[ovs-dev] [PATCH v2 3/8] vport: retrieve the netnsid if available.

[Flavio Leitner]

Recent kernels provide the network namespace ID of a port,
so use that to discover where the port currently is.

Signed-off-by: Flavio Leitner <fbl at redhat.com>
---
 datapath/linux/compat/include/linux/openvswitch.h |  2 ++
 lib/dpif-netlink.c                                |  6 ++++++
 lib/dpif-netlink.h                                |  2 ++
 lib/netdev-linux.c                                | 20 ++++++++++++++++++++
 4 files changed, 30 insertions(+)

diff --git a/datapath/linux/compat/include/linux/openvswitch.h b/datapath/linux/compat/include/linux/openvswitch.h
index bc6c94b8d..d2712d05f 100644
--- a/datapath/linux/compat/include/linux/openvswitch.h
+++ b/datapath/linux/compat/include/linux/openvswitch.h
@@ -283,6 +283,8 @@ enum ovs_vport_attr {
 				/* receiving upcalls */
 	OVS_VPORT_ATTR_STATS,	/* struct ovs_vport_stats */
 	OVS_VPORT_ATTR_PAD,
+	OVS_VPORT_ATTR_IFINDEX,
+	OVS_VPORT_ATTR_NETNSID,
 	__OVS_VPORT_ATTR_MAX
 };
 
diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
index fd333094d..b85e74c50 100644
--- a/lib/dpif-netlink.c
+++ b/lib/dpif-netlink.c
@@ -3065,6 +3065,7 @@ dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport,
         [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats),
                                    .optional = true },
         [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
+        [OVS_VPORT_ATTR_NETNSID] = { .type = NL_A_U32, .optional = true },
     };
 
     dpif_netlink_vport_init(vport);
@@ -3100,6 +3101,11 @@ dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport,
         vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]);
         vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]);
     }
+    if (a[OVS_VPORT_ATTR_NETNSID]) {
+        netns_set_id(&vport->netns, nl_attr_get_u32(a[OVS_VPORT_ATTR_NETNSID]));
+    } else {
+        netns_set_local(&vport->netns);
+    }
     return 0;
 }
 
diff --git a/lib/dpif-netlink.h b/lib/dpif-netlink.h
index 568b81441..680a74c2f 100644
--- a/lib/dpif-netlink.h
+++ b/lib/dpif-netlink.h
@@ -21,6 +21,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include "odp-netlink.h"
+#include "netns.h"
 
 #include "flow.h"
 
@@ -32,6 +33,7 @@ struct dpif_netlink_vport {
 
     /* ovs_vport header. */
     int dp_ifindex;
+    struct netns netns;
     odp_port_t port_no;                    /* ODPP_NONE if unknown. */
     enum ovs_vport_type type;
 
diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
index c31334ce1..fd181272b 100644
--- a/lib/netdev-linux.c
+++ b/lib/netdev-linux.c
@@ -476,6 +476,7 @@ struct netdev_linux {
     long long int miimon_interval;  /* Miimon Poll rate. Disabled if <= 0. */
     struct timer miimon_timer;
 
+    struct netns netns;         /* network namespace. */
     /* The following are figured out "on demand" only.  They are only valid
      * when the corresponding VALID_* bit in 'cache_valid' is set. */
     int ifindex;
@@ -571,6 +572,25 @@ netdev_rxq_linux_cast(const struct netdev_rxq *rx)
     return CONTAINER_OF(rx, struct netdev_rxq_linux, up);
 }
 
+static int
+netdev_linux_netns_update(struct netdev_linux *netdev)
+{
+    struct netns *dev_netns = &netdev->netns;
+    struct dpif_netlink_vport reply;
+    struct ofpbuf *buf;
+    int error;
+
+    error = dpif_netlink_vport_get(netdev_get_name(&netdev->up), &reply, &buf);
+    if (error) {
+        netns_set_invalid(dev_netns);
+        return error;
+    }
+
+    netns_copy(dev_netns, &reply.netns);
+    ofpbuf_delete(buf);
+    return 0;
+}
+
 static void netdev_linux_update(struct netdev_linux *netdev,
                                 const struct rtnetlink_change *)
     OVS_REQUIRES(netdev->mutex);
-- 
2.13.6