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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-03-22 22:14:09 +0100 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-07-25 09:48:08 +0200 |
| commit | 8304bbceee505742925b487fd8ea56e1f8b4b805 (patch) | |
| tree | 4776c640eb8aab7e8a957f9890a7e49a48855d2d /include/scsi | |
| parent | iscsi: Use struct scsi_lun in iscsi structs instead of u8[8] (diff) | |
| download | linux-8304bbceee505742925b487fd8ea56e1f8b4b805.tar.xz linux-8304bbceee505742925b487fd8ea56e1f8b4b805.zip | |
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: 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>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/iscsi_proto.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h index f5f83534fc13..988ba06b3ad6 100644 --- a/include/scsi/iscsi_proto.h +++ b/include/scsi/iscsi_proto.h @@ -29,10 +29,40 @@ /* 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 */ #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) |