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authorYi Zou <yi.zou@intel.com>2012-03-19 11:12:41 +0000
committerDavid S. Miller <davem@davemloft.net>2012-03-19 17:37:35 -0400
commit3af79302b400e05b45e377993a8870869500466b (patch)
treed273210736e14576bbc49009ece005c62f1bb3e8
parentcf64bc8f093581d0697b65ea8dd04bdd27a676b0 (diff)
net: update the usage of CHECKSUM_UNNECESSARY
As suggested by Ben, this adds the clarification on the usage of CHECKSUM_UNNECESSARY on the outgoing patch. Also add the usage description of NETIF_F_FCOE_CRC and CHECKSUM_UNNECESSARY for the kernel FCoE protocol driver. This is a follow-up to the following: http://patchwork.ozlabs.org/patch/147315/ Signed-off-by: Yi Zou <yi.zou@intel.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: www.Open-FCoE.org <devel@open-fcoe.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 8dc8257eab8b..a2b9953b582d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -94,6 +94,13 @@
* about CHECKSUM_UNNECESSARY. 8)
* NETIF_F_IPV6_CSUM about as dumb as the last one but does IPv6 instead.
*
+ * UNNECESSARY: device will do per protocol specific csum. Protocol drivers
+ * that do not want net to perform the checksum calculation should use
+ * this flag in their outgoing skbs.
+ * NETIF_F_FCOE_CRC this indicates the device can do FCoE FC CRC
+ * offload. Correspondingly, the FCoE protocol driver
+ * stack should use CHECKSUM_UNNECESSARY.
+ *
* Any questions? No questions, good. --ANK
*/