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Updated to use asynchronous operation model for iSCSI requests

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Added CHAP authentication
This commit is contained in:
Michael Brown 2006-11-28 00:29:02 +00:00
parent 82342e0b8f
commit 3f0b4d9ed8
5 changed files with 484 additions and 94 deletions
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2
src/drivers/scsi/iscsidev.c
View File

@ -37,7 +37,7 @@ static int iscsi_command ( struct scsi_device *scsi,
struct iscsi_device *iscsidev
= container_of ( scsi, struct iscsi_device, scsi );
return iscsi_issue ( &iscsidev->iscsi, command );
return async_wait ( iscsi_issue ( &iscsidev->iscsi, command ) );
}
/**

77
src/include/gpxe/iscsi.h
View File

@ -9,7 +9,9 @@
#include <stdint.h>
#include <gpxe/tcp.h>
#include <gpxe/async.h>
#include <gpxe/scsi.h>
#include <gpxe/chap.h>
/** Default iSCSI port */
#define ISCSI_PORT 3260
@ -167,13 +169,6 @@ struct iscsi_bhs_login_request {
#define ISCSI_LOGIN_NSG_OPERATIONAL_NEGOTIATION 0x01
#define ISCSI_LOGIN_NSG_FULL_FEATURE_PHASE 0x03
/* Combined stage values and mask */
#define ISCSI_LOGIN_STAGE_MASK ( ISCSI_LOGIN_CSG_MASK | ISCSI_LOGIN_NSG_MASK )
#define ISCSI_LOGIN_STAGE_SEC ( ISCSI_LOGIN_CSG_SECURITY_NEGOTIATION | \
ISCSI_LOGIN_NSG_OPERATIONAL_NEGOTIATION )
#define ISCSI_LOGIN_STAGE_OP ( ISCSI_LOGIN_CSG_OPERATIONAL_NEGOTIATION | \
ISCSI_LOGIN_NSG_FULL_FEATURE_PHASE )
/** ISID IANA format marker */
#define ISCSI_ISID_IANA 0x40000000
@ -483,6 +478,23 @@ enum iscsi_rx_state {
ISCSI_RX_DATA_PADDING,
};
enum iscsi_string_key_value {
STRING_KEY = 0,
STRING_VALUE,
};
/** iSCSI text string processor state */
struct iscsi_string_state {
/** Text string key */
char key[16];
/** Text string value */
char value[8];
/** Key/value flag */
enum iscsi_string_key_value key_value;
/** Index into current string */
unsigned int index;
};
/** An iSCSI session */
struct iscsi_session {
/** TCP connection for this session */
@ -493,6 +505,8 @@ struct iscsi_session {
* constants.
*/
int status;
/** Asynchronous operation for the current iSCSI operation */
struct async_operation aop;
/** Retry count
*
* Number of times that the connection has been retried.
@ -507,6 +521,13 @@ struct iscsi_session {
/** Logical Unit Number (LUN) */
uint64_t lun;
/** Username */
const char *username;
/** Password */
const char *password;
/** CHAP challenge/response */
struct chap_challenge chap;
/** Target session identifying handle
*
* This is assigned by the target when we first log in, and
@ -569,6 +590,8 @@ struct iscsi_session {
enum iscsi_rx_state rx_state;
/** Byte offset within the current RX state */
size_t rx_offset;
/** State of strings received during login phase */
struct iscsi_string_state string;
/** Current SCSI command
*
@ -577,20 +600,44 @@ struct iscsi_session {
struct scsi_command *command;
};
/** Session is currently connected */
#define ISCSI_STATUS_CONNECTED 0x01
/** iSCSI session is currently in the security negotiation phase */
#define ISCSI_STATUS_SECURITY_NEGOTIATION_PHASE \
( ISCSI_LOGIN_CSG_SECURITY_NEGOTIATION | \
ISCSI_LOGIN_NSG_OPERATIONAL_NEGOTIATION )
/** Session has completed */
#define ISCSI_STATUS_DONE 0x02
/** iSCSI session is currently in the operational parameter
* negotiation phase
*/
#define ISCSI_STATUS_OPERATIONAL_NEGOTIATION_PHASE \
( ISCSI_LOGIN_CSG_OPERATIONAL_NEGOTIATION | \
ISCSI_LOGIN_NSG_FULL_FEATURE_PHASE )
/** Session failed */
#define ISCSI_STATUS_ERR 0x04
/** iSCSI session is currently in the full feature phase */
#define ISCSI_STATUS_FULL_FEATURE_PHASE ISCSI_LOGIN_CSG_FULL_FEATURE_PHASE
/** Mask for all iSCSI session phases */
#define ISCSI_STATUS_PHASE_MASK ( ISCSI_LOGIN_CSG_MASK | ISCSI_LOGIN_NSG_MASK )
/** iSCSI session needs to send the initial security negotiation strings */
#define ISCSI_STATUS_STRINGS_SECURITY 0x0100
/** iSCSI session needs to send the CHAP_A string */
#define ISCSI_STATUS_STRINGS_CHAP_ALGORITHM 0x0200
/** iSCSI session needs to send the CHAP response */
#define ISCSI_STATUS_STRINGS_CHAP_RESPONSE 0x0400
/** iSCSI session needs to send the operational negotiation strings */
#define ISCSI_STATUS_STRINGS_OPERATIONAL 0x0800
/** Mask for all iSCSI "needs to send" flags */
#define ISCSI_STATUS_STRINGS_MASK 0xff00
/** Maximum number of retries at connecting */
#define ISCSI_MAX_RETRIES 2
extern int iscsi_issue ( struct iscsi_session *iscsi,
struct scsi_command *command );
extern struct async_operation * iscsi_issue ( struct iscsi_session *iscsi,
struct scsi_command *command );
/** An iSCSI device */
struct iscsi_device {

490
src/net/tcp/iscsi.c
View File

@ -18,6 +18,7 @@
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <vsprintf.h>
#include <errno.h>
#include <assert.h>
@ -37,6 +38,46 @@ static void iscsi_start_tx ( struct iscsi_session *iscsi );
static void iscsi_start_data_out ( struct iscsi_session *iscsi,
unsigned int datasn );
/**
* Mark iSCSI operation as complete
*
* @v iscsi iSCSI session
* @v rc Return status code
*
* Note that iscsi_done() will not close the connection, and must
* therefore be called only when the internal state machines are in an
* appropriate state, otherwise bad things may happen on the next call
* to iscsi_issue(). The general rule is to call iscsi_done() only at
* the end of receiving a PDU; at this point the TX and RX engines
* should both be idle.
*/
static void iscsi_done ( struct iscsi_session *iscsi, int rc ) {
/* Clear current SCSI command */
iscsi->command = NULL;
/* Free any memory that may have been used for CHAP */
chap_finish ( &iscsi->chap );
/* Mark asynchronous operation as complete */
async_done ( &iscsi->aop, rc );
}
/**
* Mark iSCSI operation as complete, and close TCP connection
*
* @v iscsi iSCSI session
* @v rc Return status code
*/
static void iscsi_close ( struct iscsi_session *iscsi, int rc ) {
/* Clear session status */
iscsi->status = 0;
/* Close TCP connection */
tcp_close ( &iscsi->tcp );
/* Mark iSCSI operation as complete */
iscsi_done ( iscsi, rc );
}
/****************************************************************************
*
* iSCSI SCSI command issuing
@ -112,9 +153,11 @@ static void iscsi_rx_scsi_response ( struct iscsi_session *iscsi, void *data,
iscsi->command->status = response->status;
/* Mark as completed, with error if applicable */
iscsi->status |= ISCSI_STATUS_DONE;
if ( response->response != ISCSI_RESPONSE_COMMAND_COMPLETE )
iscsi->status |= ISCSI_STATUS_ERR;
if ( response->response == ISCSI_RESPONSE_COMMAND_COMPLETE ) {
iscsi_done ( iscsi, 0 );
} else {
iscsi_done ( iscsi, -EIO );
}
}
/**
@ -146,7 +189,7 @@ static void iscsi_rx_data_in ( struct iscsi_session *iscsi, void *data,
if ( ( offset + len ) == iscsi->command->data_in_len ) {
assert ( data_in->flags & ISCSI_FLAG_FINAL );
assert ( remaining == 0 );
iscsi->status |= ISCSI_STATUS_DONE;
iscsi_done ( iscsi, 0 );
}
}
@ -258,6 +301,32 @@ static void iscsi_tx_data_out ( struct iscsi_session *iscsi,
*
*/
/**
* Version of snprintf() that accepts a signed buffer size
*
* @v buf Buffer into which to write the string
* @v size Size of buffer
* @v fmt Format string
* @v args Arguments corresponding to the format string
* @ret len Length of formatted string
*
* This is a utility function for iscsi_build_login_request_strings().
*/
static int ssnprintf ( char *buf, ssize_t ssize, const char *fmt, ... ) {
va_list args;
int len;
/* Treat negative buffer size as zero buffer size */
if ( ssize < 0 )
ssize = 0;
/* Hand off to vsnprintf */
va_start ( args, fmt );
len = vsnprintf ( buf, ssize, fmt, args );
va_end ( args );
return len;
}
/**
* Build iSCSI login request strings
*
@ -291,45 +360,57 @@ static void iscsi_tx_data_out ( struct iscsi_session *iscsi,
*/
static int iscsi_build_login_request_strings ( struct iscsi_session *iscsi,
void *data, size_t len ) {
struct iscsi_bhs_login_request *request = &iscsi->tx_bhs.login_request;
unsigned int used = 0;
unsigned int i;
switch ( request->flags & ISCSI_LOGIN_CSG_MASK ) {
case ISCSI_LOGIN_CSG_SECURITY_NEGOTIATION:
return snprintf ( data, len,
"InitiatorName=%s%c"
"TargetName=%s%c"
"SessionType=Normal%c"
"AuthMethod=CHAP,None%c"
"CHAP_A=5%c",
iscsi->initiator, 0, iscsi->target, 0,
0, 0, 0 );
case ISCSI_LOGIN_CSG_OPERATIONAL_NEGOTIATION:
return snprintf ( data, len,
"HeaderDigest=None%c"
"DataDigest=None%c"
"InitialR2T=Yes%c"
"DefaultTime2Wait=0%c"
"DefaultTime2Retain=0%c"
"MaxOutstandingR2T=1%c"
"DataPDUInOrder=Yes%c"
"DataSequenceInOrder=Yes%c"
"ErrorRecoveryLevel=0%c",
0, 0, 0, 0, 0, 0, 0, 0, 0 );
default:
assert ( 0 );
return 0;
if ( iscsi->status & ISCSI_STATUS_STRINGS_SECURITY ) {
used += ssnprintf ( data + used, len - used,
"InitiatorName=%s%c"
"TargetName=%s%c"
"SessionType=Normal%c"
"AuthMethod=CHAP,None%c",
iscsi->initiator, 0, iscsi->target, 0,
0, 0 );
}
if ( iscsi->status & ISCSI_STATUS_STRINGS_CHAP_ALGORITHM ) {
used += ssnprintf ( data + used, len - used, "CHAP_A=5%c", 0 );
}
if ( iscsi->status & ISCSI_STATUS_STRINGS_CHAP_RESPONSE ) {
used += ssnprintf ( data + used, len - used,
"CHAP_N=%s%cCHAP_R=0x",
iscsi->username, 0 );
for ( i = 0 ; i < iscsi->chap.response_len ; i++ ) {
used += ssnprintf ( data + used, len - used, "%02x",
iscsi->chap.response[i] );
}
used += ssnprintf ( data + used, len - used, "%c", 0 );
}
if ( iscsi->status & ISCSI_STATUS_STRINGS_OPERATIONAL ) {
used += ssnprintf ( data + used, len - used,
"HeaderDigest=None%c"
"DataDigest=None%c"
"InitialR2T=Yes%c"
"DefaultTime2Wait=0%c"
"DefaultTime2Retain=0%c"
"MaxOutstandingR2T=1%c"
"DataPDUInOrder=Yes%c"
"DataSequenceInOrder=Yes%c"
"ErrorRecoveryLevel=0%c",
0, 0, 0, 0, 0, 0, 0, 0, 0 );
}
return used;
}
/**
* Build iSCSI login request BHS
*
* @v iscsi iSCSI session
* @v stage Current stage of iSCSI login
* @v send_strings Send login strings with this login request
*/
static void iscsi_start_login ( struct iscsi_session *iscsi,
int stage, int send_strings ) {
static void iscsi_start_login ( struct iscsi_session *iscsi ) {
struct iscsi_bhs_login_request *request = &iscsi->tx_bhs.login_request;
int len;
@ -337,13 +418,11 @@ static void iscsi_start_login ( struct iscsi_session *iscsi,
iscsi_start_tx ( iscsi );
request->opcode = ( ISCSI_OPCODE_LOGIN_REQUEST |
ISCSI_FLAG_IMMEDIATE );
request->flags = ( ISCSI_LOGIN_FLAG_TRANSITION | stage );
request->flags = ( ( iscsi->status & ISCSI_STATUS_PHASE_MASK ) |
ISCSI_LOGIN_FLAG_TRANSITION );
/* version_max and version_min left as zero */
if ( send_strings ) {
len = iscsi_build_login_request_strings ( iscsi, NULL, 0 );
ISCSI_SET_LENGTHS ( request->lengths, 0, len );
}
len = iscsi_build_login_request_strings ( iscsi, NULL, 0 );
ISCSI_SET_LENGTHS ( request->lengths, 0, len );
request->isid_iana_en = htonl ( ISCSI_ISID_IANA |
IANA_EN_FEN_SYSTEMS );
/* isid_iana_qual left as zero */
@ -354,6 +433,18 @@ static void iscsi_start_login ( struct iscsi_session *iscsi,
request->expstatsn = htonl ( iscsi->statsn + 1 );
}
/**
* Complete iSCSI login request PDU transmission
*
* @v iscsi iSCSI session
*
*/
static void iscsi_login_request_done ( struct iscsi_session *iscsi ) {
/* Clear any "strings to send" flags */
iscsi->status &= ~ISCSI_STATUS_STRINGS_MASK;
}
/**
* Transmit data segment of an iSCSI login request PDU
*
@ -370,6 +461,238 @@ static void iscsi_tx_login_request ( struct iscsi_session *iscsi,
len - iscsi->tx_offset );
}
/**
* Handle iSCSI AuthMethod text value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*/
static void iscsi_handle_authmethod_value ( struct iscsi_session *iscsi,
int finished ) {
struct iscsi_string_state *string = &iscsi->string;
if ( ! finished )
return;
/* If server requests CHAP, send the CHAP_A string */
if ( strcmp ( string->value, "CHAP" ) == 0 ) {
DBG ( "iSCSI %p initiating CHAP authentication\n", iscsi );
iscsi->status |= ISCSI_STATUS_STRINGS_CHAP_ALGORITHM;
}
}
/**
* Handle iSCSI CHAP_A text value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*/
static void iscsi_handle_chap_a_value ( struct iscsi_session *iscsi,
int finished ) {
struct iscsi_string_state *string = &iscsi->string;
int rc;
if ( ! finished )
return;
/* We only ever offer "5" (i.e. MD5) as an algorithm, so if
* the server responds with anything else it is a protocol
* violation.
*/
if ( strcmp ( string->value, "5" ) != 0 ) {
DBG ( "iSCSI %p got invalid CHAP algorithm \"%s\"\n",
iscsi, string->value );
}
/* Prepare for CHAP with MD5 */
if ( ( rc = chap_init ( &iscsi->chap, &md5_algorithm ) ) != 0 ) {
DBG ( "iSCSI %p could not initialise CHAP\n", iscsi );
iscsi_close ( iscsi, rc );
}
}
/**
* Handle iSCSI CHAP_I text value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*/
static void iscsi_handle_chap_i_value ( struct iscsi_session *iscsi,
int finished ) {
struct iscsi_string_state *string = &iscsi->string;
unsigned int identifier;
char *endp;
if ( ! finished )
return;
/* The CHAP identifier is an integer value */
identifier = strtoul ( string->value, &endp, 0 );
if ( *endp != '\0' ) {
DBG ( "iSCSI %p saw invalid CHAP identifier \"%s\"\n",
iscsi, string->value );
}
/* Identifier and secret are the first two components of the
* challenge.
*/
chap_set_identifier ( &iscsi->chap, identifier );
chap_update ( &iscsi->chap, iscsi->password,
strlen ( iscsi->password ) );
}
/**
* Handle iSCSI CHAP_C text value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*/
static void iscsi_handle_chap_c_value ( struct iscsi_session *iscsi,
int finished ) {
struct iscsi_string_state *string = &iscsi->string;
uint8_t byte;
char *endp;
/* Once the whole challenge is received, calculate the response */
if ( finished ) {
DBG ( "iSCSI %p sending CHAP response\n", iscsi );
chap_respond ( &iscsi->chap );
iscsi->status |= ISCSI_STATUS_STRINGS_CHAP_RESPONSE;
return;
}
/* Wait until a complete octet ("0x??") is received */
if ( string->index != 4 )
return;
/* Add octet to challenge */
byte = strtoul ( string->value, &endp, 0 );
if ( *endp != '\0' ) {
DBG ( "iSCSI %p saw invalid CHAP challenge portion \"%s\"\n",
iscsi, string->value );
}
chap_update ( &iscsi->chap, &byte, sizeof ( byte ) );
/* Reset value back to "0x" */
string->index = 2;
}
/** An iSCSI text string that we want to handle */
struct iscsi_string_type {
/** String name
*
* This is the portion before the "=" sign,
* e.g. InitiatorName, CHAP_A, etc.
*/
const char *name;
/** Handle iSCSI string value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*
* Process the string in @c iscsi->string. This method will
* be called once for each character in the string, and once
* again at the end of the string.
*/
void ( * handle_value ) ( struct iscsi_session *iscsi, int finished );
};
/** iSCSI text strings that we want to handle */
struct iscsi_string_type iscsi_string_types[] = {
{ "AuthMethod", iscsi_handle_authmethod_value },
{ "CHAP_A", iscsi_handle_chap_a_value },
{ "CHAP_I", iscsi_handle_chap_i_value },
{ "CHAP_C", iscsi_handle_chap_c_value },
{ NULL, NULL }
};
/**
* Handle iSCSI string value
*
* @v iscsi iSCSI session
* @v finished Value is complete
*
* Process the string in @c iscsi->string. This function will be
* called once for each character in the string, and once again at the
* end of the string.
*/
static void iscsi_handle_string_value ( struct iscsi_session *iscsi,
int finished ) {
struct iscsi_string_state *string = &iscsi->string;
struct iscsi_string_type *type = iscsi_string_types;
assert ( string->key_value == STRING_VALUE );
for ( type = iscsi_string_types ; type->name ; type++ ) {
if ( strcmp ( type->name, string->key ) == 0 ) {
if ( string->index <= 1 ) {
DBG ( "iSCSI %p handling key \"%s\"\n",
iscsi, string->key );
}
type->handle_value ( iscsi, finished );
return;
}
}
if ( string->index <= 1 )
DBG ( "iSCSI %p ignoring key \"%s\"\n", iscsi, string->key );
}
/**
* Handle byte of an iSCSI string
*
* @v iscsi iSCSI session
* @v byte Byte of string
*
* Strings are handled a byte at a time in order to simplify the
* logic, and to ensure that we can provably cope with the TCP packet
* boundaries coming at inconvenient points, such as halfway through a
* string.
*/
static void iscsi_handle_string_byte ( struct iscsi_session *iscsi,
uint8_t byte ) {
struct iscsi_string_state *string = &iscsi->string;
if ( string->key_value == STRING_KEY ) {
switch ( byte ) {
case '\0':
/* Premature termination */
DBG ( "iSCSI %p premature key termination on \"%s\"\n",
iscsi, string->key );
string->index = 0;
break;
case '=':
/* End of key */
string->key_value = STRING_VALUE;
string->index = 0;
break;
default:
/* Part of key */
if ( string->index < ( sizeof ( string->key ) - 1 ) ) {
string->key[string->index++] = byte;
string->key[string->index] = '\0';
}
break;
}
} else {
switch ( byte ) {
case '\0':
/* End of string */
iscsi_handle_string_value ( iscsi, 1 );
string->key_value = STRING_KEY;
string->index = 0;
break;
default:
/* Part of value */
if ( string->index < ( sizeof ( string->value ) - 1 )){
string->value[string->index++] = byte;
string->value[string->index] = '\0';
iscsi_handle_string_value ( iscsi, 0 );
}
break;
}
}
}
/**
* Receive data segment of an iSCSI login response PDU
*
@ -379,10 +702,8 @@ static void iscsi_tx_login_request ( struct iscsi_session *iscsi,
* @v remaining Data remaining after this data
*
*/
static void iscsi_rx_login_response ( struct iscsi_session *iscsi,
void *data __unused,
size_t len __unused,
size_t remaining __unused ) {
static void iscsi_rx_login_response ( struct iscsi_session *iscsi, void *data,
size_t len, size_t remaining ) {
struct iscsi_bhs_login_response *response
= &iscsi->rx_bhs.login_response;
@ -390,33 +711,49 @@ static void iscsi_rx_login_response ( struct iscsi_session *iscsi,
if ( response->status_class != 0 ) {
printf ( "iSCSI login failure: class %02x detail %02x\n",
response->status_class, response->status_detail );
iscsi->status |= ( ISCSI_STATUS_DONE | ISCSI_STATUS_ERR );
tcp_close ( &iscsi->tcp );
iscsi_close ( iscsi, -EPERM );
return;
}
/* If server did not transition, send back another login
* request without any login strings.
*/
if ( ! ( response->flags & ISCSI_LOGIN_FLAG_TRANSITION ) ) {
iscsi_start_login ( iscsi, ( response->flags &
ISCSI_LOGIN_STAGE_MASK ), 0 );
/* Process strings data */
for ( ; len-- ; data++ ) {
iscsi_handle_string_byte ( iscsi, * ( ( uint8_t * ) data ) );
}
if ( remaining )
return;
/* Handle login transitions */
if ( response->flags & ISCSI_LOGIN_FLAG_TRANSITION ) {
switch ( response->flags & ISCSI_LOGIN_NSG_MASK ) {
case ISCSI_LOGIN_NSG_OPERATIONAL_NEGOTIATION:
iscsi->status =
( ISCSI_STATUS_OPERATIONAL_NEGOTIATION_PHASE |
ISCSI_STATUS_STRINGS_OPERATIONAL );
break;
case ISCSI_LOGIN_NSG_FULL_FEATURE_PHASE:
iscsi->status = ISCSI_STATUS_FULL_FEATURE_PHASE;
break;
default:
DBG ( "iSCSI %p got invalid response flags %02x\n",
iscsi, response->flags );
iscsi_close ( iscsi, -EIO );
return;
}
}
/* If we are transitioning to the operational phase, send the
* operational phase login request.
/* Send next login request PDU if we haven't reached the full
* feature phase yet.
*/
if ( ( response->flags & ISCSI_LOGIN_NSG_MASK ) ==
ISCSI_LOGIN_NSG_OPERATIONAL_NEGOTIATION ) {
iscsi_start_login ( iscsi, ISCSI_LOGIN_STAGE_OP, 1 );
if ( ( iscsi->status & ISCSI_STATUS_PHASE_MASK ) !=
ISCSI_STATUS_FULL_FEATURE_PHASE ) {
iscsi_start_login ( iscsi );
return;
}
/* Record TSIH for future reference */
iscsi->tsih = ntohl ( response->tsih );
/* Send the SCSI command */
/* Send the actual SCSI command */
iscsi_start_command ( iscsi );
}
@ -492,6 +829,8 @@ static void iscsi_tx_done ( struct iscsi_session *iscsi ) {
switch ( common->opcode & ISCSI_OPCODE_MASK ) {
case ISCSI_OPCODE_DATA_OUT:
iscsi_data_out_done ( iscsi );
case ISCSI_OPCODE_LOGIN_REQUEST:
iscsi_login_request_done ( iscsi );
default:
/* No action */
break;
@ -629,8 +968,10 @@ static void iscsi_rx_data ( struct iscsi_session *iscsi, void *data,
iscsi_rx_r2t ( iscsi, data, len, remaining );
break;
default:
if ( remaining )
return;
printf ( "Unknown iSCSI opcode %02x\n", response->opcode );
iscsi->status |= ( ISCSI_STATUS_DONE | ISCSI_STATUS_ERR );
iscsi_done ( iscsi, -EOPNOTSUPP );
break;
}
}
@ -752,18 +1093,18 @@ static void iscsi_newdata ( struct tcp_connection *conn, void *data,
* @v status Error code, if any
*
*/
static void iscsi_closed ( struct tcp_connection *conn, int status __unused ) {
static void iscsi_closed ( struct tcp_connection *conn, int status ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
/* Clear connected flag */
iscsi->status &= ~ISCSI_STATUS_CONNECTED;
/* Clear session status */
iscsi->status = 0;
/* Retry connection if within the retry limit, otherwise fail */
if ( ++iscsi->retry_count <= ISCSI_MAX_RETRIES ) {
tcp_connect ( conn );
} else {
printf ( "iSCSI retry count exceeded\n" );
iscsi->status |= ( ISCSI_STATUS_DONE | ISCSI_STATUS_ERR );
iscsi_done ( iscsi, status );
}
}
@ -777,7 +1118,8 @@ static void iscsi_connected ( struct tcp_connection *conn ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
/* Set connected flag and reset retry count */
iscsi->status |= ISCSI_STATUS_CONNECTED;
iscsi->status = ( ISCSI_STATUS_SECURITY_NEGOTIATION_PHASE |
ISCSI_STATUS_STRINGS_SECURITY );
iscsi->retry_count = 0;
/* Prepare to receive PDUs. */
@ -788,7 +1130,7 @@ static void iscsi_connected ( struct tcp_connection *conn ) {
iscsi->itt++;
/* Start logging in */
iscsi_start_login ( iscsi, ISCSI_LOGIN_STAGE_SEC, 1 );
iscsi_start_login ( iscsi );
}
/** iSCSI TCP operations */
@ -805,14 +1147,14 @@ static struct tcp_operations iscsi_tcp_operations = {
*
* @v iscsi iSCSI session
* @v command SCSI command
* @ret rc Return status code
* @ret aop Asynchronous operation for this SCSI command
*/
int iscsi_issue ( struct iscsi_session *iscsi,
struct scsi_command *command ) {
struct async_operation * iscsi_issue ( struct iscsi_session *iscsi,
struct scsi_command *command ) {
assert ( iscsi->command == NULL );
iscsi->command = command;
iscsi->status &= ~( ISCSI_STATUS_DONE | ISCSI_STATUS_ERR );
if ( iscsi->status & ISCSI_STATUS_CONNECTED ) {
if ( iscsi->status ) {
iscsi_start_command ( iscsi );
tcp_senddata ( &iscsi->tcp );
} else {
@ -820,11 +1162,5 @@ int iscsi_issue ( struct iscsi_session *iscsi,
tcp_connect ( &iscsi->tcp );
}
while ( ! ( iscsi->status & ISCSI_STATUS_DONE ) ) {
step();
}
iscsi->command = NULL;
return ( ( iscsi->status & ISCSI_STATUS_ERR ) ? -EIO : 0 );
return &iscsi->aop;
}

5
src/tests/dhcptest.c
View File

@ -16,6 +16,8 @@ static int test_dhcp_aoe_boot ( struct net_device *netdev,
static int test_dhcp_iscsi_boot ( struct net_device *netdev, char *iscsiname ) {
char *initiator_iqn = "iqn.1900-01.localdomain.localhost:initiator";
char *username = "joe";
char *password = "secret";
char *target_iqn;
union {
struct sockaddr_in sin;
@ -33,7 +35,8 @@ static int test_dhcp_iscsi_boot ( struct net_device *netdev, char *iscsiname ) {
}
inet_aton ( iscsiname, &target.sin.sin_addr );
return test_iscsiboot ( initiator_iqn, &target.st, target_iqn, netdev );
return test_iscsiboot ( initiator_iqn, &target.st, target_iqn,
username, password, netdev );
}
static int test_dhcp_hello ( char *helloname ) {

4
src/tests/iscsiboot.c
View File

@ -13,6 +13,8 @@ static struct iscsi_device test_iscsidev;
int test_iscsiboot ( const char *initiator_iqn,
struct sockaddr_tcpip *target,
const char *target_iqn,
const char *username,
const char *password,
struct net_device *netdev ) {
struct int13_drive drive;
int rc;
@ -22,6 +24,8 @@ int test_iscsiboot ( const char *initiator_iqn,
sizeof ( test_iscsidev.iscsi.tcp.peer ) );
test_iscsidev.iscsi.initiator = initiator_iqn;
test_iscsidev.iscsi.target = target_iqn;
test_iscsidev.iscsi.username = username;
test_iscsidev.iscsi.password = password;
printf ( "Initialising %s\n", target_iqn );
if ( ( rc = init_iscsidev ( &test_iscsidev ) ) != 0 ) {