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/vxlan/encap.c | |
| 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/vxlan/encap.c')
| -rw-r--r-- | src/vnet/vxlan/encap.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/vnet/vxlan/encap.c b/src/vnet/vxlan/encap.c index 787758a94f8..476e0f2b3b7 100644 --- a/src/vnet/vxlan/encap.c +++ b/src/vnet/vxlan/encap.c @@ -98,14 +98,14 @@ vxlan_encap_inline (vlib_main_t * vm, u8 const underlay_hdr_len = is_ip4 ? sizeof (ip4_vxlan_header_t) : sizeof (ip6_vxlan_header_t); u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t); - u32 const csum_flags = is_ip4 ? VNET_BUFFER_F_OFFLOAD_IP_CKSUM | - VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | - VNET_BUFFER_F_L3_HDR_OFFSET_VALID | VNET_BUFFER_F_L4_HDR_OFFSET_VALID : - VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | - VNET_BUFFER_F_L3_HDR_OFFSET_VALID | VNET_BUFFER_F_L4_HDR_OFFSET_VALID; - u32 const inner_packet_csum_offload_flags = - VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | - VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; + u32 const csum_flags = + is_ip4 ? VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID | + VNET_BUFFER_F_L4_HDR_OFFSET_VALID : + VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID | + VNET_BUFFER_F_L4_HDR_OFFSET_VALID; + u32 const outer_packet_csum_offload_flags = + is_ip4 ? VNET_BUFFER_OFFLOAD_F_IP_CKSUM | VNET_BUFFER_OFFLOAD_F_UDP_CKSUM : + VNET_BUFFER_OFFLOAD_F_UDP_CKSUM; u32 const inner_packet_removed_flags = VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID | VNET_BUFFER_F_L3_HDR_OFFSET_VALID | @@ -144,7 +144,7 @@ vxlan_encap_inline (vlib_main_t * vm, b += 2; u32 or_flags = b0->flags | b1->flags; - if (csum_offload && (or_flags & inner_packet_csum_offload_flags)) + if (csum_offload && (or_flags & VNET_BUFFER_F_OFFLOAD)) { /* Only calculate the non-GSO packet csum offload */ if ((b0->flags & VNET_BUFFER_F_GSO) == 0) @@ -284,9 +284,13 @@ vxlan_encap_inline (vlib_main_t * vm, b0->flags |= csum_flags; vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data; vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data; + vnet_buffer_offload_flags_set (b0, + outer_packet_csum_offload_flags); b1->flags |= csum_flags; vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data; vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data; + vnet_buffer_offload_flags_set (b1, + outer_packet_csum_offload_flags); } /* IPv4 UDP checksum only if checksum offload is used */ else if (is_ip4) @@ -377,7 +381,7 @@ vxlan_encap_inline (vlib_main_t * vm, vlib_buffer_t *b0 = b[0]; b += 1; - if (csum_offload && (b0->flags & inner_packet_csum_offload_flags)) + if (csum_offload && (b0->flags & VNET_BUFFER_F_OFFLOAD)) { /* Only calculate the non-GSO packet csum offload */ if ((b0->flags & VNET_BUFFER_F_GSO) == 0) @@ -459,6 +463,8 @@ vxlan_encap_inline (vlib_main_t * vm, b0->flags |= csum_flags; vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data; vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data; + vnet_buffer_offload_flags_set (b0, + outer_packet_csum_offload_flags); } /* IPv4 UDP checksum only if checksum offload is used */ else if (is_ip4) |