diff options
Diffstat (limited to 'net/dsa/tag_dsa.c')
| -rw-r--r-- | net/dsa/tag_dsa.c | 95 |
1 files changed, 66 insertions, 29 deletions
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index a822355afc90..77d0ce89ab77 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -126,18 +126,53 @@ 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) { skb_push(skb, extra); - memmove(skb->data, skb->data + extra, 2 * ETH_ALEN); + dsa_alloc_etype_header(skb, extra); } - /* Construct tagged FROM_CPU 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; + /* Construct tagged DSA tag from 802.1Q tag. */ + dsa_header = dsa_etype_header_pos_tx(skb) + extra; + 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) { @@ -146,14 +181,15 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev, } } else { skb_push(skb, DSA_HLEN + extra); - memmove(skb->data, skb->data + DSA_HLEN + extra, 2 * ETH_ALEN); - - /* Construct untagged FROM_CPU 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_alloc_etype_header(skb, DSA_HLEN + extra); + + /* Construct untagged DSA tag. */ + dsa_header = dsa_etype_header_pos_tx(skb) + extra; + + 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; @@ -162,20 +198,18 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev, static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev, u8 extra) { + bool trap = false, trunk = false; int source_device, source_port; - bool trunk = false; enum dsa_code code; enum dsa_cmd cmd; u8 *dsa_header; /* The ethertype field is part of the DSA header. */ - dsa_header = skb->data - 2; + dsa_header = dsa_etype_header_pos_rx(skb); cmd = dsa_header[0] >> 6; switch (cmd) { case DSA_CMD_FORWARD: - skb->offload_fwd_mark = 1; - trunk = !!(dsa_header[1] & 7); break; @@ -194,7 +228,6 @@ static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev, * device (like a bridge) that forwarding has * already been done by hardware. */ - skb->offload_fwd_mark = 1; break; case DSA_CODE_MGMT_TRAP: case DSA_CODE_IGMP_MLD_TRAP: @@ -202,6 +235,7 @@ static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev, /* Traps have, by definition, not been * forwarded by hardware, so don't mark them. */ + trap = true; break; default: /* Reserved code, this could be anything. Drop @@ -235,6 +269,15 @@ static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev, if (!skb->dev) return NULL; + /* When using LAG offload, skb->dev is not a DSA slave interface, + * so we cannot call dsa_default_offload_fwd_mark and we need to + * special-case it. + */ + if (trunk) + skb->offload_fwd_mark = true; + else if (!trap) + dsa_default_offload_fwd_mark(skb); + /* If the 'tagged' bit is set; convert the DSA tag to a 802.1Q * tag, and delete the ethertype (extra) if applicable. If the * 'tagged' bit is cleared; delete the DSA tag, and ethertype @@ -269,14 +312,10 @@ static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev, memcpy(dsa_header, new_header, DSA_HLEN); if (extra) - memmove(skb->data - ETH_HLEN, - skb->data - ETH_HLEN - extra, - 2 * ETH_ALEN); + dsa_strip_etype_header(skb, extra); } else { skb_pull_rcsum(skb, DSA_HLEN); - memmove(skb->data - ETH_HLEN, - skb->data - ETH_HLEN - DSA_HLEN - extra, - 2 * ETH_ALEN); + dsa_strip_etype_header(skb, DSA_HLEN + extra); } return skb; @@ -289,8 +328,7 @@ static struct sk_buff *dsa_xmit(struct sk_buff *skb, struct net_device *dev) return dsa_xmit_ll(skb, dev, 0); } -static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *pt) +static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev) { if (unlikely(!pskb_may_pull(skb, DSA_HLEN))) return NULL; @@ -322,7 +360,7 @@ static struct sk_buff *edsa_xmit(struct sk_buff *skb, struct net_device *dev) if (!skb) return NULL; - edsa_header = skb->data + 2 * ETH_ALEN; + edsa_header = dsa_etype_header_pos_tx(skb); edsa_header[0] = (ETH_P_EDSA >> 8) & 0xff; edsa_header[1] = ETH_P_EDSA & 0xff; edsa_header[2] = 0x00; @@ -330,8 +368,7 @@ static struct sk_buff *edsa_xmit(struct sk_buff *skb, struct net_device *dev) return skb; } -static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *pt) +static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev) { if (unlikely(!pskb_may_pull(skb, EDSA_HLEN))) return NULL; |