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linux/fs/f2fs/f2fs.h
Chao Yu 0f34802858 f2fs: support checkpoint error injection 
This patch adds to support checkpoint error injection in f2fs for testing
fatal error tolerance, it will be useful that it can simulate abnormal
power off by f2fs itself instead of calling godown ioctl by running apps.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-30 17:34:35 -07:00

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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>
#include <linux/kobject.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/fscrypto.h>
#include <crypto/hash.h>
#ifdef CONFIG_F2FS_CHECK_FS
#define f2fs_bug_on(sbi, condition) BUG_ON(condition)
#else
#define f2fs_bug_on(sbi, condition) \
do { \
if (unlikely(condition)) { \
WARN_ON(1); \
set_sbi_flag(sbi, SBI_NEED_FSCK); \
} \
} while (0)
#endif
#ifdef CONFIG_F2FS_FAULT_INJECTION
enum {
FAULT_KMALLOC,
FAULT_PAGE_ALLOC,
FAULT_ALLOC_NID,
FAULT_ORPHAN,
FAULT_BLOCK,
FAULT_DIR_DEPTH,
FAULT_EVICT_INODE,
FAULT_IO,
FAULT_CHECKPOINT,
FAULT_MAX,
};
struct f2fs_fault_info {
atomic_t inject_ops;
unsigned int inject_rate;
unsigned int inject_type;
};
extern char *fault_name[FAULT_MAX];
#define IS_FAULT_SET(fi, type) (fi->inject_type & (1 << (type)))
#endif
/*
* 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
#define F2FS_MOUNT_INLINE_XATTR 0x00000080
#define F2FS_MOUNT_INLINE_DATA 0x00000100
#define F2FS_MOUNT_INLINE_DENTRY 0x00000200
#define F2FS_MOUNT_FLUSH_MERGE 0x00000400
#define F2FS_MOUNT_NOBARRIER 0x00000800
#define F2FS_MOUNT_FASTBOOT 0x00001000
#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
#define F2FS_MOUNT_DATA_FLUSH 0x00008000
#define F2FS_MOUNT_FAULT_INJECTION 0x00010000
#define F2FS_MOUNT_ADAPTIVE 0x00020000
#define F2FS_MOUNT_LFS 0x00040000
#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)
#define ver_after(a, b) (typecheck(unsigned long long, a) && \
typecheck(unsigned long long, b) && \
((long long)((a) - (b)) > 0))
typedef u32 block_t; /*
* should not change u32, since it is the on-disk block
* address format, __le32.
*/
typedef u32 nid_t;
struct f2fs_mount_info {
unsigned int opt;
};
#define F2FS_FEATURE_ENCRYPT 0x0001
#define F2FS_FEATURE_HMSMR 0x0002
#define F2FS_HAS_FEATURE(sb, mask) \
((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0)
#define F2FS_SET_FEATURE(sb, mask) \
F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask)
#define F2FS_CLEAR_FEATURE(sb, mask) \
F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask)
/*
* For checkpoint manager
*/
enum {
NAT_BITMAP,
SIT_BITMAP
};
enum {
CP_UMOUNT,
CP_FASTBOOT,
CP_SYNC,
CP_RECOVERY,
CP_DISCARD,
};
#define DEF_BATCHED_TRIM_SECTIONS 2
#define BATCHED_TRIM_SEGMENTS(sbi) \
(SM_I(sbi)->trim_sections * (sbi)->segs_per_sec)
#define BATCHED_TRIM_BLOCKS(sbi) \
(BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg)
#define DEF_CP_INTERVAL 60 /* 60 secs */
#define DEF_IDLE_INTERVAL 5 /* 5 secs */
struct cp_control {
int reason;
__u64 trim_start;
__u64 trim_end;
__u64 trim_minlen;
__u64 trimmed;
};
/*
* For CP/NAT/SIT/SSA readahead
*/
enum {
META_CP,
META_NAT,
META_SIT,
META_SSA,
META_POR,
};
/* for the list of ino */
enum {
ORPHAN_INO, /* for orphan ino list */
APPEND_INO, /* for append ino list */
UPDATE_INO, /* for update ino list */
MAX_INO_ENTRY, /* max. list */
};
struct ino_entry {
struct list_head list; /* list head */
nid_t ino; /* inode number */
};
/* for the list of inodes to be GCed */
struct inode_entry {
struct list_head list; /* list head */
struct inode *inode; /* vfs inode pointer */
};
/* for the list of blockaddresses to be discarded */
struct discard_entry {
struct list_head list; /* list head */
block_t blkaddr; /* block address to be discarded */
int len; /* # of consecutive blocks of the discard */
};
struct bio_entry {
struct list_head list;
struct bio *bio;
struct completion event;
int error;
};
/* 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 */
block_t blkaddr; /* block address locating the last fsync */
block_t last_dentry; /* block address locating the last dentry */
};
#define nats_in_cursum(jnl) (le16_to_cpu(jnl->n_nats))
#define sits_in_cursum(jnl) (le16_to_cpu(jnl->n_sits))
#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)
#define MAX_NAT_JENTRIES(jnl) (NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
#define MAX_SIT_JENTRIES(jnl) (SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
{
int before = nats_in_cursum(journal);
journal->n_nats = cpu_to_le16(before + i);
return before;
}
static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
{
int before = sits_in_cursum(journal);
journal->n_sits = cpu_to_le16(before + i);
return before;
}
static inline bool __has_cursum_space(struct f2fs_journal *journal,
int size, int type)
{
if (type == NAT_JOURNAL)
return size <= MAX_NAT_JENTRIES(journal);
return size <= MAX_SIT_JENTRIES(journal);
}
/*
* ioctl commands
*/
#define F2FS_IOC_GETFLAGS FS_IOC_GETFLAGS
#define F2FS_IOC_SETFLAGS FS_IOC_SETFLAGS
#define F2FS_IOC_GETVERSION FS_IOC_GETVERSION
#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)
#define F2FS_IOC_START_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 3)
#define F2FS_IOC_RELEASE_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 4)
#define F2FS_IOC_ABORT_VOLATILE_WRITE _IO(F2FS_IOCTL_MAGIC, 5)
#define F2FS_IOC_GARBAGE_COLLECT _IO(F2FS_IOCTL_MAGIC, 6)
#define F2FS_IOC_WRITE_CHECKPOINT _IO(F2FS_IOCTL_MAGIC, 7)
#define F2FS_IOC_DEFRAGMENT _IO(F2FS_IOCTL_MAGIC, 8)
#define F2FS_IOC_MOVE_RANGE _IOWR(F2FS_IOCTL_MAGIC, 9, \
struct f2fs_move_range)
#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
/*
* 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 */
#define F2FS_GOING_DOWN_METAFLUSH 0x3 /* going down with meta flush */
#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
/*
* ioctl commands in 32 bit emulation
*/
#define F2FS_IOC32_GETFLAGS FS_IOC32_GETFLAGS
#define F2FS_IOC32_SETFLAGS FS_IOC32_SETFLAGS
#define F2FS_IOC32_GETVERSION FS_IOC32_GETVERSION
#endif
struct f2fs_defragment {
u64 start;
u64 len;
};
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 */
};
/*
* For INODE and NODE manager
*/
/* for directory operations */
struct f2fs_dentry_ptr {
struct inode *inode;
const void *bitmap;
struct f2fs_dir_entry *dentry;
__u8 (*filename)[F2FS_SLOT_LEN];
int max;
};
static inline void make_dentry_ptr(struct inode *inode,
struct f2fs_dentry_ptr *d, void *src, int type)
{
d->inode = inode;
if (type == 1) {
struct f2fs_dentry_block *t = (struct f2fs_dentry_block *)src;
d->max = NR_DENTRY_IN_BLOCK;
d->bitmap = &t->dentry_bitmap;
d->dentry = t->dentry;
d->filename = t->filename;
} else {
struct f2fs_inline_dentry *t = (struct f2fs_inline_dentry *)src;
d->max = NR_INLINE_DENTRY;
d->bitmap = &t->dentry_bitmap;
d->dentry = t->dentry;
d->filename = t->filename;
}
}
/*
* 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)
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
* by get_data_block.
*/
};
#define F2FS_LINK_MAX 0xffffffff /* maximum link count per file */
#define MAX_DIR_RA_PAGES 4 /* maximum ra pages of dir */
/* vector size for gang look-up from extent cache that consists of radix tree */
#define EXT_TREE_VEC_SIZE 64
/* for in-memory extent cache entry */
#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
struct extent_info {
unsigned int fofs; /* start offset in a file */
u32 blk; /* start block address of the extent */
unsigned int len; /* length of the extent */
};
struct extent_node {
struct rb_node rb_node; /* rb node located in rb-tree */
struct list_head list; /* node in global extent list of sbi */
struct extent_info ei; /* extent info */
struct extent_tree *et; /* extent tree pointer */
};
struct extent_tree {
nid_t ino; /* inode number */
struct rb_root root; /* root of extent info rb-tree */
struct extent_node *cached_en; /* recently accessed extent node */
struct extent_info largest; /* largested extent info */
struct list_head list; /* to be used by sbi->zombie_list */
rwlock_t lock; /* protect extent info rb-tree */
atomic_t node_cnt; /* # of extent node in rb-tree*/
};
/*
* 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)
#define F2FS_MAP_UNWRITTEN (1 << BH_Unwritten)
#define F2FS_MAP_FLAGS (F2FS_MAP_NEW | F2FS_MAP_MAPPED |\
F2FS_MAP_UNWRITTEN)
struct f2fs_map_blocks {
block_t m_pblk;
block_t m_lblk;
unsigned int m_len;
unsigned int m_flags;
pgoff_t *m_next_pgofs; /* point next possible non-hole pgofs */
};
/* 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
#define F2FS_GET_BLOCK_PRE_DIO 4
#define F2FS_GET_BLOCK_PRE_AIO 5
/*
* i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
*/
#define FADVISE_COLD_BIT 0x01
#define FADVISE_LOST_PINO_BIT 0x02
#define FADVISE_ENCRYPT_BIT 0x04
#define FADVISE_ENC_NAME_BIT 0x08
#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)
#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)
#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)
#define DEF_DIR_LEVEL 0
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 */
unsigned char i_dir_level; /* use for dentry level for large dir */
unsigned int i_current_depth; /* use only in directory structure */
unsigned int i_pino; /* parent inode number */
umode_t i_acl_mode; /* keep file acl mode temporarily */
/* Use below internally in f2fs*/
unsigned long flags; /* use to pass per-file flags */
struct rw_semaphore i_sem; /* protect fi info */
struct percpu_counter dirty_pages; /* # of dirty pages */
f2fs_hash_t chash; /* hash value of given file name */
unsigned int clevel; /* maximum level of given file name */
nid_t i_xattr_nid; /* node id that contains xattrs */
unsigned long long xattr_ver; /* cp version of xattr modification */
loff_t last_disk_size; /* lastly written file size */
struct list_head dirty_list; /* dirty list for dirs and files */
struct list_head gdirty_list; /* linked in global dirty list */
struct list_head inmem_pages; /* inmemory pages managed by f2fs */
struct mutex inmem_lock; /* lock for inmemory pages */
struct extent_tree *extent_tree; /* cached extent_tree entry */
struct rw_semaphore dio_rwsem[2];/* avoid racing between dio and gc */
};
static inline void get_extent_info(struct extent_info *ext,
struct f2fs_extent *i_ext)
{
ext->fofs = le32_to_cpu(i_ext->fofs);
ext->blk = le32_to_cpu(i_ext->blk);
ext->len = le32_to_cpu(i_ext->len);
}
static inline void set_raw_extent(struct extent_info *ext,
struct f2fs_extent *i_ext)
{
i_ext->fofs = cpu_to_le32(ext->fofs);
i_ext->blk = cpu_to_le32(ext->blk);
i_ext->len = cpu_to_le32(ext->len);
}
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;
}
static inline bool __is_extent_same(struct extent_info *ei1,
struct extent_info *ei2)
{
return (ei1->fofs == ei2->fofs && ei1->blk == ei2->blk &&
ei1->len == ei2->len);
}
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);
}
extern void f2fs_mark_inode_dirty_sync(struct inode *);
static inline void __try_update_largest_extent(struct inode *inode,
struct extent_tree *et, struct extent_node *en)
{
if (en->ei.len > et->largest.len) {
et->largest = en->ei;
f2fs_mark_inode_dirty_sync(inode);
}
}
struct f2fs_nm_info {
block_t nat_blkaddr; /* base disk address of NAT */
nid_t max_nid; /* maximum possible node ids */
nid_t available_nids; /* maximum available node ids */
nid_t next_scan_nid; /* the next nid to be scanned */
unsigned int ram_thresh; /* control the memory footprint */
unsigned int ra_nid_pages; /* # of nid pages to be readaheaded */
unsigned int dirty_nats_ratio; /* control dirty nats ratio threshold */
/* NAT cache management */
struct radix_tree_root nat_root;/* root of the nat entry cache */
struct radix_tree_root nat_set_root;/* root of the nat set cache */
struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
struct list_head nat_entries; /* cached nat entry list (clean) */
unsigned int nat_cnt; /* the # of cached nat entries */
unsigned int dirty_nat_cnt; /* total num of nat entries in set */
/* free node ids management */
struct radix_tree_root free_nid_root;/* root of the free_nid cache */
struct list_head free_nid_list; /* a list for free nids */
spinlock_t free_nid_list_lock; /* protect free nid list */
unsigned int fcnt; /* the number of free node id */
struct mutex build_lock; /* lock for build free nids */
/* for checkpoint */
char *nat_bitmap; /* NAT bitmap pointer */
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 */
bool node_changed; /* is node block changed */
char cur_level; /* level of hole node page */
char max_level; /* level of current page located */
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)
{
memset(dn, 0, sizeof(*dn));
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 */
NO_CHECK_TYPE,
CURSEG_DIRECT_IO, /* to use for the direct IO path */
};
struct flush_cmd {
struct completion wait;
struct llist_node llnode;
int ret;
};
struct flush_cmd_control {
struct task_struct *f2fs_issue_flush; /* flush thread */
wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
atomic_t submit_flush; /* # of issued flushes */
struct llist_head issue_list; /* list for command issue */
struct llist_node *dispatch_list; /* list for command dispatch */
};
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 */
/* a threshold to reclaim prefree segments */
unsigned int rec_prefree_segments;
/* for small discard management */
struct list_head discard_list; /* 4KB discard list */
struct list_head wait_list; /* linked with issued discard bio */
int nr_discards; /* # of discards in the list */
int max_discards; /* max. discards to be issued */
/* for batched trimming */
unsigned int trim_sections; /* # of sections to trim */
struct list_head sit_entry_set; /* sit entry set list */
unsigned int ipu_policy; /* in-place-update policy */
unsigned int min_ipu_util; /* in-place-update threshold */
unsigned int min_fsync_blocks; /* threshold for fsync */
/* for flush command control */
struct flush_cmd_control *cmd_control_info;
};
/*
* 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.
*/
enum count_type {
F2FS_DIRTY_DENTS,
F2FS_DIRTY_DATA,
F2FS_DIRTY_NODES,
F2FS_DIRTY_META,
F2FS_INMEM_PAGES,
F2FS_DIRTY_IMETA,
NR_COUNT_TYPE,
};
/*
* The below are the page types of bios used in submit_bio().
* 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.
*/
#define PAGE_TYPE_OF_BIO(type) ((type) > META ? META : (type))
enum page_type {
DATA,
NODE,
META,
NR_PAGE_TYPE,
META_FLUSH,
INMEM, /* the below types are used by tracepoints only. */
INMEM_DROP,
INMEM_REVOKE,
IPU,
OPU,
};
struct f2fs_io_info {
struct f2fs_sb_info *sbi; /* f2fs_sb_info pointer */
enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
int op; /* contains REQ_OP_ */
int op_flags; /* rq_flag_bits */
block_t new_blkaddr; /* new block address to be written */
block_t old_blkaddr; /* old block address before Cow */
struct page *page; /* page to be written */
struct page *encrypted_page; /* encrypted page */
};
#define is_read_io(rw) (rw == READ)
struct f2fs_bio_info {
struct f2fs_sb_info *sbi; /* f2fs superblock */
struct bio *bio; /* bios to merge */
sector_t last_block_in_bio; /* last block number */
struct f2fs_io_info fio; /* store buffered io info. */
struct rw_semaphore io_rwsem; /* blocking op for bio */
};
enum inode_type {
DIR_INODE, /* for dirty dir inode */
FILE_INODE, /* for dirty regular/symlink inode */
DIRTY_META, /* for all dirtied inode metadata */
NR_INODE_TYPE,
};
/* 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 */
};
/* 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 */
SBI_NEED_SB_WRITE, /* need to recover superblock */
SBI_NEED_CP, /* need to checkpoint */
};
enum {
CP_TIME,
REQ_TIME,
MAX_TIME,
};
#ifdef CONFIG_F2FS_FS_ENCRYPTION
#define F2FS_KEY_DESC_PREFIX "f2fs:"
#define F2FS_KEY_DESC_PREFIX_SIZE 5
#endif
struct f2fs_sb_info {
struct super_block *sb; /* pointer to VFS super block */
struct proc_dir_entry *s_proc; /* proc entry */
struct f2fs_super_block *raw_super; /* raw super block pointer */
int valid_super_block; /* valid super block no */
unsigned long s_flag; /* flags for sbi */
#ifdef CONFIG_F2FS_FS_ENCRYPTION
u8 key_prefix[F2FS_KEY_DESC_PREFIX_SIZE];
u8 key_prefix_size;
#endif
/* 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 */
/* for bio operations */
struct f2fs_bio_info read_io; /* for read bios */
struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */
struct mutex wio_mutex[NODE + 1]; /* bio ordering for NODE/DATA */
/* for checkpoint */
struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
spinlock_t cp_lock; /* for flag in ckpt */
struct inode *meta_inode; /* cache meta blocks */
struct mutex cp_mutex; /* checkpoint procedure lock */
struct rw_semaphore cp_rwsem; /* blocking FS operations */
struct rw_semaphore node_write; /* locking node writes */
wait_queue_head_t cp_wait;
unsigned long last_time[MAX_TIME]; /* to store time in jiffies */
long interval_time[MAX_TIME]; /* to store thresholds */
struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
/* for orphan inode, use 0'th array */
unsigned int max_orphans; /* max orphan inodes */
/* 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 */
/* for extent tree cache */
struct radix_tree_root extent_tree_root;/* cache extent cache entries */
struct rw_semaphore extent_tree_lock; /* locking extent radix tree */
struct list_head extent_list; /* lru list for shrinker */
spinlock_t extent_lock; /* locking extent lru list */
atomic_t total_ext_tree; /* extent tree count */
struct list_head zombie_list; /* extent zombie tree list */
atomic_t total_zombie_tree; /* extent zombie tree count */
atomic_t total_ext_node; /* extent info count */
/* basic filesystem units */
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 */
loff_t max_file_blocks; /* max block index of file */
int active_logs; /* # of active logs */
int dir_level; /* directory level */
block_t user_block_count; /* # of user blocks */
block_t total_valid_block_count; /* # of valid blocks */
block_t discard_blks; /* discard command candidats */
block_t last_valid_block_count; /* for recovery */
u32 s_next_generation; /* for NFS support */
atomic_t nr_wb_bios; /* # of writeback bios */
/* # of pages, see count_type */
struct percpu_counter nr_pages[NR_COUNT_TYPE];
/* # of allocated blocks */
struct percpu_counter alloc_valid_block_count;
/* valid inode count */
struct percpu_counter total_valid_inode_count;
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 */
unsigned int cur_victim_sec; /* current victim section num */
/* maximum # of trials to find a victim segment for SSR and GC */
unsigned int max_victim_search;
/*
* for stat information.
* one is for the LFS mode, and the other is for the SSR mode.
*/
#ifdef CONFIG_F2FS_STAT_FS
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 */
atomic_t inplace_count; /* # of inplace update */
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 */
atomic_t inline_xattr; /* # of inline_xattr inodes */
atomic_t inline_inode; /* # of inline_data inodes */
atomic_t inline_dir; /* # of inline_dentry inodes */
int bg_gc; /* background gc calls */
unsigned int ndirty_inode[NR_INODE_TYPE]; /* # of dirty inodes */
#endif
unsigned int last_victim[2]; /* last victim segment # */
spinlock_t stat_lock; /* lock for stat operations */
/* For sysfs suppport */
struct kobject s_kobj;
struct completion s_kobj_unregister;
/* For shrinker support */
struct list_head s_list;
struct mutex umount_mutex;
unsigned int shrinker_run_no;
/* For write statistics */
u64 sectors_written_start;
u64 kbytes_written;
/* Reference to checksum algorithm driver via cryptoapi */
struct crypto_shash *s_chksum_driver;
/* For fault injection */
#ifdef CONFIG_F2FS_FAULT_INJECTION
struct f2fs_fault_info fault_info;
#endif
};
#ifdef CONFIG_F2FS_FAULT_INJECTION
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);
printk("%sF2FS-fs : inject %s in %pF\n",
KERN_INFO,
fault_name[type],
__builtin_return_address(0));
return true;
}
return false;
}
#endif
/* 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) \
(((u64)part_stat_read(s->sb->s_bdev->bd_part, sectors[1]) - \
s->sectors_written_start) >> 1)
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);
}
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);
}
/*
* Inline functions
*/
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;
}
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;
}
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);
}
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);
}
static inline struct f2fs_node *F2FS_NODE(struct page *page)
{
return (struct f2fs_node *)page_address(page);
}
static inline struct f2fs_inode *F2FS_INODE(struct page *page)
{
return &((struct f2fs_node *)page_address(page))->i;
}
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);
}
static inline struct address_space *META_MAPPING(struct f2fs_sb_info *sbi)
{
return sbi->meta_inode->i_mapping;
}
static inline struct address_space *NODE_MAPPING(struct f2fs_sb_info *sbi)
{
return sbi->node_inode->i_mapping;
}
static inline bool is_sbi_flag_set(struct f2fs_sb_info *sbi, unsigned int type)
{
return test_bit(type, &sbi->s_flag);
}
static inline void set_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
{
set_bit(type, &sbi->s_flag);
}
static inline void clear_sbi_flag(struct f2fs_sb_info *sbi, unsigned int type)
{
clear_bit(type, &sbi->s_flag);
}
static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
{
return le64_to_cpu(cp->checkpoint_ver);
}
static inline bool __is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
return ckpt_flags & f;
}
static inline bool is_set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
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);
ckpt_flags |= f;
cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}
static inline void set_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
{
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);
ckpt_flags &= (~f);
cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}
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);
}
static inline bool f2fs_discard_en(struct f2fs_sb_info *sbi)
{
struct request_queue *q = bdev_get_queue(sbi->sb->s_bdev);
return blk_queue_discard(q);
}
static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
{
down_read(&sbi->cp_rwsem);
}
static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
{
up_read(&sbi->cp_rwsem);
}
static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
{
down_write(&sbi->cp_rwsem);
}
static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
{
up_write(&sbi->cp_rwsem);
}
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)
{
return (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG) ||
is_set_ckpt_flags(sbi, CP_FASTBOOT_FLAG));
}
/*
* Check whether the given nid is within node id range.
*/
static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
{
if (unlikely(nid < F2FS_ROOT_INO(sbi)))
return -EINVAL;
if (unlikely(nid >= NM_I(sbi)->max_nid))
return -EINVAL;
return 0;
}
#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)
return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1;
else
return inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS;
}
static inline bool f2fs_has_xattr_block(unsigned int ofs)
{
return ofs == XATTR_NODE_OFFSET;
}
static inline void f2fs_i_blocks_write(struct inode *, blkcnt_t, bool);
static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
struct inode *inode, blkcnt_t *count)
{
blkcnt_t diff;
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_BLOCK))
return false;
#endif
/*
* 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));
spin_lock(&sbi->stat_lock);
sbi->total_valid_block_count += (block_t)(*count);
if (unlikely(sbi->total_valid_block_count > sbi->user_block_count)) {
diff = sbi->total_valid_block_count - sbi->user_block_count;
*count -= diff;
sbi->total_valid_block_count = sbi->user_block_count;
if (!*count) {
spin_unlock(&sbi->stat_lock);
percpu_counter_sub(&sbi->alloc_valid_block_count, diff);
return false;
}
}
spin_unlock(&sbi->stat_lock);
f2fs_i_blocks_write(inode, *count, true);
return true;
}
static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
struct inode *inode,
blkcnt_t count)
{
spin_lock(&sbi->stat_lock);
f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
f2fs_bug_on(sbi, inode->i_blocks < count);
sbi->total_valid_block_count -= (block_t)count;
spin_unlock(&sbi->stat_lock);
f2fs_i_blocks_write(inode, count, false);
}
static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
{
percpu_counter_inc(&sbi->nr_pages[count_type]);
if (count_type == F2FS_DIRTY_DATA || count_type == F2FS_INMEM_PAGES)
return;
set_sbi_flag(sbi, SBI_IS_DIRTY);
}
static inline void inode_inc_dirty_pages(struct inode *inode)
{
percpu_counter_inc(&F2FS_I(inode)->dirty_pages);
inc_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
}
static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
{
percpu_counter_dec(&sbi->nr_pages[count_type]);
}
static inline void inode_dec_dirty_pages(struct inode *inode)
{
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
!S_ISLNK(inode->i_mode))
return;
percpu_counter_dec(&F2FS_I(inode)->dirty_pages);
dec_page_count(F2FS_I_SB(inode), S_ISDIR(inode->i_mode) ?
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
}
static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
{
return percpu_counter_sum_positive(&sbi->nr_pages[count_type]);
}
static inline s64 get_dirty_pages(struct inode *inode)
{
return percpu_counter_sum_positive(&F2FS_I(inode)->dirty_pages);
}
static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
{
unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
unsigned int segs = (get_pages(sbi, block_type) + pages_per_sec - 1) >>
sbi->log_blocks_per_seg;
return segs / sbi->segs_per_sec;
}
static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
{
return sbi->total_valid_block_count;
}
static inline block_t discard_blocks(struct f2fs_sb_info *sbi)
{
return sbi->discard_blks;
}
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;
}
static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
{
return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
}
static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
int offset;
if (__cp_payload(sbi) > 0) {
if (flag == NAT_BITMAP)
return &ckpt->sit_nat_version_bitmap;
else
return (unsigned char *)ckpt + F2FS_BLKSIZE;
} else {
offset = (flag == NAT_BITMAP) ?
le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
return &ckpt->sit_nat_version_bitmap + offset;
}
}
static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
{
block_t start_addr;
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
unsigned long long ckpt_version = cur_cp_version(ckpt);
start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
/*
* odd numbered checkpoint should at cp segment 0
* and even segment must be at cp segment 1
*/
if (!(ckpt_version & 1))
start_addr += sbi->blocks_per_seg;
return start_addr;
}
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,
struct inode *inode)
{
block_t valid_block_count;
unsigned int valid_node_count;
spin_lock(&sbi->stat_lock);
valid_block_count = sbi->total_valid_block_count + 1;
if (unlikely(valid_block_count > sbi->user_block_count)) {
spin_unlock(&sbi->stat_lock);
return false;
}
valid_node_count = sbi->total_valid_node_count + 1;
if (unlikely(valid_node_count > sbi->total_node_count)) {
spin_unlock(&sbi->stat_lock);
return false;
}
if (inode)
f2fs_i_blocks_write(inode, 1, true);
sbi->total_valid_node_count++;
sbi->total_valid_block_count++;
spin_unlock(&sbi->stat_lock);
percpu_counter_inc(&sbi->alloc_valid_block_count);
return true;
}
static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
struct inode *inode)
{
spin_lock(&sbi->stat_lock);
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);
f2fs_i_blocks_write(inode, 1, false);
sbi->total_valid_node_count--;
sbi->total_valid_block_count--;
spin_unlock(&sbi->stat_lock);
}
static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
{
return sbi->total_valid_node_count;
}
static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
{
percpu_counter_inc(&sbi->total_valid_inode_count);
}
static inline void dec_valid_inode_count(struct f2fs_sb_info *sbi)
{
percpu_counter_dec(&sbi->total_valid_inode_count);
}
static inline s64 valid_inode_count(struct f2fs_sb_info *sbi)
{
return percpu_counter_sum_positive(&sbi->total_valid_inode_count);
}
static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
pgoff_t index, bool for_write)
{
#ifdef CONFIG_F2FS_FAULT_INJECTION
struct page *page = find_lock_page(mapping, index);
if (page)
return page;
if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC))
return NULL;
#endif
if (!for_write)
return grab_cache_page(mapping, index);
return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
}
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);
}
static inline void f2fs_put_page(struct page *page, int unlock)
{
if (!page)
return;
if (unlock) {
f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page));
unlock_page(page);
}
put_page(page);
}
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,
size_t size)
{
return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, NULL);
}
static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
gfp_t flags)
{
void *entry;
entry = kmem_cache_alloc(cachep, flags);
if (!entry)
entry = kmem_cache_alloc(cachep, flags | __GFP_NOFAIL);
return entry;
}
static inline struct bio *f2fs_bio_alloc(int npages)
{
struct bio *bio;
/* No failure on bio allocation */
bio = bio_alloc(GFP_NOIO, npages);
if (!bio)
bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
return bio;
}
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();
}
#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
static inline bool IS_INODE(struct page *page)
{
struct f2fs_node *p = F2FS_NODE(page);
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;
raw_node = F2FS_NODE(node_page);
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;
}
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;
}
static inline int f2fs_test_and_set_bit(unsigned int nr, char *addr)
{
int mask;
int ret;
addr += (nr >> 3);
mask = 1 << (7 - (nr & 0x07));
ret = mask & *addr;
*addr |= mask;
return ret;
}
static inline int f2fs_test_and_clear_bit(unsigned int nr, char *addr)
{
int mask;
int ret;
addr += (nr >> 3);
mask = 1 << (7 - (nr & 0x07));
ret = mask & *addr;
*addr &= ~mask;
return ret;
}
static inline void f2fs_change_bit(unsigned int nr, char *addr)
{
int mask;
addr += (nr >> 3);
mask = 1 << (7 - (nr & 0x07));
*addr ^= mask;
}
/* used for f2fs_inode_info->flags */
enum {
FI_NEW_INODE, /* indicate newly allocated inode */
FI_DIRTY_INODE, /* indicate inode is dirty or not */
FI_AUTO_RECOVER, /* indicate inode is recoverable */
FI_DIRTY_DIR, /* indicate directory has dirty pages */
FI_INC_LINK, /* need to increment i_nlink */
FI_ACL_MODE, /* indicate acl mode */
FI_NO_ALLOC, /* should not allocate any blocks */
FI_FREE_NID, /* free allocated nide */
FI_NO_EXTENT, /* not to use the extent cache */
FI_INLINE_XATTR, /* used for inline xattr */
FI_INLINE_DATA, /* used for inline data*/
FI_INLINE_DENTRY, /* used for inline dentry */
FI_APPEND_WRITE, /* inode has appended data */
FI_UPDATE_WRITE, /* inode has in-place-update data */
FI_NEED_IPU, /* used for ipu per file */
FI_ATOMIC_FILE, /* indicate atomic file */
FI_VOLATILE_FILE, /* indicate volatile file */
FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
FI_DROP_CACHE, /* drop dirty page cache */
FI_DATA_EXIST, /* indicate data exists */
FI_INLINE_DOTS, /* indicate inline dot dentries */
FI_DO_DEFRAG, /* indicate defragment is running */
FI_DIRTY_FILE, /* indicate regular/symlink has dirty pages */
};
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:
f2fs_mark_inode_dirty_sync(inode);
}
}
static inline void set_inode_flag(struct inode *inode, int flag)
{
if (!test_bit(flag, &F2FS_I(inode)->flags))
set_bit(flag, &F2FS_I(inode)->flags);
__mark_inode_dirty_flag(inode, flag, true);
}
static inline int is_inode_flag_set(struct inode *inode, int flag)
{
return test_bit(flag, &F2FS_I(inode)->flags);
}
static inline void clear_inode_flag(struct inode *inode, int flag)
{
if (test_bit(flag, &F2FS_I(inode)->flags))
clear_bit(flag, &F2FS_I(inode)->flags);
__mark_inode_dirty_flag(inode, flag, false);
}
static inline void set_acl_inode(struct inode *inode, umode_t mode)
{
F2FS_I(inode)->i_acl_mode = mode;
set_inode_flag(inode, FI_ACL_MODE);
f2fs_mark_inode_dirty_sync(inode);
}
static inline void f2fs_i_links_write(struct inode *inode, bool inc)
{
if (inc)
inc_nlink(inode);
else
drop_nlink(inode);
f2fs_mark_inode_dirty_sync(inode);
}
static inline void f2fs_i_blocks_write(struct inode *inode,
blkcnt_t diff, bool add)
{
bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);
inode->i_blocks = add ? inode->i_blocks + diff :
inode->i_blocks - diff;
f2fs_mark_inode_dirty_sync(inode);
if (clean || recover)
set_inode_flag(inode, FI_AUTO_RECOVER);
}
static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size)
{
bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE);
bool recover = is_inode_flag_set(inode, FI_AUTO_RECOVER);
if (i_size_read(inode) == i_size)
return;
i_size_write(inode, i_size);
f2fs_mark_inode_dirty_sync(inode);
if (clean || recover)
set_inode_flag(inode, FI_AUTO_RECOVER);
}
static inline bool f2fs_skip_inode_update(struct inode *inode)
{
if (!is_inode_flag_set(inode, FI_AUTO_RECOVER))
return false;
return F2FS_I(inode)->last_disk_size == i_size_read(inode);
}
static inline void f2fs_i_depth_write(struct inode *inode, unsigned int depth)
{
F2FS_I(inode)->i_current_depth = depth;
f2fs_mark_inode_dirty_sync(inode);
}
static inline void f2fs_i_xnid_write(struct inode *inode, nid_t xnid)
{
F2FS_I(inode)->i_xattr_nid = xnid;
f2fs_mark_inode_dirty_sync(inode);
}
static inline void f2fs_i_pino_write(struct inode *inode, nid_t pino)
{
F2FS_I(inode)->i_pino = pino;
f2fs_mark_inode_dirty_sync(inode);
}
static inline void get_inline_info(struct inode *inode, struct f2fs_inode *ri)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
if (ri->i_inline & F2FS_INLINE_XATTR)
set_bit(FI_INLINE_XATTR, &fi->flags);
if (ri->i_inline & F2FS_INLINE_DATA)
set_bit(FI_INLINE_DATA, &fi->flags);
if (ri->i_inline & F2FS_INLINE_DENTRY)
set_bit(FI_INLINE_DENTRY, &fi->flags);
if (ri->i_inline & F2FS_DATA_EXIST)
set_bit(FI_DATA_EXIST, &fi->flags);
if (ri->i_inline & F2FS_INLINE_DOTS)
set_bit(FI_INLINE_DOTS, &fi->flags);
}
static inline void set_raw_inline(struct inode *inode, struct f2fs_inode *ri)
{
ri->i_inline = 0;
if (is_inode_flag_set(inode, FI_INLINE_XATTR))
ri->i_inline |= F2FS_INLINE_XATTR;
if (is_inode_flag_set(inode, FI_INLINE_DATA))
ri->i_inline |= F2FS_INLINE_DATA;
if (is_inode_flag_set(inode, FI_INLINE_DENTRY))
ri->i_inline |= F2FS_INLINE_DENTRY;
if (is_inode_flag_set(inode, FI_DATA_EXIST))
ri->i_inline |= F2FS_DATA_EXIST;
if (is_inode_flag_set(inode, FI_INLINE_DOTS))
ri->i_inline |= F2FS_INLINE_DOTS;
}
static inline int f2fs_has_inline_xattr(struct inode *inode)
{
return is_inode_flag_set(inode, FI_INLINE_XATTR);
}
static inline unsigned int addrs_per_inode(struct inode *inode)
{
if (f2fs_has_inline_xattr(inode))
return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
return DEF_ADDRS_PER_INODE;
}
static inline void *inline_xattr_addr(struct page *page)
{
struct f2fs_inode *ri = F2FS_INODE(page);
return (void *)&(ri->i_addr[DEF_ADDRS_PER_INODE -
F2FS_INLINE_XATTR_ADDRS]);
}
static inline int inline_xattr_size(struct inode *inode)
{
if (f2fs_has_inline_xattr(inode))
return F2FS_INLINE_XATTR_ADDRS << 2;
else
return 0;
}
static inline int f2fs_has_inline_data(struct inode *inode)
{
return is_inode_flag_set(inode, FI_INLINE_DATA);
}
static inline void f2fs_clear_inline_inode(struct inode *inode)
{
clear_inode_flag(inode, FI_INLINE_DATA);
clear_inode_flag(inode, FI_DATA_EXIST);
}
static inline int f2fs_exist_data(struct inode *inode)
{
return is_inode_flag_set(inode, FI_DATA_EXIST);
}
static inline int f2fs_has_inline_dots(struct inode *inode)
{
return is_inode_flag_set(inode, FI_INLINE_DOTS);
}
static inline bool f2fs_is_atomic_file(struct inode *inode)
{
return is_inode_flag_set(inode, FI_ATOMIC_FILE);
}
static inline bool f2fs_is_volatile_file(struct inode *inode)
{
return is_inode_flag_set(inode, FI_VOLATILE_FILE);
}
static inline bool f2fs_is_first_block_written(struct inode *inode)
{
return is_inode_flag_set(inode, FI_FIRST_BLOCK_WRITTEN);
}
static inline bool f2fs_is_drop_cache(struct inode *inode)
{
return is_inode_flag_set(inode, FI_DROP_CACHE);
}
static inline void *inline_data_addr(struct page *page)
{
struct f2fs_inode *ri = F2FS_INODE(page);
return (void *)&(ri->i_addr[1]);
}
static inline int f2fs_has_inline_dentry(struct inode *inode)
{
return is_inode_flag_set(inode, FI_INLINE_DENTRY);
}
static inline void f2fs_dentry_kunmap(struct inode *dir, struct page *page)
{
if (!f2fs_has_inline_dentry(dir))
kunmap(page);
}
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;
f2fs_mark_inode_dirty_sync(inode);
}
static inline void clear_file(struct inode *inode, int type)
{
F2FS_I(inode)->i_advise &= ~type;
f2fs_mark_inode_dirty_sync(inode);
}
static inline int f2fs_readonly(struct super_block *sb)
{
return sb->s_flags & MS_RDONLY;
}
static inline bool f2fs_cp_error(struct f2fs_sb_info *sbi)
{
return is_set_ckpt_flags(sbi, CP_ERROR_FLAG);
}
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;
}
static inline bool f2fs_may_extent_tree(struct inode *inode)
{
if (!test_opt(F2FS_I_SB(inode), EXTENT_CACHE) ||
is_inode_flag_set(inode, FI_NO_EXTENT))
return false;
return S_ISREG(inode->i_mode);
}
static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
size_t size, gfp_t flags)
{
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_KMALLOC))
return NULL;
#endif
return kmalloc(size, flags);
}
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;
}
#define get_inode_mode(i) \
((is_inode_flag_set(i, FI_ACL_MODE)) ? \
(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
/* get offset of first page in next direct node */
#define PGOFS_OF_NEXT_DNODE(pgofs, inode) \
((pgofs < ADDRS_PER_INODE(inode)) ? ADDRS_PER_INODE(inode) : \
(pgofs - ADDRS_PER_INODE(inode) + ADDRS_PER_BLOCK) / \
ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode))
/*
* file.c
*/
int f2fs_sync_file(struct file *, loff_t, loff_t, int);
void truncate_data_blocks(struct dnode_of_data *);
int truncate_blocks(struct inode *, u64, bool);
int f2fs_truncate(struct inode *);
int f2fs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
int f2fs_setattr(struct dentry *, struct iattr *);
int truncate_hole(struct inode *, pgoff_t, pgoff_t);
int truncate_data_blocks_range(struct dnode_of_data *, int);
long f2fs_ioctl(struct file *, unsigned int, unsigned long);
long f2fs_compat_ioctl(struct file *, unsigned int, unsigned long);
/*
* inode.c
*/
void f2fs_set_inode_flags(struct inode *);
struct inode *f2fs_iget(struct super_block *, unsigned long);
struct inode *f2fs_iget_retry(struct super_block *, unsigned long);
int try_to_free_nats(struct f2fs_sb_info *, int);
int update_inode(struct inode *, struct page *);
int update_inode_page(struct inode *);
int f2fs_write_inode(struct inode *, struct writeback_control *);
void f2fs_evict_inode(struct inode *);
void handle_failed_inode(struct inode *);
/*
* namei.c
*/
struct dentry *f2fs_get_parent(struct dentry *child);
/*
* dir.c
*/
void set_de_type(struct f2fs_dir_entry *, umode_t);
unsigned char get_de_type(struct f2fs_dir_entry *);
struct f2fs_dir_entry *find_target_dentry(struct fscrypt_name *,
f2fs_hash_t, int *, struct f2fs_dentry_ptr *);
bool f2fs_fill_dentries(struct dir_context *, struct f2fs_dentry_ptr *,
unsigned int, struct fscrypt_str *);
void do_make_empty_dir(struct inode *, struct inode *,
struct f2fs_dentry_ptr *);
struct page *init_inode_metadata(struct inode *, struct inode *,
const struct qstr *, const struct qstr *, struct page *);
void update_parent_metadata(struct inode *, struct inode *, unsigned int);
int room_for_filename(const void *, int, int);
void f2fs_drop_nlink(struct inode *, struct inode *);
struct f2fs_dir_entry *__f2fs_find_entry(struct inode *, struct fscrypt_name *,
struct page **);
struct f2fs_dir_entry *f2fs_find_entry(struct inode *, const struct qstr *,
struct page **);
struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
ino_t f2fs_inode_by_name(struct inode *, const struct qstr *, struct page **);
void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
struct page *, struct inode *);
int update_dent_inode(struct inode *, struct inode *, const struct qstr *);
void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *,
const struct qstr *, f2fs_hash_t , unsigned int);
int f2fs_add_regular_entry(struct inode *, const struct qstr *,
const struct qstr *, struct inode *, nid_t, umode_t);
int __f2fs_do_add_link(struct inode *, struct fscrypt_name*, struct inode *,
nid_t, umode_t);
int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *, nid_t,
umode_t);
void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *,
struct inode *);
int f2fs_do_tmpfile(struct inode *, struct inode *);
bool f2fs_empty_dir(struct inode *);
static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
{
return __f2fs_add_link(d_inode(dentry->d_parent), &dentry->d_name,
inode, inode->i_ino, inode->i_mode);
}
/*
* super.c
*/
int f2fs_inode_dirtied(struct inode *);
void f2fs_inode_synced(struct inode *);
int f2fs_commit_super(struct f2fs_sb_info *, bool);
int f2fs_sync_fs(struct super_block *, int);
extern __printf(3, 4)
void f2fs_msg(struct super_block *, const char *, const char *, ...);
int sanity_check_ckpt(struct f2fs_sb_info *sbi);
/*
* hash.c
*/
f2fs_hash_t f2fs_dentry_hash(const struct qstr *);
/*
* node.c
*/
struct dnode_of_data;
struct node_info;
bool available_free_memory(struct f2fs_sb_info *, int);
int need_dentry_mark(struct f2fs_sb_info *, nid_t);
bool is_checkpointed_node(struct f2fs_sb_info *, nid_t);
bool need_inode_block_update(struct f2fs_sb_info *, nid_t);
void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
pgoff_t get_next_page_offset(struct dnode_of_data *, pgoff_t);
int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
int truncate_inode_blocks(struct inode *, pgoff_t);
int truncate_xattr_node(struct inode *, struct page *);
int wait_on_node_pages_writeback(struct f2fs_sb_info *, nid_t);
int remove_inode_page(struct inode *);
struct page *new_inode_page(struct inode *);
struct page *new_node_page(struct dnode_of_data *, unsigned int, struct page *);
void ra_node_page(struct f2fs_sb_info *, nid_t);
struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
struct page *get_node_page_ra(struct page *, int);
void move_node_page(struct page *, int);
int fsync_node_pages(struct f2fs_sb_info *, struct inode *,
struct writeback_control *, bool);
int sync_node_pages(struct f2fs_sb_info *, struct writeback_control *);
void build_free_nids(struct f2fs_sb_info *);
bool alloc_nid(struct f2fs_sb_info *, nid_t *);
void alloc_nid_done(struct f2fs_sb_info *, nid_t);
void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
int try_to_free_nids(struct f2fs_sb_info *, int);
void recover_inline_xattr(struct inode *, struct page *);
void recover_xattr_data(struct inode *, struct page *, block_t);
int recover_inode_page(struct f2fs_sb_info *, struct page *);
int restore_node_summary(struct f2fs_sb_info *, unsigned int,
struct f2fs_summary_block *);
void flush_nat_entries(struct f2fs_sb_info *);
int build_node_manager(struct f2fs_sb_info *);
void destroy_node_manager(struct f2fs_sb_info *);
int __init create_node_manager_caches(void);
void destroy_node_manager_caches(void);
/*
* segment.c
*/
void register_inmem_page(struct inode *, struct page *);
void drop_inmem_pages(struct inode *);
int commit_inmem_pages(struct inode *);
void f2fs_balance_fs(struct f2fs_sb_info *, bool);
void f2fs_balance_fs_bg(struct f2fs_sb_info *);
int f2fs_issue_flush(struct f2fs_sb_info *);
int create_flush_cmd_control(struct f2fs_sb_info *);
void destroy_flush_cmd_control(struct f2fs_sb_info *);
void invalidate_blocks(struct f2fs_sb_info *, block_t);
bool is_checkpointed_data(struct f2fs_sb_info *, block_t);
void refresh_sit_entry(struct f2fs_sb_info *, block_t, block_t);
void f2fs_wait_all_discard_bio(struct f2fs_sb_info *);
void clear_prefree_segments(struct f2fs_sb_info *, struct cp_control *);
void release_discard_addrs(struct f2fs_sb_info *);
int npages_for_summary_flush(struct f2fs_sb_info *, bool);
void allocate_new_segments(struct f2fs_sb_info *);
int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *);
struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
void update_meta_page(struct f2fs_sb_info *, void *, block_t);
void write_meta_page(struct f2fs_sb_info *, struct page *);
void write_node_page(unsigned int, struct f2fs_io_info *);
void write_data_page(struct dnode_of_data *, struct f2fs_io_info *);
void rewrite_data_page(struct f2fs_io_info *);
void __f2fs_replace_block(struct f2fs_sb_info *, struct f2fs_summary *,
block_t, block_t, bool, bool);
void f2fs_replace_block(struct f2fs_sb_info *, struct dnode_of_data *,
block_t, block_t, unsigned char, bool, bool);
void allocate_data_block(struct f2fs_sb_info *, struct page *,
block_t, block_t *, struct f2fs_summary *, int);
void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *, block_t);
void write_data_summaries(struct f2fs_sb_info *, block_t);
void write_node_summaries(struct f2fs_sb_info *, block_t);
int lookup_journal_in_cursum(struct f2fs_journal *, int, unsigned int, int);
void flush_sit_entries(struct f2fs_sb_info *, struct cp_control *);
int build_segment_manager(struct f2fs_sb_info *);
void destroy_segment_manager(struct f2fs_sb_info *);
int __init create_segment_manager_caches(void);
void destroy_segment_manager_caches(void);
/*
* checkpoint.c
*/
void f2fs_stop_checkpoint(struct f2fs_sb_info *, bool);
struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
struct page *get_tmp_page(struct f2fs_sb_info *, pgoff_t);
bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int, bool);
void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
void add_ino_entry(struct f2fs_sb_info *, nid_t, int type);
void remove_ino_entry(struct f2fs_sb_info *, nid_t, int type);
void release_ino_entry(struct f2fs_sb_info *, bool);
bool exist_written_data(struct f2fs_sb_info *, nid_t, int);
int f2fs_sync_inode_meta(struct f2fs_sb_info *);
int acquire_orphan_inode(struct f2fs_sb_info *);
void release_orphan_inode(struct f2fs_sb_info *);
void add_orphan_inode(struct inode *);
void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
int recover_orphan_inodes(struct f2fs_sb_info *);
int get_valid_checkpoint(struct f2fs_sb_info *);
void update_dirty_page(struct inode *, struct page *);
void remove_dirty_inode(struct inode *);
int sync_dirty_inodes(struct f2fs_sb_info *, enum inode_type);
int write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
void init_ino_entry_info(struct f2fs_sb_info *);
int __init create_checkpoint_caches(void);
void destroy_checkpoint_caches(void);
/*
* data.c
*/
void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *, struct inode *,
struct page *, nid_t, enum page_type, int);
void f2fs_flush_merged_bios(struct f2fs_sb_info *);
int f2fs_submit_page_bio(struct f2fs_io_info *);
void f2fs_submit_page_mbio(struct f2fs_io_info *);
void set_data_blkaddr(struct dnode_of_data *);
void f2fs_update_data_blkaddr(struct dnode_of_data *, block_t);
int reserve_new_blocks(struct dnode_of_data *, blkcnt_t);
int reserve_new_block(struct dnode_of_data *);
int f2fs_get_block(struct dnode_of_data *, pgoff_t);
ssize_t f2fs_preallocate_blocks(struct kiocb *, struct iov_iter *);
int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
struct page *get_read_data_page(struct inode *, pgoff_t, int, bool);
struct page *find_data_page(struct inode *, pgoff_t);
struct page *get_lock_data_page(struct inode *, pgoff_t, bool);
struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
int do_write_data_page(struct f2fs_io_info *);
int f2fs_map_blocks(struct inode *, struct f2fs_map_blocks *, int, int);
int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *, u64, u64);
void f2fs_set_page_dirty_nobuffers(struct page *);
void f2fs_invalidate_page(struct page *, unsigned int, unsigned int);
int f2fs_release_page(struct page *, gfp_t);
#ifdef CONFIG_MIGRATION
int f2fs_migrate_page(struct address_space *, struct page *, struct page *,
enum migrate_mode);
#endif
/*
* gc.c
*/
int start_gc_thread(struct f2fs_sb_info *);
void stop_gc_thread(struct f2fs_sb_info *);
block_t start_bidx_of_node(unsigned int, struct inode *);
int f2fs_gc(struct f2fs_sb_info *, bool);
void build_gc_manager(struct f2fs_sb_info *);
/*
* recovery.c
*/
int recover_fsync_data(struct f2fs_sb_info *, bool);
bool space_for_roll_forward(struct f2fs_sb_info *);
/*
* 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;
unsigned long long hit_largest, hit_cached, hit_rbtree;
unsigned long long hit_total, total_ext;
int ext_tree, zombie_tree, ext_node;
s64 ndirty_node, ndirty_dent, ndirty_meta, ndirty_data, ndirty_imeta;
s64 inmem_pages;
unsigned int ndirty_dirs, ndirty_files, ndirty_all;
int nats, dirty_nats, sits, dirty_sits, fnids;
int total_count, utilization;
int bg_gc, wb_bios;
int inline_xattr, inline_inode, inline_dir, orphans;
unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;
unsigned int bimodal, avg_vblocks;
int util_free, util_valid, util_invalid;
int rsvd_segs, overp_segs;
int dirty_count, node_pages, meta_pages;
int prefree_count, call_count, cp_count, bg_cp_count;
int tot_segs, node_segs, data_segs, free_segs, free_secs;
int bg_node_segs, bg_data_segs;
int tot_blks, data_blks, node_blks;
int bg_data_blks, bg_node_blks;
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];
unsigned int inplace_count;
unsigned long long base_mem, cache_mem, page_mem;
};
static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
{
return (struct f2fs_stat_info *)sbi->stat_info;
}
#define stat_inc_cp_count(si) ((si)->cp_count++)
#define stat_inc_bg_cp_count(si) ((si)->bg_cp_count++)
#define stat_inc_call_count(si) ((si)->call_count++)
#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
#define stat_inc_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]++)
#define stat_dec_dirty_inode(sbi, type) ((sbi)->ndirty_inode[type]--)
#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))
#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)
#define stat_inc_inline_inode(inode) \
do { \
if (f2fs_has_inline_data(inode)) \
(atomic_inc(&F2FS_I_SB(inode)->inline_inode)); \
} while (0)
#define stat_dec_inline_inode(inode) \
do { \
if (f2fs_has_inline_data(inode)) \
(atomic_dec(&F2FS_I_SB(inode)->inline_inode)); \
} while (0)
#define stat_inc_inline_dir(inode) \
do { \
if (f2fs_has_inline_dentry(inode)) \
(atomic_inc(&F2FS_I_SB(inode)->inline_dir)); \
} while (0)
#define stat_dec_inline_dir(inode) \
do { \
if (f2fs_has_inline_dentry(inode)) \
(atomic_dec(&F2FS_I_SB(inode)->inline_dir)); \
} while (0)
#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]++)
#define stat_inc_inplace_blocks(sbi) \
(atomic_inc(&(sbi)->inplace_count))
#define stat_inc_seg_count(sbi, type, gc_type) \
do { \
struct f2fs_stat_info *si = F2FS_STAT(sbi); \
(si)->tot_segs++; \
if (type == SUM_TYPE_DATA) { \
si->data_segs++; \
si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0; \
} else { \
si->node_segs++; \
si->bg_node_segs += (gc_type == BG_GC) ? 1 : 0; \
} \
} while (0)
#define stat_inc_tot_blk_count(si, blks) \
(si->tot_blks += (blks))
#define stat_inc_data_blk_count(sbi, blks, gc_type) \
do { \
struct f2fs_stat_info *si = F2FS_STAT(sbi); \
stat_inc_tot_blk_count(si, blks); \
si->data_blks += (blks); \
si->bg_data_blks += (gc_type == BG_GC) ? (blks) : 0; \
} while (0)
#define stat_inc_node_blk_count(sbi, blks, gc_type) \
do { \
struct f2fs_stat_info *si = F2FS_STAT(sbi); \
stat_inc_tot_blk_count(si, blks); \
si->node_blks += (blks); \
si->bg_node_blks += (gc_type == BG_GC) ? (blks) : 0; \
} while (0)
int f2fs_build_stats(struct f2fs_sb_info *);
void f2fs_destroy_stats(struct f2fs_sb_info *);
int __init f2fs_create_root_stats(void);
void f2fs_destroy_root_stats(void);
#else
#define stat_inc_cp_count(si)
#define stat_inc_bg_cp_count(si)
#define stat_inc_call_count(si)
#define stat_inc_bggc_count(si)
#define stat_inc_dirty_inode(sbi, type)
#define stat_dec_dirty_inode(sbi, type)
#define stat_inc_total_hit(sb)
#define stat_inc_rbtree_node_hit(sb)
#define stat_inc_largest_node_hit(sbi)
#define stat_inc_cached_node_hit(sbi)
#define stat_inc_inline_xattr(inode)
#define stat_dec_inline_xattr(inode)
#define stat_inc_inline_inode(inode)
#define stat_dec_inline_inode(inode)
#define stat_inc_inline_dir(inode)
#define stat_dec_inline_dir(inode)
#define stat_inc_seg_type(sbi, curseg)
#define stat_inc_block_count(sbi, curseg)
#define stat_inc_inplace_blocks(sbi)
#define stat_inc_seg_count(sbi, type, gc_type)
#define stat_inc_tot_blk_count(si, blks)
#define stat_inc_data_blk_count(sbi, blks, gc_type)
#define stat_inc_node_blk_count(sbi, blks, gc_type)
static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
static inline int __init f2fs_create_root_stats(void) { return 0; }
static inline void f2fs_destroy_root_stats(void) { }
#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;
extern const struct inode_operations f2fs_encrypted_symlink_inode_operations;
extern const struct inode_operations f2fs_special_inode_operations;
extern struct kmem_cache *inode_entry_slab;
/*
* inline.c
*/
bool f2fs_may_inline_data(struct inode *);
bool f2fs_may_inline_dentry(struct inode *);
void read_inline_data(struct page *, struct page *);
bool truncate_inline_inode(struct page *, u64);
int f2fs_read_inline_data(struct inode *, struct page *);
int f2fs_convert_inline_page(struct dnode_of_data *, struct page *);
int f2fs_convert_inline_inode(struct inode *);
int f2fs_write_inline_data(struct inode *, struct page *);
bool recover_inline_data(struct inode *, struct page *);
struct f2fs_dir_entry *find_in_inline_dir(struct inode *,
struct fscrypt_name *, struct page **);
int make_empty_inline_dir(struct inode *inode, struct inode *, struct page *);
int f2fs_add_inline_entry(struct inode *, const struct qstr *,
const struct qstr *, struct inode *, nid_t, umode_t);
void f2fs_delete_inline_entry(struct f2fs_dir_entry *, struct page *,
struct inode *, struct inode *);
bool f2fs_empty_inline_dir(struct inode *);
int f2fs_read_inline_dir(struct file *, struct dir_context *,
struct fscrypt_str *);
int f2fs_inline_data_fiemap(struct inode *,
struct fiemap_extent_info *, __u64, __u64);
/*
* shrinker.c
*/
unsigned long f2fs_shrink_count(struct shrinker *, struct shrink_control *);
unsigned long f2fs_shrink_scan(struct shrinker *, struct shrink_control *);
void f2fs_join_shrinker(struct f2fs_sb_info *);
void f2fs_leave_shrinker(struct f2fs_sb_info *);
/*
* extent_cache.c
*/
unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
bool f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
void f2fs_drop_extent_tree(struct inode *);
unsigned int f2fs_destroy_extent_node(struct inode *);
void f2fs_destroy_extent_tree(struct inode *);
bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *);
void f2fs_update_extent_cache(struct dnode_of_data *);
void f2fs_update_extent_cache_range(struct dnode_of_data *dn,
pgoff_t, block_t, unsigned int);
void init_extent_cache_info(struct f2fs_sb_info *);
int __init create_extent_cache(void);
void destroy_extent_cache(void);
/*
* crypto support
*/
static inline bool f2fs_encrypted_inode(struct inode *inode)
{
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)
{
return bio->bi_private != NULL;
}
static inline int f2fs_sb_has_crypto(struct super_block *sb)
{
return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT);
}
static inline int f2fs_sb_mounted_hmsmr(struct super_block *sb)
{
return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_HMSMR);
}
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;
}
}
static inline bool f2fs_may_encrypt(struct inode *inode)
{
#ifdef CONFIG_F2FS_FS_ENCRYPTION
umode_t mode = inode->i_mode;
return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
#else
return 0;
#endif
}
#ifndef CONFIG_F2FS_FS_ENCRYPTION
#define fscrypt_set_d_op(i)
#define fscrypt_get_ctx fscrypt_notsupp_get_ctx
#define fscrypt_release_ctx fscrypt_notsupp_release_ctx
#define fscrypt_encrypt_page fscrypt_notsupp_encrypt_page
#define fscrypt_decrypt_page fscrypt_notsupp_decrypt_page
#define fscrypt_decrypt_bio_pages fscrypt_notsupp_decrypt_bio_pages
#define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page
#define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page
#define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range
#define fscrypt_process_policy fscrypt_notsupp_process_policy
#define fscrypt_get_policy fscrypt_notsupp_get_policy
#define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context
#define fscrypt_inherit_context fscrypt_notsupp_inherit_context
#define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info
#define fscrypt_put_encryption_info fscrypt_notsupp_put_encryption_info
#define fscrypt_setup_filename fscrypt_notsupp_setup_filename
#define fscrypt_free_filename fscrypt_notsupp_free_filename
#define fscrypt_fname_encrypted_size fscrypt_notsupp_fname_encrypted_size
#define fscrypt_fname_alloc_buffer fscrypt_notsupp_fname_alloc_buffer
#define fscrypt_fname_free_buffer fscrypt_notsupp_fname_free_buffer
#define fscrypt_fname_disk_to_usr fscrypt_notsupp_fname_disk_to_usr
#define fscrypt_fname_usr_to_disk fscrypt_notsupp_fname_usr_to_disk
#endif
#endif
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