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))
40 typedef u32 block_t
; /*
41 * should not change u32, since it is the on-disk block
42 * address format, __le32.
46 struct f2fs_mount_info
{
50 #define CRCPOLY_LE 0xedb88320
52 static inline __u32
f2fs_crc32(void *buf
, size_t len
)
54 unsigned char *p
= (unsigned char *)buf
;
55 __u32 crc
= F2FS_SUPER_MAGIC
;
60 for (i
= 0; i
< 8; i
++)
61 crc
= (crc
>> 1) ^ ((crc
& 1) ? CRCPOLY_LE
: 0);
66 static inline bool f2fs_crc_valid(__u32 blk_crc
, void *buf
, size_t buf_size
)
68 return f2fs_crc32(buf
, buf_size
) == blk_crc
;
72 * For checkpoint manager
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 */
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 */
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 */
98 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
99 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
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)
106 static inline int update_nats_in_cursum(struct f2fs_summary_block
*rs
, int i
)
108 int before
= nats_in_cursum(rs
);
109 rs
->n_nats
= cpu_to_le16(before
+ i
);
113 static inline int update_sits_in_cursum(struct f2fs_summary_block
*rs
, int i
)
115 int before
= sits_in_cursum(rs
);
116 rs
->n_sits
= cpu_to_le16(before
+ i
);
123 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
124 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
126 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
128 * ioctl commands in 32 bit emulation
130 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
131 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
135 * For INODE and NODE manager
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.
143 ALLOC_NODE
, /* allocate a new node page if needed */
144 LOOKUP_NODE
, /* look up a node without readahead */
146 * look up a node with readahead called
147 * by get_datablock_ro.
151 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
153 /* for in-memory extent cache entry */
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 */
162 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
164 #define FADVISE_COLD_BIT 0x01
165 #define FADVISE_LOST_PINO_BIT 0x02
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 */
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 */
184 static inline void get_extent_info(struct extent_info
*ext
,
185 struct f2fs_extent i_ext
)
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
);
194 static inline void set_raw_extent(struct extent_info
*ext
,
195 struct f2fs_extent
*i_ext
)
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
);
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 */
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) */
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 */
223 char *nat_bitmap
; /* NAT bitmap pointer */
224 int bitmap_size
; /* bitmap size */
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.
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 */
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
)
245 memset(dn
, 0, sizeof(*dn
));
247 dn
->inode_page
= ipage
;
248 dn
->node_page
= npage
;
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,
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.
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)
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 */
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 */
285 struct list_head wblist_head
; /* list of under-writeback pages */
286 spinlock_t wblist_lock
; /* lock for checkpoint */
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 */
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 */
299 * For directory operation
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)
311 * COUNT_TYPE for monitoring
313 * f2fs monitors the number of several block types such as on-writeback,
314 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
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.
330 #define NR_GLOBAL_LOCKS 8
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.
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 */
357 /* for node-related operations */
358 struct f2fs_nm_info
*nm_info
; /* node manager */
359 struct inode
*node_inode
; /* cache node blocks */
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 */
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 */
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 */
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 */
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 */
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 */
411 struct f2fs_mount_info mount_opt
; /* mount options */
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 */
419 * for stat information.
420 * one is for the LFS mode, and the other is for the SSR mode.
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 */
430 unsigned int last_victim
[2]; /* last victim segment # */
431 spinlock_t stat_lock
; /* lock for stat operations */
437 static inline struct f2fs_inode_info
*F2FS_I(struct inode
*inode
)
439 return container_of(inode
, struct f2fs_inode_info
, vfs_inode
);
442 static inline struct f2fs_sb_info
*F2FS_SB(struct super_block
*sb
)
444 return sb
->s_fs_info
;
447 static inline struct f2fs_super_block
*F2FS_RAW_SUPER(struct f2fs_sb_info
*sbi
)
449 return (struct f2fs_super_block
*)(sbi
->raw_super
);
452 static inline struct f2fs_checkpoint
*F2FS_CKPT(struct f2fs_sb_info
*sbi
)
454 return (struct f2fs_checkpoint
*)(sbi
->ckpt
);
457 static inline struct f2fs_nm_info
*NM_I(struct f2fs_sb_info
*sbi
)
459 return (struct f2fs_nm_info
*)(sbi
->nm_info
);
462 static inline struct f2fs_sm_info
*SM_I(struct f2fs_sb_info
*sbi
)
464 return (struct f2fs_sm_info
*)(sbi
->sm_info
);
467 static inline struct sit_info
*SIT_I(struct f2fs_sb_info
*sbi
)
469 return (struct sit_info
*)(SM_I(sbi
)->sit_info
);
472 static inline struct free_segmap_info
*FREE_I(struct f2fs_sb_info
*sbi
)
474 return (struct free_segmap_info
*)(SM_I(sbi
)->free_info
);
477 static inline struct dirty_seglist_info
*DIRTY_I(struct f2fs_sb_info
*sbi
)
479 return (struct dirty_seglist_info
*)(SM_I(sbi
)->dirty_info
);
482 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info
*sbi
)
487 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info
*sbi
)
492 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
494 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
495 return ckpt_flags
& f
;
498 static inline void set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
500 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
502 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
505 static inline void clear_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
507 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
509 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
512 static inline void mutex_lock_all(struct f2fs_sb_info
*sbi
)
516 for (i
= 0; i
< NR_GLOBAL_LOCKS
; i
++) {
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
523 mutex_lock_nest_lock(&sbi
->fs_lock
[i
], &sbi
->cp_mutex
);
527 static inline void mutex_unlock_all(struct f2fs_sb_info
*sbi
)
530 for (; i
< NR_GLOBAL_LOCKS
; i
++)
531 mutex_unlock(&sbi
->fs_lock
[i
]);
534 static inline int mutex_lock_op(struct f2fs_sb_info
*sbi
)
536 unsigned char next_lock
= sbi
->next_lock_num
% NR_GLOBAL_LOCKS
;
539 for (; i
< NR_GLOBAL_LOCKS
; i
++)
540 if (mutex_trylock(&sbi
->fs_lock
[i
]))
543 mutex_lock(&sbi
->fs_lock
[next_lock
]);
544 sbi
->next_lock_num
++;
548 static inline void mutex_unlock_op(struct f2fs_sb_info
*sbi
, int ilock
)
552 BUG_ON(ilock
>= NR_GLOBAL_LOCKS
);
553 mutex_unlock(&sbi
->fs_lock
[ilock
]);
557 * Check whether the given nid is within node id range.
559 static inline int check_nid_range(struct f2fs_sb_info
*sbi
, nid_t nid
)
561 WARN_ON((nid
>= NM_I(sbi
)->max_nid
));
562 if (nid
>= NM_I(sbi
)->max_nid
)
567 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
570 * Check whether the inode has blocks or not
572 static inline int F2FS_HAS_BLOCKS(struct inode
*inode
)
574 if (F2FS_I(inode
)->i_xattr_nid
)
575 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
+ 1);
577 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
);
580 static inline bool inc_valid_block_count(struct f2fs_sb_info
*sbi
,
581 struct inode
*inode
, blkcnt_t count
)
583 block_t valid_block_count
;
585 spin_lock(&sbi
->stat_lock
);
587 sbi
->total_valid_block_count
+ (block_t
)count
;
588 if (valid_block_count
> sbi
->user_block_count
) {
589 spin_unlock(&sbi
->stat_lock
);
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
);
599 static inline int dec_valid_block_count(struct f2fs_sb_info
*sbi
,
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
);
612 static inline void inc_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
614 atomic_inc(&sbi
->nr_pages
[count_type
]);
615 F2FS_SET_SB_DIRT(sbi
);
618 static inline void inode_inc_dirty_dents(struct inode
*inode
)
620 atomic_inc(&F2FS_I(inode
)->dirty_dents
);
623 static inline void dec_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
625 atomic_dec(&sbi
->nr_pages
[count_type
]);
628 static inline void inode_dec_dirty_dents(struct inode
*inode
)
630 atomic_dec(&F2FS_I(inode
)->dirty_dents
);
633 static inline int get_pages(struct f2fs_sb_info
*sbi
, int count_type
)
635 return atomic_read(&sbi
->nr_pages
[count_type
]);
638 static inline int get_blocktype_secs(struct f2fs_sb_info
*sbi
, int block_type
)
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
;
646 static inline block_t
valid_user_blocks(struct f2fs_sb_info
*sbi
)
649 spin_lock(&sbi
->stat_lock
);
650 ret
= sbi
->total_valid_block_count
;
651 spin_unlock(&sbi
->stat_lock
);
655 static inline unsigned long __bitmap_size(struct f2fs_sb_info
*sbi
, int flag
)
657 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
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
);
668 static inline void *__bitmap_ptr(struct f2fs_sb_info
*sbi
, int flag
)
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
;
676 static inline block_t
__start_cp_addr(struct f2fs_sb_info
*sbi
)
679 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
680 unsigned long long ckpt_version
= le64_to_cpu(ckpt
->checkpoint_ver
);
682 start_addr
= le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_blkaddr
);
685 * odd numbered checkpoint should at cp segment 0
686 * and even segent must be at cp segment 1
688 if (!(ckpt_version
& 1))
689 start_addr
+= sbi
->blocks_per_seg
;
694 static inline block_t
__start_sum_addr(struct f2fs_sb_info
*sbi
)
696 return le32_to_cpu(F2FS_CKPT(sbi
)->cp_pack_start_sum
);
699 static inline bool inc_valid_node_count(struct f2fs_sb_info
*sbi
,
703 block_t valid_block_count
;
704 unsigned int valid_node_count
;
706 spin_lock(&sbi
->stat_lock
);
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
;
712 if (valid_block_count
> sbi
->user_block_count
) {
713 spin_unlock(&sbi
->stat_lock
);
717 if (valid_node_count
> sbi
->total_node_count
) {
718 spin_unlock(&sbi
->stat_lock
);
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
);
731 static inline void dec_valid_node_count(struct f2fs_sb_info
*sbi
,
735 spin_lock(&sbi
->stat_lock
);
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
);
741 inode
->i_blocks
-= count
;
742 sbi
->total_valid_node_count
-= count
;
743 sbi
->total_valid_block_count
-= (block_t
)count
;
745 spin_unlock(&sbi
->stat_lock
);
748 static inline unsigned int valid_node_count(struct f2fs_sb_info
*sbi
)
751 spin_lock(&sbi
->stat_lock
);
752 ret
= sbi
->total_valid_node_count
;
753 spin_unlock(&sbi
->stat_lock
);
757 static inline void inc_valid_inode_count(struct f2fs_sb_info
*sbi
)
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
);
765 static inline int dec_valid_inode_count(struct f2fs_sb_info
*sbi
)
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
);
774 static inline unsigned int valid_inode_count(struct f2fs_sb_info
*sbi
)
777 spin_lock(&sbi
->stat_lock
);
778 ret
= sbi
->total_valid_inode_count
;
779 spin_unlock(&sbi
->stat_lock
);
783 static inline void f2fs_put_page(struct page
*page
, int unlock
)
785 if (!page
|| IS_ERR(page
))
789 BUG_ON(!PageLocked(page
));
792 page_cache_release(page
);
795 static inline void f2fs_put_dnode(struct dnode_of_data
*dn
)
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
;
805 static inline struct kmem_cache
*f2fs_kmem_cache_create(const char *name
,
806 size_t size
, void (*ctor
)(void *))
808 return kmem_cache_create(name
, size
, 0, SLAB_RECLAIM_ACCOUNT
, ctor
);
811 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
813 static inline bool IS_INODE(struct page
*page
)
815 struct f2fs_node
*p
= (struct f2fs_node
*)page_address(page
);
816 return RAW_IS_INODE(p
);
819 static inline __le32
*blkaddr_in_node(struct f2fs_node
*node
)
821 return RAW_IS_INODE(node
) ? node
->i
.i_addr
: node
->dn
.addr
;
824 static inline block_t
datablock_addr(struct page
*node_page
,
827 struct f2fs_node
*raw_node
;
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
]);
834 static inline int f2fs_test_bit(unsigned int nr
, char *addr
)
839 mask
= 1 << (7 - (nr
& 0x07));
843 static inline int f2fs_set_bit(unsigned int nr
, char *addr
)
849 mask
= 1 << (7 - (nr
& 0x07));
855 static inline int f2fs_clear_bit(unsigned int nr
, char *addr
)
861 mask
= 1 << (7 - (nr
& 0x07));
867 /* used for f2fs_inode_info->flags */
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 */
878 static inline void set_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
880 set_bit(flag
, &fi
->flags
);
883 static inline int is_inode_flag_set(struct f2fs_inode_info
*fi
, int flag
)
885 return test_bit(flag
, &fi
->flags
);
888 static inline void clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
890 clear_bit(flag
, &fi
->flags
);
893 static inline void set_acl_inode(struct f2fs_inode_info
*fi
, umode_t mode
)
895 fi
->i_acl_mode
= mode
;
896 set_inode_flag(fi
, FI_ACL_MODE
);
899 static inline int cond_clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
901 if (is_inode_flag_set(fi
, FI_ACL_MODE
)) {
902 clear_inode_flag(fi
, FI_ACL_MODE
);
908 static inline int f2fs_readonly(struct super_block
*sb
)
910 return sb
->s_flags
& MS_RDONLY
;
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);
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
*);
939 struct dentry
*f2fs_get_parent(struct dentry
*child
);
944 struct f2fs_dir_entry
*f2fs_find_entry(struct inode
*, struct qstr
*,
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
*);
955 static inline int f2fs_add_link(struct dentry
*dentry
, struct inode
*inode
)
957 return __f2fs_add_link(dentry
->d_parent
->d_inode
, &dentry
->d_name
,
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 *, ...);
971 f2fs_hash_t
f2fs_dentry_hash(const char *, size_t);
976 struct dnode_of_data
;
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);
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
*);
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);
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
*);
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);
1080 int recover_fsync_data(struct f2fs_sb_info
*);
1081 bool space_for_roll_forward(struct f2fs_sb_info
*);
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
;
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
];
1110 unsigned int segment_count
[2];
1111 unsigned int block_count
[2];
1112 unsigned base_mem
, cache_mem
;
1115 #define stat_inc_call_count(si) ((si)->call_count++)
1117 #define stat_inc_seg_count(sbi, type) \
1119 struct f2fs_stat_info *si = sbi->stat_info; \
1121 if (type == SUM_TYPE_DATA) \
1127 #define stat_inc_tot_blk_count(si, blks) \
1128 (si->tot_blks += (blks))
1130 #define stat_inc_data_blk_count(sbi, blks) \
1132 struct f2fs_stat_info *si = sbi->stat_info; \
1133 stat_inc_tot_blk_count(si, blks); \
1134 si->data_blks += (blks); \
1137 #define stat_inc_node_blk_count(sbi, blks) \
1139 struct f2fs_stat_info *si = sbi->stat_info; \
1140 stat_inc_tot_blk_count(si, blks); \
1141 si->node_blks += (blks); \
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);
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)
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) { }
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
;