diff options
author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2009-04-27 18:35:52 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-04-28 04:53:14 -0400 |
commit | 8dc92f7e2ecfd93f5c57da78594a7a5482e2c15e (patch) | |
tree | 10ebbfa0dc4f0b175c95cf47f2ba013aa532676e /net/sctp | |
parent | 182ff8dfdb63e66ca81e4d3a4c746f8d578e5687 (diff) |
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) | |||
412 | 412 | ||
413 | /* Build the SCTP header. */ | 413 | /* Build the SCTP header. */ |
414 | sh = (struct sctphdr *)skb_push(nskb, sizeof(struct sctphdr)); | 414 | sh = (struct sctphdr *)skb_push(nskb, sizeof(struct sctphdr)); |
415 | skb_reset_transport_header(nskb); | ||
415 | sh->source = htons(packet->source_port); | 416 | sh->source = htons(packet->source_port); |
416 | sh->dest = htons(packet->destination_port); | 417 | sh->dest = htons(packet->destination_port); |
417 | 418 | ||
@@ -527,15 +528,25 @@ int sctp_packet_transmit(struct sctp_packet *packet) | |||
527 | * Note: Adler-32 is no longer applicable, as has been replaced | 528 | * Note: Adler-32 is no longer applicable, as has been replaced |
528 | * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>. | 529 | * by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>. |
529 | */ | 530 | */ |
530 | if (!sctp_checksum_disable && !(dst->dev->features & NETIF_F_NO_CSUM)) { | 531 | if (!sctp_checksum_disable && |
532 | !(dst->dev->features & (NETIF_F_NO_CSUM | NETIF_F_SCTP_CSUM))) { | ||
531 | __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len); | 533 | __u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len); |
532 | 534 | ||
533 | /* 3) Put the resultant value into the checksum field in the | 535 | /* 3) Put the resultant value into the checksum field in the |
534 | * common header, and leave the rest of the bits unchanged. | 536 | * common header, and leave the rest of the bits unchanged. |
535 | */ | 537 | */ |
536 | sh->checksum = sctp_end_cksum(crc32); | 538 | sh->checksum = sctp_end_cksum(crc32); |
537 | } else | 539 | } else { |
538 | nskb->ip_summed = CHECKSUM_UNNECESSARY; | 540 | if (dst->dev->features & NETIF_F_SCTP_CSUM) { |
541 | /* no need to seed psuedo checksum for SCTP */ | ||
542 | nskb->ip_summed = CHECKSUM_PARTIAL; | ||
543 | nskb->csum_start = (skb_transport_header(nskb) - | ||
544 | nskb->head); | ||
545 | nskb->csum_offset = offsetof(struct sctphdr, checksum); | ||
546 | } else { | ||
547 | nskb->ip_summed = CHECKSUM_UNNECESSARY; | ||
548 | } | ||
549 | } | ||
539 | 550 | ||
540 | /* IP layer ECN support | 551 | /* IP layer ECN support |
541 | * From RFC 2481 | 552 | * From RFC 2481 |