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[SCSI] libiscsi_tcp: support padding offload

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cxgb3i does not offload the processing of the header,
but it will always process the padding. This patch
adds a padding offload flag to detect when the LLD
supports this.

The patch also modifies the header processing so that
we do not try to read/bypass the header dugest in the
skb. cxgb3i will not include it with the header like
with other offload cards.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie
2008-12-02 00:32:16 -06:00
committed by James Bottomley
parent ae15f80172
commit 6df19a791b
4 changed files with 29 additions and 22 deletions
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2
include/scsi/iscsi_if.h
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@@ -336,6 +336,8 @@ enum iscsi_host_param {
#define CAP_SENDTARGETS_OFFLOAD 0x400 /* offload discovery process */
#define CAP_DATA_PATH_OFFLOAD 0x800 /* offload entire IO path */
#define CAP_DIGEST_OFFLOAD 0x1000 /* offload hdr and data digests */
#define CAP_PADDING_OFFLOAD 0x2000 /* offload padding insertion, removal,
and verification */
/*
* These flags describes reason of stop_conn() call