Commit 065b4761 authored by Roopa Prabhu's avatar Roopa Prabhu Committed by Greg Kroah-Hartman

rtnetlink: catch -EOPNOTSUPP errors from ndo_bridge_getlink

[ Upstream commit d64f69b0 ]

problem reported:
	kernel 4.1.3
	------------
	# bridge vlan
	port	vlan ids
	eth0	 1 PVID Egress Untagged
	 	90
	 	91
	 	92
	 	93
	 	94
	 	95
	 	96
	 	97
	 	98
	 	99
	 	100

	vmbr0	 1 PVID Egress Untagged
	 	94

	kernel 4.2
	-----------
	# bridge vlan
	port	vlan ids

ndo_bridge_getlink can return -EOPNOTSUPP when an interfaces
ndo_bridge_getlink op is set to switchdev_port_bridge_getlink
and CONFIG_SWITCHDEV is not defined. This today can happen to
bond, rocker and team devices. This patch adds -EOPNOTSUPP
checks after calls to ndo_bridge_getlink.

Fixes: 85fdb956 ("switchdev: cut over to new switchdev_port_bridge_getlink")
Reported-by: default avatarAlexandre DERUMIER <aderumier@odiso.com>
Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent abb7a034
......@@ -3021,6 +3021,7 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
u32 portid = NETLINK_CB(cb->skb).portid;
u32 seq = cb->nlh->nlmsg_seq;
u32 filter_mask = 0;
int err;
if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
struct nlattr *extfilt;
......@@ -3041,20 +3042,25 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
br_dev->netdev_ops->ndo_bridge_getlink(
skb, portid, seq, dev, filter_mask,
NLM_F_MULTI) < 0)
break;
if (idx >= cb->args[0]) {
err = br_dev->netdev_ops->ndo_bridge_getlink(
skb, portid, seq, dev,
filter_mask, NLM_F_MULTI);
if (err < 0 && err != -EOPNOTSUPP)
break;
}
idx++;
}
if (ops->ndo_bridge_getlink) {
if (idx >= cb->args[0] &&
ops->ndo_bridge_getlink(skb, portid, seq, dev,
filter_mask,
NLM_F_MULTI) < 0)
break;
if (idx >= cb->args[0]) {
err = ops->ndo_bridge_getlink(skb, portid,
seq, dev,
filter_mask,
NLM_F_MULTI);
if (err < 0 && err != -EOPNOTSUPP)
break;
}
idx++;
}
}
......
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