* iSCSI transport class definitions
*
* Copyright (C) IBM Corporation, 2004
- * Copyright (C) Mike Christie, 2004 - 2006
+ * Copyright (C) Mike Christie, 2004 - 2005
* Copyright (C) Dmitry Yusupov, 2004 - 2005
* Copyright (C) Alex Aizman, 2004 - 2005
*
#include <scsi/iscsi_if.h>
struct scsi_transport_template;
-struct iscsi_transport;
struct Scsi_Host;
struct mempool_zone;
struct iscsi_cls_conn;
-struct iscsi_conn;
-struct iscsi_cmd_task;
-struct iscsi_mgmt_task;
/**
* struct iscsi_transport - iSCSI Transport template
* @start_conn: set connection to be operational
* @stop_conn: suspend/recover/terminate connection
* @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
- * @session_recovery_timedout: notify LLD a block during recovery timed out
- * @suspend_conn_recv: susepend the recv side of the connection
- * @termincate_conn: destroy socket connection. Called with mutex lock.
- * @init_cmd_task: Initialize a iscsi_cmd_task and any internal structs.
- * Called from queuecommand with session lock held.
- * @init_mgmt_task: Initialize a iscsi_mgmt_task and any internal structs.
- * Called from iscsi_conn_send_generic with xmitmutex.
- * @xmit_cmd_task: Requests LLD to transfer cmd task. Returns 0 or the
- * the number of bytes transferred on success, and -Exyz
- * value on error.
- * @xmit_mgmt_task: Requests LLD to transfer mgmt task. Returns 0 or the
- * the number of bytes transferred on success, and -Exyz
- * value on error.
- * @cleanup_cmd_task: requests LLD to fail cmd task. Called with xmitmutex
- * and session->lock after the connection has been
- * suspended and terminated during recovery. If called
- * from abort task then connection is not suspended
- * or terminated but sk_callback_lock is held
*
* Template API provided by iSCSI Transport
*/
struct module *owner;
char *name;
unsigned int caps;
- /* LLD sets this to indicate what values it can export to sysfs */
- unsigned int param_mask;
struct scsi_host_template *host_template;
+ /* LLD session/scsi_host data size */
+ int hostdata_size;
+ /* LLD iscsi_host data size */
+ int ihostdata_size;
/* LLD connection data size */
int conndata_size;
- /* LLD session data size */
- int sessiondata_size;
int max_lun;
unsigned int max_conn;
unsigned int max_cmd_len;
- struct iscsi_cls_session *(*create_session) (struct iscsi_transport *it,
- struct scsi_transport_template *t, uint32_t sn, uint32_t *hn);
+ struct iscsi_cls_session *(*create_session)
+ (struct scsi_transport_template *t, uint32_t sn, uint32_t *sid);
void (*destroy_session) (struct iscsi_cls_session *session);
struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess,
uint32_t cid);
int (*bind_conn) (struct iscsi_cls_session *session,
struct iscsi_cls_conn *cls_conn,
- uint64_t transport_eph, int is_leading);
+ uint32_t transport_fd, int is_leading);
int (*start_conn) (struct iscsi_cls_conn *conn);
void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
void (*destroy_conn) (struct iscsi_cls_conn *conn);
int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
uint32_t value);
int (*get_conn_param) (struct iscsi_cls_conn *conn,
- enum iscsi_param param, uint32_t *value);
+ enum iscsi_param param,
+ uint32_t *value);
int (*get_session_param) (struct iscsi_cls_session *session,
enum iscsi_param param, uint32_t *value);
- int (*get_conn_str_param) (struct iscsi_cls_conn *conn,
- enum iscsi_param param, char *buf);
- int (*get_session_str_param) (struct iscsi_cls_session *session,
- enum iscsi_param param, char *buf);
int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,
struct iscsi_stats *stats);
- void (*suspend_conn_recv) (struct iscsi_conn *conn);
- void (*terminate_conn) (struct iscsi_conn *conn);
- void (*init_cmd_task) (struct iscsi_cmd_task *ctask);
- void (*init_mgmt_task) (struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask,
- char *data, uint32_t data_size);
- int (*xmit_cmd_task) (struct iscsi_conn *conn,
- struct iscsi_cmd_task *ctask);
- void (*cleanup_cmd_task) (struct iscsi_conn *conn,
- struct iscsi_cmd_task *ctask);
- int (*xmit_mgmt_task) (struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask);
- void (*session_recovery_timedout) (struct iscsi_cls_session *session);
- int (*ep_connect) (struct sockaddr *dst_addr, int non_blocking,
- uint64_t *ep_handle);
- int (*ep_poll) (uint64_t ep_handle, int timeout_ms);
- void (*ep_disconnect) (uint64_t ep_handle);
};
/*
extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
-
-/* Connection's states */
-#define ISCSI_CONN_INITIAL_STAGE 0
-#define ISCSI_CONN_STARTED 1
-#define ISCSI_CONN_STOPPED 2
-#define ISCSI_CONN_CLEANUP_WAIT 3
-
struct iscsi_cls_conn {
struct list_head conn_list; /* item in connlist */
void *dd_data; /* LLD private data */
struct iscsi_transport *transport;
- uint32_t cid; /* connection id */
-
- /* portal/group values we got during discovery */
- char *persistent_address;
- int persistent_port;
- /* portal/group values we are currently using */
- char *address;
- int port;
-
int active; /* must be accessed with the connlock */
struct device dev; /* sysfs transport/container device */
struct mempool_zone *z_error;
#define iscsi_dev_to_conn(_dev) \
container_of(_dev, struct iscsi_cls_conn, dev)
-/* Session's states */
-#define ISCSI_STATE_FREE 1
-#define ISCSI_STATE_LOGGED_IN 2
-#define ISCSI_STATE_FAILED 3
-#define ISCSI_STATE_TERMINATE 4
-#define ISCSI_STATE_IN_RECOVERY 5
-#define ISCSI_STATE_RECOVERY_FAILED 6
-
struct iscsi_cls_session {
struct list_head sess_list; /* item in session_list */
- struct list_head host_list;
struct iscsi_transport *transport;
-
- /* iSCSI values used as unique id by userspace. */
- char *targetname;
- int tpgt;
-
- /* recovery fields */
- int recovery_tmo;
- struct work_struct recovery_work;
-
- int target_id;
- int channel;
-
- int sid; /* session id */
- void *dd_data; /* LLD private data */
struct device dev; /* sysfs transport/container device */
};
#define iscsi_session_to_shost(_session) \
dev_to_shost(_session->dev.parent)
-struct iscsi_host {
- int next_target_id;
- struct list_head sessions;
- struct mutex mutex;
-};
-
/*
* session and connection functions that can be used by HW iSCSI LLDs
*/
extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
- struct iscsi_transport *t, int channel);
+ struct iscsi_transport *t);
extern int iscsi_destroy_session(struct iscsi_cls_session *session);
extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
uint32_t cid);
extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
-extern void iscsi_unblock_session(struct iscsi_cls_session *session);
-extern void iscsi_block_session(struct iscsi_cls_session *session);
+
+/*
+ * session functions used by software iscsi
+ */
+extern struct Scsi_Host *
+iscsi_transport_create_session(struct scsi_transport_template *scsit,
+ struct iscsi_transport *transport);
+extern int iscsi_transport_destroy_session(struct Scsi_Host *shost);
#endif
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