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17#ifndef _EXT4_H
18#define _EXT4_H
19
20#include <linux/refcount.h>
21#include <linux/types.h>
22#include <linux/blkdev.h>
23#include <linux/magic.h>
24#include <linux/jbd2.h>
25#include <linux/quota.h>
26#include <linux/rwsem.h>
27#include <linux/rbtree.h>
28#include <linux/seqlock.h>
29#include <linux/mutex.h>
30#include <linux/timer.h>
31#include <linux/wait.h>
32#include <linux/sched/signal.h>
33#include <linux/blockgroup_lock.h>
34#include <linux/percpu_counter.h>
35#include <linux/ratelimit.h>
36#include <crypto/hash.h>
37#include <linux/falloc.h>
38#include <linux/percpu-rwsem.h>
39#include <linux/fiemap.h>
40#ifdef __KERNEL__
41#include <linux/compat.h>
42#endif
43
44#include <linux/fscrypt.h>
45#include <linux/fsverity.h>
46
47#include <linux/compiler.h>
48
49
50
51
52
53
54
55
56
57#define AGGRESSIVE_CHECK__
58
59
60
61
62
63#define DOUBLE_CHECK__
64
65
66
67
68#undef EXT4FS_DEBUG
69
70
71
72
73#ifdef EXT4FS_DEBUG
74#define ext4_debug(f, a...) \
75 do { \
76 printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \
77 __FILE__, __LINE__, __func__); \
78 printk(KERN_DEBUG f, ## a); \
79 } while (0)
80#else
81#define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
82#endif
83
84
85
86
87#define EXT_DEBUG__
88
89
90
91
92#ifdef CONFIG_EXT4_DEBUG
93#define ext_debug(ino, fmt, ...) \
94 pr_debug("[%s/%d] EXT4-fs (%s): ino %lu: (%s, %d): %s:" fmt, \
95 current->comm, task_pid_nr(current), \
96 ino->i_sb->s_id, ino->i_ino, __FILE__, __LINE__, \
97 __func__, ##__VA_ARGS__)
98#else
99#define ext_debug(ino, fmt, ...) no_printk(fmt, ##__VA_ARGS__)
100#endif
101
102#define ASSERT(assert) \
103do { \
104 if (unlikely(!(assert))) { \
105 printk(KERN_EMERG \
106 "Assertion failure in %s() at %s:%d: '%s'\n", \
107 __func__, __FILE__, __LINE__, #assert); \
108 BUG(); \
109 } \
110} while (0)
111
112
113typedef int ext4_grpblk_t;
114
115
116typedef unsigned long long ext4_fsblk_t;
117
118
119typedef __u32 ext4_lblk_t;
120
121
122typedef unsigned int ext4_group_t;
123
124enum SHIFT_DIRECTION {
125 SHIFT_LEFT = 0,
126 SHIFT_RIGHT,
127};
128
129
130
131
132
133
134
135
136
137#define EXT4_MB_HINT_MERGE 0x0001
138
139#define EXT4_MB_HINT_RESERVED 0x0002
140
141#define EXT4_MB_HINT_METADATA 0x0004
142
143#define EXT4_MB_HINT_FIRST 0x0008
144
145#define EXT4_MB_HINT_BEST 0x0010
146
147#define EXT4_MB_HINT_DATA 0x0020
148
149#define EXT4_MB_HINT_NOPREALLOC 0x0040
150
151#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
152
153#define EXT4_MB_HINT_GOAL_ONLY 0x0100
154
155#define EXT4_MB_HINT_TRY_GOAL 0x0200
156
157#define EXT4_MB_DELALLOC_RESERVED 0x0400
158
159#define EXT4_MB_STREAM_ALLOC 0x0800
160
161#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
162
163#define EXT4_MB_USE_RESERVED 0x2000
164
165#define EXT4_MB_STRICT_CHECK 0x4000
166
167#define EXT4_MB_CR0_OPTIMIZED 0x8000
168
169#define EXT4_MB_CR1_OPTIMIZED 0x00010000
170
171#define EXT4_MB_SEARCH_NEXT_LINEAR 0x00020000
172struct ext4_allocation_request {
173
174 struct inode *inode;
175
176 unsigned int len;
177
178 ext4_lblk_t logical;
179
180 ext4_lblk_t lleft;
181
182 ext4_lblk_t lright;
183
184 ext4_fsblk_t goal;
185
186 ext4_fsblk_t pleft;
187
188 ext4_fsblk_t pright;
189
190 unsigned int flags;
191};
192
193
194
195
196
197
198
199
200#define EXT4_MAP_NEW BIT(BH_New)
201#define EXT4_MAP_MAPPED BIT(BH_Mapped)
202#define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten)
203#define EXT4_MAP_BOUNDARY BIT(BH_Boundary)
204#define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
205 EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY)
206
207struct ext4_map_blocks {
208 ext4_fsblk_t m_pblk;
209 ext4_lblk_t m_lblk;
210 unsigned int m_len;
211 unsigned int m_flags;
212};
213
214
215
216
217struct ext4_system_blocks {
218 struct rb_root root;
219 struct rcu_head rcu;
220};
221
222
223
224
225#define EXT4_IO_END_UNWRITTEN 0x0001
226
227struct ext4_io_end_vec {
228 struct list_head list;
229 loff_t offset;
230 ssize_t size;
231};
232
233
234
235
236
237typedef struct ext4_io_end {
238 struct list_head list;
239 handle_t *handle;
240
241 struct inode *inode;
242 struct bio *bio;
243
244 unsigned int flag;
245 refcount_t count;
246 struct list_head list_vec;
247} ext4_io_end_t;
248
249struct ext4_io_submit {
250 struct writeback_control *io_wbc;
251 struct bio *io_bio;
252 ext4_io_end_t *io_end;
253 sector_t io_next_block;
254};
255
256
257
258
259#define EXT4_BAD_INO 1
260#define EXT4_ROOT_INO 2
261#define EXT4_USR_QUOTA_INO 3
262#define EXT4_GRP_QUOTA_INO 4
263#define EXT4_BOOT_LOADER_INO 5
264#define EXT4_UNDEL_DIR_INO 6
265#define EXT4_RESIZE_INO 7
266#define EXT4_JOURNAL_INO 8
267
268
269#define EXT4_GOOD_OLD_FIRST_INO 11
270
271
272
273
274#define EXT4_LINK_MAX 65000
275
276
277
278
279#define EXT4_MIN_BLOCK_SIZE 1024
280#define EXT4_MAX_BLOCK_SIZE 65536
281#define EXT4_MIN_BLOCK_LOG_SIZE 10
282#define EXT4_MAX_BLOCK_LOG_SIZE 16
283#define EXT4_MAX_CLUSTER_LOG_SIZE 30
284#ifdef __KERNEL__
285# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
286#else
287# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
288#endif
289#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
290#define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \
291 EXT4_SB(s)->s_cluster_bits)
292#ifdef __KERNEL__
293# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
294# define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits)
295#else
296# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
297#endif
298#ifdef __KERNEL__
299#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits)
300#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size)
301#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino)
302#else
303#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
304 EXT4_GOOD_OLD_INODE_SIZE : \
305 (s)->s_inode_size)
306#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
307 EXT4_GOOD_OLD_FIRST_INO : \
308 (s)->s_first_ino)
309#endif
310#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
311#define EXT4_MAX_BLOCKS(size, offset, blkbits) \
312 ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \
313 blkbits))
314
315
316#define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits)
317
318#define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits)
319
320#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \
321 (sbi)->s_cluster_bits)
322
323#define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \
324 ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
325#define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \
326 ~((ext4_lblk_t) (s)->s_cluster_ratio - 1))
327
328#define EXT4_LBLK_CFILL(sbi, lblk) ((lblk) | \
329 ((ext4_lblk_t) (sbi)->s_cluster_ratio - 1))
330
331#define EXT4_PBLK_COFF(s, pblk) ((pblk) & \
332 ((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
333#define EXT4_LBLK_COFF(s, lblk) ((lblk) & \
334 ((ext4_lblk_t) (s)->s_cluster_ratio - 1))
335
336
337
338
339struct ext4_group_desc
340{
341 __le32 bg_block_bitmap_lo;
342 __le32 bg_inode_bitmap_lo;
343 __le32 bg_inode_table_lo;
344 __le16 bg_free_blocks_count_lo;
345 __le16 bg_free_inodes_count_lo;
346 __le16 bg_used_dirs_count_lo;
347 __le16 bg_flags;
348 __le32 bg_exclude_bitmap_lo;
349 __le16 bg_block_bitmap_csum_lo;
350 __le16 bg_inode_bitmap_csum_lo;
351 __le16 bg_itable_unused_lo;
352 __le16 bg_checksum;
353 __le32 bg_block_bitmap_hi;
354 __le32 bg_inode_bitmap_hi;
355 __le32 bg_inode_table_hi;
356 __le16 bg_free_blocks_count_hi;
357 __le16 bg_free_inodes_count_hi;
358 __le16 bg_used_dirs_count_hi;
359 __le16 bg_itable_unused_hi;
360 __le32 bg_exclude_bitmap_hi;
361 __le16 bg_block_bitmap_csum_hi;
362 __le16 bg_inode_bitmap_csum_hi;
363 __u32 bg_reserved;
364};
365
366#define EXT4_BG_INODE_BITMAP_CSUM_HI_END \
367 (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \
368 sizeof(__le16))
369#define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \
370 (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \
371 sizeof(__le16))
372
373
374
375
376
377struct flex_groups {
378 atomic64_t free_clusters;
379 atomic_t free_inodes;
380 atomic_t used_dirs;
381};
382
383#define EXT4_BG_INODE_UNINIT 0x0001
384#define EXT4_BG_BLOCK_UNINIT 0x0002
385#define EXT4_BG_INODE_ZEROED 0x0004
386
387
388
389
390#define EXT4_MIN_DESC_SIZE 32
391#define EXT4_MIN_DESC_SIZE_64BIT 64
392#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
393#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
394#ifdef __KERNEL__
395# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group)
396# define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group)
397# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block)
398# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group)
399# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits)
400#else
401# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
402# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
403# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
404#endif
405
406
407
408
409#define EXT4_NDIR_BLOCKS 12
410#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
411#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
412#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
413#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
414
415
416
417
418#define EXT4_SECRM_FL 0x00000001
419#define EXT4_UNRM_FL 0x00000002
420#define EXT4_COMPR_FL 0x00000004
421#define EXT4_SYNC_FL 0x00000008
422#define EXT4_IMMUTABLE_FL 0x00000010
423#define EXT4_APPEND_FL 0x00000020
424#define EXT4_NODUMP_FL 0x00000040
425#define EXT4_NOATIME_FL 0x00000080
426
427#define EXT4_DIRTY_FL 0x00000100
428#define EXT4_COMPRBLK_FL 0x00000200
429#define EXT4_NOCOMPR_FL 0x00000400
430
431#define EXT4_ENCRYPT_FL 0x00000800
432
433#define EXT4_INDEX_FL 0x00001000
434#define EXT4_IMAGIC_FL 0x00002000
435#define EXT4_JOURNAL_DATA_FL 0x00004000
436#define EXT4_NOTAIL_FL 0x00008000
437#define EXT4_DIRSYNC_FL 0x00010000
438#define EXT4_TOPDIR_FL 0x00020000
439#define EXT4_HUGE_FILE_FL 0x00040000
440#define EXT4_EXTENTS_FL 0x00080000
441#define EXT4_VERITY_FL 0x00100000
442#define EXT4_EA_INODE_FL 0x00200000
443
444
445#define EXT4_DAX_FL 0x02000000
446
447#define EXT4_INLINE_DATA_FL 0x10000000
448#define EXT4_PROJINHERIT_FL 0x20000000
449#define EXT4_CASEFOLD_FL 0x40000000
450#define EXT4_RESERVED_FL 0x80000000
451
452
453#define EXT4_FL_USER_MODIFIABLE (EXT4_SECRM_FL | \
454 EXT4_UNRM_FL | \
455 EXT4_COMPR_FL | \
456 EXT4_SYNC_FL | \
457 EXT4_IMMUTABLE_FL | \
458 EXT4_APPEND_FL | \
459 EXT4_NODUMP_FL | \
460 EXT4_NOATIME_FL | \
461 EXT4_JOURNAL_DATA_FL | \
462 EXT4_NOTAIL_FL | \
463 EXT4_DIRSYNC_FL | \
464 EXT4_TOPDIR_FL | \
465 EXT4_EXTENTS_FL | \
466 0x00400000 | \
467 EXT4_DAX_FL | \
468 EXT4_PROJINHERIT_FL | \
469 EXT4_CASEFOLD_FL)
470
471
472#define EXT4_FL_USER_VISIBLE (EXT4_FL_USER_MODIFIABLE | \
473 EXT4_DIRTY_FL | \
474 EXT4_COMPRBLK_FL | \
475 EXT4_NOCOMPR_FL | \
476 EXT4_ENCRYPT_FL | \
477 EXT4_INDEX_FL | \
478 EXT4_VERITY_FL | \
479 EXT4_INLINE_DATA_FL)
480
481
482#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
483 EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
484 EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
485 EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\
486 EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL |\
487 EXT4_DAX_FL)
488
489
490#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\
491 EXT4_PROJINHERIT_FL))
492
493
494#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
495
496
497#define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL)
498
499
500#define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\
501 EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL)
502
503
504static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
505{
506 if (S_ISDIR(mode))
507 return flags;
508 else if (S_ISREG(mode))
509 return flags & EXT4_REG_FLMASK;
510 else
511 return flags & EXT4_OTHER_FLMASK;
512}
513
514
515
516
517enum {
518 EXT4_INODE_SECRM = 0,
519 EXT4_INODE_UNRM = 1,
520 EXT4_INODE_COMPR = 2,
521 EXT4_INODE_SYNC = 3,
522 EXT4_INODE_IMMUTABLE = 4,
523 EXT4_INODE_APPEND = 5,
524 EXT4_INODE_NODUMP = 6,
525 EXT4_INODE_NOATIME = 7,
526
527 EXT4_INODE_DIRTY = 8,
528 EXT4_INODE_COMPRBLK = 9,
529 EXT4_INODE_NOCOMPR = 10,
530 EXT4_INODE_ENCRYPT = 11,
531
532 EXT4_INODE_INDEX = 12,
533 EXT4_INODE_IMAGIC = 13,
534 EXT4_INODE_JOURNAL_DATA = 14,
535 EXT4_INODE_NOTAIL = 15,
536 EXT4_INODE_DIRSYNC = 16,
537 EXT4_INODE_TOPDIR = 17,
538 EXT4_INODE_HUGE_FILE = 18,
539 EXT4_INODE_EXTENTS = 19,
540 EXT4_INODE_VERITY = 20,
541 EXT4_INODE_EA_INODE = 21,
542
543 EXT4_INODE_DAX = 25,
544 EXT4_INODE_INLINE_DATA = 28,
545 EXT4_INODE_PROJINHERIT = 29,
546 EXT4_INODE_CASEFOLD = 30,
547 EXT4_INODE_RESERVED = 31,
548};
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
564#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
565
566static inline void ext4_check_flag_values(void)
567{
568 CHECK_FLAG_VALUE(SECRM);
569 CHECK_FLAG_VALUE(UNRM);
570 CHECK_FLAG_VALUE(COMPR);
571 CHECK_FLAG_VALUE(SYNC);
572 CHECK_FLAG_VALUE(IMMUTABLE);
573 CHECK_FLAG_VALUE(APPEND);
574 CHECK_FLAG_VALUE(NODUMP);
575 CHECK_FLAG_VALUE(NOATIME);
576 CHECK_FLAG_VALUE(DIRTY);
577 CHECK_FLAG_VALUE(COMPRBLK);
578 CHECK_FLAG_VALUE(NOCOMPR);
579 CHECK_FLAG_VALUE(ENCRYPT);
580 CHECK_FLAG_VALUE(INDEX);
581 CHECK_FLAG_VALUE(IMAGIC);
582 CHECK_FLAG_VALUE(JOURNAL_DATA);
583 CHECK_FLAG_VALUE(NOTAIL);
584 CHECK_FLAG_VALUE(DIRSYNC);
585 CHECK_FLAG_VALUE(TOPDIR);
586 CHECK_FLAG_VALUE(HUGE_FILE);
587 CHECK_FLAG_VALUE(EXTENTS);
588 CHECK_FLAG_VALUE(VERITY);
589 CHECK_FLAG_VALUE(EA_INODE);
590 CHECK_FLAG_VALUE(INLINE_DATA);
591 CHECK_FLAG_VALUE(PROJINHERIT);
592 CHECK_FLAG_VALUE(CASEFOLD);
593 CHECK_FLAG_VALUE(RESERVED);
594}
595
596
597struct ext4_new_group_input {
598 __u32 group;
599 __u64 block_bitmap;
600 __u64 inode_bitmap;
601 __u64 inode_table;
602 __u32 blocks_count;
603 __u16 reserved_blocks;
604 __u16 unused;
605};
606
607#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
608struct compat_ext4_new_group_input {
609 u32 group;
610 compat_u64 block_bitmap;
611 compat_u64 inode_bitmap;
612 compat_u64 inode_table;
613 u32 blocks_count;
614 u16 reserved_blocks;
615 u16 unused;
616};
617#endif
618
619
620struct ext4_new_group_data {
621 __u32 group;
622 __u64 block_bitmap;
623 __u64 inode_bitmap;
624 __u64 inode_table;
625 __u32 blocks_count;
626 __u16 reserved_blocks;
627 __u16 mdata_blocks;
628 __u32 free_clusters_count;
629};
630
631
632enum {
633 BLOCK_BITMAP = 0,
634 INODE_BITMAP,
635 INODE_TABLE,
636 GROUP_TABLE_COUNT,
637};
638
639
640
641
642
643
644#define EXT4_GET_BLOCKS_CREATE 0x0001
645
646#define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002
647#define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\
648 EXT4_GET_BLOCKS_CREATE)
649
650
651#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
652
653
654
655#define EXT4_GET_BLOCKS_PRE_IO 0x0008
656#define EXT4_GET_BLOCKS_CONVERT 0x0010
657#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
658 EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
659
660#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
661 EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
662
663
664#define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020
665
666#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
667
668#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100
669
670#define EXT4_GET_BLOCKS_ZERO 0x0200
671#define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\
672 EXT4_GET_BLOCKS_ZERO)
673
674
675#define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400
676
677
678
679
680
681
682
683
684
685
686#define EXT4_EX_NOCACHE 0x40000000
687#define EXT4_EX_FORCE_CACHE 0x20000000
688#define EXT4_EX_NOFAIL 0x10000000
689
690
691
692
693#define EXT4_FREE_BLOCKS_METADATA 0x0001
694#define EXT4_FREE_BLOCKS_FORGET 0x0002
695#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
696#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
697#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010
698#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020
699#define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040
700
701
702
703
704#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
705#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
706#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
707#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
708#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
709#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
710#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
711#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
712#define EXT4_IOC_MIGRATE _IO('f', 9)
713
714
715#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
716#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
717#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
718#define EXT4_IOC_SWAP_BOOT _IO('f', 17)
719#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18)
720
721#define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40)
722#define EXT4_IOC_GETSTATE _IOW('f', 41, __u32)
723#define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap)
724#define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32)
725
726#define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32)
727
728
729
730
731#define EXT4_GOING_FLAGS_DEFAULT 0x0
732#define EXT4_GOING_FLAGS_LOGFLUSH 0x1
733#define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2
734
735
736
737
738
739
740
741#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001
742#define EXT4_STATE_FLAG_NEW 0x00000002
743#define EXT4_STATE_FLAG_NEWENTRY 0x00000004
744#define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008
745
746
747#define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1
748#define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2
749#define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4
750#define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \
751 EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \
752 EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
753
754#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
755
756
757
758#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
759#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
760#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
761#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
762#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
763#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input)
764#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
765#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
766#endif
767
768
769
770
771
772#define EXT4_FIEMAP_EXTENT_HOLE 0x08000000
773
774
775#define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
776
777
778#define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFE
779
780
781
782
783struct ext4_inode {
784 __le16 i_mode;
785 __le16 i_uid;
786 __le32 i_size_lo;
787 __le32 i_atime;
788 __le32 i_ctime;
789 __le32 i_mtime;
790 __le32 i_dtime;
791 __le16 i_gid;
792 __le16 i_links_count;
793 __le32 i_blocks_lo;
794 __le32 i_flags;
795 union {
796 struct {
797 __le32 l_i_version;
798 } linux1;
799 struct {
800 __u32 h_i_translator;
801 } hurd1;
802 struct {
803 __u32 m_i_reserved1;
804 } masix1;
805 } osd1;
806 __le32 i_block[EXT4_N_BLOCKS];
807 __le32 i_generation;
808 __le32 i_file_acl_lo;
809 __le32 i_size_high;
810 __le32 i_obso_faddr;
811 union {
812 struct {
813 __le16 l_i_blocks_high;
814 __le16 l_i_file_acl_high;
815 __le16 l_i_uid_high;
816 __le16 l_i_gid_high;
817 __le16 l_i_checksum_lo;
818 __le16 l_i_reserved;
819 } linux2;
820 struct {
821 __le16 h_i_reserved1;
822 __u16 h_i_mode_high;
823 __u16 h_i_uid_high;
824 __u16 h_i_gid_high;
825 __u32 h_i_author;
826 } hurd2;
827 struct {
828 __le16 h_i_reserved1;
829 __le16 m_i_file_acl_high;
830 __u32 m_i_reserved2[2];
831 } masix2;
832 } osd2;
833 __le16 i_extra_isize;
834 __le16 i_checksum_hi;
835 __le32 i_ctime_extra;
836 __le32 i_mtime_extra;
837 __le32 i_atime_extra;
838 __le32 i_crtime;
839 __le32 i_crtime_extra;
840 __le32 i_version_hi;
841 __le32 i_projid;
842};
843
844struct move_extent {
845 __u32 reserved;
846 __u32 donor_fd;
847 __u64 orig_start;
848 __u64 donor_start;
849 __u64 len;
850 __u64 moved_len;
851};
852
853#define EXT4_EPOCH_BITS 2
854#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
855#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
856
857
858
859
860
861
862
863
864
865
866
867#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \
868 ((offsetof(typeof(*ext4_inode), field) + \
869 sizeof((ext4_inode)->field)) \
870 <= (EXT4_GOOD_OLD_INODE_SIZE + \
871 (einode)->i_extra_isize)) \
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894static inline __le32 ext4_encode_extra_time(struct timespec64 *time)
895{
896 u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK;
897 return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS));
898}
899
900static inline void ext4_decode_extra_time(struct timespec64 *time,
901 __le32 extra)
902{
903 if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK)))
904 time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32;
905 time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
906}
907
908#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
909do { \
910 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\
911 (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
912 (raw_inode)->xtime ## _extra = \
913 ext4_encode_extra_time(&(inode)->xtime); \
914 } \
915 else \
916 (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \
917} while (0)
918
919#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
920do { \
921 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
922 (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \
923 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
924 (raw_inode)->xtime ## _extra = \
925 ext4_encode_extra_time(&(einode)->xtime); \
926} while (0)
927
928#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \
929do { \
930 (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \
931 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \
932 ext4_decode_extra_time(&(inode)->xtime, \
933 raw_inode->xtime ## _extra); \
934 } \
935 else \
936 (inode)->xtime.tv_nsec = 0; \
937} while (0)
938
939
940#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \
941do { \
942 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
943 (einode)->xtime.tv_sec = \
944 (signed)le32_to_cpu((raw_inode)->xtime); \
945 else \
946 (einode)->xtime.tv_sec = 0; \
947 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
948 ext4_decode_extra_time(&(einode)->xtime, \
949 raw_inode->xtime ## _extra); \
950 else \
951 (einode)->xtime.tv_nsec = 0; \
952} while (0)
953
954#define i_disk_version osd1.linux1.l_i_version
955
956#if defined(__KERNEL__) || defined(__linux__)
957#define i_reserved1 osd1.linux1.l_i_reserved1
958#define i_file_acl_high osd2.linux2.l_i_file_acl_high
959#define i_blocks_high osd2.linux2.l_i_blocks_high
960#define i_uid_low i_uid
961#define i_gid_low i_gid
962#define i_uid_high osd2.linux2.l_i_uid_high
963#define i_gid_high osd2.linux2.l_i_gid_high
964#define i_checksum_lo osd2.linux2.l_i_checksum_lo
965
966#elif defined(__GNU__)
967
968#define i_translator osd1.hurd1.h_i_translator
969#define i_uid_high osd2.hurd2.h_i_uid_high
970#define i_gid_high osd2.hurd2.h_i_gid_high
971#define i_author osd2.hurd2.h_i_author
972
973#elif defined(__masix__)
974
975#define i_reserved1 osd1.masix1.m_i_reserved1
976#define i_file_acl_high osd2.masix2.m_i_file_acl_high
977#define i_reserved2 osd2.masix2.m_i_reserved2
978
979#endif
980
981#include "extents_status.h"
982#include "fast_commit.h"
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000enum {
1001 I_DATA_SEM_NORMAL = 0,
1002 I_DATA_SEM_OTHER,
1003 I_DATA_SEM_QUOTA,
1004};
1005
1006
1007
1008
1009
1010struct ext4_inode_info {
1011 __le32 i_data[15];
1012 __u32 i_dtime;
1013 ext4_fsblk_t i_file_acl;
1014
1015
1016
1017
1018
1019
1020
1021
1022 ext4_group_t i_block_group;
1023 ext4_lblk_t i_dir_start_lookup;
1024#if (BITS_PER_LONG < 64)
1025 unsigned long i_state_flags;
1026#endif
1027 unsigned long i_flags;
1028
1029
1030
1031
1032
1033
1034
1035
1036 struct rw_semaphore xattr_sem;
1037
1038
1039
1040
1041
1042 union {
1043 struct list_head i_orphan;
1044 unsigned int i_orphan_idx;
1045 };
1046
1047
1048
1049 struct list_head i_fc_list;
1050
1051
1052
1053
1054
1055 ext4_lblk_t i_fc_lblk_start;
1056
1057
1058 ext4_lblk_t i_fc_lblk_len;
1059
1060
1061 atomic_t i_fc_updates;
1062
1063
1064 wait_queue_head_t i_fc_wait;
1065
1066
1067 struct mutex i_fc_lock;
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084 loff_t i_disksize;
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096 struct rw_semaphore i_data_sem;
1097 struct inode vfs_inode;
1098 struct jbd2_inode *jinode;
1099
1100 spinlock_t i_raw_lock;
1101
1102
1103
1104
1105
1106 struct timespec64 i_crtime;
1107
1108
1109 atomic_t i_prealloc_active;
1110 struct list_head i_prealloc_list;
1111 spinlock_t i_prealloc_lock;
1112
1113
1114 struct ext4_es_tree i_es_tree;
1115 rwlock_t i_es_lock;
1116 struct list_head i_es_list;
1117 unsigned int i_es_all_nr;
1118 unsigned int i_es_shk_nr;
1119 ext4_lblk_t i_es_shrink_lblk;
1120
1121
1122
1123
1124 ext4_group_t i_last_alloc_group;
1125
1126
1127
1128 unsigned int i_reserved_data_blocks;
1129
1130
1131 struct ext4_pending_tree i_pending_tree;
1132
1133
1134 __u16 i_extra_isize;
1135
1136
1137 u16 i_inline_off;
1138 u16 i_inline_size;
1139
1140#ifdef CONFIG_QUOTA
1141
1142 qsize_t i_reserved_quota;
1143#endif
1144
1145
1146 spinlock_t i_completed_io_lock;
1147
1148
1149
1150
1151 struct list_head i_rsv_conversion_list;
1152 struct work_struct i_rsv_conversion_work;
1153 atomic_t i_unwritten;
1154
1155 spinlock_t i_block_reservation_lock;
1156
1157
1158
1159
1160
1161 tid_t i_sync_tid;
1162 tid_t i_datasync_tid;
1163
1164#ifdef CONFIG_QUOTA
1165 struct dquot *i_dquot[MAXQUOTAS];
1166#endif
1167
1168
1169 __u32 i_csum_seed;
1170
1171 kprojid_t i_projid;
1172};
1173
1174
1175
1176
1177#define EXT4_VALID_FS 0x0001
1178#define EXT4_ERROR_FS 0x0002
1179#define EXT4_ORPHAN_FS 0x0004
1180#define EXT4_FC_REPLAY 0x0020
1181
1182
1183
1184
1185#define EXT2_FLAGS_SIGNED_HASH 0x0001
1186#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
1187#define EXT2_FLAGS_TEST_FILESYS 0x0004
1188
1189
1190
1191
1192#define EXT4_MOUNT_NO_MBCACHE 0x00001
1193#define EXT4_MOUNT_GRPID 0x00004
1194#define EXT4_MOUNT_DEBUG 0x00008
1195#define EXT4_MOUNT_ERRORS_CONT 0x00010
1196#define EXT4_MOUNT_ERRORS_RO 0x00020
1197#define EXT4_MOUNT_ERRORS_PANIC 0x00040
1198#define EXT4_MOUNT_ERRORS_MASK 0x00070
1199#define EXT4_MOUNT_MINIX_DF 0x00080
1200#define EXT4_MOUNT_NOLOAD 0x00100
1201#ifdef CONFIG_FS_DAX
1202#define EXT4_MOUNT_DAX_ALWAYS 0x00200
1203#else
1204#define EXT4_MOUNT_DAX_ALWAYS 0
1205#endif
1206#define EXT4_MOUNT_DATA_FLAGS 0x00C00
1207#define EXT4_MOUNT_JOURNAL_DATA 0x00400
1208#define EXT4_MOUNT_ORDERED_DATA 0x00800
1209#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
1210#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
1211#define EXT4_MOUNT_NO_UID32 0x02000
1212#define EXT4_MOUNT_XATTR_USER 0x04000
1213#define EXT4_MOUNT_POSIX_ACL 0x08000
1214#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
1215#define EXT4_MOUNT_BARRIER 0x20000
1216#define EXT4_MOUNT_QUOTA 0x40000
1217#define EXT4_MOUNT_USRQUOTA 0x80000
1218
1219
1220#define EXT4_MOUNT_GRPQUOTA 0x100000
1221
1222
1223#define EXT4_MOUNT_PRJQUOTA 0x200000
1224
1225#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
1226#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
1227#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
1228#define EXT4_MOUNT_WARN_ON_ERROR 0x2000000
1229#define EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS 0x4000000
1230#define EXT4_MOUNT_DELALLOC 0x8000000
1231#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
1232#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
1233#define EXT4_MOUNT_DISCARD 0x40000000
1234#define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000
1235
1236
1237
1238
1239
1240
1241#define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001
1242
1243#define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002
1244
1245
1246#define EXT4_MOUNT2_HURD_COMPAT 0x00000004
1247
1248#define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008
1249
1250
1251#define EXT4_MOUNT2_JOURNAL_FAST_COMMIT 0x00000010
1252#define EXT4_MOUNT2_DAX_NEVER 0x00000020
1253#define EXT4_MOUNT2_DAX_INODE 0x00000040
1254#define EXT4_MOUNT2_MB_OPTIMIZE_SCAN 0x00000080
1255
1256
1257
1258#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \
1259 ~EXT4_MOUNT_##opt
1260#define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \
1261 EXT4_MOUNT_##opt
1262#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \
1263 EXT4_MOUNT_##opt)
1264
1265#define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \
1266 ~EXT4_MOUNT2_##opt
1267#define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \
1268 EXT4_MOUNT2_##opt
1269#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \
1270 EXT4_MOUNT2_##opt)
1271
1272#define ext4_test_and_set_bit __test_and_set_bit_le
1273#define ext4_set_bit __set_bit_le
1274#define ext4_set_bit_atomic ext2_set_bit_atomic
1275#define ext4_test_and_clear_bit __test_and_clear_bit_le
1276#define ext4_clear_bit __clear_bit_le
1277#define ext4_clear_bit_atomic ext2_clear_bit_atomic
1278#define ext4_test_bit test_bit_le
1279#define ext4_find_next_zero_bit find_next_zero_bit_le
1280#define ext4_find_next_bit find_next_bit_le
1281
1282extern void ext4_set_bits(void *bm, int cur, int len);
1283
1284
1285
1286
1287#define EXT4_DFL_MAX_MNT_COUNT 20
1288#define EXT4_DFL_CHECKINTERVAL 0
1289
1290
1291
1292
1293#define EXT4_ERRORS_CONTINUE 1
1294#define EXT4_ERRORS_RO 2
1295#define EXT4_ERRORS_PANIC 3
1296#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
1297
1298
1299#define EXT4_CRC32C_CHKSUM 1
1300
1301
1302
1303
1304struct ext4_super_block {
1305 __le32 s_inodes_count;
1306 __le32 s_blocks_count_lo;
1307 __le32 s_r_blocks_count_lo;
1308 __le32 s_free_blocks_count_lo;
1309 __le32 s_free_inodes_count;
1310 __le32 s_first_data_block;
1311 __le32 s_log_block_size;
1312 __le32 s_log_cluster_size;
1313 __le32 s_blocks_per_group;
1314 __le32 s_clusters_per_group;
1315 __le32 s_inodes_per_group;
1316 __le32 s_mtime;
1317 __le32 s_wtime;
1318 __le16 s_mnt_count;
1319 __le16 s_max_mnt_count;
1320 __le16 s_magic;
1321 __le16 s_state;
1322 __le16 s_errors;
1323 __le16 s_minor_rev_level;
1324 __le32 s_lastcheck;
1325 __le32 s_checkinterval;
1326 __le32 s_creator_os;
1327 __le32 s_rev_level;
1328 __le16 s_def_resuid;
1329 __le16 s_def_resgid;
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343 __le32 s_first_ino;
1344 __le16 s_inode_size;
1345 __le16 s_block_group_nr;
1346 __le32 s_feature_compat;
1347 __le32 s_feature_incompat;
1348 __le32 s_feature_ro_compat;
1349 __u8 s_uuid[16];
1350 char s_volume_name[16];
1351 char s_last_mounted[64] __nonstring;
1352 __le32 s_algorithm_usage_bitmap;
1353
1354
1355
1356
1357 __u8 s_prealloc_blocks;
1358 __u8 s_prealloc_dir_blocks;
1359 __le16 s_reserved_gdt_blocks;
1360
1361
1362
1363 __u8 s_journal_uuid[16];
1364 __le32 s_journal_inum;
1365 __le32 s_journal_dev;
1366 __le32 s_last_orphan;
1367 __le32 s_hash_seed[4];
1368 __u8 s_def_hash_version;
1369 __u8 s_jnl_backup_type;
1370 __le16 s_desc_size;
1371 __le32 s_default_mount_opts;
1372 __le32 s_first_meta_bg;
1373 __le32 s_mkfs_time;
1374 __le32 s_jnl_blocks[17];
1375
1376 __le32 s_blocks_count_hi;
1377 __le32 s_r_blocks_count_hi;
1378 __le32 s_free_blocks_count_hi;
1379 __le16 s_min_extra_isize;
1380 __le16 s_want_extra_isize;
1381 __le32 s_flags;
1382 __le16 s_raid_stride;
1383 __le16 s_mmp_update_interval;
1384 __le64 s_mmp_block;
1385 __le32 s_raid_stripe_width;
1386 __u8 s_log_groups_per_flex;
1387 __u8 s_checksum_type;
1388 __u8 s_encryption_level;
1389 __u8 s_reserved_pad;
1390 __le64 s_kbytes_written;
1391 __le32 s_snapshot_inum;
1392 __le32 s_snapshot_id;
1393 __le64 s_snapshot_r_blocks_count;
1394
1395 __le32 s_snapshot_list;
1396
1397#define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count)
1398 __le32 s_error_count;
1399 __le32 s_first_error_time;
1400 __le32 s_first_error_ino;
1401 __le64 s_first_error_block;
1402 __u8 s_first_error_func[32] __nonstring;
1403 __le32 s_first_error_line;
1404 __le32 s_last_error_time;
1405 __le32 s_last_error_ino;
1406 __le32 s_last_error_line;
1407 __le64 s_last_error_block;
1408 __u8 s_last_error_func[32] __nonstring;
1409#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
1410 __u8 s_mount_opts[64];
1411 __le32 s_usr_quota_inum;
1412 __le32 s_grp_quota_inum;
1413 __le32 s_overhead_clusters;
1414 __le32 s_backup_bgs[2];
1415 __u8 s_encrypt_algos[4];
1416 __u8 s_encrypt_pw_salt[16];
1417 __le32 s_lpf_ino;
1418 __le32 s_prj_quota_inum;
1419 __le32 s_checksum_seed;
1420 __u8 s_wtime_hi;
1421 __u8 s_mtime_hi;
1422 __u8 s_mkfs_time_hi;
1423 __u8 s_lastcheck_hi;
1424 __u8 s_first_error_time_hi;
1425 __u8 s_last_error_time_hi;
1426 __u8 s_first_error_errcode;
1427 __u8 s_last_error_errcode;
1428 __le16 s_encoding;
1429 __le16 s_encoding_flags;
1430 __le32 s_orphan_file_inum;
1431 __le32 s_reserved[94];
1432 __le32 s_checksum;
1433};
1434
1435#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
1436
1437#ifdef __KERNEL__
1438
1439#ifdef CONFIG_FS_ENCRYPTION
1440#define DUMMY_ENCRYPTION_ENABLED(sbi) ((sbi)->s_dummy_enc_policy.policy != NULL)
1441#else
1442#define DUMMY_ENCRYPTION_ENABLED(sbi) (0)
1443#endif
1444
1445
1446#define EXT4_MAXQUOTAS 3
1447
1448#define EXT4_ENC_UTF8_12_1 1
1449
1450
1451enum ext4_journal_trigger_type {
1452 EXT4_JTR_ORPHAN_FILE,
1453 EXT4_JTR_NONE
1454};
1455
1456#define EXT4_JOURNAL_TRIGGER_COUNT EXT4_JTR_NONE
1457
1458struct ext4_journal_trigger {
1459 struct jbd2_buffer_trigger_type tr_triggers;
1460 struct super_block *sb;
1461};
1462
1463static inline struct ext4_journal_trigger *EXT4_TRIGGER(
1464 struct jbd2_buffer_trigger_type *trigger)
1465{
1466 return container_of(trigger, struct ext4_journal_trigger, tr_triggers);
1467}
1468
1469#define EXT4_ORPHAN_BLOCK_MAGIC 0x0b10ca04
1470
1471
1472struct ext4_orphan_block_tail {
1473 __le32 ob_magic;
1474 __le32 ob_checksum;
1475};
1476
1477static inline int ext4_inodes_per_orphan_block(struct super_block *sb)
1478{
1479 return (sb->s_blocksize - sizeof(struct ext4_orphan_block_tail)) /
1480 sizeof(u32);
1481}
1482
1483struct ext4_orphan_block {
1484 atomic_t ob_free_entries;
1485 struct buffer_head *ob_bh;
1486};
1487
1488
1489
1490
1491struct ext4_orphan_info {
1492 int of_blocks;
1493 __u32 of_csum_seed;
1494 struct ext4_orphan_block *of_binfo;
1495
1496};
1497
1498
1499
1500
1501struct ext4_sb_info {
1502 unsigned long s_desc_size;
1503 unsigned long s_inodes_per_block;
1504 unsigned long s_blocks_per_group;
1505 unsigned long s_clusters_per_group;
1506 unsigned long s_inodes_per_group;
1507 unsigned long s_itb_per_group;
1508 unsigned long s_gdb_count;
1509 unsigned long s_desc_per_block;
1510 ext4_group_t s_groups_count;
1511 ext4_group_t s_blockfile_groups;
1512 unsigned long s_overhead;
1513 unsigned int s_cluster_ratio;
1514 unsigned int s_cluster_bits;
1515 loff_t s_bitmap_maxbytes;
1516 struct buffer_head * s_sbh;
1517 struct ext4_super_block *s_es;
1518 struct buffer_head * __rcu *s_group_desc;
1519 unsigned int s_mount_opt;
1520 unsigned int s_mount_opt2;
1521 unsigned long s_mount_flags;
1522 unsigned int s_def_mount_opt;
1523 ext4_fsblk_t s_sb_block;
1524 atomic64_t s_resv_clusters;
1525 kuid_t s_resuid;
1526 kgid_t s_resgid;
1527 unsigned short s_mount_state;
1528 unsigned short s_pad;
1529 int s_addr_per_block_bits;
1530 int s_desc_per_block_bits;
1531 int s_inode_size;
1532 int s_first_ino;
1533 unsigned int s_inode_readahead_blks;
1534 unsigned int s_inode_goal;
1535 u32 s_hash_seed[4];
1536 int s_def_hash_version;
1537 int s_hash_unsigned;
1538 struct percpu_counter s_freeclusters_counter;
1539 struct percpu_counter s_freeinodes_counter;
1540 struct percpu_counter s_dirs_counter;
1541 struct percpu_counter s_dirtyclusters_counter;
1542 struct percpu_counter s_sra_exceeded_retry_limit;
1543 struct blockgroup_lock *s_blockgroup_lock;
1544 struct proc_dir_entry *s_proc;
1545 struct kobject s_kobj;
1546 struct completion s_kobj_unregister;
1547 struct super_block *s_sb;
1548 struct buffer_head *s_mmp_bh;
1549
1550
1551 struct journal_s *s_journal;
1552 unsigned long s_ext4_flags;
1553 struct mutex s_orphan_lock;
1554 struct list_head s_orphan;
1555
1556 struct ext4_orphan_info s_orphan_info;
1557 unsigned long s_commit_interval;
1558 u32 s_max_batch_time;
1559 u32 s_min_batch_time;
1560 struct block_device *s_journal_bdev;
1561#ifdef CONFIG_QUOTA
1562
1563 char __rcu *s_qf_names[EXT4_MAXQUOTAS];
1564 int s_jquota_fmt;
1565#endif
1566 unsigned int s_want_extra_isize;
1567 struct ext4_system_blocks __rcu *s_system_blks;
1568
1569#ifdef EXTENTS_STATS
1570
1571 unsigned long s_ext_min;
1572 unsigned long s_ext_max;
1573 unsigned long s_depth_max;
1574 spinlock_t s_ext_stats_lock;
1575 unsigned long s_ext_blocks;
1576 unsigned long s_ext_extents;
1577#endif
1578
1579
1580 struct ext4_group_info ** __rcu *s_group_info;
1581 struct inode *s_buddy_cache;
1582 spinlock_t s_md_lock;
1583 unsigned short *s_mb_offsets;
1584 unsigned int *s_mb_maxs;
1585 unsigned int s_group_info_size;
1586 unsigned int s_mb_free_pending;
1587 struct list_head s_freed_data_list;
1588
1589 struct list_head s_discard_list;
1590 struct work_struct s_discard_work;
1591 atomic_t s_retry_alloc_pending;
1592 struct rb_root s_mb_avg_fragment_size_root;
1593 rwlock_t s_mb_rb_lock;
1594 struct list_head *s_mb_largest_free_orders;
1595 rwlock_t *s_mb_largest_free_orders_locks;
1596
1597
1598 unsigned long s_stripe;
1599 unsigned int s_mb_max_linear_groups;
1600 unsigned int s_mb_stream_request;
1601 unsigned int s_mb_max_to_scan;
1602 unsigned int s_mb_min_to_scan;
1603 unsigned int s_mb_stats;
1604 unsigned int s_mb_order2_reqs;
1605 unsigned int s_mb_group_prealloc;
1606 unsigned int s_mb_max_inode_prealloc;
1607 unsigned int s_max_dir_size_kb;
1608
1609 unsigned long s_mb_last_group;
1610 unsigned long s_mb_last_start;
1611 unsigned int s_mb_prefetch;
1612 unsigned int s_mb_prefetch_limit;
1613
1614
1615 atomic_t s_bal_reqs;
1616 atomic_t s_bal_success;
1617 atomic_t s_bal_allocated;
1618 atomic_t s_bal_ex_scanned;
1619 atomic_t s_bal_groups_scanned;
1620 atomic_t s_bal_goals;
1621 atomic_t s_bal_breaks;
1622 atomic_t s_bal_2orders;
1623 atomic_t s_bal_cr0_bad_suggestions;
1624 atomic_t s_bal_cr1_bad_suggestions;
1625 atomic64_t s_bal_cX_groups_considered[4];
1626 atomic64_t s_bal_cX_hits[4];
1627 atomic64_t s_bal_cX_failed[4];
1628 atomic_t s_mb_buddies_generated;
1629 atomic64_t s_mb_generation_time;
1630 atomic_t s_mb_lost_chunks;
1631 atomic_t s_mb_preallocated;
1632 atomic_t s_mb_discarded;
1633 atomic_t s_lock_busy;
1634
1635
1636 struct ext4_locality_group __percpu *s_locality_groups;
1637
1638
1639 unsigned long s_sectors_written_start;
1640 u64 s_kbytes_written;
1641
1642
1643 unsigned int s_extent_max_zeroout_kb;
1644
1645 unsigned int s_log_groups_per_flex;
1646 struct flex_groups * __rcu *s_flex_groups;
1647 ext4_group_t s_flex_groups_allocated;
1648
1649
1650 struct workqueue_struct *rsv_conversion_wq;
1651
1652
1653 struct timer_list s_err_report;
1654
1655
1656 struct ext4_li_request *s_li_request;
1657
1658 unsigned int s_li_wait_mult;
1659
1660
1661 struct task_struct *s_mmp_tsk;
1662
1663
1664 atomic_t s_last_trim_minblks;
1665
1666
1667 struct crypto_shash *s_chksum_driver;
1668
1669
1670 __u32 s_csum_seed;
1671
1672
1673 struct shrinker s_es_shrinker;
1674 struct list_head s_es_list;
1675 long s_es_nr_inode;
1676 struct ext4_es_stats s_es_stats;
1677 struct mb_cache *s_ea_block_cache;
1678 struct mb_cache *s_ea_inode_cache;
1679 spinlock_t s_es_lock ____cacheline_aligned_in_smp;
1680
1681
1682 struct ext4_journal_trigger s_journal_triggers[EXT4_JOURNAL_TRIGGER_COUNT];
1683
1684
1685 struct ratelimit_state s_err_ratelimit_state;
1686 struct ratelimit_state s_warning_ratelimit_state;
1687 struct ratelimit_state s_msg_ratelimit_state;
1688 atomic_t s_warning_count;
1689 atomic_t s_msg_count;
1690
1691
1692 struct fscrypt_dummy_policy s_dummy_enc_policy;
1693
1694
1695
1696
1697
1698 struct percpu_rw_semaphore s_writepages_rwsem;
1699 struct dax_device *s_daxdev;
1700#ifdef CONFIG_EXT4_DEBUG
1701 unsigned long s_simulate_fail;
1702#endif
1703
1704 errseq_t s_bdev_wb_err;
1705 spinlock_t s_bdev_wb_lock;
1706
1707
1708 spinlock_t s_error_lock;
1709 int s_add_error_count;
1710 int s_first_error_code;
1711 __u32 s_first_error_line;
1712 __u32 s_first_error_ino;
1713 __u64 s_first_error_block;
1714 const char *s_first_error_func;
1715 time64_t s_first_error_time;
1716 int s_last_error_code;
1717 __u32 s_last_error_line;
1718 __u32 s_last_error_ino;
1719 __u64 s_last_error_block;
1720 const char *s_last_error_func;
1721 time64_t s_last_error_time;
1722
1723
1724
1725
1726 struct work_struct s_error_work;
1727
1728
1729 atomic_t s_fc_subtid;
1730 atomic_t s_fc_ineligible_updates;
1731
1732
1733
1734
1735#define FC_Q_MAIN 0
1736#define FC_Q_STAGING 1
1737 struct list_head s_fc_q[2];
1738
1739
1740 struct list_head s_fc_dentry_q[2];
1741 unsigned int s_fc_bytes;
1742
1743
1744
1745
1746
1747 spinlock_t s_fc_lock;
1748 struct buffer_head *s_fc_bh;
1749 struct ext4_fc_stats s_fc_stats;
1750 u64 s_fc_avg_commit_time;
1751#ifdef CONFIG_EXT4_DEBUG
1752 int s_fc_debug_max_replay;
1753#endif
1754 struct ext4_fc_replay_state s_fc_replay_state;
1755};
1756
1757static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1758{
1759 return sb->s_fs_info;
1760}
1761static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1762{
1763 return container_of(inode, struct ext4_inode_info, vfs_inode);
1764}
1765
1766static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
1767{
1768 return ino == EXT4_ROOT_INO ||
1769 (ino >= EXT4_FIRST_INO(sb) &&
1770 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
1771}
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781#define sbi_array_rcu_deref(sbi, field, index) \
1782({ \
1783 typeof(*((sbi)->field)) _v; \
1784 rcu_read_lock(); \
1785 _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \
1786 rcu_read_unlock(); \
1787 _v; \
1788})
1789
1790
1791
1792
1793enum {
1794 EXT4_MF_MNTDIR_SAMPLED,
1795 EXT4_MF_FS_ABORTED,
1796 EXT4_MF_FC_INELIGIBLE,
1797 EXT4_MF_FC_COMMITTING
1798
1799
1800};
1801
1802static inline void ext4_set_mount_flag(struct super_block *sb, int bit)
1803{
1804 set_bit(bit, &EXT4_SB(sb)->s_mount_flags);
1805}
1806
1807static inline void ext4_clear_mount_flag(struct super_block *sb, int bit)
1808{
1809 clear_bit(bit, &EXT4_SB(sb)->s_mount_flags);
1810}
1811
1812static inline int ext4_test_mount_flag(struct super_block *sb, int bit)
1813{
1814 return test_bit(bit, &EXT4_SB(sb)->s_mount_flags);
1815}
1816
1817
1818
1819
1820
1821#define EXT4_SIM_BBITMAP_EIO 1
1822#define EXT4_SIM_BBITMAP_CRC 2
1823#define EXT4_SIM_IBITMAP_EIO 3
1824#define EXT4_SIM_IBITMAP_CRC 4
1825#define EXT4_SIM_INODE_EIO 5
1826#define EXT4_SIM_INODE_CRC 6
1827#define EXT4_SIM_DIRBLOCK_EIO 7
1828#define EXT4_SIM_DIRBLOCK_CRC 8
1829
1830static inline bool ext4_simulate_fail(struct super_block *sb,
1831 unsigned long code)
1832{
1833#ifdef CONFIG_EXT4_DEBUG
1834 struct ext4_sb_info *sbi = EXT4_SB(sb);
1835
1836 if (unlikely(sbi->s_simulate_fail == code)) {
1837 sbi->s_simulate_fail = 0;
1838 return true;
1839 }
1840#endif
1841 return false;
1842}
1843
1844static inline void ext4_simulate_fail_bh(struct super_block *sb,
1845 struct buffer_head *bh,
1846 unsigned long code)
1847{
1848 if (!IS_ERR(bh) && ext4_simulate_fail(sb, code))
1849 clear_buffer_uptodate(bh);
1850}
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860#define EXT4_ERR_UNKNOWN 1
1861#define EXT4_ERR_EIO 2
1862#define EXT4_ERR_ENOMEM 3
1863#define EXT4_ERR_EFSBADCRC 4
1864#define EXT4_ERR_EFSCORRUPTED 5
1865#define EXT4_ERR_ENOSPC 6
1866#define EXT4_ERR_ENOKEY 7
1867#define EXT4_ERR_EROFS 8
1868#define EXT4_ERR_EFBIG 9
1869#define EXT4_ERR_EEXIST 10
1870#define EXT4_ERR_ERANGE 11
1871#define EXT4_ERR_EOVERFLOW 12
1872#define EXT4_ERR_EBUSY 13
1873#define EXT4_ERR_ENOTDIR 14
1874#define EXT4_ERR_ENOTEMPTY 15
1875#define EXT4_ERR_ESHUTDOWN 16
1876#define EXT4_ERR_EFAULT 17
1877
1878
1879
1880
1881enum {
1882 EXT4_STATE_JDATA,
1883 EXT4_STATE_NEW,
1884 EXT4_STATE_XATTR,
1885 EXT4_STATE_NO_EXPAND,
1886 EXT4_STATE_DA_ALLOC_CLOSE,
1887 EXT4_STATE_EXT_MIGRATE,
1888 EXT4_STATE_NEWENTRY,
1889 EXT4_STATE_MAY_INLINE_DATA,
1890 EXT4_STATE_EXT_PRECACHED,
1891 EXT4_STATE_LUSTRE_EA_INODE,
1892 EXT4_STATE_VERITY_IN_PROGRESS,
1893 EXT4_STATE_FC_COMMITTING,
1894 EXT4_STATE_ORPHAN_FILE,
1895};
1896
1897#define EXT4_INODE_BIT_FNS(name, field, offset) \
1898static inline int ext4_test_inode_##name(struct inode *inode, int bit) \
1899{ \
1900 return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1901} \
1902static inline void ext4_set_inode_##name(struct inode *inode, int bit) \
1903{ \
1904 set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1905} \
1906static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
1907{ \
1908 clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1909}
1910
1911
1912
1913static inline int ext4_test_inode_flag(struct inode *inode, int bit);
1914static inline void ext4_set_inode_flag(struct inode *inode, int bit);
1915static inline void ext4_clear_inode_flag(struct inode *inode, int bit);
1916EXT4_INODE_BIT_FNS(flag, flags, 0)
1917
1918
1919
1920static inline int ext4_test_inode_state(struct inode *inode, int bit);
1921static inline void ext4_set_inode_state(struct inode *inode, int bit);
1922static inline void ext4_clear_inode_state(struct inode *inode, int bit);
1923#if (BITS_PER_LONG < 64)
1924EXT4_INODE_BIT_FNS(state, state_flags, 0)
1925
1926static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1927{
1928 (ei)->i_state_flags = 0;
1929}
1930#else
1931EXT4_INODE_BIT_FNS(state, flags, 32)
1932
1933static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1934{
1935
1936}
1937#endif
1938#else
1939
1940
1941
1942#define EXT4_SB(sb) (sb)
1943#endif
1944
1945static inline bool ext4_verity_in_progress(struct inode *inode)
1946{
1947 return IS_ENABLED(CONFIG_FS_VERITY) &&
1948 ext4_test_inode_state(inode, EXT4_STATE_VERITY_IN_PROGRESS);
1949}
1950
1951#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
1952
1953
1954
1955
1956#define EXT4_OS_LINUX 0
1957#define EXT4_OS_HURD 1
1958#define EXT4_OS_MASIX 2
1959#define EXT4_OS_FREEBSD 3
1960#define EXT4_OS_LITES 4
1961
1962
1963
1964
1965#define EXT4_GOOD_OLD_REV 0
1966#define EXT4_DYNAMIC_REV 1
1967
1968#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
1969
1970#define EXT4_GOOD_OLD_INODE_SIZE 128
1971
1972#define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN)
1973#define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX
1974#define EXT4_TIMESTAMP_MIN S32_MIN
1975
1976
1977
1978
1979
1980#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
1981#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
1982#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
1983#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
1984#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
1985#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
1986#define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200
1987
1988
1989
1990
1991
1992
1993
1994#define EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400
1995#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800
1996#define EXT4_FEATURE_COMPAT_ORPHAN_FILE 0x1000
1997
1998#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1999#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
2000#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
2001#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
2002#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
2003#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
2004#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
2005#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
2006#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
2007
2008
2009
2010
2011
2012
2013#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
2014#define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000
2015#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000
2016#define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000
2017#define EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT 0x10000
2018
2019
2020#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
2021#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
2022#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
2023#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
2024#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
2025#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
2026#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
2027#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
2028#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
2029#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
2030#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
2031#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000
2032#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000
2033#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000
2034#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
2035#define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000
2036
2037extern void ext4_update_dynamic_rev(struct super_block *sb);
2038
2039#define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \
2040static inline bool ext4_has_feature_##name(struct super_block *sb) \
2041{ \
2042 return ((EXT4_SB(sb)->s_es->s_feature_compat & \
2043 cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \
2044} \
2045static inline void ext4_set_feature_##name(struct super_block *sb) \
2046{ \
2047 ext4_update_dynamic_rev(sb); \
2048 EXT4_SB(sb)->s_es->s_feature_compat |= \
2049 cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
2050} \
2051static inline void ext4_clear_feature_##name(struct super_block *sb) \
2052{ \
2053 EXT4_SB(sb)->s_es->s_feature_compat &= \
2054 ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
2055}
2056
2057#define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
2058static inline bool ext4_has_feature_##name(struct super_block *sb) \
2059{ \
2060 return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
2061 cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \
2062} \
2063static inline void ext4_set_feature_##name(struct super_block *sb) \
2064{ \
2065 ext4_update_dynamic_rev(sb); \
2066 EXT4_SB(sb)->s_es->s_feature_ro_compat |= \
2067 cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
2068} \
2069static inline void ext4_clear_feature_##name(struct super_block *sb) \
2070{ \
2071 EXT4_SB(sb)->s_es->s_feature_ro_compat &= \
2072 ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
2073}
2074
2075#define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \
2076static inline bool ext4_has_feature_##name(struct super_block *sb) \
2077{ \
2078 return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
2079 cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \
2080} \
2081static inline void ext4_set_feature_##name(struct super_block *sb) \
2082{ \
2083 ext4_update_dynamic_rev(sb); \
2084 EXT4_SB(sb)->s_es->s_feature_incompat |= \
2085 cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
2086} \
2087static inline void ext4_clear_feature_##name(struct super_block *sb) \
2088{ \
2089 EXT4_SB(sb)->s_es->s_feature_incompat &= \
2090 ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
2091}
2092
2093EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC)
2094EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES)
2095EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL)
2096EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR)
2097EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE)
2098EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX)
2099EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2)
2100EXT4_FEATURE_COMPAT_FUNCS(fast_commit, FAST_COMMIT)
2101EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, STABLE_INODES)
2102EXT4_FEATURE_COMPAT_FUNCS(orphan_file, ORPHAN_FILE)
2103
2104EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER)
2105EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE)
2106EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR)
2107EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE)
2108EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM)
2109EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK)
2110EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE)
2111EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA)
2112EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC)
2113EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM)
2114EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY)
2115EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT)
2116EXT4_FEATURE_RO_COMPAT_FUNCS(verity, VERITY)
2117EXT4_FEATURE_RO_COMPAT_FUNCS(orphan_present, ORPHAN_PRESENT)
2118
2119EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION)
2120EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE)
2121EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER)
2122EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV)
2123EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG)
2124EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS)
2125EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT)
2126EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP)
2127EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG)
2128EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE)
2129EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA)
2130EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED)
2131EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR)
2132EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA)
2133EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
2134EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD)
2135
2136#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
2137#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
2138 EXT4_FEATURE_INCOMPAT_META_BG)
2139#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
2140 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
2141 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
2142
2143#define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
2144#define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
2145 EXT4_FEATURE_INCOMPAT_RECOVER| \
2146 EXT4_FEATURE_INCOMPAT_META_BG)
2147#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
2148 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
2149 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
2150
2151#define EXT4_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_EXT_ATTR| \
2152 EXT4_FEATURE_COMPAT_ORPHAN_FILE)
2153#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
2154 EXT4_FEATURE_INCOMPAT_RECOVER| \
2155 EXT4_FEATURE_INCOMPAT_META_BG| \
2156 EXT4_FEATURE_INCOMPAT_EXTENTS| \
2157 EXT4_FEATURE_INCOMPAT_64BIT| \
2158 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
2159 EXT4_FEATURE_INCOMPAT_EA_INODE| \
2160 EXT4_FEATURE_INCOMPAT_MMP | \
2161 EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
2162 EXT4_FEATURE_INCOMPAT_ENCRYPT | \
2163 EXT4_FEATURE_INCOMPAT_CASEFOLD | \
2164 EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
2165 EXT4_FEATURE_INCOMPAT_LARGEDIR)
2166#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
2167 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
2168 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
2169 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
2170 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
2171 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
2172 EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
2173 EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
2174 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
2175 EXT4_FEATURE_RO_COMPAT_QUOTA |\
2176 EXT4_FEATURE_RO_COMPAT_PROJECT |\
2177 EXT4_FEATURE_RO_COMPAT_VERITY |\
2178 EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT)
2179
2180#define EXTN_FEATURE_FUNCS(ver) \
2181static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \
2182{ \
2183 return ((EXT4_SB(sb)->s_es->s_feature_compat & \
2184 cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \
2185} \
2186static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \
2187{ \
2188 return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
2189 cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \
2190} \
2191static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \
2192{ \
2193 return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
2194 cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \
2195}
2196
2197EXTN_FEATURE_FUNCS(2)
2198EXTN_FEATURE_FUNCS(3)
2199EXTN_FEATURE_FUNCS(4)
2200
2201static inline bool ext4_has_compat_features(struct super_block *sb)
2202{
2203 return (EXT4_SB(sb)->s_es->s_feature_compat != 0);
2204}
2205static inline bool ext4_has_ro_compat_features(struct super_block *sb)
2206{
2207 return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0);
2208}
2209static inline bool ext4_has_incompat_features(struct super_block *sb)
2210{
2211 return (EXT4_SB(sb)->s_es->s_feature_incompat != 0);
2212}
2213
2214extern int ext4_feature_set_ok(struct super_block *sb, int readonly);
2215
2216
2217
2218
2219#define EXT4_FLAGS_RESIZING 0
2220#define EXT4_FLAGS_SHUTDOWN 1
2221#define EXT4_FLAGS_BDEV_IS_DAX 2
2222
2223static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi)
2224{
2225 return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
2226}
2227
2228
2229
2230
2231#define EXT4_DEF_RESUID 0
2232#define EXT4_DEF_RESGID 0
2233
2234
2235
2236
2237#define EXT4_DEF_PROJID 0
2238
2239#define EXT4_DEF_INODE_READAHEAD_BLKS 32
2240
2241
2242
2243
2244#define EXT4_DEFM_DEBUG 0x0001
2245#define EXT4_DEFM_BSDGROUPS 0x0002
2246#define EXT4_DEFM_XATTR_USER 0x0004
2247#define EXT4_DEFM_ACL 0x0008
2248#define EXT4_DEFM_UID16 0x0010
2249#define EXT4_DEFM_JMODE 0x0060
2250#define EXT4_DEFM_JMODE_DATA 0x0020
2251#define EXT4_DEFM_JMODE_ORDERED 0x0040
2252#define EXT4_DEFM_JMODE_WBACK 0x0060
2253#define EXT4_DEFM_NOBARRIER 0x0100
2254#define EXT4_DEFM_BLOCK_VALIDITY 0x0200
2255#define EXT4_DEFM_DISCARD 0x0400
2256#define EXT4_DEFM_NODELALLOC 0x0800
2257
2258
2259
2260
2261#define EXT4_DEF_MIN_BATCH_TIME 0
2262#define EXT4_DEF_MAX_BATCH_TIME 15000
2263
2264
2265
2266
2267
2268#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
2269
2270
2271
2272
2273#define EXT4_NAME_LEN 255
2274
2275struct ext4_dir_entry {
2276 __le32 inode;
2277 __le16 rec_len;
2278 __le16 name_len;
2279 char name[EXT4_NAME_LEN];
2280};
2281
2282
2283
2284
2285
2286
2287
2288struct ext4_dir_entry_hash {
2289 __le32 hash;
2290 __le32 minor_hash;
2291};
2292
2293
2294
2295
2296
2297
2298
2299struct ext4_dir_entry_2 {
2300 __le32 inode;
2301 __le16 rec_len;
2302 __u8 name_len;
2303 __u8 file_type;
2304 char name[EXT4_NAME_LEN];
2305};
2306
2307
2308
2309
2310#define EXT4_DIRENT_HASHES(entry) \
2311 ((struct ext4_dir_entry_hash *) \
2312 (((void *)(entry)) + \
2313 ((8 + (entry)->name_len + EXT4_DIR_ROUND) & ~EXT4_DIR_ROUND)))
2314#define EXT4_DIRENT_HASH(entry) le32_to_cpu(EXT4_DIRENT_HASHES(de)->hash)
2315#define EXT4_DIRENT_MINOR_HASH(entry) \
2316 le32_to_cpu(EXT4_DIRENT_HASHES(de)->minor_hash)
2317
2318static inline bool ext4_hash_in_dirent(const struct inode *inode)
2319{
2320 return IS_CASEFOLDED(inode) && IS_ENCRYPTED(inode);
2321}
2322
2323
2324
2325
2326
2327struct ext4_dir_entry_tail {
2328 __le32 det_reserved_zero1;
2329 __le16 det_rec_len;
2330 __u8 det_reserved_zero2;
2331 __u8 det_reserved_ft;
2332 __le32 det_checksum;
2333};
2334
2335#define EXT4_DIRENT_TAIL(block, blocksize) \
2336 ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
2337 ((blocksize) - \
2338 sizeof(struct ext4_dir_entry_tail))))
2339
2340
2341
2342
2343
2344#define EXT4_FT_UNKNOWN 0
2345#define EXT4_FT_REG_FILE 1
2346#define EXT4_FT_DIR 2
2347#define EXT4_FT_CHRDEV 3
2348#define EXT4_FT_BLKDEV 4
2349#define EXT4_FT_FIFO 5
2350#define EXT4_FT_SOCK 6
2351#define EXT4_FT_SYMLINK 7
2352
2353#define EXT4_FT_MAX 8
2354
2355#define EXT4_FT_DIR_CSUM 0xDE
2356
2357
2358
2359
2360
2361
2362#define EXT4_DIR_PAD 4
2363#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
2364#define EXT4_MAX_REC_LEN ((1<<16)-1)
2365
2366
2367
2368
2369
2370
2371
2372static inline unsigned int ext4_dir_rec_len(__u8 name_len,
2373 const struct inode *dir)
2374{
2375 int rec_len = (name_len + 8 + EXT4_DIR_ROUND);
2376
2377 if (dir && ext4_hash_in_dirent(dir))
2378 rec_len += sizeof(struct ext4_dir_entry_hash);
2379 return (rec_len & ~EXT4_DIR_ROUND);
2380}
2381
2382
2383
2384
2385
2386static inline unsigned int
2387ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
2388{
2389 unsigned len = le16_to_cpu(dlen);
2390
2391#if (PAGE_SIZE >= 65536)
2392 if (len == EXT4_MAX_REC_LEN || len == 0)
2393 return blocksize;
2394 return (len & 65532) | ((len & 3) << 16);
2395#else
2396 return len;
2397#endif
2398}
2399
2400static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
2401{
2402 if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
2403 BUG();
2404#if (PAGE_SIZE >= 65536)
2405 if (len < 65536)
2406 return cpu_to_le16(len);
2407 if (len == blocksize) {
2408 if (blocksize == 65536)
2409 return cpu_to_le16(EXT4_MAX_REC_LEN);
2410 else
2411 return cpu_to_le16(0);
2412 }
2413 return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
2414#else
2415 return cpu_to_le16(len);
2416#endif
2417}
2418
2419
2420
2421
2422
2423
2424#define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \
2425 ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
2426#define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \
2427 !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir)))
2428#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
2429
2430
2431
2432#define DX_HASH_LEGACY 0
2433#define DX_HASH_HALF_MD4 1
2434#define DX_HASH_TEA 2
2435#define DX_HASH_LEGACY_UNSIGNED 3
2436#define DX_HASH_HALF_MD4_UNSIGNED 4
2437#define DX_HASH_TEA_UNSIGNED 5
2438#define DX_HASH_SIPHASH 6
2439
2440static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc,
2441 const void *address, unsigned int length)
2442{
2443 struct {
2444 struct shash_desc shash;
2445 char ctx[4];
2446 } desc;
2447
2448 BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx));
2449
2450 desc.shash.tfm = sbi->s_chksum_driver;
2451 *(u32 *)desc.ctx = crc;
2452
2453 BUG_ON(crypto_shash_update(&desc.shash, address, length));
2454
2455 return *(u32 *)desc.ctx;
2456}
2457
2458#ifdef __KERNEL__
2459
2460
2461struct dx_hash_info
2462{
2463 u32 hash;
2464 u32 minor_hash;
2465 int hash_version;
2466 u32 *seed;
2467};
2468
2469
2470
2471#define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1)
2472#define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1)
2473
2474
2475
2476
2477
2478#define HASH_NB_ALWAYS 1
2479
2480struct ext4_filename {
2481 const struct qstr *usr_fname;
2482 struct fscrypt_str disk_name;
2483 struct dx_hash_info hinfo;
2484#ifdef CONFIG_FS_ENCRYPTION
2485 struct fscrypt_str crypto_buf;
2486#endif
2487#ifdef CONFIG_UNICODE
2488 struct fscrypt_str cf_name;
2489#endif
2490};
2491
2492#define fname_name(p) ((p)->disk_name.name)
2493#define fname_usr_name(p) ((p)->usr_fname->name)
2494#define fname_len(p) ((p)->disk_name.len)
2495
2496
2497
2498
2499struct ext4_iloc
2500{
2501 struct buffer_head *bh;
2502 unsigned long offset;
2503 ext4_group_t block_group;
2504};
2505
2506static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
2507{
2508 return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
2509}
2510
2511static inline bool ext4_is_quota_file(struct inode *inode)
2512{
2513 return IS_NOQUOTA(inode) &&
2514 !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL);
2515}
2516
2517
2518
2519
2520
2521
2522struct dir_private_info {
2523 struct rb_root root;
2524 struct rb_node *curr_node;
2525 struct fname *extra_fname;
2526 loff_t last_pos;
2527 __u32 curr_hash;
2528 __u32 curr_minor_hash;
2529 __u32 next_hash;
2530};
2531
2532
2533static inline ext4_fsblk_t
2534ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
2535{
2536 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
2537 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
2538}
2539
2540
2541
2542
2543#define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1))
2544
2545
2546#define EXT4_HTREE_LEVEL_COMPAT 2
2547#define EXT4_HTREE_LEVEL 3
2548
2549static inline int ext4_dir_htree_level(struct super_block *sb)
2550{
2551 return ext4_has_feature_largedir(sb) ?
2552 EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT;
2553}
2554
2555
2556
2557
2558#define EXT4_DEF_LI_WAIT_MULT 10
2559#define EXT4_DEF_LI_MAX_START_DELAY 5
2560#define EXT4_LAZYINIT_QUIT 0x0001
2561#define EXT4_LAZYINIT_RUNNING 0x0002
2562
2563
2564
2565
2566struct ext4_lazy_init {
2567 unsigned long li_state;
2568 struct list_head li_request_list;
2569 struct mutex li_list_mtx;
2570};
2571
2572enum ext4_li_mode {
2573 EXT4_LI_MODE_PREFETCH_BBITMAP,
2574 EXT4_LI_MODE_ITABLE,
2575};
2576
2577struct ext4_li_request {
2578 struct super_block *lr_super;
2579 enum ext4_li_mode lr_mode;
2580 ext4_group_t lr_first_not_zeroed;
2581 ext4_group_t lr_next_group;
2582 struct list_head lr_request;
2583 unsigned long lr_next_sched;
2584 unsigned long lr_timeout;
2585};
2586
2587struct ext4_features {
2588 struct kobject f_kobj;
2589 struct completion f_kobj_unregister;
2590};
2591
2592
2593
2594
2595
2596
2597
2598
2599#define EXT4_MMP_MAGIC 0x004D4D50U
2600#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U
2601#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U
2602#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU
2603
2604struct mmp_struct {
2605 __le32 mmp_magic;
2606 __le32 mmp_seq;
2607
2608
2609
2610
2611
2612 __le64 mmp_time;
2613 char mmp_nodename[64];
2614 char mmp_bdevname[32];
2615
2616
2617
2618
2619
2620
2621 __le16 mmp_check_interval;
2622
2623 __le16 mmp_pad1;
2624 __le32 mmp_pad2[226];
2625 __le32 mmp_checksum;
2626};
2627
2628
2629struct mmpd_data {
2630 struct buffer_head *bh;
2631 struct super_block *sb;
2632};
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642#define EXT4_MMP_CHECK_MULT 2UL
2643
2644
2645
2646
2647#define EXT4_MMP_MIN_CHECK_INTERVAL 5UL
2648
2649
2650
2651
2652#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662# define NORET_TYPE
2663# define ATTRIB_NORET __attribute__((noreturn))
2664# define NORET_AND noreturn,
2665
2666
2667extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
2668void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
2669 struct ext4_group_desc *gdp,
2670 struct buffer_head *bh, int sz);
2671int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
2672 struct ext4_group_desc *gdp,
2673 struct buffer_head *bh, int sz);
2674void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
2675 struct ext4_group_desc *gdp,
2676 struct buffer_head *bh);
2677int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
2678 struct ext4_group_desc *gdp,
2679 struct buffer_head *bh);
2680
2681
2682extern void ext4_get_group_no_and_offset(struct super_block *sb,
2683 ext4_fsblk_t blocknr,
2684 ext4_group_t *blockgrpp,
2685 ext4_grpblk_t *offsetp);
2686extern ext4_group_t ext4_get_group_number(struct super_block *sb,
2687 ext4_fsblk_t block);
2688
2689extern unsigned int ext4_block_group(struct super_block *sb,
2690 ext4_fsblk_t blocknr);
2691extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
2692 ext4_fsblk_t blocknr);
2693extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
2694extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
2695 ext4_group_t group);
2696extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
2697 ext4_fsblk_t goal,
2698 unsigned int flags,
2699 unsigned long *count,
2700 int *errp);
2701extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
2702 s64 nclusters, unsigned int flags);
2703extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *);
2704extern void ext4_check_blocks_bitmap(struct super_block *);
2705extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
2706 ext4_group_t block_group,
2707 struct buffer_head ** bh);
2708extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
2709
2710extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb,
2711 ext4_group_t block_group,
2712 bool ignore_locked);
2713extern int ext4_wait_block_bitmap(struct super_block *sb,
2714 ext4_group_t block_group,
2715 struct buffer_head *bh);
2716extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
2717 ext4_group_t block_group);
2718extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
2719 ext4_group_t block_group,
2720 struct ext4_group_desc *gdp);
2721ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
2722
2723#ifdef CONFIG_UNICODE
2724extern int ext4_fname_setup_ci_filename(struct inode *dir,
2725 const struct qstr *iname,
2726 struct ext4_filename *fname);
2727#endif
2728
2729#ifdef CONFIG_FS_ENCRYPTION
2730static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst,
2731 const struct fscrypt_name *src)
2732{
2733 memset(dst, 0, sizeof(*dst));
2734
2735 dst->usr_fname = src->usr_fname;
2736 dst->disk_name = src->disk_name;
2737 dst->hinfo.hash = src->hash;
2738 dst->hinfo.minor_hash = src->minor_hash;
2739 dst->crypto_buf = src->crypto_buf;
2740}
2741
2742static inline int ext4_fname_setup_filename(struct inode *dir,
2743 const struct qstr *iname,
2744 int lookup,
2745 struct ext4_filename *fname)
2746{
2747 struct fscrypt_name name;
2748 int err;
2749
2750 err = fscrypt_setup_filename(dir, iname, lookup, &name);
2751 if (err)
2752 return err;
2753
2754 ext4_fname_from_fscrypt_name(fname, &name);
2755
2756#ifdef CONFIG_UNICODE
2757 err = ext4_fname_setup_ci_filename(dir, iname, fname);
2758#endif
2759 return err;
2760}
2761
2762static inline int ext4_fname_prepare_lookup(struct inode *dir,
2763 struct dentry *dentry,
2764 struct ext4_filename *fname)
2765{
2766 struct fscrypt_name name;
2767 int err;
2768
2769 err = fscrypt_prepare_lookup(dir, dentry, &name);
2770 if (err)
2771 return err;
2772
2773 ext4_fname_from_fscrypt_name(fname, &name);
2774
2775#ifdef CONFIG_UNICODE
2776 err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
2777#endif
2778 return err;
2779}
2780
2781static inline void ext4_fname_free_filename(struct ext4_filename *fname)
2782{
2783 struct fscrypt_name name;
2784
2785 name.crypto_buf = fname->crypto_buf;
2786 fscrypt_free_filename(&name);
2787
2788 fname->crypto_buf.name = NULL;
2789 fname->usr_fname = NULL;
2790 fname->disk_name.name = NULL;
2791
2792#ifdef CONFIG_UNICODE
2793 kfree(fname->cf_name.name);
2794 fname->cf_name.name = NULL;
2795#endif
2796}
2797#else
2798static inline int ext4_fname_setup_filename(struct inode *dir,
2799 const struct qstr *iname,
2800 int lookup,
2801 struct ext4_filename *fname)
2802{
2803 int err = 0;
2804 fname->usr_fname = iname;
2805 fname->disk_name.name = (unsigned char *) iname->name;
2806 fname->disk_name.len = iname->len;
2807
2808#ifdef CONFIG_UNICODE
2809 err = ext4_fname_setup_ci_filename(dir, iname, fname);
2810#endif
2811
2812 return err;
2813}
2814
2815static inline int ext4_fname_prepare_lookup(struct inode *dir,
2816 struct dentry *dentry,
2817 struct ext4_filename *fname)
2818{
2819 return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname);
2820}
2821
2822static inline void ext4_fname_free_filename(struct ext4_filename *fname)
2823{
2824#ifdef CONFIG_UNICODE
2825 kfree(fname->cf_name.name);
2826 fname->cf_name.name = NULL;
2827#endif
2828}
2829#endif
2830
2831
2832extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
2833 struct file *,
2834 struct ext4_dir_entry_2 *,
2835 struct buffer_head *, char *, int,
2836 unsigned int);
2837#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \
2838 unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
2839 (de), (bh), (buf), (size), (offset)))
2840extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
2841 __u32 minor_hash,
2842 struct ext4_dir_entry_2 *dirent,
2843 struct fscrypt_str *ent_name);
2844extern void ext4_htree_free_dir_info(struct dir_private_info *p);
2845extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
2846 struct buffer_head *bh,
2847 void *buf, int buf_size,
2848 struct ext4_filename *fname,
2849 struct ext4_dir_entry_2 **dest_de);
2850void ext4_insert_dentry(struct inode *dir, struct inode *inode,
2851 struct ext4_dir_entry_2 *de,
2852 int buf_size,
2853 struct ext4_filename *fname);
2854static inline void ext4_update_dx_flag(struct inode *inode)
2855{
2856 if (!ext4_has_feature_dir_index(inode->i_sb) &&
2857 ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) {
2858
2859 WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb));
2860 ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
2861 }
2862}
2863static const unsigned char ext4_filetype_table[] = {
2864 DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
2865};
2866
2867static inline unsigned char get_dtype(struct super_block *sb, int filetype)
2868{
2869 if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX)
2870 return DT_UNKNOWN;
2871
2872 return ext4_filetype_table[filetype];
2873}
2874extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
2875 void *buf, int buf_size);
2876
2877
2878extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
2879
2880
2881extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
2882 struct dx_hash_info *hinfo);
2883
2884
2885extern int ext4_mark_inode_used(struct super_block *sb, int ino);
2886extern struct inode *__ext4_new_inode(struct user_namespace *, handle_t *,
2887 struct inode *, umode_t,
2888 const struct qstr *qstr, __u32 goal,
2889 uid_t *owner, __u32 i_flags,
2890 int handle_type, unsigned int line_no,
2891 int nblocks);
2892
2893#define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \
2894 __ext4_new_inode(&init_user_ns, (handle), (dir), (mode), (qstr), \
2895 (goal), (owner), i_flags, 0, 0, 0)
2896#define ext4_new_inode_start_handle(mnt_userns, dir, mode, qstr, goal, owner, \
2897 type, nblocks) \
2898 __ext4_new_inode((mnt_userns), NULL, (dir), (mode), (qstr), (goal), (owner), \
2899 0, (type), __LINE__, (nblocks))
2900
2901
2902extern void ext4_free_inode(handle_t *, struct inode *);
2903extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
2904extern unsigned long ext4_count_free_inodes(struct super_block *);
2905extern unsigned long ext4_count_dirs(struct super_block *);
2906extern void ext4_check_inodes_bitmap(struct super_block *);
2907extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
2908extern int ext4_init_inode_table(struct super_block *sb,
2909 ext4_group_t group, int barrier);
2910extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
2911
2912
2913int ext4_fc_info_show(struct seq_file *seq, void *v);
2914void ext4_fc_init(struct super_block *sb, journal_t *journal);
2915void ext4_fc_init_inode(struct inode *inode);
2916void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t start,
2917 ext4_lblk_t end);
2918void __ext4_fc_track_unlink(handle_t *handle, struct inode *inode,
2919 struct dentry *dentry);
2920void __ext4_fc_track_link(handle_t *handle, struct inode *inode,
2921 struct dentry *dentry);
2922void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry);
2923void ext4_fc_track_link(handle_t *handle, struct dentry *dentry);
2924void __ext4_fc_track_create(handle_t *handle, struct inode *inode,
2925 struct dentry *dentry);
2926void ext4_fc_track_create(handle_t *handle, struct dentry *dentry);
2927void ext4_fc_track_inode(handle_t *handle, struct inode *inode);
2928void ext4_fc_mark_ineligible(struct super_block *sb, int reason);
2929void ext4_fc_start_ineligible(struct super_block *sb, int reason);
2930void ext4_fc_stop_ineligible(struct super_block *sb);
2931void ext4_fc_start_update(struct inode *inode);
2932void ext4_fc_stop_update(struct inode *inode);
2933void ext4_fc_del(struct inode *inode);
2934bool ext4_fc_replay_check_excluded(struct super_block *sb, ext4_fsblk_t block);
2935void ext4_fc_replay_cleanup(struct super_block *sb);
2936int ext4_fc_commit(journal_t *journal, tid_t commit_tid);
2937int __init ext4_fc_init_dentry_cache(void);
2938
2939
2940extern const struct seq_operations ext4_mb_seq_groups_ops;
2941extern const struct seq_operations ext4_mb_seq_structs_summary_ops;
2942extern long ext4_mb_stats;
2943extern long ext4_mb_max_to_scan;
2944extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset);
2945extern int ext4_mb_init(struct super_block *);
2946extern int ext4_mb_release(struct super_block *);
2947extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
2948 struct ext4_allocation_request *, int *);
2949extern int ext4_mb_reserve_blocks(struct super_block *, int);
2950extern void ext4_discard_preallocations(struct inode *, unsigned int);
2951extern int __init ext4_init_mballoc(void);
2952extern void ext4_exit_mballoc(void);
2953extern ext4_group_t ext4_mb_prefetch(struct super_block *sb,
2954 ext4_group_t group,
2955 unsigned int nr, int *cnt);
2956extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
2957 unsigned int nr);
2958
2959extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
2960 struct buffer_head *bh, ext4_fsblk_t block,
2961 unsigned long count, int flags);
2962extern int ext4_mb_alloc_groupinfo(struct super_block *sb,
2963 ext4_group_t ngroups);
2964extern int ext4_mb_add_groupinfo(struct super_block *sb,
2965 ext4_group_t i, struct ext4_group_desc *desc);
2966extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
2967 ext4_fsblk_t block, unsigned long count);
2968extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
2969extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid);
2970extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
2971 int len, int state);
2972
2973
2974void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
2975 struct ext4_inode_info *ei);
2976int ext4_inode_is_fast_symlink(struct inode *inode);
2977struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int);
2978struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int);
2979int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count,
2980 bool wait, struct buffer_head **bhs);
2981int ext4_get_block_unwritten(struct inode *inode, sector_t iblock,
2982 struct buffer_head *bh_result, int create);
2983int ext4_get_block(struct inode *inode, sector_t iblock,
2984 struct buffer_head *bh_result, int create);
2985int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
2986 struct buffer_head *bh, int create);
2987int ext4_walk_page_buffers(handle_t *handle,
2988 struct inode *inode,
2989 struct buffer_head *head,
2990 unsigned from,
2991 unsigned to,
2992 int *partial,
2993 int (*fn)(handle_t *handle, struct inode *inode,
2994 struct buffer_head *bh));
2995int do_journal_get_write_access(handle_t *handle, struct inode *inode,
2996 struct buffer_head *bh);
2997#define FALL_BACK_TO_NONDELALLOC 1
2998#define CONVERT_INLINE_DATA 2
2999
3000typedef enum {
3001 EXT4_IGET_NORMAL = 0,
3002 EXT4_IGET_SPECIAL = 0x0001,
3003 EXT4_IGET_HANDLE = 0x0002
3004} ext4_iget_flags;
3005
3006extern struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
3007 ext4_iget_flags flags, const char *function,
3008 unsigned int line);
3009
3010#define ext4_iget(sb, ino, flags) \
3011 __ext4_iget((sb), (ino), (flags), __func__, __LINE__)
3012
3013extern int ext4_write_inode(struct inode *, struct writeback_control *);
3014extern int ext4_setattr(struct user_namespace *, struct dentry *,
3015 struct iattr *);
3016extern int ext4_getattr(struct user_namespace *, const struct path *,
3017 struct kstat *, u32, unsigned int);
3018extern void ext4_evict_inode(struct inode *);
3019extern void ext4_clear_inode(struct inode *);
3020extern int ext4_file_getattr(struct user_namespace *, const struct path *,
3021 struct kstat *, u32, unsigned int);
3022extern int ext4_sync_inode(handle_t *, struct inode *);
3023extern void ext4_dirty_inode(struct inode *, int);
3024extern int ext4_change_inode_journal_flag(struct inode *, int);
3025extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
3026extern int ext4_get_fc_inode_loc(struct super_block *sb, unsigned long ino,
3027 struct ext4_iloc *iloc);
3028extern int ext4_inode_attach_jinode(struct inode *inode);
3029extern int ext4_can_truncate(struct inode *inode);
3030extern int ext4_truncate(struct inode *);
3031extern int ext4_break_layouts(struct inode *);
3032extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length);
3033extern void ext4_set_inode_flags(struct inode *, bool init);
3034extern int ext4_alloc_da_blocks(struct inode *inode);
3035extern void ext4_set_aops(struct inode *inode);
3036extern int ext4_writepage_trans_blocks(struct inode *);
3037extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
3038extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
3039 loff_t lstart, loff_t lend);
3040extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf);
3041extern qsize_t *ext4_get_reserved_space(struct inode *inode);
3042extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
3043extern void ext4_da_release_space(struct inode *inode, int to_free);
3044extern void ext4_da_update_reserve_space(struct inode *inode,
3045 int used, int quota_claim);
3046extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk,
3047 ext4_fsblk_t pblk, ext4_lblk_t len);
3048
3049
3050extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
3051 struct ext4_map_blocks *map, int flags);
3052extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
3053extern void ext4_ind_truncate(handle_t *, struct inode *inode);
3054extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
3055 ext4_lblk_t start, ext4_lblk_t end);
3056
3057
3058extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
3059extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
3060int ext4_fileattr_set(struct user_namespace *mnt_userns,
3061 struct dentry *dentry, struct fileattr *fa);
3062int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa);
3063extern void ext4_reset_inode_seed(struct inode *inode);
3064
3065
3066extern int ext4_ext_migrate(struct inode *);
3067extern int ext4_ind_migrate(struct inode *inode);
3068
3069
3070extern int ext4_init_new_dir(handle_t *handle, struct inode *dir,
3071 struct inode *inode);
3072extern int ext4_dirblock_csum_verify(struct inode *inode,
3073 struct buffer_head *bh);
3074extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
3075 __u32 start_minor_hash, __u32 *next_hash);
3076extern int ext4_search_dir(struct buffer_head *bh,
3077 char *search_buf,
3078 int buf_size,
3079 struct inode *dir,
3080 struct ext4_filename *fname,
3081 unsigned int offset,
3082 struct ext4_dir_entry_2 **res_dir);
3083extern int ext4_generic_delete_entry(struct inode *dir,
3084 struct ext4_dir_entry_2 *de_del,
3085 struct buffer_head *bh,
3086 void *entry_buf,
3087 int buf_size,
3088 int csum_size);
3089extern bool ext4_empty_dir(struct inode *inode);
3090
3091
3092extern void ext4_kvfree_array_rcu(void *to_free);
3093extern int ext4_group_add(struct super_block *sb,
3094 struct ext4_new_group_data *input);
3095extern int ext4_group_extend(struct super_block *sb,
3096 struct ext4_super_block *es,
3097 ext4_fsblk_t n_blocks_count);
3098extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
3099
3100
3101extern struct buffer_head *ext4_sb_bread(struct super_block *sb,
3102 sector_t block, int op_flags);
3103extern struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb,
3104 sector_t block);
3105extern void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags,
3106 bh_end_io_t *end_io);
3107extern int ext4_read_bh(struct buffer_head *bh, int op_flags,
3108 bh_end_io_t *end_io);
3109extern int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait);
3110extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block);
3111extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
3112extern int ext4_calculate_overhead(struct super_block *sb);
3113extern void ext4_superblock_csum_set(struct super_block *sb);
3114extern int ext4_alloc_flex_bg_array(struct super_block *sb,
3115 ext4_group_t ngroup);
3116extern const char *ext4_decode_error(struct super_block *sb, int errno,
3117 char nbuf[16]);
3118extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
3119 ext4_group_t block_group,
3120 unsigned int flags);
3121
3122extern __printf(7, 8)
3123void __ext4_error(struct super_block *, const char *, unsigned int, bool,
3124 int, __u64, const char *, ...);
3125extern __printf(6, 7)
3126void __ext4_error_inode(struct inode *, const char *, unsigned int,
3127 ext4_fsblk_t, int, const char *, ...);
3128extern __printf(5, 6)
3129void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t,
3130 const char *, ...);
3131extern void __ext4_std_error(struct super_block *, const char *,
3132 unsigned int, int);
3133extern __printf(4, 5)
3134void __ext4_warning(struct super_block *, const char *, unsigned int,
3135 const char *, ...);
3136extern __printf(4, 5)
3137void __ext4_warning_inode(const struct inode *inode, const char *function,
3138 unsigned int line, const char *fmt, ...);
3139extern __printf(3, 4)
3140void __ext4_msg(struct super_block *, const char *, const char *, ...);
3141extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
3142 const char *, unsigned int, const char *);
3143extern __printf(7, 8)
3144void __ext4_grp_locked_error(const char *, unsigned int,
3145 struct super_block *, ext4_group_t,
3146 unsigned long, ext4_fsblk_t,
3147 const char *, ...);
3148
3149#define EXT4_ERROR_INODE(inode, fmt, a...) \
3150 ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
3151
3152#define EXT4_ERROR_INODE_ERR(inode, err, fmt, a...) \
3153 __ext4_error_inode((inode), __func__, __LINE__, 0, (err), (fmt), ## a)
3154
3155#define ext4_error_inode_block(inode, block, err, fmt, a...) \
3156 __ext4_error_inode((inode), __func__, __LINE__, (block), (err), \
3157 (fmt), ## a)
3158
3159#define EXT4_ERROR_FILE(file, block, fmt, a...) \
3160 ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a)
3161
3162#define ext4_abort(sb, err, fmt, a...) \
3163 __ext4_error((sb), __func__, __LINE__, true, (err), 0, (fmt), ## a)
3164
3165#ifdef CONFIG_PRINTK
3166
3167#define ext4_error_inode(inode, func, line, block, fmt, ...) \
3168 __ext4_error_inode(inode, func, line, block, 0, fmt, ##__VA_ARGS__)
3169#define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \
3170 __ext4_error_inode((inode), (func), (line), (block), \
3171 (err), (fmt), ##__VA_ARGS__)
3172#define ext4_error_file(file, func, line, block, fmt, ...) \
3173 __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__)
3174#define ext4_error(sb, fmt, ...) \
3175 __ext4_error((sb), __func__, __LINE__, false, 0, 0, (fmt), \
3176 ##__VA_ARGS__)
3177#define ext4_error_err(sb, err, fmt, ...) \
3178 __ext4_error((sb), __func__, __LINE__, false, (err), 0, (fmt), \
3179 ##__VA_ARGS__)
3180#define ext4_warning(sb, fmt, ...) \
3181 __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
3182#define ext4_warning_inode(inode, fmt, ...) \
3183 __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__)
3184#define ext4_msg(sb, level, fmt, ...) \
3185 __ext4_msg(sb, level, fmt, ##__VA_ARGS__)
3186#define dump_mmp_msg(sb, mmp, msg) \
3187 __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg)
3188#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
3189 __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \
3190 fmt, ##__VA_ARGS__)
3191
3192#else
3193
3194#define ext4_error_inode(inode, func, line, block, fmt, ...) \
3195do { \
3196 no_printk(fmt, ##__VA_ARGS__); \
3197 __ext4_error_inode(inode, "", 0, block, 0, " "); \
3198} while (0)
3199#define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \
3200do { \
3201 no_printk(fmt, ##__VA_ARGS__); \
3202 __ext4_error_inode(inode, "", 0, block, err, " "); \
3203} while (0)
3204#define ext4_error_file(file, func, line, block, fmt, ...) \
3205do { \
3206 no_printk(fmt, ##__VA_ARGS__); \
3207 __ext4_error_file(file, "", 0, block, " "); \
3208} while (0)
3209#define ext4_error(sb, fmt, ...) \
3210do { \
3211 no_printk(fmt, ##__VA_ARGS__); \
3212 __ext4_error(sb, "", 0, false, 0, 0, " "); \
3213} while (0)
3214#define ext4_error_err(sb, err, fmt, ...) \
3215do { \
3216 no_printk(fmt, ##__VA_ARGS__); \
3217 __ext4_error(sb, "", 0, false, err, 0, " "); \
3218} while (0)
3219#define ext4_warning(sb, fmt, ...) \
3220do { \
3221 no_printk(fmt, ##__VA_ARGS__); \
3222 __ext4_warning(sb, "", 0, " "); \
3223} while (0)
3224#define ext4_warning_inode(inode, fmt, ...) \
3225do { \
3226 no_printk(fmt, ##__VA_ARGS__); \
3227 __ext4_warning_inode(inode, "", 0, " "); \
3228} while (0)
3229#define ext4_msg(sb, level, fmt, ...) \
3230do { \
3231 no_printk(fmt, ##__VA_ARGS__); \
3232 __ext4_msg(sb, "", " "); \
3233} while (0)
3234#define dump_mmp_msg(sb, mmp, msg) \
3235 __dump_mmp_msg(sb, mmp, "", 0, "")
3236#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
3237do { \
3238 no_printk(fmt, ##__VA_ARGS__); \
3239 __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \
3240} while (0)
3241
3242#endif
3243
3244extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
3245 struct ext4_group_desc *bg);
3246extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
3247 struct ext4_group_desc *bg);
3248extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
3249 struct ext4_group_desc *bg);
3250extern __u32 ext4_free_group_clusters(struct super_block *sb,
3251 struct ext4_group_desc *bg);
3252extern __u32 ext4_free_inodes_count(struct super_block *sb,
3253 struct ext4_group_desc *bg);
3254extern __u32 ext4_used_dirs_count(struct super_block *sb,
3255 struct ext4_group_desc *bg);
3256extern __u32 ext4_itable_unused_count(struct super_block *sb,
3257 struct ext4_group_desc *bg);
3258extern void ext4_block_bitmap_set(struct super_block *sb,
3259 struct ext4_group_desc *bg, ext4_fsblk_t blk);
3260extern void ext4_inode_bitmap_set(struct super_block *sb,
3261 struct ext4_group_desc *bg, ext4_fsblk_t blk);
3262extern void ext4_inode_table_set(struct super_block *sb,
3263 struct ext4_group_desc *bg, ext4_fsblk_t blk);
3264extern void ext4_free_group_clusters_set(struct super_block *sb,
3265 struct ext4_group_desc *bg,
3266 __u32 count);
3267extern void ext4_free_inodes_set(struct super_block *sb,
3268 struct ext4_group_desc *bg, __u32 count);
3269extern void ext4_used_dirs_set(struct super_block *sb,
3270 struct ext4_group_desc *bg, __u32 count);
3271extern void ext4_itable_unused_set(struct super_block *sb,
3272 struct ext4_group_desc *bg, __u32 count);
3273extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
3274 struct ext4_group_desc *gdp);
3275extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group,
3276 struct ext4_group_desc *gdp);
3277extern int ext4_register_li_request(struct super_block *sb,
3278 ext4_group_t first_not_zeroed);
3279
3280static inline int ext4_has_metadata_csum(struct super_block *sb)
3281{
3282 WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) &&
3283 !EXT4_SB(sb)->s_chksum_driver);
3284
3285 return ext4_has_feature_metadata_csum(sb) &&
3286 (EXT4_SB(sb)->s_chksum_driver != NULL);
3287}
3288
3289static inline int ext4_has_group_desc_csum(struct super_block *sb)
3290{
3291 return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb);
3292}
3293
3294#define ext4_read_incompat_64bit_val(es, name) \
3295 (((es)->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT) \
3296 ? (ext4_fsblk_t)le32_to_cpu(es->name##_hi) << 32 : 0) | \
3297 le32_to_cpu(es->name##_lo))
3298
3299static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
3300{
3301 return ext4_read_incompat_64bit_val(es, s_blocks_count);
3302}
3303
3304static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
3305{
3306 return ext4_read_incompat_64bit_val(es, s_r_blocks_count);
3307}
3308
3309static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
3310{
3311 return ext4_read_incompat_64bit_val(es, s_free_blocks_count);
3312}
3313
3314static inline void ext4_blocks_count_set(struct ext4_super_block *es,
3315 ext4_fsblk_t blk)
3316{
3317 es->s_blocks_count_lo = cpu_to_le32((u32)blk);
3318 es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
3319}
3320
3321static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
3322 ext4_fsblk_t blk)
3323{
3324 es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
3325 es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
3326}
3327
3328static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
3329 ext4_fsblk_t blk)
3330{
3331 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
3332 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
3333}
3334
3335static inline loff_t ext4_isize(struct super_block *sb,
3336 struct ext4_inode *raw_inode)
3337{
3338 if (ext4_has_feature_largedir(sb) ||
3339 S_ISREG(le16_to_cpu(raw_inode->i_mode)))
3340 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
3341 le32_to_cpu(raw_inode->i_size_lo);
3342
3343 return (loff_t) le32_to_cpu(raw_inode->i_size_lo);
3344}
3345
3346static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
3347{
3348 raw_inode->i_size_lo = cpu_to_le32(i_size);
3349 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
3350}
3351
3352static inline
3353struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
3354 ext4_group_t group)
3355{
3356 struct ext4_group_info **grp_info;
3357 long indexv, indexh;
3358 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
3359 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
3360 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
3361 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
3362 return grp_info[indexh];
3363}
3364
3365
3366
3367
3368
3369
3370static inline ext4_group_t ext4_get_groups_count(struct super_block *sb)
3371{
3372 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
3373
3374 smp_rmb();
3375 return ngroups;
3376}
3377
3378static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi,
3379 ext4_group_t block_group)
3380{
3381 return block_group >> sbi->s_log_groups_per_flex;
3382}
3383
3384static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi)
3385{
3386 return 1 << sbi->s_log_groups_per_flex;
3387}
3388
3389#define ext4_std_error(sb, errno) \
3390do { \
3391 if ((errno)) \
3392 __ext4_std_error((sb), __func__, __LINE__, (errno)); \
3393} while (0)
3394
3395#ifdef CONFIG_SMP
3396
3397
3398
3399
3400#define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
3401#else
3402#define EXT4_FREECLUSTERS_WATERMARK 0
3403#endif
3404
3405
3406static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
3407{
3408 WARN_ON_ONCE(S_ISREG(inode->i_mode) &&
3409 !inode_is_locked(inode));
3410 down_write(&EXT4_I(inode)->i_data_sem);
3411 if (newsize > EXT4_I(inode)->i_disksize)
3412 WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize);
3413 up_write(&EXT4_I(inode)->i_data_sem);
3414}
3415
3416
3417static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize)
3418{
3419 int changed = 0;
3420
3421 if (newsize > inode->i_size) {
3422 i_size_write(inode, newsize);
3423 changed = 1;
3424 }
3425 if (newsize > EXT4_I(inode)->i_disksize) {
3426 ext4_update_i_disksize(inode, newsize);
3427 changed |= 2;
3428 }
3429 return changed;
3430}
3431
3432int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset,
3433 loff_t len);
3434
3435struct ext4_group_info {
3436 unsigned long bb_state;
3437#ifdef AGGRESSIVE_CHECK
3438 unsigned long bb_check_counter;
3439#endif
3440 struct rb_root bb_free_root;
3441 ext4_grpblk_t bb_first_free;
3442 ext4_grpblk_t bb_free;
3443 ext4_grpblk_t bb_fragments;
3444 ext4_grpblk_t bb_largest_free_order;
3445 ext4_group_t bb_group;
3446 struct list_head bb_prealloc_list;
3447#ifdef DOUBLE_CHECK
3448 void *bb_bitmap;
3449#endif
3450 struct rw_semaphore alloc_sem;
3451 struct rb_node bb_avg_fragment_size_rb;
3452 struct list_head bb_largest_free_order_node;
3453 ext4_grpblk_t bb_counters[];
3454
3455
3456
3457};
3458
3459#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
3460#define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1
3461#define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2
3462#define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3
3463#define EXT4_GROUP_INFO_BBITMAP_CORRUPT \
3464 (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT)
3465#define EXT4_GROUP_INFO_IBITMAP_CORRUPT \
3466 (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT)
3467#define EXT4_GROUP_INFO_BBITMAP_READ_BIT 4
3468
3469#define EXT4_MB_GRP_NEED_INIT(grp) \
3470 (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
3471#define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \
3472 (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
3473#define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \
3474 (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
3475
3476#define EXT4_MB_GRP_WAS_TRIMMED(grp) \
3477 (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3478#define EXT4_MB_GRP_SET_TRIMMED(grp) \
3479 (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3480#define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \
3481 (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3482#define EXT4_MB_GRP_TEST_AND_SET_READ(grp) \
3483 (test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state)))
3484
3485#define EXT4_MAX_CONTENTION 8
3486#define EXT4_CONTENTION_THRESHOLD 2
3487
3488static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb,
3489 ext4_group_t group)
3490{
3491 return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group);
3492}
3493
3494
3495
3496
3497
3498static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi)
3499{
3500 return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD);
3501}
3502
3503static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
3504{
3505 spinlock_t *lock = ext4_group_lock_ptr(sb, group);
3506 if (spin_trylock(lock))
3507
3508
3509
3510
3511 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0);
3512 else {
3513
3514
3515
3516
3517 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1,
3518 EXT4_MAX_CONTENTION);
3519 spin_lock(lock);
3520 }
3521}
3522
3523static inline void ext4_unlock_group(struct super_block *sb,
3524 ext4_group_t group)
3525{
3526 spin_unlock(ext4_group_lock_ptr(sb, group));
3527}
3528
3529#ifdef CONFIG_QUOTA
3530static inline bool ext4_quota_capable(struct super_block *sb)
3531{
3532 return (test_opt(sb, QUOTA) || ext4_has_feature_quota(sb));
3533}
3534
3535static inline bool ext4_is_quota_journalled(struct super_block *sb)
3536{
3537 struct ext4_sb_info *sbi = EXT4_SB(sb);
3538
3539 return (ext4_has_feature_quota(sb) ||
3540 sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]);
3541}
3542int ext4_enable_quotas(struct super_block *sb);
3543#endif
3544
3545
3546
3547
3548#define ext4_check_indirect_blockref(inode, bh) \
3549 ext4_check_blockref(__func__, __LINE__, inode, \
3550 (__le32 *)(bh)->b_data, \
3551 EXT4_ADDR_PER_BLOCK((inode)->i_sb))
3552
3553#define ext4_ind_check_inode(inode) \
3554 ext4_check_blockref(__func__, __LINE__, inode, \
3555 EXT4_I(inode)->i_data, \
3556 EXT4_NDIR_BLOCKS)
3557
3558
3559
3560
3561
3562
3563extern const struct file_operations ext4_dir_operations;
3564
3565
3566extern const struct inode_operations ext4_file_inode_operations;
3567extern const struct file_operations ext4_file_operations;
3568extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
3569
3570
3571extern int ext4_get_max_inline_size(struct inode *inode);
3572extern int ext4_find_inline_data_nolock(struct inode *inode);
3573extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
3574 unsigned int len);
3575extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
3576
3577extern int ext4_readpage_inline(struct inode *inode, struct page *page);
3578extern int ext4_try_to_write_inline_data(struct address_space *mapping,
3579 struct inode *inode,
3580 loff_t pos, unsigned len,
3581 unsigned flags,
3582 struct page **pagep);
3583extern int ext4_write_inline_data_end(struct inode *inode,
3584 loff_t pos, unsigned len,
3585 unsigned copied,
3586 struct page *page);
3587extern struct buffer_head *
3588ext4_journalled_write_inline_data(struct inode *inode,
3589 unsigned len,
3590 struct page *page);
3591extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
3592 struct inode *inode,
3593 loff_t pos, unsigned len,
3594 unsigned flags,
3595 struct page **pagep,
3596 void **fsdata);
3597extern int ext4_try_add_inline_entry(handle_t *handle,
3598 struct ext4_filename *fname,
3599 struct inode *dir, struct inode *inode);
3600extern int ext4_try_create_inline_dir(handle_t *handle,
3601 struct inode *parent,
3602 struct inode *inode);
3603extern int ext4_read_inline_dir(struct file *filp,
3604 struct dir_context *ctx,
3605 int *has_inline_data);
3606extern int ext4_inlinedir_to_tree(struct file *dir_file,
3607 struct inode *dir, ext4_lblk_t block,
3608 struct dx_hash_info *hinfo,
3609 __u32 start_hash, __u32 start_minor_hash,
3610 int *has_inline_data);
3611extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
3612 struct ext4_filename *fname,
3613 struct ext4_dir_entry_2 **res_dir,
3614 int *has_inline_data);
3615extern int ext4_delete_inline_entry(handle_t *handle,
3616 struct inode *dir,
3617 struct ext4_dir_entry_2 *de_del,
3618 struct buffer_head *bh,
3619 int *has_inline_data);
3620extern bool empty_inline_dir(struct inode *dir, int *has_inline_data);
3621extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
3622 struct ext4_dir_entry_2 **parent_de,
3623 int *retval);
3624extern int ext4_inline_data_fiemap(struct inode *inode,
3625 struct fiemap_extent_info *fieinfo,
3626 int *has_inline, __u64 start, __u64 len);
3627
3628struct iomap;
3629extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap);
3630
3631extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline);
3632
3633extern int ext4_convert_inline_data(struct inode *inode);
3634
3635static inline int ext4_has_inline_data(struct inode *inode)
3636{
3637 return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) &&
3638 EXT4_I(inode)->i_inline_off;
3639}
3640
3641
3642extern const struct inode_operations ext4_dir_inode_operations;
3643extern const struct inode_operations ext4_special_inode_operations;
3644extern struct dentry *ext4_get_parent(struct dentry *child);
3645extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
3646 struct ext4_dir_entry_2 *de,
3647 int blocksize, int csum_size,
3648 unsigned int parent_ino, int dotdot_real_len);
3649extern void ext4_initialize_dirent_tail(struct buffer_head *bh,
3650 unsigned int blocksize);
3651extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode,
3652 struct buffer_head *bh);
3653extern int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name,
3654 struct inode *inode);
3655extern int __ext4_link(struct inode *dir, struct inode *inode,
3656 struct dentry *dentry);
3657
3658#define S_SHIFT 12
3659static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
3660 [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
3661 [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
3662 [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
3663 [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
3664 [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
3665 [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
3666 [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
3667};
3668
3669static inline void ext4_set_de_type(struct super_block *sb,
3670 struct ext4_dir_entry_2 *de,
3671 umode_t mode) {
3672 if (ext4_has_feature_filetype(sb))
3673 de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
3674}
3675
3676
3677extern int ext4_mpage_readpages(struct inode *inode,
3678 struct readahead_control *rac, struct page *page);
3679extern int __init ext4_init_post_read_processing(void);
3680extern void ext4_exit_post_read_processing(void);
3681
3682
3683extern const struct inode_operations ext4_encrypted_symlink_inode_operations;
3684extern const struct inode_operations ext4_symlink_inode_operations;
3685extern const struct inode_operations ext4_fast_symlink_inode_operations;
3686
3687
3688extern void ext4_notify_error_sysfs(struct ext4_sb_info *sbi);
3689extern int ext4_register_sysfs(struct super_block *sb);
3690extern void ext4_unregister_sysfs(struct super_block *sb);
3691extern int __init ext4_init_sysfs(void);
3692extern void ext4_exit_sysfs(void);
3693
3694
3695extern void ext4_release_system_zone(struct super_block *sb);
3696extern int ext4_setup_system_zone(struct super_block *sb);
3697extern int __init ext4_init_system_zone(void);
3698extern void ext4_exit_system_zone(void);
3699extern int ext4_inode_block_valid(struct inode *inode,
3700 ext4_fsblk_t start_blk,
3701 unsigned int count);
3702extern int ext4_check_blockref(const char *, unsigned int,
3703 struct inode *, __le32 *, unsigned int);
3704
3705
3706struct ext4_ext_path;
3707struct ext4_extent;
3708
3709
3710
3711
3712
3713#define EXT_MAX_BLOCKS 0xffffffff
3714
3715extern void ext4_ext_tree_init(handle_t *handle, struct inode *inode);
3716extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
3717extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
3718 struct ext4_map_blocks *map, int flags);
3719extern int ext4_ext_truncate(handle_t *, struct inode *);
3720extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
3721 ext4_lblk_t end);
3722extern void ext4_ext_init(struct super_block *);
3723extern void ext4_ext_release(struct super_block *);
3724extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
3725 loff_t len);
3726extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode,
3727 loff_t offset, ssize_t len);
3728extern int ext4_convert_unwritten_io_end_vec(handle_t *handle,
3729 ext4_io_end_t *io_end);
3730extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
3731 struct ext4_map_blocks *map, int flags);
3732extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
3733 int num,
3734 struct ext4_ext_path *path);
3735extern int ext4_ext_insert_extent(handle_t *, struct inode *,
3736 struct ext4_ext_path **,
3737 struct ext4_extent *, int);
3738extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t,
3739 struct ext4_ext_path **,
3740 int flags);
3741extern void ext4_ext_drop_refs(struct ext4_ext_path *);
3742extern int ext4_ext_check_inode(struct inode *inode);
3743extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path);
3744extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
3745 __u64 start, __u64 len);
3746extern int ext4_get_es_cache(struct inode *inode,
3747 struct fiemap_extent_info *fieinfo,
3748 __u64 start, __u64 len);
3749extern int ext4_ext_precache(struct inode *inode);
3750extern int ext4_swap_extents(handle_t *handle, struct inode *inode1,
3751 struct inode *inode2, ext4_lblk_t lblk1,
3752 ext4_lblk_t lblk2, ext4_lblk_t count,
3753 int mark_unwritten,int *err);
3754extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu);
3755extern int ext4_datasem_ensure_credits(handle_t *handle, struct inode *inode,
3756 int check_cred, int restart_cred,
3757 int revoke_cred);
3758extern void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end);
3759extern int ext4_ext_replay_set_iblocks(struct inode *inode);
3760extern int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start,
3761 int len, int unwritten, ext4_fsblk_t pblk);
3762extern int ext4_ext_clear_bb(struct inode *inode);
3763
3764
3765
3766extern void ext4_double_down_write_data_sem(struct inode *first,
3767 struct inode *second);
3768extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
3769 struct inode *donor_inode);
3770extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
3771 __u64 start_orig, __u64 start_donor,
3772 __u64 len, __u64 *moved_len);
3773
3774
3775extern int __init ext4_init_pageio(void);
3776extern void ext4_exit_pageio(void);
3777extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
3778extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end);
3779extern int ext4_put_io_end(ext4_io_end_t *io_end);
3780extern void ext4_put_io_end_defer(ext4_io_end_t *io_end);
3781extern void ext4_io_submit_init(struct ext4_io_submit *io,
3782 struct writeback_control *wbc);
3783extern void ext4_end_io_rsv_work(struct work_struct *work);
3784extern void ext4_io_submit(struct ext4_io_submit *io);
3785extern int ext4_bio_write_page(struct ext4_io_submit *io,
3786 struct page *page,
3787 int len,
3788 bool keep_towrite);
3789extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end);
3790extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end);
3791
3792
3793extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
3794
3795
3796extern void ext4_stop_mmpd(struct ext4_sb_info *sbi);
3797
3798
3799extern const struct fsverity_operations ext4_verityops;
3800
3801
3802extern int ext4_orphan_add(handle_t *, struct inode *);
3803extern int ext4_orphan_del(handle_t *, struct inode *);
3804extern void ext4_orphan_cleanup(struct super_block *sb,
3805 struct ext4_super_block *es);
3806extern void ext4_release_orphan_info(struct super_block *sb);
3807extern int ext4_init_orphan_info(struct super_block *sb);
3808extern int ext4_orphan_file_empty(struct super_block *sb);
3809extern void ext4_orphan_file_block_trigger(
3810 struct jbd2_buffer_trigger_type *triggers,
3811 struct buffer_head *bh,
3812 void *data, size_t size);
3813
3814
3815
3816
3817
3818
3819#define BH_BITMAP_UPTODATE BH_JBDPrivateStart
3820
3821static inline int bitmap_uptodate(struct buffer_head *bh)
3822{
3823 return (buffer_uptodate(bh) &&
3824 test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state));
3825}
3826static inline void set_bitmap_uptodate(struct buffer_head *bh)
3827{
3828 set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
3829}
3830
3831#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
3832
3833
3834#define EXT4_WQ_HASH_SZ 37
3835#define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\
3836 EXT4_WQ_HASH_SZ])
3837extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
3838
3839extern int ext4_resize_begin(struct super_block *sb);
3840extern void ext4_resize_end(struct super_block *sb);
3841
3842static inline void ext4_set_io_unwritten_flag(struct inode *inode,
3843 struct ext4_io_end *io_end)
3844{
3845 if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
3846 io_end->flag |= EXT4_IO_END_UNWRITTEN;
3847 atomic_inc(&EXT4_I(inode)->i_unwritten);
3848 }
3849}
3850
3851static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end)
3852{
3853 struct inode *inode = io_end->inode;
3854
3855 if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
3856 io_end->flag &= ~EXT4_IO_END_UNWRITTEN;
3857
3858 if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
3859 wake_up_all(ext4_ioend_wq(inode));
3860 }
3861}
3862
3863extern const struct iomap_ops ext4_iomap_ops;
3864extern const struct iomap_ops ext4_iomap_overwrite_ops;
3865extern const struct iomap_ops ext4_iomap_report_ops;
3866
3867static inline int ext4_buffer_uptodate(struct buffer_head *bh)
3868{
3869
3870
3871
3872
3873
3874
3875 if (buffer_write_io_error(bh))
3876 set_buffer_uptodate(bh);
3877 return buffer_uptodate(bh);
3878}
3879
3880#endif
3881
3882#define EFSBADCRC EBADMSG
3883#define EFSCORRUPTED EUCLEAN
3884
3885#endif
3886