| commit | 0718bcc09b3597c51e87f265c72135a4928d3c0b | |
| author | Herbert Xu <herbert@gondor.apana.org.au> | |
| Mon, 26 Jun 2006 06:55:46 +0000 (25 23:55 -0700) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Mon, 26 Jun 2006 06:55:46 +0000 (25 23:55 -0700) | ||
| tree | fd4a686629488bad28f3c780e6b2b52803698877 | treesnapshot (tar.gz zip) |
| parent | 3ba07e65b288f00cc4d2420f1da46309b1cb5a0c | commitdiff |
[NET]: Fix CHECKSUM_HW GSO problems.
Fix checksum problems in the GSO code path for CHECKSUM_HW packets.
The ipv4 TCP pseudo header checksum has to be adjusted for GSO
segmented packets.
The adjustment is needed because the length field in the pseudo-header
changes. However, because we have the inequality oldlen > newlen, we
know that delta = (u16)~oldlen + newlen is still a 16-bit quantity.
This also means that htonl(delta) + th->check still fits in 32 bits.
Therefore we don't have to use csum_add on this operations.
This is based on a patch by Michael Chan <mchan@broadcom.com>.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix checksum problems in the GSO code path for CHECKSUM_HW packets.
The ipv4 TCP pseudo header checksum has to be adjusted for GSO
segmented packets.
The adjustment is needed because the length field in the pseudo-header
changes. However, because we have the inequality oldlen > newlen, we
know that delta = (u16)~oldlen + newlen is still a 16-bit quantity.
This also means that htonl(delta) + th->check still fits in 32 bits.
Therefore we don't have to use csum_add on this operations.
This is based on a patch by Michael Chan <mchan@broadcom.com>.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/ipv4/tcp.c | diffblobblamehistory |