-struct iscsi_class_session {
- uint8_t isid[6];
- uint16_t tsih;
- int header_digest; /* 1 CRC32, 0 None */
- int data_digest; /* 1 CRC32, 0 None */
- uint16_t tpgt;
- union {
- struct in6_addr sin6_addr;
- struct in_addr sin_addr;
- } u;
- sa_family_t addr_type; /* must be AF_INET or AF_INET6 */
- uint16_t port; /* must be in network byte order */
- int initial_r2t; /* 1 Yes, 0 No */
- int immediate_data; /* 1 Yes, 0 No */
- uint32_t max_recv_data_segment_len;
- uint32_t max_burst_len;
- uint32_t first_burst_len;
- uint16_t def_time2wait;
- uint16_t def_time2retain;
- uint16_t max_outstanding_r2t;
- int data_pdu_in_order; /* 1 Yes, 0 No */
- int data_sequence_in_order; /* 1 Yes, 0 No */
- int erl;
+/**
+ * struct iscsi_transport - iSCSI Transport template
+ *
+ * @name: transport name
+ * @caps: iSCSI Data-Path capabilities
+ * @create_session: create new iSCSI session object
+ * @destroy_session: destroy existing iSCSI session object
+ * @create_conn: create new iSCSI connection
+ * @bind_conn: associate this connection with existing iSCSI session
+ * and specified transport descriptor
+ * @destroy_conn: destroy inactive iSCSI connection
+ * @set_param: set iSCSI Data-Path operational parameter
+ * @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 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 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);
+ 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);
+ 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);
+ 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);