diff options
| -rw-r--r-- | net/bridge/br_private.h | 2 | ||||
| -rw-r--r-- | net/bridge/br_sysfs_br.c | 17 | ||||
| -rw-r--r-- | net/bridge/br_vlan.c | 29 |
3 files changed, 48 insertions, 0 deletions
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index fe7463c2af9a..5a347eb1d139 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -299,6 +299,7 @@ struct net_bridge #ifdef CONFIG_BRIDGE_VLAN_FILTERING u8 vlan_enabled; __be16 vlan_proto; + u16 default_pvid; struct net_port_vlans __rcu *vlan_info; #endif }; @@ -605,6 +606,7 @@ void br_recalculate_fwd_mask(struct net_bridge *br); int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); int br_vlan_set_proto(struct net_bridge *br, unsigned long val); void br_vlan_init(struct net_bridge *br); +int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); void nbp_vlan_flush(struct net_bridge_port *port); diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c index cb431c6016ee..4c97fc50fb70 100644 --- a/net/bridge/br_sysfs_br.c +++ b/net/bridge/br_sysfs_br.c @@ -725,6 +725,22 @@ static ssize_t vlan_protocol_store(struct device *d, return store_bridge_parm(d, buf, len, br_vlan_set_proto); } static DEVICE_ATTR_RW(vlan_protocol); + +static ssize_t default_pvid_show(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct net_bridge *br = to_bridge(d); + return sprintf(buf, "%d\n", br->default_pvid); +} + +static ssize_t default_pvid_store(struct device *d, + struct device_attribute *attr, + const char *buf, size_t len) +{ + return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid); +} +static DEVICE_ATTR_RW(default_pvid); #endif static struct attribute *bridge_attrs[] = { @@ -771,6 +787,7 @@ static struct attribute *bridge_attrs[] = { #ifdef CONFIG_BRIDGE_VLAN_FILTERING &dev_attr_vlan_filtering.attr, &dev_attr_vlan_protocol.attr, + &dev_attr_default_pvid.attr, #endif NULL }; 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. |