Release 4.8 net/bridge/br_stp_if.c
/*
* Spanning tree protocol; interface code
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <net/switchdev.h>
#include "br_private.h"
#include "br_private_stp.h"
/* Port id is composed of priority and port number.
* NB: some bits of priority are dropped to
* make room for more ports.
*/
static inline port_id br_make_port_id(__u8 priority, __u16 port_no)
{
return ((u16)priority << BR_PORT_BITS)
| (port_no & ((1<<BR_PORT_BITS)-1));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 24 | 64.86% | 2 | 66.67% |
pre-git | pre-git | 13 | 35.14% | 1 | 33.33% |
| Total | 37 | 100.00% | 3 | 100.00% |
#define BR_MAX_PORT_PRIORITY ((u16)~0 >> BR_PORT_BITS)
/* called under bridge lock */
void br_init_port(struct net_bridge_port *p)
{
struct switchdev_attr attr = {
.orig_dev = p->dev,
.id = SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
.flags = SWITCHDEV_F_SKIP_EOPNOTSUPP | SWITCHDEV_F_DEFER,
.u.ageing_time = jiffies_to_clock_t(p->br->ageing_time),
};
int err;
p->port_id = br_make_port_id(p->priority, p->port_no);
br_become_designated_port(p);
br_set_state(p, BR_STATE_BLOCKING);
p->topology_change_ack = 0;
p->config_pending = 0;
err = switchdev_port_attr_set(p->dev, &attr);
if (err && err != -EOPNOTSUPP)
netdev_err(p->dev, "failed to set HW ageing time\n");
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
elad raz | elad raz | 57 | 47.11% | 1 | 14.29% |
pre-git | pre-git | 39 | 32.23% | 1 | 14.29% |
ido schimmel | ido schimmel | 15 | 12.40% | 3 | 42.86% |
stephen hemminger | stephen hemminger | 6 | 4.96% | 1 | 14.29% |
florian fainelli | florian fainelli | 4 | 3.31% | 1 | 14.29% |
| Total | 121 | 100.00% | 7 | 100.00% |
/* NO locks held */
void br_stp_enable_bridge(struct net_bridge *br)
{
struct net_bridge_port *p;
spin_lock_bh(&br->lock);
if (br->stp_enabled == BR_KERNEL_STP)
mod_timer(&br->hello_timer, jiffies + br->hello_time);
mod_timer(&br->gc_timer, jiffies + HZ/10);
br_config_bpdu_generation(br);
list_for_each_entry(p, &br->port_list, list) {
if (netif_running(p->dev) && netif_oper_up(p->dev))
br_stp_enable_port(p);
}
spin_unlock_bh(&br->lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 56 | 54.37% | 7 | 77.78% |
pre-git | pre-git | 39 | 37.86% | 1 | 11.11% |
nikolay aleksandrov | nikolay aleksandrov | 8 | 7.77% | 1 | 11.11% |
| Total | 103 | 100.00% | 9 | 100.00% |
/* NO locks held */
void br_stp_disable_bridge(struct net_bridge *br)
{
struct net_bridge_port *p;
spin_lock_bh(&br->lock);
list_for_each_entry(p, &br->port_list, list) {
if (p->state != BR_STATE_DISABLED)
br_stp_disable_port(p);
}
br->topology_change = 0;
br->topology_change_detected = 0;
spin_unlock_bh(&br->lock);
del_timer_sync(&br->hello_timer);
del_timer_sync(&br->topology_change_timer);
del_timer_sync(&br->tcn_timer);
del_timer_sync(&br->gc_timer);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 51 | 52.04% | 3 | 60.00% |
pre-git | pre-git | 45 | 45.92% | 1 | 20.00% |
adrian drzewiecki | adrian drzewiecki | 2 | 2.04% | 1 | 20.00% |
| Total | 98 | 100.00% | 5 | 100.00% |
/* called under bridge lock */
void br_stp_enable_port(struct net_bridge_port *p)
{
br_init_port(p);
br_port_state_selection(p->br);
br_ifinfo_notify(RTM_NEWLINK, p);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 22 | 75.86% | 1 | 50.00% |
stephen hemminger | stephen hemminger | 7 | 24.14% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
/* called under bridge lock */
void br_stp_disable_port(struct net_bridge_port *p)
{
struct net_bridge *br = p->br;
int wasroot;
wasroot = br_is_root_bridge(br);
br_become_designated_port(p);
br_set_state(p, BR_STATE_DISABLED);
p->topology_change_ack = 0;
p->config_pending = 0;
br_ifinfo_notify(RTM_NEWLINK, p);
del_timer(&p->message_age_timer);
del_timer(&p->forward_delay_timer);
del_timer(&p->hold_timer);
br_fdb_delete_by_port(br, p, 0, 0);
br_multicast_disable_port(p);
br_configuration_update(br);
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
br_become_root_bridge(br);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 91 | 72.80% | 1 | 12.50% |
stephen hemminger | stephen hemminger | 23 | 18.40% | 4 | 50.00% |
herbert xu | herbert xu | 5 | 4.00% | 1 | 12.50% |
florian fainelli | florian fainelli | 4 | 3.20% | 1 | 12.50% |
nikolay aleksandrov | nikolay aleksandrov | 2 | 1.60% | 1 | 12.50% |
| Total | 125 | 100.00% | 8 | 100.00% |
static void br_stp_start(struct net_bridge *br)
{
int r;
char *argv[] = { BR_STP_PROG, br->dev->name, "start", NULL };
char *envp[] = { NULL };
struct net_bridge_port *p;
if (net_eq(dev_net(br->dev), &init_net))
r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
else
r = -ENOENT;
spin_lock_bh(&br->lock);
if (br->bridge_forward_delay < BR_MIN_FORWARD_DELAY)
__br_set_forward_delay(br, BR_MIN_FORWARD_DELAY);
else if (br->bridge_forward_delay > BR_MAX_FORWARD_DELAY)
__br_set_forward_delay(br, BR_MAX_FORWARD_DELAY);
if (r == 0) {
br->stp_enabled = BR_USER_STP;
br_debug(br, "userspace STP started\n");
/* Stop hello and hold timers */
del_timer(&br->hello_timer);
list_for_each_entry(p, &br->port_list, list)
del_timer(&p->hold_timer);
} else {
br->stp_enabled = BR_KERNEL_STP;
br_debug(br, "using kernel STP\n");
/* To start timers on any ports left in blocking */
br_port_state_selection(br);
}
spin_unlock_bh(&br->lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 104 | 53.06% | 2 | 28.57% |
herbert xu | herbert xu | 39 | 19.90% | 1 | 14.29% |
nikolay aleksandrov | nikolay aleksandrov | 30 | 15.31% | 1 | 14.29% |
hannes frederic sowa | hannes frederic sowa | 21 | 10.71% | 1 | 14.29% |
jeremy fitzhardinge | jeremy fitzhardinge | 1 | 0.51% | 1 | 14.29% |
vlad yasevich | vlad yasevich | 1 | 0.51% | 1 | 14.29% |
| Total | 196 | 100.00% | 7 | 100.00% |
static void br_stp_stop(struct net_bridge *br)
{
int r;
char *argv[] = { BR_STP_PROG, br->dev->name, "stop", NULL };
char *envp[] = { NULL };
struct net_bridge_port *p;
if (br->stp_enabled == BR_USER_STP) {
r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
br_info(br, "userspace STP stopped, return code %d\n", r);
/* To start timers on any ports left in blocking */
mod_timer(&br->hello_timer, jiffies + br->hello_time);
list_for_each_entry(p, &br->port_list, list)
mod_timer(&p->hold_timer,
round_jiffies(jiffies + BR_HOLD_TIME));
spin_lock_bh(&br->lock);
br_port_state_selection(br);
spin_unlock_bh(&br->lock);
}
br->stp_enabled = BR_NO_STP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 101 | 70.14% | 2 | 50.00% |
nikolay aleksandrov | nikolay aleksandrov | 42 | 29.17% | 1 | 25.00% |
tomas winkler | tomas winkler | 1 | 0.69% | 1 | 25.00% |
| Total | 144 | 100.00% | 4 | 100.00% |
void br_stp_set_enabled(struct net_bridge *br, unsigned long val)
{
ASSERT_RTNL();
if (val) {
if (br->stp_enabled == BR_NO_STP)
br_stp_start(br);
} else {
if (br->stp_enabled != BR_NO_STP)
br_stp_stop(br);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
/* called under bridge lock */
void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *addr)
{
/* should be aligned on 2 bytes for ether_addr_equal() */
unsigned short oldaddr_aligned[ETH_ALEN >> 1];
unsigned char *oldaddr = (unsigned char *)oldaddr_aligned;
struct net_bridge_port *p;
int wasroot;
wasroot = br_is_root_bridge(br);
br_fdb_change_mac_address(br, addr);
memcpy(oldaddr, br->bridge_id.addr, ETH_ALEN);
memcpy(br->bridge_id.addr, addr, ETH_ALEN);
memcpy(br->dev->dev_addr, addr, ETH_ALEN);
list_for_each_entry(p, &br->port_list, list) {
if (ether_addr_equal(p->designated_bridge.addr, oldaddr))
memcpy(p->designated_bridge.addr, addr, ETH_ALEN);
if (ether_addr_equal(p->designated_root.addr, oldaddr))
memcpy(p->designated_root.addr, addr, ETH_ALEN);
}
br_configuration_update(br);
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
br_become_root_bridge(br);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 149 | 80.11% | 1 | 14.29% |
evgeny kravtsunov | evgeny kravtsunov | 17 | 9.14% | 1 | 14.29% |
stephen hemminger | stephen hemminger | 10 | 5.38% | 3 | 42.86% |
toshiaki makita | toshiaki makita | 7 | 3.76% | 1 | 14.29% |
joe perches | joe perches | 3 | 1.61% | 1 | 14.29% |
| Total | 186 | 100.00% | 7 | 100.00% |
/* should be aligned on 2 bytes for ether_addr_equal() */
static const unsigned short br_mac_zero_aligned[ETH_ALEN >> 1];
/* called under bridge lock */
bool br_stp_recalculate_bridge_id(struct net_bridge *br)
{
const unsigned char *br_mac_zero =
(const unsigned char *)br_mac_zero_aligned;
const unsigned char *addr = br_mac_zero;
struct net_bridge_port *p;
/* user has chosen a value so keep it */
if (br->dev->addr_assign_type == NET_ADDR_SET)
return false;
list_for_each_entry(p, &br->port_list, list) {
if (addr == br_mac_zero ||
memcmp(p->dev->dev_addr, addr, ETH_ALEN) < 0)
addr = p->dev->dev_addr;
}
if (ether_addr_equal(br->bridge_id.addr, addr))
return false; /* no change */
br_stp_change_bridge_id(br, addr);
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 66 | 56.41% | 1 | 10.00% |
stephen hemminger | stephen hemminger | 28 | 23.93% | 5 | 50.00% |
evgeny kravtsunov | evgeny kravtsunov | 14 | 11.97% | 1 | 10.00% |
jiri pirko | jiri pirko | 5 | 4.27% | 1 | 10.00% |
balaji g | balaji g | 3 | 2.56% | 1 | 10.00% |
joe perches | joe perches | 1 | 0.85% | 1 | 10.00% |
| Total | 117 | 100.00% | 10 | 100.00% |
/* Acquires and releases bridge lock */
void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio)
{
struct net_bridge_port *p;
int wasroot;
spin_lock_bh(&br->lock);
wasroot = br_is_root_bridge(br);
list_for_each_entry(p, &br->port_list, list) {
if (p->state != BR_STATE_DISABLED &&
br_is_designated_port(p)) {
p->designated_bridge.prio[0] = (newprio >> 8) & 0xFF;
p->designated_bridge.prio[1] = newprio & 0xFF;
}
}
br->bridge_id.prio[0] = (newprio >> 8) & 0xFF;
br->bridge_id.prio[1] = newprio & 0xFF;
br_configuration_update(br);
br_port_state_selection(br);
if (br_is_root_bridge(br) && !wasroot)
br_become_root_bridge(br);
spin_unlock_bh(&br->lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 129 | 83.77% | 1 | 25.00% |
nikolay aleksandrov | nikolay aleksandrov | 16 | 10.39% | 1 | 25.00% |
stephen hemminger | stephen hemminger | 9 | 5.84% | 2 | 50.00% |
| Total | 154 | 100.00% | 4 | 100.00% |
/* called under bridge lock */
int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio)
{
port_id new_port_id;
if (newprio > BR_MAX_PORT_PRIORITY)
return -ERANGE;
new_port_id = br_make_port_id(newprio, p->port_no);
if (br_is_designated_port(p))
p->designated_port = new_port_id;
p->port_id = new_port_id;
p->priority = newprio;
if (!memcmp(&p->br->bridge_id, &p->designated_bridge, 8) &&
p->port_id < p->designated_port) {
br_become_designated_port(p);
br_port_state_selection(p->br);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 73 | 67.59% | 1 | 25.00% |
stephen hemminger | stephen hemminger | 31 | 28.70% | 2 | 50.00% |
linus torvalds | linus torvalds | 4 | 3.70% | 1 | 25.00% |
| Total | 108 | 100.00% | 4 | 100.00% |
/* called under bridge lock */
int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost)
{
if (path_cost < BR_MIN_PATH_COST ||
path_cost > BR_MAX_PATH_COST)
return -ERANGE;
p->flags |= BR_ADMIN_COST;
p->path_cost = path_cost;
br_configuration_update(p->br);
br_port_state_selection(p->br);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 31 | 54.39% | 1 | 33.33% |
stephen hemminger | stephen hemminger | 26 | 45.61% | 2 | 66.67% |
| Total | 57 | 100.00% | 3 | 100.00% |
ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id)
{
return sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
id->prio[0], id->prio[1],
id->addr[0], id->addr[1], id->addr[2],
id->addr[3], id->addr[4], id->addr[5]);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stephen hemminger | stephen hemminger | 79 | 100.00% | 1 | 100.00% |
| Total | 79 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 717 | 43.32% | 1 | 2.04% |
stephen hemminger | stephen hemminger | 620 | 37.46% | 24 | 48.98% |
nikolay aleksandrov | nikolay aleksandrov | 99 | 5.98% | 3 | 6.12% |
elad raz | elad raz | 60 | 3.63% | 1 | 2.04% |
herbert xu | herbert xu | 44 | 2.66% | 2 | 4.08% |
evgeny kravtsunov | evgeny kravtsunov | 37 | 2.24% | 1 | 2.04% |
hannes frederic sowa | hannes frederic sowa | 21 | 1.27% | 1 | 2.04% |
ido schimmel | ido schimmel | 15 | 0.91% | 3 | 6.12% |
florian fainelli | florian fainelli | 8 | 0.48% | 1 | 2.04% |
toshiaki makita | toshiaki makita | 7 | 0.42% | 1 | 2.04% |
jiri pirko | jiri pirko | 5 | 0.30% | 1 | 2.04% |
joe perches | joe perches | 5 | 0.30% | 1 | 2.04% |
linus torvalds | linus torvalds | 4 | 0.24% | 1 | 2.04% |
balaji g | balaji g | 3 | 0.18% | 1 | 2.04% |
paul gortmaker | paul gortmaker | 3 | 0.18% | 1 | 2.04% |
adrian drzewiecki | adrian drzewiecki | 2 | 0.12% | 1 | 2.04% |
tomas winkler | tomas winkler | 1 | 0.06% | 1 | 2.04% |
vlad yasevich | vlad yasevich | 1 | 0.06% | 1 | 2.04% |
adrian bunk | adrian bunk | 1 | 0.06% | 1 | 2.04% |
jeremy fitzhardinge | jeremy fitzhardinge | 1 | 0.06% | 1 | 2.04% |
vivien didelot | vivien didelot | 1 | 0.06% | 1 | 2.04% |
| Total | 1655 | 100.00% | 49 | 100.00% |
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