ext4.h (ea77f7a2e8561012cf100c530170f12351c3b53e) ext4.h (aa38572954ade525817fe88c54faebf85e5a61c0)
1/*
2 * ext4.h
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *

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103/* allocate goal blocks or none */
104#define EXT4_MB_HINT_GOAL_ONLY 0x0100
105/* goal is meaningful */
106#define EXT4_MB_HINT_TRY_GOAL 0x0200
107/* blocks already pre-reserved by delayed allocation */
108#define EXT4_MB_DELALLOC_RESERVED 0x0400
109/* We are doing stream allocation */
110#define EXT4_MB_STREAM_ALLOC 0x0800
1/*
2 * ext4.h
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *

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103/* allocate goal blocks or none */
104#define EXT4_MB_HINT_GOAL_ONLY 0x0100
105/* goal is meaningful */
106#define EXT4_MB_HINT_TRY_GOAL 0x0200
107/* blocks already pre-reserved by delayed allocation */
108#define EXT4_MB_DELALLOC_RESERVED 0x0400
109/* We are doing stream allocation */
110#define EXT4_MB_STREAM_ALLOC 0x0800
111/* Use reserved root blocks if needed */
112#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
111
113
112
113struct ext4_allocation_request {
114 /* target inode for block we're allocating */
115 struct inode *inode;
116 /* how many blocks we want to allocate */
117 unsigned int len;
118 /* logical block in target inode */
119 ext4_lblk_t logical;
120 /* the closest logical allocated block to the left */

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204 sector_t io_next_block;
205};
206
207/*
208 * Special inodes numbers
209 */
210#define EXT4_BAD_INO 1 /* Bad blocks inode */
211#define EXT4_ROOT_INO 2 /* Root inode */
114struct ext4_allocation_request {
115 /* target inode for block we're allocating */
116 struct inode *inode;
117 /* how many blocks we want to allocate */
118 unsigned int len;
119 /* logical block in target inode */
120 ext4_lblk_t logical;
121 /* the closest logical allocated block to the left */

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205 sector_t io_next_block;
206};
207
208/*
209 * Special inodes numbers
210 */
211#define EXT4_BAD_INO 1 /* Bad blocks inode */
212#define EXT4_ROOT_INO 2 /* Root inode */
213#define EXT4_USR_QUOTA_INO 3 /* User quota inode */
214#define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */
212#define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */
213#define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */
214#define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */
215#define EXT4_JOURNAL_INO 8 /* Journal inode */
216
217/* First non-reserved inode for old ext4 filesystems */
218#define EXT4_GOOD_OLD_FIRST_INO 11
219

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507 extent if blocks has been preallocated already*/
508#define EXT4_GET_BLOCKS_PRE_IO 0x0008
509#define EXT4_GET_BLOCKS_CONVERT 0x0010
510#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
511 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
512 /* Convert extent to initialized after IO complete */
513#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
514 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
215#define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */
216#define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */
217#define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */
218#define EXT4_JOURNAL_INO 8 /* Journal inode */
219
220/* First non-reserved inode for old ext4 filesystems */
221#define EXT4_GOOD_OLD_FIRST_INO 11
222

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510 extent if blocks has been preallocated already*/
511#define EXT4_GET_BLOCKS_PRE_IO 0x0008
512#define EXT4_GET_BLOCKS_CONVERT 0x0010
513#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
514 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
515 /* Convert extent to initialized after IO complete */
516#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
517 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
518 /* Punch out blocks of an extent */
519#define EXT4_GET_BLOCKS_PUNCH_OUT_EXT 0x0020
520 /* Don't normalize allocation size (used for fallocate) */
521#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
515
516/*
517 * Flags used by ext4_free_blocks
518 */
519#define EXT4_FREE_BLOCKS_METADATA 0x0001
520#define EXT4_FREE_BLOCKS_FORGET 0x0002
521#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
522

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1023 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
1024/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
1025 __le32 s_r_blocks_count_hi; /* Reserved blocks count */
1026 __le32 s_free_blocks_count_hi; /* Free blocks count */
1027 __le16 s_min_extra_isize; /* All inodes have at least # bytes */
1028 __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
1029 __le32 s_flags; /* Miscellaneous flags */
1030 __le16 s_raid_stride; /* RAID stride */
522
523/*
524 * Flags used by ext4_free_blocks
525 */
526#define EXT4_FREE_BLOCKS_METADATA 0x0001
527#define EXT4_FREE_BLOCKS_FORGET 0x0002
528#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
529

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1030 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
1031/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
1032 __le32 s_r_blocks_count_hi; /* Reserved blocks count */
1033 __le32 s_free_blocks_count_hi; /* Free blocks count */
1034 __le16 s_min_extra_isize; /* All inodes have at least # bytes */
1035 __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
1036 __le32 s_flags; /* Miscellaneous flags */
1037 __le16 s_raid_stride; /* RAID stride */
1031 __le16 s_mmp_interval; /* # seconds to wait in MMP checking */
1038 __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */
1032 __le64 s_mmp_block; /* Block for multi-mount protection */
1033 __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
1034 __u8 s_log_groups_per_flex; /* FLEX_BG group size */
1035 __u8 s_reserved_char_pad;
1036 __le16 s_reserved_pad;
1037 __le64 s_kbytes_written; /* nr of lifetime kilobytes written */
1038 __le32 s_snapshot_inum; /* Inode number of active snapshot */
1039 __le32 s_snapshot_id; /* sequential ID of active snapshot */

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1139 /* ext4 extents stats */
1140 unsigned long s_ext_min;
1141 unsigned long s_ext_max;
1142 unsigned long s_depth_max;
1143 spinlock_t s_ext_stats_lock;
1144 unsigned long s_ext_blocks;
1145 unsigned long s_ext_extents;
1146#endif
1039 __le64 s_mmp_block; /* Block for multi-mount protection */
1040 __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
1041 __u8 s_log_groups_per_flex; /* FLEX_BG group size */
1042 __u8 s_reserved_char_pad;
1043 __le16 s_reserved_pad;
1044 __le64 s_kbytes_written; /* nr of lifetime kilobytes written */
1045 __le32 s_snapshot_inum; /* Inode number of active snapshot */
1046 __le32 s_snapshot_id; /* sequential ID of active snapshot */

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1146 /* ext4 extents stats */
1147 unsigned long s_ext_min;
1148 unsigned long s_ext_max;
1149 unsigned long s_depth_max;
1150 spinlock_t s_ext_stats_lock;
1151 unsigned long s_ext_blocks;
1152 unsigned long s_ext_extents;
1153#endif
1154 /* ext4 extent cache stats */
1155 unsigned long extent_cache_hits;
1156 unsigned long extent_cache_misses;
1147
1148 /* for buddy allocator */
1149 struct ext4_group_info ***s_group_info;
1150 struct inode *s_buddy_cache;
1151 spinlock_t s_md_lock;
1152 unsigned short *s_mb_offsets;
1153 unsigned int *s_mb_maxs;
1154

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1196
1197 /* timer for periodic error stats printing */
1198 struct timer_list s_err_report;
1199
1200 /* Lazy inode table initialization info */
1201 struct ext4_li_request *s_li_request;
1202 /* Wait multiplier for lazy initialization thread */
1203 unsigned int s_li_wait_mult;
1157
1158 /* for buddy allocator */
1159 struct ext4_group_info ***s_group_info;
1160 struct inode *s_buddy_cache;
1161 spinlock_t s_md_lock;
1162 unsigned short *s_mb_offsets;
1163 unsigned int *s_mb_maxs;
1164

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1206
1207 /* timer for periodic error stats printing */
1208 struct timer_list s_err_report;
1209
1210 /* Lazy inode table initialization info */
1211 struct ext4_li_request *s_li_request;
1212 /* Wait multiplier for lazy initialization thread */
1213 unsigned int s_li_wait_mult;
1214
1215 /* Kernel thread for multiple mount protection */
1216 struct task_struct *s_mmp_tsk;
1204};
1205
1206static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1207{
1208 return sb->s_fs_info;
1209}
1210static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1211{

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1333
1334#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1335#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
1336#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
1337#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
1338#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1339#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
1340#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
1217};
1218
1219static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1220{
1221 return sb->s_fs_info;
1222}
1223static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1224{

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1346
1347#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1348#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
1349#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
1350#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
1351#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1352#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
1353#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
1354#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
1341
1342#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
1343#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
1344#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
1345#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
1346#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
1347#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
1348#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
1349#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
1350#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
1351#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */
1352#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
1353
1355
1356#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
1357#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
1358#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
1359#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
1360#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
1361#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
1362#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
1363#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
1364#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
1365#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */
1366#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
1367
1368#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1369#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1370 EXT4_FEATURE_INCOMPAT_META_BG)
1371#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1372 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1373 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1374
1375#define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1376#define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1377 EXT4_FEATURE_INCOMPAT_RECOVER| \
1378 EXT4_FEATURE_INCOMPAT_META_BG)
1379#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1380 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1381 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1382
1354#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
1355#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1356 EXT4_FEATURE_INCOMPAT_RECOVER| \
1357 EXT4_FEATURE_INCOMPAT_META_BG| \
1358 EXT4_FEATURE_INCOMPAT_EXTENTS| \
1359 EXT4_FEATURE_INCOMPAT_64BIT| \
1383#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
1384#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1385 EXT4_FEATURE_INCOMPAT_RECOVER| \
1386 EXT4_FEATURE_INCOMPAT_META_BG| \
1387 EXT4_FEATURE_INCOMPAT_EXTENTS| \
1388 EXT4_FEATURE_INCOMPAT_64BIT| \
1360 EXT4_FEATURE_INCOMPAT_FLEX_BG)
1389 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
1390 EXT4_FEATURE_INCOMPAT_MMP)
1361#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1362 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1363 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
1364 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
1365 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
1366 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
1367 EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
1368

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1585#define EXT4_LAZYINIT_QUIT 0x0001
1586#define EXT4_LAZYINIT_RUNNING 0x0002
1587
1588/*
1589 * Lazy inode table initialization info
1590 */
1591struct ext4_lazy_init {
1592 unsigned long li_state;
1391#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1392 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1393 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
1394 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
1395 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
1396 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
1397 EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
1398

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1615#define EXT4_LAZYINIT_QUIT 0x0001
1616#define EXT4_LAZYINIT_RUNNING 0x0002
1617
1618/*
1619 * Lazy inode table initialization info
1620 */
1621struct ext4_lazy_init {
1622 unsigned long li_state;
1593
1594 wait_queue_head_t li_wait_daemon;
1595 wait_queue_head_t li_wait_task;
1596 struct timer_list li_timer;
1597 struct task_struct *li_task;
1598
1599 struct list_head li_request_list;
1600 struct mutex li_list_mtx;
1601};
1602
1603struct ext4_li_request {
1604 struct super_block *lr_super;
1605 struct ext4_sb_info *lr_sbi;
1606 ext4_group_t lr_next_group;
1607 struct list_head lr_request;
1608 unsigned long lr_next_sched;
1609 unsigned long lr_timeout;
1610};
1611
1612struct ext4_features {
1613 struct kobject f_kobj;
1614 struct completion f_kobj_unregister;
1615};
1616
1617/*
1623 struct list_head li_request_list;
1624 struct mutex li_list_mtx;
1625};
1626
1627struct ext4_li_request {
1628 struct super_block *lr_super;
1629 struct ext4_sb_info *lr_sbi;
1630 ext4_group_t lr_next_group;
1631 struct list_head lr_request;
1632 unsigned long lr_next_sched;
1633 unsigned long lr_timeout;
1634};
1635
1636struct ext4_features {
1637 struct kobject f_kobj;
1638 struct completion f_kobj_unregister;
1639};
1640
1641/*
1642 * This structure will be used for multiple mount protection. It will be
1643 * written into the block number saved in the s_mmp_block field in the
1644 * superblock. Programs that check MMP should assume that if
1645 * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe
1646 * to use the filesystem, regardless of how old the timestamp is.
1647 */
1648#define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */
1649#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */
1650#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */
1651#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */
1652
1653struct mmp_struct {
1654 __le32 mmp_magic; /* Magic number for MMP */
1655 __le32 mmp_seq; /* Sequence no. updated periodically */
1656
1657 /*
1658 * mmp_time, mmp_nodename & mmp_bdevname are only used for information
1659 * purposes and do not affect the correctness of the algorithm
1660 */
1661 __le64 mmp_time; /* Time last updated */
1662 char mmp_nodename[64]; /* Node which last updated MMP block */
1663 char mmp_bdevname[32]; /* Bdev which last updated MMP block */
1664
1665 /*
1666 * mmp_check_interval is used to verify if the MMP block has been
1667 * updated on the block device. The value is updated based on the
1668 * maximum time to write the MMP block during an update cycle.
1669 */
1670 __le16 mmp_check_interval;
1671
1672 __le16 mmp_pad1;
1673 __le32 mmp_pad2[227];
1674};
1675
1676/* arguments passed to the mmp thread */
1677struct mmpd_data {
1678 struct buffer_head *bh; /* bh from initial read_mmp_block() */
1679 struct super_block *sb; /* super block of the fs */
1680};
1681
1682/*
1683 * Check interval multiplier
1684 * The MMP block is written every update interval and initially checked every
1685 * update interval x the multiplier (the value is then adapted based on the
1686 * write latency). The reason is that writes can be delayed under load and we
1687 * don't want readers to incorrectly assume that the filesystem is no longer
1688 * in use.
1689 */
1690#define EXT4_MMP_CHECK_MULT 2UL
1691
1692/*
1693 * Minimum interval for MMP checking in seconds.
1694 */
1695#define EXT4_MMP_MIN_CHECK_INTERVAL 5UL
1696
1697/*
1698 * Maximum interval for MMP checking in seconds.
1699 */
1700#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
1701
1702/*
1618 * Function prototypes
1619 */
1620
1621/*
1622 * Ok, these declarations are also in <linux/kernel.h> but none of the
1623 * ext4 source programs needs to include it so they are duplicated here.
1624 */
1625# define NORET_TYPE /**/

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1633extern unsigned int ext4_block_group(struct super_block *sb,
1634 ext4_fsblk_t blocknr);
1635extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
1636 ext4_fsblk_t blocknr);
1637extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
1638extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
1639 ext4_group_t group);
1640extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
1703 * Function prototypes
1704 */
1705
1706/*
1707 * Ok, these declarations are also in <linux/kernel.h> but none of the
1708 * ext4 source programs needs to include it so they are duplicated here.
1709 */
1710# define NORET_TYPE /**/

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1718extern unsigned int ext4_block_group(struct super_block *sb,
1719 ext4_fsblk_t blocknr);
1720extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
1721 ext4_fsblk_t blocknr);
1722extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
1723extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
1724 ext4_group_t group);
1725extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
1641 ext4_fsblk_t goal, unsigned long *count, int *errp);
1642extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
1643extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
1644 ext4_fsblk_t block, unsigned long count);
1726 ext4_fsblk_t goal,
1727 unsigned int flags,
1728 unsigned long *count,
1729 int *errp);
1730extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
1731 s64 nblocks, unsigned int flags);
1645extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
1646extern void ext4_check_blocks_bitmap(struct super_block *);
1647extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
1648 ext4_group_t block_group,
1649 struct buffer_head ** bh);
1650extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
1651struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
1652 ext4_group_t block_group);

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1701extern void ext4_discard_preallocations(struct inode *);
1702extern int __init ext4_init_mballoc(void);
1703extern void ext4_exit_mballoc(void);
1704extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
1705 struct buffer_head *bh, ext4_fsblk_t block,
1706 unsigned long count, int flags);
1707extern int ext4_mb_add_groupinfo(struct super_block *sb,
1708 ext4_group_t i, struct ext4_group_desc *desc);
1732extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
1733extern void ext4_check_blocks_bitmap(struct super_block *);
1734extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
1735 ext4_group_t block_group,
1736 struct buffer_head ** bh);
1737extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
1738struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
1739 ext4_group_t block_group);

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1788extern void ext4_discard_preallocations(struct inode *);
1789extern int __init ext4_init_mballoc(void);
1790extern void ext4_exit_mballoc(void);
1791extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
1792 struct buffer_head *bh, ext4_fsblk_t block,
1793 unsigned long count, int flags);
1794extern int ext4_mb_add_groupinfo(struct super_block *sb,
1795 ext4_group_t i, struct ext4_group_desc *desc);
1796extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
1797 ext4_fsblk_t block, unsigned long count);
1709extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
1710
1711/* inode.c */
1712struct buffer_head *ext4_getblk(handle_t *, struct inode *,
1713 ext4_lblk_t, int, int *);
1714struct buffer_head *ext4_bread(handle_t *, struct inode *,
1715 ext4_lblk_t, int, int *);
1716int ext4_get_block(struct inode *inode, sector_t iblock,
1717 struct buffer_head *bh_result, int create);
1718
1719extern struct inode *ext4_iget(struct super_block *, unsigned long);
1720extern int ext4_write_inode(struct inode *, struct writeback_control *);
1721extern int ext4_setattr(struct dentry *, struct iattr *);
1722extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
1723 struct kstat *stat);
1724extern void ext4_evict_inode(struct inode *);
1725extern void ext4_clear_inode(struct inode *);
1726extern int ext4_sync_inode(handle_t *, struct inode *);
1798extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
1799
1800/* inode.c */
1801struct buffer_head *ext4_getblk(handle_t *, struct inode *,
1802 ext4_lblk_t, int, int *);
1803struct buffer_head *ext4_bread(handle_t *, struct inode *,
1804 ext4_lblk_t, int, int *);
1805int ext4_get_block(struct inode *inode, sector_t iblock,
1806 struct buffer_head *bh_result, int create);
1807
1808extern struct inode *ext4_iget(struct super_block *, unsigned long);
1809extern int ext4_write_inode(struct inode *, struct writeback_control *);
1810extern int ext4_setattr(struct dentry *, struct iattr *);
1811extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
1812 struct kstat *stat);
1813extern void ext4_evict_inode(struct inode *);
1814extern void ext4_clear_inode(struct inode *);
1815extern int ext4_sync_inode(handle_t *, struct inode *);
1727extern void ext4_dirty_inode(struct inode *);
1816extern void ext4_dirty_inode(struct inode *, int);
1728extern int ext4_change_inode_journal_flag(struct inode *, int);
1729extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
1730extern int ext4_can_truncate(struct inode *inode);
1731extern void ext4_truncate(struct inode *);
1817extern int ext4_change_inode_journal_flag(struct inode *, int);
1818extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
1819extern int ext4_can_truncate(struct inode *inode);
1820extern void ext4_truncate(struct inode *);
1821extern int ext4_punch_hole(struct file *file, loff_t offset, loff_t length);
1732extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks);
1733extern void ext4_set_inode_flags(struct inode *);
1734extern void ext4_get_inode_flags(struct ext4_inode_info *);
1735extern int ext4_alloc_da_blocks(struct inode *inode);
1736extern void ext4_set_aops(struct inode *inode);
1737extern int ext4_writepage_trans_blocks(struct inode *);
1738extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
1739extern int ext4_block_truncate_page(handle_t *handle,
1740 struct address_space *mapping, loff_t from);
1822extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks);
1823extern void ext4_set_inode_flags(struct inode *);
1824extern void ext4_get_inode_flags(struct ext4_inode_info *);
1825extern int ext4_alloc_da_blocks(struct inode *inode);
1826extern void ext4_set_aops(struct inode *inode);
1827extern int ext4_writepage_trans_blocks(struct inode *);
1828extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
1829extern int ext4_block_truncate_page(handle_t *handle,
1830 struct address_space *mapping, loff_t from);
1831extern int ext4_block_zero_page_range(handle_t *handle,
1832 struct address_space *mapping, loff_t from, loff_t length);
1741extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
1742extern qsize_t *ext4_get_reserved_space(struct inode *inode);
1743extern void ext4_da_update_reserve_space(struct inode *inode,
1744 int used, int quota_claim);
1745/* ioctl.c */
1746extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
1747extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
1748

--- 34 unchanged lines hidden (view full) ---

1783 __LINE__, ## message)
1784extern void __ext4_warning(struct super_block *, const char *, unsigned int,
1785 const char *, ...)
1786 __attribute__ ((format (printf, 4, 5)));
1787#define ext4_warning(sb, message...) __ext4_warning(sb, __func__, \
1788 __LINE__, ## message)
1789extern void ext4_msg(struct super_block *, const char *, const char *, ...)
1790 __attribute__ ((format (printf, 3, 4)));
1833extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
1834extern qsize_t *ext4_get_reserved_space(struct inode *inode);
1835extern void ext4_da_update_reserve_space(struct inode *inode,
1836 int used, int quota_claim);
1837/* ioctl.c */
1838extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
1839extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
1840

--- 34 unchanged lines hidden (view full) ---

1875 __LINE__, ## message)
1876extern void __ext4_warning(struct super_block *, const char *, unsigned int,
1877 const char *, ...)
1878 __attribute__ ((format (printf, 4, 5)));
1879#define ext4_warning(sb, message...) __ext4_warning(sb, __func__, \
1880 __LINE__, ## message)
1881extern void ext4_msg(struct super_block *, const char *, const char *, ...)
1882 __attribute__ ((format (printf, 3, 4)));
1883extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
1884 const char *, unsigned int, const char *);
1885#define dump_mmp_msg(sb, mmp, msg) __dump_mmp_msg(sb, mmp, __func__, \
1886 __LINE__, msg)
1791extern void __ext4_grp_locked_error(const char *, unsigned int, \
1792 struct super_block *, ext4_group_t, \
1793 unsigned long, ext4_fsblk_t, \
1794 const char *, ...)
1795 __attribute__ ((format (printf, 7, 8)));
1796#define ext4_grp_locked_error(sb, grp, message...) \
1797 __ext4_grp_locked_error(__func__, __LINE__, (sb), (grp), ## message)
1798extern void ext4_update_dynamic_rev(struct super_block *sb);

--- 260 unchanged lines hidden (view full) ---

2059/* extents.c */
2060extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
2061extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
2062extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
2063 int chunk);
2064extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
2065 struct ext4_map_blocks *map, int flags);
2066extern void ext4_ext_truncate(struct inode *);
1887extern void __ext4_grp_locked_error(const char *, unsigned int, \
1888 struct super_block *, ext4_group_t, \
1889 unsigned long, ext4_fsblk_t, \
1890 const char *, ...)
1891 __attribute__ ((format (printf, 7, 8)));
1892#define ext4_grp_locked_error(sb, grp, message...) \
1893 __ext4_grp_locked_error(__func__, __LINE__, (sb), (grp), ## message)
1894extern void ext4_update_dynamic_rev(struct super_block *sb);

--- 260 unchanged lines hidden (view full) ---

2155/* extents.c */
2156extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
2157extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
2158extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
2159 int chunk);
2160extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
2161 struct ext4_map_blocks *map, int flags);
2162extern void ext4_ext_truncate(struct inode *);
2163extern int ext4_ext_punch_hole(struct file *file, loff_t offset,
2164 loff_t length);
2067extern void ext4_ext_init(struct super_block *);
2068extern void ext4_ext_release(struct super_block *);
2069extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
2070 loff_t len);
2071extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
2072 ssize_t len);
2073extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
2074 struct ext4_map_blocks *map, int flags);

--- 12 unchanged lines hidden (view full) ---

2087extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
2088extern int ext4_end_io_nolock(ext4_io_end_t *io);
2089extern void ext4_io_submit(struct ext4_io_submit *io);
2090extern int ext4_bio_write_page(struct ext4_io_submit *io,
2091 struct page *page,
2092 int len,
2093 struct writeback_control *wbc);
2094
2165extern void ext4_ext_init(struct super_block *);
2166extern void ext4_ext_release(struct super_block *);
2167extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
2168 loff_t len);
2169extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
2170 ssize_t len);
2171extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
2172 struct ext4_map_blocks *map, int flags);

--- 12 unchanged lines hidden (view full) ---

2185extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
2186extern int ext4_end_io_nolock(ext4_io_end_t *io);
2187extern void ext4_io_submit(struct ext4_io_submit *io);
2188extern int ext4_bio_write_page(struct ext4_io_submit *io,
2189 struct page *page,
2190 int len,
2191 struct writeback_control *wbc);
2192
2193/* mmp.c */
2194extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
2195
2095/* BH_Uninit flag: blocks are allocated but uninitialized on disk */
2096enum ext4_state_bits {
2097 BH_Uninit /* blocks are allocated but uninitialized on disk */
2098 = BH_JBDPrivateStart,
2099};
2100
2101BUFFER_FNS(Uninit, uninit)
2102TAS_BUFFER_FNS(Uninit, uninit)

--- 32 unchanged lines hidden --- 		2196/* BH_Uninit flag: blocks are allocated but uninitialized on disk */
2197enum ext4_state_bits {
2198 BH_Uninit /* blocks are allocated but uninitialized on disk */
2199 = BH_JBDPrivateStart,
2200};
2201
2202BUFFER_FNS(Uninit, uninit)
2203TAS_BUFFER_FNS(Uninit, uninit)

--- 32 unchanged lines hidden ---