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| author | Davide Caratti <dcaratti@redhat.com> | 2017-05-18 16:44:38 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-20 02:21:29 +0300 |
| commit | b72b5bf6a8fc9065f270ae135bbd47abb9d96790 (patch) | |
| tree | 3ef3e49136727497d5722cdd4eed3c9419661d4d /include/linux/skbuff.h | |
| parent | 9617813dba5b6c112922c60cd2bc57c6e11ae907 (diff) | |
| download | linux-b72b5bf6a8fc9065f270ae135bbd47abb9d96790.tar.xz | |
net: introduce skb_crc32c_csum_help
skb_crc32c_csum_help is like skb_checksum_help, but it is designed for
checksumming SCTP packets using crc32c (see RFC3309), provided that
libcrc32c.ko has been loaded before. In case libcrc32c is not loaded,
invoking skb_crc32c_csum_help on a skb results in one the following
printouts:
warn_crc32c_csum_update: attempt to compute crc32c without libcrc32c.ko
warn_crc32c_csum_combine: attempt to compute crc32c without libcrc32c.ko
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index b1f46a0d18e2..62d62964c743 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -193,7 +193,8 @@ * accordingly. Note the there is no indication in the skbuff that the * CHECKSUM_PARTIAL refers to an SCTP checksum, a driver that supports * both IP checksum offload and SCTP CRC offload must verify which offload - * is configured for a packet presumably by inspecting packet headers. + * is configured for a packet presumably by inspecting packet headers; in + * case, skb_crc32c_csum_help is provided to compute CRC on SCTP packets. * * NETIF_F_FCOE_CRC - This feature indicates that a device is capable of * offloading the FCOE CRC in a packet. To perform this offload the stack |