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Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_device.c (based on iscsi_target_device.c) | |
3 | * | |
e3d6f909 | 4 | * This file contains the TCM Virtual Device and Disk Transport |
c66ac9db NB |
5 | * agnostic related functions. |
6 | * | |
4c76251e | 7 | * (c) Copyright 2003-2013 Datera, Inc. |
c66ac9db NB |
8 | * |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
27 | #include <linux/net.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/timer.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/spinlock.h> | |
c66ac9db NB |
33 | #include <linux/kthread.h> |
34 | #include <linux/in.h> | |
c53181af | 35 | #include <linux/export.h> |
8dcf07be | 36 | #include <linux/t10-pi.h> |
7bfea53b | 37 | #include <asm/unaligned.h> |
c66ac9db NB |
38 | #include <net/sock.h> |
39 | #include <net/tcp.h> | |
ba929992 BVA |
40 | #include <scsi/scsi_common.h> |
41 | #include <scsi/scsi_proto.h> | |
c66ac9db NB |
42 | |
43 | #include <target/target_core_base.h> | |
c4795fb2 CH |
44 | #include <target/target_core_backend.h> |
45 | #include <target/target_core_fabric.h> | |
c66ac9db | 46 | |
e26d99ae | 47 | #include "target_core_internal.h" |
c66ac9db | 48 | #include "target_core_alua.h" |
c66ac9db NB |
49 | #include "target_core_pr.h" |
50 | #include "target_core_ua.h" | |
51 | ||
d9ea32bf NB |
52 | DEFINE_MUTEX(g_device_mutex); |
53 | LIST_HEAD(g_device_list); | |
54 | ||
e3d6f909 | 55 | static struct se_hba *lun0_hba; |
e3d6f909 AG |
56 | /* not static, needed by tpg.c */ |
57 | struct se_device *g_lun0_dev; | |
58 | ||
de103c93 | 59 | sense_reason_t |
f2d30680 | 60 | transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun) |
c66ac9db | 61 | { |
c66ac9db | 62 | struct se_lun *se_lun = NULL; |
e3d6f909 | 63 | struct se_session *se_sess = se_cmd->se_sess; |
29a05dee | 64 | struct se_node_acl *nacl = se_sess->se_node_acl; |
29a05dee | 65 | struct se_dev_entry *deve; |
8fa3a867 | 66 | sense_reason_t ret = TCM_NO_SENSE; |
5951146d | 67 | |
29a05dee NB |
68 | rcu_read_lock(); |
69 | deve = target_nacl_find_deve(nacl, unpacked_lun); | |
70 | if (deve) { | |
71 | atomic_long_inc(&deve->total_cmds); | |
5951146d | 72 | |
5951146d | 73 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
29a05dee NB |
74 | atomic_long_add(se_cmd->data_length, |
75 | &deve->write_bytes); | |
5951146d | 76 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
29a05dee NB |
77 | atomic_long_add(se_cmd->data_length, |
78 | &deve->read_bytes); | |
5951146d | 79 | |
29a05dee | 80 | se_lun = rcu_dereference(deve->se_lun); |
16a74480 NB |
81 | |
82 | if (!percpu_ref_tryget_live(&se_lun->lun_ref)) { | |
83 | se_lun = NULL; | |
84 | goto out_unlock; | |
85 | } | |
86 | ||
29a05dee | 87 | se_cmd->se_lun = rcu_dereference(deve->se_lun); |
c66ac9db NB |
88 | se_cmd->pr_res_key = deve->pr_res_key; |
89 | se_cmd->orig_fe_lun = unpacked_lun; | |
c66ac9db | 90 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
5277797d | 91 | se_cmd->lun_ref_active = true; |
8fa3a867 NB |
92 | |
93 | if ((se_cmd->data_direction == DMA_TO_DEVICE) && | |
03a68b44 | 94 | deve->lun_access_ro) { |
8fa3a867 NB |
95 | pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" |
96 | " Access for 0x%08llx\n", | |
97 | se_cmd->se_tfo->get_fabric_name(), | |
98 | unpacked_lun); | |
99 | rcu_read_unlock(); | |
100 | ret = TCM_WRITE_PROTECTED; | |
101 | goto ref_dev; | |
102 | } | |
c66ac9db | 103 | } |
16a74480 | 104 | out_unlock: |
29a05dee | 105 | rcu_read_unlock(); |
c66ac9db NB |
106 | |
107 | if (!se_lun) { | |
5951146d AG |
108 | /* |
109 | * Use the se_portal_group->tpg_virt_lun0 to allow for | |
110 | * REPORT_LUNS, et al to be returned when no active | |
111 | * MappedLUN=0 exists for this Initiator Port. | |
112 | */ | |
113 | if (unpacked_lun != 0) { | |
6708bb27 | 114 | pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
f2d30680 | 115 | " Access for 0x%08llx\n", |
e3d6f909 | 116 | se_cmd->se_tfo->get_fabric_name(), |
c66ac9db | 117 | unpacked_lun); |
de103c93 | 118 | return TCM_NON_EXISTENT_LUN; |
5951146d | 119 | } |
5951146d | 120 | |
adf653f9 CH |
121 | se_lun = se_sess->se_tpg->tpg_virt_lun0; |
122 | se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0; | |
5951146d | 123 | se_cmd->orig_fe_lun = 0; |
5951146d | 124 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
5277797d NB |
125 | |
126 | percpu_ref_get(&se_lun->lun_ref); | |
127 | se_cmd->lun_ref_active = true; | |
8fa3a867 NB |
128 | |
129 | /* | |
130 | * Force WRITE PROTECT for virtual LUN 0 | |
131 | */ | |
132 | if ((se_cmd->data_direction != DMA_FROM_DEVICE) && | |
133 | (se_cmd->data_direction != DMA_NONE)) { | |
134 | ret = TCM_WRITE_PROTECTED; | |
135 | goto ref_dev; | |
136 | } | |
c66ac9db | 137 | } |
4cc987ea NB |
138 | /* |
139 | * RCU reference protected by percpu se_lun->lun_ref taken above that | |
140 | * must drop to zero (including initial reference) before this se_lun | |
141 | * pointer can be kfree_rcu() by the final se_lun->lun_group put via | |
142 | * target_core_fabric_configfs.c:target_fabric_port_release | |
143 | */ | |
8fa3a867 | 144 | ref_dev: |
4cc987ea NB |
145 | se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); |
146 | atomic_long_inc(&se_cmd->se_dev->num_cmds); | |
c66ac9db | 147 | |
c66ac9db | 148 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
4cc987ea NB |
149 | atomic_long_add(se_cmd->data_length, |
150 | &se_cmd->se_dev->write_bytes); | |
c66ac9db | 151 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
4cc987ea NB |
152 | atomic_long_add(se_cmd->data_length, |
153 | &se_cmd->se_dev->read_bytes); | |
c66ac9db | 154 | |
8fa3a867 | 155 | return ret; |
c66ac9db | 156 | } |
5951146d | 157 | EXPORT_SYMBOL(transport_lookup_cmd_lun); |
c66ac9db | 158 | |
f2d30680 | 159 | int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) |
c66ac9db | 160 | { |
c66ac9db NB |
161 | struct se_dev_entry *deve; |
162 | struct se_lun *se_lun = NULL; | |
e3d6f909 | 163 | struct se_session *se_sess = se_cmd->se_sess; |
29a05dee | 164 | struct se_node_acl *nacl = se_sess->se_node_acl; |
c66ac9db | 165 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; |
5e1be919 | 166 | unsigned long flags; |
c66ac9db | 167 | |
29a05dee NB |
168 | rcu_read_lock(); |
169 | deve = target_nacl_find_deve(nacl, unpacked_lun); | |
170 | if (deve) { | |
171 | se_tmr->tmr_lun = rcu_dereference(deve->se_lun); | |
172 | se_cmd->se_lun = rcu_dereference(deve->se_lun); | |
173 | se_lun = rcu_dereference(deve->se_lun); | |
c66ac9db NB |
174 | se_cmd->pr_res_key = deve->pr_res_key; |
175 | se_cmd->orig_fe_lun = unpacked_lun; | |
c66ac9db | 176 | } |
29a05dee | 177 | rcu_read_unlock(); |
c66ac9db NB |
178 | |
179 | if (!se_lun) { | |
6708bb27 | 180 | pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
f2d30680 | 181 | " Access for 0x%08llx\n", |
e3d6f909 | 182 | se_cmd->se_tfo->get_fabric_name(), |
c66ac9db | 183 | unpacked_lun); |
e3d6f909 | 184 | return -ENODEV; |
c66ac9db | 185 | } |
4cc987ea NB |
186 | /* |
187 | * XXX: Add percpu se_lun->lun_ref reference count for TMR | |
188 | */ | |
189 | se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); | |
190 | se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev); | |
5951146d | 191 | |
5e1be919 | 192 | spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); |
5951146d | 193 | list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); |
5e1be919 | 194 | spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); |
c66ac9db NB |
195 | |
196 | return 0; | |
197 | } | |
5951146d | 198 | EXPORT_SYMBOL(transport_lookup_tmr_lun); |
c66ac9db | 199 | |
29a05dee NB |
200 | bool target_lun_is_rdonly(struct se_cmd *cmd) |
201 | { | |
202 | struct se_session *se_sess = cmd->se_sess; | |
203 | struct se_dev_entry *deve; | |
204 | bool ret; | |
205 | ||
29a05dee NB |
206 | rcu_read_lock(); |
207 | deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun); | |
03a68b44 | 208 | ret = deve && deve->lun_access_ro; |
29a05dee NB |
209 | rcu_read_unlock(); |
210 | ||
211 | return ret; | |
212 | } | |
213 | EXPORT_SYMBOL(target_lun_is_rdonly); | |
214 | ||
c66ac9db NB |
215 | /* |
216 | * This function is called from core_scsi3_emulate_pro_register_and_move() | |
29a05dee | 217 | * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref |
c66ac9db NB |
218 | * when a matching rtpi is found. |
219 | */ | |
220 | struct se_dev_entry *core_get_se_deve_from_rtpi( | |
221 | struct se_node_acl *nacl, | |
222 | u16 rtpi) | |
223 | { | |
224 | struct se_dev_entry *deve; | |
225 | struct se_lun *lun; | |
c66ac9db | 226 | struct se_portal_group *tpg = nacl->se_tpg; |
c66ac9db | 227 | |
29a05dee NB |
228 | rcu_read_lock(); |
229 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
230 | lun = rcu_dereference(deve->se_lun); | |
6708bb27 AG |
231 | if (!lun) { |
232 | pr_err("%s device entries device pointer is" | |
c66ac9db | 233 | " NULL, but Initiator has access.\n", |
e3d6f909 | 234 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
235 | continue; |
236 | } | |
29a05dee | 237 | if (lun->lun_rtpi != rtpi) |
c66ac9db NB |
238 | continue; |
239 | ||
29a05dee NB |
240 | kref_get(&deve->pr_kref); |
241 | rcu_read_unlock(); | |
c66ac9db NB |
242 | |
243 | return deve; | |
244 | } | |
29a05dee | 245 | rcu_read_unlock(); |
c66ac9db NB |
246 | |
247 | return NULL; | |
248 | } | |
249 | ||
29a05dee | 250 | void core_free_device_list_for_node( |
c66ac9db NB |
251 | struct se_node_acl *nacl, |
252 | struct se_portal_group *tpg) | |
253 | { | |
254 | struct se_dev_entry *deve; | |
c66ac9db | 255 | |
29a05dee NB |
256 | mutex_lock(&nacl->lun_entry_mutex); |
257 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
258 | struct se_lun *lun = rcu_dereference_check(deve->se_lun, | |
259 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
260 | core_disable_device_list_for_node(lun, deve, nacl, tpg); | |
c66ac9db | 261 | } |
29a05dee | 262 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db NB |
263 | } |
264 | ||
c66ac9db | 265 | void core_update_device_list_access( |
f2d30680 | 266 | u64 mapped_lun, |
03a68b44 | 267 | bool lun_access_ro, |
c66ac9db NB |
268 | struct se_node_acl *nacl) |
269 | { | |
270 | struct se_dev_entry *deve; | |
271 | ||
29a05dee NB |
272 | mutex_lock(&nacl->lun_entry_mutex); |
273 | deve = target_nacl_find_deve(nacl, mapped_lun); | |
03a68b44 AG |
274 | if (deve) |
275 | deve->lun_access_ro = lun_access_ro; | |
29a05dee | 276 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db NB |
277 | } |
278 | ||
29a05dee NB |
279 | /* |
280 | * Called with rcu_read_lock or nacl->device_list_lock held. | |
c66ac9db | 281 | */ |
f2d30680 | 282 | struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun) |
29a05dee NB |
283 | { |
284 | struct se_dev_entry *deve; | |
285 | ||
286 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) | |
287 | if (deve->mapped_lun == mapped_lun) | |
288 | return deve; | |
289 | ||
290 | return NULL; | |
291 | } | |
292 | EXPORT_SYMBOL(target_nacl_find_deve); | |
293 | ||
294 | void target_pr_kref_release(struct kref *kref) | |
295 | { | |
296 | struct se_dev_entry *deve = container_of(kref, struct se_dev_entry, | |
297 | pr_kref); | |
298 | complete(&deve->pr_comp); | |
c66ac9db NB |
299 | } |
300 | ||
7c0d0d51 HR |
301 | static void |
302 | target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new, | |
303 | bool skip_new) | |
304 | { | |
305 | struct se_dev_entry *tmp; | |
306 | ||
307 | rcu_read_lock(); | |
308 | hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) { | |
309 | if (skip_new && tmp == new) | |
310 | continue; | |
311 | core_scsi3_ua_allocate(tmp, 0x3F, | |
312 | ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED); | |
313 | } | |
314 | rcu_read_unlock(); | |
315 | } | |
316 | ||
e80ac6c4 | 317 | int core_enable_device_list_for_node( |
c66ac9db NB |
318 | struct se_lun *lun, |
319 | struct se_lun_acl *lun_acl, | |
f2d30680 | 320 | u64 mapped_lun, |
03a68b44 | 321 | bool lun_access_ro, |
c66ac9db | 322 | struct se_node_acl *nacl, |
e80ac6c4 | 323 | struct se_portal_group *tpg) |
c66ac9db | 324 | { |
29a05dee | 325 | struct se_dev_entry *orig, *new; |
c66ac9db | 326 | |
29a05dee NB |
327 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
328 | if (!new) { | |
329 | pr_err("Unable to allocate se_dev_entry memory\n"); | |
330 | return -ENOMEM; | |
331 | } | |
e80ac6c4 | 332 | |
29a05dee NB |
333 | atomic_set(&new->ua_count, 0); |
334 | spin_lock_init(&new->ua_lock); | |
29a05dee | 335 | INIT_LIST_HEAD(&new->ua_list); |
adf653f9 | 336 | INIT_LIST_HEAD(&new->lun_link); |
e80ac6c4 | 337 | |
29a05dee NB |
338 | new->mapped_lun = mapped_lun; |
339 | kref_init(&new->pr_kref); | |
340 | init_completion(&new->pr_comp); | |
341 | ||
03a68b44 | 342 | new->lun_access_ro = lun_access_ro; |
29a05dee NB |
343 | new->creation_time = get_jiffies_64(); |
344 | new->attach_count++; | |
345 | ||
346 | mutex_lock(&nacl->lun_entry_mutex); | |
347 | orig = target_nacl_find_deve(nacl, mapped_lun); | |
348 | if (orig && orig->se_lun) { | |
349 | struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun, | |
350 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
351 | ||
352 | if (orig_lun != lun) { | |
353 | pr_err("Existing orig->se_lun doesn't match new lun" | |
354 | " for dynamic -> explicit NodeACL conversion:" | |
355 | " %s\n", nacl->initiatorname); | |
356 | mutex_unlock(&nacl->lun_entry_mutex); | |
357 | kfree(new); | |
e80ac6c4 | 358 | return -EINVAL; |
c66ac9db | 359 | } |
391e2a6d NB |
360 | if (orig->se_lun_acl != NULL) { |
361 | pr_warn_ratelimited("Detected existing explicit" | |
362 | " se_lun_acl->se_lun_group reference for %s" | |
363 | " mapped_lun: %llu, failing\n", | |
364 | nacl->initiatorname, mapped_lun); | |
365 | mutex_unlock(&nacl->lun_entry_mutex); | |
366 | kfree(new); | |
367 | return -EINVAL; | |
368 | } | |
c66ac9db | 369 | |
29a05dee NB |
370 | rcu_assign_pointer(new->se_lun, lun); |
371 | rcu_assign_pointer(new->se_lun_acl, lun_acl); | |
372 | hlist_del_rcu(&orig->link); | |
373 | hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); | |
374 | mutex_unlock(&nacl->lun_entry_mutex); | |
c66ac9db | 375 | |
1adff1b3 | 376 | spin_lock(&lun->lun_deve_lock); |
adf653f9 CH |
377 | list_del(&orig->lun_link); |
378 | list_add_tail(&new->lun_link, &lun->lun_deve_list); | |
1adff1b3 | 379 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db | 380 | |
29a05dee NB |
381 | kref_put(&orig->pr_kref, target_pr_kref_release); |
382 | wait_for_completion(&orig->pr_comp); | |
c66ac9db | 383 | |
7c0d0d51 | 384 | target_luns_data_has_changed(nacl, new, true); |
29a05dee NB |
385 | kfree_rcu(orig, rcu_head); |
386 | return 0; | |
c66ac9db | 387 | } |
e80ac6c4 | 388 | |
29a05dee NB |
389 | rcu_assign_pointer(new->se_lun, lun); |
390 | rcu_assign_pointer(new->se_lun_acl, lun_acl); | |
391 | hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); | |
392 | mutex_unlock(&nacl->lun_entry_mutex); | |
e80ac6c4 | 393 | |
1adff1b3 | 394 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 395 | list_add_tail(&new->lun_link, &lun->lun_deve_list); |
1adff1b3 | 396 | spin_unlock(&lun->lun_deve_lock); |
e80ac6c4 | 397 | |
7c0d0d51 | 398 | target_luns_data_has_changed(nacl, new, true); |
e80ac6c4 AG |
399 | return 0; |
400 | } | |
401 | ||
29a05dee NB |
402 | /* |
403 | * Called with se_node_acl->lun_entry_mutex held. | |
e80ac6c4 | 404 | */ |
29a05dee | 405 | void core_disable_device_list_for_node( |
e80ac6c4 | 406 | struct se_lun *lun, |
29a05dee | 407 | struct se_dev_entry *orig, |
e80ac6c4 AG |
408 | struct se_node_acl *nacl, |
409 | struct se_portal_group *tpg) | |
410 | { | |
4cc987ea NB |
411 | /* |
412 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
413 | * reference to se_device->dev_group. | |
414 | */ | |
415 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
e80ac6c4 AG |
416 | /* |
417 | * If the MappedLUN entry is being disabled, the entry in | |
adf653f9 | 418 | * lun->lun_deve_list must be removed now before clearing the |
e80ac6c4 AG |
419 | * struct se_dev_entry pointers below as logic in |
420 | * core_alua_do_transition_tg_pt() depends on these being present. | |
421 | * | |
422 | * deve->se_lun_acl will be NULL for demo-mode created LUNs | |
423 | * that have not been explicitly converted to MappedLUNs -> | |
adf653f9 CH |
424 | * struct se_lun_acl, but we remove deve->lun_link from |
425 | * lun->lun_deve_list. This also means that active UAs and | |
e80ac6c4 AG |
426 | * NodeACL context specific PR metadata for demo-mode |
427 | * MappedLUN *deve will be released below.. | |
428 | */ | |
1adff1b3 | 429 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 430 | list_del(&orig->lun_link); |
1adff1b3 | 431 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db | 432 | /* |
29a05dee | 433 | * Disable struct se_dev_entry LUN ACL mapping |
c66ac9db | 434 | */ |
29a05dee NB |
435 | core_scsi3_ua_release_all(orig); |
436 | ||
437 | hlist_del_rcu(&orig->link); | |
80bfdfa9 | 438 | clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags); |
03a68b44 | 439 | orig->lun_access_ro = false; |
29a05dee NB |
440 | orig->creation_time = 0; |
441 | orig->attach_count--; | |
c66ac9db | 442 | /* |
29a05dee NB |
443 | * Before firing off RCU callback, wait for any in process SPEC_I_PT=1 |
444 | * or REGISTER_AND_MOVE PR operation to complete. | |
c66ac9db | 445 | */ |
29a05dee NB |
446 | kref_put(&orig->pr_kref, target_pr_kref_release); |
447 | wait_for_completion(&orig->pr_comp); | |
448 | ||
3ccd6e83 NB |
449 | rcu_assign_pointer(orig->se_lun, NULL); |
450 | rcu_assign_pointer(orig->se_lun_acl, NULL); | |
451 | ||
29a05dee | 452 | kfree_rcu(orig, rcu_head); |
c66ac9db | 453 | |
4cc987ea | 454 | core_scsi3_free_pr_reg_from_nacl(dev, nacl); |
7c0d0d51 | 455 | target_luns_data_has_changed(nacl, NULL, false); |
c66ac9db NB |
456 | } |
457 | ||
458 | /* core_clear_lun_from_tpg(): | |
459 | * | |
460 | * | |
461 | */ | |
462 | void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) | |
463 | { | |
464 | struct se_node_acl *nacl; | |
465 | struct se_dev_entry *deve; | |
c66ac9db | 466 | |
403edd78 | 467 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 468 | list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { |
c66ac9db | 469 | |
29a05dee NB |
470 | mutex_lock(&nacl->lun_entry_mutex); |
471 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
472 | struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun, | |
473 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
c66ac9db | 474 | |
29a05dee NB |
475 | if (lun != tmp_lun) |
476 | continue; | |
c66ac9db | 477 | |
29a05dee | 478 | core_disable_device_list_for_node(lun, deve, nacl, tpg); |
c66ac9db | 479 | } |
29a05dee | 480 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db | 481 | } |
403edd78 | 482 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
483 | } |
484 | ||
adf653f9 | 485 | int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev) |
c66ac9db | 486 | { |
adf653f9 | 487 | struct se_lun *tmp; |
c66ac9db NB |
488 | |
489 | spin_lock(&dev->se_port_lock); | |
adf653f9 | 490 | if (dev->export_count == 0x0000ffff) { |
6708bb27 | 491 | pr_warn("Reached dev->dev_port_count ==" |
c66ac9db NB |
492 | " 0x0000ffff\n"); |
493 | spin_unlock(&dev->se_port_lock); | |
adf653f9 | 494 | return -ENOSPC; |
c66ac9db NB |
495 | } |
496 | again: | |
497 | /* | |
35d1efe8 | 498 | * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device |
c66ac9db NB |
499 | * Here is the table from spc4r17 section 7.7.3.8. |
500 | * | |
501 | * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field | |
502 | * | |
503 | * Code Description | |
504 | * 0h Reserved | |
505 | * 1h Relative port 1, historically known as port A | |
506 | * 2h Relative port 2, historically known as port B | |
507 | * 3h to FFFFh Relative port 3 through 65 535 | |
508 | */ | |
adf653f9 CH |
509 | lun->lun_rtpi = dev->dev_rpti_counter++; |
510 | if (!lun->lun_rtpi) | |
c66ac9db NB |
511 | goto again; |
512 | ||
adf653f9 | 513 | list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) { |
c66ac9db | 514 | /* |
35d1efe8 | 515 | * Make sure RELATIVE TARGET PORT IDENTIFIER is unique |
c66ac9db NB |
516 | * for 16-bit wrap.. |
517 | */ | |
adf653f9 | 518 | if (lun->lun_rtpi == tmp->lun_rtpi) |
c66ac9db NB |
519 | goto again; |
520 | } | |
521 | spin_unlock(&dev->se_port_lock); | |
522 | ||
c66ac9db NB |
523 | return 0; |
524 | } | |
525 | ||
0fd97ccf | 526 | static void se_release_vpd_for_dev(struct se_device *dev) |
c66ac9db NB |
527 | { |
528 | struct t10_vpd *vpd, *vpd_tmp; | |
529 | ||
0fd97ccf | 530 | spin_lock(&dev->t10_wwn.t10_vpd_lock); |
c66ac9db | 531 | list_for_each_entry_safe(vpd, vpd_tmp, |
0fd97ccf | 532 | &dev->t10_wwn.t10_vpd_list, vpd_list) { |
c66ac9db NB |
533 | list_del(&vpd->vpd_list); |
534 | kfree(vpd); | |
535 | } | |
0fd97ccf | 536 | spin_unlock(&dev->t10_wwn.t10_vpd_lock); |
c66ac9db NB |
537 | } |
538 | ||
c8045372 | 539 | static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) |
525a48a2 | 540 | { |
3e03989b RD |
541 | u32 aligned_max_sectors; |
542 | u32 alignment; | |
525a48a2 NB |
543 | /* |
544 | * Limit max_sectors to a PAGE_SIZE aligned value for modern | |
545 | * transport_allocate_data_tasks() operation. | |
546 | */ | |
3e03989b RD |
547 | alignment = max(1ul, PAGE_SIZE / block_size); |
548 | aligned_max_sectors = rounddown(max_sectors, alignment); | |
549 | ||
550 | if (max_sectors != aligned_max_sectors) | |
551 | pr_info("Rounding down aligned max_sectors from %u to %u\n", | |
552 | max_sectors, aligned_max_sectors); | |
525a48a2 | 553 | |
3e03989b | 554 | return aligned_max_sectors; |
525a48a2 NB |
555 | } |
556 | ||
6bb82612 | 557 | int core_dev_add_lun( |
c66ac9db | 558 | struct se_portal_group *tpg, |
c66ac9db | 559 | struct se_device *dev, |
6bb82612 | 560 | struct se_lun *lun) |
c66ac9db | 561 | { |
8d9efe53 | 562 | int rc; |
c66ac9db | 563 | |
03a68b44 | 564 | rc = core_tpg_add_lun(tpg, lun, false, dev); |
8d9efe53 | 565 | if (rc < 0) |
6bb82612 | 566 | return rc; |
c66ac9db | 567 | |
f2d30680 | 568 | pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from" |
e3d6f909 | 569 | " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), |
2af7973a | 570 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
2dca673b | 571 | tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); |
c66ac9db NB |
572 | /* |
573 | * Update LUN maps for dynamically added initiators when | |
574 | * generate_node_acl is enabled. | |
575 | */ | |
e3d6f909 | 576 | if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { |
c66ac9db | 577 | struct se_node_acl *acl; |
403edd78 NB |
578 | |
579 | mutex_lock(&tpg->acl_node_mutex); | |
c66ac9db | 580 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
052605c6 NB |
581 | if (acl->dynamic_node_acl && |
582 | (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || | |
583 | !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { | |
df9766ca | 584 | core_tpg_add_node_to_devs(acl, tpg, lun); |
c66ac9db NB |
585 | } |
586 | } | |
403edd78 | 587 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
588 | } |
589 | ||
6bb82612 | 590 | return 0; |
c66ac9db NB |
591 | } |
592 | ||
593 | /* core_dev_del_lun(): | |
594 | * | |
595 | * | |
596 | */ | |
cd9d7cba | 597 | void core_dev_del_lun( |
c66ac9db | 598 | struct se_portal_group *tpg, |
cd9d7cba | 599 | struct se_lun *lun) |
c66ac9db | 600 | { |
f2d30680 | 601 | pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from" |
e3d6f909 | 602 | " device object\n", tpg->se_tpg_tfo->get_fabric_name(), |
cd9d7cba | 603 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
e3d6f909 | 604 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db | 605 | |
cd9d7cba | 606 | core_tpg_remove_lun(tpg, lun); |
c66ac9db NB |
607 | } |
608 | ||
c66ac9db NB |
609 | struct se_lun_acl *core_dev_init_initiator_node_lun_acl( |
610 | struct se_portal_group *tpg, | |
fcf29481 | 611 | struct se_node_acl *nacl, |
f2d30680 | 612 | u64 mapped_lun, |
c66ac9db NB |
613 | int *ret) |
614 | { | |
615 | struct se_lun_acl *lacl; | |
c66ac9db | 616 | |
fcf29481 | 617 | if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { |
6708bb27 | 618 | pr_err("%s InitiatorName exceeds maximum size.\n", |
e3d6f909 | 619 | tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
620 | *ret = -EOVERFLOW; |
621 | return NULL; | |
622 | } | |
c66ac9db | 623 | lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); |
6708bb27 AG |
624 | if (!lacl) { |
625 | pr_err("Unable to allocate memory for struct se_lun_acl.\n"); | |
c66ac9db NB |
626 | *ret = -ENOMEM; |
627 | return NULL; | |
628 | } | |
629 | ||
c66ac9db NB |
630 | lacl->mapped_lun = mapped_lun; |
631 | lacl->se_lun_nacl = nacl; | |
c66ac9db NB |
632 | |
633 | return lacl; | |
634 | } | |
635 | ||
636 | int core_dev_add_initiator_node_lun_acl( | |
637 | struct se_portal_group *tpg, | |
638 | struct se_lun_acl *lacl, | |
6bb82612 | 639 | struct se_lun *lun, |
03a68b44 | 640 | bool lun_access_ro) |
c66ac9db | 641 | { |
6bb82612 | 642 | struct se_node_acl *nacl = lacl->se_lun_nacl; |
4cc987ea NB |
643 | /* |
644 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
645 | * reference to se_device->dev_group. | |
646 | */ | |
647 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 648 | |
6708bb27 | 649 | if (!nacl) |
c66ac9db NB |
650 | return -EINVAL; |
651 | ||
03a68b44 AG |
652 | if (lun->lun_access_ro) |
653 | lun_access_ro = true; | |
c66ac9db NB |
654 | |
655 | lacl->se_lun = lun; | |
656 | ||
e80ac6c4 | 657 | if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, |
03a68b44 | 658 | lun_access_ro, nacl, tpg) < 0) |
c66ac9db NB |
659 | return -EINVAL; |
660 | ||
f2d30680 | 661 | pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for " |
e3d6f909 | 662 | " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
6bb82612 | 663 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun, |
03a68b44 | 664 | lun_access_ro ? "RO" : "RW", |
b6a54b8d | 665 | nacl->initiatorname); |
c66ac9db NB |
666 | /* |
667 | * Check to see if there are any existing persistent reservation APTPL | |
668 | * pre-registrations that need to be enabled for this LUN ACL.. | |
669 | */ | |
4cc987ea | 670 | core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl, |
e2480563 | 671 | lacl->mapped_lun); |
c66ac9db NB |
672 | return 0; |
673 | } | |
674 | ||
c66ac9db | 675 | int core_dev_del_initiator_node_lun_acl( |
c66ac9db NB |
676 | struct se_lun *lun, |
677 | struct se_lun_acl *lacl) | |
678 | { | |
adf653f9 | 679 | struct se_portal_group *tpg = lun->lun_tpg; |
c66ac9db | 680 | struct se_node_acl *nacl; |
29a05dee | 681 | struct se_dev_entry *deve; |
c66ac9db NB |
682 | |
683 | nacl = lacl->se_lun_nacl; | |
6708bb27 | 684 | if (!nacl) |
c66ac9db NB |
685 | return -EINVAL; |
686 | ||
29a05dee NB |
687 | mutex_lock(&nacl->lun_entry_mutex); |
688 | deve = target_nacl_find_deve(nacl, lacl->mapped_lun); | |
689 | if (deve) | |
690 | core_disable_device_list_for_node(lun, deve, nacl, tpg); | |
691 | mutex_unlock(&nacl->lun_entry_mutex); | |
c66ac9db | 692 | |
f2d30680 HR |
693 | pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for" |
694 | " InitiatorNode: %s Mapped LUN: %llu\n", | |
e3d6f909 AG |
695 | tpg->se_tpg_tfo->get_fabric_name(), |
696 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, | |
b6a54b8d | 697 | nacl->initiatorname, lacl->mapped_lun); |
c66ac9db NB |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
702 | void core_dev_free_initiator_node_lun_acl( | |
703 | struct se_portal_group *tpg, | |
704 | struct se_lun_acl *lacl) | |
705 | { | |
6708bb27 | 706 | pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" |
f2d30680 | 707 | " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(), |
e3d6f909 AG |
708 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
709 | tpg->se_tpg_tfo->get_fabric_name(), | |
b6a54b8d | 710 | lacl->se_lun_nacl->initiatorname, lacl->mapped_lun); |
c66ac9db NB |
711 | |
712 | kfree(lacl); | |
713 | } | |
714 | ||
0fd97ccf CH |
715 | static void scsi_dump_inquiry(struct se_device *dev) |
716 | { | |
717 | struct t10_wwn *wwn = &dev->t10_wwn; | |
718 | char buf[17]; | |
719 | int i, device_type; | |
720 | /* | |
721 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
722 | */ | |
723 | for (i = 0; i < 8; i++) | |
724 | if (wwn->vendor[i] >= 0x20) | |
725 | buf[i] = wwn->vendor[i]; | |
726 | else | |
727 | buf[i] = ' '; | |
728 | buf[i] = '\0'; | |
729 | pr_debug(" Vendor: %s\n", buf); | |
730 | ||
731 | for (i = 0; i < 16; i++) | |
732 | if (wwn->model[i] >= 0x20) | |
733 | buf[i] = wwn->model[i]; | |
734 | else | |
735 | buf[i] = ' '; | |
736 | buf[i] = '\0'; | |
737 | pr_debug(" Model: %s\n", buf); | |
738 | ||
739 | for (i = 0; i < 4; i++) | |
740 | if (wwn->revision[i] >= 0x20) | |
741 | buf[i] = wwn->revision[i]; | |
742 | else | |
743 | buf[i] = ' '; | |
744 | buf[i] = '\0'; | |
745 | pr_debug(" Revision: %s\n", buf); | |
746 | ||
747 | device_type = dev->transport->get_device_type(dev); | |
748 | pr_debug(" Type: %s ", scsi_device_type(device_type)); | |
0fd97ccf CH |
749 | } |
750 | ||
751 | struct se_device *target_alloc_device(struct se_hba *hba, const char *name) | |
752 | { | |
753 | struct se_device *dev; | |
4863e525 | 754 | struct se_lun *xcopy_lun; |
0fd97ccf | 755 | |
0a06d430 | 756 | dev = hba->backend->ops->alloc_device(hba, name); |
0fd97ccf CH |
757 | if (!dev) |
758 | return NULL; | |
759 | ||
0ff87549 | 760 | dev->dev_link_magic = SE_DEV_LINK_MAGIC; |
0fd97ccf | 761 | dev->se_hba = hba; |
0a06d430 | 762 | dev->transport = hba->backend->ops; |
fe052a18 | 763 | dev->prot_length = sizeof(struct t10_pi_tuple); |
4cc987ea | 764 | dev->hba_index = hba->hba_index; |
0fd97ccf CH |
765 | |
766 | INIT_LIST_HEAD(&dev->dev_list); | |
767 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
768 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
769 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
770 | INIT_LIST_HEAD(&dev->state_list); | |
771 | INIT_LIST_HEAD(&dev->qf_cmd_list); | |
d9ea32bf | 772 | INIT_LIST_HEAD(&dev->g_dev_node); |
0fd97ccf CH |
773 | spin_lock_init(&dev->execute_task_lock); |
774 | spin_lock_init(&dev->delayed_cmd_lock); | |
775 | spin_lock_init(&dev->dev_reservation_lock); | |
776 | spin_lock_init(&dev->se_port_lock); | |
777 | spin_lock_init(&dev->se_tmr_lock); | |
778 | spin_lock_init(&dev->qf_cmd_lock); | |
68ff9b9b | 779 | sema_init(&dev->caw_sem, 1); |
0fd97ccf CH |
780 | INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); |
781 | spin_lock_init(&dev->t10_wwn.t10_vpd_lock); | |
782 | INIT_LIST_HEAD(&dev->t10_pr.registration_list); | |
783 | INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); | |
784 | spin_lock_init(&dev->t10_pr.registration_lock); | |
785 | spin_lock_init(&dev->t10_pr.aptpl_reg_lock); | |
786 | INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); | |
787 | spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); | |
c66094bf HR |
788 | INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); |
789 | spin_lock_init(&dev->t10_alua.lba_map_lock); | |
0fd97ccf | 790 | |
0fd97ccf CH |
791 | dev->t10_wwn.t10_dev = dev; |
792 | dev->t10_alua.t10_dev = dev; | |
793 | ||
794 | dev->dev_attrib.da_dev = dev; | |
adfa9570 | 795 | dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; |
814e5b45 CH |
796 | dev->dev_attrib.emulate_dpo = 1; |
797 | dev->dev_attrib.emulate_fua_write = 1; | |
798 | dev->dev_attrib.emulate_fua_read = 1; | |
0fd97ccf CH |
799 | dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; |
800 | dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; | |
801 | dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; | |
802 | dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; | |
803 | dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; | |
0123a9ec | 804 | dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; |
d397a445 | 805 | dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; |
2ed22c9c | 806 | dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; |
0fd97ccf | 807 | dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; |
92404e60 | 808 | dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; |
0fd97ccf CH |
809 | dev->dev_attrib.is_nonrot = DA_IS_NONROT; |
810 | dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; | |
811 | dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; | |
812 | dev->dev_attrib.max_unmap_block_desc_count = | |
813 | DA_MAX_UNMAP_BLOCK_DESC_COUNT; | |
814 | dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; | |
815 | dev->dev_attrib.unmap_granularity_alignment = | |
816 | DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; | |
e6f41633 JP |
817 | dev->dev_attrib.unmap_zeroes_data = |
818 | DA_UNMAP_ZEROES_DATA_DEFAULT; | |
773cbaf7 | 819 | dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; |
0fd97ccf | 820 | |
4863e525 | 821 | xcopy_lun = &dev->xcopy_lun; |
4cc987ea | 822 | rcu_assign_pointer(xcopy_lun->lun_se_dev, dev); |
4863e525 | 823 | init_completion(&xcopy_lun->lun_ref_comp); |
16a74480 | 824 | init_completion(&xcopy_lun->lun_shutdown_comp); |
adf653f9 CH |
825 | INIT_LIST_HEAD(&xcopy_lun->lun_deve_list); |
826 | INIT_LIST_HEAD(&xcopy_lun->lun_dev_link); | |
827 | mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); | |
828 | xcopy_lun->lun_tpg = &xcopy_pt_tpg; | |
4863e525 | 829 | |
0fd97ccf CH |
830 | return dev; |
831 | } | |
832 | ||
8a9ebe71 MC |
833 | /* |
834 | * Check if the underlying struct block_device request_queue supports | |
835 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM | |
836 | * in ATA and we need to set TPE=1 | |
837 | */ | |
838 | bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, | |
ea263c7f | 839 | struct request_queue *q) |
8a9ebe71 | 840 | { |
ea263c7f MC |
841 | int block_size = queue_logical_block_size(q); |
842 | ||
8a9ebe71 MC |
843 | if (!blk_queue_discard(q)) |
844 | return false; | |
845 | ||
ea263c7f MC |
846 | attrib->max_unmap_lba_count = |
847 | q->limits.max_discard_sectors >> (ilog2(block_size) - 9); | |
8a9ebe71 MC |
848 | /* |
849 | * Currently hardcoded to 1 in Linux/SCSI code.. | |
850 | */ | |
851 | attrib->max_unmap_block_desc_count = 1; | |
852 | attrib->unmap_granularity = q->limits.discard_granularity / block_size; | |
853 | attrib->unmap_granularity_alignment = q->limits.discard_alignment / | |
854 | block_size; | |
855 | attrib->unmap_zeroes_data = q->limits.discard_zeroes_data; | |
856 | return true; | |
857 | } | |
858 | EXPORT_SYMBOL(target_configure_unmap_from_queue); | |
859 | ||
860 | /* | |
861 | * Convert from blocksize advertised to the initiator to the 512 byte | |
862 | * units unconditionally used by the Linux block layer. | |
863 | */ | |
864 | sector_t target_to_linux_sector(struct se_device *dev, sector_t lb) | |
865 | { | |
866 | switch (dev->dev_attrib.block_size) { | |
867 | case 4096: | |
868 | return lb << 3; | |
869 | case 2048: | |
870 | return lb << 2; | |
871 | case 1024: | |
872 | return lb << 1; | |
873 | default: | |
874 | return lb; | |
875 | } | |
876 | } | |
877 | EXPORT_SYMBOL(target_to_linux_sector); | |
878 | ||
0fd97ccf CH |
879 | int target_configure_device(struct se_device *dev) |
880 | { | |
881 | struct se_hba *hba = dev->se_hba; | |
882 | int ret; | |
883 | ||
884 | if (dev->dev_flags & DF_CONFIGURED) { | |
885 | pr_err("se_dev->se_dev_ptr already set for storage" | |
886 | " object\n"); | |
887 | return -EEXIST; | |
888 | } | |
889 | ||
890 | ret = dev->transport->configure_device(dev); | |
891 | if (ret) | |
892 | goto out; | |
0fd97ccf CH |
893 | /* |
894 | * XXX: there is not much point to have two different values here.. | |
895 | */ | |
896 | dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; | |
897 | dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; | |
898 | ||
899 | /* | |
900 | * Align max_hw_sectors down to PAGE_SIZE I/O transfers | |
901 | */ | |
902 | dev->dev_attrib.hw_max_sectors = | |
903 | se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, | |
904 | dev->dev_attrib.hw_block_size); | |
046ba642 | 905 | dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; |
0fd97ccf CH |
906 | |
907 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
908 | dev->creation_time = get_jiffies_64(); | |
909 | ||
0fd97ccf CH |
910 | ret = core_setup_alua(dev); |
911 | if (ret) | |
912 | goto out; | |
913 | ||
914 | /* | |
915 | * Startup the struct se_device processing thread | |
916 | */ | |
917 | dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, | |
918 | dev->transport->name); | |
919 | if (!dev->tmr_wq) { | |
920 | pr_err("Unable to create tmr workqueue for %s\n", | |
921 | dev->transport->name); | |
922 | ret = -ENOMEM; | |
923 | goto out_free_alua; | |
924 | } | |
925 | ||
926 | /* | |
927 | * Setup work_queue for QUEUE_FULL | |
928 | */ | |
929 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
930 | ||
931 | /* | |
932 | * Preload the initial INQUIRY const values if we are doing | |
933 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
934 | * passthrough because this is being provided by the backend LLD. | |
935 | */ | |
a3541703 | 936 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { |
0fd97ccf CH |
937 | strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
938 | strncpy(&dev->t10_wwn.model[0], | |
939 | dev->transport->inquiry_prod, 16); | |
940 | strncpy(&dev->t10_wwn.revision[0], | |
941 | dev->transport->inquiry_rev, 4); | |
942 | } | |
943 | ||
944 | scsi_dump_inquiry(dev); | |
945 | ||
946 | spin_lock(&hba->device_lock); | |
947 | hba->dev_count++; | |
948 | spin_unlock(&hba->device_lock); | |
d9ea32bf NB |
949 | |
950 | mutex_lock(&g_device_mutex); | |
951 | list_add_tail(&dev->g_dev_node, &g_device_list); | |
952 | mutex_unlock(&g_device_mutex); | |
953 | ||
5f7da044 NB |
954 | dev->dev_flags |= DF_CONFIGURED; |
955 | ||
0fd97ccf CH |
956 | return 0; |
957 | ||
958 | out_free_alua: | |
959 | core_alua_free_lu_gp_mem(dev); | |
960 | out: | |
961 | se_release_vpd_for_dev(dev); | |
962 | return ret; | |
963 | } | |
964 | ||
965 | void target_free_device(struct se_device *dev) | |
966 | { | |
967 | struct se_hba *hba = dev->se_hba; | |
968 | ||
969 | WARN_ON(!list_empty(&dev->dev_sep_list)); | |
970 | ||
971 | if (dev->dev_flags & DF_CONFIGURED) { | |
972 | destroy_workqueue(dev->tmr_wq); | |
973 | ||
d9ea32bf NB |
974 | mutex_lock(&g_device_mutex); |
975 | list_del(&dev->g_dev_node); | |
976 | mutex_unlock(&g_device_mutex); | |
977 | ||
0fd97ccf CH |
978 | spin_lock(&hba->device_lock); |
979 | hba->dev_count--; | |
980 | spin_unlock(&hba->device_lock); | |
981 | } | |
982 | ||
983 | core_alua_free_lu_gp_mem(dev); | |
229d4f11 | 984 | core_alua_set_lba_map(dev, NULL, 0, 0); |
0fd97ccf CH |
985 | core_scsi3_free_all_registrations(dev); |
986 | se_release_vpd_for_dev(dev); | |
987 | ||
2ed22c9c NB |
988 | if (dev->transport->free_prot) |
989 | dev->transport->free_prot(dev); | |
990 | ||
0fd97ccf CH |
991 | dev->transport->free_device(dev); |
992 | } | |
993 | ||
c66ac9db NB |
994 | int core_dev_setup_virtual_lun0(void) |
995 | { | |
996 | struct se_hba *hba; | |
997 | struct se_device *dev; | |
db5d1c3c | 998 | char buf[] = "rd_pages=8,rd_nullio=1"; |
c66ac9db NB |
999 | int ret; |
1000 | ||
6708bb27 | 1001 | hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); |
c66ac9db NB |
1002 | if (IS_ERR(hba)) |
1003 | return PTR_ERR(hba); | |
1004 | ||
0fd97ccf CH |
1005 | dev = target_alloc_device(hba, "virt_lun0"); |
1006 | if (!dev) { | |
c66ac9db | 1007 | ret = -ENOMEM; |
0fd97ccf | 1008 | goto out_free_hba; |
c66ac9db | 1009 | } |
c66ac9db | 1010 | |
0a06d430 | 1011 | hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf)); |
c66ac9db | 1012 | |
0fd97ccf CH |
1013 | ret = target_configure_device(dev); |
1014 | if (ret) | |
1015 | goto out_free_se_dev; | |
c66ac9db | 1016 | |
0fd97ccf CH |
1017 | lun0_hba = hba; |
1018 | g_lun0_dev = dev; | |
c66ac9db | 1019 | return 0; |
0fd97ccf CH |
1020 | |
1021 | out_free_se_dev: | |
1022 | target_free_device(dev); | |
1023 | out_free_hba: | |
1024 | core_delete_hba(hba); | |
c66ac9db NB |
1025 | return ret; |
1026 | } | |
1027 | ||
1028 | ||
1029 | void core_dev_release_virtual_lun0(void) | |
1030 | { | |
e3d6f909 | 1031 | struct se_hba *hba = lun0_hba; |
c66ac9db | 1032 | |
6708bb27 | 1033 | if (!hba) |
c66ac9db NB |
1034 | return; |
1035 | ||
e3d6f909 | 1036 | if (g_lun0_dev) |
0fd97ccf | 1037 | target_free_device(g_lun0_dev); |
c66ac9db NB |
1038 | core_delete_hba(hba); |
1039 | } | |
7bfea53b AG |
1040 | |
1041 | /* | |
1042 | * Common CDB parsing for kernel and user passthrough. | |
1043 | */ | |
1044 | sense_reason_t | |
1045 | passthrough_parse_cdb(struct se_cmd *cmd, | |
1046 | sense_reason_t (*exec_cmd)(struct se_cmd *cmd)) | |
1047 | { | |
1048 | unsigned char *cdb = cmd->t_task_cdb; | |
1049 | ||
1050 | /* | |
1051 | * Clear a lun set in the cdb if the initiator talking to use spoke | |
1052 | * and old standards version, as we can't assume the underlying device | |
1053 | * won't choke up on it. | |
1054 | */ | |
1055 | switch (cdb[0]) { | |
1056 | case READ_10: /* SBC - RDProtect */ | |
1057 | case READ_12: /* SBC - RDProtect */ | |
1058 | case READ_16: /* SBC - RDProtect */ | |
1059 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1060 | case VERIFY: /* SBC - VRProtect */ | |
1061 | case VERIFY_16: /* SBC - VRProtect */ | |
1062 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1063 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1064 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ | |
1065 | break; | |
1066 | default: | |
1067 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | /* | |
1072 | * For REPORT LUNS we always need to emulate the response, for everything | |
1073 | * else, pass it up. | |
1074 | */ | |
1075 | if (cdb[0] == REPORT_LUNS) { | |
1076 | cmd->execute_cmd = spc_emulate_report_luns; | |
1077 | return TCM_NO_SENSE; | |
1078 | } | |
1079 | ||
1080 | /* Set DATA_CDB flag for ops that should have it */ | |
1081 | switch (cdb[0]) { | |
1082 | case READ_6: | |
1083 | case READ_10: | |
1084 | case READ_12: | |
1085 | case READ_16: | |
1086 | case WRITE_6: | |
1087 | case WRITE_10: | |
1088 | case WRITE_12: | |
1089 | case WRITE_16: | |
1090 | case WRITE_VERIFY: | |
1091 | case WRITE_VERIFY_12: | |
1092 | case 0x8e: /* WRITE_VERIFY_16 */ | |
1093 | case COMPARE_AND_WRITE: | |
1094 | case XDWRITEREAD_10: | |
1095 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1096 | break; | |
1097 | case VARIABLE_LENGTH_CMD: | |
1098 | switch (get_unaligned_be16(&cdb[8])) { | |
1099 | case READ_32: | |
1100 | case WRITE_32: | |
1101 | case 0x0c: /* WRITE_VERIFY_32 */ | |
1102 | case XDWRITEREAD_32: | |
1103 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | cmd->execute_cmd = exec_cmd; | |
1109 | ||
1110 | return TCM_NO_SENSE; | |
1111 | } | |
1112 | EXPORT_SYMBOL(passthrough_parse_cdb); |