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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_tpg.c | |
3 | * | |
4 | * This file contains generic Target Portal Group related functions. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #include <linux/net.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/spinlock.h> | |
c66ac9db NB |
34 | #include <linux/in.h> |
35 | #include <net/sock.h> | |
36 | #include <net/tcp.h> | |
37 | #include <scsi/scsi.h> | |
38 | #include <scsi/scsi_cmnd.h> | |
39 | ||
40 | #include <target/target_core_base.h> | |
41 | #include <target/target_core_device.h> | |
42 | #include <target/target_core_tpg.h> | |
43 | #include <target/target_core_transport.h> | |
44 | #include <target/target_core_fabric_ops.h> | |
45 | ||
46 | #include "target_core_hba.h" | |
e3d6f909 AG |
47 | #include "target_core_stat.h" |
48 | ||
49 | extern struct se_device *g_lun0_dev; | |
50 | ||
51 | static DEFINE_SPINLOCK(tpg_lock); | |
52 | static LIST_HEAD(tpg_list); | |
c66ac9db NB |
53 | |
54 | /* core_clear_initiator_node_from_tpg(): | |
55 | * | |
56 | * | |
57 | */ | |
58 | static void core_clear_initiator_node_from_tpg( | |
59 | struct se_node_acl *nacl, | |
60 | struct se_portal_group *tpg) | |
61 | { | |
62 | int i; | |
63 | struct se_dev_entry *deve; | |
64 | struct se_lun *lun; | |
65 | struct se_lun_acl *acl, *acl_tmp; | |
66 | ||
67 | spin_lock_irq(&nacl->device_list_lock); | |
68 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
69 | deve = &nacl->device_list[i]; | |
70 | ||
71 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
72 | continue; | |
73 | ||
74 | if (!deve->se_lun) { | |
6708bb27 | 75 | pr_err("%s device entries device pointer is" |
c66ac9db | 76 | " NULL, but Initiator has access.\n", |
e3d6f909 | 77 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
78 | continue; |
79 | } | |
80 | ||
81 | lun = deve->se_lun; | |
82 | spin_unlock_irq(&nacl->device_list_lock); | |
83 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, | |
84 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); | |
85 | ||
86 | spin_lock(&lun->lun_acl_lock); | |
87 | list_for_each_entry_safe(acl, acl_tmp, | |
88 | &lun->lun_acl_list, lacl_list) { | |
6708bb27 AG |
89 | if (!strcmp(acl->initiatorname, nacl->initiatorname) && |
90 | (acl->mapped_lun == deve->mapped_lun)) | |
c66ac9db NB |
91 | break; |
92 | } | |
93 | ||
94 | if (!acl) { | |
6708bb27 | 95 | pr_err("Unable to locate struct se_lun_acl for %s," |
c66ac9db NB |
96 | " mapped_lun: %u\n", nacl->initiatorname, |
97 | deve->mapped_lun); | |
98 | spin_unlock(&lun->lun_acl_lock); | |
99 | spin_lock_irq(&nacl->device_list_lock); | |
100 | continue; | |
101 | } | |
102 | ||
103 | list_del(&acl->lacl_list); | |
104 | spin_unlock(&lun->lun_acl_lock); | |
105 | ||
106 | spin_lock_irq(&nacl->device_list_lock); | |
107 | kfree(acl); | |
108 | } | |
109 | spin_unlock_irq(&nacl->device_list_lock); | |
110 | } | |
111 | ||
112 | /* __core_tpg_get_initiator_node_acl(): | |
113 | * | |
114 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling | |
115 | */ | |
116 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
117 | struct se_portal_group *tpg, | |
118 | const char *initiatorname) | |
119 | { | |
120 | struct se_node_acl *acl; | |
121 | ||
122 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 123 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
124 | return acl; |
125 | } | |
126 | ||
127 | return NULL; | |
128 | } | |
129 | ||
130 | /* core_tpg_get_initiator_node_acl(): | |
131 | * | |
132 | * | |
133 | */ | |
134 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
135 | struct se_portal_group *tpg, | |
136 | unsigned char *initiatorname) | |
137 | { | |
138 | struct se_node_acl *acl; | |
139 | ||
140 | spin_lock_bh(&tpg->acl_node_lock); | |
141 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 AG |
142 | if (!strcmp(acl->initiatorname, initiatorname) && |
143 | !acl->dynamic_node_acl) { | |
c66ac9db NB |
144 | spin_unlock_bh(&tpg->acl_node_lock); |
145 | return acl; | |
146 | } | |
147 | } | |
148 | spin_unlock_bh(&tpg->acl_node_lock); | |
149 | ||
150 | return NULL; | |
151 | } | |
152 | ||
153 | /* core_tpg_add_node_to_devs(): | |
154 | * | |
155 | * | |
156 | */ | |
157 | void core_tpg_add_node_to_devs( | |
158 | struct se_node_acl *acl, | |
159 | struct se_portal_group *tpg) | |
160 | { | |
161 | int i = 0; | |
162 | u32 lun_access = 0; | |
163 | struct se_lun *lun; | |
164 | struct se_device *dev; | |
165 | ||
166 | spin_lock(&tpg->tpg_lun_lock); | |
167 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
168 | lun = &tpg->tpg_lun_list[i]; | |
169 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) | |
170 | continue; | |
171 | ||
172 | spin_unlock(&tpg->tpg_lun_lock); | |
173 | ||
174 | dev = lun->lun_se_dev; | |
175 | /* | |
176 | * By default in LIO-Target $FABRIC_MOD, | |
177 | * demo_mode_write_protect is ON, or READ_ONLY; | |
178 | */ | |
6708bb27 | 179 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
c66ac9db NB |
180 | if (dev->dev_flags & DF_READ_ONLY) |
181 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
182 | else | |
183 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
184 | } else { | |
185 | /* | |
186 | * Allow only optical drives to issue R/W in default RO | |
187 | * demo mode. | |
188 | */ | |
e3d6f909 | 189 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
190 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
191 | else | |
192 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
193 | } | |
194 | ||
6708bb27 | 195 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 196 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
197 | tpg->se_tpg_tfo->get_fabric_name(), |
198 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
199 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
200 | "READ-WRITE" : "READ-ONLY"); | |
201 | ||
202 | core_update_device_list_for_node(lun, NULL, lun->unpacked_lun, | |
203 | lun_access, acl, tpg, 1); | |
204 | spin_lock(&tpg->tpg_lun_lock); | |
205 | } | |
206 | spin_unlock(&tpg->tpg_lun_lock); | |
207 | } | |
208 | ||
209 | /* core_set_queue_depth_for_node(): | |
210 | * | |
211 | * | |
212 | */ | |
213 | static int core_set_queue_depth_for_node( | |
214 | struct se_portal_group *tpg, | |
215 | struct se_node_acl *acl) | |
216 | { | |
217 | if (!acl->queue_depth) { | |
6708bb27 | 218 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 219 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
220 | acl->initiatorname); |
221 | acl->queue_depth = 1; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | /* core_create_device_list_for_node(): | |
228 | * | |
229 | * | |
230 | */ | |
231 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
232 | { | |
233 | struct se_dev_entry *deve; | |
234 | int i; | |
235 | ||
236 | nacl->device_list = kzalloc(sizeof(struct se_dev_entry) * | |
237 | TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL); | |
6708bb27 AG |
238 | if (!nacl->device_list) { |
239 | pr_err("Unable to allocate memory for" | |
c66ac9db | 240 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 241 | return -ENOMEM; |
c66ac9db NB |
242 | } |
243 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
244 | deve = &nacl->device_list[i]; | |
245 | ||
246 | atomic_set(&deve->ua_count, 0); | |
247 | atomic_set(&deve->pr_ref_count, 0); | |
248 | spin_lock_init(&deve->ua_lock); | |
249 | INIT_LIST_HEAD(&deve->alua_port_list); | |
250 | INIT_LIST_HEAD(&deve->ua_list); | |
251 | } | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | /* core_tpg_check_initiator_node_acl() | |
257 | * | |
258 | * | |
259 | */ | |
260 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
261 | struct se_portal_group *tpg, | |
262 | unsigned char *initiatorname) | |
263 | { | |
264 | struct se_node_acl *acl; | |
265 | ||
266 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 267 | if (acl) |
c66ac9db NB |
268 | return acl; |
269 | ||
6708bb27 | 270 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
271 | return NULL; |
272 | ||
e3d6f909 | 273 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 274 | if (!acl) |
c66ac9db NB |
275 | return NULL; |
276 | ||
277 | INIT_LIST_HEAD(&acl->acl_list); | |
278 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
279 | spin_lock_init(&acl->device_list_lock); | |
280 | spin_lock_init(&acl->nacl_sess_lock); | |
281 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 282 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
283 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
284 | acl->se_tpg = tpg; | |
285 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
286 | spin_lock_init(&acl->stats_lock); | |
287 | acl->dynamic_node_acl = 1; | |
288 | ||
e3d6f909 | 289 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
290 | |
291 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 292 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
293 | return NULL; |
294 | } | |
295 | ||
296 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
297 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 298 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
299 | return NULL; |
300 | } | |
301 | ||
302 | core_tpg_add_node_to_devs(acl, tpg); | |
303 | ||
304 | spin_lock_bh(&tpg->acl_node_lock); | |
305 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); | |
306 | tpg->num_node_acls++; | |
307 | spin_unlock_bh(&tpg->acl_node_lock); | |
308 | ||
6708bb27 | 309 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
310 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
311 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
312 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
313 | |
314 | return acl; | |
315 | } | |
316 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
317 | ||
318 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
319 | { | |
320 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
321 | cpu_relax(); | |
322 | } | |
323 | ||
c66ac9db NB |
324 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
325 | { | |
326 | int i, ret; | |
327 | struct se_lun *lun; | |
328 | ||
329 | spin_lock(&tpg->tpg_lun_lock); | |
330 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
331 | lun = &tpg->tpg_lun_list[i]; | |
332 | ||
333 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
334 | (lun->lun_se_dev == NULL)) | |
335 | continue; | |
336 | ||
337 | spin_unlock(&tpg->tpg_lun_lock); | |
338 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); | |
339 | spin_lock(&tpg->tpg_lun_lock); | |
340 | } | |
341 | spin_unlock(&tpg->tpg_lun_lock); | |
342 | } | |
343 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
344 | ||
345 | /* core_tpg_add_initiator_node_acl(): | |
346 | * | |
347 | * | |
348 | */ | |
349 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
350 | struct se_portal_group *tpg, | |
351 | struct se_node_acl *se_nacl, | |
352 | const char *initiatorname, | |
353 | u32 queue_depth) | |
354 | { | |
355 | struct se_node_acl *acl = NULL; | |
356 | ||
357 | spin_lock_bh(&tpg->acl_node_lock); | |
358 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 359 | if (acl) { |
c66ac9db NB |
360 | if (acl->dynamic_node_acl) { |
361 | acl->dynamic_node_acl = 0; | |
6708bb27 | 362 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
363 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
364 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
c66ac9db NB |
365 | spin_unlock_bh(&tpg->acl_node_lock); |
366 | /* | |
367 | * Release the locally allocated struct se_node_acl | |
368 | * because * core_tpg_add_initiator_node_acl() returned | |
369 | * a pointer to an existing demo mode node ACL. | |
370 | */ | |
371 | if (se_nacl) | |
e3d6f909 | 372 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
373 | se_nacl); |
374 | goto done; | |
375 | } | |
376 | ||
6708bb27 | 377 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 378 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
379 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
380 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
381 | spin_unlock_bh(&tpg->acl_node_lock); |
382 | return ERR_PTR(-EEXIST); | |
383 | } | |
384 | spin_unlock_bh(&tpg->acl_node_lock); | |
385 | ||
6708bb27 AG |
386 | if (!se_nacl) { |
387 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
388 | return ERR_PTR(-EINVAL); |
389 | } | |
390 | /* | |
391 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
392 | * dependent structure allocated via | |
393 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
394 | */ | |
395 | acl = se_nacl; | |
396 | ||
397 | INIT_LIST_HEAD(&acl->acl_list); | |
398 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
399 | spin_lock_init(&acl->device_list_lock); | |
400 | spin_lock_init(&acl->nacl_sess_lock); | |
401 | atomic_set(&acl->acl_pr_ref_count, 0); | |
402 | acl->queue_depth = queue_depth; | |
403 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
404 | acl->se_tpg = tpg; | |
405 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
406 | spin_lock_init(&acl->stats_lock); | |
407 | ||
e3d6f909 | 408 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
409 | |
410 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 411 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
412 | return ERR_PTR(-ENOMEM); |
413 | } | |
414 | ||
415 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
416 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 417 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
418 | return ERR_PTR(-EINVAL); |
419 | } | |
420 | ||
421 | spin_lock_bh(&tpg->acl_node_lock); | |
422 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); | |
423 | tpg->num_node_acls++; | |
424 | spin_unlock_bh(&tpg->acl_node_lock); | |
425 | ||
426 | done: | |
6708bb27 | 427 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
428 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
429 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
430 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
431 | |
432 | return acl; | |
433 | } | |
434 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
435 | ||
436 | /* core_tpg_del_initiator_node_acl(): | |
437 | * | |
438 | * | |
439 | */ | |
440 | int core_tpg_del_initiator_node_acl( | |
441 | struct se_portal_group *tpg, | |
442 | struct se_node_acl *acl, | |
443 | int force) | |
444 | { | |
445 | struct se_session *sess, *sess_tmp; | |
446 | int dynamic_acl = 0; | |
447 | ||
448 | spin_lock_bh(&tpg->acl_node_lock); | |
449 | if (acl->dynamic_node_acl) { | |
450 | acl->dynamic_node_acl = 0; | |
451 | dynamic_acl = 1; | |
452 | } | |
453 | list_del(&acl->acl_list); | |
454 | tpg->num_node_acls--; | |
455 | spin_unlock_bh(&tpg->acl_node_lock); | |
456 | ||
457 | spin_lock_bh(&tpg->session_lock); | |
458 | list_for_each_entry_safe(sess, sess_tmp, | |
459 | &tpg->tpg_sess_list, sess_list) { | |
460 | if (sess->se_node_acl != acl) | |
461 | continue; | |
462 | /* | |
463 | * Determine if the session needs to be closed by our context. | |
464 | */ | |
6708bb27 | 465 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
466 | continue; |
467 | ||
468 | spin_unlock_bh(&tpg->session_lock); | |
469 | /* | |
470 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
471 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
472 | */ | |
e3d6f909 | 473 | tpg->se_tpg_tfo->close_session(sess); |
c66ac9db NB |
474 | |
475 | spin_lock_bh(&tpg->session_lock); | |
476 | } | |
477 | spin_unlock_bh(&tpg->session_lock); | |
478 | ||
479 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
480 | core_clear_initiator_node_from_tpg(acl, tpg); |
481 | core_free_device_list_for_node(acl, tpg); | |
482 | ||
6708bb27 | 483 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
484 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
485 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
486 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
487 | |
488 | return 0; | |
489 | } | |
490 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
491 | ||
492 | /* core_tpg_set_initiator_node_queue_depth(): | |
493 | * | |
494 | * | |
495 | */ | |
496 | int core_tpg_set_initiator_node_queue_depth( | |
497 | struct se_portal_group *tpg, | |
498 | unsigned char *initiatorname, | |
499 | u32 queue_depth, | |
500 | int force) | |
501 | { | |
502 | struct se_session *sess, *init_sess = NULL; | |
503 | struct se_node_acl *acl; | |
504 | int dynamic_acl = 0; | |
505 | ||
506 | spin_lock_bh(&tpg->acl_node_lock); | |
507 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 AG |
508 | if (!acl) { |
509 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 510 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
511 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
512 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
513 | spin_unlock_bh(&tpg->acl_node_lock); |
514 | return -ENODEV; | |
515 | } | |
516 | if (acl->dynamic_node_acl) { | |
517 | acl->dynamic_node_acl = 0; | |
518 | dynamic_acl = 1; | |
519 | } | |
520 | spin_unlock_bh(&tpg->acl_node_lock); | |
521 | ||
522 | spin_lock_bh(&tpg->session_lock); | |
523 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { | |
524 | if (sess->se_node_acl != acl) | |
525 | continue; | |
526 | ||
527 | if (!force) { | |
6708bb27 | 528 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
529 | " Initiator Node: %s while session is" |
530 | " operational. To forcefully change the queue" | |
531 | " depth and force session reinstatement" | |
532 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 533 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
c66ac9db NB |
534 | spin_unlock_bh(&tpg->session_lock); |
535 | ||
536 | spin_lock_bh(&tpg->acl_node_lock); | |
537 | if (dynamic_acl) | |
538 | acl->dynamic_node_acl = 1; | |
539 | spin_unlock_bh(&tpg->acl_node_lock); | |
540 | return -EEXIST; | |
541 | } | |
542 | /* | |
543 | * Determine if the session needs to be closed by our context. | |
544 | */ | |
6708bb27 | 545 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
546 | continue; |
547 | ||
548 | init_sess = sess; | |
549 | break; | |
550 | } | |
551 | ||
552 | /* | |
553 | * User has requested to change the queue depth for a Initiator Node. | |
554 | * Change the value in the Node's struct se_node_acl, and call | |
555 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
556 | * | |
e3d6f909 | 557 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
558 | * reinstatement to occur if there is an active session for the |
559 | * $FABRIC_MOD Initiator Node in question. | |
560 | */ | |
561 | acl->queue_depth = queue_depth; | |
562 | ||
563 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
564 | spin_unlock_bh(&tpg->session_lock); | |
565 | /* | |
566 | * Force session reinstatement if | |
567 | * core_set_queue_depth_for_node() failed, because we assume | |
568 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 569 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
570 | */ |
571 | if (init_sess) | |
e3d6f909 | 572 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db NB |
573 | |
574 | spin_lock_bh(&tpg->acl_node_lock); | |
575 | if (dynamic_acl) | |
576 | acl->dynamic_node_acl = 1; | |
577 | spin_unlock_bh(&tpg->acl_node_lock); | |
578 | return -EINVAL; | |
579 | } | |
580 | spin_unlock_bh(&tpg->session_lock); | |
581 | /* | |
582 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
583 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
584 | */ | |
585 | if (init_sess) | |
e3d6f909 | 586 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 587 | |
6708bb27 | 588 | pr_debug("Successfuly changed queue depth to: %d for Initiator" |
c66ac9db | 589 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
590 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
591 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
592 | |
593 | spin_lock_bh(&tpg->acl_node_lock); | |
594 | if (dynamic_acl) | |
595 | acl->dynamic_node_acl = 1; | |
596 | spin_unlock_bh(&tpg->acl_node_lock); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
601 | ||
602 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
603 | { | |
604 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 605 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
606 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
607 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
608 | int ret; | |
609 | ||
610 | lun->unpacked_lun = 0; | |
611 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
612 | atomic_set(&lun->lun_acl_count, 0); | |
613 | init_completion(&lun->lun_shutdown_comp); | |
614 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
615 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
616 | spin_lock_init(&lun->lun_acl_lock); | |
617 | spin_lock_init(&lun->lun_cmd_lock); | |
618 | spin_lock_init(&lun->lun_sep_lock); | |
619 | ||
620 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
621 | if (ret < 0) | |
e3d6f909 | 622 | return ret; |
c66ac9db NB |
623 | |
624 | return 0; | |
625 | } | |
626 | ||
627 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
628 | { | |
629 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
630 | ||
631 | core_tpg_post_dellun(se_tpg, lun); | |
632 | } | |
633 | ||
634 | int core_tpg_register( | |
635 | struct target_core_fabric_ops *tfo, | |
636 | struct se_wwn *se_wwn, | |
637 | struct se_portal_group *se_tpg, | |
638 | void *tpg_fabric_ptr, | |
639 | int se_tpg_type) | |
640 | { | |
641 | struct se_lun *lun; | |
642 | u32 i; | |
643 | ||
644 | se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) * | |
645 | TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL); | |
6708bb27 AG |
646 | if (!se_tpg->tpg_lun_list) { |
647 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
648 | "tpg_lun_list\n"); |
649 | return -ENOMEM; | |
650 | } | |
651 | ||
652 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
653 | lun = &se_tpg->tpg_lun_list[i]; | |
654 | lun->unpacked_lun = i; | |
655 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
656 | atomic_set(&lun->lun_acl_count, 0); | |
657 | init_completion(&lun->lun_shutdown_comp); | |
658 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
659 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
660 | spin_lock_init(&lun->lun_acl_lock); | |
661 | spin_lock_init(&lun->lun_cmd_lock); | |
662 | spin_lock_init(&lun->lun_sep_lock); | |
663 | } | |
664 | ||
665 | se_tpg->se_tpg_type = se_tpg_type; | |
666 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
667 | se_tpg->se_tpg_tfo = tfo; | |
668 | se_tpg->se_tpg_wwn = se_wwn; | |
669 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
670 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 671 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
672 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
673 | spin_lock_init(&se_tpg->acl_node_lock); | |
674 | spin_lock_init(&se_tpg->session_lock); | |
675 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
676 | ||
677 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
678 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
679 | kfree(se_tpg); | |
680 | return -ENOMEM; | |
681 | } | |
682 | } | |
683 | ||
e3d6f909 AG |
684 | spin_lock_bh(&tpg_lock); |
685 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
686 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 687 | |
6708bb27 | 688 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
689 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
690 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
691 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
692 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
693 | ||
694 | return 0; | |
695 | } | |
696 | EXPORT_SYMBOL(core_tpg_register); | |
697 | ||
698 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
699 | { | |
e89d15ee NB |
700 | struct se_node_acl *nacl, *nacl_tmp; |
701 | ||
6708bb27 | 702 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
703 | " for endpoint: %s Portal Tag %u\n", |
704 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
705 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
706 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
707 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 708 | |
e3d6f909 AG |
709 | spin_lock_bh(&tpg_lock); |
710 | list_del(&se_tpg->se_tpg_node); | |
711 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
712 | |
713 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
714 | cpu_relax(); | |
e89d15ee NB |
715 | /* |
716 | * Release any remaining demo-mode generated se_node_acl that have | |
717 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
718 | * in transport_deregister_session(). | |
719 | */ | |
720 | spin_lock_bh(&se_tpg->acl_node_lock); | |
721 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, | |
722 | acl_list) { | |
723 | list_del(&nacl->acl_list); | |
724 | se_tpg->num_node_acls--; | |
725 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
726 | ||
727 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
728 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 729 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee NB |
730 | |
731 | spin_lock_bh(&se_tpg->acl_node_lock); | |
732 | } | |
733 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
c66ac9db NB |
734 | |
735 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
736 | core_tpg_release_virtual_lun0(se_tpg); | |
737 | ||
738 | se_tpg->se_tpg_fabric_ptr = NULL; | |
739 | kfree(se_tpg->tpg_lun_list); | |
740 | return 0; | |
741 | } | |
742 | EXPORT_SYMBOL(core_tpg_deregister); | |
743 | ||
744 | struct se_lun *core_tpg_pre_addlun( | |
745 | struct se_portal_group *tpg, | |
746 | u32 unpacked_lun) | |
747 | { | |
748 | struct se_lun *lun; | |
749 | ||
750 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 751 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 752 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 753 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 754 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 755 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
756 | return ERR_PTR(-EOVERFLOW); |
757 | } | |
758 | ||
759 | spin_lock(&tpg->tpg_lun_lock); | |
760 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
761 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 762 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 763 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
764 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
765 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
766 | spin_unlock(&tpg->tpg_lun_lock); |
767 | return ERR_PTR(-EINVAL); | |
768 | } | |
769 | spin_unlock(&tpg->tpg_lun_lock); | |
770 | ||
771 | return lun; | |
772 | } | |
773 | ||
774 | int core_tpg_post_addlun( | |
775 | struct se_portal_group *tpg, | |
776 | struct se_lun *lun, | |
777 | u32 lun_access, | |
778 | void *lun_ptr) | |
779 | { | |
e3d6f909 AG |
780 | int ret; |
781 | ||
782 | ret = core_dev_export(lun_ptr, tpg, lun); | |
783 | if (ret < 0) | |
784 | return ret; | |
c66ac9db NB |
785 | |
786 | spin_lock(&tpg->tpg_lun_lock); | |
787 | lun->lun_access = lun_access; | |
788 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
789 | spin_unlock(&tpg->tpg_lun_lock); | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | static void core_tpg_shutdown_lun( | |
795 | struct se_portal_group *tpg, | |
796 | struct se_lun *lun) | |
797 | { | |
798 | core_clear_lun_from_tpg(lun, tpg); | |
799 | transport_clear_lun_from_sessions(lun); | |
800 | } | |
801 | ||
802 | struct se_lun *core_tpg_pre_dellun( | |
803 | struct se_portal_group *tpg, | |
804 | u32 unpacked_lun, | |
805 | int *ret) | |
806 | { | |
807 | struct se_lun *lun; | |
808 | ||
809 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 810 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 811 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 812 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 813 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 814 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
815 | return ERR_PTR(-EOVERFLOW); |
816 | } | |
817 | ||
818 | spin_lock(&tpg->tpg_lun_lock); | |
819 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
820 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 821 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 822 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
823 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
824 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
825 | spin_unlock(&tpg->tpg_lun_lock); |
826 | return ERR_PTR(-ENODEV); | |
827 | } | |
828 | spin_unlock(&tpg->tpg_lun_lock); | |
829 | ||
830 | return lun; | |
831 | } | |
832 | ||
833 | int core_tpg_post_dellun( | |
834 | struct se_portal_group *tpg, | |
835 | struct se_lun *lun) | |
836 | { | |
837 | core_tpg_shutdown_lun(tpg, lun); | |
838 | ||
839 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
840 | ||
841 | spin_lock(&tpg->tpg_lun_lock); | |
842 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
843 | spin_unlock(&tpg->tpg_lun_lock); | |
844 | ||
845 | return 0; | |
846 | } |