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authorStephen Hemminger <shemming@brocade.com>2016-03-08 23:59:35 +0300
committerDavid S. Miller <davem@davemloft.net>2016-03-11 22:58:58 +0300
commit4c656c13b254d598e83e586b7b4d36a2043dad85 (patch)
tree02e8b364036b21cb569d138aaa52e0d70f0e27e9 /net/bridge/br_stp.c
parent88de1cd457e5cb664d6d437e2ea4750d089165f5 (diff)
downloadlinux-4c656c13b254d598e83e586b7b4d36a2043dad85.tar.xz
bridge: allow zero ageing time
This fixes a regression in the bridge ageing time caused by: commit c62987bbd8a1 ("bridge: push bridge setting ageing_time down to switchdev") There are users of Linux bridge which use the feature that if ageing time is set to 0 it causes entries to never expire. See: https://www.linuxfoundation.org/collaborate/workgroups/networking/bridge For a pure software bridge, it is unnecessary for the code to have arbitrary restrictions on what values are allowable. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_stp.c')
-rw-r--r--net/bridge/br_stp.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index c22816a0b1b1..e23449094188 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -562,6 +562,14 @@ int br_set_max_age(struct net_bridge *br, unsigned long val)
}
+/* Set time interval that dynamic forwarding entries live
+ * For pure software bridge, allow values outside the 802.1
+ * standard specification for special cases:
+ * 0 - entry never ages (all permanant)
+ * 1 - entry disappears (no persistance)
+ *
+ * Offloaded switch entries maybe more restrictive
+ */
int br_set_ageing_time(struct net_bridge *br, u32 ageing_time)
{
struct switchdev_attr attr = {
@@ -573,9 +581,6 @@ int br_set_ageing_time(struct net_bridge *br, u32 ageing_time)
unsigned long t = clock_t_to_jiffies(ageing_time);
int err;
- if (t < BR_MIN_AGEING_TIME || t > BR_MAX_AGEING_TIME)
- return -ERANGE;
-
err = switchdev_port_attr_set(br->dev, &attr);
if (err)
return err;