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bridge.c
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bridge.c
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/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <[email protected]>
*
* 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 <errno.h>
#include "netifd.h"
#include "device.h"
#include "interface.h"
#include "system.h"
#include "ubus.h"
enum {
BRIDGE_ATTR_PORTS,
BRIDGE_ATTR_STP,
BRIDGE_ATTR_FORWARD_DELAY,
BRIDGE_ATTR_PRIORITY,
BRIDGE_ATTR_IGMP_SNOOP,
BRIDGE_ATTR_AGEING_TIME,
BRIDGE_ATTR_HELLO_TIME,
BRIDGE_ATTR_MAX_AGE,
BRIDGE_ATTR_BRIDGE_EMPTY,
BRIDGE_ATTR_MULTICAST_QUERIER,
BRIDGE_ATTR_HASH_MAX,
BRIDGE_ATTR_ROBUSTNESS,
BRIDGE_ATTR_QUERY_INTERVAL,
BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL,
BRIDGE_ATTR_LAST_MEMBER_INTERVAL,
BRIDGE_ATTR_VLAN_FILTERING,
BRIDGE_ATTR_HAS_VLANS,
BRIDGE_ATTR_STP_KERNEL,
BRIDGE_ATTR_STP_PROTO,
__BRIDGE_ATTR_MAX
};
static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
[BRIDGE_ATTR_PORTS] = { "ports", BLOBMSG_TYPE_ARRAY },
[BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_BRIDGE_EMPTY] = { "bridge_empty", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_MULTICAST_QUERIER] = { "multicast_querier", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_HASH_MAX] = { "hash_max", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_ROBUSTNESS] = { "robustness", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_QUERY_INTERVAL] = { "query_interval", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL] = { "query_response_interval", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_LAST_MEMBER_INTERVAL] = { "last_member_interval", BLOBMSG_TYPE_INT32 },
[BRIDGE_ATTR_VLAN_FILTERING] = { "vlan_filtering", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_HAS_VLANS] = { "__has_vlans", BLOBMSG_TYPE_BOOL }, /* internal */
[BRIDGE_ATTR_STP_KERNEL] = { "stp_kernel", BLOBMSG_TYPE_BOOL },
[BRIDGE_ATTR_STP_PROTO] = { "stp_proto", BLOBMSG_TYPE_STRING },
};
static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
[BRIDGE_ATTR_PORTS] = { .type = BLOBMSG_TYPE_STRING },
};
static const struct uci_blob_param_list bridge_attr_list = {
.n_params = __BRIDGE_ATTR_MAX,
.params = bridge_attrs,
.info = bridge_attr_info,
.n_next = 1,
.next = { &device_attr_list },
};
static struct blob_buf b;
static struct device *bridge_create(const char *name, struct device_type *devtype,
struct blob_attr *attr);
static void bridge_config_init(struct device *dev);
static void bridge_dev_vlan_update(struct device *dev);
static void bridge_free(struct device *dev);
static void bridge_stp_init(struct device *dev);
static void bridge_dump_info(struct device *dev, struct blob_buf *b);
static enum dev_change_type
bridge_reload(struct device *dev, struct blob_attr *attr);
static struct device_type bridge_device_type = {
.name = "bridge",
.config_params = &bridge_attr_list,
.bridge_capability = true,
.name_prefix = "br",
.create = bridge_create,
.config_init = bridge_config_init,
.vlan_update = bridge_dev_vlan_update,
.reload = bridge_reload,
.free = bridge_free,
.dump_info = bridge_dump_info,
.stp_init = bridge_stp_init,
};
struct bridge_state {
struct device dev;
device_state_cb set_state;
struct blob_attr *config_data;
struct bridge_config config;
struct blob_attr *ports;
bool active;
bool force_active;
bool has_vlans;
struct uloop_timeout retry;
struct bridge_member *primary_port;
struct vlist_tree members;
int n_present;
int n_failed;
};
struct bridge_member {
struct vlist_node node;
struct bridge_state *bst;
struct device_user dev;
struct uloop_timeout check_timer;
struct device_vlan_range *extra_vlan;
int n_extra_vlan;
uint16_t pvid;
bool present;
bool active;
char name[];
};
static void
bridge_reset_primary(struct bridge_state *bst)
{
struct bridge_member *bm;
if (!bst->primary_port &&
(bst->dev.settings.flags & DEV_OPT_MACADDR))
return;
bst->primary_port = NULL;
bst->dev.settings.flags &= ~DEV_OPT_MACADDR;
vlist_for_each_element(&bst->members, bm, node) {
uint8_t *macaddr;
if (!bm->present)
continue;
bst->primary_port = bm;
if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR)
macaddr = bm->dev.dev->settings.macaddr;
else
macaddr = bm->dev.dev->orig_settings.macaddr;
memcpy(bst->dev.settings.macaddr, macaddr, 6);
bst->dev.settings.flags |= DEV_OPT_MACADDR;
return;
}
}
static struct bridge_vlan_port *
bridge_find_vlan_member_port(struct bridge_member *bm, struct bridge_vlan *vlan)
{
struct bridge_vlan_hotplug_port *port;
const char *ifname = bm->dev.dev->ifname;
int i;
for (i = 0; i < vlan->n_ports; i++) {
if (strcmp(vlan->ports[i].ifname, ifname) != 0)
continue;
return &vlan->ports[i];
}
list_for_each_entry(port, &vlan->hotplug_ports, list) {
if (strcmp(port->port.ifname, ifname) != 0)
continue;
return &port->port;
}
return NULL;
}
static bool
bridge_member_vlan_is_pvid(struct bridge_member *bm, struct bridge_vlan_port *port)
{
return (!bm->pvid && (port->flags & BRVLAN_F_UNTAGGED)) ||
(port->flags & BRVLAN_F_PVID);
}
static void
__bridge_set_member_vlan(struct bridge_member *bm, struct bridge_vlan *vlan,
struct bridge_vlan_port *port, bool add)
{
uint16_t flags;
flags = port->flags;
if (bm->pvid == vlan->vid)
flags |= BRVLAN_F_PVID;
system_bridge_vlan(port->ifname, vlan->vid, -1, add, flags);
}
static void
bridge_set_member_vlan(struct bridge_member *bm, struct bridge_vlan *vlan, bool add)
{
struct bridge_vlan_port *port;
if (!bm->present)
return;
port = bridge_find_vlan_member_port(bm, vlan);
if (!port)
return;
if (!add && bm->pvid == vlan->vid)
bm->pvid = 0;
else if (add && bridge_member_vlan_is_pvid(bm, port))
bm->pvid = vlan->vid;
__bridge_set_member_vlan(bm, vlan, port, add);
}
static void
bridge_set_local_vlan(struct bridge_state *bst, struct bridge_vlan *vlan, bool add)
{
if (!vlan->local && add)
return;
system_bridge_vlan(bst->dev.ifname, vlan->vid, -1, add, BRVLAN_F_SELF);
}
static void
bridge_set_local_vlans(struct bridge_state *bst, bool add)
{
struct bridge_vlan *vlan;
vlist_for_each_element(&bst->dev.vlans, vlan, node)
bridge_set_local_vlan(bst, vlan, add);
}
static struct bridge_vlan *
bridge_recalc_member_pvid(struct bridge_member *bm)
{
struct bridge_state *bst = bm->bst;
struct bridge_vlan_port *port;
struct bridge_vlan *vlan, *ret = NULL;
vlist_for_each_element(&bst->dev.vlans, vlan, node) {
port = bridge_find_vlan_member_port(bm, vlan);
if (!port)
continue;
if (!bridge_member_vlan_is_pvid(bm, port))
continue;
ret = vlan;
if (port->flags & BRVLAN_F_PVID)
break;
}
return ret;
}
static void
bridge_set_vlan_state(struct bridge_state *bst, struct bridge_vlan *vlan, bool add)
{
struct bridge_member *bm;
struct bridge_vlan *vlan2;
bool clear_pvid = false;
bridge_set_local_vlan(bst, vlan, add);
vlist_for_each_element(&bst->members, bm, node) {
struct bridge_vlan_port *port;
port = bridge_find_vlan_member_port(bm, vlan);
if (!port)
continue;
if (add) {
if (bridge_member_vlan_is_pvid(bm, port))
bm->pvid = vlan->vid;
} else if (bm->pvid == vlan->vid) {
vlan2 = bridge_recalc_member_pvid(bm);
if (vlan2 && vlan2->vid != vlan->vid) {
bridge_set_member_vlan(bm, vlan2, false);
bm->pvid = vlan2->vid;
bridge_set_member_vlan(bm, vlan2, true);
} else if (!vlan2) {
clear_pvid = true;
}
}
if (bm->present)
__bridge_set_member_vlan(bm, vlan, port, add);
if (clear_pvid)
bm->pvid = 0;
}
}
static int
bridge_disable_member(struct bridge_member *bm, bool keep_dev)
{
struct bridge_state *bst = bm->bst;
struct bridge_vlan *vlan;
if (!bm->present || !bm->active)
return 0;
bm->active = false;
vlist_for_each_element(&bst->dev.vlans, vlan, node)
bridge_set_member_vlan(bm, vlan, false);
system_bridge_delif(&bst->dev, bm->dev.dev);
if (!keep_dev)
device_release(&bm->dev);
device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
return 0;
}
static void bridge_stp_notify(struct bridge_state *bst)
{
struct bridge_config *cfg = &bst->config;
if (!cfg->stp || cfg->stp_kernel)
return;
blob_buf_init(&b, 0);
blobmsg_add_string(&b, "name", bst->dev.ifname);
if (cfg->stp_proto)
blobmsg_add_string(&b, "proto", cfg->stp_proto);
blobmsg_add_u32(&b, "forward_delay", cfg->forward_delay);
blobmsg_add_u32(&b, "hello_time", cfg->hello_time);
blobmsg_add_u32(&b, "max_age", cfg->max_age);
if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
blobmsg_add_u32(&b, "ageing_time", cfg->ageing_time);
netifd_ubus_device_notify("stp_init", b.head, 1000);
}
static int
bridge_enable_interface(struct bridge_state *bst)
{
struct device *dev = &bst->dev;
int i, ret;
if (bst->active)
return 0;
bridge_stp_notify(bst);
ret = system_bridge_addbr(dev, &bst->config);
if (ret < 0)
return ret;
if (bst->has_vlans) {
/* delete default VLAN 1 */
system_bridge_vlan(bst->dev.ifname, 1, -1, false, BRVLAN_F_SELF);
bridge_set_local_vlans(bst, true);
}
for (i = 0; i < dev->n_extra_vlan; i++)
system_bridge_vlan(dev->ifname, dev->extra_vlan[i].start,
dev->extra_vlan[i].end, true, BRVLAN_F_SELF);
bst->active = true;
return 0;
}
static void
bridge_stp_init(struct device *dev)
{
struct bridge_state *bst;
bst = container_of(dev, struct bridge_state, dev);
if (!bst->config.stp || !bst->active)
return;
bridge_stp_notify(bst);
system_bridge_set_stp_state(&bst->dev, false);
system_bridge_set_stp_state(&bst->dev, true);
}
static void
bridge_disable_interface(struct bridge_state *bst)
{
if (!bst->active)
return;
system_bridge_delbr(&bst->dev);
bst->active = false;
}
static struct bridge_vlan *
bridge_hotplug_get_vlan(struct bridge_state *bst, uint16_t vid, bool create)
{
struct bridge_vlan *vlan;
vlan = vlist_find(&bst->dev.vlans, &vid, vlan, node);
if (vlan || !create)
return vlan;
vlan = calloc(1, sizeof(*vlan));
vlan->vid = vid;
vlan->local = true;
INIT_LIST_HEAD(&vlan->hotplug_ports);
vlist_add(&bst->dev.vlans, &vlan->node, &vlan->vid);
vlan->node.version = -1;
return vlan;
}
static struct bridge_vlan_hotplug_port *
bridge_hotplug_get_vlan_port(struct bridge_vlan *vlan, const char *ifname)
{
struct bridge_vlan_hotplug_port *port;
list_for_each_entry(port, &vlan->hotplug_ports, list)
if (!strcmp(port->port.ifname, ifname))
return port;
return NULL;
}
static void
bridge_hotplug_set_member_vlans(struct bridge_state *bst, struct blob_attr *vlans,
struct bridge_member *bm, bool add, bool untracked)
{
const char *ifname = bm->name;
struct device_vlan_range *r;
struct bridge_vlan *vlan;
struct blob_attr *cur;
int n_vlans;
size_t rem;
if (!vlans)
return;
if (add) {
bm->n_extra_vlan = 0;
n_vlans = blobmsg_check_array(vlans, BLOBMSG_TYPE_STRING);
if (n_vlans < 1)
return;
bm->extra_vlan = realloc(bm->extra_vlan, n_vlans * sizeof(*bm->extra_vlan));
}
blobmsg_for_each_attr(cur, vlans, rem) {
struct bridge_vlan_hotplug_port *port;
unsigned int vid, vid_end;
uint16_t flags = 0;
char *name_buf;
char *end;
if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
continue;
vid = strtoul(blobmsg_get_string(cur), &end, 0);
vid_end = vid;
if (!vid || vid > 4095)
continue;
if (*end == '-') {
vid_end = strtoul(end + 1, &end, 0);
if (vid_end < vid)
continue;
}
if (end && *end) {
if (*end != ':')
continue;
for (end++; *end; end++) {
switch (*end) {
case 'u':
flags |= BRVLAN_F_UNTAGGED;
fallthrough;
case '*':
flags |= BRVLAN_F_PVID;
break;
}
}
}
vlan = bridge_hotplug_get_vlan(bst, vid, !!flags);
if (!vlan || vid_end > vid || untracked) {
if (add) {
if (!untracked) {
r = &bm->extra_vlan[bm->n_extra_vlan++];
r->start = vid;
r->end = vid_end;
}
if (bm->active)
system_bridge_vlan(ifname, vid, vid_end, true, flags);
} else if (bm->active) {
system_bridge_vlan(ifname, vid, vid_end, false, 0);
}
continue;
}
if (vlan->pending) {
vlan->pending = false;
bridge_set_vlan_state(bst, vlan, true);
}
port = bridge_hotplug_get_vlan_port(vlan, ifname);
if (!add) {
if (!port)
continue;
__bridge_set_member_vlan(bm, vlan, &port->port, false);
list_del(&port->list);
free(port);
continue;
}
if (port) {
if (port->port.flags == flags)
continue;
__bridge_set_member_vlan(bm, vlan, &port->port, false);
port->port.flags = flags;
__bridge_set_member_vlan(bm, vlan, &port->port, true);
continue;
}
port = calloc_a(sizeof(*port), &name_buf, strlen(ifname) + 1);
if (!port)
continue;
port->port.flags = flags;
port->port.ifname = strcpy(name_buf, ifname);
list_add_tail(&port->list, &vlan->hotplug_ports);
if (!bm)
continue;
__bridge_set_member_vlan(bm, vlan, &port->port, true);
}
}
static void
bridge_member_add_extra_vlans(struct bridge_member *bm)
{
struct device *dev = bm->dev.dev;
int i;
for (i = 0; i < dev->n_extra_vlan; i++)
system_bridge_vlan(dev->ifname, dev->extra_vlan[i].start,
dev->extra_vlan[i].end, true, 0);
for (i = 0; i < bm->n_extra_vlan; i++)
system_bridge_vlan(dev->ifname, bm->extra_vlan[i].start,
bm->extra_vlan[i].end, true, 0);
}
static void
bridge_member_enable_vlans(struct bridge_member *bm)
{
struct bridge_state *bst = bm->bst;
struct device *dev = bm->dev.dev;
struct bridge_vlan *vlan;
if (dev->settings.auth) {
bridge_hotplug_set_member_vlans(bst, dev->config_auth_vlans, bm,
!dev->auth_status, true);
bridge_hotplug_set_member_vlans(bst, dev->auth_vlans, bm,
dev->auth_status, true);
}
if (dev->settings.auth && !dev->auth_status)
return;
bridge_member_add_extra_vlans(bm);
vlist_for_each_element(&bst->dev.vlans, vlan, node)
bridge_set_member_vlan(bm, vlan, true);
}
static int
bridge_enable_member(struct bridge_member *bm)
{
struct bridge_state *bst = bm->bst;
struct device *dev;
int ret;
if (!bm->present)
return 0;
ret = bridge_enable_interface(bst);
if (ret)
goto error;
/* Disable IPv6 for bridge members */
if (!(bm->dev.dev->settings.flags & DEV_OPT_IPV6)) {
bm->dev.dev->settings.ipv6 = 0;
bm->dev.dev->settings.flags |= DEV_OPT_IPV6;
}
ret = device_claim(&bm->dev);
if (ret < 0)
goto error;
dev = bm->dev.dev;
if (dev->settings.auth && !bst->has_vlans && !dev->auth_status)
return -1;
if (!bm->active) {
ret = system_bridge_addif(&bst->dev, bm->dev.dev);
if (ret < 0) {
D(DEVICE, "Bridge device %s could not be added", bm->dev.dev->ifname);
goto error;
}
bm->active = true;
}
if (bst->has_vlans) {
/* delete default VLAN 1 */
system_bridge_vlan(bm->dev.dev->ifname, 1, -1, false, 0);
bridge_member_enable_vlans(bm);
}
device_set_present(&bst->dev, true);
if (!dev->settings.auth || dev->auth_status)
device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
return 0;
error:
bst->n_failed++;
bm->present = false;
bst->n_present--;
device_release(&bm->dev);
return ret;
}
static void
bridge_remove_member(struct bridge_member *bm)
{
struct bridge_state *bst = bm->bst;
if (!bm->present)
return;
if (bst->dev.active)
bridge_disable_member(bm, false);
bm->present = false;
bm->bst->n_present--;
if (bm == bst->primary_port)
bridge_reset_primary(bst);
if (bst->config.bridge_empty)
return;
bst->force_active = false;
if (bst->n_present == 0)
device_set_present(&bst->dev, false);
}
static void
bridge_free_member(struct bridge_member *bm)
{
struct bridge_state *bst = bm->bst;
struct device *dev = bm->dev.dev;
const char *ifname = dev->ifname;
struct bridge_vlan *vlan;
bridge_remove_member(bm);
restart:
vlist_for_each_element(&bst->dev.vlans, vlan, node) {
struct bridge_vlan_hotplug_port *port, *tmp;
bool free_port = false;
list_for_each_entry_safe(port, tmp, &vlan->hotplug_ports, list) {
if (strcmp(port->port.ifname, ifname) != 0)
continue;
list_del(&port->list);
free(port);
free_port = true;
}
if (!free_port || !list_empty(&vlan->hotplug_ports) ||
vlan->n_ports || vlan->node.version != -1)
continue;
vlist_delete(&bst->dev.vlans, &vlan->node);
goto restart;
}
device_remove_user(&bm->dev);
uloop_timeout_cancel(&bm->check_timer);
/*
* When reloading the config and moving a device from one bridge to
* another, the other bridge may have tried to claim this device
* before it was removed here.
* Ensure that claiming the device is retried by toggling its present
* state
*/
if (dev->present) {
device_set_present(dev, false);
device_set_present(dev, true);
}
free(bm);
}
static void
bridge_check_retry(struct bridge_state *bst)
{
if (!bst->n_failed)
return;
uloop_timeout_set(&bst->retry, 100);
}
static void
bridge_member_check_cb(struct uloop_timeout *t)
{
struct bridge_member *bm;
struct bridge_state *bst;
bm = container_of(t, struct bridge_member, check_timer);
bst = bm->bst;
if (system_bridge_vlan_check(&bst->dev, bm->dev.dev->ifname) <= 0)
return;
bridge_disable_member(bm, true);
bridge_enable_member(bm);
}
static void
bridge_member_cb(struct device_user *dep, enum device_event ev)
{
struct bridge_member *bm = container_of(dep, struct bridge_member, dev);
struct bridge_state *bst = bm->bst;
struct device *dev = dep->dev;
switch (ev) {
case DEV_EVENT_ADD:
assert(!bm->present);
bm->present = true;
bst->n_present++;
if (bst->n_present == 1)
device_set_present(&bst->dev, true);
fallthrough;
case DEV_EVENT_AUTH_UP:
if (!bst->dev.active)
break;
if (bridge_enable_member(bm))
break;
/*
* Adding a bridge member can overwrite the bridge mtu
* in the kernel, apply the bridge settings in case the
* bridge mtu is set
*/
system_if_apply_settings(&bst->dev, &bst->dev.settings,
DEV_OPT_MTU | DEV_OPT_MTU6);
break;
case DEV_EVENT_LINK_UP:
if (!bst->has_vlans)
break;
if (dev->settings.auth)
bridge_enable_member(bm);
uloop_timeout_set(&bm->check_timer, 1000);
break;
case DEV_EVENT_LINK_DOWN:
if (!dev->settings.auth)
break;
bridge_disable_member(bm, true);
break;
case DEV_EVENT_REMOVE:
if (dep->hotplug && !dev->sys_present) {
vlist_delete(&bst->members, &bm->node);
return;
}
if (bm->present)
bridge_remove_member(bm);
break;
default:
return;
}
}
static int
bridge_set_down(struct bridge_state *bst)
{
struct bridge_member *bm;
bst->set_state(&bst->dev, false);
vlist_for_each_element(&bst->members, bm, node)
bridge_disable_member(bm, false);
bridge_disable_interface(bst);
return 0;
}
static int
bridge_set_up(struct bridge_state *bst)
{
struct bridge_member *bm;
int ret;
bst->has_vlans = !avl_is_empty(&bst->dev.vlans.avl);
if (!bst->n_present) {
if (!bst->force_active)
return -ENOENT;
ret = bridge_enable_interface(bst);
if (ret)
return ret;
}
bst->n_failed = 0;
vlist_for_each_element(&bst->members, bm, node)
bridge_enable_member(bm);
bridge_check_retry(bst);
if (!bst->force_active && !bst->n_present) {
/* initialization of all member interfaces failed */
bridge_disable_interface(bst);
device_set_present(&bst->dev, false);
return -ENOENT;
}
bridge_reset_primary(bst);
ret = bst->set_state(&bst->dev, true);
if (ret < 0)
bridge_set_down(bst);
return ret;
}
static int
bridge_set_state(struct device *dev, bool up)
{
struct bridge_state *bst;
bst = container_of(dev, struct bridge_state, dev);
if (up)
return bridge_set_up(bst);
else
return bridge_set_down(bst);
}
static struct bridge_member *
bridge_alloc_member(struct bridge_state *bst, const char *name,
struct device *dev, bool hotplug)
{
struct bridge_member *bm;
bm = calloc(1, sizeof(*bm) + strlen(name) + 1);
if (!bm)
return NULL;
bm->bst = bst;
bm->dev.cb = bridge_member_cb;
bm->dev.hotplug = hotplug;
bm->check_timer.cb = bridge_member_check_cb;
strcpy(bm->name, name);
bm->dev.dev = dev;
return bm;
}
static void bridge_insert_member(struct bridge_member *bm, const char *name)
{
struct bridge_state *bst = bm->bst;
bool hotplug = bm->dev.hotplug;
vlist_add(&bst->members, &bm->node, bm->name);
/*
* Need to look up the bridge member again as the above
* created pointer will be freed in case the bridge member
* already existed
*/
bm = vlist_find(&bst->members, name, bm, node);
if (hotplug && bm)
bm->node.version = -1;
}
static void
bridge_create_member(struct bridge_state *bst, const char *name,
struct device *dev, bool hotplug)
{
struct bridge_member *bm;
bm = bridge_alloc_member(bst, name, dev, hotplug);
if (bm)
bridge_insert_member(bm, name);
}
static void
bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
struct vlist_node *node_old)
{
struct bridge_member *bm;
struct device *dev;
if (node_new) {
bm = container_of(node_new, struct bridge_member, node);
if (node_old) {
free(bm);
return;
}
dev = bm->dev.dev;
bm->dev.dev = NULL;
device_add_user(&bm->dev, dev);
}
if (node_old) {
bm = container_of(node_old, struct bridge_member, node);
bridge_free_member(bm);
}
}
static void
bridge_add_member(struct bridge_state *bst, const char *name)
{
struct device *dev;
dev = device_get(name, true);
if (!dev)
return;
bridge_create_member(bst, name, dev, false);
}
static int
bridge_hotplug_add(struct device *dev, struct device *member, struct blob_attr *vlan)
{
struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
struct bridge_member *bm;
bool new_entry = false;
bm = vlist_find(&bst->members, member->ifname, bm, node);
if (!bm) {
new_entry = true;
bm = bridge_alloc_member(bst, member->ifname, member, true);
}
bridge_hotplug_set_member_vlans(bst, vlan, bm, true, false);
if (new_entry)
bridge_insert_member(bm, member->ifname);
return 0;
}
static int
bridge_hotplug_del(struct device *dev, struct device *member, struct blob_attr *vlan)
{
struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
struct bridge_member *bm;
bm = vlist_find(&bst->members, member->ifname, bm, node);
if (!bm)
return UBUS_STATUS_NOT_FOUND;
bridge_hotplug_set_member_vlans(bst, vlan, bm, false, false);
if (!bm->dev.hotplug)
return 0;
vlist_delete(&bst->members, &bm->node);
return 0;
}