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authorstephen hemminger <stephen@networkplumber.org>2013-04-13 14:06:07 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-15 14:03:44 -0400
commit8f3359bdc83f1abb1989e0817ab0e0b18667c828 (patch)
tree445804a55d594511f181fda573faecc78604509a /net
parentf88c91ddba958e9a5dd4a5ee8c52a0faa790f586 (diff)
downloadvexpress-lsk-8f3359bdc83f1abb1989e0817ab0e0b18667c828.tar.gz
bridge: make user modified path cost sticky
Keep a STP port path cost value if it was set by a user. Don't replace it with the link-speed based path cost whenever the link goes down and comes back up. Reported-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_if.c3
-rw-r--r--net/bridge/br_private.h1
-rw-r--r--net/bridge/br_stp_if.c1
3 files changed, 4 insertions, 1 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index ef1b91431c6..459dab22b3f 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -67,7 +67,8 @@ void br_port_carrier_check(struct net_bridge_port *p)
struct net_device *dev = p->dev;
struct net_bridge *br = p->br;
- if (netif_running(dev) && netif_oper_up(dev))
+ if (!(p->flags & BR_ADMIN_COST) &&
+ netif_running(dev) && netif_oper_up(dev))
p->path_cost = port_cost(dev);
if (!netif_running(br->dev))
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3cbf5beb3d4..d2c043a857b 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -156,6 +156,7 @@ struct net_bridge_port
#define BR_BPDU_GUARD 0x00000002
#define BR_ROOT_BLOCK 0x00000004
#define BR_MULTICAST_FAST_LEAVE 0x00000008
+#define BR_ADMIN_COST 0x00000010
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
u32 multicast_startup_queries_sent;
diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
index 0bdb4ebd362..d45e760141b 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -288,6 +288,7 @@ int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long 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);