Commit | Line | Data |
---|---|---|
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 | ||
c82ff239 CIK |
52 | static DEFINE_MUTEX(device_mutex); |
53 | static LIST_HEAD(device_list); | |
0a5eee64 | 54 | static DEFINE_IDR(devices_idr); |
d9ea32bf | 55 | |
e3d6f909 | 56 | static struct se_hba *lun0_hba; |
e3d6f909 AG |
57 | /* not static, needed by tpg.c */ |
58 | struct se_device *g_lun0_dev; | |
59 | ||
de103c93 | 60 | sense_reason_t |
f2d30680 | 61 | transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun) |
c66ac9db | 62 | { |
c66ac9db | 63 | struct se_lun *se_lun = NULL; |
e3d6f909 | 64 | struct se_session *se_sess = se_cmd->se_sess; |
29a05dee | 65 | struct se_node_acl *nacl = se_sess->se_node_acl; |
29a05dee | 66 | struct se_dev_entry *deve; |
8fa3a867 | 67 | sense_reason_t ret = TCM_NO_SENSE; |
5951146d | 68 | |
29a05dee NB |
69 | rcu_read_lock(); |
70 | deve = target_nacl_find_deve(nacl, unpacked_lun); | |
71 | if (deve) { | |
72 | atomic_long_inc(&deve->total_cmds); | |
5951146d | 73 | |
5951146d | 74 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
29a05dee NB |
75 | atomic_long_add(se_cmd->data_length, |
76 | &deve->write_bytes); | |
5951146d | 77 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
29a05dee NB |
78 | atomic_long_add(se_cmd->data_length, |
79 | &deve->read_bytes); | |
5951146d | 80 | |
29a05dee | 81 | se_lun = rcu_dereference(deve->se_lun); |
bd4e2d29 NB |
82 | |
83 | if (!percpu_ref_tryget_live(&se_lun->lun_ref)) { | |
84 | se_lun = NULL; | |
85 | goto out_unlock; | |
86 | } | |
87 | ||
29a05dee | 88 | se_cmd->se_lun = rcu_dereference(deve->se_lun); |
c66ac9db NB |
89 | se_cmd->pr_res_key = deve->pr_res_key; |
90 | se_cmd->orig_fe_lun = unpacked_lun; | |
c66ac9db | 91 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
5277797d | 92 | se_cmd->lun_ref_active = true; |
8fa3a867 NB |
93 | |
94 | if ((se_cmd->data_direction == DMA_TO_DEVICE) && | |
03a68b44 | 95 | deve->lun_access_ro) { |
8fa3a867 NB |
96 | pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" |
97 | " Access for 0x%08llx\n", | |
30c7ca93 | 98 | se_cmd->se_tfo->fabric_name, |
8fa3a867 NB |
99 | unpacked_lun); |
100 | rcu_read_unlock(); | |
101 | ret = TCM_WRITE_PROTECTED; | |
102 | goto ref_dev; | |
103 | } | |
c66ac9db | 104 | } |
bd4e2d29 | 105 | out_unlock: |
29a05dee | 106 | rcu_read_unlock(); |
c66ac9db NB |
107 | |
108 | if (!se_lun) { | |
5951146d AG |
109 | /* |
110 | * Use the se_portal_group->tpg_virt_lun0 to allow for | |
111 | * REPORT_LUNS, et al to be returned when no active | |
112 | * MappedLUN=0 exists for this Initiator Port. | |
113 | */ | |
114 | if (unpacked_lun != 0) { | |
6708bb27 | 115 | pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
f2d30680 | 116 | " Access for 0x%08llx\n", |
30c7ca93 | 117 | se_cmd->se_tfo->fabric_name, |
c66ac9db | 118 | unpacked_lun); |
de103c93 | 119 | return TCM_NON_EXISTENT_LUN; |
5951146d | 120 | } |
5951146d | 121 | |
adf653f9 CH |
122 | se_lun = se_sess->se_tpg->tpg_virt_lun0; |
123 | se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0; | |
5951146d | 124 | se_cmd->orig_fe_lun = 0; |
5951146d | 125 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
5277797d NB |
126 | |
127 | percpu_ref_get(&se_lun->lun_ref); | |
128 | se_cmd->lun_ref_active = true; | |
8fa3a867 NB |
129 | |
130 | /* | |
131 | * Force WRITE PROTECT for virtual LUN 0 | |
132 | */ | |
133 | if ((se_cmd->data_direction != DMA_FROM_DEVICE) && | |
134 | (se_cmd->data_direction != DMA_NONE)) { | |
135 | ret = TCM_WRITE_PROTECTED; | |
136 | goto ref_dev; | |
137 | } | |
c66ac9db | 138 | } |
4cc987ea NB |
139 | /* |
140 | * RCU reference protected by percpu se_lun->lun_ref taken above that | |
141 | * must drop to zero (including initial reference) before this se_lun | |
142 | * pointer can be kfree_rcu() by the final se_lun->lun_group put via | |
143 | * target_core_fabric_configfs.c:target_fabric_port_release | |
144 | */ | |
8fa3a867 | 145 | ref_dev: |
4cc987ea NB |
146 | se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); |
147 | atomic_long_inc(&se_cmd->se_dev->num_cmds); | |
c66ac9db | 148 | |
c66ac9db | 149 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
4cc987ea NB |
150 | atomic_long_add(se_cmd->data_length, |
151 | &se_cmd->se_dev->write_bytes); | |
c66ac9db | 152 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
4cc987ea NB |
153 | atomic_long_add(se_cmd->data_length, |
154 | &se_cmd->se_dev->read_bytes); | |
c66ac9db | 155 | |
8fa3a867 | 156 | return ret; |
c66ac9db | 157 | } |
5951146d | 158 | EXPORT_SYMBOL(transport_lookup_cmd_lun); |
c66ac9db | 159 | |
f2d30680 | 160 | int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) |
c66ac9db | 161 | { |
c66ac9db NB |
162 | struct se_dev_entry *deve; |
163 | struct se_lun *se_lun = NULL; | |
e3d6f909 | 164 | struct se_session *se_sess = se_cmd->se_sess; |
29a05dee | 165 | struct se_node_acl *nacl = se_sess->se_node_acl; |
c66ac9db | 166 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; |
5e1be919 | 167 | unsigned long flags; |
c66ac9db | 168 | |
29a05dee NB |
169 | rcu_read_lock(); |
170 | deve = target_nacl_find_deve(nacl, unpacked_lun); | |
171 | if (deve) { | |
29a05dee | 172 | se_lun = rcu_dereference(deve->se_lun); |
eeb64d23 NB |
173 | |
174 | if (!percpu_ref_tryget_live(&se_lun->lun_ref)) { | |
175 | se_lun = NULL; | |
176 | goto out_unlock; | |
177 | } | |
178 | ||
179 | se_cmd->se_lun = rcu_dereference(deve->se_lun); | |
c66ac9db NB |
180 | se_cmd->pr_res_key = deve->pr_res_key; |
181 | se_cmd->orig_fe_lun = unpacked_lun; | |
eeb64d23 NB |
182 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
183 | se_cmd->lun_ref_active = true; | |
c66ac9db | 184 | } |
eeb64d23 | 185 | out_unlock: |
29a05dee | 186 | rcu_read_unlock(); |
c66ac9db NB |
187 | |
188 | if (!se_lun) { | |
6708bb27 | 189 | pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
f2d30680 | 190 | " Access for 0x%08llx\n", |
30c7ca93 | 191 | se_cmd->se_tfo->fabric_name, |
c66ac9db | 192 | unpacked_lun); |
e3d6f909 | 193 | return -ENODEV; |
c66ac9db | 194 | } |
4cc987ea NB |
195 | se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); |
196 | se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev); | |
5951146d | 197 | |
5e1be919 | 198 | spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); |
5951146d | 199 | list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); |
5e1be919 | 200 | spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); |
c66ac9db NB |
201 | |
202 | return 0; | |
203 | } | |
5951146d | 204 | EXPORT_SYMBOL(transport_lookup_tmr_lun); |
c66ac9db | 205 | |
29a05dee NB |
206 | bool target_lun_is_rdonly(struct se_cmd *cmd) |
207 | { | |
208 | struct se_session *se_sess = cmd->se_sess; | |
209 | struct se_dev_entry *deve; | |
210 | bool ret; | |
211 | ||
29a05dee NB |
212 | rcu_read_lock(); |
213 | deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun); | |
03a68b44 | 214 | ret = deve && deve->lun_access_ro; |
29a05dee NB |
215 | rcu_read_unlock(); |
216 | ||
217 | return ret; | |
218 | } | |
219 | EXPORT_SYMBOL(target_lun_is_rdonly); | |
220 | ||
c66ac9db NB |
221 | /* |
222 | * This function is called from core_scsi3_emulate_pro_register_and_move() | |
29a05dee | 223 | * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref |
c66ac9db NB |
224 | * when a matching rtpi is found. |
225 | */ | |
226 | struct se_dev_entry *core_get_se_deve_from_rtpi( | |
227 | struct se_node_acl *nacl, | |
228 | u16 rtpi) | |
229 | { | |
230 | struct se_dev_entry *deve; | |
231 | struct se_lun *lun; | |
c66ac9db | 232 | struct se_portal_group *tpg = nacl->se_tpg; |
c66ac9db | 233 | |
29a05dee NB |
234 | rcu_read_lock(); |
235 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
236 | lun = rcu_dereference(deve->se_lun); | |
6708bb27 AG |
237 | if (!lun) { |
238 | pr_err("%s device entries device pointer is" | |
c66ac9db | 239 | " NULL, but Initiator has access.\n", |
30c7ca93 | 240 | tpg->se_tpg_tfo->fabric_name); |
c66ac9db NB |
241 | continue; |
242 | } | |
29a05dee | 243 | if (lun->lun_rtpi != rtpi) |
c66ac9db NB |
244 | continue; |
245 | ||
29a05dee NB |
246 | kref_get(&deve->pr_kref); |
247 | rcu_read_unlock(); | |
c66ac9db NB |
248 | |
249 | return deve; | |
250 | } | |
29a05dee | 251 | rcu_read_unlock(); |
c66ac9db NB |
252 | |
253 | return NULL; | |
254 | } | |
255 | ||
29a05dee | 256 | void core_free_device_list_for_node( |
c66ac9db NB |
257 | struct se_node_acl *nacl, |
258 | struct se_portal_group *tpg) | |
259 | { | |
260 | struct se_dev_entry *deve; | |
c66ac9db | 261 | |
29a05dee NB |
262 | mutex_lock(&nacl->lun_entry_mutex); |
263 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
264 | struct se_lun *lun = rcu_dereference_check(deve->se_lun, | |
265 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
266 | core_disable_device_list_for_node(lun, deve, nacl, tpg); | |
c66ac9db | 267 | } |
29a05dee | 268 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db NB |
269 | } |
270 | ||
c66ac9db | 271 | void core_update_device_list_access( |
f2d30680 | 272 | u64 mapped_lun, |
03a68b44 | 273 | bool lun_access_ro, |
c66ac9db NB |
274 | struct se_node_acl *nacl) |
275 | { | |
276 | struct se_dev_entry *deve; | |
277 | ||
29a05dee NB |
278 | mutex_lock(&nacl->lun_entry_mutex); |
279 | deve = target_nacl_find_deve(nacl, mapped_lun); | |
03a68b44 AG |
280 | if (deve) |
281 | deve->lun_access_ro = lun_access_ro; | |
29a05dee | 282 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db NB |
283 | } |
284 | ||
29a05dee NB |
285 | /* |
286 | * Called with rcu_read_lock or nacl->device_list_lock held. | |
c66ac9db | 287 | */ |
f2d30680 | 288 | struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun) |
29a05dee NB |
289 | { |
290 | struct se_dev_entry *deve; | |
291 | ||
292 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) | |
293 | if (deve->mapped_lun == mapped_lun) | |
294 | return deve; | |
295 | ||
296 | return NULL; | |
297 | } | |
298 | EXPORT_SYMBOL(target_nacl_find_deve); | |
299 | ||
300 | void target_pr_kref_release(struct kref *kref) | |
301 | { | |
302 | struct se_dev_entry *deve = container_of(kref, struct se_dev_entry, | |
303 | pr_kref); | |
304 | complete(&deve->pr_comp); | |
c66ac9db NB |
305 | } |
306 | ||
7c0d0d51 HR |
307 | static void |
308 | target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new, | |
309 | bool skip_new) | |
310 | { | |
311 | struct se_dev_entry *tmp; | |
312 | ||
313 | rcu_read_lock(); | |
314 | hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) { | |
315 | if (skip_new && tmp == new) | |
316 | continue; | |
317 | core_scsi3_ua_allocate(tmp, 0x3F, | |
318 | ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED); | |
319 | } | |
320 | rcu_read_unlock(); | |
321 | } | |
322 | ||
e80ac6c4 | 323 | int core_enable_device_list_for_node( |
c66ac9db NB |
324 | struct se_lun *lun, |
325 | struct se_lun_acl *lun_acl, | |
f2d30680 | 326 | u64 mapped_lun, |
03a68b44 | 327 | bool lun_access_ro, |
c66ac9db | 328 | struct se_node_acl *nacl, |
e80ac6c4 | 329 | struct se_portal_group *tpg) |
c66ac9db | 330 | { |
29a05dee | 331 | struct se_dev_entry *orig, *new; |
c66ac9db | 332 | |
29a05dee NB |
333 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
334 | if (!new) { | |
335 | pr_err("Unable to allocate se_dev_entry memory\n"); | |
336 | return -ENOMEM; | |
337 | } | |
e80ac6c4 | 338 | |
29a05dee | 339 | spin_lock_init(&new->ua_lock); |
29a05dee | 340 | INIT_LIST_HEAD(&new->ua_list); |
adf653f9 | 341 | INIT_LIST_HEAD(&new->lun_link); |
e80ac6c4 | 342 | |
29a05dee NB |
343 | new->mapped_lun = mapped_lun; |
344 | kref_init(&new->pr_kref); | |
345 | init_completion(&new->pr_comp); | |
346 | ||
03a68b44 | 347 | new->lun_access_ro = lun_access_ro; |
29a05dee NB |
348 | new->creation_time = get_jiffies_64(); |
349 | new->attach_count++; | |
350 | ||
351 | mutex_lock(&nacl->lun_entry_mutex); | |
352 | orig = target_nacl_find_deve(nacl, mapped_lun); | |
353 | if (orig && orig->se_lun) { | |
354 | struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun, | |
355 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
356 | ||
357 | if (orig_lun != lun) { | |
358 | pr_err("Existing orig->se_lun doesn't match new lun" | |
359 | " for dynamic -> explicit NodeACL conversion:" | |
360 | " %s\n", nacl->initiatorname); | |
361 | mutex_unlock(&nacl->lun_entry_mutex); | |
362 | kfree(new); | |
e80ac6c4 | 363 | return -EINVAL; |
c66ac9db | 364 | } |
391e2a6d NB |
365 | if (orig->se_lun_acl != NULL) { |
366 | pr_warn_ratelimited("Detected existing explicit" | |
367 | " se_lun_acl->se_lun_group reference for %s" | |
368 | " mapped_lun: %llu, failing\n", | |
369 | nacl->initiatorname, mapped_lun); | |
370 | mutex_unlock(&nacl->lun_entry_mutex); | |
371 | kfree(new); | |
372 | return -EINVAL; | |
373 | } | |
c66ac9db | 374 | |
29a05dee NB |
375 | rcu_assign_pointer(new->se_lun, lun); |
376 | rcu_assign_pointer(new->se_lun_acl, lun_acl); | |
377 | hlist_del_rcu(&orig->link); | |
378 | hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); | |
379 | mutex_unlock(&nacl->lun_entry_mutex); | |
c66ac9db | 380 | |
1adff1b3 | 381 | spin_lock(&lun->lun_deve_lock); |
adf653f9 CH |
382 | list_del(&orig->lun_link); |
383 | list_add_tail(&new->lun_link, &lun->lun_deve_list); | |
1adff1b3 | 384 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db | 385 | |
29a05dee NB |
386 | kref_put(&orig->pr_kref, target_pr_kref_release); |
387 | wait_for_completion(&orig->pr_comp); | |
c66ac9db | 388 | |
7c0d0d51 | 389 | target_luns_data_has_changed(nacl, new, true); |
29a05dee NB |
390 | kfree_rcu(orig, rcu_head); |
391 | return 0; | |
c66ac9db | 392 | } |
e80ac6c4 | 393 | |
29a05dee NB |
394 | rcu_assign_pointer(new->se_lun, lun); |
395 | rcu_assign_pointer(new->se_lun_acl, lun_acl); | |
396 | hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); | |
397 | mutex_unlock(&nacl->lun_entry_mutex); | |
e80ac6c4 | 398 | |
1adff1b3 | 399 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 400 | list_add_tail(&new->lun_link, &lun->lun_deve_list); |
1adff1b3 | 401 | spin_unlock(&lun->lun_deve_lock); |
e80ac6c4 | 402 | |
7c0d0d51 | 403 | target_luns_data_has_changed(nacl, new, true); |
e80ac6c4 AG |
404 | return 0; |
405 | } | |
406 | ||
29a05dee NB |
407 | /* |
408 | * Called with se_node_acl->lun_entry_mutex held. | |
e80ac6c4 | 409 | */ |
29a05dee | 410 | void core_disable_device_list_for_node( |
e80ac6c4 | 411 | struct se_lun *lun, |
29a05dee | 412 | struct se_dev_entry *orig, |
e80ac6c4 AG |
413 | struct se_node_acl *nacl, |
414 | struct se_portal_group *tpg) | |
415 | { | |
4cc987ea NB |
416 | /* |
417 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
418 | * reference to se_device->dev_group. | |
419 | */ | |
420 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
e80ac6c4 AG |
421 | /* |
422 | * If the MappedLUN entry is being disabled, the entry in | |
adf653f9 | 423 | * lun->lun_deve_list must be removed now before clearing the |
e80ac6c4 AG |
424 | * struct se_dev_entry pointers below as logic in |
425 | * core_alua_do_transition_tg_pt() depends on these being present. | |
426 | * | |
427 | * deve->se_lun_acl will be NULL for demo-mode created LUNs | |
428 | * that have not been explicitly converted to MappedLUNs -> | |
adf653f9 CH |
429 | * struct se_lun_acl, but we remove deve->lun_link from |
430 | * lun->lun_deve_list. This also means that active UAs and | |
e80ac6c4 AG |
431 | * NodeACL context specific PR metadata for demo-mode |
432 | * MappedLUN *deve will be released below.. | |
433 | */ | |
1adff1b3 | 434 | spin_lock(&lun->lun_deve_lock); |
adf653f9 | 435 | list_del(&orig->lun_link); |
1adff1b3 | 436 | spin_unlock(&lun->lun_deve_lock); |
c66ac9db | 437 | /* |
29a05dee | 438 | * Disable struct se_dev_entry LUN ACL mapping |
c66ac9db | 439 | */ |
29a05dee NB |
440 | core_scsi3_ua_release_all(orig); |
441 | ||
442 | hlist_del_rcu(&orig->link); | |
80bfdfa9 | 443 | clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags); |
03a68b44 | 444 | orig->lun_access_ro = false; |
29a05dee NB |
445 | orig->creation_time = 0; |
446 | orig->attach_count--; | |
c66ac9db | 447 | /* |
29a05dee NB |
448 | * Before firing off RCU callback, wait for any in process SPEC_I_PT=1 |
449 | * or REGISTER_AND_MOVE PR operation to complete. | |
c66ac9db | 450 | */ |
29a05dee NB |
451 | kref_put(&orig->pr_kref, target_pr_kref_release); |
452 | wait_for_completion(&orig->pr_comp); | |
453 | ||
3ccd6e83 NB |
454 | rcu_assign_pointer(orig->se_lun, NULL); |
455 | rcu_assign_pointer(orig->se_lun_acl, NULL); | |
456 | ||
29a05dee | 457 | kfree_rcu(orig, rcu_head); |
c66ac9db | 458 | |
4cc987ea | 459 | core_scsi3_free_pr_reg_from_nacl(dev, nacl); |
7c0d0d51 | 460 | target_luns_data_has_changed(nacl, NULL, false); |
c66ac9db NB |
461 | } |
462 | ||
463 | /* core_clear_lun_from_tpg(): | |
464 | * | |
465 | * | |
466 | */ | |
467 | void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) | |
468 | { | |
469 | struct se_node_acl *nacl; | |
470 | struct se_dev_entry *deve; | |
c66ac9db | 471 | |
403edd78 | 472 | mutex_lock(&tpg->acl_node_mutex); |
c66ac9db | 473 | list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { |
c66ac9db | 474 | |
29a05dee NB |
475 | mutex_lock(&nacl->lun_entry_mutex); |
476 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
477 | struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun, | |
478 | lockdep_is_held(&nacl->lun_entry_mutex)); | |
c66ac9db | 479 | |
29a05dee NB |
480 | if (lun != tmp_lun) |
481 | continue; | |
c66ac9db | 482 | |
29a05dee | 483 | core_disable_device_list_for_node(lun, deve, nacl, tpg); |
c66ac9db | 484 | } |
29a05dee | 485 | mutex_unlock(&nacl->lun_entry_mutex); |
c66ac9db | 486 | } |
403edd78 | 487 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
488 | } |
489 | ||
adf653f9 | 490 | int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev) |
c66ac9db | 491 | { |
adf653f9 | 492 | struct se_lun *tmp; |
c66ac9db NB |
493 | |
494 | spin_lock(&dev->se_port_lock); | |
adf653f9 | 495 | if (dev->export_count == 0x0000ffff) { |
6708bb27 | 496 | pr_warn("Reached dev->dev_port_count ==" |
c66ac9db NB |
497 | " 0x0000ffff\n"); |
498 | spin_unlock(&dev->se_port_lock); | |
adf653f9 | 499 | return -ENOSPC; |
c66ac9db NB |
500 | } |
501 | again: | |
502 | /* | |
35d1efe8 | 503 | * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device |
c66ac9db NB |
504 | * Here is the table from spc4r17 section 7.7.3.8. |
505 | * | |
506 | * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field | |
507 | * | |
508 | * Code Description | |
509 | * 0h Reserved | |
510 | * 1h Relative port 1, historically known as port A | |
511 | * 2h Relative port 2, historically known as port B | |
512 | * 3h to FFFFh Relative port 3 through 65 535 | |
513 | */ | |
adf653f9 CH |
514 | lun->lun_rtpi = dev->dev_rpti_counter++; |
515 | if (!lun->lun_rtpi) | |
c66ac9db NB |
516 | goto again; |
517 | ||
adf653f9 | 518 | list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) { |
c66ac9db | 519 | /* |
35d1efe8 | 520 | * Make sure RELATIVE TARGET PORT IDENTIFIER is unique |
c66ac9db NB |
521 | * for 16-bit wrap.. |
522 | */ | |
adf653f9 | 523 | if (lun->lun_rtpi == tmp->lun_rtpi) |
c66ac9db NB |
524 | goto again; |
525 | } | |
526 | spin_unlock(&dev->se_port_lock); | |
527 | ||
c66ac9db NB |
528 | return 0; |
529 | } | |
530 | ||
0fd97ccf | 531 | static void se_release_vpd_for_dev(struct se_device *dev) |
c66ac9db NB |
532 | { |
533 | struct t10_vpd *vpd, *vpd_tmp; | |
534 | ||
0fd97ccf | 535 | spin_lock(&dev->t10_wwn.t10_vpd_lock); |
c66ac9db | 536 | list_for_each_entry_safe(vpd, vpd_tmp, |
0fd97ccf | 537 | &dev->t10_wwn.t10_vpd_list, vpd_list) { |
c66ac9db NB |
538 | list_del(&vpd->vpd_list); |
539 | kfree(vpd); | |
540 | } | |
0fd97ccf | 541 | spin_unlock(&dev->t10_wwn.t10_vpd_lock); |
c66ac9db NB |
542 | } |
543 | ||
c8045372 | 544 | static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) |
525a48a2 | 545 | { |
3e03989b RD |
546 | u32 aligned_max_sectors; |
547 | u32 alignment; | |
525a48a2 NB |
548 | /* |
549 | * Limit max_sectors to a PAGE_SIZE aligned value for modern | |
550 | * transport_allocate_data_tasks() operation. | |
551 | */ | |
3e03989b RD |
552 | alignment = max(1ul, PAGE_SIZE / block_size); |
553 | aligned_max_sectors = rounddown(max_sectors, alignment); | |
554 | ||
555 | if (max_sectors != aligned_max_sectors) | |
556 | pr_info("Rounding down aligned max_sectors from %u to %u\n", | |
557 | max_sectors, aligned_max_sectors); | |
525a48a2 | 558 | |
3e03989b | 559 | return aligned_max_sectors; |
525a48a2 NB |
560 | } |
561 | ||
6bb82612 | 562 | int core_dev_add_lun( |
c66ac9db | 563 | struct se_portal_group *tpg, |
c66ac9db | 564 | struct se_device *dev, |
6bb82612 | 565 | struct se_lun *lun) |
c66ac9db | 566 | { |
8d9efe53 | 567 | int rc; |
c66ac9db | 568 | |
03a68b44 | 569 | rc = core_tpg_add_lun(tpg, lun, false, dev); |
8d9efe53 | 570 | if (rc < 0) |
6bb82612 | 571 | return rc; |
c66ac9db | 572 | |
f2d30680 | 573 | pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from" |
30c7ca93 | 574 | " CORE HBA: %u\n", tpg->se_tpg_tfo->fabric_name, |
2af7973a | 575 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
30c7ca93 | 576 | tpg->se_tpg_tfo->fabric_name, dev->se_hba->hba_id); |
c66ac9db NB |
577 | /* |
578 | * Update LUN maps for dynamically added initiators when | |
579 | * generate_node_acl is enabled. | |
580 | */ | |
e3d6f909 | 581 | if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { |
c66ac9db | 582 | struct se_node_acl *acl; |
403edd78 NB |
583 | |
584 | mutex_lock(&tpg->acl_node_mutex); | |
c66ac9db | 585 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
052605c6 NB |
586 | if (acl->dynamic_node_acl && |
587 | (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || | |
588 | !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { | |
df9766ca | 589 | core_tpg_add_node_to_devs(acl, tpg, lun); |
c66ac9db NB |
590 | } |
591 | } | |
403edd78 | 592 | mutex_unlock(&tpg->acl_node_mutex); |
c66ac9db NB |
593 | } |
594 | ||
6bb82612 | 595 | return 0; |
c66ac9db NB |
596 | } |
597 | ||
598 | /* core_dev_del_lun(): | |
599 | * | |
600 | * | |
601 | */ | |
cd9d7cba | 602 | void core_dev_del_lun( |
c66ac9db | 603 | struct se_portal_group *tpg, |
cd9d7cba | 604 | struct se_lun *lun) |
c66ac9db | 605 | { |
f2d30680 | 606 | pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from" |
30c7ca93 | 607 | " device object\n", tpg->se_tpg_tfo->fabric_name, |
cd9d7cba | 608 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
30c7ca93 | 609 | tpg->se_tpg_tfo->fabric_name); |
c66ac9db | 610 | |
cd9d7cba | 611 | core_tpg_remove_lun(tpg, lun); |
c66ac9db NB |
612 | } |
613 | ||
c66ac9db NB |
614 | struct se_lun_acl *core_dev_init_initiator_node_lun_acl( |
615 | struct se_portal_group *tpg, | |
fcf29481 | 616 | struct se_node_acl *nacl, |
f2d30680 | 617 | u64 mapped_lun, |
c66ac9db NB |
618 | int *ret) |
619 | { | |
620 | struct se_lun_acl *lacl; | |
c66ac9db | 621 | |
fcf29481 | 622 | if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { |
6708bb27 | 623 | pr_err("%s InitiatorName exceeds maximum size.\n", |
30c7ca93 | 624 | tpg->se_tpg_tfo->fabric_name); |
c66ac9db NB |
625 | *ret = -EOVERFLOW; |
626 | return NULL; | |
627 | } | |
c66ac9db | 628 | lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); |
6708bb27 AG |
629 | if (!lacl) { |
630 | pr_err("Unable to allocate memory for struct se_lun_acl.\n"); | |
c66ac9db NB |
631 | *ret = -ENOMEM; |
632 | return NULL; | |
633 | } | |
634 | ||
c66ac9db NB |
635 | lacl->mapped_lun = mapped_lun; |
636 | lacl->se_lun_nacl = nacl; | |
c66ac9db NB |
637 | |
638 | return lacl; | |
639 | } | |
640 | ||
641 | int core_dev_add_initiator_node_lun_acl( | |
642 | struct se_portal_group *tpg, | |
643 | struct se_lun_acl *lacl, | |
6bb82612 | 644 | struct se_lun *lun, |
03a68b44 | 645 | bool lun_access_ro) |
c66ac9db | 646 | { |
6bb82612 | 647 | struct se_node_acl *nacl = lacl->se_lun_nacl; |
4cc987ea NB |
648 | /* |
649 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
650 | * reference to se_device->dev_group. | |
651 | */ | |
652 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); | |
c66ac9db | 653 | |
6708bb27 | 654 | if (!nacl) |
c66ac9db NB |
655 | return -EINVAL; |
656 | ||
03a68b44 AG |
657 | if (lun->lun_access_ro) |
658 | lun_access_ro = true; | |
c66ac9db NB |
659 | |
660 | lacl->se_lun = lun; | |
661 | ||
e80ac6c4 | 662 | if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, |
03a68b44 | 663 | lun_access_ro, nacl, tpg) < 0) |
c66ac9db NB |
664 | return -EINVAL; |
665 | ||
f2d30680 | 666 | pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for " |
30c7ca93 | 667 | " InitiatorNode: %s\n", tpg->se_tpg_tfo->fabric_name, |
6bb82612 | 668 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun, |
03a68b44 | 669 | lun_access_ro ? "RO" : "RW", |
b6a54b8d | 670 | nacl->initiatorname); |
c66ac9db NB |
671 | /* |
672 | * Check to see if there are any existing persistent reservation APTPL | |
673 | * pre-registrations that need to be enabled for this LUN ACL.. | |
674 | */ | |
4cc987ea | 675 | core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl, |
e2480563 | 676 | lacl->mapped_lun); |
c66ac9db NB |
677 | return 0; |
678 | } | |
679 | ||
c66ac9db | 680 | int core_dev_del_initiator_node_lun_acl( |
c66ac9db NB |
681 | struct se_lun *lun, |
682 | struct se_lun_acl *lacl) | |
683 | { | |
adf653f9 | 684 | struct se_portal_group *tpg = lun->lun_tpg; |
c66ac9db | 685 | struct se_node_acl *nacl; |
29a05dee | 686 | struct se_dev_entry *deve; |
c66ac9db NB |
687 | |
688 | nacl = lacl->se_lun_nacl; | |
6708bb27 | 689 | if (!nacl) |
c66ac9db NB |
690 | return -EINVAL; |
691 | ||
29a05dee NB |
692 | mutex_lock(&nacl->lun_entry_mutex); |
693 | deve = target_nacl_find_deve(nacl, lacl->mapped_lun); | |
694 | if (deve) | |
695 | core_disable_device_list_for_node(lun, deve, nacl, tpg); | |
696 | mutex_unlock(&nacl->lun_entry_mutex); | |
c66ac9db | 697 | |
f2d30680 HR |
698 | pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for" |
699 | " InitiatorNode: %s Mapped LUN: %llu\n", | |
30c7ca93 | 700 | tpg->se_tpg_tfo->fabric_name, |
e3d6f909 | 701 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
b6a54b8d | 702 | nacl->initiatorname, lacl->mapped_lun); |
c66ac9db NB |
703 | |
704 | return 0; | |
705 | } | |
706 | ||
707 | void core_dev_free_initiator_node_lun_acl( | |
708 | struct se_portal_group *tpg, | |
709 | struct se_lun_acl *lacl) | |
710 | { | |
6708bb27 | 711 | pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" |
30c7ca93 | 712 | " Mapped LUN: %llu\n", tpg->se_tpg_tfo->fabric_name, |
e3d6f909 | 713 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
30c7ca93 | 714 | tpg->se_tpg_tfo->fabric_name, |
b6a54b8d | 715 | lacl->se_lun_nacl->initiatorname, lacl->mapped_lun); |
c66ac9db NB |
716 | |
717 | kfree(lacl); | |
718 | } | |
719 | ||
0fd97ccf CH |
720 | static void scsi_dump_inquiry(struct se_device *dev) |
721 | { | |
722 | struct t10_wwn *wwn = &dev->t10_wwn; | |
b2da4abf DD |
723 | int device_type = dev->transport->get_device_type(dev); |
724 | ||
0fd97ccf CH |
725 | /* |
726 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
727 | */ | |
b2da4abf DD |
728 | pr_debug(" Vendor: %-" __stringify(INQUIRY_VENDOR_LEN) "s\n", |
729 | wwn->vendor); | |
730 | pr_debug(" Model: %-" __stringify(INQUIRY_MODEL_LEN) "s\n", | |
731 | wwn->model); | |
732 | pr_debug(" Revision: %-" __stringify(INQUIRY_REVISION_LEN) "s\n", | |
733 | wwn->revision); | |
0fd97ccf | 734 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
0fd97ccf CH |
735 | } |
736 | ||
737 | struct se_device *target_alloc_device(struct se_hba *hba, const char *name) | |
738 | { | |
739 | struct se_device *dev; | |
4863e525 | 740 | struct se_lun *xcopy_lun; |
0fd97ccf | 741 | |
0a06d430 | 742 | dev = hba->backend->ops->alloc_device(hba, name); |
0fd97ccf CH |
743 | if (!dev) |
744 | return NULL; | |
745 | ||
746 | dev->se_hba = hba; | |
0a06d430 | 747 | dev->transport = hba->backend->ops; |
fe052a18 | 748 | dev->prot_length = sizeof(struct t10_pi_tuple); |
4cc987ea | 749 | dev->hba_index = hba->hba_index; |
0fd97ccf | 750 | |
0fd97ccf CH |
751 | INIT_LIST_HEAD(&dev->dev_sep_list); |
752 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
753 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
754 | INIT_LIST_HEAD(&dev->state_list); | |
755 | INIT_LIST_HEAD(&dev->qf_cmd_list); | |
0fd97ccf CH |
756 | spin_lock_init(&dev->execute_task_lock); |
757 | spin_lock_init(&dev->delayed_cmd_lock); | |
758 | spin_lock_init(&dev->dev_reservation_lock); | |
759 | spin_lock_init(&dev->se_port_lock); | |
760 | spin_lock_init(&dev->se_tmr_lock); | |
761 | spin_lock_init(&dev->qf_cmd_lock); | |
68ff9b9b | 762 | sema_init(&dev->caw_sem, 1); |
0fd97ccf CH |
763 | INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); |
764 | spin_lock_init(&dev->t10_wwn.t10_vpd_lock); | |
765 | INIT_LIST_HEAD(&dev->t10_pr.registration_list); | |
766 | INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); | |
767 | spin_lock_init(&dev->t10_pr.registration_lock); | |
768 | spin_lock_init(&dev->t10_pr.aptpl_reg_lock); | |
769 | INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); | |
770 | spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); | |
c66094bf HR |
771 | INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); |
772 | spin_lock_init(&dev->t10_alua.lba_map_lock); | |
0fd97ccf | 773 | |
0fd97ccf CH |
774 | dev->t10_wwn.t10_dev = dev; |
775 | dev->t10_alua.t10_dev = dev; | |
776 | ||
777 | dev->dev_attrib.da_dev = dev; | |
adfa9570 | 778 | dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; |
814e5b45 CH |
779 | dev->dev_attrib.emulate_dpo = 1; |
780 | dev->dev_attrib.emulate_fua_write = 1; | |
781 | dev->dev_attrib.emulate_fua_read = 1; | |
0fd97ccf CH |
782 | dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; |
783 | dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; | |
784 | dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; | |
785 | dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; | |
786 | dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; | |
0123a9ec | 787 | dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; |
d397a445 | 788 | dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; |
b49d6f78 | 789 | dev->dev_attrib.emulate_pr = DA_EMULATE_PR; |
2ed22c9c | 790 | dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; |
0fd97ccf | 791 | dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; |
92404e60 | 792 | dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; |
0fd97ccf CH |
793 | dev->dev_attrib.is_nonrot = DA_IS_NONROT; |
794 | dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; | |
795 | dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; | |
796 | dev->dev_attrib.max_unmap_block_desc_count = | |
797 | DA_MAX_UNMAP_BLOCK_DESC_COUNT; | |
798 | dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; | |
799 | dev->dev_attrib.unmap_granularity_alignment = | |
800 | DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; | |
e6f41633 JP |
801 | dev->dev_attrib.unmap_zeroes_data = |
802 | DA_UNMAP_ZEROES_DATA_DEFAULT; | |
773cbaf7 | 803 | dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; |
0fd97ccf | 804 | |
4863e525 | 805 | xcopy_lun = &dev->xcopy_lun; |
4cc987ea | 806 | rcu_assign_pointer(xcopy_lun->lun_se_dev, dev); |
bd4e2d29 | 807 | init_completion(&xcopy_lun->lun_shutdown_comp); |
adf653f9 CH |
808 | INIT_LIST_HEAD(&xcopy_lun->lun_deve_list); |
809 | INIT_LIST_HEAD(&xcopy_lun->lun_dev_link); | |
810 | mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); | |
811 | xcopy_lun->lun_tpg = &xcopy_pt_tpg; | |
4863e525 | 812 | |
3beeabd5 DD |
813 | /* Preload the default INQUIRY const values */ |
814 | strlcpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor)); | |
815 | strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, | |
816 | sizeof(dev->t10_wwn.model)); | |
817 | strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, | |
818 | sizeof(dev->t10_wwn.revision)); | |
819 | ||
0fd97ccf CH |
820 | return dev; |
821 | } | |
822 | ||
8a9ebe71 MC |
823 | /* |
824 | * Check if the underlying struct block_device request_queue supports | |
825 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM | |
826 | * in ATA and we need to set TPE=1 | |
827 | */ | |
828 | bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, | |
ea263c7f | 829 | struct request_queue *q) |
8a9ebe71 | 830 | { |
ea263c7f MC |
831 | int block_size = queue_logical_block_size(q); |
832 | ||
8a9ebe71 MC |
833 | if (!blk_queue_discard(q)) |
834 | return false; | |
835 | ||
ea263c7f MC |
836 | attrib->max_unmap_lba_count = |
837 | q->limits.max_discard_sectors >> (ilog2(block_size) - 9); | |
8a9ebe71 MC |
838 | /* |
839 | * Currently hardcoded to 1 in Linux/SCSI code.. | |
840 | */ | |
841 | attrib->max_unmap_block_desc_count = 1; | |
842 | attrib->unmap_granularity = q->limits.discard_granularity / block_size; | |
843 | attrib->unmap_granularity_alignment = q->limits.discard_alignment / | |
844 | block_size; | |
2237498f | 845 | attrib->unmap_zeroes_data = (q->limits.max_write_zeroes_sectors); |
8a9ebe71 MC |
846 | return true; |
847 | } | |
848 | EXPORT_SYMBOL(target_configure_unmap_from_queue); | |
849 | ||
850 | /* | |
851 | * Convert from blocksize advertised to the initiator to the 512 byte | |
852 | * units unconditionally used by the Linux block layer. | |
853 | */ | |
854 | sector_t target_to_linux_sector(struct se_device *dev, sector_t lb) | |
855 | { | |
856 | switch (dev->dev_attrib.block_size) { | |
857 | case 4096: | |
858 | return lb << 3; | |
859 | case 2048: | |
860 | return lb << 2; | |
861 | case 1024: | |
862 | return lb << 1; | |
863 | default: | |
864 | return lb; | |
865 | } | |
866 | } | |
867 | EXPORT_SYMBOL(target_to_linux_sector); | |
868 | ||
b1943fd4 | 869 | struct devices_idr_iter { |
36d4cb46 | 870 | struct config_item *prev_item; |
b1943fd4 MC |
871 | int (*fn)(struct se_device *dev, void *data); |
872 | void *data; | |
873 | }; | |
874 | ||
875 | static int target_devices_idr_iter(int id, void *p, void *data) | |
36d4cb46 | 876 | __must_hold(&device_mutex) |
b1943fd4 MC |
877 | { |
878 | struct devices_idr_iter *iter = data; | |
879 | struct se_device *dev = p; | |
36d4cb46 BVA |
880 | int ret; |
881 | ||
882 | config_item_put(iter->prev_item); | |
883 | iter->prev_item = NULL; | |
b1943fd4 MC |
884 | |
885 | /* | |
886 | * We add the device early to the idr, so it can be used | |
887 | * by backend modules during configuration. We do not want | |
888 | * to allow other callers to access partially setup devices, | |
889 | * so we skip them here. | |
890 | */ | |
cb0f32e1 | 891 | if (!target_dev_configured(dev)) |
b1943fd4 MC |
892 | return 0; |
893 | ||
36d4cb46 BVA |
894 | iter->prev_item = config_item_get_unless_zero(&dev->dev_group.cg_item); |
895 | if (!iter->prev_item) | |
896 | return 0; | |
897 | mutex_unlock(&device_mutex); | |
898 | ||
899 | ret = iter->fn(dev, iter->data); | |
900 | ||
901 | mutex_lock(&device_mutex); | |
902 | return ret; | |
b1943fd4 MC |
903 | } |
904 | ||
905 | /** | |
906 | * target_for_each_device - iterate over configured devices | |
907 | * @fn: iterator function | |
908 | * @data: pointer to data that will be passed to fn | |
909 | * | |
910 | * fn must return 0 to continue looping over devices. non-zero will break | |
911 | * from the loop and return that value to the caller. | |
912 | */ | |
913 | int target_for_each_device(int (*fn)(struct se_device *dev, void *data), | |
914 | void *data) | |
915 | { | |
36d4cb46 | 916 | struct devices_idr_iter iter = { .fn = fn, .data = data }; |
b1943fd4 MC |
917 | int ret; |
918 | ||
be50f538 | 919 | mutex_lock(&device_mutex); |
b1943fd4 | 920 | ret = idr_for_each(&devices_idr, target_devices_idr_iter, &iter); |
be50f538 | 921 | mutex_unlock(&device_mutex); |
36d4cb46 | 922 | config_item_put(iter.prev_item); |
b1943fd4 MC |
923 | return ret; |
924 | } | |
925 | ||
0fd97ccf CH |
926 | int target_configure_device(struct se_device *dev) |
927 | { | |
928 | struct se_hba *hba = dev->se_hba; | |
0a5eee64 | 929 | int ret, id; |
0fd97ccf | 930 | |
cb0f32e1 | 931 | if (target_dev_configured(dev)) { |
0fd97ccf CH |
932 | pr_err("se_dev->se_dev_ptr already set for storage" |
933 | " object\n"); | |
934 | return -EEXIST; | |
935 | } | |
936 | ||
0a5eee64 MC |
937 | /* |
938 | * Add early so modules like tcmu can use during its | |
939 | * configuration. | |
940 | */ | |
be50f538 | 941 | mutex_lock(&device_mutex); |
0a5eee64 MC |
942 | /* |
943 | * Use cyclic to try and avoid collisions with devices | |
944 | * that were recently removed. | |
945 | */ | |
946 | id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL); | |
be50f538 | 947 | mutex_unlock(&device_mutex); |
0a5eee64 MC |
948 | if (id < 0) { |
949 | ret = -ENOMEM; | |
950 | goto out; | |
951 | } | |
952 | dev->dev_index = id; | |
953 | ||
0fd97ccf CH |
954 | ret = dev->transport->configure_device(dev); |
955 | if (ret) | |
0a5eee64 | 956 | goto out_free_index; |
0fd97ccf CH |
957 | /* |
958 | * XXX: there is not much point to have two different values here.. | |
959 | */ | |
960 | dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; | |
961 | dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; | |
962 | ||
963 | /* | |
964 | * Align max_hw_sectors down to PAGE_SIZE I/O transfers | |
965 | */ | |
966 | dev->dev_attrib.hw_max_sectors = | |
967 | se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, | |
968 | dev->dev_attrib.hw_block_size); | |
046ba642 | 969 | dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; |
0fd97ccf | 970 | |
0fd97ccf CH |
971 | dev->creation_time = get_jiffies_64(); |
972 | ||
0fd97ccf CH |
973 | ret = core_setup_alua(dev); |
974 | if (ret) | |
c82b59e7 | 975 | goto out_destroy_device; |
0fd97ccf | 976 | |
0fd97ccf CH |
977 | /* |
978 | * Setup work_queue for QUEUE_FULL | |
979 | */ | |
980 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
981 | ||
0fd97ccf CH |
982 | scsi_dump_inquiry(dev); |
983 | ||
984 | spin_lock(&hba->device_lock); | |
985 | hba->dev_count++; | |
986 | spin_unlock(&hba->device_lock); | |
d9ea32bf | 987 | |
5f7da044 NB |
988 | dev->dev_flags |= DF_CONFIGURED; |
989 | ||
0fd97ccf CH |
990 | return 0; |
991 | ||
c82b59e7 | 992 | out_destroy_device: |
993 | dev->transport->destroy_device(dev); | |
0a5eee64 | 994 | out_free_index: |
be50f538 | 995 | mutex_lock(&device_mutex); |
0a5eee64 | 996 | idr_remove(&devices_idr, dev->dev_index); |
be50f538 | 997 | mutex_unlock(&device_mutex); |
0fd97ccf CH |
998 | out: |
999 | se_release_vpd_for_dev(dev); | |
1000 | return ret; | |
1001 | } | |
1002 | ||
1003 | void target_free_device(struct se_device *dev) | |
1004 | { | |
1005 | struct se_hba *hba = dev->se_hba; | |
1006 | ||
1007 | WARN_ON(!list_empty(&dev->dev_sep_list)); | |
1008 | ||
cb0f32e1 | 1009 | if (target_dev_configured(dev)) { |
92634706 MC |
1010 | dev->transport->destroy_device(dev); |
1011 | ||
be50f538 | 1012 | mutex_lock(&device_mutex); |
0a5eee64 | 1013 | idr_remove(&devices_idr, dev->dev_index); |
be50f538 | 1014 | mutex_unlock(&device_mutex); |
d9ea32bf | 1015 | |
0fd97ccf CH |
1016 | spin_lock(&hba->device_lock); |
1017 | hba->dev_count--; | |
1018 | spin_unlock(&hba->device_lock); | |
1019 | } | |
1020 | ||
1021 | core_alua_free_lu_gp_mem(dev); | |
229d4f11 | 1022 | core_alua_set_lba_map(dev, NULL, 0, 0); |
0fd97ccf CH |
1023 | core_scsi3_free_all_registrations(dev); |
1024 | se_release_vpd_for_dev(dev); | |
1025 | ||
2ed22c9c NB |
1026 | if (dev->transport->free_prot) |
1027 | dev->transport->free_prot(dev); | |
1028 | ||
0fd97ccf CH |
1029 | dev->transport->free_device(dev); |
1030 | } | |
1031 | ||
c66ac9db NB |
1032 | int core_dev_setup_virtual_lun0(void) |
1033 | { | |
1034 | struct se_hba *hba; | |
1035 | struct se_device *dev; | |
db5d1c3c | 1036 | char buf[] = "rd_pages=8,rd_nullio=1"; |
c66ac9db NB |
1037 | int ret; |
1038 | ||
6708bb27 | 1039 | hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); |
c66ac9db NB |
1040 | if (IS_ERR(hba)) |
1041 | return PTR_ERR(hba); | |
1042 | ||
0fd97ccf CH |
1043 | dev = target_alloc_device(hba, "virt_lun0"); |
1044 | if (!dev) { | |
c66ac9db | 1045 | ret = -ENOMEM; |
0fd97ccf | 1046 | goto out_free_hba; |
c66ac9db | 1047 | } |
c66ac9db | 1048 | |
0a06d430 | 1049 | hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf)); |
c66ac9db | 1050 | |
0fd97ccf CH |
1051 | ret = target_configure_device(dev); |
1052 | if (ret) | |
1053 | goto out_free_se_dev; | |
c66ac9db | 1054 | |
0fd97ccf CH |
1055 | lun0_hba = hba; |
1056 | g_lun0_dev = dev; | |
c66ac9db | 1057 | return 0; |
0fd97ccf CH |
1058 | |
1059 | out_free_se_dev: | |
1060 | target_free_device(dev); | |
1061 | out_free_hba: | |
1062 | core_delete_hba(hba); | |
c66ac9db NB |
1063 | return ret; |
1064 | } | |
1065 | ||
1066 | ||
1067 | void core_dev_release_virtual_lun0(void) | |
1068 | { | |
e3d6f909 | 1069 | struct se_hba *hba = lun0_hba; |
c66ac9db | 1070 | |
6708bb27 | 1071 | if (!hba) |
c66ac9db NB |
1072 | return; |
1073 | ||
e3d6f909 | 1074 | if (g_lun0_dev) |
0fd97ccf | 1075 | target_free_device(g_lun0_dev); |
c66ac9db NB |
1076 | core_delete_hba(hba); |
1077 | } | |
7bfea53b AG |
1078 | |
1079 | /* | |
1080 | * Common CDB parsing for kernel and user passthrough. | |
1081 | */ | |
1082 | sense_reason_t | |
1083 | passthrough_parse_cdb(struct se_cmd *cmd, | |
1084 | sense_reason_t (*exec_cmd)(struct se_cmd *cmd)) | |
1085 | { | |
1086 | unsigned char *cdb = cmd->t_task_cdb; | |
4ec5bf0e BL |
1087 | struct se_device *dev = cmd->se_dev; |
1088 | unsigned int size; | |
7bfea53b AG |
1089 | |
1090 | /* | |
1091 | * Clear a lun set in the cdb if the initiator talking to use spoke | |
1092 | * and old standards version, as we can't assume the underlying device | |
1093 | * won't choke up on it. | |
1094 | */ | |
1095 | switch (cdb[0]) { | |
1096 | case READ_10: /* SBC - RDProtect */ | |
1097 | case READ_12: /* SBC - RDProtect */ | |
1098 | case READ_16: /* SBC - RDProtect */ | |
1099 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1100 | case VERIFY: /* SBC - VRProtect */ | |
1101 | case VERIFY_16: /* SBC - VRProtect */ | |
1102 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1103 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1104 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ | |
1105 | break; | |
1106 | default: | |
1107 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1108 | break; | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * For REPORT LUNS we always need to emulate the response, for everything | |
1113 | * else, pass it up. | |
1114 | */ | |
1115 | if (cdb[0] == REPORT_LUNS) { | |
1116 | cmd->execute_cmd = spc_emulate_report_luns; | |
1117 | return TCM_NO_SENSE; | |
1118 | } | |
1119 | ||
b49d6f78 DD |
1120 | /* |
1121 | * With emulate_pr disabled, all reservation requests should fail, | |
1122 | * regardless of whether or not TRANSPORT_FLAG_PASSTHROUGH_PGR is set. | |
1123 | */ | |
1124 | if (!dev->dev_attrib.emulate_pr && | |
1125 | ((cdb[0] == PERSISTENT_RESERVE_IN) || | |
1126 | (cdb[0] == PERSISTENT_RESERVE_OUT) || | |
1127 | (cdb[0] == RELEASE || cdb[0] == RELEASE_10) || | |
1128 | (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) { | |
1129 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
1130 | } | |
1131 | ||
4ec5bf0e BL |
1132 | /* |
1133 | * For PERSISTENT RESERVE IN/OUT, RELEASE, and RESERVE we need to | |
1134 | * emulate the response, since tcmu does not have the information | |
1135 | * required to process these commands. | |
1136 | */ | |
1137 | if (!(dev->transport->transport_flags & | |
1138 | TRANSPORT_FLAG_PASSTHROUGH_PGR)) { | |
1139 | if (cdb[0] == PERSISTENT_RESERVE_IN) { | |
1140 | cmd->execute_cmd = target_scsi3_emulate_pr_in; | |
a85d667e | 1141 | size = get_unaligned_be16(&cdb[7]); |
4ec5bf0e BL |
1142 | return target_cmd_size_check(cmd, size); |
1143 | } | |
1144 | if (cdb[0] == PERSISTENT_RESERVE_OUT) { | |
1145 | cmd->execute_cmd = target_scsi3_emulate_pr_out; | |
388fe699 | 1146 | size = get_unaligned_be32(&cdb[5]); |
4ec5bf0e BL |
1147 | return target_cmd_size_check(cmd, size); |
1148 | } | |
1149 | ||
1150 | if (cdb[0] == RELEASE || cdb[0] == RELEASE_10) { | |
1151 | cmd->execute_cmd = target_scsi2_reservation_release; | |
1152 | if (cdb[0] == RELEASE_10) | |
a85d667e | 1153 | size = get_unaligned_be16(&cdb[7]); |
4ec5bf0e BL |
1154 | else |
1155 | size = cmd->data_length; | |
1156 | return target_cmd_size_check(cmd, size); | |
1157 | } | |
1158 | if (cdb[0] == RESERVE || cdb[0] == RESERVE_10) { | |
1159 | cmd->execute_cmd = target_scsi2_reservation_reserve; | |
1160 | if (cdb[0] == RESERVE_10) | |
a85d667e | 1161 | size = get_unaligned_be16(&cdb[7]); |
4ec5bf0e BL |
1162 | else |
1163 | size = cmd->data_length; | |
1164 | return target_cmd_size_check(cmd, size); | |
1165 | } | |
1166 | } | |
1167 | ||
7bfea53b AG |
1168 | /* Set DATA_CDB flag for ops that should have it */ |
1169 | switch (cdb[0]) { | |
1170 | case READ_6: | |
1171 | case READ_10: | |
1172 | case READ_12: | |
1173 | case READ_16: | |
1174 | case WRITE_6: | |
1175 | case WRITE_10: | |
1176 | case WRITE_12: | |
1177 | case WRITE_16: | |
1178 | case WRITE_VERIFY: | |
1179 | case WRITE_VERIFY_12: | |
3e182db7 | 1180 | case WRITE_VERIFY_16: |
7bfea53b AG |
1181 | case COMPARE_AND_WRITE: |
1182 | case XDWRITEREAD_10: | |
1183 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1184 | break; | |
1185 | case VARIABLE_LENGTH_CMD: | |
1186 | switch (get_unaligned_be16(&cdb[8])) { | |
1187 | case READ_32: | |
1188 | case WRITE_32: | |
e5dc9a70 | 1189 | case WRITE_VERIFY_32: |
7bfea53b AG |
1190 | case XDWRITEREAD_32: |
1191 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | cmd->execute_cmd = exec_cmd; | |
1197 | ||
1198 | return TCM_NO_SENSE; | |
1199 | } | |
1200 | EXPORT_SYMBOL(passthrough_parse_cdb); |