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

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

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ 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-3.16.85 ] ~ [ 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-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 #include <linux/kobject.h>
 21 #include <linux/sched.h>
 22 
 23 #ifdef CONFIG_F2FS_CHECK_FS
 24 #define f2fs_bug_on(condition)  BUG_ON(condition)
 25 #else
 26 #define f2fs_bug_on(condition)
 27 #endif
 28 
 29 /*
 30  * For mount options
 31  */
 32 #define F2FS_MOUNT_BG_GC                0x00000001
 33 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
 34 #define F2FS_MOUNT_DISCARD              0x00000004
 35 #define F2FS_MOUNT_NOHEAP               0x00000008
 36 #define F2FS_MOUNT_XATTR_USER           0x00000010
 37 #define F2FS_MOUNT_POSIX_ACL            0x00000020
 38 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
 39 #define F2FS_MOUNT_INLINE_XATTR         0x00000080
 40 
 41 #define clear_opt(sbi, option)  (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
 42 #define set_opt(sbi, option)    (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
 43 #define test_opt(sbi, option)   (sbi->mount_opt.opt & F2FS_MOUNT_##option)
 44 
 45 #define ver_after(a, b) (typecheck(unsigned long long, a) &&            \
 46                 typecheck(unsigned long long, b) &&                     \
 47                 ((long long)((a) - (b)) > 0))
 48 
 49 typedef u32 block_t;    /*
 50                          * should not change u32, since it is the on-disk block
 51                          * address format, __le32.
 52                          */
 53 typedef u32 nid_t;
 54 
 55 struct f2fs_mount_info {
 56         unsigned int    opt;
 57 };
 58 
 59 #define CRCPOLY_LE 0xedb88320
 60 
 61 static inline __u32 f2fs_crc32(void *buf, size_t len)
 62 {
 63         unsigned char *p = (unsigned char *)buf;
 64         __u32 crc = F2FS_SUPER_MAGIC;
 65         int i;
 66 
 67         while (len--) {
 68                 crc ^= *p++;
 69                 for (i = 0; i < 8; i++)
 70                         crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
 71         }
 72         return crc;
 73 }
 74 
 75 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
 76 {
 77         return f2fs_crc32(buf, buf_size) == blk_crc;
 78 }
 79 
 80 /*
 81  * For checkpoint manager
 82  */
 83 enum {
 84         NAT_BITMAP,
 85         SIT_BITMAP
 86 };
 87 
 88 /* for the list of orphan inodes */
 89 struct orphan_inode_entry {
 90         struct list_head list;  /* list head */
 91         nid_t ino;              /* inode number */
 92 };
 93 
 94 /* for the list of directory inodes */
 95 struct dir_inode_entry {
 96         struct list_head list;  /* list head */
 97         struct inode *inode;    /* vfs inode pointer */
 98 };
 99 
100 /* for the list of fsync inodes, used only during recovery */
101 struct fsync_inode_entry {
102         struct list_head list;  /* list head */
103         struct inode *inode;    /* vfs inode pointer */
104         block_t blkaddr;        /* block address locating the last inode */
105 };
106 
107 #define nats_in_cursum(sum)             (le16_to_cpu(sum->n_nats))
108 #define sits_in_cursum(sum)             (le16_to_cpu(sum->n_sits))
109 
110 #define nat_in_journal(sum, i)          (sum->nat_j.entries[i].ne)
111 #define nid_in_journal(sum, i)          (sum->nat_j.entries[i].nid)
112 #define sit_in_journal(sum, i)          (sum->sit_j.entries[i].se)
113 #define segno_in_journal(sum, i)        (sum->sit_j.entries[i].segno)
114 
115 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
116 {
117         int before = nats_in_cursum(rs);
118         rs->n_nats = cpu_to_le16(before + i);
119         return before;
120 }
121 
122 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
123 {
124         int before = sits_in_cursum(rs);
125         rs->n_sits = cpu_to_le16(before + i);
126         return before;
127 }
128 
129 /*
130  * ioctl commands
131  */
132 #define F2FS_IOC_GETFLAGS               FS_IOC_GETFLAGS
133 #define F2FS_IOC_SETFLAGS               FS_IOC_SETFLAGS
134 
135 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
136 /*
137  * ioctl commands in 32 bit emulation
138  */
139 #define F2FS_IOC32_GETFLAGS             FS_IOC32_GETFLAGS
140 #define F2FS_IOC32_SETFLAGS             FS_IOC32_SETFLAGS
141 #endif
142 
143 /*
144  * For INODE and NODE manager
145  */
146 /*
147  * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
148  * as its node offset to distinguish from index node blocks.
149  * But some bits are used to mark the node block.
150  */
151 #define XATTR_NODE_OFFSET       ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
152                                 >> OFFSET_BIT_SHIFT)
153 enum {
154         ALLOC_NODE,                     /* allocate a new node page if needed */
155         LOOKUP_NODE,                    /* look up a node without readahead */
156         LOOKUP_NODE_RA,                 /*
157                                          * look up a node with readahead called
158                                          * by get_datablock_ro.
159                                          */
160 };
161 
162 #define F2FS_LINK_MAX           32000   /* maximum link count per file */
163 
164 /* for in-memory extent cache entry */
165 struct extent_info {
166         rwlock_t ext_lock;      /* rwlock for consistency */
167         unsigned int fofs;      /* start offset in a file */
168         u32 blk_addr;           /* start block address of the extent */
169         unsigned int len;       /* length of the extent */
170 };
171 
172 /*
173  * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
174  */
175 #define FADVISE_COLD_BIT        0x01
176 #define FADVISE_LOST_PINO_BIT   0x02
177 
178 struct f2fs_inode_info {
179         struct inode vfs_inode;         /* serve a vfs inode */
180         unsigned long i_flags;          /* keep an inode flags for ioctl */
181         unsigned char i_advise;         /* use to give file attribute hints */
182         unsigned int i_current_depth;   /* use only in directory structure */
183         unsigned int i_pino;            /* parent inode number */
184         umode_t i_acl_mode;             /* keep file acl mode temporarily */
185 
186         /* Use below internally in f2fs*/
187         unsigned long flags;            /* use to pass per-file flags */
188         atomic_t dirty_dents;           /* # of dirty dentry pages */
189         f2fs_hash_t chash;              /* hash value of given file name */
190         unsigned int clevel;            /* maximum level of given file name */
191         nid_t i_xattr_nid;              /* node id that contains xattrs */
192         unsigned long long xattr_ver;   /* cp version of xattr modification */
193         struct extent_info ext;         /* in-memory extent cache entry */
194 };
195 
196 static inline void get_extent_info(struct extent_info *ext,
197                                         struct f2fs_extent i_ext)
198 {
199         write_lock(&ext->ext_lock);
200         ext->fofs = le32_to_cpu(i_ext.fofs);
201         ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
202         ext->len = le32_to_cpu(i_ext.len);
203         write_unlock(&ext->ext_lock);
204 }
205 
206 static inline void set_raw_extent(struct extent_info *ext,
207                                         struct f2fs_extent *i_ext)
208 {
209         read_lock(&ext->ext_lock);
210         i_ext->fofs = cpu_to_le32(ext->fofs);
211         i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
212         i_ext->len = cpu_to_le32(ext->len);
213         read_unlock(&ext->ext_lock);
214 }
215 
216 struct f2fs_nm_info {
217         block_t nat_blkaddr;            /* base disk address of NAT */
218         nid_t max_nid;                  /* maximum possible node ids */
219         nid_t next_scan_nid;            /* the next nid to be scanned */
220 
221         /* NAT cache management */
222         struct radix_tree_root nat_root;/* root of the nat entry cache */
223         rwlock_t nat_tree_lock;         /* protect nat_tree_lock */
224         unsigned int nat_cnt;           /* the # of cached nat entries */
225         struct list_head nat_entries;   /* cached nat entry list (clean) */
226         struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
227 
228         /* free node ids management */
229         struct list_head free_nid_list; /* a list for free nids */
230         spinlock_t free_nid_list_lock;  /* protect free nid list */
231         unsigned int fcnt;              /* the number of free node id */
232         struct mutex build_lock;        /* lock for build free nids */
233 
234         /* for checkpoint */
235         char *nat_bitmap;               /* NAT bitmap pointer */
236         int bitmap_size;                /* bitmap size */
237 };
238 
239 /*
240  * this structure is used as one of function parameters.
241  * all the information are dedicated to a given direct node block determined
242  * by the data offset in a file.
243  */
244 struct dnode_of_data {
245         struct inode *inode;            /* vfs inode pointer */
246         struct page *inode_page;        /* its inode page, NULL is possible */
247         struct page *node_page;         /* cached direct node page */
248         nid_t nid;                      /* node id of the direct node block */
249         unsigned int ofs_in_node;       /* data offset in the node page */
250         bool inode_page_locked;         /* inode page is locked or not */
251         block_t data_blkaddr;           /* block address of the node block */
252 };
253 
254 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
255                 struct page *ipage, struct page *npage, nid_t nid)
256 {
257         memset(dn, 0, sizeof(*dn));
258         dn->inode = inode;
259         dn->inode_page = ipage;
260         dn->node_page = npage;
261         dn->nid = nid;
262 }
263 
264 /*
265  * For SIT manager
266  *
267  * By default, there are 6 active log areas across the whole main area.
268  * When considering hot and cold data separation to reduce cleaning overhead,
269  * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
270  * respectively.
271  * In the current design, you should not change the numbers intentionally.
272  * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
273  * logs individually according to the underlying devices. (default: 6)
274  * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
275  * data and 8 for node logs.
276  */
277 #define NR_CURSEG_DATA_TYPE     (3)
278 #define NR_CURSEG_NODE_TYPE     (3)
279 #define NR_CURSEG_TYPE  (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
280 
281 enum {
282         CURSEG_HOT_DATA = 0,    /* directory entry blocks */
283         CURSEG_WARM_DATA,       /* data blocks */
284         CURSEG_COLD_DATA,       /* multimedia or GCed data blocks */
285         CURSEG_HOT_NODE,        /* direct node blocks of directory files */
286         CURSEG_WARM_NODE,       /* direct node blocks of normal files */
287         CURSEG_COLD_NODE,       /* indirect node blocks */
288         NO_CHECK_TYPE
289 };
290 
291 struct f2fs_sm_info {
292         struct sit_info *sit_info;              /* whole segment information */
293         struct free_segmap_info *free_info;     /* free segment information */
294         struct dirty_seglist_info *dirty_info;  /* dirty segment information */
295         struct curseg_info *curseg_array;       /* active segment information */
296 
297         struct list_head wblist_head;   /* list of under-writeback pages */
298         spinlock_t wblist_lock;         /* lock for checkpoint */
299 
300         block_t seg0_blkaddr;           /* block address of 0'th segment */
301         block_t main_blkaddr;           /* start block address of main area */
302         block_t ssa_blkaddr;            /* start block address of SSA area */
303 
304         unsigned int segment_count;     /* total # of segments */
305         unsigned int main_segments;     /* # of segments in main area */
306         unsigned int reserved_segments; /* # of reserved segments */
307         unsigned int ovp_segments;      /* # of overprovision segments */
308 
309         /* a threshold to reclaim prefree segments */
310         unsigned int rec_prefree_segments;
311 };
312 
313 /*
314  * For superblock
315  */
316 /*
317  * COUNT_TYPE for monitoring
318  *
319  * f2fs monitors the number of several block types such as on-writeback,
320  * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
321  */
322 enum count_type {
323         F2FS_WRITEBACK,
324         F2FS_DIRTY_DENTS,
325         F2FS_DIRTY_NODES,
326         F2FS_DIRTY_META,
327         NR_COUNT_TYPE,
328 };
329 
330 /*
331  * The below are the page types of bios used in submti_bio().
332  * The available types are:
333  * DATA                 User data pages. It operates as async mode.
334  * NODE                 Node pages. It operates as async mode.
335  * META                 FS metadata pages such as SIT, NAT, CP.
336  * NR_PAGE_TYPE         The number of page types.
337  * META_FLUSH           Make sure the previous pages are written
338  *                      with waiting the bio's completion
339  * ...                  Only can be used with META.
340  */
341 enum page_type {
342         DATA,
343         NODE,
344         META,
345         NR_PAGE_TYPE,
346         META_FLUSH,
347 };
348 
349 struct f2fs_sb_info {
350         struct super_block *sb;                 /* pointer to VFS super block */
351         struct proc_dir_entry *s_proc;          /* proc entry */
352         struct buffer_head *raw_super_buf;      /* buffer head of raw sb */
353         struct f2fs_super_block *raw_super;     /* raw super block pointer */
354         int s_dirty;                            /* dirty flag for checkpoint */
355 
356         /* for node-related operations */
357         struct f2fs_nm_info *nm_info;           /* node manager */
358         struct inode *node_inode;               /* cache node blocks */
359 
360         /* for segment-related operations */
361         struct f2fs_sm_info *sm_info;           /* segment manager */
362         struct bio *bio[NR_PAGE_TYPE];          /* bios to merge */
363         sector_t last_block_in_bio[NR_PAGE_TYPE];       /* last block number */
364         struct rw_semaphore bio_sem;            /* IO semaphore */
365 
366         /* for checkpoint */
367         struct f2fs_checkpoint *ckpt;           /* raw checkpoint pointer */
368         struct inode *meta_inode;               /* cache meta blocks */
369         struct mutex cp_mutex;                  /* checkpoint procedure lock */
370         struct rw_semaphore cp_rwsem;           /* blocking FS operations */
371         struct mutex node_write;                /* locking node writes */
372         struct mutex writepages;                /* mutex for writepages() */
373         bool por_doing;                         /* recovery is doing or not */
374         bool on_build_free_nids;                /* build_free_nids is doing */
375         wait_queue_head_t cp_wait;
376 
377         /* for orphan inode management */
378         struct list_head orphan_inode_list;     /* orphan inode list */
379         struct mutex orphan_inode_mutex;        /* for orphan inode list */
380         unsigned int n_orphans;                 /* # of orphan inodes */
381 
382         /* for directory inode management */
383         struct list_head dir_inode_list;        /* dir inode list */
384         spinlock_t dir_inode_lock;              /* for dir inode list lock */
385 
386         /* basic file system units */
387         unsigned int log_sectors_per_block;     /* log2 sectors per block */
388         unsigned int log_blocksize;             /* log2 block size */
389         unsigned int blocksize;                 /* block size */
390         unsigned int root_ino_num;              /* root inode number*/
391         unsigned int node_ino_num;              /* node inode number*/
392         unsigned int meta_ino_num;              /* meta inode number*/
393         unsigned int log_blocks_per_seg;        /* log2 blocks per segment */
394         unsigned int blocks_per_seg;            /* blocks per segment */
395         unsigned int segs_per_sec;              /* segments per section */
396         unsigned int secs_per_zone;             /* sections per zone */
397         unsigned int total_sections;            /* total section count */
398         unsigned int total_node_count;          /* total node block count */
399         unsigned int total_valid_node_count;    /* valid node block count */
400         unsigned int total_valid_inode_count;   /* valid inode count */
401         int active_logs;                        /* # of active logs */
402 
403         block_t user_block_count;               /* # of user blocks */
404         block_t total_valid_block_count;        /* # of valid blocks */
405         block_t alloc_valid_block_count;        /* # of allocated blocks */
406         block_t last_valid_block_count;         /* for recovery */
407         u32 s_next_generation;                  /* for NFS support */
408         atomic_t nr_pages[NR_COUNT_TYPE];       /* # of pages, see count_type */
409 
410         struct f2fs_mount_info mount_opt;       /* mount options */
411 
412         /* for cleaning operations */
413         struct mutex gc_mutex;                  /* mutex for GC */
414         struct f2fs_gc_kthread  *gc_thread;     /* GC thread */
415         unsigned int cur_victim_sec;            /* current victim section num */
416 
417         /*
418          * for stat information.
419          * one is for the LFS mode, and the other is for the SSR mode.
420          */
421 #ifdef CONFIG_F2FS_STAT_FS
422         struct f2fs_stat_info *stat_info;       /* FS status information */
423         unsigned int segment_count[2];          /* # of allocated segments */
424         unsigned int block_count[2];            /* # of allocated blocks */
425         int total_hit_ext, read_hit_ext;        /* extent cache hit ratio */
426         int bg_gc;                              /* background gc calls */
427         unsigned int n_dirty_dirs;              /* # of dir inodes */
428 #endif
429         unsigned int last_victim[2];            /* last victim segment # */
430         spinlock_t stat_lock;                   /* lock for stat operations */
431 
432         /* For sysfs suppport */
433         struct kobject s_kobj;
434         struct completion s_kobj_unregister;
435 };
436 
437 /*
438  * Inline functions
439  */
440 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
441 {
442         return container_of(inode, struct f2fs_inode_info, vfs_inode);
443 }
444 
445 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
446 {
447         return sb->s_fs_info;
448 }
449 
450 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
451 {
452         return (struct f2fs_super_block *)(sbi->raw_super);
453 }
454 
455 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
456 {
457         return (struct f2fs_checkpoint *)(sbi->ckpt);
458 }
459 
460 static inline struct f2fs_node *F2FS_NODE(struct page *page)
461 {
462         return (struct f2fs_node *)page_address(page);
463 }
464 
465 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
466 {
467         return (struct f2fs_nm_info *)(sbi->nm_info);
468 }
469 
470 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
471 {
472         return (struct f2fs_sm_info *)(sbi->sm_info);
473 }
474 
475 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
476 {
477         return (struct sit_info *)(SM_I(sbi)->sit_info);
478 }
479 
480 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
481 {
482         return (struct free_segmap_info *)(SM_I(sbi)->free_info);
483 }
484 
485 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
486 {
487         return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
488 }
489 
490 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
491 {
492         sbi->s_dirty = 1;
493 }
494 
495 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
496 {
497         sbi->s_dirty = 0;
498 }
499 
500 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
501 {
502         return le64_to_cpu(cp->checkpoint_ver);
503 }
504 
505 static 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 
511 static 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 
518 static 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 
525 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
526 {
527         down_read(&sbi->cp_rwsem);
528 }
529 
530 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
531 {
532         up_read(&sbi->cp_rwsem);
533 }
534 
535 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
536 {
537         down_write_nest_lock(&sbi->cp_rwsem, &sbi->cp_mutex);
538 }
539 
540 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
541 {
542         up_write(&sbi->cp_rwsem);
543 }
544 
545 /*
546  * Check whether the given nid is within node id range.
547  */
548 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
549 {
550         WARN_ON((nid >= NM_I(sbi)->max_nid));
551         if (nid >= NM_I(sbi)->max_nid)
552                 return -EINVAL;
553         return 0;
554 }
555 
556 #define F2FS_DEFAULT_ALLOCATED_BLOCKS   1
557 
558 /*
559  * Check whether the inode has blocks or not
560  */
561 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
562 {
563         if (F2FS_I(inode)->i_xattr_nid)
564                 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
565         else
566                 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
567 }
568 
569 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
570                                  struct inode *inode, blkcnt_t count)
571 {
572         block_t valid_block_count;
573 
574         spin_lock(&sbi->stat_lock);
575         valid_block_count =
576                 sbi->total_valid_block_count + (block_t)count;
577         if (valid_block_count > sbi->user_block_count) {
578                 spin_unlock(&sbi->stat_lock);
579                 return false;
580         }
581         inode->i_blocks += count;
582         sbi->total_valid_block_count = valid_block_count;
583         sbi->alloc_valid_block_count += (block_t)count;
584         spin_unlock(&sbi->stat_lock);
585         return true;
586 }
587 
588 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
589                                                 struct inode *inode,
590                                                 blkcnt_t count)
591 {
592         spin_lock(&sbi->stat_lock);
593         f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
594         f2fs_bug_on(inode->i_blocks < count);
595         inode->i_blocks -= count;
596         sbi->total_valid_block_count -= (block_t)count;
597         spin_unlock(&sbi->stat_lock);
598         return 0;
599 }
600 
601 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
602 {
603         atomic_inc(&sbi->nr_pages[count_type]);
604         F2FS_SET_SB_DIRT(sbi);
605 }
606 
607 static inline void inode_inc_dirty_dents(struct inode *inode)
608 {
609         atomic_inc(&F2FS_I(inode)->dirty_dents);
610 }
611 
612 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
613 {
614         atomic_dec(&sbi->nr_pages[count_type]);
615 }
616 
617 static inline void inode_dec_dirty_dents(struct inode *inode)
618 {
619         atomic_dec(&F2FS_I(inode)->dirty_dents);
620 }
621 
622 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
623 {
624         return atomic_read(&sbi->nr_pages[count_type]);
625 }
626 
627 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
628 {
629         unsigned int pages_per_sec = sbi->segs_per_sec *
630                                         (1 << sbi->log_blocks_per_seg);
631         return ((get_pages(sbi, block_type) + pages_per_sec - 1)
632                         >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
633 }
634 
635 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
636 {
637         block_t ret;
638         spin_lock(&sbi->stat_lock);
639         ret = sbi->total_valid_block_count;
640         spin_unlock(&sbi->stat_lock);
641         return ret;
642 }
643 
644 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
645 {
646         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
647 
648         /* return NAT or SIT bitmap */
649         if (flag == NAT_BITMAP)
650                 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
651         else if (flag == SIT_BITMAP)
652                 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
653 
654         return 0;
655 }
656 
657 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
658 {
659         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
660         int offset = (flag == NAT_BITMAP) ?
661                         le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
662         return &ckpt->sit_nat_version_bitmap + offset;
663 }
664 
665 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
666 {
667         block_t start_addr;
668         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
669         unsigned long long ckpt_version = cur_cp_version(ckpt);
670 
671         start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
672 
673         /*
674          * odd numbered checkpoint should at cp segment 0
675          * and even segent must be at cp segment 1
676          */
677         if (!(ckpt_version & 1))
678                 start_addr += sbi->blocks_per_seg;
679 
680         return start_addr;
681 }
682 
683 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
684 {
685         return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
686 }
687 
688 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
689                                                 struct inode *inode,
690                                                 unsigned int count)
691 {
692         block_t valid_block_count;
693         unsigned int valid_node_count;
694 
695         spin_lock(&sbi->stat_lock);
696 
697         valid_block_count = sbi->total_valid_block_count + (block_t)count;
698         sbi->alloc_valid_block_count += (block_t)count;
699         valid_node_count = sbi->total_valid_node_count + count;
700 
701         if (valid_block_count > sbi->user_block_count) {
702                 spin_unlock(&sbi->stat_lock);
703                 return false;
704         }
705 
706         if (valid_node_count > sbi->total_node_count) {
707                 spin_unlock(&sbi->stat_lock);
708                 return false;
709         }
710 
711         if (inode)
712                 inode->i_blocks += count;
713         sbi->total_valid_node_count = valid_node_count;
714         sbi->total_valid_block_count = valid_block_count;
715         spin_unlock(&sbi->stat_lock);
716 
717         return true;
718 }
719 
720 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
721                                                 struct inode *inode,
722                                                 unsigned int count)
723 {
724         spin_lock(&sbi->stat_lock);
725 
726         f2fs_bug_on(sbi->total_valid_block_count < count);
727         f2fs_bug_on(sbi->total_valid_node_count < count);
728         f2fs_bug_on(inode->i_blocks < count);
729 
730         inode->i_blocks -= count;
731         sbi->total_valid_node_count -= count;
732         sbi->total_valid_block_count -= (block_t)count;
733 
734         spin_unlock(&sbi->stat_lock);
735 }
736 
737 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
738 {
739         unsigned int ret;
740         spin_lock(&sbi->stat_lock);
741         ret = sbi->total_valid_node_count;
742         spin_unlock(&sbi->stat_lock);
743         return ret;
744 }
745 
746 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
747 {
748         spin_lock(&sbi->stat_lock);
749         f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
750         sbi->total_valid_inode_count++;
751         spin_unlock(&sbi->stat_lock);
752 }
753 
754 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
755 {
756         spin_lock(&sbi->stat_lock);
757         f2fs_bug_on(!sbi->total_valid_inode_count);
758         sbi->total_valid_inode_count--;
759         spin_unlock(&sbi->stat_lock);
760         return 0;
761 }
762 
763 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
764 {
765         unsigned int ret;
766         spin_lock(&sbi->stat_lock);
767         ret = sbi->total_valid_inode_count;
768         spin_unlock(&sbi->stat_lock);
769         return ret;
770 }
771 
772 static inline void f2fs_put_page(struct page *page, int unlock)
773 {
774         if (!page || IS_ERR(page))
775                 return;
776 
777         if (unlock) {
778                 f2fs_bug_on(!PageLocked(page));
779                 unlock_page(page);
780         }
781         page_cache_release(page);
782 }
783 
784 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
785 {
786         if (dn->node_page)
787                 f2fs_put_page(dn->node_page, 1);
788         if (dn->inode_page && dn->node_page != dn->inode_page)
789                 f2fs_put_page(dn->inode_page, 0);
790         dn->node_page = NULL;
791         dn->inode_page = NULL;
792 }
793 
794 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
795                                         size_t size, void (*ctor)(void *))
796 {
797         return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
798 }
799 
800 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
801                                                 gfp_t flags)
802 {
803         void *entry;
804 retry:
805         entry = kmem_cache_alloc(cachep, flags);
806         if (!entry) {
807                 cond_resched();
808                 goto retry;
809         }
810 
811         return entry;
812 }
813 
814 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
815 
816 static inline bool IS_INODE(struct page *page)
817 {
818         struct f2fs_node *p = F2FS_NODE(page);
819         return RAW_IS_INODE(p);
820 }
821 
822 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
823 {
824         return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
825 }
826 
827 static inline block_t datablock_addr(struct page *node_page,
828                 unsigned int offset)
829 {
830         struct f2fs_node *raw_node;
831         __le32 *addr_array;
832         raw_node = F2FS_NODE(node_page);
833         addr_array = blkaddr_in_node(raw_node);
834         return le32_to_cpu(addr_array[offset]);
835 }
836 
837 static inline int f2fs_test_bit(unsigned int nr, char *addr)
838 {
839         int mask;
840 
841         addr += (nr >> 3);
842         mask = 1 << (7 - (nr & 0x07));
843         return mask & *addr;
844 }
845 
846 static inline int f2fs_set_bit(unsigned int nr, char *addr)
847 {
848         int mask;
849         int ret;
850 
851         addr += (nr >> 3);
852         mask = 1 << (7 - (nr & 0x07));
853         ret = mask & *addr;
854         *addr |= mask;
855         return ret;
856 }
857 
858 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
859 {
860         int mask;
861         int ret;
862 
863         addr += (nr >> 3);
864         mask = 1 << (7 - (nr & 0x07));
865         ret = mask & *addr;
866         *addr &= ~mask;
867         return ret;
868 }
869 
870 /* used for f2fs_inode_info->flags */
871 enum {
872         FI_NEW_INODE,           /* indicate newly allocated inode */
873         FI_DIRTY_INODE,         /* indicate inode is dirty or not */
874         FI_INC_LINK,            /* need to increment i_nlink */
875         FI_ACL_MODE,            /* indicate acl mode */
876         FI_NO_ALLOC,            /* should not allocate any blocks */
877         FI_UPDATE_DIR,          /* should update inode block for consistency */
878         FI_DELAY_IPUT,          /* used for the recovery */
879         FI_INLINE_XATTR,        /* used for inline xattr */
880 };
881 
882 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
883 {
884         set_bit(flag, &fi->flags);
885 }
886 
887 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
888 {
889         return test_bit(flag, &fi->flags);
890 }
891 
892 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
893 {
894         clear_bit(flag, &fi->flags);
895 }
896 
897 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
898 {
899         fi->i_acl_mode = mode;
900         set_inode_flag(fi, FI_ACL_MODE);
901 }
902 
903 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
904 {
905         if (is_inode_flag_set(fi, FI_ACL_MODE)) {
906                 clear_inode_flag(fi, FI_ACL_MODE);
907                 return 1;
908         }
909         return 0;
910 }
911 
912 static inline void get_inline_info(struct f2fs_inode_info *fi,
913                                         struct f2fs_inode *ri)
914 {
915         if (ri->i_inline & F2FS_INLINE_XATTR)
916                 set_inode_flag(fi, FI_INLINE_XATTR);
917 }
918 
919 static inline void set_raw_inline(struct f2fs_inode_info *fi,
920                                         struct f2fs_inode *ri)
921 {
922         ri->i_inline = 0;
923 
924         if (is_inode_flag_set(fi, FI_INLINE_XATTR))
925                 ri->i_inline |= F2FS_INLINE_XATTR;
926 }
927 
928 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
929 {
930         if (is_inode_flag_set(fi, FI_INLINE_XATTR))
931                 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
932         return DEF_ADDRS_PER_INODE;
933 }
934 
935 static inline void *inline_xattr_addr(struct page *page)
936 {
937         struct f2fs_inode *ri;
938         ri = (struct f2fs_inode *)page_address(page);
939         return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
940                                         F2FS_INLINE_XATTR_ADDRS]);
941 }
942 
943 static inline int inline_xattr_size(struct inode *inode)
944 {
945         if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
946                 return F2FS_INLINE_XATTR_ADDRS << 2;
947         else
948                 return 0;
949 }
950 
951 static inline int f2fs_readonly(struct super_block *sb)
952 {
953         return sb->s_flags & MS_RDONLY;
954 }
955 
956 /*
957  * file.c
958  */
959 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
960 void truncate_data_blocks(struct dnode_of_data *);
961 void f2fs_truncate(struct inode *);
962 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
963 int f2fs_setattr(struct dentry *, struct iattr *);
964 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
965 int truncate_data_blocks_range(struct dnode_of_data *, int);
966 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
967 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
968 
969 /*
970  * inode.c
971  */
972 void f2fs_set_inode_flags(struct inode *);
973 struct inode *f2fs_iget(struct super_block *, unsigned long);
974 int try_to_free_nats(struct f2fs_sb_info *, int);
975 void update_inode(struct inode *, struct page *);
976 int update_inode_page(struct inode *);
977 int f2fs_write_inode(struct inode *, struct writeback_control *);
978 void f2fs_evict_inode(struct inode *);
979 
980 /*
981  * namei.c
982  */
983 struct dentry *f2fs_get_parent(struct dentry *child);
984 
985 /*
986  * dir.c
987  */
988 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
989                                                         struct page **);
990 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
991 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
992 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
993                                 struct page *, struct inode *);
994 int update_dent_inode(struct inode *, const struct qstr *);
995 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
996 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
997 int f2fs_make_empty(struct inode *, struct inode *);
998 bool f2fs_empty_dir(struct inode *);
999 
1000 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1001 {
1002         return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1003                                 inode);
1004 }
1005 
1006 /*
1007  * super.c
1008  */
1009 int f2fs_sync_fs(struct super_block *, int);
1010 extern __printf(3, 4)
1011 void f2fs_msg(struct super_block *, const char *, const char *, ...);
1012 
1013 /*
1014  * hash.c
1015  */
1016 f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
1017 
1018 /*
1019  * node.c
1020  */
1021 struct dnode_of_data;
1022 struct node_info;
1023 
1024 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1025 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1026 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1027 int truncate_inode_blocks(struct inode *, pgoff_t);
1028 int truncate_xattr_node(struct inode *, struct page *);
1029 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1030 int remove_inode_page(struct inode *);
1031 struct page *new_inode_page(struct inode *, const struct qstr *);
1032 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1033 void ra_node_page(struct f2fs_sb_info *, nid_t);
1034 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1035 struct page *get_node_page_ra(struct page *, int);
1036 void sync_inode_page(struct dnode_of_data *);
1037 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1038 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1039 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1040 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1041 void recover_node_page(struct f2fs_sb_info *, struct page *,
1042                 struct f2fs_summary *, struct node_info *, block_t);
1043 int recover_inode_page(struct f2fs_sb_info *, struct page *);
1044 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1045                                 struct f2fs_summary_block *);
1046 void flush_nat_entries(struct f2fs_sb_info *);
1047 int build_node_manager(struct f2fs_sb_info *);
1048 void destroy_node_manager(struct f2fs_sb_info *);
1049 int __init create_node_manager_caches(void);
1050 void destroy_node_manager_caches(void);
1051 
1052 /*
1053  * segment.c
1054  */
1055 void f2fs_balance_fs(struct f2fs_sb_info *);
1056 void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1057 void invalidate_blocks(struct f2fs_sb_info *, block_t);
1058 void clear_prefree_segments(struct f2fs_sb_info *);
1059 int npages_for_summary_flush(struct f2fs_sb_info *);
1060 void allocate_new_segments(struct f2fs_sb_info *);
1061 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1062 struct bio *f2fs_bio_alloc(struct block_device *, int);
1063 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool);
1064 void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
1065 void write_meta_page(struct f2fs_sb_info *, struct page *);
1066 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1067                                         block_t, block_t *);
1068 void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1069                                         block_t, block_t *);
1070 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1071 void recover_data_page(struct f2fs_sb_info *, struct page *,
1072                                 struct f2fs_summary *, block_t, block_t);
1073 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1074                                 struct f2fs_summary *, block_t, block_t);
1075 void write_data_summaries(struct f2fs_sb_info *, block_t);
1076 void write_node_summaries(struct f2fs_sb_info *, block_t);
1077 int lookup_journal_in_cursum(struct f2fs_summary_block *,
1078                                         int, unsigned int, int);
1079 void flush_sit_entries(struct f2fs_sb_info *);
1080 int build_segment_manager(struct f2fs_sb_info *);
1081 void destroy_segment_manager(struct f2fs_sb_info *);
1082 
1083 /*
1084  * checkpoint.c
1085  */
1086 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1087 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1088 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1089 int acquire_orphan_inode(struct f2fs_sb_info *);
1090 void release_orphan_inode(struct f2fs_sb_info *);
1091 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1092 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1093 int recover_orphan_inodes(struct f2fs_sb_info *);
1094 int get_valid_checkpoint(struct f2fs_sb_info *);
1095 void set_dirty_dir_page(struct inode *, struct page *);
1096 void add_dirty_dir_inode(struct inode *);
1097 void remove_dirty_dir_inode(struct inode *);
1098 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
1099 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1100 void write_checkpoint(struct f2fs_sb_info *, bool);
1101 void init_orphan_info(struct f2fs_sb_info *);
1102 int __init create_checkpoint_caches(void);
1103 void destroy_checkpoint_caches(void);
1104 
1105 /*
1106  * data.c
1107  */
1108 int reserve_new_block(struct dnode_of_data *);
1109 void update_extent_cache(block_t, struct dnode_of_data *);
1110 struct page *find_data_page(struct inode *, pgoff_t, bool);
1111 struct page *get_lock_data_page(struct inode *, pgoff_t);
1112 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1113 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
1114 int do_write_data_page(struct page *);
1115 
1116 /*
1117  * gc.c
1118  */
1119 int start_gc_thread(struct f2fs_sb_info *);
1120 void stop_gc_thread(struct f2fs_sb_info *);
1121 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
1122 int f2fs_gc(struct f2fs_sb_info *);
1123 void build_gc_manager(struct f2fs_sb_info *);
1124 int __init create_gc_caches(void);
1125 void destroy_gc_caches(void);
1126 
1127 /*
1128  * recovery.c
1129  */
1130 int recover_fsync_data(struct f2fs_sb_info *);
1131 bool space_for_roll_forward(struct f2fs_sb_info *);
1132 
1133 /*
1134  * debug.c
1135  */
1136 #ifdef CONFIG_F2FS_STAT_FS
1137 struct f2fs_stat_info {
1138         struct list_head stat_list;
1139         struct f2fs_sb_info *sbi;
1140         struct mutex stat_lock;
1141         int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1142         int main_area_segs, main_area_sections, main_area_zones;
1143         int hit_ext, total_ext;
1144         int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1145         int nats, sits, fnids;
1146         int total_count, utilization;
1147         int bg_gc;
1148         unsigned int valid_count, valid_node_count, valid_inode_count;
1149         unsigned int bimodal, avg_vblocks;
1150         int util_free, util_valid, util_invalid;
1151         int rsvd_segs, overp_segs;
1152         int dirty_count, node_pages, meta_pages;
1153         int prefree_count, call_count;
1154         int tot_segs, node_segs, data_segs, free_segs, free_secs;
1155         int tot_blks, data_blks, node_blks;
1156         int curseg[NR_CURSEG_TYPE];
1157         int cursec[NR_CURSEG_TYPE];
1158         int curzone[NR_CURSEG_TYPE];
1159 
1160         unsigned int segment_count[2];
1161         unsigned int block_count[2];
1162         unsigned base_mem, cache_mem;
1163 };
1164 
1165 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1166 {
1167         return (struct f2fs_stat_info*)sbi->stat_info;
1168 }
1169 
1170 #define stat_inc_call_count(si)         ((si)->call_count++)
1171 #define stat_inc_bggc_count(sbi)        ((sbi)->bg_gc++)
1172 #define stat_inc_dirty_dir(sbi)         ((sbi)->n_dirty_dirs++)
1173 #define stat_dec_dirty_dir(sbi)         ((sbi)->n_dirty_dirs--)
1174 #define stat_inc_total_hit(sb)          ((F2FS_SB(sb))->total_hit_ext++)
1175 #define stat_inc_read_hit(sb)           ((F2FS_SB(sb))->read_hit_ext++)
1176 #define stat_inc_seg_type(sbi, curseg)                                  \
1177                 ((sbi)->segment_count[(curseg)->alloc_type]++)
1178 #define stat_inc_block_count(sbi, curseg)                               \
1179                 ((sbi)->block_count[(curseg)->alloc_type]++)
1180 
1181 #define stat_inc_seg_count(sbi, type)                                   \
1182         do {                                                            \
1183                 struct f2fs_stat_info *si = F2FS_STAT(sbi);             \
1184                 (si)->tot_segs++;                                       \
1185                 if (type == SUM_TYPE_DATA)                              \
1186                         si->data_segs++;                                \
1187                 else                                                    \
1188                         si->node_segs++;                                \
1189         } while (0)
1190 
1191 #define stat_inc_tot_blk_count(si, blks)                                \
1192         (si->tot_blks += (blks))
1193 
1194 #define stat_inc_data_blk_count(sbi, blks)                              \
1195         do {                                                            \
1196                 struct f2fs_stat_info *si = F2FS_STAT(sbi);             \
1197                 stat_inc_tot_blk_count(si, blks);                       \
1198                 si->data_blks += (blks);                                \
1199         } while (0)
1200 
1201 #define stat_inc_node_blk_count(sbi, blks)                              \
1202         do {                                                            \
1203                 struct f2fs_stat_info *si = F2FS_STAT(sbi);             \
1204                 stat_inc_tot_blk_count(si, blks);                       \
1205                 si->node_blks += (blks);                                \
1206         } while (0)
1207 
1208 int f2fs_build_stats(struct f2fs_sb_info *);
1209 void f2fs_destroy_stats(struct f2fs_sb_info *);
1210 void __init f2fs_create_root_stats(void);
1211 void f2fs_destroy_root_stats(void);
1212 #else
1213 #define stat_inc_call_count(si)
1214 #define stat_inc_bggc_count(si)
1215 #define stat_inc_dirty_dir(sbi)
1216 #define stat_dec_dirty_dir(sbi)
1217 #define stat_inc_total_hit(sb)
1218 #define stat_inc_read_hit(sb)
1219 #define stat_inc_seg_type(sbi, curseg)
1220 #define stat_inc_block_count(sbi, curseg)
1221 #define stat_inc_seg_count(si, type)
1222 #define stat_inc_tot_blk_count(si, blks)
1223 #define stat_inc_data_blk_count(si, blks)
1224 #define stat_inc_node_blk_count(sbi, blks)
1225 
1226 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1227 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1228 static inline void __init f2fs_create_root_stats(void) { }
1229 static inline void f2fs_destroy_root_stats(void) { }
1230 #endif
1231 
1232 extern const struct file_operations f2fs_dir_operations;
1233 extern const struct file_operations f2fs_file_operations;
1234 extern const struct inode_operations f2fs_file_inode_operations;
1235 extern const struct address_space_operations f2fs_dblock_aops;
1236 extern const struct address_space_operations f2fs_node_aops;
1237 extern const struct address_space_operations f2fs_meta_aops;
1238 extern const struct inode_operations f2fs_dir_inode_operations;
1239 extern const struct inode_operations f2fs_symlink_inode_operations;
1240 extern const struct inode_operations f2fs_special_inode_operations;
1241 #endif
1242 

~ [ 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