#include "netifd.h"
#include "device.h"
+#include "interface.h"
static struct avl_tree aliases;
struct avl_node avl;
struct device dev;
struct device_user dep;
- bool cleanup;
+ struct device_user new_dep;
+ bool update;
char name[];
};
static const struct device_type alias_device_type;
+static void alias_set_device(struct alias_device *alias, struct device *dev)
+{
+ if (dev == alias->dep.dev)
+ return;
+
+ device_set_present(&alias->dev, false);
+ device_remove_user(&alias->new_dep);
+ if (alias->dev.active) {
+ if (dev)
+ device_add_user(&alias->new_dep, dev);
+
+ alias->update = true;
+ return;
+ }
+
+ alias->update = false;
+ device_remove_user(&alias->dep);
+ alias->dev.hidden = !dev;
+ if (dev) {
+ alias->dev.ifindex = dev->ifindex;
+ strcpy(alias->dev.ifname, dev->ifname);
+ device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
+ device_add_user(&alias->dep, dev);
+ } else {
+ alias->dev.ifname[0] = 0;
+ device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
+ }
+}
+
static int
alias_device_set_state(struct device *dev, bool state)
{
return device_claim(&alias->dep);
device_release(&alias->dep);
- if (alias->cleanup)
- device_remove_user(&alias->dep);
+ if (alias->update)
+ alias_set_device(alias, alias->new_dep.dev);
+
return 0;
}
+static void alias_device_cb(struct device_user *dep, enum device_event ev)
+{
+ struct alias_device *alias;
+ bool present = false;
+
+ alias = container_of(dep, struct alias_device, dep);
+ switch (ev) {
+ case DEV_EVENT_ADD:
+ present = true;
+ case DEV_EVENT_REMOVE:
+ device_set_present(&alias->dev, present);
+ break;
+ default:
+ device_broadcast_event(&alias->dev, ev);
+ break;
+ }
+}
+
static struct device *
alias_device_create(const char *name, struct blob_attr *attr)
{
device_init_virtual(&alias->dev, &alias_device_type, NULL);
alias->avl.key = alias->name;
avl_insert(&aliases, &alias->avl);
+ alias->dep.alias = true;
+ alias->dep.cb = alias_device_cb;
+ device_check_state(&alias->dev);
return &alias->dev;
}
free(alias);
}
+static int alias_check_state(struct device *dev)
+{
+ struct alias_device *alias;
+ struct interface *iface;
+ struct device *ndev = NULL;
+
+ alias = container_of(dev, struct alias_device, dev);
+
+ iface = vlist_find(&interfaces, alias->name, iface, node);
+ if (iface && iface->state == IFS_UP)
+ ndev = iface->l3_dev.dev;
+
+ alias_set_device(alias, ndev);
+
+ return 0;
+}
+
static const struct device_type alias_device_type = {
.name = "Network alias",
.create = alias_device_create,
.free = alias_device_free,
+ .check_state = alias_check_state,
};
void
device_lock();
alias = avl_find_element(&aliases, name, alias, avl);
- if (!alias)
- return;
-
- alias->cleanup = !dev;
- if (dev) {
- if (dev != alias->dep.dev) {
- device_remove_user(&alias->dep);
- strcpy(alias->dev.ifname, dev->ifname);
- device_add_user(&alias->dep, dev);
- alias->dev.hidden = false;
- device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
- }
- }
-
- device_set_present(&alias->dev, !!dev);
-
- if (!dev && alias->dep.dev && !alias->dep.dev->active) {
- device_remove_user(&alias->dep);
- alias->dev.hidden = true;
- alias->dev.ifname[0] = 0;
- device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
- }
+ if (alias)
+ alias_set_device(alias, dev);
device_unlock();
}