Commit | Line | Data |
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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 | * | |
4c76251e | 6 | * (c) Copyright 2002-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
26 | #include <linux/net.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/spinlock.h> | |
c66ac9db | 31 | #include <linux/in.h> |
c53181af | 32 | #include <linux/export.h> |
c66ac9db NB |
33 | #include <net/sock.h> |
34 | #include <net/tcp.h> | |
35 | #include <scsi/scsi.h> | |
36 | #include <scsi/scsi_cmnd.h> | |
37 | ||
38 | #include <target/target_core_base.h> | |
c4795fb2 CH |
39 | #include <target/target_core_backend.h> |
40 | #include <target/target_core_fabric.h> | |
c66ac9db | 41 | |
e26d99ae | 42 | #include "target_core_internal.h" |
e3d6f909 AG |
43 | |
44 | extern struct se_device *g_lun0_dev; | |
45 | ||
46 | static DEFINE_SPINLOCK(tpg_lock); | |
47 | static LIST_HEAD(tpg_list); | |
c66ac9db NB |
48 | |
49 | /* core_clear_initiator_node_from_tpg(): | |
50 | * | |
51 | * | |
52 | */ | |
53 | static void core_clear_initiator_node_from_tpg( | |
54 | struct se_node_acl *nacl, | |
55 | struct se_portal_group *tpg) | |
56 | { | |
57 | int i; | |
58 | struct se_dev_entry *deve; | |
59 | struct se_lun *lun; | |
c66ac9db NB |
60 | |
61 | spin_lock_irq(&nacl->device_list_lock); | |
62 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 63 | deve = nacl->device_list[i]; |
c66ac9db NB |
64 | |
65 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
66 | continue; | |
67 | ||
68 | if (!deve->se_lun) { | |
6708bb27 | 69 | pr_err("%s device entries device pointer is" |
c66ac9db | 70 | " NULL, but Initiator has access.\n", |
e3d6f909 | 71 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
72 | continue; |
73 | } | |
74 | ||
75 | lun = deve->se_lun; | |
76 | spin_unlock_irq(&nacl->device_list_lock); | |
e80ac6c4 AG |
77 | core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, |
78 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); | |
c66ac9db | 79 | |
c66ac9db | 80 | spin_lock_irq(&nacl->device_list_lock); |
c66ac9db NB |
81 | } |
82 | spin_unlock_irq(&nacl->device_list_lock); | |
83 | } | |
84 | ||
85 | /* __core_tpg_get_initiator_node_acl(): | |
86 | * | |
87 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling | |
88 | */ | |
89 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
90 | struct se_portal_group *tpg, | |
91 | const char *initiatorname) | |
92 | { | |
93 | struct se_node_acl *acl; | |
94 | ||
95 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 96 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
97 | return acl; |
98 | } | |
99 | ||
100 | return NULL; | |
101 | } | |
102 | ||
103 | /* core_tpg_get_initiator_node_acl(): | |
104 | * | |
105 | * | |
106 | */ | |
107 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
108 | struct se_portal_group *tpg, | |
109 | unsigned char *initiatorname) | |
110 | { | |
111 | struct se_node_acl *acl; | |
112 | ||
28638887 | 113 | spin_lock_irq(&tpg->acl_node_lock); |
fcf29481 | 114 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
28638887 | 115 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 116 | |
fcf29481 | 117 | return acl; |
c66ac9db NB |
118 | } |
119 | ||
120 | /* core_tpg_add_node_to_devs(): | |
121 | * | |
122 | * | |
123 | */ | |
124 | void core_tpg_add_node_to_devs( | |
125 | struct se_node_acl *acl, | |
126 | struct se_portal_group *tpg) | |
127 | { | |
128 | int i = 0; | |
129 | u32 lun_access = 0; | |
130 | struct se_lun *lun; | |
131 | struct se_device *dev; | |
132 | ||
133 | spin_lock(&tpg->tpg_lun_lock); | |
134 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 135 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
136 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
137 | continue; | |
138 | ||
139 | spin_unlock(&tpg->tpg_lun_lock); | |
140 | ||
141 | dev = lun->lun_se_dev; | |
142 | /* | |
143 | * By default in LIO-Target $FABRIC_MOD, | |
144 | * demo_mode_write_protect is ON, or READ_ONLY; | |
145 | */ | |
6708bb27 | 146 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 147 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
148 | } else { |
149 | /* | |
150 | * Allow only optical drives to issue R/W in default RO | |
151 | * demo mode. | |
152 | */ | |
e3d6f909 | 153 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
154 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
155 | else | |
156 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
157 | } | |
158 | ||
6708bb27 | 159 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 160 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
161 | tpg->se_tpg_tfo->get_fabric_name(), |
162 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
163 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
164 | "READ-WRITE" : "READ-ONLY"); | |
165 | ||
e80ac6c4 AG |
166 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
167 | lun_access, acl, tpg); | |
c66ac9db NB |
168 | spin_lock(&tpg->tpg_lun_lock); |
169 | } | |
170 | spin_unlock(&tpg->tpg_lun_lock); | |
171 | } | |
172 | ||
173 | /* core_set_queue_depth_for_node(): | |
174 | * | |
175 | * | |
176 | */ | |
177 | static int core_set_queue_depth_for_node( | |
178 | struct se_portal_group *tpg, | |
179 | struct se_node_acl *acl) | |
180 | { | |
181 | if (!acl->queue_depth) { | |
6708bb27 | 182 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 183 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
184 | acl->initiatorname); |
185 | acl->queue_depth = 1; | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
4a5a75f3 JE |
191 | void array_free(void *array, int n) |
192 | { | |
193 | void **a = array; | |
194 | int i; | |
195 | ||
196 | for (i = 0; i < n; i++) | |
197 | kfree(a[i]); | |
198 | kfree(a); | |
199 | } | |
200 | ||
201 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
202 | { | |
203 | void **a; | |
204 | int i; | |
205 | ||
206 | a = kzalloc(n * sizeof(void*), flags); | |
207 | if (!a) | |
208 | return NULL; | |
209 | for (i = 0; i < n; i++) { | |
210 | a[i] = kzalloc(size, flags); | |
211 | if (!a[i]) { | |
212 | array_free(a, n); | |
213 | return NULL; | |
214 | } | |
215 | } | |
216 | return a; | |
217 | } | |
218 | ||
c66ac9db NB |
219 | /* core_create_device_list_for_node(): |
220 | * | |
221 | * | |
222 | */ | |
223 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
224 | { | |
225 | struct se_dev_entry *deve; | |
226 | int i; | |
227 | ||
f2083241 JE |
228 | nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
229 | sizeof(struct se_dev_entry), GFP_KERNEL); | |
6708bb27 AG |
230 | if (!nacl->device_list) { |
231 | pr_err("Unable to allocate memory for" | |
c66ac9db | 232 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 233 | return -ENOMEM; |
c66ac9db NB |
234 | } |
235 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 236 | deve = nacl->device_list[i]; |
c66ac9db NB |
237 | |
238 | atomic_set(&deve->ua_count, 0); | |
239 | atomic_set(&deve->pr_ref_count, 0); | |
240 | spin_lock_init(&deve->ua_lock); | |
241 | INIT_LIST_HEAD(&deve->alua_port_list); | |
242 | INIT_LIST_HEAD(&deve->ua_list); | |
243 | } | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | /* core_tpg_check_initiator_node_acl() | |
249 | * | |
250 | * | |
251 | */ | |
252 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
253 | struct se_portal_group *tpg, | |
254 | unsigned char *initiatorname) | |
255 | { | |
256 | struct se_node_acl *acl; | |
257 | ||
258 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 259 | if (acl) |
c66ac9db NB |
260 | return acl; |
261 | ||
6708bb27 | 262 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
263 | return NULL; |
264 | ||
e3d6f909 | 265 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 266 | if (!acl) |
c66ac9db NB |
267 | return NULL; |
268 | ||
269 | INIT_LIST_HEAD(&acl->acl_list); | |
270 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 271 | kref_init(&acl->acl_kref); |
01468346 | 272 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
273 | spin_lock_init(&acl->device_list_lock); |
274 | spin_lock_init(&acl->nacl_sess_lock); | |
275 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 276 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
277 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
278 | acl->se_tpg = tpg; | |
279 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
280 | spin_lock_init(&acl->stats_lock); | |
281 | acl->dynamic_node_acl = 1; | |
282 | ||
e3d6f909 | 283 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
284 | |
285 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 286 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
287 | return NULL; |
288 | } | |
289 | ||
290 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
291 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 292 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
293 | return NULL; |
294 | } | |
052605c6 NB |
295 | /* |
296 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 297 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
298 | * tpg_check_demo_mode_login_only() == 1. |
299 | */ | |
cdf88a2f AG |
300 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
301 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
052605c6 | 302 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 303 | |
28638887 | 304 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
305 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
306 | tpg->num_node_acls++; | |
28638887 | 307 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 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 | { | |
28168905 | 326 | int i; |
c66ac9db NB |
327 | struct se_lun *lun; |
328 | ||
329 | spin_lock(&tpg->tpg_lun_lock); | |
330 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 331 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
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); | |
28168905 | 338 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
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 | ||
28638887 | 357 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 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); | |
28638887 | 365 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
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)); | |
28638887 | 381 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
382 | return ERR_PTR(-EEXIST); |
383 | } | |
28638887 | 384 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 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); | |
afb999ff | 399 | kref_init(&acl->acl_kref); |
01468346 | 400 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
401 | spin_lock_init(&acl->device_list_lock); |
402 | spin_lock_init(&acl->nacl_sess_lock); | |
403 | atomic_set(&acl->acl_pr_ref_count, 0); | |
404 | acl->queue_depth = queue_depth; | |
405 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
406 | acl->se_tpg = tpg; | |
407 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
408 | spin_lock_init(&acl->stats_lock); | |
409 | ||
e3d6f909 | 410 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
411 | |
412 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 413 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
414 | return ERR_PTR(-ENOMEM); |
415 | } | |
416 | ||
417 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
418 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 419 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
420 | return ERR_PTR(-EINVAL); |
421 | } | |
422 | ||
28638887 | 423 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
424 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
425 | tpg->num_node_acls++; | |
28638887 | 426 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
427 | |
428 | done: | |
6708bb27 | 429 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
430 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
431 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
432 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
433 | |
434 | return acl; | |
435 | } | |
436 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
437 | ||
438 | /* core_tpg_del_initiator_node_acl(): | |
439 | * | |
440 | * | |
441 | */ | |
442 | int core_tpg_del_initiator_node_acl( | |
443 | struct se_portal_group *tpg, | |
444 | struct se_node_acl *acl, | |
445 | int force) | |
446 | { | |
337c0607 | 447 | LIST_HEAD(sess_list); |
c66ac9db | 448 | struct se_session *sess, *sess_tmp; |
140854cb | 449 | unsigned long flags; |
28168905 | 450 | int rc; |
c66ac9db | 451 | |
28638887 | 452 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
453 | if (acl->dynamic_node_acl) { |
454 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
455 | } |
456 | list_del(&acl->acl_list); | |
457 | tpg->num_node_acls--; | |
28638887 | 458 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 459 | |
337c0607 NB |
460 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
461 | acl->acl_stop = 1; | |
462 | ||
463 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
464 | sess_acl_list) { | |
465 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
466 | continue; |
467 | ||
337c0607 NB |
468 | target_get_session(sess); |
469 | list_move(&sess->sess_acl_list, &sess_list); | |
470 | } | |
471 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
472 | ||
473 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
474 | list_del(&sess->sess_acl_list); | |
c66ac9db | 475 | |
337c0607 NB |
476 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
477 | target_put_session(sess); | |
478 | if (!rc) | |
479 | continue; | |
480 | target_put_session(sess); | |
c66ac9db | 481 | } |
337c0607 NB |
482 | target_put_nacl(acl); |
483 | /* | |
484 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
485 | * for active fabric session transport_deregister_session() callbacks. | |
486 | */ | |
487 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
488 | |
489 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
490 | core_clear_initiator_node_from_tpg(acl, tpg); |
491 | core_free_device_list_for_node(acl, tpg); | |
492 | ||
6708bb27 | 493 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
494 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
495 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
496 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
497 | |
498 | return 0; | |
499 | } | |
500 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
501 | ||
502 | /* core_tpg_set_initiator_node_queue_depth(): | |
503 | * | |
504 | * | |
505 | */ | |
506 | int core_tpg_set_initiator_node_queue_depth( | |
507 | struct se_portal_group *tpg, | |
508 | unsigned char *initiatorname, | |
509 | u32 queue_depth, | |
510 | int force) | |
511 | { | |
512 | struct se_session *sess, *init_sess = NULL; | |
513 | struct se_node_acl *acl; | |
140854cb | 514 | unsigned long flags; |
c66ac9db NB |
515 | int dynamic_acl = 0; |
516 | ||
28638887 | 517 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 518 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
519 | if (!acl) { |
520 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 521 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
522 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
523 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 524 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
525 | return -ENODEV; |
526 | } | |
527 | if (acl->dynamic_node_acl) { | |
528 | acl->dynamic_node_acl = 0; | |
529 | dynamic_acl = 1; | |
530 | } | |
28638887 | 531 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 532 | |
140854cb | 533 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
534 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
535 | if (sess->se_node_acl != acl) | |
536 | continue; | |
537 | ||
538 | if (!force) { | |
6708bb27 | 539 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
540 | " Initiator Node: %s while session is" |
541 | " operational. To forcefully change the queue" | |
542 | " depth and force session reinstatement" | |
543 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 544 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 545 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 546 | |
28638887 | 547 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
548 | if (dynamic_acl) |
549 | acl->dynamic_node_acl = 1; | |
28638887 | 550 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
551 | return -EEXIST; |
552 | } | |
553 | /* | |
554 | * Determine if the session needs to be closed by our context. | |
555 | */ | |
6708bb27 | 556 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
557 | continue; |
558 | ||
559 | init_sess = sess; | |
560 | break; | |
561 | } | |
562 | ||
563 | /* | |
564 | * User has requested to change the queue depth for a Initiator Node. | |
565 | * Change the value in the Node's struct se_node_acl, and call | |
566 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
567 | * | |
e3d6f909 | 568 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
569 | * reinstatement to occur if there is an active session for the |
570 | * $FABRIC_MOD Initiator Node in question. | |
571 | */ | |
572 | acl->queue_depth = queue_depth; | |
573 | ||
574 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 575 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
576 | /* |
577 | * Force session reinstatement if | |
578 | * core_set_queue_depth_for_node() failed, because we assume | |
579 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 580 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
581 | */ |
582 | if (init_sess) | |
e3d6f909 | 583 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 584 | |
28638887 | 585 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
586 | if (dynamic_acl) |
587 | acl->dynamic_node_acl = 1; | |
28638887 | 588 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
589 | return -EINVAL; |
590 | } | |
140854cb | 591 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
592 | /* |
593 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
594 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
595 | */ | |
596 | if (init_sess) | |
e3d6f909 | 597 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 598 | |
bfb9035c | 599 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 600 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
601 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
602 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 603 | |
28638887 | 604 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
605 | if (dynamic_acl) |
606 | acl->dynamic_node_acl = 1; | |
28638887 | 607 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
608 | |
609 | return 0; | |
610 | } | |
611 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
612 | ||
79e62fc3 AG |
613 | /* core_tpg_set_initiator_node_tag(): |
614 | * | |
615 | * Initiator nodeacl tags are not used internally, but may be used by | |
616 | * userspace to emulate aliases or groups. | |
617 | * Returns length of newly-set tag or -EINVAL. | |
618 | */ | |
619 | int core_tpg_set_initiator_node_tag( | |
620 | struct se_portal_group *tpg, | |
621 | struct se_node_acl *acl, | |
622 | const char *new_tag) | |
623 | { | |
624 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
625 | return -EINVAL; | |
626 | ||
627 | if (!strncmp("NULL", new_tag, 4)) { | |
628 | acl->acl_tag[0] = '\0'; | |
629 | return 0; | |
630 | } | |
631 | ||
632 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
633 | } | |
634 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
635 | ||
c66ac9db NB |
636 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) |
637 | { | |
638 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 639 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
640 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
641 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
642 | int ret; | |
643 | ||
644 | lun->unpacked_lun = 0; | |
645 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
646 | atomic_set(&lun->lun_acl_count, 0); | |
647 | init_completion(&lun->lun_shutdown_comp); | |
648 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
649 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
650 | spin_lock_init(&lun->lun_acl_lock); | |
651 | spin_lock_init(&lun->lun_cmd_lock); | |
652 | spin_lock_init(&lun->lun_sep_lock); | |
653 | ||
654 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
655 | if (ret < 0) | |
e3d6f909 | 656 | return ret; |
c66ac9db NB |
657 | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
662 | { | |
663 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
664 | ||
665 | core_tpg_post_dellun(se_tpg, lun); | |
666 | } | |
667 | ||
668 | int core_tpg_register( | |
669 | struct target_core_fabric_ops *tfo, | |
670 | struct se_wwn *se_wwn, | |
671 | struct se_portal_group *se_tpg, | |
672 | void *tpg_fabric_ptr, | |
673 | int se_tpg_type) | |
674 | { | |
675 | struct se_lun *lun; | |
676 | u32 i; | |
677 | ||
4a5a75f3 JE |
678 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
679 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
680 | if (!se_tpg->tpg_lun_list) { |
681 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
682 | "tpg_lun_list\n"); |
683 | return -ENOMEM; | |
684 | } | |
685 | ||
686 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 687 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db | 688 | lun->unpacked_lun = i; |
0ff87549 | 689 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
c66ac9db NB |
690 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
691 | atomic_set(&lun->lun_acl_count, 0); | |
692 | init_completion(&lun->lun_shutdown_comp); | |
693 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
694 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
695 | spin_lock_init(&lun->lun_acl_lock); | |
696 | spin_lock_init(&lun->lun_cmd_lock); | |
697 | spin_lock_init(&lun->lun_sep_lock); | |
698 | } | |
699 | ||
700 | se_tpg->se_tpg_type = se_tpg_type; | |
701 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
702 | se_tpg->se_tpg_tfo = tfo; | |
703 | se_tpg->se_tpg_wwn = se_wwn; | |
704 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
705 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 706 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
707 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
708 | spin_lock_init(&se_tpg->acl_node_lock); | |
709 | spin_lock_init(&se_tpg->session_lock); | |
710 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
711 | ||
712 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
713 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
0fb889b8 WY |
714 | array_free(se_tpg->tpg_lun_list, |
715 | TRANSPORT_MAX_LUNS_PER_TPG); | |
c66ac9db NB |
716 | return -ENOMEM; |
717 | } | |
718 | } | |
719 | ||
e3d6f909 AG |
720 | spin_lock_bh(&tpg_lock); |
721 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
722 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 723 | |
6708bb27 | 724 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
725 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
726 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
727 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
728 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
729 | ||
730 | return 0; | |
731 | } | |
732 | EXPORT_SYMBOL(core_tpg_register); | |
733 | ||
734 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
735 | { | |
e89d15ee NB |
736 | struct se_node_acl *nacl, *nacl_tmp; |
737 | ||
6708bb27 | 738 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
739 | " for endpoint: %s Portal Tag %u\n", |
740 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
741 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
742 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
743 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 744 | |
e3d6f909 AG |
745 | spin_lock_bh(&tpg_lock); |
746 | list_del(&se_tpg->se_tpg_node); | |
747 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
748 | |
749 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
750 | cpu_relax(); | |
e89d15ee NB |
751 | /* |
752 | * Release any remaining demo-mode generated se_node_acl that have | |
753 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
754 | * in transport_deregister_session(). | |
755 | */ | |
28638887 | 756 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
757 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
758 | acl_list) { | |
759 | list_del(&nacl->acl_list); | |
760 | se_tpg->num_node_acls--; | |
28638887 | 761 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
762 | |
763 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
764 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 765 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 766 | |
28638887 | 767 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 768 | } |
28638887 | 769 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
770 | |
771 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
772 | core_tpg_release_virtual_lun0(se_tpg); | |
773 | ||
774 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 775 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
776 | return 0; |
777 | } | |
778 | EXPORT_SYMBOL(core_tpg_deregister); | |
779 | ||
780 | struct se_lun *core_tpg_pre_addlun( | |
781 | struct se_portal_group *tpg, | |
782 | u32 unpacked_lun) | |
783 | { | |
784 | struct se_lun *lun; | |
785 | ||
786 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 787 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 788 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 789 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 790 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 791 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
792 | return ERR_PTR(-EOVERFLOW); |
793 | } | |
794 | ||
795 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 796 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 797 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 798 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 799 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
800 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
801 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
802 | spin_unlock(&tpg->tpg_lun_lock); |
803 | return ERR_PTR(-EINVAL); | |
804 | } | |
805 | spin_unlock(&tpg->tpg_lun_lock); | |
806 | ||
807 | return lun; | |
808 | } | |
809 | ||
810 | int core_tpg_post_addlun( | |
811 | struct se_portal_group *tpg, | |
812 | struct se_lun *lun, | |
813 | u32 lun_access, | |
814 | void *lun_ptr) | |
815 | { | |
e3d6f909 AG |
816 | int ret; |
817 | ||
818 | ret = core_dev_export(lun_ptr, tpg, lun); | |
819 | if (ret < 0) | |
820 | return ret; | |
c66ac9db NB |
821 | |
822 | spin_lock(&tpg->tpg_lun_lock); | |
823 | lun->lun_access = lun_access; | |
824 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
825 | spin_unlock(&tpg->tpg_lun_lock); | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | static void core_tpg_shutdown_lun( | |
831 | struct se_portal_group *tpg, | |
832 | struct se_lun *lun) | |
833 | { | |
834 | core_clear_lun_from_tpg(lun, tpg); | |
835 | transport_clear_lun_from_sessions(lun); | |
836 | } | |
837 | ||
838 | struct se_lun *core_tpg_pre_dellun( | |
839 | struct se_portal_group *tpg, | |
8d9efe53 | 840 | u32 unpacked_lun) |
c66ac9db NB |
841 | { |
842 | struct se_lun *lun; | |
843 | ||
844 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 845 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 846 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 847 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 848 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 849 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
850 | return ERR_PTR(-EOVERFLOW); |
851 | } | |
852 | ||
853 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 854 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 855 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 856 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 857 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
858 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
859 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
860 | spin_unlock(&tpg->tpg_lun_lock); |
861 | return ERR_PTR(-ENODEV); | |
862 | } | |
863 | spin_unlock(&tpg->tpg_lun_lock); | |
864 | ||
865 | return lun; | |
866 | } | |
867 | ||
868 | int core_tpg_post_dellun( | |
869 | struct se_portal_group *tpg, | |
870 | struct se_lun *lun) | |
871 | { | |
872 | core_tpg_shutdown_lun(tpg, lun); | |
873 | ||
874 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
875 | ||
876 | spin_lock(&tpg->tpg_lun_lock); | |
877 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
878 | spin_unlock(&tpg->tpg_lun_lock); | |
879 | ||
880 | return 0; | |
881 | } |