[28/58] xfs: enable the rmap btree functionality
diff mbox

Message ID 20151007045812.30457.69230.stgit@birch.djwong.org
State New
Headers show

Commit Message

Darrick J. Wong Oct. 7, 2015, 4:58 a.m. UTC
>From : Dave Chinner <dchinner@redhat.com>

Add the feature flag to the supported matrix so that the kernel can
mount and use rmap btree enabled filesystems

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 fs/xfs/libxfs/xfs_format.h |    3 ++-
 fs/xfs/libxfs/xfs_sb.c     |    5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)



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Patch
diff mbox

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index f0cf383..c4a73e9 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -449,7 +449,8 @@  xfs_sb_has_compat_feature(
 #define XFS_SB_FEAT_RO_COMPAT_FINOBT   (1 << 0)		/* free inode btree */
 #define XFS_SB_FEAT_RO_COMPAT_RMAPBT   (1 << 1)		/* reverse map btree */
 #define XFS_SB_FEAT_RO_COMPAT_ALL \
-		(XFS_SB_FEAT_RO_COMPAT_FINOBT)
+		(XFS_SB_FEAT_RO_COMPAT_FINOBT | \
+		 XFS_SB_FEAT_RO_COMPAT_RMAPBT)
 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN	~XFS_SB_FEAT_RO_COMPAT_ALL
 static inline bool
 xfs_sb_has_ro_compat_feature(
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 0103a75..8b437f5 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -213,6 +213,11 @@  xfs_mount_validate_sb(
 		return -EINVAL;
 	}
 
+	if (xfs_sb_version_hasrmapbt(sbp)) {
+		xfs_alert(mp,
+"EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
+	}
+
 	/*
 	 * More sanity checking.  Most of these were stolen directly from
 	 * xfs_repair.