~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/f2fs/f2fs.h

Version: ~ [ linux-5.4-rc3 ] ~ [ linux-5.3.6 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.79 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.149 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.196 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.196 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.75 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  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>
 17 #include <linux/slab.h>
 18 #include <linux/crc32.h>
 19 #include <linux/magic.h>
 20 
 21 /*
 22  * For mount options
 23  */
 24 #define F2FS_MOUNT_BG_GC                0x00000001
 25 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
 26 #define F2FS_MOUNT_DISCARD              0x00000004
 27 #define F2FS_MOUNT_NOHEAP               0x00000008
 28 #define F2FS_MOUNT_XATTR_USER           0x00000010
 29 #define F2FS_MOUNT_POSIX_ACL            0x00000020
 30 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
 31 
 32 #define clear_opt(sbi, option)  (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
 33 #define set_opt(sbi, option)    (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
 34 #define test_opt(sbi, option)   (sbi->mount_opt.opt & F2FS_MOUNT_##option)
 35 
 36 #define ver_after(a, b) (typecheck(unsigned long long, a) &&            \
 37                 typecheck(unsigned long long, b) &&                     \
 38                 ((long long)((a) - (b)) > 0))
 39 
 40 typedef u32 block_t;    /*
 41                          * should not change u32, since it is the on-disk block
 42                          * address format, __le32.
 43                          */
 44 typedef u32 nid_t;
 45 
 46 struct f2fs_mount_info {
 47         unsigned int    opt;
 48 };
 49 
 50 #define CRCPOLY_LE 0xedb88320
 51 
 52 static inline __u32 f2fs_crc32(void *buf, size_t len)
 53 {
 54         unsigned char *p = (unsigned char *)buf;
 55         __u32 crc = F2FS_SUPER_MAGIC;
 56         int i;
 57 
 58         while (len--) {
 59                 crc ^= *p++;
 60                 for (i = 0; i < 8; i++)
 61                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 62         }
 63         return crc;
 64 }
 65 
 66 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
 67 {
 68         return f2fs_crc32(buf, buf_size) == blk_crc;
 69 }
 70 
 71 /*
 72  * For checkpoint manager
 73  */
 74 enum {
 75         NAT_BITMAP,
 76         SIT_BITMAP
 77 };
 78 
 79 /* for the list of orphan inodes */
 80 struct orphan_inode_entry {
 81         struct list_head list;  /* list head */
 82         nid_t ino;              /* inode number */
 83 };
 84 
 85 /* for the list of directory inodes */
 86 struct dir_inode_entry {
 87         struct list_head list;  /* list head */
 88         struct inode *inode;    /* vfs inode pointer */
 89 };
 90 
 91 /* for the list of fsync inodes, used only during recovery */
 92 struct fsync_inode_entry {
 93         struct list_head list;  /* list head */
 94         struct inode *inode;    /* vfs inode pointer */
 95         block_t blkaddr;        /* block address locating the last inode */
 96 };
 97 
 98 #define nats_in_cursum(sum)             (le16_to_cpu(sum->n_nats))
 99 #define sits_in_cursum(sum)             (le16_to_cpu(sum->n_sits))
100 
101 #define nat_in_journal(sum, i)          (sum->nat_j.entries[i].ne)
102 #define nid_in_journal(sum, i)          (sum->nat_j.entries[i].nid)
103 #define sit_in_journal(sum, i)          (sum->sit_j.entries[i].se)
104 #define segno_in_journal(sum, i)        (sum->sit_j.entries[i].segno)
105 
106 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
107 {
108         int before = nats_in_cursum(rs);
109         rs->n_nats = cpu_to_le16(before + i);
110         return before;
111 }
112 
113 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
114 {
115         int before = sits_in_cursum(rs);
116         rs->n_sits = cpu_to_le16(before + i);
117         return before;
118 }
119 
120 /*
121  * ioctl commands
122  */
123 #define F2FS_IOC_GETFLAGS               FS_IOC_GETFLAGS
124 #define F2FS_IOC_SETFLAGS               FS_IOC_SETFLAGS
125 
126 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
127 /*
128  * ioctl commands in 32 bit emulation
129  */
130 #define F2FS_IOC32_GETFLAGS             FS_IOC32_GETFLAGS
131 #define F2FS_IOC32_SETFLAGS             FS_IOC32_SETFLAGS
132 #endif
133 
134 /*
135  * For INODE and NODE manager
136  */
137 #define XATTR_NODE_OFFSET       (-1)    /*
138                                          * store xattrs to one node block per
139                                          * file keeping -1 as its node offset to
140                                          * distinguish from index node blocks.
141                                          */
142 enum {
143         ALLOC_NODE,                     /* allocate a new node page if needed */
144         LOOKUP_NODE,                    /* look up a node without readahead */
145         LOOKUP_NODE_RA,                 /*
146                                          * look up a node with readahead called
147                                          * by get_datablock_ro.
148                                          */
149 };
150 
151 #define F2FS_LINK_MAX           32000   /* maximum link count per file */
152 
153 /* for in-memory extent cache entry */
154 struct extent_info {
155         rwlock_t ext_lock;      /* rwlock for consistency */
156         unsigned int fofs;      /* start offset in a file */
157         u32 blk_addr;           /* start block address of the extent */
158         unsigned int len;       /* length of the extent */
159 };
160 
161 /*
162  * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
163  */
164 #define FADVISE_COLD_BIT        0x01
165 #define FADVISE_LOST_PINO_BIT   0x02
166 
167 struct f2fs_inode_info {
168         struct inode vfs_inode;         /* serve a vfs inode */
169         unsigned long i_flags;          /* keep an inode flags for ioctl */
170         unsigned char i_advise;         /* use to give file attribute hints */
171         unsigned int i_current_depth;   /* use only in directory structure */
172         unsigned int i_pino;            /* parent inode number */
173         umode_t i_acl_mode;             /* keep file acl mode temporarily */
174 
175         /* Use below internally in f2fs*/
176         unsigned long flags;            /* use to pass per-file flags */
177         atomic_t dirty_dents;           /* # of dirty dentry pages */
178         f2fs_hash_t chash;              /* hash value of given file name */
179         unsigned int clevel;            /* maximum level of given file name */
180         nid_t i_xattr_nid;              /* node id that contains xattrs */
181         struct extent_info ext;         /* in-memory extent cache entry */
182 };
183 
184 static inline void get_extent_info(struct extent_info *ext,
185                                         struct f2fs_extent i_ext)
186 {
187         write_lock(&ext->ext_lock);
188         ext->fofs = le32_to_cpu(i_ext.fofs);
189         ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
190         ext->len = le32_to_cpu(i_ext.len);
191         write_unlock(&ext->ext_lock);
192 }
193 
194 static inline void set_raw_extent(struct extent_info *ext,
195                                         struct f2fs_extent *i_ext)
196 {
197         read_lock(&ext->ext_lock);
198         i_ext->fofs = cpu_to_le32(ext->fofs);
199         i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
200         i_ext->len = cpu_to_le32(ext->len);
201         read_unlock(&ext->ext_lock);
202 }
203 
204 struct f2fs_nm_info {
205         block_t nat_blkaddr;            /* base disk address of NAT */
206         nid_t max_nid;                  /* maximum possible node ids */
207         nid_t next_scan_nid;            /* the next nid to be scanned */
208 
209         /* NAT cache management */
210         struct radix_tree_root nat_root;/* root of the nat entry cache */
211         rwlock_t nat_tree_lock;         /* protect nat_tree_lock */
212         unsigned int nat_cnt;           /* the # of cached nat entries */
213         struct list_head nat_entries;   /* cached nat entry list (clean) */
214         struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
215 
216         /* free node ids management */
217         struct list_head free_nid_list; /* a list for free nids */
218         spinlock_t free_nid_list_lock;  /* protect free nid list */
219         unsigned int fcnt;              /* the number of free node id */
220         struct mutex build_lock;        /* lock for build free nids */
221 
222         /* for checkpoint */
223         char *nat_bitmap;               /* NAT bitmap pointer */
224         int bitmap_size;                /* bitmap size */
225 };
226 
227 /*
228  * this structure is used as one of function parameters.
229  * all the information are dedicated to a given direct node block determined
230  * by the data offset in a file.
231  */
232 struct dnode_of_data {
233         struct inode *inode;            /* vfs inode pointer */
234         struct page *inode_page;        /* its inode page, NULL is possible */
235         struct page *node_page;         /* cached direct node page */
236         nid_t nid;                      /* node id of the direct node block */
237         unsigned int ofs_in_node;       /* data offset in the node page */
238         bool inode_page_locked;         /* inode page is locked or not */
239         block_t data_blkaddr;           /* block address of the node block */
240 };
241 
242 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
243                 struct page *ipage, struct page *npage, nid_t nid)
244 {
245         memset(dn, 0, sizeof(*dn));
246         dn->inode = inode;
247         dn->inode_page = ipage;
248         dn->node_page = npage;
249         dn->nid = nid;
250 }
251 
252 /*
253  * For SIT manager
254  *
255  * By default, there are 6 active log areas across the whole main area.
256  * When considering hot and cold data separation to reduce cleaning overhead,
257  * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
258  * respectively.
259  * In the current design, you should not change the numbers intentionally.
260  * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
261  * logs individually according to the underlying devices. (default: 6)
262  * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
263  * data and 8 for node logs.
264  */
265 #define NR_CURSEG_DATA_TYPE     (3)
266 #define NR_CURSEG_NODE_TYPE     (3)
267 #define NR_CURSEG_TYPE  (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
268 
269 enum {
270         CURSEG_HOT_DATA = 0,    /* directory entry blocks */
271         CURSEG_WARM_DATA,       /* data blocks */
272         CURSEG_COLD_DATA,       /* multimedia or GCed data blocks */
273         CURSEG_HOT_NODE,        /* direct node blocks of directory files */
274         CURSEG_WARM_NODE,       /* direct node blocks of normal files */
275         CURSEG_COLD_NODE,       /* indirect node blocks */
276         NO_CHECK_TYPE
277 };
278 
279 struct f2fs_sm_info {
280         struct sit_info *sit_info;              /* whole segment information */
281         struct free_segmap_info *free_info;     /* free segment information */
282         struct dirty_seglist_info *dirty_info;  /* dirty segment information */
283         struct curseg_info *curseg_array;       /* active segment information */
284 
285         struct list_head wblist_head;   /* list of under-writeback pages */
286         spinlock_t wblist_lock;         /* lock for checkpoint */
287 
288         block_t seg0_blkaddr;           /* block address of 0'th segment */
289         block_t main_blkaddr;           /* start block address of main area */
290         block_t ssa_blkaddr;            /* start block address of SSA area */
291 
292         unsigned int segment_count;     /* total # of segments */
293         unsigned int main_segments;     /* # of segments in main area */
294         unsigned int reserved_segments; /* # of reserved segments */
295         unsigned int ovp_segments;      /* # of overprovision segments */
296 };
297 
298 /*
299  * For directory operation
300  */
301 #define NODE_DIR1_BLOCK         (ADDRS_PER_INODE + 1)
302 #define NODE_DIR2_BLOCK         (ADDRS_PER_INODE + 2)
303 #define NODE_IND1_BLOCK         (ADDRS_PER_INODE + 3)
304 #define NODE_IND2_BLOCK         (ADDRS_PER_INODE + 4)
305 #define NODE_DIND_BLOCK         (ADDRS_PER_INODE + 5)
306 
307 /*
308  * For superblock
309  */
310 /*
311  * COUNT_TYPE for monitoring
312  *
313  * f2fs monitors the number of several block types such as on-writeback,
314  * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
315  */
316 enum count_type {
317         F2FS_WRITEBACK,
318         F2FS_DIRTY_DENTS,
319         F2FS_DIRTY_NODES,
320         F2FS_DIRTY_META,
321         NR_COUNT_TYPE,
322 };
323 
324 /*
325  * Uses as sbi->fs_lock[NR_GLOBAL_LOCKS].
326  * The checkpoint procedure blocks all the locks in this fs_lock array.
327  * Some FS operations grab free locks, and if there is no free lock,
328  * then wait to grab a lock in a round-robin manner.
329  */
330 #define NR_GLOBAL_LOCKS 8
331 
332 /*
333  * The below are the page types of bios used in submti_bio().
334  * The available types are:
335  * DATA                 User data pages. It operates as async mode.
336  * NODE                 Node pages. It operates as async mode.
337  * META                 FS metadata pages such as SIT, NAT, CP.
338  * NR_PAGE_TYPE         The number of page types.
339  * META_FLUSH           Make sure the previous pages are written
340  *                      with waiting the bio's completion
341  * ...                  Only can be used with META.
342  */
343 enum page_type {
344         DATA,
345         NODE,
346         META,
347         NR_PAGE_TYPE,
348         META_FLUSH,
349 };
350 
351 struct f2fs_sb_info {
352         struct super_block *sb;                 /* pointer to VFS super block */
353         struct buffer_head *raw_super_buf;      /* buffer head of raw sb */
354         struct f2fs_super_block *raw_super;     /* raw super block pointer */
355         int s_dirty;                            /* dirty flag for checkpoint */
356 
357         /* for node-related operations */
358         struct f2fs_nm_info *nm_info;           /* node manager */
359         struct inode *node_inode;               /* cache node blocks */
360 
361         /* for segment-related operations */
362         struct f2fs_sm_info *sm_info;           /* segment manager */
363         struct bio *bio[NR_PAGE_TYPE];          /* bios to merge */
364         sector_t last_block_in_bio[NR_PAGE_TYPE];       /* last block number */
365         struct rw_semaphore bio_sem;            /* IO semaphore */
366 
367         /* for checkpoint */
368         struct f2fs_checkpoint *ckpt;           /* raw checkpoint pointer */
369         struct inode *meta_inode;               /* cache meta blocks */
370         struct mutex cp_mutex;                  /* checkpoint procedure lock */
371         struct mutex fs_lock[NR_GLOBAL_LOCKS];  /* blocking FS operations */
372         struct mutex node_write;                /* locking node writes */
373         struct mutex writepages;                /* mutex for writepages() */
374         unsigned char next_lock_num;            /* round-robin global locks */
375         int por_doing;                          /* recovery is doing or not */
376         int on_build_free_nids;                 /* build_free_nids is doing */
377 
378         /* for orphan inode management */
379         struct list_head orphan_inode_list;     /* orphan inode list */
380         struct mutex orphan_inode_mutex;        /* for orphan inode list */
381         unsigned int n_orphans;                 /* # of orphan inodes */
382 
383         /* for directory inode management */
384         struct list_head dir_inode_list;        /* dir inode list */
385         spinlock_t dir_inode_lock;              /* for dir inode list lock */
386 
387         /* basic file system units */
388         unsigned int log_sectors_per_block;     /* log2 sectors per block */
389         unsigned int log_blocksize;             /* log2 block size */
390         unsigned int blocksize;                 /* block size */
391         unsigned int root_ino_num;              /* root inode number*/
392         unsigned int node_ino_num;              /* node inode number*/
393         unsigned int meta_ino_num;              /* meta inode number*/
394         unsigned int log_blocks_per_seg;        /* log2 blocks per segment */
395         unsigned int blocks_per_seg;            /* blocks per segment */
396         unsigned int segs_per_sec;              /* segments per section */
397         unsigned int secs_per_zone;             /* sections per zone */
398         unsigned int total_sections;            /* total section count */
399         unsigned int total_node_count;          /* total node block count */
400         unsigned int total_valid_node_count;    /* valid node block count */
401         unsigned int total_valid_inode_count;   /* valid inode count */
402         int active_logs;                        /* # of active logs */
403 
404         block_t user_block_count;               /* # of user blocks */
405         block_t total_valid_block_count;        /* # of valid blocks */
406         block_t alloc_valid_block_count;        /* # of allocated blocks */
407         block_t last_valid_block_count;         /* for recovery */
408         u32 s_next_generation;                  /* for NFS support */
409         atomic_t nr_pages[NR_COUNT_TYPE];       /* # of pages, see count_type */
410 
411         struct f2fs_mount_info mount_opt;       /* mount options */
412 
413         /* for cleaning operations */
414         struct mutex gc_mutex;                  /* mutex for GC */
415         struct f2fs_gc_kthread  *gc_thread;     /* GC thread */
416         unsigned int cur_victim_sec;            /* current victim section num */
417 
418         /*
419          * for stat information.
420          * one is for the LFS mode, and the other is for the SSR mode.
421          */
422 #ifdef CONFIG_F2FS_STAT_FS
423         struct f2fs_stat_info *stat_info;       /* FS status information */
424         unsigned int segment_count[2];          /* # of allocated segments */
425         unsigned int block_count[2];            /* # of allocated blocks */
426         int total_hit_ext, read_hit_ext;        /* extent cache hit ratio */
427         int bg_gc;                              /* background gc calls */
428         unsigned int n_dirty_dirs;              /* # of dir inodes */
429 #endif
430         unsigned int last_victim[2];            /* last victim segment # */
431         spinlock_t stat_lock;                   /* lock for stat operations */
432 };
433 
434 /*
435  * Inline functions
436  */
437 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
438 {
439         return container_of(inode, struct f2fs_inode_info, vfs_inode);
440 }
441 
442 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
443 {
444         return sb->s_fs_info;
445 }
446 
447 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
448 {
449         return (struct f2fs_super_block *)(sbi->raw_super);
450 }
451 
452 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
453 {
454         return (struct f2fs_checkpoint *)(sbi->ckpt);
455 }
456 
457 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
458 {
459         return (struct f2fs_nm_info *)(sbi->nm_info);
460 }
461 
462 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
463 {
464         return (struct f2fs_sm_info *)(sbi->sm_info);
465 }
466 
467 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
468 {
469         return (struct sit_info *)(SM_I(sbi)->sit_info);
470 }
471 
472 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
473 {
474         return (struct free_segmap_info *)(SM_I(sbi)->free_info);
475 }
476 
477 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
478 {
479         return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
480 }
481 
482 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
483 {
484         sbi->s_dirty = 1;
485 }
486 
487 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
488 {
489         sbi->s_dirty = 0;
490 }
491 
492 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
493 {
494         unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
495         return ckpt_flags & f;
496 }
497 
498 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
499 {
500         unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
501         ckpt_flags |= f;
502         cp->ckpt_flags = cpu_to_le32(ckpt_flags);
503 }
504 
505 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
506 {
507         unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
508         ckpt_flags &= (~f);
509         cp->ckpt_flags = cpu_to_le32(ckpt_flags);
510 }
511 
512 static inline void mutex_lock_all(struct f2fs_sb_info *sbi)
513 {
514         int i;
515 
516         for (i = 0; i < NR_GLOBAL_LOCKS; i++) {
517                 /*
518                  * This is the only time we take multiple fs_lock[]
519                  * instances; the order is immaterial since we
520                  * always hold cp_mutex, which serializes multiple
521                  * such operations.
522                  */
523                 mutex_lock_nest_lock(&sbi->fs_lock[i], &sbi->cp_mutex);
524         }
525 }
526 
527 static inline void mutex_unlock_all(struct f2fs_sb_info *sbi)
528 {
529         int i = 0;
530         for (; i < NR_GLOBAL_LOCKS; i++)
531                 mutex_unlock(&sbi->fs_lock[i]);
532 }
533 
534 static inline int mutex_lock_op(struct f2fs_sb_info *sbi)
535 {
536         unsigned char next_lock = sbi->next_lock_num % NR_GLOBAL_LOCKS;
537         int i = 0;
538 
539         for (; i < NR_GLOBAL_LOCKS; i++)
540                 if (mutex_trylock(&sbi->fs_lock[i]))
541                         return i;
542 
543         mutex_lock(&sbi->fs_lock[next_lock]);
544         sbi->next_lock_num++;
545         return next_lock;
546 }
547 
548 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, int ilock)
549 {
550         if (ilock < 0)
551                 return;
552         BUG_ON(ilock >= NR_GLOBAL_LOCKS);
553         mutex_unlock(&sbi->fs_lock[ilock]);
554 }
555 
556 /*
557  * Check whether the given nid is within node id range.
558  */
559 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
560 {
561         WARN_ON((nid >= NM_I(sbi)->max_nid));
562         if (nid >= NM_I(sbi)->max_nid)
563                 return -EINVAL;
564         return 0;
565 }
566 
567 #define F2FS_DEFAULT_ALLOCATED_BLOCKS   1
568 
569 /*
570  * Check whether the inode has blocks or not
571  */
572 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
573 {
574         if (F2FS_I(inode)->i_xattr_nid)
575                 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
576         else
577                 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
578 }
579 
580 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
581                                  struct inode *inode, blkcnt_t count)
582 {
583         block_t valid_block_count;
584 
585         spin_lock(&sbi->stat_lock);
586         valid_block_count =
587                 sbi->total_valid_block_count + (block_t)count;
588         if (valid_block_count > sbi->user_block_count) {
589                 spin_unlock(&sbi->stat_lock);
590                 return false;
591         }
592         inode->i_blocks += count;
593         sbi->total_valid_block_count = valid_block_count;
594         sbi->alloc_valid_block_count += (block_t)count;
595         spin_unlock(&sbi->stat_lock);
596         return true;
597 }
598 
599 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
600                                                 struct inode *inode,
601                                                 blkcnt_t count)
602 {
603         spin_lock(&sbi->stat_lock);
604         BUG_ON(sbi->total_valid_block_count < (block_t) count);
605         BUG_ON(inode->i_blocks < count);
606         inode->i_blocks -= count;
607         sbi->total_valid_block_count -= (block_t)count;
608         spin_unlock(&sbi->stat_lock);
609         return 0;
610 }
611 
612 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
613 {
614         atomic_inc(&sbi->nr_pages[count_type]);
615         F2FS_SET_SB_DIRT(sbi);
616 }
617 
618 static inline void inode_inc_dirty_dents(struct inode *inode)
619 {
620         atomic_inc(&F2FS_I(inode)->dirty_dents);
621 }
622 
623 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
624 {
625         atomic_dec(&sbi->nr_pages[count_type]);
626 }
627 
628 static inline void inode_dec_dirty_dents(struct inode *inode)
629 {
630         atomic_dec(&F2FS_I(inode)->dirty_dents);
631 }
632 
633 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
634 {
635         return atomic_read(&sbi->nr_pages[count_type]);
636 }
637 
638 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
639 {
640         unsigned int pages_per_sec = sbi->segs_per_sec *
641                                         (1 << sbi->log_blocks_per_seg);
642         return ((get_pages(sbi, block_type) + pages_per_sec - 1)
643                         >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
644 }
645 
646 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
647 {
648         block_t ret;
649         spin_lock(&sbi->stat_lock);
650         ret = sbi->total_valid_block_count;
651         spin_unlock(&sbi->stat_lock);
652         return ret;
653 }
654 
655 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
656 {
657         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
658 
659         /* return NAT or SIT bitmap */
660         if (flag == NAT_BITMAP)
661                 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
662         else if (flag == SIT_BITMAP)
663                 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
664 
665         return 0;
666 }
667 
668 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
669 {
670         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
671         int offset = (flag == NAT_BITMAP) ?
672                         le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
673         return &ckpt->sit_nat_version_bitmap + offset;
674 }
675 
676 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
677 {
678         block_t start_addr;
679         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
680         unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
681 
682         start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
683 
684         /*
685          * odd numbered checkpoint should at cp segment 0
686          * and even segent must be at cp segment 1
687          */
688         if (!(ckpt_version & 1))
689                 start_addr += sbi->blocks_per_seg;
690 
691         return start_addr;
692 }
693 
694 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
695 {
696         return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
697 }
698 
699 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
700                                                 struct inode *inode,
701                                                 unsigned int count)
702 {
703         block_t valid_block_count;
704         unsigned int valid_node_count;
705 
706         spin_lock(&sbi->stat_lock);
707 
708         valid_block_count = sbi->total_valid_block_count + (block_t)count;
709         sbi->alloc_valid_block_count += (block_t)count;
710         valid_node_count = sbi->total_valid_node_count + count;
711 
712         if (valid_block_count > sbi->user_block_count) {
713                 spin_unlock(&sbi->stat_lock);
714                 return false;
715         }
716 
717         if (valid_node_count > sbi->total_node_count) {
718                 spin_unlock(&sbi->stat_lock);
719                 return false;
720         }
721 
722         if (inode)
723                 inode->i_blocks += count;
724         sbi->total_valid_node_count = valid_node_count;
725         sbi->total_valid_block_count = valid_block_count;
726         spin_unlock(&sbi->stat_lock);
727 
728         return true;
729 }
730 
731 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
732                                                 struct inode *inode,
733                                                 unsigned int count)
734 {
735         spin_lock(&sbi->stat_lock);
736 
737         BUG_ON(sbi->total_valid_block_count < count);
738         BUG_ON(sbi->total_valid_node_count < count);
739         BUG_ON(inode->i_blocks < count);
740 
741         inode->i_blocks -= count;
742         sbi->total_valid_node_count -= count;
743         sbi->total_valid_block_count -= (block_t)count;
744 
745         spin_unlock(&sbi->stat_lock);
746 }
747 
748 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
749 {
750         unsigned int ret;
751         spin_lock(&sbi->stat_lock);
752         ret = sbi->total_valid_node_count;
753         spin_unlock(&sbi->stat_lock);
754         return ret;
755 }
756 
757 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
758 {
759         spin_lock(&sbi->stat_lock);
760         BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
761         sbi->total_valid_inode_count++;
762         spin_unlock(&sbi->stat_lock);
763 }
764 
765 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
766 {
767         spin_lock(&sbi->stat_lock);
768         BUG_ON(!sbi->total_valid_inode_count);
769         sbi->total_valid_inode_count--;
770         spin_unlock(&sbi->stat_lock);
771         return 0;
772 }
773 
774 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
775 {
776         unsigned int ret;
777         spin_lock(&sbi->stat_lock);
778         ret = sbi->total_valid_inode_count;
779         spin_unlock(&sbi->stat_lock);
780         return ret;
781 }
782 
783 static inline void f2fs_put_page(struct page *page, int unlock)
784 {
785         if (!page || IS_ERR(page))
786                 return;
787 
788         if (unlock) {
789                 BUG_ON(!PageLocked(page));
790                 unlock_page(page);
791         }
792         page_cache_release(page);
793 }
794 
795 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
796 {
797         if (dn->node_page)
798                 f2fs_put_page(dn->node_page, 1);
799         if (dn->inode_page && dn->node_page != dn->inode_page)
800                 f2fs_put_page(dn->inode_page, 0);
801         dn->node_page = NULL;
802         dn->inode_page = NULL;
803 }
804 
805 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
806                                         size_t size, void (*ctor)(void *))
807 {
808         return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
809 }
810 
811 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
812 
813 static inline bool IS_INODE(struct page *page)
814 {
815         struct f2fs_node *p = (struct f2fs_node *)page_address(page);
816         return RAW_IS_INODE(p);
817 }
818 
819 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
820 {
821         return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
822 }
823 
824 static inline block_t datablock_addr(struct page *node_page,
825                 unsigned int offset)
826 {
827         struct f2fs_node *raw_node;
828         __le32 *addr_array;
829         raw_node = (struct f2fs_node *)page_address(node_page);
830         addr_array = blkaddr_in_node(raw_node);
831         return le32_to_cpu(addr_array[offset]);
832 }
833 
834 static inline int f2fs_test_bit(unsigned int nr, char *addr)
835 {
836         int mask;
837 
838         addr += (nr >> 3);
839         mask = 1 << (7 - (nr & 0x07));
840         return mask & *addr;
841 }
842 
843 static inline int f2fs_set_bit(unsigned int nr, char *addr)
844 {
845         int mask;
846         int ret;
847 
848         addr += (nr >> 3);
849         mask = 1 << (7 - (nr & 0x07));
850         ret = mask & *addr;
851         *addr |= mask;
852         return ret;
853 }
854 
855 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
856 {
857         int mask;
858         int ret;
859 
860         addr += (nr >> 3);
861         mask = 1 << (7 - (nr & 0x07));
862         ret = mask & *addr;
863         *addr &= ~mask;
864         return ret;
865 }
866 
867 /* used for f2fs_inode_info->flags */
868 enum {
869         FI_NEW_INODE,           /* indicate newly allocated inode */
870         FI_DIRTY_INODE,         /* indicate inode is dirty or not */
871         FI_INC_LINK,            /* need to increment i_nlink */
872         FI_ACL_MODE,            /* indicate acl mode */
873         FI_NO_ALLOC,            /* should not allocate any blocks */
874         FI_UPDATE_DIR,          /* should update inode block for consistency */
875         FI_DELAY_IPUT,          /* used for the recovery */
876 };
877 
878 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
879 {
880         set_bit(flag, &fi->flags);
881 }
882 
883 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
884 {
885         return test_bit(flag, &fi->flags);
886 }
887 
888 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
889 {
890         clear_bit(flag, &fi->flags);
891 }
892 
893 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
894 {
895         fi->i_acl_mode = mode;
896         set_inode_flag(fi, FI_ACL_MODE);
897 }
898 
899 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
900 {
901         if (is_inode_flag_set(fi, FI_ACL_MODE)) {
902                 clear_inode_flag(fi, FI_ACL_MODE);
903                 return 1;
904         }
905         return 0;
906 }
907 
908 static inline int f2fs_readonly(struct super_block *sb)
909 {
910         return sb->s_flags & MS_RDONLY;
911 }
912 
913 /*
914  * file.c
915  */
916 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
917 void truncate_data_blocks(struct dnode_of_data *);
918 void f2fs_truncate(struct inode *);
919 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
920 int f2fs_setattr(struct dentry *, struct iattr *);
921 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
922 int truncate_data_blocks_range(struct dnode_of_data *, int);
923 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
924 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
925 
926 /*
927  * inode.c
928  */
929 void f2fs_set_inode_flags(struct inode *);
930 struct inode *f2fs_iget(struct super_block *, unsigned long);
931 void update_inode(struct inode *, struct page *);
932 int update_inode_page(struct inode *);
933 int f2fs_write_inode(struct inode *, struct writeback_control *);
934 void f2fs_evict_inode(struct inode *);
935 
936 /*
937  * namei.c
938  */
939 struct dentry *f2fs_get_parent(struct dentry *child);
940 
941 /*
942  * dir.c
943  */
944 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
945                                                         struct page **);
946 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
947 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
948 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
949                                 struct page *, struct inode *);
950 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
951 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
952 int f2fs_make_empty(struct inode *, struct inode *);
953 bool f2fs_empty_dir(struct inode *);
954 
955 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
956 {
957         return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
958                                 inode);
959 }
960 
961 /*
962  * super.c
963  */
964 int f2fs_sync_fs(struct super_block *, int);
965 extern __printf(3, 4)
966 void f2fs_msg(struct super_block *, const char *, const char *, ...);
967 
968 /*
969  * hash.c
970  */
971 f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
972 
973 /*
974  * node.c
975  */
976 struct dnode_of_data;
977 struct node_info;
978 
979 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
980 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
981 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
982 int truncate_inode_blocks(struct inode *, pgoff_t);
983 int remove_inode_page(struct inode *);
984 struct page *new_inode_page(struct inode *, const struct qstr *);
985 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
986 void ra_node_page(struct f2fs_sb_info *, nid_t);
987 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
988 struct page *get_node_page_ra(struct page *, int);
989 void sync_inode_page(struct dnode_of_data *);
990 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
991 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
992 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
993 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
994 void recover_node_page(struct f2fs_sb_info *, struct page *,
995                 struct f2fs_summary *, struct node_info *, block_t);
996 int recover_inode_page(struct f2fs_sb_info *, struct page *);
997 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
998                                 struct f2fs_summary_block *);
999 void flush_nat_entries(struct f2fs_sb_info *);
1000 int build_node_manager(struct f2fs_sb_info *);
1001 void destroy_node_manager(struct f2fs_sb_info *);
1002 int __init create_node_manager_caches(void);
1003 void destroy_node_manager_caches(void);
1004 
1005 /*
1006  * segment.c
1007  */
1008 void f2fs_balance_fs(struct f2fs_sb_info *);
1009 void invalidate_blocks(struct f2fs_sb_info *, block_t);
1010 void clear_prefree_segments(struct f2fs_sb_info *);
1011 int npages_for_summary_flush(struct f2fs_sb_info *);
1012 void allocate_new_segments(struct f2fs_sb_info *);
1013 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1014 struct bio *f2fs_bio_alloc(struct block_device *, int);
1015 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
1016 void write_meta_page(struct f2fs_sb_info *, struct page *);
1017 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1018                                         block_t, block_t *);
1019 void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1020                                         block_t, block_t *);
1021 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1022 void recover_data_page(struct f2fs_sb_info *, struct page *,
1023                                 struct f2fs_summary *, block_t, block_t);
1024 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1025                                 struct f2fs_summary *, block_t, block_t);
1026 void write_data_summaries(struct f2fs_sb_info *, block_t);
1027 void write_node_summaries(struct f2fs_sb_info *, block_t);
1028 int lookup_journal_in_cursum(struct f2fs_summary_block *,
1029                                         int, unsigned int, int);
1030 void flush_sit_entries(struct f2fs_sb_info *);
1031 int build_segment_manager(struct f2fs_sb_info *);
1032 void destroy_segment_manager(struct f2fs_sb_info *);
1033 
1034 /*
1035  * checkpoint.c
1036  */
1037 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1038 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1039 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1040 int check_orphan_space(struct f2fs_sb_info *);
1041 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1042 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1043 int recover_orphan_inodes(struct f2fs_sb_info *);
1044 int get_valid_checkpoint(struct f2fs_sb_info *);
1045 void set_dirty_dir_page(struct inode *, struct page *);
1046 void add_dirty_dir_inode(struct inode *);
1047 void remove_dirty_dir_inode(struct inode *);
1048 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
1049 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1050 void write_checkpoint(struct f2fs_sb_info *, bool);
1051 void init_orphan_info(struct f2fs_sb_info *);
1052 int __init create_checkpoint_caches(void);
1053 void destroy_checkpoint_caches(void);
1054 
1055 /*
1056  * data.c
1057  */
1058 int reserve_new_block(struct dnode_of_data *);
1059 void update_extent_cache(block_t, struct dnode_of_data *);
1060 struct page *find_data_page(struct inode *, pgoff_t, bool);
1061 struct page *get_lock_data_page(struct inode *, pgoff_t);
1062 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1063 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
1064 int do_write_data_page(struct page *);
1065 
1066 /*
1067  * gc.c
1068  */
1069 int start_gc_thread(struct f2fs_sb_info *);
1070 void stop_gc_thread(struct f2fs_sb_info *);
1071 block_t start_bidx_of_node(unsigned int);
1072 int f2fs_gc(struct f2fs_sb_info *);
1073 void build_gc_manager(struct f2fs_sb_info *);
1074 int __init create_gc_caches(void);
1075 void destroy_gc_caches(void);
1076 
1077 /*
1078  * recovery.c
1079  */
1080 int recover_fsync_data(struct f2fs_sb_info *);
1081 bool space_for_roll_forward(struct f2fs_sb_info *);
1082 
1083 /*
1084  * debug.c
1085  */
1086 #ifdef CONFIG_F2FS_STAT_FS
1087 struct f2fs_stat_info {
1088         struct list_head stat_list;
1089         struct f2fs_sb_info *sbi;
1090         struct mutex stat_lock;
1091         int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1092         int main_area_segs, main_area_sections, main_area_zones;
1093         int hit_ext, total_ext;
1094         int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1095         int nats, sits, fnids;
1096         int total_count, utilization;
1097         int bg_gc;
1098         unsigned int valid_count, valid_node_count, valid_inode_count;
1099         unsigned int bimodal, avg_vblocks;
1100         int util_free, util_valid, util_invalid;
1101         int rsvd_segs, overp_segs;
1102         int dirty_count, node_pages, meta_pages;
1103         int prefree_count, call_count;
1104         int tot_segs, node_segs, data_segs, free_segs, free_secs;
1105         int tot_blks, data_blks, node_blks;
1106         int curseg[NR_CURSEG_TYPE];
1107         int cursec[NR_CURSEG_TYPE];
1108         int curzone[NR_CURSEG_TYPE];
1109 
1110         unsigned int segment_count[2];
1111         unsigned int block_count[2];
1112         unsigned base_mem, cache_mem;
1113 };
1114 
1115 #define stat_inc_call_count(si) ((si)->call_count++)
1116 
1117 #define stat_inc_seg_count(sbi, type)                                   \
1118         do {                                                            \
1119                 struct f2fs_stat_info *si = sbi->stat_info;             \
1120                 (si)->tot_segs++;                                       \
1121                 if (type == SUM_TYPE_DATA)                              \
1122                         si->data_segs++;                                \
1123                 else                                                    \
1124                         si->node_segs++;                                \
1125         } while (0)
1126 
1127 #define stat_inc_tot_blk_count(si, blks)                                \
1128         (si->tot_blks += (blks))
1129 
1130 #define stat_inc_data_blk_count(sbi, blks)                              \
1131         do {                                                            \
1132                 struct f2fs_stat_info *si = sbi->stat_info;             \
1133                 stat_inc_tot_blk_count(si, blks);                       \
1134                 si->data_blks += (blks);                                \
1135         } while (0)
1136 
1137 #define stat_inc_node_blk_count(sbi, blks)                              \
1138         do {                                                            \
1139                 struct f2fs_stat_info *si = sbi->stat_info;             \
1140                 stat_inc_tot_blk_count(si, blks);                       \
1141                 si->node_blks += (blks);                                \
1142         } while (0)
1143 
1144 int f2fs_build_stats(struct f2fs_sb_info *);
1145 void f2fs_destroy_stats(struct f2fs_sb_info *);
1146 void __init f2fs_create_root_stats(void);
1147 void f2fs_destroy_root_stats(void);
1148 #else
1149 #define stat_inc_call_count(si)
1150 #define stat_inc_seg_count(si, type)
1151 #define stat_inc_tot_blk_count(si, blks)
1152 #define stat_inc_data_blk_count(si, blks)
1153 #define stat_inc_node_blk_count(sbi, blks)
1154 
1155 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1156 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1157 static inline void __init f2fs_create_root_stats(void) { }
1158 static inline void f2fs_destroy_root_stats(void) { }
1159 #endif
1160 
1161 extern const struct file_operations f2fs_dir_operations;
1162 extern const struct file_operations f2fs_file_operations;
1163 extern const struct inode_operations f2fs_file_inode_operations;
1164 extern const struct address_space_operations f2fs_dblock_aops;
1165 extern const struct address_space_operations f2fs_node_aops;
1166 extern const struct address_space_operations f2fs_meta_aops;
1167 extern const struct inode_operations f2fs_dir_inode_operations;
1168 extern const struct inode_operations f2fs_symlink_inode_operations;
1169 extern const struct inode_operations f2fs_special_inode_operations;
1170 #endif
1171 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp