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1/*
2 * fs/f2fs/f2fs.h
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef _LINUX_F2FS_H
12#define _LINUX_F2FS_H
13
14#include <linux/types.h>
15#include <linux/page-flags.h>
16#include <linux/buffer_head.h>
17#include <linux/slab.h>
18#include <linux/crc32.h>
19#include <linux/magic.h>
20#include <linux/kobject.h>
21#include <linux/sched.h>
22#include <linux/vmalloc.h>
23#include <linux/bio.h>
24#include <linux/blkdev.h>
25#include <linux/fscrypto.h>
26#include <crypto/hash.h>
27
28#ifdef CONFIG_F2FS_CHECK_FS
29#define f2fs_bug_on(sbi, condition) BUG_ON(condition)
30#else
31#define f2fs_bug_on(sbi, condition) \
32 do { \
33 if (unlikely(condition)) { \
34 WARN_ON(1); \
35 set_sbi_flag(sbi, SBI_NEED_FSCK); \
36 } \
37 } while (0)
38#endif
39
40/*
41 * For mount options
42 */
43#define F2FS_MOUNT_BG_GC 0x00000001
44#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
45#define F2FS_MOUNT_DISCARD 0x00000004
46#define F2FS_MOUNT_NOHEAP 0x00000008
47#define F2FS_MOUNT_XATTR_USER 0x00000010
48#define F2FS_MOUNT_POSIX_ACL 0x00000020
49#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
50#define F2FS_MOUNT_INLINE_XATTR 0x00000080
51#define F2FS_MOUNT_INLINE_DATA 0x00000100
52#define F2FS_MOUNT_INLINE_DENTRY 0x00000200
53#define F2FS_MOUNT_FLUSH_MERGE 0x00000400
54#define F2FS_MOUNT_NOBARRIER 0x00000800
55#define F2FS_MOUNT_FASTBOOT 0x00001000
56#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
57#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
58#define F2FS_MOUNT_DATA_FLUSH 0x00008000
59
60#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
61#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
62#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
63
64#define ver_after(a, b) (typecheck(unsigned long long, a) && \
65 typecheck(unsigned long long, b) && \
66 ((long long)((a) - (b)) > 0))
67
68typedef u32 block_t; /*
69 * should not change u32, since it is the on-disk block
70 * address format, __le32.
71 */
72typedef u32 nid_t;
73
74struct f2fs_mount_info {
75 unsigned int opt;
76};
77
78#define F2FS_FEATURE_ENCRYPT 0x0001
79
80#define F2FS_HAS_FEATURE(sb, mask) \
81 ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0)
82#define F2FS_SET_FEATURE(sb, mask) \
83 F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask)
84#define F2FS_CLEAR_FEATURE(sb, mask) \
85 F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask)
86
87/*
88 * For checkpoint manager
89 */
90enum {
91 NAT_BITMAP,
92 SIT_BITMAP
93};
94
95enum {
96 CP_UMOUNT,
97 CP_FASTBOOT,
98 CP_SYNC,
99 CP_RECOVERY,
100 CP_DISCARD,
101};
102
103#define DEF_BATCHED_TRIM_SECTIONS 32
104#define BATCHED_TRIM_SEGMENTS(sbi) \
105 (SM_I(sbi)->trim_sections * (sbi)->segs_per_sec)
106#define BATCHED_TRIM_BLOCKS(sbi) \
107 (BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg)
108#define DEF_CP_INTERVAL 60 /* 60 secs */
109#define DEF_IDLE_INTERVAL 120 /* 2 mins */
110
111struct cp_control {
112 int reason;
113 __u64 trim_start;
114 __u64 trim_end;
115 __u64 trim_minlen;
116 __u64 trimmed;
117};
118
119/*
120 * For CP/NAT/SIT/SSA readahead
121 */
122enum {
123 META_CP,
124 META_NAT,
125 META_SIT,
126 META_SSA,
127 META_POR,
128};
129
130/* for the list of ino */
131enum {
132 ORPHAN_INO, /* for orphan ino list */
133 APPEND_INO, /* for append ino list */
134 UPDATE_INO, /* for update ino list */
135 MAX_INO_ENTRY, /* max. list */
136};
137
138struct ino_entry {
139 struct list_head list; /* list head */
140 nid_t ino; /* inode number */
141};
142
143/* for the list of inodes to be GCed */
144struct inode_entry {
145 struct list_head list; /* list head */
146 struct inode *inode; /* vfs inode pointer */
147};
148
149/* for the list of blockaddresses to be discarded */
150struct discard_entry {
151 struct list_head list; /* list head */
152 block_t blkaddr; /* block address to be discarded */
153 int len; /* # of consecutive blocks of the discard */
154};
155
156/* for the list of fsync inodes, used only during recovery */
157struct fsync_inode_entry {
158 struct list_head list; /* list head */
159 struct inode *inode; /* vfs inode pointer */
160 block_t blkaddr; /* block address locating the last fsync */
161 block_t last_dentry; /* block address locating the last dentry */
162 block_t last_inode; /* block address locating the last inode */
163};
164
165#define nats_in_cursum(jnl) (le16_to_cpu(jnl->n_nats))
166#define sits_in_cursum(jnl) (le16_to_cpu(jnl->n_sits))
167
168#define nat_in_journal(jnl, i) (jnl->nat_j.entries[i].ne)
169#define nid_in_journal(jnl, i) (jnl->nat_j.entries[i].nid)
170#define sit_in_journal(jnl, i) (jnl->sit_j.entries[i].se)
171#define segno_in_journal(jnl, i) (jnl->sit_j.entries[i].segno)
172
173#define MAX_NAT_JENTRIES(jnl) (NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
174#define MAX_SIT_JENTRIES(jnl) (SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
175
176static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
177{
178 int before = nats_in_cursum(journal);
179 journal->n_nats = cpu_to_le16(before + i);
180 return before;
181}
182
183static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
184{
185 int before = sits_in_cursum(journal);
186 journal->n_sits = cpu_to_le16(before + i);
187 return before;
188}
189
190static inline bool __has_cursum_space(struct f2fs_journal *journal,
191 int size, int type)
192{
193 if (type == NAT_JOURNAL)
194 return size <= MAX_NAT_JENTRIES(journal);
195 return size <= MAX_SIT_JENTRIES(journal);
196}
197
198/*
199 * ioctl commands
200 */
201#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
202#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
203#define F2FS_IOC_GETVERSION FS_IOC_GETVERSION
204
205#define F2FS_IOCTL_MAGIC 0xf5
206#define F2FS_IOC_START_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 1)
207#define F2FS_IOC_COMMIT_ATOMIC_WRITE _IO(F2FS_IOCTL_MAGIC, 2)
208#define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3)
209#define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4)
210#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5)
211#define F2FS_IOC_GARBAGE_COLLECT _IO(F2FS_IOCTL_MAGIC, 6)
212#define F2FS_IOC_WRITE_CHECKPOINT _IO(F2FS_IOCTL_MAGIC, 7)
213#define F2FS_IOC_DEFRAGMENT _IO(F2FS_IOCTL_MAGIC, 8)
214
215#define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY
216#define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY
217#define F2FS_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT
218
219/*
220 * should be same as XFS_IOC_GOINGDOWN.
221 * Flags for going down operation used by FS_IOC_GOINGDOWN
222 */
223#define F2FS_IOC_SHUTDOWN _IOR('X', 125, __u32) /* Shutdown */
224#define F2FS_GOING_DOWN_FULLSYNC 0x0 /* going down with full sync */
225#define F2FS_GOING_DOWN_METASYNC 0x1 /* going down with metadata */
226#define F2FS_GOING_DOWN_NOSYNC 0x2 /* going down */
227#define F2FS_GOING_DOWN_METAFLUSH 0x3 /* going down with meta flush */
228
229#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
230/*
231 * ioctl commands in 32 bit emulation
232 */
233#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
234#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
235#define F2FS_IOC32_GETVERSION FS_IOC32_GETVERSION
236#endif
237
238struct f2fs_defragment {
239 u64 start;
240 u64 len;
241};
242
243/*
244 * For INODE and NODE manager
245 */
246/* for directory operations */
247struct f2fs_dentry_ptr {
248 struct inode *inode;
249 const void *bitmap;
250 struct f2fs_dir_entry *dentry;
251 __u8 (*filename)[F2FS_SLOT_LEN];
252 int max;
253};
254
255static inline void make_dentry_ptr(struct inode *inode,
256 struct f2fs_dentry_ptr *d, void *src, int type)
257{
258 d->inode = inode;
259
260 if (type == 1) {
261 struct f2fs_dentry_block *t = (struct f2fs_dentry_block *)src;
262 d->max = NR_DENTRY_IN_BLOCK;
263 d->bitmap = &t->dentry_bitmap;
264 d->dentry = t->dentry;
265 d->filename = t->filename;
266 } else {
267 struct f2fs_inline_dentry *t = (struct f2fs_inline_dentry *)src;
268 d->max = NR_INLINE_DENTRY;
269 d->bitmap = &t->dentry_bitmap;
270 d->dentry = t->dentry;
271 d->filename = t->filename;
272 }
273}
274
275/*
276 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
277 * as its node offset to distinguish from index node blocks.
278 * But some bits are used to mark the node block.
279 */
280#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
281 >> OFFSET_BIT_SHIFT)
282enum {
283 ALLOC_NODE, /* allocate a new node page if needed */
284 LOOKUP_NODE, /* look up a node without readahead */
285 LOOKUP_NODE_RA, /*
286 * look up a node with readahead called
287 * by get_data_block.
288 */
289};
290
291#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
292
293#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
294
295/* vector size for gang look-up from extent cache that consists of radix tree */
296#define EXT_TREE_VEC_SIZE 64
297
298/* for in-memory extent cache entry */
299#define F2FS_MIN_EXTENT_LEN 64 /* minimum extent length */
300
301/* number of extent info in extent cache we try to shrink */
302#define EXTENT_CACHE_SHRINK_NUMBER 128
303
304struct extent_info {
305 unsigned int fofs; /* start offset in a file */
306 u32 blk; /* start block address of the extent */
307 unsigned int len; /* length of the extent */
308};
309
310struct extent_node {
311 struct rb_node rb_node; /* rb node located in rb-tree */
312 struct list_head list; /* node in global extent list of sbi */
313 struct extent_info ei; /* extent info */
314 struct extent_tree *et; /* extent tree pointer */
315};
316
317struct extent_tree {
318 nid_t ino; /* inode number */
319 struct rb_root root; /* root of extent info rb-tree */
320 struct extent_node *cached_en; /* recently accessed extent node */
321 struct extent_info largest; /* largested extent info */
322 struct list_head list; /* to be used by sbi->zombie_list */
323 rwlock_t lock; /* protect extent info rb-tree */
324 atomic_t node_cnt; /* # of extent node in rb-tree*/
325};
326
327/*
328 * This structure is taken from ext4_map_blocks.
329 *
330 * Note that, however, f2fs uses NEW and MAPPED flags for f2fs_map_blocks().
331 */
332#define F2FS_MAP_NEW (1 << BH_New)
333#define F2FS_MAP_MAPPED (1 << BH_Mapped)
334#define F2FS_MAP_UNWRITTEN (1 << BH_Unwritten)
335#define F2FS_MAP_FLAGS (F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
336 F2FS_MAP_UNWRITTEN)
337
338struct f2fs_map_blocks {
339 block_t m_pblk;
340 block_t m_lblk;
341 unsigned int m_len;
342 unsigned int m_flags;
343 pgoff_t *m_next_pgofs; /* point next possible non-hole pgofs */
344};
345
346/* for flag in get_data_block */
347#define F2FS_GET_BLOCK_READ 0
348#define F2FS_GET_BLOCK_DIO 1
349#define F2FS_GET_BLOCK_FIEMAP 2
350#define F2FS_GET_BLOCK_BMAP 3
351#define F2FS_GET_BLOCK_PRE_DIO 4
352#define F2FS_GET_BLOCK_PRE_AIO 5
353
354/*
355 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
356 */
357#define FADVISE_COLD_BIT 0x01
358#define FADVISE_LOST_PINO_BIT 0x02
359#define FADVISE_ENCRYPT_BIT 0x04
360#define FADVISE_ENC_NAME_BIT 0x08
361
362#define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
363#define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
364#define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
365#define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
366#define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
367#define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
368#define file_is_encrypt(inode) is_file(inode, FADVISE_ENCRYPT_BIT)
369#define file_set_encrypt(inode) set_file(inode, FADVISE_ENCRYPT_BIT)
370#define file_clear_encrypt(inode) clear_file(inode, FADVISE_ENCRYPT_BIT)
371#define file_enc_name(inode) is_file(inode, FADVISE_ENC_NAME_BIT)
372#define file_set_enc_name(inode) set_file(inode, FADVISE_ENC_NAME_BIT)
373
374#define DEF_DIR_LEVEL 0
375
376struct f2fs_inode_info {
377 struct inode vfs_inode; /* serve a vfs inode */
378 unsigned long i_flags; /* keep an inode flags for ioctl */
379 unsigned char i_advise; /* use to give file attribute hints */
380 unsigned char i_dir_level; /* use for dentry level for large dir */
381 unsigned int i_current_depth; /* use only in directory structure */
382 unsigned int i_pino; /* parent inode number */
383 umode_t i_acl_mode; /* keep file acl mode temporarily */
384
385 /* Use below internally in f2fs*/
386 unsigned long flags; /* use to pass per-file flags */
387 struct rw_semaphore i_sem; /* protect fi info */
388 atomic_t dirty_pages; /* # of dirty pages */
389 f2fs_hash_t chash; /* hash value of given file name */
390 unsigned int clevel; /* maximum level of given file name */
391 nid_t i_xattr_nid; /* node id that contains xattrs */
392 unsigned long long xattr_ver; /* cp version of xattr modification */
393
394 struct list_head dirty_list; /* linked in global dirty list */
395 struct list_head inmem_pages; /* inmemory pages managed by f2fs */
396 struct mutex inmem_lock; /* lock for inmemory pages */
397 struct extent_tree *extent_tree; /* cached extent_tree entry */
398};
399
400static inline void get_extent_info(struct extent_info *ext,
401 struct f2fs_extent i_ext)
402{
403 ext->fofs = le32_to_cpu(i_ext.fofs);
404 ext->blk = le32_to_cpu(i_ext.blk);
405 ext->len = le32_to_cpu(i_ext.len);
406}
407
408static inline void set_raw_extent(struct extent_info *ext,
409 struct f2fs_extent *i_ext)
410{
411 i_ext->fofs = cpu_to_le32(ext->fofs);
412 i_ext->blk = cpu_to_le32(ext->blk);
413 i_ext->len = cpu_to_le32(ext->len);
414}
415
416static inline void set_extent_info(struct extent_info *ei, unsigned int fofs,
417 u32 blk, unsigned int len)
418{
419 ei->fofs = fofs;
420 ei->blk = blk;
421 ei->len = len;
422}
423
424static inline bool __is_extent_same(struct extent_info *ei1,
425 struct extent_info *ei2)
426{
427 return (ei1->fofs == ei2->fofs && ei1->blk == ei2->blk &&
428 ei1->len == ei2->len);
429}
430
431static inline bool __is_extent_mergeable(struct extent_info *back,
432 struct extent_info *front)
433{
434 return (back->fofs + back->len == front->fofs &&
435 back->blk + back->len == front->blk);
436}
437
438static inline bool __is_back_mergeable(struct extent_info *cur,
439 struct extent_info *back)
440{
441 return __is_extent_mergeable(back, cur);
442}
443
444static inline bool __is_front_mergeable(struct extent_info *cur,
445 struct extent_info *front)
446{
447 return __is_extent_mergeable(cur, front);
448}
449
450static inline void __try_update_largest_extent(struct extent_tree *et,
451 struct extent_node *en)
452{
453 if (en->ei.len > et->largest.len)
454 et->largest = en->ei;
455}
456
457struct f2fs_nm_info {
458 block_t nat_blkaddr; /* base disk address of NAT */
459 nid_t max_nid; /* maximum possible node ids */
460 nid_t available_nids; /* maximum available node ids */
461 nid_t next_scan_nid; /* the next nid to be scanned */
462 unsigned int ram_thresh; /* control the memory footprint */
463 unsigned int ra_nid_pages; /* # of nid pages to be readaheaded */
464 unsigned int dirty_nats_ratio; /* control dirty nats ratio threshold */
465
466 /* NAT cache management */
467 struct radix_tree_root nat_root;/* root of the nat entry cache */
468 struct radix_tree_root nat_set_root;/* root of the nat set cache */
469 struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
470 struct list_head nat_entries; /* cached nat entry list (clean) */
471 unsigned int nat_cnt; /* the # of cached nat entries */
472 unsigned int dirty_nat_cnt; /* total num of nat entries in set */
473
474 /* free node ids management */
475 struct radix_tree_root free_nid_root;/* root of the free_nid cache */
476 struct list_head free_nid_list; /* a list for free nids */
477 spinlock_t free_nid_list_lock; /* protect free nid list */
478 unsigned int fcnt; /* the number of free node id */
479 struct mutex build_lock; /* lock for build free nids */
480
481 /* for checkpoint */
482 char *nat_bitmap; /* NAT bitmap pointer */
483 int bitmap_size; /* bitmap size */
484};
485
486/*
487 * this structure is used as one of function parameters.
488 * all the information are dedicated to a given direct node block determined
489 * by the data offset in a file.
490 */
491struct dnode_of_data {
492 struct inode *inode; /* vfs inode pointer */
493 struct page *inode_page; /* its inode page, NULL is possible */
494 struct page *node_page; /* cached direct node page */
495 nid_t nid; /* node id of the direct node block */
496 unsigned int ofs_in_node; /* data offset in the node page */
497 bool inode_page_locked; /* inode page is locked or not */
498 bool node_changed; /* is node block changed */
499 char cur_level; /* level of hole node page */
500 char max_level; /* level of current page located */
501 block_t data_blkaddr; /* block address of the node block */
502};
503
504static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
505 struct page *ipage, struct page *npage, nid_t nid)
506{
507 memset(dn, 0, sizeof(*dn));
508 dn->inode = inode;
509 dn->inode_page = ipage;
510 dn->node_page = npage;
511 dn->nid = nid;
512}
513
514/*
515 * For SIT manager
516 *
517 * By default, there are 6 active log areas across the whole main area.
518 * When considering hot and cold data separation to reduce cleaning overhead,
519 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
520 * respectively.
521 * In the current design, you should not change the numbers intentionally.
522 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
523 * logs individually according to the underlying devices. (default: 6)
524 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
525 * data and 8 for node logs.
526 */
527#define NR_CURSEG_DATA_TYPE (3)
528#define NR_CURSEG_NODE_TYPE (3)
529#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
530
531enum {
532 CURSEG_HOT_DATA = 0, /* directory entry blocks */
533 CURSEG_WARM_DATA, /* data blocks */
534 CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
535 CURSEG_HOT_NODE, /* direct node blocks of directory files */
536 CURSEG_WARM_NODE, /* direct node blocks of normal files */
537 CURSEG_COLD_NODE, /* indirect node blocks */
538 NO_CHECK_TYPE,
539 CURSEG_DIRECT_IO, /* to use for the direct IO path */
540};
541
542struct flush_cmd {
543 struct completion wait;
544 struct llist_node llnode;
545 int ret;
546};
547
548struct flush_cmd_control {
549 struct task_struct *f2fs_issue_flush; /* flush thread */
550 wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
551 struct llist_head issue_list; /* list for command issue */
552 struct llist_node *dispatch_list; /* list for command dispatch */
553};
554
555struct f2fs_sm_info {
556 struct sit_info *sit_info; /* whole segment information */
557 struct free_segmap_info *free_info; /* free segment information */
558 struct dirty_seglist_info *dirty_info; /* dirty segment information */
559 struct curseg_info *curseg_array; /* active segment information */
560
561 block_t seg0_blkaddr; /* block address of 0'th segment */
562 block_t main_blkaddr; /* start block address of main area */
563 block_t ssa_blkaddr; /* start block address of SSA area */
564
565 unsigned int segment_count; /* total # of segments */
566 unsigned int main_segments; /* # of segments in main area */
567 unsigned int reserved_segments; /* # of reserved segments */
568 unsigned int ovp_segments; /* # of overprovision segments */
569
570 /* a threshold to reclaim prefree segments */
571 unsigned int rec_prefree_segments;
572
573 /* for small discard management */
574 struct list_head discard_list; /* 4KB discard list */
575 int nr_discards; /* # of discards in the list */
576 int max_discards; /* max. discards to be issued */
577
578 /* for batched trimming */
579 unsigned int trim_sections; /* # of sections to trim */
580
581 struct list_head sit_entry_set; /* sit entry set list */
582
583 unsigned int ipu_policy; /* in-place-update policy */
584 unsigned int min_ipu_util; /* in-place-update threshold */
585 unsigned int min_fsync_blocks; /* threshold for fsync */
586
587 /* for flush command control */
588 struct flush_cmd_control *cmd_control_info;
589
590};
591
592/*
593 * For superblock
594 */
595/*
596 * COUNT_TYPE for monitoring
597 *
598 * f2fs monitors the number of several block types such as on-writeback,
599 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
600 */
601enum count_type {
602 F2FS_WRITEBACK,
603 F2FS_DIRTY_DENTS,
604 F2FS_DIRTY_DATA,
605 F2FS_DIRTY_NODES,
606 F2FS_DIRTY_META,
607 F2FS_INMEM_PAGES,
608 NR_COUNT_TYPE,
609};
610
611/*
612 * The below are the page types of bios used in submit_bio().
613 * The available types are:
614 * DATA User data pages. It operates as async mode.
615 * NODE Node pages. It operates as async mode.
616 * META FS metadata pages such as SIT, NAT, CP.
617 * NR_PAGE_TYPE The number of page types.
618 * META_FLUSH Make sure the previous pages are written
619 * with waiting the bio's completion
620 * ... Only can be used with META.
621 */
622#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
623enum page_type {
624 DATA,
625 NODE,
626 META,
627 NR_PAGE_TYPE,
628 META_FLUSH,
629 INMEM, /* the below types are used by tracepoints only. */
630 INMEM_DROP,
631 INMEM_REVOKE,
632 IPU,
633 OPU,
634};
635
636struct f2fs_io_info {
637 struct f2fs_sb_info *sbi; /* f2fs_sb_info pointer */
638 enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
639 int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
640 block_t new_blkaddr; /* new block address to be written */
641 block_t old_blkaddr; /* old block address before Cow */
642 struct page *page; /* page to be written */
643 struct page *encrypted_page; /* encrypted page */
644};
645
646#define is_read_io(rw) (((rw) & 1) == READ)
647struct f2fs_bio_info {
648 struct f2fs_sb_info *sbi; /* f2fs superblock */
649 struct bio *bio; /* bios to merge */
650 sector_t last_block_in_bio; /* last block number */
651 struct f2fs_io_info fio; /* store buffered io info. */
652 struct rw_semaphore io_rwsem; /* blocking op for bio */
653};
654
655enum inode_type {
656 DIR_INODE, /* for dirty dir inode */
657 FILE_INODE, /* for dirty regular/symlink inode */
658 NR_INODE_TYPE,
659};
660
661/* for inner inode cache management */
662struct inode_management {
663 struct radix_tree_root ino_root; /* ino entry array */
664 spinlock_t ino_lock; /* for ino entry lock */
665 struct list_head ino_list; /* inode list head */
666 unsigned long ino_num; /* number of entries */
667};
668
669/* For s_flag in struct f2fs_sb_info */
670enum {
671 SBI_IS_DIRTY, /* dirty flag for checkpoint */
672 SBI_IS_CLOSE, /* specify unmounting */
673 SBI_NEED_FSCK, /* need fsck.f2fs to fix */
674 SBI_POR_DOING, /* recovery is doing or not */
675};
676
677enum {
678 CP_TIME,
679 REQ_TIME,
680 MAX_TIME,
681};
682
683struct f2fs_sb_info {
684 struct super_block *sb; /* pointer to VFS super block */
685 struct proc_dir_entry *s_proc; /* proc entry */
686 struct f2fs_super_block *raw_super; /* raw super block pointer */
687 int valid_super_block; /* valid super block no */
688 int s_flag; /* flags for sbi */
689
690 /* for node-related operations */
691 struct f2fs_nm_info *nm_info; /* node manager */
692 struct inode *node_inode; /* cache node blocks */
693
694 /* for segment-related operations */
695 struct f2fs_sm_info *sm_info; /* segment manager */
696
697 /* for bio operations */
698 struct f2fs_bio_info read_io; /* for read bios */
699 struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
700
701 /* for checkpoint */
702 struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
703 struct inode *meta_inode; /* cache meta blocks */
704 struct mutex cp_mutex; /* checkpoint procedure lock */
705 struct rw_semaphore cp_rwsem; /* blocking FS operations */
706 struct rw_semaphore node_write; /* locking node writes */
707 struct mutex writepages; /* mutex for writepages() */
708 wait_queue_head_t cp_wait;
709 unsigned long last_time[MAX_TIME]; /* to store time in jiffies */
710 long interval_time[MAX_TIME]; /* to store thresholds */
711
712 struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
713
714 /* for orphan inode, use 0'th array */
715 unsigned int max_orphans; /* max orphan inodes */
716
717 /* for inode management */
718 struct list_head inode_list[NR_INODE_TYPE]; /* dirty inode list */
719 spinlock_t inode_lock[NR_INODE_TYPE]; /* for dirty inode list lock */
720
721 /* for extent tree cache */
722 struct radix_tree_root extent_tree_root;/* cache extent cache entries */
723 struct rw_semaphore extent_tree_lock; /* locking extent radix tree */
724 struct list_head extent_list; /* lru list for shrinker */
725 spinlock_t extent_lock; /* locking extent lru list */
726 atomic_t total_ext_tree; /* extent tree count */
727 struct list_head zombie_list; /* extent zombie tree list */
728 atomic_t total_zombie_tree; /* extent zombie tree count */
729 atomic_t total_ext_node; /* extent info count */
730
731 /* basic filesystem units */
732 unsigned int log_sectors_per_block; /* log2 sectors per block */
733 unsigned int log_blocksize; /* log2 block size */
734 unsigned int blocksize; /* block size */
735 unsigned int root_ino_num; /* root inode number*/
736 unsigned int node_ino_num; /* node inode number*/
737 unsigned int meta_ino_num; /* meta inode number*/
738 unsigned int log_blocks_per_seg; /* log2 blocks per segment */
739 unsigned int blocks_per_seg; /* blocks per segment */
740 unsigned int segs_per_sec; /* segments per section */
741 unsigned int secs_per_zone; /* sections per zone */
742 unsigned int total_sections; /* total section count */
743 unsigned int total_node_count; /* total node block count */
744 unsigned int total_valid_node_count; /* valid node block count */
745 unsigned int total_valid_inode_count; /* valid inode count */
746 loff_t max_file_blocks; /* max block index of file */
747 int active_logs; /* # of active logs */
748 int dir_level; /* directory level */
749
750 block_t user_block_count; /* # of user blocks */
751 block_t total_valid_block_count; /* # of valid blocks */
752 block_t alloc_valid_block_count; /* # of allocated blocks */
753 block_t discard_blks; /* discard command candidats */
754 block_t last_valid_block_count; /* for recovery */
755 u32 s_next_generation; /* for NFS support */
756 atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
757
758 struct f2fs_mount_info mount_opt; /* mount options */
759
760 /* for cleaning operations */
761 struct mutex gc_mutex; /* mutex for GC */
762 struct f2fs_gc_kthread *gc_thread; /* GC thread */
763 unsigned int cur_victim_sec; /* current victim section num */
764
765 /* maximum # of trials to find a victim segment for SSR and GC */
766 unsigned int max_victim_search;
767
768 /*
769 * for stat information.
770 * one is for the LFS mode, and the other is for the SSR mode.
771 */
772#ifdef CONFIG_F2FS_STAT_FS
773 struct f2fs_stat_info *stat_info; /* FS status information */
774 unsigned int segment_count[2]; /* # of allocated segments */
775 unsigned int block_count[2]; /* # of allocated blocks */
776 atomic_t inplace_count; /* # of inplace update */
777 atomic64_t total_hit_ext; /* # of lookup extent cache */
778 atomic64_t read_hit_rbtree; /* # of hit rbtree extent node */
779 atomic64_t read_hit_largest; /* # of hit largest extent node */
780 atomic64_t read_hit_cached; /* # of hit cached extent node */
781 atomic_t inline_xattr; /* # of inline_xattr inodes */
782 atomic_t inline_inode; /* # of inline_data inodes */
783 atomic_t inline_dir; /* # of inline_dentry inodes */
784 int bg_gc; /* background gc calls */
785 unsigned int ndirty_inode[NR_INODE_TYPE]; /* # of dirty inodes */
786#endif
787 unsigned int last_victim[2]; /* last victim segment # */
788 spinlock_t stat_lock; /* lock for stat operations */
789
790 /* For sysfs suppport */
791 struct kobject s_kobj;
792 struct completion s_kobj_unregister;
793
794 /* For shrinker support */
795 struct list_head s_list;
796 struct mutex umount_mutex;
797 unsigned int shrinker_run_no;
798
799 /* For write statistics */
800 u64 sectors_written_start;
801 u64 kbytes_written;
802
803 /* Reference to checksum algorithm driver via cryptoapi */
804 struct crypto_shash *s_chksum_driver;
805};
806
807/* For write statistics. Suppose sector size is 512 bytes,
808 * and the return value is in kbytes. s is of struct f2fs_sb_info.
809 */
810#define BD_PART_WRITTEN(s) \
811(((u64)part_stat_read(s->sb->s_bdev->bd_part, sectors[1]) - \
812 s->sectors_written_start) >> 1)
813
814static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
815{
816 sbi->last_time[type] = jiffies;
817}
818
819static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
820{
821 struct timespec ts = {sbi->interval_time[type], 0};
822 unsigned long interval = timespec_to_jiffies(&ts);
823
824 return time_after(jiffies, sbi->last_time[type] + interval);
825}
826
827static inline bool is_idle(struct f2fs_sb_info *sbi)
828{
829 struct block_device *bdev = sbi->sb->s_bdev;
830 struct request_queue *q = bdev_get_queue(bdev);
831 struct request_list *rl = &q->root_rl;
832
833 if (rl->count[BLK_RW_SYNC] || rl->count[BLK_RW_ASYNC])
834 return 0;
835
836 return f2fs_time_over(sbi, REQ_TIME);
837}
838
839/*
840 * Inline functions
841 */
842static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
843 unsigned int length)
844{
845 SHASH_DESC_ON_STACK(shash, sbi->s_chksum_driver);
846 u32 *ctx = (u32 *)shash_desc_ctx(shash);
847 int err;
848
849 shash->tfm = sbi->s_chksum_driver;
850 shash->flags = 0;
851 *ctx = F2FS_SUPER_MAGIC;
852
853 err = crypto_shash_update(shash, address, length);
854 BUG_ON(err);
855
856 return *ctx;
857}
858
859static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
860 void *buf, size_t buf_size)
861{
862 return f2fs_crc32(sbi, buf, buf_size) == blk_crc;
863}
864
865static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
866{
867 return container_of(inode, struct f2fs_inode_info, vfs_inode);
868}
869
870static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
871{
872 return sb->s_fs_info;
873}
874
875static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
876{
877 return F2FS_SB(inode->i_sb);
878}
879
880static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
881{
882 return F2FS_I_SB(mapping->host);
883}
884
885static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
886{
887 return F2FS_M_SB(page->mapping);
888}
889
890static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
891{
892 return (struct f2fs_super_block *)(sbi->raw_super);
893}
894
895static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
896{
897 return (struct f2fs_checkpoint *)(sbi->ckpt);
898}
899
900static inline struct f2fs_node *F2FS_NODE(struct page *page)
901{
902 return (struct f2fs_node *)page_address(page);
903}
904
905static inline struct f2fs_inode *F2FS_INODE(struct page *page)
906{
907 return &((struct f2fs_node *)page_address(page))->i;
908}
909
910static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
911{
912 return (struct f2fs_nm_info *)(sbi->nm_info);
913}
914
915static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
916{
917 return (struct f2fs_sm_info *)(sbi->sm_info);
918}
919
920static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
921{
922 return (struct sit_info *)(SM_I(sbi)->sit_info);
923}
924
925static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
926{
927 return (struct free_segmap_info *)(SM_I(sbi)->free_info);
928}
929
930static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
931{
932 return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
933}
934
935static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
936{
937 return sbi->meta_inode->i_mapping;
938}
939
940static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
941{
942 return sbi->node_inode->i_mapping;
943}
944
945static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
946{
947 return sbi->s_flag & (0x01 << type);
948}
949
950static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
951{
952 sbi->s_flag |= (0x01 << type);
953}
954
955static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
956{
957 sbi->s_flag &= ~(0x01 << type);
958}
959
960static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
961{
962 return le64_to_cpu(cp->checkpoint_ver);
963}
964
965static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
966{
967 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
968 return ckpt_flags & f;
969}
970
971static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
972{
973 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
974 ckpt_flags |= f;
975 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
976}
977
978static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
979{
980 unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
981 ckpt_flags &= (~f);
982 cp->ckpt_flags = cpu_to_le32(ckpt_flags);
983}
984
985static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
986{
987 down_read(&sbi->cp_rwsem);
988}
989
990static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
991{
992 up_read(&sbi->cp_rwsem);
993}
994
995static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
996{
997 down_write(&sbi->cp_rwsem);
998}
999
1000static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
1001{
1002 up_write(&sbi->cp_rwsem);
1003}
1004
1005static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
1006{
1007 int reason = CP_SYNC;
1008
1009 if (test_opt(sbi, FASTBOOT))
1010 reason = CP_FASTBOOT;
1011 if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))
1012 reason = CP_UMOUNT;
1013 return reason;
1014}
1015
1016static inline bool __remain_node_summaries(int reason)
1017{
1018 return (reason == CP_UMOUNT || reason == CP_FASTBOOT);
1019}
1020
1021static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
1022{
1023 return (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG) ||
1024 is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FASTBOOT_FLAG));
1025}
1026
1027/*
1028 * Check whether the given nid is within node id range.
1029 */
1030static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
1031{
1032 if (unlikely(nid < F2FS_ROOT_INO(sbi)))
1033 return -EINVAL;
1034 if (unlikely(nid >= NM_I(sbi)->max_nid))
1035 return -EINVAL;
1036 return 0;
1037}
1038
1039#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
1040
1041/*
1042 * Check whether the inode has blocks or not
1043 */
1044static inline int F2FS_HAS_BLOCKS(struct inode *inode)
1045{
1046 if (F2FS_I(inode)->i_xattr_nid)
1047 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
1048 else
1049 return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
1050}
1051
1052static inline bool f2fs_has_xattr_block(unsigned int ofs)
1053{
1054 return ofs == XATTR_NODE_OFFSET;
1055}
1056
1057static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
1058 struct inode *inode, blkcnt_t count)
1059{
1060 block_t valid_block_count;
1061
1062 spin_lock(&sbi->stat_lock);
1063 valid_block_count =
1064 sbi->total_valid_block_count + (block_t)count;
1065 if (unlikely(valid_block_count > sbi->user_block_count)) {
1066 spin_unlock(&sbi->stat_lock);
1067 return false;
1068 }
1069 inode->i_blocks += count;
1070 sbi->total_valid_block_count = valid_block_count;
1071 sbi->alloc_valid_block_count += (block_t)count;
1072 spin_unlock(&sbi->stat_lock);
1073 return true;
1074}
1075
1076static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
1077 struct inode *inode,
1078 blkcnt_t count)
1079{
1080 spin_lock(&sbi->stat_lock);
1081 f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
1082 f2fs_bug_on(sbi, inode->i_blocks < count);
1083 inode->i_blocks -= count;
1084 sbi->total_valid_block_count -= (block_t)count;
1085 spin_unlock(&sbi->stat_lock);
1086}
1087
1088static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
1089{
1090 atomic_inc(&sbi->nr_pages[count_type]);
1091 set_sbi_flag(sbi, SBI_IS_DIRTY);
1092}
1093
1094static inline void inode_inc_dirty_pages(struct inode *inode)
1095{
1096 atomic_inc(&F2FS_I(inode)->dirty_pages);
1097 inc_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
1098 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
1099}
1100
1101static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
1102{
1103 atomic_dec(&sbi->nr_pages[count_type]);
1104}
1105
1106static inline void inode_dec_dirty_pages(struct inode *inode)
1107{
1108 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1109 !S_ISLNK(inode->i_mode))
1110 return;
1111
1112 atomic_dec(&F2FS_I(inode)->dirty_pages);
1113 dec_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
1114 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
1115}
1116
1117static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
1118{
1119 return atomic_read(&sbi->nr_pages[count_type]);
1120}
1121
1122static inline int get_dirty_pages(struct inode *inode)
1123{
1124 return atomic_read(&F2FS_I(inode)->dirty_pages);
1125}
1126
1127static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
1128{
1129 unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
1130 return ((get_pages(sbi, block_type) + pages_per_sec - 1)
1131 >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
1132}
1133
1134static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
1135{
1136 return sbi->total_valid_block_count;
1137}
1138
1139static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
1140{
1141 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1142
1143 /* return NAT or SIT bitmap */
1144 if (flag == NAT_BITMAP)
1145 return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
1146 else if (flag == SIT_BITMAP)
1147 return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
1148
1149 return 0;
1150}
1151
1152static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
1153{
1154 return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
1155}
1156
1157static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
1158{
1159 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1160 int offset;
1161
1162 if (__cp_payload(sbi) > 0) {
1163 if (flag == NAT_BITMAP)
1164 return &ckpt->sit_nat_version_bitmap;
1165 else
1166 return (unsigned char *)ckpt + F2FS_BLKSIZE;
1167 } else {
1168 offset = (flag == NAT_BITMAP) ?
1169 le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
1170 return &ckpt->sit_nat_version_bitmap + offset;
1171 }
1172}
1173
1174static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
1175{
1176 block_t start_addr;
1177 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1178 unsigned long long ckpt_version = cur_cp_version(ckpt);
1179
1180 start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
1181
1182 /*
1183 * odd numbered checkpoint should at cp segment 0
1184 * and even segment must be at cp segment 1
1185 */
1186 if (!(ckpt_version & 1))
1187 start_addr += sbi->blocks_per_seg;
1188
1189 return start_addr;
1190}
1191
1192static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
1193{
1194 return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
1195}
1196
1197static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
1198 struct inode *inode)
1199{
1200 block_t valid_block_count;
1201 unsigned int valid_node_count;
1202
1203 spin_lock(&sbi->stat_lock);
1204
1205 valid_block_count = sbi->total_valid_block_count + 1;
1206 if (unlikely(valid_block_count > sbi->user_block_count)) {
1207 spin_unlock(&sbi->stat_lock);
1208 return false;
1209 }
1210
1211 valid_node_count = sbi->total_valid_node_count + 1;
1212 if (unlikely(valid_node_count > sbi->total_node_count)) {
1213 spin_unlock(&sbi->stat_lock);
1214 return false;
1215 }
1216
1217 if (inode)
1218 inode->i_blocks++;
1219
1220 sbi->alloc_valid_block_count++;
1221 sbi->total_valid_node_count++;
1222 sbi->total_valid_block_count++;
1223 spin_unlock(&sbi->stat_lock);
1224
1225 return true;
1226}
1227
1228static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
1229 struct inode *inode)
1230{
1231 spin_lock(&sbi->stat_lock);
1232
1233 f2fs_bug_on(sbi, !sbi->total_valid_block_count);
1234 f2fs_bug_on(sbi, !sbi->total_valid_node_count);
1235 f2fs_bug_on(sbi, !inode->i_blocks);
1236
1237 inode->i_blocks--;
1238 sbi->total_valid_node_count--;
1239 sbi->total_valid_block_count--;
1240
1241 spin_unlock(&sbi->stat_lock);
1242}
1243
1244static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
1245{
1246 return sbi->total_valid_node_count;
1247}
1248
1249static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
1250{
1251 spin_lock(&sbi->stat_lock);
1252 f2fs_bug_on(sbi, sbi->total_valid_inode_count == sbi->total_node_count);
1253 sbi->total_valid_inode_count++;
1254 spin_unlock(&sbi->stat_lock);
1255}
1256
1257static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
1258{
1259 spin_lock(&sbi->stat_lock);
1260 f2fs_bug_on(sbi, !sbi->total_valid_inode_count);
1261 sbi->total_valid_inode_count--;
1262 spin_unlock(&sbi->stat_lock);
1263}
1264
1265static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
1266{
1267 return sbi->total_valid_inode_count;
1268}
1269
1270static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
1271 pgoff_t index, bool for_write)
1272{
1273 if (!for_write)
1274 return grab_cache_page(mapping, index);
1275 return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
1276}
1277
1278static inline void f2fs_copy_page(struct page *src, struct page *dst)
1279{
1280 char *src_kaddr = kmap(src);
1281 char *dst_kaddr = kmap(dst);
1282
1283 memcpy(dst_kaddr, src_kaddr, PAGE_SIZE);
1284 kunmap(dst);
1285 kunmap(src);
1286}
1287
1288static inline void f2fs_put_page(struct page *page, int unlock)
1289{
1290 if (!page)
1291 return;
1292
1293 if (unlock) {
1294 f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
1295 unlock_page(page);
1296 }
1297 put_page(page);
1298}
1299
1300static inline void f2fs_put_dnode(struct dnode_of_data *dn)
1301{
1302 if (dn->node_page)
1303 f2fs_put_page(dn->node_page, 1);
1304 if (dn->inode_page && dn->node_page != dn->inode_page)
1305 f2fs_put_page(dn->inode_page, 0);
1306 dn->node_page = NULL;
1307 dn->inode_page = NULL;
1308}
1309
1310static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
1311 size_t size)
1312{
1313 return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
1314}
1315
1316static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
1317 gfp_t flags)
1318{
1319 void *entry;
1320
1321 entry = kmem_cache_alloc(cachep, flags);
1322 if (!entry)
1323 entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
1324 return entry;
1325}
1326
1327static inline struct bio *f2fs_bio_alloc(int npages)
1328{
1329 struct bio *bio;
1330
1331 /* No failure on bio allocation */
1332 bio = bio_alloc(GFP_NOIO, npages);
1333 if (!bio)
1334 bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
1335 return bio;
1336}
1337
1338static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
1339 unsigned long index, void *item)
1340{
1341 while (radix_tree_insert(root, index, item))
1342 cond_resched();
1343}
1344
1345#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
1346
1347static inline bool IS_INODE(struct page *page)
1348{
1349 struct f2fs_node *p = F2FS_NODE(page);
1350 return RAW_IS_INODE(p);
1351}
1352
1353static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
1354{
1355 return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
1356}
1357
1358static inline block_t datablock_addr(struct page *node_page,
1359 unsigned int offset)
1360{
1361 struct f2fs_node *raw_node;
1362 __le32 *addr_array;
1363 raw_node = F2FS_NODE(node_page);
1364 addr_array = blkaddr_in_node(raw_node);
1365 return le32_to_cpu(addr_array[offset]);
1366}
1367
1368static inline int f2fs_test_bit(unsigned int nr, char *addr)
1369{
1370 int mask;
1371
1372 addr += (nr >> 3);
1373 mask = 1 << (7 - (nr & 0x07));
1374 return mask & *addr;
1375}
1376
1377static inline void f2fs_set_bit(unsigned int nr, char *addr)
1378{
1379 int mask;
1380
1381 addr += (nr >> 3);
1382 mask = 1 << (7 - (nr & 0x07));
1383 *addr |= mask;
1384}
1385
1386static inline void f2fs_clear_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
1395static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
1396{
1397 int mask;
1398 int ret;
1399
1400 addr += (nr >> 3);
1401 mask = 1 << (7 - (nr & 0x07));
1402 ret = mask & *addr;
1403 *addr |= mask;
1404 return ret;
1405}
1406
1407static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
1408{
1409 int mask;
1410 int ret;
1411
1412 addr += (nr >> 3);
1413 mask = 1 << (7 - (nr & 0x07));
1414 ret = mask & *addr;
1415 *addr &= ~mask;
1416 return ret;
1417}
1418
1419static inline void f2fs_change_bit(unsigned int nr, char *addr)
1420{
1421 int mask;
1422
1423 addr += (nr >> 3);
1424 mask = 1 << (7 - (nr & 0x07));
1425 *addr ^= mask;
1426}
1427
1428/* used for f2fs_inode_info->flags */
1429enum {
1430 FI_NEW_INODE, /* indicate newly allocated inode */
1431 FI_DIRTY_INODE, /* indicate inode is dirty or not */
1432 FI_DIRTY_DIR, /* indicate directory has dirty pages */
1433 FI_INC_LINK, /* need to increment i_nlink */
1434 FI_ACL_MODE, /* indicate acl mode */
1435 FI_NO_ALLOC, /* should not allocate any blocks */
1436 FI_FREE_NID, /* free allocated nide */
1437 FI_UPDATE_DIR, /* should update inode block for consistency */
1438 FI_DELAY_IPUT, /* used for the recovery */
1439 FI_NO_EXTENT, /* not to use the extent cache */
1440 FI_INLINE_XATTR, /* used for inline xattr */
1441 FI_INLINE_DATA, /* used for inline data*/
1442 FI_INLINE_DENTRY, /* used for inline dentry */
1443 FI_APPEND_WRITE, /* inode has appended data */
1444 FI_UPDATE_WRITE, /* inode has in-place-update data */
1445 FI_NEED_IPU, /* used for ipu per file */
1446 FI_ATOMIC_FILE, /* indicate atomic file */
1447 FI_VOLATILE_FILE, /* indicate volatile file */
1448 FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
1449 FI_DROP_CACHE, /* drop dirty page cache */
1450 FI_DATA_EXIST, /* indicate data exists */
1451 FI_INLINE_DOTS, /* indicate inline dot dentries */
1452 FI_DO_DEFRAG, /* indicate defragment is running */
1453 FI_DIRTY_FILE, /* indicate regular/symlink has dirty pages */
1454};
1455
1456static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
1457{
1458 if (!test_bit(flag, &fi->flags))
1459 set_bit(flag, &fi->flags);
1460}
1461
1462static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
1463{
1464 return test_bit(flag, &fi->flags);
1465}
1466
1467static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
1468{
1469 if (test_bit(flag, &fi->flags))
1470 clear_bit(flag, &fi->flags);
1471}
1472
1473static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
1474{
1475 fi->i_acl_mode = mode;
1476 set_inode_flag(fi, FI_ACL_MODE);
1477}
1478
1479static inline void get_inline_info(struct f2fs_inode_info *fi,
1480 struct f2fs_inode *ri)
1481{
1482 if (ri->i_inline & F2FS_INLINE_XATTR)
1483 set_inode_flag(fi, FI_INLINE_XATTR);
1484 if (ri->i_inline & F2FS_INLINE_DATA)
1485 set_inode_flag(fi, FI_INLINE_DATA);
1486 if (ri->i_inline & F2FS_INLINE_DENTRY)
1487 set_inode_flag(fi, FI_INLINE_DENTRY);
1488 if (ri->i_inline & F2FS_DATA_EXIST)
1489 set_inode_flag(fi, FI_DATA_EXIST);
1490 if (ri->i_inline & F2FS_INLINE_DOTS)
1491 set_inode_flag(fi, FI_INLINE_DOTS);
1492}
1493
1494static inline void set_raw_inline(struct f2fs_inode_info *fi,
1495 struct f2fs_inode *ri)
1496{
1497 ri->i_inline = 0;
1498
1499 if (is_inode_flag_set(fi, FI_INLINE_XATTR))
1500 ri->i_inline |= F2FS_INLINE_XATTR;
1501 if (is_inode_flag_set(fi, FI_INLINE_DATA))
1502 ri->i_inline |= F2FS_INLINE_DATA;
1503 if (is_inode_flag_set(fi, FI_INLINE_DENTRY))
1504 ri->i_inline |= F2FS_INLINE_DENTRY;
1505 if (is_inode_flag_set(fi, FI_DATA_EXIST))
1506 ri->i_inline |= F2FS_DATA_EXIST;
1507 if (is_inode_flag_set(fi, FI_INLINE_DOTS))
1508 ri->i_inline |= F2FS_INLINE_DOTS;
1509}
1510
1511static inline int f2fs_has_inline_xattr(struct inode *inode)
1512{
1513 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
1514}
1515
1516static inline unsigned int addrs_per_inode(struct inode *inode)
1517{
1518 if (f2fs_has_inline_xattr(inode))
1519 return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
1520 return DEF_ADDRS_PER_INODE;
1521}
1522
1523static inline void *inline_xattr_addr(struct page *page)
1524{
1525 struct f2fs_inode *ri = F2FS_INODE(page);
1526 return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
1527 F2FS_INLINE_XATTR_ADDRS]);
1528}
1529
1530static inline int inline_xattr_size(struct inode *inode)
1531{
1532 if (f2fs_has_inline_xattr(inode))
1533 return F2FS_INLINE_XATTR_ADDRS << 2;
1534 else
1535 return 0;
1536}
1537
1538static inline int f2fs_has_inline_data(struct inode *inode)
1539{
1540 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DATA);
1541}
1542
1543static inline void f2fs_clear_inline_inode(struct inode *inode)
1544{
1545 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
1546 clear_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
1547}
1548
1549static inline int f2fs_exist_data(struct inode *inode)
1550{
1551 return is_inode_flag_set(F2FS_I(inode), FI_DATA_EXIST);
1552}
1553
1554static inline int f2fs_has_inline_dots(struct inode *inode)
1555{
1556 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DOTS);
1557}
1558
1559static inline bool f2fs_is_atomic_file(struct inode *inode)
1560{
1561 return is_inode_flag_set(F2FS_I(inode), FI_ATOMIC_FILE);
1562}
1563
1564static inline bool f2fs_is_volatile_file(struct inode *inode)
1565{
1566 return is_inode_flag_set(F2FS_I(inode), FI_VOLATILE_FILE);
1567}
1568
1569static inline bool f2fs_is_first_block_written(struct inode *inode)
1570{
1571 return is_inode_flag_set(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
1572}
1573
1574static inline bool f2fs_is_drop_cache(struct inode *inode)
1575{
1576 return is_inode_flag_set(F2FS_I(inode), FI_DROP_CACHE);
1577}
1578
1579static inline void *inline_data_addr(struct page *page)
1580{
1581 struct f2fs_inode *ri = F2FS_INODE(page);
1582 return (void *)&(ri->i_addr[1]);
1583}
1584
1585static inline int f2fs_has_inline_dentry(struct inode *inode)
1586{
1587 return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DENTRY);
1588}
1589
1590static inline void f2fs_dentry_kunmap(struct inode *dir, struct page *page)
1591{
1592 if (!f2fs_has_inline_dentry(dir))
1593 kunmap(page);
1594}
1595
1596static inline int is_file(struct inode *inode, int type)
1597{
1598 return F2FS_I(inode)->i_advise & type;
1599}
1600
1601static inline void set_file(struct inode *inode, int type)
1602{
1603 F2FS_I(inode)->i_advise |= type;
1604}
1605
1606static inline void clear_file(struct inode *inode, int type)
1607{
1608 F2FS_I(inode)->i_advise &= ~type;
1609}
1610
1611static inline int f2fs_readonly(struct super_block *sb)
1612{
1613 return sb->s_flags & MS_RDONLY;
1614}
1615
1616static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
1617{
1618 return is_set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1619}
1620
1621static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
1622{
1623 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
1624 sbi->sb->s_flags |= MS_RDONLY;
1625}
1626
1627static inline bool is_dot_dotdot(const struct qstr *str)
1628{
1629 if (str->len == 1 && str->name[0] == '.')
1630 return true;
1631
1632 if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
1633 return true;
1634
1635 return false;
1636}
1637
1638static inline bool f2fs_may_extent_tree(struct inode *inode)
1639{
1640 if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE) ||
1641 is_inode_flag_set(F2FS_I(inode), FI_NO_EXTENT))
1642 return false;
1643
1644 return S_ISREG(inode->i_mode);
1645}
1646
1647static inline void *f2fs_kvmalloc(size_t size, gfp_t flags)
1648{
1649 void *ret;
1650
1651 ret = kmalloc(size, flags | __GFP_NOWARN);
1652 if (!ret)
1653 ret = __vmalloc(size, flags, PAGE_KERNEL);
1654 return ret;
1655}
1656
1657static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
1658{
1659 void *ret;
1660
1661 ret = kzalloc(size, flags | __GFP_NOWARN);
1662 if (!ret)
1663 ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
1664 return ret;
1665}
1666
1667#define get_inode_mode(i) \
1668 ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
1669 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
1670
1671/* get offset of first page in next direct node */
1672#define PGOFS_OF_NEXT_DNODE(pgofs, inode) \
1673 ((pgofs < ADDRS_PER_INODE(inode)) ? ADDRS_PER_INODE(inode) : \
1674 (pgofs - ADDRS_PER_INODE(inode) + ADDRS_PER_BLOCK) / \
1675 ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode))
1676
1677/*
1678 * file.c
1679 */
1680int f2fs_sync_file(struct file *, loff_t, loff_t, int);
1681void truncate_data_blocks(struct dnode_of_data *);
1682int truncate_blocks(struct inode *, u64, bool);
1683int f2fs_truncate(struct inode *, bool);
1684int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
1685int f2fs_setattr(struct dentry *, struct iattr *);
1686int truncate_hole(struct inode *, pgoff_t, pgoff_t);
1687int truncate_data_blocks_range(struct dnode_of_data *, int);
1688long f2fs_ioctl(struct file *, unsigned int, unsigned long);
1689long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
1690
1691/*
1692 * inode.c
1693 */
1694void f2fs_set_inode_flags(struct inode *);
1695struct inode *f2fs_iget(struct super_block *, unsigned long);
1696int try_to_free_nats(struct f2fs_sb_info *, int);
1697int update_inode(struct inode *, struct page *);
1698int update_inode_page(struct inode *);
1699int f2fs_write_inode(struct inode *, struct writeback_control *);
1700void f2fs_evict_inode(struct inode *);
1701void handle_failed_inode(struct inode *);
1702
1703/*
1704 * namei.c
1705 */
1706struct dentry *f2fs_get_parent(struct dentry *child);
1707
1708/*
1709 * dir.c
1710 */
1711extern unsigned char f2fs_filetype_table[F2FS_FT_MAX];
1712void set_de_type(struct f2fs_dir_entry *, umode_t);
1713
1714struct f2fs_dir_entry *find_target_dentry(struct fscrypt_name *,
1715 f2fs_hash_t, int *, struct f2fs_dentry_ptr *);
1716bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *,
1717 unsigned int, struct fscrypt_str *);
1718void do_make_empty_dir(struct inode *, struct inode *,
1719 struct f2fs_dentry_ptr *);
1720struct page *init_inode_metadata(struct inode *, struct inode *,
1721 const struct qstr *, struct page *);
1722void update_parent_metadata(struct inode *, struct inode *, unsigned int);
1723int room_for_filename(const void *, int, int);
1724void f2fs_drop_nlink(struct inode *, struct inode *, struct page *);
1725struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
1726 struct page **);
1727struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
1728ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
1729void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
1730 struct page *, struct inode *);
1731int update_dent_inode(struct inode *, struct inode *, const struct qstr *);
1732void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *,
1733 const struct qstr *, f2fs_hash_t , unsigned int);
1734int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *, nid_t,
1735 umode_t);
1736void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *,
1737 struct inode *);
1738int f2fs_do_tmpfile(struct inode *, struct inode *);
1739bool f2fs_empty_dir(struct inode *);
1740
1741static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
1742{
1743 return __f2fs_add_link(d_inode(dentry->d_parent), &dentry->d_name,
1744 inode, inode->i_ino, inode->i_mode);
1745}
1746
1747/*
1748 * super.c
1749 */
1750int f2fs_commit_super(struct f2fs_sb_info *, bool);
1751int f2fs_sync_fs(struct super_block *, int);
1752extern __printf(3, 4)
1753void f2fs_msg(struct super_block *, const char *, const char *, ...);
1754int sanity_check_ckpt(struct f2fs_sb_info *sbi);
1755
1756/*
1757 * hash.c
1758 */
1759f2fs_hash_t f2fs_dentry_hash(const struct qstr *);
1760
1761/*
1762 * node.c
1763 */
1764struct dnode_of_data;
1765struct node_info;
1766
1767bool available_free_memory(struct f2fs_sb_info *, int);
1768int need_dentry_mark(struct f2fs_sb_info *, nid_t);
1769bool is_checkpointed_node(struct f2fs_sb_info *, nid_t);
1770bool need_inode_block_update(struct f2fs_sb_info *, nid_t);
1771void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
1772pgoff_t get_next_page_offset(struct dnode_of_data *, pgoff_t);
1773int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
1774int truncate_inode_blocks(struct inode *, pgoff_t);
1775int truncate_xattr_node(struct inode *, struct page *);
1776int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
1777int remove_inode_page(struct inode *);
1778struct page *new_inode_page(struct inode *);
1779struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
1780void ra_node_page(struct f2fs_sb_info *, nid_t);
1781struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
1782struct page *get_node_page_ra(struct page *, int);
1783void sync_inode_page(struct dnode_of_data *);
1784int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
1785bool alloc_nid(struct f2fs_sb_info *, nid_t *);
1786void alloc_nid_done(struct f2fs_sb_info *, nid_t);
1787void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
1788int try_to_free_nids(struct f2fs_sb_info *, int);
1789void recover_inline_xattr(struct inode *, struct page *);
1790void recover_xattr_data(struct inode *, struct page *, block_t);
1791int recover_inode_page(struct f2fs_sb_info *, struct page *);
1792int restore_node_summary(struct f2fs_sb_info *, unsigned int,
1793 struct f2fs_summary_block *);
1794void flush_nat_entries(struct f2fs_sb_info *);
1795int build_node_manager(struct f2fs_sb_info *);
1796void destroy_node_manager(struct f2fs_sb_info *);
1797int __init create_node_manager_caches(void);
1798void destroy_node_manager_caches(void);
1799
1800/*
1801 * segment.c
1802 */
1803void register_inmem_page(struct inode *, struct page *);
1804void drop_inmem_pages(struct inode *);
1805int commit_inmem_pages(struct inode *);
1806void f2fs_balance_fs(struct f2fs_sb_info *, bool);
1807void f2fs_balance_fs_bg(struct f2fs_sb_info *);
1808int f2fs_issue_flush(struct f2fs_sb_info *);
1809int create_flush_cmd_control(struct f2fs_sb_info *);
1810void destroy_flush_cmd_control(struct f2fs_sb_info *);
1811void invalidate_blocks(struct f2fs_sb_info *, block_t);
1812bool is_checkpointed_data(struct f2fs_sb_info *, block_t);
1813void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
1814void clear_prefree_segments(struct f2fs_sb_info *, struct cp_control *);
1815void release_discard_addrs(struct f2fs_sb_info *);
1816bool discard_next_dnode(struct f2fs_sb_info *, block_t);
1817int npages_for_summary_flush(struct f2fs_sb_info *, bool);
1818void allocate_new_segments(struct f2fs_sb_info *);
1819int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *);
1820struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
1821void update_meta_page(struct f2fs_sb_info *, void *, block_t);
1822void write_meta_page(struct f2fs_sb_info *, struct page *);
1823void write_node_page(unsigned int, struct f2fs_io_info *);
1824void write_data_page(struct dnode_of_data *, struct f2fs_io_info *);
1825void rewrite_data_page(struct f2fs_io_info *);
1826void __f2fs_replace_block(struct f2fs_sb_info *, struct f2fs_summary *,
1827 block_t, block_t, bool, bool);
1828void f2fs_replace_block(struct f2fs_sb_info *, struct dnode_of_data *,
1829 block_t, block_t, unsigned char, bool, bool);
1830void allocate_data_block(struct f2fs_sb_info *, struct page *,
1831 block_t, block_t *, struct f2fs_summary *, int);
1832void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
1833void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *, block_t);
1834void write_data_summaries(struct f2fs_sb_info *, block_t);
1835void write_node_summaries(struct f2fs_sb_info *, block_t);
1836int lookup_journal_in_cursum(struct f2fs_journal *, int, unsigned int, int);
1837void flush_sit_entries(struct f2fs_sb_info *, struct cp_control *);
1838int build_segment_manager(struct f2fs_sb_info *);
1839void destroy_segment_manager(struct f2fs_sb_info *);
1840int __init create_segment_manager_caches(void);
1841void destroy_segment_manager_caches(void);
1842
1843/*
1844 * checkpoint.c
1845 */
1846struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
1847struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
1848struct page *get_tmp_page(struct f2fs_sb_info *, pgoff_t);
1849bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
1850int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int, bool);
1851void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
1852long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
1853void add_ino_entry(struct f2fs_sb_info *, nid_t, int type);
1854void remove_ino_entry(struct f2fs_sb_info *, nid_t, int type);
1855void release_ino_entry(struct f2fs_sb_info *);
1856bool exist_written_data(struct f2fs_sb_info *, nid_t, int);
1857int acquire_orphan_inode(struct f2fs_sb_info *);
1858void release_orphan_inode(struct f2fs_sb_info *);
1859void add_orphan_inode(struct f2fs_sb_info *, nid_t);
1860void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
1861int recover_orphan_inodes(struct f2fs_sb_info *);
1862int get_valid_checkpoint(struct f2fs_sb_info *);
1863void update_dirty_page(struct inode *, struct page *);
1864void add_dirty_dir_inode(struct inode *);
1865void remove_dirty_inode(struct inode *);
1866int sync_dirty_inodes(struct f2fs_sb_info *, enum inode_type);
1867int write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
1868void init_ino_entry_info(struct f2fs_sb_info *);
1869int __init create_checkpoint_caches(void);
1870void destroy_checkpoint_caches(void);
1871
1872/*
1873 * data.c
1874 */
1875void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
1876void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *, struct inode *,
1877 struct page *, nid_t, enum page_type, int);
1878void f2fs_flush_merged_bios(struct f2fs_sb_info *);
1879int f2fs_submit_page_bio(struct f2fs_io_info *);
1880void f2fs_submit_page_mbio(struct f2fs_io_info *);
1881void set_data_blkaddr(struct dnode_of_data *);
1882void f2fs_update_data_blkaddr(struct dnode_of_data *, block_t);
1883int reserve_new_block(struct dnode_of_data *);
1884int f2fs_get_block(struct dnode_of_data *, pgoff_t);
1885ssize_t f2fs_preallocate_blocks(struct kiocb *, struct iov_iter *);
1886int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
1887struct page *get_read_data_page(struct inode *, pgoff_t, int, bool);
1888struct page *find_data_page(struct inode *, pgoff_t);
1889struct page *get_lock_data_page(struct inode *, pgoff_t, bool);
1890struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
1891int do_write_data_page(struct f2fs_io_info *);
1892int f2fs_map_blocks(struct inode *, struct f2fs_map_blocks *, int, int);
1893int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
1894void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
1895int f2fs_release_page(struct page *, gfp_t);
1896
1897/*
1898 * gc.c
1899 */
1900int start_gc_thread(struct f2fs_sb_info *);
1901void stop_gc_thread(struct f2fs_sb_info *);
1902block_t start_bidx_of_node(unsigned int, struct inode *);
1903int f2fs_gc(struct f2fs_sb_info *, bool);
1904void build_gc_manager(struct f2fs_sb_info *);
1905
1906/*
1907 * recovery.c
1908 */
1909int recover_fsync_data(struct f2fs_sb_info *);
1910bool space_for_roll_forward(struct f2fs_sb_info *);
1911
1912/*
1913 * debug.c
1914 */
1915#ifdef CONFIG_F2FS_STAT_FS
1916struct f2fs_stat_info {
1917 struct list_head stat_list;
1918 struct f2fs_sb_info *sbi;
1919 int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
1920 int main_area_segs, main_area_sections, main_area_zones;
1921 unsigned long long hit_largest, hit_cached, hit_rbtree;
1922 unsigned long long hit_total, total_ext;
1923 int ext_tree, zombie_tree, ext_node;
1924 int ndirty_node, ndirty_meta;
1925 int ndirty_dent, ndirty_dirs, ndirty_data, ndirty_files;
1926 int nats, dirty_nats, sits, dirty_sits, fnids;
1927 int total_count, utilization;
1928 int bg_gc, inmem_pages, wb_pages;
1929 int inline_xattr, inline_inode, inline_dir;
1930 unsigned int valid_count, valid_node_count, valid_inode_count;
1931 unsigned int bimodal, avg_vblocks;
1932 int util_free, util_valid, util_invalid;
1933 int rsvd_segs, overp_segs;
1934 int dirty_count, node_pages, meta_pages;
1935 int prefree_count, call_count, cp_count, bg_cp_count;
1936 int tot_segs, node_segs, data_segs, free_segs, free_secs;
1937 int bg_node_segs, bg_data_segs;
1938 int tot_blks, data_blks, node_blks;
1939 int bg_data_blks, bg_node_blks;
1940 int curseg[NR_CURSEG_TYPE];
1941 int cursec[NR_CURSEG_TYPE];
1942 int curzone[NR_CURSEG_TYPE];
1943
1944 unsigned int segment_count[2];
1945 unsigned int block_count[2];
1946 unsigned int inplace_count;
1947 unsigned long long base_mem, cache_mem, page_mem;
1948};
1949
1950static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
1951{
1952 return (struct f2fs_stat_info *)sbi->stat_info;
1953}
1954
1955#define stat_inc_cp_count(si) ((si)->cp_count++)
1956#define stat_inc_bg_cp_count(si) ((si)->bg_cp_count++)
1957#define stat_inc_call_count(si) ((si)->call_count++)
1958#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
1959#define stat_inc_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]++)
1960#define stat_dec_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]--)
1961#define stat_inc_total_hit(sbi) (atomic64_inc(&(sbi)->total_hit_ext))
1962#define stat_inc_rbtree_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_rbtree))
1963#define stat_inc_largest_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_largest))
1964#define stat_inc_cached_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_cached))
1965#define stat_inc_inline_xattr(inode) \
1966 do { \
1967 if (f2fs_has_inline_xattr(inode)) \
1968 (atomic_inc(&F2FS_I_SB(inode)->inline_xattr)); \
1969 } while (0)
1970#define stat_dec_inline_xattr(inode) \
1971 do { \
1972 if (f2fs_has_inline_xattr(inode)) \
1973 (atomic_dec(&F2FS_I_SB(inode)->inline_xattr)); \
1974 } while (0)
1975#define stat_inc_inline_inode(inode) \
1976 do { \
1977 if (f2fs_has_inline_data(inode)) \
1978 (atomic_inc(&F2FS_I_SB(inode)->inline_inode)); \
1979 } while (0)
1980#define stat_dec_inline_inode(inode) \
1981 do { \
1982 if (f2fs_has_inline_data(inode)) \
1983 (atomic_dec(&F2FS_I_SB(inode)->inline_inode)); \
1984 } while (0)
1985#define stat_inc_inline_dir(inode) \
1986 do { \
1987 if (f2fs_has_inline_dentry(inode)) \
1988 (atomic_inc(&F2FS_I_SB(inode)->inline_dir)); \
1989 } while (0)
1990#define stat_dec_inline_dir(inode) \
1991 do { \
1992 if (f2fs_has_inline_dentry(inode)) \
1993 (atomic_dec(&F2FS_I_SB(inode)->inline_dir)); \
1994 } while (0)
1995#define stat_inc_seg_type(sbi, curseg) \
1996 ((sbi)->segment_count[(curseg)->alloc_type]++)
1997#define stat_inc_block_count(sbi, curseg) \
1998 ((sbi)->block_count[(curseg)->alloc_type]++)
1999#define stat_inc_inplace_blocks(sbi) \
2000 (atomic_inc(&(sbi)->inplace_count))
2001#define stat_inc_seg_count(sbi, type, gc_type) \
2002 do { \
2003 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
2004 (si)->tot_segs++; \
2005 if (type == SUM_TYPE_DATA) { \
2006 si->data_segs++; \
2007 si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0; \
2008 } else { \
2009 si->node_segs++; \
2010 si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0; \
2011 } \
2012 } while (0)
2013
2014#define stat_inc_tot_blk_count(si, blks) \
2015 (si->tot_blks += (blks))
2016
2017#define stat_inc_data_blk_count(sbi, blks, gc_type) \
2018 do { \
2019 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
2020 stat_inc_tot_blk_count(si, blks); \
2021 si->data_blks += (blks); \
2022 si->bg_data_blks += (gc_type == BG_GC) ? (blks) : 0; \
2023 } while (0)
2024
2025#define stat_inc_node_blk_count(sbi, blks, gc_type) \
2026 do { \
2027 struct f2fs_stat_info *si = F2FS_STAT(sbi); \
2028 stat_inc_tot_blk_count(si, blks); \
2029 si->node_blks += (blks); \
2030 si->bg_node_blks += (gc_type == BG_GC) ? (blks) : 0; \
2031 } while (0)
2032
2033int f2fs_build_stats(struct f2fs_sb_info *);
2034void f2fs_destroy_stats(struct f2fs_sb_info *);
2035int __init f2fs_create_root_stats(void);
2036void f2fs_destroy_root_stats(void);
2037#else
2038#define stat_inc_cp_count(si)
2039#define stat_inc_bg_cp_count(si)
2040#define stat_inc_call_count(si)
2041#define stat_inc_bggc_count(si)
2042#define stat_inc_dirty_inode(sbi, type)
2043#define stat_dec_dirty_inode(sbi, type)
2044#define stat_inc_total_hit(sb)
2045#define stat_inc_rbtree_node_hit(sb)
2046#define stat_inc_largest_node_hit(sbi)
2047#define stat_inc_cached_node_hit(sbi)
2048#define stat_inc_inline_xattr(inode)
2049#define stat_dec_inline_xattr(inode)
2050#define stat_inc_inline_inode(inode)
2051#define stat_dec_inline_inode(inode)
2052#define stat_inc_inline_dir(inode)
2053#define stat_dec_inline_dir(inode)
2054#define stat_inc_seg_type(sbi, curseg)
2055#define stat_inc_block_count(sbi, curseg)
2056#define stat_inc_inplace_blocks(sbi)
2057#define stat_inc_seg_count(sbi, type, gc_type)
2058#define stat_inc_tot_blk_count(si, blks)
2059#define stat_inc_data_blk_count(sbi, blks, gc_type)
2060#define stat_inc_node_blk_count(sbi, blks, gc_type)
2061
2062static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
2063static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
2064static inline int __init f2fs_create_root_stats(void) { return 0; }
2065static inline void f2fs_destroy_root_stats(void) { }
2066#endif
2067
2068extern const struct file_operations f2fs_dir_operations;
2069extern const struct file_operations f2fs_file_operations;
2070extern const struct inode_operations f2fs_file_inode_operations;
2071extern const struct address_space_operations f2fs_dblock_aops;
2072extern const struct address_space_operations f2fs_node_aops;
2073extern const struct address_space_operations f2fs_meta_aops;
2074extern const struct inode_operations f2fs_dir_inode_operations;
2075extern const struct inode_operations f2fs_symlink_inode_operations;
2076extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
2077extern const struct inode_operations f2fs_special_inode_operations;
2078extern struct kmem_cache *inode_entry_slab;
2079
2080/*
2081 * inline.c
2082 */
2083bool f2fs_may_inline_data(struct inode *);
2084bool f2fs_may_inline_dentry(struct inode *);
2085void read_inline_data(struct page *, struct page *);
2086bool truncate_inline_inode(struct page *, u64);
2087int f2fs_read_inline_data(struct inode *, struct page *);
2088int f2fs_convert_inline_page(struct dnode_of_data *, struct page *);
2089int f2fs_convert_inline_inode(struct inode *);
2090int f2fs_write_inline_data(struct inode *, struct page *);
2091bool recover_inline_data(struct inode *, struct page *);
2092struct f2fs_dir_entry *find_in_inline_dir(struct inode *,
2093 struct fscrypt_name *, struct page **);
2094struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *, struct page **);
2095int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *);
2096int f2fs_add_inline_entry(struct inode *, const struct qstr *, struct inode *,
2097 nid_t, umode_t);
2098void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *,
2099 struct inode *, struct inode *);
2100bool f2fs_empty_inline_dir(struct inode *);
2101int f2fs_read_inline_dir(struct file *, struct dir_context *,
2102 struct fscrypt_str *);
2103int f2fs_inline_data_fiemap(struct inode *,
2104 struct fiemap_extent_info *, __u64, __u64);
2105
2106/*
2107 * shrinker.c
2108 */
2109unsigned long f2fs_shrink_count(struct shrinker *, struct shrink_control *);
2110unsigned long f2fs_shrink_scan(struct shrinker *, struct shrink_control *);
2111void f2fs_join_shrinker(struct f2fs_sb_info *);
2112void f2fs_leave_shrinker(struct f2fs_sb_info *);
2113
2114/*
2115 * extent_cache.c
2116 */
2117unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
2118bool f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
2119unsigned int f2fs_destroy_extent_node(struct inode *);
2120void f2fs_destroy_extent_tree(struct inode *);
2121bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *);
2122void f2fs_update_extent_cache(struct dnode_of_data *);
2123void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
2124 pgoff_t, block_t, unsigned int);
2125void init_extent_cache_info(struct f2fs_sb_info *);
2126int __init create_extent_cache(void);
2127void destroy_extent_cache(void);
2128
2129/*
2130 * crypto support
2131 */
2132static inline bool f2fs_encrypted_inode(struct inode *inode)
2133{
2134 return file_is_encrypt(inode);
2135}
2136
2137static inline void f2fs_set_encrypted_inode(struct inode *inode)
2138{
2139#ifdef CONFIG_F2FS_FS_ENCRYPTION
2140 file_set_encrypt(inode);
2141#endif
2142}
2143
2144static inline bool f2fs_bio_encrypted(struct bio *bio)
2145{
2146 return bio->bi_private != NULL;
2147}
2148
2149static inline int f2fs_sb_has_crypto(struct super_block *sb)
2150{
2151 return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT);
2152}
2153
2154static inline bool f2fs_may_encrypt(struct inode *inode)
2155{
2156#ifdef CONFIG_F2FS_FS_ENCRYPTION
2157 umode_t mode = inode->i_mode;
2158
2159 return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
2160#else
2161 return 0;
2162#endif
2163}
2164
2165#ifndef CONFIG_F2FS_FS_ENCRYPTION
2166#define fscrypt_set_d_op(i)
2167#define fscrypt_get_ctx fscrypt_notsupp_get_ctx
2168#define fscrypt_release_ctx fscrypt_notsupp_release_ctx
2169#define fscrypt_encrypt_page fscrypt_notsupp_encrypt_page
2170#define fscrypt_decrypt_page fscrypt_notsupp_decrypt_page
2171#define fscrypt_decrypt_bio_pages fscrypt_notsupp_decrypt_bio_pages
2172#define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page
2173#define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page
2174#define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range
2175#define fscrypt_process_policy fscrypt_notsupp_process_policy
2176#define fscrypt_get_policy fscrypt_notsupp_get_policy
2177#define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context
2178#define fscrypt_inherit_context fscrypt_notsupp_inherit_context
2179#define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info
2180#define fscrypt_put_encryption_info fscrypt_notsupp_put_encryption_info
2181#define fscrypt_setup_filename fscrypt_notsupp_setup_filename
2182#define fscrypt_free_filename fscrypt_notsupp_free_filename
2183#define fscrypt_fname_encrypted_size fscrypt_notsupp_fname_encrypted_size
2184#define fscrypt_fname_alloc_buffer fscrypt_notsupp_fname_alloc_buffer
2185#define fscrypt_fname_free_buffer fscrypt_notsupp_fname_free_buffer
2186#define fscrypt_fname_disk_to_usr fscrypt_notsupp_fname_disk_to_usr
2187#define fscrypt_fname_usr_to_disk fscrypt_notsupp_fname_usr_to_disk
2188#endif
2189#endif