X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-vport.c;h=c214bf7132e9327fb64507d5a460bbd4774f10bb;hb=41ca1e0afb4b261a217c9fdaf672ef606e8434f9;hp=bdb0c4da3acbd09ee543f2eb14c46570ffac497f;hpb=b1612a86b5cebc7f13f10fd5f5b084fcc4b80e49;p=sliver-openvswitch.git

diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index bdb0c4da3..c214bf713 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -34,6 +34,7 @@
 #include "netdev-provider.h"
 #include "ofpbuf.h"
 #include "packets.h"
+#include "poll-loop.h"
 #include "route-table.h"
 #include "shash.h"
 #include "socket-util.h"
@@ -48,12 +49,17 @@ VLOG_DEFINE_THIS_MODULE(netdev_vport);
 
 struct netdev_vport {
     struct netdev up;
-    unsigned int change_seq;
+
+    /* Protects all members below. */
+    struct ovs_mutex mutex;
+
     uint8_t etheraddr[ETH_ADDR_LEN];
     struct netdev_stats stats;
 
     /* Tunnels. */
     struct netdev_tunnel_config tnl_cfg;
+    char egress_iface[IFNAMSIZ];
+    bool carrier_status;
 
     /* Patch Ports. */
     char *peer;
@@ -64,16 +70,24 @@ struct vport_class {
     struct netdev_class netdev_class;
 };
 
-static int netdev_vport_create(const struct netdev_class *, const char *,
-                               struct netdev **);
-static int get_patch_config(const struct netdev *, struct smap *args);
+/* Last read of the route-table's change number. */
+static uint64_t rt_change_seqno;
+
+static int netdev_vport_construct(struct netdev *);
+static int get_patch_config(const struct netdev *netdev, struct smap *args);
 static int get_tunnel_config(const struct netdev *, struct smap *args);
-static void netdev_vport_poll_notify(struct netdev_vport *);
+static bool tunnel_check_status_change__(struct netdev_vport *);
 
 static bool
 is_vport_class(const struct netdev_class *class)
 {
-    return class->create == netdev_vport_create;
+    return class->construct == netdev_vport_construct;
+}
+
+bool
+netdev_vport_is_vport_class(const struct netdev_class *class)
+{
+    return is_vport_class(class);
 }
 
 static const struct vport_class *
@@ -104,6 +118,14 @@ netdev_vport_is_patch(const struct netdev *netdev)
     return class->get_config == get_patch_config;
 }
 
+bool
+netdev_vport_is_layer3(const struct netdev *dev)
+{
+    const char *type = netdev_get_type(dev);
+
+    return (!strcmp("lisp", type));
+}
+
 static bool
 netdev_vport_needs_dst_port(const struct netdev *dev)
 {
@@ -155,30 +177,68 @@ netdev_vport_get_dpif_port_strdup(const struct netdev *netdev)
                                               sizeof namebuf));
 }
 
+/* Whenever the route-table change number is incremented,
+ * netdev_vport_route_changed() should be called to update
+ * the corresponding tunnel interface status. */
+static void
+netdev_vport_route_changed(void)
+{
+    struct netdev **vports;
+    size_t i, n_vports;
+
+    vports = netdev_get_vports(&n_vports);
+    for (i = 0; i < n_vports; i++) {
+        struct netdev *netdev_ = vports[i];
+        struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+
+        ovs_mutex_lock(&netdev->mutex);
+        /* Finds all tunnel vports. */
+        if (netdev->tnl_cfg.ip_dst) {
+            if (tunnel_check_status_change__(netdev)) {
+                netdev_change_seq_changed(netdev_);
+            }
+        }
+        netdev_close(netdev_);
+        ovs_mutex_unlock(&netdev->mutex);
+    }
+
+    free(vports);
+}
+
+static struct netdev *
+netdev_vport_alloc(void)
+{
+    struct netdev_vport *netdev = xzalloc(sizeof *netdev);
+    return &netdev->up;
+}
+
 static int
-netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
-                    struct netdev **netdevp)
+netdev_vport_construct(struct netdev *netdev_)
 {
-    struct netdev_vport *dev;
+    struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 
-    dev = xzalloc(sizeof *dev);
-    netdev_init(&dev->up, name, netdev_class);
-    dev->change_seq = 1;
-    eth_addr_random(dev->etheraddr);
+    ovs_mutex_init(&netdev->mutex);
+    eth_addr_random(netdev->etheraddr);
 
-    *netdevp = &dev->up;
     route_table_register();
 
     return 0;
 }
 
 static void
-netdev_vport_destroy(struct netdev *netdev_)
+netdev_vport_destruct(struct netdev *netdev_)
 {
     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 
     route_table_unregister();
     free(netdev->peer);
+    ovs_mutex_destroy(&netdev->mutex);
+}
+
+static void
+netdev_vport_dealloc(struct netdev *netdev_)
+{
+    struct netdev_vport *netdev = netdev_vport_cast(netdev_);
     free(netdev);
 }
 
@@ -187,38 +247,72 @@ netdev_vport_set_etheraddr(struct netdev *netdev_,
                            const uint8_t mac[ETH_ADDR_LEN])
 {
     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+
+    ovs_mutex_lock(&netdev->mutex);
     memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN);
-    netdev_vport_poll_notify(netdev);
+    ovs_mutex_unlock(&netdev->mutex);
+    netdev_change_seq_changed(netdev_);
+
     return 0;
 }
 
 static int
-netdev_vport_get_etheraddr(const struct netdev *netdev,
+netdev_vport_get_etheraddr(const struct netdev *netdev_,
                            uint8_t mac[ETH_ADDR_LEN])
 {
-    memcpy(mac, netdev_vport_cast(netdev)->etheraddr, ETH_ADDR_LEN);
+    struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+
+    ovs_mutex_lock(&netdev->mutex);
+    memcpy(mac, netdev->etheraddr, ETH_ADDR_LEN);
+    ovs_mutex_unlock(&netdev->mutex);
+
     return 0;
 }
 
-static int
-tunnel_get_status(const struct netdev *netdev, struct smap *smap)
+/* Checks if the tunnel status has changed and returns a boolean.
+ * Updates the tunnel status if it has changed. */
+static bool
+tunnel_check_status_change__(struct netdev_vport *netdev)
+    OVS_REQUIRES(netdev->mutex)
 {
     char iface[IFNAMSIZ];
+    bool status = false;
     ovs_be32 route;
 
-    route = netdev_vport_cast(netdev)->tnl_cfg.ip_dst;
+    iface[0] = '\0';
+    route = netdev->tnl_cfg.ip_dst;
     if (route_table_get_name(route, iface)) {
         struct netdev *egress_netdev;
 
-        smap_add(smap, "tunnel_egress_iface", iface);
-
         if (!netdev_open(iface, "system", &egress_netdev)) {
-            smap_add(smap, "tunnel_egress_iface_carrier",
-                     netdev_get_carrier(egress_netdev) ? "up" : "down");
+            status = netdev_get_carrier(egress_netdev);
             netdev_close(egress_netdev);
         }
     }
 
+    if (strcmp(netdev->egress_iface, iface)
+        || netdev->carrier_status != status) {
+        ovs_strlcpy(netdev->egress_iface, iface, IFNAMSIZ);
+        netdev->carrier_status = status;
+
+        return true;
+    }
+
+    return false;
+}
+
+static int
+tunnel_get_status(const struct netdev *netdev_, struct smap *smap)
+{
+    struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+
+    if (netdev->egress_iface[0]) {
+        smap_add(smap, "tunnel_egress_iface", netdev->egress_iface);
+
+        smap_add(smap, "tunnel_egress_iface_carrier",
+                 netdev->carrier_status ? "up" : "down");
+    }
+
     return 0;
 }
 
@@ -236,32 +330,28 @@ netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
     return 0;
 }
 
-static unsigned int
-netdev_vport_change_seq(const struct netdev *netdev)
-{
-    return netdev_vport_cast(netdev)->change_seq;
-}
-
 static void
 netdev_vport_run(void)
 {
+    uint64_t seq;
+
     route_table_run();
+    seq = route_table_get_change_seq();
+    if (rt_change_seqno != seq) {
+        rt_change_seqno = seq;
+        netdev_vport_route_changed();
+    }
 }
 
 static void
 netdev_vport_wait(void)
 {
-    route_table_wait();
-}
-
-/* Helper functions. */
+    uint64_t seq;
 
-static void
-netdev_vport_poll_notify(struct netdev_vport *ndv)
-{
-    ndv->change_seq++;
-    if (!ndv->change_seq) {
-        ndv->change_seq++;
+    route_table_wait();
+    seq = route_table_get_change_seq();
+    if (rt_change_seqno != seq) {
+        poll_immediate_wake();
     }
 }
 
@@ -413,13 +503,19 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
     }
 
     if (tnl_cfg.ipsec) {
+        static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
         static pid_t pid = 0;
+
+#ifndef _WIN32
+        ovs_mutex_lock(&mutex);
         if (pid <= 0) {
             char *file_name = xasprintf("%s/%s", ovs_rundir(),
                                         "ovs-monitor-ipsec.pid");
             pid = read_pidfile(file_name);
             free(file_name);
         }
+        ovs_mutex_unlock(&mutex);
+#endif
 
         if (pid < 0) {
             VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
@@ -461,8 +557,11 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
                                &tnl_cfg.out_key_present,
                                &tnl_cfg.out_key_flow);
 
+    ovs_mutex_lock(&dev->mutex);
     dev->tnl_cfg = tnl_cfg;
-    netdev_vport_poll_notify(dev);
+    tunnel_check_status_change__(dev);
+    netdev_change_seq_changed(dev_);
+    ovs_mutex_unlock(&dev->mutex);
 
     return 0;
 }
@@ -470,56 +569,60 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args)
 static int
 get_tunnel_config(const struct netdev *dev, struct smap *args)
 {
-    const struct netdev_tunnel_config *tnl_cfg =
-        &netdev_vport_cast(dev)->tnl_cfg;
+    struct netdev_vport *netdev = netdev_vport_cast(dev);
+    struct netdev_tunnel_config tnl_cfg;
 
-    if (tnl_cfg->ip_dst) {
-        smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg->ip_dst));
-    } else if (tnl_cfg->ip_dst_flow) {
+    ovs_mutex_lock(&netdev->mutex);
+    tnl_cfg = netdev->tnl_cfg;
+    ovs_mutex_unlock(&netdev->mutex);
+
+    if (tnl_cfg.ip_dst) {
+        smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_dst));
+    } else if (tnl_cfg.ip_dst_flow) {
         smap_add(args, "remote_ip", "flow");
     }
 
-    if (tnl_cfg->ip_src) {
-        smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg->ip_src));
-    } else if (tnl_cfg->ip_src_flow) {
+    if (tnl_cfg.ip_src) {
+        smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_src));
+    } else if (tnl_cfg.ip_src_flow) {
         smap_add(args, "local_ip", "flow");
     }
 
-    if (tnl_cfg->in_key_flow && tnl_cfg->out_key_flow) {
+    if (tnl_cfg.in_key_flow && tnl_cfg.out_key_flow) {
         smap_add(args, "key", "flow");
-    } else if (tnl_cfg->in_key_present && tnl_cfg->out_key_present
-               && tnl_cfg->in_key == tnl_cfg->out_key) {
-        smap_add_format(args, "key", "%"PRIu64, ntohll(tnl_cfg->in_key));
+    } else if (tnl_cfg.in_key_present && tnl_cfg.out_key_present
+               && tnl_cfg.in_key == tnl_cfg.out_key) {
+        smap_add_format(args, "key", "%"PRIu64, ntohll(tnl_cfg.in_key));
     } else {
-        if (tnl_cfg->in_key_flow) {
+        if (tnl_cfg.in_key_flow) {
             smap_add(args, "in_key", "flow");
-        } else if (tnl_cfg->in_key_present) {
+        } else if (tnl_cfg.in_key_present) {
             smap_add_format(args, "in_key", "%"PRIu64,
-                            ntohll(tnl_cfg->in_key));
+                            ntohll(tnl_cfg.in_key));
         }
 
-        if (tnl_cfg->out_key_flow) {
+        if (tnl_cfg.out_key_flow) {
             smap_add(args, "out_key", "flow");
-        } else if (tnl_cfg->out_key_present) {
+        } else if (tnl_cfg.out_key_present) {
             smap_add_format(args, "out_key", "%"PRIu64,
-                            ntohll(tnl_cfg->out_key));
+                            ntohll(tnl_cfg.out_key));
         }
     }
 
-    if (tnl_cfg->ttl_inherit) {
+    if (tnl_cfg.ttl_inherit) {
         smap_add(args, "ttl", "inherit");
-    } else if (tnl_cfg->ttl != DEFAULT_TTL) {
-        smap_add_format(args, "ttl", "%"PRIu8, tnl_cfg->ttl);
+    } else if (tnl_cfg.ttl != DEFAULT_TTL) {
+        smap_add_format(args, "ttl", "%"PRIu8, tnl_cfg.ttl);
     }
 
-    if (tnl_cfg->tos_inherit) {
+    if (tnl_cfg.tos_inherit) {
         smap_add(args, "tos", "inherit");
-    } else if (tnl_cfg->tos) {
-        smap_add_format(args, "tos", "0x%x", tnl_cfg->tos);
+    } else if (tnl_cfg.tos) {
+        smap_add_format(args, "tos", "0x%x", tnl_cfg.tos);
     }
 
-    if (tnl_cfg->dst_port) {
-        uint16_t dst_port = ntohs(tnl_cfg->dst_port);
+    if (tnl_cfg.dst_port) {
+        uint16_t dst_port = ntohs(tnl_cfg.dst_port);
         const char *type = netdev_get_type(dev);
 
         if ((!strcmp("vxlan", type) && dst_port != VXLAN_DST_PORT) ||
@@ -528,11 +631,11 @@ get_tunnel_config(const struct netdev *dev, struct smap *args)
         }
     }
 
-    if (tnl_cfg->csum) {
+    if (tnl_cfg.csum) {
         smap_add(args, "csum", "true");
     }
 
-    if (!tnl_cfg->dont_fragment) {
+    if (!tnl_cfg.dont_fragment) {
         smap_add(args, "df_default", "false");
     }
 
@@ -541,22 +644,39 @@ get_tunnel_config(const struct netdev *dev, struct smap *args)
 
 /* Code specific to patch ports. */
 
-const char *
-netdev_vport_patch_peer(const struct netdev *netdev)
+/* If 'netdev' is a patch port, returns the name of its peer as a malloc()'d
+ * string that the caller must free.
+ *
+ * If 'netdev' is not a patch port, returns NULL. */
+char *
+netdev_vport_patch_peer(const struct netdev *netdev_)
 {
-    return (netdev_vport_is_patch(netdev)
-            ? netdev_vport_cast(netdev)->peer
-            : NULL);
+    char *peer = NULL;
+
+    if (netdev_vport_is_patch(netdev_)) {
+        struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+
+        ovs_mutex_lock(&netdev->mutex);
+        if (netdev->peer) {
+            peer = xstrdup(netdev->peer);
+        }
+        ovs_mutex_unlock(&netdev->mutex);
+    }
+
+    return peer;
 }
 
 void
 netdev_vport_inc_rx(const struct netdev *netdev,
-                          const struct dpif_flow_stats *stats)
+                    const struct dpif_flow_stats *stats)
 {
     if (is_vport_class(netdev_get_class(netdev))) {
         struct netdev_vport *dev = netdev_vport_cast(netdev);
+
+        ovs_mutex_lock(&dev->mutex);
         dev->stats.rx_packets += stats->n_packets;
         dev->stats.rx_bytes += stats->n_bytes;
+        ovs_mutex_unlock(&dev->mutex);
     }
 }
 
@@ -566,8 +686,11 @@ netdev_vport_inc_tx(const struct netdev *netdev,
 {
     if (is_vport_class(netdev_get_class(netdev))) {
         struct netdev_vport *dev = netdev_vport_cast(netdev);
+
+        ovs_mutex_lock(&dev->mutex);
         dev->stats.tx_packets += stats->n_packets;
         dev->stats.tx_bytes += stats->n_bytes;
+        ovs_mutex_unlock(&dev->mutex);
     }
 }
 
@@ -576,9 +699,12 @@ get_patch_config(const struct netdev *dev_, struct smap *args)
 {
     struct netdev_vport *dev = netdev_vport_cast(dev_);
 
+    ovs_mutex_lock(&dev->mutex);
     if (dev->peer) {
         smap_add(args, "peer", dev->peer);
     }
+    ovs_mutex_unlock(&dev->mutex);
+
     return 0;
 }
 
@@ -605,8 +731,11 @@ set_patch_config(struct netdev *dev_, const struct smap *args)
         return EINVAL;
     }
 
+    ovs_mutex_lock(&dev->mutex);
     free(dev->peer);
     dev->peer = xstrdup(peer);
+    netdev_change_seq_changed(dev_);
+    ovs_mutex_unlock(&dev->mutex);
 
     return 0;
 }
@@ -615,7 +744,11 @@ static int
 get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 {
     struct netdev_vport *dev = netdev_vport_cast(netdev);
-    memcpy(stats, &dev->stats, sizeof *stats);
+
+    ovs_mutex_lock(&dev->mutex);
+    *stats = dev->stats;
+    ovs_mutex_unlock(&dev->mutex);
+
     return 0;
 }
 
@@ -625,14 +758,14 @@ get_stats(const struct netdev *netdev, struct netdev_stats *stats)
     netdev_vport_run,                                       \
     netdev_vport_wait,                                      \
                                                             \
-    netdev_vport_create,                                    \
-    netdev_vport_destroy,                                   \
+    netdev_vport_alloc,                                     \
+    netdev_vport_construct,                                 \
+    netdev_vport_destruct,                                  \
+    netdev_vport_dealloc,                                   \
     GET_CONFIG,                                             \
     SET_CONFIG,                                             \
     GET_TUNNEL_CONFIG,                                      \
                                                             \
-    NULL,                       /* rx_open */               \
-                                                            \
     NULL,                       /* send */                  \
     NULL,                       /* send_wait */             \
                                                             \
@@ -659,7 +792,9 @@ get_stats(const struct netdev *netdev, struct netdev_stats *stats)
     NULL,                       /* set_queue */             \
     NULL,                       /* delete_queue */          \
     NULL,                       /* get_queue_stats */       \
-    NULL,                       /* dump_queues */           \
+    NULL,                       /* queue_dump_start */      \
+    NULL,                       /* queue_dump_next */       \
+    NULL,                       /* queue_dump_done */       \
     NULL,                       /* dump_queue_stats */      \
                                                             \
     NULL,                       /* get_in4 */               \
@@ -672,7 +807,13 @@ get_stats(const struct netdev *netdev, struct netdev_stats *stats)
                                                             \
     netdev_vport_update_flags,                              \
                                                             \
-    netdev_vport_change_seq
+    NULL,                   /* rx_alloc */                  \
+    NULL,                   /* rx_construct */              \
+    NULL,                   /* rx_destruct */               \
+    NULL,                   /* rx_dealloc */                \
+    NULL,                   /* rx_recv */                   \
+    NULL,                   /* rx_wait */                   \
+    NULL,                   /* rx_drain */
 
 #define TUNNEL_CLASS(NAME, DPIF_PORT)                       \
     { DPIF_PORT,                                            \
@@ -692,15 +833,15 @@ netdev_vport_tunnel_register(void)
         TUNNEL_CLASS("vxlan", "vxlan_system"),
         TUNNEL_CLASS("lisp", "lisp_system")
     };
-    static bool inited;
+    static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
 
-    int i;
+    if (ovsthread_once_start(&once)) {
+        int i;
 
-    if (!inited) {
-        inited = true;
         for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
             netdev_register_provider(&vport_classes[i].netdev_class);
         }
+        ovsthread_once_done(&once);
     }
 }