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Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09002 * 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>
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090017#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
20
21/*
22 * For mount options
23 */
24#define F2FS_MOUNT_BG_GC 0x00000001
25#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
26#define F2FS_MOUNT_DISCARD 0x00000004
27#define F2FS_MOUNT_NOHEAP 0x00000008
28#define F2FS_MOUNT_XATTR_USER 0x00000010
29#define F2FS_MOUNT_POSIX_ACL 0x00000020
30#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
31
32#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
33#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
34#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
35
36#define ver_after(a, b) (typecheck(unsigned long long, a) && \
37 typecheck(unsigned long long, b) && \
38 ((long long)((a) - (b)) > 0))
39
Jaegeuk Kima9841c42013-05-24 12:41:04 +090040typedef u32 block_t; /*
41 * should not change u32, since it is the on-disk block
42 * address format, __le32.
43 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090044typedef u32 nid_t;
45
46struct f2fs_mount_info {
47 unsigned int opt;
48};
49
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090050#define CRCPOLY_LE 0xedb88320
51
52static inline __u32 f2fs_crc32(void *buf, size_t len)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090053{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090054 unsigned char *p = (unsigned char *)buf;
55 __u32 crc = F2FS_SUPER_MAGIC;
56 int i;
57
58 while (len--) {
59 crc ^= *p++;
60 for (i = 0; i < 8; i++)
61 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
62 }
63 return crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090064}
65
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090066static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090067{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090068 return f2fs_crc32(buf, buf_size) == blk_crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090069}
70
71/*
72 * For checkpoint manager
73 */
74enum {
75 NAT_BITMAP,
76 SIT_BITMAP
77};
78
79/* for the list of orphan inodes */
80struct orphan_inode_entry {
81 struct list_head list; /* list head */
82 nid_t ino; /* inode number */
83};
84
85/* for the list of directory inodes */
86struct dir_inode_entry {
87 struct list_head list; /* list head */
88 struct inode *inode; /* vfs inode pointer */
89};
90
91/* for the list of fsync inodes, used only during recovery */
92struct fsync_inode_entry {
93 struct list_head list; /* list head */
94 struct inode *inode; /* vfs inode pointer */
95 block_t blkaddr; /* block address locating the last inode */
96};
97
98#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
99#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
100
101#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
102#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
103#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
104#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
105
106static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
107{
108 int before = nats_in_cursum(rs);
109 rs->n_nats = cpu_to_le16(before + i);
110 return before;
111}
112
113static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
114{
115 int before = sits_in_cursum(rs);
116 rs->n_sits = cpu_to_le16(before + i);
117 return before;
118}
119
120/*
Namjae Jeone9750822013-02-04 23:41:41 +0900121 * ioctl commands
122 */
123#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
124#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
125
126#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
127/*
128 * ioctl commands in 32 bit emulation
129 */
130#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
131#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
132#endif
133
134/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900135 * For INODE and NODE manager
136 */
137#define XATTR_NODE_OFFSET (-1) /*
138 * store xattrs to one node block per
139 * file keeping -1 as its node offset to
140 * distinguish from index node blocks.
141 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900142enum {
143 ALLOC_NODE, /* allocate a new node page if needed */
144 LOOKUP_NODE, /* look up a node without readahead */
145 LOOKUP_NODE_RA, /*
146 * look up a node with readahead called
147 * by get_datablock_ro.
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900148 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900149};
150
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900151#define F2FS_LINK_MAX 32000 /* maximum link count per file */
152
153/* for in-memory extent cache entry */
154struct extent_info {
155 rwlock_t ext_lock; /* rwlock for consistency */
156 unsigned int fofs; /* start offset in a file */
157 u32 blk_addr; /* start block address of the extent */
Masanari Iida111d2492013-03-19 08:03:35 +0900158 unsigned int len; /* length of the extent */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900159};
160
161/*
162 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
163 */
164#define FADVISE_COLD_BIT 0x01
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900165#define FADVISE_LOST_PINO_BIT 0x02
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900166
167struct f2fs_inode_info {
168 struct inode vfs_inode; /* serve a vfs inode */
169 unsigned long i_flags; /* keep an inode flags for ioctl */
170 unsigned char i_advise; /* use to give file attribute hints */
171 unsigned int i_current_depth; /* use only in directory structure */
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900172 unsigned int i_pino; /* parent inode number */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900173 umode_t i_acl_mode; /* keep file acl mode temporarily */
174
175 /* Use below internally in f2fs*/
176 unsigned long flags; /* use to pass per-file flags */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900177 atomic_t dirty_dents; /* # of dirty dentry pages */
178 f2fs_hash_t chash; /* hash value of given file name */
179 unsigned int clevel; /* maximum level of given file name */
180 nid_t i_xattr_nid; /* node id that contains xattrs */
181 struct extent_info ext; /* in-memory extent cache entry */
182};
183
184static inline void get_extent_info(struct extent_info *ext,
185 struct f2fs_extent i_ext)
186{
187 write_lock(&ext->ext_lock);
188 ext->fofs = le32_to_cpu(i_ext.fofs);
189 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
190 ext->len = le32_to_cpu(i_ext.len);
191 write_unlock(&ext->ext_lock);
192}
193
194static inline void set_raw_extent(struct extent_info *ext,
195 struct f2fs_extent *i_ext)
196{
197 read_lock(&ext->ext_lock);
198 i_ext->fofs = cpu_to_le32(ext->fofs);
199 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
200 i_ext->len = cpu_to_le32(ext->len);
201 read_unlock(&ext->ext_lock);
202}
203
204struct f2fs_nm_info {
205 block_t nat_blkaddr; /* base disk address of NAT */
206 nid_t max_nid; /* maximum possible node ids */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900207 nid_t next_scan_nid; /* the next nid to be scanned */
208
209 /* NAT cache management */
210 struct radix_tree_root nat_root;/* root of the nat entry cache */
211 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
212 unsigned int nat_cnt; /* the # of cached nat entries */
213 struct list_head nat_entries; /* cached nat entry list (clean) */
214 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
215
216 /* free node ids management */
217 struct list_head free_nid_list; /* a list for free nids */
218 spinlock_t free_nid_list_lock; /* protect free nid list */
219 unsigned int fcnt; /* the number of free node id */
220 struct mutex build_lock; /* lock for build free nids */
221
222 /* for checkpoint */
223 char *nat_bitmap; /* NAT bitmap pointer */
224 int bitmap_size; /* bitmap size */
225};
226
227/*
228 * this structure is used as one of function parameters.
229 * all the information are dedicated to a given direct node block determined
230 * by the data offset in a file.
231 */
232struct dnode_of_data {
233 struct inode *inode; /* vfs inode pointer */
234 struct page *inode_page; /* its inode page, NULL is possible */
235 struct page *node_page; /* cached direct node page */
236 nid_t nid; /* node id of the direct node block */
237 unsigned int ofs_in_node; /* data offset in the node page */
238 bool inode_page_locked; /* inode page is locked or not */
239 block_t data_blkaddr; /* block address of the node block */
240};
241
242static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
243 struct page *ipage, struct page *npage, nid_t nid)
244{
Jaegeuk Kimd66d1f72013-01-03 08:57:21 +0900245 memset(dn, 0, sizeof(*dn));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900246 dn->inode = inode;
247 dn->inode_page = ipage;
248 dn->node_page = npage;
249 dn->nid = nid;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900250}
251
252/*
253 * For SIT manager
254 *
255 * By default, there are 6 active log areas across the whole main area.
256 * When considering hot and cold data separation to reduce cleaning overhead,
257 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
258 * respectively.
259 * In the current design, you should not change the numbers intentionally.
260 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
261 * logs individually according to the underlying devices. (default: 6)
262 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
263 * data and 8 for node logs.
264 */
265#define NR_CURSEG_DATA_TYPE (3)
266#define NR_CURSEG_NODE_TYPE (3)
267#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
268
269enum {
270 CURSEG_HOT_DATA = 0, /* directory entry blocks */
271 CURSEG_WARM_DATA, /* data blocks */
272 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
273 CURSEG_HOT_NODE, /* direct node blocks of directory files */
274 CURSEG_WARM_NODE, /* direct node blocks of normal files */
275 CURSEG_COLD_NODE, /* indirect node blocks */
276 NO_CHECK_TYPE
277};
278
279struct f2fs_sm_info {
280 struct sit_info *sit_info; /* whole segment information */
281 struct free_segmap_info *free_info; /* free segment information */
282 struct dirty_seglist_info *dirty_info; /* dirty segment information */
283 struct curseg_info *curseg_array; /* active segment information */
284
285 struct list_head wblist_head; /* list of under-writeback pages */
286 spinlock_t wblist_lock; /* lock for checkpoint */
287
288 block_t seg0_blkaddr; /* block address of 0'th segment */
289 block_t main_blkaddr; /* start block address of main area */
290 block_t ssa_blkaddr; /* start block address of SSA area */
291
292 unsigned int segment_count; /* total # of segments */
293 unsigned int main_segments; /* # of segments in main area */
294 unsigned int reserved_segments; /* # of reserved segments */
295 unsigned int ovp_segments; /* # of overprovision segments */
296};
297
298/*
299 * For directory operation
300 */
301#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
302#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
303#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
304#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
305#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
306
307/*
308 * For superblock
309 */
310/*
311 * COUNT_TYPE for monitoring
312 *
313 * f2fs monitors the number of several block types such as on-writeback,
314 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
315 */
316enum count_type {
317 F2FS_WRITEBACK,
318 F2FS_DIRTY_DENTS,
319 F2FS_DIRTY_NODES,
320 F2FS_DIRTY_META,
321 NR_COUNT_TYPE,
322};
323
324/*
Jaegeuk Kim39936832012-11-22 16:21:29 +0900325 * Uses as sbi->fs_lock[NR_GLOBAL_LOCKS].
326 * The checkpoint procedure blocks all the locks in this fs_lock array.
327 * Some FS operations grab free locks, and if there is no free lock,
328 * then wait to grab a lock in a round-robin manner.
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900329 */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900330#define NR_GLOBAL_LOCKS 8
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900331
332/*
333 * The below are the page types of bios used in submti_bio().
334 * The available types are:
335 * DATA User data pages. It operates as async mode.
336 * NODE Node pages. It operates as async mode.
337 * META FS metadata pages such as SIT, NAT, CP.
338 * NR_PAGE_TYPE The number of page types.
339 * META_FLUSH Make sure the previous pages are written
340 * with waiting the bio's completion
341 * ... Only can be used with META.
342 */
343enum page_type {
344 DATA,
345 NODE,
346 META,
347 NR_PAGE_TYPE,
348 META_FLUSH,
349};
350
351struct f2fs_sb_info {
352 struct super_block *sb; /* pointer to VFS super block */
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900353 struct proc_dir_entry *s_proc; /* proc entry */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900354 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
355 struct f2fs_super_block *raw_super; /* raw super block pointer */
356 int s_dirty; /* dirty flag for checkpoint */
357
358 /* for node-related operations */
359 struct f2fs_nm_info *nm_info; /* node manager */
360 struct inode *node_inode; /* cache node blocks */
361
362 /* for segment-related operations */
363 struct f2fs_sm_info *sm_info; /* segment manager */
364 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */
365 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */
366 struct rw_semaphore bio_sem; /* IO semaphore */
367
368 /* for checkpoint */
369 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
370 struct inode *meta_inode; /* cache meta blocks */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900371 struct mutex cp_mutex; /* checkpoint procedure lock */
372 struct mutex fs_lock[NR_GLOBAL_LOCKS]; /* blocking FS operations */
373 struct mutex node_write; /* locking node writes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900374 struct mutex writepages; /* mutex for writepages() */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900375 unsigned char next_lock_num; /* round-robin global locks */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900376 int por_doing; /* recovery is doing or not */
Jaegeuk Kim55008d82013-04-25 16:05:51 +0900377 int on_build_free_nids; /* build_free_nids is doing */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900378
379 /* for orphan inode management */
380 struct list_head orphan_inode_list; /* orphan inode list */
381 struct mutex orphan_inode_mutex; /* for orphan inode list */
382 unsigned int n_orphans; /* # of orphan inodes */
383
384 /* for directory inode management */
385 struct list_head dir_inode_list; /* dir inode list */
386 spinlock_t dir_inode_lock; /* for dir inode list lock */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900387
388 /* basic file system units */
389 unsigned int log_sectors_per_block; /* log2 sectors per block */
390 unsigned int log_blocksize; /* log2 block size */
391 unsigned int blocksize; /* block size */
392 unsigned int root_ino_num; /* root inode number*/
393 unsigned int node_ino_num; /* node inode number*/
394 unsigned int meta_ino_num; /* meta inode number*/
395 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
396 unsigned int blocks_per_seg; /* blocks per segment */
397 unsigned int segs_per_sec; /* segments per section */
398 unsigned int secs_per_zone; /* sections per zone */
399 unsigned int total_sections; /* total section count */
400 unsigned int total_node_count; /* total node block count */
401 unsigned int total_valid_node_count; /* valid node block count */
402 unsigned int total_valid_inode_count; /* valid inode count */
403 int active_logs; /* # of active logs */
404
405 block_t user_block_count; /* # of user blocks */
406 block_t total_valid_block_count; /* # of valid blocks */
407 block_t alloc_valid_block_count; /* # of allocated blocks */
408 block_t last_valid_block_count; /* for recovery */
409 u32 s_next_generation; /* for NFS support */
410 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
411
412 struct f2fs_mount_info mount_opt; /* mount options */
413
414 /* for cleaning operations */
415 struct mutex gc_mutex; /* mutex for GC */
416 struct f2fs_gc_kthread *gc_thread; /* GC thread */
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900417 unsigned int cur_victim_sec; /* current victim section num */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900418
419 /*
420 * for stat information.
421 * one is for the LFS mode, and the other is for the SSR mode.
422 */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900423#ifdef CONFIG_F2FS_STAT_FS
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900424 struct f2fs_stat_info *stat_info; /* FS status information */
425 unsigned int segment_count[2]; /* # of allocated segments */
426 unsigned int block_count[2]; /* # of allocated blocks */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900427 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
428 int bg_gc; /* background gc calls */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900429 unsigned int n_dirty_dirs; /* # of dir inodes */
430#endif
431 unsigned int last_victim[2]; /* last victim segment # */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900432 spinlock_t stat_lock; /* lock for stat operations */
433};
434
435/*
436 * Inline functions
437 */
438static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
439{
440 return container_of(inode, struct f2fs_inode_info, vfs_inode);
441}
442
443static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
444{
445 return sb->s_fs_info;
446}
447
448static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
449{
450 return (struct f2fs_super_block *)(sbi->raw_super);
451}
452
453static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
454{
455 return (struct f2fs_checkpoint *)(sbi->ckpt);
456}
457
458static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
459{
460 return (struct f2fs_nm_info *)(sbi->nm_info);
461}
462
463static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
464{
465 return (struct f2fs_sm_info *)(sbi->sm_info);
466}
467
468static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
469{
470 return (struct sit_info *)(SM_I(sbi)->sit_info);
471}
472
473static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
474{
475 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
476}
477
478static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
479{
480 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
481}
482
483static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
484{
485 sbi->s_dirty = 1;
486}
487
488static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
489{
490 sbi->s_dirty = 0;
491}
492
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900493static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
494{
495 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
496 return ckpt_flags & f;
497}
498
499static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
500{
501 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
502 ckpt_flags |= f;
503 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
504}
505
506static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
507{
508 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
509 ckpt_flags &= (~f);
510 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
511}
512
Jaegeuk Kim39936832012-11-22 16:21:29 +0900513static inline void mutex_lock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900514{
Peter Zijlstrabfe35962013-05-16 20:03:12 +0200515 int i;
516
517 for (i = 0; i < NR_GLOBAL_LOCKS; i++) {
518 /*
519 * This is the only time we take multiple fs_lock[]
520 * instances; the order is immaterial since we
521 * always hold cp_mutex, which serializes multiple
522 * such operations.
523 */
524 mutex_lock_nest_lock(&sbi->fs_lock[i], &sbi->cp_mutex);
525 }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900526}
527
Jaegeuk Kim39936832012-11-22 16:21:29 +0900528static inline void mutex_unlock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900529{
Jaegeuk Kim39936832012-11-22 16:21:29 +0900530 int i = 0;
531 for (; i < NR_GLOBAL_LOCKS; i++)
532 mutex_unlock(&sbi->fs_lock[i]);
533}
534
535static inline int mutex_lock_op(struct f2fs_sb_info *sbi)
536{
537 unsigned char next_lock = sbi->next_lock_num % NR_GLOBAL_LOCKS;
538 int i = 0;
539
540 for (; i < NR_GLOBAL_LOCKS; i++)
541 if (mutex_trylock(&sbi->fs_lock[i]))
542 return i;
543
544 mutex_lock(&sbi->fs_lock[next_lock]);
545 sbi->next_lock_num++;
546 return next_lock;
547}
548
549static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, int ilock)
550{
551 if (ilock < 0)
552 return;
553 BUG_ON(ilock >= NR_GLOBAL_LOCKS);
554 mutex_unlock(&sbi->fs_lock[ilock]);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900555}
556
557/*
558 * Check whether the given nid is within node id range.
559 */
Namjae Jeon064e0822013-03-17 17:27:20 +0900560static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900561{
Namjae Jeon064e0822013-03-17 17:27:20 +0900562 WARN_ON((nid >= NM_I(sbi)->max_nid));
563 if (nid >= NM_I(sbi)->max_nid)
564 return -EINVAL;
565 return 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900566}
567
568#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
569
570/*
571 * Check whether the inode has blocks or not
572 */
573static inline int F2FS_HAS_BLOCKS(struct inode *inode)
574{
575 if (F2FS_I(inode)->i_xattr_nid)
576 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
577 else
578 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
579}
580
581static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
582 struct inode *inode, blkcnt_t count)
583{
584 block_t valid_block_count;
585
586 spin_lock(&sbi->stat_lock);
587 valid_block_count =
588 sbi->total_valid_block_count + (block_t)count;
589 if (valid_block_count > sbi->user_block_count) {
590 spin_unlock(&sbi->stat_lock);
591 return false;
592 }
593 inode->i_blocks += count;
594 sbi->total_valid_block_count = valid_block_count;
595 sbi->alloc_valid_block_count += (block_t)count;
596 spin_unlock(&sbi->stat_lock);
597 return true;
598}
599
600static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
601 struct inode *inode,
602 blkcnt_t count)
603{
604 spin_lock(&sbi->stat_lock);
605 BUG_ON(sbi->total_valid_block_count < (block_t) count);
606 BUG_ON(inode->i_blocks < count);
607 inode->i_blocks -= count;
608 sbi->total_valid_block_count -= (block_t)count;
609 spin_unlock(&sbi->stat_lock);
610 return 0;
611}
612
613static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
614{
615 atomic_inc(&sbi->nr_pages[count_type]);
616 F2FS_SET_SB_DIRT(sbi);
617}
618
619static inline void inode_inc_dirty_dents(struct inode *inode)
620{
621 atomic_inc(&F2FS_I(inode)->dirty_dents);
622}
623
624static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
625{
626 atomic_dec(&sbi->nr_pages[count_type]);
627}
628
629static inline void inode_dec_dirty_dents(struct inode *inode)
630{
631 atomic_dec(&F2FS_I(inode)->dirty_dents);
632}
633
634static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
635{
636 return atomic_read(&sbi->nr_pages[count_type]);
637}
638
Namjae Jeon5ac206c2013-02-02 23:52:59 +0900639static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
640{
641 unsigned int pages_per_sec = sbi->segs_per_sec *
642 (1 << sbi->log_blocks_per_seg);
643 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
644 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
645}
646
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900647static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
648{
649 block_t ret;
650 spin_lock(&sbi->stat_lock);
651 ret = sbi->total_valid_block_count;
652 spin_unlock(&sbi->stat_lock);
653 return ret;
654}
655
656static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
657{
658 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
659
660 /* return NAT or SIT bitmap */
661 if (flag == NAT_BITMAP)
662 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
663 else if (flag == SIT_BITMAP)
664 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
665
666 return 0;
667}
668
669static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
670{
671 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900672 int offset = (flag == NAT_BITMAP) ?
673 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900674 return &ckpt->sit_nat_version_bitmap + offset;
675}
676
677static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
678{
679 block_t start_addr;
680 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
681 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
682
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900683 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900684
685 /*
686 * odd numbered checkpoint should at cp segment 0
687 * and even segent must be at cp segment 1
688 */
689 if (!(ckpt_version & 1))
690 start_addr += sbi->blocks_per_seg;
691
692 return start_addr;
693}
694
695static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
696{
697 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
698}
699
700static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
701 struct inode *inode,
702 unsigned int count)
703{
704 block_t valid_block_count;
705 unsigned int valid_node_count;
706
707 spin_lock(&sbi->stat_lock);
708
709 valid_block_count = sbi->total_valid_block_count + (block_t)count;
710 sbi->alloc_valid_block_count += (block_t)count;
711 valid_node_count = sbi->total_valid_node_count + count;
712
713 if (valid_block_count > sbi->user_block_count) {
714 spin_unlock(&sbi->stat_lock);
715 return false;
716 }
717
718 if (valid_node_count > sbi->total_node_count) {
719 spin_unlock(&sbi->stat_lock);
720 return false;
721 }
722
723 if (inode)
724 inode->i_blocks += count;
725 sbi->total_valid_node_count = valid_node_count;
726 sbi->total_valid_block_count = valid_block_count;
727 spin_unlock(&sbi->stat_lock);
728
729 return true;
730}
731
732static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
733 struct inode *inode,
734 unsigned int count)
735{
736 spin_lock(&sbi->stat_lock);
737
738 BUG_ON(sbi->total_valid_block_count < count);
739 BUG_ON(sbi->total_valid_node_count < count);
740 BUG_ON(inode->i_blocks < count);
741
742 inode->i_blocks -= count;
743 sbi->total_valid_node_count -= count;
744 sbi->total_valid_block_count -= (block_t)count;
745
746 spin_unlock(&sbi->stat_lock);
747}
748
749static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
750{
751 unsigned int ret;
752 spin_lock(&sbi->stat_lock);
753 ret = sbi->total_valid_node_count;
754 spin_unlock(&sbi->stat_lock);
755 return ret;
756}
757
758static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
759{
760 spin_lock(&sbi->stat_lock);
761 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
762 sbi->total_valid_inode_count++;
763 spin_unlock(&sbi->stat_lock);
764}
765
766static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
767{
768 spin_lock(&sbi->stat_lock);
769 BUG_ON(!sbi->total_valid_inode_count);
770 sbi->total_valid_inode_count--;
771 spin_unlock(&sbi->stat_lock);
772 return 0;
773}
774
775static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
776{
777 unsigned int ret;
778 spin_lock(&sbi->stat_lock);
779 ret = sbi->total_valid_inode_count;
780 spin_unlock(&sbi->stat_lock);
781 return ret;
782}
783
784static inline void f2fs_put_page(struct page *page, int unlock)
785{
786 if (!page || IS_ERR(page))
787 return;
788
789 if (unlock) {
790 BUG_ON(!PageLocked(page));
791 unlock_page(page);
792 }
793 page_cache_release(page);
794}
795
796static inline void f2fs_put_dnode(struct dnode_of_data *dn)
797{
798 if (dn->node_page)
799 f2fs_put_page(dn->node_page, 1);
800 if (dn->inode_page && dn->node_page != dn->inode_page)
801 f2fs_put_page(dn->inode_page, 0);
802 dn->node_page = NULL;
803 dn->inode_page = NULL;
804}
805
806static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
807 size_t size, void (*ctor)(void *))
808{
809 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
810}
811
812#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
813
814static inline bool IS_INODE(struct page *page)
815{
816 struct f2fs_node *p = (struct f2fs_node *)page_address(page);
817 return RAW_IS_INODE(p);
818}
819
820static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
821{
822 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
823}
824
825static inline block_t datablock_addr(struct page *node_page,
826 unsigned int offset)
827{
828 struct f2fs_node *raw_node;
829 __le32 *addr_array;
830 raw_node = (struct f2fs_node *)page_address(node_page);
831 addr_array = blkaddr_in_node(raw_node);
832 return le32_to_cpu(addr_array[offset]);
833}
834
835static inline int f2fs_test_bit(unsigned int nr, char *addr)
836{
837 int mask;
838
839 addr += (nr >> 3);
840 mask = 1 << (7 - (nr & 0x07));
841 return mask & *addr;
842}
843
844static inline int f2fs_set_bit(unsigned int nr, char *addr)
845{
846 int mask;
847 int ret;
848
849 addr += (nr >> 3);
850 mask = 1 << (7 - (nr & 0x07));
851 ret = mask & *addr;
852 *addr |= mask;
853 return ret;
854}
855
856static inline int f2fs_clear_bit(unsigned int nr, char *addr)
857{
858 int mask;
859 int ret;
860
861 addr += (nr >> 3);
862 mask = 1 << (7 - (nr & 0x07));
863 ret = mask & *addr;
864 *addr &= ~mask;
865 return ret;
866}
867
868/* used for f2fs_inode_info->flags */
869enum {
870 FI_NEW_INODE, /* indicate newly allocated inode */
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900871 FI_DIRTY_INODE, /* indicate inode is dirty or not */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900872 FI_INC_LINK, /* need to increment i_nlink */
873 FI_ACL_MODE, /* indicate acl mode */
874 FI_NO_ALLOC, /* should not allocate any blocks */
Jaegeuk Kim699489b2013-06-07 22:08:23 +0900875 FI_UPDATE_DIR, /* should update inode block for consistency */
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900876 FI_DELAY_IPUT, /* used for the recovery */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900877};
878
879static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
880{
881 set_bit(flag, &fi->flags);
882}
883
884static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
885{
886 return test_bit(flag, &fi->flags);
887}
888
889static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
890{
891 clear_bit(flag, &fi->flags);
892}
893
894static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
895{
896 fi->i_acl_mode = mode;
897 set_inode_flag(fi, FI_ACL_MODE);
898}
899
900static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
901{
902 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
903 clear_inode_flag(fi, FI_ACL_MODE);
904 return 1;
905 }
906 return 0;
907}
908
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900909static inline int f2fs_readonly(struct super_block *sb)
910{
911 return sb->s_flags & MS_RDONLY;
912}
913
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900914/*
915 * file.c
916 */
917int f2fs_sync_file(struct file *, loff_t, loff_t, int);
918void truncate_data_blocks(struct dnode_of_data *);
919void f2fs_truncate(struct inode *);
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +0900920int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900921int f2fs_setattr(struct dentry *, struct iattr *);
922int truncate_hole(struct inode *, pgoff_t, pgoff_t);
Jaegeuk Kimb292dcab2013-05-22 08:02:02 +0900923int truncate_data_blocks_range(struct dnode_of_data *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900924long f2fs_ioctl(struct file *, unsigned int, unsigned long);
Namjae Jeone9750822013-02-04 23:41:41 +0900925long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900926
927/*
928 * inode.c
929 */
930void f2fs_set_inode_flags(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900931struct inode *f2fs_iget(struct super_block *, unsigned long);
932void update_inode(struct inode *, struct page *);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900933int update_inode_page(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900934int f2fs_write_inode(struct inode *, struct writeback_control *);
935void f2fs_evict_inode(struct inode *);
936
937/*
938 * namei.c
939 */
940struct dentry *f2fs_get_parent(struct dentry *child);
941
942/*
943 * dir.c
944 */
945struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
946 struct page **);
947struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
948ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
949void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
950 struct page *, struct inode *);
Al Virob7f7a5e2013-01-25 16:15:43 -0500951int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900952void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
953int f2fs_make_empty(struct inode *, struct inode *);
954bool f2fs_empty_dir(struct inode *);
955
Al Virob7f7a5e2013-01-25 16:15:43 -0500956static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
957{
958 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
959 inode);
960}
961
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900962/*
963 * super.c
964 */
965int f2fs_sync_fs(struct super_block *, int);
Namjae Jeona07ef782012-12-30 14:52:05 +0900966extern __printf(3, 4)
967void f2fs_msg(struct super_block *, const char *, const char *, ...);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900968
969/*
970 * hash.c
971 */
Leon Romanovsky9836b8b2012-12-27 19:55:46 +0200972f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900973
974/*
975 * node.c
976 */
977struct dnode_of_data;
978struct node_info;
979
980int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
981void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
982int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
983int truncate_inode_blocks(struct inode *, pgoff_t);
984int remove_inode_page(struct inode *);
Jaegeuk Kim44a83ff2013-05-20 10:10:29 +0900985struct page *new_inode_page(struct inode *, const struct qstr *);
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +0900986struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900987void ra_node_page(struct f2fs_sb_info *, nid_t);
988struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
989struct page *get_node_page_ra(struct page *, int);
990void sync_inode_page(struct dnode_of_data *);
991int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
992bool alloc_nid(struct f2fs_sb_info *, nid_t *);
993void alloc_nid_done(struct f2fs_sb_info *, nid_t);
994void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
995void recover_node_page(struct f2fs_sb_info *, struct page *,
996 struct f2fs_summary *, struct node_info *, block_t);
997int recover_inode_page(struct f2fs_sb_info *, struct page *);
998int restore_node_summary(struct f2fs_sb_info *, unsigned int,
999 struct f2fs_summary_block *);
1000void flush_nat_entries(struct f2fs_sb_info *);
1001int build_node_manager(struct f2fs_sb_info *);
1002void destroy_node_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001003int __init create_node_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001004void destroy_node_manager_caches(void);
1005
1006/*
1007 * segment.c
1008 */
1009void f2fs_balance_fs(struct f2fs_sb_info *);
1010void invalidate_blocks(struct f2fs_sb_info *, block_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001011void clear_prefree_segments(struct f2fs_sb_info *);
1012int npages_for_summary_flush(struct f2fs_sb_info *);
1013void allocate_new_segments(struct f2fs_sb_info *);
1014struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
Jaegeuk Kim3cd8a232012-12-10 09:26:05 +09001015struct bio *f2fs_bio_alloc(struct block_device *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001016void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001017void write_meta_page(struct f2fs_sb_info *, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001018void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1019 block_t, block_t *);
1020void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1021 block_t, block_t *);
1022void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1023void recover_data_page(struct f2fs_sb_info *, struct page *,
1024 struct f2fs_summary *, block_t, block_t);
1025void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1026 struct f2fs_summary *, block_t, block_t);
1027void write_data_summaries(struct f2fs_sb_info *, block_t);
1028void write_node_summaries(struct f2fs_sb_info *, block_t);
1029int lookup_journal_in_cursum(struct f2fs_summary_block *,
1030 int, unsigned int, int);
1031void flush_sit_entries(struct f2fs_sb_info *);
1032int build_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001033void destroy_segment_manager(struct f2fs_sb_info *);
1034
1035/*
1036 * checkpoint.c
1037 */
1038struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1039struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1040long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1041int check_orphan_space(struct f2fs_sb_info *);
1042void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1043void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1044int recover_orphan_inodes(struct f2fs_sb_info *);
1045int get_valid_checkpoint(struct f2fs_sb_info *);
1046void set_dirty_dir_page(struct inode *, struct page *);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +09001047void add_dirty_dir_inode(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001048void remove_dirty_dir_inode(struct inode *);
Jaegeuk Kim74d0b912013-05-15 16:40:02 +09001049struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001050void sync_dirty_dir_inodes(struct f2fs_sb_info *);
Jaegeuk Kim43727522013-02-04 15:11:17 +09001051void write_checkpoint(struct f2fs_sb_info *, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001052void init_orphan_info(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001053int __init create_checkpoint_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001054void destroy_checkpoint_caches(void);
1055
1056/*
1057 * data.c
1058 */
1059int reserve_new_block(struct dnode_of_data *);
1060void update_extent_cache(block_t, struct dnode_of_data *);
Jaegeuk Kimc718379b2013-04-24 13:19:56 +09001061struct page *find_data_page(struct inode *, pgoff_t, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001062struct page *get_lock_data_page(struct inode *, pgoff_t);
Jaegeuk Kim64aa7ed2013-05-20 09:55:50 +09001063struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001064int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
1065int do_write_data_page(struct page *);
1066
1067/*
1068 * gc.c
1069 */
1070int start_gc_thread(struct f2fs_sb_info *);
1071void stop_gc_thread(struct f2fs_sb_info *);
1072block_t start_bidx_of_node(unsigned int);
Jaegeuk Kim408e9372013-01-03 17:55:52 +09001073int f2fs_gc(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001074void build_gc_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001075int __init create_gc_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001076void destroy_gc_caches(void);
1077
1078/*
1079 * recovery.c
1080 */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +09001081int recover_fsync_data(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001082bool space_for_roll_forward(struct f2fs_sb_info *);
1083
1084/*
1085 * debug.c
1086 */
1087#ifdef CONFIG_F2FS_STAT_FS
1088struct f2fs_stat_info {
1089 struct list_head stat_list;
1090 struct f2fs_sb_info *sbi;
1091 struct mutex stat_lock;
1092 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1093 int main_area_segs, main_area_sections, main_area_zones;
1094 int hit_ext, total_ext;
1095 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1096 int nats, sits, fnids;
1097 int total_count, utilization;
1098 int bg_gc;
1099 unsigned int valid_count, valid_node_count, valid_inode_count;
1100 unsigned int bimodal, avg_vblocks;
1101 int util_free, util_valid, util_invalid;
1102 int rsvd_segs, overp_segs;
1103 int dirty_count, node_pages, meta_pages;
1104 int prefree_count, call_count;
1105 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1106 int tot_blks, data_blks, node_blks;
1107 int curseg[NR_CURSEG_TYPE];
1108 int cursec[NR_CURSEG_TYPE];
1109 int curzone[NR_CURSEG_TYPE];
1110
1111 unsigned int segment_count[2];
1112 unsigned int block_count[2];
1113 unsigned base_mem, cache_mem;
1114};
1115
1116#define stat_inc_call_count(si) ((si)->call_count++)
1117
1118#define stat_inc_seg_count(sbi, type) \
1119 do { \
1120 struct f2fs_stat_info *si = sbi->stat_info; \
1121 (si)->tot_segs++; \
1122 if (type == SUM_TYPE_DATA) \
1123 si->data_segs++; \
1124 else \
1125 si->node_segs++; \
1126 } while (0)
1127
1128#define stat_inc_tot_blk_count(si, blks) \
1129 (si->tot_blks += (blks))
1130
1131#define stat_inc_data_blk_count(sbi, blks) \
1132 do { \
1133 struct f2fs_stat_info *si = sbi->stat_info; \
1134 stat_inc_tot_blk_count(si, blks); \
1135 si->data_blks += (blks); \
1136 } while (0)
1137
1138#define stat_inc_node_blk_count(sbi, blks) \
1139 do { \
1140 struct f2fs_stat_info *si = sbi->stat_info; \
1141 stat_inc_tot_blk_count(si, blks); \
1142 si->node_blks += (blks); \
1143 } while (0)
1144
1145int f2fs_build_stats(struct f2fs_sb_info *);
1146void f2fs_destroy_stats(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001147void __init f2fs_create_root_stats(void);
Namjae Jeon4589d252013-01-15 19:58:47 +09001148void f2fs_destroy_root_stats(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001149#else
1150#define stat_inc_call_count(si)
1151#define stat_inc_seg_count(si, type)
1152#define stat_inc_tot_blk_count(si, blks)
1153#define stat_inc_data_blk_count(si, blks)
1154#define stat_inc_node_blk_count(sbi, blks)
1155
1156static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1157static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001158static inline void __init f2fs_create_root_stats(void) { }
Namjae Jeon4589d252013-01-15 19:58:47 +09001159static inline void f2fs_destroy_root_stats(void) { }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001160#endif
1161
1162extern const struct file_operations f2fs_dir_operations;
1163extern const struct file_operations f2fs_file_operations;
1164extern const struct inode_operations f2fs_file_inode_operations;
1165extern const struct address_space_operations f2fs_dblock_aops;
1166extern const struct address_space_operations f2fs_node_aops;
1167extern const struct address_space_operations f2fs_meta_aops;
1168extern const struct inode_operations f2fs_dir_inode_operations;
1169extern const struct inode_operations f2fs_symlink_inode_operations;
1170extern const struct inode_operations f2fs_special_inode_operations;
1171#endif