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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 | * | |
fd9a11d7 | 6 | * (c) Copyright 2002-2012 RisingTide Systems LLC. |
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); |
c66ac9db | 114 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
6708bb27 AG |
115 | if (!strcmp(acl->initiatorname, initiatorname) && |
116 | !acl->dynamic_node_acl) { | |
28638887 | 117 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
118 | return acl; |
119 | } | |
120 | } | |
28638887 | 121 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
122 | |
123 | return NULL; | |
124 | } | |
125 | ||
126 | /* core_tpg_add_node_to_devs(): | |
127 | * | |
128 | * | |
129 | */ | |
130 | void core_tpg_add_node_to_devs( | |
131 | struct se_node_acl *acl, | |
132 | struct se_portal_group *tpg) | |
133 | { | |
134 | int i = 0; | |
135 | u32 lun_access = 0; | |
136 | struct se_lun *lun; | |
137 | struct se_device *dev; | |
138 | ||
139 | spin_lock(&tpg->tpg_lun_lock); | |
140 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 141 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
142 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
143 | continue; | |
144 | ||
145 | spin_unlock(&tpg->tpg_lun_lock); | |
146 | ||
147 | dev = lun->lun_se_dev; | |
148 | /* | |
149 | * By default in LIO-Target $FABRIC_MOD, | |
150 | * demo_mode_write_protect is ON, or READ_ONLY; | |
151 | */ | |
6708bb27 | 152 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 153 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
154 | } else { |
155 | /* | |
156 | * Allow only optical drives to issue R/W in default RO | |
157 | * demo mode. | |
158 | */ | |
e3d6f909 | 159 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
160 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
161 | else | |
162 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
163 | } | |
164 | ||
6708bb27 | 165 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 166 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
167 | tpg->se_tpg_tfo->get_fabric_name(), |
168 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
169 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
170 | "READ-WRITE" : "READ-ONLY"); | |
171 | ||
e80ac6c4 AG |
172 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
173 | lun_access, acl, tpg); | |
c66ac9db NB |
174 | spin_lock(&tpg->tpg_lun_lock); |
175 | } | |
176 | spin_unlock(&tpg->tpg_lun_lock); | |
177 | } | |
178 | ||
179 | /* core_set_queue_depth_for_node(): | |
180 | * | |
181 | * | |
182 | */ | |
183 | static int core_set_queue_depth_for_node( | |
184 | struct se_portal_group *tpg, | |
185 | struct se_node_acl *acl) | |
186 | { | |
187 | if (!acl->queue_depth) { | |
6708bb27 | 188 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 189 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
190 | acl->initiatorname); |
191 | acl->queue_depth = 1; | |
192 | } | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
4a5a75f3 JE |
197 | void array_free(void *array, int n) |
198 | { | |
199 | void **a = array; | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < n; i++) | |
203 | kfree(a[i]); | |
204 | kfree(a); | |
205 | } | |
206 | ||
207 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
208 | { | |
209 | void **a; | |
210 | int i; | |
211 | ||
212 | a = kzalloc(n * sizeof(void*), flags); | |
213 | if (!a) | |
214 | return NULL; | |
215 | for (i = 0; i < n; i++) { | |
216 | a[i] = kzalloc(size, flags); | |
217 | if (!a[i]) { | |
218 | array_free(a, n); | |
219 | return NULL; | |
220 | } | |
221 | } | |
222 | return a; | |
223 | } | |
224 | ||
c66ac9db NB |
225 | /* core_create_device_list_for_node(): |
226 | * | |
227 | * | |
228 | */ | |
229 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
230 | { | |
231 | struct se_dev_entry *deve; | |
232 | int i; | |
233 | ||
f2083241 JE |
234 | nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
235 | sizeof(struct se_dev_entry), GFP_KERNEL); | |
6708bb27 AG |
236 | if (!nacl->device_list) { |
237 | pr_err("Unable to allocate memory for" | |
c66ac9db | 238 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 239 | return -ENOMEM; |
c66ac9db NB |
240 | } |
241 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 242 | deve = nacl->device_list[i]; |
c66ac9db NB |
243 | |
244 | atomic_set(&deve->ua_count, 0); | |
245 | atomic_set(&deve->pr_ref_count, 0); | |
246 | spin_lock_init(&deve->ua_lock); | |
247 | INIT_LIST_HEAD(&deve->alua_port_list); | |
248 | INIT_LIST_HEAD(&deve->ua_list); | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | /* core_tpg_check_initiator_node_acl() | |
255 | * | |
256 | * | |
257 | */ | |
258 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
259 | struct se_portal_group *tpg, | |
260 | unsigned char *initiatorname) | |
261 | { | |
262 | struct se_node_acl *acl; | |
263 | ||
264 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 265 | if (acl) |
c66ac9db NB |
266 | return acl; |
267 | ||
6708bb27 | 268 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
269 | return NULL; |
270 | ||
e3d6f909 | 271 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 272 | if (!acl) |
c66ac9db NB |
273 | return NULL; |
274 | ||
275 | INIT_LIST_HEAD(&acl->acl_list); | |
276 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 277 | kref_init(&acl->acl_kref); |
01468346 | 278 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
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 | |
35d1efe8 | 303 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
304 | * tpg_check_demo_mode_login_only() == 1. |
305 | */ | |
cdf88a2f AG |
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)) | |
052605c6 | 308 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 309 | |
28638887 | 310 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
311 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
312 | tpg->num_node_acls++; | |
28638887 | 313 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 314 | |
6708bb27 | 315 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
316 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
317 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
318 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
319 | |
320 | return acl; | |
321 | } | |
322 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
323 | ||
324 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
325 | { | |
326 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
327 | cpu_relax(); | |
328 | } | |
329 | ||
c66ac9db NB |
330 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
331 | { | |
28168905 | 332 | int i; |
c66ac9db NB |
333 | struct se_lun *lun; |
334 | ||
335 | spin_lock(&tpg->tpg_lun_lock); | |
336 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 337 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
338 | |
339 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
340 | (lun->lun_se_dev == NULL)) | |
341 | continue; | |
342 | ||
343 | spin_unlock(&tpg->tpg_lun_lock); | |
28168905 | 344 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
345 | spin_lock(&tpg->tpg_lun_lock); |
346 | } | |
347 | spin_unlock(&tpg->tpg_lun_lock); | |
348 | } | |
349 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
350 | ||
351 | /* core_tpg_add_initiator_node_acl(): | |
352 | * | |
353 | * | |
354 | */ | |
355 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
356 | struct se_portal_group *tpg, | |
357 | struct se_node_acl *se_nacl, | |
358 | const char *initiatorname, | |
359 | u32 queue_depth) | |
360 | { | |
361 | struct se_node_acl *acl = NULL; | |
362 | ||
28638887 | 363 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 364 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 365 | if (acl) { |
c66ac9db NB |
366 | if (acl->dynamic_node_acl) { |
367 | acl->dynamic_node_acl = 0; | |
6708bb27 | 368 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
369 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
370 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 371 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
372 | /* |
373 | * Release the locally allocated struct se_node_acl | |
374 | * because * core_tpg_add_initiator_node_acl() returned | |
375 | * a pointer to an existing demo mode node ACL. | |
376 | */ | |
377 | if (se_nacl) | |
e3d6f909 | 378 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
379 | se_nacl); |
380 | goto done; | |
381 | } | |
382 | ||
6708bb27 | 383 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 384 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
385 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
386 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 387 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
388 | return ERR_PTR(-EEXIST); |
389 | } | |
28638887 | 390 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 391 | |
6708bb27 AG |
392 | if (!se_nacl) { |
393 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
394 | return ERR_PTR(-EINVAL); |
395 | } | |
396 | /* | |
397 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
398 | * dependent structure allocated via | |
399 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
400 | */ | |
401 | acl = se_nacl; | |
402 | ||
403 | INIT_LIST_HEAD(&acl->acl_list); | |
404 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 405 | kref_init(&acl->acl_kref); |
01468346 | 406 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
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 | { | |
337c0607 | 453 | LIST_HEAD(sess_list); |
c66ac9db | 454 | struct se_session *sess, *sess_tmp; |
140854cb | 455 | unsigned long flags; |
28168905 | 456 | int rc; |
c66ac9db | 457 | |
28638887 | 458 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
459 | if (acl->dynamic_node_acl) { |
460 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
461 | } |
462 | list_del(&acl->acl_list); | |
463 | tpg->num_node_acls--; | |
28638887 | 464 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 465 | |
337c0607 NB |
466 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
467 | acl->acl_stop = 1; | |
468 | ||
469 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
470 | sess_acl_list) { | |
471 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
472 | continue; |
473 | ||
337c0607 NB |
474 | target_get_session(sess); |
475 | list_move(&sess->sess_acl_list, &sess_list); | |
476 | } | |
477 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
478 | ||
479 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
480 | list_del(&sess->sess_acl_list); | |
c66ac9db | 481 | |
337c0607 NB |
482 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
483 | target_put_session(sess); | |
484 | if (!rc) | |
485 | continue; | |
486 | target_put_session(sess); | |
c66ac9db | 487 | } |
337c0607 NB |
488 | target_put_nacl(acl); |
489 | /* | |
490 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
491 | * for active fabric session transport_deregister_session() callbacks. | |
492 | */ | |
493 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
494 | |
495 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
496 | core_clear_initiator_node_from_tpg(acl, tpg); |
497 | core_free_device_list_for_node(acl, tpg); | |
498 | ||
6708bb27 | 499 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
500 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
501 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
502 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
503 | |
504 | return 0; | |
505 | } | |
506 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
507 | ||
508 | /* core_tpg_set_initiator_node_queue_depth(): | |
509 | * | |
510 | * | |
511 | */ | |
512 | int core_tpg_set_initiator_node_queue_depth( | |
513 | struct se_portal_group *tpg, | |
514 | unsigned char *initiatorname, | |
515 | u32 queue_depth, | |
516 | int force) | |
517 | { | |
518 | struct se_session *sess, *init_sess = NULL; | |
519 | struct se_node_acl *acl; | |
140854cb | 520 | unsigned long flags; |
c66ac9db NB |
521 | int dynamic_acl = 0; |
522 | ||
28638887 | 523 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 524 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
525 | if (!acl) { |
526 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 527 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
528 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
529 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 530 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
531 | return -ENODEV; |
532 | } | |
533 | if (acl->dynamic_node_acl) { | |
534 | acl->dynamic_node_acl = 0; | |
535 | dynamic_acl = 1; | |
536 | } | |
28638887 | 537 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 538 | |
140854cb | 539 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
540 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
541 | if (sess->se_node_acl != acl) | |
542 | continue; | |
543 | ||
544 | if (!force) { | |
6708bb27 | 545 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
546 | " Initiator Node: %s while session is" |
547 | " operational. To forcefully change the queue" | |
548 | " depth and force session reinstatement" | |
549 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 550 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 551 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 552 | |
28638887 | 553 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
554 | if (dynamic_acl) |
555 | acl->dynamic_node_acl = 1; | |
28638887 | 556 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
557 | return -EEXIST; |
558 | } | |
559 | /* | |
560 | * Determine if the session needs to be closed by our context. | |
561 | */ | |
6708bb27 | 562 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
563 | continue; |
564 | ||
565 | init_sess = sess; | |
566 | break; | |
567 | } | |
568 | ||
569 | /* | |
570 | * User has requested to change the queue depth for a Initiator Node. | |
571 | * Change the value in the Node's struct se_node_acl, and call | |
572 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
573 | * | |
e3d6f909 | 574 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
575 | * reinstatement to occur if there is an active session for the |
576 | * $FABRIC_MOD Initiator Node in question. | |
577 | */ | |
578 | acl->queue_depth = queue_depth; | |
579 | ||
580 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 581 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
582 | /* |
583 | * Force session reinstatement if | |
584 | * core_set_queue_depth_for_node() failed, because we assume | |
585 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 586 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
587 | */ |
588 | if (init_sess) | |
e3d6f909 | 589 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 590 | |
28638887 | 591 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
592 | if (dynamic_acl) |
593 | acl->dynamic_node_acl = 1; | |
28638887 | 594 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
595 | return -EINVAL; |
596 | } | |
140854cb | 597 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
598 | /* |
599 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
600 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
601 | */ | |
602 | if (init_sess) | |
e3d6f909 | 603 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 604 | |
bfb9035c | 605 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 606 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
607 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
608 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 609 | |
28638887 | 610 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
611 | if (dynamic_acl) |
612 | acl->dynamic_node_acl = 1; | |
28638887 | 613 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
614 | |
615 | return 0; | |
616 | } | |
617 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
618 | ||
619 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
620 | { | |
621 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 622 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
623 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
624 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
625 | int ret; | |
626 | ||
627 | lun->unpacked_lun = 0; | |
628 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
629 | atomic_set(&lun->lun_acl_count, 0); | |
630 | init_completion(&lun->lun_shutdown_comp); | |
631 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
632 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
633 | spin_lock_init(&lun->lun_acl_lock); | |
634 | spin_lock_init(&lun->lun_cmd_lock); | |
635 | spin_lock_init(&lun->lun_sep_lock); | |
636 | ||
637 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
638 | if (ret < 0) | |
e3d6f909 | 639 | return ret; |
c66ac9db NB |
640 | |
641 | return 0; | |
642 | } | |
643 | ||
644 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
645 | { | |
646 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
647 | ||
648 | core_tpg_post_dellun(se_tpg, lun); | |
649 | } | |
650 | ||
651 | int core_tpg_register( | |
652 | struct target_core_fabric_ops *tfo, | |
653 | struct se_wwn *se_wwn, | |
654 | struct se_portal_group *se_tpg, | |
655 | void *tpg_fabric_ptr, | |
656 | int se_tpg_type) | |
657 | { | |
658 | struct se_lun *lun; | |
659 | u32 i; | |
660 | ||
4a5a75f3 JE |
661 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
662 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
663 | if (!se_tpg->tpg_lun_list) { |
664 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
665 | "tpg_lun_list\n"); |
666 | return -ENOMEM; | |
667 | } | |
668 | ||
669 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 670 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db | 671 | lun->unpacked_lun = i; |
0ff87549 | 672 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
c66ac9db NB |
673 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
674 | atomic_set(&lun->lun_acl_count, 0); | |
675 | init_completion(&lun->lun_shutdown_comp); | |
676 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
677 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
678 | spin_lock_init(&lun->lun_acl_lock); | |
679 | spin_lock_init(&lun->lun_cmd_lock); | |
680 | spin_lock_init(&lun->lun_sep_lock); | |
681 | } | |
682 | ||
683 | se_tpg->se_tpg_type = se_tpg_type; | |
684 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
685 | se_tpg->se_tpg_tfo = tfo; | |
686 | se_tpg->se_tpg_wwn = se_wwn; | |
687 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
688 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 689 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
690 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
691 | spin_lock_init(&se_tpg->acl_node_lock); | |
692 | spin_lock_init(&se_tpg->session_lock); | |
693 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
694 | ||
695 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
696 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
697 | kfree(se_tpg); | |
698 | return -ENOMEM; | |
699 | } | |
700 | } | |
701 | ||
e3d6f909 AG |
702 | spin_lock_bh(&tpg_lock); |
703 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
704 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 705 | |
6708bb27 | 706 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
707 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
708 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
709 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
710 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
711 | ||
712 | return 0; | |
713 | } | |
714 | EXPORT_SYMBOL(core_tpg_register); | |
715 | ||
716 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
717 | { | |
e89d15ee NB |
718 | struct se_node_acl *nacl, *nacl_tmp; |
719 | ||
6708bb27 | 720 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
721 | " for endpoint: %s Portal Tag %u\n", |
722 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
723 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
724 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
725 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 726 | |
e3d6f909 AG |
727 | spin_lock_bh(&tpg_lock); |
728 | list_del(&se_tpg->se_tpg_node); | |
729 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
730 | |
731 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
732 | cpu_relax(); | |
e89d15ee NB |
733 | /* |
734 | * Release any remaining demo-mode generated se_node_acl that have | |
735 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
736 | * in transport_deregister_session(). | |
737 | */ | |
28638887 | 738 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
739 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
740 | acl_list) { | |
741 | list_del(&nacl->acl_list); | |
742 | se_tpg->num_node_acls--; | |
28638887 | 743 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
744 | |
745 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
746 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 747 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 748 | |
28638887 | 749 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 750 | } |
28638887 | 751 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
752 | |
753 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
754 | core_tpg_release_virtual_lun0(se_tpg); | |
755 | ||
756 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 757 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
758 | return 0; |
759 | } | |
760 | EXPORT_SYMBOL(core_tpg_deregister); | |
761 | ||
762 | struct se_lun *core_tpg_pre_addlun( | |
763 | struct se_portal_group *tpg, | |
764 | u32 unpacked_lun) | |
765 | { | |
766 | struct se_lun *lun; | |
767 | ||
768 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 769 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 770 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 771 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 772 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 773 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
774 | return ERR_PTR(-EOVERFLOW); |
775 | } | |
776 | ||
777 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 778 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 779 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 780 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 781 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
782 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
783 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
784 | spin_unlock(&tpg->tpg_lun_lock); |
785 | return ERR_PTR(-EINVAL); | |
786 | } | |
787 | spin_unlock(&tpg->tpg_lun_lock); | |
788 | ||
789 | return lun; | |
790 | } | |
791 | ||
792 | int core_tpg_post_addlun( | |
793 | struct se_portal_group *tpg, | |
794 | struct se_lun *lun, | |
795 | u32 lun_access, | |
796 | void *lun_ptr) | |
797 | { | |
e3d6f909 AG |
798 | int ret; |
799 | ||
800 | ret = core_dev_export(lun_ptr, tpg, lun); | |
801 | if (ret < 0) | |
802 | return ret; | |
c66ac9db NB |
803 | |
804 | spin_lock(&tpg->tpg_lun_lock); | |
805 | lun->lun_access = lun_access; | |
806 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
807 | spin_unlock(&tpg->tpg_lun_lock); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static void core_tpg_shutdown_lun( | |
813 | struct se_portal_group *tpg, | |
814 | struct se_lun *lun) | |
815 | { | |
816 | core_clear_lun_from_tpg(lun, tpg); | |
817 | transport_clear_lun_from_sessions(lun); | |
818 | } | |
819 | ||
820 | struct se_lun *core_tpg_pre_dellun( | |
821 | struct se_portal_group *tpg, | |
8d9efe53 | 822 | u32 unpacked_lun) |
c66ac9db NB |
823 | { |
824 | struct se_lun *lun; | |
825 | ||
826 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 827 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 828 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 829 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 830 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 831 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
832 | return ERR_PTR(-EOVERFLOW); |
833 | } | |
834 | ||
835 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 836 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 837 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 838 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 839 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
840 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
841 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
842 | spin_unlock(&tpg->tpg_lun_lock); |
843 | return ERR_PTR(-ENODEV); | |
844 | } | |
845 | spin_unlock(&tpg->tpg_lun_lock); | |
846 | ||
847 | return lun; | |
848 | } | |
849 | ||
850 | int core_tpg_post_dellun( | |
851 | struct se_portal_group *tpg, | |
852 | struct se_lun *lun) | |
853 | { | |
854 | core_tpg_shutdown_lun(tpg, lun); | |
855 | ||
856 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
857 | ||
858 | spin_lock(&tpg->tpg_lun_lock); | |
859 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
860 | spin_unlock(&tpg->tpg_lun_lock); | |
861 | ||
862 | return 0; | |
863 | } |