Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
7996a778 MC |
2 | /* |
3 | * iSCSI lib definitions | |
4 | * | |
5 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. | |
6 | * Copyright (C) 2004 - 2006 Mike Christie | |
7 | * Copyright (C) 2004 - 2005 Dmitry Yusupov | |
8 | * Copyright (C) 2004 - 2005 Alex Aizman | |
7996a778 MC |
9 | */ |
10 | #ifndef LIBISCSI_H | |
11 | #define LIBISCSI_H | |
12 | ||
13 | #include <linux/types.h> | |
40753caa | 14 | #include <linux/wait.h> |
7996a778 | 15 | #include <linux/mutex.h> |
f6a57033 AV |
16 | #include <linux/timer.h> |
17 | #include <linux/workqueue.h> | |
45465487 | 18 | #include <linux/kfifo.h> |
6dc618cd | 19 | #include <linux/refcount.h> |
7996a778 MC |
20 | #include <scsi/iscsi_proto.h> |
21 | #include <scsi/iscsi_if.h> | |
db22de3e | 22 | #include <scsi/scsi_cmnd.h> |
262ef636 | 23 | #include <scsi/scsi_transport_iscsi.h> |
7996a778 MC |
24 | |
25 | struct scsi_transport_template; | |
a4804cd6 | 26 | struct scsi_host_template; |
7996a778 MC |
27 | struct scsi_device; |
28 | struct Scsi_Host; | |
6b5d6c44 | 29 | struct scsi_target; |
7996a778 MC |
30 | struct scsi_cmnd; |
31 | struct socket; | |
32 | struct iscsi_transport; | |
33 | struct iscsi_cls_session; | |
34 | struct iscsi_cls_conn; | |
35 | struct iscsi_session; | |
36 | struct iscsi_nopin; | |
a4804cd6 | 37 | struct device; |
7996a778 | 38 | |
1548271e | 39 | #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */ |
3cf7b233 | 40 | #define ISCSI_MGMT_CMDS_MAX 15 |
7996a778 | 41 | |
e28f3d5b | 42 | #define ISCSI_DEF_CMD_PER_LUN 32 |
7996a778 MC |
43 | |
44 | /* Task Mgmt states */ | |
843c0a8a MC |
45 | enum { |
46 | TMF_INITIAL, | |
47 | TMF_QUEUED, | |
48 | TMF_SUCCESS, | |
49 | TMF_FAILED, | |
50 | TMF_TIMEDOUT, | |
51 | TMF_NOT_FOUND, | |
52 | }; | |
7996a778 | 53 | |
f8525eb4 AC |
54 | #define ISID_SIZE 6 |
55 | ||
5bd85625 | 56 | /* Connection flags */ |
565138ac DC |
57 | #define ISCSI_CONN_FLAG_SUSPEND_TX 0 |
58 | #define ISCSI_CONN_FLAG_SUSPEND_RX 1 | |
59 | #define ISCSI_CONN_FLAG_BOUND 2 | |
7996a778 | 60 | |
262ef636 | 61 | #define ISCSI_ITT_MASK 0x1fff |
3cf7b233 MC |
62 | #define ISCSI_TOTAL_CMDS_MAX 4096 |
63 | /* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */ | |
64 | #define ISCSI_TOTAL_CMDS_MIN 16 | |
7996a778 | 65 | #define ISCSI_AGE_SHIFT 28 |
262ef636 | 66 | #define ISCSI_AGE_MASK 0xf |
7996a778 | 67 | |
22236961 MC |
68 | #define ISCSI_ADDRESS_BUF_LEN 64 |
69 | ||
da32dd68 | 70 | enum { |
004d6530 BH |
71 | /* this is the maximum possible storage for AHSs */ |
72 | ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) + | |
73 | sizeof(struct iscsi_rlength_ahdr), | |
da32dd68 OK |
74 | ISCSI_DIGEST_SIZE = sizeof(__u32), |
75 | }; | |
76 | ||
7996a778 | 77 | |
b6c395ed | 78 | enum { |
3bbaaad9 | 79 | ISCSI_TASK_FREE, |
b6c395ed MC |
80 | ISCSI_TASK_COMPLETED, |
81 | ISCSI_TASK_PENDING, | |
82 | ISCSI_TASK_RUNNING, | |
b3cd5050 MC |
83 | ISCSI_TASK_ABRT_TMF, /* aborted due to TMF */ |
84 | ISCSI_TASK_ABRT_SESS_RECOV, /* aborted due to session recovery */ | |
f41d4721 | 85 | ISCSI_TASK_REQUEUE_SCSIQ, /* qcmd requeueing to scsi-ml */ |
b6c395ed MC |
86 | }; |
87 | ||
577577da MC |
88 | struct iscsi_r2t_info { |
89 | __be32 ttt; /* copied from R2T */ | |
90 | __be32 exp_statsn; /* copied from R2T */ | |
91 | uint32_t data_length; /* copied from R2T */ | |
92 | uint32_t data_offset; /* copied from R2T */ | |
93 | int data_count; /* DATA-Out payload progress */ | |
94 | int datasn; | |
95 | /* LLDs should set/update these values */ | |
96 | int sent; /* R2T sequence progress */ | |
97 | }; | |
98 | ||
9c19a7d0 | 99 | struct iscsi_task { |
7996a778 | 100 | /* |
004d6530 BH |
101 | * Because LLDs allocate their hdr differently, this is a pointer |
102 | * and length to that storage. It must be setup at session | |
103 | * creation time. | |
7996a778 | 104 | */ |
577577da | 105 | struct iscsi_hdr *hdr; |
004d6530 BH |
106 | unsigned short hdr_max; |
107 | unsigned short hdr_len; /* accumulated size of hdr used */ | |
577577da MC |
108 | /* copied values in case we need to send tmfs */ |
109 | itt_t hdr_itt; | |
110 | __be32 cmdsn; | |
516f43a2 | 111 | struct scsi_lun lun; |
577577da | 112 | |
7996a778 | 113 | int itt; /* this ITT */ |
7996a778 | 114 | |
857ae0bd | 115 | unsigned imm_count; /* imm-data (bytes) */ |
ffd0436e | 116 | /* offset in unsolicited stream (bytes); */ |
577577da | 117 | struct iscsi_r2t_info unsol_r2t; |
3e5c28ad | 118 | char *data; /* mgmt payload */ |
577577da | 119 | unsigned data_count; |
7996a778 | 120 | struct scsi_cmnd *sc; /* associated SCSI cmd*/ |
7996a778 | 121 | struct iscsi_conn *conn; /* used connection */ |
7996a778 | 122 | |
d355e57d MC |
123 | /* data processing tracking */ |
124 | unsigned long last_xfer; | |
125 | unsigned long last_timeout; | |
126 | bool have_checked_conn; | |
55e51eda SG |
127 | |
128 | /* T10 protection information */ | |
129 | bool protected; | |
130 | ||
b6c395ed MC |
131 | /* state set/tested under session->lock */ |
132 | int state; | |
6dc618cd | 133 | refcount_t refcount; |
7996a778 MC |
134 | struct list_head running; /* running cmd list */ |
135 | void *dd_data; /* driver/transport data */ | |
136 | }; | |
137 | ||
577577da MC |
138 | static inline int iscsi_task_has_unsol_data(struct iscsi_task *task) |
139 | { | |
140 | return task->unsol_r2t.data_length > task->unsol_r2t.sent; | |
141 | } | |
142 | ||
9c19a7d0 | 143 | static inline void* iscsi_next_hdr(struct iscsi_task *task) |
004d6530 | 144 | { |
9c19a7d0 | 145 | return (void*)task->hdr + task->hdr_len; |
004d6530 BH |
146 | } |
147 | ||
1486a4f5 MC |
148 | static inline bool iscsi_task_is_completed(struct iscsi_task *task) |
149 | { | |
150 | return task->state == ISCSI_TASK_COMPLETED || | |
151 | task->state == ISCSI_TASK_ABRT_TMF || | |
152 | task->state == ISCSI_TASK_ABRT_SESS_RECOV; | |
153 | } | |
154 | ||
db22de3e BVA |
155 | /* Private data associated with struct scsi_cmnd. */ |
156 | struct iscsi_cmd { | |
157 | struct iscsi_task *task; | |
158 | int age; | |
159 | }; | |
160 | ||
161 | static inline struct iscsi_cmd *iscsi_cmd(struct scsi_cmnd *cmd) | |
162 | { | |
163 | return scsi_cmd_priv(cmd); | |
164 | } | |
165 | ||
6eabafbe MC |
166 | /* Connection's states */ |
167 | enum { | |
168 | ISCSI_CONN_INITIAL_STAGE, | |
169 | ISCSI_CONN_STARTED, | |
170 | ISCSI_CONN_STOPPED, | |
171 | ISCSI_CONN_CLEANUP_WAIT, | |
172 | }; | |
173 | ||
7996a778 MC |
174 | struct iscsi_conn { |
175 | struct iscsi_cls_conn *cls_conn; /* ptr to class connection */ | |
176 | void *dd_data; /* iscsi_transport data */ | |
177 | struct iscsi_session *session; /* parent session */ | |
7996a778 MC |
178 | /* |
179 | * conn_stop() flag: stop to recover, stop to terminate | |
180 | */ | |
181 | int stop_stage; | |
f6d5180c MC |
182 | struct timer_list transport_timer; |
183 | unsigned long last_recv; | |
184 | unsigned long last_ping; | |
185 | int ping_timeout; | |
186 | int recv_timeout; | |
9c19a7d0 | 187 | struct iscsi_task *ping_task; |
7996a778 MC |
188 | |
189 | /* iSCSI connection-wide sequencing */ | |
190 | uint32_t exp_statsn; | |
f8525eb4 | 191 | uint32_t statsn; |
7996a778 MC |
192 | |
193 | /* control data */ | |
194 | int id; /* CID */ | |
7996a778 | 195 | int c_stage; /* connection state */ |
c8dc1e52 MC |
196 | /* |
197 | * Preallocated buffer for pdus that have data but do not | |
198 | * originate from scsi-ml. We never have two pdus using the | |
199 | * buffer at the same time. It is only allocated to | |
200 | * the default max recv size because the pdus we support | |
201 | * should always fit in this buffer | |
202 | */ | |
203 | char *data; | |
9c19a7d0 MC |
204 | struct iscsi_task *login_task; /* mtask used for login/text */ |
205 | struct iscsi_task *task; /* xmit task in progress */ | |
7996a778 MC |
206 | |
207 | /* xmit */ | |
5923d64b | 208 | /* items must be added/deleted under frwd lock */ |
843c0a8a | 209 | struct list_head mgmtqueue; /* mgmt (control) xmit queue */ |
3bbaaad9 | 210 | struct list_head cmdqueue; /* data-path cmd queue */ |
843c0a8a | 211 | struct list_head requeue; /* tasks needing another run */ |
7996a778 | 212 | struct work_struct xmitwork; /* per-conn. xmit workqueue */ |
8af80996 MC |
213 | /* recv */ |
214 | struct work_struct recvwork; | |
5bd85625 | 215 | unsigned long flags; /* ISCSI_CONN_FLAGs */ |
7996a778 | 216 | |
7996a778 | 217 | /* negotiated params */ |
857ae0bd MC |
218 | unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ |
219 | unsigned max_xmit_dlength; /* target_max_recv_dsl */ | |
7996a778 MC |
220 | int hdrdgst_en; |
221 | int datadgst_en; | |
a54a52ca MC |
222 | int ifmarker_en; |
223 | int ofmarker_en; | |
224 | /* values userspace uses to id a conn */ | |
225 | int persistent_port; | |
226 | char *persistent_address; | |
7996a778 | 227 | |
f8525eb4 AC |
228 | unsigned max_segment_size; |
229 | unsigned tcp_xmit_wsf; | |
230 | unsigned tcp_recv_wsf; | |
231 | uint16_t keepalive_tmo; | |
232 | uint16_t local_port; | |
233 | uint8_t tcp_timestamp_stat; | |
234 | uint8_t tcp_nagle_disable; | |
235 | uint8_t tcp_wsf_disable; | |
236 | uint8_t tcp_timer_scale; | |
237 | uint8_t tcp_timestamp_en; | |
238 | uint8_t fragment_disable; | |
239 | uint8_t ipv4_tos; | |
240 | uint8_t ipv6_traffic_class; | |
241 | uint8_t ipv6_flow_label; | |
242 | uint8_t is_fw_assigned_ipv6; | |
ae56ff40 | 243 | char *local_ipaddr; |
f8525eb4 | 244 | |
7996a778 MC |
245 | /* MIB-statistics */ |
246 | uint64_t txdata_octets; | |
247 | uint64_t rxdata_octets; | |
248 | uint32_t scsicmd_pdus_cnt; | |
249 | uint32_t dataout_pdus_cnt; | |
250 | uint32_t scsirsp_pdus_cnt; | |
251 | uint32_t datain_pdus_cnt; | |
252 | uint32_t r2t_pdus_cnt; | |
253 | uint32_t tmfcmd_pdus_cnt; | |
254 | int32_t tmfrsp_pdus_cnt; | |
255 | ||
256 | /* custom statistics */ | |
257 | uint32_t eh_abort_cnt; | |
87528227 | 258 | uint32_t fmr_unalign_cnt; |
7996a778 MC |
259 | }; |
260 | ||
6320377f | 261 | struct iscsi_pool { |
45465487 | 262 | struct kfifo queue; /* FIFO Queue */ |
7996a778 MC |
263 | void **pool; /* Pool of elements */ |
264 | int max; /* Max number of elements */ | |
265 | }; | |
266 | ||
6eabafbe MC |
267 | /* Session's states */ |
268 | enum { | |
269 | ISCSI_STATE_FREE = 1, | |
270 | ISCSI_STATE_LOGGED_IN, | |
271 | ISCSI_STATE_FAILED, | |
272 | ISCSI_STATE_TERMINATE, | |
273 | ISCSI_STATE_IN_RECOVERY, | |
274 | ISCSI_STATE_RECOVERY_FAILED, | |
275 | ISCSI_STATE_LOGGING_OUT, | |
276 | }; | |
277 | ||
7996a778 | 278 | struct iscsi_session { |
75613521 | 279 | struct iscsi_cls_session *cls_session; |
6724add1 MC |
280 | /* |
281 | * Syncs up the scsi eh thread with the iscsi eh thread when sending | |
282 | * task management functions. This must be taken before the session | |
283 | * and recv lock. | |
284 | */ | |
285 | struct mutex eh_mutex; | |
ec29d0ac MC |
286 | /* abort */ |
287 | wait_queue_head_t ehwait; /* used in eh_abort() */ | |
288 | struct iscsi_tm tmhdr; | |
289 | struct timer_list tmf_timer; | |
290 | int tmf_state; /* see TMF_INITIAL, etc.*/ | |
99b06033 | 291 | struct iscsi_task *running_aborted_task; |
6724add1 | 292 | |
7996a778 MC |
293 | /* iSCSI session-wide sequencing */ |
294 | uint32_t cmdsn; | |
295 | uint32_t exp_cmdsn; | |
296 | uint32_t max_cmdsn; | |
297 | ||
e0726407 MC |
298 | /* This tracks the reqs queued into the initiator */ |
299 | uint32_t queued_cmdsn; | |
300 | ||
7996a778 | 301 | /* configuration */ |
f6d5180c MC |
302 | int abort_timeout; |
303 | int lu_reset_timeout; | |
3fe5ae8b | 304 | int tgt_reset_timeout; |
7996a778 | 305 | int initial_r2t_en; |
1304be5f | 306 | unsigned short max_r2t; |
7996a778 | 307 | int imm_data_en; |
857ae0bd MC |
308 | unsigned first_burst; |
309 | unsigned max_burst; | |
7996a778 MC |
310 | int time2wait; |
311 | int time2retain; | |
312 | int pdu_inorder_en; | |
313 | int dataseq_inorder_en; | |
314 | int erl; | |
843c0a8a | 315 | int fast_abort; |
a54a52ca | 316 | int tpgt; |
b2c64167 MC |
317 | char *username; |
318 | char *username_in; | |
319 | char *password; | |
320 | char *password_in; | |
a54a52ca | 321 | char *targetname; |
3c5c4801 | 322 | char *targetalias; |
88dfd340 MC |
323 | char *ifacename; |
324 | char *initiatorname; | |
3b9373e9 EW |
325 | char *boot_root; |
326 | char *boot_nic; | |
327 | char *boot_target; | |
f8525eb4 AC |
328 | char *portal_type; |
329 | char *discovery_parent_type; | |
330 | uint16_t discovery_parent_idx; | |
331 | uint16_t def_taskmgmt_tmo; | |
332 | uint16_t tsid; | |
333 | uint8_t auto_snd_tgt_disable; | |
334 | uint8_t discovery_sess; | |
335 | uint8_t chap_auth_en; | |
336 | uint8_t discovery_logout_en; | |
337 | uint8_t bidi_chap_en; | |
338 | uint8_t discovery_auth_optional; | |
339 | uint8_t isid[ISID_SIZE]; | |
3b9373e9 | 340 | |
7996a778 MC |
341 | /* control data */ |
342 | struct iscsi_transport *tt; | |
343 | struct Scsi_Host *host; | |
344 | struct iscsi_conn *leadconn; /* leading connection */ | |
659743b0 SP |
345 | /* Between the forward and the backward locks exists a strict locking |
346 | * hierarchy. The mutual exclusion zone protected by the forward lock | |
347 | * can enclose the mutual exclusion zone protected by the backward lock | |
348 | * but not vice versa. | |
349 | */ | |
350 | spinlock_t frwd_lock; /* protects session state, * | |
351 | * cmdsn, queued_cmdsn * | |
7996a778 | 352 | * session resources: * |
659743b0 | 353 | * - cmdpool kfifo_out , * |
5923d64b | 354 | * - mgmtpool, queues */ |
659743b0 SP |
355 | spinlock_t back_lock; /* protects cmdsn_exp * |
356 | * cmdsn_max, * | |
357 | * cmdpool kfifo_in */ | |
7996a778 | 358 | int state; /* session state */ |
7996a778 MC |
359 | int age; /* counts session re-opens */ |
360 | ||
3e5c28ad | 361 | int scsi_cmds_max; /* max scsi commands */ |
7996a778 | 362 | int cmds_max; /* size of cmds array */ |
9c19a7d0 | 363 | struct iscsi_task **cmds; /* Original Cmds arr */ |
6320377f | 364 | struct iscsi_pool cmdpool; /* PDU's pool */ |
b8b9e1b8 | 365 | void *dd_data; /* LLD private data */ |
7996a778 MC |
366 | }; |
367 | ||
e5bd7b54 MC |
368 | enum { |
369 | ISCSI_HOST_SETUP, | |
370 | ISCSI_HOST_REMOVED, | |
371 | }; | |
372 | ||
75613521 MC |
373 | struct iscsi_host { |
374 | char *initiatorname; | |
375 | /* hw address or netdev iscsi connection is bound to */ | |
376 | char *hwaddress; | |
377 | char *netdev; | |
e5bd7b54 MC |
378 | |
379 | wait_queue_head_t session_removal_wq; | |
380 | /* protects sessions and state */ | |
381 | spinlock_t lock; | |
382 | int num_sessions; | |
383 | int state; | |
32ae763e MC |
384 | |
385 | struct workqueue_struct *workq; | |
75613521 MC |
386 | }; |
387 | ||
7996a778 MC |
388 | /* |
389 | * scsi host template | |
390 | */ | |
7996a778 | 391 | extern int iscsi_eh_abort(struct scsi_cmnd *sc); |
309ce156 JK |
392 | extern int iscsi_eh_recover_target(struct scsi_cmnd *sc); |
393 | extern int iscsi_eh_session_reset(struct scsi_cmnd *sc); | |
843c0a8a | 394 | extern int iscsi_eh_device_reset(struct scsi_cmnd *sc); |
f41d4721 | 395 | extern int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc); |
dee7121e | 396 | extern enum scsi_timeout_action iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc); |
0801c242 | 397 | |
0801c242 MC |
398 | /* |
399 | * iSCSI host helpers. | |
400 | */ | |
5d91e209 MC |
401 | #define iscsi_host_priv(_shost) \ |
402 | (shost_priv(_shost) + sizeof(struct iscsi_host)) | |
403 | ||
0801c242 MC |
404 | extern int iscsi_host_set_param(struct Scsi_Host *shost, |
405 | enum iscsi_host_param param, char *buf, | |
406 | int buflen); | |
407 | extern int iscsi_host_get_param(struct Scsi_Host *shost, | |
408 | enum iscsi_host_param param, char *buf); | |
a4804cd6 | 409 | extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev); |
80602aca | 410 | extern struct Scsi_Host *iscsi_host_alloc(const struct scsi_host_template *sht, |
4d108350 | 411 | int dd_data_size, |
32ae763e | 412 | bool xmit_can_sleep); |
31500e90 | 413 | extern void iscsi_host_remove(struct Scsi_Host *shost, bool is_shutdown); |
a4804cd6 | 414 | extern void iscsi_host_free(struct Scsi_Host *shost); |
6b5d6c44 | 415 | extern int iscsi_target_alloc(struct scsi_target *starget); |
b4046922 MC |
416 | extern int iscsi_host_get_max_scsi_cmds(struct Scsi_Host *shost, |
417 | uint16_t requested_cmds_max); | |
7996a778 MC |
418 | |
419 | /* | |
420 | * session management | |
421 | */ | |
422 | extern struct iscsi_cls_session * | |
75613521 | 423 | iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost, |
b8b9e1b8 | 424 | uint16_t, int, int, uint32_t, unsigned int); |
6f1d64b1 MC |
425 | void iscsi_session_remove(struct iscsi_cls_session *cls_session); |
426 | void iscsi_session_free(struct iscsi_cls_session *cls_session); | |
7996a778 | 427 | extern void iscsi_session_teardown(struct iscsi_cls_session *); |
7996a778 | 428 | extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *); |
a54a52ca MC |
429 | extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
430 | enum iscsi_param param, char *buf, int buflen); | |
431 | extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session, | |
432 | enum iscsi_param param, char *buf); | |
7996a778 | 433 | |
322d739d | 434 | #define iscsi_session_printk(prefix, _sess, fmt, a...) \ |
75613521 | 435 | iscsi_cls_session_printk(prefix, _sess->cls_session, fmt, ##a) |
322d739d | 436 | |
7996a778 MC |
437 | /* |
438 | * connection management | |
439 | */ | |
440 | extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *, | |
5d91e209 | 441 | int, uint32_t); |
7996a778 MC |
442 | extern void iscsi_conn_teardown(struct iscsi_cls_conn *); |
443 | extern int iscsi_conn_start(struct iscsi_cls_conn *); | |
444 | extern void iscsi_conn_stop(struct iscsi_cls_conn *, int); | |
445 | extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *, | |
446 | int); | |
891e2639 | 447 | extern void iscsi_conn_unbind(struct iscsi_cls_conn *cls_conn, bool is_active); |
7996a778 | 448 | extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err); |
40a06e75 | 449 | extern void iscsi_session_failure(struct iscsi_session *session, |
e5bd7b54 | 450 | enum iscsi_err err); |
a54a52ca MC |
451 | extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
452 | enum iscsi_param param, char *buf); | |
00f3708e MC |
453 | extern int iscsi_conn_get_addr_param(struct sockaddr_storage *addr, |
454 | enum iscsi_param param, char *buf); | |
5af3e91d | 455 | extern void iscsi_suspend_tx(struct iscsi_conn *conn); |
8af80996 | 456 | extern void iscsi_suspend_rx(struct iscsi_conn *conn); |
661134ad | 457 | extern void iscsi_suspend_queue(struct iscsi_conn *conn); |
4b9f8ce4 | 458 | extern void iscsi_conn_queue_xmit(struct iscsi_conn *conn); |
8af80996 | 459 | extern void iscsi_conn_queue_recv(struct iscsi_conn *conn); |
7996a778 | 460 | |
322d739d | 461 | #define iscsi_conn_printk(prefix, _c, fmt, a...) \ |
5af3e91d MC |
462 | iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \ |
463 | fmt, ##a) | |
322d739d | 464 | |
7996a778 MC |
465 | /* |
466 | * pdu and task processing | |
467 | */ | |
77a23c21 | 468 | extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *); |
577577da MC |
469 | extern void iscsi_prep_data_out_pdu(struct iscsi_task *task, |
470 | struct iscsi_r2t_info *r2t, | |
471 | struct iscsi_data *hdr); | |
7996a778 MC |
472 | extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *, |
473 | char *, uint32_t); | |
474 | extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, | |
475 | char *, int); | |
913e5bf4 MC |
476 | extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, |
477 | char *, int); | |
0af967f5 | 478 | extern int iscsi_verify_itt(struct iscsi_conn *, itt_t); |
9c19a7d0 | 479 | extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t); |
8f9256ce | 480 | extern struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *, itt_t); |
9c19a7d0 MC |
481 | extern void iscsi_requeue_task(struct iscsi_task *task); |
482 | extern void iscsi_put_task(struct iscsi_task *task); | |
8eea2f55 | 483 | extern void __iscsi_put_task(struct iscsi_task *task); |
e1c6a7ec | 484 | extern bool iscsi_get_task(struct iscsi_task *task); |
4c0ba5d2 MC |
485 | extern void iscsi_complete_scsi_task(struct iscsi_task *task, |
486 | uint32_t exp_cmdsn, uint32_t max_cmdsn); | |
7996a778 MC |
487 | |
488 | /* | |
489 | * generic helpers | |
490 | */ | |
6320377f OK |
491 | extern void iscsi_pool_free(struct iscsi_pool *); |
492 | extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int); | |
adaf6990 | 493 | extern int iscsi_switch_str_param(char **, char *); |
7996a778 | 494 | |
004d6530 BH |
495 | /* |
496 | * inline functions to deal with padding. | |
497 | */ | |
498 | static inline unsigned int | |
499 | iscsi_padded(unsigned int len) | |
500 | { | |
501 | return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1); | |
502 | } | |
503 | ||
504 | static inline unsigned int | |
505 | iscsi_padding(unsigned int len) | |
506 | { | |
507 | len &= (ISCSI_PAD_LEN - 1); | |
508 | if (len) | |
509 | len = ISCSI_PAD_LEN - len; | |
510 | return len; | |
511 | } | |
512 | ||
7996a778 | 513 | #endif |