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23#ifndef SCSI_TRANSPORT_ISCSI_H
24#define SCSI_TRANSPORT_ISCSI_H
25
26#include <linux/device.h>
27#include <linux/list.h>
28#include <linux/mutex.h>
29#include <scsi/iscsi_if.h>
30
31struct scsi_transport_template;
32struct iscsi_transport;
33struct iscsi_endpoint;
34struct Scsi_Host;
35struct scsi_cmnd;
36struct iscsi_cls_conn;
37struct iscsi_conn;
38struct iscsi_task;
39struct sockaddr;
40struct iscsi_iface;
41struct bsg_job;
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85struct iscsi_transport {
86 struct module *owner;
87 char *name;
88 unsigned int caps;
89
90 struct iscsi_cls_session *(*create_session) (struct iscsi_endpoint *ep,
91 uint16_t cmds_max, uint16_t qdepth,
92 uint32_t sn);
93 void (*destroy_session) (struct iscsi_cls_session *session);
94 struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess,
95 uint32_t cid);
96 int (*bind_conn) (struct iscsi_cls_session *session,
97 struct iscsi_cls_conn *cls_conn,
98 uint64_t transport_eph, int is_leading);
99 int (*start_conn) (struct iscsi_cls_conn *conn);
100 void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
101 void (*destroy_conn) (struct iscsi_cls_conn *conn);
102 int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
103 char *buf, int buflen);
104 int (*get_ep_param) (struct iscsi_endpoint *ep, enum iscsi_param param,
105 char *buf);
106 int (*get_conn_param) (struct iscsi_cls_conn *conn,
107 enum iscsi_param param, char *buf);
108 int (*get_session_param) (struct iscsi_cls_session *session,
109 enum iscsi_param param, char *buf);
110 int (*get_host_param) (struct Scsi_Host *shost,
111 enum iscsi_host_param param, char *buf);
112 int (*set_host_param) (struct Scsi_Host *shost,
113 enum iscsi_host_param param, char *buf,
114 int buflen);
115 int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
116 char *data, uint32_t data_size);
117 void (*get_stats) (struct iscsi_cls_conn *conn,
118 struct iscsi_stats *stats);
119
120 int (*init_task) (struct iscsi_task *task);
121 int (*xmit_task) (struct iscsi_task *task);
122 void (*cleanup_task) (struct iscsi_task *task);
123
124 int (*alloc_pdu) (struct iscsi_task *task, uint8_t opcode);
125 int (*xmit_pdu) (struct iscsi_task *task);
126 int (*init_pdu) (struct iscsi_task *task, unsigned int offset,
127 unsigned int count);
128 void (*parse_pdu_itt) (struct iscsi_conn *conn, itt_t itt,
129 int *index, int *age);
130
131 void (*session_recovery_timedout) (struct iscsi_cls_session *session);
132 struct iscsi_endpoint *(*ep_connect) (struct Scsi_Host *shost,
133 struct sockaddr *dst_addr,
134 int non_blocking);
135 int (*ep_poll) (struct iscsi_endpoint *ep, int timeout_ms);
136 void (*ep_disconnect) (struct iscsi_endpoint *ep);
137 int (*tgt_dscvr) (struct Scsi_Host *shost, enum iscsi_tgt_dscvr type,
138 uint32_t enable, struct sockaddr *dst_addr);
139 int (*set_path) (struct Scsi_Host *shost, struct iscsi_path *params);
140 int (*set_iface_param) (struct Scsi_Host *shost, void *data,
141 uint32_t len);
142 int (*get_iface_param) (struct iscsi_iface *iface,
143 enum iscsi_param_type param_type,
144 int param, char *buf);
145 umode_t (*attr_is_visible)(int param_type, int param);
146 int (*bsg_request)(struct bsg_job *job);
147 int (*send_ping) (struct Scsi_Host *shost, uint32_t iface_num,
148 uint32_t iface_type, uint32_t payload_size,
149 uint32_t pid, struct sockaddr *dst_addr);
150 int (*get_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx,
151 uint32_t *num_entries, char *buf);
152 int (*delete_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx);
153};
154
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157
158extern struct scsi_transport_template *iscsi_register_transport(struct iscsi_transport *tt);
159extern int iscsi_unregister_transport(struct iscsi_transport *tt);
160
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163
164extern void iscsi_conn_error_event(struct iscsi_cls_conn *conn,
165 enum iscsi_err error);
166extern void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
167 enum iscsi_conn_state state);
168extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
169 char *data, uint32_t data_size);
170
171extern int iscsi_offload_mesg(struct Scsi_Host *shost,
172 struct iscsi_transport *transport, uint32_t type,
173 char *data, uint16_t data_size);
174
175extern void iscsi_post_host_event(uint32_t host_no,
176 struct iscsi_transport *transport,
177 enum iscsi_host_event_code code,
178 uint32_t data_size,
179 uint8_t *data);
180
181extern void iscsi_ping_comp_event(uint32_t host_no,
182 struct iscsi_transport *transport,
183 uint32_t status, uint32_t pid,
184 uint32_t data_size, uint8_t *data);
185
186struct iscsi_cls_conn {
187 struct list_head conn_list;
188 void *dd_data;
189 struct iscsi_transport *transport;
190 uint32_t cid;
191 struct mutex ep_mutex;
192 struct iscsi_endpoint *ep;
193
194 struct device dev;
195};
196
197#define iscsi_dev_to_conn(_dev) \
198 container_of(_dev, struct iscsi_cls_conn, dev)
199
200#define transport_class_to_conn(_cdev) \
201 iscsi_dev_to_conn(_cdev->parent)
202
203#define iscsi_conn_to_session(_conn) \
204 iscsi_dev_to_session(_conn->dev.parent)
205
206
207enum {
208 ISCSI_SESSION_LOGGED_IN,
209 ISCSI_SESSION_FAILED,
210 ISCSI_SESSION_FREE,
211};
212
213#define ISCSI_MAX_TARGET -1
214
215struct iscsi_cls_session {
216 struct list_head sess_list;
217 struct iscsi_transport *transport;
218 spinlock_t lock;
219 struct work_struct block_work;
220 struct work_struct unblock_work;
221 struct work_struct scan_work;
222 struct work_struct unbind_work;
223
224
225 int recovery_tmo;
226 struct delayed_work recovery_work;
227
228 unsigned int target_id;
229 bool ida_used;
230
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234
235 pid_t creator;
236 int state;
237 int sid;
238 void *dd_data;
239 struct device dev;
240};
241
242#define iscsi_dev_to_session(_dev) \
243 container_of(_dev, struct iscsi_cls_session, dev)
244
245#define transport_class_to_session(_cdev) \
246 iscsi_dev_to_session(_cdev->parent)
247
248#define iscsi_session_to_shost(_session) \
249 dev_to_shost(_session->dev.parent)
250
251#define starget_to_session(_stgt) \
252 iscsi_dev_to_session(_stgt->dev.parent)
253
254struct iscsi_cls_host {
255 atomic_t nr_scans;
256 struct mutex mutex;
257 struct request_queue *bsg_q;
258 uint32_t port_speed;
259 uint32_t port_state;
260};
261
262#define iscsi_job_to_shost(_job) \
263 dev_to_shost(_job->dev)
264
265extern void iscsi_host_for_each_session(struct Scsi_Host *shost,
266 void (*fn)(struct iscsi_cls_session *));
267
268struct iscsi_endpoint {
269 void *dd_data;
270 struct device dev;
271 uint64_t id;
272 struct iscsi_cls_conn *conn;
273};
274
275struct iscsi_iface {
276 struct device dev;
277 struct iscsi_transport *transport;
278 uint32_t iface_type;
279 uint32_t iface_num;
280 void *dd_data;
281};
282
283#define iscsi_dev_to_iface(_dev) \
284 container_of(_dev, struct iscsi_iface, dev)
285
286#define iscsi_iface_to_shost(_iface) \
287 dev_to_shost(_iface->dev.parent)
288
289
290
291
292#define iscsi_cls_session_printk(prefix, _cls_session, fmt, a...) \
293 dev_printk(prefix, &(_cls_session)->dev, fmt, ##a)
294
295#define iscsi_cls_conn_printk(prefix, _cls_conn, fmt, a...) \
296 dev_printk(prefix, &(_cls_conn)->dev, fmt, ##a)
297
298extern int iscsi_session_chkready(struct iscsi_cls_session *session);
299extern int iscsi_is_session_online(struct iscsi_cls_session *session);
300extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
301 struct iscsi_transport *transport, int dd_size);
302extern int iscsi_add_session(struct iscsi_cls_session *session,
303 unsigned int target_id);
304extern int iscsi_session_event(struct iscsi_cls_session *session,
305 enum iscsi_uevent_e event);
306extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
307 struct iscsi_transport *t,
308 int dd_size,
309 unsigned int target_id);
310extern void iscsi_remove_session(struct iscsi_cls_session *session);
311extern void iscsi_free_session(struct iscsi_cls_session *session);
312extern int iscsi_destroy_session(struct iscsi_cls_session *session);
313extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
314 int dd_size, uint32_t cid);
315extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
316extern void iscsi_unblock_session(struct iscsi_cls_session *session);
317extern void iscsi_block_session(struct iscsi_cls_session *session);
318extern int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time);
319extern struct iscsi_endpoint *iscsi_create_endpoint(int dd_size);
320extern void iscsi_destroy_endpoint(struct iscsi_endpoint *ep);
321extern struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle);
322extern int iscsi_block_scsi_eh(struct scsi_cmnd *cmd);
323extern struct iscsi_iface *iscsi_create_iface(struct Scsi_Host *shost,
324 struct iscsi_transport *t,
325 uint32_t iface_type,
326 uint32_t iface_num, int dd_size);
327extern void iscsi_destroy_iface(struct iscsi_iface *iface);
328extern struct iscsi_iface *iscsi_lookup_iface(int handle);
329extern char *iscsi_get_port_speed_name(struct Scsi_Host *shost);
330extern char *iscsi_get_port_state_name(struct Scsi_Host *shost);
331extern int iscsi_is_session_dev(const struct device *dev);
332
333#endif
334