1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ee73f9a5SJeff Layton #include <linux/iversion.h> 44c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 45c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 489a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 49e5a185c2SLukas Czerner #include <linux/fs_context.h> 50e5a185c2SLukas Czerner #include <linux/fs_parser.h> 51bfff6873SLukas Czerner 523dcf5451SChristoph Hellwig #include "ext4.h" 534a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 543dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 55ac27a0ecSDave Kleikamp #include "xattr.h" 56ac27a0ecSDave Kleikamp #include "acl.h" 573661d286STheodore Ts'o #include "mballoc.h" 580c9ec4beSDarrick J. Wong #include "fsmap.h" 59ac27a0ecSDave Kleikamp 609bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 619bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 629bffad1eSTheodore Ts'o 630b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6459ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 65e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 669f6200bbSTheodore Ts'o 67617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 68ac27a0ecSDave Kleikamp unsigned long journal_devnum); 692adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 702d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 714392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 7411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 75617ba13bSMingming Cao struct ext4_super_block *es); 76617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 77617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 78c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 79c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 88b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 89e6e268cbSLukas Czerner struct super_block *sb); 9085456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9102f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 92cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 93cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 94cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 95cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 961489dffdSChristoph Hellwig static void ext4_kill_sb(struct super_block *sb); 97cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 98ac27a0ecSDave Kleikamp 99e74031fdSJan Kara /* 100e74031fdSJan Kara * Lock ordering 101e74031fdSJan Kara * 102e74031fdSJan Kara * page fault path: 103d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 104d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 105e74031fdSJan Kara * 106e74031fdSJan Kara * buffered write path: 107c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 108e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 109e74031fdSJan Kara * i_data_sem (rw) 110e74031fdSJan Kara * 111e74031fdSJan Kara * truncate: 112d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 113d4f5258eSJan Kara * page lock 114d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1151d39834fSNikolay Borisov * i_data_sem (rw) 116e74031fdSJan Kara * 117e74031fdSJan Kara * direct IO: 118c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1191d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 120e74031fdSJan Kara * 121e74031fdSJan Kara * writepages: 122e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 123e74031fdSJan Kara */ 124e74031fdSJan Kara 12502f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12602f960f8SLukas Czerner .parse_param = ext4_parse_param, 127cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 128cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 129cebe85d5SLukas Czerner .free = ext4_fc_free, 13002f960f8SLukas Czerner }; 13102f960f8SLukas Czerner 13202f960f8SLukas Czerner 133c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1342035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1352035e776STheodore Ts'o .owner = THIS_MODULE, 1362035e776STheodore Ts'o .name = "ext2", 137cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 138cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1391489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 1402035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1412035e776STheodore Ts'o }; 1427f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 143fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1444b41828bSChristoph Hellwig #define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type) 1452035e776STheodore Ts'o #else 1462035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1472035e776STheodore Ts'o #endif 1482035e776STheodore Ts'o 1492035e776STheodore Ts'o 150ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 151ba69f9abSJan Kara .owner = THIS_MODULE, 152ba69f9abSJan Kara .name = "ext3", 153cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 154cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1551489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 156ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 157ba69f9abSJan Kara }; 1587f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 159fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 1604b41828bSChristoph Hellwig #define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type) 161bd81d8eeSLaurent Vivier 162fa491b14Szhangyi (F) 16367c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 164fa491b14Szhangyi (F) bh_end_io_t *end_io) 165fa491b14Szhangyi (F) { 166fb265c9cSTheodore Ts'o /* 167fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 168fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 169fa491b14Szhangyi (F) * recheck the buffer contents. 170fa491b14Szhangyi (F) */ 171fa491b14Szhangyi (F) clear_buffer_verified(bh); 172fa491b14Szhangyi (F) 173fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 174fa491b14Szhangyi (F) get_bh(bh); 1751420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 176fa491b14Szhangyi (F) } 177fa491b14Szhangyi (F) 17867c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 179fa491b14Szhangyi (F) bh_end_io_t *end_io) 180fa491b14Szhangyi (F) { 181fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 182fa491b14Szhangyi (F) 183fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 184fa491b14Szhangyi (F) unlock_buffer(bh); 185fa491b14Szhangyi (F) return; 186fa491b14Szhangyi (F) } 187fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 188fa491b14Szhangyi (F) } 189fa491b14Szhangyi (F) 19067c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) 191fa491b14Szhangyi (F) { 192fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 193fa491b14Szhangyi (F) 194fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 195fa491b14Szhangyi (F) unlock_buffer(bh); 196fa491b14Szhangyi (F) return 0; 197fa491b14Szhangyi (F) } 198fa491b14Szhangyi (F) 199fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 200fa491b14Szhangyi (F) 201fa491b14Szhangyi (F) wait_on_buffer(bh); 202fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 203fa491b14Szhangyi (F) return 0; 204fa491b14Szhangyi (F) return -EIO; 205fa491b14Szhangyi (F) } 206fa491b14Szhangyi (F) 20767c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) 208fa491b14Szhangyi (F) { 2090b73284cSZhang Yi lock_buffer(bh); 2100b73284cSZhang Yi if (!wait) { 211fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 212fa491b14Szhangyi (F) return 0; 213fa491b14Szhangyi (F) } 2140b73284cSZhang Yi return ext4_read_bh(bh, op_flags, NULL); 215fa491b14Szhangyi (F) } 216fa491b14Szhangyi (F) 217fb265c9cSTheodore Ts'o /* 2188394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 219fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 220fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 221fb265c9cSTheodore Ts'o * return. 222fb265c9cSTheodore Ts'o */ 2238394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 22467c0f556SBart Van Assche sector_t block, 22567c0f556SBart Van Assche blk_opf_t op_flags, gfp_t gfp) 226fb265c9cSTheodore Ts'o { 2272d069c08Szhangyi (F) struct buffer_head *bh; 2282d069c08Szhangyi (F) int ret; 229fb265c9cSTheodore Ts'o 2308394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 231fb265c9cSTheodore Ts'o if (bh == NULL) 232fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 233cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 234fb265c9cSTheodore Ts'o return bh; 2352d069c08Szhangyi (F) 2362d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2372d069c08Szhangyi (F) if (ret) { 238fb265c9cSTheodore Ts'o put_bh(bh); 2392d069c08Szhangyi (F) return ERR_PTR(ret); 2402d069c08Szhangyi (F) } 2412d069c08Szhangyi (F) return bh; 242fb265c9cSTheodore Ts'o } 243fb265c9cSTheodore Ts'o 2448394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 24567c0f556SBart Van Assche blk_opf_t op_flags) 2468394a6abSzhangyi (F) { 247*224941e8SAl Viro gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping, 2488a83ac54SMatthew Wilcox (Oracle) ~__GFP_FS) | __GFP_MOVABLE; 2498a83ac54SMatthew Wilcox (Oracle) 2508a83ac54SMatthew Wilcox (Oracle) return __ext4_sb_bread_gfp(sb, block, op_flags, gfp); 2518394a6abSzhangyi (F) } 2528394a6abSzhangyi (F) 2538394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2548394a6abSzhangyi (F) sector_t block) 2558394a6abSzhangyi (F) { 256*224941e8SAl Viro gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping, 2578a83ac54SMatthew Wilcox (Oracle) ~__GFP_FS); 2588a83ac54SMatthew Wilcox (Oracle) 2598a83ac54SMatthew Wilcox (Oracle) return __ext4_sb_bread_gfp(sb, block, 0, gfp); 2608394a6abSzhangyi (F) } 2618394a6abSzhangyi (F) 2625df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2635df1d412Szhangyi (F) { 264e509ad4dSMatthew Wilcox (Oracle) struct buffer_head *bh = bdev_getblk(sb->s_bdev, block, 2651cbf0a58SHugh Dickins sb->s_blocksize, GFP_NOWAIT | __GFP_NOWARN); 2665df1d412Szhangyi (F) 2675df1d412Szhangyi (F) if (likely(bh)) { 2680b73284cSZhang Yi if (trylock_buffer(bh)) 2690b73284cSZhang Yi ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL); 2705df1d412Szhangyi (F) brelse(bh); 2715df1d412Szhangyi (F) } 272c197855eSStephen Hemminger } 273a9c47317SDarrick J. Wong 274a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2759aa5d32bSDmitry Monakhov struct ext4_super_block *es) 276a9c47317SDarrick J. Wong { 277a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 278a9c47317SDarrick J. Wong return 1; 279a9c47317SDarrick J. Wong 280a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 28106db49e6STheodore Ts'o } 282a9c47317SDarrick J. Wong 283bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 284a9c47317SDarrick J. Wong struct ext4_super_block *es) 285a9c47317SDarrick J. Wong { 286a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 287a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 288a9c47317SDarrick J. Wong __u32 csum; 289a9c47317SDarrick J. Wong 290a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 291a9c47317SDarrick J. Wong 292a9c47317SDarrick J. Wong return cpu_to_le32(csum); 293a9c47317SDarrick J. Wong } 294a9c47317SDarrick J. Wong 295a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 296a9c47317SDarrick J. Wong struct ext4_super_block *es) 297a9c47317SDarrick J. Wong { 298a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 299a9c47317SDarrick J. Wong return 1; 300a9c47317SDarrick J. Wong 301a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 302a9c47317SDarrick J. Wong } 303a9c47317SDarrick J. Wong 304a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 305a9c47317SDarrick J. Wong { 30606db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 30706db49e6STheodore Ts'o 3089aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 309a9c47317SDarrick J. Wong return; 310a9c47317SDarrick J. Wong 311a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 312a9c47317SDarrick J. Wong } 313a9c47317SDarrick J. Wong 3148fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3158fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 316bd81d8eeSLaurent Vivier { 3173a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3188fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3198fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 320bd81d8eeSLaurent Vivier } 321bd81d8eeSLaurent Vivier 3228fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3238fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 324bd81d8eeSLaurent Vivier { 3255272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3268fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3278fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 328bd81d8eeSLaurent Vivier } 329bd81d8eeSLaurent Vivier 3308fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3318fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 332bd81d8eeSLaurent Vivier { 3335272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3348fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3358fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 336bd81d8eeSLaurent Vivier } 337bd81d8eeSLaurent Vivier 338021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(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_blocks_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_blocks_count_hi) << 16 : 0); 344560671a0SAneesh Kumar K.V } 345560671a0SAneesh Kumar K.V 346560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_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_free_inodes_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_free_inodes_count_hi) << 16 : 0); 352560671a0SAneesh Kumar K.V } 353560671a0SAneesh Kumar K.V 354560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_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_used_dirs_count_lo) | 358560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 359560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 360560671a0SAneesh Kumar K.V } 361560671a0SAneesh Kumar K.V 362560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 363560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 364560671a0SAneesh Kumar K.V { 365560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 366560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 367560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 368560671a0SAneesh Kumar K.V } 369560671a0SAneesh Kumar K.V 3708fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3718fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 372bd81d8eeSLaurent Vivier { 3733a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3748fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3758fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 376bd81d8eeSLaurent Vivier } 377bd81d8eeSLaurent Vivier 3788fadc143SAlexandre Ratchov void ext4_inode_bitmap_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_bitmap_lo = cpu_to_le32((u32)blk); 3828fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3838fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 384bd81d8eeSLaurent Vivier } 385bd81d8eeSLaurent Vivier 3868fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3878fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 388bd81d8eeSLaurent Vivier { 3895272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3908fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3918fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 392bd81d8eeSLaurent Vivier } 393bd81d8eeSLaurent Vivier 394021b65bbSTheodore Ts'o void ext4_free_group_clusters_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_blocks_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_blocks_count_hi = cpu_to_le16(count >> 16); 400560671a0SAneesh Kumar K.V } 401560671a0SAneesh Kumar K.V 402560671a0SAneesh Kumar K.V void ext4_free_inodes_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_free_inodes_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_free_inodes_count_hi = cpu_to_le16(count >> 16); 408560671a0SAneesh Kumar K.V } 409560671a0SAneesh Kumar K.V 410560671a0SAneesh Kumar K.V void ext4_used_dirs_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_used_dirs_count_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_used_dirs_count_hi = cpu_to_le16(count >> 16); 416560671a0SAneesh Kumar K.V } 417560671a0SAneesh Kumar K.V 418560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 419560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 420560671a0SAneesh Kumar K.V { 421560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 422560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 423560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 424560671a0SAneesh Kumar K.V } 425560671a0SAneesh Kumar K.V 426c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4276a0678a7SArnd Bergmann { 4286a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4296a0678a7SArnd Bergmann 4306a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4316a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4326a0678a7SArnd Bergmann } 4336a0678a7SArnd Bergmann 4346a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4356a0678a7SArnd Bergmann { 4366a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4376a0678a7SArnd Bergmann } 4386a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 439c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 440c92dc856SJan Kara ktime_get_real_seconds()) 4416a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4426a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 443d3d1faf6SCurt Wohlgemuth 444ff0722deSVitaliy Kuznetsov #define EXT4_SB_REFRESH_INTERVAL_SEC (3600) /* seconds (1 hour) */ 445ff0722deSVitaliy Kuznetsov #define EXT4_SB_REFRESH_INTERVAL_KB (16384) /* kilobytes (16MB) */ 446ff0722deSVitaliy Kuznetsov 447ff0722deSVitaliy Kuznetsov /* 448ff0722deSVitaliy Kuznetsov * The ext4_maybe_update_superblock() function checks and updates the 449ff0722deSVitaliy Kuznetsov * superblock if needed. 450ff0722deSVitaliy Kuznetsov * 451ff0722deSVitaliy Kuznetsov * This function is designed to update the on-disk superblock only under 452ff0722deSVitaliy Kuznetsov * certain conditions to prevent excessive disk writes and unnecessary 453ff0722deSVitaliy Kuznetsov * waking of the disk from sleep. The superblock will be updated if: 454ff0722deSVitaliy Kuznetsov * 1. More than an hour has passed since the last superblock update, and 455ff0722deSVitaliy Kuznetsov * 2. More than 16MB have been written since the last superblock update. 456ff0722deSVitaliy Kuznetsov * 457ff0722deSVitaliy Kuznetsov * @sb: The superblock 458ff0722deSVitaliy Kuznetsov */ 459ff0722deSVitaliy Kuznetsov static void ext4_maybe_update_superblock(struct super_block *sb) 460ff0722deSVitaliy Kuznetsov { 461ff0722deSVitaliy Kuznetsov struct ext4_sb_info *sbi = EXT4_SB(sb); 462ff0722deSVitaliy Kuznetsov struct ext4_super_block *es = sbi->s_es; 463ff0722deSVitaliy Kuznetsov journal_t *journal = sbi->s_journal; 464ff0722deSVitaliy Kuznetsov time64_t now; 465ff0722deSVitaliy Kuznetsov __u64 last_update; 466ff0722deSVitaliy Kuznetsov __u64 lifetime_write_kbytes; 467ff0722deSVitaliy Kuznetsov __u64 diff_size; 468ff0722deSVitaliy Kuznetsov 469ff0722deSVitaliy Kuznetsov if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) || 470ff0722deSVitaliy Kuznetsov !journal || (journal->j_flags & JBD2_UNMOUNT)) 471ff0722deSVitaliy Kuznetsov return; 472ff0722deSVitaliy Kuznetsov 473ff0722deSVitaliy Kuznetsov now = ktime_get_real_seconds(); 474ff0722deSVitaliy Kuznetsov last_update = ext4_get_tstamp(es, s_wtime); 475ff0722deSVitaliy Kuznetsov 476ff0722deSVitaliy Kuznetsov if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC)) 477ff0722deSVitaliy Kuznetsov return; 478ff0722deSVitaliy Kuznetsov 479ff0722deSVitaliy Kuznetsov lifetime_write_kbytes = sbi->s_kbytes_written + 480ff0722deSVitaliy Kuznetsov ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 481ff0722deSVitaliy Kuznetsov sbi->s_sectors_written_start) >> 1); 482ff0722deSVitaliy Kuznetsov 483ff0722deSVitaliy Kuznetsov /* Get the number of kilobytes not written to disk to account 484ff0722deSVitaliy Kuznetsov * for statistics and compare with a multiple of 16 MB. This 485ff0722deSVitaliy Kuznetsov * is used to determine when the next superblock commit should 486ff0722deSVitaliy Kuznetsov * occur (i.e. not more often than once per 16MB if there was 487ff0722deSVitaliy Kuznetsov * less written in an hour). 488ff0722deSVitaliy Kuznetsov */ 489ff0722deSVitaliy Kuznetsov diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written); 490ff0722deSVitaliy Kuznetsov 491ff0722deSVitaliy Kuznetsov if (diff_size > EXT4_SB_REFRESH_INTERVAL_KB) 492bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 493ff0722deSVitaliy Kuznetsov } 494ff0722deSVitaliy Kuznetsov 49518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 49618aadd47SBobi Jam { 49718aadd47SBobi Jam struct super_block *sb = journal->j_private; 49818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 49918aadd47SBobi Jam int error = is_journal_aborted(journal); 5005d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 50118aadd47SBobi Jam 5025d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 503a0154344SDaeho Jeong 504a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 505ff0722deSVitaliy Kuznetsov ext4_maybe_update_superblock(sb); 506a0154344SDaeho Jeong 50718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 5085d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 5095d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 5105d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 51118aadd47SBobi Jam list_del_init(&jce->jce_list); 51218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 51318aadd47SBobi Jam jce->jce_func(sb, jce, error); 51418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 51518aadd47SBobi Jam } 51618aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 51718aadd47SBobi Jam } 5181c13d5c0STheodore Ts'o 519afb585a9SMauricio Faria de Oliveira /* 520afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 521afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 522afb585a9SMauricio Faria de Oliveira * 523afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 524afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 525afb585a9SMauricio Faria de Oliveira * to write protect the pages. 526afb585a9SMauricio Faria de Oliveira * 527afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 528afb585a9SMauricio Faria de Oliveira */ 529d585bdbeSMatthew Wilcox (Oracle) static int ext4_journalled_writepage_callback(struct folio *folio, 530afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 531afb585a9SMauricio Faria de Oliveira void *data) 532afb585a9SMauricio Faria de Oliveira { 533afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 534afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 535afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 536afb585a9SMauricio Faria de Oliveira 537d585bdbeSMatthew Wilcox (Oracle) bh = head = folio_buffers(folio); 538afb585a9SMauricio Faria de Oliveira do { 539afb585a9SMauricio Faria de Oliveira /* 540afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 541afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 542afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 543afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 544afb585a9SMauricio Faria de Oliveira * properly. 545afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 546afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 547afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 548afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 549afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 550afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 551afb585a9SMauricio Faria de Oliveira */ 552afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 553afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 554afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 555afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 556d585bdbeSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 557afb585a9SMauricio Faria de Oliveira goto out; 558afb585a9SMauricio Faria de Oliveira } 559afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 560afb585a9SMauricio Faria de Oliveira 561afb585a9SMauricio Faria de Oliveira out: 562afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 563afb585a9SMauricio Faria de Oliveira } 564afb585a9SMauricio Faria de Oliveira 565afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 566afb585a9SMauricio Faria de Oliveira { 567afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 568afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 569afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 570afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 571afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 572afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 573afb585a9SMauricio Faria de Oliveira }; 574afb585a9SMauricio Faria de Oliveira 575afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 576afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 577afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 578afb585a9SMauricio Faria de Oliveira } 579afb585a9SMauricio Faria de Oliveira 580afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 581afb585a9SMauricio Faria de Oliveira { 582afb585a9SMauricio Faria de Oliveira int ret; 583afb585a9SMauricio Faria de Oliveira 584afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 585afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 586afb585a9SMauricio Faria de Oliveira else 58759205c8dSJan Kara ret = ext4_normal_submit_inode_data_buffers(jinode); 588afb585a9SMauricio Faria de Oliveira return ret; 589afb585a9SMauricio Faria de Oliveira } 590afb585a9SMauricio Faria de Oliveira 591afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 592afb585a9SMauricio Faria de Oliveira { 593afb585a9SMauricio Faria de Oliveira int ret = 0; 594afb585a9SMauricio Faria de Oliveira 595afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 596afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 597afb585a9SMauricio Faria de Oliveira 598afb585a9SMauricio Faria de Oliveira return ret; 599afb585a9SMauricio Faria de Oliveira } 600afb585a9SMauricio Faria de Oliveira 6011dc1097fSJan Kara static bool system_going_down(void) 6021dc1097fSJan Kara { 6031dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 6041dc1097fSJan Kara || system_state == SYSTEM_RESTART; 6051dc1097fSJan Kara } 6061dc1097fSJan Kara 60702a7780eSJan Kara struct ext4_err_translation { 60802a7780eSJan Kara int code; 60902a7780eSJan Kara int errno; 61002a7780eSJan Kara }; 61102a7780eSJan Kara 61202a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 61302a7780eSJan Kara 61402a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 61502a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 61602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 61702a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 61802a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 61902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 62002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 62102a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 62202a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 62302a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 62402a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 62502a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 62602a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 62702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 62802a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 62902a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 63002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 63102a7780eSJan Kara }; 63202a7780eSJan Kara 63302a7780eSJan Kara static int ext4_errno_to_code(int errno) 63402a7780eSJan Kara { 63502a7780eSJan Kara int i; 63602a7780eSJan Kara 63702a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 63802a7780eSJan Kara if (err_translation[i].errno == errno) 63902a7780eSJan Kara return err_translation[i].code; 64002a7780eSJan Kara return EXT4_ERR_UNKNOWN; 64102a7780eSJan Kara } 64202a7780eSJan Kara 6432d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 64440676623SJan Kara __u32 ino, __u64 block, 64540676623SJan Kara const char *func, unsigned int line) 64640676623SJan Kara { 647c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 64840676623SJan Kara 64902a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 65002a7780eSJan Kara if (error == 0) 65102a7780eSJan Kara error = EFSCORRUPTED; 652c92dc856SJan Kara 653c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 654c92dc856SJan Kara sbi->s_add_error_count++; 655c92dc856SJan Kara sbi->s_last_error_code = error; 656c92dc856SJan Kara sbi->s_last_error_line = line; 657c92dc856SJan Kara sbi->s_last_error_ino = ino; 658c92dc856SJan Kara sbi->s_last_error_block = block; 659c92dc856SJan Kara sbi->s_last_error_func = func; 660c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 661c92dc856SJan Kara if (!sbi->s_first_error_time) { 662c92dc856SJan Kara sbi->s_first_error_code = error; 663c92dc856SJan Kara sbi->s_first_error_line = line; 664c92dc856SJan Kara sbi->s_first_error_ino = ino; 665c92dc856SJan Kara sbi->s_first_error_block = block; 666c92dc856SJan Kara sbi->s_first_error_func = func; 667c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 66840676623SJan Kara } 669c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 67040676623SJan Kara } 67140676623SJan Kara 672ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 673ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 674ac27a0ecSDave Kleikamp * 675ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 676617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 677ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 678ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 679ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 680ac27a0ecSDave Kleikamp * write out the superblock safely. 681ac27a0ecSDave Kleikamp * 682dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 683d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 684ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 685014c9caaSJan Kara * 686014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 687014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 688014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 689014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 690014c9caaSJan Kara * at a critical moment in log management. 691ac27a0ecSDave Kleikamp */ 692e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 693e789ca0cSJan Kara __u32 ino, __u64 block, 694e789ca0cSJan Kara const char *func, unsigned int line) 695ac27a0ecSDave Kleikamp { 696b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6972d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 698b08070ecSJan Kara 699e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 700327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 701327eaf73STheodore Ts'o WARN_ON_ONCE(1); 702327eaf73STheodore Ts'o 7032d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 70495257987SJan Kara set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags); 705ac27a0ecSDave Kleikamp if (journal) 706dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 7072d01ddc8SJan Kara } 7082d01ddc8SJan Kara 7092d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 7102d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 7112d01ddc8SJan Kara /* 7122d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 7132d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 7142d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 7152d01ddc8SJan Kara * defer superblock flushing to a workqueue. 7162d01ddc8SJan Kara */ 717bb9464e0Syangerkun if (continue_fs && journal) 718bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 7192d01ddc8SJan Kara else 7202d01ddc8SJan Kara ext4_commit_super(sb); 7212d01ddc8SJan Kara } 7222d01ddc8SJan Kara 7231dc1097fSJan Kara /* 7241dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 7251dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 7261dc1097fSJan Kara * disabled. 7271dc1097fSJan Kara */ 728014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 729617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 730ac27a0ecSDave Kleikamp sb->s_id); 731ac27a0ecSDave Kleikamp } 732ac2f7ca5SYe Bin 733ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 734ac2f7ca5SYe Bin return; 735ac2f7ca5SYe Bin 736014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 737014c9caaSJan Kara /* 738014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 739014c9caaSJan Kara * ->s_flags update 740014c9caaSJan Kara */ 741014c9caaSJan Kara smp_wmb(); 742014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7434327ba52SDaeho Jeong } 744ac27a0ecSDave Kleikamp 745bb15cea2STheodore Ts'o static void update_super_work(struct work_struct *work) 746c92dc856SJan Kara { 747c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 748bb15cea2STheodore Ts'o s_sb_upd_work); 7492d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7502d01ddc8SJan Kara handle_t *handle; 751c92dc856SJan Kara 7522d01ddc8SJan Kara /* 7532d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7542d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7552d01ddc8SJan Kara * updates. 7562d01ddc8SJan Kara * 7572d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7582d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7592d01ddc8SJan Kara */ 7602d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 761558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 762ee6a12d0STheodore Ts'o bool call_notify_err = false; 763ee6a12d0STheodore Ts'o 7642d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7652d01ddc8SJan Kara if (IS_ERR(handle)) 7662d01ddc8SJan Kara goto write_directly; 767558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7682d01ddc8SJan Kara jbd2_journal_stop(handle); 7692d01ddc8SJan Kara goto write_directly; 7702d01ddc8SJan Kara } 771ff0722deSVitaliy Kuznetsov 772ff0722deSVitaliy Kuznetsov if (sbi->s_add_error_count > 0) 773ff0722deSVitaliy Kuznetsov call_notify_err = true; 774ff0722deSVitaliy Kuznetsov 7752d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 776558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 777558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 778558d6450SYe Bin "superblock detected"); 779558d6450SYe Bin clear_buffer_write_io_error(sbh); 780558d6450SYe Bin set_buffer_uptodate(sbh); 781558d6450SYe Bin } 782558d6450SYe Bin 783558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7842d01ddc8SJan Kara jbd2_journal_stop(handle); 7852d01ddc8SJan Kara goto write_directly; 7862d01ddc8SJan Kara } 7872d01ddc8SJan Kara jbd2_journal_stop(handle); 788ff0722deSVitaliy Kuznetsov 789ff0722deSVitaliy Kuznetsov if (call_notify_err) 790d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 791ff0722deSVitaliy Kuznetsov 7922d01ddc8SJan Kara return; 7932d01ddc8SJan Kara } 7942d01ddc8SJan Kara write_directly: 7952d01ddc8SJan Kara /* 7962d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7972d01ddc8SJan Kara * out and hope for the best. 7982d01ddc8SJan Kara */ 7994392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 800d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 801ac27a0ecSDave Kleikamp } 802ac27a0ecSDave Kleikamp 803efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 804efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 805efbed4dcSTheodore Ts'o "EXT4-fs error") 806efbed4dcSTheodore Ts'o 80712062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 808014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 80954d3adbcSTheodore Ts'o const char *fmt, ...) 810ac27a0ecSDave Kleikamp { 8110ff2ea7dSJoe Perches struct va_format vaf; 812ac27a0ecSDave Kleikamp va_list args; 813ac27a0ecSDave Kleikamp 814eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 8150db1ff22STheodore Ts'o return; 8160db1ff22STheodore Ts'o 817ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 818efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 819ac27a0ecSDave Kleikamp va_start(args, fmt); 8200ff2ea7dSJoe Perches vaf.fmt = fmt; 8210ff2ea7dSJoe Perches vaf.va = &args; 822efbed4dcSTheodore Ts'o printk(KERN_CRIT 823efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 8240ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 825ac27a0ecSDave Kleikamp va_end(args); 826efbed4dcSTheodore Ts'o } 8279a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 8289a089b21SGabriel Krisman Bertazi 829e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 830ac27a0ecSDave Kleikamp } 831ac27a0ecSDave Kleikamp 832e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 83354d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 834273df556SFrank Mayhar const char *fmt, ...) 835273df556SFrank Mayhar { 836273df556SFrank Mayhar va_list args; 837f7c21177STheodore Ts'o struct va_format vaf; 838273df556SFrank Mayhar 839eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(inode->i_sb))) 8400db1ff22STheodore Ts'o return; 8410db1ff22STheodore Ts'o 842ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 843efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 844273df556SFrank Mayhar va_start(args, fmt); 845f7c21177STheodore Ts'o vaf.fmt = fmt; 846f7c21177STheodore Ts'o vaf.va = &args; 847c398eda0STheodore Ts'o if (block) 848d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 849d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 850d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 851d9ee81daSJoe Perches block, current->comm, &vaf); 852d9ee81daSJoe Perches else 853d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 854d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 855d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 856d9ee81daSJoe Perches current->comm, &vaf); 857273df556SFrank Mayhar va_end(args); 858efbed4dcSTheodore Ts'o } 8599a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8609a089b21SGabriel Krisman Bertazi 861e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 86254d3adbcSTheodore Ts'o function, line); 863273df556SFrank Mayhar } 864273df556SFrank Mayhar 865e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 866f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 867f7c21177STheodore Ts'o const char *fmt, ...) 868273df556SFrank Mayhar { 869273df556SFrank Mayhar va_list args; 870f7c21177STheodore Ts'o struct va_format vaf; 871496ad9aaSAl Viro struct inode *inode = file_inode(file); 872273df556SFrank Mayhar char pathname[80], *path; 873273df556SFrank Mayhar 874eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(inode->i_sb))) 8750db1ff22STheodore Ts'o return; 8760db1ff22STheodore Ts'o 877ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 878efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8799bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 880f9a62d09SDan Carpenter if (IS_ERR(path)) 881273df556SFrank Mayhar path = "(unknown)"; 882f7c21177STheodore Ts'o va_start(args, fmt); 883f7c21177STheodore Ts'o vaf.fmt = fmt; 884f7c21177STheodore Ts'o vaf.va = &args; 885d9ee81daSJoe Perches if (block) 886d9ee81daSJoe Perches printk(KERN_CRIT 887d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 888d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 889d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 890d9ee81daSJoe Perches block, current->comm, path, &vaf); 891d9ee81daSJoe Perches else 892d9ee81daSJoe Perches printk(KERN_CRIT 893d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 894d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 895d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 896d9ee81daSJoe Perches current->comm, path, &vaf); 897273df556SFrank Mayhar va_end(args); 898efbed4dcSTheodore Ts'o } 8999a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 9009a089b21SGabriel Krisman Bertazi 901e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 90254d3adbcSTheodore Ts'o function, line); 903273df556SFrank Mayhar } 904273df556SFrank Mayhar 905722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 906ac27a0ecSDave Kleikamp char nbuf[16]) 907ac27a0ecSDave Kleikamp { 908ac27a0ecSDave Kleikamp char *errstr = NULL; 909ac27a0ecSDave Kleikamp 910ac27a0ecSDave Kleikamp switch (errno) { 9116a797d27SDarrick J. Wong case -EFSCORRUPTED: 9126a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 9136a797d27SDarrick J. Wong break; 9146a797d27SDarrick J. Wong case -EFSBADCRC: 9156a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 9166a797d27SDarrick J. Wong break; 917ac27a0ecSDave Kleikamp case -EIO: 918ac27a0ecSDave Kleikamp errstr = "IO failure"; 919ac27a0ecSDave Kleikamp break; 920ac27a0ecSDave Kleikamp case -ENOMEM: 921ac27a0ecSDave Kleikamp errstr = "Out of memory"; 922ac27a0ecSDave Kleikamp break; 923ac27a0ecSDave Kleikamp case -EROFS: 92478f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 92578f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 926ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 927ac27a0ecSDave Kleikamp else 928ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 929ac27a0ecSDave Kleikamp break; 930ac27a0ecSDave Kleikamp default: 931ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 932ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 933ac27a0ecSDave Kleikamp * NULL. */ 934ac27a0ecSDave Kleikamp if (nbuf) { 935ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 936ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 937ac27a0ecSDave Kleikamp errstr = nbuf; 938ac27a0ecSDave Kleikamp } 939ac27a0ecSDave Kleikamp break; 940ac27a0ecSDave Kleikamp } 941ac27a0ecSDave Kleikamp 942ac27a0ecSDave Kleikamp return errstr; 943ac27a0ecSDave Kleikamp } 944ac27a0ecSDave Kleikamp 945617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 946ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 947ac27a0ecSDave Kleikamp 948c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 949c398eda0STheodore Ts'o unsigned int line, int errno) 950ac27a0ecSDave Kleikamp { 951ac27a0ecSDave Kleikamp char nbuf[16]; 952ac27a0ecSDave Kleikamp const char *errstr; 953ac27a0ecSDave Kleikamp 954eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 9550db1ff22STheodore Ts'o return; 9560db1ff22STheodore Ts'o 957ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 958ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 959ac27a0ecSDave Kleikamp * an error. */ 960bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 961ac27a0ecSDave Kleikamp return; 962ac27a0ecSDave Kleikamp 963efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 964617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 965c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 966c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 967efbed4dcSTheodore Ts'o } 9689a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 969ac27a0ecSDave Kleikamp 970e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 971ac27a0ecSDave Kleikamp } 972ac27a0ecSDave Kleikamp 973e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 974e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 975b31e1552SEric Sandeen { 9760ff2ea7dSJoe Perches struct va_format vaf; 977b31e1552SEric Sandeen va_list args; 978b31e1552SEric Sandeen 979da812f61SLukas Czerner if (sb) { 9801cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 981da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 982da812f61SLukas Czerner "EXT4-fs")) 983efbed4dcSTheodore Ts'o return; 984da812f61SLukas Czerner } 985efbed4dcSTheodore Ts'o 986b31e1552SEric Sandeen va_start(args, fmt); 9870ff2ea7dSJoe Perches vaf.fmt = fmt; 9880ff2ea7dSJoe Perches vaf.va = &args; 989da812f61SLukas Czerner if (sb) 9900ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 991da812f61SLukas Czerner else 992da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 993b31e1552SEric Sandeen va_end(args); 994b31e1552SEric Sandeen } 995b31e1552SEric Sandeen 9961cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9971cf006edSDmitry Monakhov { 9981cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9991cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 10001cf006edSDmitry Monakhov "EXT4-fs warning"); 10011cf006edSDmitry Monakhov } 1002b03a2f7eSAndreas Dilger 100312062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 1004c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 1005ac27a0ecSDave Kleikamp { 10060ff2ea7dSJoe Perches struct va_format vaf; 1007ac27a0ecSDave Kleikamp va_list args; 1008ac27a0ecSDave Kleikamp 1009b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 1010efbed4dcSTheodore Ts'o return; 1011efbed4dcSTheodore Ts'o 1012ac27a0ecSDave Kleikamp va_start(args, fmt); 10130ff2ea7dSJoe Perches vaf.fmt = fmt; 10140ff2ea7dSJoe Perches vaf.va = &args; 10150ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 10160ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 1017ac27a0ecSDave Kleikamp va_end(args); 1018ac27a0ecSDave Kleikamp } 1019ac27a0ecSDave Kleikamp 1020b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 1021b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 1022b03a2f7eSAndreas Dilger { 1023b03a2f7eSAndreas Dilger struct va_format vaf; 1024b03a2f7eSAndreas Dilger va_list args; 1025b03a2f7eSAndreas Dilger 1026b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 1027b03a2f7eSAndreas Dilger return; 1028b03a2f7eSAndreas Dilger 1029b03a2f7eSAndreas Dilger va_start(args, fmt); 1030b03a2f7eSAndreas Dilger vaf.fmt = fmt; 1031b03a2f7eSAndreas Dilger vaf.va = &args; 1032b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 1033b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 1034b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 1035b03a2f7eSAndreas Dilger va_end(args); 1036b03a2f7eSAndreas Dilger } 1037b03a2f7eSAndreas Dilger 1038e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 1039e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 1040e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 1041e29136f8STheodore Ts'o const char *fmt, ...) 10425d1b1b3fSAneesh Kumar K.V __releases(bitlock) 10435d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 10445d1b1b3fSAneesh Kumar K.V { 10450ff2ea7dSJoe Perches struct va_format vaf; 10465d1b1b3fSAneesh Kumar K.V va_list args; 10475d1b1b3fSAneesh Kumar K.V 1048eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 10490db1ff22STheodore Ts'o return; 10500db1ff22STheodore Ts'o 1051ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1052efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10535d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10540ff2ea7dSJoe Perches vaf.fmt = fmt; 10550ff2ea7dSJoe Perches vaf.va = &args; 105621149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1057e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1058e29136f8STheodore Ts'o if (ino) 10590ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1060e29136f8STheodore Ts'o if (block) 1061efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1062efbed4dcSTheodore Ts'o (unsigned long long) block); 10630ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10645d1b1b3fSAneesh Kumar K.V va_end(args); 1065efbed4dcSTheodore Ts'o } 10665d1b1b3fSAneesh Kumar K.V 1067c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1068327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1069327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1070e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10712d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10722d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10732d01ddc8SJan Kara line); 1074bb15cea2STheodore Ts'o schedule_work(&EXT4_SB(sb)->s_sb_upd_work); 10752d01ddc8SJan Kara } 10765d1b1b3fSAneesh Kumar K.V return; 10775d1b1b3fSAneesh Kumar K.V } 10785d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1079e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10805d1b1b3fSAneesh Kumar K.V /* 10815d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10825d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10835d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10845d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10855d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 108625985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10875d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10885d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10895d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10905d1b1b3fSAneesh Kumar K.V */ 10915d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10925d1b1b3fSAneesh Kumar K.V return; 10935d1b1b3fSAneesh Kumar K.V } 10945d1b1b3fSAneesh Kumar K.V 1095db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1096db79e6d1SWang Shilong ext4_group_t group, 1097db79e6d1SWang Shilong unsigned int flags) 1098db79e6d1SWang Shilong { 1099db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1100db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1101db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 11029af0b3d1SWang Shilong int ret; 1103db79e6d1SWang Shilong 11045354b2afSTheodore Ts'o if (!grp || !gdp) 11055354b2afSTheodore Ts'o return; 11069af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 11079af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 11089af0b3d1SWang Shilong &grp->bb_state); 11099af0b3d1SWang Shilong if (!ret) 1110db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1111db79e6d1SWang Shilong grp->bb_free); 1112db79e6d1SWang Shilong } 1113db79e6d1SWang Shilong 11149af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 11159af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 11169af0b3d1SWang Shilong &grp->bb_state); 11179af0b3d1SWang Shilong if (!ret && gdp) { 1118db79e6d1SWang Shilong int count; 1119db79e6d1SWang Shilong 1120db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1121db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1122db79e6d1SWang Shilong count); 1123db79e6d1SWang Shilong } 1124db79e6d1SWang Shilong } 1125db79e6d1SWang Shilong } 1126db79e6d1SWang Shilong 1127617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1128ac27a0ecSDave Kleikamp { 1129617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1130ac27a0ecSDave Kleikamp 1131617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1132ac27a0ecSDave Kleikamp return; 1133ac27a0ecSDave Kleikamp 113412062dddSEric Sandeen ext4_warning(sb, 1135ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1136ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1137617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1138ac27a0ecSDave Kleikamp 1139617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1140617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1141617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1142ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1143ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1144ac27a0ecSDave Kleikamp 1145ac27a0ecSDave Kleikamp /* 1146ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1147ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1148ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1149ac27a0ecSDave Kleikamp */ 1150ac27a0ecSDave Kleikamp } 1151ac27a0ecSDave Kleikamp 1152ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1153ac27a0ecSDave Kleikamp { 1154617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1155ac27a0ecSDave Kleikamp } 1156ac27a0ecSDave Kleikamp 1157617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1158ac27a0ecSDave Kleikamp { 1159ac27a0ecSDave Kleikamp struct list_head *l; 1160ac27a0ecSDave Kleikamp 1161b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1162ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1163ac27a0ecSDave Kleikamp 1164ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1165ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1166ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1167ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1168ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1169ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1170ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1171ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1172ac27a0ecSDave Kleikamp } 1173ac27a0ecSDave Kleikamp } 1174ac27a0ecSDave Kleikamp 1175957153fcSJan Kara #ifdef CONFIG_QUOTA 1176957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1177957153fcSJan Kara 1178f3c1c42eSBaokun Li static inline void ext4_quotas_off(struct super_block *sb, int type) 1179957153fcSJan Kara { 1180f3c1c42eSBaokun Li BUG_ON(type > EXT4_MAXQUOTAS); 1181957153fcSJan Kara 1182957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1183f3c1c42eSBaokun Li for (type--; type >= 0; type--) 1184957153fcSJan Kara ext4_quota_off(sb, type); 1185957153fcSJan Kara } 118633458eabSTheodore Ts'o 118733458eabSTheodore Ts'o /* 118833458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 118933458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 119033458eabSTheodore Ts'o */ 119133458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 119233458eabSTheodore Ts'o struct ext4_sb_info *sbi, 119333458eabSTheodore Ts'o int type) 119433458eabSTheodore Ts'o { 119533458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 119633458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 119733458eabSTheodore Ts'o } 1198957153fcSJan Kara #else 1199f3c1c42eSBaokun Li static inline void ext4_quotas_off(struct super_block *sb, int type) 1200957153fcSJan Kara { 1201957153fcSJan Kara } 1202957153fcSJan Kara #endif 1203957153fcSJan Kara 12041f79467cSJason Yan static int ext4_percpu_param_init(struct ext4_sb_info *sbi) 12051f79467cSJason Yan { 12061f79467cSJason Yan ext4_fsblk_t block; 12071f79467cSJason Yan int err; 12081f79467cSJason Yan 12091f79467cSJason Yan block = ext4_count_free_clusters(sbi->s_sb); 12101f79467cSJason Yan ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); 12111f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 12121f79467cSJason Yan GFP_KERNEL); 12131f79467cSJason Yan if (!err) { 12141f79467cSJason Yan unsigned long freei = ext4_count_free_inodes(sbi->s_sb); 12151f79467cSJason Yan sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 12161f79467cSJason Yan err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 12171f79467cSJason Yan GFP_KERNEL); 12181f79467cSJason Yan } 12191f79467cSJason Yan if (!err) 12201f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirs_counter, 12211f79467cSJason Yan ext4_count_dirs(sbi->s_sb), GFP_KERNEL); 12221f79467cSJason Yan if (!err) 12231f79467cSJason Yan err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 12241f79467cSJason Yan GFP_KERNEL); 12251f79467cSJason Yan if (!err) 12261f79467cSJason Yan err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 12271f79467cSJason Yan GFP_KERNEL); 12281f79467cSJason Yan if (!err) 12291f79467cSJason Yan err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 12301f79467cSJason Yan 12311f79467cSJason Yan if (err) 12321f79467cSJason Yan ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory"); 12331f79467cSJason Yan 12341f79467cSJason Yan return err; 12351f79467cSJason Yan } 12361f79467cSJason Yan 12371f79467cSJason Yan static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi) 12381f79467cSJason Yan { 12391f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeclusters_counter); 12401f79467cSJason Yan percpu_counter_destroy(&sbi->s_freeinodes_counter); 12411f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirs_counter); 12421f79467cSJason Yan percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 12431f79467cSJason Yan percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 12441f79467cSJason Yan percpu_free_rwsem(&sbi->s_writepages_rwsem); 12451f79467cSJason Yan } 12461f79467cSJason Yan 12476ef68498SJason Yan static void ext4_group_desc_free(struct ext4_sb_info *sbi) 12486ef68498SJason Yan { 12496ef68498SJason Yan struct buffer_head **group_desc; 12506ef68498SJason Yan int i; 12516ef68498SJason Yan 12526ef68498SJason Yan rcu_read_lock(); 12536ef68498SJason Yan group_desc = rcu_dereference(sbi->s_group_desc); 12546ef68498SJason Yan for (i = 0; i < sbi->s_gdb_count; i++) 12556ef68498SJason Yan brelse(group_desc[i]); 12566ef68498SJason Yan kvfree(group_desc); 12576ef68498SJason Yan rcu_read_unlock(); 12586ef68498SJason Yan } 12596ef68498SJason Yan 1260dcbf8758SJason Yan static void ext4_flex_groups_free(struct ext4_sb_info *sbi) 1261dcbf8758SJason Yan { 1262dcbf8758SJason Yan struct flex_groups **flex_groups; 1263dcbf8758SJason Yan int i; 1264dcbf8758SJason Yan 1265dcbf8758SJason Yan rcu_read_lock(); 1266dcbf8758SJason Yan flex_groups = rcu_dereference(sbi->s_flex_groups); 1267dcbf8758SJason Yan if (flex_groups) { 1268dcbf8758SJason Yan for (i = 0; i < sbi->s_flex_groups_allocated; i++) 1269dcbf8758SJason Yan kvfree(flex_groups[i]); 1270dcbf8758SJason Yan kvfree(flex_groups); 1271dcbf8758SJason Yan } 1272dcbf8758SJason Yan rcu_read_unlock(); 1273dcbf8758SJason Yan } 1274dcbf8758SJason Yan 1275617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1276ac27a0ecSDave Kleikamp { 1277617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1278617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 127997abd7d4STheodore Ts'o int aborted = 0; 1280856dd6c5SNathan Chancellor int err; 1281ac27a0ecSDave Kleikamp 1282b98535d0SYe Bin /* 1283b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1284b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1285b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1286bb15cea2STheodore Ts'o * Unregister sysfs before flush sbi->s_sb_upd_work. 1287b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1288b98535d0SYe Bin * read metadata verify failed then will queue error work. 1289bb15cea2STheodore Ts'o * update_super_work will call start_this_handle may trigger 1290b98535d0SYe Bin * BUG_ON. 1291b98535d0SYe Bin */ 1292b98535d0SYe Bin ext4_unregister_sysfs(sb); 1293b98535d0SYe Bin 12944808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 1295bb0fbc78SLukas Czerner ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", 1296bb0fbc78SLukas Czerner &sb->s_uuid); 12974808cb5bSZhang Yi 1298857ac889SLukas Czerner ext4_unregister_li_request(sb); 1299f3c1c42eSBaokun Li ext4_quotas_off(sb, EXT4_MAXQUOTAS); 1300e0ccfd95SChristoph Hellwig 1301bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 13022e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 130302f310fcSJan Kara ext4_release_orphan_info(sb); 13044c0425ffSMingming Cao 13050390131bSFrank Mayhar if (sbi->s_journal) { 130697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1307ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 130847b4a50bSJan Kara sbi->s_journal = NULL; 1309878520acSTheodore Ts'o if ((err < 0) && !aborted) { 131054d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 13110390131bSFrank Mayhar } 1312878520acSTheodore Ts'o } 1313d4edac31SJosef Bacik 1314d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 1315292a089dSSteven Rostedt (Google) timer_shutdown_sync(&sbi->s_err_report); 1316d4edac31SJosef Bacik ext4_release_system_zone(sb); 1317d4edac31SJosef Bacik ext4_mb_release(sb); 1318d4edac31SJosef Bacik ext4_ext_release(sb); 1319d4edac31SJosef Bacik 1320bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1321e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 132202f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1323ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1324ac27a0ecSDave Kleikamp } 1325bc98a42cSDavid Howells if (!sb_rdonly(sb)) 13264392fbc4SJan Kara ext4_commit_super(sb); 1327a8e25a83SArtem Bityutskiy 13286ef68498SJason Yan ext4_group_desc_free(sbi); 1329dcbf8758SJason Yan ext4_flex_groups_free(sbi); 13301f79467cSJason Yan ext4_percpu_param_destroy(sbi); 1331ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1332856dd6c5SNathan Chancellor for (int i = 0; i < EXT4_MAXQUOTAS; i++) 133333458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1334ac27a0ecSDave Kleikamp #endif 1335ac27a0ecSDave Kleikamp 1336ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1337ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1338ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1339ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1340ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1341ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1342837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1343ac27a0ecSDave Kleikamp 134489d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1345f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 134661ead714SChristian Brauner if (sbi->s_journal_bdev_file) { 13471489dffdSChristoph Hellwig /* 13481489dffdSChristoph Hellwig * Invalidate the journal device's buffers. We don't want them 13491489dffdSChristoph Hellwig * floating about in memory - the physical journal device may 13501489dffdSChristoph Hellwig * hotswapped, and it breaks the `ro-after' testing code. 13511489dffdSChristoph Hellwig */ 135261ead714SChristian Brauner sync_blockdev(file_bdev(sbi->s_journal_bdev_file)); 135361ead714SChristian Brauner invalidate_bdev(file_bdev(sbi->s_journal_bdev_file)); 1354ac27a0ecSDave Kleikamp } 135550c15df6SChengguang Xu 1356dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1357dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 135850c15df6SChengguang Xu 135947387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 136047387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 136150c15df6SChengguang Xu 1362618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1363618f0031SPavel Skripkin 13649060dd2cSEric Sandeen brelse(sbi->s_sbh); 1365ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13663197ebdbSTheodore Ts'o /* 13673197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13683197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13693197ebdbSTheodore Ts'o */ 13703197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13713197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13720441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13730441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1374705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13758012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1376ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13775298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1378f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1379c83ad55eSGabriel Krisman Bertazi #endif 1380ac27a0ecSDave Kleikamp kfree(sbi); 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp 1383e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1384ac27a0ecSDave Kleikamp 1385ac27a0ecSDave Kleikamp /* 1386ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1387ac27a0ecSDave Kleikamp */ 1388617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1389ac27a0ecSDave Kleikamp { 1390617ba13bSMingming Cao struct ext4_inode_info *ei; 1391ac27a0ecSDave Kleikamp 1392fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1393ac27a0ecSDave Kleikamp if (!ei) 1394ac27a0ecSDave Kleikamp return NULL; 13950b8e58a1SAndreas Dilger 1396ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 13977ea71af9SYe Bin ei->i_flags = 0; 1398202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 139938727786SOjaswin Mujoo ei->i_prealloc_node = RB_ROOT; 140027bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 140138727786SOjaswin Mujoo rwlock_init(&ei->i_prealloc_lock); 14029a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 14039a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1404edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1405eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1406edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1407dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1408d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1409d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 14101dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1411a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1412a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 141396c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1414a9e7f447SDmitry Monakhov #endif 14158aefcd55STheodore Ts'o ei->jinode = NULL; 14162e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1417744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1418b436b9beSJan Kara ei->i_sync_tid = 0; 1419b436b9beSJan Kara ei->i_datasync_tid = 0; 1420e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 14212e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1422aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1423aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1424ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1425ac27a0ecSDave Kleikamp } 1426ac27a0ecSDave Kleikamp 14277ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 14287ff9c073STheodore Ts'o { 14297ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 14307ff9c073STheodore Ts'o 143129b3692eSEric Biggers if (!drop) 143229b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 143329b3692eSEric Biggers 14347ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 14357ff9c073STheodore Ts'o return drop; 14367ff9c073STheodore Ts'o } 14377ff9c073STheodore Ts'o 143894053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1439fa0d7e3dSNick Piggin { 14402c58d548SEric Biggers fscrypt_free_inode(inode); 1441aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1442aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1443aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1444aa75f4d3SHarshad Shirwadkar } 1445fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1446fa0d7e3dSNick Piggin } 1447fa0d7e3dSNick Piggin 1448617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1449ac27a0ecSDave Kleikamp { 14509f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1451b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1452b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1453b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 14549f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 14559f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 14569f7dd93dSVasily Averin true); 14579f7dd93dSVasily Averin dump_stack(); 14589f7dd93dSVasily Averin } 14596fed8395SJeffle Xu 14606fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 14616fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 14626fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 14636fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 14646fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1465ac27a0ecSDave Kleikamp } 1466ac27a0ecSDave Kleikamp 1467f5db130dSChristoph Hellwig static void ext4_shutdown(struct super_block *sb) 1468f5db130dSChristoph Hellwig { 1469f5db130dSChristoph Hellwig ext4_force_shutdown(sb, EXT4_GOING_FLAGS_NOLOGFLUSH); 1470f5db130dSChristoph Hellwig } 1471f5db130dSChristoph Hellwig 147251cc5068SAlexey Dobriyan static void init_once(void *foo) 1473ac27a0ecSDave Kleikamp { 1474c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1475ac27a0ecSDave Kleikamp 1476ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1477ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14780e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1479ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1480aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1481ac27a0ecSDave Kleikamp } 1482ac27a0ecSDave Kleikamp 1483e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1484ac27a0ecSDave Kleikamp { 1485f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1486f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1487f88c3fb8SLinus Torvalds SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT, 1488f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1489f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 149020c2df83SPaul Mundt init_once); 1491617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1492ac27a0ecSDave Kleikamp return -ENOMEM; 1493ac27a0ecSDave Kleikamp return 0; 1494ac27a0ecSDave Kleikamp } 1495ac27a0ecSDave Kleikamp 1496ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1497ac27a0ecSDave Kleikamp { 14988c0a8537SKirill A. Shutemov /* 14998c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 15008c0a8537SKirill A. Shutemov * destroy cache. 15018c0a8537SKirill A. Shutemov */ 15028c0a8537SKirill A. Shutemov rcu_barrier(); 1503617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1504ac27a0ecSDave Kleikamp } 1505ac27a0ecSDave Kleikamp 15060930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1507ac27a0ecSDave Kleikamp { 1508aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 15090930fcc1SAl Viro invalidate_inode_buffers(inode); 1510dbd5768fSJan Kara clear_inode(inode); 15112ffd2a6aSKemeng Shi ext4_discard_preallocations(inode); 151251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1513f4c2d372SJan Kara dquot_drop(inode); 15148aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 15158aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 15168aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 15178aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 15188aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 15198aefcd55STheodore Ts'o } 15203d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1521c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1522ac27a0ecSDave Kleikamp } 1523ac27a0ecSDave Kleikamp 15241b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 15251b961ac0SChristoph Hellwig u64 ino, u32 generation) 1526ac27a0ecSDave Kleikamp { 1527ac27a0ecSDave Kleikamp struct inode *inode; 1528ac27a0ecSDave Kleikamp 15298a363970STheodore Ts'o /* 1530ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1531ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1532ac27a0ecSDave Kleikamp */ 15338a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 15341d1fe1eeSDavid Howells if (IS_ERR(inode)) 15351d1fe1eeSDavid Howells return ERR_CAST(inode); 15361d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1537ac27a0ecSDave Kleikamp iput(inode); 1538ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1539ac27a0ecSDave Kleikamp } 15401b961ac0SChristoph Hellwig 15411b961ac0SChristoph Hellwig return inode; 1542ac27a0ecSDave Kleikamp } 15431b961ac0SChristoph Hellwig 15441b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 15451b961ac0SChristoph Hellwig int fh_len, int fh_type) 15461b961ac0SChristoph Hellwig { 15471b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 15481b961ac0SChristoph Hellwig ext4_nfs_get_inode); 15491b961ac0SChristoph Hellwig } 15501b961ac0SChristoph Hellwig 15511b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 15521b961ac0SChristoph Hellwig int fh_len, int fh_type) 15531b961ac0SChristoph Hellwig { 15541b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 15551b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1556ac27a0ecSDave Kleikamp } 1557ac27a0ecSDave Kleikamp 1558fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1559fde87268STheodore Ts'o { 1560fde87268STheodore Ts'o struct writeback_control wbc = { 1561fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1562fde87268STheodore Ts'o }; 1563fde87268STheodore Ts'o 1564fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1565fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1566fde87268STheodore Ts'o } 1567fde87268STheodore Ts'o 1568ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1569d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1570689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1571ac27a0ecSDave Kleikamp 1572617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1573617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1574617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1575617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1576617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15776f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15788c54ca9cSAl Viro const struct path *path); 1579617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1580ac27a0ecSDave Kleikamp size_t len, loff_t off); 1581617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1582ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15837c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15847c319d32SAditya Kali unsigned int flags); 1585ac27a0ecSDave Kleikamp 1586ccb49011SJan Kara static struct dquot __rcu **ext4_get_dquots(struct inode *inode) 158796c7e0d9SJan Kara { 158896c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 158996c7e0d9SJan Kara } 159096c7e0d9SJan Kara 159161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 159260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1593617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1594617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1595617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1596617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1597a5b5ee32SJan Kara .write_info = ext4_write_info, 1598a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1599a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1600040cb378SLi Xi .get_projid = ext4_get_projid, 16017a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1602ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1603ac27a0ecSDave Kleikamp }; 1604ac27a0ecSDave Kleikamp 16050d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1606617ba13bSMingming Cao .quota_on = ext4_quota_on, 1607ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1608287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 16090a240339SJan Kara .get_state = dquot_get_state, 1610287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1611287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 16126332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 16136332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1614ac27a0ecSDave Kleikamp }; 1615ac27a0ecSDave Kleikamp #endif 1616ac27a0ecSDave Kleikamp 1617ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1618617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 161994053139SAl Viro .free_inode = ext4_free_in_core_inode, 1620617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1621617ba13bSMingming Cao .write_inode = ext4_write_inode, 1622617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 16237ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 16240930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1625617ba13bSMingming Cao .put_super = ext4_put_super, 1626617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1627c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1628c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1629617ba13bSMingming Cao .statfs = ext4_statfs, 1630617ba13bSMingming Cao .show_options = ext4_show_options, 1631f5db130dSChristoph Hellwig .shutdown = ext4_shutdown, 1632ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1633617ba13bSMingming Cao .quota_read = ext4_quota_read, 1634617ba13bSMingming Cao .quota_write = ext4_quota_write, 163596c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1636ac27a0ecSDave Kleikamp #endif 1637ac27a0ecSDave Kleikamp }; 1638ac27a0ecSDave Kleikamp 163939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 1640e21fc203SAmir Goldstein .encode_fh = generic_encode_ino32_fh, 16411b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 16421b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1643617ba13bSMingming Cao .get_parent = ext4_get_parent, 1644fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1645ac27a0ecSDave Kleikamp }; 1646ac27a0ecSDave Kleikamp 1647ac27a0ecSDave Kleikamp enum { 1648ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1649ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 165072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 16512d544ec9SYang Xu Opt_user_xattr, Opt_acl, 165272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1653ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1654ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1655ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 16566ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 16574f74d15fSEric Biggers Opt_inlinecrypt, 1658ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1659ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 16601ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 16619cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1662327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 16634437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 16641449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 16655328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1666744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1667fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1668cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 166921175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1670e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 16718016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 167299c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16738016e29fSHarshad Shirwadkar #endif 1674ac27a0ecSDave Kleikamp }; 1675ac27a0ecSDave Kleikamp 1676e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1677ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1678ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1679ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1680e5a185c2SLukas Czerner {} 1681e5a185c2SLukas Czerner }; 1682e5a185c2SLukas Czerner 1683e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1684ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1685ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1686ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1687e5a185c2SLukas Czerner {} 1688e5a185c2SLukas Czerner }; 1689e5a185c2SLukas Czerner 1690e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1691e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1692e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1693e5a185c2SLukas Czerner {} 1694e5a185c2SLukas Czerner }; 1695e5a185c2SLukas Czerner 1696e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1697ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1698ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1699ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1700e5a185c2SLukas Czerner {} 1701e5a185c2SLukas Czerner }; 1702e5a185c2SLukas Czerner 1703e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1704e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1705e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1706e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1707e5a185c2SLukas Czerner {} 1708e5a185c2SLukas Czerner }; 1709e5a185c2SLukas Czerner 1710e5a185c2SLukas Czerner /* 1711e5a185c2SLukas Czerner * Mount option specification 1712e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1713e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1714e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1715e5a185c2SLukas Czerner * separate for now. 1716e5a185c2SLukas Czerner */ 1717e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1718e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1719e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1720e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1721e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1722e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1723e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1724e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1725e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1726e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1727e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1728e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1729e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1730e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1731e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1732e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1733e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1734e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1735e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1736e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1737e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1738e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1739e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1740e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1741e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1742e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1743e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1744e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1745e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1746e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1747e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1748e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1749e5a185c2SLukas Czerner ext4_param_data_err), 1750e5a185c2SLukas Czerner fsparam_string_empty 1751e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1752e5a185c2SLukas Czerner fsparam_string_empty 1753e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1754e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1755e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1756e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1757e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1758e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1759e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1760e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1761e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1762e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 17631ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1764e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1765e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1766e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1767e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1768e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1769e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1770e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1771e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1772e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1773e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1774e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1775e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1776e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1777e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1778e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1779e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1780e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1781e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1782e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1783e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1784e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1785e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1786e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1787e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1788e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1789e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1790e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1791e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1792e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1793e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1794e5a185c2SLukas Czerner #endif 1795e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1796e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1797e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1798e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1799e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1800e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1801e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1802e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1803e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1804e5a185c2SLukas Czerner Opt_removed), 1805e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1806e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1807e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1808e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1809e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1810e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1811e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1812e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1813e5a185c2SLukas Czerner {} 1814e5a185c2SLukas Czerner }; 1815e5a185c2SLukas Czerner 1816b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1817196e402aSHarshad Shirwadkar 181826092bf5STheodore Ts'o #define MOPT_SET 0x0001 181926092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 182026092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 182126092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 182226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 182326092bf5STheodore Ts'o #define MOPT_Q 0 1824ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 182526092bf5STheodore Ts'o #else 182626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 182726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 182826092bf5STheodore Ts'o #endif 1829ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1830ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 18318dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1832ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1833ba2e524dSLukas Czerner #define MOPT_2 0x0100 183426092bf5STheodore Ts'o 183526092bf5STheodore Ts'o static const struct mount_opts { 183626092bf5STheodore Ts'o int token; 183726092bf5STheodore Ts'o int mount_opt; 183826092bf5STheodore Ts'o int flags; 183926092bf5STheodore Ts'o } ext4_mount_opts[] = { 184026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 184126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 184226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 184326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 184426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 184526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 18468dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 18478dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 18488dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 18498dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 185026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 185126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 18528dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 18538dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18548dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 185559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1856327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1857327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1858cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1859c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1860c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 18618dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 18621e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 186326092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18648dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18651e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18668dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1867ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 186826092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 186926092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 187026092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 187126092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 187226092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1873ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1874ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1875ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1876ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1877ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 187826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 187926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 188026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 188126092bf5STheodore Ts'o #else 188226092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 188326092bf5STheodore Ts'o #endif 188426092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 188526092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 188626092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 188726092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 188826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 188926092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 189026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 189149da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 189249da9392SJan Kara MOPT_SET | MOPT_Q}, 189326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 189449da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 189549da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1896ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1897ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1898ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1899cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 190021175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 19013d392b26STheodore Ts'o MOPT_SET}, 190299c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 19030f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 19040f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 19058016e29fSHarshad Shirwadkar #endif 190622b8d707SJan Kara {Opt_abort, EXT4_MOUNT2_ABORT, MOPT_SET | MOPT_2}, 190726092bf5STheodore Ts'o {Opt_err, 0, 0} 190826092bf5STheodore Ts'o }; 190926092bf5STheodore Ts'o 19105298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1911c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1912c83ad55eSGabriel Krisman Bertazi __u16 magic; 1913c83ad55eSGabriel Krisman Bertazi char *name; 191449bd03ccSChristoph Hellwig unsigned int version; 1915c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 191649bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1917c83ad55eSGabriel Krisman Bertazi }; 1918c83ad55eSGabriel Krisman Bertazi 1919aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1920aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1921c83ad55eSGabriel Krisman Bertazi { 1922c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1923c83ad55eSGabriel Krisman Bertazi int i; 1924c83ad55eSGabriel Krisman Bertazi 1925c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1926c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1927aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1928c83ad55eSGabriel Krisman Bertazi 1929aa8bf298SChristoph Hellwig return NULL; 1930c83ad55eSGabriel Krisman Bertazi } 1931c83ad55eSGabriel Krisman Bertazi #endif 1932c83ad55eSGabriel Krisman Bertazi 19336e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 19346e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 19356e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 19366e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 19376e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 19386e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 19396e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 19406e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 19416e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 19426e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 19436e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 19446e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 19456e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 19466e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 19476e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 19486e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 19496e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 19507edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 195127b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 19526e47a3ccSLukas Czerner 1953461c3af0SLukas Czerner struct ext4_fs_context { 1954e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 195585456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1956e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 19576e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 19586e47a3ccSLukas Czerner int s_fc_debug_max_replay; 19596e47a3ccSLukas Czerner #endif 19606e47a3ccSLukas Czerner unsigned short qname_spec; 19616e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 19626e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 19636e47a3ccSLukas Czerner unsigned long journal_devnum; 19646e47a3ccSLukas Czerner unsigned long s_commit_interval; 19656e47a3ccSLukas Czerner unsigned long s_stripe; 19666e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19676e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19686e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19696e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19706e47a3ccSLukas Czerner unsigned int journal_ioprio; 19716e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19726e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19736e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19746e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1975b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19766e47a3ccSLukas Czerner unsigned int spec; 19776e47a3ccSLukas Czerner u32 s_max_batch_time; 19786e47a3ccSLukas Czerner u32 s_min_batch_time; 19796e47a3ccSLukas Czerner kuid_t s_resuid; 19806e47a3ccSLukas Czerner kgid_t s_resgid; 19817edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1982b237e304SHarshad Shirwadkar }; 1983b237e304SHarshad Shirwadkar 1984cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1985cebe85d5SLukas Czerner { 1986cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1987cebe85d5SLukas Czerner int i; 1988cebe85d5SLukas Czerner 1989cebe85d5SLukas Czerner if (!ctx) 1990cebe85d5SLukas Czerner return; 1991cebe85d5SLukas Czerner 1992cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1993cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1994cebe85d5SLukas Czerner 199585456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1996cebe85d5SLukas Czerner kfree(ctx); 1997cebe85d5SLukas Czerner } 1998cebe85d5SLukas Czerner 1999cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 2000cebe85d5SLukas Czerner { 2001da9e4802SDan Carpenter struct ext4_fs_context *ctx; 2002cebe85d5SLukas Czerner 2003cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 2004cebe85d5SLukas Czerner if (!ctx) 2005cebe85d5SLukas Czerner return -ENOMEM; 2006cebe85d5SLukas Czerner 2007cebe85d5SLukas Czerner fc->fs_private = ctx; 2008cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 2009cebe85d5SLukas Czerner 2010cebe85d5SLukas Czerner return 0; 2011cebe85d5SLukas Czerner } 2012cebe85d5SLukas Czerner 2013e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2014e6e268cbSLukas Czerner /* 2015e6e268cbSLukas Czerner * Note the name of the specified quota file. 2016e6e268cbSLukas Czerner */ 2017e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 2018e6e268cbSLukas Czerner struct fs_parameter *param) 2019e6e268cbSLukas Czerner { 2020e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2021e6e268cbSLukas Czerner char *qname; 2022e6e268cbSLukas Czerner 2023e6e268cbSLukas Czerner if (param->size < 1) { 2024e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 2025e6e268cbSLukas Czerner return -EINVAL; 2026e6e268cbSLukas Czerner } 2027e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 2028e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2029e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 2030e6e268cbSLukas Czerner return -EINVAL; 2031e6e268cbSLukas Czerner } 2032e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 2033e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 2034e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2035e6e268cbSLukas Czerner "%s quota file already specified", 2036e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 2037e6e268cbSLukas Czerner return -EINVAL; 2038e6e268cbSLukas Czerner } 2039e6e268cbSLukas Czerner return 0; 2040e6e268cbSLukas Czerner } 2041e6e268cbSLukas Czerner 2042e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 2043e6e268cbSLukas Czerner if (!qname) { 2044e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2045e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 2046e6e268cbSLukas Czerner return -ENOMEM; 2047e6e268cbSLukas Czerner } 2048e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 2049e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20506e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2051e6e268cbSLukas Czerner return 0; 2052e6e268cbSLukas Czerner } 2053e6e268cbSLukas Czerner 2054e6e268cbSLukas Czerner /* 2055e6e268cbSLukas Czerner * Clear the name of the specified quota file. 2056e6e268cbSLukas Czerner */ 2057e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 2058e6e268cbSLukas Czerner { 2059e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2060e6e268cbSLukas Czerner 2061e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2062e6e268cbSLukas Czerner 2063e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2064e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20656e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2066e6e268cbSLukas Czerner return 0; 2067e6e268cbSLukas Czerner } 2068e6e268cbSLukas Czerner #endif 2069e6e268cbSLukas Czerner 207085456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 207185456054SEric Biggers struct ext4_fs_context *ctx) 207285456054SEric Biggers { 207385456054SEric Biggers int err; 207485456054SEric Biggers 207585456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 207685456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 207785456054SEric Biggers "test_dummy_encryption option not supported"); 207885456054SEric Biggers return -EINVAL; 207985456054SEric Biggers } 208085456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 208185456054SEric Biggers &ctx->dummy_enc_policy); 208285456054SEric Biggers if (err == -EINVAL) { 208385456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 208485456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 208585456054SEric Biggers } else if (err == -EEXIST) { 208685456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 208785456054SEric Biggers "Conflicting test_dummy_encryption options"); 208885456054SEric Biggers return -EINVAL; 208985456054SEric Biggers } 209085456054SEric Biggers return err; 209185456054SEric Biggers } 209285456054SEric Biggers 20936e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20944c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20954c246728SLukas Czerner unsigned long flag) \ 20966e47a3ccSLukas Czerner { \ 20976e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20986e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2099e3952fccSLukas Czerner } 2100e3952fccSLukas Czerner 2101e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 21024c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 21034c246728SLukas Czerner unsigned long flag) \ 21046e47a3ccSLukas Czerner { \ 21056e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 21066e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2107e3952fccSLukas Czerner } 2108e3952fccSLukas Czerner 2109e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 21104c246728SLukas Czerner static inline unsigned long \ 21114c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 21126e47a3ccSLukas Czerner { \ 21134c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2114e3952fccSLukas Czerner } 21156e47a3ccSLukas Czerner 2116e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 21176e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2118e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2119e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 21206e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2121e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2122e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2123e3952fccSLukas Czerner 212402f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 212526092bf5STheodore Ts'o { 2126461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2127461c3af0SLukas Czerner struct fs_parse_result result; 212826092bf5STheodore Ts'o const struct mount_opts *m; 2129461c3af0SLukas Czerner int is_remount; 213008cefc7aSEric W. Biederman kuid_t uid; 213108cefc7aSEric W. Biederman kgid_t gid; 2132461c3af0SLukas Czerner int token; 2133461c3af0SLukas Czerner 2134461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2135461c3af0SLukas Czerner if (token < 0) 2136461c3af0SLukas Czerner return token; 2137461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 213826092bf5STheodore Ts'o 2139ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2140ba2e524dSLukas Czerner if (token == m->token) 2141ba2e524dSLukas Czerner break; 2142ba2e524dSLukas Czerner 2143ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2144ba2e524dSLukas Czerner 2145ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2146ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2147ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2148ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2149ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2150ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2151ba2e524dSLukas Czerner } else 2152ba2e524dSLukas Czerner return -EINVAL; 2153ba2e524dSLukas Czerner } 2154ba2e524dSLukas Czerner 2155ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2156ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2157ba2e524dSLukas Czerner param->key); 2158ba2e524dSLukas Czerner return 0; 2159ba2e524dSLukas Czerner } 2160ba2e524dSLukas Czerner 2161ba2e524dSLukas Czerner switch (token) { 216257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2163ba2e524dSLukas Czerner case Opt_usrjquota: 2164461c3af0SLukas Czerner if (!*param->string) 2165e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2166461c3af0SLukas Czerner else 2167e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2168ba2e524dSLukas Czerner case Opt_grpjquota: 2169461c3af0SLukas Czerner if (!*param->string) 2170e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2171461c3af0SLukas Czerner else 2172e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 217357f73c2cSTheodore Ts'o #endif 217426092bf5STheodore Ts'o case Opt_sb: 21757edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21767edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21777edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21787edfd85bSLukas Czerner } else { 21797edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21807edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21817edfd85bSLukas Czerner } 218202f960f8SLukas Czerner return 0; 218326092bf5STheodore Ts'o case Opt_removed: 2184da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2185461c3af0SLukas Czerner param->key); 218602f960f8SLukas Czerner return 0; 21874f74d15fSEric Biggers case Opt_inlinecrypt: 21884f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21896e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21904f74d15fSEric Biggers #else 2191da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21924f74d15fSEric Biggers #endif 219302f960f8SLukas Czerner return 0; 2194461c3af0SLukas Czerner case Opt_errors: 21956e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2196ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2197ba2e524dSLukas Czerner return 0; 2198ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2199ba2e524dSLukas Czerner case Opt_jqfmt: 2200ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2201ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2202ba2e524dSLukas Czerner return 0; 2203ba2e524dSLukas Czerner #endif 2204ba2e524dSLukas Czerner case Opt_data: 2205ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2206ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2207ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2208ba2e524dSLukas Czerner return 0; 2209ba2e524dSLukas Czerner case Opt_commit: 2210461c3af0SLukas Czerner if (result.uint_32 == 0) 2211934b0de1SWang Jianjian result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE; 2212461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2213da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22149ba55543Szhangyi (F) "Invalid commit interval %d, " 22159ba55543Szhangyi (F) "must be smaller than %d", 2216461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2217da812f61SLukas Czerner return -EINVAL; 22189ba55543Szhangyi (F) } 22196e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 22206e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2221ba2e524dSLukas Czerner return 0; 2222ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 22236e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2224da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2225461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2226da812f61SLukas Czerner return -EINVAL; 22279803387cSTheodore Ts'o } 22286e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 22296e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2230ba2e524dSLukas Czerner return 0; 2231ba2e524dSLukas Czerner case Opt_max_batch_time: 22326e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 22336e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2234ba2e524dSLukas Czerner return 0; 2235ba2e524dSLukas Czerner case Opt_min_batch_time: 22366e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 22376e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2238ba2e524dSLukas Czerner return 0; 2239ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2240461c3af0SLukas Czerner if (result.uint_32 && 2241461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2242461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2243da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2244e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2245e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2246da812f61SLukas Czerner return -EINVAL; 224726092bf5STheodore Ts'o } 22486e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 22496e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2250ba2e524dSLukas Czerner return 0; 2251ba2e524dSLukas Czerner case Opt_init_itable: 22526e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22536e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2254461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22556e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22566e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2257ba2e524dSLukas Czerner return 0; 2258ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22596e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22606e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2261ba2e524dSLukas Czerner return 0; 22628016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2263ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22646e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22656e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2266ba2e524dSLukas Czerner return 0; 22678016e29fSHarshad Shirwadkar #endif 2268ba2e524dSLukas Czerner case Opt_stripe: 22696e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22706e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2271ba2e524dSLukas Czerner return 0; 2272ba2e524dSLukas Czerner case Opt_resuid: 2273461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22740efb3b23SJan Kara if (!uid_valid(uid)) { 2275da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2276461c3af0SLukas Czerner result.uint_32); 2277da812f61SLukas Czerner return -EINVAL; 22780efb3b23SJan Kara } 22796e47a3ccSLukas Czerner ctx->s_resuid = uid; 22806e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2281ba2e524dSLukas Czerner return 0; 2282ba2e524dSLukas Czerner case Opt_resgid: 2283461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22840efb3b23SJan Kara if (!gid_valid(gid)) { 2285da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2286461c3af0SLukas Czerner result.uint_32); 2287da812f61SLukas Czerner return -EINVAL; 22880efb3b23SJan Kara } 22896e47a3ccSLukas Czerner ctx->s_resgid = gid; 22906e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2291ba2e524dSLukas Czerner return 0; 2292ba2e524dSLukas Czerner case Opt_journal_dev: 22930efb3b23SJan Kara if (is_remount) { 2294da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22950efb3b23SJan Kara "Cannot specify journal on remount"); 2296da812f61SLukas Czerner return -EINVAL; 22970efb3b23SJan Kara } 2298461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22996e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2300ba2e524dSLukas Czerner return 0; 2301ba2e524dSLukas Czerner case Opt_journal_path: 2302ba2e524dSLukas Czerner { 2303ad4eec61SEric Sandeen struct inode *journal_inode; 2304ad4eec61SEric Sandeen struct path path; 2305ad4eec61SEric Sandeen int error; 2306ad4eec61SEric Sandeen 2307ad4eec61SEric Sandeen if (is_remount) { 2308da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2309ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2310da812f61SLukas Czerner return -EINVAL; 2311ad4eec61SEric Sandeen } 2312ad4eec61SEric Sandeen 2313e3ea75eeSLukas Czerner error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path); 2314ad4eec61SEric Sandeen if (error) { 2315da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2316461c3af0SLukas Czerner "journal device path"); 2317da812f61SLukas Czerner return -EINVAL; 2318ad4eec61SEric Sandeen } 2319ad4eec61SEric Sandeen 23202b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2321461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 23226e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2323ad4eec61SEric Sandeen path_put(&path); 2324ba2e524dSLukas Czerner return 0; 2325ba2e524dSLukas Czerner } 2326ba2e524dSLukas Czerner case Opt_journal_ioprio: 2327461c3af0SLukas Czerner if (result.uint_32 > 7) { 2328da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 23290efb3b23SJan Kara " (must be 0-7)"); 2330da812f61SLukas Czerner return -EINVAL; 23310efb3b23SJan Kara } 2332461c3af0SLukas Czerner ctx->journal_ioprio = 2333461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 23346e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2335ba2e524dSLukas Czerner return 0; 2336ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 233785456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2338ba2e524dSLukas Czerner case Opt_dax: 2339ba2e524dSLukas Czerner case Opt_dax_type: 2340ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2341ba2e524dSLukas Czerner { 2342ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2343ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2344ba2e524dSLukas Czerner 2345ba2e524dSLukas Czerner switch (type) { 23469cb20f94SIra Weiny case Opt_dax: 23479cb20f94SIra Weiny case Opt_dax_always: 2348ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23496e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23509cb20f94SIra Weiny break; 23519cb20f94SIra Weiny case Opt_dax_never: 2352ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23536e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23549cb20f94SIra Weiny break; 23559cb20f94SIra Weiny case Opt_dax_inode: 23566e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23576e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23589cb20f94SIra Weiny /* Strictly for printing options */ 2359ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23609cb20f94SIra Weiny break; 23619cb20f94SIra Weiny } 2362ba2e524dSLukas Czerner return 0; 2363ba2e524dSLukas Czerner } 2364ef83b6e8SDan Williams #else 2365da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2366da812f61SLukas Czerner return -EINVAL; 2367923ae0ffSRoss Zwisler #endif 2368ba2e524dSLukas Czerner case Opt_data_err: 2369ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23706e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2371ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23726e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2373ba2e524dSLukas Czerner return 0; 2374ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 237527b38686SOjaswin Mujoo if (result.int_32 == 1) { 237627b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 237727b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 237827b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 237927b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 238027b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 238127b38686SOjaswin Mujoo } else { 2382da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2383196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2384da812f61SLukas Czerner return -EINVAL; 2385196e402aSHarshad Shirwadkar } 2386ba2e524dSLukas Czerner return 0; 2387ba2e524dSLukas Czerner } 2388ba2e524dSLukas Czerner 2389ba2e524dSLukas Czerner /* 2390ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2391ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2392ba2e524dSLukas Czerner */ 2393ba2e524dSLukas Czerner if (m->token == Opt_err) { 2394ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2395ba2e524dSLukas Czerner param->key); 2396ba2e524dSLukas Czerner WARN_ON(1); 2397ba2e524dSLukas Czerner return -EINVAL; 2398ba2e524dSLukas Czerner } 2399ba2e524dSLukas Czerner 2400ba2e524dSLukas Czerner else { 2401461c3af0SLukas Czerner unsigned int set = 0; 2402461c3af0SLukas Czerner 2403461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2404461c3af0SLukas Czerner result.uint_32 > 0) 2405461c3af0SLukas Czerner set = 1; 2406461c3af0SLukas Czerner 240726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2408461c3af0SLukas Czerner set = !set; 240926092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2410da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2411461c3af0SLukas Czerner "buggy handling of option %s", 2412461c3af0SLukas Czerner param->key); 241326092bf5STheodore Ts'o WARN_ON(1); 2414da812f61SLukas Czerner return -EINVAL; 241526092bf5STheodore Ts'o } 2416995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2417461c3af0SLukas Czerner if (set != 0) 24186e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2419995a3ed6SHarshad Shirwadkar else 24206e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2421995a3ed6SHarshad Shirwadkar } else { 2422461c3af0SLukas Czerner if (set != 0) 24236e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 242426092bf5STheodore Ts'o else 24256e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 242626092bf5STheodore Ts'o } 2427995a3ed6SHarshad Shirwadkar } 2428ba2e524dSLukas Czerner 242902f960f8SLukas Czerner return 0; 243026092bf5STheodore Ts'o } 243126092bf5STheodore Ts'o 24327edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2433ac27a0ecSDave Kleikamp { 2434461c3af0SLukas Czerner struct fs_parameter param; 2435461c3af0SLukas Czerner int ret; 2436461c3af0SLukas Czerner char *key; 2437ac27a0ecSDave Kleikamp 2438ac27a0ecSDave Kleikamp if (!options) 24397edfd85bSLukas Czerner return 0; 2440461c3af0SLukas Czerner 2441461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2442461c3af0SLukas Czerner if (*key) { 2443461c3af0SLukas Czerner size_t v_len = 0; 2444461c3af0SLukas Czerner char *value = strchr(key, '='); 2445461c3af0SLukas Czerner 2446461c3af0SLukas Czerner param.type = fs_value_is_flag; 2447461c3af0SLukas Czerner param.string = NULL; 2448461c3af0SLukas Czerner 2449461c3af0SLukas Czerner if (value) { 2450461c3af0SLukas Czerner if (value == key) 2451ac27a0ecSDave Kleikamp continue; 2452461c3af0SLukas Czerner 2453461c3af0SLukas Czerner *value++ = 0; 2454461c3af0SLukas Czerner v_len = strlen(value); 2455461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2456461c3af0SLukas Czerner GFP_KERNEL); 2457461c3af0SLukas Czerner if (!param.string) 24587edfd85bSLukas Czerner return -ENOMEM; 2459461c3af0SLukas Czerner param.type = fs_value_is_string; 2460461c3af0SLukas Czerner } 2461461c3af0SLukas Czerner 2462461c3af0SLukas Czerner param.key = key; 2463461c3af0SLukas Czerner param.size = v_len; 2464461c3af0SLukas Czerner 246502f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2466461c3af0SLukas Czerner kfree(param.string); 2467461c3af0SLukas Czerner if (ret < 0) 24687edfd85bSLukas Czerner return ret; 2469ac27a0ecSDave Kleikamp } 2470461c3af0SLukas Czerner } 2471461c3af0SLukas Czerner 24727edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2473da812f61SLukas Czerner if (ret < 0) 24747edfd85bSLukas Czerner return ret; 24757edfd85bSLukas Czerner 24767edfd85bSLukas Czerner return 0; 24777edfd85bSLukas Czerner } 24787edfd85bSLukas Czerner 24797edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24807edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24817edfd85bSLukas Czerner { 24827edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24837edfd85bSLukas Czerner char *s_mount_opts = NULL; 24847edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24857edfd85bSLukas Czerner struct fs_context *fc = NULL; 24867edfd85bSLukas Czerner int ret = -ENOMEM; 24877edfd85bSLukas Czerner 24887edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2489da812f61SLukas Czerner return 0; 2490da812f61SLukas Czerner 24917edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24927edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24937edfd85bSLukas Czerner GFP_KERNEL); 24947edfd85bSLukas Czerner if (!s_mount_opts) 24957edfd85bSLukas Czerner return ret; 2496e6e268cbSLukas Czerner 24977edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24987edfd85bSLukas Czerner if (!fc) 24997edfd85bSLukas Czerner goto out_free; 2500e6e268cbSLukas Czerner 25017edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 25027edfd85bSLukas Czerner if (!s_ctx) 25037edfd85bSLukas Czerner goto out_free; 25047edfd85bSLukas Czerner 25057edfd85bSLukas Czerner fc->fs_private = s_ctx; 25067edfd85bSLukas Czerner fc->s_fs_info = sbi; 25077edfd85bSLukas Czerner 25087edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 25097edfd85bSLukas Czerner if (ret < 0) 25107edfd85bSLukas Czerner goto parse_failed; 25117edfd85bSLukas Czerner 25127edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 25137edfd85bSLukas Czerner if (ret < 0) { 25147edfd85bSLukas Czerner parse_failed: 25157edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 25167edfd85bSLukas Czerner "failed to parse options in superblock: %s", 25177edfd85bSLukas Czerner s_mount_opts); 25187edfd85bSLukas Czerner ret = 0; 25197edfd85bSLukas Czerner goto out_free; 25207edfd85bSLukas Czerner } 25217edfd85bSLukas Czerner 25227edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 25237edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 25247edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 25257edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 25267edfd85bSLukas Czerner 252785456054SEric Biggers ext4_apply_options(fc, sb); 252885456054SEric Biggers ret = 0; 25297edfd85bSLukas Czerner 25307edfd85bSLukas Czerner out_free: 2531c069db76SEric Biggers if (fc) { 2532c069db76SEric Biggers ext4_fc_free(fc); 25337edfd85bSLukas Czerner kfree(fc); 2534c069db76SEric Biggers } 25357edfd85bSLukas Czerner kfree(s_mount_opts); 25367edfd85bSLukas Czerner return ret; 25374c94bff9SLukas Czerner } 25384c94bff9SLukas Czerner 2539e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2540e6e268cbSLukas Czerner struct super_block *sb) 2541e6e268cbSLukas Czerner { 2542e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 25436e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2544e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2545e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2546e6e268cbSLukas Czerner char *qname; 2547e6e268cbSLukas Czerner int i; 2548e6e268cbSLukas Czerner 25496e47a3ccSLukas Czerner if (quota_feature) 25506e47a3ccSLukas Czerner return; 25516e47a3ccSLukas Czerner 25526e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2553e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2554e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2555e6e268cbSLukas Czerner continue; 25566e47a3ccSLukas Czerner 2557e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25584c1bd5a9SLukas Czerner if (qname) 25594c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2560e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 256113b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 256213b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 256313b215a9SLukas Czerner if (qname) 256410e4f310SUladzislau Rezki (Sony) kfree_rcu_mightsleep(qname); 2565e6e268cbSLukas Czerner } 25666e47a3ccSLukas Czerner } 25676e47a3ccSLukas Czerner 25686e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25696e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2570e6e268cbSLukas Czerner #endif 2571e6e268cbSLukas Czerner } 2572e6e268cbSLukas Czerner 2573e6e268cbSLukas Czerner /* 2574e6e268cbSLukas Czerner * Check quota settings consistency. 2575e6e268cbSLukas Czerner */ 2576e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2577e6e268cbSLukas Czerner struct super_block *sb) 2578e6e268cbSLukas Czerner { 2579e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2580e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2581e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2582e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2583e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25846e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25856e47a3ccSLukas Czerner int quota_flags, i; 2586e6e268cbSLukas Czerner 25876e47a3ccSLukas Czerner /* 25886e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25896e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25906e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25916e47a3ccSLukas Czerner */ 25926e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25936e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25946e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25956e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25966e47a3ccSLukas Czerner return -EINVAL; 25976e47a3ccSLukas Czerner } 25986e47a3ccSLukas Czerner 25996e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 26006e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 26016e47a3ccSLukas Czerner if (quota_loaded && 26026e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 26036e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 26046e47a3ccSLukas Czerner goto err_quota_change; 26056e47a3ccSLukas Czerner 26066e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2607e6e268cbSLukas Czerner 2608e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2609e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2610e6e268cbSLukas Czerner continue; 2611e6e268cbSLukas Czerner 26126e47a3ccSLukas Czerner if (quota_loaded && 26136e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2614e6e268cbSLukas Czerner goto err_jquota_change; 2615e6e268cbSLukas Czerner 2616e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 261713b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2618e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2619e6e268cbSLukas Czerner goto err_jquota_specified; 2620e6e268cbSLukas Czerner } 26216e47a3ccSLukas Czerner 26226e47a3ccSLukas Czerner if (quota_feature) { 26236e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 26246e47a3ccSLukas Czerner "Journaled quota options ignored when " 26256e47a3ccSLukas Czerner "QUOTA feature is enabled"); 26266e47a3ccSLukas Czerner return 0; 26276e47a3ccSLukas Czerner } 2628e6e268cbSLukas Czerner } 2629e6e268cbSLukas Czerner 26306e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2631e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 26326e47a3ccSLukas Czerner goto err_jquota_change; 2633e6e268cbSLukas Czerner if (quota_feature) { 2634e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2635e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2636e6e268cbSLukas Czerner return 0; 2637e6e268cbSLukas Czerner } 2638e6e268cbSLukas Czerner } 26396e47a3ccSLukas Czerner 26406e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 26416e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 26426e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 26436e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 26446e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 26456e47a3ccSLukas Czerner 26466e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 26476e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 26486e47a3ccSLukas Czerner 26496e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 26506e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 26516e47a3ccSLukas Czerner 26526e47a3ccSLukas Czerner if (usr_qf_name) { 26536e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26546e47a3ccSLukas Czerner usrquota = false; 26556e47a3ccSLukas Czerner } 26566e47a3ccSLukas Czerner if (grp_qf_name) { 26576e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26586e47a3ccSLukas Czerner grpquota = false; 26596e47a3ccSLukas Czerner } 26606e47a3ccSLukas Czerner 26616e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26626e47a3ccSLukas Czerner if (usrquota || grpquota) { 26636e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26646e47a3ccSLukas Czerner "format mixing"); 26656e47a3ccSLukas Czerner return -EINVAL; 26666e47a3ccSLukas Czerner } 26676e47a3ccSLukas Czerner 26686e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26696e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26706e47a3ccSLukas Czerner "not specified"); 26716e47a3ccSLukas Czerner return -EINVAL; 26726e47a3ccSLukas Czerner } 26736e47a3ccSLukas Czerner } 26746e47a3ccSLukas Czerner 2675e6e268cbSLukas Czerner return 0; 2676e6e268cbSLukas Czerner 2677e6e268cbSLukas Czerner err_quota_change: 2678e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2679e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2680e6e268cbSLukas Czerner return -EINVAL; 2681e6e268cbSLukas Czerner err_jquota_change: 2682e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2683e6e268cbSLukas Czerner "options when quota turned on"); 2684e6e268cbSLukas Czerner return -EINVAL; 2685e6e268cbSLukas Czerner err_jquota_specified: 2686e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2687e6e268cbSLukas Czerner QTYPE2NAME(i)); 2688e6e268cbSLukas Czerner return -EINVAL; 2689e6e268cbSLukas Czerner #else 2690e6e268cbSLukas Czerner return 0; 2691e6e268cbSLukas Czerner #endif 2692e6e268cbSLukas Czerner } 2693e6e268cbSLukas Czerner 26945f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26955f41fdaeSEric Biggers struct super_block *sb) 26965f41fdaeSEric Biggers { 26975f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26985f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 26995f41fdaeSEric Biggers 270085456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 27015f41fdaeSEric Biggers return 0; 27025f41fdaeSEric Biggers 27035f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 27045f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 27055f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 27065f41fdaeSEric Biggers return -EINVAL; 27075f41fdaeSEric Biggers } 27085f41fdaeSEric Biggers /* 27095f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 27105f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 27115f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 27125f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 27135f41fdaeSEric Biggers */ 271485456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 271585456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 271685456054SEric Biggers &ctx->dummy_enc_policy)) 271785456054SEric Biggers return 0; 27185f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 271985456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 27205f41fdaeSEric Biggers return -EINVAL; 27215f41fdaeSEric Biggers } 272285456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 272385456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 272485456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 272585456054SEric Biggers &ctx->dummy_enc_policy)) 27265f41fdaeSEric Biggers return 0; 272785456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 272885456054SEric Biggers "Conflicting test_dummy_encryption options"); 272985456054SEric Biggers return -EINVAL; 273085456054SEric Biggers } 27317959eb19SEric Biggers return 0; 273285456054SEric Biggers } 273385456054SEric Biggers 273485456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 273585456054SEric Biggers struct super_block *sb) 273685456054SEric Biggers { 273785456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 273885456054SEric Biggers /* if already set, it was already verified to be the same */ 273985456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 274085456054SEric Biggers return; 274185456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 274285456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 274385456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27445f41fdaeSEric Biggers } 27455f41fdaeSEric Biggers 2746b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2747b6bd2435SLukas Czerner struct super_block *sb) 2748b6bd2435SLukas Czerner { 2749b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27506e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27516e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27525f41fdaeSEric Biggers int err; 2753b6bd2435SLukas Czerner 2754b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2755b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2756b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2757b6bd2435SLukas Czerner return -EINVAL; 2758b6bd2435SLukas Czerner } 2759b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2760b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2761b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2762b6bd2435SLukas Czerner return -EINVAL; 2763b6bd2435SLukas Czerner } 2764b6bd2435SLukas Czerner 27656e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27666e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27676e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27686e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27696e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27706e47a3ccSLukas Czerner return -EINVAL; 27716e47a3ccSLukas Czerner } 27726e47a3ccSLukas Czerner 27735f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27745f41fdaeSEric Biggers if (err) 27755f41fdaeSEric Biggers return err; 27766e47a3ccSLukas Czerner 27776e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27786e47a3ccSLukas Czerner if (!sbi->s_journal) { 27796e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27806e47a3ccSLukas Czerner "Remounting file system with no journal " 27816e47a3ccSLukas Czerner "so ignoring journalled data option"); 27826e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27834c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27844c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27856e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27866e47a3ccSLukas Czerner "on remount"); 27876e47a3ccSLukas Czerner return -EINVAL; 27886e47a3ccSLukas Czerner } 27896e47a3ccSLukas Czerner } 27906e47a3ccSLukas Czerner 27916e47a3ccSLukas Czerner if (is_remount) { 27926e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27936e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27946e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27956e47a3ccSLukas Czerner "both data=journal and dax"); 27966e47a3ccSLukas Czerner return -EINVAL; 27976e47a3ccSLukas Czerner } 27986e47a3ccSLukas Czerner 27996e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 28006e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28016e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 28026e47a3ccSLukas Czerner fail_dax_change_remount: 28036e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 28046e47a3ccSLukas Czerner "dax mount option while remounting"); 28056e47a3ccSLukas Czerner return -EINVAL; 28066e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 28076e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28086e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 28096e47a3ccSLukas Czerner goto fail_dax_change_remount; 28106e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 28116e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 28126e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 28136e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 28146e47a3ccSLukas Czerner goto fail_dax_change_remount; 28156e47a3ccSLukas Czerner } 28166e47a3ccSLukas Czerner } 28176e47a3ccSLukas Czerner 2818b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2819b6bd2435SLukas Czerner } 2820b6bd2435SLukas Czerner 282185456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 28226e47a3ccSLukas Czerner { 28236e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28246e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 28256e47a3ccSLukas Czerner 28266e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28276e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28286e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28296e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28306e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28316e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28326e47a3ccSLukas Czerner 28336e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28346e47a3ccSLukas Czerner APPLY(s_commit_interval); 28356e47a3ccSLukas Czerner APPLY(s_stripe); 28366e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28376e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28386e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28396e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28406e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28416e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28426e47a3ccSLukas Czerner APPLY(s_resgid); 28436e47a3ccSLukas Czerner APPLY(s_resuid); 28446e47a3ccSLukas Czerner 28456e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28466e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28476e47a3ccSLukas Czerner #endif 28486e47a3ccSLukas Czerner 28496e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 285085456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28516e47a3ccSLukas Czerner } 28526e47a3ccSLukas Czerner 28536e47a3ccSLukas Czerner 2854da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28554c94bff9SLukas Czerner { 2856ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28576e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28584c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28596e47a3ccSLukas Czerner 28606e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28616e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28626e47a3ccSLukas Czerner 286333458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28646e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28656e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2866ac27a0ecSDave Kleikamp 28676e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28686e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2869ac27a0ecSDave Kleikamp 28706e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28716e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2872da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2873b31e1552SEric Sandeen "format mixing"); 2874da812f61SLukas Czerner return -EINVAL; 2875ac27a0ecSDave Kleikamp } 2876ac27a0ecSDave Kleikamp } 2877ac27a0ecSDave Kleikamp #endif 28786e47a3ccSLukas Czerner return 1; 2879ac27a0ecSDave Kleikamp } 2880ac27a0ecSDave Kleikamp 28812adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28822adf6da8STheodore Ts'o struct super_block *sb) 28832adf6da8STheodore Ts'o { 28842adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28852adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 288633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28872adf6da8STheodore Ts'o 28882adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28892adf6da8STheodore Ts'o char *fmtname = ""; 28902adf6da8STheodore Ts'o 28912adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28922adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28932adf6da8STheodore Ts'o fmtname = "vfsold"; 28942adf6da8STheodore Ts'o break; 28952adf6da8STheodore Ts'o case QFMT_VFS_V0: 28962adf6da8STheodore Ts'o fmtname = "vfsv0"; 28972adf6da8STheodore Ts'o break; 28982adf6da8STheodore Ts'o case QFMT_VFS_V1: 28992adf6da8STheodore Ts'o fmtname = "vfsv1"; 29002adf6da8STheodore Ts'o break; 29012adf6da8STheodore Ts'o } 29022adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 29032adf6da8STheodore Ts'o } 29042adf6da8STheodore Ts'o 290533458eabSTheodore Ts'o rcu_read_lock(); 290633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 290733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 290833458eabSTheodore Ts'o if (usr_qf_name) 290933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 291033458eabSTheodore Ts'o if (grp_qf_name) 291133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 291233458eabSTheodore Ts'o rcu_read_unlock(); 29132adf6da8STheodore Ts'o #endif 29142adf6da8STheodore Ts'o } 29152adf6da8STheodore Ts'o 29165a916be1STheodore Ts'o static const char *token2str(int token) 29175a916be1STheodore Ts'o { 291897d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29195a916be1STheodore Ts'o 292097d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 292197d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29225a916be1STheodore Ts'o break; 292397d8a670SLukas Czerner return spec->name; 29245a916be1STheodore Ts'o } 29255a916be1STheodore Ts'o 29262adf6da8STheodore Ts'o /* 29272adf6da8STheodore Ts'o * Show an option if 29282adf6da8STheodore Ts'o * - it's set to a non-default value OR 29292adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29302adf6da8STheodore Ts'o */ 293166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 293266acdcf4STheodore Ts'o int nodefs) 29332adf6da8STheodore Ts'o { 29342adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29352adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 2936e3645d72SZhang Yi int def_errors; 29375a916be1STheodore Ts'o const struct mount_opts *m; 293866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29392adf6da8STheodore Ts'o 294066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 294166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29422adf6da8STheodore Ts'o 29432adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29445a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29455a916be1STheodore Ts'o 29465a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29475a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 2948e3645d72SZhang Yi int opt_2 = m->flags & MOPT_2; 2949e3645d72SZhang Yi unsigned int mount_opt, def_mount_opt; 2950e3645d72SZhang Yi 29515a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2952ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29535a916be1STheodore Ts'o continue; 2954e3645d72SZhang Yi 2955e3645d72SZhang Yi if (opt_2) { 2956e3645d72SZhang Yi mount_opt = sbi->s_mount_opt2; 2957e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt2; 2958e3645d72SZhang Yi } else { 2959e3645d72SZhang Yi mount_opt = sbi->s_mount_opt; 2960e3645d72SZhang Yi def_mount_opt = sbi->s_def_mount_opt; 2961e3645d72SZhang Yi } 2962e3645d72SZhang Yi /* skip if same as the default */ 2963e3645d72SZhang Yi if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt))) 2964e3645d72SZhang Yi continue; 2965e3645d72SZhang Yi /* select Opt_noFoo vs Opt_Foo */ 29665a916be1STheodore Ts'o if ((want_set && 2967e3645d72SZhang Yi (mount_opt & m->mount_opt) != m->mount_opt) || 2968e3645d72SZhang Yi (!want_set && (mount_opt & m->mount_opt))) 2969e3645d72SZhang Yi continue; 29705a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29715a916be1STheodore Ts'o } 29725a916be1STheodore Ts'o 297308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29745a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 297508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 297608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 297708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29785a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 297908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 298008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 298166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29825a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29835a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29842adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29855a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29862adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29875a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 298866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29895a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 299066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29915a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 299266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29935a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 299466acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 29955a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 299668afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 2997e3645d72SZhang Yi (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 29982adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29995a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 30002adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 30015a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 30022adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 30035a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 30045a916be1STheodore Ts'o } 300566acdcf4STheodore Ts'o if (nodefs || 300666acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 30075a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 30082adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 30092adf6da8STheodore Ts'o 3010ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 301166acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 30125a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 3013df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 3014df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 30157915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 30167915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 3017ed318a6cSEric Biggers 3018ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 30192adf6da8STheodore Ts'o 30204f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 30214f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 30224f74d15fSEric Biggers 30239cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 30249cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 30259cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 30269cb20f94SIra Weiny else 30279cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30289cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30299cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30309cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30319cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30329cb20f94SIra Weiny } 30333fa5d23eSOjaswin Mujoo 30343fa5d23eSOjaswin Mujoo 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=0"); 30373fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30383fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30393fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 30403fa5d23eSOjaswin Mujoo } 30413fa5d23eSOjaswin Mujoo 30422adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30432adf6da8STheodore Ts'o return 0; 30442adf6da8STheodore Ts'o } 30452adf6da8STheodore Ts'o 304666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 304766acdcf4STheodore Ts'o { 304866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 304966acdcf4STheodore Ts'o } 305066acdcf4STheodore Ts'o 3051ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 305266acdcf4STheodore Ts'o { 305366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 305466acdcf4STheodore Ts'o int rc; 305566acdcf4STheodore Ts'o 3056bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 305766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 305866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 305966acdcf4STheodore Ts'o return rc; 306066acdcf4STheodore Ts'o } 306166acdcf4STheodore Ts'o 3062617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3063ac27a0ecSDave Kleikamp int read_only) 3064ac27a0ecSDave Kleikamp { 3065617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3066c89128a0SJaegeuk Kim int err = 0; 3067ac27a0ecSDave Kleikamp 3068617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3069b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3070b31e1552SEric Sandeen "forcing read-only mode"); 3071c89128a0SJaegeuk Kim err = -EROFS; 30725adaccacSyangerkun goto done; 3073ac27a0ecSDave Kleikamp } 3074ac27a0ecSDave Kleikamp if (read_only) 3075281b5995STheodore Ts'o goto done; 3076617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3077b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3078b31e1552SEric Sandeen "running e2fsck is recommended"); 3079c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3080b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3081b31e1552SEric Sandeen "warning: mounting fs with errors, " 3082b31e1552SEric Sandeen "running e2fsck is recommended"); 3083ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3084ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3085ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3086b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3087b31e1552SEric Sandeen "warning: maximal mount count reached, " 3088b31e1552SEric Sandeen "running e2fsck is recommended"); 3089ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30906a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30916a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3092b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3093b31e1552SEric Sandeen "warning: checktime reached, " 3094b31e1552SEric Sandeen "running e2fsck is recommended"); 30950390131bSFrank Mayhar if (!sbi->s_journal) 3096216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3097ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3098617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3099e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 31006a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 310102f310fcSJan Kara if (sbi->s_journal) { 3102e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 310302f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 310402f310fcSJan Kara ext4_set_feature_orphan_present(sb); 310502f310fcSJan Kara } 3106ac27a0ecSDave Kleikamp 31074392fbc4SJan Kara err = ext4_commit_super(sb); 3108281b5995STheodore Ts'o done: 3109ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3110a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3111a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3112ac27a0ecSDave Kleikamp sb->s_blocksize, 3113ac27a0ecSDave Kleikamp sbi->s_groups_count, 3114617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3115617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3116a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3117c89128a0SJaegeuk Kim return err; 3118ac27a0ecSDave Kleikamp } 3119ac27a0ecSDave Kleikamp 3120117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3121117fff10STheodore Ts'o { 3122117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 31237c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 312437b0b6b8SDan Carpenter int size, i, j; 3125117fff10STheodore Ts'o 3126117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3127117fff10STheodore Ts'o return 0; 3128117fff10STheodore Ts'o 3129117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3130117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3131117fff10STheodore Ts'o return 0; 3132117fff10STheodore Ts'o 31337c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31347c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3135117fff10STheodore Ts'o if (!new_groups) { 31367c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31377c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3138117fff10STheodore Ts'o return -ENOMEM; 3139117fff10STheodore Ts'o } 31407c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31417c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31427c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31437c990728SSuraj Jitindar Singh GFP_KERNEL); 31447c990728SSuraj Jitindar Singh if (!new_groups[i]) { 314537b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 314637b0b6b8SDan Carpenter kvfree(new_groups[j]); 31477c990728SSuraj Jitindar Singh kvfree(new_groups); 31487c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31497c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31507c990728SSuraj Jitindar Singh return -ENOMEM; 3151117fff10STheodore Ts'o } 31527c990728SSuraj Jitindar Singh } 31537c990728SSuraj Jitindar Singh rcu_read_lock(); 31547c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31557c990728SSuraj Jitindar Singh if (old_groups) 31567c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31577c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31587c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31597c990728SSuraj Jitindar Singh rcu_read_unlock(); 31607c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31617c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31627c990728SSuraj Jitindar Singh if (old_groups) 31637c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3164117fff10STheodore Ts'o return 0; 3165117fff10STheodore Ts'o } 3166117fff10STheodore Ts'o 3167772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3168772cb7c8SJose R. Santos { 3169772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3170772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31717c990728SSuraj Jitindar Singh struct flex_groups *fg; 3172772cb7c8SJose R. Santos ext4_group_t flex_group; 3173117fff10STheodore Ts'o int i, err; 3174772cb7c8SJose R. Santos 3175503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3176d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3177772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3178772cb7c8SJose R. Santos return 1; 3179772cb7c8SJose R. Santos } 3180772cb7c8SJose R. Santos 3181117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3182117fff10STheodore Ts'o if (err) 3183772cb7c8SJose R. Santos goto failed; 3184772cb7c8SJose R. Santos 3185772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 318688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3187772cb7c8SJose R. Santos 3188772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31897c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31907c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 319190ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31927c990728SSuraj Jitindar Singh &fg->free_clusters); 31937c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3194772cb7c8SJose R. Santos } 3195772cb7c8SJose R. Santos 3196772cb7c8SJose R. Santos return 1; 3197772cb7c8SJose R. Santos failed: 3198772cb7c8SJose R. Santos return 0; 3199772cb7c8SJose R. Santos } 3200772cb7c8SJose R. Santos 3201e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3202717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3203717d50e4SAndreas Dilger { 3204b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3205717d50e4SAndreas Dilger __u16 crc = 0; 3206717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3207e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3208717d50e4SAndreas Dilger 32099aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3210feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3211feb0ab32SDarrick J. Wong __u32 csum32; 3212b47820edSDaeho Jeong __u16 dummy_csum = 0; 3213feb0ab32SDarrick J. Wong 3214feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3215feb0ab32SDarrick J. Wong sizeof(le_group)); 3216b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3217b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3218b47820edSDaeho Jeong sizeof(dummy_csum)); 3219b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3220b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3221b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3222b47820edSDaeho Jeong sbi->s_desc_size - offset); 3223feb0ab32SDarrick J. Wong 3224feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3225feb0ab32SDarrick J. Wong goto out; 3226feb0ab32SDarrick J. Wong } 3227feb0ab32SDarrick J. Wong 3228feb0ab32SDarrick J. Wong /* old crc16 code */ 3229e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3230813d32f9SDarrick J. Wong return 0; 3231813d32f9SDarrick J. Wong 3232717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3233717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3234717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3235717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3236717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 32374f043518STudor Ambarus if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size) 3238717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 32394f043518STudor Ambarus sbi->s_desc_size - offset); 3240717d50e4SAndreas Dilger 3241feb0ab32SDarrick J. Wong out: 3242717d50e4SAndreas Dilger return cpu_to_le16(crc); 3243717d50e4SAndreas Dilger } 3244717d50e4SAndreas Dilger 3245feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3246717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3247717d50e4SAndreas Dilger { 3248feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3249e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3250717d50e4SAndreas Dilger return 0; 3251717d50e4SAndreas Dilger 3252717d50e4SAndreas Dilger return 1; 3253717d50e4SAndreas Dilger } 3254717d50e4SAndreas Dilger 3255feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3256feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3257feb0ab32SDarrick J. Wong { 3258feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3259feb0ab32SDarrick J. Wong return; 3260e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3261feb0ab32SDarrick J. Wong } 3262feb0ab32SDarrick J. Wong 3263ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3264bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3265829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3266bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3267ac27a0ecSDave Kleikamp { 3268617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3269617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3270617ba13bSMingming Cao ext4_fsblk_t last_block; 327144de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3272bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3273bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3274bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3275ce421581SJose R. Santos int flexbg_flag = 0; 3276bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3277ac27a0ecSDave Kleikamp 3278e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3279ce421581SJose R. Santos flexbg_flag = 1; 3280ce421581SJose R. Santos 3281617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3282ac27a0ecSDave Kleikamp 3283197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3284197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3285197cd65aSAkinobu Mita 3286ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3287bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3288ac27a0ecSDave Kleikamp else 3289ac27a0ecSDave Kleikamp last_block = first_block + 3290617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3291ac27a0ecSDave Kleikamp 3292bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3293bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3294bfff6873SLukas Czerner grp = i; 3295bfff6873SLukas Czerner 32968fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3297829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3298829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3299829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3300829fa70dSTheodore Ts'o "superblock", i); 330118db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 330218db4b4eSTheodore Ts'o return 0; 3303829fa70dSTheodore Ts'o } 330477260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 330577260807STheodore Ts'o block_bitmap <= last_bg_block) { 330677260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 330777260807STheodore Ts'o "Block bitmap for group %u overlaps " 330877260807STheodore Ts'o "block group descriptors", i); 330977260807STheodore Ts'o if (!sb_rdonly(sb)) 331077260807STheodore Ts'o return 0; 331177260807STheodore Ts'o } 33122b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3313b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3314a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3315b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3316ac27a0ecSDave Kleikamp return 0; 3317ac27a0ecSDave Kleikamp } 33188fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3319829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3320829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3321829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3322829fa70dSTheodore Ts'o "superblock", i); 332318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 332418db4b4eSTheodore Ts'o return 0; 3325829fa70dSTheodore Ts'o } 332677260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 332777260807STheodore Ts'o inode_bitmap <= last_bg_block) { 332877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 332977260807STheodore Ts'o "Inode bitmap for group %u overlaps " 333077260807STheodore Ts'o "block group descriptors", i); 333177260807STheodore Ts'o if (!sb_rdonly(sb)) 333277260807STheodore Ts'o return 0; 333377260807STheodore Ts'o } 33342b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3335b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3336a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3337b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3338ac27a0ecSDave Kleikamp return 0; 3339ac27a0ecSDave Kleikamp } 33408fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3341829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3342829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3343829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3344829fa70dSTheodore Ts'o "superblock", i); 334518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 334618db4b4eSTheodore Ts'o return 0; 3347829fa70dSTheodore Ts'o } 334877260807STheodore Ts'o if (inode_table >= sb_block + 1 && 334977260807STheodore Ts'o inode_table <= last_bg_block) { 335077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 335177260807STheodore Ts'o "Inode table for group %u overlaps " 335277260807STheodore Ts'o "block group descriptors", i); 335377260807STheodore Ts'o if (!sb_rdonly(sb)) 335477260807STheodore Ts'o return 0; 335577260807STheodore Ts'o } 3356bd81d8eeSLaurent Vivier if (inode_table < first_block || 33572b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3358b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3359a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3360b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3361ac27a0ecSDave Kleikamp return 0; 3362ac27a0ecSDave Kleikamp } 3363955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3364feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3366b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3367e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3368fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3369bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3370955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3371717d50e4SAndreas Dilger return 0; 3372717d50e4SAndreas Dilger } 33737ee1ec4cSLi Zefan } 3374955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3375ce421581SJose R. Santos if (!flexbg_flag) 3376617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3377ac27a0ecSDave Kleikamp } 3378bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3379bfff6873SLukas Czerner *first_not_zeroed = grp; 3380ac27a0ecSDave Kleikamp return 1; 3381ac27a0ecSDave Kleikamp } 3382ac27a0ecSDave Kleikamp 3383cd2291a4SEric Sandeen /* 3384cd2291a4SEric Sandeen * Maximal extent format file size. 3385cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3386cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3387cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3388cd2291a4SEric Sandeen * so that won't be a limiting factor. 3389cd2291a4SEric Sandeen * 3390f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3391f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3392f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3393f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3394f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3395f17722f9SLukas Czerner * 3396cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3397cd2291a4SEric Sandeen */ 3398f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3399cd2291a4SEric Sandeen { 3400cd2291a4SEric Sandeen loff_t res; 3401cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3402cd2291a4SEric Sandeen 340372deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 340472deb455SChristoph Hellwig 340572deb455SChristoph Hellwig if (!has_huge_files) { 3406cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3407cd2291a4SEric Sandeen 3408cd2291a4SEric Sandeen /* total blocks in file system block size */ 3409cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3410cd2291a4SEric Sandeen upper_limit <<= blkbits; 3411cd2291a4SEric Sandeen } 3412cd2291a4SEric Sandeen 3413f17722f9SLukas Czerner /* 3414f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3415f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3416f17722f9SLukas Czerner * size 3417f17722f9SLukas Czerner */ 3418f17722f9SLukas Czerner res = (1LL << 32) - 1; 3419cd2291a4SEric Sandeen res <<= blkbits; 3420cd2291a4SEric Sandeen 3421cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3422cd2291a4SEric Sandeen if (res > upper_limit) 3423cd2291a4SEric Sandeen res = upper_limit; 3424cd2291a4SEric Sandeen 3425cd2291a4SEric Sandeen return res; 3426cd2291a4SEric Sandeen } 3427ac27a0ecSDave Kleikamp 3428ac27a0ecSDave Kleikamp /* 3429cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34300fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34310fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3432ac27a0ecSDave Kleikamp */ 3433f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3434ac27a0ecSDave Kleikamp { 34355c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34360fc1b451SAneesh Kumar K.V int meta_blocks; 34375c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 343875ca6ad4SRitesh Harjani 343975ca6ad4SRitesh Harjani /* 344075ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34410b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34420b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34430b8e58a1SAndreas Dilger * 34440b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34450b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34460fc1b451SAneesh Kumar K.V */ 344772deb455SChristoph Hellwig if (!has_huge_files) { 34480fc1b451SAneesh Kumar K.V /* 344972deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 345072deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 345172deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34520fc1b451SAneesh Kumar K.V */ 34530fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34540fc1b451SAneesh Kumar K.V 34550fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34560fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34570fc1b451SAneesh Kumar K.V 34580fc1b451SAneesh Kumar K.V } else { 34598180a562SAneesh Kumar K.V /* 34608180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34618180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34628180a562SAneesh Kumar K.V * represent total number of blocks in 34638180a562SAneesh Kumar K.V * file system block size 34648180a562SAneesh Kumar K.V */ 34650fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34660fc1b451SAneesh Kumar K.V 34670fc1b451SAneesh Kumar K.V } 34680fc1b451SAneesh Kumar K.V 34695c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34705c93e8ecSZhang Yi res += ppb; 34715c93e8ecSZhang Yi res += ppb * ppb; 34725c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34735c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34745c93e8ecSZhang Yi meta_blocks = 1; 34755c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34765c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34775c93e8ecSZhang Yi /* Does block tree limit file size? */ 34785c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34795c93e8ecSZhang Yi goto check_lfs; 34805c93e8ecSZhang Yi 34815c93e8ecSZhang Yi res = upper_limit; 34825c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34835c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34840fc1b451SAneesh Kumar K.V /* indirect blocks */ 34850fc1b451SAneesh Kumar K.V meta_blocks = 1; 34865c93e8ecSZhang Yi upper_limit -= ppb; 34870fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34885c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34895c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34905c93e8ecSZhang Yi res -= meta_blocks; 34915c93e8ecSZhang Yi goto check_lfs; 34925c93e8ecSZhang Yi } 34935c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34945c93e8ecSZhang Yi upper_limit -= ppb * ppb; 34955c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 34965c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 34975c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 34985c93e8ecSZhang Yi res -= meta_blocks; 34995c93e8ecSZhang Yi check_lfs: 3500ac27a0ecSDave Kleikamp res <<= bits; 35010fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 35020fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 35030fc1b451SAneesh Kumar K.V 35045c93e8ecSZhang Yi return res; 3505ac27a0ecSDave Kleikamp } 3506ac27a0ecSDave Kleikamp 3507617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 350870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3509ac27a0ecSDave Kleikamp { 3510617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3511fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3512ac27a0ecSDave Kleikamp int has_super = 0; 3513ac27a0ecSDave Kleikamp 3514ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3515ac27a0ecSDave Kleikamp 3516e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 351770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3518ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3519617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3520ac27a0ecSDave Kleikamp has_super = 1; 35210b8e58a1SAndreas Dilger 3522bd63f6b0SDarrick J. Wong /* 3523bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3524bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3525bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3526bd63f6b0SDarrick J. Wong * compensate. 3527bd63f6b0SDarrick J. Wong */ 3528bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 352949598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3530bd63f6b0SDarrick J. Wong has_super++; 3531bd63f6b0SDarrick J. Wong 3532617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3533ac27a0ecSDave Kleikamp } 3534ac27a0ecSDave Kleikamp 3535c9de560dSAlex Tomas /** 3536c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3537c9de560dSAlex Tomas * @sbi: In memory super block info 3538c9de560dSAlex Tomas * 3539c9de560dSAlex Tomas * If we have specified it via mount option, then 3540c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3541c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3542c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3543c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3544c9de560dSAlex Tomas * 3545c9de560dSAlex Tomas */ 3546c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3547c9de560dSAlex Tomas { 3548c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3549c9de560dSAlex Tomas unsigned long stripe_width = 3550c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35513eb08658SDan Ehrenberg int ret; 3552c9de560dSAlex Tomas 3553c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35543eb08658SDan Ehrenberg ret = sbi->s_stripe; 35555469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35563eb08658SDan Ehrenberg ret = stripe_width; 35575469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35583eb08658SDan Ehrenberg ret = stride; 35593eb08658SDan Ehrenberg else 35603eb08658SDan Ehrenberg ret = 0; 3561c9de560dSAlex Tomas 35623eb08658SDan Ehrenberg /* 35633eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35643eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35653eb08658SDan Ehrenberg */ 35663eb08658SDan Ehrenberg if (ret <= 1) 35673eb08658SDan Ehrenberg ret = 0; 3568c9de560dSAlex Tomas 35693eb08658SDan Ehrenberg return ret; 3570c9de560dSAlex Tomas } 3571ac27a0ecSDave Kleikamp 3572a13fb1a4SEric Sandeen /* 3573a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3574a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3575a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3576a13fb1a4SEric Sandeen * 0 if it cannot be. 3577a13fb1a4SEric Sandeen */ 357825c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3579a13fb1a4SEric Sandeen { 3580e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3581a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3582a13fb1a4SEric Sandeen "Couldn't mount because of " 3583a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3584a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3585a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3586a13fb1a4SEric Sandeen return 0; 3587a13fb1a4SEric Sandeen } 3588a13fb1a4SEric Sandeen 35895298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3590c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3591c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3592c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3593c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3594c83ad55eSGabriel Krisman Bertazi return 0; 3595c83ad55eSGabriel Krisman Bertazi } 3596c83ad55eSGabriel Krisman Bertazi #endif 3597c83ad55eSGabriel Krisman Bertazi 3598a13fb1a4SEric Sandeen if (readonly) 3599a13fb1a4SEric Sandeen return 1; 3600a13fb1a4SEric Sandeen 3601e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 36022cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 36031751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 36042cb5cc8bSDarrick J. Wong return 1; 36052cb5cc8bSDarrick J. Wong } 36062cb5cc8bSDarrick J. Wong 3607a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3608e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3609a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3610a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3611a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3612a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3613a13fb1a4SEric Sandeen return 0; 3614a13fb1a4SEric Sandeen } 3615e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3616bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3617bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3618bab08ab9STheodore Ts'o "extents feature\n"); 3619bab08ab9STheodore Ts'o return 0; 3620bab08ab9STheodore Ts'o } 36217c319d32SAditya Kali 36229db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3623d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3624d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 36257c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3626d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3627689c958cSLi Xi return 0; 3628689c958cSLi Xi } 36297c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3630a13fb1a4SEric Sandeen return 1; 3631a13fb1a4SEric Sandeen } 3632a13fb1a4SEric Sandeen 363366e61a9eSTheodore Ts'o /* 363466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 363566e61a9eSTheodore Ts'o * on the file system 363666e61a9eSTheodore Ts'o */ 3637235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 363866e61a9eSTheodore Ts'o { 3639235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3640235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3641235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 364266e61a9eSTheodore Ts'o 364366e61a9eSTheodore Ts'o if (es->s_error_count) 3644ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3645ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 364666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 364766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36486a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36496a0678a7SArnd Bergmann sb->s_id, 36506a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 365166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 365266e61a9eSTheodore Ts'o es->s_first_error_func, 365366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 365466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3655651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 365666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 365766e61a9eSTheodore Ts'o if (es->s_first_error_block) 3658651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 365966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3660651e1c3bSJoe Perches printk(KERN_CONT "\n"); 366166e61a9eSTheodore Ts'o } 366266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36636a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36646a0678a7SArnd Bergmann sb->s_id, 36656a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 366666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 366766e61a9eSTheodore Ts'o es->s_last_error_func, 366866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 366966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3670651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 367166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 367266e61a9eSTheodore Ts'o if (es->s_last_error_block) 3673651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 367466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3675651e1c3bSJoe Perches printk(KERN_CONT "\n"); 367666e61a9eSTheodore Ts'o } 367766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 367866e61a9eSTheodore Ts'o } 367966e61a9eSTheodore Ts'o 3680bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3681bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3682bfff6873SLukas Czerner { 3683bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36843d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36853d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36863d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36873d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3688bfff6873SLukas Czerner int ret = 0; 36894f3d1e45SOjaswin Mujoo int nr = EXT4_SB(sb)->s_mb_prefetch; 369039fec688SShaoying Xu u64 start_time; 3691bfff6873SLukas Czerner 36923d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 36934f3d1e45SOjaswin Mujoo elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios); 36944f3d1e45SOjaswin Mujoo ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr); 36954f3d1e45SOjaswin Mujoo trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr); 36963d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 36973d392b26STheodore Ts'o ret = 1; 36983d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 36993d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 37003d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 37013d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 37023d392b26STheodore Ts'o ret = 0; 37033d392b26STheodore Ts'o } 37043d392b26STheodore Ts'o } 37053d392b26STheodore Ts'o return ret; 37063d392b26STheodore Ts'o } 3707bfff6873SLukas Czerner 37083d392b26STheodore Ts'o for (; group < ngroups; group++) { 3709bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3710bfff6873SLukas Czerner if (!gdp) { 3711bfff6873SLukas Czerner ret = 1; 3712bfff6873SLukas Czerner break; 3713bfff6873SLukas Czerner } 3714bfff6873SLukas Czerner 3715bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3716bfff6873SLukas Czerner break; 3717bfff6873SLukas Czerner } 3718bfff6873SLukas Czerner 37197f511862STheodore Ts'o if (group >= ngroups) 3720bfff6873SLukas Czerner ret = 1; 3721bfff6873SLukas Czerner 3722bfff6873SLukas Czerner if (!ret) { 372339fec688SShaoying Xu start_time = ktime_get_real_ns(); 3724bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3725bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37263d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3727bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 372839fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 372939fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3730bfff6873SLukas Czerner } 3731bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3732bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3733bfff6873SLukas Czerner } 3734bfff6873SLukas Czerner return ret; 3735bfff6873SLukas Czerner } 3736bfff6873SLukas Czerner 3737bfff6873SLukas Czerner /* 3738bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37394ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3740bfff6873SLukas Czerner */ 3741bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3742bfff6873SLukas Czerner { 3743bfff6873SLukas Czerner if (!elr) 3744bfff6873SLukas Czerner return; 3745bfff6873SLukas Czerner 3746bfff6873SLukas Czerner list_del(&elr->lr_request); 37473d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3748bfff6873SLukas Czerner kfree(elr); 3749bfff6873SLukas Czerner } 3750bfff6873SLukas Czerner 3751bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3752bfff6873SLukas Czerner { 37531bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37541bb933fbSLukas Czerner if (!ext4_li_info) { 37551bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3756bfff6873SLukas Czerner return; 37571bb933fbSLukas Czerner } 3758bfff6873SLukas Czerner 3759bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37601bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3761bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37621bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3763bfff6873SLukas Czerner } 3764bfff6873SLukas Czerner 37658f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37668f1f7453SEric Sandeen 3767bfff6873SLukas Czerner /* 3768bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3769bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3770bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3771bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3772bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3773bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3774bfff6873SLukas Czerner * next waking time and put itself into sleep. 3775bfff6873SLukas Czerner */ 3776bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3777bfff6873SLukas Czerner { 3778c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3779bfff6873SLukas Czerner struct list_head *pos, *n; 3780bfff6873SLukas Czerner struct ext4_li_request *elr; 37814ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3782bfff6873SLukas Czerner 3783bfff6873SLukas Czerner BUG_ON(NULL == eli); 37843b575495SLalith Rajendran set_freezable(); 3785bfff6873SLukas Czerner 3786bfff6873SLukas Czerner cont_thread: 3787bfff6873SLukas Czerner while (true) { 3788bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3789bfff6873SLukas Czerner 3790bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3791bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3792bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3793bfff6873SLukas Czerner goto exit_thread; 3794bfff6873SLukas Czerner } 3795bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3796e22834f0SDmitry Monakhov int err = 0; 3797e22834f0SDmitry Monakhov int progress = 0; 3798bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3799bfff6873SLukas Czerner lr_request); 3800bfff6873SLukas Czerner 3801e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3802e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3803e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3804e22834f0SDmitry Monakhov continue; 3805e22834f0SDmitry Monakhov } 3806e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3807e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3808e22834f0SDmitry Monakhov progress = 1; 3809e22834f0SDmitry Monakhov /* 3810e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3811e22834f0SDmitry Monakhov * be removed from the list, it is 3812e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3813e22834f0SDmitry Monakhov */ 3814e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3815e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3816e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3817e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3818e22834f0SDmitry Monakhov n = pos->next; 3819e22834f0SDmitry Monakhov } 3820e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3821e22834f0SDmitry Monakhov } 3822b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3823e22834f0SDmitry Monakhov if (err) { 3824bfff6873SLukas Czerner ext4_remove_li_request(elr); 3825bfff6873SLukas Czerner continue; 3826bfff6873SLukas Czerner } 3827e22834f0SDmitry Monakhov if (!progress) { 3828e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 38298032bf12SJason A. Donenfeld get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3830b2c78cd0STheodore Ts'o } 3831bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3832bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3833bfff6873SLukas Czerner } 3834bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3835bfff6873SLukas Czerner 3836a0acae0eSTejun Heo try_to_freeze(); 3837bfff6873SLukas Czerner 38384ed5c033SLukas Czerner cur = jiffies; 38394ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3840f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3841bfff6873SLukas Czerner cond_resched(); 3842bfff6873SLukas Czerner continue; 3843bfff6873SLukas Czerner } 3844bfff6873SLukas Czerner 38454ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38464ed5c033SLukas Czerner 38478f1f7453SEric Sandeen if (kthread_should_stop()) { 38488f1f7453SEric Sandeen ext4_clear_request_list(); 38498f1f7453SEric Sandeen goto exit_thread; 38508f1f7453SEric Sandeen } 3851bfff6873SLukas Czerner } 3852bfff6873SLukas Czerner 3853bfff6873SLukas Czerner exit_thread: 3854bfff6873SLukas Czerner /* 3855bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3856bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3857bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3858bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3859bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3860bfff6873SLukas Czerner * new one. 3861bfff6873SLukas Czerner */ 3862bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3863bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3864bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3865bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3866bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3867bfff6873SLukas Czerner goto cont_thread; 3868bfff6873SLukas Czerner } 3869bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3870bfff6873SLukas Czerner kfree(ext4_li_info); 3871bfff6873SLukas Czerner ext4_li_info = NULL; 3872bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3873bfff6873SLukas Czerner 3874bfff6873SLukas Czerner return 0; 3875bfff6873SLukas Czerner } 3876bfff6873SLukas Czerner 3877bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3878bfff6873SLukas Czerner { 3879bfff6873SLukas Czerner struct list_head *pos, *n; 3880bfff6873SLukas Czerner struct ext4_li_request *elr; 3881bfff6873SLukas Czerner 3882bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3883bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3884bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3885bfff6873SLukas Czerner lr_request); 3886bfff6873SLukas Czerner ext4_remove_li_request(elr); 3887bfff6873SLukas Czerner } 3888bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3889bfff6873SLukas Czerner } 3890bfff6873SLukas Czerner 3891bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3892bfff6873SLukas Czerner { 38938f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 38948f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 38958f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 38968f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3897bfff6873SLukas Czerner ext4_clear_request_list(); 3898bfff6873SLukas Czerner kfree(ext4_li_info); 3899bfff6873SLukas Czerner ext4_li_info = NULL; 390092b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3901bfff6873SLukas Czerner "initialization thread\n", 3902bfff6873SLukas Czerner err); 3903bfff6873SLukas Czerner return err; 3904bfff6873SLukas Czerner } 3905bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3906bfff6873SLukas Czerner return 0; 3907bfff6873SLukas Czerner } 3908bfff6873SLukas Czerner 3909bfff6873SLukas Czerner /* 3910bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3911bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3912bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3913bfff6873SLukas Czerner * groups and return total number of groups. 3914bfff6873SLukas Czerner */ 3915bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3916bfff6873SLukas Czerner { 3917bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3918bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3919bfff6873SLukas Czerner 39208844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 39218844618dSTheodore Ts'o return ngroups; 39228844618dSTheodore Ts'o 3923bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3924bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3925bfff6873SLukas Czerner if (!gdp) 3926bfff6873SLukas Czerner continue; 3927bfff6873SLukas Czerner 392850122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3929bfff6873SLukas Czerner break; 3930bfff6873SLukas Czerner } 3931bfff6873SLukas Czerner 3932bfff6873SLukas Czerner return group; 3933bfff6873SLukas Czerner } 3934bfff6873SLukas Czerner 3935bfff6873SLukas Czerner static int ext4_li_info_new(void) 3936bfff6873SLukas Czerner { 3937bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3938bfff6873SLukas Czerner 3939bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3940bfff6873SLukas Czerner if (!eli) 3941bfff6873SLukas Czerner return -ENOMEM; 3942bfff6873SLukas Czerner 3943bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3944bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3945bfff6873SLukas Czerner 3946bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3947bfff6873SLukas Czerner 3948bfff6873SLukas Czerner ext4_li_info = eli; 3949bfff6873SLukas Czerner 3950bfff6873SLukas Czerner return 0; 3951bfff6873SLukas Czerner } 3952bfff6873SLukas Czerner 3953bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3954bfff6873SLukas Czerner ext4_group_t start) 3955bfff6873SLukas Czerner { 3956bfff6873SLukas Czerner struct ext4_li_request *elr; 3957bfff6873SLukas Czerner 3958bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3959bfff6873SLukas Czerner if (!elr) 3960bfff6873SLukas Czerner return NULL; 3961bfff6873SLukas Czerner 3962bfff6873SLukas Czerner elr->lr_super = sb; 39633d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 396421175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39653d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3966bfff6873SLukas Czerner elr->lr_next_group = start; 396721175ca4SHarshad Shirwadkar } else { 396821175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39693d392b26STheodore Ts'o } 3970bfff6873SLukas Czerner 3971bfff6873SLukas Czerner /* 3972bfff6873SLukas Czerner * Randomize first schedule time of the request to 3973bfff6873SLukas Czerner * spread the inode table initialization requests 3974bfff6873SLukas Czerner * better. 3975bfff6873SLukas Czerner */ 39768032bf12SJason A. Donenfeld elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); 3977bfff6873SLukas Czerner return elr; 3978bfff6873SLukas Czerner } 3979bfff6873SLukas Czerner 39807f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3981bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3982bfff6873SLukas Czerner { 3983bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39847f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 398549598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39866c5a6cb9SAndrew Morton int ret = 0; 3987bfff6873SLukas Czerner 39887f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 398951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 399051ce6511SLukas Czerner /* 399151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 399251ce6511SLukas Czerner * s_li_wait_mult might have changed. 399351ce6511SLukas Czerner */ 399451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 39957f511862STheodore Ts'o goto out; 399651ce6511SLukas Czerner } 3997bfff6873SLukas Czerner 3998426d15adSJosh Triplett if (sb_rdonly(sb) || 3999426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 4000426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 40017f511862STheodore Ts'o goto out; 4002bfff6873SLukas Czerner 4003bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 40047f511862STheodore Ts'o if (!elr) { 40057f511862STheodore Ts'o ret = -ENOMEM; 40067f511862STheodore Ts'o goto out; 40077f511862STheodore Ts'o } 4008bfff6873SLukas Czerner 4009bfff6873SLukas Czerner if (NULL == ext4_li_info) { 4010bfff6873SLukas Czerner ret = ext4_li_info_new(); 4011bfff6873SLukas Czerner if (ret) 4012bfff6873SLukas Czerner goto out; 4013bfff6873SLukas Czerner } 4014bfff6873SLukas Czerner 4015bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 4016bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 4017bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 4018bfff6873SLukas Czerner 4019bfff6873SLukas Czerner sbi->s_li_request = elr; 402046e4690bSTao Ma /* 402146e4690bSTao Ma * set elr to NULL here since it has been inserted to 402246e4690bSTao Ma * the request_list and the removal and free of it is 402346e4690bSTao Ma * handled by ext4_clear_request_list from now on. 402446e4690bSTao Ma */ 402546e4690bSTao Ma elr = NULL; 4026bfff6873SLukas Czerner 4027bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4028bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4029bfff6873SLukas Czerner if (ret) 4030bfff6873SLukas Czerner goto out; 4031bfff6873SLukas Czerner } 4032bfff6873SLukas Czerner out: 4033bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4034beed5ecbSNicolas Kaiser if (ret) 4035bfff6873SLukas Czerner kfree(elr); 4036bfff6873SLukas Czerner return ret; 4037bfff6873SLukas Czerner } 4038bfff6873SLukas Czerner 4039bfff6873SLukas Czerner /* 4040bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4041bfff6873SLukas Czerner * module unload. 4042bfff6873SLukas Czerner */ 4043bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4044bfff6873SLukas Czerner { 4045bfff6873SLukas Czerner /* 4046bfff6873SLukas Czerner * If thread exited earlier 4047bfff6873SLukas Czerner * there's nothing to be done. 4048bfff6873SLukas Czerner */ 40498f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4050bfff6873SLukas Czerner return; 4051bfff6873SLukas Czerner 40528f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4053bfff6873SLukas Czerner } 4054bfff6873SLukas Czerner 405525ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 405625ed6e8aSDarrick J. Wong { 405725ed6e8aSDarrick J. Wong int ret = 1; 405825ed6e8aSDarrick J. Wong int compat, incompat; 405925ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 406025ed6e8aSDarrick J. Wong 40619aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4062db9ee220SDarrick J. Wong /* journal checksum v3 */ 406325ed6e8aSDarrick J. Wong compat = 0; 4064db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 406525ed6e8aSDarrick J. Wong } else { 406625ed6e8aSDarrick J. Wong /* journal checksum v1 */ 406725ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 406825ed6e8aSDarrick J. Wong incompat = 0; 406925ed6e8aSDarrick J. Wong } 407025ed6e8aSDarrick J. Wong 4071feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4072feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4073feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4074feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 407525ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 407625ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 407725ed6e8aSDarrick J. Wong compat, 0, 407825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 407925ed6e8aSDarrick J. Wong incompat); 408025ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 408125ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 408225ed6e8aSDarrick J. Wong compat, 0, 408325ed6e8aSDarrick J. Wong incompat); 408425ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 408525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 408625ed6e8aSDarrick J. Wong } else { 4087feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4088feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 408925ed6e8aSDarrick J. Wong } 409025ed6e8aSDarrick J. Wong 409125ed6e8aSDarrick J. Wong return ret; 409225ed6e8aSDarrick J. Wong } 409325ed6e8aSDarrick J. Wong 4094952fc18eSTheodore Ts'o /* 4095952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4096952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4097952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4098952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4099952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4100952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4101952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4102952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4103952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4104952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4105952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4106952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4107952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4108952fc18eSTheodore Ts'o */ 4109952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4110952fc18eSTheodore Ts'o char *buf) 4111952fc18eSTheodore Ts'o { 4112952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4113952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4114952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4115952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4116952fc18eSTheodore Ts'o int s, j, count = 0; 411710b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4118952fc18eSTheodore Ts'o 4119e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 412010b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 412110b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41220548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41230548bbb8STheodore Ts'o 4124952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4125952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4126952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4127952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4128952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4129952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4130952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4131952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4132952fc18eSTheodore Ts'o count++; 4133952fc18eSTheodore Ts'o } 4134952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4135952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4136952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4137952fc18eSTheodore Ts'o count++; 4138952fc18eSTheodore Ts'o } 4139952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4140952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4141952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4142952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4143952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4144952fc18eSTheodore Ts'o count++; 4145952fc18eSTheodore Ts'o } 4146952fc18eSTheodore Ts'o if (i != grp) 4147952fc18eSTheodore Ts'o continue; 4148952fc18eSTheodore Ts'o s = 0; 4149952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4150952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4151952fc18eSTheodore Ts'o count++; 4152952fc18eSTheodore Ts'o } 4153c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4154c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4155c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4156c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4157c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4158952fc18eSTheodore Ts'o } 4159c48ae41bSTheodore Ts'o count += j; 4160c48ae41bSTheodore Ts'o for (; j > 0; j--) 4161c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4162952fc18eSTheodore Ts'o } 4163952fc18eSTheodore Ts'o if (!count) 4164952fc18eSTheodore Ts'o return 0; 4165952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4166952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4167952fc18eSTheodore Ts'o } 4168952fc18eSTheodore Ts'o 4169952fc18eSTheodore Ts'o /* 4170952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4171952fc18eSTheodore Ts'o */ 4172952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4173952fc18eSTheodore Ts'o { 4174952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4175952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41763c816dedSEric Whitney struct inode *j_inode; 41773c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4178952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4179952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41804fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4181952fc18eSTheodore Ts'o 4182952fc18eSTheodore Ts'o if (!buf) 4183952fc18eSTheodore Ts'o return -ENOMEM; 4184952fc18eSTheodore Ts'o 4185952fc18eSTheodore Ts'o /* 4186952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4187952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4188952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4189952fc18eSTheodore Ts'o */ 4190952fc18eSTheodore Ts'o 4191952fc18eSTheodore Ts'o /* 4192952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4193952fc18eSTheodore Ts'o */ 4194952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4195952fc18eSTheodore Ts'o 4196952fc18eSTheodore Ts'o /* 4197952fc18eSTheodore Ts'o * Add the overhead found in each block group 4198952fc18eSTheodore Ts'o */ 4199952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4200952fc18eSTheodore Ts'o int blks; 4201952fc18eSTheodore Ts'o 4202952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4203952fc18eSTheodore Ts'o overhead += blks; 4204952fc18eSTheodore Ts'o if (blks) 4205952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4206952fc18eSTheodore Ts'o cond_resched(); 4207952fc18eSTheodore Ts'o } 42083c816dedSEric Whitney 42093c816dedSEric Whitney /* 42103c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 42113c816dedSEric Whitney * loaded or not 42123c816dedSEric Whitney */ 421361ead714SChristian Brauner if (sbi->s_journal && !sbi->s_journal_bdev_file) 4214ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4215f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4216f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 42173c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 4218ee5c8071SZhang Yi if (!IS_ERR(j_inode)) { 42193c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 42203c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42213c816dedSEric Whitney iput(j_inode); 42223c816dedSEric Whitney } else { 42233c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42243c816dedSEric Whitney } 42253c816dedSEric Whitney } 4226952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4227952fc18eSTheodore Ts'o smp_wmb(); 4228952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4229952fc18eSTheodore Ts'o return 0; 4230952fc18eSTheodore Ts'o } 4231952fc18eSTheodore Ts'o 4232b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 423327dd4385SLukas Czerner { 423427dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4235b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 423627dd4385SLukas Czerner 423727dd4385SLukas Czerner /* 423830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 423930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 424030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 424130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 424230fac0f7SJan Kara */ 4243e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4244b5799018STheodore Ts'o return; 424530fac0f7SJan Kara /* 424627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 424727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 424827dd4385SLukas Czerner * out of space like for example punch hole, or converting 4249556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 425027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 425127dd4385SLukas Czerner * very rare. 425227dd4385SLukas Czerner */ 4253b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4254b5799018STheodore Ts'o sbi->s_cluster_bits); 425527dd4385SLukas Czerner 425627dd4385SLukas Czerner do_div(resv_clusters, 50); 425727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 425827dd4385SLukas Czerner 4259b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 426027dd4385SLukas Czerner } 426127dd4385SLukas Czerner 4262ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4263ca9b404fSRoman Anufriev { 4264ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4265ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4266ca9b404fSRoman Anufriev return "none"; 4267ca9b404fSRoman Anufriev 4268ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4269ca9b404fSRoman Anufriev return "journalled"; 4270ca9b404fSRoman Anufriev else 4271ca9b404fSRoman Anufriev return "writeback"; 4272ca9b404fSRoman Anufriev #else 4273ca9b404fSRoman Anufriev return "disabled"; 4274ca9b404fSRoman Anufriev #endif 4275ca9b404fSRoman Anufriev } 4276ca9b404fSRoman Anufriev 4277188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4278188c299eSJan Kara enum ext4_journal_trigger_type type, 4279188c299eSJan Kara void (*trigger)( 4280188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4281188c299eSJan Kara struct buffer_head *bh, 4282188c299eSJan Kara void *mapped_data, 4283188c299eSJan Kara size_t size)) 4284188c299eSJan Kara { 4285188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4286188c299eSJan Kara 4287188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4288188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4289188c299eSJan Kara } 4290188c299eSJan Kara 42917edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4292ac27a0ecSDave Kleikamp { 42937edfd85bSLukas Czerner if (!sbi) 42947edfd85bSLukas Czerner return; 42957edfd85bSLukas Czerner 42967edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 42978012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42987edfd85bSLukas Czerner kfree(sbi); 42997edfd85bSLukas Czerner } 43007edfd85bSLukas Czerner 43017edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 43027edfd85bSLukas Czerner { 43037edfd85bSLukas Czerner struct ext4_sb_info *sbi; 43047edfd85bSLukas Czerner 43057edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 43067edfd85bSLukas Czerner if (!sbi) 43077edfd85bSLukas Czerner return NULL; 43087edfd85bSLukas Czerner 43098012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 43108012b866SShiyang Ruan NULL, NULL); 43117edfd85bSLukas Czerner 43127edfd85bSLukas Czerner sbi->s_blockgroup_lock = 43137edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 43147edfd85bSLukas Czerner 43157edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 43167edfd85bSLukas Czerner goto err_out; 43177edfd85bSLukas Czerner 43187edfd85bSLukas Czerner sb->s_fs_info = sbi; 43197edfd85bSLukas Czerner sbi->s_sb = sb; 43207edfd85bSLukas Czerner return sbi; 43217edfd85bSLukas Czerner err_out: 43228012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43237edfd85bSLukas Czerner kfree(sbi); 43247edfd85bSLukas Czerner return NULL; 43257edfd85bSLukas Czerner } 43267edfd85bSLukas Czerner 43275f6d662dSJason Yan static void ext4_set_def_opts(struct super_block *sb, 43285f6d662dSJason Yan struct ext4_super_block *es) 43295f6d662dSJason Yan { 43305f6d662dSJason Yan unsigned long def_mount_opts; 43315f6d662dSJason Yan 43325f6d662dSJason Yan /* Set defaults before we parse the mount options */ 43335f6d662dSJason Yan def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 43345f6d662dSJason Yan set_opt(sb, INIT_INODE_TABLE); 43355f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DEBUG) 43365f6d662dSJason Yan set_opt(sb, DEBUG); 43375f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 43385f6d662dSJason Yan set_opt(sb, GRPID); 43395f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_UID16) 43405f6d662dSJason Yan set_opt(sb, NO_UID32); 43415f6d662dSJason Yan /* xattr user namespace & acls are now defaulted on */ 43425f6d662dSJason Yan set_opt(sb, XATTR_USER); 43435f6d662dSJason Yan #ifdef CONFIG_EXT4_FS_POSIX_ACL 43445f6d662dSJason Yan set_opt(sb, POSIX_ACL); 43455f6d662dSJason Yan #endif 43465f6d662dSJason Yan if (ext4_has_feature_fast_commit(sb)) 43475f6d662dSJason Yan set_opt2(sb, JOURNAL_FAST_COMMIT); 43485f6d662dSJason Yan /* don't forget to enable journal_csum when metadata_csum is enabled. */ 43495f6d662dSJason Yan if (ext4_has_metadata_csum(sb)) 43505f6d662dSJason Yan set_opt(sb, JOURNAL_CHECKSUM); 43515f6d662dSJason Yan 43525f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 43535f6d662dSJason Yan set_opt(sb, JOURNAL_DATA); 43545f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 43555f6d662dSJason Yan set_opt(sb, ORDERED_DATA); 43565f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 43575f6d662dSJason Yan set_opt(sb, WRITEBACK_DATA); 43585f6d662dSJason Yan 43595f6d662dSJason Yan if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) 43605f6d662dSJason Yan set_opt(sb, ERRORS_PANIC); 43615f6d662dSJason Yan else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) 43625f6d662dSJason Yan set_opt(sb, ERRORS_CONT); 43635f6d662dSJason Yan else 43645f6d662dSJason Yan set_opt(sb, ERRORS_RO); 43655f6d662dSJason Yan /* block_validity enabled by default; disable with noblock_validity */ 43665f6d662dSJason Yan set_opt(sb, BLOCK_VALIDITY); 43675f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DISCARD) 43685f6d662dSJason Yan set_opt(sb, DISCARD); 43695f6d662dSJason Yan 43705f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 43715f6d662dSJason Yan set_opt(sb, BARRIER); 43725f6d662dSJason Yan 43735f6d662dSJason Yan /* 43745f6d662dSJason Yan * enable delayed allocation by default 43755f6d662dSJason Yan * Use -o nodelalloc to turn it off 43765f6d662dSJason Yan */ 43775f6d662dSJason Yan if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 43785f6d662dSJason Yan ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 43795f6d662dSJason Yan set_opt(sb, DELALLOC); 43803df11e27SJason Yan 4381e89fdcc4SOjaswin Mujoo if (sb->s_blocksize <= PAGE_SIZE) 43823df11e27SJason Yan set_opt(sb, DIOREAD_NOLOCK); 43835f6d662dSJason Yan } 43845f6d662dSJason Yan 4385c8267c51SJason Yan static int ext4_handle_clustersize(struct super_block *sb) 43864a8557b0SJason Yan { 43874a8557b0SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 43884a8557b0SJason Yan struct ext4_super_block *es = sbi->s_es; 43894a8557b0SJason Yan int clustersize; 43904a8557b0SJason Yan 43914a8557b0SJason Yan /* Handle clustersize */ 43924a8557b0SJason Yan clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 43934a8557b0SJason Yan if (ext4_has_feature_bigalloc(sb)) { 4394c8267c51SJason Yan if (clustersize < sb->s_blocksize) { 43954a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43964a8557b0SJason Yan "cluster size (%d) smaller than " 4397c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 43984a8557b0SJason Yan return -EINVAL; 43994a8557b0SJason Yan } 44004a8557b0SJason Yan sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 44014a8557b0SJason Yan le32_to_cpu(es->s_log_block_size); 44024a8557b0SJason Yan } else { 4403c8267c51SJason Yan if (clustersize != sb->s_blocksize) { 44044a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44054a8557b0SJason Yan "fragment/cluster size (%d) != " 4406c8267c51SJason Yan "block size (%lu)", clustersize, sb->s_blocksize); 44074a8557b0SJason Yan return -EINVAL; 44084a8557b0SJason Yan } 4409c8267c51SJason Yan if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { 44104a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 44114a8557b0SJason Yan "#blocks per group too big: %lu", 44124a8557b0SJason Yan sbi->s_blocks_per_group); 44134a8557b0SJason Yan return -EINVAL; 44144a8557b0SJason Yan } 44154a8557b0SJason Yan sbi->s_cluster_bits = 0; 44164a8557b0SJason Yan } 441740da553fSJan Kara sbi->s_clusters_per_group = le32_to_cpu(es->s_clusters_per_group); 441840da553fSJan Kara if (sbi->s_clusters_per_group > sb->s_blocksize * 8) { 441940da553fSJan Kara ext4_msg(sb, KERN_ERR, "#clusters per group too big: %lu", 442040da553fSJan Kara sbi->s_clusters_per_group); 442140da553fSJan Kara return -EINVAL; 442240da553fSJan Kara } 442340da553fSJan Kara if (sbi->s_blocks_per_group != 442440da553fSJan Kara (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) { 442540da553fSJan Kara ext4_msg(sb, KERN_ERR, 442640da553fSJan Kara "blocks per group (%lu) and clusters per group (%lu) inconsistent", 442740da553fSJan Kara sbi->s_blocks_per_group, sbi->s_clusters_per_group); 442840da553fSJan Kara return -EINVAL; 442940da553fSJan Kara } 4430c8267c51SJason Yan sbi->s_cluster_ratio = clustersize / sb->s_blocksize; 44314a8557b0SJason Yan 44324a8557b0SJason Yan /* Do we have standard group size of clustersize * 8 blocks ? */ 44334a8557b0SJason Yan if (sbi->s_blocks_per_group == clustersize << 3) 44344a8557b0SJason Yan set_opt2(sb, STD_GROUP_SIZE); 44354a8557b0SJason Yan 44364a8557b0SJason Yan return 0; 44374a8557b0SJason Yan } 44384a8557b0SJason Yan 4439f7314a67SJason Yan static void ext4_fast_commit_init(struct super_block *sb) 4440f7314a67SJason Yan { 4441f7314a67SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4442f7314a67SJason Yan 4443f7314a67SJason Yan /* Initialize fast commit stuff */ 4444f7314a67SJason Yan atomic_set(&sbi->s_fc_subtid, 0); 4445f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4446f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4447f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4448f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4449f7314a67SJason Yan sbi->s_fc_bytes = 0; 4450f7314a67SJason Yan ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 4451f7314a67SJason Yan sbi->s_fc_ineligible_tid = 0; 4452f7314a67SJason Yan spin_lock_init(&sbi->s_fc_lock); 4453f7314a67SJason Yan memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 4454f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions = NULL; 4455f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_size = 0; 4456f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_used = 0; 4457f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_valid = 0; 4458f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes = NULL; 4459f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 4460f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4461f7314a67SJason Yan } 4462f7314a67SJason Yan 44630e495f7cSJason Yan static int ext4_inode_info_init(struct super_block *sb, 4464c8267c51SJason Yan struct ext4_super_block *es) 44650e495f7cSJason Yan { 44660e495f7cSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44670e495f7cSJason Yan 44680e495f7cSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44690e495f7cSJason Yan sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44700e495f7cSJason Yan sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44710e495f7cSJason Yan } else { 44720e495f7cSJason Yan sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44730e495f7cSJason Yan sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 44740e495f7cSJason Yan if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 44750e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 44760e495f7cSJason Yan sbi->s_first_ino); 44770e495f7cSJason Yan return -EINVAL; 44780e495f7cSJason Yan } 44790e495f7cSJason Yan if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 44800e495f7cSJason Yan (!is_power_of_2(sbi->s_inode_size)) || 4481c8267c51SJason Yan (sbi->s_inode_size > sb->s_blocksize)) { 44820e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44830e495f7cSJason Yan "unsupported inode size: %d", 44840e495f7cSJason Yan sbi->s_inode_size); 4485c8267c51SJason Yan ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize); 44860e495f7cSJason Yan return -EINVAL; 44870e495f7cSJason Yan } 44880e495f7cSJason Yan /* 44890e495f7cSJason Yan * i_atime_extra is the last extra field available for 44900e495f7cSJason Yan * [acm]times in struct ext4_inode. Checking for that 44910e495f7cSJason Yan * field should suffice to ensure we have extra space 44920e495f7cSJason Yan * for all three. 44930e495f7cSJason Yan */ 44940e495f7cSJason Yan if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 44950e495f7cSJason Yan sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 44960e495f7cSJason Yan sb->s_time_gran = 1; 44970e495f7cSJason Yan sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 44980e495f7cSJason Yan } else { 44990e495f7cSJason Yan sb->s_time_gran = NSEC_PER_SEC; 45000e495f7cSJason Yan sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45010e495f7cSJason Yan } 45020e495f7cSJason Yan sb->s_time_min = EXT4_TIMESTAMP_MIN; 45030e495f7cSJason Yan } 45040e495f7cSJason Yan 45050e495f7cSJason Yan if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45060e495f7cSJason Yan sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45070e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE; 45080e495f7cSJason Yan if (ext4_has_feature_extra_isize(sb)) { 45090e495f7cSJason Yan unsigned v, max = (sbi->s_inode_size - 45100e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE); 45110e495f7cSJason Yan 45120e495f7cSJason Yan v = le16_to_cpu(es->s_want_extra_isize); 45130e495f7cSJason Yan if (v > max) { 45140e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45150e495f7cSJason Yan "bad s_want_extra_isize: %d", v); 45160e495f7cSJason Yan return -EINVAL; 45170e495f7cSJason Yan } 45180e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45190e495f7cSJason Yan sbi->s_want_extra_isize = v; 45200e495f7cSJason Yan 45210e495f7cSJason Yan v = le16_to_cpu(es->s_min_extra_isize); 45220e495f7cSJason Yan if (v > max) { 45230e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 45240e495f7cSJason Yan "bad s_min_extra_isize: %d", v); 45250e495f7cSJason Yan return -EINVAL; 45260e495f7cSJason Yan } 45270e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 45280e495f7cSJason Yan sbi->s_want_extra_isize = v; 45290e495f7cSJason Yan } 45300e495f7cSJason Yan } 45310e495f7cSJason Yan 45320e495f7cSJason Yan return 0; 45330e495f7cSJason Yan } 45340e495f7cSJason Yan 453539c135b0SJason Yan #if IS_ENABLED(CONFIG_UNICODE) 453639c135b0SJason Yan static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 453739c135b0SJason Yan { 453839c135b0SJason Yan const struct ext4_sb_encodings *encoding_info; 453939c135b0SJason Yan struct unicode_map *encoding; 454039c135b0SJason Yan __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 454139c135b0SJason Yan 454239c135b0SJason Yan if (!ext4_has_feature_casefold(sb) || sb->s_encoding) 454339c135b0SJason Yan return 0; 454439c135b0SJason Yan 454539c135b0SJason Yan encoding_info = ext4_sb_read_encoding(es); 454639c135b0SJason Yan if (!encoding_info) { 454739c135b0SJason Yan ext4_msg(sb, KERN_ERR, 454839c135b0SJason Yan "Encoding requested by superblock is unknown"); 454939c135b0SJason Yan return -EINVAL; 455039c135b0SJason Yan } 455139c135b0SJason Yan 455239c135b0SJason Yan encoding = utf8_load(encoding_info->version); 455339c135b0SJason Yan if (IS_ERR(encoding)) { 455439c135b0SJason Yan ext4_msg(sb, KERN_ERR, 455539c135b0SJason Yan "can't mount with superblock charset: %s-%u.%u.%u " 455639c135b0SJason Yan "not supported by the kernel. flags: 0x%x.", 455739c135b0SJason Yan encoding_info->name, 455839c135b0SJason Yan unicode_major(encoding_info->version), 455939c135b0SJason Yan unicode_minor(encoding_info->version), 456039c135b0SJason Yan unicode_rev(encoding_info->version), 456139c135b0SJason Yan encoding_flags); 456239c135b0SJason Yan return -EINVAL; 456339c135b0SJason Yan } 456439c135b0SJason Yan ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 456539c135b0SJason Yan "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 456639c135b0SJason Yan unicode_major(encoding_info->version), 456739c135b0SJason Yan unicode_minor(encoding_info->version), 456839c135b0SJason Yan unicode_rev(encoding_info->version), 456939c135b0SJason Yan encoding_flags); 457039c135b0SJason Yan 457139c135b0SJason Yan sb->s_encoding = encoding; 457239c135b0SJason Yan sb->s_encoding_flags = encoding_flags; 457339c135b0SJason Yan 457439c135b0SJason Yan return 0; 457539c135b0SJason Yan } 457639c135b0SJason Yan #else 457739c135b0SJason Yan static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 457839c135b0SJason Yan { 457939c135b0SJason Yan return 0; 458039c135b0SJason Yan } 458139c135b0SJason Yan #endif 458239c135b0SJason Yan 4583b26458d1SJason Yan static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) 4584b26458d1SJason Yan { 4585b26458d1SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4586b26458d1SJason Yan 4587b26458d1SJason Yan /* Warn if metadata_csum and gdt_csum are both set. */ 4588b26458d1SJason Yan if (ext4_has_feature_metadata_csum(sb) && 4589b26458d1SJason Yan ext4_has_feature_gdt_csum(sb)) 4590b26458d1SJason Yan ext4_warning(sb, "metadata_csum and uninit_bg are " 4591b26458d1SJason Yan "redundant flags; please run fsck."); 4592b26458d1SJason Yan 4593b26458d1SJason Yan /* Check for a known checksum algorithm */ 4594b26458d1SJason Yan if (!ext4_verify_csum_type(sb, es)) { 4595b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4596b26458d1SJason Yan "unknown checksum algorithm."); 4597b26458d1SJason Yan return -EINVAL; 4598b26458d1SJason Yan } 4599b26458d1SJason Yan ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 4600b26458d1SJason Yan ext4_orphan_file_block_trigger); 4601b26458d1SJason Yan 4602b26458d1SJason Yan /* Load the checksum driver */ 4603b26458d1SJason Yan sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 4604b26458d1SJason Yan if (IS_ERR(sbi->s_chksum_driver)) { 4605b26458d1SJason Yan int ret = PTR_ERR(sbi->s_chksum_driver); 4606b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 4607b26458d1SJason Yan sbi->s_chksum_driver = NULL; 4608b26458d1SJason Yan return ret; 4609b26458d1SJason Yan } 4610b26458d1SJason Yan 4611b26458d1SJason Yan /* Check superblock checksum */ 4612b26458d1SJason Yan if (!ext4_superblock_csum_verify(sb, es)) { 4613b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4614b26458d1SJason Yan "invalid superblock checksum. Run e2fsck?"); 4615b26458d1SJason Yan return -EFSBADCRC; 4616b26458d1SJason Yan } 4617b26458d1SJason Yan 4618b26458d1SJason Yan /* Precompute checksum seed for all metadata */ 4619b26458d1SJason Yan if (ext4_has_feature_csum_seed(sb)) 4620b26458d1SJason Yan sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4621b26458d1SJason Yan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4622b26458d1SJason Yan sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4623b26458d1SJason Yan sizeof(es->s_uuid)); 4624b26458d1SJason Yan return 0; 4625b26458d1SJason Yan } 4626b26458d1SJason Yan 4627d7f3542bSJason Yan static int ext4_check_feature_compatibility(struct super_block *sb, 4628d7f3542bSJason Yan struct ext4_super_block *es, 4629d7f3542bSJason Yan int silent) 4630d7f3542bSJason Yan { 463154902099SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 463254902099SJason Yan 4633d7f3542bSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4634d7f3542bSJason Yan (ext4_has_compat_features(sb) || 4635d7f3542bSJason Yan ext4_has_ro_compat_features(sb) || 4636d7f3542bSJason Yan ext4_has_incompat_features(sb))) 4637d7f3542bSJason Yan ext4_msg(sb, KERN_WARNING, 4638d7f3542bSJason Yan "feature flags set on rev 0 fs, " 4639d7f3542bSJason Yan "running e2fsck is recommended"); 4640d7f3542bSJason Yan 4641d7f3542bSJason Yan if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4642d7f3542bSJason Yan set_opt2(sb, HURD_COMPAT); 4643d7f3542bSJason Yan if (ext4_has_feature_64bit(sb)) { 4644d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4645d7f3542bSJason Yan "The Hurd can't support 64-bit file systems"); 4646d7f3542bSJason Yan return -EINVAL; 4647d7f3542bSJason Yan } 4648d7f3542bSJason Yan 4649d7f3542bSJason Yan /* 4650d7f3542bSJason Yan * ea_inode feature uses l_i_version field which is not 4651d7f3542bSJason Yan * available in HURD_COMPAT mode. 4652d7f3542bSJason Yan */ 4653d7f3542bSJason Yan if (ext4_has_feature_ea_inode(sb)) { 4654d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4655d7f3542bSJason Yan "ea_inode feature is not supported for Hurd"); 4656d7f3542bSJason Yan return -EINVAL; 4657d7f3542bSJason Yan } 4658d7f3542bSJason Yan } 4659d7f3542bSJason Yan 4660d7f3542bSJason Yan if (IS_EXT2_SB(sb)) { 4661d7f3542bSJason Yan if (ext2_feature_set_ok(sb)) 4662d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 4663d7f3542bSJason Yan "using the ext4 subsystem"); 4664d7f3542bSJason Yan else { 4665d7f3542bSJason Yan /* 4666d7f3542bSJason Yan * If we're probing be silent, if this looks like 4667d7f3542bSJason Yan * it's actually an ext[34] filesystem. 4668d7f3542bSJason Yan */ 4669d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4670d7f3542bSJason Yan return -EINVAL; 4671d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 4672d7f3542bSJason Yan "to feature incompatibilities"); 4673d7f3542bSJason Yan return -EINVAL; 4674d7f3542bSJason Yan } 4675d7f3542bSJason Yan } 4676d7f3542bSJason Yan 4677d7f3542bSJason Yan if (IS_EXT3_SB(sb)) { 4678d7f3542bSJason Yan if (ext3_feature_set_ok(sb)) 4679d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 4680d7f3542bSJason Yan "using the ext4 subsystem"); 4681d7f3542bSJason Yan else { 4682d7f3542bSJason Yan /* 4683d7f3542bSJason Yan * If we're probing be silent, if this looks like 4684d7f3542bSJason Yan * it's actually an ext4 filesystem. 4685d7f3542bSJason Yan */ 4686d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4687d7f3542bSJason Yan return -EINVAL; 4688d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 4689d7f3542bSJason Yan "to feature incompatibilities"); 4690d7f3542bSJason Yan return -EINVAL; 4691d7f3542bSJason Yan } 4692d7f3542bSJason Yan } 4693d7f3542bSJason Yan 4694d7f3542bSJason Yan /* 4695d7f3542bSJason Yan * Check feature flags regardless of the revision level, since we 4696d7f3542bSJason Yan * previously didn't change the revision level when setting the flags, 4697d7f3542bSJason Yan * so there is a chance incompat flags are set on a rev 0 filesystem. 4698d7f3542bSJason Yan */ 4699d7f3542bSJason Yan if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4700d7f3542bSJason Yan return -EINVAL; 4701d7f3542bSJason Yan 470254902099SJason Yan if (sbi->s_daxdev) { 470354902099SJason Yan if (sb->s_blocksize == PAGE_SIZE) 470454902099SJason Yan set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 470554902099SJason Yan else 470654902099SJason Yan ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 470754902099SJason Yan } 470854902099SJason Yan 470954902099SJason Yan if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 471054902099SJason Yan if (ext4_has_feature_inline_data(sb)) { 471154902099SJason Yan ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 471254902099SJason Yan " that may contain inline data"); 471354902099SJason Yan return -EINVAL; 471454902099SJason Yan } 471554902099SJason Yan if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 471654902099SJason Yan ext4_msg(sb, KERN_ERR, 471754902099SJason Yan "DAX unsupported by block device."); 471854902099SJason Yan return -EINVAL; 471954902099SJason Yan } 472054902099SJason Yan } 472154902099SJason Yan 472254902099SJason Yan if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 472354902099SJason Yan ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 472454902099SJason Yan es->s_encryption_level); 472554902099SJason Yan return -EINVAL; 472654902099SJason Yan } 472754902099SJason Yan 4728d7f3542bSJason Yan return 0; 4729d7f3542bSJason Yan } 4730d7f3542bSJason Yan 473168e62439SJason Yan static int ext4_check_geometry(struct super_block *sb, 4732bc62dbf9SJason Yan struct ext4_super_block *es) 4733bc62dbf9SJason Yan { 4734bc62dbf9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4735bc62dbf9SJason Yan __u64 blocks_count; 4736269e9226SJason Yan int err; 4737269e9226SJason Yan 4738269e9226SJason Yan if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) { 4739269e9226SJason Yan ext4_msg(sb, KERN_ERR, 4740269e9226SJason Yan "Number of reserved GDT blocks insanely large: %d", 4741269e9226SJason Yan le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 4742269e9226SJason Yan return -EINVAL; 4743269e9226SJason Yan } 4744269e9226SJason Yan /* 4745269e9226SJason Yan * Test whether we have more sectors than will fit in sector_t, 4746269e9226SJason Yan * and whether the max offset is addressable by the page cache. 4747269e9226SJason Yan */ 4748269e9226SJason Yan err = generic_check_addressable(sb->s_blocksize_bits, 4749269e9226SJason Yan ext4_blocks_count(es)); 4750269e9226SJason Yan if (err) { 4751269e9226SJason Yan ext4_msg(sb, KERN_ERR, "filesystem" 4752269e9226SJason Yan " too large to mount safely on this system"); 4753269e9226SJason Yan return err; 4754269e9226SJason Yan } 4755bc62dbf9SJason Yan 4756bc62dbf9SJason Yan /* check blocks count against device size */ 4757bc62dbf9SJason Yan blocks_count = sb_bdev_nr_blocks(sb); 4758bc62dbf9SJason Yan if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4759bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4760bc62dbf9SJason Yan "exceeds size of device (%llu blocks)", 4761bc62dbf9SJason Yan ext4_blocks_count(es), blocks_count); 4762bc62dbf9SJason Yan return -EINVAL; 4763bc62dbf9SJason Yan } 4764bc62dbf9SJason Yan 4765bc62dbf9SJason Yan /* 4766bc62dbf9SJason Yan * It makes no sense for the first data block to be beyond the end 4767bc62dbf9SJason Yan * of the filesystem. 4768bc62dbf9SJason Yan */ 4769bc62dbf9SJason Yan if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4770bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4771bc62dbf9SJason Yan "block %u is beyond end of filesystem (%llu)", 4772bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4773bc62dbf9SJason Yan ext4_blocks_count(es)); 4774bc62dbf9SJason Yan return -EINVAL; 4775bc62dbf9SJason Yan } 4776bc62dbf9SJason Yan if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4777bc62dbf9SJason Yan (sbi->s_cluster_ratio == 1)) { 4778bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4779bc62dbf9SJason Yan "block is 0 with a 1k block and cluster size"); 4780bc62dbf9SJason Yan return -EINVAL; 4781bc62dbf9SJason Yan } 4782bc62dbf9SJason Yan 4783bc62dbf9SJason Yan blocks_count = (ext4_blocks_count(es) - 4784bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block) + 4785bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb) - 1); 4786bc62dbf9SJason Yan do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 4787bc62dbf9SJason Yan if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4788bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 4789bc62dbf9SJason Yan "(block count %llu, first data block %u, " 4790bc62dbf9SJason Yan "blocks per group %lu)", blocks_count, 4791bc62dbf9SJason Yan ext4_blocks_count(es), 4792bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4793bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb)); 4794bc62dbf9SJason Yan return -EINVAL; 4795bc62dbf9SJason Yan } 4796bc62dbf9SJason Yan sbi->s_groups_count = blocks_count; 4797bc62dbf9SJason Yan sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4798bc62dbf9SJason Yan (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4799bc62dbf9SJason Yan if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4800bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count)) { 4801bc62dbf9SJason Yan ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4802bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count), 4803bc62dbf9SJason Yan ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4804bc62dbf9SJason Yan return -EINVAL; 4805bc62dbf9SJason Yan } 4806bc62dbf9SJason Yan 4807bc62dbf9SJason Yan return 0; 4808bc62dbf9SJason Yan } 4809bc62dbf9SJason Yan 4810a4e6a511SJason Yan static int ext4_group_desc_init(struct super_block *sb, 4811a4e6a511SJason Yan struct ext4_super_block *es, 4812a4e6a511SJason Yan ext4_fsblk_t logical_sb_block, 4813a4e6a511SJason Yan ext4_group_t *first_not_zeroed) 4814a4e6a511SJason Yan { 4815a4e6a511SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4816a4e6a511SJason Yan unsigned int db_count; 4817a4e6a511SJason Yan ext4_fsblk_t block; 4818a4e6a511SJason Yan int i; 4819a4e6a511SJason Yan 4820a4e6a511SJason Yan db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4821a4e6a511SJason Yan EXT4_DESC_PER_BLOCK(sb); 4822a4e6a511SJason Yan if (ext4_has_feature_meta_bg(sb)) { 4823a4e6a511SJason Yan if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 4824a4e6a511SJason Yan ext4_msg(sb, KERN_WARNING, 4825a4e6a511SJason Yan "first meta block group too large: %u " 4826a4e6a511SJason Yan "(group descriptor block count %u)", 4827a4e6a511SJason Yan le32_to_cpu(es->s_first_meta_bg), db_count); 4828a4e6a511SJason Yan return -EINVAL; 4829a4e6a511SJason Yan } 4830a4e6a511SJason Yan } 4831a4e6a511SJason Yan rcu_assign_pointer(sbi->s_group_desc, 4832a4e6a511SJason Yan kvmalloc_array(db_count, 4833a4e6a511SJason Yan sizeof(struct buffer_head *), 4834a4e6a511SJason Yan GFP_KERNEL)); 4835a4e6a511SJason Yan if (sbi->s_group_desc == NULL) { 4836a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "not enough memory"); 4837a4e6a511SJason Yan return -ENOMEM; 4838a4e6a511SJason Yan } 4839a4e6a511SJason Yan 4840a4e6a511SJason Yan bgl_lock_init(sbi->s_blockgroup_lock); 4841a4e6a511SJason Yan 4842a4e6a511SJason Yan /* Pre-read the descriptors into the buffer cache */ 4843a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4844a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4845a4e6a511SJason Yan ext4_sb_breadahead_unmovable(sb, block); 4846a4e6a511SJason Yan } 4847a4e6a511SJason Yan 4848a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4849a4e6a511SJason Yan struct buffer_head *bh; 4850a4e6a511SJason Yan 4851a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4852a4e6a511SJason Yan bh = ext4_sb_bread_unmovable(sb, block); 4853a4e6a511SJason Yan if (IS_ERR(bh)) { 4854a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, 4855a4e6a511SJason Yan "can't read group descriptor %d", i); 4856a4e6a511SJason Yan sbi->s_gdb_count = i; 4857172e344eSYe Bin return PTR_ERR(bh); 4858a4e6a511SJason Yan } 4859a4e6a511SJason Yan rcu_read_lock(); 4860a4e6a511SJason Yan rcu_dereference(sbi->s_group_desc)[i] = bh; 4861a4e6a511SJason Yan rcu_read_unlock(); 4862a4e6a511SJason Yan } 4863a4e6a511SJason Yan sbi->s_gdb_count = db_count; 4864a4e6a511SJason Yan if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { 4865a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 4866172e344eSYe Bin return -EFSCORRUPTED; 4867a4e6a511SJason Yan } 4868172e344eSYe Bin 4869a4e6a511SJason Yan return 0; 4870a4e6a511SJason Yan } 4871a4e6a511SJason Yan 48729c1dd22dSJason Yan static int ext4_load_and_init_journal(struct super_block *sb, 48739c1dd22dSJason Yan struct ext4_super_block *es, 48749c1dd22dSJason Yan struct ext4_fs_context *ctx) 48759c1dd22dSJason Yan { 48769c1dd22dSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 48779c1dd22dSJason Yan int err; 48789c1dd22dSJason Yan 48799c1dd22dSJason Yan err = ext4_load_journal(sb, es, ctx->journal_devnum); 48809c1dd22dSJason Yan if (err) 48819c1dd22dSJason Yan return err; 48829c1dd22dSJason Yan 48839c1dd22dSJason Yan if (ext4_has_feature_64bit(sb) && 48849c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 48859c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_64BIT)) { 48869c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 48879c1dd22dSJason Yan goto out; 48889c1dd22dSJason Yan } 48899c1dd22dSJason Yan 48909c1dd22dSJason Yan if (!set_journal_csum_feature_set(sb)) { 48919c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 48929c1dd22dSJason Yan "feature set"); 48939c1dd22dSJason Yan goto out; 48949c1dd22dSJason Yan } 48959c1dd22dSJason Yan 48969c1dd22dSJason Yan if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 48979c1dd22dSJason Yan !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 48989c1dd22dSJason Yan JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 48999c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, 49009c1dd22dSJason Yan "Failed to set fast commit journal feature"); 49019c1dd22dSJason Yan goto out; 49029c1dd22dSJason Yan } 49039c1dd22dSJason Yan 49049c1dd22dSJason Yan /* We have now updated the journal if required, so we can 49059c1dd22dSJason Yan * validate the data journaling mode. */ 49069c1dd22dSJason Yan switch (test_opt(sb, DATA_FLAGS)) { 49079c1dd22dSJason Yan case 0: 49089c1dd22dSJason Yan /* No mode set, assume a default based on the journal 49099c1dd22dSJason Yan * capabilities: ORDERED_DATA if the journal can 49109c1dd22dSJason Yan * cope, else JOURNAL_DATA 49119c1dd22dSJason Yan */ 49129c1dd22dSJason Yan if (jbd2_journal_check_available_features 49139c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49149c1dd22dSJason Yan set_opt(sb, ORDERED_DATA); 49159c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 49169c1dd22dSJason Yan } else { 49179c1dd22dSJason Yan set_opt(sb, JOURNAL_DATA); 49189c1dd22dSJason Yan sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 49199c1dd22dSJason Yan } 49209c1dd22dSJason Yan break; 49219c1dd22dSJason Yan 49229c1dd22dSJason Yan case EXT4_MOUNT_ORDERED_DATA: 49239c1dd22dSJason Yan case EXT4_MOUNT_WRITEBACK_DATA: 49249c1dd22dSJason Yan if (!jbd2_journal_check_available_features 49259c1dd22dSJason Yan (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 49269c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "Journal does not support " 49279c1dd22dSJason Yan "requested data journaling mode"); 49289c1dd22dSJason Yan goto out; 49299c1dd22dSJason Yan } 49309c1dd22dSJason Yan break; 49319c1dd22dSJason Yan default: 49329c1dd22dSJason Yan break; 49339c1dd22dSJason Yan } 49349c1dd22dSJason Yan 49359c1dd22dSJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 49369c1dd22dSJason Yan test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 49379c1dd22dSJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 49389c1dd22dSJason Yan "journal_async_commit in data=ordered mode"); 49399c1dd22dSJason Yan goto out; 49409c1dd22dSJason Yan } 49419c1dd22dSJason Yan 49429c1dd22dSJason Yan set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 49439c1dd22dSJason Yan 49449c1dd22dSJason Yan sbi->s_journal->j_submit_inode_data_buffers = 49459c1dd22dSJason Yan ext4_journal_submit_inode_data_buffers; 49469c1dd22dSJason Yan sbi->s_journal->j_finish_inode_data_buffers = 49479c1dd22dSJason Yan ext4_journal_finish_inode_data_buffers; 49489c1dd22dSJason Yan 49499c1dd22dSJason Yan return 0; 49509c1dd22dSJason Yan 49519c1dd22dSJason Yan out: 4952bb15cea2STheodore Ts'o /* flush s_sb_upd_work before destroying the journal. */ 4953bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 49549c1dd22dSJason Yan jbd2_journal_destroy(sbi->s_journal); 49559c1dd22dSJason Yan sbi->s_journal = NULL; 49569f2a1d9fSJason Yan return -EINVAL; 49579c1dd22dSJason Yan } 49589c1dd22dSJason Yan 495968e62439SJason Yan static int ext4_check_journal_data_mode(struct super_block *sb) 4960a5991e53SJason Yan { 4961a5991e53SJason Yan if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4962a5991e53SJason Yan printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with " 4963a5991e53SJason Yan "data=journal disables delayed allocation, " 4964a5991e53SJason Yan "dioread_nolock, O_DIRECT and fast_commit support!\n"); 4965a5991e53SJason Yan /* can't mount with both data=journal and dioread_nolock. */ 4966a5991e53SJason Yan clear_opt(sb, DIOREAD_NOLOCK); 4967a5991e53SJason Yan clear_opt2(sb, JOURNAL_FAST_COMMIT); 4968a5991e53SJason Yan if (test_opt2(sb, EXPLICIT_DELALLOC)) { 4969a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4970a5991e53SJason Yan "both data=journal and delalloc"); 4971a5991e53SJason Yan return -EINVAL; 4972a5991e53SJason Yan } 4973a5991e53SJason Yan if (test_opt(sb, DAX_ALWAYS)) { 4974a5991e53SJason Yan ext4_msg(sb, KERN_ERR, "can't mount with " 4975a5991e53SJason Yan "both data=journal and dax"); 4976a5991e53SJason Yan return -EINVAL; 4977a5991e53SJason Yan } 4978a5991e53SJason Yan if (ext4_has_feature_encrypt(sb)) { 4979a5991e53SJason Yan ext4_msg(sb, KERN_WARNING, 4980a5991e53SJason Yan "encrypted files will use data=ordered " 4981a5991e53SJason Yan "instead of data journaling mode"); 4982a5991e53SJason Yan } 4983a5991e53SJason Yan if (test_opt(sb, DELALLOC)) 4984a5991e53SJason Yan clear_opt(sb, DELALLOC); 4985a5991e53SJason Yan } else { 4986a5991e53SJason Yan sb->s_iflags |= SB_I_CGROUPWB; 4987a5991e53SJason Yan } 4988a5991e53SJason Yan 4989a5991e53SJason Yan return 0; 4990a5991e53SJason Yan } 4991a5991e53SJason Yan 4992a7a79c29SJason Yan static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, 4993a7a79c29SJason Yan int silent) 4994a7a79c29SJason Yan { 4995a7a79c29SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4996a7a79c29SJason Yan struct ext4_super_block *es; 4997a7a79c29SJason Yan ext4_fsblk_t logical_sb_block; 4998a7a79c29SJason Yan unsigned long offset = 0; 4999a7a79c29SJason Yan struct buffer_head *bh; 5000a7a79c29SJason Yan int ret = -EINVAL; 5001a7a79c29SJason Yan int blocksize; 5002a7a79c29SJason Yan 5003a7a79c29SJason Yan blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 5004a7a79c29SJason Yan if (!blocksize) { 5005a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 5006a7a79c29SJason Yan return -EINVAL; 5007a7a79c29SJason Yan } 5008a7a79c29SJason Yan 5009a7a79c29SJason Yan /* 5010a7a79c29SJason Yan * The ext4 superblock will not be buffer aligned for other than 1kB 5011a7a79c29SJason Yan * block sizes. We need to calculate the offset from buffer start. 5012a7a79c29SJason Yan */ 5013a7a79c29SJason Yan if (blocksize != EXT4_MIN_BLOCK_SIZE) { 5014a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5015a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5016a7a79c29SJason Yan } else { 5017a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block; 5018a7a79c29SJason Yan } 5019a7a79c29SJason Yan 5020a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5021a7a79c29SJason Yan if (IS_ERR(bh)) { 5022a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "unable to read superblock"); 5023a7a79c29SJason Yan return PTR_ERR(bh); 5024a7a79c29SJason Yan } 5025a7a79c29SJason Yan /* 5026a7a79c29SJason Yan * Note: s_es must be initialized as soon as possible because 5027a7a79c29SJason Yan * some ext4 macro-instructions depend on its value 5028a7a79c29SJason Yan */ 5029a7a79c29SJason Yan es = (struct ext4_super_block *) (bh->b_data + offset); 5030a7a79c29SJason Yan sbi->s_es = es; 5031a7a79c29SJason Yan sb->s_magic = le16_to_cpu(es->s_magic); 5032a7a79c29SJason Yan if (sb->s_magic != EXT4_SUPER_MAGIC) { 5033a7a79c29SJason Yan if (!silent) 5034a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5035a7a79c29SJason Yan goto out; 5036a7a79c29SJason Yan } 5037a7a79c29SJason Yan 5038a7a79c29SJason Yan if (le32_to_cpu(es->s_log_block_size) > 5039a7a79c29SJason Yan (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5040a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5041a7a79c29SJason Yan "Invalid log block size: %u", 5042a7a79c29SJason Yan le32_to_cpu(es->s_log_block_size)); 5043a7a79c29SJason Yan goto out; 5044a7a79c29SJason Yan } 5045a7a79c29SJason Yan if (le32_to_cpu(es->s_log_cluster_size) > 5046a7a79c29SJason Yan (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 5047a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, 5048a7a79c29SJason Yan "Invalid log cluster size: %u", 5049a7a79c29SJason Yan le32_to_cpu(es->s_log_cluster_size)); 5050a7a79c29SJason Yan goto out; 5051a7a79c29SJason Yan } 5052a7a79c29SJason Yan 5053a7a79c29SJason Yan blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 5054a7a79c29SJason Yan 5055a7a79c29SJason Yan /* 5056a7a79c29SJason Yan * If the default block size is not the same as the real block size, 5057a7a79c29SJason Yan * we need to reload it. 5058a7a79c29SJason Yan */ 5059a7a79c29SJason Yan if (sb->s_blocksize == blocksize) { 5060a7a79c29SJason Yan *lsb = logical_sb_block; 5061a7a79c29SJason Yan sbi->s_sbh = bh; 5062a7a79c29SJason Yan return 0; 5063a7a79c29SJason Yan } 5064a7a79c29SJason Yan 5065a7a79c29SJason Yan /* 5066a7a79c29SJason Yan * bh must be released before kill_bdev(), otherwise 5067a7a79c29SJason Yan * it won't be freed and its page also. kill_bdev() 5068a7a79c29SJason Yan * is called by sb_set_blocksize(). 5069a7a79c29SJason Yan */ 5070a7a79c29SJason Yan brelse(bh); 5071a7a79c29SJason Yan /* Validate the filesystem blocksize */ 5072a7a79c29SJason Yan if (!sb_set_blocksize(sb, blocksize)) { 5073a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "bad block size %d", 5074a7a79c29SJason Yan blocksize); 5075a7a79c29SJason Yan bh = NULL; 5076a7a79c29SJason Yan goto out; 5077a7a79c29SJason Yan } 5078a7a79c29SJason Yan 5079a7a79c29SJason Yan logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 5080a7a79c29SJason Yan offset = do_div(logical_sb_block, blocksize); 5081a7a79c29SJason Yan bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 5082a7a79c29SJason Yan if (IS_ERR(bh)) { 5083a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try"); 5084a7a79c29SJason Yan ret = PTR_ERR(bh); 5085a7a79c29SJason Yan bh = NULL; 5086a7a79c29SJason Yan goto out; 5087a7a79c29SJason Yan } 5088a7a79c29SJason Yan es = (struct ext4_super_block *)(bh->b_data + offset); 5089a7a79c29SJason Yan sbi->s_es = es; 5090a7a79c29SJason Yan if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 5091a7a79c29SJason Yan ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); 5092a7a79c29SJason Yan goto out; 5093a7a79c29SJason Yan } 5094a7a79c29SJason Yan *lsb = logical_sb_block; 5095a7a79c29SJason Yan sbi->s_sbh = bh; 5096a7a79c29SJason Yan return 0; 5097a7a79c29SJason Yan out: 5098a7a79c29SJason Yan brelse(bh); 5099a7a79c29SJason Yan return ret; 5100a7a79c29SJason Yan } 5101a7a79c29SJason Yan 5102db9345d9SJason Yan static void ext4_hash_info_init(struct super_block *sb) 5103db9345d9SJason Yan { 5104db9345d9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5105db9345d9SJason Yan struct ext4_super_block *es = sbi->s_es; 5106db9345d9SJason Yan unsigned int i; 5107db9345d9SJason Yan 5108db9345d9SJason Yan for (i = 0; i < 4; i++) 5109db9345d9SJason Yan sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 5110db9345d9SJason Yan 5111db9345d9SJason Yan sbi->s_def_hash_version = es->s_def_hash_version; 5112db9345d9SJason Yan if (ext4_has_feature_dir_index(sb)) { 5113db9345d9SJason Yan i = le32_to_cpu(es->s_flags); 5114db9345d9SJason Yan if (i & EXT2_FLAGS_UNSIGNED_HASH) 5115db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5116db9345d9SJason Yan else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 5117db9345d9SJason Yan #ifdef __CHAR_UNSIGNED__ 5118db9345d9SJason Yan if (!sb_rdonly(sb)) 5119db9345d9SJason Yan es->s_flags |= 5120db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 5121db9345d9SJason Yan sbi->s_hash_unsigned = 3; 5122db9345d9SJason Yan #else 5123db9345d9SJason Yan if (!sb_rdonly(sb)) 5124db9345d9SJason Yan es->s_flags |= 5125db9345d9SJason Yan cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 5126db9345d9SJason Yan #endif 5127db9345d9SJason Yan } 5128db9345d9SJason Yan } 5129db9345d9SJason Yan } 5130db9345d9SJason Yan 5131107d2be9SJason Yan static int ext4_block_group_meta_init(struct super_block *sb, int silent) 5132107d2be9SJason Yan { 5133107d2be9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 5134107d2be9SJason Yan struct ext4_super_block *es = sbi->s_es; 5135107d2be9SJason Yan int has_huge_files; 5136107d2be9SJason Yan 5137107d2be9SJason Yan has_huge_files = ext4_has_feature_huge_file(sb); 5138107d2be9SJason Yan sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 5139107d2be9SJason Yan has_huge_files); 5140107d2be9SJason Yan sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 5141107d2be9SJason Yan 5142107d2be9SJason Yan sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 5143107d2be9SJason Yan if (ext4_has_feature_64bit(sb)) { 5144107d2be9SJason Yan if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 5145107d2be9SJason Yan sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 5146107d2be9SJason Yan !is_power_of_2(sbi->s_desc_size)) { 5147107d2be9SJason Yan ext4_msg(sb, KERN_ERR, 5148107d2be9SJason Yan "unsupported descriptor size %lu", 5149107d2be9SJason Yan sbi->s_desc_size); 5150107d2be9SJason Yan return -EINVAL; 5151107d2be9SJason Yan } 5152107d2be9SJason Yan } else 5153107d2be9SJason Yan sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 5154107d2be9SJason Yan 5155107d2be9SJason Yan sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 5156107d2be9SJason Yan sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 5157107d2be9SJason Yan 5158107d2be9SJason Yan sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb); 5159107d2be9SJason Yan if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { 5160107d2be9SJason Yan if (!silent) 5161107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5162107d2be9SJason Yan return -EINVAL; 5163107d2be9SJason Yan } 5164107d2be9SJason Yan if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 5165107d2be9SJason Yan sbi->s_inodes_per_group > sb->s_blocksize * 8) { 5166107d2be9SJason Yan ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 5167107d2be9SJason Yan sbi->s_inodes_per_group); 5168107d2be9SJason Yan return -EINVAL; 5169107d2be9SJason Yan } 5170107d2be9SJason Yan sbi->s_itb_per_group = sbi->s_inodes_per_group / 5171107d2be9SJason Yan sbi->s_inodes_per_block; 5172107d2be9SJason Yan sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb); 5173107d2be9SJason Yan sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 5174107d2be9SJason Yan sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 5175107d2be9SJason Yan sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 5176107d2be9SJason Yan 5177107d2be9SJason Yan return 0; 5178107d2be9SJason Yan } 5179107d2be9SJason Yan 5180960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 51817edfd85bSLukas Czerner { 5182617ba13bSMingming Cao struct ext4_super_block *es = NULL; 51837edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 518470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 5185ac27a0ecSDave Kleikamp struct inode *root; 5186107d2be9SJason Yan int needs_recovery; 5187d4fab7b2STheodore Ts'o int err; 5188bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 51897edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 5190960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 5191b237e304SHarshad Shirwadkar 5192b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 5193e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 51947edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5195ac27a0ecSDave Kleikamp 5196240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 5197f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 51988446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 5199ac27a0ecSDave Kleikamp 5200a7a79c29SJason Yan err = ext4_load_super(sb, &logical_sb_block, silent); 5201a7a79c29SJason Yan if (err) 5202ac27a0ecSDave Kleikamp goto out_fail; 5203ac27a0ecSDave Kleikamp 5204a7a79c29SJason Yan es = sbi->s_es; 5205afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 5206ac27a0ecSDave Kleikamp 5207b26458d1SJason Yan err = ext4_init_metadata_csum(sb, es); 5208b26458d1SJason Yan if (err) 5209a5fc5119SJason Yan goto failed_mount; 5210a9c47317SDarrick J. Wong 52115f6d662dSJason Yan ext4_set_def_opts(sb, es); 5212ac27a0ecSDave Kleikamp 521308cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 521408cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 521530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 521630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 521730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 5218ac27a0ecSDave Kleikamp 521951ce6511SLukas Czerner /* 522051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 522151ce6511SLukas Czerner * no mount option specified. 522251ce6511SLukas Czerner */ 522351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 522451ce6511SLukas Czerner 5225d4fab7b2STheodore Ts'o err = ext4_inode_info_init(sb, es); 5226d4fab7b2STheodore Ts'o if (err) 52279803387cSTheodore Ts'o goto failed_mount; 52289803387cSTheodore Ts'o 52297edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 52307edfd85bSLukas Czerner if (err < 0) 52315aee0f8aSTheodore Ts'o goto failed_mount; 52327edfd85bSLukas Czerner 52335a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 5234e3645d72SZhang Yi sbi->s_def_mount_opt2 = sbi->s_mount_opt2; 52357edfd85bSLukas Czerner 52367edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 52377edfd85bSLukas Czerner if (err < 0) 52387edfd85bSLukas Czerner goto failed_mount; 52397edfd85bSLukas Czerner 524085456054SEric Biggers ext4_apply_options(fc, sb); 5241ac27a0ecSDave Kleikamp 5242d4fab7b2STheodore Ts'o err = ext4_encoding_init(sb, es); 5243d4fab7b2STheodore Ts'o if (err) 5244c83ad55eSGabriel Krisman Bertazi goto failed_mount; 5245c83ad55eSGabriel Krisman Bertazi 5246d4fab7b2STheodore Ts'o err = ext4_check_journal_data_mode(sb); 5247d4fab7b2STheodore Ts'o if (err) 524856889787STheodore Ts'o goto failed_mount; 524956889787STheodore Ts'o 52501751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 52511751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5252ac27a0ecSDave Kleikamp 52531ff20307SJeff Layton /* i_version is always enabled now */ 52541ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 52551ff20307SJeff Layton 5256d4fab7b2STheodore Ts'o err = ext4_check_feature_compatibility(sb, es, silent); 5257d4fab7b2STheodore Ts'o if (err) 5258ac27a0ecSDave Kleikamp goto failed_mount; 5259a13fb1a4SEric Sandeen 5260d4fab7b2STheodore Ts'o err = ext4_block_group_meta_init(sb, silent); 5261d4fab7b2STheodore Ts'o if (err) 52625b9554dcSTheodore Ts'o goto failed_mount; 52635b9554dcSTheodore Ts'o 5264db9345d9SJason Yan ext4_hash_info_init(sb); 5265ac27a0ecSDave Kleikamp 5266d4fab7b2STheodore Ts'o err = ext4_handle_clustersize(sb); 5267d4fab7b2STheodore Ts'o if (err) 5268281b5995STheodore Ts'o goto failed_mount; 5269960fd856STheodore Ts'o 5270d4fab7b2STheodore Ts'o err = ext4_check_geometry(sb, es); 5271d4fab7b2STheodore Ts'o if (err) 52720f2ddca6SFrom: Thiemo Nagel goto failed_mount; 52730f2ddca6SFrom: Thiemo Nagel 5274235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5275c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5276bb15cea2STheodore Ts'o INIT_WORK(&sbi->s_sb_upd_work, update_super_work); 527704496411STao Ma 5278172e344eSYe Bin err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); 5279172e344eSYe Bin if (err) 5280172e344eSYe Bin goto failed_mount3; 5281172e344eSYe Bin 5282d4fab7b2STheodore Ts'o err = ext4_es_register_shrinker(sbi); 5283d4fab7b2STheodore Ts'o if (err) 5284ce7e010aSTheodore Ts'o goto failed_mount3; 5285ce7e010aSTheodore Ts'o 5286c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 5287c3defd99SKemeng Shi /* 5288c3defd99SKemeng Shi * It's hard to get stripe aligned blocks if stripe is not aligned with 5289c3defd99SKemeng Shi * cluster, just disable stripe and alert user to simpfy code and avoid 5290c3defd99SKemeng Shi * stripe aligned allocation which will rarely successes. 5291c3defd99SKemeng Shi */ 5292c3defd99SKemeng Shi if (sbi->s_stripe > 0 && sbi->s_cluster_ratio > 1 && 5293c3defd99SKemeng Shi sbi->s_stripe % sbi->s_cluster_ratio != 0) { 5294c3defd99SKemeng Shi ext4_msg(sb, KERN_WARNING, 5295c3defd99SKemeng Shi "stripe (%lu) is not aligned with cluster size (%u), " 5296c3defd99SKemeng Shi "stripe is disabled", 5297c3defd99SKemeng Shi sbi->s_stripe, sbi->s_cluster_ratio); 5298c3defd99SKemeng Shi sbi->s_stripe = 0; 5299c3defd99SKemeng Shi } 530067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5301c9de560dSAlex Tomas 5302f9ae9cf5STheodore Ts'o /* 5303f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5304f9ae9cf5STheodore Ts'o */ 5305f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5306617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5307617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5308643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5309a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5310ffcc4182SEric Biggers #endif 5311c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5312c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5313c93d8f88SEric Biggers #endif 5314ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5315617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5316e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 53171fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5318262b4662SJan Kara else 5319262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5320689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5321ac27a0ecSDave Kleikamp #endif 5322a4af51ceSKent Overstreet super_set_uuid(sb, es->s_uuid, sizeof(es->s_uuid)); 5323fb092d40SKent Overstreet super_set_sysfs_name_bdev(sb); 5324f2fa2ffcSAneesh Kumar K.V 5325ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 53263b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5327ac27a0ecSDave Kleikamp 5328f7314a67SJason Yan ext4_fast_commit_init(sb); 5329aa75f4d3SHarshad Shirwadkar 5330ac27a0ecSDave Kleikamp sb->s_root = NULL; 5331ac27a0ecSDave Kleikamp 5332ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 533302f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5334e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5335ac27a0ecSDave Kleikamp 53363b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) { 53373b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block)); 53383b50d501STheodore Ts'o if (err) 533950460fe8SDarrick J. Wong goto failed_mount3a; 53403b50d501STheodore Ts'o } 5341c5e06d10SJohann Lombardi 5342d4fab7b2STheodore Ts'o err = -EINVAL; 5343ac27a0ecSDave Kleikamp /* 5344ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5345ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5346ac27a0ecSDave Kleikamp */ 5347e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 53489c1dd22dSJason Yan err = ext4_load_and_init_journal(sb, es, ctx); 53494753d8a2STheodore Ts'o if (err) 535050460fe8SDarrick J. Wong goto failed_mount3a; 5351bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5352e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5353b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5354b31e1552SEric Sandeen "suppressed and not mounted read-only"); 535543bd6f1bSJason Yan goto failed_mount3a; 5356ac27a0ecSDave Kleikamp } else { 53571e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 53581e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 53591e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53601e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 536143bd6f1bSJason Yan goto failed_mount3a; 53621e381f60SDmitry Monakhov } 536389481b5fSBaokun Li 536489481b5fSBaokun Li if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 536589481b5fSBaokun Li ext4_msg(sb, KERN_ERR, "can't mount with " 536689481b5fSBaokun Li "journal_checksum, fs mounted w/o journal"); 536789481b5fSBaokun Li goto failed_mount3a; 536889481b5fSBaokun Li } 53691e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 53701e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53711e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 53721e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 537343bd6f1bSJason Yan goto failed_mount3a; 53741e381f60SDmitry Monakhov } 53751e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 53761e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 53771e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 53781e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 537943bd6f1bSJason Yan goto failed_mount3a; 53801e381f60SDmitry Monakhov } 538150b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 53821e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5383fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5384995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 53850390131bSFrank Mayhar sbi->s_journal = NULL; 53860390131bSFrank Mayhar needs_recovery = 0; 5387ac27a0ecSDave Kleikamp } 5388ac27a0ecSDave Kleikamp 5389cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 539047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 539147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5392cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5393cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 5394d4fab7b2STheodore Ts'o err = -EINVAL; 53959c191f70ST Makphaibulchoke goto failed_mount_wq; 53969c191f70ST Makphaibulchoke } 53979c191f70ST Makphaibulchoke 5398dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5399dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5400dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5401dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5402dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5403d4fab7b2STheodore Ts'o err = -EINVAL; 5404dec214d0STahsin Erdogan goto failed_mount_wq; 5405dec214d0STahsin Erdogan } 5406dec214d0STahsin Erdogan } 5407cdb7ee4cSTahsin Erdogan } 5408dec214d0STahsin Erdogan 5409fd89d5f2STejun Heo /* 5410952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5411952fc18eSTheodore Ts'o * superblock if present. 5412952fc18eSTheodore Ts'o */ 5413952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 541485d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 541585d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 541685d825dbSTheodore Ts'o sbi->s_overhead = 0; 541785d825dbSTheodore Ts'o /* 541885d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 541985d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 542085d825dbSTheodore Ts'o * it to make sure we are using the correct value. 542185d825dbSTheodore Ts'o */ 542285d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 542385d825dbSTheodore Ts'o sbi->s_overhead = 0; 542485d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 542507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 542607aa2ea1SLukas Czerner if (err) 5427952fc18eSTheodore Ts'o goto failed_mount_wq; 5428952fc18eSTheodore Ts'o } 5429952fc18eSTheodore Ts'o 5430952fc18eSTheodore Ts'o /* 5431fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5432fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5433fd89d5f2STejun Heo */ 54342e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 54352e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 54362e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 54372e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 5438d4fab7b2STheodore Ts'o err = -ENOMEM; 54392e8fa54eSJan Kara goto failed_mount4; 54402e8fa54eSJan Kara } 54412e8fa54eSJan Kara 5442ac27a0ecSDave Kleikamp /* 5443dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5444ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5445ac27a0ecSDave Kleikamp */ 5446ac27a0ecSDave Kleikamp 54478a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 54481d1fe1eeSDavid Howells if (IS_ERR(root)) { 5449b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 5450d4fab7b2STheodore Ts'o err = PTR_ERR(root); 545132a9bb57SManish Katiyar root = NULL; 5452ac27a0ecSDave Kleikamp goto failed_mount4; 5453ac27a0ecSDave Kleikamp } 5454ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5455b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 545694bf608aSAl Viro iput(root); 5457d4fab7b2STheodore Ts'o err = -EFSCORRUPTED; 5458ac27a0ecSDave Kleikamp goto failed_mount4; 5459ac27a0ecSDave Kleikamp } 5460b886ee3eSGabriel Krisman Bertazi 546104aa5f4eSGabriel Krisman Bertazi generic_set_sb_d_ops(sb); 546248fde701SAl Viro sb->s_root = d_make_root(root); 54631d1fe1eeSDavid Howells if (!sb->s_root) { 5464b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 5465d4fab7b2STheodore Ts'o err = -ENOMEM; 54661d1fe1eeSDavid Howells goto failed_mount4; 54671d1fe1eeSDavid Howells } 5468ac27a0ecSDave Kleikamp 5469d4fab7b2STheodore Ts'o err = ext4_setup_super(sb, es, sb_rdonly(sb)); 5470d4fab7b2STheodore Ts'o if (err == -EROFS) { 54711751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5472d4fab7b2STheodore Ts'o } else if (err) 5473c89128a0SJaegeuk Kim goto failed_mount4a; 5474ef7f3835SKalpak Shah 5475b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 547627dd4385SLukas Czerner 54770f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 54786fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 54796fd058f7STheodore Ts'o if (err) { 5480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5481fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5482f9ae9cf5STheodore Ts'o goto failed_mount4a; 5483f9ae9cf5STheodore Ts'o } 54840f5bde1dSJan Kara } 54858016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5486f9ae9cf5STheodore Ts'o 5487f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5488196e402aSHarshad Shirwadkar 5489196e402aSHarshad Shirwadkar /* 5490196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5491196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5492196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5493196e402aSHarshad Shirwadkar */ 549427b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 549527b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5496196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 549727b38686SOjaswin Mujoo else 5498196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 549927b38686SOjaswin Mujoo } 5500196e402aSHarshad Shirwadkar 5501f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5502f9ae9cf5STheodore Ts'o if (err) { 5503f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5504f9ae9cf5STheodore Ts'o err); 5505dcf2d804STao Ma goto failed_mount5; 5506c2774d84SAneesh Kumar K.V } 5507c2774d84SAneesh Kumar K.V 5508027f14f5STheodore Ts'o /* 5509027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5510027f14f5STheodore Ts'o * mballoc is initialized 5511027f14f5STheodore Ts'o */ 5512027f14f5STheodore Ts'o if (sbi->s_journal) 5513027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5514027f14f5STheodore Ts'o ext4_journal_commit_callback; 5515027f14f5STheodore Ts'o 5516d5e72c4eSTheodore Ts'o err = ext4_percpu_param_init(sbi); 5517d5e72c4eSTheodore Ts'o if (err) 5518d5e03cbbSTheodore Ts'o goto failed_mount6; 5519d5e03cbbSTheodore Ts'o 5520e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5521d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5522d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5523d5e03cbbSTheodore Ts'o "unable to initialize " 5524d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 5525d4fab7b2STheodore Ts'o err = -ENOMEM; 5526d5e03cbbSTheodore Ts'o goto failed_mount6; 5527d5e03cbbSTheodore Ts'o } 5528d5e03cbbSTheodore Ts'o 5529bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5530bfff6873SLukas Czerner if (err) 5531dcf2d804STao Ma goto failed_mount6; 5532bfff6873SLukas Czerner 553302f310fcSJan Kara err = ext4_init_orphan_info(sb); 553402f310fcSJan Kara if (err) 5535b4b4fda3SBaokun Li goto failed_mount7; 55369b2ff357SJan Kara #ifdef CONFIG_QUOTA 55379b2ff357SJan Kara /* Enable quota usage during mount. */ 5538bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 55399b2ff357SJan Kara err = ext4_enable_quotas(sb); 55409b2ff357SJan Kara if (err) 5541b4b4fda3SBaokun Li goto failed_mount8; 55429b2ff357SJan Kara } 55439b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 55449b2ff357SJan Kara 5545bc71726cSzhangyi (F) /* 5546bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5547bc71726cSzhangyi (F) * used to detect the metadata async write error. 5548bc71726cSzhangyi (F) */ 5549bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5550*224941e8SAl Viro errseq_check_and_advance(&sb->s_bdev->bd_mapping->wb_err, 5551bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5552617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5553617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5554617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 55559b6641ddSYe Bin /* 55569b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 55579b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 55589b6641ddSYe Bin * checksum in the buffer cache until it is written out and 55599b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 55609b6641ddSYe Bin * after it is mounted can fail. 55619b6641ddSYe Bin */ 55629b6641ddSYe Bin ext4_superblock_csum_set(sb); 55630390131bSFrank Mayhar if (needs_recovery) { 5564b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 556511215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 556611215630SJan Kara if (err) 5567b4b4fda3SBaokun Li goto failed_mount9; 55680390131bSFrank Mayhar } 55690390131bSFrank Mayhar 557070200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 557179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 557270200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 557379add3a3SLukas Czerner 557466e61a9eSTheodore Ts'o if (es->s_error_count) 557566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5576ac27a0ecSDave Kleikamp 5577efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5578efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5579efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5580efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 55811cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 55821cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5583efbed4dcSTheodore Ts'o 5584b4b4fda3SBaokun Li /* Register sysfs after all initializations are complete. */ 5585b4b4fda3SBaokun Li err = ext4_register_sysfs(sb); 5586b4b4fda3SBaokun Li if (err) 5587b4b4fda3SBaokun Li goto failed_mount9; 5588b4b4fda3SBaokun Li 5589ac27a0ecSDave Kleikamp return 0; 5590ac27a0ecSDave Kleikamp 5591b4b4fda3SBaokun Li failed_mount9: 5592f3c1c42eSBaokun Li ext4_quotas_off(sb, EXT4_MAXQUOTAS); 5593b4b4fda3SBaokun Li failed_mount8: __maybe_unused 559402f310fcSJan Kara ext4_release_orphan_info(sb); 5595dcf2d804STao Ma failed_mount7: 5596dcf2d804STao Ma ext4_unregister_li_request(sb); 5597dcf2d804STao Ma failed_mount6: 5598f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 5599dcbf8758SJason Yan ext4_flex_groups_free(sbi); 56001f79467cSJason Yan ext4_percpu_param_destroy(sbi); 560100764937SAzat Khuzhin failed_mount5: 5602f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5603f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5604f9ae9cf5STheodore Ts'o failed_mount4a: 560594bf608aSAl Viro dput(sb->s_root); 560632a9bb57SManish Katiyar sb->s_root = NULL; 560794bf608aSAl Viro failed_mount4: 5608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 56092e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 56102e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 56114c0425ffSMingming Cao failed_mount_wq: 5612dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5613dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 561450c15df6SChengguang Xu 561547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 561647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 561750c15df6SChengguang Xu 56180390131bSFrank Mayhar if (sbi->s_journal) { 5619bb15cea2STheodore Ts'o /* flush s_sb_upd_work before journal destroy. */ 5620bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 5621dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 562247b4a50bSJan Kara sbi->s_journal = NULL; 56230390131bSFrank Mayhar } 562450460fe8SDarrick J. Wong failed_mount3a: 5625d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5626eb68d0e2SZheng Liu failed_mount3: 5627bb15cea2STheodore Ts'o /* flush s_sb_upd_work before sbi destroy */ 5628bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 56292a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5630618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5631a4e6a511SJason Yan ext4_group_desc_free(sbi); 5632ac27a0ecSDave Kleikamp failed_mount: 56330441984aSDarrick J. Wong if (sbi->s_chksum_driver) 56340441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5635c83ad55eSGabriel Krisman Bertazi 56365298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5637f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5638c83ad55eSGabriel Krisman Bertazi #endif 5639c83ad55eSGabriel Krisman Bertazi 5640ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5641856dd6c5SNathan Chancellor for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++) 56420ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5643ac27a0ecSDave Kleikamp #endif 5644ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5645a7a79c29SJason Yan brelse(sbi->s_sbh); 564661ead714SChristian Brauner if (sbi->s_journal_bdev_file) { 564761ead714SChristian Brauner invalidate_bdev(file_bdev(sbi->s_journal_bdev_file)); 564822650a99SChristian Brauner bdev_fput(sbi->s_journal_bdev_file); 56491489dffdSChristoph Hellwig } 5650ac27a0ecSDave Kleikamp out_fail: 565126fb5290SZhihao Cheng invalidate_bdev(sb->s_bdev); 5652ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 5653d4fab7b2STheodore Ts'o return err; 5654ac27a0ecSDave Kleikamp } 5655ac27a0ecSDave Kleikamp 5656cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 56577edfd85bSLukas Czerner { 5658cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 56597edfd85bSLukas Czerner struct ext4_sb_info *sbi; 56607edfd85bSLukas Czerner const char *descr; 5661cebe85d5SLukas Czerner int ret; 56627edfd85bSLukas Czerner 5663cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5664cebe85d5SLukas Czerner if (!sbi) 56657c268d4cSLukas Czerner return -ENOMEM; 5666cebe85d5SLukas Czerner 5667cebe85d5SLukas Czerner fc->s_fs_info = sbi; 56687edfd85bSLukas Czerner 56697edfd85bSLukas Czerner /* Cleanup superblock name */ 56707edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 56717edfd85bSLukas Czerner 56727edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5673cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5674cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 56757edfd85bSLukas Czerner 5676960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 56777edfd85bSLukas Czerner if (ret < 0) 56787edfd85bSLukas Czerner goto free_sbi; 56797edfd85bSLukas Czerner 5680cebe85d5SLukas Czerner if (sbi->s_journal) { 56817edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56827edfd85bSLukas Czerner descr = " journalled data mode"; 56837edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56847edfd85bSLukas Czerner descr = " ordered data mode"; 56857edfd85bSLukas Czerner else 56867edfd85bSLukas Czerner descr = " writeback data mode"; 56877edfd85bSLukas Czerner } else 56887edfd85bSLukas Czerner descr = "out journal"; 56897edfd85bSLukas Czerner 56907edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 56916dcc98fbSTheodore Ts'o ext4_msg(sb, KERN_INFO, "mounted filesystem %pU %s with%s. " 56926dcc98fbSTheodore Ts'o "Quota mode: %s.", &sb->s_uuid, 56936dcc98fbSTheodore Ts'o sb_rdonly(sb) ? "ro" : "r/w", descr, 5694bb0fbc78SLukas Czerner ext4_quota_mode(sb)); 56957edfd85bSLukas Czerner 5696eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5697827891a3STheodore Ts'o ext4_update_overhead(sb, false); 56987edfd85bSLukas Czerner return 0; 5699cebe85d5SLukas Czerner 57007edfd85bSLukas Czerner free_sbi: 57017edfd85bSLukas Czerner ext4_free_sbi(sbi); 5702cebe85d5SLukas Czerner fc->s_fs_info = NULL; 57037edfd85bSLukas Czerner return ret; 57047edfd85bSLukas Czerner } 57057edfd85bSLukas Czerner 5706cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5707cebe85d5SLukas Czerner { 5708cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5709cebe85d5SLukas Czerner } 5710cebe85d5SLukas Czerner 5711ac27a0ecSDave Kleikamp /* 5712ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5713ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5714ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5715ac27a0ecSDave Kleikamp */ 5716617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5717ac27a0ecSDave Kleikamp { 5718617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5719ac27a0ecSDave Kleikamp 5720ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 572130773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 572230773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 57236866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5724ac27a0ecSDave Kleikamp 5725a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5726ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5727dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5728ac27a0ecSDave Kleikamp else 5729dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 57305bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 57315bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 57325bf5683aSHidehiro Kawai else 57335bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 573472945058SZhang Yi /* 573572945058SZhang Yi * Always enable journal cycle record option, letting the journal 573672945058SZhang Yi * records log transactions continuously between each mount. 573772945058SZhang Yi */ 573872945058SZhang Yi journal->j_flags |= JBD2_CYCLE_RECORD; 5739a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5740ac27a0ecSDave Kleikamp } 5741ac27a0ecSDave Kleikamp 5742c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5743ac27a0ecSDave Kleikamp unsigned int journal_inum) 5744ac27a0ecSDave Kleikamp { 5745ac27a0ecSDave Kleikamp struct inode *journal_inode; 5746ac27a0ecSDave Kleikamp 5747c6cb7e77SEric Whitney /* 5748c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5749c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5750c6cb7e77SEric Whitney * will try to delete it. 5751c6cb7e77SEric Whitney */ 57528a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 57531d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5754b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5755ee5c8071SZhang Yi return ERR_CAST(journal_inode); 5756ac27a0ecSDave Kleikamp } 5757ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5758ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5759ac27a0ecSDave Kleikamp iput(journal_inode); 5760b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5761ee5c8071SZhang Yi return ERR_PTR(-EFSCORRUPTED); 5762ac27a0ecSDave Kleikamp } 5763105c78e1SEric Biggers if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) { 5764b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5765ac27a0ecSDave Kleikamp iput(journal_inode); 5766ee5c8071SZhang Yi return ERR_PTR(-EFSCORRUPTED); 5767c6cb7e77SEric Whitney } 5768c6cb7e77SEric Whitney 5769c6cb7e77SEric Whitney ext4_debug("Journal inode found at %p: %lld bytes\n", 5770c6cb7e77SEric Whitney journal_inode, journal_inode->i_size); 5771c6cb7e77SEric Whitney return journal_inode; 5772c6cb7e77SEric Whitney } 5773c6cb7e77SEric Whitney 577462913ae9STheodore Ts'o static int ext4_journal_bmap(journal_t *journal, sector_t *block) 577562913ae9STheodore Ts'o { 577662913ae9STheodore Ts'o struct ext4_map_blocks map; 577762913ae9STheodore Ts'o int ret; 577862913ae9STheodore Ts'o 577962913ae9STheodore Ts'o if (journal->j_inode == NULL) 578062913ae9STheodore Ts'o return 0; 578162913ae9STheodore Ts'o 578262913ae9STheodore Ts'o map.m_lblk = *block; 578362913ae9STheodore Ts'o map.m_len = 1; 578462913ae9STheodore Ts'o ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0); 578562913ae9STheodore Ts'o if (ret <= 0) { 578662913ae9STheodore Ts'o ext4_msg(journal->j_inode->i_sb, KERN_CRIT, 578762913ae9STheodore Ts'o "journal bmap failed: block %llu ret %d\n", 578862913ae9STheodore Ts'o *block, ret); 578962913ae9STheodore Ts'o jbd2_journal_abort(journal, ret ? ret : -EIO); 579062913ae9STheodore Ts'o return ret; 579162913ae9STheodore Ts'o } 579262913ae9STheodore Ts'o *block = map.m_pblk; 579362913ae9STheodore Ts'o return 0; 579462913ae9STheodore Ts'o } 579562913ae9STheodore Ts'o 5796ee5c8071SZhang Yi static journal_t *ext4_open_inode_journal(struct super_block *sb, 5797c6cb7e77SEric Whitney unsigned int journal_inum) 5798c6cb7e77SEric Whitney { 5799c6cb7e77SEric Whitney struct inode *journal_inode; 5800c6cb7e77SEric Whitney journal_t *journal; 5801c6cb7e77SEric Whitney 5802c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5803ee5c8071SZhang Yi if (IS_ERR(journal_inode)) 5804ee5c8071SZhang Yi return ERR_CAST(journal_inode); 5805ac27a0ecSDave Kleikamp 5806dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 58078e6cf5fbSZhang Yi if (IS_ERR(journal)) { 5808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5809ac27a0ecSDave Kleikamp iput(journal_inode); 5810ee5c8071SZhang Yi return ERR_CAST(journal); 5811ac27a0ecSDave Kleikamp } 5812ac27a0ecSDave Kleikamp journal->j_private = sb; 581362913ae9STheodore Ts'o journal->j_bmap = ext4_journal_bmap; 5814617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5815ac27a0ecSDave Kleikamp return journal; 5816ac27a0ecSDave Kleikamp } 5817ac27a0ecSDave Kleikamp 581861ead714SChristian Brauner static struct file *ext4_get_journal_blkdev(struct super_block *sb, 5819bc74e6a3SZhang Yi dev_t j_dev, ext4_fsblk_t *j_start, 5820bc74e6a3SZhang Yi ext4_fsblk_t *j_len) 5821ac27a0ecSDave Kleikamp { 5822ac27a0ecSDave Kleikamp struct buffer_head *bh; 5823bc74e6a3SZhang Yi struct block_device *bdev; 582461ead714SChristian Brauner struct file *bdev_file; 5825ac27a0ecSDave Kleikamp int hblock, blocksize; 5826617ba13bSMingming Cao ext4_fsblk_t sb_block; 5827ac27a0ecSDave Kleikamp unsigned long offset; 5828617ba13bSMingming Cao struct ext4_super_block *es; 5829ee5c8071SZhang Yi int errno; 58300390131bSFrank Mayhar 583161ead714SChristian Brauner bdev_file = bdev_file_open_by_dev(j_dev, 5832afde134bSJan Kara BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES, 5833d577c8aaSJan Kara sb, &fs_holder_ops); 583461ead714SChristian Brauner if (IS_ERR(bdev_file)) { 5835bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, 5836bc74e6a3SZhang Yi "failed to open journal device unknown-block(%u,%u) %ld", 583761ead714SChristian Brauner MAJOR(j_dev), MINOR(j_dev), PTR_ERR(bdev_file)); 583861ead714SChristian Brauner return bdev_file; 5839bc74e6a3SZhang Yi } 5840ac27a0ecSDave Kleikamp 584161ead714SChristian Brauner bdev = file_bdev(bdev_file); 5842ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5843e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5844ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5846b31e1552SEric Sandeen "blocksize too small for journal device"); 5847ee5c8071SZhang Yi errno = -EINVAL; 5848ac27a0ecSDave Kleikamp goto out_bdev; 5849ac27a0ecSDave Kleikamp } 5850ac27a0ecSDave Kleikamp 5851617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5852617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5853ead083aeSAl Viro set_blocksize(bdev_file, blocksize); 5854bc74e6a3SZhang Yi bh = __bread(bdev, sb_block, blocksize); 5855bc74e6a3SZhang Yi if (!bh) { 5856b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5857b31e1552SEric Sandeen "external journal"); 5858ee5c8071SZhang Yi errno = -EINVAL; 5859ac27a0ecSDave Kleikamp goto out_bdev; 5860ac27a0ecSDave Kleikamp } 5861ac27a0ecSDave Kleikamp 58622716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5863617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5864ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5865617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5866bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, "external journal has bad superblock"); 5867ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5868bc74e6a3SZhang Yi goto out_bh; 5869ac27a0ecSDave Kleikamp } 5870ac27a0ecSDave Kleikamp 5871df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5872df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5873df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5874bc74e6a3SZhang Yi ext4_msg(sb, KERN_ERR, "external journal has corrupt superblock"); 5875ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5876bc74e6a3SZhang Yi goto out_bh; 5877df4763beSDarrick J. Wong } 5878df4763beSDarrick J. Wong 5879617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5880b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5881ee5c8071SZhang Yi errno = -EFSCORRUPTED; 5882bc74e6a3SZhang Yi goto out_bh; 5883ac27a0ecSDave Kleikamp } 5884ac27a0ecSDave Kleikamp 5885bc74e6a3SZhang Yi *j_start = sb_block + 1; 5886bc74e6a3SZhang Yi *j_len = ext4_blocks_count(es); 5887ac27a0ecSDave Kleikamp brelse(bh); 588861ead714SChristian Brauner return bdev_file; 5889ac27a0ecSDave Kleikamp 5890bc74e6a3SZhang Yi out_bh: 5891bc74e6a3SZhang Yi brelse(bh); 5892bc74e6a3SZhang Yi out_bdev: 589322650a99SChristian Brauner bdev_fput(bdev_file); 5894ee5c8071SZhang Yi return ERR_PTR(errno); 5895ac27a0ecSDave Kleikamp } 5896ac27a0ecSDave Kleikamp 5897ee5c8071SZhang Yi static journal_t *ext4_open_dev_journal(struct super_block *sb, 5898bc74e6a3SZhang Yi dev_t j_dev) 5899bc74e6a3SZhang Yi { 5900bc74e6a3SZhang Yi journal_t *journal; 5901bc74e6a3SZhang Yi ext4_fsblk_t j_start; 5902bc74e6a3SZhang Yi ext4_fsblk_t j_len; 590361ead714SChristian Brauner struct file *bdev_file; 5904ee5c8071SZhang Yi int errno = 0; 5905ac27a0ecSDave Kleikamp 590661ead714SChristian Brauner bdev_file = ext4_get_journal_blkdev(sb, j_dev, &j_start, &j_len); 590761ead714SChristian Brauner if (IS_ERR(bdev_file)) 590861ead714SChristian Brauner return ERR_CAST(bdev_file); 5909bc74e6a3SZhang Yi 591061ead714SChristian Brauner journal = jbd2_journal_init_dev(file_bdev(bdev_file), sb->s_bdev, j_start, 5911bc74e6a3SZhang Yi j_len, sb->s_blocksize); 59128e6cf5fbSZhang Yi if (IS_ERR(journal)) { 5913b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5914ee5c8071SZhang Yi errno = PTR_ERR(journal); 5915ac27a0ecSDave Kleikamp goto out_bdev; 5916ac27a0ecSDave Kleikamp } 5917ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5918b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5919b31e1552SEric Sandeen "user (unsupported) - %d", 5920ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5921ee5c8071SZhang Yi errno = -EINVAL; 5922ac27a0ecSDave Kleikamp goto out_journal; 5923ac27a0ecSDave Kleikamp } 5924bc74e6a3SZhang Yi journal->j_private = sb; 592561ead714SChristian Brauner EXT4_SB(sb)->s_journal_bdev_file = bdev_file; 5926617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5927ac27a0ecSDave Kleikamp return journal; 59280b8e58a1SAndreas Dilger 5929ac27a0ecSDave Kleikamp out_journal: 5930dab291afSMingming Cao jbd2_journal_destroy(journal); 5931ac27a0ecSDave Kleikamp out_bdev: 593222650a99SChristian Brauner bdev_fput(bdev_file); 5933ee5c8071SZhang Yi return ERR_PTR(errno); 5934ac27a0ecSDave Kleikamp } 5935ac27a0ecSDave Kleikamp 5936617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5937617ba13bSMingming Cao struct ext4_super_block *es, 5938ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5939ac27a0ecSDave Kleikamp { 5940ac27a0ecSDave Kleikamp journal_t *journal; 5941ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5942ac27a0ecSDave Kleikamp dev_t journal_dev; 5943ac27a0ecSDave Kleikamp int err = 0; 5944ac27a0ecSDave Kleikamp int really_read_only; 5945273108faSLukas Czerner int journal_dev_ro; 5946ac27a0ecSDave Kleikamp 594711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 594811215630SJan Kara return -EFSCORRUPTED; 59490390131bSFrank Mayhar 5950ac27a0ecSDave Kleikamp if (journal_devnum && 5951ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5952b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5953b31e1552SEric Sandeen "numbers have changed"); 5954ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5955ac27a0ecSDave Kleikamp } else 5956ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5957ac27a0ecSDave Kleikamp 5958273108faSLukas Czerner if (journal_inum && journal_dev) { 5959273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5960273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5961273108faSLukas Czerner return -EINVAL; 5962273108faSLukas Czerner } 5963273108faSLukas Czerner 5964273108faSLukas Czerner if (journal_inum) { 5965ee5c8071SZhang Yi journal = ext4_open_inode_journal(sb, journal_inum); 5966ee5c8071SZhang Yi if (IS_ERR(journal)) 5967ee5c8071SZhang Yi return PTR_ERR(journal); 5968273108faSLukas Czerner } else { 5969ee5c8071SZhang Yi journal = ext4_open_dev_journal(sb, journal_dev); 5970ee5c8071SZhang Yi if (IS_ERR(journal)) 5971ee5c8071SZhang Yi return PTR_ERR(journal); 5972273108faSLukas Czerner } 5973273108faSLukas Czerner 5974273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5975273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5976273108faSLukas Czerner 5977273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5978273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5979273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5980273108faSLukas Czerner err = -EROFS; 5981273108faSLukas Czerner goto err_out; 5982273108faSLukas Czerner } 5983ac27a0ecSDave Kleikamp 5984ac27a0ecSDave Kleikamp /* 5985ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5986ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5987ac27a0ecSDave Kleikamp * can get read-write access to the device. 5988ac27a0ecSDave Kleikamp */ 5989e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5990bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5991b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5992b31e1552SEric Sandeen "required on readonly filesystem"); 5993ac27a0ecSDave Kleikamp if (really_read_only) { 5994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5995d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5996d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5997273108faSLukas Czerner err = -EROFS; 5998273108faSLukas Czerner goto err_out; 5999ac27a0ecSDave Kleikamp } 6000b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 6001b31e1552SEric Sandeen "be enabled during recovery"); 6002ac27a0ecSDave Kleikamp } 6003ac27a0ecSDave Kleikamp } 6004ac27a0ecSDave Kleikamp 600590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 6006b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 60074776004fSTheodore Ts'o 6008e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 6009dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 60101c13d5c0STheodore Ts'o if (!err) { 60111c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 60122ef6c32aSTheodore Ts'o __le16 orig_state; 60132ef6c32aSTheodore Ts'o bool changed = false; 6014eee00237SYe Bin 60151c13d5c0STheodore Ts'o if (save) 60161c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 60171c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 6018dab291afSMingming Cao err = jbd2_journal_load(journal); 60192ef6c32aSTheodore Ts'o if (save && memcmp(((char *) es) + EXT4_S_ERR_START, 60202ef6c32aSTheodore Ts'o save, EXT4_S_ERR_LEN)) { 60211c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 60221c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 60232ef6c32aSTheodore Ts'o changed = true; 60242ef6c32aSTheodore Ts'o } 60251c13d5c0STheodore Ts'o kfree(save); 60262ef6c32aSTheodore Ts'o orig_state = es->s_state; 6027eee00237SYe Bin es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state & 6028eee00237SYe Bin EXT4_ERROR_FS); 60292ef6c32aSTheodore Ts'o if (orig_state != es->s_state) 60302ef6c32aSTheodore Ts'o changed = true; 6031eee00237SYe Bin /* Write out restored error information to the superblock */ 60322ef6c32aSTheodore Ts'o if (changed && !really_read_only) { 6033eee00237SYe Bin int err2; 6034eee00237SYe Bin err2 = ext4_commit_super(sb); 6035eee00237SYe Bin err = err ? : err2; 6036eee00237SYe Bin } 60371c13d5c0STheodore Ts'o } 6038ac27a0ecSDave Kleikamp 6039ac27a0ecSDave Kleikamp if (err) { 6040b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 6041273108faSLukas Czerner goto err_out; 6042ac27a0ecSDave Kleikamp } 6043ac27a0ecSDave Kleikamp 6044617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 604511215630SJan Kara err = ext4_clear_journal_err(sb, es); 604611215630SJan Kara if (err) { 604711215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 604811215630SJan Kara jbd2_journal_destroy(journal); 604911215630SJan Kara return err; 605011215630SJan Kara } 6051ac27a0ecSDave Kleikamp 6052c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 6053ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 6054ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 60553039d8b8SBaokun Li ext4_commit_super(sb); 60563039d8b8SBaokun Li } 60573039d8b8SBaokun Li if (!really_read_only && journal_inum && 60583039d8b8SBaokun Li journal_inum != le32_to_cpu(es->s_journal_inum)) { 60593039d8b8SBaokun Li es->s_journal_inum = cpu_to_le32(journal_inum); 60604392fbc4SJan Kara ext4_commit_super(sb); 6061ac27a0ecSDave Kleikamp } 6062ac27a0ecSDave Kleikamp 6063ac27a0ecSDave Kleikamp return 0; 6064273108faSLukas Czerner 6065273108faSLukas Czerner err_out: 6066273108faSLukas Czerner jbd2_journal_destroy(journal); 6067273108faSLukas Czerner return err; 6068ac27a0ecSDave Kleikamp } 6069ac27a0ecSDave Kleikamp 60702d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 60712d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 6072ac27a0ecSDave Kleikamp { 6073c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 6074e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 6075e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 6076ac27a0ecSDave Kleikamp 607705c2c00fSJan Kara lock_buffer(sbh); 6078a17712c8SJon Derrick /* 607971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 608071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 608171290b36STheodore Ts'o * write time when we are mounting the root file system 608271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 608371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 608471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 608571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 608671290b36STheodore Ts'o * to complain and force a full file system check. 608771290b36STheodore Ts'o */ 6088d5d020b3SJan Kara if (!sb_rdonly(sb)) 60896a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 6090afc32f7eSTheodore Ts'o es->s_kbytes_written = 6091e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 60928446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 6093e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 6094e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 609557042651STheodore Ts'o ext4_free_blocks_count_set(es, 6096e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 6097e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 6098e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 60997f93cff9STheodore Ts'o es->s_free_inodes_count = 61007f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 6101e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 6102c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 6103c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 6104c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 6105c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6106c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 6107c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 6108c92dc856SJan Kara &es->s_first_error_time_hi, 6109c92dc856SJan Kara sbi->s_first_error_time); 6110744a5638SJustin Stitt strtomem_pad(es->s_first_error_func, 6111744a5638SJustin Stitt sbi->s_first_error_func, 0); 6112c92dc856SJan Kara es->s_first_error_line = 6113c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 6114c92dc856SJan Kara es->s_first_error_ino = 6115c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 6116c92dc856SJan Kara es->s_first_error_block = 6117c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 6118c92dc856SJan Kara es->s_first_error_errcode = 6119c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 6120c92dc856SJan Kara } 6121c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 6122c92dc856SJan Kara &es->s_last_error_time_hi, 6123c92dc856SJan Kara sbi->s_last_error_time); 6124744a5638SJustin Stitt strtomem_pad(es->s_last_error_func, sbi->s_last_error_func, 0); 6125c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 6126c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 6127c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 6128c92dc856SJan Kara es->s_last_error_errcode = 6129c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 6130c92dc856SJan Kara /* 6131c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 6132c92dc856SJan Kara * started already 6133c92dc856SJan Kara */ 6134c92dc856SJan Kara if (!es->s_error_count) 6135c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 6136c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 6137c92dc856SJan Kara sbi->s_add_error_count = 0; 6138c92dc856SJan Kara } 6139c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 6140c92dc856SJan Kara 614106db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 61422d01ddc8SJan Kara unlock_buffer(sbh); 61432d01ddc8SJan Kara } 61442d01ddc8SJan Kara 61452d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 61462d01ddc8SJan Kara { 61472d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 61482d01ddc8SJan Kara 6149f88f1466SFengnan Chang if (!sbh) 6150f88f1466SFengnan Chang return -EINVAL; 61512d01ddc8SJan Kara 61522d01ddc8SJan Kara ext4_update_super(sb); 61532d01ddc8SJan Kara 615415baa7dcSZhang Yi lock_buffer(sbh); 615515baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 615615baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 615715baa7dcSZhang Yi unlock_buffer(sbh); 615815baa7dcSZhang Yi return -EIO; 615915baa7dcSZhang Yi } 616015baa7dcSZhang Yi 6161e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 61624743f839SPranay Kr. Srivastava /* 61634743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 61644743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 61654743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 61664743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 61674743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 61684743f839SPranay Kr. Srivastava * write and hope for the best. 61694743f839SPranay Kr. Srivastava */ 61704743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 61714743f839SPranay Kr. Srivastava "superblock detected"); 61724743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 61734743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 61744743f839SPranay Kr. Srivastava } 617515baa7dcSZhang Yi get_bh(sbh); 617615baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 617715baa7dcSZhang Yi clear_buffer_dirty(sbh); 617815baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 61791420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 61801420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 618115baa7dcSZhang Yi wait_on_buffer(sbh); 6182c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6183b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6184b31e1552SEric Sandeen "superblock"); 6185914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6186914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 618715baa7dcSZhang Yi return -EIO; 6188914258bfSTheodore Ts'o } 618915baa7dcSZhang Yi return 0; 6190ac27a0ecSDave Kleikamp } 6191ac27a0ecSDave Kleikamp 6192ac27a0ecSDave Kleikamp /* 6193ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6194ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6195ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6196ac27a0ecSDave Kleikamp */ 619711215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6198617ba13bSMingming Cao struct ext4_super_block *es) 6199ac27a0ecSDave Kleikamp { 620011215630SJan Kara int err; 6201617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6202ac27a0ecSDave Kleikamp 6203e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 620411215630SJan Kara if (journal != NULL) { 620511215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 620611215630SJan Kara "mounted!"); 620711215630SJan Kara return -EFSCORRUPTED; 620811215630SJan Kara } 620911215630SJan Kara return 0; 62100390131bSFrank Mayhar } 6211dab291afSMingming Cao jbd2_journal_lock_updates(journal); 621201d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 621311215630SJan Kara if (err < 0) 62147ffe1ea8SHidehiro Kawai goto out; 62157ffe1ea8SHidehiro Kawai 621602f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 621702f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 621802f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 621902f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 622002f310fcSJan Kara err = -EFSCORRUPTED; 622102f310fcSJan Kara goto out; 622202f310fcSJan Kara } 6223e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 622402f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 62254392fbc4SJan Kara ext4_commit_super(sb); 6226ac27a0ecSDave Kleikamp } 62277ffe1ea8SHidehiro Kawai out: 6228dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 622911215630SJan Kara return err; 6230ac27a0ecSDave Kleikamp } 6231ac27a0ecSDave Kleikamp 6232ac27a0ecSDave Kleikamp /* 6233ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6234ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6235ac27a0ecSDave Kleikamp * main filesystem now. 6236ac27a0ecSDave Kleikamp */ 623711215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6238617ba13bSMingming Cao struct ext4_super_block *es) 6239ac27a0ecSDave Kleikamp { 6240ac27a0ecSDave Kleikamp journal_t *journal; 6241ac27a0ecSDave Kleikamp int j_errno; 6242ac27a0ecSDave Kleikamp const char *errstr; 6243ac27a0ecSDave Kleikamp 624411215630SJan Kara if (!ext4_has_feature_journal(sb)) { 624511215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 624611215630SJan Kara return -EFSCORRUPTED; 624711215630SJan Kara } 62480390131bSFrank Mayhar 6249617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6250ac27a0ecSDave Kleikamp 6251ac27a0ecSDave Kleikamp /* 6252ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6253617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6254ac27a0ecSDave Kleikamp */ 6255ac27a0ecSDave Kleikamp 6256dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6257ac27a0ecSDave Kleikamp if (j_errno) { 6258ac27a0ecSDave Kleikamp char nbuf[16]; 6259ac27a0ecSDave Kleikamp 6260617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 626112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6262ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 6263ac27a0ecSDave Kleikamp 6264617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6265617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 6266f57886caSYe Bin j_errno = ext4_commit_super(sb); 6267f57886caSYe Bin if (j_errno) 6268f57886caSYe Bin return j_errno; 6269f57886caSYe Bin ext4_warning(sb, "Marked fs in need of filesystem check."); 6270ac27a0ecSDave Kleikamp 6271dab291afSMingming Cao jbd2_journal_clear_err(journal); 6272d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6273ac27a0ecSDave Kleikamp } 627411215630SJan Kara return 0; 6275ac27a0ecSDave Kleikamp } 6276ac27a0ecSDave Kleikamp 6277ac27a0ecSDave Kleikamp /* 6278ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6279ac27a0ecSDave Kleikamp * and wait on the commit. 6280ac27a0ecSDave Kleikamp */ 6281617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6282ac27a0ecSDave Kleikamp { 6283889860e4SJan Kara return ext4_journal_force_commit(EXT4_SB(sb)->s_journal); 6284ac27a0ecSDave Kleikamp } 6285ac27a0ecSDave Kleikamp 6286617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6287ac27a0ecSDave Kleikamp { 628814ce0cb4STheodore Ts'o int ret = 0; 62899eddacf9SJan Kara tid_t target; 629006a407f1SDmitry Monakhov bool needs_barrier = false; 62918d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6292ac27a0ecSDave Kleikamp 6293eb8ab444SJan Kara if (unlikely(ext4_forced_shutdown(sb))) 62940db1ff22STheodore Ts'o return 0; 62950db1ff22STheodore Ts'o 62969bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 62972e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6298a1177825SJan Kara /* 6299a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6300a1177825SJan Kara * no dirty dquots 6301a1177825SJan Kara */ 6302a1177825SJan Kara dquot_writeback_dquots(sb, -1); 630306a407f1SDmitry Monakhov /* 630406a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 630506a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 630606a407f1SDmitry Monakhov * transaction_commit will do it for us. 630706a407f1SDmitry Monakhov */ 6308bda32530STheodore Ts'o if (sbi->s_journal) { 630906a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 631006a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 631106a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 631206a407f1SDmitry Monakhov needs_barrier = true; 631306a407f1SDmitry Monakhov 63148d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6315ac27a0ecSDave Kleikamp if (wait) 6316bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6317bda32530STheodore Ts'o target); 63180390131bSFrank Mayhar } 6319bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6320bda32530STheodore Ts'o needs_barrier = true; 632106a407f1SDmitry Monakhov if (needs_barrier) { 632206a407f1SDmitry Monakhov int err; 6323c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 632406a407f1SDmitry Monakhov if (!ret) 632506a407f1SDmitry Monakhov ret = err; 632606a407f1SDmitry Monakhov } 632706a407f1SDmitry Monakhov 632806a407f1SDmitry Monakhov return ret; 632906a407f1SDmitry Monakhov } 633006a407f1SDmitry Monakhov 6331ac27a0ecSDave Kleikamp /* 6332ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6333ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6334be4f27d3SYongqiang Yang * 6335be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 63368e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 63378e8ad8a5SJan Kara * modifications. 6338ac27a0ecSDave Kleikamp */ 6339c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6340ac27a0ecSDave Kleikamp { 6341c4be0c1dSTakashi Sato int error = 0; 634298175720SJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6343ac27a0ecSDave Kleikamp 6344bb044576STheodore Ts'o if (journal) { 6345ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6346dab291afSMingming Cao jbd2_journal_lock_updates(journal); 63477ffe1ea8SHidehiro Kawai 63487ffe1ea8SHidehiro Kawai /* 6349bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6350bb044576STheodore Ts'o * flush the journal. 63517ffe1ea8SHidehiro Kawai */ 635201d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 63536b0310fbSEric Sandeen if (error < 0) 63546b0310fbSEric Sandeen goto out; 6355ac27a0ecSDave Kleikamp 6356ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6357e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 635802f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 635902f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6360c642dc9eSEric Sandeen } 6361c642dc9eSEric Sandeen 63624392fbc4SJan Kara error = ext4_commit_super(sb); 63636b0310fbSEric Sandeen out: 6364bb044576STheodore Ts'o if (journal) 63658e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6366bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 63676b0310fbSEric Sandeen return error; 6368ac27a0ecSDave Kleikamp } 6369ac27a0ecSDave Kleikamp 6370ac27a0ecSDave Kleikamp /* 6371ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6372ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6373ac27a0ecSDave Kleikamp */ 6374c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6375ac27a0ecSDave Kleikamp { 6376eb8ab444SJan Kara if (ext4_forced_shutdown(sb)) 63779ca92389STheodore Ts'o return 0; 63789ca92389STheodore Ts'o 6379c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 63809ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6381e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 638202f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 638302f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6384c642dc9eSEric Sandeen } 6385c642dc9eSEric Sandeen 63864392fbc4SJan Kara ext4_commit_super(sb); 6387c4be0c1dSTakashi Sato return 0; 6388ac27a0ecSDave Kleikamp } 6389ac27a0ecSDave Kleikamp 6390673c6100STheodore Ts'o /* 6391673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6392673c6100STheodore Ts'o */ 6393673c6100STheodore Ts'o struct ext4_mount_options { 6394673c6100STheodore Ts'o unsigned long s_mount_opt; 6395a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 639608cefc7aSEric W. Biederman kuid_t s_resuid; 639708cefc7aSEric W. Biederman kgid_t s_resgid; 6398673c6100STheodore Ts'o unsigned long s_commit_interval; 6399673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6400673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6401673c6100STheodore Ts'o int s_jquota_fmt; 6402a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6403673c6100STheodore Ts'o #endif 6404673c6100STheodore Ts'o }; 6405673c6100STheodore Ts'o 6406960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6407ac27a0ecSDave Kleikamp { 64087edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6409617ba13bSMingming Cao struct ext4_super_block *es; 6410617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6411960e0ab6SLukas Czerner unsigned long old_sb_flags; 6412617ba13bSMingming Cao struct ext4_mount_options old_opts; 64138a266467STheodore Ts'o ext4_group_t g; 6414c5e06d10SJohann Lombardi int err = 0; 6415745f17a4SBaokun Li int alloc_ctx; 6416ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 64173bbef91bSAustin Kim int enable_quota = 0; 641803dafb5fSChen Gang int i, j; 641933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6420ac27a0ecSDave Kleikamp #endif 6421b237e304SHarshad Shirwadkar 642221ac738eSChengguang Xu 6423ac27a0ecSDave Kleikamp /* Store the original options */ 6424ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6425ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6426a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6427ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6428ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6429ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 643030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 643130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6432ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6433ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6434a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 643503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 643633458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 643733458eabSTheodore Ts'o 643833458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 643903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 644003dafb5fSChen Gang for (j = 0; j < i; j++) 644103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 644203dafb5fSChen Gang return -ENOMEM; 644303dafb5fSChen Gang } 644403dafb5fSChen Gang } else 644503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6446ac27a0ecSDave Kleikamp #endif 6447e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6448b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 64497edfd85bSLukas Czerner ctx->journal_ioprio = 6450b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6451e4e58e5dSOjaswin Mujoo else 6452e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6453e4e58e5dSOjaswin Mujoo 6454e4e58e5dSOjaswin Mujoo } 6455ac27a0ecSDave Kleikamp 6456745f17a4SBaokun Li /* 6457745f17a4SBaokun Li * Changing the DIOREAD_NOLOCK or DELALLOC mount options may cause 6458745f17a4SBaokun Li * two calls to ext4_should_dioread_nolock() to return inconsistent 6459745f17a4SBaokun Li * values, triggering WARN_ON in ext4_add_complete_io(). we grab 6460745f17a4SBaokun Li * here s_writepages_rwsem to avoid race between writepages ops and 6461745f17a4SBaokun Li * remount. 6462745f17a4SBaokun Li */ 6463745f17a4SBaokun Li alloc_ctx = ext4_writepages_down_write(sb); 64647edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6465745f17a4SBaokun Li ext4_writepages_up_write(sb, alloc_ctx); 6466ac27a0ecSDave Kleikamp 64676b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 64686b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 64696b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 64702d5b86e0SEric Sandeen "during remount not supported; ignoring"); 64712d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6472c6d3d56dSDarrick J. Wong } 6473c6d3d56dSDarrick J. Wong 64746ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 64756ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 64766ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64776ae6514bSPiotr Sarna "both data=journal and delalloc"); 64786ae6514bSPiotr Sarna err = -EINVAL; 64796ae6514bSPiotr Sarna goto restore_opts; 64806ae6514bSPiotr Sarna } 64816ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 64826ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 64836ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 64846ae6514bSPiotr Sarna err = -EINVAL; 64856ae6514bSPiotr Sarna goto restore_opts; 64866ae6514bSPiotr Sarna } 6487ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6488ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6489ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6490ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6491ab04df78SJan Kara err = -EINVAL; 6492ab04df78SJan Kara goto restore_opts; 6493ab04df78SJan Kara } 6494923ae0ffSRoss Zwisler } 6495923ae0ffSRoss Zwisler 6496cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6497cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6498cdb7ee4cSTahsin Erdogan err = -EINVAL; 6499cdb7ee4cSTahsin Erdogan goto restore_opts; 6500cdb7ee4cSTahsin Erdogan } 6501cdb7ee4cSTahsin Erdogan 650222b8d707SJan Kara if (test_opt2(sb, ABORT)) 6503124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6504ac27a0ecSDave Kleikamp 65051751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 65061751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6507ac27a0ecSDave Kleikamp 6508ac27a0ecSDave Kleikamp es = sbi->s_es; 6509ac27a0ecSDave Kleikamp 6510b3881f74STheodore Ts'o if (sbi->s_journal) { 6511617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 65127edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6513b3881f74STheodore Ts'o } 6514ac27a0ecSDave Kleikamp 6515c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6516bb15cea2STheodore Ts'o flush_work(&sbi->s_sb_upd_work); 6517c92dc856SJan Kara 6518960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 651995257987SJan Kara if (ext4_forced_shutdown(sb)) { 6520ac27a0ecSDave Kleikamp err = -EROFS; 6521ac27a0ecSDave Kleikamp goto restore_opts; 6522ac27a0ecSDave Kleikamp } 6523ac27a0ecSDave Kleikamp 6524960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 652538c03b34STheodore Ts'o err = sync_filesystem(sb); 652638c03b34STheodore Ts'o if (err < 0) 652738c03b34STheodore Ts'o goto restore_opts; 65280f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 65290f0dd62fSChristoph Hellwig if (err < 0) 6530c79d967dSChristoph Hellwig goto restore_opts; 6531c79d967dSChristoph Hellwig 6532ac27a0ecSDave Kleikamp /* 6533ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6534ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6535ac27a0ecSDave Kleikamp */ 65361751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6537ac27a0ecSDave Kleikamp 6538ac27a0ecSDave Kleikamp /* 6539ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6540ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6541ac27a0ecSDave Kleikamp * mark the partition as valid again. 6542ac27a0ecSDave Kleikamp */ 6543617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6544617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6545ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6546ac27a0ecSDave Kleikamp 654711215630SJan Kara if (sbi->s_journal) { 654811215630SJan Kara /* 654911215630SJan Kara * We let remount-ro finish even if marking fs 655011215630SJan Kara * as clean failed... 655111215630SJan Kara */ 6552617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 655311215630SJan Kara } 6554ac27a0ecSDave Kleikamp } else { 6555a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6556e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 65572cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6558ac27a0ecSDave Kleikamp err = -EROFS; 6559ac27a0ecSDave Kleikamp goto restore_opts; 6560ac27a0ecSDave Kleikamp } 6561ead6596bSEric Sandeen /* 65628a266467STheodore Ts'o * Make sure the group descriptor checksums 65630b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 65648a266467STheodore Ts'o */ 65658a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 65668a266467STheodore Ts'o struct ext4_group_desc *gdp = 65678a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 65688a266467STheodore Ts'o 6569feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6570b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6571b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6572e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 65738a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 65746a797d27SDarrick J. Wong err = -EFSBADCRC; 65758a266467STheodore Ts'o goto restore_opts; 65768a266467STheodore Ts'o } 65778a266467STheodore Ts'o } 65788a266467STheodore Ts'o 65798a266467STheodore Ts'o /* 6580ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6581ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6582ead6596bSEric Sandeen * require a full umount/remount for now. 6583ead6596bSEric Sandeen */ 658402f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6585b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6586ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6587ead6596bSEric Sandeen "orphan inode list. Please " 6588b31e1552SEric Sandeen "umount/remount instead"); 6589ead6596bSEric Sandeen err = -EINVAL; 6590ead6596bSEric Sandeen goto restore_opts; 6591ead6596bSEric Sandeen } 6592ead6596bSEric Sandeen 6593ac27a0ecSDave Kleikamp /* 6594ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6595ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6596ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6597ac27a0ecSDave Kleikamp * the partition.) 6598ac27a0ecSDave Kleikamp */ 659911215630SJan Kara if (sbi->s_journal) { 660011215630SJan Kara err = ext4_clear_journal_err(sb, es); 660111215630SJan Kara if (err) 660211215630SJan Kara goto restore_opts; 660311215630SJan Kara } 6604c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6605c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6606c89128a0SJaegeuk Kim 6607c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6608c89128a0SJaegeuk Kim if (err) 6609c89128a0SJaegeuk Kim goto restore_opts; 6610c89128a0SJaegeuk Kim 66111b292439STheodore Ts'o sb->s_flags &= ~SB_RDONLY; 66123b50d501STheodore Ts'o if (ext4_has_feature_mmp(sb)) { 66133b50d501STheodore Ts'o err = ext4_multi_mount_protect(sb, 66143b50d501STheodore Ts'o le64_to_cpu(es->s_mmp_block)); 66153b50d501STheodore Ts'o if (err) 6616c5e06d10SJohann Lombardi goto restore_opts; 6617c5e06d10SJohann Lombardi } 66183bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6619c79d967dSChristoph Hellwig enable_quota = 1; 66203bbef91bSAustin Kim #endif 6621ac27a0ecSDave Kleikamp } 6622ac27a0ecSDave Kleikamp } 6623bfff6873SLukas Czerner 6624bfff6873SLukas Czerner /* 66250f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 66260f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 66270f5bde1dSJan Kara * succeed. 66280f5bde1dSJan Kara */ 6629dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6630d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6631d176b1f6SJan Kara if (err) 6632d176b1f6SJan Kara goto restore_opts; 66330f5bde1dSJan Kara } 6634d176b1f6SJan Kara 6635c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 66364392fbc4SJan Kara err = ext4_commit_super(sb); 6637c89128a0SJaegeuk Kim if (err) 6638c89128a0SJaegeuk Kim goto restore_opts; 6639c89128a0SJaegeuk Kim } 66400390131bSFrank Mayhar 6641ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 66427c319d32SAditya Kali if (enable_quota) { 66437c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 66440f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6645e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 66467c319d32SAditya Kali err = ext4_enable_quotas(sb); 664707724f98STheodore Ts'o if (err) 66487c319d32SAditya Kali goto restore_opts; 66497c319d32SAditya Kali } 66507c319d32SAditya Kali } 66514c0b4818STheodore Ts'o /* Release old quota file names */ 66524c0b4818STheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 66534c0b4818STheodore Ts'o kfree(old_opts.s_qf_names[i]); 66547c319d32SAditya Kali #endif 6655dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66560f5bde1dSJan Kara ext4_release_system_zone(sb); 6657d4c402d9SCurt Wohlgemuth 6658eb1f822cSTheodore Ts'o /* 6659eb1f822cSTheodore Ts'o * Reinitialize lazy itable initialization thread based on 6660eb1f822cSTheodore Ts'o * current settings 6661eb1f822cSTheodore Ts'o */ 6662eb1f822cSTheodore Ts'o if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6663eb1f822cSTheodore Ts'o ext4_unregister_li_request(sb); 6664eb1f822cSTheodore Ts'o else { 6665eb1f822cSTheodore Ts'o ext4_group_t first_not_zeroed; 6666eb1f822cSTheodore Ts'o first_not_zeroed = ext4_has_uninit_itable(sb); 6667eb1f822cSTheodore Ts'o ext4_register_li_request(sb, first_not_zeroed); 6668eb1f822cSTheodore Ts'o } 6669eb1f822cSTheodore Ts'o 667061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 667161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 667261bb4a1cSTheodore Ts'o 6673ac27a0ecSDave Kleikamp return 0; 66740b8e58a1SAndreas Dilger 6675ac27a0ecSDave Kleikamp restore_opts: 66764c0b4818STheodore Ts'o /* 66774c0b4818STheodore Ts'o * If there was a failing r/w to ro transition, we may need to 66784c0b4818STheodore Ts'o * re-enable quota 66794c0b4818STheodore Ts'o */ 6680d5d020b3SJan Kara if (sb_rdonly(sb) && !(old_sb_flags & SB_RDONLY) && 66814c0b4818STheodore Ts'o sb_any_quota_suspended(sb)) 66824c0b4818STheodore Ts'o dquot_resume(sb, -1); 6683745f17a4SBaokun Li 6684745f17a4SBaokun Li alloc_ctx = ext4_writepages_down_write(sb); 6685ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6686ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6687a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6688ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6689ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6690ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 669130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 669230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6693745f17a4SBaokun Li ext4_writepages_up_write(sb, alloc_ctx); 6694745f17a4SBaokun Li 6695dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 66960f5bde1dSJan Kara ext4_release_system_zone(sb); 6697ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6698ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6699a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 670033458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 670133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6702ac27a0ecSDave Kleikamp } 670333458eabSTheodore Ts'o synchronize_rcu(); 670433458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 670533458eabSTheodore Ts'o kfree(to_free[i]); 6706ac27a0ecSDave Kleikamp #endif 670761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 670861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6709ac27a0ecSDave Kleikamp return err; 6710ac27a0ecSDave Kleikamp } 6711ac27a0ecSDave Kleikamp 6712cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 67137edfd85bSLukas Czerner { 6714cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 67157edfd85bSLukas Czerner int ret; 67167edfd85bSLukas Czerner 6717cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 67187edfd85bSLukas Czerner 6719cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 67207edfd85bSLukas Czerner if (ret < 0) 67217edfd85bSLukas Czerner return ret; 6722cebe85d5SLukas Czerner 6723960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6724cebe85d5SLukas Czerner if (ret < 0) 6725cebe85d5SLukas Czerner return ret; 6726cebe85d5SLukas Czerner 67276dcc98fbSTheodore Ts'o ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.", 67286dcc98fbSTheodore Ts'o &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w", 67296dcc98fbSTheodore Ts'o ext4_quota_mode(sb)); 6730cebe85d5SLukas Czerner 6731cebe85d5SLukas Czerner return 0; 67327edfd85bSLukas Czerner } 67337edfd85bSLukas Czerner 6734689c958cSLi Xi #ifdef CONFIG_QUOTA 6735689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6736689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6737689c958cSLi Xi { 6738689c958cSLi Xi struct kqid qid; 6739689c958cSLi Xi struct dquot *dquot; 6740689c958cSLi Xi u64 limit; 6741689c958cSLi Xi u64 curblock; 6742689c958cSLi Xi 6743689c958cSLi Xi qid = make_kqid_projid(projid); 6744689c958cSLi Xi dquot = dqget(sb, qid); 6745689c958cSLi Xi if (IS_ERR(dquot)) 6746689c958cSLi Xi return PTR_ERR(dquot); 67477b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6748689c958cSLi Xi 6749a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6750a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 675157c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 675257c32ea4SChengguang Xu 6753689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6754f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6755f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6756689c958cSLi Xi buf->f_blocks = limit; 6757689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6758689c958cSLi Xi (buf->f_blocks > curblock) ? 6759689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6760689c958cSLi Xi } 6761689c958cSLi Xi 6762a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6763a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6764689c958cSLi Xi if (limit && buf->f_files > limit) { 6765689c958cSLi Xi buf->f_files = limit; 6766689c958cSLi Xi buf->f_ffree = 6767689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6768689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6769689c958cSLi Xi } 6770689c958cSLi Xi 67717b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6772689c958cSLi Xi dqput(dquot); 6773689c958cSLi Xi return 0; 6774689c958cSLi Xi } 6775689c958cSLi Xi #endif 6776689c958cSLi Xi 6777617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6778ac27a0ecSDave Kleikamp { 6779ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6780617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6781617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 678227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6783d02a9391SKazuya Mio s64 bfree; 678427dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6785ac27a0ecSDave Kleikamp 6786952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6787952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6788ac27a0ecSDave Kleikamp 6789617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6790ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6791b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 679257042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 679357042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6794d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 679557042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 679627dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 679727dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 679827dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6799ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6800ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 680152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6802617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 68039591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 68040b8e58a1SAndreas Dilger 6805689c958cSLi Xi #ifdef CONFIG_QUOTA 6806689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6807689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6808689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6809689c958cSLi Xi #endif 6810ac27a0ecSDave Kleikamp return 0; 6811ac27a0ecSDave Kleikamp } 6812ac27a0ecSDave Kleikamp 6813ac27a0ecSDave Kleikamp 6814ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6815ac27a0ecSDave Kleikamp 6816bc8230eeSJan Kara /* 6817bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6818bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6819bc8230eeSJan Kara */ 6820ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6821ac27a0ecSDave Kleikamp { 68224c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6823ac27a0ecSDave Kleikamp } 6824ac27a0ecSDave Kleikamp 6825617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6826ac27a0ecSDave Kleikamp { 6827ac27a0ecSDave Kleikamp int ret, err; 6828ac27a0ecSDave Kleikamp handle_t *handle; 6829ac27a0ecSDave Kleikamp struct inode *inode; 6830ac27a0ecSDave Kleikamp 6831ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 68329924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6833617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6834ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6835ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6836ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6837d8b945faSYe Bin if (ret < 0) 6838d8b945faSYe Bin ext4_error_err(dquot->dq_sb, -ret, 6839d8b945faSYe Bin "Failed to commit dquot type %d", 6840d8b945faSYe Bin dquot->dq_id.type); 6841617ba13bSMingming Cao err = ext4_journal_stop(handle); 6842ac27a0ecSDave Kleikamp if (!ret) 6843ac27a0ecSDave Kleikamp ret = err; 6844ac27a0ecSDave Kleikamp return ret; 6845ac27a0ecSDave Kleikamp } 6846ac27a0ecSDave Kleikamp 6847617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6848ac27a0ecSDave Kleikamp { 6849ac27a0ecSDave Kleikamp int ret, err; 6850ac27a0ecSDave Kleikamp handle_t *handle; 6851ac27a0ecSDave Kleikamp 68529924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6853617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6854ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6855ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6856ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6857d8b945faSYe Bin if (ret < 0) 6858d8b945faSYe Bin ext4_error_err(dquot->dq_sb, -ret, 6859d8b945faSYe Bin "Failed to acquire dquot type %d", 6860d8b945faSYe Bin dquot->dq_id.type); 6861617ba13bSMingming Cao err = ext4_journal_stop(handle); 6862ac27a0ecSDave Kleikamp if (!ret) 6863ac27a0ecSDave Kleikamp ret = err; 6864ac27a0ecSDave Kleikamp return ret; 6865ac27a0ecSDave Kleikamp } 6866ac27a0ecSDave Kleikamp 6867617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6868ac27a0ecSDave Kleikamp { 6869ac27a0ecSDave Kleikamp int ret, err; 6870ac27a0ecSDave Kleikamp handle_t *handle; 6871ac27a0ecSDave Kleikamp 68729924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6873617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 68749c3013e9SJan Kara if (IS_ERR(handle)) { 68759c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 68769c3013e9SJan Kara dquot_release(dquot); 6877ac27a0ecSDave Kleikamp return PTR_ERR(handle); 68789c3013e9SJan Kara } 6879ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6880d8b945faSYe Bin if (ret < 0) 6881d8b945faSYe Bin ext4_error_err(dquot->dq_sb, -ret, 6882d8b945faSYe Bin "Failed to release dquot type %d", 6883d8b945faSYe Bin dquot->dq_id.type); 6884617ba13bSMingming Cao err = ext4_journal_stop(handle); 6885ac27a0ecSDave Kleikamp if (!ret) 6886ac27a0ecSDave Kleikamp ret = err; 6887ac27a0ecSDave Kleikamp return ret; 6888ac27a0ecSDave Kleikamp } 6889ac27a0ecSDave Kleikamp 6890617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6891ac27a0ecSDave Kleikamp { 6892262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6893262b4662SJan Kara 6894f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6895ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6896617ba13bSMingming Cao return ext4_write_dquot(dquot); 6897ac27a0ecSDave Kleikamp } else { 6898ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6899ac27a0ecSDave Kleikamp } 6900ac27a0ecSDave Kleikamp } 6901ac27a0ecSDave Kleikamp 6902617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6903ac27a0ecSDave Kleikamp { 6904ac27a0ecSDave Kleikamp int ret, err; 6905ac27a0ecSDave Kleikamp handle_t *handle; 6906ac27a0ecSDave Kleikamp 6907ac27a0ecSDave Kleikamp /* Data block + inode block */ 6908f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6909ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6910ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6911ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6912617ba13bSMingming Cao err = ext4_journal_stop(handle); 6913ac27a0ecSDave Kleikamp if (!ret) 6914ac27a0ecSDave Kleikamp ret = err; 6915ac27a0ecSDave Kleikamp return ret; 6916ac27a0ecSDave Kleikamp } 6917ac27a0ecSDave Kleikamp 6918daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6919daf647d2STheodore Ts'o { 6920daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6921daf647d2STheodore Ts'o 6922daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6923daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6924daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6925daf647d2STheodore Ts'o * because the name of the lock is set using the 6926daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6927daf647d2STheodore Ts'o */ 6928daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6929daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6930daf647d2STheodore Ts'o } 6931daf647d2STheodore Ts'o 6932ac27a0ecSDave Kleikamp /* 6933ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6934ac27a0ecSDave Kleikamp */ 6935617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 69368c54ca9cSAl Viro const struct path *path) 6937ac27a0ecSDave Kleikamp { 6938ac27a0ecSDave Kleikamp int err; 6939ac27a0ecSDave Kleikamp 6940ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6941ac27a0ecSDave Kleikamp return -EINVAL; 69420623543bSJan Kara 6943ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6944d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6945ac27a0ecSDave Kleikamp return -EXDEV; 6946e0770e91SJan Kara 6947e0770e91SJan Kara /* Quota already enabled for this file? */ 6948e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6949e0770e91SJan Kara return -EBUSY; 6950e0770e91SJan Kara 69510623543bSJan Kara /* Journaling quota? */ 69520623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 69532b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6954f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6955b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6956b31e1552SEric Sandeen "Quota file not on filesystem root. " 6957b31e1552SEric Sandeen "Journaled quota will not work"); 695891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 695991389240SJan Kara } else { 696091389240SJan Kara /* 696191389240SJan Kara * Clear the flag just in case mount options changed since 696291389240SJan Kara * last time. 696391389240SJan Kara */ 696491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 69650623543bSJan Kara } 69660623543bSJan Kara 6967daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6968daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 696915fc69bbSJan Kara if (!err) { 6970957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6971957153fcSJan Kara handle_t *handle; 6972957153fcSJan Kara 697361a92987SJan Kara /* 697461a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 697561a92987SJan Kara * files. If this fails, we return success anyway since quotas 697661a92987SJan Kara * are already enabled and this is not a hard failure. 697761a92987SJan Kara */ 6978957153fcSJan Kara inode_lock(inode); 6979957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6980957153fcSJan Kara if (IS_ERR(handle)) 6981957153fcSJan Kara goto unlock_inode; 6982957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6983957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6984957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 69854209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6986957153fcSJan Kara ext4_journal_stop(handle); 6987957153fcSJan Kara unlock_inode: 6988957153fcSJan Kara inode_unlock(inode); 698915fc69bbSJan Kara if (err) 699015fc69bbSJan Kara dquot_quota_off(sb, type); 6991957153fcSJan Kara } 699215fc69bbSJan Kara if (err) 699315fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 699415fc69bbSJan Kara I_DATA_SEM_NORMAL); 6995daf647d2STheodore Ts'o return err; 6996ac27a0ecSDave Kleikamp } 6997ac27a0ecSDave Kleikamp 699807342ec2SBaokun Li static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum) 699907342ec2SBaokun Li { 700007342ec2SBaokun Li switch (type) { 700107342ec2SBaokun Li case USRQUOTA: 700207342ec2SBaokun Li return qf_inum == EXT4_USR_QUOTA_INO; 700307342ec2SBaokun Li case GRPQUOTA: 700407342ec2SBaokun Li return qf_inum == EXT4_GRP_QUOTA_INO; 700507342ec2SBaokun Li case PRJQUOTA: 700607342ec2SBaokun Li return qf_inum >= EXT4_GOOD_OLD_FIRST_INO; 700707342ec2SBaokun Li default: 700807342ec2SBaokun Li BUG(); 700907342ec2SBaokun Li } 701007342ec2SBaokun Li } 701107342ec2SBaokun Li 70127c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 70137c319d32SAditya Kali unsigned int flags) 70147c319d32SAditya Kali { 70157c319d32SAditya Kali int err; 70167c319d32SAditya Kali struct inode *qf_inode; 7017a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 70187c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 7019689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 7020689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 70217c319d32SAditya Kali }; 70227c319d32SAditya Kali 7023e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 70247c319d32SAditya Kali 70257c319d32SAditya Kali if (!qf_inums[type]) 70267c319d32SAditya Kali return -EPERM; 70277c319d32SAditya Kali 702807342ec2SBaokun Li if (!ext4_check_quota_inum(type, qf_inums[type])) { 702907342ec2SBaokun Li ext4_error(sb, "Bad quota inum: %lu, type: %d", 703007342ec2SBaokun Li qf_inums[type], type); 703107342ec2SBaokun Li return -EUCLEAN; 703207342ec2SBaokun Li } 703307342ec2SBaokun Li 70348a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 70357c319d32SAditya Kali if (IS_ERR(qf_inode)) { 703607342ec2SBaokun Li ext4_error(sb, "Bad quota inode: %lu, type: %d", 703707342ec2SBaokun Li qf_inums[type], type); 70387c319d32SAditya Kali return PTR_ERR(qf_inode); 70397c319d32SAditya Kali } 70407c319d32SAditya Kali 7041bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 7042bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 7043daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 70447212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 7045daf647d2STheodore Ts'o if (err) 7046daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 704761157b24SPan Bian iput(qf_inode); 70487c319d32SAditya Kali 70497c319d32SAditya Kali return err; 70507c319d32SAditya Kali } 70517c319d32SAditya Kali 70527c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 705325c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 70547c319d32SAditya Kali { 70557c319d32SAditya Kali int type, err = 0; 7056a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 70577c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 7058689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 7059689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 70607c319d32SAditya Kali }; 706149da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 706249da9392SJan Kara test_opt(sb, USRQUOTA), 706349da9392SJan Kara test_opt(sb, GRPQUOTA), 706449da9392SJan Kara test_opt(sb, PRJQUOTA), 706549da9392SJan Kara }; 70667c319d32SAditya Kali 706791389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 7068a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 70697c319d32SAditya Kali if (qf_inums[type]) { 70707c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 707149da9392SJan Kara DQUOT_USAGE_ENABLED | 707249da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 70737c319d32SAditya Kali if (err) { 70747c319d32SAditya Kali ext4_warning(sb, 707572ba7450STheodore Ts'o "Failed to enable quota tracking " 707607342ec2SBaokun Li "(type=%d, err=%d, ino=%lu). " 707707342ec2SBaokun Li "Please run e2fsck to fix.", type, 707807342ec2SBaokun Li err, qf_inums[type]); 70794013d47aSJan Kara 7080f3c1c42eSBaokun Li ext4_quotas_off(sb, type); 70817c319d32SAditya Kali return err; 70827c319d32SAditya Kali } 70837c319d32SAditya Kali } 70847c319d32SAditya Kali } 70857c319d32SAditya Kali return 0; 70867c319d32SAditya Kali } 70877c319d32SAditya Kali 7088ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 7089ca0e05e4SDmitry Monakhov { 709021f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 709121f97697SJan Kara handle_t *handle; 7092957153fcSJan Kara int err; 709321f97697SJan Kara 709487009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 709587009d86SDmitry Monakhov * Caller already holds s_umount sem */ 709687009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 7097ca0e05e4SDmitry Monakhov sync_filesystem(sb); 7098ca0e05e4SDmitry Monakhov 7099957153fcSJan Kara if (!inode || !igrab(inode)) 71000b268590SAmir Goldstein goto out; 71010b268590SAmir Goldstein 7102957153fcSJan Kara err = dquot_quota_off(sb, type); 7103964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 7104957153fcSJan Kara goto out_put; 7105e0e985f3SJan Kara /* 7106e0e985f3SJan Kara * When the filesystem was remounted read-only first, we cannot cleanup 7107e0e985f3SJan Kara * inode flags here. Bad luck but people should be using QUOTA feature 7108e0e985f3SJan Kara * these days anyway. 7109e0e985f3SJan Kara */ 7110e0e985f3SJan Kara if (sb_rdonly(sb)) 7111e0e985f3SJan Kara goto out_put; 7112957153fcSJan Kara 7113957153fcSJan Kara inode_lock(inode); 711461a92987SJan Kara /* 711561a92987SJan Kara * Update modification times of quota files when userspace can 711661a92987SJan Kara * start looking at them. If we fail, we return success anyway since 711761a92987SJan Kara * this is not a hard failure and quotas are already disabled. 711861a92987SJan Kara */ 71199924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 71204209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 71214209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 7122957153fcSJan Kara goto out_unlock; 71234209ae12SHarshad Shirwadkar } 7124957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 7125957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 7126b898ab23SJeff Layton inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 71274209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 712821f97697SJan Kara ext4_journal_stop(handle); 7129957153fcSJan Kara out_unlock: 7130957153fcSJan Kara inode_unlock(inode); 7131957153fcSJan Kara out_put: 7132964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 7133957153fcSJan Kara iput(inode); 7134957153fcSJan Kara return err; 713521f97697SJan Kara out: 7136ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 7137ca0e05e4SDmitry Monakhov } 7138ca0e05e4SDmitry Monakhov 7139ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 7140ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 7141ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 7142ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 7143617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 7144ac27a0ecSDave Kleikamp size_t len, loff_t off) 7145ac27a0ecSDave Kleikamp { 7146ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7147725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 7148ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 7149ac27a0ecSDave Kleikamp int tocopy; 7150ac27a0ecSDave Kleikamp size_t toread; 7151ac27a0ecSDave Kleikamp struct buffer_head *bh; 7152ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 7153ac27a0ecSDave Kleikamp 7154ac27a0ecSDave Kleikamp if (off > i_size) 7155ac27a0ecSDave Kleikamp return 0; 7156ac27a0ecSDave Kleikamp if (off+len > i_size) 7157ac27a0ecSDave Kleikamp len = i_size-off; 7158ac27a0ecSDave Kleikamp toread = len; 7159ac27a0ecSDave Kleikamp while (toread > 0) { 716066267814SJiangshan Yi tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); 71611c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 71621c215028STheodore Ts'o if (IS_ERR(bh)) 71631c215028STheodore Ts'o return PTR_ERR(bh); 7164ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 7165ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 7166ac27a0ecSDave Kleikamp else 7167ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 7168ac27a0ecSDave Kleikamp brelse(bh); 7169ac27a0ecSDave Kleikamp offset = 0; 7170ac27a0ecSDave Kleikamp toread -= tocopy; 7171ac27a0ecSDave Kleikamp data += tocopy; 7172ac27a0ecSDave Kleikamp blk++; 7173ac27a0ecSDave Kleikamp } 7174ac27a0ecSDave Kleikamp return len; 7175ac27a0ecSDave Kleikamp } 7176ac27a0ecSDave Kleikamp 7177ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7178ac27a0ecSDave Kleikamp * enough credits) */ 7179617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7180ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7181ac27a0ecSDave Kleikamp { 7182ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7183725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 71844209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7185c5e298aeSTheodore Ts'o int retries = 0; 7186ac27a0ecSDave Kleikamp struct buffer_head *bh; 7187ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7188ac27a0ecSDave Kleikamp 7189380a0091SYe Bin if (!handle) { 7190b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7191b31e1552SEric Sandeen " cancelled because transaction is not started", 71929c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 71939c3013e9SJan Kara return -EIO; 71949c3013e9SJan Kara } 719567eeb568SDmitry Monakhov /* 719667eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 719767eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 719867eeb568SDmitry Monakhov */ 719967eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 720067eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 720167eeb568SDmitry Monakhov " cancelled because not block aligned", 720267eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 720367eeb568SDmitry Monakhov return -EIO; 720467eeb568SDmitry Monakhov } 720567eeb568SDmitry Monakhov 7206c5e298aeSTheodore Ts'o do { 7207c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7208c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7209c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 721045586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7211c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 72121c215028STheodore Ts'o if (IS_ERR(bh)) 72131c215028STheodore Ts'o return PTR_ERR(bh); 7214ac27a0ecSDave Kleikamp if (!bh) 7215ac27a0ecSDave Kleikamp goto out; 72165d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7217188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7218ac27a0ecSDave Kleikamp if (err) { 7219ac27a0ecSDave Kleikamp brelse(bh); 72201c215028STheodore Ts'o return err; 7221ac27a0ecSDave Kleikamp } 7222ac27a0ecSDave Kleikamp lock_buffer(bh); 722367eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7224ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7225ac27a0ecSDave Kleikamp unlock_buffer(bh); 72260390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7227ac27a0ecSDave Kleikamp brelse(bh); 7228ac27a0ecSDave Kleikamp out: 722967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 723067eeb568SDmitry Monakhov i_size_write(inode, off + len); 7231617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 72324209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 72334209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 72344209ae12SHarshad Shirwadkar err = err2; 723521f97697SJan Kara } 72364209ae12SHarshad Shirwadkar return err ? err : len; 7237ac27a0ecSDave Kleikamp } 7238ac27a0ecSDave Kleikamp #endif 7239ac27a0ecSDave Kleikamp 7240c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 724124b58424STheodore Ts'o static inline void register_as_ext2(void) 724224b58424STheodore Ts'o { 724324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 724424b58424STheodore Ts'o if (err) 724524b58424STheodore Ts'o printk(KERN_WARNING 724624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 724724b58424STheodore Ts'o } 724824b58424STheodore Ts'o 724924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 725024b58424STheodore Ts'o { 725124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 725224b58424STheodore Ts'o } 72532035e776STheodore Ts'o 72542035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 72552035e776STheodore Ts'o { 7256e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 72572035e776STheodore Ts'o return 0; 7258bc98a42cSDavid Howells if (sb_rdonly(sb)) 72592035e776STheodore Ts'o return 1; 7260e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 72612035e776STheodore Ts'o return 0; 72622035e776STheodore Ts'o return 1; 72632035e776STheodore Ts'o } 726424b58424STheodore Ts'o #else 726524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 726624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 72672035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 726824b58424STheodore Ts'o #endif 726924b58424STheodore Ts'o 727024b58424STheodore Ts'o static inline void register_as_ext3(void) 727124b58424STheodore Ts'o { 727224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 727324b58424STheodore Ts'o if (err) 727424b58424STheodore Ts'o printk(KERN_WARNING 727524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 727624b58424STheodore Ts'o } 727724b58424STheodore Ts'o 727824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 727924b58424STheodore Ts'o { 728024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 728124b58424STheodore Ts'o } 72822035e776STheodore Ts'o 72832035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 72842035e776STheodore Ts'o { 7285e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 72862035e776STheodore Ts'o return 0; 7287e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 72882035e776STheodore Ts'o return 0; 7289bc98a42cSDavid Howells if (sb_rdonly(sb)) 72902035e776STheodore Ts'o return 1; 7291e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 72922035e776STheodore Ts'o return 0; 72932035e776STheodore Ts'o return 1; 72942035e776STheodore Ts'o } 729524b58424STheodore Ts'o 72961489dffdSChristoph Hellwig static void ext4_kill_sb(struct super_block *sb) 72971489dffdSChristoph Hellwig { 72981489dffdSChristoph Hellwig struct ext4_sb_info *sbi = EXT4_SB(sb); 729961ead714SChristian Brauner struct file *bdev_file = sbi ? sbi->s_journal_bdev_file : NULL; 73001489dffdSChristoph Hellwig 73011489dffdSChristoph Hellwig kill_block_super(sb); 73021489dffdSChristoph Hellwig 730361ead714SChristian Brauner if (bdev_file) 730422650a99SChristian Brauner bdev_fput(bdev_file); 73051489dffdSChristoph Hellwig } 73061489dffdSChristoph Hellwig 730703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7308ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 730903010a33STheodore Ts'o .name = "ext4", 7310cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7311cebe85d5SLukas Czerner .parameters = ext4_param_specs, 73121489dffdSChristoph Hellwig .kill_sb = ext4_kill_sb, 731350ec1d72SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7314ac27a0ecSDave Kleikamp }; 73157f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7316ac27a0ecSDave Kleikamp 7317e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7318e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7319e9e3bcecSEric Sandeen 73205dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7321ac27a0ecSDave Kleikamp { 7322e9e3bcecSEric Sandeen int i, err; 7323c9de560dSAlex Tomas 7324e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 732507c0c5d8SAl Viro ext4_li_info = NULL; 732607c0c5d8SAl Viro 73279a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 732812e9b892SDmitry Monakhov ext4_check_flag_values(); 7329e9e3bcecSEric Sandeen 7330e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7331e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7332e9e3bcecSEric Sandeen 733351865fdaSZheng Liu err = ext4_init_es(); 73346fd058f7STheodore Ts'o if (err) 73356fd058f7STheodore Ts'o return err; 733651865fdaSZheng Liu 73371dc0aa46SEric Whitney err = ext4_init_pending(); 73381dc0aa46SEric Whitney if (err) 733922cfe4b4SEric Biggers goto out7; 734022cfe4b4SEric Biggers 734122cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 734222cfe4b4SEric Biggers if (err) 73431dc0aa46SEric Whitney goto out6; 73441dc0aa46SEric Whitney 734551865fdaSZheng Liu err = ext4_init_pageio(); 734651865fdaSZheng Liu if (err) 7347b5799018STheodore Ts'o goto out5; 734851865fdaSZheng Liu 73495dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7350bd2d0210STheodore Ts'o if (err) 7351b5799018STheodore Ts'o goto out4; 7352857ac889SLukas Czerner 7353b5799018STheodore Ts'o err = ext4_init_sysfs(); 7354dd68314cSTheodore Ts'o if (err) 7355b5799018STheodore Ts'o goto out3; 7356857ac889SLukas Czerner 73575dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7358ac27a0ecSDave Kleikamp if (err) 7359c9de560dSAlex Tomas goto out2; 7360ac27a0ecSDave Kleikamp err = init_inodecache(); 7361ac27a0ecSDave Kleikamp if (err) 7362ac27a0ecSDave Kleikamp goto out1; 7363aa75f4d3SHarshad Shirwadkar 7364aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7365aa75f4d3SHarshad Shirwadkar if (err) 7366aa75f4d3SHarshad Shirwadkar goto out05; 7367aa75f4d3SHarshad Shirwadkar 736824b58424STheodore Ts'o register_as_ext3(); 73692035e776STheodore Ts'o register_as_ext2(); 737003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7371ac27a0ecSDave Kleikamp if (err) 7372ac27a0ecSDave Kleikamp goto out; 7373bfff6873SLukas Czerner 7374ac27a0ecSDave Kleikamp return 0; 7375ac27a0ecSDave Kleikamp out: 737624b58424STheodore Ts'o unregister_as_ext2(); 737724b58424STheodore Ts'o unregister_as_ext3(); 7378ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7379aa75f4d3SHarshad Shirwadkar out05: 7380ac27a0ecSDave Kleikamp destroy_inodecache(); 7381ac27a0ecSDave Kleikamp out1: 73825dabfc78STheodore Ts'o ext4_exit_mballoc(); 73839c191f70ST Makphaibulchoke out2: 7384b5799018STheodore Ts'o ext4_exit_sysfs(); 7385b5799018STheodore Ts'o out3: 7386dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7387b5799018STheodore Ts'o out4: 73885dabfc78STheodore Ts'o ext4_exit_pageio(); 7389b5799018STheodore Ts'o out5: 739022cfe4b4SEric Biggers ext4_exit_post_read_processing(); 73911dc0aa46SEric Whitney out6: 739222cfe4b4SEric Biggers ext4_exit_pending(); 739322cfe4b4SEric Biggers out7: 739451865fdaSZheng Liu ext4_exit_es(); 739551865fdaSZheng Liu 7396ac27a0ecSDave Kleikamp return err; 7397ac27a0ecSDave Kleikamp } 7398ac27a0ecSDave Kleikamp 73995dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7400ac27a0ecSDave Kleikamp { 7401bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 740224b58424STheodore Ts'o unregister_as_ext2(); 740324b58424STheodore Ts'o unregister_as_ext3(); 740403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7405ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7406ac27a0ecSDave Kleikamp destroy_inodecache(); 74075dabfc78STheodore Ts'o ext4_exit_mballoc(); 7408b5799018STheodore Ts'o ext4_exit_sysfs(); 74095dabfc78STheodore Ts'o ext4_exit_system_zone(); 74105dabfc78STheodore Ts'o ext4_exit_pageio(); 741122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7412dd12ed14SEric Sandeen ext4_exit_es(); 74131dc0aa46SEric Whitney ext4_exit_pending(); 7414ac27a0ecSDave Kleikamp } 7415ac27a0ecSDave Kleikamp 7416ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 741783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7418ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 74197ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 74205dabfc78STheodore Ts'o module_init(ext4_init_fs) 74215dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7422