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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; | |
63 | struct se_lun_acl *acl, *acl_tmp; | |
64 | ||
65 | spin_lock_irq(&nacl->device_list_lock); | |
66 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
67 | deve = &nacl->device_list[i]; | |
68 | ||
69 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
70 | continue; | |
71 | ||
72 | if (!deve->se_lun) { | |
6708bb27 | 73 | pr_err("%s device entries device pointer is" |
c66ac9db | 74 | " NULL, but Initiator has access.\n", |
e3d6f909 | 75 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
76 | continue; |
77 | } | |
78 | ||
79 | lun = deve->se_lun; | |
80 | spin_unlock_irq(&nacl->device_list_lock); | |
81 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, | |
82 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); | |
83 | ||
84 | spin_lock(&lun->lun_acl_lock); | |
85 | list_for_each_entry_safe(acl, acl_tmp, | |
86 | &lun->lun_acl_list, lacl_list) { | |
6708bb27 AG |
87 | if (!strcmp(acl->initiatorname, nacl->initiatorname) && |
88 | (acl->mapped_lun == deve->mapped_lun)) | |
c66ac9db NB |
89 | break; |
90 | } | |
91 | ||
92 | if (!acl) { | |
6708bb27 | 93 | pr_err("Unable to locate struct se_lun_acl for %s," |
c66ac9db NB |
94 | " mapped_lun: %u\n", nacl->initiatorname, |
95 | deve->mapped_lun); | |
96 | spin_unlock(&lun->lun_acl_lock); | |
97 | spin_lock_irq(&nacl->device_list_lock); | |
98 | continue; | |
99 | } | |
100 | ||
101 | list_del(&acl->lacl_list); | |
102 | spin_unlock(&lun->lun_acl_lock); | |
103 | ||
104 | spin_lock_irq(&nacl->device_list_lock); | |
105 | kfree(acl); | |
106 | } | |
107 | spin_unlock_irq(&nacl->device_list_lock); | |
108 | } | |
109 | ||
110 | /* __core_tpg_get_initiator_node_acl(): | |
111 | * | |
112 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling | |
113 | */ | |
114 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
115 | struct se_portal_group *tpg, | |
116 | const char *initiatorname) | |
117 | { | |
118 | struct se_node_acl *acl; | |
119 | ||
120 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 121 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
122 | return acl; |
123 | } | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
128 | /* core_tpg_get_initiator_node_acl(): | |
129 | * | |
130 | * | |
131 | */ | |
132 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
133 | struct se_portal_group *tpg, | |
134 | unsigned char *initiatorname) | |
135 | { | |
136 | struct se_node_acl *acl; | |
137 | ||
28638887 | 138 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 139 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
6708bb27 AG |
140 | if (!strcmp(acl->initiatorname, initiatorname) && |
141 | !acl->dynamic_node_acl) { | |
28638887 | 142 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
143 | return acl; |
144 | } | |
145 | } | |
28638887 | 146 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
147 | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | /* core_tpg_add_node_to_devs(): | |
152 | * | |
153 | * | |
154 | */ | |
155 | void core_tpg_add_node_to_devs( | |
156 | struct se_node_acl *acl, | |
157 | struct se_portal_group *tpg) | |
158 | { | |
159 | int i = 0; | |
160 | u32 lun_access = 0; | |
161 | struct se_lun *lun; | |
162 | struct se_device *dev; | |
163 | ||
164 | spin_lock(&tpg->tpg_lun_lock); | |
165 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 166 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
167 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
168 | continue; | |
169 | ||
170 | spin_unlock(&tpg->tpg_lun_lock); | |
171 | ||
172 | dev = lun->lun_se_dev; | |
173 | /* | |
174 | * By default in LIO-Target $FABRIC_MOD, | |
175 | * demo_mode_write_protect is ON, or READ_ONLY; | |
176 | */ | |
6708bb27 | 177 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
c66ac9db NB |
178 | if (dev->dev_flags & DF_READ_ONLY) |
179 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
180 | else | |
181 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
182 | } else { | |
183 | /* | |
184 | * Allow only optical drives to issue R/W in default RO | |
185 | * demo mode. | |
186 | */ | |
e3d6f909 | 187 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
188 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
189 | else | |
190 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
191 | } | |
192 | ||
6708bb27 | 193 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 194 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
195 | tpg->se_tpg_tfo->get_fabric_name(), |
196 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
197 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
198 | "READ-WRITE" : "READ-ONLY"); | |
199 | ||
200 | core_update_device_list_for_node(lun, NULL, lun->unpacked_lun, | |
201 | lun_access, acl, tpg, 1); | |
202 | spin_lock(&tpg->tpg_lun_lock); | |
203 | } | |
204 | spin_unlock(&tpg->tpg_lun_lock); | |
205 | } | |
206 | ||
207 | /* core_set_queue_depth_for_node(): | |
208 | * | |
209 | * | |
210 | */ | |
211 | static int core_set_queue_depth_for_node( | |
212 | struct se_portal_group *tpg, | |
213 | struct se_node_acl *acl) | |
214 | { | |
215 | if (!acl->queue_depth) { | |
6708bb27 | 216 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 217 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
218 | acl->initiatorname); |
219 | acl->queue_depth = 1; | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
4a5a75f3 JE |
225 | void array_free(void *array, int n) |
226 | { | |
227 | void **a = array; | |
228 | int i; | |
229 | ||
230 | for (i = 0; i < n; i++) | |
231 | kfree(a[i]); | |
232 | kfree(a); | |
233 | } | |
234 | ||
235 | static void *array_zalloc(int n, size_t size, gfp_t flags) | |
236 | { | |
237 | void **a; | |
238 | int i; | |
239 | ||
240 | a = kzalloc(n * sizeof(void*), flags); | |
241 | if (!a) | |
242 | return NULL; | |
243 | for (i = 0; i < n; i++) { | |
244 | a[i] = kzalloc(size, flags); | |
245 | if (!a[i]) { | |
246 | array_free(a, n); | |
247 | return NULL; | |
248 | } | |
249 | } | |
250 | return a; | |
251 | } | |
252 | ||
c66ac9db NB |
253 | /* core_create_device_list_for_node(): |
254 | * | |
255 | * | |
256 | */ | |
257 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
258 | { | |
259 | struct se_dev_entry *deve; | |
260 | int i; | |
261 | ||
262 | nacl->device_list = kzalloc(sizeof(struct se_dev_entry) * | |
263 | TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL); | |
6708bb27 AG |
264 | if (!nacl->device_list) { |
265 | pr_err("Unable to allocate memory for" | |
c66ac9db | 266 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 267 | return -ENOMEM; |
c66ac9db NB |
268 | } |
269 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
270 | deve = &nacl->device_list[i]; | |
271 | ||
272 | atomic_set(&deve->ua_count, 0); | |
273 | atomic_set(&deve->pr_ref_count, 0); | |
274 | spin_lock_init(&deve->ua_lock); | |
275 | INIT_LIST_HEAD(&deve->alua_port_list); | |
276 | INIT_LIST_HEAD(&deve->ua_list); | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | /* core_tpg_check_initiator_node_acl() | |
283 | * | |
284 | * | |
285 | */ | |
286 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
287 | struct se_portal_group *tpg, | |
288 | unsigned char *initiatorname) | |
289 | { | |
290 | struct se_node_acl *acl; | |
291 | ||
292 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 293 | if (acl) |
c66ac9db NB |
294 | return acl; |
295 | ||
6708bb27 | 296 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
297 | return NULL; |
298 | ||
e3d6f909 | 299 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 300 | if (!acl) |
c66ac9db NB |
301 | return NULL; |
302 | ||
303 | INIT_LIST_HEAD(&acl->acl_list); | |
304 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 305 | kref_init(&acl->acl_kref); |
01468346 | 306 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
307 | spin_lock_init(&acl->device_list_lock); |
308 | spin_lock_init(&acl->nacl_sess_lock); | |
309 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 310 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
311 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
312 | acl->se_tpg = tpg; | |
313 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
314 | spin_lock_init(&acl->stats_lock); | |
315 | acl->dynamic_node_acl = 1; | |
316 | ||
e3d6f909 | 317 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
318 | |
319 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 320 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
321 | return NULL; |
322 | } | |
323 | ||
324 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
325 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 326 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
327 | return NULL; |
328 | } | |
052605c6 NB |
329 | /* |
330 | * Here we only create demo-mode MappedLUNs from the active | |
331 | * TPG LUNs if the fabric is not explictly asking for | |
332 | * tpg_check_demo_mode_login_only() == 1. | |
333 | */ | |
334 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && | |
335 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) | |
336 | do { ; } while (0); | |
337 | else | |
338 | core_tpg_add_node_to_devs(acl, tpg); | |
c66ac9db | 339 | |
28638887 | 340 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
341 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
342 | tpg->num_node_acls++; | |
28638887 | 343 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 344 | |
6708bb27 | 345 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
346 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
347 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
348 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
349 | |
350 | return acl; | |
351 | } | |
352 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
353 | ||
354 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
355 | { | |
356 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
357 | cpu_relax(); | |
358 | } | |
359 | ||
c66ac9db NB |
360 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
361 | { | |
362 | int i, ret; | |
363 | struct se_lun *lun; | |
364 | ||
365 | spin_lock(&tpg->tpg_lun_lock); | |
366 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 367 | lun = tpg->tpg_lun_list[i]; |
c66ac9db NB |
368 | |
369 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
370 | (lun->lun_se_dev == NULL)) | |
371 | continue; | |
372 | ||
373 | spin_unlock(&tpg->tpg_lun_lock); | |
374 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); | |
375 | spin_lock(&tpg->tpg_lun_lock); | |
376 | } | |
377 | spin_unlock(&tpg->tpg_lun_lock); | |
378 | } | |
379 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
380 | ||
381 | /* core_tpg_add_initiator_node_acl(): | |
382 | * | |
383 | * | |
384 | */ | |
385 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
386 | struct se_portal_group *tpg, | |
387 | struct se_node_acl *se_nacl, | |
388 | const char *initiatorname, | |
389 | u32 queue_depth) | |
390 | { | |
391 | struct se_node_acl *acl = NULL; | |
392 | ||
28638887 | 393 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 394 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 395 | if (acl) { |
c66ac9db NB |
396 | if (acl->dynamic_node_acl) { |
397 | acl->dynamic_node_acl = 0; | |
6708bb27 | 398 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
399 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
400 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 401 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
402 | /* |
403 | * Release the locally allocated struct se_node_acl | |
404 | * because * core_tpg_add_initiator_node_acl() returned | |
405 | * a pointer to an existing demo mode node ACL. | |
406 | */ | |
407 | if (se_nacl) | |
e3d6f909 | 408 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
409 | se_nacl); |
410 | goto done; | |
411 | } | |
412 | ||
6708bb27 | 413 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 414 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
415 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
416 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 417 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
418 | return ERR_PTR(-EEXIST); |
419 | } | |
28638887 | 420 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 421 | |
6708bb27 AG |
422 | if (!se_nacl) { |
423 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
424 | return ERR_PTR(-EINVAL); |
425 | } | |
426 | /* | |
427 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
428 | * dependent structure allocated via | |
429 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
430 | */ | |
431 | acl = se_nacl; | |
432 | ||
433 | INIT_LIST_HEAD(&acl->acl_list); | |
434 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 435 | kref_init(&acl->acl_kref); |
01468346 | 436 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
437 | spin_lock_init(&acl->device_list_lock); |
438 | spin_lock_init(&acl->nacl_sess_lock); | |
439 | atomic_set(&acl->acl_pr_ref_count, 0); | |
440 | acl->queue_depth = queue_depth; | |
441 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
442 | acl->se_tpg = tpg; | |
443 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
444 | spin_lock_init(&acl->stats_lock); | |
445 | ||
e3d6f909 | 446 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
447 | |
448 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 449 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
450 | return ERR_PTR(-ENOMEM); |
451 | } | |
452 | ||
453 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
454 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 455 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
456 | return ERR_PTR(-EINVAL); |
457 | } | |
458 | ||
28638887 | 459 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
460 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
461 | tpg->num_node_acls++; | |
28638887 | 462 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
463 | |
464 | done: | |
6708bb27 | 465 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
466 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
467 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
468 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
469 | |
470 | return acl; | |
471 | } | |
472 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
473 | ||
474 | /* core_tpg_del_initiator_node_acl(): | |
475 | * | |
476 | * | |
477 | */ | |
478 | int core_tpg_del_initiator_node_acl( | |
479 | struct se_portal_group *tpg, | |
480 | struct se_node_acl *acl, | |
481 | int force) | |
482 | { | |
337c0607 | 483 | LIST_HEAD(sess_list); |
c66ac9db | 484 | struct se_session *sess, *sess_tmp; |
140854cb | 485 | unsigned long flags; |
337c0607 | 486 | int dynamic_acl = 0, rc; |
c66ac9db | 487 | |
28638887 | 488 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
489 | if (acl->dynamic_node_acl) { |
490 | acl->dynamic_node_acl = 0; | |
491 | dynamic_acl = 1; | |
492 | } | |
493 | list_del(&acl->acl_list); | |
494 | tpg->num_node_acls--; | |
28638887 | 495 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 496 | |
337c0607 NB |
497 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
498 | acl->acl_stop = 1; | |
499 | ||
500 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
501 | sess_acl_list) { | |
502 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
503 | continue; |
504 | ||
337c0607 NB |
505 | target_get_session(sess); |
506 | list_move(&sess->sess_acl_list, &sess_list); | |
507 | } | |
508 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
509 | ||
510 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
511 | list_del(&sess->sess_acl_list); | |
c66ac9db | 512 | |
337c0607 NB |
513 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
514 | target_put_session(sess); | |
515 | if (!rc) | |
516 | continue; | |
517 | target_put_session(sess); | |
c66ac9db | 518 | } |
337c0607 NB |
519 | target_put_nacl(acl); |
520 | /* | |
521 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
522 | * for active fabric session transport_deregister_session() callbacks. | |
523 | */ | |
524 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
525 | |
526 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
527 | core_clear_initiator_node_from_tpg(acl, tpg); |
528 | core_free_device_list_for_node(acl, tpg); | |
529 | ||
6708bb27 | 530 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
531 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
532 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
533 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
534 | |
535 | return 0; | |
536 | } | |
537 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
538 | ||
539 | /* core_tpg_set_initiator_node_queue_depth(): | |
540 | * | |
541 | * | |
542 | */ | |
543 | int core_tpg_set_initiator_node_queue_depth( | |
544 | struct se_portal_group *tpg, | |
545 | unsigned char *initiatorname, | |
546 | u32 queue_depth, | |
547 | int force) | |
548 | { | |
549 | struct se_session *sess, *init_sess = NULL; | |
550 | struct se_node_acl *acl; | |
140854cb | 551 | unsigned long flags; |
c66ac9db NB |
552 | int dynamic_acl = 0; |
553 | ||
28638887 | 554 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 555 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
556 | if (!acl) { |
557 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 558 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
559 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
560 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 561 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
562 | return -ENODEV; |
563 | } | |
564 | if (acl->dynamic_node_acl) { | |
565 | acl->dynamic_node_acl = 0; | |
566 | dynamic_acl = 1; | |
567 | } | |
28638887 | 568 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 569 | |
140854cb | 570 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
571 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
572 | if (sess->se_node_acl != acl) | |
573 | continue; | |
574 | ||
575 | if (!force) { | |
6708bb27 | 576 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
577 | " Initiator Node: %s while session is" |
578 | " operational. To forcefully change the queue" | |
579 | " depth and force session reinstatement" | |
580 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 581 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 582 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 583 | |
28638887 | 584 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
585 | if (dynamic_acl) |
586 | acl->dynamic_node_acl = 1; | |
28638887 | 587 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
588 | return -EEXIST; |
589 | } | |
590 | /* | |
591 | * Determine if the session needs to be closed by our context. | |
592 | */ | |
6708bb27 | 593 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
594 | continue; |
595 | ||
596 | init_sess = sess; | |
597 | break; | |
598 | } | |
599 | ||
600 | /* | |
601 | * User has requested to change the queue depth for a Initiator Node. | |
602 | * Change the value in the Node's struct se_node_acl, and call | |
603 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
604 | * | |
e3d6f909 | 605 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
606 | * reinstatement to occur if there is an active session for the |
607 | * $FABRIC_MOD Initiator Node in question. | |
608 | */ | |
609 | acl->queue_depth = queue_depth; | |
610 | ||
611 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 612 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
613 | /* |
614 | * Force session reinstatement if | |
615 | * core_set_queue_depth_for_node() failed, because we assume | |
616 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 617 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
618 | */ |
619 | if (init_sess) | |
e3d6f909 | 620 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 621 | |
28638887 | 622 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
623 | if (dynamic_acl) |
624 | acl->dynamic_node_acl = 1; | |
28638887 | 625 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
626 | return -EINVAL; |
627 | } | |
140854cb | 628 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
629 | /* |
630 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
631 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
632 | */ | |
633 | if (init_sess) | |
e3d6f909 | 634 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 635 | |
bfb9035c | 636 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 637 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
638 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
639 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 640 | |
28638887 | 641 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
642 | if (dynamic_acl) |
643 | acl->dynamic_node_acl = 1; | |
28638887 | 644 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
645 | |
646 | return 0; | |
647 | } | |
648 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
649 | ||
650 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
651 | { | |
652 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 653 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
654 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
655 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
656 | int ret; | |
657 | ||
658 | lun->unpacked_lun = 0; | |
659 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
660 | atomic_set(&lun->lun_acl_count, 0); | |
661 | init_completion(&lun->lun_shutdown_comp); | |
662 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
663 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
664 | spin_lock_init(&lun->lun_acl_lock); | |
665 | spin_lock_init(&lun->lun_cmd_lock); | |
666 | spin_lock_init(&lun->lun_sep_lock); | |
667 | ||
668 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
669 | if (ret < 0) | |
e3d6f909 | 670 | return ret; |
c66ac9db NB |
671 | |
672 | return 0; | |
673 | } | |
674 | ||
675 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
676 | { | |
677 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
678 | ||
679 | core_tpg_post_dellun(se_tpg, lun); | |
680 | } | |
681 | ||
682 | int core_tpg_register( | |
683 | struct target_core_fabric_ops *tfo, | |
684 | struct se_wwn *se_wwn, | |
685 | struct se_portal_group *se_tpg, | |
686 | void *tpg_fabric_ptr, | |
687 | int se_tpg_type) | |
688 | { | |
689 | struct se_lun *lun; | |
690 | u32 i; | |
691 | ||
4a5a75f3 JE |
692 | se_tpg->tpg_lun_list = array_zalloc(TRANSPORT_MAX_LUNS_PER_TPG, |
693 | sizeof(struct se_lun), GFP_KERNEL); | |
6708bb27 AG |
694 | if (!se_tpg->tpg_lun_list) { |
695 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
696 | "tpg_lun_list\n"); |
697 | return -ENOMEM; | |
698 | } | |
699 | ||
700 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
4a5a75f3 | 701 | lun = se_tpg->tpg_lun_list[i]; |
c66ac9db NB |
702 | lun->unpacked_lun = i; |
703 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
704 | atomic_set(&lun->lun_acl_count, 0); | |
705 | init_completion(&lun->lun_shutdown_comp); | |
706 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
707 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
708 | spin_lock_init(&lun->lun_acl_lock); | |
709 | spin_lock_init(&lun->lun_cmd_lock); | |
710 | spin_lock_init(&lun->lun_sep_lock); | |
711 | } | |
712 | ||
713 | se_tpg->se_tpg_type = se_tpg_type; | |
714 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
715 | se_tpg->se_tpg_tfo = tfo; | |
716 | se_tpg->se_tpg_wwn = se_wwn; | |
717 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
718 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 719 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
720 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
721 | spin_lock_init(&se_tpg->acl_node_lock); | |
722 | spin_lock_init(&se_tpg->session_lock); | |
723 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
724 | ||
725 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
726 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
727 | kfree(se_tpg); | |
728 | return -ENOMEM; | |
729 | } | |
730 | } | |
731 | ||
e3d6f909 AG |
732 | spin_lock_bh(&tpg_lock); |
733 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
734 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 735 | |
6708bb27 | 736 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
737 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
738 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
739 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
740 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
741 | ||
742 | return 0; | |
743 | } | |
744 | EXPORT_SYMBOL(core_tpg_register); | |
745 | ||
746 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
747 | { | |
e89d15ee NB |
748 | struct se_node_acl *nacl, *nacl_tmp; |
749 | ||
6708bb27 | 750 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
751 | " for endpoint: %s Portal Tag %u\n", |
752 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
753 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
754 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
755 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 756 | |
e3d6f909 AG |
757 | spin_lock_bh(&tpg_lock); |
758 | list_del(&se_tpg->se_tpg_node); | |
759 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
760 | |
761 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
762 | cpu_relax(); | |
e89d15ee NB |
763 | /* |
764 | * Release any remaining demo-mode generated se_node_acl that have | |
765 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
766 | * in transport_deregister_session(). | |
767 | */ | |
28638887 | 768 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
769 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
770 | acl_list) { | |
771 | list_del(&nacl->acl_list); | |
772 | se_tpg->num_node_acls--; | |
28638887 | 773 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
774 | |
775 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
776 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 777 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 778 | |
28638887 | 779 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 780 | } |
28638887 | 781 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
782 | |
783 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
784 | core_tpg_release_virtual_lun0(se_tpg); | |
785 | ||
786 | se_tpg->se_tpg_fabric_ptr = NULL; | |
4a5a75f3 | 787 | array_free(se_tpg->tpg_lun_list, TRANSPORT_MAX_LUNS_PER_TPG); |
c66ac9db NB |
788 | return 0; |
789 | } | |
790 | EXPORT_SYMBOL(core_tpg_deregister); | |
791 | ||
792 | struct se_lun *core_tpg_pre_addlun( | |
793 | struct se_portal_group *tpg, | |
794 | u32 unpacked_lun) | |
795 | { | |
796 | struct se_lun *lun; | |
797 | ||
798 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 799 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 800 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 801 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 802 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 803 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
804 | return ERR_PTR(-EOVERFLOW); |
805 | } | |
806 | ||
807 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 808 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 809 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 810 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 811 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
812 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
813 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
814 | spin_unlock(&tpg->tpg_lun_lock); |
815 | return ERR_PTR(-EINVAL); | |
816 | } | |
817 | spin_unlock(&tpg->tpg_lun_lock); | |
818 | ||
819 | return lun; | |
820 | } | |
821 | ||
822 | int core_tpg_post_addlun( | |
823 | struct se_portal_group *tpg, | |
824 | struct se_lun *lun, | |
825 | u32 lun_access, | |
826 | void *lun_ptr) | |
827 | { | |
e3d6f909 AG |
828 | int ret; |
829 | ||
830 | ret = core_dev_export(lun_ptr, tpg, lun); | |
831 | if (ret < 0) | |
832 | return ret; | |
c66ac9db NB |
833 | |
834 | spin_lock(&tpg->tpg_lun_lock); | |
835 | lun->lun_access = lun_access; | |
836 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
837 | spin_unlock(&tpg->tpg_lun_lock); | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | static void core_tpg_shutdown_lun( | |
843 | struct se_portal_group *tpg, | |
844 | struct se_lun *lun) | |
845 | { | |
846 | core_clear_lun_from_tpg(lun, tpg); | |
847 | transport_clear_lun_from_sessions(lun); | |
848 | } | |
849 | ||
850 | struct se_lun *core_tpg_pre_dellun( | |
851 | struct se_portal_group *tpg, | |
8d9efe53 | 852 | u32 unpacked_lun) |
c66ac9db NB |
853 | { |
854 | struct se_lun *lun; | |
855 | ||
856 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 857 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 858 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 859 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 860 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 861 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
862 | return ERR_PTR(-EOVERFLOW); |
863 | } | |
864 | ||
865 | spin_lock(&tpg->tpg_lun_lock); | |
4a5a75f3 | 866 | lun = tpg->tpg_lun_list[unpacked_lun]; |
c66ac9db | 867 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
6708bb27 | 868 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 869 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
870 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
871 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
872 | spin_unlock(&tpg->tpg_lun_lock); |
873 | return ERR_PTR(-ENODEV); | |
874 | } | |
875 | spin_unlock(&tpg->tpg_lun_lock); | |
876 | ||
877 | return lun; | |
878 | } | |
879 | ||
880 | int core_tpg_post_dellun( | |
881 | struct se_portal_group *tpg, | |
882 | struct se_lun *lun) | |
883 | { | |
884 | core_tpg_shutdown_lun(tpg, lun); | |
885 | ||
886 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
887 | ||
888 | spin_lock(&tpg->tpg_lun_lock); | |
889 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
890 | spin_unlock(&tpg->tpg_lun_lock); | |
891 | ||
892 | return 0; | |
893 | } |