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f2fs: introduce sysfs entry to control in-place-update policy
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / fs / f2fs / f2fs.h
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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
1001b347 42#define F2FS_MOUNT_INLINE_DATA 0x00000100
39a53e0c
JK		 43
44#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
45#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
46#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
47
48#define ver_after(a, b) (typecheck(unsigned long long, a) && \
49 typecheck(unsigned long long, b) && \
50 ((long long)((a) - (b)) > 0))
51
a9841c4d
JK		 52typedef u32 block_t; /*
53 * should not change u32, since it is the on-disk block
54 * address format, __le32.
55 */
39a53e0c
JK		 56typedef u32 nid_t;
57
58struct f2fs_mount_info {
59 unsigned int opt;
60};
61
7e586fa0
JK		 62#define CRCPOLY_LE 0xedb88320
63
64static inline __u32 f2fs_crc32(void *buf, size_t len)
39a53e0c 65{
7e586fa0
JK		 66 unsigned char *p = (unsigned char *)buf;
67 __u32 crc = F2FS_SUPER_MAGIC;
68 int i;
69
70 while (len--) {
71 crc ^= *p++;
72 for (i = 0; i < 8; i++)
73 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
74 }
75 return crc;
39a53e0c
JK		 76}
77
7e586fa0 78static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
39a53e0c 79{
7e586fa0 80 return f2fs_crc32(buf, buf_size) == blk_crc;
39a53e0c
JK		 81}
82
83/*
84 * For checkpoint manager
85 */
86enum {
87 NAT_BITMAP,
88 SIT_BITMAP
89};
90
91/* for the list of orphan inodes */
92struct orphan_inode_entry {
93 struct list_head list; /* list head */
94 nid_t ino; /* inode number */
95};
96
97/* for the list of directory inodes */
98struct dir_inode_entry {
99 struct list_head list; /* list head */
100 struct inode *inode; /* vfs inode pointer */
101};
102
7fd9e544
JK		 103/* for the list of blockaddresses to be discarded */
104struct discard_entry {
105 struct list_head list; /* list head */
106 block_t blkaddr; /* block address to be discarded */
107 int len; /* # of consecutive blocks of the discard */
108};
109
39a53e0c
JK		 110/* for the list of fsync inodes, used only during recovery */
111struct fsync_inode_entry {
112 struct list_head list; /* list head */
113 struct inode *inode; /* vfs inode pointer */
114 block_t blkaddr; /* block address locating the last inode */
115};
116
117#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
118#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
119
120#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
121#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
122#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
123#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
124
125static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
126{
127 int before = nats_in_cursum(rs);
128 rs->n_nats = cpu_to_le16(before + i);
129 return before;
130}
131
132static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
133{
134 int before = sits_in_cursum(rs);
135 rs->n_sits = cpu_to_le16(before + i);
136 return before;
137}
138
e9750824
NJ		 139/*
140 * ioctl commands
141 */
142#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
143#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
144
145#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
146/*
147 * ioctl commands in 32 bit emulation
148 */
149#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
150#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
151#endif
152
39a53e0c
JK		 153/*
154 * For INODE and NODE manager
155 */
dbe6a5ff
JK		 156/*
157 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
158 * as its node offset to distinguish from index node blocks.
159 * But some bits are used to mark the node block.
160 */
161#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
162 >> OFFSET_BIT_SHIFT)
266e97a8
JK		 163enum {
164 ALLOC_NODE, /* allocate a new node page if needed */
165 LOOKUP_NODE, /* look up a node without readahead */
166 LOOKUP_NODE_RA, /*
167 * look up a node with readahead called
168 * by get_datablock_ro.
39a53e0c 169 */
266e97a8
JK		 170};
171
39a53e0c
JK		 172#define F2FS_LINK_MAX 32000 /* maximum link count per file */
173
174/* for in-memory extent cache entry */
c11abd1a
JK		 175#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
176
39a53e0c
JK		 177struct extent_info {
178 rwlock_t ext_lock; /* rwlock for consistency */
179 unsigned int fofs; /* start offset in a file */
180 u32 blk_addr; /* start block address of the extent */
111d2495 181 unsigned int len; /* length of the extent */
39a53e0c
JK		 182};
183
184/*
185 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
186 */
187#define FADVISE_COLD_BIT 0x01
354a3399 188#define FADVISE_LOST_PINO_BIT 0x02
39a53e0c
JK		 189
190struct f2fs_inode_info {
191 struct inode vfs_inode; /* serve a vfs inode */
192 unsigned long i_flags; /* keep an inode flags for ioctl */
193 unsigned char i_advise; /* use to give file attribute hints */
194 unsigned int i_current_depth; /* use only in directory structure */
6666e6aa 195 unsigned int i_pino; /* parent inode number */
39a53e0c
JK		 196 umode_t i_acl_mode; /* keep file acl mode temporarily */
197
198 /* Use below internally in f2fs*/
199 unsigned long flags; /* use to pass per-file flags */
39a53e0c
JK		 200 atomic_t dirty_dents; /* # of dirty dentry pages */
201 f2fs_hash_t chash; /* hash value of given file name */
202 unsigned int clevel; /* maximum level of given file name */
203 nid_t i_xattr_nid; /* node id that contains xattrs */
e518ff81 204 unsigned long long xattr_ver; /* cp version of xattr modification */
39a53e0c
JK		 205 struct extent_info ext; /* in-memory extent cache entry */
206};
207
208static inline void get_extent_info(struct extent_info *ext,
209 struct f2fs_extent i_ext)
210{
211 write_lock(&ext->ext_lock);
212 ext->fofs = le32_to_cpu(i_ext.fofs);
213 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
214 ext->len = le32_to_cpu(i_ext.len);
215 write_unlock(&ext->ext_lock);
216}
217
218static inline void set_raw_extent(struct extent_info *ext,
219 struct f2fs_extent *i_ext)
220{
221 read_lock(&ext->ext_lock);
222 i_ext->fofs = cpu_to_le32(ext->fofs);
223 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
224 i_ext->len = cpu_to_le32(ext->len);
225 read_unlock(&ext->ext_lock);
226}
227
228struct f2fs_nm_info {
229 block_t nat_blkaddr; /* base disk address of NAT */
230 nid_t max_nid; /* maximum possible node ids */
39a53e0c
JK		 231 nid_t next_scan_nid; /* the next nid to be scanned */
232
233 /* NAT cache management */
234 struct radix_tree_root nat_root;/* root of the nat entry cache */
235 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
236 unsigned int nat_cnt; /* the # of cached nat entries */
237 struct list_head nat_entries; /* cached nat entry list (clean) */
238 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
239
240 /* free node ids management */
241 struct list_head free_nid_list; /* a list for free nids */
242 spinlock_t free_nid_list_lock; /* protect free nid list */
243 unsigned int fcnt; /* the number of free node id */
244 struct mutex build_lock; /* lock for build free nids */
245
246 /* for checkpoint */
247 char *nat_bitmap; /* NAT bitmap pointer */
248 int bitmap_size; /* bitmap size */
249};
250
251/*
252 * this structure is used as one of function parameters.
253 * all the information are dedicated to a given direct node block determined
254 * by the data offset in a file.
255 */
256struct dnode_of_data {
257 struct inode *inode; /* vfs inode pointer */
258 struct page *inode_page; /* its inode page, NULL is possible */
259 struct page *node_page; /* cached direct node page */
260 nid_t nid; /* node id of the direct node block */
261 unsigned int ofs_in_node; /* data offset in the node page */
262 bool inode_page_locked; /* inode page is locked or not */
263 block_t data_blkaddr; /* block address of the node block */
264};
265
266static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
267 struct page *ipage, struct page *npage, nid_t nid)
268{
d66d1f76 269 memset(dn, 0, sizeof(*dn));
39a53e0c
JK		 270 dn->inode = inode;
271 dn->inode_page = ipage;
272 dn->node_page = npage;
273 dn->nid = nid;
39a53e0c
JK		 274}
275
276/*
277 * For SIT manager
278 *
279 * By default, there are 6 active log areas across the whole main area.
280 * When considering hot and cold data separation to reduce cleaning overhead,
281 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
282 * respectively.
283 * In the current design, you should not change the numbers intentionally.
284 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
285 * logs individually according to the underlying devices. (default: 6)
286 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
287 * data and 8 for node logs.
288 */
289#define NR_CURSEG_DATA_TYPE (3)
290#define NR_CURSEG_NODE_TYPE (3)
291#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
292
293enum {
294 CURSEG_HOT_DATA = 0, /* directory entry blocks */
295 CURSEG_WARM_DATA, /* data blocks */
296 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
297 CURSEG_HOT_NODE, /* direct node blocks of directory files */
298 CURSEG_WARM_NODE, /* direct node blocks of normal files */
299 CURSEG_COLD_NODE, /* indirect node blocks */
300 NO_CHECK_TYPE
301};
302
303struct f2fs_sm_info {
304 struct sit_info *sit_info; /* whole segment information */
305 struct free_segmap_info *free_info; /* free segment information */
306 struct dirty_seglist_info *dirty_info; /* dirty segment information */
307 struct curseg_info *curseg_array; /* active segment information */
308
309 struct list_head wblist_head; /* list of under-writeback pages */
310 spinlock_t wblist_lock; /* lock for checkpoint */
311
312 block_t seg0_blkaddr; /* block address of 0'th segment */
313 block_t main_blkaddr; /* start block address of main area */
314 block_t ssa_blkaddr; /* start block address of SSA area */
315
316 unsigned int segment_count; /* total # of segments */
317 unsigned int main_segments; /* # of segments in main area */
318 unsigned int reserved_segments; /* # of reserved segments */
319 unsigned int ovp_segments; /* # of overprovision segments */
81eb8d6e
JK		 320
321 /* a threshold to reclaim prefree segments */
322 unsigned int rec_prefree_segments;
7fd9e544
JK		 323
324 /* for small discard management */
325 struct list_head discard_list; /* 4KB discard list */
326 int nr_discards; /* # of discards in the list */
327 int max_discards; /* max. discards to be issued */
216fbd64
JK		 328
329 unsigned int ipu_policy; /* in-place-update policy */
330 unsigned int min_ipu_util; /* in-place-update threshold */
39a53e0c
JK		 331};
332
39a53e0c
JK		 333/*
334 * For superblock
335 */
336/*
337 * COUNT_TYPE for monitoring
338 *
339 * f2fs monitors the number of several block types such as on-writeback,
340 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
341 */
342enum count_type {
343 F2FS_WRITEBACK,
344 F2FS_DIRTY_DENTS,
345 F2FS_DIRTY_NODES,
346 F2FS_DIRTY_META,
347 NR_COUNT_TYPE,
348};
349
39a53e0c
JK		 350/*
351 * The below are the page types of bios used in submti_bio().
352 * The available types are:
353 * DATA User data pages. It operates as async mode.
354 * NODE Node pages. It operates as async mode.
355 * META FS metadata pages such as SIT, NAT, CP.
356 * NR_PAGE_TYPE The number of page types.
357 * META_FLUSH Make sure the previous pages are written
358 * with waiting the bio's completion
359 * ... Only can be used with META.
360 */
7d5e5109 361#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
39a53e0c
JK		 362enum page_type {
363 DATA,
364 NODE,
365 META,
366 NR_PAGE_TYPE,
367 META_FLUSH,
368};
369
458e6197
JK		 370struct f2fs_io_info {
371 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
372 int rw; /* contains R/RS/W/WS */
373 int rw_flag; /* contains REQ_META/REQ_PRIO */
374};
375
93dfe2ac 376#define is_read_io(rw) (((rw) & 1) == READ)
1ff7bd3b 377struct f2fs_bio_info {
458e6197 378 struct f2fs_sb_info *sbi; /* f2fs superblock */
1ff7bd3b
JK		 379 struct bio *bio; /* bios to merge */
380 sector_t last_block_in_bio; /* last block number */
458e6197 381 struct f2fs_io_info fio; /* store buffered io info. */
1ff7bd3b
JK		 382 struct mutex io_mutex; /* mutex for bio */
383};
384
39a53e0c
JK		 385struct f2fs_sb_info {
386 struct super_block *sb; /* pointer to VFS super block */
5e176d54 387 struct proc_dir_entry *s_proc; /* proc entry */
39a53e0c
JK		 388 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
389 struct f2fs_super_block *raw_super; /* raw super block pointer */
390 int s_dirty; /* dirty flag for checkpoint */
391
392 /* for node-related operations */
393 struct f2fs_nm_info *nm_info; /* node manager */
394 struct inode *node_inode; /* cache node blocks */
395
396 /* for segment-related operations */
397 struct f2fs_sm_info *sm_info; /* segment manager */
1ff7bd3b
JK		 398
399 /* for bio operations */
924b720b 400 struct f2fs_bio_info read_io; /* for read bios */
1ff7bd3b 401 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
39a53e0c
JK		 402
403 /* for checkpoint */
404 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
405 struct inode *meta_inode; /* cache meta blocks */
39936837 406 struct mutex cp_mutex; /* checkpoint procedure lock */
e479556b 407 struct rw_semaphore cp_rwsem; /* blocking FS operations */
39936837 408 struct mutex node_write; /* locking node writes */
39a53e0c 409 struct mutex writepages; /* mutex for writepages() */
aabe5136
HL		 410 bool por_doing; /* recovery is doing or not */
411 bool on_build_free_nids; /* build_free_nids is doing */
fb51b5ef 412 wait_queue_head_t cp_wait;
39a53e0c
JK		 413
414 /* for orphan inode management */
415 struct list_head orphan_inode_list; /* orphan inode list */
416 struct mutex orphan_inode_mutex; /* for orphan inode list */
417 unsigned int n_orphans; /* # of orphan inodes */
418
419 /* for directory inode management */
420 struct list_head dir_inode_list; /* dir inode list */
421 spinlock_t dir_inode_lock; /* for dir inode list lock */
39a53e0c
JK		 422
423 /* basic file system units */
424 unsigned int log_sectors_per_block; /* log2 sectors per block */
425 unsigned int log_blocksize; /* log2 block size */
426 unsigned int blocksize; /* block size */
427 unsigned int root_ino_num; /* root inode number*/
428 unsigned int node_ino_num; /* node inode number*/
429 unsigned int meta_ino_num; /* meta inode number*/
430 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
431 unsigned int blocks_per_seg; /* blocks per segment */
432 unsigned int segs_per_sec; /* segments per section */
433 unsigned int secs_per_zone; /* sections per zone */
434 unsigned int total_sections; /* total section count */
435 unsigned int total_node_count; /* total node block count */
436 unsigned int total_valid_node_count; /* valid node block count */
437 unsigned int total_valid_inode_count; /* valid inode count */
438 int active_logs; /* # of active logs */
439
440 block_t user_block_count; /* # of user blocks */
441 block_t total_valid_block_count; /* # of valid blocks */
442 block_t alloc_valid_block_count; /* # of allocated blocks */
443 block_t last_valid_block_count; /* for recovery */
444 u32 s_next_generation; /* for NFS support */
445 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
446
447 struct f2fs_mount_info mount_opt; /* mount options */
448
449 /* for cleaning operations */
450 struct mutex gc_mutex; /* mutex for GC */
451 struct f2fs_gc_kthread *gc_thread; /* GC thread */
5ec4e49f 452 unsigned int cur_victim_sec; /* current victim section num */
39a53e0c
JK		 453
454 /*
455 * for stat information.
456 * one is for the LFS mode, and the other is for the SSR mode.
457 */
35b09d82 458#ifdef CONFIG_F2FS_STAT_FS
39a53e0c
JK		 459 struct f2fs_stat_info *stat_info; /* FS status information */
460 unsigned int segment_count[2]; /* # of allocated segments */
461 unsigned int block_count[2]; /* # of allocated blocks */
39a53e0c
JK		 462 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
463 int bg_gc; /* background gc calls */
35b09d82
NJ		 464 unsigned int n_dirty_dirs; /* # of dir inodes */
465#endif
466 unsigned int last_victim[2]; /* last victim segment # */
39a53e0c 467 spinlock_t stat_lock; /* lock for stat operations */
b59d0bae
NJ		 468
469 /* For sysfs suppport */
470 struct kobject s_kobj;
471 struct completion s_kobj_unregister;
39a53e0c
JK		 472};
473
474/*
475 * Inline functions
476 */
477static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
478{
479 return container_of(inode, struct f2fs_inode_info, vfs_inode);
480}
481
482static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
483{
484 return sb->s_fs_info;
485}
486
487static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
488{
489 return (struct f2fs_super_block *)(sbi->raw_super);
490}
491
492static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
493{
494 return (struct f2fs_checkpoint *)(sbi->ckpt);
495}
496
45590710
GZ		 497static inline struct f2fs_node *F2FS_NODE(struct page *page)
498{
499 return (struct f2fs_node *)page_address(page);
500}
501
39a53e0c
JK		 502static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
503{
504 return (struct f2fs_nm_info *)(sbi->nm_info);
505}
506
507static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
508{
509 return (struct f2fs_sm_info *)(sbi->sm_info);
510}
511
512static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
513{
514 return (struct sit_info *)(SM_I(sbi)->sit_info);
515}
516
517static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
518{
519 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
520}
521
522static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
523{
524 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
525}
526
527static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
528{
529 sbi->s_dirty = 1;
530}
531
532static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
533{
534 sbi->s_dirty = 0;
535}
536
d71b5564
JK		 537static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
538{
539 return le64_to_cpu(cp->checkpoint_ver);
540}
541
25ca923b
JK		 542static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
543{
544 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
545 return ckpt_flags & f;
546}
547
548static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
549{
550 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
551 ckpt_flags |= f;
552 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
553}
554
555static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
556{
557 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
558 ckpt_flags &= (~f);
559 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
560}
561
e479556b 562static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
39936837 563{
e479556b 564 down_read(&sbi->cp_rwsem);
39936837
JK		 565}
566
e479556b 567static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
39a53e0c 568{
e479556b 569 up_read(&sbi->cp_rwsem);
39a53e0c
JK		 570}
571
e479556b 572static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
39a53e0c 573{
0daaad97 574 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
39936837
JK		 575}
576
e479556b 577static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
39936837 578{
e479556b 579 up_write(&sbi->cp_rwsem);
39a53e0c
JK		 580}
581
582/*
583 * Check whether the given nid is within node id range.
584 */
064e0823 585static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
39a53e0c 586{
064e0823 587 WARN_ON((nid >= NM_I(sbi)->max_nid));
cfb271d4 588 if (unlikely(nid >= NM_I(sbi)->max_nid))
064e0823
NJ		 589 return -EINVAL;
590 return 0;
39a53e0c
JK		 591}
592
593#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
594
595/*
596 * Check whether the inode has blocks or not
597 */
598static inline int F2FS_HAS_BLOCKS(struct inode *inode)
599{
600 if (F2FS_I(inode)->i_xattr_nid)
601 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
602 else
603 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
604}
605
606static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
607 struct inode *inode, blkcnt_t count)
608{
609 block_t valid_block_count;
610
611 spin_lock(&sbi->stat_lock);
612 valid_block_count =
613 sbi->total_valid_block_count + (block_t)count;
cfb271d4 614 if (unlikely(valid_block_count > sbi->user_block_count)) {
39a53e0c
JK		 615 spin_unlock(&sbi->stat_lock);
616 return false;
617 }
618 inode->i_blocks += count;
619 sbi->total_valid_block_count = valid_block_count;
620 sbi->alloc_valid_block_count += (block_t)count;
621 spin_unlock(&sbi->stat_lock);
622 return true;
623}
624
da19b0dc 625static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
39a53e0c
JK		 626 struct inode *inode,
627 blkcnt_t count)
628{
629 spin_lock(&sbi->stat_lock);
5d56b671
JK		 630 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
631 f2fs_bug_on(inode->i_blocks < count);
39a53e0c
JK		 632 inode->i_blocks -= count;
633 sbi->total_valid_block_count -= (block_t)count;
634 spin_unlock(&sbi->stat_lock);
39a53e0c
JK		 635}
636
637static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
638{
639 atomic_inc(&sbi->nr_pages[count_type]);
640 F2FS_SET_SB_DIRT(sbi);
641}
642
643static inline void inode_inc_dirty_dents(struct inode *inode)
644{
645 atomic_inc(&F2FS_I(inode)->dirty_dents);
646}
647
648static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
649{
650 atomic_dec(&sbi->nr_pages[count_type]);
651}
652
653static inline void inode_dec_dirty_dents(struct inode *inode)
654{
655 atomic_dec(&F2FS_I(inode)->dirty_dents);
656}
657
658static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
659{
660 return atomic_read(&sbi->nr_pages[count_type]);
661}
662
5ac206cf
NJ		 663static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
664{
665 unsigned int pages_per_sec = sbi->segs_per_sec *
666 (1 << sbi->log_blocks_per_seg);
667 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
668 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
669}
670
39a53e0c
JK		 671static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
672{
673 block_t ret;
674 spin_lock(&sbi->stat_lock);
675 ret = sbi->total_valid_block_count;
676 spin_unlock(&sbi->stat_lock);
677 return ret;
678}
679
680static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
681{
682 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
683
684 /* return NAT or SIT bitmap */
685 if (flag == NAT_BITMAP)
686 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
687 else if (flag == SIT_BITMAP)
688 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
689
690 return 0;
691}
692
693static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
694{
695 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
25ca923b
JK		 696 int offset = (flag == NAT_BITMAP) ?
697 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
39a53e0c
JK		 698 return &ckpt->sit_nat_version_bitmap + offset;
699}
700
701static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
702{
703 block_t start_addr;
704 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
d71b5564 705 unsigned long long ckpt_version = cur_cp_version(ckpt);
39a53e0c 706
25ca923b 707 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
39a53e0c
JK		 708
709 /*
710 * odd numbered checkpoint should at cp segment 0
711 * and even segent must be at cp segment 1
712 */
713 if (!(ckpt_version & 1))
714 start_addr += sbi->blocks_per_seg;
715
716 return start_addr;
717}
718
719static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
720{
721 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
722}
723
724static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 725 struct inode *inode)
39a53e0c
JK		 726{
727 block_t valid_block_count;
728 unsigned int valid_node_count;
729
730 spin_lock(&sbi->stat_lock);
731
ef86d709 732 valid_block_count = sbi->total_valid_block_count + 1;
cfb271d4 733 if (unlikely(valid_block_count > sbi->user_block_count)) {
39a53e0c
JK		 734 spin_unlock(&sbi->stat_lock);
735 return false;
736 }
737
ef86d709 738 valid_node_count = sbi->total_valid_node_count + 1;
cfb271d4 739 if (unlikely(valid_node_count > sbi->total_node_count)) {
39a53e0c
JK		 740 spin_unlock(&sbi->stat_lock);
741 return false;
742 }
743
744 if (inode)
ef86d709
GZ		 745 inode->i_blocks++;
746
747 sbi->alloc_valid_block_count++;
748 sbi->total_valid_node_count++;
749 sbi->total_valid_block_count++;
39a53e0c
JK		 750 spin_unlock(&sbi->stat_lock);
751
752 return true;
753}
754
755static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 756 struct inode *inode)
39a53e0c
JK		 757{
758 spin_lock(&sbi->stat_lock);
759
ef86d709
GZ		 760 f2fs_bug_on(!sbi->total_valid_block_count);
761 f2fs_bug_on(!sbi->total_valid_node_count);
762 f2fs_bug_on(!inode->i_blocks);
39a53e0c 763
ef86d709
GZ		 764 inode->i_blocks--;
765 sbi->total_valid_node_count--;
766 sbi->total_valid_block_count--;
39a53e0c
JK		 767
768 spin_unlock(&sbi->stat_lock);
769}
770
771static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
772{
773 unsigned int ret;
774 spin_lock(&sbi->stat_lock);
775 ret = sbi->total_valid_node_count;
776 spin_unlock(&sbi->stat_lock);
777 return ret;
778}
779
780static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
781{
782 spin_lock(&sbi->stat_lock);
5d56b671 783 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
39a53e0c
JK		 784 sbi->total_valid_inode_count++;
785 spin_unlock(&sbi->stat_lock);
786}
787
0e80220a 788static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
39a53e0c
JK		 789{
790 spin_lock(&sbi->stat_lock);
5d56b671 791 f2fs_bug_on(!sbi->total_valid_inode_count);
39a53e0c
JK		 792 sbi->total_valid_inode_count--;
793 spin_unlock(&sbi->stat_lock);
39a53e0c
JK		 794}
795
796static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
797{
798 unsigned int ret;
799 spin_lock(&sbi->stat_lock);
800 ret = sbi->total_valid_inode_count;
801 spin_unlock(&sbi->stat_lock);
802 return ret;
803}
804
805static inline void f2fs_put_page(struct page *page, int unlock)
806{
031fa8cc 807 if (!page)
39a53e0c
JK		 808 return;
809
810 if (unlock) {
5d56b671 811 f2fs_bug_on(!PageLocked(page));
39a53e0c
JK		 812 unlock_page(page);
813 }
814 page_cache_release(page);
815}
816
817static inline void f2fs_put_dnode(struct dnode_of_data *dn)
818{
819 if (dn->node_page)
820 f2fs_put_page(dn->node_page, 1);
821 if (dn->inode_page && dn->node_page != dn->inode_page)
822 f2fs_put_page(dn->inode_page, 0);
823 dn->node_page = NULL;
824 dn->inode_page = NULL;
825}
826
827static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
828 size_t size, void (*ctor)(void *))
829{
830 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
831}
832
7bd59381
GZ		 833static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
834 gfp_t flags)
835{
836 void *entry;
837retry:
838 entry = kmem_cache_alloc(cachep, flags);
839 if (!entry) {
840 cond_resched();
841 goto retry;
842 }
843
844 return entry;
845}
846
39a53e0c
JK		 847#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
848
849static inline bool IS_INODE(struct page *page)
850{
45590710 851 struct f2fs_node *p = F2FS_NODE(page);
39a53e0c
JK		 852 return RAW_IS_INODE(p);
853}
854
855static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
856{
857 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
858}
859
860static inline block_t datablock_addr(struct page *node_page,
861 unsigned int offset)
862{
863 struct f2fs_node *raw_node;
864 __le32 *addr_array;
45590710 865 raw_node = F2FS_NODE(node_page);
39a53e0c
JK		 866 addr_array = blkaddr_in_node(raw_node);
867 return le32_to_cpu(addr_array[offset]);
868}
869
870static inline int f2fs_test_bit(unsigned int nr, char *addr)
871{
872 int mask;
873
874 addr += (nr >> 3);
875 mask = 1 << (7 - (nr & 0x07));
876 return mask & *addr;
877}
878
879static inline int f2fs_set_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
891static inline int f2fs_clear_bit(unsigned int nr, char *addr)
892{
893 int mask;
894 int ret;
895
896 addr += (nr >> 3);
897 mask = 1 << (7 - (nr & 0x07));
898 ret = mask & *addr;
899 *addr &= ~mask;
900 return ret;
901}
902
903/* used for f2fs_inode_info->flags */
904enum {
905 FI_NEW_INODE, /* indicate newly allocated inode */
b3783873 906 FI_DIRTY_INODE, /* indicate inode is dirty or not */
39a53e0c
JK		 907 FI_INC_LINK, /* need to increment i_nlink */
908 FI_ACL_MODE, /* indicate acl mode */
909 FI_NO_ALLOC, /* should not allocate any blocks */
699489bb 910 FI_UPDATE_DIR, /* should update inode block for consistency */
74d0b917 911 FI_DELAY_IPUT, /* used for the recovery */
c11abd1a 912 FI_NO_EXTENT, /* not to use the extent cache */
444c580f 913 FI_INLINE_XATTR, /* used for inline xattr */
1001b347 914 FI_INLINE_DATA, /* used for inline data*/
39a53e0c
JK		 915};
916
917static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
918{
919 set_bit(flag, &fi->flags);
920}
921
922static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
923{
924 return test_bit(flag, &fi->flags);
925}
926
927static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
928{
929 clear_bit(flag, &fi->flags);
930}
931
932static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
933{
934 fi->i_acl_mode = mode;
935 set_inode_flag(fi, FI_ACL_MODE);
936}
937
938static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
939{
940 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
941 clear_inode_flag(fi, FI_ACL_MODE);
942 return 1;
943 }
944 return 0;
945}
946
444c580f
JK		 947static inline void get_inline_info(struct f2fs_inode_info *fi,
948 struct f2fs_inode *ri)
949{
950 if (ri->i_inline & F2FS_INLINE_XATTR)
951 set_inode_flag(fi, FI_INLINE_XATTR);
1001b347
HL		 952 if (ri->i_inline & F2FS_INLINE_DATA)
953 set_inode_flag(fi, FI_INLINE_DATA);
444c580f
JK		 954}
955
956static inline void set_raw_inline(struct f2fs_inode_info *fi,
957 struct f2fs_inode *ri)
958{
959 ri->i_inline = 0;
960
961 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
962 ri->i_inline |= F2FS_INLINE_XATTR;
1001b347
HL		 963 if (is_inode_flag_set(fi, FI_INLINE_DATA))
964 ri->i_inline |= F2FS_INLINE_DATA;
444c580f
JK		 965}
966
de93653f
JK		 967static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
968{
969 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
970 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
971 return DEF_ADDRS_PER_INODE;
972}
973
65985d93
JK		 974static inline void *inline_xattr_addr(struct page *page)
975{
976 struct f2fs_inode *ri;
977 ri = (struct f2fs_inode *)page_address(page);
978 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
979 F2FS_INLINE_XATTR_ADDRS]);
980}
981
982static inline int inline_xattr_size(struct inode *inode)
983{
984 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
985 return F2FS_INLINE_XATTR_ADDRS << 2;
986 else
987 return 0;
988}
989
1001b347
HL		 990static inline void *inline_data_addr(struct page *page)
991{
992 struct f2fs_inode *ri;
993 ri = (struct f2fs_inode *)page_address(page);
994 return (void *)&(ri->i_addr[1]);
995}
996
77888c1e
JK		 997static inline int f2fs_readonly(struct super_block *sb)
998{
999 return sb->s_flags & MS_RDONLY;
1000}
1001
39a53e0c
JK		 1002/*
1003 * file.c
1004 */
1005int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1006void truncate_data_blocks(struct dnode_of_data *);
1007void f2fs_truncate(struct inode *);
2d4d9fb5 1008int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
39a53e0c
JK		 1009int f2fs_setattr(struct dentry *, struct iattr *);
1010int truncate_hole(struct inode *, pgoff_t, pgoff_t);
b292dcab 1011int truncate_data_blocks_range(struct dnode_of_data *, int);
39a53e0c 1012long f2fs_ioctl(struct file *, unsigned int, unsigned long);
e9750824 1013long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
39a53e0c
JK		 1014
1015/*
1016 * inode.c
1017 */
1018void f2fs_set_inode_flags(struct inode *);
39a53e0c 1019struct inode *f2fs_iget(struct super_block *, unsigned long);
4660f9c0 1020int try_to_free_nats(struct f2fs_sb_info *, int);
39a53e0c 1021void update_inode(struct inode *, struct page *);
39936837 1022int update_inode_page(struct inode *);
39a53e0c
JK		 1023int f2fs_write_inode(struct inode *, struct writeback_control *);
1024void f2fs_evict_inode(struct inode *);
1025
1026/*
1027 * namei.c
1028 */
1029struct dentry *f2fs_get_parent(struct dentry *child);
1030
1031/*
1032 * dir.c
1033 */
1034struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1035 struct page **);
1036struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1037ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1038void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1039 struct page *, struct inode *);
1cd14caf 1040int update_dent_inode(struct inode *, const struct qstr *);
b7f7a5e0 1041int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
39a53e0c
JK		 1042void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1043int f2fs_make_empty(struct inode *, struct inode *);
1044bool f2fs_empty_dir(struct inode *);
1045
b7f7a5e0
AV		 1046static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1047{
1048 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1049 inode);
1050}
1051
39a53e0c
JK		 1052/*
1053 * super.c
1054 */
1055int f2fs_sync_fs(struct super_block *, int);
a07ef784
NJ		 1056extern __printf(3, 4)
1057void f2fs_msg(struct super_block *, const char *, const char *, ...);
39a53e0c
JK		 1058
1059/*
1060 * hash.c
1061 */
9836b8b9 1062f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
39a53e0c
JK		 1063
1064/*
1065 * node.c
1066 */
1067struct dnode_of_data;
1068struct node_info;
1069
1070int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1071void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1072int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1073int truncate_inode_blocks(struct inode *, pgoff_t);
4f16fb0f 1074int truncate_xattr_node(struct inode *, struct page *);
cfe58f9d 1075int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
58e674d6 1076void remove_inode_page(struct inode *);
44a83ff6 1077struct page *new_inode_page(struct inode *, const struct qstr *);
8ae8f162 1078struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
39a53e0c
JK		 1079void ra_node_page(struct f2fs_sb_info *, nid_t);
1080struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1081struct page *get_node_page_ra(struct page *, int);
1082void sync_inode_page(struct dnode_of_data *);
1083int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1084bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1085void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1086void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1087void recover_node_page(struct f2fs_sb_info *, struct page *,
1088 struct f2fs_summary *, struct node_info *, block_t);
1089int recover_inode_page(struct f2fs_sb_info *, struct page *);
1090int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1091 struct f2fs_summary_block *);
1092void flush_nat_entries(struct f2fs_sb_info *);
1093int build_node_manager(struct f2fs_sb_info *);
1094void destroy_node_manager(struct f2fs_sb_info *);
6e6093a8 1095int __init create_node_manager_caches(void);
39a53e0c
JK		 1096void destroy_node_manager_caches(void);
1097
1098/*
1099 * segment.c
1100 */
1101void f2fs_balance_fs(struct f2fs_sb_info *);
4660f9c0 1102void f2fs_balance_fs_bg(struct f2fs_sb_info *);
39a53e0c 1103void invalidate_blocks(struct f2fs_sb_info *, block_t);
39a53e0c
JK		 1104void clear_prefree_segments(struct f2fs_sb_info *);
1105int npages_for_summary_flush(struct f2fs_sb_info *);
1106void allocate_new_segments(struct f2fs_sb_info *);
1107struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
577e3495 1108void write_meta_page(struct f2fs_sb_info *, struct page *);
39a53e0c
JK		 1109void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1110 block_t, block_t *);
458e6197
JK		 1111void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1112 struct f2fs_io_info *);
1113void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
39a53e0c
JK		 1114void recover_data_page(struct f2fs_sb_info *, struct page *,
1115 struct f2fs_summary *, block_t, block_t);
1116void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1117 struct f2fs_summary *, block_t, block_t);
93dfe2ac 1118void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
39a53e0c
JK		 1119void write_data_summaries(struct f2fs_sb_info *, block_t);
1120void write_node_summaries(struct f2fs_sb_info *, block_t);
1121int lookup_journal_in_cursum(struct f2fs_summary_block *,
1122 int, unsigned int, int);
1123void flush_sit_entries(struct f2fs_sb_info *);
1124int build_segment_manager(struct f2fs_sb_info *);
39a53e0c 1125void destroy_segment_manager(struct f2fs_sb_info *);
7fd9e544
JK		 1126int __init create_segment_manager_caches(void);
1127void destroy_segment_manager_caches(void);
39a53e0c
JK		 1128
1129/*
1130 * checkpoint.c
1131 */
1132struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1133struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1134long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
cbd56e7d
JK		 1135int acquire_orphan_inode(struct f2fs_sb_info *);
1136void release_orphan_inode(struct f2fs_sb_info *);
39a53e0c
JK		 1137void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1138void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
8f99a946 1139void recover_orphan_inodes(struct f2fs_sb_info *);
39a53e0c
JK		 1140int get_valid_checkpoint(struct f2fs_sb_info *);
1141void set_dirty_dir_page(struct inode *, struct page *);
5deb8267 1142void add_dirty_dir_inode(struct inode *);
39a53e0c 1143void remove_dirty_dir_inode(struct inode *);
74d0b917 1144struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
39a53e0c 1145void sync_dirty_dir_inodes(struct f2fs_sb_info *);
43727527 1146void write_checkpoint(struct f2fs_sb_info *, bool);
39a53e0c 1147void init_orphan_info(struct f2fs_sb_info *);
6e6093a8 1148int __init create_checkpoint_caches(void);
39a53e0c
JK		 1149void destroy_checkpoint_caches(void);
1150
1151/*
1152 * data.c
1153 */
458e6197 1154void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
93dfe2ac
JK		 1155int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1156void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
458e6197 1157 struct f2fs_io_info *);
39a53e0c 1158int reserve_new_block(struct dnode_of_data *);
b600965c 1159int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
39a53e0c 1160void update_extent_cache(block_t, struct dnode_of_data *);
c718379b 1161struct page *find_data_page(struct inode *, pgoff_t, bool);
39a53e0c 1162struct page *get_lock_data_page(struct inode *, pgoff_t);
64aa7ed9 1163struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
458e6197 1164int do_write_data_page(struct page *, struct f2fs_io_info *);
39a53e0c
JK		 1165
1166/*
1167 * gc.c
1168 */
1169int start_gc_thread(struct f2fs_sb_info *);
1170void stop_gc_thread(struct f2fs_sb_info *);
de93653f 1171block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
408e9375 1172int f2fs_gc(struct f2fs_sb_info *);
39a53e0c 1173void build_gc_manager(struct f2fs_sb_info *);
6e6093a8 1174int __init create_gc_caches(void);
39a53e0c
JK		 1175void destroy_gc_caches(void);
1176
1177/*
1178 * recovery.c
1179 */
6ead1142 1180int recover_fsync_data(struct f2fs_sb_info *);
39a53e0c
JK		 1181bool space_for_roll_forward(struct f2fs_sb_info *);
1182
1183/*
1184 * debug.c
1185 */
1186#ifdef CONFIG_F2FS_STAT_FS
1187struct f2fs_stat_info {
1188 struct list_head stat_list;
1189 struct f2fs_sb_info *sbi;
1190 struct mutex stat_lock;
1191 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1192 int main_area_segs, main_area_sections, main_area_zones;
1193 int hit_ext, total_ext;
1194 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1195 int nats, sits, fnids;
1196 int total_count, utilization;
1197 int bg_gc;
1198 unsigned int valid_count, valid_node_count, valid_inode_count;
1199 unsigned int bimodal, avg_vblocks;
1200 int util_free, util_valid, util_invalid;
1201 int rsvd_segs, overp_segs;
1202 int dirty_count, node_pages, meta_pages;
1203 int prefree_count, call_count;
1204 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1205 int tot_blks, data_blks, node_blks;
1206 int curseg[NR_CURSEG_TYPE];
1207 int cursec[NR_CURSEG_TYPE];
1208 int curzone[NR_CURSEG_TYPE];
1209
1210 unsigned int segment_count[2];
1211 unsigned int block_count[2];
1212 unsigned base_mem, cache_mem;
1213};
1214
963d4f7d
GZ		 1215static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1216{
1217 return (struct f2fs_stat_info*)sbi->stat_info;
1218}
1219
dcdfff65
JK		 1220#define stat_inc_call_count(si) ((si)->call_count++)
1221#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1222#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1223#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1224#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1225#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1226#define stat_inc_seg_type(sbi, curseg) \
1227 ((sbi)->segment_count[(curseg)->alloc_type]++)
1228#define stat_inc_block_count(sbi, curseg) \
1229 ((sbi)->block_count[(curseg)->alloc_type]++)
39a53e0c
JK		 1230
1231#define stat_inc_seg_count(sbi, type) \
1232 do { \
963d4f7d 1233 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1234 (si)->tot_segs++; \
1235 if (type == SUM_TYPE_DATA) \
1236 si->data_segs++; \
1237 else \
1238 si->node_segs++; \
1239 } while (0)
1240
1241#define stat_inc_tot_blk_count(si, blks) \
1242 (si->tot_blks += (blks))
1243
1244#define stat_inc_data_blk_count(sbi, blks) \
1245 do { \
963d4f7d 1246 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1247 stat_inc_tot_blk_count(si, blks); \
1248 si->data_blks += (blks); \
1249 } while (0)
1250
1251#define stat_inc_node_blk_count(sbi, blks) \
1252 do { \
963d4f7d 1253 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1254 stat_inc_tot_blk_count(si, blks); \
1255 si->node_blks += (blks); \
1256 } while (0)
1257
1258int f2fs_build_stats(struct f2fs_sb_info *);
1259void f2fs_destroy_stats(struct f2fs_sb_info *);
6e6093a8 1260void __init f2fs_create_root_stats(void);
4589d25d 1261void f2fs_destroy_root_stats(void);
39a53e0c
JK		 1262#else
1263#define stat_inc_call_count(si)
dcdfff65
JK		 1264#define stat_inc_bggc_count(si)
1265#define stat_inc_dirty_dir(sbi)
1266#define stat_dec_dirty_dir(sbi)
1267#define stat_inc_total_hit(sb)
1268#define stat_inc_read_hit(sb)
1269#define stat_inc_seg_type(sbi, curseg)
1270#define stat_inc_block_count(sbi, curseg)
39a53e0c
JK		 1271#define stat_inc_seg_count(si, type)
1272#define stat_inc_tot_blk_count(si, blks)
1273#define stat_inc_data_blk_count(si, blks)
1274#define stat_inc_node_blk_count(sbi, blks)
1275
1276static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1277static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
6e6093a8 1278static inline void __init f2fs_create_root_stats(void) { }
4589d25d 1279static inline void f2fs_destroy_root_stats(void) { }
39a53e0c
JK		 1280#endif
1281
1282extern const struct file_operations f2fs_dir_operations;
1283extern const struct file_operations f2fs_file_operations;
1284extern const struct inode_operations f2fs_file_inode_operations;
1285extern const struct address_space_operations f2fs_dblock_aops;
1286extern const struct address_space_operations f2fs_node_aops;
1287extern const struct address_space_operations f2fs_meta_aops;
1288extern const struct inode_operations f2fs_dir_inode_operations;
1289extern const struct inode_operations f2fs_symlink_inode_operations;
1290extern const struct inode_operations f2fs_special_inode_operations;
1001b347 1291
39a53e0c 1292#endif