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f2fs: reuse find_in_block code for find_in_inline_dir 

This patch removes redundant copied code in find_in_inline_dir.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2014-10-13 17:26:14 -07:00
parent a82afa2019
commit 4e6ebf6d49
3 changed files with 65 additions and 63 deletions
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73
fs/f2fs/dir.c
View File

@ -77,7 +77,7 @@ static unsigned long dir_block_index(unsigned int level,
return bidx;
}
bool early_match_name(size_t namelen, f2fs_hash_t namehash,
static bool early_match_name(size_t namelen, f2fs_hash_t namehash,
struct f2fs_dir_entry *de)
{
if (le16_to_cpu(de->name_len) != namelen)
@ -90,49 +90,69 @@ bool early_match_name(size_t namelen, f2fs_hash_t namehash,
}
static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
struct qstr *name, int *max_slots,
f2fs_hash_t namehash, struct page **res_page)
struct qstr *name, int *max_slots,
struct page **res_page)
{
struct f2fs_dentry_block *dentry_blk;
struct f2fs_dir_entry *de;
*max_slots = NR_DENTRY_IN_BLOCK;
dentry_blk = (struct f2fs_dentry_block *)kmap(dentry_page);
de = find_target_dentry(name, max_slots, &dentry_blk->dentry_bitmap,
dentry_blk->dentry,
dentry_blk->filename);
if (de)
*res_page = dentry_page;
else
kunmap(dentry_page);
/*
* For the most part, it should be a bug when name_len is zero.
* We stop here for figuring out where the bugs has occurred.
*/
f2fs_bug_on(F2FS_P_SB(dentry_page), *max_slots < 0);
return de;
}
struct f2fs_dir_entry *find_target_dentry(struct qstr *name, int *max_slots,
const void *bitmap, struct f2fs_dir_entry *dentry,
__u8 (*filenames)[F2FS_SLOT_LEN])
{
struct f2fs_dir_entry *de;
unsigned long bit_pos = 0;
struct f2fs_dentry_block *dentry_blk = kmap(dentry_page);
const void *dentry_bits = &dentry_blk->dentry_bitmap;
f2fs_hash_t namehash = f2fs_dentry_hash(name);
int max_bits = *max_slots;
int max_len = 0;
while (bit_pos < NR_DENTRY_IN_BLOCK) {
if (!test_bit_le(bit_pos, dentry_bits)) {
*max_slots = 0;
while (bit_pos < max_bits) {
if (!test_bit_le(bit_pos, bitmap)) {
if (bit_pos == 0)
max_len = 1;
else if (!test_bit_le(bit_pos - 1, dentry_bits))
else if (!test_bit_le(bit_pos - 1, bitmap))
max_len++;
bit_pos++;
continue;
}
de = &dentry_blk->dentry[bit_pos];
if (early_match_name(name->len, namehash, de)) {
if (!memcmp(dentry_blk->filename[bit_pos],
name->name,
name->len)) {
*res_page = dentry_page;
goto found;
}
}
if (max_len > *max_slots) {
de = &dentry[bit_pos];
if (early_match_name(name->len, namehash, de) &&
!memcmp(filenames[bit_pos], name->name, name->len))
goto found;
if (*max_slots >= 0 && max_len > *max_slots) {
*max_slots = max_len;
max_len = 0;
}
/*
* For the most part, it should be a bug when name_len is zero.
* We stop here for figuring out where the bugs has occurred.
*/
f2fs_bug_on(F2FS_P_SB(dentry_page), !de->name_len);
/* remain bug on condition */
if (unlikely(!de->name_len))
*max_slots = -1;
bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
}
de = NULL;
kunmap(dentry_page);
found:
if (max_len > *max_slots)
*max_slots = max_len;
@ -149,7 +169,7 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
struct page *dentry_page;
struct f2fs_dir_entry *de = NULL;
bool room = false;
int max_slots = 0;
int max_slots;
f2fs_bug_on(F2FS_I_SB(dir), level > MAX_DIR_HASH_DEPTH);
@ -168,8 +188,7 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
continue;
}
de = find_in_block(dentry_page, name, &max_slots,
namehash, res_page);
de = find_in_block(dentry_page, name, &max_slots, res_page);
if (de)
break;

3
fs/f2fs/f2fs.h
View File

@ -1243,8 +1243,9 @@ struct dentry *f2fs_get_parent(struct dentry *child);
* dir.c
*/
extern unsigned char f2fs_filetype_table[F2FS_FT_MAX];
bool early_match_name(size_t, f2fs_hash_t, struct f2fs_dir_entry *);
void set_de_type(struct f2fs_dir_entry *, struct inode *);
struct f2fs_dir_entry *find_target_dentry(struct qstr *, int *, const void *,
struct f2fs_dir_entry *, __u8 (*)[F2FS_SLOT_LEN]);
struct page *init_inode_metadata(struct inode *, struct inode *,
const struct qstr *);
void update_parent_metadata(struct inode *, struct inode *, unsigned int);

52
fs/f2fs/inline.c
View File

@ -263,49 +263,31 @@ struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
struct qstr *name, struct page **res_page)
{
struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct page *ipage;
struct f2fs_inline_dentry *inline_dentry;
struct f2fs_dir_entry *de;
f2fs_hash_t namehash;
unsigned long bit_pos = 0;
struct f2fs_inline_dentry *dentry_blk;
const void *dentry_bits;
struct page *ipage;
int max_slots = NR_INLINE_DENTRY;
ipage = get_node_page(sbi, dir->i_ino);
if (IS_ERR(ipage))
return NULL;
namehash = f2fs_dentry_hash(name);
inline_dentry = inline_data_addr(ipage);
dentry_blk = inline_data_addr(ipage);
dentry_bits = &dentry_blk->dentry_bitmap;
while (bit_pos < NR_INLINE_DENTRY) {
if (!test_bit_le(bit_pos, dentry_bits)) {
bit_pos++;
continue;
}
de = &dentry_blk->dentry[bit_pos];
if (early_match_name(name->len, namehash, de)) {
if (!memcmp(dentry_blk->filename[bit_pos],
name->name,
name->len)) {
*res_page = ipage;
goto found;
}
}
/*
* For the most part, it should be a bug when name_len is zero.
* We stop here for figuring out where the bugs are occurred.
*/
f2fs_bug_on(F2FS_P_SB(ipage), !de->name_len);
bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
}
de = NULL;
found:
de = find_target_dentry(name, &max_slots, &inline_dentry->dentry_bitmap,
inline_dentry->dentry,
inline_dentry->filename);
unlock_page(ipage);
if (de)
*res_page = ipage;
else
f2fs_put_page(ipage, 0);
/*
* For the most part, it should be a bug when name_len is zero.
* We stop here for figuring out where the bugs has occurred.
*/
f2fs_bug_on(sbi, max_slots < 0);
return de;
}