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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); | |
afb999ff | 277 | kref_init(&acl->acl_kref); |
01468346 | 278 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
279 | spin_lock_init(&acl->device_list_lock); |
280 | spin_lock_init(&acl->nacl_sess_lock); | |
281 | atomic_set(&acl->acl_pr_ref_count, 0); | |
e3d6f909 | 282 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
c66ac9db NB |
283 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
284 | acl->se_tpg = tpg; | |
285 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
286 | spin_lock_init(&acl->stats_lock); | |
287 | acl->dynamic_node_acl = 1; | |
288 | ||
e3d6f909 | 289 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
290 | |
291 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 292 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
293 | return NULL; |
294 | } | |
295 | ||
296 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
297 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 298 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
299 | return NULL; |
300 | } | |
052605c6 NB |
301 | /* |
302 | * Here we only create demo-mode MappedLUNs from the active | |
303 | * TPG LUNs if the fabric is not explictly asking for | |
304 | * tpg_check_demo_mode_login_only() == 1. | |
305 | */ | |
306 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && | |
307 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) | |
308 | do { ; } while (0); | |
309 | else | |
310 | core_tpg_add_node_to_devs(acl, tpg); | |
c66ac9db | 311 | |
28638887 | 312 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
313 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
314 | tpg->num_node_acls++; | |
28638887 | 315 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 316 | |
6708bb27 | 317 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
318 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
319 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
320 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
321 | |
322 | return acl; | |
323 | } | |
324 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
325 | ||
326 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
327 | { | |
328 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
329 | cpu_relax(); | |
330 | } | |
331 | ||
c66ac9db NB |
332 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
333 | { | |
334 | int i, ret; | |
335 | struct se_lun *lun; | |
336 | ||
337 | spin_lock(&tpg->tpg_lun_lock); | |
338 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
339 | lun = &tpg->tpg_lun_list[i]; | |
340 | ||
341 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || | |
342 | (lun->lun_se_dev == NULL)) | |
343 | continue; | |
344 | ||
345 | spin_unlock(&tpg->tpg_lun_lock); | |
346 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); | |
347 | spin_lock(&tpg->tpg_lun_lock); | |
348 | } | |
349 | spin_unlock(&tpg->tpg_lun_lock); | |
350 | } | |
351 | EXPORT_SYMBOL(core_tpg_clear_object_luns); | |
352 | ||
353 | /* core_tpg_add_initiator_node_acl(): | |
354 | * | |
355 | * | |
356 | */ | |
357 | struct se_node_acl *core_tpg_add_initiator_node_acl( | |
358 | struct se_portal_group *tpg, | |
359 | struct se_node_acl *se_nacl, | |
360 | const char *initiatorname, | |
361 | u32 queue_depth) | |
362 | { | |
363 | struct se_node_acl *acl = NULL; | |
364 | ||
28638887 | 365 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 366 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 367 | if (acl) { |
c66ac9db NB |
368 | if (acl->dynamic_node_acl) { |
369 | acl->dynamic_node_acl = 0; | |
6708bb27 | 370 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
371 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
372 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
28638887 | 373 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
374 | /* |
375 | * Release the locally allocated struct se_node_acl | |
376 | * because * core_tpg_add_initiator_node_acl() returned | |
377 | * a pointer to an existing demo mode node ACL. | |
378 | */ | |
379 | if (se_nacl) | |
e3d6f909 | 380 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
c66ac9db NB |
381 | se_nacl); |
382 | goto done; | |
383 | } | |
384 | ||
6708bb27 | 385 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 386 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
387 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
388 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 389 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
390 | return ERR_PTR(-EEXIST); |
391 | } | |
28638887 | 392 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 393 | |
6708bb27 AG |
394 | if (!se_nacl) { |
395 | pr_err("struct se_node_acl pointer is NULL\n"); | |
c66ac9db NB |
396 | return ERR_PTR(-EINVAL); |
397 | } | |
398 | /* | |
399 | * For v4.x logic the se_node_acl_s is hanging off a fabric | |
400 | * dependent structure allocated via | |
401 | * struct target_core_fabric_ops->fabric_make_nodeacl() | |
402 | */ | |
403 | acl = se_nacl; | |
404 | ||
405 | INIT_LIST_HEAD(&acl->acl_list); | |
406 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
afb999ff | 407 | kref_init(&acl->acl_kref); |
01468346 | 408 | init_completion(&acl->acl_free_comp); |
c66ac9db NB |
409 | spin_lock_init(&acl->device_list_lock); |
410 | spin_lock_init(&acl->nacl_sess_lock); | |
411 | atomic_set(&acl->acl_pr_ref_count, 0); | |
412 | acl->queue_depth = queue_depth; | |
413 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
414 | acl->se_tpg = tpg; | |
415 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
416 | spin_lock_init(&acl->stats_lock); | |
417 | ||
e3d6f909 | 418 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db NB |
419 | |
420 | if (core_create_device_list_for_node(acl) < 0) { | |
e3d6f909 | 421 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
422 | return ERR_PTR(-ENOMEM); |
423 | } | |
424 | ||
425 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
426 | core_free_device_list_for_node(acl, tpg); | |
e3d6f909 | 427 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
c66ac9db NB |
428 | return ERR_PTR(-EINVAL); |
429 | } | |
430 | ||
28638887 | 431 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
432 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
433 | tpg->num_node_acls++; | |
28638887 | 434 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
435 | |
436 | done: | |
6708bb27 | 437 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
438 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
439 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
440 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); | |
c66ac9db NB |
441 | |
442 | return acl; | |
443 | } | |
444 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); | |
445 | ||
446 | /* core_tpg_del_initiator_node_acl(): | |
447 | * | |
448 | * | |
449 | */ | |
450 | int core_tpg_del_initiator_node_acl( | |
451 | struct se_portal_group *tpg, | |
452 | struct se_node_acl *acl, | |
453 | int force) | |
454 | { | |
455 | struct se_session *sess, *sess_tmp; | |
140854cb | 456 | unsigned long flags; |
c66ac9db NB |
457 | int dynamic_acl = 0; |
458 | ||
28638887 | 459 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
460 | if (acl->dynamic_node_acl) { |
461 | acl->dynamic_node_acl = 0; | |
462 | dynamic_acl = 1; | |
463 | } | |
464 | list_del(&acl->acl_list); | |
465 | tpg->num_node_acls--; | |
28638887 | 466 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 467 | |
140854cb | 468 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
469 | list_for_each_entry_safe(sess, sess_tmp, |
470 | &tpg->tpg_sess_list, sess_list) { | |
471 | if (sess->se_node_acl != acl) | |
472 | continue; | |
473 | /* | |
474 | * Determine if the session needs to be closed by our context. | |
475 | */ | |
6708bb27 | 476 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
477 | continue; |
478 | ||
140854cb | 479 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
480 | /* |
481 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
482 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
483 | */ | |
e3d6f909 | 484 | tpg->se_tpg_tfo->close_session(sess); |
c66ac9db | 485 | |
140854cb | 486 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db | 487 | } |
140854cb | 488 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
489 | |
490 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
491 | core_clear_initiator_node_from_tpg(acl, tpg); |
492 | core_free_device_list_for_node(acl, tpg); | |
493 | ||
6708bb27 | 494 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
495 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
496 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
497 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db NB |
498 | |
499 | return 0; | |
500 | } | |
501 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); | |
502 | ||
503 | /* core_tpg_set_initiator_node_queue_depth(): | |
504 | * | |
505 | * | |
506 | */ | |
507 | int core_tpg_set_initiator_node_queue_depth( | |
508 | struct se_portal_group *tpg, | |
509 | unsigned char *initiatorname, | |
510 | u32 queue_depth, | |
511 | int force) | |
512 | { | |
513 | struct se_session *sess, *init_sess = NULL; | |
514 | struct se_node_acl *acl; | |
140854cb | 515 | unsigned long flags; |
c66ac9db NB |
516 | int dynamic_acl = 0; |
517 | ||
28638887 | 518 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db | 519 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
520 | if (!acl) { |
521 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 522 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
523 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
524 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
28638887 | 525 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
526 | return -ENODEV; |
527 | } | |
528 | if (acl->dynamic_node_acl) { | |
529 | acl->dynamic_node_acl = 0; | |
530 | dynamic_acl = 1; | |
531 | } | |
28638887 | 532 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db | 533 | |
140854cb | 534 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
535 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
536 | if (sess->se_node_acl != acl) | |
537 | continue; | |
538 | ||
539 | if (!force) { | |
6708bb27 | 540 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
541 | " Initiator Node: %s while session is" |
542 | " operational. To forcefully change the queue" | |
543 | " depth and force session reinstatement" | |
544 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 545 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 546 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 547 | |
28638887 | 548 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
549 | if (dynamic_acl) |
550 | acl->dynamic_node_acl = 1; | |
28638887 | 551 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
552 | return -EEXIST; |
553 | } | |
554 | /* | |
555 | * Determine if the session needs to be closed by our context. | |
556 | */ | |
6708bb27 | 557 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
558 | continue; |
559 | ||
560 | init_sess = sess; | |
561 | break; | |
562 | } | |
563 | ||
564 | /* | |
565 | * User has requested to change the queue depth for a Initiator Node. | |
566 | * Change the value in the Node's struct se_node_acl, and call | |
567 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
568 | * | |
e3d6f909 | 569 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
570 | * reinstatement to occur if there is an active session for the |
571 | * $FABRIC_MOD Initiator Node in question. | |
572 | */ | |
573 | acl->queue_depth = queue_depth; | |
574 | ||
575 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 576 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
577 | /* |
578 | * Force session reinstatement if | |
579 | * core_set_queue_depth_for_node() failed, because we assume | |
580 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 581 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
582 | */ |
583 | if (init_sess) | |
e3d6f909 | 584 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 585 | |
28638887 | 586 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
587 | if (dynamic_acl) |
588 | acl->dynamic_node_acl = 1; | |
28638887 | 589 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
590 | return -EINVAL; |
591 | } | |
140854cb | 592 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
593 | /* |
594 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
595 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
596 | */ | |
597 | if (init_sess) | |
e3d6f909 | 598 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 599 | |
bfb9035c | 600 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 601 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
602 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
603 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 604 | |
28638887 | 605 | spin_lock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
606 | if (dynamic_acl) |
607 | acl->dynamic_node_acl = 1; | |
28638887 | 608 | spin_unlock_irq(&tpg->acl_node_lock); |
c66ac9db NB |
609 | |
610 | return 0; | |
611 | } | |
612 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
613 | ||
614 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) | |
615 | { | |
616 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 617 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
618 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
619 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
620 | int ret; | |
621 | ||
622 | lun->unpacked_lun = 0; | |
623 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
624 | atomic_set(&lun->lun_acl_count, 0); | |
625 | init_completion(&lun->lun_shutdown_comp); | |
626 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
627 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
628 | spin_lock_init(&lun->lun_acl_lock); | |
629 | spin_lock_init(&lun->lun_cmd_lock); | |
630 | spin_lock_init(&lun->lun_sep_lock); | |
631 | ||
632 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); | |
633 | if (ret < 0) | |
e3d6f909 | 634 | return ret; |
c66ac9db NB |
635 | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) | |
640 | { | |
641 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; | |
642 | ||
643 | core_tpg_post_dellun(se_tpg, lun); | |
644 | } | |
645 | ||
646 | int core_tpg_register( | |
647 | struct target_core_fabric_ops *tfo, | |
648 | struct se_wwn *se_wwn, | |
649 | struct se_portal_group *se_tpg, | |
650 | void *tpg_fabric_ptr, | |
651 | int se_tpg_type) | |
652 | { | |
653 | struct se_lun *lun; | |
654 | u32 i; | |
655 | ||
656 | se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) * | |
657 | TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL); | |
6708bb27 AG |
658 | if (!se_tpg->tpg_lun_list) { |
659 | pr_err("Unable to allocate struct se_portal_group->" | |
c66ac9db NB |
660 | "tpg_lun_list\n"); |
661 | return -ENOMEM; | |
662 | } | |
663 | ||
664 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
665 | lun = &se_tpg->tpg_lun_list[i]; | |
666 | lun->unpacked_lun = i; | |
667 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
668 | atomic_set(&lun->lun_acl_count, 0); | |
669 | init_completion(&lun->lun_shutdown_comp); | |
670 | INIT_LIST_HEAD(&lun->lun_acl_list); | |
671 | INIT_LIST_HEAD(&lun->lun_cmd_list); | |
672 | spin_lock_init(&lun->lun_acl_lock); | |
673 | spin_lock_init(&lun->lun_cmd_lock); | |
674 | spin_lock_init(&lun->lun_sep_lock); | |
675 | } | |
676 | ||
677 | se_tpg->se_tpg_type = se_tpg_type; | |
678 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; | |
679 | se_tpg->se_tpg_tfo = tfo; | |
680 | se_tpg->se_tpg_wwn = se_wwn; | |
681 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
682 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 683 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db NB |
684 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
685 | spin_lock_init(&se_tpg->acl_node_lock); | |
686 | spin_lock_init(&se_tpg->session_lock); | |
687 | spin_lock_init(&se_tpg->tpg_lun_lock); | |
688 | ||
689 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { | |
690 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { | |
691 | kfree(se_tpg); | |
692 | return -ENOMEM; | |
693 | } | |
694 | } | |
695 | ||
e3d6f909 AG |
696 | spin_lock_bh(&tpg_lock); |
697 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
698 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 699 | |
6708bb27 | 700 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
c66ac9db NB |
701 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
702 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
703 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? | |
704 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); | |
705 | ||
706 | return 0; | |
707 | } | |
708 | EXPORT_SYMBOL(core_tpg_register); | |
709 | ||
710 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
711 | { | |
e89d15ee NB |
712 | struct se_node_acl *nacl, *nacl_tmp; |
713 | ||
6708bb27 | 714 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
c66ac9db NB |
715 | " for endpoint: %s Portal Tag %u\n", |
716 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? | |
e3d6f909 AG |
717 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
718 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), | |
719 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 720 | |
e3d6f909 AG |
721 | spin_lock_bh(&tpg_lock); |
722 | list_del(&se_tpg->se_tpg_node); | |
723 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
724 | |
725 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
726 | cpu_relax(); | |
e89d15ee NB |
727 | /* |
728 | * Release any remaining demo-mode generated se_node_acl that have | |
729 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
730 | * in transport_deregister_session(). | |
731 | */ | |
28638887 | 732 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
733 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
734 | acl_list) { | |
735 | list_del(&nacl->acl_list); | |
736 | se_tpg->num_node_acls--; | |
28638887 | 737 | spin_unlock_irq(&se_tpg->acl_node_lock); |
e89d15ee NB |
738 | |
739 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
740 | core_free_device_list_for_node(nacl, se_tpg); | |
e3d6f909 | 741 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
e89d15ee | 742 | |
28638887 | 743 | spin_lock_irq(&se_tpg->acl_node_lock); |
e89d15ee | 744 | } |
28638887 | 745 | spin_unlock_irq(&se_tpg->acl_node_lock); |
c66ac9db NB |
746 | |
747 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) | |
748 | core_tpg_release_virtual_lun0(se_tpg); | |
749 | ||
750 | se_tpg->se_tpg_fabric_ptr = NULL; | |
751 | kfree(se_tpg->tpg_lun_list); | |
752 | return 0; | |
753 | } | |
754 | EXPORT_SYMBOL(core_tpg_deregister); | |
755 | ||
756 | struct se_lun *core_tpg_pre_addlun( | |
757 | struct se_portal_group *tpg, | |
758 | u32 unpacked_lun) | |
759 | { | |
760 | struct se_lun *lun; | |
761 | ||
762 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 763 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 764 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 765 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 766 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 767 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
768 | return ERR_PTR(-EOVERFLOW); |
769 | } | |
770 | ||
771 | spin_lock(&tpg->tpg_lun_lock); | |
772 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
773 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 774 | pr_err("TPG Logical Unit Number: %u is already active" |
c66ac9db | 775 | " on %s Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
776 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
777 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
778 | spin_unlock(&tpg->tpg_lun_lock); |
779 | return ERR_PTR(-EINVAL); | |
780 | } | |
781 | spin_unlock(&tpg->tpg_lun_lock); | |
782 | ||
783 | return lun; | |
784 | } | |
785 | ||
786 | int core_tpg_post_addlun( | |
787 | struct se_portal_group *tpg, | |
788 | struct se_lun *lun, | |
789 | u32 lun_access, | |
790 | void *lun_ptr) | |
791 | { | |
e3d6f909 AG |
792 | int ret; |
793 | ||
794 | ret = core_dev_export(lun_ptr, tpg, lun); | |
795 | if (ret < 0) | |
796 | return ret; | |
c66ac9db NB |
797 | |
798 | spin_lock(&tpg->tpg_lun_lock); | |
799 | lun->lun_access = lun_access; | |
800 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; | |
801 | spin_unlock(&tpg->tpg_lun_lock); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static void core_tpg_shutdown_lun( | |
807 | struct se_portal_group *tpg, | |
808 | struct se_lun *lun) | |
809 | { | |
810 | core_clear_lun_from_tpg(lun, tpg); | |
811 | transport_clear_lun_from_sessions(lun); | |
812 | } | |
813 | ||
814 | struct se_lun *core_tpg_pre_dellun( | |
815 | struct se_portal_group *tpg, | |
8d9efe53 | 816 | u32 unpacked_lun) |
c66ac9db NB |
817 | { |
818 | struct se_lun *lun; | |
819 | ||
820 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 821 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 822 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 823 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
c66ac9db | 824 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 825 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
826 | return ERR_PTR(-EOVERFLOW); |
827 | } | |
828 | ||
829 | spin_lock(&tpg->tpg_lun_lock); | |
830 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
831 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { | |
6708bb27 | 832 | pr_err("%s Logical Unit Number: %u is not active on" |
c66ac9db | 833 | " Target Portal Group: %u, ignoring request.\n", |
e3d6f909 AG |
834 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
835 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db NB |
836 | spin_unlock(&tpg->tpg_lun_lock); |
837 | return ERR_PTR(-ENODEV); | |
838 | } | |
839 | spin_unlock(&tpg->tpg_lun_lock); | |
840 | ||
841 | return lun; | |
842 | } | |
843 | ||
844 | int core_tpg_post_dellun( | |
845 | struct se_portal_group *tpg, | |
846 | struct se_lun *lun) | |
847 | { | |
848 | core_tpg_shutdown_lun(tpg, lun); | |
849 | ||
850 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
851 | ||
852 | spin_lock(&tpg->tpg_lun_lock); | |
853 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; | |
854 | spin_unlock(&tpg->tpg_lun_lock); | |
855 | ||
856 | return 0; | |
857 | } |