struct scsi_transport_template;
struct iscsi_transport;
+struct iscsi_endpoint;
struct Scsi_Host;
struct iscsi_cls_conn;
struct iscsi_conn;
-struct iscsi_cmd_task;
-struct iscsi_mgmt_task;
+struct iscsi_task;
struct sockaddr;
/**
* @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
+ * @init_task: Initialize a iscsi_task and any internal structs.
+ * When offloading the data path, this is called from
+ * queuecommand with the session lock, or from the
+ * iscsi_conn_send_pdu context with the session lock.
+ * When not offloading the data path, this is called
+ * from the scsi work queue without the session lock.
+ * @xmit_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
+ * value on error. When offloading the data path, this
+ * is called from queuecommand with the session lock, or
+ * from the iscsi_conn_send_pdu context with the session
+ * lock. When not offloading the data path, this is called
+ * from the scsi work queue without the session lock.
+ * @cleanup_task: requests LLD to fail task. Called with session lock
+ * and 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
*
/* LLD sets this to indicate what values it can export to sysfs */
uint64_t param_mask;
uint64_t host_param_mask;
- /* LLD connection data size */
- int conndata_size;
- /* LLD session data size */
- int sessiondata_size;
- struct iscsi_cls_session *(*create_session) (struct Scsi_Host *shost,
+ struct iscsi_cls_session *(*create_session) (struct iscsi_endpoint *ep,
uint16_t cmds_max, uint16_t qdepth,
uint32_t sn, uint32_t *hn);
void (*destroy_session) (struct iscsi_cls_session *session);
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,
struct iscsi_stats *stats);
- int (*init_cmd_task) (struct iscsi_cmd_task *ctask);
- void (*init_mgmt_task) (struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask);
- 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);
+ int (*init_task) (struct iscsi_task *task);
+ int (*xmit_task) (struct iscsi_task *task);
+ void (*cleanup_task) (struct iscsi_conn *conn,
+ struct iscsi_task *task);
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);
+ struct iscsi_endpoint *(*ep_connect) (struct sockaddr *dst_addr,
+ int non_blocking);
+ int (*ep_poll) (struct iscsi_endpoint *ep, int timeout_ms);
+ void (*ep_disconnect) (struct iscsi_endpoint *ep);
int (*tgt_dscvr) (struct Scsi_Host *shost, enum iscsi_tgt_dscvr type,
uint32_t enable, struct sockaddr *dst_addr);
};
ISCSI_SESSION_FREE,
};
+#define ISCSI_MAX_TARGET -1
+
struct iscsi_cls_session {
struct list_head sess_list; /* item in session_list */
- struct list_head host_list;
struct iscsi_transport *transport;
spinlock_t lock;
struct work_struct block_work;
int recovery_tmo;
struct delayed_work recovery_work;
- int target_id;
+ unsigned int target_id;
int state;
int sid; /* session id */
iscsi_dev_to_session(_stgt->dev.parent)
struct iscsi_cls_host {
- struct list_head sessions;
atomic_t nr_scans;
struct mutex mutex;
struct workqueue_struct *scan_workq;
- char scan_workq_name[KOBJ_NAME_LEN];
+ char scan_workq_name[20];
};
extern void iscsi_host_for_each_session(struct Scsi_Host *shost,
void (*fn)(struct iscsi_cls_session *));
+struct iscsi_endpoint {
+ void *dd_data; /* LLD private data */
+ struct device dev;
+ unsigned int id;
+};
/*
* session and connection functions that can be used by HW iSCSI LLDs
extern int iscsi_session_chkready(struct iscsi_cls_session *session);
extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
- struct iscsi_transport *transport);
+ struct iscsi_transport *transport, int dd_size);
extern int iscsi_add_session(struct iscsi_cls_session *session,
unsigned int target_id);
extern int iscsi_session_event(struct iscsi_cls_session *session,
enum iscsi_uevent_e event);
extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
struct iscsi_transport *t,
+ int dd_size,
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);
+ int dd_size, 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);
extern int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time);
+extern struct iscsi_endpoint *iscsi_create_endpoint(int dd_size);
+extern void iscsi_destroy_endpoint(struct iscsi_endpoint *ep);
+extern struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle);
#endif
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