NFSv4.2: LAYOUTSTATS is optional to implement
Make it so, by checking the return value for NFS4ERR_MOTSUPP and
caching the information as a server capability.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 5e1273d..a2ea149 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -237,5 +237,6 @@
#define NFS_CAP_SEEK (1U << 19)
#define NFS_CAP_ALLOCATE (1U << 20)
#define NFS_CAP_DEALLOCATE (1U << 21)
+#define NFS_CAP_LAYOUTSTATS (1U << 22)
#endif