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f2fs: remove unneeded version.h header file from f2fs.h
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / fs / f2fs / f2fs.h
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39a53e0c
JK		 1/**
2 * fs/f2fs/f2fs.h
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
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.
10 */
11#ifndef _LINUX_F2FS_H
12#define _LINUX_F2FS_H
13
14#include <linux/types.h>
15#include <linux/page-flags.h>
16#include <linux/buffer_head.h>
39a53e0c
JK		 17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
20
21/*
22 * For mount options
23 */
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
31
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)
35
36#define ver_after(a, b) (typecheck(unsigned long long, a) && \
37 typecheck(unsigned long long, b) && \
38 ((long long)((a) - (b)) > 0))
39
40typedef u64 block_t;
41typedef u32 nid_t;
42
43struct f2fs_mount_info {
44 unsigned int opt;
45};
46
47static inline __u32 f2fs_crc32(void *buff, size_t len)
48{
49 return crc32_le(F2FS_SUPER_MAGIC, buff, len);
50}
51
52static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size)
53{
54 return f2fs_crc32(buff, buff_size) == blk_crc;
55}
56
57/*
58 * For checkpoint manager
59 */
60enum {
61 NAT_BITMAP,
62 SIT_BITMAP
63};
64
65/* for the list of orphan inodes */
66struct orphan_inode_entry {
67 struct list_head list; /* list head */
68 nid_t ino; /* inode number */
69};
70
71/* for the list of directory inodes */
72struct dir_inode_entry {
73 struct list_head list; /* list head */
74 struct inode *inode; /* vfs inode pointer */
75};
76
77/* for the list of fsync inodes, used only during recovery */
78struct 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 */
82};
83
84#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
85#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
86
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)
91
92static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
93{
94 int before = nats_in_cursum(rs);
95 rs->n_nats = cpu_to_le16(before + i);
96 return before;
97}
98
99static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
100{
101 int before = sits_in_cursum(rs);
102 rs->n_sits = cpu_to_le16(before + i);
103 return before;
104}
105
106/*
107 * For INODE and NODE manager
108 */
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.
113 */
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().
118 */
119#define F2FS_LINK_MAX 32000 /* maximum link count per file */
120
121/* for in-memory extent cache entry */
122struct extent_info {
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 */
127};
128
129/*
130 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
131 */
132#define FADVISE_COLD_BIT 0x01
133
134struct 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 */
140
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 */
149};
150
151static inline void get_extent_info(struct extent_info *ext,
152 struct f2fs_extent i_ext)
153{
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);
159}
160
161static inline void set_raw_extent(struct extent_info *ext,
162 struct f2fs_extent *i_ext)
163{
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);
169}
170
171struct 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 */
176
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) */
183
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 */
189
190 /* for checkpoint */
191 char *nat_bitmap; /* NAT bitmap pointer */
192 int bitmap_size; /* bitmap size */
193};
194
195/*
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.
199 */
200struct 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 */
208};
209
210static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
211 struct page *ipage, struct page *npage, nid_t nid)
212{
213 dn->inode = inode;
214 dn->inode_page = ipage;
215 dn->node_page = npage;
216 dn->nid = nid;
217 dn->inode_page_locked = 0;
218}
219
220/*
221 * For SIT manager
222 *
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,
226 * respectively.
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.
232 */
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)
236
237enum {
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 */
244 NO_CHECK_TYPE
245};
246
247struct 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 */
252
253 struct list_head wblist_head; /* list of under-writeback pages */
254 spinlock_t wblist_lock; /* lock for checkpoint */
255
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 */
259
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 */
264};
265
266/*
267 * For directory operation
268 */
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)
274
275/*
276 * For superblock
277 */
278/*
279 * COUNT_TYPE for monitoring
280 *
281 * f2fs monitors the number of several block types such as on-writeback,
282 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
283 */
284enum count_type {
285 F2FS_WRITEBACK,
286 F2FS_DIRTY_DENTS,
287 F2FS_DIRTY_NODES,
288 F2FS_DIRTY_META,
289 NR_COUNT_TYPE,
290};
291
292/*
293 * FS_LOCK nesting subclasses for the lock validator:
294 *
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
298 */
299enum lock_type {
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 */
308 NR_LOCK_TYPE,
309};
310
311/*
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.
321 */
322enum page_type {
323 DATA,
324 NODE,
325 META,
326 NR_PAGE_TYPE,
327 META_FLUSH,
328};
329
330struct 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 */
335
336 /* for node-related operations */
337 struct f2fs_nm_info *nm_info; /* node manager */
338 struct inode *node_inode; /* cache node blocks */
339
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 */
345
346 /* for checkpoint */
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 */
354
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 */
359
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 */
364
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 */
381
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 */
388
389 struct f2fs_mount_info mount_opt; /* mount options */
390
391 /* for cleaning operations */
392 struct mutex gc_mutex; /* mutex for GC */
393 struct f2fs_gc_kthread *gc_thread; /* GC thread */
394
395 /*
396 * for stat information.
397 * one is for the LFS mode, and the other is for the SSR mode.
398 */
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 */
406};
407
408/*
409 * Inline functions
410 */
411static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
412{
413 return container_of(inode, struct f2fs_inode_info, vfs_inode);
414}
415
416static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
417{
418 return sb->s_fs_info;
419}
420
421static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
422{
423 return (struct f2fs_super_block *)(sbi->raw_super);
424}
425
426static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
427{
428 return (struct f2fs_checkpoint *)(sbi->ckpt);
429}
430
431static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
432{
433 return (struct f2fs_nm_info *)(sbi->nm_info);
434}
435
436static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
437{
438 return (struct f2fs_sm_info *)(sbi->sm_info);
439}
440
441static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
442{
443 return (struct sit_info *)(SM_I(sbi)->sit_info);
444}
445
446static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
447{
448 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
449}
450
451static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
452{
453 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
454}
455
456static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
457{
458 sbi->s_dirty = 1;
459}
460
461static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
462{
463 sbi->s_dirty = 0;
464}
465
466static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t)
467{
468 mutex_lock_nested(&sbi->fs_lock[t], t);
469}
470
471static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t)
472{
473 mutex_unlock(&sbi->fs_lock[t]);
474}
475
476/*
477 * Check whether the given nid is within node id range.
478 */
479static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
480{
481 BUG_ON((nid >= NM_I(sbi)->max_nid));
482}
483
484#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
485
486/*
487 * Check whether the inode has blocks or not
488 */
489static inline int F2FS_HAS_BLOCKS(struct inode *inode)
490{
491 if (F2FS_I(inode)->i_xattr_nid)
492 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
493 else
494 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
495}
496
497static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
498 struct inode *inode, blkcnt_t count)
499{
500 block_t valid_block_count;
501
502 spin_lock(&sbi->stat_lock);
503 valid_block_count =
504 sbi->total_valid_block_count + (block_t)count;
505 if (valid_block_count > sbi->user_block_count) {
506 spin_unlock(&sbi->stat_lock);
507 return false;
508 }
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);
513 return true;
514}
515
516static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
517 struct inode *inode,
518 blkcnt_t count)
519{
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);
526 return 0;
527}
528
529static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
530{
531 atomic_inc(&sbi->nr_pages[count_type]);
532 F2FS_SET_SB_DIRT(sbi);
533}
534
535static inline void inode_inc_dirty_dents(struct inode *inode)
536{
537 atomic_inc(&F2FS_I(inode)->dirty_dents);
538}
539
540static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
541{
542 atomic_dec(&sbi->nr_pages[count_type]);
543}
544
545static inline void inode_dec_dirty_dents(struct inode *inode)
546{
547 atomic_dec(&F2FS_I(inode)->dirty_dents);
548}
549
550static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
551{
552 return atomic_read(&sbi->nr_pages[count_type]);
553}
554
555static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
556{
557 block_t ret;
558 spin_lock(&sbi->stat_lock);
559 ret = sbi->total_valid_block_count;
560 spin_unlock(&sbi->stat_lock);
561 return ret;
562}
563
564static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
565{
566 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
567
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);
573
574 return 0;
575}
576
577static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
578{
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;
582}
583
584static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
585{
586 block_t start_addr;
587 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
588 unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
589
590 start_addr = le64_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
591
592 /*
593 * odd numbered checkpoint should at cp segment 0
594 * and even segent must be at cp segment 1
595 */
596 if (!(ckpt_version & 1))
597 start_addr += sbi->blocks_per_seg;
598
599 return start_addr;
600}
601
602static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
603{
604 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
605}
606
607static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
608 struct inode *inode,
609 unsigned int count)
610{
611 block_t valid_block_count;
612 unsigned int valid_node_count;
613
614 spin_lock(&sbi->stat_lock);
615
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;
619
620 if (valid_block_count > sbi->user_block_count) {
621 spin_unlock(&sbi->stat_lock);
622 return false;
623 }
624
625 if (valid_node_count > sbi->total_node_count) {
626 spin_unlock(&sbi->stat_lock);
627 return false;
628 }
629
630 if (inode)
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);
635
636 return true;
637}
638
639static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
640 struct inode *inode,
641 unsigned int count)
642{
643 spin_lock(&sbi->stat_lock);
644
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);
648
649 inode->i_blocks -= count;
650 sbi->total_valid_node_count -= count;
651 sbi->total_valid_block_count -= (block_t)count;
652
653 spin_unlock(&sbi->stat_lock);
654}
655
656static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
657{
658 unsigned int ret;
659 spin_lock(&sbi->stat_lock);
660 ret = sbi->total_valid_node_count;
661 spin_unlock(&sbi->stat_lock);
662 return ret;
663}
664
665static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
666{
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);
671}
672
673static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
674{
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);
679 return 0;
680}
681
682static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
683{
684 unsigned int ret;
685 spin_lock(&sbi->stat_lock);
686 ret = sbi->total_valid_inode_count;
687 spin_unlock(&sbi->stat_lock);
688 return ret;
689}
690
691static inline void f2fs_put_page(struct page *page, int unlock)
692{
693 if (!page || IS_ERR(page))
694 return;
695
696 if (unlock) {
697 BUG_ON(!PageLocked(page));
698 unlock_page(page);
699 }
700 page_cache_release(page);
701}
702
703static inline void f2fs_put_dnode(struct dnode_of_data *dn)
704{
705 if (dn->node_page)
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;
711}
712
713static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
714 size_t size, void (*ctor)(void *))
715{
716 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
717}
718
719#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
720
721static inline bool IS_INODE(struct page *page)
722{
723 struct f2fs_node *p = (struct f2fs_node *)page_address(page);
724 return RAW_IS_INODE(p);
725}
726
727static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
728{
729 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
730}
731
732static inline block_t datablock_addr(struct page *node_page,
733 unsigned int offset)
734{
735 struct f2fs_node *raw_node;
736 __le32 *addr_array;
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]);
740}
741
742static inline int f2fs_test_bit(unsigned int nr, char *addr)
743{
744 int mask;
745
746 addr += (nr >> 3);
747 mask = 1 << (7 - (nr & 0x07));
748 return mask & *addr;
749}
750
751static inline int f2fs_set_bit(unsigned int nr, char *addr)
752{
753 int mask;
754 int ret;
755
756 addr += (nr >> 3);
757 mask = 1 << (7 - (nr & 0x07));
758 ret = mask & *addr;
759 *addr |= mask;
760 return ret;
761}
762
763static inline int f2fs_clear_bit(unsigned int nr, char *addr)
764{
765 int mask;
766 int ret;
767
768 addr += (nr >> 3);
769 mask = 1 << (7 - (nr & 0x07));
770 ret = mask & *addr;
771 *addr &= ~mask;
772 return ret;
773}
774
775/* used for f2fs_inode_info->flags */
776enum {
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 */
782};
783
784static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
785{
786 set_bit(flag, &fi->flags);
787}
788
789static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
790{
791 return test_bit(flag, &fi->flags);
792}
793
794static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
795{
796 clear_bit(flag, &fi->flags);
797}
798
799static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
800{
801 fi->i_acl_mode = mode;
802 set_inode_flag(fi, FI_ACL_MODE);
803}
804
805static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
806{
807 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
808 clear_inode_flag(fi, FI_ACL_MODE);
809 return 1;
810 }
811 return 0;
812}
813
814/*
815 * file.c
816 */
817int f2fs_sync_file(struct file *, loff_t, loff_t, int);
818void truncate_data_blocks(struct dnode_of_data *);
819void f2fs_truncate(struct inode *);
820int f2fs_setattr(struct dentry *, struct iattr *);
821int truncate_hole(struct inode *, pgoff_t, pgoff_t);
822long f2fs_ioctl(struct file *, unsigned int, unsigned long);
823
824/*
825 * inode.c
826 */
827void f2fs_set_inode_flags(struct inode *);
828struct inode *f2fs_iget_nowait(struct super_block *, unsigned long);
829struct inode *f2fs_iget(struct super_block *, unsigned long);
830void update_inode(struct inode *, struct page *);
831int f2fs_write_inode(struct inode *, struct writeback_control *);
832void f2fs_evict_inode(struct inode *);
833
834/*
835 * namei.c
836 */
837struct dentry *f2fs_get_parent(struct dentry *child);
838
839/*
840 * dir.c
841 */
842struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
843 struct page **);
844struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
845ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
846void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
847 struct page *, struct inode *);
848void init_dent_inode(struct dentry *, struct page *);
849int f2fs_add_link(struct dentry *, struct inode *);
850void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
851int f2fs_make_empty(struct inode *, struct inode *);
852bool f2fs_empty_dir(struct inode *);
853
854/*
855 * super.c
856 */
857int f2fs_sync_fs(struct super_block *, int);
858
859/*
860 * hash.c
861 */
862f2fs_hash_t f2fs_dentry_hash(const char *, int);
863
864/*
865 * node.c
866 */
867struct dnode_of_data;
868struct node_info;
869
870int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
871void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
872int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
873int truncate_inode_blocks(struct inode *, pgoff_t);
874int remove_inode_page(struct inode *);
875int new_inode_page(struct inode *, struct dentry *);
876struct page *new_node_page(struct dnode_of_data *, unsigned int);
877void ra_node_page(struct f2fs_sb_info *, nid_t);
878struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
879struct page *get_node_page_ra(struct page *, int);
880void sync_inode_page(struct dnode_of_data *);
881int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
882bool alloc_nid(struct f2fs_sb_info *, nid_t *);
883void alloc_nid_done(struct f2fs_sb_info *, nid_t);
884void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
885void recover_node_page(struct f2fs_sb_info *, struct page *,
886 struct f2fs_summary *, struct node_info *, block_t);
887int recover_inode_page(struct f2fs_sb_info *, struct page *);
888int restore_node_summary(struct f2fs_sb_info *, unsigned int,
889 struct f2fs_summary_block *);
890void flush_nat_entries(struct f2fs_sb_info *);
891int build_node_manager(struct f2fs_sb_info *);
892void destroy_node_manager(struct f2fs_sb_info *);
893int create_node_manager_caches(void);
894void destroy_node_manager_caches(void);
895
896/*
897 * segment.c
898 */
899void f2fs_balance_fs(struct f2fs_sb_info *);
900void invalidate_blocks(struct f2fs_sb_info *, block_t);
901void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
902void clear_prefree_segments(struct f2fs_sb_info *);
903int npages_for_summary_flush(struct f2fs_sb_info *);
904void allocate_new_segments(struct f2fs_sb_info *);
905struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
906struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t);
907void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
908int write_meta_page(struct f2fs_sb_info *, struct page *,
909 struct writeback_control *);
910void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
911 block_t, block_t *);
912void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
913 block_t, block_t *);
914void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
915void recover_data_page(struct f2fs_sb_info *, struct page *,
916 struct f2fs_summary *, block_t, block_t);
917void rewrite_node_page(struct f2fs_sb_info *, struct page *,
918 struct f2fs_summary *, block_t, block_t);
919void write_data_summaries(struct f2fs_sb_info *, block_t);
920void write_node_summaries(struct f2fs_sb_info *, block_t);
921int lookup_journal_in_cursum(struct f2fs_summary_block *,
922 int, unsigned int, int);
923void flush_sit_entries(struct f2fs_sb_info *);
924int build_segment_manager(struct f2fs_sb_info *);
925void reset_victim_segmap(struct f2fs_sb_info *);
926void destroy_segment_manager(struct f2fs_sb_info *);
927
928/*
929 * checkpoint.c
930 */
931struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
932struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
933long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
934int check_orphan_space(struct f2fs_sb_info *);
935void add_orphan_inode(struct f2fs_sb_info *, nid_t);
936void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
937int recover_orphan_inodes(struct f2fs_sb_info *);
938int get_valid_checkpoint(struct f2fs_sb_info *);
939void set_dirty_dir_page(struct inode *, struct page *);
940void remove_dirty_dir_inode(struct inode *);
941void sync_dirty_dir_inodes(struct f2fs_sb_info *);
942void block_operations(struct f2fs_sb_info *);
943void write_checkpoint(struct f2fs_sb_info *, bool, bool);
944void init_orphan_info(struct f2fs_sb_info *);
945int create_checkpoint_caches(void);
946void destroy_checkpoint_caches(void);
947
948/*
949 * data.c
950 */
951int reserve_new_block(struct dnode_of_data *);
952void update_extent_cache(block_t, struct dnode_of_data *);
953struct page *find_data_page(struct inode *, pgoff_t);
954struct page *get_lock_data_page(struct inode *, pgoff_t);
955struct page *get_new_data_page(struct inode *, pgoff_t, bool);
956int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
957int do_write_data_page(struct page *);
958
959/*
960 * gc.c
961 */
962int start_gc_thread(struct f2fs_sb_info *);
963void stop_gc_thread(struct f2fs_sb_info *);
964block_t start_bidx_of_node(unsigned int);
965int f2fs_gc(struct f2fs_sb_info *, int);
966void build_gc_manager(struct f2fs_sb_info *);
967int create_gc_caches(void);
968void destroy_gc_caches(void);
969
970/*
971 * recovery.c
972 */
973void recover_fsync_data(struct f2fs_sb_info *);
974bool space_for_roll_forward(struct f2fs_sb_info *);
975
976/*
977 * debug.c
978 */
979#ifdef CONFIG_F2FS_STAT_FS
980struct 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;
990 int bg_gc;
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];
1002
1003 unsigned int segment_count[2];
1004 unsigned int block_count[2];
1005 unsigned base_mem, cache_mem;
1006};
1007
1008#define stat_inc_call_count(si) ((si)->call_count++)
1009
1010#define stat_inc_seg_count(sbi, type) \
1011 do { \
1012 struct f2fs_stat_info *si = sbi->stat_info; \
1013 (si)->tot_segs++; \
1014 if (type == SUM_TYPE_DATA) \
1015 si->data_segs++; \
1016 else \
1017 si->node_segs++; \
1018 } while (0)
1019
1020#define stat_inc_tot_blk_count(si, blks) \
1021 (si->tot_blks += (blks))
1022
1023#define stat_inc_data_blk_count(sbi, blks) \
1024 do { \
1025 struct f2fs_stat_info *si = sbi->stat_info; \
1026 stat_inc_tot_blk_count(si, blks); \
1027 si->data_blks += (blks); \
1028 } while (0)
1029
1030#define stat_inc_node_blk_count(sbi, blks) \
1031 do { \
1032 struct f2fs_stat_info *si = sbi->stat_info; \
1033 stat_inc_tot_blk_count(si, blks); \
1034 si->node_blks += (blks); \
1035 } while (0)
1036
1037int f2fs_build_stats(struct f2fs_sb_info *);
1038void f2fs_destroy_stats(struct f2fs_sb_info *);
1039void destroy_root_stats(void);
1040#else
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)
1046
1047static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1048static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
1049static inline void destroy_root_stats(void) { }
1050#endif
1051
1052extern const struct file_operations f2fs_dir_operations;
1053extern const struct file_operations f2fs_file_operations;
1054extern const struct inode_operations f2fs_file_inode_operations;
1055extern const struct address_space_operations f2fs_dblock_aops;
1056extern const struct address_space_operations f2fs_node_aops;
1057extern const struct address_space_operations f2fs_meta_aops;
1058extern const struct inode_operations f2fs_dir_inode_operations;
1059extern const struct inode_operations f2fs_symlink_inode_operations;
1060extern const struct inode_operations f2fs_special_inode_operations;
1061#endif