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f2fs: add a tracepoint for f2fs_read_data_pages
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0a8165d7 1/*
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2 * fs/f2fs/f2fs.h
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef _LINUX_F2FS_H
12#define _LINUX_F2FS_H
13
14#include <linux/types.h>
15#include <linux/page-flags.h>
16#include <linux/buffer_head.h>
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17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
c2d715d1 20#include <linux/kobject.h>
7bd59381 21#include <linux/sched.h>
39307a8e 22#include <linux/vmalloc.h>
740432f8 23#include <linux/bio.h>
39a53e0c 24
5d56b671 25#ifdef CONFIG_F2FS_CHECK_FS
9850cf4a 26#define f2fs_bug_on(sbi, condition) BUG_ON(condition)
0daaad97 27#define f2fs_down_write(x, y) down_write_nest_lock(x, y)
5d56b671 28#else
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29#define f2fs_bug_on(sbi, condition) \
30 do { \
31 if (unlikely(condition)) { \
32 WARN_ON(1); \
caf0047e 33 set_sbi_flag(sbi, SBI_NEED_FSCK); \
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34 } \
35 } while (0)
0daaad97 36#define f2fs_down_write(x, y) down_write(x)
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37#endif
38
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39/*
40 * For mount options
41 */
42#define F2FS_MOUNT_BG_GC 0x00000001
43#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
44#define F2FS_MOUNT_DISCARD 0x00000004
45#define F2FS_MOUNT_NOHEAP 0x00000008
46#define F2FS_MOUNT_XATTR_USER 0x00000010
47#define F2FS_MOUNT_POSIX_ACL 0x00000020
48#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
444c580f 49#define F2FS_MOUNT_INLINE_XATTR 0x00000080
1001b347 50#define F2FS_MOUNT_INLINE_DATA 0x00000100
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51#define F2FS_MOUNT_INLINE_DENTRY 0x00000200
52#define F2FS_MOUNT_FLUSH_MERGE 0x00000400
53#define F2FS_MOUNT_NOBARRIER 0x00000800
d5053a34 54#define F2FS_MOUNT_FASTBOOT 0x00001000
89672159 55#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
6aefd93b 56#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
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57
58#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
59#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
60#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
61
62#define ver_after(a, b) (typecheck(unsigned long long, a) && \
63 typecheck(unsigned long long, b) && \
64 ((long long)((a) - (b)) > 0))
65
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66typedef u32 block_t; /*
67 * should not change u32, since it is the on-disk block
68 * address format, __le32.
69 */
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70typedef u32 nid_t;
71
72struct f2fs_mount_info {
73 unsigned int opt;
74};
75
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76#define F2FS_FEATURE_ENCRYPT 0x0001
77
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78#define F2FS_HAS_FEATURE(sb, mask) \
79 ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0)
80#define F2FS_SET_FEATURE(sb, mask) \
81 F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask)
82#define F2FS_CLEAR_FEATURE(sb, mask) \
83 F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask)
84
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85#define CRCPOLY_LE 0xedb88320
86
87static inline __u32 f2fs_crc32(void *buf, size_t len)
39a53e0c 88{
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89 unsigned char *p = (unsigned char *)buf;
90 __u32 crc = F2FS_SUPER_MAGIC;
91 int i;
92
93 while (len--) {
94 crc ^= *p++;
95 for (i = 0; i < 8; i++)
96 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
97 }
98 return crc;
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99}
100
7e586fa0 101static inline bool f2fs_crc_valid(__u32 blk_crc, void *buf, size_t buf_size)
39a53e0c 102{
7e586fa0 103 return f2fs_crc32(buf, buf_size) == blk_crc;
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104}
105
106/*
107 * For checkpoint manager
108 */
109enum {
110 NAT_BITMAP,
111 SIT_BITMAP
112};
113
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114enum {
115 CP_UMOUNT,
119ee914 116 CP_FASTBOOT,
75ab4cb8 117 CP_SYNC,
10027551 118 CP_RECOVERY,
4b2fecc8 119 CP_DISCARD,
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120};
121
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122#define DEF_BATCHED_TRIM_SECTIONS 32
123#define BATCHED_TRIM_SEGMENTS(sbi) \
124 (SM_I(sbi)->trim_sections * (sbi)->segs_per_sec)
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125#define BATCHED_TRIM_BLOCKS(sbi) \
126 (BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg)
60b99b48 127#define DEF_CP_INTERVAL 60 /* 60 secs */
bba681cb 128
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129struct cp_control {
130 int reason;
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131 __u64 trim_start;
132 __u64 trim_end;
133 __u64 trim_minlen;
134 __u64 trimmed;
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135};
136
662befda 137/*
81c1a0f1 138 * For CP/NAT/SIT/SSA readahead
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139 */
140enum {
141 META_CP,
142 META_NAT,
81c1a0f1 143 META_SIT,
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144 META_SSA,
145 META_POR,
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146};
147
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148/* for the list of ino */
149enum {
150 ORPHAN_INO, /* for orphan ino list */
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151 APPEND_INO, /* for append ino list */
152 UPDATE_INO, /* for update ino list */
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153 MAX_INO_ENTRY, /* max. list */
154};
155
156struct ino_entry {
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157 struct list_head list; /* list head */
158 nid_t ino; /* inode number */
159};
160
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161/*
162 * for the list of directory inodes or gc inodes.
163 * NOTE: there are two slab users for this structure, if we add/modify/delete
164 * fields in structure for one of slab users, it may affect fields or size of
165 * other one, in this condition, it's better to split both of slab and related
166 * data structure.
167 */
168struct inode_entry {
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169 struct list_head list; /* list head */
170 struct inode *inode; /* vfs inode pointer */
171};
172
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173/* for the list of blockaddresses to be discarded */
174struct discard_entry {
175 struct list_head list; /* list head */
176 block_t blkaddr; /* block address to be discarded */
177 int len; /* # of consecutive blocks of the discard */
178};
179
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180/* for the list of fsync inodes, used only during recovery */
181struct fsync_inode_entry {
182 struct list_head list; /* list head */
183 struct inode *inode; /* vfs inode pointer */
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184 block_t blkaddr; /* block address locating the last fsync */
185 block_t last_dentry; /* block address locating the last dentry */
186 block_t last_inode; /* block address locating the last inode */
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187};
188
189#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
190#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
191
192#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
193#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
194#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
195#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
196
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197#define MAX_NAT_JENTRIES(sum) (NAT_JOURNAL_ENTRIES - nats_in_cursum(sum))
198#define MAX_SIT_JENTRIES(sum) (SIT_JOURNAL_ENTRIES - sits_in_cursum(sum))
199
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200static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
201{
202 int before = nats_in_cursum(rs);
203 rs->n_nats = cpu_to_le16(before + i);
204 return before;
205}
206
207static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
208{
209 int before = sits_in_cursum(rs);
210 rs->n_sits = cpu_to_le16(before + i);
211 return before;
212}
213
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214static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size,
215 int type)
216{
217 if (type == NAT_JOURNAL)
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218 return size <= MAX_NAT_JENTRIES(sum);
219 return size <= MAX_SIT_JENTRIES(sum);
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220}
221
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222/*
223 * ioctl commands
224 */
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225#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
226#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
d49f3e89 227#define F2FS_IOC_GETVERSION FS_IOC_GETVERSION
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228
229#define F2FS_IOCTL_MAGIC 0xf5
230#define F2FS_IOC_START_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 1)
231#define F2FS_IOC_COMMIT_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 2)
02a1335f 232#define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3)
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233#define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4)
234#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5)
c1c1b583 235#define F2FS_IOC_GARBAGE_COLLECT _IO(F2FS_IOCTL_MAGIC, 6)
456b88e4 236#define F2FS_IOC_WRITE_CHECKPOINT _IO(F2FS_IOCTL_MAGIC, 7)
e9750824 237
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238#define F2FS_IOC_SET_ENCRYPTION_POLICY \
239 _IOR('f', 19, struct f2fs_encryption_policy)
240#define F2FS_IOC_GET_ENCRYPTION_PWSALT \
241 _IOW('f', 20, __u8[16])
242#define F2FS_IOC_GET_ENCRYPTION_POLICY \
243 _IOW('f', 21, struct f2fs_encryption_policy)
244
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245/*
246 * should be same as XFS_IOC_GOINGDOWN.
247 * Flags for going down operation used by FS_IOC_GOINGDOWN
248 */
249#define F2FS_IOC_SHUTDOWN _IOR('X', 125, __u32) /* Shutdown */
250#define F2FS_GOING_DOWN_FULLSYNC 0x0 /* going down with full sync */
251#define F2FS_GOING_DOWN_METASYNC 0x1 /* going down with metadata */
252#define F2FS_GOING_DOWN_NOSYNC 0x2 /* going down */
c912a829 253#define F2FS_GOING_DOWN_METAFLUSH 0x3 /* going down with meta flush */
1abff93d 254
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255#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
256/*
257 * ioctl commands in 32 bit emulation
258 */
259#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
260#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
261#endif
262
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263/*
264 * For INODE and NODE manager
265 */
7b3cd7d6 266/* for directory operations */
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267struct f2fs_str {
268 unsigned char *name;
269 u32 len;
270};
271
272struct f2fs_filename {
273 const struct qstr *usr_fname;
274 struct f2fs_str disk_name;
275 f2fs_hash_t hash;
276#ifdef CONFIG_F2FS_FS_ENCRYPTION
277 struct f2fs_str crypto_buf;
278#endif
279};
280
281#define FSTR_INIT(n, l) { .name = n, .len = l }
282#define FSTR_TO_QSTR(f) QSTR_INIT((f)->name, (f)->len)
283#define fname_name(p) ((p)->disk_name.name)
284#define fname_len(p) ((p)->disk_name.len)
285
7b3cd7d6 286struct f2fs_dentry_ptr {
d8c6822a 287 struct inode *inode;
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288 const void *bitmap;
289 struct f2fs_dir_entry *dentry;
290 __u8 (*filename)[F2FS_SLOT_LEN];
291 int max;
292};
293
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294static inline void make_dentry_ptr(struct inode *inode,
295 struct f2fs_dentry_ptr *d, void *src, int type)
7b3cd7d6 296{
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297 d->inode = inode;
298
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299 if (type == 1) {
300 struct f2fs_dentry_block *t = (struct f2fs_dentry_block *)src;
301 d->max = NR_DENTRY_IN_BLOCK;
302 d->bitmap = &t->dentry_bitmap;
303 d->dentry = t->dentry;
304 d->filename = t->filename;
305 } else {
306 struct f2fs_inline_dentry *t = (struct f2fs_inline_dentry *)src;
307 d->max = NR_INLINE_DENTRY;
308 d->bitmap = &t->dentry_bitmap;
309 d->dentry = t->dentry;
310 d->filename = t->filename;
311 }
312}
313
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314/*
315 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
316 * as its node offset to distinguish from index node blocks.
317 * But some bits are used to mark the node block.
318 */
319#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
320 >> OFFSET_BIT_SHIFT)
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321enum {
322 ALLOC_NODE, /* allocate a new node page if needed */
323 LOOKUP_NODE, /* look up a node without readahead */
324 LOOKUP_NODE_RA, /*
325 * look up a node with readahead called
4f4124d0 326 * by get_data_block.
39a53e0c 327 */
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328};
329
a6db67f0 330#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
39a53e0c 331
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332#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
333
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334/* vector size for gang look-up from extent cache that consists of radix tree */
335#define EXT_TREE_VEC_SIZE 64
336
39a53e0c 337/* for in-memory extent cache entry */
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338#define F2FS_MIN_EXTENT_LEN 64 /* minimum extent length */
339
340/* number of extent info in extent cache we try to shrink */
341#define EXTENT_CACHE_SHRINK_NUMBER 128
c11abd1a 342
39a53e0c 343struct extent_info {
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344 unsigned int fofs; /* start offset in a file */
345 u32 blk; /* start block address of the extent */
346 unsigned int len; /* length of the extent */
347};
348
349struct extent_node {
350 struct rb_node rb_node; /* rb node located in rb-tree */
351 struct list_head list; /* node in global extent list of sbi */
352 struct extent_info ei; /* extent info */
353};
354
355struct extent_tree {
356 nid_t ino; /* inode number */
357 struct rb_root root; /* root of extent info rb-tree */
62c8af65 358 struct extent_node *cached_en; /* recently accessed extent node */
3e72f721 359 struct extent_info largest; /* largested extent info */
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360 rwlock_t lock; /* protect extent info rb-tree */
361 atomic_t refcount; /* reference count of rb-tree */
362 unsigned int count; /* # of extent node in rb-tree*/
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363};
364
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365/*
366 * This structure is taken from ext4_map_blocks.
367 *
368 * Note that, however, f2fs uses NEW and MAPPED flags for f2fs_map_blocks().
369 */
370#define F2FS_MAP_NEW (1 << BH_New)
371#define F2FS_MAP_MAPPED (1 << BH_Mapped)
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372#define F2FS_MAP_UNWRITTEN (1 << BH_Unwritten)
373#define F2FS_MAP_FLAGS (F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
374 F2FS_MAP_UNWRITTEN)
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375
376struct f2fs_map_blocks {
377 block_t m_pblk;
378 block_t m_lblk;
379 unsigned int m_len;
380 unsigned int m_flags;
381};
382
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383/* for flag in get_data_block */
384#define F2FS_GET_BLOCK_READ 0
385#define F2FS_GET_BLOCK_DIO 1
386#define F2FS_GET_BLOCK_FIEMAP 2
387#define F2FS_GET_BLOCK_BMAP 3
388
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389/*
390 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
391 */
392#define FADVISE_COLD_BIT 0x01
354a3399 393#define FADVISE_LOST_PINO_BIT 0x02
cde4de12 394#define FADVISE_ENCRYPT_BIT 0x04
e7d55452 395#define FADVISE_ENC_NAME_BIT 0x08
39a53e0c 396
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397#define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
398#define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
399#define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
400#define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
401#define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
402#define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
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403#define file_is_encrypt(inode) is_file(inode, FADVISE_ENCRYPT_BIT)
404#define file_set_encrypt(inode) set_file(inode, FADVISE_ENCRYPT_BIT)
405#define file_clear_encrypt(inode) clear_file(inode, FADVISE_ENCRYPT_BIT)
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406#define file_enc_name(inode) is_file(inode, FADVISE_ENC_NAME_BIT)
407#define file_set_enc_name(inode) set_file(inode, FADVISE_ENC_NAME_BIT)
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408
409/* Encryption algorithms */
410#define F2FS_ENCRYPTION_MODE_INVALID 0
411#define F2FS_ENCRYPTION_MODE_AES_256_XTS 1
412#define F2FS_ENCRYPTION_MODE_AES_256_GCM 2
413#define F2FS_ENCRYPTION_MODE_AES_256_CBC 3
414#define F2FS_ENCRYPTION_MODE_AES_256_CTS 4
b5492af7 415
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416#include "f2fs_crypto.h"
417
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418#define DEF_DIR_LEVEL 0
419
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420struct f2fs_inode_info {
421 struct inode vfs_inode; /* serve a vfs inode */
422 unsigned long i_flags; /* keep an inode flags for ioctl */
423 unsigned char i_advise; /* use to give file attribute hints */
38431545 424 unsigned char i_dir_level; /* use for dentry level for large dir */
39a53e0c 425 unsigned int i_current_depth; /* use only in directory structure */
6666e6aa 426 unsigned int i_pino; /* parent inode number */
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427 umode_t i_acl_mode; /* keep file acl mode temporarily */
428
429 /* Use below internally in f2fs*/
430 unsigned long flags; /* use to pass per-file flags */
d928bfbf 431 struct rw_semaphore i_sem; /* protect fi info */
a7ffdbe2 432 atomic_t dirty_pages; /* # of dirty pages */
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433 f2fs_hash_t chash; /* hash value of given file name */
434 unsigned int clevel; /* maximum level of given file name */
435 nid_t i_xattr_nid; /* node id that contains xattrs */
e518ff81 436 unsigned long long xattr_ver; /* cp version of xattr modification */
06292073 437 struct inode_entry *dirty_dir; /* the pointer of dirty dir */
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438
439 struct list_head inmem_pages; /* inmemory pages managed by f2fs */
440 struct mutex inmem_lock; /* lock for inmemory pages */
cde4de12 441
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442 struct extent_tree *extent_tree; /* cached extent_tree entry */
443
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444#ifdef CONFIG_F2FS_FS_ENCRYPTION
445 /* Encryption params */
446 struct f2fs_crypt_info *i_crypt_info;
447#endif
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448};
449
450static inline void get_extent_info(struct extent_info *ext,
451 struct f2fs_extent i_ext)
452{
39a53e0c 453 ext->fofs = le32_to_cpu(i_ext.fofs);
4d0b0bd4 454 ext->blk = le32_to_cpu(i_ext.blk);
39a53e0c 455 ext->len = le32_to_cpu(i_ext.len);
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456}
457
458static inline void set_raw_extent(struct extent_info *ext,
459 struct f2fs_extent *i_ext)
460{
39a53e0c 461 i_ext->fofs = cpu_to_le32(ext->fofs);
4d0b0bd4 462 i_ext->blk = cpu_to_le32(ext->blk);
39a53e0c 463 i_ext->len = cpu_to_le32(ext->len);
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464}
465
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466static inline void set_extent_info(struct extent_info *ei, unsigned int fofs,
467 u32 blk, unsigned int len)
468{
469 ei->fofs = fofs;
470 ei->blk = blk;
471 ei->len = len;
472}
473
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474static inline bool __is_extent_same(struct extent_info *ei1,
475 struct extent_info *ei2)
476{
477 return (ei1->fofs == ei2->fofs && ei1->blk == ei2->blk &&
478 ei1->len == ei2->len);
479}
480
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481static inline bool __is_extent_mergeable(struct extent_info *back,
482 struct extent_info *front)
483{
484 return (back->fofs + back->len == front->fofs &&
485 back->blk + back->len == front->blk);
486}
487
488static inline bool __is_back_mergeable(struct extent_info *cur,
489 struct extent_info *back)
490{
491 return __is_extent_mergeable(back, cur);
492}
493
494static inline bool __is_front_mergeable(struct extent_info *cur,
495 struct extent_info *front)
496{
497 return __is_extent_mergeable(cur, front);
498}
499
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500static inline void __try_update_largest_extent(struct extent_tree *et,
501 struct extent_node *en)
502{
503 if (en->ei.len > et->largest.len)
504 et->largest = en->ei;
505}
506
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507struct f2fs_nm_info {
508 block_t nat_blkaddr; /* base disk address of NAT */
509 nid_t max_nid; /* maximum possible node ids */
7ee0eeab 510 nid_t available_nids; /* maximum available node ids */
39a53e0c 511 nid_t next_scan_nid; /* the next nid to be scanned */
cdfc41c1 512 unsigned int ram_thresh; /* control the memory footprint */
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513
514 /* NAT cache management */
515 struct radix_tree_root nat_root;/* root of the nat entry cache */
309cc2b6 516 struct radix_tree_root nat_set_root;/* root of the nat set cache */
8b26ef98 517 struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
39a53e0c 518 struct list_head nat_entries; /* cached nat entry list (clean) */
309cc2b6 519 unsigned int nat_cnt; /* the # of cached nat entries */
aec71382 520 unsigned int dirty_nat_cnt; /* total num of nat entries in set */
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521
522 /* free node ids management */
8a7ed66a 523 struct radix_tree_root free_nid_root;/* root of the free_nid cache */
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524 struct list_head free_nid_list; /* a list for free nids */
525 spinlock_t free_nid_list_lock; /* protect free nid list */
526 unsigned int fcnt; /* the number of free node id */
527 struct mutex build_lock; /* lock for build free nids */
528
529 /* for checkpoint */
530 char *nat_bitmap; /* NAT bitmap pointer */
531 int bitmap_size; /* bitmap size */
532};
533
534/*
535 * this structure is used as one of function parameters.
536 * all the information are dedicated to a given direct node block determined
537 * by the data offset in a file.
538 */
539struct dnode_of_data {
540 struct inode *inode; /* vfs inode pointer */
541 struct page *inode_page; /* its inode page, NULL is possible */
542 struct page *node_page; /* cached direct node page */
543 nid_t nid; /* node id of the direct node block */
544 unsigned int ofs_in_node; /* data offset in the node page */
545 bool inode_page_locked; /* inode page is locked or not */
546 block_t data_blkaddr; /* block address of the node block */
547};
548
549static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
550 struct page *ipage, struct page *npage, nid_t nid)
551{
d66d1f76 552 memset(dn, 0, sizeof(*dn));
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553 dn->inode = inode;
554 dn->inode_page = ipage;
555 dn->node_page = npage;
556 dn->nid = nid;
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557}
558
559/*
560 * For SIT manager
561 *
562 * By default, there are 6 active log areas across the whole main area.
563 * When considering hot and cold data separation to reduce cleaning overhead,
564 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
565 * respectively.
566 * In the current design, you should not change the numbers intentionally.
567 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
568 * logs individually according to the underlying devices. (default: 6)
569 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
570 * data and 8 for node logs.
571 */
572#define NR_CURSEG_DATA_TYPE (3)
573#define NR_CURSEG_NODE_TYPE (3)
574#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
575
576enum {
577 CURSEG_HOT_DATA = 0, /* directory entry blocks */
578 CURSEG_WARM_DATA, /* data blocks */
579 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
580 CURSEG_HOT_NODE, /* direct node blocks of directory files */
581 CURSEG_WARM_NODE, /* direct node blocks of normal files */
582 CURSEG_COLD_NODE, /* indirect node blocks */
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583 NO_CHECK_TYPE,
584 CURSEG_DIRECT_IO, /* to use for the direct IO path */
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585};
586
6b4afdd7 587struct flush_cmd {
6b4afdd7 588 struct completion wait;
721bd4d5 589 struct llist_node llnode;
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590 int ret;
591};
592
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593struct flush_cmd_control {
594 struct task_struct *f2fs_issue_flush; /* flush thread */
595 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
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596 struct llist_head issue_list; /* list for command issue */
597 struct llist_node *dispatch_list; /* list for command dispatch */
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598};
599
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600struct f2fs_sm_info {
601 struct sit_info *sit_info; /* whole segment information */
602 struct free_segmap_info *free_info; /* free segment information */
603 struct dirty_seglist_info *dirty_info; /* dirty segment information */
604 struct curseg_info *curseg_array; /* active segment information */
605
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606 block_t seg0_blkaddr; /* block address of 0'th segment */
607 block_t main_blkaddr; /* start block address of main area */
608 block_t ssa_blkaddr; /* start block address of SSA area */
609
610 unsigned int segment_count; /* total # of segments */
611 unsigned int main_segments; /* # of segments in main area */
612 unsigned int reserved_segments; /* # of reserved segments */
613 unsigned int ovp_segments; /* # of overprovision segments */
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614
615 /* a threshold to reclaim prefree segments */
616 unsigned int rec_prefree_segments;
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617
618 /* for small discard management */
619 struct list_head discard_list; /* 4KB discard list */
620 int nr_discards; /* # of discards in the list */
621 int max_discards; /* max. discards to be issued */
216fbd64 622
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623 /* for batched trimming */
624 unsigned int trim_sections; /* # of sections to trim */
625
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626 struct list_head sit_entry_set; /* sit entry set list */
627
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628 unsigned int ipu_policy; /* in-place-update policy */
629 unsigned int min_ipu_util; /* in-place-update threshold */
c1ce1b02 630 unsigned int min_fsync_blocks; /* threshold for fsync */
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631
632 /* for flush command control */
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633 struct flush_cmd_control *cmd_control_info;
634
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635};
636
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637/*
638 * For superblock
639 */
640/*
641 * COUNT_TYPE for monitoring
642 *
643 * f2fs monitors the number of several block types such as on-writeback,
644 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
645 */
646enum count_type {
647 F2FS_WRITEBACK,
648 F2FS_DIRTY_DENTS,
649 F2FS_DIRTY_NODES,
650 F2FS_DIRTY_META,
8dcf2ff7 651 F2FS_INMEM_PAGES,
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652 NR_COUNT_TYPE,
653};
654
39a53e0c 655/*
e1c42045 656 * The below are the page types of bios used in submit_bio().
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657 * The available types are:
658 * DATA User data pages. It operates as async mode.
659 * NODE Node pages. It operates as async mode.
660 * META FS metadata pages such as SIT, NAT, CP.
661 * NR_PAGE_TYPE The number of page types.
662 * META_FLUSH Make sure the previous pages are written
663 * with waiting the bio's completion
664 * ... Only can be used with META.
665 */
7d5e5109 666#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
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667enum page_type {
668 DATA,
669 NODE,
670 META,
671 NR_PAGE_TYPE,
672 META_FLUSH,
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673 INMEM, /* the below types are used by tracepoints only. */
674 INMEM_DROP,
675 IPU,
676 OPU,
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677};
678
458e6197 679struct f2fs_io_info {
05ca3632 680 struct f2fs_sb_info *sbi; /* f2fs_sb_info pointer */
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681 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
682 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
cf04e8eb 683 block_t blk_addr; /* block address to be written */
05ca3632 684 struct page *page; /* page to be written */
4375a336 685 struct page *encrypted_page; /* encrypted page */
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686};
687
93dfe2ac 688#define is_read_io(rw) (((rw) & 1) == READ)
1ff7bd3b 689struct f2fs_bio_info {
458e6197 690 struct f2fs_sb_info *sbi; /* f2fs superblock */
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691 struct bio *bio; /* bios to merge */
692 sector_t last_block_in_bio; /* last block number */
458e6197 693 struct f2fs_io_info fio; /* store buffered io info. */
df0f8dc0 694 struct rw_semaphore io_rwsem; /* blocking op for bio */
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695};
696
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697/* for inner inode cache management */
698struct inode_management {
699 struct radix_tree_root ino_root; /* ino entry array */
700 spinlock_t ino_lock; /* for ino entry lock */
701 struct list_head ino_list; /* inode list head */
702 unsigned long ino_num; /* number of entries */
703};
704
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705/* For s_flag in struct f2fs_sb_info */
706enum {
707 SBI_IS_DIRTY, /* dirty flag for checkpoint */
708 SBI_IS_CLOSE, /* specify unmounting */
709 SBI_NEED_FSCK, /* need fsck.f2fs to fix */
710 SBI_POR_DOING, /* recovery is doing or not */
711};
712
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713struct f2fs_sb_info {
714 struct super_block *sb; /* pointer to VFS super block */
5e176d54 715 struct proc_dir_entry *s_proc; /* proc entry */
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716 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
717 struct f2fs_super_block *raw_super; /* raw super block pointer */
caf0047e 718 int s_flag; /* flags for sbi */
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719
720 /* for node-related operations */
721 struct f2fs_nm_info *nm_info; /* node manager */
722 struct inode *node_inode; /* cache node blocks */
723
724 /* for segment-related operations */
725 struct f2fs_sm_info *sm_info; /* segment manager */
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726
727 /* for bio operations */
924b720b 728 struct f2fs_bio_info read_io; /* for read bios */
1ff7bd3b 729 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
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730
731 /* for checkpoint */
732 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
733 struct inode *meta_inode; /* cache meta blocks */
39936837 734 struct mutex cp_mutex; /* checkpoint procedure lock */
e479556b 735 struct rw_semaphore cp_rwsem; /* blocking FS operations */
b3582c68 736 struct rw_semaphore node_write; /* locking node writes */
5463e7c1 737 struct mutex writepages; /* mutex for writepages() */
fb51b5ef 738 wait_queue_head_t cp_wait;
60b99b48 739 long cp_expires, cp_interval; /* next expected periodic cp */
39a53e0c 740
67298804 741 struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
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742
743 /* for orphan inode, use 0'th array */
0d47c1ad 744 unsigned int max_orphans; /* max orphan inodes */
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745
746 /* for directory inode management */
747 struct list_head dir_inode_list; /* dir inode list */
748 spinlock_t dir_inode_lock; /* for dir inode list lock */
39a53e0c 749
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750 /* for extent tree cache */
751 struct radix_tree_root extent_tree_root;/* cache extent cache entries */
752 struct rw_semaphore extent_tree_lock; /* locking extent radix tree */
753 struct list_head extent_list; /* lru list for shrinker */
754 spinlock_t extent_lock; /* locking extent lru list */
755 int total_ext_tree; /* extent tree count */
756 atomic_t total_ext_node; /* extent info count */
757
e1c42045 758 /* basic filesystem units */
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759 unsigned int log_sectors_per_block; /* log2 sectors per block */
760 unsigned int log_blocksize; /* log2 block size */
761 unsigned int blocksize; /* block size */
762 unsigned int root_ino_num; /* root inode number*/
763 unsigned int node_ino_num; /* node inode number*/
764 unsigned int meta_ino_num; /* meta inode number*/
765 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
766 unsigned int blocks_per_seg; /* blocks per segment */
767 unsigned int segs_per_sec; /* segments per section */
768 unsigned int secs_per_zone; /* sections per zone */
769 unsigned int total_sections; /* total section count */
770 unsigned int total_node_count; /* total node block count */
771 unsigned int total_valid_node_count; /* valid node block count */
772 unsigned int total_valid_inode_count; /* valid inode count */
773 int active_logs; /* # of active logs */
ab9fa662 774 int dir_level; /* directory level */
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775
776 block_t user_block_count; /* # of user blocks */
777 block_t total_valid_block_count; /* # of valid blocks */
778 block_t alloc_valid_block_count; /* # of allocated blocks */
a66cdd98 779 block_t discard_blks; /* discard command candidats */
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780 block_t last_valid_block_count; /* for recovery */
781 u32 s_next_generation; /* for NFS support */
782 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
783
784 struct f2fs_mount_info mount_opt; /* mount options */
785
786 /* for cleaning operations */
787 struct mutex gc_mutex; /* mutex for GC */
788 struct f2fs_gc_kthread *gc_thread; /* GC thread */
5ec4e49f 789 unsigned int cur_victim_sec; /* current victim section num */
39a53e0c 790
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791 /* maximum # of trials to find a victim segment for SSR and GC */
792 unsigned int max_victim_search;
793
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794 /*
795 * for stat information.
796 * one is for the LFS mode, and the other is for the SSR mode.
797 */
35b09d82 798#ifdef CONFIG_F2FS_STAT_FS
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799 struct f2fs_stat_info *stat_info; /* FS status information */
800 unsigned int segment_count[2]; /* # of allocated segments */
801 unsigned int block_count[2]; /* # of allocated blocks */
b9a2c252 802 atomic_t inplace_count; /* # of inplace update */
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803 atomic64_t total_hit_ext; /* # of lookup extent cache */
804 atomic64_t read_hit_rbtree; /* # of hit rbtree extent node */
805 atomic64_t read_hit_largest; /* # of hit largest extent node */
806 atomic64_t read_hit_cached; /* # of hit cached extent node */
d5e8f6c9 807 atomic_t inline_xattr; /* # of inline_xattr inodes */
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808 atomic_t inline_inode; /* # of inline_data inodes */
809 atomic_t inline_dir; /* # of inline_dentry inodes */
39a53e0c 810 int bg_gc; /* background gc calls */
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811 unsigned int n_dirty_dirs; /* # of dir inodes */
812#endif
813 unsigned int last_victim[2]; /* last victim segment # */
39a53e0c 814 spinlock_t stat_lock; /* lock for stat operations */
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815
816 /* For sysfs suppport */
817 struct kobject s_kobj;
818 struct completion s_kobj_unregister;
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819
820 /* For shrinker support */
821 struct list_head s_list;
822 struct mutex umount_mutex;
823 unsigned int shrinker_run_no;
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824};
825
826/*
827 * Inline functions
828 */
829static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
830{
831 return container_of(inode, struct f2fs_inode_info, vfs_inode);
832}
833
834static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
835{
836 return sb->s_fs_info;
837}
838
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839static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
840{
841 return F2FS_SB(inode->i_sb);
842}
843
844static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
845{
846 return F2FS_I_SB(mapping->host);
847}
848
849static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
850{
851 return F2FS_M_SB(page->mapping);
852}
853
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854static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
855{
856 return (struct f2fs_super_block *)(sbi->raw_super);
857}
858
859static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
860{
861 return (struct f2fs_checkpoint *)(sbi->ckpt);
862}
863
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864static inline struct f2fs_node *F2FS_NODE(struct page *page)
865{
866 return (struct f2fs_node *)page_address(page);
867}
868
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869static inline struct f2fs_inode *F2FS_INODE(struct page *page)
870{
871 return &((struct f2fs_node *)page_address(page))->i;
872}
873
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874static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
875{
876 return (struct f2fs_nm_info *)(sbi->nm_info);
877}
878
879static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
880{
881 return (struct f2fs_sm_info *)(sbi->sm_info);
882}
883
884static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
885{
886 return (struct sit_info *)(SM_I(sbi)->sit_info);
887}
888
889static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
890{
891 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
892}
893
894static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
895{
896 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
897}
898
9df27d98
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899static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
900{
901 return sbi->meta_inode->i_mapping;
902}
903
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904static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
905{
906 return sbi->node_inode->i_mapping;
907}
908
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909static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
910{
911 return sbi->s_flag & (0x01 << type);
912}
913
914static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
39a53e0c 915{
caf0047e 916 sbi->s_flag |= (0x01 << type);
39a53e0c
JK
917}
918
caf0047e 919static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
39a53e0c 920{
caf0047e 921 sbi->s_flag &= ~(0x01 << type);
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922}
923
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924static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
925{
926 return le64_to_cpu(cp->checkpoint_ver);
927}
928
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929static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
930{
931 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
932 return ckpt_flags & f;
933}
934
935static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
936{
937 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
938 ckpt_flags |= f;
939 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
940}
941
942static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
943{
944 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
945 ckpt_flags &= (~f);
946 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
947}
948
e479556b 949static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
39936837 950{
e479556b 951 down_read(&sbi->cp_rwsem);
39936837
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952}
953
e479556b 954static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
39a53e0c 955{
e479556b 956 up_read(&sbi->cp_rwsem);
39a53e0c
JK
957}
958
e479556b 959static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
39a53e0c 960{
0daaad97 961 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
39936837
JK
962}
963
e479556b 964static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
39936837 965{
e479556b 966 up_write(&sbi->cp_rwsem);
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967}
968
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969static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
970{
971 int reason = CP_SYNC;
972
973 if (test_opt(sbi, FASTBOOT))
974 reason = CP_FASTBOOT;
975 if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))
976 reason = CP_UMOUNT;
977 return reason;
978}
979
980static inline bool __remain_node_summaries(int reason)
981{
982 return (reason == CP_UMOUNT || reason == CP_FASTBOOT);
983}
984
985static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
986{
987 return (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG) ||
988 is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FASTBOOT_FLAG));
989}
990
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991/*
992 * Check whether the given nid is within node id range.
993 */
064e0823 994static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
39a53e0c 995{
d6b7d4b3
CY
996 if (unlikely(nid < F2FS_ROOT_INO(sbi)))
997 return -EINVAL;
cfb271d4 998 if (unlikely(nid >= NM_I(sbi)->max_nid))
064e0823
NJ
999 return -EINVAL;
1000 return 0;
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JK
1001}
1002
1003#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
1004
1005/*
1006 * Check whether the inode has blocks or not
1007 */
1008static inline int F2FS_HAS_BLOCKS(struct inode *inode)
1009{
1010 if (F2FS_I(inode)->i_xattr_nid)
6c311ec6 1011 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
39a53e0c 1012 else
6c311ec6 1013 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
39a53e0c
JK
1014}
1015
4bc8e9bc
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1016static inline bool f2fs_has_xattr_block(unsigned int ofs)
1017{
1018 return ofs == XATTR_NODE_OFFSET;
1019}
1020
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1021static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
1022 struct inode *inode, blkcnt_t count)
1023{
1024 block_t valid_block_count;
1025
1026 spin_lock(&sbi->stat_lock);
1027 valid_block_count =
1028 sbi->total_valid_block_count + (block_t)count;
cfb271d4 1029 if (unlikely(valid_block_count > sbi->user_block_count)) {
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1030 spin_unlock(&sbi->stat_lock);
1031 return false;
1032 }
1033 inode->i_blocks += count;
1034 sbi->total_valid_block_count = valid_block_count;
1035 sbi->alloc_valid_block_count += (block_t)count;
1036 spin_unlock(&sbi->stat_lock);
1037 return true;
1038}
1039
da19b0dc 1040static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
39a53e0c
JK
1041 struct inode *inode,
1042 blkcnt_t count)
1043{
1044 spin_lock(&sbi->stat_lock);
9850cf4a
JK
1045 f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
1046 f2fs_bug_on(sbi, inode->i_blocks < count);
39a53e0c
JK
1047 inode->i_blocks -= count;
1048 sbi->total_valid_block_count -= (block_t)count;
1049 spin_unlock(&sbi->stat_lock);
39a53e0c
JK
1050}
1051
1052static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
1053{
1054 atomic_inc(&sbi->nr_pages[count_type]);
caf0047e 1055 set_sbi_flag(sbi, SBI_IS_DIRTY);
39a53e0c
JK
1056}
1057
a7ffdbe2 1058static inline void inode_inc_dirty_pages(struct inode *inode)
39a53e0c 1059{
a7ffdbe2
JK
1060 atomic_inc(&F2FS_I(inode)->dirty_pages);
1061 if (S_ISDIR(inode->i_mode))
1062 inc_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS);
39a53e0c
JK
1063}
1064
1065static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
1066{
1067 atomic_dec(&sbi->nr_pages[count_type]);
1068}
1069
a7ffdbe2 1070static inline void inode_dec_dirty_pages(struct inode *inode)
39a53e0c 1071{
5ac9f36f
CY
1072 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1073 !S_ISLNK(inode->i_mode))
1fe54f9d
JK
1074 return;
1075
a7ffdbe2
JK
1076 atomic_dec(&F2FS_I(inode)->dirty_pages);
1077
1078 if (S_ISDIR(inode->i_mode))
1079 dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS);
39a53e0c
JK
1080}
1081
1082static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
1083{
1084 return atomic_read(&sbi->nr_pages[count_type]);
1085}
1086
a7ffdbe2 1087static inline int get_dirty_pages(struct inode *inode)
f8b2c1f9 1088{
a7ffdbe2 1089 return atomic_read(&F2FS_I(inode)->dirty_pages);
f8b2c1f9
JK
1090}
1091
5ac206cf
NJ
1092static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
1093{
1094 unsigned int pages_per_sec = sbi->segs_per_sec *
1095 (1 << sbi->log_blocks_per_seg);
1096 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
1097 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
1098}
1099
39a53e0c
JK
1100static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
1101{
8b8343fa 1102 return sbi->total_valid_block_count;
39a53e0c
JK
1103}
1104
1105static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
1106{
1107 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1108
1109 /* return NAT or SIT bitmap */
1110 if (flag == NAT_BITMAP)
1111 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
1112 else if (flag == SIT_BITMAP)
1113 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
1114
1115 return 0;
1116}
1117
55141486
WL
1118static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
1119{
1120 return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
1121}
1122
39a53e0c
JK
1123static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
1124{
1125 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1dbe4152
CL
1126 int offset;
1127
55141486 1128 if (__cp_payload(sbi) > 0) {
1dbe4152
CL
1129 if (flag == NAT_BITMAP)
1130 return &ckpt->sit_nat_version_bitmap;
1131 else
65b85ccc 1132 return (unsigned char *)ckpt + F2FS_BLKSIZE;
1dbe4152
CL
1133 } else {
1134 offset = (flag == NAT_BITMAP) ?
25ca923b 1135 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
1dbe4152
CL
1136 return &ckpt->sit_nat_version_bitmap + offset;
1137 }
39a53e0c
JK
1138}
1139
1140static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
1141{
1142 block_t start_addr;
1143 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
d71b5564 1144 unsigned long long ckpt_version = cur_cp_version(ckpt);
39a53e0c 1145
25ca923b 1146 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
39a53e0c
JK
1147
1148 /*
1149 * odd numbered checkpoint should at cp segment 0
e1c42045 1150 * and even segment must be at cp segment 1
39a53e0c
JK
1151 */
1152 if (!(ckpt_version & 1))
1153 start_addr += sbi->blocks_per_seg;
1154
1155 return start_addr;
1156}
1157
1158static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
1159{
1160 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
1161}
1162
1163static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 1164 struct inode *inode)
39a53e0c
JK
1165{
1166 block_t valid_block_count;
1167 unsigned int valid_node_count;
1168
1169 spin_lock(&sbi->stat_lock);
1170
ef86d709 1171 valid_block_count = sbi->total_valid_block_count + 1;
cfb271d4 1172 if (unlikely(valid_block_count > sbi->user_block_count)) {
39a53e0c
JK
1173 spin_unlock(&sbi->stat_lock);
1174 return false;
1175 }
1176
ef86d709 1177 valid_node_count = sbi->total_valid_node_count + 1;
cfb271d4 1178 if (unlikely(valid_node_count > sbi->total_node_count)) {
39a53e0c
JK
1179 spin_unlock(&sbi->stat_lock);
1180 return false;
1181 }
1182
1183 if (inode)
ef86d709
GZ
1184 inode->i_blocks++;
1185
1186 sbi->alloc_valid_block_count++;
1187 sbi->total_valid_node_count++;
1188 sbi->total_valid_block_count++;
39a53e0c
JK
1189 spin_unlock(&sbi->stat_lock);
1190
1191 return true;
1192}
1193
1194static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 1195 struct inode *inode)
39a53e0c
JK
1196{
1197 spin_lock(&sbi->stat_lock);
1198
9850cf4a
JK
1199 f2fs_bug_on(sbi, !sbi->total_valid_block_count);
1200 f2fs_bug_on(sbi, !sbi->total_valid_node_count);
1201 f2fs_bug_on(sbi, !inode->i_blocks);
39a53e0c 1202
ef86d709
GZ
1203 inode->i_blocks--;
1204 sbi->total_valid_node_count--;
1205 sbi->total_valid_block_count--;
39a53e0c
JK
1206
1207 spin_unlock(&sbi->stat_lock);
1208}
1209
1210static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
1211{
8b8343fa 1212 return sbi->total_valid_node_count;
39a53e0c
JK
1213}
1214
1215static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
1216{
1217 spin_lock(&sbi->stat_lock);
9850cf4a 1218 f2fs_bug_on(sbi, sbi->total_valid_inode_count == sbi->total_node_count);
39a53e0c
JK
1219 sbi->total_valid_inode_count++;
1220 spin_unlock(&sbi->stat_lock);
1221}
1222
0e80220a 1223static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
39a53e0c
JK
1224{
1225 spin_lock(&sbi->stat_lock);
9850cf4a 1226 f2fs_bug_on(sbi, !sbi->total_valid_inode_count);
39a53e0c
JK
1227 sbi->total_valid_inode_count--;
1228 spin_unlock(&sbi->stat_lock);
39a53e0c
JK
1229}
1230
1231static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
1232{
8b8343fa 1233 return sbi->total_valid_inode_count;
39a53e0c
JK
1234}
1235
a56c7c6f
JK
1236static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
1237 pgoff_t index, bool for_write)
1238{
1239 if (!for_write)
1240 return grab_cache_page(mapping, index);
1241 return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
1242}
1243
6e2c64ad
JK
1244static inline void f2fs_copy_page(struct page *src, struct page *dst)
1245{
1246 char *src_kaddr = kmap(src);
1247 char *dst_kaddr = kmap(dst);
1248
1249 memcpy(dst_kaddr, src_kaddr, PAGE_SIZE);
1250 kunmap(dst);
1251 kunmap(src);
1252}
1253
39a53e0c
JK
1254static inline void f2fs_put_page(struct page *page, int unlock)
1255{
031fa8cc 1256 if (!page)
39a53e0c
JK
1257 return;
1258
1259 if (unlock) {
9850cf4a 1260 f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
39a53e0c
JK
1261 unlock_page(page);
1262 }
1263 page_cache_release(page);
1264}
1265
1266static inline void f2fs_put_dnode(struct dnode_of_data *dn)
1267{
1268 if (dn->node_page)
1269 f2fs_put_page(dn->node_page, 1);
1270 if (dn->inode_page && dn->node_page != dn->inode_page)
1271 f2fs_put_page(dn->inode_page, 0);
1272 dn->node_page = NULL;
1273 dn->inode_page = NULL;
1274}
1275
1276static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
e8512d2e 1277 size_t size)
39a53e0c 1278{
e8512d2e 1279 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
39a53e0c
JK
1280}
1281
7bd59381
GZ
1282static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
1283 gfp_t flags)
1284{
1285 void *entry;
7bd59381 1286
80c54505
JK
1287 entry = kmem_cache_alloc(cachep, flags);
1288 if (!entry)
1289 entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
7bd59381
GZ
1290 return entry;
1291}
1292
740432f8
JK
1293static inline struct bio *f2fs_bio_alloc(int npages)
1294{
1295 struct bio *bio;
1296
1297 /* No failure on bio allocation */
740432f8 1298 bio = bio_alloc(GFP_NOIO, npages);
80c54505
JK
1299 if (!bio)
1300 bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
740432f8
JK
1301 return bio;
1302}
1303
9be32d72
JK
1304static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
1305 unsigned long index, void *item)
1306{
1307 while (radix_tree_insert(root, index, item))
1308 cond_resched();
1309}
1310
39a53e0c
JK
1311#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
1312
1313static inline bool IS_INODE(struct page *page)
1314{
45590710 1315 struct f2fs_node *p = F2FS_NODE(page);
39a53e0c
JK
1316 return RAW_IS_INODE(p);
1317}
1318
1319static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
1320{
1321 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
1322}
1323
1324static inline block_t datablock_addr(struct page *node_page,
1325 unsigned int offset)
1326{
1327 struct f2fs_node *raw_node;
1328 __le32 *addr_array;
45590710 1329 raw_node = F2FS_NODE(node_page);
39a53e0c
JK
1330 addr_array = blkaddr_in_node(raw_node);
1331 return le32_to_cpu(addr_array[offset]);
1332}
1333
1334static inline int f2fs_test_bit(unsigned int nr, char *addr)
1335{
1336 int mask;
1337
1338 addr += (nr >> 3);
1339 mask = 1 << (7 - (nr & 0x07));
1340 return mask & *addr;
1341}
1342
a66cdd98
JK
1343static inline void f2fs_set_bit(unsigned int nr, char *addr)
1344{
1345 int mask;
1346
1347 addr += (nr >> 3);
1348 mask = 1 << (7 - (nr & 0x07));
1349 *addr |= mask;
1350}
1351
1352static inline void f2fs_clear_bit(unsigned int nr, char *addr)
1353{
1354 int mask;
1355
1356 addr += (nr >> 3);
1357 mask = 1 << (7 - (nr & 0x07));
1358 *addr &= ~mask;
1359}
1360
52aca074 1361static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
39a53e0c
JK
1362{
1363 int mask;
1364 int ret;
1365
1366 addr += (nr >> 3);
1367 mask = 1 << (7 - (nr & 0x07));
1368 ret = mask & *addr;
1369 *addr |= mask;
1370 return ret;
1371}
1372
52aca074 1373static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
39a53e0c
JK
1374{
1375 int mask;
1376 int ret;
1377
1378 addr += (nr >> 3);
1379 mask = 1 << (7 - (nr & 0x07));
1380 ret = mask & *addr;
1381 *addr &= ~mask;
1382 return ret;
1383}
1384
c6ac4c0e
GZ
1385static inline void f2fs_change_bit(unsigned int nr, char *addr)
1386{
1387 int mask;
1388
1389 addr += (nr >> 3);
1390 mask = 1 << (7 - (nr & 0x07));
1391 *addr ^= mask;
1392}
1393
39a53e0c
JK
1394/* used for f2fs_inode_info->flags */
1395enum {
1396 FI_NEW_INODE, /* indicate newly allocated inode */
b3783873 1397 FI_DIRTY_INODE, /* indicate inode is dirty or not */
ed57c27f 1398 FI_DIRTY_DIR, /* indicate directory has dirty pages */
39a53e0c
JK
1399 FI_INC_LINK, /* need to increment i_nlink */
1400 FI_ACL_MODE, /* indicate acl mode */
1401 FI_NO_ALLOC, /* should not allocate any blocks */
c9b63bd0 1402 FI_FREE_NID, /* free allocated nide */
699489bb 1403 FI_UPDATE_DIR, /* should update inode block for consistency */
74d0b917 1404 FI_DELAY_IPUT, /* used for the recovery */
c11abd1a 1405 FI_NO_EXTENT, /* not to use the extent cache */
444c580f 1406 FI_INLINE_XATTR, /* used for inline xattr */
1001b347 1407 FI_INLINE_DATA, /* used for inline data*/
34d67deb 1408 FI_INLINE_DENTRY, /* used for inline dentry */
fff04f90
JK
1409 FI_APPEND_WRITE, /* inode has appended data */
1410 FI_UPDATE_WRITE, /* inode has in-place-update data */
88b88a66
JK
1411 FI_NEED_IPU, /* used for ipu per file */
1412 FI_ATOMIC_FILE, /* indicate atomic file */
02a1335f 1413 FI_VOLATILE_FILE, /* indicate volatile file */
3c6c2beb 1414 FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
1e84371f 1415 FI_DROP_CACHE, /* drop dirty page cache */
b3d208f9 1416 FI_DATA_EXIST, /* indicate data exists */
510022a8 1417 FI_INLINE_DOTS, /* indicate inline dot dentries */
39a53e0c
JK
1418};
1419
1420static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
1421{
61e0f2d0
JK
1422 if (!test_bit(flag, &fi->flags))
1423 set_bit(flag, &fi->flags);
39a53e0c
JK
1424}
1425
1426static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
1427{
1428 return test_bit(flag, &fi->flags);
1429}
1430
1431static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1432{
61e0f2d0
JK
1433 if (test_bit(flag, &fi->flags))
1434 clear_bit(flag, &fi->flags);
39a53e0c
JK
1435}
1436
1437static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
1438{
1439 fi->i_acl_mode = mode;
1440 set_inode_flag(fi, FI_ACL_MODE);
1441}
1442
444c580f
JK
1443static inline void get_inline_info(struct f2fs_inode_info *fi,
1444 struct f2fs_inode *ri)
1445{
1446 if (ri->i_inline & F2FS_INLINE_XATTR)
1447 set_inode_flag(fi, FI_INLINE_XATTR);
1001b347
HL
1448 if (ri->i_inline & F2FS_INLINE_DATA)
1449 set_inode_flag(fi, FI_INLINE_DATA);
34d67deb
CY
1450 if (ri->i_inline & F2FS_INLINE_DENTRY)
1451 set_inode_flag(fi, FI_INLINE_DENTRY);
b3d208f9
JK
1452 if (ri->i_inline & F2FS_DATA_EXIST)
1453 set_inode_flag(fi, FI_DATA_EXIST);
510022a8
JK
1454 if (ri->i_inline & F2FS_INLINE_DOTS)
1455 set_inode_flag(fi, FI_INLINE_DOTS);
444c580f
JK
1456}
1457
1458static inline void set_raw_inline(struct f2fs_inode_info *fi,
1459 struct f2fs_inode *ri)
1460{
1461 ri->i_inline = 0;
1462
1463 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1464 ri->i_inline |= F2FS_INLINE_XATTR;
1001b347
HL
1465 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1466 ri->i_inline |= F2FS_INLINE_DATA;
34d67deb
CY
1467 if (is_inode_flag_set(fi, FI_INLINE_DENTRY))
1468 ri->i_inline |= F2FS_INLINE_DENTRY;
b3d208f9
JK
1469 if (is_inode_flag_set(fi, FI_DATA_EXIST))
1470 ri->i_inline |= F2FS_DATA_EXIST;
510022a8
JK
1471 if (is_inode_flag_set(fi, FI_INLINE_DOTS))
1472 ri->i_inline |= F2FS_INLINE_DOTS;
444c580f
JK
1473}
1474
987c7c31
CY
1475static inline int f2fs_has_inline_xattr(struct inode *inode)
1476{
1477 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1478}
1479
de93653f
JK
1480static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
1481{
987c7c31 1482 if (f2fs_has_inline_xattr(&fi->vfs_inode))
de93653f
JK
1483 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1484 return DEF_ADDRS_PER_INODE;
1485}
1486
65985d93
JK
1487static inline void *inline_xattr_addr(struct page *page)
1488{
695fd1ed 1489 struct f2fs_inode *ri = F2FS_INODE(page);
65985d93
JK
1490 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1491 F2FS_INLINE_XATTR_ADDRS]);
1492}
1493
1494static inline int inline_xattr_size(struct inode *inode)
1495{
987c7c31 1496 if (f2fs_has_inline_xattr(inode))
65985d93
JK
1497 return F2FS_INLINE_XATTR_ADDRS << 2;
1498 else
1499 return 0;
1500}
1501
0dbdc2ae
JK
1502static inline int f2fs_has_inline_data(struct inode *inode)
1503{
1504 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1505}
1506
b3d208f9
JK
1507static inline void f2fs_clear_inline_inode(struct inode *inode)
1508{
1509 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
1510 clear_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
1511}
1512
1513static inline int f2fs_exist_data(struct inode *inode)
1514{
1515 return is_inode_flag_set(F2FS_I(inode), FI_DATA_EXIST);
1516}
1517
510022a8
JK
1518static inline int f2fs_has_inline_dots(struct inode *inode)
1519{
1520 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DOTS);
1521}
1522
88b88a66
JK
1523static inline bool f2fs_is_atomic_file(struct inode *inode)
1524{
1525 return is_inode_flag_set(F2FS_I(inode), FI_ATOMIC_FILE);
1526}
1527
02a1335f
JK
1528static inline bool f2fs_is_volatile_file(struct inode *inode)
1529{
1530 return is_inode_flag_set(F2FS_I(inode), FI_VOLATILE_FILE);
1531}
1532
3c6c2beb
JK
1533static inline bool f2fs_is_first_block_written(struct inode *inode)
1534{
1535 return is_inode_flag_set(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
1536}
1537
1e84371f
JK
1538static inline bool f2fs_is_drop_cache(struct inode *inode)
1539{
1540 return is_inode_flag_set(F2FS_I(inode), FI_DROP_CACHE);
1541}
1542
1001b347
HL
1543static inline void *inline_data_addr(struct page *page)
1544{
695fd1ed 1545 struct f2fs_inode *ri = F2FS_INODE(page);
1001b347
HL
1546 return (void *)&(ri->i_addr[1]);
1547}
1548
34d67deb
CY
1549static inline int f2fs_has_inline_dentry(struct inode *inode)
1550{
1551 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DENTRY);
1552}
1553
9486ba44
JK
1554static inline void f2fs_dentry_kunmap(struct inode *dir, struct page *page)
1555{
1556 if (!f2fs_has_inline_dentry(dir))
1557 kunmap(page);
1558}
1559
b5492af7
JK
1560static inline int is_file(struct inode *inode, int type)
1561{
1562 return F2FS_I(inode)->i_advise & type;
1563}
1564
1565static inline void set_file(struct inode *inode, int type)
1566{
1567 F2FS_I(inode)->i_advise |= type;
1568}
1569
1570static inline void clear_file(struct inode *inode, int type)
1571{
1572 F2FS_I(inode)->i_advise &= ~type;
1573}
1574
77888c1e
JK
1575static inline int f2fs_readonly(struct super_block *sb)
1576{
1577 return sb->s_flags & MS_RDONLY;
1578}
1579
1e968fdf
JK
1580static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
1581{
1582 return is_set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1583}
1584
744602cf
JK
1585static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1586{
1587 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1588 sbi->sb->s_flags |= MS_RDONLY;
1589}
1590
eaa693f4
JK
1591static inline bool is_dot_dotdot(const struct qstr *str)
1592{
1593 if (str->len == 1 && str->name[0] == '.')
1594 return true;
1595
1596 if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
1597 return true;
1598
1599 return false;
1600}
1601
3e72f721
JK
1602static inline bool f2fs_may_extent_tree(struct inode *inode)
1603{
1604 mode_t mode = inode->i_mode;
1605
1606 if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE) ||
1607 is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT))
1608 return false;
1609
1610 return S_ISREG(mode);
1611}
1612
39307a8e
JK
1613static inline void *f2fs_kvmalloc(size_t size, gfp_t flags)
1614{
1615 void *ret;
1616
1617 ret = kmalloc(size, flags | __GFP_NOWARN);
1618 if (!ret)
1619 ret = __vmalloc(size, flags, PAGE_KERNEL);
1620 return ret;
1621}
1622
1623static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
1624{
1625 void *ret;
1626
1627 ret = kzalloc(size, flags | __GFP_NOWARN);
1628 if (!ret)
1629 ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
1630 return ret;
1631}
1632
a6dda0e6
CH
1633#define get_inode_mode(i) \
1634 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1635 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1636
267378d4
CY
1637/* get offset of first page in next direct node */
1638#define PGOFS_OF_NEXT_DNODE(pgofs, fi) \
1639 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \
1640 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \
1641 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi))
1642
39a53e0c
JK
1643/*
1644 * file.c
1645 */
1646int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1647void truncate_data_blocks(struct dnode_of_data *);
764aa3e9 1648int truncate_blocks(struct inode *, u64, bool);
b0154891 1649int f2fs_truncate(struct inode *, bool);
2d4d9fb5 1650int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
39a53e0c
JK
1651int f2fs_setattr(struct dentry *, struct iattr *);
1652int truncate_hole(struct inode *, pgoff_t, pgoff_t);
b292dcab 1653int truncate_data_blocks_range(struct dnode_of_data *, int);
39a53e0c 1654long f2fs_ioctl(struct file *, unsigned int, unsigned long);
e9750824 1655long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
39a53e0c
JK
1656
1657/*
1658 * inode.c
1659 */
1660void f2fs_set_inode_flags(struct inode *);
39a53e0c 1661struct inode *f2fs_iget(struct super_block *, unsigned long);
4660f9c0 1662int try_to_free_nats(struct f2fs_sb_info *, int);
39a53e0c 1663void update_inode(struct inode *, struct page *);
744602cf 1664void update_inode_page(struct inode *);
39a53e0c
JK
1665int f2fs_write_inode(struct inode *, struct writeback_control *);
1666void f2fs_evict_inode(struct inode *);
44c16156 1667void handle_failed_inode(struct inode *);
39a53e0c
JK
1668
1669/*
1670 * namei.c
1671 */
1672struct dentry *f2fs_get_parent(struct dentry *child);
1673
1674/*
1675 * dir.c
1676 */
dbeacf02 1677extern unsigned char f2fs_filetype_table[F2FS_FT_MAX];
510022a8 1678void set_de_type(struct f2fs_dir_entry *, umode_t);
6e22c691
JK
1679
1680struct f2fs_dir_entry *find_target_dentry(struct f2fs_filename *,
1681 f2fs_hash_t, int *, struct f2fs_dentry_ptr *);
7b3cd7d6 1682bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *,
d8c6822a 1683 unsigned int, struct f2fs_str *);
062a3e7b
JK
1684void do_make_empty_dir(struct inode *, struct inode *,
1685 struct f2fs_dentry_ptr *);
dbeacf02 1686struct page *init_inode_metadata(struct inode *, struct inode *,
bce8d112 1687 const struct qstr *, struct page *);
dbeacf02 1688void update_parent_metadata(struct inode *, struct inode *, unsigned int);
a82afa20 1689int room_for_filename(const void *, int, int);
dbeacf02 1690void f2fs_drop_nlink(struct inode *, struct inode *, struct page *);
39a53e0c
JK
1691struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1692 struct page **);
1693struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1694ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1695void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1696 struct page *, struct inode *);
e7d55452 1697int update_dent_inode(struct inode *, struct inode *, const struct qstr *);
510022a8 1698void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *,
3b4d732a 1699 const struct qstr *, f2fs_hash_t , unsigned int);
510022a8
JK
1700int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *, nid_t,
1701 umode_t);
dbeacf02
CY
1702void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *,
1703 struct inode *);
b97a9b5d 1704int f2fs_do_tmpfile(struct inode *, struct inode *);
39a53e0c
JK
1705bool f2fs_empty_dir(struct inode *);
1706
b7f7a5e0
AV
1707static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1708{
2b0143b5 1709 return __f2fs_add_link(d_inode(dentry->d_parent), &dentry->d_name,
510022a8 1710 inode, inode->i_ino, inode->i_mode);
b7f7a5e0
AV
1711}
1712
39a53e0c
JK
1713/*
1714 * super.c
1715 */
c5bda1c8 1716int f2fs_commit_super(struct f2fs_sb_info *, bool);
39a53e0c 1717int f2fs_sync_fs(struct super_block *, int);
a07ef784
NJ
1718extern __printf(3, 4)
1719void f2fs_msg(struct super_block *, const char *, const char *, ...);
39a53e0c
JK
1720
1721/*
1722 * hash.c
1723 */
eee6160f 1724f2fs_hash_t f2fs_dentry_hash(const struct qstr *);
39a53e0c
JK
1725
1726/*
1727 * node.c
1728 */
1729struct dnode_of_data;
1730struct node_info;
1731
6fb03f3a 1732bool available_free_memory(struct f2fs_sb_info *, int);
2dcf51ab 1733int need_dentry_mark(struct f2fs_sb_info *, nid_t);
88bd02c9 1734bool is_checkpointed_node(struct f2fs_sb_info *, nid_t);
88bd02c9 1735bool need_inode_block_update(struct f2fs_sb_info *, nid_t);
39a53e0c
JK
1736void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1737int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1738int truncate_inode_blocks(struct inode *, pgoff_t);
4f16fb0f 1739int truncate_xattr_node(struct inode *, struct page *);
cfe58f9d 1740int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
13ec7297 1741int remove_inode_page(struct inode *);
a014e037 1742struct page *new_inode_page(struct inode *);
8ae8f162 1743struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
39a53e0c
JK
1744void ra_node_page(struct f2fs_sb_info *, nid_t);
1745struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1746struct page *get_node_page_ra(struct page *, int);
1747void sync_inode_page(struct dnode_of_data *);
1748int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1749bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1750void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1751void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
31696580 1752int try_to_free_nids(struct f2fs_sb_info *, int);
70cfed88 1753void recover_inline_xattr(struct inode *, struct page *);
1c35a90e 1754void recover_xattr_data(struct inode *, struct page *, block_t);
39a53e0c
JK
1755int recover_inode_page(struct f2fs_sb_info *, struct page *);
1756int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1757 struct f2fs_summary_block *);
1758void flush_nat_entries(struct f2fs_sb_info *);
1759int build_node_manager(struct f2fs_sb_info *);
1760void destroy_node_manager(struct f2fs_sb_info *);
6e6093a8 1761int __init create_node_manager_caches(void);
39a53e0c
JK
1762void destroy_node_manager_caches(void);
1763
1764/*
1765 * segment.c
1766 */
88b88a66 1767void register_inmem_page(struct inode *, struct page *);
edb27dee 1768int commit_inmem_pages(struct inode *, bool);
39a53e0c 1769void f2fs_balance_fs(struct f2fs_sb_info *);
4660f9c0 1770void f2fs_balance_fs_bg(struct f2fs_sb_info *);
6b4afdd7 1771int f2fs_issue_flush(struct f2fs_sb_info *);
2163d198
GZ
1772int create_flush_cmd_control(struct f2fs_sb_info *);
1773void destroy_flush_cmd_control(struct f2fs_sb_info *);
39a53e0c 1774void invalidate_blocks(struct f2fs_sb_info *, block_t);
6e2c64ad 1775bool is_checkpointed_data(struct f2fs_sb_info *, block_t);
5e443818 1776void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
836b5a63 1777void clear_prefree_segments(struct f2fs_sb_info *, struct cp_control *);
4b2fecc8 1778void release_discard_addrs(struct f2fs_sb_info *);
e90c2d28 1779bool discard_next_dnode(struct f2fs_sb_info *, block_t);
3fa06d7b 1780int npages_for_summary_flush(struct f2fs_sb_info *, bool);
39a53e0c 1781void allocate_new_segments(struct f2fs_sb_info *);
4b2fecc8 1782int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *);
39a53e0c 1783struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
381722d2 1784void update_meta_page(struct f2fs_sb_info *, void *, block_t);
577e3495 1785void write_meta_page(struct f2fs_sb_info *, struct page *);
05ca3632
JK
1786void write_node_page(unsigned int, struct f2fs_io_info *);
1787void write_data_page(struct dnode_of_data *, struct f2fs_io_info *);
1788void rewrite_data_page(struct f2fs_io_info *);
528e3459
CY
1789void f2fs_replace_block(struct f2fs_sb_info *, struct dnode_of_data *,
1790 block_t, block_t, unsigned char, bool);
bfad7c2d
JK
1791void allocate_data_block(struct f2fs_sb_info *, struct page *,
1792 block_t, block_t *, struct f2fs_summary *, int);
5514f0aa 1793void f2fs_wait_on_page_writeback(struct page *, enum page_type);
39a53e0c
JK
1794void write_data_summaries(struct f2fs_sb_info *, block_t);
1795void write_node_summaries(struct f2fs_sb_info *, block_t);
1796int lookup_journal_in_cursum(struct f2fs_summary_block *,
1797 int, unsigned int, int);
4b2fecc8 1798void flush_sit_entries(struct f2fs_sb_info *, struct cp_control *);
39a53e0c 1799int build_segment_manager(struct f2fs_sb_info *);
39a53e0c 1800void destroy_segment_manager(struct f2fs_sb_info *);
7fd9e544
JK
1801int __init create_segment_manager_caches(void);
1802void destroy_segment_manager_caches(void);
39a53e0c
JK
1803
1804/*
1805 * checkpoint.c
1806 */
1807struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1808struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
f0c9cada 1809bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
4c521f49 1810int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int);
635aee1f 1811void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
39a53e0c 1812long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
fff04f90
JK
1813void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
1814void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
6f12ac25 1815void release_dirty_inode(struct f2fs_sb_info *);
fff04f90 1816bool exist_written_data(struct f2fs_sb_info *, nid_t, int);
cbd56e7d
JK
1817int acquire_orphan_inode(struct f2fs_sb_info *);
1818void release_orphan_inode(struct f2fs_sb_info *);
39a53e0c
JK
1819void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1820void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
8c14bfad 1821int recover_orphan_inodes(struct f2fs_sb_info *);
39a53e0c 1822int get_valid_checkpoint(struct f2fs_sb_info *);
a7ffdbe2 1823void update_dirty_page(struct inode *, struct page *);
5deb8267 1824void add_dirty_dir_inode(struct inode *);
39a53e0c
JK
1825void remove_dirty_dir_inode(struct inode *);
1826void sync_dirty_dir_inodes(struct f2fs_sb_info *);
75ab4cb8 1827void write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
6451e041 1828void init_ino_entry_info(struct f2fs_sb_info *);
6e6093a8 1829int __init create_checkpoint_caches(void);
39a53e0c
JK
1830void destroy_checkpoint_caches(void);
1831
1832/*
1833 * data.c
1834 */
458e6197 1835void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
05ca3632
JK
1836int f2fs_submit_page_bio(struct f2fs_io_info *);
1837void f2fs_submit_page_mbio(struct f2fs_io_info *);
216a620a 1838void set_data_blkaddr(struct dnode_of_data *);
39a53e0c 1839int reserve_new_block(struct dnode_of_data *);
759af1c9 1840int f2fs_get_block(struct dnode_of_data *, pgoff_t);
b600965c 1841int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
a56c7c6f 1842struct page *get_read_data_page(struct inode *, pgoff_t, int, bool);
43f3eae1 1843struct page *find_data_page(struct inode *, pgoff_t);
a56c7c6f 1844struct page *get_lock_data_page(struct inode *, pgoff_t, bool);
64aa7ed9 1845struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
05ca3632 1846int do_write_data_page(struct f2fs_io_info *);
9ab70134 1847int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
487261f3
CY
1848void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
1849int f2fs_release_page(struct page *, gfp_t);
39a53e0c
JK
1850
1851/*
1852 * gc.c
1853 */
1854int start_gc_thread(struct f2fs_sb_info *);
1855void stop_gc_thread(struct f2fs_sb_info *);
de93653f 1856block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
d530d4d8 1857int f2fs_gc(struct f2fs_sb_info *, bool);
39a53e0c 1858void build_gc_manager(struct f2fs_sb_info *);
39a53e0c
JK
1859
1860/*
1861 * recovery.c
1862 */
6ead1142 1863int recover_fsync_data(struct f2fs_sb_info *);
39a53e0c
JK
1864bool space_for_roll_forward(struct f2fs_sb_info *);
1865
1866/*
1867 * debug.c
1868 */
1869#ifdef CONFIG_F2FS_STAT_FS
1870struct f2fs_stat_info {
1871 struct list_head stat_list;
1872 struct f2fs_sb_info *sbi;
39a53e0c
JK
1873 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1874 int main_area_segs, main_area_sections, main_area_zones;
5b7ee374
CY
1875 unsigned long long hit_largest, hit_cached, hit_rbtree;
1876 unsigned long long hit_total, total_ext;
029e13cc 1877 int ext_tree, ext_node;
39a53e0c 1878 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
dd4e4b59 1879 int nats, dirty_nats, sits, dirty_sits, fnids;
39a53e0c 1880 int total_count, utilization;
d5e8f6c9
CY
1881 int bg_gc, inmem_pages, wb_pages;
1882 int inline_xattr, inline_inode, inline_dir;
39a53e0c
JK
1883 unsigned int valid_count, valid_node_count, valid_inode_count;
1884 unsigned int bimodal, avg_vblocks;
1885 int util_free, util_valid, util_invalid;
1886 int rsvd_segs, overp_segs;
1887 int dirty_count, node_pages, meta_pages;
942e0be6 1888 int prefree_count, call_count, cp_count;
39a53e0c 1889 int tot_segs, node_segs, data_segs, free_segs, free_secs;
e1235983 1890 int bg_node_segs, bg_data_segs;
39a53e0c 1891 int tot_blks, data_blks, node_blks;
e1235983 1892 int bg_data_blks, bg_node_blks;
39a53e0c
JK
1893 int curseg[NR_CURSEG_TYPE];
1894 int cursec[NR_CURSEG_TYPE];
1895 int curzone[NR_CURSEG_TYPE];
1896
1897 unsigned int segment_count[2];
1898 unsigned int block_count[2];
b9a2c252 1899 unsigned int inplace_count;
9edcdabf 1900 unsigned long long base_mem, cache_mem, page_mem;
39a53e0c
JK
1901};
1902
963d4f7d
GZ
1903static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1904{
6c311ec6 1905 return (struct f2fs_stat_info *)sbi->stat_info;
963d4f7d
GZ
1906}
1907
942e0be6 1908#define stat_inc_cp_count(si) ((si)->cp_count++)
dcdfff65
JK
1909#define stat_inc_call_count(si) ((si)->call_count++)
1910#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1911#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1912#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
5b7ee374
CY
1913#define stat_inc_total_hit(sbi) (atomic64_inc(&(sbi)->total_hit_ext))
1914#define stat_inc_rbtree_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_rbtree))
1915#define stat_inc_largest_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_largest))
1916#define stat_inc_cached_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_cached))
d5e8f6c9
CY
1917#define stat_inc_inline_xattr(inode) \
1918 do { \
1919 if (f2fs_has_inline_xattr(inode)) \
1920 (atomic_inc(&F2FS_I_SB(inode)->inline_xattr)); \
1921 } while (0)
1922#define stat_dec_inline_xattr(inode) \
1923 do { \
1924 if (f2fs_has_inline_xattr(inode)) \
1925 (atomic_dec(&F2FS_I_SB(inode)->inline_xattr)); \
1926 } while (0)
0dbdc2ae
JK
1927#define stat_inc_inline_inode(inode) \
1928 do { \
1929 if (f2fs_has_inline_data(inode)) \
03e14d52 1930 (atomic_inc(&F2FS_I_SB(inode)->inline_inode)); \
0dbdc2ae
JK
1931 } while (0)
1932#define stat_dec_inline_inode(inode) \
1933 do { \
1934 if (f2fs_has_inline_data(inode)) \
03e14d52 1935 (atomic_dec(&F2FS_I_SB(inode)->inline_inode)); \
0dbdc2ae 1936 } while (0)
3289c061
JK
1937#define stat_inc_inline_dir(inode) \
1938 do { \
1939 if (f2fs_has_inline_dentry(inode)) \
03e14d52 1940 (atomic_inc(&F2FS_I_SB(inode)->inline_dir)); \
3289c061
JK
1941 } while (0)
1942#define stat_dec_inline_dir(inode) \
1943 do { \
1944 if (f2fs_has_inline_dentry(inode)) \
03e14d52 1945 (atomic_dec(&F2FS_I_SB(inode)->inline_dir)); \
3289c061 1946 } while (0)
dcdfff65
JK
1947#define stat_inc_seg_type(sbi, curseg) \
1948 ((sbi)->segment_count[(curseg)->alloc_type]++)
1949#define stat_inc_block_count(sbi, curseg) \
1950 ((sbi)->block_count[(curseg)->alloc_type]++)
b9a2c252
CL
1951#define stat_inc_inplace_blocks(sbi) \
1952 (atomic_inc(&(sbi)->inplace_count))
e1235983 1953#define stat_inc_seg_count(sbi, type, gc_type) \
39a53e0c 1954 do { \
963d4f7d 1955 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c 1956 (si)->tot_segs++; \
e1235983 1957 if (type == SUM_TYPE_DATA) { \
39a53e0c 1958 si->data_segs++; \
e1235983
CL
1959 si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0; \
1960 } else { \
39a53e0c 1961 si->node_segs++; \
e1235983
CL
1962 si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0; \
1963 } \
39a53e0c
JK
1964 } while (0)
1965
1966#define stat_inc_tot_blk_count(si, blks) \
1967 (si->tot_blks += (blks))
1968
e1235983 1969#define stat_inc_data_blk_count(sbi, blks, gc_type) \
39a53e0c 1970 do { \
963d4f7d 1971 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK
1972 stat_inc_tot_blk_count(si, blks); \
1973 si->data_blks += (blks); \
e1235983 1974 si->bg_data_blks += (gc_type == BG_GC) ? (blks) : 0; \
39a53e0c
JK
1975 } while (0)
1976
e1235983 1977#define stat_inc_node_blk_count(sbi, blks, gc_type) \
39a53e0c 1978 do { \
963d4f7d 1979 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK
1980 stat_inc_tot_blk_count(si, blks); \
1981 si->node_blks += (blks); \
e1235983 1982 si->bg_node_blks += (gc_type == BG_GC) ? (blks) : 0; \
39a53e0c
JK
1983 } while (0)
1984
1985int f2fs_build_stats(struct f2fs_sb_info *);
1986void f2fs_destroy_stats(struct f2fs_sb_info *);
6e6093a8 1987void __init f2fs_create_root_stats(void);
4589d25d 1988void f2fs_destroy_root_stats(void);
39a53e0c 1989#else
942e0be6 1990#define stat_inc_cp_count(si)
39a53e0c 1991#define stat_inc_call_count(si)
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1992#define stat_inc_bggc_count(si)
1993#define stat_inc_dirty_dir(sbi)
1994#define stat_dec_dirty_dir(sbi)
1995#define stat_inc_total_hit(sb)
029e13cc 1996#define stat_inc_rbtree_node_hit(sb)
91c481ff
CY
1997#define stat_inc_largest_node_hit(sbi)
1998#define stat_inc_cached_node_hit(sbi)
d5e8f6c9
CY
1999#define stat_inc_inline_xattr(inode)
2000#define stat_dec_inline_xattr(inode)
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2001#define stat_inc_inline_inode(inode)
2002#define stat_dec_inline_inode(inode)
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2003#define stat_inc_inline_dir(inode)
2004#define stat_dec_inline_dir(inode)
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2005#define stat_inc_seg_type(sbi, curseg)
2006#define stat_inc_block_count(sbi, curseg)
b9a2c252 2007#define stat_inc_inplace_blocks(sbi)
e1235983 2008#define stat_inc_seg_count(sbi, type, gc_type)
39a53e0c 2009#define stat_inc_tot_blk_count(si, blks)
e1235983
CL
2010#define stat_inc_data_blk_count(sbi, blks, gc_type)
2011#define stat_inc_node_blk_count(sbi, blks, gc_type)
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2012
2013static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
2014static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
6e6093a8 2015static inline void __init f2fs_create_root_stats(void) { }
4589d25d 2016static inline void f2fs_destroy_root_stats(void) { }
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2017#endif
2018
2019extern const struct file_operations f2fs_dir_operations;
2020extern const struct file_operations f2fs_file_operations;
2021extern const struct inode_operations f2fs_file_inode_operations;
2022extern const struct address_space_operations f2fs_dblock_aops;
2023extern const struct address_space_operations f2fs_node_aops;
2024extern const struct address_space_operations f2fs_meta_aops;
2025extern const struct inode_operations f2fs_dir_inode_operations;
2026extern const struct inode_operations f2fs_symlink_inode_operations;
cbaf042a 2027extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
39a53e0c 2028extern const struct inode_operations f2fs_special_inode_operations;
29e7043f 2029extern struct kmem_cache *inode_entry_slab;
1001b347 2030
e18c65b2
HL
2031/*
2032 * inline.c
2033 */
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JK
2034bool f2fs_may_inline_data(struct inode *);
2035bool f2fs_may_inline_dentry(struct inode *);
b3d208f9 2036void read_inline_data(struct page *, struct page *);
0bfcfcca 2037bool truncate_inline_inode(struct page *, u64);
e18c65b2 2038int f2fs_read_inline_data(struct inode *, struct page *);
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JK
2039int f2fs_convert_inline_page(struct dnode_of_data *, struct page *);
2040int f2fs_convert_inline_inode(struct inode *);
2041int f2fs_write_inline_data(struct inode *, struct page *);
0342fd30 2042bool recover_inline_data(struct inode *, struct page *);
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2043struct f2fs_dir_entry *find_in_inline_dir(struct inode *,
2044 struct f2fs_filename *, struct page **);
201a05be
CY
2045struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *, struct page **);
2046int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *);
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JK
2047int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *,
2048 nid_t, umode_t);
201a05be
CY
2049void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *,
2050 struct inode *, struct inode *);
2051bool f2fs_empty_inline_dir(struct inode *);
d8c6822a
JK
2052int f2fs_read_inline_dir(struct file *, struct dir_context *,
2053 struct f2fs_str *);
cde4de12 2054
2658e50d
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2055/*
2056 * shrinker.c
2057 */
2058unsigned long f2fs_shrink_count(struct shrinker *, struct shrink_control *);
2059unsigned long f2fs_shrink_scan(struct shrinker *, struct shrink_control *);
2060void f2fs_join_shrinker(struct f2fs_sb_info *);
2061void f2fs_leave_shrinker(struct f2fs_sb_info *);
2062
a28ef1f5
CY
2063/*
2064 * extent_cache.c
2065 */
2066unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
2067void f2fs_drop_largest_extent(struct inode *, pgoff_t);
2068void f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
2069unsigned int f2fs_destroy_extent_node(struct inode *);
2070void f2fs_destroy_extent_tree(struct inode *);
2071bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *);
2072void f2fs_update_extent_cache(struct dnode_of_data *);
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CY
2073void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
2074 pgoff_t, block_t, unsigned int);
a28ef1f5
CY
2075void init_extent_cache_info(struct f2fs_sb_info *);
2076int __init create_extent_cache(void);
2077void destroy_extent_cache(void);
2078
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2079/*
2080 * crypto support
2081 */
2082static inline int f2fs_encrypted_inode(struct inode *inode)
2083{
2084#ifdef CONFIG_F2FS_FS_ENCRYPTION
2085 return file_is_encrypt(inode);
2086#else
2087 return 0;
2088#endif
2089}
2090
2091static inline void f2fs_set_encrypted_inode(struct inode *inode)
2092{
2093#ifdef CONFIG_F2FS_FS_ENCRYPTION
2094 file_set_encrypt(inode);
2095#endif
2096}
2097
2098static inline bool f2fs_bio_encrypted(struct bio *bio)
2099{
2100#ifdef CONFIG_F2FS_FS_ENCRYPTION
2101 return unlikely(bio->bi_private != NULL);
2102#else
2103 return false;
2104#endif
2105}
2106
2107static inline int f2fs_sb_has_crypto(struct super_block *sb)
2108{
2109#ifdef CONFIG_F2FS_FS_ENCRYPTION
2110 return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT);
2111#else
2112 return 0;
2113#endif
2114}
f424f664 2115
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2116static inline bool f2fs_may_encrypt(struct inode *inode)
2117{
2118#ifdef CONFIG_F2FS_FS_ENCRYPTION
2119 mode_t mode = inode->i_mode;
2120
2121 return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
2122#else
2123 return 0;
2124#endif
2125}
2126
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2127/* crypto_policy.c */
2128int f2fs_is_child_context_consistent_with_parent(struct inode *,
2129 struct inode *);
2130int f2fs_inherit_context(struct inode *, struct inode *, struct page *);
2131int f2fs_process_policy(const struct f2fs_encryption_policy *, struct inode *);
2132int f2fs_get_policy(struct inode *, struct f2fs_encryption_policy *);
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2133
2134/* crypt.c */
8bacf6de 2135extern struct kmem_cache *f2fs_crypt_info_cachep;
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2136bool f2fs_valid_contents_enc_mode(uint32_t);
2137uint32_t f2fs_validate_encryption_key_size(uint32_t, uint32_t);
2138struct f2fs_crypto_ctx *f2fs_get_crypto_ctx(struct inode *);
2139void f2fs_release_crypto_ctx(struct f2fs_crypto_ctx *);
2140struct page *f2fs_encrypt(struct inode *, struct page *);
2141int f2fs_decrypt(struct f2fs_crypto_ctx *, struct page *);
2142int f2fs_decrypt_one(struct inode *, struct page *);
2143void f2fs_end_io_crypto_work(struct f2fs_crypto_ctx *, struct bio *);
2144
0adda907 2145/* crypto_key.c */
26bf3dc7 2146void f2fs_free_encryption_info(struct inode *, struct f2fs_crypt_info *);
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2147int _f2fs_get_encryption_info(struct inode *inode);
2148
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2149/* crypto_fname.c */
2150bool f2fs_valid_filenames_enc_mode(uint32_t);
2151u32 f2fs_fname_crypto_round_up(u32, u32);
2152int f2fs_fname_crypto_alloc_buffer(struct inode *, u32, struct f2fs_str *);
2153int f2fs_fname_disk_to_usr(struct inode *, f2fs_hash_t *,
2154 const struct f2fs_str *, struct f2fs_str *);
2155int f2fs_fname_usr_to_disk(struct inode *, const struct qstr *,
2156 struct f2fs_str *);
2157
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2158#ifdef CONFIG_F2FS_FS_ENCRYPTION
2159void f2fs_restore_and_release_control_page(struct page **);
2160void f2fs_restore_control_page(struct page *);
2161
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2162int __init f2fs_init_crypto(void);
2163int f2fs_crypto_initialize(void);
57e5055b 2164void f2fs_exit_crypto(void);
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2165
2166int f2fs_has_encryption_key(struct inode *);
2167
2168static inline int f2fs_get_encryption_info(struct inode *inode)
2169{
2170 struct f2fs_crypt_info *ci = F2FS_I(inode)->i_crypt_info;
2171
2172 if (!ci ||
2173 (ci->ci_keyring_key &&
2174 (ci->ci_keyring_key->flags & ((1 << KEY_FLAG_INVALIDATED) |
2175 (1 << KEY_FLAG_REVOKED) |
2176 (1 << KEY_FLAG_DEAD)))))
2177 return _f2fs_get_encryption_info(inode);
2178 return 0;
2179}
6b3bd08f 2180
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2181void f2fs_fname_crypto_free_buffer(struct f2fs_str *);
2182int f2fs_fname_setup_filename(struct inode *, const struct qstr *,
2183 int lookup, struct f2fs_filename *);
2184void f2fs_fname_free_filename(struct f2fs_filename *);
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2185#else
2186static inline void f2fs_restore_and_release_control_page(struct page **p) { }
2187static inline void f2fs_restore_control_page(struct page *p) { }
2188
cfc4d971 2189static inline int __init f2fs_init_crypto(void) { return 0; }
57e5055b 2190static inline void f2fs_exit_crypto(void) { }
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2191
2192static inline int f2fs_has_encryption_key(struct inode *i) { return 0; }
2193static inline int f2fs_get_encryption_info(struct inode *i) { return 0; }
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2194static inline void f2fs_fname_crypto_free_buffer(struct f2fs_str *p) { }
2195
2196static inline int f2fs_fname_setup_filename(struct inode *dir,
2197 const struct qstr *iname,
2198 int lookup, struct f2fs_filename *fname)
2199{
2200 memset(fname, 0, sizeof(struct f2fs_filename));
2201 fname->usr_fname = iname;
2202 fname->disk_name.name = (unsigned char *)iname->name;
2203 fname->disk_name.len = iname->len;
2204 return 0;
2205}
2206
2207static inline void f2fs_fname_free_filename(struct f2fs_filename *fname) { }
57e5055b 2208#endif
39a53e0c 2209#endif