diff options
| author | Julian Wiedmann <jwi@linux.vnet.ibm.com> | 2017-12-20 20:11:06 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-20 15:23:45 -0500 |
| commit | a843383a3e046af550cff5d33149541fcb0ea4e0 (patch) | |
| tree | 21e4f07aa9f906d3a04dc92382fce9492c8dbfe8 /drivers | |
| parent | a65d14104349db217edfcd535521f2d61859cc1f (diff) | |
| download | linux-a843383a3e046af550cff5d33149541fcb0ea4e0.tar.bz2 | |
s390/qeth: unionize next-hop field in qeth L3 header
The L3 packet descriptor's 'dest_addr' field is used for a different
purpose in RX descriptors. Clean up the hard-coded byte accesses and
try to be more self-documenting.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 19 | ||||
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 12 |
2 files changed, 23 insertions, 8 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 100f7cce0260..db42107bf2f5 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -297,8 +297,23 @@ struct qeth_hdr_layer3 { __u8 ext_flags; __u16 vlan_id; __u16 frame_offset; - __u8 dest_addr[16]; -} __attribute__ ((packed)); + union { + /* TX: */ + u8 ipv6_addr[16]; + struct ipv4 { + u8 res[12]; + u32 addr; + } ipv4; + /* RX: */ + struct rx { + u8 res1[2]; + u8 src_mac[6]; + u8 res2[4]; + u16 vlan_id; + u8 res3[2]; + } rx; + } next_hop; +}; struct qeth_hdr_layer2 { __u8 id; diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index e168719c4b93..4723ed9831eb 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1637,7 +1637,7 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, } if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR) card->dev->header_ops->create(skb, card->dev, prot, - tg_addr, &hdr->hdr.l3.dest_addr[2], + tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac, card->dev->addr_len); else card->dev->header_ops->create(skb, card->dev, prot, @@ -1652,7 +1652,7 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, QETH_HDR_EXT_INCLUDE_VLAN_TAG))) { u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ? hdr->hdr.l3.vlan_id : - *((u16 *)&hdr->hdr.l3.dest_addr[12]); + hdr->hdr.l3.next_hop.rx.vlan_id; __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); } @@ -2408,7 +2408,7 @@ static void qeth_l3_fill_af_iucv_hdr(struct qeth_card *card, daddr[0] = 0xfe; daddr[1] = 0x80; memcpy(&daddr[8], iucv_hdr->destUserID, 8); - memcpy(hdr->hdr.l3.dest_addr, daddr, 16); + memcpy(hdr->hdr.l3.next_hop.ipv6_addr, daddr, 16); } static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, @@ -2445,8 +2445,8 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, /* IPv4 */ hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags4(cast_type); - memset(hdr->hdr.l3.dest_addr, 0, 12); - *((__be32 *) (&hdr->hdr.l3.dest_addr[12])) = *pkey; + memset(hdr->hdr.l3.next_hop.ipv4.res, 0, 12); + *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = *pkey; } else if (ipv == 6) { struct rt6_info *rt = (struct rt6_info *) dst; struct in6_addr *pkey = &ipv6_hdr(skb)->daddr; @@ -2458,7 +2458,7 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags6(cast_type); if (card->info.type == QETH_CARD_TYPE_IQD) hdr->hdr.l3.flags &= ~QETH_HDR_PASSTHRU; - memcpy(hdr->hdr.l3.dest_addr, pkey, 16); + memcpy(hdr->hdr.l3.next_hop.ipv6_addr, pkey, 16); } else { if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, skb->dev->broadcast)) { |