Add the reflink feature flag to the set of recognized feature flags.
This enables users to write to reflink filesystems.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_format.h | 3 ++-
fs/xfs/libxfs/xfs_sb.c | 5 +++++
fs/xfs/xfs_super.c | 3 +++
3 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 7482531..ab0341f 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -459,7 +459,8 @@ xfs_sb_has_compat_feature(
#define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */
#define XFS_SB_FEAT_RO_COMPAT_ALL \
(XFS_SB_FEAT_RO_COMPAT_FINOBT | \
- XFS_SB_FEAT_RO_COMPAT_RMAPBT)
+ XFS_SB_FEAT_RO_COMPAT_RMAPBT | \
+ XFS_SB_FEAT_RO_COMPAT_REFLINK)
#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 c195ea7..a99eb01 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -230,6 +230,11 @@ xfs_mount_validate_sb(
"EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
}
+ if (xfs_sb_version_hasreflink(sbp)) {
+ xfs_alert(mp,
+"EXPERIMENTAL reflink feature enabled. Use at your own risk!");
+ }
+
/*
* More sanity checking. Most of these were stolen directly from
* xfs_repair.
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 36df40b..ede714b 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1536,6 +1536,9 @@ xfs_fs_fill_super(
"Block device does not support DAX Turning DAX off.");
mp->m_flags &= ~XFS_MOUNT_DAX;
}
+ if (xfs_sb_version_hasreflink(&mp->m_sb))
+ xfs_alert(mp,
+ "DAX and reflink have not been tested together!");
}
if (xfs_sb_version_hassparseinodes(&mp->m_sb))
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