1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/smp_lock.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> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 401330593eSVignesh Babu #include <linux/log2.h> 41717d50e4SAndreas Dilger #include <linux/crc16.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 443dcf5451SChristoph Hellwig #include "ext4.h" 453dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 46ac27a0ecSDave Kleikamp #include "xattr.h" 47ac27a0ecSDave Kleikamp #include "acl.h" 483661d286STheodore Ts'o #include "mballoc.h" 49ac27a0ecSDave Kleikamp 509bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 519bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 529bffad1eSTheodore Ts'o 539f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 543197ebdbSTheodore Ts'o static struct kset *ext4_kset; 559f6200bbSTheodore Ts'o 56617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 57ac27a0ecSDave Kleikamp unsigned long journal_devnum); 58e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 59617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 60617ba13bSMingming Cao struct ext4_super_block *es); 61617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 62617ba13bSMingming Cao struct ext4_super_block *es); 63617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 64617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 65ac27a0ecSDave Kleikamp char nbuf[16]); 66617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 67617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 68c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 70c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 71ba69f9abSJan Kara static int ext4_get_sb(struct file_system_type *fs_type, int flags, 72ba69f9abSJan Kara const char *dev_name, void *data, struct vfsmount *mnt); 73ac27a0ecSDave Kleikamp 74ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 75ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 76ba69f9abSJan Kara .owner = THIS_MODULE, 77ba69f9abSJan Kara .name = "ext3", 78ba69f9abSJan Kara .get_sb = ext4_get_sb, 79ba69f9abSJan Kara .kill_sb = kill_block_super, 80ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 81ba69f9abSJan Kara }; 82ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 83ba69f9abSJan Kara #else 84ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 85ba69f9abSJan Kara #endif 86bd81d8eeSLaurent Vivier 878fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 888fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 89bd81d8eeSLaurent Vivier { 903a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 918fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 928fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 93bd81d8eeSLaurent Vivier } 94bd81d8eeSLaurent Vivier 958fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 968fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 97bd81d8eeSLaurent Vivier { 985272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 998fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1008fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 101bd81d8eeSLaurent Vivier } 102bd81d8eeSLaurent Vivier 1038fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1048fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 105bd81d8eeSLaurent Vivier { 1065272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1078fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1088fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 109bd81d8eeSLaurent Vivier } 110bd81d8eeSLaurent Vivier 111560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 112560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 113560671a0SAneesh Kumar K.V { 114560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 115560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 116560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 117560671a0SAneesh Kumar K.V } 118560671a0SAneesh Kumar K.V 119560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 120560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 121560671a0SAneesh Kumar K.V { 122560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 123560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 124560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 125560671a0SAneesh Kumar K.V } 126560671a0SAneesh Kumar K.V 127560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 128560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 129560671a0SAneesh Kumar K.V { 130560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 131560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 132560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 133560671a0SAneesh Kumar K.V } 134560671a0SAneesh Kumar K.V 135560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 136560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 137560671a0SAneesh Kumar K.V { 138560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 139560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 140560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 141560671a0SAneesh Kumar K.V } 142560671a0SAneesh Kumar K.V 1438fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1448fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 145bd81d8eeSLaurent Vivier { 1463a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1478fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1488fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 149bd81d8eeSLaurent Vivier } 150bd81d8eeSLaurent Vivier 1518fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 153bd81d8eeSLaurent Vivier { 1545272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1558fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1568fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 1598fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1608fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 161bd81d8eeSLaurent Vivier { 1625272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1638fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1648fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 165bd81d8eeSLaurent Vivier } 166bd81d8eeSLaurent Vivier 167560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 168560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 169560671a0SAneesh Kumar K.V { 170560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 171560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 172560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 173560671a0SAneesh Kumar K.V } 174560671a0SAneesh Kumar K.V 175560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 179560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 180560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 187560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 188560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 193560671a0SAneesh Kumar K.V { 194560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 195560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 196560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 197560671a0SAneesh Kumar K.V } 198560671a0SAneesh Kumar K.V 199d3d1faf6SCurt Wohlgemuth 200d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 201d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 202d3d1faf6SCurt Wohlgemuth { 203d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 204d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 205d3d1faf6SCurt Wohlgemuth 206d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 207d3d1faf6SCurt Wohlgemuth 208d3d1faf6SCurt Wohlgemuth ref_cnt++; 209d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 210d3d1faf6SCurt Wohlgemuth 211d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 212d3d1faf6SCurt Wohlgemuth return handle; 213d3d1faf6SCurt Wohlgemuth } 214d3d1faf6SCurt Wohlgemuth 215d3d1faf6SCurt Wohlgemuth 216d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 217d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 218d3d1faf6SCurt Wohlgemuth { 219d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 220d3d1faf6SCurt Wohlgemuth 221d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 222d3d1faf6SCurt Wohlgemuth 223d3d1faf6SCurt Wohlgemuth ref_cnt--; 224d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 225d3d1faf6SCurt Wohlgemuth 226d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 227d3d1faf6SCurt Wohlgemuth } 228d3d1faf6SCurt Wohlgemuth 229ac27a0ecSDave Kleikamp /* 230dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 231ac27a0ecSDave Kleikamp * 232ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 233ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 234ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 235ac27a0ecSDave Kleikamp * appropriate. 236ac27a0ecSDave Kleikamp */ 237617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 238ac27a0ecSDave Kleikamp { 239ac27a0ecSDave Kleikamp journal_t *journal; 240ac27a0ecSDave Kleikamp 241ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 242ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 243ac27a0ecSDave Kleikamp 244437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 245ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 246ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 247ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 248617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2490390131bSFrank Mayhar if (journal) { 250ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 251c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 252ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 253ac27a0ecSDave Kleikamp } 254dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 255ac27a0ecSDave Kleikamp } 256d3d1faf6SCurt Wohlgemuth return ext4_get_nojournal(); 2570390131bSFrank Mayhar } 258ac27a0ecSDave Kleikamp 259ac27a0ecSDave Kleikamp /* 260ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 261dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 262ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 263ac27a0ecSDave Kleikamp * appropriate. 264ac27a0ecSDave Kleikamp */ 265c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 266ac27a0ecSDave Kleikamp { 267ac27a0ecSDave Kleikamp struct super_block *sb; 268ac27a0ecSDave Kleikamp int err; 269ac27a0ecSDave Kleikamp int rc; 270ac27a0ecSDave Kleikamp 2710390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 272d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 2730390131bSFrank Mayhar return 0; 2740390131bSFrank Mayhar } 275ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 276ac27a0ecSDave Kleikamp err = handle->h_err; 277dab291afSMingming Cao rc = jbd2_journal_stop(handle); 278ac27a0ecSDave Kleikamp 279ac27a0ecSDave Kleikamp if (!err) 280ac27a0ecSDave Kleikamp err = rc; 281ac27a0ecSDave Kleikamp if (err) 282c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 283ac27a0ecSDave Kleikamp return err; 284ac27a0ecSDave Kleikamp } 285ac27a0ecSDave Kleikamp 28690c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 28790c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 28890c7201bSTheodore Ts'o handle_t *handle, int err) 289ac27a0ecSDave Kleikamp { 290ac27a0ecSDave Kleikamp char nbuf[16]; 291617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 292ac27a0ecSDave Kleikamp 2930390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2940390131bSFrank Mayhar 295ac27a0ecSDave Kleikamp if (bh) 296ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp if (!handle->h_err) 299ac27a0ecSDave Kleikamp handle->h_err = err; 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 302ac27a0ecSDave Kleikamp return; 303ac27a0ecSDave Kleikamp 30490c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 30590c7201bSTheodore Ts'o caller, line, errstr, err_fn); 306ac27a0ecSDave Kleikamp 307dab291afSMingming Cao jbd2_journal_abort_handle(handle); 308ac27a0ecSDave Kleikamp } 309ac27a0ecSDave Kleikamp 3101c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3111c13d5c0STheodore Ts'o unsigned int line) 3121c13d5c0STheodore Ts'o { 3131c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3141c13d5c0STheodore Ts'o 3151c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3161c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3171c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3181c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3191c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3201c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3211c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3221c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3231c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3241c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3251c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3261c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3271c13d5c0STheodore Ts'o } 32866e61a9eSTheodore Ts'o /* 32966e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33066e61a9eSTheodore Ts'o * started already 33166e61a9eSTheodore Ts'o */ 33266e61a9eSTheodore Ts'o if (!es->s_error_count) 33366e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3341c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3351c13d5c0STheodore Ts'o } 3361c13d5c0STheodore Ts'o 3371c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3381c13d5c0STheodore Ts'o unsigned int line) 3391c13d5c0STheodore Ts'o { 3401c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3411c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3421c13d5c0STheodore Ts'o } 3431c13d5c0STheodore Ts'o 3441c13d5c0STheodore Ts'o 345ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 346ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 347ac27a0ecSDave Kleikamp * 348ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 349617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 350ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 351ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 352ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 353ac27a0ecSDave Kleikamp * write out the superblock safely. 354ac27a0ecSDave Kleikamp * 355dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 356d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 357ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 358ac27a0ecSDave Kleikamp */ 359ac27a0ecSDave Kleikamp 360617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 361ac27a0ecSDave Kleikamp { 362ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 363ac27a0ecSDave Kleikamp return; 364ac27a0ecSDave Kleikamp 365ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 366617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 367ac27a0ecSDave Kleikamp 3684ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 369ac27a0ecSDave Kleikamp if (journal) 370dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 371ac27a0ecSDave Kleikamp } 372ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 373b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 374ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 375ac27a0ecSDave Kleikamp } 376ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 377617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 378ac27a0ecSDave Kleikamp sb->s_id); 379ac27a0ecSDave Kleikamp } 380ac27a0ecSDave Kleikamp 38112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 382c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 383ac27a0ecSDave Kleikamp { 384ac27a0ecSDave Kleikamp va_list args; 385ac27a0ecSDave Kleikamp 386ac27a0ecSDave Kleikamp va_start(args, fmt); 387c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", 388c398eda0STheodore Ts'o sb->s_id, function, line, current->comm); 389ac27a0ecSDave Kleikamp vprintk(fmt, args); 390ac27a0ecSDave Kleikamp printk("\n"); 391ac27a0ecSDave Kleikamp va_end(args); 392ac27a0ecSDave Kleikamp 393617ba13bSMingming Cao ext4_handle_error(sb); 394ac27a0ecSDave Kleikamp } 395ac27a0ecSDave Kleikamp 396c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 397c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 398273df556SFrank Mayhar const char *fmt, ...) 399273df556SFrank Mayhar { 400273df556SFrank Mayhar va_list args; 4011c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 402273df556SFrank Mayhar 4031c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4041c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4051c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 406273df556SFrank Mayhar va_start(args, fmt); 407c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 408c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 409c398eda0STheodore Ts'o if (block) 410c398eda0STheodore Ts'o printk("block %llu: ", block); 411c398eda0STheodore Ts'o printk("comm %s: ", current->comm); 412273df556SFrank Mayhar vprintk(fmt, args); 413273df556SFrank Mayhar printk("\n"); 414273df556SFrank Mayhar va_end(args); 415273df556SFrank Mayhar 416273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 417273df556SFrank Mayhar } 418273df556SFrank Mayhar 419c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 420c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 421273df556SFrank Mayhar { 422273df556SFrank Mayhar va_list args; 4231c13d5c0STheodore Ts'o struct ext4_super_block *es; 424273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 425273df556SFrank Mayhar char pathname[80], *path; 426273df556SFrank Mayhar 4271c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4281c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4291c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 430273df556SFrank Mayhar va_start(args, fmt); 431273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 432273df556SFrank Mayhar if (!path) 433273df556SFrank Mayhar path = "(unknown)"; 434273df556SFrank Mayhar printk(KERN_CRIT 435c398eda0STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu " 436c398eda0STheodore Ts'o "(comm %s path %s): ", 437c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino, 438c398eda0STheodore Ts'o current->comm, path); 439273df556SFrank Mayhar vprintk(fmt, args); 440273df556SFrank Mayhar printk("\n"); 441273df556SFrank Mayhar va_end(args); 442273df556SFrank Mayhar 443273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 444273df556SFrank Mayhar } 445273df556SFrank Mayhar 446617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 447ac27a0ecSDave Kleikamp char nbuf[16]) 448ac27a0ecSDave Kleikamp { 449ac27a0ecSDave Kleikamp char *errstr = NULL; 450ac27a0ecSDave Kleikamp 451ac27a0ecSDave Kleikamp switch (errno) { 452ac27a0ecSDave Kleikamp case -EIO: 453ac27a0ecSDave Kleikamp errstr = "IO failure"; 454ac27a0ecSDave Kleikamp break; 455ac27a0ecSDave Kleikamp case -ENOMEM: 456ac27a0ecSDave Kleikamp errstr = "Out of memory"; 457ac27a0ecSDave Kleikamp break; 458ac27a0ecSDave Kleikamp case -EROFS: 45978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 46078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 461ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 462ac27a0ecSDave Kleikamp else 463ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 464ac27a0ecSDave Kleikamp break; 465ac27a0ecSDave Kleikamp default: 466ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 467ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 468ac27a0ecSDave Kleikamp * NULL. */ 469ac27a0ecSDave Kleikamp if (nbuf) { 470ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 471ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 472ac27a0ecSDave Kleikamp errstr = nbuf; 473ac27a0ecSDave Kleikamp } 474ac27a0ecSDave Kleikamp break; 475ac27a0ecSDave Kleikamp } 476ac27a0ecSDave Kleikamp 477ac27a0ecSDave Kleikamp return errstr; 478ac27a0ecSDave Kleikamp } 479ac27a0ecSDave Kleikamp 480617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 481ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 482ac27a0ecSDave Kleikamp 483c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 484c398eda0STheodore Ts'o unsigned int line, int errno) 485ac27a0ecSDave Kleikamp { 486ac27a0ecSDave Kleikamp char nbuf[16]; 487ac27a0ecSDave Kleikamp const char *errstr; 488ac27a0ecSDave Kleikamp 489ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 490ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 491ac27a0ecSDave Kleikamp * an error. */ 492ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 493ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 494ac27a0ecSDave Kleikamp return; 495ac27a0ecSDave Kleikamp 496617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 497c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 498c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 4991c13d5c0STheodore Ts'o save_error_info(sb, function, line); 500ac27a0ecSDave Kleikamp 501617ba13bSMingming Cao ext4_handle_error(sb); 502ac27a0ecSDave Kleikamp } 503ac27a0ecSDave Kleikamp 504ac27a0ecSDave Kleikamp /* 505617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 506ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 507ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 508ac27a0ecSDave Kleikamp * 509ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 510ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 511ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 512ac27a0ecSDave Kleikamp */ 513ac27a0ecSDave Kleikamp 514c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 515c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 516ac27a0ecSDave Kleikamp { 517ac27a0ecSDave Kleikamp va_list args; 518ac27a0ecSDave Kleikamp 5191c13d5c0STheodore Ts'o save_error_info(sb, function, line); 520ac27a0ecSDave Kleikamp va_start(args, fmt); 521c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 522c398eda0STheodore Ts'o function, line); 523ac27a0ecSDave Kleikamp vprintk(fmt, args); 524ac27a0ecSDave Kleikamp printk("\n"); 525ac27a0ecSDave Kleikamp va_end(args); 526ac27a0ecSDave Kleikamp 5271c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 528b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 529ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5304ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 531ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 532dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5331c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5341c13d5c0STheodore Ts'o } 5351c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5361c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 537ac27a0ecSDave Kleikamp } 538ac27a0ecSDave Kleikamp 539b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 540b31e1552SEric Sandeen const char *fmt, ...) 541b31e1552SEric Sandeen { 542b31e1552SEric Sandeen va_list args; 543b31e1552SEric Sandeen 544b31e1552SEric Sandeen va_start(args, fmt); 545b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 546b31e1552SEric Sandeen vprintk(fmt, args); 547b31e1552SEric Sandeen printk("\n"); 548b31e1552SEric Sandeen va_end(args); 549b31e1552SEric Sandeen } 550b31e1552SEric Sandeen 55112062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 552c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 553ac27a0ecSDave Kleikamp { 554ac27a0ecSDave Kleikamp va_list args; 555ac27a0ecSDave Kleikamp 556ac27a0ecSDave Kleikamp va_start(args, fmt); 557c398eda0STheodore Ts'o printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", 558c398eda0STheodore Ts'o sb->s_id, function, line); 559ac27a0ecSDave Kleikamp vprintk(fmt, args); 560ac27a0ecSDave Kleikamp printk("\n"); 561ac27a0ecSDave Kleikamp va_end(args); 562ac27a0ecSDave Kleikamp } 563ac27a0ecSDave Kleikamp 564e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 565e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 566e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 567e29136f8STheodore Ts'o const char *fmt, ...) 5685d1b1b3fSAneesh Kumar K.V __releases(bitlock) 5695d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 5705d1b1b3fSAneesh Kumar K.V { 5715d1b1b3fSAneesh Kumar K.V va_list args; 5725d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5735d1b1b3fSAneesh Kumar K.V 5741c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 5751c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5761c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 5775d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 578e29136f8STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", 579e29136f8STheodore Ts'o sb->s_id, function, line, grp); 580e29136f8STheodore Ts'o if (ino) 581e29136f8STheodore Ts'o printk("inode %lu: ", ino); 582e29136f8STheodore Ts'o if (block) 583e29136f8STheodore Ts'o printk("block %llu:", (unsigned long long) block); 5845d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 5855d1b1b3fSAneesh Kumar K.V printk("\n"); 5865d1b1b3fSAneesh Kumar K.V va_end(args); 5875d1b1b3fSAneesh Kumar K.V 5885d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 589e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 5905d1b1b3fSAneesh Kumar K.V return; 5915d1b1b3fSAneesh Kumar K.V } 5921c13d5c0STheodore Ts'o 5935d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 5945d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 5955d1b1b3fSAneesh Kumar K.V /* 5965d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 5975d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 5985d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 5995d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6005d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 6015d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 6025d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6035d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6045d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6055d1b1b3fSAneesh Kumar K.V */ 6065d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6075d1b1b3fSAneesh Kumar K.V return; 6085d1b1b3fSAneesh Kumar K.V } 6095d1b1b3fSAneesh Kumar K.V 610617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 611ac27a0ecSDave Kleikamp { 612617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 613ac27a0ecSDave Kleikamp 614617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 615ac27a0ecSDave Kleikamp return; 616ac27a0ecSDave Kleikamp 61712062dddSEric Sandeen ext4_warning(sb, 618ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 619ac27a0ecSDave Kleikamp "running e2fsck is recommended", 620617ba13bSMingming Cao EXT4_DYNAMIC_REV); 621ac27a0ecSDave Kleikamp 622617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 623617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 624617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 625ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 626ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 627ac27a0ecSDave Kleikamp 628ac27a0ecSDave Kleikamp /* 629ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 630ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 631ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 632ac27a0ecSDave Kleikamp */ 633ac27a0ecSDave Kleikamp } 634ac27a0ecSDave Kleikamp 635ac27a0ecSDave Kleikamp /* 636ac27a0ecSDave Kleikamp * Open the external journal device 637ac27a0ecSDave Kleikamp */ 638b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 639ac27a0ecSDave Kleikamp { 640ac27a0ecSDave Kleikamp struct block_device *bdev; 641ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 642ac27a0ecSDave Kleikamp 643ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 644ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 645ac27a0ecSDave Kleikamp goto fail; 646ac27a0ecSDave Kleikamp return bdev; 647ac27a0ecSDave Kleikamp 648ac27a0ecSDave Kleikamp fail: 649b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 650ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 651ac27a0ecSDave Kleikamp return NULL; 652ac27a0ecSDave Kleikamp } 653ac27a0ecSDave Kleikamp 654ac27a0ecSDave Kleikamp /* 655ac27a0ecSDave Kleikamp * Release the journal device 656ac27a0ecSDave Kleikamp */ 657617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 658ac27a0ecSDave Kleikamp { 659ac27a0ecSDave Kleikamp bd_release(bdev); 6609a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 661ac27a0ecSDave Kleikamp } 662ac27a0ecSDave Kleikamp 663617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 664ac27a0ecSDave Kleikamp { 665ac27a0ecSDave Kleikamp struct block_device *bdev; 666ac27a0ecSDave Kleikamp int ret = -ENODEV; 667ac27a0ecSDave Kleikamp 668ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 669ac27a0ecSDave Kleikamp if (bdev) { 670617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 671ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 672ac27a0ecSDave Kleikamp } 673ac27a0ecSDave Kleikamp return ret; 674ac27a0ecSDave Kleikamp } 675ac27a0ecSDave Kleikamp 676ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 677ac27a0ecSDave Kleikamp { 678617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 679ac27a0ecSDave Kleikamp } 680ac27a0ecSDave Kleikamp 681617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 682ac27a0ecSDave Kleikamp { 683ac27a0ecSDave Kleikamp struct list_head *l; 684ac27a0ecSDave Kleikamp 685b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 686ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 687ac27a0ecSDave Kleikamp 688ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 689ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 690ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 691ac27a0ecSDave Kleikamp printk(KERN_ERR " " 692ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 693ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 694ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 695ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 696ac27a0ecSDave Kleikamp } 697ac27a0ecSDave Kleikamp } 698ac27a0ecSDave Kleikamp 699617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 700ac27a0ecSDave Kleikamp { 701617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 702617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 703ef2cabf7SHidehiro Kawai int i, err; 704ac27a0ecSDave Kleikamp 705e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 706e0ccfd95SChristoph Hellwig 7074c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7084c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7094c0425ffSMingming Cao 710a9e220f8SAl Viro lock_super(sb); 7116cfd0148SChristoph Hellwig lock_kernel(); 7128c85e125SChristoph Hellwig if (sb->s_dirt) 713ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7148c85e125SChristoph Hellwig 7150390131bSFrank Mayhar if (sbi->s_journal) { 716ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 71747b4a50bSJan Kara sbi->s_journal = NULL; 718ef2cabf7SHidehiro Kawai if (err < 0) 719c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7200390131bSFrank Mayhar } 721d4edac31SJosef Bacik 722d4edac31SJosef Bacik ext4_release_system_zone(sb); 723d4edac31SJosef Bacik ext4_mb_release(sb); 724d4edac31SJosef Bacik ext4_ext_release(sb); 725d4edac31SJosef Bacik ext4_xattr_put_super(sb); 726d4edac31SJosef Bacik 727ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 728617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 729ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 730e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 731ac27a0ecSDave Kleikamp } 732240799cdSTheodore Ts'o if (sbi->s_proc) { 7339f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 734240799cdSTheodore Ts'o } 7353197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 736ac27a0ecSDave Kleikamp 737ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 738ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 739ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 740c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 741c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 742c5ca7c76STheodore Ts'o else 743772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 744ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 745ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 746ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7476bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 748ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 749ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 750ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 751ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 752ac27a0ecSDave Kleikamp #endif 753ac27a0ecSDave Kleikamp 754ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 755ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 756ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 757ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 758ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 759ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 760ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 761ac27a0ecSDave Kleikamp 762f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 763ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 764ac27a0ecSDave Kleikamp /* 765ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 766ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 767ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 768ac27a0ecSDave Kleikamp */ 769ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 770f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 771617ba13bSMingming Cao ext4_blkdev_remove(sbi); 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 7743197ebdbSTheodore Ts'o /* 7753197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 7763197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 7773197ebdbSTheodore Ts'o */ 7783197ebdbSTheodore Ts'o unlock_kernel(); 7793197ebdbSTheodore Ts'o unlock_super(sb); 7803197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 7813197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 782705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 783ac27a0ecSDave Kleikamp kfree(sbi); 784ac27a0ecSDave Kleikamp } 785ac27a0ecSDave Kleikamp 786e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 787ac27a0ecSDave Kleikamp 788ac27a0ecSDave Kleikamp /* 789ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 790ac27a0ecSDave Kleikamp */ 791617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 792ac27a0ecSDave Kleikamp { 793617ba13bSMingming Cao struct ext4_inode_info *ei; 794ac27a0ecSDave Kleikamp 795e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 796ac27a0ecSDave Kleikamp if (!ei) 797ac27a0ecSDave Kleikamp return NULL; 7980b8e58a1SAndreas Dilger 799ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 80091246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 801a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 802c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 803c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8040390131bSFrank Mayhar /* 8050390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 8060390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 8070390131bSFrank Mayhar * jinode. 8080390131bSFrank Mayhar */ 809678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 810d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 811d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 812d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8139d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 814d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 815d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 816a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 817a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 818a9e7f447SDmitry Monakhov #endif 819c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 820744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8218d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 822b436b9beSJan Kara ei->i_sync_tid = 0; 823b436b9beSJan Kara ei->i_datasync_tid = 0; 8240b8e58a1SAndreas Dilger 825ac27a0ecSDave Kleikamp return &ei->vfs_inode; 826ac27a0ecSDave Kleikamp } 827ac27a0ecSDave Kleikamp 828617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 829ac27a0ecSDave Kleikamp { 8309f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 831b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 832b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 833b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8349f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8359f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8369f7dd93dSVasily Averin true); 8379f7dd93dSVasily Averin dump_stack(); 8389f7dd93dSVasily Averin } 839617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 840ac27a0ecSDave Kleikamp } 841ac27a0ecSDave Kleikamp 84251cc5068SAlexey Dobriyan static void init_once(void *foo) 843ac27a0ecSDave Kleikamp { 844617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 845ac27a0ecSDave Kleikamp 846ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 84703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 848ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 849ac27a0ecSDave Kleikamp #endif 8500e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 851ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 852ac27a0ecSDave Kleikamp } 853ac27a0ecSDave Kleikamp 854ac27a0ecSDave Kleikamp static int init_inodecache(void) 855ac27a0ecSDave Kleikamp { 856617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 857617ba13bSMingming Cao sizeof(struct ext4_inode_info), 858ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 859ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 86020c2df83SPaul Mundt init_once); 861617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 862ac27a0ecSDave Kleikamp return -ENOMEM; 863ac27a0ecSDave Kleikamp return 0; 864ac27a0ecSDave Kleikamp } 865ac27a0ecSDave Kleikamp 866ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 867ac27a0ecSDave Kleikamp { 868617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 869ac27a0ecSDave Kleikamp } 870ac27a0ecSDave Kleikamp 871617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 872ac27a0ecSDave Kleikamp { 8739f754758SChristoph Hellwig dquot_drop(inode); 874c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 8750390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 876678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 877678aaf48SJan Kara &EXT4_I(inode)->jinode); 878ac27a0ecSDave Kleikamp } 879ac27a0ecSDave Kleikamp 8802b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 8812b2d6d01STheodore Ts'o struct super_block *sb) 882ac27a0ecSDave Kleikamp { 883ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 884617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 885ac27a0ecSDave Kleikamp 8865a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 8875a20bdfcSJan Kara char *fmtname = ""; 8885a20bdfcSJan Kara 8895a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 8905a20bdfcSJan Kara case QFMT_VFS_OLD: 8915a20bdfcSJan Kara fmtname = "vfsold"; 8925a20bdfcSJan Kara break; 8935a20bdfcSJan Kara case QFMT_VFS_V0: 8945a20bdfcSJan Kara fmtname = "vfsv0"; 8955a20bdfcSJan Kara break; 8965a20bdfcSJan Kara case QFMT_VFS_V1: 8975a20bdfcSJan Kara fmtname = "vfsv1"; 8985a20bdfcSJan Kara break; 8995a20bdfcSJan Kara } 9005a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9015a20bdfcSJan Kara } 902ac27a0ecSDave Kleikamp 903ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 904ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 905ac27a0ecSDave Kleikamp 906ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 907ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 908ac27a0ecSDave Kleikamp 909482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 910ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 911ac27a0ecSDave Kleikamp 912482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 913ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 914ac27a0ecSDave Kleikamp #endif 915ac27a0ecSDave Kleikamp } 916ac27a0ecSDave Kleikamp 917d9c9bef1SMiklos Szeredi /* 918d9c9bef1SMiklos Szeredi * Show an option if 919d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 920d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 921d9c9bef1SMiklos Szeredi */ 922617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 923ac27a0ecSDave Kleikamp { 924aa22df2cSAneesh Kumar K.V int def_errors; 925aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 926ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 927d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 928d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 929d9c9bef1SMiklos Szeredi 930d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 931aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 932d9c9bef1SMiklos Szeredi 933d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 934d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 935d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 936d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 937aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 938d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 939d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 940d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 941d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 942d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 943d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 944d9c9bef1SMiklos Szeredi } 945d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 946d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 947d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 948d9c9bef1SMiklos Szeredi } 949bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 950d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 951bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 952d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 953bb4f397aSAneesh Kumar K.V } 954bb4f397aSAneesh Kumar K.V } 955aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 956bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 957aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 958d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 959aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 960d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 961aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 962d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 963d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 964d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 96503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 966aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 967aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 968d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 969d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 970d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 971d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 972d9c9bef1SMiklos Szeredi } 973d9c9bef1SMiklos Szeredi #endif 97403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 975aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 976d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 977d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 978d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 979d9c9bef1SMiklos Szeredi #endif 98030773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 981d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 982d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 983d9c9bef1SMiklos Szeredi } 98430773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 98530773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 98630773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 98730773840STheodore Ts'o } 98830773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 98930773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 99030773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 99130773840STheodore Ts'o } 99230773840STheodore Ts'o 993571640caSEric Sandeen /* 994571640caSEric Sandeen * We're changing the default of barrier mount option, so 995571640caSEric Sandeen * let's always display its mount state so it's clear what its 996571640caSEric Sandeen * status is. 997571640caSEric Sandeen */ 998571640caSEric Sandeen seq_puts(seq, ",barrier="); 999571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1000cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1001cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 100239a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 100339a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 100425ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 100525ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10068b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10078b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1008dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1009dd919b98SAneesh Kumar K.V 1010cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1011cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1012aa22df2cSAneesh Kumar K.V /* 1013aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1014aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1015aa22df2cSAneesh Kumar K.V */ 1016617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1017ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1018617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1019ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1020617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1021ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1022ac27a0ecSDave Kleikamp 1023240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1024240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1025240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1026240799cdSTheodore Ts'o 10275bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10285bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10295bf5683aSHidehiro Kawai 1030afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 103106705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1032afd4672dSTheodore Ts'o 10338b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 10345328e635SEric Sandeen seq_puts(seq, ",discard"); 10355328e635SEric Sandeen 1036e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1037e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1038e3bb52aeSEric Sandeen 1039744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1040744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1041744692dcSJiaying Zhang 10428b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 10438b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 10448b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 10458b67f04aSTheodore Ts'o 1046617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 10470b8e58a1SAndreas Dilger 1048ac27a0ecSDave Kleikamp return 0; 1049ac27a0ecSDave Kleikamp } 1050ac27a0ecSDave Kleikamp 10511b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10521b961ac0SChristoph Hellwig u64 ino, u32 generation) 1053ac27a0ecSDave Kleikamp { 1054ac27a0ecSDave Kleikamp struct inode *inode; 1055ac27a0ecSDave Kleikamp 1056617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1057ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1058617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1059ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1060ac27a0ecSDave Kleikamp 1061ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1062ac27a0ecSDave Kleikamp * 1063617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1064ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1065ac27a0ecSDave Kleikamp * 1066ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1067ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1068ac27a0ecSDave Kleikamp */ 10691d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10701d1fe1eeSDavid Howells if (IS_ERR(inode)) 10711d1fe1eeSDavid Howells return ERR_CAST(inode); 10721d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1073ac27a0ecSDave Kleikamp iput(inode); 1074ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1075ac27a0ecSDave Kleikamp } 10761b961ac0SChristoph Hellwig 10771b961ac0SChristoph Hellwig return inode; 1078ac27a0ecSDave Kleikamp } 10791b961ac0SChristoph Hellwig 10801b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10811b961ac0SChristoph Hellwig int fh_len, int fh_type) 10821b961ac0SChristoph Hellwig { 10831b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10841b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10851b961ac0SChristoph Hellwig } 10861b961ac0SChristoph Hellwig 10871b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10881b961ac0SChristoph Hellwig int fh_len, int fh_type) 10891b961ac0SChristoph Hellwig { 10901b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10911b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1092ac27a0ecSDave Kleikamp } 1093ac27a0ecSDave Kleikamp 1094c39a7f84SToshiyuki Okajima /* 1095c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1096c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1097c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1098c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1099c39a7f84SToshiyuki Okajima */ 11000b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11010b8e58a1SAndreas Dilger gfp_t wait) 1102c39a7f84SToshiyuki Okajima { 1103c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1104c39a7f84SToshiyuki Okajima 1105c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1106c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1107c39a7f84SToshiyuki Okajima return 0; 1108c39a7f84SToshiyuki Okajima if (journal) 1109c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1110c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1111c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1112c39a7f84SToshiyuki Okajima } 1113c39a7f84SToshiyuki Okajima 1114ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1115ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1116ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1117ac27a0ecSDave Kleikamp 1118617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1119617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1120617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1121617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1122617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11236f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1124307ae18aSChristoph Hellwig char *path); 1125ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1126617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1127617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1128ac27a0ecSDave Kleikamp size_t len, loff_t off); 1129617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1130ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1131ac27a0ecSDave Kleikamp 113261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 1133a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 113460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1135a9e7f447SDmitry Monakhov #endif 1136617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1137617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1138617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1139617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1140a5b5ee32SJan Kara .write_info = ext4_write_info, 1141a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1142a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1143ac27a0ecSDave Kleikamp }; 1144ac27a0ecSDave Kleikamp 11450d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1146617ba13bSMingming Cao .quota_on = ext4_quota_on, 1147ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1148287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1149287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1150287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1151287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1152287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1153ac27a0ecSDave Kleikamp }; 1154ac27a0ecSDave Kleikamp #endif 1155ac27a0ecSDave Kleikamp 1156ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1157617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1158617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1159617ba13bSMingming Cao .write_inode = ext4_write_inode, 1160617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1161617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1162617ba13bSMingming Cao .put_super = ext4_put_super, 1163617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1164c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1165c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1166617ba13bSMingming Cao .statfs = ext4_statfs, 1167617ba13bSMingming Cao .remount_fs = ext4_remount, 1168617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1169617ba13bSMingming Cao .show_options = ext4_show_options, 1170ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1171617ba13bSMingming Cao .quota_read = ext4_quota_read, 1172617ba13bSMingming Cao .quota_write = ext4_quota_write, 1173ac27a0ecSDave Kleikamp #endif 1174c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1175ac27a0ecSDave Kleikamp }; 1176ac27a0ecSDave Kleikamp 11779ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11789ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11799ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11809ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11819ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11829ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 11839ca92389STheodore Ts'o .write_super = ext4_write_super, 11849ca92389STheodore Ts'o .put_super = ext4_put_super, 11859ca92389STheodore Ts'o .statfs = ext4_statfs, 11869ca92389STheodore Ts'o .remount_fs = ext4_remount, 11879ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 11889ca92389STheodore Ts'o .show_options = ext4_show_options, 11899ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11909ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11919ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11929ca92389STheodore Ts'o #endif 11939ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11949ca92389STheodore Ts'o }; 11959ca92389STheodore Ts'o 119639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11971b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11981b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1199617ba13bSMingming Cao .get_parent = ext4_get_parent, 1200ac27a0ecSDave Kleikamp }; 1201ac27a0ecSDave Kleikamp 1202ac27a0ecSDave Kleikamp enum { 1203ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1204ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 120501436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1206ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 120706705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 120830773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1209c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1210818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1211ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1212296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1213ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12145a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12155a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12165a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 121701436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 12186fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 12195328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1220744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12215328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1222ac27a0ecSDave Kleikamp }; 1223ac27a0ecSDave Kleikamp 1224a447c093SSteven Whitehouse static const match_table_t tokens = { 1225ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1226ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1227ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1228ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1229ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1230ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1231ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1232ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1233ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1234ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1235ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1236ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1237ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1238ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1239ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1240ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1241ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1242ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1243ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1244ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1245ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1246e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1247ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1248ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1249ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 125030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 125130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1252ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1253ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1254818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1255818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1256ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1257ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1258ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1259ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12605bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12615bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1262ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1263ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1264ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1265ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1266ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1267ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12685a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1269ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1270ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1271ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1272ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1273ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 127406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 127506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 127625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1277c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1278ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 127964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1280dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12816fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12826fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1283240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1284b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1285afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 128606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 128706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1288744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1289744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12905328e635SEric Sandeen {Opt_discard, "discard"}, 12915328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1292f3f12faaSJosef Bacik {Opt_err, NULL}, 1293ac27a0ecSDave Kleikamp }; 1294ac27a0ecSDave Kleikamp 1295617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1296ac27a0ecSDave Kleikamp { 1297617ba13bSMingming Cao ext4_fsblk_t sb_block; 1298ac27a0ecSDave Kleikamp char *options = (char *) *data; 1299ac27a0ecSDave Kleikamp 1300ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1301ac27a0ecSDave Kleikamp return 1; /* Default location */ 13020b8e58a1SAndreas Dilger 1303ac27a0ecSDave Kleikamp options += 3; 13040b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1305ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1306ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13074776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1308ac27a0ecSDave Kleikamp (char *) *data); 1309ac27a0ecSDave Kleikamp return 1; 1310ac27a0ecSDave Kleikamp } 1311ac27a0ecSDave Kleikamp if (*options == ',') 1312ac27a0ecSDave Kleikamp options++; 1313ac27a0ecSDave Kleikamp *data = (void *) options; 13140b8e58a1SAndreas Dilger 1315ac27a0ecSDave Kleikamp return sb_block; 1316ac27a0ecSDave Kleikamp } 1317ac27a0ecSDave Kleikamp 1318b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1319437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1320437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1321b3881f74STheodore Ts'o 132256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 132356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 132456c50f11SDmitry Monakhov { 132556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 132656c50f11SDmitry Monakhov char *qname; 132756c50f11SDmitry Monakhov 132856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 132956c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 133056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 133156c50f11SDmitry Monakhov "Cannot change journaled " 133256c50f11SDmitry Monakhov "quota options when quota turned on"); 133356c50f11SDmitry Monakhov return 0; 133456c50f11SDmitry Monakhov } 133556c50f11SDmitry Monakhov qname = match_strdup(args); 133656c50f11SDmitry Monakhov if (!qname) { 133756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 133856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 133956c50f11SDmitry Monakhov return 0; 134056c50f11SDmitry Monakhov } 134156c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 134256c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 134356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 134456c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 134556c50f11SDmitry Monakhov kfree(qname); 134656c50f11SDmitry Monakhov return 0; 134756c50f11SDmitry Monakhov } 134856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 134956c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 135056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135156c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 135256c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 135356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 135456c50f11SDmitry Monakhov return 0; 135556c50f11SDmitry Monakhov } 135656c50f11SDmitry Monakhov set_opt(sbi->s_mount_opt, QUOTA); 135756c50f11SDmitry Monakhov return 1; 135856c50f11SDmitry Monakhov } 135956c50f11SDmitry Monakhov 136056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 136156c50f11SDmitry Monakhov { 136256c50f11SDmitry Monakhov 136356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 136456c50f11SDmitry Monakhov 136556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 136656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 136756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 136856c50f11SDmitry Monakhov " when quota turned on"); 136956c50f11SDmitry Monakhov return 0; 137056c50f11SDmitry Monakhov } 137156c50f11SDmitry Monakhov /* 137256c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 137356c50f11SDmitry Monakhov * to be correct 137456c50f11SDmitry Monakhov */ 137556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137656c50f11SDmitry Monakhov return 1; 137756c50f11SDmitry Monakhov } 137856c50f11SDmitry Monakhov #endif 137956c50f11SDmitry Monakhov 1380ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1381c3191067STheodore Ts'o unsigned long *journal_devnum, 1382b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1383617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1384ac27a0ecSDave Kleikamp { 1385617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1386ac27a0ecSDave Kleikamp char *p; 1387ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1388ac27a0ecSDave Kleikamp int data_opt = 0; 1389ac27a0ecSDave Kleikamp int option; 1390ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 139156c50f11SDmitry Monakhov int qfmt; 1392ac27a0ecSDave Kleikamp #endif 1393ac27a0ecSDave Kleikamp 1394ac27a0ecSDave Kleikamp if (!options) 1395ac27a0ecSDave Kleikamp return 1; 1396ac27a0ecSDave Kleikamp 1397ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1398ac27a0ecSDave Kleikamp int token; 1399ac27a0ecSDave Kleikamp if (!*p) 1400ac27a0ecSDave Kleikamp continue; 1401ac27a0ecSDave Kleikamp 140215121c18SEric Sandeen /* 140315121c18SEric Sandeen * Initialize args struct so we know whether arg was 140415121c18SEric Sandeen * found; some options take optional arguments. 140515121c18SEric Sandeen */ 140615121c18SEric Sandeen args[0].to = args[0].from = 0; 1407ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1408ac27a0ecSDave Kleikamp switch (token) { 1409ac27a0ecSDave Kleikamp case Opt_bsd_df: 1410437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1411ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1412ac27a0ecSDave Kleikamp break; 1413ac27a0ecSDave Kleikamp case Opt_minix_df: 1414437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1415ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1416437ca0fdSDmitry Monakhov 1417ac27a0ecSDave Kleikamp break; 1418ac27a0ecSDave Kleikamp case Opt_grpid: 1419437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1420ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1421437ca0fdSDmitry Monakhov 1422ac27a0ecSDave Kleikamp break; 1423ac27a0ecSDave Kleikamp case Opt_nogrpid: 1424437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1425ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1426437ca0fdSDmitry Monakhov 1427ac27a0ecSDave Kleikamp break; 1428ac27a0ecSDave Kleikamp case Opt_resuid: 1429ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1430ac27a0ecSDave Kleikamp return 0; 1431ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1432ac27a0ecSDave Kleikamp break; 1433ac27a0ecSDave Kleikamp case Opt_resgid: 1434ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1435ac27a0ecSDave Kleikamp return 0; 1436ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1437ac27a0ecSDave Kleikamp break; 1438ac27a0ecSDave Kleikamp case Opt_sb: 1439ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1440ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1441ac27a0ecSDave Kleikamp break; 1442ac27a0ecSDave Kleikamp case Opt_err_panic: 1443ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1444ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1445ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1446ac27a0ecSDave Kleikamp break; 1447ac27a0ecSDave Kleikamp case Opt_err_ro: 1448ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1449ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1450ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1451ac27a0ecSDave Kleikamp break; 1452ac27a0ecSDave Kleikamp case Opt_err_cont: 1453ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1454ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1455ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1456ac27a0ecSDave Kleikamp break; 1457ac27a0ecSDave Kleikamp case Opt_nouid32: 1458ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1459ac27a0ecSDave Kleikamp break; 1460ac27a0ecSDave Kleikamp case Opt_debug: 1461ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1462ac27a0ecSDave Kleikamp break; 1463ac27a0ecSDave Kleikamp case Opt_oldalloc: 1464ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1465ac27a0ecSDave Kleikamp break; 1466ac27a0ecSDave Kleikamp case Opt_orlov: 1467ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1468ac27a0ecSDave Kleikamp break; 146903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1470ac27a0ecSDave Kleikamp case Opt_user_xattr: 1471ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1472ac27a0ecSDave Kleikamp break; 1473ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1474ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1475ac27a0ecSDave Kleikamp break; 1476ac27a0ecSDave Kleikamp #else 1477ac27a0ecSDave Kleikamp case Opt_user_xattr: 1478ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1479b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1480ac27a0ecSDave Kleikamp break; 1481ac27a0ecSDave Kleikamp #endif 148203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1483ac27a0ecSDave Kleikamp case Opt_acl: 1484ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1485ac27a0ecSDave Kleikamp break; 1486ac27a0ecSDave Kleikamp case Opt_noacl: 1487ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1488ac27a0ecSDave Kleikamp break; 1489ac27a0ecSDave Kleikamp #else 1490ac27a0ecSDave Kleikamp case Opt_acl: 1491ac27a0ecSDave Kleikamp case Opt_noacl: 1492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1493ac27a0ecSDave Kleikamp break; 1494ac27a0ecSDave Kleikamp #endif 1495ac27a0ecSDave Kleikamp case Opt_journal_update: 1496ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1497ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1498ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1499ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1500ac27a0ecSDave Kleikamp journal file. */ 1501ac27a0ecSDave Kleikamp if (is_remount) { 1502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1503b31e1552SEric Sandeen "Cannot specify journal on remount"); 1504ac27a0ecSDave Kleikamp return 0; 1505ac27a0ecSDave Kleikamp } 1506ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1507ac27a0ecSDave Kleikamp break; 1508ac27a0ecSDave Kleikamp case Opt_journal_dev: 1509ac27a0ecSDave Kleikamp if (is_remount) { 1510b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1511b31e1552SEric Sandeen "Cannot specify journal on remount"); 1512ac27a0ecSDave Kleikamp return 0; 1513ac27a0ecSDave Kleikamp } 1514ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1515ac27a0ecSDave Kleikamp return 0; 1516ac27a0ecSDave Kleikamp *journal_devnum = option; 1517ac27a0ecSDave Kleikamp break; 1518818d276cSGirish Shilamkar case Opt_journal_checksum: 1519d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1520d4da6c9cSLinus Torvalds break; 1521818d276cSGirish Shilamkar case Opt_journal_async_commit: 1522818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1523d4da6c9cSLinus Torvalds set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1524818d276cSGirish Shilamkar break; 1525ac27a0ecSDave Kleikamp case Opt_noload: 1526ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1527ac27a0ecSDave Kleikamp break; 1528ac27a0ecSDave Kleikamp case Opt_commit: 1529ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1530ac27a0ecSDave Kleikamp return 0; 1531ac27a0ecSDave Kleikamp if (option < 0) 1532ac27a0ecSDave Kleikamp return 0; 1533ac27a0ecSDave Kleikamp if (option == 0) 1534cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1535ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1536ac27a0ecSDave Kleikamp break; 153730773840STheodore Ts'o case Opt_max_batch_time: 153830773840STheodore Ts'o if (match_int(&args[0], &option)) 153930773840STheodore Ts'o return 0; 154030773840STheodore Ts'o if (option < 0) 154130773840STheodore Ts'o return 0; 154230773840STheodore Ts'o if (option == 0) 154330773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 154430773840STheodore Ts'o sbi->s_max_batch_time = option; 154530773840STheodore Ts'o break; 154630773840STheodore Ts'o case Opt_min_batch_time: 154730773840STheodore Ts'o if (match_int(&args[0], &option)) 154830773840STheodore Ts'o return 0; 154930773840STheodore Ts'o if (option < 0) 155030773840STheodore Ts'o return 0; 155130773840STheodore Ts'o sbi->s_min_batch_time = option; 155230773840STheodore Ts'o break; 1553ac27a0ecSDave Kleikamp case Opt_data_journal: 1554617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1555ac27a0ecSDave Kleikamp goto datacheck; 1556ac27a0ecSDave Kleikamp case Opt_data_ordered: 1557617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1558ac27a0ecSDave Kleikamp goto datacheck; 1559ac27a0ecSDave Kleikamp case Opt_data_writeback: 1560617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1561ac27a0ecSDave Kleikamp datacheck: 1562ac27a0ecSDave Kleikamp if (is_remount) { 1563482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1564b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1565b31e1552SEric Sandeen "Cannot change data mode on remount"); 1566ac27a0ecSDave Kleikamp return 0; 1567ac27a0ecSDave Kleikamp } 1568ac27a0ecSDave Kleikamp } else { 1569482a7425SDmitry Monakhov clear_opt(sbi->s_mount_opt, DATA_FLAGS); 1570ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1571ac27a0ecSDave Kleikamp } 1572ac27a0ecSDave Kleikamp break; 15735bf5683aSHidehiro Kawai case Opt_data_err_abort: 15745bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15755bf5683aSHidehiro Kawai break; 15765bf5683aSHidehiro Kawai case Opt_data_err_ignore: 15775bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 15785bf5683aSHidehiro Kawai break; 1579ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1580ac27a0ecSDave Kleikamp case Opt_usrjquota: 158156c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 158256c50f11SDmitry Monakhov return 0; 158356c50f11SDmitry Monakhov break; 1584ac27a0ecSDave Kleikamp case Opt_grpjquota: 158556c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1586ac27a0ecSDave Kleikamp return 0; 1587ac27a0ecSDave Kleikamp break; 1588ac27a0ecSDave Kleikamp case Opt_offusrjquota: 158956c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1590ac27a0ecSDave Kleikamp return 0; 1591ac27a0ecSDave Kleikamp break; 159256c50f11SDmitry Monakhov case Opt_offgrpjquota: 159356c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 159456c50f11SDmitry Monakhov return 0; 159556c50f11SDmitry Monakhov break; 159656c50f11SDmitry Monakhov 1597ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1598dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1599dfc5d03fSJan Kara goto set_qf_format; 1600ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1601dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16025a20bdfcSJan Kara goto set_qf_format; 16035a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16045a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1605dfc5d03fSJan Kara set_qf_format: 160617bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1607dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1609dfc5d03fSJan Kara "journaled quota options when " 1610b31e1552SEric Sandeen "quota turned on"); 1611dfc5d03fSJan Kara return 0; 1612dfc5d03fSJan Kara } 1613dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1614ac27a0ecSDave Kleikamp break; 1615ac27a0ecSDave Kleikamp case Opt_quota: 1616ac27a0ecSDave Kleikamp case Opt_usrquota: 1617ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1618ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1619ac27a0ecSDave Kleikamp break; 1620ac27a0ecSDave Kleikamp case Opt_grpquota: 1621ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1622ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1623ac27a0ecSDave Kleikamp break; 1624ac27a0ecSDave Kleikamp case Opt_noquota: 162517bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1626b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1627b31e1552SEric Sandeen "options when quota turned on"); 1628ac27a0ecSDave Kleikamp return 0; 1629ac27a0ecSDave Kleikamp } 1630ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1631ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1632ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1633ac27a0ecSDave Kleikamp break; 1634ac27a0ecSDave Kleikamp #else 1635ac27a0ecSDave Kleikamp case Opt_quota: 1636ac27a0ecSDave Kleikamp case Opt_usrquota: 1637ac27a0ecSDave Kleikamp case Opt_grpquota: 1638b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1639b31e1552SEric Sandeen "quota options not supported"); 1640cd59e7b9SJan Kara break; 1641ac27a0ecSDave Kleikamp case Opt_usrjquota: 1642ac27a0ecSDave Kleikamp case Opt_grpjquota: 1643ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1644ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1645ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1646ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 16475a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1648b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1649b31e1552SEric Sandeen "journaled quota options not supported"); 1650ac27a0ecSDave Kleikamp break; 1651ac27a0ecSDave Kleikamp case Opt_noquota: 1652ac27a0ecSDave Kleikamp break; 1653ac27a0ecSDave Kleikamp #endif 1654ac27a0ecSDave Kleikamp case Opt_abort: 16554ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1656ac27a0ecSDave Kleikamp break; 165706705bffSTheodore Ts'o case Opt_nobarrier: 165806705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 165906705bffSTheodore Ts'o break; 1660ac27a0ecSDave Kleikamp case Opt_barrier: 166115121c18SEric Sandeen if (args[0].from) { 166215121c18SEric Sandeen if (match_int(&args[0], &option)) 166315121c18SEric Sandeen return 0; 166415121c18SEric Sandeen } else 166515121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1666ac27a0ecSDave Kleikamp if (option) 1667ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1668ac27a0ecSDave Kleikamp else 1669ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1670ac27a0ecSDave Kleikamp break; 1671ac27a0ecSDave Kleikamp case Opt_ignore: 1672ac27a0ecSDave Kleikamp break; 1673ac27a0ecSDave Kleikamp case Opt_resize: 1674ac27a0ecSDave Kleikamp if (!is_remount) { 1675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1676b31e1552SEric Sandeen "resize option only available " 1677b31e1552SEric Sandeen "for remount"); 1678ac27a0ecSDave Kleikamp return 0; 1679ac27a0ecSDave Kleikamp } 1680ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1681ac27a0ecSDave Kleikamp return 0; 1682ac27a0ecSDave Kleikamp *n_blocks_count = option; 1683ac27a0ecSDave Kleikamp break; 1684ac27a0ecSDave Kleikamp case Opt_nobh: 1685206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1686206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1687ac27a0ecSDave Kleikamp break; 1688ac27a0ecSDave Kleikamp case Opt_bh: 1689206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1690206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1691ac27a0ecSDave Kleikamp break; 169225ec56b5SJean Noel Cordenner case Opt_i_version: 169325ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 169425ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 169525ec56b5SJean Noel Cordenner break; 1696dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1697dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1698dd919b98SAneesh Kumar K.V break; 1699c9de560dSAlex Tomas case Opt_stripe: 1700c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1701c9de560dSAlex Tomas return 0; 1702c9de560dSAlex Tomas if (option < 0) 1703c9de560dSAlex Tomas return 0; 1704c9de560dSAlex Tomas sbi->s_stripe = option; 1705c9de560dSAlex Tomas break; 170664769240SAlex Tomas case Opt_delalloc: 170764769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 170864769240SAlex Tomas break; 17096fd058f7STheodore Ts'o case Opt_block_validity: 17106fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 17116fd058f7STheodore Ts'o break; 17126fd058f7STheodore Ts'o case Opt_noblock_validity: 17136fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 17146fd058f7STheodore Ts'o break; 1715240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1716240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1717240799cdSTheodore Ts'o return 0; 1718240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1719240799cdSTheodore Ts'o return 0; 1720f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1721b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1722b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1723b31e1552SEric Sandeen " must be a power of 2"); 17243197ebdbSTheodore Ts'o return 0; 17253197ebdbSTheodore Ts'o } 1726240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1727240799cdSTheodore Ts'o break; 1728b3881f74STheodore Ts'o case Opt_journal_ioprio: 1729b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1730b3881f74STheodore Ts'o return 0; 1731b3881f74STheodore Ts'o if (option < 0 || option > 7) 1732b3881f74STheodore Ts'o break; 1733b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1734b3881f74STheodore Ts'o option); 1735b3881f74STheodore Ts'o break; 173606705bffSTheodore Ts'o case Opt_noauto_da_alloc: 173706705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 173806705bffSTheodore Ts'o break; 1739afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 174015121c18SEric Sandeen if (args[0].from) { 174115121c18SEric Sandeen if (match_int(&args[0], &option)) 174215121c18SEric Sandeen return 0; 174315121c18SEric Sandeen } else 174415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1745afd4672dSTheodore Ts'o if (option) 1746afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1747afd4672dSTheodore Ts'o else 1748afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1749afd4672dSTheodore Ts'o break; 17505328e635SEric Sandeen case Opt_discard: 17515328e635SEric Sandeen set_opt(sbi->s_mount_opt, DISCARD); 17525328e635SEric Sandeen break; 17535328e635SEric Sandeen case Opt_nodiscard: 17545328e635SEric Sandeen clear_opt(sbi->s_mount_opt, DISCARD); 17555328e635SEric Sandeen break; 1756744692dcSJiaying Zhang case Opt_dioread_nolock: 1757744692dcSJiaying Zhang set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1758744692dcSJiaying Zhang break; 1759744692dcSJiaying Zhang case Opt_dioread_lock: 1760744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 1761744692dcSJiaying Zhang break; 1762ac27a0ecSDave Kleikamp default: 1763b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1764b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1765b31e1552SEric Sandeen "or missing value", p); 1766ac27a0ecSDave Kleikamp return 0; 1767ac27a0ecSDave Kleikamp } 1768ac27a0ecSDave Kleikamp } 1769ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1770ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1771482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1772ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1773ac27a0ecSDave Kleikamp 1774482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1775ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1776ac27a0ecSDave Kleikamp 177756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1779b31e1552SEric Sandeen "format mixing"); 1780ac27a0ecSDave Kleikamp return 0; 1781ac27a0ecSDave Kleikamp } 1782ac27a0ecSDave Kleikamp 1783ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1784b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1785b31e1552SEric Sandeen "not specified"); 1786ac27a0ecSDave Kleikamp return 0; 1787ac27a0ecSDave Kleikamp } 1788ac27a0ecSDave Kleikamp } else { 1789ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17912c8be6b2SJan Kara "specified with no journaling " 1792b31e1552SEric Sandeen "enabled"); 1793ac27a0ecSDave Kleikamp return 0; 1794ac27a0ecSDave Kleikamp } 1795ac27a0ecSDave Kleikamp } 1796ac27a0ecSDave Kleikamp #endif 1797ac27a0ecSDave Kleikamp return 1; 1798ac27a0ecSDave Kleikamp } 1799ac27a0ecSDave Kleikamp 1800617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1801ac27a0ecSDave Kleikamp int read_only) 1802ac27a0ecSDave Kleikamp { 1803617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1804ac27a0ecSDave Kleikamp int res = 0; 1805ac27a0ecSDave Kleikamp 1806617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1808b31e1552SEric Sandeen "forcing read-only mode"); 1809ac27a0ecSDave Kleikamp res = MS_RDONLY; 1810ac27a0ecSDave Kleikamp } 1811ac27a0ecSDave Kleikamp if (read_only) 1812ac27a0ecSDave Kleikamp return res; 1813617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1814b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1815b31e1552SEric Sandeen "running e2fsck is recommended"); 1816617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1817b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1818b31e1552SEric Sandeen "warning: mounting fs with errors, " 1819b31e1552SEric Sandeen "running e2fsck is recommended"); 1820ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1821ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1822ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1823b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1824b31e1552SEric Sandeen "warning: maximal mount count reached, " 1825b31e1552SEric Sandeen "running e2fsck is recommended"); 1826ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1827ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1828ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1829b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1830b31e1552SEric Sandeen "warning: checktime reached, " 1831b31e1552SEric Sandeen "running e2fsck is recommended"); 18320390131bSFrank Mayhar if (!sbi->s_journal) 1833216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1834ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1835617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1836e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1837ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1838617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18390390131bSFrank Mayhar if (sbi->s_journal) 1840617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1841ac27a0ecSDave Kleikamp 1842e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1843ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1844a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 18457f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1846ac27a0ecSDave Kleikamp sb->s_blocksize, 1847ac27a0ecSDave Kleikamp sbi->s_groups_count, 1848617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1849617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1850ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1851ac27a0ecSDave Kleikamp 1852ac27a0ecSDave Kleikamp return res; 1853ac27a0ecSDave Kleikamp } 1854ac27a0ecSDave Kleikamp 1855772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1856772cb7c8SJose R. Santos { 1857772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1858772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1859772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1860772cb7c8SJose R. Santos ext4_group_t flex_group; 1861772cb7c8SJose R. Santos int groups_per_flex = 0; 1862c5ca7c76STheodore Ts'o size_t size; 1863772cb7c8SJose R. Santos int i; 1864772cb7c8SJose R. Santos 1865503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1866503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1867503358aeSTheodore Ts'o 1868503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1869772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1870772cb7c8SJose R. Santos return 1; 1871772cb7c8SJose R. Santos } 1872772cb7c8SJose R. Santos 1873c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1874c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1875d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1876d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1877c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1878c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1879c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1880c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1881c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1882c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1883c5ca7c76STheodore Ts'o } 1884772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1885b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1886b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1887772cb7c8SJose R. Santos goto failed; 1888772cb7c8SJose R. Santos } 1889772cb7c8SJose R. Santos 1890772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 189188b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1892772cb7c8SJose R. Santos 1893772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 18947ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 18957ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 18967ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 18977ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 18987ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 18997ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1900772cb7c8SJose R. Santos } 1901772cb7c8SJose R. Santos 1902772cb7c8SJose R. Santos return 1; 1903772cb7c8SJose R. Santos failed: 1904772cb7c8SJose R. Santos return 0; 1905772cb7c8SJose R. Santos } 1906772cb7c8SJose R. Santos 1907717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1908717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1909717d50e4SAndreas Dilger { 1910717d50e4SAndreas Dilger __u16 crc = 0; 1911717d50e4SAndreas Dilger 1912717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1913717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1914717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1915717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1916717d50e4SAndreas Dilger 1917717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1918717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1919717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1920717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1921717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1922717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1923717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1924717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1925717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1926717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1927717d50e4SAndreas Dilger offset); 1928717d50e4SAndreas Dilger } 1929717d50e4SAndreas Dilger 1930717d50e4SAndreas Dilger return cpu_to_le16(crc); 1931717d50e4SAndreas Dilger } 1932717d50e4SAndreas Dilger 1933717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1934717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1935717d50e4SAndreas Dilger { 1936717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1937717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1938717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1939717d50e4SAndreas Dilger return 0; 1940717d50e4SAndreas Dilger 1941717d50e4SAndreas Dilger return 1; 1942717d50e4SAndreas Dilger } 1943717d50e4SAndreas Dilger 1944ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1945617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1946ac27a0ecSDave Kleikamp { 1947617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1948617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1949617ba13bSMingming Cao ext4_fsblk_t last_block; 1950bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1951bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1952bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1953ce421581SJose R. Santos int flexbg_flag = 0; 1954fd2d4291SAvantika Mathur ext4_group_t i; 1955ac27a0ecSDave Kleikamp 1956ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1957ce421581SJose R. Santos flexbg_flag = 1; 1958ce421581SJose R. Santos 1959617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1960ac27a0ecSDave Kleikamp 1961197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1962197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1963197cd65aSAkinobu Mita 1964ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1965bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1966ac27a0ecSDave Kleikamp else 1967ac27a0ecSDave Kleikamp last_block = first_block + 1968617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1969ac27a0ecSDave Kleikamp 19708fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 19712b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1972b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1973a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1974b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1975ac27a0ecSDave Kleikamp return 0; 1976ac27a0ecSDave Kleikamp } 19778fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 19782b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1979b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1980a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1981b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1982ac27a0ecSDave Kleikamp return 0; 1983ac27a0ecSDave Kleikamp } 19848fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1985bd81d8eeSLaurent Vivier if (inode_table < first_block || 19862b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1987b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1988a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1989b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1990ac27a0ecSDave Kleikamp return 0; 1991ac27a0ecSDave Kleikamp } 1992955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1993717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1995b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1996fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1997fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 19987ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1999955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2000717d50e4SAndreas Dilger return 0; 2001717d50e4SAndreas Dilger } 20027ee1ec4cSLi Zefan } 2003955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2004ce421581SJose R. Santos if (!flexbg_flag) 2005617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2006ac27a0ecSDave Kleikamp } 2007ac27a0ecSDave Kleikamp 2008bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2009617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2010ac27a0ecSDave Kleikamp return 1; 2011ac27a0ecSDave Kleikamp } 2012ac27a0ecSDave Kleikamp 2013617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2014ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2015ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2016ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2017ac27a0ecSDave Kleikamp * 2018ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2019ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2020ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2021ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2022ac27a0ecSDave Kleikamp * 2023ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2024ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2025ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2026617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2027ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2028ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2029ac27a0ecSDave Kleikamp */ 2030617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2031617ba13bSMingming Cao struct ext4_super_block *es) 2032ac27a0ecSDave Kleikamp { 2033ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2034ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2035ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2036ac27a0ecSDave Kleikamp int i; 2037ac27a0ecSDave Kleikamp #endif 2038ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2039ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2040ac27a0ecSDave Kleikamp return; 2041ac27a0ecSDave Kleikamp } 2042ac27a0ecSDave Kleikamp 2043a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2044b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2045b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2046a8f48a95SEric Sandeen return; 2047a8f48a95SEric Sandeen } 2048a8f48a95SEric Sandeen 2049617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2050ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2051ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2052ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2053ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2054ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2055ac27a0ecSDave Kleikamp return; 2056ac27a0ecSDave Kleikamp } 2057ac27a0ecSDave Kleikamp 2058ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2059b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2060ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2061ac27a0ecSDave Kleikamp } 2062ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2063ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2064ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2065ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2066ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2067617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2068617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2069ac27a0ecSDave Kleikamp if (ret < 0) 2070b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2071b31e1552SEric Sandeen "Cannot turn on journaled " 2072b31e1552SEric Sandeen "quota: error %d", ret); 2073ac27a0ecSDave Kleikamp } 2074ac27a0ecSDave Kleikamp } 2075ac27a0ecSDave Kleikamp #endif 2076ac27a0ecSDave Kleikamp 2077ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2078ac27a0ecSDave Kleikamp struct inode *inode; 2079ac27a0ecSDave Kleikamp 208097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 208197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2082ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2083ac27a0ecSDave Kleikamp break; 2084ac27a0ecSDave Kleikamp } 2085ac27a0ecSDave Kleikamp 2086617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2087871a2931SChristoph Hellwig dquot_initialize(inode); 2088ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2089b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2090b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 209146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2092e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2093ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2094617ba13bSMingming Cao ext4_truncate(inode); 2095ac27a0ecSDave Kleikamp nr_truncates++; 2096ac27a0ecSDave Kleikamp } else { 2097b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2098b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 209946e665e9SHarvey Harrison __func__, inode->i_ino); 2100ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2101ac27a0ecSDave Kleikamp inode->i_ino); 2102ac27a0ecSDave Kleikamp nr_orphans++; 2103ac27a0ecSDave Kleikamp } 2104ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2105ac27a0ecSDave Kleikamp } 2106ac27a0ecSDave Kleikamp 2107ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2108ac27a0ecSDave Kleikamp 2109ac27a0ecSDave Kleikamp if (nr_orphans) 2110b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2111b31e1552SEric Sandeen PLURAL(nr_orphans)); 2112ac27a0ecSDave Kleikamp if (nr_truncates) 2113b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2114b31e1552SEric Sandeen PLURAL(nr_truncates)); 2115ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2116ac27a0ecSDave Kleikamp /* Turn quotas off */ 2117ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2118ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2119287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2120ac27a0ecSDave Kleikamp } 2121ac27a0ecSDave Kleikamp #endif 2122ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2123ac27a0ecSDave Kleikamp } 21240b8e58a1SAndreas Dilger 2125cd2291a4SEric Sandeen /* 2126cd2291a4SEric Sandeen * Maximal extent format file size. 2127cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2128cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2129cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2130cd2291a4SEric Sandeen * so that won't be a limiting factor. 2131cd2291a4SEric Sandeen * 2132cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2133cd2291a4SEric Sandeen */ 2134f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2135cd2291a4SEric Sandeen { 2136cd2291a4SEric Sandeen loff_t res; 2137cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2138cd2291a4SEric Sandeen 2139cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2140f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2141cd2291a4SEric Sandeen /* 214290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2143cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2144cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2145cd2291a4SEric Sandeen */ 2146cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2147cd2291a4SEric Sandeen 2148cd2291a4SEric Sandeen /* total blocks in file system block size */ 2149cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2150cd2291a4SEric Sandeen upper_limit <<= blkbits; 2151cd2291a4SEric Sandeen } 2152cd2291a4SEric Sandeen 2153cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2154cd2291a4SEric Sandeen res = 1LL << 32; 2155cd2291a4SEric Sandeen res <<= blkbits; 2156cd2291a4SEric Sandeen res -= 1; 2157cd2291a4SEric Sandeen 2158cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2159cd2291a4SEric Sandeen if (res > upper_limit) 2160cd2291a4SEric Sandeen res = upper_limit; 2161cd2291a4SEric Sandeen 2162cd2291a4SEric Sandeen return res; 2163cd2291a4SEric Sandeen } 2164ac27a0ecSDave Kleikamp 2165ac27a0ecSDave Kleikamp /* 2166cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 21670fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 21680fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2169ac27a0ecSDave Kleikamp */ 2170f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2171ac27a0ecSDave Kleikamp { 2172617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 21730fc1b451SAneesh Kumar K.V int meta_blocks; 21740fc1b451SAneesh Kumar K.V loff_t upper_limit; 21750b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 21760b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 21770b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 21780b8e58a1SAndreas Dilger * 21790b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 21800b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 21810fc1b451SAneesh Kumar K.V */ 21820fc1b451SAneesh Kumar K.V 2183f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 21840fc1b451SAneesh Kumar K.V /* 218590c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 21860b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 21870b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 21880fc1b451SAneesh Kumar K.V */ 21890fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 21900fc1b451SAneesh Kumar K.V 21910fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 21920fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 21930fc1b451SAneesh Kumar K.V 21940fc1b451SAneesh Kumar K.V } else { 21958180a562SAneesh Kumar K.V /* 21968180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 21978180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 21988180a562SAneesh Kumar K.V * represent total number of blocks in 21998180a562SAneesh Kumar K.V * file system block size 22008180a562SAneesh Kumar K.V */ 22010fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22020fc1b451SAneesh Kumar K.V 22030fc1b451SAneesh Kumar K.V } 22040fc1b451SAneesh Kumar K.V 22050fc1b451SAneesh Kumar K.V /* indirect blocks */ 22060fc1b451SAneesh Kumar K.V meta_blocks = 1; 22070fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22080fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22090fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22100fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22110fc1b451SAneesh Kumar K.V 22120fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22130fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2214ac27a0ecSDave Kleikamp 2215ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2216ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2217ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2218ac27a0ecSDave Kleikamp res <<= bits; 2219ac27a0ecSDave Kleikamp if (res > upper_limit) 2220ac27a0ecSDave Kleikamp res = upper_limit; 22210fc1b451SAneesh Kumar K.V 22220fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 22230fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 22240fc1b451SAneesh Kumar K.V 2225ac27a0ecSDave Kleikamp return res; 2226ac27a0ecSDave Kleikamp } 2227ac27a0ecSDave Kleikamp 2228617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 222970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2230ac27a0ecSDave Kleikamp { 2231617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2232fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2233ac27a0ecSDave Kleikamp int has_super = 0; 2234ac27a0ecSDave Kleikamp 2235ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2236ac27a0ecSDave Kleikamp 2237617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2238ac27a0ecSDave Kleikamp nr < first_meta_bg) 223970bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2240ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2241617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2242ac27a0ecSDave Kleikamp has_super = 1; 22430b8e58a1SAndreas Dilger 2244617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2245ac27a0ecSDave Kleikamp } 2246ac27a0ecSDave Kleikamp 2247c9de560dSAlex Tomas /** 2248c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2249c9de560dSAlex Tomas * @sbi: In memory super block info 2250c9de560dSAlex Tomas * 2251c9de560dSAlex Tomas * If we have specified it via mount option, then 2252c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2253c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2254c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2255c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2256c9de560dSAlex Tomas * 2257c9de560dSAlex Tomas */ 2258c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2259c9de560dSAlex Tomas { 2260c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2261c9de560dSAlex Tomas unsigned long stripe_width = 2262c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2263c9de560dSAlex Tomas 2264c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2265c9de560dSAlex Tomas return sbi->s_stripe; 2266c9de560dSAlex Tomas 2267c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2268c9de560dSAlex Tomas return stripe_width; 2269c9de560dSAlex Tomas 2270c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2271c9de560dSAlex Tomas return stride; 2272c9de560dSAlex Tomas 2273c9de560dSAlex Tomas return 0; 2274c9de560dSAlex Tomas } 2275ac27a0ecSDave Kleikamp 22763197ebdbSTheodore Ts'o /* sysfs supprt */ 22773197ebdbSTheodore Ts'o 22783197ebdbSTheodore Ts'o struct ext4_attr { 22793197ebdbSTheodore Ts'o struct attribute attr; 22803197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 22813197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 22823197ebdbSTheodore Ts'o const char *, size_t); 22833197ebdbSTheodore Ts'o int offset; 22843197ebdbSTheodore Ts'o }; 22853197ebdbSTheodore Ts'o 22863197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 22873197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 22883197ebdbSTheodore Ts'o { 22893197ebdbSTheodore Ts'o char *endp; 22903197ebdbSTheodore Ts'o 2291e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2292e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 22933197ebdbSTheodore Ts'o if (*endp || *value > max) 22943197ebdbSTheodore Ts'o return -EINVAL; 22953197ebdbSTheodore Ts'o 22963197ebdbSTheodore Ts'o return 0; 22973197ebdbSTheodore Ts'o } 22983197ebdbSTheodore Ts'o 22993197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23013197ebdbSTheodore Ts'o char *buf) 23023197ebdbSTheodore Ts'o { 23033197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23043197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 23053197ebdbSTheodore Ts'o } 23063197ebdbSTheodore Ts'o 23073197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 23083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23093197ebdbSTheodore Ts'o { 23103197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23113197ebdbSTheodore Ts'o 2312f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2313f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23143197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 23153197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 23163197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 23173197ebdbSTheodore Ts'o } 23183197ebdbSTheodore Ts'o 23193197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 23203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23213197ebdbSTheodore Ts'o { 23223197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 23233197ebdbSTheodore Ts'o 2324f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2325f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 23263197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2327a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 23283197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2329a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 23303197ebdbSTheodore Ts'o } 23313197ebdbSTheodore Ts'o 23323197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 23333197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23343197ebdbSTheodore Ts'o const char *buf, size_t count) 23353197ebdbSTheodore Ts'o { 23363197ebdbSTheodore Ts'o unsigned long t; 23373197ebdbSTheodore Ts'o 23383197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 23393197ebdbSTheodore Ts'o return -EINVAL; 23403197ebdbSTheodore Ts'o 2341f7c43950STheodore Ts'o if (!is_power_of_2(t)) 23423197ebdbSTheodore Ts'o return -EINVAL; 23433197ebdbSTheodore Ts'o 23443197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 23453197ebdbSTheodore Ts'o return count; 23463197ebdbSTheodore Ts'o } 23473197ebdbSTheodore Ts'o 23483197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 23493197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 23503197ebdbSTheodore Ts'o { 23513197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23523197ebdbSTheodore Ts'o 23533197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 23543197ebdbSTheodore Ts'o } 23553197ebdbSTheodore Ts'o 23563197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 23573197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23583197ebdbSTheodore Ts'o const char *buf, size_t count) 23593197ebdbSTheodore Ts'o { 23603197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 23613197ebdbSTheodore Ts'o unsigned long t; 23623197ebdbSTheodore Ts'o 23633197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 23643197ebdbSTheodore Ts'o return -EINVAL; 23653197ebdbSTheodore Ts'o *ui = t; 23663197ebdbSTheodore Ts'o return count; 23673197ebdbSTheodore Ts'o } 23683197ebdbSTheodore Ts'o 23693197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 23703197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 23713197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 23723197ebdbSTheodore Ts'o .show = _show, \ 23733197ebdbSTheodore Ts'o .store = _store, \ 23743197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 23753197ebdbSTheodore Ts'o } 23763197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 23773197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 23783197ebdbSTheodore Ts'o 23793197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 23803197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 23813197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 23823197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 23833197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 23843197ebdbSTheodore Ts'o 23853197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 23863197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 23873197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 23883197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 23893197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 239011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 23913197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 23923197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 23933197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 23943197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 23953197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 23963197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 239755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 23983197ebdbSTheodore Ts'o 23993197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 24003197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 24013197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 24023197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 24033197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 240411013911SAndreas Dilger ATTR_LIST(inode_goal), 24053197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 24063197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 24073197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 24083197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 24093197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 24103197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 241155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 24123197ebdbSTheodore Ts'o NULL, 24133197ebdbSTheodore Ts'o }; 24143197ebdbSTheodore Ts'o 24153197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 24163197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 24173197ebdbSTheodore Ts'o { 24183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24193197ebdbSTheodore Ts'o s_kobj); 24203197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24213197ebdbSTheodore Ts'o 24223197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 24233197ebdbSTheodore Ts'o } 24243197ebdbSTheodore Ts'o 24253197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 24263197ebdbSTheodore Ts'o struct attribute *attr, 24273197ebdbSTheodore Ts'o const char *buf, size_t len) 24283197ebdbSTheodore Ts'o { 24293197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24303197ebdbSTheodore Ts'o s_kobj); 24313197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 24323197ebdbSTheodore Ts'o 24333197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 24343197ebdbSTheodore Ts'o } 24353197ebdbSTheodore Ts'o 24363197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 24373197ebdbSTheodore Ts'o { 24383197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 24393197ebdbSTheodore Ts'o s_kobj); 24403197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 24413197ebdbSTheodore Ts'o } 24423197ebdbSTheodore Ts'o 24433197ebdbSTheodore Ts'o 244452cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 24453197ebdbSTheodore Ts'o .show = ext4_attr_show, 24463197ebdbSTheodore Ts'o .store = ext4_attr_store, 24473197ebdbSTheodore Ts'o }; 24483197ebdbSTheodore Ts'o 24493197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 24503197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 24513197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 24523197ebdbSTheodore Ts'o .release = ext4_sb_release, 24533197ebdbSTheodore Ts'o }; 24543197ebdbSTheodore Ts'o 2455a13fb1a4SEric Sandeen /* 2456a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2457a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2458a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2459a13fb1a4SEric Sandeen * 0 if it cannot be. 2460a13fb1a4SEric Sandeen */ 2461a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2462a13fb1a4SEric Sandeen { 2463a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2464a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2465a13fb1a4SEric Sandeen "Couldn't mount because of " 2466a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2467a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2468a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2469a13fb1a4SEric Sandeen return 0; 2470a13fb1a4SEric Sandeen } 2471a13fb1a4SEric Sandeen 2472a13fb1a4SEric Sandeen if (readonly) 2473a13fb1a4SEric Sandeen return 1; 2474a13fb1a4SEric Sandeen 2475a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2476a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2477a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2478a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2479a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2480a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2481a13fb1a4SEric Sandeen return 0; 2482a13fb1a4SEric Sandeen } 2483a13fb1a4SEric Sandeen /* 2484a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2485a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2486a13fb1a4SEric Sandeen */ 2487a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2488a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2489a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2490a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2491a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2492a13fb1a4SEric Sandeen return 0; 2493a13fb1a4SEric Sandeen } 2494a13fb1a4SEric Sandeen } 2495a13fb1a4SEric Sandeen return 1; 2496a13fb1a4SEric Sandeen } 2497a13fb1a4SEric Sandeen 249866e61a9eSTheodore Ts'o /* 249966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 250066e61a9eSTheodore Ts'o * on the file system 250166e61a9eSTheodore Ts'o */ 250266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 250366e61a9eSTheodore Ts'o { 250466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 250566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 250666e61a9eSTheodore Ts'o struct ext4_super_block *es; 250766e61a9eSTheodore Ts'o 250866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 250966e61a9eSTheodore Ts'o es = sbi->s_es; 251066e61a9eSTheodore Ts'o 251166e61a9eSTheodore Ts'o if (es->s_error_count) 251266e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 251366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 251466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 251566e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 251666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 251766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 251866e61a9eSTheodore Ts'o es->s_first_error_func, 251966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 252066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 252166e61a9eSTheodore Ts'o printk(": inode %u", 252266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 252366e61a9eSTheodore Ts'o if (es->s_first_error_block) 252466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 252566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 252666e61a9eSTheodore Ts'o printk("\n"); 252766e61a9eSTheodore Ts'o } 252866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 252966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 253066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 253166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 253266e61a9eSTheodore Ts'o es->s_last_error_func, 253366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 253466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 253566e61a9eSTheodore Ts'o printk(": inode %u", 253666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 253766e61a9eSTheodore Ts'o if (es->s_last_error_block) 253866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 253966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 254066e61a9eSTheodore Ts'o printk("\n"); 254166e61a9eSTheodore Ts'o } 254266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 254366e61a9eSTheodore Ts'o } 254466e61a9eSTheodore Ts'o 2545617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 25467477827fSAneesh Kumar K.V __releases(kernel_lock) 25477477827fSAneesh Kumar K.V __acquires(kernel_lock) 2548ac27a0ecSDave Kleikamp { 2549d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 2550ac27a0ecSDave Kleikamp struct buffer_head *bh; 2551617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2552617ba13bSMingming Cao struct ext4_sb_info *sbi; 2553617ba13bSMingming Cao ext4_fsblk_t block; 2554617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 255570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2556ac27a0ecSDave Kleikamp unsigned long offset = 0; 2557ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2558ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2559ac27a0ecSDave Kleikamp struct inode *root; 25609f6200bbSTheodore Ts'o char *cp; 25610390131bSFrank Mayhar const char *descr; 2562dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 2563ac27a0ecSDave Kleikamp int blocksize; 25644ec11028STheodore Ts'o unsigned int db_count; 25654ec11028STheodore Ts'o unsigned int i; 2566f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 2567bd81d8eeSLaurent Vivier __u64 blocks_count; 2568833f4077SPeter Zijlstra int err; 2569b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2570ac27a0ecSDave Kleikamp 2571ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2572ac27a0ecSDave Kleikamp if (!sbi) 2573dcc7dae3SCyrill Gorcunov goto out_free_orig; 2574705895b6SPekka Enberg 2575705895b6SPekka Enberg sbi->s_blockgroup_lock = 2576705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2577705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2578705895b6SPekka Enberg kfree(sbi); 2579dcc7dae3SCyrill Gorcunov goto out_free_orig; 2580705895b6SPekka Enberg } 2581ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2582ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2583617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2584617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2585240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2586d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2587f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 2588f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 2589f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 2590ac27a0ecSDave Kleikamp 2591ac27a0ecSDave Kleikamp unlock_kernel(); 2592ac27a0ecSDave Kleikamp 25939f6200bbSTheodore Ts'o /* Cleanup superblock name */ 25949f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 25959f6200bbSTheodore Ts'o *cp = '!'; 25969f6200bbSTheodore Ts'o 2597dcc7dae3SCyrill Gorcunov ret = -EINVAL; 2598617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2599ac27a0ecSDave Kleikamp if (!blocksize) { 2600b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2601ac27a0ecSDave Kleikamp goto out_fail; 2602ac27a0ecSDave Kleikamp } 2603ac27a0ecSDave Kleikamp 2604ac27a0ecSDave Kleikamp /* 2605617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2606ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2607ac27a0ecSDave Kleikamp */ 2608617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 260970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 261070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2611ac27a0ecSDave Kleikamp } else { 261270bbb3e0SAndrew Morton logical_sb_block = sb_block; 2613ac27a0ecSDave Kleikamp } 2614ac27a0ecSDave Kleikamp 261570bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2616b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2617ac27a0ecSDave Kleikamp goto out_fail; 2618ac27a0ecSDave Kleikamp } 2619ac27a0ecSDave Kleikamp /* 2620ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2621617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2622ac27a0ecSDave Kleikamp */ 2623617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2624ac27a0ecSDave Kleikamp sbi->s_es = es; 2625ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2626617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2627617ba13bSMingming Cao goto cantfind_ext4; 2628afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2629ac27a0ecSDave Kleikamp 2630ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2631ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2632617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2633ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2634437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 2635437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 2636437ca0fdSDmitry Monakhov "2.6.38"); 2637ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2638437ca0fdSDmitry Monakhov } 2639617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2640ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 264103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2642617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2643ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 26442e7842b8SHugh Dickins #endif 264503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2646617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2647ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 26482e7842b8SHugh Dickins #endif 2649617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2650482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2651617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2652482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, ORDERED_DATA); 2653617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2654482a7425SDmitry Monakhov set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 2655ac27a0ecSDave Kleikamp 2656617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2657ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2658bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2659ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2660bb4f397aSAneesh Kumar K.V else 2661bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 26628b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 26638b67f04aSTheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 26648b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 26658b67f04aSTheodore Ts'o set_opt(sbi->s_mount_opt, DISCARD); 2666ac27a0ecSDave Kleikamp 2667ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2668ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 266930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 267030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 267130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2672ac27a0ecSDave Kleikamp 26738b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 2674571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2675ac27a0ecSDave Kleikamp 26761e2462f9SMingming Cao /* 2677dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2678dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2679dd919b98SAneesh Kumar K.V */ 26808b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 26818b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 2682dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2683dd919b98SAneesh Kumar K.V 26848b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 26858b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 26868b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 26878b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 26888b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 26898b67f04aSTheodore Ts'o } 2690b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2691b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2692ac27a0ecSDave Kleikamp goto failed_mount; 2693ac27a0ecSDave Kleikamp 2694ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2695482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 2696ac27a0ecSDave Kleikamp 2697617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2698617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2699617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2700617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2701b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2702b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2703b31e1552SEric Sandeen "running e2fsck is recommended"); 2704469108ffSTheodore Tso 2705469108ffSTheodore Tso /* 2706ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2707ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2708ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2709ac27a0ecSDave Kleikamp */ 2710a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 2711ac27a0ecSDave Kleikamp goto failed_mount; 2712a13fb1a4SEric Sandeen 2713ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2714ac27a0ecSDave Kleikamp 2715617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2716617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2718b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2719ac27a0ecSDave Kleikamp goto failed_mount; 2720ac27a0ecSDave Kleikamp } 2721ac27a0ecSDave Kleikamp 2722ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2723ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2724ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2725b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2726ce40733cSAneesh Kumar K.V blocksize); 2727ac27a0ecSDave Kleikamp goto failed_mount; 2728ac27a0ecSDave Kleikamp } 2729ac27a0ecSDave Kleikamp 2730ac27a0ecSDave Kleikamp brelse(bh); 273170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 273270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 273370bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2734ac27a0ecSDave Kleikamp if (!bh) { 2735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2736b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2737ac27a0ecSDave Kleikamp goto failed_mount; 2738ac27a0ecSDave Kleikamp } 2739617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2740ac27a0ecSDave Kleikamp sbi->s_es = es; 2741617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2743b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2744ac27a0ecSDave Kleikamp goto failed_mount; 2745ac27a0ecSDave Kleikamp } 2746ac27a0ecSDave Kleikamp } 2747ac27a0ecSDave Kleikamp 2748a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2749a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2750f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2751f287a1a5STheodore Ts'o has_huge_files); 2752f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2753ac27a0ecSDave Kleikamp 2754617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2755617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2756617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2757ac27a0ecSDave Kleikamp } else { 2758ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2759ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2760617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 27611330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2762ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2763b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2764b31e1552SEric Sandeen "unsupported inode size: %d", 2765ac27a0ecSDave Kleikamp sbi->s_inode_size); 2766ac27a0ecSDave Kleikamp goto failed_mount; 2767ac27a0ecSDave Kleikamp } 2768ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2769ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2770ac27a0ecSDave Kleikamp } 27710b8e58a1SAndreas Dilger 27720d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 27730d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 27748fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 27750d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2776d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2777b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2778b31e1552SEric Sandeen "unsupported descriptor size %lu", 27790d1ee42fSAlexandre Ratchov sbi->s_desc_size); 27800d1ee42fSAlexandre Ratchov goto failed_mount; 27810d1ee42fSAlexandre Ratchov } 27820d1ee42fSAlexandre Ratchov } else 27830d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 27840b8e58a1SAndreas Dilger 2785ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2786ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2787b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2788617ba13bSMingming Cao goto cantfind_ext4; 27890b8e58a1SAndreas Dilger 2790617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2791ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2792617ba13bSMingming Cao goto cantfind_ext4; 2793ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2794ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 27950d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2796ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2797ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2798e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2799e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 28000b8e58a1SAndreas Dilger 2801ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2802ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2803ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2804f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2805f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2806f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2807f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2808f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2809f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2810f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2811f99b2589STheodore Ts'o #else 2812f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2813f99b2589STheodore Ts'o #endif 2814f99b2589STheodore Ts'o sb->s_dirt = 1; 2815f99b2589STheodore Ts'o } 2816ac27a0ecSDave Kleikamp 2817ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2818b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2819b31e1552SEric Sandeen "#blocks per group too big: %lu", 2820ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2821ac27a0ecSDave Kleikamp goto failed_mount; 2822ac27a0ecSDave Kleikamp } 2823ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2824b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2825b31e1552SEric Sandeen "#inodes per group too big: %lu", 2826ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2827ac27a0ecSDave Kleikamp goto failed_mount; 2828ac27a0ecSDave Kleikamp } 2829ac27a0ecSDave Kleikamp 2830bf43d84bSEric Sandeen /* 2831bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 2832bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 2833bf43d84bSEric Sandeen */ 2834bf43d84bSEric Sandeen if ((ext4_blocks_count(es) > 2835bf43d84bSEric Sandeen (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) || 2836bf43d84bSEric Sandeen (ext4_blocks_count(es) > 2837bf43d84bSEric Sandeen (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - sb->s_blocksize_bits))) { 2838b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2839bf43d84bSEric Sandeen " too large to mount safely on this system"); 2840ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 284190c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2842bf43d84bSEric Sandeen ret = -EFBIG; 2843ac27a0ecSDave Kleikamp goto failed_mount; 2844ac27a0ecSDave Kleikamp } 2845ac27a0ecSDave Kleikamp 2846617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2847617ba13bSMingming Cao goto cantfind_ext4; 2848e7c95593SEric Sandeen 28490f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 28500f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 28510f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2852b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2853b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 28540f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 28550f2ddca6SFrom: Thiemo Nagel goto failed_mount; 28560f2ddca6SFrom: Thiemo Nagel } 28570f2ddca6SFrom: Thiemo Nagel 28584ec11028STheodore Ts'o /* 28594ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 28604ec11028STheodore Ts'o * of the filesystem. 28614ec11028STheodore Ts'o */ 28624ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2863b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2864b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2865e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 28664ec11028STheodore Ts'o ext4_blocks_count(es)); 2867e7c95593SEric Sandeen goto failed_mount; 2868e7c95593SEric Sandeen } 2869bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2870bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2871bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2872bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 28734ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2874b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 28754ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2876b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 28774ec11028STheodore Ts'o ext4_blocks_count(es), 28784ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 28794ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 28804ec11028STheodore Ts'o goto failed_mount; 28814ec11028STheodore Ts'o } 2882bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2883fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 2884fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 2885617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2886617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2887ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2888ac27a0ecSDave Kleikamp GFP_KERNEL); 2889ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2890b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2891ac27a0ecSDave Kleikamp goto failed_mount; 2892ac27a0ecSDave Kleikamp } 2893ac27a0ecSDave Kleikamp 28943244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 28959f6200bbSTheodore Ts'o if (ext4_proc_root) 28969f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 28973244fcb1SAlexander Beregalov #endif 2898240799cdSTheodore Ts'o 2899705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2900ac27a0ecSDave Kleikamp 2901ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 290270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2903ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2904ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2905b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2906b31e1552SEric Sandeen "can't read group descriptor %d", i); 2907ac27a0ecSDave Kleikamp db_count = i; 2908ac27a0ecSDave Kleikamp goto failed_mount2; 2909ac27a0ecSDave Kleikamp } 2910ac27a0ecSDave Kleikamp } 2911617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2912b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2913ac27a0ecSDave Kleikamp goto failed_mount2; 2914ac27a0ecSDave Kleikamp } 2915772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2916772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2917b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2918b31e1552SEric Sandeen "unable to initialize " 2919b31e1552SEric Sandeen "flex_bg meta info!"); 2920772cb7c8SJose R. Santos goto failed_mount2; 2921772cb7c8SJose R. Santos } 2922772cb7c8SJose R. Santos 2923ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2924ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2925ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2926ac27a0ecSDave Kleikamp 2927c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 292855138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 2929c9de560dSAlex Tomas 2930ac27a0ecSDave Kleikamp /* 2931ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2932ac27a0ecSDave Kleikamp */ 29339ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 29349ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2935617ba13bSMingming Cao sb->s_op = &ext4_sops; 29369ca92389STheodore Ts'o else 29379ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2938617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2939617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2940ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2941617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2942617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2943ac27a0ecSDave Kleikamp #endif 2944ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 29453b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 294632ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2947ac27a0ecSDave Kleikamp 2948ac27a0ecSDave Kleikamp sb->s_root = NULL; 2949ac27a0ecSDave Kleikamp 2950ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2951617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2952617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2953ac27a0ecSDave Kleikamp 2954ac27a0ecSDave Kleikamp /* 2955ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2956ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2957ac27a0ecSDave Kleikamp */ 2958ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2959617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2960617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2961ac27a0ecSDave Kleikamp goto failed_mount3; 29620390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 29630390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2964b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2965b31e1552SEric Sandeen "suppressed and not mounted read-only"); 2966744692dcSJiaying Zhang goto failed_mount_wq; 2967ac27a0ecSDave Kleikamp } else { 29680390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 29690390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 29700390131bSFrank Mayhar sbi->s_journal = NULL; 29710390131bSFrank Mayhar needs_recovery = 0; 29720390131bSFrank Mayhar goto no_journal; 2973ac27a0ecSDave Kleikamp } 2974ac27a0ecSDave Kleikamp 2975eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2976eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2977eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2978b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2979744692dcSJiaying Zhang goto failed_mount_wq; 2980eb40a09cSJose R. Santos } 2981eb40a09cSJose R. Santos 2982d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2983d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 2984d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2985d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2986d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2987818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2988818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2989818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2990818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2991d4da6c9cSLinus Torvalds } else { 2992d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 2993d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2994d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2995d4da6c9cSLinus Torvalds } 2996818d276cSGirish Shilamkar 2997ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2998ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2999ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3000ac27a0ecSDave Kleikamp case 0: 3001ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 300263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 300363f57933SAndrew Morton * cope, else JOURNAL_DATA 300463f57933SAndrew Morton */ 3005dab291afSMingming Cao if (jbd2_journal_check_available_features 3006dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3007ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 3008ac27a0ecSDave Kleikamp else 3009ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 3010ac27a0ecSDave Kleikamp break; 3011ac27a0ecSDave Kleikamp 3012617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3013617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3014dab291afSMingming Cao if (!jbd2_journal_check_available_features 3015dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3016b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3017b31e1552SEric Sandeen "requested data journaling mode"); 3018744692dcSJiaying Zhang goto failed_mount_wq; 3019ac27a0ecSDave Kleikamp } 3020ac27a0ecSDave Kleikamp default: 3021ac27a0ecSDave Kleikamp break; 3022ac27a0ecSDave Kleikamp } 3023b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3024ac27a0ecSDave Kleikamp 30250390131bSFrank Mayhar no_journal: 302684061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeblocks_counter, 302784061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 302884061e07SDmitry Monakhov if (!err) 302984061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_freeinodes_counter, 303084061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 303184061e07SDmitry Monakhov if (!err) 303284061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirs_counter, 303384061e07SDmitry Monakhov ext4_count_dirs(sb)); 303484061e07SDmitry Monakhov if (!err) 303584061e07SDmitry Monakhov err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 303684061e07SDmitry Monakhov if (err) { 303784061e07SDmitry Monakhov ext4_msg(sb, KERN_ERR, "insufficient memory"); 303884061e07SDmitry Monakhov goto failed_mount_wq; 303984061e07SDmitry Monakhov } 3040206f7ab4SChristoph Hellwig 30414c0425ffSMingming Cao EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); 30424c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 30434c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 30444c0425ffSMingming Cao goto failed_mount_wq; 30454c0425ffSMingming Cao } 30464c0425ffSMingming Cao 3047ac27a0ecSDave Kleikamp /* 3048dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3049ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3050ac27a0ecSDave Kleikamp */ 3051ac27a0ecSDave Kleikamp 30521d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 30531d1fe1eeSDavid Howells if (IS_ERR(root)) { 3054b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 30551d1fe1eeSDavid Howells ret = PTR_ERR(root); 3056ac27a0ecSDave Kleikamp goto failed_mount4; 3057ac27a0ecSDave Kleikamp } 3058ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 30591d1fe1eeSDavid Howells iput(root); 3060b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3061ac27a0ecSDave Kleikamp goto failed_mount4; 3062ac27a0ecSDave Kleikamp } 30631d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 30641d1fe1eeSDavid Howells if (!sb->s_root) { 3065b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 30661d1fe1eeSDavid Howells iput(root); 30671d1fe1eeSDavid Howells ret = -ENOMEM; 30681d1fe1eeSDavid Howells goto failed_mount4; 30691d1fe1eeSDavid Howells } 3070ac27a0ecSDave Kleikamp 3071617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3072ef7f3835SKalpak Shah 3073ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3074ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3075ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3076ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3077ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3078ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3079ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3080ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3081ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3082ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3083ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3084ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3085ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3086ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3087ef7f3835SKalpak Shah } 3088ef7f3835SKalpak Shah } 3089ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3090ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3091ef7f3835SKalpak Shah sbi->s_inode_size) { 3092ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3093ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3094b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3095b31e1552SEric Sandeen "available"); 3096ef7f3835SKalpak Shah } 3097ef7f3835SKalpak Shah 309890576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 309990576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3100b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3101b31e1552SEric Sandeen "requested data journaling mode"); 3102c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 310390576c0bSTheodore Ts'o } 3104744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3105744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3106744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3107744692dcSJiaying Zhang "option - requested data journaling mode"); 3108744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3109744692dcSJiaying Zhang } 3110744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3111744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3112744692dcSJiaying Zhang "option - block size is too small"); 3113744692dcSJiaying Zhang clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); 3114744692dcSJiaying Zhang } 3115744692dcSJiaying Zhang } 3116c2774d84SAneesh Kumar K.V 31176fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 31186fd058f7STheodore Ts'o if (err) { 3119b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3120fbe845ddSCurt Wohlgemuth "zone (%d)", err); 31216fd058f7STheodore Ts'o goto failed_mount4; 31226fd058f7STheodore Ts'o } 31236fd058f7STheodore Ts'o 3124c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3125c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3126c2774d84SAneesh Kumar K.V if (err) { 3127b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 3128c2774d84SAneesh Kumar K.V err); 3129c2774d84SAneesh Kumar K.V goto failed_mount4; 3130c2774d84SAneesh Kumar K.V } 3131c2774d84SAneesh Kumar K.V 31323197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 31333197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 31343197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 31353197ebdbSTheodore Ts'o "%s", sb->s_id); 31363197ebdbSTheodore Ts'o if (err) { 31373197ebdbSTheodore Ts'o ext4_mb_release(sb); 31383197ebdbSTheodore Ts'o ext4_ext_release(sb); 31393197ebdbSTheodore Ts'o goto failed_mount4; 31403197ebdbSTheodore Ts'o }; 31413197ebdbSTheodore Ts'o 3142617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3143617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3144617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 31450390131bSFrank Mayhar if (needs_recovery) { 3146b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3147617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 31480390131bSFrank Mayhar } 31490390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 31500390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 31510390131bSFrank Mayhar descr = " journalled data mode"; 31520390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 31530390131bSFrank Mayhar descr = " ordered data mode"; 31540390131bSFrank Mayhar else 31550390131bSFrank Mayhar descr = " writeback data mode"; 31560390131bSFrank Mayhar } else 31570390131bSFrank Mayhar descr = "out journal"; 31580390131bSFrank Mayhar 3159d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 31608b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 31618b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3162ac27a0ecSDave Kleikamp 316366e61a9eSTheodore Ts'o init_timer(&sbi->s_err_report); 316466e61a9eSTheodore Ts'o sbi->s_err_report.function = print_daily_error_info; 316566e61a9eSTheodore Ts'o sbi->s_err_report.data = (unsigned long) sb; 316666e61a9eSTheodore Ts'o if (es->s_error_count) 316766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 316866e61a9eSTheodore Ts'o 3169ac27a0ecSDave Kleikamp lock_kernel(); 3170d4c402d9SCurt Wohlgemuth kfree(orig_data); 3171ac27a0ecSDave Kleikamp return 0; 3172ac27a0ecSDave Kleikamp 3173617ba13bSMingming Cao cantfind_ext4: 3174ac27a0ecSDave Kleikamp if (!silent) 3175b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3176ac27a0ecSDave Kleikamp goto failed_mount; 3177ac27a0ecSDave Kleikamp 3178ac27a0ecSDave Kleikamp failed_mount4: 3179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 31804c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 31814c0425ffSMingming Cao failed_mount_wq: 31826fd058f7STheodore Ts'o ext4_release_system_zone(sb); 31830390131bSFrank Mayhar if (sbi->s_journal) { 3184dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 318547b4a50bSJan Kara sbi->s_journal = NULL; 31860390131bSFrank Mayhar } 318784061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeblocks_counter); 318884061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_freeinodes_counter); 318984061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirs_counter); 319084061e07SDmitry Monakhov percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3191ac27a0ecSDave Kleikamp failed_mount3: 3192c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3193c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3194c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3195c5ca7c76STheodore Ts'o else 3196c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3197c5ca7c76STheodore Ts'o } 3198ac27a0ecSDave Kleikamp failed_mount2: 3199ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3200ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3201ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3202ac27a0ecSDave Kleikamp failed_mount: 3203240799cdSTheodore Ts'o if (sbi->s_proc) { 32049f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3205240799cdSTheodore Ts'o } 3206ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3207ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3208ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3209ac27a0ecSDave Kleikamp #endif 3210617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3211ac27a0ecSDave Kleikamp brelse(bh); 3212ac27a0ecSDave Kleikamp out_fail: 3213ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3214f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3215ac27a0ecSDave Kleikamp kfree(sbi); 3216ac27a0ecSDave Kleikamp lock_kernel(); 3217dcc7dae3SCyrill Gorcunov out_free_orig: 3218d4c402d9SCurt Wohlgemuth kfree(orig_data); 32191d1fe1eeSDavid Howells return ret; 3220ac27a0ecSDave Kleikamp } 3221ac27a0ecSDave Kleikamp 3222ac27a0ecSDave Kleikamp /* 3223ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3224ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3225ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3226ac27a0ecSDave Kleikamp */ 3227617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3228ac27a0ecSDave Kleikamp { 3229617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3230ac27a0ecSDave Kleikamp 3231ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 323230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 323330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3234ac27a0ecSDave Kleikamp 3235*a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3236ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3237dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3238ac27a0ecSDave Kleikamp else 3239dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 32405bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 32415bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 32425bf5683aSHidehiro Kawai else 32435bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3244*a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3245ac27a0ecSDave Kleikamp } 3246ac27a0ecSDave Kleikamp 3247617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3248ac27a0ecSDave Kleikamp unsigned int journal_inum) 3249ac27a0ecSDave Kleikamp { 3250ac27a0ecSDave Kleikamp struct inode *journal_inode; 3251ac27a0ecSDave Kleikamp journal_t *journal; 3252ac27a0ecSDave Kleikamp 32530390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32540390131bSFrank Mayhar 3255ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3256ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3257ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3258ac27a0ecSDave Kleikamp 32591d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 32601d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3261b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3262ac27a0ecSDave Kleikamp return NULL; 3263ac27a0ecSDave Kleikamp } 3264ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3265ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3266ac27a0ecSDave Kleikamp iput(journal_inode); 3267b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3268ac27a0ecSDave Kleikamp return NULL; 3269ac27a0ecSDave Kleikamp } 3270ac27a0ecSDave Kleikamp 3271e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3272ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 32731d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3274b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3275ac27a0ecSDave Kleikamp iput(journal_inode); 3276ac27a0ecSDave Kleikamp return NULL; 3277ac27a0ecSDave Kleikamp } 3278ac27a0ecSDave Kleikamp 3279dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3280ac27a0ecSDave Kleikamp if (!journal) { 3281b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3282ac27a0ecSDave Kleikamp iput(journal_inode); 3283ac27a0ecSDave Kleikamp return NULL; 3284ac27a0ecSDave Kleikamp } 3285ac27a0ecSDave Kleikamp journal->j_private = sb; 3286617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3287ac27a0ecSDave Kleikamp return journal; 3288ac27a0ecSDave Kleikamp } 3289ac27a0ecSDave Kleikamp 3290617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3291ac27a0ecSDave Kleikamp dev_t j_dev) 3292ac27a0ecSDave Kleikamp { 3293ac27a0ecSDave Kleikamp struct buffer_head *bh; 3294ac27a0ecSDave Kleikamp journal_t *journal; 3295617ba13bSMingming Cao ext4_fsblk_t start; 3296617ba13bSMingming Cao ext4_fsblk_t len; 3297ac27a0ecSDave Kleikamp int hblock, blocksize; 3298617ba13bSMingming Cao ext4_fsblk_t sb_block; 3299ac27a0ecSDave Kleikamp unsigned long offset; 3300617ba13bSMingming Cao struct ext4_super_block *es; 3301ac27a0ecSDave Kleikamp struct block_device *bdev; 3302ac27a0ecSDave Kleikamp 33030390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 33040390131bSFrank Mayhar 3305b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3306ac27a0ecSDave Kleikamp if (bdev == NULL) 3307ac27a0ecSDave Kleikamp return NULL; 3308ac27a0ecSDave Kleikamp 3309ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3310b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3311b31e1552SEric Sandeen "failed to claim external journal device"); 33129a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3313ac27a0ecSDave Kleikamp return NULL; 3314ac27a0ecSDave Kleikamp } 3315ac27a0ecSDave Kleikamp 3316ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3317e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3318ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3319b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3320b31e1552SEric Sandeen "blocksize too small for journal device"); 3321ac27a0ecSDave Kleikamp goto out_bdev; 3322ac27a0ecSDave Kleikamp } 3323ac27a0ecSDave Kleikamp 3324617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3325617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3326ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3327ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3328b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3329b31e1552SEric Sandeen "external journal"); 3330ac27a0ecSDave Kleikamp goto out_bdev; 3331ac27a0ecSDave Kleikamp } 3332ac27a0ecSDave Kleikamp 3333617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3334617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3335ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3336617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3338b31e1552SEric Sandeen "bad superblock"); 3339ac27a0ecSDave Kleikamp brelse(bh); 3340ac27a0ecSDave Kleikamp goto out_bdev; 3341ac27a0ecSDave Kleikamp } 3342ac27a0ecSDave Kleikamp 3343617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3344b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3345ac27a0ecSDave Kleikamp brelse(bh); 3346ac27a0ecSDave Kleikamp goto out_bdev; 3347ac27a0ecSDave Kleikamp } 3348ac27a0ecSDave Kleikamp 3349bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3350ac27a0ecSDave Kleikamp start = sb_block + 1; 3351ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3352ac27a0ecSDave Kleikamp 3353dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3354ac27a0ecSDave Kleikamp start, len, blocksize); 3355ac27a0ecSDave Kleikamp if (!journal) { 3356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3357ac27a0ecSDave Kleikamp goto out_bdev; 3358ac27a0ecSDave Kleikamp } 3359ac27a0ecSDave Kleikamp journal->j_private = sb; 3360ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3361ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3362ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3363b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3364ac27a0ecSDave Kleikamp goto out_journal; 3365ac27a0ecSDave Kleikamp } 3366ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3367b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3368b31e1552SEric Sandeen "user (unsupported) - %d", 3369ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3370ac27a0ecSDave Kleikamp goto out_journal; 3371ac27a0ecSDave Kleikamp } 3372617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3373617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3374ac27a0ecSDave Kleikamp return journal; 33750b8e58a1SAndreas Dilger 3376ac27a0ecSDave Kleikamp out_journal: 3377dab291afSMingming Cao jbd2_journal_destroy(journal); 3378ac27a0ecSDave Kleikamp out_bdev: 3379617ba13bSMingming Cao ext4_blkdev_put(bdev); 3380ac27a0ecSDave Kleikamp return NULL; 3381ac27a0ecSDave Kleikamp } 3382ac27a0ecSDave Kleikamp 3383617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3384617ba13bSMingming Cao struct ext4_super_block *es, 3385ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3386ac27a0ecSDave Kleikamp { 3387ac27a0ecSDave Kleikamp journal_t *journal; 3388ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3389ac27a0ecSDave Kleikamp dev_t journal_dev; 3390ac27a0ecSDave Kleikamp int err = 0; 3391ac27a0ecSDave Kleikamp int really_read_only; 3392ac27a0ecSDave Kleikamp 33930390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 33940390131bSFrank Mayhar 3395ac27a0ecSDave Kleikamp if (journal_devnum && 3396ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3397b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3398b31e1552SEric Sandeen "numbers have changed"); 3399ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3400ac27a0ecSDave Kleikamp } else 3401ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3402ac27a0ecSDave Kleikamp 3403ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3404ac27a0ecSDave Kleikamp 3405ac27a0ecSDave Kleikamp /* 3406ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3407ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3408ac27a0ecSDave Kleikamp * can get read-write access to the device. 3409ac27a0ecSDave Kleikamp */ 3410617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3411ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3412b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3413b31e1552SEric Sandeen "required on readonly filesystem"); 3414ac27a0ecSDave Kleikamp if (really_read_only) { 3415b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3416b31e1552SEric Sandeen "unavailable, cannot proceed"); 3417ac27a0ecSDave Kleikamp return -EROFS; 3418ac27a0ecSDave Kleikamp } 3419b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3420b31e1552SEric Sandeen "be enabled during recovery"); 3421ac27a0ecSDave Kleikamp } 3422ac27a0ecSDave Kleikamp } 3423ac27a0ecSDave Kleikamp 3424ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3426b31e1552SEric Sandeen "and inode journals!"); 3427ac27a0ecSDave Kleikamp return -EINVAL; 3428ac27a0ecSDave Kleikamp } 3429ac27a0ecSDave Kleikamp 3430ac27a0ecSDave Kleikamp if (journal_inum) { 3431617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3432ac27a0ecSDave Kleikamp return -EINVAL; 3433ac27a0ecSDave Kleikamp } else { 3434617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3435ac27a0ecSDave Kleikamp return -EINVAL; 3436ac27a0ecSDave Kleikamp } 3437ac27a0ecSDave Kleikamp 343890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3439b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 34404776004fSTheodore Ts'o 3441ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3442dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3443ac27a0ecSDave Kleikamp if (err) { 3444b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3445dab291afSMingming Cao jbd2_journal_destroy(journal); 3446ac27a0ecSDave Kleikamp return err; 3447ac27a0ecSDave Kleikamp } 3448ac27a0ecSDave Kleikamp } 3449ac27a0ecSDave Kleikamp 3450617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3451dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 34521c13d5c0STheodore Ts'o if (!err) { 34531c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 34541c13d5c0STheodore Ts'o if (save) 34551c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 34561c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3457dab291afSMingming Cao err = jbd2_journal_load(journal); 34581c13d5c0STheodore Ts'o if (save) 34591c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 34601c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 34611c13d5c0STheodore Ts'o kfree(save); 34621c13d5c0STheodore Ts'o } 3463ac27a0ecSDave Kleikamp 3464ac27a0ecSDave Kleikamp if (err) { 3465b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3466dab291afSMingming Cao jbd2_journal_destroy(journal); 3467ac27a0ecSDave Kleikamp return err; 3468ac27a0ecSDave Kleikamp } 3469ac27a0ecSDave Kleikamp 3470617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3471617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3472ac27a0ecSDave Kleikamp 3473ac27a0ecSDave Kleikamp if (journal_devnum && 3474ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3475ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3476ac27a0ecSDave Kleikamp 3477ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3478e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3479ac27a0ecSDave Kleikamp } 3480ac27a0ecSDave Kleikamp 3481ac27a0ecSDave Kleikamp return 0; 3482ac27a0ecSDave Kleikamp } 3483ac27a0ecSDave Kleikamp 3484e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3485ac27a0ecSDave Kleikamp { 3486e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3487617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3488c4be0c1dSTakashi Sato int error = 0; 3489ac27a0ecSDave Kleikamp 3490ac27a0ecSDave Kleikamp if (!sbh) 3491c4be0c1dSTakashi Sato return error; 3492914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3493914258bfSTheodore Ts'o /* 3494914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3495914258bfSTheodore Ts'o * superblock failed. This could happen because the 3496914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3497914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3498914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3499914258bfSTheodore Ts'o * write and hope for the best. 3500914258bfSTheodore Ts'o */ 3501b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3502b31e1552SEric Sandeen "superblock detected"); 3503914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3504914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3505914258bfSTheodore Ts'o } 350671290b36STheodore Ts'o /* 350771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 350871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 350971290b36STheodore Ts'o * write time when we are mounting the root file system 351071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 351171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 351271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 351371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 351471290b36STheodore Ts'o * to complain and force a full file system check. 351571290b36STheodore Ts'o */ 351671290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 3517ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3518f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3519afc32f7eSTheodore Ts'o es->s_kbytes_written = 3520afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3521afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3522afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 3523f613dfcbSTheodore Ts'o else 3524f613dfcbSTheodore Ts'o es->s_kbytes_written = 3525f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 35265d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 35275d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 35285d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 35295d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 35307234ab2aSTheodore Ts'o sb->s_dirt = 0; 3531ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3532ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3533914258bfSTheodore Ts'o if (sync) { 3534c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3535c4be0c1dSTakashi Sato if (error) 3536c4be0c1dSTakashi Sato return error; 3537c4be0c1dSTakashi Sato 3538c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3539c4be0c1dSTakashi Sato if (error) { 3540b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3541b31e1552SEric Sandeen "superblock"); 3542914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3543914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3544914258bfSTheodore Ts'o } 3545914258bfSTheodore Ts'o } 3546c4be0c1dSTakashi Sato return error; 3547ac27a0ecSDave Kleikamp } 3548ac27a0ecSDave Kleikamp 3549ac27a0ecSDave Kleikamp /* 3550ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3551ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3552ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3553ac27a0ecSDave Kleikamp */ 3554617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3555617ba13bSMingming Cao struct ext4_super_block *es) 3556ac27a0ecSDave Kleikamp { 3557617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3558ac27a0ecSDave Kleikamp 35590390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 35600390131bSFrank Mayhar BUG_ON(journal != NULL); 35610390131bSFrank Mayhar return; 35620390131bSFrank Mayhar } 3563dab291afSMingming Cao jbd2_journal_lock_updates(journal); 35647ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 35657ffe1ea8SHidehiro Kawai goto out; 35667ffe1ea8SHidehiro Kawai 3567617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3568ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3569617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3570e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3571ac27a0ecSDave Kleikamp } 35727ffe1ea8SHidehiro Kawai 35737ffe1ea8SHidehiro Kawai out: 3574dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3575ac27a0ecSDave Kleikamp } 3576ac27a0ecSDave Kleikamp 3577ac27a0ecSDave Kleikamp /* 3578ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3579ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3580ac27a0ecSDave Kleikamp * main filesystem now. 3581ac27a0ecSDave Kleikamp */ 3582617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3583617ba13bSMingming Cao struct ext4_super_block *es) 3584ac27a0ecSDave Kleikamp { 3585ac27a0ecSDave Kleikamp journal_t *journal; 3586ac27a0ecSDave Kleikamp int j_errno; 3587ac27a0ecSDave Kleikamp const char *errstr; 3588ac27a0ecSDave Kleikamp 35890390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 35900390131bSFrank Mayhar 3591617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3592ac27a0ecSDave Kleikamp 3593ac27a0ecSDave Kleikamp /* 3594ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3595617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3596ac27a0ecSDave Kleikamp */ 3597ac27a0ecSDave Kleikamp 3598dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3599ac27a0ecSDave Kleikamp if (j_errno) { 3600ac27a0ecSDave Kleikamp char nbuf[16]; 3601ac27a0ecSDave Kleikamp 3602617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 360312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 3604ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 360512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 3606ac27a0ecSDave Kleikamp 3607617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3608617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3609e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3610ac27a0ecSDave Kleikamp 3611dab291afSMingming Cao jbd2_journal_clear_err(journal); 3612ac27a0ecSDave Kleikamp } 3613ac27a0ecSDave Kleikamp } 3614ac27a0ecSDave Kleikamp 3615ac27a0ecSDave Kleikamp /* 3616ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3617ac27a0ecSDave Kleikamp * and wait on the commit. 3618ac27a0ecSDave Kleikamp */ 3619617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3620ac27a0ecSDave Kleikamp { 3621ac27a0ecSDave Kleikamp journal_t *journal; 36220390131bSFrank Mayhar int ret = 0; 3623ac27a0ecSDave Kleikamp 3624ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3625ac27a0ecSDave Kleikamp return 0; 3626ac27a0ecSDave Kleikamp 3627617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 36286b0310fbSEric Sandeen if (journal) { 3629437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 3630617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 36316b0310fbSEric Sandeen } 36320390131bSFrank Mayhar 3633ac27a0ecSDave Kleikamp return ret; 3634ac27a0ecSDave Kleikamp } 3635ac27a0ecSDave Kleikamp 3636617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3637ac27a0ecSDave Kleikamp { 3638ebc1ac16SChristoph Hellwig lock_super(sb); 3639e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3640ebc1ac16SChristoph Hellwig unlock_super(sb); 36410390131bSFrank Mayhar } 3642ac27a0ecSDave Kleikamp 3643617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3644ac27a0ecSDave Kleikamp { 364514ce0cb4STheodore Ts'o int ret = 0; 36469eddacf9SJan Kara tid_t target; 36478d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3648ac27a0ecSDave Kleikamp 36499bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 36508d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 36518d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 3652ac27a0ecSDave Kleikamp if (wait) 36538d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 36540390131bSFrank Mayhar } 365514ce0cb4STheodore Ts'o return ret; 3656ac27a0ecSDave Kleikamp } 3657ac27a0ecSDave Kleikamp 3658ac27a0ecSDave Kleikamp /* 3659ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3660ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3661ac27a0ecSDave Kleikamp */ 3662c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3663ac27a0ecSDave Kleikamp { 3664c4be0c1dSTakashi Sato int error = 0; 3665c4be0c1dSTakashi Sato journal_t *journal; 3666ac27a0ecSDave Kleikamp 36679ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 36689ca92389STheodore Ts'o return 0; 36699ca92389STheodore Ts'o 3670c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3671ac27a0ecSDave Kleikamp 3672ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3673dab291afSMingming Cao jbd2_journal_lock_updates(journal); 36747ffe1ea8SHidehiro Kawai 36757ffe1ea8SHidehiro Kawai /* 36769ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 36779ca92389STheodore Ts'o * the journal. 36787ffe1ea8SHidehiro Kawai */ 3679c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 36806b0310fbSEric Sandeen if (error < 0) 36816b0310fbSEric Sandeen goto out; 3682ac27a0ecSDave Kleikamp 3683ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3684617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3685e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 36866b0310fbSEric Sandeen out: 36876b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 36886b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 36896b0310fbSEric Sandeen return error; 3690ac27a0ecSDave Kleikamp } 3691ac27a0ecSDave Kleikamp 3692ac27a0ecSDave Kleikamp /* 3693ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3694ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3695ac27a0ecSDave Kleikamp */ 3696c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3697ac27a0ecSDave Kleikamp { 36989ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 36999ca92389STheodore Ts'o return 0; 37009ca92389STheodore Ts'o 3701ac27a0ecSDave Kleikamp lock_super(sb); 37029ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3703617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3704e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3705ac27a0ecSDave Kleikamp unlock_super(sb); 3706c4be0c1dSTakashi Sato return 0; 3707ac27a0ecSDave Kleikamp } 3708ac27a0ecSDave Kleikamp 3709617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3710ac27a0ecSDave Kleikamp { 3711617ba13bSMingming Cao struct ext4_super_block *es; 3712617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3713617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3714ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3715617ba13bSMingming Cao struct ext4_mount_options old_opts; 3716c79d967dSChristoph Hellwig int enable_quota = 0; 37178a266467STheodore Ts'o ext4_group_t g; 3718b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3719ac27a0ecSDave Kleikamp int err; 3720ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3721ac27a0ecSDave Kleikamp int i; 3722ac27a0ecSDave Kleikamp #endif 3723d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3724ac27a0ecSDave Kleikamp 3725337eb00aSAlessio Igor Bogani lock_kernel(); 3726337eb00aSAlessio Igor Bogani 3727ac27a0ecSDave Kleikamp /* Store the original options */ 3728bbd6851aSAl Viro lock_super(sb); 3729ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3730ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3731ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3732ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3733ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 373430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 373530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3736ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3737ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3738ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3739ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3740ac27a0ecSDave Kleikamp #endif 3741b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3742b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3743ac27a0ecSDave Kleikamp 3744ac27a0ecSDave Kleikamp /* 3745ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3746ac27a0ecSDave Kleikamp */ 3747b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3748b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3749ac27a0ecSDave Kleikamp err = -EINVAL; 3750ac27a0ecSDave Kleikamp goto restore_opts; 3751ac27a0ecSDave Kleikamp } 3752ac27a0ecSDave Kleikamp 37534ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 3754c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 3755ac27a0ecSDave Kleikamp 3756ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3757482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3758ac27a0ecSDave Kleikamp 3759ac27a0ecSDave Kleikamp es = sbi->s_es; 3760ac27a0ecSDave Kleikamp 3761b3881f74STheodore Ts'o if (sbi->s_journal) { 3762617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3763b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3764b3881f74STheodore Ts'o } 3765ac27a0ecSDave Kleikamp 3766ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3767bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 37684ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3769ac27a0ecSDave Kleikamp err = -EROFS; 3770ac27a0ecSDave Kleikamp goto restore_opts; 3771ac27a0ecSDave Kleikamp } 3772ac27a0ecSDave Kleikamp 3773ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 37740f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 37750f0dd62fSChristoph Hellwig if (err < 0) 3776c79d967dSChristoph Hellwig goto restore_opts; 3777c79d967dSChristoph Hellwig 3778ac27a0ecSDave Kleikamp /* 3779ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3780ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3781ac27a0ecSDave Kleikamp */ 3782ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3783ac27a0ecSDave Kleikamp 3784ac27a0ecSDave Kleikamp /* 3785ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3786ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3787ac27a0ecSDave Kleikamp * mark the partition as valid again. 3788ac27a0ecSDave Kleikamp */ 3789617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3790617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3791ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3792ac27a0ecSDave Kleikamp 3793a63c9eb2STheodore Ts'o if (sbi->s_journal) 3794617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3795ac27a0ecSDave Kleikamp } else { 3796a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 3797a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 3798ac27a0ecSDave Kleikamp err = -EROFS; 3799ac27a0ecSDave Kleikamp goto restore_opts; 3800ac27a0ecSDave Kleikamp } 3801ead6596bSEric Sandeen /* 38028a266467STheodore Ts'o * Make sure the group descriptor checksums 38030b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 38048a266467STheodore Ts'o */ 38058a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 38068a266467STheodore Ts'o struct ext4_group_desc *gdp = 38078a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 38088a266467STheodore Ts'o 38098a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3810b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3811b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 38128a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 38138a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 38148a266467STheodore Ts'o err = -EINVAL; 38158a266467STheodore Ts'o goto restore_opts; 38168a266467STheodore Ts'o } 38178a266467STheodore Ts'o } 38188a266467STheodore Ts'o 38198a266467STheodore Ts'o /* 3820ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3821ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3822ead6596bSEric Sandeen * require a full umount/remount for now. 3823ead6596bSEric Sandeen */ 3824ead6596bSEric Sandeen if (es->s_last_orphan) { 3825b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3826ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3827ead6596bSEric Sandeen "orphan inode list. Please " 3828b31e1552SEric Sandeen "umount/remount instead"); 3829ead6596bSEric Sandeen err = -EINVAL; 3830ead6596bSEric Sandeen goto restore_opts; 3831ead6596bSEric Sandeen } 3832ead6596bSEric Sandeen 3833ac27a0ecSDave Kleikamp /* 3834ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3835ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3836ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3837ac27a0ecSDave Kleikamp * the partition.) 3838ac27a0ecSDave Kleikamp */ 38390390131bSFrank Mayhar if (sbi->s_journal) 3840617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3841ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3842617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3843ac27a0ecSDave Kleikamp goto restore_opts; 3844617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3845ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3846c79d967dSChristoph Hellwig enable_quota = 1; 3847ac27a0ecSDave Kleikamp } 3848ac27a0ecSDave Kleikamp } 38496fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 38500390131bSFrank Mayhar if (sbi->s_journal == NULL) 3851e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 38520390131bSFrank Mayhar 3853ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3854ac27a0ecSDave Kleikamp /* Release old quota file names */ 3855ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3856ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3857ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3858ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3859ac27a0ecSDave Kleikamp #endif 3860bbd6851aSAl Viro unlock_super(sb); 3861337eb00aSAlessio Igor Bogani unlock_kernel(); 3862c79d967dSChristoph Hellwig if (enable_quota) 38630f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 3864d4c402d9SCurt Wohlgemuth 3865d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 3866d4c402d9SCurt Wohlgemuth kfree(orig_data); 3867ac27a0ecSDave Kleikamp return 0; 38680b8e58a1SAndreas Dilger 3869ac27a0ecSDave Kleikamp restore_opts: 3870ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3871ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3872ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3873ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3874ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 387530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 387630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3877ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3878ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3879ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3880ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3881ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3882ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3883ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3884ac27a0ecSDave Kleikamp } 3885ac27a0ecSDave Kleikamp #endif 3886bbd6851aSAl Viro unlock_super(sb); 3887337eb00aSAlessio Igor Bogani unlock_kernel(); 3888d4c402d9SCurt Wohlgemuth kfree(orig_data); 3889ac27a0ecSDave Kleikamp return err; 3890ac27a0ecSDave Kleikamp } 3891ac27a0ecSDave Kleikamp 3892617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3893ac27a0ecSDave Kleikamp { 3894ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3895617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3896617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3897960cc398SPekka Enberg u64 fsid; 3898ac27a0ecSDave Kleikamp 38995e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 39005e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 39016bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 39028df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 39035e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3904ac27a0ecSDave Kleikamp 3905ac27a0ecSDave Kleikamp /* 39065e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 39075e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 39085e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3909ac27a0ecSDave Kleikamp */ 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp /* 3912ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3913ac27a0ecSDave Kleikamp * overhead 3914ac27a0ecSDave Kleikamp */ 3915ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3916ac27a0ecSDave Kleikamp 3917ac27a0ecSDave Kleikamp /* 3918ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3919ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3920ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3921ac27a0ecSDave Kleikamp */ 3922ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3923617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3924617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3925ac27a0ecSDave Kleikamp cond_resched(); 3926ac27a0ecSDave Kleikamp } 3927ac27a0ecSDave Kleikamp 3928ac27a0ecSDave Kleikamp /* 3929ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3930ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3931ac27a0ecSDave Kleikamp */ 39325e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 39335e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 39345e70030dSBadari Pulavarty smp_wmb(); 39356bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3936ac27a0ecSDave Kleikamp } 3937ac27a0ecSDave Kleikamp 3938617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3939ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 39405e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 39416bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 39426bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3943bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3944bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3945ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3946ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 394752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 3948617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3949960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3950960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3951960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3952960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 39530b8e58a1SAndreas Dilger 3954ac27a0ecSDave Kleikamp return 0; 3955ac27a0ecSDave Kleikamp } 3956ac27a0ecSDave Kleikamp 39570b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 39580b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3959ac27a0ecSDave Kleikamp * Process 1 Process 2 3960617ba13bSMingming Cao * ext4_create() quota_sync() 3961dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3962871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 3963dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3964ac27a0ecSDave Kleikamp * 3965ac27a0ecSDave Kleikamp */ 3966ac27a0ecSDave Kleikamp 3967ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3968ac27a0ecSDave Kleikamp 3969ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3970ac27a0ecSDave Kleikamp { 3971ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3972ac27a0ecSDave Kleikamp } 3973ac27a0ecSDave Kleikamp 3974617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3975ac27a0ecSDave Kleikamp { 3976ac27a0ecSDave Kleikamp int ret, err; 3977ac27a0ecSDave Kleikamp handle_t *handle; 3978ac27a0ecSDave Kleikamp struct inode *inode; 3979ac27a0ecSDave Kleikamp 3980ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3981617ba13bSMingming Cao handle = ext4_journal_start(inode, 3982617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3983ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3984ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3985ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3986617ba13bSMingming Cao err = ext4_journal_stop(handle); 3987ac27a0ecSDave Kleikamp if (!ret) 3988ac27a0ecSDave Kleikamp ret = err; 3989ac27a0ecSDave Kleikamp return ret; 3990ac27a0ecSDave Kleikamp } 3991ac27a0ecSDave Kleikamp 3992617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3993ac27a0ecSDave Kleikamp { 3994ac27a0ecSDave Kleikamp int ret, err; 3995ac27a0ecSDave Kleikamp handle_t *handle; 3996ac27a0ecSDave Kleikamp 3997617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3998617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3999ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4000ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4001ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4002617ba13bSMingming Cao err = ext4_journal_stop(handle); 4003ac27a0ecSDave Kleikamp if (!ret) 4004ac27a0ecSDave Kleikamp ret = err; 4005ac27a0ecSDave Kleikamp return ret; 4006ac27a0ecSDave Kleikamp } 4007ac27a0ecSDave Kleikamp 4008617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4009ac27a0ecSDave Kleikamp { 4010ac27a0ecSDave Kleikamp int ret, err; 4011ac27a0ecSDave Kleikamp handle_t *handle; 4012ac27a0ecSDave Kleikamp 4013617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4014617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 40159c3013e9SJan Kara if (IS_ERR(handle)) { 40169c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 40179c3013e9SJan Kara dquot_release(dquot); 4018ac27a0ecSDave Kleikamp return PTR_ERR(handle); 40199c3013e9SJan Kara } 4020ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4021617ba13bSMingming Cao err = ext4_journal_stop(handle); 4022ac27a0ecSDave Kleikamp if (!ret) 4023ac27a0ecSDave Kleikamp ret = err; 4024ac27a0ecSDave Kleikamp return ret; 4025ac27a0ecSDave Kleikamp } 4026ac27a0ecSDave Kleikamp 4027617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4028ac27a0ecSDave Kleikamp { 40292c8be6b2SJan Kara /* Are we journaling quotas? */ 4030617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4031617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4032ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4033617ba13bSMingming Cao return ext4_write_dquot(dquot); 4034ac27a0ecSDave Kleikamp } else { 4035ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4036ac27a0ecSDave Kleikamp } 4037ac27a0ecSDave Kleikamp } 4038ac27a0ecSDave Kleikamp 4039617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4040ac27a0ecSDave Kleikamp { 4041ac27a0ecSDave Kleikamp int ret, err; 4042ac27a0ecSDave Kleikamp handle_t *handle; 4043ac27a0ecSDave Kleikamp 4044ac27a0ecSDave Kleikamp /* Data block + inode block */ 4045617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4046ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4047ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4048ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4049617ba13bSMingming Cao err = ext4_journal_stop(handle); 4050ac27a0ecSDave Kleikamp if (!ret) 4051ac27a0ecSDave Kleikamp ret = err; 4052ac27a0ecSDave Kleikamp return ret; 4053ac27a0ecSDave Kleikamp } 4054ac27a0ecSDave Kleikamp 4055ac27a0ecSDave Kleikamp /* 4056ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4057ac27a0ecSDave Kleikamp * the quota file and such... 4058ac27a0ecSDave Kleikamp */ 4059617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4060ac27a0ecSDave Kleikamp { 4061287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4062617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4063ac27a0ecSDave Kleikamp } 4064ac27a0ecSDave Kleikamp 4065ac27a0ecSDave Kleikamp /* 4066ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4067ac27a0ecSDave Kleikamp */ 4068617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4069307ae18aSChristoph Hellwig char *name) 4070ac27a0ecSDave Kleikamp { 4071ac27a0ecSDave Kleikamp int err; 40728264613dSAl Viro struct path path; 4073ac27a0ecSDave Kleikamp 4074ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4075ac27a0ecSDave Kleikamp return -EINVAL; 40760623543bSJan Kara 40778264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 4078ac27a0ecSDave Kleikamp if (err) 4079ac27a0ecSDave Kleikamp return err; 40800623543bSJan Kara 4081ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 40828264613dSAl Viro if (path.mnt->mnt_sb != sb) { 40838264613dSAl Viro path_put(&path); 4084ac27a0ecSDave Kleikamp return -EXDEV; 4085ac27a0ecSDave Kleikamp } 40860623543bSJan Kara /* Journaling quota? */ 40870623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 40882b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 40898264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 4090b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4091b31e1552SEric Sandeen "Quota file not on filesystem root. " 4092b31e1552SEric Sandeen "Journaled quota will not work"); 40930623543bSJan Kara } 40940623543bSJan Kara 40950623543bSJan Kara /* 40960623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 40970623543bSJan Kara * all updates to the file when we bypass pagecache... 40980623543bSJan Kara */ 40990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 41000390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 41010623543bSJan Kara /* 41020623543bSJan Kara * We don't need to lock updates but journal_flush() could 41030623543bSJan Kara * otherwise be livelocked... 41040623543bSJan Kara */ 41050623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 41067ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 41070623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 41087ffe1ea8SHidehiro Kawai if (err) { 41098264613dSAl Viro path_put(&path); 41107ffe1ea8SHidehiro Kawai return err; 41117ffe1ea8SHidehiro Kawai } 41120623543bSJan Kara } 41130623543bSJan Kara 4114287a8095SChristoph Hellwig err = dquot_quota_on_path(sb, type, format_id, &path); 41158264613dSAl Viro path_put(&path); 411677e69dacSAl Viro return err; 4117ac27a0ecSDave Kleikamp } 4118ac27a0ecSDave Kleikamp 4119ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4120ca0e05e4SDmitry Monakhov { 4121ca0e05e4SDmitry Monakhov /* Force all delayed allocation blocks to be allocated */ 4122ca0e05e4SDmitry Monakhov if (test_opt(sb, DELALLOC)) { 4123ca0e05e4SDmitry Monakhov down_read(&sb->s_umount); 4124ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4125ca0e05e4SDmitry Monakhov up_read(&sb->s_umount); 4126ca0e05e4SDmitry Monakhov } 4127ca0e05e4SDmitry Monakhov 4128ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4129ca0e05e4SDmitry Monakhov } 4130ca0e05e4SDmitry Monakhov 4131ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4132ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4133ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 4134ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4135617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4136ac27a0ecSDave Kleikamp size_t len, loff_t off) 4137ac27a0ecSDave Kleikamp { 4138ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4139725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4140ac27a0ecSDave Kleikamp int err = 0; 4141ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4142ac27a0ecSDave Kleikamp int tocopy; 4143ac27a0ecSDave Kleikamp size_t toread; 4144ac27a0ecSDave Kleikamp struct buffer_head *bh; 4145ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4146ac27a0ecSDave Kleikamp 4147ac27a0ecSDave Kleikamp if (off > i_size) 4148ac27a0ecSDave Kleikamp return 0; 4149ac27a0ecSDave Kleikamp if (off+len > i_size) 4150ac27a0ecSDave Kleikamp len = i_size-off; 4151ac27a0ecSDave Kleikamp toread = len; 4152ac27a0ecSDave Kleikamp while (toread > 0) { 4153ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4154ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4155617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4156ac27a0ecSDave Kleikamp if (err) 4157ac27a0ecSDave Kleikamp return err; 4158ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4159ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4160ac27a0ecSDave Kleikamp else 4161ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4162ac27a0ecSDave Kleikamp brelse(bh); 4163ac27a0ecSDave Kleikamp offset = 0; 4164ac27a0ecSDave Kleikamp toread -= tocopy; 4165ac27a0ecSDave Kleikamp data += tocopy; 4166ac27a0ecSDave Kleikamp blk++; 4167ac27a0ecSDave Kleikamp } 4168ac27a0ecSDave Kleikamp return len; 4169ac27a0ecSDave Kleikamp } 4170ac27a0ecSDave Kleikamp 4171ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4172ac27a0ecSDave Kleikamp * enough credits) */ 4173617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4174ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4175ac27a0ecSDave Kleikamp { 4176ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4177725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4178ac27a0ecSDave Kleikamp int err = 0; 4179ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4180ac27a0ecSDave Kleikamp struct buffer_head *bh; 4181ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4182ac27a0ecSDave Kleikamp 41830390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4184b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4185b31e1552SEric Sandeen " cancelled because transaction is not started", 41869c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 41879c3013e9SJan Kara return -EIO; 41889c3013e9SJan Kara } 418967eeb568SDmitry Monakhov /* 419067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 419167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 419267eeb568SDmitry Monakhov */ 419367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 419467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 419567eeb568SDmitry Monakhov " cancelled because not block aligned", 419667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 419767eeb568SDmitry Monakhov return -EIO; 419867eeb568SDmitry Monakhov } 419967eeb568SDmitry Monakhov 4200ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4201617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4202ac27a0ecSDave Kleikamp if (!bh) 4203ac27a0ecSDave Kleikamp goto out; 4204617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4205ac27a0ecSDave Kleikamp if (err) { 4206ac27a0ecSDave Kleikamp brelse(bh); 4207ac27a0ecSDave Kleikamp goto out; 4208ac27a0ecSDave Kleikamp } 4209ac27a0ecSDave Kleikamp lock_buffer(bh); 421067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4211ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4212ac27a0ecSDave Kleikamp unlock_buffer(bh); 42130390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4214ac27a0ecSDave Kleikamp brelse(bh); 4215ac27a0ecSDave Kleikamp out: 421667eeb568SDmitry Monakhov if (err) { 42174d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4218ac27a0ecSDave Kleikamp return err; 42194d04e4fbSJan Kara } 422067eeb568SDmitry Monakhov if (inode->i_size < off + len) { 422167eeb568SDmitry Monakhov i_size_write(inode, off + len); 4222617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4223ac27a0ecSDave Kleikamp } 4224ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 4225617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 4226ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 422767eeb568SDmitry Monakhov return len; 4228ac27a0ecSDave Kleikamp } 4229ac27a0ecSDave Kleikamp 4230ac27a0ecSDave Kleikamp #endif 4231ac27a0ecSDave Kleikamp 42320b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 42330b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 4234ac27a0ecSDave Kleikamp { 4235617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 4236ac27a0ecSDave Kleikamp } 4237ac27a0ecSDave Kleikamp 423837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 423924b58424STheodore Ts'o static struct file_system_type ext2_fs_type = { 424024b58424STheodore Ts'o .owner = THIS_MODULE, 424124b58424STheodore Ts'o .name = "ext2", 424224b58424STheodore Ts'o .get_sb = ext4_get_sb, 424324b58424STheodore Ts'o .kill_sb = kill_block_super, 424424b58424STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 424524b58424STheodore Ts'o }; 424624b58424STheodore Ts'o 424724b58424STheodore Ts'o static inline void register_as_ext2(void) 424824b58424STheodore Ts'o { 424924b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 425024b58424STheodore Ts'o if (err) 425124b58424STheodore Ts'o printk(KERN_WARNING 425224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 425324b58424STheodore Ts'o } 425424b58424STheodore Ts'o 425524b58424STheodore Ts'o static inline void unregister_as_ext2(void) 425624b58424STheodore Ts'o { 425724b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 425824b58424STheodore Ts'o } 425951b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 426024b58424STheodore Ts'o #else 426124b58424STheodore Ts'o static inline void register_as_ext2(void) { } 426224b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 426324b58424STheodore Ts'o #endif 426424b58424STheodore Ts'o 426537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 426624b58424STheodore Ts'o static inline void register_as_ext3(void) 426724b58424STheodore Ts'o { 426824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 426924b58424STheodore Ts'o if (err) 427024b58424STheodore Ts'o printk(KERN_WARNING 427124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 427224b58424STheodore Ts'o } 427324b58424STheodore Ts'o 427424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 427524b58424STheodore Ts'o { 427624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 427724b58424STheodore Ts'o } 427851b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 427924b58424STheodore Ts'o #else 428024b58424STheodore Ts'o static inline void register_as_ext3(void) { } 428124b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 428224b58424STheodore Ts'o #endif 428324b58424STheodore Ts'o 428403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4285ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 428603010a33STheodore Ts'o .name = "ext4", 4287617ba13bSMingming Cao .get_sb = ext4_get_sb, 4288ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4289ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4290ac27a0ecSDave Kleikamp }; 4291ac27a0ecSDave Kleikamp 4292617ba13bSMingming Cao static int __init init_ext4_fs(void) 4293ac27a0ecSDave Kleikamp { 4294c9de560dSAlex Tomas int err; 4295c9de560dSAlex Tomas 429612e9b892SDmitry Monakhov ext4_check_flag_values(); 42976fd058f7STheodore Ts'o err = init_ext4_system_zone(); 42986fd058f7STheodore Ts'o if (err) 42996fd058f7STheodore Ts'o return err; 43003197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 43013197ebdbSTheodore Ts'o if (!ext4_kset) 43026fd058f7STheodore Ts'o goto out4; 43039f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4304c9de560dSAlex Tomas err = init_ext4_mballoc(); 4305ac27a0ecSDave Kleikamp if (err) 43066fd058f7STheodore Ts'o goto out3; 4307c9de560dSAlex Tomas 4308c9de560dSAlex Tomas err = init_ext4_xattr(); 4309c9de560dSAlex Tomas if (err) 4310c9de560dSAlex Tomas goto out2; 4311ac27a0ecSDave Kleikamp err = init_inodecache(); 4312ac27a0ecSDave Kleikamp if (err) 4313ac27a0ecSDave Kleikamp goto out1; 431424b58424STheodore Ts'o register_as_ext2(); 431524b58424STheodore Ts'o register_as_ext3(); 431603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4317ac27a0ecSDave Kleikamp if (err) 4318ac27a0ecSDave Kleikamp goto out; 4319ac27a0ecSDave Kleikamp return 0; 4320ac27a0ecSDave Kleikamp out: 432124b58424STheodore Ts'o unregister_as_ext2(); 432224b58424STheodore Ts'o unregister_as_ext3(); 4323ac27a0ecSDave Kleikamp destroy_inodecache(); 4324ac27a0ecSDave Kleikamp out1: 4325617ba13bSMingming Cao exit_ext4_xattr(); 4326c9de560dSAlex Tomas out2: 4327c9de560dSAlex Tomas exit_ext4_mballoc(); 43286fd058f7STheodore Ts'o out3: 43296fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 43306fd058f7STheodore Ts'o kset_unregister(ext4_kset); 43316fd058f7STheodore Ts'o out4: 43326fd058f7STheodore Ts'o exit_ext4_system_zone(); 4333ac27a0ecSDave Kleikamp return err; 4334ac27a0ecSDave Kleikamp } 4335ac27a0ecSDave Kleikamp 4336617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4337ac27a0ecSDave Kleikamp { 433824b58424STheodore Ts'o unregister_as_ext2(); 433924b58424STheodore Ts'o unregister_as_ext3(); 434003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 4341ac27a0ecSDave Kleikamp destroy_inodecache(); 4342617ba13bSMingming Cao exit_ext4_xattr(); 4343c9de560dSAlex Tomas exit_ext4_mballoc(); 43449f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 43453197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 43466fd058f7STheodore Ts'o exit_ext4_system_zone(); 4347ac27a0ecSDave Kleikamp } 4348ac27a0ecSDave Kleikamp 4349ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 435083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4351ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4352617ba13bSMingming Cao module_init(init_ext4_fs) 4353617ba13bSMingming Cao module_exit(exit_ext4_fs) 4354