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net: checksum: Introduce fine control over checksum type

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At present net_checksum_calculate() blindly calculates all types of
checksums (IP, TCP, UDP). Some NICs may have a per type setting in
their BDs to control what checksum should be offloaded. To support
such hardware behavior, introduce a 'csum_flag' parameter to the
net_checksum_calculate() API to allow fine control over what type
checksum is calculated.

Existing users of this API are updated accordingly.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Bin Meng
2020-12-11 17:35:12 +08:00
committed by Jason Wang
parent d97f11590a
commit f574633529
10 changed files with 55 additions and 33 deletions
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4
net/filter-rewriter.c
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@ -114,7 +114,7 @@ static int handle_primary_tcp_pkt(RewriterState *rf,
tcp_pkt->th_ack = htonl(ntohl(tcp_pkt->th_ack) + conn->offset);
net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
pkt->size - pkt->vnet_hdr_len);
pkt->size - pkt->vnet_hdr_len, CSUM_TCP);
}
/*
@ -216,7 +216,7 @@ static int handle_secondary_tcp_pkt(RewriterState *rf,
tcp_pkt->th_seq = htonl(ntohl(tcp_pkt->th_seq) - conn->offset);
net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
pkt->size - pkt->vnet_hdr_len);
pkt->size - pkt->vnet_hdr_len, CSUM_TCP);
}
}