提交 b03b6dd5 编写于 作者: V Vitalii Demianets 提交者: David S. Miller

bridge: master device stuck in no-carrier state forever when in user-stp mode

When in user-stp mode, bridge master do not follow state of its slaves, so
after the following sequence of events it can stuck forever in no-carrier
state:
1) turn stp off
2) put all slaves down - master device will follow their state and also go in
no-carrier state
3) turn stp on with bridge-stp script returning 0 (go to the user-stp mode)
Now bridge master won't follow slaves' state and will never reach running
state.

This patch solves the problem by making user-stp and kernel-stp behavior
similar regarding master following slaves' states.
Signed-off-by: NVitalii Demianets <vitas@nppfactor.kiev.ua>
Acked-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 efbc368d
......@@ -18,6 +18,7 @@
#include <net/sock.h>
#include "br_private.h"
#include "br_private_stp.h"
static inline size_t br_nlmsg_size(void)
{
......@@ -188,6 +189,11 @@ static int br_rtm_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
p->state = new_state;
br_log_state(p);
spin_lock_bh(&p->br->lock);
br_port_state_selection(p->br);
spin_unlock_bh(&p->br->lock);
br_ifinfo_notify(RTM_NEWLINK, p);
return 0;
......
......@@ -399,25 +399,24 @@ void br_port_state_selection(struct net_bridge *br)
struct net_bridge_port *p;
unsigned int liveports = 0;
/* Don't change port states if userspace is handling STP */
if (br->stp_enabled == BR_USER_STP)
return;
list_for_each_entry(p, &br->port_list, list) {
if (p->state == BR_STATE_DISABLED)
continue;
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)) {
del_timer(&p->message_age_timer);
br_make_forwarding(p);
} else {
p->config_pending = 0;
p->topology_change_ack = 0;
br_make_blocking(p);
/* Don't change port states if userspace is handling STP */
if (br->stp_enabled != BR_USER_STP) {
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)) {
del_timer(&p->message_age_timer);
br_make_forwarding(p);
} else {
p->config_pending = 0;
p->topology_change_ack = 0;
br_make_blocking(p);
}
}
if (p->state == BR_STATE_FORWARDING)
......
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