diff options
Diffstat (limited to 'net/dsa/tag_ocelot.c')
| -rw-r--r-- | net/dsa/tag_ocelot.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/net/dsa/tag_ocelot.c b/net/dsa/tag_ocelot.c index 605b51ca6921..cd60b94fc175 100644 --- a/net/dsa/tag_ocelot.c +++ b/net/dsa/tag_ocelot.c @@ -4,15 +4,52 @@ #include <linux/dsa/ocelot.h> #include "dsa_priv.h" +/* If the port is under a VLAN-aware bridge, remove the VLAN header from the + * payload and move it into the DSA tag, which will make the switch classify + * the packet to the bridge VLAN. Otherwise, leave the classified VLAN at zero, + * which is the pvid of standalone and VLAN-unaware bridge ports. + */ +static void ocelot_xmit_get_vlan_info(struct sk_buff *skb, struct dsa_port *dp, + u64 *vlan_tci, u64 *tag_type) +{ + struct net_device *br = READ_ONCE(dp->bridge_dev); + struct vlan_ethhdr *hdr; + u16 proto, tci; + + if (!br || !br_vlan_enabled(br)) { + *vlan_tci = 0; + *tag_type = IFH_TAG_TYPE_C; + return; + } + + hdr = (struct vlan_ethhdr *)skb_mac_header(skb); + br_vlan_get_proto(br, &proto); + + if (ntohs(hdr->h_vlan_proto) == proto) { + __skb_vlan_pop(skb, &tci); + *vlan_tci = tci; + } else { + rcu_read_lock(); + br_vlan_get_pvid_rcu(br, &tci); + rcu_read_unlock(); + *vlan_tci = tci; + } + + *tag_type = (proto != ETH_P_8021Q) ? IFH_TAG_TYPE_S : IFH_TAG_TYPE_C; +} + static void ocelot_xmit_common(struct sk_buff *skb, struct net_device *netdev, __be32 ifh_prefix, void **ifh) { struct dsa_port *dp = dsa_slave_to_port(netdev); struct dsa_switch *ds = dp->ds; + u64 vlan_tci, tag_type; void *injection; __be32 *prefix; u32 rew_op = 0; + ocelot_xmit_get_vlan_info(skb, dp, &vlan_tci, &tag_type); + injection = skb_push(skb, OCELOT_TAG_LEN); prefix = skb_push(skb, OCELOT_SHORT_PREFIX_LEN); @@ -21,6 +58,8 @@ static void ocelot_xmit_common(struct sk_buff *skb, struct net_device *netdev, ocelot_ifh_set_bypass(injection, 1); ocelot_ifh_set_src(injection, ds->num_ports); ocelot_ifh_set_qos_class(injection, skb->priority); + ocelot_ifh_set_vlan_tci(injection, vlan_tci); + ocelot_ifh_set_tag_type(injection, tag_type); rew_op = ocelot_ptp_rew_op(skb); if (rew_op) |