| To: | Brian Foster <bfoster@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [PATCH v3 02/11] xfs: reserve v5 superblock read-only compat. feature bit for finobt |
| From: | Dave Chinner <david@xxxxxxxxxxxxx> |
| Date: | Tue, 11 Feb 2014 17:07:37 +1100 |
| Cc: | xfs@xxxxxxxxxxx |
| Delivered-to: | xfs@xxxxxxxxxxx |
| In-reply-to: | <1391536182-9048-3-git-send-email-bfoster@xxxxxxxxxx> |
| References: | <1391536182-9048-1-git-send-email-bfoster@xxxxxxxxxx> <1391536182-9048-3-git-send-email-bfoster@xxxxxxxxxx> |
| User-agent: | Mutt/1.5.21 (2010-09-15) |
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 |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | [ANNOUNCE] xfs-documentation: master branch updated to 8421062, Dave Chinner |
|---|---|
| Next by Date: | Re: [PATCH v3 03/11] xfs: support the XFS_BTNUM_FINOBT free inode btree type, Dave Chinner |
| Previous by Thread: | [PATCH v3 02/11] xfs: reserve v5 superblock read-only compat. feature bit for finobt, Brian Foster |
| Next by Thread: | [PATCH v3 06/11] xfs: use and update the finobt on inode allocation, Brian Foster |
| Indexes: | [Date] [Thread] [Top] [All Lists] |