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16#ifndef _EXT4_H
17#define _EXT4_H
18
19#include <linux/types.h>
20#include <linux/blkdev.h>
21#include <linux/magic.h>
22#include <linux/jbd2.h>
23#include <linux/quota.h>
24#include <linux/rwsem.h>
25#include <linux/rbtree.h>
26#include <linux/seqlock.h>
27#include <linux/mutex.h>
28#include <linux/timer.h>
29#include <linux/wait.h>
30#include <linux/blockgroup_lock.h>
31#include <linux/percpu_counter.h>
32#include <crypto/hash.h>
33#ifdef __KERNEL__
34#include <linux/compat.h>
35#endif
36
37
38
39
40
41
42
43
44#undef EXT4FS_DEBUG
45
46
47
48
49#ifdef EXT4FS_DEBUG
50#define ext4_debug(f, a...) \
51 do { \
52 printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \
53 __FILE__, __LINE__, __func__); \
54 printk(KERN_DEBUG f, ## a); \
55 } while (0)
56#else
57#define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
58#endif
59
60
61
62
63#define EXT_DEBUG__
64#ifdef EXT_DEBUG
65#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
66#else
67#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
68#endif
69
70#define EXT4_ERROR_INODE(inode, fmt, a...) \
71 ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
72
73#define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \
74 ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a)
75
76#define EXT4_ERROR_FILE(file, block, fmt, a...) \
77 ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a)
78
79
80typedef int ext4_grpblk_t;
81
82
83typedef unsigned long long ext4_fsblk_t;
84
85
86typedef __u32 ext4_lblk_t;
87
88
89typedef unsigned int ext4_group_t;
90
91
92
93
94
95
96
97
98
99#define EXT4_MB_HINT_MERGE 0x0001
100
101#define EXT4_MB_HINT_RESERVED 0x0002
102
103#define EXT4_MB_HINT_METADATA 0x0004
104
105#define EXT4_MB_HINT_FIRST 0x0008
106
107#define EXT4_MB_HINT_BEST 0x0010
108
109#define EXT4_MB_HINT_DATA 0x0020
110
111#define EXT4_MB_HINT_NOPREALLOC 0x0040
112
113#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
114
115#define EXT4_MB_HINT_GOAL_ONLY 0x0100
116
117#define EXT4_MB_HINT_TRY_GOAL 0x0200
118
119#define EXT4_MB_DELALLOC_RESERVED 0x0400
120
121#define EXT4_MB_STREAM_ALLOC 0x0800
122
123#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
124
125#define EXT4_MB_USE_RESERVED 0x2000
126
127struct ext4_allocation_request {
128
129 struct inode *inode;
130
131 unsigned int len;
132
133 ext4_lblk_t logical;
134
135 ext4_lblk_t lleft;
136
137 ext4_lblk_t lright;
138
139 ext4_fsblk_t goal;
140
141 ext4_fsblk_t pleft;
142
143 ext4_fsblk_t pright;
144
145 unsigned int flags;
146};
147
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151
152
153
154
155#define EXT4_MAP_NEW (1 << BH_New)
156#define EXT4_MAP_MAPPED (1 << BH_Mapped)
157#define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten)
158#define EXT4_MAP_BOUNDARY (1 << BH_Boundary)
159#define EXT4_MAP_UNINIT (1 << BH_Uninit)
160
161
162
163
164
165
166
167#define EXT4_MAP_FROM_CLUSTER (1 << BH_AllocFromCluster)
168#define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
169 EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\
170 EXT4_MAP_UNINIT | EXT4_MAP_FROM_CLUSTER)
171
172struct ext4_map_blocks {
173 ext4_fsblk_t m_pblk;
174 ext4_lblk_t m_lblk;
175 unsigned int m_len;
176 unsigned int m_flags;
177};
178
179
180
181
182#define EXT4_IO_END_UNWRITTEN 0x0001
183#define EXT4_IO_END_DIRECT 0x0002
184
185
186
187
188
189typedef struct ext4_io_end {
190 struct list_head list;
191 handle_t *handle;
192
193 struct inode *inode;
194 struct bio *bio;
195
196 unsigned int flag;
197 loff_t offset;
198 ssize_t size;
199 struct kiocb *iocb;
200 int result;
201 atomic_t count;
202} ext4_io_end_t;
203
204struct ext4_io_submit {
205 int io_op;
206 struct bio *io_bio;
207 ext4_io_end_t *io_end;
208 sector_t io_next_block;
209};
210
211
212
213
214#define EXT4_BAD_INO 1
215#define EXT4_ROOT_INO 2
216#define EXT4_USR_QUOTA_INO 3
217#define EXT4_GRP_QUOTA_INO 4
218#define EXT4_BOOT_LOADER_INO 5
219#define EXT4_UNDEL_DIR_INO 6
220#define EXT4_RESIZE_INO 7
221#define EXT4_JOURNAL_INO 8
222
223
224#define EXT4_GOOD_OLD_FIRST_INO 11
225
226
227
228
229#define EXT4_LINK_MAX 65000
230
231
232
233
234#define EXT4_MIN_BLOCK_SIZE 1024
235#define EXT4_MAX_BLOCK_SIZE 65536
236#define EXT4_MIN_BLOCK_LOG_SIZE 10
237#define EXT4_MAX_BLOCK_LOG_SIZE 16
238#ifdef __KERNEL__
239# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
240#else
241# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
242#endif
243#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
244#define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \
245 EXT4_SB(s)->s_cluster_bits)
246#ifdef __KERNEL__
247# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
248# define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits)
249#else
250# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
251#endif
252#ifdef __KERNEL__
253#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits)
254#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size)
255#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino)
256#else
257#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
258 EXT4_GOOD_OLD_INODE_SIZE : \
259 (s)->s_inode_size)
260#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
261 EXT4_GOOD_OLD_FIRST_INO : \
262 (s)->s_first_ino)
263#endif
264#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
265
266
267#define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits)
268
269#define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits)
270
271#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \
272 (sbi)->s_cluster_bits)
273
274
275
276
277struct ext4_group_desc
278{
279 __le32 bg_block_bitmap_lo;
280 __le32 bg_inode_bitmap_lo;
281 __le32 bg_inode_table_lo;
282 __le16 bg_free_blocks_count_lo;
283 __le16 bg_free_inodes_count_lo;
284 __le16 bg_used_dirs_count_lo;
285 __le16 bg_flags;
286 __le32 bg_exclude_bitmap_lo;
287 __le16 bg_block_bitmap_csum_lo;
288 __le16 bg_inode_bitmap_csum_lo;
289 __le16 bg_itable_unused_lo;
290 __le16 bg_checksum;
291 __le32 bg_block_bitmap_hi;
292 __le32 bg_inode_bitmap_hi;
293 __le32 bg_inode_table_hi;
294 __le16 bg_free_blocks_count_hi;
295 __le16 bg_free_inodes_count_hi;
296 __le16 bg_used_dirs_count_hi;
297 __le16 bg_itable_unused_hi;
298 __le32 bg_exclude_bitmap_hi;
299 __le16 bg_block_bitmap_csum_hi;
300 __le16 bg_inode_bitmap_csum_hi;
301 __u32 bg_reserved;
302};
303
304#define EXT4_BG_INODE_BITMAP_CSUM_HI_END \
305 (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \
306 sizeof(__le16))
307#define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \
308 (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \
309 sizeof(__le16))
310
311
312
313
314
315struct flex_groups {
316 atomic64_t free_clusters;
317 atomic_t free_inodes;
318 atomic_t used_dirs;
319};
320
321#define EXT4_BG_INODE_UNINIT 0x0001
322#define EXT4_BG_BLOCK_UNINIT 0x0002
323#define EXT4_BG_INODE_ZEROED 0x0004
324
325
326
327
328#define EXT4_MIN_DESC_SIZE 32
329#define EXT4_MIN_DESC_SIZE_64BIT 64
330#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
331#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
332#ifdef __KERNEL__
333# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group)
334# define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group)
335# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block)
336# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group)
337# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits)
338#else
339# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
340# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
341# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
342#endif
343
344
345
346
347#define EXT4_NDIR_BLOCKS 12
348#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
349#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
350#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
351#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
352
353
354
355
356#define EXT4_SECRM_FL 0x00000001
357#define EXT4_UNRM_FL 0x00000002
358#define EXT4_COMPR_FL 0x00000004
359#define EXT4_SYNC_FL 0x00000008
360#define EXT4_IMMUTABLE_FL 0x00000010
361#define EXT4_APPEND_FL 0x00000020
362#define EXT4_NODUMP_FL 0x00000040
363#define EXT4_NOATIME_FL 0x00000080
364
365#define EXT4_DIRTY_FL 0x00000100
366#define EXT4_COMPRBLK_FL 0x00000200
367#define EXT4_NOCOMPR_FL 0x00000400
368#define EXT4_ECOMPR_FL 0x00000800
369
370#define EXT4_INDEX_FL 0x00001000
371#define EXT4_IMAGIC_FL 0x00002000
372#define EXT4_JOURNAL_DATA_FL 0x00004000
373#define EXT4_NOTAIL_FL 0x00008000
374#define EXT4_DIRSYNC_FL 0x00010000
375#define EXT4_TOPDIR_FL 0x00020000
376#define EXT4_HUGE_FILE_FL 0x00040000
377#define EXT4_EXTENTS_FL 0x00080000
378#define EXT4_EA_INODE_FL 0x00200000
379#define EXT4_EOFBLOCKS_FL 0x00400000
380#define EXT4_INLINE_DATA_FL 0x10000000
381#define EXT4_RESERVED_FL 0x80000000
382
383#define EXT4_FL_USER_VISIBLE 0x004BDFFF
384#define EXT4_FL_USER_MODIFIABLE 0x004380FF
385
386
387#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
388 EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
389 EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
390 EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
391
392
393#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
394
395
396#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
397
398
399static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
400{
401 if (S_ISDIR(mode))
402 return flags;
403 else if (S_ISREG(mode))
404 return flags & EXT4_REG_FLMASK;
405 else
406 return flags & EXT4_OTHER_FLMASK;
407}
408
409
410
411
412enum {
413 EXT4_INODE_SECRM = 0,
414 EXT4_INODE_UNRM = 1,
415 EXT4_INODE_COMPR = 2,
416 EXT4_INODE_SYNC = 3,
417 EXT4_INODE_IMMUTABLE = 4,
418 EXT4_INODE_APPEND = 5,
419 EXT4_INODE_NODUMP = 6,
420 EXT4_INODE_NOATIME = 7,
421
422 EXT4_INODE_DIRTY = 8,
423 EXT4_INODE_COMPRBLK = 9,
424 EXT4_INODE_NOCOMPR = 10,
425 EXT4_INODE_ECOMPR = 11,
426
427 EXT4_INODE_INDEX = 12,
428 EXT4_INODE_IMAGIC = 13,
429 EXT4_INODE_JOURNAL_DATA = 14,
430 EXT4_INODE_NOTAIL = 15,
431 EXT4_INODE_DIRSYNC = 16,
432 EXT4_INODE_TOPDIR = 17,
433 EXT4_INODE_HUGE_FILE = 18,
434 EXT4_INODE_EXTENTS = 19,
435 EXT4_INODE_EA_INODE = 21,
436 EXT4_INODE_EOFBLOCKS = 22,
437 EXT4_INODE_INLINE_DATA = 28,
438 EXT4_INODE_RESERVED = 31,
439};
440
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451
452
453
454#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
455#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
456
457static inline void ext4_check_flag_values(void)
458{
459 CHECK_FLAG_VALUE(SECRM);
460 CHECK_FLAG_VALUE(UNRM);
461 CHECK_FLAG_VALUE(COMPR);
462 CHECK_FLAG_VALUE(SYNC);
463 CHECK_FLAG_VALUE(IMMUTABLE);
464 CHECK_FLAG_VALUE(APPEND);
465 CHECK_FLAG_VALUE(NODUMP);
466 CHECK_FLAG_VALUE(NOATIME);
467 CHECK_FLAG_VALUE(DIRTY);
468 CHECK_FLAG_VALUE(COMPRBLK);
469 CHECK_FLAG_VALUE(NOCOMPR);
470 CHECK_FLAG_VALUE(ECOMPR);
471 CHECK_FLAG_VALUE(INDEX);
472 CHECK_FLAG_VALUE(IMAGIC);
473 CHECK_FLAG_VALUE(JOURNAL_DATA);
474 CHECK_FLAG_VALUE(NOTAIL);
475 CHECK_FLAG_VALUE(DIRSYNC);
476 CHECK_FLAG_VALUE(TOPDIR);
477 CHECK_FLAG_VALUE(HUGE_FILE);
478 CHECK_FLAG_VALUE(EXTENTS);
479 CHECK_FLAG_VALUE(EA_INODE);
480 CHECK_FLAG_VALUE(EOFBLOCKS);
481 CHECK_FLAG_VALUE(INLINE_DATA);
482 CHECK_FLAG_VALUE(RESERVED);
483}
484
485
486struct ext4_new_group_input {
487 __u32 group;
488 __u64 block_bitmap;
489 __u64 inode_bitmap;
490 __u64 inode_table;
491 __u32 blocks_count;
492 __u16 reserved_blocks;
493 __u16 unused;
494};
495
496#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
497struct compat_ext4_new_group_input {
498 u32 group;
499 compat_u64 block_bitmap;
500 compat_u64 inode_bitmap;
501 compat_u64 inode_table;
502 u32 blocks_count;
503 u16 reserved_blocks;
504 u16 unused;
505};
506#endif
507
508
509struct ext4_new_group_data {
510 __u32 group;
511 __u64 block_bitmap;
512 __u64 inode_bitmap;
513 __u64 inode_table;
514 __u32 blocks_count;
515 __u16 reserved_blocks;
516 __u16 unused;
517 __u32 free_blocks_count;
518};
519
520
521enum {
522 BLOCK_BITMAP = 0,
523 INODE_BITMAP,
524 INODE_TABLE,
525 GROUP_TABLE_COUNT,
526};
527
528
529
530
531
532
533#define EXT4_GET_BLOCKS_CREATE 0x0001
534
535#define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002
536#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\
537 EXT4_GET_BLOCKS_CREATE)
538
539
540#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
541
542
543
544#define EXT4_GET_BLOCKS_PRE_IO 0x0008
545#define EXT4_GET_BLOCKS_CONVERT 0x0010
546#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
547 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
548
549#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
550 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
551
552
553#define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020
554
555#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
556
557#define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080
558
559#define EXT4_GET_BLOCKS_NO_LOCK 0x0100
560
561#define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200
562
563
564
565
566#define EXT4_FREE_BLOCKS_METADATA 0x0001
567#define EXT4_FREE_BLOCKS_FORGET 0x0002
568#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
569#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
570#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010
571#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020
572
573
574
575
576#define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS
577#define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS
578#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
579#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
580#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
581#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
582#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
583#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
584#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
585#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
586#define EXT4_IOC_MIGRATE _IO('f', 9)
587
588
589#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
590#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
591#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
592#define EXT4_IOC_SWAP_BOOT _IO('f', 17)
593
594#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
595
596
597
598#define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS
599#define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS
600#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
601#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
602#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
603#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
604#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
605#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input)
606#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
607#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
608#endif
609
610
611#define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
612
613
614
615
616struct ext4_inode {
617 __le16 i_mode;
618 __le16 i_uid;
619 __le32 i_size_lo;
620 __le32 i_atime;
621 __le32 i_ctime;
622 __le32 i_mtime;
623 __le32 i_dtime;
624 __le16 i_gid;
625 __le16 i_links_count;
626 __le32 i_blocks_lo;
627 __le32 i_flags;
628 union {
629 struct {
630 __le32 l_i_version;
631 } linux1;
632 struct {
633 __u32 h_i_translator;
634 } hurd1;
635 struct {
636 __u32 m_i_reserved1;
637 } masix1;
638 } osd1;
639 __le32 i_block[EXT4_N_BLOCKS];
640 __le32 i_generation;
641 __le32 i_file_acl_lo;
642 __le32 i_size_high;
643 __le32 i_obso_faddr;
644 union {
645 struct {
646 __le16 l_i_blocks_high;
647 __le16 l_i_file_acl_high;
648 __le16 l_i_uid_high;
649 __le16 l_i_gid_high;
650 __le16 l_i_checksum_lo;
651 __le16 l_i_reserved;
652 } linux2;
653 struct {
654 __le16 h_i_reserved1;
655 __u16 h_i_mode_high;
656 __u16 h_i_uid_high;
657 __u16 h_i_gid_high;
658 __u32 h_i_author;
659 } hurd2;
660 struct {
661 __le16 h_i_reserved1;
662 __le16 m_i_file_acl_high;
663 __u32 m_i_reserved2[2];
664 } masix2;
665 } osd2;
666 __le16 i_extra_isize;
667 __le16 i_checksum_hi;
668 __le32 i_ctime_extra;
669 __le32 i_mtime_extra;
670 __le32 i_atime_extra;
671 __le32 i_crtime;
672 __le32 i_crtime_extra;
673 __le32 i_version_hi;
674};
675
676struct move_extent {
677 __u32 reserved;
678 __u32 donor_fd;
679 __u64 orig_start;
680 __u64 donor_start;
681 __u64 len;
682 __u64 moved_len;
683};
684
685#define EXT4_EPOCH_BITS 2
686#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
687#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
688
689
690
691
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693
694
695
696
697
698
699#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \
700 ((offsetof(typeof(*ext4_inode), field) + \
701 sizeof((ext4_inode)->field)) \
702 <= (EXT4_GOOD_OLD_INODE_SIZE + \
703 (einode)->i_extra_isize)) \
704
705static inline __le32 ext4_encode_extra_time(struct timespec *time)
706{
707 return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
708 (time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) |
709 ((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK));
710}
711
712static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
713{
714 if (sizeof(time->tv_sec) > 4)
715 time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
716 << 32;
717 time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
718}
719
720#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
721do { \
722 (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
723 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
724 (raw_inode)->xtime ## _extra = \
725 ext4_encode_extra_time(&(inode)->xtime); \
726} while (0)
727
728#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
729do { \
730 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
731 (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \
732 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
733 (raw_inode)->xtime ## _extra = \
734 ext4_encode_extra_time(&(einode)->xtime); \
735} while (0)
736
737#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \
738do { \
739 (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \
740 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
741 ext4_decode_extra_time(&(inode)->xtime, \
742 raw_inode->xtime ## _extra); \
743 else \
744 (inode)->xtime.tv_nsec = 0; \
745} while (0)
746
747#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \
748do { \
749 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
750 (einode)->xtime.tv_sec = \
751 (signed)le32_to_cpu((raw_inode)->xtime); \
752 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
753 ext4_decode_extra_time(&(einode)->xtime, \
754 raw_inode->xtime ## _extra); \
755 else \
756 (einode)->xtime.tv_nsec = 0; \
757} while (0)
758
759#define i_disk_version osd1.linux1.l_i_version
760
761#if defined(__KERNEL__) || defined(__linux__)
762#define i_reserved1 osd1.linux1.l_i_reserved1
763#define i_file_acl_high osd2.linux2.l_i_file_acl_high
764#define i_blocks_high osd2.linux2.l_i_blocks_high
765#define i_uid_low i_uid
766#define i_gid_low i_gid
767#define i_uid_high osd2.linux2.l_i_uid_high
768#define i_gid_high osd2.linux2.l_i_gid_high
769#define i_checksum_lo osd2.linux2.l_i_checksum_lo
770
771#elif defined(__GNU__)
772
773#define i_translator osd1.hurd1.h_i_translator
774#define i_uid_high osd2.hurd2.h_i_uid_high
775#define i_gid_high osd2.hurd2.h_i_gid_high
776#define i_author osd2.hurd2.h_i_author
777
778#elif defined(__masix__)
779
780#define i_reserved1 osd1.masix1.m_i_reserved1
781#define i_file_acl_high osd2.masix2.m_i_file_acl_high
782#define i_reserved2 osd2.masix2.m_i_reserved2
783
784#endif
785
786#include "extents_status.h"
787
788
789
790
791struct ext4_inode_info {
792 __le32 i_data[15];
793 __u32 i_dtime;
794 ext4_fsblk_t i_file_acl;
795
796
797
798
799
800
801
802
803 ext4_group_t i_block_group;
804 ext4_lblk_t i_dir_start_lookup;
805#if (BITS_PER_LONG < 64)
806 unsigned long i_state_flags;
807#endif
808 unsigned long i_flags;
809
810
811
812
813
814
815
816
817 struct rw_semaphore xattr_sem;
818
819 struct list_head i_orphan;
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836 loff_t i_disksize;
837
838
839
840
841
842
843
844
845
846
847
848 struct rw_semaphore i_data_sem;
849 struct inode vfs_inode;
850 struct jbd2_inode *jinode;
851
852
853
854
855
856 struct timespec i_crtime;
857
858
859 struct list_head i_prealloc_list;
860 spinlock_t i_prealloc_lock;
861
862
863 struct ext4_es_tree i_es_tree;
864 rwlock_t i_es_lock;
865 struct list_head i_es_lru;
866 unsigned int i_es_lru_nr;
867 unsigned long i_touch_when;
868
869
870 ext4_group_t i_last_alloc_group;
871
872
873
874 unsigned int i_reserved_data_blocks;
875 unsigned int i_reserved_meta_blocks;
876 unsigned int i_allocated_meta_blocks;
877 ext4_lblk_t i_da_metadata_calc_last_lblock;
878 int i_da_metadata_calc_len;
879
880
881 __u16 i_extra_isize;
882
883
884 u16 i_inline_off;
885 u16 i_inline_size;
886
887#ifdef CONFIG_QUOTA
888
889 qsize_t i_reserved_quota;
890#endif
891
892
893 spinlock_t i_completed_io_lock;
894
895
896
897
898 struct list_head i_rsv_conversion_list;
899
900
901
902
903 struct list_head i_unrsv_conversion_list;
904 atomic_t i_ioend_count;
905 atomic_t i_unwritten;
906 struct work_struct i_rsv_conversion_work;
907 struct work_struct i_unrsv_conversion_work;
908
909 spinlock_t i_block_reservation_lock;
910
911
912
913
914
915 tid_t i_sync_tid;
916 tid_t i_datasync_tid;
917
918
919 __u32 i_csum_seed;
920};
921
922
923
924
925#define EXT4_VALID_FS 0x0001
926#define EXT4_ERROR_FS 0x0002
927#define EXT4_ORPHAN_FS 0x0004
928
929
930
931
932#define EXT2_FLAGS_SIGNED_HASH 0x0001
933#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
934#define EXT2_FLAGS_TEST_FILESYS 0x0004
935
936
937
938
939#define EXT4_MOUNT_GRPID 0x00004
940#define EXT4_MOUNT_DEBUG 0x00008
941#define EXT4_MOUNT_ERRORS_CONT 0x00010
942#define EXT4_MOUNT_ERRORS_RO 0x00020
943#define EXT4_MOUNT_ERRORS_PANIC 0x00040
944#define EXT4_MOUNT_ERRORS_MASK 0x00070
945#define EXT4_MOUNT_MINIX_DF 0x00080
946#define EXT4_MOUNT_NOLOAD 0x00100
947#define EXT4_MOUNT_DATA_FLAGS 0x00C00
948#define EXT4_MOUNT_JOURNAL_DATA 0x00400
949#define EXT4_MOUNT_ORDERED_DATA 0x00800
950#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
951#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
952#define EXT4_MOUNT_NO_UID32 0x02000
953#define EXT4_MOUNT_XATTR_USER 0x04000
954#define EXT4_MOUNT_POSIX_ACL 0x08000
955#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
956#define EXT4_MOUNT_BARRIER 0x20000
957#define EXT4_MOUNT_QUOTA 0x80000
958#define EXT4_MOUNT_USRQUOTA 0x100000
959#define EXT4_MOUNT_GRPQUOTA 0x200000
960#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
961#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
962#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
963#define EXT4_MOUNT_DELALLOC 0x8000000
964#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
965#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
966#define EXT4_MOUNT_DISCARD 0x40000000
967#define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000
968
969
970
971
972
973
974#define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001
975
976#define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002
977
978
979
980#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \
981 ~EXT4_MOUNT_##opt
982#define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \
983 EXT4_MOUNT_##opt
984#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \
985 EXT4_MOUNT_##opt)
986
987#define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \
988 ~EXT4_MOUNT2_##opt
989#define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \
990 EXT4_MOUNT2_##opt
991#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \
992 EXT4_MOUNT2_##opt)
993
994#define ext4_test_and_set_bit __test_and_set_bit_le
995#define ext4_set_bit __set_bit_le
996#define ext4_set_bit_atomic ext2_set_bit_atomic
997#define ext4_test_and_clear_bit __test_and_clear_bit_le
998#define ext4_clear_bit __clear_bit_le
999#define ext4_clear_bit_atomic ext2_clear_bit_atomic
1000#define ext4_test_bit test_bit_le
1001#define ext4_find_next_zero_bit find_next_zero_bit_le
1002#define ext4_find_next_bit find_next_bit_le
1003
1004extern void ext4_set_bits(void *bm, int cur, int len);
1005
1006
1007
1008
1009#define EXT4_DFL_MAX_MNT_COUNT 20
1010#define EXT4_DFL_CHECKINTERVAL 0
1011
1012
1013
1014
1015#define EXT4_ERRORS_CONTINUE 1
1016#define EXT4_ERRORS_RO 2
1017#define EXT4_ERRORS_PANIC 3
1018#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
1019
1020
1021#define EXT4_CRC32C_CHKSUM 1
1022
1023
1024
1025
1026struct ext4_super_block {
1027 __le32 s_inodes_count;
1028 __le32 s_blocks_count_lo;
1029 __le32 s_r_blocks_count_lo;
1030 __le32 s_free_blocks_count_lo;
1031 __le32 s_free_inodes_count;
1032 __le32 s_first_data_block;
1033 __le32 s_log_block_size;
1034 __le32 s_log_cluster_size;
1035 __le32 s_blocks_per_group;
1036 __le32 s_clusters_per_group;
1037 __le32 s_inodes_per_group;
1038 __le32 s_mtime;
1039 __le32 s_wtime;
1040 __le16 s_mnt_count;
1041 __le16 s_max_mnt_count;
1042 __le16 s_magic;
1043 __le16 s_state;
1044 __le16 s_errors;
1045 __le16 s_minor_rev_level;
1046 __le32 s_lastcheck;
1047 __le32 s_checkinterval;
1048 __le32 s_creator_os;
1049 __le32 s_rev_level;
1050 __le16 s_def_resuid;
1051 __le16 s_def_resgid;
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065 __le32 s_first_ino;
1066 __le16 s_inode_size;
1067 __le16 s_block_group_nr;
1068 __le32 s_feature_compat;
1069 __le32 s_feature_incompat;
1070 __le32 s_feature_ro_compat;
1071 __u8 s_uuid[16];
1072 char s_volume_name[16];
1073 char s_last_mounted[64];
1074 __le32 s_algorithm_usage_bitmap;
1075
1076
1077
1078
1079 __u8 s_prealloc_blocks;
1080 __u8 s_prealloc_dir_blocks;
1081 __le16 s_reserved_gdt_blocks;
1082
1083
1084
1085 __u8 s_journal_uuid[16];
1086 __le32 s_journal_inum;
1087 __le32 s_journal_dev;
1088 __le32 s_last_orphan;
1089 __le32 s_hash_seed[4];
1090 __u8 s_def_hash_version;
1091 __u8 s_jnl_backup_type;
1092 __le16 s_desc_size;
1093 __le32 s_default_mount_opts;
1094 __le32 s_first_meta_bg;
1095 __le32 s_mkfs_time;
1096 __le32 s_jnl_blocks[17];
1097
1098 __le32 s_blocks_count_hi;
1099 __le32 s_r_blocks_count_hi;
1100 __le32 s_free_blocks_count_hi;
1101 __le16 s_min_extra_isize;
1102 __le16 s_want_extra_isize;
1103 __le32 s_flags;
1104 __le16 s_raid_stride;
1105 __le16 s_mmp_update_interval;
1106 __le64 s_mmp_block;
1107 __le32 s_raid_stripe_width;
1108 __u8 s_log_groups_per_flex;
1109 __u8 s_checksum_type;
1110 __le16 s_reserved_pad;
1111 __le64 s_kbytes_written;
1112 __le32 s_snapshot_inum;
1113 __le32 s_snapshot_id;
1114 __le64 s_snapshot_r_blocks_count;
1115
1116 __le32 s_snapshot_list;
1117
1118#define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count)
1119 __le32 s_error_count;
1120 __le32 s_first_error_time;
1121 __le32 s_first_error_ino;
1122 __le64 s_first_error_block;
1123 __u8 s_first_error_func[32];
1124 __le32 s_first_error_line;
1125 __le32 s_last_error_time;
1126 __le32 s_last_error_ino;
1127 __le32 s_last_error_line;
1128 __le64 s_last_error_block;
1129 __u8 s_last_error_func[32];
1130#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
1131 __u8 s_mount_opts[64];
1132 __le32 s_usr_quota_inum;
1133 __le32 s_grp_quota_inum;
1134 __le32 s_overhead_clusters;
1135 __le32 s_reserved[108];
1136 __le32 s_checksum;
1137};
1138
1139#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
1140
1141#ifdef __KERNEL__
1142
1143
1144
1145
1146#define EXT4_MF_MNTDIR_SAMPLED 0x0001
1147#define EXT4_MF_FS_ABORTED 0x0002
1148
1149
1150
1151
1152struct ext4_sb_info {
1153 unsigned long s_desc_size;
1154 unsigned long s_inodes_per_block;
1155 unsigned long s_blocks_per_group;
1156 unsigned long s_clusters_per_group;
1157 unsigned long s_inodes_per_group;
1158 unsigned long s_itb_per_group;
1159 unsigned long s_gdb_count;
1160 unsigned long s_desc_per_block;
1161 ext4_group_t s_groups_count;
1162 ext4_group_t s_blockfile_groups;
1163 unsigned long s_overhead;
1164 unsigned int s_cluster_ratio;
1165 unsigned int s_cluster_bits;
1166 loff_t s_bitmap_maxbytes;
1167 struct buffer_head * s_sbh;
1168 struct ext4_super_block *s_es;
1169 struct buffer_head **s_group_desc;
1170 unsigned int s_mount_opt;
1171 unsigned int s_mount_opt2;
1172 unsigned int s_mount_flags;
1173 unsigned int s_def_mount_opt;
1174 ext4_fsblk_t s_sb_block;
1175 atomic64_t s_resv_clusters;
1176 kuid_t s_resuid;
1177 kgid_t s_resgid;
1178 unsigned short s_mount_state;
1179 unsigned short s_pad;
1180 int s_addr_per_block_bits;
1181 int s_desc_per_block_bits;
1182 int s_inode_size;
1183 int s_first_ino;
1184 unsigned int s_inode_readahead_blks;
1185 unsigned int s_inode_goal;
1186 spinlock_t s_next_gen_lock;
1187 u32 s_next_generation;
1188 u32 s_hash_seed[4];
1189 int s_def_hash_version;
1190 int s_hash_unsigned;
1191 struct percpu_counter s_freeclusters_counter;
1192 struct percpu_counter s_freeinodes_counter;
1193 struct percpu_counter s_dirs_counter;
1194 struct percpu_counter s_dirtyclusters_counter;
1195 struct blockgroup_lock *s_blockgroup_lock;
1196 struct proc_dir_entry *s_proc;
1197 struct kobject s_kobj;
1198 struct completion s_kobj_unregister;
1199 struct super_block *s_sb;
1200
1201
1202 struct journal_s *s_journal;
1203 struct list_head s_orphan;
1204 struct mutex s_orphan_lock;
1205 unsigned long s_resize_flags;
1206
1207 unsigned long s_commit_interval;
1208 u32 s_max_batch_time;
1209 u32 s_min_batch_time;
1210 struct block_device *journal_bdev;
1211#ifdef CONFIG_QUOTA
1212 char *s_qf_names[MAXQUOTAS];
1213 int s_jquota_fmt;
1214#endif
1215 unsigned int s_want_extra_isize;
1216 struct rb_root system_blks;
1217
1218#ifdef EXTENTS_STATS
1219
1220 unsigned long s_ext_min;
1221 unsigned long s_ext_max;
1222 unsigned long s_depth_max;
1223 spinlock_t s_ext_stats_lock;
1224 unsigned long s_ext_blocks;
1225 unsigned long s_ext_extents;
1226#endif
1227
1228
1229 struct ext4_group_info ***s_group_info;
1230 struct inode *s_buddy_cache;
1231 spinlock_t s_md_lock;
1232 unsigned short *s_mb_offsets;
1233 unsigned int *s_mb_maxs;
1234 unsigned int s_group_info_size;
1235
1236
1237 unsigned long s_stripe;
1238 unsigned int s_mb_stream_request;
1239 unsigned int s_mb_max_to_scan;
1240 unsigned int s_mb_min_to_scan;
1241 unsigned int s_mb_stats;
1242 unsigned int s_mb_order2_reqs;
1243 unsigned int s_mb_group_prealloc;
1244 unsigned int s_max_dir_size_kb;
1245
1246 unsigned long s_mb_last_group;
1247 unsigned long s_mb_last_start;
1248
1249
1250 atomic_t s_bal_reqs;
1251 atomic_t s_bal_success;
1252 atomic_t s_bal_allocated;
1253 atomic_t s_bal_ex_scanned;
1254 atomic_t s_bal_goals;
1255 atomic_t s_bal_breaks;
1256 atomic_t s_bal_2orders;
1257 spinlock_t s_bal_lock;
1258 unsigned long s_mb_buddies_generated;
1259 unsigned long long s_mb_generation_time;
1260 atomic_t s_mb_lost_chunks;
1261 atomic_t s_mb_preallocated;
1262 atomic_t s_mb_discarded;
1263 atomic_t s_lock_busy;
1264
1265
1266 struct ext4_locality_group __percpu *s_locality_groups;
1267
1268
1269 unsigned long s_sectors_written_start;
1270 u64 s_kbytes_written;
1271
1272
1273 unsigned int s_extent_max_zeroout_kb;
1274
1275 unsigned int s_log_groups_per_flex;
1276 struct flex_groups *s_flex_groups;
1277 ext4_group_t s_flex_groups_allocated;
1278
1279
1280 struct workqueue_struct *unrsv_conversion_wq;
1281
1282 struct workqueue_struct *rsv_conversion_wq;
1283
1284
1285 struct timer_list s_err_report;
1286
1287
1288 struct ext4_li_request *s_li_request;
1289
1290 unsigned int s_li_wait_mult;
1291
1292
1293 struct task_struct *s_mmp_tsk;
1294
1295
1296 atomic_t s_last_trim_minblks;
1297
1298
1299 struct crypto_shash *s_chksum_driver;
1300
1301
1302 __u32 s_csum_seed;
1303
1304
1305 struct shrinker s_es_shrinker;
1306 struct list_head s_es_lru;
1307 unsigned long s_es_last_sorted;
1308 struct percpu_counter s_extent_cache_cnt;
1309 spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
1310};
1311
1312static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1313{
1314 return sb->s_fs_info;
1315}
1316static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1317{
1318 return container_of(inode, struct ext4_inode_info, vfs_inode);
1319}
1320
1321static inline struct timespec ext4_current_time(struct inode *inode)
1322{
1323 return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
1324 current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
1325}
1326
1327static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
1328{
1329 return ino == EXT4_ROOT_INO ||
1330 ino == EXT4_USR_QUOTA_INO ||
1331 ino == EXT4_GRP_QUOTA_INO ||
1332 ino == EXT4_BOOT_LOADER_INO ||
1333 ino == EXT4_JOURNAL_INO ||
1334 ino == EXT4_RESIZE_INO ||
1335 (ino >= EXT4_FIRST_INO(sb) &&
1336 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
1337}
1338
1339static inline void ext4_set_io_unwritten_flag(struct inode *inode,
1340 struct ext4_io_end *io_end)
1341{
1342 if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
1343
1344 WARN_ON(EXT4_SB(inode->i_sb)->s_journal && !io_end->handle &&
1345 !(io_end->flag & EXT4_IO_END_DIRECT));
1346 io_end->flag |= EXT4_IO_END_UNWRITTEN;
1347 atomic_inc(&EXT4_I(inode)->i_unwritten);
1348 }
1349}
1350
1351static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode)
1352{
1353 return inode->i_private;
1354}
1355
1356static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io)
1357{
1358 inode->i_private = io;
1359}
1360
1361
1362
1363
1364enum {
1365 EXT4_STATE_JDATA,
1366 EXT4_STATE_NEW,
1367 EXT4_STATE_XATTR,
1368 EXT4_STATE_NO_EXPAND,
1369 EXT4_STATE_DA_ALLOC_CLOSE,
1370 EXT4_STATE_EXT_MIGRATE,
1371 EXT4_STATE_DIO_UNWRITTEN,
1372 EXT4_STATE_NEWENTRY,
1373 EXT4_STATE_DELALLOC_RESERVED,
1374 EXT4_STATE_DIOREAD_LOCK,
1375
1376 EXT4_STATE_MAY_INLINE_DATA,
1377 EXT4_STATE_ORDERED_MODE,
1378};
1379
1380#define EXT4_INODE_BIT_FNS(name, field, offset) \
1381static inline int ext4_test_inode_##name(struct inode *inode, int bit) \
1382{ \
1383 return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1384} \
1385static inline void ext4_set_inode_##name(struct inode *inode, int bit) \
1386{ \
1387 set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1388} \
1389static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
1390{ \
1391 clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1392}
1393
1394EXT4_INODE_BIT_FNS(flag, flags, 0)
1395#if (BITS_PER_LONG < 64)
1396EXT4_INODE_BIT_FNS(state, state_flags, 0)
1397
1398static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1399{
1400 (ei)->i_state_flags = 0;
1401}
1402#else
1403EXT4_INODE_BIT_FNS(state, flags, 32)
1404
1405static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1406{
1407
1408}
1409#endif
1410#else
1411
1412
1413
1414#define EXT4_SB(sb) (sb)
1415#endif
1416
1417#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
1418
1419
1420
1421
1422#define EXT4_OS_LINUX 0
1423#define EXT4_OS_HURD 1
1424#define EXT4_OS_MASIX 2
1425#define EXT4_OS_FREEBSD 3
1426#define EXT4_OS_LITES 4
1427
1428
1429
1430
1431#define EXT4_GOOD_OLD_REV 0
1432#define EXT4_DYNAMIC_REV 1
1433
1434#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
1435#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
1436
1437#define EXT4_GOOD_OLD_INODE_SIZE 128
1438
1439
1440
1441
1442
1443#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
1444 ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
1445#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
1446 ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0)
1447#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \
1448 ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0)
1449#define EXT4_SET_COMPAT_FEATURE(sb,mask) \
1450 EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
1451#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \
1452 EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
1453#define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \
1454 EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
1455#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \
1456 EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
1457#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
1458 EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
1459#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \
1460 EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
1461
1462#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
1463#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
1464#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
1465#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
1466#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
1467#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
1468
1469#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1470#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
1471#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
1472#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
1473#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1474#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
1475#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
1476#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
1477#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
1478
1479
1480
1481
1482
1483
1484#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
1485
1486#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
1487#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
1488#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
1489#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
1490#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
1491#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
1492#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
1493#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
1494#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
1495#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
1496#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
1497#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000
1498#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000
1499#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000
1500
1501#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1502#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1503 EXT4_FEATURE_INCOMPAT_META_BG)
1504#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1505 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1506 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1507
1508#define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1509#define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1510 EXT4_FEATURE_INCOMPAT_RECOVER| \
1511 EXT4_FEATURE_INCOMPAT_META_BG)
1512#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1513 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1514 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1515
1516#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
1517#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1518 EXT4_FEATURE_INCOMPAT_RECOVER| \
1519 EXT4_FEATURE_INCOMPAT_META_BG| \
1520 EXT4_FEATURE_INCOMPAT_EXTENTS| \
1521 EXT4_FEATURE_INCOMPAT_64BIT| \
1522 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
1523 EXT4_FEATURE_INCOMPAT_MMP | \
1524 EXT4_FEATURE_INCOMPAT_INLINE_DATA)
1525#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1526 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1527 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
1528 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
1529 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
1530 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
1531 EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
1532 EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
1533 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
1534 EXT4_FEATURE_RO_COMPAT_QUOTA)
1535
1536
1537
1538
1539#define EXT4_DEF_RESUID 0
1540#define EXT4_DEF_RESGID 0
1541
1542#define EXT4_DEF_INODE_READAHEAD_BLKS 32
1543
1544
1545
1546
1547#define EXT4_DEFM_DEBUG 0x0001
1548#define EXT4_DEFM_BSDGROUPS 0x0002
1549#define EXT4_DEFM_XATTR_USER 0x0004
1550#define EXT4_DEFM_ACL 0x0008
1551#define EXT4_DEFM_UID16 0x0010
1552#define EXT4_DEFM_JMODE 0x0060
1553#define EXT4_DEFM_JMODE_DATA 0x0020
1554#define EXT4_DEFM_JMODE_ORDERED 0x0040
1555#define EXT4_DEFM_JMODE_WBACK 0x0060
1556#define EXT4_DEFM_NOBARRIER 0x0100
1557#define EXT4_DEFM_BLOCK_VALIDITY 0x0200
1558#define EXT4_DEFM_DISCARD 0x0400
1559#define EXT4_DEFM_NODELALLOC 0x0800
1560
1561
1562
1563
1564#define EXT4_DEF_MIN_BATCH_TIME 0
1565#define EXT4_DEF_MAX_BATCH_TIME 15000
1566
1567
1568
1569
1570
1571#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
1572
1573
1574
1575
1576#define EXT4_NAME_LEN 255
1577
1578struct ext4_dir_entry {
1579 __le32 inode;
1580 __le16 rec_len;
1581 __le16 name_len;
1582 char name[EXT4_NAME_LEN];
1583};
1584
1585
1586
1587
1588
1589
1590
1591struct ext4_dir_entry_2 {
1592 __le32 inode;
1593 __le16 rec_len;
1594 __u8 name_len;
1595 __u8 file_type;
1596 char name[EXT4_NAME_LEN];
1597};
1598
1599
1600
1601
1602
1603struct ext4_dir_entry_tail {
1604 __le32 det_reserved_zero1;
1605 __le16 det_rec_len;
1606 __u8 det_reserved_zero2;
1607 __u8 det_reserved_ft;
1608 __le32 det_checksum;
1609};
1610
1611#define EXT4_DIRENT_TAIL(block, blocksize) \
1612 ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
1613 ((blocksize) - \
1614 sizeof(struct ext4_dir_entry_tail))))
1615
1616
1617
1618
1619
1620#define EXT4_FT_UNKNOWN 0
1621#define EXT4_FT_REG_FILE 1
1622#define EXT4_FT_DIR 2
1623#define EXT4_FT_CHRDEV 3
1624#define EXT4_FT_BLKDEV 4
1625#define EXT4_FT_FIFO 5
1626#define EXT4_FT_SOCK 6
1627#define EXT4_FT_SYMLINK 7
1628
1629#define EXT4_FT_MAX 8
1630
1631#define EXT4_FT_DIR_CSUM 0xDE
1632
1633
1634
1635
1636
1637
1638#define EXT4_DIR_PAD 4
1639#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
1640#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
1641 ~EXT4_DIR_ROUND)
1642#define EXT4_MAX_REC_LEN ((1<<16)-1)
1643
1644
1645
1646
1647
1648static inline unsigned int
1649ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
1650{
1651 unsigned len = le16_to_cpu(dlen);
1652
1653#if (PAGE_CACHE_SIZE >= 65536)
1654 if (len == EXT4_MAX_REC_LEN || len == 0)
1655 return blocksize;
1656 return (len & 65532) | ((len & 3) << 16);
1657#else
1658 return len;
1659#endif
1660}
1661
1662static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
1663{
1664 if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
1665 BUG();
1666#if (PAGE_CACHE_SIZE >= 65536)
1667 if (len < 65536)
1668 return cpu_to_le16(len);
1669 if (len == blocksize) {
1670 if (blocksize == 65536)
1671 return cpu_to_le16(EXT4_MAX_REC_LEN);
1672 else
1673 return cpu_to_le16(0);
1674 }
1675 return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
1676#else
1677 return cpu_to_le16(len);
1678#endif
1679}
1680
1681
1682
1683
1684
1685
1686#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
1687 EXT4_FEATURE_COMPAT_DIR_INDEX) && \
1688 ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
1689#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
1690#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
1691
1692
1693
1694#define DX_HASH_LEGACY 0
1695#define DX_HASH_HALF_MD4 1
1696#define DX_HASH_TEA 2
1697#define DX_HASH_LEGACY_UNSIGNED 3
1698#define DX_HASH_HALF_MD4_UNSIGNED 4
1699#define DX_HASH_TEA_UNSIGNED 5
1700
1701static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc,
1702 const void *address, unsigned int length)
1703{
1704 struct {
1705 struct shash_desc shash;
1706 char ctx[4];
1707 } desc;
1708 int err;
1709
1710 BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx));
1711
1712 desc.shash.tfm = sbi->s_chksum_driver;
1713 desc.shash.flags = 0;
1714 *(u32 *)desc.ctx = crc;
1715
1716 err = crypto_shash_update(&desc.shash, address, length);
1717 BUG_ON(err);
1718
1719 return *(u32 *)desc.ctx;
1720}
1721
1722#ifdef __KERNEL__
1723
1724
1725struct dx_hash_info
1726{
1727 u32 hash;
1728 u32 minor_hash;
1729 int hash_version;
1730 u32 *seed;
1731};
1732
1733
1734
1735#define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1)
1736#define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1)
1737
1738
1739
1740
1741
1742#define HASH_NB_ALWAYS 1
1743
1744
1745
1746
1747
1748struct ext4_iloc
1749{
1750 struct buffer_head *bh;
1751 unsigned long offset;
1752 ext4_group_t block_group;
1753};
1754
1755static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
1756{
1757 return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
1758}
1759
1760
1761
1762
1763
1764
1765struct dir_private_info {
1766 struct rb_root root;
1767 struct rb_node *curr_node;
1768 struct fname *extra_fname;
1769 loff_t last_pos;
1770 __u32 curr_hash;
1771 __u32 curr_minor_hash;
1772 __u32 next_hash;
1773};
1774
1775
1776static inline ext4_fsblk_t
1777ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
1778{
1779 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
1780 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
1781}
1782
1783
1784
1785
1786#define ERR_BAD_DX_DIR -75000
1787
1788
1789
1790
1791#define EXT4_DEF_LI_WAIT_MULT 10
1792#define EXT4_DEF_LI_MAX_START_DELAY 5
1793#define EXT4_LAZYINIT_QUIT 0x0001
1794#define EXT4_LAZYINIT_RUNNING 0x0002
1795
1796
1797
1798
1799struct ext4_lazy_init {
1800 unsigned long li_state;
1801 struct list_head li_request_list;
1802 struct mutex li_list_mtx;
1803};
1804
1805struct ext4_li_request {
1806 struct super_block *lr_super;
1807 struct ext4_sb_info *lr_sbi;
1808 ext4_group_t lr_next_group;
1809 struct list_head lr_request;
1810 unsigned long lr_next_sched;
1811 unsigned long lr_timeout;
1812};
1813
1814struct ext4_features {
1815 struct kobject f_kobj;
1816 struct completion f_kobj_unregister;
1817};
1818
1819
1820
1821
1822
1823
1824
1825
1826#define EXT4_MMP_MAGIC 0x004D4D50U
1827#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U
1828#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U
1829#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU
1830
1831struct mmp_struct {
1832 __le32 mmp_magic;
1833 __le32 mmp_seq;
1834
1835
1836
1837
1838
1839 __le64 mmp_time;
1840 char mmp_nodename[64];
1841 char mmp_bdevname[32];
1842
1843
1844
1845
1846
1847
1848 __le16 mmp_check_interval;
1849
1850 __le16 mmp_pad1;
1851 __le32 mmp_pad2[226];
1852 __le32 mmp_checksum;
1853};
1854
1855
1856struct mmpd_data {
1857 struct buffer_head *bh;
1858 struct super_block *sb;
1859};
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869#define EXT4_MMP_CHECK_MULT 2UL
1870
1871
1872
1873
1874#define EXT4_MMP_MIN_CHECK_INTERVAL 5UL
1875
1876
1877
1878
1879#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889# define NORET_TYPE
1890# define ATTRIB_NORET __attribute__((noreturn))
1891# define NORET_AND noreturn,
1892
1893
1894extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
1895void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
1896 struct ext4_group_desc *gdp,
1897 struct buffer_head *bh, int sz);
1898int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
1899 struct ext4_group_desc *gdp,
1900 struct buffer_head *bh, int sz);
1901void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
1902 struct ext4_group_desc *gdp,
1903 struct buffer_head *bh);
1904int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
1905 struct ext4_group_desc *gdp,
1906 struct buffer_head *bh);
1907
1908
1909extern void ext4_get_group_no_and_offset(struct super_block *sb,
1910 ext4_fsblk_t blocknr,
1911 ext4_group_t *blockgrpp,
1912 ext4_grpblk_t *offsetp);
1913extern ext4_group_t ext4_get_group_number(struct super_block *sb,
1914 ext4_fsblk_t block);
1915
1916extern void ext4_validate_block_bitmap(struct super_block *sb,
1917 struct ext4_group_desc *desc,
1918 unsigned int block_group,
1919 struct buffer_head *bh);
1920extern unsigned int ext4_block_group(struct super_block *sb,
1921 ext4_fsblk_t blocknr);
1922extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
1923 ext4_fsblk_t blocknr);
1924extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
1925extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
1926 ext4_group_t group);
1927extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
1928 ext4_fsblk_t goal,
1929 unsigned int flags,
1930 unsigned long *count,
1931 int *errp);
1932extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
1933 s64 nclusters, unsigned int flags);
1934extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *);
1935extern void ext4_check_blocks_bitmap(struct super_block *);
1936extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
1937 ext4_group_t block_group,
1938 struct buffer_head ** bh);
1939extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
1940
1941extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb,
1942 ext4_group_t block_group);
1943extern int ext4_wait_block_bitmap(struct super_block *sb,
1944 ext4_group_t block_group,
1945 struct buffer_head *bh);
1946extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
1947 ext4_group_t block_group);
1948extern void ext4_init_block_bitmap(struct super_block *sb,
1949 struct buffer_head *bh,
1950 ext4_group_t group,
1951 struct ext4_group_desc *desc);
1952extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
1953 ext4_group_t block_group,
1954 struct ext4_group_desc *gdp);
1955extern unsigned ext4_num_overhead_clusters(struct super_block *sb,
1956 ext4_group_t block_group,
1957 struct ext4_group_desc *gdp);
1958ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
1959
1960
1961extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
1962 struct file *,
1963 struct ext4_dir_entry_2 *,
1964 struct buffer_head *, char *, int,
1965 unsigned int);
1966#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \
1967 unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
1968 (de), (bh), (buf), (size), (offset)))
1969extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
1970 __u32 minor_hash,
1971 struct ext4_dir_entry_2 *dirent);
1972extern void ext4_htree_free_dir_info(struct dir_private_info *p);
1973extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
1974 struct buffer_head *bh,
1975 void *buf, int buf_size,
1976 const char *name, int namelen,
1977 struct ext4_dir_entry_2 **dest_de);
1978void ext4_insert_dentry(struct inode *inode,
1979 struct ext4_dir_entry_2 *de,
1980 int buf_size,
1981 const char *name, int namelen);
1982static inline void ext4_update_dx_flag(struct inode *inode)
1983{
1984 if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
1985 EXT4_FEATURE_COMPAT_DIR_INDEX))
1986 ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
1987}
1988static unsigned char ext4_filetype_table[] = {
1989 DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
1990};
1991
1992static inline unsigned char get_dtype(struct super_block *sb, int filetype)
1993{
1994 if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
1995 (filetype >= EXT4_FT_MAX))
1996 return DT_UNKNOWN;
1997
1998 return ext4_filetype_table[filetype];
1999}
2000
2001
2002extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
2003
2004
2005extern int ext4fs_dirhash(const char *name, int len, struct
2006 dx_hash_info *hinfo);
2007
2008
2009extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
2010 const struct qstr *qstr, __u32 goal,
2011 uid_t *owner, int handle_type,
2012 unsigned int line_no, int nblocks);
2013
2014#define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \
2015 __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \
2016 0, 0, 0)
2017#define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \
2018 type, nblocks) \
2019 __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \
2020 (type), __LINE__, (nblocks))
2021
2022
2023extern void ext4_free_inode(handle_t *, struct inode *);
2024extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
2025extern unsigned long ext4_count_free_inodes(struct super_block *);
2026extern unsigned long ext4_count_dirs(struct super_block *);
2027extern void ext4_check_inodes_bitmap(struct super_block *);
2028extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
2029extern int ext4_init_inode_table(struct super_block *sb,
2030 ext4_group_t group, int barrier);
2031extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
2032
2033
2034extern long ext4_mb_stats;
2035extern long ext4_mb_max_to_scan;
2036extern int ext4_mb_init(struct super_block *);
2037extern int ext4_mb_release(struct super_block *);
2038extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
2039 struct ext4_allocation_request *, int *);
2040extern int ext4_mb_reserve_blocks(struct super_block *, int);
2041extern void ext4_discard_preallocations(struct inode *);
2042extern int __init ext4_init_mballoc(void);
2043extern void ext4_exit_mballoc(void);
2044extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
2045 struct buffer_head *bh, ext4_fsblk_t block,
2046 unsigned long count, int flags);
2047extern int ext4_mb_alloc_groupinfo(struct super_block *sb,
2048 ext4_group_t ngroups);
2049extern int ext4_mb_add_groupinfo(struct super_block *sb,
2050 ext4_group_t i, struct ext4_group_desc *desc);
2051extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
2052 ext4_fsblk_t block, unsigned long count);
2053extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
2054
2055
2056struct buffer_head *ext4_getblk(handle_t *, struct inode *,
2057 ext4_lblk_t, int, int *);
2058struct buffer_head *ext4_bread(handle_t *, struct inode *,
2059 ext4_lblk_t, int, int *);
2060int ext4_get_block_write(struct inode *inode, sector_t iblock,
2061 struct buffer_head *bh_result, int create);
2062int ext4_get_block(struct inode *inode, sector_t iblock,
2063 struct buffer_head *bh_result, int create);
2064int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
2065 struct buffer_head *bh, int create);
2066int ext4_walk_page_buffers(handle_t *handle,
2067 struct buffer_head *head,
2068 unsigned from,
2069 unsigned to,
2070 int *partial,
2071 int (*fn)(handle_t *handle,
2072 struct buffer_head *bh));
2073int do_journal_get_write_access(handle_t *handle,
2074 struct buffer_head *bh);
2075#define FALL_BACK_TO_NONDELALLOC 1
2076#define CONVERT_INLINE_DATA 2
2077
2078extern struct inode *ext4_iget(struct super_block *, unsigned long);
2079extern int ext4_write_inode(struct inode *, struct writeback_control *);
2080extern int ext4_setattr(struct dentry *, struct iattr *);
2081extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
2082 struct kstat *stat);
2083extern void ext4_evict_inode(struct inode *);
2084extern void ext4_clear_inode(struct inode *);
2085extern int ext4_sync_inode(handle_t *, struct inode *);
2086extern void ext4_dirty_inode(struct inode *, int);
2087extern int ext4_change_inode_journal_flag(struct inode *, int);
2088extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
2089extern int ext4_inode_attach_jinode(struct inode *inode);
2090extern int ext4_can_truncate(struct inode *inode);
2091extern void ext4_truncate(struct inode *);
2092extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length);
2093extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks);
2094extern void ext4_set_inode_flags(struct inode *);
2095extern void ext4_get_inode_flags(struct ext4_inode_info *);
2096extern int ext4_alloc_da_blocks(struct inode *inode);
2097extern void ext4_set_aops(struct inode *inode);
2098extern int ext4_writepage_trans_blocks(struct inode *);
2099extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
2100extern int ext4_block_truncate_page(handle_t *handle,
2101 struct address_space *mapping, loff_t from);
2102extern int ext4_block_zero_page_range(handle_t *handle,
2103 struct address_space *mapping, loff_t from, loff_t length);
2104extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
2105 loff_t lstart, loff_t lend);
2106extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2107extern qsize_t *ext4_get_reserved_space(struct inode *inode);
2108extern void ext4_da_update_reserve_space(struct inode *inode,
2109 int used, int quota_claim);
2110
2111
2112extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
2113 struct ext4_map_blocks *map, int flags);
2114extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
2115 const struct iovec *iov, loff_t offset,
2116 unsigned long nr_segs);
2117extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
2118extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
2119extern void ext4_ind_truncate(handle_t *, struct inode *inode);
2120extern int ext4_free_hole_blocks(handle_t *handle, struct inode *inode,
2121 ext4_lblk_t first, ext4_lblk_t stop);
2122
2123
2124extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
2125extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
2126
2127
2128extern int ext4_ext_migrate(struct inode *);
2129extern int ext4_ind_migrate(struct inode *inode);
2130
2131
2132extern int ext4_dirent_csum_verify(struct inode *inode,
2133 struct ext4_dir_entry *dirent);
2134extern int ext4_orphan_add(handle_t *, struct inode *);
2135extern int ext4_orphan_del(handle_t *, struct inode *);
2136extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
2137 __u32 start_minor_hash, __u32 *next_hash);
2138extern int search_dir(struct buffer_head *bh,
2139 char *search_buf,
2140 int buf_size,
2141 struct inode *dir,
2142 const struct qstr *d_name,
2143 unsigned int offset,
2144 struct ext4_dir_entry_2 **res_dir);
2145extern int ext4_generic_delete_entry(handle_t *handle,
2146 struct inode *dir,
2147 struct ext4_dir_entry_2 *de_del,
2148 struct buffer_head *bh,
2149 void *entry_buf,
2150 int buf_size,
2151 int csum_size);
2152
2153
2154extern int ext4_group_add(struct super_block *sb,
2155 struct ext4_new_group_data *input);
2156extern int ext4_group_extend(struct super_block *sb,
2157 struct ext4_super_block *es,
2158 ext4_fsblk_t n_blocks_count);
2159extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
2160
2161
2162extern int ext4_calculate_overhead(struct super_block *sb);
2163extern int ext4_superblock_csum_verify(struct super_block *sb,
2164 struct ext4_super_block *es);
2165extern void ext4_superblock_csum_set(struct super_block *sb);
2166extern void *ext4_kvmalloc(size_t size, gfp_t flags);
2167extern void *ext4_kvzalloc(size_t size, gfp_t flags);
2168extern void ext4_kvfree(void *ptr);
2169extern int ext4_alloc_flex_bg_array(struct super_block *sb,
2170 ext4_group_t ngroup);
2171extern const char *ext4_decode_error(struct super_block *sb, int errno,
2172 char nbuf[16]);
2173
2174extern __printf(4, 5)
2175void __ext4_error(struct super_block *, const char *, unsigned int,
2176 const char *, ...);
2177extern __printf(5, 6)
2178void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t,
2179 const char *, ...);
2180extern __printf(5, 6)
2181void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t,
2182 const char *, ...);
2183extern void __ext4_std_error(struct super_block *, const char *,
2184 unsigned int, int);
2185extern __printf(4, 5)
2186void __ext4_abort(struct super_block *, const char *, unsigned int,
2187 const char *, ...);
2188extern __printf(4, 5)
2189void __ext4_warning(struct super_block *, const char *, unsigned int,
2190 const char *, ...);
2191extern __printf(3, 4)
2192void __ext4_msg(struct super_block *, const char *, const char *, ...);
2193extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
2194 const char *, unsigned int, const char *);
2195extern __printf(7, 8)
2196void __ext4_grp_locked_error(const char *, unsigned int,
2197 struct super_block *, ext4_group_t,
2198 unsigned long, ext4_fsblk_t,
2199 const char *, ...);
2200
2201#ifdef CONFIG_PRINTK
2202
2203#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2204 __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__)
2205#define ext4_error_file(file, func, line, block, fmt, ...) \
2206 __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__)
2207#define ext4_error(sb, fmt, ...) \
2208 __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2209#define ext4_abort(sb, fmt, ...) \
2210 __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2211#define ext4_warning(sb, fmt, ...) \
2212 __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2213#define ext4_msg(sb, level, fmt, ...) \
2214 __ext4_msg(sb, level, fmt, ##__VA_ARGS__)
2215#define dump_mmp_msg(sb, mmp, msg) \
2216 __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg)
2217#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2218 __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \
2219 fmt, ##__VA_ARGS__)
2220
2221#else
2222
2223#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2224do { \
2225 no_printk(fmt, ##__VA_ARGS__); \
2226 __ext4_error_inode(inode, "", 0, block, " "); \
2227} while (0)
2228#define ext4_error_file(file, func, line, block, fmt, ...) \
2229do { \
2230 no_printk(fmt, ##__VA_ARGS__); \
2231 __ext4_error_file(file, "", 0, block, " "); \
2232} while (0)
2233#define ext4_error(sb, fmt, ...) \
2234do { \
2235 no_printk(fmt, ##__VA_ARGS__); \
2236 __ext4_error(sb, "", 0, " "); \
2237} while (0)
2238#define ext4_abort(sb, fmt, ...) \
2239do { \
2240 no_printk(fmt, ##__VA_ARGS__); \
2241 __ext4_abort(sb, "", 0, " "); \
2242} while (0)
2243#define ext4_warning(sb, fmt, ...) \
2244do { \
2245 no_printk(fmt, ##__VA_ARGS__); \
2246 __ext4_warning(sb, "", 0, " "); \
2247} while (0)
2248#define ext4_msg(sb, level, fmt, ...) \
2249do { \
2250 no_printk(fmt, ##__VA_ARGS__); \
2251 __ext4_msg(sb, "", " "); \
2252} while (0)
2253#define dump_mmp_msg(sb, mmp, msg) \
2254 __dump_mmp_msg(sb, mmp, "", 0, "")
2255#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2256do { \
2257 no_printk(fmt, ##__VA_ARGS__); \
2258 __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \
2259} while (0)
2260
2261#endif
2262
2263extern void ext4_update_dynamic_rev(struct super_block *sb);
2264extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
2265 __u32 compat);
2266extern int ext4_update_rocompat_feature(handle_t *handle,
2267 struct super_block *sb, __u32 rocompat);
2268extern int ext4_update_incompat_feature(handle_t *handle,
2269 struct super_block *sb, __u32 incompat);
2270extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
2271 struct ext4_group_desc *bg);
2272extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
2273 struct ext4_group_desc *bg);
2274extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
2275 struct ext4_group_desc *bg);
2276extern __u32 ext4_free_group_clusters(struct super_block *sb,
2277 struct ext4_group_desc *bg);
2278extern __u32 ext4_free_inodes_count(struct super_block *sb,
2279 struct ext4_group_desc *bg);
2280extern __u32 ext4_used_dirs_count(struct super_block *sb,
2281 struct ext4_group_desc *bg);
2282extern __u32 ext4_itable_unused_count(struct super_block *sb,
2283 struct ext4_group_desc *bg);
2284extern void ext4_block_bitmap_set(struct super_block *sb,
2285 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2286extern void ext4_inode_bitmap_set(struct super_block *sb,
2287 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2288extern void ext4_inode_table_set(struct super_block *sb,
2289 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2290extern void ext4_free_group_clusters_set(struct super_block *sb,
2291 struct ext4_group_desc *bg,
2292 __u32 count);
2293extern void ext4_free_inodes_set(struct super_block *sb,
2294 struct ext4_group_desc *bg, __u32 count);
2295extern void ext4_used_dirs_set(struct super_block *sb,
2296 struct ext4_group_desc *bg, __u32 count);
2297extern void ext4_itable_unused_set(struct super_block *sb,
2298 struct ext4_group_desc *bg, __u32 count);
2299extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
2300 struct ext4_group_desc *gdp);
2301extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group,
2302 struct ext4_group_desc *gdp);
2303extern int ext4_register_li_request(struct super_block *sb,
2304 ext4_group_t first_not_zeroed);
2305
2306static inline int ext4_has_group_desc_csum(struct super_block *sb)
2307{
2308 return EXT4_HAS_RO_COMPAT_FEATURE(sb,
2309 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
2310 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
2311}
2312
2313static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
2314{
2315 return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
2316 le32_to_cpu(es->s_blocks_count_lo);
2317}
2318
2319static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
2320{
2321 return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
2322 le32_to_cpu(es->s_r_blocks_count_lo);
2323}
2324
2325static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
2326{
2327 return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
2328 le32_to_cpu(es->s_free_blocks_count_lo);
2329}
2330
2331static inline void ext4_blocks_count_set(struct ext4_super_block *es,
2332 ext4_fsblk_t blk)
2333{
2334 es->s_blocks_count_lo = cpu_to_le32((u32)blk);
2335 es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
2336}
2337
2338static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
2339 ext4_fsblk_t blk)
2340{
2341 es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
2342 es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
2343}
2344
2345static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
2346 ext4_fsblk_t blk)
2347{
2348 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
2349 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
2350}
2351
2352static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
2353{
2354 if (S_ISREG(le16_to_cpu(raw_inode->i_mode)))
2355 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
2356 le32_to_cpu(raw_inode->i_size_lo);
2357 else
2358 return (loff_t) le32_to_cpu(raw_inode->i_size_lo);
2359}
2360
2361static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
2362{
2363 raw_inode->i_size_lo = cpu_to_le32(i_size);
2364 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
2365}
2366
2367static inline
2368struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
2369 ext4_group_t group)
2370{
2371 struct ext4_group_info ***grp_info;
2372 long indexv, indexh;
2373 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
2374 grp_info = EXT4_SB(sb)->s_group_info;
2375 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
2376 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
2377 return grp_info[indexv][indexh];
2378}
2379
2380
2381
2382
2383
2384
2385static inline ext4_group_t ext4_get_groups_count(struct super_block *sb)
2386{
2387 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
2388
2389 smp_rmb();
2390 return ngroups;
2391}
2392
2393static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi,
2394 ext4_group_t block_group)
2395{
2396 return block_group >> sbi->s_log_groups_per_flex;
2397}
2398
2399static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi)
2400{
2401 return 1 << sbi->s_log_groups_per_flex;
2402}
2403
2404#define ext4_std_error(sb, errno) \
2405do { \
2406 if ((errno)) \
2407 __ext4_std_error((sb), __func__, __LINE__, (errno)); \
2408} while (0)
2409
2410#ifdef CONFIG_SMP
2411
2412
2413
2414
2415#define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
2416#else
2417#define EXT4_FREECLUSTERS_WATERMARK 0
2418#endif
2419
2420static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
2421{
2422
2423
2424
2425 down_write(&EXT4_I(inode)->i_data_sem);
2426 if (newsize > EXT4_I(inode)->i_disksize)
2427 EXT4_I(inode)->i_disksize = newsize;
2428 up_write(&EXT4_I(inode)->i_data_sem);
2429 return ;
2430}
2431
2432struct ext4_group_info {
2433 unsigned long bb_state;
2434 struct rb_root bb_free_root;
2435 ext4_grpblk_t bb_first_free;
2436 ext4_grpblk_t bb_free;
2437 ext4_grpblk_t bb_fragments;
2438 ext4_grpblk_t bb_largest_free_order;
2439 struct list_head bb_prealloc_list;
2440#ifdef DOUBLE_CHECK
2441 void *bb_bitmap;
2442#endif
2443 struct rw_semaphore alloc_sem;
2444 ext4_grpblk_t bb_counters[];
2445
2446
2447
2448};
2449
2450#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
2451#define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1
2452
2453#define EXT4_MB_GRP_NEED_INIT(grp) \
2454 (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
2455
2456#define EXT4_MB_GRP_WAS_TRIMMED(grp) \
2457 (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2458#define EXT4_MB_GRP_SET_TRIMMED(grp) \
2459 (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2460#define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \
2461 (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2462
2463#define EXT4_MAX_CONTENTION 8
2464#define EXT4_CONTENTION_THRESHOLD 2
2465
2466static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb,
2467 ext4_group_t group)
2468{
2469 return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group);
2470}
2471
2472
2473
2474
2475
2476static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi)
2477{
2478 return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD);
2479}
2480
2481static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
2482{
2483 spinlock_t *lock = ext4_group_lock_ptr(sb, group);
2484 if (spin_trylock(lock))
2485
2486
2487
2488
2489 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0);
2490 else {
2491
2492
2493
2494
2495 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1,
2496 EXT4_MAX_CONTENTION);
2497 spin_lock(lock);
2498 }
2499}
2500
2501static inline void ext4_unlock_group(struct super_block *sb,
2502 ext4_group_t group)
2503{
2504 spin_unlock(ext4_group_lock_ptr(sb, group));
2505}
2506
2507
2508
2509
2510#define ext4_check_indirect_blockref(inode, bh) \
2511 ext4_check_blockref(__func__, __LINE__, inode, \
2512 (__le32 *)(bh)->b_data, \
2513 EXT4_ADDR_PER_BLOCK((inode)->i_sb))
2514
2515#define ext4_ind_check_inode(inode) \
2516 ext4_check_blockref(__func__, __LINE__, inode, \
2517 EXT4_I(inode)->i_data, \
2518 EXT4_NDIR_BLOCKS)
2519
2520
2521
2522
2523
2524
2525extern const struct file_operations ext4_dir_operations;
2526
2527
2528extern const struct inode_operations ext4_file_inode_operations;
2529extern const struct file_operations ext4_file_operations;
2530extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
2531extern void ext4_unwritten_wait(struct inode *inode);
2532
2533
2534extern int ext4_has_inline_data(struct inode *inode);
2535extern int ext4_get_inline_size(struct inode *inode);
2536extern int ext4_get_max_inline_size(struct inode *inode);
2537extern int ext4_find_inline_data_nolock(struct inode *inode);
2538extern void ext4_write_inline_data(struct inode *inode,
2539 struct ext4_iloc *iloc,
2540 void *buffer, loff_t pos,
2541 unsigned int len);
2542extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
2543 unsigned int len);
2544extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
2545 unsigned int len);
2546extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
2547
2548extern int ext4_readpage_inline(struct inode *inode, struct page *page);
2549extern int ext4_try_to_write_inline_data(struct address_space *mapping,
2550 struct inode *inode,
2551 loff_t pos, unsigned len,
2552 unsigned flags,
2553 struct page **pagep);
2554extern int ext4_write_inline_data_end(struct inode *inode,
2555 loff_t pos, unsigned len,
2556 unsigned copied,
2557 struct page *page);
2558extern struct buffer_head *
2559ext4_journalled_write_inline_data(struct inode *inode,
2560 unsigned len,
2561 struct page *page);
2562extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
2563 struct inode *inode,
2564 loff_t pos, unsigned len,
2565 unsigned flags,
2566 struct page **pagep,
2567 void **fsdata);
2568extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
2569 unsigned len, unsigned copied,
2570 struct page *page);
2571extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
2572 struct inode *inode);
2573extern int ext4_try_create_inline_dir(handle_t *handle,
2574 struct inode *parent,
2575 struct inode *inode);
2576extern int ext4_read_inline_dir(struct file *filp,
2577 struct dir_context *ctx,
2578 int *has_inline_data);
2579extern int htree_inlinedir_to_tree(struct file *dir_file,
2580 struct inode *dir, ext4_lblk_t block,
2581 struct dx_hash_info *hinfo,
2582 __u32 start_hash, __u32 start_minor_hash,
2583 int *has_inline_data);
2584extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
2585 const struct qstr *d_name,
2586 struct ext4_dir_entry_2 **res_dir,
2587 int *has_inline_data);
2588extern int ext4_delete_inline_entry(handle_t *handle,
2589 struct inode *dir,
2590 struct ext4_dir_entry_2 *de_del,
2591 struct buffer_head *bh,
2592 int *has_inline_data);
2593extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
2594extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
2595 struct ext4_dir_entry_2 **parent_de,
2596 int *retval);
2597extern int ext4_inline_data_fiemap(struct inode *inode,
2598 struct fiemap_extent_info *fieinfo,
2599 int *has_inline);
2600extern int ext4_try_to_evict_inline_data(handle_t *handle,
2601 struct inode *inode,
2602 int needed);
2603extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
2604
2605extern int ext4_convert_inline_data(struct inode *inode);
2606
2607
2608extern const struct inode_operations ext4_dir_inode_operations;
2609extern const struct inode_operations ext4_special_inode_operations;
2610extern struct dentry *ext4_get_parent(struct dentry *child);
2611extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
2612 struct ext4_dir_entry_2 *de,
2613 int blocksize, int csum_size,
2614 unsigned int parent_ino, int dotdot_real_len);
2615extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
2616 unsigned int blocksize);
2617extern int ext4_handle_dirty_dirent_node(handle_t *handle,
2618 struct inode *inode,
2619 struct buffer_head *bh);
2620#define S_SHIFT 12
2621static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = {
2622 [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
2623 [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
2624 [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
2625 [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
2626 [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
2627 [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
2628 [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
2629};
2630
2631static inline void ext4_set_de_type(struct super_block *sb,
2632 struct ext4_dir_entry_2 *de,
2633 umode_t mode) {
2634 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE))
2635 de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
2636}
2637
2638
2639
2640extern const struct inode_operations ext4_symlink_inode_operations;
2641extern const struct inode_operations ext4_fast_symlink_inode_operations;
2642
2643
2644extern void ext4_release_system_zone(struct super_block *sb);
2645extern int ext4_setup_system_zone(struct super_block *sb);
2646extern int __init ext4_init_system_zone(void);
2647extern void ext4_exit_system_zone(void);
2648extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
2649 ext4_fsblk_t start_blk,
2650 unsigned int count);
2651extern int ext4_check_blockref(const char *, unsigned int,
2652 struct inode *, __le32 *, unsigned int);
2653
2654
2655struct ext4_ext_path;
2656struct ext4_extent;
2657
2658extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
2659extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
2660extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
2661extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
2662 struct ext4_map_blocks *map, int flags);
2663extern void ext4_ext_truncate(handle_t *, struct inode *);
2664extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
2665 ext4_lblk_t end);
2666extern void ext4_ext_init(struct super_block *);
2667extern void ext4_ext_release(struct super_block *);
2668extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
2669 loff_t len);
2670extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode,
2671 loff_t offset, ssize_t len);
2672extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
2673 struct ext4_map_blocks *map, int flags);
2674extern int ext4_ext_calc_metadata_amount(struct inode *inode,
2675 ext4_lblk_t lblocks);
2676extern int ext4_extent_tree_init(handle_t *, struct inode *);
2677extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
2678 int num,
2679 struct ext4_ext_path *path);
2680extern int ext4_can_extents_be_merged(struct inode *inode,
2681 struct ext4_extent *ex1,
2682 struct ext4_extent *ex2);
2683extern int ext4_ext_insert_extent(handle_t *, struct inode *,
2684 struct ext4_ext_path *,
2685 struct ext4_extent *, int);
2686extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
2687 struct ext4_ext_path *);
2688extern void ext4_ext_drop_refs(struct ext4_ext_path *);
2689extern int ext4_ext_check_inode(struct inode *inode);
2690extern int ext4_find_delalloc_range(struct inode *inode,
2691 ext4_lblk_t lblk_start,
2692 ext4_lblk_t lblk_end);
2693extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
2694extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2695 __u64 start, __u64 len);
2696
2697
2698
2699extern void ext4_double_down_write_data_sem(struct inode *first,
2700 struct inode *second);
2701extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
2702 struct inode *donor_inode);
2703void ext4_inode_double_lock(struct inode *inode1, struct inode *inode2);
2704void ext4_inode_double_unlock(struct inode *inode1, struct inode *inode2);
2705extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
2706 __u64 start_orig, __u64 start_donor,
2707 __u64 len, __u64 *moved_len);
2708
2709
2710extern int __init ext4_init_pageio(void);
2711extern void ext4_exit_pageio(void);
2712extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
2713extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end);
2714extern int ext4_put_io_end(ext4_io_end_t *io_end);
2715extern void ext4_put_io_end_defer(ext4_io_end_t *io_end);
2716extern void ext4_io_submit_init(struct ext4_io_submit *io,
2717 struct writeback_control *wbc);
2718extern void ext4_end_io_rsv_work(struct work_struct *work);
2719extern void ext4_end_io_unrsv_work(struct work_struct *work);
2720extern void ext4_io_submit(struct ext4_io_submit *io);
2721extern int ext4_bio_write_page(struct ext4_io_submit *io,
2722 struct page *page,
2723 int len,
2724 struct writeback_control *wbc);
2725
2726
2727extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
2728extern void ext4_mmp_csum_set(struct super_block *sb, struct mmp_struct *mmp);
2729extern int ext4_mmp_csum_verify(struct super_block *sb,
2730 struct mmp_struct *mmp);
2731
2732
2733
2734
2735
2736enum ext4_state_bits {
2737 BH_Uninit
2738 = BH_JBDPrivateStart,
2739 BH_AllocFromCluster,
2740
2741};
2742
2743
2744
2745
2746
2747
2748#define BH_BITMAP_UPTODATE BH_JBDPrivateStart
2749
2750static inline int bitmap_uptodate(struct buffer_head *bh)
2751{
2752 return (buffer_uptodate(bh) &&
2753 test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state));
2754}
2755static inline void set_bitmap_uptodate(struct buffer_head *bh)
2756{
2757 set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
2758}
2759
2760
2761
2762
2763
2764static inline void ext4_inode_block_unlocked_dio(struct inode *inode)
2765{
2766 ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
2767 smp_mb();
2768}
2769static inline void ext4_inode_resume_unlocked_dio(struct inode *inode)
2770{
2771 smp_mb();
2772 ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
2773}
2774
2775#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
2776
2777
2778#define EXT4_WQ_HASH_SZ 37
2779#define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\
2780 EXT4_WQ_HASH_SZ])
2781#define ext4_aio_mutex(v) (&ext4__aio_mutex[((unsigned long)(v)) %\
2782 EXT4_WQ_HASH_SZ])
2783extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
2784extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ];
2785
2786#define EXT4_RESIZING 0
2787extern int ext4_resize_begin(struct super_block *sb);
2788extern void ext4_resize_end(struct super_block *sb);
2789
2790#endif
2791
2792#endif
2793