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[PATCH v2 27/41] net/eth: Always add VLAN tag
From: |
Akihiko Odaki |
Subject: |
[PATCH v2 27/41] net/eth: Always add VLAN tag |
Date: |
Thu, 20 Apr 2023 14:46:43 +0900 |
It is possible to have another VLAN tag even if the packet is already
tagged.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
include/net/eth.h | 4 ++--
hw/net/net_tx_pkt.c | 16 +++++++---------
net/eth.c | 22 ++++++----------------
3 files changed, 15 insertions(+), 27 deletions(-)
diff --git a/include/net/eth.h b/include/net/eth.h
index 95ff24d6b8..048e434685 100644
--- a/include/net/eth.h
+++ b/include/net/eth.h
@@ -353,8 +353,8 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt,
size_t iovoff,
uint16_t
eth_get_l3_proto(const struct iovec *l2hdr_iov, int iovcnt, size_t l2hdr_len);
-void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
- uint16_t vlan_ethtype, bool *is_new);
+void eth_setup_vlan_headers(struct eth_header *ehdr, size_t *ehdr_size,
+ uint16_t vlan_tag, uint16_t vlan_ethtype);
uint8_t eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto);
diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c
index ce6b102391..af8f77a3f0 100644
--- a/hw/net/net_tx_pkt.c
+++ b/hw/net/net_tx_pkt.c
@@ -40,7 +40,10 @@ struct NetTxPkt {
struct iovec *vec;
- uint8_t l2_hdr[ETH_MAX_L2_HDR_LEN];
+ struct {
+ struct eth_header eth;
+ struct vlan_header vlan[3];
+ } l2_hdr;
union {
struct ip_header ip;
struct ip6_header ip6;
@@ -365,18 +368,13 @@ bool net_tx_pkt_build_vheader(struct NetTxPkt *pkt, bool
tso_enable,
void net_tx_pkt_setup_vlan_header_ex(struct NetTxPkt *pkt,
uint16_t vlan, uint16_t vlan_ethtype)
{
- bool is_new;
assert(pkt);
eth_setup_vlan_headers(pkt->vec[NET_TX_PKT_L2HDR_FRAG].iov_base,
- vlan, vlan_ethtype, &is_new);
+ &pkt->vec[NET_TX_PKT_L2HDR_FRAG].iov_len,
+ vlan, vlan_ethtype);
- /* update l2hdrlen */
- if (is_new) {
- pkt->hdr_len += sizeof(struct vlan_header);
- pkt->vec[NET_TX_PKT_L2HDR_FRAG].iov_len +=
- sizeof(struct vlan_header);
- }
+ pkt->hdr_len += sizeof(struct vlan_header);
}
bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt, void *base, size_t len)
diff --git a/net/eth.c b/net/eth.c
index f7ffbda600..5307978486 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -21,26 +21,16 @@
#include "net/checksum.h"
#include "net/tap.h"
-void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag,
- uint16_t vlan_ethtype, bool *is_new)
+void eth_setup_vlan_headers(struct eth_header *ehdr, size_t *ehdr_size,
+ uint16_t vlan_tag, uint16_t vlan_ethtype)
{
struct vlan_header *vhdr = PKT_GET_VLAN_HDR(ehdr);
- switch (be16_to_cpu(ehdr->h_proto)) {
- case ETH_P_VLAN:
- case ETH_P_DVLAN:
- /* vlan hdr exists */
- *is_new = false;
- break;
-
- default:
- /* No VLAN header, put a new one */
- vhdr->h_proto = ehdr->h_proto;
- ehdr->h_proto = cpu_to_be16(vlan_ethtype);
- *is_new = true;
- break;
- }
+ memmove(vhdr + 1, vhdr, *ehdr_size - ETH_HLEN);
vhdr->h_tci = cpu_to_be16(vlan_tag);
+ vhdr->h_proto = ehdr->h_proto;
+ ehdr->h_proto = cpu_to_be16(vlan_ethtype);
+ *ehdr_size += sizeof(*vhdr);
}
uint8_t
--
2.40.0
- RE: [PATCH v2 23/41] igb: Add more definitions for Tx descriptor, (continued)
- [PATCH v2 24/41] igb: Share common VF constants, Akihiko Odaki, 2023/04/20
- [PATCH v2 28/41] hw/net/net_rx_pkt: Enforce alignment for eth_header, Akihiko Odaki, 2023/04/20
- [PATCH v2 29/41] tests/qtest/libqos/igb: Set GPIE.Multiple_MSIX, Akihiko Odaki, 2023/04/20
- [PATCH v2 30/41] igb: Implement MSI-X single vector mode, Akihiko Odaki, 2023/04/20
- [PATCH v2 31/41] igb: Use UDP for RSS hash, Akihiko Odaki, 2023/04/20
- [PATCH v2 33/41] igb: Implement Tx SCTP CSO, Akihiko Odaki, 2023/04/20
- [PATCH v2 27/41] net/eth: Always add VLAN tag,
Akihiko Odaki <=
- [PATCH v2 35/41] igb: Filter with the second VLAN tag for extended VLAN, Akihiko Odaki, 2023/04/20
- [PATCH v2 32/41] igb: Implement Rx SCTP CSO, Akihiko Odaki, 2023/04/20
- [PATCH v2 34/41] igb: Strip the second VLAN tag for extended VLAN, Akihiko Odaki, 2023/04/20
- [PATCH v2 36/41] igb: Implement igb-specific oversize check, Akihiko Odaki, 2023/04/20
- [PATCH v2 37/41] igb: Implement Rx PTP2 timestamp, Akihiko Odaki, 2023/04/20
- [PATCH v2 38/41] igb: Implement Tx timestamp, Akihiko Odaki, 2023/04/20