[SCSI] iscsi_tcp: hook iscsi_tcp into new libiscsi_tcp module

This hooks iscsi_tcp into the libiscsi_tcp module and removes
code that is now in libiscsi_tcp.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/Makefile

@@ -36,7 +36,7 @@ obj-$(CONFIG_SCSI_SAS_LIBSAS)	+= libsas/
 obj-$(CONFIG_SCSI_SRP_ATTRS)	+= scsi_transport_srp.o
 obj-$(CONFIG_SCSI_DH)		+= device_handler/
 
-obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	iscsi_tcp.o
+obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	libiscsi_tcp.o iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER) 	+= libiscsi.o
 obj-$(CONFIG_SCSI_A4000T)	+= 53c700.o	a4000t.o
 obj-$(CONFIG_SCSI_ZORRO7XX)	+= 53c700.o	zorro7xx.o

drivers/scsi/iscsi_tcp.h

@@ -19,67 +19,27 @@
  * See the file COPYING included with this distribution for more details.
  */
 
-#ifndef ISCSI_TCP_H
-#define ISCSI_TCP_H
+#ifndef ISCSI_SW_TCP_H
+#define ISCSI_SW_TCP_H
 
 #include <scsi/libiscsi.h>
+#include <scsi/libiscsi_tcp.h>
 
-struct crypto_hash;
 struct socket;
 struct iscsi_tcp_conn;
-struct iscsi_segment;
-
-typedef int iscsi_segment_done_fn_t(struct iscsi_tcp_conn *,
-				    struct iscsi_segment *);
-
-struct iscsi_segment {
-	unsigned char		*data;
-	unsigned int		size;
-	unsigned int		copied;
-	unsigned int		total_size;
-	unsigned int		total_copied;
-
-	struct hash_desc	*hash;
-	unsigned char		recv_digest[ISCSI_DIGEST_SIZE];
-	unsigned char		digest[ISCSI_DIGEST_SIZE];
-	unsigned int		digest_len;
-
-	struct scatterlist	*sg;
-	void			*sg_mapped;
-	unsigned int		sg_offset;
-
-	iscsi_segment_done_fn_t	*done;
-};
-
-/* Socket connection recieve helper */
-struct iscsi_tcp_recv {
-	struct iscsi_hdr	*hdr;
-	struct iscsi_segment	segment;
-
-	/* Allocate buffer for BHS + AHS */
-	uint32_t		hdr_buf[64];
-
-	/* copied and flipped values */
-	int			datalen;
-};
 
 /* Socket connection send helper */
-struct iscsi_tcp_send {
+struct iscsi_sw_tcp_send {
 	struct iscsi_hdr	*hdr;
 	struct iscsi_segment	segment;
 	struct iscsi_segment	data_segment;
 };
 
-struct iscsi_tcp_conn {
+struct iscsi_sw_tcp_conn {
 	struct iscsi_conn	*iscsi_conn;
 	struct socket		*sock;
-	int			stop_stage;	/* conn_stop() flag: *
-						 * stop to recover,  *
-						 * stop to terminate */
-	/* control data */
-	struct iscsi_tcp_recv	in;		/* TCP receive context */
-	struct iscsi_tcp_send	out;		/* TCP send context */
 
+	struct iscsi_sw_tcp_send out;
 	/* old values for socket callbacks */
 	void			(*old_data_ready)(struct sock *, int);
 	void			(*old_state_change)(struct sock *);
@@ -93,24 +53,13 @@ struct iscsi_tcp_conn {
 	uint32_t		sendpage_failures_cnt;
 	uint32_t		discontiguous_hdr_cnt;
 
-	int			error;
-
 	ssize_t (*sendpage)(struct socket *, struct page *, int, size_t, int);
 };
 
-struct iscsi_tcp_task {
-	struct iscsi_hdr_buff {
-		struct iscsi_hdr	hdrbuf;
-		char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
+struct iscsi_sw_tcp_hdrbuf {
+	struct iscsi_hdr	hdrbuf;
+	char			hdrextbuf[ISCSI_MAX_AHS_SIZE +
 		                                  ISCSI_DIGEST_SIZE];
-	} hdr;
-
-	int			sent;
-	uint32_t		exp_datasn;	/* expected target's R2TSN/DataSN */
-	int			data_offset;
-	struct iscsi_r2t_info	*r2t;		/* in progress solict R2T */
-	struct iscsi_pool	r2tpool;
-	struct kfifo		*r2tqueue;
 };
 
-#endif /* ISCSI_H */
+#endif /* ISCSI_SW_TCP_H */