f2fs.h 82.8 KB
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/*
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 * fs/f2fs/f2fs.h
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _LINUX_F2FS_H
#define _LINUX_F2FS_H

#include <linux/types.h>
#include <linux/page-flags.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/crc32.h>
#include <linux/magic.h>
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#include <linux/kobject.h>
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#include <linux/sched.h>
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#include <linux/vmalloc.h>
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#include <linux/bio.h>
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#include <linux/blkdev.h>
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#ifdef CONFIG_F2FS_FS_ENCRYPTION
#include <linux/fscrypt_supp.h>
#else
#include <linux/fscrypt_notsupp.h>
#endif
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#include <crypto/hash.h>
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#ifdef CONFIG_F2FS_CHECK_FS
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#define f2fs_bug_on(sbi, condition)	BUG_ON(condition)
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#else
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#define f2fs_bug_on(sbi, condition)					\
	do {								\
		if (unlikely(condition)) {				\
			WARN_ON(1);					\
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			set_sbi_flag(sbi, SBI_NEED_FSCK);		\
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		}							\
	} while (0)
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#endif

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#ifdef CONFIG_F2FS_FAULT_INJECTION
enum {
	FAULT_KMALLOC,
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	FAULT_PAGE_ALLOC,
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	FAULT_ALLOC_NID,
	FAULT_ORPHAN,
	FAULT_BLOCK,
	FAULT_DIR_DEPTH,
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	FAULT_EVICT_INODE,
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	FAULT_TRUNCATE,
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	FAULT_IO,
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	FAULT_CHECKPOINT,
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	FAULT_MAX,
};

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struct f2fs_fault_info {
	atomic_t inject_ops;
	unsigned int inject_rate;
	unsigned int inject_type;
};

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extern char *fault_name[FAULT_MAX];
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#define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1 << (type)))
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#endif

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/*
 * For mount options
 */
#define F2FS_MOUNT_BG_GC		0x00000001
#define F2FS_MOUNT_DISABLE_ROLL_FORWARD	0x00000002
#define F2FS_MOUNT_DISCARD		0x00000004
#define F2FS_MOUNT_NOHEAP		0x00000008
#define F2FS_MOUNT_XATTR_USER		0x00000010
#define F2FS_MOUNT_POSIX_ACL		0x00000020
#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY	0x00000040
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#define F2FS_MOUNT_INLINE_XATTR		0x00000080
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#define F2FS_MOUNT_INLINE_DATA		0x00000100
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#define F2FS_MOUNT_INLINE_DENTRY	0x00000200
#define F2FS_MOUNT_FLUSH_MERGE		0x00000400
#define F2FS_MOUNT_NOBARRIER		0x00000800
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#define F2FS_MOUNT_FASTBOOT		0x00001000
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#define F2FS_MOUNT_EXTENT_CACHE		0x00002000
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#define F2FS_MOUNT_FORCE_FG_GC		0x00004000
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#define F2FS_MOUNT_DATA_FLUSH		0x00008000
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#define F2FS_MOUNT_FAULT_INJECTION	0x00010000
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#define F2FS_MOUNT_ADAPTIVE		0x00020000
#define F2FS_MOUNT_LFS			0x00040000
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#define clear_opt(sbi, option)	((sbi)->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option)	((sbi)->mount_opt.opt |= F2FS_MOUNT_##option)
#define test_opt(sbi, option)	((sbi)->mount_opt.opt & F2FS_MOUNT_##option)
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#define ver_after(a, b)	(typecheck(unsigned long long, a) &&		\
		typecheck(unsigned long long, b) &&			\
		((long long)((a) - (b)) > 0))

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typedef u32 block_t;	/*
			 * should not change u32, since it is the on-disk block
			 * address format, __le32.
			 */
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typedef u32 nid_t;

struct f2fs_mount_info {
	unsigned int	opt;
};

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#define F2FS_FEATURE_ENCRYPT	0x0001
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#define F2FS_FEATURE_BLKZONED	0x0002
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#define F2FS_HAS_FEATURE(sb, mask)					\
	((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0)
#define F2FS_SET_FEATURE(sb, mask)					\
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	(F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask))
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#define F2FS_CLEAR_FEATURE(sb, mask)					\
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	(F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask))
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/*
 * For checkpoint manager
 */
enum {
	NAT_BITMAP,
	SIT_BITMAP
};

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enum {
	CP_UMOUNT,
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	CP_FASTBOOT,
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	CP_SYNC,
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	CP_RECOVERY,
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	CP_DISCARD,
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};

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#define DEF_BATCHED_TRIM_SECTIONS	2048
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#define BATCHED_TRIM_SEGMENTS(sbi)	\
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		(GET_SEG_FROM_SEC(sbi, SM_I(sbi)->trim_sections))
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#define BATCHED_TRIM_BLOCKS(sbi)	\
		(BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg)
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#define MAX_DISCARD_BLOCKS(sbi)		BLKS_PER_SEC(sbi)
#define DISCARD_ISSUE_RATE		8
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#define DEF_CP_INTERVAL			60	/* 60 secs */
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#define DEF_IDLE_INTERVAL		5	/* 5 secs */
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struct cp_control {
	int reason;
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	__u64 trim_start;
	__u64 trim_end;
	__u64 trim_minlen;
	__u64 trimmed;
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};

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/*
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 * For CP/NAT/SIT/SSA readahead
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 */
enum {
	META_CP,
	META_NAT,
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	META_SIT,
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	META_SSA,
	META_POR,
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};

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/* for the list of ino */
enum {
	ORPHAN_INO,		/* for orphan ino list */
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	APPEND_INO,		/* for append ino list */
	UPDATE_INO,		/* for update ino list */
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	MAX_INO_ENTRY,		/* max. list */
};

struct ino_entry {
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	struct list_head list;	/* list head */
	nid_t ino;		/* inode number */
};

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/* for the list of inodes to be GCed */
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struct inode_entry {
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	struct list_head list;	/* list head */
	struct inode *inode;	/* vfs inode pointer */
};

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/* for the bitmap indicate blocks to be discarded */
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struct discard_entry {
	struct list_head list;	/* list head */
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	block_t start_blkaddr;	/* start blockaddr of current segment */
	unsigned char discard_map[SIT_VBLOCK_MAP_SIZE];	/* segment discard bitmap */
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};

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/* max discard pend list number */
#define MAX_PLIST_NUM		512
#define plist_idx(blk_num)	((blk_num) >= MAX_PLIST_NUM ?		\
					(MAX_PLIST_NUM - 1) : (blk_num - 1))

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enum {
	D_PREP,
	D_SUBMIT,
	D_DONE,
};

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struct discard_info {
	block_t lstart;			/* logical start address */
	block_t len;			/* length */
	block_t start;			/* actual start address in dev */
};

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struct discard_cmd {
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	struct rb_node rb_node;		/* rb node located in rb-tree */
	union {
		struct {
			block_t lstart;	/* logical start address */
			block_t len;	/* length */
			block_t start;	/* actual start address in dev */
		};
		struct discard_info di;	/* discard info */

	};
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	struct list_head list;		/* command list */
	struct completion wait;		/* compleation */
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	struct block_device *bdev;	/* bdev */
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	int state;			/* state */
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	int error;			/* bio error */
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};

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struct discard_cmd_control {
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	struct task_struct *f2fs_issue_discard;	/* discard thread */
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	struct list_head entry_list;		/* 4KB discard entry list */
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	struct list_head pend_list[MAX_PLIST_NUM];/* store pending entries */
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	struct list_head wait_list;		/* store on-flushing entries */
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	wait_queue_head_t discard_wait_queue;	/* waiting queue for wake-up */
	struct mutex cmd_lock;
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	int nr_discards;			/* # of discards in the list */
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	int max_discards;			/* max. discards to be issued */
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	atomic_t issued_discard;		/* # of issued discard */
	atomic_t issing_discard;		/* # of issing discard */
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	atomic_t discard_cmd_cnt;		/* # of cached cmd count */
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	struct rb_root root;			/* root of discard rb-tree */
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};

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/* for the list of fsync inodes, used only during recovery */
struct fsync_inode_entry {
	struct list_head list;	/* list head */
	struct inode *inode;	/* vfs inode pointer */
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	block_t blkaddr;	/* block address locating the last fsync */
	block_t last_dentry;	/* block address locating the last dentry */
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};

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#define nats_in_cursum(jnl)		(le16_to_cpu((jnl)->n_nats))
#define sits_in_cursum(jnl)		(le16_to_cpu((jnl)->n_sits))
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#define nat_in_journal(jnl, i)		((jnl)->nat_j.entries[i].ne)
#define nid_in_journal(jnl, i)		((jnl)->nat_j.entries[i].nid)
#define sit_in_journal(jnl, i)		((jnl)->sit_j.entries[i].se)
#define segno_in_journal(jnl, i)	((jnl)->sit_j.entries[i].segno)
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#define MAX_NAT_JENTRIES(jnl)	(NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
#define MAX_SIT_JENTRIES(jnl)	(SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
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static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
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{
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	int before = nats_in_cursum(journal);
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	journal->n_nats = cpu_to_le16(before + i);
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	return before;
}

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static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
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{
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	int before = sits_in_cursum(journal);
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	journal->n_sits = cpu_to_le16(before + i);
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	return before;
}

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static inline bool __has_cursum_space(struct f2fs_journal *journal,
							int size, int type)
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{
	if (type == NAT_JOURNAL)
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		return size <= MAX_NAT_JENTRIES(journal);
	return size <= MAX_SIT_JENTRIES(journal);
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}

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/*
 * ioctl commands
 */
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#define F2FS_IOC_GETFLAGS		FS_IOC_GETFLAGS
#define F2FS_IOC_SETFLAGS		FS_IOC_SETFLAGS
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#define F2FS_IOC_GETVERSION		FS_IOC_GETVERSION
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#define F2FS_IOCTL_MAGIC		0xf5
#define F2FS_IOC_START_ATOMIC_WRITE	_IO(F2FS_IOCTL_MAGIC, 1)
#define F2FS_IOC_COMMIT_ATOMIC_WRITE	_IO(F2FS_IOCTL_MAGIC, 2)
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#define F2FS_IOC_START_VOLATILE_WRITE	_IO(F2FS_IOCTL_MAGIC, 3)
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#define F2FS_IOC_RELEASE_VOLATILE_WRITE	_IO(F2FS_IOCTL_MAGIC, 4)
#define F2FS_IOC_ABORT_VOLATILE_WRITE	_IO(F2FS_IOCTL_MAGIC, 5)
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#define F2FS_IOC_GARBAGE_COLLECT	_IO(F2FS_IOCTL_MAGIC, 6)
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#define F2FS_IOC_WRITE_CHECKPOINT	_IO(F2FS_IOCTL_MAGIC, 7)
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#define F2FS_IOC_DEFRAGMENT		_IO(F2FS_IOCTL_MAGIC, 8)
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#define F2FS_IOC_MOVE_RANGE		_IOWR(F2FS_IOCTL_MAGIC, 9,	\
						struct f2fs_move_range)
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#define F2FS_IOC_SET_ENCRYPTION_POLICY	FS_IOC_SET_ENCRYPTION_POLICY
#define F2FS_IOC_GET_ENCRYPTION_POLICY	FS_IOC_GET_ENCRYPTION_POLICY
#define F2FS_IOC_GET_ENCRYPTION_PWSALT	FS_IOC_GET_ENCRYPTION_PWSALT
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/*
 * should be same as XFS_IOC_GOINGDOWN.
 * Flags for going down operation used by FS_IOC_GOINGDOWN
 */
#define F2FS_IOC_SHUTDOWN	_IOR('X', 125, __u32)	/* Shutdown */
#define F2FS_GOING_DOWN_FULLSYNC	0x0	/* going down with full sync */
#define F2FS_GOING_DOWN_METASYNC	0x1	/* going down with metadata */
#define F2FS_GOING_DOWN_NOSYNC		0x2	/* going down */
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#define F2FS_GOING_DOWN_METAFLUSH	0x3	/* going down with meta flush */
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#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
/*
 * ioctl commands in 32 bit emulation
 */
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#define F2FS_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
#define F2FS_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
#define F2FS_IOC32_GETVERSION		FS_IOC32_GETVERSION
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#endif

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struct f2fs_defragment {
	u64 start;
	u64 len;
};

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struct f2fs_move_range {
	u32 dst_fd;		/* destination fd */
	u64 pos_in;		/* start position in src_fd */
	u64 pos_out;		/* start position in dst_fd */
	u64 len;		/* size to move */
};

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/*
 * For INODE and NODE manager
 */
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/* for directory operations */
struct f2fs_dentry_ptr {
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	struct inode *inode;
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	const void *bitmap;
	struct f2fs_dir_entry *dentry;
	__u8 (*filename)[F2FS_SLOT_LEN];
	int max;
};

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static inline void make_dentry_ptr_block(struct inode *inode,
		struct f2fs_dentry_ptr *d, struct f2fs_dentry_block *t)
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{
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	d->inode = inode;
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	d->max = NR_DENTRY_IN_BLOCK;
	d->bitmap = &t->dentry_bitmap;
	d->dentry = t->dentry;
	d->filename = t->filename;
}
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static inline void make_dentry_ptr_inline(struct inode *inode,
		struct f2fs_dentry_ptr *d, struct f2fs_inline_dentry *t)
{
	d->inode = inode;
	d->max = NR_INLINE_DENTRY;
	d->bitmap = &t->dentry_bitmap;
	d->dentry = t->dentry;
	d->filename = t->filename;
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}

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/*
 * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1
 * as its node offset to distinguish from index node blocks.
 * But some bits are used to mark the node block.
 */
#define XATTR_NODE_OFFSET	((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
				>> OFFSET_BIT_SHIFT)
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enum {
	ALLOC_NODE,			/* allocate a new node page if needed */
	LOOKUP_NODE,			/* look up a node without readahead */
	LOOKUP_NODE_RA,			/*
					 * look up a node with readahead called
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					 * by get_data_block.
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					 */
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};

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#define F2FS_LINK_MAX	0xffffffff	/* maximum link count per file */
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#define MAX_DIR_RA_PAGES	4	/* maximum ra pages of dir */

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/* vector size for gang look-up from extent cache that consists of radix tree */
#define EXT_TREE_VEC_SIZE	64

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/* for in-memory extent cache entry */
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#define F2FS_MIN_EXTENT_LEN	64	/* minimum extent length */

/* number of extent info in extent cache we try to shrink */
#define EXTENT_CACHE_SHRINK_NUMBER	128
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struct rb_entry {
	struct rb_node rb_node;		/* rb node located in rb-tree */
	unsigned int ofs;		/* start offset of the entry */
	unsigned int len;		/* length of the entry */
};

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struct extent_info {
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	unsigned int fofs;		/* start offset in a file */
	unsigned int len;		/* length of the extent */
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	u32 blk;			/* start block address of the extent */
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};

struct extent_node {
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	struct rb_node rb_node;
	union {
		struct {
			unsigned int fofs;
			unsigned int len;
			u32 blk;
		};
		struct extent_info ei;	/* extent info */

	};
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	struct list_head list;		/* node in global extent list of sbi */
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	struct extent_tree *et;		/* extent tree pointer */
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};

struct extent_tree {
	nid_t ino;			/* inode number */
	struct rb_root root;		/* root of extent info rb-tree */
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	struct extent_node *cached_en;	/* recently accessed extent node */
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	struct extent_info largest;	/* largested extent info */
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	struct list_head list;		/* to be used by sbi->zombie_list */
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	rwlock_t lock;			/* protect extent info rb-tree */
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	atomic_t node_cnt;		/* # of extent node in rb-tree*/
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};

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/*
 * This structure is taken from ext4_map_blocks.
 *
 * Note that, however, f2fs uses NEW and MAPPED flags for f2fs_map_blocks().
 */
#define F2FS_MAP_NEW		(1 << BH_New)
#define F2FS_MAP_MAPPED		(1 << BH_Mapped)
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#define F2FS_MAP_UNWRITTEN	(1 << BH_Unwritten)
#define F2FS_MAP_FLAGS		(F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
				F2FS_MAP_UNWRITTEN)
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struct f2fs_map_blocks {
	block_t m_pblk;
	block_t m_lblk;
	unsigned int m_len;
	unsigned int m_flags;
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	pgoff_t *m_next_pgofs;		/* point next possible non-hole pgofs */
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};

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/* for flag in get_data_block */
#define F2FS_GET_BLOCK_READ		0
#define F2FS_GET_BLOCK_DIO		1
#define F2FS_GET_BLOCK_FIEMAP		2
#define F2FS_GET_BLOCK_BMAP		3
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#define F2FS_GET_BLOCK_PRE_DIO		4
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#define F2FS_GET_BLOCK_PRE_AIO		5
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/*
 * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
 */
#define FADVISE_COLD_BIT	0x01
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#define FADVISE_LOST_PINO_BIT	0x02
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#define FADVISE_ENCRYPT_BIT	0x04
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#define FADVISE_ENC_NAME_BIT	0x08
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#define FADVISE_KEEP_SIZE_BIT	0x10
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#define file_is_cold(inode)	is_file(inode, FADVISE_COLD_BIT)
#define file_wrong_pino(inode)	is_file(inode, FADVISE_LOST_PINO_BIT)
#define file_set_cold(inode)	set_file(inode, FADVISE_COLD_BIT)
#define file_lost_pino(inode)	set_file(inode, FADVISE_LOST_PINO_BIT)
#define file_clear_cold(inode)	clear_file(inode, FADVISE_COLD_BIT)
#define file_got_pino(inode)	clear_file(inode, FADVISE_LOST_PINO_BIT)
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#define file_is_encrypt(inode)	is_file(inode, FADVISE_ENCRYPT_BIT)
#define file_set_encrypt(inode)	set_file(inode, FADVISE_ENCRYPT_BIT)
#define file_clear_encrypt(inode) clear_file(inode, FADVISE_ENCRYPT_BIT)
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#define file_enc_name(inode)	is_file(inode, FADVISE_ENC_NAME_BIT)
#define file_set_enc_name(inode) set_file(inode, FADVISE_ENC_NAME_BIT)
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#define file_keep_isize(inode)	is_file(inode, FADVISE_KEEP_SIZE_BIT)
#define file_set_keep_isize(inode) set_file(inode, FADVISE_KEEP_SIZE_BIT)
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#define DEF_DIR_LEVEL		0

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struct f2fs_inode_info {
	struct inode vfs_inode;		/* serve a vfs inode */
	unsigned long i_flags;		/* keep an inode flags for ioctl */
	unsigned char i_advise;		/* use to give file attribute hints */
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	unsigned char i_dir_level;	/* use for dentry level for large dir */
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	unsigned int i_current_depth;	/* use only in directory structure */
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	unsigned int i_pino;		/* parent inode number */
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	umode_t i_acl_mode;		/* keep file acl mode temporarily */

	/* Use below internally in f2fs*/
	unsigned long flags;		/* use to pass per-file flags */
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	struct rw_semaphore i_sem;	/* protect fi info */
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	atomic_t dirty_pages;		/* # of dirty pages */
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	f2fs_hash_t chash;		/* hash value of given file name */
	unsigned int clevel;		/* maximum level of given file name */
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	struct task_struct *task;	/* lookup and create consistency */
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	nid_t i_xattr_nid;		/* node id that contains xattrs */
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	loff_t	last_disk_size;		/* lastly written file size */
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	struct list_head dirty_list;	/* dirty list for dirs and files */
	struct list_head gdirty_list;	/* linked in global dirty list */
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	struct list_head inmem_pages;	/* inmemory pages managed by f2fs */
	struct mutex inmem_lock;	/* lock for inmemory pages */
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	struct extent_tree *extent_tree;	/* cached extent_tree entry */
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	struct rw_semaphore dio_rwsem[2];/* avoid racing between dio and gc */
513 514 515
};

static inline void get_extent_info(struct extent_info *ext,
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					struct f2fs_extent *i_ext)
517
{
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	ext->fofs = le32_to_cpu(i_ext->fofs);
	ext->blk = le32_to_cpu(i_ext->blk);
	ext->len = le32_to_cpu(i_ext->len);
521 522 523 524 525 526
}

static inline void set_raw_extent(struct extent_info *ext,
					struct f2fs_extent *i_ext)
{
	i_ext->fofs = cpu_to_le32(ext->fofs);
527
	i_ext->blk = cpu_to_le32(ext->blk);
528 529 530
	i_ext->len = cpu_to_le32(ext->len);
}

531 532 533 534 535 536 537 538
static inline void set_extent_info(struct extent_info *ei, unsigned int fofs,
						u32 blk, unsigned int len)
{
	ei->fofs = fofs;
	ei->blk = blk;
	ei->len = len;
}

539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556
static inline bool __is_discard_mergeable(struct discard_info *back,
						struct discard_info *front)
{
	return back->lstart + back->len == front->lstart;
}

static inline bool __is_discard_back_mergeable(struct discard_info *cur,
						struct discard_info *back)
{
	return __is_discard_mergeable(back, cur);
}

static inline bool __is_discard_front_mergeable(struct discard_info *cur,
						struct discard_info *front)
{
	return __is_discard_mergeable(cur, front);
}

557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575
static inline bool __is_extent_mergeable(struct extent_info *back,
						struct extent_info *front)
{
	return (back->fofs + back->len == front->fofs &&
			back->blk + back->len == front->blk);
}

static inline bool __is_back_mergeable(struct extent_info *cur,
						struct extent_info *back)
{
	return __is_extent_mergeable(back, cur);
}

static inline bool __is_front_mergeable(struct extent_info *cur,
						struct extent_info *front)
{
	return __is_extent_mergeable(cur, front);
}

576
extern void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync);
577 578
static inline void __try_update_largest_extent(struct inode *inode,
			struct extent_tree *et, struct extent_node *en)
579
{
580
	if (en->ei.len > et->largest.len) {
581
		et->largest = en->ei;
582
		f2fs_mark_inode_dirty_sync(inode, true);
583
	}
584 585
}

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enum nid_list {
	FREE_NID_LIST,
	ALLOC_NID_LIST,
	MAX_NID_LIST,
};

592 593 594
struct f2fs_nm_info {
	block_t nat_blkaddr;		/* base disk address of NAT */
	nid_t max_nid;			/* maximum possible node ids */
595
	nid_t available_nids;		/* # of available node ids */
596
	nid_t next_scan_nid;		/* the next nid to be scanned */
597
	unsigned int ram_thresh;	/* control the memory footprint */
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	unsigned int ra_nid_pages;	/* # of nid pages to be readaheaded */
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	unsigned int dirty_nats_ratio;	/* control dirty nats ratio threshold */
600 601 602

	/* NAT cache management */
	struct radix_tree_root nat_root;/* root of the nat entry cache */
603
	struct radix_tree_root nat_set_root;/* root of the nat set cache */
604
	struct rw_semaphore nat_tree_lock;	/* protect nat_tree_lock */
605
	struct list_head nat_entries;	/* cached nat entry list (clean) */
606
	unsigned int nat_cnt;		/* the # of cached nat entries */
607
	unsigned int dirty_nat_cnt;	/* total num of nat entries in set */
608
	unsigned int nat_blocks;	/* # of nat blocks */
609 610

	/* free node ids management */
611
	struct radix_tree_root free_nid_root;/* root of the free_nid cache */
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	struct list_head nid_list[MAX_NID_LIST];/* lists for free nids */
	unsigned int nid_cnt[MAX_NID_LIST];	/* the number of free node id */
	spinlock_t nid_list_lock;	/* protect nid lists ops */
615
	struct mutex build_lock;	/* lock for build free nids */
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	unsigned char (*free_nid_bitmap)[NAT_ENTRY_BITMAP_SIZE];
	unsigned char *nat_block_bitmap;
618
	unsigned short *free_nid_count;	/* free nid count of NAT block */
619 620 621

	/* for checkpoint */
	char *nat_bitmap;		/* NAT bitmap pointer */
622 623 624 625 626

	unsigned int nat_bits_blocks;	/* # of nat bits blocks */
	unsigned char *nat_bits;	/* NAT bits blocks */
	unsigned char *full_nat_bits;	/* full NAT pages */
	unsigned char *empty_nat_bits;	/* empty NAT pages */
627 628 629
#ifdef CONFIG_F2FS_CHECK_FS
	char *nat_bitmap_mir;		/* NAT bitmap mirror */
#endif
630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
	int bitmap_size;		/* bitmap size */
};

/*
 * this structure is used as one of function parameters.
 * all the information are dedicated to a given direct node block determined
 * by the data offset in a file.
 */
struct dnode_of_data {
	struct inode *inode;		/* vfs inode pointer */
	struct page *inode_page;	/* its inode page, NULL is possible */
	struct page *node_page;		/* cached direct node page */
	nid_t nid;			/* node id of the direct node block */
	unsigned int ofs_in_node;	/* data offset in the node page */
	bool inode_page_locked;		/* inode page is locked or not */
645
	bool node_changed;		/* is node block changed */
646 647
	char cur_level;			/* level of hole node page */
	char max_level;			/* level of current page located */
648 649 650 651 652 653
	block_t	data_blkaddr;		/* block address of the node block */
};

static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
		struct page *ipage, struct page *npage, nid_t nid)
{
654
	memset(dn, 0, sizeof(*dn));
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
	dn->inode = inode;
	dn->inode_page = ipage;
	dn->node_page = npage;
	dn->nid = nid;
}

/*
 * For SIT manager
 *
 * By default, there are 6 active log areas across the whole main area.
 * When considering hot and cold data separation to reduce cleaning overhead,
 * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
 * respectively.
 * In the current design, you should not change the numbers intentionally.
 * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
 * logs individually according to the underlying devices. (default: 6)
 * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
 * data and 8 for node logs.
 */
#define	NR_CURSEG_DATA_TYPE	(3)
#define NR_CURSEG_NODE_TYPE	(3)
#define NR_CURSEG_TYPE	(NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)

enum {
	CURSEG_HOT_DATA	= 0,	/* directory entry blocks */
	CURSEG_WARM_DATA,	/* data blocks */
	CURSEG_COLD_DATA,	/* multimedia or GCed data blocks */
	CURSEG_HOT_NODE,	/* direct node blocks of directory files */
	CURSEG_WARM_NODE,	/* direct node blocks of normal files */
	CURSEG_COLD_NODE,	/* indirect node blocks */
685
	NO_CHECK_TYPE,
686 687
};

688 689
struct flush_cmd {
	struct completion wait;
690
	struct llist_node llnode;
691 692 693
	int ret;
};

694 695 696
struct flush_cmd_control {
	struct task_struct *f2fs_issue_flush;	/* flush thread */
	wait_queue_head_t flush_wait_queue;	/* waiting queue for wake-up */
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	atomic_t issued_flush;			/* # of issued flushes */
	atomic_t issing_flush;			/* # of issing flushes */
699 700
	struct llist_head issue_list;		/* list for command issue */
	struct llist_node *dispatch_list;	/* list for command dispatch */
701 702
};

703 704 705 706 707 708 709 710 711 712 713 714 715 716
struct f2fs_sm_info {
	struct sit_info *sit_info;		/* whole segment information */
	struct free_segmap_info *free_info;	/* free segment information */
	struct dirty_seglist_info *dirty_info;	/* dirty segment information */
	struct curseg_info *curseg_array;	/* active segment information */

	block_t seg0_blkaddr;		/* block address of 0'th segment */
	block_t main_blkaddr;		/* start block address of main area */
	block_t ssa_blkaddr;		/* start block address of SSA area */

	unsigned int segment_count;	/* total # of segments */
	unsigned int main_segments;	/* # of segments in main area */
	unsigned int reserved_segments;	/* # of reserved segments */
	unsigned int ovp_segments;	/* # of overprovision segments */
717 718 719

	/* a threshold to reclaim prefree segments */
	unsigned int rec_prefree_segments;
720

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	/* for batched trimming */
	unsigned int trim_sections;		/* # of sections to trim */

724 725
	struct list_head sit_entry_set;	/* sit entry set list */

726 727
	unsigned int ipu_policy;	/* in-place-update policy */
	unsigned int min_ipu_util;	/* in-place-update threshold */
728
	unsigned int min_fsync_blocks;	/* threshold for fsync */
729
	unsigned int min_hot_blocks;	/* threshold for hot block allocation */
730 731

	/* for flush command control */
732
	struct flush_cmd_control *fcc_info;
733

734 735
	/* for discard command control */
	struct discard_cmd_control *dcc_info;
736 737 738 739 740 741 742 743 744 745 746
};

/*
 * For superblock
 */
/*
 * COUNT_TYPE for monitoring
 *
 * f2fs monitors the number of several block types such as on-writeback,
 * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
 */
747
#define WB_DATA_TYPE(p)	(__is_cp_guaranteed(p) ? F2FS_WB_CP_DATA : F2FS_WB_DATA)
748 749
enum count_type {
	F2FS_DIRTY_DENTS,
750
	F2FS_DIRTY_DATA,
751 752
	F2FS_DIRTY_NODES,
	F2FS_DIRTY_META,
753
	F2FS_INMEM_PAGES,
754
	F2FS_DIRTY_IMETA,
755 756
	F2FS_WB_CP_DATA,
	F2FS_WB_DATA,
757 758 759 760
	NR_COUNT_TYPE,
};

/*
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 * The below are the page types of bios used in submit_bio().
762 763 764 765 766 767 768 769 770
 * The available types are:
 * DATA			User data pages. It operates as async mode.
 * NODE			Node pages. It operates as async mode.
 * META			FS metadata pages such as SIT, NAT, CP.
 * NR_PAGE_TYPE		The number of page types.
 * META_FLUSH		Make sure the previous pages are written
 *			with waiting the bio's completion
 * ...			Only can be used with META.
 */
771
#define PAGE_TYPE_OF_BIO(type)	((type) > META ? META : (type))
772 773 774 775 776 777
enum page_type {
	DATA,
	NODE,
	META,
	NR_PAGE_TYPE,
	META_FLUSH,
778 779
	INMEM,		/* the below types are used by tracepoints only. */
	INMEM_DROP,
780
	INMEM_INVALIDATE,
781
	INMEM_REVOKE,
782 783
	IPU,
	OPU,
784 785
};

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struct f2fs_io_info {
787
	struct f2fs_sb_info *sbi;	/* f2fs_sb_info pointer */
788
	enum page_type type;	/* contains DATA/NODE/META/META_FLUSH */
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	int op;			/* contains REQ_OP_ */
790
	int op_flags;		/* req_flag_bits */
791
	block_t new_blkaddr;	/* new block address to be written */
792
	block_t old_blkaddr;	/* old block address before Cow */
793
	struct page *page;	/* page to be written */
794
	struct page *encrypted_page;	/* encrypted page */
795
	bool submitted;		/* indicate IO submission */
796
	bool cp_rwsem_locked;	/* indicate cp_rwsem is held */
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};

799
#define is_read_io(rw) ((rw) == READ)
800
struct f2fs_bio_info {
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	struct f2fs_sb_info *sbi;	/* f2fs superblock */
802 803
	struct bio *bio;		/* bios to merge */
	sector_t last_block_in_bio;	/* last block number */
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	struct f2fs_io_info fio;	/* store buffered io info. */
805
	struct rw_semaphore io_rwsem;	/* blocking op for bio */
806 807
};

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#define FDEV(i)				(sbi->devs[i])
#define RDEV(i)				(raw_super->devs[i])
struct f2fs_dev_info {
	struct block_device *bdev;
	char path[MAX_PATH_LEN];
	unsigned int total_segments;
	block_t start_blk;
	block_t end_blk;
#ifdef CONFIG_BLK_DEV_ZONED
	unsigned int nr_blkz;			/* Total number of zones */
	u8 *blkz_type;				/* Array of zones type */
#endif
};

822 823 824
enum inode_type {
	DIR_INODE,			/* for dirty dir inode */
	FILE_INODE,			/* for dirty regular/symlink inode */
825
	DIRTY_META,			/* for all dirtied inode metadata */
826 827 828
	NR_INODE_TYPE,
};

829 830 831 832 833 834 835 836
/* for inner inode cache management */
struct inode_management {
	struct radix_tree_root ino_root;	/* ino entry array */
	spinlock_t ino_lock;			/* for ino entry lock */
	struct list_head ino_list;		/* inode list head */
	unsigned long ino_num;			/* number of entries */
};

837 838 839 840 841 842
/* For s_flag in struct f2fs_sb_info */
enum {
	SBI_IS_DIRTY,				/* dirty flag for checkpoint */
	SBI_IS_CLOSE,				/* specify unmounting */
	SBI_NEED_FSCK,				/* need fsck.f2fs to fix */
	SBI_POR_DOING,				/* recovery is doing or not */
843
	SBI_NEED_SB_WRITE,			/* need to recover superblock */
844
	SBI_NEED_CP,				/* need to checkpoint */
845 846
};

847 848
enum {
	CP_TIME,
849
	REQ_TIME,
850 851 852
	MAX_TIME,
};

853 854
struct f2fs_sb_info {
	struct super_block *sb;			/* pointer to VFS super block */
855
	struct proc_dir_entry *s_proc;		/* proc entry */
856
	struct f2fs_super_block *raw_super;	/* raw super block pointer */
857
	int valid_super_block;			/* valid super block no */
858
	unsigned long s_flag;				/* flags for sbi */
859

860 861 862 863 864
#ifdef CONFIG_BLK_DEV_ZONED
	unsigned int blocks_per_blkz;		/* F2FS blocks per zone */
	unsigned int log_blocks_per_blkz;	/* log2 F2FS blocks per zone */
#endif

865 866 867 868 869 870
	/* for node-related operations */
	struct f2fs_nm_info *nm_info;		/* node manager */
	struct inode *node_inode;		/* cache node blocks */

	/* for segment-related operations */
	struct f2fs_sm_info *sm_info;		/* segment manager */
871 872

	/* for bio operations */
873
	struct f2fs_bio_info read_io;			/* for read bios */
874
	struct f2fs_bio_info write_io[NR_PAGE_TYPE];	/* for write bios */
875
	struct mutex wio_mutex[NODE + 1];	/* bio ordering for NODE/DATA */
876 877
	int write_io_size_bits;			/* Write IO size bits */
	mempool_t *write_io_dummy;		/* Dummy pages */
878 879 880

	/* for checkpoint */
	struct f2fs_checkpoint *ckpt;		/* raw checkpoint pointer */
881
	int cur_cp_pack;			/* remain current cp pack */
882
	spinlock_t cp_lock;			/* for flag in ckpt */
883
	struct inode *meta_inode;		/* cache meta blocks */
884
	struct mutex cp_mutex;			/* checkpoint procedure lock */
885
	struct rw_semaphore cp_rwsem;		/* blocking FS operations */
886
	struct rw_semaphore node_write;		/* locking node writes */
887
	struct rw_semaphore node_change;	/* locking node change */
888
	wait_queue_head_t cp_wait;
889 890
	unsigned long last_time[MAX_TIME];	/* to store time in jiffies */
	long interval_time[MAX_TIME];		/* to store thresholds */
891

892
	struct inode_management im[MAX_INO_ENTRY];      /* manage inode cache */
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	/* for orphan inode, use 0'th array */
895
	unsigned int max_orphans;		/* max orphan inodes */
896

897 898 899
	/* for inode management */
	struct list_head inode_list[NR_INODE_TYPE];	/* dirty inode list */
	spinlock_t inode_lock[NR_INODE_TYPE];	/* for dirty inode list lock */
900

901 902
	/* for extent tree cache */
	struct radix_tree_root extent_tree_root;/* cache extent cache entries */
903
	struct mutex extent_tree_lock;	/* locking extent radix tree */
904 905
	struct list_head extent_list;		/* lru list for shrinker */
	spinlock_t extent_lock;			/* locking extent lru list */
906
	atomic_t total_ext_tree;		/* extent tree count */
907
	struct list_head zombie_list;		/* extent zombie tree list */
908
	atomic_t total_zombie_tree;		/* extent zombie tree count */
909 910
	atomic_t total_ext_node;		/* extent info count */

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	/* basic filesystem units */
912 913 914 915 916 917 918 919 920 921 922 923 924
	unsigned int log_sectors_per_block;	/* log2 sectors per block */
	unsigned int log_blocksize;		/* log2 block size */
	unsigned int blocksize;			/* block size */
	unsigned int root_ino_num;		/* root inode number*/
	unsigned int node_ino_num;		/* node inode number*/
	unsigned int meta_ino_num;		/* meta inode number*/
	unsigned int log_blocks_per_seg;	/* log2 blocks per segment */
	unsigned int blocks_per_seg;		/* blocks per segment */
	unsigned int segs_per_sec;		/* segments per section */
	unsigned int secs_per_zone;		/* sections per zone */
	unsigned int total_sections;		/* total section count */
	unsigned int total_node_count;		/* total node block count */
	unsigned int total_valid_node_count;	/* valid node block count */
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	loff_t max_file_blocks;			/* max block index of file */
926
	int active_logs;			/* # of active logs */
927
	int dir_level;				/* directory level */
928 929 930

	block_t user_block_count;		/* # of user blocks */
	block_t total_valid_block_count;	/* # of valid blocks */
931
	block_t discard_blks;			/* discard command candidats */
932 933
	block_t last_valid_block_count;		/* for recovery */
	u32 s_next_generation;			/* for NFS support */
934 935

	/* # of pages, see count_type */
936
	atomic_t nr_pages[NR_COUNT_TYPE];
937 938
	/* # of allocated blocks */
	struct percpu_counter alloc_valid_block_count;
939

940 941 942
	/* writeback control */
	atomic_t wb_sync_req;			/* count # of WB_SYNC threads */

943 944 945
	/* valid inode count */
	struct percpu_counter total_valid_inode_count;

946 947 948 949 950
	struct f2fs_mount_info mount_opt;	/* mount options */

	/* for cleaning operations */
	struct mutex gc_mutex;			/* mutex for GC */
	struct f2fs_gc_kthread	*gc_thread;	/* GC thread */
951
	unsigned int cur_victim_sec;		/* current victim section num */
952

953 954 955
	/* threshold for converting bg victims for fg */
	u64 fggc_threshold;

956 957 958
	/* maximum # of trials to find a victim segment for SSR and GC */
	unsigned int max_victim_search;

959 960 961 962
	/*
	 * for stat information.
	 * one is for the LFS mode, and the other is for the SSR mode.
	 */
963
#ifdef CONFIG_F2FS_STAT_FS
964 965 966
	struct f2fs_stat_info *stat_info;	/* FS status information */
	unsigned int segment_count[2];		/* # of allocated segments */
	unsigned int block_count[2];		/* # of allocated blocks */
967
	atomic_t inplace_count;		/* # of inplace update */
968 969 970 971
	atomic64_t total_hit_ext;		/* # of lookup extent cache */
	atomic64_t read_hit_rbtree;		/* # of hit rbtree extent node */
	atomic64_t read_hit_largest;		/* # of hit largest extent node */
	atomic64_t read_hit_cached;		/* # of hit cached extent node */
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	atomic_t inline_xattr;			/* # of inline_xattr inodes */
973 974
	atomic_t inline_inode;			/* # of inline_data inodes */
	atomic_t inline_dir;			/* # of inline_dentry inodes */
975
	atomic_t aw_cnt;			/* # of atomic writes */
976
	atomic_t vw_cnt;			/* # of volatile writes */
977
	atomic_t max_aw_cnt;			/* max # of atomic writes */
978
	atomic_t max_vw_cnt;			/* max # of volatile writes */
979
	int bg_gc;				/* background gc calls */
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	unsigned int ndirty_inode[NR_INODE_TYPE];	/* # of dirty inodes */
981 982
#endif
	unsigned int last_victim[2];		/* last victim segment # */
983
	spinlock_t stat_lock;			/* lock for stat operations */
984 985 986 987

	/* For sysfs suppport */
	struct kobject s_kobj;
	struct completion s_kobj_unregister;
988 989 990

	/* For shrinker support */
	struct list_head s_list;
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	int s_ndevs;				/* number of devices */
	struct f2fs_dev_info *devs;		/* for device list */
993 994
	struct mutex umount_mutex;
	unsigned int shrinker_run_no;
995 996 997 998

	/* For write statistics */
	u64 sectors_written_start;
	u64 kbytes_written;
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	/* Reference to checksum algorithm driver via cryptoapi */
	struct crypto_shash *s_chksum_driver;
1002 1003 1004 1005 1006

	/* For fault injection */
#ifdef CONFIG_F2FS_FAULT_INJECTION
	struct f2fs_fault_info fault_info;
#endif
1007 1008
};

1009
#ifdef CONFIG_F2FS_FAULT_INJECTION
1010 1011 1012 1013
#define f2fs_show_injection_info(type)				\
	printk("%sF2FS-fs : inject %s in %s of %pF\n",		\
		KERN_INFO, fault_name[type],			\
		__func__, __builtin_return_address(0))
1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
{
	struct f2fs_fault_info *ffi = &sbi->fault_info;

	if (!ffi->inject_rate)
		return false;

	if (!IS_FAULT_SET(ffi, type))
		return false;

	atomic_inc(&ffi->inject_ops);
	if (atomic_read(&ffi->inject_ops) >= ffi->inject_rate) {
		atomic_set(&ffi->inject_ops, 0);
		return true;
	}
	return false;
}
#endif

1033 1034 1035 1036
/* For write statistics. Suppose sector size is 512 bytes,
 * and the return value is in kbytes. s is of struct f2fs_sb_info.
 */
#define BD_PART_WRITTEN(s)						 \
1037 1038
(((u64)part_stat_read((s)->sb->s_bdev->bd_part, sectors[1]) -		 \
		(s)->sectors_written_start) >> 1)
1039

1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
{
	sbi->last_time[type] = jiffies;
}

static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
{
	struct timespec ts = {sbi->interval_time[type], 0};
	unsigned long interval = timespec_to_jiffies(&ts);

	return time_after(jiffies, sbi->last_time[type] + interval);
}

1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
static inline bool is_idle(struct f2fs_sb_info *sbi)
{
	struct block_device *bdev = sbi->sb->s_bdev;
	struct request_queue *q = bdev_get_queue(bdev);
	struct request_list *rl = &q->root_rl;

	if (rl->count[BLK_RW_SYNC] || rl->count[BLK_RW_ASYNC])
		return 0;

	return f2fs_time_over(sbi, REQ_TIME);
}

1065 1066 1067
/*
 * Inline functions
 */
K
Keith Mok 已提交
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
			   unsigned int length)
{
	SHASH_DESC_ON_STACK(shash, sbi->s_chksum_driver);
	u32 *ctx = (u32 *)shash_desc_ctx(shash);
	int err;

	shash->tfm = sbi->s_chksum_driver;
	shash->flags = 0;
	*ctx = F2FS_SUPER_MAGIC;

	err = crypto_shash_update(shash, address, length);
	BUG_ON(err);

	return *ctx;
}

static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
				  void *buf, size_t buf_size)
{
	return f2fs_crc32(sbi, buf, buf_size) == blk_crc;
}

1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
{
	return container_of(inode, struct f2fs_inode_info, vfs_inode);
}

static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
static inline struct f2fs_sb_info *F2FS_I_SB(struct inode *inode)
{
	return F2FS_SB(inode->i_sb);
}

static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
{
	return F2FS_I_SB(mapping->host);
}

static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
{
	return F2FS_M_SB(page->mapping);
}

1116 1117 1118 1119 1120 1121 1122 1123 1124 1125
static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_super_block *)(sbi->raw_super);
}

static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_checkpoint *)(sbi->ckpt);
}

1126 1127 1128 1129 1130
static inline struct f2fs_node *F2FS_NODE(struct page *page)
{
	return (struct f2fs_node *)page_address(page);
}

1131 1132 1133 1134 1135
static inline struct f2fs_inode *F2FS_INODE(struct page *page)
{
	return &((struct f2fs_node *)page_address(page))->i;
}

1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_nm_info *)(sbi->nm_info);
}

static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
{
	return (struct f2fs_sm_info *)(sbi->sm_info);
}

static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
{
	return (struct sit_info *)(SM_I(sbi)->sit_info);
}

static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
{
	return (struct free_segmap_info *)(SM_I(sbi)->free_info);
}

static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
{
	return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
}

G
Gu Zheng 已提交
1161 1162 1163 1164 1165
static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
{
	return sbi->meta_inode->i_mapping;
}

1166 1167 1168 1169 1170
static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
{
	return sbi->node_inode->i_mapping;
}

1171 1172
static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
{
1173
	return test_bit(type, &sbi->s_flag);
1174 1175 1176
}

static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
1177
{
1178
	set_bit(type, &sbi->s_flag);
1179 1180
}

1181
static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
1182
{
1183
	clear_bit(type, &sbi->s_flag);
1184 1185
}

1186 1187 1188 1189 1190
static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
{
	return le64_to_cpu(cp->checkpoint_ver);
}

1191 1192 1193 1194 1195 1196
static inline __u64 cur_cp_crc(struct f2fs_checkpoint *cp)
{
	size_t crc_offset = le32_to_cpu(cp->checksum_offset);
	return le32_to_cpu(*((__le32 *)((unsigned char *)cp + crc_offset)));
}

1197
static inline bool __is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
1198 1199
{
	unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
1200

1201 1202 1203
	return ckpt_flags & f;
}

1204
static inline bool is_set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
1205
{
1206 1207 1208 1209 1210 1211 1212 1213
	return __is_set_ckpt_flags(F2FS_CKPT(sbi), f);
}

static inline void __set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
	unsigned int ckpt_flags;

	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
1214 1215 1216 1217
	ckpt_flags |= f;
	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}

1218
static inline void set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
1219
{
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
	spin_lock(&sbi->cp_lock);
	__set_ckpt_flags(F2FS_CKPT(sbi), f);
	spin_unlock(&sbi->cp_lock);
}

static inline void __clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
	unsigned int ckpt_flags;

	ckpt_flags = le32_to_cpu(cp->ckpt_flags);
1230 1231 1232 1233
	ckpt_flags &= (~f);
	cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}

1234 1235 1236 1237 1238 1239 1240
static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
	spin_lock(&sbi->cp_lock);
	__clear_ckpt_flags(F2FS_CKPT(sbi), f);
	spin_unlock(&sbi->cp_lock);
}

1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
{
	set_sbi_flag(sbi, SBI_NEED_FSCK);

	if (lock)
		spin_lock(&sbi->cp_lock);
	__clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
	kfree(NM_I(sbi)->nat_bits);
	NM_I(sbi)->nat_bits = NULL;
	if (lock)
		spin_unlock(&sbi->cp_lock);
}

static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
					struct cp_control *cpc)
{
	bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);

	return (cpc) ? (cpc->reason == CP_UMOUNT) && set : set;
}

1262
static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
1263
{
1264
	down_read(&sbi->cp_rwsem);
1265 1266
}

1267
static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
1268
{
1269
	up_read(&sbi->cp_rwsem);
1270 1271
}

1272
static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
1273
{
1274
	down_write(&sbi->cp_rwsem);
1275 1276
}

1277
static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
1278
{
1279
	up_write(&sbi->cp_rwsem);
1280 1281
}

1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
{
	int reason = CP_SYNC;

	if (test_opt(sbi, FASTBOOT))
		reason = CP_FASTBOOT;
	if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))
		reason = CP_UMOUNT;
	return reason;
}

static inline bool __remain_node_summaries(int reason)
{
	return (reason == CP_UMOUNT || reason == CP_FASTBOOT);
}

static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)
{
1300 1301
	return (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG) ||
			is_set_ckpt_flags(sbi, CP_FASTBOOT_FLAG));
1302 1303
}

1304 1305 1306
/*
 * Check whether the given nid is within node id range.
 */
1307
static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
1308
{
1309 1310
	if (unlikely(nid < F2FS_ROOT_INO(sbi)))
		return -EINVAL;
1311
	if (unlikely(nid >= NM_I(sbi)->max_nid))
1312 1313
		return -EINVAL;
	return 0;
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323
}

#define F2FS_DEFAULT_ALLOCATED_BLOCKS	1

/*
 * Check whether the inode has blocks or not
 */
static inline int F2FS_HAS_BLOCKS(struct inode *inode)
{
	if (F2FS_I(inode)->i_xattr_nid)
C
Chris Fries 已提交
1324
		return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
1325
	else
C
Chris Fries 已提交
1326
		return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
1327 1328
}

1329 1330 1331 1332 1333
static inline bool f2fs_has_xattr_block(unsigned int ofs)
{
	return ofs == XATTR_NODE_OFFSET;
}

1334
static inline void f2fs_i_blocks_write(struct inode *, blkcnt_t, bool);
1335
static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
1336
				 struct inode *inode, blkcnt_t *count)
1337
{
1338
	blkcnt_t diff;
1339

J
Jaegeuk Kim 已提交
1340
#ifdef CONFIG_F2FS_FAULT_INJECTION
1341 1342
	if (time_to_inject(sbi, FAULT_BLOCK)) {
		f2fs_show_injection_info(FAULT_BLOCK);
J
Jaegeuk Kim 已提交
1343
		return false;
1344
	}
J
Jaegeuk Kim 已提交
1345
#endif
1346 1347 1348 1349 1350 1351
	/*
	 * let's increase this in prior to actual block count change in order
	 * for f2fs_sync_file to avoid data races when deciding checkpoint.
	 */
	percpu_counter_add(&sbi->alloc_valid_block_count, (*count));

1352 1353 1354
	spin_lock(&sbi->stat_lock);
	sbi->total_valid_block_count += (block_t)(*count);
	if (unlikely(sbi->total_valid_block_count > sbi->user_block_count)) {
1355 1356
		diff = sbi->total_valid_block_count - sbi->user_block_count;
		*count -= diff;
1357
		sbi->total_valid_block_count = sbi->user_block_count;
1358 1359
		if (!*count) {
			spin_unlock(&sbi->stat_lock);
1360
			percpu_counter_sub(&sbi->alloc_valid_block_count, diff);
1361 1362
			return false;
		}
1363 1364
	}
	spin_unlock(&sbi->stat_lock);
1365

1366
	f2fs_i_blocks_write(inode, *count, true);
1367 1368 1369
	return true;
}

1370
static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
1371 1372 1373 1374
						struct inode *inode,
						blkcnt_t count)
{
	spin_lock(&sbi->stat_lock);
1375 1376
	f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
	f2fs_bug_on(sbi, inode->i_blocks < count);
1377 1378
	sbi->total_valid_block_count -= (block_t)count;
	spin_unlock(&sbi->stat_lock);
1379
	f2fs_i_blocks_write(inode, count, false);
1380 1381 1382 1383
}

static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
{
1384
	atomic_inc(&sbi->nr_pages[count_type]);
1385

1386 1387
	if (count_type == F2FS_DIRTY_DATA || count_type == F2FS_INMEM_PAGES ||
		count_type == F2FS_WB_CP_DATA || count_type == F2FS_WB_DATA)
1388 1389
		return;

1390
	set_sbi_flag(sbi, SBI_IS_DIRTY);
1391 1392
}

1393
static inline void inode_inc_dirty_pages(struct inode *inode)
1394
{
1395
	atomic_inc(&F2FS_I(inode)->dirty_pages);
1396 1397
	inc_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
				F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
1398 1399 1400 1401
}

static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
{
1402
	atomic_dec(&sbi->nr_pages[count_type]);
1403 1404
}

1405
static inline void inode_dec_dirty_pages(struct inode *inode)
1406
{
1407 1408
	if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
			!S_ISLNK(inode->i_mode))
1409 1410
		return;

1411
	atomic_dec(&F2FS_I(inode)->dirty_pages);
1412 1413
	dec_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
				F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
1414 1415
}

1416
static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
1417
{
1418
	return atomic_read(&sbi->nr_pages[count_type]);
1419 1420
}

1421
static inline int get_dirty_pages(struct inode *inode)
1422
{
1423
	return atomic_read(&F2FS_I(inode)->dirty_pages);
1424 1425
}

1426 1427
static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
{
1428
	unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
1429 1430 1431 1432
	unsigned int segs = (get_pages(sbi, block_type) + pages_per_sec - 1) >>
						sbi->log_blocks_per_seg;

	return segs / sbi->segs_per_sec;
1433 1434
}

1435 1436
static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
{
1437
	return sbi->total_valid_block_count;
1438 1439
}

1440 1441 1442 1443 1444
static inline block_t discard_blocks(struct f2fs_sb_info *sbi)
{
	return sbi->discard_blks;
}

1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
{
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);

	/* return NAT or SIT bitmap */
	if (flag == NAT_BITMAP)
		return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
	else if (flag == SIT_BITMAP)
		return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);

	return 0;
}

W
Wanpeng Li 已提交
1458 1459 1460 1461 1462
static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
{
	return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
}

1463 1464 1465
static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
{
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
C
Changman Lee 已提交
1466 1467
	int offset;

W
Wanpeng Li 已提交
1468
	if (__cp_payload(sbi) > 0) {
C
Changman Lee 已提交
1469 1470 1471
		if (flag == NAT_BITMAP)
			return &ckpt->sit_nat_version_bitmap;
		else
J
Jaegeuk Kim 已提交
1472
			return (unsigned char *)ckpt + F2FS_BLKSIZE;
C
Changman Lee 已提交
1473 1474
	} else {
		offset = (flag == NAT_BITMAP) ?
1475
			le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
C
Changman Lee 已提交
1476 1477
		return &ckpt->sit_nat_version_bitmap + offset;
	}
1478 1479 1480 1481
}

static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
{
1482
	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
1483

1484
	if (sbi->cur_cp_pack == 2)
1485
		start_addr += sbi->blocks_per_seg;
1486 1487
	return start_addr;
}
1488

1489 1490 1491
static inline block_t __start_cp_next_addr(struct f2fs_sb_info *sbi)
{
	block_t start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
1492

1493 1494
	if (sbi->cur_cp_pack == 1)
		start_addr += sbi->blocks_per_seg;
1495 1496 1497
	return start_addr;
}

1498 1499 1500 1501 1502
static inline void __set_cp_next_pack(struct f2fs_sb_info *sbi)
{
	sbi->cur_cp_pack = (sbi->cur_cp_pack == 1) ? 2 : 1;
}

1503 1504 1505 1506 1507 1508
static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
{
	return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
}

static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
1509
						struct inode *inode)
1510 1511 1512 1513 1514 1515
{
	block_t	valid_block_count;
	unsigned int valid_node_count;

	spin_lock(&sbi->stat_lock);

1516
	valid_block_count = sbi->total_valid_block_count + 1;
1517
	if (unlikely(valid_block_count > sbi->user_block_count)) {
1518 1519 1520 1521
		spin_unlock(&sbi->stat_lock);
		return false;
	}

1522
	valid_node_count = sbi->total_valid_node_count + 1;
1523
	if (unlikely(valid_node_count > sbi->total_node_count)) {
1524 1525 1526 1527 1528
		spin_unlock(&sbi->stat_lock);
		return false;
	}

	if (inode)
1529
		f2fs_i_blocks_write(inode, 1, true);
1530 1531 1532

	sbi->total_valid_node_count++;
	sbi->total_valid_block_count++;
1533 1534
	spin_unlock(&sbi->stat_lock);

1535
	percpu_counter_inc(&sbi->alloc_valid_block_count);
1536 1537 1538 1539
	return true;
}

static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
1540
						struct inode *inode)
1541 1542 1543
{
	spin_lock(&sbi->stat_lock);

1544 1545 1546
	f2fs_bug_on(sbi, !sbi->total_valid_block_count);
	f2fs_bug_on(sbi, !sbi->total_valid_node_count);
	f2fs_bug_on(sbi, !inode->i_blocks);
1547

1548
	f2fs_i_blocks_write(inode, 1, false);
1549 1550
	sbi->total_valid_node_count--;
	sbi->total_valid_block_count--;
1551 1552 1553 1554 1555 1556

	spin_unlock(&sbi->stat_lock);
}

static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
{
1557
	return sbi->total_valid_node_count;
1558 1559 1560 1561
}

static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
{
1562
	percpu_counter_inc(&sbi->total_valid_inode_count);
1563 1564
}

1565
static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
1566
{
1567
	percpu_counter_dec(&sbi->total_valid_inode_count);
1568 1569
}

1570
static inline s64 valid_inode_count(struct f2fs_sb_info *sbi)
1571
{
1572
	return percpu_counter_sum_positive(&sbi->total_valid_inode_count);
1573 1574
}

1575 1576 1577
static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
						pgoff_t index, bool for_write)
{
1578 1579
#ifdef CONFIG_F2FS_FAULT_INJECTION
	struct page *page = find_lock_page(mapping, index);
1580

1581 1582 1583
	if (page)
		return page;

1584 1585
	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC)) {
		f2fs_show_injection_info(FAULT_PAGE_ALLOC);
1586
		return NULL;
1587
	}
1588
#endif
1589 1590 1591 1592 1593
	if (!for_write)
		return grab_cache_page(mapping, index);
	return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
}

1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
static inline void f2fs_copy_page(struct page *src, struct page *dst)
{
	char *src_kaddr = kmap(src);
	char *dst_kaddr = kmap(dst);

	memcpy(dst_kaddr, src_kaddr, PAGE_SIZE);
	kunmap(dst);
	kunmap(src);
}

1604 1605
static inline void f2fs_put_page(struct page *page, int unlock)
{
1606
	if (!page)
1607 1608 1609
		return;

	if (unlock) {
1610
		f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
1611 1612
		unlock_page(page);
	}
1613
	put_page(page);
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626
}

static inline void f2fs_put_dnode(struct dnode_of_data *dn)
{
	if (dn->node_page)
		f2fs_put_page(dn->node_page, 1);
	if (dn->inode_page && dn->node_page != dn->inode_page)
		f2fs_put_page(dn->inode_page, 0);
	dn->node_page = NULL;
	dn->inode_page = NULL;
}

static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
1627
					size_t size)
1628
{
1629
	return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
1630 1631
}

1632 1633 1634 1635 1636
static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
						gfp_t flags)
{
	void *entry;

1637 1638 1639
	entry = kmem_cache_alloc(cachep, flags);
	if (!entry)
		entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
1640 1641 1642
	return entry;
}

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1643 1644 1645 1646 1647 1648
static inline struct bio *f2fs_bio_alloc(int npages)
{
	struct bio *bio;

	/* No failure on bio allocation */
	bio = bio_alloc(GFP_NOIO, npages);
1649 1650
	if (!bio)
		bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
J
Jaegeuk Kim 已提交
1651 1652 1653
	return bio;
}

1654 1655 1656 1657 1658 1659 1660
static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
				unsigned long index, void *item)
{
	while (radix_tree_insert(root, index, item))
		cond_resched();
}

1661 1662 1663 1664
#define RAW_IS_INODE(p)	((p)->footer.nid == (p)->footer.ino)

static inline bool IS_INODE(struct page *page)
{
1665
	struct f2fs_node *p = F2FS_NODE(page);
1666

1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679
	return RAW_IS_INODE(p);
}

static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
{
	return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
}

static inline block_t datablock_addr(struct page *node_page,
		unsigned int offset)
{
	struct f2fs_node *raw_node;
	__le32 *addr_array;
1680

1681
	raw_node = F2FS_NODE(node_page);
1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
	addr_array = blkaddr_in_node(raw_node);
	return le32_to_cpu(addr_array[offset]);
}

static inline int f2fs_test_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	return mask & *addr;
}

1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
static inline void f2fs_set_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr |= mask;
}

static inline void f2fs_clear_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr &= ~mask;
}

1713
static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724
{
	int mask;
	int ret;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	ret = mask & *addr;
	*addr |= mask;
	return ret;
}

1725
static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736
{
	int mask;
	int ret;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	ret = mask & *addr;
	*addr &= ~mask;
	return ret;
}

1737 1738 1739 1740 1741 1742 1743 1744 1745
static inline void f2fs_change_bit(unsigned int nr, char *addr)
{
	int mask;

	addr += (nr >> 3);
	mask = 1 << (7 - (nr & 0x07));
	*addr ^= mask;
}

1746 1747 1748
/* used for f2fs_inode_info->flags */
enum {
	FI_NEW_INODE,		/* indicate newly allocated inode */
1749
	FI_DIRTY_INODE,		/* indicate inode is dirty or not */
1750
	FI_AUTO_RECOVER,	/* indicate inode is recoverable */
1751
	FI_DIRTY_DIR,		/* indicate directory has dirty pages */
1752 1753 1754
	FI_INC_LINK,		/* need to increment i_nlink */
	FI_ACL_MODE,		/* indicate acl mode */
	FI_NO_ALLOC,		/* should not allocate any blocks */
1755
	FI_FREE_NID,		/* free allocated nide */
1756
	FI_NO_EXTENT,		/* not to use the extent cache */
J
Jaegeuk Kim 已提交
1757
	FI_INLINE_XATTR,	/* used for inline xattr */
1758
	FI_INLINE_DATA,		/* used for inline data*/
1759
	FI_INLINE_DENTRY,	/* used for inline dentry */
1760 1761
	FI_APPEND_WRITE,	/* inode has appended data */
	FI_UPDATE_WRITE,	/* inode has in-place-update data */
J
Jaegeuk Kim 已提交
1762 1763
	FI_NEED_IPU,		/* used for ipu per file */
	FI_ATOMIC_FILE,		/* indicate atomic file */
C
Chao Yu 已提交
1764
	FI_ATOMIC_COMMIT,	/* indicate the state of atomical committing */
1765
	FI_VOLATILE_FILE,	/* indicate volatile file */
1766
	FI_FIRST_BLOCK_WRITTEN,	/* indicate #0 data block was written */
1767
	FI_DROP_CACHE,		/* drop dirty page cache */
1768
	FI_DATA_EXIST,		/* indicate data exists */
1769
	FI_INLINE_DOTS,		/* indicate inline dot dentries */
C
Chao Yu 已提交
1770
	FI_DO_DEFRAG,		/* indicate defragment is running */
1771
	FI_DIRTY_FILE,		/* indicate regular/symlink has dirty pages */
1772
	FI_NO_PREALLOC,		/* indicate skipped preallocated blocks */
1773
	FI_HOT_DATA,		/* indicate file is hot */
1774 1775
};

1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
static inline void __mark_inode_dirty_flag(struct inode *inode,
						int flag, bool set)
{
	switch (flag) {
	case FI_INLINE_XATTR:
	case FI_INLINE_DATA:
	case FI_INLINE_DENTRY:
		if (set)
			return;
	case FI_DATA_EXIST:
	case FI_INLINE_DOTS:
1787
		f2fs_mark_inode_dirty_sync(inode, true);
1788 1789 1790
	}
}

1791
static inline void set_inode_flag(struct inode *inode, int flag)
1792
{
1793 1794
	if (!test_bit(flag, &F2FS_I(inode)->flags))
		set_bit(flag, &F2FS_I(inode)->flags);
1795
	__mark_inode_dirty_flag(inode, flag, true);
1796 1797
}

1798
static inline int is_inode_flag_set(struct inode *inode, int flag)
1799
{
1800
	return test_bit(flag, &F2FS_I(inode)->flags);
1801 1802
}

1803
static inline void clear_inode_flag(struct inode *inode, int flag)
1804
{
1805 1806
	if (test_bit(flag, &F2FS_I(inode)->flags))
		clear_bit(flag, &F2FS_I(inode)->flags);
1807
	__mark_inode_dirty_flag(inode, flag, false);
1808 1809
}

1810
static inline void set_acl_inode(struct inode *inode, umode_t mode)
1811
{
1812 1813
	F2FS_I(inode)->i_acl_mode = mode;
	set_inode_flag(inode, FI_ACL_MODE);
1814
	f2fs_mark_inode_dirty_sync(inode, false);
1815 1816
}

1817
static inline void f2fs_i_links_write(struct inode *inode, bool inc)
1818
{
1819 1820 1821 1822
	if (inc)
		inc_nlink(inode);
	else
		drop_nlink(inode);
1823
	f2fs_mark_inode_dirty_sync(inode, true);
1824 1825
}

1826 1827 1828
static inline void f2fs_i_blocks_write(struct inode *inode,
					blkcnt_t diff, bool add)
{
1829 1830 1831
	bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
	bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);

1832 1833
	inode->i_blocks = add ? inode->i_blocks + diff :
				inode->i_blocks - diff;
1834
	f2fs_mark_inode_dirty_sync(inode, true);
1835 1836
	if (clean || recover)
		set_inode_flag(inode, FI_AUTO_RECOVER);
1837 1838
}

1839 1840
static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size)
{
1841 1842 1843
	bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
	bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);

1844 1845 1846 1847
	if (i_size_read(inode) == i_size)
		return;

	i_size_write(inode, i_size);
1848
	f2fs_mark_inode_dirty_sync(inode, true);
1849 1850
	if (clean || recover)
		set_inode_flag(inode, FI_AUTO_RECOVER);
1851 1852
}

1853
static inline void f2fs_i_depth_write(struct inode *inode, unsigned int depth)
1854
{
1855
	F2FS_I(inode)->i_current_depth = depth;
1856
	f2fs_mark_inode_dirty_sync(inode, true);
1857 1858
}

1859
static inline void f2fs_i_xnid_write(struct inode *inode, nid_t xnid)
J
Jaegeuk Kim 已提交
1860
{
1861
	F2FS_I(inode)->i_xattr_nid = xnid;
1862
	f2fs_mark_inode_dirty_sync(inode, true);
1863 1864 1865 1866 1867
}

static inline void f2fs_i_pino_write(struct inode *inode, nid_t pino)
{
	F2FS_I(inode)->i_pino = pino;
1868
	f2fs_mark_inode_dirty_sync(inode, true);
1869 1870
}

1871
static inline void get_inline_info(struct inode *inode, struct f2fs_inode *ri)
J
Jaegeuk Kim 已提交
1872
{
1873 1874
	struct f2fs_inode_info *fi = F2FS_I(inode);

J
Jaegeuk Kim 已提交
1875
	if (ri->i_inline & F2FS_INLINE_XATTR)
1876
		set_bit(FI_INLINE_XATTR, &fi->flags);
1877
	if (ri->i_inline & F2FS_INLINE_DATA)
1878
		set_bit(FI_INLINE_DATA, &fi->flags);
1879
	if (ri->i_inline & F2FS_INLINE_DENTRY)
1880
		set_bit(FI_INLINE_DENTRY, &fi->flags);
1881
	if (ri->i_inline & F2FS_DATA_EXIST)
1882
		set_bit(FI_DATA_EXIST, &fi->flags);
1883
	if (ri->i_inline & F2FS_INLINE_DOTS)
1884
		set_bit(FI_INLINE_DOTS, &fi->flags);
J
Jaegeuk Kim 已提交
1885 1886
}

1887
static inline void set_raw_inline(struct inode *inode, struct f2fs_inode *ri)
J
Jaegeuk Kim 已提交
1888 1889 1890
{
	ri->i_inline = 0;

1891
	if (is_inode_flag_set(inode, FI_INLINE_XATTR))
J
Jaegeuk Kim 已提交
1892
		ri->i_inline |= F2FS_INLINE_XATTR;
1893
	if (is_inode_flag_set(inode, FI_INLINE_DATA))
1894
		ri->i_inline |= F2FS_INLINE_DATA;
1895
	if (is_inode_flag_set(inode, FI_INLINE_DENTRY))
1896
		ri->i_inline |= F2FS_INLINE_DENTRY;
1897
	if (is_inode_flag_set(inode, FI_DATA_EXIST))
1898
		ri->i_inline |= F2FS_DATA_EXIST;
1899
	if (is_inode_flag_set(inode, FI_INLINE_DOTS))
1900
		ri->i_inline |= F2FS_INLINE_DOTS;
J
Jaegeuk Kim 已提交
1901 1902
}

1903 1904
static inline int f2fs_has_inline_xattr(struct inode *inode)
{
1905
	return is_inode_flag_set(inode, FI_INLINE_XATTR);
1906 1907
}

1908
static inline unsigned int addrs_per_inode(struct inode *inode)
1909
{
1910
	if (f2fs_has_inline_xattr(inode))
1911 1912 1913 1914
		return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
	return DEF_ADDRS_PER_INODE;
}

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Jaegeuk Kim 已提交
1915 1916
static inline void *inline_xattr_addr(struct page *page)
{
1917
	struct f2fs_inode *ri = F2FS_INODE(page);
1918

J
Jaegeuk Kim 已提交
1919 1920 1921 1922 1923 1924
	return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
					F2FS_INLINE_XATTR_ADDRS]);
}

static inline int inline_xattr_size(struct inode *inode)
{
1925
	if (f2fs_has_inline_xattr(inode))
J
Jaegeuk Kim 已提交
1926 1927 1928 1929 1930
		return F2FS_INLINE_XATTR_ADDRS << 2;
	else
		return 0;
}

1931 1932
static inline int f2fs_has_inline_data(struct inode *inode)
{
1933
	return is_inode_flag_set(inode, FI_INLINE_DATA);
1934 1935
}

1936 1937
static inline int f2fs_exist_data(struct inode *inode)
{
1938
	return is_inode_flag_set(inode, FI_DATA_EXIST);
1939 1940
}

1941 1942
static inline int f2fs_has_inline_dots(struct inode *inode)
{
1943
	return is_inode_flag_set(inode, FI_INLINE_DOTS);
1944 1945
}

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Jaegeuk Kim 已提交
1946 1947
static inline bool f2fs_is_atomic_file(struct inode *inode)
{
1948
	return is_inode_flag_set(inode, FI_ATOMIC_FILE);
J
Jaegeuk Kim 已提交
1949 1950
}

C
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1951 1952 1953 1954 1955
static inline bool f2fs_is_commit_atomic_write(struct inode *inode)
{
	return is_inode_flag_set(inode, FI_ATOMIC_COMMIT);
}

1956 1957
static inline bool f2fs_is_volatile_file(struct inode *inode)
{
1958
	return is_inode_flag_set(inode, FI_VOLATILE_FILE);
1959 1960
}

1961 1962
static inline bool f2fs_is_first_block_written(struct inode *inode)
{
1963
	return is_inode_flag_set(inode, FI_FIRST_BLOCK_WRITTEN);
1964 1965
}

1966 1967
static inline bool f2fs_is_drop_cache(struct inode *inode)
{
1968
	return is_inode_flag_set(inode, FI_DROP_CACHE);
1969 1970
}

1971 1972
static inline void *inline_data_addr(struct page *page)
{
1973
	struct f2fs_inode *ri = F2FS_INODE(page);
1974

1975 1976 1977
	return (void *)&(ri->i_addr[1]);
}

1978 1979
static inline int f2fs_has_inline_dentry(struct inode *inode)
{
1980
	return is_inode_flag_set(inode, FI_INLINE_DENTRY);
1981 1982
}

1983 1984 1985 1986 1987 1988
static inline void f2fs_dentry_kunmap(struct inode *dir, struct page *page)
{
	if (!f2fs_has_inline_dentry(dir))
		kunmap(page);
}

1989 1990 1991 1992 1993 1994 1995 1996
static inline int is_file(struct inode *inode, int type)
{
	return F2FS_I(inode)->i_advise & type;
}

static inline void set_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise |= type;
1997
	f2fs_mark_inode_dirty_sync(inode, true);
1998 1999 2000 2001 2002
}

static inline void clear_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise &= ~type;
2003
	f2fs_mark_inode_dirty_sync(inode, true);
2004 2005
}

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
static inline bool f2fs_skip_inode_update(struct inode *inode, int dsync)
{
	if (dsync) {
		struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
		bool ret;

		spin_lock(&sbi->inode_lock[DIRTY_META]);
		ret = list_empty(&F2FS_I(inode)->gdirty_list);
		spin_unlock(&sbi->inode_lock[DIRTY_META]);
		return ret;
	}
	if (!is_inode_flag_set(inode, FI_AUTO_RECOVER) ||
			file_keep_isize(inode) ||
			i_size_read(inode) & PAGE_MASK)
		return false;
	return F2FS_I(inode)->last_disk_size == i_size_read(inode);
2022 2023
}

J
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2024 2025 2026 2027 2028
static inline int f2fs_readonly(struct super_block *sb)
{
	return sb->s_flags & MS_RDONLY;
}

2029 2030
static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
{
2031
	return is_set_ckpt_flags(sbi, CP_ERROR_FLAG);
2032 2033
}

2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044
static inline bool is_dot_dotdot(const struct qstr *str)
{
	if (str->len == 1 && str->name[0] == '.')
		return true;

	if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
		return true;

	return false;
}

J
Jaegeuk Kim 已提交
2045 2046 2047
static inline bool f2fs_may_extent_tree(struct inode *inode)
{
	if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE) ||
2048
			is_inode_flag_set(inode, FI_NO_EXTENT))
J
Jaegeuk Kim 已提交
2049 2050
		return false;

A
Al Viro 已提交
2051
	return S_ISREG(inode->i_mode);
J
Jaegeuk Kim 已提交
2052 2053
}

2054 2055
static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
					size_t size, gfp_t flags)
2056
{
J
Jaegeuk Kim 已提交
2057
#ifdef CONFIG_F2FS_FAULT_INJECTION
2058 2059
	if (time_to_inject(sbi, FAULT_KMALLOC)) {
		f2fs_show_injection_info(FAULT_KMALLOC);
J
Jaegeuk Kim 已提交
2060
		return NULL;
2061
	}
J
Jaegeuk Kim 已提交
2062
#endif
2063 2064 2065
	return kmalloc(size, flags);
}

2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
static inline void *f2fs_kvmalloc(size_t size, gfp_t flags)
{
	void *ret;

	ret = kmalloc(size, flags | __GFP_NOWARN);
	if (!ret)
		ret = __vmalloc(size, flags, PAGE_KERNEL);
	return ret;
}

static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
{
	void *ret;

	ret = kzalloc(size, flags | __GFP_NOWARN);
	if (!ret)
		ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
	return ret;
}

2086
#define get_inode_mode(i) \
2087
	((is_inode_flag_set(i, FI_ACL_MODE)) ? \
2088 2089
	 (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))

2090 2091 2092
/*
 * file.c
 */
2093 2094 2095 2096
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
void truncate_data_blocks(struct dnode_of_data *dn);
int truncate_blocks(struct inode *inode, u64 from, bool lock);
int f2fs_truncate(struct inode *inode);
2097 2098
int f2fs_getattr(const struct path *path, struct kstat *stat,
			u32 request_mask, unsigned int flags);
2099 2100 2101 2102 2103
int f2fs_setattr(struct dentry *dentry, struct iattr *attr);
int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end);
int truncate_data_blocks_range(struct dnode_of_data *dn, int count);
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2104 2105 2106 2107

/*
 * inode.c
 */
2108 2109 2110 2111 2112 2113 2114 2115 2116
void f2fs_set_inode_flags(struct inode *inode);
struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
int update_inode(struct inode *inode, struct page *node_page);
int update_inode_page(struct inode *inode);
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc);
void f2fs_evict_inode(struct inode *inode);
void handle_failed_inode(struct inode *inode);
2117 2118 2119 2120 2121 2122 2123 2124 2125

/*
 * namei.c
 */
struct dentry *f2fs_get_parent(struct dentry *child);

/*
 * dir.c
 */
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164
void set_de_type(struct f2fs_dir_entry *de, umode_t mode);
unsigned char get_de_type(struct f2fs_dir_entry *de);
struct f2fs_dir_entry *find_target_dentry(struct fscrypt_name *fname,
			f2fs_hash_t namehash, int *max_slots,
			struct f2fs_dentry_ptr *d);
int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
			unsigned int start_pos, struct fscrypt_str *fstr);
void do_make_empty_dir(struct inode *inode, struct inode *parent,
			struct f2fs_dentry_ptr *d);
struct page *init_inode_metadata(struct inode *inode, struct inode *dir,
			const struct qstr *new_name,
			const struct qstr *orig_name, struct page *dpage);
void update_parent_metadata(struct inode *dir, struct inode *inode,
			unsigned int current_depth);
int room_for_filename(const void *bitmap, int slots, int max_slots);
void f2fs_drop_nlink(struct inode *dir, struct inode *inode);
struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
			struct fscrypt_name *fname, struct page **res_page);
struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
			const struct qstr *child, struct page **res_page);
struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p);
ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
			struct page **page);
void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
			struct page *page, struct inode *inode);
void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
			const struct qstr *name, f2fs_hash_t name_hash,
			unsigned int bit_pos);
int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
			const struct qstr *orig_name,
			struct inode *inode, nid_t ino, umode_t mode);
int __f2fs_do_add_link(struct inode *dir, struct fscrypt_name *fname,
			struct inode *inode, nid_t ino, umode_t mode);
int __f2fs_add_link(struct inode *dir, const struct qstr *name,
			struct inode *inode, nid_t ino, umode_t mode);
void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
			struct inode *dir, struct inode *inode);
int f2fs_do_tmpfile(struct inode *inode, struct inode *dir);
bool f2fs_empty_dir(struct inode *dir);
2165

2166 2167
static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
{
2168
	return __f2fs_add_link(d_inode(dentry->d_parent), &dentry->d_name,
2169
				inode, inode->i_ino, inode->i_mode);
2170 2171
}

2172 2173 2174
/*
 * super.c
 */
2175 2176 2177 2178
int f2fs_inode_dirtied(struct inode *inode, bool sync);
void f2fs_inode_synced(struct inode *inode);
int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
int f2fs_sync_fs(struct super_block *sb, int sync);
2179
extern __printf(3, 4)
2180
void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
2181
int sanity_check_ckpt(struct f2fs_sb_info *sbi);
2182 2183 2184 2185

/*
 * hash.c
 */
2186
f2fs_hash_t f2fs_dentry_hash(const struct qstr *name_info);
2187 2188 2189 2190 2191 2192 2193

/*
 * node.c
 */
struct dnode_of_data;
struct node_info;

2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
bool available_free_memory(struct f2fs_sb_info *sbi, int type);
int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid);
bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid);
bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino);
void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni);
pgoff_t get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs);
int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode);
int truncate_inode_blocks(struct inode *inode, pgoff_t from);
int truncate_xattr_node(struct inode *inode, struct page *page);
int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino);
int remove_inode_page(struct inode *inode);
struct page *new_inode_page(struct inode *inode);
struct page *new_node_page(struct dnode_of_data *dn,
			unsigned int ofs, struct page *ipage);
void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
struct page *get_node_page_ra(struct page *parent, int start);
void move_node_page(struct page *node_page, int gc_type);
int fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
			struct writeback_control *wbc, bool atomic);
int sync_node_pages(struct f2fs_sb_info *sbi, struct writeback_control *wbc);
2215
void build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount);
2216 2217 2218 2219 2220
bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid);
void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid);
void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid);
int try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink);
void recover_inline_xattr(struct inode *inode, struct page *page);
2221
int recover_xattr_data(struct inode *inode, struct page *page,
2222 2223 2224 2225
			block_t blkaddr);
int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
int restore_node_summary(struct f2fs_sb_info *sbi,
			unsigned int segno, struct f2fs_summary_block *sum);
2226
void flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
2227 2228
int build_node_manager(struct f2fs_sb_info *sbi);
void destroy_node_manager(struct f2fs_sb_info *sbi);
2229
int __init create_node_manager_caches(void);
2230 2231 2232 2233 2234
void destroy_node_manager_caches(void);

/*
 * segment.c
 */
2235 2236
void register_inmem_page(struct inode *inode, struct page *page);
void drop_inmem_pages(struct inode *inode);
2237
void drop_inmem_page(struct inode *inode, struct page *page);
2238 2239 2240 2241 2242 2243 2244 2245 2246
int commit_inmem_pages(struct inode *inode);
void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need);
void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi);
int f2fs_issue_flush(struct f2fs_sb_info *sbi);
int create_flush_cmd_control(struct f2fs_sb_info *sbi);
void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free);
void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr);
bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr);
void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new);
C
Chao Yu 已提交
2247
void f2fs_wait_discard_bios(struct f2fs_sb_info *sbi);
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258
void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc);
void release_discard_addrs(struct f2fs_sb_info *sbi);
int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
void allocate_new_segments(struct f2fs_sb_info *sbi);
int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
bool exist_trim_candidates(struct f2fs_sb_info *sbi, struct cp_control *cpc);
struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno);
void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr);
void write_meta_page(struct f2fs_sb_info *sbi, struct page *page);
void write_node_page(unsigned int nid, struct f2fs_io_info *fio);
void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio);
2259
int rewrite_data_page(struct f2fs_io_info *fio);
2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280
void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
			block_t old_blkaddr, block_t new_blkaddr,
			bool recover_curseg, bool recover_newaddr);
void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
			block_t old_addr, block_t new_addr,
			unsigned char version, bool recover_curseg,
			bool recover_newaddr);
void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
			block_t old_blkaddr, block_t *new_blkaddr,
			struct f2fs_summary *sum, int type);
void f2fs_wait_on_page_writeback(struct page *page,
			enum page_type type, bool ordered);
void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
			block_t blkaddr);
void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
			unsigned int val, int alloc);
void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
int build_segment_manager(struct f2fs_sb_info *sbi);
void destroy_segment_manager(struct f2fs_sb_info *sbi);
2281 2282
int __init create_segment_manager_caches(void);
void destroy_segment_manager_caches(void);
2283 2284 2285 2286

/*
 * checkpoint.c
 */
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312
void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io);
struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index);
bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type);
int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
			int type, bool sync);
void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index);
long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
			long nr_to_write);
void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type);
void release_ino_entry(struct f2fs_sb_info *sbi, bool all);
bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode);
int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi);
int acquire_orphan_inode(struct f2fs_sb_info *sbi);
void release_orphan_inode(struct f2fs_sb_info *sbi);
void add_orphan_inode(struct inode *inode);
void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino);
int recover_orphan_inodes(struct f2fs_sb_info *sbi);
int get_valid_checkpoint(struct f2fs_sb_info *sbi);
void update_dirty_page(struct inode *inode, struct page *page);
void remove_dirty_inode(struct inode *inode);
int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type);
int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc);
void init_ino_entry_info(struct f2fs_sb_info *sbi);
2313
int __init create_checkpoint_caches(void);
2314 2315 2316 2317 2318
void destroy_checkpoint_caches(void);

/*
 * data.c
 */
2319 2320 2321
void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type,
			int rw);
void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi,
2322 2323
				struct inode *inode, nid_t ino, pgoff_t idx,
				enum page_type type, int rw);
2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352
void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi);
int f2fs_submit_page_bio(struct f2fs_io_info *fio);
int f2fs_submit_page_mbio(struct f2fs_io_info *fio);
struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
			block_t blk_addr, struct bio *bio);
int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr);
void set_data_blkaddr(struct dnode_of_data *dn);
void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr);
int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count);
int reserve_new_block(struct dnode_of_data *dn);
int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index);
int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from);
int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index);
struct page *get_read_data_page(struct inode *inode, pgoff_t index,
			int op_flags, bool for_write);
struct page *find_data_page(struct inode *inode, pgoff_t index);
struct page *get_lock_data_page(struct inode *inode, pgoff_t index,
			bool for_write);
struct page *get_new_data_page(struct inode *inode,
			struct page *ipage, pgoff_t index, bool new_i_size);
int do_write_data_page(struct f2fs_io_info *fio);
int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
			int create, int flag);
int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
			u64 start, u64 len);
void f2fs_set_page_dirty_nobuffers(struct page *page);
void f2fs_invalidate_page(struct page *page, unsigned int offset,
			unsigned int length);
int f2fs_release_page(struct page *page, gfp_t wait);
2353
#ifdef CONFIG_MIGRATION
2354 2355
int f2fs_migrate_page(struct address_space *mapping, struct page *newpage,
			struct page *page, enum migrate_mode mode);
2356
#endif
2357 2358 2359 2360

/*
 * gc.c
 */
2361 2362 2363 2364 2365
int start_gc_thread(struct f2fs_sb_info *sbi);
void stop_gc_thread(struct f2fs_sb_info *sbi);
block_t start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background);
void build_gc_manager(struct f2fs_sb_info *sbi);
2366 2367 2368 2369

/*
 * recovery.c
 */
2370 2371
int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only);
bool space_for_roll_forward(struct f2fs_sb_info *sbi);
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381

/*
 * debug.c
 */
#ifdef CONFIG_F2FS_STAT_FS
struct f2fs_stat_info {
	struct list_head stat_list;
	struct f2fs_sb_info *sbi;
	int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
	int main_area_segs, main_area_sections, main_area_zones;
2382 2383
	unsigned long long hit_largest, hit_cached, hit_rbtree;
	unsigned long long hit_total, total_ext;
J
Jaegeuk Kim 已提交
2384
	int ext_tree, zombie_tree, ext_node;
2385 2386
	int ndirty_node, ndirty_dent, ndirty_meta, ndirty_data, ndirty_imeta;
	int inmem_pages;
2387
	unsigned int ndirty_dirs, ndirty_files, ndirty_all;
C
Chao Yu 已提交
2388
	int nats, dirty_nats, sits, dirty_sits, free_nids, alloc_nids;
2389
	int total_count, utilization;
C
Chao Yu 已提交
2390 2391
	int bg_gc, nr_wb_cp_data, nr_wb_data;
	int nr_flushing, nr_flushed, nr_discarding, nr_discarded;
C
Chao Yu 已提交
2392
	int nr_discard_cmd;
2393
	int inline_xattr, inline_inode, inline_dir, append, update, orphans;
2394
	int aw_cnt, max_aw_cnt, vw_cnt, max_vw_cnt;
2395
	unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;
2396 2397 2398 2399
	unsigned int bimodal, avg_vblocks;
	int util_free, util_valid, util_invalid;
	int rsvd_segs, overp_segs;
	int dirty_count, node_pages, meta_pages;
2400
	int prefree_count, call_count, cp_count, bg_cp_count;
2401
	int tot_segs, node_segs, data_segs, free_segs, free_secs;
2402
	int bg_node_segs, bg_data_segs;
2403
	int tot_blks, data_blks, node_blks;
2404
	int bg_data_blks, bg_node_blks;
2405 2406 2407 2408 2409 2410
	int curseg[NR_CURSEG_TYPE];
	int cursec[NR_CURSEG_TYPE];
	int curzone[NR_CURSEG_TYPE];

	unsigned int segment_count[2];
	unsigned int block_count[2];
2411
	unsigned int inplace_count;
C
Chao Yu 已提交
2412
	unsigned long long base_mem, cache_mem, page_mem;
2413 2414
};

2415 2416
static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
{
C
Chris Fries 已提交
2417
	return (struct f2fs_stat_info *)sbi->stat_info;
2418 2419
}

2420
#define stat_inc_cp_count(si)		((si)->cp_count++)
2421
#define stat_inc_bg_cp_count(si)	((si)->bg_cp_count++)
2422 2423
#define stat_inc_call_count(si)		((si)->call_count++)
#define stat_inc_bggc_count(sbi)	((sbi)->bg_gc++)
C
Chao Yu 已提交
2424 2425
#define stat_inc_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]++)
#define stat_dec_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]--)
2426 2427 2428 2429
#define stat_inc_total_hit(sbi)		(atomic64_inc(&(sbi)->total_hit_ext))
#define stat_inc_rbtree_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_rbtree))
#define stat_inc_largest_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_largest))
#define stat_inc_cached_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_cached))
C
Chao Yu 已提交
2430 2431 2432 2433 2434 2435 2436 2437 2438 2439
#define stat_inc_inline_xattr(inode)					\
	do {								\
		if (f2fs_has_inline_xattr(inode))			\
			(atomic_inc(&F2FS_I_SB(inode)->inline_xattr));	\
	} while (0)
#define stat_dec_inline_xattr(inode)					\
	do {								\
		if (f2fs_has_inline_xattr(inode))			\
			(atomic_dec(&F2FS_I_SB(inode)->inline_xattr));	\
	} while (0)
2440 2441 2442
#define stat_inc_inline_inode(inode)					\
	do {								\
		if (f2fs_has_inline_data(inode))			\
2443
			(atomic_inc(&F2FS_I_SB(inode)->inline_inode));	\
2444 2445 2446 2447
	} while (0)
#define stat_dec_inline_inode(inode)					\
	do {								\
		if (f2fs_has_inline_data(inode))			\
2448
			(atomic_dec(&F2FS_I_SB(inode)->inline_inode));	\
2449
	} while (0)
2450 2451 2452
#define stat_inc_inline_dir(inode)					\
	do {								\
		if (f2fs_has_inline_dentry(inode))			\
2453
			(atomic_inc(&F2FS_I_SB(inode)->inline_dir));	\
2454 2455 2456 2457
	} while (0)
#define stat_dec_inline_dir(inode)					\
	do {								\
		if (f2fs_has_inline_dentry(inode))			\
2458
			(atomic_dec(&F2FS_I_SB(inode)->inline_dir));	\
2459
	} while (0)
2460 2461 2462 2463
#define stat_inc_seg_type(sbi, curseg)					\
		((sbi)->segment_count[(curseg)->alloc_type]++)
#define stat_inc_block_count(sbi, curseg)				\
		((sbi)->block_count[(curseg)->alloc_type]++)
2464 2465
#define stat_inc_inplace_blocks(sbi)					\
		(atomic_inc(&(sbi)->inplace_count))
2466
#define stat_inc_atomic_write(inode)					\
2467
		(atomic_inc(&F2FS_I_SB(inode)->aw_cnt))
2468
#define stat_dec_atomic_write(inode)					\
2469
		(atomic_dec(&F2FS_I_SB(inode)->aw_cnt))
2470 2471 2472 2473 2474 2475 2476
#define stat_update_max_atomic_write(inode)				\
	do {								\
		int cur = atomic_read(&F2FS_I_SB(inode)->aw_cnt);	\
		int max = atomic_read(&F2FS_I_SB(inode)->max_aw_cnt);	\
		if (cur > max)						\
			atomic_set(&F2FS_I_SB(inode)->max_aw_cnt, cur);	\
	} while (0)
2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487
#define stat_inc_volatile_write(inode)					\
		(atomic_inc(&F2FS_I_SB(inode)->vw_cnt))
#define stat_dec_volatile_write(inode)					\
		(atomic_dec(&F2FS_I_SB(inode)->vw_cnt))
#define stat_update_max_volatile_write(inode)				\
	do {								\
		int cur = atomic_read(&F2FS_I_SB(inode)->vw_cnt);	\
		int max = atomic_read(&F2FS_I_SB(inode)->max_vw_cnt);	\
		if (cur > max)						\
			atomic_set(&F2FS_I_SB(inode)->max_vw_cnt, cur);	\
	} while (0)
2488
#define stat_inc_seg_count(sbi, type, gc_type)				\
2489
	do {								\
2490
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
2491 2492
		si->tot_segs++;						\
		if ((type) == SUM_TYPE_DATA) {				\
2493
			si->data_segs++;				\
2494 2495
			si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0;	\
		} else {						\
2496
			si->node_segs++;				\
2497 2498
			si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0;	\
		}							\
2499 2500 2501
	} while (0)

#define stat_inc_tot_blk_count(si, blks)				\
2502
	((si)->tot_blks += (blks))
2503

2504
#define stat_inc_data_blk_count(sbi, blks, gc_type)			\
2505
	do {								\
2506
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
2507 2508
		stat_inc_tot_blk_count(si, blks);			\
		si->data_blks += (blks);				\
2509
		si->bg_data_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
2510 2511
	} while (0)

2512
#define stat_inc_node_blk_count(sbi, blks, gc_type)			\
2513
	do {								\
2514
		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
2515 2516
		stat_inc_tot_blk_count(si, blks);			\
		si->node_blks += (blks);				\
2517
		si->bg_node_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
2518 2519
	} while (0)

2520 2521
int f2fs_build_stats(struct f2fs_sb_info *sbi);
void f2fs_destroy_stats(struct f2fs_sb_info *sbi);
2522
int __init f2fs_create_root_stats(void);
2523
void f2fs_destroy_root_stats(void);
2524
#else
2525
#define stat_inc_cp_count(si)
2526
#define stat_inc_bg_cp_count(si)
2527
#define stat_inc_call_count(si)
2528
#define stat_inc_bggc_count(si)
C
Chao Yu 已提交
2529 2530
#define stat_inc_dirty_inode(sbi, type)
#define stat_dec_dirty_inode(sbi, type)
2531
#define stat_inc_total_hit(sb)
2532
#define stat_inc_rbtree_node_hit(sb)
2533 2534
#define stat_inc_largest_node_hit(sbi)
#define stat_inc_cached_node_hit(sbi)
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#define stat_inc_inline_xattr(inode)
#define stat_dec_inline_xattr(inode)
2537 2538
#define stat_inc_inline_inode(inode)
#define stat_dec_inline_inode(inode)
2539 2540
#define stat_inc_inline_dir(inode)
#define stat_dec_inline_dir(inode)
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#define stat_inc_atomic_write(inode)
#define stat_dec_atomic_write(inode)
#define stat_update_max_atomic_write(inode)
2544 2545 2546
#define stat_inc_volatile_write(inode)
#define stat_dec_volatile_write(inode)
#define stat_update_max_volatile_write(inode)
2547 2548
#define stat_inc_seg_type(sbi, curseg)
#define stat_inc_block_count(sbi, curseg)
2549
#define stat_inc_inplace_blocks(sbi)
2550
#define stat_inc_seg_count(sbi, type, gc_type)
2551
#define stat_inc_tot_blk_count(si, blks)
2552 2553
#define stat_inc_data_blk_count(sbi, blks, gc_type)
#define stat_inc_node_blk_count(sbi, blks, gc_type)
2554 2555 2556

static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
2557
static inline int __init f2fs_create_root_stats(void) { return 0; }
2558
static inline void f2fs_destroy_root_stats(void) { }
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#endif

extern const struct file_operations f2fs_dir_operations;
extern const struct file_operations f2fs_file_operations;
extern const struct inode_operations f2fs_file_inode_operations;
extern const struct address_space_operations f2fs_dblock_aops;
extern const struct address_space_operations f2fs_node_aops;
extern const struct address_space_operations f2fs_meta_aops;
extern const struct inode_operations f2fs_dir_inode_operations;
extern const struct inode_operations f2fs_symlink_inode_operations;
2569
extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
2570
extern const struct inode_operations f2fs_special_inode_operations;
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extern struct kmem_cache *inode_entry_slab;
2572

2573 2574 2575
/*
 * inline.c
 */
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bool f2fs_may_inline_data(struct inode *inode);
bool f2fs_may_inline_dentry(struct inode *inode);
void read_inline_data(struct page *page, struct page *ipage);
2579
void truncate_inline_inode(struct inode *inode, struct page *ipage, u64 from);
2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599
int f2fs_read_inline_data(struct inode *inode, struct page *page);
int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page);
int f2fs_convert_inline_inode(struct inode *inode);
int f2fs_write_inline_data(struct inode *inode, struct page *page);
bool recover_inline_data(struct inode *inode, struct page *npage);
struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
			struct fscrypt_name *fname, struct page **res_page);
int make_empty_inline_dir(struct inode *inode, struct inode *parent,
			struct page *ipage);
int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
			const struct qstr *orig_name,
			struct inode *inode, nid_t ino, umode_t mode);
void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
			struct inode *dir, struct inode *inode);
bool f2fs_empty_inline_dir(struct inode *dir);
int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
			struct fscrypt_str *fstr);
int f2fs_inline_data_fiemap(struct inode *inode,
			struct fiemap_extent_info *fieinfo,
			__u64 start, __u64 len);
2600

2601 2602 2603
/*
 * shrinker.c
 */
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unsigned long f2fs_shrink_count(struct shrinker *shrink,
			struct shrink_control *sc);
unsigned long f2fs_shrink_scan(struct shrinker *shrink,
			struct shrink_control *sc);
void f2fs_join_shrinker(struct f2fs_sb_info *sbi);
void f2fs_leave_shrinker(struct f2fs_sb_info *sbi);
2610

2611 2612 2613
/*
 * extent_cache.c
 */
2614 2615 2616 2617 2618 2619 2620 2621 2622 2623
struct rb_entry *__lookup_rb_tree(struct rb_root *root,
				struct rb_entry *cached_re, unsigned int ofs);
struct rb_node **__lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi,
				struct rb_root *root, struct rb_node **parent,
				unsigned int ofs);
struct rb_entry *__lookup_rb_tree_ret(struct rb_root *root,
		struct rb_entry *cached_re, unsigned int ofs,
		struct rb_entry **prev_entry, struct rb_entry **next_entry,
		struct rb_node ***insert_p, struct rb_node **insert_parent,
		bool force);
2624 2625
bool __check_rb_tree_consistence(struct f2fs_sb_info *sbi,
						struct rb_root *root);
2626 2627 2628 2629 2630 2631 2632 2633
unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink);
bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext);
void f2fs_drop_extent_tree(struct inode *inode);
unsigned int f2fs_destroy_extent_node(struct inode *inode);
void f2fs_destroy_extent_tree(struct inode *inode);
bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs,
			struct extent_info *ei);
void f2fs_update_extent_cache(struct dnode_of_data *dn);
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Chao Yu 已提交
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void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
2635 2636
			pgoff_t fofs, block_t blkaddr, unsigned int len);
void init_extent_cache_info(struct f2fs_sb_info *sbi);
2637 2638 2639
int __init create_extent_cache(void);
void destroy_extent_cache(void);

2640 2641 2642
/*
 * crypto support
 */
2643
static inline bool f2fs_encrypted_inode(struct inode *inode)
2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656
{
	return file_is_encrypt(inode);
}

static inline void f2fs_set_encrypted_inode(struct inode *inode)
{
#ifdef CONFIG_F2FS_FS_ENCRYPTION
	file_set_encrypt(inode);
#endif
}

static inline bool f2fs_bio_encrypted(struct bio *bio)
{
2657
	return bio->bi_private != NULL;
2658 2659 2660 2661 2662 2663
}

static inline int f2fs_sb_has_crypto(struct super_block *sb)
{
	return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT);
}
2664

2665
static inline int f2fs_sb_mounted_blkzoned(struct super_block *sb)
2666
{
2667
	return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_BLKZONED);
2668 2669
}

2670 2671
#ifdef CONFIG_BLK_DEV_ZONED
static inline int get_blkz_type(struct f2fs_sb_info *sbi,
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			struct block_device *bdev, block_t blkaddr)
2673 2674
{
	unsigned int zno = blkaddr >> sbi->log_blocks_per_blkz;
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	int i;
2676

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	for (i = 0; i < sbi->s_ndevs; i++)
		if (FDEV(i).bdev == bdev)
			return FDEV(i).blkz_type[zno];
	return -EINVAL;
2681 2682 2683
}
#endif

2684
static inline bool f2fs_discard_en(struct f2fs_sb_info *sbi)
2685
{
2686 2687 2688
	struct request_queue *q = bdev_get_queue(sbi->sb->s_bdev);

	return blk_queue_discard(q) || f2fs_sb_mounted_blkzoned(sbi->sb);
2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705
}

static inline void set_opt_mode(struct f2fs_sb_info *sbi, unsigned int mt)
{
	clear_opt(sbi, ADAPTIVE);
	clear_opt(sbi, LFS);

	switch (mt) {
	case F2FS_MOUNT_ADAPTIVE:
		set_opt(sbi, ADAPTIVE);
		break;
	case F2FS_MOUNT_LFS:
		set_opt(sbi, LFS);
		break;
	}
}

2706 2707 2708
static inline bool f2fs_may_encrypt(struct inode *inode)
{
#ifdef CONFIG_F2FS_FS_ENCRYPTION
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	umode_t mode = inode->i_mode;
2710 2711 2712 2713 2714 2715 2716

	return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
#else
	return 0;
#endif
}

2717
#endif