4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
14 #include <linux/types.h>
15 #include <linux/page-flags.h>
16 #include <linux/buffer_head.h>
17 #include <linux/slab.h>
18 #include <linux/crc32.h>
19 #include <linux/magic.h>
24 #define F2FS_MOUNT_BG_GC 0x00000001
25 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
26 #define F2FS_MOUNT_DISCARD 0x00000004
27 #define F2FS_MOUNT_NOHEAP 0x00000008
28 #define F2FS_MOUNT_XATTR_USER 0x00000010
29 #define F2FS_MOUNT_POSIX_ACL 0x00000020
30 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
32 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
33 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
34 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
36 #define ver_after(a, b) (typecheck(unsigned long long, a) && \
37 typecheck(unsigned long long, b) && \
38 ((long long)((a) - (b)) > 0))
43 struct f2fs_mount_info {
47 static inline __u32 f2fs_crc32(void *buff, size_t len)
49 return crc32_le(F2FS_SUPER_MAGIC, buff, len);
52 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size)
54 return f2fs_crc32(buff, buff_size) == blk_crc;
58 * For checkpoint manager
65 /* for the list of orphan inodes */
66 struct orphan_inode_entry {
67 struct list_head list; /* list head */
68 nid_t ino; /* inode number */
71 /* for the list of directory inodes */
72 struct dir_inode_entry {
73 struct list_head list; /* list head */
74 struct inode *inode; /* vfs inode pointer */
77 /* for the list of fsync inodes, used only during recovery */
78 struct fsync_inode_entry {
79 struct list_head list; /* list head */
80 struct inode *inode; /* vfs inode pointer */
81 block_t blkaddr; /* block address locating the last inode */
84 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
85 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
87 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
88 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
89 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
90 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
92 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
94 int before = nats_in_cursum(rs);
95 rs->n_nats = cpu_to_le16(before + i);
99 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
101 int before = sits_in_cursum(rs);
102 rs->n_sits = cpu_to_le16(before + i);
107 * For INODE and NODE manager
109 #define XATTR_NODE_OFFSET (-1) /*
110 * store xattrs to one node block per
111 * file keeping -1 as its node offset to
112 * distinguish from index node blocks.
114 #define RDONLY_NODE 1 /*
115 * specify a read-only mode when getting
116 * a node block. 0 is read-write mode.
117 * used by get_dnode_of_data().
119 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
121 /* for in-memory extent cache entry */
123 rwlock_t ext_lock; /* rwlock for consistency */
124 unsigned int fofs; /* start offset in a file */
125 u32 blk_addr; /* start block address of the extent */
126 unsigned int len; /* lenth of the extent */
130 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
132 #define FADVISE_COLD_BIT 0x01
134 struct f2fs_inode_info {
135 struct inode vfs_inode; /* serve a vfs inode */
136 unsigned long i_flags; /* keep an inode flags for ioctl */
137 unsigned char i_advise; /* use to give file attribute hints */
138 unsigned int i_current_depth; /* use only in directory structure */
139 umode_t i_acl_mode; /* keep file acl mode temporarily */
141 /* Use below internally in f2fs*/
142 unsigned long flags; /* use to pass per-file flags */
143 unsigned long long data_version;/* lastes version of data for fsync */
144 atomic_t dirty_dents; /* # of dirty dentry pages */
145 f2fs_hash_t chash; /* hash value of given file name */
146 unsigned int clevel; /* maximum level of given file name */
147 nid_t i_xattr_nid; /* node id that contains xattrs */
148 struct extent_info ext; /* in-memory extent cache entry */
151 static inline void get_extent_info(struct extent_info *ext,
152 struct f2fs_extent i_ext)
154 write_lock(&ext->ext_lock);
155 ext->fofs = le32_to_cpu(i_ext.fofs);
156 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
157 ext->len = le32_to_cpu(i_ext.len);
158 write_unlock(&ext->ext_lock);
161 static inline void set_raw_extent(struct extent_info *ext,
162 struct f2fs_extent *i_ext)
164 read_lock(&ext->ext_lock);
165 i_ext->fofs = cpu_to_le32(ext->fofs);
166 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
167 i_ext->len = cpu_to_le32(ext->len);
168 read_unlock(&ext->ext_lock);
171 struct f2fs_nm_info {
172 block_t nat_blkaddr; /* base disk address of NAT */
173 nid_t max_nid; /* maximum possible node ids */
174 nid_t init_scan_nid; /* the first nid to be scanned */
175 nid_t next_scan_nid; /* the next nid to be scanned */
177 /* NAT cache management */
178 struct radix_tree_root nat_root;/* root of the nat entry cache */
179 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
180 unsigned int nat_cnt; /* the # of cached nat entries */
181 struct list_head nat_entries; /* cached nat entry list (clean) */
182 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
184 /* free node ids management */
185 struct list_head free_nid_list; /* a list for free nids */
186 spinlock_t free_nid_list_lock; /* protect free nid list */
187 unsigned int fcnt; /* the number of free node id */
188 struct mutex build_lock; /* lock for build free nids */
191 char *nat_bitmap; /* NAT bitmap pointer */
192 int bitmap_size; /* bitmap size */
196 * this structure is used as one of function parameters.
197 * all the information are dedicated to a given direct node block determined
198 * by the data offset in a file.
200 struct dnode_of_data {
201 struct inode *inode; /* vfs inode pointer */
202 struct page *inode_page; /* its inode page, NULL is possible */
203 struct page *node_page; /* cached direct node page */
204 nid_t nid; /* node id of the direct node block */
205 unsigned int ofs_in_node; /* data offset in the node page */
206 bool inode_page_locked; /* inode page is locked or not */
207 block_t data_blkaddr; /* block address of the node block */
210 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
211 struct page *ipage, struct page *npage, nid_t nid)
214 dn->inode_page = ipage;
215 dn->node_page = npage;
217 dn->inode_page_locked = 0;
223 * By default, there are 6 active log areas across the whole main area.
224 * When considering hot and cold data separation to reduce cleaning overhead,
225 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
227 * In the current design, you should not change the numbers intentionally.
228 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
229 * logs individually according to the underlying devices. (default: 6)
230 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
231 * data and 8 for node logs.
233 #define NR_CURSEG_DATA_TYPE (3)
234 #define NR_CURSEG_NODE_TYPE (3)
235 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
238 CURSEG_HOT_DATA = 0, /* directory entry blocks */
239 CURSEG_WARM_DATA, /* data blocks */
240 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
241 CURSEG_HOT_NODE, /* direct node blocks of directory files */
242 CURSEG_WARM_NODE, /* direct node blocks of normal files */
243 CURSEG_COLD_NODE, /* indirect node blocks */
247 struct f2fs_sm_info {
248 struct sit_info *sit_info; /* whole segment information */
249 struct free_segmap_info *free_info; /* free segment information */
250 struct dirty_seglist_info *dirty_info; /* dirty segment information */
251 struct curseg_info *curseg_array; /* active segment information */
253 struct list_head wblist_head; /* list of under-writeback pages */
254 spinlock_t wblist_lock; /* lock for checkpoint */
256 block_t seg0_blkaddr; /* block address of 0'th segment */
257 block_t main_blkaddr; /* start block address of main area */
258 block_t ssa_blkaddr; /* start block address of SSA area */
260 unsigned int segment_count; /* total # of segments */
261 unsigned int main_segments; /* # of segments in main area */
262 unsigned int reserved_segments; /* # of reserved segments */
263 unsigned int ovp_segments; /* # of overprovision segments */
267 * For directory operation
269 #define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
270 #define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
271 #define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
272 #define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
273 #define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
279 * COUNT_TYPE for monitoring
281 * f2fs monitors the number of several block types such as on-writeback,
282 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
293 * FS_LOCK nesting subclasses for the lock validator:
295 * The locking order between these classes is
296 * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW
297 * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC
300 RENAME, /* for renaming operations */
301 DENTRY_OPS, /* for directory operations */
302 DATA_WRITE, /* for data write */
303 DATA_NEW, /* for data allocation */
304 DATA_TRUNC, /* for data truncate */
305 NODE_NEW, /* for node allocation */
306 NODE_TRUNC, /* for node truncate */
307 NODE_WRITE, /* for node write */
312 * The below are the page types of bios used in submti_bio().
313 * The available types are:
314 * DATA User data pages. It operates as async mode.
315 * NODE Node pages. It operates as async mode.
316 * META FS metadata pages such as SIT, NAT, CP.
317 * NR_PAGE_TYPE The number of page types.
318 * META_FLUSH Make sure the previous pages are written
319 * with waiting the bio's completion
320 * ... Only can be used with META.
330 struct f2fs_sb_info {
331 struct super_block *sb; /* pointer to VFS super block */
332 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
333 struct f2fs_super_block *raw_super; /* raw super block pointer */
334 int s_dirty; /* dirty flag for checkpoint */
336 /* for node-related operations */
337 struct f2fs_nm_info *nm_info; /* node manager */
338 struct inode *node_inode; /* cache node blocks */
340 /* for segment-related operations */
341 struct f2fs_sm_info *sm_info; /* segment manager */
342 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */
343 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */
344 struct rw_semaphore bio_sem; /* IO semaphore */
347 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
348 struct inode *meta_inode; /* cache meta blocks */
349 struct mutex cp_mutex; /* for checkpoint procedure */
350 struct mutex fs_lock[NR_LOCK_TYPE]; /* for blocking FS operations */
351 struct mutex write_inode; /* mutex for write inode */
352 struct mutex writepages; /* mutex for writepages() */
353 int por_doing; /* recovery is doing or not */
355 /* for orphan inode management */
356 struct list_head orphan_inode_list; /* orphan inode list */
357 struct mutex orphan_inode_mutex; /* for orphan inode list */
358 unsigned int n_orphans; /* # of orphan inodes */
360 /* for directory inode management */
361 struct list_head dir_inode_list; /* dir inode list */
362 spinlock_t dir_inode_lock; /* for dir inode list lock */
363 unsigned int n_dirty_dirs; /* # of dir inodes */
365 /* basic file system units */
366 unsigned int log_sectors_per_block; /* log2 sectors per block */
367 unsigned int log_blocksize; /* log2 block size */
368 unsigned int blocksize; /* block size */
369 unsigned int root_ino_num; /* root inode number*/
370 unsigned int node_ino_num; /* node inode number*/
371 unsigned int meta_ino_num; /* meta inode number*/
372 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
373 unsigned int blocks_per_seg; /* blocks per segment */
374 unsigned int segs_per_sec; /* segments per section */
375 unsigned int secs_per_zone; /* sections per zone */
376 unsigned int total_sections; /* total section count */
377 unsigned int total_node_count; /* total node block count */
378 unsigned int total_valid_node_count; /* valid node block count */
379 unsigned int total_valid_inode_count; /* valid inode count */
380 int active_logs; /* # of active logs */
382 block_t user_block_count; /* # of user blocks */
383 block_t total_valid_block_count; /* # of valid blocks */
384 block_t alloc_valid_block_count; /* # of allocated blocks */
385 block_t last_valid_block_count; /* for recovery */
386 u32 s_next_generation; /* for NFS support */
387 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
389 struct f2fs_mount_info mount_opt; /* mount options */
391 /* for cleaning operations */
392 struct mutex gc_mutex; /* mutex for GC */
393 struct f2fs_gc_kthread *gc_thread; /* GC thread */
396 * for stat information.
397 * one is for the LFS mode, and the other is for the SSR mode.
399 struct f2fs_stat_info *stat_info; /* FS status information */
400 unsigned int segment_count[2]; /* # of allocated segments */
401 unsigned int block_count[2]; /* # of allocated blocks */
402 unsigned int last_victim[2]; /* last victim segment # */
403 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
404 int bg_gc; /* background gc calls */
405 spinlock_t stat_lock; /* lock for stat operations */
411 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
413 return container_of(inode, struct f2fs_inode_info, vfs_inode);
416 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
418 return sb->s_fs_info;
421 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
423 return (struct f2fs_super_block *)(sbi->raw_super);
426 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
428 return (struct f2fs_checkpoint *)(sbi->ckpt);
431 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
433 return (struct f2fs_nm_info *)(sbi->nm_info);
436 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
438 return (struct f2fs_sm_info *)(sbi->sm_info);
441 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
443 return (struct sit_info *)(SM_I(sbi)->sit_info);
446 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
448 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
451 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
453 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
456 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
461 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
466 static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t)
468 mutex_lock_nested(&sbi->fs_lock[t], t);
471 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t)
473 mutex_unlock(&sbi->fs_lock[t]);
477 * Check whether the given nid is within node id range.
479 static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
481 BUG_ON((nid >= NM_I(sbi)->max_nid));
484 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
487 * Check whether the inode has blocks or not
489 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
491 if (F2FS_I(inode)->i_xattr_nid)
492 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
494 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
497 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
498 struct inode *inode, blkcnt_t count)
500 block_t valid_block_count;
502 spin_lock(&sbi->stat_lock);
504 sbi->total_valid_block_count + (block_t)count;
505 if (valid_block_count > sbi->user_block_count) {
506 spin_unlock(&sbi->stat_lock);
509 inode->i_blocks += count;
510 sbi->total_valid_block_count = valid_block_count;
511 sbi->alloc_valid_block_count += (block_t)count;
512 spin_unlock(&sbi->stat_lock);
516 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
520 spin_lock(&sbi->stat_lock);
521 BUG_ON(sbi->total_valid_block_count < (block_t) count);
522 BUG_ON(inode->i_blocks < count);
523 inode->i_blocks -= count;
524 sbi->total_valid_block_count -= (block_t)count;
525 spin_unlock(&sbi->stat_lock);
529 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
531 atomic_inc(&sbi->nr_pages[count_type]);
532 F2FS_SET_SB_DIRT(sbi);
535 static inline void inode_inc_dirty_dents(struct inode *inode)
537 atomic_inc(&F2FS_I(inode)->dirty_dents);
540 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
542 atomic_dec(&sbi->nr_pages[count_type]);
545 static inline void inode_dec_dirty_dents(struct inode *inode)
547 atomic_dec(&F2FS_I(inode)->dirty_dents);
550 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
552 return atomic_read(&sbi->nr_pages[count_type]);
555 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
558 spin_lock(&sbi->stat_lock);
559 ret = sbi->total_valid_block_count;
560 spin_unlock(&sbi->stat_lock);
564 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
566 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
568 /* return NAT or SIT bitmap */
569 if (flag == NAT_BITMAP)
570 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
571 else if (flag == SIT_BITMAP)
572 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
577 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
579 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
580 int offset = (flag == NAT_BITMAP) ? ckpt->sit_ver_bitmap_bytesize : 0;
581 return &ckpt->sit_nat_version_bitmap + offset;
584 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
587 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
588 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
590 start_addr = le64_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
593 * odd numbered checkpoint should at cp segment 0
594 * and even segent must be at cp segment 1
596 if (!(ckpt_version & 1))
597 start_addr += sbi->blocks_per_seg;
602 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
604 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
607 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
611 block_t valid_block_count;
612 unsigned int valid_node_count;
614 spin_lock(&sbi->stat_lock);
616 valid_block_count = sbi->total_valid_block_count + (block_t)count;
617 sbi->alloc_valid_block_count += (block_t)count;
618 valid_node_count = sbi->total_valid_node_count + count;
620 if (valid_block_count > sbi->user_block_count) {
621 spin_unlock(&sbi->stat_lock);
625 if (valid_node_count > sbi->total_node_count) {
626 spin_unlock(&sbi->stat_lock);
631 inode->i_blocks += count;
632 sbi->total_valid_node_count = valid_node_count;
633 sbi->total_valid_block_count = valid_block_count;
634 spin_unlock(&sbi->stat_lock);
639 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
643 spin_lock(&sbi->stat_lock);
645 BUG_ON(sbi->total_valid_block_count < count);
646 BUG_ON(sbi->total_valid_node_count < count);
647 BUG_ON(inode->i_blocks < count);
649 inode->i_blocks -= count;
650 sbi->total_valid_node_count -= count;
651 sbi->total_valid_block_count -= (block_t)count;
653 spin_unlock(&sbi->stat_lock);
656 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
659 spin_lock(&sbi->stat_lock);
660 ret = sbi->total_valid_node_count;
661 spin_unlock(&sbi->stat_lock);
665 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
667 spin_lock(&sbi->stat_lock);
668 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
669 sbi->total_valid_inode_count++;
670 spin_unlock(&sbi->stat_lock);
673 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
675 spin_lock(&sbi->stat_lock);
676 BUG_ON(!sbi->total_valid_inode_count);
677 sbi->total_valid_inode_count--;
678 spin_unlock(&sbi->stat_lock);
682 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
685 spin_lock(&sbi->stat_lock);
686 ret = sbi->total_valid_inode_count;
687 spin_unlock(&sbi->stat_lock);
691 static inline void f2fs_put_page(struct page *page, int unlock)
693 if (!page || IS_ERR(page))
697 BUG_ON(!PageLocked(page));
700 page_cache_release(page);
703 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
706 f2fs_put_page(dn->node_page, 1);
707 if (dn->inode_page && dn->node_page != dn->inode_page)
708 f2fs_put_page(dn->inode_page, 0);
709 dn->node_page = NULL;
710 dn->inode_page = NULL;
713 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
714 size_t size, void (*ctor)(void *))
716 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
719 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
721 static inline bool IS_INODE(struct page *page)
723 struct f2fs_node *p = (struct f2fs_node *)page_address(page);
724 return RAW_IS_INODE(p);
727 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
729 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
732 static inline block_t datablock_addr(struct page *node_page,
735 struct f2fs_node *raw_node;
737 raw_node = (struct f2fs_node *)page_address(node_page);
738 addr_array = blkaddr_in_node(raw_node);
739 return le32_to_cpu(addr_array[offset]);
742 static inline int f2fs_test_bit(unsigned int nr, char *addr)
747 mask = 1 << (7 - (nr & 0x07));
751 static inline int f2fs_set_bit(unsigned int nr, char *addr)
757 mask = 1 << (7 - (nr & 0x07));
763 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
769 mask = 1 << (7 - (nr & 0x07));
775 /* used for f2fs_inode_info->flags */
777 FI_NEW_INODE, /* indicate newly allocated inode */
778 FI_NEED_CP, /* need to do checkpoint during fsync */
779 FI_INC_LINK, /* need to increment i_nlink */
780 FI_ACL_MODE, /* indicate acl mode */
781 FI_NO_ALLOC, /* should not allocate any blocks */
784 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
786 set_bit(flag, &fi->flags);
789 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
791 return test_bit(flag, &fi->flags);
794 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
796 clear_bit(flag, &fi->flags);
799 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
801 fi->i_acl_mode = mode;
802 set_inode_flag(fi, FI_ACL_MODE);
805 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
807 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
808 clear_inode_flag(fi, FI_ACL_MODE);
817 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
818 void truncate_data_blocks(struct dnode_of_data *);
819 void f2fs_truncate(struct inode *);
820 int f2fs_setattr(struct dentry *, struct iattr *);
821 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
822 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
827 void f2fs_set_inode_flags(struct inode *);
828 struct inode *f2fs_iget_nowait(struct super_block *, unsigned long);
829 struct inode *f2fs_iget(struct super_block *, unsigned long);
830 void update_inode(struct inode *, struct page *);
831 int f2fs_write_inode(struct inode *, struct writeback_control *);
832 void f2fs_evict_inode(struct inode *);
837 struct dentry *f2fs_get_parent(struct dentry *child);
842 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
844 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
845 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
846 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
847 struct page *, struct inode *);
848 void init_dent_inode(struct dentry *, struct page *);
849 int f2fs_add_link(struct dentry *, struct inode *);
850 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
851 int f2fs_make_empty(struct inode *, struct inode *);
852 bool f2fs_empty_dir(struct inode *);
857 int f2fs_sync_fs(struct super_block *, int);
862 f2fs_hash_t f2fs_dentry_hash(const char *, int);
867 struct dnode_of_data;
870 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
871 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
872 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
873 int truncate_inode_blocks(struct inode *, pgoff_t);
874 int remove_inode_page(struct inode *);
875 int new_inode_page(struct inode *, struct dentry *);
876 struct page *new_node_page(struct dnode_of_data *, unsigned int);
877 void ra_node_page(struct f2fs_sb_info *, nid_t);
878 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
879 struct page *get_node_page_ra(struct page *, int);
880 void sync_inode_page(struct dnode_of_data *);
881 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
882 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
883 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
884 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
885 void recover_node_page(struct f2fs_sb_info *, struct page *,
886 struct f2fs_summary *, struct node_info *, block_t);
887 int recover_inode_page(struct f2fs_sb_info *, struct page *);
888 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
889 struct f2fs_summary_block *);
890 void flush_nat_entries(struct f2fs_sb_info *);
891 int build_node_manager(struct f2fs_sb_info *);
892 void destroy_node_manager(struct f2fs_sb_info *);
893 int create_node_manager_caches(void);
894 void destroy_node_manager_caches(void);
899 void f2fs_balance_fs(struct f2fs_sb_info *);
900 void invalidate_blocks(struct f2fs_sb_info *, block_t);
901 void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
902 void clear_prefree_segments(struct f2fs_sb_info *);
903 int npages_for_summary_flush(struct f2fs_sb_info *);
904 void allocate_new_segments(struct f2fs_sb_info *);
905 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
906 struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t);
907 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
908 int write_meta_page(struct f2fs_sb_info *, struct page *,
909 struct writeback_control *);
910 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
912 void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
914 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
915 void recover_data_page(struct f2fs_sb_info *, struct page *,
916 struct f2fs_summary *, block_t, block_t);
917 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
918 struct f2fs_summary *, block_t, block_t);
919 void write_data_summaries(struct f2fs_sb_info *, block_t);
920 void write_node_summaries(struct f2fs_sb_info *, block_t);
921 int lookup_journal_in_cursum(struct f2fs_summary_block *,
922 int, unsigned int, int);
923 void flush_sit_entries(struct f2fs_sb_info *);
924 int build_segment_manager(struct f2fs_sb_info *);
925 void reset_victim_segmap(struct f2fs_sb_info *);
926 void destroy_segment_manager(struct f2fs_sb_info *);
931 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
932 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
933 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
934 int check_orphan_space(struct f2fs_sb_info *);
935 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
936 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
937 int recover_orphan_inodes(struct f2fs_sb_info *);
938 int get_valid_checkpoint(struct f2fs_sb_info *);
939 void set_dirty_dir_page(struct inode *, struct page *);
940 void remove_dirty_dir_inode(struct inode *);
941 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
942 void block_operations(struct f2fs_sb_info *);
943 void write_checkpoint(struct f2fs_sb_info *, bool, bool);
944 void init_orphan_info(struct f2fs_sb_info *);
945 int create_checkpoint_caches(void);
946 void destroy_checkpoint_caches(void);
951 int reserve_new_block(struct dnode_of_data *);
952 void update_extent_cache(block_t, struct dnode_of_data *);
953 struct page *find_data_page(struct inode *, pgoff_t);
954 struct page *get_lock_data_page(struct inode *, pgoff_t);
955 struct page *get_new_data_page(struct inode *, pgoff_t, bool);
956 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
957 int do_write_data_page(struct page *);
962 int start_gc_thread(struct f2fs_sb_info *);
963 void stop_gc_thread(struct f2fs_sb_info *);
964 block_t start_bidx_of_node(unsigned int);
965 int f2fs_gc(struct f2fs_sb_info *, int);
966 void build_gc_manager(struct f2fs_sb_info *);
967 int create_gc_caches(void);
968 void destroy_gc_caches(void);
973 void recover_fsync_data(struct f2fs_sb_info *);
974 bool space_for_roll_forward(struct f2fs_sb_info *);
979 #ifdef CONFIG_F2FS_STAT_FS
980 struct f2fs_stat_info {
981 struct list_head stat_list;
982 struct f2fs_sb_info *sbi;
983 struct mutex stat_lock;
984 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
985 int main_area_segs, main_area_sections, main_area_zones;
986 int hit_ext, total_ext;
987 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
988 int nats, sits, fnids;
989 int total_count, utilization;
991 unsigned int valid_count, valid_node_count, valid_inode_count;
992 unsigned int bimodal, avg_vblocks;
993 int util_free, util_valid, util_invalid;
994 int rsvd_segs, overp_segs;
995 int dirty_count, node_pages, meta_pages;
996 int prefree_count, call_count;
997 int tot_segs, node_segs, data_segs, free_segs, free_secs;
998 int tot_blks, data_blks, node_blks;
999 int curseg[NR_CURSEG_TYPE];
1000 int cursec[NR_CURSEG_TYPE];
1001 int curzone[NR_CURSEG_TYPE];
1003 unsigned int segment_count[2];
1004 unsigned int block_count[2];
1005 unsigned base_mem, cache_mem;
1008 #define stat_inc_call_count(si) ((si)->call_count++)
1010 #define stat_inc_seg_count(sbi, type) \
1012 struct f2fs_stat_info *si = sbi->stat_info; \
1014 if (type == SUM_TYPE_DATA) \
1020 #define stat_inc_tot_blk_count(si, blks) \
1021 (si->tot_blks += (blks))
1023 #define stat_inc_data_blk_count(sbi, blks) \
1025 struct f2fs_stat_info *si = sbi->stat_info; \
1026 stat_inc_tot_blk_count(si, blks); \
1027 si->data_blks += (blks); \
1030 #define stat_inc_node_blk_count(sbi, blks) \
1032 struct f2fs_stat_info *si = sbi->stat_info; \
1033 stat_inc_tot_blk_count(si, blks); \
1034 si->node_blks += (blks); \
1037 int f2fs_build_stats(struct f2fs_sb_info *);
1038 void f2fs_destroy_stats(struct f2fs_sb_info *);
1039 void destroy_root_stats(void);
1041 #define stat_inc_call_count(si)
1042 #define stat_inc_seg_count(si, type)
1043 #define stat_inc_tot_blk_count(si, blks)
1044 #define stat_inc_data_blk_count(si, blks)
1045 #define stat_inc_node_blk_count(sbi, blks)
1047 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1048 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1049 static inline void destroy_root_stats(void) { }
1052 extern const struct file_operations f2fs_dir_operations;
1053 extern const struct file_operations f2fs_file_operations;
1054 extern const struct inode_operations f2fs_file_inode_operations;
1055 extern const struct address_space_operations f2fs_dblock_aops;
1056 extern const struct address_space_operations f2fs_node_aops;
1057 extern const struct address_space_operations f2fs_meta_aops;
1058 extern const struct inode_operations f2fs_dir_inode_operations;
1059 extern const struct inode_operations f2fs_symlink_inode_operations;
1060 extern const struct inode_operations f2fs_special_inode_operations;