Commit e54b5bf9 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: recognize the reflink feature bit 



Add the reflink feature flag to the set of recognized feature flags.
This enables users to write to reflink filesystems.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent a35eb415

fs/xfs/libxfs/xfs_format.h

+2 −1
Original line number Diff line number Diff line
@@ -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(

fs/xfs/xfs_super.c

+7 −0
Original line number Diff line number Diff line
@@ -1614,6 +1614,9 @@ xfs_fs_fill_super( 
			"DAX unsupported by block device. Turning off DAX.");

			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_hasrmapbt(&mp->m_sb)) {
@@ -1627,6 +1630,10 @@ xfs_fs_fill_super( 
	"EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");

	}



	if (xfs_sb_version_hasreflink(&mp->m_sb))

		xfs_alert(mp,

	"EXPERIMENTAL reflink feature enabled. Use at your own risk!");



	error = xfs_mountfs(mp);

	if (error)

		goto out_filestream_unmount;