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Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09002 * 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>
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090017#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
Jaegeuk Kimc2d715d2013-08-08 15:56:49 +090020#include <linux/kobject.h>
Gu Zheng7bd59382013-10-22 14:52:26 +080021#include <linux/sched.h>
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090022
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090023#ifdef CONFIG_F2FS_CHECK_FS
24#define f2fs_bug_on(condition) BUG_ON(condition)
Jaegeuk Kim0daaad92013-11-24 13:50:35 +090025#define f2fs_down_write(x, y) down_write_nest_lock(x, y)
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090026#else
27#define f2fs_bug_on(condition)
Jaegeuk Kim0daaad92013-11-24 13:50:35 +090028#define f2fs_down_write(x, y) down_write(x)
Jaegeuk Kim5d56b672013-10-29 15:14:54 +090029#endif
30
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090031/*
32 * For mount options
33 */
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
Jaegeuk Kim444c5802013-08-08 15:16:22 +090041#define F2FS_MOUNT_INLINE_XATTR 0x00000080
Huajun Li1001b342013-11-10 23:13:16 +080042#define F2FS_MOUNT_INLINE_DATA 0x00000100
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090043
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)
47
48#define ver_after(a, b) (typecheck(unsigned long long, a) && \
49 typecheck(unsigned long long, b) && \
50 ((long long)((a) - (b)) > 0))
51
Jaegeuk Kima9841c42013-05-24 12:41:04 +090052typedef u32 block_t; /*
53 * should not change u32, since it is the on-disk block
54 * address format, __le32.
55 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090056typedef u32 nid_t;
57
58struct f2fs_mount_info {
59 unsigned int opt;
60};
61
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090062#define CRCPOLY_LE 0xedb88320
63
64static inline __u32 f2fs_crc32(void *buf, size_t len)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090065{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090066 unsigned char *p = (unsigned char *)buf;
67 __u32 crc = F2FS_SUPER_MAGIC;
68 int i;
69
70 while (len--) {
71 crc ^= *p++;
72 for (i = 0; i < 8; i++)
73 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
74 }
75 return crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090076}
77
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090078static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090079{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090080 return f2fs_crc32(buf, buf_size) == blk_crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090081}
82
83/*
84 * For checkpoint manager
85 */
86enum {
87 NAT_BITMAP,
88 SIT_BITMAP
89};
90
91/* for the list of orphan inodes */
92struct orphan_inode_entry {
93 struct list_head list; /* list head */
94 nid_t ino; /* inode number */
95};
96
97/* for the list of directory inodes */
98struct dir_inode_entry {
99 struct list_head list; /* list head */
100 struct inode *inode; /* vfs inode pointer */
101};
102
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900103/* for the list of blockaddresses to be discarded */
104struct 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 */
108};
109
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900110/* for the list of fsync inodes, used only during recovery */
111struct 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 */
115};
116
117#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
118#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
119
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)
124
125static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
126{
127 int before = nats_in_cursum(rs);
128 rs->n_nats = cpu_to_le16(before + i);
129 return before;
130}
131
132static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
133{
134 int before = sits_in_cursum(rs);
135 rs->n_sits = cpu_to_le16(before + i);
136 return before;
137}
138
139/*
Namjae Jeone9750822013-02-04 23:41:41 +0900140 * ioctl commands
141 */
142#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
143#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
144
145#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
146/*
147 * ioctl commands in 32 bit emulation
148 */
149#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
150#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
151#endif
152
153/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900154 * For INODE and NODE manager
155 */
Jaegeuk Kimdbe6a5f2013-08-09 08:14:06 +0900156/*
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.
160 */
161#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
162 >> OFFSET_BIT_SHIFT)
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900163enum {
164 ALLOC_NODE, /* allocate a new node page if needed */
165 LOOKUP_NODE, /* look up a node without readahead */
166 LOOKUP_NODE_RA, /*
167 * look up a node with readahead called
168 * by get_datablock_ro.
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900169 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900170};
171
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900172#define F2FS_LINK_MAX 32000 /* maximum link count per file */
173
174/* for in-memory extent cache entry */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900175#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
176
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900177struct extent_info {
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 */
Masanari Iida111d2492013-03-19 08:03:35 +0900181 unsigned int len; /* length of the extent */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900182};
183
184/*
185 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
186 */
187#define FADVISE_COLD_BIT 0x01
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900188#define FADVISE_LOST_PINO_BIT 0x02
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900189
190struct 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 */
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900195 unsigned int i_pino; /* parent inode number */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900196 umode_t i_acl_mode; /* keep file acl mode temporarily */
197
198 /* Use below internally in f2fs*/
199 unsigned long flags; /* use to pass per-file flags */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900200 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 */
Jaegeuk Kime518ff82013-08-09 14:46:15 +0900204 unsigned long long xattr_ver; /* cp version of xattr modification */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900205 struct extent_info ext; /* in-memory extent cache entry */
206};
207
208static inline void get_extent_info(struct extent_info *ext,
209 struct f2fs_extent i_ext)
210{
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);
216}
217
218static inline void set_raw_extent(struct extent_info *ext,
219 struct f2fs_extent *i_ext)
220{
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);
226}
227
228struct f2fs_nm_info {
229 block_t nat_blkaddr; /* base disk address of NAT */
230 nid_t max_nid; /* maximum possible node ids */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900231 nid_t next_scan_nid; /* the next nid to be scanned */
232
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) */
239
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 */
245
246 /* for checkpoint */
247 char *nat_bitmap; /* NAT bitmap pointer */
248 int bitmap_size; /* bitmap size */
249};
250
251/*
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.
255 */
256struct 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 */
264};
265
266static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
267 struct page *ipage, struct page *npage, nid_t nid)
268{
Jaegeuk Kimd66d1f72013-01-03 08:57:21 +0900269 memset(dn, 0, sizeof(*dn));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900270 dn->inode = inode;
271 dn->inode_page = ipage;
272 dn->node_page = npage;
273 dn->nid = nid;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900274}
275
276/*
277 * For SIT manager
278 *
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,
282 * respectively.
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.
288 */
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)
292
293enum {
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 */
300 NO_CHECK_TYPE
301};
302
303struct 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 */
308
309 struct list_head wblist_head; /* list of under-writeback pages */
310 spinlock_t wblist_lock; /* lock for checkpoint */
311
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 */
315
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 */
Jaegeuk Kim81eb8d62013-10-24 13:31:34 +0900320
321 /* a threshold to reclaim prefree segments */
322 unsigned int rec_prefree_segments;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900323
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 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900328};
329
330/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900331 * For superblock
332 */
333/*
334 * COUNT_TYPE for monitoring
335 *
336 * f2fs monitors the number of several block types such as on-writeback,
337 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
338 */
339enum count_type {
340 F2FS_WRITEBACK,
341 F2FS_DIRTY_DENTS,
342 F2FS_DIRTY_NODES,
343 F2FS_DIRTY_META,
344 NR_COUNT_TYPE,
345};
346
347/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900348 * The below are the page types of bios used in submti_bio().
349 * The available types are:
350 * DATA User data pages. It operates as async mode.
351 * NODE Node pages. It operates as async mode.
352 * META FS metadata pages such as SIT, NAT, CP.
353 * NR_PAGE_TYPE The number of page types.
354 * META_FLUSH Make sure the previous pages are written
355 * with waiting the bio's completion
356 * ... Only can be used with META.
357 */
Jaegeuk Kim7d5e5102013-11-18 17:13:35 +0900358#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900359enum page_type {
360 DATA,
361 NODE,
362 META,
363 NR_PAGE_TYPE,
364 META_FLUSH,
365};
366
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900367struct f2fs_io_info {
368 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
369 int rw; /* contains R/RS/W/WS */
370 int rw_flag; /* contains REQ_META/REQ_PRIO */
371};
372
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +0900373#define is_read_io(rw) (((rw) & 1) == READ)
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900374struct f2fs_bio_info {
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900375 struct f2fs_sb_info *sbi; /* f2fs superblock */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900376 struct bio *bio; /* bios to merge */
377 sector_t last_block_in_bio; /* last block number */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900378 struct f2fs_io_info fio; /* store buffered io info. */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900379 struct mutex io_mutex; /* mutex for bio */
380};
381
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900382struct f2fs_sb_info {
383 struct super_block *sb; /* pointer to VFS super block */
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900384 struct proc_dir_entry *s_proc; /* proc entry */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900385 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
386 struct f2fs_super_block *raw_super; /* raw super block pointer */
387 int s_dirty; /* dirty flag for checkpoint */
388
389 /* for node-related operations */
390 struct f2fs_nm_info *nm_info; /* node manager */
391 struct inode *node_inode; /* cache node blocks */
392
393 /* for segment-related operations */
394 struct f2fs_sm_info *sm_info; /* segment manager */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900395
396 /* for bio operations */
Chao Yu924b7202013-11-20 14:46:39 +0800397 struct f2fs_bio_info read_io; /* for read bios */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900398 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900399
400 /* for checkpoint */
401 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
402 struct inode *meta_inode; /* cache meta blocks */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900403 struct mutex cp_mutex; /* checkpoint procedure lock */
Gu Zhenge4795562013-09-27 18:08:30 +0800404 struct rw_semaphore cp_rwsem; /* blocking FS operations */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900405 struct mutex node_write; /* locking node writes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900406 struct mutex writepages; /* mutex for writepages() */
Haicheng Liaabe5132013-10-23 12:39:32 +0800407 bool por_doing; /* recovery is doing or not */
408 bool on_build_free_nids; /* build_free_nids is doing */
Changman Leefb51b5e2013-11-07 12:48:25 +0900409 wait_queue_head_t cp_wait;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900410
411 /* for orphan inode management */
412 struct list_head orphan_inode_list; /* orphan inode list */
413 struct mutex orphan_inode_mutex; /* for orphan inode list */
414 unsigned int n_orphans; /* # of orphan inodes */
415
416 /* for directory inode management */
417 struct list_head dir_inode_list; /* dir inode list */
418 spinlock_t dir_inode_lock; /* for dir inode list lock */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900419
420 /* basic file system units */
421 unsigned int log_sectors_per_block; /* log2 sectors per block */
422 unsigned int log_blocksize; /* log2 block size */
423 unsigned int blocksize; /* block size */
424 unsigned int root_ino_num; /* root inode number*/
425 unsigned int node_ino_num; /* node inode number*/
426 unsigned int meta_ino_num; /* meta inode number*/
427 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
428 unsigned int blocks_per_seg; /* blocks per segment */
429 unsigned int segs_per_sec; /* segments per section */
430 unsigned int secs_per_zone; /* sections per zone */
431 unsigned int total_sections; /* total section count */
432 unsigned int total_node_count; /* total node block count */
433 unsigned int total_valid_node_count; /* valid node block count */
434 unsigned int total_valid_inode_count; /* valid inode count */
435 int active_logs; /* # of active logs */
436
437 block_t user_block_count; /* # of user blocks */
438 block_t total_valid_block_count; /* # of valid blocks */
439 block_t alloc_valid_block_count; /* # of allocated blocks */
440 block_t last_valid_block_count; /* for recovery */
441 u32 s_next_generation; /* for NFS support */
442 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
443
444 struct f2fs_mount_info mount_opt; /* mount options */
445
446 /* for cleaning operations */
447 struct mutex gc_mutex; /* mutex for GC */
448 struct f2fs_gc_kthread *gc_thread; /* GC thread */
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900449 unsigned int cur_victim_sec; /* current victim section num */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900450
451 /*
452 * for stat information.
453 * one is for the LFS mode, and the other is for the SSR mode.
454 */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900455#ifdef CONFIG_F2FS_STAT_FS
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900456 struct f2fs_stat_info *stat_info; /* FS status information */
457 unsigned int segment_count[2]; /* # of allocated segments */
458 unsigned int block_count[2]; /* # of allocated blocks */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900459 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
460 int bg_gc; /* background gc calls */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900461 unsigned int n_dirty_dirs; /* # of dir inodes */
462#endif
463 unsigned int last_victim[2]; /* last victim segment # */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900464 spinlock_t stat_lock; /* lock for stat operations */
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900465
466 /* For sysfs suppport */
467 struct kobject s_kobj;
468 struct completion s_kobj_unregister;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900469};
470
471/*
472 * Inline functions
473 */
474static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
475{
476 return container_of(inode, struct f2fs_inode_info, vfs_inode);
477}
478
479static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
480{
481 return sb->s_fs_info;
482}
483
484static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
485{
486 return (struct f2fs_super_block *)(sbi->raw_super);
487}
488
489static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
490{
491 return (struct f2fs_checkpoint *)(sbi->ckpt);
492}
493
Gu Zheng45590712013-07-15 17:57:38 +0800494static inline struct f2fs_node *F2FS_NODE(struct page *page)
495{
496 return (struct f2fs_node *)page_address(page);
497}
498
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900499static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
500{
501 return (struct f2fs_nm_info *)(sbi->nm_info);
502}
503
504static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
505{
506 return (struct f2fs_sm_info *)(sbi->sm_info);
507}
508
509static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
510{
511 return (struct sit_info *)(SM_I(sbi)->sit_info);
512}
513
514static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
515{
516 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
517}
518
519static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
520{
521 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
522}
523
524static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
525{
526 sbi->s_dirty = 1;
527}
528
529static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
530{
531 sbi->s_dirty = 0;
532}
533
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900534static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
535{
536 return le64_to_cpu(cp->checkpoint_ver);
537}
538
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900539static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
540{
541 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
542 return ckpt_flags & f;
543}
544
545static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
546{
547 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
548 ckpt_flags |= f;
549 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
550}
551
552static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
553{
554 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
555 ckpt_flags &= (~f);
556 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
557}
558
Gu Zhenge4795562013-09-27 18:08:30 +0800559static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900560{
Gu Zhenge4795562013-09-27 18:08:30 +0800561 down_read(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900562}
563
Gu Zhenge4795562013-09-27 18:08:30 +0800564static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900565{
Gu Zhenge4795562013-09-27 18:08:30 +0800566 up_read(&sbi->cp_rwsem);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900567}
568
Gu Zhenge4795562013-09-27 18:08:30 +0800569static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900570{
Jaegeuk Kim0daaad92013-11-24 13:50:35 +0900571 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900572}
573
Gu Zhenge4795562013-09-27 18:08:30 +0800574static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900575{
Gu Zhenge4795562013-09-27 18:08:30 +0800576 up_write(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900577}
578
579/*
580 * Check whether the given nid is within node id range.
581 */
Namjae Jeon064e0822013-03-17 17:27:20 +0900582static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900583{
Namjae Jeon064e0822013-03-17 17:27:20 +0900584 WARN_ON((nid >= NM_I(sbi)->max_nid));
Chao Yucfb271d2013-12-05 17:15:22 +0800585 if (unlikely(nid >= NM_I(sbi)->max_nid))
Namjae Jeon064e0822013-03-17 17:27:20 +0900586 return -EINVAL;
587 return 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900588}
589
590#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
591
592/*
593 * Check whether the inode has blocks or not
594 */
595static inline int F2FS_HAS_BLOCKS(struct inode *inode)
596{
597 if (F2FS_I(inode)->i_xattr_nid)
598 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
599 else
600 return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
601}
602
603static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
604 struct inode *inode, blkcnt_t count)
605{
606 block_t valid_block_count;
607
608 spin_lock(&sbi->stat_lock);
609 valid_block_count =
610 sbi->total_valid_block_count + (block_t)count;
Chao Yucfb271d2013-12-05 17:15:22 +0800611 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900612 spin_unlock(&sbi->stat_lock);
613 return false;
614 }
615 inode->i_blocks += count;
616 sbi->total_valid_block_count = valid_block_count;
617 sbi->alloc_valid_block_count += (block_t)count;
618 spin_unlock(&sbi->stat_lock);
619 return true;
620}
621
Gu Zhengda19b0d2013-11-19 18:03:27 +0800622static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900623 struct inode *inode,
624 blkcnt_t count)
625{
626 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900627 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
628 f2fs_bug_on(inode->i_blocks < count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900629 inode->i_blocks -= count;
630 sbi->total_valid_block_count -= (block_t)count;
631 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900632}
633
634static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
635{
636 atomic_inc(&sbi->nr_pages[count_type]);
637 F2FS_SET_SB_DIRT(sbi);
638}
639
640static inline void inode_inc_dirty_dents(struct inode *inode)
641{
642 atomic_inc(&F2FS_I(inode)->dirty_dents);
643}
644
645static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
646{
647 atomic_dec(&sbi->nr_pages[count_type]);
648}
649
650static inline void inode_dec_dirty_dents(struct inode *inode)
651{
652 atomic_dec(&F2FS_I(inode)->dirty_dents);
653}
654
655static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
656{
657 return atomic_read(&sbi->nr_pages[count_type]);
658}
659
Namjae Jeon5ac206c2013-02-02 23:52:59 +0900660static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
661{
662 unsigned int pages_per_sec = sbi->segs_per_sec *
663 (1 << sbi->log_blocks_per_seg);
664 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
665 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
666}
667
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900668static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
669{
670 block_t ret;
671 spin_lock(&sbi->stat_lock);
672 ret = sbi->total_valid_block_count;
673 spin_unlock(&sbi->stat_lock);
674 return ret;
675}
676
677static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
678{
679 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
680
681 /* return NAT or SIT bitmap */
682 if (flag == NAT_BITMAP)
683 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
684 else if (flag == SIT_BITMAP)
685 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
686
687 return 0;
688}
689
690static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
691{
692 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900693 int offset = (flag == NAT_BITMAP) ?
694 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900695 return &ckpt->sit_nat_version_bitmap + offset;
696}
697
698static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
699{
700 block_t start_addr;
701 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900702 unsigned long long ckpt_version = cur_cp_version(ckpt);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900703
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900704 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900705
706 /*
707 * odd numbered checkpoint should at cp segment 0
708 * and even segent must be at cp segment 1
709 */
710 if (!(ckpt_version & 1))
711 start_addr += sbi->blocks_per_seg;
712
713 return start_addr;
714}
715
716static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
717{
718 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
719}
720
721static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800722 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900723{
724 block_t valid_block_count;
725 unsigned int valid_node_count;
726
727 spin_lock(&sbi->stat_lock);
728
Gu Zhengef86d702013-11-19 18:03:38 +0800729 valid_block_count = sbi->total_valid_block_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800730 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900731 spin_unlock(&sbi->stat_lock);
732 return false;
733 }
734
Gu Zhengef86d702013-11-19 18:03:38 +0800735 valid_node_count = sbi->total_valid_node_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800736 if (unlikely(valid_node_count > sbi->total_node_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900737 spin_unlock(&sbi->stat_lock);
738 return false;
739 }
740
741 if (inode)
Gu Zhengef86d702013-11-19 18:03:38 +0800742 inode->i_blocks++;
743
744 sbi->alloc_valid_block_count++;
745 sbi->total_valid_node_count++;
746 sbi->total_valid_block_count++;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900747 spin_unlock(&sbi->stat_lock);
748
749 return true;
750}
751
752static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800753 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900754{
755 spin_lock(&sbi->stat_lock);
756
Gu Zhengef86d702013-11-19 18:03:38 +0800757 f2fs_bug_on(!sbi->total_valid_block_count);
758 f2fs_bug_on(!sbi->total_valid_node_count);
759 f2fs_bug_on(!inode->i_blocks);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900760
Gu Zhengef86d702013-11-19 18:03:38 +0800761 inode->i_blocks--;
762 sbi->total_valid_node_count--;
763 sbi->total_valid_block_count--;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900764
765 spin_unlock(&sbi->stat_lock);
766}
767
768static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
769{
770 unsigned int ret;
771 spin_lock(&sbi->stat_lock);
772 ret = sbi->total_valid_node_count;
773 spin_unlock(&sbi->stat_lock);
774 return ret;
775}
776
777static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
778{
779 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900780 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900781 sbi->total_valid_inode_count++;
782 spin_unlock(&sbi->stat_lock);
783}
784
Jaegeuk Kim0e802202013-11-26 16:36:20 +0900785static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900786{
787 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900788 f2fs_bug_on(!sbi->total_valid_inode_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900789 sbi->total_valid_inode_count--;
790 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900791}
792
793static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
794{
795 unsigned int ret;
796 spin_lock(&sbi->stat_lock);
797 ret = sbi->total_valid_inode_count;
798 spin_unlock(&sbi->stat_lock);
799 return ret;
800}
801
802static inline void f2fs_put_page(struct page *page, int unlock)
803{
Jaegeuk Kim031fa8c2013-11-28 12:55:13 +0900804 if (!page)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900805 return;
806
807 if (unlock) {
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900808 f2fs_bug_on(!PageLocked(page));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900809 unlock_page(page);
810 }
811 page_cache_release(page);
812}
813
814static inline void f2fs_put_dnode(struct dnode_of_data *dn)
815{
816 if (dn->node_page)
817 f2fs_put_page(dn->node_page, 1);
818 if (dn->inode_page && dn->node_page != dn->inode_page)
819 f2fs_put_page(dn->inode_page, 0);
820 dn->node_page = NULL;
821 dn->inode_page = NULL;
822}
823
824static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
825 size_t size, void (*ctor)(void *))
826{
827 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
828}
829
Gu Zheng7bd59382013-10-22 14:52:26 +0800830static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
831 gfp_t flags)
832{
833 void *entry;
834retry:
835 entry = kmem_cache_alloc(cachep, flags);
836 if (!entry) {
837 cond_resched();
838 goto retry;
839 }
840
841 return entry;
842}
843
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900844#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
845
846static inline bool IS_INODE(struct page *page)
847{
Gu Zheng45590712013-07-15 17:57:38 +0800848 struct f2fs_node *p = F2FS_NODE(page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900849 return RAW_IS_INODE(p);
850}
851
852static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
853{
854 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
855}
856
857static inline block_t datablock_addr(struct page *node_page,
858 unsigned int offset)
859{
860 struct f2fs_node *raw_node;
861 __le32 *addr_array;
Gu Zheng45590712013-07-15 17:57:38 +0800862 raw_node = F2FS_NODE(node_page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900863 addr_array = blkaddr_in_node(raw_node);
864 return le32_to_cpu(addr_array[offset]);
865}
866
867static inline int f2fs_test_bit(unsigned int nr, char *addr)
868{
869 int mask;
870
871 addr += (nr >> 3);
872 mask = 1 << (7 - (nr & 0x07));
873 return mask & *addr;
874}
875
876static inline int f2fs_set_bit(unsigned int nr, char *addr)
877{
878 int mask;
879 int ret;
880
881 addr += (nr >> 3);
882 mask = 1 << (7 - (nr & 0x07));
883 ret = mask & *addr;
884 *addr |= mask;
885 return ret;
886}
887
888static inline int f2fs_clear_bit(unsigned int nr, char *addr)
889{
890 int mask;
891 int ret;
892
893 addr += (nr >> 3);
894 mask = 1 << (7 - (nr & 0x07));
895 ret = mask & *addr;
896 *addr &= ~mask;
897 return ret;
898}
899
900/* used for f2fs_inode_info->flags */
901enum {
902 FI_NEW_INODE, /* indicate newly allocated inode */
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900903 FI_DIRTY_INODE, /* indicate inode is dirty or not */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900904 FI_INC_LINK, /* need to increment i_nlink */
905 FI_ACL_MODE, /* indicate acl mode */
906 FI_NO_ALLOC, /* should not allocate any blocks */
Jaegeuk Kim699489b2013-06-07 22:08:23 +0900907 FI_UPDATE_DIR, /* should update inode block for consistency */
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900908 FI_DELAY_IPUT, /* used for the recovery */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900909 FI_NO_EXTENT, /* not to use the extent cache */
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900910 FI_INLINE_XATTR, /* used for inline xattr */
Huajun Li1001b342013-11-10 23:13:16 +0800911 FI_INLINE_DATA, /* used for inline data*/
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900912};
913
914static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
915{
916 set_bit(flag, &fi->flags);
917}
918
919static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
920{
921 return test_bit(flag, &fi->flags);
922}
923
924static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
925{
926 clear_bit(flag, &fi->flags);
927}
928
929static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
930{
931 fi->i_acl_mode = mode;
932 set_inode_flag(fi, FI_ACL_MODE);
933}
934
935static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
936{
937 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
938 clear_inode_flag(fi, FI_ACL_MODE);
939 return 1;
940 }
941 return 0;
942}
943
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900944static inline void get_inline_info(struct f2fs_inode_info *fi,
945 struct f2fs_inode *ri)
946{
947 if (ri->i_inline & F2FS_INLINE_XATTR)
948 set_inode_flag(fi, FI_INLINE_XATTR);
Huajun Li1001b342013-11-10 23:13:16 +0800949 if (ri->i_inline & F2FS_INLINE_DATA)
950 set_inode_flag(fi, FI_INLINE_DATA);
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900951}
952
953static inline void set_raw_inline(struct f2fs_inode_info *fi,
954 struct f2fs_inode *ri)
955{
956 ri->i_inline = 0;
957
958 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
959 ri->i_inline |= F2FS_INLINE_XATTR;
Huajun Li1001b342013-11-10 23:13:16 +0800960 if (is_inode_flag_set(fi, FI_INLINE_DATA))
961 ri->i_inline |= F2FS_INLINE_DATA;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900962}
963
Jaegeuk Kimde936532013-08-12 21:08:03 +0900964static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
965{
966 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
967 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
968 return DEF_ADDRS_PER_INODE;
969}
970
Jaegeuk Kim65985d92013-08-14 21:57:27 +0900971static inline void *inline_xattr_addr(struct page *page)
972{
973 struct f2fs_inode *ri;
974 ri = (struct f2fs_inode *)page_address(page);
975 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
976 F2FS_INLINE_XATTR_ADDRS]);
977}
978
979static inline int inline_xattr_size(struct inode *inode)
980{
981 if (is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR))
982 return F2FS_INLINE_XATTR_ADDRS << 2;
983 else
984 return 0;
985}
986
Huajun Li1001b342013-11-10 23:13:16 +0800987static inline void *inline_data_addr(struct page *page)
988{
989 struct f2fs_inode *ri;
990 ri = (struct f2fs_inode *)page_address(page);
991 return (void *)&(ri->i_addr[1]);
992}
993
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900994static inline int f2fs_readonly(struct super_block *sb)
995{
996 return sb->s_flags & MS_RDONLY;
997}
998
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900999/*
1000 * file.c
1001 */
1002int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1003void truncate_data_blocks(struct dnode_of_data *);
1004void f2fs_truncate(struct inode *);
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001005int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001006int f2fs_setattr(struct dentry *, struct iattr *);
1007int truncate_hole(struct inode *, pgoff_t, pgoff_t);
Jaegeuk Kimb292dcab2013-05-22 08:02:02 +09001008int truncate_data_blocks_range(struct dnode_of_data *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001009long f2fs_ioctl(struct file *, unsigned int, unsigned long);
Namjae Jeone9750822013-02-04 23:41:41 +09001010long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001011
1012/*
1013 * inode.c
1014 */
1015void f2fs_set_inode_flags(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001016struct inode *f2fs_iget(struct super_block *, unsigned long);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001017int try_to_free_nats(struct f2fs_sb_info *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001018void update_inode(struct inode *, struct page *);
Jaegeuk Kim39936832012-11-22 16:21:29 +09001019int update_inode_page(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001020int f2fs_write_inode(struct inode *, struct writeback_control *);
1021void f2fs_evict_inode(struct inode *);
1022
1023/*
1024 * namei.c
1025 */
1026struct dentry *f2fs_get_parent(struct dentry *child);
1027
1028/*
1029 * dir.c
1030 */
1031struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1032 struct page **);
1033struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1034ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1035void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1036 struct page *, struct inode *);
Jaegeuk Kim1cd14ca2013-07-18 18:02:31 +09001037int update_dent_inode(struct inode *, const struct qstr *);
Al Virob7f7a5e2013-01-25 16:15:43 -05001038int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001039void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
1040int f2fs_make_empty(struct inode *, struct inode *);
1041bool f2fs_empty_dir(struct inode *);
1042
Al Virob7f7a5e2013-01-25 16:15:43 -05001043static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1044{
1045 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1046 inode);
1047}
1048
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001049/*
1050 * super.c
1051 */
1052int f2fs_sync_fs(struct super_block *, int);
Namjae Jeona07ef782012-12-30 14:52:05 +09001053extern __printf(3, 4)
1054void f2fs_msg(struct super_block *, const char *, const char *, ...);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001055
1056/*
1057 * hash.c
1058 */
Leon Romanovsky9836b8b2012-12-27 19:55:46 +02001059f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001060
1061/*
1062 * node.c
1063 */
1064struct dnode_of_data;
1065struct node_info;
1066
1067int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1068void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1069int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1070int truncate_inode_blocks(struct inode *, pgoff_t);
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +09001071int truncate_xattr_node(struct inode *, struct page *);
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001072int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
Gu Zheng58e674d2013-11-19 18:03:18 +08001073void remove_inode_page(struct inode *);
Jaegeuk Kim44a83ff2013-05-20 10:10:29 +09001074struct page *new_inode_page(struct inode *, const struct qstr *);
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +09001075struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001076void ra_node_page(struct f2fs_sb_info *, nid_t);
1077struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1078struct page *get_node_page_ra(struct page *, int);
1079void sync_inode_page(struct dnode_of_data *);
1080int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1081bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1082void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1083void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1084void recover_node_page(struct f2fs_sb_info *, struct page *,
1085 struct f2fs_summary *, struct node_info *, block_t);
1086int recover_inode_page(struct f2fs_sb_info *, struct page *);
1087int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1088 struct f2fs_summary_block *);
1089void flush_nat_entries(struct f2fs_sb_info *);
1090int build_node_manager(struct f2fs_sb_info *);
1091void destroy_node_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001092int __init create_node_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001093void destroy_node_manager_caches(void);
1094
1095/*
1096 * segment.c
1097 */
1098void f2fs_balance_fs(struct f2fs_sb_info *);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001099void f2fs_balance_fs_bg(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001100void invalidate_blocks(struct f2fs_sb_info *, block_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001101void clear_prefree_segments(struct f2fs_sb_info *);
1102int npages_for_summary_flush(struct f2fs_sb_info *);
1103void allocate_new_segments(struct f2fs_sb_info *);
1104struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001105void write_meta_page(struct f2fs_sb_info *, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001106void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
1107 block_t, block_t *);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001108void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1109 struct f2fs_io_info *);
1110void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001111void recover_data_page(struct f2fs_sb_info *, struct page *,
1112 struct f2fs_summary *, block_t, block_t);
1113void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1114 struct f2fs_summary *, block_t, block_t);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001115void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001116void write_data_summaries(struct f2fs_sb_info *, block_t);
1117void write_node_summaries(struct f2fs_sb_info *, block_t);
1118int lookup_journal_in_cursum(struct f2fs_summary_block *,
1119 int, unsigned int, int);
1120void flush_sit_entries(struct f2fs_sb_info *);
1121int build_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001122void destroy_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001123int __init create_segment_manager_caches(void);
1124void destroy_segment_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001125
1126/*
1127 * checkpoint.c
1128 */
1129struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1130struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1131long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001132int acquire_orphan_inode(struct f2fs_sb_info *);
1133void release_orphan_inode(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001134void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1135void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
Chao Yu8f99a942013-11-28 15:43:43 +08001136void recover_orphan_inodes(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001137int get_valid_checkpoint(struct f2fs_sb_info *);
1138void set_dirty_dir_page(struct inode *, struct page *);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +09001139void add_dirty_dir_inode(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001140void remove_dirty_dir_inode(struct inode *);
Jaegeuk Kim74d0b912013-05-15 16:40:02 +09001141struct inode *check_dirty_dir_inode(struct f2fs_sb_info *, nid_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001142void sync_dirty_dir_inodes(struct f2fs_sb_info *);
Jaegeuk Kim43727522013-02-04 15:11:17 +09001143void write_checkpoint(struct f2fs_sb_info *, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001144void init_orphan_info(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001145int __init create_checkpoint_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001146void destroy_checkpoint_caches(void);
1147
1148/*
1149 * data.c
1150 */
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001151void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001152int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1153void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001154 struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001155int reserve_new_block(struct dnode_of_data *);
Huajun Lib6009652013-11-10 23:13:18 +08001156int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001157void update_extent_cache(block_t, struct dnode_of_data *);
Jaegeuk Kimc718379b2013-04-24 13:19:56 +09001158struct page *find_data_page(struct inode *, pgoff_t, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001159struct page *get_lock_data_page(struct inode *, pgoff_t);
Jaegeuk Kim64aa7ed2013-05-20 09:55:50 +09001160struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001161int do_write_data_page(struct page *, struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001162
1163/*
1164 * gc.c
1165 */
1166int start_gc_thread(struct f2fs_sb_info *);
1167void stop_gc_thread(struct f2fs_sb_info *);
Jaegeuk Kimde936532013-08-12 21:08:03 +09001168block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
Jaegeuk Kim408e9372013-01-03 17:55:52 +09001169int f2fs_gc(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001170void build_gc_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001171int __init create_gc_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001172void destroy_gc_caches(void);
1173
1174/*
1175 * recovery.c
1176 */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +09001177int recover_fsync_data(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001178bool space_for_roll_forward(struct f2fs_sb_info *);
1179
1180/*
1181 * debug.c
1182 */
1183#ifdef CONFIG_F2FS_STAT_FS
1184struct f2fs_stat_info {
1185 struct list_head stat_list;
1186 struct f2fs_sb_info *sbi;
1187 struct mutex stat_lock;
1188 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1189 int main_area_segs, main_area_sections, main_area_zones;
1190 int hit_ext, total_ext;
1191 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1192 int nats, sits, fnids;
1193 int total_count, utilization;
1194 int bg_gc;
1195 unsigned int valid_count, valid_node_count, valid_inode_count;
1196 unsigned int bimodal, avg_vblocks;
1197 int util_free, util_valid, util_invalid;
1198 int rsvd_segs, overp_segs;
1199 int dirty_count, node_pages, meta_pages;
1200 int prefree_count, call_count;
1201 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1202 int tot_blks, data_blks, node_blks;
1203 int curseg[NR_CURSEG_TYPE];
1204 int cursec[NR_CURSEG_TYPE];
1205 int curzone[NR_CURSEG_TYPE];
1206
1207 unsigned int segment_count[2];
1208 unsigned int block_count[2];
1209 unsigned base_mem, cache_mem;
1210};
1211
Gu Zheng963d4f72013-07-12 14:47:11 +08001212static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1213{
1214 return (struct f2fs_stat_info*)sbi->stat_info;
1215}
1216
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001217#define stat_inc_call_count(si) ((si)->call_count++)
1218#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1219#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1220#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1221#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1222#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
1223#define stat_inc_seg_type(sbi, curseg) \
1224 ((sbi)->segment_count[(curseg)->alloc_type]++)
1225#define stat_inc_block_count(sbi, curseg) \
1226 ((sbi)->block_count[(curseg)->alloc_type]++)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001227
1228#define stat_inc_seg_count(sbi, type) \
1229 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001230 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001231 (si)->tot_segs++; \
1232 if (type == SUM_TYPE_DATA) \
1233 si->data_segs++; \
1234 else \
1235 si->node_segs++; \
1236 } while (0)
1237
1238#define stat_inc_tot_blk_count(si, blks) \
1239 (si->tot_blks += (blks))
1240
1241#define stat_inc_data_blk_count(sbi, blks) \
1242 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001243 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001244 stat_inc_tot_blk_count(si, blks); \
1245 si->data_blks += (blks); \
1246 } while (0)
1247
1248#define stat_inc_node_blk_count(sbi, blks) \
1249 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001250 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001251 stat_inc_tot_blk_count(si, blks); \
1252 si->node_blks += (blks); \
1253 } while (0)
1254
1255int f2fs_build_stats(struct f2fs_sb_info *);
1256void f2fs_destroy_stats(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001257void __init f2fs_create_root_stats(void);
Namjae Jeon4589d252013-01-15 19:58:47 +09001258void f2fs_destroy_root_stats(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001259#else
1260#define stat_inc_call_count(si)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001261#define stat_inc_bggc_count(si)
1262#define stat_inc_dirty_dir(sbi)
1263#define stat_dec_dirty_dir(sbi)
1264#define stat_inc_total_hit(sb)
1265#define stat_inc_read_hit(sb)
1266#define stat_inc_seg_type(sbi, curseg)
1267#define stat_inc_block_count(sbi, curseg)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001268#define stat_inc_seg_count(si, type)
1269#define stat_inc_tot_blk_count(si, blks)
1270#define stat_inc_data_blk_count(si, blks)
1271#define stat_inc_node_blk_count(sbi, blks)
1272
1273static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1274static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001275static inline void __init f2fs_create_root_stats(void) { }
Namjae Jeon4589d252013-01-15 19:58:47 +09001276static inline void f2fs_destroy_root_stats(void) { }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001277#endif
1278
1279extern const struct file_operations f2fs_dir_operations;
1280extern const struct file_operations f2fs_file_operations;
1281extern const struct inode_operations f2fs_file_inode_operations;
1282extern const struct address_space_operations f2fs_dblock_aops;
1283extern const struct address_space_operations f2fs_node_aops;
1284extern const struct address_space_operations f2fs_meta_aops;
1285extern const struct inode_operations f2fs_dir_inode_operations;
1286extern const struct inode_operations f2fs_symlink_inode_operations;
1287extern const struct inode_operations f2fs_special_inode_operations;
Huajun Li1001b342013-11-10 23:13:16 +08001288
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001289#endif