Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_tpg.c | |
3 | * | |
4 | * This file contains generic Target Portal Group related functions. | |
5 | * | |
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" |
ec0f40e8 | 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 NB |
119 | } |
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); | |
ec0f40e8 NB |
169 | /* |
170 | * Check to see if there are any existing persistent reservation | |
171 | * APTPL pre-registrations that need to be enabled for this dynamic | |
172 | * LUN ACL now.. | |
173 | */ | |
174 | core_scsi3_check_aptpl_registration(dev, tpg, lun, acl, | |
175 | lun->unpacked_lun); | |
c66ac9db NB |
176 | spin_lock(&tpg->tpg_lun_lock); |
177 | } | |
178 | spin_unlock(&tpg->tpg_lun_lock); | |
179 | } | |
180 | ||
181 | /* core_set_queue_depth_for_node(): | |
182 | * | |
183 | * | |
184 | */ | |
185 | static int core_set_queue_depth_for_node( | |
186 | struct se_portal_group *tpg, | |
187 | struct se_node_acl *acl) | |
188 | { | |
189 | if (!acl->queue_depth) { | |
6708bb27 | 190 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 191 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
192 | acl->initiatorname); |
193 | acl->queue_depth = 1; | |
194 | } | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
4a5a75f3 JE |
199 | void array_free(void *array, int n) |
200 | { | |
201 | void **a = array; | |
202 | int i; | |
203 | ||
204 | for (i = 0; i < n; i++) | |
205 | kfree(a[i]); | |
206 | kfree(a); | |
207 | } | |
208 | ||
209 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
210 | { | |
211 | void **a; | |
212 | int i; | |
213 | ||
214 | a = kzalloc(n * sizeof(void*), flags); | |
215 | if (!a) | |
216 | return NULL; | |
217 | for (i = 0; i < n; i++) { | |
218 | a[i] = kzalloc(size, flags); | |
219 | if (!a[i]) { | |
220 | array_free(a, n); | |
221 | return NULL; | |
222 | } | |
223 | } | |
224 | return a; | |
225 | } | |
226 | ||
c66ac9db NB |
227 | /* core_create_device_list_for_node(): |
228 | * | |
229 | * | |
230 | */ | |
231 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
232 | { | |
233 | struct se_dev_entry *deve; | |
234 | int i; | |
235 | ||
f2083241 JE |
236 | nacl->device_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
237 | sizeof(struct se_dev_entry), GFP_KERNEL); | |
6708bb27 AG |
238 | if (!nacl->device_list) { |
239 | pr_err("Unable to allocate memory for" | |
c66ac9db | 240 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 241 | return -ENOMEM; |
c66ac9db NB |
242 | } |
243 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 244 | deve = nacl->device_list[i]; |
c66ac9db NB |
245 | |
246 | atomic_set(&deve->ua_count, 0); | |
247 | atomic_set(&deve->pr_ref_count, 0); | |
248 | spin_lock_init(&deve->ua_lock); | |
249 | INIT_LIST_HEAD(&deve->alua_port_list); | |
250 | INIT_LIST_HEAD(&deve->ua_list); | |
251 | } | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | /* core_tpg_check_initiator_node_acl() | |
257 | * | |
258 | * | |
259 | */ | |
260 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
261 | struct se_portal_group *tpg, | |
262 | unsigned char *initiatorname) | |
263 | { | |
264 | struct se_node_acl *acl; | |
265 | ||
266 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 267 | if (acl) |
c66ac9db NB |
268 | return acl; |
269 | ||
6708bb27 | 270 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
271 | return NULL; |
272 | ||
e3d6f909 | 273 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 274 | if (!acl) |
c66ac9db NB |
275 | return NULL; |
276 | ||
277 | INIT_LIST_HEAD(&acl->acl_list); | |
278 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 279 | kref_init(&acl->acl_kref); |
01468346 | 280 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
281 | spin_lock_init(&acl->device_list_lock); |
282 | spin_lock_init(&acl->nacl_sess_lock); | |
283 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 284 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
285 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
286 | acl->se_tpg = tpg; | |
287 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
288 | spin_lock_init(&acl->stats_lock); | |
289 | acl->dynamic_node_acl = 1; | |
290 | ||
e3d6f909 | 291 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
292 | |
293 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 294 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
295 | return NULL; |
296 | } | |
297 | ||
298 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
299 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 300 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
301 | return NULL; |
302 | } | |
052605c6 NB |
303 | /* |
304 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 305 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
306 | * tpg_check_demo_mode_login_only() == 1. |
307 | */ | |
cdf88a2f AG |
308 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
309 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
052605c6 | 310 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 311 | |
28638887 | 312 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
313 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
314 | tpg->num_node_acls++; | |
28638887 | 315 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 316 | |
6708bb27 | 317 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
318 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
319 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
320 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
321 | |
322 | return acl; | |
323 | } | |
324 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
325 | ||
326 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
327 | { | |
328 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
329 | cpu_relax(); | |
330 | } | |
331 | ||
c66ac9db NB |
332 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
333 | { | |
28168905 | 334 | int i; |
c66ac9db NB |
335 | struct se_lun *lun; |
336 | ||
337 | spin_lock(&tpg->tpg_lun_lock); | |
338 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 339 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
340 | |
341 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
342 | (lun->lun_se_dev == NULL)) | |
343 | continue; | |
344 | ||
345 | spin_unlock(&tpg->tpg_lun_lock); | |
28168905 | 346 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
347 | spin_lock(&tpg->tpg_lun_lock); |
348 | } | |
349 | spin_unlock(&tpg->tpg_lun_lock); | |
350 | } | |
351 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
352 | ||
353 | /* core_tpg_add_initiator_node_acl(): | |
354 | * | |
355 | * | |
356 | */ | |
357 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
358 | struct se_portal_group *tpg, | |
359 | struct se_node_acl *se_nacl, | |
360 | const char *initiatorname, | |
361 | u32 queue_depth) | |
362 | { | |
363 | struct se_node_acl *acl = NULL; | |
364 | ||
28638887 | 365 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 366 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 367 | if (acl) { |
c66ac9db NB |
368 | if (acl->dynamic_node_acl) { |
369 | acl->dynamic_node_acl = 0; | |
6708bb27 | 370 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
371 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
372 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 373 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
374 | /* |
375 | * Release the locally allocated struct se_node_acl | |
376 | * because * core_tpg_add_initiator_node_acl() returned | |
377 | * a pointer to an existing demo mode node ACL. | |
378 | */ | |
379 | if (se_nacl) | |
e3d6f909 | 380 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
381 | se_nacl); |
382 | goto done; | |
383 | } | |
384 | ||
6708bb27 | 385 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 386 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
387 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
388 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 389 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
390 | return ERR_PTR(-EEXIST); |
391 | } | |
28638887 | 392 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 393 | |
6708bb27 AG |
394 | if (!se_nacl) { |
395 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
396 | return ERR_PTR(-EINVAL); |
397 | } | |
398 | /* | |
399 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
400 | * dependent structure allocated via | |
401 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
402 | */ | |
403 | acl = se_nacl; | |
404 | ||
405 | INIT_LIST_HEAD(&acl->acl_list); | |
406 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 407 | kref_init(&acl->acl_kref); |
01468346 | 408 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
409 | spin_lock_init(&acl->device_list_lock); |
410 | spin_lock_init(&acl->nacl_sess_lock); | |
411 | atomic_set(&acl->acl_pr_ref_count, 0); | |
412 | acl->queue_depth = queue_depth; | |
413 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
414 | acl->se_tpg = tpg; | |
415 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
416 | spin_lock_init(&acl->stats_lock); | |
417 | ||
e3d6f909 | 418 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
419 | |
420 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 421 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
422 | return ERR_PTR(-ENOMEM); |
423 | } | |
424 | ||
425 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
426 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 427 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
428 | return ERR_PTR(-EINVAL); |
429 | } | |
430 | ||
28638887 | 431 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
432 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
433 | tpg->num_node_acls++; | |
28638887 | 434 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
435 | |
436 | done: | |
6708bb27 | 437 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
438 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
439 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
440 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
441 | |
442 | return acl; | |
443 | } | |
444 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
445 | ||
446 | /* core_tpg_del_initiator_node_acl(): | |
447 | * | |
448 | * | |
449 | */ | |
450 | int core_tpg_del_initiator_node_acl( | |
451 | struct se_portal_group *tpg, | |
452 | struct se_node_acl *acl, | |
453 | int force) | |
454 | { | |
337c0607 | 455 | LIST_HEAD(sess_list); |
c66ac9db | 456 | struct se_session *sess, *sess_tmp; |
140854cb | 457 | unsigned long flags; |
28168905 | 458 | int rc; |
c66ac9db | 459 | |
28638887 | 460 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
461 | if (acl->dynamic_node_acl) { |
462 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
463 | } |
464 | list_del(&acl->acl_list); | |
465 | tpg->num_node_acls--; | |
28638887 | 466 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 467 | |
337c0607 NB |
468 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
469 | acl->acl_stop = 1; | |
470 | ||
471 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
472 | sess_acl_list) { | |
473 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
474 | continue; |
475 | ||
337c0607 NB |
476 | target_get_session(sess); |
477 | list_move(&sess->sess_acl_list, &sess_list); | |
478 | } | |
479 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
480 | ||
481 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
482 | list_del(&sess->sess_acl_list); | |
c66ac9db | 483 | |
337c0607 NB |
484 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
485 | target_put_session(sess); | |
486 | if (!rc) | |
487 | continue; | |
488 | target_put_session(sess); | |
c66ac9db | 489 | } |
337c0607 NB |
490 | target_put_nacl(acl); |
491 | /* | |
492 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
493 | * for active fabric session transport_deregister_session() callbacks. | |
494 | */ | |
495 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
496 | |
497 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
498 | core_clear_initiator_node_from_tpg(acl, tpg); |
499 | core_free_device_list_for_node(acl, tpg); | |
500 | ||
6708bb27 | 501 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
502 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
503 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
504 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
505 | |
506 | return 0; | |
507 | } | |
508 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
509 | ||
510 | /* core_tpg_set_initiator_node_queue_depth(): | |
511 | * | |
512 | * | |
513 | */ | |
514 | int core_tpg_set_initiator_node_queue_depth( | |
515 | struct se_portal_group *tpg, | |
516 | unsigned char *initiatorname, | |
517 | u32 queue_depth, | |
518 | int force) | |
519 | { | |
520 | struct se_session *sess, *init_sess = NULL; | |
521 | struct se_node_acl *acl; | |
140854cb | 522 | unsigned long flags; |
c66ac9db NB |
523 | int dynamic_acl = 0; |
524 | ||
28638887 | 525 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 526 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
527 | if (!acl) { |
528 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 529 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
530 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
531 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 532 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
533 | return -ENODEV; |
534 | } | |
535 | if (acl->dynamic_node_acl) { | |
536 | acl->dynamic_node_acl = 0; | |
537 | dynamic_acl = 1; | |
538 | } | |
28638887 | 539 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 540 | |
140854cb | 541 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
542 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
543 | if (sess->se_node_acl != acl) | |
544 | continue; | |
545 | ||
546 | if (!force) { | |
6708bb27 | 547 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
548 | " Initiator Node: %s while session is" |
549 | " operational. To forcefully change the queue" | |
550 | " depth and force session reinstatement" | |
551 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 552 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 553 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 554 | |
28638887 | 555 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
556 | if (dynamic_acl) |
557 | acl->dynamic_node_acl = 1; | |
28638887 | 558 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
559 | return -EEXIST; |
560 | } | |
561 | /* | |
562 | * Determine if the session needs to be closed by our context. | |
563 | */ | |
6708bb27 | 564 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
565 | continue; |
566 | ||
567 | init_sess = sess; | |
568 | break; | |
569 | } | |
570 | ||
571 | /* | |
572 | * User has requested to change the queue depth for a Initiator Node. | |
573 | * Change the value in the Node's struct se_node_acl, and call | |
574 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
575 | * | |
e3d6f909 | 576 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
577 | * reinstatement to occur if there is an active session for the |
578 | * $FABRIC_MOD Initiator Node in question. | |
579 | */ | |
580 | acl->queue_depth = queue_depth; | |
581 | ||
582 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 583 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
584 | /* |
585 | * Force session reinstatement if | |
586 | * core_set_queue_depth_for_node() failed, because we assume | |
587 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 588 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
589 | */ |
590 | if (init_sess) | |
e3d6f909 | 591 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 592 | |
28638887 | 593 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
594 | if (dynamic_acl) |
595 | acl->dynamic_node_acl = 1; | |
28638887 | 596 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
597 | return -EINVAL; |
598 | } | |
140854cb | 599 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
600 | /* |
601 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
602 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
603 | */ | |
604 | if (init_sess) | |
e3d6f909 | 605 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 606 | |
bfb9035c | 607 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 608 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
609 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
610 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 611 | |
28638887 | 612 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
613 | if (dynamic_acl) |
614 | acl->dynamic_node_acl = 1; | |
28638887 | 615 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
616 | |
617 | return 0; | |
618 | } | |
619 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
620 | ||
79e62fc3 AG |
621 | /* core_tpg_set_initiator_node_tag(): |
622 | * | |
623 | * Initiator nodeacl tags are not used internally, but may be used by | |
624 | * userspace to emulate aliases or groups. | |
625 | * Returns length of newly-set tag or -EINVAL. | |
626 | */ | |
627 | int core_tpg_set_initiator_node_tag( | |
628 | struct se_portal_group *tpg, | |
629 | struct se_node_acl *acl, | |
630 | const char *new_tag) | |
631 | { | |
632 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
633 | return -EINVAL; | |
634 | ||
635 | if (!strncmp("NULL", new_tag, 4)) { | |
636 | acl->acl_tag[0] = '\0'; | |
637 | return 0; | |
638 | } | |
639 | ||
640 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
641 | } | |
642 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
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); | |
657 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
658 | spin_lock_init(&lun->lun_acl_lock); | |
659 | spin_lock_init(&lun->lun_cmd_lock); | |
660 | spin_lock_init(&lun->lun_sep_lock); | |
661 | ||
662 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
663 | if (ret < 0) | |
e3d6f909 | 664 | return ret; |
c66ac9db NB |
665 | |
666 | return 0; | |
667 | } | |
668 | ||
669 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
670 | { | |
671 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
672 | ||
673 | core_tpg_post_dellun(se_tpg, lun); | |
674 | } | |
675 | ||
676 | int core_tpg_register( | |
677 | struct target_core_fabric_ops *tfo, | |
678 | struct se_wwn *se_wwn, | |
679 | struct se_portal_group *se_tpg, | |
680 | void *tpg_fabric_ptr, | |
681 | int se_tpg_type) | |
682 | { | |
683 | struct se_lun *lun; | |
684 | u32 i; | |
685 | ||
4a5a75f3 JE |
686 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
687 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
688 | if (!se_tpg->tpg_lun_list) { |
689 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
690 | "tpg_lun_list\n"); |
691 | return -ENOMEM; | |
692 | } | |
693 | ||
694 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 695 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db | 696 | lun->unpacked_lun = i; |
0ff87549 | 697 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
c66ac9db NB |
698 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
699 | atomic_set(&lun->lun_acl_count, 0); | |
700 | init_completion(&lun->lun_shutdown_comp); | |
701 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
702 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
703 | spin_lock_init(&lun->lun_acl_lock); | |
704 | spin_lock_init(&lun->lun_cmd_lock); | |
705 | spin_lock_init(&lun->lun_sep_lock); | |
706 | } | |
707 | ||
708 | se_tpg->se_tpg_type = se_tpg_type; | |
709 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
710 | se_tpg->se_tpg_tfo = tfo; | |
711 | se_tpg->se_tpg_wwn = se_wwn; | |
712 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
713 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 714 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
715 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
716 | spin_lock_init(&se_tpg->acl_node_lock); | |
717 | spin_lock_init(&se_tpg->session_lock); | |
718 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
719 | ||
720 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
721 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
0fb889b8 WY |
722 | array_free(se_tpg->tpg_lun_list, |
723 | TRANSPORT_MAX_LUNS_PER_TPG); | |
c66ac9db NB |
724 | return -ENOMEM; |
725 | } | |
726 | } | |
727 | ||
e3d6f909 AG |
728 | spin_lock_bh(&tpg_lock); |
729 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
730 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 731 | |
6708bb27 | 732 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
733 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
734 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
735 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
736 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
737 | ||
738 | return 0; | |
739 | } | |
740 | EXPORT_SYMBOL(core_tpg_register); | |
741 | ||
742 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
743 | { | |
e89d15ee NB |
744 | struct se_node_acl *nacl, *nacl_tmp; |
745 | ||
6708bb27 | 746 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
747 | " for endpoint: %s Portal Tag %u\n", |
748 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
749 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
750 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
751 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 752 | |
e3d6f909 AG |
753 | spin_lock_bh(&tpg_lock); |
754 | list_del(&se_tpg->se_tpg_node); | |
755 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
756 | |
757 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
758 | cpu_relax(); | |
e89d15ee NB |
759 | /* |
760 | * Release any remaining demo-mode generated se_node_acl that have | |
761 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
762 | * in transport_deregister_session(). | |
763 | */ | |
28638887 | 764 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
765 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
766 | acl_list) { | |
767 | list_del(&nacl->acl_list); | |
768 | se_tpg->num_node_acls--; | |
28638887 | 769 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
770 | |
771 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
772 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 773 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 774 | |
28638887 | 775 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 776 | } |
28638887 | 777 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
778 | |
779 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
780 | core_tpg_release_virtual_lun0(se_tpg); | |
781 | ||
782 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 783 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
784 | return 0; |
785 | } | |
786 | EXPORT_SYMBOL(core_tpg_deregister); | |
787 | ||
788 | struct se_lun *core_tpg_pre_addlun( | |
789 | struct se_portal_group *tpg, | |
790 | u32 unpacked_lun) | |
791 | { | |
792 | struct se_lun *lun; | |
793 | ||
794 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 795 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 796 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 797 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 798 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 799 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
800 | return ERR_PTR(-EOVERFLOW); |
801 | } | |
802 | ||
803 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 804 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 805 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 806 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 807 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
808 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
809 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
810 | spin_unlock(&tpg->tpg_lun_lock); |
811 | return ERR_PTR(-EINVAL); | |
812 | } | |
813 | spin_unlock(&tpg->tpg_lun_lock); | |
814 | ||
815 | return lun; | |
816 | } | |
817 | ||
818 | int core_tpg_post_addlun( | |
819 | struct se_portal_group *tpg, | |
820 | struct se_lun *lun, | |
821 | u32 lun_access, | |
822 | void *lun_ptr) | |
823 | { | |
e3d6f909 AG |
824 | int ret; |
825 | ||
826 | ret = core_dev_export(lun_ptr, tpg, lun); | |
827 | if (ret < 0) | |
828 | return ret; | |
c66ac9db NB |
829 | |
830 | spin_lock(&tpg->tpg_lun_lock); | |
831 | lun->lun_access = lun_access; | |
832 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
833 | spin_unlock(&tpg->tpg_lun_lock); | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
838 | static void core_tpg_shutdown_lun( | |
839 | struct se_portal_group *tpg, | |
840 | struct se_lun *lun) | |
841 | { | |
003bea4a NB |
842 | lun->lun_shutdown = true; |
843 | ||
c66ac9db NB |
844 | core_clear_lun_from_tpg(lun, tpg); |
845 | transport_clear_lun_from_sessions(lun); | |
846 | } | |
847 | ||
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 | } | |
003bea4a | 873 | lun->lun_shutdown = false; |
c66ac9db NB |
874 | spin_unlock(&tpg->tpg_lun_lock); |
875 | ||
876 | return lun; | |
877 | } | |
878 | ||
879 | int core_tpg_post_dellun( | |
880 | struct se_portal_group *tpg, | |
881 | struct se_lun *lun) | |
882 | { | |
883 | core_tpg_shutdown_lun(tpg, lun); | |
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 | } |