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17#ifndef _EXT4_H
18#define _EXT4_H
19
20#include <linux/types.h>
21#include <linux/blkdev.h>
22#include <linux/magic.h>
23#include <linux/jbd2.h>
24#include <linux/quota.h>
25#include <linux/rwsem.h>
26#include <linux/rbtree.h>
27#include <linux/seqlock.h>
28#include <linux/mutex.h>
29#include <linux/timer.h>
30#include <linux/version.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
103typedef int ext4_grpblk_t;
104
105
106typedef unsigned long long ext4_fsblk_t;
107
108
109typedef __u32 ext4_lblk_t;
110
111
112typedef unsigned int ext4_group_t;
113
114enum SHIFT_DIRECTION {
115 SHIFT_LEFT = 0,
116 SHIFT_RIGHT,
117};
118
119
120
121
122
123
124
125
126
127#define EXT4_MB_HINT_MERGE 0x0001
128
129#define EXT4_MB_HINT_RESERVED 0x0002
130
131#define EXT4_MB_HINT_METADATA 0x0004
132
133#define EXT4_MB_HINT_FIRST 0x0008
134
135#define EXT4_MB_HINT_BEST 0x0010
136
137#define EXT4_MB_HINT_DATA 0x0020
138
139#define EXT4_MB_HINT_NOPREALLOC 0x0040
140
141#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
142
143#define EXT4_MB_HINT_GOAL_ONLY 0x0100
144
145#define EXT4_MB_HINT_TRY_GOAL 0x0200
146
147#define EXT4_MB_DELALLOC_RESERVED 0x0400
148
149#define EXT4_MB_STREAM_ALLOC 0x0800
150
151#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
152
153#define EXT4_MB_USE_RESERVED 0x2000
154
155#define EXT4_MB_STRICT_CHECK 0x4000
156
157struct ext4_allocation_request {
158
159 struct inode *inode;
160
161 unsigned int len;
162
163 ext4_lblk_t logical;
164
165 ext4_lblk_t lleft;
166
167 ext4_lblk_t lright;
168
169 ext4_fsblk_t goal;
170
171 ext4_fsblk_t pleft;
172
173 ext4_fsblk_t pright;
174
175 unsigned int flags;
176};
177
178
179
180
181
182
183
184
185#define EXT4_MAP_NEW BIT(BH_New)
186#define EXT4_MAP_MAPPED BIT(BH_Mapped)
187#define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten)
188#define EXT4_MAP_BOUNDARY BIT(BH_Boundary)
189#define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
190 EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY)
191
192struct ext4_map_blocks {
193 ext4_fsblk_t m_pblk;
194 ext4_lblk_t m_lblk;
195 unsigned int m_len;
196 unsigned int m_flags;
197};
198
199
200
201
202struct ext4_system_blocks {
203 struct rb_root root;
204 struct rcu_head rcu;
205};
206
207
208
209
210#define EXT4_IO_END_UNWRITTEN 0x0001
211
212struct ext4_io_end_vec {
213 struct list_head list;
214 loff_t offset;
215 ssize_t size;
216};
217
218
219
220
221
222typedef struct ext4_io_end {
223 struct list_head list;
224 handle_t *handle;
225
226 struct inode *inode;
227 struct bio *bio;
228
229 unsigned int flag;
230 atomic_t count;
231 struct list_head list_vec;
232} ext4_io_end_t;
233
234struct ext4_io_submit {
235 struct writeback_control *io_wbc;
236 struct bio *io_bio;
237 ext4_io_end_t *io_end;
238 sector_t io_next_block;
239};
240
241
242
243
244#define EXT4_BAD_INO 1
245#define EXT4_ROOT_INO 2
246#define EXT4_USR_QUOTA_INO 3
247#define EXT4_GRP_QUOTA_INO 4
248#define EXT4_BOOT_LOADER_INO 5
249#define EXT4_UNDEL_DIR_INO 6
250#define EXT4_RESIZE_INO 7
251#define EXT4_JOURNAL_INO 8
252
253
254#define EXT4_GOOD_OLD_FIRST_INO 11
255
256
257
258
259#define EXT4_LINK_MAX 65000
260
261
262
263
264#define EXT4_MIN_BLOCK_SIZE 1024
265#define EXT4_MAX_BLOCK_SIZE 65536
266#define EXT4_MIN_BLOCK_LOG_SIZE 10
267#define EXT4_MAX_BLOCK_LOG_SIZE 16
268#define EXT4_MAX_CLUSTER_LOG_SIZE 30
269#ifdef __KERNEL__
270# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
271#else
272# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
273#endif
274#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
275#define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \
276 EXT4_SB(s)->s_cluster_bits)
277#ifdef __KERNEL__
278# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
279# define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits)
280#else
281# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
282#endif
283#ifdef __KERNEL__
284#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits)
285#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size)
286#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino)
287#else
288#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
289 EXT4_GOOD_OLD_INODE_SIZE : \
290 (s)->s_inode_size)
291#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
292 EXT4_GOOD_OLD_FIRST_INO : \
293 (s)->s_first_ino)
294#endif
295#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
296#define EXT4_MAX_BLOCKS(size, offset, blkbits) \
297 ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \
298 blkbits))
299
300
301#define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits)
302
303#define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits)
304
305#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \
306 (sbi)->s_cluster_bits)
307
308#define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \
309 ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
310#define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \
311 ~((ext4_lblk_t) (s)->s_cluster_ratio - 1))
312
313#define EXT4_LBLK_CFILL(sbi, lblk) ((lblk) | \
314 ((ext4_lblk_t) (sbi)->s_cluster_ratio - 1))
315
316#define EXT4_PBLK_COFF(s, pblk) ((pblk) & \
317 ((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
318#define EXT4_LBLK_COFF(s, lblk) ((lblk) & \
319 ((ext4_lblk_t) (s)->s_cluster_ratio - 1))
320
321
322
323
324struct ext4_group_desc
325{
326 __le32 bg_block_bitmap_lo;
327 __le32 bg_inode_bitmap_lo;
328 __le32 bg_inode_table_lo;
329 __le16 bg_free_blocks_count_lo;
330 __le16 bg_free_inodes_count_lo;
331 __le16 bg_used_dirs_count_lo;
332 __le16 bg_flags;
333 __le32 bg_exclude_bitmap_lo;
334 __le16 bg_block_bitmap_csum_lo;
335 __le16 bg_inode_bitmap_csum_lo;
336 __le16 bg_itable_unused_lo;
337 __le16 bg_checksum;
338 __le32 bg_block_bitmap_hi;
339 __le32 bg_inode_bitmap_hi;
340 __le32 bg_inode_table_hi;
341 __le16 bg_free_blocks_count_hi;
342 __le16 bg_free_inodes_count_hi;
343 __le16 bg_used_dirs_count_hi;
344 __le16 bg_itable_unused_hi;
345 __le32 bg_exclude_bitmap_hi;
346 __le16 bg_block_bitmap_csum_hi;
347 __le16 bg_inode_bitmap_csum_hi;
348 __u32 bg_reserved;
349};
350
351#define EXT4_BG_INODE_BITMAP_CSUM_HI_END \
352 (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \
353 sizeof(__le16))
354#define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \
355 (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \
356 sizeof(__le16))
357
358
359
360
361
362struct flex_groups {
363 atomic64_t free_clusters;
364 atomic_t free_inodes;
365 atomic_t used_dirs;
366};
367
368#define EXT4_BG_INODE_UNINIT 0x0001
369#define EXT4_BG_BLOCK_UNINIT 0x0002
370#define EXT4_BG_INODE_ZEROED 0x0004
371
372
373
374
375#define EXT4_MIN_DESC_SIZE 32
376#define EXT4_MIN_DESC_SIZE_64BIT 64
377#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
378#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
379#ifdef __KERNEL__
380# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group)
381# define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group)
382# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block)
383# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group)
384# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits)
385#else
386# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
387# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
388# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
389#endif
390
391
392
393
394#define EXT4_NDIR_BLOCKS 12
395#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
396#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
397#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
398#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
399
400
401
402
403#define EXT4_SECRM_FL 0x00000001
404#define EXT4_UNRM_FL 0x00000002
405#define EXT4_COMPR_FL 0x00000004
406#define EXT4_SYNC_FL 0x00000008
407#define EXT4_IMMUTABLE_FL 0x00000010
408#define EXT4_APPEND_FL 0x00000020
409#define EXT4_NODUMP_FL 0x00000040
410#define EXT4_NOATIME_FL 0x00000080
411
412#define EXT4_DIRTY_FL 0x00000100
413#define EXT4_COMPRBLK_FL 0x00000200
414#define EXT4_NOCOMPR_FL 0x00000400
415
416#define EXT4_ENCRYPT_FL 0x00000800
417
418#define EXT4_INDEX_FL 0x00001000
419#define EXT4_IMAGIC_FL 0x00002000
420#define EXT4_JOURNAL_DATA_FL 0x00004000
421#define EXT4_NOTAIL_FL 0x00008000
422#define EXT4_DIRSYNC_FL 0x00010000
423#define EXT4_TOPDIR_FL 0x00020000
424#define EXT4_HUGE_FILE_FL 0x00040000
425#define EXT4_EXTENTS_FL 0x00080000
426#define EXT4_VERITY_FL 0x00100000
427#define EXT4_EA_INODE_FL 0x00200000
428
429
430#define EXT4_DAX_FL 0x02000000
431
432#define EXT4_INLINE_DATA_FL 0x10000000
433#define EXT4_PROJINHERIT_FL 0x20000000
434#define EXT4_CASEFOLD_FL 0x40000000
435#define EXT4_RESERVED_FL 0x80000000
436
437
438#define EXT4_FL_USER_MODIFIABLE (EXT4_SECRM_FL | \
439 EXT4_UNRM_FL | \
440 EXT4_COMPR_FL | \
441 EXT4_SYNC_FL | \
442 EXT4_IMMUTABLE_FL | \
443 EXT4_APPEND_FL | \
444 EXT4_NODUMP_FL | \
445 EXT4_NOATIME_FL | \
446 EXT4_JOURNAL_DATA_FL | \
447 EXT4_NOTAIL_FL | \
448 EXT4_DIRSYNC_FL | \
449 EXT4_TOPDIR_FL | \
450 EXT4_EXTENTS_FL | \
451 0x00400000 | \
452 EXT4_DAX_FL | \
453 EXT4_PROJINHERIT_FL | \
454 EXT4_CASEFOLD_FL)
455
456
457#define EXT4_FL_USER_VISIBLE (EXT4_FL_USER_MODIFIABLE | \
458 EXT4_DIRTY_FL | \
459 EXT4_COMPRBLK_FL | \
460 EXT4_NOCOMPR_FL | \
461 EXT4_ENCRYPT_FL | \
462 EXT4_INDEX_FL | \
463 EXT4_VERITY_FL | \
464 EXT4_INLINE_DATA_FL)
465
466
467#define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \
468 EXT4_IMMUTABLE_FL | \
469 EXT4_APPEND_FL | \
470 EXT4_NODUMP_FL | \
471 EXT4_NOATIME_FL | \
472 EXT4_PROJINHERIT_FL | \
473 EXT4_DAX_FL)
474
475
476#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
477 EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
478 EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
479 EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\
480 EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL |\
481 EXT4_DAX_FL)
482
483
484#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\
485 EXT4_PROJINHERIT_FL))
486
487
488#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
489
490
491#define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL)
492
493
494#define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\
495 EXT4_JOURNAL_DATA_FL)
496
497
498static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
499{
500 if (S_ISDIR(mode))
501 return flags;
502 else if (S_ISREG(mode))
503 return flags & EXT4_REG_FLMASK;
504 else
505 return flags & EXT4_OTHER_FLMASK;
506}
507
508
509
510
511enum {
512 EXT4_INODE_SECRM = 0,
513 EXT4_INODE_UNRM = 1,
514 EXT4_INODE_COMPR = 2,
515 EXT4_INODE_SYNC = 3,
516 EXT4_INODE_IMMUTABLE = 4,
517 EXT4_INODE_APPEND = 5,
518 EXT4_INODE_NODUMP = 6,
519 EXT4_INODE_NOATIME = 7,
520
521 EXT4_INODE_DIRTY = 8,
522 EXT4_INODE_COMPRBLK = 9,
523 EXT4_INODE_NOCOMPR = 10,
524 EXT4_INODE_ENCRYPT = 11,
525
526 EXT4_INODE_INDEX = 12,
527 EXT4_INODE_IMAGIC = 13,
528 EXT4_INODE_JOURNAL_DATA = 14,
529 EXT4_INODE_NOTAIL = 15,
530 EXT4_INODE_DIRSYNC = 16,
531 EXT4_INODE_TOPDIR = 17,
532 EXT4_INODE_HUGE_FILE = 18,
533 EXT4_INODE_EXTENTS = 19,
534 EXT4_INODE_VERITY = 20,
535 EXT4_INODE_EA_INODE = 21,
536
537 EXT4_INODE_DAX = 25,
538 EXT4_INODE_INLINE_DATA = 28,
539 EXT4_INODE_PROJINHERIT = 29,
540 EXT4_INODE_CASEFOLD = 30,
541 EXT4_INODE_RESERVED = 31,
542};
543
544
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551
552
553
554
555
556
557#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
558#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
559
560static inline void ext4_check_flag_values(void)
561{
562 CHECK_FLAG_VALUE(SECRM);
563 CHECK_FLAG_VALUE(UNRM);
564 CHECK_FLAG_VALUE(COMPR);
565 CHECK_FLAG_VALUE(SYNC);
566 CHECK_FLAG_VALUE(IMMUTABLE);
567 CHECK_FLAG_VALUE(APPEND);
568 CHECK_FLAG_VALUE(NODUMP);
569 CHECK_FLAG_VALUE(NOATIME);
570 CHECK_FLAG_VALUE(DIRTY);
571 CHECK_FLAG_VALUE(COMPRBLK);
572 CHECK_FLAG_VALUE(NOCOMPR);
573 CHECK_FLAG_VALUE(ENCRYPT);
574 CHECK_FLAG_VALUE(INDEX);
575 CHECK_FLAG_VALUE(IMAGIC);
576 CHECK_FLAG_VALUE(JOURNAL_DATA);
577 CHECK_FLAG_VALUE(NOTAIL);
578 CHECK_FLAG_VALUE(DIRSYNC);
579 CHECK_FLAG_VALUE(TOPDIR);
580 CHECK_FLAG_VALUE(HUGE_FILE);
581 CHECK_FLAG_VALUE(EXTENTS);
582 CHECK_FLAG_VALUE(VERITY);
583 CHECK_FLAG_VALUE(EA_INODE);
584 CHECK_FLAG_VALUE(INLINE_DATA);
585 CHECK_FLAG_VALUE(PROJINHERIT);
586 CHECK_FLAG_VALUE(CASEFOLD);
587 CHECK_FLAG_VALUE(RESERVED);
588}
589
590
591struct ext4_new_group_input {
592 __u32 group;
593 __u64 block_bitmap;
594 __u64 inode_bitmap;
595 __u64 inode_table;
596 __u32 blocks_count;
597 __u16 reserved_blocks;
598 __u16 unused;
599};
600
601#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
602struct compat_ext4_new_group_input {
603 u32 group;
604 compat_u64 block_bitmap;
605 compat_u64 inode_bitmap;
606 compat_u64 inode_table;
607 u32 blocks_count;
608 u16 reserved_blocks;
609 u16 unused;
610};
611#endif
612
613
614struct ext4_new_group_data {
615 __u32 group;
616 __u64 block_bitmap;
617 __u64 inode_bitmap;
618 __u64 inode_table;
619 __u32 blocks_count;
620 __u16 reserved_blocks;
621 __u16 mdata_blocks;
622 __u32 free_clusters_count;
623};
624
625
626enum {
627 BLOCK_BITMAP = 0,
628 INODE_BITMAP,
629 INODE_TABLE,
630 GROUP_TABLE_COUNT,
631};
632
633
634
635
636
637
638#define EXT4_GET_BLOCKS_CREATE 0x0001
639
640#define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002
641#define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\
642 EXT4_GET_BLOCKS_CREATE)
643
644
645#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
646
647
648
649#define EXT4_GET_BLOCKS_PRE_IO 0x0008
650#define EXT4_GET_BLOCKS_CONVERT 0x0010
651#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
652 EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
653
654#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
655 EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
656
657
658#define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020
659
660#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
661
662#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100
663
664#define EXT4_GET_BLOCKS_ZERO 0x0200
665#define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\
666 EXT4_GET_BLOCKS_ZERO)
667
668
669#define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400
670
671
672
673
674
675
676
677
678
679
680#define EXT4_EX_NOCACHE 0x40000000
681#define EXT4_EX_FORCE_CACHE 0x20000000
682#define EXT4_EX_NOFAIL 0x10000000
683
684
685
686
687#define EXT4_FREE_BLOCKS_METADATA 0x0001
688#define EXT4_FREE_BLOCKS_FORGET 0x0002
689#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
690#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
691#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010
692#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020
693#define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040
694
695
696
697
698#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
699#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
700#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
701#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
702#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
703#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
704#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
705#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
706#define EXT4_IOC_MIGRATE _IO('f', 9)
707
708
709#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
710#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
711#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
712#define EXT4_IOC_SWAP_BOOT _IO('f', 17)
713#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18)
714
715#define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40)
716#define EXT4_IOC_GETSTATE _IOW('f', 41, __u32)
717#define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap)
718
719#define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32)
720
721
722
723
724#define EXT4_GOING_FLAGS_DEFAULT 0x0
725#define EXT4_GOING_FLAGS_LOGFLUSH 0x1
726#define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2
727
728
729
730
731
732
733
734#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001
735#define EXT4_STATE_FLAG_NEW 0x00000002
736#define EXT4_STATE_FLAG_NEWENTRY 0x00000004
737#define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008
738
739#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
740
741
742
743#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
744#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
745#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
746#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
747#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
748#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input)
749#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
750#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
751#endif
752
753
754
755
756
757#define EXT4_FIEMAP_EXTENT_HOLE 0x08000000
758
759
760#define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
761
762
763#define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFE
764
765
766
767
768struct ext4_inode {
769 __le16 i_mode;
770 __le16 i_uid;
771 __le32 i_size_lo;
772 __le32 i_atime;
773 __le32 i_ctime;
774 __le32 i_mtime;
775 __le32 i_dtime;
776 __le16 i_gid;
777 __le16 i_links_count;
778 __le32 i_blocks_lo;
779 __le32 i_flags;
780 union {
781 struct {
782 __le32 l_i_version;
783 } linux1;
784 struct {
785 __u32 h_i_translator;
786 } hurd1;
787 struct {
788 __u32 m_i_reserved1;
789 } masix1;
790 } osd1;
791 __le32 i_block[EXT4_N_BLOCKS];
792 __le32 i_generation;
793 __le32 i_file_acl_lo;
794 __le32 i_size_high;
795 __le32 i_obso_faddr;
796 union {
797 struct {
798 __le16 l_i_blocks_high;
799 __le16 l_i_file_acl_high;
800 __le16 l_i_uid_high;
801 __le16 l_i_gid_high;
802 __le16 l_i_checksum_lo;
803 __le16 l_i_reserved;
804 } linux2;
805 struct {
806 __le16 h_i_reserved1;
807 __u16 h_i_mode_high;
808 __u16 h_i_uid_high;
809 __u16 h_i_gid_high;
810 __u32 h_i_author;
811 } hurd2;
812 struct {
813 __le16 h_i_reserved1;
814 __le16 m_i_file_acl_high;
815 __u32 m_i_reserved2[2];
816 } masix2;
817 } osd2;
818 __le16 i_extra_isize;
819 __le16 i_checksum_hi;
820 __le32 i_ctime_extra;
821 __le32 i_mtime_extra;
822 __le32 i_atime_extra;
823 __le32 i_crtime;
824 __le32 i_crtime_extra;
825 __le32 i_version_hi;
826 __le32 i_projid;
827};
828
829struct move_extent {
830 __u32 reserved;
831 __u32 donor_fd;
832 __u64 orig_start;
833 __u64 donor_start;
834 __u64 len;
835 __u64 moved_len;
836};
837
838#define EXT4_EPOCH_BITS 2
839#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
840#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
841
842
843
844
845
846
847
848
849
850
851
852#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \
853 ((offsetof(typeof(*ext4_inode), field) + \
854 sizeof((ext4_inode)->field)) \
855 <= (EXT4_GOOD_OLD_INODE_SIZE + \
856 (einode)->i_extra_isize)) \
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879static inline __le32 ext4_encode_extra_time(struct timespec64 *time)
880{
881 u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK;
882 return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS));
883}
884
885static inline void ext4_decode_extra_time(struct timespec64 *time,
886 __le32 extra)
887{
888 if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK)))
889 time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32;
890 time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
891}
892
893#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
894do { \
895 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\
896 (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
897 (raw_inode)->xtime ## _extra = \
898 ext4_encode_extra_time(&(inode)->xtime); \
899 } \
900 else \
901 (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \
902} while (0)
903
904#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
905do { \
906 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
907 (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \
908 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
909 (raw_inode)->xtime ## _extra = \
910 ext4_encode_extra_time(&(einode)->xtime); \
911} while (0)
912
913#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \
914do { \
915 (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \
916 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \
917 ext4_decode_extra_time(&(inode)->xtime, \
918 raw_inode->xtime ## _extra); \
919 } \
920 else \
921 (inode)->xtime.tv_nsec = 0; \
922} while (0)
923
924
925#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \
926do { \
927 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
928 (einode)->xtime.tv_sec = \
929 (signed)le32_to_cpu((raw_inode)->xtime); \
930 else \
931 (einode)->xtime.tv_sec = 0; \
932 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
933 ext4_decode_extra_time(&(einode)->xtime, \
934 raw_inode->xtime ## _extra); \
935 else \
936 (einode)->xtime.tv_nsec = 0; \
937} while (0)
938
939#define i_disk_version osd1.linux1.l_i_version
940
941#if defined(__KERNEL__) || defined(__linux__)
942#define i_reserved1 osd1.linux1.l_i_reserved1
943#define i_file_acl_high osd2.linux2.l_i_file_acl_high
944#define i_blocks_high osd2.linux2.l_i_blocks_high
945#define i_uid_low i_uid
946#define i_gid_low i_gid
947#define i_uid_high osd2.linux2.l_i_uid_high
948#define i_gid_high osd2.linux2.l_i_gid_high
949#define i_checksum_lo osd2.linux2.l_i_checksum_lo
950
951#elif defined(__GNU__)
952
953#define i_translator osd1.hurd1.h_i_translator
954#define i_uid_high osd2.hurd2.h_i_uid_high
955#define i_gid_high osd2.hurd2.h_i_gid_high
956#define i_author osd2.hurd2.h_i_author
957
958#elif defined(__masix__)
959
960#define i_reserved1 osd1.masix1.m_i_reserved1
961#define i_file_acl_high osd2.masix2.m_i_file_acl_high
962#define i_reserved2 osd2.masix2.m_i_reserved2
963
964#endif
965
966#include "extents_status.h"
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984enum {
985 I_DATA_SEM_NORMAL = 0,
986 I_DATA_SEM_OTHER,
987 I_DATA_SEM_QUOTA,
988};
989
990
991
992
993
994struct ext4_inode_info {
995 __le32 i_data[15];
996 __u32 i_dtime;
997 ext4_fsblk_t i_file_acl;
998
999
1000
1001
1002
1003
1004
1005
1006 ext4_group_t i_block_group;
1007 ext4_lblk_t i_dir_start_lookup;
1008#if (BITS_PER_LONG < 64)
1009 unsigned long i_state_flags;
1010#endif
1011 unsigned long i_flags;
1012
1013
1014
1015
1016
1017
1018
1019
1020 struct rw_semaphore xattr_sem;
1021
1022 struct list_head i_orphan;
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039 loff_t i_disksize;
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051 struct rw_semaphore i_data_sem;
1052
1053
1054
1055
1056
1057
1058
1059
1060 struct rw_semaphore i_mmap_sem;
1061 struct inode vfs_inode;
1062 struct jbd2_inode *jinode;
1063
1064 spinlock_t i_raw_lock;
1065
1066
1067
1068
1069
1070 struct timespec64 i_crtime;
1071
1072
1073 atomic_t i_prealloc_active;
1074 struct list_head i_prealloc_list;
1075 spinlock_t i_prealloc_lock;
1076
1077
1078 struct ext4_es_tree i_es_tree;
1079 rwlock_t i_es_lock;
1080 struct list_head i_es_list;
1081 unsigned int i_es_all_nr;
1082 unsigned int i_es_shk_nr;
1083 ext4_lblk_t i_es_shrink_lblk;
1084
1085
1086
1087
1088 ext4_group_t i_last_alloc_group;
1089
1090
1091
1092 unsigned int i_reserved_data_blocks;
1093
1094
1095 struct ext4_pending_tree i_pending_tree;
1096
1097
1098 __u16 i_extra_isize;
1099
1100
1101 u16 i_inline_off;
1102 u16 i_inline_size;
1103
1104#ifdef CONFIG_QUOTA
1105
1106 qsize_t i_reserved_quota;
1107#endif
1108
1109
1110 spinlock_t i_completed_io_lock;
1111
1112
1113
1114
1115 struct list_head i_rsv_conversion_list;
1116 struct work_struct i_rsv_conversion_work;
1117 atomic_t i_unwritten;
1118
1119 spinlock_t i_block_reservation_lock;
1120
1121
1122
1123
1124
1125 tid_t i_sync_tid;
1126 tid_t i_datasync_tid;
1127
1128#ifdef CONFIG_QUOTA
1129 struct dquot *i_dquot[MAXQUOTAS];
1130#endif
1131
1132
1133 __u32 i_csum_seed;
1134
1135 kprojid_t i_projid;
1136};
1137
1138
1139
1140
1141#define EXT4_VALID_FS 0x0001
1142#define EXT4_ERROR_FS 0x0002
1143#define EXT4_ORPHAN_FS 0x0004
1144
1145
1146
1147
1148#define EXT2_FLAGS_SIGNED_HASH 0x0001
1149#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
1150#define EXT2_FLAGS_TEST_FILESYS 0x0004
1151
1152
1153
1154
1155#define EXT4_MOUNT_NO_MBCACHE 0x00001
1156#define EXT4_MOUNT_GRPID 0x00004
1157#define EXT4_MOUNT_DEBUG 0x00008
1158#define EXT4_MOUNT_ERRORS_CONT 0x00010
1159#define EXT4_MOUNT_ERRORS_RO 0x00020
1160#define EXT4_MOUNT_ERRORS_PANIC 0x00040
1161#define EXT4_MOUNT_ERRORS_MASK 0x00070
1162#define EXT4_MOUNT_MINIX_DF 0x00080
1163#define EXT4_MOUNT_NOLOAD 0x00100
1164#ifdef CONFIG_FS_DAX
1165#define EXT4_MOUNT_DAX_ALWAYS 0x00200
1166#else
1167#define EXT4_MOUNT_DAX_ALWAYS 0
1168#endif
1169#define EXT4_MOUNT_DATA_FLAGS 0x00C00
1170#define EXT4_MOUNT_JOURNAL_DATA 0x00400
1171#define EXT4_MOUNT_ORDERED_DATA 0x00800
1172#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
1173#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
1174#define EXT4_MOUNT_NO_UID32 0x02000
1175#define EXT4_MOUNT_XATTR_USER 0x04000
1176#define EXT4_MOUNT_POSIX_ACL 0x08000
1177#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
1178#define EXT4_MOUNT_BARRIER 0x20000
1179#define EXT4_MOUNT_QUOTA 0x40000
1180#define EXT4_MOUNT_USRQUOTA 0x80000
1181
1182
1183#define EXT4_MOUNT_GRPQUOTA 0x100000
1184
1185
1186#define EXT4_MOUNT_PRJQUOTA 0x200000
1187
1188#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
1189#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
1190#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
1191#define EXT4_MOUNT_WARN_ON_ERROR 0x2000000
1192#define EXT4_MOUNT_PREFETCH_BLOCK_BITMAPS 0x4000000
1193#define EXT4_MOUNT_DELALLOC 0x8000000
1194#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
1195#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
1196#define EXT4_MOUNT_DISCARD 0x40000000
1197#define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000
1198
1199
1200
1201
1202
1203
1204#define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001
1205
1206#define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002
1207
1208
1209#define EXT4_MOUNT2_HURD_COMPAT 0x00000004
1210
1211#define EXT4_MOUNT2_DAX_NEVER 0x00000008
1212#define EXT4_MOUNT2_DAX_INODE 0x00000010
1213
1214#define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008
1215
1216
1217#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \
1218 ~EXT4_MOUNT_##opt
1219#define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \
1220 EXT4_MOUNT_##opt
1221#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \
1222 EXT4_MOUNT_##opt)
1223
1224#define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \
1225 ~EXT4_MOUNT2_##opt
1226#define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \
1227 EXT4_MOUNT2_##opt
1228#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \
1229 EXT4_MOUNT2_##opt)
1230
1231#define ext4_test_and_set_bit __test_and_set_bit_le
1232#define ext4_set_bit __set_bit_le
1233#define ext4_set_bit_atomic ext2_set_bit_atomic
1234#define ext4_test_and_clear_bit __test_and_clear_bit_le
1235#define ext4_clear_bit __clear_bit_le
1236#define ext4_clear_bit_atomic ext2_clear_bit_atomic
1237#define ext4_test_bit test_bit_le
1238#define ext4_find_next_zero_bit find_next_zero_bit_le
1239#define ext4_find_next_bit find_next_bit_le
1240
1241extern void ext4_set_bits(void *bm, int cur, int len);
1242
1243
1244
1245
1246#define EXT4_DFL_MAX_MNT_COUNT 20
1247#define EXT4_DFL_CHECKINTERVAL 0
1248
1249
1250
1251
1252#define EXT4_ERRORS_CONTINUE 1
1253#define EXT4_ERRORS_RO 2
1254#define EXT4_ERRORS_PANIC 3
1255#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
1256
1257
1258#define EXT4_CRC32C_CHKSUM 1
1259
1260
1261
1262
1263struct ext4_super_block {
1264 __le32 s_inodes_count;
1265 __le32 s_blocks_count_lo;
1266 __le32 s_r_blocks_count_lo;
1267 __le32 s_free_blocks_count_lo;
1268 __le32 s_free_inodes_count;
1269 __le32 s_first_data_block;
1270 __le32 s_log_block_size;
1271 __le32 s_log_cluster_size;
1272 __le32 s_blocks_per_group;
1273 __le32 s_clusters_per_group;
1274 __le32 s_inodes_per_group;
1275 __le32 s_mtime;
1276 __le32 s_wtime;
1277 __le16 s_mnt_count;
1278 __le16 s_max_mnt_count;
1279 __le16 s_magic;
1280 __le16 s_state;
1281 __le16 s_errors;
1282 __le16 s_minor_rev_level;
1283 __le32 s_lastcheck;
1284 __le32 s_checkinterval;
1285 __le32 s_creator_os;
1286 __le32 s_rev_level;
1287 __le16 s_def_resuid;
1288 __le16 s_def_resgid;
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302 __le32 s_first_ino;
1303 __le16 s_inode_size;
1304 __le16 s_block_group_nr;
1305 __le32 s_feature_compat;
1306 __le32 s_feature_incompat;
1307 __le32 s_feature_ro_compat;
1308 __u8 s_uuid[16];
1309 char s_volume_name[16];
1310 char s_last_mounted[64] __nonstring;
1311 __le32 s_algorithm_usage_bitmap;
1312
1313
1314
1315
1316 __u8 s_prealloc_blocks;
1317 __u8 s_prealloc_dir_blocks;
1318 __le16 s_reserved_gdt_blocks;
1319
1320
1321
1322 __u8 s_journal_uuid[16];
1323 __le32 s_journal_inum;
1324 __le32 s_journal_dev;
1325 __le32 s_last_orphan;
1326 __le32 s_hash_seed[4];
1327 __u8 s_def_hash_version;
1328 __u8 s_jnl_backup_type;
1329 __le16 s_desc_size;
1330 __le32 s_default_mount_opts;
1331 __le32 s_first_meta_bg;
1332 __le32 s_mkfs_time;
1333 __le32 s_jnl_blocks[17];
1334
1335 __le32 s_blocks_count_hi;
1336 __le32 s_r_blocks_count_hi;
1337 __le32 s_free_blocks_count_hi;
1338 __le16 s_min_extra_isize;
1339 __le16 s_want_extra_isize;
1340 __le32 s_flags;
1341 __le16 s_raid_stride;
1342 __le16 s_mmp_update_interval;
1343 __le64 s_mmp_block;
1344 __le32 s_raid_stripe_width;
1345 __u8 s_log_groups_per_flex;
1346 __u8 s_checksum_type;
1347 __u8 s_encryption_level;
1348 __u8 s_reserved_pad;
1349 __le64 s_kbytes_written;
1350 __le32 s_snapshot_inum;
1351 __le32 s_snapshot_id;
1352 __le64 s_snapshot_r_blocks_count;
1353
1354 __le32 s_snapshot_list;
1355
1356#define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count)
1357 __le32 s_error_count;
1358 __le32 s_first_error_time;
1359 __le32 s_first_error_ino;
1360 __le64 s_first_error_block;
1361 __u8 s_first_error_func[32] __nonstring;
1362 __le32 s_first_error_line;
1363 __le32 s_last_error_time;
1364 __le32 s_last_error_ino;
1365 __le32 s_last_error_line;
1366 __le64 s_last_error_block;
1367 __u8 s_last_error_func[32] __nonstring;
1368#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
1369 __u8 s_mount_opts[64];
1370 __le32 s_usr_quota_inum;
1371 __le32 s_grp_quota_inum;
1372 __le32 s_overhead_clusters;
1373 __le32 s_backup_bgs[2];
1374 __u8 s_encrypt_algos[4];
1375 __u8 s_encrypt_pw_salt[16];
1376 __le32 s_lpf_ino;
1377 __le32 s_prj_quota_inum;
1378 __le32 s_checksum_seed;
1379 __u8 s_wtime_hi;
1380 __u8 s_mtime_hi;
1381 __u8 s_mkfs_time_hi;
1382 __u8 s_lastcheck_hi;
1383 __u8 s_first_error_time_hi;
1384 __u8 s_last_error_time_hi;
1385 __u8 s_first_error_errcode;
1386 __u8 s_last_error_errcode;
1387 __le16 s_encoding;
1388 __le16 s_encoding_flags;
1389 __le32 s_reserved[95];
1390 __le32 s_checksum;
1391};
1392
1393#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
1394
1395#ifdef __KERNEL__
1396
1397
1398
1399
1400#define EXT4_MF_MNTDIR_SAMPLED 0x0001
1401#define EXT4_MF_FS_ABORTED 0x0002
1402
1403#ifdef CONFIG_FS_ENCRYPTION
1404#define DUMMY_ENCRYPTION_ENABLED(sbi) ((sbi)->s_dummy_enc_ctx.ctx != NULL)
1405#else
1406#define DUMMY_ENCRYPTION_ENABLED(sbi) (0)
1407#endif
1408
1409
1410#define EXT4_MAXQUOTAS 3
1411
1412#define EXT4_ENC_UTF8_12_1 1
1413
1414
1415
1416
1417#define EXT4_ENC_STRICT_MODE_FL (1 << 0)
1418
1419#define ext4_has_strict_mode(sbi) \
1420 (sbi->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL)
1421
1422
1423
1424
1425struct ext4_sb_info {
1426 unsigned long s_desc_size;
1427 unsigned long s_inodes_per_block;
1428 unsigned long s_blocks_per_group;
1429 unsigned long s_clusters_per_group;
1430 unsigned long s_inodes_per_group;
1431 unsigned long s_itb_per_group;
1432 unsigned long s_gdb_count;
1433 unsigned long s_desc_per_block;
1434 ext4_group_t s_groups_count;
1435 ext4_group_t s_blockfile_groups;
1436 unsigned long s_overhead;
1437 unsigned int s_cluster_ratio;
1438 unsigned int s_cluster_bits;
1439 loff_t s_bitmap_maxbytes;
1440 struct buffer_head * s_sbh;
1441 struct ext4_super_block *s_es;
1442 struct buffer_head * __rcu *s_group_desc;
1443 unsigned int s_mount_opt;
1444 unsigned int s_mount_opt2;
1445 unsigned int s_mount_flags;
1446 unsigned int s_def_mount_opt;
1447 ext4_fsblk_t s_sb_block;
1448 atomic64_t s_resv_clusters;
1449 kuid_t s_resuid;
1450 kgid_t s_resgid;
1451 unsigned short s_mount_state;
1452 unsigned short s_pad;
1453 int s_addr_per_block_bits;
1454 int s_desc_per_block_bits;
1455 int s_inode_size;
1456 int s_first_ino;
1457 unsigned int s_inode_readahead_blks;
1458 unsigned int s_inode_goal;
1459 u32 s_hash_seed[4];
1460 int s_def_hash_version;
1461 int s_hash_unsigned;
1462 struct percpu_counter s_freeclusters_counter;
1463 struct percpu_counter s_freeinodes_counter;
1464 struct percpu_counter s_dirs_counter;
1465 struct percpu_counter s_dirtyclusters_counter;
1466 struct blockgroup_lock *s_blockgroup_lock;
1467 struct proc_dir_entry *s_proc;
1468 struct kobject s_kobj;
1469 struct completion s_kobj_unregister;
1470 struct super_block *s_sb;
1471#ifdef CONFIG_UNICODE
1472 struct unicode_map *s_encoding;
1473 __u16 s_encoding_flags;
1474#endif
1475
1476
1477 struct journal_s *s_journal;
1478 struct list_head s_orphan;
1479 struct mutex s_orphan_lock;
1480 unsigned long s_ext4_flags;
1481 unsigned long s_commit_interval;
1482 u32 s_max_batch_time;
1483 u32 s_min_batch_time;
1484 struct block_device *journal_bdev;
1485#ifdef CONFIG_QUOTA
1486
1487 char __rcu *s_qf_names[EXT4_MAXQUOTAS];
1488 int s_jquota_fmt;
1489#endif
1490 unsigned int s_want_extra_isize;
1491 struct ext4_system_blocks __rcu *system_blks;
1492
1493#ifdef EXTENTS_STATS
1494
1495 unsigned long s_ext_min;
1496 unsigned long s_ext_max;
1497 unsigned long s_depth_max;
1498 spinlock_t s_ext_stats_lock;
1499 unsigned long s_ext_blocks;
1500 unsigned long s_ext_extents;
1501#endif
1502
1503
1504 struct ext4_group_info ** __rcu *s_group_info;
1505 struct inode *s_buddy_cache;
1506 spinlock_t s_md_lock;
1507 unsigned short *s_mb_offsets;
1508 unsigned int *s_mb_maxs;
1509 unsigned int s_group_info_size;
1510 unsigned int s_mb_free_pending;
1511 struct list_head s_freed_data_list;
1512
1513
1514
1515 unsigned long s_stripe;
1516 unsigned int s_mb_stream_request;
1517 unsigned int s_mb_max_to_scan;
1518 unsigned int s_mb_min_to_scan;
1519 unsigned int s_mb_stats;
1520 unsigned int s_mb_order2_reqs;
1521 unsigned int s_mb_group_prealloc;
1522 unsigned int s_mb_max_inode_prealloc;
1523 unsigned int s_max_dir_size_kb;
1524
1525 unsigned long s_mb_last_group;
1526 unsigned long s_mb_last_start;
1527 unsigned int s_mb_prefetch;
1528 unsigned int s_mb_prefetch_limit;
1529
1530
1531 atomic_t s_bal_reqs;
1532 atomic_t s_bal_success;
1533 atomic_t s_bal_allocated;
1534 atomic_t s_bal_ex_scanned;
1535 atomic_t s_bal_goals;
1536 atomic_t s_bal_breaks;
1537 atomic_t s_bal_2orders;
1538 spinlock_t s_bal_lock;
1539 unsigned long s_mb_buddies_generated;
1540 unsigned long long s_mb_generation_time;
1541 atomic_t s_mb_lost_chunks;
1542 atomic_t s_mb_preallocated;
1543 atomic_t s_mb_discarded;
1544 atomic_t s_lock_busy;
1545
1546
1547 struct ext4_locality_group __percpu *s_locality_groups;
1548
1549
1550 unsigned long s_sectors_written_start;
1551 u64 s_kbytes_written;
1552
1553
1554 unsigned int s_extent_max_zeroout_kb;
1555
1556 unsigned int s_log_groups_per_flex;
1557 struct flex_groups * __rcu *s_flex_groups;
1558 ext4_group_t s_flex_groups_allocated;
1559
1560
1561 struct workqueue_struct *rsv_conversion_wq;
1562
1563
1564 struct timer_list s_err_report;
1565
1566
1567 struct ext4_li_request *s_li_request;
1568
1569 unsigned int s_li_wait_mult;
1570
1571
1572 struct task_struct *s_mmp_tsk;
1573
1574
1575 atomic_t s_last_trim_minblks;
1576
1577
1578 struct crypto_shash *s_chksum_driver;
1579
1580
1581 __u32 s_csum_seed;
1582
1583
1584 struct shrinker s_es_shrinker;
1585 struct list_head s_es_list;
1586 long s_es_nr_inode;
1587 struct ext4_es_stats s_es_stats;
1588 struct mb_cache *s_ea_block_cache;
1589 struct mb_cache *s_ea_inode_cache;
1590 spinlock_t s_es_lock ____cacheline_aligned_in_smp;
1591
1592
1593 struct ratelimit_state s_err_ratelimit_state;
1594 struct ratelimit_state s_warning_ratelimit_state;
1595 struct ratelimit_state s_msg_ratelimit_state;
1596 atomic_t s_warning_count;
1597 atomic_t s_msg_count;
1598
1599
1600 struct fscrypt_dummy_context s_dummy_enc_ctx;
1601
1602
1603
1604
1605
1606 struct percpu_rw_semaphore s_writepages_rwsem;
1607 struct dax_device *s_daxdev;
1608#ifdef CONFIG_EXT4_DEBUG
1609 unsigned long s_simulate_fail;
1610#endif
1611
1612 errseq_t s_bdev_wb_err;
1613 spinlock_t s_bdev_wb_lock;
1614};
1615
1616static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1617{
1618 return sb->s_fs_info;
1619}
1620static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1621{
1622 return container_of(inode, struct ext4_inode_info, vfs_inode);
1623}
1624
1625static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
1626{
1627 return ino == EXT4_ROOT_INO ||
1628 (ino >= EXT4_FIRST_INO(sb) &&
1629 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
1630}
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640#define sbi_array_rcu_deref(sbi, field, index) \
1641({ \
1642 typeof(*((sbi)->field)) _v; \
1643 rcu_read_lock(); \
1644 _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \
1645 rcu_read_unlock(); \
1646 _v; \
1647})
1648
1649
1650
1651
1652#define EXT4_SIM_BBITMAP_EIO 1
1653#define EXT4_SIM_BBITMAP_CRC 2
1654#define EXT4_SIM_IBITMAP_EIO 3
1655#define EXT4_SIM_IBITMAP_CRC 4
1656#define EXT4_SIM_INODE_EIO 5
1657#define EXT4_SIM_INODE_CRC 6
1658#define EXT4_SIM_DIRBLOCK_EIO 7
1659#define EXT4_SIM_DIRBLOCK_CRC 8
1660
1661static inline bool ext4_simulate_fail(struct super_block *sb,
1662 unsigned long code)
1663{
1664#ifdef CONFIG_EXT4_DEBUG
1665 struct ext4_sb_info *sbi = EXT4_SB(sb);
1666
1667 if (unlikely(sbi->s_simulate_fail == code)) {
1668 sbi->s_simulate_fail = 0;
1669 return true;
1670 }
1671#endif
1672 return false;
1673}
1674
1675static inline void ext4_simulate_fail_bh(struct super_block *sb,
1676 struct buffer_head *bh,
1677 unsigned long code)
1678{
1679 if (!IS_ERR(bh) && ext4_simulate_fail(sb, code))
1680 clear_buffer_uptodate(bh);
1681}
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691#define EXT4_ERR_UNKNOWN 1
1692#define EXT4_ERR_EIO 2
1693#define EXT4_ERR_ENOMEM 3
1694#define EXT4_ERR_EFSBADCRC 4
1695#define EXT4_ERR_EFSCORRUPTED 5
1696#define EXT4_ERR_ENOSPC 6
1697#define EXT4_ERR_ENOKEY 7
1698#define EXT4_ERR_EROFS 8
1699#define EXT4_ERR_EFBIG 9
1700#define EXT4_ERR_EEXIST 10
1701#define EXT4_ERR_ERANGE 11
1702#define EXT4_ERR_EOVERFLOW 12
1703#define EXT4_ERR_EBUSY 13
1704#define EXT4_ERR_ENOTDIR 14
1705#define EXT4_ERR_ENOTEMPTY 15
1706#define EXT4_ERR_ESHUTDOWN 16
1707#define EXT4_ERR_EFAULT 17
1708
1709
1710
1711
1712enum {
1713 EXT4_STATE_JDATA,
1714 EXT4_STATE_NEW,
1715 EXT4_STATE_XATTR,
1716 EXT4_STATE_NO_EXPAND,
1717 EXT4_STATE_DA_ALLOC_CLOSE,
1718 EXT4_STATE_EXT_MIGRATE,
1719 EXT4_STATE_NEWENTRY,
1720 EXT4_STATE_MAY_INLINE_DATA,
1721 EXT4_STATE_EXT_PRECACHED,
1722 EXT4_STATE_LUSTRE_EA_INODE,
1723 EXT4_STATE_VERITY_IN_PROGRESS,
1724};
1725
1726#define EXT4_INODE_BIT_FNS(name, field, offset) \
1727static inline int ext4_test_inode_##name(struct inode *inode, int bit) \
1728{ \
1729 return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1730} \
1731static inline void ext4_set_inode_##name(struct inode *inode, int bit) \
1732{ \
1733 set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1734} \
1735static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
1736{ \
1737 clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1738}
1739
1740
1741
1742static inline int ext4_test_inode_flag(struct inode *inode, int bit);
1743static inline void ext4_set_inode_flag(struct inode *inode, int bit);
1744static inline void ext4_clear_inode_flag(struct inode *inode, int bit);
1745EXT4_INODE_BIT_FNS(flag, flags, 0)
1746
1747
1748
1749static inline int ext4_test_inode_state(struct inode *inode, int bit);
1750static inline void ext4_set_inode_state(struct inode *inode, int bit);
1751static inline void ext4_clear_inode_state(struct inode *inode, int bit);
1752#if (BITS_PER_LONG < 64)
1753EXT4_INODE_BIT_FNS(state, state_flags, 0)
1754
1755static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1756{
1757 (ei)->i_state_flags = 0;
1758}
1759#else
1760EXT4_INODE_BIT_FNS(state, flags, 32)
1761
1762static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1763{
1764
1765}
1766#endif
1767#else
1768
1769
1770
1771#define EXT4_SB(sb) (sb)
1772#endif
1773
1774static inline bool ext4_verity_in_progress(struct inode *inode)
1775{
1776 return IS_ENABLED(CONFIG_FS_VERITY) &&
1777 ext4_test_inode_state(inode, EXT4_STATE_VERITY_IN_PROGRESS);
1778}
1779
1780#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
1781
1782
1783
1784
1785#define EXT4_OS_LINUX 0
1786#define EXT4_OS_HURD 1
1787#define EXT4_OS_MASIX 2
1788#define EXT4_OS_FREEBSD 3
1789#define EXT4_OS_LITES 4
1790
1791
1792
1793
1794#define EXT4_GOOD_OLD_REV 0
1795#define EXT4_DYNAMIC_REV 1
1796
1797#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
1798#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
1799
1800#define EXT4_GOOD_OLD_INODE_SIZE 128
1801
1802#define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN)
1803#define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX
1804#define EXT4_TIMESTAMP_MIN S32_MIN
1805
1806
1807
1808
1809
1810#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
1811#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
1812#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
1813#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
1814#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
1815#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
1816#define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200
1817#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800
1818
1819#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1820#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
1821#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
1822#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
1823#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1824#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
1825#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
1826#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
1827#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
1828
1829
1830
1831
1832
1833
1834#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
1835#define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000
1836#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000
1837#define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000
1838
1839#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
1840#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
1841#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
1842#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
1843#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
1844#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
1845#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
1846#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
1847#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
1848#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
1849#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
1850#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000
1851#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000
1852#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000
1853#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
1854#define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000
1855
1856extern void ext4_update_dynamic_rev(struct super_block *sb);
1857
1858#define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \
1859static inline bool ext4_has_feature_##name(struct super_block *sb) \
1860{ \
1861 return ((EXT4_SB(sb)->s_es->s_feature_compat & \
1862 cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \
1863} \
1864static inline void ext4_set_feature_##name(struct super_block *sb) \
1865{ \
1866 ext4_update_dynamic_rev(sb); \
1867 EXT4_SB(sb)->s_es->s_feature_compat |= \
1868 cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
1869} \
1870static inline void ext4_clear_feature_##name(struct super_block *sb) \
1871{ \
1872 EXT4_SB(sb)->s_es->s_feature_compat &= \
1873 ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
1874}
1875
1876#define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
1877static inline bool ext4_has_feature_##name(struct super_block *sb) \
1878{ \
1879 return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
1880 cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \
1881} \
1882static inline void ext4_set_feature_##name(struct super_block *sb) \
1883{ \
1884 ext4_update_dynamic_rev(sb); \
1885 EXT4_SB(sb)->s_es->s_feature_ro_compat |= \
1886 cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
1887} \
1888static inline void ext4_clear_feature_##name(struct super_block *sb) \
1889{ \
1890 EXT4_SB(sb)->s_es->s_feature_ro_compat &= \
1891 ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
1892}
1893
1894#define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \
1895static inline bool ext4_has_feature_##name(struct super_block *sb) \
1896{ \
1897 return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
1898 cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \
1899} \
1900static inline void ext4_set_feature_##name(struct super_block *sb) \
1901{ \
1902 ext4_update_dynamic_rev(sb); \
1903 EXT4_SB(sb)->s_es->s_feature_incompat |= \
1904 cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
1905} \
1906static inline void ext4_clear_feature_##name(struct super_block *sb) \
1907{ \
1908 EXT4_SB(sb)->s_es->s_feature_incompat &= \
1909 ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
1910}
1911
1912EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC)
1913EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES)
1914EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL)
1915EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR)
1916EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE)
1917EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX)
1918EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2)
1919EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, STABLE_INODES)
1920
1921EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER)
1922EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE)
1923EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR)
1924EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE)
1925EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM)
1926EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK)
1927EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE)
1928EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA)
1929EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC)
1930EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM)
1931EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY)
1932EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT)
1933EXT4_FEATURE_RO_COMPAT_FUNCS(verity, VERITY)
1934
1935EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION)
1936EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE)
1937EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER)
1938EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV)
1939EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG)
1940EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS)
1941EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT)
1942EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP)
1943EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG)
1944EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE)
1945EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA)
1946EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED)
1947EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR)
1948EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA)
1949EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
1950EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD)
1951
1952#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1953#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1954 EXT4_FEATURE_INCOMPAT_META_BG)
1955#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1956 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1957 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1958
1959#define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1960#define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1961 EXT4_FEATURE_INCOMPAT_RECOVER| \
1962 EXT4_FEATURE_INCOMPAT_META_BG)
1963#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1964 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1965 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1966
1967#define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1968#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1969 EXT4_FEATURE_INCOMPAT_RECOVER| \
1970 EXT4_FEATURE_INCOMPAT_META_BG| \
1971 EXT4_FEATURE_INCOMPAT_EXTENTS| \
1972 EXT4_FEATURE_INCOMPAT_64BIT| \
1973 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
1974 EXT4_FEATURE_INCOMPAT_EA_INODE| \
1975 EXT4_FEATURE_INCOMPAT_MMP | \
1976 EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
1977 EXT4_FEATURE_INCOMPAT_ENCRYPT | \
1978 EXT4_FEATURE_INCOMPAT_CASEFOLD | \
1979 EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
1980 EXT4_FEATURE_INCOMPAT_LARGEDIR)
1981#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1982 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1983 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
1984 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
1985 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
1986 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
1987 EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
1988 EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
1989 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
1990 EXT4_FEATURE_RO_COMPAT_QUOTA |\
1991 EXT4_FEATURE_RO_COMPAT_PROJECT |\
1992 EXT4_FEATURE_RO_COMPAT_VERITY)
1993
1994#define EXTN_FEATURE_FUNCS(ver) \
1995static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \
1996{ \
1997 return ((EXT4_SB(sb)->s_es->s_feature_compat & \
1998 cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \
1999} \
2000static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \
2001{ \
2002 return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
2003 cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \
2004} \
2005static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \
2006{ \
2007 return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
2008 cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \
2009}
2010
2011EXTN_FEATURE_FUNCS(2)
2012EXTN_FEATURE_FUNCS(3)
2013EXTN_FEATURE_FUNCS(4)
2014
2015static inline bool ext4_has_compat_features(struct super_block *sb)
2016{
2017 return (EXT4_SB(sb)->s_es->s_feature_compat != 0);
2018}
2019static inline bool ext4_has_ro_compat_features(struct super_block *sb)
2020{
2021 return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0);
2022}
2023static inline bool ext4_has_incompat_features(struct super_block *sb)
2024{
2025 return (EXT4_SB(sb)->s_es->s_feature_incompat != 0);
2026}
2027
2028
2029
2030
2031#define EXT4_FLAGS_RESIZING 0
2032#define EXT4_FLAGS_SHUTDOWN 1
2033#define EXT4_FLAGS_BDEV_IS_DAX 2
2034
2035static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi)
2036{
2037 return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
2038}
2039
2040
2041
2042
2043
2044#define EXT4_DEF_RESUID 0
2045#define EXT4_DEF_RESGID 0
2046
2047
2048
2049
2050#define EXT4_DEF_PROJID 0
2051
2052#define EXT4_DEF_INODE_READAHEAD_BLKS 32
2053
2054
2055
2056
2057#define EXT4_DEFM_DEBUG 0x0001
2058#define EXT4_DEFM_BSDGROUPS 0x0002
2059#define EXT4_DEFM_XATTR_USER 0x0004
2060#define EXT4_DEFM_ACL 0x0008
2061#define EXT4_DEFM_UID16 0x0010
2062#define EXT4_DEFM_JMODE 0x0060
2063#define EXT4_DEFM_JMODE_DATA 0x0020
2064#define EXT4_DEFM_JMODE_ORDERED 0x0040
2065#define EXT4_DEFM_JMODE_WBACK 0x0060
2066#define EXT4_DEFM_NOBARRIER 0x0100
2067#define EXT4_DEFM_BLOCK_VALIDITY 0x0200
2068#define EXT4_DEFM_DISCARD 0x0400
2069#define EXT4_DEFM_NODELALLOC 0x0800
2070
2071
2072
2073
2074#define EXT4_DEF_MIN_BATCH_TIME 0
2075#define EXT4_DEF_MAX_BATCH_TIME 15000
2076
2077
2078
2079
2080
2081#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
2082
2083
2084
2085
2086#define EXT4_NAME_LEN 255
2087
2088struct ext4_dir_entry {
2089 __le32 inode;
2090 __le16 rec_len;
2091 __le16 name_len;
2092 char name[EXT4_NAME_LEN];
2093};
2094
2095
2096
2097
2098
2099
2100
2101struct ext4_dir_entry_2 {
2102 __le32 inode;
2103 __le16 rec_len;
2104 __u8 name_len;
2105 __u8 file_type;
2106 char name[EXT4_NAME_LEN];
2107};
2108
2109
2110
2111
2112
2113struct ext4_dir_entry_tail {
2114 __le32 det_reserved_zero1;
2115 __le16 det_rec_len;
2116 __u8 det_reserved_zero2;
2117 __u8 det_reserved_ft;
2118 __le32 det_checksum;
2119};
2120
2121#define EXT4_DIRENT_TAIL(block, blocksize) \
2122 ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
2123 ((blocksize) - \
2124 sizeof(struct ext4_dir_entry_tail))))
2125
2126
2127
2128
2129
2130#define EXT4_FT_UNKNOWN 0
2131#define EXT4_FT_REG_FILE 1
2132#define EXT4_FT_DIR 2
2133#define EXT4_FT_CHRDEV 3
2134#define EXT4_FT_BLKDEV 4
2135#define EXT4_FT_FIFO 5
2136#define EXT4_FT_SOCK 6
2137#define EXT4_FT_SYMLINK 7
2138
2139#define EXT4_FT_MAX 8
2140
2141#define EXT4_FT_DIR_CSUM 0xDE
2142
2143
2144
2145
2146
2147
2148#define EXT4_DIR_PAD 4
2149#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
2150#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
2151 ~EXT4_DIR_ROUND)
2152#define EXT4_MAX_REC_LEN ((1<<16)-1)
2153
2154
2155
2156
2157
2158static inline unsigned int
2159ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
2160{
2161 unsigned len = le16_to_cpu(dlen);
2162
2163#if (PAGE_SIZE >= 65536)
2164 if (len == EXT4_MAX_REC_LEN || len == 0)
2165 return blocksize;
2166 return (len & 65532) | ((len & 3) << 16);
2167#else
2168 return len;
2169#endif
2170}
2171
2172static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
2173{
2174 if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
2175 BUG();
2176#if (PAGE_SIZE >= 65536)
2177 if (len < 65536)
2178 return cpu_to_le16(len);
2179 if (len == blocksize) {
2180 if (blocksize == 65536)
2181 return cpu_to_le16(EXT4_MAX_REC_LEN);
2182 else
2183 return cpu_to_le16(0);
2184 }
2185 return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
2186#else
2187 return cpu_to_le16(len);
2188#endif
2189}
2190
2191
2192
2193
2194
2195
2196#define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \
2197 ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
2198#define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \
2199 !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir)))
2200#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
2201
2202
2203
2204#define DX_HASH_LEGACY 0
2205#define DX_HASH_HALF_MD4 1
2206#define DX_HASH_TEA 2
2207#define DX_HASH_LEGACY_UNSIGNED 3
2208#define DX_HASH_HALF_MD4_UNSIGNED 4
2209#define DX_HASH_TEA_UNSIGNED 5
2210
2211static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc,
2212 const void *address, unsigned int length)
2213{
2214 struct {
2215 struct shash_desc shash;
2216 char ctx[4];
2217 } desc;
2218
2219 BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx));
2220
2221 desc.shash.tfm = sbi->s_chksum_driver;
2222 *(u32 *)desc.ctx = crc;
2223
2224 BUG_ON(crypto_shash_update(&desc.shash, address, length));
2225
2226 return *(u32 *)desc.ctx;
2227}
2228
2229#ifdef __KERNEL__
2230
2231
2232struct dx_hash_info
2233{
2234 u32 hash;
2235 u32 minor_hash;
2236 int hash_version;
2237 u32 *seed;
2238};
2239
2240
2241
2242#define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1)
2243#define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1)
2244
2245
2246
2247
2248
2249#define HASH_NB_ALWAYS 1
2250
2251struct ext4_filename {
2252 const struct qstr *usr_fname;
2253 struct fscrypt_str disk_name;
2254 struct dx_hash_info hinfo;
2255#ifdef CONFIG_FS_ENCRYPTION
2256 struct fscrypt_str crypto_buf;
2257#endif
2258#ifdef CONFIG_UNICODE
2259 struct fscrypt_str cf_name;
2260#endif
2261};
2262
2263#define fname_name(p) ((p)->disk_name.name)
2264#define fname_len(p) ((p)->disk_name.len)
2265
2266
2267
2268
2269struct ext4_iloc
2270{
2271 struct buffer_head *bh;
2272 unsigned long offset;
2273 ext4_group_t block_group;
2274};
2275
2276static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
2277{
2278 return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
2279}
2280
2281static inline bool ext4_is_quota_file(struct inode *inode)
2282{
2283 return IS_NOQUOTA(inode) &&
2284 !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL);
2285}
2286
2287
2288
2289
2290
2291
2292struct dir_private_info {
2293 struct rb_root root;
2294 struct rb_node *curr_node;
2295 struct fname *extra_fname;
2296 loff_t last_pos;
2297 __u32 curr_hash;
2298 __u32 curr_minor_hash;
2299 __u32 next_hash;
2300};
2301
2302
2303static inline ext4_fsblk_t
2304ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
2305{
2306 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
2307 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
2308}
2309
2310
2311
2312
2313#define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1))
2314
2315
2316#define EXT4_HTREE_LEVEL_COMPAT 2
2317#define EXT4_HTREE_LEVEL 3
2318
2319static inline int ext4_dir_htree_level(struct super_block *sb)
2320{
2321 return ext4_has_feature_largedir(sb) ?
2322 EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT;
2323}
2324
2325
2326
2327
2328#define EXT4_DEF_LI_WAIT_MULT 10
2329#define EXT4_DEF_LI_MAX_START_DELAY 5
2330#define EXT4_LAZYINIT_QUIT 0x0001
2331#define EXT4_LAZYINIT_RUNNING 0x0002
2332
2333
2334
2335
2336struct ext4_lazy_init {
2337 unsigned long li_state;
2338 struct list_head li_request_list;
2339 struct mutex li_list_mtx;
2340};
2341
2342enum ext4_li_mode {
2343 EXT4_LI_MODE_PREFETCH_BBITMAP,
2344 EXT4_LI_MODE_ITABLE,
2345};
2346
2347struct ext4_li_request {
2348 struct super_block *lr_super;
2349 enum ext4_li_mode lr_mode;
2350 ext4_group_t lr_first_not_zeroed;
2351 ext4_group_t lr_next_group;
2352 struct list_head lr_request;
2353 unsigned long lr_next_sched;
2354 unsigned long lr_timeout;
2355};
2356
2357struct ext4_features {
2358 struct kobject f_kobj;
2359 struct completion f_kobj_unregister;
2360};
2361
2362
2363
2364
2365
2366
2367
2368
2369#define EXT4_MMP_MAGIC 0x004D4D50U
2370#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U
2371#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U
2372#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU
2373
2374struct mmp_struct {
2375 __le32 mmp_magic;
2376 __le32 mmp_seq;
2377
2378
2379
2380
2381
2382 __le64 mmp_time;
2383 char mmp_nodename[64];
2384 char mmp_bdevname[32];
2385
2386
2387
2388
2389
2390
2391 __le16 mmp_check_interval;
2392
2393 __le16 mmp_pad1;
2394 __le32 mmp_pad2[226];
2395 __le32 mmp_checksum;
2396};
2397
2398
2399struct mmpd_data {
2400 struct buffer_head *bh;
2401 struct super_block *sb;
2402};
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412#define EXT4_MMP_CHECK_MULT 2UL
2413
2414
2415
2416
2417#define EXT4_MMP_MIN_CHECK_INTERVAL 5UL
2418
2419
2420
2421
2422#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432# define NORET_TYPE
2433# define ATTRIB_NORET __attribute__((noreturn))
2434# define NORET_AND noreturn,
2435
2436
2437extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
2438void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
2439 struct ext4_group_desc *gdp,
2440 struct buffer_head *bh, int sz);
2441int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
2442 struct ext4_group_desc *gdp,
2443 struct buffer_head *bh, int sz);
2444void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
2445 struct ext4_group_desc *gdp,
2446 struct buffer_head *bh);
2447int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
2448 struct ext4_group_desc *gdp,
2449 struct buffer_head *bh);
2450
2451
2452extern void ext4_get_group_no_and_offset(struct super_block *sb,
2453 ext4_fsblk_t blocknr,
2454 ext4_group_t *blockgrpp,
2455 ext4_grpblk_t *offsetp);
2456extern ext4_group_t ext4_get_group_number(struct super_block *sb,
2457 ext4_fsblk_t block);
2458
2459extern unsigned int ext4_block_group(struct super_block *sb,
2460 ext4_fsblk_t blocknr);
2461extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
2462 ext4_fsblk_t blocknr);
2463extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
2464extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
2465 ext4_group_t group);
2466extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
2467 ext4_fsblk_t goal,
2468 unsigned int flags,
2469 unsigned long *count,
2470 int *errp);
2471extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
2472 s64 nclusters, unsigned int flags);
2473extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *);
2474extern void ext4_check_blocks_bitmap(struct super_block *);
2475extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
2476 ext4_group_t block_group,
2477 struct buffer_head ** bh);
2478extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
2479
2480extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb,
2481 ext4_group_t block_group,
2482 bool ignore_locked);
2483extern int ext4_wait_block_bitmap(struct super_block *sb,
2484 ext4_group_t block_group,
2485 struct buffer_head *bh);
2486extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
2487 ext4_group_t block_group);
2488extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
2489 ext4_group_t block_group,
2490 struct ext4_group_desc *gdp);
2491ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
2492
2493#ifdef CONFIG_UNICODE
2494extern void ext4_fname_setup_ci_filename(struct inode *dir,
2495 const struct qstr *iname,
2496 struct fscrypt_str *fname);
2497#endif
2498
2499#ifdef CONFIG_FS_ENCRYPTION
2500static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst,
2501 const struct fscrypt_name *src)
2502{
2503 memset(dst, 0, sizeof(*dst));
2504
2505 dst->usr_fname = src->usr_fname;
2506 dst->disk_name = src->disk_name;
2507 dst->hinfo.hash = src->hash;
2508 dst->hinfo.minor_hash = src->minor_hash;
2509 dst->crypto_buf = src->crypto_buf;
2510}
2511
2512static inline int ext4_fname_setup_filename(struct inode *dir,
2513 const struct qstr *iname,
2514 int lookup,
2515 struct ext4_filename *fname)
2516{
2517 struct fscrypt_name name;
2518 int err;
2519
2520 err = fscrypt_setup_filename(dir, iname, lookup, &name);
2521 if (err)
2522 return err;
2523
2524 ext4_fname_from_fscrypt_name(fname, &name);
2525
2526#ifdef CONFIG_UNICODE
2527 ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
2528#endif
2529 return 0;
2530}
2531
2532static inline int ext4_fname_prepare_lookup(struct inode *dir,
2533 struct dentry *dentry,
2534 struct ext4_filename *fname)
2535{
2536 struct fscrypt_name name;
2537 int err;
2538
2539 err = fscrypt_prepare_lookup(dir, dentry, &name);
2540 if (err)
2541 return err;
2542
2543 ext4_fname_from_fscrypt_name(fname, &name);
2544
2545#ifdef CONFIG_UNICODE
2546 ext4_fname_setup_ci_filename(dir, &dentry->d_name, &fname->cf_name);
2547#endif
2548 return 0;
2549}
2550
2551static inline void ext4_fname_free_filename(struct ext4_filename *fname)
2552{
2553 struct fscrypt_name name;
2554
2555 name.crypto_buf = fname->crypto_buf;
2556 fscrypt_free_filename(&name);
2557
2558 fname->crypto_buf.name = NULL;
2559 fname->usr_fname = NULL;
2560 fname->disk_name.name = NULL;
2561
2562#ifdef CONFIG_UNICODE
2563 kfree(fname->cf_name.name);
2564 fname->cf_name.name = NULL;
2565#endif
2566}
2567#else
2568static inline int ext4_fname_setup_filename(struct inode *dir,
2569 const struct qstr *iname,
2570 int lookup,
2571 struct ext4_filename *fname)
2572{
2573 fname->usr_fname = iname;
2574 fname->disk_name.name = (unsigned char *) iname->name;
2575 fname->disk_name.len = iname->len;
2576
2577#ifdef CONFIG_UNICODE
2578 ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
2579#endif
2580
2581 return 0;
2582}
2583
2584static inline int ext4_fname_prepare_lookup(struct inode *dir,
2585 struct dentry *dentry,
2586 struct ext4_filename *fname)
2587{
2588 return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname);
2589}
2590
2591static inline void ext4_fname_free_filename(struct ext4_filename *fname)
2592{
2593#ifdef CONFIG_UNICODE
2594 kfree(fname->cf_name.name);
2595 fname->cf_name.name = NULL;
2596#endif
2597}
2598#endif
2599
2600
2601extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
2602 struct file *,
2603 struct ext4_dir_entry_2 *,
2604 struct buffer_head *, char *, int,
2605 unsigned int);
2606#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \
2607 unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
2608 (de), (bh), (buf), (size), (offset)))
2609extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
2610 __u32 minor_hash,
2611 struct ext4_dir_entry_2 *dirent,
2612 struct fscrypt_str *ent_name);
2613extern void ext4_htree_free_dir_info(struct dir_private_info *p);
2614extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
2615 struct buffer_head *bh,
2616 void *buf, int buf_size,
2617 struct ext4_filename *fname,
2618 struct ext4_dir_entry_2 **dest_de);
2619void ext4_insert_dentry(struct inode *inode,
2620 struct ext4_dir_entry_2 *de,
2621 int buf_size,
2622 struct ext4_filename *fname);
2623static inline void ext4_update_dx_flag(struct inode *inode)
2624{
2625 if (!ext4_has_feature_dir_index(inode->i_sb)) {
2626
2627 WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb));
2628 ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
2629 }
2630}
2631static const unsigned char ext4_filetype_table[] = {
2632 DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
2633};
2634
2635static inline unsigned char get_dtype(struct super_block *sb, int filetype)
2636{
2637 if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX)
2638 return DT_UNKNOWN;
2639
2640 return ext4_filetype_table[filetype];
2641}
2642extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
2643 void *buf, int buf_size);
2644
2645
2646extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
2647
2648
2649extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
2650 struct dx_hash_info *hinfo);
2651
2652
2653extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
2654 const struct qstr *qstr, __u32 goal,
2655 uid_t *owner, __u32 i_flags,
2656 int handle_type, unsigned int line_no,
2657 int nblocks);
2658
2659#define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \
2660 __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \
2661 i_flags, 0, 0, 0)
2662#define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \
2663 type, nblocks) \
2664 __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \
2665 0, (type), __LINE__, (nblocks))
2666
2667
2668extern void ext4_free_inode(handle_t *, struct inode *);
2669extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
2670extern unsigned long ext4_count_free_inodes(struct super_block *);
2671extern unsigned long ext4_count_dirs(struct super_block *);
2672extern void ext4_check_inodes_bitmap(struct super_block *);
2673extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
2674extern int ext4_init_inode_table(struct super_block *sb,
2675 ext4_group_t group, int barrier);
2676extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
2677
2678
2679extern const struct seq_operations ext4_mb_seq_groups_ops;
2680extern long ext4_mb_stats;
2681extern long ext4_mb_max_to_scan;
2682extern int ext4_mb_init(struct super_block *);
2683extern int ext4_mb_release(struct super_block *);
2684extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
2685 struct ext4_allocation_request *, int *);
2686extern int ext4_mb_reserve_blocks(struct super_block *, int);
2687extern void ext4_discard_preallocations(struct inode *, unsigned int);
2688extern int __init ext4_init_mballoc(void);
2689extern void ext4_exit_mballoc(void);
2690extern ext4_group_t ext4_mb_prefetch(struct super_block *sb,
2691 ext4_group_t group,
2692 unsigned int nr, int *cnt);
2693extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
2694 unsigned int nr);
2695
2696extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
2697 struct buffer_head *bh, ext4_fsblk_t block,
2698 unsigned long count, int flags);
2699extern int ext4_mb_alloc_groupinfo(struct super_block *sb,
2700 ext4_group_t ngroups);
2701extern int ext4_mb_add_groupinfo(struct super_block *sb,
2702 ext4_group_t i, struct ext4_group_desc *desc);
2703extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
2704 ext4_fsblk_t block, unsigned long count);
2705extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
2706extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid);
2707
2708
2709int ext4_inode_is_fast_symlink(struct inode *inode);
2710struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int);
2711struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int);
2712int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count,
2713 bool wait, struct buffer_head **bhs);
2714int ext4_get_block_unwritten(struct inode *inode, sector_t iblock,
2715 struct buffer_head *bh_result, int create);
2716int ext4_get_block(struct inode *inode, sector_t iblock,
2717 struct buffer_head *bh_result, int create);
2718int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
2719 struct buffer_head *bh, int create);
2720int ext4_walk_page_buffers(handle_t *handle,
2721 struct buffer_head *head,
2722 unsigned from,
2723 unsigned to,
2724 int *partial,
2725 int (*fn)(handle_t *handle,
2726 struct buffer_head *bh));
2727int do_journal_get_write_access(handle_t *handle,
2728 struct buffer_head *bh);
2729#define FALL_BACK_TO_NONDELALLOC 1
2730#define CONVERT_INLINE_DATA 2
2731
2732typedef enum {
2733 EXT4_IGET_NORMAL = 0,
2734 EXT4_IGET_SPECIAL = 0x0001,
2735 EXT4_IGET_HANDLE = 0x0002
2736} ext4_iget_flags;
2737
2738extern struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
2739 ext4_iget_flags flags, const char *function,
2740 unsigned int line);
2741
2742#define ext4_iget(sb, ino, flags) \
2743 __ext4_iget((sb), (ino), (flags), __func__, __LINE__)
2744
2745extern int ext4_write_inode(struct inode *, struct writeback_control *);
2746extern int ext4_setattr(struct dentry *, struct iattr *);
2747extern int ext4_getattr(const struct path *, struct kstat *, u32, unsigned int);
2748extern void ext4_evict_inode(struct inode *);
2749extern void ext4_clear_inode(struct inode *);
2750extern int ext4_file_getattr(const struct path *, struct kstat *, u32, unsigned int);
2751extern int ext4_sync_inode(handle_t *, struct inode *);
2752extern void ext4_dirty_inode(struct inode *, int);
2753extern int ext4_change_inode_journal_flag(struct inode *, int);
2754extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
2755extern int ext4_inode_attach_jinode(struct inode *inode);
2756extern int ext4_can_truncate(struct inode *inode);
2757extern int ext4_truncate(struct inode *);
2758extern int ext4_break_layouts(struct inode *);
2759extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length);
2760extern void ext4_set_inode_flags(struct inode *, bool init);
2761extern int ext4_alloc_da_blocks(struct inode *inode);
2762extern void ext4_set_aops(struct inode *inode);
2763extern int ext4_writepage_trans_blocks(struct inode *);
2764extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
2765extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
2766 loff_t lstart, loff_t lend);
2767extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf);
2768extern vm_fault_t ext4_filemap_fault(struct vm_fault *vmf);
2769extern qsize_t *ext4_get_reserved_space(struct inode *inode);
2770extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
2771extern void ext4_da_release_space(struct inode *inode, int to_free);
2772extern void ext4_da_update_reserve_space(struct inode *inode,
2773 int used, int quota_claim);
2774extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk,
2775 ext4_fsblk_t pblk, ext4_lblk_t len);
2776
2777
2778extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
2779 struct ext4_map_blocks *map, int flags);
2780extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
2781extern void ext4_ind_truncate(handle_t *, struct inode *inode);
2782extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
2783 ext4_lblk_t start, ext4_lblk_t end);
2784
2785
2786extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
2787extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
2788
2789
2790extern int ext4_ext_migrate(struct inode *);
2791extern int ext4_ind_migrate(struct inode *inode);
2792
2793
2794extern int ext4_dirblock_csum_verify(struct inode *inode,
2795 struct buffer_head *bh);
2796extern int ext4_orphan_add(handle_t *, struct inode *);
2797extern int ext4_orphan_del(handle_t *, struct inode *);
2798extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
2799 __u32 start_minor_hash, __u32 *next_hash);
2800extern int ext4_search_dir(struct buffer_head *bh,
2801 char *search_buf,
2802 int buf_size,
2803 struct inode *dir,
2804 struct ext4_filename *fname,
2805 unsigned int offset,
2806 struct ext4_dir_entry_2 **res_dir);
2807extern int ext4_generic_delete_entry(struct inode *dir,
2808 struct ext4_dir_entry_2 *de_del,
2809 struct buffer_head *bh,
2810 void *entry_buf,
2811 int buf_size,
2812 int csum_size);
2813extern bool ext4_empty_dir(struct inode *inode);
2814
2815
2816extern void ext4_kvfree_array_rcu(void *to_free);
2817extern int ext4_group_add(struct super_block *sb,
2818 struct ext4_new_group_data *input);
2819extern int ext4_group_extend(struct super_block *sb,
2820 struct ext4_super_block *es,
2821 ext4_fsblk_t n_blocks_count);
2822extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
2823
2824
2825extern struct buffer_head *ext4_sb_bread(struct super_block *sb,
2826 sector_t block, int op_flags);
2827extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
2828extern int ext4_calculate_overhead(struct super_block *sb);
2829extern void ext4_superblock_csum_set(struct super_block *sb);
2830extern int ext4_alloc_flex_bg_array(struct super_block *sb,
2831 ext4_group_t ngroup);
2832extern const char *ext4_decode_error(struct super_block *sb, int errno,
2833 char nbuf[16]);
2834extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
2835 ext4_group_t block_group,
2836 unsigned int flags);
2837
2838extern __printf(6, 7)
2839void __ext4_error(struct super_block *, const char *, unsigned int, int, __u64,
2840 const char *, ...);
2841extern __printf(6, 7)
2842void __ext4_error_inode(struct inode *, const char *, unsigned int,
2843 ext4_fsblk_t, int, const char *, ...);
2844extern __printf(5, 6)
2845void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t,
2846 const char *, ...);
2847extern void __ext4_std_error(struct super_block *, const char *,
2848 unsigned int, int);
2849extern __printf(5, 6)
2850void __ext4_abort(struct super_block *, const char *, unsigned int, int,
2851 const char *, ...);
2852extern __printf(4, 5)
2853void __ext4_warning(struct super_block *, const char *, unsigned int,
2854 const char *, ...);
2855extern __printf(4, 5)
2856void __ext4_warning_inode(const struct inode *inode, const char *function,
2857 unsigned int line, const char *fmt, ...);
2858extern __printf(3, 4)
2859void __ext4_msg(struct super_block *, const char *, const char *, ...);
2860extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
2861 const char *, unsigned int, const char *);
2862extern __printf(7, 8)
2863void __ext4_grp_locked_error(const char *, unsigned int,
2864 struct super_block *, ext4_group_t,
2865 unsigned long, ext4_fsblk_t,
2866 const char *, ...);
2867
2868#define EXT4_ERROR_INODE(inode, fmt, a...) \
2869 ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
2870
2871#define EXT4_ERROR_INODE_ERR(inode, err, fmt, a...) \
2872 __ext4_error_inode((inode), __func__, __LINE__, 0, (err), (fmt), ## a)
2873
2874#define ext4_error_inode_block(inode, block, err, fmt, a...) \
2875 __ext4_error_inode((inode), __func__, __LINE__, (block), (err), \
2876 (fmt), ## a)
2877
2878#define EXT4_ERROR_FILE(file, block, fmt, a...) \
2879 ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a)
2880
2881#ifdef CONFIG_PRINTK
2882
2883#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2884 __ext4_error_inode(inode, func, line, block, 0, fmt, ##__VA_ARGS__)
2885#define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \
2886 __ext4_error_inode((inode), (func), (line), (block), \
2887 (err), (fmt), ##__VA_ARGS__)
2888#define ext4_error_file(file, func, line, block, fmt, ...) \
2889 __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__)
2890#define ext4_error(sb, fmt, ...) \
2891 __ext4_error((sb), __func__, __LINE__, 0, 0, (fmt), ##__VA_ARGS__)
2892#define ext4_error_err(sb, err, fmt, ...) \
2893 __ext4_error((sb), __func__, __LINE__, (err), 0, (fmt), ##__VA_ARGS__)
2894#define ext4_abort(sb, err, fmt, ...) \
2895 __ext4_abort((sb), __func__, __LINE__, (err), (fmt), ##__VA_ARGS__)
2896#define ext4_warning(sb, fmt, ...) \
2897 __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2898#define ext4_warning_inode(inode, fmt, ...) \
2899 __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__)
2900#define ext4_msg(sb, level, fmt, ...) \
2901 __ext4_msg(sb, level, fmt, ##__VA_ARGS__)
2902#define dump_mmp_msg(sb, mmp, msg) \
2903 __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg)
2904#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2905 __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \
2906 fmt, ##__VA_ARGS__)
2907
2908#else
2909
2910#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2911do { \
2912 no_printk(fmt, ##__VA_ARGS__); \
2913 __ext4_error_inode(inode, "", 0, block, 0, " "); \
2914} while (0)
2915#define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \
2916do { \
2917 no_printk(fmt, ##__VA_ARGS__); \
2918 __ext4_error_inode(inode, "", 0, block, err, " "); \
2919} while (0)
2920#define ext4_error_file(file, func, line, block, fmt, ...) \
2921do { \
2922 no_printk(fmt, ##__VA_ARGS__); \
2923 __ext4_error_file(file, "", 0, block, " "); \
2924} while (0)
2925#define ext4_error(sb, fmt, ...) \
2926do { \
2927 no_printk(fmt, ##__VA_ARGS__); \
2928 __ext4_error(sb, "", 0, 0, 0, " "); \
2929} while (0)
2930#define ext4_error_err(sb, err, fmt, ...) \
2931do { \
2932 no_printk(fmt, ##__VA_ARGS__); \
2933 __ext4_error(sb, "", 0, err, 0, " "); \
2934} while (0)
2935#define ext4_abort(sb, err, fmt, ...) \
2936do { \
2937 no_printk(fmt, ##__VA_ARGS__); \
2938 __ext4_abort(sb, "", 0, err, " "); \
2939} while (0)
2940#define ext4_warning(sb, fmt, ...) \
2941do { \
2942 no_printk(fmt, ##__VA_ARGS__); \
2943 __ext4_warning(sb, "", 0, " "); \
2944} while (0)
2945#define ext4_warning_inode(inode, fmt, ...) \
2946do { \
2947 no_printk(fmt, ##__VA_ARGS__); \
2948 __ext4_warning_inode(inode, "", 0, " "); \
2949} while (0)
2950#define ext4_msg(sb, level, fmt, ...) \
2951do { \
2952 no_printk(fmt, ##__VA_ARGS__); \
2953 __ext4_msg(sb, "", " "); \
2954} while (0)
2955#define dump_mmp_msg(sb, mmp, msg) \
2956 __dump_mmp_msg(sb, mmp, "", 0, "")
2957#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2958do { \
2959 no_printk(fmt, ##__VA_ARGS__); \
2960 __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \
2961} while (0)
2962
2963#endif
2964
2965extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
2966 struct ext4_group_desc *bg);
2967extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
2968 struct ext4_group_desc *bg);
2969extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
2970 struct ext4_group_desc *bg);
2971extern __u32 ext4_free_group_clusters(struct super_block *sb,
2972 struct ext4_group_desc *bg);
2973extern __u32 ext4_free_inodes_count(struct super_block *sb,
2974 struct ext4_group_desc *bg);
2975extern __u32 ext4_used_dirs_count(struct super_block *sb,
2976 struct ext4_group_desc *bg);
2977extern __u32 ext4_itable_unused_count(struct super_block *sb,
2978 struct ext4_group_desc *bg);
2979extern void ext4_block_bitmap_set(struct super_block *sb,
2980 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2981extern void ext4_inode_bitmap_set(struct super_block *sb,
2982 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2983extern void ext4_inode_table_set(struct super_block *sb,
2984 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2985extern void ext4_free_group_clusters_set(struct super_block *sb,
2986 struct ext4_group_desc *bg,
2987 __u32 count);
2988extern void ext4_free_inodes_set(struct super_block *sb,
2989 struct ext4_group_desc *bg, __u32 count);
2990extern void ext4_used_dirs_set(struct super_block *sb,
2991 struct ext4_group_desc *bg, __u32 count);
2992extern void ext4_itable_unused_set(struct super_block *sb,
2993 struct ext4_group_desc *bg, __u32 count);
2994extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
2995 struct ext4_group_desc *gdp);
2996extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group,
2997 struct ext4_group_desc *gdp);
2998extern int ext4_register_li_request(struct super_block *sb,
2999 ext4_group_t first_not_zeroed);
3000
3001static inline int ext4_has_metadata_csum(struct super_block *sb)
3002{
3003 WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) &&
3004 !EXT4_SB(sb)->s_chksum_driver);
3005
3006 return ext4_has_feature_metadata_csum(sb) &&
3007 (EXT4_SB(sb)->s_chksum_driver != NULL);
3008}
3009
3010static inline int ext4_has_group_desc_csum(struct super_block *sb)
3011{
3012 return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb);
3013}
3014
3015static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
3016{
3017 return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
3018 le32_to_cpu(es->s_blocks_count_lo);
3019}
3020
3021static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
3022{
3023 return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
3024 le32_to_cpu(es->s_r_blocks_count_lo);
3025}
3026
3027static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
3028{
3029 return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
3030 le32_to_cpu(es->s_free_blocks_count_lo);
3031}
3032
3033static inline void ext4_blocks_count_set(struct ext4_super_block *es,
3034 ext4_fsblk_t blk)
3035{
3036 es->s_blocks_count_lo = cpu_to_le32((u32)blk);
3037 es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
3038}
3039
3040static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
3041 ext4_fsblk_t blk)
3042{
3043 es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
3044 es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
3045}
3046
3047static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
3048 ext4_fsblk_t blk)
3049{
3050 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
3051 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
3052}
3053
3054static inline loff_t ext4_isize(struct super_block *sb,
3055 struct ext4_inode *raw_inode)
3056{
3057 if (ext4_has_feature_largedir(sb) ||
3058 S_ISREG(le16_to_cpu(raw_inode->i_mode)))
3059 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
3060 le32_to_cpu(raw_inode->i_size_lo);
3061
3062 return (loff_t) le32_to_cpu(raw_inode->i_size_lo);
3063}
3064
3065static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
3066{
3067 raw_inode->i_size_lo = cpu_to_le32(i_size);
3068 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
3069}
3070
3071static inline
3072struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
3073 ext4_group_t group)
3074{
3075 struct ext4_group_info **grp_info;
3076 long indexv, indexh;
3077 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
3078 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
3079 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
3080 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
3081 return grp_info[indexh];
3082}
3083
3084
3085
3086
3087
3088
3089static inline ext4_group_t ext4_get_groups_count(struct super_block *sb)
3090{
3091 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
3092
3093 smp_rmb();
3094 return ngroups;
3095}
3096
3097static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi,
3098 ext4_group_t block_group)
3099{
3100 return block_group >> sbi->s_log_groups_per_flex;
3101}
3102
3103static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi)
3104{
3105 return 1 << sbi->s_log_groups_per_flex;
3106}
3107
3108#define ext4_std_error(sb, errno) \
3109do { \
3110 if ((errno)) \
3111 __ext4_std_error((sb), __func__, __LINE__, (errno)); \
3112} while (0)
3113
3114#ifdef CONFIG_SMP
3115
3116
3117
3118
3119#define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
3120#else
3121#define EXT4_FREECLUSTERS_WATERMARK 0
3122#endif
3123
3124
3125static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
3126{
3127 WARN_ON_ONCE(S_ISREG(inode->i_mode) &&
3128 !inode_is_locked(inode));
3129 down_write(&EXT4_I(inode)->i_data_sem);
3130 if (newsize > EXT4_I(inode)->i_disksize)
3131 WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize);
3132 up_write(&EXT4_I(inode)->i_data_sem);
3133}
3134
3135
3136static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize)
3137{
3138 int changed = 0;
3139
3140 if (newsize > inode->i_size) {
3141 i_size_write(inode, newsize);
3142 changed = 1;
3143 }
3144 if (newsize > EXT4_I(inode)->i_disksize) {
3145 ext4_update_i_disksize(inode, newsize);
3146 changed |= 2;
3147 }
3148 return changed;
3149}
3150
3151int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset,
3152 loff_t len);
3153
3154struct ext4_group_info {
3155 unsigned long bb_state;
3156 struct rb_root bb_free_root;
3157 ext4_grpblk_t bb_first_free;
3158 ext4_grpblk_t bb_free;
3159 ext4_grpblk_t bb_fragments;
3160 ext4_grpblk_t bb_largest_free_order;
3161 struct list_head bb_prealloc_list;
3162#ifdef DOUBLE_CHECK
3163 void *bb_bitmap;
3164#endif
3165 struct rw_semaphore alloc_sem;
3166 ext4_grpblk_t bb_counters[];
3167
3168
3169
3170};
3171
3172#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
3173#define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1
3174#define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2
3175#define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3
3176#define EXT4_GROUP_INFO_BBITMAP_CORRUPT \
3177 (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT)
3178#define EXT4_GROUP_INFO_IBITMAP_CORRUPT \
3179 (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT)
3180#define EXT4_GROUP_INFO_BBITMAP_READ_BIT 4
3181
3182#define EXT4_MB_GRP_NEED_INIT(grp) \
3183 (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
3184#define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \
3185 (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
3186#define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \
3187 (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
3188
3189#define EXT4_MB_GRP_WAS_TRIMMED(grp) \
3190 (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3191#define EXT4_MB_GRP_SET_TRIMMED(grp) \
3192 (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3193#define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \
3194 (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
3195#define EXT4_MB_GRP_TEST_AND_SET_READ(grp) \
3196 (test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state)))
3197
3198#define EXT4_MAX_CONTENTION 8
3199#define EXT4_CONTENTION_THRESHOLD 2
3200
3201static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb,
3202 ext4_group_t group)
3203{
3204 return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group);
3205}
3206
3207
3208
3209
3210
3211static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi)
3212{
3213 return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD);
3214}
3215
3216static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
3217{
3218 spinlock_t *lock = ext4_group_lock_ptr(sb, group);
3219 if (spin_trylock(lock))
3220
3221
3222
3223
3224 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0);
3225 else {
3226
3227
3228
3229
3230 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1,
3231 EXT4_MAX_CONTENTION);
3232 spin_lock(lock);
3233 }
3234}
3235
3236static inline void ext4_unlock_group(struct super_block *sb,
3237 ext4_group_t group)
3238{
3239 spin_unlock(ext4_group_lock_ptr(sb, group));
3240}
3241
3242
3243
3244
3245#define ext4_check_indirect_blockref(inode, bh) \
3246 ext4_check_blockref(__func__, __LINE__, inode, \
3247 (__le32 *)(bh)->b_data, \
3248 EXT4_ADDR_PER_BLOCK((inode)->i_sb))
3249
3250#define ext4_ind_check_inode(inode) \
3251 ext4_check_blockref(__func__, __LINE__, inode, \
3252 EXT4_I(inode)->i_data, \
3253 EXT4_NDIR_BLOCKS)
3254
3255
3256
3257
3258
3259
3260extern const struct file_operations ext4_dir_operations;
3261
3262#ifdef CONFIG_UNICODE
3263extern const struct dentry_operations ext4_dentry_ops;
3264#endif
3265
3266
3267extern const struct inode_operations ext4_file_inode_operations;
3268extern const struct file_operations ext4_file_operations;
3269extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
3270
3271
3272extern int ext4_get_max_inline_size(struct inode *inode);
3273extern int ext4_find_inline_data_nolock(struct inode *inode);
3274extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
3275 unsigned int len);
3276extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
3277
3278extern int ext4_readpage_inline(struct inode *inode, struct page *page);
3279extern int ext4_try_to_write_inline_data(struct address_space *mapping,
3280 struct inode *inode,
3281 loff_t pos, unsigned len,
3282 unsigned flags,
3283 struct page **pagep);
3284extern int ext4_write_inline_data_end(struct inode *inode,
3285 loff_t pos, unsigned len,
3286 unsigned copied,
3287 struct page *page);
3288extern struct buffer_head *
3289ext4_journalled_write_inline_data(struct inode *inode,
3290 unsigned len,
3291 struct page *page);
3292extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
3293 struct inode *inode,
3294 loff_t pos, unsigned len,
3295 unsigned flags,
3296 struct page **pagep,
3297 void **fsdata);
3298extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
3299 unsigned len, unsigned copied,
3300 struct page *page);
3301extern int ext4_try_add_inline_entry(handle_t *handle,
3302 struct ext4_filename *fname,
3303 struct inode *dir, struct inode *inode);
3304extern int ext4_try_create_inline_dir(handle_t *handle,
3305 struct inode *parent,
3306 struct inode *inode);
3307extern int ext4_read_inline_dir(struct file *filp,
3308 struct dir_context *ctx,
3309 int *has_inline_data);
3310extern int ext4_inlinedir_to_tree(struct file *dir_file,
3311 struct inode *dir, ext4_lblk_t block,
3312 struct dx_hash_info *hinfo,
3313 __u32 start_hash, __u32 start_minor_hash,
3314 int *has_inline_data);
3315extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
3316 struct ext4_filename *fname,
3317 struct ext4_dir_entry_2 **res_dir,
3318 int *has_inline_data);
3319extern int ext4_delete_inline_entry(handle_t *handle,
3320 struct inode *dir,
3321 struct ext4_dir_entry_2 *de_del,
3322 struct buffer_head *bh,
3323 int *has_inline_data);
3324extern bool empty_inline_dir(struct inode *dir, int *has_inline_data);
3325extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
3326 struct ext4_dir_entry_2 **parent_de,
3327 int *retval);
3328extern int ext4_inline_data_fiemap(struct inode *inode,
3329 struct fiemap_extent_info *fieinfo,
3330 int *has_inline, __u64 start, __u64 len);
3331
3332struct iomap;
3333extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap);
3334
3335extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline);
3336
3337extern int ext4_convert_inline_data(struct inode *inode);
3338
3339static inline int ext4_has_inline_data(struct inode *inode)
3340{
3341 return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) &&
3342 EXT4_I(inode)->i_inline_off;
3343}
3344
3345
3346extern const struct inode_operations ext4_dir_inode_operations;
3347extern const struct inode_operations ext4_special_inode_operations;
3348extern struct dentry *ext4_get_parent(struct dentry *child);
3349extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
3350 struct ext4_dir_entry_2 *de,
3351 int blocksize, int csum_size,
3352 unsigned int parent_ino, int dotdot_real_len);
3353extern void ext4_initialize_dirent_tail(struct buffer_head *bh,
3354 unsigned int blocksize);
3355extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode,
3356 struct buffer_head *bh);
3357extern int ext4_ci_compare(const struct inode *parent,
3358 const struct qstr *fname,
3359 const struct qstr *entry, bool quick);
3360
3361#define S_SHIFT 12
3362static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
3363 [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
3364 [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
3365 [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
3366 [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
3367 [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
3368 [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
3369 [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
3370};
3371
3372static inline void ext4_set_de_type(struct super_block *sb,
3373 struct ext4_dir_entry_2 *de,
3374 umode_t mode) {
3375 if (ext4_has_feature_filetype(sb))
3376 de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
3377}
3378
3379
3380extern int ext4_mpage_readpages(struct inode *inode,
3381 struct readahead_control *rac, struct page *page);
3382extern int __init ext4_init_post_read_processing(void);
3383extern void ext4_exit_post_read_processing(void);
3384
3385
3386extern const struct inode_operations ext4_encrypted_symlink_inode_operations;
3387extern const struct inode_operations ext4_symlink_inode_operations;
3388extern const struct inode_operations ext4_fast_symlink_inode_operations;
3389
3390
3391extern int ext4_register_sysfs(struct super_block *sb);
3392extern void ext4_unregister_sysfs(struct super_block *sb);
3393extern int __init ext4_init_sysfs(void);
3394extern void ext4_exit_sysfs(void);
3395
3396
3397extern void ext4_release_system_zone(struct super_block *sb);
3398extern int ext4_setup_system_zone(struct super_block *sb);
3399extern int __init ext4_init_system_zone(void);
3400extern void ext4_exit_system_zone(void);
3401extern int ext4_inode_block_valid(struct inode *inode,
3402 ext4_fsblk_t start_blk,
3403 unsigned int count);
3404extern int ext4_check_blockref(const char *, unsigned int,
3405 struct inode *, __le32 *, unsigned int);
3406
3407
3408struct ext4_ext_path;
3409struct ext4_extent;
3410
3411
3412
3413
3414
3415#define EXT_MAX_BLOCKS 0xffffffff
3416
3417extern void ext4_ext_tree_init(handle_t *handle, struct inode *inode);
3418extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
3419extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
3420 struct ext4_map_blocks *map, int flags);
3421extern int ext4_ext_truncate(handle_t *, struct inode *);
3422extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
3423 ext4_lblk_t end);
3424extern void ext4_ext_init(struct super_block *);
3425extern void ext4_ext_release(struct super_block *);
3426extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
3427 loff_t len);
3428extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode,
3429 loff_t offset, ssize_t len);
3430extern int ext4_convert_unwritten_io_end_vec(handle_t *handle,
3431 ext4_io_end_t *io_end);
3432extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
3433 struct ext4_map_blocks *map, int flags);
3434extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
3435 int num,
3436 struct ext4_ext_path *path);
3437extern int ext4_ext_insert_extent(handle_t *, struct inode *,
3438 struct ext4_ext_path **,
3439 struct ext4_extent *, int);
3440extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t,
3441 struct ext4_ext_path **,
3442 int flags);
3443extern void ext4_ext_drop_refs(struct ext4_ext_path *);
3444extern int ext4_ext_check_inode(struct inode *inode);
3445extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path);
3446extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
3447 __u64 start, __u64 len);
3448extern int ext4_get_es_cache(struct inode *inode,
3449 struct fiemap_extent_info *fieinfo,
3450 __u64 start, __u64 len);
3451extern int ext4_ext_precache(struct inode *inode);
3452extern int ext4_swap_extents(handle_t *handle, struct inode *inode1,
3453 struct inode *inode2, ext4_lblk_t lblk1,
3454 ext4_lblk_t lblk2, ext4_lblk_t count,
3455 int mark_unwritten,int *err);
3456extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu);
3457extern int ext4_datasem_ensure_credits(handle_t *handle, struct inode *inode,
3458 int check_cred, int restart_cred,
3459 int revoke_cred);
3460
3461
3462
3463extern void ext4_double_down_write_data_sem(struct inode *first,
3464 struct inode *second);
3465extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
3466 struct inode *donor_inode);
3467extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
3468 __u64 start_orig, __u64 start_donor,
3469 __u64 len, __u64 *moved_len);
3470
3471
3472extern int __init ext4_init_pageio(void);
3473extern void ext4_exit_pageio(void);
3474extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
3475extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end);
3476extern int ext4_put_io_end(ext4_io_end_t *io_end);
3477extern void ext4_put_io_end_defer(ext4_io_end_t *io_end);
3478extern void ext4_io_submit_init(struct ext4_io_submit *io,
3479 struct writeback_control *wbc);
3480extern void ext4_end_io_rsv_work(struct work_struct *work);
3481extern void ext4_io_submit(struct ext4_io_submit *io);
3482extern int ext4_bio_write_page(struct ext4_io_submit *io,
3483 struct page *page,
3484 int len,
3485 struct writeback_control *wbc,
3486 bool keep_towrite);
3487extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end);
3488extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end);
3489
3490
3491extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
3492
3493
3494extern const struct fsverity_operations ext4_verityops;
3495
3496
3497
3498
3499
3500
3501#define BH_BITMAP_UPTODATE BH_JBDPrivateStart
3502
3503static inline int bitmap_uptodate(struct buffer_head *bh)
3504{
3505 return (buffer_uptodate(bh) &&
3506 test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state));
3507}
3508static inline void set_bitmap_uptodate(struct buffer_head *bh)
3509{
3510 set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
3511}
3512
3513#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
3514
3515
3516#define EXT4_WQ_HASH_SZ 37
3517#define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\
3518 EXT4_WQ_HASH_SZ])
3519extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
3520
3521extern int ext4_resize_begin(struct super_block *sb);
3522extern void ext4_resize_end(struct super_block *sb);
3523
3524static inline void ext4_set_io_unwritten_flag(struct inode *inode,
3525 struct ext4_io_end *io_end)
3526{
3527 if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
3528 io_end->flag |= EXT4_IO_END_UNWRITTEN;
3529 atomic_inc(&EXT4_I(inode)->i_unwritten);
3530 }
3531}
3532
3533static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end)
3534{
3535 struct inode *inode = io_end->inode;
3536
3537 if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
3538 io_end->flag &= ~EXT4_IO_END_UNWRITTEN;
3539
3540 if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
3541 wake_up_all(ext4_ioend_wq(inode));
3542 }
3543}
3544
3545extern const struct iomap_ops ext4_iomap_ops;
3546extern const struct iomap_ops ext4_iomap_overwrite_ops;
3547extern const struct iomap_ops ext4_iomap_report_ops;
3548
3549static inline int ext4_buffer_uptodate(struct buffer_head *bh)
3550{
3551
3552
3553
3554
3555
3556
3557 if (!buffer_uptodate(bh) && buffer_write_io_error(bh))
3558 set_buffer_uptodate(bh);
3559 return buffer_uptodate(bh);
3560}
3561
3562#endif
3563
3564#define EFSBADCRC EBADMSG
3565#define EFSCORRUPTED EUCLEAN
3566
3567#endif
3568