xfs: introduce refcount btree definitions
Add new per-AG refcount btree definitions to the per-AG structures.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index 0f14b2e..93a7aaf 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -114,6 +114,13 @@
return -ENXIO;
/*
+ * The pNFS block layout spec actually supports reflink like
+ * functionality, but the Linux pNFS server doesn't implement it yet.
+ */
+ if (xfs_is_reflink_inode(ip))
+ return -ENXIO;
+
+ /*
* Lock out any other I/O before we flush and invalidate the pagecache,
* and then hand out a layout to the remote system. This is very
* similar to direct I/O, except that the synchronization is much more