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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-03 18:11:50 +0200 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-06 01:26:31 +0200 |
| commit | 4f435ebe7d0422af61cdcddbbcc659888645a1e1 (patch) | |
| tree | 49f6833f8b5b9e71c2df1b540fcbe933dfcd7087 /fs | |
| parent | xfs: check for invalid inode reflink flags (diff) | |
| download | linux-4f435ebe7d0422af61cdcddbbcc659888645a1e1.tar.xz linux-4f435ebe7d0422af61cdcddbbcc659888645a1e1.zip | |
xfs: don't mix reflink and DAX mode for now
Since we don't have a strategy for handling both DAX and reflink,
for now we'll just prohibit both being set at the same time.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_buf.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_file.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_iops.c | 1 |
4 files changed, 13 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index f1b9d97c540f..8de9a3a29589 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -407,6 +407,10 @@ xfs_dinode_verify( if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME)) return false; + /* don't let reflink and dax mix */ + if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX)) + return false; + return true; } diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 0726df88bce2..54c27edb74bc 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1055,6 +1055,10 @@ xfs_file_share_range( if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode)) return -EINVAL; + /* Don't share DAX file data for now. */ + if (IS_DAX(inode_in) || IS_DAX(inode_out)) + return -EINVAL; + /* Are we going all the way to the end? */ isize = i_size_read(inode_in); if (isize == 0) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index c65d9eacf54d..8b9f31c54c1e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -1038,6 +1038,10 @@ xfs_ioctl_setattr_xflags( if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) return -EINVAL; + /* Don't allow us to set DAX mode for a reflinked file for now. */ + if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) + return -EINVAL; + /* * Can't modify an immutable/append-only file unless * we have appropriate permission. diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index b24c3102fa93..5945b64f77cc 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -1144,6 +1144,7 @@ xfs_diflags_to_iflags( inode->i_flags |= S_NOATIME; if (S_ISREG(inode->i_mode) && ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && + !xfs_is_reflink_inode(ip) && (ip->i_mount->m_flags & XFS_MOUNT_DAX || ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) inode->i_flags |= S_DAX; |