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13#include <linux/fs.h>
14#include <linux/ext2_fs.h>
15#include <linux/blockgroup_lock.h>
16#include <linux/percpu_counter.h>
17#include <linux/rbtree.h>
18
19
20
21
22typedef int ext2_grpblk_t;
23
24
25typedef unsigned long ext2_fsblk_t;
26
27#define E2FSBLK "%lu"
28
29struct ext2_reserve_window {
30 ext2_fsblk_t _rsv_start;
31 ext2_fsblk_t _rsv_end;
32};
33
34struct ext2_reserve_window_node {
35 struct rb_node rsv_node;
36 __u32 rsv_goal_size;
37 __u32 rsv_alloc_hit;
38 struct ext2_reserve_window rsv_window;
39};
40
41struct ext2_block_alloc_info {
42
43 struct ext2_reserve_window_node rsv_window_node;
44
45
46
47
48
49
50 __u32 last_alloc_logical_block;
51
52
53
54
55
56
57
58 ext2_fsblk_t last_alloc_physical_block;
59};
60
61#define rsv_start rsv_window._rsv_start
62#define rsv_end rsv_window._rsv_end
63
64
65
66
67struct ext2_sb_info {
68 unsigned long s_frag_size;
69 unsigned long s_frags_per_block;
70 unsigned long s_inodes_per_block;
71 unsigned long s_frags_per_group;
72 unsigned long s_blocks_per_group;
73 unsigned long s_inodes_per_group;
74 unsigned long s_itb_per_group;
75 unsigned long s_gdb_count;
76 unsigned long s_desc_per_block;
77 unsigned long s_groups_count;
78 unsigned long s_overhead_last;
79 unsigned long s_blocks_last;
80 struct buffer_head * s_sbh;
81 struct ext2_super_block * s_es;
82 struct buffer_head ** s_group_desc;
83 unsigned long s_mount_opt;
84 unsigned long s_sb_block;
85 kuid_t s_resuid;
86 kgid_t s_resgid;
87 unsigned short s_mount_state;
88 unsigned short s_pad;
89 int s_addr_per_block_bits;
90 int s_desc_per_block_bits;
91 int s_inode_size;
92 int s_first_ino;
93 spinlock_t s_next_gen_lock;
94 u32 s_next_generation;
95 unsigned long s_dir_count;
96 u8 *s_debts;
97 struct percpu_counter s_freeblocks_counter;
98 struct percpu_counter s_freeinodes_counter;
99 struct percpu_counter s_dirs_counter;
100 struct blockgroup_lock *s_blockgroup_lock;
101
102 spinlock_t s_rsv_window_lock;
103 struct rb_root s_rsv_window_root;
104 struct ext2_reserve_window_node s_rsv_window_head;
105
106
107
108
109
110
111
112
113 spinlock_t s_lock;
114};
115
116static inline spinlock_t *
117sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group)
118{
119 return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group);
120}
121
122
123
124
125#undef EXT2FS_DEBUG
126
127
128
129
130#define EXT2_DEFAULT_RESERVE_BLOCKS 8
131
132#define EXT2_MAX_RESERVE_BLOCKS 1027
133#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
134
135
136
137#define EXT2FS_DATE "95/08/09"
138#define EXT2FS_VERSION "0.5b"
139
140
141
142
143#ifdef EXT2FS_DEBUG
144# define ext2_debug(f, a...) { \
145 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
146 __FILE__, __LINE__, __func__); \
147 printk (f, ## a); \
148 }
149#else
150# define ext2_debug(f, a...)
151#endif
152
153
154
155
156#define EXT2_BAD_INO 1
157#define EXT2_ROOT_INO 2
158#define EXT2_BOOT_LOADER_INO 5
159#define EXT2_UNDEL_DIR_INO 6
160
161
162#define EXT2_GOOD_OLD_FIRST_INO 11
163
164static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
165{
166 return sb->s_fs_info;
167}
168
169
170
171
172#define EXT2_MIN_BLOCK_SIZE 1024
173#define EXT2_MAX_BLOCK_SIZE 4096
174#define EXT2_MIN_BLOCK_LOG_SIZE 10
175#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
176#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
177#define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
178#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
179#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
180#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
181
182
183
184
185#define EXT2_MIN_FRAG_SIZE 1024
186#define EXT2_MAX_FRAG_SIZE 4096
187#define EXT2_MIN_FRAG_LOG_SIZE 10
188#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
189#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
190
191
192
193
194struct ext2_group_desc
195{
196 __le32 bg_block_bitmap;
197 __le32 bg_inode_bitmap;
198 __le32 bg_inode_table;
199 __le16 bg_free_blocks_count;
200 __le16 bg_free_inodes_count;
201 __le16 bg_used_dirs_count;
202 __le16 bg_pad;
203 __le32 bg_reserved[3];
204};
205
206
207
208
209#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
210#define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
211#define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
212#define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
213
214
215
216
217#define EXT2_NDIR_BLOCKS 12
218#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
219#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
220#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
221#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
222
223
224
225
226#define EXT2_SECRM_FL FS_SECRM_FL
227#define EXT2_UNRM_FL FS_UNRM_FL
228#define EXT2_COMPR_FL FS_COMPR_FL
229#define EXT2_SYNC_FL FS_SYNC_FL
230#define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL
231#define EXT2_APPEND_FL FS_APPEND_FL
232#define EXT2_NODUMP_FL FS_NODUMP_FL
233#define EXT2_NOATIME_FL FS_NOATIME_FL
234
235#define EXT2_DIRTY_FL FS_DIRTY_FL
236#define EXT2_COMPRBLK_FL FS_COMPRBLK_FL
237#define EXT2_NOCOMP_FL FS_NOCOMP_FL
238#define EXT2_ECOMPR_FL FS_ECOMPR_FL
239
240#define EXT2_BTREE_FL FS_BTREE_FL
241#define EXT2_INDEX_FL FS_INDEX_FL
242#define EXT2_IMAGIC_FL FS_IMAGIC_FL
243#define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL
244#define EXT2_NOTAIL_FL FS_NOTAIL_FL
245#define EXT2_DIRSYNC_FL FS_DIRSYNC_FL
246#define EXT2_TOPDIR_FL FS_TOPDIR_FL
247#define EXT2_RESERVED_FL FS_RESERVED_FL
248
249#define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE
250#define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE
251
252
253#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
254 EXT2_SYNC_FL | EXT2_NODUMP_FL |\
255 EXT2_NOATIME_FL | EXT2_COMPRBLK_FL |\
256 EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
257 EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
258
259
260#define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
261
262
263#define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
264
265
266static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags)
267{
268 if (S_ISDIR(mode))
269 return flags;
270 else if (S_ISREG(mode))
271 return flags & EXT2_REG_FLMASK;
272 else
273 return flags & EXT2_OTHER_FLMASK;
274}
275
276
277
278
279#define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
280#define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
281#define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
282#define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
283#define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
284#define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
285
286
287
288
289#define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
290#define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
291#define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
292#define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
293
294
295
296
297struct ext2_inode {
298 __le16 i_mode;
299 __le16 i_uid;
300 __le32 i_size;
301 __le32 i_atime;
302 __le32 i_ctime;
303 __le32 i_mtime;
304 __le32 i_dtime;
305 __le16 i_gid;
306 __le16 i_links_count;
307 __le32 i_blocks;
308 __le32 i_flags;
309 union {
310 struct {
311 __le32 l_i_reserved1;
312 } linux1;
313 struct {
314 __le32 h_i_translator;
315 } hurd1;
316 struct {
317 __le32 m_i_reserved1;
318 } masix1;
319 } osd1;
320 __le32 i_block[EXT2_N_BLOCKS];
321 __le32 i_generation;
322 __le32 i_file_acl;
323 __le32 i_dir_acl;
324 __le32 i_faddr;
325 union {
326 struct {
327 __u8 l_i_frag;
328 __u8 l_i_fsize;
329 __u16 i_pad1;
330 __le16 l_i_uid_high;
331 __le16 l_i_gid_high;
332 __u32 l_i_reserved2;
333 } linux2;
334 struct {
335 __u8 h_i_frag;
336 __u8 h_i_fsize;
337 __le16 h_i_mode_high;
338 __le16 h_i_uid_high;
339 __le16 h_i_gid_high;
340 __le32 h_i_author;
341 } hurd2;
342 struct {
343 __u8 m_i_frag;
344 __u8 m_i_fsize;
345 __u16 m_pad1;
346 __u32 m_i_reserved2[2];
347 } masix2;
348 } osd2;
349};
350
351#define i_size_high i_dir_acl
352
353#define i_reserved1 osd1.linux1.l_i_reserved1
354#define i_frag osd2.linux2.l_i_frag
355#define i_fsize osd2.linux2.l_i_fsize
356#define i_uid_low i_uid
357#define i_gid_low i_gid
358#define i_uid_high osd2.linux2.l_i_uid_high
359#define i_gid_high osd2.linux2.l_i_gid_high
360#define i_reserved2 osd2.linux2.l_i_reserved2
361
362
363
364
365#define EXT2_VALID_FS 0x0001
366#define EXT2_ERROR_FS 0x0002
367
368
369
370
371#define EXT2_MOUNT_CHECK 0x000001
372#define EXT2_MOUNT_OLDALLOC 0x000002
373#define EXT2_MOUNT_GRPID 0x000004
374#define EXT2_MOUNT_DEBUG 0x000008
375#define EXT2_MOUNT_ERRORS_CONT 0x000010
376#define EXT2_MOUNT_ERRORS_RO 0x000020
377#define EXT2_MOUNT_ERRORS_PANIC 0x000040
378#define EXT2_MOUNT_MINIX_DF 0x000080
379#define EXT2_MOUNT_NOBH 0x000100
380#define EXT2_MOUNT_NO_UID32 0x000200
381#define EXT2_MOUNT_XATTR_USER 0x004000
382#define EXT2_MOUNT_POSIX_ACL 0x008000
383#define EXT2_MOUNT_XIP 0x010000
384#define EXT2_MOUNT_USRQUOTA 0x020000
385#define EXT2_MOUNT_GRPQUOTA 0x040000
386#define EXT2_MOUNT_RESERVATION 0x080000
387#ifdef CONFIG_FS_DAX
388#define EXT2_MOUNT_DAX 0x100000
389#else
390#define EXT2_MOUNT_DAX 0
391#endif
392
393
394#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
395#define set_opt(o, opt) o |= EXT2_MOUNT_##opt
396#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
397 EXT2_MOUNT_##opt)
398
399
400
401#define EXT2_DFL_MAX_MNT_COUNT 20
402#define EXT2_DFL_CHECKINTERVAL 0
403
404
405
406
407#define EXT2_ERRORS_CONTINUE 1
408#define EXT2_ERRORS_RO 2
409#define EXT2_ERRORS_PANIC 3
410#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
411
412
413
414
415struct ext2_super_block {
416 __le32 s_inodes_count;
417 __le32 s_blocks_count;
418 __le32 s_r_blocks_count;
419 __le32 s_free_blocks_count;
420 __le32 s_free_inodes_count;
421 __le32 s_first_data_block;
422 __le32 s_log_block_size;
423 __le32 s_log_frag_size;
424 __le32 s_blocks_per_group;
425 __le32 s_frags_per_group;
426 __le32 s_inodes_per_group;
427 __le32 s_mtime;
428 __le32 s_wtime;
429 __le16 s_mnt_count;
430 __le16 s_max_mnt_count;
431 __le16 s_magic;
432 __le16 s_state;
433 __le16 s_errors;
434 __le16 s_minor_rev_level;
435 __le32 s_lastcheck;
436 __le32 s_checkinterval;
437 __le32 s_creator_os;
438 __le32 s_rev_level;
439 __le16 s_def_resuid;
440 __le16 s_def_resgid;
441
442
443
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445
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448
449
450
451
452
453
454 __le32 s_first_ino;
455 __le16 s_inode_size;
456 __le16 s_block_group_nr;
457 __le32 s_feature_compat;
458 __le32 s_feature_incompat;
459 __le32 s_feature_ro_compat;
460 __u8 s_uuid[16];
461 char s_volume_name[16];
462 char s_last_mounted[64];
463 __le32 s_algorithm_usage_bitmap;
464
465
466
467
468 __u8 s_prealloc_blocks;
469 __u8 s_prealloc_dir_blocks;
470 __u16 s_padding1;
471
472
473
474 __u8 s_journal_uuid[16];
475 __u32 s_journal_inum;
476 __u32 s_journal_dev;
477 __u32 s_last_orphan;
478 __u32 s_hash_seed[4];
479 __u8 s_def_hash_version;
480 __u8 s_reserved_char_pad;
481 __u16 s_reserved_word_pad;
482 __le32 s_default_mount_opts;
483 __le32 s_first_meta_bg;
484 __u32 s_reserved[190];
485};
486
487
488
489
490#define EXT2_OS_LINUX 0
491#define EXT2_OS_HURD 1
492#define EXT2_OS_MASIX 2
493#define EXT2_OS_FREEBSD 3
494#define EXT2_OS_LITES 4
495
496
497
498
499#define EXT2_GOOD_OLD_REV 0
500#define EXT2_DYNAMIC_REV 1
501
502#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
503#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
504
505#define EXT2_GOOD_OLD_INODE_SIZE 128
506
507
508
509
510
511#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
512 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
513#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
514 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
515#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
516 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
517#define EXT2_SET_COMPAT_FEATURE(sb,mask) \
518 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
519#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
520 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
521#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
522 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
523#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
524 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
525#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
526 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
527#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
528 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
529
530#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
531#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
532#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
533#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
534#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
535#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
536#define EXT2_FEATURE_COMPAT_ANY 0xffffffff
537
538#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
539#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
540#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
541#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
542
543#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
544#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
545#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
546#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
547#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
548#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
549
550#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
551#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
552 EXT2_FEATURE_INCOMPAT_META_BG)
553#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
554 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
555 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
556#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
557#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
558
559
560
561
562#define EXT2_DEF_RESUID 0
563#define EXT2_DEF_RESGID 0
564
565
566
567
568#define EXT2_DEFM_DEBUG 0x0001
569#define EXT2_DEFM_BSDGROUPS 0x0002
570#define EXT2_DEFM_XATTR_USER 0x0004
571#define EXT2_DEFM_ACL 0x0008
572#define EXT2_DEFM_UID16 0x0010
573
574#define EXT3_DEFM_JMODE 0x0060
575#define EXT3_DEFM_JMODE_DATA 0x0020
576#define EXT3_DEFM_JMODE_ORDERED 0x0040
577#define EXT3_DEFM_JMODE_WBACK 0x0060
578
579
580
581
582
583struct ext2_dir_entry {
584 __le32 inode;
585 __le16 rec_len;
586 __le16 name_len;
587 char name[];
588};
589
590
591
592
593
594
595
596struct ext2_dir_entry_2 {
597 __le32 inode;
598 __le16 rec_len;
599 __u8 name_len;
600 __u8 file_type;
601 char name[];
602};
603
604
605
606
607
608enum {
609 EXT2_FT_UNKNOWN = 0,
610 EXT2_FT_REG_FILE = 1,
611 EXT2_FT_DIR = 2,
612 EXT2_FT_CHRDEV = 3,
613 EXT2_FT_BLKDEV = 4,
614 EXT2_FT_FIFO = 5,
615 EXT2_FT_SOCK = 6,
616 EXT2_FT_SYMLINK = 7,
617 EXT2_FT_MAX
618};
619
620
621
622
623
624
625#define EXT2_DIR_PAD 4
626#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
627#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
628 ~EXT2_DIR_ROUND)
629#define EXT2_MAX_REC_LEN ((1<<16)-1)
630
631static inline void verify_offsets(void)
632{
633#define A(x,y) BUILD_BUG_ON(x != offsetof(struct ext2_super_block, y));
634 A(EXT2_SB_MAGIC_OFFSET, s_magic);
635 A(EXT2_SB_BLOCKS_OFFSET, s_blocks_count);
636 A(EXT2_SB_BSIZE_OFFSET, s_log_block_size);
637#undef A
638}
639
640
641
642
643struct ext2_mount_options {
644 unsigned long s_mount_opt;
645 kuid_t s_resuid;
646 kgid_t s_resgid;
647};
648
649
650
651
652struct ext2_inode_info {
653 __le32 i_data[15];
654 __u32 i_flags;
655 __u32 i_faddr;
656 __u8 i_frag_no;
657 __u8 i_frag_size;
658 __u16 i_state;
659 __u32 i_file_acl;
660 __u32 i_dir_acl;
661 __u32 i_dtime;
662
663
664
665
666
667
668
669
670 __u32 i_block_group;
671
672
673 struct ext2_block_alloc_info *i_block_alloc_info;
674
675 __u32 i_dir_start_lookup;
676#ifdef CONFIG_EXT2_FS_XATTR
677
678
679
680
681
682
683
684 struct rw_semaphore xattr_sem;
685#endif
686 rwlock_t i_meta_lock;
687#ifdef CONFIG_FS_DAX
688 struct rw_semaphore dax_sem;
689#endif
690
691
692
693
694
695
696
697 struct mutex truncate_mutex;
698 struct inode vfs_inode;
699 struct list_head i_orphan;
700#ifdef CONFIG_QUOTA
701 struct dquot *i_dquot[MAXQUOTAS];
702#endif
703};
704
705#ifdef CONFIG_FS_DAX
706#define dax_sem_down_write(ext2_inode) down_write(&(ext2_inode)->dax_sem)
707#define dax_sem_up_write(ext2_inode) up_write(&(ext2_inode)->dax_sem)
708#else
709#define dax_sem_down_write(ext2_inode)
710#define dax_sem_up_write(ext2_inode)
711#endif
712
713
714
715
716#define EXT2_STATE_NEW 0x00000001
717
718
719
720
721
722
723
724
725
726
727
728static inline struct ext2_inode_info *EXT2_I(struct inode *inode)
729{
730 return container_of(inode, struct ext2_inode_info, vfs_inode);
731}
732
733
734extern int ext2_bg_has_super(struct super_block *sb, int group);
735extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
736extern ext2_fsblk_t ext2_new_block(struct inode *, unsigned long, int *);
737extern ext2_fsblk_t ext2_new_blocks(struct inode *, unsigned long,
738 unsigned long *, int *);
739extern void ext2_free_blocks (struct inode *, unsigned long,
740 unsigned long);
741extern unsigned long ext2_count_free_blocks (struct super_block *);
742extern unsigned long ext2_count_dirs (struct super_block *);
743extern void ext2_check_blocks_bitmap (struct super_block *);
744extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
745 unsigned int block_group,
746 struct buffer_head ** bh);
747extern void ext2_discard_reservation (struct inode *);
748extern int ext2_should_retry_alloc(struct super_block *sb, int *retries);
749extern void ext2_init_block_alloc_info(struct inode *);
750extern void ext2_rsv_window_add(struct super_block *sb, struct ext2_reserve_window_node *rsv);
751
752
753extern int ext2_add_link (struct dentry *, struct inode *);
754extern ino_t ext2_inode_by_name(struct inode *, struct qstr *);
755extern int ext2_make_empty(struct inode *, struct inode *);
756extern struct ext2_dir_entry_2 * ext2_find_entry (struct inode *,struct qstr *, struct page **);
757extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *);
758extern int ext2_empty_dir (struct inode *);
759extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **);
760extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int);
761
762
763extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *);
764extern void ext2_free_inode (struct inode *);
765extern unsigned long ext2_count_free_inodes (struct super_block *);
766extern void ext2_check_inodes_bitmap (struct super_block *);
767extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
768
769
770extern struct inode *ext2_iget (struct super_block *, unsigned long);
771extern int ext2_write_inode (struct inode *, struct writeback_control *);
772extern void ext2_evict_inode(struct inode *);
773extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int);
774extern int ext2_setattr (struct dentry *, struct iattr *);
775extern void ext2_set_inode_flags(struct inode *inode);
776extern void ext2_get_inode_flags(struct ext2_inode_info *);
777extern int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
778 u64 start, u64 len);
779
780
781extern long ext2_ioctl(struct file *, unsigned int, unsigned long);
782extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long);
783
784
785struct dentry *ext2_get_parent(struct dentry *child);
786
787
788extern __printf(3, 4)
789void ext2_error(struct super_block *, const char *, const char *, ...);
790extern __printf(3, 4)
791void ext2_msg(struct super_block *, const char *, const char *, ...);
792extern void ext2_update_dynamic_rev (struct super_block *sb);
793extern void ext2_write_super (struct super_block *);
794
795
796
797
798
799
800extern const struct file_operations ext2_dir_operations;
801
802
803extern int ext2_fsync(struct file *file, loff_t start, loff_t end,
804 int datasync);
805extern const struct inode_operations ext2_file_inode_operations;
806extern const struct file_operations ext2_file_operations;
807
808
809extern const struct address_space_operations ext2_aops;
810extern const struct address_space_operations ext2_nobh_aops;
811
812
813extern const struct inode_operations ext2_dir_inode_operations;
814extern const struct inode_operations ext2_special_inode_operations;
815
816
817extern const struct inode_operations ext2_fast_symlink_inode_operations;
818extern const struct inode_operations ext2_symlink_inode_operations;
819
820static inline ext2_fsblk_t
821ext2_group_first_block_no(struct super_block *sb, unsigned long group_no)
822{
823 return group_no * (ext2_fsblk_t)EXT2_BLOCKS_PER_GROUP(sb) +
824 le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block);
825}
826
827#define ext2_set_bit __test_and_set_bit_le
828#define ext2_clear_bit __test_and_clear_bit_le
829#define ext2_test_bit test_bit_le
830#define ext2_find_first_zero_bit find_first_zero_bit_le
831#define ext2_find_next_zero_bit find_next_zero_bit_le
832