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f2fs crypto: fix racing of accessing encrypted page among
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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 */
ea1a29a0 513 unsigned int ra_nid_pages; /* # of nid pages to be readaheaded */
39a53e0c
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514
515 /* NAT cache management */
516 struct radix_tree_root nat_root;/* root of the nat entry cache */
309cc2b6 517 struct radix_tree_root nat_set_root;/* root of the nat set cache */
8b26ef98 518 struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
39a53e0c 519 struct list_head nat_entries; /* cached nat entry list (clean) */
309cc2b6 520 unsigned int nat_cnt; /* the # of cached nat entries */
aec71382 521 unsigned int dirty_nat_cnt; /* total num of nat entries in set */
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522
523 /* free node ids management */
8a7ed66a 524 struct radix_tree_root free_nid_root;/* root of the free_nid cache */
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525 struct list_head free_nid_list; /* a list for free nids */
526 spinlock_t free_nid_list_lock; /* protect free nid list */
527 unsigned int fcnt; /* the number of free node id */
528 struct mutex build_lock; /* lock for build free nids */
529
530 /* for checkpoint */
531 char *nat_bitmap; /* NAT bitmap pointer */
532 int bitmap_size; /* bitmap size */
533};
534
535/*
536 * this structure is used as one of function parameters.
537 * all the information are dedicated to a given direct node block determined
538 * by the data offset in a file.
539 */
540struct dnode_of_data {
541 struct inode *inode; /* vfs inode pointer */
542 struct page *inode_page; /* its inode page, NULL is possible */
543 struct page *node_page; /* cached direct node page */
544 nid_t nid; /* node id of the direct node block */
545 unsigned int ofs_in_node; /* data offset in the node page */
546 bool inode_page_locked; /* inode page is locked or not */
547 block_t data_blkaddr; /* block address of the node block */
548};
549
550static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
551 struct page *ipage, struct page *npage, nid_t nid)
552{
d66d1f76 553 memset(dn, 0, sizeof(*dn));
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554 dn->inode = inode;
555 dn->inode_page = ipage;
556 dn->node_page = npage;
557 dn->nid = nid;
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558}
559
560/*
561 * For SIT manager
562 *
563 * By default, there are 6 active log areas across the whole main area.
564 * When considering hot and cold data separation to reduce cleaning overhead,
565 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
566 * respectively.
567 * In the current design, you should not change the numbers intentionally.
568 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
569 * logs individually according to the underlying devices. (default: 6)
570 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
571 * data and 8 for node logs.
572 */
573#define NR_CURSEG_DATA_TYPE (3)
574#define NR_CURSEG_NODE_TYPE (3)
575#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
576
577enum {
578 CURSEG_HOT_DATA = 0, /* directory entry blocks */
579 CURSEG_WARM_DATA, /* data blocks */
580 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
581 CURSEG_HOT_NODE, /* direct node blocks of directory files */
582 CURSEG_WARM_NODE, /* direct node blocks of normal files */
583 CURSEG_COLD_NODE, /* indirect node blocks */
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584 NO_CHECK_TYPE,
585 CURSEG_DIRECT_IO, /* to use for the direct IO path */
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586};
587
6b4afdd7 588struct flush_cmd {
6b4afdd7 589 struct completion wait;
721bd4d5 590 struct llist_node llnode;
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591 int ret;
592};
593
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594struct flush_cmd_control {
595 struct task_struct *f2fs_issue_flush; /* flush thread */
596 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
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597 struct llist_head issue_list; /* list for command issue */
598 struct llist_node *dispatch_list; /* list for command dispatch */
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599};
600
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601struct f2fs_sm_info {
602 struct sit_info *sit_info; /* whole segment information */
603 struct free_segmap_info *free_info; /* free segment information */
604 struct dirty_seglist_info *dirty_info; /* dirty segment information */
605 struct curseg_info *curseg_array; /* active segment information */
606
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607 block_t seg0_blkaddr; /* block address of 0'th segment */
608 block_t main_blkaddr; /* start block address of main area */
609 block_t ssa_blkaddr; /* start block address of SSA area */
610
611 unsigned int segment_count; /* total # of segments */
612 unsigned int main_segments; /* # of segments in main area */
613 unsigned int reserved_segments; /* # of reserved segments */
614 unsigned int ovp_segments; /* # of overprovision segments */
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615
616 /* a threshold to reclaim prefree segments */
617 unsigned int rec_prefree_segments;
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618
619 /* for small discard management */
620 struct list_head discard_list; /* 4KB discard list */
621 int nr_discards; /* # of discards in the list */
622 int max_discards; /* max. discards to be issued */
216fbd64 623
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624 /* for batched trimming */
625 unsigned int trim_sections; /* # of sections to trim */
626
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627 struct list_head sit_entry_set; /* sit entry set list */
628
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629 unsigned int ipu_policy; /* in-place-update policy */
630 unsigned int min_ipu_util; /* in-place-update threshold */
c1ce1b02 631 unsigned int min_fsync_blocks; /* threshold for fsync */
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632
633 /* for flush command control */
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634 struct flush_cmd_control *cmd_control_info;
635
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636};
637
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638/*
639 * For superblock
640 */
641/*
642 * COUNT_TYPE for monitoring
643 *
644 * f2fs monitors the number of several block types such as on-writeback,
645 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
646 */
647enum count_type {
648 F2FS_WRITEBACK,
649 F2FS_DIRTY_DENTS,
650 F2FS_DIRTY_NODES,
651 F2FS_DIRTY_META,
8dcf2ff7 652 F2FS_INMEM_PAGES,
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653 NR_COUNT_TYPE,
654};
655
39a53e0c 656/*
e1c42045 657 * The below are the page types of bios used in submit_bio().
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658 * The available types are:
659 * DATA User data pages. It operates as async mode.
660 * NODE Node pages. It operates as async mode.
661 * META FS metadata pages such as SIT, NAT, CP.
662 * NR_PAGE_TYPE The number of page types.
663 * META_FLUSH Make sure the previous pages are written
664 * with waiting the bio's completion
665 * ... Only can be used with META.
666 */
7d5e5109 667#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
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668enum page_type {
669 DATA,
670 NODE,
671 META,
672 NR_PAGE_TYPE,
673 META_FLUSH,
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674 INMEM, /* the below types are used by tracepoints only. */
675 INMEM_DROP,
676 IPU,
677 OPU,
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678};
679
458e6197 680struct f2fs_io_info {
05ca3632 681 struct f2fs_sb_info *sbi; /* f2fs_sb_info pointer */
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682 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
683 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
cf04e8eb 684 block_t blk_addr; /* block address to be written */
05ca3632 685 struct page *page; /* page to be written */
4375a336 686 struct page *encrypted_page; /* encrypted page */
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687};
688
93dfe2ac 689#define is_read_io(rw) (((rw) & 1) == READ)
1ff7bd3b 690struct f2fs_bio_info {
458e6197 691 struct f2fs_sb_info *sbi; /* f2fs superblock */
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692 struct bio *bio; /* bios to merge */
693 sector_t last_block_in_bio; /* last block number */
458e6197 694 struct f2fs_io_info fio; /* store buffered io info. */
df0f8dc0 695 struct rw_semaphore io_rwsem; /* blocking op for bio */
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696};
697
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698/* for inner inode cache management */
699struct inode_management {
700 struct radix_tree_root ino_root; /* ino entry array */
701 spinlock_t ino_lock; /* for ino entry lock */
702 struct list_head ino_list; /* inode list head */
703 unsigned long ino_num; /* number of entries */
704};
705
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706/* For s_flag in struct f2fs_sb_info */
707enum {
708 SBI_IS_DIRTY, /* dirty flag for checkpoint */
709 SBI_IS_CLOSE, /* specify unmounting */
710 SBI_NEED_FSCK, /* need fsck.f2fs to fix */
711 SBI_POR_DOING, /* recovery is doing or not */
712};
713
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714struct f2fs_sb_info {
715 struct super_block *sb; /* pointer to VFS super block */
5e176d54 716 struct proc_dir_entry *s_proc; /* proc entry */
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717 struct buffer_head *raw_super_buf; /* buffer head of raw sb */
718 struct f2fs_super_block *raw_super; /* raw super block pointer */
caf0047e 719 int s_flag; /* flags for sbi */
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720
721 /* for node-related operations */
722 struct f2fs_nm_info *nm_info; /* node manager */
723 struct inode *node_inode; /* cache node blocks */
724
725 /* for segment-related operations */
726 struct f2fs_sm_info *sm_info; /* segment manager */
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727
728 /* for bio operations */
924b720b 729 struct f2fs_bio_info read_io; /* for read bios */
1ff7bd3b 730 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
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731
732 /* for checkpoint */
733 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
734 struct inode *meta_inode; /* cache meta blocks */
39936837 735 struct mutex cp_mutex; /* checkpoint procedure lock */
e479556b 736 struct rw_semaphore cp_rwsem; /* blocking FS operations */
b3582c68 737 struct rw_semaphore node_write; /* locking node writes */
5463e7c1 738 struct mutex writepages; /* mutex for writepages() */
fb51b5ef 739 wait_queue_head_t cp_wait;
60b99b48 740 long cp_expires, cp_interval; /* next expected periodic cp */
39a53e0c 741
67298804 742 struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
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743
744 /* for orphan inode, use 0'th array */
0d47c1ad 745 unsigned int max_orphans; /* max orphan inodes */
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746
747 /* for directory inode management */
748 struct list_head dir_inode_list; /* dir inode list */
749 spinlock_t dir_inode_lock; /* for dir inode list lock */
39a53e0c 750
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751 /* for extent tree cache */
752 struct radix_tree_root extent_tree_root;/* cache extent cache entries */
753 struct rw_semaphore extent_tree_lock; /* locking extent radix tree */
754 struct list_head extent_list; /* lru list for shrinker */
755 spinlock_t extent_lock; /* locking extent lru list */
756 int total_ext_tree; /* extent tree count */
757 atomic_t total_ext_node; /* extent info count */
758
e1c42045 759 /* basic filesystem units */
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760 unsigned int log_sectors_per_block; /* log2 sectors per block */
761 unsigned int log_blocksize; /* log2 block size */
762 unsigned int blocksize; /* block size */
763 unsigned int root_ino_num; /* root inode number*/
764 unsigned int node_ino_num; /* node inode number*/
765 unsigned int meta_ino_num; /* meta inode number*/
766 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
767 unsigned int blocks_per_seg; /* blocks per segment */
768 unsigned int segs_per_sec; /* segments per section */
769 unsigned int secs_per_zone; /* sections per zone */
770 unsigned int total_sections; /* total section count */
771 unsigned int total_node_count; /* total node block count */
772 unsigned int total_valid_node_count; /* valid node block count */
773 unsigned int total_valid_inode_count; /* valid inode count */
774 int active_logs; /* # of active logs */
ab9fa662 775 int dir_level; /* directory level */
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776
777 block_t user_block_count; /* # of user blocks */
778 block_t total_valid_block_count; /* # of valid blocks */
779 block_t alloc_valid_block_count; /* # of allocated blocks */
a66cdd98 780 block_t discard_blks; /* discard command candidats */
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781 block_t last_valid_block_count; /* for recovery */
782 u32 s_next_generation; /* for NFS support */
783 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
784
785 struct f2fs_mount_info mount_opt; /* mount options */
786
787 /* for cleaning operations */
788 struct mutex gc_mutex; /* mutex for GC */
789 struct f2fs_gc_kthread *gc_thread; /* GC thread */
5ec4e49f 790 unsigned int cur_victim_sec; /* current victim section num */
39a53e0c 791
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792 /* maximum # of trials to find a victim segment for SSR and GC */
793 unsigned int max_victim_search;
794
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795 /*
796 * for stat information.
797 * one is for the LFS mode, and the other is for the SSR mode.
798 */
35b09d82 799#ifdef CONFIG_F2FS_STAT_FS
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800 struct f2fs_stat_info *stat_info; /* FS status information */
801 unsigned int segment_count[2]; /* # of allocated segments */
802 unsigned int block_count[2]; /* # of allocated blocks */
b9a2c252 803 atomic_t inplace_count; /* # of inplace update */
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804 atomic64_t total_hit_ext; /* # of lookup extent cache */
805 atomic64_t read_hit_rbtree; /* # of hit rbtree extent node */
806 atomic64_t read_hit_largest; /* # of hit largest extent node */
807 atomic64_t read_hit_cached; /* # of hit cached extent node */
d5e8f6c9 808 atomic_t inline_xattr; /* # of inline_xattr inodes */
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809 atomic_t inline_inode; /* # of inline_data inodes */
810 atomic_t inline_dir; /* # of inline_dentry inodes */
39a53e0c 811 int bg_gc; /* background gc calls */
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812 unsigned int n_dirty_dirs; /* # of dir inodes */
813#endif
814 unsigned int last_victim[2]; /* last victim segment # */
39a53e0c 815 spinlock_t stat_lock; /* lock for stat operations */
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816
817 /* For sysfs suppport */
818 struct kobject s_kobj;
819 struct completion s_kobj_unregister;
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820
821 /* For shrinker support */
822 struct list_head s_list;
823 struct mutex umount_mutex;
824 unsigned int shrinker_run_no;
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825};
826
827/*
828 * Inline functions
829 */
830static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
831{
832 return container_of(inode, struct f2fs_inode_info, vfs_inode);
833}
834
835static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
836{
837 return sb->s_fs_info;
838}
839
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840static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
841{
842 return F2FS_SB(inode->i_sb);
843}
844
845static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
846{
847 return F2FS_I_SB(mapping->host);
848}
849
850static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
851{
852 return F2FS_M_SB(page->mapping);
853}
854
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855static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
856{
857 return (struct f2fs_super_block *)(sbi->raw_super);
858}
859
860static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
861{
862 return (struct f2fs_checkpoint *)(sbi->ckpt);
863}
864
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865static inline struct f2fs_node *F2FS_NODE(struct page *page)
866{
867 return (struct f2fs_node *)page_address(page);
868}
869
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870static inline struct f2fs_inode *F2FS_INODE(struct page *page)
871{
872 return &((struct f2fs_node *)page_address(page))->i;
873}
874
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875static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
876{
877 return (struct f2fs_nm_info *)(sbi->nm_info);
878}
879
880static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
881{
882 return (struct f2fs_sm_info *)(sbi->sm_info);
883}
884
885static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
886{
887 return (struct sit_info *)(SM_I(sbi)->sit_info);
888}
889
890static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
891{
892 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
893}
894
895static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
896{
897 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
898}
899
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900static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
901{
902 return sbi->meta_inode->i_mapping;
903}
904
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905static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
906{
907 return sbi->node_inode->i_mapping;
908}
909
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910static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
911{
912 return sbi->s_flag & (0x01 << type);
913}
914
915static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
39a53e0c 916{
caf0047e 917 sbi->s_flag |= (0x01 << type);
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918}
919
caf0047e 920static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
39a53e0c 921{
caf0047e 922 sbi->s_flag &= ~(0x01 << type);
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923}
924
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925static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
926{
927 return le64_to_cpu(cp->checkpoint_ver);
928}
929
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930static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
931{
932 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
933 return ckpt_flags & f;
934}
935
936static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
937{
938 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
939 ckpt_flags |= f;
940 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
941}
942
943static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
944{
945 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
946 ckpt_flags &= (~f);
947 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
948}
949
e479556b 950static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
39936837 951{
e479556b 952 down_read(&sbi->cp_rwsem);
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953}
954
e479556b 955static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
39a53e0c 956{
e479556b 957 up_read(&sbi->cp_rwsem);
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958}
959
e479556b 960static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
39a53e0c 961{
0daaad97 962 f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
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963}
964
e479556b 965static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
39936837 966{
e479556b 967 up_write(&sbi->cp_rwsem);
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968}
969
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970static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
971{
972 int reason = CP_SYNC;
973
974 if (test_opt(sbi, FASTBOOT))
975 reason = CP_FASTBOOT;
976 if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))
977 reason = CP_UMOUNT;
978 return reason;
979}
980
981static inline bool __remain_node_summaries(int reason)
982{
983 return (reason == CP_UMOUNT || reason == CP_FASTBOOT);
984}
985
986static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
987{
988 return (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG) ||
989 is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FASTBOOT_FLAG));
990}
991
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992/*
993 * Check whether the given nid is within node id range.
994 */
064e0823 995static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
39a53e0c 996{
d6b7d4b3
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997 if (unlikely(nid < F2FS_ROOT_INO(sbi)))
998 return -EINVAL;
cfb271d4 999 if (unlikely(nid >= NM_I(sbi)->max_nid))
064e0823
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1000 return -EINVAL;
1001 return 0;
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1002}
1003
1004#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
1005
1006/*
1007 * Check whether the inode has blocks or not
1008 */
1009static inline int F2FS_HAS_BLOCKS(struct inode *inode)
1010{
1011 if (F2FS_I(inode)->i_xattr_nid)
6c311ec6 1012 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
39a53e0c 1013 else
6c311ec6 1014 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
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JK
1015}
1016
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1017static inline bool f2fs_has_xattr_block(unsigned int ofs)
1018{
1019 return ofs == XATTR_NODE_OFFSET;
1020}
1021
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1022static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
1023 struct inode *inode, blkcnt_t count)
1024{
1025 block_t valid_block_count;
1026
1027 spin_lock(&sbi->stat_lock);
1028 valid_block_count =
1029 sbi->total_valid_block_count + (block_t)count;
cfb271d4 1030 if (unlikely(valid_block_count > sbi->user_block_count)) {
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1031 spin_unlock(&sbi->stat_lock);
1032 return false;
1033 }
1034 inode->i_blocks += count;
1035 sbi->total_valid_block_count = valid_block_count;
1036 sbi->alloc_valid_block_count += (block_t)count;
1037 spin_unlock(&sbi->stat_lock);
1038 return true;
1039}
1040
da19b0dc 1041static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
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JK
1042 struct inode *inode,
1043 blkcnt_t count)
1044{
1045 spin_lock(&sbi->stat_lock);
9850cf4a
JK
1046 f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
1047 f2fs_bug_on(sbi, inode->i_blocks < count);
39a53e0c
JK
1048 inode->i_blocks -= count;
1049 sbi->total_valid_block_count -= (block_t)count;
1050 spin_unlock(&sbi->stat_lock);
39a53e0c
JK
1051}
1052
1053static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
1054{
1055 atomic_inc(&sbi->nr_pages[count_type]);
caf0047e 1056 set_sbi_flag(sbi, SBI_IS_DIRTY);
39a53e0c
JK
1057}
1058
a7ffdbe2 1059static inline void inode_inc_dirty_pages(struct inode *inode)
39a53e0c 1060{
a7ffdbe2
JK
1061 atomic_inc(&F2FS_I(inode)->dirty_pages);
1062 if (S_ISDIR(inode->i_mode))
1063 inc_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS);
39a53e0c
JK
1064}
1065
1066static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
1067{
1068 atomic_dec(&sbi->nr_pages[count_type]);
1069}
1070
a7ffdbe2 1071static inline void inode_dec_dirty_pages(struct inode *inode)
39a53e0c 1072{
5ac9f36f
CY
1073 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1074 !S_ISLNK(inode->i_mode))
1fe54f9d
JK
1075 return;
1076
a7ffdbe2
JK
1077 atomic_dec(&F2FS_I(inode)->dirty_pages);
1078
1079 if (S_ISDIR(inode->i_mode))
1080 dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_DENTS);
39a53e0c
JK
1081}
1082
1083static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
1084{
1085 return atomic_read(&sbi->nr_pages[count_type]);
1086}
1087
a7ffdbe2 1088static inline int get_dirty_pages(struct inode *inode)
f8b2c1f9 1089{
a7ffdbe2 1090 return atomic_read(&F2FS_I(inode)->dirty_pages);
f8b2c1f9
JK
1091}
1092
5ac206cf
NJ
1093static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
1094{
1095 unsigned int pages_per_sec = sbi->segs_per_sec *
1096 (1 << sbi->log_blocks_per_seg);
1097 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
1098 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
1099}
1100
39a53e0c
JK
1101static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
1102{
8b8343fa 1103 return sbi->total_valid_block_count;
39a53e0c
JK
1104}
1105
1106static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
1107{
1108 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1109
1110 /* return NAT or SIT bitmap */
1111 if (flag == NAT_BITMAP)
1112 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
1113 else if (flag == SIT_BITMAP)
1114 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
1115
1116 return 0;
1117}
1118
55141486
WL
1119static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
1120{
1121 return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
1122}
1123
39a53e0c
JK
1124static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
1125{
1126 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1dbe4152
CL
1127 int offset;
1128
55141486 1129 if (__cp_payload(sbi) > 0) {
1dbe4152
CL
1130 if (flag == NAT_BITMAP)
1131 return &ckpt->sit_nat_version_bitmap;
1132 else
65b85ccc 1133 return (unsigned char *)ckpt + F2FS_BLKSIZE;
1dbe4152
CL
1134 } else {
1135 offset = (flag == NAT_BITMAP) ?
25ca923b 1136 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
1dbe4152
CL
1137 return &ckpt->sit_nat_version_bitmap + offset;
1138 }
39a53e0c
JK
1139}
1140
1141static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
1142{
1143 block_t start_addr;
1144 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
d71b5564 1145 unsigned long long ckpt_version = cur_cp_version(ckpt);
39a53e0c 1146
25ca923b 1147 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
39a53e0c
JK
1148
1149 /*
1150 * odd numbered checkpoint should at cp segment 0
e1c42045 1151 * and even segment must be at cp segment 1
39a53e0c
JK
1152 */
1153 if (!(ckpt_version & 1))
1154 start_addr += sbi->blocks_per_seg;
1155
1156 return start_addr;
1157}
1158
1159static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
1160{
1161 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
1162}
1163
1164static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 1165 struct inode *inode)
39a53e0c
JK
1166{
1167 block_t valid_block_count;
1168 unsigned int valid_node_count;
1169
1170 spin_lock(&sbi->stat_lock);
1171
ef86d709 1172 valid_block_count = sbi->total_valid_block_count + 1;
cfb271d4 1173 if (unlikely(valid_block_count > sbi->user_block_count)) {
39a53e0c
JK
1174 spin_unlock(&sbi->stat_lock);
1175 return false;
1176 }
1177
ef86d709 1178 valid_node_count = sbi->total_valid_node_count + 1;
cfb271d4 1179 if (unlikely(valid_node_count > sbi->total_node_count)) {
39a53e0c
JK
1180 spin_unlock(&sbi->stat_lock);
1181 return false;
1182 }
1183
1184 if (inode)
ef86d709
GZ
1185 inode->i_blocks++;
1186
1187 sbi->alloc_valid_block_count++;
1188 sbi->total_valid_node_count++;
1189 sbi->total_valid_block_count++;
39a53e0c
JK
1190 spin_unlock(&sbi->stat_lock);
1191
1192 return true;
1193}
1194
1195static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
ef86d709 1196 struct inode *inode)
39a53e0c
JK
1197{
1198 spin_lock(&sbi->stat_lock);
1199
9850cf4a
JK
1200 f2fs_bug_on(sbi, !sbi->total_valid_block_count);
1201 f2fs_bug_on(sbi, !sbi->total_valid_node_count);
1202 f2fs_bug_on(sbi, !inode->i_blocks);
39a53e0c 1203
ef86d709
GZ
1204 inode->i_blocks--;
1205 sbi->total_valid_node_count--;
1206 sbi->total_valid_block_count--;
39a53e0c
JK
1207
1208 spin_unlock(&sbi->stat_lock);
1209}
1210
1211static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
1212{
8b8343fa 1213 return sbi->total_valid_node_count;
39a53e0c
JK
1214}
1215
1216static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
1217{
1218 spin_lock(&sbi->stat_lock);
9850cf4a 1219 f2fs_bug_on(sbi, sbi->total_valid_inode_count == sbi->total_node_count);
39a53e0c
JK
1220 sbi->total_valid_inode_count++;
1221 spin_unlock(&sbi->stat_lock);
1222}
1223
0e80220a 1224static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
39a53e0c
JK
1225{
1226 spin_lock(&sbi->stat_lock);
9850cf4a 1227 f2fs_bug_on(sbi, !sbi->total_valid_inode_count);
39a53e0c
JK
1228 sbi->total_valid_inode_count--;
1229 spin_unlock(&sbi->stat_lock);
39a53e0c
JK
1230}
1231
1232static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
1233{
8b8343fa 1234 return sbi->total_valid_inode_count;
39a53e0c
JK
1235}
1236
a56c7c6f
JK
1237static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
1238 pgoff_t index, bool for_write)
1239{
1240 if (!for_write)
1241 return grab_cache_page(mapping, index);
1242 return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
1243}
1244
6e2c64ad
JK
1245static inline void f2fs_copy_page(struct page *src, struct page *dst)
1246{
1247 char *src_kaddr = kmap(src);
1248 char *dst_kaddr = kmap(dst);
1249
1250 memcpy(dst_kaddr, src_kaddr, PAGE_SIZE);
1251 kunmap(dst);
1252 kunmap(src);
1253}
1254
39a53e0c
JK
1255static inline void f2fs_put_page(struct page *page, int unlock)
1256{
031fa8cc 1257 if (!page)
39a53e0c
JK
1258 return;
1259
1260 if (unlock) {
9850cf4a 1261 f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
39a53e0c
JK
1262 unlock_page(page);
1263 }
1264 page_cache_release(page);
1265}
1266
1267static inline void f2fs_put_dnode(struct dnode_of_data *dn)
1268{
1269 if (dn->node_page)
1270 f2fs_put_page(dn->node_page, 1);
1271 if (dn->inode_page && dn->node_page != dn->inode_page)
1272 f2fs_put_page(dn->inode_page, 0);
1273 dn->node_page = NULL;
1274 dn->inode_page = NULL;
1275}
1276
1277static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
e8512d2e 1278 size_t size)
39a53e0c 1279{
e8512d2e 1280 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
39a53e0c
JK
1281}
1282
7bd59381
GZ
1283static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
1284 gfp_t flags)
1285{
1286 void *entry;
7bd59381 1287
80c54505
JK
1288 entry = kmem_cache_alloc(cachep, flags);
1289 if (!entry)
1290 entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
7bd59381
GZ
1291 return entry;
1292}
1293
740432f8
JK
1294static inline struct bio *f2fs_bio_alloc(int npages)
1295{
1296 struct bio *bio;
1297
1298 /* No failure on bio allocation */
740432f8 1299 bio = bio_alloc(GFP_NOIO, npages);
80c54505
JK
1300 if (!bio)
1301 bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
740432f8
JK
1302 return bio;
1303}
1304
9be32d72
JK
1305static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
1306 unsigned long index, void *item)
1307{
1308 while (radix_tree_insert(root, index, item))
1309 cond_resched();
1310}
1311
39a53e0c
JK
1312#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
1313
1314static inline bool IS_INODE(struct page *page)
1315{
45590710 1316 struct f2fs_node *p = F2FS_NODE(page);
39a53e0c
JK
1317 return RAW_IS_INODE(p);
1318}
1319
1320static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
1321{
1322 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
1323}
1324
1325static inline block_t datablock_addr(struct page *node_page,
1326 unsigned int offset)
1327{
1328 struct f2fs_node *raw_node;
1329 __le32 *addr_array;
45590710 1330 raw_node = F2FS_NODE(node_page);
39a53e0c
JK
1331 addr_array = blkaddr_in_node(raw_node);
1332 return le32_to_cpu(addr_array[offset]);
1333}
1334
1335static inline int f2fs_test_bit(unsigned int nr, char *addr)
1336{
1337 int mask;
1338
1339 addr += (nr >> 3);
1340 mask = 1 << (7 - (nr & 0x07));
1341 return mask & *addr;
1342}
1343
a66cdd98
JK
1344static inline void f2fs_set_bit(unsigned int nr, char *addr)
1345{
1346 int mask;
1347
1348 addr += (nr >> 3);
1349 mask = 1 << (7 - (nr & 0x07));
1350 *addr |= mask;
1351}
1352
1353static inline void f2fs_clear_bit(unsigned int nr, char *addr)
1354{
1355 int mask;
1356
1357 addr += (nr >> 3);
1358 mask = 1 << (7 - (nr & 0x07));
1359 *addr &= ~mask;
1360}
1361
52aca074 1362static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
39a53e0c
JK
1363{
1364 int mask;
1365 int ret;
1366
1367 addr += (nr >> 3);
1368 mask = 1 << (7 - (nr & 0x07));
1369 ret = mask & *addr;
1370 *addr |= mask;
1371 return ret;
1372}
1373
52aca074 1374static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
39a53e0c
JK
1375{
1376 int mask;
1377 int ret;
1378
1379 addr += (nr >> 3);
1380 mask = 1 << (7 - (nr & 0x07));
1381 ret = mask & *addr;
1382 *addr &= ~mask;
1383 return ret;
1384}
1385
c6ac4c0e
GZ
1386static inline void f2fs_change_bit(unsigned int nr, char *addr)
1387{
1388 int mask;
1389
1390 addr += (nr >> 3);
1391 mask = 1 << (7 - (nr & 0x07));
1392 *addr ^= mask;
1393}
1394
39a53e0c
JK
1395/* used for f2fs_inode_info->flags */
1396enum {
1397 FI_NEW_INODE, /* indicate newly allocated inode */
b3783873 1398 FI_DIRTY_INODE, /* indicate inode is dirty or not */
ed57c27f 1399 FI_DIRTY_DIR, /* indicate directory has dirty pages */
39a53e0c
JK
1400 FI_INC_LINK, /* need to increment i_nlink */
1401 FI_ACL_MODE, /* indicate acl mode */
1402 FI_NO_ALLOC, /* should not allocate any blocks */
c9b63bd0 1403 FI_FREE_NID, /* free allocated nide */
699489bb 1404 FI_UPDATE_DIR, /* should update inode block for consistency */
74d0b917 1405 FI_DELAY_IPUT, /* used for the recovery */
c11abd1a 1406 FI_NO_EXTENT, /* not to use the extent cache */
444c580f 1407 FI_INLINE_XATTR, /* used for inline xattr */
1001b347 1408 FI_INLINE_DATA, /* used for inline data*/
34d67deb 1409 FI_INLINE_DENTRY, /* used for inline dentry */
fff04f90
JK
1410 FI_APPEND_WRITE, /* inode has appended data */
1411 FI_UPDATE_WRITE, /* inode has in-place-update data */
88b88a66
JK
1412 FI_NEED_IPU, /* used for ipu per file */
1413 FI_ATOMIC_FILE, /* indicate atomic file */
02a1335f 1414 FI_VOLATILE_FILE, /* indicate volatile file */
3c6c2beb 1415 FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
1e84371f 1416 FI_DROP_CACHE, /* drop dirty page cache */
b3d208f9 1417 FI_DATA_EXIST, /* indicate data exists */
510022a8 1418 FI_INLINE_DOTS, /* indicate inline dot dentries */
39a53e0c
JK
1419};
1420
1421static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
1422{
61e0f2d0
JK
1423 if (!test_bit(flag, &fi->flags))
1424 set_bit(flag, &fi->flags);
39a53e0c
JK
1425}
1426
1427static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
1428{
1429 return test_bit(flag, &fi->flags);
1430}
1431
1432static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1433{
61e0f2d0
JK
1434 if (test_bit(flag, &fi->flags))
1435 clear_bit(flag, &fi->flags);
39a53e0c
JK
1436}
1437
1438static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
1439{
1440 fi->i_acl_mode = mode;
1441 set_inode_flag(fi, FI_ACL_MODE);
1442}
1443
444c580f
JK
1444static inline void get_inline_info(struct f2fs_inode_info *fi,
1445 struct f2fs_inode *ri)
1446{
1447 if (ri->i_inline & F2FS_INLINE_XATTR)
1448 set_inode_flag(fi, FI_INLINE_XATTR);
1001b347
HL
1449 if (ri->i_inline & F2FS_INLINE_DATA)
1450 set_inode_flag(fi, FI_INLINE_DATA);
34d67deb
CY
1451 if (ri->i_inline & F2FS_INLINE_DENTRY)
1452 set_inode_flag(fi, FI_INLINE_DENTRY);
b3d208f9
JK
1453 if (ri->i_inline & F2FS_DATA_EXIST)
1454 set_inode_flag(fi, FI_DATA_EXIST);
510022a8
JK
1455 if (ri->i_inline & F2FS_INLINE_DOTS)
1456 set_inode_flag(fi, FI_INLINE_DOTS);
444c580f
JK
1457}
1458
1459static inline void set_raw_inline(struct f2fs_inode_info *fi,
1460 struct f2fs_inode *ri)
1461{
1462 ri->i_inline = 0;
1463
1464 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1465 ri->i_inline |= F2FS_INLINE_XATTR;
1001b347
HL
1466 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1467 ri->i_inline |= F2FS_INLINE_DATA;
34d67deb
CY
1468 if (is_inode_flag_set(fi, FI_INLINE_DENTRY))
1469 ri->i_inline |= F2FS_INLINE_DENTRY;
b3d208f9
JK
1470 if (is_inode_flag_set(fi, FI_DATA_EXIST))
1471 ri->i_inline |= F2FS_DATA_EXIST;
510022a8
JK
1472 if (is_inode_flag_set(fi, FI_INLINE_DOTS))
1473 ri->i_inline |= F2FS_INLINE_DOTS;
444c580f
JK
1474}
1475
987c7c31
CY
1476static inline int f2fs_has_inline_xattr(struct inode *inode)
1477{
1478 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1479}
1480
de93653f
JK
1481static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
1482{
987c7c31 1483 if (f2fs_has_inline_xattr(&fi->vfs_inode))
de93653f
JK
1484 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1485 return DEF_ADDRS_PER_INODE;
1486}
1487
65985d93
JK
1488static inline void *inline_xattr_addr(struct page *page)
1489{
695fd1ed 1490 struct f2fs_inode *ri = F2FS_INODE(page);
65985d93
JK
1491 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1492 F2FS_INLINE_XATTR_ADDRS]);
1493}
1494
1495static inline int inline_xattr_size(struct inode *inode)
1496{
987c7c31 1497 if (f2fs_has_inline_xattr(inode))
65985d93
JK
1498 return F2FS_INLINE_XATTR_ADDRS << 2;
1499 else
1500 return 0;
1501}
1502
0dbdc2ae
JK
1503static inline int f2fs_has_inline_data(struct inode *inode)
1504{
1505 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1506}
1507
b3d208f9
JK
1508static inline void f2fs_clear_inline_inode(struct inode *inode)
1509{
1510 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
1511 clear_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
1512}
1513
1514static inline int f2fs_exist_data(struct inode *inode)
1515{
1516 return is_inode_flag_set(F2FS_I(inode), FI_DATA_EXIST);
1517}
1518
510022a8
JK
1519static inline int f2fs_has_inline_dots(struct inode *inode)
1520{
1521 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DOTS);
1522}
1523
88b88a66
JK
1524static inline bool f2fs_is_atomic_file(struct inode *inode)
1525{
1526 return is_inode_flag_set(F2FS_I(inode), FI_ATOMIC_FILE);
1527}
1528
02a1335f
JK
1529static inline bool f2fs_is_volatile_file(struct inode *inode)
1530{
1531 return is_inode_flag_set(F2FS_I(inode), FI_VOLATILE_FILE);
1532}
1533
3c6c2beb
JK
1534static inline bool f2fs_is_first_block_written(struct inode *inode)
1535{
1536 return is_inode_flag_set(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
1537}
1538
1e84371f
JK
1539static inline bool f2fs_is_drop_cache(struct inode *inode)
1540{
1541 return is_inode_flag_set(F2FS_I(inode), FI_DROP_CACHE);
1542}
1543
1001b347
HL
1544static inline void *inline_data_addr(struct page *page)
1545{
695fd1ed 1546 struct f2fs_inode *ri = F2FS_INODE(page);
1001b347
HL
1547 return (void *)&(ri->i_addr[1]);
1548}
1549
34d67deb
CY
1550static inline int f2fs_has_inline_dentry(struct inode *inode)
1551{
1552 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DENTRY);
1553}
1554
9486ba44
JK
1555static inline void f2fs_dentry_kunmap(struct inode *dir, struct page *page)
1556{
1557 if (!f2fs_has_inline_dentry(dir))
1558 kunmap(page);
1559}
1560
b5492af7
JK
1561static inline int is_file(struct inode *inode, int type)
1562{
1563 return F2FS_I(inode)->i_advise & type;
1564}
1565
1566static inline void set_file(struct inode *inode, int type)
1567{
1568 F2FS_I(inode)->i_advise |= type;
1569}
1570
1571static inline void clear_file(struct inode *inode, int type)
1572{
1573 F2FS_I(inode)->i_advise &= ~type;
1574}
1575
77888c1e
JK
1576static inline int f2fs_readonly(struct super_block *sb)
1577{
1578 return sb->s_flags & MS_RDONLY;
1579}
1580
1e968fdf
JK
1581static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
1582{
1583 return is_set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1584}
1585
744602cf
JK
1586static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1587{
1588 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1589 sbi->sb->s_flags |= MS_RDONLY;
1590}
1591
eaa693f4
JK
1592static inline bool is_dot_dotdot(const struct qstr *str)
1593{
1594 if (str->len == 1 && str->name[0] == '.')
1595 return true;
1596
1597 if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
1598 return true;
1599
1600 return false;
1601}
1602
3e72f721
JK
1603static inline bool f2fs_may_extent_tree(struct inode *inode)
1604{
1605 mode_t mode = inode->i_mode;
1606
1607 if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE) ||
1608 is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT))
1609 return false;
1610
1611 return S_ISREG(mode);
1612}
1613
39307a8e
JK
1614static inline void *f2fs_kvmalloc(size_t size, gfp_t flags)
1615{
1616 void *ret;
1617
1618 ret = kmalloc(size, flags | __GFP_NOWARN);
1619 if (!ret)
1620 ret = __vmalloc(size, flags, PAGE_KERNEL);
1621 return ret;
1622}
1623
1624static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
1625{
1626 void *ret;
1627
1628 ret = kzalloc(size, flags | __GFP_NOWARN);
1629 if (!ret)
1630 ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
1631 return ret;
1632}
1633
a6dda0e6
CH
1634#define get_inode_mode(i) \
1635 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1636 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1637
267378d4
CY
1638/* get offset of first page in next direct node */
1639#define PGOFS_OF_NEXT_DNODE(pgofs, fi) \
1640 ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \
1641 (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \
1642 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi))
1643
39a53e0c
JK
1644/*
1645 * file.c
1646 */
1647int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1648void truncate_data_blocks(struct dnode_of_data *);
764aa3e9 1649int truncate_blocks(struct inode *, u64, bool);
b0154891 1650int f2fs_truncate(struct inode *, bool);
2d4d9fb5 1651int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
39a53e0c
JK
1652int f2fs_setattr(struct dentry *, struct iattr *);
1653int truncate_hole(struct inode *, pgoff_t, pgoff_t);
b292dcab 1654int truncate_data_blocks_range(struct dnode_of_data *, int);
39a53e0c 1655long f2fs_ioctl(struct file *, unsigned int, unsigned long);
e9750824 1656long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
39a53e0c
JK
1657
1658/*
1659 * inode.c
1660 */
1661void f2fs_set_inode_flags(struct inode *);
39a53e0c 1662struct inode *f2fs_iget(struct super_block *, unsigned long);
4660f9c0 1663int try_to_free_nats(struct f2fs_sb_info *, int);
39a53e0c 1664void update_inode(struct inode *, struct page *);
744602cf 1665void update_inode_page(struct inode *);
39a53e0c
JK
1666int f2fs_write_inode(struct inode *, struct writeback_control *);
1667void f2fs_evict_inode(struct inode *);
44c16156 1668void handle_failed_inode(struct inode *);
39a53e0c
JK
1669
1670/*
1671 * namei.c
1672 */
1673struct dentry *f2fs_get_parent(struct dentry *child);
1674
1675/*
1676 * dir.c
1677 */
dbeacf02 1678extern unsigned char f2fs_filetype_table[F2FS_FT_MAX];
510022a8 1679void set_de_type(struct f2fs_dir_entry *, umode_t);
6e22c691
JK
1680
1681struct f2fs_dir_entry *find_target_dentry(struct f2fs_filename *,
1682 f2fs_hash_t, int *, struct f2fs_dentry_ptr *);
7b3cd7d6 1683bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *,
d8c6822a 1684 unsigned int, struct f2fs_str *);
062a3e7b
JK
1685void do_make_empty_dir(struct inode *, struct inode *,
1686 struct f2fs_dentry_ptr *);
dbeacf02 1687struct page *init_inode_metadata(struct inode *, struct inode *,
bce8d112 1688 const struct qstr *, struct page *);
dbeacf02 1689void update_parent_metadata(struct inode *, struct inode *, unsigned int);
a82afa20 1690int room_for_filename(const void *, int, int);
dbeacf02 1691void f2fs_drop_nlink(struct inode *, struct inode *, struct page *);
39a53e0c
JK
1692struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1693 struct page **);
1694struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1695ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1696void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1697 struct page *, struct inode *);
e7d55452 1698int update_dent_inode(struct inode *, struct inode *, const struct qstr *);
510022a8 1699void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *,
3b4d732a 1700 const struct qstr *, f2fs_hash_t , unsigned int);
510022a8
JK
1701int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *, nid_t,
1702 umode_t);
dbeacf02
CY
1703void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *,
1704 struct inode *);
b97a9b5d 1705int f2fs_do_tmpfile(struct inode *, struct inode *);
39a53e0c
JK
1706bool f2fs_empty_dir(struct inode *);
1707
b7f7a5e0
AV
1708static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1709{
2b0143b5 1710 return __f2fs_add_link(d_inode(dentry->d_parent), &dentry->d_name,
510022a8 1711 inode, inode->i_ino, inode->i_mode);
b7f7a5e0
AV
1712}
1713
39a53e0c
JK
1714/*
1715 * super.c
1716 */
c5bda1c8 1717int f2fs_commit_super(struct f2fs_sb_info *, bool);
39a53e0c 1718int f2fs_sync_fs(struct super_block *, int);
a07ef784
NJ
1719extern __printf(3, 4)
1720void f2fs_msg(struct super_block *, const char *, const char *, ...);
39a53e0c
JK
1721
1722/*
1723 * hash.c
1724 */
eee6160f 1725f2fs_hash_t f2fs_dentry_hash(const struct qstr *);
39a53e0c
JK
1726
1727/*
1728 * node.c
1729 */
1730struct dnode_of_data;
1731struct node_info;
1732
6fb03f3a 1733bool available_free_memory(struct f2fs_sb_info *, int);
2dcf51ab 1734int need_dentry_mark(struct f2fs_sb_info *, nid_t);
88bd02c9 1735bool is_checkpointed_node(struct f2fs_sb_info *, nid_t);
88bd02c9 1736bool need_inode_block_update(struct f2fs_sb_info *, nid_t);
39a53e0c
JK
1737void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1738int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1739int truncate_inode_blocks(struct inode *, pgoff_t);
4f16fb0f 1740int truncate_xattr_node(struct inode *, struct page *);
cfe58f9d 1741int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
13ec7297 1742int remove_inode_page(struct inode *);
a014e037 1743struct page *new_inode_page(struct inode *);
8ae8f162 1744struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
39a53e0c
JK
1745void ra_node_page(struct f2fs_sb_info *, nid_t);
1746struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1747struct page *get_node_page_ra(struct page *, int);
1748void sync_inode_page(struct dnode_of_data *);
1749int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1750bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1751void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1752void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
31696580 1753int try_to_free_nids(struct f2fs_sb_info *, int);
70cfed88 1754void recover_inline_xattr(struct inode *, struct page *);
1c35a90e 1755void recover_xattr_data(struct inode *, struct page *, block_t);
39a53e0c
JK
1756int recover_inode_page(struct f2fs_sb_info *, struct page *);
1757int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1758 struct f2fs_summary_block *);
1759void flush_nat_entries(struct f2fs_sb_info *);
1760int build_node_manager(struct f2fs_sb_info *);
1761void destroy_node_manager(struct f2fs_sb_info *);
6e6093a8 1762int __init create_node_manager_caches(void);
39a53e0c
JK
1763void destroy_node_manager_caches(void);
1764
1765/*
1766 * segment.c
1767 */
88b88a66 1768void register_inmem_page(struct inode *, struct page *);
edb27dee 1769int commit_inmem_pages(struct inode *, bool);
39a53e0c 1770void f2fs_balance_fs(struct f2fs_sb_info *);
4660f9c0 1771void f2fs_balance_fs_bg(struct f2fs_sb_info *);
6b4afdd7 1772int f2fs_issue_flush(struct f2fs_sb_info *);
2163d198
GZ
1773int create_flush_cmd_control(struct f2fs_sb_info *);
1774void destroy_flush_cmd_control(struct f2fs_sb_info *);
39a53e0c 1775void invalidate_blocks(struct f2fs_sb_info *, block_t);
6e2c64ad 1776bool is_checkpointed_data(struct f2fs_sb_info *, block_t);
5e443818 1777void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
836b5a63 1778void clear_prefree_segments(struct f2fs_sb_info *, struct cp_control *);
4b2fecc8 1779void release_discard_addrs(struct f2fs_sb_info *);
e90c2d28 1780bool discard_next_dnode(struct f2fs_sb_info *, block_t);
3fa06d7b 1781int npages_for_summary_flush(struct f2fs_sb_info *, bool);
39a53e0c 1782void allocate_new_segments(struct f2fs_sb_info *);
4b2fecc8 1783int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *);
39a53e0c 1784struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
381722d2 1785void update_meta_page(struct f2fs_sb_info *, void *, block_t);
577e3495 1786void write_meta_page(struct f2fs_sb_info *, struct page *);
05ca3632
JK
1787void write_node_page(unsigned int, struct f2fs_io_info *);
1788void write_data_page(struct dnode_of_data *, struct f2fs_io_info *);
1789void rewrite_data_page(struct f2fs_io_info *);
528e3459
CY
1790void f2fs_replace_block(struct f2fs_sb_info *, struct dnode_of_data *,
1791 block_t, block_t, unsigned char, bool);
bfad7c2d
JK
1792void allocate_data_block(struct f2fs_sb_info *, struct page *,
1793 block_t, block_t *, struct f2fs_summary *, int);
5514f0aa 1794void f2fs_wait_on_page_writeback(struct page *, enum page_type);
08b39fbd 1795void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *, block_t);
39a53e0c
JK
1796void write_data_summaries(struct f2fs_sb_info *, block_t);
1797void write_node_summaries(struct f2fs_sb_info *, block_t);
1798int lookup_journal_in_cursum(struct f2fs_summary_block *,
1799 int, unsigned int, int);
4b2fecc8 1800void flush_sit_entries(struct f2fs_sb_info *, struct cp_control *);
39a53e0c 1801int build_segment_manager(struct f2fs_sb_info *);
39a53e0c 1802void destroy_segment_manager(struct f2fs_sb_info *);
7fd9e544
JK
1803int __init create_segment_manager_caches(void);
1804void destroy_segment_manager_caches(void);
39a53e0c
JK
1805
1806/*
1807 * checkpoint.c
1808 */
1809struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1810struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
2b947003 1811struct page *get_tmp_page(struct f2fs_sb_info *, pgoff_t);
f0c9cada 1812bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
26879fb1 1813int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int, bool);
635aee1f 1814void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
39a53e0c 1815long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
fff04f90
JK
1816void add_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
1817void remove_dirty_inode(struct f2fs_sb_info *, nid_t, int type);
6f12ac25 1818void release_dirty_inode(struct f2fs_sb_info *);
fff04f90 1819bool exist_written_data(struct f2fs_sb_info *, nid_t, int);
cbd56e7d
JK
1820int acquire_orphan_inode(struct f2fs_sb_info *);
1821void release_orphan_inode(struct f2fs_sb_info *);
39a53e0c
JK
1822void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1823void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
8c14bfad 1824int recover_orphan_inodes(struct f2fs_sb_info *);
39a53e0c 1825int get_valid_checkpoint(struct f2fs_sb_info *);
a7ffdbe2 1826void update_dirty_page(struct inode *, struct page *);
5deb8267 1827void add_dirty_dir_inode(struct inode *);
39a53e0c
JK
1828void remove_dirty_dir_inode(struct inode *);
1829void sync_dirty_dir_inodes(struct f2fs_sb_info *);
75ab4cb8 1830void write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
6451e041 1831void init_ino_entry_info(struct f2fs_sb_info *);
6e6093a8 1832int __init create_checkpoint_caches(void);
39a53e0c
JK
1833void destroy_checkpoint_caches(void);
1834
1835/*
1836 * data.c
1837 */
458e6197 1838void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
05ca3632
JK
1839int f2fs_submit_page_bio(struct f2fs_io_info *);
1840void f2fs_submit_page_mbio(struct f2fs_io_info *);
216a620a 1841void set_data_blkaddr(struct dnode_of_data *);
39a53e0c 1842int reserve_new_block(struct dnode_of_data *);
759af1c9 1843int f2fs_get_block(struct dnode_of_data *, pgoff_t);
b600965c 1844int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
a56c7c6f 1845struct page *get_read_data_page(struct inode *, pgoff_t, int, bool);
43f3eae1 1846struct page *find_data_page(struct inode *, pgoff_t);
a56c7c6f 1847struct page *get_lock_data_page(struct inode *, pgoff_t, bool);
64aa7ed9 1848struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
05ca3632 1849int do_write_data_page(struct f2fs_io_info *);
9ab70134 1850int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
487261f3
CY
1851void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
1852int f2fs_release_page(struct page *, gfp_t);
39a53e0c
JK
1853
1854/*
1855 * gc.c
1856 */
1857int start_gc_thread(struct f2fs_sb_info *);
1858void stop_gc_thread(struct f2fs_sb_info *);
de93653f 1859block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
d530d4d8 1860int f2fs_gc(struct f2fs_sb_info *, bool);
39a53e0c 1861void build_gc_manager(struct f2fs_sb_info *);
39a53e0c
JK
1862
1863/*
1864 * recovery.c
1865 */
6ead1142 1866int recover_fsync_data(struct f2fs_sb_info *);
39a53e0c
JK
1867bool space_for_roll_forward(struct f2fs_sb_info *);
1868
1869/*
1870 * debug.c
1871 */
1872#ifdef CONFIG_F2FS_STAT_FS
1873struct f2fs_stat_info {
1874 struct list_head stat_list;
1875 struct f2fs_sb_info *sbi;
39a53e0c
JK
1876 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1877 int main_area_segs, main_area_sections, main_area_zones;
5b7ee374
CY
1878 unsigned long long hit_largest, hit_cached, hit_rbtree;
1879 unsigned long long hit_total, total_ext;
029e13cc 1880 int ext_tree, ext_node;
39a53e0c 1881 int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
dd4e4b59 1882 int nats, dirty_nats, sits, dirty_sits, fnids;
39a53e0c 1883 int total_count, utilization;
d5e8f6c9
CY
1884 int bg_gc, inmem_pages, wb_pages;
1885 int inline_xattr, inline_inode, inline_dir;
39a53e0c
JK
1886 unsigned int valid_count, valid_node_count, valid_inode_count;
1887 unsigned int bimodal, avg_vblocks;
1888 int util_free, util_valid, util_invalid;
1889 int rsvd_segs, overp_segs;
1890 int dirty_count, node_pages, meta_pages;
942e0be6 1891 int prefree_count, call_count, cp_count;
39a53e0c 1892 int tot_segs, node_segs, data_segs, free_segs, free_secs;
e1235983 1893 int bg_node_segs, bg_data_segs;
39a53e0c 1894 int tot_blks, data_blks, node_blks;
e1235983 1895 int bg_data_blks, bg_node_blks;
39a53e0c
JK
1896 int curseg[NR_CURSEG_TYPE];
1897 int cursec[NR_CURSEG_TYPE];
1898 int curzone[NR_CURSEG_TYPE];
1899
1900 unsigned int segment_count[2];
1901 unsigned int block_count[2];
b9a2c252 1902 unsigned int inplace_count;
9edcdabf 1903 unsigned long long base_mem, cache_mem, page_mem;
39a53e0c
JK
1904};
1905
963d4f7d
GZ
1906static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1907{
6c311ec6 1908 return (struct f2fs_stat_info *)sbi->stat_info;
963d4f7d
GZ
1909}
1910
942e0be6 1911#define stat_inc_cp_count(si) ((si)->cp_count++)
dcdfff65
JK
1912#define stat_inc_call_count(si) ((si)->call_count++)
1913#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1914#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
1915#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
5b7ee374
CY
1916#define stat_inc_total_hit(sbi) (atomic64_inc(&(sbi)->total_hit_ext))
1917#define stat_inc_rbtree_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_rbtree))
1918#define stat_inc_largest_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_largest))
1919#define stat_inc_cached_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_cached))
d5e8f6c9
CY
1920#define stat_inc_inline_xattr(inode) \
1921 do { \
1922 if (f2fs_has_inline_xattr(inode)) \
1923 (atomic_inc(&F2FS_I_SB(inode)->inline_xattr)); \
1924 } while (0)
1925#define stat_dec_inline_xattr(inode) \
1926 do { \
1927 if (f2fs_has_inline_xattr(inode)) \
1928 (atomic_dec(&F2FS_I_SB(inode)->inline_xattr)); \
1929 } while (0)
0dbdc2ae
JK
1930#define stat_inc_inline_inode(inode) \
1931 do { \
1932 if (f2fs_has_inline_data(inode)) \
03e14d52 1933 (atomic_inc(&F2FS_I_SB(inode)->inline_inode)); \
0dbdc2ae
JK
1934 } while (0)
1935#define stat_dec_inline_inode(inode) \
1936 do { \
1937 if (f2fs_has_inline_data(inode)) \
03e14d52 1938 (atomic_dec(&F2FS_I_SB(inode)->inline_inode)); \
0dbdc2ae 1939 } while (0)
3289c061
JK
1940#define stat_inc_inline_dir(inode) \
1941 do { \
1942 if (f2fs_has_inline_dentry(inode)) \
03e14d52 1943 (atomic_inc(&F2FS_I_SB(inode)->inline_dir)); \
3289c061
JK
1944 } while (0)
1945#define stat_dec_inline_dir(inode) \
1946 do { \
1947 if (f2fs_has_inline_dentry(inode)) \
03e14d52 1948 (atomic_dec(&F2FS_I_SB(inode)->inline_dir)); \
3289c061 1949 } while (0)
dcdfff65
JK
1950#define stat_inc_seg_type(sbi, curseg) \
1951 ((sbi)->segment_count[(curseg)->alloc_type]++)
1952#define stat_inc_block_count(sbi, curseg) \
1953 ((sbi)->block_count[(curseg)->alloc_type]++)
b9a2c252
CL
1954#define stat_inc_inplace_blocks(sbi) \
1955 (atomic_inc(&(sbi)->inplace_count))
e1235983 1956#define stat_inc_seg_count(sbi, type, gc_type) \
39a53e0c 1957 do { \
963d4f7d 1958 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c 1959 (si)->tot_segs++; \
e1235983 1960 if (type == SUM_TYPE_DATA) { \
39a53e0c 1961 si->data_segs++; \
e1235983
CL
1962 si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0; \
1963 } else { \
39a53e0c 1964 si->node_segs++; \
e1235983
CL
1965 si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0; \
1966 } \
39a53e0c
JK
1967 } while (0)
1968
1969#define stat_inc_tot_blk_count(si, blks) \
1970 (si->tot_blks += (blks))
1971
e1235983 1972#define stat_inc_data_blk_count(sbi, blks, gc_type) \
39a53e0c 1973 do { \
963d4f7d 1974 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK
1975 stat_inc_tot_blk_count(si, blks); \
1976 si->data_blks += (blks); \
e1235983 1977 si->bg_data_blks += (gc_type == BG_GC) ? (blks) : 0; \
39a53e0c
JK
1978 } while (0)
1979
e1235983 1980#define stat_inc_node_blk_count(sbi, blks, gc_type) \
39a53e0c 1981 do { \
963d4f7d 1982 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
39a53e0c
JK
1983 stat_inc_tot_blk_count(si, blks); \
1984 si->node_blks += (blks); \
e1235983 1985 si->bg_node_blks += (gc_type == BG_GC) ? (blks) : 0; \
39a53e0c
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1986 } while (0)
1987
1988int f2fs_build_stats(struct f2fs_sb_info *);
1989void f2fs_destroy_stats(struct f2fs_sb_info *);
6e6093a8 1990void __init f2fs_create_root_stats(void);
4589d25d 1991void f2fs_destroy_root_stats(void);
39a53e0c 1992#else
942e0be6 1993#define stat_inc_cp_count(si)
39a53e0c 1994#define stat_inc_call_count(si)
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1995#define stat_inc_bggc_count(si)
1996#define stat_inc_dirty_dir(sbi)
1997#define stat_dec_dirty_dir(sbi)
1998#define stat_inc_total_hit(sb)
029e13cc 1999#define stat_inc_rbtree_node_hit(sb)
91c481ff
CY
2000#define stat_inc_largest_node_hit(sbi)
2001#define stat_inc_cached_node_hit(sbi)
d5e8f6c9
CY
2002#define stat_inc_inline_xattr(inode)
2003#define stat_dec_inline_xattr(inode)
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JK
2004#define stat_inc_inline_inode(inode)
2005#define stat_dec_inline_inode(inode)
3289c061
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2006#define stat_inc_inline_dir(inode)
2007#define stat_dec_inline_dir(inode)
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2008#define stat_inc_seg_type(sbi, curseg)
2009#define stat_inc_block_count(sbi, curseg)
b9a2c252 2010#define stat_inc_inplace_blocks(sbi)
e1235983 2011#define stat_inc_seg_count(sbi, type, gc_type)
39a53e0c 2012#define stat_inc_tot_blk_count(si, blks)
e1235983
CL
2013#define stat_inc_data_blk_count(sbi, blks, gc_type)
2014#define stat_inc_node_blk_count(sbi, blks, gc_type)
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2015
2016static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
2017static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
6e6093a8 2018static inline void __init f2fs_create_root_stats(void) { }
4589d25d 2019static inline void f2fs_destroy_root_stats(void) { }
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2020#endif
2021
2022extern const struct file_operations f2fs_dir_operations;
2023extern const struct file_operations f2fs_file_operations;
2024extern const struct inode_operations f2fs_file_inode_operations;
2025extern const struct address_space_operations f2fs_dblock_aops;
2026extern const struct address_space_operations f2fs_node_aops;
2027extern const struct address_space_operations f2fs_meta_aops;
2028extern const struct inode_operations f2fs_dir_inode_operations;
2029extern const struct inode_operations f2fs_symlink_inode_operations;
cbaf042a 2030extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
39a53e0c 2031extern const struct inode_operations f2fs_special_inode_operations;
29e7043f 2032extern struct kmem_cache *inode_entry_slab;
1001b347 2033
e18c65b2
HL
2034/*
2035 * inline.c
2036 */
01b960e9
JK
2037bool f2fs_may_inline_data(struct inode *);
2038bool f2fs_may_inline_dentry(struct inode *);
b3d208f9 2039void read_inline_data(struct page *, struct page *);
0bfcfcca 2040bool truncate_inline_inode(struct page *, u64);
e18c65b2 2041int f2fs_read_inline_data(struct inode *, struct page *);
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JK
2042int f2fs_convert_inline_page(struct dnode_of_data *, struct page *);
2043int f2fs_convert_inline_inode(struct inode *);
2044int f2fs_write_inline_data(struct inode *, struct page *);
0342fd30 2045bool recover_inline_data(struct inode *, struct page *);
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2046struct f2fs_dir_entry *find_in_inline_dir(struct inode *,
2047 struct f2fs_filename *, struct page **);
201a05be
CY
2048struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *, struct page **);
2049int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *);
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JK
2050int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *,
2051 nid_t, umode_t);
201a05be
CY
2052void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *,
2053 struct inode *, struct inode *);
2054bool f2fs_empty_inline_dir(struct inode *);
d8c6822a
JK
2055int f2fs_read_inline_dir(struct file *, struct dir_context *,
2056 struct f2fs_str *);
cde4de12 2057
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2058/*
2059 * shrinker.c
2060 */
2061unsigned long f2fs_shrink_count(struct shrinker *, struct shrink_control *);
2062unsigned long f2fs_shrink_scan(struct shrinker *, struct shrink_control *);
2063void f2fs_join_shrinker(struct f2fs_sb_info *);
2064void f2fs_leave_shrinker(struct f2fs_sb_info *);
2065
a28ef1f5
CY
2066/*
2067 * extent_cache.c
2068 */
2069unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
2070void f2fs_drop_largest_extent(struct inode *, pgoff_t);
2071void f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
2072unsigned int f2fs_destroy_extent_node(struct inode *);
2073void f2fs_destroy_extent_tree(struct inode *);
2074bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *);
2075void f2fs_update_extent_cache(struct dnode_of_data *);
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CY
2076void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
2077 pgoff_t, block_t, unsigned int);
a28ef1f5
CY
2078void init_extent_cache_info(struct f2fs_sb_info *);
2079int __init create_extent_cache(void);
2080void destroy_extent_cache(void);
2081
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2082/*
2083 * crypto support
2084 */
2085static inline int f2fs_encrypted_inode(struct inode *inode)
2086{
2087#ifdef CONFIG_F2FS_FS_ENCRYPTION
2088 return file_is_encrypt(inode);
2089#else
2090 return 0;
2091#endif
2092}
2093
2094static inline void f2fs_set_encrypted_inode(struct inode *inode)
2095{
2096#ifdef CONFIG_F2FS_FS_ENCRYPTION
2097 file_set_encrypt(inode);
2098#endif
2099}
2100
2101static inline bool f2fs_bio_encrypted(struct bio *bio)
2102{
2103#ifdef CONFIG_F2FS_FS_ENCRYPTION
2104 return unlikely(bio->bi_private != NULL);
2105#else
2106 return false;
2107#endif
2108}
2109
2110static inline int f2fs_sb_has_crypto(struct super_block *sb)
2111{
2112#ifdef CONFIG_F2FS_FS_ENCRYPTION
2113 return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT);
2114#else
2115 return 0;
2116#endif
2117}
f424f664 2118
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2119static inline bool f2fs_may_encrypt(struct inode *inode)
2120{
2121#ifdef CONFIG_F2FS_FS_ENCRYPTION
2122 mode_t mode = inode->i_mode;
2123
2124 return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
2125#else
2126 return 0;
2127#endif
2128}
2129
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2130/* crypto_policy.c */
2131int f2fs_is_child_context_consistent_with_parent(struct inode *,
2132 struct inode *);
2133int f2fs_inherit_context(struct inode *, struct inode *, struct page *);
2134int f2fs_process_policy(const struct f2fs_encryption_policy *, struct inode *);
2135int f2fs_get_policy(struct inode *, struct f2fs_encryption_policy *);
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2136
2137/* crypt.c */
8bacf6de 2138extern struct kmem_cache *f2fs_crypt_info_cachep;
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2139bool f2fs_valid_contents_enc_mode(uint32_t);
2140uint32_t f2fs_validate_encryption_key_size(uint32_t, uint32_t);
2141struct f2fs_crypto_ctx *f2fs_get_crypto_ctx(struct inode *);
2142void f2fs_release_crypto_ctx(struct f2fs_crypto_ctx *);
2143struct page *f2fs_encrypt(struct inode *, struct page *);
2144int f2fs_decrypt(struct f2fs_crypto_ctx *, struct page *);
2145int f2fs_decrypt_one(struct inode *, struct page *);
2146void f2fs_end_io_crypto_work(struct f2fs_crypto_ctx *, struct bio *);
2147
0adda907 2148/* crypto_key.c */
26bf3dc7 2149void f2fs_free_encryption_info(struct inode *, struct f2fs_crypt_info *);
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2150int _f2fs_get_encryption_info(struct inode *inode);
2151
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2152/* crypto_fname.c */
2153bool f2fs_valid_filenames_enc_mode(uint32_t);
2154u32 f2fs_fname_crypto_round_up(u32, u32);
2155int f2fs_fname_crypto_alloc_buffer(struct inode *, u32, struct f2fs_str *);
2156int f2fs_fname_disk_to_usr(struct inode *, f2fs_hash_t *,
2157 const struct f2fs_str *, struct f2fs_str *);
2158int f2fs_fname_usr_to_disk(struct inode *, const struct qstr *,
2159 struct f2fs_str *);
2160
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2161#ifdef CONFIG_F2FS_FS_ENCRYPTION
2162void f2fs_restore_and_release_control_page(struct page **);
2163void f2fs_restore_control_page(struct page *);
2164
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2165int __init f2fs_init_crypto(void);
2166int f2fs_crypto_initialize(void);
57e5055b 2167void f2fs_exit_crypto(void);
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2168
2169int f2fs_has_encryption_key(struct inode *);
2170
2171static inline int f2fs_get_encryption_info(struct inode *inode)
2172{
2173 struct f2fs_crypt_info *ci = F2FS_I(inode)->i_crypt_info;
2174
2175 if (!ci ||
2176 (ci->ci_keyring_key &&
2177 (ci->ci_keyring_key->flags & ((1 << KEY_FLAG_INVALIDATED) |
2178 (1 << KEY_FLAG_REVOKED) |
2179 (1 << KEY_FLAG_DEAD)))))
2180 return _f2fs_get_encryption_info(inode);
2181 return 0;
2182}
6b3bd08f 2183
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2184void f2fs_fname_crypto_free_buffer(struct f2fs_str *);
2185int f2fs_fname_setup_filename(struct inode *, const struct qstr *,
2186 int lookup, struct f2fs_filename *);
2187void f2fs_fname_free_filename(struct f2fs_filename *);
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2188#else
2189static inline void f2fs_restore_and_release_control_page(struct page **p) { }
2190static inline void f2fs_restore_control_page(struct page *p) { }
2191
cfc4d971 2192static inline int __init f2fs_init_crypto(void) { return 0; }
57e5055b 2193static inline void f2fs_exit_crypto(void) { }
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2194
2195static inline int f2fs_has_encryption_key(struct inode *i) { return 0; }
2196static inline int f2fs_get_encryption_info(struct inode *i) { return 0; }
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2197static inline void f2fs_fname_crypto_free_buffer(struct f2fs_str *p) { }
2198
2199static inline int f2fs_fname_setup_filename(struct inode *dir,
2200 const struct qstr *iname,
2201 int lookup, struct f2fs_filename *fname)
2202{
2203 memset(fname, 0, sizeof(struct f2fs_filename));
2204 fname->usr_fname = iname;
2205 fname->disk_name.name = (unsigned char *)iname->name;
2206 fname->disk_name.len = iname->len;
2207 return 0;
2208}
2209
2210static inline void f2fs_fname_free_filename(struct f2fs_filename *fname) { }
57e5055b 2211#endif
39a53e0c 2212#endif