#include <linux/workqueue.h>
#include <scsi/iscsi_proto.h>
#include <scsi/iscsi_if.h>
+#include <scsi/scsi_transport_iscsi.h>
struct scsi_transport_template;
+struct scsi_host_template;
struct scsi_device;
struct Scsi_Host;
struct scsi_cmnd;
struct iscsi_cls_conn;
struct iscsi_session;
struct iscsi_nopin;
+struct device;
/* #define DEBUG_SCSI */
#ifdef DEBUG_SCSI
#endif
#define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */
-#define ISCSI_MGMT_CMDS_MAX 16 /* must be power of 2 */
-
-#define ISCSI_MGMT_ITT_OFFSET 0xa00
+#define ISCSI_MGMT_CMDS_MAX 15
#define ISCSI_DEF_CMD_PER_LUN 32
#define ISCSI_MAX_CMD_PER_LUN 128
/* Connection suspend "bit" */
#define ISCSI_SUSPEND_BIT 1
-#define ISCSI_ITT_MASK (0xfff)
+#define ISCSI_ITT_MASK 0x1fff
+#define ISCSI_TOTAL_CMDS_MAX 4096
+/* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */
+#define ISCSI_TOTAL_CMDS_MIN 16
#define ISCSI_AGE_SHIFT 28
-#define ISCSI_AGE_MASK (0xf << ISCSI_AGE_SHIFT)
+#define ISCSI_AGE_MASK 0xf
#define ISCSI_ADDRESS_BUF_LEN 64
ISCSI_DIGEST_SIZE = sizeof(__u32),
};
-struct iscsi_mgmt_task {
- /*
- * Becuae LLDs allocate their hdr differently, this is a pointer to
- * that storage. It must be setup at session creation time.
- */
- struct iscsi_hdr *hdr;
- char *data; /* mgmt payload */
- unsigned data_count; /* counts data to be sent */
- uint32_t itt; /* this ITT */
- void *dd_data; /* driver/transport data */
- struct list_head running;
-};
enum {
ISCSI_TASK_COMPLETED,
ISCSI_TASK_RUNNING,
};
-struct iscsi_cmd_task {
+struct iscsi_r2t_info {
+ __be32 ttt; /* copied from R2T */
+ __be32 exp_statsn; /* copied from R2T */
+ uint32_t data_length; /* copied from R2T */
+ uint32_t data_offset; /* copied from R2T */
+ int data_count; /* DATA-Out payload progress */
+ int datasn;
+ /* LLDs should set/update these values */
+ int sent; /* R2T sequence progress */
+};
+
+struct iscsi_task {
/*
* Because LLDs allocate their hdr differently, this is a pointer
* and length to that storage. It must be setup at session
* creation time.
*/
- struct iscsi_cmd *hdr;
+ struct iscsi_hdr *hdr;
unsigned short hdr_max;
unsigned short hdr_len; /* accumulated size of hdr used */
+ /* copied values in case we need to send tmfs */
+ itt_t hdr_itt;
+ __be32 cmdsn;
+ uint8_t lun[8];
+
int itt; /* this ITT */
- uint32_t unsol_datasn;
unsigned imm_count; /* imm-data (bytes) */
- unsigned unsol_count; /* unsolicited (bytes)*/
/* offset in unsolicited stream (bytes); */
- unsigned unsol_offset;
- unsigned data_count; /* remaining Data-Out */
+ struct iscsi_r2t_info unsol_r2t;
+ char *data; /* mgmt payload */
+ unsigned data_count;
struct scsi_cmnd *sc; /* associated SCSI cmd*/
struct iscsi_conn *conn; /* used connection */
void *dd_data; /* driver/transport data */
};
-static inline void* iscsi_next_hdr(struct iscsi_cmd_task *ctask)
+static inline int iscsi_task_has_unsol_data(struct iscsi_task *task)
{
- return (void*)ctask->hdr + ctask->hdr_len;
+ return task->unsol_r2t.data_length > task->unsol_r2t.sent;
+}
+
+static inline void* iscsi_next_hdr(struct iscsi_task *task)
+{
+ return (void*)task->hdr + task->hdr_len;
}
/* Connection's states */
void *dd_data; /* iscsi_transport data */
struct iscsi_session *session; /* parent session */
/*
- * LLDs should set this lock. It protects the transport recv
- * code
- */
- rwlock_t *recv_lock;
- /*
* conn_stop() flag: stop to recover, stop to terminate
*/
int stop_stage;
unsigned long last_ping;
int ping_timeout;
int recv_timeout;
- struct iscsi_mgmt_task *ping_mtask;
+ struct iscsi_task *ping_task;
/* iSCSI connection-wide sequencing */
uint32_t exp_statsn;
* should always fit in this buffer
*/
char *data;
- struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
- struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
- struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
+ struct iscsi_task *login_task; /* mtask used for login/text */
+ struct iscsi_task *task; /* xmit task in progress */
/* xmit */
struct list_head mgmtqueue; /* mgmt (control) xmit queue */
char *password;
char *password_in;
char *targetname;
+ char *ifacename;
+ char *initiatorname;
/* control data */
struct iscsi_transport *tt;
struct Scsi_Host *host;
int state; /* session state */
int age; /* counts session re-opens */
+ int scsi_cmds_max; /* max scsi commands */
int cmds_max; /* size of cmds array */
- struct iscsi_cmd_task **cmds; /* Original Cmds arr */
+ struct iscsi_task **cmds; /* Original Cmds arr */
struct iscsi_pool cmdpool; /* PDU's pool */
- int mgmtpool_max; /* size of mgmt array */
- struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
- struct iscsi_pool mgmtpool; /* Mgmt PDU's pool */
+};
+
+enum {
+ ISCSI_HOST_SETUP,
+ ISCSI_HOST_REMOVED,
};
struct iscsi_host {
/* local address */
int local_port;
char local_address[ISCSI_ADDRESS_BUF_LEN];
+
+ wait_queue_head_t session_removal_wq;
+ /* protects sessions and state */
+ spinlock_t lock;
+ int num_sessions;
+ int state;
};
/*
*/
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_target_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 *));
-
/*
* iSCSI host helpers.
*/
+#define iscsi_host_priv(_shost) \
+ (shost_priv(_shost) + sizeof(struct iscsi_host))
+
extern int iscsi_host_set_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf,
int buflen);
extern int iscsi_host_get_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf);
-extern void iscsi_host_setup(struct Scsi_Host *shost, uint16_t qdepth);
-extern void iscsi_host_teardown(struct Scsi_Host *shost);
+extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev);
+extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
+ int dd_data_size, uint16_t qdepth);
+extern void iscsi_host_remove(struct Scsi_Host *shost);
+extern void iscsi_host_free(struct Scsi_Host *shost);
/*
* session management
*/
extern struct iscsi_cls_session *
iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost,
- uint16_t, int, int, uint32_t);
+ uint16_t, int, uint32_t, unsigned int);
extern void iscsi_session_teardown(struct iscsi_cls_session *);
extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
* connection management
*/
extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
- uint32_t);
+ int, uint32_t);
extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
extern int iscsi_conn_start(struct iscsi_cls_conn *);
extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
int);
extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
+extern void iscsi_session_failure(struct iscsi_cls_session *cls_session,
+ enum iscsi_err err);
extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf);
+extern void iscsi_suspend_tx(struct iscsi_conn *conn);
#define iscsi_conn_printk(prefix, _c, fmt, a...) \
- iscsi_cls_conn_printk(prefix, _c->cls_conn, fmt, ##a)
+ iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \
+ fmt, ##a)
/*
* pdu and task processing
*/
extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *);
-extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *,
- struct iscsi_data *hdr);
+extern void iscsi_prep_data_out_pdu(struct iscsi_task *task,
+ struct iscsi_r2t_info *r2t,
+ struct iscsi_data *hdr);
extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
char *, uint32_t);
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);
-extern void iscsi_free_mgmt_task(struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask);
+extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
+ char *, int);
+extern int iscsi_verify_itt(struct iscsi_conn *, itt_t);
+extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t);
+extern void iscsi_requeue_task(struct iscsi_task *task);
+extern void iscsi_put_task(struct iscsi_task *task);
+extern void __iscsi_get_task(struct iscsi_task *task);
/*
* generic helpers
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