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[scsi] Generalise iscsi_parse_lun() to scsi_parse_lun()

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This commit is contained in:
Michael Brown 2009-08-09 15:30:07 +01:00
parent 976f12c501
commit d944794680
4 changed files with 48 additions and 48 deletions
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30
src/drivers/block/scsi.c
View File

@ -19,6 +19,7 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <byteswap.h>
#include <errno.h>
@ -334,3 +335,32 @@ int init_scsidev ( struct scsi_device *scsi ) {
return 0;
}
/**
* Parse SCSI LUN
*
* @v lun_string LUN string representation
* @v lun LUN to fill in
* @ret rc Return status code
*/
int scsi_parse_lun ( const char *lun_string, struct scsi_lun *lun ) {
char *p;
int i;
memset ( lun, 0, sizeof ( *lun ) );
if ( lun_string ) {
p = ( char * ) lun_string;
for ( i = 0 ; i < 4 ; i++ ) {
lun->u16[i] = htons ( strtoul ( p, &p, 16 ) );
if ( *p == '\0' )
break;
if ( *p != '-' )
return -EINVAL;
p++;
}
if ( *p )
return -EINVAL;
}
return 0;
}

10
src/include/gpxe/iscsi.h
View File

@ -249,7 +249,7 @@ struct iscsi_bhs_scsi_command {
/** Segment lengths */
union iscsi_segment_lengths lengths;
/** SCSI Logical Unit Number */
uint64_t lun;
struct scsi_lun lun;
/** Initiator Task Tag */
uint32_t itt;
/** Expected data transfer length */
@ -344,7 +344,7 @@ struct iscsi_bhs_data_in {
/** Segment lengths */
union iscsi_segment_lengths lengths;
/** Logical Unit Number */
uint64_t lun;
struct scsi_lun lun;
/** Initiator Task Tag */
uint32_t itt;
/** Target Transfer Tag */
@ -392,7 +392,7 @@ struct iscsi_bhs_data_out {
/** Segment lengths */
union iscsi_segment_lengths lengths;
/** Logical Unit Number */
uint64_t lun;
struct scsi_lun lun;
/** Initiator Task Tag */
uint32_t itt;
/** Target Transfer Tag */
@ -428,7 +428,7 @@ struct iscsi_bhs_r2t {
/** Segment lengths */
union iscsi_segment_lengths lengths;
/** Logical Unit Number */
uint64_t lun;
struct scsi_lun lun;
/** Initiator Task Tag */
uint32_t itt;
/** Target Transfer Tag */
@ -507,7 +507,7 @@ struct iscsi_session {
/** Target IQN */
char *target_iqn;
/** Logical Unit Number (LUN) */
uint64_t lun;
struct scsi_lun lun;
/** Target socket address (recorded only for iBFT) */
struct sockaddr target_sockaddr;

18
src/include/gpxe/scsi.h
View File

@ -240,16 +240,21 @@ struct scsi_command {
int rc;
};
/** A SCSI LUN
*
* This is a four-level LUN as specified by SAM-2, in big-endian
* order.
*/
struct scsi_lun {
uint16_t u16[4];
} __attribute__ (( packed ));
/** A SCSI device */
struct scsi_device {
/** Block device interface */
struct block_device blockdev;
/** Logical unit number (LUN)
*
* This is a four-level LUN as specified by SAM-2, in
* big-endian order.
*/
uint64_t lun;
/** Logical unit number (LUN) */
struct scsi_lun lun;
/**
* Issue SCSI command
*
@ -273,5 +278,6 @@ struct scsi_device {
extern int scsi_detached_command ( struct scsi_device *scsi,
struct scsi_command *command );
extern int init_scsidev ( struct scsi_device *scsi );
extern int scsi_parse_lun ( const char *lun_string, struct scsi_lun *lun );
#endif /* _GPXE_SCSI_H */

38
src/net/tcp/iscsi.c
View File

@ -1605,42 +1605,6 @@ enum iscsi_root_path_component {
NUM_RP_COMPONENTS
};
/**
* Parse iSCSI LUN
*
* @v iscsi iSCSI session
* @v lun_string LUN string representation (as per RFC4173)
* @ret rc Return status code
*/
static int iscsi_parse_lun ( struct iscsi_session *iscsi,
const char *lun_string ) {
union {
uint64_t u64;
uint16_t u16[4];
} lun;
char *p;
int i;
memset ( &lun, 0, sizeof ( lun ) );
if ( lun_string ) {
p = ( char * ) lun_string;
for ( i = 0 ; i < 4 ; i++ ) {
lun.u16[i] = htons ( strtoul ( p, &p, 16 ) );
if ( *p == '\0' )
break;
if ( *p != '-' )
return -EINVAL;
p++;
}
if ( *p )
return -EINVAL;
}
iscsi->lun = lun.u64;
return 0;
}
/**
* Parse iSCSI root path
*
@ -1679,7 +1643,7 @@ static int iscsi_parse_root_path ( struct iscsi_session *iscsi,
iscsi->target_port = strtoul ( rp_comp[RP_PORT], NULL, 10 );
if ( ! iscsi->target_port )
iscsi->target_port = ISCSI_PORT;
if ( ( rc = iscsi_parse_lun ( iscsi, rp_comp[RP_LUN] ) ) != 0 ) {
if ( ( rc = scsi_parse_lun ( rp_comp[RP_LUN], &iscsi->lun ) ) != 0 ) {
DBGC ( iscsi, "iSCSI %p invalid LUN \"%s\"\n",
iscsi, rp_comp[RP_LUN] );
return rc;