interface: support "zone" config option
[project/netifd.git] / interface.c
index 1d1a5f8cb8db260f3e350e5d5e870f26694230a0..255ce84950385bf586e284b14b6727ec4d64d9c1 100644 (file)
@@ -34,8 +34,11 @@ enum {
        IFACE_ATTR_IFNAME, /* Backward compatibility */
        IFACE_ATTR_PROTO,
        IFACE_ATTR_AUTO,
+       IFACE_ATTR_ZONE,
        IFACE_ATTR_JAIL,
+       IFACE_ATTR_JAIL_DEVICE,
        IFACE_ATTR_JAIL_IFNAME,
+       IFACE_ATTR_HOST_DEVICE,
        IFACE_ATTR_DEFAULTROUTE,
        IFACE_ATTR_PEERDNS,
        IFACE_ATTR_DNS,
@@ -60,8 +63,11 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
+       [IFACE_ATTR_ZONE] = { .name = "zone", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_JAIL] = { .name = "jail", .type = BLOBMSG_TYPE_STRING },
+       [IFACE_ATTR_JAIL_DEVICE] = { .name = "jail_device", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_JAIL_IFNAME] = { .name = "jail_ifname", .type = BLOBMSG_TYPE_STRING },
+       [IFACE_ATTR_HOST_DEVICE] = { .name = "host_device", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
@@ -637,8 +643,6 @@ interface_claim_device(struct interface *iface)
        if (iface->parent_iface.iface)
                interface_remove_user(&iface->parent_iface);
 
-       device_lock();
-
        if (iface->parent_ifname) {
                parent = vlist_find(&interfaces, iface->parent_ifname, parent, node);
                iface->parent_iface.cb = interface_alias_cb;
@@ -654,8 +658,6 @@ interface_claim_device(struct interface *iface)
        if (dev)
                interface_set_main_dev(iface, dev);
 
-       device_unlock();
-
        if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
                interface_set_available(iface, true);
 }
@@ -702,8 +704,10 @@ interface_do_free(struct interface *iface)
        avl_delete(&interfaces.avl, &iface->node.avl);
        if (iface->jail)
                free(iface->jail);
-       if (iface->jail_ifname)
-               free(iface->jail_ifname);
+       if (iface->jail_device)
+               free(iface->jail_device);
+       if (iface->host_device)
+               free(iface->host_device);
 
        free(iface);
 }
@@ -830,6 +834,10 @@ interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
        blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
                      blob_data(config), blob_len(config));
 
+       iface->zone = NULL;
+       if ((cur = tb[IFACE_ATTR_ZONE]))
+               iface->zone = strdup(blobmsg_get_string(cur));
+
        if ((cur = tb[IFACE_ATTR_PROTO]))
                proto_name = blobmsg_data(cur);
 
@@ -918,9 +926,15 @@ interface_alloc(const char *name, struct blob_attr *config, bool dynamic)
                iface->autostart = false;
        }
 
-       iface->jail_ifname = NULL;
-       if ((cur = tb[IFACE_ATTR_JAIL_IFNAME]))
-               iface->jail_ifname = strdup(blobmsg_get_string(cur));
+       iface->jail_device = NULL;
+       if ((cur = tb[IFACE_ATTR_JAIL_DEVICE]))
+               iface->jail_device = strdup(blobmsg_get_string(cur));
+       else if ((cur = tb[IFACE_ATTR_JAIL_IFNAME]))
+               iface->jail_device = strdup(blobmsg_get_string(cur));
+
+       iface->host_device = NULL;
+       if ((cur = tb[IFACE_ATTR_HOST_DEVICE]))
+               iface->host_device = strdup(blobmsg_get_string(cur));
 
        return iface;
 }
@@ -1034,12 +1048,13 @@ interface_set_main_dev(struct interface *iface, struct device *dev)
 }
 
 static int
-interface_remove_link(struct interface *iface, struct device *dev)
+interface_remove_link(struct interface *iface, struct device *dev,
+                     struct blob_attr *vlan)
 {
        struct device *mdev = iface->main_dev.dev;
 
        if (mdev && mdev->hotplug_ops)
-               return mdev->hotplug_ops->del(mdev, dev);
+               return mdev->hotplug_ops->del(mdev, dev, vlan);
 
        if (dev == iface->ext_dev.dev)
                device_remove_user(&iface->ext_dev);
@@ -1086,30 +1101,19 @@ interface_handle_link(struct interface *iface, const char *name,
                      struct blob_attr *vlan, bool add, bool link_ext)
 {
        struct device *dev;
-       int ret;
-
-       device_lock();
 
        dev = device_get(name, add ? (link_ext ? 2 : 1) : 0);
-       if (!dev) {
-               ret = UBUS_STATUS_NOT_FOUND;
-               goto out;
-       }
-
-       if (add) {
-               interface_set_device_config(iface, dev);
-               if (!link_ext)
-                       device_set_present(dev, true);
+       if (!dev)
+               return UBUS_STATUS_NOT_FOUND;
 
-               ret = interface_add_link(iface, dev, vlan, link_ext);
-       } else {
-               ret = interface_remove_link(iface, dev);
-       }
+       if (!add)
+               return interface_remove_link(iface, dev, vlan);
 
-out:
-       device_unlock();
+       interface_set_device_config(iface, dev);
+       if (!link_ext)
+               device_set_present(dev, true);
 
-       return ret;
+       return interface_add_link(iface, dev, vlan, link_ext);
 }
 
 void
@@ -1176,104 +1180,29 @@ interface_start_pending(void)
 }
 
 void
-interface_start_jail(const char *jail, const pid_t netns_pid)
+interface_start_jail(int netns_fd, const char *jail)
 {
        struct interface *iface;
-       int netns_fd;
-       int wstatus;
-       pid_t pr = 0;
-
-       netns_fd = system_netns_open(netns_pid);
-       if (netns_fd < 0)
-               return;
-
-       vlist_for_each_element(&interfaces, iface, node) {
-               if (!iface->jail || strcmp(iface->jail, jail))
-                       continue;
-
-               system_link_netns_move(iface->main_dev.dev, netns_fd, iface->jail_ifname);
-       }
 
-       close(netns_fd);
-
-       pr = fork();
-       if (pr) {
-               waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
-               return;
-       }
-
-       /* child process */
-       netns_fd = system_netns_open(netns_pid);
-       if (netns_fd < 0)
-               return;
-
-       system_netns_set(netns_fd);
-       system_init();
        vlist_for_each_element(&interfaces, iface, node) {
                if (!iface->jail || strcmp(iface->jail, jail))
                        continue;
 
-               /*
-                * The interface has already been renamed and is inside target
-                * namespace, hence overwrite ifname with jail_ifname for
-                * interface_set_up().
-                * We are inside a fork which got it's own copy of the interfaces
-                * list, so we can mess with it :)
-                */
-               if (iface->jail_ifname)
-                       iface->device = iface->jail_ifname;
-
-               interface_do_reload(iface);
-               interface_set_up(iface);
+               system_link_netns_move(iface->main_dev.dev, netns_fd, iface->jail_device);
        }
-
-       close(netns_fd);
-       _exit(0);
 }
 
 void
-interface_stop_jail(const char *jail, const pid_t netns_pid)
+interface_stop_jail(int netns_fd)
 {
        struct interface *iface;
-       int netns_fd, root_netns;
-       int wstatus;
-       pid_t parent_pid = getpid();
-       pid_t pr = 0;
-       const char *orig_ifname;
-
-       pr = fork();
-       if (pr) {
-               waitpid(pr, &wstatus, WUNTRACED | WCONTINUED);
-               return;
-       }
+       char *orig_ifname;
 
-       /* child process */
-       root_netns = system_netns_open(parent_pid);
-       if (root_netns < 0)
-               return;
-
-       netns_fd = system_netns_open(netns_pid);
-       if (netns_fd < 0)
-               return;
-
-       system_netns_set(netns_fd);
-       system_init();
        vlist_for_each_element(&interfaces, iface, node) {
-               if (!iface->jail || strcmp(iface->jail, jail))
-                       continue;
-
-               orig_ifname = iface->device;
-               if (iface->jail_ifname)
-                       iface->device = iface->jail_ifname;
-
-               interface_do_reload(iface);
+               orig_ifname = iface->host_device;
                interface_set_down(iface);
-               system_link_netns_move(iface->main_dev.dev, root_netns, orig_ifname);
+               system_link_netns_move(iface->main_dev.dev, netns_fd, orig_ifname);
        }
-
-       close(root_netns);
-       close(netns_fd);
-       _exit(0);
 }
 
 static void
@@ -1391,10 +1320,15 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
        if (if_old->jail)
                if_old->autostart = false;
 
-       if (if_old->jail_ifname)
-               free(if_old->jail_ifname);
+       if (if_old->jail_device)
+               free(if_old->jail_device);
+
+       if_old->jail_device = if_new->jail_device;
+
+       if (if_old->host_device)
+               free(if_old->host_device);
 
-       if_old->jail_ifname = if_new->jail_ifname;
+       if_old->host_device = if_new->host_device;
 
        if_old->device = if_new->device;
        if_old->parent_ifname = if_new->parent_ifname;