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ext4: let ext4_find_entry handle inline data

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Create a new function ext4_find_inline_entry() to handle the case of
inline data.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Tao Ma 2012-12-10 14:06:00 -05:00 committed by Theodore Ts'o
parent 7335cd3b41
commit e8e948e780
3 changed files with 70 additions and 1 deletions
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48
fs/ext4/inline.c
View File

@ -1462,6 +1462,54 @@ out:
return ret;
}
struct buffer_head *ext4_find_inline_entry(struct inode *dir,
const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir,
int *has_inline_data)
{
int ret;
struct ext4_iloc iloc;
void *inline_start;
int inline_size;
if (ext4_get_inode_loc(dir, &iloc))
return NULL;
down_read(&EXT4_I(dir)->xattr_sem);
if (!ext4_has_inline_data(dir)) {
*has_inline_data = 0;
goto out;
}
inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
EXT4_INLINE_DOTDOT_SIZE;
inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
ret = search_dir(iloc.bh, inline_start, inline_size,
dir, d_name, 0, res_dir);
if (ret == 1)
goto out_find;
if (ret < 0)
goto out;
if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE)
goto out;
inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE;
ret = search_dir(iloc.bh, inline_start, inline_size,
dir, d_name, 0, res_dir);
if (ret == 1)
goto out_find;
out:
brelse(iloc.bh);
iloc.bh = NULL;
out_find:
up_read(&EXT4_I(dir)->xattr_sem);
return iloc.bh;
}
int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
{
int ret;

10
fs/ext4/namei.c
View File

@ -1015,7 +1015,6 @@ static inline int search_dirblock(struct buffer_head *bh,
d_name, offset, res_dir);
}
/*
* Directory block splitting, compacting
*/
@ -1198,6 +1197,15 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
namelen = d_name->len;
if (namelen > EXT4_NAME_LEN)
return NULL;
if (ext4_has_inline_data(dir)) {
int has_inline_data = 1;
ret = ext4_find_inline_entry(dir, d_name, res_dir,
&has_inline_data);
if (has_inline_data)
return ret;
}
if ((namelen <= 2) && (name[0] == '.') &&
(name[1] == '.' || name[1] == '\0')) {
/*

13
fs/ext4/xattr.h
View File

@ -171,6 +171,10 @@ extern int ext4_try_create_inline_dir(handle_t *handle,
extern int ext4_read_inline_dir(struct file *filp,
void *dirent, filldir_t filldir,
int *has_inline_data);
extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir,
int *has_inline_data);
# else /* CONFIG_EXT4_FS_XATTR */
static inline int
@ -355,6 +359,15 @@ static inline int ext4_read_inline_dir(struct file *filp,
{
return 0;
}
static inline struct buffer_head *
ext4_find_inline_entry(struct inode *dir,
const struct qstr *d_name,
struct ext4_dir_entry_2 **res_dir,
int *has_inline_data)
{
return NULL;
}
# endif /* CONFIG_EXT4_FS_XATTR */
#ifdef CONFIG_EXT4_FS_SECURITY