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> | |
35 | #include <scsi/scsi.h> | |
36 | #include <scsi/scsi_cmnd.h> | |
37 | ||
38 | #include <target/target_core_base.h> | |
c4795fb2 CH |
39 | #include <target/target_core_backend.h> |
40 | #include <target/target_core_fabric.h> | |
c66ac9db | 41 | |
e26d99ae | 42 | #include "target_core_internal.h" |
e2480563 | 43 | #include "target_core_pr.h" |
e3d6f909 AG |
44 | |
45 | extern struct se_device *g_lun0_dev; | |
46 | ||
47 | static DEFINE_SPINLOCK(tpg_lock); | |
48 | static LIST_HEAD(tpg_list); | |
c66ac9db | 49 | |
c66ac9db NB |
50 | /* __core_tpg_get_initiator_node_acl(): |
51 | * | |
403edd78 | 52 | * mutex_lock(&tpg->acl_node_mutex); must be held when calling |
c66ac9db NB |
53 | */ |
54 | struct se_node_acl *__core_tpg_get_initiator_node_acl( | |
55 | struct se_portal_group *tpg, | |
56 | const char *initiatorname) | |
57 | { | |
58 | struct se_node_acl *acl; | |
59 | ||
60 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
6708bb27 | 61 | if (!strcmp(acl->initiatorname, initiatorname)) |
c66ac9db NB |
62 | return acl; |
63 | } | |
64 | ||
65 | return NULL; | |
66 | } | |
67 | ||
68 | /* core_tpg_get_initiator_node_acl(): | |
69 | * | |
70 | * | |
71 | */ | |
72 | struct se_node_acl *core_tpg_get_initiator_node_acl( | |
73 | struct se_portal_group *tpg, | |
74 | unsigned char *initiatorname) | |
75 | { | |
76 | struct se_node_acl *acl; | |
77 | ||
403edd78 | 78 | mutex_lock(&tpg->acl_node_mutex); |
fcf29481 | 79 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
403edd78 | 80 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 81 | |
fcf29481 | 82 | return acl; |
c66ac9db | 83 | } |
b3fde035 | 84 | EXPORT_SYMBOL(core_tpg_get_initiator_node_acl); |
c66ac9db NB |
85 | |
86 | /* core_tpg_add_node_to_devs(): | |
87 | * | |
88 | * | |
89 | */ | |
90 | void core_tpg_add_node_to_devs( | |
91 | struct se_node_acl *acl, | |
df9766ca NB |
92 | struct se_portal_group *tpg, |
93 | struct se_lun *lun_orig) | |
c66ac9db | 94 | { |
c66ac9db NB |
95 | u32 lun_access = 0; |
96 | struct se_lun *lun; | |
97 | struct se_device *dev; | |
98 | ||
6bb82612 NB |
99 | mutex_lock(&tpg->tpg_lun_mutex); |
100 | hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) { | |
df9766ca NB |
101 | if (lun_orig && lun != lun_orig) |
102 | continue; | |
c66ac9db | 103 | |
c66ac9db NB |
104 | dev = lun->lun_se_dev; |
105 | /* | |
106 | * By default in LIO-Target $FABRIC_MOD, | |
107 | * demo_mode_write_protect is ON, or READ_ONLY; | |
108 | */ | |
6708bb27 | 109 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
58d92618 | 110 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
c66ac9db NB |
111 | } else { |
112 | /* | |
113 | * Allow only optical drives to issue R/W in default RO | |
114 | * demo mode. | |
115 | */ | |
e3d6f909 | 116 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
c66ac9db NB |
117 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
118 | else | |
119 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
120 | } | |
121 | ||
6708bb27 | 122 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
c66ac9db | 123 | " access for LUN in Demo Mode\n", |
e3d6f909 AG |
124 | tpg->se_tpg_tfo->get_fabric_name(), |
125 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
c66ac9db NB |
126 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
127 | "READ-WRITE" : "READ-ONLY"); | |
128 | ||
e80ac6c4 | 129 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
6bb82612 | 130 | lun_access, acl, tpg); |
e2480563 NB |
131 | /* |
132 | * Check to see if there are any existing persistent reservation | |
133 | * APTPL pre-registrations that need to be enabled for this dynamic | |
134 | * LUN ACL now.. | |
135 | */ | |
136 | core_scsi3_check_aptpl_registration(dev, tpg, lun, acl, | |
137 | lun->unpacked_lun); | |
c66ac9db | 138 | } |
6bb82612 | 139 | mutex_unlock(&tpg->tpg_lun_mutex); |
c66ac9db NB |
140 | } |
141 | ||
142 | /* core_set_queue_depth_for_node(): | |
143 | * | |
144 | * | |
145 | */ | |
146 | static int core_set_queue_depth_for_node( | |
147 | struct se_portal_group *tpg, | |
148 | struct se_node_acl *acl) | |
149 | { | |
150 | if (!acl->queue_depth) { | |
6708bb27 | 151 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
e3d6f909 | 152 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
153 | acl->initiatorname); |
154 | acl->queue_depth = 1; | |
155 | } | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
e413f472 CH |
160 | static struct se_node_acl *target_alloc_node_acl(struct se_portal_group *tpg, |
161 | const unsigned char *initiatorname) | |
c66ac9db NB |
162 | { |
163 | struct se_node_acl *acl; | |
164 | ||
144bc4c2 CH |
165 | acl = kzalloc(max(sizeof(*acl), tpg->se_tpg_tfo->node_acl_size), |
166 | GFP_KERNEL); | |
6708bb27 | 167 | if (!acl) |
c66ac9db NB |
168 | return NULL; |
169 | ||
170 | INIT_LIST_HEAD(&acl->acl_list); | |
171 | INIT_LIST_HEAD(&acl->acl_sess_list); | |
29a05dee | 172 | INIT_HLIST_HEAD(&acl->lun_entry_hlist); |
afb999ff | 173 | kref_init(&acl->acl_kref); |
01468346 | 174 | init_completion(&acl->acl_free_comp); |
c66ac9db | 175 | spin_lock_init(&acl->nacl_sess_lock); |
29a05dee | 176 | mutex_init(&acl->lun_entry_mutex); |
c66ac9db | 177 | atomic_set(&acl->acl_pr_ref_count, 0); |
e1750d20 CH |
178 | if (tpg->se_tpg_tfo->tpg_get_default_depth) |
179 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); | |
180 | else | |
181 | acl->queue_depth = 1; | |
c66ac9db NB |
182 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
183 | acl->se_tpg = tpg; | |
184 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); | |
c66ac9db | 185 | |
e3d6f909 | 186 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
c66ac9db | 187 | |
e413f472 | 188 | if (core_set_queue_depth_for_node(tpg, acl) < 0) |
29a05dee | 189 | goto out_free_acl; |
e413f472 CH |
190 | |
191 | return acl; | |
192 | ||
e413f472 | 193 | out_free_acl: |
144bc4c2 | 194 | kfree(acl); |
e413f472 CH |
195 | return NULL; |
196 | } | |
197 | ||
198 | static void target_add_node_acl(struct se_node_acl *acl) | |
199 | { | |
200 | struct se_portal_group *tpg = acl->se_tpg; | |
201 | ||
403edd78 | 202 | mutex_lock(&tpg->acl_node_mutex); |
e413f472 CH |
203 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
204 | tpg->num_node_acls++; | |
403edd78 | 205 | mutex_unlock(&tpg->acl_node_mutex); |
e413f472 CH |
206 | |
207 | pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s" | |
208 | " Initiator Node: %s\n", | |
209 | tpg->se_tpg_tfo->get_fabric_name(), | |
210 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
211 | acl->dynamic_node_acl ? "DYNAMIC" : "", | |
212 | acl->queue_depth, | |
213 | tpg->se_tpg_tfo->get_fabric_name(), | |
214 | acl->initiatorname); | |
215 | } | |
216 | ||
217 | struct se_node_acl *core_tpg_check_initiator_node_acl( | |
218 | struct se_portal_group *tpg, | |
219 | unsigned char *initiatorname) | |
220 | { | |
221 | struct se_node_acl *acl; | |
222 | ||
223 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
224 | if (acl) | |
225 | return acl; | |
226 | ||
227 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) | |
c66ac9db | 228 | return NULL; |
c66ac9db | 229 | |
e413f472 CH |
230 | acl = target_alloc_node_acl(tpg, initiatorname); |
231 | if (!acl) | |
c66ac9db | 232 | return NULL; |
e413f472 CH |
233 | acl->dynamic_node_acl = 1; |
234 | ||
052605c6 NB |
235 | /* |
236 | * Here we only create demo-mode MappedLUNs from the active | |
35d1efe8 | 237 | * TPG LUNs if the fabric is not explicitly asking for |
052605c6 NB |
238 | * tpg_check_demo_mode_login_only() == 1. |
239 | */ | |
cdf88a2f AG |
240 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
241 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) | |
df9766ca | 242 | core_tpg_add_node_to_devs(acl, tpg, NULL); |
c66ac9db | 243 | |
e413f472 | 244 | target_add_node_acl(acl); |
c66ac9db NB |
245 | return acl; |
246 | } | |
247 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); | |
248 | ||
249 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) | |
250 | { | |
251 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) | |
252 | cpu_relax(); | |
253 | } | |
254 | ||
c66ac9db NB |
255 | struct se_node_acl *core_tpg_add_initiator_node_acl( |
256 | struct se_portal_group *tpg, | |
c7d6a803 | 257 | const char *initiatorname) |
c66ac9db | 258 | { |
c7d6a803 | 259 | struct se_node_acl *acl; |
c66ac9db | 260 | |
403edd78 | 261 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 262 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 | 263 | if (acl) { |
c66ac9db NB |
264 | if (acl->dynamic_node_acl) { |
265 | acl->dynamic_node_acl = 0; | |
6708bb27 | 266 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
e3d6f909 AG |
267 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
268 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); | |
403edd78 | 269 | mutex_unlock(&tpg->acl_node_mutex); |
e413f472 | 270 | return acl; |
c66ac9db NB |
271 | } |
272 | ||
6708bb27 | 273 | pr_err("ACL entry for %s Initiator" |
c66ac9db | 274 | " Node %s already exists for TPG %u, ignoring" |
e3d6f909 AG |
275 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
276 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
403edd78 | 277 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
278 | return ERR_PTR(-EEXIST); |
279 | } | |
403edd78 | 280 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 281 | |
e413f472 CH |
282 | acl = target_alloc_node_acl(tpg, initiatorname); |
283 | if (!acl) | |
c66ac9db | 284 | return ERR_PTR(-ENOMEM); |
c66ac9db | 285 | |
e413f472 | 286 | target_add_node_acl(acl); |
c66ac9db NB |
287 | return acl; |
288 | } | |
c66ac9db | 289 | |
c7d6a803 | 290 | void core_tpg_del_initiator_node_acl(struct se_node_acl *acl) |
c66ac9db | 291 | { |
c7d6a803 | 292 | struct se_portal_group *tpg = acl->se_tpg; |
337c0607 | 293 | LIST_HEAD(sess_list); |
c66ac9db | 294 | struct se_session *sess, *sess_tmp; |
140854cb | 295 | unsigned long flags; |
28168905 | 296 | int rc; |
c66ac9db | 297 | |
403edd78 | 298 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
299 | if (acl->dynamic_node_acl) { |
300 | acl->dynamic_node_acl = 0; | |
c66ac9db NB |
301 | } |
302 | list_del(&acl->acl_list); | |
303 | tpg->num_node_acls--; | |
403edd78 | 304 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 305 | |
337c0607 NB |
306 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
307 | acl->acl_stop = 1; | |
308 | ||
309 | list_for_each_entry_safe(sess, sess_tmp, &acl->acl_sess_list, | |
310 | sess_acl_list) { | |
311 | if (sess->sess_tearing_down != 0) | |
c66ac9db NB |
312 | continue; |
313 | ||
337c0607 NB |
314 | target_get_session(sess); |
315 | list_move(&sess->sess_acl_list, &sess_list); | |
316 | } | |
317 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); | |
318 | ||
319 | list_for_each_entry_safe(sess, sess_tmp, &sess_list, sess_acl_list) { | |
320 | list_del(&sess->sess_acl_list); | |
c66ac9db | 321 | |
337c0607 NB |
322 | rc = tpg->se_tpg_tfo->shutdown_session(sess); |
323 | target_put_session(sess); | |
324 | if (!rc) | |
325 | continue; | |
326 | target_put_session(sess); | |
c66ac9db | 327 | } |
337c0607 NB |
328 | target_put_nacl(acl); |
329 | /* | |
330 | * Wait for last target_put_nacl() to complete in target_complete_nacl() | |
331 | * for active fabric session transport_deregister_session() callbacks. | |
332 | */ | |
333 | wait_for_completion(&acl->acl_free_comp); | |
c66ac9db NB |
334 | |
335 | core_tpg_wait_for_nacl_pr_ref(acl); | |
c66ac9db NB |
336 | core_free_device_list_for_node(acl, tpg); |
337 | ||
6708bb27 | 338 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
e3d6f909 AG |
339 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
340 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, | |
341 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); | |
c66ac9db | 342 | |
144bc4c2 | 343 | kfree(acl); |
c66ac9db | 344 | } |
c66ac9db NB |
345 | |
346 | /* core_tpg_set_initiator_node_queue_depth(): | |
347 | * | |
348 | * | |
349 | */ | |
350 | int core_tpg_set_initiator_node_queue_depth( | |
351 | struct se_portal_group *tpg, | |
352 | unsigned char *initiatorname, | |
353 | u32 queue_depth, | |
354 | int force) | |
355 | { | |
356 | struct se_session *sess, *init_sess = NULL; | |
357 | struct se_node_acl *acl; | |
140854cb | 358 | unsigned long flags; |
c66ac9db NB |
359 | int dynamic_acl = 0; |
360 | ||
403edd78 | 361 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 362 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
6708bb27 AG |
363 | if (!acl) { |
364 | pr_err("Access Control List entry for %s Initiator" | |
c66ac9db | 365 | " Node %s does not exists for TPG %hu, ignoring" |
e3d6f909 AG |
366 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
367 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
403edd78 | 368 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
369 | return -ENODEV; |
370 | } | |
371 | if (acl->dynamic_node_acl) { | |
372 | acl->dynamic_node_acl = 0; | |
373 | dynamic_acl = 1; | |
374 | } | |
403edd78 | 375 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db | 376 | |
140854cb | 377 | spin_lock_irqsave(&tpg->session_lock, flags); |
c66ac9db NB |
378 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
379 | if (sess->se_node_acl != acl) | |
380 | continue; | |
381 | ||
382 | if (!force) { | |
6708bb27 | 383 | pr_err("Unable to change queue depth for %s" |
c66ac9db NB |
384 | " Initiator Node: %s while session is" |
385 | " operational. To forcefully change the queue" | |
386 | " depth and force session reinstatement" | |
387 | " use the \"force=1\" parameter.\n", | |
e3d6f909 | 388 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
140854cb | 389 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db | 390 | |
403edd78 | 391 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
392 | if (dynamic_acl) |
393 | acl->dynamic_node_acl = 1; | |
403edd78 | 394 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
395 | return -EEXIST; |
396 | } | |
397 | /* | |
398 | * Determine if the session needs to be closed by our context. | |
399 | */ | |
6708bb27 | 400 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
c66ac9db NB |
401 | continue; |
402 | ||
403 | init_sess = sess; | |
404 | break; | |
405 | } | |
406 | ||
407 | /* | |
408 | * User has requested to change the queue depth for a Initiator Node. | |
409 | * Change the value in the Node's struct se_node_acl, and call | |
410 | * core_set_queue_depth_for_node() to add the requested queue depth. | |
411 | * | |
e3d6f909 | 412 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
c66ac9db NB |
413 | * reinstatement to occur if there is an active session for the |
414 | * $FABRIC_MOD Initiator Node in question. | |
415 | */ | |
416 | acl->queue_depth = queue_depth; | |
417 | ||
418 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { | |
140854cb | 419 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
420 | /* |
421 | * Force session reinstatement if | |
422 | * core_set_queue_depth_for_node() failed, because we assume | |
423 | * the $FABRIC_MOD has already the set session reinstatement | |
e3d6f909 | 424 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
c66ac9db NB |
425 | */ |
426 | if (init_sess) | |
e3d6f909 | 427 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 428 | |
403edd78 | 429 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
430 | if (dynamic_acl) |
431 | acl->dynamic_node_acl = 1; | |
403edd78 | 432 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
433 | return -EINVAL; |
434 | } | |
140854cb | 435 | spin_unlock_irqrestore(&tpg->session_lock, flags); |
c66ac9db NB |
436 | /* |
437 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, | |
438 | * forcefully shutdown the $FABRIC_MOD session/nexus. | |
439 | */ | |
440 | if (init_sess) | |
e3d6f909 | 441 | tpg->se_tpg_tfo->close_session(init_sess); |
c66ac9db | 442 | |
bfb9035c | 443 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
c66ac9db | 444 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
e3d6f909 AG |
445 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
446 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); | |
c66ac9db | 447 | |
403edd78 | 448 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db NB |
449 | if (dynamic_acl) |
450 | acl->dynamic_node_acl = 1; | |
403edd78 | 451 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
452 | |
453 | return 0; | |
454 | } | |
455 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); | |
456 | ||
79e62fc3 AG |
457 | /* core_tpg_set_initiator_node_tag(): |
458 | * | |
459 | * Initiator nodeacl tags are not used internally, but may be used by | |
460 | * userspace to emulate aliases or groups. | |
461 | * Returns length of newly-set tag or -EINVAL. | |
462 | */ | |
463 | int core_tpg_set_initiator_node_tag( | |
464 | struct se_portal_group *tpg, | |
465 | struct se_node_acl *acl, | |
466 | const char *new_tag) | |
467 | { | |
468 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) | |
469 | return -EINVAL; | |
470 | ||
471 | if (!strncmp("NULL", new_tag, 4)) { | |
472 | acl->acl_tag[0] = '\0'; | |
473 | return 0; | |
474 | } | |
475 | ||
476 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); | |
477 | } | |
478 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); | |
479 | ||
5277797d NB |
480 | static void core_tpg_lun_ref_release(struct percpu_ref *ref) |
481 | { | |
482 | struct se_lun *lun = container_of(ref, struct se_lun, lun_ref); | |
483 | ||
484 | complete(&lun->lun_ref_comp); | |
485 | } | |
486 | ||
c66ac9db NB |
487 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) |
488 | { | |
489 | /* Set in core_dev_setup_virtual_lun0() */ | |
e3d6f909 | 490 | struct se_device *dev = g_lun0_dev; |
c66ac9db NB |
491 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
492 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
493 | int ret; | |
494 | ||
495 | lun->unpacked_lun = 0; | |
c66ac9db | 496 | atomic_set(&lun->lun_acl_count, 0); |
c66ac9db | 497 | spin_lock_init(&lun->lun_sep_lock); |
5277797d | 498 | init_completion(&lun->lun_ref_comp); |
c66ac9db | 499 | |
d344f8a1 | 500 | ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev); |
de06875f | 501 | if (ret < 0) |
5277797d | 502 | return ret; |
5277797d | 503 | |
c66ac9db NB |
504 | return 0; |
505 | } | |
506 | ||
c66ac9db | 507 | int core_tpg_register( |
9ac8928e | 508 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
509 | struct se_wwn *se_wwn, |
510 | struct se_portal_group *se_tpg, | |
e4aae5af | 511 | int proto_id) |
c66ac9db | 512 | { |
6bb82612 | 513 | INIT_HLIST_HEAD(&se_tpg->tpg_lun_hlist); |
e4aae5af | 514 | se_tpg->proto_id = proto_id; |
c66ac9db NB |
515 | se_tpg->se_tpg_tfo = tfo; |
516 | se_tpg->se_tpg_wwn = se_wwn; | |
517 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); | |
518 | INIT_LIST_HEAD(&se_tpg->acl_node_list); | |
e3d6f909 | 519 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
c66ac9db | 520 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
c66ac9db | 521 | spin_lock_init(&se_tpg->session_lock); |
6bb82612 | 522 | mutex_init(&se_tpg->tpg_lun_mutex); |
403edd78 | 523 | mutex_init(&se_tpg->acl_node_mutex); |
c66ac9db | 524 | |
e4aae5af | 525 | if (se_tpg->proto_id >= 0) { |
6bb82612 | 526 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) |
c66ac9db | 527 | return -ENOMEM; |
c66ac9db NB |
528 | } |
529 | ||
e3d6f909 AG |
530 | spin_lock_bh(&tpg_lock); |
531 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); | |
532 | spin_unlock_bh(&tpg_lock); | |
c66ac9db | 533 | |
e4aae5af CH |
534 | pr_debug("TARGET_CORE[%s]: Allocated portal_group for endpoint: %s, " |
535 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), | |
536 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, | |
537 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); | |
c66ac9db NB |
538 | |
539 | return 0; | |
540 | } | |
541 | EXPORT_SYMBOL(core_tpg_register); | |
542 | ||
543 | int core_tpg_deregister(struct se_portal_group *se_tpg) | |
544 | { | |
e4aae5af | 545 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
e89d15ee | 546 | struct se_node_acl *nacl, *nacl_tmp; |
22793de5 | 547 | LIST_HEAD(node_list); |
e89d15ee | 548 | |
e4aae5af CH |
549 | pr_debug("TARGET_CORE[%s]: Deallocating portal_group for endpoint: %s, " |
550 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), | |
551 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, | |
552 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); | |
c66ac9db | 553 | |
e3d6f909 AG |
554 | spin_lock_bh(&tpg_lock); |
555 | list_del(&se_tpg->se_tpg_node); | |
556 | spin_unlock_bh(&tpg_lock); | |
c66ac9db NB |
557 | |
558 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) | |
559 | cpu_relax(); | |
403edd78 | 560 | |
22793de5 NB |
561 | mutex_lock(&se_tpg->acl_node_mutex); |
562 | list_splice_init(&se_tpg->acl_node_list, &node_list); | |
563 | mutex_unlock(&se_tpg->acl_node_mutex); | |
e89d15ee NB |
564 | /* |
565 | * Release any remaining demo-mode generated se_node_acl that have | |
566 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 | |
567 | * in transport_deregister_session(). | |
568 | */ | |
22793de5 | 569 | list_for_each_entry_safe(nacl, nacl_tmp, &node_list, acl_list) { |
e89d15ee NB |
570 | list_del(&nacl->acl_list); |
571 | se_tpg->num_node_acls--; | |
e89d15ee NB |
572 | |
573 | core_tpg_wait_for_nacl_pr_ref(nacl); | |
574 | core_free_device_list_for_node(nacl, se_tpg); | |
144bc4c2 | 575 | kfree(nacl); |
e89d15ee | 576 | } |
c66ac9db | 577 | |
e4aae5af | 578 | if (se_tpg->proto_id >= 0) |
9c7d6154 | 579 | core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0); |
c66ac9db | 580 | |
c66ac9db NB |
581 | return 0; |
582 | } | |
583 | EXPORT_SYMBOL(core_tpg_deregister); | |
584 | ||
d344f8a1 | 585 | struct se_lun *core_tpg_alloc_lun( |
c66ac9db NB |
586 | struct se_portal_group *tpg, |
587 | u32 unpacked_lun) | |
588 | { | |
589 | struct se_lun *lun; | |
590 | ||
591 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
6708bb27 | 592 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
c66ac9db | 593 | "-1: %u for Target Portal Group: %u\n", |
e3d6f909 | 594 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 595 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
e3d6f909 | 596 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
c66ac9db NB |
597 | return ERR_PTR(-EOVERFLOW); |
598 | } | |
599 | ||
6bb82612 NB |
600 | lun = kzalloc(sizeof(*lun), GFP_KERNEL); |
601 | if (!lun) { | |
602 | pr_err("Unable to allocate se_lun memory\n"); | |
603 | return ERR_PTR(-ENOMEM); | |
c66ac9db | 604 | } |
6bb82612 NB |
605 | lun->unpacked_lun = unpacked_lun; |
606 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; | |
6bb82612 | 607 | atomic_set(&lun->lun_acl_count, 0); |
6bb82612 NB |
608 | spin_lock_init(&lun->lun_sep_lock); |
609 | init_completion(&lun->lun_ref_comp); | |
c66ac9db NB |
610 | |
611 | return lun; | |
612 | } | |
613 | ||
d344f8a1 | 614 | int core_tpg_add_lun( |
c66ac9db NB |
615 | struct se_portal_group *tpg, |
616 | struct se_lun *lun, | |
617 | u32 lun_access, | |
340dbf72 | 618 | struct se_device *dev) |
c66ac9db | 619 | { |
e3d6f909 AG |
620 | int ret; |
621 | ||
2aad2a86 | 622 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0, |
a34375ef | 623 | GFP_KERNEL); |
e3d6f909 AG |
624 | if (ret < 0) |
625 | return ret; | |
c66ac9db | 626 | |
340dbf72 | 627 | ret = core_dev_export(dev, tpg, lun); |
5277797d | 628 | if (ret < 0) { |
9a1049da | 629 | percpu_ref_exit(&lun->lun_ref); |
5277797d NB |
630 | return ret; |
631 | } | |
632 | ||
6bb82612 | 633 | mutex_lock(&tpg->tpg_lun_mutex); |
c66ac9db | 634 | lun->lun_access = lun_access; |
6bb82612 NB |
635 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
636 | hlist_add_head_rcu(&lun->link, &tpg->tpg_lun_hlist); | |
637 | mutex_unlock(&tpg->tpg_lun_mutex); | |
c66ac9db NB |
638 | |
639 | return 0; | |
640 | } | |
641 | ||
cd9d7cba | 642 | void core_tpg_remove_lun( |
c66ac9db NB |
643 | struct se_portal_group *tpg, |
644 | struct se_lun *lun) | |
645 | { | |
6bb82612 NB |
646 | struct se_device *dev = lun->lun_se_dev; |
647 | ||
4a9a6c8d NB |
648 | core_clear_lun_from_tpg(lun, tpg); |
649 | transport_clear_lun_ref(lun); | |
c66ac9db NB |
650 | |
651 | core_dev_unexport(lun->lun_se_dev, tpg, lun); | |
652 | ||
6bb82612 | 653 | mutex_lock(&tpg->tpg_lun_mutex); |
6bb82612 NB |
654 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
655 | hlist_del_rcu(&lun->link); | |
656 | mutex_unlock(&tpg->tpg_lun_mutex); | |
c66ac9db | 657 | |
9a1049da | 658 | percpu_ref_exit(&lun->lun_ref); |
c66ac9db | 659 | } |