[PATCH 32/76] xfs: enable the rmap btree functionality
From: Darrick J. Wong <hidden>
Date: 2015-12-19 09:00:00
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
From : Dave Chinner [off-list ref]
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 <redacted> --- fs/xfs/libxfs/xfs_format.h | 3 ++- fs/xfs/libxfs/xfs_sb.c | 5 +++++ 2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 2799746..4678831 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h@@ -457,7 +457,8 @@ 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 c9114b7..2590c89 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c@@ -223,6 +223,11 @@ 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.
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