#include "config.h"
static struct avl_tree devices;
+static struct avl_tree aliases;
+
+struct alias_device {
+ struct avl_node avl;
+ struct device dev;
+ struct device_user dep;
+ bool cleanup;
+ char name[];
+};
+
+static const struct device_type alias_device_type;
static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
[DEV_ATTR_TYPE] = { "type", BLOBMSG_TYPE_STRING },
- [DEV_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
[DEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
[DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
[DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
.params = dev_attrs,
};
+static int __devlock = 0;
+
+void device_lock(void)
+{
+ __devlock++;
+}
+
+void device_unlock(void)
+{
+ __devlock--;
+ if (!__devlock)
+ device_free_unused(NULL);
+}
+
static struct device *
-simple_device_create(struct blob_attr *attr)
+simple_device_create(const char *name, struct blob_attr *attr)
{
struct blob_attr *tb[__DEV_ATTR_MAX];
struct device *dev = NULL;
- const char *name;
blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
- if (!tb[DEV_ATTR_NAME])
- return NULL;
-
- name = blobmsg_data(tb[DEV_ATTR_NAME]);
- if (!name)
- return NULL;
-
dev = device_get(name, true);
if (!dev)
return NULL;
.free = simple_device_free,
};
+static int
+alias_device_set_state(struct device *dev, bool state)
+{
+ struct alias_device *alias;
+
+ alias = container_of(dev, struct alias_device, dev);
+ if (!alias->dep.dev)
+ return -1;
+
+ if (state)
+ return device_claim(&alias->dep);
+
+ device_release(&alias->dep);
+ if (alias->cleanup)
+ device_remove_user(&alias->dep);
+ return 0;
+}
+
+static struct device *
+alias_device_create(const char *name, struct blob_attr *attr)
+{
+ struct alias_device *alias;
+
+ alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
+ strcpy(alias->name, name);
+ alias->dev.set_state = alias_device_set_state;
+ device_init_virtual(&alias->dev, &alias_device_type, NULL);
+ alias->avl.key = alias->name;
+ avl_insert(&aliases, &alias->avl);
+
+ return &alias->dev;
+}
+
+static void alias_device_free(struct device *dev)
+{
+ struct alias_device *alias;
+
+ device_cleanup(dev);
+
+ alias = container_of(dev, struct alias_device, dev);
+ avl_delete(&aliases, &alias->avl);
+ free(alias);
+}
+
+static const struct device_type alias_device_type = {
+ .name = "Network alias",
+ .create = alias_device_create,
+ .free = alias_device_free,
+};
+
void
device_init_settings(struct device *dev, struct blob_attr **tb)
{
static void __init dev_init(void)
{
- avl_init(&devices, avl_strcmp, false, NULL);
+ avl_init(&devices, avl_strcmp, true, NULL);
+ avl_init(&aliases, avl_strcmp, false, NULL);
}
static void device_broadcast_event(struct device *dev, enum device_event ev)
}
}
+void
+alias_notify_device(const char *name, struct device *dev)
+{
+ struct alias_device *alias;
+
+ 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);
+ }
+ }
+
+ device_set_present(&alias->dev, !!dev);
+
+ if (!dev && alias->dep.dev && !alias->dep.dev->active)
+ device_remove_user(&alias->dep);
+
+ device_unlock();
+}
+
static int set_device_state(struct device *dev, bool state)
{
if (state)
return 0;
dep->claimed = true;
- DPRINTF("claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
+ D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
if (++dev->active != 1)
return 0;
ret = dev->set_state(dev, true);
if (ret == 0)
device_broadcast_event(dev, DEV_EVENT_UP);
- else
+ else {
+ D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
dev->active = 0;
+ dep->claimed = false;
+ }
return ret;
}
dep->claimed = false;
dev->active--;
- DPRINTF("release device %s, new refcount: %d\n", dev->ifname, dev->active);
+ D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
assert(dev->active >= 0);
if (dev->active)
device_broadcast_event(dev, DEV_EVENT_DOWN);
}
-int check_device_state(struct device *dev)
+int device_check_state(struct device *dev)
{
if (!dev->type->check_state)
return 0;
if (name)
strncpy(dev->ifname, name, IFNAMSIZ);
- DPRINTF("Initialize device '%s'\n", dev->ifname);
+ D(DEVICE, "Initialize device '%s'\n", dev->ifname);
INIT_LIST_HEAD(&dev->users);
dev->type = type;
}
if (ret < 0)
return ret;
- check_device_state(dev);
+ system_if_clear_state(dev);
+ device_check_state(dev);
return 0;
}
-struct device *device_get(const char *name, bool create)
+static struct device *
+device_create_default(const char *name)
+{
+ struct device *dev;
+
+ D(DEVICE, "Create simple device '%s'\n", name);
+ dev = calloc(1, sizeof(*dev));
+ device_init(dev, &simple_device_type, name);
+ dev->default_config = true;
+ return dev;
+}
+
+static struct device *
+device_alias_get(const char *name)
+{
+ struct alias_device *alias;
+
+ alias = avl_find_element(&aliases, name, alias, avl);
+ if (alias)
+ return &alias->dev;
+
+ return alias_device_create(name, NULL);
+}
+
+struct device *
+device_get(const char *name, bool create)
{
struct device *dev;
if (strchr(name, '.'))
return get_vlan_device_chain(name, create);
+ if (name[0] == '@')
+ return device_alias_get(name + 1);
+
dev = avl_find_element(&devices, name, dev, avl);
if (dev)
return dev;
if (!create)
return NULL;
- dev = calloc(1, sizeof(*dev));
- device_init(dev, &simple_device_type, name);
+ return device_create_default(name);
+}
- return dev;
+static void
+device_delete(struct device *dev)
+{
+ if (!dev->avl.key)
+ return;
+
+ D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
+ avl_delete(&devices, &dev->avl);
+ dev->avl.key = NULL;
}
void device_cleanup(struct device *dev)
{
struct device_user *dep, *tmp;
- DPRINTF("Clean up device '%s'\n", dev->ifname);
+ D(DEVICE, "Clean up device '%s'\n", dev->ifname);
list_for_each_entry_safe(dep, tmp, &dev->users, list) {
if (!dep->cb)
continue;
dep->cb(dep, DEV_EVENT_REMOVE);
+ device_release(dep);
}
- if (dev->avl.key)
- avl_delete(&devices, &dev->avl);
+ device_delete(dev);
}
void device_set_present(struct device *dev, bool state)
if (dev->present == state)
return;
- DPRINTF("Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
+ D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
dev->present = state;
device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
}
static void
__device_free_unused(struct device *dev)
{
- if (!list_empty(&dev->users))
+ if (!list_empty(&dev->users) || dev->current_config || config_init)
return;
device_free(dev);
{
struct device *dev = dep->dev;
+ if (!dep->dev)
+ return;
+
+ dep->hotplug = false;
if (dep->claimed)
device_release(dep);
__device_free_unused(dev);
}
+void
+device_init_pending(void)
+{
+ struct device *dev, *tmp;
+
+ avl_for_each_element_safe(&devices, dev, avl, tmp) {
+ if (!dev->config_pending)
+ continue;
+
+ dev->type->config_init(dev);
+ dev->config_pending = false;
+ }
+}
+
+static enum dev_change_type
+device_reload_config(struct device *dev, struct blob_attr *attr)
+{
+ struct blob_attr *tb[__DEV_ATTR_MAX];
+ const struct config_param_list *cfg = dev->type->config_params;
+
+ if (config_check_equal(dev->config, attr, cfg))
+ return DEV_CONFIG_NO_CHANGE;
+
+ if (cfg == &device_attr_list) {
+ memset(tb, 0, sizeof(tb));
+
+ if (attr)
+ blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
+ blob_data(attr), blob_len(attr));
+
+ device_init_settings(dev, tb);
+ return DEV_CONFIG_APPLIED;
+ } else
+ return DEV_CONFIG_RECREATE;
+}
+
+enum dev_change_type
+device_set_config(struct device *dev, const struct device_type *type,
+ struct blob_attr *attr)
+{
+ if (type != dev->type)
+ return DEV_CONFIG_RECREATE;
+
+ if (dev->type->reload)
+ return dev->type->reload(dev, attr);
+
+ return device_reload_config(dev, attr);
+}
+
+static void
+device_replace(struct device *dev, struct device *odev)
+{
+ struct device_user *dep, *tmp;
+ bool present = odev->present;
+
+ if (present)
+ device_set_present(odev, false);
+
+ list_for_each_entry_safe(dep, tmp, &odev->users, list) {
+ device_release(dep);
+ list_move_tail(&dep->list, &dev->users);
+ dep->dev = dev;
+ }
+ device_free(odev);
+
+ if (present)
+ device_set_present(dev, true);
+}
+
+void
+device_reset_config(void)
+{
+ struct device *dev;
+
+ avl_for_each_element(&devices, dev, avl)
+ dev->current_config = false;
+}
+
+void
+device_reset_old(void)
+{
+ struct device *dev, *tmp, *ndev;
+
+ avl_for_each_element_safe(&devices, dev, avl, tmp) {
+ if (dev->current_config || dev->default_config)
+ continue;
+
+ if (dev->type != &simple_device_type)
+ continue;
+
+ ndev = device_create_default(dev->ifname);
+ device_replace(ndev, dev);
+ }
+}
+
struct device *
device_create(const char *name, const struct device_type *type,
struct blob_attr *config)
{
- struct device *dev;
+ struct device *odev = NULL, *dev;
+ enum dev_change_type change;
- dev = device_get(name, false);
- if (dev)
- return dev;
+ config = config_memdup(config);
+ if (!config)
+ return NULL;
+
+ odev = device_get(name, false);
+ if (odev) {
+ odev->current_config = true;
+ change = device_set_config(odev, type, config);
+ switch (change) {
+ case DEV_CONFIG_APPLIED:
+ D(DEVICE, "Device '%s': config applied\n", odev->ifname);
+ free(odev->config);
+ odev->config = config;
+ if (odev->present) {
+ device_set_present(odev, false);
+ device_set_present(odev, true);
+ }
+ return odev;
+ case DEV_CONFIG_NO_CHANGE:
+ D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
+ free(config);
+ return odev;
+ case DEV_CONFIG_RECREATE:
+ D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
+ device_delete(odev);
+ break;
+ }
+ } else
+ D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
- return type->create(config);
+ dev = type->create(name, config);
+ if (!dev)
+ return NULL;
+
+ dev->current_config = true;
+ dev->config = config;
+ if (odev)
+ device_replace(dev, odev);
+
+ if (!config_init && dev->config_pending)
+ type->config_init(dev);
+
+ return dev;
+}
+
+void
+device_dump_status(struct blob_buf *b, struct device *dev)
+{
+ void *c, *s;
+
+ if (!dev) {
+ avl_for_each_element(&devices, dev, avl) {
+ if (!dev->present)
+ continue;
+ c = blobmsg_open_table(b, dev->ifname);
+ device_dump_status(b, dev);
+ blobmsg_close_table(b, c);
+ }
+
+ return;
+ }
+
+ if (!dev->present)
+ return;
+
+ blobmsg_add_string(b, "type", dev->type->name);
+ blobmsg_add_u8(b, "up", !!dev->active);
+ if (dev->type->dump_info)
+ dev->type->dump_info(dev, b);
+
+ s = blobmsg_open_table(b, "statistics");
+ if (dev->type->dump_stats)
+ dev->type->dump_stats(dev, b);
+ else
+ system_if_dump_stats(dev, b);
+ blobmsg_close_table(b, s);
}
projects / project / netifd.git / blobdiff