On Tue, Dec 03, 2013 at 02:30:26PM -0800, Darrick J. Wong wrote:
[...]
> > + * notify users that inline data will never be useful.
> > + */
> > + if ((fs_param.s_feature_incompat &
> > + EXT4_FEATURE_INCOMPAT_INLINE_DATA) &&
> > + inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
>
> Perhaps I'm missing something here, but why is it impossible to use i_blocks
> for inline data even if there's no space for EAs?
If I understand correctly, on kernel side, we determine an inode has
inline data according to whether we have 'system.data' xattr entry on
inode extended attribute space. If an inode doesn't have enough space
to store an entry with 'system.data', we just think this inode doesn't
has inline data. So that is why I add this sanity check.
Regards,
- Zheng
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