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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" |
e2480563 | 43 | #include "target_core_pr.h" |
e3d6f909 AG |
44 | |
45 | extern struct se_device *g_lun0_dev; | |
46 | ||
47 | static DEFINE_SPINLOCK(tpg_lock); | |
48 | static LIST_HEAD(tpg_list); | |
c66ac9db NB |
49 | |
50 | /* core_clear_initiator_node_from_tpg(): | |
51 | * | |
52 | * | |
53 | */ | |
54 | static void core_clear_initiator_node_from_tpg( | |
55 | struct se_node_acl *nacl, | |
56 | struct se_portal_group *tpg) | |
57 | { | |
58 | int i; | |
59 | struct se_dev_entry *deve; | |
60 | struct se_lun *lun; | |
c66ac9db NB |
61 | |
62 | spin_lock_irq(&nacl->device_list_lock); | |
63 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 64 | deve = nacl->device_list[i]; |
c66ac9db NB |
65 | |
66 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
67 | continue; | |
68 | ||
69 | if (!deve->se_lun) { | |
6708bb27 | 70 | pr_err("%s device entries device pointer is" |
c66ac9db | 71 | " NULL, but Initiator has access.\n", |
e3d6f909 | 72 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
73 | continue; |
74 | } | |
75 | ||
76 | lun = deve->se_lun; | |
77 | spin_unlock_irq(&nacl->device_list_lock); | |
e80ac6c4 AG |
78 | core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, |
79 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); | |
c66ac9db | 80 | |
c66ac9db | 81 | spin_lock_irq(&nacl->device_list_lock); |
c66ac9db NB |
82 | } |
83 | spin_unlock_irq(&nacl->device_list_lock); | |
84 | } | |
85 | ||
86 | /* __core_tpg_get_initiator_node_acl(): | |
87 | * | |
88 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling | |
89 | */ | |
90 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
91 | struct se_portal_group *tpg, | |
92 | const char *initiatorname) | |
93 | { | |
94 | struct se_node_acl *acl; | |
95 | ||
96 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 97 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
98 | return acl; |
99 | } | |
100 | ||
101 | return NULL; | |
102 | } | |
103 | ||
104 | /* core_tpg_get_initiator_node_acl(): | |
105 | * | |
106 | * | |
107 | */ | |
108 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
109 | struct se_portal_group *tpg, | |
110 | unsigned char *initiatorname) | |
111 | { | |
112 | struct se_node_acl *acl; | |
113 | ||
28638887 | 114 | spin_lock_irq(&tpg->acl_node_lock); |
fcf29481 | 115 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
28638887 | 116 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 117 | |
fcf29481 | 118 | return acl; |
c66ac9db | 119 | } |
b3fde035 | 120 | EXPORT_SYMBOL(core_tpg_get_initiator_node_acl); |
c66ac9db NB |
121 | |
122 | /* core_tpg_add_node_to_devs(): | |
123 | * | |
124 | * | |
125 | */ | |
126 | void core_tpg_add_node_to_devs( | |
127 | struct se_node_acl *acl, | |
128 | struct se_portal_group *tpg) | |
129 | { | |
130 | int i = 0; | |
131 | u32 lun_access = 0; | |
132 | struct se_lun *lun; | |
133 | struct se_device *dev; | |
134 | ||
135 | spin_lock(&tpg->tpg_lun_lock); | |
136 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 137 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
138 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
139 | continue; | |
140 | ||
141 | spin_unlock(&tpg->tpg_lun_lock); | |
142 | ||
143 | dev = lun->lun_se_dev; | |
144 | /* | |
145 | * By default in LIO-Target $FABRIC_MOD, | |
146 | * demo_mode_write_protect is ON, or READ_ONLY; | |
147 | */ | |
6708bb27 | 148 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 149 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
150 | } else { |
151 | /* | |
152 | * Allow only optical drives to issue R/W in default RO | |
153 | * demo mode. | |
154 | */ | |
e3d6f909 | 155 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
156 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
157 | else | |
158 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
159 | } | |
160 | ||
6708bb27 | 161 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 162 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
163 | tpg->se_tpg_tfo->get_fabric_name(), |
164 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
165 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
166 | "READ-WRITE" : "READ-ONLY"); | |
167 | ||
e80ac6c4 AG |
168 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
169 | lun_access, acl, tpg); | |
e2480563 NB |
170 | /* |
171 | * Check to see if there are any existing persistent reservation | |
172 | * APTPL pre-registrations that need to be enabled for this dynamic | |
173 | * LUN ACL now.. | |
174 | */ | |
175 | core_scsi3_check_aptpl_registration(dev, tpg, lun, acl, | |
176 | lun->unpacked_lun); | |
c66ac9db NB |
177 | spin_lock(&tpg->tpg_lun_lock); |
178 | } | |
179 | spin_unlock(&tpg->tpg_lun_lock); | |
180 | } | |
181 | ||
182 | /* core_set_queue_depth_for_node(): | |
183 | * | |
184 | * | |
185 | */ | |
186 | static int core_set_queue_depth_for_node( | |
187 | struct se_portal_group *tpg, | |
188 | struct se_node_acl *acl) | |
189 | { | |
190 | if (!acl->queue_depth) { | |
6708bb27 | 191 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 192 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
193 | acl->initiatorname); |
194 | acl->queue_depth = 1; | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
4a5a75f3 JE |
200 | void array_free(void *array, int n) |
201 | { | |
202 | void **a = array; | |
203 | int i; | |
204 | ||
205 | for (i = 0; i < n; i++) | |
206 | kfree(a[i]); | |
207 | kfree(a); | |
208 | } | |
209 | ||
210 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
211 | { | |
212 | void **a; | |
213 | int i; | |
214 | ||
215 | a = kzalloc(n * sizeof(void*), flags); | |
216 | if (!a) | |
217 | return NULL; | |
218 | for (i = 0; i < n; i++) { | |
219 | a[i] = kzalloc(size, flags); | |
220 | if (!a[i]) { | |
221 | array_free(a, n); | |
222 | return NULL; | |
223 | } | |
224 | } | |
225 | return a; | |
226 | } | |
227 | ||
c66ac9db NB |
228 | /* core_create_device_list_for_node(): |
229 | * | |
230 | * | |
231 | */ | |
232 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
233 | { | |
234 | struct se_dev_entry *deve; | |
235 | int i; | |
236 | ||
f2083241 JE |
237 | nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
238 | sizeof(struct se_dev_entry), GFP_KERNEL); | |
6708bb27 AG |
239 | if (!nacl->device_list) { |
240 | pr_err("Unable to allocate memory for" | |
c66ac9db | 241 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 242 | return -ENOMEM; |
c66ac9db NB |
243 | } |
244 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 245 | deve = nacl->device_list[i]; |
c66ac9db NB |
246 | |
247 | atomic_set(&deve->ua_count, 0); | |
248 | atomic_set(&deve->pr_ref_count, 0); | |
249 | spin_lock_init(&deve->ua_lock); | |
250 | INIT_LIST_HEAD(&deve->alua_port_list); | |
251 | INIT_LIST_HEAD(&deve->ua_list); | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
e413f472 CH |
257 | static struct se_node_acl *target_alloc_node_acl(struct se_portal_group *tpg, |
258 | const unsigned char *initiatorname) | |
c66ac9db NB |
259 | { |
260 | struct se_node_acl *acl; | |
261 | ||
144bc4c2 CH |
262 | acl = kzalloc(max(sizeof(*acl), tpg->se_tpg_tfo->node_acl_size), |
263 | GFP_KERNEL); | |
6708bb27 | 264 | if (!acl) |
c66ac9db NB |
265 | return NULL; |
266 | ||
267 | INIT_LIST_HEAD(&acl->acl_list); | |
268 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 269 | kref_init(&acl->acl_kref); |
01468346 | 270 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
271 | spin_lock_init(&acl->device_list_lock); |
272 | spin_lock_init(&acl->nacl_sess_lock); | |
273 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e1750d20 CH |
274 | if (tpg->se_tpg_tfo->tpg_get_default_depth) |
275 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); | |
276 | else | |
277 | acl->queue_depth = 1; | |
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); | |
c66ac9db | 281 | |
e3d6f909 | 282 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db | 283 | |
e413f472 CH |
284 | if (core_create_device_list_for_node(acl) < 0) |
285 | goto out_free_acl; | |
286 | if (core_set_queue_depth_for_node(tpg, acl) < 0) | |
287 | goto out_free_device_list; | |
288 | ||
289 | return acl; | |
290 | ||
291 | out_free_device_list: | |
292 | core_free_device_list_for_node(acl, tpg); | |
293 | out_free_acl: | |
144bc4c2 | 294 | kfree(acl); |
e413f472 CH |
295 | return NULL; |
296 | } | |
297 | ||
298 | static void target_add_node_acl(struct se_node_acl *acl) | |
299 | { | |
300 | struct se_portal_group *tpg = acl->se_tpg; | |
301 | ||
302 | spin_lock_irq(&tpg->acl_node_lock); | |
303 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); | |
304 | tpg->num_node_acls++; | |
305 | spin_unlock_irq(&tpg->acl_node_lock); | |
306 | ||
307 | pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s" | |
308 | " Initiator Node: %s\n", | |
309 | tpg->se_tpg_tfo->get_fabric_name(), | |
310 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
311 | acl->dynamic_node_acl ? "DYNAMIC" : "", | |
312 | acl->queue_depth, | |
313 | tpg->se_tpg_tfo->get_fabric_name(), | |
314 | acl->initiatorname); | |
315 | } | |
316 | ||
317 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
318 | struct se_portal_group *tpg, | |
319 | unsigned char *initiatorname) | |
320 | { | |
321 | struct se_node_acl *acl; | |
322 | ||
323 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
324 | if (acl) | |
325 | return acl; | |
326 | ||
327 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) | |
c66ac9db | 328 | return NULL; |
c66ac9db | 329 | |
e413f472 CH |
330 | acl = target_alloc_node_acl(tpg, initiatorname); |
331 | if (!acl) | |
c66ac9db | 332 | return NULL; |
e413f472 CH |
333 | acl->dynamic_node_acl = 1; |
334 | ||
052605c6 NB |
335 | /* |
336 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 337 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
338 | * tpg_check_demo_mode_login_only() == 1. |
339 | */ | |
cdf88a2f AG |
340 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
341 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
052605c6 | 342 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 343 | |
e413f472 | 344 | target_add_node_acl(acl); |
c66ac9db NB |
345 | return acl; |
346 | } | |
347 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
348 | ||
349 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
350 | { | |
351 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
352 | cpu_relax(); | |
353 | } | |
354 | ||
c66ac9db NB |
355 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
356 | { | |
28168905 | 357 | int i; |
c66ac9db NB |
358 | struct se_lun *lun; |
359 | ||
360 | spin_lock(&tpg->tpg_lun_lock); | |
361 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 362 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
363 | |
364 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
365 | (lun->lun_se_dev == NULL)) | |
366 | continue; | |
367 | ||
368 | spin_unlock(&tpg->tpg_lun_lock); | |
cd9d7cba | 369 | core_dev_del_lun(tpg, lun); |
c66ac9db NB |
370 | spin_lock(&tpg->tpg_lun_lock); |
371 | } | |
372 | spin_unlock(&tpg->tpg_lun_lock); | |
373 | } | |
374 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
375 | ||
c66ac9db NB |
376 | struct se_node_acl *core_tpg_add_initiator_node_acl( |
377 | struct se_portal_group *tpg, | |
c7d6a803 | 378 | const char *initiatorname) |
c66ac9db | 379 | { |
c7d6a803 | 380 | struct se_node_acl *acl; |
c66ac9db | 381 | |
28638887 | 382 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 383 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 384 | if (acl) { |
c66ac9db NB |
385 | if (acl->dynamic_node_acl) { |
386 | acl->dynamic_node_acl = 0; | |
6708bb27 | 387 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
388 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
389 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 390 | spin_unlock_irq(&tpg->acl_node_lock); |
e413f472 | 391 | return acl; |
c66ac9db NB |
392 | } |
393 | ||
6708bb27 | 394 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 395 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
396 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
397 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 398 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
399 | return ERR_PTR(-EEXIST); |
400 | } | |
28638887 | 401 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 402 | |
e413f472 CH |
403 | acl = target_alloc_node_acl(tpg, initiatorname); |
404 | if (!acl) | |
c66ac9db | 405 | return ERR_PTR(-ENOMEM); |
c66ac9db | 406 | |
e413f472 | 407 | target_add_node_acl(acl); |
c66ac9db NB |
408 | return acl; |
409 | } | |
c66ac9db | 410 | |
c7d6a803 | 411 | void core_tpg_del_initiator_node_acl(struct se_node_acl *acl) |
c66ac9db | 412 | { |
c7d6a803 | 413 | struct se_portal_group *tpg = acl->se_tpg; |
337c0607 | 414 | LIST_HEAD(sess_list); |
c66ac9db | 415 | struct se_session *sess, *sess_tmp; |
140854cb | 416 | unsigned long flags; |
28168905 | 417 | int rc; |
c66ac9db | 418 | |
28638887 | 419 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
420 | if (acl->dynamic_node_acl) { |
421 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
422 | } |
423 | list_del(&acl->acl_list); | |
424 | tpg->num_node_acls--; | |
28638887 | 425 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 426 | |
337c0607 NB |
427 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
428 | acl->acl_stop = 1; | |
429 | ||
430 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
431 | sess_acl_list) { | |
432 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
433 | continue; |
434 | ||
337c0607 NB |
435 | target_get_session(sess); |
436 | list_move(&sess->sess_acl_list, &sess_list); | |
437 | } | |
438 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
439 | ||
440 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
441 | list_del(&sess->sess_acl_list); | |
c66ac9db | 442 | |
337c0607 NB |
443 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
444 | target_put_session(sess); | |
445 | if (!rc) | |
446 | continue; | |
447 | target_put_session(sess); | |
c66ac9db | 448 | } |
337c0607 NB |
449 | target_put_nacl(acl); |
450 | /* | |
451 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
452 | * for active fabric session transport_deregister_session() callbacks. | |
453 | */ | |
454 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
455 | |
456 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
457 | core_clear_initiator_node_from_tpg(acl, tpg); |
458 | core_free_device_list_for_node(acl, tpg); | |
459 | ||
6708bb27 | 460 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
461 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
462 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
463 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db | 464 | |
144bc4c2 | 465 | kfree(acl); |
c66ac9db | 466 | } |
c66ac9db NB |
467 | |
468 | /* core_tpg_set_initiator_node_queue_depth(): | |
469 | * | |
470 | * | |
471 | */ | |
472 | int core_tpg_set_initiator_node_queue_depth( | |
473 | struct se_portal_group *tpg, | |
474 | unsigned char *initiatorname, | |
475 | u32 queue_depth, | |
476 | int force) | |
477 | { | |
478 | struct se_session *sess, *init_sess = NULL; | |
479 | struct se_node_acl *acl; | |
140854cb | 480 | unsigned long flags; |
c66ac9db NB |
481 | int dynamic_acl = 0; |
482 | ||
28638887 | 483 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 484 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
485 | if (!acl) { |
486 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 487 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
488 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
489 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 490 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
491 | return -ENODEV; |
492 | } | |
493 | if (acl->dynamic_node_acl) { | |
494 | acl->dynamic_node_acl = 0; | |
495 | dynamic_acl = 1; | |
496 | } | |
28638887 | 497 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 498 | |
140854cb | 499 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
500 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
501 | if (sess->se_node_acl != acl) | |
502 | continue; | |
503 | ||
504 | if (!force) { | |
6708bb27 | 505 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
506 | " Initiator Node: %s while session is" |
507 | " operational. To forcefully change the queue" | |
508 | " depth and force session reinstatement" | |
509 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 510 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 511 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 512 | |
28638887 | 513 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
514 | if (dynamic_acl) |
515 | acl->dynamic_node_acl = 1; | |
28638887 | 516 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
517 | return -EEXIST; |
518 | } | |
519 | /* | |
520 | * Determine if the session needs to be closed by our context. | |
521 | */ | |
6708bb27 | 522 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
523 | continue; |
524 | ||
525 | init_sess = sess; | |
526 | break; | |
527 | } | |
528 | ||
529 | /* | |
530 | * User has requested to change the queue depth for a Initiator Node. | |
531 | * Change the value in the Node's struct se_node_acl, and call | |
532 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
533 | * | |
e3d6f909 | 534 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
535 | * reinstatement to occur if there is an active session for the |
536 | * $FABRIC_MOD Initiator Node in question. | |
537 | */ | |
538 | acl->queue_depth = queue_depth; | |
539 | ||
540 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 541 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
542 | /* |
543 | * Force session reinstatement if | |
544 | * core_set_queue_depth_for_node() failed, because we assume | |
545 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 546 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
547 | */ |
548 | if (init_sess) | |
e3d6f909 | 549 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 550 | |
28638887 | 551 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
552 | if (dynamic_acl) |
553 | acl->dynamic_node_acl = 1; | |
28638887 | 554 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
555 | return -EINVAL; |
556 | } | |
140854cb | 557 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
558 | /* |
559 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
560 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
561 | */ | |
562 | if (init_sess) | |
e3d6f909 | 563 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 564 | |
bfb9035c | 565 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 566 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
567 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
568 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 569 | |
28638887 | 570 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
571 | if (dynamic_acl) |
572 | acl->dynamic_node_acl = 1; | |
28638887 | 573 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
574 | |
575 | return 0; | |
576 | } | |
577 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
578 | ||
79e62fc3 AG |
579 | /* core_tpg_set_initiator_node_tag(): |
580 | * | |
581 | * Initiator nodeacl tags are not used internally, but may be used by | |
582 | * userspace to emulate aliases or groups. | |
583 | * Returns length of newly-set tag or -EINVAL. | |
584 | */ | |
585 | int core_tpg_set_initiator_node_tag( | |
586 | struct se_portal_group *tpg, | |
587 | struct se_node_acl *acl, | |
588 | const char *new_tag) | |
589 | { | |
590 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
591 | return -EINVAL; | |
592 | ||
593 | if (!strncmp("NULL", new_tag, 4)) { | |
594 | acl->acl_tag[0] = '\0'; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
599 | } | |
600 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
601 | ||
5277797d NB |
602 | static void core_tpg_lun_ref_release(struct percpu_ref *ref) |
603 | { | |
604 | struct se_lun *lun = container_of(ref, struct se_lun, lun_ref); | |
605 | ||
606 | complete(&lun->lun_ref_comp); | |
607 | } | |
608 | ||
c66ac9db NB |
609 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) |
610 | { | |
611 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 612 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
613 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
614 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
615 | int ret; | |
616 | ||
617 | lun->unpacked_lun = 0; | |
618 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
619 | atomic_set(&lun->lun_acl_count, 0); | |
620 | init_completion(&lun->lun_shutdown_comp); | |
621 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
c66ac9db | 622 | spin_lock_init(&lun->lun_acl_lock); |
c66ac9db | 623 | spin_lock_init(&lun->lun_sep_lock); |
5277797d | 624 | init_completion(&lun->lun_ref_comp); |
c66ac9db | 625 | |
d344f8a1 | 626 | ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev); |
de06875f | 627 | if (ret < 0) |
5277797d | 628 | return ret; |
5277797d | 629 | |
c66ac9db NB |
630 | return 0; |
631 | } | |
632 | ||
c66ac9db | 633 | int core_tpg_register( |
9ac8928e | 634 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
635 | struct se_wwn *se_wwn, |
636 | struct se_portal_group *se_tpg, | |
e4aae5af | 637 | int proto_id) |
c66ac9db NB |
638 | { |
639 | struct se_lun *lun; | |
640 | u32 i; | |
641 | ||
4a5a75f3 JE |
642 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
643 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
644 | if (!se_tpg->tpg_lun_list) { |
645 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
646 | "tpg_lun_list\n"); |
647 | return -ENOMEM; | |
648 | } | |
649 | ||
650 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 651 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db | 652 | lun->unpacked_lun = i; |
0ff87549 | 653 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
c66ac9db NB |
654 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
655 | atomic_set(&lun->lun_acl_count, 0); | |
656 | init_completion(&lun->lun_shutdown_comp); | |
657 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
c66ac9db | 658 | spin_lock_init(&lun->lun_acl_lock); |
c66ac9db | 659 | spin_lock_init(&lun->lun_sep_lock); |
5277797d | 660 | init_completion(&lun->lun_ref_comp); |
c66ac9db NB |
661 | } |
662 | ||
e4aae5af | 663 | se_tpg->proto_id = proto_id; |
c66ac9db NB |
664 | se_tpg->se_tpg_tfo = tfo; |
665 | se_tpg->se_tpg_wwn = se_wwn; | |
666 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
667 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 668 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
669 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
670 | spin_lock_init(&se_tpg->acl_node_lock); | |
671 | spin_lock_init(&se_tpg->session_lock); | |
672 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
673 | ||
e4aae5af | 674 | if (se_tpg->proto_id >= 0) { |
c66ac9db | 675 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { |
0fb889b8 WY |
676 | array_free(se_tpg->tpg_lun_list, |
677 | TRANSPORT_MAX_LUNS_PER_TPG); | |
c66ac9db NB |
678 | return -ENOMEM; |
679 | } | |
680 | } | |
681 | ||
e3d6f909 AG |
682 | spin_lock_bh(&tpg_lock); |
683 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
684 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 685 | |
e4aae5af CH |
686 | pr_debug("TARGET_CORE[%s]: Allocated portal_group for endpoint: %s, " |
687 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), | |
688 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, | |
689 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); | |
c66ac9db NB |
690 | |
691 | return 0; | |
692 | } | |
693 | EXPORT_SYMBOL(core_tpg_register); | |
694 | ||
695 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
696 | { | |
e4aae5af | 697 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
e89d15ee NB |
698 | struct se_node_acl *nacl, *nacl_tmp; |
699 | ||
e4aae5af CH |
700 | pr_debug("TARGET_CORE[%s]: Deallocating portal_group for endpoint: %s, " |
701 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), | |
702 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, | |
703 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 704 | |
e3d6f909 AG |
705 | spin_lock_bh(&tpg_lock); |
706 | list_del(&se_tpg->se_tpg_node); | |
707 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
708 | |
709 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
710 | cpu_relax(); | |
e89d15ee NB |
711 | /* |
712 | * Release any remaining demo-mode generated se_node_acl that have | |
713 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
714 | * in transport_deregister_session(). | |
715 | */ | |
28638887 | 716 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
717 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
718 | acl_list) { | |
719 | list_del(&nacl->acl_list); | |
720 | se_tpg->num_node_acls--; | |
28638887 | 721 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
722 | |
723 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
724 | core_free_device_list_for_node(nacl, se_tpg); | |
144bc4c2 | 725 | kfree(nacl); |
e89d15ee | 726 | |
28638887 | 727 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 728 | } |
28638887 | 729 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db | 730 | |
e4aae5af | 731 | if (se_tpg->proto_id >= 0) |
9c7d6154 | 732 | core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0); |
c66ac9db | 733 | |
4a5a75f3 | 734 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
735 | return 0; |
736 | } | |
737 | EXPORT_SYMBOL(core_tpg_deregister); | |
738 | ||
d344f8a1 | 739 | struct se_lun *core_tpg_alloc_lun( |
c66ac9db NB |
740 | struct se_portal_group *tpg, |
741 | u32 unpacked_lun) | |
742 | { | |
743 | struct se_lun *lun; | |
744 | ||
745 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 746 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 747 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 748 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 749 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 750 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
751 | return ERR_PTR(-EOVERFLOW); |
752 | } | |
753 | ||
754 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 755 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 756 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 757 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 758 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
759 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
760 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
761 | spin_unlock(&tpg->tpg_lun_lock); |
762 | return ERR_PTR(-EINVAL); | |
763 | } | |
764 | spin_unlock(&tpg->tpg_lun_lock); | |
765 | ||
766 | return lun; | |
767 | } | |
768 | ||
d344f8a1 | 769 | int core_tpg_add_lun( |
c66ac9db NB |
770 | struct se_portal_group *tpg, |
771 | struct se_lun *lun, | |
772 | u32 lun_access, | |
340dbf72 | 773 | struct se_device *dev) |
c66ac9db | 774 | { |
e3d6f909 AG |
775 | int ret; |
776 | ||
2aad2a86 | 777 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0, |
a34375ef | 778 | GFP_KERNEL); |
e3d6f909 AG |
779 | if (ret < 0) |
780 | return ret; | |
c66ac9db | 781 | |
340dbf72 | 782 | ret = core_dev_export(dev, tpg, lun); |
5277797d | 783 | if (ret < 0) { |
9a1049da | 784 | percpu_ref_exit(&lun->lun_ref); |
5277797d NB |
785 | return ret; |
786 | } | |
787 | ||
c66ac9db NB |
788 | spin_lock(&tpg->tpg_lun_lock); |
789 | lun->lun_access = lun_access; | |
790 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
791 | spin_unlock(&tpg->tpg_lun_lock); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
cd9d7cba | 796 | void core_tpg_remove_lun( |
c66ac9db NB |
797 | struct se_portal_group *tpg, |
798 | struct se_lun *lun) | |
799 | { | |
4a9a6c8d NB |
800 | core_clear_lun_from_tpg(lun, tpg); |
801 | transport_clear_lun_ref(lun); | |
c66ac9db NB |
802 | |
803 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
804 | ||
805 | spin_lock(&tpg->tpg_lun_lock); | |
806 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
807 | spin_unlock(&tpg->tpg_lun_lock); | |
808 | ||
9a1049da | 809 | percpu_ref_exit(&lun->lun_ref); |
c66ac9db | 810 | } |