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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_pr.c | |
3 | * | |
4 | * This file contains SPC-3 compliant persistent reservations and | |
5 | * legacy SPC-2 reservations with compatible reservation handling (CRH=1) | |
6 | * | |
7 | * Copyright (c) 2009, 2010 Rising Tide Systems | |
8 | * Copyright (c) 2009, 2010 Linux-iSCSI.org | |
9 | * | |
10 | * Nicholas A. Bellinger <nab@kernel.org> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | * | |
26 | ******************************************************************************/ | |
27 | ||
c66ac9db NB |
28 | #include <linux/slab.h> |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/list.h> | |
31 | #include <scsi/scsi.h> | |
32 | #include <scsi/scsi_cmnd.h> | |
33 | #include <asm/unaligned.h> | |
34 | ||
35 | #include <target/target_core_base.h> | |
c4795fb2 CH |
36 | #include <target/target_core_backend.h> |
37 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
38 | #include <target/target_core_configfs.h> |
39 | ||
e26d99ae | 40 | #include "target_core_internal.h" |
c66ac9db NB |
41 | #include "target_core_pr.h" |
42 | #include "target_core_ua.h" | |
43 | ||
44 | /* | |
45 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) | |
46 | */ | |
47 | struct pr_transport_id_holder { | |
48 | int dest_local_nexus; | |
49 | struct t10_pr_registration *dest_pr_reg; | |
50 | struct se_portal_group *dest_tpg; | |
51 | struct se_node_acl *dest_node_acl; | |
52 | struct se_dev_entry *dest_se_deve; | |
53 | struct list_head dest_list; | |
54 | }; | |
55 | ||
56 | int core_pr_dump_initiator_port( | |
57 | struct t10_pr_registration *pr_reg, | |
58 | char *buf, | |
59 | u32 size) | |
60 | { | |
6708bb27 | 61 | if (!pr_reg->isid_present_at_reg) |
c66ac9db NB |
62 | return 0; |
63 | ||
64 | snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]); | |
65 | return 1; | |
66 | } | |
67 | ||
68 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, | |
69 | struct t10_pr_registration *, int); | |
70 | ||
71 | static int core_scsi2_reservation_seq_non_holder( | |
72 | struct se_cmd *cmd, | |
73 | unsigned char *cdb, | |
74 | u32 pr_reg_type) | |
75 | { | |
76 | switch (cdb[0]) { | |
77 | case INQUIRY: | |
78 | case RELEASE: | |
79 | case RELEASE_10: | |
80 | return 0; | |
81 | default: | |
82 | return 1; | |
83 | } | |
84 | ||
85 | return 1; | |
86 | } | |
87 | ||
88 | static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type) | |
89 | { | |
90 | struct se_device *dev = cmd->se_dev; | |
91 | struct se_session *sess = cmd->se_sess; | |
92 | int ret; | |
93 | ||
6708bb27 | 94 | if (!sess) |
c66ac9db NB |
95 | return 0; |
96 | ||
97 | spin_lock(&dev->dev_reservation_lock); | |
98 | if (!dev->dev_reserved_node_acl || !sess) { | |
99 | spin_unlock(&dev->dev_reservation_lock); | |
100 | return 0; | |
101 | } | |
102 | if (dev->dev_reserved_node_acl != sess->se_node_acl) { | |
103 | spin_unlock(&dev->dev_reservation_lock); | |
e3d6f909 | 104 | return -EINVAL; |
c66ac9db NB |
105 | } |
106 | if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) { | |
107 | spin_unlock(&dev->dev_reservation_lock); | |
108 | return 0; | |
109 | } | |
e3d6f909 | 110 | ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL; |
c66ac9db NB |
111 | spin_unlock(&dev->dev_reservation_lock); |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
eacac00c CH |
116 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
117 | struct se_node_acl *, struct se_session *); | |
118 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
119 | ||
120 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd, int *ret) | |
121 | { | |
122 | struct se_session *se_sess = cmd->se_sess; | |
123 | struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; | |
124 | struct t10_pr_registration *pr_reg; | |
125 | struct t10_reservation *pr_tmpl = &su_dev->t10_pr; | |
126 | int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS); | |
127 | int conflict = 0; | |
128 | ||
129 | if (!crh) | |
130 | return false; | |
131 | ||
132 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, | |
133 | se_sess); | |
134 | if (pr_reg) { | |
135 | /* | |
136 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
137 | * behavior | |
138 | * | |
139 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
140 | * status, but no reservation shall be established and the | |
141 | * persistent reservation shall not be changed, if the command | |
142 | * is received from a) and b) below. | |
143 | * | |
144 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
145 | * status, but the persistent reservation shall not be released, | |
146 | * if the command is received from a) and b) | |
147 | * | |
148 | * a) An I_T nexus that is a persistent reservation holder; or | |
149 | * b) An I_T nexus that is registered if a registrants only or | |
150 | * all registrants type persistent reservation is present. | |
151 | * | |
152 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
153 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
154 | * as defined in SPC-2. | |
155 | */ | |
156 | if (pr_reg->pr_res_holder) { | |
157 | core_scsi3_put_pr_reg(pr_reg); | |
158 | *ret = 0; | |
159 | return false; | |
160 | } | |
161 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
162 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
163 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
164 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
165 | core_scsi3_put_pr_reg(pr_reg); | |
166 | *ret = 0; | |
167 | return true; | |
168 | } | |
169 | core_scsi3_put_pr_reg(pr_reg); | |
170 | conflict = 1; | |
171 | } else { | |
172 | /* | |
173 | * Following spc2r20 5.5.1 Reservations overview: | |
174 | * | |
175 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
176 | * command with the REGISTER or the REGISTER AND IGNORE | |
177 | * EXISTING KEY service action and is still registered by any | |
178 | * initiator, all RESERVE commands and all RELEASE commands | |
179 | * regardless of initiator shall conflict and shall terminate | |
180 | * with a RESERVATION CONFLICT status. | |
181 | */ | |
182 | spin_lock(&pr_tmpl->registration_lock); | |
183 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
184 | spin_unlock(&pr_tmpl->registration_lock); | |
185 | } | |
186 | ||
187 | if (conflict) { | |
188 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
189 | " while active SPC-3 registrations exist," | |
190 | " returning RESERVATION_CONFLICT\n"); | |
03e98c9e | 191 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
eacac00c CH |
192 | return true; |
193 | } | |
194 | ||
195 | return false; | |
196 | } | |
197 | ||
e76a35d6 | 198 | int target_scsi2_reservation_release(struct se_task *task) |
c66ac9db | 199 | { |
e76a35d6 | 200 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
201 | struct se_device *dev = cmd->se_dev; |
202 | struct se_session *sess = cmd->se_sess; | |
203 | struct se_portal_group *tpg = sess->se_tpg; | |
d29a5b6a | 204 | int ret = 0; |
c66ac9db | 205 | |
6708bb27 | 206 | if (!sess || !tpg) |
d29a5b6a | 207 | goto out; |
eacac00c | 208 | if (target_check_scsi2_reservation_conflict(cmd, &ret)) |
d29a5b6a | 209 | goto out; |
c66ac9db | 210 | |
d29a5b6a | 211 | ret = 0; |
c66ac9db | 212 | spin_lock(&dev->dev_reservation_lock); |
d29a5b6a CH |
213 | if (!dev->dev_reserved_node_acl || !sess) |
214 | goto out_unlock; | |
215 | ||
216 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
217 | goto out_unlock; | |
c66ac9db | 218 | |
c66ac9db NB |
219 | dev->dev_reserved_node_acl = NULL; |
220 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; | |
221 | if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { | |
222 | dev->dev_res_bin_isid = 0; | |
223 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; | |
224 | } | |
6708bb27 | 225 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 AG |
226 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
227 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 228 | sess->se_node_acl->initiatorname); |
c66ac9db | 229 | |
d29a5b6a CH |
230 | out_unlock: |
231 | spin_unlock(&dev->dev_reservation_lock); | |
232 | out: | |
233 | if (!ret) { | |
234 | task->task_scsi_status = GOOD; | |
235 | transport_complete_task(task, 1); | |
236 | } | |
237 | return ret; | |
c66ac9db NB |
238 | } |
239 | ||
e76a35d6 | 240 | int target_scsi2_reservation_reserve(struct se_task *task) |
c66ac9db | 241 | { |
e76a35d6 | 242 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
243 | struct se_device *dev = cmd->se_dev; |
244 | struct se_session *sess = cmd->se_sess; | |
245 | struct se_portal_group *tpg = sess->se_tpg; | |
d29a5b6a | 246 | int ret = 0; |
c66ac9db | 247 | |
a1d8b49a AG |
248 | if ((cmd->t_task_cdb[1] & 0x01) && |
249 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 250 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 251 | " ILLEGAL_REQUEST\n"); |
03e98c9e NB |
252 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
253 | ret = -EINVAL; | |
d29a5b6a | 254 | goto out; |
c66ac9db NB |
255 | } |
256 | /* | |
257 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
258 | * ops | |
259 | */ | |
6708bb27 | 260 | if (!sess || !tpg) |
d29a5b6a | 261 | goto out; |
eacac00c | 262 | if (target_check_scsi2_reservation_conflict(cmd, &ret)) |
d29a5b6a | 263 | goto out; |
c66ac9db | 264 | |
d29a5b6a | 265 | ret = 0; |
c66ac9db NB |
266 | spin_lock(&dev->dev_reservation_lock); |
267 | if (dev->dev_reserved_node_acl && | |
268 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 269 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 270 | tpg->se_tpg_tfo->get_fabric_name()); |
6708bb27 | 271 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 272 | cmd->se_lun->unpacked_lun, |
c66ac9db | 273 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 274 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 275 | " from %s \n", cmd->se_lun->unpacked_lun, |
c66ac9db NB |
276 | cmd->se_deve->mapped_lun, |
277 | sess->se_node_acl->initiatorname); | |
03e98c9e NB |
278 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
279 | ret = -EINVAL; | |
d29a5b6a | 280 | goto out_unlock; |
c66ac9db NB |
281 | } |
282 | ||
283 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
284 | dev->dev_flags |= DF_SPC2_RESERVATIONS; | |
285 | if (sess->sess_bin_isid != 0) { | |
286 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
287 | dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; | |
288 | } | |
6708bb27 | 289 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 AG |
290 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
291 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 292 | sess->se_node_acl->initiatorname); |
c66ac9db | 293 | |
d29a5b6a CH |
294 | out_unlock: |
295 | spin_unlock(&dev->dev_reservation_lock); | |
296 | out: | |
297 | if (!ret) { | |
298 | task->task_scsi_status = GOOD; | |
299 | transport_complete_task(task, 1); | |
300 | } | |
301 | return ret; | |
c66ac9db NB |
302 | } |
303 | ||
c66ac9db NB |
304 | |
305 | /* | |
306 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
307 | * | |
308 | * This function is called by those initiator ports who are *NOT* | |
309 | * the active PR reservation holder when a reservation is present. | |
310 | */ | |
311 | static int core_scsi3_pr_seq_non_holder( | |
312 | struct se_cmd *cmd, | |
313 | unsigned char *cdb, | |
314 | u32 pr_reg_type) | |
315 | { | |
316 | struct se_dev_entry *se_deve; | |
e3d6f909 | 317 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
318 | int other_cdb = 0, ignore_reg; |
319 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
320 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
321 | int we = 0; /* Write Exclusive */ | |
322 | int legacy = 0; /* Act like a legacy device and return | |
323 | * RESERVATION CONFLICT on some CDBs */ | |
324 | /* | |
325 | * A legacy SPC-2 reservation is being held. | |
326 | */ | |
327 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) | |
328 | return core_scsi2_reservation_seq_non_holder(cmd, | |
329 | cdb, pr_reg_type); | |
330 | ||
331 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
332 | /* | |
333 | * Determine if the registration should be ignored due to | |
334 | * non-matching ISIDs in core_scsi3_pr_reservation_check(). | |
335 | */ | |
336 | ignore_reg = (pr_reg_type & 0x80000000); | |
337 | if (ignore_reg) | |
338 | pr_reg_type &= ~0x80000000; | |
339 | ||
340 | switch (pr_reg_type) { | |
341 | case PR_TYPE_WRITE_EXCLUSIVE: | |
342 | we = 1; | |
343 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
344 | /* | |
345 | * Some commands are only allowed for the persistent reservation | |
346 | * holder. | |
347 | */ | |
348 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
349 | registered_nexus = 1; | |
350 | break; | |
351 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
352 | we = 1; | |
353 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
354 | /* | |
355 | * Some commands are only allowed for registered I_T Nexuses. | |
356 | */ | |
357 | reg_only = 1; | |
358 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
359 | registered_nexus = 1; | |
360 | break; | |
361 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
362 | we = 1; | |
363 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
364 | /* | |
365 | * Each registered I_T Nexus is a reservation holder. | |
366 | */ | |
367 | all_reg = 1; | |
368 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
369 | registered_nexus = 1; | |
370 | break; | |
371 | default: | |
e3d6f909 | 372 | return -EINVAL; |
c66ac9db NB |
373 | } |
374 | /* | |
375 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
376 | */ | |
377 | switch (cdb[0]) { | |
378 | case SECURITY_PROTOCOL_IN: | |
379 | if (registered_nexus) | |
380 | return 0; | |
381 | ret = (we) ? 0 : 1; | |
382 | break; | |
383 | case MODE_SENSE: | |
384 | case MODE_SENSE_10: | |
385 | case READ_ATTRIBUTE: | |
386 | case READ_BUFFER: | |
387 | case RECEIVE_DIAGNOSTIC: | |
388 | if (legacy) { | |
389 | ret = 1; | |
390 | break; | |
391 | } | |
392 | if (registered_nexus) { | |
393 | ret = 0; | |
394 | break; | |
395 | } | |
396 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
397 | break; | |
398 | case PERSISTENT_RESERVE_OUT: | |
399 | /* | |
400 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
401 | * are allowed in the presence of various reservations. | |
402 | * See spc4r17, table 46 | |
403 | */ | |
404 | switch (cdb[1] & 0x1f) { | |
405 | case PRO_CLEAR: | |
406 | case PRO_PREEMPT: | |
407 | case PRO_PREEMPT_AND_ABORT: | |
408 | ret = (registered_nexus) ? 0 : 1; | |
409 | break; | |
410 | case PRO_REGISTER: | |
411 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
412 | ret = 0; | |
413 | break; | |
414 | case PRO_REGISTER_AND_MOVE: | |
415 | case PRO_RESERVE: | |
416 | ret = 1; | |
417 | break; | |
418 | case PRO_RELEASE: | |
419 | ret = (registered_nexus) ? 0 : 1; | |
420 | break; | |
421 | default: | |
6708bb27 | 422 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 423 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 424 | return -EINVAL; |
c66ac9db NB |
425 | } |
426 | break; | |
427 | case RELEASE: | |
428 | case RELEASE_10: | |
eacac00c | 429 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
430 | ret = 0; |
431 | break; | |
432 | case RESERVE: | |
433 | case RESERVE_10: | |
eacac00c | 434 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
435 | ret = 0; |
436 | break; | |
437 | case TEST_UNIT_READY: | |
438 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
439 | break; | |
440 | case MAINTENANCE_IN: | |
441 | switch (cdb[1] & 0x1f) { | |
442 | case MI_MANAGEMENT_PROTOCOL_IN: | |
443 | if (registered_nexus) { | |
444 | ret = 0; | |
445 | break; | |
446 | } | |
447 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
448 | break; | |
449 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
450 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
451 | if (legacy) { | |
452 | ret = 1; | |
453 | break; | |
454 | } | |
455 | if (registered_nexus) { | |
456 | ret = 0; | |
457 | break; | |
458 | } | |
459 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
460 | break; | |
461 | case MI_REPORT_ALIASES: | |
462 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
463 | case MI_REPORT_PRIORITY: | |
464 | case MI_REPORT_TARGET_PGS: | |
465 | case MI_REPORT_TIMESTAMP: | |
466 | ret = 0; /* Allowed */ | |
467 | break; | |
468 | default: | |
6708bb27 | 469 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 470 | (cdb[1] & 0x1f)); |
e3d6f909 | 471 | return -EINVAL; |
c66ac9db NB |
472 | } |
473 | break; | |
474 | case ACCESS_CONTROL_IN: | |
475 | case ACCESS_CONTROL_OUT: | |
476 | case INQUIRY: | |
477 | case LOG_SENSE: | |
478 | case READ_MEDIA_SERIAL_NUMBER: | |
479 | case REPORT_LUNS: | |
480 | case REQUEST_SENSE: | |
481 | ret = 0; /*/ Allowed CDBs */ | |
482 | break; | |
483 | default: | |
484 | other_cdb = 1; | |
485 | break; | |
486 | } | |
487 | /* | |
25985edc | 488 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
489 | * statement. |
490 | */ | |
6708bb27 | 491 | if (!ret && !other_cdb) { |
c66ac9db | 492 | #if 0 |
6708bb27 | 493 | pr_debug("Allowing explict CDB: 0x%02x for %s" |
c66ac9db NB |
494 | " reservation holder\n", cdb[0], |
495 | core_scsi3_pr_dump_type(pr_reg_type)); | |
496 | #endif | |
497 | return ret; | |
498 | } | |
499 | /* | |
500 | * Check if write exclusive initiator ports *NOT* holding the | |
501 | * WRITE_EXCLUSIVE_* reservation. | |
502 | */ | |
503 | if ((we) && !(registered_nexus)) { | |
504 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
505 | /* | |
506 | * Conflict for write exclusive | |
507 | */ | |
6708bb27 | 508 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
509 | " %s CDB: 0x%02x to %s reservation\n", |
510 | transport_dump_cmd_direction(cmd), | |
511 | se_sess->se_node_acl->initiatorname, cdb[0], | |
512 | core_scsi3_pr_dump_type(pr_reg_type)); | |
513 | return 1; | |
514 | } else { | |
515 | /* | |
516 | * Allow non WRITE CDBs for all Write Exclusive | |
517 | * PR TYPEs to pass for registered and | |
518 | * non-registered_nexuxes NOT holding the reservation. | |
519 | * | |
520 | * We only make noise for the unregisterd nexuses, | |
521 | * as we expect registered non-reservation holding | |
522 | * nexuses to issue CDBs. | |
523 | */ | |
524 | #if 0 | |
6708bb27 AG |
525 | if (!registered_nexus) { |
526 | pr_debug("Allowing implict CDB: 0x%02x" | |
c66ac9db NB |
527 | " for %s reservation on unregistered" |
528 | " nexus\n", cdb[0], | |
529 | core_scsi3_pr_dump_type(pr_reg_type)); | |
530 | } | |
531 | #endif | |
532 | return 0; | |
533 | } | |
534 | } else if ((reg_only) || (all_reg)) { | |
535 | if (registered_nexus) { | |
536 | /* | |
537 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
538 | * allow commands from registered nexuses. | |
539 | */ | |
540 | #if 0 | |
6708bb27 | 541 | pr_debug("Allowing implict CDB: 0x%02x for %s" |
c66ac9db NB |
542 | " reservation\n", cdb[0], |
543 | core_scsi3_pr_dump_type(pr_reg_type)); | |
544 | #endif | |
545 | return 0; | |
546 | } | |
547 | } | |
6708bb27 | 548 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
549 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
550 | (registered_nexus) ? "" : "un", | |
551 | se_sess->se_node_acl->initiatorname, cdb[0], | |
552 | core_scsi3_pr_dump_type(pr_reg_type)); | |
553 | ||
554 | return 1; /* Conflict by default */ | |
555 | } | |
556 | ||
557 | static u32 core_scsi3_pr_generation(struct se_device *dev) | |
558 | { | |
e3d6f909 | 559 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
560 | u32 prg; |
561 | /* | |
562 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
563 | * counter mainted by the device server. | |
564 | * | |
565 | * Note that this is done regardless of Active Persist across | |
566 | * Target PowerLoss (APTPL) | |
567 | * | |
568 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
569 | */ | |
570 | spin_lock(&dev->dev_reservation_lock); | |
e3d6f909 | 571 | prg = su_dev->t10_pr.pr_generation++; |
c66ac9db NB |
572 | spin_unlock(&dev->dev_reservation_lock); |
573 | ||
574 | return prg; | |
575 | } | |
576 | ||
577 | static int core_scsi3_pr_reservation_check( | |
578 | struct se_cmd *cmd, | |
579 | u32 *pr_reg_type) | |
580 | { | |
581 | struct se_device *dev = cmd->se_dev; | |
582 | struct se_session *sess = cmd->se_sess; | |
583 | int ret; | |
584 | ||
6708bb27 | 585 | if (!sess) |
c66ac9db NB |
586 | return 0; |
587 | /* | |
588 | * A legacy SPC-2 reservation is being held. | |
589 | */ | |
590 | if (dev->dev_flags & DF_SPC2_RESERVATIONS) | |
591 | return core_scsi2_reservation_check(cmd, pr_reg_type); | |
592 | ||
593 | spin_lock(&dev->dev_reservation_lock); | |
6708bb27 | 594 | if (!dev->dev_pr_res_holder) { |
c66ac9db NB |
595 | spin_unlock(&dev->dev_reservation_lock); |
596 | return 0; | |
597 | } | |
598 | *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
599 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
600 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { | |
601 | spin_unlock(&dev->dev_reservation_lock); | |
e3d6f909 | 602 | return -EINVAL; |
c66ac9db | 603 | } |
6708bb27 | 604 | if (!dev->dev_pr_res_holder->isid_present_at_reg) { |
c66ac9db NB |
605 | spin_unlock(&dev->dev_reservation_lock); |
606 | return 0; | |
607 | } | |
608 | ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == | |
e3d6f909 | 609 | sess->sess_bin_isid) ? 0 : -EINVAL; |
c66ac9db NB |
610 | /* |
611 | * Use bit in *pr_reg_type to notify ISID mismatch in | |
612 | * core_scsi3_pr_seq_non_holder(). | |
613 | */ | |
614 | if (ret != 0) | |
615 | *pr_reg_type |= 0x80000000; | |
616 | spin_unlock(&dev->dev_reservation_lock); | |
617 | ||
618 | return ret; | |
619 | } | |
620 | ||
621 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( | |
622 | struct se_device *dev, | |
623 | struct se_node_acl *nacl, | |
624 | struct se_dev_entry *deve, | |
625 | unsigned char *isid, | |
626 | u64 sa_res_key, | |
627 | int all_tg_pt, | |
628 | int aptpl) | |
629 | { | |
e3d6f909 | 630 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
631 | struct t10_pr_registration *pr_reg; |
632 | ||
633 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
634 | if (!pr_reg) { |
635 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
636 | return NULL; |
637 | } | |
638 | ||
e3d6f909 | 639 | pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len, |
c66ac9db | 640 | GFP_ATOMIC); |
6708bb27 AG |
641 | if (!pr_reg->pr_aptpl_buf) { |
642 | pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); | |
c66ac9db NB |
643 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
644 | return NULL; | |
645 | } | |
646 | ||
647 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
648 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
649 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
650 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
651 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
652 | atomic_set(&pr_reg->pr_res_holders, 0); | |
653 | pr_reg->pr_reg_nacl = nacl; | |
654 | pr_reg->pr_reg_deve = deve; | |
655 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
656 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
657 | pr_reg->pr_res_key = sa_res_key; | |
658 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
659 | pr_reg->pr_reg_aptpl = aptpl; | |
660 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
661 | /* | |
662 | * If an ISID value for this SCSI Initiator Port exists, | |
663 | * save it to the registration now. | |
664 | */ | |
665 | if (isid != NULL) { | |
666 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
667 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
668 | pr_reg->isid_present_at_reg = 1; | |
669 | } | |
670 | ||
671 | return pr_reg; | |
672 | } | |
673 | ||
674 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
675 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
676 | ||
677 | /* | |
678 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
679 | * modes. | |
680 | */ | |
681 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
682 | struct se_device *dev, | |
683 | struct se_node_acl *nacl, | |
684 | struct se_dev_entry *deve, | |
685 | unsigned char *isid, | |
686 | u64 sa_res_key, | |
687 | int all_tg_pt, | |
688 | int aptpl) | |
689 | { | |
690 | struct se_dev_entry *deve_tmp; | |
691 | struct se_node_acl *nacl_tmp; | |
692 | struct se_port *port, *port_tmp; | |
693 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
694 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; | |
695 | int ret; | |
696 | /* | |
697 | * Create a registration for the I_T Nexus upon which the | |
698 | * PROUT REGISTER was received. | |
699 | */ | |
700 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
701 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 702 | if (!pr_reg) |
c66ac9db NB |
703 | return NULL; |
704 | /* | |
705 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
706 | */ | |
6708bb27 | 707 | if (!all_tg_pt) |
c66ac9db NB |
708 | return pr_reg; |
709 | /* | |
710 | * Create list of matching SCSI Initiator Port registrations | |
711 | * for ALL_TG_PT=1 | |
712 | */ | |
713 | spin_lock(&dev->se_port_lock); | |
714 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
715 | atomic_inc(&port->sep_tg_pt_ref_cnt); | |
716 | smp_mb__after_atomic_inc(); | |
717 | spin_unlock(&dev->se_port_lock); | |
718 | ||
719 | spin_lock_bh(&port->sep_alua_lock); | |
720 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
721 | alua_port_list) { | |
722 | /* | |
723 | * This pointer will be NULL for demo mode MappedLUNs | |
724 | * that have not been make explict via a ConfigFS | |
725 | * MappedLUN group for the SCSI Initiator Node ACL. | |
726 | */ | |
6708bb27 | 727 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
728 | continue; |
729 | ||
730 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
731 | /* | |
732 | * Skip the matching struct se_node_acl that is allocated | |
733 | * above.. | |
734 | */ | |
735 | if (nacl == nacl_tmp) | |
736 | continue; | |
737 | /* | |
738 | * Only perform PR registrations for target ports on | |
739 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
740 | * arrived. | |
741 | */ | |
742 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
743 | continue; | |
744 | /* | |
745 | * Look for a matching Initiator Node ACL in ASCII format | |
746 | */ | |
747 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
748 | continue; | |
749 | ||
750 | atomic_inc(&deve_tmp->pr_ref_count); | |
751 | smp_mb__after_atomic_inc(); | |
752 | spin_unlock_bh(&port->sep_alua_lock); | |
753 | /* | |
754 | * Grab a configfs group dependency that is released | |
755 | * for the exception path at label out: below, or upon | |
756 | * completion of adding ALL_TG_PT=1 registrations in | |
757 | * __core_scsi3_add_registration() | |
758 | */ | |
759 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
760 | if (ret < 0) { | |
6708bb27 | 761 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db NB |
762 | "_item() failed\n"); |
763 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
764 | smp_mb__after_atomic_dec(); | |
765 | atomic_dec(&deve_tmp->pr_ref_count); | |
766 | smp_mb__after_atomic_dec(); | |
767 | goto out; | |
768 | } | |
769 | /* | |
770 | * Located a matching SCSI Initiator Port on a different | |
771 | * port, allocate the pr_reg_atp and attach it to the | |
772 | * pr_reg->pr_reg_atp_list that will be processed once | |
773 | * the original *pr_reg is processed in | |
774 | * __core_scsi3_add_registration() | |
775 | */ | |
776 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
777 | nacl_tmp, deve_tmp, NULL, | |
778 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 779 | if (!pr_reg_atp) { |
c66ac9db NB |
780 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
781 | smp_mb__after_atomic_dec(); | |
782 | atomic_dec(&deve_tmp->pr_ref_count); | |
783 | smp_mb__after_atomic_dec(); | |
784 | core_scsi3_lunacl_undepend_item(deve_tmp); | |
785 | goto out; | |
786 | } | |
787 | ||
788 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
789 | &pr_reg->pr_reg_atp_list); | |
790 | spin_lock_bh(&port->sep_alua_lock); | |
791 | } | |
792 | spin_unlock_bh(&port->sep_alua_lock); | |
793 | ||
794 | spin_lock(&dev->se_port_lock); | |
795 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
796 | smp_mb__after_atomic_dec(); | |
797 | } | |
798 | spin_unlock(&dev->se_port_lock); | |
799 | ||
800 | return pr_reg; | |
801 | out: | |
802 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
803 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
804 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
805 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
806 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
807 | } | |
808 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
809 | return NULL; | |
810 | } | |
811 | ||
812 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 813 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
814 | u64 sa_res_key, |
815 | unsigned char *i_port, | |
816 | unsigned char *isid, | |
817 | u32 mapped_lun, | |
818 | unsigned char *t_port, | |
819 | u16 tpgt, | |
820 | u32 target_lun, | |
821 | int res_holder, | |
822 | int all_tg_pt, | |
823 | u8 type) | |
824 | { | |
825 | struct t10_pr_registration *pr_reg; | |
826 | ||
6708bb27 AG |
827 | if (!i_port || !t_port || !sa_res_key) { |
828 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 829 | return -EINVAL; |
c66ac9db NB |
830 | } |
831 | ||
832 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
833 | if (!pr_reg) { |
834 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 835 | return -ENOMEM; |
c66ac9db NB |
836 | } |
837 | pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); | |
838 | ||
839 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
840 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
841 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
842 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
843 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
844 | atomic_set(&pr_reg->pr_res_holders, 0); | |
845 | pr_reg->pr_reg_nacl = NULL; | |
846 | pr_reg->pr_reg_deve = NULL; | |
847 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
848 | pr_reg->pr_aptpl_target_lun = target_lun; | |
849 | pr_reg->pr_res_key = sa_res_key; | |
850 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
851 | pr_reg->pr_reg_aptpl = 1; | |
852 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
853 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
854 | pr_reg->pr_res_type = type; | |
855 | /* | |
856 | * If an ISID value had been saved in APTPL metadata for this | |
857 | * SCSI Initiator Port, restore it now. | |
858 | */ | |
859 | if (isid != NULL) { | |
860 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
861 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
862 | pr_reg->isid_present_at_reg = 1; | |
863 | } | |
864 | /* | |
865 | * Copy the i_port and t_port information from caller. | |
866 | */ | |
867 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
868 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
869 | pr_reg->pr_reg_tpgt = tpgt; | |
870 | /* | |
871 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
872 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
873 | * the Initiator Node LUN ACL from the fabric module is created for | |
874 | * this registration. | |
875 | */ | |
876 | pr_reg->pr_res_holder = res_holder; | |
877 | ||
878 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 879 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
880 | " metadata\n", (res_holder) ? "+reservation" : ""); |
881 | return 0; | |
882 | } | |
883 | ||
884 | static void core_scsi3_aptpl_reserve( | |
885 | struct se_device *dev, | |
886 | struct se_portal_group *tpg, | |
887 | struct se_node_acl *node_acl, | |
888 | struct t10_pr_registration *pr_reg) | |
889 | { | |
890 | char i_buf[PR_REG_ISID_ID_LEN]; | |
891 | int prf_isid; | |
892 | ||
893 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
894 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
895 | PR_REG_ISID_ID_LEN); | |
896 | ||
897 | spin_lock(&dev->dev_reservation_lock); | |
898 | dev->dev_pr_res_holder = pr_reg; | |
899 | spin_unlock(&dev->dev_reservation_lock); | |
900 | ||
6708bb27 | 901 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 902 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 903 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
904 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
905 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 906 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 907 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
c66ac9db NB |
908 | (prf_isid) ? &i_buf[0] : ""); |
909 | } | |
910 | ||
911 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
912 | struct t10_pr_registration *, int, int); | |
913 | ||
914 | static int __core_scsi3_check_aptpl_registration( | |
915 | struct se_device *dev, | |
916 | struct se_portal_group *tpg, | |
917 | struct se_lun *lun, | |
918 | u32 target_lun, | |
919 | struct se_node_acl *nacl, | |
920 | struct se_dev_entry *deve) | |
921 | { | |
922 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 923 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
924 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
925 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
926 | u16 tpgt; | |
927 | ||
928 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
929 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
930 | /* | |
931 | * Copy Initiator Port information from struct se_node_acl | |
932 | */ | |
933 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
934 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
935 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
936 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
937 | /* |
938 | * Look for the matching registrations+reservation from those | |
939 | * created from APTPL metadata. Note that multiple registrations | |
940 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
941 | * TransportIDs. | |
942 | */ | |
943 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
944 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
945 | pr_reg_aptpl_list) { | |
6708bb27 | 946 | if (!strcmp(pr_reg->pr_iport, i_port) && |
c66ac9db NB |
947 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
948 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
949 | (pr_reg->pr_reg_tpgt == tpgt) && | |
950 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
951 | ||
952 | pr_reg->pr_reg_nacl = nacl; | |
953 | pr_reg->pr_reg_deve = deve; | |
954 | pr_reg->pr_reg_tg_pt_lun = lun; | |
955 | ||
956 | list_del(&pr_reg->pr_reg_aptpl_list); | |
957 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
958 | /* | |
959 | * At this point all of the pointers in *pr_reg will | |
960 | * be setup, so go ahead and add the registration. | |
961 | */ | |
962 | ||
963 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
964 | /* | |
965 | * If this registration is the reservation holder, | |
966 | * make that happen now.. | |
967 | */ | |
968 | if (pr_reg->pr_res_holder) | |
969 | core_scsi3_aptpl_reserve(dev, tpg, | |
970 | nacl, pr_reg); | |
971 | /* | |
972 | * Reenable pr_aptpl_active to accept new metadata | |
973 | * updates once the SCSI device is active again.. | |
974 | */ | |
975 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
976 | pr_tmpl->pr_aptpl_active = 1; | |
977 | } | |
978 | } | |
979 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
984 | int core_scsi3_check_aptpl_registration( | |
985 | struct se_device *dev, | |
986 | struct se_portal_group *tpg, | |
987 | struct se_lun *lun, | |
988 | struct se_lun_acl *lun_acl) | |
989 | { | |
e3d6f909 | 990 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
991 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; |
992 | struct se_dev_entry *deve = &nacl->device_list[lun_acl->mapped_lun]; | |
993 | ||
e3d6f909 | 994 | if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) |
c66ac9db NB |
995 | return 0; |
996 | ||
997 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
998 | lun->unpacked_lun, nacl, deve); | |
999 | } | |
1000 | ||
1001 | static void __core_scsi3_dump_registration( | |
1002 | struct target_core_fabric_ops *tfo, | |
1003 | struct se_device *dev, | |
1004 | struct se_node_acl *nacl, | |
1005 | struct t10_pr_registration *pr_reg, | |
1006 | int register_type) | |
1007 | { | |
1008 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1009 | char i_buf[PR_REG_ISID_ID_LEN]; | |
1010 | int prf_isid; | |
1011 | ||
1012 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
1013 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1014 | PR_REG_ISID_ID_LEN); | |
1015 | ||
6708bb27 | 1016 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
c66ac9db NB |
1017 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? |
1018 | "_AND_MOVE" : (register_type == 1) ? | |
1019 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, | |
1020 | (prf_isid) ? i_buf : ""); | |
6708bb27 | 1021 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
1022 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1023 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1024 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1025 | " Port(s)\n", tfo->get_fabric_name(), |
1026 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1027 | dev->transport->name); |
6708bb27 | 1028 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1029 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1030 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1031 | pr_reg->pr_reg_aptpl); | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * this function can be called with struct se_device->dev_reservation_lock | |
1036 | * when register_move = 1 | |
1037 | */ | |
1038 | static void __core_scsi3_add_registration( | |
1039 | struct se_device *dev, | |
1040 | struct se_node_acl *nacl, | |
1041 | struct t10_pr_registration *pr_reg, | |
1042 | int register_type, | |
1043 | int register_move) | |
1044 | { | |
e3d6f909 | 1045 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1046 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
1047 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
e3d6f909 | 1048 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1049 | |
1050 | /* | |
1051 | * Increment PRgeneration counter for struct se_device upon a successful | |
1052 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1053 | * | |
1054 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1055 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1056 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1057 | * for the REGISTER. | |
1058 | */ | |
1059 | pr_reg->pr_res_generation = (register_move) ? | |
e3d6f909 | 1060 | su_dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1061 | core_scsi3_pr_generation(dev); |
1062 | ||
1063 | spin_lock(&pr_tmpl->registration_lock); | |
1064 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1065 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1066 | ||
1067 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1068 | spin_unlock(&pr_tmpl->registration_lock); | |
1069 | /* | |
1070 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1071 | */ | |
6708bb27 | 1072 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1073 | return; |
1074 | /* | |
1075 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1076 | * allocated in __core_scsi3_alloc_registration() | |
1077 | */ | |
1078 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1079 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1080 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1081 | ||
1082 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1083 | ||
1084 | spin_lock(&pr_tmpl->registration_lock); | |
1085 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1086 | &pr_tmpl->registration_list); | |
1087 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1088 | ||
1089 | __core_scsi3_dump_registration(tfo, dev, | |
1090 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1091 | register_type); | |
1092 | spin_unlock(&pr_tmpl->registration_lock); | |
1093 | /* | |
1094 | * Drop configfs group dependency reference from | |
1095 | * __core_scsi3_alloc_registration() | |
1096 | */ | |
1097 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | static int core_scsi3_alloc_registration( | |
1102 | struct se_device *dev, | |
1103 | struct se_node_acl *nacl, | |
1104 | struct se_dev_entry *deve, | |
1105 | unsigned char *isid, | |
1106 | u64 sa_res_key, | |
1107 | int all_tg_pt, | |
1108 | int aptpl, | |
1109 | int register_type, | |
1110 | int register_move) | |
1111 | { | |
1112 | struct t10_pr_registration *pr_reg; | |
1113 | ||
1114 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1115 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1116 | if (!pr_reg) |
e3d6f909 | 1117 | return -EPERM; |
c66ac9db NB |
1118 | |
1119 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1120 | register_type, register_move); | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1125 | struct se_device *dev, | |
1126 | struct se_node_acl *nacl, | |
1127 | unsigned char *isid) | |
1128 | { | |
e3d6f909 | 1129 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1130 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1131 | struct se_portal_group *tpg; | |
1132 | ||
1133 | spin_lock(&pr_tmpl->registration_lock); | |
1134 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1135 | &pr_tmpl->registration_list, pr_reg_list) { | |
1136 | /* | |
1137 | * First look for a matching struct se_node_acl | |
1138 | */ | |
1139 | if (pr_reg->pr_reg_nacl != nacl) | |
1140 | continue; | |
1141 | ||
1142 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1143 | /* | |
1144 | * If this registration does NOT contain a fabric provided | |
1145 | * ISID, then we have found a match. | |
1146 | */ | |
6708bb27 | 1147 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1148 | /* |
1149 | * Determine if this SCSI device server requires that | |
1150 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1151 | * for fabric modules (iSCSI) requiring them. | |
1152 | */ | |
e3d6f909 AG |
1153 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
1154 | if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) | |
c66ac9db NB |
1155 | continue; |
1156 | } | |
1157 | atomic_inc(&pr_reg->pr_res_holders); | |
1158 | smp_mb__after_atomic_inc(); | |
1159 | spin_unlock(&pr_tmpl->registration_lock); | |
1160 | return pr_reg; | |
1161 | } | |
1162 | /* | |
1163 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1164 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1165 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1166 | */ | |
6708bb27 | 1167 | if (!isid) |
c66ac9db NB |
1168 | continue; |
1169 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1170 | continue; | |
1171 | ||
1172 | atomic_inc(&pr_reg->pr_res_holders); | |
1173 | smp_mb__after_atomic_inc(); | |
1174 | spin_unlock(&pr_tmpl->registration_lock); | |
1175 | return pr_reg; | |
1176 | } | |
1177 | spin_unlock(&pr_tmpl->registration_lock); | |
1178 | ||
1179 | return NULL; | |
1180 | } | |
1181 | ||
1182 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1183 | struct se_device *dev, | |
1184 | struct se_node_acl *nacl, | |
1185 | struct se_session *sess) | |
1186 | { | |
1187 | struct se_portal_group *tpg = nacl->se_tpg; | |
1188 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1189 | ||
e3d6f909 | 1190 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1191 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1192 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1193 | PR_REG_ISID_LEN); |
1194 | isid_ptr = &buf[0]; | |
1195 | } | |
1196 | ||
1197 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1198 | } | |
1199 | ||
1200 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1201 | { | |
1202 | atomic_dec(&pr_reg->pr_res_holders); | |
1203 | smp_mb__after_atomic_dec(); | |
1204 | } | |
1205 | ||
1206 | static int core_scsi3_check_implict_release( | |
1207 | struct se_device *dev, | |
1208 | struct t10_pr_registration *pr_reg) | |
1209 | { | |
1210 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1211 | struct t10_pr_registration *pr_res_holder; | |
1212 | int ret = 0; | |
1213 | ||
1214 | spin_lock(&dev->dev_reservation_lock); | |
1215 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1216 | if (!pr_res_holder) { |
c66ac9db NB |
1217 | spin_unlock(&dev->dev_reservation_lock); |
1218 | return ret; | |
1219 | } | |
1220 | if (pr_res_holder == pr_reg) { | |
1221 | /* | |
1222 | * Perform an implict RELEASE if the registration that | |
1223 | * is being released is holding the reservation. | |
1224 | * | |
1225 | * From spc4r17, section 5.7.11.1: | |
1226 | * | |
1227 | * e) If the I_T nexus is the persistent reservation holder | |
1228 | * and the persistent reservation is not an all registrants | |
1229 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1230 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1231 | * service action with the SERVICE ACTION RESERVATION KEY | |
1232 | * field set to zero (see 5.7.11.3). | |
1233 | */ | |
1234 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); | |
1235 | ret = 1; | |
1236 | /* | |
1237 | * For 'All Registrants' reservation types, all existing | |
1238 | * registrations are still processed as reservation holders | |
1239 | * in core_scsi3_pr_seq_non_holder() after the initial | |
1240 | * reservation holder is implictly released here. | |
1241 | */ | |
1242 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1243 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1244 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1245 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1246 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1247 | " UNREGISTER while existing reservation with matching" |
1248 | " key 0x%016Lx is present from another SCSI Initiator" | |
1249 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1250 | ret = -EPERM; |
c66ac9db NB |
1251 | } |
1252 | spin_unlock(&dev->dev_reservation_lock); | |
1253 | ||
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | /* | |
e3d6f909 | 1258 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1259 | */ |
1260 | static void __core_scsi3_free_registration( | |
1261 | struct se_device *dev, | |
1262 | struct t10_pr_registration *pr_reg, | |
1263 | struct list_head *preempt_and_abort_list, | |
1264 | int dec_holders) | |
1265 | { | |
1266 | struct target_core_fabric_ops *tfo = | |
1267 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; | |
e3d6f909 | 1268 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1269 | char i_buf[PR_REG_ISID_ID_LEN]; |
1270 | int prf_isid; | |
1271 | ||
1272 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1273 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1274 | PR_REG_ISID_ID_LEN); | |
1275 | ||
1276 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1277 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
1278 | list_del(&pr_reg->pr_reg_list); | |
1279 | /* | |
1280 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1281 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1282 | */ | |
1283 | if (dec_holders) | |
1284 | core_scsi3_put_pr_reg(pr_reg); | |
1285 | /* | |
1286 | * Wait until all reference from any other I_T nexuses for this | |
1287 | * *pr_reg have been released. Because list_del() is called above, | |
1288 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1289 | * count back to zero, and we release *pr_reg. | |
1290 | */ | |
1291 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1292 | spin_unlock(&pr_tmpl->registration_lock); | |
6708bb27 | 1293 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1294 | tfo->get_fabric_name()); |
1295 | cpu_relax(); | |
1296 | spin_lock(&pr_tmpl->registration_lock); | |
1297 | } | |
1298 | ||
6708bb27 | 1299 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1300 | " Node: %s%s\n", tfo->get_fabric_name(), |
1301 | pr_reg->pr_reg_nacl->initiatorname, | |
1302 | (prf_isid) ? &i_buf[0] : ""); | |
6708bb27 | 1303 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1304 | " Port(s)\n", tfo->get_fabric_name(), |
1305 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1306 | dev->transport->name); |
6708bb27 | 1307 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1308 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1309 | pr_reg->pr_res_generation); | |
1310 | ||
6708bb27 | 1311 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1312 | pr_reg->pr_reg_deve = NULL; |
1313 | pr_reg->pr_reg_nacl = NULL; | |
1314 | kfree(pr_reg->pr_aptpl_buf); | |
1315 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1316 | return; | |
1317 | } | |
1318 | /* | |
1319 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1320 | * are released once the ABORT_TASK_SET has completed.. | |
1321 | */ | |
1322 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1323 | } | |
1324 | ||
1325 | void core_scsi3_free_pr_reg_from_nacl( | |
1326 | struct se_device *dev, | |
1327 | struct se_node_acl *nacl) | |
1328 | { | |
e3d6f909 | 1329 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1330 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1331 | /* | |
1332 | * If the passed se_node_acl matches the reservation holder, | |
1333 | * release the reservation. | |
1334 | */ | |
1335 | spin_lock(&dev->dev_reservation_lock); | |
1336 | pr_res_holder = dev->dev_pr_res_holder; | |
1337 | if ((pr_res_holder != NULL) && | |
1338 | (pr_res_holder->pr_reg_nacl == nacl)) | |
1339 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); | |
1340 | spin_unlock(&dev->dev_reservation_lock); | |
1341 | /* | |
1342 | * Release any registration associated with the struct se_node_acl. | |
1343 | */ | |
1344 | spin_lock(&pr_tmpl->registration_lock); | |
1345 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1346 | &pr_tmpl->registration_list, pr_reg_list) { | |
1347 | ||
1348 | if (pr_reg->pr_reg_nacl != nacl) | |
1349 | continue; | |
1350 | ||
1351 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1352 | } | |
1353 | spin_unlock(&pr_tmpl->registration_lock); | |
1354 | } | |
1355 | ||
1356 | void core_scsi3_free_all_registrations( | |
1357 | struct se_device *dev) | |
1358 | { | |
e3d6f909 | 1359 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1360 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1361 | ||
1362 | spin_lock(&dev->dev_reservation_lock); | |
1363 | pr_res_holder = dev->dev_pr_res_holder; | |
1364 | if (pr_res_holder != NULL) { | |
1365 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1366 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
1367 | pr_res_holder, 0); | |
1368 | } | |
1369 | spin_unlock(&dev->dev_reservation_lock); | |
1370 | ||
1371 | spin_lock(&pr_tmpl->registration_lock); | |
1372 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1373 | &pr_tmpl->registration_list, pr_reg_list) { | |
1374 | ||
1375 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1376 | } | |
1377 | spin_unlock(&pr_tmpl->registration_lock); | |
1378 | ||
1379 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1380 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1381 | pr_reg_aptpl_list) { | |
1382 | list_del(&pr_reg->pr_reg_aptpl_list); | |
1383 | kfree(pr_reg->pr_aptpl_buf); | |
1384 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1385 | } | |
1386 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1387 | } | |
1388 | ||
1389 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1390 | { | |
e3d6f909 | 1391 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1392 | &tpg->tpg_group.cg_item); |
1393 | } | |
1394 | ||
1395 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1396 | { | |
e3d6f909 | 1397 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1398 | &tpg->tpg_group.cg_item); |
1399 | ||
1400 | atomic_dec(&tpg->tpg_pr_ref_count); | |
1401 | smp_mb__after_atomic_dec(); | |
1402 | } | |
1403 | ||
1404 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1405 | { | |
1406 | struct se_portal_group *tpg = nacl->se_tpg; | |
1407 | ||
1408 | if (nacl->dynamic_node_acl) | |
1409 | return 0; | |
1410 | ||
e3d6f909 | 1411 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1412 | &nacl->acl_group.cg_item); |
1413 | } | |
1414 | ||
1415 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1416 | { | |
1417 | struct se_portal_group *tpg = nacl->se_tpg; | |
1418 | ||
1419 | if (nacl->dynamic_node_acl) { | |
1420 | atomic_dec(&nacl->acl_pr_ref_count); | |
1421 | smp_mb__after_atomic_dec(); | |
1422 | return; | |
1423 | } | |
1424 | ||
e3d6f909 | 1425 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1426 | &nacl->acl_group.cg_item); |
1427 | ||
1428 | atomic_dec(&nacl->acl_pr_ref_count); | |
1429 | smp_mb__after_atomic_dec(); | |
1430 | } | |
1431 | ||
1432 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1433 | { | |
1434 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1435 | struct se_node_acl *nacl; | |
1436 | struct se_portal_group *tpg; | |
1437 | /* | |
1438 | * For nacl->dynamic_node_acl=1 | |
1439 | */ | |
6708bb27 | 1440 | if (!lun_acl) |
c66ac9db NB |
1441 | return 0; |
1442 | ||
1443 | nacl = lun_acl->se_lun_nacl; | |
1444 | tpg = nacl->se_tpg; | |
1445 | ||
e3d6f909 | 1446 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1447 | &lun_acl->se_lun_group.cg_item); |
1448 | } | |
1449 | ||
1450 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1451 | { | |
1452 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1453 | struct se_node_acl *nacl; | |
1454 | struct se_portal_group *tpg; | |
1455 | /* | |
1456 | * For nacl->dynamic_node_acl=1 | |
1457 | */ | |
6708bb27 | 1458 | if (!lun_acl) { |
c66ac9db NB |
1459 | atomic_dec(&se_deve->pr_ref_count); |
1460 | smp_mb__after_atomic_dec(); | |
1461 | return; | |
1462 | } | |
1463 | nacl = lun_acl->se_lun_nacl; | |
1464 | tpg = nacl->se_tpg; | |
1465 | ||
e3d6f909 | 1466 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1467 | &lun_acl->se_lun_group.cg_item); |
1468 | ||
1469 | atomic_dec(&se_deve->pr_ref_count); | |
1470 | smp_mb__after_atomic_dec(); | |
1471 | } | |
1472 | ||
1473 | static int core_scsi3_decode_spec_i_port( | |
1474 | struct se_cmd *cmd, | |
1475 | struct se_portal_group *tpg, | |
1476 | unsigned char *l_isid, | |
1477 | u64 sa_res_key, | |
1478 | int all_tg_pt, | |
1479 | int aptpl) | |
1480 | { | |
5951146d | 1481 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1482 | struct se_port *tmp_port; |
1483 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1484 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
1485 | struct se_node_acl *dest_node_acl = NULL; |
1486 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1487 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1488 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
1489 | struct list_head tid_dest_list; | |
1490 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; | |
1491 | struct target_core_fabric_ops *tmp_tf_ops; | |
05d1c7c0 | 1492 | unsigned char *buf; |
c66ac9db NB |
1493 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; |
1494 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
1495 | u32 tpdl, tid_len = 0; | |
1496 | int ret, dest_local_nexus, prf_isid; | |
1497 | u32 dest_rtpi = 0; | |
1498 | ||
1499 | memset(dest_iport, 0, 64); | |
1500 | INIT_LIST_HEAD(&tid_dest_list); | |
1501 | ||
1502 | local_se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
1503 | /* | |
1504 | * Allocate a struct pr_transport_id_holder and setup the | |
1505 | * local_node_acl and local_se_deve pointers and add to | |
1506 | * struct list_head tid_dest_list for add registration | |
1507 | * processing in the loop of tid_dest_list below. | |
1508 | */ | |
1509 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1510 | if (!tidh_new) { |
1511 | pr_err("Unable to allocate tidh_new\n"); | |
03e98c9e NB |
1512 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1513 | return -EINVAL; | |
c66ac9db NB |
1514 | } |
1515 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1516 | tidh_new->dest_tpg = tpg; | |
1517 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1518 | tidh_new->dest_se_deve = local_se_deve; | |
1519 | ||
5951146d | 1520 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1521 | se_sess->se_node_acl, local_se_deve, l_isid, |
1522 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1523 | if (!local_pr_reg) { |
c66ac9db | 1524 | kfree(tidh_new); |
03e98c9e NB |
1525 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1526 | return -ENOMEM; | |
c66ac9db NB |
1527 | } |
1528 | tidh_new->dest_pr_reg = local_pr_reg; | |
1529 | /* | |
1530 | * The local I_T nexus does not hold any configfs dependances, | |
1531 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1532 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1533 | */ | |
1534 | tidh_new->dest_local_nexus = 1; | |
1535 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
05d1c7c0 AG |
1536 | |
1537 | buf = transport_kmap_first_data_page(cmd); | |
c66ac9db NB |
1538 | /* |
1539 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1540 | * first extract TransportID Parameter Data Length, and make sure | |
1541 | * the value matches up to the SCSI expected data transfer length. | |
1542 | */ | |
1543 | tpdl = (buf[24] & 0xff) << 24; | |
1544 | tpdl |= (buf[25] & 0xff) << 16; | |
1545 | tpdl |= (buf[26] & 0xff) << 8; | |
1546 | tpdl |= buf[27] & 0xff; | |
1547 | ||
1548 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1549 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1550 | " does not equal CDB data_length: %u\n", tpdl, |
1551 | cmd->data_length); | |
03e98c9e NB |
1552 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1553 | ret = -EINVAL; | |
c66ac9db NB |
1554 | goto out; |
1555 | } | |
1556 | /* | |
1557 | * Start processing the received transport IDs using the | |
1558 | * receiving I_T Nexus portal's fabric dependent methods to | |
1559 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1560 | */ | |
1561 | ptr = &buf[28]; | |
1562 | ||
1563 | while (tpdl > 0) { | |
1564 | proto_ident = (ptr[0] & 0x0f); | |
1565 | dest_tpg = NULL; | |
1566 | ||
1567 | spin_lock(&dev->se_port_lock); | |
1568 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1569 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1570 | if (!tmp_tpg) |
c66ac9db | 1571 | continue; |
e3d6f909 | 1572 | tmp_tf_ops = tmp_tpg->se_tpg_tfo; |
6708bb27 | 1573 | if (!tmp_tf_ops) |
c66ac9db | 1574 | continue; |
6708bb27 AG |
1575 | if (!tmp_tf_ops->get_fabric_proto_ident || |
1576 | !tmp_tf_ops->tpg_parse_pr_out_transport_id) | |
c66ac9db NB |
1577 | continue; |
1578 | /* | |
1579 | * Look for the matching proto_ident provided by | |
1580 | * the received TransportID | |
1581 | */ | |
1582 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); | |
1583 | if (tmp_proto_ident != proto_ident) | |
1584 | continue; | |
1585 | dest_rtpi = tmp_port->sep_rtpi; | |
1586 | ||
1587 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( | |
1588 | tmp_tpg, (const char *)ptr, &tid_len, | |
1589 | &iport_ptr); | |
6708bb27 | 1590 | if (!i_str) |
c66ac9db NB |
1591 | continue; |
1592 | ||
1593 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); | |
1594 | smp_mb__after_atomic_inc(); | |
1595 | spin_unlock(&dev->se_port_lock); | |
1596 | ||
1597 | ret = core_scsi3_tpg_depend_item(tmp_tpg); | |
1598 | if (ret != 0) { | |
6708bb27 | 1599 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db NB |
1600 | " for tmp_tpg\n"); |
1601 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); | |
1602 | smp_mb__after_atomic_dec(); | |
03e98c9e NB |
1603 | cmd->scsi_sense_reason = |
1604 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1605 | ret = -EINVAL; | |
c66ac9db NB |
1606 | goto out; |
1607 | } | |
1608 | /* | |
1609 | * Locate the desination initiator ACL to be registered | |
1610 | * from the decoded fabric module specific TransportID | |
1611 | * at *i_str. | |
1612 | */ | |
28638887 | 1613 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db NB |
1614 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1615 | tmp_tpg, i_str); | |
1616 | if (dest_node_acl) { | |
1617 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
1618 | smp_mb__after_atomic_inc(); | |
1619 | } | |
28638887 | 1620 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db | 1621 | |
6708bb27 | 1622 | if (!dest_node_acl) { |
c66ac9db NB |
1623 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1624 | spin_lock(&dev->se_port_lock); | |
1625 | continue; | |
1626 | } | |
1627 | ||
1628 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
1629 | if (ret != 0) { | |
6708bb27 | 1630 | pr_err("configfs_depend_item() failed" |
c66ac9db NB |
1631 | " for dest_node_acl->acl_group\n"); |
1632 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
1633 | smp_mb__after_atomic_dec(); | |
1634 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
03e98c9e NB |
1635 | cmd->scsi_sense_reason = |
1636 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1637 | ret = -EINVAL; | |
c66ac9db NB |
1638 | goto out; |
1639 | } | |
1640 | ||
1641 | dest_tpg = tmp_tpg; | |
6708bb27 | 1642 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1643 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1644 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1645 | dest_node_acl->initiatorname, dest_rtpi); |
1646 | ||
1647 | spin_lock(&dev->se_port_lock); | |
1648 | break; | |
1649 | } | |
1650 | spin_unlock(&dev->se_port_lock); | |
1651 | ||
6708bb27 AG |
1652 | if (!dest_tpg) { |
1653 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1654 | " dest_tpg\n"); |
03e98c9e NB |
1655 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1656 | ret = -EINVAL; | |
c66ac9db NB |
1657 | goto out; |
1658 | } | |
1659 | #if 0 | |
6708bb27 | 1660 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1661 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1662 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db NB |
1663 | tpdl, tid_len, i_str, iport_ptr); |
1664 | #endif | |
1665 | if (tid_len > tpdl) { | |
6708bb27 | 1666 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1667 | " %u for Transport ID: %s\n", tid_len, ptr); |
1668 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1669 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1670 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1671 | ret = -EINVAL; | |
c66ac9db NB |
1672 | goto out; |
1673 | } | |
1674 | /* | |
1675 | * Locate the desintation struct se_dev_entry pointer for matching | |
1676 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1677 | * Target Port. | |
1678 | */ | |
1679 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1680 | dest_rtpi); | |
6708bb27 AG |
1681 | if (!dest_se_deve) { |
1682 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1683 | " from destination RTPI: %hu\n", |
e3d6f909 | 1684 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1685 | dest_rtpi); |
1686 | ||
1687 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1688 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1689 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1690 | ret = -EINVAL; | |
c66ac9db NB |
1691 | goto out; |
1692 | } | |
1693 | ||
1694 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
1695 | if (ret < 0) { | |
6708bb27 | 1696 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db NB |
1697 | " failed\n"); |
1698 | atomic_dec(&dest_se_deve->pr_ref_count); | |
1699 | smp_mb__after_atomic_dec(); | |
1700 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1701 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1702 | cmd->scsi_sense_reason = |
1703 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1704 | ret = -EINVAL; | |
c66ac9db NB |
1705 | goto out; |
1706 | } | |
1707 | #if 0 | |
6708bb27 | 1708 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1709 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1710 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1711 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
1712 | #endif | |
1713 | /* | |
1714 | * Skip any TransportIDs that already have a registration for | |
1715 | * this target port. | |
1716 | */ | |
1717 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1718 | iport_ptr); | |
1719 | if (pr_reg_e) { | |
1720 | core_scsi3_put_pr_reg(pr_reg_e); | |
1721 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1722 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1723 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1724 | ptr += tid_len; | |
1725 | tpdl -= tid_len; | |
1726 | tid_len = 0; | |
1727 | continue; | |
1728 | } | |
1729 | /* | |
1730 | * Allocate a struct pr_transport_id_holder and setup | |
1731 | * the dest_node_acl and dest_se_deve pointers for the | |
1732 | * loop below. | |
1733 | */ | |
1734 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1735 | GFP_KERNEL); | |
6708bb27 AG |
1736 | if (!tidh_new) { |
1737 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1738 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1739 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1740 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1741 | cmd->scsi_sense_reason = |
1742 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1743 | ret = -ENOMEM; | |
c66ac9db NB |
1744 | goto out; |
1745 | } | |
1746 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1747 | tidh_new->dest_tpg = dest_tpg; | |
1748 | tidh_new->dest_node_acl = dest_node_acl; | |
1749 | tidh_new->dest_se_deve = dest_se_deve; | |
1750 | ||
1751 | /* | |
1752 | * Allocate, but do NOT add the registration for the | |
1753 | * TransportID referenced SCSI Initiator port. This | |
1754 | * done because of the following from spc4r17 in section | |
1755 | * 6.14.3 wrt SPEC_I_PT: | |
1756 | * | |
1757 | * "If a registration fails for any initiator port (e.g., if th | |
1758 | * logical unit does not have enough resources available to | |
1759 | * hold the registration information), no registrations shall be | |
1760 | * made, and the command shall be terminated with | |
1761 | * CHECK CONDITION status." | |
1762 | * | |
1763 | * That means we call __core_scsi3_alloc_registration() here, | |
1764 | * and then call __core_scsi3_add_registration() in the | |
1765 | * 2nd loop which will never fail. | |
1766 | */ | |
5951146d | 1767 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1768 | dest_node_acl, dest_se_deve, iport_ptr, |
1769 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1770 | if (!dest_pr_reg) { |
c66ac9db NB |
1771 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1772 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1773 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1774 | kfree(tidh_new); | |
03e98c9e NB |
1775 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1776 | ret = -EINVAL; | |
c66ac9db NB |
1777 | goto out; |
1778 | } | |
1779 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1780 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1781 | ||
1782 | ptr += tid_len; | |
1783 | tpdl -= tid_len; | |
1784 | tid_len = 0; | |
1785 | ||
1786 | } | |
05d1c7c0 AG |
1787 | |
1788 | transport_kunmap_first_data_page(cmd); | |
1789 | ||
c66ac9db NB |
1790 | /* |
1791 | * Go ahead and create a registrations from tid_dest_list for the | |
1792 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1793 | * and dest_se_deve. | |
1794 | * | |
1795 | * The SA Reservation Key from the PROUT is set for the | |
1796 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1797 | * means that the TransportID Initiator port will be | |
1798 | * registered on all of the target ports in the SCSI target device | |
1799 | * ALL_TG_PT=0 means the registration will only be for the | |
1800 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1801 | * was received. | |
1802 | */ | |
1803 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1804 | dest_tpg = tidh->dest_tpg; | |
1805 | dest_node_acl = tidh->dest_node_acl; | |
1806 | dest_se_deve = tidh->dest_se_deve; | |
1807 | dest_pr_reg = tidh->dest_pr_reg; | |
1808 | dest_local_nexus = tidh->dest_local_nexus; | |
1809 | ||
1810 | list_del(&tidh->dest_list); | |
1811 | kfree(tidh); | |
1812 | ||
1813 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1814 | prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], | |
1815 | PR_REG_ISID_ID_LEN); | |
1816 | ||
5951146d | 1817 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1818 | dest_pr_reg, 0, 0); |
1819 | ||
6708bb27 | 1820 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1821 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1822 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1823 | dest_node_acl->initiatorname, (prf_isid) ? |
1824 | &i_buf[0] : "", dest_se_deve->mapped_lun); | |
1825 | ||
1826 | if (dest_local_nexus) | |
1827 | continue; | |
1828 | ||
1829 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1830 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1831 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1832 | } | |
1833 | ||
1834 | return 0; | |
1835 | out: | |
05d1c7c0 | 1836 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
1837 | /* |
1838 | * For the failure case, release everything from tid_dest_list | |
1839 | * including *dest_pr_reg and the configfs dependances.. | |
1840 | */ | |
1841 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1842 | dest_tpg = tidh->dest_tpg; | |
1843 | dest_node_acl = tidh->dest_node_acl; | |
1844 | dest_se_deve = tidh->dest_se_deve; | |
1845 | dest_pr_reg = tidh->dest_pr_reg; | |
1846 | dest_local_nexus = tidh->dest_local_nexus; | |
1847 | ||
1848 | list_del(&tidh->dest_list); | |
1849 | kfree(tidh); | |
1850 | /* | |
1851 | * Release any extra ALL_TG_PT=1 registrations for | |
1852 | * the SPEC_I_PT=1 case. | |
1853 | */ | |
1854 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1855 | &dest_pr_reg->pr_reg_atp_list, | |
1856 | pr_reg_atp_mem_list) { | |
1857 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1858 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1859 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1860 | } | |
1861 | ||
1862 | kfree(dest_pr_reg->pr_aptpl_buf); | |
1863 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); | |
1864 | ||
1865 | if (dest_local_nexus) | |
1866 | continue; | |
1867 | ||
1868 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1869 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1870 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1871 | } | |
1872 | return ret; | |
1873 | } | |
1874 | ||
1875 | /* | |
1876 | * Called with struct se_device->dev_reservation_lock held | |
1877 | */ | |
1878 | static int __core_scsi3_update_aptpl_buf( | |
1879 | struct se_device *dev, | |
1880 | unsigned char *buf, | |
1881 | u32 pr_aptpl_buf_len, | |
1882 | int clear_aptpl_metadata) | |
1883 | { | |
1884 | struct se_lun *lun; | |
1885 | struct se_portal_group *tpg; | |
e3d6f909 | 1886 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1887 | struct t10_pr_registration *pr_reg; |
1888 | unsigned char tmp[512], isid_buf[32]; | |
1889 | ssize_t len = 0; | |
1890 | int reg_count = 0; | |
1891 | ||
1892 | memset(buf, 0, pr_aptpl_buf_len); | |
1893 | /* | |
1894 | * Called to clear metadata once APTPL has been deactivated. | |
1895 | */ | |
1896 | if (clear_aptpl_metadata) { | |
1897 | snprintf(buf, pr_aptpl_buf_len, | |
1898 | "No Registrations or Reservations\n"); | |
1899 | return 0; | |
1900 | } | |
1901 | /* | |
1902 | * Walk the registration list.. | |
1903 | */ | |
e3d6f909 AG |
1904 | spin_lock(&su_dev->t10_pr.registration_lock); |
1905 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
1906 | pr_reg_list) { |
1907 | ||
1908 | tmp[0] = '\0'; | |
1909 | isid_buf[0] = '\0'; | |
1910 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1911 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1912 | /* | |
1913 | * Write out any ISID value to APTPL metadata that was included | |
1914 | * in the original registration. | |
1915 | */ | |
1916 | if (pr_reg->isid_present_at_reg) | |
1917 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1918 | pr_reg->pr_reg_isid); | |
1919 | /* | |
1920 | * Include special metadata if the pr_reg matches the | |
1921 | * reservation holder. | |
1922 | */ | |
1923 | if (dev->dev_pr_res_holder == pr_reg) { | |
1924 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1925 | "\ninitiator_fabric=%s\n" | |
1926 | "initiator_node=%s\n%s" | |
1927 | "sa_res_key=%llu\n" | |
1928 | "res_holder=1\nres_type=%02x\n" | |
1929 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1930 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1931 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1932 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1933 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1934 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1935 | pr_reg->pr_res_mapped_lun); | |
1936 | } else { | |
1937 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1938 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1939 | "sa_res_key=%llu\nres_holder=0\n" | |
1940 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1941 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1942 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1943 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1944 | pr_reg->pr_res_mapped_lun); | |
1945 | } | |
1946 | ||
60d645a4 | 1947 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1948 | pr_err("Unable to update renaming" |
c66ac9db | 1949 | " APTPL metadata\n"); |
e3d6f909 AG |
1950 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1951 | return -EMSGSIZE; | |
c66ac9db NB |
1952 | } |
1953 | len += sprintf(buf+len, "%s", tmp); | |
1954 | ||
1955 | /* | |
1956 | * Include information about the associated SCSI target port. | |
1957 | */ | |
1958 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1959 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1960 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1961 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1962 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1963 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
1964 | ||
60d645a4 | 1965 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1966 | pr_err("Unable to update renaming" |
c66ac9db | 1967 | " APTPL metadata\n"); |
e3d6f909 AG |
1968 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1969 | return -EMSGSIZE; | |
c66ac9db NB |
1970 | } |
1971 | len += sprintf(buf+len, "%s", tmp); | |
1972 | reg_count++; | |
1973 | } | |
e3d6f909 | 1974 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db | 1975 | |
6708bb27 | 1976 | if (!reg_count) |
c66ac9db NB |
1977 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1978 | ||
1979 | return 0; | |
1980 | } | |
1981 | ||
1982 | static int core_scsi3_update_aptpl_buf( | |
1983 | struct se_device *dev, | |
1984 | unsigned char *buf, | |
1985 | u32 pr_aptpl_buf_len, | |
1986 | int clear_aptpl_metadata) | |
1987 | { | |
1988 | int ret; | |
1989 | ||
1990 | spin_lock(&dev->dev_reservation_lock); | |
1991 | ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
1992 | clear_aptpl_metadata); | |
1993 | spin_unlock(&dev->dev_reservation_lock); | |
1994 | ||
1995 | return ret; | |
1996 | } | |
1997 | ||
1998 | /* | |
1999 | * Called with struct se_device->aptpl_file_mutex held | |
2000 | */ | |
2001 | static int __core_scsi3_write_aptpl_to_file( | |
2002 | struct se_device *dev, | |
2003 | unsigned char *buf, | |
2004 | u32 pr_aptpl_buf_len) | |
2005 | { | |
e3d6f909 | 2006 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
2007 | struct file *file; |
2008 | struct iovec iov[1]; | |
2009 | mm_segment_t old_fs; | |
2010 | int flags = O_RDWR | O_CREAT | O_TRUNC; | |
2011 | char path[512]; | |
2012 | int ret; | |
2013 | ||
2014 | memset(iov, 0, sizeof(struct iovec)); | |
2015 | memset(path, 0, 512); | |
2016 | ||
60d645a4 | 2017 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 2018 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 2019 | " into path buffer\n"); |
e3d6f909 | 2020 | return -EMSGSIZE; |
c66ac9db NB |
2021 | } |
2022 | ||
2023 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
2024 | file = filp_open(path, flags, 0600); | |
2025 | if (IS_ERR(file) || !file || !file->f_dentry) { | |
6708bb27 | 2026 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 2027 | " failed\n", path); |
e3d6f909 | 2028 | return (PTR_ERR(file) < 0 ? PTR_ERR(file) : -ENOENT); |
c66ac9db NB |
2029 | } |
2030 | ||
2031 | iov[0].iov_base = &buf[0]; | |
6708bb27 | 2032 | if (!pr_aptpl_buf_len) |
c66ac9db NB |
2033 | iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ |
2034 | else | |
2035 | iov[0].iov_len = pr_aptpl_buf_len; | |
2036 | ||
2037 | old_fs = get_fs(); | |
2038 | set_fs(get_ds()); | |
2039 | ret = vfs_writev(file, &iov[0], 1, &file->f_pos); | |
2040 | set_fs(old_fs); | |
2041 | ||
2042 | if (ret < 0) { | |
6708bb27 | 2043 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
c66ac9db | 2044 | filp_close(file, NULL); |
e3d6f909 | 2045 | return -EIO; |
c66ac9db NB |
2046 | } |
2047 | filp_close(file, NULL); | |
2048 | ||
2049 | return 0; | |
2050 | } | |
2051 | ||
2052 | static int core_scsi3_update_and_write_aptpl( | |
2053 | struct se_device *dev, | |
2054 | unsigned char *in_buf, | |
2055 | u32 in_pr_aptpl_buf_len) | |
2056 | { | |
2057 | unsigned char null_buf[64], *buf; | |
2058 | u32 pr_aptpl_buf_len; | |
2059 | int ret, clear_aptpl_metadata = 0; | |
2060 | /* | |
2061 | * Can be called with a NULL pointer from PROUT service action CLEAR | |
2062 | */ | |
6708bb27 | 2063 | if (!in_buf) { |
c66ac9db NB |
2064 | memset(null_buf, 0, 64); |
2065 | buf = &null_buf[0]; | |
2066 | /* | |
2067 | * This will clear the APTPL metadata to: | |
2068 | * "No Registrations or Reservations" status | |
2069 | */ | |
2070 | pr_aptpl_buf_len = 64; | |
2071 | clear_aptpl_metadata = 1; | |
2072 | } else { | |
2073 | buf = in_buf; | |
2074 | pr_aptpl_buf_len = in_pr_aptpl_buf_len; | |
2075 | } | |
2076 | ||
2077 | ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2078 | clear_aptpl_metadata); | |
2079 | if (ret != 0) | |
e3d6f909 | 2080 | return ret; |
c66ac9db NB |
2081 | /* |
2082 | * __core_scsi3_write_aptpl_to_file() will call strlen() | |
2083 | * on the passed buf to determine pr_aptpl_buf_len. | |
2084 | */ | |
2085 | ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); | |
2086 | if (ret != 0) | |
e3d6f909 | 2087 | return ret; |
c66ac9db NB |
2088 | |
2089 | return ret; | |
2090 | } | |
2091 | ||
2092 | static int core_scsi3_emulate_pro_register( | |
2093 | struct se_cmd *cmd, | |
2094 | u64 res_key, | |
2095 | u64 sa_res_key, | |
2096 | int aptpl, | |
2097 | int all_tg_pt, | |
2098 | int spec_i_pt, | |
2099 | int ignore_key) | |
2100 | { | |
e3d6f909 | 2101 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2102 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2103 | struct se_dev_entry *se_deve; |
e3d6f909 | 2104 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
2105 | struct se_portal_group *se_tpg; |
2106 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; | |
e3d6f909 | 2107 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2108 | /* Used for APTPL metadata w/ UNREGISTER */ |
2109 | unsigned char *pr_aptpl_buf = NULL; | |
2110 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
2111 | int pr_holder = 0, ret = 0, type; | |
2112 | ||
6708bb27 AG |
2113 | if (!se_sess || !se_lun) { |
2114 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2115 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2116 | return -EINVAL; | |
c66ac9db NB |
2117 | } |
2118 | se_tpg = se_sess->se_tpg; | |
2119 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
2120 | ||
e3d6f909 | 2121 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2122 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2123 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2124 | PR_REG_ISID_LEN); |
2125 | isid_ptr = &isid_buf[0]; | |
2126 | } | |
2127 | /* | |
2128 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2129 | */ | |
2130 | pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 | 2131 | if (!pr_reg_e) { |
c66ac9db | 2132 | if (res_key) { |
6708bb27 | 2133 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2134 | " for SA REGISTER, returning CONFLICT\n"); |
03e98c9e NB |
2135 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2136 | return -EINVAL; | |
c66ac9db NB |
2137 | } |
2138 | /* | |
2139 | * Do nothing but return GOOD status. | |
2140 | */ | |
6708bb27 | 2141 | if (!sa_res_key) |
03e98c9e | 2142 | return 0; |
c66ac9db | 2143 | |
6708bb27 | 2144 | if (!spec_i_pt) { |
c66ac9db NB |
2145 | /* |
2146 | * Perform the Service Action REGISTER on the Initiator | |
2147 | * Port Endpoint that the PRO was received from on the | |
2148 | * Logical Unit of the SCSI device server. | |
2149 | */ | |
5951146d | 2150 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
2151 | se_sess->se_node_acl, se_deve, isid_ptr, |
2152 | sa_res_key, all_tg_pt, aptpl, | |
2153 | ignore_key, 0); | |
2154 | if (ret != 0) { | |
6708bb27 | 2155 | pr_err("Unable to allocate" |
c66ac9db | 2156 | " struct t10_pr_registration\n"); |
03e98c9e NB |
2157 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2158 | return -EINVAL; | |
c66ac9db NB |
2159 | } |
2160 | } else { | |
2161 | /* | |
2162 | * Register both the Initiator port that received | |
2163 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2164 | * TransportID from Parameter list and loop through | |
2165 | * fabric dependent parameter list while calling | |
2166 | * logic from of core_scsi3_alloc_registration() for | |
2167 | * each TransportID provided SCSI Initiator Port/Device | |
2168 | */ | |
2169 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2170 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2171 | if (ret != 0) | |
2172 | return ret; | |
2173 | } | |
2174 | /* | |
2175 | * Nothing left to do for the APTPL=0 case. | |
2176 | */ | |
6708bb27 | 2177 | if (!aptpl) { |
c66ac9db | 2178 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 2179 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2180 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
2181 | " REGISTER\n"); |
2182 | return 0; | |
2183 | } | |
2184 | /* | |
2185 | * Locate the newly allocated local I_T Nexus *pr_reg, and | |
2186 | * update the APTPL metadata information using its | |
2187 | * preallocated *pr_reg->pr_aptpl_buf. | |
2188 | */ | |
5951146d | 2189 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db NB |
2190 | se_sess->se_node_acl, se_sess); |
2191 | ||
5951146d | 2192 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2193 | &pr_reg->pr_aptpl_buf[0], |
2194 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2195 | if (!ret) { |
c66ac9db | 2196 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2197 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); |
c66ac9db NB |
2198 | } |
2199 | ||
2200 | core_scsi3_put_pr_reg(pr_reg); | |
2201 | return ret; | |
2202 | } else { | |
2203 | /* | |
2204 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2205 | */ | |
2206 | pr_reg = pr_reg_e; | |
2207 | type = pr_reg->pr_res_type; | |
2208 | ||
6708bb27 | 2209 | if (!ignore_key) { |
c66ac9db | 2210 | if (res_key != pr_reg->pr_res_key) { |
6708bb27 | 2211 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2212 | " res_key: 0x%016Lx does not match" |
2213 | " existing SA REGISTER res_key:" | |
2214 | " 0x%016Lx\n", res_key, | |
2215 | pr_reg->pr_res_key); | |
2216 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2217 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2218 | return -EINVAL; | |
c66ac9db NB |
2219 | } |
2220 | } | |
2221 | if (spec_i_pt) { | |
6708bb27 | 2222 | pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" |
c66ac9db NB |
2223 | " set while sa_res_key=0\n"); |
2224 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2225 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2226 | return -EINVAL; | |
c66ac9db NB |
2227 | } |
2228 | /* | |
2229 | * An existing ALL_TG_PT=1 registration being released | |
2230 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2231 | */ | |
2232 | if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { | |
6708bb27 | 2233 | pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" |
c66ac9db NB |
2234 | " registration exists, but ALL_TG_PT=1 bit not" |
2235 | " present in received PROUT\n"); | |
2236 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2237 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2238 | return -EINVAL; | |
c66ac9db NB |
2239 | } |
2240 | /* | |
2241 | * Allocate APTPL metadata buffer used for UNREGISTER ops | |
2242 | */ | |
2243 | if (aptpl) { | |
2244 | pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, | |
2245 | GFP_KERNEL); | |
6708bb27 AG |
2246 | if (!pr_aptpl_buf) { |
2247 | pr_err("Unable to allocate" | |
c66ac9db NB |
2248 | " pr_aptpl_buf\n"); |
2249 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2250 | cmd->scsi_sense_reason = |
2251 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2252 | return -EINVAL; | |
c66ac9db NB |
2253 | } |
2254 | } | |
2255 | /* | |
2256 | * sa_res_key=0 Unregister Reservation Key for registered I_T | |
2257 | * Nexus sa_res_key=1 Change Reservation Key for registered I_T | |
2258 | * Nexus. | |
2259 | */ | |
6708bb27 | 2260 | if (!sa_res_key) { |
c66ac9db | 2261 | pr_holder = core_scsi3_check_implict_release( |
5951146d | 2262 | cmd->se_dev, pr_reg); |
c66ac9db NB |
2263 | if (pr_holder < 0) { |
2264 | kfree(pr_aptpl_buf); | |
2265 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2266 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2267 | return -EINVAL; | |
c66ac9db NB |
2268 | } |
2269 | ||
2270 | spin_lock(&pr_tmpl->registration_lock); | |
2271 | /* | |
2272 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port | |
2273 | * and matching pr_res_key. | |
2274 | */ | |
2275 | if (pr_reg->pr_reg_all_tg_pt) { | |
2276 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2277 | &pr_tmpl->registration_list, | |
2278 | pr_reg_list) { | |
2279 | ||
6708bb27 | 2280 | if (!pr_reg_p->pr_reg_all_tg_pt) |
c66ac9db NB |
2281 | continue; |
2282 | ||
2283 | if (pr_reg_p->pr_res_key != res_key) | |
2284 | continue; | |
2285 | ||
2286 | if (pr_reg == pr_reg_p) | |
2287 | continue; | |
2288 | ||
2289 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2290 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2291 | continue; | |
2292 | ||
2293 | __core_scsi3_free_registration(dev, | |
2294 | pr_reg_p, NULL, 0); | |
2295 | } | |
2296 | } | |
2297 | /* | |
2298 | * Release the calling I_T Nexus registration now.. | |
2299 | */ | |
5951146d | 2300 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, |
c66ac9db NB |
2301 | NULL, 1); |
2302 | /* | |
2303 | * From spc4r17, section 5.7.11.3 Unregistering | |
2304 | * | |
2305 | * If the persistent reservation is a registrants only | |
2306 | * type, the device server shall establish a unit | |
2307 | * attention condition for the initiator port associated | |
2308 | * with every registered I_T nexus except for the I_T | |
2309 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2310 | * received, with the additional sense code set to | |
2311 | * RESERVATIONS RELEASED. | |
2312 | */ | |
2313 | if (pr_holder && | |
2314 | ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
2315 | (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { | |
2316 | list_for_each_entry(pr_reg_p, | |
2317 | &pr_tmpl->registration_list, | |
2318 | pr_reg_list) { | |
2319 | ||
2320 | core_scsi3_ua_allocate( | |
2321 | pr_reg_p->pr_reg_nacl, | |
2322 | pr_reg_p->pr_res_mapped_lun, | |
2323 | 0x2A, | |
2324 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
2325 | } | |
2326 | } | |
2327 | spin_unlock(&pr_tmpl->registration_lock); | |
2328 | ||
6708bb27 | 2329 | if (!aptpl) { |
c66ac9db NB |
2330 | pr_tmpl->pr_aptpl_active = 0; |
2331 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
6708bb27 | 2332 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2333 | " for UNREGISTER\n"); |
2334 | return 0; | |
2335 | } | |
2336 | ||
2337 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2338 | &pr_aptpl_buf[0], | |
2339 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2340 | if (!ret) { |
c66ac9db | 2341 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2342 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2343 | " for UNREGISTER\n"); |
2344 | } | |
2345 | ||
2346 | kfree(pr_aptpl_buf); | |
2347 | return ret; | |
2348 | } else { | |
2349 | /* | |
2350 | * Increment PRgeneration counter for struct se_device" | |
2351 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2352 | * READ_KEYS service action. | |
2353 | */ | |
2354 | pr_reg->pr_res_generation = core_scsi3_pr_generation( | |
5951146d | 2355 | cmd->se_dev); |
c66ac9db | 2356 | pr_reg->pr_res_key = sa_res_key; |
6708bb27 | 2357 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" |
c66ac9db | 2358 | " Key for %s to: 0x%016Lx PRgeneration:" |
e3d6f909 | 2359 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2360 | (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", |
2361 | pr_reg->pr_reg_nacl->initiatorname, | |
2362 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2363 | ||
6708bb27 | 2364 | if (!aptpl) { |
c66ac9db NB |
2365 | pr_tmpl->pr_aptpl_active = 0; |
2366 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2367 | core_scsi3_put_pr_reg(pr_reg); | |
6708bb27 | 2368 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2369 | " for REGISTER\n"); |
2370 | return 0; | |
2371 | } | |
2372 | ||
2373 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2374 | &pr_aptpl_buf[0], | |
2375 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2376 | if (!ret) { |
c66ac9db | 2377 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2378 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2379 | " for REGISTER\n"); |
2380 | } | |
2381 | ||
2382 | kfree(pr_aptpl_buf); | |
2383 | core_scsi3_put_pr_reg(pr_reg); | |
2384 | } | |
2385 | } | |
2386 | return 0; | |
2387 | } | |
2388 | ||
2389 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2390 | { | |
2391 | switch (type) { | |
2392 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2393 | return "Write Exclusive Access"; | |
2394 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2395 | return "Exclusive Access"; | |
2396 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2397 | return "Write Exclusive Access, Registrants Only"; | |
2398 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2399 | return "Exclusive Access, Registrants Only"; | |
2400 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2401 | return "Write Exclusive Access, All Registrants"; | |
2402 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2403 | return "Exclusive Access, All Registrants"; | |
2404 | default: | |
2405 | break; | |
2406 | } | |
2407 | ||
2408 | return "Unknown SPC-3 PR Type"; | |
2409 | } | |
2410 | ||
2411 | static int core_scsi3_pro_reserve( | |
2412 | struct se_cmd *cmd, | |
2413 | struct se_device *dev, | |
2414 | int type, | |
2415 | int scope, | |
2416 | u64 res_key) | |
2417 | { | |
e3d6f909 | 2418 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db | 2419 | struct se_dev_entry *se_deve; |
e3d6f909 | 2420 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
2421 | struct se_portal_group *se_tpg; |
2422 | struct t10_pr_registration *pr_reg, *pr_res_holder; | |
e3d6f909 | 2423 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2424 | char i_buf[PR_REG_ISID_ID_LEN]; |
2425 | int ret, prf_isid; | |
2426 | ||
2427 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2428 | ||
6708bb27 AG |
2429 | if (!se_sess || !se_lun) { |
2430 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2431 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2432 | return -EINVAL; | |
c66ac9db NB |
2433 | } |
2434 | se_tpg = se_sess->se_tpg; | |
2435 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
2436 | /* | |
2437 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2438 | */ | |
5951146d | 2439 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2440 | se_sess); |
6708bb27 AG |
2441 | if (!pr_reg) { |
2442 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2443 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
03e98c9e NB |
2444 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2445 | return -EINVAL; | |
c66ac9db NB |
2446 | } |
2447 | /* | |
2448 | * From spc4r17 Section 5.7.9: Reserving: | |
2449 | * | |
2450 | * An application client creates a persistent reservation by issuing | |
2451 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2452 | * a registered I_T nexus with the following parameters: | |
2453 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2454 | * registered with the logical unit for the I_T nexus; and | |
2455 | */ | |
2456 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2457 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2458 | " does not match existing SA REGISTER res_key:" |
2459 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2460 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2461 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2462 | return -EINVAL; | |
c66ac9db NB |
2463 | } |
2464 | /* | |
2465 | * From spc4r17 Section 5.7.9: Reserving: | |
2466 | * | |
2467 | * From above: | |
2468 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2469 | * being created. | |
2470 | * | |
2471 | * Only one persistent reservation is allowed at a time per logical unit | |
2472 | * and that persistent reservation has a scope of LU_SCOPE. | |
2473 | */ | |
2474 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2475 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2476 | core_scsi3_put_pr_reg(pr_reg); |
03e98c9e NB |
2477 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2478 | return -EINVAL; | |
c66ac9db NB |
2479 | } |
2480 | /* | |
2481 | * See if we have an existing PR reservation holder pointer at | |
2482 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2483 | * *pr_res_holder. | |
2484 | */ | |
2485 | spin_lock(&dev->dev_reservation_lock); | |
2486 | pr_res_holder = dev->dev_pr_res_holder; | |
2487 | if ((pr_res_holder)) { | |
2488 | /* | |
2489 | * From spc4r17 Section 5.7.9: Reserving: | |
2490 | * | |
2491 | * If the device server receives a PERSISTENT RESERVE OUT | |
2492 | * command from an I_T nexus other than a persistent reservation | |
2493 | * holder (see 5.7.10) that attempts to create a persistent | |
2494 | * reservation when a persistent reservation already exists for | |
2495 | * the logical unit, then the command shall be completed with | |
2496 | * RESERVATION CONFLICT status. | |
2497 | */ | |
2498 | if (pr_res_holder != pr_reg) { | |
2499 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2500 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2501 | " [%s]: %s while reservation already held by" |
2502 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2503 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2504 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2505 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2506 | pr_res_holder->pr_reg_nacl->initiatorname); |
2507 | ||
2508 | spin_unlock(&dev->dev_reservation_lock); | |
2509 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2510 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2511 | return -EINVAL; | |
c66ac9db NB |
2512 | } |
2513 | /* | |
2514 | * From spc4r17 Section 5.7.9: Reserving: | |
2515 | * | |
2516 | * If a persistent reservation holder attempts to modify the | |
2517 | * type or scope of an existing persistent reservation, the | |
2518 | * command shall be completed with RESERVATION CONFLICT status. | |
2519 | */ | |
2520 | if ((pr_res_holder->pr_res_type != type) || | |
2521 | (pr_res_holder->pr_res_scope != scope)) { | |
2522 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2523 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2524 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2525 | " while reservation already held by [%s]: %s," | |
2526 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2527 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2528 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2529 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2530 | pr_res_holder->pr_reg_nacl->initiatorname); |
2531 | ||
2532 | spin_unlock(&dev->dev_reservation_lock); | |
2533 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2534 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2535 | return -EINVAL; | |
c66ac9db NB |
2536 | } |
2537 | /* | |
2538 | * From spc4r17 Section 5.7.9: Reserving: | |
2539 | * | |
2540 | * If the device server receives a PERSISTENT RESERVE OUT | |
2541 | * command with RESERVE service action where the TYPE field and | |
2542 | * the SCOPE field contain the same values as the existing type | |
2543 | * and scope from a persistent reservation holder, it shall not | |
2544 | * make any change to the existing persistent reservation and | |
2545 | * shall completethe command with GOOD status. | |
2546 | */ | |
2547 | spin_unlock(&dev->dev_reservation_lock); | |
2548 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2549 | return 0; |
c66ac9db NB |
2550 | } |
2551 | /* | |
2552 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2553 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2554 | */ | |
2555 | pr_reg->pr_res_scope = scope; | |
2556 | pr_reg->pr_res_type = type; | |
2557 | pr_reg->pr_res_holder = 1; | |
2558 | dev->dev_pr_res_holder = pr_reg; | |
2559 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2560 | PR_REG_ISID_ID_LEN); | |
2561 | ||
6708bb27 | 2562 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2563 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2564 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2565 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2566 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2567 | cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2568 | se_sess->se_node_acl->initiatorname, |
2569 | (prf_isid) ? &i_buf[0] : ""); | |
2570 | spin_unlock(&dev->dev_reservation_lock); | |
2571 | ||
2572 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2573 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2574 | &pr_reg->pr_aptpl_buf[0], |
2575 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2576 | if (!ret) |
2577 | pr_debug("SPC-3 PR: Updated APTPL metadata" | |
c66ac9db NB |
2578 | " for RESERVE\n"); |
2579 | } | |
2580 | ||
2581 | core_scsi3_put_pr_reg(pr_reg); | |
2582 | return 0; | |
2583 | } | |
2584 | ||
2585 | static int core_scsi3_emulate_pro_reserve( | |
2586 | struct se_cmd *cmd, | |
2587 | int type, | |
2588 | int scope, | |
2589 | u64 res_key) | |
2590 | { | |
2591 | struct se_device *dev = cmd->se_dev; | |
2592 | int ret = 0; | |
2593 | ||
2594 | switch (type) { | |
2595 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2596 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2597 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2598 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2599 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2600 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2601 | ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); | |
2602 | break; | |
2603 | default: | |
6708bb27 | 2604 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2605 | " 0x%02x\n", type); |
03e98c9e NB |
2606 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2607 | return -EINVAL; | |
c66ac9db NB |
2608 | } |
2609 | ||
2610 | return ret; | |
2611 | } | |
2612 | ||
2613 | /* | |
2614 | * Called with struct se_device->dev_reservation_lock held. | |
2615 | */ | |
2616 | static void __core_scsi3_complete_pro_release( | |
2617 | struct se_device *dev, | |
2618 | struct se_node_acl *se_nacl, | |
2619 | struct t10_pr_registration *pr_reg, | |
2620 | int explict) | |
2621 | { | |
2622 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; | |
2623 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2624 | int prf_isid; | |
2625 | ||
2626 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2627 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2628 | PR_REG_ISID_ID_LEN); | |
2629 | /* | |
2630 | * Go ahead and release the current PR reservation holder. | |
2631 | */ | |
2632 | dev->dev_pr_res_holder = NULL; | |
2633 | ||
6708bb27 | 2634 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" |
c66ac9db NB |
2635 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2636 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", | |
2637 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
2638 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2639 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db NB |
2640 | tfo->get_fabric_name(), se_nacl->initiatorname, |
2641 | (prf_isid) ? &i_buf[0] : ""); | |
2642 | /* | |
2643 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2644 | */ | |
2645 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2646 | } | |
2647 | ||
2648 | static int core_scsi3_emulate_pro_release( | |
2649 | struct se_cmd *cmd, | |
2650 | int type, | |
2651 | int scope, | |
2652 | u64 res_key) | |
2653 | { | |
2654 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2655 | struct se_session *se_sess = cmd->se_sess; |
2656 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2657 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
e3d6f909 | 2658 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2659 | int ret, all_reg = 0; |
2660 | ||
6708bb27 AG |
2661 | if (!se_sess || !se_lun) { |
2662 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2663 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2664 | return -EINVAL; | |
c66ac9db NB |
2665 | } |
2666 | /* | |
2667 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2668 | */ | |
2669 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2670 | if (!pr_reg) { |
2671 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2672 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
03e98c9e NB |
2673 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2674 | return -EINVAL; | |
c66ac9db NB |
2675 | } |
2676 | /* | |
2677 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2678 | * | |
2679 | * If there is no persistent reservation or in response to a persistent | |
2680 | * reservation release request from a registered I_T nexus that is not a | |
2681 | * persistent reservation holder (see 5.7.10), the device server shall | |
2682 | * do the following: | |
2683 | * | |
2684 | * a) Not release the persistent reservation, if any; | |
2685 | * b) Not remove any registrations; and | |
2686 | * c) Complete the command with GOOD status. | |
2687 | */ | |
2688 | spin_lock(&dev->dev_reservation_lock); | |
2689 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2690 | if (!pr_res_holder) { |
c66ac9db NB |
2691 | /* |
2692 | * No persistent reservation, return GOOD status. | |
2693 | */ | |
2694 | spin_unlock(&dev->dev_reservation_lock); | |
2695 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2696 | return 0; |
c66ac9db NB |
2697 | } |
2698 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2699 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
2700 | all_reg = 1; | |
2701 | ||
2702 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { | |
2703 | /* | |
2704 | * Non 'All Registrants' PR Type cases.. | |
2705 | * Release request from a registered I_T nexus that is not a | |
2706 | * persistent reservation holder. return GOOD status. | |
2707 | */ | |
2708 | spin_unlock(&dev->dev_reservation_lock); | |
2709 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2710 | return 0; |
c66ac9db NB |
2711 | } |
2712 | /* | |
2713 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2714 | * | |
2715 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2716 | * release a persistent reservation. | |
2717 | * | |
2718 | * An application client releases the persistent reservation by issuing | |
2719 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2720 | * an I_T nexus that is a persistent reservation holder with the | |
2721 | * following parameters: | |
2722 | * | |
2723 | * a) RESERVATION KEY field set to the value of the reservation key | |
2724 | * that is registered with the logical unit for the I_T nexus; | |
2725 | */ | |
2726 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2727 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2728 | " does not match existing SA REGISTER res_key:" |
2729 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2730 | spin_unlock(&dev->dev_reservation_lock); | |
2731 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2732 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2733 | return -EINVAL; | |
c66ac9db NB |
2734 | } |
2735 | /* | |
2736 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2737 | * | |
2738 | * b) TYPE field and SCOPE field set to match the persistent | |
2739 | * reservation being released. | |
2740 | */ | |
2741 | if ((pr_res_holder->pr_res_type != type) || | |
2742 | (pr_res_holder->pr_res_scope != scope)) { | |
2743 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2744 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2745 | " reservation from [%s]: %s with different TYPE " |
2746 | "and/or SCOPE while reservation already held by" | |
2747 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2748 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2749 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2750 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2751 | pr_res_holder->pr_reg_nacl->initiatorname); |
2752 | ||
2753 | spin_unlock(&dev->dev_reservation_lock); | |
2754 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2755 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2756 | return -EINVAL; | |
c66ac9db NB |
2757 | } |
2758 | /* | |
2759 | * In response to a persistent reservation release request from the | |
2760 | * persistent reservation holder the device server shall perform a | |
2761 | * release by doing the following as an uninterrupted series of actions: | |
2762 | * a) Release the persistent reservation; | |
2763 | * b) Not remove any registration(s); | |
2764 | * c) If the released persistent reservation is a registrants only type | |
2765 | * or all registrants type persistent reservation, | |
2766 | * the device server shall establish a unit attention condition for | |
2767 | * the initiator port associated with every regis- | |
2768 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2769 | * RESERVE OUT command with RELEASE service action was received, | |
2770 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2771 | * d) If the persistent reservation is of any other type, the device | |
2772 | * server shall not establish a unit attention condition. | |
2773 | */ | |
2774 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
2775 | pr_reg, 1); | |
2776 | ||
2777 | spin_unlock(&dev->dev_reservation_lock); | |
2778 | ||
2779 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2780 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2781 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2782 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2783 | /* | |
2784 | * If no UNIT ATTENTION conditions will be established for | |
2785 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2786 | * go ahead and check for APTPL=1 update+write below | |
2787 | */ | |
2788 | goto write_aptpl; | |
2789 | } | |
2790 | ||
2791 | spin_lock(&pr_tmpl->registration_lock); | |
2792 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2793 | pr_reg_list) { | |
2794 | /* | |
2795 | * Do not establish a UNIT ATTENTION condition | |
2796 | * for the calling I_T Nexus | |
2797 | */ | |
2798 | if (pr_reg_p == pr_reg) | |
2799 | continue; | |
2800 | ||
2801 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2802 | pr_reg_p->pr_res_mapped_lun, | |
2803 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2804 | } | |
2805 | spin_unlock(&pr_tmpl->registration_lock); | |
2806 | ||
2807 | write_aptpl: | |
2808 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2809 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2810 | &pr_reg->pr_aptpl_buf[0], |
2811 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2812 | if (!ret) |
2813 | pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); | |
c66ac9db NB |
2814 | } |
2815 | ||
2816 | core_scsi3_put_pr_reg(pr_reg); | |
2817 | return 0; | |
2818 | } | |
2819 | ||
2820 | static int core_scsi3_emulate_pro_clear( | |
2821 | struct se_cmd *cmd, | |
2822 | u64 res_key) | |
2823 | { | |
2824 | struct se_device *dev = cmd->se_dev; | |
2825 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 AG |
2826 | struct se_session *se_sess = cmd->se_sess; |
2827 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; | |
c66ac9db NB |
2828 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2829 | u32 pr_res_mapped_lun = 0; | |
2830 | int calling_it_nexus = 0; | |
2831 | /* | |
2832 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2833 | */ | |
5951146d | 2834 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2835 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2836 | if (!pr_reg_n) { |
2837 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2838 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
03e98c9e NB |
2839 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2840 | return -EINVAL; | |
c66ac9db NB |
2841 | } |
2842 | /* | |
2843 | * From spc4r17 section 5.7.11.6, Clearing: | |
2844 | * | |
2845 | * Any application client may release the persistent reservation and | |
2846 | * remove all registrations from a device server by issuing a | |
2847 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2848 | * registered I_T nexus with the following parameter: | |
2849 | * | |
2850 | * a) RESERVATION KEY field set to the value of the reservation key | |
2851 | * that is registered with the logical unit for the I_T nexus. | |
2852 | */ | |
2853 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2854 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2855 | " res_key: 0x%016Lx does not match" |
2856 | " existing SA REGISTER res_key:" | |
2857 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2858 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
2859 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2860 | return -EINVAL; | |
c66ac9db NB |
2861 | } |
2862 | /* | |
2863 | * a) Release the persistent reservation, if any; | |
2864 | */ | |
2865 | spin_lock(&dev->dev_reservation_lock); | |
2866 | pr_res_holder = dev->dev_pr_res_holder; | |
2867 | if (pr_res_holder) { | |
2868 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2869 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
2870 | pr_res_holder, 0); | |
2871 | } | |
2872 | spin_unlock(&dev->dev_reservation_lock); | |
2873 | /* | |
2874 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2875 | */ | |
2876 | spin_lock(&pr_tmpl->registration_lock); | |
2877 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2878 | &pr_tmpl->registration_list, pr_reg_list) { | |
2879 | ||
2880 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2881 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2882 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2883 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2884 | calling_it_nexus); | |
2885 | /* | |
2886 | * e) Establish a unit attention condition for the initiator | |
2887 | * port associated with every registered I_T nexus other | |
2888 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2889 | * command with CLEAR service action was received, with the | |
2890 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2891 | */ | |
6708bb27 | 2892 | if (!calling_it_nexus) |
c66ac9db NB |
2893 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2894 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2895 | } | |
2896 | spin_unlock(&pr_tmpl->registration_lock); | |
2897 | ||
6708bb27 | 2898 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2899 | cmd->se_tfo->get_fabric_name()); |
c66ac9db NB |
2900 | |
2901 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2902 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2903 | pr_debug("SPC-3 PR: Updated APTPL metadata" |
c66ac9db NB |
2904 | " for CLEAR\n"); |
2905 | } | |
2906 | ||
2907 | core_scsi3_pr_generation(dev); | |
2908 | return 0; | |
2909 | } | |
2910 | ||
2911 | /* | |
2912 | * Called with struct se_device->dev_reservation_lock held. | |
2913 | */ | |
2914 | static void __core_scsi3_complete_pro_preempt( | |
2915 | struct se_device *dev, | |
2916 | struct t10_pr_registration *pr_reg, | |
2917 | struct list_head *preempt_and_abort_list, | |
2918 | int type, | |
2919 | int scope, | |
2920 | int abort) | |
2921 | { | |
2922 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
2923 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
2924 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2925 | int prf_isid; | |
2926 | ||
2927 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2928 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2929 | PR_REG_ISID_ID_LEN); | |
2930 | /* | |
2931 | * Do an implict RELEASE of the existing reservation. | |
2932 | */ | |
2933 | if (dev->dev_pr_res_holder) | |
2934 | __core_scsi3_complete_pro_release(dev, nacl, | |
2935 | dev->dev_pr_res_holder, 0); | |
2936 | ||
2937 | dev->dev_pr_res_holder = pr_reg; | |
2938 | pr_reg->pr_res_holder = 1; | |
2939 | pr_reg->pr_res_type = type; | |
2940 | pr_reg->pr_res_scope = scope; | |
2941 | ||
6708bb27 | 2942 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db NB |
2943 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2944 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2945 | core_scsi3_pr_dump_type(type), | |
2946 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2947 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
c66ac9db NB |
2948 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", |
2949 | nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); | |
2950 | /* | |
2951 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2952 | * struct t10_pr_registration to the list that will be compared | |
2953 | * against received CDBs.. | |
2954 | */ | |
2955 | if (preempt_and_abort_list) | |
2956 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2957 | preempt_and_abort_list); | |
2958 | } | |
2959 | ||
2960 | static void core_scsi3_release_preempt_and_abort( | |
2961 | struct list_head *preempt_and_abort_list, | |
2962 | struct t10_pr_registration *pr_reg_holder) | |
2963 | { | |
2964 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2965 | ||
2966 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2967 | pr_reg_abort_list) { | |
2968 | ||
2969 | list_del(&pr_reg->pr_reg_abort_list); | |
2970 | if (pr_reg_holder == pr_reg) | |
2971 | continue; | |
2972 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2973 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2974 | continue; |
2975 | } | |
2976 | ||
2977 | pr_reg->pr_reg_deve = NULL; | |
2978 | pr_reg->pr_reg_nacl = NULL; | |
2979 | kfree(pr_reg->pr_aptpl_buf); | |
2980 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
2981 | } | |
2982 | } | |
2983 | ||
2984 | int core_scsi3_check_cdb_abort_and_preempt( | |
2985 | struct list_head *preempt_and_abort_list, | |
2986 | struct se_cmd *cmd) | |
2987 | { | |
2988 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2989 | ||
2990 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2991 | pr_reg_abort_list) { | |
2992 | if (pr_reg->pr_res_key == cmd->pr_res_key) | |
2993 | return 0; | |
2994 | } | |
2995 | ||
2996 | return 1; | |
2997 | } | |
2998 | ||
2999 | static int core_scsi3_pro_preempt( | |
3000 | struct se_cmd *cmd, | |
3001 | int type, | |
3002 | int scope, | |
3003 | u64 res_key, | |
3004 | u64 sa_res_key, | |
3005 | int abort) | |
3006 | { | |
5951146d | 3007 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3008 | struct se_dev_entry *se_deve; |
3009 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 3010 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
3011 | struct list_head preempt_and_abort_list; |
3012 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; | |
e3d6f909 | 3013 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
3014 | u32 pr_res_mapped_lun = 0; |
3015 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; | |
3016 | int prh_type = 0, prh_scope = 0, ret; | |
3017 | ||
03e98c9e NB |
3018 | if (!se_sess) { |
3019 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3020 | return -EINVAL; | |
3021 | } | |
c66ac9db NB |
3022 | |
3023 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
5951146d | 3024 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3025 | se_sess); |
6708bb27 AG |
3026 | if (!pr_reg_n) { |
3027 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db NB |
3028 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
3029 | (abort) ? "_AND_ABORT" : ""); | |
03e98c9e NB |
3030 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3031 | return -EINVAL; | |
c66ac9db NB |
3032 | } |
3033 | if (pr_reg_n->pr_res_key != res_key) { | |
3034 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3035 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3036 | return -EINVAL; | |
c66ac9db NB |
3037 | } |
3038 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 3039 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 3040 | core_scsi3_put_pr_reg(pr_reg_n); |
03e98c9e NB |
3041 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3042 | return -EINVAL; | |
c66ac9db NB |
3043 | } |
3044 | INIT_LIST_HEAD(&preempt_and_abort_list); | |
3045 | ||
3046 | spin_lock(&dev->dev_reservation_lock); | |
3047 | pr_res_holder = dev->dev_pr_res_holder; | |
3048 | if (pr_res_holder && | |
3049 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3050 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
3051 | all_reg = 1; | |
3052 | ||
6708bb27 | 3053 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
3054 | spin_unlock(&dev->dev_reservation_lock); |
3055 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3056 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3057 | return -EINVAL; | |
c66ac9db NB |
3058 | } |
3059 | /* | |
3060 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
3061 | * | |
3062 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
3063 | * persistent reservation holder or there is no persistent reservation | |
3064 | * holder (i.e., there is no persistent reservation), then the device | |
3065 | * server shall perform a preempt by doing the following in an | |
3066 | * uninterrupted series of actions. (See below..) | |
3067 | */ | |
6708bb27 | 3068 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
3069 | /* |
3070 | * No existing or SA Reservation Key matching reservations.. | |
3071 | * | |
3072 | * PROUT SA PREEMPT with All Registrant type reservations are | |
3073 | * allowed to be processed without a matching SA Reservation Key | |
3074 | */ | |
3075 | spin_lock(&pr_tmpl->registration_lock); | |
3076 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3077 | &pr_tmpl->registration_list, pr_reg_list) { | |
3078 | /* | |
3079 | * Removing of registrations in non all registrants | |
3080 | * type reservations without a matching SA reservation | |
3081 | * key. | |
3082 | * | |
3083 | * a) Remove the registrations for all I_T nexuses | |
3084 | * specified by the SERVICE ACTION RESERVATION KEY | |
3085 | * field; | |
3086 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
3087 | * c) Process tasks as defined in 5.7.1; and | |
3088 | * d) Establish a unit attention condition for the | |
3089 | * initiator port associated with every I_T nexus | |
3090 | * that lost its registration other than the I_T | |
3091 | * nexus on which the PERSISTENT RESERVE OUT command | |
3092 | * was received, with the additional sense code set | |
3093 | * to REGISTRATIONS PREEMPTED. | |
3094 | */ | |
6708bb27 | 3095 | if (!all_reg) { |
c66ac9db NB |
3096 | if (pr_reg->pr_res_key != sa_res_key) |
3097 | continue; | |
3098 | ||
3099 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3100 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3101 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3102 | __core_scsi3_free_registration(dev, pr_reg, | |
3103 | (abort) ? &preempt_and_abort_list : | |
3104 | NULL, calling_it_nexus); | |
3105 | released_regs++; | |
3106 | } else { | |
3107 | /* | |
3108 | * Case for any existing all registrants type | |
3109 | * reservation, follow logic in spc4r17 section | |
3110 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
3111 | * | |
3112 | * For a ZERO SA Reservation key, release | |
3113 | * all other registrations and do an implict | |
3114 | * release of active persistent reservation. | |
3115 | * | |
3116 | * For a non-ZERO SA Reservation key, only | |
3117 | * release the matching reservation key from | |
3118 | * registrations. | |
3119 | */ | |
3120 | if ((sa_res_key) && | |
3121 | (pr_reg->pr_res_key != sa_res_key)) | |
3122 | continue; | |
3123 | ||
3124 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3125 | if (calling_it_nexus) | |
3126 | continue; | |
3127 | ||
3128 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3129 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3130 | __core_scsi3_free_registration(dev, pr_reg, | |
3131 | (abort) ? &preempt_and_abort_list : | |
3132 | NULL, 0); | |
3133 | released_regs++; | |
3134 | } | |
6708bb27 | 3135 | if (!calling_it_nexus) |
c66ac9db NB |
3136 | core_scsi3_ua_allocate(pr_reg_nacl, |
3137 | pr_res_mapped_lun, 0x2A, | |
3138 | ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
3139 | } | |
3140 | spin_unlock(&pr_tmpl->registration_lock); | |
3141 | /* | |
3142 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
3143 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
3144 | * RESERVATION KEY field to a value that does not match any | |
3145 | * registered reservation key, then the device server shall | |
3146 | * complete the command with RESERVATION CONFLICT status. | |
3147 | */ | |
6708bb27 | 3148 | if (!released_regs) { |
c66ac9db NB |
3149 | spin_unlock(&dev->dev_reservation_lock); |
3150 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3151 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3152 | return -EINVAL; | |
c66ac9db NB |
3153 | } |
3154 | /* | |
3155 | * For an existing all registrants type reservation | |
3156 | * with a zero SA rservation key, preempt the existing | |
3157 | * reservation with the new PR type and scope. | |
3158 | */ | |
3159 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
3160 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3161 | (abort) ? &preempt_and_abort_list : NULL, | |
3162 | type, scope, abort); | |
3163 | ||
3164 | if (abort) | |
3165 | core_scsi3_release_preempt_and_abort( | |
3166 | &preempt_and_abort_list, pr_reg_n); | |
3167 | } | |
3168 | spin_unlock(&dev->dev_reservation_lock); | |
3169 | ||
3170 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3171 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3172 | &pr_reg_n->pr_aptpl_buf[0], |
3173 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3174 | if (!ret) |
3175 | pr_debug("SPC-3 PR: Updated APTPL" | |
c66ac9db NB |
3176 | " metadata for PREEMPT%s\n", (abort) ? |
3177 | "_AND_ABORT" : ""); | |
3178 | } | |
3179 | ||
3180 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3181 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3182 | return 0; |
3183 | } | |
3184 | /* | |
3185 | * The PREEMPTing SA reservation key matches that of the | |
3186 | * existing persistent reservation, first, we check if | |
3187 | * we are preempting our own reservation. | |
3188 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3189 | * persistent reservations and registration handling | |
3190 | * | |
3191 | * If an all registrants persistent reservation is not | |
3192 | * present, it is not an error for the persistent | |
3193 | * reservation holder to preempt itself (i.e., a | |
3194 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3195 | * or a PREEMPT AND ABORT service action with the | |
3196 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3197 | * persistent reservation holder's reservation key that | |
3198 | * is received from the persistent reservation holder). | |
3199 | * In that case, the device server shall establish the | |
3200 | * new persistent reservation and maintain the | |
3201 | * registration. | |
3202 | */ | |
3203 | prh_type = pr_res_holder->pr_res_type; | |
3204 | prh_scope = pr_res_holder->pr_res_scope; | |
3205 | /* | |
3206 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3207 | * persistent reservation holder (see 5.7.10), the device | |
3208 | * server shall perform a preempt by doing the following as | |
3209 | * an uninterrupted series of actions: | |
3210 | * | |
3211 | * a) Release the persistent reservation for the holder | |
3212 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3213 | */ | |
3214 | if (pr_reg_n != pr_res_holder) | |
3215 | __core_scsi3_complete_pro_release(dev, | |
3216 | pr_res_holder->pr_reg_nacl, | |
3217 | dev->dev_pr_res_holder, 0); | |
3218 | /* | |
3219 | * b) Remove the registrations for all I_T nexuses identified | |
3220 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3221 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3222 | * OUT command. If an all registrants persistent reservation | |
3223 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3224 | * is set to zero, then all registrations shall be removed | |
3225 | * except for that of the I_T nexus that is being used for | |
3226 | * the PERSISTENT RESERVE OUT command; | |
3227 | */ | |
3228 | spin_lock(&pr_tmpl->registration_lock); | |
3229 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3230 | &pr_tmpl->registration_list, pr_reg_list) { | |
3231 | ||
3232 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3233 | if (calling_it_nexus) | |
3234 | continue; | |
3235 | ||
3236 | if (pr_reg->pr_res_key != sa_res_key) | |
3237 | continue; | |
3238 | ||
3239 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3240 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3241 | __core_scsi3_free_registration(dev, pr_reg, | |
3242 | (abort) ? &preempt_and_abort_list : NULL, | |
3243 | calling_it_nexus); | |
3244 | /* | |
3245 | * e) Establish a unit attention condition for the initiator | |
3246 | * port associated with every I_T nexus that lost its | |
3247 | * persistent reservation and/or registration, with the | |
3248 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3249 | */ | |
3250 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
3251 | ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
3252 | } | |
3253 | spin_unlock(&pr_tmpl->registration_lock); | |
3254 | /* | |
3255 | * c) Establish a persistent reservation for the preempting | |
3256 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3257 | */ | |
3258 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3259 | (abort) ? &preempt_and_abort_list : NULL, | |
3260 | type, scope, abort); | |
3261 | /* | |
3262 | * d) Process tasks as defined in 5.7.1; | |
3263 | * e) See above.. | |
3264 | * f) If the type or scope has changed, then for every I_T nexus | |
3265 | * whose reservation key was not removed, except for the I_T | |
3266 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3267 | * received, the device server shall establish a unit | |
3268 | * attention condition for the initiator port associated with | |
3269 | * that I_T nexus, with the additional sense code set to | |
3270 | * RESERVATIONS RELEASED. If the type or scope have not | |
3271 | * changed, then no unit attention condition(s) shall be | |
3272 | * established for this reason. | |
3273 | */ | |
3274 | if ((prh_type != type) || (prh_scope != scope)) { | |
3275 | spin_lock(&pr_tmpl->registration_lock); | |
3276 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3277 | &pr_tmpl->registration_list, pr_reg_list) { | |
3278 | ||
3279 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3280 | if (calling_it_nexus) | |
3281 | continue; | |
3282 | ||
3283 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3284 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3285 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3286 | } | |
3287 | spin_unlock(&pr_tmpl->registration_lock); | |
3288 | } | |
3289 | spin_unlock(&dev->dev_reservation_lock); | |
3290 | /* | |
3291 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3292 | * All received CDBs for the matching existing reservation and | |
3293 | * registrations undergo ABORT_TASK logic. | |
3294 | * | |
3295 | * From there, core_scsi3_release_preempt_and_abort() will | |
3296 | * release every registration in the list (which have already | |
3297 | * been removed from the primary pr_reg list), except the | |
3298 | * new persistent reservation holder, the calling Initiator Port. | |
3299 | */ | |
3300 | if (abort) { | |
3301 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); | |
3302 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3303 | pr_reg_n); | |
3304 | } | |
3305 | ||
3306 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3307 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3308 | &pr_reg_n->pr_aptpl_buf[0], |
3309 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3310 | if (!ret) |
3311 | pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" | |
c66ac9db NB |
3312 | "%s\n", (abort) ? "_AND_ABORT" : ""); |
3313 | } | |
3314 | ||
3315 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3316 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3317 | return 0; |
3318 | } | |
3319 | ||
3320 | static int core_scsi3_emulate_pro_preempt( | |
3321 | struct se_cmd *cmd, | |
3322 | int type, | |
3323 | int scope, | |
3324 | u64 res_key, | |
3325 | u64 sa_res_key, | |
3326 | int abort) | |
3327 | { | |
3328 | int ret = 0; | |
3329 | ||
3330 | switch (type) { | |
3331 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3332 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3333 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3334 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3335 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3336 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
3337 | ret = core_scsi3_pro_preempt(cmd, type, scope, | |
3338 | res_key, sa_res_key, abort); | |
3339 | break; | |
3340 | default: | |
6708bb27 | 3341 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
c66ac9db | 3342 | " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); |
03e98c9e NB |
3343 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3344 | return -EINVAL; | |
c66ac9db NB |
3345 | } |
3346 | ||
3347 | return ret; | |
3348 | } | |
3349 | ||
3350 | ||
3351 | static int core_scsi3_emulate_pro_register_and_move( | |
3352 | struct se_cmd *cmd, | |
3353 | u64 res_key, | |
3354 | u64 sa_res_key, | |
3355 | int aptpl, | |
3356 | int unreg) | |
3357 | { | |
e3d6f909 | 3358 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3359 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3360 | struct se_dev_entry *se_deve, *dest_se_deve = NULL; |
e3d6f909 | 3361 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3362 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3363 | struct se_port *se_port; | |
3364 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
3365 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; | |
3366 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; | |
e3d6f909 | 3367 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 3368 | unsigned char *buf; |
c66ac9db NB |
3369 | unsigned char *initiator_str; |
3370 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
3371 | u32 tid_len, tmp_tid_len; | |
3372 | int new_reg = 0, type, scope, ret, matching_iname, prf_isid; | |
3373 | unsigned short rtpi; | |
3374 | unsigned char proto_ident; | |
3375 | ||
6708bb27 AG |
3376 | if (!se_sess || !se_lun) { |
3377 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
3378 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3379 | return -EINVAL; | |
c66ac9db NB |
3380 | } |
3381 | memset(dest_iport, 0, 64); | |
3382 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
3383 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3384 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3385 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
3386 | /* | |
3387 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3388 | * Register behaviors for a REGISTER AND MOVE service action | |
3389 | * | |
3390 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3391 | */ | |
5951146d | 3392 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3393 | se_sess); |
6708bb27 AG |
3394 | if (!pr_reg) { |
3395 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3396 | " *pr_reg for REGISTER_AND_MOVE\n"); |
03e98c9e NB |
3397 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3398 | return -EINVAL; | |
c66ac9db NB |
3399 | } |
3400 | /* | |
3401 | * The provided reservation key much match the existing reservation key | |
3402 | * provided during this initiator's I_T nexus registration. | |
3403 | */ | |
3404 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3405 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3406 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3407 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
3408 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3409 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3410 | return -EINVAL; | |
c66ac9db NB |
3411 | } |
3412 | /* | |
3413 | * The service active reservation key needs to be non zero | |
3414 | */ | |
6708bb27 AG |
3415 | if (!sa_res_key) { |
3416 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db NB |
3417 | " sa_res_key\n"); |
3418 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3419 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3420 | return -EINVAL; | |
c66ac9db | 3421 | } |
05d1c7c0 | 3422 | |
c66ac9db NB |
3423 | /* |
3424 | * Determine the Relative Target Port Identifier where the reservation | |
3425 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3426 | * information. | |
3427 | */ | |
05d1c7c0 | 3428 | buf = transport_kmap_first_data_page(cmd); |
c66ac9db NB |
3429 | rtpi = (buf[18] & 0xff) << 8; |
3430 | rtpi |= buf[19] & 0xff; | |
3431 | tid_len = (buf[20] & 0xff) << 24; | |
3432 | tid_len |= (buf[21] & 0xff) << 16; | |
3433 | tid_len |= (buf[22] & 0xff) << 8; | |
3434 | tid_len |= buf[23] & 0xff; | |
05d1c7c0 AG |
3435 | transport_kunmap_first_data_page(cmd); |
3436 | buf = NULL; | |
c66ac9db NB |
3437 | |
3438 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3439 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3440 | " does not equal CDB data_length: %u\n", tid_len, |
3441 | cmd->data_length); | |
3442 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3443 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3444 | return -EINVAL; | |
c66ac9db NB |
3445 | } |
3446 | ||
3447 | spin_lock(&dev->se_port_lock); | |
3448 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3449 | if (se_port->sep_rtpi != rtpi) | |
3450 | continue; | |
3451 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3452 | if (!dest_se_tpg) |
c66ac9db | 3453 | continue; |
e3d6f909 | 3454 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3455 | if (!dest_tf_ops) |
c66ac9db NB |
3456 | continue; |
3457 | ||
3458 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); | |
3459 | smp_mb__after_atomic_inc(); | |
3460 | spin_unlock(&dev->se_port_lock); | |
3461 | ||
3462 | ret = core_scsi3_tpg_depend_item(dest_se_tpg); | |
3463 | if (ret != 0) { | |
6708bb27 | 3464 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db NB |
3465 | " for dest_se_tpg\n"); |
3466 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); | |
3467 | smp_mb__after_atomic_dec(); | |
3468 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3469 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3470 | return -EINVAL; | |
c66ac9db NB |
3471 | } |
3472 | ||
3473 | spin_lock(&dev->se_port_lock); | |
3474 | break; | |
3475 | } | |
3476 | spin_unlock(&dev->se_port_lock); | |
3477 | ||
6708bb27 AG |
3478 | if (!dest_se_tpg || !dest_tf_ops) { |
3479 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3480 | " fabric ops from Relative Target Port Identifier:" |
3481 | " %hu\n", rtpi); | |
3482 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3483 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3484 | return -EINVAL; | |
c66ac9db | 3485 | } |
05d1c7c0 AG |
3486 | |
3487 | buf = transport_kmap_first_data_page(cmd); | |
c66ac9db NB |
3488 | proto_ident = (buf[24] & 0x0f); |
3489 | #if 0 | |
6708bb27 | 3490 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db NB |
3491 | " 0x%02x\n", proto_ident); |
3492 | #endif | |
3493 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { | |
6708bb27 | 3494 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3495 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3496 | " from fabric: %s\n", proto_ident, | |
3497 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), | |
3498 | dest_tf_ops->get_fabric_name()); | |
03e98c9e NB |
3499 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3500 | ret = -EINVAL; | |
c66ac9db NB |
3501 | goto out; |
3502 | } | |
3503 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { | |
6708bb27 | 3504 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" |
c66ac9db NB |
3505 | " containg a valid tpg_parse_pr_out_transport_id" |
3506 | " function pointer\n"); | |
03e98c9e NB |
3507 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3508 | ret = -EINVAL; | |
c66ac9db NB |
3509 | goto out; |
3510 | } | |
3511 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, | |
3512 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); | |
6708bb27 AG |
3513 | if (!initiator_str) { |
3514 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3515 | " initiator_str from Transport ID\n"); |
03e98c9e NB |
3516 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3517 | ret = -EINVAL; | |
c66ac9db NB |
3518 | goto out; |
3519 | } | |
3520 | ||
05d1c7c0 AG |
3521 | transport_kunmap_first_data_page(cmd); |
3522 | buf = NULL; | |
3523 | ||
6708bb27 | 3524 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3525 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3526 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3527 | iport_ptr : ""); | |
3528 | /* | |
3529 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3530 | * action specifies a TransportID that is the same as the initiator port | |
3531 | * of the I_T nexus for the command received, then the command shall | |
3532 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3533 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3534 | * IN PARAMETER LIST. | |
3535 | */ | |
3536 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3537 | matching_iname = (!strcmp(initiator_str, | |
3538 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3539 | if (!matching_iname) |
c66ac9db NB |
3540 | goto after_iport_check; |
3541 | ||
6708bb27 AG |
3542 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3543 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3544 | " matches: %s on received I_T Nexus\n", initiator_str, |
3545 | pr_reg_nacl->initiatorname); | |
03e98c9e NB |
3546 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3547 | ret = -EINVAL; | |
c66ac9db NB |
3548 | goto out; |
3549 | } | |
6708bb27 AG |
3550 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3551 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3552 | " matches: %s %s on received I_T Nexus\n", |
3553 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3554 | pr_reg->pr_reg_isid); | |
03e98c9e NB |
3555 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3556 | ret = -EINVAL; | |
c66ac9db NB |
3557 | goto out; |
3558 | } | |
3559 | after_iport_check: | |
3560 | /* | |
3561 | * Locate the destination struct se_node_acl from the received Transport ID | |
3562 | */ | |
28638887 | 3563 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db NB |
3564 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3565 | initiator_str); | |
3566 | if (dest_node_acl) { | |
3567 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
3568 | smp_mb__after_atomic_inc(); | |
3569 | } | |
28638887 | 3570 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db | 3571 | |
6708bb27 AG |
3572 | if (!dest_node_acl) { |
3573 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3574 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3575 | initiator_str); | |
03e98c9e NB |
3576 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3577 | ret = -EINVAL; | |
c66ac9db NB |
3578 | goto out; |
3579 | } | |
3580 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
3581 | if (ret != 0) { | |
6708bb27 | 3582 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db NB |
3583 | " dest_node_acl\n"); |
3584 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
3585 | smp_mb__after_atomic_dec(); | |
3586 | dest_node_acl = NULL; | |
03e98c9e NB |
3587 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3588 | ret = -EINVAL; | |
c66ac9db NB |
3589 | goto out; |
3590 | } | |
3591 | #if 0 | |
6708bb27 | 3592 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3593 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3594 | dest_node_acl->initiatorname); | |
3595 | #endif | |
3596 | /* | |
3597 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3598 | * PORT IDENTIFIER. | |
3599 | */ | |
3600 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3601 | if (!dest_se_deve) { |
3602 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3603 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
03e98c9e NB |
3604 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3605 | ret = -EINVAL; | |
c66ac9db NB |
3606 | goto out; |
3607 | } | |
3608 | ||
3609 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
3610 | if (ret < 0) { | |
6708bb27 | 3611 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
c66ac9db NB |
3612 | atomic_dec(&dest_se_deve->pr_ref_count); |
3613 | smp_mb__after_atomic_dec(); | |
3614 | dest_se_deve = NULL; | |
03e98c9e NB |
3615 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3616 | ret = -EINVAL; | |
c66ac9db NB |
3617 | goto out; |
3618 | } | |
3619 | #if 0 | |
6708bb27 | 3620 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3621 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3622 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3623 | dest_se_deve->mapped_lun); | |
3624 | #endif | |
3625 | /* | |
3626 | * A persistent reservation needs to already existing in order to | |
3627 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3628 | */ | |
3629 | spin_lock(&dev->dev_reservation_lock); | |
3630 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3631 | if (!pr_res_holder) { |
3632 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3633 | " currently held\n"); |
3634 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3635 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3636 | ret = -EINVAL; | |
c66ac9db NB |
3637 | goto out; |
3638 | } | |
3639 | /* | |
3640 | * The received on I_T Nexus must be the reservation holder. | |
3641 | * | |
3642 | * From spc4r17 section 5.7.8 Table 50 -- | |
3643 | * Register behaviors for a REGISTER AND MOVE service action | |
3644 | */ | |
3645 | if (pr_res_holder != pr_reg) { | |
6708bb27 | 3646 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3647 | " Nexus is not reservation holder\n"); |
3648 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3649 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3650 | ret = -EINVAL; | |
c66ac9db NB |
3651 | goto out; |
3652 | } | |
3653 | /* | |
3654 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3655 | * | |
3656 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3657 | * action is received and the established persistent reservation is a | |
3658 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3659 | * All Registrants type reservation, then the command shall be completed | |
3660 | * with RESERVATION CONFLICT status. | |
3661 | */ | |
3662 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3663 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3664 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3665 | " reservation for type: %s\n", |
3666 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3667 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3668 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3669 | ret = -EINVAL; | |
c66ac9db NB |
3670 | goto out; |
3671 | } | |
3672 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3673 | /* | |
3674 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3675 | */ | |
3676 | type = pr_res_holder->pr_res_type; | |
3677 | scope = pr_res_holder->pr_res_type; | |
3678 | /* | |
3679 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3680 | * RESERVATION KEY field with the I_T nexus specified as the | |
3681 | * destination of the register and move, where: | |
3682 | * A) The I_T nexus is specified by the TransportID and the | |
3683 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3684 | * B) Regardless of the TransportID format used, the association for | |
3685 | * the initiator port is based on either the initiator port name | |
3686 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3687 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3688 | * transport protocols where port names are not required; | |
3689 | * d) Register the reservation key specified in the SERVICE ACTION | |
3690 | * RESERVATION KEY field; | |
3691 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3692 | * RESERVATION KEY field and associated information; | |
3693 | * | |
3694 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3695 | * register an I_T nexus that is already registered with the same | |
3696 | * reservation key or a different reservation key. | |
3697 | */ | |
3698 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3699 | iport_ptr); | |
6708bb27 | 3700 | if (!dest_pr_reg) { |
5951146d | 3701 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
3702 | dest_node_acl, dest_se_deve, iport_ptr, |
3703 | sa_res_key, 0, aptpl, 2, 1); | |
3704 | if (ret != 0) { | |
3705 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3706 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3707 | ret = -EINVAL; | |
c66ac9db NB |
3708 | goto out; |
3709 | } | |
3710 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3711 | iport_ptr); | |
3712 | new_reg = 1; | |
3713 | } | |
3714 | /* | |
3715 | * f) Release the persistent reservation for the persistent reservation | |
3716 | * holder (i.e., the I_T nexus on which the | |
3717 | */ | |
3718 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
3719 | dev->dev_pr_res_holder, 0); | |
3720 | /* | |
3721 | * g) Move the persistent reservation to the specified I_T nexus using | |
3722 | * the same scope and type as the persistent reservation released in | |
3723 | * item f); and | |
3724 | */ | |
3725 | dev->dev_pr_res_holder = dest_pr_reg; | |
3726 | dest_pr_reg->pr_res_holder = 1; | |
3727 | dest_pr_reg->pr_res_type = type; | |
3728 | pr_reg->pr_res_scope = scope; | |
3729 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
3730 | PR_REG_ISID_ID_LEN); | |
3731 | /* | |
3732 | * Increment PRGeneration for existing registrations.. | |
3733 | */ | |
6708bb27 | 3734 | if (!new_reg) |
c66ac9db NB |
3735 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3736 | spin_unlock(&dev->dev_reservation_lock); | |
3737 | ||
6708bb27 | 3738 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3739 | " created new reservation holder TYPE: %s on object RTPI:" |
3740 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3741 | core_scsi3_pr_dump_type(type), rtpi, | |
3742 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3743 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3744 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3745 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
3746 | (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), | |
3747 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? | |
3748 | iport_ptr : ""); | |
3749 | /* | |
3750 | * It is now safe to release configfs group dependencies for destination | |
3751 | * of Transport ID Initiator Device/Port Identifier | |
3752 | */ | |
3753 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3754 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3755 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3756 | /* | |
3757 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3758 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3759 | */ | |
3760 | if (unreg) { | |
3761 | spin_lock(&pr_tmpl->registration_lock); | |
3762 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3763 | spin_unlock(&pr_tmpl->registration_lock); | |
3764 | } else | |
3765 | core_scsi3_put_pr_reg(pr_reg); | |
3766 | ||
3767 | /* | |
3768 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
3769 | * write out the updated metadata to struct file for this SCSI device. | |
3770 | */ | |
6708bb27 | 3771 | if (!aptpl) { |
c66ac9db | 3772 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 3773 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 3774 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
3775 | " REGISTER_AND_MOVE\n"); |
3776 | } else { | |
3777 | pr_tmpl->pr_aptpl_active = 1; | |
5951146d | 3778 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3779 | &dest_pr_reg->pr_aptpl_buf[0], |
3780 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3781 | if (!ret) |
3782 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for" | |
c66ac9db NB |
3783 | " REGISTER_AND_MOVE\n"); |
3784 | } | |
3785 | ||
05d1c7c0 AG |
3786 | transport_kunmap_first_data_page(cmd); |
3787 | ||
c66ac9db NB |
3788 | core_scsi3_put_pr_reg(dest_pr_reg); |
3789 | return 0; | |
3790 | out: | |
05d1c7c0 AG |
3791 | if (buf) |
3792 | transport_kunmap_first_data_page(cmd); | |
c66ac9db NB |
3793 | if (dest_se_deve) |
3794 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3795 | if (dest_node_acl) | |
3796 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3797 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3798 | core_scsi3_put_pr_reg(pr_reg); | |
3799 | return ret; | |
3800 | } | |
3801 | ||
3802 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3803 | { | |
3804 | unsigned int __v1, __v2; | |
3805 | ||
3806 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3807 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3808 | ||
3809 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3810 | } | |
3811 | ||
3812 | /* | |
3813 | * See spc4r17 section 6.14 Table 170 | |
3814 | */ | |
e76a35d6 | 3815 | int target_scsi3_emulate_pr_out(struct se_task *task) |
c66ac9db | 3816 | { |
e76a35d6 | 3817 | struct se_cmd *cmd = task->task_se_cmd; |
617c0e06 | 3818 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3819 | unsigned char *buf; |
c66ac9db NB |
3820 | u64 res_key, sa_res_key; |
3821 | int sa, scope, type, aptpl; | |
3822 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
d29a5b6a | 3823 | int ret; |
617c0e06 CH |
3824 | |
3825 | /* | |
3826 | * Following spc2r20 5.5.1 Reservations overview: | |
3827 | * | |
3828 | * If a logical unit has been reserved by any RESERVE command and is | |
3829 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3830 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3831 | * initiator or service action and shall terminate with a RESERVATION | |
3832 | * CONFLICT status. | |
3833 | */ | |
3834 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { | |
3835 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" | |
3836 | " SPC-2 reservation is held, returning" | |
3837 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
3838 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3839 | ret = EINVAL; | |
d29a5b6a | 3840 | goto out; |
617c0e06 CH |
3841 | } |
3842 | ||
c66ac9db NB |
3843 | /* |
3844 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3845 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3846 | */ | |
03e98c9e NB |
3847 | if (!cmd->se_sess) { |
3848 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3849 | return -EINVAL; | |
3850 | } | |
c66ac9db NB |
3851 | |
3852 | if (cmd->data_length < 24) { | |
6708bb27 | 3853 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3854 | " length too small: %u\n", cmd->data_length); |
03e98c9e NB |
3855 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3856 | ret = -EINVAL; | |
d29a5b6a | 3857 | goto out; |
c66ac9db NB |
3858 | } |
3859 | /* | |
3860 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3861 | */ | |
3862 | sa = (cdb[1] & 0x1f); | |
3863 | scope = (cdb[2] & 0xf0); | |
3864 | type = (cdb[2] & 0x0f); | |
05d1c7c0 AG |
3865 | |
3866 | buf = transport_kmap_first_data_page(cmd); | |
c66ac9db NB |
3867 | /* |
3868 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3869 | */ | |
3870 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3871 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3872 | /* | |
3873 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3874 | * SCSI TransportIDs. | |
3875 | */ | |
3876 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3877 | spec_i_pt = (buf[20] & 0x08); | |
3878 | all_tg_pt = (buf[20] & 0x04); | |
3879 | aptpl = (buf[20] & 0x01); | |
3880 | } else { | |
3881 | aptpl = (buf[17] & 0x01); | |
3882 | unreg = (buf[17] & 0x02); | |
3883 | } | |
05d1c7c0 AG |
3884 | transport_kunmap_first_data_page(cmd); |
3885 | buf = NULL; | |
3886 | ||
c66ac9db NB |
3887 | /* |
3888 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3889 | */ | |
d29a5b6a | 3890 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) { |
03e98c9e NB |
3891 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3892 | ret = -EINVAL; | |
d29a5b6a CH |
3893 | goto out; |
3894 | } | |
3895 | ||
c66ac9db NB |
3896 | /* |
3897 | * From spc4r17 section 6.14: | |
3898 | * | |
3899 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3900 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3901 | * the command shall be terminated with CHECK CONDITION status, with | |
3902 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3903 | * code set to PARAMETER LIST LENGTH ERROR. | |
3904 | */ | |
6708bb27 | 3905 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3906 | (cmd->data_length != 24)) { |
6708bb27 | 3907 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3908 | " list length: %u\n", cmd->data_length); |
03e98c9e NB |
3909 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3910 | ret = -EINVAL; | |
d29a5b6a | 3911 | goto out; |
c66ac9db NB |
3912 | } |
3913 | /* | |
3914 | * (core_scsi3_emulate_pro_* function parameters | |
3915 | * are defined by spc4r17 Table 174: | |
3916 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3917 | */ | |
3918 | switch (sa) { | |
3919 | case PRO_REGISTER: | |
d29a5b6a | 3920 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3921 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); |
d29a5b6a | 3922 | break; |
c66ac9db | 3923 | case PRO_RESERVE: |
d29a5b6a CH |
3924 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3925 | break; | |
c66ac9db | 3926 | case PRO_RELEASE: |
d29a5b6a CH |
3927 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3928 | break; | |
c66ac9db | 3929 | case PRO_CLEAR: |
d29a5b6a CH |
3930 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3931 | break; | |
c66ac9db | 3932 | case PRO_PREEMPT: |
d29a5b6a | 3933 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3934 | res_key, sa_res_key, 0); |
d29a5b6a | 3935 | break; |
c66ac9db | 3936 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3937 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3938 | res_key, sa_res_key, 1); |
d29a5b6a | 3939 | break; |
c66ac9db | 3940 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3941 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3942 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); |
d29a5b6a | 3943 | break; |
c66ac9db | 3944 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3945 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3946 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3947 | break; |
c66ac9db | 3948 | default: |
6708bb27 | 3949 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3950 | " action: 0x%02x\n", cdb[1] & 0x1f); |
03e98c9e NB |
3951 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3952 | ret = -EINVAL; | |
d29a5b6a | 3953 | break; |
c66ac9db NB |
3954 | } |
3955 | ||
d29a5b6a CH |
3956 | out: |
3957 | if (!ret) { | |
3958 | task->task_scsi_status = GOOD; | |
3959 | transport_complete_task(task, 1); | |
3960 | } | |
3961 | return ret; | |
c66ac9db NB |
3962 | } |
3963 | ||
3964 | /* | |
3965 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3966 | * | |
3967 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3968 | */ | |
3969 | static int core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
3970 | { | |
5951146d | 3971 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 3972 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 3973 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3974 | unsigned char *buf; |
c66ac9db NB |
3975 | u32 add_len = 0, off = 8; |
3976 | ||
3977 | if (cmd->data_length < 8) { | |
6708bb27 | 3978 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3979 | " too small\n", cmd->data_length); |
03e98c9e NB |
3980 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3981 | return -EINVAL; | |
c66ac9db NB |
3982 | } |
3983 | ||
05d1c7c0 | 3984 | buf = transport_kmap_first_data_page(cmd); |
e3d6f909 AG |
3985 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
3986 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
3987 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
3988 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3989 | |
e3d6f909 AG |
3990 | spin_lock(&su_dev->t10_pr.registration_lock); |
3991 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
3992 | pr_reg_list) { |
3993 | /* | |
3994 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3995 | * next reservation key list descriptor. | |
3996 | */ | |
3997 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3998 | break; | |
3999 | ||
4000 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4001 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4002 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4003 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4004 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4005 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4006 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4007 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4008 | ||
4009 | add_len += 8; | |
4010 | } | |
e3d6f909 | 4011 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db NB |
4012 | |
4013 | buf[4] = ((add_len >> 24) & 0xff); | |
4014 | buf[5] = ((add_len >> 16) & 0xff); | |
4015 | buf[6] = ((add_len >> 8) & 0xff); | |
4016 | buf[7] = (add_len & 0xff); | |
4017 | ||
05d1c7c0 AG |
4018 | transport_kunmap_first_data_page(cmd); |
4019 | ||
c66ac9db NB |
4020 | return 0; |
4021 | } | |
4022 | ||
4023 | /* | |
4024 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
4025 | * | |
4026 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
4027 | */ | |
4028 | static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
4029 | { | |
5951146d | 4030 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 4031 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 4032 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 4033 | unsigned char *buf; |
c66ac9db NB |
4034 | u64 pr_res_key; |
4035 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
4036 | ||
4037 | if (cmd->data_length < 8) { | |
6708bb27 | 4038 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 4039 | " too small\n", cmd->data_length); |
03e98c9e NB |
4040 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4041 | return -EINVAL; | |
c66ac9db NB |
4042 | } |
4043 | ||
05d1c7c0 | 4044 | buf = transport_kmap_first_data_page(cmd); |
e3d6f909 AG |
4045 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4046 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4047 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4048 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4049 | |
4050 | spin_lock(&se_dev->dev_reservation_lock); | |
4051 | pr_reg = se_dev->dev_pr_res_holder; | |
4052 | if ((pr_reg)) { | |
4053 | /* | |
4054 | * Set the hardcoded Additional Length | |
4055 | */ | |
4056 | buf[4] = ((add_len >> 24) & 0xff); | |
4057 | buf[5] = ((add_len >> 16) & 0xff); | |
4058 | buf[6] = ((add_len >> 8) & 0xff); | |
4059 | buf[7] = (add_len & 0xff); | |
4060 | ||
05d1c7c0 AG |
4061 | if (cmd->data_length < 22) |
4062 | goto err; | |
4063 | ||
c66ac9db NB |
4064 | /* |
4065 | * Set the Reservation key. | |
4066 | * | |
4067 | * From spc4r17, section 5.7.10: | |
4068 | * A persistent reservation holder has its reservation key | |
4069 | * returned in the parameter data from a PERSISTENT | |
4070 | * RESERVE IN command with READ RESERVATION service action as | |
4071 | * follows: | |
4072 | * a) For a persistent reservation of the type Write Exclusive | |
4073 | * - All Registrants or Exclusive Access  All Regitrants, | |
4074 | * the reservation key shall be set to zero; or | |
4075 | * b) For all other persistent reservation types, the | |
4076 | * reservation key shall be set to the registered | |
4077 | * reservation key for the I_T nexus that holds the | |
4078 | * persistent reservation. | |
4079 | */ | |
4080 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
4081 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
4082 | pr_res_key = 0; | |
4083 | else | |
4084 | pr_res_key = pr_reg->pr_res_key; | |
4085 | ||
4086 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
4087 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
4088 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
4089 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
4090 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
4091 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
4092 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
4093 | buf[15] = (pr_res_key & 0xff); | |
4094 | /* | |
4095 | * Set the SCOPE and TYPE | |
4096 | */ | |
4097 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
4098 | (pr_reg->pr_res_type & 0x0f); | |
4099 | } | |
05d1c7c0 AG |
4100 | |
4101 | err: | |
c66ac9db | 4102 | spin_unlock(&se_dev->dev_reservation_lock); |
05d1c7c0 | 4103 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
4104 | |
4105 | return 0; | |
4106 | } | |
4107 | ||
4108 | /* | |
4109 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
4110 | * | |
4111 | * See spc4r17 section 6.13.4 Table 165 | |
4112 | */ | |
4113 | static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
4114 | { | |
5951146d | 4115 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 4116 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4117 | unsigned char *buf; |
c66ac9db NB |
4118 | u16 add_len = 8; /* Hardcoded to 8. */ |
4119 | ||
4120 | if (cmd->data_length < 6) { | |
6708bb27 | 4121 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 4122 | " %u too small\n", cmd->data_length); |
03e98c9e NB |
4123 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4124 | return -EINVAL; | |
c66ac9db NB |
4125 | } |
4126 | ||
05d1c7c0 AG |
4127 | buf = transport_kmap_first_data_page(cmd); |
4128 | ||
c66ac9db NB |
4129 | buf[0] = ((add_len << 8) & 0xff); |
4130 | buf[1] = (add_len & 0xff); | |
4131 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
4132 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
4133 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
4134 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
4135 | /* | |
4136 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
4137 | * set the TMV: Task Mask Valid bit. | |
4138 | */ | |
4139 | buf[3] |= 0x80; | |
4140 | /* | |
4141 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
4142 | */ | |
4143 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
4144 | /* | |
4145 | * PTPL_A: Persistence across Target Power Loss Active bit | |
4146 | */ | |
4147 | if (pr_tmpl->pr_aptpl_active) | |
4148 | buf[3] |= 0x01; | |
4149 | /* | |
4150 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
4151 | */ | |
4152 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4153 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
4154 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
4155 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
4156 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
4157 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4158 | ||
05d1c7c0 AG |
4159 | transport_kunmap_first_data_page(cmd); |
4160 | ||
c66ac9db NB |
4161 | return 0; |
4162 | } | |
4163 | ||
4164 | /* | |
4165 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
4166 | * | |
4167 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
4168 | */ | |
4169 | static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
4170 | { | |
5951146d | 4171 | struct se_device *se_dev = cmd->se_dev; |
c66ac9db | 4172 | struct se_node_acl *se_nacl; |
e3d6f909 | 4173 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db NB |
4174 | struct se_portal_group *se_tpg; |
4175 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 4176 | struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4177 | unsigned char *buf; |
c66ac9db NB |
4178 | u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; |
4179 | u32 off = 8; /* off into first Full Status descriptor */ | |
4180 | int format_code = 0; | |
4181 | ||
4182 | if (cmd->data_length < 8) { | |
6708bb27 | 4183 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 4184 | " too small\n", cmd->data_length); |
03e98c9e NB |
4185 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4186 | return -EINVAL; | |
c66ac9db NB |
4187 | } |
4188 | ||
05d1c7c0 AG |
4189 | buf = transport_kmap_first_data_page(cmd); |
4190 | ||
e3d6f909 AG |
4191 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4192 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4193 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4194 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4195 | |
4196 | spin_lock(&pr_tmpl->registration_lock); | |
4197 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
4198 | &pr_tmpl->registration_list, pr_reg_list) { | |
4199 | ||
4200 | se_nacl = pr_reg->pr_reg_nacl; | |
4201 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
4202 | add_desc_len = 0; | |
4203 | ||
4204 | atomic_inc(&pr_reg->pr_res_holders); | |
4205 | smp_mb__after_atomic_inc(); | |
4206 | spin_unlock(&pr_tmpl->registration_lock); | |
4207 | /* | |
4208 | * Determine expected length of $FABRIC_MOD specific | |
4209 | * TransportID full status descriptor.. | |
4210 | */ | |
e3d6f909 | 4211 | exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( |
c66ac9db NB |
4212 | se_tpg, se_nacl, pr_reg, &format_code); |
4213 | ||
4214 | if ((exp_desc_len + add_len) > cmd->data_length) { | |
6708bb27 | 4215 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
4216 | " out of buffer: %d\n", cmd->data_length); |
4217 | spin_lock(&pr_tmpl->registration_lock); | |
4218 | atomic_dec(&pr_reg->pr_res_holders); | |
4219 | smp_mb__after_atomic_dec(); | |
4220 | break; | |
4221 | } | |
4222 | /* | |
4223 | * Set RESERVATION KEY | |
4224 | */ | |
4225 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4226 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4227 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4228 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4229 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4230 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4231 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4232 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4233 | off += 4; /* Skip Over Reserved area */ | |
4234 | ||
4235 | /* | |
4236 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4237 | */ | |
4238 | if (pr_reg->pr_reg_all_tg_pt) | |
4239 | buf[off] = 0x02; | |
4240 | /* | |
4241 | * The struct se_lun pointer will be present for the | |
4242 | * reservation holder for PR_HOLDER bit. | |
4243 | * | |
4244 | * Also, if this registration is the reservation | |
4245 | * holder, fill in SCOPE and TYPE in the next byte. | |
4246 | */ | |
4247 | if (pr_reg->pr_res_holder) { | |
4248 | buf[off++] |= 0x01; | |
4249 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4250 | (pr_reg->pr_res_type & 0x0f); | |
4251 | } else | |
4252 | off += 2; | |
4253 | ||
4254 | off += 4; /* Skip over reserved area */ | |
4255 | /* | |
4256 | * From spc4r17 6.3.15: | |
4257 | * | |
4258 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4259 | * IDENTIFIER field contains the relative port identifier (see | |
4260 | * 3.1.120) of the target port that is part of the I_T nexus | |
4261 | * described by this full status descriptor. If the ALL_TG_PT | |
4262 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4263 | * IDENTIFIER field are not defined by this standard. | |
4264 | */ | |
6708bb27 | 4265 | if (!pr_reg->pr_reg_all_tg_pt) { |
c66ac9db NB |
4266 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
4267 | ||
4268 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
4269 | buf[off++] = (port->sep_rtpi & 0xff); | |
4270 | } else | |
4271 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ | |
4272 | ||
4273 | /* | |
4274 | * Now, have the $FABRIC_MOD fill in the protocol identifier | |
4275 | */ | |
e3d6f909 | 4276 | desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, |
c66ac9db NB |
4277 | se_nacl, pr_reg, &format_code, &buf[off+4]); |
4278 | ||
4279 | spin_lock(&pr_tmpl->registration_lock); | |
4280 | atomic_dec(&pr_reg->pr_res_holders); | |
4281 | smp_mb__after_atomic_dec(); | |
4282 | /* | |
4283 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4284 | */ | |
4285 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4286 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4287 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4288 | buf[off++] = (desc_len & 0xff); | |
4289 | /* | |
4290 | * Size of full desctipor header minus TransportID | |
4291 | * containing $FABRIC_MOD specific) initiator device/port | |
4292 | * WWN information. | |
4293 | * | |
4294 | * See spc4r17 Section 6.13.5 Table 169 | |
4295 | */ | |
4296 | add_desc_len = (24 + desc_len); | |
4297 | ||
4298 | off += desc_len; | |
4299 | add_len += add_desc_len; | |
4300 | } | |
4301 | spin_unlock(&pr_tmpl->registration_lock); | |
4302 | /* | |
4303 | * Set ADDITIONAL_LENGTH | |
4304 | */ | |
4305 | buf[4] = ((add_len >> 24) & 0xff); | |
4306 | buf[5] = ((add_len >> 16) & 0xff); | |
4307 | buf[6] = ((add_len >> 8) & 0xff); | |
4308 | buf[7] = (add_len & 0xff); | |
4309 | ||
05d1c7c0 AG |
4310 | transport_kunmap_first_data_page(cmd); |
4311 | ||
c66ac9db NB |
4312 | return 0; |
4313 | } | |
4314 | ||
e76a35d6 | 4315 | int target_scsi3_emulate_pr_in(struct se_task *task) |
c66ac9db | 4316 | { |
e76a35d6 | 4317 | struct se_cmd *cmd = task->task_se_cmd; |
d29a5b6a | 4318 | int ret; |
e76a35d6 | 4319 | |
c66ac9db NB |
4320 | /* |
4321 | * Following spc2r20 5.5.1 Reservations overview: | |
4322 | * | |
4323 | * If a logical unit has been reserved by any RESERVE command and is | |
4324 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4325 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4326 | * initiator or service action and shall terminate with a RESERVATION | |
4327 | * CONFLICT status. | |
4328 | */ | |
617c0e06 | 4329 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { |
6708bb27 | 4330 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4331 | " SPC-2 reservation is held, returning" |
4332 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
4333 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
4334 | return -EINVAL; | |
c66ac9db NB |
4335 | } |
4336 | ||
617c0e06 CH |
4337 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4338 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4339 | ret = core_scsi3_pri_read_keys(cmd); |
4340 | break; | |
617c0e06 | 4341 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4342 | ret = core_scsi3_pri_read_reservation(cmd); |
4343 | break; | |
617c0e06 | 4344 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4345 | ret = core_scsi3_pri_report_capabilities(cmd); |
4346 | break; | |
617c0e06 | 4347 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4348 | ret = core_scsi3_pri_read_full_status(cmd); |
4349 | break; | |
617c0e06 CH |
4350 | default: |
4351 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4352 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
03e98c9e NB |
4353 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4354 | ret = -EINVAL; | |
d29a5b6a CH |
4355 | break; |
4356 | } | |
4357 | ||
4358 | if (!ret) { | |
4359 | task->task_scsi_status = GOOD; | |
4360 | transport_complete_task(task, 1); | |
617c0e06 | 4361 | } |
d29a5b6a | 4362 | return ret; |
c66ac9db NB |
4363 | } |
4364 | ||
4365 | static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) | |
4366 | { | |
4367 | return 0; | |
4368 | } | |
4369 | ||
4370 | static int core_pt_seq_non_holder( | |
4371 | struct se_cmd *cmd, | |
4372 | unsigned char *cdb, | |
4373 | u32 pr_reg_type) | |
4374 | { | |
4375 | return 0; | |
4376 | } | |
4377 | ||
4378 | int core_setup_reservations(struct se_device *dev, int force_pt) | |
4379 | { | |
4380 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; | |
e3d6f909 | 4381 | struct t10_reservation *rest = &su_dev->t10_pr; |
c66ac9db NB |
4382 | /* |
4383 | * If this device is from Target_Core_Mod/pSCSI, use the reservations | |
4384 | * of the Underlying SCSI hardware. In Linux/SCSI terms, this can | |
4385 | * cause a problem because libata and some SATA RAID HBAs appear | |
4386 | * under Linux/SCSI, but to emulate reservations themselves. | |
4387 | */ | |
e3d6f909 AG |
4388 | if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && |
4389 | !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) { | |
c66ac9db NB |
4390 | rest->res_type = SPC_PASSTHROUGH; |
4391 | rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; | |
4392 | rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; | |
6708bb27 | 4393 | pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" |
e3d6f909 | 4394 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4395 | return 0; |
4396 | } | |
4397 | /* | |
4398 | * If SPC-3 or above is reported by real or emulated struct se_device, | |
4399 | * use emulated Persistent Reservations. | |
4400 | */ | |
e3d6f909 | 4401 | if (dev->transport->get_device_rev(dev) >= SCSI_3) { |
c66ac9db NB |
4402 | rest->res_type = SPC3_PERSISTENT_RESERVATIONS; |
4403 | rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; | |
4404 | rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; | |
6708bb27 | 4405 | pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" |
e3d6f909 | 4406 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4407 | } else { |
4408 | rest->res_type = SPC2_RESERVATIONS; | |
4409 | rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; | |
4410 | rest->pr_ops.t10_seq_non_holder = | |
4411 | &core_scsi2_reservation_seq_non_holder; | |
6708bb27 | 4412 | pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", |
e3d6f909 | 4413 | dev->transport->name); |
c66ac9db NB |
4414 | } |
4415 | ||
4416 | return 0; | |
4417 | } |