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f2fs: introduce struct inode_management to wrap inner fields

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Now in f2fs, we have three inode cache: ORPHAN_INO, APPEND_INO, UPDATE_INO,
and we manage fields related to inode cache separately in struct f2fs_sb_info
for each inode cache type.
This makes codes a bit messy, so that this patch intorduce a new struct
inode_management to wrap inner fields as following which make codes more neat.

/* 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 */
};

struct f2fs_sb_info {
	...
	struct inode_management im[MAX_INO_ENTRY];      /* manage inode cache */
	...
}

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2014-11-18 11:18:36 +08:00 committed by Jaegeuk Kim
parent aba291b3d8
commit 67298804f3
4 changed files with 66 additions and 49 deletions
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95
fs/f2fs/checkpoint.c
View File

@ -298,47 +298,49 @@ const struct address_space_operations f2fs_meta_aops = {
static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
struct inode_management *im = &sbi->im[type];
struct ino_entry *e;
retry:
spin_lock(&sbi->ino_lock[type]);
spin_lock(&im->ino_lock);
e = radix_tree_lookup(&sbi->ino_root[type], ino);
e = radix_tree_lookup(&im->ino_root, ino);
if (!e) {
e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
if (!e) {
spin_unlock(&sbi->ino_lock[type]);
spin_unlock(&im->ino_lock);
goto retry;
}
if (radix_tree_insert(&sbi->ino_root[type], ino, e)) {
spin_unlock(&sbi->ino_lock[type]);
if (radix_tree_insert(&im->ino_root, ino, e)) {
spin_unlock(&im->ino_lock);
kmem_cache_free(ino_entry_slab, e);
goto retry;
}
memset(e, 0, sizeof(struct ino_entry));
e->ino = ino;
list_add_tail(&e->list, &sbi->ino_list[type]);
list_add_tail(&e->list, &im->ino_list);
if (type != ORPHAN_INO)
sbi->ino_num[type]++;
im->ino_num++;
}
spin_unlock(&sbi->ino_lock[type]);
spin_unlock(&im->ino_lock);
}
static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
{
struct inode_management *im = &sbi->im[type];
struct ino_entry *e;
spin_lock(&sbi->ino_lock[type]);
e = radix_tree_lookup(&sbi->ino_root[type], ino);
spin_lock(&im->ino_lock);
e = radix_tree_lookup(&im->ino_root, ino);
if (e) {
list_del(&e->list);
radix_tree_delete(&sbi->ino_root[type], ino);
sbi->ino_num[type]--;
spin_unlock(&sbi->ino_lock[type]);
radix_tree_delete(&im->ino_root, ino);
im->ino_num--;
spin_unlock(&im->ino_lock);
kmem_cache_free(ino_entry_slab, e);
return;
}
spin_unlock(&sbi->ino_lock[type]);
spin_unlock(&im->ino_lock);
}
void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
@ -356,10 +358,12 @@ void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
/* mode should be APPEND_INO or UPDATE_INO */
bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
{
struct inode_management *im = &sbi->im[mode];
struct ino_entry *e;
spin_lock(&sbi->ino_lock[mode]);
e = radix_tree_lookup(&sbi->ino_root[mode], ino);
spin_unlock(&sbi->ino_lock[mode]);
spin_lock(&im->ino_lock);
e = radix_tree_lookup(&im->ino_root, ino);
spin_unlock(&im->ino_lock);
return e ? true : false;
}
@ -369,37 +373,42 @@ void release_dirty_inode(struct f2fs_sb_info *sbi)
int i;
for (i = APPEND_INO; i <= UPDATE_INO; i++) {
spin_lock(&sbi->ino_lock[i]);
list_for_each_entry_safe(e, tmp, &sbi->ino_list[i], list) {
struct inode_management *im = &sbi->im[i];
spin_lock(&im->ino_lock);
list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
list_del(&e->list);
radix_tree_delete(&sbi->ino_root[i], e->ino);
radix_tree_delete(&im->ino_root, e->ino);
kmem_cache_free(ino_entry_slab, e);
sbi->ino_num[i]--;
im->ino_num--;
}
spin_unlock(&sbi->ino_lock[i]);
spin_unlock(&im->ino_lock);
}
}
int acquire_orphan_inode(struct f2fs_sb_info *sbi)
{
struct inode_management *im = &sbi->im[ORPHAN_INO];
int err = 0;
spin_lock(&sbi->ino_lock[ORPHAN_INO]);
if (unlikely(sbi->ino_num[ORPHAN_INO] >= sbi->max_orphans))
spin_lock(&im->ino_lock);
if (unlikely(im->ino_num >= sbi->max_orphans))
err = -ENOSPC;
else
sbi->ino_num[ORPHAN_INO]++;
spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
im->ino_num++;
spin_unlock(&im->ino_lock);
return err;
}
void release_orphan_inode(struct f2fs_sb_info *sbi)
{
spin_lock(&sbi->ino_lock[ORPHAN_INO]);
f2fs_bug_on(sbi, sbi->ino_num[ORPHAN_INO] == 0);
sbi->ino_num[ORPHAN_INO]--;
spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
struct inode_management *im = &sbi->im[ORPHAN_INO];
spin_lock(&im->ino_lock);
f2fs_bug_on(sbi, im->ino_num == 0);
im->ino_num--;
spin_unlock(&im->ino_lock);
}
void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
@ -465,15 +474,16 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
unsigned short orphan_blocks;
struct page *page = NULL;
struct ino_entry *orphan = NULL;
struct inode_management *im = &sbi->im[ORPHAN_INO];
orphan_blocks = GET_ORPHAN_BLOCKS(sbi->ino_num[ORPHAN_INO]);
orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
for (index = 0; index < orphan_blocks; index++)
grab_meta_page(sbi, start_blk + index);
index = 1;
spin_lock(&sbi->ino_lock[ORPHAN_INO]);
head = &sbi->ino_list[ORPHAN_INO];
spin_lock(&im->ino_lock);
head = &im->ino_list;
/* loop for each orphan inode entry and write them in Jornal block */
list_for_each_entry(orphan, head, list) {
@ -513,7 +523,7 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
f2fs_put_page(page, 1);
}
spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
spin_unlock(&im->ino_lock);
}
static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
@ -836,6 +846,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
struct f2fs_nm_info *nm_i = NM_I(sbi);
unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
nid_t last_nid = nm_i->next_scan_nid;
block_t start_blk;
struct page *cp_page;
@ -895,7 +906,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
else
clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
orphan_blocks = GET_ORPHAN_BLOCKS(sbi->ino_num[ORPHAN_INO]);
orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
orphan_blocks);
@ -911,7 +922,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
orphan_blocks);
}
if (sbi->ino_num[ORPHAN_INO])
if (orphan_num)
set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
else
clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
@ -946,7 +957,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
f2fs_put_page(cp_page, 1);
}
if (sbi->ino_num[ORPHAN_INO]) {
if (orphan_num) {
write_orphan_inodes(sbi, start_blk);
start_blk += orphan_blocks;
}
@ -1045,10 +1056,12 @@ void init_ino_entry_info(struct f2fs_sb_info *sbi)
int i;
for (i = 0; i < MAX_INO_ENTRY; i++) {
INIT_RADIX_TREE(&sbi->ino_root[i], GFP_ATOMIC);
spin_lock_init(&sbi->ino_lock[i]);
INIT_LIST_HEAD(&sbi->ino_list[i]);
sbi->ino_num[i] = 0;
struct inode_management *im = &sbi->im[i];
INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
spin_lock_init(&im->ino_lock);
INIT_LIST_HEAD(&im->ino_list);
im->ino_num = 0;
}
/*

2
fs/f2fs/debug.c
View File

@ -171,7 +171,7 @@ get_cache:
si->cache_mem += npages << PAGE_CACHE_SHIFT;
si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry);
for (i = 0; i <= UPDATE_INO; i++)
si->cache_mem += sbi->ino_num[i] * sizeof(struct ino_entry);
si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
}
static int stat_show(struct seq_file *s, void *v)

14
fs/f2fs/f2fs.h
View File

@ -499,6 +499,14 @@ struct f2fs_bio_info {
struct rw_semaphore io_rwsem; /* blocking op for bio */
};
/* 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 */
};
struct f2fs_sb_info {
struct super_block *sb; /* pointer to VFS super block */
struct proc_dir_entry *s_proc; /* proc entry */
@ -528,11 +536,7 @@ struct f2fs_sb_info {
bool por_doing; /* recovery is doing or not */
wait_queue_head_t cp_wait;
/* for inode management */
struct radix_tree_root ino_root[MAX_INO_ENTRY]; /* ino entry array */
spinlock_t ino_lock[MAX_INO_ENTRY]; /* for ino entry lock */
struct list_head ino_list[MAX_INO_ENTRY]; /* inode list head */
unsigned long ino_num[MAX_INO_ENTRY]; /* number of entries */
struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
/* for orphan inode, use 0'th array */
unsigned int max_orphans; /* max orphan inodes */

4
fs/f2fs/node.c
View File

@ -60,8 +60,8 @@ bool available_free_memory(struct f2fs_sb_info *sbi, int type)
if (sbi->sb->s_bdi->dirty_exceeded)
return false;
for (i = 0; i <= UPDATE_INO; i++)
mem_size += (sbi->ino_num[i] * sizeof(struct ino_entry))
>> PAGE_CACHE_SHIFT;
mem_size += (sbi->im[i].ino_num *
sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT;
res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
}
return res;