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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++) { | |
166 | lun = &tpg->tpg_lun_list[i]; | |
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 | ||
225 | /* core_create_device_list_for_node(): | |
226 | * | |
227 | * | |
228 | */ | |
229 | static int core_create_device_list_for_node(struct se_node_acl *nacl) | |
230 | { | |
231 | struct se_dev_entry *deve; | |
232 | int i; | |
233 | ||
234 | nacl->device_list = kzalloc(sizeof(struct se_dev_entry) * | |
235 | TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL); | |
6708bb27 AG |
236 | if (!nacl->device_list) { |
237 | pr_err("Unable to allocate memory for" | |
c66ac9db | 238 | " struct se_node_acl->device_list\n"); |
e3d6f909 | 239 | return -ENOMEM; |
c66ac9db NB |
240 | } |
241 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
242 | deve = &nacl->device_list[i]; | |
243 | ||
244 | atomic_set(&deve->ua_count, 0); | |
245 | atomic_set(&deve->pr_ref_count, 0); | |
246 | spin_lock_init(&deve->ua_lock); | |
247 | INIT_LIST_HEAD(&deve->alua_port_list); | |
248 | INIT_LIST_HEAD(&deve->ua_list); | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | /* core_tpg_check_initiator_node_acl() | |
255 | * | |
256 | * | |
257 | */ | |
258 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
259 | struct se_portal_group *tpg, | |
260 | unsigned char *initiatorname) | |
261 | { | |
262 | struct se_node_acl *acl; | |
263 | ||
264 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 265 | if (acl) |
c66ac9db NB |
266 | return acl; |
267 | ||
6708bb27 | 268 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
269 | return NULL; |
270 | ||
e3d6f909 | 271 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
6708bb27 | 272 | if (!acl) |
c66ac9db NB |
273 | return NULL; |
274 | ||
275 | INIT_LIST_HEAD(&acl->acl_list); | |
276 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
277 | spin_lock_init(&acl->device_list_lock); | |
278 | spin_lock_init(&acl->nacl_sess_lock); | |
279 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 280 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
281 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
282 | acl->se_tpg = tpg; | |
283 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
284 | spin_lock_init(&acl->stats_lock); | |
285 | acl->dynamic_node_acl = 1; | |
286 | ||
e3d6f909 | 287 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
288 | |
289 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 290 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
291 | return NULL; |
292 | } | |
293 | ||
294 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
295 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 296 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
297 | return NULL; |
298 | } | |
052605c6 NB |
299 | /* |
300 | * Here we only create demo-mode MappedLUNs from the active | |
301 | * TPG LUNs if the fabric is not explictly asking for | |
302 | * tpg_check_demo_mode_login_only() == 1. | |
303 | */ | |
304 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && | |
305 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) | |
306 | do { ; } while (0); | |
307 | else | |
308 | core_tpg_add_node_to_devs(acl, tpg); | |
c66ac9db | 309 | |
28638887 | 310 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
311 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
312 | tpg->num_node_acls++; | |
28638887 | 313 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 314 | |
6708bb27 | 315 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
316 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
317 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
318 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
319 | |
320 | return acl; | |
321 | } | |
322 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
323 | ||
324 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
325 | { | |
326 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
327 | cpu_relax(); | |
328 | } | |
329 | ||
c66ac9db NB |
330 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
331 | { | |
332 | int i, ret; | |
333 | struct se_lun *lun; | |
334 | ||
335 | spin_lock(&tpg->tpg_lun_lock); | |
336 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
337 | lun = &tpg->tpg_lun_list[i]; | |
338 | ||
339 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
340 | (lun->lun_se_dev == NULL)) | |
341 | continue; | |
342 | ||
343 | spin_unlock(&tpg->tpg_lun_lock); | |
344 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); | |
345 | spin_lock(&tpg->tpg_lun_lock); | |
346 | } | |
347 | spin_unlock(&tpg->tpg_lun_lock); | |
348 | } | |
349 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
350 | ||
351 | /* core_tpg_add_initiator_node_acl(): | |
352 | * | |
353 | * | |
354 | */ | |
355 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
356 | struct se_portal_group *tpg, | |
357 | struct se_node_acl *se_nacl, | |
358 | const char *initiatorname, | |
359 | u32 queue_depth) | |
360 | { | |
361 | struct se_node_acl *acl = NULL; | |
362 | ||
28638887 | 363 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 364 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 365 | if (acl) { |
c66ac9db NB |
366 | if (acl->dynamic_node_acl) { |
367 | acl->dynamic_node_acl = 0; | |
6708bb27 | 368 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
369 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
370 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 371 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
372 | /* |
373 | * Release the locally allocated struct se_node_acl | |
374 | * because * core_tpg_add_initiator_node_acl() returned | |
375 | * a pointer to an existing demo mode node ACL. | |
376 | */ | |
377 | if (se_nacl) | |
e3d6f909 | 378 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
379 | se_nacl); |
380 | goto done; | |
381 | } | |
382 | ||
6708bb27 | 383 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 384 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
385 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
386 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 387 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
388 | return ERR_PTR(-EEXIST); |
389 | } | |
28638887 | 390 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 391 | |
6708bb27 AG |
392 | if (!se_nacl) { |
393 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
394 | return ERR_PTR(-EINVAL); |
395 | } | |
396 | /* | |
397 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
398 | * dependent structure allocated via | |
399 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
400 | */ | |
401 | acl = se_nacl; | |
402 | ||
403 | INIT_LIST_HEAD(&acl->acl_list); | |
404 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
405 | spin_lock_init(&acl->device_list_lock); | |
406 | spin_lock_init(&acl->nacl_sess_lock); | |
407 | atomic_set(&acl->acl_pr_ref_count, 0); | |
408 | acl->queue_depth = queue_depth; | |
409 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
410 | acl->se_tpg = tpg; | |
411 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
412 | spin_lock_init(&acl->stats_lock); | |
413 | ||
e3d6f909 | 414 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
415 | |
416 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 417 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
418 | return ERR_PTR(-ENOMEM); |
419 | } | |
420 | ||
421 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
422 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 423 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
424 | return ERR_PTR(-EINVAL); |
425 | } | |
426 | ||
28638887 | 427 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
428 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
429 | tpg->num_node_acls++; | |
28638887 | 430 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
431 | |
432 | done: | |
6708bb27 | 433 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
434 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
435 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
436 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
437 | |
438 | return acl; | |
439 | } | |
440 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
441 | ||
442 | /* core_tpg_del_initiator_node_acl(): | |
443 | * | |
444 | * | |
445 | */ | |
446 | int core_tpg_del_initiator_node_acl( | |
447 | struct se_portal_group *tpg, | |
448 | struct se_node_acl *acl, | |
449 | int force) | |
450 | { | |
451 | struct se_session *sess, *sess_tmp; | |
452 | int dynamic_acl = 0; | |
453 | ||
28638887 | 454 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
455 | if (acl->dynamic_node_acl) { |
456 | acl->dynamic_node_acl = 0; | |
457 | dynamic_acl = 1; | |
458 | } | |
459 | list_del(&acl->acl_list); | |
460 | tpg->num_node_acls--; | |
28638887 | 461 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
462 | |
463 | spin_lock_bh(&tpg->session_lock); | |
464 | list_for_each_entry_safe(sess, sess_tmp, | |
465 | &tpg->tpg_sess_list, sess_list) { | |
466 | if (sess->se_node_acl != acl) | |
467 | continue; | |
468 | /* | |
469 | * Determine if the session needs to be closed by our context. | |
470 | */ | |
6708bb27 | 471 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
472 | continue; |
473 | ||
474 | spin_unlock_bh(&tpg->session_lock); | |
475 | /* | |
476 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
477 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
478 | */ | |
e3d6f909 | 479 | tpg->se_tpg_tfo->close_session(sess); |
c66ac9db NB |
480 | |
481 | spin_lock_bh(&tpg->session_lock); | |
482 | } | |
483 | spin_unlock_bh(&tpg->session_lock); | |
484 | ||
485 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
486 | core_clear_initiator_node_from_tpg(acl, tpg); |
487 | core_free_device_list_for_node(acl, tpg); | |
488 | ||
6708bb27 | 489 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
490 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
491 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
492 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
493 | |
494 | return 0; | |
495 | } | |
496 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
497 | ||
498 | /* core_tpg_set_initiator_node_queue_depth(): | |
499 | * | |
500 | * | |
501 | */ | |
502 | int core_tpg_set_initiator_node_queue_depth( | |
503 | struct se_portal_group *tpg, | |
504 | unsigned char *initiatorname, | |
505 | u32 queue_depth, | |
506 | int force) | |
507 | { | |
508 | struct se_session *sess, *init_sess = NULL; | |
509 | struct se_node_acl *acl; | |
510 | int dynamic_acl = 0; | |
511 | ||
28638887 | 512 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 513 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
514 | if (!acl) { |
515 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 516 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
517 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
518 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 519 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
520 | return -ENODEV; |
521 | } | |
522 | if (acl->dynamic_node_acl) { | |
523 | acl->dynamic_node_acl = 0; | |
524 | dynamic_acl = 1; | |
525 | } | |
28638887 | 526 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
527 | |
528 | spin_lock_bh(&tpg->session_lock); | |
529 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { | |
530 | if (sess->se_node_acl != acl) | |
531 | continue; | |
532 | ||
533 | if (!force) { | |
6708bb27 | 534 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
535 | " Initiator Node: %s while session is" |
536 | " operational. To forcefully change the queue" | |
537 | " depth and force session reinstatement" | |
538 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 539 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
c66ac9db NB |
540 | spin_unlock_bh(&tpg->session_lock); |
541 | ||
28638887 | 542 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
543 | if (dynamic_acl) |
544 | acl->dynamic_node_acl = 1; | |
28638887 | 545 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
546 | return -EEXIST; |
547 | } | |
548 | /* | |
549 | * Determine if the session needs to be closed by our context. | |
550 | */ | |
6708bb27 | 551 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
552 | continue; |
553 | ||
554 | init_sess = sess; | |
555 | break; | |
556 | } | |
557 | ||
558 | /* | |
559 | * User has requested to change the queue depth for a Initiator Node. | |
560 | * Change the value in the Node's struct se_node_acl, and call | |
561 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
562 | * | |
e3d6f909 | 563 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
564 | * reinstatement to occur if there is an active session for the |
565 | * $FABRIC_MOD Initiator Node in question. | |
566 | */ | |
567 | acl->queue_depth = queue_depth; | |
568 | ||
569 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
570 | spin_unlock_bh(&tpg->session_lock); | |
571 | /* | |
572 | * Force session reinstatement if | |
573 | * core_set_queue_depth_for_node() failed, because we assume | |
574 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 575 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
576 | */ |
577 | if (init_sess) | |
e3d6f909 | 578 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 579 | |
28638887 | 580 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
581 | if (dynamic_acl) |
582 | acl->dynamic_node_acl = 1; | |
28638887 | 583 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
584 | return -EINVAL; |
585 | } | |
586 | spin_unlock_bh(&tpg->session_lock); | |
587 | /* | |
588 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
589 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
590 | */ | |
591 | if (init_sess) | |
e3d6f909 | 592 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 593 | |
bfb9035c | 594 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 595 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
596 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
597 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 598 | |
28638887 | 599 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
600 | if (dynamic_acl) |
601 | acl->dynamic_node_acl = 1; | |
28638887 | 602 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
603 | |
604 | return 0; | |
605 | } | |
606 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
607 | ||
608 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
609 | { | |
610 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 611 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
612 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
613 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
614 | int ret; | |
615 | ||
616 | lun->unpacked_lun = 0; | |
617 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
618 | atomic_set(&lun->lun_acl_count, 0); | |
619 | init_completion(&lun->lun_shutdown_comp); | |
620 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
621 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
622 | spin_lock_init(&lun->lun_acl_lock); | |
623 | spin_lock_init(&lun->lun_cmd_lock); | |
624 | spin_lock_init(&lun->lun_sep_lock); | |
625 | ||
626 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
627 | if (ret < 0) | |
e3d6f909 | 628 | return ret; |
c66ac9db NB |
629 | |
630 | return 0; | |
631 | } | |
632 | ||
633 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
634 | { | |
635 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
636 | ||
637 | core_tpg_post_dellun(se_tpg, lun); | |
638 | } | |
639 | ||
640 | int core_tpg_register( | |
641 | struct target_core_fabric_ops *tfo, | |
642 | struct se_wwn *se_wwn, | |
643 | struct se_portal_group *se_tpg, | |
644 | void *tpg_fabric_ptr, | |
645 | int se_tpg_type) | |
646 | { | |
647 | struct se_lun *lun; | |
648 | u32 i; | |
649 | ||
650 | se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) * | |
651 | TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL); | |
6708bb27 AG |
652 | if (!se_tpg->tpg_lun_list) { |
653 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
654 | "tpg_lun_list\n"); |
655 | return -ENOMEM; | |
656 | } | |
657 | ||
658 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
659 | lun = &se_tpg->tpg_lun_list[i]; | |
660 | lun->unpacked_lun = i; | |
661 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
662 | atomic_set(&lun->lun_acl_count, 0); | |
663 | init_completion(&lun->lun_shutdown_comp); | |
664 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
665 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
666 | spin_lock_init(&lun->lun_acl_lock); | |
667 | spin_lock_init(&lun->lun_cmd_lock); | |
668 | spin_lock_init(&lun->lun_sep_lock); | |
669 | } | |
670 | ||
671 | se_tpg->se_tpg_type = se_tpg_type; | |
672 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
673 | se_tpg->se_tpg_tfo = tfo; | |
674 | se_tpg->se_tpg_wwn = se_wwn; | |
675 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
676 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 677 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
678 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
679 | spin_lock_init(&se_tpg->acl_node_lock); | |
680 | spin_lock_init(&se_tpg->session_lock); | |
681 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
682 | ||
683 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
684 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
685 | kfree(se_tpg); | |
686 | return -ENOMEM; | |
687 | } | |
688 | } | |
689 | ||
e3d6f909 AG |
690 | spin_lock_bh(&tpg_lock); |
691 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
692 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 693 | |
6708bb27 | 694 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
695 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
696 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
697 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
698 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | EXPORT_SYMBOL(core_tpg_register); | |
703 | ||
704 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
705 | { | |
e89d15ee NB |
706 | struct se_node_acl *nacl, *nacl_tmp; |
707 | ||
6708bb27 | 708 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
709 | " for endpoint: %s Portal Tag %u\n", |
710 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
711 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
712 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
713 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 714 | |
e3d6f909 AG |
715 | spin_lock_bh(&tpg_lock); |
716 | list_del(&se_tpg->se_tpg_node); | |
717 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
718 | |
719 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
720 | cpu_relax(); | |
e89d15ee NB |
721 | /* |
722 | * Release any remaining demo-mode generated se_node_acl that have | |
723 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
724 | * in transport_deregister_session(). | |
725 | */ | |
28638887 | 726 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
727 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
728 | acl_list) { | |
729 | list_del(&nacl->acl_list); | |
730 | se_tpg->num_node_acls--; | |
28638887 | 731 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
732 | |
733 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
734 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 735 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 736 | |
28638887 | 737 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 738 | } |
28638887 | 739 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
740 | |
741 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
742 | core_tpg_release_virtual_lun0(se_tpg); | |
743 | ||
744 | se_tpg->se_tpg_fabric_ptr = NULL; | |
745 | kfree(se_tpg->tpg_lun_list); | |
746 | return 0; | |
747 | } | |
748 | EXPORT_SYMBOL(core_tpg_deregister); | |
749 | ||
750 | struct se_lun *core_tpg_pre_addlun( | |
751 | struct se_portal_group *tpg, | |
752 | u32 unpacked_lun) | |
753 | { | |
754 | struct se_lun *lun; | |
755 | ||
756 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 757 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 758 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 759 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 760 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 761 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
762 | return ERR_PTR(-EOVERFLOW); |
763 | } | |
764 | ||
765 | spin_lock(&tpg->tpg_lun_lock); | |
766 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
767 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 768 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 769 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
770 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
771 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
772 | spin_unlock(&tpg->tpg_lun_lock); |
773 | return ERR_PTR(-EINVAL); | |
774 | } | |
775 | spin_unlock(&tpg->tpg_lun_lock); | |
776 | ||
777 | return lun; | |
778 | } | |
779 | ||
780 | int core_tpg_post_addlun( | |
781 | struct se_portal_group *tpg, | |
782 | struct se_lun *lun, | |
783 | u32 lun_access, | |
784 | void *lun_ptr) | |
785 | { | |
e3d6f909 AG |
786 | int ret; |
787 | ||
788 | ret = core_dev_export(lun_ptr, tpg, lun); | |
789 | if (ret < 0) | |
790 | return ret; | |
c66ac9db NB |
791 | |
792 | spin_lock(&tpg->tpg_lun_lock); | |
793 | lun->lun_access = lun_access; | |
794 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
795 | spin_unlock(&tpg->tpg_lun_lock); | |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
800 | static void core_tpg_shutdown_lun( | |
801 | struct se_portal_group *tpg, | |
802 | struct se_lun *lun) | |
803 | { | |
804 | core_clear_lun_from_tpg(lun, tpg); | |
805 | transport_clear_lun_from_sessions(lun); | |
806 | } | |
807 | ||
808 | struct se_lun *core_tpg_pre_dellun( | |
809 | struct se_portal_group *tpg, | |
8d9efe53 | 810 | u32 unpacked_lun) |
c66ac9db NB |
811 | { |
812 | struct se_lun *lun; | |
813 | ||
814 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 815 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 816 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 817 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 818 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 819 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
820 | return ERR_PTR(-EOVERFLOW); |
821 | } | |
822 | ||
823 | spin_lock(&tpg->tpg_lun_lock); | |
824 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
825 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 826 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 827 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
828 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
829 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
830 | spin_unlock(&tpg->tpg_lun_lock); |
831 | return ERR_PTR(-ENODEV); | |
832 | } | |
833 | spin_unlock(&tpg->tpg_lun_lock); | |
834 | ||
835 | return lun; | |
836 | } | |
837 | ||
838 | int core_tpg_post_dellun( | |
839 | struct se_portal_group *tpg, | |
840 | struct se_lun *lun) | |
841 | { | |
842 | core_tpg_shutdown_lun(tpg, lun); | |
843 | ||
844 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
845 | ||
846 | spin_lock(&tpg->tpg_lun_lock); | |
847 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
848 | spin_unlock(&tpg->tpg_lun_lock); | |
849 | ||
850 | return 0; | |
851 | } |