#include <stdio.h>
#include <assert.h>
-#include <libubox/uapi.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/ethernet.h>
+
+#ifdef linux
+#include <netinet/ether.h>
+#endif
#include "netifd.h"
#include "system.h"
+#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_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
+ [DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
+ [DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
+ [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
+ [DEV_ATTR_ENABLED] = { "enabled", BLOBMSG_TYPE_BOOL },
+};
+
+const struct config_param_list device_attr_list = {
+ .n_params = __DEV_ATTR_MAX,
+ .params = dev_attrs,
+};
+
+static int __devlock = 0;
+
+void device_lock(void)
+{
+ __devlock++;
+}
-static int avl_strcmp(const void *k1, const void *k2, void *ptr)
+void device_unlock(void)
+{
+ __devlock--;
+ if (!__devlock)
+ device_free_unused(NULL);
+}
+
+static int set_device_state(struct device *dev, bool state)
{
- return strcmp(k1, k2);
+ if (state)
+ system_if_up(dev);
+ else
+ system_if_down(dev);
+
+ return 0;
}
-static void API_CTOR dev_init(void)
+static int
+simple_device_set_state(struct device *dev, bool state)
{
- avl_init(&devices, avl_strcmp, false, NULL);
+ struct device *pdev;
+ int ret = 0;
+
+ pdev = dev->parent.dev;
+ if (state && !pdev) {
+ pdev = system_if_get_parent(dev);
+ if (pdev)
+ device_add_user(&dev->parent, pdev);
+ }
+
+ if (pdev) {
+ if (state)
+ ret = device_claim(&dev->parent);
+ else
+ device_release(&dev->parent);
+
+ if (ret < 0)
+ return ret;
+ }
+ return set_device_state(dev, state);
+}
+
+static struct device *
+simple_device_create(const char *name, struct blob_attr *attr)
+{
+ struct blob_attr *tb[__DEV_ATTR_MAX];
+ struct device *dev = NULL;
+
+ blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
+ dev = device_get(name, true);
+ if (!dev)
+ return NULL;
+
+ dev->set_state = simple_device_set_state;
+ device_init_settings(dev, tb);
+
+ return dev;
}
-static void free_device(struct device *dev)
+static void simple_device_free(struct device *dev)
{
- cleanup_device(dev);
+ if (dev->parent.dev)
+ device_remove_user(&dev->parent);
free(dev);
}
-static void broadcast_device_event(struct device *dev, enum device_event ev)
+const struct device_type simple_device_type = {
+ .name = "Network device",
+ .config_params = &device_attr_list,
+
+ .create = simple_device_create,
+ .check_state = system_if_check,
+ .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;
+
+ 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,
+};
+
+static void
+device_merge_settings(struct device *dev, struct device_settings *n)
+{
+ struct device_settings *os = &dev->orig_settings;
+ struct device_settings *s = &dev->settings;
+
+ memset(n, 0, sizeof(*n));
+ n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
+ n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
+ s->txqueuelen : os->txqueuelen;
+ memcpy(n->macaddr,
+ (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
+ sizeof(n->macaddr));
+ n->flags = s->flags | os->flags;
+}
+
+void
+device_init_settings(struct device *dev, struct blob_attr **tb)
+{
+ struct device_settings *s = &dev->settings;
+ struct blob_attr *cur;
+ struct ether_addr *ea;
+ bool disabled = false;
+
+ s->flags = 0;
+ if ((cur = tb[DEV_ATTR_ENABLED]))
+ disabled = !blobmsg_get_bool(cur);
+
+ if ((cur = tb[DEV_ATTR_MTU])) {
+ s->mtu = blobmsg_get_u32(cur);
+ s->flags |= DEV_OPT_MTU;
+ }
+
+ if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
+ s->txqueuelen = blobmsg_get_u32(cur);
+ s->flags |= DEV_OPT_TXQUEUELEN;
+ }
+
+ if ((cur = tb[DEV_ATTR_MACADDR])) {
+ ea = ether_aton(blobmsg_data(cur));
+ if (ea) {
+ memcpy(s->macaddr, ea, 6);
+ s->flags |= DEV_OPT_MACADDR;
+ }
+ }
+
+ device_set_disabled(dev, disabled);
+}
+
+static void __init dev_init(void)
+{
+ 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)
{
struct device_user *dep, *tmp;
}
}
-static int set_device_state(struct device *dev, bool state)
+void
+alias_notify_device(const char *name, struct device *dev)
{
- if (state)
- system_if_up(dev);
- else
- system_if_down(dev);
+ struct alias_device *alias;
- return 0;
+ 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();
}
-int claim_device(struct device *dev)
+int device_claim(struct device_user *dep)
{
+ struct device *dev = dep->dev;
int ret;
- DPRINTF("claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
+ if (dep->claimed)
+ return 0;
+
+ dep->claimed = true;
+ D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
if (++dev->active != 1)
return 0;
- broadcast_device_event(dev, DEV_EVENT_SETUP);
+ device_broadcast_event(dev, DEV_EVENT_SETUP);
ret = dev->set_state(dev, true);
if (ret == 0)
- broadcast_device_event(dev, DEV_EVENT_UP);
- else
+ device_broadcast_event(dev, DEV_EVENT_UP);
+ else {
+ D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
dev->active = 0;
+ dep->claimed = false;
+ }
return ret;
}
-void release_device(struct device *dev)
+void device_release(struct device_user *dep)
{
+ struct device *dev = dep->dev;
+
+ if (!dep->claimed)
+ return;
+
+ 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)
return;
- broadcast_device_event(dev, DEV_EVENT_TEARDOWN);
- dev->set_state(dev, false);
- broadcast_device_event(dev, DEV_EVENT_DOWN);
+ device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
+ if (!dep->hotplug)
+ dev->set_state(dev, false);
+ 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;
return dev->type->check_state(dev);
}
-void init_virtual_device(struct device *dev, const struct device_type *type, const char *name)
+void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
{
assert(dev);
assert(type);
- fprintf(stderr, "Initialize interface '%s'\n", dev->ifname);
- INIT_LIST_HEAD(&dev->users);
- dev->type = type;
-
if (name)
strncpy(dev->ifname, name, IFNAMSIZ);
+
+ D(DEVICE, "Initialize device '%s'\n", dev->ifname);
+ INIT_LIST_HEAD(&dev->users);
+ dev->type = type;
}
-int init_device(struct device *dev, const struct device_type *type, const char *ifname)
+int device_init(struct device *dev, const struct device_type *type, const char *ifname)
{
int ret;
- init_virtual_device(dev, type, ifname);
+ device_init_virtual(dev, type, ifname);
if (!dev->set_state)
dev->set_state = set_device_state;
if (ret < 0)
return ret;
- check_device_state(dev);
+ system_if_clear_state(dev);
+ device_check_state(dev);
return 0;
}
-struct device *get_device(const char *name, bool create)
+static struct device *
+device_create_default(const char *name, bool external)
{
- static const struct device_type simple_type = {
- .name = "Device",
- .check_state = system_if_check,
- .free = free_device,
- };
struct device *dev;
+ D(DEVICE, "Create simple device '%s'\n", name);
+ dev = calloc(1, sizeof(*dev));
+ dev->external = external;
+ dev->set_state = simple_device_set_state;
+ 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, int 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));
- init_device(dev, &simple_type, name);
+ return device_create_default(name, create > 1);
+}
- 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 cleanup_device(struct device *dev)
+void device_cleanup(struct device *dev)
{
struct device_user *dep, *tmp;
- fprintf(stderr, "Clean up interface '%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 set_device_present(struct device *dev, bool state)
+static 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" );
dev->present = state;
- broadcast_device_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
+ device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
}
-void add_device_user(struct device_user *dep, struct device *dev)
+void device_set_present(struct device *dev, bool state)
{
+ if (dev->sys_present == state)
+ return;
+
+ dev->sys_present = state;
+ D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
+
+ if (state && dev->disabled)
+ return;
+
+ __device_set_present(dev, state);
+}
+
+void
+device_set_disabled(struct device *dev, bool value)
+{
+ dev->disabled = value;
+ if (dev->sys_present)
+ __device_set_present(dev, !value);
+}
+
+void device_add_user(struct device_user *dep, struct device *dev)
+{
+ if (dep->dev)
+ device_remove_user(dep);
+
dep->dev = dev;
- list_add(&dep->list, &dev->users);
+ list_add_tail(&dep->list, &dev->users);
if (dep->cb && dev->present) {
dep->cb(dep, DEV_EVENT_ADD);
if (dev->active)
}
}
-void remove_device_user(struct device_user *dep)
+void
+device_free(struct device *dev)
+{
+ __devlock++;
+ free(dev->config);
+ device_cleanup(dev);
+ dev->type->free(dev);
+ __devlock--;
+}
+
+static void
+__device_free_unused(struct device *dev)
+{
+ if (!list_empty(&dev->users) || dev->current_config || __devlock)
+ return;
+
+ device_free(dev);
+}
+
+void device_remove_user(struct device_user *dep)
{
struct device *dev = dep->dev;
+ if (!dep->dev)
+ return;
+
+ dep->hotplug = false;
+ if (dep->claimed)
+ device_release(dep);
+
list_del(&dep->list);
+ dep->dev = NULL;
+ __device_free_unused(dev);
+}
- if (list_empty(&dev->users)) {
- /* all references have gone away, remove this interface */
- dev->type->free(dev);
+void
+device_free_unused(struct device *dev)
+{
+ struct device *tmp;
+
+ if (dev)
+ return __device_free_unused(dev);
+
+ avl_for_each_element_safe(&devices, dev, avl, tmp)
+ __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;
}
+}
- dep->dev = NULL;
+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_RESTART;
+ } 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, dev->external);
+ device_replace(ndev, dev);
+ }
+}
+
+struct device *
+device_create(const char *name, const struct device_type *type,
+ struct blob_attr *config)
+{
+ struct device *odev = NULL, *dev;
+ enum dev_change_type change;
+
+ 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_RESTART:
+ case DEV_CONFIG_APPLIED:
+ D(DEVICE, "Device '%s': config applied\n", odev->ifname);
+ free(odev->config);
+ odev->config = config;
+ if (change == DEV_CONFIG_RESTART && 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);
+
+ 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)
+{
+ struct device_settings st;
+ 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);
+ else
+ system_if_dump_info(dev, b);
+
+ if (dev->active) {
+ device_merge_settings(dev, &st);
+ if (st.flags & DEV_OPT_MTU)
+ blobmsg_add_u32(b, "mtu", st.mtu);
+ if (st.flags & DEV_OPT_MACADDR)
+ blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
+ if (st.flags & DEV_OPT_TXQUEUELEN)
+ blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
+ }
+
+ 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);
}