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16#ifndef _EXT4_H
17#define _EXT4_H
18
19#include <linux/types.h>
20#include <linux/blkdev.h>
21#include <linux/magic.h>
22#include <linux/jbd2.h>
23#include <linux/quota.h>
24#include <linux/rwsem.h>
25#include <linux/rbtree.h>
26#include <linux/seqlock.h>
27#include <linux/mutex.h>
28#include <linux/timer.h>
29#include <linux/wait.h>
30#include <linux/blockgroup_lock.h>
31#include <linux/percpu_counter.h>
32#include <linux/ratelimit.h>
33#include <crypto/hash.h>
34#ifdef __KERNEL__
35#include <linux/compat.h>
36#endif
37
38
39
40
41
42
43
44
45#undef EXT4FS_DEBUG
46
47
48
49
50#ifdef EXT4FS_DEBUG
51#define ext4_debug(f, a...) \
52 do { \
53 printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \
54 __FILE__, __LINE__, __func__); \
55 printk(KERN_DEBUG f, ## a); \
56 } while (0)
57#else
58#define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
59#endif
60
61
62
63
64#define EXT_DEBUG__
65#ifdef EXT_DEBUG
66#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
67#else
68#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
69#endif
70
71#define EXT4_ERROR_INODE(inode, fmt, a...) \
72 ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
73
74#define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \
75 ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a)
76
77#define EXT4_ERROR_FILE(file, block, fmt, a...) \
78 ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a)
79
80
81typedef int ext4_grpblk_t;
82
83
84typedef unsigned long long ext4_fsblk_t;
85
86
87typedef __u32 ext4_lblk_t;
88
89
90typedef unsigned int ext4_group_t;
91
92
93
94
95
96
97
98
99
100#define EXT4_MB_HINT_MERGE 0x0001
101
102#define EXT4_MB_HINT_RESERVED 0x0002
103
104#define EXT4_MB_HINT_METADATA 0x0004
105
106#define EXT4_MB_HINT_FIRST 0x0008
107
108#define EXT4_MB_HINT_BEST 0x0010
109
110#define EXT4_MB_HINT_DATA 0x0020
111
112#define EXT4_MB_HINT_NOPREALLOC 0x0040
113
114#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
115
116#define EXT4_MB_HINT_GOAL_ONLY 0x0100
117
118#define EXT4_MB_HINT_TRY_GOAL 0x0200
119
120#define EXT4_MB_DELALLOC_RESERVED 0x0400
121
122#define EXT4_MB_STREAM_ALLOC 0x0800
123
124#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
125
126#define EXT4_MB_USE_RESERVED 0x2000
127
128struct ext4_allocation_request {
129
130 struct inode *inode;
131
132 unsigned int len;
133
134 ext4_lblk_t logical;
135
136 ext4_lblk_t lleft;
137
138 ext4_lblk_t lright;
139
140 ext4_fsblk_t goal;
141
142 ext4_fsblk_t pleft;
143
144 ext4_fsblk_t pright;
145
146 unsigned int flags;
147};
148
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150
151
152
153
154
155
156#define EXT4_MAP_NEW (1 << BH_New)
157#define EXT4_MAP_MAPPED (1 << BH_Mapped)
158#define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten)
159#define EXT4_MAP_BOUNDARY (1 << BH_Boundary)
160#define EXT4_MAP_UNINIT (1 << BH_Uninit)
161
162
163
164
165
166
167
168#define EXT4_MAP_FROM_CLUSTER (1 << BH_AllocFromCluster)
169#define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
170 EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\
171 EXT4_MAP_UNINIT | EXT4_MAP_FROM_CLUSTER)
172
173struct ext4_map_blocks {
174 ext4_fsblk_t m_pblk;
175 ext4_lblk_t m_lblk;
176 unsigned int m_len;
177 unsigned int m_flags;
178};
179
180
181
182
183#define EXT4_IO_END_UNWRITTEN 0x0001
184
185
186
187
188
189typedef struct ext4_io_end {
190 struct list_head list;
191 handle_t *handle;
192
193 struct inode *inode;
194 struct bio *bio;
195
196 unsigned int flag;
197 loff_t offset;
198 ssize_t size;
199 atomic_t count;
200} ext4_io_end_t;
201
202struct ext4_io_submit {
203 int io_op;
204 struct bio *io_bio;
205 ext4_io_end_t *io_end;
206 sector_t io_next_block;
207};
208
209
210
211
212#define EXT4_BAD_INO 1
213#define EXT4_ROOT_INO 2
214#define EXT4_USR_QUOTA_INO 3
215#define EXT4_GRP_QUOTA_INO 4
216#define EXT4_BOOT_LOADER_INO 5
217#define EXT4_UNDEL_DIR_INO 6
218#define EXT4_RESIZE_INO 7
219#define EXT4_JOURNAL_INO 8
220
221
222#define EXT4_GOOD_OLD_FIRST_INO 11
223
224
225
226
227#define EXT4_LINK_MAX 65000
228
229
230
231
232#define EXT4_MIN_BLOCK_SIZE 1024
233#define EXT4_MAX_BLOCK_SIZE 65536
234#define EXT4_MIN_BLOCK_LOG_SIZE 10
235#define EXT4_MAX_BLOCK_LOG_SIZE 16
236#ifdef __KERNEL__
237# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
238#else
239# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
240#endif
241#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
242#define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \
243 EXT4_SB(s)->s_cluster_bits)
244#ifdef __KERNEL__
245# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
246# define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits)
247#else
248# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
249#endif
250#ifdef __KERNEL__
251#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits)
252#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size)
253#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino)
254#else
255#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
256 EXT4_GOOD_OLD_INODE_SIZE : \
257 (s)->s_inode_size)
258#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
259 EXT4_GOOD_OLD_FIRST_INO : \
260 (s)->s_first_ino)
261#endif
262#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
263
264
265#define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits)
266
267#define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits)
268
269#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \
270 (sbi)->s_cluster_bits)
271
272#define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \
273 ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
274#define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \
275 ~((ext4_lblk_t) (s)->s_cluster_ratio - 1))
276
277#define EXT4_PBLK_COFF(s, pblk) ((pblk) & \
278 ((ext4_fsblk_t) (s)->s_cluster_ratio - 1))
279#define EXT4_LBLK_COFF(s, lblk) ((lblk) & \
280 ((ext4_lblk_t) (s)->s_cluster_ratio - 1))
281
282
283
284
285struct ext4_group_desc
286{
287 __le32 bg_block_bitmap_lo;
288 __le32 bg_inode_bitmap_lo;
289 __le32 bg_inode_table_lo;
290 __le16 bg_free_blocks_count_lo;
291 __le16 bg_free_inodes_count_lo;
292 __le16 bg_used_dirs_count_lo;
293 __le16 bg_flags;
294 __le32 bg_exclude_bitmap_lo;
295 __le16 bg_block_bitmap_csum_lo;
296 __le16 bg_inode_bitmap_csum_lo;
297 __le16 bg_itable_unused_lo;
298 __le16 bg_checksum;
299 __le32 bg_block_bitmap_hi;
300 __le32 bg_inode_bitmap_hi;
301 __le32 bg_inode_table_hi;
302 __le16 bg_free_blocks_count_hi;
303 __le16 bg_free_inodes_count_hi;
304 __le16 bg_used_dirs_count_hi;
305 __le16 bg_itable_unused_hi;
306 __le32 bg_exclude_bitmap_hi;
307 __le16 bg_block_bitmap_csum_hi;
308 __le16 bg_inode_bitmap_csum_hi;
309 __u32 bg_reserved;
310};
311
312#define EXT4_BG_INODE_BITMAP_CSUM_HI_END \
313 (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \
314 sizeof(__le16))
315#define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \
316 (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \
317 sizeof(__le16))
318
319
320
321
322
323struct flex_groups {
324 atomic64_t free_clusters;
325 atomic_t free_inodes;
326 atomic_t used_dirs;
327};
328
329#define EXT4_BG_INODE_UNINIT 0x0001
330#define EXT4_BG_BLOCK_UNINIT 0x0002
331#define EXT4_BG_INODE_ZEROED 0x0004
332
333
334
335
336#define EXT4_MIN_DESC_SIZE 32
337#define EXT4_MIN_DESC_SIZE_64BIT 64
338#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
339#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
340#ifdef __KERNEL__
341# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group)
342# define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group)
343# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block)
344# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group)
345# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits)
346#else
347# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
348# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
349# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
350#endif
351
352
353
354
355#define EXT4_NDIR_BLOCKS 12
356#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
357#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
358#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
359#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
360
361
362
363
364#define EXT4_SECRM_FL 0x00000001
365#define EXT4_UNRM_FL 0x00000002
366#define EXT4_COMPR_FL 0x00000004
367#define EXT4_SYNC_FL 0x00000008
368#define EXT4_IMMUTABLE_FL 0x00000010
369#define EXT4_APPEND_FL 0x00000020
370#define EXT4_NODUMP_FL 0x00000040
371#define EXT4_NOATIME_FL 0x00000080
372
373#define EXT4_DIRTY_FL 0x00000100
374#define EXT4_COMPRBLK_FL 0x00000200
375#define EXT4_NOCOMPR_FL 0x00000400
376#define EXT4_ECOMPR_FL 0x00000800
377
378#define EXT4_INDEX_FL 0x00001000
379#define EXT4_IMAGIC_FL 0x00002000
380#define EXT4_JOURNAL_DATA_FL 0x00004000
381#define EXT4_NOTAIL_FL 0x00008000
382#define EXT4_DIRSYNC_FL 0x00010000
383#define EXT4_TOPDIR_FL 0x00020000
384#define EXT4_HUGE_FILE_FL 0x00040000
385#define EXT4_EXTENTS_FL 0x00080000
386#define EXT4_EA_INODE_FL 0x00200000
387#define EXT4_EOFBLOCKS_FL 0x00400000
388#define EXT4_INLINE_DATA_FL 0x10000000
389#define EXT4_RESERVED_FL 0x80000000
390
391#define EXT4_FL_USER_VISIBLE 0x004BDFFF
392#define EXT4_FL_USER_MODIFIABLE 0x004380FF
393
394
395#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
396 EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
397 EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
398 EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
399
400
401#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
402
403
404#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
405
406
407static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
408{
409 if (S_ISDIR(mode))
410 return flags;
411 else if (S_ISREG(mode))
412 return flags & EXT4_REG_FLMASK;
413 else
414 return flags & EXT4_OTHER_FLMASK;
415}
416
417
418
419
420enum {
421 EXT4_INODE_SECRM = 0,
422 EXT4_INODE_UNRM = 1,
423 EXT4_INODE_COMPR = 2,
424 EXT4_INODE_SYNC = 3,
425 EXT4_INODE_IMMUTABLE = 4,
426 EXT4_INODE_APPEND = 5,
427 EXT4_INODE_NODUMP = 6,
428 EXT4_INODE_NOATIME = 7,
429
430 EXT4_INODE_DIRTY = 8,
431 EXT4_INODE_COMPRBLK = 9,
432 EXT4_INODE_NOCOMPR = 10,
433 EXT4_INODE_ECOMPR = 11,
434
435 EXT4_INODE_INDEX = 12,
436 EXT4_INODE_IMAGIC = 13,
437 EXT4_INODE_JOURNAL_DATA = 14,
438 EXT4_INODE_NOTAIL = 15,
439 EXT4_INODE_DIRSYNC = 16,
440 EXT4_INODE_TOPDIR = 17,
441 EXT4_INODE_HUGE_FILE = 18,
442 EXT4_INODE_EXTENTS = 19,
443 EXT4_INODE_EA_INODE = 21,
444 EXT4_INODE_EOFBLOCKS = 22,
445 EXT4_INODE_INLINE_DATA = 28,
446 EXT4_INODE_RESERVED = 31,
447};
448
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459
460
461
462#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
463#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
464
465static inline void ext4_check_flag_values(void)
466{
467 CHECK_FLAG_VALUE(SECRM);
468 CHECK_FLAG_VALUE(UNRM);
469 CHECK_FLAG_VALUE(COMPR);
470 CHECK_FLAG_VALUE(SYNC);
471 CHECK_FLAG_VALUE(IMMUTABLE);
472 CHECK_FLAG_VALUE(APPEND);
473 CHECK_FLAG_VALUE(NODUMP);
474 CHECK_FLAG_VALUE(NOATIME);
475 CHECK_FLAG_VALUE(DIRTY);
476 CHECK_FLAG_VALUE(COMPRBLK);
477 CHECK_FLAG_VALUE(NOCOMPR);
478 CHECK_FLAG_VALUE(ECOMPR);
479 CHECK_FLAG_VALUE(INDEX);
480 CHECK_FLAG_VALUE(IMAGIC);
481 CHECK_FLAG_VALUE(JOURNAL_DATA);
482 CHECK_FLAG_VALUE(NOTAIL);
483 CHECK_FLAG_VALUE(DIRSYNC);
484 CHECK_FLAG_VALUE(TOPDIR);
485 CHECK_FLAG_VALUE(HUGE_FILE);
486 CHECK_FLAG_VALUE(EXTENTS);
487 CHECK_FLAG_VALUE(EA_INODE);
488 CHECK_FLAG_VALUE(EOFBLOCKS);
489 CHECK_FLAG_VALUE(INLINE_DATA);
490 CHECK_FLAG_VALUE(RESERVED);
491}
492
493
494struct ext4_new_group_input {
495 __u32 group;
496 __u64 block_bitmap;
497 __u64 inode_bitmap;
498 __u64 inode_table;
499 __u32 blocks_count;
500 __u16 reserved_blocks;
501 __u16 unused;
502};
503
504#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
505struct compat_ext4_new_group_input {
506 u32 group;
507 compat_u64 block_bitmap;
508 compat_u64 inode_bitmap;
509 compat_u64 inode_table;
510 u32 blocks_count;
511 u16 reserved_blocks;
512 u16 unused;
513};
514#endif
515
516
517struct ext4_new_group_data {
518 __u32 group;
519 __u64 block_bitmap;
520 __u64 inode_bitmap;
521 __u64 inode_table;
522 __u32 blocks_count;
523 __u16 reserved_blocks;
524 __u16 unused;
525 __u32 free_blocks_count;
526};
527
528
529enum {
530 BLOCK_BITMAP = 0,
531 INODE_BITMAP,
532 INODE_TABLE,
533 GROUP_TABLE_COUNT,
534};
535
536
537
538
539
540
541#define EXT4_GET_BLOCKS_CREATE 0x0001
542
543#define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002
544#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\
545 EXT4_GET_BLOCKS_CREATE)
546
547
548#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
549
550
551
552#define EXT4_GET_BLOCKS_PRE_IO 0x0008
553#define EXT4_GET_BLOCKS_CONVERT 0x0010
554#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
555 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
556
557#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
558 EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
559
560
561#define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020
562
563#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
564
565#define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080
566
567#define EXT4_GET_BLOCKS_NO_LOCK 0x0100
568
569#define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200
570
571
572
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577
578
579
580#define EXT4_EX_NOCACHE 0x0400
581#define EXT4_EX_FORCE_CACHE 0x0800
582
583
584
585
586#define EXT4_FREE_BLOCKS_METADATA 0x0001
587#define EXT4_FREE_BLOCKS_FORGET 0x0002
588#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
589#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
590#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010
591#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020
592#define EXT4_FREE_BLOCKS_RESERVE 0x0040
593
594
595
596
597#define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS
598#define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS
599#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
600#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
601#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
602#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
603#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
604#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
605#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
606#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
607#define EXT4_IOC_MIGRATE _IO('f', 9)
608
609
610#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
611#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
612#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
613#define EXT4_IOC_SWAP_BOOT _IO('f', 17)
614#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18)
615
616#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
617
618
619
620#define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS
621#define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS
622#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
623#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
624#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
625#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
626#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
627#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input)
628#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
629#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
630#endif
631
632
633#define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
634
635
636
637
638struct ext4_inode {
639 __le16 i_mode;
640 __le16 i_uid;
641 __le32 i_size_lo;
642 __le32 i_atime;
643 __le32 i_ctime;
644 __le32 i_mtime;
645 __le32 i_dtime;
646 __le16 i_gid;
647 __le16 i_links_count;
648 __le32 i_blocks_lo;
649 __le32 i_flags;
650 union {
651 struct {
652 __le32 l_i_version;
653 } linux1;
654 struct {
655 __u32 h_i_translator;
656 } hurd1;
657 struct {
658 __u32 m_i_reserved1;
659 } masix1;
660 } osd1;
661 __le32 i_block[EXT4_N_BLOCKS];
662 __le32 i_generation;
663 __le32 i_file_acl_lo;
664 __le32 i_size_high;
665 __le32 i_obso_faddr;
666 union {
667 struct {
668 __le16 l_i_blocks_high;
669 __le16 l_i_file_acl_high;
670 __le16 l_i_uid_high;
671 __le16 l_i_gid_high;
672 __le16 l_i_checksum_lo;
673 __le16 l_i_reserved;
674 } linux2;
675 struct {
676 __le16 h_i_reserved1;
677 __u16 h_i_mode_high;
678 __u16 h_i_uid_high;
679 __u16 h_i_gid_high;
680 __u32 h_i_author;
681 } hurd2;
682 struct {
683 __le16 h_i_reserved1;
684 __le16 m_i_file_acl_high;
685 __u32 m_i_reserved2[2];
686 } masix2;
687 } osd2;
688 __le16 i_extra_isize;
689 __le16 i_checksum_hi;
690 __le32 i_ctime_extra;
691 __le32 i_mtime_extra;
692 __le32 i_atime_extra;
693 __le32 i_crtime;
694 __le32 i_crtime_extra;
695 __le32 i_version_hi;
696};
697
698struct move_extent {
699 __u32 reserved;
700 __u32 donor_fd;
701 __u64 orig_start;
702 __u64 donor_start;
703 __u64 len;
704 __u64 moved_len;
705};
706
707#define EXT4_EPOCH_BITS 2
708#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
709#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
710
711
712
713
714
715
716
717
718
719
720
721#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \
722 ((offsetof(typeof(*ext4_inode), field) + \
723 sizeof((ext4_inode)->field)) \
724 <= (EXT4_GOOD_OLD_INODE_SIZE + \
725 (einode)->i_extra_isize)) \
726
727static inline __le32 ext4_encode_extra_time(struct timespec *time)
728{
729 return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
730 (time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) |
731 ((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK));
732}
733
734static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
735{
736 if (sizeof(time->tv_sec) > 4)
737 time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
738 << 32;
739 time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
740}
741
742#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
743do { \
744 (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
745 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
746 (raw_inode)->xtime ## _extra = \
747 ext4_encode_extra_time(&(inode)->xtime); \
748} while (0)
749
750#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
751do { \
752 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
753 (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \
754 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
755 (raw_inode)->xtime ## _extra = \
756 ext4_encode_extra_time(&(einode)->xtime); \
757} while (0)
758
759#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \
760do { \
761 (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \
762 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
763 ext4_decode_extra_time(&(inode)->xtime, \
764 raw_inode->xtime ## _extra); \
765 else \
766 (inode)->xtime.tv_nsec = 0; \
767} while (0)
768
769#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \
770do { \
771 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
772 (einode)->xtime.tv_sec = \
773 (signed)le32_to_cpu((raw_inode)->xtime); \
774 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
775 ext4_decode_extra_time(&(einode)->xtime, \
776 raw_inode->xtime ## _extra); \
777 else \
778 (einode)->xtime.tv_nsec = 0; \
779} while (0)
780
781#define i_disk_version osd1.linux1.l_i_version
782
783#if defined(__KERNEL__) || defined(__linux__)
784#define i_reserved1 osd1.linux1.l_i_reserved1
785#define i_file_acl_high osd2.linux2.l_i_file_acl_high
786#define i_blocks_high osd2.linux2.l_i_blocks_high
787#define i_uid_low i_uid
788#define i_gid_low i_gid
789#define i_uid_high osd2.linux2.l_i_uid_high
790#define i_gid_high osd2.linux2.l_i_gid_high
791#define i_checksum_lo osd2.linux2.l_i_checksum_lo
792
793#elif defined(__GNU__)
794
795#define i_translator osd1.hurd1.h_i_translator
796#define i_uid_high osd2.hurd2.h_i_uid_high
797#define i_gid_high osd2.hurd2.h_i_gid_high
798#define i_author osd2.hurd2.h_i_author
799
800#elif defined(__masix__)
801
802#define i_reserved1 osd1.masix1.m_i_reserved1
803#define i_file_acl_high osd2.masix2.m_i_file_acl_high
804#define i_reserved2 osd2.masix2.m_i_reserved2
805
806#endif
807
808#include "extents_status.h"
809
810
811
812
813struct ext4_inode_info {
814 __le32 i_data[15];
815 __u32 i_dtime;
816 ext4_fsblk_t i_file_acl;
817
818
819
820
821
822
823
824
825 ext4_group_t i_block_group;
826 ext4_lblk_t i_dir_start_lookup;
827#if (BITS_PER_LONG < 64)
828 unsigned long i_state_flags;
829#endif
830 unsigned long i_flags;
831
832
833
834
835
836
837
838
839 struct rw_semaphore xattr_sem;
840
841 struct list_head i_orphan;
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858 loff_t i_disksize;
859
860
861
862
863
864
865
866
867
868
869
870 struct rw_semaphore i_data_sem;
871 struct inode vfs_inode;
872 struct jbd2_inode *jinode;
873
874
875
876
877
878 struct timespec i_crtime;
879
880
881 struct list_head i_prealloc_list;
882 spinlock_t i_prealloc_lock;
883
884
885 struct ext4_es_tree i_es_tree;
886 rwlock_t i_es_lock;
887 struct list_head i_es_lru;
888 unsigned int i_es_lru_nr;
889 unsigned long i_touch_when;
890
891
892 ext4_group_t i_last_alloc_group;
893
894
895
896 unsigned int i_reserved_data_blocks;
897 unsigned int i_reserved_meta_blocks;
898 unsigned int i_allocated_meta_blocks;
899 ext4_lblk_t i_da_metadata_calc_last_lblock;
900 int i_da_metadata_calc_len;
901
902
903 __u16 i_extra_isize;
904
905
906 u16 i_inline_off;
907 u16 i_inline_size;
908
909#ifdef CONFIG_QUOTA
910
911 qsize_t i_reserved_quota;
912#endif
913
914
915 spinlock_t i_completed_io_lock;
916
917
918
919
920 struct list_head i_rsv_conversion_list;
921
922
923
924
925 atomic_t i_ioend_count;
926 atomic_t i_unwritten;
927 struct work_struct i_rsv_conversion_work;
928
929 spinlock_t i_block_reservation_lock;
930
931
932
933
934
935 tid_t i_sync_tid;
936 tid_t i_datasync_tid;
937
938
939 __u32 i_csum_seed;
940};
941
942
943
944
945#define EXT4_VALID_FS 0x0001
946#define EXT4_ERROR_FS 0x0002
947#define EXT4_ORPHAN_FS 0x0004
948
949
950
951
952#define EXT2_FLAGS_SIGNED_HASH 0x0001
953#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
954#define EXT2_FLAGS_TEST_FILESYS 0x0004
955
956
957
958
959#define EXT4_MOUNT_GRPID 0x00004
960#define EXT4_MOUNT_DEBUG 0x00008
961#define EXT4_MOUNT_ERRORS_CONT 0x00010
962#define EXT4_MOUNT_ERRORS_RO 0x00020
963#define EXT4_MOUNT_ERRORS_PANIC 0x00040
964#define EXT4_MOUNT_ERRORS_MASK 0x00070
965#define EXT4_MOUNT_MINIX_DF 0x00080
966#define EXT4_MOUNT_NOLOAD 0x00100
967#define EXT4_MOUNT_DATA_FLAGS 0x00C00
968#define EXT4_MOUNT_JOURNAL_DATA 0x00400
969#define EXT4_MOUNT_ORDERED_DATA 0x00800
970#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
971#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
972#define EXT4_MOUNT_NO_UID32 0x02000
973#define EXT4_MOUNT_XATTR_USER 0x04000
974#define EXT4_MOUNT_POSIX_ACL 0x08000
975#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
976#define EXT4_MOUNT_BARRIER 0x20000
977#define EXT4_MOUNT_QUOTA 0x80000
978#define EXT4_MOUNT_USRQUOTA 0x100000
979#define EXT4_MOUNT_GRPQUOTA 0x200000
980#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
981#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
982#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
983#define EXT4_MOUNT_DELALLOC 0x8000000
984#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
985#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
986#define EXT4_MOUNT_DISCARD 0x40000000
987#define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000
988
989
990
991
992
993
994#define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001
995
996#define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002
997
998
999
1000#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \
1001 ~EXT4_MOUNT_##opt
1002#define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \
1003 EXT4_MOUNT_##opt
1004#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \
1005 EXT4_MOUNT_##opt)
1006
1007#define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \
1008 ~EXT4_MOUNT2_##opt
1009#define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \
1010 EXT4_MOUNT2_##opt
1011#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \
1012 EXT4_MOUNT2_##opt)
1013
1014#define ext4_test_and_set_bit __test_and_set_bit_le
1015#define ext4_set_bit __set_bit_le
1016#define ext4_set_bit_atomic ext2_set_bit_atomic
1017#define ext4_test_and_clear_bit __test_and_clear_bit_le
1018#define ext4_clear_bit __clear_bit_le
1019#define ext4_clear_bit_atomic ext2_clear_bit_atomic
1020#define ext4_test_bit test_bit_le
1021#define ext4_find_next_zero_bit find_next_zero_bit_le
1022#define ext4_find_next_bit find_next_bit_le
1023
1024extern void ext4_set_bits(void *bm, int cur, int len);
1025
1026
1027
1028
1029#define EXT4_DFL_MAX_MNT_COUNT 20
1030#define EXT4_DFL_CHECKINTERVAL 0
1031
1032
1033
1034
1035#define EXT4_ERRORS_CONTINUE 1
1036#define EXT4_ERRORS_RO 2
1037#define EXT4_ERRORS_PANIC 3
1038#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
1039
1040
1041#define EXT4_CRC32C_CHKSUM 1
1042
1043
1044
1045
1046struct ext4_super_block {
1047 __le32 s_inodes_count;
1048 __le32 s_blocks_count_lo;
1049 __le32 s_r_blocks_count_lo;
1050 __le32 s_free_blocks_count_lo;
1051 __le32 s_free_inodes_count;
1052 __le32 s_first_data_block;
1053 __le32 s_log_block_size;
1054 __le32 s_log_cluster_size;
1055 __le32 s_blocks_per_group;
1056 __le32 s_clusters_per_group;
1057 __le32 s_inodes_per_group;
1058 __le32 s_mtime;
1059 __le32 s_wtime;
1060 __le16 s_mnt_count;
1061 __le16 s_max_mnt_count;
1062 __le16 s_magic;
1063 __le16 s_state;
1064 __le16 s_errors;
1065 __le16 s_minor_rev_level;
1066 __le32 s_lastcheck;
1067 __le32 s_checkinterval;
1068 __le32 s_creator_os;
1069 __le32 s_rev_level;
1070 __le16 s_def_resuid;
1071 __le16 s_def_resgid;
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085 __le32 s_first_ino;
1086 __le16 s_inode_size;
1087 __le16 s_block_group_nr;
1088 __le32 s_feature_compat;
1089 __le32 s_feature_incompat;
1090 __le32 s_feature_ro_compat;
1091 __u8 s_uuid[16];
1092 char s_volume_name[16];
1093 char s_last_mounted[64];
1094 __le32 s_algorithm_usage_bitmap;
1095
1096
1097
1098
1099 __u8 s_prealloc_blocks;
1100 __u8 s_prealloc_dir_blocks;
1101 __le16 s_reserved_gdt_blocks;
1102
1103
1104
1105 __u8 s_journal_uuid[16];
1106 __le32 s_journal_inum;
1107 __le32 s_journal_dev;
1108 __le32 s_last_orphan;
1109 __le32 s_hash_seed[4];
1110 __u8 s_def_hash_version;
1111 __u8 s_jnl_backup_type;
1112 __le16 s_desc_size;
1113 __le32 s_default_mount_opts;
1114 __le32 s_first_meta_bg;
1115 __le32 s_mkfs_time;
1116 __le32 s_jnl_blocks[17];
1117
1118 __le32 s_blocks_count_hi;
1119 __le32 s_r_blocks_count_hi;
1120 __le32 s_free_blocks_count_hi;
1121 __le16 s_min_extra_isize;
1122 __le16 s_want_extra_isize;
1123 __le32 s_flags;
1124 __le16 s_raid_stride;
1125 __le16 s_mmp_update_interval;
1126 __le64 s_mmp_block;
1127 __le32 s_raid_stripe_width;
1128 __u8 s_log_groups_per_flex;
1129 __u8 s_checksum_type;
1130 __le16 s_reserved_pad;
1131 __le64 s_kbytes_written;
1132 __le32 s_snapshot_inum;
1133 __le32 s_snapshot_id;
1134 __le64 s_snapshot_r_blocks_count;
1135
1136 __le32 s_snapshot_list;
1137
1138#define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count)
1139 __le32 s_error_count;
1140 __le32 s_first_error_time;
1141 __le32 s_first_error_ino;
1142 __le64 s_first_error_block;
1143 __u8 s_first_error_func[32];
1144 __le32 s_first_error_line;
1145 __le32 s_last_error_time;
1146 __le32 s_last_error_ino;
1147 __le32 s_last_error_line;
1148 __le64 s_last_error_block;
1149 __u8 s_last_error_func[32];
1150#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
1151 __u8 s_mount_opts[64];
1152 __le32 s_usr_quota_inum;
1153 __le32 s_grp_quota_inum;
1154 __le32 s_overhead_clusters;
1155 __le32 s_reserved[108];
1156 __le32 s_checksum;
1157};
1158
1159#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
1160
1161#ifdef __KERNEL__
1162
1163
1164
1165
1166#define EXT4_MF_MNTDIR_SAMPLED 0x0001
1167#define EXT4_MF_FS_ABORTED 0x0002
1168
1169
1170
1171
1172struct ext4_sb_info {
1173 unsigned long s_desc_size;
1174 unsigned long s_inodes_per_block;
1175 unsigned long s_blocks_per_group;
1176 unsigned long s_clusters_per_group;
1177 unsigned long s_inodes_per_group;
1178 unsigned long s_itb_per_group;
1179 unsigned long s_gdb_count;
1180 unsigned long s_desc_per_block;
1181 ext4_group_t s_groups_count;
1182 ext4_group_t s_blockfile_groups;
1183 unsigned long s_overhead;
1184 unsigned int s_cluster_ratio;
1185 unsigned int s_cluster_bits;
1186 loff_t s_bitmap_maxbytes;
1187 struct buffer_head * s_sbh;
1188 struct ext4_super_block *s_es;
1189 struct buffer_head **s_group_desc;
1190 unsigned int s_mount_opt;
1191 unsigned int s_mount_opt2;
1192 unsigned int s_mount_flags;
1193 unsigned int s_def_mount_opt;
1194 ext4_fsblk_t s_sb_block;
1195 atomic64_t s_resv_clusters;
1196 kuid_t s_resuid;
1197 kgid_t s_resgid;
1198 unsigned short s_mount_state;
1199 unsigned short s_pad;
1200 int s_addr_per_block_bits;
1201 int s_desc_per_block_bits;
1202 int s_inode_size;
1203 int s_first_ino;
1204 unsigned int s_inode_readahead_blks;
1205 unsigned int s_inode_goal;
1206 spinlock_t s_next_gen_lock;
1207 u32 s_next_generation;
1208 u32 s_hash_seed[4];
1209 int s_def_hash_version;
1210 int s_hash_unsigned;
1211 struct percpu_counter s_freeclusters_counter;
1212 struct percpu_counter s_freeinodes_counter;
1213 struct percpu_counter s_dirs_counter;
1214 struct percpu_counter s_dirtyclusters_counter;
1215 struct blockgroup_lock *s_blockgroup_lock;
1216 struct proc_dir_entry *s_proc;
1217 struct kobject s_kobj;
1218 struct completion s_kobj_unregister;
1219 struct super_block *s_sb;
1220
1221
1222 struct journal_s *s_journal;
1223 struct list_head s_orphan;
1224 struct mutex s_orphan_lock;
1225 unsigned long s_resize_flags;
1226
1227 unsigned long s_commit_interval;
1228 u32 s_max_batch_time;
1229 u32 s_min_batch_time;
1230 struct block_device *journal_bdev;
1231#ifdef CONFIG_QUOTA
1232 char *s_qf_names[MAXQUOTAS];
1233 int s_jquota_fmt;
1234#endif
1235 unsigned int s_want_extra_isize;
1236 struct rb_root system_blks;
1237
1238#ifdef EXTENTS_STATS
1239
1240 unsigned long s_ext_min;
1241 unsigned long s_ext_max;
1242 unsigned long s_depth_max;
1243 spinlock_t s_ext_stats_lock;
1244 unsigned long s_ext_blocks;
1245 unsigned long s_ext_extents;
1246#endif
1247
1248
1249 struct ext4_group_info ***s_group_info;
1250 struct inode *s_buddy_cache;
1251 spinlock_t s_md_lock;
1252 unsigned short *s_mb_offsets;
1253 unsigned int *s_mb_maxs;
1254 unsigned int s_group_info_size;
1255
1256
1257 unsigned long s_stripe;
1258 unsigned int s_mb_stream_request;
1259 unsigned int s_mb_max_to_scan;
1260 unsigned int s_mb_min_to_scan;
1261 unsigned int s_mb_stats;
1262 unsigned int s_mb_order2_reqs;
1263 unsigned int s_mb_group_prealloc;
1264 unsigned int s_max_dir_size_kb;
1265
1266 unsigned long s_mb_last_group;
1267 unsigned long s_mb_last_start;
1268
1269
1270 atomic_t s_bal_reqs;
1271 atomic_t s_bal_success;
1272 atomic_t s_bal_allocated;
1273 atomic_t s_bal_ex_scanned;
1274 atomic_t s_bal_goals;
1275 atomic_t s_bal_breaks;
1276 atomic_t s_bal_2orders;
1277 spinlock_t s_bal_lock;
1278 unsigned long s_mb_buddies_generated;
1279 unsigned long long s_mb_generation_time;
1280 atomic_t s_mb_lost_chunks;
1281 atomic_t s_mb_preallocated;
1282 atomic_t s_mb_discarded;
1283 atomic_t s_lock_busy;
1284
1285
1286 struct ext4_locality_group __percpu *s_locality_groups;
1287
1288
1289 unsigned long s_sectors_written_start;
1290 u64 s_kbytes_written;
1291
1292
1293 unsigned int s_extent_max_zeroout_kb;
1294
1295 unsigned int s_log_groups_per_flex;
1296 struct flex_groups *s_flex_groups;
1297 ext4_group_t s_flex_groups_allocated;
1298
1299
1300 struct workqueue_struct *rsv_conversion_wq;
1301
1302
1303 struct timer_list s_err_report;
1304
1305
1306 struct ext4_li_request *s_li_request;
1307
1308 unsigned int s_li_wait_mult;
1309
1310
1311 struct task_struct *s_mmp_tsk;
1312
1313
1314 atomic_t s_last_trim_minblks;
1315
1316
1317 struct crypto_shash *s_chksum_driver;
1318
1319
1320 __u32 s_csum_seed;
1321
1322
1323 struct shrinker s_es_shrinker;
1324 struct list_head s_es_lru;
1325 unsigned long s_es_last_sorted;
1326 struct percpu_counter s_extent_cache_cnt;
1327 spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
1328
1329
1330 struct ratelimit_state s_err_ratelimit_state;
1331 struct ratelimit_state s_warning_ratelimit_state;
1332 struct ratelimit_state s_msg_ratelimit_state;
1333};
1334
1335static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
1336{
1337 return sb->s_fs_info;
1338}
1339static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
1340{
1341 return container_of(inode, struct ext4_inode_info, vfs_inode);
1342}
1343
1344static inline struct timespec ext4_current_time(struct inode *inode)
1345{
1346 return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
1347 current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
1348}
1349
1350static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
1351{
1352 return ino == EXT4_ROOT_INO ||
1353 ino == EXT4_USR_QUOTA_INO ||
1354 ino == EXT4_GRP_QUOTA_INO ||
1355 ino == EXT4_BOOT_LOADER_INO ||
1356 ino == EXT4_JOURNAL_INO ||
1357 ino == EXT4_RESIZE_INO ||
1358 (ino >= EXT4_FIRST_INO(sb) &&
1359 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
1360}
1361
1362static inline void ext4_set_io_unwritten_flag(struct inode *inode,
1363 struct ext4_io_end *io_end)
1364{
1365 if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
1366 io_end->flag |= EXT4_IO_END_UNWRITTEN;
1367 atomic_inc(&EXT4_I(inode)->i_unwritten);
1368 }
1369}
1370
1371static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode)
1372{
1373 return inode->i_private;
1374}
1375
1376static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io)
1377{
1378 inode->i_private = io;
1379}
1380
1381
1382
1383
1384enum {
1385 EXT4_STATE_JDATA,
1386 EXT4_STATE_NEW,
1387 EXT4_STATE_XATTR,
1388 EXT4_STATE_NO_EXPAND,
1389 EXT4_STATE_DA_ALLOC_CLOSE,
1390 EXT4_STATE_EXT_MIGRATE,
1391 EXT4_STATE_DIO_UNWRITTEN,
1392 EXT4_STATE_NEWENTRY,
1393 EXT4_STATE_DELALLOC_RESERVED,
1394 EXT4_STATE_DIOREAD_LOCK,
1395
1396 EXT4_STATE_MAY_INLINE_DATA,
1397 EXT4_STATE_ORDERED_MODE,
1398 EXT4_STATE_EXT_PRECACHED,
1399};
1400
1401#define EXT4_INODE_BIT_FNS(name, field, offset) \
1402static inline int ext4_test_inode_##name(struct inode *inode, int bit) \
1403{ \
1404 return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1405} \
1406static inline void ext4_set_inode_##name(struct inode *inode, int bit) \
1407{ \
1408 set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1409} \
1410static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
1411{ \
1412 clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \
1413}
1414
1415
1416
1417static inline int ext4_test_inode_flag(struct inode *inode, int bit);
1418static inline void ext4_set_inode_flag(struct inode *inode, int bit);
1419static inline void ext4_clear_inode_flag(struct inode *inode, int bit);
1420EXT4_INODE_BIT_FNS(flag, flags, 0)
1421
1422
1423
1424static inline int ext4_test_inode_state(struct inode *inode, int bit);
1425static inline void ext4_set_inode_state(struct inode *inode, int bit);
1426static inline void ext4_clear_inode_state(struct inode *inode, int bit);
1427#if (BITS_PER_LONG < 64)
1428EXT4_INODE_BIT_FNS(state, state_flags, 0)
1429
1430static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1431{
1432 (ei)->i_state_flags = 0;
1433}
1434#else
1435EXT4_INODE_BIT_FNS(state, flags, 32)
1436
1437static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
1438{
1439
1440}
1441#endif
1442#else
1443
1444
1445
1446#define EXT4_SB(sb) (sb)
1447#endif
1448
1449#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
1450
1451
1452
1453
1454#define EXT4_OS_LINUX 0
1455#define EXT4_OS_HURD 1
1456#define EXT4_OS_MASIX 2
1457#define EXT4_OS_FREEBSD 3
1458#define EXT4_OS_LITES 4
1459
1460
1461
1462
1463#define EXT4_GOOD_OLD_REV 0
1464#define EXT4_DYNAMIC_REV 1
1465
1466#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
1467#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
1468
1469#define EXT4_GOOD_OLD_INODE_SIZE 128
1470
1471
1472
1473
1474
1475#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
1476 ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
1477#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
1478 ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0)
1479#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \
1480 ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0)
1481#define EXT4_SET_COMPAT_FEATURE(sb,mask) \
1482 EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
1483#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \
1484 EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
1485#define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \
1486 EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
1487#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \
1488 EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
1489#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
1490 EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
1491#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \
1492 EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
1493
1494#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
1495#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
1496#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
1497#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
1498#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
1499#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
1500
1501#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
1502#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
1503#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
1504#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
1505#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1506#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
1507#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
1508#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
1509#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
1510
1511
1512
1513
1514
1515
1516#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
1517
1518#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
1519#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
1520#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
1521#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
1522#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
1523#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
1524#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
1525#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
1526#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
1527#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
1528#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
1529#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000
1530#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000
1531#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000
1532
1533#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1534#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1535 EXT4_FEATURE_INCOMPAT_META_BG)
1536#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1537 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1538 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1539
1540#define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
1541#define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1542 EXT4_FEATURE_INCOMPAT_RECOVER| \
1543 EXT4_FEATURE_INCOMPAT_META_BG)
1544#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1545 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1546 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
1547
1548#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
1549#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
1550 EXT4_FEATURE_INCOMPAT_RECOVER| \
1551 EXT4_FEATURE_INCOMPAT_META_BG| \
1552 EXT4_FEATURE_INCOMPAT_EXTENTS| \
1553 EXT4_FEATURE_INCOMPAT_64BIT| \
1554 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
1555 EXT4_FEATURE_INCOMPAT_MMP | \
1556 EXT4_FEATURE_INCOMPAT_INLINE_DATA)
1557#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
1558 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
1559 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
1560 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
1561 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
1562 EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
1563 EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
1564 EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
1565 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
1566 EXT4_FEATURE_RO_COMPAT_QUOTA)
1567
1568
1569
1570
1571#define EXT4_DEF_RESUID 0
1572#define EXT4_DEF_RESGID 0
1573
1574#define EXT4_DEF_INODE_READAHEAD_BLKS 32
1575
1576
1577
1578
1579#define EXT4_DEFM_DEBUG 0x0001
1580#define EXT4_DEFM_BSDGROUPS 0x0002
1581#define EXT4_DEFM_XATTR_USER 0x0004
1582#define EXT4_DEFM_ACL 0x0008
1583#define EXT4_DEFM_UID16 0x0010
1584#define EXT4_DEFM_JMODE 0x0060
1585#define EXT4_DEFM_JMODE_DATA 0x0020
1586#define EXT4_DEFM_JMODE_ORDERED 0x0040
1587#define EXT4_DEFM_JMODE_WBACK 0x0060
1588#define EXT4_DEFM_NOBARRIER 0x0100
1589#define EXT4_DEFM_BLOCK_VALIDITY 0x0200
1590#define EXT4_DEFM_DISCARD 0x0400
1591#define EXT4_DEFM_NODELALLOC 0x0800
1592
1593
1594
1595
1596#define EXT4_DEF_MIN_BATCH_TIME 0
1597#define EXT4_DEF_MAX_BATCH_TIME 15000
1598
1599
1600
1601
1602
1603#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
1604
1605
1606
1607
1608#define EXT4_NAME_LEN 255
1609
1610struct ext4_dir_entry {
1611 __le32 inode;
1612 __le16 rec_len;
1613 __le16 name_len;
1614 char name[EXT4_NAME_LEN];
1615};
1616
1617
1618
1619
1620
1621
1622
1623struct ext4_dir_entry_2 {
1624 __le32 inode;
1625 __le16 rec_len;
1626 __u8 name_len;
1627 __u8 file_type;
1628 char name[EXT4_NAME_LEN];
1629};
1630
1631
1632
1633
1634
1635struct ext4_dir_entry_tail {
1636 __le32 det_reserved_zero1;
1637 __le16 det_rec_len;
1638 __u8 det_reserved_zero2;
1639 __u8 det_reserved_ft;
1640 __le32 det_checksum;
1641};
1642
1643#define EXT4_DIRENT_TAIL(block, blocksize) \
1644 ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
1645 ((blocksize) - \
1646 sizeof(struct ext4_dir_entry_tail))))
1647
1648
1649
1650
1651
1652#define EXT4_FT_UNKNOWN 0
1653#define EXT4_FT_REG_FILE 1
1654#define EXT4_FT_DIR 2
1655#define EXT4_FT_CHRDEV 3
1656#define EXT4_FT_BLKDEV 4
1657#define EXT4_FT_FIFO 5
1658#define EXT4_FT_SOCK 6
1659#define EXT4_FT_SYMLINK 7
1660
1661#define EXT4_FT_MAX 8
1662
1663#define EXT4_FT_DIR_CSUM 0xDE
1664
1665
1666
1667
1668
1669
1670#define EXT4_DIR_PAD 4
1671#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
1672#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
1673 ~EXT4_DIR_ROUND)
1674#define EXT4_MAX_REC_LEN ((1<<16)-1)
1675
1676
1677
1678
1679
1680static inline unsigned int
1681ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
1682{
1683 unsigned len = le16_to_cpu(dlen);
1684
1685#if (PAGE_CACHE_SIZE >= 65536)
1686 if (len == EXT4_MAX_REC_LEN || len == 0)
1687 return blocksize;
1688 return (len & 65532) | ((len & 3) << 16);
1689#else
1690 return len;
1691#endif
1692}
1693
1694static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
1695{
1696 if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
1697 BUG();
1698#if (PAGE_CACHE_SIZE >= 65536)
1699 if (len < 65536)
1700 return cpu_to_le16(len);
1701 if (len == blocksize) {
1702 if (blocksize == 65536)
1703 return cpu_to_le16(EXT4_MAX_REC_LEN);
1704 else
1705 return cpu_to_le16(0);
1706 }
1707 return cpu_to_le16((len & 65532) | ((len >> 16) & 3));
1708#else
1709 return cpu_to_le16(len);
1710#endif
1711}
1712
1713
1714
1715
1716
1717
1718#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
1719 EXT4_FEATURE_COMPAT_DIR_INDEX) && \
1720 ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
1721#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
1722#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
1723
1724
1725
1726#define DX_HASH_LEGACY 0
1727#define DX_HASH_HALF_MD4 1
1728#define DX_HASH_TEA 2
1729#define DX_HASH_LEGACY_UNSIGNED 3
1730#define DX_HASH_HALF_MD4_UNSIGNED 4
1731#define DX_HASH_TEA_UNSIGNED 5
1732
1733static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc,
1734 const void *address, unsigned int length)
1735{
1736 struct {
1737 struct shash_desc shash;
1738 char ctx[4];
1739 } desc;
1740 int err;
1741
1742 BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx));
1743
1744 desc.shash.tfm = sbi->s_chksum_driver;
1745 desc.shash.flags = 0;
1746 *(u32 *)desc.ctx = crc;
1747
1748 err = crypto_shash_update(&desc.shash, address, length);
1749 BUG_ON(err);
1750
1751 return *(u32 *)desc.ctx;
1752}
1753
1754#ifdef __KERNEL__
1755
1756
1757struct dx_hash_info
1758{
1759 u32 hash;
1760 u32 minor_hash;
1761 int hash_version;
1762 u32 *seed;
1763};
1764
1765
1766
1767#define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1)
1768#define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1)
1769
1770
1771
1772
1773
1774#define HASH_NB_ALWAYS 1
1775
1776
1777
1778
1779
1780struct ext4_iloc
1781{
1782 struct buffer_head *bh;
1783 unsigned long offset;
1784 ext4_group_t block_group;
1785};
1786
1787static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
1788{
1789 return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
1790}
1791
1792
1793
1794
1795
1796
1797struct dir_private_info {
1798 struct rb_root root;
1799 struct rb_node *curr_node;
1800 struct fname *extra_fname;
1801 loff_t last_pos;
1802 __u32 curr_hash;
1803 __u32 curr_minor_hash;
1804 __u32 next_hash;
1805};
1806
1807
1808static inline ext4_fsblk_t
1809ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
1810{
1811 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
1812 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
1813}
1814
1815
1816
1817
1818#define ERR_BAD_DX_DIR -75000
1819
1820
1821
1822
1823#define EXT4_DEF_LI_WAIT_MULT 10
1824#define EXT4_DEF_LI_MAX_START_DELAY 5
1825#define EXT4_LAZYINIT_QUIT 0x0001
1826#define EXT4_LAZYINIT_RUNNING 0x0002
1827
1828
1829
1830
1831struct ext4_lazy_init {
1832 unsigned long li_state;
1833 struct list_head li_request_list;
1834 struct mutex li_list_mtx;
1835};
1836
1837struct ext4_li_request {
1838 struct super_block *lr_super;
1839 struct ext4_sb_info *lr_sbi;
1840 ext4_group_t lr_next_group;
1841 struct list_head lr_request;
1842 unsigned long lr_next_sched;
1843 unsigned long lr_timeout;
1844};
1845
1846struct ext4_features {
1847 struct kobject f_kobj;
1848 struct completion f_kobj_unregister;
1849};
1850
1851
1852
1853
1854
1855
1856
1857
1858#define EXT4_MMP_MAGIC 0x004D4D50U
1859#define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U
1860#define EXT4_MMP_SEQ_FSCK 0xE24D4D50U
1861#define EXT4_MMP_SEQ_MAX 0xE24D4D4FU
1862
1863struct mmp_struct {
1864 __le32 mmp_magic;
1865 __le32 mmp_seq;
1866
1867
1868
1869
1870
1871 __le64 mmp_time;
1872 char mmp_nodename[64];
1873 char mmp_bdevname[32];
1874
1875
1876
1877
1878
1879
1880 __le16 mmp_check_interval;
1881
1882 __le16 mmp_pad1;
1883 __le32 mmp_pad2[226];
1884 __le32 mmp_checksum;
1885};
1886
1887
1888struct mmpd_data {
1889 struct buffer_head *bh;
1890 struct super_block *sb;
1891};
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901#define EXT4_MMP_CHECK_MULT 2UL
1902
1903
1904
1905
1906#define EXT4_MMP_MIN_CHECK_INTERVAL 5UL
1907
1908
1909
1910
1911#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921# define NORET_TYPE
1922# define ATTRIB_NORET __attribute__((noreturn))
1923# define NORET_AND noreturn,
1924
1925
1926extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
1927void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
1928 struct ext4_group_desc *gdp,
1929 struct buffer_head *bh, int sz);
1930int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
1931 struct ext4_group_desc *gdp,
1932 struct buffer_head *bh, int sz);
1933void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
1934 struct ext4_group_desc *gdp,
1935 struct buffer_head *bh);
1936int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
1937 struct ext4_group_desc *gdp,
1938 struct buffer_head *bh);
1939
1940
1941extern void ext4_get_group_no_and_offset(struct super_block *sb,
1942 ext4_fsblk_t blocknr,
1943 ext4_group_t *blockgrpp,
1944 ext4_grpblk_t *offsetp);
1945extern ext4_group_t ext4_get_group_number(struct super_block *sb,
1946 ext4_fsblk_t block);
1947
1948extern void ext4_validate_block_bitmap(struct super_block *sb,
1949 struct ext4_group_desc *desc,
1950 ext4_group_t block_group,
1951 struct buffer_head *bh);
1952extern unsigned int ext4_block_group(struct super_block *sb,
1953 ext4_fsblk_t blocknr);
1954extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
1955 ext4_fsblk_t blocknr);
1956extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
1957extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
1958 ext4_group_t group);
1959extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
1960 ext4_fsblk_t goal,
1961 unsigned int flags,
1962 unsigned long *count,
1963 int *errp);
1964extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
1965 s64 nclusters, unsigned int flags);
1966extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *);
1967extern void ext4_check_blocks_bitmap(struct super_block *);
1968extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
1969 ext4_group_t block_group,
1970 struct buffer_head ** bh);
1971extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
1972
1973extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb,
1974 ext4_group_t block_group);
1975extern int ext4_wait_block_bitmap(struct super_block *sb,
1976 ext4_group_t block_group,
1977 struct buffer_head *bh);
1978extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
1979 ext4_group_t block_group);
1980extern void ext4_init_block_bitmap(struct super_block *sb,
1981 struct buffer_head *bh,
1982 ext4_group_t group,
1983 struct ext4_group_desc *desc);
1984extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
1985 ext4_group_t block_group,
1986 struct ext4_group_desc *gdp);
1987extern unsigned ext4_num_overhead_clusters(struct super_block *sb,
1988 ext4_group_t block_group,
1989 struct ext4_group_desc *gdp);
1990ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
1991
1992
1993extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
1994 struct file *,
1995 struct ext4_dir_entry_2 *,
1996 struct buffer_head *, char *, int,
1997 unsigned int);
1998#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \
1999 unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
2000 (de), (bh), (buf), (size), (offset)))
2001extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
2002 __u32 minor_hash,
2003 struct ext4_dir_entry_2 *dirent);
2004extern void ext4_htree_free_dir_info(struct dir_private_info *p);
2005extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
2006 struct buffer_head *bh,
2007 void *buf, int buf_size,
2008 const char *name, int namelen,
2009 struct ext4_dir_entry_2 **dest_de);
2010void ext4_insert_dentry(struct inode *inode,
2011 struct ext4_dir_entry_2 *de,
2012 int buf_size,
2013 const char *name, int namelen);
2014static inline void ext4_update_dx_flag(struct inode *inode)
2015{
2016 if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
2017 EXT4_FEATURE_COMPAT_DIR_INDEX))
2018 ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
2019}
2020static unsigned char ext4_filetype_table[] = {
2021 DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
2022};
2023
2024static inline unsigned char get_dtype(struct super_block *sb, int filetype)
2025{
2026 if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
2027 (filetype >= EXT4_FT_MAX))
2028 return DT_UNKNOWN;
2029
2030 return ext4_filetype_table[filetype];
2031}
2032
2033
2034extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
2035
2036
2037extern int ext4fs_dirhash(const char *name, int len, struct
2038 dx_hash_info *hinfo);
2039
2040
2041extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
2042 const struct qstr *qstr, __u32 goal,
2043 uid_t *owner, int handle_type,
2044 unsigned int line_no, int nblocks);
2045
2046#define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \
2047 __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \
2048 0, 0, 0)
2049#define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \
2050 type, nblocks) \
2051 __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \
2052 (type), __LINE__, (nblocks))
2053
2054
2055extern void ext4_free_inode(handle_t *, struct inode *);
2056extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
2057extern unsigned long ext4_count_free_inodes(struct super_block *);
2058extern unsigned long ext4_count_dirs(struct super_block *);
2059extern void ext4_check_inodes_bitmap(struct super_block *);
2060extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
2061extern int ext4_init_inode_table(struct super_block *sb,
2062 ext4_group_t group, int barrier);
2063extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
2064
2065
2066extern long ext4_mb_stats;
2067extern long ext4_mb_max_to_scan;
2068extern int ext4_mb_init(struct super_block *);
2069extern int ext4_mb_release(struct super_block *);
2070extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
2071 struct ext4_allocation_request *, int *);
2072extern int ext4_mb_reserve_blocks(struct super_block *, int);
2073extern void ext4_discard_preallocations(struct inode *);
2074extern int __init ext4_init_mballoc(void);
2075extern void ext4_exit_mballoc(void);
2076extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
2077 struct buffer_head *bh, ext4_fsblk_t block,
2078 unsigned long count, int flags);
2079extern int ext4_mb_alloc_groupinfo(struct super_block *sb,
2080 ext4_group_t ngroups);
2081extern int ext4_mb_add_groupinfo(struct super_block *sb,
2082 ext4_group_t i, struct ext4_group_desc *desc);
2083extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
2084 ext4_fsblk_t block, unsigned long count);
2085extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
2086
2087
2088struct buffer_head *ext4_getblk(handle_t *, struct inode *,
2089 ext4_lblk_t, int, int *);
2090struct buffer_head *ext4_bread(handle_t *, struct inode *,
2091 ext4_lblk_t, int, int *);
2092int ext4_get_block_write(struct inode *inode, sector_t iblock,
2093 struct buffer_head *bh_result, int create);
2094int ext4_get_block(struct inode *inode, sector_t iblock,
2095 struct buffer_head *bh_result, int create);
2096int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
2097 struct buffer_head *bh, int create);
2098int ext4_walk_page_buffers(handle_t *handle,
2099 struct buffer_head *head,
2100 unsigned from,
2101 unsigned to,
2102 int *partial,
2103 int (*fn)(handle_t *handle,
2104 struct buffer_head *bh));
2105int do_journal_get_write_access(handle_t *handle,
2106 struct buffer_head *bh);
2107#define FALL_BACK_TO_NONDELALLOC 1
2108#define CONVERT_INLINE_DATA 2
2109
2110extern struct inode *ext4_iget(struct super_block *, unsigned long);
2111extern int ext4_write_inode(struct inode *, struct writeback_control *);
2112extern int ext4_setattr(struct dentry *, struct iattr *);
2113extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
2114 struct kstat *stat);
2115extern void ext4_evict_inode(struct inode *);
2116extern void ext4_clear_inode(struct inode *);
2117extern int ext4_sync_inode(handle_t *, struct inode *);
2118extern void ext4_dirty_inode(struct inode *, int);
2119extern int ext4_change_inode_journal_flag(struct inode *, int);
2120extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
2121extern int ext4_inode_attach_jinode(struct inode *inode);
2122extern int ext4_can_truncate(struct inode *inode);
2123extern void ext4_truncate(struct inode *);
2124extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length);
2125extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks);
2126extern void ext4_set_inode_flags(struct inode *);
2127extern void ext4_get_inode_flags(struct ext4_inode_info *);
2128extern int ext4_alloc_da_blocks(struct inode *inode);
2129extern void ext4_set_aops(struct inode *inode);
2130extern int ext4_writepage_trans_blocks(struct inode *);
2131extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
2132extern int ext4_block_truncate_page(handle_t *handle,
2133 struct address_space *mapping, loff_t from);
2134extern int ext4_block_zero_page_range(handle_t *handle,
2135 struct address_space *mapping, loff_t from, loff_t length);
2136extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
2137 loff_t lstart, loff_t lend);
2138extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
2139extern qsize_t *ext4_get_reserved_space(struct inode *inode);
2140extern void ext4_da_update_reserve_space(struct inode *inode,
2141 int used, int quota_claim);
2142
2143
2144extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
2145 struct ext4_map_blocks *map, int flags);
2146extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
2147 const struct iovec *iov, loff_t offset,
2148 unsigned long nr_segs);
2149extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
2150extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
2151extern void ext4_ind_truncate(handle_t *, struct inode *inode);
2152extern int ext4_free_hole_blocks(handle_t *handle, struct inode *inode,
2153 ext4_lblk_t first, ext4_lblk_t stop);
2154
2155
2156extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
2157extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
2158
2159
2160extern int ext4_ext_migrate(struct inode *);
2161extern int ext4_ind_migrate(struct inode *inode);
2162
2163
2164extern int ext4_dirent_csum_verify(struct inode *inode,
2165 struct ext4_dir_entry *dirent);
2166extern int ext4_orphan_add(handle_t *, struct inode *);
2167extern int ext4_orphan_del(handle_t *, struct inode *);
2168extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
2169 __u32 start_minor_hash, __u32 *next_hash);
2170extern int search_dir(struct buffer_head *bh,
2171 char *search_buf,
2172 int buf_size,
2173 struct inode *dir,
2174 const struct qstr *d_name,
2175 unsigned int offset,
2176 struct ext4_dir_entry_2 **res_dir);
2177extern int ext4_generic_delete_entry(handle_t *handle,
2178 struct inode *dir,
2179 struct ext4_dir_entry_2 *de_del,
2180 struct buffer_head *bh,
2181 void *entry_buf,
2182 int buf_size,
2183 int csum_size);
2184
2185
2186extern int ext4_group_add(struct super_block *sb,
2187 struct ext4_new_group_data *input);
2188extern int ext4_group_extend(struct super_block *sb,
2189 struct ext4_super_block *es,
2190 ext4_fsblk_t n_blocks_count);
2191extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
2192
2193
2194extern int ext4_calculate_overhead(struct super_block *sb);
2195extern int ext4_superblock_csum_verify(struct super_block *sb,
2196 struct ext4_super_block *es);
2197extern void ext4_superblock_csum_set(struct super_block *sb);
2198extern void *ext4_kvmalloc(size_t size, gfp_t flags);
2199extern void *ext4_kvzalloc(size_t size, gfp_t flags);
2200extern void ext4_kvfree(void *ptr);
2201extern int ext4_alloc_flex_bg_array(struct super_block *sb,
2202 ext4_group_t ngroup);
2203extern const char *ext4_decode_error(struct super_block *sb, int errno,
2204 char nbuf[16]);
2205
2206extern __printf(4, 5)
2207void __ext4_error(struct super_block *, const char *, unsigned int,
2208 const char *, ...);
2209extern __printf(5, 6)
2210void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t,
2211 const char *, ...);
2212extern __printf(5, 6)
2213void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t,
2214 const char *, ...);
2215extern void __ext4_std_error(struct super_block *, const char *,
2216 unsigned int, int);
2217extern __printf(4, 5)
2218void __ext4_abort(struct super_block *, const char *, unsigned int,
2219 const char *, ...);
2220extern __printf(4, 5)
2221void __ext4_warning(struct super_block *, const char *, unsigned int,
2222 const char *, ...);
2223extern __printf(3, 4)
2224void __ext4_msg(struct super_block *, const char *, const char *, ...);
2225extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
2226 const char *, unsigned int, const char *);
2227extern __printf(7, 8)
2228void __ext4_grp_locked_error(const char *, unsigned int,
2229 struct super_block *, ext4_group_t,
2230 unsigned long, ext4_fsblk_t,
2231 const char *, ...);
2232
2233#ifdef CONFIG_PRINTK
2234
2235#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2236 __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__)
2237#define ext4_error_file(file, func, line, block, fmt, ...) \
2238 __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__)
2239#define ext4_error(sb, fmt, ...) \
2240 __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2241#define ext4_abort(sb, fmt, ...) \
2242 __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2243#define ext4_warning(sb, fmt, ...) \
2244 __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__)
2245#define ext4_msg(sb, level, fmt, ...) \
2246 __ext4_msg(sb, level, fmt, ##__VA_ARGS__)
2247#define dump_mmp_msg(sb, mmp, msg) \
2248 __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg)
2249#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2250 __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \
2251 fmt, ##__VA_ARGS__)
2252
2253#else
2254
2255#define ext4_error_inode(inode, func, line, block, fmt, ...) \
2256do { \
2257 no_printk(fmt, ##__VA_ARGS__); \
2258 __ext4_error_inode(inode, "", 0, block, " "); \
2259} while (0)
2260#define ext4_error_file(file, func, line, block, fmt, ...) \
2261do { \
2262 no_printk(fmt, ##__VA_ARGS__); \
2263 __ext4_error_file(file, "", 0, block, " "); \
2264} while (0)
2265#define ext4_error(sb, fmt, ...) \
2266do { \
2267 no_printk(fmt, ##__VA_ARGS__); \
2268 __ext4_error(sb, "", 0, " "); \
2269} while (0)
2270#define ext4_abort(sb, fmt, ...) \
2271do { \
2272 no_printk(fmt, ##__VA_ARGS__); \
2273 __ext4_abort(sb, "", 0, " "); \
2274} while (0)
2275#define ext4_warning(sb, fmt, ...) \
2276do { \
2277 no_printk(fmt, ##__VA_ARGS__); \
2278 __ext4_warning(sb, "", 0, " "); \
2279} while (0)
2280#define ext4_msg(sb, level, fmt, ...) \
2281do { \
2282 no_printk(fmt, ##__VA_ARGS__); \
2283 __ext4_msg(sb, "", " "); \
2284} while (0)
2285#define dump_mmp_msg(sb, mmp, msg) \
2286 __dump_mmp_msg(sb, mmp, "", 0, "")
2287#define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \
2288do { \
2289 no_printk(fmt, ##__VA_ARGS__); \
2290 __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \
2291} while (0)
2292
2293#endif
2294
2295extern void ext4_update_dynamic_rev(struct super_block *sb);
2296extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
2297 __u32 compat);
2298extern int ext4_update_rocompat_feature(handle_t *handle,
2299 struct super_block *sb, __u32 rocompat);
2300extern int ext4_update_incompat_feature(handle_t *handle,
2301 struct super_block *sb, __u32 incompat);
2302extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
2303 struct ext4_group_desc *bg);
2304extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
2305 struct ext4_group_desc *bg);
2306extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
2307 struct ext4_group_desc *bg);
2308extern __u32 ext4_free_group_clusters(struct super_block *sb,
2309 struct ext4_group_desc *bg);
2310extern __u32 ext4_free_inodes_count(struct super_block *sb,
2311 struct ext4_group_desc *bg);
2312extern __u32 ext4_used_dirs_count(struct super_block *sb,
2313 struct ext4_group_desc *bg);
2314extern __u32 ext4_itable_unused_count(struct super_block *sb,
2315 struct ext4_group_desc *bg);
2316extern void ext4_block_bitmap_set(struct super_block *sb,
2317 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2318extern void ext4_inode_bitmap_set(struct super_block *sb,
2319 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2320extern void ext4_inode_table_set(struct super_block *sb,
2321 struct ext4_group_desc *bg, ext4_fsblk_t blk);
2322extern void ext4_free_group_clusters_set(struct super_block *sb,
2323 struct ext4_group_desc *bg,
2324 __u32 count);
2325extern void ext4_free_inodes_set(struct super_block *sb,
2326 struct ext4_group_desc *bg, __u32 count);
2327extern void ext4_used_dirs_set(struct super_block *sb,
2328 struct ext4_group_desc *bg, __u32 count);
2329extern void ext4_itable_unused_set(struct super_block *sb,
2330 struct ext4_group_desc *bg, __u32 count);
2331extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
2332 struct ext4_group_desc *gdp);
2333extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group,
2334 struct ext4_group_desc *gdp);
2335extern int ext4_register_li_request(struct super_block *sb,
2336 ext4_group_t first_not_zeroed);
2337
2338static inline int ext4_has_group_desc_csum(struct super_block *sb)
2339{
2340 return EXT4_HAS_RO_COMPAT_FEATURE(sb,
2341 EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
2342 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
2343}
2344
2345static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
2346{
2347 return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
2348 le32_to_cpu(es->s_blocks_count_lo);
2349}
2350
2351static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
2352{
2353 return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
2354 le32_to_cpu(es->s_r_blocks_count_lo);
2355}
2356
2357static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
2358{
2359 return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
2360 le32_to_cpu(es->s_free_blocks_count_lo);
2361}
2362
2363static inline void ext4_blocks_count_set(struct ext4_super_block *es,
2364 ext4_fsblk_t blk)
2365{
2366 es->s_blocks_count_lo = cpu_to_le32((u32)blk);
2367 es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
2368}
2369
2370static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
2371 ext4_fsblk_t blk)
2372{
2373 es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
2374 es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
2375}
2376
2377static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
2378 ext4_fsblk_t blk)
2379{
2380 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
2381 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
2382}
2383
2384static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
2385{
2386 if (S_ISREG(le16_to_cpu(raw_inode->i_mode)))
2387 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
2388 le32_to_cpu(raw_inode->i_size_lo);
2389 else
2390 return (loff_t) le32_to_cpu(raw_inode->i_size_lo);
2391}
2392
2393static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
2394{
2395 raw_inode->i_size_lo = cpu_to_le32(i_size);
2396 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
2397}
2398
2399static inline
2400struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
2401 ext4_group_t group)
2402{
2403 struct ext4_group_info ***grp_info;
2404 long indexv, indexh;
2405 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
2406 grp_info = EXT4_SB(sb)->s_group_info;
2407 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
2408 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
2409 return grp_info[indexv][indexh];
2410}
2411
2412
2413
2414
2415
2416
2417static inline ext4_group_t ext4_get_groups_count(struct super_block *sb)
2418{
2419 ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
2420
2421 smp_rmb();
2422 return ngroups;
2423}
2424
2425static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi,
2426 ext4_group_t block_group)
2427{
2428 return block_group >> sbi->s_log_groups_per_flex;
2429}
2430
2431static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi)
2432{
2433 return 1 << sbi->s_log_groups_per_flex;
2434}
2435
2436#define ext4_std_error(sb, errno) \
2437do { \
2438 if ((errno)) \
2439 __ext4_std_error((sb), __func__, __LINE__, (errno)); \
2440} while (0)
2441
2442#ifdef CONFIG_SMP
2443
2444
2445
2446
2447#define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
2448#else
2449#define EXT4_FREECLUSTERS_WATERMARK 0
2450#endif
2451
2452
2453static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
2454{
2455 WARN_ON_ONCE(S_ISREG(inode->i_mode) &&
2456 !mutex_is_locked(&inode->i_mutex));
2457 down_write(&EXT4_I(inode)->i_data_sem);
2458 if (newsize > EXT4_I(inode)->i_disksize)
2459 EXT4_I(inode)->i_disksize = newsize;
2460 up_write(&EXT4_I(inode)->i_data_sem);
2461}
2462
2463
2464
2465
2466
2467static inline void ext4_wb_update_i_disksize(struct inode *inode, loff_t newsize)
2468{
2469 loff_t i_size;
2470
2471 down_write(&EXT4_I(inode)->i_data_sem);
2472 i_size = i_size_read(inode);
2473 if (newsize > i_size)
2474 newsize = i_size;
2475 if (newsize > EXT4_I(inode)->i_disksize)
2476 EXT4_I(inode)->i_disksize = newsize;
2477 up_write(&EXT4_I(inode)->i_data_sem);
2478}
2479
2480struct ext4_group_info {
2481 unsigned long bb_state;
2482 struct rb_root bb_free_root;
2483 ext4_grpblk_t bb_first_free;
2484 ext4_grpblk_t bb_free;
2485 ext4_grpblk_t bb_fragments;
2486 ext4_grpblk_t bb_largest_free_order;
2487 struct list_head bb_prealloc_list;
2488#ifdef DOUBLE_CHECK
2489 void *bb_bitmap;
2490#endif
2491 struct rw_semaphore alloc_sem;
2492 ext4_grpblk_t bb_counters[];
2493
2494
2495
2496};
2497
2498#define EXT4_GROUP_INFO_NEED_INIT_BIT 0
2499#define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1
2500#define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2
2501#define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3
2502
2503#define EXT4_MB_GRP_NEED_INIT(grp) \
2504 (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
2505#define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \
2506 (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
2507#define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \
2508 (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state)))
2509
2510#define EXT4_MB_GRP_WAS_TRIMMED(grp) \
2511 (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2512#define EXT4_MB_GRP_SET_TRIMMED(grp) \
2513 (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2514#define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \
2515 (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
2516
2517#define EXT4_MAX_CONTENTION 8
2518#define EXT4_CONTENTION_THRESHOLD 2
2519
2520static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb,
2521 ext4_group_t group)
2522{
2523 return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group);
2524}
2525
2526
2527
2528
2529
2530static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi)
2531{
2532 return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD);
2533}
2534
2535static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group)
2536{
2537 spinlock_t *lock = ext4_group_lock_ptr(sb, group);
2538 if (spin_trylock(lock))
2539
2540
2541
2542
2543 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0);
2544 else {
2545
2546
2547
2548
2549 atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1,
2550 EXT4_MAX_CONTENTION);
2551 spin_lock(lock);
2552 }
2553}
2554
2555static inline void ext4_unlock_group(struct super_block *sb,
2556 ext4_group_t group)
2557{
2558 spin_unlock(ext4_group_lock_ptr(sb, group));
2559}
2560
2561
2562
2563
2564#define ext4_check_indirect_blockref(inode, bh) \
2565 ext4_check_blockref(__func__, __LINE__, inode, \
2566 (__le32 *)(bh)->b_data, \
2567 EXT4_ADDR_PER_BLOCK((inode)->i_sb))
2568
2569#define ext4_ind_check_inode(inode) \
2570 ext4_check_blockref(__func__, __LINE__, inode, \
2571 EXT4_I(inode)->i_data, \
2572 EXT4_NDIR_BLOCKS)
2573
2574
2575
2576
2577
2578
2579extern const struct file_operations ext4_dir_operations;
2580
2581
2582extern const struct inode_operations ext4_file_inode_operations;
2583extern const struct file_operations ext4_file_operations;
2584extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
2585extern void ext4_unwritten_wait(struct inode *inode);
2586
2587
2588extern int ext4_has_inline_data(struct inode *inode);
2589extern int ext4_get_inline_size(struct inode *inode);
2590extern int ext4_get_max_inline_size(struct inode *inode);
2591extern int ext4_find_inline_data_nolock(struct inode *inode);
2592extern void ext4_write_inline_data(struct inode *inode,
2593 struct ext4_iloc *iloc,
2594 void *buffer, loff_t pos,
2595 unsigned int len);
2596extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
2597 unsigned int len);
2598extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
2599 unsigned int len);
2600extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
2601
2602extern int ext4_readpage_inline(struct inode *inode, struct page *page);
2603extern int ext4_try_to_write_inline_data(struct address_space *mapping,
2604 struct inode *inode,
2605 loff_t pos, unsigned len,
2606 unsigned flags,
2607 struct page **pagep);
2608extern int ext4_write_inline_data_end(struct inode *inode,
2609 loff_t pos, unsigned len,
2610 unsigned copied,
2611 struct page *page);
2612extern struct buffer_head *
2613ext4_journalled_write_inline_data(struct inode *inode,
2614 unsigned len,
2615 struct page *page);
2616extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
2617 struct inode *inode,
2618 loff_t pos, unsigned len,
2619 unsigned flags,
2620 struct page **pagep,
2621 void **fsdata);
2622extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
2623 unsigned len, unsigned copied,
2624 struct page *page);
2625extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
2626 struct inode *inode);
2627extern int ext4_try_create_inline_dir(handle_t *handle,
2628 struct inode *parent,
2629 struct inode *inode);
2630extern int ext4_read_inline_dir(struct file *filp,
2631 struct dir_context *ctx,
2632 int *has_inline_data);
2633extern int htree_inlinedir_to_tree(struct file *dir_file,
2634 struct inode *dir, ext4_lblk_t block,
2635 struct dx_hash_info *hinfo,
2636 __u32 start_hash, __u32 start_minor_hash,
2637 int *has_inline_data);
2638extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
2639 const struct qstr *d_name,
2640 struct ext4_dir_entry_2 **res_dir,
2641 int *has_inline_data);
2642extern int ext4_delete_inline_entry(handle_t *handle,
2643 struct inode *dir,
2644 struct ext4_dir_entry_2 *de_del,
2645 struct buffer_head *bh,
2646 int *has_inline_data);
2647extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
2648extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
2649 struct ext4_dir_entry_2 **parent_de,
2650 int *retval);
2651extern int ext4_inline_data_fiemap(struct inode *inode,
2652 struct fiemap_extent_info *fieinfo,
2653 int *has_inline);
2654extern int ext4_try_to_evict_inline_data(handle_t *handle,
2655 struct inode *inode,
2656 int needed);
2657extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
2658
2659extern int ext4_convert_inline_data(struct inode *inode);
2660
2661
2662extern const struct inode_operations ext4_dir_inode_operations;
2663extern const struct inode_operations ext4_special_inode_operations;
2664extern struct dentry *ext4_get_parent(struct dentry *child);
2665extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
2666 struct ext4_dir_entry_2 *de,
2667 int blocksize, int csum_size,
2668 unsigned int parent_ino, int dotdot_real_len);
2669extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
2670 unsigned int blocksize);
2671extern int ext4_handle_dirty_dirent_node(handle_t *handle,
2672 struct inode *inode,
2673 struct buffer_head *bh);
2674#define S_SHIFT 12
2675static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = {
2676 [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
2677 [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
2678 [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
2679 [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
2680 [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
2681 [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
2682 [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
2683};
2684
2685static inline void ext4_set_de_type(struct super_block *sb,
2686 struct ext4_dir_entry_2 *de,
2687 umode_t mode) {
2688 if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE))
2689 de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
2690}
2691
2692
2693
2694extern const struct inode_operations ext4_symlink_inode_operations;
2695extern const struct inode_operations ext4_fast_symlink_inode_operations;
2696
2697
2698extern void ext4_release_system_zone(struct super_block *sb);
2699extern int ext4_setup_system_zone(struct super_block *sb);
2700extern int __init ext4_init_system_zone(void);
2701extern void ext4_exit_system_zone(void);
2702extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
2703 ext4_fsblk_t start_blk,
2704 unsigned int count);
2705extern int ext4_check_blockref(const char *, unsigned int,
2706 struct inode *, __le32 *, unsigned int);
2707
2708
2709struct ext4_ext_path;
2710struct ext4_extent;
2711
2712
2713
2714
2715
2716#define EXT_MAX_BLOCKS 0xffffffff
2717
2718extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
2719extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
2720extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
2721extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
2722 struct ext4_map_blocks *map, int flags);
2723extern void ext4_ext_truncate(handle_t *, struct inode *);
2724extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
2725 ext4_lblk_t end);
2726extern void ext4_ext_init(struct super_block *);
2727extern void ext4_ext_release(struct super_block *);
2728extern long ext4_fallocate(struct file *file, int mode, loff_t offset,
2729 loff_t len);
2730extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode,
2731 loff_t offset, ssize_t len);
2732extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
2733 struct ext4_map_blocks *map, int flags);
2734extern int ext4_ext_calc_metadata_amount(struct inode *inode,
2735 ext4_lblk_t lblocks);
2736extern int ext4_extent_tree_init(handle_t *, struct inode *);
2737extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
2738 int num,
2739 struct ext4_ext_path *path);
2740extern int ext4_can_extents_be_merged(struct inode *inode,
2741 struct ext4_extent *ex1,
2742 struct ext4_extent *ex2);
2743extern int ext4_ext_insert_extent(handle_t *, struct inode *,
2744 struct ext4_ext_path *,
2745 struct ext4_extent *, int);
2746extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
2747 struct ext4_ext_path *,
2748 int flags);
2749extern void ext4_ext_drop_refs(struct ext4_ext_path *);
2750extern int ext4_ext_check_inode(struct inode *inode);
2751extern int ext4_find_delalloc_range(struct inode *inode,
2752 ext4_lblk_t lblk_start,
2753 ext4_lblk_t lblk_end);
2754extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
2755extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2756 __u64 start, __u64 len);
2757extern int ext4_ext_precache(struct inode *inode);
2758
2759
2760extern void ext4_double_down_write_data_sem(struct inode *first,
2761 struct inode *second);
2762extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
2763 struct inode *donor_inode);
2764extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
2765 __u64 start_orig, __u64 start_donor,
2766 __u64 len, __u64 *moved_len);
2767
2768
2769extern int __init ext4_init_pageio(void);
2770extern void ext4_exit_pageio(void);
2771extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
2772extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end);
2773extern int ext4_put_io_end(ext4_io_end_t *io_end);
2774extern void ext4_put_io_end_defer(ext4_io_end_t *io_end);
2775extern void ext4_io_submit_init(struct ext4_io_submit *io,
2776 struct writeback_control *wbc);
2777extern void ext4_end_io_rsv_work(struct work_struct *work);
2778extern void ext4_io_submit(struct ext4_io_submit *io);
2779extern int ext4_bio_write_page(struct ext4_io_submit *io,
2780 struct page *page,
2781 int len,
2782 struct writeback_control *wbc);
2783
2784
2785extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
2786extern void ext4_mmp_csum_set(struct super_block *sb, struct mmp_struct *mmp);
2787extern int ext4_mmp_csum_verify(struct super_block *sb,
2788 struct mmp_struct *mmp);
2789
2790
2791
2792
2793
2794enum ext4_state_bits {
2795 BH_Uninit
2796 = BH_JBDPrivateStart,
2797 BH_AllocFromCluster,
2798
2799};
2800
2801
2802
2803
2804
2805
2806#define BH_BITMAP_UPTODATE BH_JBDPrivateStart
2807
2808static inline int bitmap_uptodate(struct buffer_head *bh)
2809{
2810 return (buffer_uptodate(bh) &&
2811 test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state));
2812}
2813static inline void set_bitmap_uptodate(struct buffer_head *bh)
2814{
2815 set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
2816}
2817
2818
2819
2820
2821
2822static inline void ext4_inode_block_unlocked_dio(struct inode *inode)
2823{
2824 ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
2825 smp_mb();
2826}
2827static inline void ext4_inode_resume_unlocked_dio(struct inode *inode)
2828{
2829 smp_mb();
2830 ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK);
2831}
2832
2833#define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
2834
2835
2836#define EXT4_WQ_HASH_SZ 37
2837#define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\
2838 EXT4_WQ_HASH_SZ])
2839#define ext4_aio_mutex(v) (&ext4__aio_mutex[((unsigned long)(v)) %\
2840 EXT4_WQ_HASH_SZ])
2841extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
2842extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ];
2843
2844#define EXT4_RESIZING 0
2845extern int ext4_resize_begin(struct super_block *sb);
2846extern void ext4_resize_end(struct super_block *sb);
2847
2848#endif
2849
2850#endif
2851