diff options
| -rw-r--r-- | net/dsa/tag_dsa.c | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index a822355afc90..0f258218c8cf 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -126,7 +126,42 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev, u8 extra) { struct dsa_port *dp = dsa_slave_to_port(dev); + u8 tag_dev, tag_port; + enum dsa_cmd cmd; u8 *dsa_header; + u16 pvid = 0; + int err; + + if (skb->offload_fwd_mark) { + struct dsa_switch_tree *dst = dp->ds->dst; + struct net_device *br = dp->bridge_dev; + + cmd = DSA_CMD_FORWARD; + + /* When offloading forwarding for a bridge, inject FORWARD + * packets on behalf of a virtual switch device with an index + * past the physical switches. + */ + tag_dev = dst->last_switch + 1 + dp->bridge_num; + tag_port = 0; + + /* If we are offloading forwarding for a VLAN-unaware bridge, + * inject packets to hardware using the bridge's pvid, since + * that's where the packets ingressed from. + */ + if (!br_vlan_enabled(br)) { + /* Safe because __dev_queue_xmit() runs under + * rcu_read_lock_bh() + */ + err = br_vlan_get_pvid_rcu(br, &pvid); + if (err) + return NULL; + } + } else { + cmd = DSA_CMD_FROM_CPU; + tag_dev = dp->ds->index; + tag_port = dp->index; + } if (skb->protocol == htons(ETH_P_8021Q)) { if (extra) { @@ -134,10 +169,10 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev, memmove(skb->data, skb->data + extra, 2 * ETH_ALEN); } - /* Construct tagged FROM_CPU DSA tag from 802.1Q tag. */ + /* Construct tagged DSA tag from 802.1Q tag. */ dsa_header = skb->data + 2 * ETH_ALEN + extra; - dsa_header[0] = (DSA_CMD_FROM_CPU << 6) | 0x20 | dp->ds->index; - dsa_header[1] = dp->index << 3; + dsa_header[0] = (cmd << 6) | 0x20 | tag_dev; + dsa_header[1] = tag_port << 3; /* Move CFI field from byte 2 to byte 1. */ if (dsa_header[2] & 0x10) { @@ -148,12 +183,13 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev, skb_push(skb, DSA_HLEN + extra); memmove(skb->data, skb->data + DSA_HLEN + extra, 2 * ETH_ALEN); - /* Construct untagged FROM_CPU DSA tag. */ + /* Construct untagged DSA tag. */ dsa_header = skb->data + 2 * ETH_ALEN + extra; - dsa_header[0] = (DSA_CMD_FROM_CPU << 6) | dp->ds->index; - dsa_header[1] = dp->index << 3; - dsa_header[2] = 0x00; - dsa_header[3] = 0x00; + + dsa_header[0] = (cmd << 6) | tag_dev; + dsa_header[1] = tag_port << 3; + dsa_header[2] = pvid >> 8; + dsa_header[3] = pvid & 0xff; } return skb; |