[SCSI] libiscsi_tcp: support padding offload
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>
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 8e008c9..d0ed522 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -336,6 +336,8 @@
#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
diff --git a/include/scsi/libiscsi_tcp.h b/include/scsi/libiscsi_tcp.h
index e6bf8ef..83e32f6 100644
--- a/include/scsi/libiscsi_tcp.h
+++ b/include/scsi/libiscsi_tcp.h
@@ -99,7 +99,8 @@
/* segment helpers */
extern int iscsi_tcp_recv_segment_is_hdr(struct iscsi_tcp_conn *tcp_conn);
-extern int iscsi_tcp_segment_done(struct iscsi_segment *segment, int recv,
+extern int iscsi_tcp_segment_done(struct iscsi_tcp_conn *tcp_conn,
+ struct iscsi_segment *segment, int recv,
unsigned copied);
extern void iscsi_tcp_segment_unmap(struct iscsi_segment *segment);