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;
}
/*
* this function does not take xattr_sem, which is OK because it is
* currently only used in a code path coming form ext4_iget, before
* the new inode has been unlocked
*/
int ext4_find_inline_data_nolock(struct inode *inode)
{
struct ext4_xattr_ibody_find is = {
.s = { .not_found = -ENODATA, },
};
struct ext4_xattr_info i = {
.name_index = EXT4_XATTR_INDEX_SYSTEM,
.name = EXT4_XATTR_SYSTEM_DATA,
};
int error;
if (EXT4_I(inode)->i_extra_isize == 0)
return 0;
error = ext4_get_inode_loc(inode, &is.iloc);
if (error)
return error;
error = ext4_xattr_ibody_find(inode, &i, &is);
if (error)
goto out;
if (!is.s.not_found) {
if (is.s.here->e_value_inum) {
EXT4_ERROR_INODE(inode, "inline data xattr refers "
"to an external xattr inode");
error = -EFSCORRUPTED;
goto out;
}
EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
(void *)ext4_raw_inode(&is.iloc));
EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
le32_to_cpu(is.s.here->e_value_size);
ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
}
out:
brelse(is.iloc.bh);
return error;
}
