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xfs: don't mix reflink and DAX mode for now

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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>
This commit is contained in:
Darrick J. Wong 2016-10-03 09:11:50 -07:00
parent c8e156ac33
commit 4f435ebe7d
4 changed files with 13 additions and 0 deletions
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4
fs/xfs/libxfs/xfs_inode_buf.c
View File

@ -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;
}

4
fs/xfs/xfs_file.c
View File

@ -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)

4
fs/xfs/xfs_ioctl.c
View File

@ -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.

1
fs/xfs/xfs_iops.c
View File

@ -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;