Commit | Line | Data |
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7996a778 MC |
1 | /* |
2 | * iSCSI lib definitions | |
3 | * | |
4 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. | |
5 | * Copyright (C) 2004 - 2006 Mike Christie | |
6 | * Copyright (C) 2004 - 2005 Dmitry Yusupov | |
7 | * Copyright (C) 2004 - 2005 Alex Aizman | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #ifndef LIBISCSI_H | |
24 | #define LIBISCSI_H | |
25 | ||
26 | #include <linux/types.h> | |
40753caa | 27 | #include <linux/wait.h> |
7996a778 | 28 | #include <linux/mutex.h> |
f6a57033 AV |
29 | #include <linux/timer.h> |
30 | #include <linux/workqueue.h> | |
45465487 | 31 | #include <linux/kfifo.h> |
6dc618cd | 32 | #include <linux/refcount.h> |
7996a778 MC |
33 | #include <scsi/iscsi_proto.h> |
34 | #include <scsi/iscsi_if.h> | |
262ef636 | 35 | #include <scsi/scsi_transport_iscsi.h> |
7996a778 MC |
36 | |
37 | struct scsi_transport_template; | |
a4804cd6 | 38 | struct scsi_host_template; |
7996a778 MC |
39 | struct scsi_device; |
40 | struct Scsi_Host; | |
6b5d6c44 | 41 | struct scsi_target; |
7996a778 MC |
42 | struct scsi_cmnd; |
43 | struct socket; | |
44 | struct iscsi_transport; | |
45 | struct iscsi_cls_session; | |
46 | struct iscsi_cls_conn; | |
47 | struct iscsi_session; | |
48 | struct iscsi_nopin; | |
a4804cd6 | 49 | struct device; |
7996a778 | 50 | |
1548271e | 51 | #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */ |
3cf7b233 | 52 | #define ISCSI_MGMT_CMDS_MAX 15 |
7996a778 | 53 | |
e28f3d5b | 54 | #define ISCSI_DEF_CMD_PER_LUN 32 |
7996a778 MC |
55 | |
56 | /* Task Mgmt states */ | |
843c0a8a MC |
57 | enum { |
58 | TMF_INITIAL, | |
59 | TMF_QUEUED, | |
60 | TMF_SUCCESS, | |
61 | TMF_FAILED, | |
62 | TMF_TIMEDOUT, | |
63 | TMF_NOT_FOUND, | |
64 | }; | |
7996a778 | 65 | |
f8525eb4 AC |
66 | #define ISID_SIZE 6 |
67 | ||
7996a778 MC |
68 | /* Connection suspend "bit" */ |
69 | #define ISCSI_SUSPEND_BIT 1 | |
70 | ||
262ef636 | 71 | #define ISCSI_ITT_MASK 0x1fff |
3cf7b233 MC |
72 | #define ISCSI_TOTAL_CMDS_MAX 4096 |
73 | /* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */ | |
74 | #define ISCSI_TOTAL_CMDS_MIN 16 | |
7996a778 | 75 | #define ISCSI_AGE_SHIFT 28 |
262ef636 | 76 | #define ISCSI_AGE_MASK 0xf |
7996a778 | 77 | |
22236961 MC |
78 | #define ISCSI_ADDRESS_BUF_LEN 64 |
79 | ||
da32dd68 | 80 | enum { |
004d6530 BH |
81 | /* this is the maximum possible storage for AHSs */ |
82 | ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) + | |
83 | sizeof(struct iscsi_rlength_ahdr), | |
da32dd68 OK |
84 | ISCSI_DIGEST_SIZE = sizeof(__u32), |
85 | }; | |
86 | ||
7996a778 | 87 | |
b6c395ed | 88 | enum { |
3bbaaad9 | 89 | ISCSI_TASK_FREE, |
b6c395ed MC |
90 | ISCSI_TASK_COMPLETED, |
91 | ISCSI_TASK_PENDING, | |
92 | ISCSI_TASK_RUNNING, | |
b3cd5050 MC |
93 | ISCSI_TASK_ABRT_TMF, /* aborted due to TMF */ |
94 | ISCSI_TASK_ABRT_SESS_RECOV, /* aborted due to session recovery */ | |
f41d4721 | 95 | ISCSI_TASK_REQUEUE_SCSIQ, /* qcmd requeueing to scsi-ml */ |
b6c395ed MC |
96 | }; |
97 | ||
577577da MC |
98 | struct iscsi_r2t_info { |
99 | __be32 ttt; /* copied from R2T */ | |
100 | __be32 exp_statsn; /* copied from R2T */ | |
101 | uint32_t data_length; /* copied from R2T */ | |
102 | uint32_t data_offset; /* copied from R2T */ | |
103 | int data_count; /* DATA-Out payload progress */ | |
104 | int datasn; | |
105 | /* LLDs should set/update these values */ | |
106 | int sent; /* R2T sequence progress */ | |
107 | }; | |
108 | ||
9c19a7d0 | 109 | struct iscsi_task { |
7996a778 | 110 | /* |
004d6530 BH |
111 | * Because LLDs allocate their hdr differently, this is a pointer |
112 | * and length to that storage. It must be setup at session | |
113 | * creation time. | |
7996a778 | 114 | */ |
577577da | 115 | struct iscsi_hdr *hdr; |
004d6530 BH |
116 | unsigned short hdr_max; |
117 | unsigned short hdr_len; /* accumulated size of hdr used */ | |
577577da MC |
118 | /* copied values in case we need to send tmfs */ |
119 | itt_t hdr_itt; | |
120 | __be32 cmdsn; | |
516f43a2 | 121 | struct scsi_lun lun; |
577577da | 122 | |
7996a778 | 123 | int itt; /* this ITT */ |
7996a778 | 124 | |
857ae0bd | 125 | unsigned imm_count; /* imm-data (bytes) */ |
ffd0436e | 126 | /* offset in unsolicited stream (bytes); */ |
577577da | 127 | struct iscsi_r2t_info unsol_r2t; |
3e5c28ad | 128 | char *data; /* mgmt payload */ |
577577da | 129 | unsigned data_count; |
7996a778 | 130 | struct scsi_cmnd *sc; /* associated SCSI cmd*/ |
7996a778 | 131 | struct iscsi_conn *conn; /* used connection */ |
7996a778 | 132 | |
d355e57d MC |
133 | /* data processing tracking */ |
134 | unsigned long last_xfer; | |
135 | unsigned long last_timeout; | |
136 | bool have_checked_conn; | |
55e51eda SG |
137 | |
138 | /* T10 protection information */ | |
139 | bool protected; | |
140 | ||
b6c395ed MC |
141 | /* state set/tested under session->lock */ |
142 | int state; | |
6dc618cd | 143 | refcount_t refcount; |
7996a778 MC |
144 | struct list_head running; /* running cmd list */ |
145 | void *dd_data; /* driver/transport data */ | |
146 | }; | |
147 | ||
577577da MC |
148 | static inline int iscsi_task_has_unsol_data(struct iscsi_task *task) |
149 | { | |
150 | return task->unsol_r2t.data_length > task->unsol_r2t.sent; | |
151 | } | |
152 | ||
9c19a7d0 | 153 | static inline void* iscsi_next_hdr(struct iscsi_task *task) |
004d6530 | 154 | { |
9c19a7d0 | 155 | return (void*)task->hdr + task->hdr_len; |
004d6530 BH |
156 | } |
157 | ||
6eabafbe MC |
158 | /* Connection's states */ |
159 | enum { | |
160 | ISCSI_CONN_INITIAL_STAGE, | |
161 | ISCSI_CONN_STARTED, | |
162 | ISCSI_CONN_STOPPED, | |
163 | ISCSI_CONN_CLEANUP_WAIT, | |
164 | }; | |
165 | ||
7996a778 MC |
166 | struct iscsi_conn { |
167 | struct iscsi_cls_conn *cls_conn; /* ptr to class connection */ | |
168 | void *dd_data; /* iscsi_transport data */ | |
169 | struct iscsi_session *session; /* parent session */ | |
7996a778 MC |
170 | /* |
171 | * conn_stop() flag: stop to recover, stop to terminate | |
172 | */ | |
173 | int stop_stage; | |
f6d5180c MC |
174 | struct timer_list transport_timer; |
175 | unsigned long last_recv; | |
176 | unsigned long last_ping; | |
177 | int ping_timeout; | |
178 | int recv_timeout; | |
9c19a7d0 | 179 | struct iscsi_task *ping_task; |
7996a778 MC |
180 | |
181 | /* iSCSI connection-wide sequencing */ | |
182 | uint32_t exp_statsn; | |
f8525eb4 | 183 | uint32_t statsn; |
7996a778 MC |
184 | |
185 | /* control data */ | |
186 | int id; /* CID */ | |
7996a778 | 187 | int c_stage; /* connection state */ |
c8dc1e52 MC |
188 | /* |
189 | * Preallocated buffer for pdus that have data but do not | |
190 | * originate from scsi-ml. We never have two pdus using the | |
191 | * buffer at the same time. It is only allocated to | |
192 | * the default max recv size because the pdus we support | |
193 | * should always fit in this buffer | |
194 | */ | |
195 | char *data; | |
9c19a7d0 MC |
196 | struct iscsi_task *login_task; /* mtask used for login/text */ |
197 | struct iscsi_task *task; /* xmit task in progress */ | |
7996a778 MC |
198 | |
199 | /* xmit */ | |
6f8830f5 | 200 | spinlock_t taskqueuelock; /* protects the next three lists */ |
843c0a8a | 201 | struct list_head mgmtqueue; /* mgmt (control) xmit queue */ |
3bbaaad9 | 202 | struct list_head cmdqueue; /* data-path cmd queue */ |
843c0a8a | 203 | struct list_head requeue; /* tasks needing another run */ |
7996a778 | 204 | struct work_struct xmitwork; /* per-conn. xmit workqueue */ |
7996a778 MC |
205 | unsigned long suspend_tx; /* suspend Tx */ |
206 | unsigned long suspend_rx; /* suspend Rx */ | |
207 | ||
208 | /* abort */ | |
209 | wait_queue_head_t ehwait; /* used in eh_abort() */ | |
210 | struct iscsi_tm tmhdr; | |
843c0a8a MC |
211 | struct timer_list tmf_timer; |
212 | int tmf_state; /* see TMF_INITIAL, etc.*/ | |
7996a778 MC |
213 | |
214 | /* negotiated params */ | |
857ae0bd MC |
215 | unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ |
216 | unsigned max_xmit_dlength; /* target_max_recv_dsl */ | |
7996a778 MC |
217 | int hdrdgst_en; |
218 | int datadgst_en; | |
a54a52ca MC |
219 | int ifmarker_en; |
220 | int ofmarker_en; | |
221 | /* values userspace uses to id a conn */ | |
222 | int persistent_port; | |
223 | char *persistent_address; | |
7996a778 | 224 | |
f8525eb4 AC |
225 | unsigned max_segment_size; |
226 | unsigned tcp_xmit_wsf; | |
227 | unsigned tcp_recv_wsf; | |
228 | uint16_t keepalive_tmo; | |
229 | uint16_t local_port; | |
230 | uint8_t tcp_timestamp_stat; | |
231 | uint8_t tcp_nagle_disable; | |
232 | uint8_t tcp_wsf_disable; | |
233 | uint8_t tcp_timer_scale; | |
234 | uint8_t tcp_timestamp_en; | |
235 | uint8_t fragment_disable; | |
236 | uint8_t ipv4_tos; | |
237 | uint8_t ipv6_traffic_class; | |
238 | uint8_t ipv6_flow_label; | |
239 | uint8_t is_fw_assigned_ipv6; | |
ae56ff40 | 240 | char *local_ipaddr; |
f8525eb4 | 241 | |
7996a778 MC |
242 | /* MIB-statistics */ |
243 | uint64_t txdata_octets; | |
244 | uint64_t rxdata_octets; | |
245 | uint32_t scsicmd_pdus_cnt; | |
246 | uint32_t dataout_pdus_cnt; | |
247 | uint32_t scsirsp_pdus_cnt; | |
248 | uint32_t datain_pdus_cnt; | |
249 | uint32_t r2t_pdus_cnt; | |
250 | uint32_t tmfcmd_pdus_cnt; | |
251 | int32_t tmfrsp_pdus_cnt; | |
252 | ||
253 | /* custom statistics */ | |
254 | uint32_t eh_abort_cnt; | |
87528227 | 255 | uint32_t fmr_unalign_cnt; |
7996a778 MC |
256 | }; |
257 | ||
6320377f | 258 | struct iscsi_pool { |
45465487 | 259 | struct kfifo queue; /* FIFO Queue */ |
7996a778 MC |
260 | void **pool; /* Pool of elements */ |
261 | int max; /* Max number of elements */ | |
262 | }; | |
263 | ||
6eabafbe MC |
264 | /* Session's states */ |
265 | enum { | |
266 | ISCSI_STATE_FREE = 1, | |
267 | ISCSI_STATE_LOGGED_IN, | |
268 | ISCSI_STATE_FAILED, | |
269 | ISCSI_STATE_TERMINATE, | |
270 | ISCSI_STATE_IN_RECOVERY, | |
271 | ISCSI_STATE_RECOVERY_FAILED, | |
272 | ISCSI_STATE_LOGGING_OUT, | |
273 | }; | |
274 | ||
7996a778 | 275 | struct iscsi_session { |
75613521 | 276 | struct iscsi_cls_session *cls_session; |
6724add1 MC |
277 | /* |
278 | * Syncs up the scsi eh thread with the iscsi eh thread when sending | |
279 | * task management functions. This must be taken before the session | |
280 | * and recv lock. | |
281 | */ | |
282 | struct mutex eh_mutex; | |
283 | ||
7996a778 MC |
284 | /* iSCSI session-wide sequencing */ |
285 | uint32_t cmdsn; | |
286 | uint32_t exp_cmdsn; | |
287 | uint32_t max_cmdsn; | |
288 | ||
e0726407 MC |
289 | /* This tracks the reqs queued into the initiator */ |
290 | uint32_t queued_cmdsn; | |
291 | ||
7996a778 | 292 | /* configuration */ |
f6d5180c MC |
293 | int abort_timeout; |
294 | int lu_reset_timeout; | |
3fe5ae8b | 295 | int tgt_reset_timeout; |
7996a778 | 296 | int initial_r2t_en; |
1304be5f | 297 | unsigned short max_r2t; |
7996a778 | 298 | int imm_data_en; |
857ae0bd MC |
299 | unsigned first_burst; |
300 | unsigned max_burst; | |
7996a778 MC |
301 | int time2wait; |
302 | int time2retain; | |
303 | int pdu_inorder_en; | |
304 | int dataseq_inorder_en; | |
305 | int erl; | |
843c0a8a | 306 | int fast_abort; |
a54a52ca | 307 | int tpgt; |
b2c64167 MC |
308 | char *username; |
309 | char *username_in; | |
310 | char *password; | |
311 | char *password_in; | |
a54a52ca | 312 | char *targetname; |
3c5c4801 | 313 | char *targetalias; |
88dfd340 MC |
314 | char *ifacename; |
315 | char *initiatorname; | |
3b9373e9 EW |
316 | char *boot_root; |
317 | char *boot_nic; | |
318 | char *boot_target; | |
f8525eb4 AC |
319 | char *portal_type; |
320 | char *discovery_parent_type; | |
321 | uint16_t discovery_parent_idx; | |
322 | uint16_t def_taskmgmt_tmo; | |
323 | uint16_t tsid; | |
324 | uint8_t auto_snd_tgt_disable; | |
325 | uint8_t discovery_sess; | |
326 | uint8_t chap_auth_en; | |
327 | uint8_t discovery_logout_en; | |
328 | uint8_t bidi_chap_en; | |
329 | uint8_t discovery_auth_optional; | |
330 | uint8_t isid[ISID_SIZE]; | |
3b9373e9 | 331 | |
7996a778 MC |
332 | /* control data */ |
333 | struct iscsi_transport *tt; | |
334 | struct Scsi_Host *host; | |
335 | struct iscsi_conn *leadconn; /* leading connection */ | |
659743b0 SP |
336 | /* Between the forward and the backward locks exists a strict locking |
337 | * hierarchy. The mutual exclusion zone protected by the forward lock | |
338 | * can enclose the mutual exclusion zone protected by the backward lock | |
339 | * but not vice versa. | |
340 | */ | |
341 | spinlock_t frwd_lock; /* protects session state, * | |
342 | * cmdsn, queued_cmdsn * | |
7996a778 | 343 | * session resources: * |
659743b0 SP |
344 | * - cmdpool kfifo_out , * |
345 | * - mgmtpool, */ | |
346 | spinlock_t back_lock; /* protects cmdsn_exp * | |
347 | * cmdsn_max, * | |
348 | * cmdpool kfifo_in */ | |
7996a778 | 349 | int state; /* session state */ |
7996a778 MC |
350 | int age; /* counts session re-opens */ |
351 | ||
3e5c28ad | 352 | int scsi_cmds_max; /* max scsi commands */ |
7996a778 | 353 | int cmds_max; /* size of cmds array */ |
9c19a7d0 | 354 | struct iscsi_task **cmds; /* Original Cmds arr */ |
6320377f | 355 | struct iscsi_pool cmdpool; /* PDU's pool */ |
b8b9e1b8 | 356 | void *dd_data; /* LLD private data */ |
7996a778 MC |
357 | }; |
358 | ||
e5bd7b54 MC |
359 | enum { |
360 | ISCSI_HOST_SETUP, | |
361 | ISCSI_HOST_REMOVED, | |
362 | }; | |
363 | ||
75613521 MC |
364 | struct iscsi_host { |
365 | char *initiatorname; | |
366 | /* hw address or netdev iscsi connection is bound to */ | |
367 | char *hwaddress; | |
368 | char *netdev; | |
e5bd7b54 MC |
369 | |
370 | wait_queue_head_t session_removal_wq; | |
371 | /* protects sessions and state */ | |
372 | spinlock_t lock; | |
373 | int num_sessions; | |
374 | int state; | |
32ae763e MC |
375 | |
376 | struct workqueue_struct *workq; | |
377 | char workq_name[20]; | |
75613521 MC |
378 | }; |
379 | ||
7996a778 MC |
380 | /* |
381 | * scsi host template | |
382 | */ | |
7996a778 | 383 | extern int iscsi_eh_abort(struct scsi_cmnd *sc); |
309ce156 JK |
384 | extern int iscsi_eh_recover_target(struct scsi_cmnd *sc); |
385 | extern int iscsi_eh_session_reset(struct scsi_cmnd *sc); | |
843c0a8a | 386 | extern int iscsi_eh_device_reset(struct scsi_cmnd *sc); |
f41d4721 | 387 | extern int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc); |
b6a05c82 | 388 | extern enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc); |
0801c242 | 389 | |
0801c242 MC |
390 | /* |
391 | * iSCSI host helpers. | |
392 | */ | |
5d91e209 MC |
393 | #define iscsi_host_priv(_shost) \ |
394 | (shost_priv(_shost) + sizeof(struct iscsi_host)) | |
395 | ||
0801c242 MC |
396 | extern int iscsi_host_set_param(struct Scsi_Host *shost, |
397 | enum iscsi_host_param param, char *buf, | |
398 | int buflen); | |
399 | extern int iscsi_host_get_param(struct Scsi_Host *shost, | |
400 | enum iscsi_host_param param, char *buf); | |
a4804cd6 MC |
401 | extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev); |
402 | extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht, | |
4d108350 | 403 | int dd_data_size, |
32ae763e | 404 | bool xmit_can_sleep); |
a4804cd6 MC |
405 | extern void iscsi_host_remove(struct Scsi_Host *shost); |
406 | extern void iscsi_host_free(struct Scsi_Host *shost); | |
6b5d6c44 | 407 | extern int iscsi_target_alloc(struct scsi_target *starget); |
7996a778 MC |
408 | |
409 | /* | |
410 | * session management | |
411 | */ | |
412 | extern struct iscsi_cls_session * | |
75613521 | 413 | iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost, |
b8b9e1b8 | 414 | uint16_t, int, int, uint32_t, unsigned int); |
7996a778 | 415 | extern void iscsi_session_teardown(struct iscsi_cls_session *); |
7996a778 | 416 | extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *); |
a54a52ca MC |
417 | extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn, |
418 | enum iscsi_param param, char *buf, int buflen); | |
419 | extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session, | |
420 | enum iscsi_param param, char *buf); | |
7996a778 | 421 | |
322d739d | 422 | #define iscsi_session_printk(prefix, _sess, fmt, a...) \ |
75613521 | 423 | iscsi_cls_session_printk(prefix, _sess->cls_session, fmt, ##a) |
322d739d | 424 | |
7996a778 MC |
425 | /* |
426 | * connection management | |
427 | */ | |
428 | extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *, | |
5d91e209 | 429 | int, uint32_t); |
7996a778 MC |
430 | extern void iscsi_conn_teardown(struct iscsi_cls_conn *); |
431 | extern int iscsi_conn_start(struct iscsi_cls_conn *); | |
432 | extern void iscsi_conn_stop(struct iscsi_cls_conn *, int); | |
433 | extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *, | |
434 | int); | |
435 | extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err); | |
40a06e75 | 436 | extern void iscsi_session_failure(struct iscsi_session *session, |
e5bd7b54 | 437 | enum iscsi_err err); |
a54a52ca MC |
438 | extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, |
439 | enum iscsi_param param, char *buf); | |
00f3708e MC |
440 | extern int iscsi_conn_get_addr_param(struct sockaddr_storage *addr, |
441 | enum iscsi_param param, char *buf); | |
5af3e91d | 442 | extern void iscsi_suspend_tx(struct iscsi_conn *conn); |
661134ad | 443 | extern void iscsi_suspend_queue(struct iscsi_conn *conn); |
32ae763e | 444 | extern void iscsi_conn_queue_work(struct iscsi_conn *conn); |
7996a778 | 445 | |
322d739d | 446 | #define iscsi_conn_printk(prefix, _c, fmt, a...) \ |
5af3e91d MC |
447 | iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \ |
448 | fmt, ##a) | |
322d739d | 449 | |
7996a778 MC |
450 | /* |
451 | * pdu and task processing | |
452 | */ | |
77a23c21 | 453 | extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *); |
577577da MC |
454 | extern void iscsi_prep_data_out_pdu(struct iscsi_task *task, |
455 | struct iscsi_r2t_info *r2t, | |
456 | struct iscsi_data *hdr); | |
7996a778 MC |
457 | extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *, |
458 | char *, uint32_t); | |
459 | extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, | |
460 | char *, int); | |
913e5bf4 MC |
461 | extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, |
462 | char *, int); | |
0af967f5 | 463 | extern int iscsi_verify_itt(struct iscsi_conn *, itt_t); |
9c19a7d0 | 464 | extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t); |
8f9256ce | 465 | extern struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *, itt_t); |
9c19a7d0 MC |
466 | extern void iscsi_requeue_task(struct iscsi_task *task); |
467 | extern void iscsi_put_task(struct iscsi_task *task); | |
8eea2f55 | 468 | extern void __iscsi_put_task(struct iscsi_task *task); |
913e5bf4 | 469 | extern void __iscsi_get_task(struct iscsi_task *task); |
4c0ba5d2 MC |
470 | extern void iscsi_complete_scsi_task(struct iscsi_task *task, |
471 | uint32_t exp_cmdsn, uint32_t max_cmdsn); | |
7996a778 MC |
472 | |
473 | /* | |
474 | * generic helpers | |
475 | */ | |
6320377f OK |
476 | extern void iscsi_pool_free(struct iscsi_pool *); |
477 | extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int); | |
adaf6990 | 478 | extern int iscsi_switch_str_param(char **, char *); |
7996a778 | 479 | |
004d6530 BH |
480 | /* |
481 | * inline functions to deal with padding. | |
482 | */ | |
483 | static inline unsigned int | |
484 | iscsi_padded(unsigned int len) | |
485 | { | |
486 | return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1); | |
487 | } | |
488 | ||
489 | static inline unsigned int | |
490 | iscsi_padding(unsigned int len) | |
491 | { | |
492 | len &= (ISCSI_PAD_LEN - 1); | |
493 | if (len) | |
494 | len = ISCSI_PAD_LEN - len; | |
495 | return len; | |
496 | } | |
497 | ||
7996a778 | 498 | #endif |