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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 | 118 | } |
b3fde035 | 119 | EXPORT_SYMBOL(core_tpg_get_initiator_node_acl); |
c66ac9db NB |
120 | |
121 | /* core_tpg_add_node_to_devs(): | |
122 | * | |
123 | * | |
124 | */ | |
125 | void core_tpg_add_node_to_devs( | |
126 | struct se_node_acl *acl, | |
127 | struct se_portal_group *tpg) | |
128 | { | |
129 | int i = 0; | |
130 | u32 lun_access = 0; | |
131 | struct se_lun *lun; | |
132 | struct se_device *dev; | |
133 | ||
134 | spin_lock(&tpg->tpg_lun_lock); | |
135 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 136 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
137 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
138 | continue; | |
139 | ||
140 | spin_unlock(&tpg->tpg_lun_lock); | |
141 | ||
142 | dev = lun->lun_se_dev; | |
143 | /* | |
144 | * By default in LIO-Target $FABRIC_MOD, | |
145 | * demo_mode_write_protect is ON, or READ_ONLY; | |
146 | */ | |
6708bb27 | 147 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 148 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
149 | } else { |
150 | /* | |
151 | * Allow only optical drives to issue R/W in default RO | |
152 | * demo mode. | |
153 | */ | |
e3d6f909 | 154 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
155 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
156 | else | |
157 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
158 | } | |
159 | ||
6708bb27 | 160 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 161 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
162 | tpg->se_tpg_tfo->get_fabric_name(), |
163 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
164 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
165 | "READ-WRITE" : "READ-ONLY"); | |
166 | ||
e80ac6c4 AG |
167 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
168 | lun_access, acl, tpg); | |
c66ac9db NB |
169 | spin_lock(&tpg->tpg_lun_lock); |
170 | } | |
171 | spin_unlock(&tpg->tpg_lun_lock); | |
172 | } | |
173 | ||
174 | /* core_set_queue_depth_for_node(): | |
175 | * | |
176 | * | |
177 | */ | |
178 | static int core_set_queue_depth_for_node( | |
179 | struct se_portal_group *tpg, | |
180 | struct se_node_acl *acl) | |
181 | { | |
182 | if (!acl->queue_depth) { | |
6708bb27 | 183 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 184 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
185 | acl->initiatorname); |
186 | acl->queue_depth = 1; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
4a5a75f3 JE |
192 | void array_free(void *array, int n) |
193 | { | |
194 | void **a = array; | |
195 | int i; | |
196 | ||
197 | for (i = 0; i < n; i++) | |
198 | kfree(a[i]); | |
199 | kfree(a); | |
200 | } | |
201 | ||
202 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
203 | { | |
204 | void **a; | |
205 | int i; | |
206 | ||
207 | a = kzalloc(n * sizeof(void*), flags); | |
208 | if (!a) | |
209 | return NULL; | |
210 | for (i = 0; i < n; i++) { | |
211 | a[i] = kzalloc(size, flags); | |
212 | if (!a[i]) { | |
213 | array_free(a, n); | |
214 | return NULL; | |
215 | } | |
216 | } | |
217 | return a; | |
218 | } | |
219 | ||
c66ac9db NB |
220 | /* core_create_device_list_for_node(): |
221 | * | |
222 | * | |
223 | */ | |
224 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
225 | { | |
226 | struct se_dev_entry *deve; | |
227 | int i; | |
228 | ||
f2083241 JE |
229 | nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
230 | sizeof(struct se_dev_entry), GFP_KERNEL); | |
6708bb27 AG |
231 | if (!nacl->device_list) { |
232 | pr_err("Unable to allocate memory for" | |
c66ac9db | 233 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 234 | return -ENOMEM; |
c66ac9db NB |
235 | } |
236 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 237 | deve = nacl->device_list[i]; |
c66ac9db NB |
238 | |
239 | atomic_set(&deve->ua_count, 0); | |
240 | atomic_set(&deve->pr_ref_count, 0); | |
241 | spin_lock_init(&deve->ua_lock); | |
242 | INIT_LIST_HEAD(&deve->alua_port_list); | |
243 | INIT_LIST_HEAD(&deve->ua_list); | |
244 | } | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | /* core_tpg_check_initiator_node_acl() | |
250 | * | |
251 | * | |
252 | */ | |
253 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
254 | struct se_portal_group *tpg, | |
255 | unsigned char *initiatorname) | |
256 | { | |
257 | struct se_node_acl *acl; | |
258 | ||
259 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 260 | if (acl) |
c66ac9db NB |
261 | return acl; |
262 | ||
6708bb27 | 263 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
264 | return NULL; |
265 | ||
e3d6f909 | 266 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 267 | if (!acl) |
c66ac9db NB |
268 | return NULL; |
269 | ||
270 | INIT_LIST_HEAD(&acl->acl_list); | |
271 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 272 | kref_init(&acl->acl_kref); |
01468346 | 273 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
274 | spin_lock_init(&acl->device_list_lock); |
275 | spin_lock_init(&acl->nacl_sess_lock); | |
276 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 277 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
278 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
279 | acl->se_tpg = tpg; | |
280 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
281 | spin_lock_init(&acl->stats_lock); | |
282 | acl->dynamic_node_acl = 1; | |
283 | ||
e3d6f909 | 284 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
285 | |
286 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 287 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
288 | return NULL; |
289 | } | |
290 | ||
291 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
292 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 293 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
294 | return NULL; |
295 | } | |
052605c6 NB |
296 | /* |
297 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 298 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
299 | * tpg_check_demo_mode_login_only() == 1. |
300 | */ | |
cdf88a2f AG |
301 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
302 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
052605c6 | 303 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 304 | |
28638887 | 305 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
306 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
307 | tpg->num_node_acls++; | |
28638887 | 308 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 309 | |
6708bb27 | 310 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
311 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
312 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
313 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
314 | |
315 | return acl; | |
316 | } | |
317 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
318 | ||
319 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
320 | { | |
321 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
322 | cpu_relax(); | |
323 | } | |
324 | ||
c66ac9db NB |
325 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
326 | { | |
28168905 | 327 | int i; |
c66ac9db NB |
328 | struct se_lun *lun; |
329 | ||
330 | spin_lock(&tpg->tpg_lun_lock); | |
331 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 332 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
333 | |
334 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
335 | (lun->lun_se_dev == NULL)) | |
336 | continue; | |
337 | ||
338 | spin_unlock(&tpg->tpg_lun_lock); | |
28168905 | 339 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
340 | spin_lock(&tpg->tpg_lun_lock); |
341 | } | |
342 | spin_unlock(&tpg->tpg_lun_lock); | |
343 | } | |
344 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
345 | ||
346 | /* core_tpg_add_initiator_node_acl(): | |
347 | * | |
348 | * | |
349 | */ | |
350 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
351 | struct se_portal_group *tpg, | |
352 | struct se_node_acl *se_nacl, | |
353 | const char *initiatorname, | |
354 | u32 queue_depth) | |
355 | { | |
356 | struct se_node_acl *acl = NULL; | |
357 | ||
28638887 | 358 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 359 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 360 | if (acl) { |
c66ac9db NB |
361 | if (acl->dynamic_node_acl) { |
362 | acl->dynamic_node_acl = 0; | |
6708bb27 | 363 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
364 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
365 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 366 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
367 | /* |
368 | * Release the locally allocated struct se_node_acl | |
369 | * because * core_tpg_add_initiator_node_acl() returned | |
370 | * a pointer to an existing demo mode node ACL. | |
371 | */ | |
372 | if (se_nacl) | |
e3d6f909 | 373 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
374 | se_nacl); |
375 | goto done; | |
376 | } | |
377 | ||
6708bb27 | 378 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 379 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
380 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
381 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 382 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
383 | return ERR_PTR(-EEXIST); |
384 | } | |
28638887 | 385 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 386 | |
6708bb27 AG |
387 | if (!se_nacl) { |
388 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
389 | return ERR_PTR(-EINVAL); |
390 | } | |
391 | /* | |
392 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
393 | * dependent structure allocated via | |
394 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
395 | */ | |
396 | acl = se_nacl; | |
397 | ||
398 | INIT_LIST_HEAD(&acl->acl_list); | |
399 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 400 | kref_init(&acl->acl_kref); |
01468346 | 401 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
402 | spin_lock_init(&acl->device_list_lock); |
403 | spin_lock_init(&acl->nacl_sess_lock); | |
404 | atomic_set(&acl->acl_pr_ref_count, 0); | |
405 | acl->queue_depth = queue_depth; | |
406 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
407 | acl->se_tpg = tpg; | |
408 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
409 | spin_lock_init(&acl->stats_lock); | |
410 | ||
e3d6f909 | 411 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
412 | |
413 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 414 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
415 | return ERR_PTR(-ENOMEM); |
416 | } | |
417 | ||
418 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
419 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 420 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
421 | return ERR_PTR(-EINVAL); |
422 | } | |
423 | ||
28638887 | 424 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
425 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
426 | tpg->num_node_acls++; | |
28638887 | 427 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
428 | |
429 | done: | |
6708bb27 | 430 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
431 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
432 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
433 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
434 | |
435 | return acl; | |
436 | } | |
437 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
438 | ||
439 | /* core_tpg_del_initiator_node_acl(): | |
440 | * | |
441 | * | |
442 | */ | |
443 | int core_tpg_del_initiator_node_acl( | |
444 | struct se_portal_group *tpg, | |
445 | struct se_node_acl *acl, | |
446 | int force) | |
447 | { | |
337c0607 | 448 | LIST_HEAD(sess_list); |
c66ac9db | 449 | struct se_session *sess, *sess_tmp; |
140854cb | 450 | unsigned long flags; |
28168905 | 451 | int rc; |
c66ac9db | 452 | |
28638887 | 453 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
454 | if (acl->dynamic_node_acl) { |
455 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
456 | } |
457 | list_del(&acl->acl_list); | |
458 | tpg->num_node_acls--; | |
28638887 | 459 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 460 | |
337c0607 NB |
461 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
462 | acl->acl_stop = 1; | |
463 | ||
464 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
465 | sess_acl_list) { | |
466 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
467 | continue; |
468 | ||
337c0607 NB |
469 | target_get_session(sess); |
470 | list_move(&sess->sess_acl_list, &sess_list); | |
471 | } | |
472 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
473 | ||
474 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
475 | list_del(&sess->sess_acl_list); | |
c66ac9db | 476 | |
337c0607 NB |
477 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
478 | target_put_session(sess); | |
479 | if (!rc) | |
480 | continue; | |
481 | target_put_session(sess); | |
c66ac9db | 482 | } |
337c0607 NB |
483 | target_put_nacl(acl); |
484 | /* | |
485 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
486 | * for active fabric session transport_deregister_session() callbacks. | |
487 | */ | |
488 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
489 | |
490 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
491 | core_clear_initiator_node_from_tpg(acl, tpg); |
492 | core_free_device_list_for_node(acl, tpg); | |
493 | ||
6708bb27 | 494 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
495 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
496 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
497 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
498 | |
499 | return 0; | |
500 | } | |
501 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
502 | ||
503 | /* core_tpg_set_initiator_node_queue_depth(): | |
504 | * | |
505 | * | |
506 | */ | |
507 | int core_tpg_set_initiator_node_queue_depth( | |
508 | struct se_portal_group *tpg, | |
509 | unsigned char *initiatorname, | |
510 | u32 queue_depth, | |
511 | int force) | |
512 | { | |
513 | struct se_session *sess, *init_sess = NULL; | |
514 | struct se_node_acl *acl; | |
140854cb | 515 | unsigned long flags; |
c66ac9db NB |
516 | int dynamic_acl = 0; |
517 | ||
28638887 | 518 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 519 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
520 | if (!acl) { |
521 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 522 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
523 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
524 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 525 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
526 | return -ENODEV; |
527 | } | |
528 | if (acl->dynamic_node_acl) { | |
529 | acl->dynamic_node_acl = 0; | |
530 | dynamic_acl = 1; | |
531 | } | |
28638887 | 532 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 533 | |
140854cb | 534 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
535 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
536 | if (sess->se_node_acl != acl) | |
537 | continue; | |
538 | ||
539 | if (!force) { | |
6708bb27 | 540 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
541 | " Initiator Node: %s while session is" |
542 | " operational. To forcefully change the queue" | |
543 | " depth and force session reinstatement" | |
544 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 545 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 546 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 547 | |
28638887 | 548 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
549 | if (dynamic_acl) |
550 | acl->dynamic_node_acl = 1; | |
28638887 | 551 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
552 | return -EEXIST; |
553 | } | |
554 | /* | |
555 | * Determine if the session needs to be closed by our context. | |
556 | */ | |
6708bb27 | 557 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
558 | continue; |
559 | ||
560 | init_sess = sess; | |
561 | break; | |
562 | } | |
563 | ||
564 | /* | |
565 | * User has requested to change the queue depth for a Initiator Node. | |
566 | * Change the value in the Node's struct se_node_acl, and call | |
567 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
568 | * | |
e3d6f909 | 569 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
570 | * reinstatement to occur if there is an active session for the |
571 | * $FABRIC_MOD Initiator Node in question. | |
572 | */ | |
573 | acl->queue_depth = queue_depth; | |
574 | ||
575 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 576 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
577 | /* |
578 | * Force session reinstatement if | |
579 | * core_set_queue_depth_for_node() failed, because we assume | |
580 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 581 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
582 | */ |
583 | if (init_sess) | |
e3d6f909 | 584 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 585 | |
28638887 | 586 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
587 | if (dynamic_acl) |
588 | acl->dynamic_node_acl = 1; | |
28638887 | 589 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
590 | return -EINVAL; |
591 | } | |
140854cb | 592 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
593 | /* |
594 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
595 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
596 | */ | |
597 | if (init_sess) | |
e3d6f909 | 598 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 599 | |
bfb9035c | 600 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 601 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
602 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
603 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 604 | |
28638887 | 605 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
606 | if (dynamic_acl) |
607 | acl->dynamic_node_acl = 1; | |
28638887 | 608 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
609 | |
610 | return 0; | |
611 | } | |
612 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
613 | ||
79e62fc3 AG |
614 | /* core_tpg_set_initiator_node_tag(): |
615 | * | |
616 | * Initiator nodeacl tags are not used internally, but may be used by | |
617 | * userspace to emulate aliases or groups. | |
618 | * Returns length of newly-set tag or -EINVAL. | |
619 | */ | |
620 | int core_tpg_set_initiator_node_tag( | |
621 | struct se_portal_group *tpg, | |
622 | struct se_node_acl *acl, | |
623 | const char *new_tag) | |
624 | { | |
625 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
626 | return -EINVAL; | |
627 | ||
628 | if (!strncmp("NULL", new_tag, 4)) { | |
629 | acl->acl_tag[0] = '\0'; | |
630 | return 0; | |
631 | } | |
632 | ||
633 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
634 | } | |
635 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
636 | ||
5277797d NB |
637 | static void core_tpg_lun_ref_release(struct percpu_ref *ref) |
638 | { | |
639 | struct se_lun *lun = container_of(ref, struct se_lun, lun_ref); | |
640 | ||
641 | complete(&lun->lun_ref_comp); | |
642 | } | |
643 | ||
c66ac9db NB |
644 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) |
645 | { | |
646 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 647 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
648 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
649 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
650 | int ret; | |
651 | ||
652 | lun->unpacked_lun = 0; | |
653 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
654 | atomic_set(&lun->lun_acl_count, 0); | |
655 | init_completion(&lun->lun_shutdown_comp); | |
656 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
c66ac9db | 657 | spin_lock_init(&lun->lun_acl_lock); |
c66ac9db | 658 | spin_lock_init(&lun->lun_sep_lock); |
5277797d | 659 | init_completion(&lun->lun_ref_comp); |
c66ac9db | 660 | |
5277797d | 661 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release); |
c66ac9db | 662 | if (ret < 0) |
e3d6f909 | 663 | return ret; |
c66ac9db | 664 | |
d344f8a1 | 665 | ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev); |
5277797d NB |
666 | if (ret < 0) { |
667 | percpu_ref_cancel_init(&lun->lun_ref); | |
668 | return ret; | |
669 | } | |
670 | ||
c66ac9db NB |
671 | return 0; |
672 | } | |
673 | ||
674 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
675 | { | |
676 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
677 | ||
678 | core_tpg_post_dellun(se_tpg, lun); | |
679 | } | |
680 | ||
681 | int core_tpg_register( | |
682 | struct target_core_fabric_ops *tfo, | |
683 | struct se_wwn *se_wwn, | |
684 | struct se_portal_group *se_tpg, | |
685 | void *tpg_fabric_ptr, | |
686 | int se_tpg_type) | |
687 | { | |
688 | struct se_lun *lun; | |
689 | u32 i; | |
690 | ||
4a5a75f3 JE |
691 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
692 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
693 | if (!se_tpg->tpg_lun_list) { |
694 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
695 | "tpg_lun_list\n"); |
696 | return -ENOMEM; | |
697 | } | |
698 | ||
699 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 700 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db | 701 | lun->unpacked_lun = i; |
0ff87549 | 702 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
c66ac9db NB |
703 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
704 | atomic_set(&lun->lun_acl_count, 0); | |
705 | init_completion(&lun->lun_shutdown_comp); | |
706 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
c66ac9db | 707 | spin_lock_init(&lun->lun_acl_lock); |
c66ac9db | 708 | spin_lock_init(&lun->lun_sep_lock); |
5277797d | 709 | init_completion(&lun->lun_ref_comp); |
c66ac9db NB |
710 | } |
711 | ||
712 | se_tpg->se_tpg_type = se_tpg_type; | |
713 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
714 | se_tpg->se_tpg_tfo = tfo; | |
715 | se_tpg->se_tpg_wwn = se_wwn; | |
716 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
717 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 718 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
719 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
720 | spin_lock_init(&se_tpg->acl_node_lock); | |
721 | spin_lock_init(&se_tpg->session_lock); | |
722 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
723 | ||
724 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
725 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
0fb889b8 WY |
726 | array_free(se_tpg->tpg_lun_list, |
727 | TRANSPORT_MAX_LUNS_PER_TPG); | |
c66ac9db NB |
728 | return -ENOMEM; |
729 | } | |
730 | } | |
731 | ||
e3d6f909 AG |
732 | spin_lock_bh(&tpg_lock); |
733 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
734 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 735 | |
6708bb27 | 736 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
737 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
738 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
739 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
740 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
741 | ||
742 | return 0; | |
743 | } | |
744 | EXPORT_SYMBOL(core_tpg_register); | |
745 | ||
746 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
747 | { | |
e89d15ee NB |
748 | struct se_node_acl *nacl, *nacl_tmp; |
749 | ||
6708bb27 | 750 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
751 | " for endpoint: %s Portal Tag %u\n", |
752 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
753 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
754 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
755 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 756 | |
e3d6f909 AG |
757 | spin_lock_bh(&tpg_lock); |
758 | list_del(&se_tpg->se_tpg_node); | |
759 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
760 | |
761 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
762 | cpu_relax(); | |
e89d15ee NB |
763 | /* |
764 | * Release any remaining demo-mode generated se_node_acl that have | |
765 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
766 | * in transport_deregister_session(). | |
767 | */ | |
28638887 | 768 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
769 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
770 | acl_list) { | |
771 | list_del(&nacl->acl_list); | |
772 | se_tpg->num_node_acls--; | |
28638887 | 773 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
774 | |
775 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
776 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 777 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 778 | |
28638887 | 779 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 780 | } |
28638887 | 781 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
782 | |
783 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
784 | core_tpg_release_virtual_lun0(se_tpg); | |
785 | ||
786 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 787 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
788 | return 0; |
789 | } | |
790 | EXPORT_SYMBOL(core_tpg_deregister); | |
791 | ||
d344f8a1 | 792 | struct se_lun *core_tpg_alloc_lun( |
c66ac9db NB |
793 | struct se_portal_group *tpg, |
794 | u32 unpacked_lun) | |
795 | { | |
796 | struct se_lun *lun; | |
797 | ||
798 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 799 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 800 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 801 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 802 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 803 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
804 | return ERR_PTR(-EOVERFLOW); |
805 | } | |
806 | ||
807 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 808 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 809 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 810 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 811 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
812 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
813 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
814 | spin_unlock(&tpg->tpg_lun_lock); |
815 | return ERR_PTR(-EINVAL); | |
816 | } | |
817 | spin_unlock(&tpg->tpg_lun_lock); | |
818 | ||
819 | return lun; | |
820 | } | |
821 | ||
d344f8a1 | 822 | int core_tpg_add_lun( |
c66ac9db NB |
823 | struct se_portal_group *tpg, |
824 | struct se_lun *lun, | |
825 | u32 lun_access, | |
826 | void *lun_ptr) | |
827 | { | |
e3d6f909 AG |
828 | int ret; |
829 | ||
5277797d | 830 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release); |
e3d6f909 AG |
831 | if (ret < 0) |
832 | return ret; | |
c66ac9db | 833 | |
5277797d NB |
834 | ret = core_dev_export(lun_ptr, tpg, lun); |
835 | if (ret < 0) { | |
836 | percpu_ref_cancel_init(&lun->lun_ref); | |
837 | return ret; | |
838 | } | |
839 | ||
c66ac9db NB |
840 | spin_lock(&tpg->tpg_lun_lock); |
841 | lun->lun_access = lun_access; | |
842 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
843 | spin_unlock(&tpg->tpg_lun_lock); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
c66ac9db NB |
848 | struct se_lun *core_tpg_pre_dellun( |
849 | struct se_portal_group *tpg, | |
8d9efe53 | 850 | u32 unpacked_lun) |
c66ac9db NB |
851 | { |
852 | struct se_lun *lun; | |
853 | ||
854 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 855 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 856 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 857 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 858 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 859 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
860 | return ERR_PTR(-EOVERFLOW); |
861 | } | |
862 | ||
863 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 864 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 865 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 866 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 867 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
868 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
869 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
870 | spin_unlock(&tpg->tpg_lun_lock); |
871 | return ERR_PTR(-ENODEV); | |
872 | } | |
873 | spin_unlock(&tpg->tpg_lun_lock); | |
874 | ||
875 | return lun; | |
876 | } | |
877 | ||
878 | int core_tpg_post_dellun( | |
879 | struct se_portal_group *tpg, | |
880 | struct se_lun *lun) | |
881 | { | |
4a9a6c8d NB |
882 | core_clear_lun_from_tpg(lun, tpg); |
883 | transport_clear_lun_ref(lun); | |
c66ac9db NB |
884 | |
885 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
886 | ||
887 | spin_lock(&tpg->tpg_lun_lock); | |
888 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
889 | spin_unlock(&tpg->tpg_lun_lock); | |
890 | ||
891 | return 0; | |
892 | } |