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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 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #include <linux/net.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/spinlock.h> | |
c66ac9db | 34 | #include <linux/in.h> |
c53181af | 35 | #include <linux/export.h> |
c66ac9db NB |
36 | #include <net/sock.h> |
37 | #include <net/tcp.h> | |
38 | #include <scsi/scsi.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | ||
41 | #include <target/target_core_base.h> | |
c4795fb2 CH |
42 | #include <target/target_core_backend.h> |
43 | #include <target/target_core_fabric.h> | |
c66ac9db | 44 | |
e26d99ae | 45 | #include "target_core_internal.h" |
e3d6f909 AG |
46 | |
47 | extern struct se_device *g_lun0_dev; | |
48 | ||
49 | static DEFINE_SPINLOCK(tpg_lock); | |
50 | static LIST_HEAD(tpg_list); | |
c66ac9db NB |
51 | |
52 | /* core_clear_initiator_node_from_tpg(): | |
53 | * | |
54 | * | |
55 | */ | |
56 | static void core_clear_initiator_node_from_tpg( | |
57 | struct se_node_acl *nacl, | |
58 | struct se_portal_group *tpg) | |
59 | { | |
60 | int i; | |
61 | struct se_dev_entry *deve; | |
62 | struct se_lun *lun; | |
c66ac9db NB |
63 | |
64 | spin_lock_irq(&nacl->device_list_lock); | |
65 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
f2083241 | 66 | deve = nacl->device_list[i]; |
c66ac9db NB |
67 | |
68 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
69 | continue; | |
70 | ||
71 | if (!deve->se_lun) { | |
6708bb27 | 72 | pr_err("%s device entries device pointer is" |
c66ac9db | 73 | " NULL, but Initiator has access.\n", |
e3d6f909 | 74 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
75 | continue; |
76 | } | |
77 | ||
78 | lun = deve->se_lun; | |
79 | spin_unlock_irq(&nacl->device_list_lock); | |
80 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, | |
81 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); | |
82 | ||
c66ac9db | 83 | spin_lock_irq(&nacl->device_list_lock); |
c66ac9db NB |
84 | } |
85 | spin_unlock_irq(&nacl->device_list_lock); | |
86 | } | |
87 | ||
88 | /* __core_tpg_get_initiator_node_acl(): | |
89 | * | |
90 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling | |
91 | */ | |
92 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
93 | struct se_portal_group *tpg, | |
94 | const char *initiatorname) | |
95 | { | |
96 | struct se_node_acl *acl; | |
97 | ||
98 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 99 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
100 | return acl; |
101 | } | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
106 | /* core_tpg_get_initiator_node_acl(): | |
107 | * | |
108 | * | |
109 | */ | |
110 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
111 | struct se_portal_group *tpg, | |
112 | unsigned char *initiatorname) | |
113 | { | |
114 | struct se_node_acl *acl; | |
115 | ||
28638887 | 116 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 117 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
6708bb27 AG |
118 | if (!strcmp(acl->initiatorname, initiatorname) && |
119 | !acl->dynamic_node_acl) { | |
28638887 | 120 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
121 | return acl; |
122 | } | |
123 | } | |
28638887 | 124 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
125 | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | /* core_tpg_add_node_to_devs(): | |
130 | * | |
131 | * | |
132 | */ | |
133 | void core_tpg_add_node_to_devs( | |
134 | struct se_node_acl *acl, | |
135 | struct se_portal_group *tpg) | |
136 | { | |
137 | int i = 0; | |
138 | u32 lun_access = 0; | |
139 | struct se_lun *lun; | |
140 | struct se_device *dev; | |
141 | ||
142 | spin_lock(&tpg->tpg_lun_lock); | |
143 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 144 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
145 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
146 | continue; | |
147 | ||
148 | spin_unlock(&tpg->tpg_lun_lock); | |
149 | ||
150 | dev = lun->lun_se_dev; | |
151 | /* | |
152 | * By default in LIO-Target $FABRIC_MOD, | |
153 | * demo_mode_write_protect is ON, or READ_ONLY; | |
154 | */ | |
6708bb27 | 155 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 156 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
157 | } else { |
158 | /* | |
159 | * Allow only optical drives to issue R/W in default RO | |
160 | * demo mode. | |
161 | */ | |
e3d6f909 | 162 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
163 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
164 | else | |
165 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
166 | } | |
167 | ||
6708bb27 | 168 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 169 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
170 | tpg->se_tpg_tfo->get_fabric_name(), |
171 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
172 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
173 | "READ-WRITE" : "READ-ONLY"); | |
174 | ||
175 | core_update_device_list_for_node(lun, NULL, lun->unpacked_lun, | |
176 | lun_access, acl, tpg, 1); | |
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 | ||
257 | /* core_tpg_check_initiator_node_acl() | |
258 | * | |
259 | * | |
260 | */ | |
261 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
262 | struct se_portal_group *tpg, | |
263 | unsigned char *initiatorname) | |
264 | { | |
265 | struct se_node_acl *acl; | |
266 | ||
267 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 268 | if (acl) |
c66ac9db NB |
269 | return acl; |
270 | ||
6708bb27 | 271 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
272 | return NULL; |
273 | ||
e3d6f909 | 274 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 275 | if (!acl) |
c66ac9db NB |
276 | return NULL; |
277 | ||
278 | INIT_LIST_HEAD(&acl->acl_list); | |
279 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 280 | kref_init(&acl->acl_kref); |
01468346 | 281 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
282 | spin_lock_init(&acl->device_list_lock); |
283 | spin_lock_init(&acl->nacl_sess_lock); | |
284 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 285 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
286 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
287 | acl->se_tpg = tpg; | |
288 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
289 | spin_lock_init(&acl->stats_lock); | |
290 | acl->dynamic_node_acl = 1; | |
291 | ||
e3d6f909 | 292 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
293 | |
294 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 295 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
296 | return NULL; |
297 | } | |
298 | ||
299 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
300 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 301 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
302 | return NULL; |
303 | } | |
052605c6 NB |
304 | /* |
305 | * Here we only create demo-mode MappedLUNs from the active | |
306 | * TPG LUNs if the fabric is not explictly asking for | |
307 | * tpg_check_demo_mode_login_only() == 1. | |
308 | */ | |
309 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && | |
310 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) | |
311 | do { ; } while (0); | |
312 | else | |
313 | core_tpg_add_node_to_devs(acl, tpg); | |
c66ac9db | 314 | |
28638887 | 315 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
316 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
317 | tpg->num_node_acls++; | |
28638887 | 318 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 319 | |
6708bb27 | 320 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
321 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
322 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
323 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
324 | |
325 | return acl; | |
326 | } | |
327 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
328 | ||
329 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
330 | { | |
331 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
332 | cpu_relax(); | |
333 | } | |
334 | ||
c66ac9db NB |
335 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
336 | { | |
28168905 | 337 | int i; |
c66ac9db NB |
338 | struct se_lun *lun; |
339 | ||
340 | spin_lock(&tpg->tpg_lun_lock); | |
341 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 342 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
343 | |
344 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
345 | (lun->lun_se_dev == NULL)) | |
346 | continue; | |
347 | ||
348 | spin_unlock(&tpg->tpg_lun_lock); | |
28168905 | 349 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
350 | spin_lock(&tpg->tpg_lun_lock); |
351 | } | |
352 | spin_unlock(&tpg->tpg_lun_lock); | |
353 | } | |
354 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
355 | ||
356 | /* core_tpg_add_initiator_node_acl(): | |
357 | * | |
358 | * | |
359 | */ | |
360 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
361 | struct se_portal_group *tpg, | |
362 | struct se_node_acl *se_nacl, | |
363 | const char *initiatorname, | |
364 | u32 queue_depth) | |
365 | { | |
366 | struct se_node_acl *acl = NULL; | |
367 | ||
28638887 | 368 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 369 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 370 | if (acl) { |
c66ac9db NB |
371 | if (acl->dynamic_node_acl) { |
372 | acl->dynamic_node_acl = 0; | |
6708bb27 | 373 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
374 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
375 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 376 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
377 | /* |
378 | * Release the locally allocated struct se_node_acl | |
379 | * because * core_tpg_add_initiator_node_acl() returned | |
380 | * a pointer to an existing demo mode node ACL. | |
381 | */ | |
382 | if (se_nacl) | |
e3d6f909 | 383 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
384 | se_nacl); |
385 | goto done; | |
386 | } | |
387 | ||
6708bb27 | 388 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 389 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
390 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
391 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 392 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
393 | return ERR_PTR(-EEXIST); |
394 | } | |
28638887 | 395 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 396 | |
6708bb27 AG |
397 | if (!se_nacl) { |
398 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
399 | return ERR_PTR(-EINVAL); |
400 | } | |
401 | /* | |
402 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
403 | * dependent structure allocated via | |
404 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
405 | */ | |
406 | acl = se_nacl; | |
407 | ||
408 | INIT_LIST_HEAD(&acl->acl_list); | |
409 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 410 | kref_init(&acl->acl_kref); |
01468346 | 411 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
412 | spin_lock_init(&acl->device_list_lock); |
413 | spin_lock_init(&acl->nacl_sess_lock); | |
414 | atomic_set(&acl->acl_pr_ref_count, 0); | |
415 | acl->queue_depth = queue_depth; | |
416 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
417 | acl->se_tpg = tpg; | |
418 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
419 | spin_lock_init(&acl->stats_lock); | |
420 | ||
e3d6f909 | 421 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
422 | |
423 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 424 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
425 | return ERR_PTR(-ENOMEM); |
426 | } | |
427 | ||
428 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
429 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 430 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
431 | return ERR_PTR(-EINVAL); |
432 | } | |
433 | ||
28638887 | 434 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
435 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
436 | tpg->num_node_acls++; | |
28638887 | 437 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
438 | |
439 | done: | |
6708bb27 | 440 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
441 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
442 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
443 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
444 | |
445 | return acl; | |
446 | } | |
447 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
448 | ||
449 | /* core_tpg_del_initiator_node_acl(): | |
450 | * | |
451 | * | |
452 | */ | |
453 | int core_tpg_del_initiator_node_acl( | |
454 | struct se_portal_group *tpg, | |
455 | struct se_node_acl *acl, | |
456 | int force) | |
457 | { | |
337c0607 | 458 | LIST_HEAD(sess_list); |
c66ac9db | 459 | struct se_session *sess, *sess_tmp; |
140854cb | 460 | unsigned long flags; |
28168905 | 461 | int rc; |
c66ac9db | 462 | |
28638887 | 463 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
464 | if (acl->dynamic_node_acl) { |
465 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
466 | } |
467 | list_del(&acl->acl_list); | |
468 | tpg->num_node_acls--; | |
28638887 | 469 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 470 | |
337c0607 NB |
471 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
472 | acl->acl_stop = 1; | |
473 | ||
474 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
475 | sess_acl_list) { | |
476 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
477 | continue; |
478 | ||
337c0607 NB |
479 | target_get_session(sess); |
480 | list_move(&sess->sess_acl_list, &sess_list); | |
481 | } | |
482 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
483 | ||
484 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
485 | list_del(&sess->sess_acl_list); | |
c66ac9db | 486 | |
337c0607 NB |
487 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
488 | target_put_session(sess); | |
489 | if (!rc) | |
490 | continue; | |
491 | target_put_session(sess); | |
c66ac9db | 492 | } |
337c0607 NB |
493 | target_put_nacl(acl); |
494 | /* | |
495 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
496 | * for active fabric session transport_deregister_session() callbacks. | |
497 | */ | |
498 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
499 | |
500 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
501 | core_clear_initiator_node_from_tpg(acl, tpg); |
502 | core_free_device_list_for_node(acl, tpg); | |
503 | ||
6708bb27 | 504 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
505 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
506 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
507 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
508 | |
509 | return 0; | |
510 | } | |
511 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
512 | ||
513 | /* core_tpg_set_initiator_node_queue_depth(): | |
514 | * | |
515 | * | |
516 | */ | |
517 | int core_tpg_set_initiator_node_queue_depth( | |
518 | struct se_portal_group *tpg, | |
519 | unsigned char *initiatorname, | |
520 | u32 queue_depth, | |
521 | int force) | |
522 | { | |
523 | struct se_session *sess, *init_sess = NULL; | |
524 | struct se_node_acl *acl; | |
140854cb | 525 | unsigned long flags; |
c66ac9db NB |
526 | int dynamic_acl = 0; |
527 | ||
28638887 | 528 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 529 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
530 | if (!acl) { |
531 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 532 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
533 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
534 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 535 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
536 | return -ENODEV; |
537 | } | |
538 | if (acl->dynamic_node_acl) { | |
539 | acl->dynamic_node_acl = 0; | |
540 | dynamic_acl = 1; | |
541 | } | |
28638887 | 542 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 543 | |
140854cb | 544 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
545 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
546 | if (sess->se_node_acl != acl) | |
547 | continue; | |
548 | ||
549 | if (!force) { | |
6708bb27 | 550 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
551 | " Initiator Node: %s while session is" |
552 | " operational. To forcefully change the queue" | |
553 | " depth and force session reinstatement" | |
554 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 555 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 556 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 557 | |
28638887 | 558 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
559 | if (dynamic_acl) |
560 | acl->dynamic_node_acl = 1; | |
28638887 | 561 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
562 | return -EEXIST; |
563 | } | |
564 | /* | |
565 | * Determine if the session needs to be closed by our context. | |
566 | */ | |
6708bb27 | 567 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
568 | continue; |
569 | ||
570 | init_sess = sess; | |
571 | break; | |
572 | } | |
573 | ||
574 | /* | |
575 | * User has requested to change the queue depth for a Initiator Node. | |
576 | * Change the value in the Node's struct se_node_acl, and call | |
577 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
578 | * | |
e3d6f909 | 579 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
580 | * reinstatement to occur if there is an active session for the |
581 | * $FABRIC_MOD Initiator Node in question. | |
582 | */ | |
583 | acl->queue_depth = queue_depth; | |
584 | ||
585 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 586 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
587 | /* |
588 | * Force session reinstatement if | |
589 | * core_set_queue_depth_for_node() failed, because we assume | |
590 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 591 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
592 | */ |
593 | if (init_sess) | |
e3d6f909 | 594 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 595 | |
28638887 | 596 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
597 | if (dynamic_acl) |
598 | acl->dynamic_node_acl = 1; | |
28638887 | 599 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
600 | return -EINVAL; |
601 | } | |
140854cb | 602 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
603 | /* |
604 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
605 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
606 | */ | |
607 | if (init_sess) | |
e3d6f909 | 608 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 609 | |
bfb9035c | 610 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 611 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
612 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
613 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 614 | |
28638887 | 615 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
616 | if (dynamic_acl) |
617 | acl->dynamic_node_acl = 1; | |
28638887 | 618 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
619 | |
620 | return 0; | |
621 | } | |
622 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
623 | ||
624 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
625 | { | |
626 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 627 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
628 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
629 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
630 | int ret; | |
631 | ||
632 | lun->unpacked_lun = 0; | |
633 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
634 | atomic_set(&lun->lun_acl_count, 0); | |
635 | init_completion(&lun->lun_shutdown_comp); | |
636 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
637 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
638 | spin_lock_init(&lun->lun_acl_lock); | |
639 | spin_lock_init(&lun->lun_cmd_lock); | |
640 | spin_lock_init(&lun->lun_sep_lock); | |
641 | ||
642 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
643 | if (ret < 0) | |
e3d6f909 | 644 | return ret; |
c66ac9db NB |
645 | |
646 | return 0; | |
647 | } | |
648 | ||
649 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
650 | { | |
651 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
652 | ||
653 | core_tpg_post_dellun(se_tpg, lun); | |
654 | } | |
655 | ||
656 | int core_tpg_register( | |
657 | struct target_core_fabric_ops *tfo, | |
658 | struct se_wwn *se_wwn, | |
659 | struct se_portal_group *se_tpg, | |
660 | void *tpg_fabric_ptr, | |
661 | int se_tpg_type) | |
662 | { | |
663 | struct se_lun *lun; | |
664 | u32 i; | |
665 | ||
4a5a75f3 JE |
666 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
667 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
668 | if (!se_tpg->tpg_lun_list) { |
669 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
670 | "tpg_lun_list\n"); |
671 | return -ENOMEM; | |
672 | } | |
673 | ||
674 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 675 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db NB |
676 | lun->unpacked_lun = i; |
677 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
678 | atomic_set(&lun->lun_acl_count, 0); | |
679 | init_completion(&lun->lun_shutdown_comp); | |
680 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
681 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
682 | spin_lock_init(&lun->lun_acl_lock); | |
683 | spin_lock_init(&lun->lun_cmd_lock); | |
684 | spin_lock_init(&lun->lun_sep_lock); | |
685 | } | |
686 | ||
687 | se_tpg->se_tpg_type = se_tpg_type; | |
688 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
689 | se_tpg->se_tpg_tfo = tfo; | |
690 | se_tpg->se_tpg_wwn = se_wwn; | |
691 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
692 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 693 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
694 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
695 | spin_lock_init(&se_tpg->acl_node_lock); | |
696 | spin_lock_init(&se_tpg->session_lock); | |
697 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
698 | ||
699 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
700 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
701 | kfree(se_tpg); | |
702 | return -ENOMEM; | |
703 | } | |
704 | } | |
705 | ||
e3d6f909 AG |
706 | spin_lock_bh(&tpg_lock); |
707 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
708 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 709 | |
6708bb27 | 710 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
711 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
712 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
713 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
714 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | EXPORT_SYMBOL(core_tpg_register); | |
719 | ||
720 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
721 | { | |
e89d15ee NB |
722 | struct se_node_acl *nacl, *nacl_tmp; |
723 | ||
6708bb27 | 724 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
725 | " for endpoint: %s Portal Tag %u\n", |
726 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
727 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
728 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
729 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 730 | |
e3d6f909 AG |
731 | spin_lock_bh(&tpg_lock); |
732 | list_del(&se_tpg->se_tpg_node); | |
733 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
734 | |
735 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
736 | cpu_relax(); | |
e89d15ee NB |
737 | /* |
738 | * Release any remaining demo-mode generated se_node_acl that have | |
739 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
740 | * in transport_deregister_session(). | |
741 | */ | |
28638887 | 742 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
743 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
744 | acl_list) { | |
745 | list_del(&nacl->acl_list); | |
746 | se_tpg->num_node_acls--; | |
28638887 | 747 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
748 | |
749 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
750 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 751 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 752 | |
28638887 | 753 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 754 | } |
28638887 | 755 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
756 | |
757 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
758 | core_tpg_release_virtual_lun0(se_tpg); | |
759 | ||
760 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 761 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
762 | return 0; |
763 | } | |
764 | EXPORT_SYMBOL(core_tpg_deregister); | |
765 | ||
766 | struct se_lun *core_tpg_pre_addlun( | |
767 | struct se_portal_group *tpg, | |
768 | u32 unpacked_lun) | |
769 | { | |
770 | struct se_lun *lun; | |
771 | ||
772 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 773 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 774 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 775 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 776 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 777 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
778 | return ERR_PTR(-EOVERFLOW); |
779 | } | |
780 | ||
781 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 782 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 783 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 784 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 785 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
786 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
787 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
788 | spin_unlock(&tpg->tpg_lun_lock); |
789 | return ERR_PTR(-EINVAL); | |
790 | } | |
791 | spin_unlock(&tpg->tpg_lun_lock); | |
792 | ||
793 | return lun; | |
794 | } | |
795 | ||
796 | int core_tpg_post_addlun( | |
797 | struct se_portal_group *tpg, | |
798 | struct se_lun *lun, | |
799 | u32 lun_access, | |
800 | void *lun_ptr) | |
801 | { | |
e3d6f909 AG |
802 | int ret; |
803 | ||
804 | ret = core_dev_export(lun_ptr, tpg, lun); | |
805 | if (ret < 0) | |
806 | return ret; | |
c66ac9db NB |
807 | |
808 | spin_lock(&tpg->tpg_lun_lock); | |
809 | lun->lun_access = lun_access; | |
810 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
811 | spin_unlock(&tpg->tpg_lun_lock); | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static void core_tpg_shutdown_lun( | |
817 | struct se_portal_group *tpg, | |
818 | struct se_lun *lun) | |
819 | { | |
820 | core_clear_lun_from_tpg(lun, tpg); | |
821 | transport_clear_lun_from_sessions(lun); | |
822 | } | |
823 | ||
824 | struct se_lun *core_tpg_pre_dellun( | |
825 | struct se_portal_group *tpg, | |
8d9efe53 | 826 | u32 unpacked_lun) |
c66ac9db NB |
827 | { |
828 | struct se_lun *lun; | |
829 | ||
830 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 831 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 832 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 833 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 834 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 835 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
836 | return ERR_PTR(-EOVERFLOW); |
837 | } | |
838 | ||
839 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 840 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 841 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 842 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 843 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
844 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
845 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
846 | spin_unlock(&tpg->tpg_lun_lock); |
847 | return ERR_PTR(-ENODEV); | |
848 | } | |
849 | spin_unlock(&tpg->tpg_lun_lock); | |
850 | ||
851 | return lun; | |
852 | } | |
853 | ||
854 | int core_tpg_post_dellun( | |
855 | struct se_portal_group *tpg, | |
856 | struct se_lun *lun) | |
857 | { | |
858 | core_tpg_shutdown_lun(tpg, lun); | |
859 | ||
860 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
861 | ||
862 | spin_lock(&tpg->tpg_lun_lock); | |
863 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
864 | spin_unlock(&tpg->tpg_lun_lock); | |
865 | ||
866 | return 0; | |
867 | } |