Loading...
Note: File does not exist in v3.5.6.
1/*
2 * fs/f2fs/f2fs.h
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
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)
28#define f2fs_down_write(x, y) down_write(x)
29#endif
30
31/*
32 * For mount options
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
45#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
46#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
47#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
48
49#define ver_after(a, b) (typecheck(unsigned long long, a) && \
50 typecheck(unsigned long long, b) && \
51 ((long long)((a) - (b)) > 0))
52
53typedef u32 block_t; /*
54 * should not change u32, since it is the on-disk block
55 * address format, __le32.
56 */
57typedef u32 nid_t;
58
59struct f2fs_mount_info {
60 unsigned int opt;
61};
62
63#define CRCPOLY_LE 0xedb88320
64
65static inline __u32 f2fs_crc32(void *buf, size_t len)
66{
67 unsigned char *p = (unsigned char *)buf;
68 __u32 crc = F2FS_SUPER_MAGIC;
69 int i;
70
71 while (len--) {
72 crc ^= *p++;
73 for (i = 0; i < 8; i++)
74 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
75 }
76 return crc;
77}
78
79static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
80{
81 return f2fs_crc32(buf, buf_size) == blk_crc;
82}
83
84/*
85 * For checkpoint manager
86 */
87enum {
88 NAT_BITMAP,
89 SIT_BITMAP
90};
91
92/*
93 * For CP/NAT/SIT/SSA readahead
94 */
95enum {
96 META_CP,
97 META_NAT,
98 META_SIT,
99 META_SSA
100};
101
102/* for the list of orphan inodes */
103struct orphan_inode_entry {
104 struct list_head list; /* list head */
105 nid_t ino; /* inode number */
106};
107
108/* for the list of directory inodes */
109struct dir_inode_entry {
110 struct list_head list; /* list head */
111 struct inode *inode; /* vfs inode pointer */
112};
113
114/* for the list of blockaddresses to be discarded */
115struct discard_entry {
116 struct list_head list; /* list head */
117 block_t blkaddr; /* block address to be discarded */
118 int len; /* # of consecutive blocks of the discard */
119};
120
121/* for the list of fsync inodes, used only during recovery */
122struct fsync_inode_entry {
123 struct list_head list; /* list head */
124 struct inode *inode; /* vfs inode pointer */
125 block_t blkaddr; /* block address locating the last inode */
126};
127
128#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
129#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
130
131#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
132#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
133#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
134#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
135
136static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
137{
138 int before = nats_in_cursum(rs);
139 rs->n_nats = cpu_to_le16(before + i);
140 return before;
141}
142
143static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
144{
145 int before = sits_in_cursum(rs);
146 rs->n_sits = cpu_to_le16(before + i);
147 return before;
148}
149
150/*
151 * ioctl commands
152 */
153#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
154#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
155
156#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
157/*
158 * ioctl commands in 32 bit emulation
159 */
160#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
161#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
162#endif
163
164/*
165 * For INODE and NODE manager
166 */
167/*
168 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
169 * as its node offset to distinguish from index node blocks.
170 * But some bits are used to mark the node block.
171 */
172#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
173 >> OFFSET_BIT_SHIFT)
174enum {
175 ALLOC_NODE, /* allocate a new node page if needed */
176 LOOKUP_NODE, /* look up a node without readahead */
177 LOOKUP_NODE_RA, /*
178 * look up a node with readahead called
179 * by get_data_block.
180 */
181};
182
183#define F2FS_LINK_MAX 32000 /* maximum link count per file */
184
185/* for in-memory extent cache entry */
186#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
187
188struct extent_info {
189 rwlock_t ext_lock; /* rwlock for consistency */
190 unsigned int fofs; /* start offset in a file */
191 u32 blk_addr; /* start block address of the extent */
192 unsigned int len; /* length of the extent */
193};
194
195/*
196 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
197 */
198#define FADVISE_COLD_BIT 0x01
199#define FADVISE_LOST_PINO_BIT 0x02
200
201#define DEF_DIR_LEVEL 0
202
203struct f2fs_inode_info {
204 struct inode vfs_inode; /* serve a vfs inode */
205 unsigned long i_flags; /* keep an inode flags for ioctl */
206 unsigned char i_advise; /* use to give file attribute hints */
207 unsigned char i_dir_level; /* use for dentry level for large dir */
208 unsigned int i_current_depth; /* use only in directory structure */
209 unsigned int i_pino; /* parent inode number */
210 umode_t i_acl_mode; /* keep file acl mode temporarily */
211
212 /* Use below internally in f2fs*/
213 unsigned long flags; /* use to pass per-file flags */
214 struct rw_semaphore i_sem; /* protect fi info */
215 atomic_t dirty_dents; /* # of dirty dentry pages */
216 f2fs_hash_t chash; /* hash value of given file name */
217 unsigned int clevel; /* maximum level of given file name */
218 nid_t i_xattr_nid; /* node id that contains xattrs */
219 unsigned long long xattr_ver; /* cp version of xattr modification */
220 struct extent_info ext; /* in-memory extent cache entry */
221};
222
223static inline void get_extent_info(struct extent_info *ext,
224 struct f2fs_extent i_ext)
225{
226 write_lock(&ext->ext_lock);
227 ext->fofs = le32_to_cpu(i_ext.fofs);
228 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
229 ext->len = le32_to_cpu(i_ext.len);
230 write_unlock(&ext->ext_lock);
231}
232
233static inline void set_raw_extent(struct extent_info *ext,
234 struct f2fs_extent *i_ext)
235{
236 read_lock(&ext->ext_lock);
237 i_ext->fofs = cpu_to_le32(ext->fofs);
238 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
239 i_ext->len = cpu_to_le32(ext->len);
240 read_unlock(&ext->ext_lock);
241}
242
243struct f2fs_nm_info {
244 block_t nat_blkaddr; /* base disk address of NAT */
245 nid_t max_nid; /* maximum possible node ids */
246 nid_t next_scan_nid; /* the next nid to be scanned */
247 unsigned int ram_thresh; /* control the memory footprint */
248
249 /* NAT cache management */
250 struct radix_tree_root nat_root;/* root of the nat entry cache */
251 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
252 unsigned int nat_cnt; /* the # of cached nat entries */
253 struct list_head nat_entries; /* cached nat entry list (clean) */
254 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
255
256 /* free node ids management */
257 struct radix_tree_root free_nid_root;/* root of the free_nid cache */
258 struct list_head free_nid_list; /* a list for free nids */
259 spinlock_t free_nid_list_lock; /* protect free nid list */
260 unsigned int fcnt; /* the number of free node id */
261 struct mutex build_lock; /* lock for build free nids */
262
263 /* for checkpoint */
264 char *nat_bitmap; /* NAT bitmap pointer */
265 int bitmap_size; /* bitmap size */
266};
267
268/*
269 * this structure is used as one of function parameters.
270 * all the information are dedicated to a given direct node block determined
271 * by the data offset in a file.
272 */
273struct dnode_of_data {
274 struct inode *inode; /* vfs inode pointer */
275 struct page *inode_page; /* its inode page, NULL is possible */
276 struct page *node_page; /* cached direct node page */
277 nid_t nid; /* node id of the direct node block */
278 unsigned int ofs_in_node; /* data offset in the node page */
279 bool inode_page_locked; /* inode page is locked or not */
280 block_t data_blkaddr; /* block address of the node block */
281};
282
283static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
284 struct page *ipage, struct page *npage, nid_t nid)
285{
286 memset(dn, 0, sizeof(*dn));
287 dn->inode = inode;
288 dn->inode_page = ipage;
289 dn->node_page = npage;
290 dn->nid = nid;
291}
292
293/*
294 * For SIT manager
295 *
296 * By default, there are 6 active log areas across the whole main area.
297 * When considering hot and cold data separation to reduce cleaning overhead,
298 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
299 * respectively.
300 * In the current design, you should not change the numbers intentionally.
301 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
302 * logs individually according to the underlying devices. (default: 6)
303 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
304 * data and 8 for node logs.
305 */
306#define NR_CURSEG_DATA_TYPE (3)
307#define NR_CURSEG_NODE_TYPE (3)
308#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
309
310enum {
311 CURSEG_HOT_DATA = 0, /* directory entry blocks */
312 CURSEG_WARM_DATA, /* data blocks */
313 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
314 CURSEG_HOT_NODE, /* direct node blocks of directory files */
315 CURSEG_WARM_NODE, /* direct node blocks of normal files */
316 CURSEG_COLD_NODE, /* indirect node blocks */
317 NO_CHECK_TYPE
318};
319
320struct flush_cmd {
321 struct flush_cmd *next;
322 struct completion wait;
323 int ret;
324};
325
326struct f2fs_sm_info {
327 struct sit_info *sit_info; /* whole segment information */
328 struct free_segmap_info *free_info; /* free segment information */
329 struct dirty_seglist_info *dirty_info; /* dirty segment information */
330 struct curseg_info *curseg_array; /* active segment information */
331
332 struct list_head wblist_head; /* list of under-writeback pages */
333 spinlock_t wblist_lock; /* lock for checkpoint */
334
335 block_t seg0_blkaddr; /* block address of 0'th segment */
336 block_t main_blkaddr; /* start block address of main area */
337 block_t ssa_blkaddr; /* start block address of SSA area */
338
339 unsigned int segment_count; /* total # of segments */
340 unsigned int main_segments; /* # of segments in main area */
341 unsigned int reserved_segments; /* # of reserved segments */
342 unsigned int ovp_segments; /* # of overprovision segments */
343
344 /* a threshold to reclaim prefree segments */
345 unsigned int rec_prefree_segments;
346
347 /* for small discard management */
348 struct list_head discard_list; /* 4KB discard list */
349 int nr_discards; /* # of discards in the list */
350 int max_discards; /* max. discards to be issued */
351
352 unsigned int ipu_policy; /* in-place-update policy */
353 unsigned int min_ipu_util; /* in-place-update threshold */
354
355 /* for flush command control */
356 struct task_struct *f2fs_issue_flush; /* flush thread */
357 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
358 struct flush_cmd *issue_list; /* list for command issue */
359 struct flush_cmd *dispatch_list; /* list for command dispatch */
360 spinlock_t issue_lock; /* for issue list lock */
361 struct flush_cmd *issue_tail; /* list tail of issue list */
362};
363
364/*
365 * For superblock
366 */
367/*
368 * COUNT_TYPE for monitoring
369 *
370 * f2fs monitors the number of several block types such as on-writeback,
371 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
372 */
373enum count_type {
374 F2FS_WRITEBACK,
375 F2FS_DIRTY_DENTS,
376 F2FS_DIRTY_NODES,
377 F2FS_DIRTY_META,
378 NR_COUNT_TYPE,
379};
380
381/*
382 * The below are the page types of bios used in submti_bio().
383 * The available types are:
384 * DATA User data pages. It operates as async mode.
385 * NODE Node pages. It operates as async mode.
386 * META FS metadata pages such as SIT, NAT, CP.
387 * NR_PAGE_TYPE The number of page types.
388 * META_FLUSH Make sure the previous pages are written
389 * with waiting the bio's completion
390 * ... Only can be used with META.
391 */
392#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
393enum page_type {
394 DATA,
395 NODE,
396 META,
397 NR_PAGE_TYPE,
398 META_FLUSH,
399};
400
401struct f2fs_io_info {
402 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
403 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
404};
405
406#define is_read_io(rw) (((rw) & 1) == READ)
407struct f2fs_bio_info {
408 struct f2fs_sb_info *sbi; /* f2fs superblock */
409 struct bio *bio; /* bios to merge */
410 sector_t last_block_in_bio; /* last block number */
411 struct f2fs_io_info fio; /* store buffered io info. */
412 struct rw_semaphore io_rwsem; /* blocking op for bio */
413};
414
415struct f2fs_sb_info {
416 struct super_block *sb; /* pointer to VFS super block */
417 struct proc_dir_entry *s_proc; /* proc entry */
418 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
419 struct f2fs_super_block *raw_super; /* raw super block pointer */
420 int s_dirty; /* dirty flag for checkpoint */
421
422 /* for node-related operations */
423 struct f2fs_nm_info *nm_info; /* node manager */
424 struct inode *node_inode; /* cache node blocks */
425
426 /* for segment-related operations */
427 struct f2fs_sm_info *sm_info; /* segment manager */
428
429 /* for bio operations */
430 struct f2fs_bio_info read_io; /* for read bios */
431 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
432 struct completion *wait_io; /* for completion bios */
433
434 /* for checkpoint */
435 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
436 struct inode *meta_inode; /* cache meta blocks */
437 struct mutex cp_mutex; /* checkpoint procedure lock */
438 struct rw_semaphore cp_rwsem; /* blocking FS operations */
439 struct mutex node_write; /* locking node writes */
440 struct mutex writepages; /* mutex for writepages() */
441 bool por_doing; /* recovery is doing or not */
442 wait_queue_head_t cp_wait;
443
444 /* for orphan inode management */
445 struct list_head orphan_inode_list; /* orphan inode list */
446 spinlock_t orphan_inode_lock; /* for orphan inode list */
447 unsigned int n_orphans; /* # of orphan inodes */
448 unsigned int max_orphans; /* max orphan inodes */
449
450 /* for directory inode management */
451 struct list_head dir_inode_list; /* dir inode list */
452 spinlock_t dir_inode_lock; /* for dir inode list lock */
453
454 /* basic file system units */
455 unsigned int log_sectors_per_block; /* log2 sectors per block */
456 unsigned int log_blocksize; /* log2 block size */
457 unsigned int blocksize; /* block size */
458 unsigned int root_ino_num; /* root inode number*/
459 unsigned int node_ino_num; /* node inode number*/
460 unsigned int meta_ino_num; /* meta inode number*/
461 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
462 unsigned int blocks_per_seg; /* blocks per segment */
463 unsigned int segs_per_sec; /* segments per section */
464 unsigned int secs_per_zone; /* sections per zone */
465 unsigned int total_sections; /* total section count */
466 unsigned int total_node_count; /* total node block count */
467 unsigned int total_valid_node_count; /* valid node block count */
468 unsigned int total_valid_inode_count; /* valid inode count */
469 int active_logs; /* # of active logs */
470 int dir_level; /* directory level */
471
472 block_t user_block_count; /* # of user blocks */
473 block_t total_valid_block_count; /* # of valid blocks */
474 block_t alloc_valid_block_count; /* # of allocated blocks */
475 block_t last_valid_block_count; /* for recovery */
476 u32 s_next_generation; /* for NFS support */
477 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
478
479 struct f2fs_mount_info mount_opt; /* mount options */
480
481 /* for cleaning operations */
482 struct mutex gc_mutex; /* mutex for GC */
483 struct f2fs_gc_kthread *gc_thread; /* GC thread */
484 unsigned int cur_victim_sec; /* current victim section num */
485
486 /* maximum # of trials to find a victim segment for SSR and GC */
487 unsigned int max_victim_search;
488
489 /*
490 * for stat information.
491 * one is for the LFS mode, and the other is for the SSR mode.
492 */
493#ifdef CONFIG_F2FS_STAT_FS
494 struct f2fs_stat_info *stat_info; /* FS status information */
495 unsigned int segment_count[2]; /* # of allocated segments */
496 unsigned int block_count[2]; /* # of allocated blocks */
497 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
498 int inline_inode; /* # of inline_data inodes */
499 int bg_gc; /* background gc calls */
500 unsigned int n_dirty_dirs; /* # of dir inodes */
501#endif
502 unsigned int last_victim[2]; /* last victim segment # */
503 spinlock_t stat_lock; /* lock for stat operations */
504
505 /* For sysfs suppport */
506 struct kobject s_kobj;
507 struct completion s_kobj_unregister;
508};
509
510/*
511 * Inline functions
512 */
513static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
514{
515 return container_of(inode, struct f2fs_inode_info, vfs_inode);
516}
517
518static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
519{
520 return sb->s_fs_info;
521}
522
523static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
524{
525 return (struct f2fs_super_block *)(sbi->raw_super);
526}
527
528static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
529{
530 return (struct f2fs_checkpoint *)(sbi->ckpt);
531}
532
533static inline struct f2fs_node *F2FS_NODE(struct page *page)
534{
535 return (struct f2fs_node *)page_address(page);
536}
537
538static inline struct f2fs_inode *F2FS_INODE(struct page *page)
539{
540 return &((struct f2fs_node *)page_address(page))->i;
541}
542
543static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
544{
545 return (struct f2fs_nm_info *)(sbi->nm_info);
546}
547
548static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
549{
550 return (struct f2fs_sm_info *)(sbi->sm_info);
551}
552
553static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
554{
555 return (struct sit_info *)(SM_I(sbi)->sit_info);
556}
557
558static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
559{
560 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
561}
562
563static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
564{
565 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
566}
567
568static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
569{
570 return sbi->meta_inode->i_mapping;
571}
572
573static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
574{
575 return sbi->node_inode->i_mapping;
576}
577
578static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
579{
580 sbi->s_dirty = 1;
581}
582
583static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
584{
585 sbi->s_dirty = 0;
586}
587
588static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
589{
590 return le64_to_cpu(cp->checkpoint_ver);
591}
592
593static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
594{
595 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
596 return ckpt_flags & f;
597}
598
599static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
600{
601 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
602 ckpt_flags |= f;
603 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
604}
605
606static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
607{
608 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
609 ckpt_flags &= (~f);
610 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
611}
612
613static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
614{
615 down_read(&sbi->cp_rwsem);
616}
617
618static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
619{
620 up_read(&sbi->cp_rwsem);
621}
622
623static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
624{
625 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
626}
627
628static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
629{
630 up_write(&sbi->cp_rwsem);
631}
632
633/*
634 * Check whether the given nid is within node id range.
635 */
636static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
637{
638 WARN_ON((nid >= NM_I(sbi)->max_nid));
639 if (unlikely(nid >= NM_I(sbi)->max_nid))
640 return -EINVAL;
641 return 0;
642}
643
644#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
645
646/*
647 * Check whether the inode has blocks or not
648 */
649static inline int F2FS_HAS_BLOCKS(struct inode *inode)
650{
651 if (F2FS_I(inode)->i_xattr_nid)
652 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
653 else
654 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
655}
656
657static inline bool f2fs_has_xattr_block(unsigned int ofs)
658{
659 return ofs == XATTR_NODE_OFFSET;
660}
661
662static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
663 struct inode *inode, blkcnt_t count)
664{
665 block_t valid_block_count;
666
667 spin_lock(&sbi->stat_lock);
668 valid_block_count =
669 sbi->total_valid_block_count + (block_t)count;
670 if (unlikely(valid_block_count > sbi->user_block_count)) {
671 spin_unlock(&sbi->stat_lock);
672 return false;
673 }
674 inode->i_blocks += count;
675 sbi->total_valid_block_count = valid_block_count;
676 sbi->alloc_valid_block_count += (block_t)count;
677 spin_unlock(&sbi->stat_lock);
678 return true;
679}
680
681static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
682 struct inode *inode,
683 blkcnt_t count)
684{
685 spin_lock(&sbi->stat_lock);
686 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
687 f2fs_bug_on(inode->i_blocks < count);
688 inode->i_blocks -= count;
689 sbi->total_valid_block_count -= (block_t)count;
690 spin_unlock(&sbi->stat_lock);
691}
692
693static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
694{
695 atomic_inc(&sbi->nr_pages[count_type]);
696 F2FS_SET_SB_DIRT(sbi);
697}
698
699static inline void inode_inc_dirty_dents(struct inode *inode)
700{
701 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
702 atomic_inc(&F2FS_I(inode)->dirty_dents);
703}
704
705static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
706{
707 atomic_dec(&sbi->nr_pages[count_type]);
708}
709
710static inline void inode_dec_dirty_dents(struct inode *inode)
711{
712 if (!S_ISDIR(inode->i_mode))
713 return;
714
715 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
716 atomic_dec(&F2FS_I(inode)->dirty_dents);
717}
718
719static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
720{
721 return atomic_read(&sbi->nr_pages[count_type]);
722}
723
724static inline int get_dirty_dents(struct inode *inode)
725{
726 return atomic_read(&F2FS_I(inode)->dirty_dents);
727}
728
729static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
730{
731 unsigned int pages_per_sec = sbi->segs_per_sec *
732 (1 << sbi->log_blocks_per_seg);
733 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
734 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
735}
736
737static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
738{
739 return sbi->total_valid_block_count;
740}
741
742static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
743{
744 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
745
746 /* return NAT or SIT bitmap */
747 if (flag == NAT_BITMAP)
748 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
749 else if (flag == SIT_BITMAP)
750 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
751
752 return 0;
753}
754
755static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
756{
757 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
758 int offset = (flag == NAT_BITMAP) ?
759 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
760 return &ckpt->sit_nat_version_bitmap + offset;
761}
762
763static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
764{
765 block_t start_addr;
766 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
767 unsigned long long ckpt_version = cur_cp_version(ckpt);
768
769 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
770
771 /*
772 * odd numbered checkpoint should at cp segment 0
773 * and even segent must be at cp segment 1
774 */
775 if (!(ckpt_version & 1))
776 start_addr += sbi->blocks_per_seg;
777
778 return start_addr;
779}
780
781static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
782{
783 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
784}
785
786static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
787 struct inode *inode)
788{
789 block_t valid_block_count;
790 unsigned int valid_node_count;
791
792 spin_lock(&sbi->stat_lock);
793
794 valid_block_count = sbi->total_valid_block_count + 1;
795 if (unlikely(valid_block_count > sbi->user_block_count)) {
796 spin_unlock(&sbi->stat_lock);
797 return false;
798 }
799
800 valid_node_count = sbi->total_valid_node_count + 1;
801 if (unlikely(valid_node_count > sbi->total_node_count)) {
802 spin_unlock(&sbi->stat_lock);
803 return false;
804 }
805
806 if (inode)
807 inode->i_blocks++;
808
809 sbi->alloc_valid_block_count++;
810 sbi->total_valid_node_count++;
811 sbi->total_valid_block_count++;
812 spin_unlock(&sbi->stat_lock);
813
814 return true;
815}
816
817static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
818 struct inode *inode)
819{
820 spin_lock(&sbi->stat_lock);
821
822 f2fs_bug_on(!sbi->total_valid_block_count);
823 f2fs_bug_on(!sbi->total_valid_node_count);
824 f2fs_bug_on(!inode->i_blocks);
825
826 inode->i_blocks--;
827 sbi->total_valid_node_count--;
828 sbi->total_valid_block_count--;
829
830 spin_unlock(&sbi->stat_lock);
831}
832
833static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
834{
835 return sbi->total_valid_node_count;
836}
837
838static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
839{
840 spin_lock(&sbi->stat_lock);
841 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
842 sbi->total_valid_inode_count++;
843 spin_unlock(&sbi->stat_lock);
844}
845
846static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
847{
848 spin_lock(&sbi->stat_lock);
849 f2fs_bug_on(!sbi->total_valid_inode_count);
850 sbi->total_valid_inode_count--;
851 spin_unlock(&sbi->stat_lock);
852}
853
854static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
855{
856 return sbi->total_valid_inode_count;
857}
858
859static inline void f2fs_put_page(struct page *page, int unlock)
860{
861 if (!page)
862 return;
863
864 if (unlock) {
865 f2fs_bug_on(!PageLocked(page));
866 unlock_page(page);
867 }
868 page_cache_release(page);
869}
870
871static inline void f2fs_put_dnode(struct dnode_of_data *dn)
872{
873 if (dn->node_page)
874 f2fs_put_page(dn->node_page, 1);
875 if (dn->inode_page && dn->node_page != dn->inode_page)
876 f2fs_put_page(dn->inode_page, 0);
877 dn->node_page = NULL;
878 dn->inode_page = NULL;
879}
880
881static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
882 size_t size)
883{
884 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
885}
886
887static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
888 gfp_t flags)
889{
890 void *entry;
891retry:
892 entry = kmem_cache_alloc(cachep, flags);
893 if (!entry) {
894 cond_resched();
895 goto retry;
896 }
897
898 return entry;
899}
900
901#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
902
903static inline bool IS_INODE(struct page *page)
904{
905 struct f2fs_node *p = F2FS_NODE(page);
906 return RAW_IS_INODE(p);
907}
908
909static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
910{
911 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
912}
913
914static inline block_t datablock_addr(struct page *node_page,
915 unsigned int offset)
916{
917 struct f2fs_node *raw_node;
918 __le32 *addr_array;
919 raw_node = F2FS_NODE(node_page);
920 addr_array = blkaddr_in_node(raw_node);
921 return le32_to_cpu(addr_array[offset]);
922}
923
924static inline int f2fs_test_bit(unsigned int nr, char *addr)
925{
926 int mask;
927
928 addr += (nr >> 3);
929 mask = 1 << (7 - (nr & 0x07));
930 return mask & *addr;
931}
932
933static inline int f2fs_set_bit(unsigned int nr, char *addr)
934{
935 int mask;
936 int ret;
937
938 addr += (nr >> 3);
939 mask = 1 << (7 - (nr & 0x07));
940 ret = mask & *addr;
941 *addr |= mask;
942 return ret;
943}
944
945static inline int f2fs_clear_bit(unsigned int nr, char *addr)
946{
947 int mask;
948 int ret;
949
950 addr += (nr >> 3);
951 mask = 1 << (7 - (nr & 0x07));
952 ret = mask & *addr;
953 *addr &= ~mask;
954 return ret;
955}
956
957/* used for f2fs_inode_info->flags */
958enum {
959 FI_NEW_INODE, /* indicate newly allocated inode */
960 FI_DIRTY_INODE, /* indicate inode is dirty or not */
961 FI_INC_LINK, /* need to increment i_nlink */
962 FI_ACL_MODE, /* indicate acl mode */
963 FI_NO_ALLOC, /* should not allocate any blocks */
964 FI_UPDATE_DIR, /* should update inode block for consistency */
965 FI_DELAY_IPUT, /* used for the recovery */
966 FI_NO_EXTENT, /* not to use the extent cache */
967 FI_INLINE_XATTR, /* used for inline xattr */
968 FI_INLINE_DATA, /* used for inline data*/
969};
970
971static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
972{
973 set_bit(flag, &fi->flags);
974}
975
976static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
977{
978 return test_bit(flag, &fi->flags);
979}
980
981static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
982{
983 clear_bit(flag, &fi->flags);
984}
985
986static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
987{
988 fi->i_acl_mode = mode;
989 set_inode_flag(fi, FI_ACL_MODE);
990}
991
992static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
993{
994 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
995 clear_inode_flag(fi, FI_ACL_MODE);
996 return 1;
997 }
998 return 0;
999}
1000
1001static inline void get_inline_info(struct f2fs_inode_info *fi,
1002 struct f2fs_inode *ri)
1003{
1004 if (ri->i_inline & F2FS_INLINE_XATTR)
1005 set_inode_flag(fi, FI_INLINE_XATTR);
1006 if (ri->i_inline & F2FS_INLINE_DATA)
1007 set_inode_flag(fi, FI_INLINE_DATA);
1008}
1009
1010static inline void set_raw_inline(struct f2fs_inode_info *fi,
1011 struct f2fs_inode *ri)
1012{
1013 ri->i_inline = 0;
1014
1015 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1016 ri->i_inline |= F2FS_INLINE_XATTR;
1017 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1018 ri->i_inline |= F2FS_INLINE_DATA;
1019}
1020
1021static inline int f2fs_has_inline_xattr(struct inode *inode)
1022{
1023 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1024}
1025
1026static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
1027{
1028 if (f2fs_has_inline_xattr(&fi->vfs_inode))
1029 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1030 return DEF_ADDRS_PER_INODE;
1031}
1032
1033static inline void *inline_xattr_addr(struct page *page)
1034{
1035 struct f2fs_inode *ri = F2FS_INODE(page);
1036 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1037 F2FS_INLINE_XATTR_ADDRS]);
1038}
1039
1040static inline int inline_xattr_size(struct inode *inode)
1041{
1042 if (f2fs_has_inline_xattr(inode))
1043 return F2FS_INLINE_XATTR_ADDRS << 2;
1044 else
1045 return 0;
1046}
1047
1048static inline int f2fs_has_inline_data(struct inode *inode)
1049{
1050 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1051}
1052
1053static inline void *inline_data_addr(struct page *page)
1054{
1055 struct f2fs_inode *ri = F2FS_INODE(page);
1056 return (void *)&(ri->i_addr[1]);
1057}
1058
1059static inline int f2fs_readonly(struct super_block *sb)
1060{
1061 return sb->s_flags & MS_RDONLY;
1062}
1063
1064static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1065{
1066 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1067 sbi->sb->s_flags |= MS_RDONLY;
1068}
1069
1070#define get_inode_mode(i) \
1071 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1072 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1073
1074/*
1075 * file.c
1076 */
1077int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1078void truncate_data_blocks(struct dnode_of_data *);
1079int truncate_blocks(struct inode *, u64);
1080void f2fs_truncate(struct inode *);
1081int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
1082int f2fs_setattr(struct dentry *, struct iattr *);
1083int truncate_hole(struct inode *, pgoff_t, pgoff_t);
1084int truncate_data_blocks_range(struct dnode_of_data *, int);
1085long f2fs_ioctl(struct file *, unsigned int, unsigned long);
1086long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
1087
1088/*
1089 * inode.c
1090 */
1091void f2fs_set_inode_flags(struct inode *);
1092struct inode *f2fs_iget(struct super_block *, unsigned long);
1093int try_to_free_nats(struct f2fs_sb_info *, int);
1094void update_inode(struct inode *, struct page *);
1095void update_inode_page(struct inode *);
1096int f2fs_write_inode(struct inode *, struct writeback_control *);
1097void f2fs_evict_inode(struct inode *);
1098
1099/*
1100 * namei.c
1101 */
1102struct dentry *f2fs_get_parent(struct dentry *child);
1103
1104/*
1105 * dir.c
1106 */
1107struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1108 struct page **);
1109struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1110ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1111void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1112 struct page *, struct inode *);
1113int update_dent_inode(struct inode *, const struct qstr *);
1114int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
1115void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1116int f2fs_make_empty(struct inode *, struct inode *);
1117bool f2fs_empty_dir(struct inode *);
1118
1119static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1120{
1121 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1122 inode);
1123}
1124
1125/*
1126 * super.c
1127 */
1128int f2fs_sync_fs(struct super_block *, int);
1129extern __printf(3, 4)
1130void f2fs_msg(struct super_block *, const char *, const char *, ...);
1131
1132/*
1133 * hash.c
1134 */
1135f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
1136
1137/*
1138 * node.c
1139 */
1140struct dnode_of_data;
1141struct node_info;
1142
1143int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1144bool fsync_mark_done(struct f2fs_sb_info *, nid_t);
1145void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1146int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1147int truncate_inode_blocks(struct inode *, pgoff_t);
1148int truncate_xattr_node(struct inode *, struct page *);
1149int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1150void remove_inode_page(struct inode *);
1151struct page *new_inode_page(struct inode *, const struct qstr *);
1152struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1153void ra_node_page(struct f2fs_sb_info *, nid_t);
1154struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1155struct page *get_node_page_ra(struct page *, int);
1156void sync_inode_page(struct dnode_of_data *);
1157int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1158bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1159void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1160void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1161void recover_node_page(struct f2fs_sb_info *, struct page *,
1162 struct f2fs_summary *, struct node_info *, block_t);
1163bool recover_xattr_data(struct inode *, struct page *, block_t);
1164int recover_inode_page(struct f2fs_sb_info *, struct page *);
1165int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1166 struct f2fs_summary_block *);
1167void flush_nat_entries(struct f2fs_sb_info *);
1168int build_node_manager(struct f2fs_sb_info *);
1169void destroy_node_manager(struct f2fs_sb_info *);
1170int __init create_node_manager_caches(void);
1171void destroy_node_manager_caches(void);
1172
1173/*
1174 * segment.c
1175 */
1176void f2fs_balance_fs(struct f2fs_sb_info *);
1177void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1178int f2fs_issue_flush(struct f2fs_sb_info *);
1179void invalidate_blocks(struct f2fs_sb_info *, block_t);
1180void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
1181void clear_prefree_segments(struct f2fs_sb_info *);
1182int npages_for_summary_flush(struct f2fs_sb_info *);
1183void allocate_new_segments(struct f2fs_sb_info *);
1184struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1185void write_meta_page(struct f2fs_sb_info *, struct page *);
1186void write_node_page(struct f2fs_sb_info *, struct page *,
1187 struct f2fs_io_info *, unsigned int, block_t, block_t *);
1188void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1189 struct f2fs_io_info *);
1190void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
1191void recover_data_page(struct f2fs_sb_info *, struct page *,
1192 struct f2fs_summary *, block_t, block_t);
1193void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1194 struct f2fs_summary *, block_t, block_t);
1195void allocate_data_block(struct f2fs_sb_info *, struct page *,
1196 block_t, block_t *, struct f2fs_summary *, int);
1197void f2fs_wait_on_page_writeback(struct page *, enum page_type);
1198void write_data_summaries(struct f2fs_sb_info *, block_t);
1199void write_node_summaries(struct f2fs_sb_info *, block_t);
1200int lookup_journal_in_cursum(struct f2fs_summary_block *,
1201 int, unsigned int, int);
1202void flush_sit_entries(struct f2fs_sb_info *);
1203int build_segment_manager(struct f2fs_sb_info *);
1204void destroy_segment_manager(struct f2fs_sb_info *);
1205int __init create_segment_manager_caches(void);
1206void destroy_segment_manager_caches(void);
1207
1208/*
1209 * checkpoint.c
1210 */
1211struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1212struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1213int ra_meta_pages(struct f2fs_sb_info *, int, int, int);
1214long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1215int acquire_orphan_inode(struct f2fs_sb_info *);
1216void release_orphan_inode(struct f2fs_sb_info *);
1217void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1218void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1219void recover_orphan_inodes(struct f2fs_sb_info *);
1220int get_valid_checkpoint(struct f2fs_sb_info *);
1221void set_dirty_dir_page(struct inode *, struct page *);
1222void add_dirty_dir_inode(struct inode *);
1223void remove_dirty_dir_inode(struct inode *);
1224struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
1225void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1226void write_checkpoint(struct f2fs_sb_info *, bool);
1227void init_orphan_info(struct f2fs_sb_info *);
1228int __init create_checkpoint_caches(void);
1229void destroy_checkpoint_caches(void);
1230
1231/*
1232 * data.c
1233 */
1234void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
1235int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1236void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
1237 struct f2fs_io_info *);
1238int reserve_new_block(struct dnode_of_data *);
1239int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
1240void update_extent_cache(block_t, struct dnode_of_data *);
1241struct page *find_data_page(struct inode *, pgoff_t, bool);
1242struct page *get_lock_data_page(struct inode *, pgoff_t);
1243struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1244int do_write_data_page(struct page *, struct f2fs_io_info *);
1245
1246/*
1247 * gc.c
1248 */
1249int start_gc_thread(struct f2fs_sb_info *);
1250void stop_gc_thread(struct f2fs_sb_info *);
1251block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
1252int f2fs_gc(struct f2fs_sb_info *);
1253void build_gc_manager(struct f2fs_sb_info *);
1254int __init create_gc_caches(void);
1255void destroy_gc_caches(void);
1256
1257/*
1258 * recovery.c
1259 */
1260int recover_fsync_data(struct f2fs_sb_info *);
1261bool space_for_roll_forward(struct f2fs_sb_info *);
1262
1263/*
1264 * debug.c
1265 */
1266#ifdef CONFIG_F2FS_STAT_FS
1267struct f2fs_stat_info {
1268 struct list_head stat_list;
1269 struct f2fs_sb_info *sbi;
1270 struct mutex stat_lock;
1271 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1272 int main_area_segs, main_area_sections, main_area_zones;
1273 int hit_ext, total_ext;
1274 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1275 int nats, sits, fnids;
1276 int total_count, utilization;
1277 int bg_gc, inline_inode;
1278 unsigned int valid_count, valid_node_count, valid_inode_count;
1279 unsigned int bimodal, avg_vblocks;
1280 int util_free, util_valid, util_invalid;
1281 int rsvd_segs, overp_segs;
1282 int dirty_count, node_pages, meta_pages;
1283 int prefree_count, call_count, cp_count;
1284 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1285 int tot_blks, data_blks, node_blks;
1286 int curseg[NR_CURSEG_TYPE];
1287 int cursec[NR_CURSEG_TYPE];
1288 int curzone[NR_CURSEG_TYPE];
1289
1290 unsigned int segment_count[2];
1291 unsigned int block_count[2];
1292 unsigned base_mem, cache_mem;
1293};
1294
1295static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1296{
1297 return (struct f2fs_stat_info *)sbi->stat_info;
1298}
1299
1300#define stat_inc_cp_count(si) ((si)->cp_count++)
1301#define stat_inc_call_count(si) ((si)->call_count++)
1302#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1303#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1304#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1305#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1306#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1307#define stat_inc_inline_inode(inode) \
1308 do { \
1309 if (f2fs_has_inline_data(inode)) \
1310 ((F2FS_SB(inode->i_sb))->inline_inode++); \
1311 } while (0)
1312#define stat_dec_inline_inode(inode) \
1313 do { \
1314 if (f2fs_has_inline_data(inode)) \
1315 ((F2FS_SB(inode->i_sb))->inline_inode--); \
1316 } while (0)
1317
1318#define stat_inc_seg_type(sbi, curseg) \
1319 ((sbi)->segment_count[(curseg)->alloc_type]++)
1320#define stat_inc_block_count(sbi, curseg) \
1321 ((sbi)->block_count[(curseg)->alloc_type]++)
1322
1323#define stat_inc_seg_count(sbi, type) \
1324 do { \
1325 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1326 (si)->tot_segs++; \
1327 if (type == SUM_TYPE_DATA) \
1328 si->data_segs++; \
1329 else \
1330 si->node_segs++; \
1331 } while (0)
1332
1333#define stat_inc_tot_blk_count(si, blks) \
1334 (si->tot_blks += (blks))
1335
1336#define stat_inc_data_blk_count(sbi, blks) \
1337 do { \
1338 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1339 stat_inc_tot_blk_count(si, blks); \
1340 si->data_blks += (blks); \
1341 } while (0)
1342
1343#define stat_inc_node_blk_count(sbi, blks) \
1344 do { \
1345 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1346 stat_inc_tot_blk_count(si, blks); \
1347 si->node_blks += (blks); \
1348 } while (0)
1349
1350int f2fs_build_stats(struct f2fs_sb_info *);
1351void f2fs_destroy_stats(struct f2fs_sb_info *);
1352void __init f2fs_create_root_stats(void);
1353void f2fs_destroy_root_stats(void);
1354#else
1355#define stat_inc_cp_count(si)
1356#define stat_inc_call_count(si)
1357#define stat_inc_bggc_count(si)
1358#define stat_inc_dirty_dir(sbi)
1359#define stat_dec_dirty_dir(sbi)
1360#define stat_inc_total_hit(sb)
1361#define stat_inc_read_hit(sb)
1362#define stat_inc_inline_inode(inode)
1363#define stat_dec_inline_inode(inode)
1364#define stat_inc_seg_type(sbi, curseg)
1365#define stat_inc_block_count(sbi, curseg)
1366#define stat_inc_seg_count(si, type)
1367#define stat_inc_tot_blk_count(si, blks)
1368#define stat_inc_data_blk_count(si, blks)
1369#define stat_inc_node_blk_count(sbi, blks)
1370
1371static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1372static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1373static inline void __init f2fs_create_root_stats(void) { }
1374static inline void f2fs_destroy_root_stats(void) { }
1375#endif
1376
1377extern const struct file_operations f2fs_dir_operations;
1378extern const struct file_operations f2fs_file_operations;
1379extern const struct inode_operations f2fs_file_inode_operations;
1380extern const struct address_space_operations f2fs_dblock_aops;
1381extern const struct address_space_operations f2fs_node_aops;
1382extern const struct address_space_operations f2fs_meta_aops;
1383extern const struct inode_operations f2fs_dir_inode_operations;
1384extern const struct inode_operations f2fs_symlink_inode_operations;
1385extern const struct inode_operations f2fs_special_inode_operations;
1386
1387/*
1388 * inline.c
1389 */
1390bool f2fs_may_inline(struct inode *);
1391int f2fs_read_inline_data(struct inode *, struct page *);
1392int f2fs_convert_inline_data(struct inode *, pgoff_t);
1393int f2fs_write_inline_data(struct inode *, struct page *, unsigned int);
1394int recover_inline_data(struct inode *, struct page *);
1395#endif