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)
25 #define f2fs_down_write(x, y) down_write_nest_lock(x, y)
27 #define f2fs_bug_on(condition)
28 #define f2fs_down_write(x, y) down_write(x)
34 #define F2FS_MOUNT_BG_GC 0x00000001
35 #define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
36 #define F2FS_MOUNT_DISCARD 0x00000004
37 #define F2FS_MOUNT_NOHEAP 0x00000008
38 #define F2FS_MOUNT_XATTR_USER 0x00000010
39 #define F2FS_MOUNT_POSIX_ACL 0x00000020
40 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
41 #define F2FS_MOUNT_INLINE_XATTR 0x00000080
42 #define F2FS_MOUNT_INLINE_DATA 0x00000100
44 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
45 #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
46 #define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
48 #define ver_after(a, b) (typecheck(unsigned long long, a) && \
49 typecheck(unsigned long long, b) && \
50 ((long long)((a) - (b)) > 0))
52 typedef u32 block_t; /*
53 * should not change u32, since it is the on-disk block
54 * address format, __le32.
58 struct f2fs_mount_info {
62 #define CRCPOLY_LE 0xedb88320
64 static inline __u32 f2fs_crc32(void *buf, size_t len)
66 unsigned char *p = (unsigned char *)buf;
67 __u32 crc = F2FS_SUPER_MAGIC;
72 for (i = 0; i < 8; i++)
73 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
78 static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
80 return f2fs_crc32(buf, buf_size) == blk_crc;
84 * For checkpoint manager
91 /* for the list of orphan inodes */
92 struct orphan_inode_entry {
93 struct list_head list; /* list head */
94 nid_t ino; /* inode number */
97 /* for the list of directory inodes */
98 struct dir_inode_entry {
99 struct list_head list; /* list head */
100 struct inode *inode; /* vfs inode pointer */
103 /* for the list of blockaddresses to be discarded */
104 struct discard_entry {
105 struct list_head list; /* list head */
106 block_t blkaddr; /* block address to be discarded */
107 int len; /* # of consecutive blocks of the discard */
110 /* for the list of fsync inodes, used only during recovery */
111 struct fsync_inode_entry {
112 struct list_head list; /* list head */
113 struct inode *inode; /* vfs inode pointer */
114 block_t blkaddr; /* block address locating the last inode */
117 #define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
118 #define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
120 #define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
121 #define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
122 #define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
123 #define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
125 static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
127 int before = nats_in_cursum(rs);
128 rs->n_nats = cpu_to_le16(before + i);
132 static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
134 int before = sits_in_cursum(rs);
135 rs->n_sits = cpu_to_le16(before + i);
142 #define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
143 #define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
145 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
147 * ioctl commands in 32 bit emulation
149 #define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
150 #define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
154 * For INODE and NODE manager
157 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
158 * as its node offset to distinguish from index node blocks.
159 * But some bits are used to mark the node block.
161 #define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
164 ALLOC_NODE, /* allocate a new node page if needed */
165 LOOKUP_NODE, /* look up a node without readahead */
167 * look up a node with readahead called
168 * by get_datablock_ro.
172 #define F2FS_LINK_MAX 32000 /* maximum link count per file */
174 /* for in-memory extent cache entry */
175 #define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
178 rwlock_t ext_lock; /* rwlock for consistency */
179 unsigned int fofs; /* start offset in a file */
180 u32 blk_addr; /* start block address of the extent */
181 unsigned int len; /* length of the extent */
185 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
187 #define FADVISE_COLD_BIT 0x01
188 #define FADVISE_LOST_PINO_BIT 0x02
190 struct f2fs_inode_info {
191 struct inode vfs_inode; /* serve a vfs inode */
192 unsigned long i_flags; /* keep an inode flags for ioctl */
193 unsigned char i_advise; /* use to give file attribute hints */
194 unsigned int i_current_depth; /* use only in directory structure */
195 unsigned int i_pino; /* parent inode number */
196 umode_t i_acl_mode; /* keep file acl mode temporarily */
198 /* Use below internally in f2fs*/
199 unsigned long flags; /* use to pass per-file flags */
200 atomic_t dirty_dents; /* # of dirty dentry pages */
201 f2fs_hash_t chash; /* hash value of given file name */
202 unsigned int clevel; /* maximum level of given file name */
203 nid_t i_xattr_nid; /* node id that contains xattrs */
204 unsigned long long xattr_ver; /* cp version of xattr modification */
205 struct extent_info ext; /* in-memory extent cache entry */
208 static inline void get_extent_info(struct extent_info *ext,
209 struct f2fs_extent i_ext)
211 write_lock(&ext->ext_lock);
212 ext->fofs = le32_to_cpu(i_ext.fofs);
213 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
214 ext->len = le32_to_cpu(i_ext.len);
215 write_unlock(&ext->ext_lock);
218 static inline void set_raw_extent(struct extent_info *ext,
219 struct f2fs_extent *i_ext)
221 read_lock(&ext->ext_lock);
222 i_ext->fofs = cpu_to_le32(ext->fofs);
223 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
224 i_ext->len = cpu_to_le32(ext->len);
225 read_unlock(&ext->ext_lock);
228 struct f2fs_nm_info {
229 block_t nat_blkaddr; /* base disk address of NAT */
230 nid_t max_nid; /* maximum possible node ids */
231 nid_t next_scan_nid; /* the next nid to be scanned */
233 /* NAT cache management */
234 struct radix_tree_root nat_root;/* root of the nat entry cache */
235 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
236 unsigned int nat_cnt; /* the # of cached nat entries */
237 struct list_head nat_entries; /* cached nat entry list (clean) */
238 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
240 /* free node ids management */
241 struct list_head free_nid_list; /* a list for free nids */
242 spinlock_t free_nid_list_lock; /* protect free nid list */
243 unsigned int fcnt; /* the number of free node id */
244 struct mutex build_lock; /* lock for build free nids */
247 char *nat_bitmap; /* NAT bitmap pointer */
248 int bitmap_size; /* bitmap size */
252 * this structure is used as one of function parameters.
253 * all the information are dedicated to a given direct node block determined
254 * by the data offset in a file.
256 struct dnode_of_data {
257 struct inode *inode; /* vfs inode pointer */
258 struct page *inode_page; /* its inode page, NULL is possible */
259 struct page *node_page; /* cached direct node page */
260 nid_t nid; /* node id of the direct node block */
261 unsigned int ofs_in_node; /* data offset in the node page */
262 bool inode_page_locked; /* inode page is locked or not */
263 block_t data_blkaddr; /* block address of the node block */
266 static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
267 struct page *ipage, struct page *npage, nid_t nid)
269 memset(dn, 0, sizeof(*dn));
271 dn->inode_page = ipage;
272 dn->node_page = npage;
279 * By default, there are 6 active log areas across the whole main area.
280 * When considering hot and cold data separation to reduce cleaning overhead,
281 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
283 * In the current design, you should not change the numbers intentionally.
284 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
285 * logs individually according to the underlying devices. (default: 6)
286 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
287 * data and 8 for node logs.
289 #define NR_CURSEG_DATA_TYPE (3)
290 #define NR_CURSEG_NODE_TYPE (3)
291 #define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
294 CURSEG_HOT_DATA = 0, /* directory entry blocks */
295 CURSEG_WARM_DATA, /* data blocks */
296 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
297 CURSEG_HOT_NODE, /* direct node blocks of directory files */
298 CURSEG_WARM_NODE, /* direct node blocks of normal files */
299 CURSEG_COLD_NODE, /* indirect node blocks */
303 struct f2fs_sm_info {
304 struct sit_info *sit_info; /* whole segment information */
305 struct free_segmap_info *free_info; /* free segment information */
306 struct dirty_seglist_info *dirty_info; /* dirty segment information */
307 struct curseg_info *curseg_array; /* active segment information */
309 struct list_head wblist_head; /* list of under-writeback pages */
310 spinlock_t wblist_lock; /* lock for checkpoint */
312 block_t seg0_blkaddr; /* block address of 0'th segment */
313 block_t main_blkaddr; /* start block address of main area */
314 block_t ssa_blkaddr; /* start block address of SSA area */
316 unsigned int segment_count; /* total # of segments */
317 unsigned int main_segments; /* # of segments in main area */
318 unsigned int reserved_segments; /* # of reserved segments */
319 unsigned int ovp_segments; /* # of overprovision segments */
321 /* a threshold to reclaim prefree segments */
322 unsigned int rec_prefree_segments;
324 /* for small discard management */
325 struct list_head discard_list; /* 4KB discard list */
326 int nr_discards; /* # of discards in the list */
327 int max_discards; /* max. discards to be issued */
329 unsigned int ipu_policy; /* in-place-update policy */
330 unsigned int min_ipu_util; /* in-place-update threshold */
337 * COUNT_TYPE for monitoring
339 * f2fs monitors the number of several block types such as on-writeback,
340 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
351 * The below are the page types of bios used in submti_bio().
352 * The available types are:
353 * DATA User data pages. It operates as async mode.
354 * NODE Node pages. It operates as async mode.
355 * META FS metadata pages such as SIT, NAT, CP.
356 * NR_PAGE_TYPE The number of page types.
357 * META_FLUSH Make sure the previous pages are written
358 * with waiting the bio's completion
359 * ... Only can be used with META.
361 #define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
370 struct f2fs_io_info {
371 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
372 int rw; /* contains R/RS/W/WS */
373 int rw_flag; /* contains REQ_META/REQ_PRIO */
376 #define is_read_io(rw) (((rw) & 1) == READ)
377 struct f2fs_bio_info {
378 struct f2fs_sb_info *sbi; /* f2fs superblock */
379 struct bio *bio; /* bios to merge */
380 sector_t last_block_in_bio; /* last block number */
381 struct f2fs_io_info fio; /* store buffered io info. */
382 struct mutex io_mutex; /* mutex for bio */
385 struct f2fs_sb_info {
386 struct super_block *sb; /* pointer to VFS super block */
387 struct proc_dir_entry *s_proc; /* proc entry */
388 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
389 struct f2fs_super_block *raw_super; /* raw super block pointer */
390 int s_dirty; /* dirty flag for checkpoint */
392 /* for node-related operations */
393 struct f2fs_nm_info *nm_info; /* node manager */
394 struct inode *node_inode; /* cache node blocks */
396 /* for segment-related operations */
397 struct f2fs_sm_info *sm_info; /* segment manager */
399 /* for bio operations */
400 struct f2fs_bio_info read_io; /* for read bios */
401 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
404 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
405 struct inode *meta_inode; /* cache meta blocks */
406 struct mutex cp_mutex; /* checkpoint procedure lock */
407 struct rw_semaphore cp_rwsem; /* blocking FS operations */
408 struct mutex node_write; /* locking node writes */
409 struct mutex writepages; /* mutex for writepages() */
410 bool por_doing; /* recovery is doing or not */
411 bool on_build_free_nids; /* build_free_nids is doing */
412 wait_queue_head_t cp_wait;
414 /* for orphan inode management */
415 struct list_head orphan_inode_list; /* orphan inode list */
416 struct mutex orphan_inode_mutex; /* for orphan inode list */
417 unsigned int n_orphans; /* # of orphan inodes */
419 /* for directory inode management */
420 struct list_head dir_inode_list; /* dir inode list */
421 spinlock_t dir_inode_lock; /* for dir inode list lock */
423 /* basic file system units */
424 unsigned int log_sectors_per_block; /* log2 sectors per block */
425 unsigned int log_blocksize; /* log2 block size */
426 unsigned int blocksize; /* block size */
427 unsigned int root_ino_num; /* root inode number*/
428 unsigned int node_ino_num; /* node inode number*/
429 unsigned int meta_ino_num; /* meta inode number*/
430 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
431 unsigned int blocks_per_seg; /* blocks per segment */
432 unsigned int segs_per_sec; /* segments per section */
433 unsigned int secs_per_zone; /* sections per zone */
434 unsigned int total_sections; /* total section count */
435 unsigned int total_node_count; /* total node block count */
436 unsigned int total_valid_node_count; /* valid node block count */
437 unsigned int total_valid_inode_count; /* valid inode count */
438 int active_logs; /* # of active logs */
440 block_t user_block_count; /* # of user blocks */
441 block_t total_valid_block_count; /* # of valid blocks */
442 block_t alloc_valid_block_count; /* # of allocated blocks */
443 block_t last_valid_block_count; /* for recovery */
444 u32 s_next_generation; /* for NFS support */
445 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
447 struct f2fs_mount_info mount_opt; /* mount options */
449 /* for cleaning operations */
450 struct mutex gc_mutex; /* mutex for GC */
451 struct f2fs_gc_kthread *gc_thread; /* GC thread */
452 unsigned int cur_victim_sec; /* current victim section num */
455 * for stat information.
456 * one is for the LFS mode, and the other is for the SSR mode.
458 #ifdef CONFIG_F2FS_STAT_FS
459 struct f2fs_stat_info *stat_info; /* FS status information */
460 unsigned int segment_count[2]; /* # of allocated segments */
461 unsigned int block_count[2]; /* # of allocated blocks */
462 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
463 int bg_gc; /* background gc calls */
464 unsigned int n_dirty_dirs; /* # of dir inodes */
466 unsigned int last_victim[2]; /* last victim segment # */
467 spinlock_t stat_lock; /* lock for stat operations */
469 /* For sysfs suppport */
470 struct kobject s_kobj;
471 struct completion s_kobj_unregister;
477 static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
479 return container_of(inode, struct f2fs_inode_info, vfs_inode);
482 static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
484 return sb->s_fs_info;
487 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
489 return (struct f2fs_super_block *)(sbi->raw_super);
492 static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
494 return (struct f2fs_checkpoint *)(sbi->ckpt);
497 static inline struct f2fs_node *F2FS_NODE(struct page *page)
499 return (struct f2fs_node *)page_address(page);
502 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
504 return (struct f2fs_nm_info *)(sbi->nm_info);
507 static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
509 return (struct f2fs_sm_info *)(sbi->sm_info);
512 static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
514 return (struct sit_info *)(SM_I(sbi)->sit_info);
517 static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
519 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
522 static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
524 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
527 static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
532 static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
537 static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
539 return le64_to_cpu(cp->checkpoint_ver);
542 static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
544 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
545 return ckpt_flags & f;
548 static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
550 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
552 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
555 static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
557 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
559 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
562 static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
564 down_read(&sbi->cp_rwsem);
567 static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
569 up_read(&sbi->cp_rwsem);
572 static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
574 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
577 static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
579 up_write(&sbi->cp_rwsem);
583 * Check whether the given nid is within node id range.
585 static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
587 WARN_ON((nid >= NM_I(sbi)->max_nid));
588 if (unlikely(nid >= NM_I(sbi)->max_nid))
593 #define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
596 * Check whether the inode has blocks or not
598 static inline int F2FS_HAS_BLOCKS(struct inode *inode)
600 if (F2FS_I(inode)->i_xattr_nid)
601 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
603 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
606 static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
607 struct inode *inode, blkcnt_t count)
609 block_t valid_block_count;
611 spin_lock(&sbi->stat_lock);
613 sbi->total_valid_block_count + (block_t)count;
614 if (unlikely(valid_block_count > sbi->user_block_count)) {
615 spin_unlock(&sbi->stat_lock);
618 inode->i_blocks += count;
619 sbi->total_valid_block_count = valid_block_count;
620 sbi->alloc_valid_block_count += (block_t)count;
621 spin_unlock(&sbi->stat_lock);
625 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
629 spin_lock(&sbi->stat_lock);
630 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
631 f2fs_bug_on(inode->i_blocks < count);
632 inode->i_blocks -= count;
633 sbi->total_valid_block_count -= (block_t)count;
634 spin_unlock(&sbi->stat_lock);
637 static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
639 atomic_inc(&sbi->nr_pages[count_type]);
640 F2FS_SET_SB_DIRT(sbi);
643 static inline void inode_inc_dirty_dents(struct inode *inode)
645 atomic_inc(&F2FS_I(inode)->dirty_dents);
648 static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
650 atomic_dec(&sbi->nr_pages[count_type]);
653 static inline void inode_dec_dirty_dents(struct inode *inode)
655 atomic_dec(&F2FS_I(inode)->dirty_dents);
658 static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
660 return atomic_read(&sbi->nr_pages[count_type]);
663 static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
665 unsigned int pages_per_sec = sbi->segs_per_sec *
666 (1 << sbi->log_blocks_per_seg);
667 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
668 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
671 static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
674 spin_lock(&sbi->stat_lock);
675 ret = sbi->total_valid_block_count;
676 spin_unlock(&sbi->stat_lock);
680 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
682 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
684 /* return NAT or SIT bitmap */
685 if (flag == NAT_BITMAP)
686 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
687 else if (flag == SIT_BITMAP)
688 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
693 static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
695 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
696 int offset = (flag == NAT_BITMAP) ?
697 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
698 return &ckpt->sit_nat_version_bitmap + offset;
701 static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
704 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
705 unsigned long long ckpt_version = cur_cp_version(ckpt);
707 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
710 * odd numbered checkpoint should at cp segment 0
711 * and even segent must be at cp segment 1
713 if (!(ckpt_version & 1))
714 start_addr += sbi->blocks_per_seg;
719 static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
721 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
724 static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
727 block_t valid_block_count;
728 unsigned int valid_node_count;
730 spin_lock(&sbi->stat_lock);
732 valid_block_count = sbi->total_valid_block_count + 1;
733 if (unlikely(valid_block_count > sbi->user_block_count)) {
734 spin_unlock(&sbi->stat_lock);
738 valid_node_count = sbi->total_valid_node_count + 1;
739 if (unlikely(valid_node_count > sbi->total_node_count)) {
740 spin_unlock(&sbi->stat_lock);
747 sbi->alloc_valid_block_count++;
748 sbi->total_valid_node_count++;
749 sbi->total_valid_block_count++;
750 spin_unlock(&sbi->stat_lock);
755 static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
758 spin_lock(&sbi->stat_lock);
760 f2fs_bug_on(!sbi->total_valid_block_count);
761 f2fs_bug_on(!sbi->total_valid_node_count);
762 f2fs_bug_on(!inode->i_blocks);
765 sbi->total_valid_node_count--;
766 sbi->total_valid_block_count--;
768 spin_unlock(&sbi->stat_lock);
771 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
774 spin_lock(&sbi->stat_lock);
775 ret = sbi->total_valid_node_count;
776 spin_unlock(&sbi->stat_lock);
780 static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
782 spin_lock(&sbi->stat_lock);
783 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
784 sbi->total_valid_inode_count++;
785 spin_unlock(&sbi->stat_lock);
788 static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
790 spin_lock(&sbi->stat_lock);
791 f2fs_bug_on(!sbi->total_valid_inode_count);
792 sbi->total_valid_inode_count--;
793 spin_unlock(&sbi->stat_lock);
796 static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
799 spin_lock(&sbi->stat_lock);
800 ret = sbi->total_valid_inode_count;
801 spin_unlock(&sbi->stat_lock);
805 static inline void f2fs_put_page(struct page *page, int unlock)
811 f2fs_bug_on(!PageLocked(page));
814 page_cache_release(page);
817 static inline void f2fs_put_dnode(struct dnode_of_data *dn)
820 f2fs_put_page(dn->node_page, 1);
821 if (dn->inode_page && dn->node_page != dn->inode_page)
822 f2fs_put_page(dn->inode_page, 0);
823 dn->node_page = NULL;
824 dn->inode_page = NULL;
827 static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
828 size_t size, void (*ctor)(void *))
830 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
833 static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
838 entry = kmem_cache_alloc(cachep, flags);
847 #define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
849 static inline bool IS_INODE(struct page *page)
851 struct f2fs_node *p = F2FS_NODE(page);
852 return RAW_IS_INODE(p);
855 static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
857 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
860 static inline block_t datablock_addr(struct page *node_page,
863 struct f2fs_node *raw_node;
865 raw_node = F2FS_NODE(node_page);
866 addr_array = blkaddr_in_node(raw_node);
867 return le32_to_cpu(addr_array[offset]);
870 static inline int f2fs_test_bit(unsigned int nr, char *addr)
875 mask = 1 << (7 - (nr & 0x07));
879 static inline int f2fs_set_bit(unsigned int nr, char *addr)
885 mask = 1 << (7 - (nr & 0x07));
891 static inline int f2fs_clear_bit(unsigned int nr, char *addr)
897 mask = 1 << (7 - (nr & 0x07));
903 /* used for f2fs_inode_info->flags */
905 FI_NEW_INODE, /* indicate newly allocated inode */
906 FI_DIRTY_INODE, /* indicate inode is dirty or not */
907 FI_INC_LINK, /* need to increment i_nlink */
908 FI_ACL_MODE, /* indicate acl mode */
909 FI_NO_ALLOC, /* should not allocate any blocks */
910 FI_UPDATE_DIR, /* should update inode block for consistency */
911 FI_DELAY_IPUT, /* used for the recovery */
912 FI_NO_EXTENT, /* not to use the extent cache */
913 FI_INLINE_XATTR, /* used for inline xattr */
914 FI_INLINE_DATA, /* used for inline data*/
917 static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
919 set_bit(flag, &fi->flags);
922 static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
924 return test_bit(flag, &fi->flags);
927 static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
929 clear_bit(flag, &fi->flags);
932 static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
934 fi->i_acl_mode = mode;
935 set_inode_flag(fi, FI_ACL_MODE);
938 static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
940 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
941 clear_inode_flag(fi, FI_ACL_MODE);
947 static inline void get_inline_info(struct f2fs_inode_info *fi,
948 struct f2fs_inode *ri)
950 if (ri->i_inline & F2FS_INLINE_XATTR)
951 set_inode_flag(fi, FI_INLINE_XATTR);
952 if (ri->i_inline & F2FS_INLINE_DATA)
953 set_inode_flag(fi, FI_INLINE_DATA);
956 static inline void set_raw_inline(struct f2fs_inode_info *fi,
957 struct f2fs_inode *ri)
961 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
962 ri->i_inline |= F2FS_INLINE_XATTR;
963 if (is_inode_flag_set(fi, FI_INLINE_DATA))
964 ri->i_inline |= F2FS_INLINE_DATA;
967 static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
969 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
970 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
971 return DEF_ADDRS_PER_INODE;
974 static inline void *inline_xattr_addr(struct page *page)
976 struct f2fs_inode *ri;
977 ri = (struct f2fs_inode *)page_address(page);
978 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
979 F2FS_INLINE_XATTR_ADDRS]);
982 static inline int inline_xattr_size(struct inode *inode)
984 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
985 return F2FS_INLINE_XATTR_ADDRS << 2;
990 static inline void *inline_data_addr(struct page *page)
992 struct f2fs_inode *ri;
993 ri = (struct f2fs_inode *)page_address(page);
994 return (void *)&(ri->i_addr[1]);
997 static inline int f2fs_readonly(struct super_block *sb)
999 return sb->s_flags & MS_RDONLY;
1005 int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1006 void truncate_data_blocks(struct dnode_of_data *);
1007 void f2fs_truncate(struct inode *);
1008 int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
1009 int f2fs_setattr(struct dentry *, struct iattr *);
1010 int truncate_hole(struct inode *, pgoff_t, pgoff_t);
1011 int truncate_data_blocks_range(struct dnode_of_data *, int);
1012 long f2fs_ioctl(struct file *, unsigned int, unsigned long);
1013 long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
1018 void f2fs_set_inode_flags(struct inode *);
1019 struct inode *f2fs_iget(struct super_block *, unsigned long);
1020 int try_to_free_nats(struct f2fs_sb_info *, int);
1021 void update_inode(struct inode *, struct page *);
1022 int update_inode_page(struct inode *);
1023 int f2fs_write_inode(struct inode *, struct writeback_control *);
1024 void f2fs_evict_inode(struct inode *);
1029 struct dentry *f2fs_get_parent(struct dentry *child);
1034 struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1036 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1037 ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1038 void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1039 struct page *, struct inode *);
1040 int update_dent_inode(struct inode *, const struct qstr *);
1041 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
1042 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1043 int f2fs_make_empty(struct inode *, struct inode *);
1044 bool f2fs_empty_dir(struct inode *);
1046 static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1048 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1055 int f2fs_sync_fs(struct super_block *, int);
1056 extern __printf(3, 4)
1057 void f2fs_msg(struct super_block *, const char *, const char *, ...);
1062 f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
1067 struct dnode_of_data;
1070 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1071 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1072 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1073 int truncate_inode_blocks(struct inode *, pgoff_t);
1074 int truncate_xattr_node(struct inode *, struct page *);
1075 int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1076 void remove_inode_page(struct inode *);
1077 struct page *new_inode_page(struct inode *, const struct qstr *);
1078 struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1079 void ra_node_page(struct f2fs_sb_info *, nid_t);
1080 struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1081 struct page *get_node_page_ra(struct page *, int);
1082 void sync_inode_page(struct dnode_of_data *);
1083 int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1084 bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1085 void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1086 void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1087 void recover_node_page(struct f2fs_sb_info *, struct page *,
1088 struct f2fs_summary *, struct node_info *, block_t);
1089 int recover_inode_page(struct f2fs_sb_info *, struct page *);
1090 int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1091 struct f2fs_summary_block *);
1092 void flush_nat_entries(struct f2fs_sb_info *);
1093 int build_node_manager(struct f2fs_sb_info *);
1094 void destroy_node_manager(struct f2fs_sb_info *);
1095 int __init create_node_manager_caches(void);
1096 void destroy_node_manager_caches(void);
1101 void f2fs_balance_fs(struct f2fs_sb_info *);
1102 void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1103 void invalidate_blocks(struct f2fs_sb_info *, block_t);
1104 void clear_prefree_segments(struct f2fs_sb_info *);
1105 int npages_for_summary_flush(struct f2fs_sb_info *);
1106 void allocate_new_segments(struct f2fs_sb_info *);
1107 struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1108 void write_meta_page(struct f2fs_sb_info *, struct page *);
1109 void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1110 block_t, block_t *);
1111 void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1112 struct f2fs_io_info *);
1113 void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
1114 void recover_data_page(struct f2fs_sb_info *, struct page *,
1115 struct f2fs_summary *, block_t, block_t);
1116 void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1117 struct f2fs_summary *, block_t, block_t);
1118 void allocate_data_block(struct f2fs_sb_info *, struct page *,
1119 block_t, block_t *, struct f2fs_summary *, int);
1120 void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
1121 void write_data_summaries(struct f2fs_sb_info *, block_t);
1122 void write_node_summaries(struct f2fs_sb_info *, block_t);
1123 int lookup_journal_in_cursum(struct f2fs_summary_block *,
1124 int, unsigned int, int);
1125 void flush_sit_entries(struct f2fs_sb_info *);
1126 int build_segment_manager(struct f2fs_sb_info *);
1127 void destroy_segment_manager(struct f2fs_sb_info *);
1128 int __init create_segment_manager_caches(void);
1129 void destroy_segment_manager_caches(void);
1134 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1135 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1136 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1137 int acquire_orphan_inode(struct f2fs_sb_info *);
1138 void release_orphan_inode(struct f2fs_sb_info *);
1139 void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1140 void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1141 void recover_orphan_inodes(struct f2fs_sb_info *);
1142 int get_valid_checkpoint(struct f2fs_sb_info *);
1143 void set_dirty_dir_page(struct inode *, struct page *);
1144 void add_dirty_dir_inode(struct inode *);
1145 void remove_dirty_dir_inode(struct inode *);
1146 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
1147 void sync_dirty_dir_inodes(struct f2fs_sb_info *);
1148 void write_checkpoint(struct f2fs_sb_info *, bool);
1149 void init_orphan_info(struct f2fs_sb_info *);
1150 int __init create_checkpoint_caches(void);
1151 void destroy_checkpoint_caches(void);
1156 void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
1157 int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1158 void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
1159 struct f2fs_io_info *);
1160 int reserve_new_block(struct dnode_of_data *);
1161 int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
1162 void update_extent_cache(block_t, struct dnode_of_data *);
1163 struct page *find_data_page(struct inode *, pgoff_t, bool);
1164 struct page *get_lock_data_page(struct inode *, pgoff_t);
1165 struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1166 int do_write_data_page(struct page *, struct f2fs_io_info *);
1171 int start_gc_thread(struct f2fs_sb_info *);
1172 void stop_gc_thread(struct f2fs_sb_info *);
1173 block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
1174 int f2fs_gc(struct f2fs_sb_info *);
1175 void build_gc_manager(struct f2fs_sb_info *);
1176 int __init create_gc_caches(void);
1177 void destroy_gc_caches(void);
1182 int recover_fsync_data(struct f2fs_sb_info *);
1183 bool space_for_roll_forward(struct f2fs_sb_info *);
1188 #ifdef CONFIG_F2FS_STAT_FS
1189 struct f2fs_stat_info {
1190 struct list_head stat_list;
1191 struct f2fs_sb_info *sbi;
1192 struct mutex stat_lock;
1193 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1194 int main_area_segs, main_area_sections, main_area_zones;
1195 int hit_ext, total_ext;
1196 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1197 int nats, sits, fnids;
1198 int total_count, utilization;
1200 unsigned int valid_count, valid_node_count, valid_inode_count;
1201 unsigned int bimodal, avg_vblocks;
1202 int util_free, util_valid, util_invalid;
1203 int rsvd_segs, overp_segs;
1204 int dirty_count, node_pages, meta_pages;
1205 int prefree_count, call_count;
1206 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1207 int tot_blks, data_blks, node_blks;
1208 int curseg[NR_CURSEG_TYPE];
1209 int cursec[NR_CURSEG_TYPE];
1210 int curzone[NR_CURSEG_TYPE];
1212 unsigned int segment_count[2];
1213 unsigned int block_count[2];
1214 unsigned base_mem, cache_mem;
1217 static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1219 return (struct f2fs_stat_info*)sbi->stat_info;
1222 #define stat_inc_call_count(si) ((si)->call_count++)
1223 #define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1224 #define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1225 #define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1226 #define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1227 #define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1228 #define stat_inc_seg_type(sbi, curseg) \
1229 ((sbi)->segment_count[(curseg)->alloc_type]++)
1230 #define stat_inc_block_count(sbi, curseg) \
1231 ((sbi)->block_count[(curseg)->alloc_type]++)
1233 #define stat_inc_seg_count(sbi, type) \
1235 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1237 if (type == SUM_TYPE_DATA) \
1243 #define stat_inc_tot_blk_count(si, blks) \
1244 (si->tot_blks += (blks))
1246 #define stat_inc_data_blk_count(sbi, blks) \
1248 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1249 stat_inc_tot_blk_count(si, blks); \
1250 si->data_blks += (blks); \
1253 #define stat_inc_node_blk_count(sbi, blks) \
1255 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
1256 stat_inc_tot_blk_count(si, blks); \
1257 si->node_blks += (blks); \
1260 int f2fs_build_stats(struct f2fs_sb_info *);
1261 void f2fs_destroy_stats(struct f2fs_sb_info *);
1262 void __init f2fs_create_root_stats(void);
1263 void f2fs_destroy_root_stats(void);
1265 #define stat_inc_call_count(si)
1266 #define stat_inc_bggc_count(si)
1267 #define stat_inc_dirty_dir(sbi)
1268 #define stat_dec_dirty_dir(sbi)
1269 #define stat_inc_total_hit(sb)
1270 #define stat_inc_read_hit(sb)
1271 #define stat_inc_seg_type(sbi, curseg)
1272 #define stat_inc_block_count(sbi, curseg)
1273 #define stat_inc_seg_count(si, type)
1274 #define stat_inc_tot_blk_count(si, blks)
1275 #define stat_inc_data_blk_count(si, blks)
1276 #define stat_inc_node_blk_count(sbi, blks)
1278 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1279 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1280 static inline void __init f2fs_create_root_stats(void) { }
1281 static inline void f2fs_destroy_root_stats(void) { }
1284 extern const struct file_operations f2fs_dir_operations;
1285 extern const struct file_operations f2fs_file_operations;
1286 extern const struct inode_operations f2fs_file_inode_operations;
1287 extern const struct address_space_operations f2fs_dblock_aops;
1288 extern const struct address_space_operations f2fs_node_aops;
1289 extern const struct address_space_operations f2fs_meta_aops;
1290 extern const struct inode_operations f2fs_dir_inode_operations;
1291 extern const struct inode_operations f2fs_symlink_inode_operations;
1292 extern const struct inode_operations f2fs_special_inode_operations;