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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/xfs_ioctl.c
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@@ -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.