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device.c
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/*
* 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>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <libubox/list.h>
#include "netifd.h"
#include "system.h"
#include "config.h"
static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
static struct avl_tree devices;
static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
[DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
[DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_MTU6] = { .name = "mtu6", .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 },
[DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_IP6SEGMENTROUTING] = { .name = "ip6segmentrouting", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
[DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
[DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
[DEV_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
};
const struct uci_blob_param_list device_attr_list = {
.n_params = __DEV_ATTR_MAX,
.params = dev_attrs,
};
static int __devlock = 0;
int device_type_add(struct device_type *devtype)
{
if (device_type_get(devtype->name)) {
netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
devtype->name);
return 1;
}
netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
devtype->name);
list_add(&devtype->list, &devtypes);
return 0;
}
/* Retrieve the device type for the given name. If 'bridge' is true, the type
* must have bridge capabilities
*/
struct device_type *
device_type_get(const char *tname)
{
struct device_type *cur;
list_for_each_entry(cur, &devtypes, list)
if (!strcmp(cur->name, tname))
return cur;
return NULL;
}
void device_lock(void)
{
__devlock++;
}
void device_unlock(void)
{
__devlock--;
if (!__devlock)
device_free_unused(NULL);
}
static int device_vlan_len(struct kvlist *kv, const void *data)
{
return sizeof(unsigned int);
}
void device_vlan_update(bool done)
{
struct device *dev;
avl_for_each_element(&devices, dev, avl) {
if (!dev->vlans.update)
continue;
if (!done) {
if (dev->vlan_aliases.get_len)
kvlist_free(&dev->vlan_aliases);
else
kvlist_init(&dev->vlan_aliases, device_vlan_len);
vlist_update(&dev->vlans);
} else {
vlist_flush(&dev->vlans);
}
}
}
static int set_device_state(struct device *dev, bool state)
{
if (state) {
/* Get ifindex for all devices being enabled so a valid */
/* ifindex is in place avoiding possible race conditions */
device_set_ifindex(dev, system_if_resolve(dev));
if (!dev->ifindex)
return -1;
system_if_get_settings(dev, &dev->orig_settings);
/* Only keep orig settings based on what needs to be set */
dev->orig_settings.valid_flags = dev->orig_settings.flags;
dev->orig_settings.flags &= dev->settings.flags;
system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
system_if_up(dev);
} else {
system_if_down(dev);
system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
}
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(const char *name, struct device_type *devtype,
struct blob_attr *attr)
{
struct blob_attr *tb[__DEV_ATTR_MAX];
struct device *dev = NULL;
/* device type is unused for simple devices */
devtype = 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 simple_device_free(struct device *dev)
{
if (dev->parent.dev)
device_remove_user(&dev->parent);
free(dev);
}
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,
};
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->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
s->txqueuelen : os->txqueuelen;
memcpy(n->macaddr,
(s->flags & (DEV_OPT_MACADDR|DEV_OPT_DEFAULT_MACADDR) ? s->macaddr : os->macaddr),
sizeof(n->macaddr));
n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
n->ip6segmentrouting = s->flags & DEV_OPT_IP6SEGMENTROUTING ? s->ip6segmentrouting : os->ip6segmentrouting;
n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
s->neigh4reachabletime : os->neigh4reachabletime;
n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
s->neigh6reachabletime : os->neigh6reachabletime;
n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
s->neigh4gcstaletime : os->neigh4gcstaletime;
n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
s->neigh6gcstaletime : os->neigh6gcstaletime;
n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
s->neigh4locktime : os->neigh4locktime;
n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
s->dadtransmits : os->dadtransmits;
n->multicast = s->flags & DEV_OPT_MULTICAST ?
s->multicast : os->multicast;
n->multicast_to_unicast = s->multicast_to_unicast;
n->multicast_router = s->multicast_router;
n->multicast_fast_leave = s->multicast_fast_leave;
n->learning = s->learning;
n->unicast_flood = s->unicast_flood;
n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
s->sendredirects : os->sendredirects;
n->flags = s->flags | os->flags | os->valid_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]) && blobmsg_get_u32(cur) >= 68) {
s->mtu = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_MTU;
}
if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
s->mtu6 = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_MTU6;
}
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;
}
}
if ((cur = tb[DEV_ATTR_IPV6])) {
s->ipv6 = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_IPV6;
}
if ((cur = tb[DEV_ATTR_IP6SEGMENTROUTING])) {
s->ip6segmentrouting = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_IP6SEGMENTROUTING;
}
if ((cur = tb[DEV_ATTR_PROMISC])) {
s->promisc = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_PROMISC;
}
if ((cur = tb[DEV_ATTR_RPFILTER])) {
if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
s->flags |= DEV_OPT_RPFILTER;
else
DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
}
if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
s->acceptlocal = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_ACCEPTLOCAL;
}
if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
s->igmpversion = blobmsg_get_u32(cur);
if (s->igmpversion >= 1 && s->igmpversion <= 3)
s->flags |= DEV_OPT_IGMPVERSION;
else
DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
}
if ((cur = tb[DEV_ATTR_MLDVERSION])) {
s->mldversion = blobmsg_get_u32(cur);
if (s->mldversion >= 1 && s->mldversion <= 2)
s->flags |= DEV_OPT_MLDVERSION;
else
DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
}
if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_NEIGHREACHABLETIME;
}
if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_NEIGHGCSTALETIME;
}
if ((cur = tb[DEV_ATTR_NEIGHLOCKTIME])) {
s->neigh4locktime = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_NEIGHLOCKTIME;
}
if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
s->dadtransmits = blobmsg_get_u32(cur);
s->flags |= DEV_OPT_DADTRANSMITS;
}
if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
s->multicast_to_unicast = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
}
if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
s->multicast_router = blobmsg_get_u32(cur);
if (s->multicast_router <= 2)
s->flags |= DEV_OPT_MULTICAST_ROUTER;
else
DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
}
if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
s->multicast_fast_leave = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
}
if ((cur = tb[DEV_ATTR_MULTICAST])) {
s->multicast = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_MULTICAST;
}
if ((cur = tb[DEV_ATTR_LEARNING])) {
s->learning = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_LEARNING;
}
if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
s->unicast_flood = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_UNICAST_FLOOD;
}
if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
s->sendredirects = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_SENDREDIRECTS;
}
if ((cur = tb[DEV_ATTR_ISOLATE])) {
s->isolate = blobmsg_get_bool(cur);
s->flags |= DEV_OPT_ISOLATE;
}
device_set_disabled(dev, disabled);
}
static void __init dev_init(void)
{
avl_init(&devices, avl_strcmp, true, NULL);
}
static int device_broadcast_cb(void *ctx, struct safe_list *list)
{
struct device_user *dep = container_of(list, struct device_user, list);
int *ev = ctx;
/* device might have been removed by an earlier callback */
if (!dep->dev)
return 0;
if (dep->cb)
dep->cb(dep, *ev);
return 0;
}
void device_broadcast_event(struct device *dev, enum device_event ev)
{
int dev_ev = ev;
safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
}
static void
device_fill_default_settings(struct device *dev)
{
struct device_settings *s = &dev->settings;
struct ether_addr *ea;
if (!(s->flags & DEV_OPT_MACADDR)) {
ea = config_get_default_macaddr(dev->ifname);
if (ea) {
memcpy(s->macaddr, ea, 6);
s->flags |= DEV_OPT_DEFAULT_MACADDR;
}
}
}
int device_claim(struct device_user *dep)
{
struct device *dev = dep->dev;
int ret = 0;
if (dep->claimed)
return 0;
if (!dev)
return -1;
dep->claimed = true;
D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
if (++dev->active != 1)
return 0;
device_broadcast_event(dev, DEV_EVENT_SETUP);
device_fill_default_settings(dev);
if (dev->external) {
/* Get ifindex for external claimed devices so a valid */
/* ifindex is in place avoiding possible race conditions */
device_set_ifindex(dev, system_if_resolve(dev));
if (!dev->ifindex)
ret = -1;
system_if_get_settings(dev, &dev->orig_settings);
} else
ret = dev->set_state(dev, true);
if (ret == 0)
device_broadcast_event(dev, DEV_EVENT_UP);
else {
D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
dev->active = 0;
dep->claimed = false;
}
return ret;
}
void device_release(struct device_user *dep)
{
struct device *dev = dep->dev;
if (!dep->claimed)
return;
dep->claimed = false;
dev->active--;
D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
assert(dev->active >= 0);
if (dev->active)
return;
device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
if (!dev->external)
dev->set_state(dev, false);
if (dev->active)
return;
device_broadcast_event(dev, DEV_EVENT_DOWN);
}
int device_check_state(struct device *dev)
{
if (!dev->type->check_state)
return simple_device_type.check_state(dev);
return dev->type->check_state(dev);
}
int device_init_virtual(struct device *dev, struct device_type *type, const char *name)
{
assert(dev);
assert(type);
D(DEVICE, "Initialize device '%s'\n", name ? name : "");
INIT_SAFE_LIST(&dev->users);
INIT_SAFE_LIST(&dev->aliases);
dev->type = type;
if (name) {
int ret;
ret = device_set_ifname(dev, name);
if (ret < 0)
return ret;
}
if (!dev->set_state)
dev->set_state = set_device_state;
return 0;
}
int device_init(struct device *dev, struct device_type *type, const char *ifname)
{
int ret;
ret = device_init_virtual(dev, type, ifname);
if (ret < 0)
return ret;
dev->avl.key = dev->ifname;
ret = avl_insert(&devices, &dev->avl);
if (ret < 0)
return ret;
system_if_clear_state(dev);
return 0;
}
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));
if (!dev)
return NULL;
dev->external = external;
dev->set_state = simple_device_set_state;
if (device_init(dev, &simple_device_type, name) < 0) {
device_cleanup(dev);
free(dev);
return NULL;
}
dev->default_config = true;
if (external)
system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
device_check_state(dev);
return dev;
}
struct device *
device_find(const char *name)
{
struct device *dev;
return avl_find_element(&devices, name, dev, avl);
}
struct device *
device_get(const char *name, int create)
{
struct device *dev;
dev = avl_find_element(&devices, name, dev, avl);
if (!dev && strchr(name, '.'))
return get_vlan_device_chain(name, create);
if (name[0] == '@')
return device_alias_get(name + 1);
if (dev) {
if (create > 1 && !dev->external) {
system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
dev->external = true;
device_set_present(dev, true);
}
return dev;
}
if (!create)
return NULL;
return device_create_default(name, create > 1);
}
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;
}
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);
device_release(dep);
return 0;
}
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;
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);
}
void device_set_link(struct device *dev, bool state)
{
if (dev->link_active == state)
return;
netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
dev->link_active = state;
device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
}
void device_set_ifindex(struct device *dev, int ifindex)
{
if (dev->ifindex == ifindex)
return;
dev->ifindex = ifindex;
device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
}
int device_set_ifname(struct device *dev, const char *name)
{
int ret = 0;
if (!strcmp(dev->ifname, name))
return 0;
if (strlen(name) > sizeof(dev->ifname) - 1)
return -1;
if (dev->avl.key)
avl_delete(&devices, &dev->avl);
strcpy(dev->ifname, name);
if (dev->avl.key)
ret = avl_insert(&devices, &dev->avl);
if (ret == 0)
device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
return ret;
}
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;
}
static void
__device_add_user(struct device_user *dep, struct device *dev)
{
struct safe_list *head;
dep->dev = dev;
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)
dep->cb(dep, DEV_EVENT_UP);
if (dev->link_active)
dep->cb(dep, DEV_EVENT_LINK_UP);
}
}
void device_add_user(struct device_user *dep, struct device *dev)
{
if (dep->dev == dev)
return;
if (dep->dev)
device_remove_user(dep);
if (!dev)
return;
__device_add_user(dep, dev);
}
static 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 (!safe_list_empty(&dev->users) ||
!safe_list_empty(&dev->aliases) ||
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);
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);
}
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;
device_check_state(dev);
}
}
bool
device_check_ip6segmentrouting(void)
{
struct device *dev;
bool ip6segmentrouting = false;
avl_for_each_element(&devices, dev, avl)
ip6segmentrouting |= dev->settings.ip6segmentrouting;
return ip6segmentrouting;
}
static enum dev_change_type
device_set_config(struct device *dev, struct device_type *type,
struct blob_attr *attr)
{
struct blob_attr *tb[__DEV_ATTR_MAX];
const struct uci_blob_param_list *cfg = type->config_params;
if (type != dev->type)
return DEV_CONFIG_RECREATE;
if (dev->type->reload)
return dev->type->reload(dev, attr);
if (uci_blob_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_apply_config(struct device *dev, struct device_type *type,
struct blob_attr *config)
{
enum dev_change_type change;
change = device_set_config(dev, type, config);
if (dev->external) {
system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
change = DEV_CONFIG_APPLIED;
}
switch (change) {
case DEV_CONFIG_RESTART:
case DEV_CONFIG_APPLIED:
D(DEVICE, "Device '%s': config applied\n", dev->ifname);
config = blob_memdup(config);
free(dev->config);
dev->config = config;
if (change == DEV_CONFIG_RESTART && dev->present) {
int ret = 0;
device_set_present(dev, false);
if (dev->active && !dev->external) {
ret = dev->set_state(dev, false);
if (!ret)
ret = dev->set_state(dev, true);
}
if (!ret)
device_set_present(dev, true);
}
break;
case DEV_CONFIG_NO_CHANGE:
D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
break;
case DEV_CONFIG_RECREATE:
break;
}
return change;
}
static void
device_replace(struct device *dev, struct device *odev)
{
struct device_user *dep, *tmp;
__devlock++;
if (odev->present)
device_set_present(odev, false);
list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
device_release(dep);
safe_list_del(&dep->list);
__device_add_user(dep, dev);
}
__devlock--;
device_free(odev);
}
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);
if (!ndev)
continue;
device_replace(ndev, dev);
}
}
struct device *
device_create(const char *name, struct device_type *type,
struct blob_attr *config)
{
struct device *odev = NULL, *dev;
enum dev_change_type change;
odev = device_find(name);
if (odev) {
odev->current_config = true;
change = device_apply_config(odev, type, config);
switch (change) {
case DEV_CONFIG_RECREATE:
D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
device_delete(odev);
break;