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f2fs: fix the use of XATTR_NODE_OFFSET
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / fs / f2fs / f2fs.h
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0a8165d7 1/*
39a53e0c
JK		 2 * fs/f2fs/f2fs.h
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef _LINUX_F2FS_H
12#define _LINUX_F2FS_H
13
14#include <linux/types.h>
15#include <linux/page-flags.h>
16#include <linux/buffer_head.h>
39a53e0c
JK		 17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
c2d715d1 20#include <linux/kobject.h>
39a53e0c
JK		 21
22/*
23 * For mount options
24 */
25#define F2FS_MOUNT_BG_GC 0x00000001
26#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
27#define F2FS_MOUNT_DISCARD 0x00000004
28#define F2FS_MOUNT_NOHEAP 0x00000008
29#define F2FS_MOUNT_XATTR_USER 0x00000010
30#define F2FS_MOUNT_POSIX_ACL 0x00000020
31#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
32
33#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
34#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
35#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
36
37#define ver_after(a, b) (typecheck(unsigned long long, a) && \
38 typecheck(unsigned long long, b) && \
39 ((long long)((a) - (b)) > 0))
40
a9841c4d
JK		 41typedef u32 block_t; /*
42 * should not change u32, since it is the on-disk block
43 * address format, __le32.
44 */
39a53e0c
JK		 45typedef u32 nid_t;
46
47struct f2fs_mount_info {
48 unsigned int opt;
49};
50
7e586fa0
JK		 51#define CRCPOLY_LE 0xedb88320
52
53static inline __u32 f2fs_crc32(void *buf, size_t len)
39a53e0c 54{
7e586fa0
JK		 55 unsigned char *p = (unsigned char *)buf;
56 __u32 crc = F2FS_SUPER_MAGIC;
57 int i;
58
59 while (len--) {
60 crc ^= *p++;
61 for (i = 0; i < 8; i++)
62 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
63 }
64 return crc;
39a53e0c
JK		 65}
66
7e586fa0 67static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
39a53e0c 68{
7e586fa0 69 return f2fs_crc32(buf, buf_size) == blk_crc;
39a53e0c
JK		 70}
71
72/*
73 * For checkpoint manager
74 */
75enum {
76 NAT_BITMAP,
77 SIT_BITMAP
78};
79
80/* for the list of orphan inodes */
81struct orphan_inode_entry {
82 struct list_head list; /* list head */
83 nid_t ino; /* inode number */
84};
85
86/* for the list of directory inodes */
87struct dir_inode_entry {
88 struct list_head list; /* list head */
89 struct inode *inode; /* vfs inode pointer */
90};
91
92/* for the list of fsync inodes, used only during recovery */
93struct fsync_inode_entry {
94 struct list_head list; /* list head */
95 struct inode *inode; /* vfs inode pointer */
96 block_t blkaddr; /* block address locating the last inode */
97};
98
99#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
100#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
101
102#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
103#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
104#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
105#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
106
107static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
108{
109 int before = nats_in_cursum(rs);
110 rs->n_nats = cpu_to_le16(before + i);
111 return before;
112}
113
114static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
115{
116 int before = sits_in_cursum(rs);
117 rs->n_sits = cpu_to_le16(before + i);
118 return before;
119}
120
e9750824
NJ		 121/*
122 * ioctl commands
123 */
124#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
125#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
126
127#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
128/*
129 * ioctl commands in 32 bit emulation
130 */
131#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
132#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
133#endif
134
39a53e0c
JK		 135/*
136 * For INODE and NODE manager
137 */
dbe6a5ff
JK		 138/*
139 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
140 * as its node offset to distinguish from index node blocks.
141 * But some bits are used to mark the node block.
142 */
143#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
144 >> OFFSET_BIT_SHIFT)
266e97a8
JK		 145enum {
146 ALLOC_NODE, /* allocate a new node page if needed */
147 LOOKUP_NODE, /* look up a node without readahead */
148 LOOKUP_NODE_RA, /*
149 * look up a node with readahead called
150 * by get_datablock_ro.
39a53e0c 151 */
266e97a8
JK		 152};
153
39a53e0c
JK		 154#define F2FS_LINK_MAX 32000 /* maximum link count per file */
155
156/* for in-memory extent cache entry */
157struct extent_info {
158 rwlock_t ext_lock; /* rwlock for consistency */
159 unsigned int fofs; /* start offset in a file */
160 u32 blk_addr; /* start block address of the extent */
111d2495 161 unsigned int len; /* length of the extent */
39a53e0c
JK		 162};
163
164/*
165 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
166 */
167#define FADVISE_COLD_BIT 0x01
354a3399 168#define FADVISE_LOST_PINO_BIT 0x02
39a53e0c
JK		 169
170struct f2fs_inode_info {
171 struct inode vfs_inode; /* serve a vfs inode */
172 unsigned long i_flags; /* keep an inode flags for ioctl */
173 unsigned char i_advise; /* use to give file attribute hints */
174 unsigned int i_current_depth; /* use only in directory structure */
6666e6aa 175 unsigned int i_pino; /* parent inode number */
39a53e0c
JK		 176 umode_t i_acl_mode; /* keep file acl mode temporarily */
177
178 /* Use below internally in f2fs*/
179 unsigned long flags; /* use to pass per-file flags */
39a53e0c
JK		 180 atomic_t dirty_dents; /* # of dirty dentry pages */
181 f2fs_hash_t chash; /* hash value of given file name */
182 unsigned int clevel; /* maximum level of given file name */
183 nid_t i_xattr_nid; /* node id that contains xattrs */
184 struct extent_info ext; /* in-memory extent cache entry */
185};
186
187static inline void get_extent_info(struct extent_info *ext,
188 struct f2fs_extent i_ext)
189{
190 write_lock(&ext->ext_lock);
191 ext->fofs = le32_to_cpu(i_ext.fofs);
192 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
193 ext->len = le32_to_cpu(i_ext.len);
194 write_unlock(&ext->ext_lock);
195}
196
197static inline void set_raw_extent(struct extent_info *ext,
198 struct f2fs_extent *i_ext)
199{
200 read_lock(&ext->ext_lock);
201 i_ext->fofs = cpu_to_le32(ext->fofs);
202 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
203 i_ext->len = cpu_to_le32(ext->len);
204 read_unlock(&ext->ext_lock);
205}
206
207struct f2fs_nm_info {
208 block_t nat_blkaddr; /* base disk address of NAT */
209 nid_t max_nid; /* maximum possible node ids */
39a53e0c
JK		 210 nid_t next_scan_nid; /* the next nid to be scanned */
211
212 /* NAT cache management */
213 struct radix_tree_root nat_root;/* root of the nat entry cache */
214 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
215 unsigned int nat_cnt; /* the # of cached nat entries */
216 struct list_head nat_entries; /* cached nat entry list (clean) */
217 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
218
219 /* free node ids management */
220 struct list_head free_nid_list; /* a list for free nids */
221 spinlock_t free_nid_list_lock; /* protect free nid list */
222 unsigned int fcnt; /* the number of free node id */
223 struct mutex build_lock; /* lock for build free nids */
224
225 /* for checkpoint */
226 char *nat_bitmap; /* NAT bitmap pointer */
227 int bitmap_size; /* bitmap size */
228};
229
230/*
231 * this structure is used as one of function parameters.
232 * all the information are dedicated to a given direct node block determined
233 * by the data offset in a file.
234 */
235struct dnode_of_data {
236 struct inode *inode; /* vfs inode pointer */
237 struct page *inode_page; /* its inode page, NULL is possible */
238 struct page *node_page; /* cached direct node page */
239 nid_t nid; /* node id of the direct node block */
240 unsigned int ofs_in_node; /* data offset in the node page */
241 bool inode_page_locked; /* inode page is locked or not */
242 block_t data_blkaddr; /* block address of the node block */
243};
244
245static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
246 struct page *ipage, struct page *npage, nid_t nid)
247{
d66d1f76 248 memset(dn, 0, sizeof(*dn));
39a53e0c
JK		 249 dn->inode = inode;
250 dn->inode_page = ipage;
251 dn->node_page = npage;
252 dn->nid = nid;
39a53e0c
JK		 253}
254
255/*
256 * For SIT manager
257 *
258 * By default, there are 6 active log areas across the whole main area.
259 * When considering hot and cold data separation to reduce cleaning overhead,
260 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
261 * respectively.
262 * In the current design, you should not change the numbers intentionally.
263 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
264 * logs individually according to the underlying devices. (default: 6)
265 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
266 * data and 8 for node logs.
267 */
268#define NR_CURSEG_DATA_TYPE (3)
269#define NR_CURSEG_NODE_TYPE (3)
270#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
271
272enum {
273 CURSEG_HOT_DATA = 0, /* directory entry blocks */
274 CURSEG_WARM_DATA, /* data blocks */
275 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
276 CURSEG_HOT_NODE, /* direct node blocks of directory files */
277 CURSEG_WARM_NODE, /* direct node blocks of normal files */
278 CURSEG_COLD_NODE, /* indirect node blocks */
279 NO_CHECK_TYPE
280};
281
282struct f2fs_sm_info {
283 struct sit_info *sit_info; /* whole segment information */
284 struct free_segmap_info *free_info; /* free segment information */
285 struct dirty_seglist_info *dirty_info; /* dirty segment information */
286 struct curseg_info *curseg_array; /* active segment information */
287
288 struct list_head wblist_head; /* list of under-writeback pages */
289 spinlock_t wblist_lock; /* lock for checkpoint */
290
291 block_t seg0_blkaddr; /* block address of 0'th segment */
292 block_t main_blkaddr; /* start block address of main area */
293 block_t ssa_blkaddr; /* start block address of SSA area */
294
295 unsigned int segment_count; /* total # of segments */
296 unsigned int main_segments; /* # of segments in main area */
297 unsigned int reserved_segments; /* # of reserved segments */
298 unsigned int ovp_segments; /* # of overprovision segments */
299};
300
301/*
302 * For directory operation
303 */
304#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
305#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
306#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
307#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
308#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
309
310/*
311 * For superblock
312 */
313/*
314 * COUNT_TYPE for monitoring
315 *
316 * f2fs monitors the number of several block types such as on-writeback,
317 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
318 */
319enum count_type {
320 F2FS_WRITEBACK,
321 F2FS_DIRTY_DENTS,
322 F2FS_DIRTY_NODES,
323 F2FS_DIRTY_META,
324 NR_COUNT_TYPE,
325};
326
327/*
39936837
JK		 328 * Uses as sbi->fs_lock[NR_GLOBAL_LOCKS].
329 * The checkpoint procedure blocks all the locks in this fs_lock array.
330 * Some FS operations grab free locks, and if there is no free lock,
331 * then wait to grab a lock in a round-robin manner.
39a53e0c 332 */
39936837 333#define NR_GLOBAL_LOCKS 8
39a53e0c
JK		 334
335/*
336 * The below are the page types of bios used in submti_bio().
337 * The available types are:
338 * DATA User data pages. It operates as async mode.
339 * NODE Node pages. It operates as async mode.
340 * META FS metadata pages such as SIT, NAT, CP.
341 * NR_PAGE_TYPE The number of page types.
342 * META_FLUSH Make sure the previous pages are written
343 * with waiting the bio's completion
344 * ... Only can be used with META.
345 */
346enum page_type {
347 DATA,
348 NODE,
349 META,
350 NR_PAGE_TYPE,
351 META_FLUSH,
352};
353
354struct f2fs_sb_info {
355 struct super_block *sb; /* pointer to VFS super block */
5e176d54 356 struct proc_dir_entry *s_proc; /* proc entry */
39a53e0c
JK		 357 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
358 struct f2fs_super_block *raw_super; /* raw super block pointer */
359 int s_dirty; /* dirty flag for checkpoint */
360
361 /* for node-related operations */
362 struct f2fs_nm_info *nm_info; /* node manager */
363 struct inode *node_inode; /* cache node blocks */
364
365 /* for segment-related operations */
366 struct f2fs_sm_info *sm_info; /* segment manager */
367 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */
368 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */
369 struct rw_semaphore bio_sem; /* IO semaphore */
370
371 /* for checkpoint */
372 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
373 struct inode *meta_inode; /* cache meta blocks */
39936837
JK		 374 struct mutex cp_mutex; /* checkpoint procedure lock */
375 struct mutex fs_lock[NR_GLOBAL_LOCKS]; /* blocking FS operations */
376 struct mutex node_write; /* locking node writes */
39a53e0c 377 struct mutex writepages; /* mutex for writepages() */
39936837 378 unsigned char next_lock_num; /* round-robin global locks */
39a53e0c 379 int por_doing; /* recovery is doing or not */
55008d84 380 int on_build_free_nids; /* build_free_nids is doing */
39a53e0c
JK		 381
382 /* for orphan inode management */
383 struct list_head orphan_inode_list; /* orphan inode list */
384 struct mutex orphan_inode_mutex; /* for orphan inode list */
385 unsigned int n_orphans; /* # of orphan inodes */
386
387 /* for directory inode management */
388 struct list_head dir_inode_list; /* dir inode list */
389 spinlock_t dir_inode_lock; /* for dir inode list lock */
39a53e0c
JK		 390
391 /* basic file system units */
392 unsigned int log_sectors_per_block; /* log2 sectors per block */
393 unsigned int log_blocksize; /* log2 block size */
394 unsigned int blocksize; /* block size */
395 unsigned int root_ino_num; /* root inode number*/
396 unsigned int node_ino_num; /* node inode number*/
397 unsigned int meta_ino_num; /* meta inode number*/
398 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
399 unsigned int blocks_per_seg; /* blocks per segment */
400 unsigned int segs_per_sec; /* segments per section */
401 unsigned int secs_per_zone; /* sections per zone */
402 unsigned int total_sections; /* total section count */
403 unsigned int total_node_count; /* total node block count */
404 unsigned int total_valid_node_count; /* valid node block count */
405 unsigned int total_valid_inode_count; /* valid inode count */
406 int active_logs; /* # of active logs */
407
408 block_t user_block_count; /* # of user blocks */
409 block_t total_valid_block_count; /* # of valid blocks */
410 block_t alloc_valid_block_count; /* # of allocated blocks */
411 block_t last_valid_block_count; /* for recovery */
412 u32 s_next_generation; /* for NFS support */
413 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
414
415 struct f2fs_mount_info mount_opt; /* mount options */
416
417 /* for cleaning operations */
418 struct mutex gc_mutex; /* mutex for GC */
419 struct f2fs_gc_kthread *gc_thread; /* GC thread */
5ec4e49f 420 unsigned int cur_victim_sec; /* current victim section num */
39a53e0c
JK		 421
422 /*
423 * for stat information.
424 * one is for the LFS mode, and the other is for the SSR mode.
425 */
35b09d82 426#ifdef CONFIG_F2FS_STAT_FS
39a53e0c
JK		 427 struct f2fs_stat_info *stat_info; /* FS status information */
428 unsigned int segment_count[2]; /* # of allocated segments */
429 unsigned int block_count[2]; /* # of allocated blocks */
39a53e0c
JK		 430 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
431 int bg_gc; /* background gc calls */
35b09d82
NJ		 432 unsigned int n_dirty_dirs; /* # of dir inodes */
433#endif
434 unsigned int last_victim[2]; /* last victim segment # */
39a53e0c 435 spinlock_t stat_lock; /* lock for stat operations */
b59d0bae
NJ		 436
437 /* For sysfs suppport */
438 struct kobject s_kobj;
439 struct completion s_kobj_unregister;
39a53e0c
JK		 440};
441
442/*
443 * Inline functions
444 */
445static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
446{
447 return container_of(inode, struct f2fs_inode_info, vfs_inode);
448}
449
450static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
451{
452 return sb->s_fs_info;
453}
454
455static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
456{
457 return (struct f2fs_super_block *)(sbi->raw_super);
458}
459
460static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
461{
462 return (struct f2fs_checkpoint *)(sbi->ckpt);
463}
464
45590710
GZ		 465static inline struct f2fs_node *F2FS_NODE(struct page *page)
466{
467 return (struct f2fs_node *)page_address(page);
468}
469
39a53e0c
JK		 470static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
471{
472 return (struct f2fs_nm_info *)(sbi->nm_info);
473}
474
475static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
476{
477 return (struct f2fs_sm_info *)(sbi->sm_info);
478}
479
480static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
481{
482 return (struct sit_info *)(SM_I(sbi)->sit_info);
483}
484
485static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
486{
487 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
488}
489
490static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
491{
492 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
493}
494
495static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
496{
497 sbi->s_dirty = 1;
498}
499
500static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
501{
502 sbi->s_dirty = 0;
503}
504
25ca923b
JK		 505static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
506{
507 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
508 return ckpt_flags & f;
509}
510
511static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
512{
513 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
514 ckpt_flags |= f;
515 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
516}
517
518static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
519{
520 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
521 ckpt_flags &= (~f);
522 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
523}
524
39936837
JK		 525static inline void mutex_lock_all(struct f2fs_sb_info *sbi)
526{
bfe35965
PZ		 527 int i;
528
529 for (i = 0; i < NR_GLOBAL_LOCKS; i++) {
530 /*
531 * This is the only time we take multiple fs_lock[]
532 * instances; the order is immaterial since we
533 * always hold cp_mutex, which serializes multiple
534 * such operations.
535 */
536 mutex_lock_nest_lock(&sbi->fs_lock[i], &sbi->cp_mutex);
537 }
39936837
JK		 538}
539
540static inline void mutex_unlock_all(struct f2fs_sb_info *sbi)
39a53e0c 541{
39936837
JK		 542 int i = 0;
543 for (; i < NR_GLOBAL_LOCKS; i++)
544 mutex_unlock(&sbi->fs_lock[i]);
39a53e0c
JK		 545}
546
39936837 547static inline int mutex_lock_op(struct f2fs_sb_info *sbi)
39a53e0c 548{
39936837
JK		 549 unsigned char next_lock = sbi->next_lock_num % NR_GLOBAL_LOCKS;
550 int i = 0;
551
552 for (; i < NR_GLOBAL_LOCKS; i++)
553 if (mutex_trylock(&sbi->fs_lock[i]))
554 return i;
555
556 mutex_lock(&sbi->fs_lock[next_lock]);
557 sbi->next_lock_num++;
558 return next_lock;
559}
560
561static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, int ilock)
562{
563 if (ilock < 0)
564 return;
565 BUG_ON(ilock >= NR_GLOBAL_LOCKS);
566 mutex_unlock(&sbi->fs_lock[ilock]);
39a53e0c
JK		 567}
568
569/*
570 * Check whether the given nid is within node id range.
571 */
064e0823 572static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
39a53e0c 573{
064e0823
NJ		 574 WARN_ON((nid >= NM_I(sbi)->max_nid));
575 if (nid >= NM_I(sbi)->max_nid)
576 return -EINVAL;
577 return 0;
39a53e0c
JK		 578}
579
580#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
581
582/*
583 * Check whether the inode has blocks or not
584 */
585static inline int F2FS_HAS_BLOCKS(struct inode *inode)
586{
587 if (F2FS_I(inode)->i_xattr_nid)
588 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
589 else
590 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
591}
592
593static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
594 struct inode *inode, blkcnt_t count)
595{
596 block_t valid_block_count;
597
598 spin_lock(&sbi->stat_lock);
599 valid_block_count =
600 sbi->total_valid_block_count + (block_t)count;
601 if (valid_block_count > sbi->user_block_count) {
602 spin_unlock(&sbi->stat_lock);
603 return false;
604 }
605 inode->i_blocks += count;
606 sbi->total_valid_block_count = valid_block_count;
607 sbi->alloc_valid_block_count += (block_t)count;
608 spin_unlock(&sbi->stat_lock);
609 return true;
610}
611
612static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
613 struct inode *inode,
614 blkcnt_t count)
615{
616 spin_lock(&sbi->stat_lock);
617 BUG_ON(sbi->total_valid_block_count < (block_t) count);
618 BUG_ON(inode->i_blocks < count);
619 inode->i_blocks -= count;
620 sbi->total_valid_block_count -= (block_t)count;
621 spin_unlock(&sbi->stat_lock);
622 return 0;
623}
624
625static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
626{
627 atomic_inc(&sbi->nr_pages[count_type]);
628 F2FS_SET_SB_DIRT(sbi);
629}
630
631static inline void inode_inc_dirty_dents(struct inode *inode)
632{
633 atomic_inc(&F2FS_I(inode)->dirty_dents);
634}
635
636static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
637{
638 atomic_dec(&sbi->nr_pages[count_type]);
639}
640
641static inline void inode_dec_dirty_dents(struct inode *inode)
642{
643 atomic_dec(&F2FS_I(inode)->dirty_dents);
644}
645
646static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
647{
648 return atomic_read(&sbi->nr_pages[count_type]);
649}
650
5ac206cf
NJ		 651static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
652{
653 unsigned int pages_per_sec = sbi->segs_per_sec *
654 (1 << sbi->log_blocks_per_seg);
655 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
656 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
657}
658
39a53e0c
JK		 659static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
660{
661 block_t ret;
662 spin_lock(&sbi->stat_lock);
663 ret = sbi->total_valid_block_count;
664 spin_unlock(&sbi->stat_lock);
665 return ret;
666}
667
668static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
669{
670 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
671
672 /* return NAT or SIT bitmap */
673 if (flag == NAT_BITMAP)
674 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
675 else if (flag == SIT_BITMAP)
676 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
677
678 return 0;
679}
680
681static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
682{
683 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
25ca923b
JK		 684 int offset = (flag == NAT_BITMAP) ?
685 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
39a53e0c
JK		 686 return &ckpt->sit_nat_version_bitmap + offset;
687}
688
689static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
690{
691 block_t start_addr;
692 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
693 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
694
25ca923b 695 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
39a53e0c
JK		 696
697 /*
698 * odd numbered checkpoint should at cp segment 0
699 * and even segent must be at cp segment 1
700 */
701 if (!(ckpt_version & 1))
702 start_addr += sbi->blocks_per_seg;
703
704 return start_addr;
705}
706
707static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
708{
709 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
710}
711
712static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
713 struct inode *inode,
714 unsigned int count)
715{
716 block_t valid_block_count;
717 unsigned int valid_node_count;
718
719 spin_lock(&sbi->stat_lock);
720
721 valid_block_count = sbi->total_valid_block_count + (block_t)count;
722 sbi->alloc_valid_block_count += (block_t)count;
723 valid_node_count = sbi->total_valid_node_count + count;
724
725 if (valid_block_count > sbi->user_block_count) {
726 spin_unlock(&sbi->stat_lock);
727 return false;
728 }
729
730 if (valid_node_count > sbi->total_node_count) {
731 spin_unlock(&sbi->stat_lock);
732 return false;
733 }
734
735 if (inode)
736 inode->i_blocks += count;
737 sbi->total_valid_node_count = valid_node_count;
738 sbi->total_valid_block_count = valid_block_count;
739 spin_unlock(&sbi->stat_lock);
740
741 return true;
742}
743
744static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
745 struct inode *inode,
746 unsigned int count)
747{
748 spin_lock(&sbi->stat_lock);
749
750 BUG_ON(sbi->total_valid_block_count < count);
751 BUG_ON(sbi->total_valid_node_count < count);
752 BUG_ON(inode->i_blocks < count);
753
754 inode->i_blocks -= count;
755 sbi->total_valid_node_count -= count;
756 sbi->total_valid_block_count -= (block_t)count;
757
758 spin_unlock(&sbi->stat_lock);
759}
760
761static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
762{
763 unsigned int ret;
764 spin_lock(&sbi->stat_lock);
765 ret = sbi->total_valid_node_count;
766 spin_unlock(&sbi->stat_lock);
767 return ret;
768}
769
770static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
771{
772 spin_lock(&sbi->stat_lock);
773 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
774 sbi->total_valid_inode_count++;
775 spin_unlock(&sbi->stat_lock);
776}
777
778static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
779{
780 spin_lock(&sbi->stat_lock);
781 BUG_ON(!sbi->total_valid_inode_count);
782 sbi->total_valid_inode_count--;
783 spin_unlock(&sbi->stat_lock);
784 return 0;
785}
786
787static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
788{
789 unsigned int ret;
790 spin_lock(&sbi->stat_lock);
791 ret = sbi->total_valid_inode_count;
792 spin_unlock(&sbi->stat_lock);
793 return ret;
794}
795
796static inline void f2fs_put_page(struct page *page, int unlock)
797{
798 if (!page || IS_ERR(page))
799 return;
800
801 if (unlock) {
802 BUG_ON(!PageLocked(page));
803 unlock_page(page);
804 }
805 page_cache_release(page);
806}
807
808static inline void f2fs_put_dnode(struct dnode_of_data *dn)
809{
810 if (dn->node_page)
811 f2fs_put_page(dn->node_page, 1);
812 if (dn->inode_page && dn->node_page != dn->inode_page)
813 f2fs_put_page(dn->inode_page, 0);
814 dn->node_page = NULL;
815 dn->inode_page = NULL;
816}
817
818static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
819 size_t size, void (*ctor)(void *))
820{
821 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
822}
823
824#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
825
826static inline bool IS_INODE(struct page *page)
827{
45590710 828 struct f2fs_node *p = F2FS_NODE(page);
39a53e0c
JK		 829 return RAW_IS_INODE(p);
830}
831
832static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
833{
834 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
835}
836
837static inline block_t datablock_addr(struct page *node_page,
838 unsigned int offset)
839{
840 struct f2fs_node *raw_node;
841 __le32 *addr_array;
45590710 842 raw_node = F2FS_NODE(node_page);
39a53e0c
JK		 843 addr_array = blkaddr_in_node(raw_node);
844 return le32_to_cpu(addr_array[offset]);
845}
846
847static inline int f2fs_test_bit(unsigned int nr, char *addr)
848{
849 int mask;
850
851 addr += (nr >> 3);
852 mask = 1 << (7 - (nr & 0x07));
853 return mask & *addr;
854}
855
856static inline int f2fs_set_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
868static inline int f2fs_clear_bit(unsigned int nr, char *addr)
869{
870 int mask;
871 int ret;
872
873 addr += (nr >> 3);
874 mask = 1 << (7 - (nr & 0x07));
875 ret = mask & *addr;
876 *addr &= ~mask;
877 return ret;
878}
879
880/* used for f2fs_inode_info->flags */
881enum {
882 FI_NEW_INODE, /* indicate newly allocated inode */
b3783873 883 FI_DIRTY_INODE, /* indicate inode is dirty or not */
39a53e0c
JK		 884 FI_INC_LINK, /* need to increment i_nlink */
885 FI_ACL_MODE, /* indicate acl mode */
886 FI_NO_ALLOC, /* should not allocate any blocks */
699489bb 887 FI_UPDATE_DIR, /* should update inode block for consistency */
74d0b917 888 FI_DELAY_IPUT, /* used for the recovery */
39a53e0c
JK		 889};
890
891static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
892{
893 set_bit(flag, &fi->flags);
894}
895
896static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
897{
898 return test_bit(flag, &fi->flags);
899}
900
901static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
902{
903 clear_bit(flag, &fi->flags);
904}
905
906static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
907{
908 fi->i_acl_mode = mode;
909 set_inode_flag(fi, FI_ACL_MODE);
910}
911
912static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
913{
914 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
915 clear_inode_flag(fi, FI_ACL_MODE);
916 return 1;
917 }
918 return 0;
919}
920
77888c1e
JK		 921static inline int f2fs_readonly(struct super_block *sb)
922{
923 return sb->s_flags & MS_RDONLY;
924}
925
39a53e0c
JK		 926/*
927 * file.c
928 */
929int f2fs_sync_file(struct file *, loff_t, loff_t, int);
930void truncate_data_blocks(struct dnode_of_data *);
931void f2fs_truncate(struct inode *);
2d4d9fb5 932int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
39a53e0c
JK		 933int f2fs_setattr(struct dentry *, struct iattr *);
934int truncate_hole(struct inode *, pgoff_t, pgoff_t);
b292dcab 935int truncate_data_blocks_range(struct dnode_of_data *, int);
39a53e0c 936long f2fs_ioctl(struct file *, unsigned int, unsigned long);
e9750824 937long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
39a53e0c
JK		 938
939/*
940 * inode.c
941 */
942void f2fs_set_inode_flags(struct inode *);
39a53e0c
JK		 943struct inode *f2fs_iget(struct super_block *, unsigned long);
944void update_inode(struct inode *, struct page *);
39936837 945int update_inode_page(struct inode *);
39a53e0c
JK		 946int f2fs_write_inode(struct inode *, struct writeback_control *);
947void f2fs_evict_inode(struct inode *);
948
949/*
950 * namei.c
951 */
952struct dentry *f2fs_get_parent(struct dentry *child);
953
954/*
955 * dir.c
956 */
957struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
958 struct page **);
959struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
960ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
961void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
962 struct page *, struct inode *);
1cd14caf 963int update_dent_inode(struct inode *, const struct qstr *);
b7f7a5e0 964int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
39a53e0c
JK		 965void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
966int f2fs_make_empty(struct inode *, struct inode *);
967bool f2fs_empty_dir(struct inode *);
968
b7f7a5e0
AV		 969static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
970{
971 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
972 inode);
973}
974
39a53e0c
JK		 975/*
976 * super.c
977 */
978int f2fs_sync_fs(struct super_block *, int);
a07ef784
NJ		 979extern __printf(3, 4)
980void f2fs_msg(struct super_block *, const char *, const char *, ...);
39a53e0c
JK		 981
982/*
983 * hash.c
984 */
9836b8b9 985f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
39a53e0c
JK		 986
987/*
988 * node.c
989 */
990struct dnode_of_data;
991struct node_info;
992
993int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
994void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
995int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
996int truncate_inode_blocks(struct inode *, pgoff_t);
997int remove_inode_page(struct inode *);
44a83ff6 998struct page *new_inode_page(struct inode *, const struct qstr *);
8ae8f162 999struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
39a53e0c
JK		 1000void ra_node_page(struct f2fs_sb_info *, nid_t);
1001struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1002struct page *get_node_page_ra(struct page *, int);
1003void sync_inode_page(struct dnode_of_data *);
1004int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1005bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1006void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1007void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1008void recover_node_page(struct f2fs_sb_info *, struct page *,
1009 struct f2fs_summary *, struct node_info *, block_t);
1010int recover_inode_page(struct f2fs_sb_info *, struct page *);
1011int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1012 struct f2fs_summary_block *);
1013void flush_nat_entries(struct f2fs_sb_info *);
1014int build_node_manager(struct f2fs_sb_info *);
1015void destroy_node_manager(struct f2fs_sb_info *);
6e6093a8 1016int __init create_node_manager_caches(void);
39a53e0c
JK		 1017void destroy_node_manager_caches(void);
1018
1019/*
1020 * segment.c
1021 */
1022void f2fs_balance_fs(struct f2fs_sb_info *);
1023void invalidate_blocks(struct f2fs_sb_info *, block_t);
39a53e0c
JK		 1024void clear_prefree_segments(struct f2fs_sb_info *);
1025int npages_for_summary_flush(struct f2fs_sb_info *);
1026void allocate_new_segments(struct f2fs_sb_info *);
1027struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
3cd8a239 1028struct bio *f2fs_bio_alloc(struct block_device *, int);
a569469e
JX		 1029void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool);
1030void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
577e3495 1031void write_meta_page(struct f2fs_sb_info *, struct page *);
39a53e0c
JK		 1032void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1033 block_t, block_t *);
1034void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1035 block_t, block_t *);
1036void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1037void recover_data_page(struct f2fs_sb_info *, struct page *,
1038 struct f2fs_summary *, block_t, block_t);
1039void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1040 struct f2fs_summary *, block_t, block_t);
1041void write_data_summaries(struct f2fs_sb_info *, block_t);
1042void write_node_summaries(struct f2fs_sb_info *, block_t);
1043int lookup_journal_in_cursum(struct f2fs_summary_block *,
1044 int, unsigned int, int);
1045void flush_sit_entries(struct f2fs_sb_info *);
1046int build_segment_manager(struct f2fs_sb_info *);
39a53e0c
JK		 1047void destroy_segment_manager(struct f2fs_sb_info *);
1048
1049/*
1050 * checkpoint.c
1051 */
1052struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1053struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1054long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
cbd56e7d
JK		 1055int acquire_orphan_inode(struct f2fs_sb_info *);
1056void release_orphan_inode(struct f2fs_sb_info *);
39a53e0c
JK		 1057void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1058void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1059int recover_orphan_inodes(struct f2fs_sb_info *);
1060int get_valid_checkpoint(struct f2fs_sb_info *);
1061void set_dirty_dir_page(struct inode *, struct page *);
5deb8267 1062void add_dirty_dir_inode(struct inode *);
39a53e0c 1063void remove_dirty_dir_inode(struct inode *);
74d0b917 1064struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
39a53e0c 1065void sync_dirty_dir_inodes(struct f2fs_sb_info *);
43727527 1066void write_checkpoint(struct f2fs_sb_info *, bool);
39a53e0c 1067void init_orphan_info(struct f2fs_sb_info *);
6e6093a8 1068int __init create_checkpoint_caches(void);
39a53e0c
JK		 1069void destroy_checkpoint_caches(void);
1070
1071/*
1072 * data.c
1073 */
1074int reserve_new_block(struct dnode_of_data *);
1075void update_extent_cache(block_t, struct dnode_of_data *);
c718379b 1076struct page *find_data_page(struct inode *, pgoff_t, bool);
39a53e0c 1077struct page *get_lock_data_page(struct inode *, pgoff_t);
64aa7ed9 1078struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
39a53e0c
JK		 1079int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
1080int do_write_data_page(struct page *);
1081
1082/*
1083 * gc.c
1084 */
1085int start_gc_thread(struct f2fs_sb_info *);
1086void stop_gc_thread(struct f2fs_sb_info *);
1087block_t start_bidx_of_node(unsigned int);
408e9375 1088int f2fs_gc(struct f2fs_sb_info *);
39a53e0c 1089void build_gc_manager(struct f2fs_sb_info *);
6e6093a8 1090int __init create_gc_caches(void);
39a53e0c
JK		 1091void destroy_gc_caches(void);
1092
1093/*
1094 * recovery.c
1095 */
6ead1142 1096int recover_fsync_data(struct f2fs_sb_info *);
39a53e0c
JK		 1097bool space_for_roll_forward(struct f2fs_sb_info *);
1098
1099/*
1100 * debug.c
1101 */
1102#ifdef CONFIG_F2FS_STAT_FS
1103struct f2fs_stat_info {
1104 struct list_head stat_list;
1105 struct f2fs_sb_info *sbi;
1106 struct mutex stat_lock;
1107 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1108 int main_area_segs, main_area_sections, main_area_zones;
1109 int hit_ext, total_ext;
1110 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1111 int nats, sits, fnids;
1112 int total_count, utilization;
1113 int bg_gc;
1114 unsigned int valid_count, valid_node_count, valid_inode_count;
1115 unsigned int bimodal, avg_vblocks;
1116 int util_free, util_valid, util_invalid;
1117 int rsvd_segs, overp_segs;
1118 int dirty_count, node_pages, meta_pages;
1119 int prefree_count, call_count;
1120 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1121 int tot_blks, data_blks, node_blks;
1122 int curseg[NR_CURSEG_TYPE];
1123 int cursec[NR_CURSEG_TYPE];
1124 int curzone[NR_CURSEG_TYPE];
1125
1126 unsigned int segment_count[2];
1127 unsigned int block_count[2];
1128 unsigned base_mem, cache_mem;
1129};
1130
963d4f7d
GZ		 1131static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1132{
1133 return (struct f2fs_stat_info*)sbi->stat_info;
1134}
1135
39a53e0c
JK		 1136#define stat_inc_call_count(si) ((si)->call_count++)
1137
1138#define stat_inc_seg_count(sbi, type) \
1139 do { \
963d4f7d 1140 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1141 (si)->tot_segs++; \
1142 if (type == SUM_TYPE_DATA) \
1143 si->data_segs++; \
1144 else \
1145 si->node_segs++; \
1146 } while (0)
1147
1148#define stat_inc_tot_blk_count(si, blks) \
1149 (si->tot_blks += (blks))
1150
1151#define stat_inc_data_blk_count(sbi, blks) \
1152 do { \
963d4f7d 1153 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1154 stat_inc_tot_blk_count(si, blks); \
1155 si->data_blks += (blks); \
1156 } while (0)
1157
1158#define stat_inc_node_blk_count(sbi, blks) \
1159 do { \
963d4f7d 1160 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK		 1161 stat_inc_tot_blk_count(si, blks); \
1162 si->node_blks += (blks); \
1163 } while (0)
1164
1165int f2fs_build_stats(struct f2fs_sb_info *);
1166void f2fs_destroy_stats(struct f2fs_sb_info *);
6e6093a8 1167void __init f2fs_create_root_stats(void);
4589d25d 1168void f2fs_destroy_root_stats(void);
39a53e0c
JK		 1169#else
1170#define stat_inc_call_count(si)
1171#define stat_inc_seg_count(si, type)
1172#define stat_inc_tot_blk_count(si, blks)
1173#define stat_inc_data_blk_count(si, blks)
1174#define stat_inc_node_blk_count(sbi, blks)
1175
1176static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1177static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
6e6093a8 1178static inline void __init f2fs_create_root_stats(void) { }
4589d25d 1179static inline void f2fs_destroy_root_stats(void) { }
39a53e0c
JK		 1180#endif
1181
1182extern const struct file_operations f2fs_dir_operations;
1183extern const struct file_operations f2fs_file_operations;
1184extern const struct inode_operations f2fs_file_inode_operations;
1185extern const struct address_space_operations f2fs_dblock_aops;
1186extern const struct address_space_operations f2fs_node_aops;
1187extern const struct address_space_operations f2fs_meta_aops;
1188extern const struct inode_operations f2fs_dir_inode_operations;
1189extern const struct inode_operations f2fs_symlink_inode_operations;
1190extern const struct inode_operations f2fs_special_inode_operations;
1191#endif