/* called under bridge lock */
static void br_check_timers(struct net_bridge *br)
{
struct net_bridge_port *p;
if (br_timer_has_expired(&br->gc_timer, br->gc_interval)) {
br_timer_set(&br->gc_timer, jiffies);
br_fdb_cleanup(br);
}
if (br_timer_has_expired(&br->hello_timer, br->hello_time)) {
br_timer_clear(&br->hello_timer);
br_hello_timer_expired(br);
}
if (br_timer_has_expired(&br->tcn_timer, br->bridge_hello_time)) {
br_timer_clear(&br->tcn_timer);
br_tcn_timer_expired(br);
}
if (br_timer_has_expired(&br->topology_change_timer, br->bridge_forward_delay + br->bridge_max_age)) {
br_timer_clear(&br->topology_change_timer);
br_topology_change_timer_expired(br);
}
p = br->port_list;
while (p != NULL) {
if (p->state != BR_STATE_DISABLED)
br_check_port_timers(p);
p = p->next;
}
}
/* called under bridge lock */
void br_init_port(struct net_bridge_port *p)
{
p->port_id = br_make_port_id(p);
br_become_designated_port(p);
p->state = BR_STATE_BLOCKING;
#if defined( CONFIG_RTL865X)&&defined(CONFIG_RE865X)
{
int retval=0, vlanPort;
char name[IFNAMSIZ];
strcpy(name, p->dev->name);
vlanPort=name[strlen(name)-1]-'0';
retval=rtl8651_setSpanningTreeInstancePortState(0, vlanPort,1);
if(0==retval)
printk("RTL865x Port %d state=BLOCKING\n", vlanPort);
else
printk("RTL865x port %d set state error=%d", vlanPort, retval);
}
#endif
p->topology_change_ack = 0;
p->config_pending = 0;
br_timer_clear(&p->message_age_timer);
br_timer_clear(&p->forward_delay_timer);
br_timer_clear(&p->hold_timer);
}
/* called under bridge lock */
void br_init_port(struct net_bridge_port *p)
{
p->port_id = br_make_port_id(p);
br_become_designated_port(p);
p->state = BR_STATE_BLOCKING;
p->topology_change_ack = 0;
p->config_pending = 0;
br_timer_clear(&p->message_age_timer);
br_timer_clear(&p->forward_delay_timer);
br_timer_clear(&p->hold_timer);
}
/* called under bridge lock */
static void br_make_blocking(struct net_bridge_port *p)
{
if (p->state != BR_STATE_DISABLED &&
p->state != BR_STATE_BLOCKING) {
if (p->state == BR_STATE_FORWARDING ||
p->state == BR_STATE_LEARNING)
br_topology_change_detection(p->br);
printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
p->br->dev.name, p->port_no, p->dev->name, "blocking");
p->state = BR_STATE_BLOCKING;
#if defined( CONFIG_RTL865X)&&defined(CONFIG_RE865X)
{
int retval=0, vlanPort;
char name[IFNAMSIZ];
strcpy(name, p->dev->name);
vlanPort=name[strlen(name)-1]-'0';
retval=rtl8651_setSpanningTreeInstancePortState(0, vlanPort,1);
if(0==retval)
printk("RTL865x Port %d state=BLOCKING\n", vlanPort);
else
printk("RTL865x port %d set state error=%d", vlanPort, retval);
}
#endif
br_timer_clear(&p->forward_delay_timer);
}
}
/* called under bridge lock */
static void br_check_port_timers(struct net_bridge_port *p)
{
if (br_timer_has_expired(&p->message_age_timer, p->br->max_age)) {
br_timer_clear(&p->message_age_timer);
br_message_age_timer_expired(p);
}
if (br_timer_has_expired(&p->forward_delay_timer, p->br->forward_delay)) {
br_timer_clear(&p->forward_delay_timer);
br_forward_delay_timer_expired(p);
}
if (br_timer_has_expired(&p->hold_timer, BR_HOLD_TIME)) {
br_timer_clear(&p->hold_timer);
br_hold_timer_expired(p);
}
}
/* called under bridge lock */
void br_become_root_bridge(struct net_bridge *br)
{
br->max_age = br->bridge_max_age;
br->hello_time = br->bridge_hello_time;
br->forward_delay = br->bridge_forward_delay;
br_topology_change_detection(br);
br_timer_clear(&br->tcn_timer);
br_timer_set(&br->hello_timer, jiffies - br->hello_time);
}
static struct net_bridge *new_nb(char *name)
{
struct net_bridge *br;
struct net_device *dev;
if ((br = kmalloc(sizeof(*br), GFP_KERNEL)) == NULL)
return NULL;
memset(br, 0, sizeof(*br));
dev = &br->dev;
strncpy(dev->name, name, IFNAMSIZ);
dev->priv = br;
ether_setup(dev);
br_dev_setup(dev);
br->lock = RW_LOCK_UNLOCKED;
br->hash_lock = RW_LOCK_UNLOCKED;
br->bridge_id.prio[0] = 0x80;
br->bridge_id.prio[1] = 0x00;
memset(br->bridge_id.addr, 0, ETH_ALEN);
br->stp_enabled = 1;
br->designated_root = br->bridge_id;
br->root_path_cost = 0;
br->root_port = 0;
br->bridge_max_age = br->max_age = 20 * HZ;
br->bridge_hello_time = br->hello_time = 2 * HZ;
br->bridge_forward_delay = br->forward_delay = 15 * HZ;
br->topology_change = 0;
br->topology_change_detected = 0;
br_timer_clear(&br->hello_timer);
br_timer_clear(&br->tcn_timer);
br_timer_clear(&br->topology_change_timer);
br->ageing_time = 300 * HZ;
br->gc_interval = 4 * HZ;
return br;
}
/* called under bridge lock */
void br_stp_disable_bridge(struct net_bridge *br)
{
struct net_bridge_port *p;
br->topology_change = 0;
br->topology_change_detected = 0;
br_timer_clear(&br->hello_timer);
br_timer_clear(&br->topology_change_timer);
br_timer_clear(&br->tcn_timer);
br_timer_clear(&br->gc_timer);
br_fdb_cleanup(br);
p = br->port_list;
while (p != NULL) {
if (p->state != BR_STATE_DISABLED)
br_stp_disable_port(p);
p = p->next;
}
del_timer(&br->tick);
}
/* lock-safe */
void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu)
{
struct net_bridge *br;
int was_root;
if (p->state == BR_STATE_DISABLED)
return;
br = p->br;
read_lock(&br->lock);
was_root = br_is_root_bridge(br);
if (br_supersedes_port_info(p, bpdu)) {
br_record_config_information(p, bpdu);
br_configuration_update(br);
br_port_state_selection(br);
if (!br_is_root_bridge(br) && was_root) {
br_timer_clear(&br->hello_timer);
if (br->topology_change_detected) {
br_timer_clear(&br->topology_change_timer);
br_transmit_tcn(br);
br_timer_set(&br->tcn_timer, jiffies);
}
}
if (p->port_no == br->root_port) {
br_record_config_timeout_values(br, bpdu);
br_config_bpdu_generation(br);
if (bpdu->topology_change_ack)
br_topology_change_acknowledged(br);
}
} else if (br_is_designated_port(p)) {
br_reply(p);
}
read_unlock(&br->lock);
}
/* called under bridge lock */
void br_stp_disable_port(struct net_bridge_port *p)
{
struct net_bridge *br;
int wasroot;
br = p->br;
printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
br->dev.name, p->port_no, p->dev->name, "disabled");
wasroot = br_is_root_bridge(br);
br_become_designated_port(p);
p->state = BR_STATE_DISABLED;
p->topology_change_ack = 0;
p->config_pending = 0;
br_timer_clear(&p->message_age_timer);
br_timer_clear(&p->forward_delay_timer);
br_timer_clear(&p->hold_timer);
br_configuration_update(br);
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
br_become_root_bridge(br);
}
/* called under bridge lock */
static void br_make_blocking(struct net_bridge_port *p)
{
if (p->state != BR_STATE_DISABLED &&
p->state != BR_STATE_BLOCKING) {
if (p->state == BR_STATE_FORWARDING ||
p->state == BR_STATE_LEARNING)
br_topology_change_detection(p->br);
// printk(KERN_INFO "%s: port %i(%s) entering %s state\n",
// p->br->dev.name, p->port_no, p->dev->name, "blocking");
p->state = BR_STATE_BLOCKING;
br_timer_clear(&p->forward_delay_timer);
}
}
/* called under bridge lock */
void br_port_state_selection(struct net_bridge *br)
{
struct net_bridge_port *p;
p = br->port_list;
while (p != NULL) {
if (p->state != BR_STATE_DISABLED) {
if (p->port_no == br->root_port) {
p->config_pending = 0;
p->topology_change_ack = 0;
br_make_forwarding(p);
} else if (br_is_designated_port(p)) {
br_timer_clear(&p->message_age_timer);
br_make_forwarding(p);
} else {
p->config_pending = 0;
p->topology_change_ack = 0;
br_make_blocking(p);
}
}
p = p->next;
}
}
/* called under bridge lock */
static void br_topology_change_acknowledged(struct net_bridge *br)
{
br->topology_change_detected = 0;
br_timer_clear(&br->tcn_timer);
}
