diff options
Diffstat (limited to 'net/bridge/br_vlan.c')
| -rw-r--r-- | net/bridge/br_vlan.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 3ba57fcdcd13..dfa7c9a7e193 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -499,9 +499,38 @@ err_filt: goto unlock; } +int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) +{ + u16 pvid = val; + int err = 0; + + if (!val || val >= VLAN_VID_MASK) + return -EINVAL; + + if (!rtnl_trylock()) + return restart_syscall(); + + if (pvid == br->default_pvid) + goto unlock; + + /* Only allow default pvid change when filtering is disabled */ + if (br->vlan_enabled) { + pr_info_once("Please disable vlan filtering to change default_pvid\n"); + err = -EPERM; + goto unlock; + } + + br->default_pvid = pvid; + +unlock: + rtnl_unlock(); + return err; +} + void br_vlan_init(struct net_bridge *br) { br->vlan_proto = htons(ETH_P_8021Q); + br->default_pvid = 1; } /* Must be protected by RTNL. |