On Fri 16-06-17 19:04:44, Tahsin Erdogan wrote:
> On Thu, Jun 15, 2017 at 2:10 AM, Jan Kara <jack@xxxxxxx> wrote:
> > I agree with moving ext4_xattr_rehash_entry() out of ext4_xattr_rehash().
> > However how about just keeping ext4_xattr_rehash() in
> > ext4_xattr_block_set() (so that you don't have to pass aditional argument
> > to ext4_xattr_set_entry()) and calling ext4_xattr_rehash_entry() when
> > i->value != NULL? That would seem easier and cleaner as well...
>
> The is_block parameter is also used to decide whether block reserve
> check should be performed:
>
> @@ -1500,8 +1502,8 @@ static int ext4_xattr_set_entry(struct ext4_xattr_info *i,
> * attribute block so that a long value does not occupy the
> * whole space and prevent futher entries being added.
> */
> - if (ext4_has_feature_ea_inode(inode->i_sb) && new_size &&
> - (s->end - s->base) == i_blocksize(inode) &&
> + if (ext4_has_feature_ea_inode(inode->i_sb) &&
> + new_size && is_block &&
> (min_offs + old_size - new_size) <
> EXT4_XATTR_BLOCK_RESERVE(inode)) {
> ret = -ENOSPC;
>
> Because of that, I think moving ext4_xattr_rehash to caller makes it
> bit more complicated. Let me know if you disagree.
What I dislike is the leakage of information about particular type of
storage into ext4_xattr_set_entry(). However I agree that it would be
cumbersome to handle this reservation check differently so ok.
Honza
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
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