diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-09-01 11:19:48 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-09-17 18:55:26 -0700 |
| commit | 3acc2fc25086121aca267f1622a790fa660dd978 (patch) | |
| tree | 768ee8d1fcff5a5a376a8a1249df9f5ea4ae5723 | |
| parent | a710612f93d558c3f36694bfcc42b0b5fffac186 (diff) | |
xfs: enable realtime reflinkrealtime-reflink_2021-09-17
Enable reflink for realtime devices, sort of.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
| -rw-r--r-- | fs/xfs/xfs_super.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 37a6a8bcdb94..a70862935988 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1681,14 +1681,27 @@ xfs_fs_fill_super( "EXPERIMENTAL metadata directory feature in use. Use at your own risk!"); if (xfs_has_reflink(mp)) { - if (mp->m_sb.sb_rblocks) { + /* + * Reflink doesn't support rt extent sizes larger than a single + * block because we would have to perform unshare-around for + * rtext-unaligned write requests. + */ + if (xfs_has_realtime(mp) && mp->m_sb.sb_rextsize != 1) { xfs_alert(mp, - "reflink not compatible with realtime device!"); + "reflink not compatible with realtime extent size %u!", + mp->m_sb.sb_rextsize); error = -EINVAL; goto out_filestream_unmount; } - if (xfs_globals.always_cow) { + /* + * always-cow mode is not supported on filesystems with rt + * extent sizes larger than a single block because we'd have + * to perform write-around for unaligned writes because remap + * requests must be aligned to an rt extent. + */ + if (xfs_globals.always_cow && + (!xfs_has_realtime(mp) || mp->m_sb.sb_rextsize == 1)) { xfs_info(mp, "using DEBUG-only always_cow mode."); mp->m_always_cow = true; } |