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>
20 #include <linux/kobject.h>
21 #include <linux/sched.h>
26 #define F2FS_MOUNT_BG_GC 0x00000001
27 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
28 #define F2FS_MOUNT_DISCARD 0x00000004
29 #define F2FS_MOUNT_NOHEAP 0x00000008
30 #define F2FS_MOUNT_XATTR_USER 0x00000010
31 #define F2FS_MOUNT_POSIX_ACL 0x00000020
32 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
33 #define F2FS_MOUNT_INLINE_XATTR 0x00000080
35 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
36 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
37 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
39 #define ver_after(a, b) (typecheck(unsigned long long, a) && \
40 typecheck(unsigned long long, b) && \
41 ((long long)((a) - (b)) > 0))
43 typedef u32 block_t
; /*
44 * should not change u32, since it is the on-disk block
45 * address format, __le32.
49 struct f2fs_mount_info
{
53 #define CRCPOLY_LE 0xedb88320
55 static inline __u32
f2fs_crc32(void *buf
, size_t len
)
57 unsigned char *p
= (unsigned char *)buf
;
58 __u32 crc
= F2FS_SUPER_MAGIC
;
63 for (i
= 0; i
< 8; i
++)
64 crc
= (crc
>> 1) ^ ((crc
& 1) ? CRCPOLY_LE
: 0);
69 static inline bool f2fs_crc_valid(__u32 blk_crc
, void *buf
, size_t buf_size
)
71 return f2fs_crc32(buf
, buf_size
) == blk_crc
;
75 * For checkpoint manager
82 /* for the list of orphan inodes */
83 struct orphan_inode_entry
{
84 struct list_head list
; /* list head */
85 nid_t ino
; /* inode number */
88 /* for the list of directory inodes */
89 struct dir_inode_entry
{
90 struct list_head list
; /* list head */
91 struct inode
*inode
; /* vfs inode pointer */
94 /* for the list of fsync inodes, used only during recovery */
95 struct fsync_inode_entry
{
96 struct list_head list
; /* list head */
97 struct inode
*inode
; /* vfs inode pointer */
98 block_t blkaddr
; /* block address locating the last inode */
101 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
102 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
104 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
105 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
106 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
107 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
109 static inline int update_nats_in_cursum(struct f2fs_summary_block
*rs
, int i
)
111 int before
= nats_in_cursum(rs
);
112 rs
->n_nats
= cpu_to_le16(before
+ i
);
116 static inline int update_sits_in_cursum(struct f2fs_summary_block
*rs
, int i
)
118 int before
= sits_in_cursum(rs
);
119 rs
->n_sits
= cpu_to_le16(before
+ i
);
126 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
127 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
129 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
131 * ioctl commands in 32 bit emulation
133 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
134 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
138 * For INODE and NODE manager
141 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
142 * as its node offset to distinguish from index node blocks.
143 * But some bits are used to mark the node block.
145 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
148 ALLOC_NODE
, /* allocate a new node page if needed */
149 LOOKUP_NODE
, /* look up a node without readahead */
151 * look up a node with readahead called
152 * by get_datablock_ro.
156 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
158 /* for in-memory extent cache entry */
160 rwlock_t ext_lock
; /* rwlock for consistency */
161 unsigned int fofs
; /* start offset in a file */
162 u32 blk_addr
; /* start block address of the extent */
163 unsigned int len
; /* length of the extent */
167 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
169 #define FADVISE_COLD_BIT 0x01
170 #define FADVISE_LOST_PINO_BIT 0x02
172 struct f2fs_inode_info
{
173 struct inode vfs_inode
; /* serve a vfs inode */
174 unsigned long i_flags
; /* keep an inode flags for ioctl */
175 unsigned char i_advise
; /* use to give file attribute hints */
176 unsigned int i_current_depth
; /* use only in directory structure */
177 unsigned int i_pino
; /* parent inode number */
178 umode_t i_acl_mode
; /* keep file acl mode temporarily */
180 /* Use below internally in f2fs*/
181 unsigned long flags
; /* use to pass per-file flags */
182 atomic_t dirty_dents
; /* # of dirty dentry pages */
183 f2fs_hash_t chash
; /* hash value of given file name */
184 unsigned int clevel
; /* maximum level of given file name */
185 nid_t i_xattr_nid
; /* node id that contains xattrs */
186 unsigned long long xattr_ver
; /* cp version of xattr modification */
187 struct extent_info ext
; /* in-memory extent cache entry */
190 static inline void get_extent_info(struct extent_info
*ext
,
191 struct f2fs_extent i_ext
)
193 write_lock(&ext
->ext_lock
);
194 ext
->fofs
= le32_to_cpu(i_ext
.fofs
);
195 ext
->blk_addr
= le32_to_cpu(i_ext
.blk_addr
);
196 ext
->len
= le32_to_cpu(i_ext
.len
);
197 write_unlock(&ext
->ext_lock
);
200 static inline void set_raw_extent(struct extent_info
*ext
,
201 struct f2fs_extent
*i_ext
)
203 read_lock(&ext
->ext_lock
);
204 i_ext
->fofs
= cpu_to_le32(ext
->fofs
);
205 i_ext
->blk_addr
= cpu_to_le32(ext
->blk_addr
);
206 i_ext
->len
= cpu_to_le32(ext
->len
);
207 read_unlock(&ext
->ext_lock
);
210 struct f2fs_nm_info
{
211 block_t nat_blkaddr
; /* base disk address of NAT */
212 nid_t max_nid
; /* maximum possible node ids */
213 nid_t next_scan_nid
; /* the next nid to be scanned */
215 /* NAT cache management */
216 struct radix_tree_root nat_root
;/* root of the nat entry cache */
217 rwlock_t nat_tree_lock
; /* protect nat_tree_lock */
218 unsigned int nat_cnt
; /* the # of cached nat entries */
219 struct list_head nat_entries
; /* cached nat entry list (clean) */
220 struct list_head dirty_nat_entries
; /* cached nat entry list (dirty) */
222 /* free node ids management */
223 struct list_head free_nid_list
; /* a list for free nids */
224 spinlock_t free_nid_list_lock
; /* protect free nid list */
225 unsigned int fcnt
; /* the number of free node id */
226 struct mutex build_lock
; /* lock for build free nids */
229 char *nat_bitmap
; /* NAT bitmap pointer */
230 int bitmap_size
; /* bitmap size */
234 * this structure is used as one of function parameters.
235 * all the information are dedicated to a given direct node block determined
236 * by the data offset in a file.
238 struct dnode_of_data
{
239 struct inode
*inode
; /* vfs inode pointer */
240 struct page
*inode_page
; /* its inode page, NULL is possible */
241 struct page
*node_page
; /* cached direct node page */
242 nid_t nid
; /* node id of the direct node block */
243 unsigned int ofs_in_node
; /* data offset in the node page */
244 bool inode_page_locked
; /* inode page is locked or not */
245 block_t data_blkaddr
; /* block address of the node block */
248 static inline void set_new_dnode(struct dnode_of_data
*dn
, struct inode
*inode
,
249 struct page
*ipage
, struct page
*npage
, nid_t nid
)
251 memset(dn
, 0, sizeof(*dn
));
253 dn
->inode_page
= ipage
;
254 dn
->node_page
= npage
;
261 * By default, there are 6 active log areas across the whole main area.
262 * When considering hot and cold data separation to reduce cleaning overhead,
263 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
265 * In the current design, you should not change the numbers intentionally.
266 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
267 * logs individually according to the underlying devices. (default: 6)
268 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
269 * data and 8 for node logs.
271 #define NR_CURSEG_DATA_TYPE (3)
272 #define NR_CURSEG_NODE_TYPE (3)
273 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
276 CURSEG_HOT_DATA
= 0, /* directory entry blocks */
277 CURSEG_WARM_DATA
, /* data blocks */
278 CURSEG_COLD_DATA
, /* multimedia or GCed data blocks */
279 CURSEG_HOT_NODE
, /* direct node blocks of directory files */
280 CURSEG_WARM_NODE
, /* direct node blocks of normal files */
281 CURSEG_COLD_NODE
, /* indirect node blocks */
285 struct f2fs_sm_info
{
286 struct sit_info
*sit_info
; /* whole segment information */
287 struct free_segmap_info
*free_info
; /* free segment information */
288 struct dirty_seglist_info
*dirty_info
; /* dirty segment information */
289 struct curseg_info
*curseg_array
; /* active segment information */
291 struct list_head wblist_head
; /* list of under-writeback pages */
292 spinlock_t wblist_lock
; /* lock for checkpoint */
294 block_t seg0_blkaddr
; /* block address of 0'th segment */
295 block_t main_blkaddr
; /* start block address of main area */
296 block_t ssa_blkaddr
; /* start block address of SSA area */
298 unsigned int segment_count
; /* total # of segments */
299 unsigned int main_segments
; /* # of segments in main area */
300 unsigned int reserved_segments
; /* # of reserved segments */
301 unsigned int ovp_segments
; /* # of overprovision segments */
308 * COUNT_TYPE for monitoring
310 * f2fs monitors the number of several block types such as on-writeback,
311 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
322 * The below are the page types of bios used in submti_bio().
323 * The available types are:
324 * DATA User data pages. It operates as async mode.
325 * NODE Node pages. It operates as async mode.
326 * META FS metadata pages such as SIT, NAT, CP.
327 * NR_PAGE_TYPE The number of page types.
328 * META_FLUSH Make sure the previous pages are written
329 * with waiting the bio's completion
330 * ... Only can be used with META.
340 struct f2fs_sb_info
{
341 struct super_block
*sb
; /* pointer to VFS super block */
342 struct proc_dir_entry
*s_proc
; /* proc entry */
343 struct buffer_head
*raw_super_buf
; /* buffer head of raw sb */
344 struct f2fs_super_block
*raw_super
; /* raw super block pointer */
345 int s_dirty
; /* dirty flag for checkpoint */
347 /* for node-related operations */
348 struct f2fs_nm_info
*nm_info
; /* node manager */
349 struct inode
*node_inode
; /* cache node blocks */
351 /* for segment-related operations */
352 struct f2fs_sm_info
*sm_info
; /* segment manager */
353 struct bio
*bio
[NR_PAGE_TYPE
]; /* bios to merge */
354 sector_t last_block_in_bio
[NR_PAGE_TYPE
]; /* last block number */
355 struct rw_semaphore bio_sem
; /* IO semaphore */
358 struct f2fs_checkpoint
*ckpt
; /* raw checkpoint pointer */
359 struct inode
*meta_inode
; /* cache meta blocks */
360 struct mutex cp_mutex
; /* checkpoint procedure lock */
361 struct rw_semaphore cp_rwsem
; /* blocking FS operations */
362 struct mutex node_write
; /* locking node writes */
363 struct mutex writepages
; /* mutex for writepages() */
364 int por_doing
; /* recovery is doing or not */
365 int on_build_free_nids
; /* build_free_nids is doing */
366 struct task_struct
*cp_task
; /* checkpoint task */
368 /* for orphan inode management */
369 struct list_head orphan_inode_list
; /* orphan inode list */
370 struct mutex orphan_inode_mutex
; /* for orphan inode list */
371 unsigned int n_orphans
; /* # of orphan inodes */
373 /* for directory inode management */
374 struct list_head dir_inode_list
; /* dir inode list */
375 spinlock_t dir_inode_lock
; /* for dir inode list lock */
377 /* basic file system units */
378 unsigned int log_sectors_per_block
; /* log2 sectors per block */
379 unsigned int log_blocksize
; /* log2 block size */
380 unsigned int blocksize
; /* block size */
381 unsigned int root_ino_num
; /* root inode number*/
382 unsigned int node_ino_num
; /* node inode number*/
383 unsigned int meta_ino_num
; /* meta inode number*/
384 unsigned int log_blocks_per_seg
; /* log2 blocks per segment */
385 unsigned int blocks_per_seg
; /* blocks per segment */
386 unsigned int segs_per_sec
; /* segments per section */
387 unsigned int secs_per_zone
; /* sections per zone */
388 unsigned int total_sections
; /* total section count */
389 unsigned int total_node_count
; /* total node block count */
390 unsigned int total_valid_node_count
; /* valid node block count */
391 unsigned int total_valid_inode_count
; /* valid inode count */
392 int active_logs
; /* # of active logs */
394 block_t user_block_count
; /* # of user blocks */
395 block_t total_valid_block_count
; /* # of valid blocks */
396 block_t alloc_valid_block_count
; /* # of allocated blocks */
397 block_t last_valid_block_count
; /* for recovery */
398 u32 s_next_generation
; /* for NFS support */
399 atomic_t nr_pages
[NR_COUNT_TYPE
]; /* # of pages, see count_type */
401 struct f2fs_mount_info mount_opt
; /* mount options */
403 /* for cleaning operations */
404 struct mutex gc_mutex
; /* mutex for GC */
405 struct f2fs_gc_kthread
*gc_thread
; /* GC thread */
406 unsigned int cur_victim_sec
; /* current victim section num */
409 * for stat information.
410 * one is for the LFS mode, and the other is for the SSR mode.
412 #ifdef CONFIG_F2FS_STAT_FS
413 struct f2fs_stat_info
*stat_info
; /* FS status information */
414 unsigned int segment_count
[2]; /* # of allocated segments */
415 unsigned int block_count
[2]; /* # of allocated blocks */
416 int total_hit_ext
, read_hit_ext
; /* extent cache hit ratio */
417 int bg_gc
; /* background gc calls */
418 unsigned int n_dirty_dirs
; /* # of dir inodes */
420 unsigned int last_victim
[2]; /* last victim segment # */
421 spinlock_t stat_lock
; /* lock for stat operations */
423 /* For sysfs suppport */
424 struct kobject s_kobj
;
425 struct completion s_kobj_unregister
;
431 static inline struct f2fs_inode_info
*F2FS_I(struct inode
*inode
)
433 return container_of(inode
, struct f2fs_inode_info
, vfs_inode
);
436 static inline struct f2fs_sb_info
*F2FS_SB(struct super_block
*sb
)
438 return sb
->s_fs_info
;
441 static inline struct f2fs_super_block
*F2FS_RAW_SUPER(struct f2fs_sb_info
*sbi
)
443 return (struct f2fs_super_block
*)(sbi
->raw_super
);
446 static inline struct f2fs_checkpoint
*F2FS_CKPT(struct f2fs_sb_info
*sbi
)
448 return (struct f2fs_checkpoint
*)(sbi
->ckpt
);
451 static inline struct f2fs_node
*F2FS_NODE(struct page
*page
)
453 return (struct f2fs_node
*)page_address(page
);
456 static inline struct f2fs_nm_info
*NM_I(struct f2fs_sb_info
*sbi
)
458 return (struct f2fs_nm_info
*)(sbi
->nm_info
);
461 static inline struct f2fs_sm_info
*SM_I(struct f2fs_sb_info
*sbi
)
463 return (struct f2fs_sm_info
*)(sbi
->sm_info
);
466 static inline struct sit_info
*SIT_I(struct f2fs_sb_info
*sbi
)
468 return (struct sit_info
*)(SM_I(sbi
)->sit_info
);
471 static inline struct free_segmap_info
*FREE_I(struct f2fs_sb_info
*sbi
)
473 return (struct free_segmap_info
*)(SM_I(sbi
)->free_info
);
476 static inline struct dirty_seglist_info
*DIRTY_I(struct f2fs_sb_info
*sbi
)
478 return (struct dirty_seglist_info
*)(SM_I(sbi
)->dirty_info
);
481 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info
*sbi
)
486 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info
*sbi
)
491 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint
*cp
)
493 return le64_to_cpu(cp
->checkpoint_ver
);
496 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
498 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
499 return ckpt_flags
& f
;
502 static inline void set_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
504 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
506 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
509 static inline void clear_ckpt_flags(struct f2fs_checkpoint
*cp
, unsigned int f
)
511 unsigned int ckpt_flags
= le32_to_cpu(cp
->ckpt_flags
);
513 cp
->ckpt_flags
= cpu_to_le32(ckpt_flags
);
516 static inline void f2fs_lock_op(struct f2fs_sb_info
*sbi
)
518 down_read(&sbi
->cp_rwsem
);
521 static inline void f2fs_unlock_op(struct f2fs_sb_info
*sbi
)
523 up_read(&sbi
->cp_rwsem
);
526 static inline void f2fs_lock_all(struct f2fs_sb_info
*sbi
)
528 down_write_nest_lock(&sbi
->cp_rwsem
, &sbi
->cp_mutex
);
531 static inline void f2fs_unlock_all(struct f2fs_sb_info
*sbi
)
533 up_write(&sbi
->cp_rwsem
);
537 * Check whether the given nid is within node id range.
539 static inline int check_nid_range(struct f2fs_sb_info
*sbi
, nid_t nid
)
541 WARN_ON((nid
>= NM_I(sbi
)->max_nid
));
542 if (nid
>= NM_I(sbi
)->max_nid
)
547 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
550 * Check whether the inode has blocks or not
552 static inline int F2FS_HAS_BLOCKS(struct inode
*inode
)
554 if (F2FS_I(inode
)->i_xattr_nid
)
555 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
+ 1);
557 return (inode
->i_blocks
> F2FS_DEFAULT_ALLOCATED_BLOCKS
);
560 static inline bool inc_valid_block_count(struct f2fs_sb_info
*sbi
,
561 struct inode
*inode
, blkcnt_t count
)
563 block_t valid_block_count
;
565 spin_lock(&sbi
->stat_lock
);
567 sbi
->total_valid_block_count
+ (block_t
)count
;
568 if (valid_block_count
> sbi
->user_block_count
) {
569 spin_unlock(&sbi
->stat_lock
);
572 inode
->i_blocks
+= count
;
573 sbi
->total_valid_block_count
= valid_block_count
;
574 sbi
->alloc_valid_block_count
+= (block_t
)count
;
575 spin_unlock(&sbi
->stat_lock
);
579 static inline int dec_valid_block_count(struct f2fs_sb_info
*sbi
,
583 spin_lock(&sbi
->stat_lock
);
584 BUG_ON(sbi
->total_valid_block_count
< (block_t
) count
);
585 BUG_ON(inode
->i_blocks
< count
);
586 inode
->i_blocks
-= count
;
587 sbi
->total_valid_block_count
-= (block_t
)count
;
588 spin_unlock(&sbi
->stat_lock
);
592 static inline void inc_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
594 atomic_inc(&sbi
->nr_pages
[count_type
]);
595 F2FS_SET_SB_DIRT(sbi
);
598 static inline void inode_inc_dirty_dents(struct inode
*inode
)
600 atomic_inc(&F2FS_I(inode
)->dirty_dents
);
603 static inline void dec_page_count(struct f2fs_sb_info
*sbi
, int count_type
)
605 atomic_dec(&sbi
->nr_pages
[count_type
]);
608 static inline void inode_dec_dirty_dents(struct inode
*inode
)
610 atomic_dec(&F2FS_I(inode
)->dirty_dents
);
613 static inline int get_pages(struct f2fs_sb_info
*sbi
, int count_type
)
615 return atomic_read(&sbi
->nr_pages
[count_type
]);
618 static inline int get_blocktype_secs(struct f2fs_sb_info
*sbi
, int block_type
)
620 unsigned int pages_per_sec
= sbi
->segs_per_sec
*
621 (1 << sbi
->log_blocks_per_seg
);
622 return ((get_pages(sbi
, block_type
) + pages_per_sec
- 1)
623 >> sbi
->log_blocks_per_seg
) / sbi
->segs_per_sec
;
626 static inline block_t
valid_user_blocks(struct f2fs_sb_info
*sbi
)
629 spin_lock(&sbi
->stat_lock
);
630 ret
= sbi
->total_valid_block_count
;
631 spin_unlock(&sbi
->stat_lock
);
635 static inline unsigned long __bitmap_size(struct f2fs_sb_info
*sbi
, int flag
)
637 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
639 /* return NAT or SIT bitmap */
640 if (flag
== NAT_BITMAP
)
641 return le32_to_cpu(ckpt
->nat_ver_bitmap_bytesize
);
642 else if (flag
== SIT_BITMAP
)
643 return le32_to_cpu(ckpt
->sit_ver_bitmap_bytesize
);
648 static inline void *__bitmap_ptr(struct f2fs_sb_info
*sbi
, int flag
)
650 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
651 int offset
= (flag
== NAT_BITMAP
) ?
652 le32_to_cpu(ckpt
->sit_ver_bitmap_bytesize
) : 0;
653 return &ckpt
->sit_nat_version_bitmap
+ offset
;
656 static inline block_t
__start_cp_addr(struct f2fs_sb_info
*sbi
)
659 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
660 unsigned long long ckpt_version
= cur_cp_version(ckpt
);
662 start_addr
= le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_blkaddr
);
665 * odd numbered checkpoint should at cp segment 0
666 * and even segent must be at cp segment 1
668 if (!(ckpt_version
& 1))
669 start_addr
+= sbi
->blocks_per_seg
;
674 static inline block_t
__start_sum_addr(struct f2fs_sb_info
*sbi
)
676 return le32_to_cpu(F2FS_CKPT(sbi
)->cp_pack_start_sum
);
679 static inline bool inc_valid_node_count(struct f2fs_sb_info
*sbi
,
683 block_t valid_block_count
;
684 unsigned int valid_node_count
;
686 spin_lock(&sbi
->stat_lock
);
688 valid_block_count
= sbi
->total_valid_block_count
+ (block_t
)count
;
689 sbi
->alloc_valid_block_count
+= (block_t
)count
;
690 valid_node_count
= sbi
->total_valid_node_count
+ count
;
692 if (valid_block_count
> sbi
->user_block_count
) {
693 spin_unlock(&sbi
->stat_lock
);
697 if (valid_node_count
> sbi
->total_node_count
) {
698 spin_unlock(&sbi
->stat_lock
);
703 inode
->i_blocks
+= count
;
704 sbi
->total_valid_node_count
= valid_node_count
;
705 sbi
->total_valid_block_count
= valid_block_count
;
706 spin_unlock(&sbi
->stat_lock
);
711 static inline void dec_valid_node_count(struct f2fs_sb_info
*sbi
,
715 spin_lock(&sbi
->stat_lock
);
717 BUG_ON(sbi
->total_valid_block_count
< count
);
718 BUG_ON(sbi
->total_valid_node_count
< count
);
719 BUG_ON(inode
->i_blocks
< count
);
721 inode
->i_blocks
-= count
;
722 sbi
->total_valid_node_count
-= count
;
723 sbi
->total_valid_block_count
-= (block_t
)count
;
725 spin_unlock(&sbi
->stat_lock
);
728 static inline unsigned int valid_node_count(struct f2fs_sb_info
*sbi
)
731 spin_lock(&sbi
->stat_lock
);
732 ret
= sbi
->total_valid_node_count
;
733 spin_unlock(&sbi
->stat_lock
);
737 static inline void inc_valid_inode_count(struct f2fs_sb_info
*sbi
)
739 spin_lock(&sbi
->stat_lock
);
740 BUG_ON(sbi
->total_valid_inode_count
== sbi
->total_node_count
);
741 sbi
->total_valid_inode_count
++;
742 spin_unlock(&sbi
->stat_lock
);
745 static inline int dec_valid_inode_count(struct f2fs_sb_info
*sbi
)
747 spin_lock(&sbi
->stat_lock
);
748 BUG_ON(!sbi
->total_valid_inode_count
);
749 sbi
->total_valid_inode_count
--;
750 spin_unlock(&sbi
->stat_lock
);
754 static inline unsigned int valid_inode_count(struct f2fs_sb_info
*sbi
)
757 spin_lock(&sbi
->stat_lock
);
758 ret
= sbi
->total_valid_inode_count
;
759 spin_unlock(&sbi
->stat_lock
);
763 static inline void f2fs_put_page(struct page
*page
, int unlock
)
765 if (!page
|| IS_ERR(page
))
769 BUG_ON(!PageLocked(page
));
772 page_cache_release(page
);
775 static inline void f2fs_put_dnode(struct dnode_of_data
*dn
)
778 f2fs_put_page(dn
->node_page
, 1);
779 if (dn
->inode_page
&& dn
->node_page
!= dn
->inode_page
)
780 f2fs_put_page(dn
->inode_page
, 0);
781 dn
->node_page
= NULL
;
782 dn
->inode_page
= NULL
;
785 static inline struct kmem_cache
*f2fs_kmem_cache_create(const char *name
,
786 size_t size
, void (*ctor
)(void *))
788 return kmem_cache_create(name
, size
, 0, SLAB_RECLAIM_ACCOUNT
, ctor
);
791 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache
*cachep
,
796 entry
= kmem_cache_alloc(cachep
, flags
);
805 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
807 static inline bool IS_INODE(struct page
*page
)
809 struct f2fs_node
*p
= F2FS_NODE(page
);
810 return RAW_IS_INODE(p
);
813 static inline __le32
*blkaddr_in_node(struct f2fs_node
*node
)
815 return RAW_IS_INODE(node
) ? node
->i
.i_addr
: node
->dn
.addr
;
818 static inline block_t
datablock_addr(struct page
*node_page
,
821 struct f2fs_node
*raw_node
;
823 raw_node
= F2FS_NODE(node_page
);
824 addr_array
= blkaddr_in_node(raw_node
);
825 return le32_to_cpu(addr_array
[offset
]);
828 static inline int f2fs_test_bit(unsigned int nr
, char *addr
)
833 mask
= 1 << (7 - (nr
& 0x07));
837 static inline int f2fs_set_bit(unsigned int nr
, char *addr
)
843 mask
= 1 << (7 - (nr
& 0x07));
849 static inline int f2fs_clear_bit(unsigned int nr
, char *addr
)
855 mask
= 1 << (7 - (nr
& 0x07));
861 /* used for f2fs_inode_info->flags */
863 FI_NEW_INODE
, /* indicate newly allocated inode */
864 FI_DIRTY_INODE
, /* indicate inode is dirty or not */
865 FI_INC_LINK
, /* need to increment i_nlink */
866 FI_ACL_MODE
, /* indicate acl mode */
867 FI_NO_ALLOC
, /* should not allocate any blocks */
868 FI_UPDATE_DIR
, /* should update inode block for consistency */
869 FI_DELAY_IPUT
, /* used for the recovery */
870 FI_INLINE_XATTR
, /* used for inline xattr */
873 static inline void set_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
875 set_bit(flag
, &fi
->flags
);
878 static inline int is_inode_flag_set(struct f2fs_inode_info
*fi
, int flag
)
880 return test_bit(flag
, &fi
->flags
);
883 static inline void clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
885 clear_bit(flag
, &fi
->flags
);
888 static inline void set_acl_inode(struct f2fs_inode_info
*fi
, umode_t mode
)
890 fi
->i_acl_mode
= mode
;
891 set_inode_flag(fi
, FI_ACL_MODE
);
894 static inline int cond_clear_inode_flag(struct f2fs_inode_info
*fi
, int flag
)
896 if (is_inode_flag_set(fi
, FI_ACL_MODE
)) {
897 clear_inode_flag(fi
, FI_ACL_MODE
);
903 static inline void get_inline_info(struct f2fs_inode_info
*fi
,
904 struct f2fs_inode
*ri
)
906 if (ri
->i_inline
& F2FS_INLINE_XATTR
)
907 set_inode_flag(fi
, FI_INLINE_XATTR
);
910 static inline void set_raw_inline(struct f2fs_inode_info
*fi
,
911 struct f2fs_inode
*ri
)
915 if (is_inode_flag_set(fi
, FI_INLINE_XATTR
))
916 ri
->i_inline
|= F2FS_INLINE_XATTR
;
919 static inline unsigned int addrs_per_inode(struct f2fs_inode_info
*fi
)
921 if (is_inode_flag_set(fi
, FI_INLINE_XATTR
))
922 return DEF_ADDRS_PER_INODE
- F2FS_INLINE_XATTR_ADDRS
;
923 return DEF_ADDRS_PER_INODE
;
926 static inline void *inline_xattr_addr(struct page
*page
)
928 struct f2fs_inode
*ri
;
929 ri
= (struct f2fs_inode
*)page_address(page
);
930 return (void *)&(ri
->i_addr
[DEF_ADDRS_PER_INODE
-
931 F2FS_INLINE_XATTR_ADDRS
]);
934 static inline int inline_xattr_size(struct inode
*inode
)
936 if (is_inode_flag_set(F2FS_I(inode
), FI_INLINE_XATTR
))
937 return F2FS_INLINE_XATTR_ADDRS
<< 2;
942 static inline int f2fs_readonly(struct super_block
*sb
)
944 return sb
->s_flags
& MS_RDONLY
;
950 int f2fs_sync_file(struct file
*, loff_t
, loff_t
, int);
951 void truncate_data_blocks(struct dnode_of_data
*);
952 void f2fs_truncate(struct inode
*);
953 int f2fs_getattr(struct vfsmount
*, struct dentry
*, struct kstat
*);
954 int f2fs_setattr(struct dentry
*, struct iattr
*);
955 int truncate_hole(struct inode
*, pgoff_t
, pgoff_t
);
956 int truncate_data_blocks_range(struct dnode_of_data
*, int);
957 long f2fs_ioctl(struct file
*, unsigned int, unsigned long);
958 long f2fs_compat_ioctl(struct file
*, unsigned int, unsigned long);
963 void f2fs_set_inode_flags(struct inode
*);
964 struct inode
*f2fs_iget(struct super_block
*, unsigned long);
965 void update_inode(struct inode
*, struct page
*);
966 int update_inode_page(struct inode
*);
967 int f2fs_write_inode(struct inode
*, struct writeback_control
*);
968 void f2fs_evict_inode(struct inode
*);
973 struct dentry
*f2fs_get_parent(struct dentry
*child
);
978 struct f2fs_dir_entry
*f2fs_find_entry(struct inode
*, struct qstr
*,
980 struct f2fs_dir_entry
*f2fs_parent_dir(struct inode
*, struct page
**);
981 ino_t
f2fs_inode_by_name(struct inode
*, struct qstr
*);
982 void f2fs_set_link(struct inode
*, struct f2fs_dir_entry
*,
983 struct page
*, struct inode
*);
984 int update_dent_inode(struct inode
*, const struct qstr
*);
985 int __f2fs_add_link(struct inode
*, const struct qstr
*, struct inode
*);
986 void f2fs_delete_entry(struct f2fs_dir_entry
*, struct page
*, struct inode
*);
987 int f2fs_make_empty(struct inode
*, struct inode
*);
988 bool f2fs_empty_dir(struct inode
*);
990 static inline int f2fs_add_link(struct dentry
*dentry
, struct inode
*inode
)
992 return __f2fs_add_link(dentry
->d_parent
->d_inode
, &dentry
->d_name
,
999 int f2fs_sync_fs(struct super_block
*, int);
1000 extern __printf(3, 4)
1001 void f2fs_msg(struct super_block
*, const char *, const char *, ...);
1006 f2fs_hash_t
f2fs_dentry_hash(const char *, size_t);
1011 struct dnode_of_data
;
1014 int is_checkpointed_node(struct f2fs_sb_info
*, nid_t
);
1015 void get_node_info(struct f2fs_sb_info
*, nid_t
, struct node_info
*);
1016 int get_dnode_of_data(struct dnode_of_data
*, pgoff_t
, int);
1017 int truncate_inode_blocks(struct inode
*, pgoff_t
);
1018 int truncate_xattr_node(struct inode
*, struct page
*);
1019 int remove_inode_page(struct inode
*);
1020 struct page
*new_inode_page(struct inode
*, const struct qstr
*);
1021 struct page
*new_node_page(struct dnode_of_data
*, unsigned int, struct page
*);
1022 void ra_node_page(struct f2fs_sb_info
*, nid_t
);
1023 struct page
*get_node_page(struct f2fs_sb_info
*, pgoff_t
);
1024 struct page
*get_node_page_ra(struct page
*, int);
1025 void sync_inode_page(struct dnode_of_data
*);
1026 int sync_node_pages(struct f2fs_sb_info
*, nid_t
, struct writeback_control
*);
1027 bool alloc_nid(struct f2fs_sb_info
*, nid_t
*);
1028 void alloc_nid_done(struct f2fs_sb_info
*, nid_t
);
1029 void alloc_nid_failed(struct f2fs_sb_info
*, nid_t
);
1030 void recover_node_page(struct f2fs_sb_info
*, struct page
*,
1031 struct f2fs_summary
*, struct node_info
*, block_t
);
1032 int recover_inode_page(struct f2fs_sb_info
*, struct page
*);
1033 int restore_node_summary(struct f2fs_sb_info
*, unsigned int,
1034 struct f2fs_summary_block
*);
1035 void flush_nat_entries(struct f2fs_sb_info
*);
1036 int build_node_manager(struct f2fs_sb_info
*);
1037 void destroy_node_manager(struct f2fs_sb_info
*);
1038 int __init
create_node_manager_caches(void);
1039 void destroy_node_manager_caches(void);
1044 void f2fs_balance_fs(struct f2fs_sb_info
*);
1045 void invalidate_blocks(struct f2fs_sb_info
*, block_t
);
1046 void clear_prefree_segments(struct f2fs_sb_info
*);
1047 int npages_for_summary_flush(struct f2fs_sb_info
*);
1048 void allocate_new_segments(struct f2fs_sb_info
*);
1049 struct page
*get_sum_page(struct f2fs_sb_info
*, unsigned int);
1050 struct bio
*f2fs_bio_alloc(struct block_device
*, int);
1051 void f2fs_submit_bio(struct f2fs_sb_info
*, enum page_type
, bool);
1052 void f2fs_wait_on_page_writeback(struct page
*, enum page_type
, bool);
1053 void write_meta_page(struct f2fs_sb_info
*, struct page
*);
1054 void write_node_page(struct f2fs_sb_info
*, struct page
*, unsigned int,
1055 block_t
, block_t
*);
1056 void write_data_page(struct inode
*, struct page
*, struct dnode_of_data
*,
1057 block_t
, block_t
*);
1058 void rewrite_data_page(struct f2fs_sb_info
*, struct page
*, block_t
);
1059 void recover_data_page(struct f2fs_sb_info
*, struct page
*,
1060 struct f2fs_summary
*, block_t
, block_t
);
1061 void rewrite_node_page(struct f2fs_sb_info
*, struct page
*,
1062 struct f2fs_summary
*, block_t
, block_t
);
1063 void write_data_summaries(struct f2fs_sb_info
*, block_t
);
1064 void write_node_summaries(struct f2fs_sb_info
*, block_t
);
1065 int lookup_journal_in_cursum(struct f2fs_summary_block
*,
1066 int, unsigned int, int);
1067 void flush_sit_entries(struct f2fs_sb_info
*);
1068 int build_segment_manager(struct f2fs_sb_info
*);
1069 void destroy_segment_manager(struct f2fs_sb_info
*);
1074 struct page
*grab_meta_page(struct f2fs_sb_info
*, pgoff_t
);
1075 struct page
*get_meta_page(struct f2fs_sb_info
*, pgoff_t
);
1076 long sync_meta_pages(struct f2fs_sb_info
*, enum page_type
, long);
1077 int acquire_orphan_inode(struct f2fs_sb_info
*);
1078 void release_orphan_inode(struct f2fs_sb_info
*);
1079 void add_orphan_inode(struct f2fs_sb_info
*, nid_t
);
1080 void remove_orphan_inode(struct f2fs_sb_info
*, nid_t
);
1081 int recover_orphan_inodes(struct f2fs_sb_info
*);
1082 int get_valid_checkpoint(struct f2fs_sb_info
*);
1083 void set_dirty_dir_page(struct inode
*, struct page
*);
1084 void add_dirty_dir_inode(struct inode
*);
1085 void remove_dirty_dir_inode(struct inode
*);
1086 struct inode
*check_dirty_dir_inode(struct f2fs_sb_info
*, nid_t
);
1087 void sync_dirty_dir_inodes(struct f2fs_sb_info
*);
1088 void write_checkpoint(struct f2fs_sb_info
*, bool);
1089 void init_orphan_info(struct f2fs_sb_info
*);
1090 int __init
create_checkpoint_caches(void);
1091 void destroy_checkpoint_caches(void);
1096 int reserve_new_block(struct dnode_of_data
*);
1097 void update_extent_cache(block_t
, struct dnode_of_data
*);
1098 struct page
*find_data_page(struct inode
*, pgoff_t
, bool);
1099 struct page
*get_lock_data_page(struct inode
*, pgoff_t
);
1100 struct page
*get_new_data_page(struct inode
*, struct page
*, pgoff_t
, bool);
1101 int f2fs_readpage(struct f2fs_sb_info
*, struct page
*, block_t
, int);
1102 int do_write_data_page(struct page
*);
1107 int start_gc_thread(struct f2fs_sb_info
*);
1108 void stop_gc_thread(struct f2fs_sb_info
*);
1109 block_t
start_bidx_of_node(unsigned int, struct f2fs_inode_info
*);
1110 int f2fs_gc(struct f2fs_sb_info
*);
1111 void build_gc_manager(struct f2fs_sb_info
*);
1112 int __init
create_gc_caches(void);
1113 void destroy_gc_caches(void);
1118 int recover_fsync_data(struct f2fs_sb_info
*);
1119 bool space_for_roll_forward(struct f2fs_sb_info
*);
1124 #ifdef CONFIG_F2FS_STAT_FS
1125 struct f2fs_stat_info
{
1126 struct list_head stat_list
;
1127 struct f2fs_sb_info
*sbi
;
1128 struct mutex stat_lock
;
1129 int all_area_segs
, sit_area_segs
, nat_area_segs
, ssa_area_segs
;
1130 int main_area_segs
, main_area_sections
, main_area_zones
;
1131 int hit_ext
, total_ext
;
1132 int ndirty_node
, ndirty_dent
, ndirty_dirs
, ndirty_meta
;
1133 int nats
, sits
, fnids
;
1134 int total_count
, utilization
;
1136 unsigned int valid_count
, valid_node_count
, valid_inode_count
;
1137 unsigned int bimodal
, avg_vblocks
;
1138 int util_free
, util_valid
, util_invalid
;
1139 int rsvd_segs
, overp_segs
;
1140 int dirty_count
, node_pages
, meta_pages
;
1141 int prefree_count
, call_count
;
1142 int tot_segs
, node_segs
, data_segs
, free_segs
, free_secs
;
1143 int tot_blks
, data_blks
, node_blks
;
1144 int curseg
[NR_CURSEG_TYPE
];
1145 int cursec
[NR_CURSEG_TYPE
];
1146 int curzone
[NR_CURSEG_TYPE
];
1148 unsigned int segment_count
[2];
1149 unsigned int block_count
[2];
1150 unsigned base_mem
, cache_mem
;
1153 static inline struct f2fs_stat_info
*F2FS_STAT(struct f2fs_sb_info
*sbi
)
1155 return (struct f2fs_stat_info
*)sbi
->stat_info
;
1158 #define stat_inc_call_count(si) ((si)->call_count++)
1159 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1160 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1161 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1162 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1163 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1164 #define stat_inc_seg_type(sbi, curseg) \
1165 ((sbi)->segment_count[(curseg)->alloc_type]++)
1166 #define stat_inc_block_count(sbi, curseg) \
1167 ((sbi)->block_count[(curseg)->alloc_type]++)
1169 #define stat_inc_seg_count(sbi, type) \
1171 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1173 if (type == SUM_TYPE_DATA) \
1179 #define stat_inc_tot_blk_count(si, blks) \
1180 (si->tot_blks += (blks))
1182 #define stat_inc_data_blk_count(sbi, blks) \
1184 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1185 stat_inc_tot_blk_count(si, blks); \
1186 si->data_blks += (blks); \
1189 #define stat_inc_node_blk_count(sbi, blks) \
1191 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1192 stat_inc_tot_blk_count(si, blks); \
1193 si->node_blks += (blks); \
1196 int f2fs_build_stats(struct f2fs_sb_info
*);
1197 void f2fs_destroy_stats(struct f2fs_sb_info
*);
1198 void __init
f2fs_create_root_stats(void);
1199 void f2fs_destroy_root_stats(void);
1201 #define stat_inc_call_count(si)
1202 #define stat_inc_bggc_count(si)
1203 #define stat_inc_dirty_dir(sbi)
1204 #define stat_dec_dirty_dir(sbi)
1205 #define stat_inc_total_hit(sb)
1206 #define stat_inc_read_hit(sb)
1207 #define stat_inc_seg_type(sbi, curseg)
1208 #define stat_inc_block_count(sbi, curseg)
1209 #define stat_inc_seg_count(si, type)
1210 #define stat_inc_tot_blk_count(si, blks)
1211 #define stat_inc_data_blk_count(si, blks)
1212 #define stat_inc_node_blk_count(sbi, blks)
1214 static inline int f2fs_build_stats(struct f2fs_sb_info
*sbi
) { return 0; }
1215 static inline void f2fs_destroy_stats(struct f2fs_sb_info
*sbi
) { }
1216 static inline void __init
f2fs_create_root_stats(void) { }
1217 static inline void f2fs_destroy_root_stats(void) { }
1220 extern const struct file_operations f2fs_dir_operations
;
1221 extern const struct file_operations f2fs_file_operations
;
1222 extern const struct inode_operations f2fs_file_inode_operations
;
1223 extern const struct address_space_operations f2fs_dblock_aops
;
1224 extern const struct address_space_operations f2fs_node_aops
;
1225 extern const struct address_space_operations f2fs_meta_aops
;
1226 extern const struct inode_operations f2fs_dir_inode_operations
;
1227 extern const struct inode_operations f2fs_symlink_inode_operations
;
1228 extern const struct inode_operations f2fs_special_inode_operations
;