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-rw-r--r--include/scsi/scsi_transport_iscsi.h75
1 files changed, 67 insertions, 8 deletions
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index f25041c386ec..16602a547a63 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -23,8 +23,14 @@
#ifndef SCSI_TRANSPORT_ISCSI_H
#define SCSI_TRANSPORT_ISCSI_H
+#include <linux/device.h>
#include <scsi/iscsi_if.h>
+struct scsi_transport_template;
+struct Scsi_Host;
+struct mempool_zone;
+struct iscsi_cls_conn;
+
/**
* struct iscsi_transport - iSCSI Transport template
*
@@ -48,23 +54,31 @@ struct iscsi_transport {
char *name;
unsigned int caps;
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;
int max_lun;
unsigned int max_conn;
unsigned int max_cmd_len;
- iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
- struct Scsi_Host *shost);
- void (*destroy_session) (iscsi_sessionh_t session);
- iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
+ struct Scsi_Host *(*create_session) (struct scsi_transport_template *t,
+ uint32_t initial_cmdsn);
+ void (*destroy_session) (struct Scsi_Host *shost);
+ struct iscsi_cls_conn *(*create_conn) (struct Scsi_Host *shost,
+ uint32_t cid);
int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
uint32_t transport_fd, int is_leading);
int (*start_conn) (iscsi_connh_t conn);
void (*stop_conn) (iscsi_connh_t conn, int flag);
- void (*destroy_conn) (iscsi_connh_t conn);
+ void (*destroy_conn) (struct iscsi_cls_conn *conn);
int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
uint32_t value);
- int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
- uint32_t *value);
+ int (*get_conn_param) (void *conndata, enum iscsi_param param,
+ uint32_t *value);
+ int (*get_session_param) (struct Scsi_Host *shost,
+ enum iscsi_param param, uint32_t *value);
int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
@@ -73,7 +87,7 @@ struct iscsi_transport {
/*
* transport registration upcalls
*/
-extern int iscsi_register_transport(struct iscsi_transport *tt);
+extern struct scsi_transport_template *iscsi_register_transport(struct iscsi_transport *tt);
extern int iscsi_unregister_transport(struct iscsi_transport *tt);
/*
@@ -83,4 +97,49 @@ extern void iscsi_conn_error(iscsi_connh_t conn, enum iscsi_err error);
extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
+struct iscsi_cls_conn {
+ struct list_head conn_list; /* item in connlist */
+ void *dd_data; /* LLD private data */
+ struct iscsi_transport *transport;
+ iscsi_connh_t connh;
+ 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)
+
+struct iscsi_cls_session {
+ struct list_head list; /* item in session_list */
+ struct iscsi_transport *transport;
+ struct device dev; /* sysfs transport/container device */
+};
+
+#define iscsi_dev_to_session(_dev) \
+ container_of(_dev, struct iscsi_cls_session, dev)
+
+#define iscsi_session_to_shost(_session) \
+ dev_to_shost(_session->dev.parent)
+
+/*
+ * 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);
+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);
+
#endif