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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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77
src/include/gpxe/iscsi.h
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@@ -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 {