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f2fs: avoid lock debugging overhead
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / fs / f2fs / f2fs.h
CommitLineData
0a8165d7 1/*
39a53e0c
JK		 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>
39a53e0c
JK		 17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
c2d715d1 20#include <linux/kobject.h>
7bd59381 21#include <linux/sched.h>
39a53e0c 22
5d56b671
JK		 23#ifdef CONFIG_F2FS_CHECK_FS
24#define f2fs_bug_on(condition) BUG_ON(condition)
0daaad97 25#define f2fs_down_write(x, y) down_write_nest_lock(x, y)
5d56b671
JK		 26#else
27#define f2fs_bug_on(condition)
0daaad97 28#define f2fs_down_write(x, y) down_write(x)
5d56b671
JK		 29#endif
30
39a53e0c
JK		 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
444c580f 41#define F2FS_MOUNT_INLINE_XATTR 0x00000080
39a53e0c
JK		 42
43#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
44#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
45#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
46
47#define ver_after(a, b) (typecheck(unsigned long long, a) && \
48 typecheck(unsigned long long, b) && \
49 ((long long)((a) - (b)) > 0))
50
a9841c4d
JK		 51typedef u32 block_t; /*
52 * should not change u32, since it is the on-disk block
53 * address format, __le32.
54 */
39a53e0c
JK		 55typedef u32 nid_t;
56
57struct f2fs_mount_info {
58 unsigned int opt;
59};
60
7e586fa0
JK		 61#define CRCPOLY_LE 0xedb88320
62
63static inline __u32 f2fs_crc32(void *buf, size_t len)
39a53e0c 64{
7e586fa0
JK		 65 unsigned char *p = (unsigned char *)buf;
66 __u32 crc = F2FS_SUPER_MAGIC;
67 int i;
68
69 while (len--) {
70 crc ^= *p++;
71 for (i = 0; i < 8; i++)
72 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
73 }
74 return crc;
39a53e0c
JK		 75}
76
7e586fa0 77static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
39a53e0c 78{
7e586fa0 79 return f2fs_crc32(buf, buf_size) == blk_crc;
39a53e0c
JK		 80}
81
82/*
83 * For checkpoint manager
84 */
85enum {
86 NAT_BITMAP,
87 SIT_BITMAP
88};
89
90/* for the list of orphan inodes */
91struct orphan_inode_entry {
92 struct list_head list; /* list head */
93 nid_t ino; /* inode number */
94};
95
96/* for the list of directory inodes */
97struct dir_inode_entry {
98 struct list_head list; /* list head */
99 struct inode *inode; /* vfs inode pointer */
100};
101
7fd9e544
JK		 102/* for the list of blockaddresses to be discarded */
103struct discard_entry {
104 struct list_head list; /* list head */
105 block_t blkaddr; /* block address to be discarded */
106 int len; /* # of consecutive blocks of the discard */
107};
108
39a53e0c
JK		 109/* for the list of fsync inodes, used only during recovery */
110struct fsync_inode_entry {
111 struct list_head list; /* list head */
112 struct inode *inode; /* vfs inode pointer */
113 block_t blkaddr; /* block address locating the last inode */
114};
115
116#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
117#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
118
119#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
120#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
121#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
122#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
123
124static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
125{
126 int before = nats_in_cursum(rs);
127 rs->n_nats = cpu_to_le16(before + i);
128 return before;
129}
130
131static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
132{
133 int before = sits_in_cursum(rs);
134 rs->n_sits = cpu_to_le16(before + i);
135 return before;
136}
137
e9750824
NJ		 138/*
139 * ioctl commands
140 */
141#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
142#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
143
144#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
145/*
146 * ioctl commands in 32 bit emulation
147 */
148#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
149#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
150#endif
151
39a53e0c
JK		 152/*
153 * For INODE and NODE manager
154 */
dbe6a5ff
JK		 155/*
156 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
157 * as its node offset to distinguish from index node blocks.
158 * But some bits are used to mark the node block.
159 */
160#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
161 >> OFFSET_BIT_SHIFT)
266e97a8
JK		 162enum {
163 ALLOC_NODE, /* allocate a new node page if needed */
164 LOOKUP_NODE, /* look up a node without readahead */
165 LOOKUP_NODE_RA, /*
166 * look up a node with readahead called
167 * by get_datablock_ro.
39a53e0c 168 */
266e97a8
JK		 169};
170
39a53e0c
JK		 171#define F2FS_LINK_MAX 32000 /* maximum link count per file */
172
173/* for in-memory extent cache entry */
c11abd1a
JK		 174#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
175
39a53e0c
JK		 176struct extent_info {
177 rwlock_t ext_lock; /* rwlock for consistency */
178 unsigned int fofs; /* start offset in a file */
179 u32 blk_addr; /* start block address of the extent */
111d2495 180 unsigned int len; /* length of the extent */
39a53e0c
JK		 181};
182
183/*
184 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
185 */
186#define FADVISE_COLD_BIT 0x01
354a3399 187#define FADVISE_LOST_PINO_BIT 0x02
39a53e0c
JK		 188
189struct f2fs_inode_info {
190 struct inode vfs_inode; /* serve a vfs inode */
191 unsigned long i_flags; /* keep an inode flags for ioctl */
192 unsigned char i_advise; /* use to give file attribute hints */
193 unsigned int i_current_depth; /* use only in directory structure */
6666e6aa 194 unsigned int i_pino; /* parent inode number */
39a53e0c
JK		 195 umode_t i_acl_mode; /* keep file acl mode temporarily */
196
197 /* Use below internally in f2fs*/
198 unsigned long flags; /* use to pass per-file flags */
39a53e0c
JK		 199 atomic_t dirty_dents; /* # of dirty dentry pages */
200 f2fs_hash_t chash; /* hash value of given file name */
201 unsigned int clevel; /* maximum level of given file name */
202 nid_t i_xattr_nid; /* node id that contains xattrs */
e518ff81 203 unsigned long long xattr_ver; /* cp version of xattr modification */
39a53e0c
JK		 204 struct extent_info ext; /* in-memory extent cache entry */
205};
206
207static inline void get_extent_info(struct extent_info *ext,
208 struct f2fs_extent i_ext)
209{
210 write_lock(&ext->ext_lock);
211 ext->fofs = le32_to_cpu(i_ext.fofs);
212 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
213 ext->len = le32_to_cpu(i_ext.len);
214 write_unlock(&ext->ext_lock);
215}
216
217static inline void set_raw_extent(struct extent_info *ext,
218 struct f2fs_extent *i_ext)
219{
220 read_lock(&ext->ext_lock);
221 i_ext->fofs = cpu_to_le32(ext->fofs);
222 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
223 i_ext->len = cpu_to_le32(ext->len);
224 read_unlock(&ext->ext_lock);
225}
226
227struct f2fs_nm_info {
228 block_t nat_blkaddr; /* base disk address of NAT */
229 nid_t max_nid; /* maximum possible node ids */
39a53e0c
JK		 230 nid_t next_scan_nid; /* the next nid to be scanned */
231
232 /* NAT cache management */
233 struct radix_tree_root nat_root;/* root of the nat entry cache */
234 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
235 unsigned int nat_cnt; /* the # of cached nat entries */
236 struct list_head nat_entries; /* cached nat entry list (clean) */
237 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
238
239 /* free node ids management */
240 struct list_head free_nid_list; /* a list for free nids */
241 spinlock_t free_nid_list_lock; /* protect free nid list */
242 unsigned int fcnt; /* the number of free node id */
243 struct mutex build_lock; /* lock for build free nids */
244
245 /* for checkpoint */
246 char *nat_bitmap; /* NAT bitmap pointer */
247 int bitmap_size; /* bitmap size */
248};
249
250/*
251 * this structure is used as one of function parameters.
252 * all the information are dedicated to a given direct node block determined
253 * by the data offset in a file.
254 */
255struct dnode_of_data {
256 struct inode *inode; /* vfs inode pointer */
257 struct page *inode_page; /* its inode page, NULL is possible */
258 struct page *node_page; /* cached direct node page */
259 nid_t nid; /* node id of the direct node block */
260 unsigned int ofs_in_node; /* data offset in the node page */
261 bool inode_page_locked; /* inode page is locked or not */
262 block_t data_blkaddr; /* block address of the node block */
263};
264
265static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
266 struct page *ipage, struct page *npage, nid_t nid)
267{
d66d1f76 268 memset(dn, 0, sizeof(*dn));
39a53e0c
JK		 269 dn->inode = inode;
270 dn->inode_page = ipage;
271 dn->node_page = npage;
272 dn->nid = nid;
39a53e0c
JK		 273}
274
275/*
276 * For SIT manager
277 *
278 * By default, there are 6 active log areas across the whole main area.
279 * When considering hot and cold data separation to reduce cleaning overhead,
280 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
281 * respectively.
282 * In the current design, you should not change the numbers intentionally.
283 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
284 * logs individually according to the underlying devices. (default: 6)
285 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
286 * data and 8 for node logs.
287 */
288#define NR_CURSEG_DATA_TYPE (3)
289#define NR_CURSEG_NODE_TYPE (3)
290#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
291
292enum {
293 CURSEG_HOT_DATA = 0, /* directory entry blocks */
294 CURSEG_WARM_DATA, /* data blocks */
295 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
296 CURSEG_HOT_NODE, /* direct node blocks of directory files */
297 CURSEG_WARM_NODE, /* direct node blocks of normal files */
298 CURSEG_COLD_NODE, /* indirect node blocks */
299 NO_CHECK_TYPE
300};
301
302struct f2fs_sm_info {
303 struct sit_info *sit_info; /* whole segment information */
304 struct free_segmap_info *free_info; /* free segment information */
305 struct dirty_seglist_info *dirty_info; /* dirty segment information */
306 struct curseg_info *curseg_array; /* active segment information */
307
308 struct list_head wblist_head; /* list of under-writeback pages */
309 spinlock_t wblist_lock; /* lock for checkpoint */
310
311 block_t seg0_blkaddr; /* block address of 0'th segment */
312 block_t main_blkaddr; /* start block address of main area */
313 block_t ssa_blkaddr; /* start block address of SSA area */
314
315 unsigned int segment_count; /* total # of segments */
316 unsigned int main_segments; /* # of segments in main area */
317 unsigned int reserved_segments; /* # of reserved segments */
318 unsigned int ovp_segments; /* # of overprovision segments */
81eb8d6e
JK		 319
320 /* a threshold to reclaim prefree segments */
321 unsigned int rec_prefree_segments;
7fd9e544
JK		 322
323 /* for small discard management */
324 struct list_head discard_list; /* 4KB discard list */
325 int nr_discards; /* # of discards in the list */
326 int max_discards; /* max. discards to be issued */
39a53e0c
JK		 327};
328
39a53e0c
JK		 329/*
330 * For superblock
331 */
332/*
333 * COUNT_TYPE for monitoring
334 *
335 * f2fs monitors the number of several block types such as on-writeback,
336 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
337 */
338enum count_type {
339 F2FS_WRITEBACK,
340 F2FS_DIRTY_DENTS,
341 F2FS_DIRTY_NODES,
342 F2FS_DIRTY_META,
343 NR_COUNT_TYPE,
344};
345
39a53e0c
JK		 346/*
347 * The below are the page types of bios used in submti_bio().
348 * The available types are:
349 * DATA User data pages. It operates as async mode.
350 * NODE Node pages. It operates as async mode.
351 * META FS metadata pages such as SIT, NAT, CP.
352 * NR_PAGE_TYPE The number of page types.
353 * META_FLUSH Make sure the previous pages are written
354 * with waiting the bio's completion
355 * ... Only can be used with META.
356 */
7d5e5109 357#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
39a53e0c
JK		 358enum page_type {
359 DATA,
360 NODE,
361 META,
362 NR_PAGE_TYPE,
363 META_FLUSH,
364};
365
1ff7bd3b
JK		 366struct f2fs_bio_info {
367 struct bio *bio; /* bios to merge */
368 sector_t last_block_in_bio; /* last block number */
369 struct mutex io_mutex; /* mutex for bio */
370};
371
39a53e0c
JK		 372struct f2fs_sb_info {
373 struct super_block *sb; /* pointer to VFS super block */
5e176d54 374 struct proc_dir_entry *s_proc; /* proc entry */
39a53e0c
JK		 375 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
376 struct f2fs_super_block *raw_super; /* raw super block pointer */
377 int s_dirty; /* dirty flag for checkpoint */
378
379 /* for node-related operations */
380 struct f2fs_nm_info *nm_info; /* node manager */
381 struct inode *node_inode; /* cache node blocks */
382
383 /* for segment-related operations */
384 struct f2fs_sm_info *sm_info; /* segment manager */
1ff7bd3b
JK		 385
386 /* for bio operations */
924b720b 387 struct f2fs_bio_info read_io; /* for read bios */
1ff7bd3b 388 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
39a53e0c
JK		 389
390 /* for checkpoint */
391 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
392 struct inode *meta_inode; /* cache meta blocks */
39936837 393 struct mutex cp_mutex; /* checkpoint procedure lock */
e479556b 394 struct rw_semaphore cp_rwsem; /* blocking FS operations */
39936837 395 struct mutex node_write; /* locking node writes */
39a53e0c 396 struct mutex writepages; /* mutex for writepages() */
aabe5136
HL		 397 bool por_doing; /* recovery is doing or not */
398 bool on_build_free_nids; /* build_free_nids is doing */
fb51b5ef 399 wait_queue_head_t cp_wait;
39a53e0c
JK		 400
401 /* for orphan inode management */
402 struct list_head orphan_inode_list; /* orphan inode list */
403 struct mutex orphan_inode_mutex; /* for orphan inode list */
404 unsigned int n_orphans; /* # of orphan inodes */
405
406 /* for directory inode management */
407 struct list_head dir_inode_list; /* dir inode list */
408 spinlock_t dir_inode_lock; /* for dir inode list lock */
39a53e0c
JK		 409
410 /* basic file system units */
411 unsigned int log_sectors_per_block; /* log2 sectors per block */
412 unsigned int log_blocksize; /* log2 block size */
413 unsigned int blocksize; /* block size */
414 unsigned int root_ino_num; /* root inode number*/
415 unsigned int node_ino_num; /* node inode number*/
416 unsigned int meta_ino_num; /* meta inode number*/
417 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
418 unsigned int blocks_per_seg; /* blocks per segment */
419 unsigned int segs_per_sec; /* segments per section */
420 unsigned int secs_per_zone; /* sections per zone */
421 unsigned int total_sections; /* total section count */
422 unsigned int total_node_count; /* total node block count */
423 unsigned int total_valid_node_count; /* valid node block count */
424 unsigned int total_valid_inode_count; /* valid inode count */
425 int active_logs; /* # of active logs */
426
427 block_t user_block_count; /* # of user blocks */
428 block_t total_valid_block_count; /* # of valid blocks */
429 block_t alloc_valid_block_count; /* # of allocated blocks */
430 block_t last_valid_block_count; /* for recovery */
431 u32 s_next_generation; /* for NFS support */
432 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
433
434 struct f2fs_mount_info mount_opt; /* mount options */
435
436 /* for cleaning operations */
437 struct mutex gc_mutex; /* mutex for GC */
438 struct f2fs_gc_kthread *gc_thread; /* GC thread */
5ec4e49f 439 unsigned int cur_victim_sec; /* current victim section num */
39a53e0c
JK		 440
441 /*
442 * for stat information.
443 * one is for the LFS mode, and the other is for the SSR mode.
444 */
35b09d82 445#ifdef CONFIG_F2FS_STAT_FS
39a53e0c
JK		 446 struct f2fs_stat_info *stat_info; /* FS status information */
447 unsigned int segment_count[2]; /* # of allocated segments */
448 unsigned int block_count[2]; /* # of allocated blocks */
39a53e0c
JK		 449 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
450 int bg_gc; /* background gc calls */
35b09d82
NJ		 451 unsigned int n_dirty_dirs; /* # of dir inodes */
452#endif
453 unsigned int last_victim[2]; /* last victim segment # */
39a53e0c 454 spinlock_t stat_lock; /* lock for stat operations */
b59d0bae
NJ		 455
456 /* For sysfs suppport */
457 struct kobject s_kobj;
458 struct completion s_kobj_unregister;
39a53e0c
JK		 459};
460
461/*
462 * Inline functions
463 */
464static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
465{
466 return container_of(inode, struct f2fs_inode_info, vfs_inode);
467}
468
469static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
470{
471 return sb->s_fs_info;
472}
473
474static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
475{
476 return (struct f2fs_super_block *)(sbi->raw_super);
477}
478
479static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
480{
481 return (struct f2fs_checkpoint *)(sbi->ckpt);
482}
483
45590710
GZ		 484static inline struct f2fs_node *F2FS_NODE(struct page *page)
485{
486 return (struct f2fs_node *)page_address(page);
487}
488
39a53e0c
JK		 489static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
490{
491 return (struct f2fs_nm_info *)(sbi->nm_info);
492}
493
494static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
495{
496 return (struct f2fs_sm_info *)(sbi->sm_info);
497}
498
499static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
500{
501 return (struct sit_info *)(SM_I(sbi)->sit_info);
502}
503
504static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
505{
506 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
507}
508
509static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
510{
511 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
512}
513
514static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
515{
516 sbi->s_dirty = 1;
517}
518
519static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
520{
521 sbi->s_dirty = 0;
522}
523
d71b5564
JK		 524static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
525{
526 return le64_to_cpu(cp->checkpoint_ver);
527}
528
25ca923b
JK		 529static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
530{
531 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
532 return ckpt_flags & f;
533}
534
535static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
536{
537 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
538 ckpt_flags |= f;
539 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
540}
541
542static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
543{
544 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
545 ckpt_flags &= (~f);
546 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
547}
548
e479556b 549static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
39936837 550{
e479556b 551 down_read(&sbi->cp_rwsem);
39936837
JK		 552}
553
e479556b 554static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
39a53e0c 555{
e479556b 556 up_read(&sbi->cp_rwsem);
39a53e0c
JK		 557}
558
e479556b 559static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
39a53e0c 560{
0daaad97 561 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
39936837
JK		 562}
563
e479556b 564static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
39936837 565{
e479556b 566 up_write(&sbi->cp_rwsem);
39a53e0c
JK		 567}
568
569/*
570 * Check whether the given nid is within node id range.
571 */
064e0823 572static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
39a53e0c 573{
064e0823
NJ		 574 WARN_ON((nid >= NM_I(sbi)->max_nid));
575 if (nid >= NM_I(sbi)->max_nid)
576 return -EINVAL;
577 return 0;
39a53e0c
JK		 578}
579
580#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
581
582/*
583 * Check whether the inode has blocks or not
584 */
585static inline int F2FS_HAS_BLOCKS(struct inode *inode)
586{
587 if (F2FS_I(inode)->i_xattr_nid)
588 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
589 else
590 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
591}
592
593static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
594 struct inode *inode, blkcnt_t count)
595{
596 block_t valid_block_count;
597
598 spin_lock(&sbi->stat_lock);
599 valid_block_count =
600 sbi->total_valid_block_count + (block_t)count;
601 if (valid_block_count > sbi->user_block_count) {
602 spin_unlock(&sbi->stat_lock);
603 return false;
604 }
605 inode->i_blocks += count;
606 sbi->total_valid_block_count = valid_block_count;
607 sbi->alloc_valid_block_count += (block_t)count;
608 spin_unlock(&sbi->stat_lock);
609 return true;
610}
611
da19b0dc 612static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
39a53e0c
JK		 613 struct inode *inode,
614 blkcnt_t count)
615{
616 spin_lock(&sbi->stat_lock);
5d56b671
JK		 617 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
618 f2fs_bug_on(inode->i_blocks < count);
39a53e0c
JK		 619 inode->i_blocks -= count;
620 sbi->total_valid_block_count -= (block_t)count;
621 spin_unlock(&sbi->stat_lock);
39a53e0c
JK		 622}
623
624static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
625{
626 atomic_inc(&sbi->nr_pages[count_type]);
627 F2FS_SET_SB_DIRT(sbi);
628}
629
630static inline void inode_inc_dirty_dents(struct inode *inode)
631{
632 atomic_inc(&F2FS_I(inode)->dirty_dents);
633}
634
635static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
636{
637 atomic_dec(&sbi->nr_pages[count_type]);
638}
639
640static inline void inode_dec_dirty_dents(struct inode *inode)
641{
642 atomic_dec(&F2FS_I(inode)->dirty_dents);
643}
644
645static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
646{
647 return atomic_read(&sbi->nr_pages[count_type]);
648}
649
5ac206cf
NJ		 650static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
651{
652 unsigned int pages_per_sec = sbi->segs_per_sec *
653 (1 << sbi->log_blocks_per_seg);
654 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
655 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
656}
657
39a53e0c
JK		 658static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
659{
660 block_t ret;
661 spin_lock(&sbi->stat_lock);
662 ret = sbi->total_valid_block_count;
663 spin_unlock(&sbi->stat_lock);
664 return ret;
665}
666
667static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
668{
669 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
670
671 /* return NAT or SIT bitmap */
672 if (flag == NAT_BITMAP)
673 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
674 else if (flag == SIT_BITMAP)
675 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
676
677 return 0;
678}
679
680static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
681{
682 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
25ca923b
JK		 683 int offset = (flag == NAT_BITMAP) ?
684 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
39a53e0c
JK		 685 return &ckpt->sit_nat_version_bitmap + offset;
686}
687
688static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
689{
690 block_t start_addr;
691 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
d71b5564 692 unsigned long long ckpt_version = cur_cp_version(ckpt);
39a53e0c 693
25ca923b 694 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
39a53e0c
JK		 695
696 /*
697 * odd numbered checkpoint should at cp segment 0
698 * and even segent must be at cp segment 1
699 */
700 if (!(ckpt_version & 1))
701 start_addr += sbi->blocks_per_seg;
702
703 return start_addr;
704}
705
706static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
707{
708 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
709}
710
711static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 712 struct inode *inode)
39a53e0c
JK		 713{
714 block_t valid_block_count;
715 unsigned int valid_node_count;
716
717 spin_lock(&sbi->stat_lock);
718
ef86d709 719 valid_block_count = sbi->total_valid_block_count + 1;
39a53e0c
JK		 720 if (valid_block_count > sbi->user_block_count) {
721 spin_unlock(&sbi->stat_lock);
722 return false;
723 }
724
ef86d709 725 valid_node_count = sbi->total_valid_node_count + 1;
39a53e0c
JK		 726 if (valid_node_count > sbi->total_node_count) {
727 spin_unlock(&sbi->stat_lock);
728 return false;
729 }
730
731 if (inode)
ef86d709
GZ		 732 inode->i_blocks++;
733
734 sbi->alloc_valid_block_count++;
735 sbi->total_valid_node_count++;
736 sbi->total_valid_block_count++;
39a53e0c
JK		 737 spin_unlock(&sbi->stat_lock);
738
739 return true;
740}
741
742static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 743 struct inode *inode)
39a53e0c
JK		 744{
745 spin_lock(&sbi->stat_lock);
746
ef86d709
GZ		 747 f2fs_bug_on(!sbi->total_valid_block_count);
748 f2fs_bug_on(!sbi->total_valid_node_count);
749 f2fs_bug_on(!inode->i_blocks);
39a53e0c 750
ef86d709
GZ		 751 inode->i_blocks--;
752 sbi->total_valid_node_count--;
753 sbi->total_valid_block_count--;
39a53e0c
JK		 754
755 spin_unlock(&sbi->stat_lock);
756}
757
758static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
759{
760 unsigned int ret;
761 spin_lock(&sbi->stat_lock);
762 ret = sbi->total_valid_node_count;
763 spin_unlock(&sbi->stat_lock);
764 return ret;
765}
766
767static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
768{
769 spin_lock(&sbi->stat_lock);
5d56b671 770 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
39a53e0c
JK		 771 sbi->total_valid_inode_count++;
772 spin_unlock(&sbi->stat_lock);
773}
774
775static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
776{
777 spin_lock(&sbi->stat_lock);
5d56b671 778 f2fs_bug_on(!sbi->total_valid_inode_count);
39a53e0c
JK		 779 sbi->total_valid_inode_count--;
780 spin_unlock(&sbi->stat_lock);
781 return 0;
782}
783
784static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
785{
786 unsigned int ret;
787 spin_lock(&sbi->stat_lock);
788 ret = sbi->total_valid_inode_count;
789 spin_unlock(&sbi->stat_lock);
790 return ret;
791}
792
793static inline void f2fs_put_page(struct page *page, int unlock)
794{
795 if (!page || IS_ERR(page))
796 return;
797
798 if (unlock) {
5d56b671 799 f2fs_bug_on(!PageLocked(page));
39a53e0c
JK		 800 unlock_page(page);
801 }
802 page_cache_release(page);
803}
804
805static inline void f2fs_put_dnode(struct dnode_of_data *dn)
806{
807 if (dn->node_page)
808 f2fs_put_page(dn->node_page, 1);
809 if (dn->inode_page && dn->node_page != dn->inode_page)
810 f2fs_put_page(dn->inode_page, 0);
811 dn->node_page = NULL;
812 dn->inode_page = NULL;
813}
814
815static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
816 size_t size, void (*ctor)(void *))
817{
818 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
819}
820
7bd59381
GZ		 821static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
822 gfp_t flags)
823{
824 void *entry;
825retry:
826 entry = kmem_cache_alloc(cachep, flags);
827 if (!entry) {
828 cond_resched();
829 goto retry;
830 }
831
832 return entry;
833}
834
39a53e0c
JK		 835#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
836
837static inline bool IS_INODE(struct page *page)
838{
45590710 839 struct f2fs_node *p = F2FS_NODE(page);
39a53e0c
JK		 840 return RAW_IS_INODE(p);
841}
842
843static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
844{
845 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
846}
847
848static inline block_t datablock_addr(struct page *node_page,
849 unsigned int offset)
850{
851 struct f2fs_node *raw_node;
852 __le32 *addr_array;
45590710 853 raw_node = F2FS_NODE(node_page);
39a53e0c
JK		 854 addr_array = blkaddr_in_node(raw_node);
855 return le32_to_cpu(addr_array[offset]);
856}
857
858static inline int f2fs_test_bit(unsigned int nr, char *addr)
859{
860 int mask;
861
862 addr += (nr >> 3);
863 mask = 1 << (7 - (nr & 0x07));
864 return mask & *addr;
865}
866
867static inline int f2fs_set_bit(unsigned int nr, char *addr)
868{
869 int mask;
870 int ret;
871
872 addr += (nr >> 3);
873 mask = 1 << (7 - (nr & 0x07));
874 ret = mask & *addr;
875 *addr |= mask;
876 return ret;
877}
878
879static inline int f2fs_clear_bit(unsigned int nr, char *addr)
880{
881 int mask;
882 int ret;
883
884 addr += (nr >> 3);
885 mask = 1 << (7 - (nr & 0x07));
886 ret = mask & *addr;
887 *addr &= ~mask;
888 return ret;
889}
890
891/* used for f2fs_inode_info->flags */
892enum {
893 FI_NEW_INODE, /* indicate newly allocated inode */
b3783873 894 FI_DIRTY_INODE, /* indicate inode is dirty or not */
39a53e0c
JK		 895 FI_INC_LINK, /* need to increment i_nlink */
896 FI_ACL_MODE, /* indicate acl mode */
897 FI_NO_ALLOC, /* should not allocate any blocks */
699489bb 898 FI_UPDATE_DIR, /* should update inode block for consistency */
74d0b917 899 FI_DELAY_IPUT, /* used for the recovery */
c11abd1a 900 FI_NO_EXTENT, /* not to use the extent cache */
444c580f 901 FI_INLINE_XATTR, /* used for inline xattr */
39a53e0c
JK		 902};
903
904static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
905{
906 set_bit(flag, &fi->flags);
907}
908
909static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
910{
911 return test_bit(flag, &fi->flags);
912}
913
914static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
915{
916 clear_bit(flag, &fi->flags);
917}
918
919static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
920{
921 fi->i_acl_mode = mode;
922 set_inode_flag(fi, FI_ACL_MODE);
923}
924
925static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
926{
927 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
928 clear_inode_flag(fi, FI_ACL_MODE);
929 return 1;
930 }
931 return 0;
932}
933
444c580f
JK		 934static inline void get_inline_info(struct f2fs_inode_info *fi,
935 struct f2fs_inode *ri)
936{
937 if (ri->i_inline & F2FS_INLINE_XATTR)
938 set_inode_flag(fi, FI_INLINE_XATTR);
939}
940
941static inline void set_raw_inline(struct f2fs_inode_info *fi,
942 struct f2fs_inode *ri)
943{
944 ri->i_inline = 0;
945
946 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
947 ri->i_inline |= F2FS_INLINE_XATTR;
948}
949
de93653f
JK		 950static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
951{
952 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
953 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
954 return DEF_ADDRS_PER_INODE;
955}
956
65985d93
JK		 957static inline void *inline_xattr_addr(struct page *page)
958{
959 struct f2fs_inode *ri;
960 ri = (struct f2fs_inode *)page_address(page);
961 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
962 F2FS_INLINE_XATTR_ADDRS]);
963}
964
965static inline int inline_xattr_size(struct inode *inode)
966{
967 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
968 return F2FS_INLINE_XATTR_ADDRS << 2;
969 else
970 return 0;
971}
972
77888c1e
JK		 973static inline int f2fs_readonly(struct super_block *sb)
974{
975 return sb->s_flags & MS_RDONLY;
976}
977
39a53e0c
JK		 978/*
979 * file.c
980 */
981int f2fs_sync_file(struct file *, loff_t, loff_t, int);
982void truncate_data_blocks(struct dnode_of_data *);
983void f2fs_truncate(struct inode *);
2d4d9fb5 984int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
39a53e0c
JK		 985int f2fs_setattr(struct dentry *, struct iattr *);
986int truncate_hole(struct inode *, pgoff_t, pgoff_t);
b292dcab 987int truncate_data_blocks_range(struct dnode_of_data *, int);
39a53e0c 988long f2fs_ioctl(struct file *, unsigned int, unsigned long);
e9750824 989long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
39a53e0c
JK		 990
991/*
992 * inode.c
993 */
994void f2fs_set_inode_flags(struct inode *);
39a53e0c 995struct inode *f2fs_iget(struct super_block *, unsigned long);
4660f9c0 996int try_to_free_nats(struct f2fs_sb_info *, int);
39a53e0c 997void update_inode(struct inode *, struct page *);
39936837 998int update_inode_page(struct inode *);
39a53e0c
JK		 999int f2fs_write_inode(struct inode *, struct writeback_control *);
1000void f2fs_evict_inode(struct inode *);
1001
1002/*
1003 * namei.c
1004 */
1005struct dentry *f2fs_get_parent(struct dentry *child);
1006
1007/*
1008 * dir.c
1009 */
1010struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1011 struct page **);
1012struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1013ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1014void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1015 struct page *, struct inode *);
1cd14caf 1016int update_dent_inode(struct inode *, const struct qstr *);
b7f7a5e0 1017int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
39a53e0c
JK		 1018void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1019int f2fs_make_empty(struct inode *, struct inode *);
1020bool f2fs_empty_dir(struct inode *);
1021
b7f7a5e0
AV		 1022static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1023{
1024 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1025 inode);
1026}
1027
39a53e0c
JK		 1028/*
1029 * super.c
1030 */
1031int f2fs_sync_fs(struct super_block *, int);
a07ef784
NJ		 1032extern __printf(3, 4)
1033void f2fs_msg(struct super_block *, const char *, const char *, ...);
39a53e0c
JK		 1034
1035/*
1036 * hash.c
1037 */
9836b8b9 1038f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
39a53e0c
JK		 1039
1040/*
1041 * node.c
1042 */
1043struct dnode_of_data;
1044struct node_info;
1045
1046int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1047void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1048int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1049int truncate_inode_blocks(struct inode *, pgoff_t);
4f16fb0f 1050int truncate_xattr_node(struct inode *, struct page *);
cfe58f9d 1051int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
58e674d6 1052void remove_inode_page(struct inode *);
44a83ff6 1053struct page *new_inode_page(struct inode *, const struct qstr *);
8ae8f162 1054struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
39a53e0c
JK		 1055void ra_node_page(struct f2fs_sb_info *, nid_t);
1056struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1057struct page *get_node_page_ra(struct page *, int);
1058void sync_inode_page(struct dnode_of_data *);
1059int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1060bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1061void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1062void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1063void recover_node_page(struct f2fs_sb_info *, struct page *,
1064 struct f2fs_summary *, struct node_info *, block_t);
1065int recover_inode_page(struct f2fs_sb_info *, struct page *);
1066int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1067 struct f2fs_summary_block *);
1068void flush_nat_entries(struct f2fs_sb_info *);
1069int build_node_manager(struct f2fs_sb_info *);
1070void destroy_node_manager(struct f2fs_sb_info *);
6e6093a8 1071int __init create_node_manager_caches(void);
39a53e0c
JK		 1072void destroy_node_manager_caches(void);
1073
1074/*
1075 * segment.c
1076 */
1077void f2fs_balance_fs(struct f2fs_sb_info *);
4660f9c0 1078void f2fs_balance_fs_bg(struct f2fs_sb_info *);
39a53e0c 1079void invalidate_blocks(struct f2fs_sb_info *, block_t);
39a53e0c
JK		 1080void clear_prefree_segments(struct f2fs_sb_info *);
1081int npages_for_summary_flush(struct f2fs_sb_info *);
1082void allocate_new_segments(struct f2fs_sb_info *);
1083struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
3cd8a239 1084struct bio *f2fs_bio_alloc(struct block_device *, int);
a569469e
JX		 1085void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool);
1086void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
577e3495 1087void write_meta_page(struct f2fs_sb_info *, struct page *);
39a53e0c
JK		 1088void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1089 block_t, block_t *);
1090void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1091 block_t, block_t *);
1092void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1093void recover_data_page(struct f2fs_sb_info *, struct page *,
1094 struct f2fs_summary *, block_t, block_t);
1095void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1096 struct f2fs_summary *, block_t, block_t);
1097void write_data_summaries(struct f2fs_sb_info *, block_t);
1098void write_node_summaries(struct f2fs_sb_info *, block_t);
1099int lookup_journal_in_cursum(struct f2fs_summary_block *,
1100 int, unsigned int, int);
1101void flush_sit_entries(struct f2fs_sb_info *);
1102int build_segment_manager(struct f2fs_sb_info *);
39a53e0c 1103void destroy_segment_manager(struct f2fs_sb_info *);
7fd9e544
JK		 1104int __init create_segment_manager_caches(void);
1105void destroy_segment_manager_caches(void);
39a53e0c
JK		 1106
1107/*
1108 * checkpoint.c
1109 */
1110struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1111struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1112long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
cbd56e7d
JK		 1113int acquire_orphan_inode(struct f2fs_sb_info *);
1114void release_orphan_inode(struct f2fs_sb_info *);
39a53e0c
JK		 1115void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1116void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1117int recover_orphan_inodes(struct f2fs_sb_info *);
1118int get_valid_checkpoint(struct f2fs_sb_info *);
1119void set_dirty_dir_page(struct inode *, struct page *);
5deb8267 1120void add_dirty_dir_inode(struct inode *);
39a53e0c 1121void remove_dirty_dir_inode(struct inode *);
74d0b917 1122struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
39a53e0c 1123void sync_dirty_dir_inodes(struct f2fs_sb_info *);
43727527 1124void write_checkpoint(struct f2fs_sb_info *, bool);
39a53e0c 1125void init_orphan_info(struct f2fs_sb_info *);
6e6093a8 1126int __init create_checkpoint_caches(void);
39a53e0c
JK		 1127void destroy_checkpoint_caches(void);
1128
1129/*
1130 * data.c
1131 */
1132int reserve_new_block(struct dnode_of_data *);
1133void update_extent_cache(block_t, struct dnode_of_data *);
c718379b 1134struct page *find_data_page(struct inode *, pgoff_t, bool);
39a53e0c 1135struct page *get_lock_data_page(struct inode *, pgoff_t);
64aa7ed9 1136struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
39a53e0c 1137int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
924b720b
CY		 1138void f2fs_submit_read_bio(struct f2fs_sb_info *, int);
1139void submit_read_page(struct f2fs_sb_info *, struct page *, block_t, int);
39a53e0c
JK		 1140int do_write_data_page(struct page *);
1141
1142/*
1143 * gc.c
1144 */
1145int start_gc_thread(struct f2fs_sb_info *);
1146void stop_gc_thread(struct f2fs_sb_info *);
de93653f 1147block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
408e9375 1148int f2fs_gc(struct f2fs_sb_info *);
39a53e0c 1149void build_gc_manager(struct f2fs_sb_info *);
6e6093a8 1150int __init create_gc_caches(void);
39a53e0c
JK		 1151void destroy_gc_caches(void);
1152
1153/*
1154 * recovery.c
1155 */
6ead1142 1156int recover_fsync_data(struct f2fs_sb_info *);
39a53e0c
JK		 1157bool space_for_roll_forward(struct f2fs_sb_info *);
1158
1159/*
1160 * debug.c
1161 */
1162#ifdef CONFIG_F2FS_STAT_FS
1163struct f2fs_stat_info {
1164 struct list_head stat_list;
1165 struct f2fs_sb_info *sbi;
1166 struct mutex stat_lock;
1167 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1168 int main_area_segs, main_area_sections, main_area_zones;
1169 int hit_ext, total_ext;
1170 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1171 int nats, sits, fnids;
1172 int total_count, utilization;
1173 int bg_gc;
1174 unsigned int valid_count, valid_node_count, valid_inode_count;
1175 unsigned int bimodal, avg_vblocks;
1176 int util_free, util_valid, util_invalid;
1177 int rsvd_segs, overp_segs;
1178 int dirty_count, node_pages, meta_pages;
1179 int prefree_count, call_count;
1180 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1181 int tot_blks, data_blks, node_blks;
1182 int curseg[NR_CURSEG_TYPE];
1183 int cursec[NR_CURSEG_TYPE];
1184 int curzone[NR_CURSEG_TYPE];
1185
1186 unsigned int segment_count[2];
1187 unsigned int block_count[2];
1188 unsigned base_mem, cache_mem;
1189};
1190
963d4f7d
GZ		 1191static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1192{
1193 return (struct f2fs_stat_info*)sbi->stat_info;
1194}
1195
dcdfff65
JK		 1196#define stat_inc_call_count(si) ((si)->call_count++)
1197#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1198#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1199#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1200#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1201#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1202#define stat_inc_seg_type(sbi, curseg) \
1203 ((sbi)->segment_count[(curseg)->alloc_type]++)
1204#define stat_inc_block_count(sbi, curseg) \
1205 ((sbi)->block_count[(curseg)->alloc_type]++)
39a53e0c
JK		 1206
1207#define stat_inc_seg_count(sbi, type) \
1208 do { \
963d4f7d 1209 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1210 (si)->tot_segs++; \
1211 if (type == SUM_TYPE_DATA) \
1212 si->data_segs++; \
1213 else \
1214 si->node_segs++; \
1215 } while (0)
1216
1217#define stat_inc_tot_blk_count(si, blks) \
1218 (si->tot_blks += (blks))
1219
1220#define stat_inc_data_blk_count(sbi, blks) \
1221 do { \
963d4f7d 1222 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1223 stat_inc_tot_blk_count(si, blks); \
1224 si->data_blks += (blks); \
1225 } while (0)
1226
1227#define stat_inc_node_blk_count(sbi, blks) \
1228 do { \
963d4f7d 1229 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1230 stat_inc_tot_blk_count(si, blks); \
1231 si->node_blks += (blks); \
1232 } while (0)
1233
1234int f2fs_build_stats(struct f2fs_sb_info *);
1235void f2fs_destroy_stats(struct f2fs_sb_info *);
6e6093a8 1236void __init f2fs_create_root_stats(void);
4589d25d 1237void f2fs_destroy_root_stats(void);
39a53e0c
JK		 1238#else
1239#define stat_inc_call_count(si)
dcdfff65
JK		 1240#define stat_inc_bggc_count(si)
1241#define stat_inc_dirty_dir(sbi)
1242#define stat_dec_dirty_dir(sbi)
1243#define stat_inc_total_hit(sb)
1244#define stat_inc_read_hit(sb)
1245#define stat_inc_seg_type(sbi, curseg)
1246#define stat_inc_block_count(sbi, curseg)
39a53e0c
JK		 1247#define stat_inc_seg_count(si, type)
1248#define stat_inc_tot_blk_count(si, blks)
1249#define stat_inc_data_blk_count(si, blks)
1250#define stat_inc_node_blk_count(sbi, blks)
1251
1252static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1253static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
6e6093a8 1254static inline void __init f2fs_create_root_stats(void) { }
4589d25d 1255static inline void f2fs_destroy_root_stats(void) { }
39a53e0c
JK		 1256#endif
1257
1258extern const struct file_operations f2fs_dir_operations;
1259extern const struct file_operations f2fs_file_operations;
1260extern const struct inode_operations f2fs_file_inode_operations;
1261extern const struct address_space_operations f2fs_dblock_aops;
1262extern const struct address_space_operations f2fs_node_aops;
1263extern const struct address_space_operations f2fs_meta_aops;
1264extern const struct inode_operations f2fs_dir_inode_operations;
1265extern const struct inode_operations f2fs_symlink_inode_operations;
1266extern const struct inode_operations f2fs_special_inode_operations;
1267#endif