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Commit 8304bbce authored by Nicholas Bellinger's avatar Nicholas Bellinger
Browse files

iscsi: Add Serial Number Arithmetic LT and GT into iscsi_proto.h 



This patch moves the iscsi_sna_lt() and iscsi_sna_lte(), along with
iscsi_sna_gt() and iscsi_sna_gte() from iscsi_target_mod into
static inlines inside of include/scsi/iscsi_proto.h

This patch also includes the ISCSI_HDR_LEN and ISCSI_CRC_LEN
definitions.

(Added JesperJ simpliciation for iscsi_sna_* usage)

Signed-off-by: default avatarMark Rustad <mark.d.rustad@intel.com>
Signed-off-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarNicholas A. Bellinger <nab@linux-iscsi.org>
parent 55bdabdf

drivers/scsi/libiscsi.c

+0 −16
Original line number Diff line number Diff line
@@ -84,22 +84,6 @@ MODULE_PARM_DESC(debug_libiscsi_eh, 
					     __func__, ##arg);		\

	} while (0);



/* Serial Number Arithmetic, 32 bits, less than, RFC1982 */

#define SNA32_CHECK 2147483648UL



static int iscsi_sna_lt(u32 n1, u32 n2)

{

	return n1 != n2 && ((n1 < n2 && (n2 - n1 < SNA32_CHECK)) ||

			    (n1 > n2 && (n2 - n1 < SNA32_CHECK)));

}



/* Serial Number Arithmetic, 32 bits, less than, RFC1982 */

static int iscsi_sna_lte(u32 n1, u32 n2)

{

	return n1 == n2 || ((n1 < n2 && (n2 - n1 < SNA32_CHECK)) ||

			    (n1 > n2 && (n2 - n1 < SNA32_CHECK)));

}



inline void iscsi_conn_queue_work(struct iscsi_conn *conn)

{

	struct Scsi_Host *shost = conn->session->host;

include/scsi/iscsi_proto.h

+30 −0
Original line number Diff line number Diff line
@@ -29,9 +29,39 @@ 
/* default iSCSI listen port for incoming connections */

#define ISCSI_LISTEN_PORT	3260



/* iSCSI header length */

#define ISCSI_HDR_LEN		48



/* iSCSI CRC32C length */

#define ISCSI_CRC_LEN		4



/* Padding word length */

#define ISCSI_PAD_LEN		4



/*

 * Serial Number Arithmetic, 32 bits, RFC1982

 */



static inline int iscsi_sna_lt(u32 n1, u32 n2)

{

	return (s32)(n1 - n2) < 0;

}



static inline int iscsi_sna_lte(u32 n1, u32 n2)

{

	return (s32)(n1 - n2) <= 0;

}



static inline int iscsi_sna_gt(u32 n1, u32 n2)

{

	return (s32)(n1 - n2) > 0;

}



static inline int iscsi_sna_gte(u32 n1, u32 n2)

{

	return (s32)(n1 - n2) >= 0;

}



/*

 * useful common(control and data pathes) macro

 */