Merge tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux (7b249bdc) · Commits · 戴 / test

Pull xfs fixes from Darrick Wong: "I have one more bugfix for you for 4.12-rc7 to fix a disk corruption problem: - don't allow swapon on files on the realtime device, because the swap code will swap pages out to blocks on the data device, thereby corrupting the filesystem" * tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: don't allow bmap on rt files

fs/xfs/xfs_aops.c

+5 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1316,9 +1316,12 @@ xfs_vm_bmap(
	* The swap code (ab-)uses ->bmap to get a block mapping and then		* The swap code (ab-)uses ->bmap to get a block mapping and then
	* bypasseѕ the file system for actual I/O. We really can't allow		* bypasseѕ the file system for actual I/O. We really can't allow
	* that on reflinks inodes, so we have to skip out here. And yes,		* that on reflinks inodes, so we have to skip out here. And yes,
	* 0 is the magic code for a bmap error..		* 0 is the magic code for a bmap error.
			*
			* Since we don't pass back blockdev info, we can't return bmap
			* information for rt files either.
	*/		*/
	if (xfs_is_reflink_inode(ip))		if (xfs_is_reflink_inode(ip) \|\| XFS_IS_REALTIME_INODE(ip))
	return 0;		return 0;

	filemap_write_and_wait(mapping);		filemap_write_and_wait(mapping);

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