Commit | Line | Data |
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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 | * | |
4c76251e | 6 | * (c) Copyright 2002-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
26 | #include <linux/net.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/spinlock.h> | |
c66ac9db | 31 | #include <linux/in.h> |
c53181af | 32 | #include <linux/export.h> |
c66ac9db NB |
33 | #include <net/sock.h> |
34 | #include <net/tcp.h> | |
ba929992 | 35 | #include <scsi/scsi_proto.h> |
c66ac9db NB |
36 | |
37 | #include <target/target_core_base.h> | |
c4795fb2 CH |
38 | #include <target/target_core_backend.h> |
39 | #include <target/target_core_fabric.h> | |
c66ac9db | 40 | |
e26d99ae | 41 | #include "target_core_internal.h" |
adf653f9 | 42 | #include "target_core_alua.h" |
e2480563 | 43 | #include "target_core_pr.h" |
e986a35a | 44 | #include "target_core_ua.h" |
e3d6f909 AG |
45 | |
46 | extern struct se_device *g_lun0_dev; | |
47 | ||
48 | static DEFINE_SPINLOCK(tpg_lock); | |
49 | static LIST_HEAD(tpg_list); | |
c66ac9db | 50 | |
c66ac9db NB |
51 | /* __core_tpg_get_initiator_node_acl(): |
52 | * | |
403edd78 | 53 | * mutex_lock(&tpg->acl_node_mutex); must be held when calling |
c66ac9db NB |
54 | */ |
55 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
56 | struct se_portal_group *tpg, | |
57 | const char *initiatorname) | |
58 | { | |
59 | struct se_node_acl *acl; | |
60 | ||
61 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 62 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
63 | return acl; |
64 | } | |
65 | ||
66 | return NULL; | |
67 | } | |
68 | ||
69 | /* core_tpg_get_initiator_node_acl(): | |
70 | * | |
71 | * | |
72 | */ | |
73 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
74 | struct se_portal_group *tpg, | |
75 | unsigned char *initiatorname) | |
76 | { | |
77 | struct se_node_acl *acl; | |
78 | ||
403edd78 | 79 | mutex_lock(&tpg->acl_node_mutex); |
fcf29481 | 80 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
403edd78 | 81 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 82 | |
fcf29481 | 83 | return acl; |
c66ac9db | 84 | } |
b3fde035 | 85 | EXPORT_SYMBOL(core_tpg_get_initiator_node_acl); |
c66ac9db | 86 | |
e986a35a HR |
87 | void core_allocate_nexus_loss_ua( |
88 | struct se_node_acl *nacl) | |
89 | { | |
90 | struct se_dev_entry *deve; | |
91 | ||
92 | if (!nacl) | |
93 | return; | |
94 | ||
95 | rcu_read_lock(); | |
96 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) | |
97 | core_scsi3_ua_allocate(deve, 0x29, | |
98 | ASCQ_29H_NEXUS_LOSS_OCCURRED); | |
99 | rcu_read_unlock(); | |
100 | } | |
101 | EXPORT_SYMBOL(core_allocate_nexus_loss_ua); | |
102 | ||
c66ac9db NB |
103 | /* core_tpg_add_node_to_devs(): |
104 | * | |
105 | * | |
106 | */ | |
107 | void core_tpg_add_node_to_devs( | |
108 | struct se_node_acl *acl, | |
df9766ca NB |
109 | struct se_portal_group *tpg, |
110 | struct se_lun *lun_orig) | |
c66ac9db | 111 | { |
c66ac9db NB |
112 | u32 lun_access = 0; |
113 | struct se_lun *lun; | |
114 | struct se_device *dev; | |
115 | ||
6bb82612 NB |
116 | mutex_lock(&tpg->tpg_lun_mutex); |
117 | hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) { | |
df9766ca | 118 | if (lun_orig && lun != lun_orig) |
c66ac9db NB |
119 | continue; |
120 | ||
4cc987ea NB |
121 | dev = rcu_dereference_check(lun->lun_se_dev, |
122 | lockdep_is_held(&tpg->tpg_lun_mutex)); | |
c66ac9db NB |
123 | /* |
124 | * By default in LIO-Target $FABRIC_MOD, | |
125 | * demo_mode_write_protect is ON, or READ_ONLY; | |
126 | */ | |
6708bb27 | 127 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 128 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
129 | } else { |
130 | /* | |
131 | * Allow only optical drives to issue R/W in default RO | |
132 | * demo mode. | |
133 | */ | |
e3d6f909 | 134 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
135 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
136 | else | |
137 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
138 | } | |
139 | ||
f2d30680 | 140 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%llu] - Adding %s" |
c66ac9db | 141 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
142 | tpg->se_tpg_tfo->get_fabric_name(), |
143 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
144 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
145 | "READ-WRITE" : "READ-ONLY"); | |
146 | ||
e80ac6c4 | 147 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
6bb82612 | 148 | lun_access, acl, tpg); |
e2480563 NB |
149 | /* |
150 | * Check to see if there are any existing persistent reservation | |
151 | * APTPL pre-registrations that need to be enabled for this dynamic | |
152 | * LUN ACL now.. | |
153 | */ | |
154 | core_scsi3_check_aptpl_registration(dev, tpg, lun, acl, | |
155 | lun->unpacked_lun); | |
c66ac9db | 156 | } |
6bb82612 | 157 | mutex_unlock(&tpg->tpg_lun_mutex); |
c66ac9db NB |
158 | } |
159 | ||
160 | /* core_set_queue_depth_for_node(): | |
161 | * | |
162 | * | |
163 | */ | |
164 | static int core_set_queue_depth_for_node( | |
165 | struct se_portal_group *tpg, | |
166 | struct se_node_acl *acl) | |
167 | { | |
168 | if (!acl->queue_depth) { | |
6708bb27 | 169 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 170 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
171 | acl->initiatorname); |
172 | acl->queue_depth = 1; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
e413f472 CH |
178 | static struct se_node_acl *target_alloc_node_acl(struct se_portal_group *tpg, |
179 | const unsigned char *initiatorname) | |
4a5a75f3 | 180 | { |
c66ac9db | 181 | struct se_node_acl *acl; |
4a5a75f3 | 182 | |
144bc4c2 CH |
183 | acl = kzalloc(max(sizeof(*acl), tpg->se_tpg_tfo->node_acl_size), |
184 | GFP_KERNEL); | |
6708bb27 | 185 | if (!acl) |
c66ac9db | 186 | return NULL; |
4a5a75f3 | 187 | |
c66ac9db NB |
188 | INIT_LIST_HEAD(&acl->acl_list); |
189 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
29a05dee | 190 | INIT_HLIST_HEAD(&acl->lun_entry_hlist); |
afb999ff | 191 | kref_init(&acl->acl_kref); |
01468346 | 192 | init_completion(&acl->acl_free_comp); |
c66ac9db | 193 | spin_lock_init(&acl->nacl_sess_lock); |
29a05dee | 194 | mutex_init(&acl->lun_entry_mutex); |
c66ac9db | 195 | atomic_set(&acl->acl_pr_ref_count, 0); |
e1750d20 CH |
196 | if (tpg->se_tpg_tfo->tpg_get_default_depth) |
197 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); | |
198 | else | |
199 | acl->queue_depth = 1; | |
c66ac9db NB |
200 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
201 | acl->se_tpg = tpg; | |
202 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
4a5a75f3 | 203 | |
e3d6f909 | 204 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db | 205 | |
e413f472 | 206 | if (core_set_queue_depth_for_node(tpg, acl) < 0) |
29a05dee | 207 | goto out_free_acl; |
e413f472 CH |
208 | |
209 | return acl; | |
210 | ||
e413f472 | 211 | out_free_acl: |
144bc4c2 | 212 | kfree(acl); |
e413f472 | 213 | return NULL; |
4a5a75f3 JE |
214 | } |
215 | ||
e413f472 | 216 | static void target_add_node_acl(struct se_node_acl *acl) |
c66ac9db | 217 | { |
e413f472 | 218 | struct se_portal_group *tpg = acl->se_tpg; |
c66ac9db | 219 | |
403edd78 | 220 | mutex_lock(&tpg->acl_node_mutex); |
e413f472 | 221 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
403edd78 | 222 | mutex_unlock(&tpg->acl_node_mutex); |
e413f472 CH |
223 | |
224 | pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s" | |
225 | " Initiator Node: %s\n", | |
226 | tpg->se_tpg_tfo->get_fabric_name(), | |
227 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
228 | acl->dynamic_node_acl ? "DYNAMIC" : "", | |
229 | acl->queue_depth, | |
230 | tpg->se_tpg_tfo->get_fabric_name(), | |
231 | acl->initiatorname); | |
c66ac9db NB |
232 | } |
233 | ||
c66ac9db NB |
234 | struct se_node_acl *core_tpg_check_initiator_node_acl( |
235 | struct se_portal_group *tpg, | |
236 | unsigned char *initiatorname) | |
237 | { | |
238 | struct se_node_acl *acl; | |
239 | ||
240 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
6708bb27 | 241 | if (acl) |
c66ac9db NB |
242 | return acl; |
243 | ||
6708bb27 | 244 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
c66ac9db NB |
245 | return NULL; |
246 | ||
e413f472 | 247 | acl = target_alloc_node_acl(tpg, initiatorname); |
6708bb27 | 248 | if (!acl) |
c66ac9db | 249 | return NULL; |
c66ac9db NB |
250 | acl->dynamic_node_acl = 1; |
251 | ||
052605c6 NB |
252 | /* |
253 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 254 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
255 | * tpg_check_demo_mode_login_only() == 1. |
256 | */ | |
cdf88a2f AG |
257 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
258 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
df9766ca | 259 | core_tpg_add_node_to_devs(acl, tpg, NULL); |
c66ac9db | 260 | |
e413f472 | 261 | target_add_node_acl(acl); |
c66ac9db NB |
262 | return acl; |
263 | } | |
264 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
265 | ||
266 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
267 | { | |
268 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
269 | cpu_relax(); | |
270 | } | |
271 | ||
c66ac9db NB |
272 | struct se_node_acl *core_tpg_add_initiator_node_acl( |
273 | struct se_portal_group *tpg, | |
c7d6a803 | 274 | const char *initiatorname) |
c66ac9db | 275 | { |
c7d6a803 | 276 | struct se_node_acl *acl; |
c66ac9db | 277 | |
403edd78 | 278 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 279 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 280 | if (acl) { |
c66ac9db NB |
281 | if (acl->dynamic_node_acl) { |
282 | acl->dynamic_node_acl = 0; | |
6708bb27 | 283 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
284 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
285 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
403edd78 | 286 | mutex_unlock(&tpg->acl_node_mutex); |
e413f472 | 287 | return acl; |
c66ac9db NB |
288 | } |
289 | ||
6708bb27 | 290 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 291 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
292 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
293 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
403edd78 | 294 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
295 | return ERR_PTR(-EEXIST); |
296 | } | |
403edd78 | 297 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 298 | |
e413f472 CH |
299 | acl = target_alloc_node_acl(tpg, initiatorname); |
300 | if (!acl) | |
c66ac9db | 301 | return ERR_PTR(-ENOMEM); |
c66ac9db | 302 | |
e413f472 | 303 | target_add_node_acl(acl); |
c66ac9db NB |
304 | return acl; |
305 | } | |
c66ac9db | 306 | |
c7d6a803 | 307 | void core_tpg_del_initiator_node_acl(struct se_node_acl *acl) |
c66ac9db | 308 | { |
c7d6a803 | 309 | struct se_portal_group *tpg = acl->se_tpg; |
337c0607 | 310 | LIST_HEAD(sess_list); |
c66ac9db | 311 | struct se_session *sess, *sess_tmp; |
140854cb | 312 | unsigned long flags; |
28168905 | 313 | int rc; |
c66ac9db | 314 | |
403edd78 | 315 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
316 | if (acl->dynamic_node_acl) { |
317 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
318 | } |
319 | list_del(&acl->acl_list); | |
403edd78 | 320 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 321 | |
337c0607 NB |
322 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
323 | acl->acl_stop = 1; | |
324 | ||
325 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
326 | sess_acl_list) { | |
327 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
328 | continue; |
329 | ||
337c0607 NB |
330 | target_get_session(sess); |
331 | list_move(&sess->sess_acl_list, &sess_list); | |
332 | } | |
333 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
334 | ||
335 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
336 | list_del(&sess->sess_acl_list); | |
c66ac9db | 337 | |
337c0607 NB |
338 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
339 | target_put_session(sess); | |
340 | if (!rc) | |
341 | continue; | |
342 | target_put_session(sess); | |
c66ac9db | 343 | } |
337c0607 NB |
344 | target_put_nacl(acl); |
345 | /* | |
346 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
347 | * for active fabric session transport_deregister_session() callbacks. | |
348 | */ | |
349 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
350 | |
351 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
352 | core_free_device_list_for_node(acl, tpg); |
353 | ||
6708bb27 | 354 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
355 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
356 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
357 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db | 358 | |
144bc4c2 | 359 | kfree(acl); |
c66ac9db | 360 | } |
c66ac9db NB |
361 | |
362 | /* core_tpg_set_initiator_node_queue_depth(): | |
363 | * | |
364 | * | |
365 | */ | |
366 | int core_tpg_set_initiator_node_queue_depth( | |
367 | struct se_portal_group *tpg, | |
368 | unsigned char *initiatorname, | |
369 | u32 queue_depth, | |
370 | int force) | |
371 | { | |
372 | struct se_session *sess, *init_sess = NULL; | |
373 | struct se_node_acl *acl; | |
140854cb | 374 | unsigned long flags; |
c66ac9db NB |
375 | int dynamic_acl = 0; |
376 | ||
403edd78 | 377 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 378 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
379 | if (!acl) { |
380 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 381 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
382 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
383 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
403edd78 | 384 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
385 | return -ENODEV; |
386 | } | |
387 | if (acl->dynamic_node_acl) { | |
388 | acl->dynamic_node_acl = 0; | |
389 | dynamic_acl = 1; | |
390 | } | |
403edd78 | 391 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 392 | |
140854cb | 393 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
394 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
395 | if (sess->se_node_acl != acl) | |
396 | continue; | |
397 | ||
398 | if (!force) { | |
6708bb27 | 399 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
400 | " Initiator Node: %s while session is" |
401 | " operational. To forcefully change the queue" | |
402 | " depth and force session reinstatement" | |
403 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 404 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 405 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 406 | |
403edd78 | 407 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
408 | if (dynamic_acl) |
409 | acl->dynamic_node_acl = 1; | |
403edd78 | 410 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
411 | return -EEXIST; |
412 | } | |
413 | /* | |
414 | * Determine if the session needs to be closed by our context. | |
415 | */ | |
6708bb27 | 416 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
417 | continue; |
418 | ||
419 | init_sess = sess; | |
420 | break; | |
421 | } | |
422 | ||
423 | /* | |
424 | * User has requested to change the queue depth for a Initiator Node. | |
425 | * Change the value in the Node's struct se_node_acl, and call | |
426 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
427 | * | |
e3d6f909 | 428 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
429 | * reinstatement to occur if there is an active session for the |
430 | * $FABRIC_MOD Initiator Node in question. | |
431 | */ | |
432 | acl->queue_depth = queue_depth; | |
433 | ||
434 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 435 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
436 | /* |
437 | * Force session reinstatement if | |
438 | * core_set_queue_depth_for_node() failed, because we assume | |
439 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 440 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
441 | */ |
442 | if (init_sess) | |
e3d6f909 | 443 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 444 | |
403edd78 | 445 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
446 | if (dynamic_acl) |
447 | acl->dynamic_node_acl = 1; | |
403edd78 | 448 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
449 | return -EINVAL; |
450 | } | |
140854cb | 451 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
452 | /* |
453 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
454 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
455 | */ | |
456 | if (init_sess) | |
e3d6f909 | 457 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 458 | |
bfb9035c | 459 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 460 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
461 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
462 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 463 | |
403edd78 | 464 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
465 | if (dynamic_acl) |
466 | acl->dynamic_node_acl = 1; | |
403edd78 | 467 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
468 | |
469 | return 0; | |
470 | } | |
471 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
472 | ||
79e62fc3 AG |
473 | /* core_tpg_set_initiator_node_tag(): |
474 | * | |
475 | * Initiator nodeacl tags are not used internally, but may be used by | |
476 | * userspace to emulate aliases or groups. | |
477 | * Returns length of newly-set tag or -EINVAL. | |
478 | */ | |
479 | int core_tpg_set_initiator_node_tag( | |
480 | struct se_portal_group *tpg, | |
481 | struct se_node_acl *acl, | |
482 | const char *new_tag) | |
483 | { | |
484 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
485 | return -EINVAL; | |
486 | ||
487 | if (!strncmp("NULL", new_tag, 4)) { | |
488 | acl->acl_tag[0] = '\0'; | |
489 | return 0; | |
490 | } | |
491 | ||
492 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
493 | } | |
494 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
495 | ||
5277797d NB |
496 | static void core_tpg_lun_ref_release(struct percpu_ref *ref) |
497 | { | |
498 | struct se_lun *lun = container_of(ref, struct se_lun, lun_ref); | |
499 | ||
500 | complete(&lun->lun_ref_comp); | |
501 | } | |
502 | ||
c66ac9db | 503 | int core_tpg_register( |
c66ac9db NB |
504 | struct se_wwn *se_wwn, |
505 | struct se_portal_group *se_tpg, | |
e4aae5af | 506 | int proto_id) |
c66ac9db | 507 | { |
adf653f9 CH |
508 | int ret; |
509 | ||
bc0c94b1 NB |
510 | if (!se_tpg) |
511 | return -EINVAL; | |
512 | /* | |
513 | * For the typical case where core_tpg_register() is called by a | |
514 | * fabric driver from target_core_fabric_ops->fabric_make_tpg() | |
515 | * configfs context, use the original tf_ops pointer already saved | |
516 | * by target-core in target_fabric_make_wwn(). | |
517 | * | |
518 | * Otherwise, for special cases like iscsi-target discovery TPGs | |
519 | * the caller is responsible for setting ->se_tpg_tfo ahead of | |
520 | * calling core_tpg_register(). | |
521 | */ | |
522 | if (se_wwn) | |
523 | se_tpg->se_tpg_tfo = se_wwn->wwn_tf->tf_ops; | |
c66ac9db | 524 | |
bc0c94b1 NB |
525 | if (!se_tpg->se_tpg_tfo) { |
526 | pr_err("Unable to locate se_tpg->se_tpg_tfo pointer\n"); | |
527 | return -EINVAL; | |
c66ac9db NB |
528 | } |
529 | ||
6bb82612 | 530 | INIT_HLIST_HEAD(&se_tpg->tpg_lun_hlist); |
e4aae5af | 531 | se_tpg->proto_id = proto_id; |
c66ac9db NB |
532 | se_tpg->se_tpg_wwn = se_wwn; |
533 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
534 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 535 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db | 536 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
c66ac9db | 537 | spin_lock_init(&se_tpg->session_lock); |
6bb82612 | 538 | mutex_init(&se_tpg->tpg_lun_mutex); |
403edd78 | 539 | mutex_init(&se_tpg->acl_node_mutex); |
c66ac9db | 540 | |
e4aae5af | 541 | if (se_tpg->proto_id >= 0) { |
adf653f9 CH |
542 | se_tpg->tpg_virt_lun0 = core_tpg_alloc_lun(se_tpg, 0); |
543 | if (IS_ERR(se_tpg->tpg_virt_lun0)) | |
544 | return PTR_ERR(se_tpg->tpg_virt_lun0); | |
545 | ||
546 | ret = core_tpg_add_lun(se_tpg, se_tpg->tpg_virt_lun0, | |
547 | TRANSPORT_LUNFLAGS_READ_ONLY, g_lun0_dev); | |
548 | if (ret < 0) { | |
549 | kfree(se_tpg->tpg_virt_lun0); | |
550 | return ret; | |
c66ac9db NB |
551 | } |
552 | } | |
553 | ||
e3d6f909 AG |
554 | spin_lock_bh(&tpg_lock); |
555 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
556 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 557 | |
e4aae5af | 558 | pr_debug("TARGET_CORE[%s]: Allocated portal_group for endpoint: %s, " |
bc0c94b1 NB |
559 | "Proto: %d, Portal Tag: %u\n", se_tpg->se_tpg_tfo->get_fabric_name(), |
560 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg) ? | |
561 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg) : NULL, | |
562 | se_tpg->proto_id, se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); | |
c66ac9db NB |
563 | |
564 | return 0; | |
565 | } | |
566 | EXPORT_SYMBOL(core_tpg_register); | |
567 | ||
568 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
569 | { | |
e4aae5af | 570 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
e89d15ee | 571 | struct se_node_acl *nacl, *nacl_tmp; |
22793de5 | 572 | LIST_HEAD(node_list); |
e89d15ee | 573 | |
e4aae5af CH |
574 | pr_debug("TARGET_CORE[%s]: Deallocating portal_group for endpoint: %s, " |
575 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), | |
576 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, | |
577 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 578 | |
e3d6f909 AG |
579 | spin_lock_bh(&tpg_lock); |
580 | list_del(&se_tpg->se_tpg_node); | |
581 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
582 | |
583 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
584 | cpu_relax(); | |
403edd78 | 585 | |
22793de5 NB |
586 | mutex_lock(&se_tpg->acl_node_mutex); |
587 | list_splice_init(&se_tpg->acl_node_list, &node_list); | |
588 | mutex_unlock(&se_tpg->acl_node_mutex); | |
e89d15ee NB |
589 | /* |
590 | * Release any remaining demo-mode generated se_node_acl that have | |
591 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
592 | * in transport_deregister_session(). | |
593 | */ | |
22793de5 | 594 | list_for_each_entry_safe(nacl, nacl_tmp, &node_list, acl_list) { |
e89d15ee | 595 | list_del(&nacl->acl_list); |
e89d15ee NB |
596 | |
597 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
598 | core_free_device_list_for_node(nacl, se_tpg); | |
144bc4c2 | 599 | kfree(nacl); |
e89d15ee | 600 | } |
c66ac9db | 601 | |
adf653f9 CH |
602 | if (se_tpg->proto_id >= 0) { |
603 | core_tpg_remove_lun(se_tpg, se_tpg->tpg_virt_lun0); | |
604 | kfree_rcu(se_tpg->tpg_virt_lun0, rcu_head); | |
605 | } | |
c66ac9db | 606 | |
c66ac9db NB |
607 | return 0; |
608 | } | |
609 | EXPORT_SYMBOL(core_tpg_deregister); | |
610 | ||
d344f8a1 | 611 | struct se_lun *core_tpg_alloc_lun( |
c66ac9db | 612 | struct se_portal_group *tpg, |
f2d30680 | 613 | u64 unpacked_lun) |
c66ac9db NB |
614 | { |
615 | struct se_lun *lun; | |
616 | ||
6bb82612 NB |
617 | lun = kzalloc(sizeof(*lun), GFP_KERNEL); |
618 | if (!lun) { | |
619 | pr_err("Unable to allocate se_lun memory\n"); | |
620 | return ERR_PTR(-ENOMEM); | |
c66ac9db | 621 | } |
6bb82612 NB |
622 | lun->unpacked_lun = unpacked_lun; |
623 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; | |
6bb82612 | 624 | atomic_set(&lun->lun_acl_count, 0); |
6bb82612 | 625 | init_completion(&lun->lun_ref_comp); |
adf653f9 CH |
626 | INIT_LIST_HEAD(&lun->lun_deve_list); |
627 | INIT_LIST_HEAD(&lun->lun_dev_link); | |
628 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); | |
629 | spin_lock_init(&lun->lun_deve_lock); | |
630 | mutex_init(&lun->lun_tg_pt_md_mutex); | |
631 | INIT_LIST_HEAD(&lun->lun_tg_pt_gp_link); | |
632 | spin_lock_init(&lun->lun_tg_pt_gp_lock); | |
adf653f9 | 633 | lun->lun_tpg = tpg; |
c66ac9db NB |
634 | |
635 | return lun; | |
636 | } | |
637 | ||
d344f8a1 | 638 | int core_tpg_add_lun( |
c66ac9db NB |
639 | struct se_portal_group *tpg, |
640 | struct se_lun *lun, | |
641 | u32 lun_access, | |
340dbf72 | 642 | struct se_device *dev) |
c66ac9db | 643 | { |
e3d6f909 AG |
644 | int ret; |
645 | ||
2aad2a86 | 646 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0, |
a34375ef | 647 | GFP_KERNEL); |
e3d6f909 | 648 | if (ret < 0) |
adf653f9 | 649 | goto out; |
c66ac9db | 650 | |
adf653f9 CH |
651 | ret = core_alloc_rtpi(lun, dev); |
652 | if (ret) | |
653 | goto out_kill_ref; | |
654 | ||
655 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && | |
656 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) | |
657 | target_attach_tg_pt_gp(lun, dev->t10_alua.default_tg_pt_gp); | |
5277797d | 658 | |
6bb82612 | 659 | mutex_lock(&tpg->tpg_lun_mutex); |
adf653f9 | 660 | |
adf653f9 | 661 | spin_lock(&dev->se_port_lock); |
4cc987ea | 662 | lun->lun_index = dev->dev_index; |
adf653f9 CH |
663 | rcu_assign_pointer(lun->lun_se_dev, dev); |
664 | dev->export_count++; | |
665 | list_add_tail(&lun->lun_dev_link, &dev->dev_sep_list); | |
666 | spin_unlock(&dev->se_port_lock); | |
5277797d | 667 | |
eeeb9522 NB |
668 | if (dev->dev_flags & DF_READ_ONLY) |
669 | lun->lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
670 | else | |
671 | lun->lun_access = lun_access; | |
6bb82612 NB |
672 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
673 | hlist_add_head_rcu(&lun->link, &tpg->tpg_lun_hlist); | |
674 | mutex_unlock(&tpg->tpg_lun_mutex); | |
c66ac9db NB |
675 | |
676 | return 0; | |
adf653f9 CH |
677 | |
678 | out_kill_ref: | |
679 | percpu_ref_exit(&lun->lun_ref); | |
680 | out: | |
681 | return ret; | |
c66ac9db NB |
682 | } |
683 | ||
cd9d7cba | 684 | void core_tpg_remove_lun( |
c66ac9db NB |
685 | struct se_portal_group *tpg, |
686 | struct se_lun *lun) | |
687 | { | |
4cc987ea NB |
688 | /* |
689 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
690 | * reference to se_device->dev_group. | |
691 | */ | |
692 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
6bb82612 | 693 | |
4a9a6c8d | 694 | core_clear_lun_from_tpg(lun, tpg); |
9e37d042 NB |
695 | /* |
696 | * Wait for any active I/O references to percpu se_lun->lun_ref to | |
697 | * be released. Also, se_lun->lun_ref is now used by PR and ALUA | |
698 | * logic when referencing a remote target port during ALL_TGT_PT=1 | |
699 | * and generating UNIT_ATTENTIONs for ALUA access state transition. | |
700 | */ | |
4a9a6c8d | 701 | transport_clear_lun_ref(lun); |
c66ac9db | 702 | |
6bb82612 | 703 | mutex_lock(&tpg->tpg_lun_mutex); |
adf653f9 | 704 | if (lun->lun_se_dev) { |
adf653f9 | 705 | target_detach_tg_pt_gp(lun); |
c66ac9db | 706 | |
adf653f9 CH |
707 | spin_lock(&dev->se_port_lock); |
708 | list_del(&lun->lun_dev_link); | |
709 | dev->export_count--; | |
710 | rcu_assign_pointer(lun->lun_se_dev, NULL); | |
711 | spin_unlock(&dev->se_port_lock); | |
712 | } | |
6bb82612 NB |
713 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
714 | hlist_del_rcu(&lun->link); | |
715 | mutex_unlock(&tpg->tpg_lun_mutex); | |
c66ac9db | 716 | |
9a1049da | 717 | percpu_ref_exit(&lun->lun_ref); |
c66ac9db | 718 | } |