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openvswitch: Allow user space to announce ability to accept unaligned Netlink messages 

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Thomas Graf 2013-12-13 15:22:18 +01:00 committed by Jesse Gross
parent af2806f8f9
commit 43d4be9cb5
3 changed files with 20 additions and 0 deletions
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4
include/uapi/linux/openvswitch.h
View File

@ -75,6 +75,7 @@ enum ovs_datapath_attr {
OVS_DP_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
OVS_DP_ATTR_STATS, /* struct ovs_dp_stats */
OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
__OVS_DP_ATTR_MAX
};
@ -106,6 +107,9 @@ struct ovs_vport_stats {
__u64 tx_dropped; /* no space available in linux */
};
/* Allow last Netlink attribute to be unaligned */
#define OVS_DP_F_UNALIGNED (1 << 0)
/* Fixed logical ports. */
#define OVSP_LOCAL ((__u32)0)

14
net/openvswitch/datapath.c
View File

@ -1040,6 +1040,7 @@ static const struct genl_ops dp_flow_genl_ops[] = {
static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
[OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
[OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
[OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
};
static struct genl_family dp_datapath_genl_family = {
@ -1098,6 +1099,9 @@ static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
&dp_megaflow_stats))
goto nla_put_failure;
if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
goto nla_put_failure;
return genlmsg_end(skb, ovs_header);
nla_put_failure:
@ -1144,6 +1148,12 @@ static struct datapath *lookup_datapath(struct net *net,
return dp ? dp : ERR_PTR(-ENODEV);
}
static void ovs_dp_change(struct datapath *dp, struct nlattr **a)
{
if (a[OVS_DP_ATTR_USER_FEATURES])
dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
}
static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr **a = info->attrs;
@ -1202,6 +1212,8 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
parms.port_no = OVSP_LOCAL;
parms.upcall_portid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
ovs_dp_change(dp, a);
vport = new_vport(&parms);
if (IS_ERR(vport)) {
err = PTR_ERR(vport);
@ -1305,6 +1317,8 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(dp))
goto unlock;
ovs_dp_change(dp, info->attrs);
reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);

2
net/openvswitch/datapath.h
View File

@ -88,6 +88,8 @@ struct datapath {
/* Network namespace ref. */
struct net *net;
#endif
u32 user_features;
};
/**