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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 | 34 | #include <linux/in.h> |
c53181af | 35 | #include <linux/export.h> |
c66ac9db NB |
36 | #include <net/sock.h> |
37 | #include <net/tcp.h> | |
38 | #include <scsi/scsi.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | ||
41 | #include <target/target_core_base.h> | |
42 | #include <target/target_core_device.h> | |
43 | #include <target/target_core_tpg.h> | |
44 | #include <target/target_core_transport.h> | |
45 | #include <target/target_core_fabric_ops.h> | |
46 | ||
e26d99ae | 47 | #include "target_core_internal.h" |
e3d6f909 AG |
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 | ||
28638887 | 140 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 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) { | |
28638887 | 144 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
145 | return acl; |
146 | } | |
147 | } | |
28638887 | 148 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
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 | } | |
052605c6 NB |
301 | /* |
302 | * Here we only create demo-mode MappedLUNs from the active | |
303 | * TPG LUNs if the fabric is not explictly asking for | |
304 | * tpg_check_demo_mode_login_only() == 1. | |
305 | */ | |
306 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && | |
307 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) | |
308 | do { ; } while (0); | |
309 | else | |
310 | core_tpg_add_node_to_devs(acl, tpg); | |
c66ac9db | 311 | |
28638887 | 312 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
313 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
314 | tpg->num_node_acls++; | |
28638887 | 315 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 316 | |
6708bb27 | 317 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
318 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
319 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
320 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
321 | |
322 | return acl; | |
323 | } | |
324 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
325 | ||
326 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
327 | { | |
328 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
329 | cpu_relax(); | |
330 | } | |
331 | ||
c66ac9db NB |
332 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
333 | { | |
334 | int i, ret; | |
335 | struct se_lun *lun; | |
336 | ||
337 | spin_lock(&tpg->tpg_lun_lock); | |
338 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
339 | lun = &tpg->tpg_lun_list[i]; | |
340 | ||
341 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
342 | (lun->lun_se_dev == NULL)) | |
343 | continue; | |
344 | ||
345 | spin_unlock(&tpg->tpg_lun_lock); | |
346 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); | |
347 | spin_lock(&tpg->tpg_lun_lock); | |
348 | } | |
349 | spin_unlock(&tpg->tpg_lun_lock); | |
350 | } | |
351 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
352 | ||
353 | /* core_tpg_add_initiator_node_acl(): | |
354 | * | |
355 | * | |
356 | */ | |
357 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
358 | struct se_portal_group *tpg, | |
359 | struct se_node_acl *se_nacl, | |
360 | const char *initiatorname, | |
361 | u32 queue_depth) | |
362 | { | |
363 | struct se_node_acl *acl = NULL; | |
364 | ||
28638887 | 365 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 366 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 367 | if (acl) { |
c66ac9db NB |
368 | if (acl->dynamic_node_acl) { |
369 | acl->dynamic_node_acl = 0; | |
6708bb27 | 370 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
371 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
372 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 373 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
374 | /* |
375 | * Release the locally allocated struct se_node_acl | |
376 | * because * core_tpg_add_initiator_node_acl() returned | |
377 | * a pointer to an existing demo mode node ACL. | |
378 | */ | |
379 | if (se_nacl) | |
e3d6f909 | 380 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
381 | se_nacl); |
382 | goto done; | |
383 | } | |
384 | ||
6708bb27 | 385 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 386 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
387 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
388 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 389 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
390 | return ERR_PTR(-EEXIST); |
391 | } | |
28638887 | 392 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 393 | |
6708bb27 AG |
394 | if (!se_nacl) { |
395 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
396 | return ERR_PTR(-EINVAL); |
397 | } | |
398 | /* | |
399 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
400 | * dependent structure allocated via | |
401 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
402 | */ | |
403 | acl = se_nacl; | |
404 | ||
405 | INIT_LIST_HEAD(&acl->acl_list); | |
406 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
407 | spin_lock_init(&acl->device_list_lock); | |
408 | spin_lock_init(&acl->nacl_sess_lock); | |
409 | atomic_set(&acl->acl_pr_ref_count, 0); | |
410 | acl->queue_depth = queue_depth; | |
411 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
412 | acl->se_tpg = tpg; | |
413 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
414 | spin_lock_init(&acl->stats_lock); | |
415 | ||
e3d6f909 | 416 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
417 | |
418 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 419 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
420 | return ERR_PTR(-ENOMEM); |
421 | } | |
422 | ||
423 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
424 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 425 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
426 | return ERR_PTR(-EINVAL); |
427 | } | |
428 | ||
28638887 | 429 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
430 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
431 | tpg->num_node_acls++; | |
28638887 | 432 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
433 | |
434 | done: | |
6708bb27 | 435 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
436 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
437 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
438 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
439 | |
440 | return acl; | |
441 | } | |
442 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
443 | ||
444 | /* core_tpg_del_initiator_node_acl(): | |
445 | * | |
446 | * | |
447 | */ | |
448 | int core_tpg_del_initiator_node_acl( | |
449 | struct se_portal_group *tpg, | |
450 | struct se_node_acl *acl, | |
451 | int force) | |
452 | { | |
453 | struct se_session *sess, *sess_tmp; | |
454 | int dynamic_acl = 0; | |
455 | ||
28638887 | 456 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
457 | if (acl->dynamic_node_acl) { |
458 | acl->dynamic_node_acl = 0; | |
459 | dynamic_acl = 1; | |
460 | } | |
461 | list_del(&acl->acl_list); | |
462 | tpg->num_node_acls--; | |
28638887 | 463 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
464 | |
465 | spin_lock_bh(&tpg->session_lock); | |
466 | list_for_each_entry_safe(sess, sess_tmp, | |
467 | &tpg->tpg_sess_list, sess_list) { | |
468 | if (sess->se_node_acl != acl) | |
469 | continue; | |
470 | /* | |
471 | * Determine if the session needs to be closed by our context. | |
472 | */ | |
6708bb27 | 473 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
474 | continue; |
475 | ||
476 | spin_unlock_bh(&tpg->session_lock); | |
477 | /* | |
478 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
479 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
480 | */ | |
e3d6f909 | 481 | tpg->se_tpg_tfo->close_session(sess); |
c66ac9db NB |
482 | |
483 | spin_lock_bh(&tpg->session_lock); | |
484 | } | |
485 | spin_unlock_bh(&tpg->session_lock); | |
486 | ||
487 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
488 | core_clear_initiator_node_from_tpg(acl, tpg); |
489 | core_free_device_list_for_node(acl, tpg); | |
490 | ||
6708bb27 | 491 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
492 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
493 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
494 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
495 | |
496 | return 0; | |
497 | } | |
498 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
499 | ||
500 | /* core_tpg_set_initiator_node_queue_depth(): | |
501 | * | |
502 | * | |
503 | */ | |
504 | int core_tpg_set_initiator_node_queue_depth( | |
505 | struct se_portal_group *tpg, | |
506 | unsigned char *initiatorname, | |
507 | u32 queue_depth, | |
508 | int force) | |
509 | { | |
510 | struct se_session *sess, *init_sess = NULL; | |
511 | struct se_node_acl *acl; | |
512 | int dynamic_acl = 0; | |
513 | ||
28638887 | 514 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 515 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
516 | if (!acl) { |
517 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 518 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
519 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
520 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 521 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
522 | return -ENODEV; |
523 | } | |
524 | if (acl->dynamic_node_acl) { | |
525 | acl->dynamic_node_acl = 0; | |
526 | dynamic_acl = 1; | |
527 | } | |
28638887 | 528 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
529 | |
530 | spin_lock_bh(&tpg->session_lock); | |
531 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { | |
532 | if (sess->se_node_acl != acl) | |
533 | continue; | |
534 | ||
535 | if (!force) { | |
6708bb27 | 536 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
537 | " Initiator Node: %s while session is" |
538 | " operational. To forcefully change the queue" | |
539 | " depth and force session reinstatement" | |
540 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 541 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
c66ac9db NB |
542 | spin_unlock_bh(&tpg->session_lock); |
543 | ||
28638887 | 544 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
545 | if (dynamic_acl) |
546 | acl->dynamic_node_acl = 1; | |
28638887 | 547 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
548 | return -EEXIST; |
549 | } | |
550 | /* | |
551 | * Determine if the session needs to be closed by our context. | |
552 | */ | |
6708bb27 | 553 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
554 | continue; |
555 | ||
556 | init_sess = sess; | |
557 | break; | |
558 | } | |
559 | ||
560 | /* | |
561 | * User has requested to change the queue depth for a Initiator Node. | |
562 | * Change the value in the Node's struct se_node_acl, and call | |
563 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
564 | * | |
e3d6f909 | 565 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
566 | * reinstatement to occur if there is an active session for the |
567 | * $FABRIC_MOD Initiator Node in question. | |
568 | */ | |
569 | acl->queue_depth = queue_depth; | |
570 | ||
571 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
572 | spin_unlock_bh(&tpg->session_lock); | |
573 | /* | |
574 | * Force session reinstatement if | |
575 | * core_set_queue_depth_for_node() failed, because we assume | |
576 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 577 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
578 | */ |
579 | if (init_sess) | |
e3d6f909 | 580 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 581 | |
28638887 | 582 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
583 | if (dynamic_acl) |
584 | acl->dynamic_node_acl = 1; | |
28638887 | 585 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
586 | return -EINVAL; |
587 | } | |
588 | spin_unlock_bh(&tpg->session_lock); | |
589 | /* | |
590 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
591 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
592 | */ | |
593 | if (init_sess) | |
e3d6f909 | 594 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 595 | |
bfb9035c | 596 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 597 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
598 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
599 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 600 | |
28638887 | 601 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
602 | if (dynamic_acl) |
603 | acl->dynamic_node_acl = 1; | |
28638887 | 604 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
605 | |
606 | return 0; | |
607 | } | |
608 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
609 | ||
610 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
611 | { | |
612 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 613 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
614 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
615 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
616 | int ret; | |
617 | ||
618 | lun->unpacked_lun = 0; | |
619 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
620 | atomic_set(&lun->lun_acl_count, 0); | |
621 | init_completion(&lun->lun_shutdown_comp); | |
622 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
623 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
624 | spin_lock_init(&lun->lun_acl_lock); | |
625 | spin_lock_init(&lun->lun_cmd_lock); | |
626 | spin_lock_init(&lun->lun_sep_lock); | |
627 | ||
628 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
629 | if (ret < 0) | |
e3d6f909 | 630 | return ret; |
c66ac9db NB |
631 | |
632 | return 0; | |
633 | } | |
634 | ||
635 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
636 | { | |
637 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
638 | ||
639 | core_tpg_post_dellun(se_tpg, lun); | |
640 | } | |
641 | ||
642 | int core_tpg_register( | |
643 | struct target_core_fabric_ops *tfo, | |
644 | struct se_wwn *se_wwn, | |
645 | struct se_portal_group *se_tpg, | |
646 | void *tpg_fabric_ptr, | |
647 | int se_tpg_type) | |
648 | { | |
649 | struct se_lun *lun; | |
650 | u32 i; | |
651 | ||
652 | se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) * | |
653 | TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL); | |
6708bb27 AG |
654 | if (!se_tpg->tpg_lun_list) { |
655 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
656 | "tpg_lun_list\n"); |
657 | return -ENOMEM; | |
658 | } | |
659 | ||
660 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
661 | lun = &se_tpg->tpg_lun_list[i]; | |
662 | lun->unpacked_lun = i; | |
663 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
664 | atomic_set(&lun->lun_acl_count, 0); | |
665 | init_completion(&lun->lun_shutdown_comp); | |
666 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
667 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
668 | spin_lock_init(&lun->lun_acl_lock); | |
669 | spin_lock_init(&lun->lun_cmd_lock); | |
670 | spin_lock_init(&lun->lun_sep_lock); | |
671 | } | |
672 | ||
673 | se_tpg->se_tpg_type = se_tpg_type; | |
674 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
675 | se_tpg->se_tpg_tfo = tfo; | |
676 | se_tpg->se_tpg_wwn = se_wwn; | |
677 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
678 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 679 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
680 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
681 | spin_lock_init(&se_tpg->acl_node_lock); | |
682 | spin_lock_init(&se_tpg->session_lock); | |
683 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
684 | ||
685 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
686 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
687 | kfree(se_tpg); | |
688 | return -ENOMEM; | |
689 | } | |
690 | } | |
691 | ||
e3d6f909 AG |
692 | spin_lock_bh(&tpg_lock); |
693 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
694 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 695 | |
6708bb27 | 696 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
697 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
698 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
699 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
700 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | EXPORT_SYMBOL(core_tpg_register); | |
705 | ||
706 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
707 | { | |
e89d15ee NB |
708 | struct se_node_acl *nacl, *nacl_tmp; |
709 | ||
6708bb27 | 710 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
711 | " for endpoint: %s Portal Tag %u\n", |
712 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
713 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
714 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
715 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 716 | |
e3d6f909 AG |
717 | spin_lock_bh(&tpg_lock); |
718 | list_del(&se_tpg->se_tpg_node); | |
719 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
720 | |
721 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
722 | cpu_relax(); | |
e89d15ee NB |
723 | /* |
724 | * Release any remaining demo-mode generated se_node_acl that have | |
725 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
726 | * in transport_deregister_session(). | |
727 | */ | |
28638887 | 728 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
729 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
730 | acl_list) { | |
731 | list_del(&nacl->acl_list); | |
732 | se_tpg->num_node_acls--; | |
28638887 | 733 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
734 | |
735 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
736 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 737 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 738 | |
28638887 | 739 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 740 | } |
28638887 | 741 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
742 | |
743 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
744 | core_tpg_release_virtual_lun0(se_tpg); | |
745 | ||
746 | se_tpg->se_tpg_fabric_ptr = NULL; | |
747 | kfree(se_tpg->tpg_lun_list); | |
748 | return 0; | |
749 | } | |
750 | EXPORT_SYMBOL(core_tpg_deregister); | |
751 | ||
752 | struct se_lun *core_tpg_pre_addlun( | |
753 | struct se_portal_group *tpg, | |
754 | u32 unpacked_lun) | |
755 | { | |
756 | struct se_lun *lun; | |
757 | ||
758 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 759 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 760 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 761 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 762 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 763 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
764 | return ERR_PTR(-EOVERFLOW); |
765 | } | |
766 | ||
767 | spin_lock(&tpg->tpg_lun_lock); | |
768 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
769 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 770 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 771 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
772 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
773 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
774 | spin_unlock(&tpg->tpg_lun_lock); |
775 | return ERR_PTR(-EINVAL); | |
776 | } | |
777 | spin_unlock(&tpg->tpg_lun_lock); | |
778 | ||
779 | return lun; | |
780 | } | |
781 | ||
782 | int core_tpg_post_addlun( | |
783 | struct se_portal_group *tpg, | |
784 | struct se_lun *lun, | |
785 | u32 lun_access, | |
786 | void *lun_ptr) | |
787 | { | |
e3d6f909 AG |
788 | int ret; |
789 | ||
790 | ret = core_dev_export(lun_ptr, tpg, lun); | |
791 | if (ret < 0) | |
792 | return ret; | |
c66ac9db NB |
793 | |
794 | spin_lock(&tpg->tpg_lun_lock); | |
795 | lun->lun_access = lun_access; | |
796 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
797 | spin_unlock(&tpg->tpg_lun_lock); | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | static void core_tpg_shutdown_lun( | |
803 | struct se_portal_group *tpg, | |
804 | struct se_lun *lun) | |
805 | { | |
806 | core_clear_lun_from_tpg(lun, tpg); | |
807 | transport_clear_lun_from_sessions(lun); | |
808 | } | |
809 | ||
810 | struct se_lun *core_tpg_pre_dellun( | |
811 | struct se_portal_group *tpg, | |
812 | u32 unpacked_lun, | |
813 | int *ret) | |
814 | { | |
815 | struct se_lun *lun; | |
816 | ||
817 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 818 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 819 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 820 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 821 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 822 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
823 | return ERR_PTR(-EOVERFLOW); |
824 | } | |
825 | ||
826 | spin_lock(&tpg->tpg_lun_lock); | |
827 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
828 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 829 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 830 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
831 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
832 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
833 | spin_unlock(&tpg->tpg_lun_lock); |
834 | return ERR_PTR(-ENODEV); | |
835 | } | |
836 | spin_unlock(&tpg->tpg_lun_lock); | |
837 | ||
838 | return lun; | |
839 | } | |
840 | ||
841 | int core_tpg_post_dellun( | |
842 | struct se_portal_group *tpg, | |
843 | struct se_lun *lun) | |
844 | { | |
845 | core_tpg_shutdown_lun(tpg, lun); | |
846 | ||
847 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
848 | ||
849 | spin_lock(&tpg->tpg_lun_lock); | |
850 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
851 | spin_unlock(&tpg->tpg_lun_lock); | |
852 | ||
853 | return 0; | |
854 | } |