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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 Kim6b4afdd2014-04-02 15:34:36 +090043#define F2FS_MOUNT_FLUSH_MERGE 0x00000200
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090044
45#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
46#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
47#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
48
49#define ver_after(a, b) (typecheck(unsigned long long, a) && \
50 typecheck(unsigned long long, b) && \
51 ((long long)((a) - (b)) > 0))
52
Jaegeuk Kima9841c42013-05-24 12:41:04 +090053typedef u32 block_t; /*
54 * should not change u32, since it is the on-disk block
55 * address format, __le32.
56 */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090057typedef u32 nid_t;
58
59struct f2fs_mount_info {
60 unsigned int opt;
61};
62
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090063#define CRCPOLY_LE 0xedb88320
64
65static inline __u32 f2fs_crc32(void *buf, size_t len)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090066{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090067 unsigned char *p = (unsigned char *)buf;
68 __u32 crc = F2FS_SUPER_MAGIC;
69 int i;
70
71 while (len--) {
72 crc ^= *p++;
73 for (i = 0; i < 8; i++)
74 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
75 }
76 return crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090077}
78
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090079static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090080{
Jaegeuk Kim7e586fa2013-06-19 20:47:19 +090081 return f2fs_crc32(buf, buf_size) == blk_crc;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +090082}
83
84/*
85 * For checkpoint manager
86 */
87enum {
88 NAT_BITMAP,
89 SIT_BITMAP
90};
91
Chao Yu662befd2014-02-07 16:11:53 +080092/*
Chao Yu81c1a0f12014-02-27 19:12:24 +080093 * For CP/NAT/SIT/SSA readahead
Chao Yu662befd2014-02-07 16:11:53 +080094 */
95enum {
96 META_CP,
97 META_NAT,
Chao Yu81c1a0f12014-02-27 19:12:24 +080098 META_SIT,
99 META_SSA
Chao Yu662befd2014-02-07 16:11:53 +0800100};
101
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900102/* for the list of orphan inodes */
103struct orphan_inode_entry {
104 struct list_head list; /* list head */
105 nid_t ino; /* inode number */
106};
107
108/* for the list of directory inodes */
109struct dir_inode_entry {
110 struct list_head list; /* list head */
111 struct inode *inode; /* vfs inode pointer */
112};
113
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900114/* for the list of blockaddresses to be discarded */
115struct discard_entry {
116 struct list_head list; /* list head */
117 block_t blkaddr; /* block address to be discarded */
118 int len; /* # of consecutive blocks of the discard */
119};
120
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900121/* for the list of fsync inodes, used only during recovery */
122struct fsync_inode_entry {
123 struct list_head list; /* list head */
124 struct inode *inode; /* vfs inode pointer */
125 block_t blkaddr; /* block address locating the last inode */
126};
127
128#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
129#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
130
131#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
132#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
133#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
134#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
135
136static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
137{
138 int before = nats_in_cursum(rs);
139 rs->n_nats = cpu_to_le16(before + i);
140 return before;
141}
142
143static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
144{
145 int before = sits_in_cursum(rs);
146 rs->n_sits = cpu_to_le16(before + i);
147 return before;
148}
149
150/*
Namjae Jeone9750822013-02-04 23:41:41 +0900151 * ioctl commands
152 */
153#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
154#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
155
156#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
157/*
158 * ioctl commands in 32 bit emulation
159 */
160#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
161#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
162#endif
163
164/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900165 * For INODE and NODE manager
166 */
Jaegeuk Kimdbe6a5f2013-08-09 08:14:06 +0900167/*
168 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
169 * as its node offset to distinguish from index node blocks.
170 * But some bits are used to mark the node block.
171 */
172#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
173 >> OFFSET_BIT_SHIFT)
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900174enum {
175 ALLOC_NODE, /* allocate a new node page if needed */
176 LOOKUP_NODE, /* look up a node without readahead */
177 LOOKUP_NODE_RA, /*
178 * look up a node with readahead called
Chao Yu4f4124d2013-12-21 18:02:14 +0800179 * by get_data_block.
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900180 */
Jaegeuk Kim266e97a2013-02-26 13:10:46 +0900181};
182
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900183#define F2FS_LINK_MAX 32000 /* maximum link count per file */
184
Chao Yu817202d92014-04-28 17:59:43 +0800185#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
186
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900187/* for in-memory extent cache entry */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900188#define F2FS_MIN_EXTENT_LEN 16 /* minimum extent length */
189
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900190struct extent_info {
191 rwlock_t ext_lock; /* rwlock for consistency */
192 unsigned int fofs; /* start offset in a file */
193 u32 blk_addr; /* start block address of the extent */
Masanari Iida111d2492013-03-19 08:03:35 +0900194 unsigned int len; /* length of the extent */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900195};
196
197/*
198 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
199 */
200#define FADVISE_COLD_BIT 0x01
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900201#define FADVISE_LOST_PINO_BIT 0x02
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900202
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900203#define DEF_DIR_LEVEL 0
204
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900205struct f2fs_inode_info {
206 struct inode vfs_inode; /* serve a vfs inode */
207 unsigned long i_flags; /* keep an inode flags for ioctl */
208 unsigned char i_advise; /* use to give file attribute hints */
Jaegeuk Kim38431542014-02-27 18:20:00 +0900209 unsigned char i_dir_level; /* use for dentry level for large dir */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900210 unsigned int i_current_depth; /* use only in directory structure */
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900211 unsigned int i_pino; /* parent inode number */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900212 umode_t i_acl_mode; /* keep file acl mode temporarily */
213
214 /* Use below internally in f2fs*/
215 unsigned long flags; /* use to pass per-file flags */
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900216 struct rw_semaphore i_sem; /* protect fi info */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900217 atomic_t dirty_dents; /* # of dirty dentry pages */
218 f2fs_hash_t chash; /* hash value of given file name */
219 unsigned int clevel; /* maximum level of given file name */
220 nid_t i_xattr_nid; /* node id that contains xattrs */
Jaegeuk Kime518ff82013-08-09 14:46:15 +0900221 unsigned long long xattr_ver; /* cp version of xattr modification */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900222 struct extent_info ext; /* in-memory extent cache entry */
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900223 struct dir_inode_entry *dirty_dir; /* the pointer of dirty dir */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900224};
225
226static inline void get_extent_info(struct extent_info *ext,
227 struct f2fs_extent i_ext)
228{
229 write_lock(&ext->ext_lock);
230 ext->fofs = le32_to_cpu(i_ext.fofs);
231 ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
232 ext->len = le32_to_cpu(i_ext.len);
233 write_unlock(&ext->ext_lock);
234}
235
236static inline void set_raw_extent(struct extent_info *ext,
237 struct f2fs_extent *i_ext)
238{
239 read_lock(&ext->ext_lock);
240 i_ext->fofs = cpu_to_le32(ext->fofs);
241 i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
242 i_ext->len = cpu_to_le32(ext->len);
243 read_unlock(&ext->ext_lock);
244}
245
246struct f2fs_nm_info {
247 block_t nat_blkaddr; /* base disk address of NAT */
248 nid_t max_nid; /* maximum possible node ids */
Jaegeuk Kim7ee0eea2014-04-18 11:14:37 +0900249 nid_t available_nids; /* maximum available node ids */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900250 nid_t next_scan_nid; /* the next nid to be scanned */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900251 unsigned int ram_thresh; /* control the memory footprint */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900252
253 /* NAT cache management */
254 struct radix_tree_root nat_root;/* root of the nat entry cache */
255 rwlock_t nat_tree_lock; /* protect nat_tree_lock */
256 unsigned int nat_cnt; /* the # of cached nat entries */
257 struct list_head nat_entries; /* cached nat entry list (clean) */
258 struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
Chao Yuaec71382014-06-24 09:18:20 +0800259 struct list_head nat_entry_set; /* nat entry set list */
260 unsigned int dirty_nat_cnt; /* total num of nat entries in set */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900261
262 /* free node ids management */
Jaegeuk Kim8a7ed662014-02-21 14:29:35 +0900263 struct radix_tree_root free_nid_root;/* root of the free_nid cache */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900264 struct list_head free_nid_list; /* a list for free nids */
265 spinlock_t free_nid_list_lock; /* protect free nid list */
266 unsigned int fcnt; /* the number of free node id */
267 struct mutex build_lock; /* lock for build free nids */
268
269 /* for checkpoint */
270 char *nat_bitmap; /* NAT bitmap pointer */
271 int bitmap_size; /* bitmap size */
272};
273
274/*
275 * this structure is used as one of function parameters.
276 * all the information are dedicated to a given direct node block determined
277 * by the data offset in a file.
278 */
279struct dnode_of_data {
280 struct inode *inode; /* vfs inode pointer */
281 struct page *inode_page; /* its inode page, NULL is possible */
282 struct page *node_page; /* cached direct node page */
283 nid_t nid; /* node id of the direct node block */
284 unsigned int ofs_in_node; /* data offset in the node page */
285 bool inode_page_locked; /* inode page is locked or not */
286 block_t data_blkaddr; /* block address of the node block */
287};
288
289static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
290 struct page *ipage, struct page *npage, nid_t nid)
291{
Jaegeuk Kimd66d1f72013-01-03 08:57:21 +0900292 memset(dn, 0, sizeof(*dn));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900293 dn->inode = inode;
294 dn->inode_page = ipage;
295 dn->node_page = npage;
296 dn->nid = nid;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900297}
298
299/*
300 * For SIT manager
301 *
302 * By default, there are 6 active log areas across the whole main area.
303 * When considering hot and cold data separation to reduce cleaning overhead,
304 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
305 * respectively.
306 * In the current design, you should not change the numbers intentionally.
307 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
308 * logs individually according to the underlying devices. (default: 6)
309 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
310 * data and 8 for node logs.
311 */
312#define NR_CURSEG_DATA_TYPE (3)
313#define NR_CURSEG_NODE_TYPE (3)
314#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
315
316enum {
317 CURSEG_HOT_DATA = 0, /* directory entry blocks */
318 CURSEG_WARM_DATA, /* data blocks */
319 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
320 CURSEG_HOT_NODE, /* direct node blocks of directory files */
321 CURSEG_WARM_NODE, /* direct node blocks of normal files */
322 CURSEG_COLD_NODE, /* indirect node blocks */
323 NO_CHECK_TYPE
324};
325
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900326struct flush_cmd {
327 struct flush_cmd *next;
328 struct completion wait;
329 int ret;
330};
331
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800332struct flush_cmd_control {
333 struct task_struct *f2fs_issue_flush; /* flush thread */
334 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
335 struct flush_cmd *issue_list; /* list for command issue */
336 struct flush_cmd *dispatch_list; /* list for command dispatch */
337 spinlock_t issue_lock; /* for issue list lock */
338 struct flush_cmd *issue_tail; /* list tail of issue list */
339};
340
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900341struct f2fs_sm_info {
342 struct sit_info *sit_info; /* whole segment information */
343 struct free_segmap_info *free_info; /* free segment information */
344 struct dirty_seglist_info *dirty_info; /* dirty segment information */
345 struct curseg_info *curseg_array; /* active segment information */
346
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900347 block_t seg0_blkaddr; /* block address of 0'th segment */
348 block_t main_blkaddr; /* start block address of main area */
349 block_t ssa_blkaddr; /* start block address of SSA area */
350
351 unsigned int segment_count; /* total # of segments */
352 unsigned int main_segments; /* # of segments in main area */
353 unsigned int reserved_segments; /* # of reserved segments */
354 unsigned int ovp_segments; /* # of overprovision segments */
Jaegeuk Kim81eb8d62013-10-24 13:31:34 +0900355
356 /* a threshold to reclaim prefree segments */
357 unsigned int rec_prefree_segments;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +0900358
359 /* for small discard management */
360 struct list_head discard_list; /* 4KB discard list */
361 int nr_discards; /* # of discards in the list */
362 int max_discards; /* max. discards to be issued */
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900363
364 unsigned int ipu_policy; /* in-place-update policy */
365 unsigned int min_ipu_util; /* in-place-update threshold */
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900366
367 /* for flush command control */
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800368 struct flush_cmd_control *cmd_control_info;
369
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900370};
371
372/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900373 * For superblock
374 */
375/*
376 * COUNT_TYPE for monitoring
377 *
378 * f2fs monitors the number of several block types such as on-writeback,
379 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
380 */
381enum count_type {
382 F2FS_WRITEBACK,
383 F2FS_DIRTY_DENTS,
384 F2FS_DIRTY_NODES,
385 F2FS_DIRTY_META,
386 NR_COUNT_TYPE,
387};
388
389/*
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900390 * The below are the page types of bios used in submti_bio().
391 * The available types are:
392 * DATA User data pages. It operates as async mode.
393 * NODE Node pages. It operates as async mode.
394 * META FS metadata pages such as SIT, NAT, CP.
395 * NR_PAGE_TYPE The number of page types.
396 * META_FLUSH Make sure the previous pages are written
397 * with waiting the bio's completion
398 * ... Only can be used with META.
399 */
Jaegeuk Kim7d5e5102013-11-18 17:13:35 +0900400#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900401enum page_type {
402 DATA,
403 NODE,
404 META,
405 NR_PAGE_TYPE,
406 META_FLUSH,
407};
408
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900409struct f2fs_io_info {
Gu Zheng7e8f2302013-12-20 18:17:49 +0800410 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
411 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900412};
413
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +0900414#define is_read_io(rw) (((rw) & 1) == READ)
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900415struct f2fs_bio_info {
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900416 struct f2fs_sb_info *sbi; /* f2fs superblock */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900417 struct bio *bio; /* bios to merge */
418 sector_t last_block_in_bio; /* last block number */
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900419 struct f2fs_io_info fio; /* store buffered io info. */
Chao Yudf0f8dc2014-03-22 14:57:23 +0800420 struct rw_semaphore io_rwsem; /* blocking op for bio */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900421};
422
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900423struct f2fs_sb_info {
424 struct super_block *sb; /* pointer to VFS super block */
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900425 struct proc_dir_entry *s_proc; /* proc entry */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900426 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
427 struct f2fs_super_block *raw_super; /* raw super block pointer */
428 int s_dirty; /* dirty flag for checkpoint */
429
430 /* for node-related operations */
431 struct f2fs_nm_info *nm_info; /* node manager */
432 struct inode *node_inode; /* cache node blocks */
433
434 /* for segment-related operations */
435 struct f2fs_sm_info *sm_info; /* segment manager */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900436
437 /* for bio operations */
Chao Yu924b7202013-11-20 14:46:39 +0800438 struct f2fs_bio_info read_io; /* for read bios */
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900439 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
Jaegeuk Kim1b1f5592014-02-03 10:50:22 +0900440 struct completion *wait_io; /* for completion bios */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900441
442 /* for checkpoint */
443 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
444 struct inode *meta_inode; /* cache meta blocks */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900445 struct mutex cp_mutex; /* checkpoint procedure lock */
Gu Zhenge4795562013-09-27 18:08:30 +0800446 struct rw_semaphore cp_rwsem; /* blocking FS operations */
Jaegeuk Kim39936832012-11-22 16:21:29 +0900447 struct mutex node_write; /* locking node writes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900448 struct mutex writepages; /* mutex for writepages() */
Haicheng Liaabe5132013-10-23 12:39:32 +0800449 bool por_doing; /* recovery is doing or not */
Changman Leefb51b5e2013-11-07 12:48:25 +0900450 wait_queue_head_t cp_wait;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900451
452 /* for orphan inode management */
453 struct list_head orphan_inode_list; /* orphan inode list */
Gu Zheng17b692f2014-01-10 18:09:14 +0800454 spinlock_t orphan_inode_lock; /* for orphan inode list */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900455 unsigned int n_orphans; /* # of orphan inodes */
Gu Zheng0d47c1a2013-12-26 18:24:19 +0800456 unsigned int max_orphans; /* max orphan inodes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900457
458 /* for directory inode management */
459 struct list_head dir_inode_list; /* dir inode list */
460 spinlock_t dir_inode_lock; /* for dir inode list lock */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900461
462 /* basic file system units */
463 unsigned int log_sectors_per_block; /* log2 sectors per block */
464 unsigned int log_blocksize; /* log2 block size */
465 unsigned int blocksize; /* block size */
466 unsigned int root_ino_num; /* root inode number*/
467 unsigned int node_ino_num; /* node inode number*/
468 unsigned int meta_ino_num; /* meta inode number*/
469 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
470 unsigned int blocks_per_seg; /* blocks per segment */
471 unsigned int segs_per_sec; /* segments per section */
472 unsigned int secs_per_zone; /* sections per zone */
473 unsigned int total_sections; /* total section count */
474 unsigned int total_node_count; /* total node block count */
475 unsigned int total_valid_node_count; /* valid node block count */
476 unsigned int total_valid_inode_count; /* valid inode count */
477 int active_logs; /* # of active logs */
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900478 int dir_level; /* directory level */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900479
480 block_t user_block_count; /* # of user blocks */
481 block_t total_valid_block_count; /* # of valid blocks */
482 block_t alloc_valid_block_count; /* # of allocated blocks */
483 block_t last_valid_block_count; /* for recovery */
484 u32 s_next_generation; /* for NFS support */
485 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
486
487 struct f2fs_mount_info mount_opt; /* mount options */
488
489 /* for cleaning operations */
490 struct mutex gc_mutex; /* mutex for GC */
491 struct f2fs_gc_kthread *gc_thread; /* GC thread */
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900492 unsigned int cur_victim_sec; /* current victim section num */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900493
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900494 /* maximum # of trials to find a victim segment for SSR and GC */
495 unsigned int max_victim_search;
496
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900497 /*
498 * for stat information.
499 * one is for the LFS mode, and the other is for the SSR mode.
500 */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900501#ifdef CONFIG_F2FS_STAT_FS
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900502 struct f2fs_stat_info *stat_info; /* FS status information */
503 unsigned int segment_count[2]; /* # of allocated segments */
504 unsigned int block_count[2]; /* # of allocated blocks */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900505 int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +0900506 int inline_inode; /* # of inline_data inodes */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900507 int bg_gc; /* background gc calls */
Namjae Jeon35b09d82013-05-23 22:57:53 +0900508 unsigned int n_dirty_dirs; /* # of dir inodes */
509#endif
510 unsigned int last_victim[2]; /* last victim segment # */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900511 spinlock_t stat_lock; /* lock for stat operations */
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900512
513 /* For sysfs suppport */
514 struct kobject s_kobj;
515 struct completion s_kobj_unregister;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900516};
517
518/*
519 * Inline functions
520 */
521static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
522{
523 return container_of(inode, struct f2fs_inode_info, vfs_inode);
524}
525
526static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
527{
528 return sb->s_fs_info;
529}
530
531static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
532{
533 return (struct f2fs_super_block *)(sbi->raw_super);
534}
535
536static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
537{
538 return (struct f2fs_checkpoint *)(sbi->ckpt);
539}
540
Gu Zheng45590712013-07-15 17:57:38 +0800541static inline struct f2fs_node *F2FS_NODE(struct page *page)
542{
543 return (struct f2fs_node *)page_address(page);
544}
545
Jaegeuk Kim58bfaf42013-12-26 16:30:41 +0900546static inline struct f2fs_inode *F2FS_INODE(struct page *page)
547{
548 return &((struct f2fs_node *)page_address(page))->i;
549}
550
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900551static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
552{
553 return (struct f2fs_nm_info *)(sbi->nm_info);
554}
555
556static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
557{
558 return (struct f2fs_sm_info *)(sbi->sm_info);
559}
560
561static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
562{
563 return (struct sit_info *)(SM_I(sbi)->sit_info);
564}
565
566static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
567{
568 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
569}
570
571static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
572{
573 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
574}
575
Gu Zheng9df27d92014-01-20 18:37:04 +0800576static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
577{
578 return sbi->meta_inode->i_mapping;
579}
580
Jaegeuk Kim4ef51a82014-01-21 18:51:16 +0900581static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
582{
583 return sbi->node_inode->i_mapping;
584}
585
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900586static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
587{
588 sbi->s_dirty = 1;
589}
590
591static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
592{
593 sbi->s_dirty = 0;
594}
595
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900596static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
597{
598 return le64_to_cpu(cp->checkpoint_ver);
599}
600
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900601static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
602{
603 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
604 return ckpt_flags & f;
605}
606
607static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
608{
609 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
610 ckpt_flags |= f;
611 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
612}
613
614static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
615{
616 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
617 ckpt_flags &= (~f);
618 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
619}
620
Gu Zhenge4795562013-09-27 18:08:30 +0800621static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900622{
Gu Zhenge4795562013-09-27 18:08:30 +0800623 down_read(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900624}
625
Gu Zhenge4795562013-09-27 18:08:30 +0800626static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900627{
Gu Zhenge4795562013-09-27 18:08:30 +0800628 up_read(&sbi->cp_rwsem);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900629}
630
Gu Zhenge4795562013-09-27 18:08:30 +0800631static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900632{
Jaegeuk Kim0daaad92013-11-24 13:50:35 +0900633 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900634}
635
Gu Zhenge4795562013-09-27 18:08:30 +0800636static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
Jaegeuk Kim39936832012-11-22 16:21:29 +0900637{
Gu Zhenge4795562013-09-27 18:08:30 +0800638 up_write(&sbi->cp_rwsem);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900639}
640
641/*
642 * Check whether the given nid is within node id range.
643 */
Namjae Jeon064e0822013-03-17 17:27:20 +0900644static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900645{
Chao Yud6b7d4b2014-06-12 13:23:41 +0800646 if (unlikely(nid < F2FS_ROOT_INO(sbi)))
647 return -EINVAL;
Chao Yucfb271d2013-12-05 17:15:22 +0800648 if (unlikely(nid >= NM_I(sbi)->max_nid))
Namjae Jeon064e0822013-03-17 17:27:20 +0900649 return -EINVAL;
650 return 0;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900651}
652
653#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
654
655/*
656 * Check whether the inode has blocks or not
657 */
658static inline int F2FS_HAS_BLOCKS(struct inode *inode)
659{
660 if (F2FS_I(inode)->i_xattr_nid)
Chris Fries6c311ec2014-01-17 14:44:39 -0600661 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900662 else
Chris Fries6c311ec2014-01-17 14:44:39 -0600663 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900664}
665
Chao Yu4bc8e9b2014-03-17 16:35:06 +0800666static inline bool f2fs_has_xattr_block(unsigned int ofs)
667{
668 return ofs == XATTR_NODE_OFFSET;
669}
670
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900671static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
672 struct inode *inode, blkcnt_t count)
673{
674 block_t valid_block_count;
675
676 spin_lock(&sbi->stat_lock);
677 valid_block_count =
678 sbi->total_valid_block_count + (block_t)count;
Chao Yucfb271d2013-12-05 17:15:22 +0800679 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900680 spin_unlock(&sbi->stat_lock);
681 return false;
682 }
683 inode->i_blocks += count;
684 sbi->total_valid_block_count = valid_block_count;
685 sbi->alloc_valid_block_count += (block_t)count;
686 spin_unlock(&sbi->stat_lock);
687 return true;
688}
689
Gu Zhengda19b0d2013-11-19 18:03:27 +0800690static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900691 struct inode *inode,
692 blkcnt_t count)
693{
694 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900695 f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
696 f2fs_bug_on(inode->i_blocks < count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900697 inode->i_blocks -= count;
698 sbi->total_valid_block_count -= (block_t)count;
699 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900700}
701
702static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
703{
704 atomic_inc(&sbi->nr_pages[count_type]);
705 F2FS_SET_SB_DIRT(sbi);
706}
707
708static inline void inode_inc_dirty_dents(struct inode *inode)
709{
Jaegeuk Kim1fe54f92014-02-07 10:00:06 +0900710 inc_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900711 atomic_inc(&F2FS_I(inode)->dirty_dents);
712}
713
714static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
715{
716 atomic_dec(&sbi->nr_pages[count_type]);
717}
718
719static inline void inode_dec_dirty_dents(struct inode *inode)
720{
Jaegeuk Kim1fe54f92014-02-07 10:00:06 +0900721 if (!S_ISDIR(inode->i_mode))
722 return;
723
724 dec_page_count(F2FS_SB(inode->i_sb), F2FS_DIRTY_DENTS);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900725 atomic_dec(&F2FS_I(inode)->dirty_dents);
726}
727
728static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
729{
730 return atomic_read(&sbi->nr_pages[count_type]);
731}
732
Jaegeuk Kimf8b2c1f2014-03-18 12:33:06 +0900733static inline int get_dirty_dents(struct inode *inode)
734{
735 return atomic_read(&F2FS_I(inode)->dirty_dents);
736}
737
Namjae Jeon5ac206c2013-02-02 23:52:59 +0900738static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
739{
740 unsigned int pages_per_sec = sbi->segs_per_sec *
741 (1 << sbi->log_blocks_per_seg);
742 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
743 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
744}
745
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900746static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
747{
Jaegeuk Kim8b8343f2014-02-24 13:00:13 +0900748 return sbi->total_valid_block_count;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900749}
750
751static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
752{
753 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
754
755 /* return NAT or SIT bitmap */
756 if (flag == NAT_BITMAP)
757 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
758 else if (flag == SIT_BITMAP)
759 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
760
761 return 0;
762}
763
764static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
765{
766 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Changman Lee1dbe4152014-05-12 12:27:43 +0900767 int offset;
768
769 if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) {
770 if (flag == NAT_BITMAP)
771 return &ckpt->sit_nat_version_bitmap;
772 else
773 return ((unsigned char *)ckpt + F2FS_BLKSIZE);
774 } else {
775 offset = (flag == NAT_BITMAP) ?
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900776 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
Changman Lee1dbe4152014-05-12 12:27:43 +0900777 return &ckpt->sit_nat_version_bitmap + offset;
778 }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900779}
780
781static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
782{
783 block_t start_addr;
784 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimd71b5562013-08-09 15:03:21 +0900785 unsigned long long ckpt_version = cur_cp_version(ckpt);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900786
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900787 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900788
789 /*
790 * odd numbered checkpoint should at cp segment 0
791 * and even segent must be at cp segment 1
792 */
793 if (!(ckpt_version & 1))
794 start_addr += sbi->blocks_per_seg;
795
796 return start_addr;
797}
798
799static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
800{
801 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
802}
803
804static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800805 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900806{
807 block_t valid_block_count;
808 unsigned int valid_node_count;
809
810 spin_lock(&sbi->stat_lock);
811
Gu Zhengef86d702013-11-19 18:03:38 +0800812 valid_block_count = sbi->total_valid_block_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800813 if (unlikely(valid_block_count > sbi->user_block_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900814 spin_unlock(&sbi->stat_lock);
815 return false;
816 }
817
Gu Zhengef86d702013-11-19 18:03:38 +0800818 valid_node_count = sbi->total_valid_node_count + 1;
Chao Yucfb271d2013-12-05 17:15:22 +0800819 if (unlikely(valid_node_count > sbi->total_node_count)) {
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900820 spin_unlock(&sbi->stat_lock);
821 return false;
822 }
823
824 if (inode)
Gu Zhengef86d702013-11-19 18:03:38 +0800825 inode->i_blocks++;
826
827 sbi->alloc_valid_block_count++;
828 sbi->total_valid_node_count++;
829 sbi->total_valid_block_count++;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900830 spin_unlock(&sbi->stat_lock);
831
832 return true;
833}
834
835static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
Gu Zhengef86d702013-11-19 18:03:38 +0800836 struct inode *inode)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900837{
838 spin_lock(&sbi->stat_lock);
839
Gu Zhengef86d702013-11-19 18:03:38 +0800840 f2fs_bug_on(!sbi->total_valid_block_count);
841 f2fs_bug_on(!sbi->total_valid_node_count);
842 f2fs_bug_on(!inode->i_blocks);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900843
Gu Zhengef86d702013-11-19 18:03:38 +0800844 inode->i_blocks--;
845 sbi->total_valid_node_count--;
846 sbi->total_valid_block_count--;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900847
848 spin_unlock(&sbi->stat_lock);
849}
850
851static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
852{
Jaegeuk Kim8b8343f2014-02-24 13:00:13 +0900853 return sbi->total_valid_node_count;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900854}
855
856static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
857{
858 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900859 f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900860 sbi->total_valid_inode_count++;
861 spin_unlock(&sbi->stat_lock);
862}
863
Jaegeuk Kim0e802202013-11-26 16:36:20 +0900864static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900865{
866 spin_lock(&sbi->stat_lock);
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900867 f2fs_bug_on(!sbi->total_valid_inode_count);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900868 sbi->total_valid_inode_count--;
869 spin_unlock(&sbi->stat_lock);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900870}
871
872static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
873{
Jaegeuk Kim8b8343f2014-02-24 13:00:13 +0900874 return sbi->total_valid_inode_count;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900875}
876
877static inline void f2fs_put_page(struct page *page, int unlock)
878{
Jaegeuk Kim031fa8c2013-11-28 12:55:13 +0900879 if (!page)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900880 return;
881
882 if (unlock) {
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900883 f2fs_bug_on(!PageLocked(page));
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900884 unlock_page(page);
885 }
886 page_cache_release(page);
887}
888
889static inline void f2fs_put_dnode(struct dnode_of_data *dn)
890{
891 if (dn->node_page)
892 f2fs_put_page(dn->node_page, 1);
893 if (dn->inode_page && dn->node_page != dn->inode_page)
894 f2fs_put_page(dn->inode_page, 0);
895 dn->node_page = NULL;
896 dn->inode_page = NULL;
897}
898
899static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
Gu Zhenge8512d22014-03-07 18:43:28 +0800900 size_t size)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900901{
Gu Zhenge8512d22014-03-07 18:43:28 +0800902 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900903}
904
Gu Zheng7bd59382013-10-22 14:52:26 +0800905static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
906 gfp_t flags)
907{
908 void *entry;
909retry:
910 entry = kmem_cache_alloc(cachep, flags);
911 if (!entry) {
912 cond_resched();
913 goto retry;
914 }
915
916 return entry;
917}
918
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900919#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
920
921static inline bool IS_INODE(struct page *page)
922{
Gu Zheng45590712013-07-15 17:57:38 +0800923 struct f2fs_node *p = F2FS_NODE(page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900924 return RAW_IS_INODE(p);
925}
926
927static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
928{
929 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
930}
931
932static inline block_t datablock_addr(struct page *node_page,
933 unsigned int offset)
934{
935 struct f2fs_node *raw_node;
936 __le32 *addr_array;
Gu Zheng45590712013-07-15 17:57:38 +0800937 raw_node = F2FS_NODE(node_page);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900938 addr_array = blkaddr_in_node(raw_node);
939 return le32_to_cpu(addr_array[offset]);
940}
941
942static inline int f2fs_test_bit(unsigned int nr, char *addr)
943{
944 int mask;
945
946 addr += (nr >> 3);
947 mask = 1 << (7 - (nr & 0x07));
948 return mask & *addr;
949}
950
951static inline int f2fs_set_bit(unsigned int nr, char *addr)
952{
953 int mask;
954 int ret;
955
956 addr += (nr >> 3);
957 mask = 1 << (7 - (nr & 0x07));
958 ret = mask & *addr;
959 *addr |= mask;
960 return ret;
961}
962
963static inline int f2fs_clear_bit(unsigned int nr, char *addr)
964{
965 int mask;
966 int ret;
967
968 addr += (nr >> 3);
969 mask = 1 << (7 - (nr & 0x07));
970 ret = mask & *addr;
971 *addr &= ~mask;
972 return ret;
973}
974
975/* used for f2fs_inode_info->flags */
976enum {
977 FI_NEW_INODE, /* indicate newly allocated inode */
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900978 FI_DIRTY_INODE, /* indicate inode is dirty or not */
Jaegeuk Kimed57c272014-04-15 11:19:28 +0900979 FI_DIRTY_DIR, /* indicate directory has dirty pages */
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900980 FI_INC_LINK, /* need to increment i_nlink */
981 FI_ACL_MODE, /* indicate acl mode */
982 FI_NO_ALLOC, /* should not allocate any blocks */
Jaegeuk Kim699489b2013-06-07 22:08:23 +0900983 FI_UPDATE_DIR, /* should update inode block for consistency */
Jaegeuk Kim74d0b912013-05-15 16:40:02 +0900984 FI_DELAY_IPUT, /* used for the recovery */
Jaegeuk Kimc11abd12013-11-19 10:41:54 +0900985 FI_NO_EXTENT, /* not to use the extent cache */
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900986 FI_INLINE_XATTR, /* used for inline xattr */
Huajun Li1001b342013-11-10 23:13:16 +0800987 FI_INLINE_DATA, /* used for inline data*/
Jaegeuk Kim39a53e02012-11-28 13:37:31 +0900988};
989
990static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
991{
992 set_bit(flag, &fi->flags);
993}
994
995static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
996{
997 return test_bit(flag, &fi->flags);
998}
999
1000static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1001{
1002 clear_bit(flag, &fi->flags);
1003}
1004
1005static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
1006{
1007 fi->i_acl_mode = mode;
1008 set_inode_flag(fi, FI_ACL_MODE);
1009}
1010
1011static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1012{
1013 if (is_inode_flag_set(fi, FI_ACL_MODE)) {
1014 clear_inode_flag(fi, FI_ACL_MODE);
1015 return 1;
1016 }
1017 return 0;
1018}
1019
Jaegeuk Kim444c5802013-08-08 15:16:22 +09001020static inline void get_inline_info(struct f2fs_inode_info *fi,
1021 struct f2fs_inode *ri)
1022{
1023 if (ri->i_inline & F2FS_INLINE_XATTR)
1024 set_inode_flag(fi, FI_INLINE_XATTR);
Huajun Li1001b342013-11-10 23:13:16 +08001025 if (ri->i_inline & F2FS_INLINE_DATA)
1026 set_inode_flag(fi, FI_INLINE_DATA);
Jaegeuk Kim444c5802013-08-08 15:16:22 +09001027}
1028
1029static inline void set_raw_inline(struct f2fs_inode_info *fi,
1030 struct f2fs_inode *ri)
1031{
1032 ri->i_inline = 0;
1033
1034 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1035 ri->i_inline |= F2FS_INLINE_XATTR;
Huajun Li1001b342013-11-10 23:13:16 +08001036 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1037 ri->i_inline |= F2FS_INLINE_DATA;
Jaegeuk Kim444c5802013-08-08 15:16:22 +09001038}
1039
Chao Yu987c7c32014-03-12 15:59:03 +08001040static inline int f2fs_has_inline_xattr(struct inode *inode)
1041{
1042 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1043}
1044
Jaegeuk Kimde936532013-08-12 21:08:03 +09001045static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
1046{
Chao Yu987c7c32014-03-12 15:59:03 +08001047 if (f2fs_has_inline_xattr(&fi->vfs_inode))
Jaegeuk Kimde936532013-08-12 21:08:03 +09001048 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1049 return DEF_ADDRS_PER_INODE;
1050}
1051
Jaegeuk Kim65985d92013-08-14 21:57:27 +09001052static inline void *inline_xattr_addr(struct page *page)
1053{
Chao Yu695fd1e2014-02-27 19:52:21 +08001054 struct f2fs_inode *ri = F2FS_INODE(page);
Jaegeuk Kim65985d92013-08-14 21:57:27 +09001055 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1056 F2FS_INLINE_XATTR_ADDRS]);
1057}
1058
1059static inline int inline_xattr_size(struct inode *inode)
1060{
Chao Yu987c7c32014-03-12 15:59:03 +08001061 if (f2fs_has_inline_xattr(inode))
Jaegeuk Kim65985d92013-08-14 21:57:27 +09001062 return F2FS_INLINE_XATTR_ADDRS << 2;
1063 else
1064 return 0;
1065}
1066
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001067static inline int f2fs_has_inline_data(struct inode *inode)
1068{
1069 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1070}
1071
Huajun Li1001b342013-11-10 23:13:16 +08001072static inline void *inline_data_addr(struct page *page)
1073{
Chao Yu695fd1e2014-02-27 19:52:21 +08001074 struct f2fs_inode *ri = F2FS_INODE(page);
Huajun Li1001b342013-11-10 23:13:16 +08001075 return (void *)&(ri->i_addr[1]);
1076}
1077
Jaegeuk Kim77888c12013-05-20 20:28:47 +09001078static inline int f2fs_readonly(struct super_block *sb)
1079{
1080 return sb->s_flags & MS_RDONLY;
1081}
1082
Jaegeuk Kim744602c2014-01-24 09:42:16 +09001083static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1084{
1085 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1086 sbi->sb->s_flags |= MS_RDONLY;
1087}
1088
Christoph Hellwiga6dda0e2013-12-20 05:16:45 -08001089#define get_inode_mode(i) \
1090 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1091 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1092
Chao Yu267378d2014-04-23 14:10:24 +08001093/* get offset of first page in next direct node */
1094#define PGOFS_OF_NEXT_DNODE(pgofs, fi) \
1095 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \
1096 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \
1097 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi))
1098
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001099/*
1100 * file.c
1101 */
1102int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1103void truncate_data_blocks(struct dnode_of_data *);
Jaegeuk Kim1e1bb4b2013-12-26 12:49:48 +09001104int truncate_blocks(struct inode *, u64);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001105void f2fs_truncate(struct inode *);
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +09001106int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001107int f2fs_setattr(struct dentry *, struct iattr *);
1108int truncate_hole(struct inode *, pgoff_t, pgoff_t);
Jaegeuk Kimb292dcab2013-05-22 08:02:02 +09001109int truncate_data_blocks_range(struct dnode_of_data *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001110long f2fs_ioctl(struct file *, unsigned int, unsigned long);
Namjae Jeone9750822013-02-04 23:41:41 +09001111long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001112
1113/*
1114 * inode.c
1115 */
1116void f2fs_set_inode_flags(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001117struct inode *f2fs_iget(struct super_block *, unsigned long);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001118int try_to_free_nats(struct f2fs_sb_info *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001119void update_inode(struct inode *, struct page *);
Jaegeuk Kim744602c2014-01-24 09:42:16 +09001120void update_inode_page(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001121int f2fs_write_inode(struct inode *, struct writeback_control *);
1122void f2fs_evict_inode(struct inode *);
1123
1124/*
1125 * namei.c
1126 */
1127struct dentry *f2fs_get_parent(struct dentry *child);
1128
1129/*
1130 * dir.c
1131 */
1132struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1133 struct page **);
1134struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1135ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1136void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1137 struct page *, struct inode *);
Jaegeuk Kim1cd14ca2013-07-18 18:02:31 +09001138int update_dent_inode(struct inode *, const struct qstr *);
Al Virob7f7a5e2013-01-25 16:15:43 -05001139int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001140void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
Jaegeuk Kimb97a9b52014-06-20 21:37:02 -07001141int f2fs_do_tmpfile(struct inode *, struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001142int f2fs_make_empty(struct inode *, struct inode *);
1143bool f2fs_empty_dir(struct inode *);
1144
Al Virob7f7a5e2013-01-25 16:15:43 -05001145static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1146{
1147 return __f2fs_add_link(dentry->d_parent->d_inode, &dentry->d_name,
1148 inode);
1149}
1150
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001151/*
1152 * super.c
1153 */
1154int f2fs_sync_fs(struct super_block *, int);
Namjae Jeona07ef782012-12-30 14:52:05 +09001155extern __printf(3, 4)
1156void f2fs_msg(struct super_block *, const char *, const char *, ...);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001157
1158/*
1159 * hash.c
1160 */
Leon Romanovsky9836b8b2012-12-27 19:55:46 +02001161f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001162
1163/*
1164 * node.c
1165 */
1166struct dnode_of_data;
1167struct node_info;
1168
Jaegeuk Kim6fb03f32014-04-16 10:47:06 +09001169bool available_free_memory(struct f2fs_sb_info *, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001170int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
Jaegeuk Kim479f40c2014-03-20 21:52:53 +09001171bool fsync_mark_done(struct f2fs_sb_info *, nid_t);
Jaegeuk Kimb6fe5872014-06-04 00:39:42 +09001172void fsync_mark_clear(struct f2fs_sb_info *, nid_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001173void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1174int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1175int truncate_inode_blocks(struct inode *, pgoff_t);
Jaegeuk Kim4f16fb02013-08-14 20:40:06 +09001176int truncate_xattr_node(struct inode *, struct page *);
Jaegeuk Kimcfe58f92013-10-31 14:57:01 +09001177int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
Gu Zheng58e674d2013-11-19 18:03:18 +08001178void remove_inode_page(struct inode *);
Jaegeuk Kima014e032014-06-20 21:44:02 -07001179struct page *new_inode_page(struct inode *);
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +09001180struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001181void ra_node_page(struct f2fs_sb_info *, nid_t);
1182struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1183struct page *get_node_page_ra(struct page *, int);
1184void sync_inode_page(struct dnode_of_data *);
1185int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1186bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1187void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1188void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1189void recover_node_page(struct f2fs_sb_info *, struct page *,
1190 struct f2fs_summary *, struct node_info *, block_t);
Jaegeuk Kimabb23662014-01-28 12:25:06 +09001191bool recover_xattr_data(struct inode *, struct page *, block_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001192int recover_inode_page(struct f2fs_sb_info *, struct page *);
1193int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1194 struct f2fs_summary_block *);
1195void flush_nat_entries(struct f2fs_sb_info *);
1196int build_node_manager(struct f2fs_sb_info *);
1197void destroy_node_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001198int __init create_node_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001199void destroy_node_manager_caches(void);
1200
1201/*
1202 * segment.c
1203 */
1204void f2fs_balance_fs(struct f2fs_sb_info *);
Jaegeuk Kim4660f9c2013-10-24 14:19:18 +09001205void f2fs_balance_fs_bg(struct f2fs_sb_info *);
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +09001206int f2fs_issue_flush(struct f2fs_sb_info *);
Gu Zheng2163d192014-04-27 14:21:33 +08001207int create_flush_cmd_control(struct f2fs_sb_info *);
1208void destroy_flush_cmd_control(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001209void invalidate_blocks(struct f2fs_sb_info *, block_t);
Jaegeuk Kim5e443812014-01-28 12:22:14 +09001210void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001211void clear_prefree_segments(struct f2fs_sb_info *);
Jaegeuk Kim1e87a782014-04-15 13:57:55 +09001212void discard_next_dnode(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001213int npages_for_summary_flush(struct f2fs_sb_info *);
1214void allocate_new_segments(struct f2fs_sb_info *);
1215struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001216void write_meta_page(struct f2fs_sb_info *, struct page *);
Jaegeuk Kimfb5566d2014-01-08 10:09:51 +09001217void write_node_page(struct f2fs_sb_info *, struct page *,
1218 struct f2fs_io_info *, unsigned int, block_t, block_t *);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001219void write_data_page(struct page *, struct dnode_of_data *, block_t *,
1220 struct f2fs_io_info *);
1221void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001222void recover_data_page(struct f2fs_sb_info *, struct page *,
1223 struct f2fs_summary *, block_t, block_t);
1224void rewrite_node_page(struct f2fs_sb_info *, struct page *,
1225 struct f2fs_summary *, block_t, block_t);
Jaegeuk Kimbfad7c22013-12-16 19:04:05 +09001226void allocate_data_block(struct f2fs_sb_info *, struct page *,
1227 block_t, block_t *, struct f2fs_summary *, int);
Yuan Zhong5514f0a2014-01-10 07:26:14 +00001228void f2fs_wait_on_page_writeback(struct page *, enum page_type);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001229void write_data_summaries(struct f2fs_sb_info *, block_t);
1230void write_node_summaries(struct f2fs_sb_info *, block_t);
1231int lookup_journal_in_cursum(struct f2fs_summary_block *,
1232 int, unsigned int, int);
1233void flush_sit_entries(struct f2fs_sb_info *);
1234int build_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001235void destroy_segment_manager(struct f2fs_sb_info *);
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001236int __init create_segment_manager_caches(void);
1237void destroy_segment_manager_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001238
1239/*
1240 * checkpoint.c
1241 */
1242struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1243struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
Chao Yu662befd2014-02-07 16:11:53 +08001244int ra_meta_pages(struct f2fs_sb_info *, int, int, int);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001245long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
Jaegeuk Kimcbd56e72013-07-30 11:36:53 +09001246int acquire_orphan_inode(struct f2fs_sb_info *);
1247void release_orphan_inode(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001248void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1249void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
Chao Yu8f99a942013-11-28 15:43:43 +08001250void recover_orphan_inodes(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001251int get_valid_checkpoint(struct f2fs_sb_info *);
1252void set_dirty_dir_page(struct inode *, struct page *);
Jaegeuk Kim5deb8262013-06-05 17:42:45 +09001253void add_dirty_dir_inode(struct inode *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001254void remove_dirty_dir_inode(struct inode *);
1255void sync_dirty_dir_inodes(struct f2fs_sb_info *);
Jaegeuk Kim43727522013-02-04 15:11:17 +09001256void write_checkpoint(struct f2fs_sb_info *, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001257void init_orphan_info(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001258int __init create_checkpoint_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001259void destroy_checkpoint_caches(void);
1260
1261/*
1262 * data.c
1263 */
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001264void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
Jaegeuk Kim93dfe2a2013-11-30 12:51:14 +09001265int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
1266void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001267 struct f2fs_io_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001268int reserve_new_block(struct dnode_of_data *);
Huajun Lib6009652013-11-10 23:13:18 +08001269int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001270void update_extent_cache(block_t, struct dnode_of_data *);
Jaegeuk Kimc718379b2013-04-24 13:19:56 +09001271struct page *find_data_page(struct inode *, pgoff_t, bool);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001272struct page *get_lock_data_page(struct inode *, pgoff_t);
Jaegeuk Kim64aa7ed2013-05-20 09:55:50 +09001273struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001274int do_write_data_page(struct page *, struct f2fs_io_info *);
Jaegeuk Kim9ab70132014-06-08 04:30:14 +09001275int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001276
1277/*
1278 * gc.c
1279 */
1280int start_gc_thread(struct f2fs_sb_info *);
1281void stop_gc_thread(struct f2fs_sb_info *);
Jaegeuk Kimde936532013-08-12 21:08:03 +09001282block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
Jaegeuk Kim408e9372013-01-03 17:55:52 +09001283int f2fs_gc(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001284void build_gc_manager(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001285int __init create_gc_caches(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001286void destroy_gc_caches(void);
1287
1288/*
1289 * recovery.c
1290 */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +09001291int recover_fsync_data(struct f2fs_sb_info *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001292bool space_for_roll_forward(struct f2fs_sb_info *);
1293
1294/*
1295 * debug.c
1296 */
1297#ifdef CONFIG_F2FS_STAT_FS
1298struct f2fs_stat_info {
1299 struct list_head stat_list;
1300 struct f2fs_sb_info *sbi;
1301 struct mutex stat_lock;
1302 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1303 int main_area_segs, main_area_sections, main_area_zones;
1304 int hit_ext, total_ext;
1305 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
1306 int nats, sits, fnids;
1307 int total_count, utilization;
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001308 int bg_gc, inline_inode;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001309 unsigned int valid_count, valid_node_count, valid_inode_count;
1310 unsigned int bimodal, avg_vblocks;
1311 int util_free, util_valid, util_invalid;
1312 int rsvd_segs, overp_segs;
1313 int dirty_count, node_pages, meta_pages;
Changman Lee942e0be2014-02-13 15:12:29 +09001314 int prefree_count, call_count, cp_count;
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001315 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1316 int tot_blks, data_blks, node_blks;
1317 int curseg[NR_CURSEG_TYPE];
1318 int cursec[NR_CURSEG_TYPE];
1319 int curzone[NR_CURSEG_TYPE];
1320
1321 unsigned int segment_count[2];
1322 unsigned int block_count[2];
1323 unsigned base_mem, cache_mem;
1324};
1325
Gu Zheng963d4f72013-07-12 14:47:11 +08001326static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1327{
Chris Fries6c311ec2014-01-17 14:44:39 -06001328 return (struct f2fs_stat_info *)sbi->stat_info;
Gu Zheng963d4f72013-07-12 14:47:11 +08001329}
1330
Changman Lee942e0be2014-02-13 15:12:29 +09001331#define stat_inc_cp_count(si) ((si)->cp_count++)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001332#define stat_inc_call_count(si) ((si)->call_count++)
1333#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1334#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1335#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
1336#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
1337#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001338#define stat_inc_inline_inode(inode) \
1339 do { \
1340 if (f2fs_has_inline_data(inode)) \
1341 ((F2FS_SB(inode->i_sb))->inline_inode++); \
1342 } while (0)
1343#define stat_dec_inline_inode(inode) \
1344 do { \
1345 if (f2fs_has_inline_data(inode)) \
1346 ((F2FS_SB(inode->i_sb))->inline_inode--); \
1347 } while (0)
1348
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001349#define stat_inc_seg_type(sbi, curseg) \
1350 ((sbi)->segment_count[(curseg)->alloc_type]++)
1351#define stat_inc_block_count(sbi, curseg) \
1352 ((sbi)->block_count[(curseg)->alloc_type]++)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001353
1354#define stat_inc_seg_count(sbi, type) \
1355 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001356 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001357 (si)->tot_segs++; \
1358 if (type == SUM_TYPE_DATA) \
1359 si->data_segs++; \
1360 else \
1361 si->node_segs++; \
1362 } while (0)
1363
1364#define stat_inc_tot_blk_count(si, blks) \
1365 (si->tot_blks += (blks))
1366
1367#define stat_inc_data_blk_count(sbi, blks) \
1368 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001369 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001370 stat_inc_tot_blk_count(si, blks); \
1371 si->data_blks += (blks); \
1372 } while (0)
1373
1374#define stat_inc_node_blk_count(sbi, blks) \
1375 do { \
Gu Zheng963d4f72013-07-12 14:47:11 +08001376 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001377 stat_inc_tot_blk_count(si, blks); \
1378 si->node_blks += (blks); \
1379 } while (0)
1380
1381int f2fs_build_stats(struct f2fs_sb_info *);
1382void f2fs_destroy_stats(struct f2fs_sb_info *);
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001383void __init f2fs_create_root_stats(void);
Namjae Jeon4589d252013-01-15 19:58:47 +09001384void f2fs_destroy_root_stats(void);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001385#else
Changman Lee942e0be2014-02-13 15:12:29 +09001386#define stat_inc_cp_count(si)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001387#define stat_inc_call_count(si)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001388#define stat_inc_bggc_count(si)
1389#define stat_inc_dirty_dir(sbi)
1390#define stat_dec_dirty_dir(sbi)
1391#define stat_inc_total_hit(sb)
1392#define stat_inc_read_hit(sb)
Jaegeuk Kim0dbdc2a2013-11-26 11:08:57 +09001393#define stat_inc_inline_inode(inode)
1394#define stat_dec_inline_inode(inode)
Jaegeuk Kimdcdfff62013-10-22 20:56:10 +09001395#define stat_inc_seg_type(sbi, curseg)
1396#define stat_inc_block_count(sbi, curseg)
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001397#define stat_inc_seg_count(si, type)
1398#define stat_inc_tot_blk_count(si, blks)
1399#define stat_inc_data_blk_count(si, blks)
1400#define stat_inc_node_blk_count(sbi, blks)
1401
1402static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
1403static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001404static inline void __init f2fs_create_root_stats(void) { }
Namjae Jeon4589d252013-01-15 19:58:47 +09001405static inline void f2fs_destroy_root_stats(void) { }
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001406#endif
1407
1408extern const struct file_operations f2fs_dir_operations;
1409extern const struct file_operations f2fs_file_operations;
1410extern const struct inode_operations f2fs_file_inode_operations;
1411extern const struct address_space_operations f2fs_dblock_aops;
1412extern const struct address_space_operations f2fs_node_aops;
1413extern const struct address_space_operations f2fs_meta_aops;
1414extern const struct inode_operations f2fs_dir_inode_operations;
1415extern const struct inode_operations f2fs_symlink_inode_operations;
1416extern const struct inode_operations f2fs_special_inode_operations;
Huajun Li1001b342013-11-10 23:13:16 +08001417
Huajun Lie18c65b2013-11-10 23:13:19 +08001418/*
1419 * inline.c
1420 */
Huajun Lie18c65b2013-11-10 23:13:19 +08001421bool f2fs_may_inline(struct inode *);
1422int f2fs_read_inline_data(struct inode *, struct page *);
Jaegeuk Kim9e09fc82013-12-27 12:28:59 +09001423int f2fs_convert_inline_data(struct inode *, pgoff_t);
Huajun Lie18c65b2013-11-10 23:13:19 +08001424int f2fs_write_inline_data(struct inode *, struct page *, unsigned int);
Chao Yu8aa6f1c2014-04-29 09:03:03 +08001425void truncate_inline_data(struct inode *, u64);
Jaegeuk Kim1e1bb4b2013-12-26 12:49:48 +09001426int recover_inline_data(struct inode *, struct page *);
Jaegeuk Kim39a53e02012-11-28 13:37:31 +09001427#endif