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>
23 #ifdef CONFIG_F2FS_CHECK_FS
24 #define f2fs_bug_on(condition) BUG_ON(condition)
26 #define f2fs_bug_on(condition)
32 #define F2FS_MOUNT_BG_GC 0x00000001
33 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
34 #define F2FS_MOUNT_DISCARD 0x00000004
35 #define F2FS_MOUNT_NOHEAP 0x00000008
36 #define F2FS_MOUNT_XATTR_USER 0x00000010
37 #define F2FS_MOUNT_POSIX_ACL 0x00000020
38 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
39 #define F2FS_MOUNT_INLINE_XATTR 0x00000080
41 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
42 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
43 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
45 #define ver_after(a, b) (typecheck(unsigned long long, a) && \
46 typecheck(unsigned long long, b) && \
47 ((long long)((a) - (b)) > 0))
49 typedef u32 block_t; /*
50 * should not change u32, since it is the on-disk block
51 * address format, __le32.
55 struct f2fs_mount_info {
59 #define CRCPOLY_LE 0xedb88320
61 static inline __u32 f2fs_crc32(void *buf, size_t len)
63 unsigned char *p = (unsigned char *)buf;
64 __u32 crc = F2FS_SUPER_MAGIC;
69 for (i = 0; i < 8; i++)
70 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
75 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
77 return f2fs_crc32(buf, buf_size) == blk_crc;
81 * For checkpoint manager
88 /* for the list of orphan inodes */
89 struct orphan_inode_entry {
90 struct list_head list; /* list head */
91 nid_t ino; /* inode number */
94 /* for the list of directory inodes */
95 struct dir_inode_entry {
96 struct list_head list; /* list head */
97 struct inode *inode; /* vfs inode pointer */
100 /* for the list of blockaddresses to be discarded */
101 struct discard_entry {
102 struct list_head list; /* list head */
103 block_t blkaddr; /* block address to be discarded */
104 int len; /* # of consecutive blocks of the discard */
107 /* for the list of fsync inodes, used only during recovery */
108 struct fsync_inode_entry {
109 struct list_head list; /* list head */
110 struct inode *inode; /* vfs inode pointer */
111 block_t blkaddr; /* block address locating the last inode */
114 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
115 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
117 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
118 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
119 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
120 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
122 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
124 int before = nats_in_cursum(rs);
125 rs->n_nats = cpu_to_le16(before + i);
129 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
131 int before = sits_in_cursum(rs);
132 rs->n_sits = cpu_to_le16(before + i);
139 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
140 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
142 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
144 * ioctl commands in 32 bit emulation
146 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
147 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
151 * For INODE and NODE manager
154 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
155 * as its node offset to distinguish from index node blocks.
156 * But some bits are used to mark the node block.
158 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
161 ALLOC_NODE, /* allocate a new node page if needed */
162 LOOKUP_NODE, /* look up a node without readahead */
164 * look up a node with readahead called
165 * by get_datablock_ro.
169 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
171 /* for in-memory extent cache entry */
172 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
175 rwlock_t ext_lock; /* rwlock for consistency */
176 unsigned int fofs; /* start offset in a file */
177 u32 blk_addr; /* start block address of the extent */
178 unsigned int len; /* length of the extent */
182 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
184 #define FADVISE_COLD_BIT 0x01
185 #define FADVISE_LOST_PINO_BIT 0x02
187 struct f2fs_inode_info {
188 struct inode vfs_inode; /* serve a vfs inode */
189 unsigned long i_flags; /* keep an inode flags for ioctl */
190 unsigned char i_advise; /* use to give file attribute hints */
191 unsigned int i_current_depth; /* use only in directory structure */
192 unsigned int i_pino; /* parent inode number */
193 umode_t i_acl_mode; /* keep file acl mode temporarily */
195 /* Use below internally in f2fs*/
196 unsigned long flags; /* use to pass per-file flags */
197 atomic_t dirty_dents; /* # of dirty dentry pages */
198 f2fs_hash_t chash; /* hash value of given file name */
199 unsigned int clevel; /* maximum level of given file name */
200 nid_t i_xattr_nid; /* node id that contains xattrs */
201 unsigned long long xattr_ver; /* cp version of xattr modification */
202 struct extent_info ext; /* in-memory extent cache entry */
205 static inline void get_extent_info(struct extent_info *ext,
206 struct f2fs_extent i_ext)
208 write_lock(&ext->ext_lock);
209 ext->fofs = le32_to_cpu(i_ext.fofs);
210 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
211 ext->len = le32_to_cpu(i_ext.len);
212 write_unlock(&ext->ext_lock);
215 static inline void set_raw_extent(struct extent_info *ext,
216 struct f2fs_extent *i_ext)
218 read_lock(&ext->ext_lock);
219 i_ext->fofs = cpu_to_le32(ext->fofs);
220 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
221 i_ext->len = cpu_to_le32(ext->len);
222 read_unlock(&ext->ext_lock);
225 struct f2fs_nm_info {
226 block_t nat_blkaddr; /* base disk address of NAT */
227 nid_t max_nid; /* maximum possible node ids */
228 nid_t next_scan_nid; /* the next nid to be scanned */
230 /* NAT cache management */
231 struct radix_tree_root nat_root;/* root of the nat entry cache */
232 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
233 unsigned int nat_cnt; /* the # of cached nat entries */
234 struct list_head nat_entries; /* cached nat entry list (clean) */
235 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
237 /* free node ids management */
238 struct list_head free_nid_list; /* a list for free nids */
239 spinlock_t free_nid_list_lock; /* protect free nid list */
240 unsigned int fcnt; /* the number of free node id */
241 struct mutex build_lock; /* lock for build free nids */
244 char *nat_bitmap; /* NAT bitmap pointer */
245 int bitmap_size; /* bitmap size */
249 * this structure is used as one of function parameters.
250 * all the information are dedicated to a given direct node block determined
251 * by the data offset in a file.
253 struct dnode_of_data {
254 struct inode *inode; /* vfs inode pointer */
255 struct page *inode_page; /* its inode page, NULL is possible */
256 struct page *node_page; /* cached direct node page */
257 nid_t nid; /* node id of the direct node block */
258 unsigned int ofs_in_node; /* data offset in the node page */
259 bool inode_page_locked; /* inode page is locked or not */
260 block_t data_blkaddr; /* block address of the node block */
263 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
264 struct page *ipage, struct page *npage, nid_t nid)
266 memset(dn, 0, sizeof(*dn));
268 dn->inode_page = ipage;
269 dn->node_page = npage;
276 * By default, there are 6 active log areas across the whole main area.
277 * When considering hot and cold data separation to reduce cleaning overhead,
278 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
280 * In the current design, you should not change the numbers intentionally.
281 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
282 * logs individually according to the underlying devices. (default: 6)
283 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
284 * data and 8 for node logs.
286 #define NR_CURSEG_DATA_TYPE (3)
287 #define NR_CURSEG_NODE_TYPE (3)
288 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
291 CURSEG_HOT_DATA = 0, /* directory entry blocks */
292 CURSEG_WARM_DATA, /* data blocks */
293 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
294 CURSEG_HOT_NODE, /* direct node blocks of directory files */
295 CURSEG_WARM_NODE, /* direct node blocks of normal files */
296 CURSEG_COLD_NODE, /* indirect node blocks */
300 struct f2fs_sm_info {
301 struct sit_info *sit_info; /* whole segment information */
302 struct free_segmap_info *free_info; /* free segment information */
303 struct dirty_seglist_info *dirty_info; /* dirty segment information */
304 struct curseg_info *curseg_array; /* active segment information */
306 struct list_head wblist_head; /* list of under-writeback pages */
307 spinlock_t wblist_lock; /* lock for checkpoint */
309 block_t seg0_blkaddr; /* block address of 0'th segment */
310 block_t main_blkaddr; /* start block address of main area */
311 block_t ssa_blkaddr; /* start block address of SSA area */
313 unsigned int segment_count; /* total # of segments */
314 unsigned int main_segments; /* # of segments in main area */
315 unsigned int reserved_segments; /* # of reserved segments */
316 unsigned int ovp_segments; /* # of overprovision segments */
318 /* a threshold to reclaim prefree segments */
319 unsigned int rec_prefree_segments;
321 /* for small discard management */
322 struct list_head discard_list; /* 4KB discard list */
323 int nr_discards; /* # of discards in the list */
324 int max_discards; /* max. discards to be issued */
331 * COUNT_TYPE for monitoring
333 * f2fs monitors the number of several block types such as on-writeback,
334 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
345 * The below are the page types of bios used in submti_bio().
346 * The available types are:
347 * DATA User data pages. It operates as async mode.
348 * NODE Node pages. It operates as async mode.
349 * META FS metadata pages such as SIT, NAT, CP.
350 * NR_PAGE_TYPE The number of page types.
351 * META_FLUSH Make sure the previous pages are written
352 * with waiting the bio's completion
353 * ... Only can be used with META.
355 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
364 struct f2fs_bio_info {
365 struct bio *bio; /* bios to merge */
366 sector_t last_block_in_bio; /* last block number */
367 struct mutex io_mutex; /* mutex for bio */
370 struct f2fs_sb_info {
371 struct super_block *sb; /* pointer to VFS super block */
372 struct proc_dir_entry *s_proc; /* proc entry */
373 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
374 struct f2fs_super_block *raw_super; /* raw super block pointer */
375 int s_dirty; /* dirty flag for checkpoint */
377 /* for node-related operations */
378 struct f2fs_nm_info *nm_info; /* node manager */
379 struct inode *node_inode; /* cache node blocks */
381 /* for segment-related operations */
382 struct f2fs_sm_info *sm_info; /* segment manager */
384 /* for bio operations */
385 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
388 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
389 struct inode *meta_inode; /* cache meta blocks */
390 struct mutex cp_mutex; /* checkpoint procedure lock */
391 struct rw_semaphore cp_rwsem; /* blocking FS operations */
392 struct mutex node_write; /* locking node writes */
393 struct mutex writepages; /* mutex for writepages() */
394 bool por_doing; /* recovery is doing or not */
395 bool on_build_free_nids; /* build_free_nids is doing */
396 wait_queue_head_t cp_wait;
398 /* for orphan inode management */
399 struct list_head orphan_inode_list; /* orphan inode list */
400 struct mutex orphan_inode_mutex; /* for orphan inode list */
401 unsigned int n_orphans; /* # of orphan inodes */
403 /* for directory inode management */
404 struct list_head dir_inode_list; /* dir inode list */
405 spinlock_t dir_inode_lock; /* for dir inode list lock */
407 /* basic file system units */
408 unsigned int log_sectors_per_block; /* log2 sectors per block */
409 unsigned int log_blocksize; /* log2 block size */
410 unsigned int blocksize; /* block size */
411 unsigned int root_ino_num; /* root inode number*/
412 unsigned int node_ino_num; /* node inode number*/
413 unsigned int meta_ino_num; /* meta inode number*/
414 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
415 unsigned int blocks_per_seg; /* blocks per segment */
416 unsigned int segs_per_sec; /* segments per section */
417 unsigned int secs_per_zone; /* sections per zone */
418 unsigned int total_sections; /* total section count */
419 unsigned int total_node_count; /* total node block count */
420 unsigned int total_valid_node_count; /* valid node block count */
421 unsigned int total_valid_inode_count; /* valid inode count */
422 int active_logs; /* # of active logs */
424 block_t user_block_count; /* # of user blocks */
425 block_t total_valid_block_count; /* # of valid blocks */
426 block_t alloc_valid_block_count; /* # of allocated blocks */
427 block_t last_valid_block_count; /* for recovery */
428 u32 s_next_generation; /* for NFS support */
429 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
431 struct f2fs_mount_info mount_opt; /* mount options */
433 /* for cleaning operations */
434 struct mutex gc_mutex; /* mutex for GC */
435 struct f2fs_gc_kthread *gc_thread; /* GC thread */
436 unsigned int cur_victim_sec; /* current victim section num */
439 * for stat information.
440 * one is for the LFS mode, and the other is for the SSR mode.
442 #ifdef CONFIG_F2FS_STAT_FS
443 struct f2fs_stat_info *stat_info; /* FS status information */
444 unsigned int segment_count[2]; /* # of allocated segments */
445 unsigned int block_count[2]; /* # of allocated blocks */
446 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
447 int bg_gc; /* background gc calls */
448 unsigned int n_dirty_dirs; /* # of dir inodes */
450 unsigned int last_victim[2]; /* last victim segment # */
451 spinlock_t stat_lock; /* lock for stat operations */
453 /* For sysfs suppport */
454 struct kobject s_kobj;
455 struct completion s_kobj_unregister;
461 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
463 return container_of(inode, struct f2fs_inode_info, vfs_inode);
466 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
468 return sb->s_fs_info;
471 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
473 return (struct f2fs_super_block *)(sbi->raw_super);
476 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
478 return (struct f2fs_checkpoint *)(sbi->ckpt);
481 static inline struct f2fs_node *F2FS_NODE(struct page *page)
483 return (struct f2fs_node *)page_address(page);
486 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
488 return (struct f2fs_nm_info *)(sbi->nm_info);
491 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
493 return (struct f2fs_sm_info *)(sbi->sm_info);
496 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
498 return (struct sit_info *)(SM_I(sbi)->sit_info);
501 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
503 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
506 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
508 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
511 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
516 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
521 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
523 return le64_to_cpu(cp->checkpoint_ver);
526 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
528 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
529 return ckpt_flags & f;
532 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
534 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
536 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
539 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
541 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
543 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
546 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
548 down_read(&sbi->cp_rwsem);
551 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
553 up_read(&sbi->cp_rwsem);
556 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
558 down_write_nest_lock(&sbi->cp_rwsem, &sbi->cp_mutex);
561 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
563 up_write(&sbi->cp_rwsem);
567 * Check whether the given nid is within node id range.
569 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
571 WARN_ON((nid >= NM_I(sbi)->max_nid));
572 if (nid >= NM_I(sbi)->max_nid)
577 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
580 * Check whether the inode has blocks or not
582 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
584 if (F2FS_I(inode)->i_xattr_nid)
585 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
587 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
590 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
591 struct inode *inode, blkcnt_t count)
593 block_t valid_block_count;
595 spin_lock(&sbi->stat_lock);
597 sbi->total_valid_block_count + (block_t)count;
598 if (valid_block_count > sbi->user_block_count) {
599 spin_unlock(&sbi->stat_lock);
602 inode->i_blocks += count;
603 sbi->total_valid_block_count = valid_block_count;
604 sbi->alloc_valid_block_count += (block_t)count;
605 spin_unlock(&sbi->stat_lock);
609 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
613 spin_lock(&sbi->stat_lock);
614 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
615 f2fs_bug_on(inode->i_blocks < count);
616 inode->i_blocks -= count;
617 sbi->total_valid_block_count -= (block_t)count;
618 spin_unlock(&sbi->stat_lock);
621 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
623 atomic_inc(&sbi->nr_pages[count_type]);
624 F2FS_SET_SB_DIRT(sbi);
627 static inline void inode_inc_dirty_dents(struct inode *inode)
629 atomic_inc(&F2FS_I(inode)->dirty_dents);
632 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
634 atomic_dec(&sbi->nr_pages[count_type]);
637 static inline void inode_dec_dirty_dents(struct inode *inode)
639 atomic_dec(&F2FS_I(inode)->dirty_dents);
642 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
644 return atomic_read(&sbi->nr_pages[count_type]);
647 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
649 unsigned int pages_per_sec = sbi->segs_per_sec *
650 (1 << sbi->log_blocks_per_seg);
651 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
652 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
655 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
658 spin_lock(&sbi->stat_lock);
659 ret = sbi->total_valid_block_count;
660 spin_unlock(&sbi->stat_lock);
664 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
666 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
668 /* return NAT or SIT bitmap */
669 if (flag == NAT_BITMAP)
670 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
671 else if (flag == SIT_BITMAP)
672 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
677 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
679 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
680 int offset = (flag == NAT_BITMAP) ?
681 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
682 return &ckpt->sit_nat_version_bitmap + offset;
685 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
688 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
689 unsigned long long ckpt_version = cur_cp_version(ckpt);
691 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
694 * odd numbered checkpoint should at cp segment 0
695 * and even segent must be at cp segment 1
697 if (!(ckpt_version & 1))
698 start_addr += sbi->blocks_per_seg;
703 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
705 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
708 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
711 block_t valid_block_count;
712 unsigned int valid_node_count;
714 spin_lock(&sbi->stat_lock);
716 valid_block_count = sbi->total_valid_block_count + 1;
717 if (valid_block_count > sbi->user_block_count) {
718 spin_unlock(&sbi->stat_lock);
722 valid_node_count = sbi->total_valid_node_count + 1;
723 if (valid_node_count > sbi->total_node_count) {
724 spin_unlock(&sbi->stat_lock);
731 sbi->alloc_valid_block_count++;
732 sbi->total_valid_node_count++;
733 sbi->total_valid_block_count++;
734 spin_unlock(&sbi->stat_lock);
739 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
742 spin_lock(&sbi->stat_lock);
744 f2fs_bug_on(!sbi->total_valid_block_count);
745 f2fs_bug_on(!sbi->total_valid_node_count);
746 f2fs_bug_on(!inode->i_blocks);
749 sbi->total_valid_node_count--;
750 sbi->total_valid_block_count--;
752 spin_unlock(&sbi->stat_lock);
755 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
758 spin_lock(&sbi->stat_lock);
759 ret = sbi->total_valid_node_count;
760 spin_unlock(&sbi->stat_lock);
764 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
766 spin_lock(&sbi->stat_lock);
767 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
768 sbi->total_valid_inode_count++;
769 spin_unlock(&sbi->stat_lock);
772 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
774 spin_lock(&sbi->stat_lock);
775 f2fs_bug_on(!sbi->total_valid_inode_count);
776 sbi->total_valid_inode_count--;
777 spin_unlock(&sbi->stat_lock);
781 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
784 spin_lock(&sbi->stat_lock);
785 ret = sbi->total_valid_inode_count;
786 spin_unlock(&sbi->stat_lock);
790 static inline void f2fs_put_page(struct page *page, int unlock)
792 if (!page || IS_ERR(page))
796 f2fs_bug_on(!PageLocked(page));
799 page_cache_release(page);
802 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
805 f2fs_put_page(dn->node_page, 1);
806 if (dn->inode_page && dn->node_page != dn->inode_page)
807 f2fs_put_page(dn->inode_page, 0);
808 dn->node_page = NULL;
809 dn->inode_page = NULL;
812 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
813 size_t size, void (*ctor)(void *))
815 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
818 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
823 entry = kmem_cache_alloc(cachep, flags);
832 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
834 static inline bool IS_INODE(struct page *page)
836 struct f2fs_node *p = F2FS_NODE(page);
837 return RAW_IS_INODE(p);
840 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
842 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
845 static inline block_t datablock_addr(struct page *node_page,
848 struct f2fs_node *raw_node;
850 raw_node = F2FS_NODE(node_page);
851 addr_array = blkaddr_in_node(raw_node);
852 return le32_to_cpu(addr_array[offset]);
855 static inline int f2fs_test_bit(unsigned int nr, char *addr)
860 mask = 1 << (7 - (nr & 0x07));
864 static inline int f2fs_set_bit(unsigned int nr, char *addr)
870 mask = 1 << (7 - (nr & 0x07));
876 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
882 mask = 1 << (7 - (nr & 0x07));
888 /* used for f2fs_inode_info->flags */
890 FI_NEW_INODE, /* indicate newly allocated inode */
891 FI_DIRTY_INODE, /* indicate inode is dirty or not */
892 FI_INC_LINK, /* need to increment i_nlink */
893 FI_ACL_MODE, /* indicate acl mode */
894 FI_NO_ALLOC, /* should not allocate any blocks */
895 FI_UPDATE_DIR, /* should update inode block for consistency */
896 FI_DELAY_IPUT, /* used for the recovery */
897 FI_NO_EXTENT, /* not to use the extent cache */
898 FI_INLINE_XATTR, /* used for inline xattr */
901 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
903 set_bit(flag, &fi->flags);
906 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
908 return test_bit(flag, &fi->flags);
911 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
913 clear_bit(flag, &fi->flags);
916 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
918 fi->i_acl_mode = mode;
919 set_inode_flag(fi, FI_ACL_MODE);
922 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
924 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
925 clear_inode_flag(fi, FI_ACL_MODE);
931 static inline void get_inline_info(struct f2fs_inode_info *fi,
932 struct f2fs_inode *ri)
934 if (ri->i_inline & F2FS_INLINE_XATTR)
935 set_inode_flag(fi, FI_INLINE_XATTR);
938 static inline void set_raw_inline(struct f2fs_inode_info *fi,
939 struct f2fs_inode *ri)
943 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
944 ri->i_inline |= F2FS_INLINE_XATTR;
947 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
949 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
950 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
951 return DEF_ADDRS_PER_INODE;
954 static inline void *inline_xattr_addr(struct page *page)
956 struct f2fs_inode *ri;
957 ri = (struct f2fs_inode *)page_address(page);
958 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
959 F2FS_INLINE_XATTR_ADDRS]);
962 static inline int inline_xattr_size(struct inode *inode)
964 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
965 return F2FS_INLINE_XATTR_ADDRS << 2;
970 static inline int f2fs_readonly(struct super_block *sb)
972 return sb->s_flags & MS_RDONLY;
978 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
979 void truncate_data_blocks(struct dnode_of_data *);
980 void f2fs_truncate(struct inode *);
981 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
982 int f2fs_setattr(struct dentry *, struct iattr *);
983 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
984 int truncate_data_blocks_range(struct dnode_of_data *, int);
985 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
986 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
991 void f2fs_set_inode_flags(struct inode *);
992 struct inode *f2fs_iget(struct super_block *, unsigned long);
993 int try_to_free_nats(struct f2fs_sb_info *, int);
994 void update_inode(struct inode *, struct page *);
995 int update_inode_page(struct inode *);
996 int f2fs_write_inode(struct inode *, struct writeback_control *);
997 void f2fs_evict_inode(struct inode *);
1002 struct dentry *f2fs_get_parent(struct dentry *child);
1007 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1009 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1010 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1011 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1012 struct page *, struct inode *);
1013 int update_dent_inode(struct inode *, const struct qstr *);
1014 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
1015 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1016 int f2fs_make_empty(struct inode *, struct inode *);
1017 bool f2fs_empty_dir(struct inode *);
1019 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1021 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1028 int f2fs_sync_fs(struct super_block *, int);
1029 extern __printf(3, 4)
1030 void f2fs_msg(struct super_block *, const char *, const char *, ...);
1035 f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
1040 struct dnode_of_data;
1043 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1044 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1045 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1046 int truncate_inode_blocks(struct inode *, pgoff_t);
1047 int truncate_xattr_node(struct inode *, struct page *);
1048 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1049 void remove_inode_page(struct inode *);
1050 struct page *new_inode_page(struct inode *, const struct qstr *);
1051 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1052 void ra_node_page(struct f2fs_sb_info *, nid_t);
1053 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1054 struct page *get_node_page_ra(struct page *, int);
1055 void sync_inode_page(struct dnode_of_data *);
1056 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1057 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1058 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1059 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1060 void recover_node_page(struct f2fs_sb_info *, struct page *,
1061 struct f2fs_summary *, struct node_info *, block_t);
1062 int recover_inode_page(struct f2fs_sb_info *, struct page *);
1063 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1064 struct f2fs_summary_block *);
1065 void flush_nat_entries(struct f2fs_sb_info *);
1066 int build_node_manager(struct f2fs_sb_info *);
1067 void destroy_node_manager(struct f2fs_sb_info *);
1068 int __init create_node_manager_caches(void);
1069 void destroy_node_manager_caches(void);
1074 void f2fs_balance_fs(struct f2fs_sb_info *);
1075 void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1076 void invalidate_blocks(struct f2fs_sb_info *, block_t);
1077 void clear_prefree_segments(struct f2fs_sb_info *);
1078 int npages_for_summary_flush(struct f2fs_sb_info *);
1079 void allocate_new_segments(struct f2fs_sb_info *);
1080 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1081 struct bio *f2fs_bio_alloc(struct block_device *, int);
1082 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool);
1083 void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
1084 void write_meta_page(struct f2fs_sb_info *, struct page *);
1085 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1086 block_t, block_t *);
1087 void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
1088 block_t, block_t *);
1089 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
1090 void recover_data_page(struct f2fs_sb_info *, struct page *,
1091 struct f2fs_summary *, block_t, block_t);
1092 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1093 struct f2fs_summary *, block_t, block_t);
1094 void write_data_summaries(struct f2fs_sb_info *, block_t);
1095 void write_node_summaries(struct f2fs_sb_info *, block_t);
1096 int lookup_journal_in_cursum(struct f2fs_summary_block *,
1097 int, unsigned int, int);
1098 void flush_sit_entries(struct f2fs_sb_info *);
1099 int build_segment_manager(struct f2fs_sb_info *);
1100 void destroy_segment_manager(struct f2fs_sb_info *);
1101 int __init create_segment_manager_caches(void);
1102 void destroy_segment_manager_caches(void);
1107 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1108 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1109 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1110 int acquire_orphan_inode(struct f2fs_sb_info *);
1111 void release_orphan_inode(struct f2fs_sb_info *);
1112 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1113 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1114 int recover_orphan_inodes(struct f2fs_sb_info *);
1115 int get_valid_checkpoint(struct f2fs_sb_info *);
1116 void set_dirty_dir_page(struct inode *, struct page *);
1117 void add_dirty_dir_inode(struct inode *);
1118 void remove_dirty_dir_inode(struct inode *);
1119 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
1120 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1121 void write_checkpoint(struct f2fs_sb_info *, bool);
1122 void init_orphan_info(struct f2fs_sb_info *);
1123 int __init create_checkpoint_caches(void);
1124 void destroy_checkpoint_caches(void);
1129 int reserve_new_block(struct dnode_of_data *);
1130 void update_extent_cache(block_t, struct dnode_of_data *);
1131 struct page *find_data_page(struct inode *, pgoff_t, bool);
1132 struct page *get_lock_data_page(struct inode *, pgoff_t);
1133 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1134 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
1135 int do_write_data_page(struct page *);
1140 int start_gc_thread(struct f2fs_sb_info *);
1141 void stop_gc_thread(struct f2fs_sb_info *);
1142 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
1143 int f2fs_gc(struct f2fs_sb_info *);
1144 void build_gc_manager(struct f2fs_sb_info *);
1145 int __init create_gc_caches(void);
1146 void destroy_gc_caches(void);
1151 int recover_fsync_data(struct f2fs_sb_info *);
1152 bool space_for_roll_forward(struct f2fs_sb_info *);
1157 #ifdef CONFIG_F2FS_STAT_FS
1158 struct f2fs_stat_info {
1159 struct list_head stat_list;
1160 struct f2fs_sb_info *sbi;
1161 struct mutex stat_lock;
1162 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1163 int main_area_segs, main_area_sections, main_area_zones;
1164 int hit_ext, total_ext;
1165 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1166 int nats, sits, fnids;
1167 int total_count, utilization;
1169 unsigned int valid_count, valid_node_count, valid_inode_count;
1170 unsigned int bimodal, avg_vblocks;
1171 int util_free, util_valid, util_invalid;
1172 int rsvd_segs, overp_segs;
1173 int dirty_count, node_pages, meta_pages;
1174 int prefree_count, call_count;
1175 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1176 int tot_blks, data_blks, node_blks;
1177 int curseg[NR_CURSEG_TYPE];
1178 int cursec[NR_CURSEG_TYPE];
1179 int curzone[NR_CURSEG_TYPE];
1181 unsigned int segment_count[2];
1182 unsigned int block_count[2];
1183 unsigned base_mem, cache_mem;
1186 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1188 return (struct f2fs_stat_info*)sbi->stat_info;
1191 #define stat_inc_call_count(si) ((si)->call_count++)
1192 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1193 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1194 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1195 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1196 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1197 #define stat_inc_seg_type(sbi, curseg) \
1198 ((sbi)->segment_count[(curseg)->alloc_type]++)
1199 #define stat_inc_block_count(sbi, curseg) \
1200 ((sbi)->block_count[(curseg)->alloc_type]++)
1202 #define stat_inc_seg_count(sbi, type) \
1204 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1206 if (type == SUM_TYPE_DATA) \
1212 #define stat_inc_tot_blk_count(si, blks) \
1213 (si->tot_blks += (blks))
1215 #define stat_inc_data_blk_count(sbi, blks) \
1217 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1218 stat_inc_tot_blk_count(si, blks); \
1219 si->data_blks += (blks); \
1222 #define stat_inc_node_blk_count(sbi, blks) \
1224 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1225 stat_inc_tot_blk_count(si, blks); \
1226 si->node_blks += (blks); \
1229 int f2fs_build_stats(struct f2fs_sb_info *);
1230 void f2fs_destroy_stats(struct f2fs_sb_info *);
1231 void __init f2fs_create_root_stats(void);
1232 void f2fs_destroy_root_stats(void);
1234 #define stat_inc_call_count(si)
1235 #define stat_inc_bggc_count(si)
1236 #define stat_inc_dirty_dir(sbi)
1237 #define stat_dec_dirty_dir(sbi)
1238 #define stat_inc_total_hit(sb)
1239 #define stat_inc_read_hit(sb)
1240 #define stat_inc_seg_type(sbi, curseg)
1241 #define stat_inc_block_count(sbi, curseg)
1242 #define stat_inc_seg_count(si, type)
1243 #define stat_inc_tot_blk_count(si, blks)
1244 #define stat_inc_data_blk_count(si, blks)
1245 #define stat_inc_node_blk_count(sbi, blks)
1247 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1248 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1249 static inline void __init f2fs_create_root_stats(void) { }
1250 static inline void f2fs_destroy_root_stats(void) { }
1253 extern const struct file_operations f2fs_dir_operations;
1254 extern const struct file_operations f2fs_file_operations;
1255 extern const struct inode_operations f2fs_file_inode_operations;
1256 extern const struct address_space_operations f2fs_dblock_aops;
1257 extern const struct address_space_operations f2fs_node_aops;
1258 extern const struct address_space_operations f2fs_meta_aops;
1259 extern const struct inode_operations f2fs_dir_inode_operations;
1260 extern const struct inode_operations f2fs_symlink_inode_operations;
1261 extern const struct inode_operations f2fs_special_inode_operations;