076e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 19086e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 19096e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 19106e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 19116e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 19126e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 19136e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 19146e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 19156e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 19166e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 19176e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 19186e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 19196e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 19206e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 19216e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 19226e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 19237edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 192427b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 19256e47a3ccSLukas Czerner 1926461c3af0SLukas Czerner struct ext4_fs_context { 1927e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 192885456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1929e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 19306e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 19316e47a3ccSLukas Czerner int s_fc_debug_max_replay; 19326e47a3ccSLukas Czerner #endif 19336e47a3ccSLukas Czerner unsigned short qname_spec; 19346e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 19356e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 19366e47a3ccSLukas Czerner unsigned long journal_devnum; 19376e47a3ccSLukas Czerner unsigned long s_commit_interval; 19386e47a3ccSLukas Czerner unsigned long s_stripe; 19396e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19406e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19416e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19426e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19436e47a3ccSLukas Czerner unsigned int journal_ioprio; 19446e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19456e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19466e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19476e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1948e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 1949e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 1950b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19516e47a3ccSLukas Czerner unsigned int spec; 19526e47a3ccSLukas Czerner u32 s_max_batch_time; 19536e47a3ccSLukas Czerner u32 s_min_batch_time; 19546e47a3ccSLukas Czerner kuid_t s_resuid; 19556e47a3ccSLukas Czerner kgid_t s_resgid; 19567edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1957b237e304SHarshad Shirwadkar }; 1958b237e304SHarshad Shirwadkar 1959cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1960cebe85d5SLukas Czerner { 1961cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1962cebe85d5SLukas Czerner int i; 1963cebe85d5SLukas Czerner 1964cebe85d5SLukas Czerner if (!ctx) 1965cebe85d5SLukas Czerner return; 1966cebe85d5SLukas Czerner 1967cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1968cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1969cebe85d5SLukas Czerner 197085456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1971cebe85d5SLukas Czerner kfree(ctx); 1972cebe85d5SLukas Czerner } 1973cebe85d5SLukas Czerner 1974cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 1975cebe85d5SLukas Czerner { 1976da9e4802SDan Carpenter struct ext4_fs_context *ctx; 1977cebe85d5SLukas Czerner 1978cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 1979cebe85d5SLukas Czerner if (!ctx) 1980cebe85d5SLukas Czerner return -ENOMEM; 1981cebe85d5SLukas Czerner 1982cebe85d5SLukas Czerner fc->fs_private = ctx; 1983cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 1984cebe85d5SLukas Czerner 1985cebe85d5SLukas Czerner return 0; 1986cebe85d5SLukas Czerner } 1987cebe85d5SLukas Czerner 1988e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 1989e6e268cbSLukas Czerner /* 1990e6e268cbSLukas Czerner * Note the name of the specified quota file. 1991e6e268cbSLukas Czerner */ 1992e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 1993e6e268cbSLukas Czerner struct fs_parameter *param) 1994e6e268cbSLukas Czerner { 1995e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1996e6e268cbSLukas Czerner char *qname; 1997e6e268cbSLukas Czerner 1998e6e268cbSLukas Czerner if (param->size < 1) { 1999e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2000e6e268cbSLukas Czerner return -EINVAL; 2001e6e268cbSLukas Czerner } 2002e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2003e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2004e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2005e6e268cbSLukas Czerner return -EINVAL; 2006e6e268cbSLukas Czerner } 2007e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2008e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2009e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2010e6e268cbSLukas Czerner "%s quota file already specified", 2011e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2012e6e268cbSLukas Czerner return -EINVAL; 2013e6e268cbSLukas Czerner } 2014e6e268cbSLukas Czerner return 0; 2015e6e268cbSLukas Czerner } 2016e6e268cbSLukas Czerner 2017e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2018e6e268cbSLukas Czerner if (!qname) { 2019e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2020e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2021e6e268cbSLukas Czerner return -ENOMEM; 2022e6e268cbSLukas Czerner } 2023e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2024e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20256e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2026e6e268cbSLukas Czerner return 0; 2027e6e268cbSLukas Czerner } 2028e6e268cbSLukas Czerner 2029e6e268cbSLukas Czerner /* 2030e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2031e6e268cbSLukas Czerner */ 2032e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2033e6e268cbSLukas Czerner { 2034e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2035e6e268cbSLukas Czerner 2036e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 2037e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2038e6e268cbSLukas Czerner 2039e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2040e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20416e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2042e6e268cbSLukas Czerner return 0; 2043e6e268cbSLukas Czerner } 2044e6e268cbSLukas Czerner #endif 2045e6e268cbSLukas Czerner 204685456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 204785456054SEric Biggers struct ext4_fs_context *ctx) 204885456054SEric Biggers { 204985456054SEric Biggers int err; 205085456054SEric Biggers 205185456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 205285456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 205385456054SEric Biggers "test_dummy_encryption option not supported"); 205485456054SEric Biggers return -EINVAL; 205585456054SEric Biggers } 205685456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 205785456054SEric Biggers &ctx->dummy_enc_policy); 205885456054SEric Biggers if (err == -EINVAL) { 205985456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 206085456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 206185456054SEric Biggers } else if (err == -EEXIST) { 206285456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 206385456054SEric Biggers "Conflicting test_dummy_encryption options"); 206485456054SEric Biggers return -EINVAL; 206585456054SEric Biggers } 206685456054SEric Biggers return err; 206785456054SEric Biggers } 206885456054SEric Biggers 20696e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20704c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20714c246728SLukas Czerner unsigned long flag) \ 20726e47a3ccSLukas Czerner { \ 20736e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20746e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2075e3952fccSLukas Czerner } 2076e3952fccSLukas Czerner 2077e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 20784c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 20794c246728SLukas Czerner unsigned long flag) \ 20806e47a3ccSLukas Czerner { \ 20816e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20826e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2083e3952fccSLukas Czerner } 2084e3952fccSLukas Czerner 2085e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 20864c246728SLukas Czerner static inline unsigned long \ 20874c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 20886e47a3ccSLukas Czerner { \ 20894c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2090e3952fccSLukas Czerner } 20916e47a3ccSLukas Czerner 2092e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 20936e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2094e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2095e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 20966e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2097e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2098e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2099e3952fccSLukas Czerner 2100e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2101e3952fccSLukas Czerner { 2102e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2103e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2104e3952fccSLukas Czerner } 21056e47a3ccSLukas Czerner 210602f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 210726092bf5STheodore Ts'o { 2108461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2109461c3af0SLukas Czerner struct fs_parse_result result; 211026092bf5STheodore Ts'o const struct mount_opts *m; 2111461c3af0SLukas Czerner int is_remount; 211208cefc7aSEric W. Biederman kuid_t uid; 211308cefc7aSEric W. Biederman kgid_t gid; 2114461c3af0SLukas Czerner int token; 2115461c3af0SLukas Czerner 2116461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2117461c3af0SLukas Czerner if (token < 0) 2118461c3af0SLukas Czerner return token; 2119461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 212026092bf5STheodore Ts'o 2121ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2122ba2e524dSLukas Czerner if (token == m->token) 2123ba2e524dSLukas Czerner break; 2124ba2e524dSLukas Czerner 2125ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2126ba2e524dSLukas Czerner 2127ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2128ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2129ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2130ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2131ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2132ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2133ba2e524dSLukas Czerner } else 2134ba2e524dSLukas Czerner return -EINVAL; 2135ba2e524dSLukas Czerner } 2136ba2e524dSLukas Czerner 2137ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2138ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2139ba2e524dSLukas Czerner param->key); 2140ba2e524dSLukas Czerner return 0; 2141ba2e524dSLukas Czerner } 2142ba2e524dSLukas Czerner 2143ba2e524dSLukas Czerner switch (token) { 214457f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2145ba2e524dSLukas Czerner case Opt_usrjquota: 2146461c3af0SLukas Czerner if (!*param->string) 2147e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2148461c3af0SLukas Czerner else 2149e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2150ba2e524dSLukas Czerner case Opt_grpjquota: 2151461c3af0SLukas Czerner if (!*param->string) 2152e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2153461c3af0SLukas Czerner else 2154e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 215557f73c2cSTheodore Ts'o #endif 215626092bf5STheodore Ts'o case Opt_sb: 21577edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21587edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21597edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21607edfd85bSLukas Czerner } else { 21617edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21627edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21637edfd85bSLukas Czerner } 216402f960f8SLukas Czerner return 0; 216526092bf5STheodore Ts'o case Opt_removed: 2166da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2167461c3af0SLukas Czerner param->key); 216802f960f8SLukas Czerner return 0; 216926092bf5STheodore Ts'o case Opt_abort: 2170e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 217102f960f8SLukas Czerner return 0; 21724f74d15fSEric Biggers case Opt_inlinecrypt: 21734f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21746e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21754f74d15fSEric Biggers #else 2176da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21774f74d15fSEric Biggers #endif 217802f960f8SLukas Czerner return 0; 2179461c3af0SLukas Czerner case Opt_errors: 21806e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2181ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2182ba2e524dSLukas Czerner return 0; 2183ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2184ba2e524dSLukas Czerner case Opt_jqfmt: 2185ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2186ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2187ba2e524dSLukas Czerner return 0; 2188ba2e524dSLukas Czerner #endif 2189ba2e524dSLukas Czerner case Opt_data: 2190ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2191ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2192ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2193ba2e524dSLukas Czerner return 0; 2194ba2e524dSLukas Czerner case Opt_commit: 2195461c3af0SLukas Czerner if (result.uint_32 == 0) 2196934b0de1SWang Jianjian result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE; 2197461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2198da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 21999ba55543Szhangyi (F) "Invalid commit interval %d, " 22009ba55543Szhangyi (F) "must be smaller than %d", 2201461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2202da812f61SLukas Czerner return -EINVAL; 22039ba55543Szhangyi (F) } 22046e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22056e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2206ba2e524dSLukas Czerner return 0; 2207ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22086e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2209da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2210461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2211da812f61SLukas Czerner return -EINVAL; 22129803387cSTheodore Ts'o } 22136e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 22146e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2215ba2e524dSLukas Czerner return 0; 2216ba2e524dSLukas Czerner case Opt_max_batch_time: 22176e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 22186e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2219ba2e524dSLukas Czerner return 0; 2220ba2e524dSLukas Czerner case Opt_min_batch_time: 22216e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 22226e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2223ba2e524dSLukas Czerner return 0; 2224ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2225461c3af0SLukas Czerner if (result.uint_32 && 2226461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2227461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2228da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2229e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2230e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2231da812f61SLukas Czerner return -EINVAL; 223226092bf5STheodore Ts'o } 22336e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 22346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2235ba2e524dSLukas Czerner return 0; 2236ba2e524dSLukas Czerner case Opt_init_itable: 22376e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22386e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2239461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22406e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22416e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2242ba2e524dSLukas Czerner return 0; 2243ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22446e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22456e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2246ba2e524dSLukas Czerner return 0; 22478016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2248ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22496e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22506e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2251ba2e524dSLukas Czerner return 0; 22528016e29fSHarshad Shirwadkar #endif 2253ba2e524dSLukas Czerner case Opt_stripe: 22546e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22556e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2256ba2e524dSLukas Czerner return 0; 2257ba2e524dSLukas Czerner case Opt_resuid: 2258461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22590efb3b23SJan Kara if (!uid_valid(uid)) { 2260da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2261461c3af0SLukas Czerner result.uint_32); 2262da812f61SLukas Czerner return -EINVAL; 22630efb3b23SJan Kara } 22646e47a3ccSLukas Czerner ctx->s_resuid = uid; 22656e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2266ba2e524dSLukas Czerner return 0; 2267ba2e524dSLukas Czerner case Opt_resgid: 2268461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22690efb3b23SJan Kara if (!gid_valid(gid)) { 2270da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2271461c3af0SLukas Czerner result.uint_32); 2272da812f61SLukas Czerner return -EINVAL; 22730efb3b23SJan Kara } 22746e47a3ccSLukas Czerner ctx->s_resgid = gid; 22756e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2276ba2e524dSLukas Czerner return 0; 2277ba2e524dSLukas Czerner case Opt_journal_dev: 22780efb3b23SJan Kara if (is_remount) { 2279da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22800efb3b23SJan Kara "Cannot specify journal on remount"); 2281da812f61SLukas Czerner return -EINVAL; 22820efb3b23SJan Kara } 2283461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22846e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2285ba2e524dSLukas Czerner return 0; 2286ba2e524dSLukas Czerner case Opt_journal_path: 2287ba2e524dSLukas Czerner { 2288ad4eec61SEric Sandeen struct inode *journal_inode; 2289ad4eec61SEric Sandeen struct path path; 2290ad4eec61SEric Sandeen int error; 2291ad4eec61SEric Sandeen 2292ad4eec61SEric Sandeen if (is_remount) { 2293da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2294ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2295da812f61SLukas Czerner return -EINVAL; 2296ad4eec61SEric Sandeen } 2297ad4eec61SEric Sandeen 2298e3ea75eeSLukas Czerner error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path); 2299ad4eec61SEric Sandeen if (error) { 2300da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2301461c3af0SLukas Czerner "journal device path"); 2302da812f61SLukas Czerner return -EINVAL; 2303ad4eec61SEric Sandeen } 2304ad4eec61SEric Sandeen 23052b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2306461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23076e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2308ad4eec61SEric Sandeen path_put(&path); 2309ba2e524dSLukas Czerner return 0; 2310ba2e524dSLukas Czerner } 2311ba2e524dSLukas Czerner case Opt_journal_ioprio: 2312461c3af0SLukas Czerner if (result.uint_32 > 7) { 2313da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 23140efb3b23SJan Kara " (must be 0-7)"); 2315da812f61SLukas Czerner return -EINVAL; 23160efb3b23SJan Kara } 2317461c3af0SLukas Czerner ctx->journal_ioprio = 2318461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 23196e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2320ba2e524dSLukas Czerner return 0; 2321ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 232285456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2323ba2e524dSLukas Czerner case Opt_dax: 2324ba2e524dSLukas Czerner case Opt_dax_type: 2325ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2326ba2e524dSLukas Czerner { 2327ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2328ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2329ba2e524dSLukas Czerner 2330ba2e524dSLukas Czerner switch (type) { 23319cb20f94SIra Weiny case Opt_dax: 23329cb20f94SIra Weiny case Opt_dax_always: 2333ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23346e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23359cb20f94SIra Weiny break; 23369cb20f94SIra Weiny case Opt_dax_never: 2337ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23386e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23399cb20f94SIra Weiny break; 23409cb20f94SIra Weiny case Opt_dax_inode: 23416e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23426e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23439cb20f94SIra Weiny /* Strictly for printing options */ 2344ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23459cb20f94SIra Weiny break; 23469cb20f94SIra Weiny } 2347ba2e524dSLukas Czerner return 0; 2348ba2e524dSLukas Czerner } 2349ef83b6e8SDan Williams #else 2350da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2351da812f61SLukas Czerner return -EINVAL; 2352923ae0ffSRoss Zwisler #endif 2353ba2e524dSLukas Czerner case Opt_data_err: 2354ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23556e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2356ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23576e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2358ba2e524dSLukas Czerner return 0; 2359ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 236027b38686SOjaswin Mujoo if (result.int_32 == 1) { 236127b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 236227b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 236327b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 236427b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 236527b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 236627b38686SOjaswin Mujoo } else { 2367da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2368196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2369da812f61SLukas Czerner return -EINVAL; 2370196e402aSHarshad Shirwadkar } 2371ba2e524dSLukas Czerner return 0; 2372ba2e524dSLukas Czerner } 2373ba2e524dSLukas Czerner 2374ba2e524dSLukas Czerner /* 2375ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2376ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2377ba2e524dSLukas Czerner */ 2378ba2e524dSLukas Czerner if (m->token == Opt_err) { 2379ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2380ba2e524dSLukas Czerner param->key); 2381ba2e524dSLukas Czerner WARN_ON(1); 2382ba2e524dSLukas Czerner return -EINVAL; 2383ba2e524dSLukas Czerner } 2384ba2e524dSLukas Czerner 2385ba2e524dSLukas Czerner else { 2386461c3af0SLukas Czerner unsigned int set = 0; 2387461c3af0SLukas Czerner 2388461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2389461c3af0SLukas Czerner result.uint_32 > 0) 2390461c3af0SLukas Czerner set = 1; 2391461c3af0SLukas Czerner 239226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2393461c3af0SLukas Czerner set = !set; 239426092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2395da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2396461c3af0SLukas Czerner "buggy handling of option %s", 2397461c3af0SLukas Czerner param->key); 239826092bf5STheodore Ts'o WARN_ON(1); 2399da812f61SLukas Czerner return -EINVAL; 240026092bf5STheodore Ts'o } 2401995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2402461c3af0SLukas Czerner if (set != 0) 24036e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2404995a3ed6SHarshad Shirwadkar else 24056e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2406995a3ed6SHarshad Shirwadkar } else { 2407461c3af0SLukas Czerner if (set != 0) 24086e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 240926092bf5STheodore Ts'o else 24106e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 241126092bf5STheodore Ts'o } 2412995a3ed6SHarshad Shirwadkar } 2413ba2e524dSLukas Czerner 241402f960f8SLukas Czerner return 0; 241526092bf5STheodore Ts'o } 241626092bf5STheodore Ts'o 24177edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2418ac27a0ecSDave Kleikamp { 2419461c3af0SLukas Czerner struct fs_parameter param; 2420461c3af0SLukas Czerner int ret; 2421461c3af0SLukas Czerner char *key; 2422ac27a0ecSDave Kleikamp 2423ac27a0ecSDave Kleikamp if (!options) 24247edfd85bSLukas Czerner return 0; 2425461c3af0SLukas Czerner 2426461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2427461c3af0SLukas Czerner if (*key) { 2428461c3af0SLukas Czerner size_t v_len = 0; 2429461c3af0SLukas Czerner char *value = strchr(key, '='); 2430461c3af0SLukas Czerner 2431461c3af0SLukas Czerner param.type = fs_value_is_flag; 2432461c3af0SLukas Czerner param.string = NULL; 2433461c3af0SLukas Czerner 2434461c3af0SLukas Czerner if (value) { 2435461c3af0SLukas Czerner if (value == key) 2436ac27a0ecSDave Kleikamp continue; 2437461c3af0SLukas Czerner 2438461c3af0SLukas Czerner *value++ = 0; 2439461c3af0SLukas Czerner v_len = strlen(value); 2440461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2441461c3af0SLukas Czerner GFP_KERNEL); 2442461c3af0SLukas Czerner if (!param.string) 24437edfd85bSLukas Czerner return -ENOMEM; 2444461c3af0SLukas Czerner param.type = fs_value_is_string; 2445461c3af0SLukas Czerner } 2446461c3af0SLukas Czerner 2447461c3af0SLukas Czerner param.key = key; 2448461c3af0SLukas Czerner param.size = v_len; 2449461c3af0SLukas Czerner 245002f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2451461c3af0SLukas Czerner if (param.string) 2452461c3af0SLukas Czerner kfree(param.string); 2453461c3af0SLukas Czerner if (ret < 0) 24547edfd85bSLukas Czerner return ret; 2455ac27a0ecSDave Kleikamp } 2456461c3af0SLukas Czerner } 2457461c3af0SLukas Czerner 24587edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2459da812f61SLukas Czerner if (ret < 0) 24607edfd85bSLukas Czerner return ret; 24617edfd85bSLukas Czerner 24627edfd85bSLukas Czerner return 0; 24637edfd85bSLukas Czerner } 24647edfd85bSLukas Czerner 24657edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24667edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24677edfd85bSLukas Czerner { 24687edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24697edfd85bSLukas Czerner char *s_mount_opts = NULL; 24707edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24717edfd85bSLukas Czerner struct fs_context *fc = NULL; 24727edfd85bSLukas Czerner int ret = -ENOMEM; 24737edfd85bSLukas Czerner 24747edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2475da812f61SLukas Czerner return 0; 2476da812f61SLukas Czerner 24777edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24787edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24797edfd85bSLukas Czerner GFP_KERNEL); 24807edfd85bSLukas Czerner if (!s_mount_opts) 24817edfd85bSLukas Czerner return ret; 2482e6e268cbSLukas Czerner 24837edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24847edfd85bSLukas Czerner if (!fc) 24857edfd85bSLukas Czerner goto out_free; 2486e6e268cbSLukas Czerner 24877edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 24887edfd85bSLukas Czerner if (!s_ctx) 24897edfd85bSLukas Czerner goto out_free; 24907edfd85bSLukas Czerner 24917edfd85bSLukas Czerner fc->fs_private = s_ctx; 24927edfd85bSLukas Czerner fc->s_fs_info = sbi; 24937edfd85bSLukas Czerner 24947edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 24957edfd85bSLukas Czerner if (ret < 0) 24967edfd85bSLukas Czerner goto parse_failed; 24977edfd85bSLukas Czerner 24987edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 24997edfd85bSLukas Czerner if (ret < 0) { 25007edfd85bSLukas Czerner parse_failed: 25017edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 25027edfd85bSLukas Czerner "failed to parse options in superblock: %s", 25037edfd85bSLukas Czerner s_mount_opts); 25047edfd85bSLukas Czerner ret = 0; 25057edfd85bSLukas Czerner goto out_free; 25067edfd85bSLukas Czerner } 25077edfd85bSLukas Czerner 25087edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 25097edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 25107edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 25117edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 25127edfd85bSLukas Czerner 251385456054SEric Biggers ext4_apply_options(fc, sb); 251485456054SEric Biggers ret = 0; 25157edfd85bSLukas Czerner 25167edfd85bSLukas Czerner out_free: 2517c069db76SEric Biggers if (fc) { 2518c069db76SEric Biggers ext4_fc_free(fc); 25197edfd85bSLukas Czerner kfree(fc); 2520c069db76SEric Biggers } 25217edfd85bSLukas Czerner kfree(s_mount_opts); 25227edfd85bSLukas Czerner return ret; 25234c94bff9SLukas Czerner } 25244c94bff9SLukas Czerner 2525e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2526e6e268cbSLukas Czerner struct super_block *sb) 2527e6e268cbSLukas Czerner { 2528e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 25296e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2530e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2531e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2532e6e268cbSLukas Czerner char *qname; 2533e6e268cbSLukas Czerner int i; 2534e6e268cbSLukas Czerner 25356e47a3ccSLukas Czerner if (quota_feature) 25366e47a3ccSLukas Czerner return; 25376e47a3ccSLukas Czerner 25386e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2539e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2540e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2541e6e268cbSLukas Czerner continue; 25426e47a3ccSLukas Czerner 2543e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25444c1bd5a9SLukas Czerner if (qname) 25454c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2546e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 254713b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 254813b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 254913b215a9SLukas Czerner if (qname) 255013b215a9SLukas Czerner kfree_rcu(qname); 2551e6e268cbSLukas Czerner } 25526e47a3ccSLukas Czerner } 25536e47a3ccSLukas Czerner 25546e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25556e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2556e6e268cbSLukas Czerner #endif 2557e6e268cbSLukas Czerner } 2558e6e268cbSLukas Czerner 2559e6e268cbSLukas Czerner /* 2560e6e268cbSLukas Czerner * Check quota settings consistency. 2561e6e268cbSLukas Czerner */ 2562e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2563e6e268cbSLukas Czerner struct super_block *sb) 2564e6e268cbSLukas Czerner { 2565e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2566e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2567e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2568e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2569e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25706e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25716e47a3ccSLukas Czerner int quota_flags, i; 2572e6e268cbSLukas Czerner 25736e47a3ccSLukas Czerner /* 25746e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25756e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25766e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25776e47a3ccSLukas Czerner */ 25786e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25796e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25806e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25816e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25826e47a3ccSLukas Czerner return -EINVAL; 25836e47a3ccSLukas Czerner } 25846e47a3ccSLukas Czerner 25856e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 25866e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 25876e47a3ccSLukas Czerner if (quota_loaded && 25886e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 25896e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 25906e47a3ccSLukas Czerner goto err_quota_change; 25916e47a3ccSLukas Czerner 25926e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2593e6e268cbSLukas Czerner 2594e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2595e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2596e6e268cbSLukas Czerner continue; 2597e6e268cbSLukas Czerner 25986e47a3ccSLukas Czerner if (quota_loaded && 25996e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2600e6e268cbSLukas Czerner goto err_jquota_change; 2601e6e268cbSLukas Czerner 2602e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 260313b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2604e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2605e6e268cbSLukas Czerner goto err_jquota_specified; 2606e6e268cbSLukas Czerner } 26076e47a3ccSLukas Czerner 26086e47a3ccSLukas Czerner if (quota_feature) { 26096e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 26106e47a3ccSLukas Czerner "Journaled quota options ignored when " 26116e47a3ccSLukas Czerner "QUOTA feature is enabled"); 26126e47a3ccSLukas Czerner return 0; 26136e47a3ccSLukas Czerner } 2614e6e268cbSLukas Czerner } 2615e6e268cbSLukas Czerner 26166e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2617e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 26186e47a3ccSLukas Czerner goto err_jquota_change; 2619e6e268cbSLukas Czerner if (quota_feature) { 2620e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2621e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2622e6e268cbSLukas Czerner return 0; 2623e6e268cbSLukas Czerner } 2624e6e268cbSLukas Czerner } 26256e47a3ccSLukas Czerner 26266e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 26276e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 26286e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 26296e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 26306e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 26316e47a3ccSLukas Czerner 26326e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 26336e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 26346e47a3ccSLukas Czerner 26356e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 26366e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 26376e47a3ccSLukas Czerner 26386e47a3ccSLukas Czerner if (usr_qf_name) { 26396e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26406e47a3ccSLukas Czerner usrquota = false; 26416e47a3ccSLukas Czerner } 26426e47a3ccSLukas Czerner if (grp_qf_name) { 26436e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26446e47a3ccSLukas Czerner grpquota = false; 26456e47a3ccSLukas Czerner } 26466e47a3ccSLukas Czerner 26476e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26486e47a3ccSLukas Czerner if (usrquota || grpquota) { 26496e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26506e47a3ccSLukas Czerner "format mixing"); 26516e47a3ccSLukas Czerner return -EINVAL; 26526e47a3ccSLukas Czerner } 26536e47a3ccSLukas Czerner 26546e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26556e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26566e47a3ccSLukas Czerner "not specified"); 26576e47a3ccSLukas Czerner return -EINVAL; 26586e47a3ccSLukas Czerner } 26596e47a3ccSLukas Czerner } 26606e47a3ccSLukas Czerner 2661e6e268cbSLukas Czerner return 0; 2662e6e268cbSLukas Czerner 2663e6e268cbSLukas Czerner err_quota_change: 2664e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2665e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2666e6e268cbSLukas Czerner return -EINVAL; 2667e6e268cbSLukas Czerner err_jquota_change: 2668e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2669e6e268cbSLukas Czerner "options when quota turned on"); 2670e6e268cbSLukas Czerner return -EINVAL; 2671e6e268cbSLukas Czerner err_jquota_specified: 2672e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2673e6e268cbSLukas Czerner QTYPE2NAME(i)); 2674e6e268cbSLukas Czerner return -EINVAL; 2675e6e268cbSLukas Czerner #else 2676e6e268cbSLukas Czerner return 0; 2677e6e268cbSLukas Czerner #endif 2678e6e268cbSLukas Czerner } 2679e6e268cbSLukas Czerner 26805f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26815f41fdaeSEric Biggers struct super_block *sb) 26825f41fdaeSEric Biggers { 26835f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26845f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 26855f41fdaeSEric Biggers 268685456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 26875f41fdaeSEric Biggers return 0; 26885f41fdaeSEric Biggers 26895f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 26905f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 26915f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 26925f41fdaeSEric Biggers return -EINVAL; 26935f41fdaeSEric Biggers } 26945f41fdaeSEric Biggers /* 26955f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 26965f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 26975f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 26985f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 26995f41fdaeSEric Biggers */ 270085456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 270185456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 270285456054SEric Biggers &ctx->dummy_enc_policy)) 270385456054SEric Biggers return 0; 27045f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 270585456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 27065f41fdaeSEric Biggers return -EINVAL; 27075f41fdaeSEric Biggers } 270885456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 270985456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 271085456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 271185456054SEric Biggers &ctx->dummy_enc_policy)) 27125f41fdaeSEric Biggers return 0; 271385456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 271485456054SEric Biggers "Conflicting test_dummy_encryption options"); 271585456054SEric Biggers return -EINVAL; 271685456054SEric Biggers } 27177959eb19SEric Biggers return 0; 271885456054SEric Biggers } 271985456054SEric Biggers 272085456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 272185456054SEric Biggers struct super_block *sb) 272285456054SEric Biggers { 272385456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 272485456054SEric Biggers /* if already set, it was already verified to be the same */ 272585456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 272685456054SEric Biggers return; 272785456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 272885456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 272985456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27305f41fdaeSEric Biggers } 27315f41fdaeSEric Biggers 2732b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2733b6bd2435SLukas Czerner struct super_block *sb) 2734b6bd2435SLukas Czerner { 2735b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27366e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27376e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27385f41fdaeSEric Biggers int err; 2739b6bd2435SLukas Czerner 2740b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2741b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2742b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2743b6bd2435SLukas Czerner return -EINVAL; 2744b6bd2435SLukas Czerner } 2745b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2746b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2747b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2748b6bd2435SLukas Czerner return -EINVAL; 2749b6bd2435SLukas Czerner } 2750b6bd2435SLukas Czerner 27516e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27526e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27536e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27546e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27556e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27566e47a3ccSLukas Czerner return -EINVAL; 27576e47a3ccSLukas Czerner } 27586e47a3ccSLukas Czerner 27596e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27606e47a3ccSLukas Czerner int blocksize = 27616e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27626e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27636e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27646e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27656e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27666e47a3ccSLukas Czerner } 27676e47a3ccSLukas Czerner 27685f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27695f41fdaeSEric Biggers if (err) 27705f41fdaeSEric Biggers return err; 27716e47a3ccSLukas Czerner 27726e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27736e47a3ccSLukas Czerner if (!sbi->s_journal) { 27746e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27756e47a3ccSLukas Czerner "Remounting file system with no journal " 27766e47a3ccSLukas Czerner "so ignoring journalled data option"); 27776e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27784c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27794c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27806e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27816e47a3ccSLukas Czerner "on remount"); 27826e47a3ccSLukas Czerner return -EINVAL; 27836e47a3ccSLukas Czerner } 27846e47a3ccSLukas Czerner } 27856e47a3ccSLukas Czerner 27866e47a3ccSLukas Czerner if (is_remount) { 27876e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27886e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27896e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27906e47a3ccSLukas Czerner "both data=journal and dax"); 27916e47a3ccSLukas Czerner return -EINVAL; 27926e47a3ccSLukas Czerner } 27936e47a3ccSLukas Czerner 27946e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27956e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27966e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 27976e47a3ccSLukas Czerner fail_dax_change_remount: 27986e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 27996e47a3ccSLukas Czerner "dax mount option while remounting"); 28006e47a3ccSLukas Czerner return -EINVAL; 28016e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28026e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28036e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28046e47a3ccSLukas Czerner goto fail_dax_change_remount; 28056e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28066e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28076e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28086e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28096e47a3ccSLukas Czerner goto fail_dax_change_remount; 28106e47a3ccSLukas Czerner } 28116e47a3ccSLukas Czerner } 28126e47a3ccSLukas Czerner 2813b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2814b6bd2435SLukas Czerner } 2815b6bd2435SLukas Czerner 281685456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28176e47a3ccSLukas Czerner { 28186e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28196e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28206e47a3ccSLukas Czerner 28216e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28226e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28236e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28246e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28256e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28266e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28276e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28286e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28296e47a3ccSLukas Czerner 28306e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28316e47a3ccSLukas Czerner APPLY(s_commit_interval); 28326e47a3ccSLukas Czerner APPLY(s_stripe); 28336e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28346e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28356e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28366e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28376e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28386e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28396e47a3ccSLukas Czerner APPLY(s_resgid); 28406e47a3ccSLukas Czerner APPLY(s_resuid); 28416e47a3ccSLukas Czerner 28426e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28436e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28446e47a3ccSLukas Czerner #endif 28456e47a3ccSLukas Czerner 28466e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 284785456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28486e47a3ccSLukas Czerner } 28496e47a3ccSLukas Czerner 28506e47a3ccSLukas Czerner 2851da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28524c94bff9SLukas Czerner { 2853ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28546e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28554c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28566e47a3ccSLukas Czerner 28576e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28586e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28596e47a3ccSLukas Czerner 286033458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28616e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28626e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2863ac27a0ecSDave Kleikamp 28646e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28656e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2866ac27a0ecSDave Kleikamp 28676e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28686e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2869da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2870b31e1552SEric Sandeen "format mixing"); 2871da812f61SLukas Czerner return -EINVAL; 2872ac27a0ecSDave Kleikamp } 2873ac27a0ecSDave Kleikamp } 2874ac27a0ecSDave Kleikamp #endif 28756e47a3ccSLukas Czerner return 1; 2876ac27a0ecSDave Kleikamp } 2877ac27a0ecSDave Kleikamp 28782adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28792adf6da8STheodore Ts'o struct super_block *sb) 28802adf6da8STheodore Ts'o { 28812adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28822adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 288333458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28842adf6da8STheodore Ts'o 28852adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28862adf6da8STheodore Ts'o char *fmtname = ""; 28872adf6da8STheodore Ts'o 28882adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28892adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28902adf6da8STheodore Ts'o fmtname = "vfsold"; 28912adf6da8STheodore Ts'o break; 28922adf6da8STheodore Ts'o case QFMT_VFS_V0: 28932adf6da8STheodore Ts'o fmtname = "vfsv0"; 28942adf6da8STheodore Ts'o break; 28952adf6da8STheodore Ts'o case QFMT_VFS_V1: 28962adf6da8STheodore Ts'o fmtname = "vfsv1"; 28972adf6da8STheodore Ts'o break; 28982adf6da8STheodore Ts'o } 28992adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29002adf6da8STheodore Ts'o } 29012adf6da8STheodore Ts'o 290233458eabSTheodore Ts'o rcu_read_lock(); 290333458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 290433458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 290533458eabSTheodore Ts'o if (usr_qf_name) 290633458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 290733458eabSTheodore Ts'o if (grp_qf_name) 290833458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 290933458eabSTheodore Ts'o rcu_read_unlock(); 29102adf6da8STheodore Ts'o #endif 29112adf6da8STheodore Ts'o } 29122adf6da8STheodore Ts'o 29135a916be1STheodore Ts'o static const char *token2str(int token) 29145a916be1STheodore Ts'o { 291597d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29165a916be1STheodore Ts'o 291797d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 291897d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29195a916be1STheodore Ts'o break; 292097d8a670SLukas Czerner return spec->name; 29215a916be1STheodore Ts'o } 29225a916be1STheodore Ts'o 29232adf6da8STheodore Ts'o /* 29242adf6da8STheodore Ts'o * Show an option if 29252adf6da8STheodore Ts'o * - it's set to a non-default value OR 29262adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29272adf6da8STheodore Ts'o */ 292866acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 292966acdcf4STheodore Ts'o int nodefs) 29302adf6da8STheodore Ts'o { 29312adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29322adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 2933e3645d72SZhang Yi int def_errors; 29345a916be1STheodore Ts'o const struct mount_opts *m; 293566acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29362adf6da8STheodore Ts'o 293766acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 293866acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29392adf6da8STheodore Ts'o 29402adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29415a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29425a916be1STheodore Ts'o 29435a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29445a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 2945e3645d72SZhang Yi int opt_2 = m->flags & MOPT_2; 2946e3645d72SZhang Yi unsigned int mount_opt, def_mount_opt; 2947e3645d72SZhang Yi 29485a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2949ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29505a916be1STheodore Ts'o continue; 2951e3645d72SZhang Yi 2952e3645d72SZhang Yi if (opt_2) { 2953e3645d72SZhang Yi mount_opt = sbi->s_mount_opt2; 2954e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt2; 2955e3645d72SZhang Yi } else { 2956e3645d72SZhang Yi mount_opt = sbi->s_mount_opt; 2957e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt; 2958e3645d72SZhang Yi } 2959e3645d72SZhang Yi /* skip if same as the default */ 2960e3645d72SZhang Yi if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt))) 2961e3645d72SZhang Yi continue; 2962e3645d72SZhang Yi /* select Opt_noFoo vs Opt_Foo */ 29635a916be1STheodore Ts'o if ((want_set && 2964e3645d72SZhang Yi (mount_opt & m->mount_opt) != m->mount_opt) || 2965e3645d72SZhang Yi (!want_set && (mount_opt & m->mount_opt))) 2966e3645d72SZhang Yi continue; 29675a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29685a916be1STheodore Ts'o } 29695a916be1STheodore Ts'o 297008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29715a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 297208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 297308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 297408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29755a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 297608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 297708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 297866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29795a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29805a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29812adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29825a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29832adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29845a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 298566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29865a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 298766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29885a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 298966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29905a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 299166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 29925a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 299368afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 2994e3645d72SZhang Yi (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 29952adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29965a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 29972adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29985a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 29992adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30005a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30015a916be1STheodore Ts'o } 300266acdcf4STheodore Ts'o if (nodefs || 300366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30045a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30052adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30062adf6da8STheodore Ts'o 3007ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 300866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30095a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3010df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3011df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30127915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30137915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3014ed318a6cSEric Biggers 3015ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30162adf6da8STheodore Ts'o 30174f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30184f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30194f74d15fSEric Biggers 30209cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30219cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30229cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30239cb20f94SIra Weiny else 30249cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30259cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30269cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30279cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30289cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30299cb20f94SIra Weiny } 30303fa5d23eSOjaswin Mujoo 30313fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30323fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30333fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 30343fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30353fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30363fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 30373fa5d23eSOjaswin Mujoo } 30383fa5d23eSOjaswin Mujoo 30392adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30402adf6da8STheodore Ts'o return 0; 30412adf6da8STheodore Ts'o } 30422adf6da8STheodore Ts'o 304366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 304466acdcf4STheodore Ts'o { 304566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 304666acdcf4STheodore Ts'o } 304766acdcf4STheodore Ts'o 3048ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 304966acdcf4STheodore Ts'o { 305066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 305166acdcf4STheodore Ts'o int rc; 305266acdcf4STheodore Ts'o 3053bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 305466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 305566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 305666acdcf4STheodore Ts'o return rc; 305766acdcf4STheodore Ts'o } 305866acdcf4STheodore Ts'o 3059617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3060ac27a0ecSDave Kleikamp int read_only) 3061ac27a0ecSDave Kleikamp { 3062617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3063c89128a0SJaegeuk Kim int err = 0; 3064ac27a0ecSDave Kleikamp 3065617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3067b31e1552SEric Sandeen "forcing read-only mode"); 3068c89128a0SJaegeuk Kim err = -EROFS; 30695adaccacSyangerkun goto done; 3070ac27a0ecSDave Kleikamp } 3071ac27a0ecSDave Kleikamp if (read_only) 3072281b5995STheodore Ts'o goto done; 3073617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3074b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3075b31e1552SEric Sandeen "running e2fsck is recommended"); 3076c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3077b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3078b31e1552SEric Sandeen "warning: mounting fs with errors, " 3079b31e1552SEric Sandeen "running e2fsck is recommended"); 3080ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3081ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3082ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3083b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3084b31e1552SEric Sandeen "warning: maximal mount count reached, " 3085b31e1552SEric Sandeen "running e2fsck is recommended"); 3086ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30876a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30886a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3089b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3090b31e1552SEric Sandeen "warning: checktime reached, " 3091b31e1552SEric Sandeen "running e2fsck is recommended"); 30920390131bSFrank Mayhar if (!sbi->s_journal) 3093216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3094ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3095617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3096e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 30976a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 309802f310fcSJan Kara if (sbi->s_journal) { 3099e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 310002f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 310102f310fcSJan Kara ext4_set_feature_orphan_present(sb); 310202f310fcSJan Kara } 3103ac27a0ecSDave Kleikamp 31044392fbc4SJan Kara err = ext4_commit_super(sb); 3105281b5995STheodore Ts'o done: 3106ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3107a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3108a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3109ac27a0ecSDave Kleikamp sb->s_blocksize, 3110ac27a0ecSDave Kleikamp sbi->s_groups_count, 3111617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3112617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3113a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3114c89128a0SJaegeuk Kim return err; 3115ac27a0ecSDave Kleikamp } 3116ac27a0ecSDave Kleikamp 3117117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3118117fff10STheodore Ts'o { 3119117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31207c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 312137b0b6b8SDan Carpenter int size, i, j; 3122117fff10STheodore Ts'o 3123117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3124117fff10STheodore Ts'o return 0; 3125117fff10STheodore Ts'o 3126117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3127117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3128117fff10STheodore Ts'o return 0; 3129117fff10STheodore Ts'o 31307c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31317c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3132117fff10STheodore Ts'o if (!new_groups) { 31337c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31347c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3135117fff10STheodore Ts'o return -ENOMEM; 3136117fff10STheodore Ts'o } 31377c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31387c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31397c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31407c990728SSuraj Jitindar Singh GFP_KERNEL); 31417c990728SSuraj Jitindar Singh if (!new_groups[i]) { 314237b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 314337b0b6b8SDan Carpenter kvfree(new_groups[j]); 31447c990728SSuraj Jitindar Singh kvfree(new_groups); 31457c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31467c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31477c990728SSuraj Jitindar Singh return -ENOMEM; 3148117fff10STheodore Ts'o } 31497c990728SSuraj Jitindar Singh } 31507c990728SSuraj Jitindar Singh rcu_read_lock(); 31517c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31527c990728SSuraj Jitindar Singh if (old_groups) 31537c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31547c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31557c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31567c990728SSuraj Jitindar Singh rcu_read_unlock(); 31577c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31587c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31597c990728SSuraj Jitindar Singh if (old_groups) 31607c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3161117fff10STheodore Ts'o return 0; 3162117fff10STheodore Ts'o } 3163117fff10STheodore Ts'o 3164772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3165772cb7c8SJose R. Santos { 3166772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3167772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31687c990728SSuraj Jitindar Singh struct flex_groups *fg; 3169772cb7c8SJose R. Santos ext4_group_t flex_group; 3170117fff10STheodore Ts'o int i, err; 3171772cb7c8SJose R. Santos 3172503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3173d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3174772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3175772cb7c8SJose R. Santos return 1; 3176772cb7c8SJose R. Santos } 3177772cb7c8SJose R. Santos 3178117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3179117fff10STheodore Ts'o if (err) 3180772cb7c8SJose R. Santos goto failed; 3181772cb7c8SJose R. Santos 3182772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 318388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3184772cb7c8SJose R. Santos 3185772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31867c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31877c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 318890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31897c990728SSuraj Jitindar Singh &fg->free_clusters); 31907c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3191772cb7c8SJose R. Santos } 3192772cb7c8SJose R. Santos 3193772cb7c8SJose R. Santos return 1; 3194772cb7c8SJose R. Santos failed: 3195772cb7c8SJose R. Santos return 0; 3196772cb7c8SJose R. Santos } 3197772cb7c8SJose R. Santos 3198e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3199717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3200717d50e4SAndreas Dilger { 3201b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3202717d50e4SAndreas Dilger __u16 crc = 0; 3203717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3204e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3205717d50e4SAndreas Dilger 32069aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3207feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3208feb0ab32SDarrick J. Wong __u32 csum32; 3209b47820edSDaeho Jeong __u16 dummy_csum = 0; 3210feb0ab32SDarrick J. Wong 3211feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3212feb0ab32SDarrick J. Wong sizeof(le_group)); 3213b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3214b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3215b47820edSDaeho Jeong sizeof(dummy_csum)); 3216b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3217b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3218b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3219b47820edSDaeho Jeong sbi->s_desc_size - offset); 3220feb0ab32SDarrick J. Wong 3221feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3222feb0ab32SDarrick J. Wong goto out; 3223feb0ab32SDarrick J. Wong } 3224feb0ab32SDarrick J. Wong 3225feb0ab32SDarrick J. Wong /* old crc16 code */ 3226e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3227813d32f9SDarrick J. Wong return 0; 3228813d32f9SDarrick J. Wong 3229717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3230717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3231717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3232717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3233717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3234e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3235717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3236717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3237717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3238717d50e4SAndreas Dilger offset); 3239717d50e4SAndreas Dilger 3240feb0ab32SDarrick J. Wong out: 3241717d50e4SAndreas Dilger return cpu_to_le16(crc); 3242717d50e4SAndreas Dilger } 3243717d50e4SAndreas Dilger 3244feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3245717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3246717d50e4SAndreas Dilger { 3247feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3248e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3249717d50e4SAndreas Dilger return 0; 3250717d50e4SAndreas Dilger 3251717d50e4SAndreas Dilger return 1; 3252717d50e4SAndreas Dilger } 3253717d50e4SAndreas Dilger 3254feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3255feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3256feb0ab32SDarrick J. Wong { 3257feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3258feb0ab32SDarrick J. Wong return; 3259e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3260feb0ab32SDarrick J. Wong } 3261feb0ab32SDarrick J. Wong 3262ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3263bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3264829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3265bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3266ac27a0ecSDave Kleikamp { 3267617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3268617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3269617ba13bSMingming Cao ext4_fsblk_t last_block; 327044de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3271bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3272bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3273bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3274ce421581SJose R. Santos int flexbg_flag = 0; 3275bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3276ac27a0ecSDave Kleikamp 3277e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3278ce421581SJose R. Santos flexbg_flag = 1; 3279ce421581SJose R. Santos 3280617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3281ac27a0ecSDave Kleikamp 3282197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3283197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3284197cd65aSAkinobu Mita 3285ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3286bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3287ac27a0ecSDave Kleikamp else 3288ac27a0ecSDave Kleikamp last_block = first_block + 3289617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3290ac27a0ecSDave Kleikamp 3291bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3292bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3293bfff6873SLukas Czerner grp = i; 3294bfff6873SLukas Czerner 32958fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3296829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3297829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3298829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3299829fa70dSTheodore Ts'o "superblock", i); 330018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 330118db4b4eSTheodore Ts'o return 0; 3302829fa70dSTheodore Ts'o } 330377260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 330477260807STheodore Ts'o block_bitmap <= last_bg_block) { 330577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 330677260807STheodore Ts'o "Block bitmap for group %u overlaps " 330777260807STheodore Ts'o "block group descriptors", i); 330877260807STheodore Ts'o if (!sb_rdonly(sb)) 330977260807STheodore Ts'o return 0; 331077260807STheodore Ts'o } 33112b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3312b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3313a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3314b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3315ac27a0ecSDave Kleikamp return 0; 3316ac27a0ecSDave Kleikamp } 33178fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3318829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3319829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3320829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3321829fa70dSTheodore Ts'o "superblock", i); 332218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 332318db4b4eSTheodore Ts'o return 0; 3324829fa70dSTheodore Ts'o } 332577260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 332677260807STheodore Ts'o inode_bitmap <= last_bg_block) { 332777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 332877260807STheodore Ts'o "Inode bitmap for group %u overlaps " 332977260807STheodore Ts'o "block group descriptors", i); 333077260807STheodore Ts'o if (!sb_rdonly(sb)) 333177260807STheodore Ts'o return 0; 333277260807STheodore Ts'o } 33332b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3335a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3336b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3337ac27a0ecSDave Kleikamp return 0; 3338ac27a0ecSDave Kleikamp } 33398fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3340829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3341829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3342829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3343829fa70dSTheodore Ts'o "superblock", i); 334418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 334518db4b4eSTheodore Ts'o return 0; 3346829fa70dSTheodore Ts'o } 334777260807STheodore Ts'o if (inode_table >= sb_block + 1 && 334877260807STheodore Ts'o inode_table <= last_bg_block) { 334977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335077260807STheodore Ts'o "Inode table for group %u overlaps " 335177260807STheodore Ts'o "block group descriptors", i); 335277260807STheodore Ts'o if (!sb_rdonly(sb)) 335377260807STheodore Ts'o return 0; 335477260807STheodore Ts'o } 3355bd81d8eeSLaurent Vivier if (inode_table < first_block || 33562b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3357b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3358a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3359b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3360ac27a0ecSDave Kleikamp return 0; 3361ac27a0ecSDave Kleikamp } 3362955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3363feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3364b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3365b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3366e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3367fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3368bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3369955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3370717d50e4SAndreas Dilger return 0; 3371717d50e4SAndreas Dilger } 33727ee1ec4cSLi Zefan } 3373955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3374ce421581SJose R. Santos if (!flexbg_flag) 3375617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3376ac27a0ecSDave Kleikamp } 3377bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3378bfff6873SLukas Czerner *first_not_zeroed = grp; 3379ac27a0ecSDave Kleikamp return 1; 3380ac27a0ecSDave Kleikamp } 3381ac27a0ecSDave Kleikamp 3382cd2291a4SEric Sandeen /* 3383cd2291a4SEric Sandeen * Maximal extent format file size. 3384cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3385cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3386cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3387cd2291a4SEric Sandeen * so that won't be a limiting factor. 3388cd2291a4SEric Sandeen * 3389f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3390f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3391f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3392f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3393f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3394f17722f9SLukas Czerner * 3395cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3396cd2291a4SEric Sandeen */ 3397f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3398cd2291a4SEric Sandeen { 3399cd2291a4SEric Sandeen loff_t res; 3400cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3401cd2291a4SEric Sandeen 340272deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 340372deb455SChristoph Hellwig 340472deb455SChristoph Hellwig if (!has_huge_files) { 3405cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3406cd2291a4SEric Sandeen 3407cd2291a4SEric Sandeen /* total blocks in file system block size */ 3408cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3409cd2291a4SEric Sandeen upper_limit <<= blkbits; 3410cd2291a4SEric Sandeen } 3411cd2291a4SEric Sandeen 3412f17722f9SLukas Czerner /* 3413f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3414f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3415f17722f9SLukas Czerner * size 3416f17722f9SLukas Czerner */ 3417f17722f9SLukas Czerner res = (1LL << 32) - 1; 3418cd2291a4SEric Sandeen res <<= blkbits; 3419cd2291a4SEric Sandeen 3420cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3421cd2291a4SEric Sandeen if (res > upper_limit) 3422cd2291a4SEric Sandeen res = upper_limit; 3423cd2291a4SEric Sandeen 3424cd2291a4SEric Sandeen return res; 3425cd2291a4SEric Sandeen } 3426ac27a0ecSDave Kleikamp 3427ac27a0ecSDave Kleikamp /* 3428cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34290fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34300fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3431ac27a0ecSDave Kleikamp */ 3432f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3433ac27a0ecSDave Kleikamp { 34345c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34350fc1b451SAneesh Kumar K.V int meta_blocks; 34365c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 343775ca6ad4SRitesh Harjani 343875ca6ad4SRitesh Harjani /* 343975ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34400b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34410b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34420b8e58a1SAndreas Dilger * 34430b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34440b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34450fc1b451SAneesh Kumar K.V */ 344672deb455SChristoph Hellwig if (!has_huge_files) { 34470fc1b451SAneesh Kumar K.V /* 344872deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 344972deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 345072deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34510fc1b451SAneesh Kumar K.V */ 34520fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34530fc1b451SAneesh Kumar K.V 34540fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34550fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34560fc1b451SAneesh Kumar K.V 34570fc1b451SAneesh Kumar K.V } else { 34588180a562SAneesh Kumar K.V /* 34598180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34608180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34618180a562SAneesh Kumar K.V * represent total number of blocks in 34628180a562SAneesh Kumar K.V * file system block size 34638180a562SAneesh Kumar K.V */ 34640fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34650fc1b451SAneesh Kumar K.V 34660fc1b451SAneesh Kumar K.V } 34670fc1b451SAneesh Kumar K.V 34685c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34695c93e8ecSZhang Yi res += ppb; 34705c93e8ecSZhang Yi res += ppb * ppb; 34715c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34725c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34735c93e8ecSZhang Yi meta_blocks = 1; 34745c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34755c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34765c93e8ecSZhang Yi /* Does block tree limit file size? */ 34775c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34785c93e8ecSZhang Yi goto check_lfs; 34795c93e8ecSZhang Yi 34805c93e8ecSZhang Yi res = upper_limit; 34815c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34825c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34830fc1b451SAneesh Kumar K.V /* indirect blocks */ 34840fc1b451SAneesh Kumar K.V meta_blocks = 1; 34855c93e8ecSZhang Yi upper_limit -= ppb; 34860fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34875c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34885c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34895c93e8ecSZhang Yi res -= meta_blocks; 34905c93e8ecSZhang Yi goto check_lfs; 34915c93e8ecSZhang Yi } 34925c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34935c93e8ecSZhang Yi upper_limit -= ppb * ppb; 34945c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 34955c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 34965c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 34975c93e8ecSZhang Yi res -= meta_blocks; 34985c93e8ecSZhang Yi check_lfs: 3499ac27a0ecSDave Kleikamp res <<= bits; 35000fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35010fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35020fc1b451SAneesh Kumar K.V 35035c93e8ecSZhang Yi return res; 3504ac27a0ecSDave Kleikamp } 3505ac27a0ecSDave Kleikamp 3506617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 350770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3508ac27a0ecSDave Kleikamp { 3509617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3510fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3511ac27a0ecSDave Kleikamp int has_super = 0; 3512ac27a0ecSDave Kleikamp 3513ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3514ac27a0ecSDave Kleikamp 3515e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 351670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3517ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3518617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3519ac27a0ecSDave Kleikamp has_super = 1; 35200b8e58a1SAndreas Dilger 3521bd63f6b0SDarrick J. Wong /* 3522bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3523bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3524bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3525bd63f6b0SDarrick J. Wong * compensate. 3526bd63f6b0SDarrick J. Wong */ 3527bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 352849598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3529bd63f6b0SDarrick J. Wong has_super++; 3530bd63f6b0SDarrick J. Wong 3531617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3532ac27a0ecSDave Kleikamp } 3533ac27a0ecSDave Kleikamp 3534c9de560dSAlex Tomas /** 3535c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3536c9de560dSAlex Tomas * @sbi: In memory super block info 3537c9de560dSAlex Tomas * 3538c9de560dSAlex Tomas * If we have specified it via mount option, then 3539c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3540c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3541c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3542c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3543c9de560dSAlex Tomas * 3544c9de560dSAlex Tomas */ 3545c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3546c9de560dSAlex Tomas { 3547c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3548c9de560dSAlex Tomas unsigned long stripe_width = 3549c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35503eb08658SDan Ehrenberg int ret; 3551c9de560dSAlex Tomas 3552c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35533eb08658SDan Ehrenberg ret = sbi->s_stripe; 35545469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35553eb08658SDan Ehrenberg ret = stripe_width; 35565469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35573eb08658SDan Ehrenberg ret = stride; 35583eb08658SDan Ehrenberg else 35593eb08658SDan Ehrenberg ret = 0; 3560c9de560dSAlex Tomas 35613eb08658SDan Ehrenberg /* 35623eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35633eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35643eb08658SDan Ehrenberg */ 35653eb08658SDan Ehrenberg if (ret <= 1) 35663eb08658SDan Ehrenberg ret = 0; 3567c9de560dSAlex Tomas 35683eb08658SDan Ehrenberg return ret; 3569c9de560dSAlex Tomas } 3570ac27a0ecSDave Kleikamp 3571a13fb1a4SEric Sandeen /* 3572a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3573a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3574a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3575a13fb1a4SEric Sandeen * 0 if it cannot be. 3576a13fb1a4SEric Sandeen */ 357725c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3578a13fb1a4SEric Sandeen { 3579e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3580a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3581a13fb1a4SEric Sandeen "Couldn't mount because of " 3582a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3583a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3584a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3585a13fb1a4SEric Sandeen return 0; 3586a13fb1a4SEric Sandeen } 3587a13fb1a4SEric Sandeen 35885298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3589c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3590c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3591c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3592c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3593c83ad55eSGabriel Krisman Bertazi return 0; 3594c83ad55eSGabriel Krisman Bertazi } 3595c83ad55eSGabriel Krisman Bertazi #endif 3596c83ad55eSGabriel Krisman Bertazi 3597a13fb1a4SEric Sandeen if (readonly) 3598a13fb1a4SEric Sandeen return 1; 3599a13fb1a4SEric Sandeen 3600e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36012cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36021751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36032cb5cc8bSDarrick J. Wong return 1; 36042cb5cc8bSDarrick J. Wong } 36052cb5cc8bSDarrick J. Wong 3606a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3607e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3608a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3609a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3610a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3611a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3612a13fb1a4SEric Sandeen return 0; 3613a13fb1a4SEric Sandeen } 3614e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3615bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3616bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3617bab08ab9STheodore Ts'o "extents feature\n"); 3618bab08ab9STheodore Ts'o return 0; 3619bab08ab9STheodore Ts'o } 36207c319d32SAditya Kali 36219db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3622d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3623d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36247c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3625d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3626689c958cSLi Xi return 0; 3627689c958cSLi Xi } 36287c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3629a13fb1a4SEric Sandeen return 1; 3630a13fb1a4SEric Sandeen } 3631a13fb1a4SEric Sandeen 363266e61a9eSTheodore Ts'o /* 363366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 363466e61a9eSTheodore Ts'o * on the file system 363566e61a9eSTheodore Ts'o */ 3636235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 363766e61a9eSTheodore Ts'o { 3638235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3639235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3640235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 364166e61a9eSTheodore Ts'o 364266e61a9eSTheodore Ts'o if (es->s_error_count) 3643ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3644ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 364566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 364666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36476a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36486a0678a7SArnd Bergmann sb->s_id, 36496a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 365066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 365166e61a9eSTheodore Ts'o es->s_first_error_func, 365266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 365366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3654651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 365566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 365666e61a9eSTheodore Ts'o if (es->s_first_error_block) 3657651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 365866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3659651e1c3bSJoe Perches printk(KERN_CONT "\n"); 366066e61a9eSTheodore Ts'o } 366166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36626a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36636a0678a7SArnd Bergmann sb->s_id, 36646a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 366566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 366666e61a9eSTheodore Ts'o es->s_last_error_func, 366766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 366866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3669651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 367066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 367166e61a9eSTheodore Ts'o if (es->s_last_error_block) 3672651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 367366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3674651e1c3bSJoe Perches printk(KERN_CONT "\n"); 367566e61a9eSTheodore Ts'o } 367666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 367766e61a9eSTheodore Ts'o } 367866e61a9eSTheodore Ts'o 3679bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3680bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3681bfff6873SLukas Czerner { 3682bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36833d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36843d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36853d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36863d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3687bfff6873SLukas Czerner int ret = 0; 368839fec688SShaoying Xu u64 start_time; 3689bfff6873SLukas Czerner 36903d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 36913d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 36923d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 36933d392b26STheodore Ts'o if (prefetch_ios) 36943d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 36953d392b26STheodore Ts'o prefetch_ios); 36963d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 36973d392b26STheodore Ts'o prefetch_ios); 36983d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 36993d392b26STheodore Ts'o ret = 1; 37003d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 37013d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37023d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37033d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37043d392b26STheodore Ts'o ret = 0; 37053d392b26STheodore Ts'o } 37063d392b26STheodore Ts'o } 37073d392b26STheodore Ts'o return ret; 37083d392b26STheodore Ts'o } 3709bfff6873SLukas Czerner 37103d392b26STheodore Ts'o for (; group < ngroups; group++) { 3711bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3712bfff6873SLukas Czerner if (!gdp) { 3713bfff6873SLukas Czerner ret = 1; 3714bfff6873SLukas Czerner break; 3715bfff6873SLukas Czerner } 3716bfff6873SLukas Czerner 3717bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3718bfff6873SLukas Czerner break; 3719bfff6873SLukas Czerner } 3720bfff6873SLukas Czerner 37217f511862STheodore Ts'o if (group >= ngroups) 3722bfff6873SLukas Czerner ret = 1; 3723bfff6873SLukas Czerner 3724bfff6873SLukas Czerner if (!ret) { 372539fec688SShaoying Xu start_time = ktime_get_real_ns(); 3726bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3727bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37283d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3729bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 373039fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 373139fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3732bfff6873SLukas Czerner } 3733bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3734bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3735bfff6873SLukas Czerner } 3736bfff6873SLukas Czerner return ret; 3737bfff6873SLukas Czerner } 3738bfff6873SLukas Czerner 3739bfff6873SLukas Czerner /* 3740bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37414ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3742bfff6873SLukas Czerner */ 3743bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3744bfff6873SLukas Czerner { 3745bfff6873SLukas Czerner if (!elr) 3746bfff6873SLukas Czerner return; 3747bfff6873SLukas Czerner 3748bfff6873SLukas Czerner list_del(&elr->lr_request); 37493d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3750bfff6873SLukas Czerner kfree(elr); 3751bfff6873SLukas Czerner } 3752bfff6873SLukas Czerner 3753bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3754bfff6873SLukas Czerner { 37551bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37561bb933fbSLukas Czerner if (!ext4_li_info) { 37571bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3758bfff6873SLukas Czerner return; 37591bb933fbSLukas Czerner } 3760bfff6873SLukas Czerner 3761bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37621bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3763bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37641bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3765bfff6873SLukas Czerner } 3766bfff6873SLukas Czerner 37678f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37688f1f7453SEric Sandeen 3769bfff6873SLukas Czerner /* 3770bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3771bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3772bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3773bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3774bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3775bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3776bfff6873SLukas Czerner * next waking time and put itself into sleep. 3777bfff6873SLukas Czerner */ 3778bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3779bfff6873SLukas Czerner { 3780c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3781bfff6873SLukas Czerner struct list_head *pos, *n; 3782bfff6873SLukas Czerner struct ext4_li_request *elr; 37834ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3784bfff6873SLukas Czerner 3785bfff6873SLukas Czerner BUG_ON(NULL == eli); 37863b575495SLalith Rajendran set_freezable(); 3787bfff6873SLukas Czerner 3788bfff6873SLukas Czerner cont_thread: 3789bfff6873SLukas Czerner while (true) { 3790bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3791bfff6873SLukas Czerner 3792bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3793bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3794bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3795bfff6873SLukas Czerner goto exit_thread; 3796bfff6873SLukas Czerner } 3797bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3798e22834f0SDmitry Monakhov int err = 0; 3799e22834f0SDmitry Monakhov int progress = 0; 3800bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3801bfff6873SLukas Czerner lr_request); 3802bfff6873SLukas Czerner 3803e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3804e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3805e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3806e22834f0SDmitry Monakhov continue; 3807e22834f0SDmitry Monakhov } 3808e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3809e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3810e22834f0SDmitry Monakhov progress = 1; 3811e22834f0SDmitry Monakhov /* 3812e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3813e22834f0SDmitry Monakhov * be removed from the list, it is 3814e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3815e22834f0SDmitry Monakhov */ 3816e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3817e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3818e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3819e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3820e22834f0SDmitry Monakhov n = pos->next; 3821e22834f0SDmitry Monakhov } 3822e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3823e22834f0SDmitry Monakhov } 3824b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3825e22834f0SDmitry Monakhov if (err) { 3826bfff6873SLukas Czerner ext4_remove_li_request(elr); 3827bfff6873SLukas Czerner continue; 3828bfff6873SLukas Czerner } 3829e22834f0SDmitry Monakhov if (!progress) { 3830e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 38318032bf12SJason A. Donenfeld get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3832b2c78cd0STheodore Ts'o } 3833bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3834bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3835bfff6873SLukas Czerner } 3836bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3837bfff6873SLukas Czerner 3838a0acae0eSTejun Heo try_to_freeze(); 3839bfff6873SLukas Czerner 38404ed5c033SLukas Czerner cur = jiffies; 38414ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3842f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3843bfff6873SLukas Czerner cond_resched(); 3844bfff6873SLukas Czerner continue; 3845bfff6873SLukas Czerner } 3846bfff6873SLukas Czerner 38474ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38484ed5c033SLukas Czerner 38498f1f7453SEric Sandeen if (kthread_should_stop()) { 38508f1f7453SEric Sandeen ext4_clear_request_list(); 38518f1f7453SEric Sandeen goto exit_thread; 38528f1f7453SEric Sandeen } 3853bfff6873SLukas Czerner } 3854bfff6873SLukas Czerner 3855bfff6873SLukas Czerner exit_thread: 3856bfff6873SLukas Czerner /* 3857bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3858bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3859bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3860bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3861bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3862bfff6873SLukas Czerner * new one. 3863bfff6873SLukas Czerner */ 3864bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3865bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3866bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3867bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3868bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3869bfff6873SLukas Czerner goto cont_thread; 3870bfff6873SLukas Czerner } 3871bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3872bfff6873SLukas Czerner kfree(ext4_li_info); 3873bfff6873SLukas Czerner ext4_li_info = NULL; 3874bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3875bfff6873SLukas Czerner 3876bfff6873SLukas Czerner return 0; 3877bfff6873SLukas Czerner } 3878bfff6873SLukas Czerner 3879bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3880bfff6873SLukas Czerner { 3881bfff6873SLukas Czerner struct list_head *pos, *n; 3882bfff6873SLukas Czerner struct ext4_li_request *elr; 3883bfff6873SLukas Czerner 3884bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3885bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3886bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3887bfff6873SLukas Czerner lr_request); 3888bfff6873SLukas Czerner ext4_remove_li_request(elr); 3889bfff6873SLukas Czerner } 3890bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3891bfff6873SLukas Czerner } 3892bfff6873SLukas Czerner 3893bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3894bfff6873SLukas Czerner { 38958f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 38968f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 38978f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 38988f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3899bfff6873SLukas Czerner ext4_clear_request_list(); 3900bfff6873SLukas Czerner kfree(ext4_li_info); 3901bfff6873SLukas Czerner ext4_li_info = NULL; 390292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3903bfff6873SLukas Czerner "initialization thread\n", 3904bfff6873SLukas Czerner err); 3905bfff6873SLukas Czerner return err; 3906bfff6873SLukas Czerner } 3907bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3908bfff6873SLukas Czerner return 0; 3909bfff6873SLukas Czerner } 3910bfff6873SLukas Czerner 3911bfff6873SLukas Czerner /* 3912bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3913bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3914bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3915bfff6873SLukas Czerner * groups and return total number of groups. 3916bfff6873SLukas Czerner */ 3917bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3918bfff6873SLukas Czerner { 3919bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3920bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3921bfff6873SLukas Czerner 39228844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39238844618dSTheodore Ts'o return ngroups; 39248844618dSTheodore Ts'o 3925bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3926bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3927bfff6873SLukas Czerner if (!gdp) 3928bfff6873SLukas Czerner continue; 3929bfff6873SLukas Czerner 393050122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3931bfff6873SLukas Czerner break; 3932bfff6873SLukas Czerner } 3933bfff6873SLukas Czerner 3934bfff6873SLukas Czerner return group; 3935bfff6873SLukas Czerner } 3936bfff6873SLukas Czerner 3937bfff6873SLukas Czerner static int ext4_li_info_new(void) 3938bfff6873SLukas Czerner { 3939bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3940bfff6873SLukas Czerner 3941bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3942bfff6873SLukas Czerner if (!eli) 3943bfff6873SLukas Czerner return -ENOMEM; 3944bfff6873SLukas Czerner 3945bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3946bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3947bfff6873SLukas Czerner 3948bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3949bfff6873SLukas Czerner 3950bfff6873SLukas Czerner ext4_li_info = eli; 3951bfff6873SLukas Czerner 3952bfff6873SLukas Czerner return 0; 3953bfff6873SLukas Czerner } 3954bfff6873SLukas Czerner 3955bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3956bfff6873SLukas Czerner ext4_group_t start) 3957bfff6873SLukas Czerner { 3958bfff6873SLukas Czerner struct ext4_li_request *elr; 3959bfff6873SLukas Czerner 3960bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3961bfff6873SLukas Czerner if (!elr) 3962bfff6873SLukas Czerner return NULL; 3963bfff6873SLukas Czerner 3964bfff6873SLukas Czerner elr->lr_super = sb; 39653d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 396621175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39673d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3968bfff6873SLukas Czerner elr->lr_next_group = start; 396921175ca4SHarshad Shirwadkar } else { 397021175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39713d392b26STheodore Ts'o } 3972bfff6873SLukas Czerner 3973bfff6873SLukas Czerner /* 3974bfff6873SLukas Czerner * Randomize first schedule time of the request to 3975bfff6873SLukas Czerner * spread the inode table initialization requests 3976bfff6873SLukas Czerner * better. 3977bfff6873SLukas Czerner */ 39788032bf12SJason A. Donenfeld elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3979bfff6873SLukas Czerner return elr; 3980bfff6873SLukas Czerner } 3981bfff6873SLukas Czerner 39827f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3983bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3984bfff6873SLukas Czerner { 3985bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39867f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 398749598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39886c5a6cb9SAndrew Morton int ret = 0; 3989bfff6873SLukas Czerner 39907f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 399151ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 399251ce6511SLukas Czerner /* 399351ce6511SLukas Czerner * Reset timeout so it can be computed again, because 399451ce6511SLukas Czerner * s_li_wait_mult might have changed. 399551ce6511SLukas Czerner */ 399651ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 39977f511862STheodore Ts'o goto out; 399851ce6511SLukas Czerner } 3999bfff6873SLukas Czerner 4000426d15adSJosh Triplett if (sb_rdonly(sb) || 4001426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 4002426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 40037f511862STheodore Ts'o goto out; 4004bfff6873SLukas Czerner 4005bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40067f511862STheodore Ts'o if (!elr) { 40077f511862STheodore Ts'o ret = -ENOMEM; 40087f511862STheodore Ts'o goto out; 40097f511862STheodore Ts'o } 4010bfff6873SLukas Czerner 4011bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4012bfff6873SLukas Czerner ret = ext4_li_info_new(); 4013bfff6873SLukas Czerner if (ret) 4014bfff6873SLukas Czerner goto out; 4015bfff6873SLukas Czerner } 4016bfff6873SLukas Czerner 4017bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4018bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4019bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4020bfff6873SLukas Czerner 4021bfff6873SLukas Czerner sbi->s_li_request = elr; 402246e4690bSTao Ma /* 402346e4690bSTao Ma * set elr to NULL here since it has been inserted to 402446e4690bSTao Ma * the request_list and the removal and free of it is 402546e4690bSTao Ma * handled by ext4_clear_request_list from now on. 402646e4690bSTao Ma */ 402746e4690bSTao Ma elr = NULL; 4028bfff6873SLukas Czerner 4029bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4030bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4031bfff6873SLukas Czerner if (ret) 4032bfff6873SLukas Czerner goto out; 4033bfff6873SLukas Czerner } 4034bfff6873SLukas Czerner out: 4035bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4036beed5ecbSNicolas Kaiser if (ret) 4037bfff6873SLukas Czerner kfree(elr); 4038bfff6873SLukas Czerner return ret; 4039bfff6873SLukas Czerner } 4040bfff6873SLukas Czerner 4041bfff6873SLukas Czerner /* 4042bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4043bfff6873SLukas Czerner * module unload. 4044bfff6873SLukas Czerner */ 4045bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4046bfff6873SLukas Czerner { 4047bfff6873SLukas Czerner /* 4048bfff6873SLukas Czerner * If thread exited earlier 4049bfff6873SLukas Czerner * there's nothing to be done. 4050bfff6873SLukas Czerner */ 40518f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4052bfff6873SLukas Czerner return; 4053bfff6873SLukas Czerner 40548f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4055bfff6873SLukas Czerner } 4056bfff6873SLukas Czerner 405725ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 405825ed6e8aSDarrick J. Wong { 405925ed6e8aSDarrick J. Wong int ret = 1; 406025ed6e8aSDarrick J. Wong int compat, incompat; 406125ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 406225ed6e8aSDarrick J. Wong 40639aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4064db9ee220SDarrick J. Wong /* journal checksum v3 */ 406525ed6e8aSDarrick J. Wong compat = 0; 4066db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 406725ed6e8aSDarrick J. Wong } else { 406825ed6e8aSDarrick J. Wong /* journal checksum v1 */ 406925ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 407025ed6e8aSDarrick J. Wong incompat = 0; 407125ed6e8aSDarrick J. Wong } 407225ed6e8aSDarrick J. Wong 4073feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4074feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4075feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4076feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 407725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 407825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 407925ed6e8aSDarrick J. Wong compat, 0, 408025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 408125ed6e8aSDarrick J. Wong incompat); 408225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 408325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 408425ed6e8aSDarrick J. Wong compat, 0, 408525ed6e8aSDarrick J. Wong incompat); 408625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 408725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 408825ed6e8aSDarrick J. Wong } else { 4089feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4090feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 409125ed6e8aSDarrick J. Wong } 409225ed6e8aSDarrick J. Wong 409325ed6e8aSDarrick J. Wong return ret; 409425ed6e8aSDarrick J. Wong } 409525ed6e8aSDarrick J. Wong 4096952fc18eSTheodore Ts'o /* 4097952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4098952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4099952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4100952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4101952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4102952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4103952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4104952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4105952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4106952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4107952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4108952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4109952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4110952fc18eSTheodore Ts'o */ 4111952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4112952fc18eSTheodore Ts'o char *buf) 4113952fc18eSTheodore Ts'o { 4114952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4115952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4116952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4117952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4118952fc18eSTheodore Ts'o int s, j, count = 0; 411910b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4120952fc18eSTheodore Ts'o 4121e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 412210b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 412310b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41240548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41250548bbb8STheodore Ts'o 4126952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4127952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4128952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4129952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4130952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4131952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4132952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4133952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4134952fc18eSTheodore Ts'o count++; 4135952fc18eSTheodore Ts'o } 4136952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4137952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4138952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4139952fc18eSTheodore Ts'o count++; 4140952fc18eSTheodore Ts'o } 4141952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4142952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4143952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4144952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4145952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4146952fc18eSTheodore Ts'o count++; 4147952fc18eSTheodore Ts'o } 4148952fc18eSTheodore Ts'o if (i != grp) 4149952fc18eSTheodore Ts'o continue; 4150952fc18eSTheodore Ts'o s = 0; 4151952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4152952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4153952fc18eSTheodore Ts'o count++; 4154952fc18eSTheodore Ts'o } 4155c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4156c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4157c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4158c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4159c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4160952fc18eSTheodore Ts'o } 4161c48ae41bSTheodore Ts'o count += j; 4162c48ae41bSTheodore Ts'o for (; j > 0; j--) 4163c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4164952fc18eSTheodore Ts'o } 4165952fc18eSTheodore Ts'o if (!count) 4166952fc18eSTheodore Ts'o return 0; 4167952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4168952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4169952fc18eSTheodore Ts'o } 4170952fc18eSTheodore Ts'o 4171952fc18eSTheodore Ts'o /* 4172952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4173952fc18eSTheodore Ts'o */ 4174952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4175952fc18eSTheodore Ts'o { 4176952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4177952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41783c816dedSEric Whitney struct inode *j_inode; 41793c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4180952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4181952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41824fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4183952fc18eSTheodore Ts'o 4184952fc18eSTheodore Ts'o if (!buf) 4185952fc18eSTheodore Ts'o return -ENOMEM; 4186952fc18eSTheodore Ts'o 4187952fc18eSTheodore Ts'o /* 4188952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4189952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4190952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4191952fc18eSTheodore Ts'o */ 4192952fc18eSTheodore Ts'o 4193952fc18eSTheodore Ts'o /* 4194952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4195952fc18eSTheodore Ts'o */ 4196952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4197952fc18eSTheodore Ts'o 4198952fc18eSTheodore Ts'o /* 4199952fc18eSTheodore Ts'o * Add the overhead found in each block group 4200952fc18eSTheodore Ts'o */ 4201952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4202952fc18eSTheodore Ts'o int blks; 4203952fc18eSTheodore Ts'o 4204952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4205952fc18eSTheodore Ts'o overhead += blks; 4206952fc18eSTheodore Ts'o if (blks) 4207952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4208952fc18eSTheodore Ts'o cond_resched(); 4209952fc18eSTheodore Ts'o } 42103c816dedSEric Whitney 42113c816dedSEric Whitney /* 42123c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42133c816dedSEric Whitney * loaded or not 42143c816dedSEric Whitney */ 4215ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4216ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4217f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4218f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42193c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 42203c816dedSEric Whitney if (j_inode) { 42213c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42223c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42233c816dedSEric Whitney iput(j_inode); 42243c816dedSEric Whitney } else { 42253c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42263c816dedSEric Whitney } 42273c816dedSEric Whitney } 4228952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4229952fc18eSTheodore Ts'o smp_wmb(); 4230952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4231952fc18eSTheodore Ts'o return 0; 4232952fc18eSTheodore Ts'o } 4233952fc18eSTheodore Ts'o 4234b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 423527dd4385SLukas Czerner { 423627dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4237b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 423827dd4385SLukas Czerner 423927dd4385SLukas Czerner /* 424030fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 424130fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 424230fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 424330fac0f7SJan Kara * to keep ext2/3 backward compatibility. 424430fac0f7SJan Kara */ 4245e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4246b5799018STheodore Ts'o return; 424730fac0f7SJan Kara /* 424827dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 424927dd4385SLukas Czerner * This should cover the situations where we can not afford to run 425027dd4385SLukas Czerner * out of space like for example punch hole, or converting 4251556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 425227dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 425327dd4385SLukas Czerner * very rare. 425427dd4385SLukas Czerner */ 4255b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4256b5799018STheodore Ts'o sbi->s_cluster_bits); 425727dd4385SLukas Czerner 425827dd4385SLukas Czerner do_div(resv_clusters, 50); 425927dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 426027dd4385SLukas Czerner 4261b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 426227dd4385SLukas Czerner } 426327dd4385SLukas Czerner 4264ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4265ca9b404fSRoman Anufriev { 4266ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4267ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4268ca9b404fSRoman Anufriev return "none"; 4269ca9b404fSRoman Anufriev 4270ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4271ca9b404fSRoman Anufriev return "journalled"; 4272ca9b404fSRoman Anufriev else 4273ca9b404fSRoman Anufriev return "writeback"; 4274ca9b404fSRoman Anufriev #else 4275ca9b404fSRoman Anufriev return "disabled"; 4276ca9b404fSRoman Anufriev #endif 4277ca9b404fSRoman Anufriev } 4278ca9b404fSRoman Anufriev 4279188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4280188c299eSJan Kara enum ext4_journal_trigger_type type, 4281188c299eSJan Kara void (*trigger)( 4282188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4283188c299eSJan Kara struct buffer_head *bh, 4284188c299eSJan Kara void *mapped_data, 4285188c299eSJan Kara size_t size)) 4286188c299eSJan Kara { 4287188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4288188c299eSJan Kara 4289188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4290188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4291188c299eSJan Kara } 4292188c299eSJan Kara 42937edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4294ac27a0ecSDave Kleikamp { 42957edfd85bSLukas Czerner if (!sbi) 42967edfd85bSLukas Czerner return; 42977edfd85bSLukas Czerner 42987edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 42998012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43007edfd85bSLukas Czerner kfree(sbi); 43017edfd85bSLukas Czerner } 43027edfd85bSLukas Czerner 43037edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43047edfd85bSLukas Czerner { 43057edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43067edfd85bSLukas Czerner 43077edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43087edfd85bSLukas Czerner if (!sbi) 43097edfd85bSLukas Czerner return NULL; 43107edfd85bSLukas Czerner 43118012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 43128012b866SShiyang Ruan NULL, NULL); 43137edfd85bSLukas Czerner 43147edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43157edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43167edfd85bSLukas Czerner 43177edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43187edfd85bSLukas Czerner goto err_out; 43197edfd85bSLukas Czerner 43207edfd85bSLukas Czerner sb->s_fs_info = sbi; 43217edfd85bSLukas Czerner sbi->s_sb = sb; 43227edfd85bSLukas Czerner return sbi; 43237edfd85bSLukas Czerner err_out: 43248012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43257edfd85bSLukas Czerner kfree(sbi); 43267edfd85bSLukas Czerner return NULL; 43277edfd85bSLukas Czerner } 43287edfd85bSLukas Czerner 43295f6d662dSJason Yan static void ext4_set_def_opts(struct super_block *sb, 43305f6d662dSJason Yan struct ext4_super_block *es) 43315f6d662dSJason Yan { 43325f6d662dSJason Yan unsigned long def_mount_opts; 43335f6d662dSJason Yan 43345f6d662dSJason Yan /* Set defaults before we parse the mount options */ 43355f6d662dSJason Yan def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 43365f6d662dSJason Yan set_opt(sb, INIT_INODE_TABLE); 43375f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DEBUG) 43385f6d662dSJason Yan set_opt(sb, DEBUG); 43395f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 43405f6d662dSJason Yan set_opt(sb, GRPID); 43415f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_UID16) 43425f6d662dSJason Yan set_opt(sb, NO_UID32); 43435f6d662dSJason Yan /* xattr user namespace & acls are now defaulted on */ 43445f6d662dSJason Yan set_opt(sb, XATTR_USER); 43455f6d662dSJason Yan #ifdef CONFIG_EXT4_FS_POSIX_ACL 43465f6d662dSJason Yan set_opt(sb, POSIX_ACL); 43475f6d662dSJason Yan #endif 43485f6d662dSJason Yan if (ext4_has_feature_fast_commit(sb)) 43495f6d662dSJason Yan set_opt2(sb, JOURNAL_FAST_COMMIT); 43505f6d662dSJason Yan /* don't forget to enable journal_csum when metadata_csum is enabled. */ 43515f6d662dSJason Yan if (ext4_has_metadata_csum(sb)) 43525f6d662dSJason Yan set_opt(sb, JOURNAL_CHECKSUM); 43535f6d662dSJason Yan 43545f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 43555f6d662dSJason Yan set_opt(sb, JOURNAL_DATA); 43565f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 43575f6d662dSJason Yan set_opt(sb, ORDERED_DATA); 43585f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 43595f6d662dSJason Yan set_opt(sb, WRITEBACK_DATA); 43605f6d662dSJason Yan 43615f6d662dSJason Yan if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) 43625f6d662dSJason Yan set_opt(sb, ERRORS_PANIC); 43635f6d662dSJason Yan else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) 43645f6d662dSJason Yan set_opt(sb, ERRORS_CONT); 43655f6d662dSJason Yan else 43665f6d662dSJason Yan set_opt(sb, ERRORS_RO); 43675f6d662dSJason Yan /* block_validity enabled by default; disable with noblock_validity */ 43685f6d662dSJason Yan set_opt(sb, BLOCK_VALIDITY); 43695f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DISCARD) 43705f6d662dSJason Yan set_opt(sb, DISCARD); 43715f6d662dSJason Yan 43725f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 43735f6d662dSJason Yan set_opt(sb, BARRIER); 43745f6d662dSJason Yan 43755f6d662dSJason Yan /* 43765f6d662dSJason Yan * enable delayed allocation by default 43775f6d662dSJason Yan * Use -o nodelalloc to turn it off 43785f6d662dSJason Yan */ 43795f6d662dSJason Yan if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 43805f6d662dSJason Yan ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 43815f6d662dSJason Yan set_opt(sb, DELALLOC); 43823df11e27SJason Yan 43833df11e27SJason Yan if (sb->s_blocksize == PAGE_SIZE) 43843df11e27SJason Yan set_opt(sb, DIOREAD_NOLOCK); 43855f6d662dSJason Yan } 43865f6d662dSJason Yan 4387c8267c51SJason Yan static int ext4_handle_clustersize(struct super_block *sb) 43884a8557b0SJason Yan { 43894a8557b0SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 43904a8557b0SJason Yan struct ext4_super_block *es = sbi->s_es; 43914a8557b0SJason Yan int clustersize; 43924a8557b0SJason Yan 43934a8557b0SJason Yan /* Handle clustersize */ 43944a8557b0SJason Yan clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 43954a8557b0SJason Yan if (ext4_has_feature_bigalloc(sb)) { 4396c8267c51SJason Yan if (clustersize < sb->s_blocksize) { 43974a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43984a8557b0SJason Yan "cluster size (%d) smaller than " 4399c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44004a8557b0SJason Yan return -EINVAL; 44014a8557b0SJason Yan } 44024a8557b0SJason Yan sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 44034a8557b0SJason Yan le32_to_cpu(es->s_log_block_size); 44044a8557b0SJason Yan sbi->s_clusters_per_group = 44054a8557b0SJason Yan le32_to_cpu(es->s_clusters_per_group); 4406c8267c51SJason Yan if (sbi->s_clusters_per_group > sb->s_blocksize * 8) { 44074a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44084a8557b0SJason Yan "#clusters per group too big: %lu", 44094a8557b0SJason Yan sbi->s_clusters_per_group); 44104a8557b0SJason Yan return -EINVAL; 44114a8557b0SJason Yan } 44124a8557b0SJason Yan if (sbi->s_blocks_per_group != 4413c8267c51SJason Yan (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) { 44144a8557b0SJason Yan ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 44154a8557b0SJason Yan "clusters per group (%lu) inconsistent", 44164a8557b0SJason Yan sbi->s_blocks_per_group, 44174a8557b0SJason Yan sbi->s_clusters_per_group); 44184a8557b0SJason Yan return -EINVAL; 44194a8557b0SJason Yan } 44204a8557b0SJason Yan } else { 4421c8267c51SJason Yan if (clustersize != sb->s_blocksize) { 44224a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44234a8557b0SJason Yan "fragment/cluster size (%d) != " 4424c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44254a8557b0SJason Yan return -EINVAL; 44264a8557b0SJason Yan } 4427c8267c51SJason Yan if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { 44284a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44294a8557b0SJason Yan "#blocks per group too big: %lu", 44304a8557b0SJason Yan sbi->s_blocks_per_group); 44314a8557b0SJason Yan return -EINVAL; 44324a8557b0SJason Yan } 44334a8557b0SJason Yan sbi->s_clusters_per_group = sbi->s_blocks_per_group; 44344a8557b0SJason Yan sbi->s_cluster_bits = 0; 44354a8557b0SJason Yan } 4436c8267c51SJason Yan sbi->s_cluster_ratio = clustersize / sb->s_blocksize; 44374a8557b0SJason Yan 44384a8557b0SJason Yan /* Do we have standard group size of clustersize * 8 blocks ? */ 44394a8557b0SJason Yan if (sbi->s_blocks_per_group == clustersize << 3) 44404a8557b0SJason Yan set_opt2(sb, STD_GROUP_SIZE); 44414a8557b0SJason Yan 44424a8557b0SJason Yan return 0; 44434a8557b0SJason Yan } 44444a8557b0SJason Yan 4445f7314a67SJason Yan static void ext4_fast_commit_init(struct super_block *sb) 4446f7314a67SJason Yan { 4447f7314a67SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4448f7314a67SJason Yan 4449f7314a67SJason Yan /* Initialize fast commit stuff */ 4450f7314a67SJason Yan atomic_set(&sbi->s_fc_subtid, 0); 4451f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4452f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4453f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4454f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4455f7314a67SJason Yan sbi->s_fc_bytes = 0; 4456f7314a67SJason Yan ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 4457f7314a67SJason Yan sbi->s_fc_ineligible_tid = 0; 4458f7314a67SJason Yan spin_lock_init(&sbi->s_fc_lock); 4459f7314a67SJason Yan memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 4460f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions = NULL; 4461f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_size = 0; 4462f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_used = 0; 4463f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_valid = 0; 4464f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes = NULL; 4465f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 4466f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4467f7314a67SJason Yan } 4468f7314a67SJason Yan 44690e495f7cSJason Yan static int ext4_inode_info_init(struct super_block *sb, 4470c8267c51SJason Yan struct ext4_super_block *es) 44710e495f7cSJason Yan { 44720e495f7cSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44730e495f7cSJason Yan 44740e495f7cSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44750e495f7cSJason Yan sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44760e495f7cSJason Yan sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44770e495f7cSJason Yan } else { 44780e495f7cSJason Yan sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44790e495f7cSJason Yan sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 44800e495f7cSJason Yan if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 44810e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 44820e495f7cSJason Yan sbi->s_first_ino); 44830e495f7cSJason Yan return -EINVAL; 44840e495f7cSJason Yan } 44850e495f7cSJason Yan if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 44860e495f7cSJason Yan (!is_power_of_2(sbi->s_inode_size)) || 4487c8267c51SJason Yan (sbi->s_inode_size > sb->s_blocksize)) { 44880e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44890e495f7cSJason Yan "unsupported inode size: %d", 44900e495f7cSJason Yan sbi->s_inode_size); 4491c8267c51SJason Yan ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize); 44920e495f7cSJason Yan return -EINVAL; 44930e495f7cSJason Yan } 44940e495f7cSJason Yan /* 44950e495f7cSJason Yan * i_atime_extra is the last extra field available for 44960e495f7cSJason Yan * [acm]times in struct ext4_inode. Checking for that 44970e495f7cSJason Yan * field should suffice to ensure we have extra space 44980e495f7cSJason Yan * for all three. 44990e495f7cSJason Yan */ 45000e495f7cSJason Yan if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45010e495f7cSJason Yan sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45020e495f7cSJason Yan sb->s_time_gran = 1; 45030e495f7cSJason Yan sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45040e495f7cSJason Yan } else { 45050e495f7cSJason Yan sb->s_time_gran = NSEC_PER_SEC; 45060e495f7cSJason Yan sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45070e495f7cSJason Yan } 45080e495f7cSJason Yan sb->s_time_min = EXT4_TIMESTAMP_MIN; 45090e495f7cSJason Yan } 45100e495f7cSJason Yan 45110e495f7cSJason Yan if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45120e495f7cSJason Yan sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45130e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE; 45140e495f7cSJason Yan if (ext4_has_feature_extra_isize(sb)) { 45150e495f7cSJason Yan unsigned v, max = (sbi->s_inode_size - 45160e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE); 45170e495f7cSJason Yan 45180e495f7cSJason Yan v = le16_to_cpu(es->s_want_extra_isize); 45190e495f7cSJason Yan if (v > max) { 45200e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45210e495f7cSJason Yan "bad s_want_extra_isize: %d", v); 45220e495f7cSJason Yan return -EINVAL; 45230e495f7cSJason Yan } 45240e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45250e495f7cSJason Yan sbi->s_want_extra_isize = v; 45260e495f7cSJason Yan 45270e495f7cSJason Yan v = le16_to_cpu(es->s_min_extra_isize); 45280e495f7cSJason Yan if (v > max) { 45290e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45300e495f7cSJason Yan "bad s_min_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 } 45370e495f7cSJason Yan 45380e495f7cSJason Yan return 0; 45390e495f7cSJason Yan } 45400e495f7cSJason Yan 454139c135b0SJason Yan #if IS_ENABLED(CONFIG_UNICODE) 454239c135b0SJason Yan static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 454339c135b0SJason Yan { 454439c135b0SJason Yan const struct ext4_sb_encodings *encoding_info; 454539c135b0SJason Yan struct unicode_map *encoding; 454639c135b0SJason Yan __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 454739c135b0SJason Yan 454839c135b0SJason Yan if (!ext4_has_feature_casefold(sb) || sb->s_encoding) 454939c135b0SJason Yan return 0; 455039c135b0SJason Yan 455139c135b0SJason Yan encoding_info = ext4_sb_read_encoding(es); 455239c135b0SJason Yan if (!encoding_info) { 455339c135b0SJason Yan ext4_msg(sb, KERN_ERR, 455439c135b0SJason Yan "Encoding requested by superblock is unknown"); 455539c135b0SJason Yan return -EINVAL; 455639c135b0SJason Yan } 455739c135b0SJason Yan 455839c135b0SJason Yan encoding = utf8_load(encoding_info->version); 455939c135b0SJason Yan if (IS_ERR(encoding)) { 456039c135b0SJason Yan ext4_msg(sb, KERN_ERR, 456139c135b0SJason Yan "can't mount with superblock charset: %s-%u.%u.%u " 456239c135b0SJason Yan "not supported by the kernel. flags: 0x%x.", 456339c135b0SJason Yan encoding_info->name, 456439c135b0SJason Yan unicode_major(encoding_info->version), 456539c135b0SJason Yan unicode_minor(encoding_info->version), 456639c135b0SJason Yan unicode_rev(encoding_info->version), 456739c135b0SJason Yan encoding_flags); 456839c135b0SJason Yan return -EINVAL; 456939c135b0SJason Yan } 457039c135b0SJason Yan ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 457139c135b0SJason Yan "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 457239c135b0SJason Yan unicode_major(encoding_info->version), 457339c135b0SJason Yan unicode_minor(encoding_info->version), 457439c135b0SJason Yan unicode_rev(encoding_info->version), 457539c135b0SJason Yan encoding_flags); 457639c135b0SJason Yan 457739c135b0SJason Yan sb->s_encoding = encoding; 457839c135b0SJason Yan sb->s_encoding_flags = encoding_flags; 457939c135b0SJason Yan 458039c135b0SJason Yan return 0; 458139c135b0SJason Yan } 458239c135b0SJason Yan #else 458339c135b0SJason Yan static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 458439c135b0SJason Yan { 458539c135b0SJason Yan return 0; 458639c135b0SJason Yan } 458739c135b0SJason Yan #endif 458839c135b0SJason Yan 4589b26458d1SJason Yan static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) 4590b26458d1SJason Yan { 4591b26458d1SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4592b26458d1SJason Yan 4593b26458d1SJason Yan /* Warn if metadata_csum and gdt_csum are both set. */ 4594b26458d1SJason Yan if (ext4_has_feature_metadata_csum(sb) && 4595b26458d1SJason Yan ext4_has_feature_gdt_csum(sb)) 4596b26458d1SJason Yan ext4_warning(sb, "metadata_csum and uninit_bg are " 4597b26458d1SJason Yan "redundant flags; please run fsck."); 4598b26458d1SJason Yan 4599b26458d1SJason Yan /* Check for a known checksum algorithm */ 4600b26458d1SJason Yan if (!ext4_verify_csum_type(sb, es)) { 4601b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4602b26458d1SJason Yan "unknown checksum algorithm."); 4603b26458d1SJason Yan return -EINVAL; 4604b26458d1SJason Yan } 4605b26458d1SJason Yan ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 4606b26458d1SJason Yan ext4_orphan_file_block_trigger); 4607b26458d1SJason Yan 4608b26458d1SJason Yan /* Load the checksum driver */ 4609b26458d1SJason Yan sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 4610b26458d1SJason Yan if (IS_ERR(sbi->s_chksum_driver)) { 4611b26458d1SJason Yan int ret = PTR_ERR(sbi->s_chksum_driver); 4612b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 4613b26458d1SJason Yan sbi->s_chksum_driver = NULL; 4614b26458d1SJason Yan return ret; 4615b26458d1SJason Yan } 4616b26458d1SJason Yan 4617b26458d1SJason Yan /* Check superblock checksum */ 4618b26458d1SJason Yan if (!ext4_superblock_csum_verify(sb, es)) { 4619b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4620b26458d1SJason Yan "invalid superblock checksum. Run e2fsck?"); 4621b26458d1SJason Yan return -EFSBADCRC; 4622b26458d1SJason Yan } 4623b26458d1SJason Yan 4624b26458d1SJason Yan /* Precompute checksum seed for all metadata */ 4625b26458d1SJason Yan if (ext4_has_feature_csum_seed(sb)) 4626b26458d1SJason Yan sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4627b26458d1SJason Yan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4628b26458d1SJason Yan sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4629b26458d1SJason Yan sizeof(es->s_uuid)); 4630b26458d1SJason Yan return 0; 4631b26458d1SJason Yan } 4632b26458d1SJason Yan 4633d7f3542bSJason Yan static int ext4_check_feature_compatibility(struct super_block *sb, 4634d7f3542bSJason Yan struct ext4_super_block *es, 4635d7f3542bSJason Yan int silent) 4636d7f3542bSJason Yan { 4637d7f3542bSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4638d7f3542bSJason Yan (ext4_has_compat_features(sb) || 4639d7f3542bSJason Yan ext4_has_ro_compat_features(sb) || 4640d7f3542bSJason Yan ext4_has_incompat_features(sb))) 4641d7f3542bSJason Yan ext4_msg(sb, KERN_WARNING, 4642d7f3542bSJason Yan "feature flags set on rev 0 fs, " 4643d7f3542bSJason Yan "running e2fsck is recommended"); 4644d7f3542bSJason Yan 4645d7f3542bSJason Yan if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4646d7f3542bSJason Yan set_opt2(sb, HURD_COMPAT); 4647d7f3542bSJason Yan if (ext4_has_feature_64bit(sb)) { 4648d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4649d7f3542bSJason Yan "The Hurd can't support 64-bit file systems"); 4650d7f3542bSJason Yan return -EINVAL; 4651d7f3542bSJason Yan } 4652d7f3542bSJason Yan 4653d7f3542bSJason Yan /* 4654d7f3542bSJason Yan * ea_inode feature uses l_i_version field which is not 4655d7f3542bSJason Yan * available in HURD_COMPAT mode. 4656d7f3542bSJason Yan */ 4657d7f3542bSJason Yan if (ext4_has_feature_ea_inode(sb)) { 4658d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4659d7f3542bSJason Yan "ea_inode feature is not supported for Hurd"); 4660d7f3542bSJason Yan return -EINVAL; 4661d7f3542bSJason Yan } 4662d7f3542bSJason Yan } 4663d7f3542bSJason Yan 4664d7f3542bSJason Yan if (IS_EXT2_SB(sb)) { 4665d7f3542bSJason Yan if (ext2_feature_set_ok(sb)) 4666d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 4667d7f3542bSJason Yan "using the ext4 subsystem"); 4668d7f3542bSJason Yan else { 4669d7f3542bSJason Yan /* 4670d7f3542bSJason Yan * If we're probing be silent, if this looks like 4671d7f3542bSJason Yan * it's actually an ext[34] filesystem. 4672d7f3542bSJason Yan */ 4673d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4674d7f3542bSJason Yan return -EINVAL; 4675d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 4676d7f3542bSJason Yan "to feature incompatibilities"); 4677d7f3542bSJason Yan return -EINVAL; 4678d7f3542bSJason Yan } 4679d7f3542bSJason Yan } 4680d7f3542bSJason Yan 4681d7f3542bSJason Yan if (IS_EXT3_SB(sb)) { 4682d7f3542bSJason Yan if (ext3_feature_set_ok(sb)) 4683d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 4684d7f3542bSJason Yan "using the ext4 subsystem"); 4685d7f3542bSJason Yan else { 4686d7f3542bSJason Yan /* 4687d7f3542bSJason Yan * If we're probing be silent, if this looks like 4688d7f3542bSJason Yan * it's actually an ext4 filesystem. 4689d7f3542bSJason Yan */ 4690d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4691d7f3542bSJason Yan return -EINVAL; 4692d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 4693d7f3542bSJason Yan "to feature incompatibilities"); 4694d7f3542bSJason Yan return -EINVAL; 4695d7f3542bSJason Yan } 4696d7f3542bSJason Yan } 4697d7f3542bSJason Yan 4698d7f3542bSJason Yan /* 4699d7f3542bSJason Yan * Check feature flags regardless of the revision level, since we 4700d7f3542bSJason Yan * previously didn't change the revision level when setting the flags, 4701d7f3542bSJason Yan * so there is a chance incompat flags are set on a rev 0 filesystem. 4702d7f3542bSJason Yan */ 4703d7f3542bSJason Yan if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4704d7f3542bSJason Yan return -EINVAL; 4705d7f3542bSJason Yan 4706d7f3542bSJason Yan return 0; 4707d7f3542bSJason Yan } 4708d7f3542bSJason Yan 4709bc62dbf9SJason Yan static int ext4_geometry_check(struct super_block *sb, 4710bc62dbf9SJason Yan struct ext4_super_block *es) 4711bc62dbf9SJason Yan { 4712bc62dbf9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4713bc62dbf9SJason Yan __u64 blocks_count; 4714bc62dbf9SJason Yan 4715bc62dbf9SJason Yan /* check blocks count against device size */ 4716bc62dbf9SJason Yan blocks_count = sb_bdev_nr_blocks(sb); 4717bc62dbf9SJason Yan if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4718bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4719bc62dbf9SJason Yan "exceeds size of device (%llu blocks)", 4720bc62dbf9SJason Yan ext4_blocks_count(es), blocks_count); 4721bc62dbf9SJason Yan return -EINVAL; 4722bc62dbf9SJason Yan } 4723bc62dbf9SJason Yan 4724bc62dbf9SJason Yan /* 4725bc62dbf9SJason Yan * It makes no sense for the first data block to be beyond the end 4726bc62dbf9SJason Yan * of the filesystem. 4727bc62dbf9SJason Yan */ 4728bc62dbf9SJason Yan if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4729bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4730bc62dbf9SJason Yan "block %u is beyond end of filesystem (%llu)", 4731bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4732bc62dbf9SJason Yan ext4_blocks_count(es)); 4733bc62dbf9SJason Yan return -EINVAL; 4734bc62dbf9SJason Yan } 4735bc62dbf9SJason Yan if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4736bc62dbf9SJason Yan (sbi->s_cluster_ratio == 1)) { 4737bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4738bc62dbf9SJason Yan "block is 0 with a 1k block and cluster size"); 4739bc62dbf9SJason Yan return -EINVAL; 4740bc62dbf9SJason Yan } 4741bc62dbf9SJason Yan 4742bc62dbf9SJason Yan blocks_count = (ext4_blocks_count(es) - 4743bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block) + 4744bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb) - 1); 4745bc62dbf9SJason Yan do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 4746bc62dbf9SJason Yan if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4747bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 4748bc62dbf9SJason Yan "(block count %llu, first data block %u, " 4749bc62dbf9SJason Yan "blocks per group %lu)", blocks_count, 4750bc62dbf9SJason Yan ext4_blocks_count(es), 4751bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4752bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb)); 4753bc62dbf9SJason Yan return -EINVAL; 4754bc62dbf9SJason Yan } 4755bc62dbf9SJason Yan sbi->s_groups_count = blocks_count; 4756bc62dbf9SJason Yan sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4757bc62dbf9SJason Yan (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4758bc62dbf9SJason Yan if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4759bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count)) { 4760bc62dbf9SJason Yan ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4761bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count), 4762bc62dbf9SJason Yan ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4763bc62dbf9SJason Yan return -EINVAL; 4764bc62dbf9SJason Yan } 4765bc62dbf9SJason Yan 4766bc62dbf9SJason Yan return 0; 4767bc62dbf9SJason Yan } 4768bc62dbf9SJason Yan 4769a4e6a511SJason Yan static int ext4_group_desc_init(struct super_block *sb, 4770a4e6a511SJason Yan struct ext4_super_block *es, 4771a4e6a511SJason Yan ext4_fsblk_t logical_sb_block, 4772a4e6a511SJason Yan ext4_group_t *first_not_zeroed) 4773a4e6a511SJason Yan { 4774a4e6a511SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4775a4e6a511SJason Yan unsigned int db_count; 4776a4e6a511SJason Yan ext4_fsblk_t block; 4777a4e6a511SJason Yan int i; 4778a4e6a511SJason Yan 4779a4e6a511SJason Yan db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4780a4e6a511SJason Yan EXT4_DESC_PER_BLOCK(sb); 4781a4e6a511SJason Yan if (ext4_has_feature_meta_bg(sb)) { 4782a4e6a511SJason Yan if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 4783a4e6a511SJason Yan ext4_msg(sb, KERN_WARNING, 4784a4e6a511SJason Yan "first meta block group too large: %u " 4785a4e6a511SJason Yan "(group descriptor block count %u)", 4786a4e6a511SJason Yan le32_to_cpu(es->s_first_meta_bg), db_count); 4787a4e6a511SJason Yan return -EINVAL; 4788a4e6a511SJason Yan } 4789a4e6a511SJason Yan } 4790a4e6a511SJason Yan rcu_assign_pointer(sbi->s_group_desc, 4791a4e6a511SJason Yan kvmalloc_array(db_count, 4792a4e6a511SJason Yan sizeof(struct buffer_head *), 4793a4e6a511SJason Yan GFP_KERNEL)); 4794a4e6a511SJason Yan if (sbi->s_group_desc == NULL) { 4795a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "not enough memory"); 4796a4e6a511SJason Yan return -ENOMEM; 4797a4e6a511SJason Yan } 4798a4e6a511SJason Yan 4799a4e6a511SJason Yan bgl_lock_init(sbi->s_blockgroup_lock); 4800a4e6a511SJason Yan 4801a4e6a511SJason Yan /* Pre-read the descriptors into the buffer cache */ 4802a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4803a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4804a4e6a511SJason Yan ext4_sb_breadahead_unmovable(sb, block); 4805a4e6a511SJason Yan } 4806a4e6a511SJason Yan 4807a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4808a4e6a511SJason Yan struct buffer_head *bh; 4809a4e6a511SJason Yan 4810a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4811a4e6a511SJason Yan bh = ext4_sb_bread_unmovable(sb, block); 4812a4e6a511SJason Yan if (IS_ERR(bh)) { 4813a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, 4814a4e6a511SJason Yan "can't read group descriptor %d", i); 4815a4e6a511SJason Yan sbi->s_gdb_count = i; 4816172e344eSYe Bin return PTR_ERR(bh); 4817a4e6a511SJason Yan } 4818a4e6a511SJason Yan rcu_read_lock(); 4819a4e6a511SJason Yan rcu_dereference(sbi->s_group_desc)[i] = bh; 4820a4e6a511SJason Yan rcu_read_unlock(); 4821a4e6a511SJason Yan } 4822a4e6a511SJason Yan sbi->s_gdb_count = db_count; 4823a4e6a511SJason Yan if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { 4824a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 4825172e344eSYe Bin return -EFSCORRUPTED; 4826a4e6a511SJason Yan } 4827172e344eSYe Bin 4828a4e6a511SJason Yan return 0; 4829a4e6a511SJason Yan } 4830a4e6a511SJason Yan 48319c1dd22dSJason Yan static int ext4_load_and_init_journal(struct super_block *sb, 48329c1dd22dSJason Yan struct ext4_super_block *es, 48339c1dd22dSJason Yan struct ext4_fs_context *ctx) 48349c1dd22dSJason Yan { 48359c1dd22dSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 48369c1dd22dSJason Yan int err; 48379c1dd22dSJason Yan 48389c1dd22dSJason Yan err = ext4_load_journal(sb, es, ctx->journal_devnum); 48399c1dd22dSJason Yan if (err) 48409c1dd22dSJason Yan return err; 48419c1dd22dSJason Yan 48429c1dd22dSJason Yan if (ext4_has_feature_64bit(sb) && 48439c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 48449c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_64BIT)) { 48459c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 48469c1dd22dSJason Yan goto out; 48479c1dd22dSJason Yan } 48489c1dd22dSJason Yan 48499c1dd22dSJason Yan if (!set_journal_csum_feature_set(sb)) { 48509c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 48519c1dd22dSJason Yan "feature set"); 48529c1dd22dSJason Yan goto out; 48539c1dd22dSJason Yan } 48549c1dd22dSJason Yan 48559c1dd22dSJason Yan if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 48569c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 48579c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 48589c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, 48599c1dd22dSJason Yan "Failed to set fast commit journal feature"); 48609c1dd22dSJason Yan goto out; 48619c1dd22dSJason Yan } 48629c1dd22dSJason Yan 48639c1dd22dSJason Yan /* We have now updated the journal if required, so we can 48649c1dd22dSJason Yan * validate the data journaling mode. */ 48659c1dd22dSJason Yan switch (test_opt(sb, DATA_FLAGS)) { 48669c1dd22dSJason Yan case 0: 48679c1dd22dSJason Yan /* No mode set, assume a default based on the journal 48689c1dd22dSJason Yan * capabilities: ORDERED_DATA if the journal can 48699c1dd22dSJason Yan * cope, else JOURNAL_DATA 48709c1dd22dSJason Yan */ 48719c1dd22dSJason Yan if (jbd2_journal_check_available_features 48729c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 48739c1dd22dSJason Yan set_opt(sb, ORDERED_DATA); 48749c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 48759c1dd22dSJason Yan } else { 48769c1dd22dSJason Yan set_opt(sb, JOURNAL_DATA); 48779c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 48789c1dd22dSJason Yan } 48799c1dd22dSJason Yan break; 48809c1dd22dSJason Yan 48819c1dd22dSJason Yan case EXT4_MOUNT_ORDERED_DATA: 48829c1dd22dSJason Yan case EXT4_MOUNT_WRITEBACK_DATA: 48839c1dd22dSJason Yan if (!jbd2_journal_check_available_features 48849c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 48859c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Journal does not support " 48869c1dd22dSJason Yan "requested data journaling mode"); 48879c1dd22dSJason Yan goto out; 48889c1dd22dSJason Yan } 48899c1dd22dSJason Yan break; 48909c1dd22dSJason Yan default: 48919c1dd22dSJason Yan break; 48929c1dd22dSJason Yan } 48939c1dd22dSJason Yan 48949c1dd22dSJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 48959c1dd22dSJason Yan test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 48969c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 48979c1dd22dSJason Yan "journal_async_commit in data=ordered mode"); 48989c1dd22dSJason Yan goto out; 48999c1dd22dSJason Yan } 49009c1dd22dSJason Yan 49019c1dd22dSJason Yan set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 49029c1dd22dSJason Yan 49039c1dd22dSJason Yan sbi->s_journal->j_submit_inode_data_buffers = 49049c1dd22dSJason Yan ext4_journal_submit_inode_data_buffers; 49059c1dd22dSJason Yan sbi->s_journal->j_finish_inode_data_buffers = 49069c1dd22dSJason Yan ext4_journal_finish_inode_data_buffers; 49079c1dd22dSJason Yan 49089c1dd22dSJason Yan return 0; 49099c1dd22dSJason Yan 49109c1dd22dSJason Yan out: 49119c1dd22dSJason Yan /* flush s_error_work before journal destroy. */ 49129c1dd22dSJason Yan flush_work(&sbi->s_error_work); 49139c1dd22dSJason Yan jbd2_journal_destroy(sbi->s_journal); 49149c1dd22dSJason Yan sbi->s_journal = NULL; 49159f2a1d9fSJason Yan return -EINVAL; 49169c1dd22dSJason Yan } 49179c1dd22dSJason Yan 4918a5991e53SJason Yan static int ext4_journal_data_mode_check(struct super_block *sb) 4919a5991e53SJason Yan { 4920a5991e53SJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4921a5991e53SJason Yan printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with " 4922a5991e53SJason Yan "data=journal disables delayed allocation, " 4923a5991e53SJason Yan "dioread_nolock, O_DIRECT and fast_commit support!\n"); 4924a5991e53SJason Yan /* can't mount with both data=journal and dioread_nolock. */ 4925a5991e53SJason Yan clear_opt(sb, DIOREAD_NOLOCK); 4926a5991e53SJason Yan clear_opt2(sb, JOURNAL_FAST_COMMIT); 4927a5991e53SJason Yan if (test_opt2(sb, EXPLICIT_DELALLOC)) { 4928a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4929a5991e53SJason Yan "both data=journal and delalloc"); 4930a5991e53SJason Yan return -EINVAL; 4931a5991e53SJason Yan } 4932a5991e53SJason Yan if (test_opt(sb, DAX_ALWAYS)) { 4933a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4934a5991e53SJason Yan "both data=journal and dax"); 4935a5991e53SJason Yan return -EINVAL; 4936a5991e53SJason Yan } 4937a5991e53SJason Yan if (ext4_has_feature_encrypt(sb)) { 4938a5991e53SJason Yan ext4_msg(sb, KERN_WARNING, 4939a5991e53SJason Yan "encrypted files will use data=ordered " 4940a5991e53SJason Yan "instead of data journaling mode"); 4941a5991e53SJason Yan } 4942a5991e53SJason Yan if (test_opt(sb, DELALLOC)) 4943a5991e53SJason Yan clear_opt(sb, DELALLOC); 4944a5991e53SJason Yan } else { 4945a5991e53SJason Yan sb->s_iflags |= SB_I_CGROUPWB; 4946a5991e53SJason Yan } 4947a5991e53SJason Yan 4948a5991e53SJason Yan return 0; 4949a5991e53SJason Yan } 4950a5991e53SJason Yan 4951a7a79c29SJason Yan static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, 4952a7a79c29SJason Yan int silent) 4953a7a79c29SJason Yan { 4954a7a79c29SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4955a7a79c29SJason Yan struct ext4_super_block *es; 4956a7a79c29SJason Yan ext4_fsblk_t logical_sb_block; 4957a7a79c29SJason Yan unsigned long offset = 0; 4958a7a79c29SJason Yan struct buffer_head *bh; 4959a7a79c29SJason Yan int ret = -EINVAL; 4960a7a79c29SJason Yan int blocksize; 4961a7a79c29SJason Yan 4962a7a79c29SJason Yan blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4963a7a79c29SJason Yan if (!blocksize) { 4964a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4965a7a79c29SJason Yan return -EINVAL; 4966a7a79c29SJason Yan } 4967a7a79c29SJason Yan 4968a7a79c29SJason Yan /* 4969a7a79c29SJason Yan * The ext4 superblock will not be buffer aligned for other than 1kB 4970a7a79c29SJason Yan * block sizes. We need to calculate the offset from buffer start. 4971a7a79c29SJason Yan */ 4972a7a79c29SJason Yan if (blocksize != EXT4_MIN_BLOCK_SIZE) { 4973a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 4974a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 4975a7a79c29SJason Yan } else { 4976a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block; 4977a7a79c29SJason Yan } 4978a7a79c29SJason Yan 4979a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 4980a7a79c29SJason Yan if (IS_ERR(bh)) { 4981a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to read superblock"); 4982a7a79c29SJason Yan return PTR_ERR(bh); 4983a7a79c29SJason Yan } 4984a7a79c29SJason Yan /* 4985a7a79c29SJason Yan * Note: s_es must be initialized as soon as possible because 4986a7a79c29SJason Yan * some ext4 macro-instructions depend on its value 4987a7a79c29SJason Yan */ 4988a7a79c29SJason Yan es = (struct ext4_super_block *) (bh->b_data + offset); 4989a7a79c29SJason Yan sbi->s_es = es; 4990a7a79c29SJason Yan sb->s_magic = le16_to_cpu(es->s_magic); 4991a7a79c29SJason Yan if (sb->s_magic != EXT4_SUPER_MAGIC) { 4992a7a79c29SJason Yan if (!silent) 4993a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4994a7a79c29SJason Yan goto out; 4995a7a79c29SJason Yan } 4996a7a79c29SJason Yan 4997a7a79c29SJason Yan if (le32_to_cpu(es->s_log_block_size) > 4998a7a79c29SJason Yan (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4999a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5000a7a79c29SJason Yan "Invalid log block size: %u", 5001a7a79c29SJason Yan le32_to_cpu(es->s_log_block_size)); 5002a7a79c29SJason Yan goto out; 5003a7a79c29SJason Yan } 5004a7a79c29SJason Yan if (le32_to_cpu(es->s_log_cluster_size) > 5005a7a79c29SJason Yan (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5006a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5007a7a79c29SJason Yan "Invalid log cluster size: %u", 5008a7a79c29SJason Yan le32_to_cpu(es->s_log_cluster_size)); 5009a7a79c29SJason Yan goto out; 5010a7a79c29SJason Yan } 5011a7a79c29SJason Yan 5012a7a79c29SJason Yan blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 5013a7a79c29SJason Yan 5014a7a79c29SJason Yan /* 5015a7a79c29SJason Yan * If the default block size is not the same as the real block size, 5016a7a79c29SJason Yan * we need to reload it. 5017a7a79c29SJason Yan */ 5018a7a79c29SJason Yan if (sb->s_blocksize == blocksize) { 5019a7a79c29SJason Yan *lsb = logical_sb_block; 5020a7a79c29SJason Yan sbi->s_sbh = bh; 5021a7a79c29SJason Yan return 0; 5022a7a79c29SJason Yan } 5023a7a79c29SJason Yan 5024a7a79c29SJason Yan /* 5025a7a79c29SJason Yan * bh must be released before kill_bdev(), otherwise 5026a7a79c29SJason Yan * it won't be freed and its page also. kill_bdev() 5027a7a79c29SJason Yan * is called by sb_set_blocksize(). 5028a7a79c29SJason Yan */ 5029a7a79c29SJason Yan brelse(bh); 5030a7a79c29SJason Yan /* Validate the filesystem blocksize */ 5031a7a79c29SJason Yan if (!sb_set_blocksize(sb, blocksize)) { 5032a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "bad block size %d", 5033a7a79c29SJason Yan blocksize); 5034a7a79c29SJason Yan bh = NULL; 5035a7a79c29SJason Yan goto out; 5036a7a79c29SJason Yan } 5037a7a79c29SJason Yan 5038a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5039a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5040a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5041a7a79c29SJason Yan if (IS_ERR(bh)) { 5042a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try"); 5043a7a79c29SJason Yan ret = PTR_ERR(bh); 5044a7a79c29SJason Yan bh = NULL; 5045a7a79c29SJason Yan goto out; 5046a7a79c29SJason Yan } 5047a7a79c29SJason Yan es = (struct ext4_super_block *)(bh->b_data + offset); 5048a7a79c29SJason Yan sbi->s_es = es; 5049a7a79c29SJason Yan if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 5050a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); 5051a7a79c29SJason Yan goto out; 5052a7a79c29SJason Yan } 5053a7a79c29SJason Yan *lsb = logical_sb_block; 5054a7a79c29SJason Yan sbi->s_sbh = bh; 5055a7a79c29SJason Yan return 0; 5056a7a79c29SJason Yan out: 5057a7a79c29SJason Yan brelse(bh); 5058a7a79c29SJason Yan return ret; 5059a7a79c29SJason Yan } 5060a7a79c29SJason Yan 5061db9345d9SJason Yan static void ext4_hash_info_init(struct super_block *sb) 5062db9345d9SJason Yan { 5063db9345d9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5064db9345d9SJason Yan struct ext4_super_block *es = sbi->s_es; 5065db9345d9SJason Yan unsigned int i; 5066db9345d9SJason Yan 5067db9345d9SJason Yan for (i = 0; i < 4; i++) 5068db9345d9SJason Yan sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 5069db9345d9SJason Yan 5070db9345d9SJason Yan sbi->s_def_hash_version = es->s_def_hash_version; 5071db9345d9SJason Yan if (ext4_has_feature_dir_index(sb)) { 5072db9345d9SJason Yan i = le32_to_cpu(es->s_flags); 5073db9345d9SJason Yan if (i & EXT2_FLAGS_UNSIGNED_HASH) 5074db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5075db9345d9SJason Yan else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 5076db9345d9SJason Yan #ifdef __CHAR_UNSIGNED__ 5077db9345d9SJason Yan if (!sb_rdonly(sb)) 5078db9345d9SJason Yan es->s_flags |= 5079db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 5080db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5081db9345d9SJason Yan #else 5082db9345d9SJason Yan if (!sb_rdonly(sb)) 5083db9345d9SJason Yan es->s_flags |= 5084db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 5085db9345d9SJason Yan #endif 5086db9345d9SJason Yan } 5087db9345d9SJason Yan } 5088db9345d9SJason Yan } 5089db9345d9SJason Yan 5090960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 50917edfd85bSLukas Czerner { 5092617ba13bSMingming Cao struct ext4_super_block *es = NULL; 50937edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 50947c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 509570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 5096ac27a0ecSDave Kleikamp struct inode *root; 5097dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 50984ec11028STheodore Ts'o unsigned int i; 5099ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 510007aa2ea1SLukas Czerner int err = 0; 5101bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 51027edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 5103960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 5104b237e304SHarshad Shirwadkar 5105b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 5106e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 51077edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5108ac27a0ecSDave Kleikamp 5109240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 5110f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 51118446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 5112ac27a0ecSDave Kleikamp 511307aa2ea1SLukas Czerner /* -EINVAL is default */ 5114dcc7dae3SCyrill Gorcunov ret = -EINVAL; 5115a7a79c29SJason Yan err = ext4_load_super(sb, &logical_sb_block, silent); 5116a7a79c29SJason Yan if (err) 5117ac27a0ecSDave Kleikamp goto out_fail; 5118ac27a0ecSDave Kleikamp 5119a7a79c29SJason Yan es = sbi->s_es; 5120afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 5121ac27a0ecSDave Kleikamp 5122b26458d1SJason Yan err = ext4_init_metadata_csum(sb, es); 5123b26458d1SJason Yan if (err) 5124a5fc5119SJason Yan goto failed_mount; 5125a9c47317SDarrick J. Wong 51265f6d662dSJason Yan ext4_set_def_opts(sb, es); 5127ac27a0ecSDave Kleikamp 512808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 512908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 513030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 513130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 513230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 5133ac27a0ecSDave Kleikamp 513451ce6511SLukas Czerner /* 513551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 513651ce6511SLukas Czerner * no mount option specified. 513751ce6511SLukas Czerner */ 513851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 513951ce6511SLukas Czerner 5140c8267c51SJason Yan if (ext4_inode_info_init(sb, es)) 51419803387cSTheodore Ts'o goto failed_mount; 51429803387cSTheodore Ts'o 51437edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 51447edfd85bSLukas Czerner if (err < 0) 51455aee0f8aSTheodore Ts'o goto failed_mount; 51467edfd85bSLukas Czerner 51475a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 5148e3645d72SZhang Yi sbi->s_def_mount_opt2 = sbi->s_mount_opt2; 51497edfd85bSLukas Czerner 51507edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 51517edfd85bSLukas Czerner if (err < 0) 51527edfd85bSLukas Czerner goto failed_mount; 51537edfd85bSLukas Czerner 515485456054SEric Biggers ext4_apply_options(fc, sb); 5155ac27a0ecSDave Kleikamp 515639c135b0SJason Yan if (ext4_encoding_init(sb, es)) 5157c83ad55eSGabriel Krisman Bertazi goto failed_mount; 5158c83ad55eSGabriel Krisman Bertazi 5159a5991e53SJason Yan if (ext4_journal_data_mode_check(sb)) 516056889787STheodore Ts'o goto failed_mount; 516156889787STheodore Ts'o 51621751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 51631751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5164ac27a0ecSDave Kleikamp 51651ff20307SJeff Layton /* i_version is always enabled now */ 51661ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 51671ff20307SJeff Layton 5168d7f3542bSJason Yan if (ext4_check_feature_compatibility(sb, es, silent)) 5169ac27a0ecSDave Kleikamp goto failed_mount; 5170a13fb1a4SEric Sandeen 5171c8267c51SJason Yan if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) { 51725b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 51735b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 51745b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 51755b9554dcSTheodore Ts'o goto failed_mount; 51765b9554dcSTheodore Ts'o } 51775b9554dcSTheodore Ts'o 517889b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 5179c8267c51SJason Yan if (sb->s_blocksize == PAGE_SIZE) 5180a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 51817b0800d0SChristoph Hellwig else 51827b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 51837b0800d0SChristoph Hellwig } 5184a8ab6d38SIra Weiny 5185fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 5186559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 5187559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 5188559db4c6SRoss Zwisler " that may contain inline data"); 5189361d24d4SEric Sandeen goto failed_mount; 5190559db4c6SRoss Zwisler } 5191a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 519224f3478dSDan Williams ext4_msg(sb, KERN_ERR, 5193361d24d4SEric Sandeen "DAX unsupported by block device."); 5194361d24d4SEric Sandeen goto failed_mount; 519524f3478dSDan Williams } 5196923ae0ffSRoss Zwisler } 5197923ae0ffSRoss Zwisler 5198e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 51996ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 52006ddb2447STheodore Ts'o es->s_encryption_level); 52016ddb2447STheodore Ts'o goto failed_mount; 52026ddb2447STheodore Ts'o } 52036ddb2447STheodore Ts'o 5204e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 5205f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 5206f287a1a5STheodore Ts'o has_huge_files); 5207f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 5208ac27a0ecSDave Kleikamp 52090d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 5210e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 52118fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 52120d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 5213d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 5214b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5215b31e1552SEric Sandeen "unsupported descriptor size %lu", 52160d1ee42fSAlexandre Ratchov sbi->s_desc_size); 52170d1ee42fSAlexandre Ratchov goto failed_mount; 52180d1ee42fSAlexandre Ratchov } 52190d1ee42fSAlexandre Ratchov } else 52200d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 52210b8e58a1SAndreas Dilger 5222ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 5223ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 52240b8e58a1SAndreas Dilger 5225c8267c51SJason Yan sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb); 5226a5fc5119SJason Yan if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { 5227a5fc5119SJason Yan if (!silent) 5228a5fc5119SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5229a5fc5119SJason Yan goto failed_mount; 5230a5fc5119SJason Yan } 5231cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 5232c8267c51SJason Yan sbi->s_inodes_per_group > sb->s_blocksize * 8) { 5233cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 5234b9c538daSJosh Triplett sbi->s_inodes_per_group); 5235cd6bb35bSTheodore Ts'o goto failed_mount; 5236cd6bb35bSTheodore Ts'o } 5237ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 5238ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 5239c8267c51SJason Yan sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb); 5240c878bea3STheodore Ts'o sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 5241e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 5242e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 52430b8e58a1SAndreas Dilger 5244db9345d9SJason Yan ext4_hash_info_init(sb); 5245ac27a0ecSDave Kleikamp 5246c8267c51SJason Yan if (ext4_handle_clustersize(sb)) 5247281b5995STheodore Ts'o goto failed_mount; 5248960fd856STheodore Ts'o 5249bf43d84bSEric Sandeen /* 5250bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 5251bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 5252bf43d84bSEric Sandeen */ 52535a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 525430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 52555a9ae68aSDarrick J. Wong if (err) { 5256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 5257bf43d84bSEric Sandeen " too large to mount safely on this system"); 5258ac27a0ecSDave Kleikamp goto failed_mount; 5259ac27a0ecSDave Kleikamp } 5260ac27a0ecSDave Kleikamp 5261bc62dbf9SJason Yan if (ext4_geometry_check(sb, es)) 52620f2ddca6SFrom: Thiemo Nagel goto failed_mount; 52630f2ddca6SFrom: Thiemo Nagel 5264235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5265c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5266c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 526704496411STao Ma 5268172e344eSYe Bin err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); 5269172e344eSYe Bin if (err) 5270172e344eSYe Bin goto failed_mount3; 5271172e344eSYe Bin 5272a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5273eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5274ce7e010aSTheodore Ts'o goto failed_mount3; 5275ce7e010aSTheodore Ts'o 5276c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 527767a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5278c9de560dSAlex Tomas 5279f9ae9cf5STheodore Ts'o /* 5280f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5281f9ae9cf5STheodore Ts'o */ 5282f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5283617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5284617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5285643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5286a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5287ffcc4182SEric Biggers #endif 5288c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5289c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5290c93d8f88SEric Biggers #endif 5291ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5292617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5293e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 52941fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5295262b4662SJan Kara else 5296262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5297689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5298ac27a0ecSDave Kleikamp #endif 529985787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5300f2fa2ffcSAneesh Kumar K.V 5301ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 53023b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5303ac27a0ecSDave Kleikamp 5304f7314a67SJason Yan ext4_fast_commit_init(sb); 5305aa75f4d3SHarshad Shirwadkar 5306ac27a0ecSDave Kleikamp sb->s_root = NULL; 5307ac27a0ecSDave Kleikamp 5308ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 530902f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5310e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5311ac27a0ecSDave Kleikamp 5312bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5313c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 531450460fe8SDarrick J. Wong goto failed_mount3a; 5315c5e06d10SJohann Lombardi 5316ac27a0ecSDave Kleikamp /* 5317ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5318ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5319ac27a0ecSDave Kleikamp */ 5320e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 53219c1dd22dSJason Yan err = ext4_load_and_init_journal(sb, es, ctx); 53224753d8a2STheodore Ts'o if (err) 532350460fe8SDarrick J. Wong goto failed_mount3a; 5324bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5325e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5326b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5327b31e1552SEric Sandeen "suppressed and not mounted read-only"); 532843bd6f1bSJason Yan goto failed_mount3a; 5329ac27a0ecSDave Kleikamp } else { 53301e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 53311e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 53321e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53331e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 533443bd6f1bSJason Yan goto failed_mount3a; 53351e381f60SDmitry Monakhov } 533689481b5fSBaokun Li 533789481b5fSBaokun Li if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 533889481b5fSBaokun Li ext4_msg(sb, KERN_ERR, "can't mount with " 533989481b5fSBaokun Li "journal_checksum, fs mounted w/o journal"); 534089481b5fSBaokun Li goto failed_mount3a; 534189481b5fSBaokun Li } 53421e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 53431e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53441e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 53451e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 534643bd6f1bSJason Yan goto failed_mount3a; 53471e381f60SDmitry Monakhov } 53481e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 53491e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 53501e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53511e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 535243bd6f1bSJason Yan goto failed_mount3a; 53531e381f60SDmitry Monakhov } 535450b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 53551e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5356fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5357995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 53580390131bSFrank Mayhar sbi->s_journal = NULL; 53590390131bSFrank Mayhar needs_recovery = 0; 5360ac27a0ecSDave Kleikamp } 5361ac27a0ecSDave Kleikamp 5362cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 536347387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 536447387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5365cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5366cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 53679c191f70ST Makphaibulchoke goto failed_mount_wq; 53689c191f70ST Makphaibulchoke } 53699c191f70ST Makphaibulchoke 5370dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5371dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5372dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5373dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5374dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5375dec214d0STahsin Erdogan goto failed_mount_wq; 5376dec214d0STahsin Erdogan } 5377dec214d0STahsin Erdogan } 5378cdb7ee4cSTahsin Erdogan } 5379dec214d0STahsin Erdogan 5380fd89d5f2STejun Heo /* 5381952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5382952fc18eSTheodore Ts'o * superblock if present. 5383952fc18eSTheodore Ts'o */ 5384952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 538585d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 538685d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 538785d825dbSTheodore Ts'o sbi->s_overhead = 0; 538885d825dbSTheodore Ts'o /* 538985d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 539085d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 539185d825dbSTheodore Ts'o * it to make sure we are using the correct value. 539285d825dbSTheodore Ts'o */ 539385d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 539485d825dbSTheodore Ts'o sbi->s_overhead = 0; 539585d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 539607aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 539707aa2ea1SLukas Czerner if (err) 5398952fc18eSTheodore Ts'o goto failed_mount_wq; 5399952fc18eSTheodore Ts'o } 5400952fc18eSTheodore Ts'o 5401952fc18eSTheodore Ts'o /* 5402fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5403fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5404fd89d5f2STejun Heo */ 54052e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 54062e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 54072e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 54082e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 540907aa2ea1SLukas Czerner ret = -ENOMEM; 54102e8fa54eSJan Kara goto failed_mount4; 54112e8fa54eSJan Kara } 54122e8fa54eSJan Kara 5413ac27a0ecSDave Kleikamp /* 5414dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5415ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5416ac27a0ecSDave Kleikamp */ 5417ac27a0ecSDave Kleikamp 54188a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 54191d1fe1eeSDavid Howells if (IS_ERR(root)) { 5420b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 54211d1fe1eeSDavid Howells ret = PTR_ERR(root); 542232a9bb57SManish Katiyar root = NULL; 5423ac27a0ecSDave Kleikamp goto failed_mount4; 5424ac27a0ecSDave Kleikamp } 5425ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5426b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 542794bf608aSAl Viro iput(root); 5428ac27a0ecSDave Kleikamp goto failed_mount4; 5429ac27a0ecSDave Kleikamp } 5430b886ee3eSGabriel Krisman Bertazi 543148fde701SAl Viro sb->s_root = d_make_root(root); 54321d1fe1eeSDavid Howells if (!sb->s_root) { 5433b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 54341d1fe1eeSDavid Howells ret = -ENOMEM; 54351d1fe1eeSDavid Howells goto failed_mount4; 54361d1fe1eeSDavid Howells } 5437ac27a0ecSDave Kleikamp 5438c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5439c89128a0SJaegeuk Kim if (ret == -EROFS) { 54401751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5441c89128a0SJaegeuk Kim ret = 0; 5442c89128a0SJaegeuk Kim } else if (ret) 5443c89128a0SJaegeuk Kim goto failed_mount4a; 5444ef7f3835SKalpak Shah 5445b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 544627dd4385SLukas Czerner 54470f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 54486fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 54496fd058f7STheodore Ts'o if (err) { 5450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5451fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5452f9ae9cf5STheodore Ts'o goto failed_mount4a; 5453f9ae9cf5STheodore Ts'o } 54540f5bde1dSJan Kara } 54558016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5456f9ae9cf5STheodore Ts'o 5457f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5458196e402aSHarshad Shirwadkar 5459196e402aSHarshad Shirwadkar /* 5460196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5461196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5462196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5463196e402aSHarshad Shirwadkar */ 546427b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 546527b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5466196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 546727b38686SOjaswin Mujoo else 5468196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 546927b38686SOjaswin Mujoo } 5470196e402aSHarshad Shirwadkar 5471f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5472f9ae9cf5STheodore Ts'o if (err) { 5473f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5474f9ae9cf5STheodore Ts'o err); 5475dcf2d804STao Ma goto failed_mount5; 5476c2774d84SAneesh Kumar K.V } 5477c2774d84SAneesh Kumar K.V 5478027f14f5STheodore Ts'o /* 5479027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5480027f14f5STheodore Ts'o * mballoc is initialized 5481027f14f5STheodore Ts'o */ 5482027f14f5STheodore Ts'o if (sbi->s_journal) 5483027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5484027f14f5STheodore Ts'o ext4_journal_commit_callback; 5485027f14f5STheodore Ts'o 54861f79467cSJason Yan if (ext4_percpu_param_init(sbi)) 5487d5e03cbbSTheodore Ts'o goto failed_mount6; 5488d5e03cbbSTheodore Ts'o 5489e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5490d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5491d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5492d5e03cbbSTheodore Ts'o "unable to initialize " 5493d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54948f6840c4SYang Yingliang ret = -ENOMEM; 5495d5e03cbbSTheodore Ts'o goto failed_mount6; 5496d5e03cbbSTheodore Ts'o } 5497d5e03cbbSTheodore Ts'o 5498bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5499bfff6873SLukas Czerner if (err) 5500dcf2d804STao Ma goto failed_mount6; 5501bfff6873SLukas Czerner 5502b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5503dcf2d804STao Ma if (err) 5504dcf2d804STao Ma goto failed_mount7; 55053197ebdbSTheodore Ts'o 550602f310fcSJan Kara err = ext4_init_orphan_info(sb); 550702f310fcSJan Kara if (err) 550802f310fcSJan Kara goto failed_mount8; 55099b2ff357SJan Kara #ifdef CONFIG_QUOTA 55109b2ff357SJan Kara /* Enable quota usage during mount. */ 5511bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 55129b2ff357SJan Kara err = ext4_enable_quotas(sb); 55139b2ff357SJan Kara if (err) 551402f310fcSJan Kara goto failed_mount9; 55159b2ff357SJan Kara } 55169b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 55179b2ff357SJan Kara 5518bc71726cSzhangyi (F) /* 5519bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5520bc71726cSzhangyi (F) * used to detect the metadata async write error. 5521bc71726cSzhangyi (F) */ 5522bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5523bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5524bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5525bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5526617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5527617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5528617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 55299b6641ddSYe Bin /* 55309b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 55319b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 55329b6641ddSYe Bin * checksum in the buffer cache until it is written out and 55339b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 55349b6641ddSYe Bin * after it is mounted can fail. 55359b6641ddSYe Bin */ 55369b6641ddSYe Bin ext4_superblock_csum_set(sb); 55370390131bSFrank Mayhar if (needs_recovery) { 5538b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 553911215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 554011215630SJan Kara if (err) 554102f310fcSJan Kara goto failed_mount9; 55420390131bSFrank Mayhar } 55430390131bSFrank Mayhar 554470200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 554579add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 554670200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 554779add3a3SLukas Czerner 554866e61a9eSTheodore Ts'o if (es->s_error_count) 554966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5550ac27a0ecSDave Kleikamp 5551efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5552efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5553efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5554efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 55551cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 55561cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5557efbed4dcSTheodore Ts'o 5558ac27a0ecSDave Kleikamp return 0; 5559ac27a0ecSDave Kleikamp 556002f310fcSJan Kara failed_mount9: 556102f310fcSJan Kara ext4_release_orphan_info(sb); 556272ba7450STheodore Ts'o failed_mount8: 5563ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5564cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5565dcf2d804STao Ma failed_mount7: 5566dcf2d804STao Ma ext4_unregister_li_request(sb); 5567dcf2d804STao Ma failed_mount6: 5568f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55697c990728SSuraj Jitindar Singh rcu_read_lock(); 55707c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55717c990728SSuraj Jitindar Singh if (flex_groups) { 55727c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55737c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55747c990728SSuraj Jitindar Singh kvfree(flex_groups); 55757c990728SSuraj Jitindar Singh } 55767c990728SSuraj Jitindar Singh rcu_read_unlock(); 55771f79467cSJason Yan ext4_percpu_param_destroy(sbi); 557800764937SAzat Khuzhin failed_mount5: 5579f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5580f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5581f9ae9cf5STheodore Ts'o failed_mount4a: 558294bf608aSAl Viro dput(sb->s_root); 558332a9bb57SManish Katiyar sb->s_root = NULL; 558494bf608aSAl Viro failed_mount4: 5585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55862e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55872e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55884c0425ffSMingming Cao failed_mount_wq: 5589dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5590dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 559150c15df6SChengguang Xu 559247387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 559347387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 559450c15df6SChengguang Xu 55950390131bSFrank Mayhar if (sbi->s_journal) { 5596bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5597bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5598dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 559947b4a50bSJan Kara sbi->s_journal = NULL; 56000390131bSFrank Mayhar } 560150460fe8SDarrick J. Wong failed_mount3a: 5602d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5603eb68d0e2SZheng Liu failed_mount3: 5604bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5605c92dc856SJan Kara flush_work(&sbi->s_error_work); 56062a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5607618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5608a4e6a511SJason Yan ext4_group_desc_free(sbi); 5609ac27a0ecSDave Kleikamp failed_mount: 56100441984aSDarrick J. Wong if (sbi->s_chksum_driver) 56110441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5612c83ad55eSGabriel Krisman Bertazi 56135298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5614f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5615c83ad55eSGabriel Krisman Bertazi #endif 5616c83ad55eSGabriel Krisman Bertazi 5617ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5618a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 56190ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5620ac27a0ecSDave Kleikamp #endif 5621ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5622afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5623a7a79c29SJason Yan brelse(sbi->s_sbh); 5624afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5625ac27a0ecSDave Kleikamp out_fail: 5626ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 562707aa2ea1SLukas Czerner return err ? err : ret; 5628ac27a0ecSDave Kleikamp } 5629ac27a0ecSDave Kleikamp 5630cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 56317edfd85bSLukas Czerner { 5632cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 56337edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56347edfd85bSLukas Czerner const char *descr; 5635cebe85d5SLukas Czerner int ret; 56367edfd85bSLukas Czerner 5637cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5638cebe85d5SLukas Czerner if (!sbi) 56397c268d4cSLukas Czerner return -ENOMEM; 5640cebe85d5SLukas Czerner 5641cebe85d5SLukas Czerner fc->s_fs_info = sbi; 56427edfd85bSLukas Czerner 56437edfd85bSLukas Czerner /* Cleanup superblock name */ 56447edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56457edfd85bSLukas Czerner 56467edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5647cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5648cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 56497edfd85bSLukas Czerner 5650960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 56517edfd85bSLukas Czerner if (ret < 0) 56527edfd85bSLukas Czerner goto free_sbi; 56537edfd85bSLukas Czerner 5654cebe85d5SLukas Czerner if (sbi->s_journal) { 56557edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56567edfd85bSLukas Czerner descr = " journalled data mode"; 56577edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56587edfd85bSLukas Czerner descr = " ordered data mode"; 56597edfd85bSLukas Czerner else 56607edfd85bSLukas Czerner descr = " writeback data mode"; 56617edfd85bSLukas Czerner } else 56627edfd85bSLukas Czerner descr = "out journal"; 56637edfd85bSLukas Czerner 56647edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 5665bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem %pU with%s. " 5666bb0fbc78SLukas Czerner "Quota mode: %s.", &sb->s_uuid, descr, 5667bb0fbc78SLukas Czerner ext4_quota_mode(sb)); 56687edfd85bSLukas Czerner 5669eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5670827891a3STheodore Ts'o ext4_update_overhead(sb, false); 56717edfd85bSLukas Czerner return 0; 5672cebe85d5SLukas Czerner 56737edfd85bSLukas Czerner free_sbi: 56747edfd85bSLukas Czerner ext4_free_sbi(sbi); 5675cebe85d5SLukas Czerner fc->s_fs_info = NULL; 56767edfd85bSLukas Czerner return ret; 56777edfd85bSLukas Czerner } 56787edfd85bSLukas Czerner 5679cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5680cebe85d5SLukas Czerner { 5681cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5682cebe85d5SLukas Czerner } 5683cebe85d5SLukas Czerner 5684ac27a0ecSDave Kleikamp /* 5685ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5686ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5687ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5688ac27a0ecSDave Kleikamp */ 5689617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5690ac27a0ecSDave Kleikamp { 5691617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5692ac27a0ecSDave Kleikamp 5693ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 569430773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 569530773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 56966866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5697ac27a0ecSDave Kleikamp 5698a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5699ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5700dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5701ac27a0ecSDave Kleikamp else 5702dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57035bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57045bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57055bf5683aSHidehiro Kawai else 57065bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5707a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5708ac27a0ecSDave Kleikamp } 5709ac27a0ecSDave Kleikamp 5710c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5711ac27a0ecSDave Kleikamp unsigned int journal_inum) 5712ac27a0ecSDave Kleikamp { 5713ac27a0ecSDave Kleikamp struct inode *journal_inode; 5714ac27a0ecSDave Kleikamp 5715c6cb7e77SEric Whitney /* 5716c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5717c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5718c6cb7e77SEric Whitney * will try to delete it. 5719c6cb7e77SEric Whitney */ 57208a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57211d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5722b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5723ac27a0ecSDave Kleikamp return NULL; 5724ac27a0ecSDave Kleikamp } 5725ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5726ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5727ac27a0ecSDave Kleikamp iput(journal_inode); 5728b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5729ac27a0ecSDave Kleikamp return NULL; 5730ac27a0ecSDave Kleikamp } 5731ac27a0ecSDave Kleikamp 57324978c659SJan Kara ext4_debug("Journal inode found at %p: %lld bytes\n", 5733ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 5734105c78e1SEric Biggers if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) { 5735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5736ac27a0ecSDave Kleikamp iput(journal_inode); 5737ac27a0ecSDave Kleikamp return NULL; 5738ac27a0ecSDave Kleikamp } 5739c6cb7e77SEric Whitney return journal_inode; 5740c6cb7e77SEric Whitney } 5741c6cb7e77SEric Whitney 574262913ae9STheodore Ts'o static int ext4_journal_bmap(journal_t *journal, sector_t *block) 574362913ae9STheodore Ts'o { 574462913ae9STheodore Ts'o struct ext4_map_blocks map; 574562913ae9STheodore Ts'o int ret; 574662913ae9STheodore Ts'o 574762913ae9STheodore Ts'o if (journal->j_inode == NULL) 574862913ae9STheodore Ts'o return 0; 574962913ae9STheodore Ts'o 575062913ae9STheodore Ts'o map.m_lblk = *block; 575162913ae9STheodore Ts'o map.m_len = 1; 575262913ae9STheodore Ts'o ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0); 575362913ae9STheodore Ts'o if (ret <= 0) { 575462913ae9STheodore Ts'o ext4_msg(journal->j_inode->i_sb, KERN_CRIT, 575562913ae9STheodore Ts'o "journal bmap failed: block %llu ret %d\n", 575662913ae9STheodore Ts'o *block, ret); 575762913ae9STheodore Ts'o jbd2_journal_abort(journal, ret ? ret : -EIO); 575862913ae9STheodore Ts'o return ret; 575962913ae9STheodore Ts'o } 576062913ae9STheodore Ts'o *block = map.m_pblk; 576162913ae9STheodore Ts'o return 0; 576262913ae9STheodore Ts'o } 576362913ae9STheodore Ts'o 5764c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5765c6cb7e77SEric Whitney unsigned int journal_inum) 5766c6cb7e77SEric Whitney { 5767c6cb7e77SEric Whitney struct inode *journal_inode; 5768c6cb7e77SEric Whitney journal_t *journal; 5769c6cb7e77SEric Whitney 577011215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 577111215630SJan Kara return NULL; 5772c6cb7e77SEric Whitney 5773c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5774c6cb7e77SEric Whitney if (!journal_inode) 5775c6cb7e77SEric Whitney return NULL; 5776ac27a0ecSDave Kleikamp 5777dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5778ac27a0ecSDave Kleikamp if (!journal) { 5779b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5780ac27a0ecSDave Kleikamp iput(journal_inode); 5781ac27a0ecSDave Kleikamp return NULL; 5782ac27a0ecSDave Kleikamp } 5783ac27a0ecSDave Kleikamp journal->j_private = sb; 578462913ae9STheodore Ts'o journal->j_bmap = ext4_journal_bmap; 5785617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5786ac27a0ecSDave Kleikamp return journal; 5787ac27a0ecSDave Kleikamp } 5788ac27a0ecSDave Kleikamp 5789617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5790ac27a0ecSDave Kleikamp dev_t j_dev) 5791ac27a0ecSDave Kleikamp { 5792ac27a0ecSDave Kleikamp struct buffer_head *bh; 5793ac27a0ecSDave Kleikamp journal_t *journal; 5794617ba13bSMingming Cao ext4_fsblk_t start; 5795617ba13bSMingming Cao ext4_fsblk_t len; 5796ac27a0ecSDave Kleikamp int hblock, blocksize; 5797617ba13bSMingming Cao ext4_fsblk_t sb_block; 5798ac27a0ecSDave Kleikamp unsigned long offset; 5799617ba13bSMingming Cao struct ext4_super_block *es; 5800ac27a0ecSDave Kleikamp struct block_device *bdev; 5801ac27a0ecSDave Kleikamp 580211215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 580311215630SJan Kara return NULL; 58040390131bSFrank Mayhar 5805b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5806ac27a0ecSDave Kleikamp if (bdev == NULL) 5807ac27a0ecSDave Kleikamp return NULL; 5808ac27a0ecSDave Kleikamp 5809ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5810e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5811ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5812b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5813b31e1552SEric Sandeen "blocksize too small for journal device"); 5814ac27a0ecSDave Kleikamp goto out_bdev; 5815ac27a0ecSDave Kleikamp } 5816ac27a0ecSDave Kleikamp 5817617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5818617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5819ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5820ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5821b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5822b31e1552SEric Sandeen "external journal"); 5823ac27a0ecSDave Kleikamp goto out_bdev; 5824ac27a0ecSDave Kleikamp } 5825ac27a0ecSDave Kleikamp 58262716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5827617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5828ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5829617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5830b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5831b31e1552SEric Sandeen "bad superblock"); 5832ac27a0ecSDave Kleikamp brelse(bh); 5833ac27a0ecSDave Kleikamp goto out_bdev; 5834ac27a0ecSDave Kleikamp } 5835ac27a0ecSDave Kleikamp 5836df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5837df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5838df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5839df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5840df4763beSDarrick J. Wong "corrupt superblock"); 5841df4763beSDarrick J. Wong brelse(bh); 5842df4763beSDarrick J. Wong goto out_bdev; 5843df4763beSDarrick J. Wong } 5844df4763beSDarrick J. Wong 5845617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5846b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5847ac27a0ecSDave Kleikamp brelse(bh); 5848ac27a0ecSDave Kleikamp goto out_bdev; 5849ac27a0ecSDave Kleikamp } 5850ac27a0ecSDave Kleikamp 5851bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5852ac27a0ecSDave Kleikamp start = sb_block + 1; 5853ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5854ac27a0ecSDave Kleikamp 5855dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5856ac27a0ecSDave Kleikamp start, len, blocksize); 5857ac27a0ecSDave Kleikamp if (!journal) { 5858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5859ac27a0ecSDave Kleikamp goto out_bdev; 5860ac27a0ecSDave Kleikamp } 5861ac27a0ecSDave Kleikamp journal->j_private = sb; 58622d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5863b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5864ac27a0ecSDave Kleikamp goto out_journal; 5865ac27a0ecSDave Kleikamp } 5866ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5868b31e1552SEric Sandeen "user (unsupported) - %d", 5869ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5870ac27a0ecSDave Kleikamp goto out_journal; 5871ac27a0ecSDave Kleikamp } 5872ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5873617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5874ac27a0ecSDave Kleikamp return journal; 58750b8e58a1SAndreas Dilger 5876ac27a0ecSDave Kleikamp out_journal: 5877dab291afSMingming Cao jbd2_journal_destroy(journal); 5878ac27a0ecSDave Kleikamp out_bdev: 5879617ba13bSMingming Cao ext4_blkdev_put(bdev); 5880ac27a0ecSDave Kleikamp return NULL; 5881ac27a0ecSDave Kleikamp } 5882ac27a0ecSDave Kleikamp 5883617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5884617ba13bSMingming Cao struct ext4_super_block *es, 5885ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5886ac27a0ecSDave Kleikamp { 5887ac27a0ecSDave Kleikamp journal_t *journal; 5888ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5889ac27a0ecSDave Kleikamp dev_t journal_dev; 5890ac27a0ecSDave Kleikamp int err = 0; 5891ac27a0ecSDave Kleikamp int really_read_only; 5892273108faSLukas Czerner int journal_dev_ro; 5893ac27a0ecSDave Kleikamp 589411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 589511215630SJan Kara return -EFSCORRUPTED; 58960390131bSFrank Mayhar 5897ac27a0ecSDave Kleikamp if (journal_devnum && 5898ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5899b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5900b31e1552SEric Sandeen "numbers have changed"); 5901ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5902ac27a0ecSDave Kleikamp } else 5903ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5904ac27a0ecSDave Kleikamp 5905273108faSLukas Czerner if (journal_inum && journal_dev) { 5906273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5907273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5908273108faSLukas Czerner return -EINVAL; 5909273108faSLukas Czerner } 5910273108faSLukas Czerner 5911273108faSLukas Czerner if (journal_inum) { 5912273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5913273108faSLukas Czerner if (!journal) 5914273108faSLukas Czerner return -EINVAL; 5915273108faSLukas Czerner } else { 5916273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5917273108faSLukas Czerner if (!journal) 5918273108faSLukas Czerner return -EINVAL; 5919273108faSLukas Czerner } 5920273108faSLukas Czerner 5921273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5922273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5923273108faSLukas Czerner 5924273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5925273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5926273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5927273108faSLukas Czerner err = -EROFS; 5928273108faSLukas Czerner goto err_out; 5929273108faSLukas Czerner } 5930ac27a0ecSDave Kleikamp 5931ac27a0ecSDave Kleikamp /* 5932ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5933ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5934ac27a0ecSDave Kleikamp * can get read-write access to the device. 5935ac27a0ecSDave Kleikamp */ 5936e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5937bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5938b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5939b31e1552SEric Sandeen "required on readonly filesystem"); 5940ac27a0ecSDave Kleikamp if (really_read_only) { 5941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5942d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5943d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5944273108faSLukas Czerner err = -EROFS; 5945273108faSLukas Czerner goto err_out; 5946ac27a0ecSDave Kleikamp } 5947b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5948b31e1552SEric Sandeen "be enabled during recovery"); 5949ac27a0ecSDave Kleikamp } 5950ac27a0ecSDave Kleikamp } 5951ac27a0ecSDave Kleikamp 595290576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5953b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 59544776004fSTheodore Ts'o 5955e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5956dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 59571c13d5c0STheodore Ts'o if (!err) { 59581c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 5959eee00237SYe Bin 59601c13d5c0STheodore Ts'o if (save) 59611c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 59621c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5963dab291afSMingming Cao err = jbd2_journal_load(journal); 59641c13d5c0STheodore Ts'o if (save) 59651c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 59661c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 59671c13d5c0STheodore Ts'o kfree(save); 5968eee00237SYe Bin es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state & 5969eee00237SYe Bin EXT4_ERROR_FS); 5970eee00237SYe Bin /* Write out restored error information to the superblock */ 5971eee00237SYe Bin if (!bdev_read_only(sb->s_bdev)) { 5972eee00237SYe Bin int err2; 5973eee00237SYe Bin err2 = ext4_commit_super(sb); 5974eee00237SYe Bin err = err ? : err2; 5975eee00237SYe Bin } 59761c13d5c0STheodore Ts'o } 5977ac27a0ecSDave Kleikamp 5978ac27a0ecSDave Kleikamp if (err) { 5979b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5980273108faSLukas Czerner goto err_out; 5981ac27a0ecSDave Kleikamp } 5982ac27a0ecSDave Kleikamp 5983617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 598411215630SJan Kara err = ext4_clear_journal_err(sb, es); 598511215630SJan Kara if (err) { 598611215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 598711215630SJan Kara jbd2_journal_destroy(journal); 598811215630SJan Kara return err; 598911215630SJan Kara } 5990ac27a0ecSDave Kleikamp 5991c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5992ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5993ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 59943039d8b8SBaokun Li ext4_commit_super(sb); 59953039d8b8SBaokun Li } 59963039d8b8SBaokun Li if (!really_read_only && journal_inum && 59973039d8b8SBaokun Li journal_inum != le32_to_cpu(es->s_journal_inum)) { 59983039d8b8SBaokun Li es->s_journal_inum = cpu_to_le32(journal_inum); 59994392fbc4SJan Kara ext4_commit_super(sb); 6000ac27a0ecSDave Kleikamp } 6001ac27a0ecSDave Kleikamp 6002ac27a0ecSDave Kleikamp return 0; 6003273108faSLukas Czerner 6004273108faSLukas Czerner err_out: 6005273108faSLukas Czerner jbd2_journal_destroy(journal); 6006273108faSLukas Czerner return err; 6007ac27a0ecSDave Kleikamp } 6008ac27a0ecSDave Kleikamp 60092d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 60102d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 6011ac27a0ecSDave Kleikamp { 6012c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 6013e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 6014e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 6015ac27a0ecSDave Kleikamp 601605c2c00fSJan Kara lock_buffer(sbh); 6017a17712c8SJon Derrick /* 601871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 601971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 602071290b36STheodore Ts'o * write time when we are mounting the root file system 602171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 602271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 602371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 602471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 602571290b36STheodore Ts'o * to complain and force a full file system check. 602671290b36STheodore Ts'o */ 60271751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 60286a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 6029afc32f7eSTheodore Ts'o es->s_kbytes_written = 6030e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 60318446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6032e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6033e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 603457042651STheodore Ts'o ext4_free_blocks_count_set(es, 6035e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6036e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6037e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 60387f93cff9STheodore Ts'o es->s_free_inodes_count = 60397f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6040e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6041c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6042c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6043c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6044c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6045c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6046c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6047c92dc856SJan Kara &es->s_first_error_time_hi, 6048c92dc856SJan Kara sbi->s_first_error_time); 6049c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 6050c92dc856SJan Kara sizeof(es->s_first_error_func)); 6051c92dc856SJan Kara es->s_first_error_line = 6052c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6053c92dc856SJan Kara es->s_first_error_ino = 6054c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6055c92dc856SJan Kara es->s_first_error_block = 6056c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6057c92dc856SJan Kara es->s_first_error_errcode = 6058c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6059c92dc856SJan Kara } 6060c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6061c92dc856SJan Kara &es->s_last_error_time_hi, 6062c92dc856SJan Kara sbi->s_last_error_time); 6063c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 6064c92dc856SJan Kara sizeof(es->s_last_error_func)); 6065c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6066c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6067c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6068c92dc856SJan Kara es->s_last_error_errcode = 6069c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6070c92dc856SJan Kara /* 6071c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6072c92dc856SJan Kara * started already 6073c92dc856SJan Kara */ 6074c92dc856SJan Kara if (!es->s_error_count) 6075c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6076c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6077c92dc856SJan Kara sbi->s_add_error_count = 0; 6078c92dc856SJan Kara } 6079c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6080c92dc856SJan Kara 608106db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 60822d01ddc8SJan Kara unlock_buffer(sbh); 60832d01ddc8SJan Kara } 60842d01ddc8SJan Kara 60852d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 60862d01ddc8SJan Kara { 60872d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 60882d01ddc8SJan Kara 6089f88f1466SFengnan Chang if (!sbh) 6090f88f1466SFengnan Chang return -EINVAL; 6091f88f1466SFengnan Chang if (block_device_ejected(sb)) 6092f88f1466SFengnan Chang return -ENODEV; 60932d01ddc8SJan Kara 60942d01ddc8SJan Kara ext4_update_super(sb); 60952d01ddc8SJan Kara 609615baa7dcSZhang Yi lock_buffer(sbh); 609715baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 609815baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 609915baa7dcSZhang Yi unlock_buffer(sbh); 610015baa7dcSZhang Yi return -EIO; 610115baa7dcSZhang Yi } 610215baa7dcSZhang Yi 6103e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 61044743f839SPranay Kr. Srivastava /* 61054743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 61064743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 61074743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 61084743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 61094743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 61104743f839SPranay Kr. Srivastava * write and hope for the best. 61114743f839SPranay Kr. Srivastava */ 61124743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 61134743f839SPranay Kr. Srivastava "superblock detected"); 61144743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 61154743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 61164743f839SPranay Kr. Srivastava } 611715baa7dcSZhang Yi get_bh(sbh); 611815baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 611915baa7dcSZhang Yi clear_buffer_dirty(sbh); 612015baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 61211420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 61221420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 612315baa7dcSZhang Yi wait_on_buffer(sbh); 6124c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6125b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6126b31e1552SEric Sandeen "superblock"); 6127914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6128914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 612915baa7dcSZhang Yi return -EIO; 6130914258bfSTheodore Ts'o } 613115baa7dcSZhang Yi return 0; 6132ac27a0ecSDave Kleikamp } 6133ac27a0ecSDave Kleikamp 6134ac27a0ecSDave Kleikamp /* 6135ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6136ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6137ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6138ac27a0ecSDave Kleikamp */ 613911215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6140617ba13bSMingming Cao struct ext4_super_block *es) 6141ac27a0ecSDave Kleikamp { 614211215630SJan Kara int err; 6143617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6144ac27a0ecSDave Kleikamp 6145e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 614611215630SJan Kara if (journal != NULL) { 614711215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 614811215630SJan Kara "mounted!"); 614911215630SJan Kara return -EFSCORRUPTED; 615011215630SJan Kara } 615111215630SJan Kara return 0; 61520390131bSFrank Mayhar } 6153dab291afSMingming Cao jbd2_journal_lock_updates(journal); 615401d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 615511215630SJan Kara if (err < 0) 61567ffe1ea8SHidehiro Kawai goto out; 61577ffe1ea8SHidehiro Kawai 615802f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 615902f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 616002f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 616102f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 616202f310fcSJan Kara err = -EFSCORRUPTED; 616302f310fcSJan Kara goto out; 616402f310fcSJan Kara } 6165e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 616602f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 61674392fbc4SJan Kara ext4_commit_super(sb); 6168ac27a0ecSDave Kleikamp } 61697ffe1ea8SHidehiro Kawai out: 6170dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 617111215630SJan Kara return err; 6172ac27a0ecSDave Kleikamp } 6173ac27a0ecSDave Kleikamp 6174ac27a0ecSDave Kleikamp /* 6175ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6176ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6177ac27a0ecSDave Kleikamp * main filesystem now. 6178ac27a0ecSDave Kleikamp */ 617911215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6180617ba13bSMingming Cao struct ext4_super_block *es) 6181ac27a0ecSDave Kleikamp { 6182ac27a0ecSDave Kleikamp journal_t *journal; 6183ac27a0ecSDave Kleikamp int j_errno; 6184ac27a0ecSDave Kleikamp const char *errstr; 6185ac27a0ecSDave Kleikamp 618611215630SJan Kara if (!ext4_has_feature_journal(sb)) { 618711215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 618811215630SJan Kara return -EFSCORRUPTED; 618911215630SJan Kara } 61900390131bSFrank Mayhar 6191617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6192ac27a0ecSDave Kleikamp 6193ac27a0ecSDave Kleikamp /* 6194ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6195617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6196ac27a0ecSDave Kleikamp */ 6197ac27a0ecSDave Kleikamp 6198dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6199ac27a0ecSDave Kleikamp if (j_errno) { 6200ac27a0ecSDave Kleikamp char nbuf[16]; 6201ac27a0ecSDave Kleikamp 6202617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 620312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6204ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 6205ac27a0ecSDave Kleikamp 6206617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6207617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6208f57886caSYe Bin j_errno = ext4_commit_super(sb); 6209f57886caSYe Bin if (j_errno) 6210f57886caSYe Bin return j_errno; 6211f57886caSYe Bin ext4_warning(sb, "Marked fs in need of filesystem check."); 6212ac27a0ecSDave Kleikamp 6213dab291afSMingming Cao jbd2_journal_clear_err(journal); 6214d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6215ac27a0ecSDave Kleikamp } 621611215630SJan Kara return 0; 6217ac27a0ecSDave Kleikamp } 6218ac27a0ecSDave Kleikamp 6219ac27a0ecSDave Kleikamp /* 6220ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6221ac27a0ecSDave Kleikamp * and wait on the commit. 6222ac27a0ecSDave Kleikamp */ 6223617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6224ac27a0ecSDave Kleikamp { 6225ac27a0ecSDave Kleikamp journal_t *journal; 6226ac27a0ecSDave Kleikamp 6227bc98a42cSDavid Howells if (sb_rdonly(sb)) 6228ac27a0ecSDave Kleikamp return 0; 6229ac27a0ecSDave Kleikamp 6230617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6231b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6232ac27a0ecSDave Kleikamp } 6233ac27a0ecSDave Kleikamp 6234617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6235ac27a0ecSDave Kleikamp { 623614ce0cb4STheodore Ts'o int ret = 0; 62379eddacf9SJan Kara tid_t target; 623806a407f1SDmitry Monakhov bool needs_barrier = false; 62398d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6240ac27a0ecSDave Kleikamp 624149598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 62420db1ff22STheodore Ts'o return 0; 62430db1ff22STheodore Ts'o 62449bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 62452e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6246a1177825SJan Kara /* 6247a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6248a1177825SJan Kara * no dirty dquots 6249a1177825SJan Kara */ 6250a1177825SJan Kara dquot_writeback_dquots(sb, -1); 625106a407f1SDmitry Monakhov /* 625206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 625306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 625406a407f1SDmitry Monakhov * transaction_commit will do it for us. 625506a407f1SDmitry Monakhov */ 6256bda32530STheodore Ts'o if (sbi->s_journal) { 625706a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 625806a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 625906a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 626006a407f1SDmitry Monakhov needs_barrier = true; 626106a407f1SDmitry Monakhov 62628d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6263ac27a0ecSDave Kleikamp if (wait) 6264bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6265bda32530STheodore Ts'o target); 62660390131bSFrank Mayhar } 6267bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6268bda32530STheodore Ts'o needs_barrier = true; 626906a407f1SDmitry Monakhov if (needs_barrier) { 627006a407f1SDmitry Monakhov int err; 6271c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 627206a407f1SDmitry Monakhov if (!ret) 627306a407f1SDmitry Monakhov ret = err; 627406a407f1SDmitry Monakhov } 627506a407f1SDmitry Monakhov 627606a407f1SDmitry Monakhov return ret; 627706a407f1SDmitry Monakhov } 627806a407f1SDmitry Monakhov 6279ac27a0ecSDave Kleikamp /* 6280ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6281ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6282be4f27d3SYongqiang Yang * 6283be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 62848e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 62858e8ad8a5SJan Kara * modifications. 6286ac27a0ecSDave Kleikamp */ 6287c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6288ac27a0ecSDave Kleikamp { 6289c4be0c1dSTakashi Sato int error = 0; 6290c4be0c1dSTakashi Sato journal_t *journal; 6291ac27a0ecSDave Kleikamp 6292bc98a42cSDavid Howells if (sb_rdonly(sb)) 62939ca92389STheodore Ts'o return 0; 62949ca92389STheodore Ts'o 6295c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6296ac27a0ecSDave Kleikamp 6297bb044576STheodore Ts'o if (journal) { 6298ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6299dab291afSMingming Cao jbd2_journal_lock_updates(journal); 63007ffe1ea8SHidehiro Kawai 63017ffe1ea8SHidehiro Kawai /* 6302bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6303bb044576STheodore Ts'o * flush the journal. 63047ffe1ea8SHidehiro Kawai */ 630501d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 63066b0310fbSEric Sandeen if (error < 0) 63076b0310fbSEric Sandeen goto out; 6308ac27a0ecSDave Kleikamp 6309ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6310e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 631102f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 631202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6313c642dc9eSEric Sandeen } 6314c642dc9eSEric Sandeen 63154392fbc4SJan Kara error = ext4_commit_super(sb); 63166b0310fbSEric Sandeen out: 6317bb044576STheodore Ts'o if (journal) 63188e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6319bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 63206b0310fbSEric Sandeen return error; 6321ac27a0ecSDave Kleikamp } 6322ac27a0ecSDave Kleikamp 6323ac27a0ecSDave Kleikamp /* 6324ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6325ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6326ac27a0ecSDave Kleikamp */ 6327c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6328ac27a0ecSDave Kleikamp { 6329bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 63309ca92389STheodore Ts'o return 0; 63319ca92389STheodore Ts'o 6332c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 63339ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6334e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 633502f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 633602f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6337c642dc9eSEric Sandeen } 6338c642dc9eSEric Sandeen 63394392fbc4SJan Kara ext4_commit_super(sb); 6340c4be0c1dSTakashi Sato return 0; 6341ac27a0ecSDave Kleikamp } 6342ac27a0ecSDave Kleikamp 6343673c6100STheodore Ts'o /* 6344673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6345673c6100STheodore Ts'o */ 6346673c6100STheodore Ts'o struct ext4_mount_options { 6347673c6100STheodore Ts'o unsigned long s_mount_opt; 6348a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 634908cefc7aSEric W. Biederman kuid_t s_resuid; 635008cefc7aSEric W. Biederman kgid_t s_resgid; 6351673c6100STheodore Ts'o unsigned long s_commit_interval; 6352673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6353673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6354673c6100STheodore Ts'o int s_jquota_fmt; 6355a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6356673c6100STheodore Ts'o #endif 6357673c6100STheodore Ts'o }; 6358673c6100STheodore Ts'o 6359960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6360ac27a0ecSDave Kleikamp { 63617edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6362617ba13bSMingming Cao struct ext4_super_block *es; 6363617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6364960e0ab6SLukas Czerner unsigned long old_sb_flags; 6365617ba13bSMingming Cao struct ext4_mount_options old_opts; 63668a266467STheodore Ts'o ext4_group_t g; 6367c5e06d10SJohann Lombardi int err = 0; 6368ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 63693bbef91bSAustin Kim int enable_quota = 0; 637003dafb5fSChen Gang int i, j; 637133458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6372ac27a0ecSDave Kleikamp #endif 6373b237e304SHarshad Shirwadkar 637421ac738eSChengguang Xu 6375ac27a0ecSDave Kleikamp /* Store the original options */ 6376ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6377ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6378a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6379ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6380ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6381ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 638230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 638330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6384ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6385ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6386a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 638703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 638833458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 638933458eabSTheodore Ts'o 639033458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 639103dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 639203dafb5fSChen Gang for (j = 0; j < i; j++) 639303dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 639403dafb5fSChen Gang return -ENOMEM; 639503dafb5fSChen Gang } 639603dafb5fSChen Gang } else 639703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6398ac27a0ecSDave Kleikamp #endif 6399e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6400b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 64017edfd85bSLukas Czerner ctx->journal_ioprio = 6402b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6403e4e58e5dSOjaswin Mujoo else 6404e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6405e4e58e5dSOjaswin Mujoo 6406e4e58e5dSOjaswin Mujoo } 6407ac27a0ecSDave Kleikamp 64087edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6409ac27a0ecSDave Kleikamp 64106b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 64116b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 64126b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 64132d5b86e0SEric Sandeen "during remount not supported; ignoring"); 64142d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6415c6d3d56dSDarrick J. Wong } 6416c6d3d56dSDarrick J. Wong 64176ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 64186ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 64196ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64206ae6514bSPiotr Sarna "both data=journal and delalloc"); 64216ae6514bSPiotr Sarna err = -EINVAL; 64226ae6514bSPiotr Sarna goto restore_opts; 64236ae6514bSPiotr Sarna } 64246ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 64256ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64266ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 64276ae6514bSPiotr Sarna err = -EINVAL; 64286ae6514bSPiotr Sarna goto restore_opts; 64296ae6514bSPiotr Sarna } 6430ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6431ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6432ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6433ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6434ab04df78SJan Kara err = -EINVAL; 6435ab04df78SJan Kara goto restore_opts; 6436ab04df78SJan Kara } 6437923ae0ffSRoss Zwisler } 6438923ae0ffSRoss Zwisler 6439cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6440cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6441cdb7ee4cSTahsin Erdogan err = -EINVAL; 6442cdb7ee4cSTahsin Erdogan goto restore_opts; 6443cdb7ee4cSTahsin Erdogan } 6444cdb7ee4cSTahsin Erdogan 64459b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6446124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6447ac27a0ecSDave Kleikamp 64481751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 64491751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6450ac27a0ecSDave Kleikamp 6451ac27a0ecSDave Kleikamp es = sbi->s_es; 6452ac27a0ecSDave Kleikamp 6453b3881f74STheodore Ts'o if (sbi->s_journal) { 6454617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 64557edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6456b3881f74STheodore Ts'o } 6457ac27a0ecSDave Kleikamp 6458c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6459c92dc856SJan Kara flush_work(&sbi->s_error_work); 6460c92dc856SJan Kara 6461960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 64629b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6463ac27a0ecSDave Kleikamp err = -EROFS; 6464ac27a0ecSDave Kleikamp goto restore_opts; 6465ac27a0ecSDave Kleikamp } 6466ac27a0ecSDave Kleikamp 6467960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 646838c03b34STheodore Ts'o err = sync_filesystem(sb); 646938c03b34STheodore Ts'o if (err < 0) 647038c03b34STheodore Ts'o goto restore_opts; 64710f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 64720f0dd62fSChristoph Hellwig if (err < 0) 6473c79d967dSChristoph Hellwig goto restore_opts; 6474c79d967dSChristoph Hellwig 6475ac27a0ecSDave Kleikamp /* 6476ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6477ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6478ac27a0ecSDave Kleikamp */ 64791751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6480ac27a0ecSDave Kleikamp 6481ac27a0ecSDave Kleikamp /* 6482ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6483ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6484ac27a0ecSDave Kleikamp * mark the partition as valid again. 6485ac27a0ecSDave Kleikamp */ 6486617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6487617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6488ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6489ac27a0ecSDave Kleikamp 649011215630SJan Kara if (sbi->s_journal) { 649111215630SJan Kara /* 649211215630SJan Kara * We let remount-ro finish even if marking fs 649311215630SJan Kara * as clean failed... 649411215630SJan Kara */ 6495617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 649611215630SJan Kara } 6497ac27a0ecSDave Kleikamp } else { 6498a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6499e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 65002cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6501ac27a0ecSDave Kleikamp err = -EROFS; 6502ac27a0ecSDave Kleikamp goto restore_opts; 6503ac27a0ecSDave Kleikamp } 6504ead6596bSEric Sandeen /* 65058a266467STheodore Ts'o * Make sure the group descriptor checksums 65060b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 65078a266467STheodore Ts'o */ 65088a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 65098a266467STheodore Ts'o struct ext4_group_desc *gdp = 65108a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 65118a266467STheodore Ts'o 6512feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6513b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6514b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6515e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 65168a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 65176a797d27SDarrick J. Wong err = -EFSBADCRC; 65188a266467STheodore Ts'o goto restore_opts; 65198a266467STheodore Ts'o } 65208a266467STheodore Ts'o } 65218a266467STheodore Ts'o 65228a266467STheodore Ts'o /* 6523ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6524ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6525ead6596bSEric Sandeen * require a full umount/remount for now. 6526ead6596bSEric Sandeen */ 652702f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6528b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6529ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6530ead6596bSEric Sandeen "orphan inode list. Please " 6531b31e1552SEric Sandeen "umount/remount instead"); 6532ead6596bSEric Sandeen err = -EINVAL; 6533ead6596bSEric Sandeen goto restore_opts; 6534ead6596bSEric Sandeen } 6535ead6596bSEric Sandeen 6536ac27a0ecSDave Kleikamp /* 6537ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6538ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6539ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6540ac27a0ecSDave Kleikamp * the partition.) 6541ac27a0ecSDave Kleikamp */ 654211215630SJan Kara if (sbi->s_journal) { 654311215630SJan Kara err = ext4_clear_journal_err(sb, es); 654411215630SJan Kara if (err) 654511215630SJan Kara goto restore_opts; 654611215630SJan Kara } 6547c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6548c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6549c89128a0SJaegeuk Kim 6550c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6551c89128a0SJaegeuk Kim if (err) 6552c89128a0SJaegeuk Kim goto restore_opts; 6553c89128a0SJaegeuk Kim 65541751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6555e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6556c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6557c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6558c5e06d10SJohann Lombardi err = -EROFS; 6559c5e06d10SJohann Lombardi goto restore_opts; 6560c5e06d10SJohann Lombardi } 65613bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6562c79d967dSChristoph Hellwig enable_quota = 1; 65633bbef91bSAustin Kim #endif 6564ac27a0ecSDave Kleikamp } 6565ac27a0ecSDave Kleikamp } 6566bfff6873SLukas Czerner 6567bfff6873SLukas Czerner /* 6568bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6569bfff6873SLukas Czerner * current settings 6570bfff6873SLukas Czerner */ 6571bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6572bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6573bfff6873SLukas Czerner else { 6574bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6575bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6576bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6577bfff6873SLukas Czerner } 6578bfff6873SLukas Czerner 65790f5bde1dSJan Kara /* 65800f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 65810f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 65820f5bde1dSJan Kara * succeed. 65830f5bde1dSJan Kara */ 6584dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6585d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6586d176b1f6SJan Kara if (err) 6587d176b1f6SJan Kara goto restore_opts; 65880f5bde1dSJan Kara } 6589d176b1f6SJan Kara 6590c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 65914392fbc4SJan Kara err = ext4_commit_super(sb); 6592c89128a0SJaegeuk Kim if (err) 6593c89128a0SJaegeuk Kim goto restore_opts; 6594c89128a0SJaegeuk Kim } 65950390131bSFrank Mayhar 6596ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6597ac27a0ecSDave Kleikamp /* Release old quota file names */ 6598a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6599ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 66007c319d32SAditya Kali if (enable_quota) { 66017c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 66020f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6603e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 66047c319d32SAditya Kali err = ext4_enable_quotas(sb); 660507724f98STheodore Ts'o if (err) 66067c319d32SAditya Kali goto restore_opts; 66077c319d32SAditya Kali } 66087c319d32SAditya Kali } 66097c319d32SAditya Kali #endif 6610dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66110f5bde1dSJan Kara ext4_release_system_zone(sb); 6612d4c402d9SCurt Wohlgemuth 661361bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 661461bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 661561bb4a1cSTheodore Ts'o 6616ac27a0ecSDave Kleikamp return 0; 66170b8e58a1SAndreas Dilger 6618ac27a0ecSDave Kleikamp restore_opts: 6619ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6620ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6621a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6622ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6623ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6624ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 662530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 662630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6627dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66280f5bde1dSJan Kara ext4_release_system_zone(sb); 6629ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6630ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6631a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 663233458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 663333458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6634ac27a0ecSDave Kleikamp } 663533458eabSTheodore Ts'o synchronize_rcu(); 663633458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 663733458eabSTheodore Ts'o kfree(to_free[i]); 6638ac27a0ecSDave Kleikamp #endif 663961bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 664061bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6641ac27a0ecSDave Kleikamp return err; 6642ac27a0ecSDave Kleikamp } 6643ac27a0ecSDave Kleikamp 6644cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 66457edfd85bSLukas Czerner { 6646cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 66477edfd85bSLukas Czerner int ret; 66487edfd85bSLukas Czerner 6649cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 66507edfd85bSLukas Czerner 6651cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 66527edfd85bSLukas Czerner if (ret < 0) 66537edfd85bSLukas Czerner return ret; 6654cebe85d5SLukas Czerner 6655960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6656cebe85d5SLukas Czerner if (ret < 0) 6657cebe85d5SLukas Czerner return ret; 6658cebe85d5SLukas Czerner 6659bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted %pU. Quota mode: %s.", 6660bb0fbc78SLukas Czerner &sb->s_uuid, ext4_quota_mode(sb)); 6661cebe85d5SLukas Czerner 6662cebe85d5SLukas Czerner return 0; 66637edfd85bSLukas Czerner } 66647edfd85bSLukas Czerner 6665689c958cSLi Xi #ifdef CONFIG_QUOTA 6666689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6667689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6668689c958cSLi Xi { 6669689c958cSLi Xi struct kqid qid; 6670689c958cSLi Xi struct dquot *dquot; 6671689c958cSLi Xi u64 limit; 6672689c958cSLi Xi u64 curblock; 6673689c958cSLi Xi 6674689c958cSLi Xi qid = make_kqid_projid(projid); 6675689c958cSLi Xi dquot = dqget(sb, qid); 6676689c958cSLi Xi if (IS_ERR(dquot)) 6677689c958cSLi Xi return PTR_ERR(dquot); 66787b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6679689c958cSLi Xi 6680a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6681a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 668257c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 668357c32ea4SChengguang Xu 6684689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6685f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6686f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6687689c958cSLi Xi buf->f_blocks = limit; 6688689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6689689c958cSLi Xi (buf->f_blocks > curblock) ? 6690689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6691689c958cSLi Xi } 6692689c958cSLi Xi 6693a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6694a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6695689c958cSLi Xi if (limit && buf->f_files > limit) { 6696689c958cSLi Xi buf->f_files = limit; 6697689c958cSLi Xi buf->f_ffree = 6698689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6699689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6700689c958cSLi Xi } 6701689c958cSLi Xi 67027b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6703689c958cSLi Xi dqput(dquot); 6704689c958cSLi Xi return 0; 6705689c958cSLi Xi } 6706689c958cSLi Xi #endif 6707689c958cSLi Xi 6708617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6709ac27a0ecSDave Kleikamp { 6710ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6711617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6712617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 671327dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6714d02a9391SKazuya Mio s64 bfree; 671527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6716ac27a0ecSDave Kleikamp 6717952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6718952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6719ac27a0ecSDave Kleikamp 6720617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6721ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6722b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 672357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 672457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6725d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 672657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 672727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 672827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 672927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6730ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6731ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 673252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6733617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 67349591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 67350b8e58a1SAndreas Dilger 6736689c958cSLi Xi #ifdef CONFIG_QUOTA 6737689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6738689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6739689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6740689c958cSLi Xi #endif 6741ac27a0ecSDave Kleikamp return 0; 6742ac27a0ecSDave Kleikamp } 6743ac27a0ecSDave Kleikamp 6744ac27a0ecSDave Kleikamp 6745ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6746ac27a0ecSDave Kleikamp 6747bc8230eeSJan Kara /* 6748bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6749bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6750bc8230eeSJan Kara */ 6751ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6752ac27a0ecSDave Kleikamp { 67534c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6754ac27a0ecSDave Kleikamp } 6755ac27a0ecSDave Kleikamp 6756617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6757ac27a0ecSDave Kleikamp { 6758ac27a0ecSDave Kleikamp int ret, err; 6759ac27a0ecSDave Kleikamp handle_t *handle; 6760ac27a0ecSDave Kleikamp struct inode *inode; 6761ac27a0ecSDave Kleikamp 6762ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 67639924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6764617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6765ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6766ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6767ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6768617ba13bSMingming Cao err = ext4_journal_stop(handle); 6769ac27a0ecSDave Kleikamp if (!ret) 6770ac27a0ecSDave Kleikamp ret = err; 6771ac27a0ecSDave Kleikamp return ret; 6772ac27a0ecSDave Kleikamp } 6773ac27a0ecSDave Kleikamp 6774617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6775ac27a0ecSDave Kleikamp { 6776ac27a0ecSDave Kleikamp int ret, err; 6777ac27a0ecSDave Kleikamp handle_t *handle; 6778ac27a0ecSDave Kleikamp 67799924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6780617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6781ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6782ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6783ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6784617ba13bSMingming Cao err = ext4_journal_stop(handle); 6785ac27a0ecSDave Kleikamp if (!ret) 6786ac27a0ecSDave Kleikamp ret = err; 6787ac27a0ecSDave Kleikamp return ret; 6788ac27a0ecSDave Kleikamp } 6789ac27a0ecSDave Kleikamp 6790617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6791ac27a0ecSDave Kleikamp { 6792ac27a0ecSDave Kleikamp int ret, err; 6793ac27a0ecSDave Kleikamp handle_t *handle; 6794ac27a0ecSDave Kleikamp 67959924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6796617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 67979c3013e9SJan Kara if (IS_ERR(handle)) { 67989c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 67999c3013e9SJan Kara dquot_release(dquot); 6800ac27a0ecSDave Kleikamp return PTR_ERR(handle); 68019c3013e9SJan Kara } 6802ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6803617ba13bSMingming Cao err = ext4_journal_stop(handle); 6804ac27a0ecSDave Kleikamp if (!ret) 6805ac27a0ecSDave Kleikamp ret = err; 6806ac27a0ecSDave Kleikamp return ret; 6807ac27a0ecSDave Kleikamp } 6808ac27a0ecSDave Kleikamp 6809617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6810ac27a0ecSDave Kleikamp { 6811262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6812262b4662SJan Kara 6813f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6814ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6815617ba13bSMingming Cao return ext4_write_dquot(dquot); 6816ac27a0ecSDave Kleikamp } else { 6817ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6818ac27a0ecSDave Kleikamp } 6819ac27a0ecSDave Kleikamp } 6820ac27a0ecSDave Kleikamp 6821617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6822ac27a0ecSDave Kleikamp { 6823ac27a0ecSDave Kleikamp int ret, err; 6824ac27a0ecSDave Kleikamp handle_t *handle; 6825ac27a0ecSDave Kleikamp 6826ac27a0ecSDave Kleikamp /* Data block + inode block */ 6827f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6828ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6829ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6830ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6831617ba13bSMingming Cao err = ext4_journal_stop(handle); 6832ac27a0ecSDave Kleikamp if (!ret) 6833ac27a0ecSDave Kleikamp ret = err; 6834ac27a0ecSDave Kleikamp return ret; 6835ac27a0ecSDave Kleikamp } 6836ac27a0ecSDave Kleikamp 6837daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6838daf647d2STheodore Ts'o { 6839daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6840daf647d2STheodore Ts'o 6841daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6842daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6843daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6844daf647d2STheodore Ts'o * because the name of the lock is set using the 6845daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6846daf647d2STheodore Ts'o */ 6847daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6848daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6849daf647d2STheodore Ts'o } 6850daf647d2STheodore Ts'o 6851ac27a0ecSDave Kleikamp /* 6852ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6853ac27a0ecSDave Kleikamp */ 6854617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 68558c54ca9cSAl Viro const struct path *path) 6856ac27a0ecSDave Kleikamp { 6857ac27a0ecSDave Kleikamp int err; 6858ac27a0ecSDave Kleikamp 6859ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6860ac27a0ecSDave Kleikamp return -EINVAL; 68610623543bSJan Kara 6862ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6863d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6864ac27a0ecSDave Kleikamp return -EXDEV; 6865e0770e91SJan Kara 6866e0770e91SJan Kara /* Quota already enabled for this file? */ 6867e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6868e0770e91SJan Kara return -EBUSY; 6869e0770e91SJan Kara 68700623543bSJan Kara /* Journaling quota? */ 68710623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 68722b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6873f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6874b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6875b31e1552SEric Sandeen "Quota file not on filesystem root. " 6876b31e1552SEric Sandeen "Journaled quota will not work"); 687791389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 687891389240SJan Kara } else { 687991389240SJan Kara /* 688091389240SJan Kara * Clear the flag just in case mount options changed since 688191389240SJan Kara * last time. 688291389240SJan Kara */ 688391389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 68840623543bSJan Kara } 68850623543bSJan Kara 6886daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6887daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 688815fc69bbSJan Kara if (!err) { 6889957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6890957153fcSJan Kara handle_t *handle; 6891957153fcSJan Kara 689261a92987SJan Kara /* 689361a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 689461a92987SJan Kara * files. If this fails, we return success anyway since quotas 689561a92987SJan Kara * are already enabled and this is not a hard failure. 689661a92987SJan Kara */ 6897957153fcSJan Kara inode_lock(inode); 6898957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6899957153fcSJan Kara if (IS_ERR(handle)) 6900957153fcSJan Kara goto unlock_inode; 6901957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6902957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6903957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 69044209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6905957153fcSJan Kara ext4_journal_stop(handle); 6906957153fcSJan Kara unlock_inode: 6907957153fcSJan Kara inode_unlock(inode); 690815fc69bbSJan Kara if (err) 690915fc69bbSJan Kara dquot_quota_off(sb, type); 6910957153fcSJan Kara } 691115fc69bbSJan Kara if (err) 691215fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 691315fc69bbSJan Kara I_DATA_SEM_NORMAL); 6914daf647d2STheodore Ts'o return err; 6915ac27a0ecSDave Kleikamp } 6916ac27a0ecSDave Kleikamp 691707342ec2SBaokun Li static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum) 691807342ec2SBaokun Li { 691907342ec2SBaokun Li switch (type) { 692007342ec2SBaokun Li case USRQUOTA: 692107342ec2SBaokun Li return qf_inum == EXT4_USR_QUOTA_INO; 692207342ec2SBaokun Li case GRPQUOTA: 692307342ec2SBaokun Li return qf_inum == EXT4_GRP_QUOTA_INO; 692407342ec2SBaokun Li case PRJQUOTA: 692507342ec2SBaokun Li return qf_inum >= EXT4_GOOD_OLD_FIRST_INO; 692607342ec2SBaokun Li default: 692707342ec2SBaokun Li BUG(); 692807342ec2SBaokun Li } 692907342ec2SBaokun Li } 693007342ec2SBaokun Li 69317c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 69327c319d32SAditya Kali unsigned int flags) 69337c319d32SAditya Kali { 69347c319d32SAditya Kali int err; 69357c319d32SAditya Kali struct inode *qf_inode; 6936a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69377c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6938689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6939689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69407c319d32SAditya Kali }; 69417c319d32SAditya Kali 6942e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 69437c319d32SAditya Kali 69447c319d32SAditya Kali if (!qf_inums[type]) 69457c319d32SAditya Kali return -EPERM; 69467c319d32SAditya Kali 694707342ec2SBaokun Li if (!ext4_check_quota_inum(type, qf_inums[type])) { 694807342ec2SBaokun Li ext4_error(sb, "Bad quota inum: %lu, type: %d", 694907342ec2SBaokun Li qf_inums[type], type); 695007342ec2SBaokun Li return -EUCLEAN; 695107342ec2SBaokun Li } 695207342ec2SBaokun Li 69538a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 69547c319d32SAditya Kali if (IS_ERR(qf_inode)) { 695507342ec2SBaokun Li ext4_error(sb, "Bad quota inode: %lu, type: %d", 695607342ec2SBaokun Li qf_inums[type], type); 69577c319d32SAditya Kali return PTR_ERR(qf_inode); 69587c319d32SAditya Kali } 69597c319d32SAditya Kali 6960bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6961bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6962daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 69637212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6964daf647d2STheodore Ts'o if (err) 6965daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 696661157b24SPan Bian iput(qf_inode); 69677c319d32SAditya Kali 69687c319d32SAditya Kali return err; 69697c319d32SAditya Kali } 69707c319d32SAditya Kali 69717c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 697225c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 69737c319d32SAditya Kali { 69747c319d32SAditya Kali int type, err = 0; 6975a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 69767c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6977689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6978689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 69797c319d32SAditya Kali }; 698049da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 698149da9392SJan Kara test_opt(sb, USRQUOTA), 698249da9392SJan Kara test_opt(sb, GRPQUOTA), 698349da9392SJan Kara test_opt(sb, PRJQUOTA), 698449da9392SJan Kara }; 69857c319d32SAditya Kali 698691389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6987a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 69887c319d32SAditya Kali if (qf_inums[type]) { 69897c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 699049da9392SJan Kara DQUOT_USAGE_ENABLED | 699149da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 69927c319d32SAditya Kali if (err) { 69937c319d32SAditya Kali ext4_warning(sb, 699472ba7450STheodore Ts'o "Failed to enable quota tracking " 699507342ec2SBaokun Li "(type=%d, err=%d, ino=%lu). " 699607342ec2SBaokun Li "Please run e2fsck to fix.", type, 699707342ec2SBaokun Li err, qf_inums[type]); 69984013d47aSJan Kara for (type--; type >= 0; type--) { 69994013d47aSJan Kara struct inode *inode; 70004013d47aSJan Kara 70014013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 70024013d47aSJan Kara if (inode) 70034013d47aSJan Kara inode = igrab(inode); 70047f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 70054013d47aSJan Kara if (inode) { 70064013d47aSJan Kara lockdep_set_quota_inode(inode, 70074013d47aSJan Kara I_DATA_SEM_NORMAL); 70084013d47aSJan Kara iput(inode); 70094013d47aSJan Kara } 70104013d47aSJan Kara } 70117f144fd0SJunichi Uekawa 70127c319d32SAditya Kali return err; 70137c319d32SAditya Kali } 70147c319d32SAditya Kali } 70157c319d32SAditya Kali } 70167c319d32SAditya Kali return 0; 70177c319d32SAditya Kali } 70187c319d32SAditya Kali 7019ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 7020ca0e05e4SDmitry Monakhov { 702121f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 702221f97697SJan Kara handle_t *handle; 7023957153fcSJan Kara int err; 702421f97697SJan Kara 702587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 702687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 702787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 7028ca0e05e4SDmitry Monakhov sync_filesystem(sb); 7029ca0e05e4SDmitry Monakhov 7030957153fcSJan Kara if (!inode || !igrab(inode)) 70310b268590SAmir Goldstein goto out; 70320b268590SAmir Goldstein 7033957153fcSJan Kara err = dquot_quota_off(sb, type); 7034964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 7035957153fcSJan Kara goto out_put; 7036957153fcSJan Kara 7037957153fcSJan Kara inode_lock(inode); 703861a92987SJan Kara /* 703961a92987SJan Kara * Update modification times of quota files when userspace can 704061a92987SJan Kara * start looking at them. If we fail, we return success anyway since 704161a92987SJan Kara * this is not a hard failure and quotas are already disabled. 704261a92987SJan Kara */ 70439924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 70444209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 70454209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7046957153fcSJan Kara goto out_unlock; 70474209ae12SHarshad Shirwadkar } 7048957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7049957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 7050eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 70514209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 705221f97697SJan Kara ext4_journal_stop(handle); 7053957153fcSJan Kara out_unlock: 7054957153fcSJan Kara inode_unlock(inode); 7055957153fcSJan Kara out_put: 7056964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7057957153fcSJan Kara iput(inode); 7058957153fcSJan Kara return err; 705921f97697SJan Kara out: 7060ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7061ca0e05e4SDmitry Monakhov } 7062ca0e05e4SDmitry Monakhov 7063ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7064ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7065ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7066ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7067617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7068ac27a0ecSDave Kleikamp size_t len, loff_t off) 7069ac27a0ecSDave Kleikamp { 7070ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7071725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7072ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7073ac27a0ecSDave Kleikamp int tocopy; 7074ac27a0ecSDave Kleikamp size_t toread; 7075ac27a0ecSDave Kleikamp struct buffer_head *bh; 7076ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7077ac27a0ecSDave Kleikamp 7078ac27a0ecSDave Kleikamp if (off > i_size) 7079ac27a0ecSDave Kleikamp return 0; 7080ac27a0ecSDave Kleikamp if (off+len > i_size) 7081ac27a0ecSDave Kleikamp len = i_size-off; 7082ac27a0ecSDave Kleikamp toread = len; 7083ac27a0ecSDave Kleikamp while (toread > 0) { 708466267814SJiangshan Yi tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 70851c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 70861c215028STheodore Ts'o if (IS_ERR(bh)) 70871c215028STheodore Ts'o return PTR_ERR(bh); 7088ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7089ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7090ac27a0ecSDave Kleikamp else 7091ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7092ac27a0ecSDave Kleikamp brelse(bh); 7093ac27a0ecSDave Kleikamp offset = 0; 7094ac27a0ecSDave Kleikamp toread -= tocopy; 7095ac27a0ecSDave Kleikamp data += tocopy; 7096ac27a0ecSDave Kleikamp blk++; 7097ac27a0ecSDave Kleikamp } 7098ac27a0ecSDave Kleikamp return len; 7099ac27a0ecSDave Kleikamp } 7100ac27a0ecSDave Kleikamp 7101ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7102ac27a0ecSDave Kleikamp * enough credits) */ 7103617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7104ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7105ac27a0ecSDave Kleikamp { 7106ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7107725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 71084209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7109c5e298aeSTheodore Ts'o int retries = 0; 7110ac27a0ecSDave Kleikamp struct buffer_head *bh; 7111ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7112ac27a0ecSDave Kleikamp 7113380a0091SYe Bin if (!handle) { 7114b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7115b31e1552SEric Sandeen " cancelled because transaction is not started", 71169c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 71179c3013e9SJan Kara return -EIO; 71189c3013e9SJan Kara } 711967eeb568SDmitry Monakhov /* 712067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 712167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 712267eeb568SDmitry Monakhov */ 712367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 712467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 712567eeb568SDmitry Monakhov " cancelled because not block aligned", 712667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 712767eeb568SDmitry Monakhov return -EIO; 712867eeb568SDmitry Monakhov } 712967eeb568SDmitry Monakhov 7130c5e298aeSTheodore Ts'o do { 7131c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7132c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7133c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 713445586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7135c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 71361c215028STheodore Ts'o if (IS_ERR(bh)) 71371c215028STheodore Ts'o return PTR_ERR(bh); 7138ac27a0ecSDave Kleikamp if (!bh) 7139ac27a0ecSDave Kleikamp goto out; 71405d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7141188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7142ac27a0ecSDave Kleikamp if (err) { 7143ac27a0ecSDave Kleikamp brelse(bh); 71441c215028STheodore Ts'o return err; 7145ac27a0ecSDave Kleikamp } 7146ac27a0ecSDave Kleikamp lock_buffer(bh); 714767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7148ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7149ac27a0ecSDave Kleikamp unlock_buffer(bh); 71500390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7151ac27a0ecSDave Kleikamp brelse(bh); 7152ac27a0ecSDave Kleikamp out: 715367eeb568SDmitry Monakhov if (inode->i_size < off + len) { 715467eeb568SDmitry Monakhov i_size_write(inode, off + len); 7155617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 71564209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 71574209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 71584209ae12SHarshad Shirwadkar err = err2; 715921f97697SJan Kara } 71604209ae12SHarshad Shirwadkar return err ? err : len; 7161ac27a0ecSDave Kleikamp } 7162ac27a0ecSDave Kleikamp #endif 7163ac27a0ecSDave Kleikamp 7164c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 716524b58424STheodore Ts'o static inline void register_as_ext2(void) 716624b58424STheodore Ts'o { 716724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 716824b58424STheodore Ts'o if (err) 716924b58424STheodore Ts'o printk(KERN_WARNING 717024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 717124b58424STheodore Ts'o } 717224b58424STheodore Ts'o 717324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 717424b58424STheodore Ts'o { 717524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 717624b58424STheodore Ts'o } 71772035e776STheodore Ts'o 71782035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 71792035e776STheodore Ts'o { 7180e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 71812035e776STheodore Ts'o return 0; 7182bc98a42cSDavid Howells if (sb_rdonly(sb)) 71832035e776STheodore Ts'o return 1; 7184e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 71852035e776STheodore Ts'o return 0; 71862035e776STheodore Ts'o return 1; 71872035e776STheodore Ts'o } 718824b58424STheodore Ts'o #else 718924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 719024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 71912035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 719224b58424STheodore Ts'o #endif 719324b58424STheodore Ts'o 719424b58424STheodore Ts'o static inline void register_as_ext3(void) 719524b58424STheodore Ts'o { 719624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 719724b58424STheodore Ts'o if (err) 719824b58424STheodore Ts'o printk(KERN_WARNING 719924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 720024b58424STheodore Ts'o } 720124b58424STheodore Ts'o 720224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 720324b58424STheodore Ts'o { 720424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 720524b58424STheodore Ts'o } 72062035e776STheodore Ts'o 72072035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 72082035e776STheodore Ts'o { 7209e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 72102035e776STheodore Ts'o return 0; 7211e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 72122035e776STheodore Ts'o return 0; 7213bc98a42cSDavid Howells if (sb_rdonly(sb)) 72142035e776STheodore Ts'o return 1; 7215e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 72162035e776STheodore Ts'o return 0; 72172035e776STheodore Ts'o return 1; 72182035e776STheodore Ts'o } 721924b58424STheodore Ts'o 722003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7221ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 722203010a33STheodore Ts'o .name = "ext4", 7223cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7224cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7225ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 722614f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7227ac27a0ecSDave Kleikamp }; 72287f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7229ac27a0ecSDave Kleikamp 7230e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7231e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7232e9e3bcecSEric Sandeen 72335dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7234ac27a0ecSDave Kleikamp { 7235e9e3bcecSEric Sandeen int i, err; 7236c9de560dSAlex Tomas 7237e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 723807c0c5d8SAl Viro ext4_li_info = NULL; 723907c0c5d8SAl Viro 72409a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 724112e9b892SDmitry Monakhov ext4_check_flag_values(); 7242e9e3bcecSEric Sandeen 7243e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7244e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7245e9e3bcecSEric Sandeen 724651865fdaSZheng Liu err = ext4_init_es(); 72476fd058f7STheodore Ts'o if (err) 72486fd058f7STheodore Ts'o return err; 724951865fdaSZheng Liu 72501dc0aa46SEric Whitney err = ext4_init_pending(); 72511dc0aa46SEric Whitney if (err) 725222cfe4b4SEric Biggers goto out7; 725322cfe4b4SEric Biggers 725422cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 725522cfe4b4SEric Biggers if (err) 72561dc0aa46SEric Whitney goto out6; 72571dc0aa46SEric Whitney 725851865fdaSZheng Liu err = ext4_init_pageio(); 725951865fdaSZheng Liu if (err) 7260b5799018STheodore Ts'o goto out5; 726151865fdaSZheng Liu 72625dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7263bd2d0210STheodore Ts'o if (err) 7264b5799018STheodore Ts'o goto out4; 7265857ac889SLukas Czerner 7266b5799018STheodore Ts'o err = ext4_init_sysfs(); 7267dd68314cSTheodore Ts'o if (err) 7268b5799018STheodore Ts'o goto out3; 7269857ac889SLukas Czerner 72705dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7271ac27a0ecSDave Kleikamp if (err) 7272c9de560dSAlex Tomas goto out2; 7273ac27a0ecSDave Kleikamp err = init_inodecache(); 7274ac27a0ecSDave Kleikamp if (err) 7275ac27a0ecSDave Kleikamp goto out1; 7276aa75f4d3SHarshad Shirwadkar 7277aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7278aa75f4d3SHarshad Shirwadkar if (err) 7279aa75f4d3SHarshad Shirwadkar goto out05; 7280aa75f4d3SHarshad Shirwadkar 728124b58424STheodore Ts'o register_as_ext3(); 72822035e776STheodore Ts'o register_as_ext2(); 728303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7284ac27a0ecSDave Kleikamp if (err) 7285ac27a0ecSDave Kleikamp goto out; 7286bfff6873SLukas Czerner 7287ac27a0ecSDave Kleikamp return 0; 7288ac27a0ecSDave Kleikamp out: 728924b58424STheodore Ts'o unregister_as_ext2(); 729024b58424STheodore Ts'o unregister_as_ext3(); 7291ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7292aa75f4d3SHarshad Shirwadkar out05: 7293ac27a0ecSDave Kleikamp destroy_inodecache(); 7294ac27a0ecSDave Kleikamp out1: 72955dabfc78STheodore Ts'o ext4_exit_mballoc(); 72969c191f70ST Makphaibulchoke out2: 7297b5799018STheodore Ts'o ext4_exit_sysfs(); 7298b5799018STheodore Ts'o out3: 7299dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7300b5799018STheodore Ts'o out4: 73015dabfc78STheodore Ts'o ext4_exit_pageio(); 7302b5799018STheodore Ts'o out5: 730322cfe4b4SEric Biggers ext4_exit_post_read_processing(); 73041dc0aa46SEric Whitney out6: 730522cfe4b4SEric Biggers ext4_exit_pending(); 730622cfe4b4SEric Biggers out7: 730751865fdaSZheng Liu ext4_exit_es(); 730851865fdaSZheng Liu 7309ac27a0ecSDave Kleikamp return err; 7310ac27a0ecSDave Kleikamp } 7311ac27a0ecSDave Kleikamp 73125dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7313ac27a0ecSDave Kleikamp { 7314bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 731524b58424STheodore Ts'o unregister_as_ext2(); 731624b58424STheodore Ts'o unregister_as_ext3(); 731703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7318ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7319ac27a0ecSDave Kleikamp destroy_inodecache(); 73205dabfc78STheodore Ts'o ext4_exit_mballoc(); 7321b5799018STheodore Ts'o ext4_exit_sysfs(); 73225dabfc78STheodore Ts'o ext4_exit_system_zone(); 73235dabfc78STheodore Ts'o ext4_exit_pageio(); 732422cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7325dd12ed14SEric Sandeen ext4_exit_es(); 73261dc0aa46SEric Whitney ext4_exit_pending(); 7327ac27a0ecSDave Kleikamp } 7328ac27a0ecSDave Kleikamp 7329ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 733083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7331ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 73327ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 73335dabfc78STheodore Ts'o module_init(ext4_init_fs) 73345dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7335