+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
static struct avl_tree devices;
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 },
- [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
+ [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
+ [DEV_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_ARRAY },
+ [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
+ [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
+ [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
+ [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
};
-const struct config_param_list device_attr_list = {
+const struct uci_blob_param_list device_attr_list = {
.n_params = __DEV_ATTR_MAX,
.params = dev_attrs,
};
+static int __devlock = 0;
+
+void device_lock(void)
+{
+ __devlock++;
+}
+
+void device_unlock(void)
+{
+ __devlock--;
+ if (!__devlock)
+ device_free_unused(NULL);
+}
+
+static int set_device_state(struct device *dev, bool state)
+{
+ if (state)
+ system_if_up(dev);
+ else
+ system_if_down(dev);
+
+ return 0;
+}
+
+static int
+simple_device_set_state(struct device *dev, bool state)
+{
+ 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(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;
+ dev->set_state = simple_device_set_state;
device_init_settings(dev, tb);
return dev;
static void simple_device_free(struct device *dev)
{
- device_cleanup(dev);
+ if (dev->parent.dev)
+ device_remove_user(&dev->parent);
free(dev);
}
.free = simple_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;
- dev->flags = 0;
+ s->flags = 0;
+ if ((cur = tb[DEV_ATTR_ENABLED]))
+ disabled = !blobmsg_get_bool(cur);
if ((cur = tb[DEV_ATTR_MTU])) {
- dev->mtu = blobmsg_get_u32(cur);
- dev->flags |= DEV_OPT_MTU;
+ s->mtu = blobmsg_get_u32(cur);
+ s->flags |= DEV_OPT_MTU;
}
if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
- dev->txqueuelen = blobmsg_get_u32(cur);
- dev->flags |= DEV_OPT_TXQUEUELEN;
+ s->txqueuelen = blobmsg_get_u32(cur);
+ s->flags |= DEV_OPT_TXQUEUELEN;
}
if ((cur = tb[DEV_ATTR_MACADDR])) {
- ea = ether_aton(blob_data(cur));
+ ea = ether_aton(blobmsg_data(cur));
if (ea) {
- memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
- dev->flags |= DEV_OPT_MACADDR;
+ 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);
}
-static void device_broadcast_event(struct device *dev, enum device_event ev)
+static int device_broadcast_cb(void *ctx, struct safe_list *list)
{
- struct device_user *dep, *tmp;
+ struct device_user *dep = container_of(list, struct device_user, list);
+ int *ev = ctx;
- list_for_each_entry_safe(dep, tmp, &dev->users, list) {
- if (!dep->cb)
- continue;
-
- dep->cb(dep, ev);
- }
+ if (dep->cb)
+ dep->cb(dep, *ev);
+ return 0;
}
-static int set_device_state(struct device *dev, bool state)
+void device_broadcast_event(struct device *dev, enum device_event ev)
{
- if (state)
- system_if_up(dev);
- else
- system_if_down(dev);
+ int dev_ev = ev;
- return 0;
+ safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
+ safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
}
int device_claim(struct device_user *dep)
return 0;
dep->claimed = true;
- D(DEVICE, "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 %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
dev->active = 0;
+ dep->claimed = false;
+ }
return ret;
}
dep->claimed = false;
dev->active--;
- D(DEVICE, "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;
device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
- dev->set_state(dev, false);
+ if (!dep->hotplug)
+ dev->set_state(dev, false);
device_broadcast_event(dev, DEV_EVENT_DOWN);
}
strncpy(dev->ifname, name, IFNAMSIZ);
D(DEVICE, "Initialize device '%s'\n", dev->ifname);
- INIT_LIST_HEAD(&dev->users);
+ INIT_SAFE_LIST(&dev->users);
+ INIT_SAFE_LIST(&dev->aliases);
dev->type = type;
+
+ if (!dev->set_state)
+ dev->set_state = set_device_state;
}
int device_init(struct device *dev, const struct device_type *type, const char *ifname)
device_init_virtual(dev, type, ifname);
- if (!dev->set_state)
- dev->set_state = set_device_state;
-
dev->avl.key = dev->ifname;
ret = avl_insert(&devices, &dev->avl);
if (ret < 0)
return ret;
+ 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, bool external)
+{
+ struct device *dev;
+
+ if (!external && system_if_force_external(name))
+ return NULL;
+
+ 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;
+}
+
+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)
+ if (dev) {
+ if (create > 1 && !dev->external) {
+ dev->external = true;
+ device_set_present(dev, true);
+ }
return dev;
+ }
if (!create)
return NULL;
- dev = calloc(1, sizeof(*dev));
- device_init(dev, &simple_device_type, name);
-
- return dev;
+ return device_create_default(name, create > 1);
}
-void device_cleanup(struct device *dev)
+static void
+device_delete(struct device *dev)
{
- struct device_user *dep, *tmp;
+ if (!dev->avl.key)
+ return;
- D(DEVICE, "Clean up device '%s'\n", dev->ifname);
- list_for_each_entry_safe(dep, tmp, &dev->users, list) {
- if (!dep->cb)
- continue;
+ D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
+ avl_delete(&devices, &dev->avl);
+ dev->avl.key = NULL;
+}
+static int device_cleanup_cb(void *ctx, struct safe_list *list)
+{
+ struct device_user *dep = container_of(list, struct device_user, list);
+ if (dep->cb)
dep->cb(dep, DEV_EVENT_REMOVE);
- }
- if (dev->avl.key)
- avl_delete(&devices, &dev->avl);
+ device_release(dep);
+ return 0;
}
-void device_set_present(struct device *dev, bool state)
+void device_cleanup(struct device *dev)
+{
+ D(DEVICE, "Clean up device '%s'\n", dev->ifname);
+ safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
+ safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
+ device_delete(dev);
+}
+
+static void __device_set_present(struct device *dev, bool state)
{
if (dev->present == state)
return;
- D(DEVICE, "Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
dev->present = state;
device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
}
+void
+device_refresh_present(struct device *dev)
+{
+ bool state = dev->sys_present;
+
+ if (dev->disabled || dev->deferred)
+ state = false;
+
+ __device_set_present(dev, state);
+}
+
+void device_set_present(struct device *dev, bool state)
+{
+ if (dev->sys_present == state)
+ return;
+
+ D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
+ dev->sys_present = state;
+ device_refresh_present(dev);
+}
+
+static int device_refcount(struct device *dev)
+{
+ struct list_head *list;
+ int count = 0;
+
+ list_for_each(list, &dev->users.list)
+ count++;
+
+ list_for_each(list, &dev->aliases.list)
+ count++;
+
+ return count;
+}
+
void device_add_user(struct device_user *dep, struct device *dev)
{
+ struct safe_list *head;
+
+ if (dep->dev == dev)
+ return;
+
+ if (dep->dev)
+ device_remove_user(dep);
+
+ if (!dev)
+ return;
+
dep->dev = dev;
- list_add_tail(&dep->list, &dev->users);
+
+ if (dep->alias)
+ head = &dev->aliases;
+ else
+ head = &dev->users;
+
+ safe_list_add(&dep->list, head);
+ D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
+
if (dep->cb && dev->present) {
dep->cb(dep, DEV_EVENT_ADD);
if (dev->active)
}
}
+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))
+ if (!safe_list_empty(&dev->users) ||
+ !safe_list_empty(&dev->aliases) ||
+ dev->current_config || __devlock)
return;
device_free(dev);
{
struct device *dev = dep->dev;
+ if (!dep->dev)
+ return;
+
+ dep->hotplug = false;
if (dep->claimed)
device_release(dep);
- list_del(&dep->list);
+ safe_list_del(&dep->list);
dep->dev = NULL;
+ D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
__device_free_unused(dev);
}
__device_free_unused(dev);
}
-enum dev_change_type
-device_reload_config(struct device *dev, struct blob_attr *attr)
+void
+device_init_pending(void)
{
- struct blob_attr *tb[__DEV_ATTR_MAX], *tb1[__DEV_ATTR_MAX];
+ struct device *dev, *tmp;
- blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
- blob_data(attr), blob_len(attr));
- if (dev->config)
- blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb1,
- blob_data(dev->config), blob_len(dev->config));
- else
- memset(tb1, 0, sizeof(tb1));
+ avl_for_each_element_safe(&devices, dev, avl, tmp) {
+ if (!dev->config_pending)
+ continue;
+
+ dev->type->config_init(dev);
+ dev->config_pending = false;
+ }
+}
- if (!config_diff(tb, tb1, &device_attr_list, 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 uci_blob_param_list *cfg = dev->type->config_params;
+
+ if (uci_blob_check_equal(dev->config, attr, cfg))
return DEV_CONFIG_NO_CHANGE;
- device_init_settings(dev, tb);
- return DEV_CONFIG_APPLIED;
+ 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;
}
-static enum dev_change_type
-device_check_config(struct device *dev, struct blob_attr *attr)
+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);
if (present)
device_set_present(odev, false);
- list_for_each_entry_safe(dep, tmp, &odev->users, list) {
- device_remove_user(dep);
- device_add_user(dep, dev);
+ list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
+ device_release(dep);
+ safe_list_del(&dep->list);
+ safe_list_add(&dep->list, &dev->users);
+ dep->dev = dev;
}
device_free(odev);
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;
- D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
+ config = blob_memdup(config);
+ if (!config)
+ return NULL;
+
odev = device_get(name, false);
if (odev) {
- change = device_check_config(odev, config);
+ odev->current_config = true;
+ change = device_set_config(odev, type, config);
+ if (odev->external) {
+ system_if_apply_settings(odev, &odev->settings);
+ change = DEV_CONFIG_APPLIED;
+ }
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_memdup(config);
- if (odev->present) {
+ odev->config = config;
+ if (change == DEV_CONFIG_RESTART && odev->present) {
device_set_present(odev, false);
device_set_present(odev, true);
}
- /* fall through */
+ 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 = type->create(config);
- dev->config = config_memdup(config);
+ 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;
+ }
+
+ blobmsg_add_u8(b, "external", dev->external);
+ blobmsg_add_u8(b, "present", dev->present);
+ blobmsg_add_string(b, "type", dev->type->name);
+
+ if (!dev->present)
+ return;
+
+ 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", format_macaddr(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);
+}