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11#ifndef _LINUX_F2FS_H
12#define _LINUX_F2FS_H
13
14#include <linux/types.h>
15#include <linux/page-flags.h>
16#include <linux/buffer_head.h>
17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
20#include <linux/kobject.h>
21#include <linux/sched.h>
22
23#ifdef CONFIG_F2FS_CHECK_FS
24#define f2fs_bug_on(condition) BUG_ON(condition)
25#define f2fs_down_write(x, y) down_write_nest_lock(x, y)
26#else
27#define f2fs_bug_on(condition) WARN_ON(condition)
28#define f2fs_down_write(x, y) down_write(x)
29#endif
30
31
32
33
34#define F2FS_MOUNT_BG_GC 0x00000001
35#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
36#define F2FS_MOUNT_DISCARD 0x00000004
37#define F2FS_MOUNT_NOHEAP 0x00000008
38#define F2FS_MOUNT_XATTR_USER 0x00000010
39#define F2FS_MOUNT_POSIX_ACL 0x00000020
40#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
41#define F2FS_MOUNT_INLINE_XATTR 0x00000080
42#define F2FS_MOUNT_INLINE_DATA 0x00000100
43#define F2FS_MOUNT_FLUSH_MERGE 0x00000200
44#define F2FS_MOUNT_NOBARRIER 0x00000400
45
46#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
47#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
48#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
49
50#define ver_after(a, b) (typecheck(unsigned long long, a) && \
51 typecheck(unsigned long long, b) && \
52 ((long long)((a) - (b)) > 0))
53
54typedef u32 block_t;
55
56
57
58typedef u32 nid_t;
59
60struct f2fs_mount_info {
61 unsigned int opt;
62};
63
64#define CRCPOLY_LE 0xedb88320
65
66static inline __u32 f2fs_crc32(void *buf, size_t len)
67{
68 unsigned char *p = (unsigned char *)buf;
69 __u32 crc = F2FS_SUPER_MAGIC;
70 int i;
71
72 while (len--) {
73 crc ^= *p++;
74 for (i = 0; i < 8; i++)
75 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
76 }
77 return crc;
78}
79
80static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
81{
82 return f2fs_crc32(buf, buf_size) == blk_crc;
83}
84
85
86
87
88enum {
89 NAT_BITMAP,
90 SIT_BITMAP
91};
92
93
94
95
96enum {
97 META_CP,
98 META_NAT,
99 META_SIT,
100 META_SSA
101};
102
103
104enum {
105 ORPHAN_INO,
106 APPEND_INO,
107 UPDATE_INO,
108 MAX_INO_ENTRY,
109};
110
111struct ino_entry {
112 struct list_head list;
113 nid_t ino;
114};
115
116
117struct dir_inode_entry {
118 struct list_head list;
119 struct inode *inode;
120};
121
122
123struct discard_entry {
124 struct list_head list;
125 block_t blkaddr;
126 int len;
127};
128
129
130struct fsync_inode_entry {
131 struct list_head list;
132 struct inode *inode;
133 block_t blkaddr;
134};
135
136#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
137#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
138
139#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
140#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
141#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
142#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
143
144static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
145{
146 int before = nats_in_cursum(rs);
147 rs->n_nats = cpu_to_le16(before + i);
148 return before;
149}
150
151static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
152{
153 int before = sits_in_cursum(rs);
154 rs->n_sits = cpu_to_le16(before + i);
155 return before;
156}
157
158
159
160
161#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
162#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
163
164#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
165
166
167
168#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
169#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
170#endif
171
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178
179
180#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
181 >> OFFSET_BIT_SHIFT)
182enum {
183 ALLOC_NODE,
184 LOOKUP_NODE,
185 LOOKUP_NODE_RA,
186
187
188
189};
190
191#define F2FS_LINK_MAX 32000
192
193#define MAX_DIR_RA_PAGES 4
194
195
196#define F2FS_MIN_EXTENT_LEN 16
197
198struct extent_info {
199 rwlock_t ext_lock;
200 unsigned int fofs;
201 u32 blk_addr;
202 unsigned int len;
203};
204
205
206
207
208#define FADVISE_COLD_BIT 0x01
209#define FADVISE_LOST_PINO_BIT 0x02
210
211#define DEF_DIR_LEVEL 0
212
213struct f2fs_inode_info {
214 struct inode vfs_inode;
215 unsigned long i_flags;
216 unsigned char i_advise;
217 unsigned char i_dir_level;
218 unsigned int i_current_depth;
219 unsigned int i_pino;
220 umode_t i_acl_mode;
221
222
223 unsigned long flags;
224 struct rw_semaphore i_sem;
225 atomic_t dirty_dents;
226 f2fs_hash_t chash;
227 unsigned int clevel;
228 nid_t i_xattr_nid;
229 unsigned long long xattr_ver;
230 struct extent_info ext;
231 struct dir_inode_entry *dirty_dir;
232};
233
234static inline void get_extent_info(struct extent_info *ext,
235 struct f2fs_extent i_ext)
236{
237 write_lock(&ext->ext_lock);
238 ext->fofs = le32_to_cpu(i_ext.fofs);
239 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
240 ext->len = le32_to_cpu(i_ext.len);
241 write_unlock(&ext->ext_lock);
242}
243
244static inline void set_raw_extent(struct extent_info *ext,
245 struct f2fs_extent *i_ext)
246{
247 read_lock(&ext->ext_lock);
248 i_ext->fofs = cpu_to_le32(ext->fofs);
249 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
250 i_ext->len = cpu_to_le32(ext->len);
251 read_unlock(&ext->ext_lock);
252}
253
254struct f2fs_nm_info {
255 block_t nat_blkaddr;
256 nid_t max_nid;
257 nid_t available_nids;
258 nid_t next_scan_nid;
259 unsigned int ram_thresh;
260
261
262 struct radix_tree_root nat_root;
263 rwlock_t nat_tree_lock;
264 unsigned int nat_cnt;
265 struct list_head nat_entries;
266 struct list_head dirty_nat_entries;
267 struct list_head nat_entry_set;
268 unsigned int dirty_nat_cnt;
269
270
271 struct radix_tree_root free_nid_root;
272 struct list_head free_nid_list;
273 spinlock_t free_nid_list_lock;
274 unsigned int fcnt;
275 struct mutex build_lock;
276
277
278 char *nat_bitmap;
279 int bitmap_size;
280};
281
282
283
284
285
286
287struct dnode_of_data {
288 struct inode *inode;
289 struct page *inode_page;
290 struct page *node_page;
291 nid_t nid;
292 unsigned int ofs_in_node;
293 bool inode_page_locked;
294 block_t data_blkaddr;
295};
296
297static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
298 struct page *ipage, struct page *npage, nid_t nid)
299{
300 memset(dn, 0, sizeof(*dn));
301 dn->inode = inode;
302 dn->inode_page = ipage;
303 dn->node_page = npage;
304 dn->nid = nid;
305}
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319
320#define NR_CURSEG_DATA_TYPE (3)
321#define NR_CURSEG_NODE_TYPE (3)
322#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
323
324enum {
325 CURSEG_HOT_DATA = 0,
326 CURSEG_WARM_DATA,
327 CURSEG_COLD_DATA,
328 CURSEG_HOT_NODE,
329 CURSEG_WARM_NODE,
330 CURSEG_COLD_NODE,
331 NO_CHECK_TYPE
332};
333
334struct flush_cmd {
335 struct flush_cmd *next;
336 struct completion wait;
337 int ret;
338};
339
340struct flush_cmd_control {
341 struct task_struct *f2fs_issue_flush;
342 wait_queue_head_t flush_wait_queue;
343 struct flush_cmd *issue_list;
344 struct flush_cmd *dispatch_list;
345 spinlock_t issue_lock;
346 struct flush_cmd *issue_tail;
347};
348
349struct f2fs_sm_info {
350 struct sit_info *sit_info;
351 struct free_segmap_info *free_info;
352 struct dirty_seglist_info *dirty_info;
353 struct curseg_info *curseg_array;
354
355 block_t seg0_blkaddr;
356 block_t main_blkaddr;
357 block_t ssa_blkaddr;
358
359 unsigned int segment_count;
360 unsigned int main_segments;
361 unsigned int reserved_segments;
362 unsigned int ovp_segments;
363
364
365 unsigned int rec_prefree_segments;
366
367
368 struct list_head discard_list;
369 int nr_discards;
370 int max_discards;
371
372 unsigned int ipu_policy;
373 unsigned int min_ipu_util;
374
375
376 struct flush_cmd_control *cmd_control_info;
377
378};
379
380
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387
388
389enum count_type {
390 F2FS_WRITEBACK,
391 F2FS_DIRTY_DENTS,
392 F2FS_DIRTY_NODES,
393 F2FS_DIRTY_META,
394 NR_COUNT_TYPE,
395};
396
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407
408#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
409enum page_type {
410 DATA,
411 NODE,
412 META,
413 NR_PAGE_TYPE,
414 META_FLUSH,
415};
416
417struct f2fs_io_info {
418 enum page_type type;
419 int rw;
420};
421
422#define is_read_io(rw) (((rw) & 1) == READ)
423struct f2fs_bio_info {
424 struct f2fs_sb_info *sbi;
425 struct bio *bio;
426 sector_t last_block_in_bio;
427 struct f2fs_io_info fio;
428 struct rw_semaphore io_rwsem;
429};
430
431struct f2fs_sb_info {
432 struct super_block *sb;
433 struct proc_dir_entry *s_proc;
434 struct buffer_head *raw_super_buf;
435 struct f2fs_super_block *raw_super;
436 int s_dirty;
437
438
439 struct f2fs_nm_info *nm_info;
440 struct inode *node_inode;
441
442
443 struct f2fs_sm_info *sm_info;
444
445
446 struct f2fs_bio_info read_io;
447 struct f2fs_bio_info write_io[NR_PAGE_TYPE];
448 struct completion *wait_io;
449
450
451 struct f2fs_checkpoint *ckpt;
452 struct inode *meta_inode;
453 struct mutex cp_mutex;
454 struct rw_semaphore cp_rwsem;
455 struct rw_semaphore node_write;
456 struct mutex writepages;
457 bool por_doing;
458 wait_queue_head_t cp_wait;
459
460
461 struct radix_tree_root ino_root[MAX_INO_ENTRY];
462 spinlock_t ino_lock[MAX_INO_ENTRY];
463 struct list_head ino_list[MAX_INO_ENTRY];
464
465
466 unsigned int n_orphans;
467 unsigned int max_orphans;
468
469
470 struct list_head dir_inode_list;
471 spinlock_t dir_inode_lock;
472
473
474 unsigned int log_sectors_per_block;
475 unsigned int log_blocksize;
476 unsigned int blocksize;
477 unsigned int root_ino_num;
478 unsigned int node_ino_num;
479 unsigned int meta_ino_num;
480 unsigned int log_blocks_per_seg;
481 unsigned int blocks_per_seg;
482 unsigned int segs_per_sec;
483 unsigned int secs_per_zone;
484 unsigned int total_sections;
485 unsigned int total_node_count;
486 unsigned int total_valid_node_count;
487 unsigned int total_valid_inode_count;
488 int active_logs;
489 int dir_level;
490
491 block_t user_block_count;
492 block_t total_valid_block_count;
493 block_t alloc_valid_block_count;
494 block_t last_valid_block_count;
495 u32 s_next_generation;
496 atomic_t nr_pages[NR_COUNT_TYPE];
497
498 struct f2fs_mount_info mount_opt;
499
500
501 struct mutex gc_mutex;
502 struct f2fs_gc_kthread *gc_thread;
503 unsigned int cur_victim_sec;
504
505
506 unsigned int max_victim_search;
507
508
509
510
511
512#ifdef CONFIG_F2FS_STAT_FS
513 struct f2fs_stat_info *stat_info;
514 unsigned int segment_count[2];
515 unsigned int block_count[2];
516 int total_hit_ext, read_hit_ext;
517 int inline_inode;
518 int bg_gc;
519 unsigned int n_dirty_dirs;
520#endif
521 unsigned int last_victim[2];
522 spinlock_t stat_lock;
523
524
525 struct kobject s_kobj;
526 struct completion s_kobj_unregister;
527};
528
529
530
531
532static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
533{
534 return container_of(inode, struct f2fs_inode_info, vfs_inode);
535}
536
537static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
538{
539 return sb->s_fs_info;
540}
541
542static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
543{
544 return (struct f2fs_super_block *)(sbi->raw_super);
545}
546
547static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
548{
549 return (struct f2fs_checkpoint *)(sbi->ckpt);
550}
551
552static inline struct f2fs_node *F2FS_NODE(struct page *page)
553{
554 return (struct f2fs_node *)page_address(page);
555}
556
557static inline struct f2fs_inode *F2FS_INODE(struct page *page)
558{
559 return &((struct f2fs_node *)page_address(page))->i;
560}
561
562static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
563{
564 return (struct f2fs_nm_info *)(sbi->nm_info);
565}
566
567static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
568{
569 return (struct f2fs_sm_info *)(sbi->sm_info);
570}
571
572static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
573{
574 return (struct sit_info *)(SM_I(sbi)->sit_info);
575}
576
577static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
578{
579 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
580}
581
582static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
583{
584 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
585}
586
587static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
588{
589 return sbi->meta_inode->i_mapping;
590}
591
592static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
593{
594 return sbi->node_inode->i_mapping;
595}
596
597static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
598{
599 sbi->s_dirty = 1;
600}
601
602static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
603{
604 sbi->s_dirty = 0;
605}
606
607static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
608{
609 return le64_to_cpu(cp->checkpoint_ver);
610}
611
612static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
613{
614 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
615 return ckpt_flags & f;
616}
617
618static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
619{
620 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
621 ckpt_flags |= f;
622 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
623}
624
625static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
626{
627 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
628 ckpt_flags &= (~f);
629 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
630}
631
632static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
633{
634 down_read(&sbi->cp_rwsem);
635}
636
637static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
638{
639 up_read(&sbi->cp_rwsem);
640}
641
642static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
643{
644 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
645}
646
647static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
648{
649 up_write(&sbi->cp_rwsem);
650}
651
652
653
654
655static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
656{
657 if (unlikely(nid < F2FS_ROOT_INO(sbi)))
658 return -EINVAL;
659 if (unlikely(nid >= NM_I(sbi)->max_nid))
660 return -EINVAL;
661 return 0;
662}
663
664#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
665
666
667
668
669static inline int F2FS_HAS_BLOCKS(struct inode *inode)
670{
671 if (F2FS_I(inode)->i_xattr_nid)
672 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
673 else
674 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
675}
676
677static inline bool f2fs_has_xattr_block(unsigned int ofs)
678{
679 return ofs == XATTR_NODE_OFFSET;
680}
681
682static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
683 struct inode *inode, blkcnt_t count)
684{
685 block_t valid_block_count;
686
687 spin_lock(&sbi->stat_lock);
688 valid_block_count =
689 sbi->total_valid_block_count + (block_t)count;
690 if (unlikely(valid_block_count > sbi->user_block_count)) {
691 spin_unlock(&sbi->stat_lock);
692 return false;
693 }
694 inode->i_blocks += count;
695 sbi->total_valid_block_count = valid_block_count;
696 sbi->alloc_valid_block_count += (block_t)count;
697 spin_unlock(&sbi->stat_lock);
698 return true;
699}
700
701static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
702 struct inode *inode,
703 blkcnt_t count)
704{
705 spin_lock(&sbi->stat_lock);
706 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
707 f2fs_bug_on(inode->i_blocks < count);
708 inode->i_blocks -= count;
709 sbi->total_valid_block_count -= (block_t)count;
710 spin_unlock(&sbi->stat_lock);
711}
712
713static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
714{
715 atomic_inc(&sbi->nr_pages[count_type]);
716 F2FS_SET_SB_DIRT(sbi);
717}
718
719static inline void inode_inc_dirty_dents(struct inode *inode)
720{
721 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
722 atomic_inc(&F2FS_I(inode)->dirty_dents);
723}
724
725static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
726{
727 atomic_dec(&sbi->nr_pages[count_type]);
728}
729
730static inline void inode_dec_dirty_dents(struct inode *inode)
731{
732 if (!S_ISDIR(inode->i_mode))
733 return;
734
735 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
736 atomic_dec(&F2FS_I(inode)->dirty_dents);
737}
738
739static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
740{
741 return atomic_read(&sbi->nr_pages[count_type]);
742}
743
744static inline int get_dirty_dents(struct inode *inode)
745{
746 return atomic_read(&F2FS_I(inode)->dirty_dents);
747}
748
749static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
750{
751 unsigned int pages_per_sec = sbi->segs_per_sec *
752 (1 << sbi->log_blocks_per_seg);
753 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
754 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
755}
756
757static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
758{
759 return sbi->total_valid_block_count;
760}
761
762static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
763{
764 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
765
766
767 if (flag == NAT_BITMAP)
768 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
769 else if (flag == SIT_BITMAP)
770 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
771
772 return 0;
773}
774
775static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
776{
777 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
778 int offset;
779
780 if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) {
781 if (flag == NAT_BITMAP)
782 return &ckpt->sit_nat_version_bitmap;
783 else
784 return (unsigned char *)ckpt + F2FS_BLKSIZE;
785 } else {
786 offset = (flag == NAT_BITMAP) ?
787 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
788 return &ckpt->sit_nat_version_bitmap + offset;
789 }
790}
791
792static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
793{
794 block_t start_addr;
795 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
796 unsigned long long ckpt_version = cur_cp_version(ckpt);
797
798 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
799
800
801
802
803
804 if (!(ckpt_version & 1))
805 start_addr += sbi->blocks_per_seg;
806
807 return start_addr;
808}
809
810static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
811{
812 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
813}
814
815static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
816 struct inode *inode)
817{
818 block_t valid_block_count;
819 unsigned int valid_node_count;
820
821 spin_lock(&sbi->stat_lock);
822
823 valid_block_count = sbi->total_valid_block_count + 1;
824 if (unlikely(valid_block_count > sbi->user_block_count)) {
825 spin_unlock(&sbi->stat_lock);
826 return false;
827 }
828
829 valid_node_count = sbi->total_valid_node_count + 1;
830 if (unlikely(valid_node_count > sbi->total_node_count)) {
831 spin_unlock(&sbi->stat_lock);
832 return false;
833 }
834
835 if (inode)
836 inode->i_blocks++;
837
838 sbi->alloc_valid_block_count++;
839 sbi->total_valid_node_count++;
840 sbi->total_valid_block_count++;
841 spin_unlock(&sbi->stat_lock);
842
843 return true;
844}
845
846static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
847 struct inode *inode)
848{
849 spin_lock(&sbi->stat_lock);
850
851 f2fs_bug_on(!sbi->total_valid_block_count);
852 f2fs_bug_on(!sbi->total_valid_node_count);
853 f2fs_bug_on(!inode->i_blocks);
854
855 inode->i_blocks--;
856 sbi->total_valid_node_count--;
857 sbi->total_valid_block_count--;
858
859 spin_unlock(&sbi->stat_lock);
860}
861
862static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
863{
864 return sbi->total_valid_node_count;
865}
866
867static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
868{
869 spin_lock(&sbi->stat_lock);
870 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
871 sbi->total_valid_inode_count++;
872 spin_unlock(&sbi->stat_lock);
873}
874
875static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
876{
877 spin_lock(&sbi->stat_lock);
878 f2fs_bug_on(!sbi->total_valid_inode_count);
879 sbi->total_valid_inode_count--;
880 spin_unlock(&sbi->stat_lock);
881}
882
883static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
884{
885 return sbi->total_valid_inode_count;
886}
887
888static inline void f2fs_put_page(struct page *page, int unlock)
889{
890 if (!page)
891 return;
892
893 if (unlock) {
894 f2fs_bug_on(!PageLocked(page));
895 unlock_page(page);
896 }
897 page_cache_release(page);
898}
899
900static inline void f2fs_put_dnode(struct dnode_of_data *dn)
901{
902 if (dn->node_page)
903 f2fs_put_page(dn->node_page, 1);
904 if (dn->inode_page && dn->node_page != dn->inode_page)
905 f2fs_put_page(dn->inode_page, 0);
906 dn->node_page = NULL;
907 dn->inode_page = NULL;
908}
909
910static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
911 size_t size)
912{
913 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
914}
915
916static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
917 gfp_t flags)
918{
919 void *entry;
920retry:
921 entry = kmem_cache_alloc(cachep, flags);
922 if (!entry) {
923 cond_resched();
924 goto retry;
925 }
926
927 return entry;
928}
929
930#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
931
932static inline bool IS_INODE(struct page *page)
933{
934 struct f2fs_node *p = F2FS_NODE(page);
935 return RAW_IS_INODE(p);
936}
937
938static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
939{
940 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
941}
942
943static inline block_t datablock_addr(struct page *node_page,
944 unsigned int offset)
945{
946 struct f2fs_node *raw_node;
947 __le32 *addr_array;
948 raw_node = F2FS_NODE(node_page);
949 addr_array = blkaddr_in_node(raw_node);
950 return le32_to_cpu(addr_array[offset]);
951}
952
953static inline int f2fs_test_bit(unsigned int nr, char *addr)
954{
955 int mask;
956
957 addr += (nr >> 3);
958 mask = 1 << (7 - (nr & 0x07));
959 return mask & *addr;
960}
961
962static inline int f2fs_set_bit(unsigned int nr, char *addr)
963{
964 int mask;
965 int ret;
966
967 addr += (nr >> 3);
968 mask = 1 << (7 - (nr & 0x07));
969 ret = mask & *addr;
970 *addr |= mask;
971 return ret;
972}
973
974static inline int f2fs_clear_bit(unsigned int nr, char *addr)
975{
976 int mask;
977 int ret;
978
979 addr += (nr >> 3);
980 mask = 1 << (7 - (nr & 0x07));
981 ret = mask & *addr;
982 *addr &= ~mask;
983 return ret;
984}
985
986
987enum {
988 FI_NEW_INODE,
989 FI_DIRTY_INODE,
990 FI_DIRTY_DIR,
991 FI_INC_LINK,
992 FI_ACL_MODE,
993 FI_NO_ALLOC,
994 FI_UPDATE_DIR,
995 FI_DELAY_IPUT,
996 FI_NO_EXTENT,
997 FI_INLINE_XATTR,
998 FI_INLINE_DATA,
999 FI_APPEND_WRITE,
1000 FI_UPDATE_WRITE,
1001 FI_NEED_IPU,
1002};
1003
1004static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
1005{
1006 if (!test_bit(flag, &fi->flags))
1007 set_bit(flag, &fi->flags);
1008}
1009
1010static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
1011{
1012 return test_bit(flag, &fi->flags);
1013}
1014
1015static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1016{
1017 if (test_bit(flag, &fi->flags))
1018 clear_bit(flag, &fi->flags);
1019}
1020
1021static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
1022{
1023 fi->i_acl_mode = mode;
1024 set_inode_flag(fi, FI_ACL_MODE);
1025}
1026
1027static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1028{
1029 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
1030 clear_inode_flag(fi, FI_ACL_MODE);
1031 return 1;
1032 }
1033 return 0;
1034}
1035
1036static inline void get_inline_info(struct f2fs_inode_info *fi,
1037 struct f2fs_inode *ri)
1038{
1039 if (ri->i_inline & F2FS_INLINE_XATTR)
1040 set_inode_flag(fi, FI_INLINE_XATTR);
1041 if (ri->i_inline & F2FS_INLINE_DATA)
1042 set_inode_flag(fi, FI_INLINE_DATA);
1043}
1044
1045static inline void set_raw_inline(struct f2fs_inode_info *fi,
1046 struct f2fs_inode *ri)
1047{
1048 ri->i_inline = 0;
1049
1050 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1051 ri->i_inline |= F2FS_INLINE_XATTR;
1052 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1053 ri->i_inline |= F2FS_INLINE_DATA;
1054}
1055
1056static inline int f2fs_has_inline_xattr(struct inode *inode)
1057{
1058 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1059}
1060
1061static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
1062{
1063 if (f2fs_has_inline_xattr(&fi->vfs_inode))
1064 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1065 return DEF_ADDRS_PER_INODE;
1066}
1067
1068static inline void *inline_xattr_addr(struct page *page)
1069{
1070 struct f2fs_inode *ri = F2FS_INODE(page);
1071 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1072 F2FS_INLINE_XATTR_ADDRS]);
1073}
1074
1075static inline int inline_xattr_size(struct inode *inode)
1076{
1077 if (f2fs_has_inline_xattr(inode))
1078 return F2FS_INLINE_XATTR_ADDRS << 2;
1079 else
1080 return 0;
1081}
1082
1083static inline int f2fs_has_inline_data(struct inode *inode)
1084{
1085 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1086}
1087
1088static inline void *inline_data_addr(struct page *page)
1089{
1090 struct f2fs_inode *ri = F2FS_INODE(page);
1091 return (void *)&(ri->i_addr[1]);
1092}
1093
1094static inline int f2fs_readonly(struct super_block *sb)
1095{
1096 return sb->s_flags & MS_RDONLY;
1097}
1098
1099static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
1100{
1101 return is_set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1102}
1103
1104static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1105{
1106 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1107 sbi->sb->s_flags |= MS_RDONLY;
1108}
1109
1110#define get_inode_mode(i) \
1111 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1112 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1113
1114
1115#define PGOFS_OF_NEXT_DNODE(pgofs, fi) \
1116 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \
1117 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \
1118 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi))
1119
1120
1121
1122
1123int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1124void truncate_data_blocks(struct dnode_of_data *);
1125int truncate_blocks(struct inode *, u64, bool);
1126void f2fs_truncate(struct inode *);
1127int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
1128int f2fs_setattr(struct dentry *, struct iattr *);
1129int truncate_hole(struct inode *, pgoff_t, pgoff_t);
1130int truncate_data_blocks_range(struct dnode_of_data *, int);
1131long f2fs_ioctl(struct file *, unsigned int, unsigned long);
1132long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
1133
1134
1135
1136
1137void f2fs_set_inode_flags(struct inode *);
1138struct inode *f2fs_iget(struct super_block *, unsigned long);
1139int try_to_free_nats(struct f2fs_sb_info *, int);
1140void update_inode(struct inode *, struct page *);
1141void update_inode_page(struct inode *);
1142int f2fs_write_inode(struct inode *, struct writeback_control *);
1143void f2fs_evict_inode(struct inode *);
1144
1145
1146
1147
1148struct dentry *f2fs_get_parent(struct dentry *child);
1149
1150
1151
1152
1153struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1154 struct page **);
1155struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1156ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1157void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1158 struct page *, struct inode *);
1159int update_dent_inode(struct inode *, const struct qstr *);
1160int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
1161void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1162int f2fs_do_tmpfile(struct inode *, struct inode *);
1163int f2fs_make_empty(struct inode *, struct inode *);
1164bool f2fs_empty_dir(struct inode *);
1165
1166static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1167{
1168 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1169 inode);
1170}
1171
1172
1173
1174
1175int f2fs_sync_fs(struct super_block *, int);
1176extern __printf(3, 4)
1177void f2fs_msg(struct super_block *, const char *, const char *, ...);
1178
1179
1180
1181
1182f2fs_hash_t f2fs_dentry_hash(const struct qstr *);
1183
1184
1185
1186
1187struct dnode_of_data;
1188struct node_info;
1189
1190bool available_free_memory(struct f2fs_sb_info *, int);
1191int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1192bool fsync_mark_done(struct f2fs_sb_info *, nid_t);
1193void fsync_mark_clear(struct f2fs_sb_info *, nid_t);
1194void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1195int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1196int truncate_inode_blocks(struct inode *, pgoff_t);
1197int truncate_xattr_node(struct inode *, struct page *);
1198int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1199void remove_inode_page(struct inode *);
1200struct page *new_inode_page(struct inode *);
1201struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1202void ra_node_page(struct f2fs_sb_info *, nid_t);
1203struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1204struct page *get_node_page_ra(struct page *, int);
1205void sync_inode_page(struct dnode_of_data *);
1206int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1207bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1208void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1209void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1210void recover_inline_xattr(struct inode *, struct page *);
1211void recover_xattr_data(struct inode *, struct page *, block_t);
1212int recover_inode_page(struct f2fs_sb_info *, struct page *);
1213int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1214 struct f2fs_summary_block *);
1215void flush_nat_entries(struct f2fs_sb_info *);
1216int build_node_manager(struct f2fs_sb_info *);
1217void destroy_node_manager(struct f2fs_sb_info *);
1218int __init create_node_manager_caches(void);
1219void destroy_node_manager_caches(void);
1220
1221
1222
1223
1224void f2fs_balance_fs(struct f2fs_sb_info *);
1225void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1226int f2fs_issue_flush(struct f2fs_sb_info *);
1227int create_flush_cmd_control(struct f2fs_sb_info *);
1228void destroy_flush_cmd_control(struct f2fs_sb_info *);
1229void invalidate_blocks(struct f2fs_sb_info *, block_t);
1230void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
1231void clear_prefree_segments(struct f2fs_sb_info *);
1232void discard_next_dnode(struct f2fs_sb_info *, block_t);
1233int npages_for_summary_flush(struct f2fs_sb_info *);
1234void allocate_new_segments(struct f2fs_sb_info *);
1235struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1236void write_meta_page(struct f2fs_sb_info *, struct page *);
1237void write_node_page(struct f2fs_sb_info *, struct page *,
1238 struct f2fs_io_info *, unsigned int, block_t, block_t *);
1239void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1240 struct f2fs_io_info *);
1241void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
1242void recover_data_page(struct f2fs_sb_info *, struct page *,
1243 struct f2fs_summary *, block_t, block_t);
1244void allocate_data_block(struct f2fs_sb_info *, struct page *,
1245 block_t, block_t *, struct f2fs_summary *, int);
1246void f2fs_wait_on_page_writeback(struct page *, enum page_type);
1247void write_data_summaries(struct f2fs_sb_info *, block_t);
1248void write_node_summaries(struct f2fs_sb_info *, block_t);
1249int lookup_journal_in_cursum(struct f2fs_summary_block *,
1250 int, unsigned int, int);
1251void flush_sit_entries(struct f2fs_sb_info *);
1252int build_segment_manager(struct f2fs_sb_info *);
1253void destroy_segment_manager(struct f2fs_sb_info *);
1254int __init create_segment_manager_caches(void);
1255void destroy_segment_manager_caches(void);
1256
1257
1258
1259
1260struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1261struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1262int ra_meta_pages(struct f2fs_sb_info *, int, int, int);
1263long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1264void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
1265void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
1266void release_dirty_inode(struct f2fs_sb_info *);
1267bool exist_written_data(struct f2fs_sb_info *, nid_t, int);
1268int acquire_orphan_inode(struct f2fs_sb_info *);
1269void release_orphan_inode(struct f2fs_sb_info *);
1270void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1271void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1272void recover_orphan_inodes(struct f2fs_sb_info *);
1273int get_valid_checkpoint(struct f2fs_sb_info *);
1274void set_dirty_dir_page(struct inode *, struct page *);
1275void add_dirty_dir_inode(struct inode *);
1276void remove_dirty_dir_inode(struct inode *);
1277void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1278void write_checkpoint(struct f2fs_sb_info *, bool);
1279void init_ino_entry_info(struct f2fs_sb_info *);
1280int __init create_checkpoint_caches(void);
1281void destroy_checkpoint_caches(void);
1282
1283
1284
1285
1286void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
1287int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1288void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
1289 struct f2fs_io_info *);
1290int reserve_new_block(struct dnode_of_data *);
1291int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
1292void update_extent_cache(block_t, struct dnode_of_data *);
1293struct page *find_data_page(struct inode *, pgoff_t, bool);
1294struct page *get_lock_data_page(struct inode *, pgoff_t);
1295struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1296int do_write_data_page(struct page *, struct f2fs_io_info *);
1297int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
1298
1299
1300
1301
1302int start_gc_thread(struct f2fs_sb_info *);
1303void stop_gc_thread(struct f2fs_sb_info *);
1304block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
1305int f2fs_gc(struct f2fs_sb_info *);
1306void build_gc_manager(struct f2fs_sb_info *);
1307int __init create_gc_caches(void);
1308void destroy_gc_caches(void);
1309
1310
1311
1312
1313int recover_fsync_data(struct f2fs_sb_info *);
1314bool space_for_roll_forward(struct f2fs_sb_info *);
1315
1316
1317
1318
1319#ifdef CONFIG_F2FS_STAT_FS
1320struct f2fs_stat_info {
1321 struct list_head stat_list;
1322 struct f2fs_sb_info *sbi;
1323 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1324 int main_area_segs, main_area_sections, main_area_zones;
1325 int hit_ext, total_ext;
1326 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1327 int nats, sits, fnids;
1328 int total_count, utilization;
1329 int bg_gc, inline_inode;
1330 unsigned int valid_count, valid_node_count, valid_inode_count;
1331 unsigned int bimodal, avg_vblocks;
1332 int util_free, util_valid, util_invalid;
1333 int rsvd_segs, overp_segs;
1334 int dirty_count, node_pages, meta_pages;
1335 int prefree_count, call_count, cp_count;
1336 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1337 int tot_blks, data_blks, node_blks;
1338 int curseg[NR_CURSEG_TYPE];
1339 int cursec[NR_CURSEG_TYPE];
1340 int curzone[NR_CURSEG_TYPE];
1341
1342 unsigned int segment_count[2];
1343 unsigned int block_count[2];
1344 unsigned base_mem, cache_mem;
1345};
1346
1347static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1348{
1349 return (struct f2fs_stat_info *)sbi->stat_info;
1350}
1351
1352#define stat_inc_cp_count(si) ((si)->cp_count++)
1353#define stat_inc_call_count(si) ((si)->call_count++)
1354#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1355#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1356#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1357#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1358#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1359#define stat_inc_inline_inode(inode) \
1360 do { \
1361 if (f2fs_has_inline_data(inode)) \
1362 ((F2FS_SB(inode->i_sb))->inline_inode++); \
1363 } while (0)
1364#define stat_dec_inline_inode(inode) \
1365 do { \
1366 if (f2fs_has_inline_data(inode)) \
1367 ((F2FS_SB(inode->i_sb))->inline_inode--); \
1368 } while (0)
1369
1370#define stat_inc_seg_type(sbi, curseg) \
1371 ((sbi)->segment_count[(curseg)->alloc_type]++)
1372#define stat_inc_block_count(sbi, curseg) \
1373 ((sbi)->block_count[(curseg)->alloc_type]++)
1374
1375#define stat_inc_seg_count(sbi, type) \
1376 do { \
1377 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1378 (si)->tot_segs++; \
1379 if (type == SUM_TYPE_DATA) \
1380 si->data_segs++; \
1381 else \
1382 si->node_segs++; \
1383 } while (0)
1384
1385#define stat_inc_tot_blk_count(si, blks) \
1386 (si->tot_blks += (blks))
1387
1388#define stat_inc_data_blk_count(sbi, blks) \
1389 do { \
1390 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1391 stat_inc_tot_blk_count(si, blks); \
1392 si->data_blks += (blks); \
1393 } while (0)
1394
1395#define stat_inc_node_blk_count(sbi, blks) \
1396 do { \
1397 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1398 stat_inc_tot_blk_count(si, blks); \
1399 si->node_blks += (blks); \
1400 } while (0)
1401
1402int f2fs_build_stats(struct f2fs_sb_info *);
1403void f2fs_destroy_stats(struct f2fs_sb_info *);
1404void __init f2fs_create_root_stats(void);
1405void f2fs_destroy_root_stats(void);
1406#else
1407#define stat_inc_cp_count(si)
1408#define stat_inc_call_count(si)
1409#define stat_inc_bggc_count(si)
1410#define stat_inc_dirty_dir(sbi)
1411#define stat_dec_dirty_dir(sbi)
1412#define stat_inc_total_hit(sb)
1413#define stat_inc_read_hit(sb)
1414#define stat_inc_inline_inode(inode)
1415#define stat_dec_inline_inode(inode)
1416#define stat_inc_seg_type(sbi, curseg)
1417#define stat_inc_block_count(sbi, curseg)
1418#define stat_inc_seg_count(si, type)
1419#define stat_inc_tot_blk_count(si, blks)
1420#define stat_inc_data_blk_count(si, blks)
1421#define stat_inc_node_blk_count(sbi, blks)
1422
1423static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1424static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1425static inline void __init f2fs_create_root_stats(void) { }
1426static inline void f2fs_destroy_root_stats(void) { }
1427#endif
1428
1429extern const struct file_operations f2fs_dir_operations;
1430extern const struct file_operations f2fs_file_operations;
1431extern const struct inode_operations f2fs_file_inode_operations;
1432extern const struct address_space_operations f2fs_dblock_aops;
1433extern const struct address_space_operations f2fs_node_aops;
1434extern const struct address_space_operations f2fs_meta_aops;
1435extern const struct inode_operations f2fs_dir_inode_operations;
1436extern const struct inode_operations f2fs_symlink_inode_operations;
1437extern const struct inode_operations f2fs_special_inode_operations;
1438
1439
1440
1441
1442bool f2fs_may_inline(struct inode *);
1443int f2fs_read_inline_data(struct inode *, struct page *);
1444int f2fs_convert_inline_data(struct inode *, pgoff_t, struct page *);
1445int f2fs_write_inline_data(struct inode *, struct page *, unsigned int);
1446void truncate_inline_data(struct inode *, u64);
1447bool recover_inline_data(struct inode *, struct page *);
1448#endif
1449