diff options
Diffstat (limited to 'include/scsi/scsi_transport_iscsi.h')
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 119 |
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 |