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 unsigned int i_pino; /* parent inode number */
140 umode_t i_acl_mode; /* keep file acl mode temporarily */
142 /* Use below internally in f2fs*/
143 unsigned long flags; /* use to pass per-file flags */
144 unsigned long long data_version;/* lastes version of data for fsync */
145 atomic_t dirty_dents; /* # of dirty dentry pages */
146 f2fs_hash_t chash; /* hash value of given file name */
147 unsigned int clevel; /* maximum level of given file name */
148 nid_t i_xattr_nid; /* node id that contains xattrs */
149 struct extent_info ext; /* in-memory extent cache entry */
152 static inline void get_extent_info(struct extent_info *ext,
153 struct f2fs_extent i_ext)
155 write_lock(&ext->ext_lock);
156 ext->fofs = le32_to_cpu(i_ext.fofs);
157 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
158 ext->len = le32_to_cpu(i_ext.len);
159 write_unlock(&ext->ext_lock);
162 static inline void set_raw_extent(struct extent_info *ext,
163 struct f2fs_extent *i_ext)
165 read_lock(&ext->ext_lock);
166 i_ext->fofs = cpu_to_le32(ext->fofs);
167 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
168 i_ext->len = cpu_to_le32(ext->len);
169 read_unlock(&ext->ext_lock);
172 struct f2fs_nm_info {
173 block_t nat_blkaddr; /* base disk address of NAT */
174 nid_t max_nid; /* maximum possible node ids */
175 nid_t init_scan_nid; /* the first nid to be scanned */
176 nid_t next_scan_nid; /* the next nid to be scanned */
178 /* NAT cache management */
179 struct radix_tree_root nat_root;/* root of the nat entry cache */
180 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
181 unsigned int nat_cnt; /* the # of cached nat entries */
182 struct list_head nat_entries; /* cached nat entry list (clean) */
183 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
185 /* free node ids management */
186 struct list_head free_nid_list; /* a list for free nids */
187 spinlock_t free_nid_list_lock; /* protect free nid list */
188 unsigned int fcnt; /* the number of free node id */
189 struct mutex build_lock; /* lock for build free nids */
192 char *nat_bitmap; /* NAT bitmap pointer */
193 int bitmap_size; /* bitmap size */
197 * this structure is used as one of function parameters.
198 * all the information are dedicated to a given direct node block determined
199 * by the data offset in a file.
201 struct dnode_of_data {
202 struct inode *inode; /* vfs inode pointer */
203 struct page *inode_page; /* its inode page, NULL is possible */
204 struct page *node_page; /* cached direct node page */
205 nid_t nid; /* node id of the direct node block */
206 unsigned int ofs_in_node; /* data offset in the node page */
207 bool inode_page_locked; /* inode page is locked or not */
208 block_t data_blkaddr; /* block address of the node block */
211 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
212 struct page *ipage, struct page *npage, nid_t nid)
215 dn->inode_page = ipage;
216 dn->node_page = npage;
218 dn->inode_page_locked = 0;
224 * By default, there are 6 active log areas across the whole main area.
225 * When considering hot and cold data separation to reduce cleaning overhead,
226 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
228 * In the current design, you should not change the numbers intentionally.
229 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
230 * logs individually according to the underlying devices. (default: 6)
231 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
232 * data and 8 for node logs.
234 #define NR_CURSEG_DATA_TYPE (3)
235 #define NR_CURSEG_NODE_TYPE (3)
236 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
239 CURSEG_HOT_DATA = 0, /* directory entry blocks */
240 CURSEG_WARM_DATA, /* data blocks */
241 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
242 CURSEG_HOT_NODE, /* direct node blocks of directory files */
243 CURSEG_WARM_NODE, /* direct node blocks of normal files */
244 CURSEG_COLD_NODE, /* indirect node blocks */
248 struct f2fs_sm_info {
249 struct sit_info *sit_info; /* whole segment information */
250 struct free_segmap_info *free_info; /* free segment information */
251 struct dirty_seglist_info *dirty_info; /* dirty segment information */
252 struct curseg_info *curseg_array; /* active segment information */
254 struct list_head wblist_head; /* list of under-writeback pages */
255 spinlock_t wblist_lock; /* lock for checkpoint */
257 block_t seg0_blkaddr; /* block address of 0'th segment */
258 block_t main_blkaddr; /* start block address of main area */
259 block_t ssa_blkaddr; /* start block address of SSA area */
261 unsigned int segment_count; /* total # of segments */
262 unsigned int main_segments; /* # of segments in main area */
263 unsigned int reserved_segments; /* # of reserved segments */
264 unsigned int ovp_segments; /* # of overprovision segments */
268 * For directory operation
270 #define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
271 #define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
272 #define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
273 #define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
274 #define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
280 * COUNT_TYPE for monitoring
282 * f2fs monitors the number of several block types such as on-writeback,
283 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
294 * FS_LOCK nesting subclasses for the lock validator:
296 * The locking order between these classes is
297 * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW
298 * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC
301 RENAME, /* for renaming operations */
302 DENTRY_OPS, /* for directory operations */
303 DATA_WRITE, /* for data write */
304 DATA_NEW, /* for data allocation */
305 DATA_TRUNC, /* for data truncate */
306 NODE_NEW, /* for node allocation */
307 NODE_TRUNC, /* for node truncate */
308 NODE_WRITE, /* for node write */
313 * The below are the page types of bios used in submti_bio().
314 * The available types are:
315 * DATA User data pages. It operates as async mode.
316 * NODE Node pages. It operates as async mode.
317 * META FS metadata pages such as SIT, NAT, CP.
318 * NR_PAGE_TYPE The number of page types.
319 * META_FLUSH Make sure the previous pages are written
320 * with waiting the bio's completion
321 * ... Only can be used with META.
331 struct f2fs_sb_info {
332 struct super_block *sb; /* pointer to VFS super block */
333 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
334 struct f2fs_super_block *raw_super; /* raw super block pointer */
335 int s_dirty; /* dirty flag for checkpoint */
337 /* for node-related operations */
338 struct f2fs_nm_info *nm_info; /* node manager */
339 struct inode *node_inode; /* cache node blocks */
341 /* for segment-related operations */
342 struct f2fs_sm_info *sm_info; /* segment manager */
343 struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */
344 sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */
345 struct rw_semaphore bio_sem; /* IO semaphore */
348 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
349 struct inode *meta_inode; /* cache meta blocks */
350 struct mutex cp_mutex; /* for checkpoint procedure */
351 struct mutex fs_lock[NR_LOCK_TYPE]; /* for blocking FS operations */
352 struct mutex write_inode; /* mutex for write inode */
353 struct mutex writepages; /* mutex for writepages() */
354 int por_doing; /* recovery is doing or not */
356 /* for orphan inode management */
357 struct list_head orphan_inode_list; /* orphan inode list */
358 struct mutex orphan_inode_mutex; /* for orphan inode list */
359 unsigned int n_orphans; /* # of orphan inodes */
361 /* for directory inode management */
362 struct list_head dir_inode_list; /* dir inode list */
363 spinlock_t dir_inode_lock; /* for dir inode list lock */
364 unsigned int n_dirty_dirs; /* # of dir inodes */
366 /* basic file system units */
367 unsigned int log_sectors_per_block; /* log2 sectors per block */
368 unsigned int log_blocksize; /* log2 block size */
369 unsigned int blocksize; /* block size */
370 unsigned int root_ino_num; /* root inode number*/
371 unsigned int node_ino_num; /* node inode number*/
372 unsigned int meta_ino_num; /* meta inode number*/
373 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
374 unsigned int blocks_per_seg; /* blocks per segment */
375 unsigned int segs_per_sec; /* segments per section */
376 unsigned int secs_per_zone; /* sections per zone */
377 unsigned int total_sections; /* total section count */
378 unsigned int total_node_count; /* total node block count */
379 unsigned int total_valid_node_count; /* valid node block count */
380 unsigned int total_valid_inode_count; /* valid inode count */
381 int active_logs; /* # of active logs */
383 block_t user_block_count; /* # of user blocks */
384 block_t total_valid_block_count; /* # of valid blocks */
385 block_t alloc_valid_block_count; /* # of allocated blocks */
386 block_t last_valid_block_count; /* for recovery */
387 u32 s_next_generation; /* for NFS support */
388 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
390 struct f2fs_mount_info mount_opt; /* mount options */
392 /* for cleaning operations */
393 struct mutex gc_mutex; /* mutex for GC */
394 struct f2fs_gc_kthread *gc_thread; /* GC thread */
397 * for stat information.
398 * one is for the LFS mode, and the other is for the SSR mode.
400 struct f2fs_stat_info *stat_info; /* FS status information */
401 unsigned int segment_count[2]; /* # of allocated segments */
402 unsigned int block_count[2]; /* # of allocated blocks */
403 unsigned int last_victim[2]; /* last victim segment # */
404 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
405 int bg_gc; /* background gc calls */
406 spinlock_t stat_lock; /* lock for stat operations */
412 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
414 return container_of(inode, struct f2fs_inode_info, vfs_inode);
417 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
419 return sb->s_fs_info;
422 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
424 return (struct f2fs_super_block *)(sbi->raw_super);
427 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
429 return (struct f2fs_checkpoint *)(sbi->ckpt);
432 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
434 return (struct f2fs_nm_info *)(sbi->nm_info);
437 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
439 return (struct f2fs_sm_info *)(sbi->sm_info);
442 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
444 return (struct sit_info *)(SM_I(sbi)->sit_info);
447 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
449 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
452 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
454 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
457 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
462 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
467 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
469 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
470 return ckpt_flags & f;
473 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
475 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
477 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
480 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
482 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
484 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
487 static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t)
489 mutex_lock_nested(&sbi->fs_lock[t], t);
492 static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t)
494 mutex_unlock(&sbi->fs_lock[t]);
498 * Check whether the given nid is within node id range.
500 static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
502 BUG_ON((nid >= NM_I(sbi)->max_nid));
505 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
508 * Check whether the inode has blocks or not
510 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
512 if (F2FS_I(inode)->i_xattr_nid)
513 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
515 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
518 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
519 struct inode *inode, blkcnt_t count)
521 block_t valid_block_count;
523 spin_lock(&sbi->stat_lock);
525 sbi->total_valid_block_count + (block_t)count;
526 if (valid_block_count > sbi->user_block_count) {
527 spin_unlock(&sbi->stat_lock);
530 inode->i_blocks += count;
531 sbi->total_valid_block_count = valid_block_count;
532 sbi->alloc_valid_block_count += (block_t)count;
533 spin_unlock(&sbi->stat_lock);
537 static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
541 spin_lock(&sbi->stat_lock);
542 BUG_ON(sbi->total_valid_block_count < (block_t) count);
543 BUG_ON(inode->i_blocks < count);
544 inode->i_blocks -= count;
545 sbi->total_valid_block_count -= (block_t)count;
546 spin_unlock(&sbi->stat_lock);
550 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
552 atomic_inc(&sbi->nr_pages[count_type]);
553 F2FS_SET_SB_DIRT(sbi);
556 static inline void inode_inc_dirty_dents(struct inode *inode)
558 atomic_inc(&F2FS_I(inode)->dirty_dents);
561 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
563 atomic_dec(&sbi->nr_pages[count_type]);
566 static inline void inode_dec_dirty_dents(struct inode *inode)
568 atomic_dec(&F2FS_I(inode)->dirty_dents);
571 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
573 return atomic_read(&sbi->nr_pages[count_type]);
576 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
579 spin_lock(&sbi->stat_lock);
580 ret = sbi->total_valid_block_count;
581 spin_unlock(&sbi->stat_lock);
585 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
587 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
589 /* return NAT or SIT bitmap */
590 if (flag == NAT_BITMAP)
591 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
592 else if (flag == SIT_BITMAP)
593 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
598 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
600 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
601 int offset = (flag == NAT_BITMAP) ?
602 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
603 return &ckpt->sit_nat_version_bitmap + offset;
606 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
609 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
610 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
612 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
615 * odd numbered checkpoint should at cp segment 0
616 * and even segent must be at cp segment 1
618 if (!(ckpt_version & 1))
619 start_addr += sbi->blocks_per_seg;
624 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
626 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
629 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
633 block_t valid_block_count;
634 unsigned int valid_node_count;
636 spin_lock(&sbi->stat_lock);
638 valid_block_count = sbi->total_valid_block_count + (block_t)count;
639 sbi->alloc_valid_block_count += (block_t)count;
640 valid_node_count = sbi->total_valid_node_count + count;
642 if (valid_block_count > sbi->user_block_count) {
643 spin_unlock(&sbi->stat_lock);
647 if (valid_node_count > sbi->total_node_count) {
648 spin_unlock(&sbi->stat_lock);
653 inode->i_blocks += count;
654 sbi->total_valid_node_count = valid_node_count;
655 sbi->total_valid_block_count = valid_block_count;
656 spin_unlock(&sbi->stat_lock);
661 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
665 spin_lock(&sbi->stat_lock);
667 BUG_ON(sbi->total_valid_block_count < count);
668 BUG_ON(sbi->total_valid_node_count < count);
669 BUG_ON(inode->i_blocks < count);
671 inode->i_blocks -= count;
672 sbi->total_valid_node_count -= count;
673 sbi->total_valid_block_count -= (block_t)count;
675 spin_unlock(&sbi->stat_lock);
678 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
681 spin_lock(&sbi->stat_lock);
682 ret = sbi->total_valid_node_count;
683 spin_unlock(&sbi->stat_lock);
687 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
689 spin_lock(&sbi->stat_lock);
690 BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
691 sbi->total_valid_inode_count++;
692 spin_unlock(&sbi->stat_lock);
695 static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
697 spin_lock(&sbi->stat_lock);
698 BUG_ON(!sbi->total_valid_inode_count);
699 sbi->total_valid_inode_count--;
700 spin_unlock(&sbi->stat_lock);
704 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
707 spin_lock(&sbi->stat_lock);
708 ret = sbi->total_valid_inode_count;
709 spin_unlock(&sbi->stat_lock);
713 static inline void f2fs_put_page(struct page *page, int unlock)
715 if (!page || IS_ERR(page))
719 BUG_ON(!PageLocked(page));
722 page_cache_release(page);
725 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
728 f2fs_put_page(dn->node_page, 1);
729 if (dn->inode_page && dn->node_page != dn->inode_page)
730 f2fs_put_page(dn->inode_page, 0);
731 dn->node_page = NULL;
732 dn->inode_page = NULL;
735 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
736 size_t size, void (*ctor)(void *))
738 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
741 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
743 static inline bool IS_INODE(struct page *page)
745 struct f2fs_node *p = (struct f2fs_node *)page_address(page);
746 return RAW_IS_INODE(p);
749 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
751 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
754 static inline block_t datablock_addr(struct page *node_page,
757 struct f2fs_node *raw_node;
759 raw_node = (struct f2fs_node *)page_address(node_page);
760 addr_array = blkaddr_in_node(raw_node);
761 return le32_to_cpu(addr_array[offset]);
764 static inline int f2fs_test_bit(unsigned int nr, char *addr)
769 mask = 1 << (7 - (nr & 0x07));
773 static inline int f2fs_set_bit(unsigned int nr, char *addr)
779 mask = 1 << (7 - (nr & 0x07));
785 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
791 mask = 1 << (7 - (nr & 0x07));
797 /* used for f2fs_inode_info->flags */
799 FI_NEW_INODE, /* indicate newly allocated inode */
800 FI_NEED_CP, /* need to do checkpoint during fsync */
801 FI_INC_LINK, /* need to increment i_nlink */
802 FI_ACL_MODE, /* indicate acl mode */
803 FI_NO_ALLOC, /* should not allocate any blocks */
806 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
808 set_bit(flag, &fi->flags);
811 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
813 return test_bit(flag, &fi->flags);
816 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
818 clear_bit(flag, &fi->flags);
821 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
823 fi->i_acl_mode = mode;
824 set_inode_flag(fi, FI_ACL_MODE);
827 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
829 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
830 clear_inode_flag(fi, FI_ACL_MODE);
839 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
840 void truncate_data_blocks(struct dnode_of_data *);
841 void f2fs_truncate(struct inode *);
842 int f2fs_setattr(struct dentry *, struct iattr *);
843 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
844 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
849 void f2fs_set_inode_flags(struct inode *);
850 struct inode *f2fs_iget_nowait(struct super_block *, unsigned long);
851 struct inode *f2fs_iget(struct super_block *, unsigned long);
852 void update_inode(struct inode *, struct page *);
853 int f2fs_write_inode(struct inode *, struct writeback_control *);
854 void f2fs_evict_inode(struct inode *);
859 struct dentry *f2fs_get_parent(struct dentry *child);
864 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
866 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
867 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
868 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
869 struct page *, struct inode *);
870 void init_dent_inode(struct dentry *, struct page *);
871 int f2fs_add_link(struct dentry *, struct inode *);
872 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
873 int f2fs_make_empty(struct inode *, struct inode *);
874 bool f2fs_empty_dir(struct inode *);
879 int f2fs_sync_fs(struct super_block *, int);
884 f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
889 struct dnode_of_data;
892 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
893 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
894 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
895 int truncate_inode_blocks(struct inode *, pgoff_t);
896 int remove_inode_page(struct inode *);
897 int new_inode_page(struct inode *, struct dentry *);
898 struct page *new_node_page(struct dnode_of_data *, unsigned int);
899 void ra_node_page(struct f2fs_sb_info *, nid_t);
900 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
901 struct page *get_node_page_ra(struct page *, int);
902 void sync_inode_page(struct dnode_of_data *);
903 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
904 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
905 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
906 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
907 void recover_node_page(struct f2fs_sb_info *, struct page *,
908 struct f2fs_summary *, struct node_info *, block_t);
909 int recover_inode_page(struct f2fs_sb_info *, struct page *);
910 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
911 struct f2fs_summary_block *);
912 void flush_nat_entries(struct f2fs_sb_info *);
913 int build_node_manager(struct f2fs_sb_info *);
914 void destroy_node_manager(struct f2fs_sb_info *);
915 int create_node_manager_caches(void);
916 void destroy_node_manager_caches(void);
921 void f2fs_balance_fs(struct f2fs_sb_info *);
922 void invalidate_blocks(struct f2fs_sb_info *, block_t);
923 void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
924 void clear_prefree_segments(struct f2fs_sb_info *);
925 int npages_for_summary_flush(struct f2fs_sb_info *);
926 void allocate_new_segments(struct f2fs_sb_info *);
927 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
928 struct bio *f2fs_bio_alloc(struct block_device *, int);
929 void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
930 int write_meta_page(struct f2fs_sb_info *, struct page *,
931 struct writeback_control *);
932 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
934 void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
936 void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
937 void recover_data_page(struct f2fs_sb_info *, struct page *,
938 struct f2fs_summary *, block_t, block_t);
939 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
940 struct f2fs_summary *, block_t, block_t);
941 void write_data_summaries(struct f2fs_sb_info *, block_t);
942 void write_node_summaries(struct f2fs_sb_info *, block_t);
943 int lookup_journal_in_cursum(struct f2fs_summary_block *,
944 int, unsigned int, int);
945 void flush_sit_entries(struct f2fs_sb_info *);
946 int build_segment_manager(struct f2fs_sb_info *);
947 void reset_victim_segmap(struct f2fs_sb_info *);
948 void destroy_segment_manager(struct f2fs_sb_info *);
953 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
954 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
955 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
956 int check_orphan_space(struct f2fs_sb_info *);
957 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
958 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
959 int recover_orphan_inodes(struct f2fs_sb_info *);
960 int get_valid_checkpoint(struct f2fs_sb_info *);
961 void set_dirty_dir_page(struct inode *, struct page *);
962 void remove_dirty_dir_inode(struct inode *);
963 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
964 void block_operations(struct f2fs_sb_info *);
965 void write_checkpoint(struct f2fs_sb_info *, bool, bool);
966 void init_orphan_info(struct f2fs_sb_info *);
967 int create_checkpoint_caches(void);
968 void destroy_checkpoint_caches(void);
973 int reserve_new_block(struct dnode_of_data *);
974 void update_extent_cache(block_t, struct dnode_of_data *);
975 struct page *find_data_page(struct inode *, pgoff_t);
976 struct page *get_lock_data_page(struct inode *, pgoff_t);
977 struct page *get_new_data_page(struct inode *, pgoff_t, bool);
978 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
979 int do_write_data_page(struct page *);
984 int start_gc_thread(struct f2fs_sb_info *);
985 void stop_gc_thread(struct f2fs_sb_info *);
986 block_t start_bidx_of_node(unsigned int);
987 int f2fs_gc(struct f2fs_sb_info *, int);
988 void build_gc_manager(struct f2fs_sb_info *);
989 int create_gc_caches(void);
990 void destroy_gc_caches(void);
995 void recover_fsync_data(struct f2fs_sb_info *);
996 bool space_for_roll_forward(struct f2fs_sb_info *);
1001 #ifdef CONFIG_F2FS_STAT_FS
1002 struct f2fs_stat_info {
1003 struct list_head stat_list;
1004 struct f2fs_sb_info *sbi;
1005 struct mutex stat_lock;
1006 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1007 int main_area_segs, main_area_sections, main_area_zones;
1008 int hit_ext, total_ext;
1009 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1010 int nats, sits, fnids;
1011 int total_count, utilization;
1013 unsigned int valid_count, valid_node_count, valid_inode_count;
1014 unsigned int bimodal, avg_vblocks;
1015 int util_free, util_valid, util_invalid;
1016 int rsvd_segs, overp_segs;
1017 int dirty_count, node_pages, meta_pages;
1018 int prefree_count, call_count;
1019 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1020 int tot_blks, data_blks, node_blks;
1021 int curseg[NR_CURSEG_TYPE];
1022 int cursec[NR_CURSEG_TYPE];
1023 int curzone[NR_CURSEG_TYPE];
1025 unsigned int segment_count[2];
1026 unsigned int block_count[2];
1027 unsigned base_mem, cache_mem;
1030 #define stat_inc_call_count(si) ((si)->call_count++)
1032 #define stat_inc_seg_count(sbi, type) \
1034 struct f2fs_stat_info *si = sbi->stat_info; \
1036 if (type == SUM_TYPE_DATA) \
1042 #define stat_inc_tot_blk_count(si, blks) \
1043 (si->tot_blks += (blks))
1045 #define stat_inc_data_blk_count(sbi, blks) \
1047 struct f2fs_stat_info *si = sbi->stat_info; \
1048 stat_inc_tot_blk_count(si, blks); \
1049 si->data_blks += (blks); \
1052 #define stat_inc_node_blk_count(sbi, blks) \
1054 struct f2fs_stat_info *si = sbi->stat_info; \
1055 stat_inc_tot_blk_count(si, blks); \
1056 si->node_blks += (blks); \
1059 int f2fs_build_stats(struct f2fs_sb_info *);
1060 void f2fs_destroy_stats(struct f2fs_sb_info *);
1061 void destroy_root_stats(void);
1063 #define stat_inc_call_count(si)
1064 #define stat_inc_seg_count(si, type)
1065 #define stat_inc_tot_blk_count(si, blks)
1066 #define stat_inc_data_blk_count(si, blks)
1067 #define stat_inc_node_blk_count(sbi, blks)
1069 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1070 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1071 static inline void destroy_root_stats(void) { }
1074 extern const struct file_operations f2fs_dir_operations;
1075 extern const struct file_operations f2fs_file_operations;
1076 extern const struct inode_operations f2fs_file_inode_operations;
1077 extern const struct address_space_operations f2fs_dblock_aops;
1078 extern const struct address_space_operations f2fs_node_aops;
1079 extern const struct address_space_operations f2fs_meta_aops;
1080 extern const struct inode_operations f2fs_dir_inode_operations;
1081 extern const struct inode_operations f2fs_symlink_inode_operations;
1082 extern const struct inode_operations f2fs_special_inode_operations;