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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>
Jaegeuk Kimc2d715d2013-08-08 15:56:49 +090020#include <linux/kobject.h>
Gu Zheng7bd59382013-10-22 14:52:26 +080021#include <linux/sched.h>
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090022
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090023#ifdef CONFIG_F2FS_CHECK_FS
24#define f2fs_bug_on(condition) BUG_ON(condition)
Jaegeuk Kim0daaad92013-11-24 13:50:35 +090025#define f2fs_down_write(x, y) down_write_nest_lock(x, y)
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090026#else
27#define f2fs_bug_on(condition)
Jaegeuk Kim0daaad92013-11-24 13:50:35 +090028#define f2fs_down_write(x, y) down_write(x)
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090029#endif
30
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090031/*
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
Jaegeuk Kim444c5802013-08-08 15:16:22 +090041#define F2FS_MOUNT_INLINE_XATTR 0x00000080
Huajun Li1001b342013-11-10 23:13:16 +080042#define F2FS_MOUNT_INLINE_DATA 0x00000100
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090043
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
Jaegeuk Kima9841c42013-05-24 12:41:04 +090052typedef u32 block_t; /*
53 * should not change u32, since it is the on-disk block
54 * address format, __le32.
55 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090056typedef u32 nid_t;
57
58struct f2fs_mount_info {
59 unsigned int opt;
60};
61
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090062#define CRCPOLY_LE 0xedb88320
63
64static inline __u32 f2fs_crc32(void *buf, size_t len)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090065{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090066 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;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090076}
77
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090078static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090079{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090080 return f2fs_crc32(buf, buf_size) == blk_crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090081}
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
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900103/* 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
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900110/* 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
139/*
Namjae Jeone9750822013-02-04 23:41:41 +0900140 * 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
153/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900154 * For INODE and NODE manager
155 */
Jaegeuk Kimdbe6a5f2013-08-09 08:14:06 +0900156/*
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)
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900163enum {
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
Chao Yu4f4124d2013-12-21 18:02:14 +0800168 * by get_data_block.
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900169 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900170};
171
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900172#define F2FS_LINK_MAX 32000 /* maximum link count per file */
173
174/* for in-memory extent cache entry */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900175#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
176
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900177struct 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 */
Masanari Iida111d2492013-03-19 08:03:35 +0900181 unsigned int len; /* length of the extent */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900182};
183
184/*
185 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
186 */
187#define FADVISE_COLD_BIT 0x01
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900188#define FADVISE_LOST_PINO_BIT 0x02
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900189
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 */
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900195 unsigned int i_pino; /* parent inode number */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900196 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 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900200 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 */
Jaegeuk Kime518ff82013-08-09 14:46:15 +0900204 unsigned long long xattr_ver; /* cp version of xattr modification */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900205 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 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900231 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{
Jaegeuk Kimd66d1f72013-01-03 08:57:21 +0900269 memset(dn, 0, sizeof(*dn));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900270 dn->inode = inode;
271 dn->inode_page = ipage;
272 dn->node_page = npage;
273 dn->nid = nid;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900274}
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 */
Jaegeuk Kim81eb8d62013-10-24 13:31:34 +0900320
321 /* a threshold to reclaim prefree segments */
322 unsigned int rec_prefree_segments;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900323
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 */
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900328
329 unsigned int ipu_policy; /* in-place-update policy */
330 unsigned int min_ipu_util; /* in-place-update threshold */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900331};
332
333/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900334 * 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
350/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900351 * 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 */
Jaegeuk Kim7d5e5102013-11-18 17:13:35 +0900361#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900362enum page_type {
363 DATA,
364 NODE,
365 META,
366 NR_PAGE_TYPE,
367 META_FLUSH,
368};
369
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900370struct f2fs_io_info {
Gu Zheng7e8f2302013-12-20 18:17:49 +0800371 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
372 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900373};
374
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +0900375#define is_read_io(rw) (((rw) & 1) == READ)
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900376struct f2fs_bio_info {
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900377 struct f2fs_sb_info *sbi; /* f2fs superblock */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900378 struct bio *bio; /* bios to merge */
379 sector_t last_block_in_bio; /* last block number */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900380 struct f2fs_io_info fio; /* store buffered io info. */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900381 struct mutex io_mutex; /* mutex for bio */
382};
383
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900384struct f2fs_sb_info {
385 struct super_block *sb; /* pointer to VFS super block */
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900386 struct proc_dir_entry *s_proc; /* proc entry */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900387 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
388 struct f2fs_super_block *raw_super; /* raw super block pointer */
389 int s_dirty; /* dirty flag for checkpoint */
390
391 /* for node-related operations */
392 struct f2fs_nm_info *nm_info; /* node manager */
393 struct inode *node_inode; /* cache node blocks */
394
395 /* for segment-related operations */
396 struct f2fs_sm_info *sm_info; /* segment manager */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900397
398 /* for bio operations */
Chao Yu924b7202013-11-20 14:46:39 +0800399 struct f2fs_bio_info read_io; /* for read bios */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900400 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900401
402 /* for checkpoint */
403 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
404 struct inode *meta_inode; /* cache meta blocks */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900405 struct mutex cp_mutex; /* checkpoint procedure lock */
Gu Zhenge4795562013-09-27 18:08:30 +0800406 struct rw_semaphore cp_rwsem; /* blocking FS operations */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900407 struct mutex node_write; /* locking node writes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900408 struct mutex writepages; /* mutex for writepages() */
Haicheng Liaabe5132013-10-23 12:39:32 +0800409 bool por_doing; /* recovery is doing or not */
410 bool on_build_free_nids; /* build_free_nids is doing */
Changman Leefb51b5e2013-11-07 12:48:25 +0900411 wait_queue_head_t cp_wait;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900412
413 /* for orphan inode management */
414 struct list_head orphan_inode_list; /* orphan inode list */
Gu Zheng17b692f2014-01-10 18:09:14 +0800415 spinlock_t orphan_inode_lock; /* for orphan inode list */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900416 unsigned int n_orphans; /* # of orphan inodes */
Gu Zheng0d47c1a2013-12-26 18:24:19 +0800417 unsigned int max_orphans; /* max orphan inodes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900418
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 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900422
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 */
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900452 unsigned int cur_victim_sec; /* current victim section num */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900453
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900454 /* maximum # of trials to find a victim segment for SSR and GC */
455 unsigned int max_victim_search;
456
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900457 /*
458 * for stat information.
459 * one is for the LFS mode, and the other is for the SSR mode.
460 */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900461#ifdef CONFIG_F2FS_STAT_FS
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900462 struct f2fs_stat_info *stat_info; /* FS status information */
463 unsigned int segment_count[2]; /* # of allocated segments */
464 unsigned int block_count[2]; /* # of allocated blocks */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900465 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +0900466 int inline_inode; /* # of inline_data inodes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900467 int bg_gc; /* background gc calls */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900468 unsigned int n_dirty_dirs; /* # of dir inodes */
469#endif
470 unsigned int last_victim[2]; /* last victim segment # */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900471 spinlock_t stat_lock; /* lock for stat operations */
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900472
473 /* For sysfs suppport */
474 struct kobject s_kobj;
475 struct completion s_kobj_unregister;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900476};
477
478/*
479 * Inline functions
480 */
481static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
482{
483 return container_of(inode, struct f2fs_inode_info, vfs_inode);
484}
485
486static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
487{
488 return sb->s_fs_info;
489}
490
491static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
492{
493 return (struct f2fs_super_block *)(sbi->raw_super);
494}
495
496static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
497{
498 return (struct f2fs_checkpoint *)(sbi->ckpt);
499}
500
Gu Zheng45590712013-07-15 17:57:38 +0800501static inline struct f2fs_node *F2FS_NODE(struct page *page)
502{
503 return (struct f2fs_node *)page_address(page);
504}
505
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900506static inline struct f2fs_inode *F2FS_INODE(struct page *page)
507{
508 return &((struct f2fs_node *)page_address(page))->i;
509}
510
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900511static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
512{
513 return (struct f2fs_nm_info *)(sbi->nm_info);
514}
515
516static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
517{
518 return (struct f2fs_sm_info *)(sbi->sm_info);
519}
520
521static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
522{
523 return (struct sit_info *)(SM_I(sbi)->sit_info);
524}
525
526static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
527{
528 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
529}
530
531static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
532{
533 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
534}
535
536static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
537{
538 sbi->s_dirty = 1;
539}
540
541static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
542{
543 sbi->s_dirty = 0;
544}
545
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900546static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
547{
548 return le64_to_cpu(cp->checkpoint_ver);
549}
550
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900551static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
552{
553 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
554 return ckpt_flags & f;
555}
556
557static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
558{
559 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
560 ckpt_flags |= f;
561 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
562}
563
564static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
565{
566 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
567 ckpt_flags &= (~f);
568 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
569}
570
Gu Zhenge4795562013-09-27 18:08:30 +0800571static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900572{
Gu Zhenge4795562013-09-27 18:08:30 +0800573 down_read(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900574}
575
Gu Zhenge4795562013-09-27 18:08:30 +0800576static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900577{
Gu Zhenge4795562013-09-27 18:08:30 +0800578 up_read(&sbi->cp_rwsem);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900579}
580
Gu Zhenge4795562013-09-27 18:08:30 +0800581static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900582{
Jaegeuk Kim0daaad92013-11-24 13:50:35 +0900583 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900584}
585
Gu Zhenge4795562013-09-27 18:08:30 +0800586static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900587{
Gu Zhenge4795562013-09-27 18:08:30 +0800588 up_write(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900589}
590
591/*
592 * Check whether the given nid is within node id range.
593 */
Namjae Jeon064e0822013-03-17 17:27:20 +0900594static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900595{
Namjae Jeon064e0822013-03-17 17:27:20 +0900596 WARN_ON((nid >= NM_I(sbi)->max_nid));
Chao Yucfb271d2013-12-05 17:15:22 +0800597 if (unlikely(nid >= NM_I(sbi)->max_nid))
Namjae Jeon064e0822013-03-17 17:27:20 +0900598 return -EINVAL;
599 return 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900600}
601
602#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
603
604/*
605 * Check whether the inode has blocks or not
606 */
607static inline int F2FS_HAS_BLOCKS(struct inode *inode)
608{
609 if (F2FS_I(inode)->i_xattr_nid)
Chris Fries6c311ec2014-01-17 14:44:39 -0600610 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900611 else
Chris Fries6c311ec2014-01-17 14:44:39 -0600612 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900613}
614
615static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
616 struct inode *inode, blkcnt_t count)
617{
618 block_t valid_block_count;
619
620 spin_lock(&sbi->stat_lock);
621 valid_block_count =
622 sbi->total_valid_block_count + (block_t)count;
Chao Yucfb271d2013-12-05 17:15:22 +0800623 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900624 spin_unlock(&sbi->stat_lock);
625 return false;
626 }
627 inode->i_blocks += count;
628 sbi->total_valid_block_count = valid_block_count;
629 sbi->alloc_valid_block_count += (block_t)count;
630 spin_unlock(&sbi->stat_lock);
631 return true;
632}
633
Gu Zhengda19b0d2013-11-19 18:03:27 +0800634static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900635 struct inode *inode,
636 blkcnt_t count)
637{
638 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900639 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
640 f2fs_bug_on(inode->i_blocks < count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900641 inode->i_blocks -= count;
642 sbi->total_valid_block_count -= (block_t)count;
643 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900644}
645
646static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
647{
648 atomic_inc(&sbi->nr_pages[count_type]);
649 F2FS_SET_SB_DIRT(sbi);
650}
651
652static inline void inode_inc_dirty_dents(struct inode *inode)
653{
654 atomic_inc(&F2FS_I(inode)->dirty_dents);
655}
656
657static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
658{
659 atomic_dec(&sbi->nr_pages[count_type]);
660}
661
662static inline void inode_dec_dirty_dents(struct inode *inode)
663{
664 atomic_dec(&F2FS_I(inode)->dirty_dents);
665}
666
667static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
668{
669 return atomic_read(&sbi->nr_pages[count_type]);
670}
671
Namjae Jeon5ac206c2013-02-02 23:52:59 +0900672static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
673{
674 unsigned int pages_per_sec = sbi->segs_per_sec *
675 (1 << sbi->log_blocks_per_seg);
676 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
677 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
678}
679
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900680static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
681{
682 block_t ret;
683 spin_lock(&sbi->stat_lock);
684 ret = sbi->total_valid_block_count;
685 spin_unlock(&sbi->stat_lock);
686 return ret;
687}
688
689static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
690{
691 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
692
693 /* return NAT or SIT bitmap */
694 if (flag == NAT_BITMAP)
695 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
696 else if (flag == SIT_BITMAP)
697 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
698
699 return 0;
700}
701
702static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
703{
704 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900705 int offset = (flag == NAT_BITMAP) ?
706 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900707 return &ckpt->sit_nat_version_bitmap + offset;
708}
709
710static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
711{
712 block_t start_addr;
713 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900714 unsigned long long ckpt_version = cur_cp_version(ckpt);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900715
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900716 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900717
718 /*
719 * odd numbered checkpoint should at cp segment 0
720 * and even segent must be at cp segment 1
721 */
722 if (!(ckpt_version & 1))
723 start_addr += sbi->blocks_per_seg;
724
725 return start_addr;
726}
727
728static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
729{
730 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
731}
732
733static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800734 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900735{
736 block_t valid_block_count;
737 unsigned int valid_node_count;
738
739 spin_lock(&sbi->stat_lock);
740
Gu Zhengef86d702013-11-19 18:03:38 +0800741 valid_block_count = sbi->total_valid_block_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800742 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900743 spin_unlock(&sbi->stat_lock);
744 return false;
745 }
746
Gu Zhengef86d702013-11-19 18:03:38 +0800747 valid_node_count = sbi->total_valid_node_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800748 if (unlikely(valid_node_count > sbi->total_node_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900749 spin_unlock(&sbi->stat_lock);
750 return false;
751 }
752
753 if (inode)
Gu Zhengef86d702013-11-19 18:03:38 +0800754 inode->i_blocks++;
755
756 sbi->alloc_valid_block_count++;
757 sbi->total_valid_node_count++;
758 sbi->total_valid_block_count++;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900759 spin_unlock(&sbi->stat_lock);
760
761 return true;
762}
763
764static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800765 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900766{
767 spin_lock(&sbi->stat_lock);
768
Gu Zhengef86d702013-11-19 18:03:38 +0800769 f2fs_bug_on(!sbi->total_valid_block_count);
770 f2fs_bug_on(!sbi->total_valid_node_count);
771 f2fs_bug_on(!inode->i_blocks);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900772
Gu Zhengef86d702013-11-19 18:03:38 +0800773 inode->i_blocks--;
774 sbi->total_valid_node_count--;
775 sbi->total_valid_block_count--;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900776
777 spin_unlock(&sbi->stat_lock);
778}
779
780static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
781{
782 unsigned int ret;
783 spin_lock(&sbi->stat_lock);
784 ret = sbi->total_valid_node_count;
785 spin_unlock(&sbi->stat_lock);
786 return ret;
787}
788
789static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
790{
791 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900792 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900793 sbi->total_valid_inode_count++;
794 spin_unlock(&sbi->stat_lock);
795}
796
Jaegeuk Kim0e802202013-11-26 16:36:20 +0900797static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900798{
799 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900800 f2fs_bug_on(!sbi->total_valid_inode_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900801 sbi->total_valid_inode_count--;
802 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900803}
804
805static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
806{
807 unsigned int ret;
808 spin_lock(&sbi->stat_lock);
809 ret = sbi->total_valid_inode_count;
810 spin_unlock(&sbi->stat_lock);
811 return ret;
812}
813
814static inline void f2fs_put_page(struct page *page, int unlock)
815{
Jaegeuk Kim031fa8c2013-11-28 12:55:13 +0900816 if (!page)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900817 return;
818
819 if (unlock) {
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900820 f2fs_bug_on(!PageLocked(page));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900821 unlock_page(page);
822 }
823 page_cache_release(page);
824}
825
826static inline void f2fs_put_dnode(struct dnode_of_data *dn)
827{
828 if (dn->node_page)
829 f2fs_put_page(dn->node_page, 1);
830 if (dn->inode_page && dn->node_page != dn->inode_page)
831 f2fs_put_page(dn->inode_page, 0);
832 dn->node_page = NULL;
833 dn->inode_page = NULL;
834}
835
836static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
837 size_t size, void (*ctor)(void *))
838{
839 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
840}
841
Gu Zheng7bd59382013-10-22 14:52:26 +0800842static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
843 gfp_t flags)
844{
845 void *entry;
846retry:
847 entry = kmem_cache_alloc(cachep, flags);
848 if (!entry) {
849 cond_resched();
850 goto retry;
851 }
852
853 return entry;
854}
855
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900856#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
857
858static inline bool IS_INODE(struct page *page)
859{
Gu Zheng45590712013-07-15 17:57:38 +0800860 struct f2fs_node *p = F2FS_NODE(page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900861 return RAW_IS_INODE(p);
862}
863
864static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
865{
866 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
867}
868
869static inline block_t datablock_addr(struct page *node_page,
870 unsigned int offset)
871{
872 struct f2fs_node *raw_node;
873 __le32 *addr_array;
Gu Zheng45590712013-07-15 17:57:38 +0800874 raw_node = F2FS_NODE(node_page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900875 addr_array = blkaddr_in_node(raw_node);
876 return le32_to_cpu(addr_array[offset]);
877}
878
879static inline int f2fs_test_bit(unsigned int nr, char *addr)
880{
881 int mask;
882
883 addr += (nr >> 3);
884 mask = 1 << (7 - (nr & 0x07));
885 return mask & *addr;
886}
887
888static inline int f2fs_set_bit(unsigned int nr, char *addr)
889{
890 int mask;
891 int ret;
892
893 addr += (nr >> 3);
894 mask = 1 << (7 - (nr & 0x07));
895 ret = mask & *addr;
896 *addr |= mask;
897 return ret;
898}
899
900static inline int f2fs_clear_bit(unsigned int nr, char *addr)
901{
902 int mask;
903 int ret;
904
905 addr += (nr >> 3);
906 mask = 1 << (7 - (nr & 0x07));
907 ret = mask & *addr;
908 *addr &= ~mask;
909 return ret;
910}
911
912/* used for f2fs_inode_info->flags */
913enum {
914 FI_NEW_INODE, /* indicate newly allocated inode */
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900915 FI_DIRTY_INODE, /* indicate inode is dirty or not */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900916 FI_INC_LINK, /* need to increment i_nlink */
917 FI_ACL_MODE, /* indicate acl mode */
918 FI_NO_ALLOC, /* should not allocate any blocks */
Jaegeuk Kim699489b2013-06-07 22:08:23 +0900919 FI_UPDATE_DIR, /* should update inode block for consistency */
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900920 FI_DELAY_IPUT, /* used for the recovery */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900921 FI_NO_EXTENT, /* not to use the extent cache */
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900922 FI_INLINE_XATTR, /* used for inline xattr */
Huajun Li1001b342013-11-10 23:13:16 +0800923 FI_INLINE_DATA, /* used for inline data*/
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900924};
925
926static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
927{
928 set_bit(flag, &fi->flags);
929}
930
931static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
932{
933 return test_bit(flag, &fi->flags);
934}
935
936static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
937{
938 clear_bit(flag, &fi->flags);
939}
940
941static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
942{
943 fi->i_acl_mode = mode;
944 set_inode_flag(fi, FI_ACL_MODE);
945}
946
947static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
948{
949 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
950 clear_inode_flag(fi, FI_ACL_MODE);
951 return 1;
952 }
953 return 0;
954}
955
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900956static inline void get_inline_info(struct f2fs_inode_info *fi,
957 struct f2fs_inode *ri)
958{
959 if (ri->i_inline & F2FS_INLINE_XATTR)
960 set_inode_flag(fi, FI_INLINE_XATTR);
Huajun Li1001b342013-11-10 23:13:16 +0800961 if (ri->i_inline & F2FS_INLINE_DATA)
962 set_inode_flag(fi, FI_INLINE_DATA);
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900963}
964
965static inline void set_raw_inline(struct f2fs_inode_info *fi,
966 struct f2fs_inode *ri)
967{
968 ri->i_inline = 0;
969
970 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
971 ri->i_inline |= F2FS_INLINE_XATTR;
Huajun Li1001b342013-11-10 23:13:16 +0800972 if (is_inode_flag_set(fi, FI_INLINE_DATA))
973 ri->i_inline |= F2FS_INLINE_DATA;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900974}
975
Jaegeuk Kimde936532013-08-12 21:08:03 +0900976static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
977{
978 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
979 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
980 return DEF_ADDRS_PER_INODE;
981}
982
Jaegeuk Kim65985d92013-08-14 21:57:27 +0900983static inline void *inline_xattr_addr(struct page *page)
984{
985 struct f2fs_inode *ri;
986 ri = (struct f2fs_inode *)page_address(page);
987 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
988 F2FS_INLINE_XATTR_ADDRS]);
989}
990
991static inline int inline_xattr_size(struct inode *inode)
992{
993 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
994 return F2FS_INLINE_XATTR_ADDRS << 2;
995 else
996 return 0;
997}
998
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +0900999static inline int f2fs_has_inline_data(struct inode *inode)
1000{
1001 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1002}
1003
Huajun Li1001b342013-11-10 23:13:16 +08001004static inline void *inline_data_addr(struct page *page)
1005{
1006 struct f2fs_inode *ri;
1007 ri = (struct f2fs_inode *)page_address(page);
1008 return (void *)&(ri->i_addr[1]);
1009}
1010
Jaegeuk Kim77888c12013-05-20 20:28:47 +09001011static inline int f2fs_readonly(struct super_block *sb)
1012{
1013 return sb->s_flags & MS_RDONLY;
1014}
1015
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001016/*
1017 * file.c
1018 */
1019int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1020void truncate_data_blocks(struct dnode_of_data *);
Jaegeuk Kim1e1bb4b2013-12-26 12:49:48 +09001021int truncate_blocks(struct inode *, u64);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001022void f2fs_truncate(struct inode *);
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001023int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001024int f2fs_setattr(struct dentry *, struct iattr *);
1025int truncate_hole(struct inode *, pgoff_t, pgoff_t);
Jaegeuk Kimb292dcab2013-05-22 08:02:02 +09001026int truncate_data_blocks_range(struct dnode_of_data *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001027long f2fs_ioctl(struct file *, unsigned int, unsigned long);
Namjae Jeone9750822013-02-04 23:41:41 +09001028long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001029
1030/*
1031 * inode.c
1032 */
1033void f2fs_set_inode_flags(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001034struct inode *f2fs_iget(struct super_block *, unsigned long);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001035int try_to_free_nats(struct f2fs_sb_info *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001036void update_inode(struct inode *, struct page *);
Jaegeuk Kim39936832012-11-22 16:21:29 +09001037int update_inode_page(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001038int f2fs_write_inode(struct inode *, struct writeback_control *);
1039void f2fs_evict_inode(struct inode *);
1040
1041/*
1042 * namei.c
1043 */
1044struct dentry *f2fs_get_parent(struct dentry *child);
1045
1046/*
1047 * dir.c
1048 */
1049struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1050 struct page **);
1051struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1052ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1053void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1054 struct page *, struct inode *);
Jaegeuk Kim1cd14ca2013-07-18 18:02:31 +09001055int update_dent_inode(struct inode *, const struct qstr *);
Al Virob7f7a5e2013-01-25 16:15:43 -05001056int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001057void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1058int f2fs_make_empty(struct inode *, struct inode *);
1059bool f2fs_empty_dir(struct inode *);
1060
Al Virob7f7a5e2013-01-25 16:15:43 -05001061static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1062{
1063 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1064 inode);
1065}
1066
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001067/*
1068 * super.c
1069 */
1070int f2fs_sync_fs(struct super_block *, int);
Namjae Jeona07ef782012-12-30 14:52:05 +09001071extern __printf(3, 4)
1072void f2fs_msg(struct super_block *, const char *, const char *, ...);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001073
1074/*
1075 * hash.c
1076 */
Leon Romanovsky9836b8b2012-12-27 19:55:46 +02001077f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001078
1079/*
1080 * node.c
1081 */
1082struct dnode_of_data;
1083struct node_info;
1084
1085int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1086void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1087int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1088int truncate_inode_blocks(struct inode *, pgoff_t);
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +09001089int truncate_xattr_node(struct inode *, struct page *);
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001090int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
Gu Zheng58e674d2013-11-19 18:03:18 +08001091void remove_inode_page(struct inode *);
Jaegeuk Kim44a83ff2013-05-20 10:10:29 +09001092struct page *new_inode_page(struct inode *, const struct qstr *);
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +09001093struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001094void ra_node_page(struct f2fs_sb_info *, nid_t);
1095struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1096struct page *get_node_page_ra(struct page *, int);
1097void sync_inode_page(struct dnode_of_data *);
1098int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1099bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1100void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1101void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1102void recover_node_page(struct f2fs_sb_info *, struct page *,
1103 struct f2fs_summary *, struct node_info *, block_t);
1104int recover_inode_page(struct f2fs_sb_info *, struct page *);
1105int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1106 struct f2fs_summary_block *);
1107void flush_nat_entries(struct f2fs_sb_info *);
1108int build_node_manager(struct f2fs_sb_info *);
1109void destroy_node_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001110int __init create_node_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001111void destroy_node_manager_caches(void);
1112
1113/*
1114 * segment.c
1115 */
1116void f2fs_balance_fs(struct f2fs_sb_info *);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001117void f2fs_balance_fs_bg(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001118void invalidate_blocks(struct f2fs_sb_info *, block_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001119void clear_prefree_segments(struct f2fs_sb_info *);
1120int npages_for_summary_flush(struct f2fs_sb_info *);
1121void allocate_new_segments(struct f2fs_sb_info *);
1122struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001123void write_meta_page(struct f2fs_sb_info *, struct page *);
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001124void write_node_page(struct f2fs_sb_info *, struct page *,
1125 struct f2fs_io_info *, unsigned int, block_t, block_t *);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001126void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1127 struct f2fs_io_info *);
1128void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001129void recover_data_page(struct f2fs_sb_info *, struct page *,
1130 struct f2fs_summary *, block_t, block_t);
1131void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1132 struct f2fs_summary *, block_t, block_t);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001133void allocate_data_block(struct f2fs_sb_info *, struct page *,
1134 block_t, block_t *, struct f2fs_summary *, int);
Yuan Zhong5514f0a2014-01-10 07:26:14 +00001135void f2fs_wait_on_page_writeback(struct page *, enum page_type);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001136void write_data_summaries(struct f2fs_sb_info *, block_t);
1137void write_node_summaries(struct f2fs_sb_info *, block_t);
1138int lookup_journal_in_cursum(struct f2fs_summary_block *,
1139 int, unsigned int, int);
1140void flush_sit_entries(struct f2fs_sb_info *);
1141int build_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001142void destroy_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001143int __init create_segment_manager_caches(void);
1144void destroy_segment_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001145
1146/*
1147 * checkpoint.c
1148 */
1149struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1150struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1151long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001152int acquire_orphan_inode(struct f2fs_sb_info *);
1153void release_orphan_inode(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001154void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1155void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
Chao Yu8f99a942013-11-28 15:43:43 +08001156void recover_orphan_inodes(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001157int get_valid_checkpoint(struct f2fs_sb_info *);
1158void set_dirty_dir_page(struct inode *, struct page *);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +09001159void add_dirty_dir_inode(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001160void remove_dirty_dir_inode(struct inode *);
Jaegeuk Kim74d0b912013-05-15 16:40:02 +09001161struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001162void sync_dirty_dir_inodes(struct f2fs_sb_info *);
Jaegeuk Kim43727522013-02-04 15:11:17 +09001163void write_checkpoint(struct f2fs_sb_info *, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001164void init_orphan_info(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001165int __init create_checkpoint_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001166void destroy_checkpoint_caches(void);
1167
1168/*
1169 * data.c
1170 */
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001171void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001172int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1173void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001174 struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001175int reserve_new_block(struct dnode_of_data *);
Huajun Lib6009652013-11-10 23:13:18 +08001176int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001177void update_extent_cache(block_t, struct dnode_of_data *);
Jaegeuk Kimc718379b2013-04-24 13:19:56 +09001178struct page *find_data_page(struct inode *, pgoff_t, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001179struct page *get_lock_data_page(struct inode *, pgoff_t);
Jaegeuk Kim64aa7ed2013-05-20 09:55:50 +09001180struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001181int do_write_data_page(struct page *, struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001182
1183/*
1184 * gc.c
1185 */
1186int start_gc_thread(struct f2fs_sb_info *);
1187void stop_gc_thread(struct f2fs_sb_info *);
Jaegeuk Kimde936532013-08-12 21:08:03 +09001188block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
Jaegeuk Kim408e9372013-01-03 17:55:52 +09001189int f2fs_gc(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001190void build_gc_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001191int __init create_gc_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001192void destroy_gc_caches(void);
1193
1194/*
1195 * recovery.c
1196 */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +09001197int recover_fsync_data(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001198bool space_for_roll_forward(struct f2fs_sb_info *);
1199
1200/*
1201 * debug.c
1202 */
1203#ifdef CONFIG_F2FS_STAT_FS
1204struct f2fs_stat_info {
1205 struct list_head stat_list;
1206 struct f2fs_sb_info *sbi;
1207 struct mutex stat_lock;
1208 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1209 int main_area_segs, main_area_sections, main_area_zones;
1210 int hit_ext, total_ext;
1211 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1212 int nats, sits, fnids;
1213 int total_count, utilization;
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001214 int bg_gc, inline_inode;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001215 unsigned int valid_count, valid_node_count, valid_inode_count;
1216 unsigned int bimodal, avg_vblocks;
1217 int util_free, util_valid, util_invalid;
1218 int rsvd_segs, overp_segs;
1219 int dirty_count, node_pages, meta_pages;
1220 int prefree_count, call_count;
1221 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1222 int tot_blks, data_blks, node_blks;
1223 int curseg[NR_CURSEG_TYPE];
1224 int cursec[NR_CURSEG_TYPE];
1225 int curzone[NR_CURSEG_TYPE];
1226
1227 unsigned int segment_count[2];
1228 unsigned int block_count[2];
1229 unsigned base_mem, cache_mem;
1230};
1231
Gu Zheng963d4f72013-07-12 14:47:11 +08001232static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1233{
Chris Fries6c311ec2014-01-17 14:44:39 -06001234 return (struct f2fs_stat_info *)sbi->stat_info;
Gu Zheng963d4f72013-07-12 14:47:11 +08001235}
1236
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001237#define stat_inc_call_count(si) ((si)->call_count++)
1238#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1239#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1240#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1241#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1242#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001243#define stat_inc_inline_inode(inode) \
1244 do { \
1245 if (f2fs_has_inline_data(inode)) \
1246 ((F2FS_SB(inode->i_sb))->inline_inode++); \
1247 } while (0)
1248#define stat_dec_inline_inode(inode) \
1249 do { \
1250 if (f2fs_has_inline_data(inode)) \
1251 ((F2FS_SB(inode->i_sb))->inline_inode--); \
1252 } while (0)
1253
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001254#define stat_inc_seg_type(sbi, curseg) \
1255 ((sbi)->segment_count[(curseg)->alloc_type]++)
1256#define stat_inc_block_count(sbi, curseg) \
1257 ((sbi)->block_count[(curseg)->alloc_type]++)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001258
1259#define stat_inc_seg_count(sbi, type) \
1260 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001261 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001262 (si)->tot_segs++; \
1263 if (type == SUM_TYPE_DATA) \
1264 si->data_segs++; \
1265 else \
1266 si->node_segs++; \
1267 } while (0)
1268
1269#define stat_inc_tot_blk_count(si, blks) \
1270 (si->tot_blks += (blks))
1271
1272#define stat_inc_data_blk_count(sbi, blks) \
1273 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001274 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001275 stat_inc_tot_blk_count(si, blks); \
1276 si->data_blks += (blks); \
1277 } while (0)
1278
1279#define stat_inc_node_blk_count(sbi, blks) \
1280 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001281 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001282 stat_inc_tot_blk_count(si, blks); \
1283 si->node_blks += (blks); \
1284 } while (0)
1285
1286int f2fs_build_stats(struct f2fs_sb_info *);
1287void f2fs_destroy_stats(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001288void __init f2fs_create_root_stats(void);
Namjae Jeon4589d252013-01-15 19:58:47 +09001289void f2fs_destroy_root_stats(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001290#else
1291#define stat_inc_call_count(si)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001292#define stat_inc_bggc_count(si)
1293#define stat_inc_dirty_dir(sbi)
1294#define stat_dec_dirty_dir(sbi)
1295#define stat_inc_total_hit(sb)
1296#define stat_inc_read_hit(sb)
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001297#define stat_inc_inline_inode(inode)
1298#define stat_dec_inline_inode(inode)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001299#define stat_inc_seg_type(sbi, curseg)
1300#define stat_inc_block_count(sbi, curseg)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001301#define stat_inc_seg_count(si, type)
1302#define stat_inc_tot_blk_count(si, blks)
1303#define stat_inc_data_blk_count(si, blks)
1304#define stat_inc_node_blk_count(sbi, blks)
1305
1306static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1307static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001308static inline void __init f2fs_create_root_stats(void) { }
Namjae Jeon4589d252013-01-15 19:58:47 +09001309static inline void f2fs_destroy_root_stats(void) { }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001310#endif
1311
1312extern const struct file_operations f2fs_dir_operations;
1313extern const struct file_operations f2fs_file_operations;
1314extern const struct inode_operations f2fs_file_inode_operations;
1315extern const struct address_space_operations f2fs_dblock_aops;
1316extern const struct address_space_operations f2fs_node_aops;
1317extern const struct address_space_operations f2fs_meta_aops;
1318extern const struct inode_operations f2fs_dir_inode_operations;
1319extern const struct inode_operations f2fs_symlink_inode_operations;
1320extern const struct inode_operations f2fs_special_inode_operations;
Huajun Li1001b342013-11-10 23:13:16 +08001321
Huajun Lie18c65b2013-11-10 23:13:19 +08001322/*
1323 * inline.c
1324 */
Huajun Lie18c65b2013-11-10 23:13:19 +08001325bool f2fs_may_inline(struct inode *);
1326int f2fs_read_inline_data(struct inode *, struct page *);
Jaegeuk Kim9e09fc82013-12-27 12:28:59 +09001327int f2fs_convert_inline_data(struct inode *, pgoff_t);
Huajun Lie18c65b2013-11-10 23:13:19 +08001328int f2fs_write_inline_data(struct inode *, struct page *, unsigned int);
Jaegeuk Kim1e1bb4b2013-12-26 12:49:48 +09001329int recover_inline_data(struct inode *, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001330#endif