pNFS/flexfiles: Turn off layoutcommit for servers that don't need it
This patch ensures that we record the value of 'ffl_flags' from
the layout, and then checks for the presence of the
FF_FLAGS_NO_LAYOUTCOMMIT flag before deciding whether or not to
call pnfs_set_layoutcommit().
The effect is that servers now can decide whether or not they want
the client to call layoutcommit before returning a writeable layout.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h
index 6fcd8d5..f92f9a0 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.h
+++ b/fs/nfs/flexfilelayout/flexfilelayout.h
@@ -9,6 +9,8 @@
#ifndef FS_NFS_NFS4FLEXFILELAYOUT_H
#define FS_NFS_NFS4FLEXFILELAYOUT_H
+#define FF_FLAGS_NO_LAYOUTCOMMIT 1
+
#include "../pnfs.h"
/* XXX: Let's filter out insanely large mirror count for now to avoid oom
@@ -85,6 +87,7 @@
struct nfs4_ff_layout_segment {
struct pnfs_layout_segment generic_hdr;
u64 stripe_unit;
+ u32 flags;
u32 mirror_array_cnt;
struct nfs4_ff_layout_mirror **mirror_array;
};