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bridge: vlan: Allow setting VLAN neighbor suppression state

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Add a new VLAN attribute that allows user space to set the neighbor
suppression state of the port VLAN. Example:

 # bridge -d -j -p vlan show dev swp1 vid 10 | jq '.[]["vlans"][]["neigh_suppress"]'
 false
 # bridge vlan set vid 10 dev swp1 neigh_suppress on
 # bridge -d -j -p vlan show dev swp1 vid 10 | jq '.[]["vlans"][]["neigh_suppress"]'
 true
 # bridge vlan set vid 10 dev swp1 neigh_suppress off
 # bridge -d -j -p vlan show dev swp1 vid 10 | jq '.[]["vlans"][]["neigh_suppress"]'
 false

 # bridge vlan set vid 10 dev br0 neigh_suppress on
 Error: bridge: Can't set neigh_suppress for non-port vlans.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2023-04-19 18:34:58 +03:00 committed by David S. Miller
parent 412614b145
commit 83f6d60079
3 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/uapi/linux/if_bridge.h
View File

@ -525,6 +525,7 @@ enum {
BRIDGE_VLANDB_ENTRY_MCAST_ROUTER,
BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS,
BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS,
BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS,
__BRIDGE_VLANDB_ENTRY_MAX,
};
#define BRIDGE_VLANDB_ENTRY_MAX (__BRIDGE_VLANDB_ENTRY_MAX - 1)

1
net/bridge/br_vlan.c
View File

@ -2134,6 +2134,7 @@ static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] =
[BRIDGE_VLANDB_ENTRY_MCAST_ROUTER] = { .type = NLA_U8 },
[BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS] = { .type = NLA_REJECT },
[BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS] = { .type = NLA_U32 },
[BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS] = NLA_POLICY_MAX(NLA_U8, 1),
};
static int br_vlan_rtm_process_one(struct net_device *dev,

20
net/bridge/br_vlan_options.c
View File

@ -52,7 +52,9 @@ bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
const struct net_bridge_port *p)
{
if (nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_STATE, br_vlan_get_state(v)) ||
!__vlan_tun_put(skb, v))
!__vlan_tun_put(skb, v) ||
nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS,
!!(v->priv_flags & BR_VLFLAG_NEIGH_SUPPRESS_ENABLED)))
return false;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
@ -80,6 +82,7 @@ size_t br_vlan_opts_nl_size(void)
+ nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS */
+ nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS */
#endif
+ nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS */
+ 0;
}
@ -239,6 +242,21 @@ static int br_vlan_process_one_opts(const struct net_bridge *br,
}
#endif
if (tb[BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS]) {
bool enabled = v->priv_flags & BR_VLFLAG_NEIGH_SUPPRESS_ENABLED;
bool val = nla_get_u8(tb[BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS]);
if (!p) {
NL_SET_ERR_MSG_MOD(extack, "Can't set neigh_suppress for non-port vlans");
return -EINVAL;
}
if (val != enabled) {
v->priv_flags ^= BR_VLFLAG_NEIGH_SUPPRESS_ENABLED;
*changed = true;
}
}
return 0;
}