X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fscsi%2Fscsi_transport_iscsi.h;h=d5c218ddc527c457d58e410b52f71f4e189569f5;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=b41cf077e54b7c327e07d8675036ae707bb2314f;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index b41cf077e..d5c218ddc 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -2,7 +2,7 @@
  * iSCSI transport class definitions
  *
  * Copyright (C) IBM Corporation, 2004
- * Copyright (C) Mike Christie, 2004 - 2005
+ * Copyright (C) Mike Christie, 2004 - 2006
  * Copyright (C) Dmitry Yusupov, 2004 - 2005
  * Copyright (C) Alex Aizman, 2004 - 2005
  *
@@ -27,9 +27,13 @@
 #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 sockaddr;
 
 /**
  * struct iscsi_transport - iSCSI Transport template
@@ -42,10 +46,31 @@ struct iscsi_cls_conn;
  * @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
+ * @set_param:		set iSCSI parameter. Return 0 on success, -ENODATA
+ *			when param is not supported, and a -Exx value on other
+ *			error.
+ * @get_param		get iSCSI parameter. Must return number of bytes
+ *			copied to buffer on success, -ENODATA when param
+ *			is not supported, and a -Exx value on other error
  * @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
+ * @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
  */
@@ -53,38 +78,54 @@ 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 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 scsi_transport_template *t, uint32_t sn, uint32_t *sid);
+	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,
-			  uint32_t transport_fd, int is_leading);
+			  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);
+			  char *buf, int buflen);
 	int (*get_conn_param) (struct iscsi_cls_conn *conn,
-			       enum iscsi_param param,
-			       uint32_t *value);
+			       enum iscsi_param param, char *buf);
 	int (*get_session_param) (struct iscsi_cls_session *session,
-				  enum iscsi_param param, uint32_t *value);
+				  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 (*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);
+	int (*tgt_dscvr) (enum iscsi_tgt_dscvr type, uint32_t host_no,
+			  uint32_t enable, struct sockaddr *dst_addr);
 };
 
 /*
@@ -100,23 +141,47 @@ extern void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error);
 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 */
+
 	int active;			/* must be accessed with the connlock */
 	struct device dev;		/* sysfs transport/container device */
-	struct mempool_zone *z_error;
-	struct mempool_zone *z_pdu;
-	struct list_head freequeue;
 };
 
 #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;
+
+	/* recovery fields */
+	int recovery_tmo;
+	struct delayed_work recovery_work;
+
+	int target_id;
+
+	int sid;				/* session id */
+	void *dd_data;				/* LLD private data */
 	struct device dev;	/* sysfs transport/container device */
 };
 
@@ -126,22 +191,34 @@ struct iscsi_cls_session {
 #define iscsi_session_to_shost(_session) \
 	dev_to_shost(_session->dev.parent)
 
+#define starget_to_session(_stgt) \
+	iscsi_dev_to_session(_stgt->dev.parent)
+
+struct iscsi_host {
+	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_alloc_session(struct Scsi_Host *shost,
+					struct iscsi_transport *transport);
+extern int iscsi_add_session(struct iscsi_cls_session *session,
+			     unsigned int target_id);
+extern int iscsi_if_create_session_done(struct iscsi_cls_conn *conn);
+extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn);
 extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
-				struct iscsi_transport *t);
+						struct iscsi_transport *t,
+						unsigned int target_id);
+extern void iscsi_remove_session(struct iscsi_cls_session *session);
+extern void iscsi_free_session(struct iscsi_cls_session *session);
 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