1 files changed, 100 insertions, 19 deletions

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index b41cf077e54..b684426a590 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 iscsi_transport - iSCSI Transport template
@@ -46,6 +50,24 @@ struct iscsi_cls_conn;
  * @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
  */
@@ -53,38 +75,58 @@ 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);
         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);
 };
 
 /*
@@ -100,10 +142,26 @@ 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 */
+
+        /* 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;
@@ -114,9 +172,32 @@ struct iscsi_cls_conn {
 #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 */
 };
 
@@ -126,22 +207,22 @@ struct iscsi_cls_session {
 #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);
+                                struct iscsi_transport *t, int channel);
 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);
-
-/*
- * 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);
+extern void iscsi_unblock_session(struct iscsi_cls_session *session);
+extern void iscsi_block_session(struct iscsi_cls_session *session);
 
 #endif