From: Leon Romanovsky <leonro@mellanox.com>
Date: Tue, 3 Apr 2018 07:28:42 +0000 (+0300)
Subject: rdma: Ignore unknown netlink attributes
X-Git-Tag: v4.17.0~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fda0a61dde744abe69d4227f62b66238460c9011;p=thirdparty%2Fiproute2.git

rdma: Ignore unknown netlink attributes

The check if netlink attributes supplied more than maximum supported
is to strict and may lead to backward compatibility issues with old
application with a newer kernel that supports new attribute.

CC: Steve Wise <swise@opengridcomputing.com>
Fixes: 74bd75c2b68d ("rdma: Add basic infrastructure for RDMA tool")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---

diff --git a/rdma/utils.c b/rdma/utils.c
index a2e08e914..5c1e736af 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c
@@ -399,7 +399,8 @@ int rd_attr_cb(const struct nlattr *attr, void *data)
 	int type;
 
 	if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX) < 0)
-		return MNL_CB_ERROR;
+		/* We received uknown attribute */
+		return MNL_CB_OK;
 
 	type = mnl_attr_get_type(attr);