pnfs: layoutret_on_setattr
With the objects layout security model, we have object capabilities
that are associated with the layout and we anticipate that the server
will issue a cb_layoutrecall for any setattr that changes security
related attributes (user/group/mode/acl) or truncates the file.
Therefore, the layout is returned before issuing the setattr to avoid
the anticipated cb_layoutrecall.
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5b4124e..5734009 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2361,6 +2361,9 @@
struct nfs4_state *state = NULL;
int status;
+ if (pnfs_ld_layoutret_on_setattr(inode))
+ pnfs_return_layout(inode);
+
nfs_fattr_init(fattr);
/* Search for an existing open(O_WRITE) file */