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Message-id: <001301cdb0c5$db3175b0$91946110$%kim@samsung.com>
Date: Tue, 23 Oct 2012 11:26:49 +0900
From: Jaegeuk Kim <jaegeuk.kim@...sung.com>
To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org, viro@...iv.linux.org.uk, arnd@...db.de,
tytso@....edu, chur.lee@...sung.com, cm224.lee@...sung.com,
jooyoung.hwang@...sung.com
Subject: [PATCH 03/16 v2] f2fs: add superblock and major in-memory structure
This adds the following major in-memory structures in f2fs.
- f2fs_sb_info:
contains f2fs-specific information, two special inode pointers for node and
meta address spaces, and orphan inode management.
- f2fs_inode_info:
contains vfs_inode and other fs-specific information.
- f2fs_nm_info:
contains node manager information such as NAT entry cache, free nid list,
and NAT page management.
- f2fs_node_info:
represents a node as node id, inode number, block address, and its version.
- f2fs_sm_info:
contains segment manager information such as SIT entry cache, free segment
map, current active logs, dirty segment management, and segment utilization.
The specific structures are sit_info, free_segmap_info, dirty_seglist_info,
curseg_info.
Signed-off-by: Chul Lee <chur.lee@...sung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
---
fs/f2fs/f2fs.h | 982 +++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/f2fs/node.h | 330 ++++++++++++++++++
fs/f2fs/segment.h | 594 ++++++++++++++++++++++++++++++++
3 files changed, 1906 insertions(+)
create mode 100644 fs/f2fs/f2fs.h
create mode 100644 fs/f2fs/node.h
create mode 100644 fs/f2fs/segment.h
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
new file mode 100644
index 0000000..bbe2f02
--- /dev/null
+++ b/fs/f2fs/f2fs.h
@@ -0,0 +1,982 @@
+/**
+ * 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/version.h>
+#include <linux/slab.h>
+#include <linux/crc32.h>
+
+/**
+ * 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 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 u64 block_t;
+typedef u32 nid_t;
+
+struct f2fs_mount_info {
+ unsigned int opt;
+};
+
+static inline __u32 f2fs_crc32(void *buff, size_t len)
+{
+ return crc32_le(F2FS_SUPER_MAGIC, buff, len);
+}
+
+static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size)
+{
+ return f2fs_crc32(buff, buff_size) == blk_crc;
+}
+
+/**
+ * For checkpoint manager
+ */
+#define CP_ERROR_FLAG 0x00000008
+#define CP_COMPACT_SUM_FLAG 0x00000004
+#define CP_ORPHAN_PRESENT_FLAG 0x00000002
+#define CP_UMOUNT_FLAG 0x00000001
+
+enum {
+ NAT_BITMAP,
+ SIT_BITMAP
+};
+
+struct orphan_inode_entry {
+ struct list_head list;
+ nid_t ino;
+};
+
+struct dir_inode_entry {
+ struct list_head list;
+ struct inode *inode;
+};
+
+struct fsync_inode_entry {
+ struct list_head list;
+ struct inode *inode;
+ block_t blkaddr;
+};
+
+#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
+#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
+
+#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
+#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
+#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
+#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
+
+static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
+{
+ int before = nats_in_cursum(rs);
+ rs->n_nats = cpu_to_le16(before + i);
+ return before;
+}
+
+static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
+{
+ int before = sits_in_cursum(rs);
+ rs->n_sits = cpu_to_le16(before + i);
+ return before;
+}
+
+/**
+ * For INODE and NODE manager
+ */
+#define XATTR_NODE_OFFSET (-1)
+#define RDONLY_NODE 1
+#define F2FS_LINK_MAX 32000
+
+struct extent_info {
+ rwlock_t ext_lock;
+ unsigned int fofs;
+ u32 blk_addr;
+ unsigned int len;
+};
+
+#define FADVISE_COLD_BIT 0x01
+/*
+ * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
+ */
+struct f2fs_inode_info {
+ struct inode vfs_inode;
+ unsigned long i_flags;
+ unsigned long flags;
+ unsigned long long data_version;
+ atomic_t dirty_dents;
+ unsigned int current_depth;
+ f2fs_hash_t chash;
+ unsigned int clevel;
+ nid_t i_xattr_nid;
+ struct extent_info ext;
+ umode_t i_acl_mode;
+ unsigned char i_advise; /* If true, this is cold data */
+};
+
+static inline void get_extent_info(struct extent_info *ext,
+ struct f2fs_extent i_ext)
+{
+ write_lock(&ext->ext_lock);
+ ext->fofs = le32_to_cpu(i_ext.fofs);
+ ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
+ ext->len = le32_to_cpu(i_ext.len);
+ write_unlock(&ext->ext_lock);
+}
+
+static inline void set_raw_extent(struct extent_info *ext,
+ struct f2fs_extent *i_ext)
+{
+ read_lock(&ext->ext_lock);
+ i_ext->fofs = cpu_to_le32(ext->fofs);
+ i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
+ i_ext->len = cpu_to_le32(ext->len);
+ read_unlock(&ext->ext_lock);
+}
+
+struct f2fs_nm_info {
+ block_t nat_blkaddr; /* base disk address of NAT */
+ unsigned int nat_segs; /* the number of nat segments */
+ unsigned int nat_blocks; /* the number of nat blocks of
+ one size */
+ nid_t max_nid;
+ unsigned int nat_cnt; /* the number of nodes in NAT Buffer */
+ struct radix_tree_root nat_root;
+ rwlock_t nat_tree_lock; /* Protect nat_tree_lock */
+ struct list_head nat_entries; /* cached nat entry list (clean) */
+ struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
+
+ unsigned int fcnt; /* the number of free node id */
+ struct mutex build_lock; /* lock for build free nids */
+
+ int nat_upd_blkoff[3]; /* Block offset
+ in the current journal segment
+ where the last NAT update happened */
+ int lst_upd_blkoff[3]; /* Block offset
+ in current journal segment */
+
+ unsigned int written_valid_node_count;
+ unsigned int written_valid_inode_count;
+ char *nat_bitmap; /* NAT bitmap pointer */
+ int bitmap_size; /* bitmap size */
+
+ nid_t init_scan_nid; /* the first nid to be scanned */
+ nid_t next_scan_nid; /* the next nid to be scanned */
+ struct list_head free_nid_list;
+ spinlock_t free_nid_list_lock; /* Protect free nid list */
+};
+
+struct dnode_of_data {
+ struct inode *inode;
+ struct page *inode_page;
+ struct page *node_page;
+ nid_t nid;
+ unsigned int ofs_in_node;
+ bool inode_page_locked;
+ block_t data_blkaddr;
+};
+
+static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
+ struct page *ipage, struct page *npage, nid_t nid)
+{
+ dn->inode = inode;
+ dn->inode_page = ipage;
+ dn->node_page = npage;
+ dn->nid = nid;
+ dn->inode_page_locked = 0;
+}
+
+/**
+ * For SIT manager
+ */
+#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,
+ CURSEG_WARM_DATA,
+ CURSEG_COLD_DATA,
+ CURSEG_HOT_NODE,
+ CURSEG_WARM_NODE,
+ CURSEG_COLD_NODE,
+ NO_CHECK_TYPE
+};
+
+struct f2fs_sm_info {
+ /* SIT information */
+ struct sit_info *sit_info;
+
+ /* Free segmap infomation */
+ struct free_segmap_info *free_info;
+
+ /* Dirty segments list information for GC victim */
+ struct dirty_seglist_info *dirty_info;
+
+ /* Current working segments(i.e. logging point) information array */
+ struct curseg_info *curseg_array;
+
+ /* list head of all under-writeback pages for flush handling */
+ struct list_head wblist_head;
+ spinlock_t wblist_lock;
+
+ block_t seg0_blkaddr;
+ block_t main_blkaddr;
+ unsigned int segment_count;
+ unsigned int rsvd_segment_count;
+ unsigned int main_segment_count;
+ block_t ssa_blkaddr;
+ unsigned int segment_count_ssa;
+};
+
+/**
+ * For Garbage Collection
+ */
+struct f2fs_gc_info {
+#ifdef CONFIG_F2FS_STAT_FS
+ struct list_head stat_list;
+ struct f2fs_stat_info *stat_info;
+#endif
+ int cause;
+ int rsvd_segment_count;
+ int overp_segment_count;
+};
+
+/**
+ * For directory operation
+ */
+#define F2FS_INODE_SIZE (17 * 4 + F2FS_MAX_NAME_LEN)
+#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
+#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
+#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
+#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
+#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
+
+/**
+ * For superblock
+ */
+enum count_type {
+ F2FS_WRITEBACK,
+ F2FS_DIRTY_DENTS,
+ F2FS_DIRTY_NODES,
+ F2FS_DIRTY_META,
+ NR_COUNT_TYPE,
+};
+
+/*
+ * FS_LOCK nesting subclasses for the lock validator:
+ *
+ * The locking order between these classes is
+ * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW
+ * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC
+ */
+enum lock_type {
+ RENAME, /* for renaming operations */
+ DENTRY_OPS, /* for directory operations */
+ DATA_WRITE, /* for data write */
+ DATA_NEW, /* for data allocation */
+ DATA_TRUNC, /* for data truncate */
+ NODE_NEW, /* for node allocation */
+ NODE_TRUNC, /* for node truncate */
+ NODE_WRITE, /* for node write */
+ NR_LOCK_TYPE,
+};
+
+/*
+ * The below are the page types of bios used in submti_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.
+ */
+enum page_type {
+ DATA,
+ NODE,
+ META,
+ NR_PAGE_TYPE,
+ META_FLUSH,
+};
+
+struct f2fs_sb_info {
+ struct super_block *sb; /* Pointer to VFS super block */
+ int s_dirty;
+ struct f2fs_super_block *raw_super; /* Pointer to the super block
+ in the buffer */
+ struct buffer_head *raw_super_buf; /* Buffer containing
+ the f2fs raw super block */
+ struct f2fs_checkpoint *ckpt; /* Pointer to the checkpoint
+ in the buffer */
+ struct mutex orphan_inode_mutex;
+ spinlock_t dir_inode_lock;
+ struct mutex cp_mutex;
+ /* orphan Inode list to be written in Journal block during CP */
+ struct list_head orphan_inode_list;
+ struct list_head dir_inode_list;
+ unsigned int n_orphans, n_dirty_dirs;
+
+ unsigned int log_sectorsize;
+ unsigned int log_sectors_per_block;
+ unsigned int log_blocksize;
+ unsigned int blocksize;
+ unsigned int root_ino_num; /* Root Inode Number*/
+ unsigned int node_ino_num; /* Root Inode Number*/
+ unsigned int meta_ino_num; /* Root Inode Number*/
+ unsigned int log_blocks_per_seg;
+ unsigned int blocks_per_seg;
+ unsigned int segs_per_sec;
+ unsigned int secs_per_zone;
+ unsigned int total_sections;
+ unsigned int total_node_count;
+ unsigned int total_valid_node_count;
+ unsigned int total_valid_inode_count;
+ unsigned int segment_count[2];
+ unsigned int block_count[2];
+ unsigned int last_victim[2];
+ int active_logs;
+ block_t user_block_count;
+ block_t total_valid_block_count;
+ block_t alloc_valid_block_count;
+ block_t last_valid_block_count;
+ atomic_t nr_pages[NR_COUNT_TYPE];
+
+ struct f2fs_mount_info mount_opt;
+
+ /* related to NM */
+ struct f2fs_nm_info *nm_info; /* Node Manager information */
+
+ /* related to SM */
+ struct f2fs_sm_info *sm_info; /* Segment Manager
+ information */
+ int total_hit_ext, read_hit_ext;
+ int rr_flush;
+
+ /* related to GC */
+ struct proc_dir_entry *s_proc;
+ struct f2fs_gc_info *gc_info; /* Garbage Collector
+ information */
+ struct mutex gc_mutex; /* mutex for GC */
+ struct mutex fs_lock[NR_LOCK_TYPE]; /* mutex for GP */
+ struct mutex write_inode; /* mutex for write inode */
+ struct mutex writepages; /* mutex for writepages() */
+ struct f2fs_gc_kthread *gc_thread; /* GC thread */
+ int bg_gc;
+ int last_gc_status;
+ int por_doing;
+
+ struct inode *node_inode;
+ struct inode *meta_inode;
+
+ struct bio *bio[NR_PAGE_TYPE];
+ sector_t last_block_in_bio[NR_PAGE_TYPE];
+ struct rw_semaphore bio_sem;
+ spinlock_t stat_lock; /* lock for handling the number
+ of valid blocks and
+ valid nodes */
+};
+
+/**
+ * Inline functions
+ */
+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_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_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 void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
+{
+ sbi->s_dirty = 1;
+}
+
+static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
+{
+ sbi->s_dirty = 0;
+}
+
+static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t)
+{
+ mutex_lock_nested(&sbi->fs_lock[t], t);
+}
+
+static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t)
+{
+ mutex_unlock(&sbi->fs_lock[t]);
+}
+
+/**
+ * Check whether the given nid is within node id range.
+ */
+static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ BUG_ON((nid >= NM_I(sbi)->max_nid));
+}
+
+#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 inc_valid_block_count(struct f2fs_sb_info *sbi,
+ struct inode *inode, blkcnt_t count)
+{
+ block_t valid_block_count;
+
+ spin_lock(&sbi->stat_lock);
+ valid_block_count =
+ sbi->total_valid_block_count + (block_t)count;
+ if (valid_block_count > sbi->user_block_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+ inode->i_blocks += count;
+ sbi->total_valid_block_count = valid_block_count;
+ sbi->alloc_valid_block_count += (block_t)count;
+ spin_unlock(&sbi->stat_lock);
+ return true;
+}
+
+static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
+ struct inode *inode,
+ blkcnt_t count)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(sbi->total_valid_block_count < (block_t) count);
+ BUG_ON(inode->i_blocks < count);
+ inode->i_blocks -= count;
+ sbi->total_valid_block_count -= (block_t)count;
+ spin_unlock(&sbi->stat_lock);
+ return 0;
+}
+
+static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
+{
+ atomic_inc(&sbi->nr_pages[count_type]);
+ F2FS_SET_SB_DIRT(sbi);
+}
+
+static inline void inode_inc_dirty_dents(struct inode *inode)
+{
+ atomic_inc(&F2FS_I(inode)->dirty_dents);
+}
+
+static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
+{
+ atomic_dec(&sbi->nr_pages[count_type]);
+}
+
+static inline void inode_dec_dirty_dents(struct inode *inode)
+{
+ atomic_dec(&F2FS_I(inode)->dirty_dents);
+}
+
+static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
+{
+ return atomic_read(&sbi->nr_pages[count_type]);
+}
+
+static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
+{
+ block_t ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_block_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+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 void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ int offset = (flag == NAT_BITMAP) ? 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 = le64_to_cpu(ckpt->checkpoint_ver);
+
+ start_addr = le64_to_cpu(F2FS_RAW_SUPER(sbi)->start_segment_checkpoint);
+
+ /*
+ * odd numbered checkpoint shoukd at cp segment 0
+ * and even segent 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,
+ unsigned int count)
+{
+ block_t valid_block_count;
+ unsigned int valid_node_count;
+
+ spin_lock(&sbi->stat_lock);
+
+ valid_block_count = sbi->total_valid_block_count + (block_t)count;
+ sbi->alloc_valid_block_count += (block_t)count;
+ valid_node_count = sbi->total_valid_node_count + count;
+
+ if (valid_block_count > sbi->user_block_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+
+ if (valid_node_count > sbi->total_node_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+
+ if (inode)
+ inode->i_blocks += count;
+ sbi->total_valid_node_count = valid_node_count;
+ sbi->total_valid_block_count = valid_block_count;
+ spin_unlock(&sbi->stat_lock);
+
+ return true;
+}
+
+static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
+ struct inode *inode,
+ unsigned int count)
+{
+ spin_lock(&sbi->stat_lock);
+
+ BUG_ON(sbi->total_valid_block_count < count);
+ BUG_ON(sbi->total_valid_node_count < count);
+ BUG_ON(inode->i_blocks < count);
+
+ inode->i_blocks -= count;
+ sbi->total_valid_node_count -= count;
+ sbi->total_valid_block_count -= (block_t)count;
+
+ spin_unlock(&sbi->stat_lock);
+}
+
+static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
+{
+ unsigned int ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_node_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
+ sbi->total_valid_inode_count++;
+ spin_unlock(&sbi->stat_lock);
+}
+
+static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(!sbi->total_valid_inode_count);
+ sbi->total_valid_inode_count--;
+ spin_unlock(&sbi->stat_lock);
+ return 0;
+}
+
+static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ unsigned int ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_inode_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+static inline void f2fs_put_page(struct page *page, int unlock)
+{
+ if (!page || IS_ERR(page))
+ return;
+
+ if (unlock) {
+ BUG_ON(!PageLocked(page));
+ unlock_page(page);
+ }
+ page_cache_release(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, void (*ctor)(void *))
+{
+ return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
+}
+
+#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
+
+static inline bool IS_INODE(struct page *page)
+{
+ struct f2fs_node *p = (struct f2fs_node *)page_address(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 = (struct f2fs_node *)page_address(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 int f2fs_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_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;
+}
+
+enum {
+ FI_NEW_INODE,
+ FI_NEED_CP,
+ FI_INC_LINK,
+ FI_ACL_MODE,
+ FI_NO_ALLOC,
+};
+
+static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ set_bit(flag, &fi->flags);
+}
+
+static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
+{
+ return test_bit(flag, &fi->flags);
+}
+
+static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ clear_bit(flag, &fi->flags);
+}
+
+static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
+{
+ fi->i_acl_mode = mode;
+ set_inode_flag(fi, FI_ACL_MODE);
+}
+
+static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ if (is_inode_flag_set(fi, FI_ACL_MODE)) {
+ clear_inode_flag(fi, FI_ACL_MODE);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * file.c
+ */
+int f2fs_sync_file(struct file *, loff_t, loff_t, int);
+void truncate_data_blocks(struct dnode_of_data *);
+void f2fs_truncate(struct inode *);
+int f2fs_setattr(struct dentry *, struct iattr *);
+int truncate_hole(struct inode *, pgoff_t, pgoff_t);
+long f2fs_ioctl(struct file *, unsigned int, unsigned long);
+
+/**
+ * inode.c
+ */
+void f2fs_set_inode_flags(struct inode *);
+struct inode *f2fs_iget_nowait(struct super_block *, unsigned long);
+struct inode *f2fs_iget(struct super_block *, unsigned long);
+void update_inode(struct inode *, struct page *);
+int f2fs_write_inode(struct inode *, struct writeback_control *);
+void f2fs_evict_inode(struct inode *);
+
+/**
+ * dir.c
+ */
+struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
+ struct page **);
+struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
+void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
+ struct page *, struct inode *);
+void init_dent_inode(struct dentry *, struct page *);
+int f2fs_add_link(struct dentry *, struct inode *);
+void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
+int f2fs_make_empty(struct inode *, struct inode *);
+bool f2fs_empty_dir(struct inode *);
+
+/**
+ * super.c
+ */
+int f2fs_sync_fs(struct super_block *, int);
+
+/**
+ * hash.c
+ */
+f2fs_hash_t f2fs_dentry_hash(const char *, int);
+
+/**
+ * node.c
+ */
+struct dnode_of_data;
+struct node_info;
+
+int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
+void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
+int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
+int truncate_inode_blocks(struct inode *, pgoff_t);
+int remove_inode_page(struct inode *);
+int new_inode_page(struct inode *, struct dentry *);
+struct page *new_node_page(struct dnode_of_data *, unsigned int);
+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 sync_inode_page(struct dnode_of_data *);
+int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
+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);
+void recover_node_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, struct node_info *, 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 create_node_manager_caches(void);
+void destroy_node_manager_caches(void);
+
+/**
+ * segment.c
+ */
+void f2fs_balance_fs(struct f2fs_sb_info *);
+void invalidate_blocks(struct f2fs_sb_info *, block_t);
+void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
+void clear_prefree_segments(struct f2fs_sb_info *);
+int npages_for_summary_flush(struct f2fs_sb_info *);
+void allocate_new_segments(struct f2fs_sb_info *);
+struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
+struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t);
+void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
+int write_meta_page(struct f2fs_sb_info *, struct page *,
+ struct writeback_control *);
+void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
+ block_t, block_t *);
+void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
+ block_t, block_t *);
+void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
+void recover_data_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, block_t, block_t);
+void rewrite_node_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, block_t, 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_summary_block *,
+ int, unsigned int, int);
+void flush_sit_entries(struct f2fs_sb_info *);
+int build_segment_manager(struct f2fs_sb_info *);
+void reset_victim_segmap(struct f2fs_sb_info *);
+void destroy_segment_manager(struct f2fs_sb_info *);
+
+/**
+ * checkpoint.c
+ */
+struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
+struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
+long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
+int check_orphan_space(struct f2fs_sb_info *);
+void add_orphan_inode(struct f2fs_sb_info *, nid_t);
+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 set_dirty_dir_page(struct inode *, struct page *);
+void remove_dirty_dir_inode(struct inode *);
+void sync_dirty_dir_inodes(struct f2fs_sb_info *);
+void block_operations(struct f2fs_sb_info *);
+void write_checkpoint(struct f2fs_sb_info *, bool, bool);
+void init_orphan_info(struct f2fs_sb_info *);
+int create_checkpoint_caches(void);
+void destroy_checkpoint_caches(void);
+
+/**
+ * data.c
+ */
+int reserve_new_block(struct dnode_of_data *);
+void update_extent_cache(block_t, struct dnode_of_data *);
+struct page *find_data_page(struct inode *, pgoff_t);
+struct page *get_lock_data_page(struct inode *, pgoff_t);
+struct page *get_new_data_page(struct inode *, pgoff_t, bool);
+int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
+int do_write_data_page(struct page *);
+
+/**
+ * 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);
+int f2fs_gc(struct f2fs_sb_info *, int);
+#ifdef CONFIG_F2FS_STAT_FS
+void f2fs_update_stat(struct f2fs_sb_info *);
+void f2fs_update_gc_metric(struct f2fs_sb_info *);
+int f2fs_stat_init(struct f2fs_sb_info *);
+void f2fs_stat_exit(struct f2fs_sb_info *);
+#endif
+int build_gc_manager(struct f2fs_sb_info *);
+void destroy_gc_manager(struct f2fs_sb_info *);
+int create_gc_caches(void);
+void destroy_gc_caches(void);
+
+/**
+ * recovery.c
+ */
+void recover_fsync_data(struct f2fs_sb_info *);
+bool space_for_roll_forward(struct f2fs_sb_info *);
+
+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_special_inode_operations;
+#endif
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
new file mode 100644
index 0000000..99ac689
--- /dev/null
+++ b/fs/f2fs/node.h
@@ -0,0 +1,330 @@
+/**
+ * fs/f2fs/node.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.
+ */
+#define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
+#define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
+
+#define FREE_NID_PAGES 4
+#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
+
+#define MAX_RA_NODE 128 /* Max. readahead size for node */
+#define NM_WOUT_THRESHOLD (64 * NAT_ENTRY_PER_BLOCK)
+#define NATVEC_SIZE 64
+
+/**
+ * For node information
+ */
+struct node_info {
+ nid_t nid; /* node id */
+ nid_t ino; /* inode number of the node's owner */
+ block_t blk_addr; /* block address of the node */
+ unsigned char version; /* version of the node */
+};
+
+static inline unsigned char inc_node_version(unsigned char version)
+{
+ return ++version;
+}
+
+struct nat_entry {
+ struct list_head list; /* for clean or dirty nat list */
+ bool checkpointed;
+ struct node_info ni;
+};
+
+#define nat_get_nid(nat) (nat->ni.nid)
+#define nat_set_nid(nat, n) (nat->ni.nid = n)
+#define nat_get_blkaddr(nat) (nat->ni.blk_addr)
+#define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
+#define nat_get_ino(nat) (nat->ni.ino)
+#define nat_set_ino(nat, i) (nat->ni.ino = i)
+#define nat_get_version(nat) (nat->ni.version)
+#define nat_set_version(nat, v) (nat->ni.version = v)
+#define __set_nat_cache_dirty(nm_i, ne) \
+ list_move_tail(&ne->list, &nm_i->dirty_nat_entries);
+#define __clear_nat_cache_dirty(nm_i, ne) \
+ list_move_tail(&ne->list, &nm_i->nat_entries);
+
+static inline void node_info_from_raw_nat(struct node_info *ni,
+ struct f2fs_nat_entry *raw_ne)
+{
+ ni->ino = le32_to_cpu(raw_ne->ino);
+ ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
+ ni->version = raw_ne->version;
+}
+
+/**
+ * For free nid mangement
+ */
+enum nid_state {
+ NID_NEW,
+ NID_ALLOC
+};
+
+struct free_nid {
+ nid_t nid;
+ int state;
+ struct list_head list;
+};
+
+static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct free_nid *fnid;
+
+ if (nm_i->fcnt <= 0)
+ return -1;
+ spin_lock(&nm_i->free_nid_list_lock);
+ fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
+ *nid = fnid->nid;
+ spin_unlock(&nm_i->free_nid_list_lock);
+ return 0;
+}
+
+/**
+ * inline functions
+ */
+static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
+}
+
+static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ pgoff_t block_off;
+ pgoff_t block_addr;
+ int seg_off;
+
+ block_off = NAT_BLOCK_OFFSET(start);
+ seg_off = block_off >> sbi->log_blocks_per_seg;
+
+ block_addr = (pgoff_t)(nm_i->nat_blkaddr +
+ (seg_off << sbi->log_blocks_per_seg << 1) +
+ (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
+
+ if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
+ block_addr += sbi->blocks_per_seg;
+
+ return block_addr;
+}
+
+static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
+ pgoff_t block_addr)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+
+ block_addr -= nm_i->nat_blkaddr;
+ if ((block_addr >> sbi->log_blocks_per_seg) % 2)
+ block_addr -= sbi->blocks_per_seg;
+ else
+ block_addr += sbi->blocks_per_seg;
+
+ return block_addr + nm_i->nat_blkaddr;
+}
+
+static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
+{
+ unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
+
+ if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
+ f2fs_clear_bit(block_off, nm_i->nat_bitmap);
+ else
+ f2fs_set_bit(block_off, nm_i->nat_bitmap);
+}
+
+static inline void fill_node_footer(struct page *page, nid_t nid,
+ nid_t ino, unsigned int ofs, bool reset)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ if (reset)
+ memset(rn, 0, sizeof(*rn));
+ rn->footer.nid = cpu_to_le32(nid);
+ rn->footer.ino = cpu_to_le32(ino);
+ rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
+}
+
+static inline void copy_node_footer(struct page *dst, struct page *src)
+{
+ void *src_addr = page_address(src);
+ void *dst_addr = page_address(dst);
+ struct f2fs_node *src_rn = (struct f2fs_node *)src_addr;
+ struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr;
+ memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
+}
+
+static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ rn->footer.cp_ver = ckpt->checkpoint_ver;
+ rn->footer.next_blkaddr = blkaddr;
+}
+
+static inline nid_t ino_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.ino);
+}
+
+static inline nid_t nid_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.nid);
+}
+
+static inline unsigned int ofs_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned flag = le32_to_cpu(rn->footer.flag);
+ return flag >> OFFSET_BIT_SHIFT;
+}
+
+static inline unsigned long long cpver_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le64_to_cpu(rn->footer.cp_ver);
+}
+
+static inline block_t next_blkaddr_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.next_blkaddr);
+}
+
+static inline bool IS_DNODE(struct page *node_page)
+{
+ unsigned int ofs = ofs_of_node(node_page);
+ if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
+ ofs == 5 + 2 * NIDS_PER_BLOCK)
+ return false;
+ if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
+ ofs -= 6 + 2 * NIDS_PER_BLOCK;
+ if ((long int)ofs % (NIDS_PER_BLOCK + 1))
+ return false;
+ }
+ return true;
+}
+
+static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+
+ wait_on_page_writeback(p);
+
+ if (i)
+ rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
+ else
+ rn->in.nid[off] = cpu_to_le32(nid);
+ set_page_dirty(p);
+}
+
+static inline nid_t get_nid(struct page *p, int off, bool i)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+ if (i)
+ return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
+ return le32_to_cpu(rn->in.nid[off]);
+}
+
+/**
+ * Coldness identification:
+ * - Mark cold files in f2fs_inode_info
+ * - Mark cold node blocks in their node footer
+ * - Mark cold data pages in page cache
+ */
+static inline int is_cold_file(struct inode *inode)
+{
+ return F2FS_I(inode)->i_advise & FADVISE_COLD_BIT;
+}
+
+static inline int is_cold_data(struct page *page)
+{
+ return PageChecked(page);
+}
+
+static inline void set_cold_data(struct page *page)
+{
+ SetPageChecked(page);
+}
+
+static inline void clear_cold_data(struct page *page)
+{
+ ClearPageChecked(page);
+}
+
+static inline int is_cold_node(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << COLD_BIT_SHIFT);
+}
+
+static inline unsigned char is_fsync_dnode(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << FSYNC_BIT_SHIFT);
+}
+
+static inline unsigned char is_dent_dnode(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << DENT_BIT_SHIFT);
+}
+
+static inline void set_cold_node(struct inode *inode, struct page *page)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(page);
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+
+ if (S_ISDIR(inode->i_mode))
+ flag &= ~(0x1 << COLD_BIT_SHIFT);
+ else
+ flag |= (0x1 << COLD_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
+
+static inline void set_fsync_mark(struct page *page, int mark)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ if (mark)
+ flag |= (0x1 << FSYNC_BIT_SHIFT);
+ else
+ flag &= ~(0x1 << FSYNC_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
+
+static inline void set_dentry_mark(struct page *page, int mark)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ if (mark)
+ flag |= (0x1 << DENT_BIT_SHIFT);
+ else
+ flag &= ~(0x1 << DENT_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
new file mode 100644
index 0000000..cd6268e
--- /dev/null
+++ b/fs/f2fs/segment.h
@@ -0,0 +1,594 @@
+/**
+ * fs/f2fs/segment.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.
+ */
+/* constant macro */
+#define NULL_SEGNO ((unsigned int)(~0))
+#define SUM_TYPE_NODE (1)
+#define SUM_TYPE_DATA (0)
+
+/* V: Logical segment # in volume, R: Relative segment # in main area */
+#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)
+#define GET_R2L_SEGNO(free_i, segno) (segno + free_i->start_segno)
+
+#define IS_DATASEG(t) \
+ ((t == CURSEG_HOT_DATA) || (t == CURSEG_COLD_DATA) || \
+ (t == CURSEG_WARM_DATA))
+
+#define IS_NODESEG(t) \
+ ((t == CURSEG_HOT_NODE) || (t == CURSEG_COLD_NODE) || \
+ (t == CURSEG_WARM_NODE))
+
+#define IS_CURSEG(sbi, segno) \
+ ((segno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
+
+#define IS_CURSEC(sbi, secno) \
+ ((secno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \
+ sbi->segs_per_sec)) \
+
+#define START_BLOCK(sbi, segno) \
+ (SM_I(sbi)->seg0_blkaddr + \
+ (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg))
+#define NEXT_FREE_BLKADDR(sbi, curseg) \
+ (START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff)
+
+#define MAIN_BASE_BLOCK(sbi) (SM_I(sbi)->main_blkaddr)
+
+#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) \
+ ((blk_addr) - SM_I(sbi)->seg0_blkaddr)
+#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \
+ (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
+#define GET_SEGNO(sbi, blk_addr) \
+ (((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ? \
+ NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
+ GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
+#define GET_SECNO(sbi, segno) \
+ ((segno) / sbi->segs_per_sec)
+#define GET_ZONENO_FROM_SEGNO(sbi, segno) \
+ ((segno / sbi->segs_per_sec) / sbi->secs_per_zone)
+
+#define GET_SUM_BLOCK(sbi, segno) \
+ ((sbi->sm_info->ssa_blkaddr) + segno)
+
+#define GET_SUM_TYPE(footer) ((footer)->entry_type)
+#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type)
+
+#define SIT_ENTRY_OFFSET(sit_i, segno) \
+ (segno % sit_i->sents_per_block)
+#define SIT_BLOCK_OFFSET(sit_i, segno) \
+ (segno / SIT_ENTRY_PER_BLOCK)
+#define START_SEGNO(sit_i, segno) \
+ (SIT_BLOCK_OFFSET(sit_i, segno) * SIT_ENTRY_PER_BLOCK)
+#define f2fs_bitmap_size(nr) \
+ (BITS_TO_LONGS(nr) * sizeof(unsigned long))
+#define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segment_count)
+
+enum {
+ LFS = 0,
+ SSR
+};
+
+enum {
+ ALLOC_RIGHT = 0,
+ ALLOC_LEFT
+};
+
+#define SET_SSR_TYPE(type) (((type) + 1) << 16)
+#define GET_SSR_TYPE(type) (((type) >> 16) - 1)
+#define IS_SSR_TYPE(type) ((type) >= (0x1 << 16))
+#define IS_NEXT_SEG(sbi, curseg, type) \
+ (DIRTY_I(sbi)->v_ops->get_victim(sbi, &(curseg)->next_segno, \
+ BG_GC, SET_SSR_TYPE(type)))
+/**
+ * The MSB 6 bits of f2fs_sit_entry->vblocks has segment type,
+ * and LSB 10 bits has valid blocks.
+ */
+#define VBLOCKS_MASK ((1 << 10) - 1)
+
+#define GET_SIT_VBLOCKS(raw_sit) \
+ (le16_to_cpu((raw_sit)->vblocks) & VBLOCKS_MASK)
+#define GET_SIT_TYPE(raw_sit) \
+ ((le16_to_cpu((raw_sit)->vblocks) & ~VBLOCKS_MASK) >> 10)
+
+struct bio_private {
+ struct f2fs_sb_info *sbi;
+ bool is_sync;
+ void *wait;
+};
+
+enum {
+ GC_CB = 0,
+ GC_GREEDY
+};
+
+struct victim_sel_policy {
+ int alloc_mode;
+ int gc_mode;
+ int type;
+ unsigned long *dirty_segmap;
+ unsigned int offset;
+ unsigned int ofs_unit;
+ unsigned int min_cost;
+ unsigned int min_segno;
+};
+
+struct seg_entry {
+ unsigned short valid_blocks;
+ unsigned char *cur_valid_map;
+ unsigned short ckpt_valid_blocks;
+ unsigned char *ckpt_valid_map;
+ unsigned char type;
+ unsigned long long mtime;
+};
+
+struct sec_entry {
+ unsigned int valid_blocks;
+};
+
+struct segment_allocation {
+ void (*allocate_segment)(struct f2fs_sb_info *, int, bool);
+};
+
+struct sit_info {
+ const struct segment_allocation *s_ops;
+
+ block_t sit_base_addr;
+ block_t sit_blocks;
+ block_t written_valid_blocks; /* total number of valid blocks
+ in main area */
+ char *sit_bitmap; /* SIT bitmap pointer */
+ unsigned int bitmap_size;
+
+ unsigned int dirty_sentries; /* # of dirty sentries */
+ unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */
+ unsigned int sents_per_block; /* number of SIT entries
+ per SIT block */
+ struct mutex sentry_lock; /* to protect SIT entries */
+ struct seg_entry *sentries;
+ struct sec_entry *sec_entries;
+
+ unsigned long long elapsed_time;
+ unsigned long long mounted_time;
+ unsigned long long min_mtime;
+ unsigned long long max_mtime;
+};
+
+struct free_segmap_info {
+ unsigned int start_segno;
+ unsigned int free_segments;
+ unsigned int free_sections;
+ rwlock_t segmap_lock; /* free segmap lock */
+ unsigned long *free_segmap;
+ unsigned long *free_secmap;
+};
+
+/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */
+enum dirty_type {
+ DIRTY_HOT_DATA, /* a few valid blocks in a data segment */
+ DIRTY_WARM_DATA,
+ DIRTY_COLD_DATA,
+ DIRTY_HOT_NODE, /* a few valid blocks in a node segment */
+ DIRTY_WARM_NODE,
+ DIRTY_COLD_NODE,
+ DIRTY,
+ PRE, /* no valid blocks in a segment */
+ NR_DIRTY_TYPE
+};
+
+enum {
+ BG_GC,
+ FG_GC
+};
+
+struct dirty_seglist_info {
+ const struct victim_selection *v_ops;
+ struct mutex seglist_lock;
+ unsigned long *dirty_segmap[NR_DIRTY_TYPE];
+ int nr_dirty[NR_DIRTY_TYPE];
+ unsigned long *victim_segmap[2]; /* BG_GC, FG_GC */
+};
+
+struct victim_selection {
+ int (*get_victim)(struct f2fs_sb_info *, unsigned int *, int, int);
+};
+
+struct curseg_info {
+ struct mutex curseg_mutex;
+ struct f2fs_summary_block *sum_blk;
+ unsigned char alloc_type;
+ unsigned int segno;
+ unsigned short next_blkoff;
+ unsigned int zone;
+ unsigned int next_segno;
+};
+
+/**
+ * inline functions
+ */
+static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type)
+{
+ return (struct curseg_info *)(SM_I(sbi)->curseg_array + type);
+}
+
+static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return &sit_i->sentries[segno];
+}
+
+static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return &sit_i->sec_entries[GET_SECNO(sbi, segno)];
+}
+
+static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi,
+ unsigned int segno, int section)
+{
+ if (section > 1)
+ return get_sec_entry(sbi, segno)->valid_blocks;
+ else
+ return get_seg_entry(sbi, segno)->valid_blocks;
+}
+
+static inline void seg_info_from_raw_sit(struct seg_entry *se,
+ struct f2fs_sit_entry *rs)
+{
+ se->valid_blocks = GET_SIT_VBLOCKS(rs);
+ se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs);
+ memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ se->type = GET_SIT_TYPE(rs);
+ se->mtime = le64_to_cpu(rs->mtime);
+}
+
+static inline void seg_info_to_raw_sit(struct seg_entry *se,
+ struct f2fs_sit_entry *rs)
+{
+ unsigned short raw_vblocks = (se->type << 10) | se->valid_blocks;
+ rs->vblocks = cpu_to_le16(raw_vblocks);
+ memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
+ memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ se->ckpt_valid_blocks = se->valid_blocks;
+ rs->mtime = cpu_to_le64(se->mtime);
+}
+
+static inline unsigned int find_next_inuse(struct free_segmap_info *free_i,
+ unsigned int max, unsigned int segno)
+{
+ unsigned int ret;
+ read_lock(&free_i->segmap_lock);
+ ret = find_next_bit(free_i->free_segmap, max, segno);
+ read_unlock(&free_i->segmap_lock);
+ return ret;
+}
+
+static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ unsigned int start_segno = secno * sbi->segs_per_sec;
+ unsigned int next;
+
+ write_lock(&free_i->segmap_lock);
+ clear_bit(segno, free_i->free_segmap);
+ free_i->free_segments++;
+
+ next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi), start_segno);
+ if (next >= start_segno + sbi->segs_per_sec) {
+ clear_bit(secno, free_i->free_secmap);
+ free_i->free_sections++;
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void __set_inuse(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ set_bit(segno, free_i->free_segmap);
+ free_i->free_segments--;
+ if (!test_and_set_bit(secno, free_i->free_secmap))
+ free_i->free_sections--;
+}
+
+static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ unsigned int start_segno = secno * sbi->segs_per_sec;
+ unsigned int next;
+
+ write_lock(&free_i->segmap_lock);
+ if (test_and_clear_bit(segno, free_i->free_segmap)) {
+ free_i->free_segments++;
+
+ next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi),
+ start_segno);
+ if (next >= start_segno + sbi->segs_per_sec) {
+ if (test_and_clear_bit(secno, free_i->free_secmap))
+ free_i->free_sections++;
+ }
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ write_lock(&free_i->segmap_lock);
+ if (!test_and_set_bit(segno, free_i->free_segmap)) {
+ free_i->free_segments--;
+ if (!test_and_set_bit(secno, free_i->free_secmap))
+ free_i->free_sections--;
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
+ void *dst_addr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size);
+}
+
+static inline block_t written_block_count(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ block_t vblocks;
+
+ mutex_lock(&sit_i->sentry_lock);
+ vblocks = sit_i->written_valid_blocks;
+ mutex_unlock(&sit_i->sentry_lock);
+
+ return vblocks;
+}
+
+static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int free_segs;
+
+ read_lock(&free_i->segmap_lock);
+ free_segs = free_i->free_segments;
+ read_unlock(&free_i->segmap_lock);
+
+ return free_segs;
+}
+
+static inline int reserved_segments(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_info *gc_i = sbi->gc_info;
+ return gc_i->rsvd_segment_count;
+}
+
+static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int free_secs;
+
+ read_lock(&free_i->segmap_lock);
+ free_secs = free_i->free_sections;
+ read_unlock(&free_i->segmap_lock);
+
+ return free_secs;
+}
+
+static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
+{
+ return DIRTY_I(sbi)->nr_dirty[PRE];
+}
+
+static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi)
+{
+ return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE];
+}
+
+static inline int overprovision_segments(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_info *gc_i = sbi->gc_info;
+ return gc_i->overp_segment_count;
+}
+
+static inline int overprovision_sections(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_info *gc_i = sbi->gc_info;
+ return ((unsigned int) gc_i->overp_segment_count) / sbi->segs_per_sec;
+}
+
+static inline int reserved_sections(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_info *gc_i = sbi->gc_info;
+ return ((unsigned int) gc_i->rsvd_segment_count) / sbi->segs_per_sec;
+}
+
+static inline bool need_SSR(struct f2fs_sb_info *sbi)
+{
+ return (free_sections(sbi) < overprovision_sections(sbi));
+}
+
+static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi)
+{
+ return free_sections(sbi) <= reserved_sections(sbi);
+}
+
+static inline int utilization(struct f2fs_sb_info *sbi)
+{
+ return (long int)valid_user_blocks(sbi) * 100 /
+ (long int)sbi->user_block_count;
+}
+
+/* Disable In-Place-Update by default */
+#define MIN_IPU_UTIL 100
+static inline bool need_inplace_update(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ if (S_ISDIR(inode->i_mode))
+ return false;
+ if (need_SSR(sbi) && utilization(sbi) > MIN_IPU_UTIL)
+ return true;
+ return false;
+}
+
+static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,
+ int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->segno;
+}
+
+static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi,
+ int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->alloc_type;
+}
+
+static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->next_blkoff;
+}
+
+static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ unsigned int end_segno = SM_I(sbi)->segment_count - 1;
+ BUG_ON(segno > end_segno);
+}
+
+/*
+ * This function is used for only debugging.
+ * NOTE: In future, we have to remove this function.
+ */
+static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
+ block_t start_addr = sm_info->seg0_blkaddr;
+ block_t end_addr = start_addr + total_blks - 1;
+ BUG_ON(blk_addr < start_addr);
+ BUG_ON(blk_addr > end_addr);
+}
+
+/**
+ * Summary block is always treated as invalid block
+ */
+static inline void check_block_count(struct f2fs_sb_info *sbi,
+ int segno, struct f2fs_sit_entry *raw_sit)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ unsigned int end_segno = sm_info->segment_count - 1;
+ int valid_blocks = 0;
+ int i;
+
+ /* check segment usage */
+ BUG_ON(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg);
+
+ /* check boundary of a given segment number */
+ BUG_ON(segno > end_segno);
+
+ /* check bitmap with valid block count */
+ for (i = 0; i < sbi->blocks_per_seg; i++)
+ if (f2fs_test_bit(i, raw_sit->valid_map))
+ valid_blocks++;
+ BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
+}
+
+static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
+ unsigned int start)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int offset = SIT_BLOCK_OFFSET(sit_i, start);
+ block_t blk_addr = sit_i->sit_base_addr + offset;
+
+ check_seg_range(sbi, start);
+
+ /* calculate sit block address */
+ if (f2fs_test_bit(offset, sit_i->sit_bitmap))
+ blk_addr += sit_i->sit_blocks;
+
+ return blk_addr;
+}
+
+static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi,
+ pgoff_t block_addr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ block_addr -= sit_i->sit_base_addr;
+ if (block_addr < sit_i->sit_blocks)
+ block_addr += sit_i->sit_blocks;
+ else
+ block_addr -= sit_i->sit_blocks;
+
+ return block_addr + sit_i->sit_base_addr;
+}
+
+static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start)
+{
+ unsigned int block_off = SIT_BLOCK_OFFSET(sit_i, start);
+
+ if (f2fs_test_bit(block_off, sit_i->sit_bitmap))
+ f2fs_clear_bit(block_off, sit_i->sit_bitmap);
+ else
+ f2fs_set_bit(block_off, sit_i->sit_bitmap);
+}
+
+static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec -
+ sit_i->mounted_time;
+}
+
+static inline void set_summary(struct f2fs_summary *sum, nid_t nid,
+ unsigned int ofs_in_node, unsigned char version)
+{
+ sum->nid = cpu_to_le32(nid);
+ sum->ofs_in_node = cpu_to_le16(ofs_in_node);
+ sum->version = version;
+}
+
+static inline block_t start_sum_block(struct f2fs_sb_info *sbi)
+{
+ return __start_cp_addr(sbi) +
+ le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
+}
+
+static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type)
+{
+ return __start_cp_addr(sbi) +
+ le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count)
+ - (base + 1) + type;
+}
--
1.7.9.5
---
Jaegeuk Kim
Samsung
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