diff options
Diffstat (limited to 'include/scsi/scsi_transport_iscsi.h')
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 394 |
1 files changed, 326 insertions, 68 deletions
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 39e833260bd..2555ee5343f 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -24,17 +24,23 @@ #define SCSI_TRANSPORT_ISCSI_H #include <linux/device.h> +#include <linux/list.h> +#include <linux/mutex.h> #include <scsi/iscsi_if.h> struct scsi_transport_template; struct iscsi_transport; +struct iscsi_endpoint; struct Scsi_Host; -struct mempool_zone; +struct scsi_cmnd; struct iscsi_cls_conn; struct iscsi_conn; -struct iscsi_cmd_task; -struct iscsi_mgmt_task; +struct iscsi_task; struct sockaddr; +struct iscsi_iface; +struct bsg_job; +struct iscsi_bus_flash_session; +struct iscsi_bus_flash_conn; /** * struct iscsi_transport - iSCSI Transport template @@ -57,19 +63,22 @@ 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 * @@ -79,18 +88,10 @@ 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 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 iscsi_transport *it, - struct scsi_transport_template *t, uint32_t sn, uint32_t *hn); + + struct iscsi_cls_session *(*create_session) (struct iscsi_endpoint *ep, + uint16_t cmds_max, uint16_t qdepth, + uint32_t sn); void (*destroy_session) (struct iscsi_cls_session *session); struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess, uint32_t cid); @@ -102,31 +103,71 @@ struct iscsi_transport { void (*destroy_conn) (struct iscsi_cls_conn *conn); int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param, char *buf, int buflen); + int (*get_ep_param) (struct iscsi_endpoint *ep, enum iscsi_param param, + char *buf); int (*get_conn_param) (struct iscsi_cls_conn *conn, enum iscsi_param param, char *buf); int (*get_session_param) (struct iscsi_cls_session *session, enum iscsi_param param, char *buf); + int (*get_host_param) (struct Scsi_Host *shost, + enum iscsi_host_param param, char *buf); + int (*set_host_param) (struct Scsi_Host *shost, + enum iscsi_host_param param, char *buf, + int buflen); 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); + + int (*init_task) (struct iscsi_task *task); + int (*xmit_task) (struct iscsi_task *task); + void (*cleanup_task) (struct iscsi_task *task); + + int (*alloc_pdu) (struct iscsi_task *task, uint8_t opcode); + int (*xmit_pdu) (struct iscsi_task *task); + int (*init_pdu) (struct iscsi_task *task, unsigned int offset, + unsigned int count); + void (*parse_pdu_itt) (struct iscsi_conn *conn, itt_t itt, + int *index, int *age); + 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, + struct iscsi_endpoint *(*ep_connect) (struct Scsi_Host *shost, + 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); + int (*set_path) (struct Scsi_Host *shost, struct iscsi_path *params); + int (*set_iface_param) (struct Scsi_Host *shost, void *data, + uint32_t len); + int (*get_iface_param) (struct iscsi_iface *iface, + enum iscsi_param_type param_type, + int param, char *buf); + umode_t (*attr_is_visible)(int param_type, int param); + int (*bsg_request)(struct bsg_job *job); + int (*send_ping) (struct Scsi_Host *shost, uint32_t iface_num, + uint32_t iface_type, uint32_t payload_size, + uint32_t pid, struct sockaddr *dst_addr); + int (*get_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx, + uint32_t *num_entries, char *buf); + int (*delete_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx); + int (*set_chap) (struct Scsi_Host *shost, void *data, int len); + int (*get_flashnode_param) (struct iscsi_bus_flash_session *fnode_sess, + int param, char *buf); + int (*set_flashnode_param) (struct iscsi_bus_flash_session *fnode_sess, + struct iscsi_bus_flash_conn *fnode_conn, + void *data, int len); + int (*new_flashnode) (struct Scsi_Host *shost, const char *buf, + int len); + int (*del_flashnode) (struct iscsi_bus_flash_session *fnode_sess); + int (*login_flashnode) (struct iscsi_bus_flash_session *fnode_sess, + struct iscsi_bus_flash_conn *fnode_conn); + int (*logout_flashnode) (struct iscsi_bus_flash_session *fnode_sess, + struct iscsi_bus_flash_conn *fnode_conn); + int (*logout_flashnode_sid) (struct iscsi_cls_session *cls_sess); + int (*get_host_stats) (struct Scsi_Host *shost, char *buf, int len); + u8 (*check_protection)(struct iscsi_task *task, sector_t *sector); }; /* @@ -138,52 +179,79 @@ extern int iscsi_unregister_transport(struct iscsi_transport *tt); /* * control plane upcalls */ -extern void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error); +extern void iscsi_conn_error_event(struct iscsi_cls_conn *conn, + enum iscsi_err error); +extern void iscsi_conn_login_event(struct iscsi_cls_conn *conn, + enum iscsi_conn_state state); extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, char *data, uint32_t data_size); +extern int iscsi_offload_mesg(struct Scsi_Host *shost, + struct iscsi_transport *transport, uint32_t type, + char *data, uint16_t data_size); + +extern void iscsi_post_host_event(uint32_t host_no, + struct iscsi_transport *transport, + enum iscsi_host_event_code code, + uint32_t data_size, + uint8_t *data); -/* 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 +extern void iscsi_ping_comp_event(uint32_t host_no, + struct iscsi_transport *transport, + uint32_t status, uint32_t pid, + uint32_t data_size, uint8_t *data); 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 */ + struct mutex ep_mutex; + struct iscsi_endpoint *ep; - 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 +#define transport_class_to_conn(_cdev) \ + iscsi_dev_to_conn(_cdev->parent) + +#define iscsi_conn_to_session(_conn) \ + iscsi_dev_to_session(_conn->dev.parent) + +/* iscsi class session state */ +enum { + ISCSI_SESSION_LOGGED_IN, + ISCSI_SESSION_FAILED, + 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; + struct work_struct unblock_work; + struct work_struct scan_work; + struct work_struct unbind_work; /* recovery fields */ int recovery_tmo; - struct work_struct recovery_work; + struct delayed_work recovery_work; - int target_id; + unsigned int target_id; + bool ida_used; + /* + * pid of userspace process that created session or -1 if + * created by the kernel. + */ + pid_t creator; + int state; int sid; /* session id */ void *dd_data; /* LLD private data */ struct device dev; /* sysfs transport/container device */ @@ -192,37 +260,227 @@ struct iscsi_cls_session { #define iscsi_dev_to_session(_dev) \ container_of(_dev, struct iscsi_cls_session, dev) +#define transport_class_to_session(_cdev) \ + iscsi_dev_to_session(_cdev->parent) + #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 iscsi_cls_host { + atomic_t nr_scans; struct mutex mutex; + struct request_queue *bsg_q; + uint32_t port_speed; + uint32_t port_state; +}; + +#define iscsi_job_to_shost(_job) \ + dev_to_shost(_job->dev) + +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; + uint64_t id; + struct iscsi_cls_conn *conn; +}; + +struct iscsi_iface { + struct device dev; + struct iscsi_transport *transport; + uint32_t iface_type; /* IPv4 or IPv6 */ + uint32_t iface_num; /* iface number, 0 - n */ + void *dd_data; /* LLD private data */ +}; + +#define iscsi_dev_to_iface(_dev) \ + container_of(_dev, struct iscsi_iface, dev) + +#define iscsi_iface_to_shost(_iface) \ + dev_to_shost(_iface->dev.parent) + + +struct iscsi_bus_flash_conn { + struct list_head conn_list; /* item in connlist */ + void *dd_data; /* LLD private data */ + struct iscsi_transport *transport; + struct device dev; /* sysfs transport/container device */ + /* iscsi connection parameters */ + uint32_t exp_statsn; + uint32_t statsn; + unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ + unsigned max_xmit_dlength; /* target_max_recv_dsl */ + unsigned max_segment_size; + unsigned tcp_xmit_wsf; + unsigned tcp_recv_wsf; + int hdrdgst_en; + int datadgst_en; + int port; + char *ipaddress; + char *link_local_ipv6_addr; + char *redirect_ipaddr; + uint16_t keepalive_timeout; + uint16_t local_port; + uint8_t snack_req_en; + /* tcp timestamp negotiation status */ + uint8_t tcp_timestamp_stat; + uint8_t tcp_nagle_disable; + /* tcp window scale factor */ + uint8_t tcp_wsf_disable; + uint8_t tcp_timer_scale; + uint8_t tcp_timestamp_en; + uint8_t ipv4_tos; + uint8_t ipv6_traffic_class; + uint8_t ipv6_flow_label; + uint8_t fragment_disable; + /* Link local IPv6 address is assigned by firmware or driver */ + uint8_t is_fw_assigned_ipv6; }; +#define iscsi_dev_to_flash_conn(_dev) \ + container_of(_dev, struct iscsi_bus_flash_conn, dev) + +#define iscsi_flash_conn_to_flash_session(_conn) \ + iscsi_dev_to_flash_session(_conn->dev.parent) + +#define ISID_SIZE 6 + +struct iscsi_bus_flash_session { + struct list_head sess_list; /* item in session_list */ + struct iscsi_transport *transport; + unsigned int target_id; + int flash_state; /* persistent or non-persistent */ + void *dd_data; /* LLD private data */ + struct device dev; /* sysfs transport/container device */ + /* iscsi session parameters */ + unsigned first_burst; + unsigned max_burst; + unsigned short max_r2t; + int default_taskmgmt_timeout; + int initial_r2t_en; + int imm_data_en; + int time2wait; + int time2retain; + int pdu_inorder_en; + int dataseq_inorder_en; + int erl; + int tpgt; + char *username; + char *username_in; + char *password; + char *password_in; + char *targetname; + char *targetalias; + char *portal_type; + uint16_t tsid; + uint16_t chap_in_idx; + uint16_t chap_out_idx; + /* index of iSCSI discovery session if the entry is + * discovered by iSCSI discovery session + */ + uint16_t discovery_parent_idx; + /* indicates if discovery was done through iSNS discovery service + * or through sendTarget */ + uint16_t discovery_parent_type; + /* Firmware auto sendtarget discovery disable */ + uint8_t auto_snd_tgt_disable; + uint8_t discovery_sess; + /* indicates if this flashnode entry is enabled or disabled */ + uint8_t entry_state; + uint8_t chap_auth_en; + /* enables firmware to auto logout the discovery session on discovery + * completion + */ + uint8_t discovery_logout_en; + uint8_t bidi_chap_en; + /* makes authentication for discovery session optional */ + uint8_t discovery_auth_optional; + uint8_t isid[ISID_SIZE]; + uint8_t is_boot_target; +}; + +#define iscsi_dev_to_flash_session(_dev) \ + container_of(_dev, struct iscsi_bus_flash_session, dev) + +#define iscsi_flash_session_to_shost(_session) \ + dev_to_shost(_session->dev.parent) + /* * session and connection functions that can be used by HW iSCSI LLDs */ +#define iscsi_cls_session_printk(prefix, _cls_session, fmt, a...) \ + dev_printk(prefix, &(_cls_session)->dev, fmt, ##a) + +#define iscsi_cls_conn_printk(prefix, _cls_conn, fmt, a...) \ + dev_printk(prefix, &(_cls_conn)->dev, fmt, ##a) + +extern int iscsi_session_chkready(struct iscsi_cls_session *session); +extern int iscsi_is_session_online(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_if_create_session_done(struct iscsi_cls_conn *conn); -extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn); +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); +extern int iscsi_block_scsi_eh(struct scsi_cmnd *cmd); +extern struct iscsi_iface *iscsi_create_iface(struct Scsi_Host *shost, + struct iscsi_transport *t, + uint32_t iface_type, + uint32_t iface_num, int dd_size); +extern void iscsi_destroy_iface(struct iscsi_iface *iface); +extern struct iscsi_iface *iscsi_lookup_iface(int handle); +extern char *iscsi_get_port_speed_name(struct Scsi_Host *shost); +extern char *iscsi_get_port_state_name(struct Scsi_Host *shost); +extern int iscsi_is_session_dev(const struct device *dev); + +extern char *iscsi_get_discovery_parent_name(int parent_type); +extern struct device * +iscsi_find_flashnode(struct Scsi_Host *shost, void *data, + int (*fn)(struct device *dev, void *data)); + +extern struct iscsi_bus_flash_session * +iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, + struct iscsi_transport *transport, int dd_size); + +extern struct iscsi_bus_flash_conn * +iscsi_create_flashnode_conn(struct Scsi_Host *shost, + struct iscsi_bus_flash_session *fnode_sess, + struct iscsi_transport *transport, int dd_size); + +extern void +iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess); +extern void iscsi_destroy_all_flashnode(struct Scsi_Host *shost); +extern int iscsi_flashnode_bus_match(struct device *dev, + struct device_driver *drv); +extern struct device * +iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, + int (*fn)(struct device *dev, void *data)); +extern struct device * +iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess); +extern char * +iscsi_get_ipaddress_state_name(enum iscsi_ipaddress_state port_state); +extern char *iscsi_get_router_state_name(enum iscsi_router_state router_state); #endif |