1	/* SPDX-License-Identifier: GPL-2.0 */
2	/*
3	* fs/f2fs/f2fs.h
4	*
5	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
6	* http://www.samsung.com/
7	*/
8	#ifndef _LINUX_F2FS_H
9	#define _LINUX_F2FS_H
10
11	#include <linux/uio.h>
12	#include <linux/types.h>
13	#include <linux/page-flags.h>
14	#include <linux/buffer_head.h>
15	#include <linux/slab.h>
16	#include <linux/crc32.h>
17	#include <linux/magic.h>
18	#include <linux/kobject.h>
19	#include <linux/sched.h>
20	#include <linux/cred.h>
21	#include <linux/sched/mm.h>
22	#include <linux/vmalloc.h>
23	#include <linux/bio.h>
24	#include <linux/blkdev.h>
25	#include <linux/quotaops.h>
26	#include <linux/part_stat.h>
27	#include <crypto/hash.h>
28
29	#include <linux/fscrypt.h>
30	#include <linux/fsverity.h>
31
32	struct pagevec;
33
34	#ifdef CONFIG_F2FS_CHECK_FS
35	#define f2fs_bug_on(sbi, condition) BUG_ON(condition)
36	#else
37	#define f2fs_bug_on(sbi, condition) \
38	do { \
39	if (WARN_ON(condition)) \
40	set_sbi_flag(sbi, SBI_NEED_FSCK); \
41	} while (0)
42	#endif
43
44	enum {
45	FAULT_KMALLOC,
46	FAULT_KVMALLOC,
47	FAULT_PAGE_ALLOC,
48	FAULT_PAGE_GET,
49	FAULT_ALLOC_BIO, /* it's obsolete due to bio_alloc() will never fail */
50	FAULT_ALLOC_NID,
51	FAULT_ORPHAN,
52	FAULT_BLOCK,
53	FAULT_DIR_DEPTH,
54	FAULT_EVICT_INODE,
55	FAULT_TRUNCATE,
56	FAULT_READ_IO,
57	FAULT_CHECKPOINT,
58	FAULT_DISCARD,
59	FAULT_WRITE_IO,
60	FAULT_SLAB_ALLOC,
61	FAULT_DQUOT_INIT,
62	FAULT_LOCK_OP,
63	FAULT_BLKADDR,
64	FAULT_MAX,
65	};
66
67	#ifdef CONFIG_F2FS_FAULT_INJECTION
68	#define F2FS_ALL_FAULT_TYPE (GENMASK(FAULT_MAX - 1, 0))
69
70	struct f2fs_fault_info {
71	atomic_t inject_ops;
72	unsigned int inject_rate;
73	unsigned int inject_type;
74	};
75
76	extern const char *f2fs_fault_name[FAULT_MAX];
77	#define IS_FAULT_SET(fi, type) ((fi)->inject_type & BIT(type))
78	#endif
79
80	/*
81	* For mount options
82	*/
83	#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000001
84	#define F2FS_MOUNT_DISCARD 0x00000002
85	#define F2FS_MOUNT_NOHEAP 0x00000004
86	#define F2FS_MOUNT_XATTR_USER 0x00000008
87	#define F2FS_MOUNT_POSIX_ACL 0x00000010
88	#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000020
89	#define F2FS_MOUNT_INLINE_XATTR 0x00000040
90	#define F2FS_MOUNT_INLINE_DATA 0x00000080
91	#define F2FS_MOUNT_INLINE_DENTRY 0x00000100
92	#define F2FS_MOUNT_FLUSH_MERGE 0x00000200
93	#define F2FS_MOUNT_NOBARRIER 0x00000400
94	#define F2FS_MOUNT_FASTBOOT 0x00000800
95	#define F2FS_MOUNT_READ_EXTENT_CACHE 0x00001000
96	#define F2FS_MOUNT_DATA_FLUSH 0x00002000
97	#define F2FS_MOUNT_FAULT_INJECTION 0x00004000
98	#define F2FS_MOUNT_USRQUOTA 0x00008000
99	#define F2FS_MOUNT_GRPQUOTA 0x00010000
100	#define F2FS_MOUNT_PRJQUOTA 0x00020000
101	#define F2FS_MOUNT_QUOTA 0x00040000
102	#define F2FS_MOUNT_INLINE_XATTR_SIZE 0x00080000
103	#define F2FS_MOUNT_RESERVE_ROOT 0x00100000
104	#define F2FS_MOUNT_DISABLE_CHECKPOINT 0x00200000
105	#define F2FS_MOUNT_NORECOVERY 0x00400000
106	#define F2FS_MOUNT_ATGC 0x00800000
107	#define F2FS_MOUNT_MERGE_CHECKPOINT 0x01000000
108	#define F2FS_MOUNT_GC_MERGE 0x02000000
109	#define F2FS_MOUNT_COMPRESS_CACHE 0x04000000
110	#define F2FS_MOUNT_AGE_EXTENT_CACHE 0x08000000
111
112	#define F2FS_OPTION(sbi) ((sbi)->mount_opt)
113	#define clear_opt(sbi, option) (F2FS_OPTION(sbi).opt &= ~F2FS_MOUNT_##option)
114	#define set_opt(sbi, option) (F2FS_OPTION(sbi).opt |= F2FS_MOUNT_##option)
115	#define test_opt(sbi, option) (F2FS_OPTION(sbi).opt & F2FS_MOUNT_##option)
116
117	#define ver_after(a, b) (typecheck(unsigned long long, a) && \
118	typecheck(unsigned long long, b) && \
119	((long long)((a) - (b)) > 0))
120
121	typedef u32 block_t; /*
122	* should not change u32, since it is the on-disk block
123	* address format, __le32.
124	*/
125	typedef u32 nid_t;
126
127	#define COMPRESS_EXT_NUM 16
128
129	/*
130	* An implementation of an rwsem that is explicitly unfair to readers. This
131	* prevents priority inversion when a low-priority reader acquires the read lock
132	* while sleeping on the write lock but the write lock is needed by
133	* higher-priority clients.
134	*/
135
136	struct f2fs_rwsem {
137	struct rw_semaphore internal_rwsem;
138	#ifdef CONFIG_F2FS_UNFAIR_RWSEM
139	wait_queue_head_t read_waiters;
140	#endif
141	};
142
143	struct f2fs_mount_info {
144	unsigned int opt;
145	int write_io_size_bits; /* Write IO size bits */
146	block_t root_reserved_blocks; /* root reserved blocks */
147	kuid_t s_resuid; /* reserved blocks for uid */
148	kgid_t s_resgid; /* reserved blocks for gid */
149	int active_logs; /* # of active logs */
150	int inline_xattr_size; /* inline xattr size */
151	#ifdef CONFIG_F2FS_FAULT_INJECTION
152	struct f2fs_fault_info fault_info; /* For fault injection */
153	#endif
154	#ifdef CONFIG_QUOTA
155	/* Names of quota files with journalled quota */
156	char *s_qf_names[MAXQUOTAS];
157	int s_jquota_fmt; /* Format of quota to use */
158	#endif
159	/* For which write hints are passed down to block layer */
160	int alloc_mode; /* segment allocation policy */
161	int fsync_mode; /* fsync policy */
162	int fs_mode; /* fs mode: LFS or ADAPTIVE */
163	int bggc_mode; /* bggc mode: off, on or sync */
164	int memory_mode; /* memory mode */
165	int errors; /* errors parameter */
166	int discard_unit; /*
167	* discard command's offset/size should
168	* be aligned to this unit: block,
169	* segment or section
170	*/
171	struct fscrypt_dummy_policy dummy_enc_policy; /* test dummy encryption */
172	block_t unusable_cap_perc; /* percentage for cap */
173	block_t unusable_cap; /* Amount of space allowed to be
174	* unusable when disabling checkpoint
175	*/
176
177	/* For compression */
178	unsigned char compress_algorithm; /* algorithm type */
179	unsigned char compress_log_size; /* cluster log size */
180	unsigned char compress_level; /* compress level */
181	bool compress_chksum; /* compressed data chksum */
182	unsigned char compress_ext_cnt; /* extension count */
183	unsigned char nocompress_ext_cnt; /* nocompress extension count */
184	int compress_mode; /* compression mode */
185	unsigned char extensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */
186	unsigned char noextensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */
187	};
188
189	#define F2FS_FEATURE_ENCRYPT 0x00000001
190	#define F2FS_FEATURE_BLKZONED 0x00000002
191	#define F2FS_FEATURE_ATOMIC_WRITE 0x00000004
192	#define F2FS_FEATURE_EXTRA_ATTR 0x00000008
193	#define F2FS_FEATURE_PRJQUOTA 0x00000010
194	#define F2FS_FEATURE_INODE_CHKSUM 0x00000020
195	#define F2FS_FEATURE_FLEXIBLE_INLINE_XATTR 0x00000040
196	#define F2FS_FEATURE_QUOTA_INO 0x00000080
197	#define F2FS_FEATURE_INODE_CRTIME 0x00000100
198	#define F2FS_FEATURE_LOST_FOUND 0x00000200
199	#define F2FS_FEATURE_VERITY 0x00000400
200	#define F2FS_FEATURE_SB_CHKSUM 0x00000800
201	#define F2FS_FEATURE_CASEFOLD 0x00001000
202	#define F2FS_FEATURE_COMPRESSION 0x00002000
203	#define F2FS_FEATURE_RO 0x00004000
204
205	#define __F2FS_HAS_FEATURE(raw_super, mask) \
206	((raw_super->feature & cpu_to_le32(mask)) != 0)
207	#define F2FS_HAS_FEATURE(sbi, mask) __F2FS_HAS_FEATURE(sbi->raw_super, mask)
208
209	/*
210	* Default values for user and/or group using reserved blocks
211	*/
212	#define F2FS_DEF_RESUID 0
213	#define F2FS_DEF_RESGID 0
214
215	/*
216	* For checkpoint manager
217	*/
218	enum {
219	NAT_BITMAP,
220	SIT_BITMAP
221	};
222
223	#define CP_UMOUNT 0x00000001
224	#define CP_FASTBOOT 0x00000002
225	#define CP_SYNC 0x00000004
226	#define CP_RECOVERY 0x00000008
227	#define CP_DISCARD 0x00000010
228	#define CP_TRIMMED 0x00000020
229	#define CP_PAUSE 0x00000040
230	#define CP_RESIZE 0x00000080
231
232	#define DEF_MAX_DISCARD_REQUEST 8 /* issue 8 discards per round */
233	#define DEF_MIN_DISCARD_ISSUE_TIME 50 /* 50 ms, if exists */
234	#define DEF_MID_DISCARD_ISSUE_TIME 500 /* 500 ms, if device busy */
235	#define DEF_MAX_DISCARD_ISSUE_TIME 60000 /* 60 s, if no candidates */
236	#define DEF_DISCARD_URGENT_UTIL 80 /* do more discard over 80% */
237	#define DEF_CP_INTERVAL 60 /* 60 secs */
238	#define DEF_IDLE_INTERVAL 5 /* 5 secs */
239	#define DEF_DISABLE_INTERVAL 5 /* 5 secs */
240	#define DEF_DISABLE_QUICK_INTERVAL 1 /* 1 secs */
241	#define DEF_UMOUNT_DISCARD_TIMEOUT 5 /* 5 secs */
242
243	struct cp_control {
244	int reason;
245	__u64 trim_start;
246	__u64 trim_end;
247	__u64 trim_minlen;
248	};
249
250	/*
251	* indicate meta/data type
252	*/
253	enum {
254	META_CP,
255	META_NAT,
256	META_SIT,
257	META_SSA,
258	META_MAX,
259	META_POR,
260	DATA_GENERIC, /* check range only */
261	DATA_GENERIC_ENHANCE, /* strong check on range and segment bitmap */
262	DATA_GENERIC_ENHANCE_READ, /*
263	* strong check on range and segment
264	* bitmap but no warning due to race
265	* condition of read on truncated area
266	* by extent_cache
267	*/
268	DATA_GENERIC_ENHANCE_UPDATE, /*
269	* strong check on range and segment
270	* bitmap for update case
271	*/
272	META_GENERIC,
273	};
274
275	/* for the list of ino */
276	enum {
277	ORPHAN_INO, /* for orphan ino list */
278	APPEND_INO, /* for append ino list */
279	UPDATE_INO, /* for update ino list */
280	TRANS_DIR_INO, /* for transactions dir ino list */
281	FLUSH_INO, /* for multiple device flushing */
282	MAX_INO_ENTRY, /* max. list */
283	};
284
285	struct ino_entry {
286	struct list_head list; /* list head */
287	nid_t ino; /* inode number */
288	unsigned int dirty_device; /* dirty device bitmap */
289	};
290
291	/* for the list of inodes to be GCed */
292	struct inode_entry {
293	struct list_head list; /* list head */
294	struct inode *inode; /* vfs inode pointer */
295	};
296
297	struct fsync_node_entry {
298	struct list_head list; /* list head */
299	struct page *page; /* warm node page pointer */
300	unsigned int seq_id; /* sequence id */
301	};
302
303	struct ckpt_req {
304	struct completion wait; /* completion for checkpoint done */
305	struct llist_node llnode; /* llist_node to be linked in wait queue */
306	int ret; /* return code of checkpoint */
307	ktime_t queue_time; /* request queued time */
308	};
309
310	struct ckpt_req_control {
311	struct task_struct *f2fs_issue_ckpt; /* checkpoint task */
312	int ckpt_thread_ioprio; /* checkpoint merge thread ioprio */
313	wait_queue_head_t ckpt_wait_queue; /* waiting queue for wake-up */
314	atomic_t issued_ckpt; /* # of actually issued ckpts */
315	atomic_t total_ckpt; /* # of total ckpts */
316	atomic_t queued_ckpt; /* # of queued ckpts */
317	struct llist_head issue_list; /* list for command issue */
318	spinlock_t stat_lock; /* lock for below checkpoint time stats */
319	unsigned int cur_time; /* cur wait time in msec for currently issued checkpoint */
320	unsigned int peak_time; /* peak wait time in msec until now */
321	};
322
323	/* for the bitmap indicate blocks to be discarded */
324	struct discard_entry {
325	struct list_head list; /* list head */
326	block_t start_blkaddr; /* start blockaddr of current segment */
327	unsigned char discard_map[SIT_VBLOCK_MAP_SIZE]; /* segment discard bitmap */
328	};
329
330	/* minimum discard granularity, unit: block count */
331	#define MIN_DISCARD_GRANULARITY 1
332	/* default discard granularity of inner discard thread, unit: block count */
333	#define DEFAULT_DISCARD_GRANULARITY 16
334	/* default maximum discard granularity of ordered discard, unit: block count */
335	#define DEFAULT_MAX_ORDERED_DISCARD_GRANULARITY 16
336
337	/* max discard pend list number */
338	#define MAX_PLIST_NUM 512
339	#define plist_idx(blk_num) ((blk_num) >= MAX_PLIST_NUM ? \
340	(MAX_PLIST_NUM - 1) : ((blk_num) - 1))
341
342	enum {
343	D_PREP, /* initial */
344	D_PARTIAL, /* partially submitted */
345	D_SUBMIT, /* all submitted */
346	D_DONE, /* finished */
347	};
348
349	struct discard_info {
350	block_t lstart; /* logical start address */
351	block_t len; /* length */
352	block_t start; /* actual start address in dev */
353	};
354
355	struct discard_cmd {
356	struct rb_node rb_node; /* rb node located in rb-tree */
357	struct discard_info di; /* discard info */
358	struct list_head list; /* command list */
359	struct completion wait; /* compleation */
360	struct block_device *bdev; /* bdev */
361	unsigned short ref; /* reference count */
362	unsigned char state; /* state */
363	unsigned char queued; /* queued discard */
364	int error; /* bio error */
365	spinlock_t lock; /* for state/bio_ref updating */
366	unsigned short bio_ref; /* bio reference count */
367	};
368
369	enum {
370	DPOLICY_BG,
371	DPOLICY_FORCE,
372	DPOLICY_FSTRIM,
373	DPOLICY_UMOUNT,
374	MAX_DPOLICY,
375	};
376
377	struct discard_policy {
378	int type; /* type of discard */
379	unsigned int min_interval; /* used for candidates exist */
380	unsigned int mid_interval; /* used for device busy */
381	unsigned int max_interval; /* used for candidates not exist */
382	unsigned int max_requests; /* # of discards issued per round */
383	unsigned int io_aware_gran; /* minimum granularity discard not be aware of I/O */
384	bool io_aware; /* issue discard in idle time */
385	bool sync; /* submit discard with REQ_SYNC flag */
386	bool ordered; /* issue discard by lba order */
387	bool timeout; /* discard timeout for put_super */
388	unsigned int granularity; /* discard granularity */
389	};
390
391	struct discard_cmd_control {
392	struct task_struct *f2fs_issue_discard; /* discard thread */
393	struct list_head entry_list; /* 4KB discard entry list */
394	struct list_head pend_list[MAX_PLIST_NUM];/* store pending entries */
395	struct list_head wait_list; /* store on-flushing entries */
396	struct list_head fstrim_list; /* in-flight discard from fstrim */
397	wait_queue_head_t discard_wait_queue; /* waiting queue for wake-up */
398	struct mutex cmd_lock;
399	unsigned int nr_discards; /* # of discards in the list */
400	unsigned int max_discards; /* max. discards to be issued */
401	unsigned int max_discard_request; /* max. discard request per round */
402	unsigned int min_discard_issue_time; /* min. interval between discard issue */
403	unsigned int mid_discard_issue_time; /* mid. interval between discard issue */
404	unsigned int max_discard_issue_time; /* max. interval between discard issue */
405	unsigned int discard_io_aware_gran; /* minimum discard granularity not be aware of I/O */
406	unsigned int discard_urgent_util; /* utilization which issue discard proactively */
407	unsigned int discard_granularity; /* discard granularity */
408	unsigned int max_ordered_discard; /* maximum discard granularity issued by lba order */
409	unsigned int undiscard_blks; /* # of undiscard blocks */
410	unsigned int next_pos; /* next discard position */
411	atomic_t issued_discard; /* # of issued discard */
412	atomic_t queued_discard; /* # of queued discard */
413	atomic_t discard_cmd_cnt; /* # of cached cmd count */
414	struct rb_root_cached root; /* root of discard rb-tree */
415	bool rbtree_check; /* config for consistence check */
416	bool discard_wake; /* to wake up discard thread */
417	};
418
419	/* for the list of fsync inodes, used only during recovery */
420	struct fsync_inode_entry {
421	struct list_head list; /* list head */
422	struct inode *inode; /* vfs inode pointer */
423	block_t blkaddr; /* block address locating the last fsync */
424	block_t last_dentry; /* block address locating the last dentry */
425	};
426
427	#define nats_in_cursum(jnl) (le16_to_cpu((jnl)->n_nats))
428	#define sits_in_cursum(jnl) (le16_to_cpu((jnl)->n_sits))
429
430	#define nat_in_journal(jnl, i) ((jnl)->nat_j.entries[i].ne)
431	#define nid_in_journal(jnl, i) ((jnl)->nat_j.entries[i].nid)
432	#define sit_in_journal(jnl, i) ((jnl)->sit_j.entries[i].se)
433	#define segno_in_journal(jnl, i) ((jnl)->sit_j.entries[i].segno)
434
435	#define MAX_NAT_JENTRIES(jnl) (NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
436	#define MAX_SIT_JENTRIES(jnl) (SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
437
438	static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
439	{
440	int before = nats_in_cursum(journal);
441
442	journal->n_nats = cpu_to_le16(before + i);
443	return before;
444	}
445
446	static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
447	{
448	int before = sits_in_cursum(journal);
449
450	journal->n_sits = cpu_to_le16(before + i);
451	return before;
452	}
453
454	static inline bool __has_cursum_space(struct f2fs_journal *journal,
455	int size, int type)
456	{
457	if (type == NAT_JOURNAL)
458	return size <= MAX_NAT_JENTRIES(journal);
459	return size <= MAX_SIT_JENTRIES(journal);
460	}
461
462	/* for inline stuff */
463	#define DEF_INLINE_RESERVED_SIZE 1
464	static inline int get_extra_isize(struct inode *inode);
465	static inline int get_inline_xattr_addrs(struct inode *inode);
466	#define MAX_INLINE_DATA(inode) (sizeof(__le32) * \
467	(CUR_ADDRS_PER_INODE(inode) - \
468	get_inline_xattr_addrs(inode) - \
469	DEF_INLINE_RESERVED_SIZE))
470
471	/* for inline dir */
472	#define NR_INLINE_DENTRY(inode) (MAX_INLINE_DATA(inode) * BITS_PER_BYTE / \
473	((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
474	BITS_PER_BYTE + 1))
475	#define INLINE_DENTRY_BITMAP_SIZE(inode) \
476	DIV_ROUND_UP(NR_INLINE_DENTRY(inode), BITS_PER_BYTE)
477	#define INLINE_RESERVED_SIZE(inode) (MAX_INLINE_DATA(inode) - \
478	((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
479	NR_INLINE_DENTRY(inode) + \
480	INLINE_DENTRY_BITMAP_SIZE(inode)))
481
482	/*
483	* For INODE and NODE manager
484	*/
485	/* for directory operations */
486
487	struct f2fs_filename {
488	/*
489	* The filename the user specified. This is NULL for some
490	* filesystem-internal operations, e.g. converting an inline directory
491	* to a non-inline one, or roll-forward recovering an encrypted dentry.
492	*/
493	const struct qstr *usr_fname;
494
495	/*
496	* The on-disk filename. For encrypted directories, this is encrypted.
497	* This may be NULL for lookups in an encrypted dir without the key.
498	*/
499	struct fscrypt_str disk_name;
500
501	/* The dirhash of this filename */
502	f2fs_hash_t hash;
503
504	#ifdef CONFIG_FS_ENCRYPTION
505	/*
506	* For lookups in encrypted directories: either the buffer backing
507	* disk_name, or a buffer that holds the decoded no-key name.
508	*/
509	struct fscrypt_str crypto_buf;
510	#endif
511	#if IS_ENABLED(CONFIG_UNICODE)
512	/*
513	* For casefolded directories: the casefolded name, but it's left NULL
514	* if the original name is not valid Unicode, if the original name is
515	* "." or "..", if the directory is both casefolded and encrypted and
516	* its encryption key is unavailable, or if the filesystem is doing an
517	* internal operation where usr_fname is also NULL. In all these cases
518	* we fall back to treating the name as an opaque byte sequence.
519	*/
520	struct fscrypt_str cf_name;
521	#endif
522	};
523
524	struct f2fs_dentry_ptr {
525	struct inode *inode;
526	void *bitmap;
527	struct f2fs_dir_entry *dentry;
528	__u8 (*filename)[F2FS_SLOT_LEN];
529	int max;
530	int nr_bitmap;
531	};
532
533	static inline void make_dentry_ptr_block(struct inode *inode,
534	struct f2fs_dentry_ptr *d, struct f2fs_dentry_block *t)
535	{
536	d->inode = inode;
537	d->max = NR_DENTRY_IN_BLOCK;
538	d->nr_bitmap = SIZE_OF_DENTRY_BITMAP;
539	d->bitmap = t->dentry_bitmap;
540	d->dentry = t->dentry;
541	d->filename = t->filename;
542	}
543
544	static inline void make_dentry_ptr_inline(struct inode *inode,
545	struct f2fs_dentry_ptr *d, void *t)
546	{
547	int entry_cnt = NR_INLINE_DENTRY(inode);
548	int bitmap_size = INLINE_DENTRY_BITMAP_SIZE(inode);
549	int reserved_size = INLINE_RESERVED_SIZE(inode);
550
551	d->inode = inode;
552	d->max = entry_cnt;
553	d->nr_bitmap = bitmap_size;
554	d->bitmap = t;
555	d->dentry = t + bitmap_size + reserved_size;
556	d->filename = t + bitmap_size + reserved_size +
557	SIZE_OF_DIR_ENTRY * entry_cnt;
558	}
559
560	/*
561	* XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
562	* as its node offset to distinguish from index node blocks.
563	* But some bits are used to mark the node block.
564	*/
565	#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
566	>> OFFSET_BIT_SHIFT)
567	enum {
568	ALLOC_NODE, /* allocate a new node page if needed */
569	LOOKUP_NODE, /* look up a node without readahead */
570	LOOKUP_NODE_RA, /*
571	* look up a node with readahead called
572	* by get_data_block.
573	*/
574	};
575
576	#define DEFAULT_RETRY_IO_COUNT 8 /* maximum retry read IO or flush count */
577
578	/* congestion wait timeout value, default: 20ms */
579	#define DEFAULT_IO_TIMEOUT (msecs_to_jiffies(20))
580
581	/* maximum retry quota flush count */
582	#define DEFAULT_RETRY_QUOTA_FLUSH_COUNT 8
583
584	/* maximum retry of EIO'ed page */
585	#define MAX_RETRY_PAGE_EIO 100
586
587	#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
588
589	#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
590
591	/* dirty segments threshold for triggering CP */
592	#define DEFAULT_DIRTY_THRESHOLD 4
593
594	#define RECOVERY_MAX_RA_BLOCKS BIO_MAX_VECS
595	#define RECOVERY_MIN_RA_BLOCKS 1
596
597	#define F2FS_ONSTACK_PAGES 16 /* nr of onstack pages */
598
599	/* for in-memory extent cache entry */
600	#define F2FS_MIN_EXTENT_LEN 64 /* minimum extent length */
601
602	/* number of extent info in extent cache we try to shrink */
603	#define READ_EXTENT_CACHE_SHRINK_NUMBER 128
604
605	/* number of age extent info in extent cache we try to shrink */
606	#define AGE_EXTENT_CACHE_SHRINK_NUMBER 128
607	#define LAST_AGE_WEIGHT 30
608	#define SAME_AGE_REGION 1024
609
610	/*
611	* Define data block with age less than 1GB as hot data
612	* define data block with age less than 10GB but more than 1GB as warm data
613	*/
614	#define DEF_HOT_DATA_AGE_THRESHOLD 262144
615	#define DEF_WARM_DATA_AGE_THRESHOLD 2621440
616
617	/* extent cache type */
618	enum extent_type {
619	EX_READ,
620	EX_BLOCK_AGE,
621	NR_EXTENT_CACHES,
622	};
623
624	struct extent_info {
625	unsigned int fofs; /* start offset in a file */
626	unsigned int len; /* length of the extent */
627	union {
628	/* read extent_cache */
629	struct {
630	/* start block address of the extent */
631	block_t blk;
632	#ifdef CONFIG_F2FS_FS_COMPRESSION
633	/* physical extent length of compressed blocks */
634	unsigned int c_len;
635	#endif
636	};
637	/* block age extent_cache */
638	struct {
639	/* block age of the extent */
640	unsigned long long age;
641	/* last total blocks allocated */
642	unsigned long long last_blocks;
643	};
644	};
645	};
646
647	struct extent_node {
648	struct rb_node rb_node; /* rb node located in rb-tree */
649	struct extent_info ei; /* extent info */
650	struct list_head list; /* node in global extent list of sbi */
651	struct extent_tree *et; /* extent tree pointer */
652	};
653
654	struct extent_tree {
655	nid_t ino; /* inode number */
656	enum extent_type type; /* keep the extent tree type */
657	struct rb_root_cached root; /* root of extent info rb-tree */
658	struct extent_node *cached_en; /* recently accessed extent node */
659	struct list_head list; /* to be used by sbi->zombie_list */
660	rwlock_t lock; /* protect extent info rb-tree */
661	atomic_t node_cnt; /* # of extent node in rb-tree*/
662	bool largest_updated; /* largest extent updated */
663	struct extent_info largest; /* largest cached extent for EX_READ */
664	};
665
666	struct extent_tree_info {
667	struct radix_tree_root extent_tree_root;/* cache extent cache entries */
668	struct mutex extent_tree_lock; /* locking extent radix tree */
669	struct list_head extent_list; /* lru list for shrinker */
670	spinlock_t extent_lock; /* locking extent lru list */
671	atomic_t total_ext_tree; /* extent tree count */
672	struct list_head zombie_list; /* extent zombie tree list */
673	atomic_t total_zombie_tree; /* extent zombie tree count */
674	atomic_t total_ext_node; /* extent info count */
675	};
676
677	/*
678	* State of block returned by f2fs_map_blocks.
679	*/
680	#define F2FS_MAP_NEW (1U << 0)
681	#define F2FS_MAP_MAPPED (1U << 1)
682	#define F2FS_MAP_DELALLOC (1U << 2)
683	#define F2FS_MAP_FLAGS (F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
684	F2FS_MAP_DELALLOC)
685
686	struct f2fs_map_blocks {
687	struct block_device *m_bdev; /* for multi-device dio */
688	block_t m_pblk;
689	block_t m_lblk;
690	unsigned int m_len;
691	unsigned int m_flags;
692	pgoff_t *m_next_pgofs; /* point next possible non-hole pgofs */
693	pgoff_t *m_next_extent; /* point to next possible extent */
694	int m_seg_type;
695	bool m_may_create; /* indicate it is from write path */
696	bool m_multidev_dio; /* indicate it allows multi-device dio */
697	};
698
699	/* for flag in get_data_block */
700	enum {
701	F2FS_GET_BLOCK_DEFAULT,
702	F2FS_GET_BLOCK_FIEMAP,
703	F2FS_GET_BLOCK_BMAP,
704	F2FS_GET_BLOCK_DIO,
705	F2FS_GET_BLOCK_PRE_DIO,
706	F2FS_GET_BLOCK_PRE_AIO,
707	F2FS_GET_BLOCK_PRECACHE,
708	};
709
710	/*
711	* i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
712	*/
713	#define FADVISE_COLD_BIT 0x01
714	#define FADVISE_LOST_PINO_BIT 0x02
715	#define FADVISE_ENCRYPT_BIT 0x04
716	#define FADVISE_ENC_NAME_BIT 0x08
717	#define FADVISE_KEEP_SIZE_BIT 0x10
718	#define FADVISE_HOT_BIT 0x20
719	#define FADVISE_VERITY_BIT 0x40
720	#define FADVISE_TRUNC_BIT 0x80
721
722	#define FADVISE_MODIFIABLE_BITS (FADVISE_COLD_BIT | FADVISE_HOT_BIT)
723
724	#define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
725	#define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
726	#define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
727
728	#define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
729	#define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
730	#define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
731
732	#define file_is_encrypt(inode) is_file(inode, FADVISE_ENCRYPT_BIT)
733	#define file_set_encrypt(inode) set_file(inode, FADVISE_ENCRYPT_BIT)
734
735	#define file_enc_name(inode) is_file(inode, FADVISE_ENC_NAME_BIT)
736	#define file_set_enc_name(inode) set_file(inode, FADVISE_ENC_NAME_BIT)
737
738	#define file_keep_isize(inode) is_file(inode, FADVISE_KEEP_SIZE_BIT)
739	#define file_set_keep_isize(inode) set_file(inode, FADVISE_KEEP_SIZE_BIT)
740
741	#define file_is_hot(inode) is_file(inode, FADVISE_HOT_BIT)
742	#define file_set_hot(inode) set_file(inode, FADVISE_HOT_BIT)
743	#define file_clear_hot(inode) clear_file(inode, FADVISE_HOT_BIT)
744
745	#define file_is_verity(inode) is_file(inode, FADVISE_VERITY_BIT)
746	#define file_set_verity(inode) set_file(inode, FADVISE_VERITY_BIT)
747
748	#define file_should_truncate(inode) is_file(inode, FADVISE_TRUNC_BIT)
749	#define file_need_truncate(inode) set_file(inode, FADVISE_TRUNC_BIT)
750	#define file_dont_truncate(inode) clear_file(inode, FADVISE_TRUNC_BIT)
751
752	#define DEF_DIR_LEVEL 0
753
754	enum {
755	GC_FAILURE_PIN,
756	MAX_GC_FAILURE
757	};
758
759	/* used for f2fs_inode_info->flags */
760	enum {
761	FI_NEW_INODE, /* indicate newly allocated inode */
762	FI_DIRTY_INODE, /* indicate inode is dirty or not */
763	FI_AUTO_RECOVER, /* indicate inode is recoverable */
764	FI_DIRTY_DIR, /* indicate directory has dirty pages */
765	FI_INC_LINK, /* need to increment i_nlink */
766	FI_ACL_MODE, /* indicate acl mode */
767	FI_NO_ALLOC, /* should not allocate any blocks */
768	FI_FREE_NID, /* free allocated nide */
769	FI_NO_EXTENT, /* not to use the extent cache */
770	FI_INLINE_XATTR, /* used for inline xattr */
771	FI_INLINE_DATA, /* used for inline data*/
772	FI_INLINE_DENTRY, /* used for inline dentry */
773	FI_APPEND_WRITE, /* inode has appended data */
774	FI_UPDATE_WRITE, /* inode has in-place-update data */
775	FI_NEED_IPU, /* used for ipu per file */
776	FI_ATOMIC_FILE, /* indicate atomic file */
777	FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
778	FI_DROP_CACHE, /* drop dirty page cache */
779	FI_DATA_EXIST, /* indicate data exists */
780	FI_INLINE_DOTS, /* indicate inline dot dentries */
781	FI_SKIP_WRITES, /* should skip data page writeback */
782	FI_OPU_WRITE, /* used for opu per file */
783	FI_DIRTY_FILE, /* indicate regular/symlink has dirty pages */
784	FI_PREALLOCATED_ALL, /* all blocks for write were preallocated */
785	FI_HOT_DATA, /* indicate file is hot */
786	FI_EXTRA_ATTR, /* indicate file has extra attribute */
787	FI_PROJ_INHERIT, /* indicate file inherits projectid */
788	FI_PIN_FILE, /* indicate file should not be gced */
789	FI_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */
790	FI_COMPRESSED_FILE, /* indicate file's data can be compressed */
791	FI_COMPRESS_CORRUPT, /* indicate compressed cluster is corrupted */
792	FI_MMAP_FILE, /* indicate file was mmapped */
793	FI_ENABLE_COMPRESS, /* enable compression in "user" compression mode */
794	FI_COMPRESS_RELEASED, /* compressed blocks were released */
795	FI_ALIGNED_WRITE, /* enable aligned write */
796	FI_COW_FILE, /* indicate COW file */
797	FI_ATOMIC_COMMITTED, /* indicate atomic commit completed except disk sync */
798	FI_ATOMIC_REPLACE, /* indicate atomic replace */
799	FI_MAX, /* max flag, never be used */
800	};
801
802	struct f2fs_inode_info {
803	struct inode vfs_inode; /* serve a vfs inode */
804	unsigned long i_flags; /* keep an inode flags for ioctl */
805	unsigned char i_advise; /* use to give file attribute hints */
806	unsigned char i_dir_level; /* use for dentry level for large dir */
807	unsigned int i_current_depth; /* only for directory depth */
808	/* for gc failure statistic */
809	unsigned int i_gc_failures[MAX_GC_FAILURE];
810	unsigned int i_pino; /* parent inode number */
811	umode_t i_acl_mode; /* keep file acl mode temporarily */
812
813	/* Use below internally in f2fs*/
814	unsigned long flags[BITS_TO_LONGS(FI_MAX)]; /* use to pass per-file flags */
815	struct f2fs_rwsem i_sem; /* protect fi info */
816	atomic_t dirty_pages; /* # of dirty pages */
817	f2fs_hash_t chash; /* hash value of given file name */
818	unsigned int clevel; /* maximum level of given file name */
819	struct task_struct *task; /* lookup and create consistency */
820	struct task_struct *cp_task; /* separate cp/wb IO stats*/
821	struct task_struct *wb_task; /* indicate inode is in context of writeback */
822	nid_t i_xattr_nid; /* node id that contains xattrs */
823	loff_t last_disk_size; /* lastly written file size */
824	spinlock_t i_size_lock; /* protect last_disk_size */
825
826	#ifdef CONFIG_QUOTA
827	struct dquot *i_dquot[MAXQUOTAS];
828
829	/* quota space reservation, managed internally by quota code */
830	qsize_t i_reserved_quota;
831	#endif
832	struct list_head dirty_list; /* dirty list for dirs and files */
833	struct list_head gdirty_list; /* linked in global dirty list */
834	struct task_struct *atomic_write_task; /* store atomic write task */
835	struct extent_tree *extent_tree[NR_EXTENT_CACHES];
836	/* cached extent_tree entry */
837	struct inode *cow_inode; /* copy-on-write inode for atomic write */
838
839	/* avoid racing between foreground op and gc */
840	struct f2fs_rwsem i_gc_rwsem[2];
841	struct f2fs_rwsem i_xattr_sem; /* avoid racing between reading and changing EAs */
842
843	int i_extra_isize; /* size of extra space located in i_addr */
844	kprojid_t i_projid; /* id for project quota */
845	int i_inline_xattr_size; /* inline xattr size */
846	struct timespec64 i_crtime; /* inode creation time */
847	struct timespec64 i_disk_time[3];/* inode disk times */
848
849	/* for file compress */
850	atomic_t i_compr_blocks; /* # of compressed blocks */
851	unsigned char i_compress_algorithm; /* algorithm type */
852	unsigned char i_log_cluster_size; /* log of cluster size */
853	unsigned char i_compress_level; /* compress level (lz4hc,zstd) */
854	unsigned char i_compress_flag; /* compress flag */
855	unsigned int i_cluster_size; /* cluster size */
856
857	unsigned int atomic_write_cnt;
858	loff_t original_i_size; /* original i_size before atomic write */
859	};
860
861	static inline void get_read_extent_info(struct extent_info *ext,
862	struct f2fs_extent *i_ext)
863	{
864	ext->fofs = le32_to_cpu(i_ext->fofs);
865	ext->blk = le32_to_cpu(i_ext->blk);
866	ext->len = le32_to_cpu(i_ext->len);
867	}
868
869	static inline void set_raw_read_extent(struct extent_info *ext,
870	struct f2fs_extent *i_ext)
871	{
872	i_ext->fofs = cpu_to_le32(ext->fofs);
873	i_ext->blk = cpu_to_le32(ext->blk);
874	i_ext->len = cpu_to_le32(ext->len);
875	}
876
877	static inline bool __is_discard_mergeable(struct discard_info *back,
878	struct discard_info *front, unsigned int max_len)
879	{
880	return (back->lstart + back->len == front->lstart) &&
881	(back->len + front->len <= max_len);
882	}
883
884	static inline bool __is_discard_back_mergeable(struct discard_info *cur,
885	struct discard_info *back, unsigned int max_len)
886	{
887	return __is_discard_mergeable(back, front: cur, max_len);
888	}
889
890	static inline bool __is_discard_front_mergeable(struct discard_info *cur,
891	struct discard_info *front, unsigned int max_len)
892	{
893	return __is_discard_mergeable(back: cur, front, max_len);
894	}
895
896	/*
897	* For free nid management
898	*/
899	enum nid_state {
900	FREE_NID, /* newly added to free nid list */
901	PREALLOC_NID, /* it is preallocated */
902	MAX_NID_STATE,
903	};
904
905	enum nat_state {
906	TOTAL_NAT,
907	DIRTY_NAT,
908	RECLAIMABLE_NAT,
909	MAX_NAT_STATE,
910	};
911
912	struct f2fs_nm_info {
913	block_t nat_blkaddr; /* base disk address of NAT */
914	nid_t max_nid; /* maximum possible node ids */
915	nid_t available_nids; /* # of available node ids */
916	nid_t next_scan_nid; /* the next nid to be scanned */
917	nid_t max_rf_node_blocks; /* max # of nodes for recovery */
918	unsigned int ram_thresh; /* control the memory footprint */
919	unsigned int ra_nid_pages; /* # of nid pages to be readaheaded */
920	unsigned int dirty_nats_ratio; /* control dirty nats ratio threshold */
921
922	/* NAT cache management */
923	struct radix_tree_root nat_root;/* root of the nat entry cache */
924	struct radix_tree_root nat_set_root;/* root of the nat set cache */
925	struct f2fs_rwsem nat_tree_lock; /* protect nat entry tree */
926	struct list_head nat_entries; /* cached nat entry list (clean) */
927	spinlock_t nat_list_lock; /* protect clean nat entry list */
928	unsigned int nat_cnt[MAX_NAT_STATE]; /* the # of cached nat entries */
929	unsigned int nat_blocks; /* # of nat blocks */
930
931	/* free node ids management */
932	struct radix_tree_root free_nid_root;/* root of the free_nid cache */
933	struct list_head free_nid_list; /* list for free nids excluding preallocated nids */
934	unsigned int nid_cnt[MAX_NID_STATE]; /* the number of free node id */
935	spinlock_t nid_list_lock; /* protect nid lists ops */
936	struct mutex build_lock; /* lock for build free nids */
937	unsigned char **free_nid_bitmap;
938	unsigned char *nat_block_bitmap;
939	unsigned short *free_nid_count; /* free nid count of NAT block */
940
941	/* for checkpoint */
942	char *nat_bitmap; /* NAT bitmap pointer */
943
944	unsigned int nat_bits_blocks; /* # of nat bits blocks */
945	unsigned char *nat_bits; /* NAT bits blocks */
946	unsigned char *full_nat_bits; /* full NAT pages */
947	unsigned char *empty_nat_bits; /* empty NAT pages */
948	#ifdef CONFIG_F2FS_CHECK_FS
949	char *nat_bitmap_mir; /* NAT bitmap mirror */
950	#endif
951	int bitmap_size; /* bitmap size */
952	};
953
954	/*
955	* this structure is used as one of function parameters.
956	* all the information are dedicated to a given direct node block determined
957	* by the data offset in a file.
958	*/
959	struct dnode_of_data {
960	struct inode *inode; /* vfs inode pointer */
961	struct page *inode_page; /* its inode page, NULL is possible */
962	struct page *node_page; /* cached direct node page */
963	nid_t nid; /* node id of the direct node block */
964	unsigned int ofs_in_node; /* data offset in the node page */
965	bool inode_page_locked; /* inode page is locked or not */
966	bool node_changed; /* is node block changed */
967	char cur_level; /* level of hole node page */
968	char max_level; /* level of current page located */
969	block_t data_blkaddr; /* block address of the node block */
970	};
971
972	static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
973	struct page *ipage, struct page *npage, nid_t nid)
974	{
975	memset(dn, 0, sizeof(*dn));
976	dn->inode = inode;
977	dn->inode_page = ipage;
978	dn->node_page = npage;
979	dn->nid = nid;
980	}
981
982	/*
983	* For SIT manager
984	*
985	* By default, there are 6 active log areas across the whole main area.
986	* When considering hot and cold data separation to reduce cleaning overhead,
987	* we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
988	* respectively.
989	* In the current design, you should not change the numbers intentionally.
990	* Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
991	* logs individually according to the underlying devices. (default: 6)
992	* Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
993	* data and 8 for node logs.
994	*/
995	#define NR_CURSEG_DATA_TYPE (3)
996	#define NR_CURSEG_NODE_TYPE (3)
997	#define NR_CURSEG_INMEM_TYPE (2)
998	#define NR_CURSEG_RO_TYPE (2)
999	#define NR_CURSEG_PERSIST_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
1000	#define NR_CURSEG_TYPE (NR_CURSEG_INMEM_TYPE + NR_CURSEG_PERSIST_TYPE)
1001
1002	enum {
1003	CURSEG_HOT_DATA = 0, /* directory entry blocks */
1004	CURSEG_WARM_DATA, /* data blocks */
1005	CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
1006	CURSEG_HOT_NODE, /* direct node blocks of directory files */
1007	CURSEG_WARM_NODE, /* direct node blocks of normal files */
1008	CURSEG_COLD_NODE, /* indirect node blocks */
1009	NR_PERSISTENT_LOG, /* number of persistent log */
1010	CURSEG_COLD_DATA_PINNED = NR_PERSISTENT_LOG,
1011	/* pinned file that needs consecutive block address */
1012	CURSEG_ALL_DATA_ATGC, /* SSR alloctor in hot/warm/cold data area */
1013	NO_CHECK_TYPE, /* number of persistent & inmem log */
1014	};
1015
1016	struct flush_cmd {
1017	struct completion wait;
1018	struct llist_node llnode;
1019	nid_t ino;
1020	int ret;
1021	};
1022
1023	struct flush_cmd_control {
1024	struct task_struct *f2fs_issue_flush; /* flush thread */
1025	wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
1026	atomic_t issued_flush; /* # of issued flushes */
1027	atomic_t queued_flush; /* # of queued flushes */
1028	struct llist_head issue_list; /* list for command issue */
1029	struct llist_node *dispatch_list; /* list for command dispatch */
1030	};
1031
1032	struct f2fs_sm_info {
1033	struct sit_info *sit_info; /* whole segment information */
1034	struct free_segmap_info *free_info; /* free segment information */
1035	struct dirty_seglist_info *dirty_info; /* dirty segment information */
1036	struct curseg_info *curseg_array; /* active segment information */
1037
1038	struct f2fs_rwsem curseg_lock; /* for preventing curseg change */
1039
1040	block_t seg0_blkaddr; /* block address of 0'th segment */
1041	block_t main_blkaddr; /* start block address of main area */
1042	block_t ssa_blkaddr; /* start block address of SSA area */
1043
1044	unsigned int segment_count; /* total # of segments */
1045	unsigned int main_segments; /* # of segments in main area */
1046	unsigned int reserved_segments; /* # of reserved segments */
1047	unsigned int additional_reserved_segments;/* reserved segs for IO align feature */
1048	unsigned int ovp_segments; /* # of overprovision segments */
1049
1050	/* a threshold to reclaim prefree segments */
1051	unsigned int rec_prefree_segments;
1052
1053	struct list_head sit_entry_set; /* sit entry set list */
1054
1055	unsigned int ipu_policy; /* in-place-update policy */
1056	unsigned int min_ipu_util; /* in-place-update threshold */
1057	unsigned int min_fsync_blocks; /* threshold for fsync */
1058	unsigned int min_seq_blocks; /* threshold for sequential blocks */
1059	unsigned int min_hot_blocks; /* threshold for hot block allocation */
1060	unsigned int min_ssr_sections; /* threshold to trigger SSR allocation */
1061
1062	/* for flush command control */
1063	struct flush_cmd_control *fcc_info;
1064
1065	/* for discard command control */
1066	struct discard_cmd_control *dcc_info;
1067	};
1068
1069	/*
1070	* For superblock
1071	*/
1072	/*
1073	* COUNT_TYPE for monitoring
1074	*
1075	* f2fs monitors the number of several block types such as on-writeback,
1076	* dirty dentry blocks, dirty node blocks, and dirty meta blocks.
1077	*/
1078	#define WB_DATA_TYPE(p) (__is_cp_guaranteed(p) ? F2FS_WB_CP_DATA : F2FS_WB_DATA)
1079	enum count_type {
1080	F2FS_DIRTY_DENTS,
1081	F2FS_DIRTY_DATA,
1082	F2FS_DIRTY_QDATA,
1083	F2FS_DIRTY_NODES,
1084	F2FS_DIRTY_META,
1085	F2FS_DIRTY_IMETA,
1086	F2FS_WB_CP_DATA,
1087	F2FS_WB_DATA,
1088	F2FS_RD_DATA,
1089	F2FS_RD_NODE,
1090	F2FS_RD_META,
1091	F2FS_DIO_WRITE,
1092	F2FS_DIO_READ,
1093	NR_COUNT_TYPE,
1094	};
1095
1096	/*
1097	* The below are the page types of bios used in submit_bio().
1098	* The available types are:
1099	* DATA User data pages. It operates as async mode.
1100	* NODE Node pages. It operates as async mode.
1101	* META FS metadata pages such as SIT, NAT, CP.
1102	* NR_PAGE_TYPE The number of page types.
1103	* META_FLUSH Make sure the previous pages are written
1104	* with waiting the bio's completion
1105	* ... Only can be used with META.
1106	*/
1107	#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
1108	enum page_type {
1109	DATA = 0,
1110	NODE = 1, /* should not change this */
1111	META,
1112	NR_PAGE_TYPE,
1113	META_FLUSH,
1114	IPU, /* the below types are used by tracepoints only. */
1115	OPU,
1116	};
1117
1118	enum temp_type {
1119	HOT = 0, /* must be zero for meta bio */
1120	WARM,
1121	COLD,
1122	NR_TEMP_TYPE,
1123	};
1124
1125	enum need_lock_type {
1126	LOCK_REQ = 0,
1127	LOCK_DONE,
1128	LOCK_RETRY,
1129	};
1130
1131	enum cp_reason_type {
1132	CP_NO_NEEDED,
1133	CP_NON_REGULAR,
1134	CP_COMPRESSED,
1135	CP_HARDLINK,
1136	CP_SB_NEED_CP,
1137	CP_WRONG_PINO,
1138	CP_NO_SPC_ROLL,
1139	CP_NODE_NEED_CP,
1140	CP_FASTBOOT_MODE,
1141	CP_SPEC_LOG_NUM,
1142	CP_RECOVER_DIR,
1143	};
1144
1145	enum iostat_type {
1146	/* WRITE IO */
1147	APP_DIRECT_IO, /* app direct write IOs */
1148	APP_BUFFERED_IO, /* app buffered write IOs */
1149	APP_WRITE_IO, /* app write IOs */
1150	APP_MAPPED_IO, /* app mapped IOs */
1151	APP_BUFFERED_CDATA_IO, /* app buffered write IOs on compressed file */
1152	APP_MAPPED_CDATA_IO, /* app mapped write IOs on compressed file */
1153	FS_DATA_IO, /* data IOs from kworker/fsync/reclaimer */
1154	FS_CDATA_IO, /* data IOs from kworker/fsync/reclaimer on compressed file */
1155	FS_NODE_IO, /* node IOs from kworker/fsync/reclaimer */
1156	FS_META_IO, /* meta IOs from kworker/reclaimer */
1157	FS_GC_DATA_IO, /* data IOs from forground gc */
1158	FS_GC_NODE_IO, /* node IOs from forground gc */
1159	FS_CP_DATA_IO, /* data IOs from checkpoint */
1160	FS_CP_NODE_IO, /* node IOs from checkpoint */
1161	FS_CP_META_IO, /* meta IOs from checkpoint */
1162
1163	/* READ IO */
1164	APP_DIRECT_READ_IO, /* app direct read IOs */
1165	APP_BUFFERED_READ_IO, /* app buffered read IOs */
1166	APP_READ_IO, /* app read IOs */
1167	APP_MAPPED_READ_IO, /* app mapped read IOs */
1168	APP_BUFFERED_CDATA_READ_IO, /* app buffered read IOs on compressed file */
1169	APP_MAPPED_CDATA_READ_IO, /* app mapped read IOs on compressed file */
1170	FS_DATA_READ_IO, /* data read IOs */
1171	FS_GDATA_READ_IO, /* data read IOs from background gc */
1172	FS_CDATA_READ_IO, /* compressed data read IOs */
1173	FS_NODE_READ_IO, /* node read IOs */
1174	FS_META_READ_IO, /* meta read IOs */
1175
1176	/* other */
1177	FS_DISCARD_IO, /* discard */
1178	FS_FLUSH_IO, /* flush */
1179	FS_ZONE_RESET_IO, /* zone reset */
1180	NR_IO_TYPE,
1181	};
1182
1183	struct f2fs_io_info {
1184	struct f2fs_sb_info *sbi; /* f2fs_sb_info pointer */
1185	nid_t ino; /* inode number */
1186	enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
1187	enum temp_type temp; /* contains HOT/WARM/COLD */
1188	enum req_op op; /* contains REQ_OP_ */
1189	blk_opf_t op_flags; /* req_flag_bits */
1190	block_t new_blkaddr; /* new block address to be written */
1191	block_t old_blkaddr; /* old block address before Cow */
1192	struct page *page; /* page to be written */
1193	struct page *encrypted_page; /* encrypted page */
1194	struct page *compressed_page; /* compressed page */
1195	struct list_head list; /* serialize IOs */
1196	unsigned int compr_blocks; /* # of compressed block addresses */
1197	unsigned int need_lock:8; /* indicate we need to lock cp_rwsem */
1198	unsigned int version:8; /* version of the node */
1199	unsigned int submitted:1; /* indicate IO submission */
1200	unsigned int in_list:1; /* indicate fio is in io_list */
1201	unsigned int is_por:1; /* indicate IO is from recovery or not */
1202	unsigned int retry:1; /* need to reallocate block address */
1203	unsigned int encrypted:1; /* indicate file is encrypted */
1204	unsigned int post_read:1; /* require post read */
1205	enum iostat_type io_type; /* io type */
1206	struct writeback_control *io_wbc; /* writeback control */
1207	struct bio **bio; /* bio for ipu */
1208	sector_t *last_block; /* last block number in bio */
1209	};
1210
1211	struct bio_entry {
1212	struct bio *bio;
1213	struct list_head list;
1214	};
1215
1216	#define is_read_io(rw) ((rw) == READ)
1217	struct f2fs_bio_info {
1218	struct f2fs_sb_info *sbi; /* f2fs superblock */
1219	struct bio *bio; /* bios to merge */
1220	sector_t last_block_in_bio; /* last block number */
1221	struct f2fs_io_info fio; /* store buffered io info. */
1222	#ifdef CONFIG_BLK_DEV_ZONED
1223	struct completion zone_wait; /* condition value for the previous open zone to close */
1224	struct bio *zone_pending_bio; /* pending bio for the previous zone */
1225	void *bi_private; /* previous bi_private for pending bio */
1226	#endif
1227	struct f2fs_rwsem io_rwsem; /* blocking op for bio */
1228	spinlock_t io_lock; /* serialize DATA/NODE IOs */
1229	struct list_head io_list; /* track fios */
1230	struct list_head bio_list; /* bio entry list head */
1231	struct f2fs_rwsem bio_list_lock; /* lock to protect bio entry list */
1232	};
1233
1234	#define FDEV(i) (sbi->devs[i])
1235	#define RDEV(i) (raw_super->devs[i])
1236	struct f2fs_dev_info {
1237	struct bdev_handle *bdev_handle;
1238	struct block_device *bdev;
1239	char path[MAX_PATH_LEN];
1240	unsigned int total_segments;
1241	block_t start_blk;
1242	block_t end_blk;
1243	#ifdef CONFIG_BLK_DEV_ZONED
1244	unsigned int nr_blkz; /* Total number of zones */
1245	unsigned long *blkz_seq; /* Bitmap indicating sequential zones */
1246	#endif
1247	};
1248
1249	enum inode_type {
1250	DIR_INODE, /* for dirty dir inode */
1251	FILE_INODE, /* for dirty regular/symlink inode */
1252	DIRTY_META, /* for all dirtied inode metadata */
1253	NR_INODE_TYPE,
1254	};
1255
1256	/* for inner inode cache management */
1257	struct inode_management {
1258	struct radix_tree_root ino_root; /* ino entry array */
1259	spinlock_t ino_lock; /* for ino entry lock */
1260	struct list_head ino_list; /* inode list head */
1261	unsigned long ino_num; /* number of entries */
1262	};
1263
1264	/* for GC_AT */
1265	struct atgc_management {
1266	bool atgc_enabled; /* ATGC is enabled or not */
1267	struct rb_root_cached root; /* root of victim rb-tree */
1268	struct list_head victim_list; /* linked with all victim entries */
1269	unsigned int victim_count; /* victim count in rb-tree */
1270	unsigned int candidate_ratio; /* candidate ratio */
1271	unsigned int max_candidate_count; /* max candidate count */
1272	unsigned int age_weight; /* age weight, vblock_weight = 100 - age_weight */
1273	unsigned long long age_threshold; /* age threshold */
1274	};
1275
1276	struct f2fs_gc_control {
1277	unsigned int victim_segno; /* target victim segment number */
1278	int init_gc_type; /* FG_GC or BG_GC */
1279	bool no_bg_gc; /* check the space and stop bg_gc */
1280	bool should_migrate_blocks; /* should migrate blocks */
1281	bool err_gc_skipped; /* return EAGAIN if GC skipped */
1282	unsigned int nr_free_secs; /* # of free sections to do GC */
1283	};
1284
1285	/*
1286	* For s_flag in struct f2fs_sb_info
1287	* Modification on enum should be synchronized with s_flag array
1288	*/
1289	enum {
1290	SBI_IS_DIRTY, /* dirty flag for checkpoint */
1291	SBI_IS_CLOSE, /* specify unmounting */
1292	SBI_NEED_FSCK, /* need fsck.f2fs to fix */
1293	SBI_POR_DOING, /* recovery is doing or not */
1294	SBI_NEED_SB_WRITE, /* need to recover superblock */
1295	SBI_NEED_CP, /* need to checkpoint */
1296	SBI_IS_SHUTDOWN, /* shutdown by ioctl */
1297	SBI_IS_RECOVERED, /* recovered orphan/data */
1298	SBI_CP_DISABLED, /* CP was disabled last mount */
1299	SBI_CP_DISABLED_QUICK, /* CP was disabled quickly */
1300	SBI_QUOTA_NEED_FLUSH, /* need to flush quota info in CP */
1301	SBI_QUOTA_SKIP_FLUSH, /* skip flushing quota in current CP */
1302	SBI_QUOTA_NEED_REPAIR, /* quota file may be corrupted */
1303	SBI_IS_RESIZEFS, /* resizefs is in process */
1304	SBI_IS_FREEZING, /* freezefs is in process */
1305	SBI_IS_WRITABLE, /* remove ro mountoption transiently */
1306	MAX_SBI_FLAG,
1307	};
1308
1309	enum {
1310	CP_TIME,
1311	REQ_TIME,
1312	DISCARD_TIME,
1313	GC_TIME,
1314	DISABLE_TIME,
1315	UMOUNT_DISCARD_TIMEOUT,
1316	MAX_TIME,
1317	};
1318
1319	/* Note that you need to keep synchronization with this gc_mode_names array */
1320	enum {
1321	GC_NORMAL,
1322	GC_IDLE_CB,
1323	GC_IDLE_GREEDY,
1324	GC_IDLE_AT,
1325	GC_URGENT_HIGH,
1326	GC_URGENT_LOW,
1327	GC_URGENT_MID,
1328	MAX_GC_MODE,
1329	};
1330
1331	enum {
1332	BGGC_MODE_ON, /* background gc is on */
1333	BGGC_MODE_OFF, /* background gc is off */
1334	BGGC_MODE_SYNC, /*
1335	* background gc is on, migrating blocks
1336	* like foreground gc
1337	*/
1338	};
1339
1340	enum {
1341	FS_MODE_ADAPTIVE, /* use both lfs/ssr allocation */
1342	FS_MODE_LFS, /* use lfs allocation only */
1343	FS_MODE_FRAGMENT_SEG, /* segment fragmentation mode */
1344	FS_MODE_FRAGMENT_BLK, /* block fragmentation mode */
1345	};
1346
1347	enum {
1348	ALLOC_MODE_DEFAULT, /* stay default */
1349	ALLOC_MODE_REUSE, /* reuse segments as much as possible */
1350	};
1351
1352	enum fsync_mode {
1353	FSYNC_MODE_POSIX, /* fsync follows posix semantics */
1354	FSYNC_MODE_STRICT, /* fsync behaves in line with ext4 */
1355	FSYNC_MODE_NOBARRIER, /* fsync behaves nobarrier based on posix */
1356	};
1357
1358	enum {
1359	COMPR_MODE_FS, /*
1360	* automatically compress compression
1361	* enabled files
1362	*/
1363	COMPR_MODE_USER, /*
1364	* automatical compression is disabled.
1365	* user can control the file compression
1366	* using ioctls
1367	*/
1368	};
1369
1370	enum {
1371	DISCARD_UNIT_BLOCK, /* basic discard unit is block */
1372	DISCARD_UNIT_SEGMENT, /* basic discard unit is segment */
1373	DISCARD_UNIT_SECTION, /* basic discard unit is section */
1374	};
1375
1376	enum {
1377	MEMORY_MODE_NORMAL, /* memory mode for normal devices */
1378	MEMORY_MODE_LOW, /* memory mode for low memry devices */
1379	};
1380
1381	enum errors_option {
1382	MOUNT_ERRORS_READONLY, /* remount fs ro on errors */
1383	MOUNT_ERRORS_CONTINUE, /* continue on errors */
1384	MOUNT_ERRORS_PANIC, /* panic on errors */
1385	};
1386
1387	enum {
1388	BACKGROUND,
1389	FOREGROUND,
1390	MAX_CALL_TYPE,
1391	TOTAL_CALL = FOREGROUND,
1392	};
1393
1394	static inline int f2fs_test_bit(unsigned int nr, char *addr);
1395	static inline void f2fs_set_bit(unsigned int nr, char *addr);
1396	static inline void f2fs_clear_bit(unsigned int nr, char *addr);
1397
1398	/*
1399	* Layout of f2fs page.private:
1400	*
1401	* Layout A: lowest bit should be 1
1402	* | bit0 = 1 | bit1 | bit2 | ... | bit MAX | private data .... |
1403	* bit 0 PAGE_PRIVATE_NOT_POINTER
1404	* bit 1 PAGE_PRIVATE_DUMMY_WRITE
1405	* bit 2 PAGE_PRIVATE_ONGOING_MIGRATION
1406	* bit 3 PAGE_PRIVATE_INLINE_INODE
1407	* bit 4 PAGE_PRIVATE_REF_RESOURCE
1408	* bit 5- f2fs private data
1409	*
1410	* Layout B: lowest bit should be 0
1411	* page.private is a wrapped pointer.
1412	*/
1413	enum {
1414	PAGE_PRIVATE_NOT_POINTER, /* private contains non-pointer data */
1415	PAGE_PRIVATE_DUMMY_WRITE, /* data page for padding aligned IO */
1416	PAGE_PRIVATE_ONGOING_MIGRATION, /* data page which is on-going migrating */
1417	PAGE_PRIVATE_INLINE_INODE, /* inode page contains inline data */
1418	PAGE_PRIVATE_REF_RESOURCE, /* dirty page has referenced resources */
1419	PAGE_PRIVATE_MAX
1420	};
1421
1422	/* For compression */
1423	enum compress_algorithm_type {
1424	COMPRESS_LZO,
1425	COMPRESS_LZ4,
1426	COMPRESS_ZSTD,
1427	COMPRESS_LZORLE,
1428	COMPRESS_MAX,
1429	};
1430
1431	enum compress_flag {
1432	COMPRESS_CHKSUM,
1433	COMPRESS_MAX_FLAG,
1434	};
1435
1436	#define COMPRESS_WATERMARK 20
1437	#define COMPRESS_PERCENT 20
1438
1439	#define COMPRESS_DATA_RESERVED_SIZE 4
1440	struct compress_data {
1441	__le32 clen; /* compressed data size */
1442	__le32 chksum; /* compressed data chksum */
1443	__le32 reserved[COMPRESS_DATA_RESERVED_SIZE]; /* reserved */
1444	u8 cdata[]; /* compressed data */
1445	};
1446
1447	#define COMPRESS_HEADER_SIZE (sizeof(struct compress_data))
1448
1449	#define F2FS_COMPRESSED_PAGE_MAGIC 0xF5F2C000
1450
1451	#define F2FS_ZSTD_DEFAULT_CLEVEL 1
1452
1453	#define COMPRESS_LEVEL_OFFSET 8
1454
1455	/* compress context */
1456	struct compress_ctx {
1457	struct inode *inode; /* inode the context belong to */
1458	pgoff_t cluster_idx; /* cluster index number */
1459	unsigned int cluster_size; /* page count in cluster */
1460	unsigned int log_cluster_size; /* log of cluster size */
1461	struct page **rpages; /* pages store raw data in cluster */
1462	unsigned int nr_rpages; /* total page number in rpages */
1463	struct page **cpages; /* pages store compressed data in cluster */
1464	unsigned int nr_cpages; /* total page number in cpages */
1465	unsigned int valid_nr_cpages; /* valid page number in cpages */
1466	void *rbuf; /* virtual mapped address on rpages */
1467	struct compress_data *cbuf; /* virtual mapped address on cpages */
1468	size_t rlen; /* valid data length in rbuf */
1469	size_t clen; /* valid data length in cbuf */
1470	void *private; /* payload buffer for specified compression algorithm */
1471	void *private2; /* extra payload buffer */
1472	};
1473
1474	/* compress context for write IO path */
1475	struct compress_io_ctx {
1476	u32 magic; /* magic number to indicate page is compressed */
1477	struct inode *inode; /* inode the context belong to */
1478	struct page **rpages; /* pages store raw data in cluster */
1479	unsigned int nr_rpages; /* total page number in rpages */
1480	atomic_t pending_pages; /* in-flight compressed page count */
1481	};
1482
1483	/* Context for decompressing one cluster on the read IO path */
1484	struct decompress_io_ctx {
1485	u32 magic; /* magic number to indicate page is compressed */
1486	struct inode *inode; /* inode the context belong to */
1487	pgoff_t cluster_idx; /* cluster index number */
1488	unsigned int cluster_size; /* page count in cluster */
1489	unsigned int log_cluster_size; /* log of cluster size */
1490	struct page **rpages; /* pages store raw data in cluster */
1491	unsigned int nr_rpages; /* total page number in rpages */
1492	struct page **cpages; /* pages store compressed data in cluster */
1493	unsigned int nr_cpages; /* total page number in cpages */
1494	struct page **tpages; /* temp pages to pad holes in cluster */
1495	void *rbuf; /* virtual mapped address on rpages */
1496	struct compress_data *cbuf; /* virtual mapped address on cpages */
1497	size_t rlen; /* valid data length in rbuf */
1498	size_t clen; /* valid data length in cbuf */
1499
1500	/*
1501	* The number of compressed pages remaining to be read in this cluster.
1502	* This is initially nr_cpages. It is decremented by 1 each time a page
1503	* has been read (or failed to be read). When it reaches 0, the cluster
1504	* is decompressed (or an error is reported).
1505	*
1506	* If an error occurs before all the pages have been submitted for I/O,
1507	* then this will never reach 0. In this case the I/O submitter is
1508	* responsible for calling f2fs_decompress_end_io() instead.
1509	*/
1510	atomic_t remaining_pages;
1511
1512	/*
1513	* Number of references to this decompress_io_ctx.
1514	*
1515	* One reference is held for I/O completion. This reference is dropped
1516	* after the pagecache pages are updated and unlocked -- either after
1517	* decompression (and verity if enabled), or after an error.
1518	*
1519	* In addition, each compressed page holds a reference while it is in a
1520	* bio. These references are necessary prevent compressed pages from
1521	* being freed while they are still in a bio.
1522	*/
1523	refcount_t refcnt;
1524
1525	bool failed; /* IO error occurred before decompression? */
1526	bool need_verity; /* need fs-verity verification after decompression? */
1527	void *private; /* payload buffer for specified decompression algorithm */
1528	void *private2; /* extra payload buffer */
1529	struct work_struct verity_work; /* work to verify the decompressed pages */
1530	struct work_struct free_work; /* work for late free this structure itself */
1531	};
1532
1533	#define NULL_CLUSTER ((unsigned int)(~0))
1534	#define MIN_COMPRESS_LOG_SIZE 2
1535	#define MAX_COMPRESS_LOG_SIZE 8
1536	#define MAX_COMPRESS_WINDOW_SIZE(log_size) ((PAGE_SIZE) << (log_size))
1537
1538	struct f2fs_sb_info {
1539	struct super_block *sb; /* pointer to VFS super block */
1540	struct proc_dir_entry *s_proc; /* proc entry */
1541	struct f2fs_super_block *raw_super; /* raw super block pointer */
1542	struct f2fs_rwsem sb_lock; /* lock for raw super block */
1543	int valid_super_block; /* valid super block no */
1544	unsigned long s_flag; /* flags for sbi */
1545	struct mutex writepages; /* mutex for writepages() */
1546
1547	#ifdef CONFIG_BLK_DEV_ZONED
1548	unsigned int blocks_per_blkz; /* F2FS blocks per zone */
1549	#endif
1550
1551	/* for node-related operations */
1552	struct f2fs_nm_info *nm_info; /* node manager */
1553	struct inode *node_inode; /* cache node blocks */
1554
1555	/* for segment-related operations */
1556	struct f2fs_sm_info *sm_info; /* segment manager */
1557
1558	/* for bio operations */
1559	struct f2fs_bio_info *write_io[NR_PAGE_TYPE]; /* for write bios */
1560	/* keep migration IO order for LFS mode */
1561	struct f2fs_rwsem io_order_lock;
1562	mempool_t *write_io_dummy; /* Dummy pages */
1563	pgoff_t page_eio_ofs[NR_PAGE_TYPE]; /* EIO page offset */
1564	int page_eio_cnt[NR_PAGE_TYPE]; /* EIO count */
1565
1566	/* for checkpoint */
1567	struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
1568	int cur_cp_pack; /* remain current cp pack */
1569	spinlock_t cp_lock; /* for flag in ckpt */
1570	struct inode *meta_inode; /* cache meta blocks */
1571	struct f2fs_rwsem cp_global_sem; /* checkpoint procedure lock */
1572	struct f2fs_rwsem cp_rwsem; /* blocking FS operations */
1573	struct f2fs_rwsem node_write; /* locking node writes */
1574	struct f2fs_rwsem node_change; /* locking node change */
1575	wait_queue_head_t cp_wait;
1576	unsigned long last_time[MAX_TIME]; /* to store time in jiffies */
1577	long interval_time[MAX_TIME]; /* to store thresholds */
1578	struct ckpt_req_control cprc_info; /* for checkpoint request control */
1579
1580	struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
1581
1582	spinlock_t fsync_node_lock; /* for node entry lock */
1583	struct list_head fsync_node_list; /* node list head */
1584	unsigned int fsync_seg_id; /* sequence id */
1585	unsigned int fsync_node_num; /* number of node entries */
1586
1587	/* for orphan inode, use 0'th array */
1588	unsigned int max_orphans; /* max orphan inodes */
1589
1590	/* for inode management */
1591	struct list_head inode_list[NR_INODE_TYPE]; /* dirty inode list */
1592	spinlock_t inode_lock[NR_INODE_TYPE]; /* for dirty inode list lock */
1593	struct mutex flush_lock; /* for flush exclusion */
1594
1595	/* for extent tree cache */
1596	struct extent_tree_info extent_tree[NR_EXTENT_CACHES];
1597	atomic64_t allocated_data_blocks; /* for block age extent_cache */
1598
1599	/* The threshold used for hot and warm data seperation*/
1600	unsigned int hot_data_age_threshold;
1601	unsigned int warm_data_age_threshold;
1602	unsigned int last_age_weight;
1603
1604	/* basic filesystem units */
1605	unsigned int log_sectors_per_block; /* log2 sectors per block */
1606	unsigned int log_blocksize; /* log2 block size */
1607	unsigned int blocksize; /* block size */
1608	unsigned int root_ino_num; /* root inode number*/
1609	unsigned int node_ino_num; /* node inode number*/
1610	unsigned int meta_ino_num; /* meta inode number*/
1611	unsigned int log_blocks_per_seg; /* log2 blocks per segment */
1612	unsigned int blocks_per_seg; /* blocks per segment */
1613	unsigned int unusable_blocks_per_sec; /* unusable blocks per section */
1614	unsigned int segs_per_sec; /* segments per section */
1615	unsigned int secs_per_zone; /* sections per zone */
1616	unsigned int total_sections; /* total section count */
1617	unsigned int total_node_count; /* total node block count */
1618	unsigned int total_valid_node_count; /* valid node block count */
1619	int dir_level; /* directory level */
1620	bool readdir_ra; /* readahead inode in readdir */
1621	u64 max_io_bytes; /* max io bytes to merge IOs */
1622
1623	block_t user_block_count; /* # of user blocks */
1624	block_t total_valid_block_count; /* # of valid blocks */
1625	block_t discard_blks; /* discard command candidats */
1626	block_t last_valid_block_count; /* for recovery */
1627	block_t reserved_blocks; /* configurable reserved blocks */
1628	block_t current_reserved_blocks; /* current reserved blocks */
1629
1630	/* Additional tracking for no checkpoint mode */
1631	block_t unusable_block_count; /* # of blocks saved by last cp */
1632
1633	unsigned int nquota_files; /* # of quota sysfile */
1634	struct f2fs_rwsem quota_sem; /* blocking cp for flags */
1635
1636	/* # of pages, see count_type */
1637	atomic_t nr_pages[NR_COUNT_TYPE];
1638	/* # of allocated blocks */
1639	struct percpu_counter alloc_valid_block_count;
1640	/* # of node block writes as roll forward recovery */
1641	struct percpu_counter rf_node_block_count;
1642
1643	/* writeback control */
1644	atomic_t wb_sync_req[META]; /* count # of WB_SYNC threads */
1645
1646	/* valid inode count */
1647	struct percpu_counter total_valid_inode_count;
1648
1649	struct f2fs_mount_info mount_opt; /* mount options */
1650
1651	/* for cleaning operations */
1652	struct f2fs_rwsem gc_lock; /*
1653	* semaphore for GC, avoid
1654	* race between GC and GC or CP
1655	*/
1656	struct f2fs_gc_kthread *gc_thread; /* GC thread */
1657	struct atgc_management am; /* atgc management */
1658	unsigned int cur_victim_sec; /* current victim section num */
1659	unsigned int gc_mode; /* current GC state */
1660	unsigned int next_victim_seg[2]; /* next segment in victim section */
1661	spinlock_t gc_remaining_trials_lock;
1662	/* remaining trial count for GC_URGENT_* and GC_IDLE_* */
1663	unsigned int gc_remaining_trials;
1664
1665	/* for skip statistic */
1666	unsigned long long skipped_gc_rwsem; /* FG_GC only */
1667
1668	/* threshold for gc trials on pinned files */
1669	u64 gc_pin_file_threshold;
1670	struct f2fs_rwsem pin_sem;
1671
1672	/* maximum # of trials to find a victim segment for SSR and GC */
1673	unsigned int max_victim_search;
1674	/* migration granularity of garbage collection, unit: segment */
1675	unsigned int migration_granularity;
1676
1677	/*
1678	* for stat information.
1679	* one is for the LFS mode, and the other is for the SSR mode.
1680	*/
1681	#ifdef CONFIG_F2FS_STAT_FS
1682	struct f2fs_stat_info *stat_info; /* FS status information */
1683	atomic_t meta_count[META_MAX]; /* # of meta blocks */
1684	unsigned int segment_count[2]; /* # of allocated segments */
1685	unsigned int block_count[2]; /* # of allocated blocks */
1686	atomic_t inplace_count; /* # of inplace update */
1687	/* # of lookup extent cache */
1688	atomic64_t total_hit_ext[NR_EXTENT_CACHES];
1689	/* # of hit rbtree extent node */
1690	atomic64_t read_hit_rbtree[NR_EXTENT_CACHES];
1691	/* # of hit cached extent node */
1692	atomic64_t read_hit_cached[NR_EXTENT_CACHES];
1693	/* # of hit largest extent node in read extent cache */
1694	atomic64_t read_hit_largest;
1695	atomic_t inline_xattr; /* # of inline_xattr inodes */
1696	atomic_t inline_inode; /* # of inline_data inodes */
1697	atomic_t inline_dir; /* # of inline_dentry inodes */
1698	atomic_t compr_inode; /* # of compressed inodes */
1699	atomic64_t compr_blocks; /* # of compressed blocks */
1700	atomic_t swapfile_inode; /* # of swapfile inodes */
1701	atomic_t atomic_files; /* # of opened atomic file */
1702	atomic_t max_aw_cnt; /* max # of atomic writes */
1703	unsigned int io_skip_bggc; /* skip background gc for in-flight IO */
1704	unsigned int other_skip_bggc; /* skip background gc for other reasons */
1705	unsigned int ndirty_inode[NR_INODE_TYPE]; /* # of dirty inodes */
1706	atomic_t cp_call_count[MAX_CALL_TYPE]; /* # of cp call */
1707	#endif
1708	spinlock_t stat_lock; /* lock for stat operations */
1709
1710	/* to attach REQ_META|REQ_FUA flags */
1711	unsigned int data_io_flag;
1712	unsigned int node_io_flag;
1713
1714	/* For sysfs support */
1715	struct kobject s_kobj; /* /sys/fs/f2fs/<devname> */
1716	struct completion s_kobj_unregister;
1717
1718	struct kobject s_stat_kobj; /* /sys/fs/f2fs/<devname>/stat */
1719	struct completion s_stat_kobj_unregister;
1720
1721	struct kobject s_feature_list_kobj; /* /sys/fs/f2fs/<devname>/feature_list */
1722	struct completion s_feature_list_kobj_unregister;
1723
1724	/* For shrinker support */
1725	struct list_head s_list;
1726	struct mutex umount_mutex;
1727	unsigned int shrinker_run_no;
1728
1729	/* For multi devices */
1730	int s_ndevs; /* number of devices */
1731	struct f2fs_dev_info *devs; /* for device list */
1732	unsigned int dirty_device; /* for checkpoint data flush */
1733	spinlock_t dev_lock; /* protect dirty_device */
1734	bool aligned_blksize; /* all devices has the same logical blksize */
1735
1736	/* For write statistics */
1737	u64 sectors_written_start;
1738	u64 kbytes_written;
1739
1740	/* Reference to checksum algorithm driver via cryptoapi */
1741	struct crypto_shash *s_chksum_driver;
1742
1743	/* Precomputed FS UUID checksum for seeding other checksums */
1744	__u32 s_chksum_seed;
1745
1746	struct workqueue_struct *post_read_wq; /* post read workqueue */
1747
1748	/*
1749	* If we are in irq context, let's update error information into
1750	* on-disk superblock in the work.
1751	*/
1752	struct work_struct s_error_work;
1753	unsigned char errors[MAX_F2FS_ERRORS]; /* error flags */
1754	unsigned char stop_reason[MAX_STOP_REASON]; /* stop reason */
1755	spinlock_t error_lock; /* protect errors/stop_reason array */
1756	bool error_dirty; /* errors of sb is dirty */
1757
1758	struct kmem_cache *inline_xattr_slab; /* inline xattr entry */
1759	unsigned int inline_xattr_slab_size; /* default inline xattr slab size */
1760
1761	/* For reclaimed segs statistics per each GC mode */
1762	unsigned int gc_segment_mode; /* GC state for reclaimed segments */
1763	unsigned int gc_reclaimed_segs[MAX_GC_MODE]; /* Reclaimed segs for each mode */
1764
1765	unsigned long seq_file_ra_mul; /* multiplier for ra_pages of seq. files in fadvise */
1766
1767	int max_fragment_chunk; /* max chunk size for block fragmentation mode */
1768	int max_fragment_hole; /* max hole size for block fragmentation mode */
1769
1770	/* For atomic write statistics */
1771	atomic64_t current_atomic_write;
1772	s64 peak_atomic_write;
1773	u64 committed_atomic_block;
1774	u64 revoked_atomic_block;
1775
1776	#ifdef CONFIG_F2FS_FS_COMPRESSION
1777	struct kmem_cache *page_array_slab; /* page array entry */
1778	unsigned int page_array_slab_size; /* default page array slab size */
1779
1780	/* For runtime compression statistics */
1781	u64 compr_written_block;
1782	u64 compr_saved_block;
1783	u32 compr_new_inode;
1784
1785	/* For compressed block cache */
1786	struct inode *compress_inode; /* cache compressed blocks */
1787	unsigned int compress_percent; /* cache page percentage */
1788	unsigned int compress_watermark; /* cache page watermark */
1789	atomic_t compress_page_hit; /* cache hit count */
1790	#endif
1791
1792	#ifdef CONFIG_F2FS_IOSTAT
1793	/* For app/fs IO statistics */
1794	spinlock_t iostat_lock;
1795	unsigned long long iostat_count[NR_IO_TYPE];
1796	unsigned long long iostat_bytes[NR_IO_TYPE];
1797	unsigned long long prev_iostat_bytes[NR_IO_TYPE];
1798	bool iostat_enable;
1799	unsigned long iostat_next_period;
1800	unsigned int iostat_period_ms;
1801
1802	/* For io latency related statistics info in one iostat period */
1803	spinlock_t iostat_lat_lock;
1804	struct iostat_lat_info *iostat_io_lat;
1805	#endif
1806	};
1807
1808	#ifdef CONFIG_F2FS_FAULT_INJECTION
1809	#define time_to_inject(sbi, type) __time_to_inject(sbi, type, __func__, \
1810	__builtin_return_address(0))
1811	static inline bool __time_to_inject(struct f2fs_sb_info *sbi, int type,
1812	const char *func, const char *parent_func)
1813	{
1814	struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
1815
1816	if (!ffi->inject_rate)
1817	return false;
1818
1819	if (!IS_FAULT_SET(ffi, type))
1820	return false;
1821
1822	atomic_inc(v: &ffi->inject_ops);
1823	if (atomic_read(v: &ffi->inject_ops) >= ffi->inject_rate) {
1824	atomic_set(v: &ffi->inject_ops, i: 0);
1825	printk_ratelimited("%sF2FS-fs (%s) : inject %s in %s of %pS\n",
1826	KERN_INFO, sbi->sb->s_id, f2fs_fault_name[type],
1827	func, parent_func);
1828	return true;
1829	}
1830	return false;
1831	}
1832	#else
1833	static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
1834	{
1835	return false;
1836	}
1837	#endif
1838
1839	/*
1840	* Test if the mounted volume is a multi-device volume.
1841	* - For a single regular disk volume, sbi->s_ndevs is 0.
1842	* - For a single zoned disk volume, sbi->s_ndevs is 1.
1843	* - For a multi-device volume, sbi->s_ndevs is always 2 or more.
1844	*/
1845	static inline bool f2fs_is_multi_device(struct f2fs_sb_info *sbi)
1846	{
1847	return sbi->s_ndevs > 1;
1848	}
1849
1850	static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
1851	{
1852	unsigned long now = jiffies;
1853
1854	sbi->last_time[type] = now;
1855
1856	/* DISCARD_TIME and GC_TIME are based on REQ_TIME */
1857	if (type == REQ_TIME) {
1858	sbi->last_time[DISCARD_TIME] = now;
1859	sbi->last_time[GC_TIME] = now;
1860	}
1861	}
1862
1863	static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
1864	{
1865	unsigned long interval = sbi->interval_time[type] * HZ;
1866
1867	return time_after(jiffies, sbi->last_time[type] + interval);
1868	}
1869
1870	static inline unsigned int f2fs_time_to_wait(struct f2fs_sb_info *sbi,
1871	int type)
1872	{
1873	unsigned long interval = sbi->interval_time[type] * HZ;
1874	unsigned int wait_ms = 0;
1875	long delta;
1876
1877	delta = (sbi->last_time[type] + interval) - jiffies;
1878	if (delta > 0)
1879	wait_ms = jiffies_to_msecs(j: delta);
1880
1881	return wait_ms;
1882	}
1883
1884	/*
1885	* Inline functions
1886	*/
1887	static inline u32 __f2fs_crc32(struct f2fs_sb_info *sbi, u32 crc,
1888	const void *address, unsigned int length)
1889	{
1890	struct {
1891	struct shash_desc shash;
1892	char ctx[4];
1893	} desc;
1894	int err;
1895
1896	BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver) != sizeof(desc.ctx));
1897
1898	desc.shash.tfm = sbi->s_chksum_driver;
1899	*(u32 *)desc.ctx = crc;
1900
1901	err = crypto_shash_update(desc: &desc.shash, data: address, len: length);
1902	BUG_ON(err);
1903
1904	return *(u32 *)desc.ctx;
1905	}
1906
1907	static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
1908	unsigned int length)
1909	{
1910	return __f2fs_crc32(sbi, F2FS_SUPER_MAGIC, address, length);
1911	}
1912
1913	static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
1914	void *buf, size_t buf_size)
1915	{
1916	return f2fs_crc32(sbi, address: buf, length: buf_size) == blk_crc;
1917	}
1918
1919	static inline u32 f2fs_chksum(struct f2fs_sb_info *sbi, u32 crc,
1920	const void *address, unsigned int length)
1921	{
1922	return __f2fs_crc32(sbi, crc, address, length);
1923	}
1924
1925	static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
1926	{
1927	return container_of(inode, struct f2fs_inode_info, vfs_inode);
1928	}
1929
1930	static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
1931	{
1932	return sb->s_fs_info;
1933	}
1934
1935	static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
1936	{
1937	return F2FS_SB(sb: inode->i_sb);
1938	}
1939
1940	static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
1941	{
1942	return F2FS_I_SB(inode: mapping->host);
1943	}
1944
1945	static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
1946	{
1947	return F2FS_M_SB(mapping: page_file_mapping(page));
1948	}
1949
1950	static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
1951	{
1952	return (struct f2fs_super_block *)(sbi->raw_super);
1953	}
1954
1955	static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
1956	{
1957	return (struct f2fs_checkpoint *)(sbi->ckpt);
1958	}
1959
1960	static inline struct f2fs_node *F2FS_NODE(struct page *page)
1961	{
1962	return (struct f2fs_node *)page_address(page);
1963	}
1964
1965	static inline struct f2fs_inode *F2FS_INODE(struct page *page)
1966	{
1967	return &((struct f2fs_node *)page_address(page))->i;
1968	}
1969
1970	static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
1971	{
1972	return (struct f2fs_nm_info *)(sbi->nm_info);
1973	}
1974
1975	static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
1976	{
1977	return (struct f2fs_sm_info *)(sbi->sm_info);
1978	}
1979
1980	static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
1981	{
1982	return (struct sit_info *)(SM_I(sbi)->sit_info);
1983	}
1984
1985	static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
1986	{
1987	return (struct free_segmap_info *)(SM_I(sbi)->free_info);
1988	}
1989
1990	static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
1991	{
1992	return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
1993	}
1994
1995	static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
1996	{
1997	return sbi->meta_inode->i_mapping;
1998	}
1999
2000	static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
2001	{
2002	return sbi->node_inode->i_mapping;
2003	}
2004
2005	static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
2006	{
2007	return test_bit(type, &sbi->s_flag);
2008	}
2009
2010	static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
2011	{
2012	set_bit(nr: type, addr: &sbi->s_flag);
2013	}
2014
2015	static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
2016	{
2017	clear_bit(nr: type, addr: &sbi->s_flag);
2018	}
2019
2020	static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
2021	{
2022	return le64_to_cpu(cp->checkpoint_ver);
2023	}
2024
2025	static inline unsigned long f2fs_qf_ino(struct super_block *sb, int type)
2026	{
2027	if (type < F2FS_MAX_QUOTAS)
2028	return le32_to_cpu(F2FS_SB(sb)->raw_super->qf_ino[type]);
2029	return 0;
2030	}
2031
2032	static inline __u64 cur_cp_crc(struct f2fs_checkpoint *cp)
2033	{
2034	size_t crc_offset = le32_to_cpu(cp->checksum_offset);
2035	return le32_to_cpu(*((__le32 *)((unsigned char *)cp + crc_offset)));
2036	}
2037
2038	static inline bool __is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
2039	{
2040	unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
2041
2042	return ckpt_flags & f;
2043	}
2044
2045	static inline bool is_set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
2046	{
2047	return __is_set_ckpt_flags(cp: F2FS_CKPT(sbi), f);
2048	}
2049
2050	static inline void __set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
2051	{
2052	unsigned int ckpt_flags;
2053
2054	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
2055	ckpt_flags |= f;
2056	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
2057	}
2058
2059	static inline void set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
2060	{
2061	unsigned long flags;
2062
2063	spin_lock_irqsave(&sbi->cp_lock, flags);
2064	__set_ckpt_flags(cp: F2FS_CKPT(sbi), f);
2065	spin_unlock_irqrestore(lock: &sbi->cp_lock, flags);
2066	}
2067
2068	static inline void __clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
2069	{
2070	unsigned int ckpt_flags;
2071
2072	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
2073	ckpt_flags &= (~f);
2074	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
2075	}
2076
2077	static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
2078	{
2079	unsigned long flags;
2080
2081	spin_lock_irqsave(&sbi->cp_lock, flags);
2082	__clear_ckpt_flags(cp: F2FS_CKPT(sbi), f);
2083	spin_unlock_irqrestore(lock: &sbi->cp_lock, flags);
2084	}
2085
2086	#define init_f2fs_rwsem(sem) \
2087	do { \
2088	static struct lock_class_key __key; \
2089	\
2090	__init_f2fs_rwsem((sem), #sem, &__key); \
2091	} while (0)
2092
2093	static inline void __init_f2fs_rwsem(struct f2fs_rwsem *sem,
2094	const char *sem_name, struct lock_class_key *key)
2095	{
2096	__init_rwsem(sem: &sem->internal_rwsem, name: sem_name, key);
2097	#ifdef CONFIG_F2FS_UNFAIR_RWSEM
2098	init_waitqueue_head(&sem->read_waiters);
2099	#endif
2100	}
2101
2102	static inline int f2fs_rwsem_is_locked(struct f2fs_rwsem *sem)
2103	{
2104	return rwsem_is_locked(sem: &sem->internal_rwsem);
2105	}
2106
2107	static inline int f2fs_rwsem_is_contended(struct f2fs_rwsem *sem)
2108	{
2109	return rwsem_is_contended(sem: &sem->internal_rwsem);
2110	}
2111
2112	static inline void f2fs_down_read(struct f2fs_rwsem *sem)
2113	{
2114	#ifdef CONFIG_F2FS_UNFAIR_RWSEM
2115	wait_event(sem->read_waiters, down_read_trylock(&sem->internal_rwsem));
2116	#else
2117	down_read(&sem->internal_rwsem);
2118	#endif
2119	}
2120
2121	static inline int f2fs_down_read_trylock(struct f2fs_rwsem *sem)
2122	{
2123	return down_read_trylock(sem: &sem->internal_rwsem);
2124	}
2125
2126	static inline void f2fs_up_read(struct f2fs_rwsem *sem)
2127	{
2128	up_read(sem: &sem->internal_rwsem);
2129	}
2130
2131	static inline void f2fs_down_write(struct f2fs_rwsem *sem)
2132	{
2133	down_write(sem: &sem->internal_rwsem);
2134	}
2135
2136	#ifdef CONFIG_DEBUG_LOCK_ALLOC
2137	static inline void f2fs_down_read_nested(struct f2fs_rwsem *sem, int subclass)
2138	{
2139	down_read_nested(sem: &sem->internal_rwsem, subclass);
2140	}
2141
2142	static inline void f2fs_down_write_nested(struct f2fs_rwsem *sem, int subclass)
2143	{
2144	down_write_nested(sem: &sem->internal_rwsem, subclass);
2145	}
2146	#else
2147	#define f2fs_down_read_nested(sem, subclass) f2fs_down_read(sem)
2148	#define f2fs_down_write_nested(sem, subclass) f2fs_down_write(sem)
2149	#endif
2150
2151	static inline int f2fs_down_write_trylock(struct f2fs_rwsem *sem)
2152	{
2153	return down_write_trylock(sem: &sem->internal_rwsem);
2154	}
2155
2156	static inline void f2fs_up_write(struct f2fs_rwsem *sem)
2157	{
2158	up_write(sem: &sem->internal_rwsem);
2159	#ifdef CONFIG_F2FS_UNFAIR_RWSEM
2160	wake_up_all(&sem->read_waiters);
2161	#endif
2162	}
2163
2164	static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
2165	{
2166	f2fs_down_read(sem: &sbi->cp_rwsem);
2167	}
2168
2169	static inline int f2fs_trylock_op(struct f2fs_sb_info *sbi)
2170	{
2171	if (time_to_inject(sbi, FAULT_LOCK_OP))
2172	return 0;
2173	return f2fs_down_read_trylock(sem: &sbi->cp_rwsem);
2174	}
2175
2176	static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
2177	{
2178	f2fs_up_read(sem: &sbi->cp_rwsem);
2179	}
2180
2181	static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
2182	{
2183	f2fs_down_write(sem: &sbi->cp_rwsem);
2184	}
2185
2186	static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
2187	{
2188	f2fs_up_write(sem: &sbi->cp_rwsem);
2189	}
2190
2191	static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
2192	{
2193	int reason = CP_SYNC;
2194
2195	if (test_opt(sbi, FASTBOOT))
2196	reason = CP_FASTBOOT;
2197	if (is_sbi_flag_set(sbi, type: SBI_IS_CLOSE))
2198	reason = CP_UMOUNT;
2199	return reason;
2200	}
2201
2202	static inline bool __remain_node_summaries(int reason)
2203	{
2204	return (reason & (CP_UMOUNT | CP_FASTBOOT));
2205	}
2206
2207	static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
2208	{
2209	return (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG) ||
2210	is_set_ckpt_flags(sbi, CP_FASTBOOT_FLAG));
2211	}
2212
2213	/*
2214	* Check whether the inode has blocks or not
2215	*/
2216	static inline int F2FS_HAS_BLOCKS(struct inode *inode)
2217	{
2218	block_t xattr_block = F2FS_I(inode)->i_xattr_nid ? 1 : 0;
2219
2220	return (inode->i_blocks >> F2FS_LOG_SECTORS_PER_BLOCK) > xattr_block;
2221	}
2222
2223	static inline bool f2fs_has_xattr_block(unsigned int ofs)
2224	{
2225	return ofs == XATTR_NODE_OFFSET;
2226	}
2227
2228	static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
2229	struct inode *inode, bool cap)
2230	{
2231	if (!inode)
2232	return true;
2233	if (!test_opt(sbi, RESERVE_ROOT))
2234	return false;
2235	if (IS_NOQUOTA(inode))
2236	return true;
2237	if (uid_eq(F2FS_OPTION(sbi).s_resuid, current_fsuid()))
2238	return true;
2239	if (!gid_eq(F2FS_OPTION(sbi).s_resgid, GLOBAL_ROOT_GID) &&
2240	in_group_p(F2FS_OPTION(sbi).s_resgid))
2241	return true;
2242	if (cap && capable(CAP_SYS_RESOURCE))
2243	return true;
2244	return false;
2245	}
2246
2247	static inline void f2fs_i_blocks_write(struct inode *, block_t, bool, bool);
2248	static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
2249	struct inode *inode, blkcnt_t *count)
2250	{
2251	blkcnt_t diff = 0, release = 0;
2252	block_t avail_user_block_count;
2253	int ret;
2254
2255	ret = dquot_reserve_block(inode, nr: *count);
2256	if (ret)
2257	return ret;
2258
2259	if (time_to_inject(sbi, FAULT_BLOCK)) {
2260	release = *count;
2261	goto release_quota;
2262	}
2263
2264	/*
2265	* let's increase this in prior to actual block count change in order
2266	* for f2fs_sync_file to avoid data races when deciding checkpoint.
2267	*/
2268	percpu_counter_add(fbc: &sbi->alloc_valid_block_count, amount: (*count));
2269
2270	spin_lock(lock: &sbi->stat_lock);
2271	sbi->total_valid_block_count += (block_t)(*count);
2272	avail_user_block_count = sbi->user_block_count -
2273	sbi->current_reserved_blocks;
2274
2275	if (!__allow_reserved_blocks(sbi, inode, cap: true))
2276	avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks;
2277
2278	if (F2FS_IO_ALIGNED(sbi))
2279	avail_user_block_count -= sbi->blocks_per_seg *
2280	SM_I(sbi)->additional_reserved_segments;
2281
2282	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2283	if (avail_user_block_count > sbi->unusable_block_count)
2284	avail_user_block_count -= sbi->unusable_block_count;
2285	else
2286	avail_user_block_count = 0;
2287	}
2288	if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
2289	diff = sbi->total_valid_block_count - avail_user_block_count;
2290	if (diff > *count)
2291	diff = *count;
2292	*count -= diff;
2293	release = diff;
2294	sbi->total_valid_block_count -= diff;
2295	if (!*count) {
2296	spin_unlock(lock: &sbi->stat_lock);
2297	goto enospc;
2298	}
2299	}
2300	spin_unlock(lock: &sbi->stat_lock);
2301
2302	if (unlikely(release)) {
2303	percpu_counter_sub(fbc: &sbi->alloc_valid_block_count, amount: release);
2304	dquot_release_reservation_block(inode, nr: release);
2305	}
2306	f2fs_i_blocks_write(inode, *count, true, true);
2307	return 0;
2308
2309	enospc:
2310	percpu_counter_sub(fbc: &sbi->alloc_valid_block_count, amount: release);
2311	release_quota:
2312	dquot_release_reservation_block(inode, nr: release);
2313	return -ENOSPC;
2314	}
2315
2316	__printf(2, 3)
2317	void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...);
2318
2319	#define f2fs_err(sbi, fmt, ...) \
2320	f2fs_printk(sbi, KERN_ERR fmt, ##__VA_ARGS__)
2321	#define f2fs_warn(sbi, fmt, ...) \
2322	f2fs_printk(sbi, KERN_WARNING fmt, ##__VA_ARGS__)
2323	#define f2fs_notice(sbi, fmt, ...) \
2324	f2fs_printk(sbi, KERN_NOTICE fmt, ##__VA_ARGS__)
2325	#define f2fs_info(sbi, fmt, ...) \
2326	f2fs_printk(sbi, KERN_INFO fmt, ##__VA_ARGS__)
2327	#define f2fs_debug(sbi, fmt, ...) \
2328	f2fs_printk(sbi, KERN_DEBUG fmt, ##__VA_ARGS__)
2329
2330	#define PAGE_PRIVATE_GET_FUNC(name, flagname) \
2331	static inline bool page_private_##name(struct page *page) \
2332	{ \
2333	return PagePrivate(page) && \
2334	test_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)) && \
2335	test_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \
2336	}
2337
2338	#define PAGE_PRIVATE_SET_FUNC(name, flagname) \
2339	static inline void set_page_private_##name(struct page *page) \
2340	{ \
2341	if (!PagePrivate(page)) \
2342	attach_page_private(page, (void *)0); \
2343	set_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)); \
2344	set_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \
2345	}
2346
2347	#define PAGE_PRIVATE_CLEAR_FUNC(name, flagname) \
2348	static inline void clear_page_private_##name(struct page *page) \
2349	{ \
2350	clear_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \
2351	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER)) \
2352	detach_page_private(page); \
2353	}
2354
2355	PAGE_PRIVATE_GET_FUNC(nonpointer, NOT_POINTER);
2356	PAGE_PRIVATE_GET_FUNC(inline, INLINE_INODE);
2357	PAGE_PRIVATE_GET_FUNC(gcing, ONGOING_MIGRATION);
2358	PAGE_PRIVATE_GET_FUNC(dummy, DUMMY_WRITE);
2359
2360	PAGE_PRIVATE_SET_FUNC(reference, REF_RESOURCE);
2361	PAGE_PRIVATE_SET_FUNC(inline, INLINE_INODE);
2362	PAGE_PRIVATE_SET_FUNC(gcing, ONGOING_MIGRATION);
2363	PAGE_PRIVATE_SET_FUNC(dummy, DUMMY_WRITE);
2364
2365	PAGE_PRIVATE_CLEAR_FUNC(reference, REF_RESOURCE);
2366	PAGE_PRIVATE_CLEAR_FUNC(inline, INLINE_INODE);
2367	PAGE_PRIVATE_CLEAR_FUNC(gcing, ONGOING_MIGRATION);
2368	PAGE_PRIVATE_CLEAR_FUNC(dummy, DUMMY_WRITE);
2369
2370	static inline unsigned long get_page_private_data(struct page *page)
2371	{
2372	unsigned long data = page_private(page);
2373
2374	if (!test_bit(PAGE_PRIVATE_NOT_POINTER, &data))
2375	return 0;
2376	return data >> PAGE_PRIVATE_MAX;
2377	}
2378
2379	static inline void set_page_private_data(struct page *page, unsigned long data)
2380	{
2381	if (!PagePrivate(page))
2382	attach_page_private(page, data: (void *)0);
2383	set_bit(nr: PAGE_PRIVATE_NOT_POINTER, addr: &page_private(page));
2384	page_private(page) |= data << PAGE_PRIVATE_MAX;
2385	}
2386
2387	static inline void clear_page_private_data(struct page *page)
2388	{
2389	page_private(page) &= GENMASK(PAGE_PRIVATE_MAX - 1, 0);
2390	if (page_private(page) == BIT(PAGE_PRIVATE_NOT_POINTER))
2391	detach_page_private(page);
2392	}
2393
2394	static inline void clear_page_private_all(struct page *page)
2395	{
2396	clear_page_private_data(page);
2397	clear_page_private_reference(page);
2398	clear_page_private_gcing(page);
2399	clear_page_private_inline(page);
2400
2401	f2fs_bug_on(F2FS_P_SB(page), page_private(page));
2402	}
2403
2404	static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
2405	struct inode *inode,
2406	block_t count)
2407	{
2408	blkcnt_t sectors = count << F2FS_LOG_SECTORS_PER_BLOCK;
2409
2410	spin_lock(lock: &sbi->stat_lock);
2411	f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
2412	sbi->total_valid_block_count -= (block_t)count;
2413	if (sbi->reserved_blocks &&
2414	sbi->current_reserved_blocks < sbi->reserved_blocks)
2415	sbi->current_reserved_blocks = min(sbi->reserved_blocks,
2416	sbi->current_reserved_blocks + count);
2417	spin_unlock(lock: &sbi->stat_lock);
2418	if (unlikely(inode->i_blocks < sectors)) {
2419	f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu, sectors:%llu",
2420	inode->i_ino,
2421	(unsigned long long)inode->i_blocks,
2422	(unsigned long long)sectors);
2423	set_sbi_flag(sbi, type: SBI_NEED_FSCK);
2424	return;
2425	}
2426	f2fs_i_blocks_write(inode, count, false, true);
2427	}
2428
2429	static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
2430	{
2431	atomic_inc(v: &sbi->nr_pages[count_type]);
2432
2433	if (count_type == F2FS_DIRTY_DENTS ||
2434	count_type == F2FS_DIRTY_NODES ||
2435	count_type == F2FS_DIRTY_META ||
2436	count_type == F2FS_DIRTY_QDATA ||
2437	count_type == F2FS_DIRTY_IMETA)
2438	set_sbi_flag(sbi, type: SBI_IS_DIRTY);
2439	}
2440
2441	static inline void inode_inc_dirty_pages(struct inode *inode)
2442	{
2443	atomic_inc(v: &F2FS_I(inode)->dirty_pages);
2444	inc_page_count(sbi: F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
2445	F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
2446	if (IS_NOQUOTA(inode))
2447	inc_page_count(sbi: F2FS_I_SB(inode), count_type: F2FS_DIRTY_QDATA);
2448	}
2449
2450	static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
2451	{
2452	atomic_dec(v: &sbi->nr_pages[count_type]);
2453	}
2454
2455	static inline void inode_dec_dirty_pages(struct inode *inode)
2456	{
2457	if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
2458	!S_ISLNK(inode->i_mode))
2459	return;
2460
2461	atomic_dec(v: &F2FS_I(inode)->dirty_pages);
2462	dec_page_count(sbi: F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
2463	F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
2464	if (IS_NOQUOTA(inode))
2465	dec_page_count(sbi: F2FS_I_SB(inode), count_type: F2FS_DIRTY_QDATA);
2466	}
2467
2468	static inline void inc_atomic_write_cnt(struct inode *inode)
2469	{
2470	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2471	struct f2fs_inode_info *fi = F2FS_I(inode);
2472	u64 current_write;
2473
2474	fi->atomic_write_cnt++;
2475	atomic64_inc(v: &sbi->current_atomic_write);
2476	current_write = atomic64_read(v: &sbi->current_atomic_write);
2477	if (current_write > sbi->peak_atomic_write)
2478	sbi->peak_atomic_write = current_write;
2479	}
2480
2481	static inline void release_atomic_write_cnt(struct inode *inode)
2482	{
2483	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2484	struct f2fs_inode_info *fi = F2FS_I(inode);
2485
2486	atomic64_sub(i: fi->atomic_write_cnt, v: &sbi->current_atomic_write);
2487	fi->atomic_write_cnt = 0;
2488	}
2489
2490	static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
2491	{
2492	return atomic_read(v: &sbi->nr_pages[count_type]);
2493	}
2494
2495	static inline int get_dirty_pages(struct inode *inode)
2496	{
2497	return atomic_read(v: &F2FS_I(inode)->dirty_pages);
2498	}
2499
2500	static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
2501	{
2502	unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
2503	unsigned int segs = (get_pages(sbi, count_type: block_type) + pages_per_sec - 1) >>
2504	sbi->log_blocks_per_seg;
2505
2506	return segs / sbi->segs_per_sec;
2507	}
2508
2509	static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
2510	{
2511	return sbi->total_valid_block_count;
2512	}
2513
2514	static inline block_t discard_blocks(struct f2fs_sb_info *sbi)
2515	{
2516	return sbi->discard_blks;
2517	}
2518
2519	static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
2520	{
2521	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2522
2523	/* return NAT or SIT bitmap */
2524	if (flag == NAT_BITMAP)
2525	return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2526	else if (flag == SIT_BITMAP)
2527	return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2528
2529	return 0;
2530	}
2531
2532	static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
2533	{
2534	return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
2535	}
2536
2537	static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
2538	{
2539	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2540	void *tmp_ptr = &ckpt->sit_nat_version_bitmap;
2541	int offset;
2542
2543	if (is_set_ckpt_flags(sbi, CP_LARGE_NAT_BITMAP_FLAG)) {
2544	offset = (flag == SIT_BITMAP) ?
2545	le32_to_cpu(ckpt->nat_ver_bitmap_bytesize) : 0;
2546	/*
2547	* if large_nat_bitmap feature is enabled, leave checksum
2548	* protection for all nat/sit bitmaps.
2549	*/
2550	return tmp_ptr + offset + sizeof(__le32);
2551	}
2552
2553	if (__cp_payload(sbi) > 0) {
2554	if (flag == NAT_BITMAP)
2555	return tmp_ptr;
2556	else
2557	return (unsigned char *)ckpt + F2FS_BLKSIZE;
2558	} else {
2559	offset = (flag == NAT_BITMAP) ?
2560	le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
2561	return tmp_ptr + offset;
2562	}
2563	}
2564
2565	static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
2566	{
2567	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
2568
2569	if (sbi->cur_cp_pack == 2)
2570	start_addr += sbi->blocks_per_seg;
2571	return start_addr;
2572	}
2573
2574	static inline block_t __start_cp_next_addr(struct f2fs_sb_info *sbi)
2575	{
2576	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
2577
2578	if (sbi->cur_cp_pack == 1)
2579	start_addr += sbi->blocks_per_seg;
2580	return start_addr;
2581	}
2582
2583	static inline void __set_cp_next_pack(struct f2fs_sb_info *sbi)
2584	{
2585	sbi->cur_cp_pack = (sbi->cur_cp_pack == 1) ? 2 : 1;
2586	}
2587
2588	static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
2589	{
2590	return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
2591	}
2592
2593	extern void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync);
2594	static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
2595	struct inode *inode, bool is_inode)
2596	{
2597	block_t valid_block_count;
2598	unsigned int valid_node_count, user_block_count;
2599	int err;
2600
2601	if (is_inode) {
2602	if (inode) {
2603	err = dquot_alloc_inode(inode);
2604	if (err)
2605	return err;
2606	}
2607	} else {
2608	err = dquot_reserve_block(inode, nr: 1);
2609	if (err)
2610	return err;
2611	}
2612
2613	if (time_to_inject(sbi, FAULT_BLOCK))
2614	goto enospc;
2615
2616	spin_lock(lock: &sbi->stat_lock);
2617
2618	valid_block_count = sbi->total_valid_block_count +
2619	sbi->current_reserved_blocks + 1;
2620
2621	if (!__allow_reserved_blocks(sbi, inode, cap: false))
2622	valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks;
2623
2624	if (F2FS_IO_ALIGNED(sbi))
2625	valid_block_count += sbi->blocks_per_seg *
2626	SM_I(sbi)->additional_reserved_segments;
2627
2628	user_block_count = sbi->user_block_count;
2629	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2630	user_block_count -= sbi->unusable_block_count;
2631
2632	if (unlikely(valid_block_count > user_block_count)) {
2633	spin_unlock(lock: &sbi->stat_lock);
2634	goto enospc;
2635	}
2636
2637	valid_node_count = sbi->total_valid_node_count + 1;
2638	if (unlikely(valid_node_count > sbi->total_node_count)) {
2639	spin_unlock(lock: &sbi->stat_lock);
2640	goto enospc;
2641	}
2642
2643	sbi->total_valid_node_count++;
2644	sbi->total_valid_block_count++;
2645	spin_unlock(lock: &sbi->stat_lock);
2646
2647	if (inode) {
2648	if (is_inode)
2649	f2fs_mark_inode_dirty_sync(inode, sync: true);
2650	else
2651	f2fs_i_blocks_write(inode, 1, true, true);
2652	}
2653
2654	percpu_counter_inc(fbc: &sbi->alloc_valid_block_count);
2655	return 0;
2656
2657	enospc:
2658	if (is_inode) {
2659	if (inode)
2660	dquot_free_inode(inode);
2661	} else {
2662	dquot_release_reservation_block(inode, nr: 1);
2663	}
2664	return -ENOSPC;
2665	}
2666
2667	static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
2668	struct inode *inode, bool is_inode)
2669	{
2670	spin_lock(lock: &sbi->stat_lock);
2671
2672	if (unlikely(!sbi->total_valid_block_count ||
2673	!sbi->total_valid_node_count)) {
2674	f2fs_warn(sbi, "dec_valid_node_count: inconsistent block counts, total_valid_block:%u, total_valid_node:%u",
2675	sbi->total_valid_block_count,
2676	sbi->total_valid_node_count);
2677	set_sbi_flag(sbi, type: SBI_NEED_FSCK);
2678	} else {
2679	sbi->total_valid_block_count--;
2680	sbi->total_valid_node_count--;
2681	}
2682
2683	if (sbi->reserved_blocks &&
2684	sbi->current_reserved_blocks < sbi->reserved_blocks)
2685	sbi->current_reserved_blocks++;
2686
2687	spin_unlock(lock: &sbi->stat_lock);
2688
2689	if (is_inode) {
2690	dquot_free_inode(inode);
2691	} else {
2692	if (unlikely(inode->i_blocks == 0)) {
2693	f2fs_warn(sbi, "dec_valid_node_count: inconsistent i_blocks, ino:%lu, iblocks:%llu",
2694	inode->i_ino,
2695	(unsigned long long)inode->i_blocks);
2696	set_sbi_flag(sbi, type: SBI_NEED_FSCK);
2697	return;
2698	}
2699	f2fs_i_blocks_write(inode, 1, false, true);
2700	}
2701	}
2702
2703	static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
2704	{
2705	return sbi->total_valid_node_count;
2706	}
2707
2708	static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
2709	{
2710	percpu_counter_inc(fbc: &sbi->total_valid_inode_count);
2711	}
2712
2713	static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
2714	{
2715	percpu_counter_dec(fbc: &sbi->total_valid_inode_count);
2716	}
2717
2718	static inline s64 valid_inode_count(struct f2fs_sb_info *sbi)
2719	{
2720	return percpu_counter_sum_positive(fbc: &sbi->total_valid_inode_count);
2721	}
2722
2723	static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
2724	pgoff_t index, bool for_write)
2725	{
2726	struct page *page;
2727	unsigned int flags;
2728
2729	if (IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) {
2730	if (!for_write)
2731	page = find_get_page_flags(mapping, offset: index,
2732	FGP_LOCK | FGP_ACCESSED);
2733	else
2734	page = find_lock_page(mapping, index);
2735	if (page)
2736	return page;
2737
2738	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC))
2739	return NULL;
2740	}
2741
2742	if (!for_write)
2743	return grab_cache_page(mapping, index);
2744
2745	flags = memalloc_nofs_save();
2746	page = grab_cache_page_write_begin(mapping, index);
2747	memalloc_nofs_restore(flags);
2748
2749	return page;
2750	}
2751
2752	static inline struct page *f2fs_pagecache_get_page(
2753	struct address_space *mapping, pgoff_t index,
2754	fgf_t fgp_flags, gfp_t gfp_mask)
2755	{
2756	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_GET))
2757	return NULL;
2758
2759	return pagecache_get_page(mapping, index, fgp_flags, gfp: gfp_mask);
2760	}
2761
2762	static inline void f2fs_put_page(struct page *page, int unlock)
2763	{
2764	if (!page)
2765	return;
2766
2767	if (unlock) {
2768	f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
2769	unlock_page(page);
2770	}
2771	put_page(page);
2772	}
2773
2774	static inline void f2fs_put_dnode(struct dnode_of_data *dn)
2775	{
2776	if (dn->node_page)
2777	f2fs_put_page(page: dn->node_page, unlock: 1);
2778	if (dn->inode_page && dn->node_page != dn->inode_page)
2779	f2fs_put_page(page: dn->inode_page, unlock: 0);
2780	dn->node_page = NULL;
2781	dn->inode_page = NULL;
2782	}
2783
2784	static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
2785	size_t size)
2786	{
2787	return kmem_cache_create(name, size, align: 0, SLAB_RECLAIM_ACCOUNT, NULL);
2788	}
2789
2790	static inline void *f2fs_kmem_cache_alloc_nofail(struct kmem_cache *cachep,
2791	gfp_t flags)
2792	{
2793	void *entry;
2794
2795	entry = kmem_cache_alloc(cachep, flags);
2796	if (!entry)
2797	entry = kmem_cache_alloc(cachep, flags: flags | __GFP_NOFAIL);
2798	return entry;
2799	}
2800
2801	static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
2802	gfp_t flags, bool nofail, struct f2fs_sb_info *sbi)
2803	{
2804	if (nofail)
2805	return f2fs_kmem_cache_alloc_nofail(cachep, flags);
2806
2807	if (time_to_inject(sbi, FAULT_SLAB_ALLOC))
2808	return NULL;
2809
2810	return kmem_cache_alloc(cachep, flags);
2811	}
2812
2813	static inline bool is_inflight_io(struct f2fs_sb_info *sbi, int type)
2814	{
2815	if (get_pages(sbi, count_type: F2FS_RD_DATA) || get_pages(sbi, count_type: F2FS_RD_NODE) ||
2816	get_pages(sbi, count_type: F2FS_RD_META) || get_pages(sbi, count_type: F2FS_WB_DATA) ||
2817	get_pages(sbi, count_type: F2FS_WB_CP_DATA) ||
2818	get_pages(sbi, count_type: F2FS_DIO_READ) ||
2819	get_pages(sbi, count_type: F2FS_DIO_WRITE))
2820	return true;
2821
2822	if (type != DISCARD_TIME && SM_I(sbi) && SM_I(sbi)->dcc_info &&
2823	atomic_read(v: &SM_I(sbi)->dcc_info->queued_discard))
2824	return true;
2825
2826	if (SM_I(sbi) && SM_I(sbi)->fcc_info &&
2827	atomic_read(v: &SM_I(sbi)->fcc_info->queued_flush))
2828	return true;
2829	return false;
2830	}
2831
2832	static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
2833	{
2834	if (sbi->gc_mode == GC_URGENT_HIGH)
2835	return true;
2836
2837	if (is_inflight_io(sbi, type))
2838	return false;
2839
2840	if (sbi->gc_mode == GC_URGENT_MID)
2841	return true;
2842
2843	if (sbi->gc_mode == GC_URGENT_LOW &&
2844	(type == DISCARD_TIME || type == GC_TIME))
2845	return true;
2846
2847	return f2fs_time_over(sbi, type);
2848	}
2849
2850	static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
2851	unsigned long index, void *item)
2852	{
2853	while (radix_tree_insert(root, index, item))
2854	cond_resched();
2855	}
2856
2857	#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
2858
2859	static inline bool IS_INODE(struct page *page)
2860	{
2861	struct f2fs_node *p = F2FS_NODE(page);
2862
2863	return RAW_IS_INODE(p);
2864	}
2865
2866	static inline int offset_in_addr(struct f2fs_inode *i)
2867	{
2868	return (i->i_inline & F2FS_EXTRA_ATTR) ?
2869	(le16_to_cpu(i->i_extra_isize) / sizeof(__le32)) : 0;
2870	}
2871
2872	static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
2873	{
2874	return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
2875	}
2876
2877	static inline int f2fs_has_extra_attr(struct inode *inode);
2878	static inline block_t data_blkaddr(struct inode *inode,
2879	struct page *node_page, unsigned int offset)
2880	{
2881	struct f2fs_node *raw_node;
2882	__le32 *addr_array;
2883	int base = 0;
2884	bool is_inode = IS_INODE(page: node_page);
2885
2886	raw_node = F2FS_NODE(page: node_page);
2887
2888	if (is_inode) {
2889	if (!inode)
2890	/* from GC path only */
2891	base = offset_in_addr(i: &raw_node->i);
2892	else if (f2fs_has_extra_attr(inode))
2893	base = get_extra_isize(inode);
2894	}
2895
2896	addr_array = blkaddr_in_node(node: raw_node);
2897	return le32_to_cpu(addr_array[base + offset]);
2898	}
2899
2900	static inline block_t f2fs_data_blkaddr(struct dnode_of_data *dn)
2901	{
2902	return data_blkaddr(inode: dn->inode, node_page: dn->node_page, offset: dn->ofs_in_node);
2903	}
2904
2905	static inline int f2fs_test_bit(unsigned int nr, char *addr)
2906	{
2907	int mask;
2908
2909	addr += (nr >> 3);
2910	mask = BIT(7 - (nr & 0x07));
2911	return mask & *addr;
2912	}
2913
2914	static inline void f2fs_set_bit(unsigned int nr, char *addr)
2915	{
2916	int mask;
2917
2918	addr += (nr >> 3);
2919	mask = BIT(7 - (nr & 0x07));
2920	*addr |= mask;
2921	}
2922
2923	static inline void f2fs_clear_bit(unsigned int nr, char *addr)
2924	{
2925	int mask;
2926
2927	addr += (nr >> 3);
2928	mask = BIT(7 - (nr & 0x07));
2929	*addr &= ~mask;
2930	}
2931
2932	static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
2933	{
2934	int mask;
2935	int ret;
2936
2937	addr += (nr >> 3);
2938	mask = BIT(7 - (nr & 0x07));
2939	ret = mask & *addr;
2940	*addr |= mask;
2941	return ret;
2942	}
2943
2944	static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
2945	{
2946	int mask;
2947	int ret;
2948
2949	addr += (nr >> 3);
2950	mask = BIT(7 - (nr & 0x07));
2951	ret = mask & *addr;
2952	*addr &= ~mask;
2953	return ret;
2954	}
2955
2956	static inline void f2fs_change_bit(unsigned int nr, char *addr)
2957	{
2958	int mask;
2959
2960	addr += (nr >> 3);
2961	mask = BIT(7 - (nr & 0x07));
2962	*addr ^= mask;
2963	}
2964
2965	/*
2966	* On-disk inode flags (f2fs_inode::i_flags)
2967	*/
2968	#define F2FS_COMPR_FL 0x00000004 /* Compress file */
2969	#define F2FS_SYNC_FL 0x00000008 /* Synchronous updates */
2970	#define F2FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
2971	#define F2FS_APPEND_FL 0x00000020 /* writes to file may only append */
2972	#define F2FS_NODUMP_FL 0x00000040 /* do not dump file */
2973	#define F2FS_NOATIME_FL 0x00000080 /* do not update atime */
2974	#define F2FS_NOCOMP_FL 0x00000400 /* Don't compress */
2975	#define F2FS_INDEX_FL 0x00001000 /* hash-indexed directory */
2976	#define F2FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
2977	#define F2FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
2978	#define F2FS_CASEFOLD_FL 0x40000000 /* Casefolded file */
2979
2980	#define F2FS_QUOTA_DEFAULT_FL (F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL)
2981
2982	/* Flags that should be inherited by new inodes from their parent. */
2983	#define F2FS_FL_INHERITED (F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL | \
2984	F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL | \
2985	F2FS_CASEFOLD_FL)
2986
2987	/* Flags that are appropriate for regular files (all but dir-specific ones). */
2988	#define F2FS_REG_FLMASK (~(F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL | \
2989	F2FS_CASEFOLD_FL))
2990
2991	/* Flags that are appropriate for non-directories/regular files. */
2992	#define F2FS_OTHER_FLMASK (F2FS_NODUMP_FL | F2FS_NOATIME_FL)
2993
2994	static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
2995	{
2996	if (S_ISDIR(mode))
2997	return flags;
2998	else if (S_ISREG(mode))
2999	return flags & F2FS_REG_FLMASK;
3000	else
3001	return flags & F2FS_OTHER_FLMASK;
3002	}
3003
3004	static inline void __mark_inode_dirty_flag(struct inode *inode,
3005	int flag, bool set)
3006	{
3007	switch (flag) {
3008	case FI_INLINE_XATTR:
3009	case FI_INLINE_DATA:
3010	case FI_INLINE_DENTRY:
3011	case FI_NEW_INODE:
3012	if (set)
3013	return;
3014	fallthrough;
3015	case FI_DATA_EXIST:
3016	case FI_INLINE_DOTS:
3017	case FI_PIN_FILE:
3018	case FI_COMPRESS_RELEASED:
3019	f2fs_mark_inode_dirty_sync(inode, sync: true);
3020	}
3021	}
3022
3023	static inline void set_inode_flag(struct inode *inode, int flag)
3024	{
3025	set_bit(nr: flag, addr: F2FS_I(inode)->flags);
3026	__mark_inode_dirty_flag(inode, flag, set: true);
3027	}
3028
3029	static inline int is_inode_flag_set(struct inode *inode, int flag)
3030	{
3031	return test_bit(flag, F2FS_I(inode)->flags);
3032	}
3033
3034	static inline void clear_inode_flag(struct inode *inode, int flag)
3035	{
3036	clear_bit(nr: flag, addr: F2FS_I(inode)->flags);
3037	__mark_inode_dirty_flag(inode, flag, set: false);
3038	}
3039
3040	static inline bool f2fs_verity_in_progress(struct inode *inode)
3041	{
3042	return IS_ENABLED(CONFIG_FS_VERITY) &&
3043	is_inode_flag_set(inode, flag: FI_VERITY_IN_PROGRESS);
3044	}
3045
3046	static inline void set_acl_inode(struct inode *inode, umode_t mode)
3047	{
3048	F2FS_I(inode)->i_acl_mode = mode;
3049	set_inode_flag(inode, flag: FI_ACL_MODE);
3050	f2fs_mark_inode_dirty_sync(inode, sync: false);
3051	}
3052
3053	static inline void f2fs_i_links_write(struct inode *inode, bool inc)
3054	{
3055	if (inc)
3056	inc_nlink(inode);
3057	else
3058	drop_nlink(inode);
3059	f2fs_mark_inode_dirty_sync(inode, sync: true);
3060	}
3061
3062	static inline void f2fs_i_blocks_write(struct inode *inode,
3063	block_t diff, bool add, bool claim)
3064	{
3065	bool clean = !is_inode_flag_set(inode, flag: FI_DIRTY_INODE);
3066	bool recover = is_inode_flag_set(inode, flag: FI_AUTO_RECOVER);
3067
3068	/* add = 1, claim = 1 should be dquot_reserve_block in pair */
3069	if (add) {
3070	if (claim)
3071	dquot_claim_block(inode, nr: diff);
3072	else
3073	dquot_alloc_block_nofail(inode, nr: diff);
3074	} else {
3075	dquot_free_block(inode, nr: diff);
3076	}
3077
3078	f2fs_mark_inode_dirty_sync(inode, sync: true);
3079	if (clean || recover)
3080	set_inode_flag(inode, flag: FI_AUTO_RECOVER);
3081	}
3082
3083	static inline bool f2fs_is_atomic_file(struct inode *inode);
3084
3085	static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size)
3086	{
3087	bool clean = !is_inode_flag_set(inode, flag: FI_DIRTY_INODE);
3088	bool recover = is_inode_flag_set(inode, flag: FI_AUTO_RECOVER);
3089
3090	if (i_size_read(inode) == i_size)
3091	return;
3092
3093	i_size_write(inode, i_size);
3094
3095	if (f2fs_is_atomic_file(inode))
3096	return;
3097
3098	f2fs_mark_inode_dirty_sync(inode, sync: true);
3099	if (clean || recover)
3100	set_inode_flag(inode, flag: FI_AUTO_RECOVER);
3101	}
3102
3103	static inline void f2fs_i_depth_write(struct inode *inode, unsigned int depth)
3104	{
3105	F2FS_I(inode)->i_current_depth = depth;
3106	f2fs_mark_inode_dirty_sync(inode, sync: true);
3107	}
3108
3109	static inline void f2fs_i_gc_failures_write(struct inode *inode,
3110	unsigned int count)
3111	{
3112	F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] = count;
3113	f2fs_mark_inode_dirty_sync(inode, sync: true);
3114	}
3115
3116	static inline void f2fs_i_xnid_write(struct inode *inode, nid_t xnid)
3117	{
3118	F2FS_I(inode)->i_xattr_nid = xnid;
3119	f2fs_mark_inode_dirty_sync(inode, sync: true);
3120	}
3121
3122	static inline void f2fs_i_pino_write(struct inode *inode, nid_t pino)
3123	{
3124	F2FS_I(inode)->i_pino = pino;
3125	f2fs_mark_inode_dirty_sync(inode, sync: true);
3126	}
3127
3128	static inline void get_inline_info(struct inode *inode, struct f2fs_inode *ri)
3129	{
3130	struct f2fs_inode_info *fi = F2FS_I(inode);
3131
3132	if (ri->i_inline & F2FS_INLINE_XATTR)
3133	set_bit(nr: FI_INLINE_XATTR, addr: fi->flags);
3134	if (ri->i_inline & F2FS_INLINE_DATA)
3135	set_bit(nr: FI_INLINE_DATA, addr: fi->flags);
3136	if (ri->i_inline & F2FS_INLINE_DENTRY)
3137	set_bit(nr: FI_INLINE_DENTRY, addr: fi->flags);
3138	if (ri->i_inline & F2FS_DATA_EXIST)
3139	set_bit(nr: FI_DATA_EXIST, addr: fi->flags);
3140	if (ri->i_inline & F2FS_INLINE_DOTS)
3141	set_bit(nr: FI_INLINE_DOTS, addr: fi->flags);
3142	if (ri->i_inline & F2FS_EXTRA_ATTR)
3143	set_bit(nr: FI_EXTRA_ATTR, addr: fi->flags);
3144	if (ri->i_inline & F2FS_PIN_FILE)
3145	set_bit(nr: FI_PIN_FILE, addr: fi->flags);
3146	if (ri->i_inline & F2FS_COMPRESS_RELEASED)
3147	set_bit(nr: FI_COMPRESS_RELEASED, addr: fi->flags);
3148	}
3149
3150	static inline void set_raw_inline(struct inode *inode, struct f2fs_inode *ri)
3151	{
3152	ri->i_inline = 0;
3153
3154	if (is_inode_flag_set(inode, flag: FI_INLINE_XATTR))
3155	ri->i_inline |= F2FS_INLINE_XATTR;
3156	if (is_inode_flag_set(inode, flag: FI_INLINE_DATA))
3157	ri->i_inline |= F2FS_INLINE_DATA;
3158	if (is_inode_flag_set(inode, flag: FI_INLINE_DENTRY))
3159	ri->i_inline |= F2FS_INLINE_DENTRY;
3160	if (is_inode_flag_set(inode, flag: FI_DATA_EXIST))
3161	ri->i_inline |= F2FS_DATA_EXIST;
3162	if (is_inode_flag_set(inode, flag: FI_INLINE_DOTS))
3163	ri->i_inline |= F2FS_INLINE_DOTS;
3164	if (is_inode_flag_set(inode, flag: FI_EXTRA_ATTR))
3165	ri->i_inline |= F2FS_EXTRA_ATTR;
3166	if (is_inode_flag_set(inode, flag: FI_PIN_FILE))
3167	ri->i_inline |= F2FS_PIN_FILE;
3168	if (is_inode_flag_set(inode, flag: FI_COMPRESS_RELEASED))
3169	ri->i_inline |= F2FS_COMPRESS_RELEASED;
3170	}
3171
3172	static inline int f2fs_has_extra_attr(struct inode *inode)
3173	{
3174	return is_inode_flag_set(inode, flag: FI_EXTRA_ATTR);
3175	}
3176
3177	static inline int f2fs_has_inline_xattr(struct inode *inode)
3178	{
3179	return is_inode_flag_set(inode, flag: FI_INLINE_XATTR);
3180	}
3181
3182	static inline int f2fs_compressed_file(struct inode *inode)
3183	{
3184	return S_ISREG(inode->i_mode) &&
3185	is_inode_flag_set(inode, flag: FI_COMPRESSED_FILE);
3186	}
3187
3188	static inline bool f2fs_need_compress_data(struct inode *inode)
3189	{
3190	int compress_mode = F2FS_OPTION(F2FS_I_SB(inode)).compress_mode;
3191
3192	if (!f2fs_compressed_file(inode))
3193	return false;
3194
3195	if (compress_mode == COMPR_MODE_FS)
3196	return true;
3197	else if (compress_mode == COMPR_MODE_USER &&
3198	is_inode_flag_set(inode, flag: FI_ENABLE_COMPRESS))
3199	return true;
3200
3201	return false;
3202	}
3203
3204	static inline unsigned int addrs_per_inode(struct inode *inode)
3205	{
3206	unsigned int addrs = CUR_ADDRS_PER_INODE(inode) -
3207	get_inline_xattr_addrs(inode);
3208
3209	if (!f2fs_compressed_file(inode))
3210	return addrs;
3211	return ALIGN_DOWN(addrs, F2FS_I(inode)->i_cluster_size);
3212	}
3213
3214	static inline unsigned int addrs_per_block(struct inode *inode)
3215	{
3216	if (!f2fs_compressed_file(inode))
3217	return DEF_ADDRS_PER_BLOCK;
3218	return ALIGN_DOWN(DEF_ADDRS_PER_BLOCK, F2FS_I(inode)->i_cluster_size);
3219	}
3220
3221	static inline void *inline_xattr_addr(struct inode *inode, struct page *page)
3222	{
3223	struct f2fs_inode *ri = F2FS_INODE(page);
3224
3225	return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
3226	get_inline_xattr_addrs(inode)]);
3227	}
3228
3229	static inline int inline_xattr_size(struct inode *inode)
3230	{
3231	if (f2fs_has_inline_xattr(inode))
3232	return get_inline_xattr_addrs(inode) * sizeof(__le32);
3233	return 0;
3234	}
3235
3236	/*
3237	* Notice: check inline_data flag without inode page lock is unsafe.
3238	* It could change at any time by f2fs_convert_inline_page().
3239	*/
3240	static inline int f2fs_has_inline_data(struct inode *inode)
3241	{
3242	return is_inode_flag_set(inode, flag: FI_INLINE_DATA);
3243	}
3244
3245	static inline int f2fs_exist_data(struct inode *inode)
3246	{
3247	return is_inode_flag_set(inode, flag: FI_DATA_EXIST);
3248	}
3249
3250	static inline int f2fs_has_inline_dots(struct inode *inode)
3251	{
3252	return is_inode_flag_set(inode, flag: FI_INLINE_DOTS);
3253	}
3254
3255	static inline int f2fs_is_mmap_file(struct inode *inode)
3256	{
3257	return is_inode_flag_set(inode, flag: FI_MMAP_FILE);
3258	}
3259
3260	static inline bool f2fs_is_pinned_file(struct inode *inode)
3261	{
3262	return is_inode_flag_set(inode, flag: FI_PIN_FILE);
3263	}
3264
3265	static inline bool f2fs_is_atomic_file(struct inode *inode)
3266	{
3267	return is_inode_flag_set(inode, flag: FI_ATOMIC_FILE);
3268	}
3269
3270	static inline bool f2fs_is_cow_file(struct inode *inode)
3271	{
3272	return is_inode_flag_set(inode, flag: FI_COW_FILE);
3273	}
3274
3275	static inline bool f2fs_is_first_block_written(struct inode *inode)
3276	{
3277	return is_inode_flag_set(inode, flag: FI_FIRST_BLOCK_WRITTEN);
3278	}
3279
3280	static inline bool f2fs_is_drop_cache(struct inode *inode)
3281	{
3282	return is_inode_flag_set(inode, flag: FI_DROP_CACHE);
3283	}
3284
3285	static inline void *inline_data_addr(struct inode *inode, struct page *page)
3286	{
3287	struct f2fs_inode *ri = F2FS_INODE(page);
3288	int extra_size = get_extra_isize(inode);
3289
3290	return (void *)&(ri->i_addr[extra_size + DEF_INLINE_RESERVED_SIZE]);
3291	}
3292
3293	static inline int f2fs_has_inline_dentry(struct inode *inode)
3294	{
3295	return is_inode_flag_set(inode, flag: FI_INLINE_DENTRY);
3296	}
3297
3298	static inline int is_file(struct inode *inode, int type)
3299	{
3300	return F2FS_I(inode)->i_advise & type;
3301	}
3302
3303	static inline void set_file(struct inode *inode, int type)
3304	{
3305	if (is_file(inode, type))
3306	return;
3307	F2FS_I(inode)->i_advise |= type;
3308	f2fs_mark_inode_dirty_sync(inode, sync: true);
3309	}
3310
3311	static inline void clear_file(struct inode *inode, int type)
3312	{
3313	if (!is_file(inode, type))
3314	return;
3315	F2FS_I(inode)->i_advise &= ~type;
3316	f2fs_mark_inode_dirty_sync(inode, sync: true);
3317	}
3318
3319	static inline bool f2fs_is_time_consistent(struct inode *inode)
3320	{
3321	struct timespec64 ts = inode_get_atime(inode);
3322
3323	if (!timespec64_equal(a: F2FS_I(inode)->i_disk_time, b: &ts))
3324	return false;
3325	ts = inode_get_ctime(inode);
3326	if (!timespec64_equal(a: F2FS_I(inode)->i_disk_time + 1, b: &ts))
3327	return false;
3328	ts = inode_get_mtime(inode);
3329	if (!timespec64_equal(a: F2FS_I(inode)->i_disk_time + 2, b: &ts))
3330	return false;
3331	return true;
3332	}
3333
3334	static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync)
3335	{
3336	bool ret;
3337
3338	if (dsync) {
3339	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3340
3341	spin_lock(lock: &sbi->inode_lock[DIRTY_META]);
3342	ret = list_empty(head: &F2FS_I(inode)->gdirty_list);
3343	spin_unlock(lock: &sbi->inode_lock[DIRTY_META]);
3344	return ret;
3345	}
3346	if (!is_inode_flag_set(inode, flag: FI_AUTO_RECOVER) ||
3347	file_keep_isize(inode) ||
3348	i_size_read(inode) & ~PAGE_MASK)
3349	return false;
3350
3351	if (!f2fs_is_time_consistent(inode))
3352	return false;
3353
3354	spin_lock(lock: &F2FS_I(inode)->i_size_lock);
3355	ret = F2FS_I(inode)->last_disk_size == i_size_read(inode);
3356	spin_unlock(lock: &F2FS_I(inode)->i_size_lock);
3357
3358	return ret;
3359	}
3360
3361	static inline bool f2fs_readonly(struct super_block *sb)
3362	{
3363	return sb_rdonly(sb);
3364	}
3365
3366	static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
3367	{
3368	return is_set_ckpt_flags(sbi, CP_ERROR_FLAG);
3369	}
3370
3371	static inline bool is_dot_dotdot(const u8 *name, size_t len)
3372	{
3373	if (len == 1 && name[0] == '.')
3374	return true;
3375
3376	if (len == 2 && name[0] == '.' && name[1] == '.')
3377	return true;
3378
3379	return false;
3380	}
3381
3382	static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
3383	size_t size, gfp_t flags)
3384	{
3385	if (time_to_inject(sbi, FAULT_KMALLOC))
3386	return NULL;
3387
3388	return kmalloc(size, flags);
3389	}
3390
3391	static inline void *f2fs_getname(struct f2fs_sb_info *sbi)
3392	{
3393	if (time_to_inject(sbi, FAULT_KMALLOC))
3394	return NULL;
3395
3396	return __getname();
3397	}
3398
3399	static inline void f2fs_putname(char *buf)
3400	{
3401	__putname(buf);
3402	}
3403
3404	static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
3405	size_t size, gfp_t flags)
3406	{
3407	return f2fs_kmalloc(sbi, size, flags: flags | __GFP_ZERO);
3408	}
3409
3410	static inline void *f2fs_kvmalloc(struct f2fs_sb_info *sbi,
3411	size_t size, gfp_t flags)
3412	{
3413	if (time_to_inject(sbi, FAULT_KVMALLOC))
3414	return NULL;
3415
3416	return kvmalloc(size, flags);
3417	}
3418
3419	static inline void *f2fs_kvzalloc(struct f2fs_sb_info *sbi,
3420	size_t size, gfp_t flags)
3421	{
3422	return f2fs_kvmalloc(sbi, size, flags: flags | __GFP_ZERO);
3423	}
3424
3425	static inline int get_extra_isize(struct inode *inode)
3426	{
3427	return F2FS_I(inode)->i_extra_isize / sizeof(__le32);
3428	}
3429
3430	static inline int get_inline_xattr_addrs(struct inode *inode)
3431	{
3432	return F2FS_I(inode)->i_inline_xattr_size;
3433	}
3434
3435	#define f2fs_get_inode_mode(i) \
3436	((is_inode_flag_set(i, FI_ACL_MODE)) ? \
3437	(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
3438
3439	#define F2FS_MIN_EXTRA_ATTR_SIZE (sizeof(__le32))
3440
3441	#define F2FS_TOTAL_EXTRA_ATTR_SIZE \
3442	(offsetof(struct f2fs_inode, i_extra_end) - \
3443	offsetof(struct f2fs_inode, i_extra_isize)) \
3444
3445	#define F2FS_OLD_ATTRIBUTE_SIZE (offsetof(struct f2fs_inode, i_addr))
3446	#define F2FS_FITS_IN_INODE(f2fs_inode, extra_isize, field) \
3447	((offsetof(typeof(*(f2fs_inode)), field) + \
3448	sizeof((f2fs_inode)->field)) \
3449	<= (F2FS_OLD_ATTRIBUTE_SIZE + (extra_isize))) \
3450
3451	#define __is_large_section(sbi) ((sbi)->segs_per_sec > 1)
3452
3453	#define __is_meta_io(fio) (PAGE_TYPE_OF_BIO((fio)->type) == META)
3454
3455	bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
3456	block_t blkaddr, int type);
3457	static inline void verify_blkaddr(struct f2fs_sb_info *sbi,
3458	block_t blkaddr, int type)
3459	{
3460	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, type)) {
3461	f2fs_err(sbi, "invalid blkaddr: %u, type: %d, run fsck to fix.",
3462	blkaddr, type);
3463	f2fs_bug_on(sbi, 1);
3464	}
3465	}
3466
3467	static inline bool __is_valid_data_blkaddr(block_t blkaddr)
3468	{
3469	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR ||
3470	blkaddr == COMPRESS_ADDR)
3471	return false;
3472	return true;
3473	}
3474
3475	/*
3476	* file.c
3477	*/
3478	int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3479	int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock);
3480	int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock);
3481	int f2fs_truncate(struct inode *inode);
3482	int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path,
3483	struct kstat *stat, u32 request_mask, unsigned int flags);
3484	int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
3485	struct iattr *attr);
3486	int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end);
3487	void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count);
3488	int f2fs_precache_extents(struct inode *inode);
3489	int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
3490	int f2fs_fileattr_set(struct mnt_idmap *idmap,
3491	struct dentry *dentry, struct fileattr *fa);
3492	long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
3493	long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3494	int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid);
3495	int f2fs_pin_file_control(struct inode *inode, bool inc);
3496
3497	/*
3498	* inode.c
3499	*/
3500	void f2fs_set_inode_flags(struct inode *inode);
3501	bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page);
3502	void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page);
3503	struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
3504	struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
3505	int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
3506	void f2fs_update_inode(struct inode *inode, struct page *node_page);
3507	void f2fs_update_inode_page(struct inode *inode);
3508	int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc);
3509	void f2fs_evict_inode(struct inode *inode);
3510	void f2fs_handle_failed_inode(struct inode *inode);
3511
3512	/*
3513	* namei.c
3514	*/
3515	int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
3516	bool hot, bool set);
3517	struct dentry *f2fs_get_parent(struct dentry *child);
3518	int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
3519	struct inode **new_inode);
3520
3521	/*
3522	* dir.c
3523	*/
3524	int f2fs_init_casefolded_name(const struct inode *dir,
3525	struct f2fs_filename *fname);
3526	int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
3527	int lookup, struct f2fs_filename *fname);
3528	int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
3529	struct f2fs_filename *fname);
3530	void f2fs_free_filename(struct f2fs_filename *fname);
3531	struct f2fs_dir_entry *f2fs_find_target_dentry(const struct f2fs_dentry_ptr *d,
3532	const struct f2fs_filename *fname, int *max_slots);
3533	int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
3534	unsigned int start_pos, struct fscrypt_str *fstr);
3535	void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent,
3536	struct f2fs_dentry_ptr *d);
3537	struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
3538	const struct f2fs_filename *fname, struct page *dpage);
3539	void f2fs_update_parent_metadata(struct inode *dir, struct inode *inode,
3540	unsigned int current_depth);
3541	int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots);
3542	void f2fs_drop_nlink(struct inode *dir, struct inode *inode);
3543	struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
3544	const struct f2fs_filename *fname,
3545	struct page **res_page);
3546	struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
3547	const struct qstr *child, struct page **res_page);
3548	struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p);
3549	ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
3550	struct page **page);
3551	void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
3552	struct page *page, struct inode *inode);
3553	bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
3554	const struct f2fs_filename *fname);
3555	void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
3556	const struct fscrypt_str *name, f2fs_hash_t name_hash,
3557	unsigned int bit_pos);
3558	int f2fs_add_regular_entry(struct inode *dir, const struct f2fs_filename *fname,
3559	struct inode *inode, nid_t ino, umode_t mode);
3560	int f2fs_add_dentry(struct inode *dir, const struct f2fs_filename *fname,
3561	struct inode *inode, nid_t ino, umode_t mode);
3562	int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
3563	struct inode *inode, nid_t ino, umode_t mode);
3564	void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
3565	struct inode *dir, struct inode *inode);
3566	int f2fs_do_tmpfile(struct inode *inode, struct inode *dir);
3567	bool f2fs_empty_dir(struct inode *dir);
3568
3569	static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
3570	{
3571	if (fscrypt_is_nokey_name(dentry))
3572	return -ENOKEY;
3573	return f2fs_do_add_link(dir: d_inode(dentry: dentry->d_parent), name: &dentry->d_name,
3574	inode, ino: inode->i_ino, mode: inode->i_mode);
3575	}
3576
3577	/*
3578	* super.c
3579	*/
3580	int f2fs_inode_dirtied(struct inode *inode, bool sync);
3581	void f2fs_inode_synced(struct inode *inode);
3582	int f2fs_dquot_initialize(struct inode *inode);
3583	int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly);
3584	int f2fs_quota_sync(struct super_block *sb, int type);
3585	loff_t max_file_blocks(struct inode *inode);
3586	void f2fs_quota_off_umount(struct super_block *sb);
3587	void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag);
3588	void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
3589	bool irq_context);
3590	void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error);
3591	void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error);
3592	int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
3593	int f2fs_sync_fs(struct super_block *sb, int sync);
3594	int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
3595
3596	/*
3597	* hash.c
3598	*/
3599	void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname);
3600
3601	/*
3602	* node.c
3603	*/
3604	struct node_info;
3605
3606	int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid);
3607	bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type);
3608	bool f2fs_in_warm_node_list(struct f2fs_sb_info *sbi, struct page *page);
3609	void f2fs_init_fsync_node_info(struct f2fs_sb_info *sbi);
3610	void f2fs_del_fsync_node_entry(struct f2fs_sb_info *sbi, struct page *page);
3611	void f2fs_reset_fsync_node_info(struct f2fs_sb_info *sbi);
3612	int f2fs_need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid);
3613	bool f2fs_is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid);
3614	bool f2fs_need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino);
3615	int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
3616	struct node_info *ni, bool checkpoint_context);
3617	pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs);
3618	int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode);
3619	int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
3620	int f2fs_truncate_xattr_node(struct inode *inode);
3621	int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
3622	unsigned int seq_id);
3623	bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
3624	int f2fs_remove_inode_page(struct inode *inode);
3625	struct page *f2fs_new_inode_page(struct inode *inode);
3626	struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
3627	void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
3628	struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
3629	struct page *f2fs_get_node_page_ra(struct page *parent, int start);
3630	int f2fs_move_node_page(struct page *node_page, int gc_type);
3631	void f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
3632	int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
3633	struct writeback_control *wbc, bool atomic,
3634	unsigned int *seq_id);
3635	int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
3636	struct writeback_control *wbc,
3637	bool do_balance, enum iostat_type io_type);
3638	int f2fs_build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount);
3639	bool f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid);
3640	void f2fs_alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid);
3641	void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid);
3642	int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink);
3643	int f2fs_recover_inline_xattr(struct inode *inode, struct page *page);
3644	int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
3645	int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
3646	int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
3647	unsigned int segno, struct f2fs_summary_block *sum);
3648	void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
3649	int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
3650	int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
3651	void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
3652	int __init f2fs_create_node_manager_caches(void);
3653	void f2fs_destroy_node_manager_caches(void);
3654
3655	/*
3656	* segment.c
3657	*/
3658	bool f2fs_need_SSR(struct f2fs_sb_info *sbi);
3659	int f2fs_commit_atomic_write(struct inode *inode);
3660	void f2fs_abort_atomic_write(struct inode *inode, bool clean);
3661	void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need);
3662	void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg);
3663	int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino);
3664	int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi);
3665	int f2fs_flush_device_cache(struct f2fs_sb_info *sbi);
3666	void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free);
3667	void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr);
3668	bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr);
3669	int f2fs_start_discard_thread(struct f2fs_sb_info *sbi);
3670	void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi);
3671	void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi);
3672	bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi);
3673	void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
3674	struct cp_control *cpc);
3675	void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi);
3676	block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
3677	int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
3678	void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
3679	int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
3680	bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno);
3681	void f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi);
3682	void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi);
3683	void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi);
3684	void f2fs_get_new_segment(struct f2fs_sb_info *sbi,
3685	unsigned int *newseg, bool new_sec, int dir);
3686	void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
3687	unsigned int start, unsigned int end);
3688	void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force);
3689	void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
3690	int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
3691	bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
3692	struct cp_control *cpc);
3693	struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno);
3694	void f2fs_update_meta_page(struct f2fs_sb_info *sbi, void *src,
3695	block_t blk_addr);
3696	void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
3697	enum iostat_type io_type);
3698	void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio);
3699	void f2fs_outplace_write_data(struct dnode_of_data *dn,
3700	struct f2fs_io_info *fio);
3701	int f2fs_inplace_write_data(struct f2fs_io_info *fio);
3702	void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
3703	block_t old_blkaddr, block_t new_blkaddr,
3704	bool recover_curseg, bool recover_newaddr,
3705	bool from_gc);
3706	void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
3707	block_t old_addr, block_t new_addr,
3708	unsigned char version, bool recover_curseg,
3709	bool recover_newaddr);
3710	void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
3711	block_t old_blkaddr, block_t *new_blkaddr,
3712	struct f2fs_summary *sum, int type,
3713	struct f2fs_io_info *fio);
3714	void f2fs_update_device_state(struct f2fs_sb_info *sbi, nid_t ino,
3715	block_t blkaddr, unsigned int blkcnt);
3716	void f2fs_wait_on_page_writeback(struct page *page,
3717	enum page_type type, bool ordered, bool locked);
3718	void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr);
3719	void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
3720	block_t len);
3721	void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
3722	void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
3723	int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
3724	unsigned int val, int alloc);
3725	void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
3726	int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi);
3727	int f2fs_check_write_pointer(struct f2fs_sb_info *sbi);
3728	int f2fs_build_segment_manager(struct f2fs_sb_info *sbi);
3729	void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi);
3730	int __init f2fs_create_segment_manager_caches(void);
3731	void f2fs_destroy_segment_manager_caches(void);
3732	int f2fs_rw_hint_to_seg_type(enum rw_hint hint);
3733	unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
3734	unsigned int segno);
3735	unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
3736	unsigned int segno);
3737
3738	#define DEF_FRAGMENT_SIZE 4
3739	#define MIN_FRAGMENT_SIZE 1
3740	#define MAX_FRAGMENT_SIZE 512
3741
3742	static inline bool f2fs_need_rand_seg(struct f2fs_sb_info *sbi)
3743	{
3744	return F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG ||
3745	F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK;
3746	}
3747
3748	/*
3749	* checkpoint.c
3750	*/
3751	void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io,
3752	unsigned char reason);
3753	void f2fs_flush_ckpt_thread(struct f2fs_sb_info *sbi);
3754	struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
3755	struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
3756	struct page *f2fs_get_meta_page_retry(struct f2fs_sb_info *sbi, pgoff_t index);
3757	struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index);
3758	bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
3759	block_t blkaddr, int type);
3760	int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
3761	int type, bool sync);
3762	void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index,
3763	unsigned int ra_blocks);
3764	long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
3765	long nr_to_write, enum iostat_type io_type);
3766	void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
3767	void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
3768	void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all);
3769	bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode);
3770	void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
3771	unsigned int devidx, int type);
3772	bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
3773	unsigned int devidx, int type);
3774	int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi);
3775	void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi);
3776	void f2fs_add_orphan_inode(struct inode *inode);
3777	void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino);
3778	int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi);
3779	int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi);
3780	void f2fs_update_dirty_folio(struct inode *inode, struct folio *folio);
3781	void f2fs_remove_dirty_inode(struct inode *inode);
3782	int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type,
3783	bool from_cp);
3784	void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type);
3785	u64 f2fs_get_sectors_written(struct f2fs_sb_info *sbi);
3786	int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc);
3787	void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi);
3788	int __init f2fs_create_checkpoint_caches(void);
3789	void f2fs_destroy_checkpoint_caches(void);
3790	int f2fs_issue_checkpoint(struct f2fs_sb_info *sbi);
3791	int f2fs_start_ckpt_thread(struct f2fs_sb_info *sbi);
3792	void f2fs_stop_ckpt_thread(struct f2fs_sb_info *sbi);
3793	void f2fs_init_ckpt_req_control(struct f2fs_sb_info *sbi);
3794
3795	/*
3796	* data.c
3797	*/
3798	int __init f2fs_init_bioset(void);
3799	void f2fs_destroy_bioset(void);
3800	int f2fs_init_bio_entry_cache(void);
3801	void f2fs_destroy_bio_entry_cache(void);
3802	void f2fs_submit_read_bio(struct f2fs_sb_info *sbi, struct bio *bio,
3803	enum page_type type);
3804	int f2fs_init_write_merge_io(struct f2fs_sb_info *sbi);
3805	void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type);
3806	void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
3807	struct inode *inode, struct page *page,
3808	nid_t ino, enum page_type type);
3809	void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
3810	struct bio **bio, struct page *page);
3811	void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi);
3812	int f2fs_submit_page_bio(struct f2fs_io_info *fio);
3813	int f2fs_merge_page_bio(struct f2fs_io_info *fio);
3814	void f2fs_submit_page_write(struct f2fs_io_info *fio);
3815	struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
3816	block_t blk_addr, sector_t *sector);
3817	int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr);
3818	void f2fs_set_data_blkaddr(struct dnode_of_data *dn);
3819	void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr);
3820	int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count);
3821	int f2fs_reserve_new_block(struct dnode_of_data *dn);
3822	int f2fs_get_block_locked(struct dnode_of_data *dn, pgoff_t index);
3823	int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index);
3824	struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
3825	blk_opf_t op_flags, bool for_write, pgoff_t *next_pgofs);
3826	struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index,
3827	pgoff_t *next_pgofs);
3828	struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
3829	bool for_write);
3830	struct page *f2fs_get_new_data_page(struct inode *inode,
3831	struct page *ipage, pgoff_t index, bool new_i_size);
3832	int f2fs_do_write_data_page(struct f2fs_io_info *fio);
3833	int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, int flag);
3834	int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
3835	u64 start, u64 len);
3836	int f2fs_encrypt_one_page(struct f2fs_io_info *fio);
3837	bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio);
3838	bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio);
3839	int f2fs_write_single_data_page(struct page *page, int *submitted,
3840	struct bio **bio, sector_t *last_block,
3841	struct writeback_control *wbc,
3842	enum iostat_type io_type,
3843	int compr_blocks, bool allow_balance);
3844	void f2fs_write_failed(struct inode *inode, loff_t to);
3845	void f2fs_invalidate_folio(struct folio *folio, size_t offset, size_t length);
3846	bool f2fs_release_folio(struct folio *folio, gfp_t wait);
3847	bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len);
3848	void f2fs_clear_page_cache_dirty_tag(struct page *page);
3849	int f2fs_init_post_read_processing(void);
3850	void f2fs_destroy_post_read_processing(void);
3851	int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi);
3852	void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi);
3853	extern const struct iomap_ops f2fs_iomap_ops;
3854
3855	/*
3856	* gc.c
3857	*/
3858	int f2fs_start_gc_thread(struct f2fs_sb_info *sbi);
3859	void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi);
3860	block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
3861	int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control);
3862	void f2fs_build_gc_manager(struct f2fs_sb_info *sbi);
3863	int f2fs_resize_fs(struct file *filp, __u64 block_count);
3864	int __init f2fs_create_garbage_collection_cache(void);
3865	void f2fs_destroy_garbage_collection_cache(void);
3866	/* victim selection function for cleaning and SSR */
3867	int f2fs_get_victim(struct f2fs_sb_info *sbi, unsigned int *result,
3868	int gc_type, int type, char alloc_mode,
3869	unsigned long long age);
3870
3871	/*
3872	* recovery.c
3873	*/
3874	int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only);
3875	bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi);
3876	int __init f2fs_create_recovery_cache(void);
3877	void f2fs_destroy_recovery_cache(void);
3878
3879	/*
3880	* debug.c
3881	*/
3882	#ifdef CONFIG_F2FS_STAT_FS
3883	struct f2fs_stat_info {
3884	struct list_head stat_list;
3885	struct f2fs_sb_info *sbi;
3886	int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
3887	int main_area_segs, main_area_sections, main_area_zones;
3888	unsigned long long hit_cached[NR_EXTENT_CACHES];
3889	unsigned long long hit_rbtree[NR_EXTENT_CACHES];
3890	unsigned long long total_ext[NR_EXTENT_CACHES];
3891	unsigned long long hit_total[NR_EXTENT_CACHES];
3892	int ext_tree[NR_EXTENT_CACHES];
3893	int zombie_tree[NR_EXTENT_CACHES];
3894	int ext_node[NR_EXTENT_CACHES];
3895	/* to count memory footprint */
3896	unsigned long long ext_mem[NR_EXTENT_CACHES];
3897	/* for read extent cache */
3898	unsigned long long hit_largest;
3899	/* for block age extent cache */
3900	unsigned long long allocated_data_blocks;
3901	int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta;
3902	int ndirty_data, ndirty_qdata;
3903	unsigned int ndirty_dirs, ndirty_files, nquota_files, ndirty_all;
3904	int nats, dirty_nats, sits, dirty_sits;
3905	int free_nids, avail_nids, alloc_nids;
3906	int total_count, utilization;
3907	int nr_wb_cp_data, nr_wb_data;
3908	int nr_rd_data, nr_rd_node, nr_rd_meta;
3909	int nr_dio_read, nr_dio_write;
3910	unsigned int io_skip_bggc, other_skip_bggc;
3911	int nr_flushing, nr_flushed, flush_list_empty;
3912	int nr_discarding, nr_discarded;
3913	int nr_discard_cmd;
3914	unsigned int undiscard_blks;
3915	int nr_issued_ckpt, nr_total_ckpt, nr_queued_ckpt;
3916	unsigned int cur_ckpt_time, peak_ckpt_time;
3917	int inline_xattr, inline_inode, inline_dir, append, update, orphans;
3918	int compr_inode, swapfile_inode;
3919	unsigned long long compr_blocks;
3920	int aw_cnt, max_aw_cnt;
3921	unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;
3922	unsigned int bimodal, avg_vblocks;
3923	int util_free, util_valid, util_invalid;
3924	int rsvd_segs, overp_segs;
3925	int dirty_count, node_pages, meta_pages, compress_pages;
3926	int compress_page_hit;
3927	int prefree_count, free_segs, free_secs;
3928	int cp_call_count[MAX_CALL_TYPE], cp_count;
3929	int gc_call_count[MAX_CALL_TYPE];
3930	int gc_segs[2][2];
3931	int gc_secs[2][2];
3932	int tot_blks, data_blks, node_blks;
3933	int bg_data_blks, bg_node_blks;
3934	int curseg[NR_CURSEG_TYPE];
3935	int cursec[NR_CURSEG_TYPE];
3936	int curzone[NR_CURSEG_TYPE];
3937	unsigned int dirty_seg[NR_CURSEG_TYPE];
3938	unsigned int full_seg[NR_CURSEG_TYPE];
3939	unsigned int valid_blks[NR_CURSEG_TYPE];
3940
3941	unsigned int meta_count[META_MAX];
3942	unsigned int segment_count[2];
3943	unsigned int block_count[2];
3944	unsigned int inplace_count;
3945	unsigned long long base_mem, cache_mem, page_mem;
3946	};
3947
3948	static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
3949	{
3950	return (struct f2fs_stat_info *)sbi->stat_info;
3951	}
3952
3953	#define stat_inc_cp_call_count(sbi, foreground) \
3954	atomic_inc(&sbi->cp_call_count[(foreground)])
3955	#define stat_inc_cp_count(si) (F2FS_STAT(sbi)->cp_count++)
3956	#define stat_io_skip_bggc_count(sbi) ((sbi)->io_skip_bggc++)
3957	#define stat_other_skip_bggc_count(sbi) ((sbi)->other_skip_bggc++)
3958	#define stat_inc_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]++)
3959	#define stat_dec_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]--)
3960	#define stat_inc_total_hit(sbi, type) (atomic64_inc(&(sbi)->total_hit_ext[type]))
3961	#define stat_inc_rbtree_node_hit(sbi, type) (atomic64_inc(&(sbi)->read_hit_rbtree[type]))
3962	#define stat_inc_largest_node_hit(sbi) (atomic64_inc(&(sbi)->read_hit_largest))
3963	#define stat_inc_cached_node_hit(sbi, type) (atomic64_inc(&(sbi)->read_hit_cached[type]))
3964	#define stat_inc_inline_xattr(inode) \
3965	do { \
3966	if (f2fs_has_inline_xattr(inode)) \
3967	(atomic_inc(&F2FS_I_SB(inode)->inline_xattr)); \
3968	} while (0)
3969	#define stat_dec_inline_xattr(inode) \
3970	do { \
3971	if (f2fs_has_inline_xattr(inode)) \
3972	(atomic_dec(&F2FS_I_SB(inode)->inline_xattr)); \
3973	} while (0)
3974	#define stat_inc_inline_inode(inode) \
3975	do { \
3976	if (f2fs_has_inline_data(inode)) \
3977	(atomic_inc(&F2FS_I_SB(inode)->inline_inode)); \
3978	} while (0)
3979	#define stat_dec_inline_inode(inode) \
3980	do { \
3981	if (f2fs_has_inline_data(inode)) \
3982	(atomic_dec(&F2FS_I_SB(inode)->inline_inode)); \
3983	} while (0)
3984	#define stat_inc_inline_dir(inode) \
3985	do { \
3986	if (f2fs_has_inline_dentry(inode)) \
3987	(atomic_inc(&F2FS_I_SB(inode)->inline_dir)); \
3988	} while (0)
3989	#define stat_dec_inline_dir(inode) \
3990	do { \
3991	if (f2fs_has_inline_dentry(inode)) \
3992	(atomic_dec(&F2FS_I_SB(inode)->inline_dir)); \
3993	} while (0)
3994	#define stat_inc_compr_inode(inode) \
3995	do { \
3996	if (f2fs_compressed_file(inode)) \
3997	(atomic_inc(&F2FS_I_SB(inode)->compr_inode)); \
3998	} while (0)
3999	#define stat_dec_compr_inode(inode) \
4000	do { \
4001	if (f2fs_compressed_file(inode)) \
4002	(atomic_dec(&F2FS_I_SB(inode)->compr_inode)); \
4003	} while (0)
4004	#define stat_add_compr_blocks(inode, blocks) \
4005	(atomic64_add(blocks, &F2FS_I_SB(inode)->compr_blocks))
4006	#define stat_sub_compr_blocks(inode, blocks) \
4007	(atomic64_sub(blocks, &F2FS_I_SB(inode)->compr_blocks))
4008	#define stat_inc_swapfile_inode(inode) \
4009	(atomic_inc(&F2FS_I_SB(inode)->swapfile_inode))
4010	#define stat_dec_swapfile_inode(inode) \
4011	(atomic_dec(&F2FS_I_SB(inode)->swapfile_inode))
4012	#define stat_inc_atomic_inode(inode) \
4013	(atomic_inc(&F2FS_I_SB(inode)->atomic_files))
4014	#define stat_dec_atomic_inode(inode) \
4015	(atomic_dec(&F2FS_I_SB(inode)->atomic_files))
4016	#define stat_inc_meta_count(sbi, blkaddr) \
4017	do { \
4018	if (blkaddr < SIT_I(sbi)->sit_base_addr) \
4019	atomic_inc(&(sbi)->meta_count[META_CP]); \
4020	else if (blkaddr < NM_I(sbi)->nat_blkaddr) \
4021	atomic_inc(&(sbi)->meta_count[META_SIT]); \
4022	else if (blkaddr < SM_I(sbi)->ssa_blkaddr) \
4023	atomic_inc(&(sbi)->meta_count[META_NAT]); \
4024	else if (blkaddr < SM_I(sbi)->main_blkaddr) \
4025	atomic_inc(&(sbi)->meta_count[META_SSA]); \
4026	} while (0)
4027	#define stat_inc_seg_type(sbi, curseg) \
4028	((sbi)->segment_count[(curseg)->alloc_type]++)
4029	#define stat_inc_block_count(sbi, curseg) \
4030	((sbi)->block_count[(curseg)->alloc_type]++)
4031	#define stat_inc_inplace_blocks(sbi) \
4032	(atomic_inc(&(sbi)->inplace_count))
4033	#define stat_update_max_atomic_write(inode) \
4034	do { \
4035	int cur = atomic_read(&F2FS_I_SB(inode)->atomic_files); \
4036	int max = atomic_read(&F2FS_I_SB(inode)->max_aw_cnt); \
4037	if (cur > max) \
4038	atomic_set(&F2FS_I_SB(inode)->max_aw_cnt, cur); \
4039	} while (0)
4040	#define stat_inc_gc_call_count(sbi, foreground) \
4041	(F2FS_STAT(sbi)->gc_call_count[(foreground)]++)
4042	#define stat_inc_gc_sec_count(sbi, type, gc_type) \
4043	(F2FS_STAT(sbi)->gc_secs[(type)][(gc_type)]++)
4044	#define stat_inc_gc_seg_count(sbi, type, gc_type) \
4045	(F2FS_STAT(sbi)->gc_segs[(type)][(gc_type)]++)
4046
4047	#define stat_inc_tot_blk_count(si, blks) \
4048	((si)->tot_blks += (blks))
4049
4050	#define stat_inc_data_blk_count(sbi, blks, gc_type) \
4051	do { \
4052	struct f2fs_stat_info *si = F2FS_STAT(sbi); \
4053	stat_inc_tot_blk_count(si, blks); \
4054	si->data_blks += (blks); \
4055	si->bg_data_blks += ((gc_type) == BG_GC) ? (blks) : 0; \
4056	} while (0)
4057
4058	#define stat_inc_node_blk_count(sbi, blks, gc_type) \
4059	do { \
4060	struct f2fs_stat_info *si = F2FS_STAT(sbi); \
4061	stat_inc_tot_blk_count(si, blks); \
4062	si->node_blks += (blks); \
4063	si->bg_node_blks += ((gc_type) == BG_GC) ? (blks) : 0; \
4064	} while (0)
4065
4066	int f2fs_build_stats(struct f2fs_sb_info *sbi);
4067	void f2fs_destroy_stats(struct f2fs_sb_info *sbi);
4068	void __init f2fs_create_root_stats(void);
4069	void f2fs_destroy_root_stats(void);
4070	void f2fs_update_sit_info(struct f2fs_sb_info *sbi);
4071	#else
4072	#define stat_inc_cp_call_count(sbi, foreground) do { } while (0)
4073	#define stat_inc_cp_count(sbi) do { } while (0)
4074	#define stat_io_skip_bggc_count(sbi) do { } while (0)
4075	#define stat_other_skip_bggc_count(sbi) do { } while (0)
4076	#define stat_inc_dirty_inode(sbi, type) do { } while (0)
4077	#define stat_dec_dirty_inode(sbi, type) do { } while (0)
4078	#define stat_inc_total_hit(sbi, type) do { } while (0)
4079	#define stat_inc_rbtree_node_hit(sbi, type) do { } while (0)
4080	#define stat_inc_largest_node_hit(sbi) do { } while (0)
4081	#define stat_inc_cached_node_hit(sbi, type) do { } while (0)
4082	#define stat_inc_inline_xattr(inode) do { } while (0)
4083	#define stat_dec_inline_xattr(inode) do { } while (0)
4084	#define stat_inc_inline_inode(inode) do { } while (0)
4085	#define stat_dec_inline_inode(inode) do { } while (0)
4086	#define stat_inc_inline_dir(inode) do { } while (0)
4087	#define stat_dec_inline_dir(inode) do { } while (0)
4088	#define stat_inc_compr_inode(inode) do { } while (0)
4089	#define stat_dec_compr_inode(inode) do { } while (0)
4090	#define stat_add_compr_blocks(inode, blocks) do { } while (0)
4091	#define stat_sub_compr_blocks(inode, blocks) do { } while (0)
4092	#define stat_inc_swapfile_inode(inode) do { } while (0)
4093	#define stat_dec_swapfile_inode(inode) do { } while (0)
4094	#define stat_inc_atomic_inode(inode) do { } while (0)
4095	#define stat_dec_atomic_inode(inode) do { } while (0)
4096	#define stat_update_max_atomic_write(inode) do { } while (0)
4097	#define stat_inc_meta_count(sbi, blkaddr) do { } while (0)
4098	#define stat_inc_seg_type(sbi, curseg) do { } while (0)
4099	#define stat_inc_block_count(sbi, curseg) do { } while (0)
4100	#define stat_inc_inplace_blocks(sbi) do { } while (0)
4101	#define stat_inc_gc_call_count(sbi, foreground) do { } while (0)
4102	#define stat_inc_gc_sec_count(sbi, type, gc_type) do { } while (0)
4103	#define stat_inc_gc_seg_count(sbi, type, gc_type) do { } while (0)
4104	#define stat_inc_tot_blk_count(si, blks) do { } while (0)
4105	#define stat_inc_data_blk_count(sbi, blks, gc_type) do { } while (0)
4106	#define stat_inc_node_blk_count(sbi, blks, gc_type) do { } while (0)
4107
4108	static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
4109	static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
4110	static inline void __init f2fs_create_root_stats(void) { }
4111	static inline void f2fs_destroy_root_stats(void) { }
4112	static inline void f2fs_update_sit_info(struct f2fs_sb_info *sbi) {}
4113	#endif
4114
4115	extern const struct file_operations f2fs_dir_operations;
4116	extern const struct file_operations f2fs_file_operations;
4117	extern const struct inode_operations f2fs_file_inode_operations;
4118	extern const struct address_space_operations f2fs_dblock_aops;
4119	extern const struct address_space_operations f2fs_node_aops;
4120	extern const struct address_space_operations f2fs_meta_aops;
4121	extern const struct inode_operations f2fs_dir_inode_operations;
4122	extern const struct inode_operations f2fs_symlink_inode_operations;
4123	extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
4124	extern const struct inode_operations f2fs_special_inode_operations;
4125	extern struct kmem_cache *f2fs_inode_entry_slab;
4126
4127	/*
4128	* inline.c
4129	*/
4130	bool f2fs_may_inline_data(struct inode *inode);
4131	bool f2fs_sanity_check_inline_data(struct inode *inode);
4132	bool f2fs_may_inline_dentry(struct inode *inode);
4133	void f2fs_do_read_inline_data(struct page *page, struct page *ipage);
4134	void f2fs_truncate_inline_inode(struct inode *inode,
4135	struct page *ipage, u64 from);
4136	int f2fs_read_inline_data(struct inode *inode, struct page *page);
4137	int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page);
4138	int f2fs_convert_inline_inode(struct inode *inode);
4139	int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry);
4140	int f2fs_write_inline_data(struct inode *inode, struct page *page);
4141	int f2fs_recover_inline_data(struct inode *inode, struct page *npage);
4142	struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
4143	const struct f2fs_filename *fname,
4144	struct page **res_page);
4145	int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
4146	struct page *ipage);
4147	int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
4148	struct inode *inode, nid_t ino, umode_t mode);
4149	void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry,
4150	struct page *page, struct inode *dir,
4151	struct inode *inode);
4152	bool f2fs_empty_inline_dir(struct inode *dir);
4153	int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
4154	struct fscrypt_str *fstr);
4155	int f2fs_inline_data_fiemap(struct inode *inode,
4156	struct fiemap_extent_info *fieinfo,
4157	__u64 start, __u64 len);
4158
4159	/*
4160	* shrinker.c
4161	*/
4162	unsigned long f2fs_shrink_count(struct shrinker *shrink,
4163	struct shrink_control *sc);
4164	unsigned long f2fs_shrink_scan(struct shrinker *shrink,
4165	struct shrink_control *sc);
4166	void f2fs_join_shrinker(struct f2fs_sb_info *sbi);
4167	void f2fs_leave_shrinker(struct f2fs_sb_info *sbi);
4168
4169	/*
4170	* extent_cache.c
4171	*/
4172	bool sanity_check_extent_cache(struct inode *inode);
4173	void f2fs_init_extent_tree(struct inode *inode);
4174	void f2fs_drop_extent_tree(struct inode *inode);
4175	void f2fs_destroy_extent_node(struct inode *inode);
4176	void f2fs_destroy_extent_tree(struct inode *inode);
4177	void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi);
4178	int __init f2fs_create_extent_cache(void);
4179	void f2fs_destroy_extent_cache(void);
4180
4181	/* read extent cache ops */
4182	void f2fs_init_read_extent_tree(struct inode *inode, struct page *ipage);
4183	bool f2fs_lookup_read_extent_cache(struct inode *inode, pgoff_t pgofs,
4184	struct extent_info *ei);
4185	bool f2fs_lookup_read_extent_cache_block(struct inode *inode, pgoff_t index,
4186	block_t *blkaddr);
4187	void f2fs_update_read_extent_cache(struct dnode_of_data *dn);
4188	void f2fs_update_read_extent_cache_range(struct dnode_of_data *dn,
4189	pgoff_t fofs, block_t blkaddr, unsigned int len);
4190	unsigned int f2fs_shrink_read_extent_tree(struct f2fs_sb_info *sbi,
4191	int nr_shrink);
4192
4193	/* block age extent cache ops */
4194	void f2fs_init_age_extent_tree(struct inode *inode);
4195	bool f2fs_lookup_age_extent_cache(struct inode *inode, pgoff_t pgofs,
4196	struct extent_info *ei);
4197	void f2fs_update_age_extent_cache(struct dnode_of_data *dn);
4198	void f2fs_update_age_extent_cache_range(struct dnode_of_data *dn,
4199	pgoff_t fofs, unsigned int len);
4200	unsigned int f2fs_shrink_age_extent_tree(struct f2fs_sb_info *sbi,
4201	int nr_shrink);
4202
4203	/*
4204	* sysfs.c
4205	*/
4206	#define MIN_RA_MUL 2
4207	#define MAX_RA_MUL 256
4208
4209	int __init f2fs_init_sysfs(void);
4210	void f2fs_exit_sysfs(void);
4211	int f2fs_register_sysfs(struct f2fs_sb_info *sbi);
4212	void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi);
4213
4214	/* verity.c */
4215	extern const struct fsverity_operations f2fs_verityops;
4216
4217	/*
4218	* crypto support
4219	*/
4220	static inline bool f2fs_encrypted_file(struct inode *inode)
4221	{
4222	return IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode);
4223	}
4224
4225	static inline void f2fs_set_encrypted_inode(struct inode *inode)
4226	{
4227	#ifdef CONFIG_FS_ENCRYPTION
4228	file_set_encrypt(inode);
4229	f2fs_set_inode_flags(inode);
4230	#endif
4231	}
4232
4233	/*
4234	* Returns true if the reads of the inode's data need to undergo some
4235	* postprocessing step, like decryption or authenticity verification.
4236	*/
4237	static inline bool f2fs_post_read_required(struct inode *inode)
4238	{
4239	return f2fs_encrypted_file(inode) || fsverity_active(inode) ||
4240	f2fs_compressed_file(inode);
4241	}
4242
4243	/*
4244	* compress.c
4245	*/
4246	#ifdef CONFIG_F2FS_FS_COMPRESSION
4247	bool f2fs_is_compressed_page(struct page *page);
4248	struct page *f2fs_compress_control_page(struct page *page);
4249	int f2fs_prepare_compress_overwrite(struct inode *inode,
4250	struct page **pagep, pgoff_t index, void **fsdata);
4251	bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
4252	pgoff_t index, unsigned copied);
4253	int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
4254	void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
4255	bool f2fs_is_compress_backend_ready(struct inode *inode);
4256	bool f2fs_is_compress_level_valid(int alg, int lvl);
4257	int __init f2fs_init_compress_mempool(void);
4258	void f2fs_destroy_compress_mempool(void);
4259	void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task);
4260	void f2fs_end_read_compressed_page(struct page *page, bool failed,
4261	block_t blkaddr, bool in_task);
4262	bool f2fs_cluster_is_empty(struct compress_ctx *cc);
4263	bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index);
4264	bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages,
4265	int index, int nr_pages, bool uptodate);
4266	bool f2fs_sanity_check_cluster(struct dnode_of_data *dn);
4267	void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page);
4268	int f2fs_write_multi_pages(struct compress_ctx *cc,
4269	int *submitted,
4270	struct writeback_control *wbc,
4271	enum iostat_type io_type);
4272	int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index);
4273	void f2fs_update_read_extent_tree_range_compressed(struct inode *inode,
4274	pgoff_t fofs, block_t blkaddr,
4275	unsigned int llen, unsigned int c_len);
4276	int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
4277	unsigned nr_pages, sector_t *last_block_in_bio,
4278	bool is_readahead, bool for_write);
4279	struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc);
4280	void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed,
4281	bool in_task);
4282	void f2fs_put_page_dic(struct page *page, bool in_task);
4283	unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn);
4284	int f2fs_init_compress_ctx(struct compress_ctx *cc);
4285	void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse);
4286	void f2fs_init_compress_info(struct f2fs_sb_info *sbi);
4287	int f2fs_init_compress_inode(struct f2fs_sb_info *sbi);
4288	void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi);
4289	int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi);
4290	void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
4291	int __init f2fs_init_compress_cache(void);
4292	void f2fs_destroy_compress_cache(void);
4293	struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi);
4294	void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr);
4295	void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
4296	nid_t ino, block_t blkaddr);
4297	bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
4298	block_t blkaddr);
4299	void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino);
4300	#define inc_compr_inode_stat(inode) \
4301	do { \
4302	struct f2fs_sb_info *sbi = F2FS_I_SB(inode); \
4303	sbi->compr_new_inode++; \
4304	} while (0)
4305	#define add_compr_block_stat(inode, blocks) \
4306	do { \
4307	struct f2fs_sb_info *sbi = F2FS_I_SB(inode); \
4308	int diff = F2FS_I(inode)->i_cluster_size - blocks; \
4309	sbi->compr_written_block += blocks; \
4310	sbi->compr_saved_block += diff; \
4311	} while (0)
4312	#else
4313	static inline bool f2fs_is_compressed_page(struct page *page) { return false; }
4314	static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
4315	{
4316	if (!f2fs_compressed_file(inode))
4317	return true;
4318	/* not support compression */
4319	return false;
4320	}
4321	static inline bool f2fs_is_compress_level_valid(int alg, int lvl) { return false; }
4322	static inline struct page *f2fs_compress_control_page(struct page *page)
4323	{
4324	WARN_ON_ONCE(1);
4325	return ERR_PTR(-EINVAL);
4326	}
4327	static inline int __init f2fs_init_compress_mempool(void) { return 0; }
4328	static inline void f2fs_destroy_compress_mempool(void) { }
4329	static inline void f2fs_decompress_cluster(struct decompress_io_ctx *dic,
4330	bool in_task) { }
4331	static inline void f2fs_end_read_compressed_page(struct page *page,
4332	bool failed, block_t blkaddr, bool in_task)
4333	{
4334	WARN_ON_ONCE(1);
4335	}
4336	static inline void f2fs_put_page_dic(struct page *page, bool in_task)
4337	{
4338	WARN_ON_ONCE(1);
4339	}
4340	static inline unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) { return 0; }
4341	static inline bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) { return false; }
4342	static inline int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) { return 0; }
4343	static inline void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) { }
4344	static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; }
4345	static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
4346	static inline int __init f2fs_init_compress_cache(void) { return 0; }
4347	static inline void f2fs_destroy_compress_cache(void) { }
4348	static inline void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi,
4349	block_t blkaddr) { }
4350	static inline void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi,
4351	struct page *page, nid_t ino, block_t blkaddr) { }
4352	static inline bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi,
4353	struct page *page, block_t blkaddr) { return false; }
4354	static inline void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi,
4355	nid_t ino) { }
4356	#define inc_compr_inode_stat(inode) do { } while (0)
4357	static inline void f2fs_update_read_extent_tree_range_compressed(
4358	struct inode *inode,
4359	pgoff_t fofs, block_t blkaddr,
4360	unsigned int llen, unsigned int c_len) { }
4361	#endif
4362
4363	static inline int set_compress_context(struct inode *inode)
4364	{
4365	#ifdef CONFIG_F2FS_FS_COMPRESSION
4366	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4367
4368	F2FS_I(inode)->i_compress_algorithm =
4369	F2FS_OPTION(sbi).compress_algorithm;
4370	F2FS_I(inode)->i_log_cluster_size =
4371	F2FS_OPTION(sbi).compress_log_size;
4372	F2FS_I(inode)->i_compress_flag =
4373	F2FS_OPTION(sbi).compress_chksum ?
4374	BIT(COMPRESS_CHKSUM) : 0;
4375	F2FS_I(inode)->i_cluster_size =
4376	BIT(F2FS_I(inode)->i_log_cluster_size);
4377	if ((F2FS_I(inode)->i_compress_algorithm == COMPRESS_LZ4 ||
4378	F2FS_I(inode)->i_compress_algorithm == COMPRESS_ZSTD) &&
4379	F2FS_OPTION(sbi).compress_level)
4380	F2FS_I(inode)->i_compress_level =
4381	F2FS_OPTION(sbi).compress_level;
4382	F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
4383	set_inode_flag(inode, flag: FI_COMPRESSED_FILE);
4384	stat_inc_compr_inode(inode);
4385	inc_compr_inode_stat(inode);
4386	f2fs_mark_inode_dirty_sync(inode, sync: true);
4387	return 0;
4388	#else
4389	return -EOPNOTSUPP;
4390	#endif
4391	}
4392
4393	static inline bool f2fs_disable_compressed_file(struct inode *inode)
4394	{
4395	struct f2fs_inode_info *fi = F2FS_I(inode);
4396
4397	if (!f2fs_compressed_file(inode))
4398	return true;
4399	if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))
4400	return false;
4401
4402	fi->i_flags &= ~F2FS_COMPR_FL;
4403	stat_dec_compr_inode(inode);
4404	clear_inode_flag(inode, flag: FI_COMPRESSED_FILE);
4405	f2fs_mark_inode_dirty_sync(inode, sync: true);
4406	return true;
4407	}
4408
4409	#define F2FS_FEATURE_FUNCS(name, flagname) \
4410	static inline bool f2fs_sb_has_##name(struct f2fs_sb_info *sbi) \
4411	{ \
4412	return F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_##flagname); \
4413	}
4414
4415	F2FS_FEATURE_FUNCS(encrypt, ENCRYPT);
4416	F2FS_FEATURE_FUNCS(blkzoned, BLKZONED);
4417	F2FS_FEATURE_FUNCS(extra_attr, EXTRA_ATTR);
4418	F2FS_FEATURE_FUNCS(project_quota, PRJQUOTA);
4419	F2FS_FEATURE_FUNCS(inode_chksum, INODE_CHKSUM);
4420	F2FS_FEATURE_FUNCS(flexible_inline_xattr, FLEXIBLE_INLINE_XATTR);
4421	F2FS_FEATURE_FUNCS(quota_ino, QUOTA_INO);
4422	F2FS_FEATURE_FUNCS(inode_crtime, INODE_CRTIME);
4423	F2FS_FEATURE_FUNCS(lost_found, LOST_FOUND);
4424	F2FS_FEATURE_FUNCS(verity, VERITY);
4425	F2FS_FEATURE_FUNCS(sb_chksum, SB_CHKSUM);
4426	F2FS_FEATURE_FUNCS(casefold, CASEFOLD);
4427	F2FS_FEATURE_FUNCS(compression, COMPRESSION);
4428	F2FS_FEATURE_FUNCS(readonly, RO);
4429
4430	#ifdef CONFIG_BLK_DEV_ZONED
4431	static inline bool f2fs_blkz_is_seq(struct f2fs_sb_info *sbi, int devi,
4432	block_t blkaddr)
4433	{
4434	unsigned int zno = blkaddr / sbi->blocks_per_blkz;
4435
4436	return test_bit(zno, FDEV(devi).blkz_seq);
4437	}
4438	#endif
4439
4440	static inline int f2fs_bdev_index(struct f2fs_sb_info *sbi,
4441	struct block_device *bdev)
4442	{
4443	int i;
4444
4445	if (!f2fs_is_multi_device(sbi))
4446	return 0;
4447
4448	for (i = 0; i < sbi->s_ndevs; i++)
4449	if (FDEV(i).bdev == bdev)
4450	return i;
4451
4452	WARN_ON(1);
4453	return -1;
4454	}
4455
4456	static inline bool f2fs_hw_should_discard(struct f2fs_sb_info *sbi)
4457	{
4458	return f2fs_sb_has_blkzoned(sbi);
4459	}
4460
4461	static inline bool f2fs_bdev_support_discard(struct block_device *bdev)
4462	{
4463	return bdev_max_discard_sectors(bdev) || bdev_is_zoned(bdev);
4464	}
4465
4466	static inline bool f2fs_hw_support_discard(struct f2fs_sb_info *sbi)
4467	{
4468	int i;
4469
4470	if (!f2fs_is_multi_device(sbi))
4471	return f2fs_bdev_support_discard(bdev: sbi->sb->s_bdev);
4472
4473	for (i = 0; i < sbi->s_ndevs; i++)
4474	if (f2fs_bdev_support_discard(FDEV(i).bdev))
4475	return true;
4476	return false;
4477	}
4478
4479	static inline bool f2fs_realtime_discard_enable(struct f2fs_sb_info *sbi)
4480	{
4481	return (test_opt(sbi, DISCARD) && f2fs_hw_support_discard(sbi)) ||
4482	f2fs_hw_should_discard(sbi);
4483	}
4484
4485	static inline bool f2fs_hw_is_readonly(struct f2fs_sb_info *sbi)
4486	{
4487	int i;
4488
4489	if (!f2fs_is_multi_device(sbi))
4490	return bdev_read_only(bdev: sbi->sb->s_bdev);
4491
4492	for (i = 0; i < sbi->s_ndevs; i++)
4493	if (bdev_read_only(FDEV(i).bdev))
4494	return true;
4495	return false;
4496	}
4497
4498	static inline bool f2fs_dev_is_readonly(struct f2fs_sb_info *sbi)
4499	{
4500	return f2fs_sb_has_readonly(sbi) || f2fs_hw_is_readonly(sbi);
4501	}
4502
4503	static inline bool f2fs_lfs_mode(struct f2fs_sb_info *sbi)
4504	{
4505	return F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS;
4506	}
4507
4508	static inline bool f2fs_low_mem_mode(struct f2fs_sb_info *sbi)
4509	{
4510	return F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW;
4511	}
4512
4513	static inline bool f2fs_may_compress(struct inode *inode)
4514	{
4515	if (IS_SWAPFILE(inode) || f2fs_is_pinned_file(inode) ||
4516	f2fs_is_atomic_file(inode) || f2fs_has_inline_data(inode) ||
4517	f2fs_is_mmap_file(inode))
4518	return false;
4519	return S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode);
4520	}
4521
4522	static inline void f2fs_i_compr_blocks_update(struct inode *inode,
4523	u64 blocks, bool add)
4524	{
4525	struct f2fs_inode_info *fi = F2FS_I(inode);
4526	int diff = fi->i_cluster_size - blocks;
4527
4528	/* don't update i_compr_blocks if saved blocks were released */
4529	if (!add && !atomic_read(v: &fi->i_compr_blocks))
4530	return;
4531
4532	if (add) {
4533	atomic_add(i: diff, v: &fi->i_compr_blocks);
4534	stat_add_compr_blocks(inode, diff);
4535	} else {
4536	atomic_sub(i: diff, v: &fi->i_compr_blocks);
4537	stat_sub_compr_blocks(inode, diff);
4538	}
4539	f2fs_mark_inode_dirty_sync(inode, sync: true);
4540	}
4541
4542	static inline bool f2fs_allow_multi_device_dio(struct f2fs_sb_info *sbi,
4543	int flag)
4544	{
4545	if (!f2fs_is_multi_device(sbi))
4546	return false;
4547	if (flag != F2FS_GET_BLOCK_DIO)
4548	return false;
4549	return sbi->aligned_blksize;
4550	}
4551
4552	static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
4553	{
4554	return fsverity_active(inode) &&
4555	idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
4556	}
4557
4558	#ifdef CONFIG_F2FS_FAULT_INJECTION
4559	extern void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
4560	unsigned int type);
4561	#else
4562	#define f2fs_build_fault_attr(sbi, rate, type) do { } while (0)
4563	#endif
4564
4565	static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
4566	{
4567	#ifdef CONFIG_QUOTA
4568	if (f2fs_sb_has_quota_ino(sbi))
4569	return true;
4570	if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
4571	F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
4572	F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
4573	return true;
4574	#endif
4575	return false;
4576	}
4577
4578	static inline bool f2fs_block_unit_discard(struct f2fs_sb_info *sbi)
4579	{
4580	return F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK;
4581	}
4582
4583	static inline void f2fs_io_schedule_timeout(long timeout)
4584	{
4585	set_current_state(TASK_UNINTERRUPTIBLE);
4586	io_schedule_timeout(timeout);
4587	}
4588
4589	static inline void f2fs_handle_page_eio(struct f2fs_sb_info *sbi, pgoff_t ofs,
4590	enum page_type type)
4591	{
4592	if (unlikely(f2fs_cp_error(sbi)))
4593	return;
4594
4595	if (ofs == sbi->page_eio_ofs[type]) {
4596	if (sbi->page_eio_cnt[type]++ == MAX_RETRY_PAGE_EIO)
4597	set_ckpt_flags(sbi, CP_ERROR_FLAG);
4598	} else {
4599	sbi->page_eio_ofs[type] = ofs;
4600	sbi->page_eio_cnt[type] = 0;
4601	}
4602	}
4603
4604	static inline bool f2fs_is_readonly(struct f2fs_sb_info *sbi)
4605	{
4606	return f2fs_sb_has_readonly(sbi) || f2fs_readonly(sb: sbi->sb);
4607	}
4608
4609	#define EFSBADCRC EBADMSG /* Bad CRC detected */
4610	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
4611
4612	#endif /* _LINUX_F2FS_H */
4613