1 /*******************************************************************************
2  * This file contains the configfs implementation for iSCSI Target mode
3  * from the LIO-Target Project.
4  *
5  * (c) Copyright 2007-2013 Datera, Inc.
6  *
7  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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 
20 #include <linux/configfs.h>
21 #include <linux/ctype.h>
22 #include <linux/export.h>
23 #include <linux/inet.h>
24 #include <linux/module.h>
25 #include <net/ipv6.h>
26 #include <target/target_core_base.h>
27 #include <target/target_core_fabric.h>
28 #include <target/iscsi/iscsi_transport.h>
29 #include <target/iscsi/iscsi_target_core.h>
30 #include "iscsi_target_parameters.h"
31 #include "iscsi_target_device.h"
32 #include "iscsi_target_erl0.h"
33 #include "iscsi_target_nodeattrib.h"
34 #include "iscsi_target_tpg.h"
35 #include "iscsi_target_util.h"
36 #include "iscsi_target.h"
37 #include <target/iscsi/iscsi_target_stat.h>
38 
39 
40 /* Start items for lio_target_portal_cit */
41 
42 static inline struct iscsi_tpg_np *to_iscsi_tpg_np(struct config_item *item)
43 {
44 	return container_of(to_tpg_np(item), struct iscsi_tpg_np, se_tpg_np);
45 }
46 
47 static ssize_t lio_target_np_driver_show(struct config_item *item, char *page,
48 					 enum iscsit_transport_type type)
49 {
50 	struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
51 	struct iscsi_tpg_np *tpg_np_new;
52 	ssize_t rb;
53 
54 	tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type);
55 	if (tpg_np_new)
56 		rb = sprintf(page, "1\n");
57 	else
58 		rb = sprintf(page, "0\n");
59 
60 	return rb;
61 }
62 
63 static ssize_t lio_target_np_driver_store(struct config_item *item,
64 		const char *page, size_t count, enum iscsit_transport_type type,
65 		const char *mod_name)
66 {
67 	struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
68 	struct iscsi_np *np;
69 	struct iscsi_portal_group *tpg;
70 	struct iscsi_tpg_np *tpg_np_new = NULL;
71 	u32 op;
72 	int rc;
73 
74 	rc = kstrtou32(page, 0, &op);
75 	if (rc)
76 		return rc;
77 	if ((op != 1) && (op != 0)) {
78 		pr_err("Illegal value for tpg_enable: %u\n", op);
79 		return -EINVAL;
80 	}
81 	np = tpg_np->tpg_np;
82 	if (!np) {
83 		pr_err("Unable to locate struct iscsi_np from"
84 				" struct iscsi_tpg_np\n");
85 		return -EINVAL;
86 	}
87 
88 	tpg = tpg_np->tpg;
89 	if (iscsit_get_tpg(tpg) < 0)
90 		return -EINVAL;
91 
92 	if (op) {
93 		if (strlen(mod_name)) {
94 			rc = request_module(mod_name);
95 			if (rc != 0) {
96 				pr_warn("Unable to request_module for %s\n",
97 					mod_name);
98 				rc = 0;
99 			}
100 		}
101 
102 		tpg_np_new = iscsit_tpg_add_network_portal(tpg,
103 					&np->np_sockaddr, tpg_np, type);
104 		if (IS_ERR(tpg_np_new)) {
105 			rc = PTR_ERR(tpg_np_new);
106 			goto out;
107 		}
108 	} else {
109 		tpg_np_new = iscsit_tpg_locate_child_np(tpg_np, type);
110 		if (tpg_np_new) {
111 			rc = iscsit_tpg_del_network_portal(tpg, tpg_np_new);
112 			if (rc < 0)
113 				goto out;
114 		}
115 	}
116 
117 	iscsit_put_tpg(tpg);
118 	return count;
119 out:
120 	iscsit_put_tpg(tpg);
121 	return rc;
122 }
123 
124 static ssize_t lio_target_np_iser_show(struct config_item *item, char *page)
125 {
126 	return lio_target_np_driver_show(item, page, ISCSI_INFINIBAND);
127 }
128 
129 static ssize_t lio_target_np_iser_store(struct config_item *item,
130 					const char *page, size_t count)
131 {
132 	return lio_target_np_driver_store(item, page, count,
133 					  ISCSI_INFINIBAND, "ib_isert");
134 }
135 CONFIGFS_ATTR(lio_target_np_, iser);
136 
137 static ssize_t lio_target_np_cxgbit_show(struct config_item *item, char *page)
138 {
139 	return lio_target_np_driver_show(item, page, ISCSI_CXGBIT);
140 }
141 
142 static ssize_t lio_target_np_cxgbit_store(struct config_item *item,
143 					  const char *page, size_t count)
144 {
145 	return lio_target_np_driver_store(item, page, count,
146 					  ISCSI_CXGBIT, "cxgbit");
147 }
148 CONFIGFS_ATTR(lio_target_np_, cxgbit);
149 
150 static struct configfs_attribute *lio_target_portal_attrs[] = {
151 	&lio_target_np_attr_iser,
152 	&lio_target_np_attr_cxgbit,
153 	NULL,
154 };
155 
156 /* Stop items for lio_target_portal_cit */
157 
158 /* Start items for lio_target_np_cit */
159 
160 #define MAX_PORTAL_LEN		256
161 
162 static struct se_tpg_np *lio_target_call_addnptotpg(
163 	struct se_portal_group *se_tpg,
164 	struct config_group *group,
165 	const char *name)
166 {
167 	struct iscsi_portal_group *tpg;
168 	struct iscsi_tpg_np *tpg_np;
169 	char *str, *str2, *ip_str, *port_str;
170 	struct sockaddr_storage sockaddr = { };
171 	int ret;
172 	char buf[MAX_PORTAL_LEN + 1];
173 
174 	if (strlen(name) > MAX_PORTAL_LEN) {
175 		pr_err("strlen(name): %d exceeds MAX_PORTAL_LEN: %d\n",
176 			(int)strlen(name), MAX_PORTAL_LEN);
177 		return ERR_PTR(-EOVERFLOW);
178 	}
179 	memset(buf, 0, MAX_PORTAL_LEN + 1);
180 	snprintf(buf, MAX_PORTAL_LEN + 1, "%s", name);
181 
182 	str = strstr(buf, "[");
183 	if (str) {
184 		str2 = strstr(str, "]");
185 		if (!str2) {
186 			pr_err("Unable to locate trailing \"]\""
187 				" in IPv6 iSCSI network portal address\n");
188 			return ERR_PTR(-EINVAL);
189 		}
190 
191 		ip_str = str + 1; /* Skip over leading "[" */
192 		*str2 = '\0'; /* Terminate the unbracketed IPv6 address */
193 		str2++; /* Skip over the \0 */
194 
195 		port_str = strstr(str2, ":");
196 		if (!port_str) {
197 			pr_err("Unable to locate \":port\""
198 				" in IPv6 iSCSI network portal address\n");
199 			return ERR_PTR(-EINVAL);
200 		}
201 		*port_str = '\0'; /* Terminate string for IP */
202 		port_str++; /* Skip over ":" */
203 	} else {
204 		ip_str = &buf[0];
205 		port_str = strstr(ip_str, ":");
206 		if (!port_str) {
207 			pr_err("Unable to locate \":port\""
208 				" in IPv4 iSCSI network portal address\n");
209 			return ERR_PTR(-EINVAL);
210 		}
211 		*port_str = '\0'; /* Terminate string for IP */
212 		port_str++; /* Skip over ":" */
213 	}
214 
215 	ret = inet_pton_with_scope(&init_net, AF_UNSPEC, ip_str,
216 			port_str, &sockaddr);
217 	if (ret) {
218 		pr_err("malformed ip/port passed: %s\n", name);
219 		return ERR_PTR(ret);
220 	}
221 
222 	tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
223 	ret = iscsit_get_tpg(tpg);
224 	if (ret < 0)
225 		return ERR_PTR(-EINVAL);
226 
227 	pr_debug("LIO_Target_ConfigFS: REGISTER -> %s TPGT: %hu"
228 		" PORTAL: %s\n",
229 		config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
230 		tpg->tpgt, name);
231 	/*
232 	 * Assume ISCSI_TCP by default.  Other network portals for other
233 	 * iSCSI fabrics:
234 	 *
235 	 * Traditional iSCSI over SCTP (initial support)
236 	 * iSER/TCP (TODO, hardware available)
237 	 * iSER/SCTP (TODO, software emulation with osc-iwarp)
238 	 * iSER/IB (TODO, hardware available)
239 	 *
240 	 * can be enabled with attributes under
241 	 * sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
242 	 *
243 	 */
244 	tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, NULL,
245 				ISCSI_TCP);
246 	if (IS_ERR(tpg_np)) {
247 		iscsit_put_tpg(tpg);
248 		return ERR_CAST(tpg_np);
249 	}
250 	pr_debug("LIO_Target_ConfigFS: addnptotpg done!\n");
251 
252 	iscsit_put_tpg(tpg);
253 	return &tpg_np->se_tpg_np;
254 }
255 
256 static void lio_target_call_delnpfromtpg(
257 	struct se_tpg_np *se_tpg_np)
258 {
259 	struct iscsi_portal_group *tpg;
260 	struct iscsi_tpg_np *tpg_np;
261 	struct se_portal_group *se_tpg;
262 	int ret;
263 
264 	tpg_np = container_of(se_tpg_np, struct iscsi_tpg_np, se_tpg_np);
265 	tpg = tpg_np->tpg;
266 	ret = iscsit_get_tpg(tpg);
267 	if (ret < 0)
268 		return;
269 
270 	se_tpg = &tpg->tpg_se_tpg;
271 	pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
272 		" PORTAL: %pISpc\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
273 		tpg->tpgt, &tpg_np->tpg_np->np_sockaddr);
274 
275 	ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
276 	if (ret < 0)
277 		goto out;
278 
279 	pr_debug("LIO_Target_ConfigFS: delnpfromtpg done!\n");
280 out:
281 	iscsit_put_tpg(tpg);
282 }
283 
284 /* End items for lio_target_np_cit */
285 
286 /* Start items for lio_target_nacl_attrib_cit */
287 
288 #define ISCSI_NACL_ATTR(name)						\
289 static ssize_t iscsi_nacl_attrib_##name##_show(struct config_item *item,\
290 		char *page)						\
291 {									\
292 	struct se_node_acl *se_nacl = attrib_to_nacl(item);		\
293 	struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
294 					se_node_acl);			\
295 									\
296 	return sprintf(page, "%u\n", nacl->node_attrib.name);		\
297 }									\
298 									\
299 static ssize_t iscsi_nacl_attrib_##name##_store(struct config_item *item,\
300 		const char *page, size_t count)				\
301 {									\
302 	struct se_node_acl *se_nacl = attrib_to_nacl(item);		\
303 	struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
304 					se_node_acl);			\
305 	u32 val;							\
306 	int ret;							\
307 									\
308 	ret = kstrtou32(page, 0, &val);					\
309 	if (ret)							\
310 		return ret;						\
311 	ret = iscsit_na_##name(nacl, val);				\
312 	if (ret < 0)							\
313 		return ret;						\
314 									\
315 	return count;							\
316 }									\
317 									\
318 CONFIGFS_ATTR(iscsi_nacl_attrib_, name)
319 
320 ISCSI_NACL_ATTR(dataout_timeout);
321 ISCSI_NACL_ATTR(dataout_timeout_retries);
322 ISCSI_NACL_ATTR(default_erl);
323 ISCSI_NACL_ATTR(nopin_timeout);
324 ISCSI_NACL_ATTR(nopin_response_timeout);
325 ISCSI_NACL_ATTR(random_datain_pdu_offsets);
326 ISCSI_NACL_ATTR(random_datain_seq_offsets);
327 ISCSI_NACL_ATTR(random_r2t_offsets);
328 
329 static struct configfs_attribute *lio_target_nacl_attrib_attrs[] = {
330 	&iscsi_nacl_attrib_attr_dataout_timeout,
331 	&iscsi_nacl_attrib_attr_dataout_timeout_retries,
332 	&iscsi_nacl_attrib_attr_default_erl,
333 	&iscsi_nacl_attrib_attr_nopin_timeout,
334 	&iscsi_nacl_attrib_attr_nopin_response_timeout,
335 	&iscsi_nacl_attrib_attr_random_datain_pdu_offsets,
336 	&iscsi_nacl_attrib_attr_random_datain_seq_offsets,
337 	&iscsi_nacl_attrib_attr_random_r2t_offsets,
338 	NULL,
339 };
340 
341 /* End items for lio_target_nacl_attrib_cit */
342 
343 /* Start items for lio_target_nacl_auth_cit */
344 
345 #define __DEF_NACL_AUTH_STR(prefix, name, flags)			\
346 static ssize_t __iscsi_##prefix##_##name##_show(			\
347 	struct iscsi_node_acl *nacl,					\
348 	char *page)							\
349 {									\
350 	struct iscsi_node_auth *auth = &nacl->node_auth;		\
351 									\
352 	if (!capable(CAP_SYS_ADMIN))					\
353 		return -EPERM;						\
354 	return snprintf(page, PAGE_SIZE, "%s\n", auth->name);		\
355 }									\
356 									\
357 static ssize_t __iscsi_##prefix##_##name##_store(			\
358 	struct iscsi_node_acl *nacl,					\
359 	const char *page,						\
360 	size_t count)							\
361 {									\
362 	struct iscsi_node_auth *auth = &nacl->node_auth;		\
363 									\
364 	if (!capable(CAP_SYS_ADMIN))					\
365 		return -EPERM;						\
366 	if (count >= sizeof(auth->name))				\
367 		return -EINVAL;						\
368 	snprintf(auth->name, sizeof(auth->name), "%s", page);		\
369 	if (!strncmp("NULL", auth->name, 4))				\
370 		auth->naf_flags &= ~flags;				\
371 	else								\
372 		auth->naf_flags |= flags;				\
373 									\
374 	if ((auth->naf_flags & NAF_USERID_IN_SET) &&			\
375 	    (auth->naf_flags & NAF_PASSWORD_IN_SET))			\
376 		auth->authenticate_target = 1;				\
377 	else								\
378 		auth->authenticate_target = 0;				\
379 									\
380 	return count;							\
381 }
382 
383 #define DEF_NACL_AUTH_STR(name, flags)					\
384 	__DEF_NACL_AUTH_STR(nacl_auth, name, flags)			\
385 static ssize_t iscsi_nacl_auth_##name##_show(struct config_item *item,	\
386 		char *page)						\
387 {									\
388 	struct se_node_acl *nacl = auth_to_nacl(item);			\
389 	return __iscsi_nacl_auth_##name##_show(container_of(nacl,	\
390 			struct iscsi_node_acl, se_node_acl), page);	\
391 }									\
392 static ssize_t iscsi_nacl_auth_##name##_store(struct config_item *item,	\
393 		const char *page, size_t count)				\
394 {									\
395 	struct se_node_acl *nacl = auth_to_nacl(item);			\
396 	return __iscsi_nacl_auth_##name##_store(container_of(nacl,	\
397 			struct iscsi_node_acl, se_node_acl), page, count); \
398 }									\
399 									\
400 CONFIGFS_ATTR(iscsi_nacl_auth_, name)
401 
402 /*
403  * One-way authentication userid
404  */
405 DEF_NACL_AUTH_STR(userid, NAF_USERID_SET);
406 DEF_NACL_AUTH_STR(password, NAF_PASSWORD_SET);
407 DEF_NACL_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
408 DEF_NACL_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
409 
410 #define __DEF_NACL_AUTH_INT(prefix, name)				\
411 static ssize_t __iscsi_##prefix##_##name##_show(				\
412 	struct iscsi_node_acl *nacl,					\
413 	char *page)							\
414 {									\
415 	struct iscsi_node_auth *auth = &nacl->node_auth;		\
416 									\
417 	if (!capable(CAP_SYS_ADMIN))					\
418 		return -EPERM;						\
419 									\
420 	return snprintf(page, PAGE_SIZE, "%d\n", auth->name);		\
421 }
422 
423 #define DEF_NACL_AUTH_INT(name)						\
424 	__DEF_NACL_AUTH_INT(nacl_auth, name)				\
425 static ssize_t iscsi_nacl_auth_##name##_show(struct config_item *item,	\
426 		char *page)						\
427 {									\
428 	struct se_node_acl *nacl = auth_to_nacl(item);			\
429 	return __iscsi_nacl_auth_##name##_show(container_of(nacl,	\
430 			struct iscsi_node_acl, se_node_acl), page);	\
431 }									\
432 									\
433 CONFIGFS_ATTR_RO(iscsi_nacl_auth_, name)
434 
435 DEF_NACL_AUTH_INT(authenticate_target);
436 
437 static struct configfs_attribute *lio_target_nacl_auth_attrs[] = {
438 	&iscsi_nacl_auth_attr_userid,
439 	&iscsi_nacl_auth_attr_password,
440 	&iscsi_nacl_auth_attr_authenticate_target,
441 	&iscsi_nacl_auth_attr_userid_mutual,
442 	&iscsi_nacl_auth_attr_password_mutual,
443 	NULL,
444 };
445 
446 /* End items for lio_target_nacl_auth_cit */
447 
448 /* Start items for lio_target_nacl_param_cit */
449 
450 #define ISCSI_NACL_PARAM(name)						\
451 static ssize_t iscsi_nacl_param_##name##_show(struct config_item *item,	\
452 		char *page)						\
453 {									\
454 	struct se_node_acl *se_nacl = param_to_nacl(item);		\
455 	struct iscsi_session *sess;					\
456 	struct se_session *se_sess;					\
457 	ssize_t rb;							\
458 									\
459 	spin_lock_bh(&se_nacl->nacl_sess_lock);				\
460 	se_sess = se_nacl->nacl_sess;					\
461 	if (!se_sess) {							\
462 		rb = snprintf(page, PAGE_SIZE,				\
463 			"No Active iSCSI Session\n");			\
464 	} else {							\
465 		sess = se_sess->fabric_sess_ptr;			\
466 		rb = snprintf(page, PAGE_SIZE, "%u\n",			\
467 			(u32)sess->sess_ops->name);			\
468 	}								\
469 	spin_unlock_bh(&se_nacl->nacl_sess_lock);			\
470 									\
471 	return rb;							\
472 }									\
473 									\
474 CONFIGFS_ATTR_RO(iscsi_nacl_param_, name)
475 
476 ISCSI_NACL_PARAM(MaxConnections);
477 ISCSI_NACL_PARAM(InitialR2T);
478 ISCSI_NACL_PARAM(ImmediateData);
479 ISCSI_NACL_PARAM(MaxBurstLength);
480 ISCSI_NACL_PARAM(FirstBurstLength);
481 ISCSI_NACL_PARAM(DefaultTime2Wait);
482 ISCSI_NACL_PARAM(DefaultTime2Retain);
483 ISCSI_NACL_PARAM(MaxOutstandingR2T);
484 ISCSI_NACL_PARAM(DataPDUInOrder);
485 ISCSI_NACL_PARAM(DataSequenceInOrder);
486 ISCSI_NACL_PARAM(ErrorRecoveryLevel);
487 
488 static struct configfs_attribute *lio_target_nacl_param_attrs[] = {
489 	&iscsi_nacl_param_attr_MaxConnections,
490 	&iscsi_nacl_param_attr_InitialR2T,
491 	&iscsi_nacl_param_attr_ImmediateData,
492 	&iscsi_nacl_param_attr_MaxBurstLength,
493 	&iscsi_nacl_param_attr_FirstBurstLength,
494 	&iscsi_nacl_param_attr_DefaultTime2Wait,
495 	&iscsi_nacl_param_attr_DefaultTime2Retain,
496 	&iscsi_nacl_param_attr_MaxOutstandingR2T,
497 	&iscsi_nacl_param_attr_DataPDUInOrder,
498 	&iscsi_nacl_param_attr_DataSequenceInOrder,
499 	&iscsi_nacl_param_attr_ErrorRecoveryLevel,
500 	NULL,
501 };
502 
503 /* End items for lio_target_nacl_param_cit */
504 
505 /* Start items for lio_target_acl_cit */
506 
507 static ssize_t lio_target_nacl_info_show(struct config_item *item, char *page)
508 {
509 	struct se_node_acl *se_nacl = acl_to_nacl(item);
510 	struct iscsi_session *sess;
511 	struct iscsi_conn *conn;
512 	struct se_session *se_sess;
513 	ssize_t rb = 0;
514 	u32 max_cmd_sn;
515 
516 	spin_lock_bh(&se_nacl->nacl_sess_lock);
517 	se_sess = se_nacl->nacl_sess;
518 	if (!se_sess) {
519 		rb += sprintf(page+rb, "No active iSCSI Session for Initiator"
520 			" Endpoint: %s\n", se_nacl->initiatorname);
521 	} else {
522 		sess = se_sess->fabric_sess_ptr;
523 
524 		rb += sprintf(page+rb, "InitiatorName: %s\n",
525 			sess->sess_ops->InitiatorName);
526 		rb += sprintf(page+rb, "InitiatorAlias: %s\n",
527 			sess->sess_ops->InitiatorAlias);
528 
529 		rb += sprintf(page+rb,
530 			      "LIO Session ID: %u   ISID: 0x%6ph  TSIH: %hu  ",
531 			      sess->sid, sess->isid, sess->tsih);
532 		rb += sprintf(page+rb, "SessionType: %s\n",
533 				(sess->sess_ops->SessionType) ?
534 				"Discovery" : "Normal");
535 		rb += sprintf(page+rb, "Session State: ");
536 		switch (sess->session_state) {
537 		case TARG_SESS_STATE_FREE:
538 			rb += sprintf(page+rb, "TARG_SESS_FREE\n");
539 			break;
540 		case TARG_SESS_STATE_ACTIVE:
541 			rb += sprintf(page+rb, "TARG_SESS_STATE_ACTIVE\n");
542 			break;
543 		case TARG_SESS_STATE_LOGGED_IN:
544 			rb += sprintf(page+rb, "TARG_SESS_STATE_LOGGED_IN\n");
545 			break;
546 		case TARG_SESS_STATE_FAILED:
547 			rb += sprintf(page+rb, "TARG_SESS_STATE_FAILED\n");
548 			break;
549 		case TARG_SESS_STATE_IN_CONTINUE:
550 			rb += sprintf(page+rb, "TARG_SESS_STATE_IN_CONTINUE\n");
551 			break;
552 		default:
553 			rb += sprintf(page+rb, "ERROR: Unknown Session"
554 					" State!\n");
555 			break;
556 		}
557 
558 		rb += sprintf(page+rb, "---------------------[iSCSI Session"
559 				" Values]-----------------------\n");
560 		rb += sprintf(page+rb, "  CmdSN/WR  :  CmdSN/WC  :  ExpCmdSN"
561 				"  :  MaxCmdSN  :     ITT    :     TTT\n");
562 		max_cmd_sn = (u32) atomic_read(&sess->max_cmd_sn);
563 		rb += sprintf(page+rb, " 0x%08x   0x%08x   0x%08x   0x%08x"
564 				"   0x%08x   0x%08x\n",
565 			sess->cmdsn_window,
566 			(max_cmd_sn - sess->exp_cmd_sn) + 1,
567 			sess->exp_cmd_sn, max_cmd_sn,
568 			sess->init_task_tag, sess->targ_xfer_tag);
569 		rb += sprintf(page+rb, "----------------------[iSCSI"
570 				" Connections]-------------------------\n");
571 
572 		spin_lock(&sess->conn_lock);
573 		list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
574 			rb += sprintf(page+rb, "CID: %hu  Connection"
575 					" State: ", conn->cid);
576 			switch (conn->conn_state) {
577 			case TARG_CONN_STATE_FREE:
578 				rb += sprintf(page+rb,
579 					"TARG_CONN_STATE_FREE\n");
580 				break;
581 			case TARG_CONN_STATE_XPT_UP:
582 				rb += sprintf(page+rb,
583 					"TARG_CONN_STATE_XPT_UP\n");
584 				break;
585 			case TARG_CONN_STATE_IN_LOGIN:
586 				rb += sprintf(page+rb,
587 					"TARG_CONN_STATE_IN_LOGIN\n");
588 				break;
589 			case TARG_CONN_STATE_LOGGED_IN:
590 				rb += sprintf(page+rb,
591 					"TARG_CONN_STATE_LOGGED_IN\n");
592 				break;
593 			case TARG_CONN_STATE_IN_LOGOUT:
594 				rb += sprintf(page+rb,
595 					"TARG_CONN_STATE_IN_LOGOUT\n");
596 				break;
597 			case TARG_CONN_STATE_LOGOUT_REQUESTED:
598 				rb += sprintf(page+rb,
599 					"TARG_CONN_STATE_LOGOUT_REQUESTED\n");
600 				break;
601 			case TARG_CONN_STATE_CLEANUP_WAIT:
602 				rb += sprintf(page+rb,
603 					"TARG_CONN_STATE_CLEANUP_WAIT\n");
604 				break;
605 			default:
606 				rb += sprintf(page+rb,
607 					"ERROR: Unknown Connection State!\n");
608 				break;
609 			}
610 
611 			rb += sprintf(page+rb, "   Address %pISc %s", &conn->login_sockaddr,
612 				(conn->network_transport == ISCSI_TCP) ?
613 				"TCP" : "SCTP");
614 			rb += sprintf(page+rb, "  StatSN: 0x%08x\n",
615 				conn->stat_sn);
616 		}
617 		spin_unlock(&sess->conn_lock);
618 	}
619 	spin_unlock_bh(&se_nacl->nacl_sess_lock);
620 
621 	return rb;
622 }
623 
624 static ssize_t lio_target_nacl_cmdsn_depth_show(struct config_item *item,
625 		char *page)
626 {
627 	return sprintf(page, "%u\n", acl_to_nacl(item)->queue_depth);
628 }
629 
630 static ssize_t lio_target_nacl_cmdsn_depth_store(struct config_item *item,
631 		const char *page, size_t count)
632 {
633 	struct se_node_acl *se_nacl = acl_to_nacl(item);
634 	struct se_portal_group *se_tpg = se_nacl->se_tpg;
635 	struct iscsi_portal_group *tpg = container_of(se_tpg,
636 			struct iscsi_portal_group, tpg_se_tpg);
637 	struct config_item *acl_ci, *tpg_ci, *wwn_ci;
638 	u32 cmdsn_depth = 0;
639 	int ret;
640 
641 	ret = kstrtou32(page, 0, &cmdsn_depth);
642 	if (ret)
643 		return ret;
644 	if (cmdsn_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
645 		pr_err("Passed cmdsn_depth: %u exceeds"
646 			" TA_DEFAULT_CMDSN_DEPTH_MAX: %u\n", cmdsn_depth,
647 			TA_DEFAULT_CMDSN_DEPTH_MAX);
648 		return -EINVAL;
649 	}
650 	acl_ci = &se_nacl->acl_group.cg_item;
651 	if (!acl_ci) {
652 		pr_err("Unable to locatel acl_ci\n");
653 		return -EINVAL;
654 	}
655 	tpg_ci = &acl_ci->ci_parent->ci_group->cg_item;
656 	if (!tpg_ci) {
657 		pr_err("Unable to locate tpg_ci\n");
658 		return -EINVAL;
659 	}
660 	wwn_ci = &tpg_ci->ci_group->cg_item;
661 	if (!wwn_ci) {
662 		pr_err("Unable to locate config_item wwn_ci\n");
663 		return -EINVAL;
664 	}
665 
666 	if (iscsit_get_tpg(tpg) < 0)
667 		return -EINVAL;
668 
669 	ret = core_tpg_set_initiator_node_queue_depth(se_nacl, cmdsn_depth);
670 
671 	pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
672 		"InitiatorName: %s\n", config_item_name(wwn_ci),
673 		config_item_name(tpg_ci), cmdsn_depth,
674 		config_item_name(acl_ci));
675 
676 	iscsit_put_tpg(tpg);
677 	return (!ret) ? count : (ssize_t)ret;
678 }
679 
680 static ssize_t lio_target_nacl_tag_show(struct config_item *item, char *page)
681 {
682 	return snprintf(page, PAGE_SIZE, "%s", acl_to_nacl(item)->acl_tag);
683 }
684 
685 static ssize_t lio_target_nacl_tag_store(struct config_item *item,
686 		const char *page, size_t count)
687 {
688 	struct se_node_acl *se_nacl = acl_to_nacl(item);
689 	int ret;
690 
691 	ret = core_tpg_set_initiator_node_tag(se_nacl->se_tpg, se_nacl, page);
692 
693 	if (ret < 0)
694 		return ret;
695 	return count;
696 }
697 
698 CONFIGFS_ATTR_RO(lio_target_nacl_, info);
699 CONFIGFS_ATTR(lio_target_nacl_, cmdsn_depth);
700 CONFIGFS_ATTR(lio_target_nacl_, tag);
701 
702 static struct configfs_attribute *lio_target_initiator_attrs[] = {
703 	&lio_target_nacl_attr_info,
704 	&lio_target_nacl_attr_cmdsn_depth,
705 	&lio_target_nacl_attr_tag,
706 	NULL,
707 };
708 
709 static int lio_target_init_nodeacl(struct se_node_acl *se_nacl,
710 		const char *name)
711 {
712 	struct iscsi_node_acl *acl =
713 		container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
714 
715 	config_group_init_type_name(&acl->node_stat_grps.iscsi_sess_stats_group,
716 			"iscsi_sess_stats", &iscsi_stat_sess_cit);
717 	configfs_add_default_group(&acl->node_stat_grps.iscsi_sess_stats_group,
718 			&se_nacl->acl_fabric_stat_group);
719 	return 0;
720 }
721 
722 /* End items for lio_target_acl_cit */
723 
724 /* Start items for lio_target_tpg_attrib_cit */
725 
726 #define DEF_TPG_ATTRIB(name)						\
727 									\
728 static ssize_t iscsi_tpg_attrib_##name##_show(struct config_item *item,	\
729 		char *page)						\
730 {									\
731 	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
732 	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
733 			struct iscsi_portal_group, tpg_se_tpg);	\
734 	ssize_t rb;							\
735 									\
736 	if (iscsit_get_tpg(tpg) < 0)					\
737 		return -EINVAL;						\
738 									\
739 	rb = sprintf(page, "%u\n", tpg->tpg_attrib.name);		\
740 	iscsit_put_tpg(tpg);						\
741 	return rb;							\
742 }									\
743 									\
744 static ssize_t iscsi_tpg_attrib_##name##_store(struct config_item *item,\
745 		const char *page, size_t count)				\
746 {									\
747 	struct se_portal_group *se_tpg = attrib_to_tpg(item);		\
748 	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
749 			struct iscsi_portal_group, tpg_se_tpg);	\
750 	u32 val;							\
751 	int ret;							\
752 									\
753 	if (iscsit_get_tpg(tpg) < 0)					\
754 		return -EINVAL;						\
755 									\
756 	ret = kstrtou32(page, 0, &val);					\
757 	if (ret)							\
758 		goto out;						\
759 	ret = iscsit_ta_##name(tpg, val);				\
760 	if (ret < 0)							\
761 		goto out;						\
762 									\
763 	iscsit_put_tpg(tpg);						\
764 	return count;							\
765 out:									\
766 	iscsit_put_tpg(tpg);						\
767 	return ret;							\
768 }									\
769 CONFIGFS_ATTR(iscsi_tpg_attrib_, name)
770 
771 DEF_TPG_ATTRIB(authentication);
772 DEF_TPG_ATTRIB(login_timeout);
773 DEF_TPG_ATTRIB(netif_timeout);
774 DEF_TPG_ATTRIB(generate_node_acls);
775 DEF_TPG_ATTRIB(default_cmdsn_depth);
776 DEF_TPG_ATTRIB(cache_dynamic_acls);
777 DEF_TPG_ATTRIB(demo_mode_write_protect);
778 DEF_TPG_ATTRIB(prod_mode_write_protect);
779 DEF_TPG_ATTRIB(demo_mode_discovery);
780 DEF_TPG_ATTRIB(default_erl);
781 DEF_TPG_ATTRIB(t10_pi);
782 DEF_TPG_ATTRIB(fabric_prot_type);
783 DEF_TPG_ATTRIB(tpg_enabled_sendtargets);
784 DEF_TPG_ATTRIB(login_keys_workaround);
785 
786 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
787 	&iscsi_tpg_attrib_attr_authentication,
788 	&iscsi_tpg_attrib_attr_login_timeout,
789 	&iscsi_tpg_attrib_attr_netif_timeout,
790 	&iscsi_tpg_attrib_attr_generate_node_acls,
791 	&iscsi_tpg_attrib_attr_default_cmdsn_depth,
792 	&iscsi_tpg_attrib_attr_cache_dynamic_acls,
793 	&iscsi_tpg_attrib_attr_demo_mode_write_protect,
794 	&iscsi_tpg_attrib_attr_prod_mode_write_protect,
795 	&iscsi_tpg_attrib_attr_demo_mode_discovery,
796 	&iscsi_tpg_attrib_attr_default_erl,
797 	&iscsi_tpg_attrib_attr_t10_pi,
798 	&iscsi_tpg_attrib_attr_fabric_prot_type,
799 	&iscsi_tpg_attrib_attr_tpg_enabled_sendtargets,
800 	&iscsi_tpg_attrib_attr_login_keys_workaround,
801 	NULL,
802 };
803 
804 /* End items for lio_target_tpg_attrib_cit */
805 
806 /* Start items for lio_target_tpg_auth_cit */
807 
808 #define __DEF_TPG_AUTH_STR(prefix, name, flags)					\
809 static ssize_t __iscsi_##prefix##_##name##_show(struct se_portal_group *se_tpg,	\
810 		char *page)							\
811 {										\
812 	struct iscsi_portal_group *tpg = container_of(se_tpg,			\
813 				struct iscsi_portal_group, tpg_se_tpg);		\
814 	struct iscsi_node_auth *auth = &tpg->tpg_demo_auth;			\
815 										\
816 	if (!capable(CAP_SYS_ADMIN))						\
817 		return -EPERM;							\
818 										\
819 	return snprintf(page, PAGE_SIZE, "%s\n", auth->name);			\
820 }										\
821 										\
822 static ssize_t __iscsi_##prefix##_##name##_store(struct se_portal_group *se_tpg,\
823 		const char *page, size_t count)					\
824 {										\
825 	struct iscsi_portal_group *tpg = container_of(se_tpg,			\
826 				struct iscsi_portal_group, tpg_se_tpg);		\
827 	struct iscsi_node_auth *auth = &tpg->tpg_demo_auth;			\
828 										\
829 	if (!capable(CAP_SYS_ADMIN))						\
830 		return -EPERM;							\
831 										\
832 	snprintf(auth->name, sizeof(auth->name), "%s", page);			\
833 	if (!(strncmp("NULL", auth->name, 4)))					\
834 		auth->naf_flags &= ~flags;					\
835 	else									\
836 		auth->naf_flags |= flags;					\
837 										\
838 	if ((auth->naf_flags & NAF_USERID_IN_SET) &&				\
839 	    (auth->naf_flags & NAF_PASSWORD_IN_SET))				\
840 		auth->authenticate_target = 1;					\
841 	else									\
842 		auth->authenticate_target = 0;					\
843 										\
844 	return count;								\
845 }
846 
847 #define DEF_TPG_AUTH_STR(name, flags)						\
848 	__DEF_TPG_AUTH_STR(tpg_auth, name, flags)				\
849 static ssize_t iscsi_tpg_auth_##name##_show(struct config_item *item,		\
850 		char *page)							\
851 {										\
852 	return __iscsi_tpg_auth_##name##_show(auth_to_tpg(item), page);		\
853 }										\
854 										\
855 static ssize_t iscsi_tpg_auth_##name##_store(struct config_item *item,		\
856 		const char *page, size_t count)					\
857 {										\
858 	return __iscsi_tpg_auth_##name##_store(auth_to_tpg(item), page, count);	\
859 }										\
860 										\
861 CONFIGFS_ATTR(iscsi_tpg_auth_, name);
862 
863 
864 DEF_TPG_AUTH_STR(userid, NAF_USERID_SET);
865 DEF_TPG_AUTH_STR(password, NAF_PASSWORD_SET);
866 DEF_TPG_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
867 DEF_TPG_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
868 
869 #define __DEF_TPG_AUTH_INT(prefix, name)					\
870 static ssize_t __iscsi_##prefix##_##name##_show(struct se_portal_group *se_tpg,	\
871 		char *page)								\
872 {										\
873 	struct iscsi_portal_group *tpg = container_of(se_tpg,			\
874 				struct iscsi_portal_group, tpg_se_tpg);		\
875 	struct iscsi_node_auth *auth = &tpg->tpg_demo_auth;			\
876 										\
877 	if (!capable(CAP_SYS_ADMIN))						\
878 		return -EPERM;							\
879 										\
880 	return snprintf(page, PAGE_SIZE, "%d\n", auth->name);			\
881 }
882 
883 #define DEF_TPG_AUTH_INT(name)							\
884 	__DEF_TPG_AUTH_INT(tpg_auth, name)					\
885 static ssize_t iscsi_tpg_auth_##name##_show(struct config_item *item,		\
886 		char *page) \
887 {										\
888 	return __iscsi_tpg_auth_##name##_show(auth_to_tpg(item), page);		\
889 }										\
890 CONFIGFS_ATTR_RO(iscsi_tpg_auth_, name);
891 
892 DEF_TPG_AUTH_INT(authenticate_target);
893 
894 static struct configfs_attribute *lio_target_tpg_auth_attrs[] = {
895 	&iscsi_tpg_auth_attr_userid,
896 	&iscsi_tpg_auth_attr_password,
897 	&iscsi_tpg_auth_attr_authenticate_target,
898 	&iscsi_tpg_auth_attr_userid_mutual,
899 	&iscsi_tpg_auth_attr_password_mutual,
900 	NULL,
901 };
902 
903 /* End items for lio_target_tpg_auth_cit */
904 
905 /* Start items for lio_target_tpg_param_cit */
906 
907 #define DEF_TPG_PARAM(name)						\
908 static ssize_t iscsi_tpg_param_##name##_show(struct config_item *item,	\
909 		char *page)						\
910 {									\
911 	struct se_portal_group *se_tpg = param_to_tpg(item);		\
912 	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
913 			struct iscsi_portal_group, tpg_se_tpg);		\
914 	struct iscsi_param *param;					\
915 	ssize_t rb;							\
916 									\
917 	if (iscsit_get_tpg(tpg) < 0)					\
918 		return -EINVAL;						\
919 									\
920 	param = iscsi_find_param_from_key(__stringify(name),		\
921 				tpg->param_list);			\
922 	if (!param) {							\
923 		iscsit_put_tpg(tpg);					\
924 		return -EINVAL;						\
925 	}								\
926 	rb = snprintf(page, PAGE_SIZE, "%s\n", param->value);		\
927 									\
928 	iscsit_put_tpg(tpg);						\
929 	return rb;							\
930 }									\
931 static ssize_t iscsi_tpg_param_##name##_store(struct config_item *item, \
932 		const char *page, size_t count)				\
933 {									\
934 	struct se_portal_group *se_tpg = param_to_tpg(item);		\
935 	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
936 			struct iscsi_portal_group, tpg_se_tpg);		\
937 	char *buf;							\
938 	int ret, len;							\
939 									\
940 	buf = kzalloc(PAGE_SIZE, GFP_KERNEL);				\
941 	if (!buf)							\
942 		return -ENOMEM;						\
943 	len = snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page);	\
944 	if (isspace(buf[len-1]))					\
945 		buf[len-1] = '\0'; /* Kill newline */			\
946 									\
947 	if (iscsit_get_tpg(tpg) < 0) {					\
948 		kfree(buf);						\
949 		return -EINVAL;						\
950 	}								\
951 									\
952 	ret = iscsi_change_param_value(buf, tpg->param_list, 1);	\
953 	if (ret < 0)							\
954 		goto out;						\
955 									\
956 	kfree(buf);							\
957 	iscsit_put_tpg(tpg);						\
958 	return count;							\
959 out:									\
960 	kfree(buf);							\
961 	iscsit_put_tpg(tpg);						\
962 	return -EINVAL;							\
963 }									\
964 CONFIGFS_ATTR(iscsi_tpg_param_, name)
965 
966 DEF_TPG_PARAM(AuthMethod);
967 DEF_TPG_PARAM(HeaderDigest);
968 DEF_TPG_PARAM(DataDigest);
969 DEF_TPG_PARAM(MaxConnections);
970 DEF_TPG_PARAM(TargetAlias);
971 DEF_TPG_PARAM(InitialR2T);
972 DEF_TPG_PARAM(ImmediateData);
973 DEF_TPG_PARAM(MaxRecvDataSegmentLength);
974 DEF_TPG_PARAM(MaxXmitDataSegmentLength);
975 DEF_TPG_PARAM(MaxBurstLength);
976 DEF_TPG_PARAM(FirstBurstLength);
977 DEF_TPG_PARAM(DefaultTime2Wait);
978 DEF_TPG_PARAM(DefaultTime2Retain);
979 DEF_TPG_PARAM(MaxOutstandingR2T);
980 DEF_TPG_PARAM(DataPDUInOrder);
981 DEF_TPG_PARAM(DataSequenceInOrder);
982 DEF_TPG_PARAM(ErrorRecoveryLevel);
983 DEF_TPG_PARAM(IFMarker);
984 DEF_TPG_PARAM(OFMarker);
985 DEF_TPG_PARAM(IFMarkInt);
986 DEF_TPG_PARAM(OFMarkInt);
987 
988 static struct configfs_attribute *lio_target_tpg_param_attrs[] = {
989 	&iscsi_tpg_param_attr_AuthMethod,
990 	&iscsi_tpg_param_attr_HeaderDigest,
991 	&iscsi_tpg_param_attr_DataDigest,
992 	&iscsi_tpg_param_attr_MaxConnections,
993 	&iscsi_tpg_param_attr_TargetAlias,
994 	&iscsi_tpg_param_attr_InitialR2T,
995 	&iscsi_tpg_param_attr_ImmediateData,
996 	&iscsi_tpg_param_attr_MaxRecvDataSegmentLength,
997 	&iscsi_tpg_param_attr_MaxXmitDataSegmentLength,
998 	&iscsi_tpg_param_attr_MaxBurstLength,
999 	&iscsi_tpg_param_attr_FirstBurstLength,
1000 	&iscsi_tpg_param_attr_DefaultTime2Wait,
1001 	&iscsi_tpg_param_attr_DefaultTime2Retain,
1002 	&iscsi_tpg_param_attr_MaxOutstandingR2T,
1003 	&iscsi_tpg_param_attr_DataPDUInOrder,
1004 	&iscsi_tpg_param_attr_DataSequenceInOrder,
1005 	&iscsi_tpg_param_attr_ErrorRecoveryLevel,
1006 	&iscsi_tpg_param_attr_IFMarker,
1007 	&iscsi_tpg_param_attr_OFMarker,
1008 	&iscsi_tpg_param_attr_IFMarkInt,
1009 	&iscsi_tpg_param_attr_OFMarkInt,
1010 	NULL,
1011 };
1012 
1013 /* End items for lio_target_tpg_param_cit */
1014 
1015 /* Start items for lio_target_tpg_cit */
1016 
1017 static ssize_t lio_target_tpg_enable_show(struct config_item *item, char *page)
1018 {
1019 	struct se_portal_group *se_tpg = to_tpg(item);
1020 	struct iscsi_portal_group *tpg = container_of(se_tpg,
1021 			struct iscsi_portal_group, tpg_se_tpg);
1022 	ssize_t len;
1023 
1024 	spin_lock(&tpg->tpg_state_lock);
1025 	len = sprintf(page, "%d\n",
1026 			(tpg->tpg_state == TPG_STATE_ACTIVE) ? 1 : 0);
1027 	spin_unlock(&tpg->tpg_state_lock);
1028 
1029 	return len;
1030 }
1031 
1032 static ssize_t lio_target_tpg_enable_store(struct config_item *item,
1033 		const char *page, size_t count)
1034 {
1035 	struct se_portal_group *se_tpg = to_tpg(item);
1036 	struct iscsi_portal_group *tpg = container_of(se_tpg,
1037 			struct iscsi_portal_group, tpg_se_tpg);
1038 	u32 op;
1039 	int ret;
1040 
1041 	ret = kstrtou32(page, 0, &op);
1042 	if (ret)
1043 		return ret;
1044 	if ((op != 1) && (op != 0)) {
1045 		pr_err("Illegal value for tpg_enable: %u\n", op);
1046 		return -EINVAL;
1047 	}
1048 
1049 	ret = iscsit_get_tpg(tpg);
1050 	if (ret < 0)
1051 		return -EINVAL;
1052 
1053 	if (op) {
1054 		ret = iscsit_tpg_enable_portal_group(tpg);
1055 		if (ret < 0)
1056 			goto out;
1057 	} else {
1058 		/*
1059 		 * iscsit_tpg_disable_portal_group() assumes force=1
1060 		 */
1061 		ret = iscsit_tpg_disable_portal_group(tpg, 1);
1062 		if (ret < 0)
1063 			goto out;
1064 	}
1065 
1066 	iscsit_put_tpg(tpg);
1067 	return count;
1068 out:
1069 	iscsit_put_tpg(tpg);
1070 	return -EINVAL;
1071 }
1072 
1073 
1074 static ssize_t lio_target_tpg_dynamic_sessions_show(struct config_item *item,
1075 		char *page)
1076 {
1077 	return target_show_dynamic_sessions(to_tpg(item), page);
1078 }
1079 
1080 CONFIGFS_ATTR(lio_target_tpg_, enable);
1081 CONFIGFS_ATTR_RO(lio_target_tpg_, dynamic_sessions);
1082 
1083 static struct configfs_attribute *lio_target_tpg_attrs[] = {
1084 	&lio_target_tpg_attr_enable,
1085 	&lio_target_tpg_attr_dynamic_sessions,
1086 	NULL,
1087 };
1088 
1089 /* End items for lio_target_tpg_cit */
1090 
1091 /* Start items for lio_target_tiqn_cit */
1092 
1093 static struct se_portal_group *lio_target_tiqn_addtpg(struct se_wwn *wwn,
1094 						      const char *name)
1095 {
1096 	struct iscsi_portal_group *tpg;
1097 	struct iscsi_tiqn *tiqn;
1098 	char *tpgt_str;
1099 	int ret;
1100 	u16 tpgt;
1101 
1102 	tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1103 	/*
1104 	 * Only tpgt_# directory groups can be created below
1105 	 * target/iscsi/iqn.superturodiskarry/
1106 	 */
1107 	tpgt_str = strstr(name, "tpgt_");
1108 	if (!tpgt_str) {
1109 		pr_err("Unable to locate \"tpgt_#\" directory"
1110 				" group\n");
1111 		return NULL;
1112 	}
1113 	tpgt_str += 5; /* Skip ahead of "tpgt_" */
1114 	ret = kstrtou16(tpgt_str, 0, &tpgt);
1115 	if (ret)
1116 		return NULL;
1117 
1118 	tpg = iscsit_alloc_portal_group(tiqn, tpgt);
1119 	if (!tpg)
1120 		return NULL;
1121 
1122 	ret = core_tpg_register(wwn, &tpg->tpg_se_tpg, SCSI_PROTOCOL_ISCSI);
1123 	if (ret < 0)
1124 		goto free_out;
1125 
1126 	ret = iscsit_tpg_add_portal_group(tiqn, tpg);
1127 	if (ret != 0)
1128 		goto out;
1129 
1130 	pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1131 	pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated TPG: %s\n",
1132 			name);
1133 	return &tpg->tpg_se_tpg;
1134 out:
1135 	core_tpg_deregister(&tpg->tpg_se_tpg);
1136 free_out:
1137 	kfree(tpg);
1138 	return NULL;
1139 }
1140 
1141 static void lio_target_tiqn_deltpg(struct se_portal_group *se_tpg)
1142 {
1143 	struct iscsi_portal_group *tpg;
1144 	struct iscsi_tiqn *tiqn;
1145 
1146 	tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
1147 	tiqn = tpg->tpg_tiqn;
1148 	/*
1149 	 * iscsit_tpg_del_portal_group() assumes force=1
1150 	 */
1151 	pr_debug("LIO_Target_ConfigFS: DEREGISTER -> Releasing TPG\n");
1152 	iscsit_tpg_del_portal_group(tiqn, tpg, 1);
1153 }
1154 
1155 /* End items for lio_target_tiqn_cit */
1156 
1157 /* Start LIO-Target TIQN struct contig_item lio_target_cit */
1158 
1159 static ssize_t lio_target_wwn_lio_version_show(struct config_item *item,
1160 		char *page)
1161 {
1162 	return sprintf(page, "Datera Inc. iSCSI Target "ISCSIT_VERSION"\n");
1163 }
1164 
1165 CONFIGFS_ATTR_RO(lio_target_wwn_, lio_version);
1166 
1167 static struct configfs_attribute *lio_target_wwn_attrs[] = {
1168 	&lio_target_wwn_attr_lio_version,
1169 	NULL,
1170 };
1171 
1172 static struct se_wwn *lio_target_call_coreaddtiqn(
1173 	struct target_fabric_configfs *tf,
1174 	struct config_group *group,
1175 	const char *name)
1176 {
1177 	struct iscsi_tiqn *tiqn;
1178 
1179 	tiqn = iscsit_add_tiqn((unsigned char *)name);
1180 	if (IS_ERR(tiqn))
1181 		return ERR_CAST(tiqn);
1182 
1183 	pr_debug("LIO_Target_ConfigFS: REGISTER -> %s\n", tiqn->tiqn);
1184 	pr_debug("LIO_Target_ConfigFS: REGISTER -> Allocated Node:"
1185 			" %s\n", name);
1186 	return &tiqn->tiqn_wwn;
1187 }
1188 
1189 static void lio_target_add_wwn_groups(struct se_wwn *wwn)
1190 {
1191 	struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1192 
1193 	config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_instance_group,
1194 			"iscsi_instance", &iscsi_stat_instance_cit);
1195 	configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_instance_group,
1196 			&tiqn->tiqn_wwn.fabric_stat_group);
1197 
1198 	config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
1199 			"iscsi_sess_err", &iscsi_stat_sess_err_cit);
1200 	configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_sess_err_group,
1201 			&tiqn->tiqn_wwn.fabric_stat_group);
1202 
1203 	config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
1204 			"iscsi_tgt_attr", &iscsi_stat_tgt_attr_cit);
1205 	configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_tgt_attr_group,
1206 			&tiqn->tiqn_wwn.fabric_stat_group);
1207 
1208 	config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
1209 			"iscsi_login_stats", &iscsi_stat_login_cit);
1210 	configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_login_stats_group,
1211 			&tiqn->tiqn_wwn.fabric_stat_group);
1212 
1213 	config_group_init_type_name(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
1214 			"iscsi_logout_stats", &iscsi_stat_logout_cit);
1215 	configfs_add_default_group(&tiqn->tiqn_stat_grps.iscsi_logout_stats_group,
1216 			&tiqn->tiqn_wwn.fabric_stat_group);
1217 }
1218 
1219 static void lio_target_call_coredeltiqn(
1220 	struct se_wwn *wwn)
1221 {
1222 	struct iscsi_tiqn *tiqn = container_of(wwn, struct iscsi_tiqn, tiqn_wwn);
1223 
1224 	pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s\n",
1225 			tiqn->tiqn);
1226 	iscsit_del_tiqn(tiqn);
1227 }
1228 
1229 /* End LIO-Target TIQN struct contig_lio_target_cit */
1230 
1231 /* Start lio_target_discovery_auth_cit */
1232 
1233 #define DEF_DISC_AUTH_STR(name, flags)					\
1234 	__DEF_NACL_AUTH_STR(disc, name, flags)				\
1235 static ssize_t iscsi_disc_##name##_show(struct config_item *item, char *page) \
1236 {									\
1237 	return __iscsi_disc_##name##_show(&iscsit_global->discovery_acl,\
1238 		page);							\
1239 }									\
1240 static ssize_t iscsi_disc_##name##_store(struct config_item *item,	\
1241 		const char *page, size_t count)				\
1242 {									\
1243 	return __iscsi_disc_##name##_store(&iscsit_global->discovery_acl,	\
1244 		page, count);						\
1245 									\
1246 }									\
1247 CONFIGFS_ATTR(iscsi_disc_, name)
1248 
1249 DEF_DISC_AUTH_STR(userid, NAF_USERID_SET);
1250 DEF_DISC_AUTH_STR(password, NAF_PASSWORD_SET);
1251 DEF_DISC_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
1252 DEF_DISC_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
1253 
1254 #define DEF_DISC_AUTH_INT(name)						\
1255 	__DEF_NACL_AUTH_INT(disc, name)					\
1256 static ssize_t iscsi_disc_##name##_show(struct config_item *item, char *page) \
1257 {									\
1258 	return __iscsi_disc_##name##_show(&iscsit_global->discovery_acl, \
1259 			page);						\
1260 }									\
1261 CONFIGFS_ATTR_RO(iscsi_disc_, name)
1262 
1263 DEF_DISC_AUTH_INT(authenticate_target);
1264 
1265 
1266 static ssize_t iscsi_disc_enforce_discovery_auth_show(struct config_item *item,
1267 		char *page)
1268 {
1269 	struct iscsi_node_auth *discovery_auth = &iscsit_global->discovery_acl.node_auth;
1270 
1271 	return sprintf(page, "%d\n", discovery_auth->enforce_discovery_auth);
1272 }
1273 
1274 static ssize_t iscsi_disc_enforce_discovery_auth_store(struct config_item *item,
1275 		const char *page, size_t count)
1276 {
1277 	struct iscsi_param *param;
1278 	struct iscsi_portal_group *discovery_tpg = iscsit_global->discovery_tpg;
1279 	u32 op;
1280 	int err;
1281 
1282 	err = kstrtou32(page, 0, &op);
1283 	if (err)
1284 		return -EINVAL;
1285 	if ((op != 1) && (op != 0)) {
1286 		pr_err("Illegal value for enforce_discovery_auth:"
1287 				" %u\n", op);
1288 		return -EINVAL;
1289 	}
1290 
1291 	if (!discovery_tpg) {
1292 		pr_err("iscsit_global->discovery_tpg is NULL\n");
1293 		return -EINVAL;
1294 	}
1295 
1296 	param = iscsi_find_param_from_key(AUTHMETHOD,
1297 				discovery_tpg->param_list);
1298 	if (!param)
1299 		return -EINVAL;
1300 
1301 	if (op) {
1302 		/*
1303 		 * Reset the AuthMethod key to CHAP.
1304 		 */
1305 		if (iscsi_update_param_value(param, CHAP) < 0)
1306 			return -EINVAL;
1307 
1308 		discovery_tpg->tpg_attrib.authentication = 1;
1309 		iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 1;
1310 		pr_debug("LIO-CORE[0] Successfully enabled"
1311 			" authentication enforcement for iSCSI"
1312 			" Discovery TPG\n");
1313 	} else {
1314 		/*
1315 		 * Reset the AuthMethod key to CHAP,None
1316 		 */
1317 		if (iscsi_update_param_value(param, "CHAP,None") < 0)
1318 			return -EINVAL;
1319 
1320 		discovery_tpg->tpg_attrib.authentication = 0;
1321 		iscsit_global->discovery_acl.node_auth.enforce_discovery_auth = 0;
1322 		pr_debug("LIO-CORE[0] Successfully disabled"
1323 			" authentication enforcement for iSCSI"
1324 			" Discovery TPG\n");
1325 	}
1326 
1327 	return count;
1328 }
1329 
1330 CONFIGFS_ATTR(iscsi_disc_, enforce_discovery_auth);
1331 
1332 static struct configfs_attribute *lio_target_discovery_auth_attrs[] = {
1333 	&iscsi_disc_attr_userid,
1334 	&iscsi_disc_attr_password,
1335 	&iscsi_disc_attr_authenticate_target,
1336 	&iscsi_disc_attr_userid_mutual,
1337 	&iscsi_disc_attr_password_mutual,
1338 	&iscsi_disc_attr_enforce_discovery_auth,
1339 	NULL,
1340 };
1341 
1342 /* End lio_target_discovery_auth_cit */
1343 
1344 /* Start functions for target_core_fabric_ops */
1345 
1346 static int iscsi_get_cmd_state(struct se_cmd *se_cmd)
1347 {
1348 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1349 
1350 	return cmd->i_state;
1351 }
1352 
1353 static u32 lio_sess_get_index(struct se_session *se_sess)
1354 {
1355 	struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1356 
1357 	return sess->session_index;
1358 }
1359 
1360 static u32 lio_sess_get_initiator_sid(
1361 	struct se_session *se_sess,
1362 	unsigned char *buf,
1363 	u32 size)
1364 {
1365 	struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1366 	/*
1367 	 * iSCSI Initiator Session Identifier from RFC-3720.
1368 	 */
1369 	return snprintf(buf, size, "%6phN", sess->isid);
1370 }
1371 
1372 static int lio_queue_data_in(struct se_cmd *se_cmd)
1373 {
1374 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1375 	struct iscsi_conn *conn = cmd->conn;
1376 
1377 	cmd->i_state = ISTATE_SEND_DATAIN;
1378 	return conn->conn_transport->iscsit_queue_data_in(conn, cmd);
1379 }
1380 
1381 static int lio_write_pending(struct se_cmd *se_cmd)
1382 {
1383 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1384 	struct iscsi_conn *conn = cmd->conn;
1385 
1386 	if (!cmd->immediate_data && !cmd->unsolicited_data)
1387 		return conn->conn_transport->iscsit_get_dataout(conn, cmd, false);
1388 
1389 	return 0;
1390 }
1391 
1392 static int lio_write_pending_status(struct se_cmd *se_cmd)
1393 {
1394 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1395 	int ret;
1396 
1397 	spin_lock_bh(&cmd->istate_lock);
1398 	ret = !(cmd->cmd_flags & ICF_GOT_LAST_DATAOUT);
1399 	spin_unlock_bh(&cmd->istate_lock);
1400 
1401 	return ret;
1402 }
1403 
1404 static int lio_queue_status(struct se_cmd *se_cmd)
1405 {
1406 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1407 	struct iscsi_conn *conn = cmd->conn;
1408 
1409 	cmd->i_state = ISTATE_SEND_STATUS;
1410 
1411 	if (cmd->se_cmd.scsi_status || cmd->sense_reason) {
1412 		return iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
1413 	}
1414 	return conn->conn_transport->iscsit_queue_status(conn, cmd);
1415 }
1416 
1417 static void lio_queue_tm_rsp(struct se_cmd *se_cmd)
1418 {
1419 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1420 
1421 	cmd->i_state = ISTATE_SEND_TASKMGTRSP;
1422 	iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
1423 }
1424 
1425 static void lio_aborted_task(struct se_cmd *se_cmd)
1426 {
1427 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1428 
1429 	cmd->conn->conn_transport->iscsit_aborted_task(cmd->conn, cmd);
1430 }
1431 
1432 static inline struct iscsi_portal_group *iscsi_tpg(struct se_portal_group *se_tpg)
1433 {
1434 	return container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
1435 }
1436 
1437 static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
1438 {
1439 	return iscsi_tpg(se_tpg)->tpg_tiqn->tiqn;
1440 }
1441 
1442 static u16 lio_tpg_get_tag(struct se_portal_group *se_tpg)
1443 {
1444 	return iscsi_tpg(se_tpg)->tpgt;
1445 }
1446 
1447 static u32 lio_tpg_get_default_depth(struct se_portal_group *se_tpg)
1448 {
1449 	return iscsi_tpg(se_tpg)->tpg_attrib.default_cmdsn_depth;
1450 }
1451 
1452 static int lio_tpg_check_demo_mode(struct se_portal_group *se_tpg)
1453 {
1454 	return iscsi_tpg(se_tpg)->tpg_attrib.generate_node_acls;
1455 }
1456 
1457 static int lio_tpg_check_demo_mode_cache(struct se_portal_group *se_tpg)
1458 {
1459 	return iscsi_tpg(se_tpg)->tpg_attrib.cache_dynamic_acls;
1460 }
1461 
1462 static int lio_tpg_check_demo_mode_write_protect(
1463 	struct se_portal_group *se_tpg)
1464 {
1465 	return iscsi_tpg(se_tpg)->tpg_attrib.demo_mode_write_protect;
1466 }
1467 
1468 static int lio_tpg_check_prod_mode_write_protect(
1469 	struct se_portal_group *se_tpg)
1470 {
1471 	return iscsi_tpg(se_tpg)->tpg_attrib.prod_mode_write_protect;
1472 }
1473 
1474 static int lio_tpg_check_prot_fabric_only(
1475 	struct se_portal_group *se_tpg)
1476 {
1477 	/*
1478 	 * Only report fabric_prot_type if t10_pi has also been enabled
1479 	 * for incoming ib_isert sessions.
1480 	 */
1481 	if (!iscsi_tpg(se_tpg)->tpg_attrib.t10_pi)
1482 		return 0;
1483 	return iscsi_tpg(se_tpg)->tpg_attrib.fabric_prot_type;
1484 }
1485 
1486 /*
1487  * This function calls iscsit_inc_session_usage_count() on the
1488  * struct iscsi_session in question.
1489  */
1490 static void lio_tpg_close_session(struct se_session *se_sess)
1491 {
1492 	struct iscsi_session *sess = se_sess->fabric_sess_ptr;
1493 	struct se_portal_group *se_tpg = &sess->tpg->tpg_se_tpg;
1494 
1495 	spin_lock_bh(&se_tpg->session_lock);
1496 	spin_lock(&sess->conn_lock);
1497 	if (atomic_read(&sess->session_fall_back_to_erl0) ||
1498 	    atomic_read(&sess->session_logout) ||
1499 	    (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
1500 		spin_unlock(&sess->conn_lock);
1501 		spin_unlock_bh(&se_tpg->session_lock);
1502 		return;
1503 	}
1504 	atomic_set(&sess->session_reinstatement, 1);
1505 	atomic_set(&sess->session_fall_back_to_erl0, 1);
1506 	spin_unlock(&sess->conn_lock);
1507 
1508 	iscsit_stop_time2retain_timer(sess);
1509 	spin_unlock_bh(&se_tpg->session_lock);
1510 
1511 	iscsit_stop_session(sess, 1, 1);
1512 	iscsit_close_session(sess);
1513 }
1514 
1515 static u32 lio_tpg_get_inst_index(struct se_portal_group *se_tpg)
1516 {
1517 	return iscsi_tpg(se_tpg)->tpg_tiqn->tiqn_index;
1518 }
1519 
1520 static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
1521 {
1522 	struct iscsi_node_acl *acl = container_of(se_acl, struct iscsi_node_acl,
1523 				se_node_acl);
1524 	struct se_portal_group *se_tpg = se_acl->se_tpg;
1525 	struct iscsi_portal_group *tpg = container_of(se_tpg,
1526 				struct iscsi_portal_group, tpg_se_tpg);
1527 
1528 	acl->node_attrib.nacl = acl;
1529 	iscsit_set_default_node_attribues(acl, tpg);
1530 }
1531 
1532 static int lio_check_stop_free(struct se_cmd *se_cmd)
1533 {
1534 	return target_put_sess_cmd(se_cmd);
1535 }
1536 
1537 static void lio_release_cmd(struct se_cmd *se_cmd)
1538 {
1539 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
1540 
1541 	pr_debug("Entering lio_release_cmd for se_cmd: %p\n", se_cmd);
1542 	iscsit_release_cmd(cmd);
1543 }
1544 
1545 const struct target_core_fabric_ops iscsi_ops = {
1546 	.module				= THIS_MODULE,
1547 	.fabric_alias			= "iscsi",
1548 	.fabric_name			= "iSCSI",
1549 	.node_acl_size			= sizeof(struct iscsi_node_acl),
1550 	.tpg_get_wwn			= lio_tpg_get_endpoint_wwn,
1551 	.tpg_get_tag			= lio_tpg_get_tag,
1552 	.tpg_get_default_depth		= lio_tpg_get_default_depth,
1553 	.tpg_check_demo_mode		= lio_tpg_check_demo_mode,
1554 	.tpg_check_demo_mode_cache	= lio_tpg_check_demo_mode_cache,
1555 	.tpg_check_demo_mode_write_protect =
1556 			lio_tpg_check_demo_mode_write_protect,
1557 	.tpg_check_prod_mode_write_protect =
1558 			lio_tpg_check_prod_mode_write_protect,
1559 	.tpg_check_prot_fabric_only	= &lio_tpg_check_prot_fabric_only,
1560 	.tpg_get_inst_index		= lio_tpg_get_inst_index,
1561 	.check_stop_free		= lio_check_stop_free,
1562 	.release_cmd			= lio_release_cmd,
1563 	.close_session			= lio_tpg_close_session,
1564 	.sess_get_index			= lio_sess_get_index,
1565 	.sess_get_initiator_sid		= lio_sess_get_initiator_sid,
1566 	.write_pending			= lio_write_pending,
1567 	.write_pending_status		= lio_write_pending_status,
1568 	.set_default_node_attributes	= lio_set_default_node_attributes,
1569 	.get_cmd_state			= iscsi_get_cmd_state,
1570 	.queue_data_in			= lio_queue_data_in,
1571 	.queue_status			= lio_queue_status,
1572 	.queue_tm_rsp			= lio_queue_tm_rsp,
1573 	.aborted_task			= lio_aborted_task,
1574 	.fabric_make_wwn		= lio_target_call_coreaddtiqn,
1575 	.fabric_drop_wwn		= lio_target_call_coredeltiqn,
1576 	.add_wwn_groups			= lio_target_add_wwn_groups,
1577 	.fabric_make_tpg		= lio_target_tiqn_addtpg,
1578 	.fabric_drop_tpg		= lio_target_tiqn_deltpg,
1579 	.fabric_make_np			= lio_target_call_addnptotpg,
1580 	.fabric_drop_np			= lio_target_call_delnpfromtpg,
1581 	.fabric_init_nodeacl		= lio_target_init_nodeacl,
1582 
1583 	.tfc_discovery_attrs		= lio_target_discovery_auth_attrs,
1584 	.tfc_wwn_attrs			= lio_target_wwn_attrs,
1585 	.tfc_tpg_base_attrs		= lio_target_tpg_attrs,
1586 	.tfc_tpg_attrib_attrs		= lio_target_tpg_attrib_attrs,
1587 	.tfc_tpg_auth_attrs		= lio_target_tpg_auth_attrs,
1588 	.tfc_tpg_param_attrs		= lio_target_tpg_param_attrs,
1589 	.tfc_tpg_np_base_attrs		= lio_target_portal_attrs,
1590 	.tfc_tpg_nacl_base_attrs	= lio_target_initiator_attrs,
1591 	.tfc_tpg_nacl_attrib_attrs	= lio_target_nacl_attrib_attrs,
1592 	.tfc_tpg_nacl_auth_attrs	= lio_target_nacl_auth_attrs,
1593 	.tfc_tpg_nacl_param_attrs	= lio_target_nacl_param_attrs,
1594 
1595 	.write_pending_must_be_called	= true,
1596 };
1597