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[NET]: Detect hardware rx checksum faults correctly

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Here is the patch that introduces the generic skb_checksum_complete
which also checks for hardware RX checksum faults.  If that happens,
it'll call netdev_rx_csum_fault which currently prints out a stack
trace with the device name.  In future it can turn off RX checksum.

I've converted every spot under net/ that does RX checksum checks to
use skb_checksum_complete or __skb_checksum_complete with the
exceptions of:

* Those places where checksums are done bit by bit.  These will call
netdev_rx_csum_fault directly.

* The following have not been completely checked/converted:

ipmr
ip_vs
netfilter
dccp

This patch is based on patches and suggestions from Stephen Hemminger
and David S. Miller.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2005-11-10 13:01:24 -08:00
committed by David S. Miller
parent 1064e944d0
commit fb286bb299
19 changed files with 173 additions and 134 deletions
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15
net/ipv4/ip_gre.c
View File

@@ -577,15 +577,16 @@ static int ipgre_rcv(struct sk_buff *skb)
goto drop_nolock;
if (flags&GRE_CSUM) {
if (skb->ip_summed == CHECKSUM_HW) {
switch (skb->ip_summed) {
case CHECKSUM_HW:
csum = (u16)csum_fold(skb->csum);
if (csum)
skb->ip_summed = CHECKSUM_NONE;
}
if (skb->ip_summed == CHECKSUM_NONE) {
skb->csum = skb_checksum(skb, 0, skb->len, 0);
if (!csum)
break;
/* fall through */
case CHECKSUM_NONE:
skb->csum = 0;
csum = __skb_checksum_complete(skb);
skb->ip_summed = CHECKSUM_HW;
csum = (u16)csum_fold(skb->csum);
}
offset += 4;
}