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[SCSI] libiscsi, iscsi_tcp: add device support

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This patch adds logical unit reset support. This should work for ib_iser,
but I have not finished testing that driver so it is not hooked in yet.

This patch also temporarily reverts the iscsi_tcp r2t write out patch.
That code is completely rewritten in this patchset.

Signed-off-by: Mike Christie <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Mike Christie 2007-12-13 12:43:20 -06:00 • committed by James Bottomley
commit 843c0a8a76
8 changed files with 396 additions and 322 deletions
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2
include/scsi/iscsi_if.h
View file

@ -236,6 +236,7 @@ enum iscsi_param {
ISCSI_PARAM_PASSWORD,
ISCSI_PARAM_PASSWORD_IN,
ISCSI_PARAM_FAST_ABORT,
/* must always be last */
ISCSI_PARAM_MAX,
};
@ -266,6 +267,7 @@ enum iscsi_param {
#define ISCSI_USERNAME_IN (1 << ISCSI_PARAM_USERNAME_IN)
#define ISCSI_PASSWORD (1 << ISCSI_PARAM_PASSWORD)
#define ISCSI_PASSWORD_IN (1 << ISCSI_PARAM_PASSWORD_IN)
#define ISCSI_FAST_ABORT (1 << ISCSI_PARAM_FAST_ABORT)
/* iSCSI HBA params */
enum iscsi_host_param {

2
include/scsi/iscsi_proto.h
View file

@ -600,6 +600,8 @@ struct iscsi_reject {
#define ISCSI_MIN_MAX_BURST_LEN 512
#define ISCSI_MAX_MAX_BURST_LEN 16777215
#define ISCSI_DEF_TIME2WAIT 2
/************************* RFC 3720 End *****************************/
#endif /* ISCSI_PROTO_H */

25
include/scsi/libiscsi.h
View file

@ -57,11 +57,14 @@ struct iscsi_nopin;
#define ISCSI_MAX_CMD_PER_LUN 128
/* Task Mgmt states */
#define TMABORT_INITIAL 0x0
#define TMABORT_SUCCESS 0x1
#define TMABORT_FAILED 0x2
#define TMABORT_TIMEDOUT 0x3
#define TMABORT_NOT_FOUND 0x4
enum {
TMF_INITIAL,
TMF_QUEUED,
TMF_SUCCESS,
TMF_FAILED,
TMF_TIMEDOUT,
TMF_NOT_FOUND,
};
/* Connection suspend "bit" */
#define ISCSI_SUSPEND_BIT 1
@ -91,7 +94,6 @@ enum {
ISCSI_TASK_COMPLETED,
ISCSI_TASK_PENDING,
ISCSI_TASK_RUNNING,
ISCSI_TASK_ABORTING,
};
struct iscsi_cmd_task {
@ -110,7 +112,6 @@ struct iscsi_cmd_task {
unsigned data_count; /* remaining Data-Out */
struct scsi_cmnd *sc; /* associated SCSI cmd*/
struct iscsi_conn *conn; /* used connection */
struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
/* state set/tested under session->lock */
int state;
@ -152,10 +153,11 @@ struct iscsi_conn {
struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
/* xmit */
struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
struct list_head mgmtqueue; /* mgmt (control) xmit queue */
struct list_head mgmt_run_list; /* list of control tasks */
struct list_head xmitqueue; /* data-path cmd queue */
struct list_head run_list; /* list of cmds in progress */
struct list_head requeue; /* tasks needing another run */
struct work_struct xmitwork; /* per-conn. xmit workqueue */
unsigned long suspend_tx; /* suspend Tx */
unsigned long suspend_rx; /* suspend Rx */
@ -163,8 +165,8 @@ struct iscsi_conn {
/* abort */
wait_queue_head_t ehwait; /* used in eh_abort() */
struct iscsi_tm tmhdr;
struct timer_list tmabort_timer;
int tmabort_state; /* see TMABORT_INITIAL, etc.*/
struct timer_list tmf_timer;
int tmf_state; /* see TMF_INITIAL, etc.*/
/* negotiated params */
unsigned max_recv_dlength; /* initiator_max_recv_dsl*/
@ -231,6 +233,7 @@ struct iscsi_session {
int pdu_inorder_en;
int dataseq_inorder_en;
int erl;
int fast_abort;
int tpgt;
char *username;
char *username_in;
@ -268,6 +271,7 @@ struct iscsi_session {
extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
extern int iscsi_eh_abort(struct scsi_cmnd *sc);
extern int iscsi_eh_host_reset(struct scsi_cmnd *sc);
extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
extern int iscsi_queuecommand(struct scsi_cmnd *sc,
void (*done)(struct scsi_cmnd *));
@ -326,6 +330,7 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
char *, int);
extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *,
uint32_t *);
extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask);
/*
* generic helpers