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Commit b4759dcd authored by Davide Caratti's avatar Davide Caratti Committed by David S. Miller
Browse files

sk_buff.h: improve description of CHECKSUM_{COMPLETE, UNNECESSARY} 



Add FCoE to the list of protocols that can set CHECKSUM_UNNECESSARY; add a
note to CHECKSUM_COMPLETE section to specify that it does not apply to SCTP
and FCoE protocols.

Suggested-by: default avatarTom Herbert <tom@herbertland.com>
Signed-off-by: default avatarDavide Caratti <dcaratti@redhat.com>
Acked-by: default avatarTom Herbert <tom@herbertland.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7529390d

include/linux/skbuff.h

+5 −2
Original line number Diff line number Diff line
@@ -109,6 +109,7 @@ 
 *       may perform further validation in this case.

 *     GRE: only if the checksum is present in the header.

 *     SCTP: indicates the CRC in SCTP header has been validated.

 *     FCOE: indicates the CRC in FC frame has been validated.

 *

 *   skb->csum_level indicates the number of consecutive checksums found in

 *   the packet minus one that have been verified as CHECKSUM_UNNECESSARY.
@@ -126,8 +127,10 @@ 
 *   packet as seen by netif_rx() and fills out in skb->csum. Meaning, the

 *   hardware doesn't need to parse L3/L4 headers to implement this.

 *

 *   Note: Even if device supports only some protocols, but is able to produce

 *   Notes:

 *   - Even if device supports only some protocols, but is able to produce

 *     skb->csum, it MUST use CHECKSUM_COMPLETE, not CHECKSUM_UNNECESSARY.

 *   - CHECKSUM_COMPLETE is not applicable to SCTP and FCoE protocols.

 *

 * CHECKSUM_PARTIAL:

 *