Commit 7c8f7af6 authored Feb 12, 2009 by Christoph Hellwig Committed by Christoph Hellwig Feb 12, 2009

xfs: reject swapext ioctl on swapfiles



Swapfiles are magic - I/O is directly initialized by the VM without
involving the filesystem.  Swapping out extents underneath the VM thus
can cause severe problems.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>

parent 26430752

fs/xfs/xfs_dfrag.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -79,6 +79,12 @@ xfs_swapext(
		goto out_put_target_file;
		}

		if (IS_SWAPFILE(file->f_path.dentry->d_inode) \|\|
		IS_SWAPFILE(target_file->f_path.dentry->d_inode)) {
		error = XFS_ERROR(EINVAL);
		goto out_put_target_file;
		}

		ip = XFS_I(file->f_path.dentry->d_inode);
		tip = XFS_I(target_file->f_path.dentry->d_inode);