datapath: Strip down vport interface : OVS_VPORT_ATTR_MTU

[sliver-openvswitch.git] / lib / dpif-linux.c

diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
index 55d22b4..9533e14 100644 (file)
--- a/lib/dpif-linux.c
+++ b/lib/dpif-linux.c
@@ -39,6 +39,7 @@
 #include "netdev.h"
 #include "netdev-linux.h"
 #include "netdev-vport.h"
+#include "netlink-notifier.h"
 #include "netlink-socket.h"
 #include "netlink.h"
 #include "odp-util.h"
@@ -46,8 +47,6 @@
 #include "openvswitch/tunnel.h"
 #include "packets.h"
 #include "poll-loop.h"
-#include "rtnetlink.h"
-#include "rtnetlink-link.h"
 #include "shash.h"
 #include "sset.h"
 #include "unaligned.h"
@@ -60,6 +59,10 @@ enum { LRU_MAX_PORTS = 1024 };
 enum { LRU_MASK = LRU_MAX_PORTS - 1};
 BUILD_ASSERT_DECL(IS_POW2(LRU_MAX_PORTS));
 
+/* This ethtool flag was introduced in Linux 2.6.24, so it might be
+ * missing if we have old headers. */
+#define ETH_FLAG_LRO      (1 << 15)    /* LRO is enabled */
+
 struct dpif_linux_dp {
     /* Generic Netlink header. */
     uint8_t cmd;
@@ -134,7 +137,7 @@ struct dpif_linux {
 
     /* Change notification. */
     struct sset changed_ports;  /* Ports that have changed. */
-    struct rtnetlink_notifier port_notifier;
+    struct nln_notifier port_notifier;
     bool change_error;
 
     /* Queue of unused ports. */
@@ -154,11 +157,12 @@ static int ovs_packet_family;
 
 /* Generic Netlink socket. */
 static struct nl_sock *genl_sock;
+static struct nln *nln = NULL;
 
 static int dpif_linux_init(void);
 static int open_dpif(const struct dpif_linux_dp *, struct dpif **);
-static void dpif_linux_port_changed(const struct rtnetlink_link_change *,
-                                    void *dpif);
+static bool dpif_linux_nln_parse(struct ofpbuf *, void *);
+static void dpif_linux_port_changed(const void *vport, void *dpif);
 
 static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *,
                                        struct ofpbuf *);
@@ -253,8 +257,8 @@ open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp)
     int i;
 
     dpif = xmalloc(sizeof *dpif);
-    error = rtnetlink_link_notifier_register(&dpif->port_notifier,
-                                             dpif_linux_port_changed, dpif);
+    error = nln_notifier_register(nln, &dpif->port_notifier,
+                                  dpif_linux_port_changed, dpif);
     if (error) {
         goto error_free;
     }
@@ -289,8 +293,12 @@ static void
 dpif_linux_close(struct dpif *dpif_)
 {
     struct dpif_linux *dpif = dpif_linux_cast(dpif_);
+
+    if (nln) {
+        nln_notifier_unregister(nln, &dpif->port_notifier);
+    }
+
     nl_sock_destroy(dpif->mc_sock);
-    rtnetlink_link_notifier_unregister(&dpif->port_notifier);
     sset_destroy(&dpif->changed_ports);
     free(dpif->lru_bitmap);
     free(dpif);
@@ -311,13 +319,17 @@ dpif_linux_destroy(struct dpif *dpif_)
 static void
 dpif_linux_run(struct dpif *dpif OVS_UNUSED)
 {
-    rtnetlink_link_notifier_run();
+    if (nln) {
+        nln_notifier_run(nln);
+    }
 }
 
 static void
 dpif_linux_wait(struct dpif *dpif OVS_UNUSED)
 {
-    rtnetlink_link_notifier_wait();
+    if (nln) {
+        nln_notifier_wait(nln);
+    }
 }
 
 static int
@@ -393,6 +405,10 @@ dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
         request.options_len = options->size;
     }
 
+    if (request.type == OVS_VPORT_TYPE_NETDEV) {
+        netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false);
+    }
+
     /* Loop until we find a port that isn't used. */
     do {
         request.port_no = dpif_linux_pop_port(dpif);
@@ -1097,6 +1113,8 @@ dpif_linux_init(void)
     static int error = -1;
 
     if (error < 0) {
+        unsigned int ovs_vport_mcgroup;
+
         error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY,
                                       &ovs_datapath_family);
         if (error) {
@@ -1117,6 +1135,15 @@ dpif_linux_init(void)
         if (!error) {
             error = nl_sock_create(NETLINK_GENERIC, &genl_sock);
         }
+        if (!error) {
+            error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP,
+                                           &ovs_vport_mcgroup);
+        }
+        if (!error) {
+            static struct dpif_linux_vport vport;
+            nln = nln_create(NETLINK_GENERIC, ovs_vport_mcgroup,
+                             dpif_linux_nln_parse, &vport);
+        }
     }
 
     return error;
@@ -1162,20 +1189,27 @@ dpif_linux_vport_send(int dp_ifindex, uint32_t port_no,
                                 actions.data, actions.size, &packet);
 }
 
+static bool
+dpif_linux_nln_parse(struct ofpbuf *buf, void *vport_)
+{
+    struct dpif_linux_vport *vport = vport_;
+    return dpif_linux_vport_from_ofpbuf(vport, buf) == 0;
+}
+
 static void
-dpif_linux_port_changed(const struct rtnetlink_link_change *change,
-                        void *dpif_)
+dpif_linux_port_changed(const void *vport_, void *dpif_)
 {
+    const struct dpif_linux_vport *vport = vport_;
     struct dpif_linux *dpif = dpif_;
 
-    if (change) {
-        if (change->master_ifindex == dpif->dp_ifindex
-            && (change->nlmsg_type == RTM_NEWLINK
-                || change->nlmsg_type == RTM_DELLINK))
-        {
-            /* Our datapath changed, either adding a new port or deleting an
-             * existing one. */
-            sset_add(&dpif->changed_ports, change->ifname);
+    if (vport) {
+        if (vport->dp_ifindex == dpif->dp_ifindex
+            && (vport->cmd == OVS_VPORT_CMD_NEW
+                || vport->cmd == OVS_VPORT_CMD_DEL
+                || vport->cmd == OVS_VPORT_CMD_SET)) {
+            VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8,
+                     dpif->dpif.full_name, vport->name, vport->cmd);
+            sset_add(&dpif->changed_ports, vport->name);
         }
     } else {
         dpif->change_error = true;
@@ -1204,10 +1238,8 @@ dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
                                      .min_len = ETH_ADDR_LEN,
                                      .max_len = ETH_ADDR_LEN,
                                      .optional = true },
-        [OVS_VPORT_ATTR_MTU] = { .type = NL_A_U32, .optional = true },
         [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
         [OVS_VPORT_ATTR_IFINDEX] = { .type = NL_A_U32, .optional = true },
-        [OVS_VPORT_ATTR_IFLINK] = { .type = NL_A_U32, .optional = true },
     };
 
     struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)];
@@ -1240,11 +1272,6 @@ dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
     if (a[OVS_VPORT_ATTR_ADDRESS]) {
         vport->address = nl_attr_get(a[OVS_VPORT_ATTR_ADDRESS]);
     }
-    if (a[OVS_VPORT_ATTR_MTU]) {
-        vport->mtu = nl_attr_get_u32(a[OVS_VPORT_ATTR_MTU]);
-    } else {
-        vport->mtu = INT_MAX;
-    }
     if (a[OVS_VPORT_ATTR_OPTIONS]) {
         vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]);
         vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]);
@@ -1252,9 +1279,6 @@ dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
     if (a[OVS_VPORT_ATTR_IFINDEX]) {
         vport->ifindex = nl_attr_get_u32(a[OVS_VPORT_ATTR_IFINDEX]);
     }
-    if (a[OVS_VPORT_ATTR_IFLINK]) {
-        vport->iflink = nl_attr_get_u32(a[OVS_VPORT_ATTR_IFLINK]);
-    }
     return 0;
 }
 
@@ -1294,10 +1318,6 @@ dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport,
                           vport->address, ETH_ADDR_LEN);
     }
 
-    if (vport->mtu && vport->mtu != INT_MAX) {
-        nl_msg_put_u32(buf, OVS_VPORT_ATTR_MTU, vport->mtu);
-    }
-
     if (vport->options) {
         nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS,
                           vport->options, vport->options_len);
@@ -1306,10 +1326,6 @@ dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport,
     if (vport->ifindex) {
         nl_msg_put_u32(buf, OVS_VPORT_ATTR_IFINDEX, vport->ifindex);
     }
-
-    if (vport->iflink) {
-        nl_msg_put_u32(buf, OVS_VPORT_ATTR_IFLINK, vport->iflink);
-    }
 }
 
 /* Clears 'vport' to "empty" values. */