diff options
| author |   Mohsin Kazmi <sykazmi@cisco.com> | 2021-02-10 11:26:24 +0100 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2021-02-15 20:32:56 +0000 |
| commit | 6809538e646bf86c000dc1faba60b0a4157ad898 (patch) | |
| tree | 18a228b96226932381f15e44b4972636de1c7fe1 /src/vnet/devices/af_packet | |
| parent | 99c6dc6a7a36c0be95da9afb3ad8830b24754d4e (diff) | |
vlib: refactor checksum offload support
Type: refactor
This patch refactors the offload flags in vlib_buffer_t.
There are two main reasons behind this refactoring.
First, offload flags are insufficient to represent outer
and inner headers offloads. Second, room for these flags
in first cacheline of vlib_buffer_t is also limited.
This patch introduces a generic offload flag in first
cacheline. And detailed offload flags in 2nd cacheline
of the structure for performance optimization.
Change-Id: Icc363a142fb9208ec7113ab5bbfc8230181f6004
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet/devices/af_packet')
| -rw-r--r-- | src/vnet/devices/af_packet/node.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c index f4db6399a57..9f1782e2d13 100644 --- a/src/vnet/devices/af_packet/node.c +++ b/src/vnet/devices/af_packet/node.c @@ -120,6 +120,7 @@ static_always_inline void mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) { ethernet_header_t *eth = vlib_buffer_get_current (b); + u32 oflags = 0; if (clib_net_to_host_u16 (eth->type) == ETHERNET_TYPE_IP4) { ip4_header_t *ip4 = @@ -127,7 +128,7 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) b->flags |= VNET_BUFFER_F_IS_IP4; if (ip4->protocol == IP_PROTOCOL_TCP) { - b->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM; tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b) + sizeof (ethernet_header_t) + ip4_header_bytes (ip4)); @@ -136,7 +137,7 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) } else if (ip4->protocol == IP_PROTOCOL_UDP) { - b->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; + oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM; udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b) + sizeof (ethernet_header_t) + ip4_header_bytes (ip4)); @@ -146,6 +147,8 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) vnet_buffer (b)->l3_hdr_offset = sizeof (ethernet_header_t); vnet_buffer (b)->l4_hdr_offset = sizeof (ethernet_header_t) + ip4_header_bytes (ip4); + if (oflags) + vnet_buffer_offload_flags_set (b, oflags); } else if (clib_net_to_host_u16 (eth->type) == ETHERNET_TYPE_IP6) { @@ -165,7 +168,7 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) } if (ip6->protocol == IP_PROTOCOL_TCP) { - b->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM; tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b) + sizeof (ethernet_header_t) + ip6_hdr_len); @@ -174,7 +177,7 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) } else if (ip6->protocol == IP_PROTOCOL_UDP) { - b->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; + oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM; udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b) + sizeof (ethernet_header_t) + ip6_hdr_len); @@ -184,6 +187,8 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t *b, u8 *l4_hdr_sz) vnet_buffer (b)->l3_hdr_offset = sizeof (ethernet_header_t); vnet_buffer (b)->l4_hdr_offset = sizeof (ethernet_header_t) + ip6_hdr_len; + if (oflags) + vnet_buffer_offload_flags_set (b, oflags); } } |