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-rw-r--r--include/linux/ext4_fs.h198
1 files changed, 162 insertions, 36 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 97dd409d5f4a..1852313fc7c7 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -20,6 +20,8 @@
20#include <linux/blkdev.h> 20#include <linux/blkdev.h>
21#include <linux/magic.h> 21#include <linux/magic.h>
22 22
23#include <linux/ext4_fs_i.h>
24
23/* 25/*
24 * The second extended filesystem constants/structures 26 * The second extended filesystem constants/structures
25 */ 27 */
@@ -51,6 +53,50 @@
51#define ext4_debug(f, a...) do {} while (0) 53#define ext4_debug(f, a...) do {} while (0)
52#endif 54#endif
53 55
56#define EXT4_MULTIBLOCK_ALLOCATOR 1
57
58/* prefer goal again. length */
59#define EXT4_MB_HINT_MERGE 1
60/* blocks already reserved */
61#define EXT4_MB_HINT_RESERVED 2
62/* metadata is being allocated */
63#define EXT4_MB_HINT_METADATA 4
64/* first blocks in the file */
65#define EXT4_MB_HINT_FIRST 8
66/* search for the best chunk */
67#define EXT4_MB_HINT_BEST 16
68/* data is being allocated */
69#define EXT4_MB_HINT_DATA 32
70/* don't preallocate (for tails) */
71#define EXT4_MB_HINT_NOPREALLOC 64
72/* allocate for locality group */
73#define EXT4_MB_HINT_GROUP_ALLOC 128
74/* allocate goal blocks or none */
75#define EXT4_MB_HINT_GOAL_ONLY 256
76/* goal is meaningful */
77#define EXT4_MB_HINT_TRY_GOAL 512
78
79struct ext4_allocation_request {
80 /* target inode for block we're allocating */
81 struct inode *inode;
82 /* logical block in target inode */
83 ext4_lblk_t logical;
84 /* phys. target (a hint) */
85 ext4_fsblk_t goal;
86 /* the closest logical allocated block to the left */
87 ext4_lblk_t lleft;
88 /* phys. block for ^^^ */
89 ext4_fsblk_t pleft;
90 /* the closest logical allocated block to the right */
91 ext4_lblk_t lright;
92 /* phys. block for ^^^ */
93 ext4_fsblk_t pright;
94 /* how many blocks we want to allocate */
95 unsigned long len;
96 /* flags. see above EXT4_MB_HINT_* */
97 unsigned long flags;
98};
99
54/* 100/*
55 * Special inodes numbers 101 * Special inodes numbers
56 */ 102 */
@@ -73,8 +119,8 @@
73 * Macro-instructions used to manage several block sizes 119 * Macro-instructions used to manage several block sizes
74 */ 120 */
75#define EXT4_MIN_BLOCK_SIZE 1024 121#define EXT4_MIN_BLOCK_SIZE 1024
76#define EXT4_MAX_BLOCK_SIZE 4096 122#define EXT4_MAX_BLOCK_SIZE 65536
77#define EXT4_MIN_BLOCK_LOG_SIZE 10 123#define EXT4_MIN_BLOCK_LOG_SIZE 10
78#ifdef __KERNEL__ 124#ifdef __KERNEL__
79# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 125# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
80#else 126#else
@@ -118,6 +164,11 @@ struct ext4_group_desc
118 __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 164 __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */
119 __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 165 __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */
120 __le32 bg_inode_table_hi; /* Inodes table block MSB */ 166 __le32 bg_inode_table_hi; /* Inodes table block MSB */
167 __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */
168 __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */
169 __le16 bg_used_dirs_count_hi; /* Directories count MSB */
170 __le16 bg_itable_unused_hi; /* Unused inodes count MSB */
171 __u32 bg_reserved2[3];
121}; 172};
122 173
123#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 174#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */
@@ -178,8 +229,9 @@ struct ext4_group_desc
178#define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 229#define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */
179#define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 230#define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
180#define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 231#define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
181#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 232#define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */
182#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 233#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
234#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
183 235
184#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ 236#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */
185#define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ 237#define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
@@ -237,6 +289,7 @@ struct ext4_new_group_data {
237#endif 289#endif
238#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 290#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
239#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 291#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
292#define EXT4_IOC_MIGRATE _IO('f', 7)
240 293
241/* 294/*
242 * ioctl commands in 32 bit emulation 295 * ioctl commands in 32 bit emulation
@@ -275,18 +328,18 @@ struct ext4_mount_options {
275struct ext4_inode { 328struct ext4_inode {
276 __le16 i_mode; /* File mode */ 329 __le16 i_mode; /* File mode */
277 __le16 i_uid; /* Low 16 bits of Owner Uid */ 330 __le16 i_uid; /* Low 16 bits of Owner Uid */
278 __le32 i_size; /* Size in bytes */ 331 __le32 i_size_lo; /* Size in bytes */
279 __le32 i_atime; /* Access time */ 332 __le32 i_atime; /* Access time */
280 __le32 i_ctime; /* Inode Change time */ 333 __le32 i_ctime; /* Inode Change time */
281 __le32 i_mtime; /* Modification time */ 334 __le32 i_mtime; /* Modification time */
282 __le32 i_dtime; /* Deletion Time */ 335 __le32 i_dtime; /* Deletion Time */
283 __le16 i_gid; /* Low 16 bits of Group Id */ 336 __le16 i_gid; /* Low 16 bits of Group Id */
284 __le16 i_links_count; /* Links count */ 337 __le16 i_links_count; /* Links count */
285 __le32 i_blocks; /* Blocks count */ 338 __le32 i_blocks_lo; /* Blocks count */
286 __le32 i_flags; /* File flags */ 339 __le32 i_flags; /* File flags */
287 union { 340 union {
288 struct { 341 struct {
289 __u32 l_i_reserved1; 342 __le32 l_i_version;
290 } linux1; 343 } linux1;
291 struct { 344 struct {
292 __u32 h_i_translator; 345 __u32 h_i_translator;
@@ -297,12 +350,12 @@ struct ext4_inode {
297 } osd1; /* OS dependent 1 */ 350 } osd1; /* OS dependent 1 */
298 __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 351 __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
299 __le32 i_generation; /* File version (for NFS) */ 352 __le32 i_generation; /* File version (for NFS) */
300 __le32 i_file_acl; /* File ACL */ 353 __le32 i_file_acl_lo; /* File ACL */
301 __le32 i_dir_acl; /* Directory ACL */ 354 __le32 i_size_high;
302 __le32 i_obso_faddr; /* Obsoleted fragment address */ 355 __le32 i_obso_faddr; /* Obsoleted fragment address */
303 union { 356 union {
304 struct { 357 struct {
305 __le16 l_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 358 __le16 l_i_blocks_high; /* were l_i_reserved1 */
306 __le16 l_i_file_acl_high; 359 __le16 l_i_file_acl_high;
307 __le16 l_i_uid_high; /* these 2 fields */ 360 __le16 l_i_uid_high; /* these 2 fields */
308 __le16 l_i_gid_high; /* were reserved2[0] */ 361 __le16 l_i_gid_high; /* were reserved2[0] */
@@ -328,9 +381,9 @@ struct ext4_inode {
328 __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 381 __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */
329 __le32 i_crtime; /* File Creation time */ 382 __le32 i_crtime; /* File Creation time */
330 __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 383 __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
384 __le32 i_version_hi; /* high 32 bits for 64-bit version */
331}; 385};
332 386
333#define i_size_high i_dir_acl
334 387
335#define EXT4_EPOCH_BITS 2 388#define EXT4_EPOCH_BITS 2
336#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 389#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
@@ -402,9 +455,12 @@ do { \
402 raw_inode->xtime ## _extra); \ 455 raw_inode->xtime ## _extra); \
403} while (0) 456} while (0)
404 457
458#define i_disk_version osd1.linux1.l_i_version
459
405#if defined(__KERNEL__) || defined(__linux__) 460#if defined(__KERNEL__) || defined(__linux__)
406#define i_reserved1 osd1.linux1.l_i_reserved1 461#define i_reserved1 osd1.linux1.l_i_reserved1
407#define i_file_acl_high osd2.linux2.l_i_file_acl_high 462#define i_file_acl_high osd2.linux2.l_i_file_acl_high
463#define i_blocks_high osd2.linux2.l_i_blocks_high
408#define i_uid_low i_uid 464#define i_uid_low i_uid
409#define i_gid_low i_gid 465#define i_gid_low i_gid
410#define i_uid_high osd2.linux2.l_i_uid_high 466#define i_uid_high osd2.linux2.l_i_uid_high
@@ -461,7 +517,10 @@ do { \
461#define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ 517#define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
462#define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ 518#define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
463#define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ 519#define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */
464 520#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */
521#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */
522#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */
523#define EXT4_MOUNT_MBALLOC 0x4000000 /* Buddy allocation support */
465/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ 524/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
466#ifndef _LINUX_EXT2_FS_H 525#ifndef _LINUX_EXT2_FS_H
467#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt 526#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt
@@ -481,6 +540,7 @@ do { \
481#define ext4_test_bit ext2_test_bit 540#define ext4_test_bit ext2_test_bit
482#define ext4_find_first_zero_bit ext2_find_first_zero_bit 541#define ext4_find_first_zero_bit ext2_find_first_zero_bit
483#define ext4_find_next_zero_bit ext2_find_next_zero_bit 542#define ext4_find_next_zero_bit ext2_find_next_zero_bit
543#define ext4_find_next_bit ext2_find_next_bit
484 544
485/* 545/*
486 * Maximal mount counts between two filesystem checks 546 * Maximal mount counts between two filesystem checks
@@ -671,6 +731,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
671#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 731#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
672#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 732#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
673#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 733#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
734#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
674#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 735#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
675#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 736#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
676#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 737#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
@@ -682,6 +743,7 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
682#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 743#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
683#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 744#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
684#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 745#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
746#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
685#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 747#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
686 748
687#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR 749#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
@@ -696,7 +758,8 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
696 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 758 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
697 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 759 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
698 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 760 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
699 EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 761 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
762 EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
700 763
701/* 764/*
702 * Default values for user and/or group using reserved blocks 765 * Default values for user and/or group using reserved blocks
@@ -767,6 +830,26 @@ struct ext4_dir_entry_2 {
767#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 830#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
768#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 831#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
769 ~EXT4_DIR_ROUND) 832 ~EXT4_DIR_ROUND)
833#define EXT4_MAX_REC_LEN ((1<<16)-1)
834
835static inline unsigned ext4_rec_len_from_disk(__le16 dlen)
836{
837 unsigned len = le16_to_cpu(dlen);
838
839 if (len == EXT4_MAX_REC_LEN)
840 return 1 << 16;
841 return len;
842}
843
844static inline __le16 ext4_rec_len_to_disk(unsigned len)
845{
846 if (len == (1 << 16))
847 return cpu_to_le16(EXT4_MAX_REC_LEN);
848 else if (len > (1 << 16))
849 BUG();
850 return cpu_to_le16(len);
851}
852
770/* 853/*
771 * Hash Tree Directory indexing 854 * Hash Tree Directory indexing
772 * (c) Daniel Phillips, 2001 855 * (c) Daniel Phillips, 2001
@@ -810,7 +893,7 @@ struct ext4_iloc
810{ 893{
811 struct buffer_head *bh; 894 struct buffer_head *bh;
812 unsigned long offset; 895 unsigned long offset;
813 unsigned long block_group; 896 ext4_group_t block_group;
814}; 897};
815 898
816static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 899static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
@@ -835,7 +918,7 @@ struct dir_private_info {
835 918
836/* calculate the first block number of the group */ 919/* calculate the first block number of the group */
837static inline ext4_fsblk_t 920static inline ext4_fsblk_t
838ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) 921ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
839{ 922{
840 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 923 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
841 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 924 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
@@ -866,21 +949,24 @@ extern unsigned int ext4_block_group(struct super_block *sb,
866 ext4_fsblk_t blocknr); 949 ext4_fsblk_t blocknr);
867extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 950extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
868 ext4_fsblk_t blocknr); 951 ext4_fsblk_t blocknr);
869extern int ext4_bg_has_super(struct super_block *sb, int group); 952extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
870extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); 953extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
954 ext4_group_t group);
871extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, 955extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
872 ext4_fsblk_t goal, int *errp); 956 ext4_fsblk_t goal, int *errp);
873extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, 957extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode,
874 ext4_fsblk_t goal, unsigned long *count, int *errp); 958 ext4_fsblk_t goal, unsigned long *count, int *errp);
959extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
960 ext4_fsblk_t goal, unsigned long *count, int *errp);
875extern void ext4_free_blocks (handle_t *handle, struct inode *inode, 961extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
876 ext4_fsblk_t block, unsigned long count); 962 ext4_fsblk_t block, unsigned long count, int metadata);
877extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, 963extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb,
878 ext4_fsblk_t block, unsigned long count, 964 ext4_fsblk_t block, unsigned long count,
879 unsigned long *pdquot_freed_blocks); 965 unsigned long *pdquot_freed_blocks);
880extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); 966extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *);
881extern void ext4_check_blocks_bitmap (struct super_block *); 967extern void ext4_check_blocks_bitmap (struct super_block *);
882extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 968extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
883 unsigned int block_group, 969 ext4_group_t block_group,
884 struct buffer_head ** bh); 970 struct buffer_head ** bh);
885extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 971extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
886extern void ext4_init_block_alloc_info(struct inode *); 972extern void ext4_init_block_alloc_info(struct inode *);
@@ -911,15 +997,32 @@ extern unsigned long ext4_count_dirs (struct super_block *);
911extern void ext4_check_inodes_bitmap (struct super_block *); 997extern void ext4_check_inodes_bitmap (struct super_block *);
912extern unsigned long ext4_count_free (struct buffer_head *, unsigned); 998extern unsigned long ext4_count_free (struct buffer_head *, unsigned);
913 999
1000/* mballoc.c */
1001extern long ext4_mb_stats;
1002extern long ext4_mb_max_to_scan;
1003extern int ext4_mb_init(struct super_block *, int);
1004extern int ext4_mb_release(struct super_block *);
1005extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
1006 struct ext4_allocation_request *, int *);
1007extern int ext4_mb_reserve_blocks(struct super_block *, int);
1008extern void ext4_mb_discard_inode_preallocations(struct inode *);
1009extern int __init init_ext4_mballoc(void);
1010extern void exit_ext4_mballoc(void);
1011extern void ext4_mb_free_blocks(handle_t *, struct inode *,
1012 unsigned long, unsigned long, int, unsigned long *);
1013
914 1014
915/* inode.c */ 1015/* inode.c */
916int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, 1016int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
917 struct buffer_head *bh, ext4_fsblk_t blocknr); 1017 struct buffer_head *bh, ext4_fsblk_t blocknr);
918struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *); 1018struct buffer_head *ext4_getblk(handle_t *, struct inode *,
919struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *); 1019 ext4_lblk_t, int, int *);
1020struct buffer_head *ext4_bread(handle_t *, struct inode *,
1021 ext4_lblk_t, int, int *);
920int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, 1022int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
921 sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, 1023 ext4_lblk_t iblock, unsigned long maxblocks,
922 int create, int extend_disksize); 1024 struct buffer_head *bh_result,
1025 int create, int extend_disksize);
923 1026
924extern void ext4_read_inode (struct inode *); 1027extern void ext4_read_inode (struct inode *);
925extern int ext4_write_inode (struct inode *, int); 1028extern int ext4_write_inode (struct inode *, int);
@@ -943,6 +1046,9 @@ extern int ext4_ioctl (struct inode *, struct file *, unsigned int,
943 unsigned long); 1046 unsigned long);
944extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long); 1047extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long);
945 1048
1049/* migrate.c */
1050extern int ext4_ext_migrate(struct inode *, struct file *, unsigned int,
1051 unsigned long);
946/* namei.c */ 1052/* namei.c */
947extern int ext4_orphan_add(handle_t *, struct inode *); 1053extern int ext4_orphan_add(handle_t *, struct inode *);
948extern int ext4_orphan_del(handle_t *, struct inode *); 1054extern int ext4_orphan_del(handle_t *, struct inode *);
@@ -965,6 +1071,12 @@ extern void ext4_abort (struct super_block *, const char *, const char *, ...)
965extern void ext4_warning (struct super_block *, const char *, const char *, ...) 1071extern void ext4_warning (struct super_block *, const char *, const char *, ...)
966 __attribute__ ((format (printf, 3, 4))); 1072 __attribute__ ((format (printf, 3, 4)));
967extern void ext4_update_dynamic_rev (struct super_block *sb); 1073extern void ext4_update_dynamic_rev (struct super_block *sb);
1074extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
1075 __u32 compat);
1076extern int ext4_update_rocompat_feature(handle_t *handle,
1077 struct super_block *sb, __u32 rocompat);
1078extern int ext4_update_incompat_feature(handle_t *handle,
1079 struct super_block *sb, __u32 incompat);
968extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1080extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
969 struct ext4_group_desc *bg); 1081 struct ext4_group_desc *bg);
970extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1082extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
@@ -1017,6 +1129,29 @@ static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
1017 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 1129 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
1018} 1130}
1019 1131
1132static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
1133{
1134 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
1135 le32_to_cpu(raw_inode->i_size_lo);
1136}
1137
1138static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
1139{
1140 raw_inode->i_size_lo = cpu_to_le32(i_size);
1141 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
1142}
1143
1144static inline
1145struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
1146 ext4_group_t group)
1147{
1148 struct ext4_group_info ***grp_info;
1149 long indexv, indexh;
1150 grp_info = EXT4_SB(sb)->s_group_info;
1151 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
1152 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
1153 return grp_info[indexv][indexh];
1154}
1020 1155
1021 1156
1022#define ext4_std_error(sb, errno) \ 1157#define ext4_std_error(sb, errno) \
@@ -1048,7 +1183,7 @@ extern const struct inode_operations ext4_fast_symlink_inode_operations;
1048extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 1183extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
1049extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 1184extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
1050extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, 1185extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
1051 ext4_fsblk_t iblock, 1186 ext4_lblk_t iblock,
1052 unsigned long max_blocks, struct buffer_head *bh_result, 1187 unsigned long max_blocks, struct buffer_head *bh_result,
1053 int create, int extend_disksize); 1188 int create, int extend_disksize);
1054extern void ext4_ext_truncate(struct inode *, struct page *); 1189extern void ext4_ext_truncate(struct inode *, struct page *);
@@ -1056,19 +1191,10 @@ extern void ext4_ext_init(struct super_block *);
1056extern void ext4_ext_release(struct super_block *); 1191extern void ext4_ext_release(struct super_block *);
1057extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, 1192extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
1058 loff_t len); 1193 loff_t len);
1059static inline int 1194extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode,
1060ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, 1195 sector_t block, unsigned long max_blocks,
1061 unsigned long max_blocks, struct buffer_head *bh, 1196 struct buffer_head *bh, int create,
1062 int create, int extend_disksize) 1197 int extend_disksize);
1063{
1064 if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)
1065 return ext4_ext_get_blocks(handle, inode, block, max_blocks,
1066 bh, create, extend_disksize);
1067 return ext4_get_blocks_handle(handle, inode, block, max_blocks, bh,
1068 create, extend_disksize);
1069}
1070
1071
1072#endif /* __KERNEL__ */ 1198#endif /* __KERNEL__ */
1073 1199
1074#endif /* _LINUX_EXT4_FS_H */ 1200#endif /* _LINUX_EXT4_FS_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-24 07:20:53 -0400