4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
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>
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
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)
36 #define ver_after(a, b) (typecheck(unsigned long long, a) && \
37 typecheck(unsigned long long, b) && \
38 ((long long)((a) - (b)) > 0))
43 struct f2fs_mount_info
{
47 static inline __u32
f2fs_crc32(void *buff
, size_t len
)
49 return crc32_le(F2FS_SUPER_MAGIC
, buff
, len
);
52 static inline bool f2fs_crc_valid(__u32 blk_crc
, void *buff
, size_t buff_size
)
54 return f2fs_crc32(buff
, buff_size
) == blk_crc
;
58 * For checkpoint manager
65 /* for the list of orphan inodes */
66 struct orphan_inode_entry
{
67 struct list_head list
; /* list head */
68 nid_t ino
; /* inode number */
71 /* for the list of directory inodes */
72 struct dir_inode_entry
{
73 struct list_head list
; /* list head */
74 struct inode
*inode
; /* vfs inode pointer */
77 /* for the list of fsync inodes, used only during recovery */
78 struct fsync_inode_entry
{
79 struct list_head list
; /* list head */
80 struct inode
*inode
; /* vfs inode pointer */
81 block_t blkaddr
; /* block address locating the last inode */
84 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
85 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
87 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
88 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
89 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
90 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
92 static inline int update_nats_in_cursum(struct f2fs_summary_block
*rs
, int i
)
94 int before
= nats_in_cursum(rs
);
95 rs
->n_nats
= cpu_to_le16(before
+ i
);
99 static inline int update_sits_in_cursum(struct f2fs_summary_block
*rs
, int i
)
101 int before
= sits_in_cursum(rs
);
102 rs
->n_sits
= cpu_to_le16(before
+ i
);
107 * For INODE and NODE manager
109 #define XATTR_NODE_OFFSET (-1) /*
110 * store xattrs to one node block per
111 * file keeping -1 as its node offset to
112 * distinguish from index node blocks.
114 #define RDONLY_NODE 1 /*
115 * specify a read-only mode when getting
116 * a node block. 0 is read-write mode.
117 * used by get_dnode_of_data().
119 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
121 /* for in-memory extent cache entry */
123 rwlock_t ext_lock
; /* rwlock for consistency */
124 unsigned int fofs
; /* start offset in a file */
125 u32 blk_addr
; /* start block address of the extent */
126 unsigned int len
; /* lenth of the extent */
130 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
132 #define FADVISE_COLD_BIT 0x01
134 struct f2fs_inode_info
{
135 struct inode vfs_inode
; /* serve a vfs inode */
136 unsigned long i_flags
; /* keep an inode flags for ioctl */
137 unsigned char i_advise
; /* use to give file attribute hints */
138 unsigned int i_current_depth
; /* use only in directory structure */
139 umode_t i_acl_mode
; /* keep file acl mode temporarily */
141 /* Use below internally in f2fs*/
142 unsigned long flags
; /* use to pass per-file flags */
143 unsigned long long data_version
;/* lastes version of data for fsync */
144 atomic_t dirty_dents
; /* # of dirty dentry pages */
145 f2fs_hash_t chash
; /* hash value of given file name */
146 unsigned int clevel
; /* maximum level of given file name */
147 nid_t i_xattr_nid
; /* node id that contains xattrs */
148 struct extent_info ext
; /* in-memory extent cache entry */
151 static inline void get_extent_info(struct extent_info
*ext
,
152 struct f2fs_extent i_ext
)
154 write_lock(&ext
->ext_lock
);
155 ext
->fofs
= le32_to_cpu(i_ext
.fofs
);
156 ext
->blk_addr
= le32_to_cpu(i_ext
.blk_addr
);
157 ext
->len
= le32_to_cpu(i_ext
.len
);
158 write_unlock(&ext
->ext_lock
);
161 static inline void set_raw_extent(struct extent_info
*ext
,
162 struct f2fs_extent
*i_ext
)
164 read_lock(&ext
->ext_lock
);
165 i_ext
->fofs
= cpu_to_le32(ext
->fofs
);
166 i_ext
->blk_addr
= cpu_to_le32(ext
->blk_addr
);
167 i_ext
->len
= cpu_to_le32(ext
->len
);
168 read_unlock(&ext
->ext_lock
);
171 struct f2fs_nm_info
{
172 block_t nat_blkaddr
; /* base disk address of NAT */
173 nid_t max_nid
; /* maximum possible node ids */
174 nid_t init_scan_nid
; /* the first nid to be scanned */
175 nid_t next_scan_nid
; /* the next nid to be scanned */
177 /* NAT cache management */
178 struct radix_tree_root nat_root
;/* root of the nat entry cache */
179 rwlock_t nat_tree_lock
; /* protect nat_tree_lock */
180 unsigned int nat_cnt
; /* the # of cached nat entries */
181 struct list_head nat_entries
; /* cached nat entry list (clean) */
182 struct list_head dirty_nat_entries
; /* cached nat entry list (dirty) */
184 /* free node ids management */
185 struct list_head free_nid_list
; /* a list for free nids */
186 spinlock_t free_nid_list_lock
; /* protect free nid list */
187 unsigned int fcnt
; /* the number of free node id */
188 struct mutex build_lock
; /* lock for build free nids */
191 char *nat_bitmap
; /* NAT bitmap pointer */
192 int bitmap_size
; /* bitmap size */
196 * this structure is used as one of function parameters.
197 * all the information are dedicated to a given direct node block determined
198 * by the data offset in a file.
200 struct dnode_of_data
{
201 struct inode
*inode
; /* vfs inode pointer */
202 struct page
*inode_page
; /* its inode page, NULL is possible */
203 struct page
*node_page
; /* cached direct node page */
204 nid_t nid
; /* node id of the direct node block */
205 unsigned int ofs_in_node
; /* data offset in the node page */
206 bool inode_page_locked
; /* inode page is locked or not */
207 block_t data_blkaddr
; /* block address of the node block */
210 static inline void set_new_dnode(struct dnode_of_data
*dn
, struct inode
*inode
,
211 struct page
*ipage
, struct page
*npage
, nid_t nid
)
214 dn
->inode_page
= ipage
;
215 dn
->node_page
= npage
;
217 dn
->inode_page_locked
= 0;
223 * By default, there are 6 active log areas across the whole main area.
224 * When considering hot and cold data separation to reduce cleaning overhead,
225 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
227 * In the current design, you should not change the numbers intentionally.
228 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
229 * logs individually according to the underlying devices. (default: 6)
230 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
231 * data and 8 for node logs.
233 #define NR_CURSEG_DATA_TYPE (3)
234 #define NR_CURSEG_NODE_TYPE (3)
235 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
238 CURSEG_HOT_DATA
= 0, /* directory entry blocks */
239 CURSEG_WARM_DATA
, /* data blocks */
240 CURSEG_COLD_DATA
, /* multimedia or GCed data blocks */
241 CURSEG_HOT_NODE
, /* direct node blocks of directory files */
242 CURSEG_WARM_NODE
, /* direct node blocks of normal files */
243 CURSEG_COLD_NODE
, /* indirect node blocks */
247 struct f2fs_sm_info
{
248 struct sit_info
*sit_info
; /* whole segment information */
249 struct free_segmap_info
*free_info
; /* free segment information */
250 struct dirty_seglist_info
*dirty_info
; /* dirty segment information */
251 struct curseg_info
*curseg_array
; /* active segment information */
253 struct list_head wblist_head
; /* list of under-writeback pages */
254 spinlock_t wblist_lock
; /* lock for checkpoint */
256 block_t seg0_blkaddr
; /* block address of 0'th segment */
257 block_t main_blkaddr
; /* start block address of main area */
258 block_t ssa_blkaddr
; /* start block address of SSA area */
260 unsigned int segment_count
; /* total # of segments */
261 unsigned int main_segments
; /* # of segments in main area */
262 unsigned int reserved_segments
; /* # of reserved segments */
263 unsigned int ovp_segments
; /* # of overprovision segments */
267 * For directory operation
269 #define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
270 #define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
271 #define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
272 #define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
273 #define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
279 * COUNT_TYPE for monitoring
281 * f2fs monitors the number of several block types such as on-writeback,
282 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
293 * FS_LOCK nesting subclasses for the lock validator:
295 * The locking order between these classes is
296 * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW
297 * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC
300 RENAME
, /* for renaming operations */
301 DENTRY_OPS
, /* for directory operations */
302 DATA_WRITE
, /* for data write */
303 DATA_NEW
, /* for data allocation */
304 DATA_TRUNC
, /* for data truncate */
305 NODE_NEW
, /* for node allocation */
306 NODE_TRUNC
, /* for node truncate */
307 NODE_WRITE
, /* for node write */
312 * The below are the page types of bios used in submti_bio().
313 * The available types are:
314 * DATA User data pages. It operates as async mode.
315 * NODE Node pages. It operates as async mode.
316 * META FS metadata pages such as SIT, NAT, CP.
317 * NR_PAGE_TYPE The number of page types.
318 * META_FLUSH Make sure the previous pages are written
319 * with waiting the bio's completion
320 * ... Only can be used with META.
330 struct f2fs_sb_info
{
331 struct super_block
*sb
; /* pointer to VFS super block */
332 struct buffer_head
*raw_super_buf
; /* buffer head of raw sb */
333 struct f2fs_super_block
*raw_super
; /* raw super block pointer */
334 int s_dirty
; /* dirty flag for checkpoint */
336 /* for node-related operations */
337 struct f2fs_nm_info
*nm_info
; /* node manager */
338 struct inode
*node_inode
; /* cache node blocks */
340 /* for segment-related operations */
341 struct f2fs_sm_info
*sm_info
; /* segment manager */
342 struct bio
*bio
[NR_PAGE_TYPE
]; /* bios to merge */
343 sector_t last_block_in_bio
[NR_PAGE_TYPE
]; /* last block number */
344 struct rw_semaphore bio_sem
; /* IO semaphore */
347 struct f2fs_checkpoint
*ckpt
; /* raw checkpoint pointer */
348 struct inode
*meta_inode
; /* cache meta blocks */
349 struct mutex cp_mutex
; /* for checkpoint procedure */
350 struct mutex fs_lock
[NR_LOCK_TYPE
]; /* for blocking FS operations */
351 struct mutex write_inode
; /* mutex for write inode */
352 struct mutex writepages
; /* mutex for writepages() */
353 int por_doing
; /* recovery is doing or not */
355 /* for orphan inode management */
356 struct list_head orphan_inode_list
; /* orphan inode list */
357 struct mutex orphan_inode_mutex
; /* for orphan inode list */
358 unsigned int n_orphans
; /* # of orphan inodes */
360 /* for directory inode management */
361 struct list_head dir_inode_list
; /* dir inode list */
362 spinlock_t dir_inode_lock
; /* for dir inode list lock */
363 unsigned int n_dirty_dirs
; /* # of dir inodes */
365 /* basic file system units */
366 unsigned int log_sectors_per_block
; /* log2 sectors per block */
367 unsigned int log_blocksize
; /* log2 block size */
368 unsigned int blocksize
; /* block size */
369 unsigned int root_ino_num
; /* root inode number*/
370 unsigned int node_ino_num
; /* node inode number*/
371 unsigned int meta_ino_num
; /* meta inode number*/
372 unsigned int log_blocks_per_seg
; /* log2 blocks per segment */
373 unsigned int blocks_per_seg
; /* blocks per segment */
374 unsigned int segs_per_sec
; /* segments per section */
375 unsigned int secs_per_zone
; /* sections per zone */
376 unsigned int total_sections
; /* total section count */
377 unsigned int total_node_count
; /* total node block count */
378 unsigned int total_valid_node_count
; /* valid node block count */
379 unsigned int total_valid_inode_count
; /* valid inode count */
380 int active_logs
; /* # of active logs */
382 block_t user_block_count
; /* # of user blocks */
383 block_t total_valid_block_count
; /* # of valid blocks */
384 block_t alloc_valid_block_count
; /* # of allocated blocks */
385 block_t last_valid_block_count
; /* for recovery */
386 u32 s_next_generation
; /* for NFS support */
387 atomic_t nr_pages
[NR_COUNT_TYPE
]; /* # of pages, see count_type */
389 struct f2fs_mount_info mount_opt
; /* mount options */
391 /* for cleaning operations */
392 struct mutex gc_mutex
; /* mutex for GC */
393 struct f2fs_gc_kthread
*gc_thread
; /* GC thread */
396 * for stat information.
397 * one is for the LFS mode, and the other is for the SSR mode.
399 struct f2fs_stat_info
*stat_info
; /* FS status information */
400 unsigned int segment_count
[2]; /* # of allocated segments */
401 unsigned int block_count
[2]; /* # of allocated blocks */
402 unsigned int last_victim
[2]; /* last victim segment # */
403 int total_hit_ext
, read_hit_ext
; /* extent cache hit ratio */
404 int bg_gc
; /* background gc calls */
405 spinlock_t stat_lock
; /* lock for stat operations */
411 static inline struct f2fs_inode_info
*F2FS_I(struct inode
*inode
)
413 return container_of(inode
, struct f2fs_inode_info
, vfs_inode
);
416 static inline struct f2fs_sb_info
*F2FS_SB(struct super_block
*sb
)
418 return sb
->s_fs_info
;
421 static inline struct f2fs_super_block
*F2FS_RAW_SUPER(struct f2fs_sb_info
*sbi
)
423 return (struct f2fs_super_block
*)(sbi
->raw_super
);
426 static inline struct f2fs_checkpoint
*F2FS_CKPT(struct f2fs_sb_info
*sbi
)
428 return (struct f2fs_checkpoint
*)(sbi
->ckpt
);
431 static inline struct f2fs_nm_info
*NM_I(struct f2fs_sb_info
*sbi
)
433 return (struct f2fs_nm_info
*)(sbi
->nm_info
);
436 static inline struct f2fs_sm_info
*SM_I(struct f2fs_sb_info
*sbi
)
438 return (struct f2fs_sm_info
*)(sbi
->sm_info
);
441 static inline struct sit_info
*SIT_I(struct f2fs_sb_info
*sbi
)
443 return (struct sit_info
*)(SM_I(sbi
)->sit_info
);
446 static inline struct free_segmap_info
*FREE_I(struct f2fs_sb_info
*sbi
)
448 return (struct free_segmap_info
*)(SM_I(sbi
)->free_info
);
451 static inline struct dirty_seglist_info
*DIRTY_I(struct f2fs_sb_info
*sbi
)
453 return (struct dirty_seglist_info
*)(SM_I(sbi
)->dirty_info
);
456 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info
*sbi
)
461 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info
*sbi
)
466 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
468 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
469 return ckpt_flags
& f
;
472 static inline void set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
474 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
476 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
479 static inline void clear_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
481 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
483 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
486 static inline void mutex_lock_op(struct f2fs_sb_info
*sbi
, enum lock_type t
)
488 mutex_lock_nested(&sbi
->fs_lock
[t
], t
);
491 static inline void mutex_unlock_op(struct f2fs_sb_info
*sbi
, enum lock_type t
)
493 mutex_unlock(&sbi
->fs_lock
[t
]);
497 * Check whether the given nid is within node id range.
499 static inline void check_nid_range(struct f2fs_sb_info
*sbi
, nid_t nid
)
501 BUG_ON((nid
>= NM_I(sbi
)->max_nid
));
504 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
507 * Check whether the inode has blocks or not
509 static inline int F2FS_HAS_BLOCKS(struct inode
*inode
)
511 if (F2FS_I(inode
)->i_xattr_nid
)
512 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
+ 1);
514 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
);
517 static inline bool inc_valid_block_count(struct f2fs_sb_info
*sbi
,
518 struct inode
*inode
, blkcnt_t count
)
520 block_t valid_block_count
;
522 spin_lock(&sbi
->stat_lock
);
524 sbi
->total_valid_block_count
+ (block_t
)count
;
525 if (valid_block_count
> sbi
->user_block_count
) {
526 spin_unlock(&sbi
->stat_lock
);
529 inode
->i_blocks
+= count
;
530 sbi
->total_valid_block_count
= valid_block_count
;
531 sbi
->alloc_valid_block_count
+= (block_t
)count
;
532 spin_unlock(&sbi
->stat_lock
);
536 static inline int dec_valid_block_count(struct f2fs_sb_info
*sbi
,
540 spin_lock(&sbi
->stat_lock
);
541 BUG_ON(sbi
->total_valid_block_count
< (block_t
) count
);
542 BUG_ON(inode
->i_blocks
< count
);
543 inode
->i_blocks
-= count
;
544 sbi
->total_valid_block_count
-= (block_t
)count
;
545 spin_unlock(&sbi
->stat_lock
);
549 static inline void inc_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
551 atomic_inc(&sbi
->nr_pages
[count_type
]);
552 F2FS_SET_SB_DIRT(sbi
);
555 static inline void inode_inc_dirty_dents(struct inode
*inode
)
557 atomic_inc(&F2FS_I(inode
)->dirty_dents
);
560 static inline void dec_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
562 atomic_dec(&sbi
->nr_pages
[count_type
]);
565 static inline void inode_dec_dirty_dents(struct inode
*inode
)
567 atomic_dec(&F2FS_I(inode
)->dirty_dents
);
570 static inline int get_pages(struct f2fs_sb_info
*sbi
, int count_type
)
572 return atomic_read(&sbi
->nr_pages
[count_type
]);
575 static inline block_t
valid_user_blocks(struct f2fs_sb_info
*sbi
)
578 spin_lock(&sbi
->stat_lock
);
579 ret
= sbi
->total_valid_block_count
;
580 spin_unlock(&sbi
->stat_lock
);
584 static inline unsigned long __bitmap_size(struct f2fs_sb_info
*sbi
, int flag
)
586 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
588 /* return NAT or SIT bitmap */
589 if (flag
== NAT_BITMAP
)
590 return le32_to_cpu(ckpt
->nat_ver_bitmap_bytesize
);
591 else if (flag
== SIT_BITMAP
)
592 return le32_to_cpu(ckpt
->sit_ver_bitmap_bytesize
);
597 static inline void *__bitmap_ptr(struct f2fs_sb_info
*sbi
, int flag
)
599 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
600 int offset
= (flag
== NAT_BITMAP
) ?
601 le32_to_cpu(ckpt
->sit_ver_bitmap_bytesize
) : 0;
602 return &ckpt
->sit_nat_version_bitmap
+ offset
;
605 static inline block_t
__start_cp_addr(struct f2fs_sb_info
*sbi
)
608 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
609 unsigned long long ckpt_version
= le64_to_cpu(ckpt
->checkpoint_ver
);
611 start_addr
= le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_blkaddr
);
614 * odd numbered checkpoint should at cp segment 0
615 * and even segent must be at cp segment 1
617 if (!(ckpt_version
& 1))
618 start_addr
+= sbi
->blocks_per_seg
;
623 static inline block_t
__start_sum_addr(struct f2fs_sb_info
*sbi
)
625 return le32_to_cpu(F2FS_CKPT(sbi
)->cp_pack_start_sum
);
628 static inline bool inc_valid_node_count(struct f2fs_sb_info
*sbi
,
632 block_t valid_block_count
;
633 unsigned int valid_node_count
;
635 spin_lock(&sbi
->stat_lock
);
637 valid_block_count
= sbi
->total_valid_block_count
+ (block_t
)count
;
638 sbi
->alloc_valid_block_count
+= (block_t
)count
;
639 valid_node_count
= sbi
->total_valid_node_count
+ count
;
641 if (valid_block_count
> sbi
->user_block_count
) {
642 spin_unlock(&sbi
->stat_lock
);
646 if (valid_node_count
> sbi
->total_node_count
) {
647 spin_unlock(&sbi
->stat_lock
);
652 inode
->i_blocks
+= count
;
653 sbi
->total_valid_node_count
= valid_node_count
;
654 sbi
->total_valid_block_count
= valid_block_count
;
655 spin_unlock(&sbi
->stat_lock
);
660 static inline void dec_valid_node_count(struct f2fs_sb_info
*sbi
,
664 spin_lock(&sbi
->stat_lock
);
666 BUG_ON(sbi
->total_valid_block_count
< count
);
667 BUG_ON(sbi
->total_valid_node_count
< count
);
668 BUG_ON(inode
->i_blocks
< count
);
670 inode
->i_blocks
-= count
;
671 sbi
->total_valid_node_count
-= count
;
672 sbi
->total_valid_block_count
-= (block_t
)count
;
674 spin_unlock(&sbi
->stat_lock
);
677 static inline unsigned int valid_node_count(struct f2fs_sb_info
*sbi
)
680 spin_lock(&sbi
->stat_lock
);
681 ret
= sbi
->total_valid_node_count
;
682 spin_unlock(&sbi
->stat_lock
);
686 static inline void inc_valid_inode_count(struct f2fs_sb_info
*sbi
)
688 spin_lock(&sbi
->stat_lock
);
689 BUG_ON(sbi
->total_valid_inode_count
== sbi
->total_node_count
);
690 sbi
->total_valid_inode_count
++;
691 spin_unlock(&sbi
->stat_lock
);
694 static inline int dec_valid_inode_count(struct f2fs_sb_info
*sbi
)
696 spin_lock(&sbi
->stat_lock
);
697 BUG_ON(!sbi
->total_valid_inode_count
);
698 sbi
->total_valid_inode_count
--;
699 spin_unlock(&sbi
->stat_lock
);
703 static inline unsigned int valid_inode_count(struct f2fs_sb_info
*sbi
)
706 spin_lock(&sbi
->stat_lock
);
707 ret
= sbi
->total_valid_inode_count
;
708 spin_unlock(&sbi
->stat_lock
);
712 static inline void f2fs_put_page(struct page
*page
, int unlock
)
714 if (!page
|| IS_ERR(page
))
718 BUG_ON(!PageLocked(page
));
721 page_cache_release(page
);
724 static inline void f2fs_put_dnode(struct dnode_of_data
*dn
)
727 f2fs_put_page(dn
->node_page
, 1);
728 if (dn
->inode_page
&& dn
->node_page
!= dn
->inode_page
)
729 f2fs_put_page(dn
->inode_page
, 0);
730 dn
->node_page
= NULL
;
731 dn
->inode_page
= NULL
;
734 static inline struct kmem_cache
*f2fs_kmem_cache_create(const char *name
,
735 size_t size
, void (*ctor
)(void *))
737 return kmem_cache_create(name
, size
, 0, SLAB_RECLAIM_ACCOUNT
, ctor
);
740 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
742 static inline bool IS_INODE(struct page
*page
)
744 struct f2fs_node
*p
= (struct f2fs_node
*)page_address(page
);
745 return RAW_IS_INODE(p
);
748 static inline __le32
*blkaddr_in_node(struct f2fs_node
*node
)
750 return RAW_IS_INODE(node
) ? node
->i
.i_addr
: node
->dn
.addr
;
753 static inline block_t
datablock_addr(struct page
*node_page
,
756 struct f2fs_node
*raw_node
;
758 raw_node
= (struct f2fs_node
*)page_address(node_page
);
759 addr_array
= blkaddr_in_node(raw_node
);
760 return le32_to_cpu(addr_array
[offset
]);
763 static inline int f2fs_test_bit(unsigned int nr
, char *addr
)
768 mask
= 1 << (7 - (nr
& 0x07));
772 static inline int f2fs_set_bit(unsigned int nr
, char *addr
)
778 mask
= 1 << (7 - (nr
& 0x07));
784 static inline int f2fs_clear_bit(unsigned int nr
, char *addr
)
790 mask
= 1 << (7 - (nr
& 0x07));
796 /* used for f2fs_inode_info->flags */
798 FI_NEW_INODE
, /* indicate newly allocated inode */
799 FI_NEED_CP
, /* need to do checkpoint during fsync */
800 FI_INC_LINK
, /* need to increment i_nlink */
801 FI_ACL_MODE
, /* indicate acl mode */
802 FI_NO_ALLOC
, /* should not allocate any blocks */
805 static inline void set_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
807 set_bit(flag
, &fi
->flags
);
810 static inline int is_inode_flag_set(struct f2fs_inode_info
*fi
, int flag
)
812 return test_bit(flag
, &fi
->flags
);
815 static inline void clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
817 clear_bit(flag
, &fi
->flags
);
820 static inline void set_acl_inode(struct f2fs_inode_info
*fi
, umode_t mode
)
822 fi
->i_acl_mode
= mode
;
823 set_inode_flag(fi
, FI_ACL_MODE
);
826 static inline int cond_clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
828 if (is_inode_flag_set(fi
, FI_ACL_MODE
)) {
829 clear_inode_flag(fi
, FI_ACL_MODE
);
838 int f2fs_sync_file(struct file
*, loff_t
, loff_t
, int);
839 void truncate_data_blocks(struct dnode_of_data
*);
840 void f2fs_truncate(struct inode
*);
841 int f2fs_setattr(struct dentry
*, struct iattr
*);
842 int truncate_hole(struct inode
*, pgoff_t
, pgoff_t
);
843 long f2fs_ioctl(struct file
*, unsigned int, unsigned long);
848 void f2fs_set_inode_flags(struct inode
*);
849 struct inode
*f2fs_iget_nowait(struct super_block
*, unsigned long);
850 struct inode
*f2fs_iget(struct super_block
*, unsigned long);
851 void update_inode(struct inode
*, struct page
*);
852 int f2fs_write_inode(struct inode
*, struct writeback_control
*);
853 void f2fs_evict_inode(struct inode
*);
858 struct dentry
*f2fs_get_parent(struct dentry
*child
);
863 struct f2fs_dir_entry
*f2fs_find_entry(struct inode
*, struct qstr
*,
865 struct f2fs_dir_entry
*f2fs_parent_dir(struct inode
*, struct page
**);
866 ino_t
f2fs_inode_by_name(struct inode
*, struct qstr
*);
867 void f2fs_set_link(struct inode
*, struct f2fs_dir_entry
*,
868 struct page
*, struct inode
*);
869 void init_dent_inode(struct dentry
*, struct page
*);
870 int f2fs_add_link(struct dentry
*, struct inode
*);
871 void f2fs_delete_entry(struct f2fs_dir_entry
*, struct page
*, struct inode
*);
872 int f2fs_make_empty(struct inode
*, struct inode
*);
873 bool f2fs_empty_dir(struct inode
*);
878 int f2fs_sync_fs(struct super_block
*, int);
883 f2fs_hash_t
f2fs_dentry_hash(const char *, int);
888 struct dnode_of_data
;
891 int is_checkpointed_node(struct f2fs_sb_info
*, nid_t
);
892 void get_node_info(struct f2fs_sb_info
*, nid_t
, struct node_info
*);
893 int get_dnode_of_data(struct dnode_of_data
*, pgoff_t
, int);
894 int truncate_inode_blocks(struct inode
*, pgoff_t
);
895 int remove_inode_page(struct inode
*);
896 int new_inode_page(struct inode
*, struct dentry
*);
897 struct page
*new_node_page(struct dnode_of_data
*, unsigned int);
898 void ra_node_page(struct f2fs_sb_info
*, nid_t
);
899 struct page
*get_node_page(struct f2fs_sb_info
*, pgoff_t
);
900 struct page
*get_node_page_ra(struct page
*, int);
901 void sync_inode_page(struct dnode_of_data
*);
902 int sync_node_pages(struct f2fs_sb_info
*, nid_t
, struct writeback_control
*);
903 bool alloc_nid(struct f2fs_sb_info
*, nid_t
*);
904 void alloc_nid_done(struct f2fs_sb_info
*, nid_t
);
905 void alloc_nid_failed(struct f2fs_sb_info
*, nid_t
);
906 void recover_node_page(struct f2fs_sb_info
*, struct page
*,
907 struct f2fs_summary
*, struct node_info
*, block_t
);
908 int recover_inode_page(struct f2fs_sb_info
*, struct page
*);
909 int restore_node_summary(struct f2fs_sb_info
*, unsigned int,
910 struct f2fs_summary_block
*);
911 void flush_nat_entries(struct f2fs_sb_info
*);
912 int build_node_manager(struct f2fs_sb_info
*);
913 void destroy_node_manager(struct f2fs_sb_info
*);
914 int create_node_manager_caches(void);
915 void destroy_node_manager_caches(void);
920 void f2fs_balance_fs(struct f2fs_sb_info
*);
921 void invalidate_blocks(struct f2fs_sb_info
*, block_t
);
922 void locate_dirty_segment(struct f2fs_sb_info
*, unsigned int);
923 void clear_prefree_segments(struct f2fs_sb_info
*);
924 int npages_for_summary_flush(struct f2fs_sb_info
*);
925 void allocate_new_segments(struct f2fs_sb_info
*);
926 struct page
*get_sum_page(struct f2fs_sb_info
*, unsigned int);
927 struct bio
*f2fs_bio_alloc(struct block_device
*, sector_t
, int, gfp_t
);
928 void f2fs_submit_bio(struct f2fs_sb_info
*, enum page_type
, bool sync
);
929 int write_meta_page(struct f2fs_sb_info
*, struct page
*,
930 struct writeback_control
*);
931 void write_node_page(struct f2fs_sb_info
*, struct page
*, unsigned int,
933 void write_data_page(struct inode
*, struct page
*, struct dnode_of_data
*,
935 void rewrite_data_page(struct f2fs_sb_info
*, struct page
*, block_t
);
936 void recover_data_page(struct f2fs_sb_info
*, struct page
*,
937 struct f2fs_summary
*, block_t
, block_t
);
938 void rewrite_node_page(struct f2fs_sb_info
*, struct page
*,
939 struct f2fs_summary
*, block_t
, block_t
);
940 void write_data_summaries(struct f2fs_sb_info
*, block_t
);
941 void write_node_summaries(struct f2fs_sb_info
*, block_t
);
942 int lookup_journal_in_cursum(struct f2fs_summary_block
*,
943 int, unsigned int, int);
944 void flush_sit_entries(struct f2fs_sb_info
*);
945 int build_segment_manager(struct f2fs_sb_info
*);
946 void reset_victim_segmap(struct f2fs_sb_info
*);
947 void destroy_segment_manager(struct f2fs_sb_info
*);
952 struct page
*grab_meta_page(struct f2fs_sb_info
*, pgoff_t
);
953 struct page
*get_meta_page(struct f2fs_sb_info
*, pgoff_t
);
954 long sync_meta_pages(struct f2fs_sb_info
*, enum page_type
, long);
955 int check_orphan_space(struct f2fs_sb_info
*);
956 void add_orphan_inode(struct f2fs_sb_info
*, nid_t
);
957 void remove_orphan_inode(struct f2fs_sb_info
*, nid_t
);
958 int recover_orphan_inodes(struct f2fs_sb_info
*);
959 int get_valid_checkpoint(struct f2fs_sb_info
*);
960 void set_dirty_dir_page(struct inode
*, struct page
*);
961 void remove_dirty_dir_inode(struct inode
*);
962 void sync_dirty_dir_inodes(struct f2fs_sb_info
*);
963 void block_operations(struct f2fs_sb_info
*);
964 void write_checkpoint(struct f2fs_sb_info
*, bool, bool);
965 void init_orphan_info(struct f2fs_sb_info
*);
966 int create_checkpoint_caches(void);
967 void destroy_checkpoint_caches(void);
972 int reserve_new_block(struct dnode_of_data
*);
973 void update_extent_cache(block_t
, struct dnode_of_data
*);
974 struct page
*find_data_page(struct inode
*, pgoff_t
);
975 struct page
*get_lock_data_page(struct inode
*, pgoff_t
);
976 struct page
*get_new_data_page(struct inode
*, pgoff_t
, bool);
977 int f2fs_readpage(struct f2fs_sb_info
*, struct page
*, block_t
, int);
978 int do_write_data_page(struct page
*);
983 int start_gc_thread(struct f2fs_sb_info
*);
984 void stop_gc_thread(struct f2fs_sb_info
*);
985 block_t
start_bidx_of_node(unsigned int);
986 int f2fs_gc(struct f2fs_sb_info
*, int);
987 void build_gc_manager(struct f2fs_sb_info
*);
988 int create_gc_caches(void);
989 void destroy_gc_caches(void);
994 void recover_fsync_data(struct f2fs_sb_info
*);
995 bool space_for_roll_forward(struct f2fs_sb_info
*);
1000 #ifdef CONFIG_F2FS_STAT_FS
1001 struct f2fs_stat_info
{
1002 struct list_head stat_list
;
1003 struct f2fs_sb_info
*sbi
;
1004 struct mutex stat_lock
;
1005 int all_area_segs
, sit_area_segs
, nat_area_segs
, ssa_area_segs
;
1006 int main_area_segs
, main_area_sections
, main_area_zones
;
1007 int hit_ext
, total_ext
;
1008 int ndirty_node
, ndirty_dent
, ndirty_dirs
, ndirty_meta
;
1009 int nats
, sits
, fnids
;
1010 int total_count
, utilization
;
1012 unsigned int valid_count
, valid_node_count
, valid_inode_count
;
1013 unsigned int bimodal
, avg_vblocks
;
1014 int util_free
, util_valid
, util_invalid
;
1015 int rsvd_segs
, overp_segs
;
1016 int dirty_count
, node_pages
, meta_pages
;
1017 int prefree_count
, call_count
;
1018 int tot_segs
, node_segs
, data_segs
, free_segs
, free_secs
;
1019 int tot_blks
, data_blks
, node_blks
;
1020 int curseg
[NR_CURSEG_TYPE
];
1021 int cursec
[NR_CURSEG_TYPE
];
1022 int curzone
[NR_CURSEG_TYPE
];
1024 unsigned int segment_count
[2];
1025 unsigned int block_count
[2];
1026 unsigned base_mem
, cache_mem
;
1029 #define stat_inc_call_count(si) ((si)->call_count++)
1031 #define stat_inc_seg_count(sbi, type) \
1033 struct f2fs_stat_info *si = sbi->stat_info; \
1035 if (type == SUM_TYPE_DATA) \
1041 #define stat_inc_tot_blk_count(si, blks) \
1042 (si->tot_blks += (blks))
1044 #define stat_inc_data_blk_count(sbi, blks) \
1046 struct f2fs_stat_info *si = sbi->stat_info; \
1047 stat_inc_tot_blk_count(si, blks); \
1048 si->data_blks += (blks); \
1051 #define stat_inc_node_blk_count(sbi, blks) \
1053 struct f2fs_stat_info *si = sbi->stat_info; \
1054 stat_inc_tot_blk_count(si, blks); \
1055 si->node_blks += (blks); \
1058 int f2fs_build_stats(struct f2fs_sb_info
*);
1059 void f2fs_destroy_stats(struct f2fs_sb_info
*);
1060 void destroy_root_stats(void);
1062 #define stat_inc_call_count(si)
1063 #define stat_inc_seg_count(si, type)
1064 #define stat_inc_tot_blk_count(si, blks)
1065 #define stat_inc_data_blk_count(si, blks)
1066 #define stat_inc_node_blk_count(sbi, blks)
1068 static inline int f2fs_build_stats(struct f2fs_sb_info
*sbi
) { return 0; }
1069 static inline void f2fs_destroy_stats(struct f2fs_sb_info
*sbi
) { }
1070 static inline void destroy_root_stats(void) { }
1073 extern const struct file_operations f2fs_dir_operations
;
1074 extern const struct file_operations f2fs_file_operations
;
1075 extern const struct inode_operations f2fs_file_inode_operations
;
1076 extern const struct address_space_operations f2fs_dblock_aops
;
1077 extern const struct address_space_operations f2fs_node_aops
;
1078 extern const struct address_space_operations f2fs_meta_aops
;
1079 extern const struct inode_operations f2fs_dir_inode_operations
;
1080 extern const struct inode_operations f2fs_symlink_inode_operations
;
1081 extern const struct inode_operations f2fs_special_inode_operations
;