ext4: let empty_dir handle inline dir

empty_dir is used when deleting a dir.  So it should handle inline dir
properly.

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 14:06:01 -05:00 committed by Theodore Ts'o
parent 9f40fe5463
commit 61f86638d8
3 changed files with 104 additions and 0 deletions

View File

@ -1565,6 +1565,96 @@ out:
return err;
}
/*
* Get the inline dentry at offset.
*/
static inline struct ext4_dir_entry_2 *
ext4_get_inline_entry(struct inode *inode,
struct ext4_iloc *iloc,
unsigned int offset,
void **inline_start,
int *inline_size)
{
void *inline_pos;
BUG_ON(offset > ext4_get_inline_size(inode));
if (offset < EXT4_MIN_INLINE_DATA_SIZE) {
inline_pos = (void *)ext4_raw_inode(iloc)->i_block;
*inline_size = EXT4_MIN_INLINE_DATA_SIZE;
} else {
inline_pos = ext4_get_inline_xattr_pos(inode, iloc);
offset -= EXT4_MIN_INLINE_DATA_SIZE;
*inline_size = ext4_get_inline_size(inode) -
EXT4_MIN_INLINE_DATA_SIZE;
}
if (inline_start)
*inline_start = inline_pos;
return (struct ext4_dir_entry_2 *)(inline_pos + offset);
}
int empty_inline_dir(struct inode *dir, int *has_inline_data)
{
int err, inline_size;
struct ext4_iloc iloc;
void *inline_pos;
unsigned int offset;
struct ext4_dir_entry_2 *de;
int ret = 1;
err = ext4_get_inode_loc(dir, &iloc);
if (err) {
EXT4_ERROR_INODE(dir, "error %d getting inode %lu block",
err, dir->i_ino);
return 1;
}
down_read(&EXT4_I(dir)->xattr_sem);
if (!ext4_has_inline_data(dir)) {
*has_inline_data = 0;
goto out;
}
de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
if (!le32_to_cpu(de->inode)) {
ext4_warning(dir->i_sb,
"bad inline directory (dir #%lu) - no `..'",
dir->i_ino);
ret = 1;
goto out;
}
offset = EXT4_INLINE_DOTDOT_SIZE;
while (offset < dir->i_size) {
de = ext4_get_inline_entry(dir, &iloc, offset,
&inline_pos, &inline_size);
if (ext4_check_dir_entry(dir, NULL, de,
iloc.bh, inline_pos,
inline_size, offset)) {
ext4_warning(dir->i_sb,
"bad inline directory (dir #%lu) - "
"inode %u, rec_len %u, name_len %d"
"inline size %d\n",
dir->i_ino, le32_to_cpu(de->inode),
le16_to_cpu(de->rec_len), de->name_len,
inline_size);
ret = 1;
goto out;
}
if (le32_to_cpu(de->inode)) {
ret = 0;
goto out;
}
offset += ext4_rec_len_from_disk(de->rec_len, inline_size);
}
out:
up_read(&EXT4_I(dir)->xattr_sem);
brelse(iloc.bh);
return ret;
}
int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
{
int ret;

View File

@ -2464,6 +2464,14 @@ static int empty_dir(struct inode *inode)
struct super_block *sb;
int err = 0;
if (ext4_has_inline_data(inode)) {
int has_inline_data = 1;
err = empty_inline_dir(inode, &has_inline_data);
if (has_inline_data)
return err;
}
sb = inode->i_sb;
if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
!(bh = ext4_bread(NULL, inode, 0, 0, &err))) {

View File

@ -180,6 +180,7 @@ extern int ext4_delete_inline_entry(handle_t *handle,
struct ext4_dir_entry_2 *de_del,
struct buffer_head *bh,
int *has_inline_data);
extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
# else /* CONFIG_EXT4_FS_XATTR */
static inline int
@ -381,6 +382,11 @@ static inline int ext4_delete_inline_entry(handle_t *handle,
{
return 0;
}
static inline int empty_inline_dir(struct inode *dir, int *has_inline_data)
{
return 0;
}
# endif /* CONFIG_EXT4_FS_XATTR */
#ifdef CONFIG_EXT4_FS_SECURITY