X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-manager.c;h=d4b05bb98710e6ca06e50eabc27cdf9afadd0325;hb=4d473d5dded03d3b682dc389d610bb6b2db6e5f7;hp=28de7919daebf83f8211d1bf09867d5d391564bf;hpb=667fcc6d7dab1b98dfbbb65f8f14127d8690e70f;p=elogind.git

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 28de7919d..d4b05bb98 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -20,6 +20,7 @@
  ***/
 
 #include <resolv.h>
+#include <linux/if.h>
 
 #include "path-util.h"
 #include "networkd.h"
@@ -80,6 +81,10 @@ int manager_new(Manager **ret) {
         if (!m)
                 return -ENOMEM;
 
+        m->state_file = strdup("/run/systemd/network/state");
+        if (!m->state_file)
+                return -ENOMEM;
+
         r = sd_event_default(&m->event);
         if (r < 0)
                 return r;
@@ -135,6 +140,8 @@ void manager_free(Manager *m) {
         if (!m)
                 return;
 
+        free(m->state_file);
+
         udev_monitor_unref(m->udev_monitor);
         udev_unref(m->udev);
         sd_bus_unref(m->bus);
@@ -144,14 +151,14 @@ void manager_free(Manager *m) {
         sd_event_unref(m->event);
 
         while ((link = hashmap_first(m->links)))
-                link_free(link);
+                link_unref(link);
         hashmap_free(m->links);
 
         while ((network = m->networks))
                 network_free(network);
 
         while ((netdev = hashmap_first(m->netdevs)))
-                netdev_free(netdev);
+                netdev_unref(netdev);
         hashmap_free(m->netdevs);
 
         sd_rtnl_unref(m->rtnl);
@@ -212,6 +219,8 @@ static int manager_udev_process_link(Manager *m, struct udev_device *device) {
 static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
         Manager *m = userdata;
         Link *link = NULL;
+        NetDev *netdev = NULL;
+        uint16_t type;
         char *name;
         int r, ifindex;
 
@@ -219,41 +228,61 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
         assert(message);
         assert(m);
 
+        r = sd_rtnl_message_get_type(message, &type);
+        if (r < 0) {
+                log_warning("rtnl: could not get message type");
+                return 0;
+        }
+
         r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
         if (r < 0 || ifindex <= 0) {
                 log_warning("rtnl: received link message without valid ifindex");
                 return 0;
-        }
-
-        link_get(m, ifindex, &link);
-        if (!link) {
-                /* link is new, so add it */
-                r = link_add(m, message, &link);
-                if (r < 0) {
-                        log_debug("could not add new link");
-                        return 0;
-                }
-        }
+        } else
+                link_get(m, ifindex, &link);
 
         r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
-        if (r < 0)
+        if (r < 0 || !name) {
                 log_warning("rtnl: received link message without valid ifname");
-        else {
-                NetDev *netdev;
+                return 0;
+        } else
+                netdev_get(m, name, &netdev);
+
+        switch (type) {
+        case RTM_NEWLINK:
+                if (!link) {
+                        /* link is new, so add it */
+                        r = link_add(m, message, &link);
+                        if (r < 0) {
+                                log_debug("could not add new link");
+                                return 0;
+                        }
+                }
 
-                r = netdev_get(m, name, &netdev);
-                if (r >= 0) {
+                if (netdev) {
+                        /* netdev exists, so make sure the ifindex matches */
                         r = netdev_set_ifindex(netdev, message);
                         if (r < 0) {
                                 log_debug("could not set ifindex on netdev");
                                 return 0;
                         }
                 }
-        }
 
-        r = link_update(link, message);
-        if (r < 0)
-                return 0;
+                r = link_update(link, message);
+                if (r < 0)
+                        return 0;
+
+                break;
+
+        case RTM_DELLINK:
+                link_drop(link);
+                netdev_drop(netdev);
+
+                break;
+
+        default:
+                assert_not_reached("Received invalid RTNL message type.");
+        }
 
         return 1;
 }
@@ -351,6 +380,10 @@ int manager_rtnl_listen(Manager *m) {
         if (r < 0)
                 return r;
 
+        r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
+        if (r < 0)
+                return r;
+
         return 0;
 }
 
@@ -457,3 +490,55 @@ int manager_update_resolv_conf(Manager *m) {
 
         return 0;
 }
+
+int manager_save(Manager *m) {
+        Link *link;
+        Iterator i;
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        const char *oper_state = "unknown";
+        bool dormant, carrier;
+        int r;
+
+        assert(m);
+        assert(m->state_file);
+
+        HASHMAP_FOREACH(link, m->links, i) {
+                if (link->flags & IFF_LOOPBACK)
+                        continue;
+
+                if (link_has_carrier(link->flags, link->operstate))
+                        carrier = true;
+                else if (link->operstate == IF_OPER_DORMANT)
+                        dormant = true;
+        }
+
+        if (carrier)
+                oper_state = "carrier";
+        else if (dormant)
+                oper_state = "dormant";
+
+        r = fopen_temporary(m->state_file, &f, &temp_path);
+        if (r < 0)
+                goto finish;
+
+        fchmod(fileno(f), 0644);
+
+        fprintf(f,
+                "# This is private data. Do not parse.\n"
+                "OPER_STATE=%s\n", oper_state);
+
+        fflush(f);
+
+        if (ferror(f) || rename(temp_path, m->state_file) < 0) {
+                r = -errno;
+                unlink(m->state_file);
+                unlink(temp_path);
+        }
+
+finish:
+        if (r < 0)
+                log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
+
+        return r;
+}