vswitchd: New column "link_resets".

[sliver-openvswitch.git] / lib / netdev-dummy.c

diff --git a/lib/netdev-dummy.c b/lib/netdev-dummy.c
index 4094f75..f62ea53 100644 (file)
--- a/lib/netdev-dummy.c
+++ b/lib/netdev-dummy.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,29 +28,21 @@
 
 VLOG_DEFINE_THIS_MODULE(netdev_dummy);
 
-struct netdev_dummy_notifier {
-    struct netdev_notifier notifier;
-    struct list list_node;
-    struct shash_node *shash_node;
-};
-
 struct netdev_dev_dummy {
     struct netdev_dev netdev_dev;
     uint8_t hwaddr[ETH_ADDR_LEN];
     int mtu;
     struct netdev_stats stats;
     enum netdev_flags flags;
+    unsigned int change_seq;
 };
 
 struct netdev_dummy {
     struct netdev netdev;
 };
 
-static struct shash netdev_dummy_notifiers =
-    SHASH_INITIALIZER(&netdev_dummy_notifiers);
-
 static int netdev_dummy_create(const struct netdev_class *, const char *,
-                               const struct shash *, struct netdev_dev **);
+                               struct netdev_dev **);
 static void netdev_dummy_poll_notify(const struct netdev *);
 
 static bool
@@ -76,14 +68,13 @@ netdev_dummy_cast(const struct netdev *netdev)
 
 static int
 netdev_dummy_create(const struct netdev_class *class, const char *name,
-                    const struct shash *args,
                     struct netdev_dev **netdev_devp)
 {
     static unsigned int n = 0xaa550000;
     struct netdev_dev_dummy *netdev_dev;
 
     netdev_dev = xzalloc(sizeof *netdev_dev);
-    netdev_dev_init(&netdev_dev->netdev_dev, name, args, class);
+    netdev_dev_init(&netdev_dev->netdev_dev, name, class);
     netdev_dev->hwaddr[0] = 0xaa;
     netdev_dev->hwaddr[1] = 0x55;
     netdev_dev->hwaddr[2] = n >> 24;
@@ -92,6 +83,7 @@ netdev_dummy_create(const struct netdev_class *class, const char *name,
     netdev_dev->hwaddr[5] = n;
     netdev_dev->mtu = 1500;
     netdev_dev->flags = 0;
+    netdev_dev->change_seq = 1;
 
     n++;
 
@@ -109,8 +101,7 @@ netdev_dummy_destroy(struct netdev_dev *netdev_dev_)
 }
 
 static int
-netdev_dummy_open(struct netdev_dev *netdev_dev_, int ethertype OVS_UNUSED,
-                  struct netdev **netdevp)
+netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
 {
     struct netdev_dummy *netdev;
 
@@ -128,6 +119,22 @@ netdev_dummy_close(struct netdev *netdev_)
     free(netdev);
 }
 
+static int
+netdev_dummy_listen(struct netdev *netdev_ OVS_UNUSED)
+{
+    /* It's OK to listen on a dummy device.  It just never receives any
+     * packets. */
+    return 0;
+}
+
+static int
+netdev_dummy_recv(struct netdev *netdev_ OVS_UNUSED,
+                  void *buffer OVS_UNUSED, size_t size OVS_UNUSED)
+{
+    /* A dummy device never receives any packets. */
+    return -EAGAIN;
+}
+
 static int
 netdev_dummy_set_etheraddr(struct netdev *netdev,
                            const uint8_t mac[ETH_ADDR_LEN])
@@ -164,6 +171,16 @@ netdev_dummy_get_mtu(const struct netdev *netdev, int *mtup)
     return 0;
 }
 
+static int
+netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
+{
+    struct netdev_dev_dummy *dev =
+        netdev_dev_dummy_cast(netdev_get_dev(netdev));
+
+    dev->mtu = mtu;
+    return 0;
+}
+
 static int
 netdev_dummy_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 {
@@ -205,50 +222,10 @@ netdev_dummy_update_flags(struct netdev *netdev,
     return 0;
 }
 
-static int
-netdev_dummy_poll_add(struct netdev *netdev,
-                      void (*cb)(struct netdev_notifier *), void *aux,
-                      struct netdev_notifier **notifierp)
+static unsigned int
+netdev_dummy_change_seq(const struct netdev *netdev)
 {
-    const char *name = netdev_get_name(netdev);
-    struct netdev_dummy_notifier *notifier;
-    struct list *list;
-    struct shash_node *shash_node;
-
-    shash_node = shash_find_data(&netdev_dummy_notifiers, name);
-    if (!shash_node) {
-        list = xmalloc(sizeof *list);
-        list_init(list);
-        shash_node = shash_add(&netdev_dummy_notifiers, name, list);
-    } else {
-        list = shash_node->data;
-    }
-
-    notifier = xmalloc(sizeof *notifier);
-    netdev_notifier_init(&notifier->notifier, netdev, cb, aux);
-    list_push_back(list, &notifier->list_node);
-    notifier->shash_node = shash_node;
-
-    *notifierp = &notifier->notifier;
-
-    return 0;
-}
-
-static void
-netdev_dummy_poll_remove(struct netdev_notifier *notifier_)
-{
-    struct netdev_dummy_notifier *notifier =
-        CONTAINER_OF(notifier_, struct netdev_dummy_notifier, notifier);
-
-    struct list *list;
-
-    list = list_remove(&notifier->list_node);
-    if (list_is_empty(list)) {
-        shash_delete(&netdev_dummy_notifiers, notifier->shash_node);
-        free(list);
-    }
-
-    free(notifier);
+    return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
 }
 \f
 /* Helper functions. */
@@ -256,16 +233,12 @@ netdev_dummy_poll_remove(struct netdev_notifier *notifier_)
 static void
 netdev_dummy_poll_notify(const struct netdev *netdev)
 {
-    const char *name = netdev_get_name(netdev);
-    struct list *list = shash_find_data(&netdev_dummy_notifiers, name);
-
-    if (list) {
-        struct netdev_dummy_notifier *notifier;
+    struct netdev_dev_dummy *dev =
+        netdev_dev_dummy_cast(netdev_get_dev(netdev));
 
-        LIST_FOR_EACH (notifier, list_node, list) {
-            struct netdev_notifier *n = &notifier->notifier;
-            n->cb(n);
-        }
+    dev->change_seq++;
+    if (!dev->change_seq) {
+        dev->change_seq++;
     }
 }
 
@@ -277,14 +250,14 @@ static const struct netdev_class dummy_class = {
 
     netdev_dummy_create,
     netdev_dummy_destroy,
-    NULL,
+    NULL,                       /* get_config */
+    NULL,                       /* set_config */
 
     netdev_dummy_open,
     netdev_dummy_close,
 
-    NULL,                       /* enumerate */
-
-    NULL,                       /* recv */
+    netdev_dummy_listen,        /* listen */
+    netdev_dummy_recv,          /* recv */
     NULL,                       /* recv_wait */
     NULL,                       /* drain */
 
@@ -294,8 +267,10 @@ static const struct netdev_class dummy_class = {
     netdev_dummy_set_etheraddr,
     netdev_dummy_get_etheraddr,
     netdev_dummy_get_mtu,
+    netdev_dummy_set_mtu,
     NULL,                       /* get_ifindex */
     NULL,                       /* get_carrier */
+    NULL,                       /* get_carrier_resets */
     NULL,                       /* get_miimon */
     netdev_dummy_get_stats,
     netdev_dummy_set_stats,
@@ -326,8 +301,7 @@ static const struct netdev_class dummy_class = {
 
     netdev_dummy_update_flags,
 
-    netdev_dummy_poll_add,
-    netdev_dummy_poll_remove,
+    netdev_dummy_change_seq
 };
 
 void