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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); | |
e80ac6c4 AG |
80 | core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, |
81 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); | |
c66ac9db | 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 | ||
e80ac6c4 AG |
175 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
176 | lun_access, acl, tpg); | |
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 | ||
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 | */ | |
cdf88a2f AG |
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)) | |
052605c6 | 311 | core_tpg_add_node_to_devs(acl, tpg); |
c66ac9db | 312 | |
28638887 | 313 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
314 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
315 | tpg->num_node_acls++; | |
28638887 | 316 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 317 | |
6708bb27 | 318 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
319 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
320 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
321 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
322 | |
323 | return acl; | |
324 | } | |
325 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
326 | ||
327 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
328 | { | |
329 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
330 | cpu_relax(); | |
331 | } | |
332 | ||
c66ac9db NB |
333 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
334 | { | |
28168905 | 335 | int i; |
c66ac9db NB |
336 | struct se_lun *lun; |
337 | ||
338 | spin_lock(&tpg->tpg_lun_lock); | |
339 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 340 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
341 | |
342 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
343 | (lun->lun_se_dev == NULL)) | |
344 | continue; | |
345 | ||
346 | spin_unlock(&tpg->tpg_lun_lock); | |
28168905 | 347 | core_dev_del_lun(tpg, lun->unpacked_lun); |
c66ac9db NB |
348 | spin_lock(&tpg->tpg_lun_lock); |
349 | } | |
350 | spin_unlock(&tpg->tpg_lun_lock); | |
351 | } | |
352 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
353 | ||
354 | /* core_tpg_add_initiator_node_acl(): | |
355 | * | |
356 | * | |
357 | */ | |
358 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
359 | struct se_portal_group *tpg, | |
360 | struct se_node_acl *se_nacl, | |
361 | const char *initiatorname, | |
362 | u32 queue_depth) | |
363 | { | |
364 | struct se_node_acl *acl = NULL; | |
365 | ||
28638887 | 366 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 367 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 368 | if (acl) { |
c66ac9db NB |
369 | if (acl->dynamic_node_acl) { |
370 | acl->dynamic_node_acl = 0; | |
6708bb27 | 371 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
372 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
373 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 374 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
375 | /* |
376 | * Release the locally allocated struct se_node_acl | |
377 | * because * core_tpg_add_initiator_node_acl() returned | |
378 | * a pointer to an existing demo mode node ACL. | |
379 | */ | |
380 | if (se_nacl) | |
e3d6f909 | 381 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
382 | se_nacl); |
383 | goto done; | |
384 | } | |
385 | ||
6708bb27 | 386 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 387 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
388 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
389 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 390 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
391 | return ERR_PTR(-EEXIST); |
392 | } | |
28638887 | 393 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 394 | |
6708bb27 AG |
395 | if (!se_nacl) { |
396 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
397 | return ERR_PTR(-EINVAL); |
398 | } | |
399 | /* | |
400 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
401 | * dependent structure allocated via | |
402 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
403 | */ | |
404 | acl = se_nacl; | |
405 | ||
406 | INIT_LIST_HEAD(&acl->acl_list); | |
407 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 408 | kref_init(&acl->acl_kref); |
01468346 | 409 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
410 | spin_lock_init(&acl->device_list_lock); |
411 | spin_lock_init(&acl->nacl_sess_lock); | |
412 | atomic_set(&acl->acl_pr_ref_count, 0); | |
413 | acl->queue_depth = queue_depth; | |
414 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
415 | acl->se_tpg = tpg; | |
416 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
417 | spin_lock_init(&acl->stats_lock); | |
418 | ||
e3d6f909 | 419 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
420 | |
421 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 422 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
423 | return ERR_PTR(-ENOMEM); |
424 | } | |
425 | ||
426 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
427 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 428 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
429 | return ERR_PTR(-EINVAL); |
430 | } | |
431 | ||
28638887 | 432 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
433 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
434 | tpg->num_node_acls++; | |
28638887 | 435 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
436 | |
437 | done: | |
6708bb27 | 438 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
439 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
440 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
441 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
442 | |
443 | return acl; | |
444 | } | |
445 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
446 | ||
447 | /* core_tpg_del_initiator_node_acl(): | |
448 | * | |
449 | * | |
450 | */ | |
451 | int core_tpg_del_initiator_node_acl( | |
452 | struct se_portal_group *tpg, | |
453 | struct se_node_acl *acl, | |
454 | int force) | |
455 | { | |
337c0607 | 456 | LIST_HEAD(sess_list); |
c66ac9db | 457 | struct se_session *sess, *sess_tmp; |
140854cb | 458 | unsigned long flags; |
28168905 | 459 | int rc; |
c66ac9db | 460 | |
28638887 | 461 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
462 | if (acl->dynamic_node_acl) { |
463 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
464 | } |
465 | list_del(&acl->acl_list); | |
466 | tpg->num_node_acls--; | |
28638887 | 467 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 468 | |
337c0607 NB |
469 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
470 | acl->acl_stop = 1; | |
471 | ||
472 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
473 | sess_acl_list) { | |
474 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
475 | continue; |
476 | ||
337c0607 NB |
477 | target_get_session(sess); |
478 | list_move(&sess->sess_acl_list, &sess_list); | |
479 | } | |
480 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
481 | ||
482 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
483 | list_del(&sess->sess_acl_list); | |
c66ac9db | 484 | |
337c0607 NB |
485 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
486 | target_put_session(sess); | |
487 | if (!rc) | |
488 | continue; | |
489 | target_put_session(sess); | |
c66ac9db | 490 | } |
337c0607 NB |
491 | target_put_nacl(acl); |
492 | /* | |
493 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
494 | * for active fabric session transport_deregister_session() callbacks. | |
495 | */ | |
496 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
497 | |
498 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
499 | core_clear_initiator_node_from_tpg(acl, tpg); |
500 | core_free_device_list_for_node(acl, tpg); | |
501 | ||
6708bb27 | 502 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
503 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
504 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
505 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
506 | |
507 | return 0; | |
508 | } | |
509 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
510 | ||
511 | /* core_tpg_set_initiator_node_queue_depth(): | |
512 | * | |
513 | * | |
514 | */ | |
515 | int core_tpg_set_initiator_node_queue_depth( | |
516 | struct se_portal_group *tpg, | |
517 | unsigned char *initiatorname, | |
518 | u32 queue_depth, | |
519 | int force) | |
520 | { | |
521 | struct se_session *sess, *init_sess = NULL; | |
522 | struct se_node_acl *acl; | |
140854cb | 523 | unsigned long flags; |
c66ac9db NB |
524 | int dynamic_acl = 0; |
525 | ||
28638887 | 526 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 527 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
528 | if (!acl) { |
529 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 530 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
531 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
532 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 533 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
534 | return -ENODEV; |
535 | } | |
536 | if (acl->dynamic_node_acl) { | |
537 | acl->dynamic_node_acl = 0; | |
538 | dynamic_acl = 1; | |
539 | } | |
28638887 | 540 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 541 | |
140854cb | 542 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
543 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
544 | if (sess->se_node_acl != acl) | |
545 | continue; | |
546 | ||
547 | if (!force) { | |
6708bb27 | 548 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
549 | " Initiator Node: %s while session is" |
550 | " operational. To forcefully change the queue" | |
551 | " depth and force session reinstatement" | |
552 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 553 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 554 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 555 | |
28638887 | 556 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
557 | if (dynamic_acl) |
558 | acl->dynamic_node_acl = 1; | |
28638887 | 559 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
560 | return -EEXIST; |
561 | } | |
562 | /* | |
563 | * Determine if the session needs to be closed by our context. | |
564 | */ | |
6708bb27 | 565 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
566 | continue; |
567 | ||
568 | init_sess = sess; | |
569 | break; | |
570 | } | |
571 | ||
572 | /* | |
573 | * User has requested to change the queue depth for a Initiator Node. | |
574 | * Change the value in the Node's struct se_node_acl, and call | |
575 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
576 | * | |
e3d6f909 | 577 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
578 | * reinstatement to occur if there is an active session for the |
579 | * $FABRIC_MOD Initiator Node in question. | |
580 | */ | |
581 | acl->queue_depth = queue_depth; | |
582 | ||
583 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 584 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
585 | /* |
586 | * Force session reinstatement if | |
587 | * core_set_queue_depth_for_node() failed, because we assume | |
588 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 589 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
590 | */ |
591 | if (init_sess) | |
e3d6f909 | 592 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 593 | |
28638887 | 594 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
595 | if (dynamic_acl) |
596 | acl->dynamic_node_acl = 1; | |
28638887 | 597 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
598 | return -EINVAL; |
599 | } | |
140854cb | 600 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
601 | /* |
602 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
603 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
604 | */ | |
605 | if (init_sess) | |
e3d6f909 | 606 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 607 | |
bfb9035c | 608 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 609 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
610 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
611 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 612 | |
28638887 | 613 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
614 | if (dynamic_acl) |
615 | acl->dynamic_node_acl = 1; | |
28638887 | 616 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
617 | |
618 | return 0; | |
619 | } | |
620 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
621 | ||
622 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
623 | { | |
624 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 625 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
626 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
627 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
628 | int ret; | |
629 | ||
630 | lun->unpacked_lun = 0; | |
631 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
632 | atomic_set(&lun->lun_acl_count, 0); | |
633 | init_completion(&lun->lun_shutdown_comp); | |
634 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
635 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
636 | spin_lock_init(&lun->lun_acl_lock); | |
637 | spin_lock_init(&lun->lun_cmd_lock); | |
638 | spin_lock_init(&lun->lun_sep_lock); | |
639 | ||
640 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
641 | if (ret < 0) | |
e3d6f909 | 642 | return ret; |
c66ac9db NB |
643 | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
648 | { | |
649 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
650 | ||
651 | core_tpg_post_dellun(se_tpg, lun); | |
652 | } | |
653 | ||
654 | int core_tpg_register( | |
655 | struct target_core_fabric_ops *tfo, | |
656 | struct se_wwn *se_wwn, | |
657 | struct se_portal_group *se_tpg, | |
658 | void *tpg_fabric_ptr, | |
659 | int se_tpg_type) | |
660 | { | |
661 | struct se_lun *lun; | |
662 | u32 i; | |
663 | ||
4a5a75f3 JE |
664 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
665 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
666 | if (!se_tpg->tpg_lun_list) { |
667 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
668 | "tpg_lun_list\n"); |
669 | return -ENOMEM; | |
670 | } | |
671 | ||
672 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 673 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db NB |
674 | lun->unpacked_lun = i; |
675 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
676 | atomic_set(&lun->lun_acl_count, 0); | |
677 | init_completion(&lun->lun_shutdown_comp); | |
678 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
679 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
680 | spin_lock_init(&lun->lun_acl_lock); | |
681 | spin_lock_init(&lun->lun_cmd_lock); | |
682 | spin_lock_init(&lun->lun_sep_lock); | |
683 | } | |
684 | ||
685 | se_tpg->se_tpg_type = se_tpg_type; | |
686 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
687 | se_tpg->se_tpg_tfo = tfo; | |
688 | se_tpg->se_tpg_wwn = se_wwn; | |
689 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
690 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 691 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
692 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
693 | spin_lock_init(&se_tpg->acl_node_lock); | |
694 | spin_lock_init(&se_tpg->session_lock); | |
695 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
696 | ||
697 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
698 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
699 | kfree(se_tpg); | |
700 | return -ENOMEM; | |
701 | } | |
702 | } | |
703 | ||
e3d6f909 AG |
704 | spin_lock_bh(&tpg_lock); |
705 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
706 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 707 | |
6708bb27 | 708 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
709 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
710 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
711 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
712 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | EXPORT_SYMBOL(core_tpg_register); | |
717 | ||
718 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
719 | { | |
e89d15ee NB |
720 | struct se_node_acl *nacl, *nacl_tmp; |
721 | ||
6708bb27 | 722 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
723 | " for endpoint: %s Portal Tag %u\n", |
724 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
725 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
726 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
727 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 728 | |
e3d6f909 AG |
729 | spin_lock_bh(&tpg_lock); |
730 | list_del(&se_tpg->se_tpg_node); | |
731 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
732 | |
733 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
734 | cpu_relax(); | |
e89d15ee NB |
735 | /* |
736 | * Release any remaining demo-mode generated se_node_acl that have | |
737 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
738 | * in transport_deregister_session(). | |
739 | */ | |
28638887 | 740 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
741 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
742 | acl_list) { | |
743 | list_del(&nacl->acl_list); | |
744 | se_tpg->num_node_acls--; | |
28638887 | 745 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
746 | |
747 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
748 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 749 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 750 | |
28638887 | 751 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 752 | } |
28638887 | 753 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
754 | |
755 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
756 | core_tpg_release_virtual_lun0(se_tpg); | |
757 | ||
758 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 759 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
760 | return 0; |
761 | } | |
762 | EXPORT_SYMBOL(core_tpg_deregister); | |
763 | ||
764 | struct se_lun *core_tpg_pre_addlun( | |
765 | struct se_portal_group *tpg, | |
766 | u32 unpacked_lun) | |
767 | { | |
768 | struct se_lun *lun; | |
769 | ||
770 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 771 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 772 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 773 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 774 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 775 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
776 | return ERR_PTR(-EOVERFLOW); |
777 | } | |
778 | ||
779 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 780 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 781 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 782 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 783 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
784 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
785 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
786 | spin_unlock(&tpg->tpg_lun_lock); |
787 | return ERR_PTR(-EINVAL); | |
788 | } | |
789 | spin_unlock(&tpg->tpg_lun_lock); | |
790 | ||
791 | return lun; | |
792 | } | |
793 | ||
794 | int core_tpg_post_addlun( | |
795 | struct se_portal_group *tpg, | |
796 | struct se_lun *lun, | |
797 | u32 lun_access, | |
798 | void *lun_ptr) | |
799 | { | |
e3d6f909 AG |
800 | int ret; |
801 | ||
802 | ret = core_dev_export(lun_ptr, tpg, lun); | |
803 | if (ret < 0) | |
804 | return ret; | |
c66ac9db NB |
805 | |
806 | spin_lock(&tpg->tpg_lun_lock); | |
807 | lun->lun_access = lun_access; | |
808 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
809 | spin_unlock(&tpg->tpg_lun_lock); | |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
814 | static void core_tpg_shutdown_lun( | |
815 | struct se_portal_group *tpg, | |
816 | struct se_lun *lun) | |
817 | { | |
818 | core_clear_lun_from_tpg(lun, tpg); | |
819 | transport_clear_lun_from_sessions(lun); | |
820 | } | |
821 | ||
822 | struct se_lun *core_tpg_pre_dellun( | |
823 | struct se_portal_group *tpg, | |
8d9efe53 | 824 | u32 unpacked_lun) |
c66ac9db NB |
825 | { |
826 | struct se_lun *lun; | |
827 | ||
828 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 829 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 830 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 831 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 832 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 833 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
834 | return ERR_PTR(-EOVERFLOW); |
835 | } | |
836 | ||
837 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 838 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 839 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 840 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 841 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
842 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
843 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
844 | spin_unlock(&tpg->tpg_lun_lock); |
845 | return ERR_PTR(-ENODEV); | |
846 | } | |
847 | spin_unlock(&tpg->tpg_lun_lock); | |
848 | ||
849 | return lun; | |
850 | } | |
851 | ||
852 | int core_tpg_post_dellun( | |
853 | struct se_portal_group *tpg, | |
854 | struct se_lun *lun) | |
855 | { | |
856 | core_tpg_shutdown_lun(tpg, lun); | |
857 | ||
858 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
859 | ||
860 | spin_lock(&tpg->tpg_lun_lock); | |
861 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
862 | spin_unlock(&tpg->tpg_lun_lock); | |
863 | ||
864 | return 0; | |
865 | } |