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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2009-04-27 22:35:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-28 01:53:14 -0700 |
| commit | 8dc92f7e2ecfd93f5c57da78594a7a5482e2c15e (patch) | |
| tree | 10ebbfa0dc4f0b175c95cf47f2ba013aa532676e /net/sctp | |
| parent | 182ff8dfdb63e66ca81e4d3a4c746f8d578e5687 (diff) | |
| download | linux-8dc92f7e2ecfd93f5c57da78594a7a5482e2c15e.tar.gz linux-8dc92f7e2ecfd93f5c57da78594a7a5482e2c15e.tar.bz2 linux-8dc92f7e2ecfd93f5c57da78594a7a5482e2c15e.zip | |
sctp: add feature bit for SCTP offload in hardware
this is the sctp code to enable hardware crc32c offload for
adapters that support it.
Originally by: Vlad Yasevich <vladislav.yasevich@hp.com>
modified by Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/output.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c index 7d08f522ec84..f0c91df59d4e 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -412,6 +412,7 @@ int sctp_packet_transmit(struct sctp_packet *packet) /* Build the SCTP header. */ sh = (struct sctphdr *)skb_push(nskb, sizeof(struct sctphdr)); + skb_reset_transport_header(nskb); sh->source = htons(packet->source_port); sh->dest = htons(packet->destination_port); @@ -527,15 +528,25 @@ int sctp_packet_transmit(struct sctp_packet *packet) * Note: Adler-32 is no longer applicable, as has been replaced * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>. */ - if (!sctp_checksum_disable && !(dst->dev->features & NETIF_F_NO_CSUM)) { + if (!sctp_checksum_disable && + !(dst->dev->features & (NETIF_F_NO_CSUM | NETIF_F_SCTP_CSUM))) { __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len); /* 3) Put the resultant value into the checksum field in the * common header, and leave the rest of the bits unchanged. */ sh->checksum = sctp_end_cksum(crc32); - } else - nskb->ip_summed = CHECKSUM_UNNECESSARY; + } else { + if (dst->dev->features & NETIF_F_SCTP_CSUM) { + /* no need to seed psuedo checksum for SCTP */ + nskb->ip_summed = CHECKSUM_PARTIAL; + nskb->csum_start = (skb_transport_header(nskb) - + nskb->head); + nskb->csum_offset = offsetof(struct sctphdr, checksum); + } else { + nskb->ip_summed = CHECKSUM_UNNECESSARY; + } + } /* IP layer ECN support * From RFC 2481 |