On Tue, Feb 04, 2014 at 12:49:33PM -0500, Brian Foster wrote: > Reserve a v5 read-only compatibility feature bit for the finobt and > create the xfs_sb_version_hasfinobt() helper to determine whether > an fs has the feature enabled. > > The finobt does not change existing on-disk structures, but must > remain consistent with the ialloc btree. Modifications from older > kernels would violate that constrant. Therefore, we restrict older > kernels to read-only mounts of finobt-enabled filesystems. > > Note that this does not yet enable the ability to rw mount a finobt > fs (by setting the feature bit in the XFS_SB_FEAT_RO_COMPAT_ALL > mask). > > Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx> Looks good. Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx> -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
