@ -24,6 +24,11 @@
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* See SPC4 , section 7.5 " Protocol specific parameters " for details
* on the formats implemented in this file .
*/
# include <linux/kernel.h>
# include <linux/string.h>
# include <linux/ctype.h>
@ -39,103 +44,26 @@
# include "target_core_internal.h"
# include "target_core_pr.h"
/*
* Handlers for Serial Attached SCSI ( SAS )
*/
u32 sas_get_pr_transport_id (
struct se_portal_group * se_tpg ,
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
static int sas_get_pr_transport_id (
struct se_node_acl * nacl ,
int * format_code ,
unsigned char * buf )
{
unsigned char * ptr ;
int ret ;
/*
* Set PROTOCOL IDENTIFIER to 6 h for SAS
*/
buf [ 0 ] = 0x06 ;
/*
* From spc4r17 , 7.5 .4 .7 TransportID for initiator ports using SCSI
* over SAS Serial SCSI Protocol
*/
ptr = & se_nacl - > initiatorname [ 4 ] ; /* Skip over 'naa. prefix */
ret = hex2bin ( & buf [ 4 ] , ptr , 8 ) ;
if ( ret < 0 )
pr_debug ( " sas transport_id: invalid hex string \n " ) ;
/*
* The SAS Transport ID is a hardcoded 24 - byte length
*/
return 24 ;
}
EXPORT_SYMBOL ( sas_get_pr_transport_id ) ;
u32 sas_get_pr_transport_id_len (
struct se_portal_group * se_tpg ,
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
int * format_code )
{
* format_code = 0 ;
/*
* From spc4r17 , 7.5 .4 .7 TransportID for initiator ports using SCSI
* over SAS Serial SCSI Protocol
*
* The SAS Transport ID is a hardcoded 24 - byte length
*/
return 24 ;
}
EXPORT_SYMBOL ( sas_get_pr_transport_id_len ) ;
/*
* Used for handling SCSI fabric dependent TransportIDs in SPC - 3 and above
* Persistent Reservation SPEC_I_PT = 1 and PROUT REGISTER_AND_MOVE operations .
*/
char * sas_parse_pr_out_transport_id (
struct se_portal_group * se_tpg ,
const char * buf ,
u32 * out_tid_len ,
char * * port_nexus_ptr )
{
/*
* Assume the FORMAT CODE 00 b from spc4r17 , 7.5 .4 .7 TransportID
* for initiator ports using SCSI over SAS Serial SCSI Protocol
*
* The TransportID for a SAS Initiator Port is of fixed size of
* 24 bytes , and SAS does not contain a I_T nexus identifier ,
* so we return the * * port_nexus_ptr set to NULL .
*/
* port_nexus_ptr = NULL ;
* out_tid_len = 24 ;
return ( char * ) & buf [ 4 ] ;
}
EXPORT_SYMBOL ( sas_parse_pr_out_transport_id ) ;
/* Skip over 'naa. prefix */
ret = hex2bin ( & buf [ 4 ] , & nacl - > initiatorname [ 4 ] , 8 ) ;
if ( ret ) {
pr_debug ( " %s: invalid hex string \n " , __func__ ) ;
return ret ;
}
/*
* Handlers for Fibre Channel Protocol ( FCP )
*/
u32 fc_get_pr_transport_id_len (
struct se_portal_group * se_tpg ,
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
int * format_code )
{
* format_code = 0 ;
/*
* The FC Transport ID is a hardcoded 24 - byte length
*/
return 24 ;
}
EXPORT_SYMBOL ( fc_get_pr_transport_id_len ) ;
u32 fc_get_pr_transport_id (
struct se_portal_group * se_tpg ,
static int fc_get_pr_transport_id (
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
int * format_code ,
unsigned char * buf )
{
@ -144,24 +72,20 @@ u32 fc_get_pr_transport_id(
u32 off = 8 ;
/*
* PROTOCOL IDENTIFIER is 0 h for FCP - 2
*
* From spc4r17 , 7.5 .4 .2 TransportID for initiator ports using
* SCSI over Fibre Channel
*
* We convert the ASCII formatted N Port name into a binary
* encoded TransportID .
*/
ptr = & se_nacl - > initiatorname [ 0 ] ;
for ( i = 0 ; i < 24 ; ) {
if ( ! strncmp ( & ptr [ i ] , " : " , 1 ) ) {
i + + ;
continue ;
}
ret = hex2bin ( & buf [ off + + ] , & ptr [ i ] , 1 ) ;
if ( ret < 0 )
pr_debug ( " fc transport_id: invalid hex string \n " ) ;
if ( ret < 0 ) {
pr_debug ( " %s: invalid hex string \n " , __func__ ) ;
return ret ;
}
i + = 2 ;
}
/*
@ -169,31 +93,52 @@ u32 fc_get_pr_transport_id(
*/
return 24 ;
}
EXPORT_SYMBOL ( fc_get_pr_transport_id ) ;
char * fc_parse_pr_out_transport_id (
struct se_portal_group * se_tpg ,
const char * buf ,
u32 * out_tid_len ,
char * * port_nexus_ptr )
static int sbp_get_pr_transport_id (
struct se_node_acl * nacl ,
int * format_code ,
unsigned char * buf )
{
/*
* The TransportID for a FC N Port is of fixed size of
* 24 bytes , and FC does not contain a I_T nexus identifier ,
* so we return the * * port_nexus_ptr set to NULL .
*/
* port_nexus_ptr = NULL ;
* out_tid_len = 24 ;
int ret ;
ret = hex2bin ( & buf [ 8 ] , nacl - > initiatorname , 8 ) ;
if ( ret ) {
pr_debug ( " %s: invalid hex string \n " , __func__ ) ;
return ret ;
}
return ( char * ) & buf [ 8 ] ;
return 24 ;
}
EXPORT_SYMBOL ( fc_parse_pr_out_transport_id ) ;
/*
* Handlers for Internet Small Computer Systems Interface ( iSCSI )
*/
u32 iscsi_get_pr_transport_id (
struct se_portal_group * se_tpg ,
static int srp_get_pr_transport_id (
struct se_node_acl * nacl ,
int * format_code ,
unsigned char * buf )
{
const char * p ;
unsigned len , count , leading_zero_bytes ;
int rc ;
p = nacl - > initiatorname ;
if ( strncasecmp ( p , " 0x " , 2 ) = = 0 )
p + = 2 ;
len = strlen ( p ) ;
if ( len % 2 )
return - EINVAL ;
count = min ( len / 2 , 16U ) ;
leading_zero_bytes = 16 - count ;
memset ( buf + 8 , 0 , leading_zero_bytes ) ;
rc = hex2bin ( buf + 8 + leading_zero_bytes , p , count ) ;
if ( rc < 0 ) {
pr_debug ( " hex2bin failed for %s: %d \n " , __func__ , rc ) ;
return rc ;
}
return 24 ;
}
static int iscsi_get_pr_transport_id (
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
int * format_code ,
@ -203,10 +148,6 @@ u32 iscsi_get_pr_transport_id(
u16 len = 0 ;
spin_lock_irq ( & se_nacl - > nacl_sess_lock ) ;
/*
* Set PROTOCOL IDENTIFIER to 5 h for iSCSI
*/
buf [ 0 ] = 0x05 ;
/*
* From spc4r17 Section 7.5 .4 .6 : TransportID for initiator
* ports using SCSI over iSCSI .
@ -286,10 +227,8 @@ u32 iscsi_get_pr_transport_id(
return len ;
}
EXPORT_SYMBOL ( iscsi_get_pr_transport_id ) ;
u32 iscsi_get_pr_transport_id_len (
struct se_portal_group * se_tpg ,
static int iscsi_get_pr_transport_id_len (
struct se_node_acl * se_nacl ,
struct t10_pr_registration * pr_reg ,
int * format_code )
@ -332,9 +271,8 @@ u32 iscsi_get_pr_transport_id_len(
return len ;
}
EXPORT_SYMBOL ( iscsi_get_pr_transport_id_len ) ;
char * iscsi_parse_pr_out_transport_id (
static char * iscsi_parse_pr_out_transport_id (
struct se_portal_group * se_tpg ,
const char * buf ,
u32 * out_tid_len ,
@ -421,4 +359,79 @@ char *iscsi_parse_pr_out_transport_id(
return ( char * ) & buf [ 4 ] ;
}
EXPORT_SYMBOL ( iscsi_parse_pr_out_transport_id ) ;
int target_get_pr_transport_id_len ( struct se_node_acl * nacl ,
struct t10_pr_registration * pr_reg , int * format_code )
{
switch ( nacl - > se_tpg - > proto_id ) {
case SCSI_PROTOCOL_FCP :
case SCSI_PROTOCOL_SBP :
case SCSI_PROTOCOL_SRP :
case SCSI_PROTOCOL_SAS :
break ;
case SCSI_PROTOCOL_ISCSI :
return iscsi_get_pr_transport_id_len ( nacl , pr_reg , format_code ) ;
default :
pr_err ( " Unknown proto_id: 0x%02x \n " , nacl - > se_tpg - > proto_id ) ;
return - EINVAL ;
}
/*
* Most transports use a fixed length 24 byte identifier .
*/
* format_code = 0 ;
return 24 ;
}
int target_get_pr_transport_id ( struct se_node_acl * nacl ,
struct t10_pr_registration * pr_reg , int * format_code ,
unsigned char * buf )
{
switch ( nacl - > se_tpg - > proto_id ) {
case SCSI_PROTOCOL_SAS :
return sas_get_pr_transport_id ( nacl , format_code , buf ) ;
case SCSI_PROTOCOL_SBP :
return sbp_get_pr_transport_id ( nacl , format_code , buf ) ;
case SCSI_PROTOCOL_SRP :
return srp_get_pr_transport_id ( nacl , format_code , buf ) ;
case SCSI_PROTOCOL_FCP :
return fc_get_pr_transport_id ( nacl , format_code , buf ) ;
case SCSI_PROTOCOL_ISCSI :
return iscsi_get_pr_transport_id ( nacl , pr_reg , format_code ,
buf ) ;
default :
pr_err ( " Unknown proto_id: 0x%02x \n " , nacl - > se_tpg - > proto_id ) ;
return - EINVAL ;
}
}
const char * target_parse_pr_out_transport_id ( struct se_portal_group * tpg ,
const char * buf , u32 * out_tid_len , char * * port_nexus_ptr )
{
u32 offset ;
switch ( tpg - > proto_id ) {
case SCSI_PROTOCOL_SAS :
/*
* Assume the FORMAT CODE 00 b from spc4r17 , 7.5 .4 .7 TransportID
* for initiator ports using SCSI over SAS Serial SCSI Protocol .
*/
offset = 4 ;
break ;
case SCSI_PROTOCOL_SBP :
case SCSI_PROTOCOL_SRP :
case SCSI_PROTOCOL_FCP :
offset = 8 ;
break ;
case SCSI_PROTOCOL_ISCSI :
return iscsi_parse_pr_out_transport_id ( tpg , buf , out_tid_len ,
port_nexus_ptr ) ;
default :
pr_err ( " Unknown proto_id: 0x%02x \n " , tpg - > proto_id ) ;
return NULL ;
}
* port_nexus_ptr = NULL ;
* out_tid_len = 24 ;
return buf + offset ;
}
Christoph Hellwig
10 years ago
committed by