static int get_max_inline_xattr_value_size(struct inode *inode,
struct ext4_iloc *iloc)
{
struct ext4_xattr_ibody_header *header;
struct ext4_xattr_entry *entry;
struct ext4_inode *raw_inode;
int free, min_offs;
min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
EXT4_GOOD_OLD_INODE_SIZE -
EXT4_I(inode)->i_extra_isize -
sizeof(struct ext4_xattr_ibody_header);
/*
* We need to subtract another sizeof(__u32) since an in-inode xattr
* needs an empty 4 bytes to indicate the gap between the xattr entry
* and the name/value pair.
*/
if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
return EXT4_XATTR_SIZE(min_offs -
EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) -
EXT4_XATTR_ROUND - sizeof(__u32));
raw_inode = ext4_raw_inode(iloc);
header = IHDR(inode, raw_inode);
entry = IFIRST(header);
/* Compute min_offs. */
for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
if (!entry->e_value_block && entry->e_value_size) {
size_t offs = le16_to_cpu(entry->e_value_offs);
if (offs < min_offs)
min_offs = offs;
}
}
free = min_offs -
((void *)entry - (void *)IFIRST(header)) - sizeof(__u32);
if (EXT4_I(inode)->i_inline_off) {
entry = (struct ext4_xattr_entry *)
((void *)raw_inode + EXT4_I(inode)->i_inline_off);
free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size));
goto out;
}
free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA));
if (free > EXT4_XATTR_ROUND)
free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND);
else
free = 0;
out:
return free;
}
static int get_max_inline_xattr_value_size(struct inode *inode,
struct ext4_iloc *iloc)
{
struct ext4_xattr_ibody_header *header;
struct ext4_xattr_entry *entry;
struct ext4_inode *raw_inode;
int free, min_offs;
if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
return EXT4_XATTR_SIZE(EXT4_SB(inode->i_sb)->s_inode_size -
EXT4_GOOD_OLD_INODE_SIZE -
EXT4_I(inode)->i_extra_isize -
sizeof(struct ext4_xattr_ibody_header) -
EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA_NAME)) -
EXT4_XATTR_ROUND - sizeof(__u32));
down_read(&EXT4_I(inode)->xattr_sem);
raw_inode = ext4_raw_inode(iloc);
header = IHDR(inode, raw_inode);
entry = IFIRST(header);
min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
EXT4_GOOD_OLD_INODE_SIZE -
EXT4_I(inode)->i_extra_isize -
sizeof(struct ext4_xattr_ibody_header);
/* Compute min_offs. */
for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
if (!entry->e_value_block && entry->e_value_size) {
size_t offs = le16_to_cpu(entry->e_value_offs);
if (offs < min_offs)
min_offs = offs;
}
}
free = min_offs -
((void *)entry - (void *)IFIRST(header)) - sizeof(__u32);
if (EXT4_I(inode)->i_inline_off) {
entry = (struct ext4_xattr_entry *)
((void *)raw_inode + EXT4_I(inode)->i_inline_off);
free += le32_to_cpu(entry->e_value_size);
goto out;
}
free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA_NAME));
if (free > EXT4_XATTR_ROUND)
free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND);
else
free = 0;
out:
up_read(&EXT4_I(inode)->xattr_sem);
return free;
}
