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

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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: Mark Rustad <mark.d.rustad@intel.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger
2011-03-22 14:14:09 -07:00
parent 55bdabdf41
commit 8304bbceee
2 changed files with 30 additions and 16 deletions
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30
include/scsi/iscsi_proto.h
View File

@@ -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
*/