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genetlink: add and use genl_set_err()

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Add a static inline to generic netlink to wrap netlink_set_err()
to make it easier to use here - use it in openvswitch (the only
generic netlink user of netlink_set_err()).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2013-11-19 15:19:37 +01:00 committed by David S. Miller
parent c2ebb90846
commit 62b68e99fa
3 changed files with 21 additions and 7 deletions
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14
include/net/genetlink.h
View File

@ -351,5 +351,19 @@ static inline struct sk_buff *genlmsg_new(size_t payload, gfp_t flags)
return nlmsg_new(genlmsg_total_size(payload), flags);
}
/**
* genl_set_err - report error to genetlink broadcast listeners
* @net: the network namespace to report the error to
* @portid: the PORTID of a process that we want to skip (if any)
* @group: the broadcast group that will notice the error
* @code: error code, must be negative (as usual in kernelspace)
*
* This function returns the number of broadcast listeners that have set the
* NETLINK_RECV_NO_ENOBUFS socket option.
*/
static inline int genl_set_err(struct net *net, u32 portid, u32 group, int code)
{
return netlink_set_err(net->genl_sock, portid, group, code);
}
#endif /* __NET_GENERIC_NETLINK_H */

8
net/openvswitch/datapath.c
View File

@ -879,8 +879,8 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
if (!IS_ERR(reply))
ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
else
netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
genl_set_err(sock_net(skb->sk), 0,
ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
return 0;
err_flow_free:
@ -1326,8 +1326,8 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
info->snd_seq, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ovs_dp_datapath_multicast_group.id, err);
genl_set_err(sock_net(skb->sk), 0,
ovs_dp_datapath_multicast_group.id, err);
err = 0;
goto unlock;
}

6
net/openvswitch/dp_notify.c
View File

@ -34,9 +34,9 @@ static void dp_detach_port_notify(struct vport *vport)
OVS_VPORT_CMD_DEL);
ovs_dp_detach_port(vport);
if (IS_ERR(notify)) {
netlink_set_err(ovs_dp_get_net(dp)->genl_sock, 0,
ovs_dp_vport_multicast_group.id,
PTR_ERR(notify));
genl_set_err(ovs_dp_get_net(dp), 0,
ovs_dp_vport_multicast_group.id,
PTR_ERR(notify));
return;
}