Commit | Line | Data |
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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 | ||
087a03b3 | 120 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
eacac00c CH |
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) | |
087a03b3 | 130 | return -EINVAL; |
eacac00c CH |
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); | |
087a03b3 | 158 | return 1; |
eacac00c CH |
159 | } |
160 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
161 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
162 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
163 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
164 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 165 | return 1; |
eacac00c CH |
166 | } |
167 | core_scsi3_put_pr_reg(pr_reg); | |
168 | conflict = 1; | |
169 | } else { | |
170 | /* | |
171 | * Following spc2r20 5.5.1 Reservations overview: | |
172 | * | |
173 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
174 | * command with the REGISTER or the REGISTER AND IGNORE | |
175 | * EXISTING KEY service action and is still registered by any | |
176 | * initiator, all RESERVE commands and all RELEASE commands | |
177 | * regardless of initiator shall conflict and shall terminate | |
178 | * with a RESERVATION CONFLICT status. | |
179 | */ | |
180 | spin_lock(&pr_tmpl->registration_lock); | |
181 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
182 | spin_unlock(&pr_tmpl->registration_lock); | |
183 | } | |
184 | ||
185 | if (conflict) { | |
186 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
187 | " while active SPC-3 registrations exist," | |
188 | " returning RESERVATION_CONFLICT\n"); | |
03e98c9e | 189 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
087a03b3 | 190 | return -EBUSY; |
eacac00c CH |
191 | } |
192 | ||
087a03b3 | 193 | return 0; |
eacac00c CH |
194 | } |
195 | ||
6bb35e00 | 196 | int target_scsi2_reservation_release(struct se_cmd *cmd) |
c66ac9db NB |
197 | { |
198 | struct se_device *dev = cmd->se_dev; | |
199 | struct se_session *sess = cmd->se_sess; | |
200 | struct se_portal_group *tpg = sess->se_tpg; | |
087a03b3 | 201 | int ret = 0, rc; |
c66ac9db | 202 | |
6708bb27 | 203 | if (!sess || !tpg) |
d29a5b6a | 204 | goto out; |
087a03b3 NB |
205 | rc = target_check_scsi2_reservation_conflict(cmd); |
206 | if (rc == 1) | |
d29a5b6a | 207 | goto out; |
087a03b3 NB |
208 | else if (rc < 0) { |
209 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
210 | ret = -EINVAL; | |
211 | goto out; | |
212 | } | |
c66ac9db | 213 | |
d29a5b6a | 214 | ret = 0; |
c66ac9db | 215 | spin_lock(&dev->dev_reservation_lock); |
d29a5b6a CH |
216 | if (!dev->dev_reserved_node_acl || !sess) |
217 | goto out_unlock; | |
218 | ||
219 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
220 | goto out_unlock; | |
c66ac9db | 221 | |
edc318d9 BK |
222 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
223 | goto out_unlock; | |
224 | ||
c66ac9db NB |
225 | dev->dev_reserved_node_acl = NULL; |
226 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; | |
227 | if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { | |
228 | dev->dev_res_bin_isid = 0; | |
229 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; | |
230 | } | |
6708bb27 | 231 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 AG |
232 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
233 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 234 | sess->se_node_acl->initiatorname); |
c66ac9db | 235 | |
d29a5b6a CH |
236 | out_unlock: |
237 | spin_unlock(&dev->dev_reservation_lock); | |
238 | out: | |
6bb35e00 CH |
239 | if (!ret) |
240 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 241 | return ret; |
c66ac9db NB |
242 | } |
243 | ||
6bb35e00 | 244 | int target_scsi2_reservation_reserve(struct se_cmd *cmd) |
c66ac9db NB |
245 | { |
246 | struct se_device *dev = cmd->se_dev; | |
247 | struct se_session *sess = cmd->se_sess; | |
248 | struct se_portal_group *tpg = sess->se_tpg; | |
087a03b3 | 249 | int ret = 0, rc; |
c66ac9db | 250 | |
a1d8b49a AG |
251 | if ((cmd->t_task_cdb[1] & 0x01) && |
252 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 253 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 254 | " ILLEGAL_REQUEST\n"); |
03e98c9e NB |
255 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
256 | ret = -EINVAL; | |
d29a5b6a | 257 | goto out; |
c66ac9db NB |
258 | } |
259 | /* | |
260 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
261 | * ops | |
262 | */ | |
6708bb27 | 263 | if (!sess || !tpg) |
d29a5b6a | 264 | goto out; |
087a03b3 NB |
265 | rc = target_check_scsi2_reservation_conflict(cmd); |
266 | if (rc == 1) | |
d29a5b6a | 267 | goto out; |
087a03b3 NB |
268 | else if (rc < 0) { |
269 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
270 | ret = -EINVAL; | |
271 | goto out; | |
272 | } | |
c66ac9db | 273 | |
d29a5b6a | 274 | ret = 0; |
c66ac9db NB |
275 | spin_lock(&dev->dev_reservation_lock); |
276 | if (dev->dev_reserved_node_acl && | |
277 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 278 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 279 | tpg->se_tpg_tfo->get_fabric_name()); |
6708bb27 | 280 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 281 | cmd->se_lun->unpacked_lun, |
c66ac9db | 282 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 283 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 284 | " from %s \n", cmd->se_lun->unpacked_lun, |
c66ac9db NB |
285 | cmd->se_deve->mapped_lun, |
286 | sess->se_node_acl->initiatorname); | |
03e98c9e NB |
287 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
288 | ret = -EINVAL; | |
d29a5b6a | 289 | goto out_unlock; |
c66ac9db NB |
290 | } |
291 | ||
292 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
293 | dev->dev_flags |= DF_SPC2_RESERVATIONS; | |
294 | if (sess->sess_bin_isid != 0) { | |
295 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
296 | dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; | |
297 | } | |
6708bb27 | 298 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 AG |
299 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
300 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 301 | sess->se_node_acl->initiatorname); |
c66ac9db | 302 | |
d29a5b6a CH |
303 | out_unlock: |
304 | spin_unlock(&dev->dev_reservation_lock); | |
305 | out: | |
6bb35e00 CH |
306 | if (!ret) |
307 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 308 | return ret; |
c66ac9db NB |
309 | } |
310 | ||
c66ac9db NB |
311 | |
312 | /* | |
313 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
314 | * | |
315 | * This function is called by those initiator ports who are *NOT* | |
316 | * the active PR reservation holder when a reservation is present. | |
317 | */ | |
318 | static int core_scsi3_pr_seq_non_holder( | |
319 | struct se_cmd *cmd, | |
320 | unsigned char *cdb, | |
321 | u32 pr_reg_type) | |
322 | { | |
323 | struct se_dev_entry *se_deve; | |
e3d6f909 | 324 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
325 | int other_cdb = 0, ignore_reg; |
326 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
327 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
328 | int we = 0; /* Write Exclusive */ | |
329 | int legacy = 0; /* Act like a legacy device and return | |
330 | * RESERVATION CONFLICT on some CDBs */ | |
331 | /* | |
332 | * A legacy SPC-2 reservation is being held. | |
333 | */ | |
334 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) | |
335 | return core_scsi2_reservation_seq_non_holder(cmd, | |
336 | cdb, pr_reg_type); | |
337 | ||
f2083241 | 338 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
339 | /* |
340 | * Determine if the registration should be ignored due to | |
341 | * non-matching ISIDs in core_scsi3_pr_reservation_check(). | |
342 | */ | |
343 | ignore_reg = (pr_reg_type & 0x80000000); | |
344 | if (ignore_reg) | |
345 | pr_reg_type &= ~0x80000000; | |
346 | ||
347 | switch (pr_reg_type) { | |
348 | case PR_TYPE_WRITE_EXCLUSIVE: | |
349 | we = 1; | |
350 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
351 | /* | |
352 | * Some commands are only allowed for the persistent reservation | |
353 | * holder. | |
354 | */ | |
355 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
356 | registered_nexus = 1; | |
357 | break; | |
358 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
359 | we = 1; | |
360 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
361 | /* | |
362 | * Some commands are only allowed for registered I_T Nexuses. | |
363 | */ | |
364 | reg_only = 1; | |
365 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
366 | registered_nexus = 1; | |
367 | break; | |
368 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
369 | we = 1; | |
370 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
371 | /* | |
372 | * Each registered I_T Nexus is a reservation holder. | |
373 | */ | |
374 | all_reg = 1; | |
375 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
376 | registered_nexus = 1; | |
377 | break; | |
378 | default: | |
e3d6f909 | 379 | return -EINVAL; |
c66ac9db NB |
380 | } |
381 | /* | |
382 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
383 | */ | |
384 | switch (cdb[0]) { | |
385 | case SECURITY_PROTOCOL_IN: | |
386 | if (registered_nexus) | |
387 | return 0; | |
388 | ret = (we) ? 0 : 1; | |
389 | break; | |
390 | case MODE_SENSE: | |
391 | case MODE_SENSE_10: | |
392 | case READ_ATTRIBUTE: | |
393 | case READ_BUFFER: | |
394 | case RECEIVE_DIAGNOSTIC: | |
395 | if (legacy) { | |
396 | ret = 1; | |
397 | break; | |
398 | } | |
399 | if (registered_nexus) { | |
400 | ret = 0; | |
401 | break; | |
402 | } | |
403 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
404 | break; | |
405 | case PERSISTENT_RESERVE_OUT: | |
406 | /* | |
407 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
408 | * are allowed in the presence of various reservations. | |
409 | * See spc4r17, table 46 | |
410 | */ | |
411 | switch (cdb[1] & 0x1f) { | |
412 | case PRO_CLEAR: | |
413 | case PRO_PREEMPT: | |
414 | case PRO_PREEMPT_AND_ABORT: | |
415 | ret = (registered_nexus) ? 0 : 1; | |
416 | break; | |
417 | case PRO_REGISTER: | |
418 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
419 | ret = 0; | |
420 | break; | |
421 | case PRO_REGISTER_AND_MOVE: | |
422 | case PRO_RESERVE: | |
423 | ret = 1; | |
424 | break; | |
425 | case PRO_RELEASE: | |
426 | ret = (registered_nexus) ? 0 : 1; | |
427 | break; | |
428 | default: | |
6708bb27 | 429 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 430 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 431 | return -EINVAL; |
c66ac9db NB |
432 | } |
433 | break; | |
434 | case RELEASE: | |
435 | case RELEASE_10: | |
eacac00c | 436 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
437 | ret = 0; |
438 | break; | |
439 | case RESERVE: | |
440 | case RESERVE_10: | |
eacac00c | 441 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
442 | ret = 0; |
443 | break; | |
444 | case TEST_UNIT_READY: | |
445 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
446 | break; | |
447 | case MAINTENANCE_IN: | |
448 | switch (cdb[1] & 0x1f) { | |
449 | case MI_MANAGEMENT_PROTOCOL_IN: | |
450 | if (registered_nexus) { | |
451 | ret = 0; | |
452 | break; | |
453 | } | |
454 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
455 | break; | |
456 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
457 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
458 | if (legacy) { | |
459 | ret = 1; | |
460 | break; | |
461 | } | |
462 | if (registered_nexus) { | |
463 | ret = 0; | |
464 | break; | |
465 | } | |
466 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
467 | break; | |
468 | case MI_REPORT_ALIASES: | |
469 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
470 | case MI_REPORT_PRIORITY: | |
471 | case MI_REPORT_TARGET_PGS: | |
472 | case MI_REPORT_TIMESTAMP: | |
473 | ret = 0; /* Allowed */ | |
474 | break; | |
475 | default: | |
6708bb27 | 476 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 477 | (cdb[1] & 0x1f)); |
e3d6f909 | 478 | return -EINVAL; |
c66ac9db NB |
479 | } |
480 | break; | |
481 | case ACCESS_CONTROL_IN: | |
482 | case ACCESS_CONTROL_OUT: | |
483 | case INQUIRY: | |
484 | case LOG_SENSE: | |
485 | case READ_MEDIA_SERIAL_NUMBER: | |
486 | case REPORT_LUNS: | |
487 | case REQUEST_SENSE: | |
6816966a | 488 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
489 | ret = 0; /*/ Allowed CDBs */ |
490 | break; | |
491 | default: | |
492 | other_cdb = 1; | |
493 | break; | |
494 | } | |
495 | /* | |
25985edc | 496 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
497 | * statement. |
498 | */ | |
6708bb27 | 499 | if (!ret && !other_cdb) { |
6708bb27 | 500 | pr_debug("Allowing explict CDB: 0x%02x for %s" |
c66ac9db NB |
501 | " reservation holder\n", cdb[0], |
502 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 503 | |
c66ac9db NB |
504 | return ret; |
505 | } | |
506 | /* | |
507 | * Check if write exclusive initiator ports *NOT* holding the | |
508 | * WRITE_EXCLUSIVE_* reservation. | |
509 | */ | |
510 | if ((we) && !(registered_nexus)) { | |
511 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
512 | /* | |
513 | * Conflict for write exclusive | |
514 | */ | |
6708bb27 | 515 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
516 | " %s CDB: 0x%02x to %s reservation\n", |
517 | transport_dump_cmd_direction(cmd), | |
518 | se_sess->se_node_acl->initiatorname, cdb[0], | |
519 | core_scsi3_pr_dump_type(pr_reg_type)); | |
520 | return 1; | |
521 | } else { | |
522 | /* | |
523 | * Allow non WRITE CDBs for all Write Exclusive | |
524 | * PR TYPEs to pass for registered and | |
525 | * non-registered_nexuxes NOT holding the reservation. | |
526 | * | |
527 | * We only make noise for the unregisterd nexuses, | |
528 | * as we expect registered non-reservation holding | |
529 | * nexuses to issue CDBs. | |
530 | */ | |
8b1e1244 | 531 | |
6708bb27 AG |
532 | if (!registered_nexus) { |
533 | pr_debug("Allowing implict CDB: 0x%02x" | |
c66ac9db NB |
534 | " for %s reservation on unregistered" |
535 | " nexus\n", cdb[0], | |
536 | core_scsi3_pr_dump_type(pr_reg_type)); | |
537 | } | |
8b1e1244 | 538 | |
c66ac9db NB |
539 | return 0; |
540 | } | |
541 | } else if ((reg_only) || (all_reg)) { | |
542 | if (registered_nexus) { | |
543 | /* | |
544 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
545 | * allow commands from registered nexuses. | |
546 | */ | |
8b1e1244 | 547 | |
6708bb27 | 548 | pr_debug("Allowing implict CDB: 0x%02x for %s" |
c66ac9db NB |
549 | " reservation\n", cdb[0], |
550 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 551 | |
c66ac9db NB |
552 | return 0; |
553 | } | |
554 | } | |
6708bb27 | 555 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
556 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
557 | (registered_nexus) ? "" : "un", | |
558 | se_sess->se_node_acl->initiatorname, cdb[0], | |
559 | core_scsi3_pr_dump_type(pr_reg_type)); | |
560 | ||
561 | return 1; /* Conflict by default */ | |
562 | } | |
563 | ||
564 | static u32 core_scsi3_pr_generation(struct se_device *dev) | |
565 | { | |
e3d6f909 | 566 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
567 | u32 prg; |
568 | /* | |
569 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
570 | * counter mainted by the device server. | |
571 | * | |
572 | * Note that this is done regardless of Active Persist across | |
573 | * Target PowerLoss (APTPL) | |
574 | * | |
575 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
576 | */ | |
577 | spin_lock(&dev->dev_reservation_lock); | |
e3d6f909 | 578 | prg = su_dev->t10_pr.pr_generation++; |
c66ac9db NB |
579 | spin_unlock(&dev->dev_reservation_lock); |
580 | ||
581 | return prg; | |
582 | } | |
583 | ||
584 | static int core_scsi3_pr_reservation_check( | |
585 | struct se_cmd *cmd, | |
586 | u32 *pr_reg_type) | |
587 | { | |
588 | struct se_device *dev = cmd->se_dev; | |
589 | struct se_session *sess = cmd->se_sess; | |
590 | int ret; | |
591 | ||
6708bb27 | 592 | if (!sess) |
c66ac9db NB |
593 | return 0; |
594 | /* | |
595 | * A legacy SPC-2 reservation is being held. | |
596 | */ | |
597 | if (dev->dev_flags & DF_SPC2_RESERVATIONS) | |
598 | return core_scsi2_reservation_check(cmd, pr_reg_type); | |
599 | ||
600 | spin_lock(&dev->dev_reservation_lock); | |
6708bb27 | 601 | if (!dev->dev_pr_res_holder) { |
c66ac9db NB |
602 | spin_unlock(&dev->dev_reservation_lock); |
603 | return 0; | |
604 | } | |
605 | *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
606 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
607 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { | |
608 | spin_unlock(&dev->dev_reservation_lock); | |
e3d6f909 | 609 | return -EINVAL; |
c66ac9db | 610 | } |
6708bb27 | 611 | if (!dev->dev_pr_res_holder->isid_present_at_reg) { |
c66ac9db NB |
612 | spin_unlock(&dev->dev_reservation_lock); |
613 | return 0; | |
614 | } | |
615 | ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == | |
e3d6f909 | 616 | sess->sess_bin_isid) ? 0 : -EINVAL; |
c66ac9db NB |
617 | /* |
618 | * Use bit in *pr_reg_type to notify ISID mismatch in | |
619 | * core_scsi3_pr_seq_non_holder(). | |
620 | */ | |
621 | if (ret != 0) | |
622 | *pr_reg_type |= 0x80000000; | |
623 | spin_unlock(&dev->dev_reservation_lock); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( | |
629 | struct se_device *dev, | |
630 | struct se_node_acl *nacl, | |
631 | struct se_dev_entry *deve, | |
632 | unsigned char *isid, | |
633 | u64 sa_res_key, | |
634 | int all_tg_pt, | |
635 | int aptpl) | |
636 | { | |
e3d6f909 | 637 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
638 | struct t10_pr_registration *pr_reg; |
639 | ||
640 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
641 | if (!pr_reg) { |
642 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
643 | return NULL; |
644 | } | |
645 | ||
e3d6f909 | 646 | pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len, |
c66ac9db | 647 | GFP_ATOMIC); |
6708bb27 AG |
648 | if (!pr_reg->pr_aptpl_buf) { |
649 | pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); | |
c66ac9db NB |
650 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
651 | return NULL; | |
652 | } | |
653 | ||
654 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
655 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
656 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
657 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
658 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
659 | atomic_set(&pr_reg->pr_res_holders, 0); | |
660 | pr_reg->pr_reg_nacl = nacl; | |
661 | pr_reg->pr_reg_deve = deve; | |
662 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
663 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
664 | pr_reg->pr_res_key = sa_res_key; | |
665 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
666 | pr_reg->pr_reg_aptpl = aptpl; | |
667 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
668 | /* | |
669 | * If an ISID value for this SCSI Initiator Port exists, | |
670 | * save it to the registration now. | |
671 | */ | |
672 | if (isid != NULL) { | |
673 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
674 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
675 | pr_reg->isid_present_at_reg = 1; | |
676 | } | |
677 | ||
678 | return pr_reg; | |
679 | } | |
680 | ||
681 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
682 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
683 | ||
684 | /* | |
685 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
686 | * modes. | |
687 | */ | |
688 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
689 | struct se_device *dev, | |
690 | struct se_node_acl *nacl, | |
691 | struct se_dev_entry *deve, | |
692 | unsigned char *isid, | |
693 | u64 sa_res_key, | |
694 | int all_tg_pt, | |
695 | int aptpl) | |
696 | { | |
697 | struct se_dev_entry *deve_tmp; | |
698 | struct se_node_acl *nacl_tmp; | |
699 | struct se_port *port, *port_tmp; | |
700 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
701 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; | |
702 | int ret; | |
703 | /* | |
704 | * Create a registration for the I_T Nexus upon which the | |
705 | * PROUT REGISTER was received. | |
706 | */ | |
707 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
708 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 709 | if (!pr_reg) |
c66ac9db NB |
710 | return NULL; |
711 | /* | |
712 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
713 | */ | |
6708bb27 | 714 | if (!all_tg_pt) |
c66ac9db NB |
715 | return pr_reg; |
716 | /* | |
717 | * Create list of matching SCSI Initiator Port registrations | |
718 | * for ALL_TG_PT=1 | |
719 | */ | |
720 | spin_lock(&dev->se_port_lock); | |
721 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
722 | atomic_inc(&port->sep_tg_pt_ref_cnt); | |
723 | smp_mb__after_atomic_inc(); | |
724 | spin_unlock(&dev->se_port_lock); | |
725 | ||
726 | spin_lock_bh(&port->sep_alua_lock); | |
727 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
728 | alua_port_list) { | |
729 | /* | |
730 | * This pointer will be NULL for demo mode MappedLUNs | |
731 | * that have not been make explict via a ConfigFS | |
732 | * MappedLUN group for the SCSI Initiator Node ACL. | |
733 | */ | |
6708bb27 | 734 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
735 | continue; |
736 | ||
737 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
738 | /* | |
739 | * Skip the matching struct se_node_acl that is allocated | |
740 | * above.. | |
741 | */ | |
742 | if (nacl == nacl_tmp) | |
743 | continue; | |
744 | /* | |
745 | * Only perform PR registrations for target ports on | |
746 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
747 | * arrived. | |
748 | */ | |
749 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
750 | continue; | |
751 | /* | |
752 | * Look for a matching Initiator Node ACL in ASCII format | |
753 | */ | |
754 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
755 | continue; | |
756 | ||
757 | atomic_inc(&deve_tmp->pr_ref_count); | |
758 | smp_mb__after_atomic_inc(); | |
759 | spin_unlock_bh(&port->sep_alua_lock); | |
760 | /* | |
761 | * Grab a configfs group dependency that is released | |
762 | * for the exception path at label out: below, or upon | |
763 | * completion of adding ALL_TG_PT=1 registrations in | |
764 | * __core_scsi3_add_registration() | |
765 | */ | |
766 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
767 | if (ret < 0) { | |
6708bb27 | 768 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db NB |
769 | "_item() failed\n"); |
770 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
771 | smp_mb__after_atomic_dec(); | |
772 | atomic_dec(&deve_tmp->pr_ref_count); | |
773 | smp_mb__after_atomic_dec(); | |
774 | goto out; | |
775 | } | |
776 | /* | |
777 | * Located a matching SCSI Initiator Port on a different | |
778 | * port, allocate the pr_reg_atp and attach it to the | |
779 | * pr_reg->pr_reg_atp_list that will be processed once | |
780 | * the original *pr_reg is processed in | |
781 | * __core_scsi3_add_registration() | |
782 | */ | |
783 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
784 | nacl_tmp, deve_tmp, NULL, | |
785 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 786 | if (!pr_reg_atp) { |
c66ac9db NB |
787 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
788 | smp_mb__after_atomic_dec(); | |
789 | atomic_dec(&deve_tmp->pr_ref_count); | |
790 | smp_mb__after_atomic_dec(); | |
791 | core_scsi3_lunacl_undepend_item(deve_tmp); | |
792 | goto out; | |
793 | } | |
794 | ||
795 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
796 | &pr_reg->pr_reg_atp_list); | |
797 | spin_lock_bh(&port->sep_alua_lock); | |
798 | } | |
799 | spin_unlock_bh(&port->sep_alua_lock); | |
800 | ||
801 | spin_lock(&dev->se_port_lock); | |
802 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
803 | smp_mb__after_atomic_dec(); | |
804 | } | |
805 | spin_unlock(&dev->se_port_lock); | |
806 | ||
807 | return pr_reg; | |
808 | out: | |
809 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
810 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
811 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
812 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
813 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
814 | } | |
815 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
816 | return NULL; | |
817 | } | |
818 | ||
819 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 820 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
821 | u64 sa_res_key, |
822 | unsigned char *i_port, | |
823 | unsigned char *isid, | |
824 | u32 mapped_lun, | |
825 | unsigned char *t_port, | |
826 | u16 tpgt, | |
827 | u32 target_lun, | |
828 | int res_holder, | |
829 | int all_tg_pt, | |
830 | u8 type) | |
831 | { | |
832 | struct t10_pr_registration *pr_reg; | |
833 | ||
6708bb27 AG |
834 | if (!i_port || !t_port || !sa_res_key) { |
835 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 836 | return -EINVAL; |
c66ac9db NB |
837 | } |
838 | ||
839 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
840 | if (!pr_reg) { |
841 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 842 | return -ENOMEM; |
c66ac9db NB |
843 | } |
844 | pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); | |
845 | ||
846 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
847 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
848 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
849 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
850 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
851 | atomic_set(&pr_reg->pr_res_holders, 0); | |
852 | pr_reg->pr_reg_nacl = NULL; | |
853 | pr_reg->pr_reg_deve = NULL; | |
854 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
855 | pr_reg->pr_aptpl_target_lun = target_lun; | |
856 | pr_reg->pr_res_key = sa_res_key; | |
857 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
858 | pr_reg->pr_reg_aptpl = 1; | |
859 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
860 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
861 | pr_reg->pr_res_type = type; | |
862 | /* | |
863 | * If an ISID value had been saved in APTPL metadata for this | |
864 | * SCSI Initiator Port, restore it now. | |
865 | */ | |
866 | if (isid != NULL) { | |
867 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
868 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
869 | pr_reg->isid_present_at_reg = 1; | |
870 | } | |
871 | /* | |
872 | * Copy the i_port and t_port information from caller. | |
873 | */ | |
874 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
875 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
876 | pr_reg->pr_reg_tpgt = tpgt; | |
877 | /* | |
878 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
879 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
880 | * the Initiator Node LUN ACL from the fabric module is created for | |
881 | * this registration. | |
882 | */ | |
883 | pr_reg->pr_res_holder = res_holder; | |
884 | ||
885 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 886 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
887 | " metadata\n", (res_holder) ? "+reservation" : ""); |
888 | return 0; | |
889 | } | |
890 | ||
891 | static void core_scsi3_aptpl_reserve( | |
892 | struct se_device *dev, | |
893 | struct se_portal_group *tpg, | |
894 | struct se_node_acl *node_acl, | |
895 | struct t10_pr_registration *pr_reg) | |
896 | { | |
897 | char i_buf[PR_REG_ISID_ID_LEN]; | |
898 | int prf_isid; | |
899 | ||
900 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
901 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
902 | PR_REG_ISID_ID_LEN); | |
903 | ||
904 | spin_lock(&dev->dev_reservation_lock); | |
905 | dev->dev_pr_res_holder = pr_reg; | |
906 | spin_unlock(&dev->dev_reservation_lock); | |
907 | ||
6708bb27 | 908 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 909 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 910 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
911 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
912 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 913 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 914 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
c66ac9db NB |
915 | (prf_isid) ? &i_buf[0] : ""); |
916 | } | |
917 | ||
918 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
919 | struct t10_pr_registration *, int, int); | |
920 | ||
921 | static int __core_scsi3_check_aptpl_registration( | |
922 | struct se_device *dev, | |
923 | struct se_portal_group *tpg, | |
924 | struct se_lun *lun, | |
925 | u32 target_lun, | |
926 | struct se_node_acl *nacl, | |
927 | struct se_dev_entry *deve) | |
928 | { | |
929 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 930 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
931 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
932 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
933 | u16 tpgt; | |
934 | ||
935 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
936 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
937 | /* | |
938 | * Copy Initiator Port information from struct se_node_acl | |
939 | */ | |
940 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
941 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
942 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
943 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
944 | /* |
945 | * Look for the matching registrations+reservation from those | |
946 | * created from APTPL metadata. Note that multiple registrations | |
947 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
948 | * TransportIDs. | |
949 | */ | |
950 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
951 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
952 | pr_reg_aptpl_list) { | |
6708bb27 | 953 | if (!strcmp(pr_reg->pr_iport, i_port) && |
c66ac9db NB |
954 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
955 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
956 | (pr_reg->pr_reg_tpgt == tpgt) && | |
957 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
958 | ||
959 | pr_reg->pr_reg_nacl = nacl; | |
960 | pr_reg->pr_reg_deve = deve; | |
961 | pr_reg->pr_reg_tg_pt_lun = lun; | |
962 | ||
963 | list_del(&pr_reg->pr_reg_aptpl_list); | |
964 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
965 | /* | |
966 | * At this point all of the pointers in *pr_reg will | |
967 | * be setup, so go ahead and add the registration. | |
968 | */ | |
969 | ||
970 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
971 | /* | |
972 | * If this registration is the reservation holder, | |
973 | * make that happen now.. | |
974 | */ | |
975 | if (pr_reg->pr_res_holder) | |
976 | core_scsi3_aptpl_reserve(dev, tpg, | |
977 | nacl, pr_reg); | |
978 | /* | |
979 | * Reenable pr_aptpl_active to accept new metadata | |
980 | * updates once the SCSI device is active again.. | |
981 | */ | |
982 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
983 | pr_tmpl->pr_aptpl_active = 1; | |
984 | } | |
985 | } | |
986 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | int core_scsi3_check_aptpl_registration( | |
992 | struct se_device *dev, | |
993 | struct se_portal_group *tpg, | |
994 | struct se_lun *lun, | |
995 | struct se_lun_acl *lun_acl) | |
996 | { | |
e3d6f909 | 997 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db | 998 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; |
f2083241 | 999 | struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; |
c66ac9db | 1000 | |
e3d6f909 | 1001 | if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) |
c66ac9db NB |
1002 | return 0; |
1003 | ||
1004 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
1005 | lun->unpacked_lun, nacl, deve); | |
1006 | } | |
1007 | ||
1008 | static void __core_scsi3_dump_registration( | |
1009 | struct target_core_fabric_ops *tfo, | |
1010 | struct se_device *dev, | |
1011 | struct se_node_acl *nacl, | |
1012 | struct t10_pr_registration *pr_reg, | |
1013 | int register_type) | |
1014 | { | |
1015 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1016 | char i_buf[PR_REG_ISID_ID_LEN]; | |
1017 | int prf_isid; | |
1018 | ||
1019 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
1020 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1021 | PR_REG_ISID_ID_LEN); | |
1022 | ||
6708bb27 | 1023 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
c66ac9db NB |
1024 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? |
1025 | "_AND_MOVE" : (register_type == 1) ? | |
1026 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, | |
1027 | (prf_isid) ? i_buf : ""); | |
6708bb27 | 1028 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
1029 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1030 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1031 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1032 | " Port(s)\n", tfo->get_fabric_name(), |
1033 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1034 | dev->transport->name); |
6708bb27 | 1035 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1036 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1037 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1038 | pr_reg->pr_reg_aptpl); | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * this function can be called with struct se_device->dev_reservation_lock | |
1043 | * when register_move = 1 | |
1044 | */ | |
1045 | static void __core_scsi3_add_registration( | |
1046 | struct se_device *dev, | |
1047 | struct se_node_acl *nacl, | |
1048 | struct t10_pr_registration *pr_reg, | |
1049 | int register_type, | |
1050 | int register_move) | |
1051 | { | |
e3d6f909 | 1052 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1053 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
1054 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
e3d6f909 | 1055 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1056 | |
1057 | /* | |
1058 | * Increment PRgeneration counter for struct se_device upon a successful | |
1059 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1060 | * | |
1061 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1062 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1063 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1064 | * for the REGISTER. | |
1065 | */ | |
1066 | pr_reg->pr_res_generation = (register_move) ? | |
e3d6f909 | 1067 | su_dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1068 | core_scsi3_pr_generation(dev); |
1069 | ||
1070 | spin_lock(&pr_tmpl->registration_lock); | |
1071 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1072 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1073 | ||
1074 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1075 | spin_unlock(&pr_tmpl->registration_lock); | |
1076 | /* | |
1077 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1078 | */ | |
6708bb27 | 1079 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1080 | return; |
1081 | /* | |
1082 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1083 | * allocated in __core_scsi3_alloc_registration() | |
1084 | */ | |
1085 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1086 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1087 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1088 | ||
1089 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1090 | ||
1091 | spin_lock(&pr_tmpl->registration_lock); | |
1092 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1093 | &pr_tmpl->registration_list); | |
1094 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1095 | ||
1096 | __core_scsi3_dump_registration(tfo, dev, | |
1097 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1098 | register_type); | |
1099 | spin_unlock(&pr_tmpl->registration_lock); | |
1100 | /* | |
1101 | * Drop configfs group dependency reference from | |
1102 | * __core_scsi3_alloc_registration() | |
1103 | */ | |
1104 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | static int core_scsi3_alloc_registration( | |
1109 | struct se_device *dev, | |
1110 | struct se_node_acl *nacl, | |
1111 | struct se_dev_entry *deve, | |
1112 | unsigned char *isid, | |
1113 | u64 sa_res_key, | |
1114 | int all_tg_pt, | |
1115 | int aptpl, | |
1116 | int register_type, | |
1117 | int register_move) | |
1118 | { | |
1119 | struct t10_pr_registration *pr_reg; | |
1120 | ||
1121 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1122 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1123 | if (!pr_reg) |
e3d6f909 | 1124 | return -EPERM; |
c66ac9db NB |
1125 | |
1126 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1127 | register_type, register_move); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1132 | struct se_device *dev, | |
1133 | struct se_node_acl *nacl, | |
1134 | unsigned char *isid) | |
1135 | { | |
e3d6f909 | 1136 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1137 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1138 | struct se_portal_group *tpg; | |
1139 | ||
1140 | spin_lock(&pr_tmpl->registration_lock); | |
1141 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1142 | &pr_tmpl->registration_list, pr_reg_list) { | |
1143 | /* | |
1144 | * First look for a matching struct se_node_acl | |
1145 | */ | |
1146 | if (pr_reg->pr_reg_nacl != nacl) | |
1147 | continue; | |
1148 | ||
1149 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1150 | /* | |
1151 | * If this registration does NOT contain a fabric provided | |
1152 | * ISID, then we have found a match. | |
1153 | */ | |
6708bb27 | 1154 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1155 | /* |
1156 | * Determine if this SCSI device server requires that | |
1157 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1158 | * for fabric modules (iSCSI) requiring them. | |
1159 | */ | |
e3d6f909 AG |
1160 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
1161 | if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) | |
c66ac9db NB |
1162 | continue; |
1163 | } | |
1164 | atomic_inc(&pr_reg->pr_res_holders); | |
1165 | smp_mb__after_atomic_inc(); | |
1166 | spin_unlock(&pr_tmpl->registration_lock); | |
1167 | return pr_reg; | |
1168 | } | |
1169 | /* | |
1170 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1171 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1172 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1173 | */ | |
6708bb27 | 1174 | if (!isid) |
c66ac9db NB |
1175 | continue; |
1176 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1177 | continue; | |
1178 | ||
1179 | atomic_inc(&pr_reg->pr_res_holders); | |
1180 | smp_mb__after_atomic_inc(); | |
1181 | spin_unlock(&pr_tmpl->registration_lock); | |
1182 | return pr_reg; | |
1183 | } | |
1184 | spin_unlock(&pr_tmpl->registration_lock); | |
1185 | ||
1186 | return NULL; | |
1187 | } | |
1188 | ||
1189 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1190 | struct se_device *dev, | |
1191 | struct se_node_acl *nacl, | |
1192 | struct se_session *sess) | |
1193 | { | |
1194 | struct se_portal_group *tpg = nacl->se_tpg; | |
1195 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1196 | ||
e3d6f909 | 1197 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1198 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1199 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1200 | PR_REG_ISID_LEN); |
1201 | isid_ptr = &buf[0]; | |
1202 | } | |
1203 | ||
1204 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1205 | } | |
1206 | ||
1207 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1208 | { | |
1209 | atomic_dec(&pr_reg->pr_res_holders); | |
1210 | smp_mb__after_atomic_dec(); | |
1211 | } | |
1212 | ||
1213 | static int core_scsi3_check_implict_release( | |
1214 | struct se_device *dev, | |
1215 | struct t10_pr_registration *pr_reg) | |
1216 | { | |
1217 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1218 | struct t10_pr_registration *pr_res_holder; | |
1219 | int ret = 0; | |
1220 | ||
1221 | spin_lock(&dev->dev_reservation_lock); | |
1222 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1223 | if (!pr_res_holder) { |
c66ac9db NB |
1224 | spin_unlock(&dev->dev_reservation_lock); |
1225 | return ret; | |
1226 | } | |
1227 | if (pr_res_holder == pr_reg) { | |
1228 | /* | |
1229 | * Perform an implict RELEASE if the registration that | |
1230 | * is being released is holding the reservation. | |
1231 | * | |
1232 | * From spc4r17, section 5.7.11.1: | |
1233 | * | |
1234 | * e) If the I_T nexus is the persistent reservation holder | |
1235 | * and the persistent reservation is not an all registrants | |
1236 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1237 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1238 | * service action with the SERVICE ACTION RESERVATION KEY | |
1239 | * field set to zero (see 5.7.11.3). | |
1240 | */ | |
1241 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); | |
1242 | ret = 1; | |
1243 | /* | |
1244 | * For 'All Registrants' reservation types, all existing | |
1245 | * registrations are still processed as reservation holders | |
1246 | * in core_scsi3_pr_seq_non_holder() after the initial | |
1247 | * reservation holder is implictly released here. | |
1248 | */ | |
1249 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1250 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1251 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1252 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1253 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1254 | " UNREGISTER while existing reservation with matching" |
1255 | " key 0x%016Lx is present from another SCSI Initiator" | |
1256 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1257 | ret = -EPERM; |
c66ac9db NB |
1258 | } |
1259 | spin_unlock(&dev->dev_reservation_lock); | |
1260 | ||
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | /* | |
e3d6f909 | 1265 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1266 | */ |
1267 | static void __core_scsi3_free_registration( | |
1268 | struct se_device *dev, | |
1269 | struct t10_pr_registration *pr_reg, | |
1270 | struct list_head *preempt_and_abort_list, | |
1271 | int dec_holders) | |
1272 | { | |
1273 | struct target_core_fabric_ops *tfo = | |
1274 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; | |
e3d6f909 | 1275 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1276 | char i_buf[PR_REG_ISID_ID_LEN]; |
1277 | int prf_isid; | |
1278 | ||
1279 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1280 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1281 | PR_REG_ISID_ID_LEN); | |
1282 | ||
1283 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1284 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
1285 | list_del(&pr_reg->pr_reg_list); | |
1286 | /* | |
1287 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1288 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1289 | */ | |
1290 | if (dec_holders) | |
1291 | core_scsi3_put_pr_reg(pr_reg); | |
1292 | /* | |
1293 | * Wait until all reference from any other I_T nexuses for this | |
1294 | * *pr_reg have been released. Because list_del() is called above, | |
1295 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1296 | * count back to zero, and we release *pr_reg. | |
1297 | */ | |
1298 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1299 | spin_unlock(&pr_tmpl->registration_lock); | |
6708bb27 | 1300 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1301 | tfo->get_fabric_name()); |
1302 | cpu_relax(); | |
1303 | spin_lock(&pr_tmpl->registration_lock); | |
1304 | } | |
1305 | ||
6708bb27 | 1306 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1307 | " Node: %s%s\n", tfo->get_fabric_name(), |
1308 | pr_reg->pr_reg_nacl->initiatorname, | |
1309 | (prf_isid) ? &i_buf[0] : ""); | |
6708bb27 | 1310 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1311 | " Port(s)\n", tfo->get_fabric_name(), |
1312 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1313 | dev->transport->name); |
6708bb27 | 1314 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1315 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1316 | pr_reg->pr_res_generation); | |
1317 | ||
6708bb27 | 1318 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1319 | pr_reg->pr_reg_deve = NULL; |
1320 | pr_reg->pr_reg_nacl = NULL; | |
1321 | kfree(pr_reg->pr_aptpl_buf); | |
1322 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1323 | return; | |
1324 | } | |
1325 | /* | |
1326 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1327 | * are released once the ABORT_TASK_SET has completed.. | |
1328 | */ | |
1329 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1330 | } | |
1331 | ||
1332 | void core_scsi3_free_pr_reg_from_nacl( | |
1333 | struct se_device *dev, | |
1334 | struct se_node_acl *nacl) | |
1335 | { | |
e3d6f909 | 1336 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1337 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1338 | /* | |
1339 | * If the passed se_node_acl matches the reservation holder, | |
1340 | * release the reservation. | |
1341 | */ | |
1342 | spin_lock(&dev->dev_reservation_lock); | |
1343 | pr_res_holder = dev->dev_pr_res_holder; | |
1344 | if ((pr_res_holder != NULL) && | |
1345 | (pr_res_holder->pr_reg_nacl == nacl)) | |
1346 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); | |
1347 | spin_unlock(&dev->dev_reservation_lock); | |
1348 | /* | |
1349 | * Release any registration associated with the struct se_node_acl. | |
1350 | */ | |
1351 | spin_lock(&pr_tmpl->registration_lock); | |
1352 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1353 | &pr_tmpl->registration_list, pr_reg_list) { | |
1354 | ||
1355 | if (pr_reg->pr_reg_nacl != nacl) | |
1356 | continue; | |
1357 | ||
1358 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1359 | } | |
1360 | spin_unlock(&pr_tmpl->registration_lock); | |
1361 | } | |
1362 | ||
1363 | void core_scsi3_free_all_registrations( | |
1364 | struct se_device *dev) | |
1365 | { | |
e3d6f909 | 1366 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1367 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1368 | ||
1369 | spin_lock(&dev->dev_reservation_lock); | |
1370 | pr_res_holder = dev->dev_pr_res_holder; | |
1371 | if (pr_res_holder != NULL) { | |
1372 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1373 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
1374 | pr_res_holder, 0); | |
1375 | } | |
1376 | spin_unlock(&dev->dev_reservation_lock); | |
1377 | ||
1378 | spin_lock(&pr_tmpl->registration_lock); | |
1379 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1380 | &pr_tmpl->registration_list, pr_reg_list) { | |
1381 | ||
1382 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1383 | } | |
1384 | spin_unlock(&pr_tmpl->registration_lock); | |
1385 | ||
1386 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1387 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1388 | pr_reg_aptpl_list) { | |
1389 | list_del(&pr_reg->pr_reg_aptpl_list); | |
1390 | kfree(pr_reg->pr_aptpl_buf); | |
1391 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1392 | } | |
1393 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1394 | } | |
1395 | ||
1396 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1397 | { | |
e3d6f909 | 1398 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1399 | &tpg->tpg_group.cg_item); |
1400 | } | |
1401 | ||
1402 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1403 | { | |
e3d6f909 | 1404 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1405 | &tpg->tpg_group.cg_item); |
1406 | ||
1407 | atomic_dec(&tpg->tpg_pr_ref_count); | |
1408 | smp_mb__after_atomic_dec(); | |
1409 | } | |
1410 | ||
1411 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1412 | { | |
1413 | struct se_portal_group *tpg = nacl->se_tpg; | |
1414 | ||
1415 | if (nacl->dynamic_node_acl) | |
1416 | return 0; | |
1417 | ||
e3d6f909 | 1418 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1419 | &nacl->acl_group.cg_item); |
1420 | } | |
1421 | ||
1422 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1423 | { | |
1424 | struct se_portal_group *tpg = nacl->se_tpg; | |
1425 | ||
1426 | if (nacl->dynamic_node_acl) { | |
1427 | atomic_dec(&nacl->acl_pr_ref_count); | |
1428 | smp_mb__after_atomic_dec(); | |
1429 | return; | |
1430 | } | |
1431 | ||
e3d6f909 | 1432 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1433 | &nacl->acl_group.cg_item); |
1434 | ||
1435 | atomic_dec(&nacl->acl_pr_ref_count); | |
1436 | smp_mb__after_atomic_dec(); | |
1437 | } | |
1438 | ||
1439 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1440 | { | |
1441 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1442 | struct se_node_acl *nacl; | |
1443 | struct se_portal_group *tpg; | |
1444 | /* | |
1445 | * For nacl->dynamic_node_acl=1 | |
1446 | */ | |
6708bb27 | 1447 | if (!lun_acl) |
c66ac9db NB |
1448 | return 0; |
1449 | ||
1450 | nacl = lun_acl->se_lun_nacl; | |
1451 | tpg = nacl->se_tpg; | |
1452 | ||
e3d6f909 | 1453 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1454 | &lun_acl->se_lun_group.cg_item); |
1455 | } | |
1456 | ||
1457 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1458 | { | |
1459 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1460 | struct se_node_acl *nacl; | |
1461 | struct se_portal_group *tpg; | |
1462 | /* | |
1463 | * For nacl->dynamic_node_acl=1 | |
1464 | */ | |
6708bb27 | 1465 | if (!lun_acl) { |
c66ac9db NB |
1466 | atomic_dec(&se_deve->pr_ref_count); |
1467 | smp_mb__after_atomic_dec(); | |
1468 | return; | |
1469 | } | |
1470 | nacl = lun_acl->se_lun_nacl; | |
1471 | tpg = nacl->se_tpg; | |
1472 | ||
e3d6f909 | 1473 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1474 | &lun_acl->se_lun_group.cg_item); |
1475 | ||
1476 | atomic_dec(&se_deve->pr_ref_count); | |
1477 | smp_mb__after_atomic_dec(); | |
1478 | } | |
1479 | ||
1480 | static int core_scsi3_decode_spec_i_port( | |
1481 | struct se_cmd *cmd, | |
1482 | struct se_portal_group *tpg, | |
1483 | unsigned char *l_isid, | |
1484 | u64 sa_res_key, | |
1485 | int all_tg_pt, | |
1486 | int aptpl) | |
1487 | { | |
5951146d | 1488 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1489 | struct se_port *tmp_port; |
1490 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1491 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
1492 | struct se_node_acl *dest_node_acl = NULL; |
1493 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1494 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1495 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1496 | LIST_HEAD(tid_dest_list); |
c66ac9db NB |
1497 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
1498 | struct target_core_fabric_ops *tmp_tf_ops; | |
05d1c7c0 | 1499 | unsigned char *buf; |
c66ac9db NB |
1500 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; |
1501 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
1502 | u32 tpdl, tid_len = 0; | |
1503 | int ret, dest_local_nexus, prf_isid; | |
1504 | u32 dest_rtpi = 0; | |
1505 | ||
1506 | memset(dest_iport, 0, 64); | |
c66ac9db | 1507 | |
f2083241 | 1508 | local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
1509 | /* |
1510 | * Allocate a struct pr_transport_id_holder and setup the | |
1511 | * local_node_acl and local_se_deve pointers and add to | |
1512 | * struct list_head tid_dest_list for add registration | |
1513 | * processing in the loop of tid_dest_list below. | |
1514 | */ | |
1515 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1516 | if (!tidh_new) { |
1517 | pr_err("Unable to allocate tidh_new\n"); | |
03e98c9e NB |
1518 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1519 | return -EINVAL; | |
c66ac9db NB |
1520 | } |
1521 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1522 | tidh_new->dest_tpg = tpg; | |
1523 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1524 | tidh_new->dest_se_deve = local_se_deve; | |
1525 | ||
5951146d | 1526 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1527 | se_sess->se_node_acl, local_se_deve, l_isid, |
1528 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1529 | if (!local_pr_reg) { |
c66ac9db | 1530 | kfree(tidh_new); |
03e98c9e NB |
1531 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1532 | return -ENOMEM; | |
c66ac9db NB |
1533 | } |
1534 | tidh_new->dest_pr_reg = local_pr_reg; | |
1535 | /* | |
1536 | * The local I_T nexus does not hold any configfs dependances, | |
1537 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1538 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1539 | */ | |
1540 | tidh_new->dest_local_nexus = 1; | |
1541 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
05d1c7c0 | 1542 | |
4949314c | 1543 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
1544 | /* |
1545 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1546 | * first extract TransportID Parameter Data Length, and make sure | |
1547 | * the value matches up to the SCSI expected data transfer length. | |
1548 | */ | |
1549 | tpdl = (buf[24] & 0xff) << 24; | |
1550 | tpdl |= (buf[25] & 0xff) << 16; | |
1551 | tpdl |= (buf[26] & 0xff) << 8; | |
1552 | tpdl |= buf[27] & 0xff; | |
1553 | ||
1554 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1555 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1556 | " does not equal CDB data_length: %u\n", tpdl, |
1557 | cmd->data_length); | |
03e98c9e NB |
1558 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1559 | ret = -EINVAL; | |
c66ac9db NB |
1560 | goto out; |
1561 | } | |
1562 | /* | |
1563 | * Start processing the received transport IDs using the | |
1564 | * receiving I_T Nexus portal's fabric dependent methods to | |
1565 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1566 | */ | |
1567 | ptr = &buf[28]; | |
1568 | ||
1569 | while (tpdl > 0) { | |
1570 | proto_ident = (ptr[0] & 0x0f); | |
1571 | dest_tpg = NULL; | |
1572 | ||
1573 | spin_lock(&dev->se_port_lock); | |
1574 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1575 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1576 | if (!tmp_tpg) |
c66ac9db | 1577 | continue; |
e3d6f909 | 1578 | tmp_tf_ops = tmp_tpg->se_tpg_tfo; |
6708bb27 | 1579 | if (!tmp_tf_ops) |
c66ac9db | 1580 | continue; |
6708bb27 AG |
1581 | if (!tmp_tf_ops->get_fabric_proto_ident || |
1582 | !tmp_tf_ops->tpg_parse_pr_out_transport_id) | |
c66ac9db NB |
1583 | continue; |
1584 | /* | |
1585 | * Look for the matching proto_ident provided by | |
1586 | * the received TransportID | |
1587 | */ | |
1588 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); | |
1589 | if (tmp_proto_ident != proto_ident) | |
1590 | continue; | |
1591 | dest_rtpi = tmp_port->sep_rtpi; | |
1592 | ||
1593 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( | |
1594 | tmp_tpg, (const char *)ptr, &tid_len, | |
1595 | &iport_ptr); | |
6708bb27 | 1596 | if (!i_str) |
c66ac9db NB |
1597 | continue; |
1598 | ||
1599 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); | |
1600 | smp_mb__after_atomic_inc(); | |
1601 | spin_unlock(&dev->se_port_lock); | |
1602 | ||
1603 | ret = core_scsi3_tpg_depend_item(tmp_tpg); | |
1604 | if (ret != 0) { | |
6708bb27 | 1605 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db NB |
1606 | " for tmp_tpg\n"); |
1607 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); | |
1608 | smp_mb__after_atomic_dec(); | |
03e98c9e NB |
1609 | cmd->scsi_sense_reason = |
1610 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1611 | ret = -EINVAL; | |
c66ac9db NB |
1612 | goto out; |
1613 | } | |
1614 | /* | |
1615 | * Locate the desination initiator ACL to be registered | |
1616 | * from the decoded fabric module specific TransportID | |
1617 | * at *i_str. | |
1618 | */ | |
28638887 | 1619 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db NB |
1620 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1621 | tmp_tpg, i_str); | |
1622 | if (dest_node_acl) { | |
1623 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
1624 | smp_mb__after_atomic_inc(); | |
1625 | } | |
28638887 | 1626 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db | 1627 | |
6708bb27 | 1628 | if (!dest_node_acl) { |
c66ac9db NB |
1629 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1630 | spin_lock(&dev->se_port_lock); | |
1631 | continue; | |
1632 | } | |
1633 | ||
1634 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
1635 | if (ret != 0) { | |
6708bb27 | 1636 | pr_err("configfs_depend_item() failed" |
c66ac9db NB |
1637 | " for dest_node_acl->acl_group\n"); |
1638 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
1639 | smp_mb__after_atomic_dec(); | |
1640 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
03e98c9e NB |
1641 | cmd->scsi_sense_reason = |
1642 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1643 | ret = -EINVAL; | |
c66ac9db NB |
1644 | goto out; |
1645 | } | |
1646 | ||
1647 | dest_tpg = tmp_tpg; | |
6708bb27 | 1648 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1649 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1650 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1651 | dest_node_acl->initiatorname, dest_rtpi); |
1652 | ||
1653 | spin_lock(&dev->se_port_lock); | |
1654 | break; | |
1655 | } | |
1656 | spin_unlock(&dev->se_port_lock); | |
1657 | ||
6708bb27 AG |
1658 | if (!dest_tpg) { |
1659 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1660 | " dest_tpg\n"); |
03e98c9e NB |
1661 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1662 | ret = -EINVAL; | |
c66ac9db NB |
1663 | goto out; |
1664 | } | |
8b1e1244 | 1665 | |
6708bb27 | 1666 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1667 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1668 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db | 1669 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1670 | |
c66ac9db | 1671 | if (tid_len > tpdl) { |
6708bb27 | 1672 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1673 | " %u for Transport ID: %s\n", tid_len, ptr); |
1674 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1675 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1676 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1677 | ret = -EINVAL; | |
c66ac9db NB |
1678 | goto out; |
1679 | } | |
1680 | /* | |
1681 | * Locate the desintation struct se_dev_entry pointer for matching | |
1682 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1683 | * Target Port. | |
1684 | */ | |
1685 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1686 | dest_rtpi); | |
6708bb27 AG |
1687 | if (!dest_se_deve) { |
1688 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1689 | " from destination RTPI: %hu\n", |
e3d6f909 | 1690 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1691 | dest_rtpi); |
1692 | ||
1693 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1694 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1695 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1696 | ret = -EINVAL; | |
c66ac9db NB |
1697 | goto out; |
1698 | } | |
1699 | ||
1700 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
1701 | if (ret < 0) { | |
6708bb27 | 1702 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db NB |
1703 | " failed\n"); |
1704 | atomic_dec(&dest_se_deve->pr_ref_count); | |
1705 | smp_mb__after_atomic_dec(); | |
1706 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1707 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1708 | cmd->scsi_sense_reason = |
1709 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1710 | ret = -EINVAL; | |
c66ac9db NB |
1711 | goto out; |
1712 | } | |
8b1e1244 | 1713 | |
6708bb27 | 1714 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1715 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1716 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 1717 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1718 | |
c66ac9db NB |
1719 | /* |
1720 | * Skip any TransportIDs that already have a registration for | |
1721 | * this target port. | |
1722 | */ | |
1723 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1724 | iport_ptr); | |
1725 | if (pr_reg_e) { | |
1726 | core_scsi3_put_pr_reg(pr_reg_e); | |
1727 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1728 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1729 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1730 | ptr += tid_len; | |
1731 | tpdl -= tid_len; | |
1732 | tid_len = 0; | |
1733 | continue; | |
1734 | } | |
1735 | /* | |
1736 | * Allocate a struct pr_transport_id_holder and setup | |
1737 | * the dest_node_acl and dest_se_deve pointers for the | |
1738 | * loop below. | |
1739 | */ | |
1740 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1741 | GFP_KERNEL); | |
6708bb27 AG |
1742 | if (!tidh_new) { |
1743 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1744 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1745 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1746 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1747 | cmd->scsi_sense_reason = |
1748 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1749 | ret = -ENOMEM; | |
c66ac9db NB |
1750 | goto out; |
1751 | } | |
1752 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1753 | tidh_new->dest_tpg = dest_tpg; | |
1754 | tidh_new->dest_node_acl = dest_node_acl; | |
1755 | tidh_new->dest_se_deve = dest_se_deve; | |
1756 | ||
1757 | /* | |
1758 | * Allocate, but do NOT add the registration for the | |
1759 | * TransportID referenced SCSI Initiator port. This | |
1760 | * done because of the following from spc4r17 in section | |
1761 | * 6.14.3 wrt SPEC_I_PT: | |
1762 | * | |
1763 | * "If a registration fails for any initiator port (e.g., if th | |
1764 | * logical unit does not have enough resources available to | |
1765 | * hold the registration information), no registrations shall be | |
1766 | * made, and the command shall be terminated with | |
1767 | * CHECK CONDITION status." | |
1768 | * | |
1769 | * That means we call __core_scsi3_alloc_registration() here, | |
1770 | * and then call __core_scsi3_add_registration() in the | |
1771 | * 2nd loop which will never fail. | |
1772 | */ | |
5951146d | 1773 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1774 | dest_node_acl, dest_se_deve, iport_ptr, |
1775 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1776 | if (!dest_pr_reg) { |
c66ac9db NB |
1777 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1778 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1779 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1780 | kfree(tidh_new); | |
03e98c9e NB |
1781 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1782 | ret = -EINVAL; | |
c66ac9db NB |
1783 | goto out; |
1784 | } | |
1785 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1786 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1787 | ||
1788 | ptr += tid_len; | |
1789 | tpdl -= tid_len; | |
1790 | tid_len = 0; | |
1791 | ||
1792 | } | |
05d1c7c0 | 1793 | |
4949314c | 1794 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1795 | |
c66ac9db NB |
1796 | /* |
1797 | * Go ahead and create a registrations from tid_dest_list for the | |
1798 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1799 | * and dest_se_deve. | |
1800 | * | |
1801 | * The SA Reservation Key from the PROUT is set for the | |
1802 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1803 | * means that the TransportID Initiator port will be | |
1804 | * registered on all of the target ports in the SCSI target device | |
1805 | * ALL_TG_PT=0 means the registration will only be for the | |
1806 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1807 | * was received. | |
1808 | */ | |
1809 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1810 | dest_tpg = tidh->dest_tpg; | |
1811 | dest_node_acl = tidh->dest_node_acl; | |
1812 | dest_se_deve = tidh->dest_se_deve; | |
1813 | dest_pr_reg = tidh->dest_pr_reg; | |
1814 | dest_local_nexus = tidh->dest_local_nexus; | |
1815 | ||
1816 | list_del(&tidh->dest_list); | |
1817 | kfree(tidh); | |
1818 | ||
1819 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1820 | prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], | |
1821 | PR_REG_ISID_ID_LEN); | |
1822 | ||
5951146d | 1823 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1824 | dest_pr_reg, 0, 0); |
1825 | ||
6708bb27 | 1826 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1827 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1828 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1829 | dest_node_acl->initiatorname, (prf_isid) ? |
1830 | &i_buf[0] : "", dest_se_deve->mapped_lun); | |
1831 | ||
1832 | if (dest_local_nexus) | |
1833 | continue; | |
1834 | ||
1835 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1836 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1837 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1838 | } | |
1839 | ||
1840 | return 0; | |
1841 | out: | |
4949314c | 1842 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
1843 | /* |
1844 | * For the failure case, release everything from tid_dest_list | |
1845 | * including *dest_pr_reg and the configfs dependances.. | |
1846 | */ | |
1847 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1848 | dest_tpg = tidh->dest_tpg; | |
1849 | dest_node_acl = tidh->dest_node_acl; | |
1850 | dest_se_deve = tidh->dest_se_deve; | |
1851 | dest_pr_reg = tidh->dest_pr_reg; | |
1852 | dest_local_nexus = tidh->dest_local_nexus; | |
1853 | ||
1854 | list_del(&tidh->dest_list); | |
1855 | kfree(tidh); | |
1856 | /* | |
1857 | * Release any extra ALL_TG_PT=1 registrations for | |
1858 | * the SPEC_I_PT=1 case. | |
1859 | */ | |
1860 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1861 | &dest_pr_reg->pr_reg_atp_list, | |
1862 | pr_reg_atp_mem_list) { | |
1863 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1864 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1865 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1866 | } | |
1867 | ||
1868 | kfree(dest_pr_reg->pr_aptpl_buf); | |
1869 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); | |
1870 | ||
1871 | if (dest_local_nexus) | |
1872 | continue; | |
1873 | ||
1874 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1875 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1876 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1877 | } | |
1878 | return ret; | |
1879 | } | |
1880 | ||
1881 | /* | |
1882 | * Called with struct se_device->dev_reservation_lock held | |
1883 | */ | |
1884 | static int __core_scsi3_update_aptpl_buf( | |
1885 | struct se_device *dev, | |
1886 | unsigned char *buf, | |
1887 | u32 pr_aptpl_buf_len, | |
1888 | int clear_aptpl_metadata) | |
1889 | { | |
1890 | struct se_lun *lun; | |
1891 | struct se_portal_group *tpg; | |
e3d6f909 | 1892 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1893 | struct t10_pr_registration *pr_reg; |
1894 | unsigned char tmp[512], isid_buf[32]; | |
1895 | ssize_t len = 0; | |
1896 | int reg_count = 0; | |
1897 | ||
1898 | memset(buf, 0, pr_aptpl_buf_len); | |
1899 | /* | |
1900 | * Called to clear metadata once APTPL has been deactivated. | |
1901 | */ | |
1902 | if (clear_aptpl_metadata) { | |
1903 | snprintf(buf, pr_aptpl_buf_len, | |
1904 | "No Registrations or Reservations\n"); | |
1905 | return 0; | |
1906 | } | |
1907 | /* | |
1908 | * Walk the registration list.. | |
1909 | */ | |
e3d6f909 AG |
1910 | spin_lock(&su_dev->t10_pr.registration_lock); |
1911 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
1912 | pr_reg_list) { |
1913 | ||
1914 | tmp[0] = '\0'; | |
1915 | isid_buf[0] = '\0'; | |
1916 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1917 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1918 | /* | |
1919 | * Write out any ISID value to APTPL metadata that was included | |
1920 | * in the original registration. | |
1921 | */ | |
1922 | if (pr_reg->isid_present_at_reg) | |
1923 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1924 | pr_reg->pr_reg_isid); | |
1925 | /* | |
1926 | * Include special metadata if the pr_reg matches the | |
1927 | * reservation holder. | |
1928 | */ | |
1929 | if (dev->dev_pr_res_holder == pr_reg) { | |
1930 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1931 | "\ninitiator_fabric=%s\n" | |
1932 | "initiator_node=%s\n%s" | |
1933 | "sa_res_key=%llu\n" | |
1934 | "res_holder=1\nres_type=%02x\n" | |
1935 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1936 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1937 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1938 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1939 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1940 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1941 | pr_reg->pr_res_mapped_lun); | |
1942 | } else { | |
1943 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1944 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1945 | "sa_res_key=%llu\nres_holder=0\n" | |
1946 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1947 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1948 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1949 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1950 | pr_reg->pr_res_mapped_lun); | |
1951 | } | |
1952 | ||
60d645a4 | 1953 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1954 | pr_err("Unable to update renaming" |
c66ac9db | 1955 | " APTPL metadata\n"); |
e3d6f909 AG |
1956 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1957 | return -EMSGSIZE; | |
c66ac9db NB |
1958 | } |
1959 | len += sprintf(buf+len, "%s", tmp); | |
1960 | ||
1961 | /* | |
1962 | * Include information about the associated SCSI target port. | |
1963 | */ | |
1964 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1965 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1966 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1967 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1968 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1969 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
1970 | ||
60d645a4 | 1971 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1972 | pr_err("Unable to update renaming" |
c66ac9db | 1973 | " APTPL metadata\n"); |
e3d6f909 AG |
1974 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1975 | return -EMSGSIZE; | |
c66ac9db NB |
1976 | } |
1977 | len += sprintf(buf+len, "%s", tmp); | |
1978 | reg_count++; | |
1979 | } | |
e3d6f909 | 1980 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db | 1981 | |
6708bb27 | 1982 | if (!reg_count) |
c66ac9db NB |
1983 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1984 | ||
1985 | return 0; | |
1986 | } | |
1987 | ||
1988 | static int core_scsi3_update_aptpl_buf( | |
1989 | struct se_device *dev, | |
1990 | unsigned char *buf, | |
1991 | u32 pr_aptpl_buf_len, | |
1992 | int clear_aptpl_metadata) | |
1993 | { | |
1994 | int ret; | |
1995 | ||
1996 | spin_lock(&dev->dev_reservation_lock); | |
1997 | ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
1998 | clear_aptpl_metadata); | |
1999 | spin_unlock(&dev->dev_reservation_lock); | |
2000 | ||
2001 | return ret; | |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * Called with struct se_device->aptpl_file_mutex held | |
2006 | */ | |
2007 | static int __core_scsi3_write_aptpl_to_file( | |
2008 | struct se_device *dev, | |
2009 | unsigned char *buf, | |
2010 | u32 pr_aptpl_buf_len) | |
2011 | { | |
e3d6f909 | 2012 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
2013 | struct file *file; |
2014 | struct iovec iov[1]; | |
2015 | mm_segment_t old_fs; | |
2016 | int flags = O_RDWR | O_CREAT | O_TRUNC; | |
2017 | char path[512]; | |
2018 | int ret; | |
2019 | ||
2020 | memset(iov, 0, sizeof(struct iovec)); | |
2021 | memset(path, 0, 512); | |
2022 | ||
60d645a4 | 2023 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 2024 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 2025 | " into path buffer\n"); |
e3d6f909 | 2026 | return -EMSGSIZE; |
c66ac9db NB |
2027 | } |
2028 | ||
2029 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
2030 | file = filp_open(path, flags, 0600); | |
2031 | if (IS_ERR(file) || !file || !file->f_dentry) { | |
6708bb27 | 2032 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 2033 | " failed\n", path); |
e3d6f909 | 2034 | return (PTR_ERR(file) < 0 ? PTR_ERR(file) : -ENOENT); |
c66ac9db NB |
2035 | } |
2036 | ||
2037 | iov[0].iov_base = &buf[0]; | |
6708bb27 | 2038 | if (!pr_aptpl_buf_len) |
c66ac9db NB |
2039 | iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ |
2040 | else | |
2041 | iov[0].iov_len = pr_aptpl_buf_len; | |
2042 | ||
2043 | old_fs = get_fs(); | |
2044 | set_fs(get_ds()); | |
2045 | ret = vfs_writev(file, &iov[0], 1, &file->f_pos); | |
2046 | set_fs(old_fs); | |
2047 | ||
2048 | if (ret < 0) { | |
6708bb27 | 2049 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
c66ac9db | 2050 | filp_close(file, NULL); |
e3d6f909 | 2051 | return -EIO; |
c66ac9db NB |
2052 | } |
2053 | filp_close(file, NULL); | |
2054 | ||
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | static int core_scsi3_update_and_write_aptpl( | |
2059 | struct se_device *dev, | |
2060 | unsigned char *in_buf, | |
2061 | u32 in_pr_aptpl_buf_len) | |
2062 | { | |
2063 | unsigned char null_buf[64], *buf; | |
2064 | u32 pr_aptpl_buf_len; | |
2065 | int ret, clear_aptpl_metadata = 0; | |
2066 | /* | |
2067 | * Can be called with a NULL pointer from PROUT service action CLEAR | |
2068 | */ | |
6708bb27 | 2069 | if (!in_buf) { |
c66ac9db NB |
2070 | memset(null_buf, 0, 64); |
2071 | buf = &null_buf[0]; | |
2072 | /* | |
2073 | * This will clear the APTPL metadata to: | |
2074 | * "No Registrations or Reservations" status | |
2075 | */ | |
2076 | pr_aptpl_buf_len = 64; | |
2077 | clear_aptpl_metadata = 1; | |
2078 | } else { | |
2079 | buf = in_buf; | |
2080 | pr_aptpl_buf_len = in_pr_aptpl_buf_len; | |
2081 | } | |
2082 | ||
2083 | ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2084 | clear_aptpl_metadata); | |
2085 | if (ret != 0) | |
e3d6f909 | 2086 | return ret; |
c66ac9db NB |
2087 | /* |
2088 | * __core_scsi3_write_aptpl_to_file() will call strlen() | |
2089 | * on the passed buf to determine pr_aptpl_buf_len. | |
2090 | */ | |
2091 | ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); | |
2092 | if (ret != 0) | |
e3d6f909 | 2093 | return ret; |
c66ac9db NB |
2094 | |
2095 | return ret; | |
2096 | } | |
2097 | ||
2098 | static int core_scsi3_emulate_pro_register( | |
2099 | struct se_cmd *cmd, | |
2100 | u64 res_key, | |
2101 | u64 sa_res_key, | |
2102 | int aptpl, | |
2103 | int all_tg_pt, | |
2104 | int spec_i_pt, | |
2105 | int ignore_key) | |
2106 | { | |
e3d6f909 | 2107 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2108 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2109 | struct se_dev_entry *se_deve; |
e3d6f909 | 2110 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
2111 | struct se_portal_group *se_tpg; |
2112 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; | |
e3d6f909 | 2113 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2114 | /* Used for APTPL metadata w/ UNREGISTER */ |
2115 | unsigned char *pr_aptpl_buf = NULL; | |
2116 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
2117 | int pr_holder = 0, ret = 0, type; | |
2118 | ||
6708bb27 AG |
2119 | if (!se_sess || !se_lun) { |
2120 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2121 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2122 | return -EINVAL; | |
c66ac9db NB |
2123 | } |
2124 | se_tpg = se_sess->se_tpg; | |
f2083241 | 2125 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db | 2126 | |
e3d6f909 | 2127 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2128 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2129 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2130 | PR_REG_ISID_LEN); |
2131 | isid_ptr = &isid_buf[0]; | |
2132 | } | |
2133 | /* | |
2134 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2135 | */ | |
2136 | pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 | 2137 | if (!pr_reg_e) { |
c66ac9db | 2138 | if (res_key) { |
6708bb27 | 2139 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2140 | " for SA REGISTER, returning CONFLICT\n"); |
03e98c9e NB |
2141 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2142 | return -EINVAL; | |
c66ac9db NB |
2143 | } |
2144 | /* | |
2145 | * Do nothing but return GOOD status. | |
2146 | */ | |
6708bb27 | 2147 | if (!sa_res_key) |
03e98c9e | 2148 | return 0; |
c66ac9db | 2149 | |
6708bb27 | 2150 | if (!spec_i_pt) { |
c66ac9db NB |
2151 | /* |
2152 | * Perform the Service Action REGISTER on the Initiator | |
2153 | * Port Endpoint that the PRO was received from on the | |
2154 | * Logical Unit of the SCSI device server. | |
2155 | */ | |
5951146d | 2156 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
2157 | se_sess->se_node_acl, se_deve, isid_ptr, |
2158 | sa_res_key, all_tg_pt, aptpl, | |
2159 | ignore_key, 0); | |
2160 | if (ret != 0) { | |
6708bb27 | 2161 | pr_err("Unable to allocate" |
c66ac9db | 2162 | " struct t10_pr_registration\n"); |
03e98c9e NB |
2163 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2164 | return -EINVAL; | |
c66ac9db NB |
2165 | } |
2166 | } else { | |
2167 | /* | |
2168 | * Register both the Initiator port that received | |
2169 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2170 | * TransportID from Parameter list and loop through | |
2171 | * fabric dependent parameter list while calling | |
2172 | * logic from of core_scsi3_alloc_registration() for | |
2173 | * each TransportID provided SCSI Initiator Port/Device | |
2174 | */ | |
2175 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2176 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2177 | if (ret != 0) | |
2178 | return ret; | |
2179 | } | |
2180 | /* | |
2181 | * Nothing left to do for the APTPL=0 case. | |
2182 | */ | |
6708bb27 | 2183 | if (!aptpl) { |
c66ac9db | 2184 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 2185 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2186 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
2187 | " REGISTER\n"); |
2188 | return 0; | |
2189 | } | |
2190 | /* | |
2191 | * Locate the newly allocated local I_T Nexus *pr_reg, and | |
2192 | * update the APTPL metadata information using its | |
2193 | * preallocated *pr_reg->pr_aptpl_buf. | |
2194 | */ | |
5951146d | 2195 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db NB |
2196 | se_sess->se_node_acl, se_sess); |
2197 | ||
5951146d | 2198 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2199 | &pr_reg->pr_aptpl_buf[0], |
2200 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2201 | if (!ret) { |
c66ac9db | 2202 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2203 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); |
c66ac9db NB |
2204 | } |
2205 | ||
2206 | core_scsi3_put_pr_reg(pr_reg); | |
2207 | return ret; | |
2208 | } else { | |
2209 | /* | |
2210 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2211 | */ | |
2212 | pr_reg = pr_reg_e; | |
2213 | type = pr_reg->pr_res_type; | |
2214 | ||
6708bb27 | 2215 | if (!ignore_key) { |
c66ac9db | 2216 | if (res_key != pr_reg->pr_res_key) { |
6708bb27 | 2217 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2218 | " res_key: 0x%016Lx does not match" |
2219 | " existing SA REGISTER res_key:" | |
2220 | " 0x%016Lx\n", res_key, | |
2221 | pr_reg->pr_res_key); | |
2222 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2223 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2224 | return -EINVAL; | |
c66ac9db NB |
2225 | } |
2226 | } | |
2227 | if (spec_i_pt) { | |
6708bb27 | 2228 | pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" |
c66ac9db NB |
2229 | " set while sa_res_key=0\n"); |
2230 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2231 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2232 | return -EINVAL; | |
c66ac9db NB |
2233 | } |
2234 | /* | |
2235 | * An existing ALL_TG_PT=1 registration being released | |
2236 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2237 | */ | |
2238 | if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { | |
6708bb27 | 2239 | pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" |
c66ac9db NB |
2240 | " registration exists, but ALL_TG_PT=1 bit not" |
2241 | " present in received PROUT\n"); | |
2242 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2243 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2244 | return -EINVAL; | |
c66ac9db NB |
2245 | } |
2246 | /* | |
2247 | * Allocate APTPL metadata buffer used for UNREGISTER ops | |
2248 | */ | |
2249 | if (aptpl) { | |
2250 | pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, | |
2251 | GFP_KERNEL); | |
6708bb27 AG |
2252 | if (!pr_aptpl_buf) { |
2253 | pr_err("Unable to allocate" | |
c66ac9db NB |
2254 | " pr_aptpl_buf\n"); |
2255 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2256 | cmd->scsi_sense_reason = |
2257 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2258 | return -EINVAL; | |
c66ac9db NB |
2259 | } |
2260 | } | |
2261 | /* | |
2262 | * sa_res_key=0 Unregister Reservation Key for registered I_T | |
2263 | * Nexus sa_res_key=1 Change Reservation Key for registered I_T | |
2264 | * Nexus. | |
2265 | */ | |
6708bb27 | 2266 | if (!sa_res_key) { |
c66ac9db | 2267 | pr_holder = core_scsi3_check_implict_release( |
5951146d | 2268 | cmd->se_dev, pr_reg); |
c66ac9db NB |
2269 | if (pr_holder < 0) { |
2270 | kfree(pr_aptpl_buf); | |
2271 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2272 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2273 | return -EINVAL; | |
c66ac9db NB |
2274 | } |
2275 | ||
2276 | spin_lock(&pr_tmpl->registration_lock); | |
2277 | /* | |
2278 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port | |
2279 | * and matching pr_res_key. | |
2280 | */ | |
2281 | if (pr_reg->pr_reg_all_tg_pt) { | |
2282 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2283 | &pr_tmpl->registration_list, | |
2284 | pr_reg_list) { | |
2285 | ||
6708bb27 | 2286 | if (!pr_reg_p->pr_reg_all_tg_pt) |
c66ac9db NB |
2287 | continue; |
2288 | ||
2289 | if (pr_reg_p->pr_res_key != res_key) | |
2290 | continue; | |
2291 | ||
2292 | if (pr_reg == pr_reg_p) | |
2293 | continue; | |
2294 | ||
2295 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2296 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2297 | continue; | |
2298 | ||
2299 | __core_scsi3_free_registration(dev, | |
2300 | pr_reg_p, NULL, 0); | |
2301 | } | |
2302 | } | |
2303 | /* | |
2304 | * Release the calling I_T Nexus registration now.. | |
2305 | */ | |
5951146d | 2306 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, |
c66ac9db NB |
2307 | NULL, 1); |
2308 | /* | |
2309 | * From spc4r17, section 5.7.11.3 Unregistering | |
2310 | * | |
2311 | * If the persistent reservation is a registrants only | |
2312 | * type, the device server shall establish a unit | |
2313 | * attention condition for the initiator port associated | |
2314 | * with every registered I_T nexus except for the I_T | |
2315 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2316 | * received, with the additional sense code set to | |
2317 | * RESERVATIONS RELEASED. | |
2318 | */ | |
2319 | if (pr_holder && | |
2320 | ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
2321 | (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { | |
2322 | list_for_each_entry(pr_reg_p, | |
2323 | &pr_tmpl->registration_list, | |
2324 | pr_reg_list) { | |
2325 | ||
2326 | core_scsi3_ua_allocate( | |
2327 | pr_reg_p->pr_reg_nacl, | |
2328 | pr_reg_p->pr_res_mapped_lun, | |
2329 | 0x2A, | |
2330 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
2331 | } | |
2332 | } | |
2333 | spin_unlock(&pr_tmpl->registration_lock); | |
2334 | ||
6708bb27 | 2335 | if (!aptpl) { |
c66ac9db NB |
2336 | pr_tmpl->pr_aptpl_active = 0; |
2337 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
6708bb27 | 2338 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2339 | " for UNREGISTER\n"); |
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2344 | &pr_aptpl_buf[0], | |
2345 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2346 | if (!ret) { |
c66ac9db | 2347 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2348 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2349 | " for UNREGISTER\n"); |
2350 | } | |
2351 | ||
2352 | kfree(pr_aptpl_buf); | |
2353 | return ret; | |
2354 | } else { | |
2355 | /* | |
2356 | * Increment PRgeneration counter for struct se_device" | |
2357 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2358 | * READ_KEYS service action. | |
2359 | */ | |
2360 | pr_reg->pr_res_generation = core_scsi3_pr_generation( | |
5951146d | 2361 | cmd->se_dev); |
c66ac9db | 2362 | pr_reg->pr_res_key = sa_res_key; |
6708bb27 | 2363 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" |
c66ac9db | 2364 | " Key for %s to: 0x%016Lx PRgeneration:" |
e3d6f909 | 2365 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2366 | (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", |
2367 | pr_reg->pr_reg_nacl->initiatorname, | |
2368 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2369 | ||
6708bb27 | 2370 | if (!aptpl) { |
c66ac9db NB |
2371 | pr_tmpl->pr_aptpl_active = 0; |
2372 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2373 | core_scsi3_put_pr_reg(pr_reg); | |
6708bb27 | 2374 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2375 | " for REGISTER\n"); |
2376 | return 0; | |
2377 | } | |
2378 | ||
2379 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2380 | &pr_aptpl_buf[0], | |
2381 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2382 | if (!ret) { |
c66ac9db | 2383 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2384 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2385 | " for REGISTER\n"); |
2386 | } | |
2387 | ||
2388 | kfree(pr_aptpl_buf); | |
2389 | core_scsi3_put_pr_reg(pr_reg); | |
2390 | } | |
2391 | } | |
2392 | return 0; | |
2393 | } | |
2394 | ||
2395 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2396 | { | |
2397 | switch (type) { | |
2398 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2399 | return "Write Exclusive Access"; | |
2400 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2401 | return "Exclusive Access"; | |
2402 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2403 | return "Write Exclusive Access, Registrants Only"; | |
2404 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2405 | return "Exclusive Access, Registrants Only"; | |
2406 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2407 | return "Write Exclusive Access, All Registrants"; | |
2408 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2409 | return "Exclusive Access, All Registrants"; | |
2410 | default: | |
2411 | break; | |
2412 | } | |
2413 | ||
2414 | return "Unknown SPC-3 PR Type"; | |
2415 | } | |
2416 | ||
2417 | static int core_scsi3_pro_reserve( | |
2418 | struct se_cmd *cmd, | |
2419 | struct se_device *dev, | |
2420 | int type, | |
2421 | int scope, | |
2422 | u64 res_key) | |
2423 | { | |
e3d6f909 | 2424 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2425 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2426 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
e3d6f909 | 2427 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2428 | char i_buf[PR_REG_ISID_ID_LEN]; |
2429 | int ret, prf_isid; | |
2430 | ||
2431 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2432 | ||
6708bb27 AG |
2433 | if (!se_sess || !se_lun) { |
2434 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2435 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2436 | return -EINVAL; | |
c66ac9db | 2437 | } |
c66ac9db NB |
2438 | /* |
2439 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2440 | */ | |
5951146d | 2441 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2442 | se_sess); |
6708bb27 AG |
2443 | if (!pr_reg) { |
2444 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2445 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
03e98c9e NB |
2446 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2447 | return -EINVAL; | |
c66ac9db NB |
2448 | } |
2449 | /* | |
2450 | * From spc4r17 Section 5.7.9: Reserving: | |
2451 | * | |
2452 | * An application client creates a persistent reservation by issuing | |
2453 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2454 | * a registered I_T nexus with the following parameters: | |
2455 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2456 | * registered with the logical unit for the I_T nexus; and | |
2457 | */ | |
2458 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2459 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2460 | " does not match existing SA REGISTER res_key:" |
2461 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2462 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2463 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2464 | return -EINVAL; | |
c66ac9db NB |
2465 | } |
2466 | /* | |
2467 | * From spc4r17 Section 5.7.9: Reserving: | |
2468 | * | |
2469 | * From above: | |
2470 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2471 | * being created. | |
2472 | * | |
2473 | * Only one persistent reservation is allowed at a time per logical unit | |
2474 | * and that persistent reservation has a scope of LU_SCOPE. | |
2475 | */ | |
2476 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2477 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2478 | core_scsi3_put_pr_reg(pr_reg); |
03e98c9e NB |
2479 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2480 | return -EINVAL; | |
c66ac9db NB |
2481 | } |
2482 | /* | |
2483 | * See if we have an existing PR reservation holder pointer at | |
2484 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2485 | * *pr_res_holder. | |
2486 | */ | |
2487 | spin_lock(&dev->dev_reservation_lock); | |
2488 | pr_res_holder = dev->dev_pr_res_holder; | |
2489 | if ((pr_res_holder)) { | |
2490 | /* | |
2491 | * From spc4r17 Section 5.7.9: Reserving: | |
2492 | * | |
2493 | * If the device server receives a PERSISTENT RESERVE OUT | |
2494 | * command from an I_T nexus other than a persistent reservation | |
2495 | * holder (see 5.7.10) that attempts to create a persistent | |
2496 | * reservation when a persistent reservation already exists for | |
2497 | * the logical unit, then the command shall be completed with | |
2498 | * RESERVATION CONFLICT status. | |
2499 | */ | |
2500 | if (pr_res_holder != pr_reg) { | |
2501 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2502 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2503 | " [%s]: %s while reservation already held by" |
2504 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2505 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2506 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2507 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2508 | pr_res_holder->pr_reg_nacl->initiatorname); |
2509 | ||
2510 | spin_unlock(&dev->dev_reservation_lock); | |
2511 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2512 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2513 | return -EINVAL; | |
c66ac9db NB |
2514 | } |
2515 | /* | |
2516 | * From spc4r17 Section 5.7.9: Reserving: | |
2517 | * | |
2518 | * If a persistent reservation holder attempts to modify the | |
2519 | * type or scope of an existing persistent reservation, the | |
2520 | * command shall be completed with RESERVATION CONFLICT status. | |
2521 | */ | |
2522 | if ((pr_res_holder->pr_res_type != type) || | |
2523 | (pr_res_holder->pr_res_scope != scope)) { | |
2524 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2525 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2526 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2527 | " while reservation already held by [%s]: %s," | |
2528 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2529 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2530 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2531 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2532 | pr_res_holder->pr_reg_nacl->initiatorname); |
2533 | ||
2534 | spin_unlock(&dev->dev_reservation_lock); | |
2535 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2536 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2537 | return -EINVAL; | |
c66ac9db NB |
2538 | } |
2539 | /* | |
2540 | * From spc4r17 Section 5.7.9: Reserving: | |
2541 | * | |
2542 | * If the device server receives a PERSISTENT RESERVE OUT | |
2543 | * command with RESERVE service action where the TYPE field and | |
2544 | * the SCOPE field contain the same values as the existing type | |
2545 | * and scope from a persistent reservation holder, it shall not | |
2546 | * make any change to the existing persistent reservation and | |
2547 | * shall completethe command with GOOD status. | |
2548 | */ | |
2549 | spin_unlock(&dev->dev_reservation_lock); | |
2550 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2551 | return 0; |
c66ac9db NB |
2552 | } |
2553 | /* | |
2554 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2555 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2556 | */ | |
2557 | pr_reg->pr_res_scope = scope; | |
2558 | pr_reg->pr_res_type = type; | |
2559 | pr_reg->pr_res_holder = 1; | |
2560 | dev->dev_pr_res_holder = pr_reg; | |
2561 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2562 | PR_REG_ISID_ID_LEN); | |
2563 | ||
6708bb27 | 2564 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2565 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2566 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2567 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2568 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2569 | cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2570 | se_sess->se_node_acl->initiatorname, |
2571 | (prf_isid) ? &i_buf[0] : ""); | |
2572 | spin_unlock(&dev->dev_reservation_lock); | |
2573 | ||
2574 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2575 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2576 | &pr_reg->pr_aptpl_buf[0], |
2577 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2578 | if (!ret) |
2579 | pr_debug("SPC-3 PR: Updated APTPL metadata" | |
c66ac9db NB |
2580 | " for RESERVE\n"); |
2581 | } | |
2582 | ||
2583 | core_scsi3_put_pr_reg(pr_reg); | |
2584 | return 0; | |
2585 | } | |
2586 | ||
2587 | static int core_scsi3_emulate_pro_reserve( | |
2588 | struct se_cmd *cmd, | |
2589 | int type, | |
2590 | int scope, | |
2591 | u64 res_key) | |
2592 | { | |
2593 | struct se_device *dev = cmd->se_dev; | |
2594 | int ret = 0; | |
2595 | ||
2596 | switch (type) { | |
2597 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2598 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2599 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2600 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2601 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2602 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2603 | ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); | |
2604 | break; | |
2605 | default: | |
6708bb27 | 2606 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2607 | " 0x%02x\n", type); |
03e98c9e NB |
2608 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2609 | return -EINVAL; | |
c66ac9db NB |
2610 | } |
2611 | ||
2612 | return ret; | |
2613 | } | |
2614 | ||
2615 | /* | |
2616 | * Called with struct se_device->dev_reservation_lock held. | |
2617 | */ | |
2618 | static void __core_scsi3_complete_pro_release( | |
2619 | struct se_device *dev, | |
2620 | struct se_node_acl *se_nacl, | |
2621 | struct t10_pr_registration *pr_reg, | |
2622 | int explict) | |
2623 | { | |
2624 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; | |
2625 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2626 | int prf_isid; | |
2627 | ||
2628 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2629 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2630 | PR_REG_ISID_ID_LEN); | |
2631 | /* | |
2632 | * Go ahead and release the current PR reservation holder. | |
2633 | */ | |
2634 | dev->dev_pr_res_holder = NULL; | |
2635 | ||
6708bb27 | 2636 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" |
c66ac9db NB |
2637 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2638 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", | |
2639 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
2640 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2641 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db NB |
2642 | tfo->get_fabric_name(), se_nacl->initiatorname, |
2643 | (prf_isid) ? &i_buf[0] : ""); | |
2644 | /* | |
2645 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2646 | */ | |
2647 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2648 | } | |
2649 | ||
2650 | static int core_scsi3_emulate_pro_release( | |
2651 | struct se_cmd *cmd, | |
2652 | int type, | |
2653 | int scope, | |
2654 | u64 res_key) | |
2655 | { | |
2656 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2657 | struct se_session *se_sess = cmd->se_sess; |
2658 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2659 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
e3d6f909 | 2660 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2661 | int ret, all_reg = 0; |
2662 | ||
6708bb27 AG |
2663 | if (!se_sess || !se_lun) { |
2664 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2665 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2666 | return -EINVAL; | |
c66ac9db NB |
2667 | } |
2668 | /* | |
2669 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2670 | */ | |
2671 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2672 | if (!pr_reg) { |
2673 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2674 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
03e98c9e NB |
2675 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2676 | return -EINVAL; | |
c66ac9db NB |
2677 | } |
2678 | /* | |
2679 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2680 | * | |
2681 | * If there is no persistent reservation or in response to a persistent | |
2682 | * reservation release request from a registered I_T nexus that is not a | |
2683 | * persistent reservation holder (see 5.7.10), the device server shall | |
2684 | * do the following: | |
2685 | * | |
2686 | * a) Not release the persistent reservation, if any; | |
2687 | * b) Not remove any registrations; and | |
2688 | * c) Complete the command with GOOD status. | |
2689 | */ | |
2690 | spin_lock(&dev->dev_reservation_lock); | |
2691 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2692 | if (!pr_res_holder) { |
c66ac9db NB |
2693 | /* |
2694 | * No persistent reservation, return GOOD status. | |
2695 | */ | |
2696 | spin_unlock(&dev->dev_reservation_lock); | |
2697 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2698 | return 0; |
c66ac9db NB |
2699 | } |
2700 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2701 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
2702 | all_reg = 1; | |
2703 | ||
2704 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { | |
2705 | /* | |
2706 | * Non 'All Registrants' PR Type cases.. | |
2707 | * Release request from a registered I_T nexus that is not a | |
2708 | * persistent reservation holder. return GOOD status. | |
2709 | */ | |
2710 | spin_unlock(&dev->dev_reservation_lock); | |
2711 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2712 | return 0; |
c66ac9db NB |
2713 | } |
2714 | /* | |
2715 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2716 | * | |
2717 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2718 | * release a persistent reservation. | |
2719 | * | |
2720 | * An application client releases the persistent reservation by issuing | |
2721 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2722 | * an I_T nexus that is a persistent reservation holder with the | |
2723 | * following parameters: | |
2724 | * | |
2725 | * a) RESERVATION KEY field set to the value of the reservation key | |
2726 | * that is registered with the logical unit for the I_T nexus; | |
2727 | */ | |
2728 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2729 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2730 | " does not match existing SA REGISTER res_key:" |
2731 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2732 | spin_unlock(&dev->dev_reservation_lock); | |
2733 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2734 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2735 | return -EINVAL; | |
c66ac9db NB |
2736 | } |
2737 | /* | |
2738 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2739 | * | |
2740 | * b) TYPE field and SCOPE field set to match the persistent | |
2741 | * reservation being released. | |
2742 | */ | |
2743 | if ((pr_res_holder->pr_res_type != type) || | |
2744 | (pr_res_holder->pr_res_scope != scope)) { | |
2745 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2746 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2747 | " reservation from [%s]: %s with different TYPE " |
2748 | "and/or SCOPE while reservation already held by" | |
2749 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2750 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2751 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2752 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2753 | pr_res_holder->pr_reg_nacl->initiatorname); |
2754 | ||
2755 | spin_unlock(&dev->dev_reservation_lock); | |
2756 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2757 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2758 | return -EINVAL; | |
c66ac9db NB |
2759 | } |
2760 | /* | |
2761 | * In response to a persistent reservation release request from the | |
2762 | * persistent reservation holder the device server shall perform a | |
2763 | * release by doing the following as an uninterrupted series of actions: | |
2764 | * a) Release the persistent reservation; | |
2765 | * b) Not remove any registration(s); | |
2766 | * c) If the released persistent reservation is a registrants only type | |
2767 | * or all registrants type persistent reservation, | |
2768 | * the device server shall establish a unit attention condition for | |
2769 | * the initiator port associated with every regis- | |
2770 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2771 | * RESERVE OUT command with RELEASE service action was received, | |
2772 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2773 | * d) If the persistent reservation is of any other type, the device | |
2774 | * server shall not establish a unit attention condition. | |
2775 | */ | |
2776 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
2777 | pr_reg, 1); | |
2778 | ||
2779 | spin_unlock(&dev->dev_reservation_lock); | |
2780 | ||
2781 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2782 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2783 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2784 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2785 | /* | |
2786 | * If no UNIT ATTENTION conditions will be established for | |
2787 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2788 | * go ahead and check for APTPL=1 update+write below | |
2789 | */ | |
2790 | goto write_aptpl; | |
2791 | } | |
2792 | ||
2793 | spin_lock(&pr_tmpl->registration_lock); | |
2794 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2795 | pr_reg_list) { | |
2796 | /* | |
2797 | * Do not establish a UNIT ATTENTION condition | |
2798 | * for the calling I_T Nexus | |
2799 | */ | |
2800 | if (pr_reg_p == pr_reg) | |
2801 | continue; | |
2802 | ||
2803 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2804 | pr_reg_p->pr_res_mapped_lun, | |
2805 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2806 | } | |
2807 | spin_unlock(&pr_tmpl->registration_lock); | |
2808 | ||
2809 | write_aptpl: | |
2810 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2811 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2812 | &pr_reg->pr_aptpl_buf[0], |
2813 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2814 | if (!ret) |
2815 | pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); | |
c66ac9db NB |
2816 | } |
2817 | ||
2818 | core_scsi3_put_pr_reg(pr_reg); | |
2819 | return 0; | |
2820 | } | |
2821 | ||
2822 | static int core_scsi3_emulate_pro_clear( | |
2823 | struct se_cmd *cmd, | |
2824 | u64 res_key) | |
2825 | { | |
2826 | struct se_device *dev = cmd->se_dev; | |
2827 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 AG |
2828 | struct se_session *se_sess = cmd->se_sess; |
2829 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; | |
c66ac9db NB |
2830 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2831 | u32 pr_res_mapped_lun = 0; | |
2832 | int calling_it_nexus = 0; | |
2833 | /* | |
2834 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2835 | */ | |
5951146d | 2836 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2837 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2838 | if (!pr_reg_n) { |
2839 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2840 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
03e98c9e NB |
2841 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2842 | return -EINVAL; | |
c66ac9db NB |
2843 | } |
2844 | /* | |
2845 | * From spc4r17 section 5.7.11.6, Clearing: | |
2846 | * | |
2847 | * Any application client may release the persistent reservation and | |
2848 | * remove all registrations from a device server by issuing a | |
2849 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2850 | * registered I_T nexus with the following parameter: | |
2851 | * | |
2852 | * a) RESERVATION KEY field set to the value of the reservation key | |
2853 | * that is registered with the logical unit for the I_T nexus. | |
2854 | */ | |
2855 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2856 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2857 | " res_key: 0x%016Lx does not match" |
2858 | " existing SA REGISTER res_key:" | |
2859 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2860 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
2861 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2862 | return -EINVAL; | |
c66ac9db NB |
2863 | } |
2864 | /* | |
2865 | * a) Release the persistent reservation, if any; | |
2866 | */ | |
2867 | spin_lock(&dev->dev_reservation_lock); | |
2868 | pr_res_holder = dev->dev_pr_res_holder; | |
2869 | if (pr_res_holder) { | |
2870 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2871 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
2872 | pr_res_holder, 0); | |
2873 | } | |
2874 | spin_unlock(&dev->dev_reservation_lock); | |
2875 | /* | |
2876 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2877 | */ | |
2878 | spin_lock(&pr_tmpl->registration_lock); | |
2879 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2880 | &pr_tmpl->registration_list, pr_reg_list) { | |
2881 | ||
2882 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2883 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2884 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2885 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2886 | calling_it_nexus); | |
2887 | /* | |
2888 | * e) Establish a unit attention condition for the initiator | |
2889 | * port associated with every registered I_T nexus other | |
2890 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2891 | * command with CLEAR service action was received, with the | |
2892 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2893 | */ | |
6708bb27 | 2894 | if (!calling_it_nexus) |
c66ac9db NB |
2895 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2896 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2897 | } | |
2898 | spin_unlock(&pr_tmpl->registration_lock); | |
2899 | ||
6708bb27 | 2900 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2901 | cmd->se_tfo->get_fabric_name()); |
c66ac9db NB |
2902 | |
2903 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2904 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2905 | pr_debug("SPC-3 PR: Updated APTPL metadata" |
c66ac9db NB |
2906 | " for CLEAR\n"); |
2907 | } | |
2908 | ||
2909 | core_scsi3_pr_generation(dev); | |
2910 | return 0; | |
2911 | } | |
2912 | ||
2913 | /* | |
2914 | * Called with struct se_device->dev_reservation_lock held. | |
2915 | */ | |
2916 | static void __core_scsi3_complete_pro_preempt( | |
2917 | struct se_device *dev, | |
2918 | struct t10_pr_registration *pr_reg, | |
2919 | struct list_head *preempt_and_abort_list, | |
2920 | int type, | |
2921 | int scope, | |
2922 | int abort) | |
2923 | { | |
2924 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
2925 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
2926 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2927 | int prf_isid; | |
2928 | ||
2929 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2930 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2931 | PR_REG_ISID_ID_LEN); | |
2932 | /* | |
2933 | * Do an implict RELEASE of the existing reservation. | |
2934 | */ | |
2935 | if (dev->dev_pr_res_holder) | |
2936 | __core_scsi3_complete_pro_release(dev, nacl, | |
2937 | dev->dev_pr_res_holder, 0); | |
2938 | ||
2939 | dev->dev_pr_res_holder = pr_reg; | |
2940 | pr_reg->pr_res_holder = 1; | |
2941 | pr_reg->pr_res_type = type; | |
2942 | pr_reg->pr_res_scope = scope; | |
2943 | ||
6708bb27 | 2944 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db NB |
2945 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2946 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2947 | core_scsi3_pr_dump_type(type), | |
2948 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2949 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
c66ac9db NB |
2950 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", |
2951 | nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); | |
2952 | /* | |
2953 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2954 | * struct t10_pr_registration to the list that will be compared | |
2955 | * against received CDBs.. | |
2956 | */ | |
2957 | if (preempt_and_abort_list) | |
2958 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2959 | preempt_and_abort_list); | |
2960 | } | |
2961 | ||
2962 | static void core_scsi3_release_preempt_and_abort( | |
2963 | struct list_head *preempt_and_abort_list, | |
2964 | struct t10_pr_registration *pr_reg_holder) | |
2965 | { | |
2966 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2967 | ||
2968 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2969 | pr_reg_abort_list) { | |
2970 | ||
2971 | list_del(&pr_reg->pr_reg_abort_list); | |
2972 | if (pr_reg_holder == pr_reg) | |
2973 | continue; | |
2974 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2975 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2976 | continue; |
2977 | } | |
2978 | ||
2979 | pr_reg->pr_reg_deve = NULL; | |
2980 | pr_reg->pr_reg_nacl = NULL; | |
2981 | kfree(pr_reg->pr_aptpl_buf); | |
2982 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
2983 | } | |
2984 | } | |
2985 | ||
c66ac9db NB |
2986 | static int core_scsi3_pro_preempt( |
2987 | struct se_cmd *cmd, | |
2988 | int type, | |
2989 | int scope, | |
2990 | u64 res_key, | |
2991 | u64 sa_res_key, | |
2992 | int abort) | |
2993 | { | |
5951146d | 2994 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2995 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2996 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2997 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2998 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
e3d6f909 | 2999 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
3000 | u32 pr_res_mapped_lun = 0; |
3001 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; | |
3002 | int prh_type = 0, prh_scope = 0, ret; | |
3003 | ||
03e98c9e NB |
3004 | if (!se_sess) { |
3005 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3006 | return -EINVAL; | |
3007 | } | |
c66ac9db | 3008 | |
5951146d | 3009 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3010 | se_sess); |
6708bb27 AG |
3011 | if (!pr_reg_n) { |
3012 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db NB |
3013 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
3014 | (abort) ? "_AND_ABORT" : ""); | |
03e98c9e NB |
3015 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3016 | return -EINVAL; | |
c66ac9db NB |
3017 | } |
3018 | if (pr_reg_n->pr_res_key != res_key) { | |
3019 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3020 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3021 | return -EINVAL; | |
c66ac9db NB |
3022 | } |
3023 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 3024 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 3025 | core_scsi3_put_pr_reg(pr_reg_n); |
03e98c9e NB |
3026 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3027 | return -EINVAL; | |
c66ac9db | 3028 | } |
c66ac9db NB |
3029 | |
3030 | spin_lock(&dev->dev_reservation_lock); | |
3031 | pr_res_holder = dev->dev_pr_res_holder; | |
3032 | if (pr_res_holder && | |
3033 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3034 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
3035 | all_reg = 1; | |
3036 | ||
6708bb27 | 3037 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
3038 | spin_unlock(&dev->dev_reservation_lock); |
3039 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3040 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3041 | return -EINVAL; | |
c66ac9db NB |
3042 | } |
3043 | /* | |
3044 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
3045 | * | |
3046 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
3047 | * persistent reservation holder or there is no persistent reservation | |
3048 | * holder (i.e., there is no persistent reservation), then the device | |
3049 | * server shall perform a preempt by doing the following in an | |
3050 | * uninterrupted series of actions. (See below..) | |
3051 | */ | |
6708bb27 | 3052 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
3053 | /* |
3054 | * No existing or SA Reservation Key matching reservations.. | |
3055 | * | |
3056 | * PROUT SA PREEMPT with All Registrant type reservations are | |
3057 | * allowed to be processed without a matching SA Reservation Key | |
3058 | */ | |
3059 | spin_lock(&pr_tmpl->registration_lock); | |
3060 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3061 | &pr_tmpl->registration_list, pr_reg_list) { | |
3062 | /* | |
3063 | * Removing of registrations in non all registrants | |
3064 | * type reservations without a matching SA reservation | |
3065 | * key. | |
3066 | * | |
3067 | * a) Remove the registrations for all I_T nexuses | |
3068 | * specified by the SERVICE ACTION RESERVATION KEY | |
3069 | * field; | |
3070 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
3071 | * c) Process tasks as defined in 5.7.1; and | |
3072 | * d) Establish a unit attention condition for the | |
3073 | * initiator port associated with every I_T nexus | |
3074 | * that lost its registration other than the I_T | |
3075 | * nexus on which the PERSISTENT RESERVE OUT command | |
3076 | * was received, with the additional sense code set | |
3077 | * to REGISTRATIONS PREEMPTED. | |
3078 | */ | |
6708bb27 | 3079 | if (!all_reg) { |
c66ac9db NB |
3080 | if (pr_reg->pr_res_key != sa_res_key) |
3081 | continue; | |
3082 | ||
3083 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3084 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3085 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3086 | __core_scsi3_free_registration(dev, pr_reg, | |
3087 | (abort) ? &preempt_and_abort_list : | |
3088 | NULL, calling_it_nexus); | |
3089 | released_regs++; | |
3090 | } else { | |
3091 | /* | |
3092 | * Case for any existing all registrants type | |
3093 | * reservation, follow logic in spc4r17 section | |
3094 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
3095 | * | |
3096 | * For a ZERO SA Reservation key, release | |
3097 | * all other registrations and do an implict | |
3098 | * release of active persistent reservation. | |
3099 | * | |
3100 | * For a non-ZERO SA Reservation key, only | |
3101 | * release the matching reservation key from | |
3102 | * registrations. | |
3103 | */ | |
3104 | if ((sa_res_key) && | |
3105 | (pr_reg->pr_res_key != sa_res_key)) | |
3106 | continue; | |
3107 | ||
3108 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3109 | if (calling_it_nexus) | |
3110 | continue; | |
3111 | ||
3112 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3113 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3114 | __core_scsi3_free_registration(dev, pr_reg, | |
3115 | (abort) ? &preempt_and_abort_list : | |
3116 | NULL, 0); | |
3117 | released_regs++; | |
3118 | } | |
6708bb27 | 3119 | if (!calling_it_nexus) |
c66ac9db NB |
3120 | core_scsi3_ua_allocate(pr_reg_nacl, |
3121 | pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3122 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3123 | } |
3124 | spin_unlock(&pr_tmpl->registration_lock); | |
3125 | /* | |
3126 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
3127 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
3128 | * RESERVATION KEY field to a value that does not match any | |
3129 | * registered reservation key, then the device server shall | |
3130 | * complete the command with RESERVATION CONFLICT status. | |
3131 | */ | |
6708bb27 | 3132 | if (!released_regs) { |
c66ac9db NB |
3133 | spin_unlock(&dev->dev_reservation_lock); |
3134 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3135 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3136 | return -EINVAL; | |
c66ac9db NB |
3137 | } |
3138 | /* | |
3139 | * For an existing all registrants type reservation | |
3140 | * with a zero SA rservation key, preempt the existing | |
3141 | * reservation with the new PR type and scope. | |
3142 | */ | |
3143 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
3144 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3145 | (abort) ? &preempt_and_abort_list : NULL, | |
3146 | type, scope, abort); | |
3147 | ||
3148 | if (abort) | |
3149 | core_scsi3_release_preempt_and_abort( | |
3150 | &preempt_and_abort_list, pr_reg_n); | |
3151 | } | |
3152 | spin_unlock(&dev->dev_reservation_lock); | |
3153 | ||
3154 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3155 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3156 | &pr_reg_n->pr_aptpl_buf[0], |
3157 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3158 | if (!ret) |
3159 | pr_debug("SPC-3 PR: Updated APTPL" | |
c66ac9db NB |
3160 | " metadata for PREEMPT%s\n", (abort) ? |
3161 | "_AND_ABORT" : ""); | |
3162 | } | |
3163 | ||
3164 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3165 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3166 | return 0; |
3167 | } | |
3168 | /* | |
3169 | * The PREEMPTing SA reservation key matches that of the | |
3170 | * existing persistent reservation, first, we check if | |
3171 | * we are preempting our own reservation. | |
3172 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3173 | * persistent reservations and registration handling | |
3174 | * | |
3175 | * If an all registrants persistent reservation is not | |
3176 | * present, it is not an error for the persistent | |
3177 | * reservation holder to preempt itself (i.e., a | |
3178 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3179 | * or a PREEMPT AND ABORT service action with the | |
3180 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3181 | * persistent reservation holder's reservation key that | |
3182 | * is received from the persistent reservation holder). | |
3183 | * In that case, the device server shall establish the | |
3184 | * new persistent reservation and maintain the | |
3185 | * registration. | |
3186 | */ | |
3187 | prh_type = pr_res_holder->pr_res_type; | |
3188 | prh_scope = pr_res_holder->pr_res_scope; | |
3189 | /* | |
3190 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3191 | * persistent reservation holder (see 5.7.10), the device | |
3192 | * server shall perform a preempt by doing the following as | |
3193 | * an uninterrupted series of actions: | |
3194 | * | |
3195 | * a) Release the persistent reservation for the holder | |
3196 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3197 | */ | |
3198 | if (pr_reg_n != pr_res_holder) | |
3199 | __core_scsi3_complete_pro_release(dev, | |
3200 | pr_res_holder->pr_reg_nacl, | |
3201 | dev->dev_pr_res_holder, 0); | |
3202 | /* | |
3203 | * b) Remove the registrations for all I_T nexuses identified | |
3204 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3205 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3206 | * OUT command. If an all registrants persistent reservation | |
3207 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3208 | * is set to zero, then all registrations shall be removed | |
3209 | * except for that of the I_T nexus that is being used for | |
3210 | * the PERSISTENT RESERVE OUT command; | |
3211 | */ | |
3212 | spin_lock(&pr_tmpl->registration_lock); | |
3213 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3214 | &pr_tmpl->registration_list, pr_reg_list) { | |
3215 | ||
3216 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3217 | if (calling_it_nexus) | |
3218 | continue; | |
3219 | ||
3220 | if (pr_reg->pr_res_key != sa_res_key) | |
3221 | continue; | |
3222 | ||
3223 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3224 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3225 | __core_scsi3_free_registration(dev, pr_reg, | |
3226 | (abort) ? &preempt_and_abort_list : NULL, | |
3227 | calling_it_nexus); | |
3228 | /* | |
3229 | * e) Establish a unit attention condition for the initiator | |
3230 | * port associated with every I_T nexus that lost its | |
3231 | * persistent reservation and/or registration, with the | |
3232 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3233 | */ | |
3234 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3235 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3236 | } |
3237 | spin_unlock(&pr_tmpl->registration_lock); | |
3238 | /* | |
3239 | * c) Establish a persistent reservation for the preempting | |
3240 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3241 | */ | |
3242 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3243 | (abort) ? &preempt_and_abort_list : NULL, | |
3244 | type, scope, abort); | |
3245 | /* | |
3246 | * d) Process tasks as defined in 5.7.1; | |
3247 | * e) See above.. | |
3248 | * f) If the type or scope has changed, then for every I_T nexus | |
3249 | * whose reservation key was not removed, except for the I_T | |
3250 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3251 | * received, the device server shall establish a unit | |
3252 | * attention condition for the initiator port associated with | |
3253 | * that I_T nexus, with the additional sense code set to | |
3254 | * RESERVATIONS RELEASED. If the type or scope have not | |
3255 | * changed, then no unit attention condition(s) shall be | |
3256 | * established for this reason. | |
3257 | */ | |
3258 | if ((prh_type != type) || (prh_scope != scope)) { | |
3259 | spin_lock(&pr_tmpl->registration_lock); | |
3260 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3261 | &pr_tmpl->registration_list, pr_reg_list) { | |
3262 | ||
3263 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3264 | if (calling_it_nexus) | |
3265 | continue; | |
3266 | ||
3267 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3268 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3269 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3270 | } | |
3271 | spin_unlock(&pr_tmpl->registration_lock); | |
3272 | } | |
3273 | spin_unlock(&dev->dev_reservation_lock); | |
3274 | /* | |
3275 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3276 | * All received CDBs for the matching existing reservation and | |
3277 | * registrations undergo ABORT_TASK logic. | |
3278 | * | |
3279 | * From there, core_scsi3_release_preempt_and_abort() will | |
3280 | * release every registration in the list (which have already | |
3281 | * been removed from the primary pr_reg list), except the | |
3282 | * new persistent reservation holder, the calling Initiator Port. | |
3283 | */ | |
3284 | if (abort) { | |
3285 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); | |
3286 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3287 | pr_reg_n); | |
3288 | } | |
3289 | ||
3290 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3291 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3292 | &pr_reg_n->pr_aptpl_buf[0], |
3293 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3294 | if (!ret) |
3295 | pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" | |
c66ac9db NB |
3296 | "%s\n", (abort) ? "_AND_ABORT" : ""); |
3297 | } | |
3298 | ||
3299 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3300 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3301 | return 0; |
3302 | } | |
3303 | ||
3304 | static int core_scsi3_emulate_pro_preempt( | |
3305 | struct se_cmd *cmd, | |
3306 | int type, | |
3307 | int scope, | |
3308 | u64 res_key, | |
3309 | u64 sa_res_key, | |
3310 | int abort) | |
3311 | { | |
3312 | int ret = 0; | |
3313 | ||
3314 | switch (type) { | |
3315 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3316 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3317 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3318 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3319 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3320 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
3321 | ret = core_scsi3_pro_preempt(cmd, type, scope, | |
3322 | res_key, sa_res_key, abort); | |
3323 | break; | |
3324 | default: | |
6708bb27 | 3325 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
c66ac9db | 3326 | " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); |
03e98c9e NB |
3327 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3328 | return -EINVAL; | |
c66ac9db NB |
3329 | } |
3330 | ||
3331 | return ret; | |
3332 | } | |
3333 | ||
3334 | ||
3335 | static int core_scsi3_emulate_pro_register_and_move( | |
3336 | struct se_cmd *cmd, | |
3337 | u64 res_key, | |
3338 | u64 sa_res_key, | |
3339 | int aptpl, | |
3340 | int unreg) | |
3341 | { | |
e3d6f909 | 3342 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3343 | struct se_device *dev = cmd->se_dev; |
28168905 | 3344 | struct se_dev_entry *dest_se_deve = NULL; |
e3d6f909 | 3345 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3346 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3347 | struct se_port *se_port; | |
3348 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
3349 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; | |
3350 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; | |
e3d6f909 | 3351 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 3352 | unsigned char *buf; |
c66ac9db NB |
3353 | unsigned char *initiator_str; |
3354 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
3355 | u32 tid_len, tmp_tid_len; | |
3356 | int new_reg = 0, type, scope, ret, matching_iname, prf_isid; | |
3357 | unsigned short rtpi; | |
3358 | unsigned char proto_ident; | |
3359 | ||
6708bb27 AG |
3360 | if (!se_sess || !se_lun) { |
3361 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
3362 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3363 | return -EINVAL; | |
c66ac9db NB |
3364 | } |
3365 | memset(dest_iport, 0, 64); | |
3366 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
3367 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3368 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3369 | /* |
3370 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3371 | * Register behaviors for a REGISTER AND MOVE service action | |
3372 | * | |
3373 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3374 | */ | |
5951146d | 3375 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3376 | se_sess); |
6708bb27 AG |
3377 | if (!pr_reg) { |
3378 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3379 | " *pr_reg for REGISTER_AND_MOVE\n"); |
03e98c9e NB |
3380 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3381 | return -EINVAL; | |
c66ac9db NB |
3382 | } |
3383 | /* | |
3384 | * The provided reservation key much match the existing reservation key | |
3385 | * provided during this initiator's I_T nexus registration. | |
3386 | */ | |
3387 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3388 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3389 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3390 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
3391 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3392 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3393 | return -EINVAL; | |
c66ac9db NB |
3394 | } |
3395 | /* | |
3396 | * The service active reservation key needs to be non zero | |
3397 | */ | |
6708bb27 AG |
3398 | if (!sa_res_key) { |
3399 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db NB |
3400 | " sa_res_key\n"); |
3401 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3402 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3403 | return -EINVAL; | |
c66ac9db | 3404 | } |
05d1c7c0 | 3405 | |
c66ac9db NB |
3406 | /* |
3407 | * Determine the Relative Target Port Identifier where the reservation | |
3408 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3409 | * information. | |
3410 | */ | |
4949314c | 3411 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
3412 | rtpi = (buf[18] & 0xff) << 8; |
3413 | rtpi |= buf[19] & 0xff; | |
3414 | tid_len = (buf[20] & 0xff) << 24; | |
3415 | tid_len |= (buf[21] & 0xff) << 16; | |
3416 | tid_len |= (buf[22] & 0xff) << 8; | |
3417 | tid_len |= buf[23] & 0xff; | |
4949314c | 3418 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3419 | buf = NULL; |
c66ac9db NB |
3420 | |
3421 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3422 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3423 | " does not equal CDB data_length: %u\n", tid_len, |
3424 | cmd->data_length); | |
3425 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3426 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3427 | return -EINVAL; | |
c66ac9db NB |
3428 | } |
3429 | ||
3430 | spin_lock(&dev->se_port_lock); | |
3431 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3432 | if (se_port->sep_rtpi != rtpi) | |
3433 | continue; | |
3434 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3435 | if (!dest_se_tpg) |
c66ac9db | 3436 | continue; |
e3d6f909 | 3437 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3438 | if (!dest_tf_ops) |
c66ac9db NB |
3439 | continue; |
3440 | ||
3441 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); | |
3442 | smp_mb__after_atomic_inc(); | |
3443 | spin_unlock(&dev->se_port_lock); | |
3444 | ||
3445 | ret = core_scsi3_tpg_depend_item(dest_se_tpg); | |
3446 | if (ret != 0) { | |
6708bb27 | 3447 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db NB |
3448 | " for dest_se_tpg\n"); |
3449 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); | |
3450 | smp_mb__after_atomic_dec(); | |
3451 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3452 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3453 | return -EINVAL; | |
c66ac9db NB |
3454 | } |
3455 | ||
3456 | spin_lock(&dev->se_port_lock); | |
3457 | break; | |
3458 | } | |
3459 | spin_unlock(&dev->se_port_lock); | |
3460 | ||
6708bb27 AG |
3461 | if (!dest_se_tpg || !dest_tf_ops) { |
3462 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3463 | " fabric ops from Relative Target Port Identifier:" |
3464 | " %hu\n", rtpi); | |
3465 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3466 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3467 | return -EINVAL; | |
c66ac9db | 3468 | } |
05d1c7c0 | 3469 | |
4949314c | 3470 | buf = transport_kmap_data_sg(cmd); |
c66ac9db | 3471 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3472 | |
6708bb27 | 3473 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3474 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3475 | |
c66ac9db | 3476 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { |
6708bb27 | 3477 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3478 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3479 | " from fabric: %s\n", proto_ident, | |
3480 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), | |
3481 | dest_tf_ops->get_fabric_name()); | |
03e98c9e NB |
3482 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3483 | ret = -EINVAL; | |
c66ac9db NB |
3484 | goto out; |
3485 | } | |
3486 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { | |
6708bb27 | 3487 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" |
c66ac9db NB |
3488 | " containg a valid tpg_parse_pr_out_transport_id" |
3489 | " function pointer\n"); | |
03e98c9e NB |
3490 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3491 | ret = -EINVAL; | |
c66ac9db NB |
3492 | goto out; |
3493 | } | |
3494 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, | |
3495 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); | |
6708bb27 AG |
3496 | if (!initiator_str) { |
3497 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3498 | " initiator_str from Transport ID\n"); |
03e98c9e NB |
3499 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3500 | ret = -EINVAL; | |
c66ac9db NB |
3501 | goto out; |
3502 | } | |
3503 | ||
4949314c | 3504 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3505 | buf = NULL; |
3506 | ||
6708bb27 | 3507 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3508 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3509 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3510 | iport_ptr : ""); | |
3511 | /* | |
3512 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3513 | * action specifies a TransportID that is the same as the initiator port | |
3514 | * of the I_T nexus for the command received, then the command shall | |
3515 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3516 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3517 | * IN PARAMETER LIST. | |
3518 | */ | |
3519 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3520 | matching_iname = (!strcmp(initiator_str, | |
3521 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3522 | if (!matching_iname) |
c66ac9db NB |
3523 | goto after_iport_check; |
3524 | ||
6708bb27 AG |
3525 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3526 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3527 | " matches: %s on received I_T Nexus\n", initiator_str, |
3528 | pr_reg_nacl->initiatorname); | |
03e98c9e NB |
3529 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3530 | ret = -EINVAL; | |
c66ac9db NB |
3531 | goto out; |
3532 | } | |
6708bb27 AG |
3533 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3534 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3535 | " matches: %s %s on received I_T Nexus\n", |
3536 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3537 | pr_reg->pr_reg_isid); | |
03e98c9e NB |
3538 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3539 | ret = -EINVAL; | |
c66ac9db NB |
3540 | goto out; |
3541 | } | |
3542 | after_iport_check: | |
3543 | /* | |
3544 | * Locate the destination struct se_node_acl from the received Transport ID | |
3545 | */ | |
28638887 | 3546 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db NB |
3547 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3548 | initiator_str); | |
3549 | if (dest_node_acl) { | |
3550 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
3551 | smp_mb__after_atomic_inc(); | |
3552 | } | |
28638887 | 3553 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db | 3554 | |
6708bb27 AG |
3555 | if (!dest_node_acl) { |
3556 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3557 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3558 | initiator_str); | |
03e98c9e NB |
3559 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3560 | ret = -EINVAL; | |
c66ac9db NB |
3561 | goto out; |
3562 | } | |
3563 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
3564 | if (ret != 0) { | |
6708bb27 | 3565 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db NB |
3566 | " dest_node_acl\n"); |
3567 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
3568 | smp_mb__after_atomic_dec(); | |
3569 | dest_node_acl = NULL; | |
03e98c9e NB |
3570 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3571 | ret = -EINVAL; | |
c66ac9db NB |
3572 | goto out; |
3573 | } | |
8b1e1244 | 3574 | |
6708bb27 | 3575 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3576 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3577 | dest_node_acl->initiatorname); | |
8b1e1244 | 3578 | |
c66ac9db NB |
3579 | /* |
3580 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3581 | * PORT IDENTIFIER. | |
3582 | */ | |
3583 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3584 | if (!dest_se_deve) { |
3585 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3586 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
03e98c9e NB |
3587 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3588 | ret = -EINVAL; | |
c66ac9db NB |
3589 | goto out; |
3590 | } | |
3591 | ||
3592 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
3593 | if (ret < 0) { | |
6708bb27 | 3594 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
c66ac9db NB |
3595 | atomic_dec(&dest_se_deve->pr_ref_count); |
3596 | smp_mb__after_atomic_dec(); | |
3597 | dest_se_deve = NULL; | |
03e98c9e NB |
3598 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3599 | ret = -EINVAL; | |
c66ac9db NB |
3600 | goto out; |
3601 | } | |
8b1e1244 | 3602 | |
6708bb27 | 3603 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3604 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3605 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3606 | dest_se_deve->mapped_lun); | |
8b1e1244 | 3607 | |
c66ac9db NB |
3608 | /* |
3609 | * A persistent reservation needs to already existing in order to | |
3610 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3611 | */ | |
3612 | spin_lock(&dev->dev_reservation_lock); | |
3613 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3614 | if (!pr_res_holder) { |
3615 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3616 | " currently held\n"); |
3617 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3618 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3619 | ret = -EINVAL; | |
c66ac9db NB |
3620 | goto out; |
3621 | } | |
3622 | /* | |
3623 | * The received on I_T Nexus must be the reservation holder. | |
3624 | * | |
3625 | * From spc4r17 section 5.7.8 Table 50 -- | |
3626 | * Register behaviors for a REGISTER AND MOVE service action | |
3627 | */ | |
3628 | if (pr_res_holder != pr_reg) { | |
6708bb27 | 3629 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3630 | " Nexus is not reservation holder\n"); |
3631 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3632 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3633 | ret = -EINVAL; | |
c66ac9db NB |
3634 | goto out; |
3635 | } | |
3636 | /* | |
3637 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3638 | * | |
3639 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3640 | * action is received and the established persistent reservation is a | |
3641 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3642 | * All Registrants type reservation, then the command shall be completed | |
3643 | * with RESERVATION CONFLICT status. | |
3644 | */ | |
3645 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3646 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3647 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3648 | " reservation for type: %s\n", |
3649 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3650 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3651 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3652 | ret = -EINVAL; | |
c66ac9db NB |
3653 | goto out; |
3654 | } | |
3655 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3656 | /* | |
3657 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3658 | */ | |
3659 | type = pr_res_holder->pr_res_type; | |
3660 | scope = pr_res_holder->pr_res_type; | |
3661 | /* | |
3662 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3663 | * RESERVATION KEY field with the I_T nexus specified as the | |
3664 | * destination of the register and move, where: | |
3665 | * A) The I_T nexus is specified by the TransportID and the | |
3666 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3667 | * B) Regardless of the TransportID format used, the association for | |
3668 | * the initiator port is based on either the initiator port name | |
3669 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3670 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3671 | * transport protocols where port names are not required; | |
3672 | * d) Register the reservation key specified in the SERVICE ACTION | |
3673 | * RESERVATION KEY field; | |
3674 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3675 | * RESERVATION KEY field and associated information; | |
3676 | * | |
3677 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3678 | * register an I_T nexus that is already registered with the same | |
3679 | * reservation key or a different reservation key. | |
3680 | */ | |
3681 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3682 | iport_ptr); | |
6708bb27 | 3683 | if (!dest_pr_reg) { |
5951146d | 3684 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
3685 | dest_node_acl, dest_se_deve, iport_ptr, |
3686 | sa_res_key, 0, aptpl, 2, 1); | |
3687 | if (ret != 0) { | |
3688 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3689 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3690 | ret = -EINVAL; | |
c66ac9db NB |
3691 | goto out; |
3692 | } | |
3693 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3694 | iport_ptr); | |
3695 | new_reg = 1; | |
3696 | } | |
3697 | /* | |
3698 | * f) Release the persistent reservation for the persistent reservation | |
3699 | * holder (i.e., the I_T nexus on which the | |
3700 | */ | |
3701 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
3702 | dev->dev_pr_res_holder, 0); | |
3703 | /* | |
3704 | * g) Move the persistent reservation to the specified I_T nexus using | |
3705 | * the same scope and type as the persistent reservation released in | |
3706 | * item f); and | |
3707 | */ | |
3708 | dev->dev_pr_res_holder = dest_pr_reg; | |
3709 | dest_pr_reg->pr_res_holder = 1; | |
3710 | dest_pr_reg->pr_res_type = type; | |
3711 | pr_reg->pr_res_scope = scope; | |
3712 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
3713 | PR_REG_ISID_ID_LEN); | |
3714 | /* | |
3715 | * Increment PRGeneration for existing registrations.. | |
3716 | */ | |
6708bb27 | 3717 | if (!new_reg) |
c66ac9db NB |
3718 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3719 | spin_unlock(&dev->dev_reservation_lock); | |
3720 | ||
6708bb27 | 3721 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3722 | " created new reservation holder TYPE: %s on object RTPI:" |
3723 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3724 | core_scsi3_pr_dump_type(type), rtpi, | |
3725 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3726 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3727 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3728 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
3729 | (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), | |
3730 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? | |
3731 | iport_ptr : ""); | |
3732 | /* | |
3733 | * It is now safe to release configfs group dependencies for destination | |
3734 | * of Transport ID Initiator Device/Port Identifier | |
3735 | */ | |
3736 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3737 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3738 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3739 | /* | |
3740 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3741 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3742 | */ | |
3743 | if (unreg) { | |
3744 | spin_lock(&pr_tmpl->registration_lock); | |
3745 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3746 | spin_unlock(&pr_tmpl->registration_lock); | |
3747 | } else | |
3748 | core_scsi3_put_pr_reg(pr_reg); | |
3749 | ||
3750 | /* | |
3751 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
3752 | * write out the updated metadata to struct file for this SCSI device. | |
3753 | */ | |
6708bb27 | 3754 | if (!aptpl) { |
c66ac9db | 3755 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 3756 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 3757 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
3758 | " REGISTER_AND_MOVE\n"); |
3759 | } else { | |
3760 | pr_tmpl->pr_aptpl_active = 1; | |
5951146d | 3761 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3762 | &dest_pr_reg->pr_aptpl_buf[0], |
3763 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3764 | if (!ret) |
3765 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for" | |
c66ac9db NB |
3766 | " REGISTER_AND_MOVE\n"); |
3767 | } | |
3768 | ||
4949314c | 3769 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3770 | |
c66ac9db NB |
3771 | core_scsi3_put_pr_reg(dest_pr_reg); |
3772 | return 0; | |
3773 | out: | |
05d1c7c0 | 3774 | if (buf) |
4949314c | 3775 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3776 | if (dest_se_deve) |
3777 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3778 | if (dest_node_acl) | |
3779 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3780 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3781 | core_scsi3_put_pr_reg(pr_reg); | |
3782 | return ret; | |
3783 | } | |
3784 | ||
3785 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3786 | { | |
3787 | unsigned int __v1, __v2; | |
3788 | ||
3789 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3790 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3791 | ||
3792 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3793 | } | |
3794 | ||
3795 | /* | |
3796 | * See spc4r17 section 6.14 Table 170 | |
3797 | */ | |
6bb35e00 | 3798 | int target_scsi3_emulate_pr_out(struct se_cmd *cmd) |
c66ac9db | 3799 | { |
617c0e06 | 3800 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3801 | unsigned char *buf; |
c66ac9db NB |
3802 | u64 res_key, sa_res_key; |
3803 | int sa, scope, type, aptpl; | |
3804 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
d29a5b6a | 3805 | int ret; |
617c0e06 CH |
3806 | |
3807 | /* | |
3808 | * Following spc2r20 5.5.1 Reservations overview: | |
3809 | * | |
3810 | * If a logical unit has been reserved by any RESERVE command and is | |
3811 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3812 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3813 | * initiator or service action and shall terminate with a RESERVATION | |
3814 | * CONFLICT status. | |
3815 | */ | |
3816 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { | |
3817 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" | |
3818 | " SPC-2 reservation is held, returning" | |
3819 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
3820 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3821 | ret = EINVAL; | |
d29a5b6a | 3822 | goto out; |
617c0e06 CH |
3823 | } |
3824 | ||
c66ac9db NB |
3825 | /* |
3826 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3827 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3828 | */ | |
03e98c9e NB |
3829 | if (!cmd->se_sess) { |
3830 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3831 | return -EINVAL; | |
3832 | } | |
c66ac9db NB |
3833 | |
3834 | if (cmd->data_length < 24) { | |
6708bb27 | 3835 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3836 | " length too small: %u\n", cmd->data_length); |
03e98c9e NB |
3837 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3838 | ret = -EINVAL; | |
d29a5b6a | 3839 | goto out; |
c66ac9db NB |
3840 | } |
3841 | /* | |
3842 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3843 | */ | |
3844 | sa = (cdb[1] & 0x1f); | |
3845 | scope = (cdb[2] & 0xf0); | |
3846 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3847 | |
4949314c | 3848 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
3849 | /* |
3850 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3851 | */ | |
3852 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3853 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3854 | /* | |
3855 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3856 | * SCSI TransportIDs. | |
3857 | */ | |
3858 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3859 | spec_i_pt = (buf[20] & 0x08); | |
3860 | all_tg_pt = (buf[20] & 0x04); | |
3861 | aptpl = (buf[20] & 0x01); | |
3862 | } else { | |
3863 | aptpl = (buf[17] & 0x01); | |
3864 | unreg = (buf[17] & 0x02); | |
3865 | } | |
4949314c | 3866 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3867 | buf = NULL; |
3868 | ||
c66ac9db NB |
3869 | /* |
3870 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3871 | */ | |
d29a5b6a | 3872 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) { |
03e98c9e NB |
3873 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3874 | ret = -EINVAL; | |
d29a5b6a CH |
3875 | goto out; |
3876 | } | |
3877 | ||
c66ac9db NB |
3878 | /* |
3879 | * From spc4r17 section 6.14: | |
3880 | * | |
3881 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3882 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3883 | * the command shall be terminated with CHECK CONDITION status, with | |
3884 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3885 | * code set to PARAMETER LIST LENGTH ERROR. | |
3886 | */ | |
6708bb27 | 3887 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3888 | (cmd->data_length != 24)) { |
6708bb27 | 3889 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3890 | " list length: %u\n", cmd->data_length); |
03e98c9e NB |
3891 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3892 | ret = -EINVAL; | |
d29a5b6a | 3893 | goto out; |
c66ac9db NB |
3894 | } |
3895 | /* | |
3896 | * (core_scsi3_emulate_pro_* function parameters | |
3897 | * are defined by spc4r17 Table 174: | |
3898 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3899 | */ | |
3900 | switch (sa) { | |
3901 | case PRO_REGISTER: | |
d29a5b6a | 3902 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3903 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); |
d29a5b6a | 3904 | break; |
c66ac9db | 3905 | case PRO_RESERVE: |
d29a5b6a CH |
3906 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3907 | break; | |
c66ac9db | 3908 | case PRO_RELEASE: |
d29a5b6a CH |
3909 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3910 | break; | |
c66ac9db | 3911 | case PRO_CLEAR: |
d29a5b6a CH |
3912 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3913 | break; | |
c66ac9db | 3914 | case PRO_PREEMPT: |
d29a5b6a | 3915 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3916 | res_key, sa_res_key, 0); |
d29a5b6a | 3917 | break; |
c66ac9db | 3918 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3919 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3920 | res_key, sa_res_key, 1); |
d29a5b6a | 3921 | break; |
c66ac9db | 3922 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3923 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3924 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); |
d29a5b6a | 3925 | break; |
c66ac9db | 3926 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3927 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3928 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3929 | break; |
c66ac9db | 3930 | default: |
6708bb27 | 3931 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3932 | " action: 0x%02x\n", cdb[1] & 0x1f); |
03e98c9e NB |
3933 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3934 | ret = -EINVAL; | |
d29a5b6a | 3935 | break; |
c66ac9db NB |
3936 | } |
3937 | ||
d29a5b6a | 3938 | out: |
6bb35e00 CH |
3939 | if (!ret) |
3940 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3941 | return ret; |
c66ac9db NB |
3942 | } |
3943 | ||
3944 | /* | |
3945 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3946 | * | |
3947 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3948 | */ | |
3949 | static int core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
3950 | { | |
5951146d | 3951 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 3952 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 3953 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3954 | unsigned char *buf; |
c66ac9db NB |
3955 | u32 add_len = 0, off = 8; |
3956 | ||
3957 | if (cmd->data_length < 8) { | |
6708bb27 | 3958 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3959 | " too small\n", cmd->data_length); |
03e98c9e NB |
3960 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3961 | return -EINVAL; | |
c66ac9db NB |
3962 | } |
3963 | ||
4949314c | 3964 | buf = transport_kmap_data_sg(cmd); |
e3d6f909 AG |
3965 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
3966 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
3967 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
3968 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3969 | |
e3d6f909 AG |
3970 | spin_lock(&su_dev->t10_pr.registration_lock); |
3971 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
3972 | pr_reg_list) { |
3973 | /* | |
3974 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3975 | * next reservation key list descriptor. | |
3976 | */ | |
3977 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3978 | break; | |
3979 | ||
3980 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3981 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3982 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3983 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3984 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3985 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3986 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3987 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3988 | ||
3989 | add_len += 8; | |
3990 | } | |
e3d6f909 | 3991 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db NB |
3992 | |
3993 | buf[4] = ((add_len >> 24) & 0xff); | |
3994 | buf[5] = ((add_len >> 16) & 0xff); | |
3995 | buf[6] = ((add_len >> 8) & 0xff); | |
3996 | buf[7] = (add_len & 0xff); | |
3997 | ||
4949314c | 3998 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3999 | |
c66ac9db NB |
4000 | return 0; |
4001 | } | |
4002 | ||
4003 | /* | |
4004 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
4005 | * | |
4006 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
4007 | */ | |
4008 | static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
4009 | { | |
5951146d | 4010 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 4011 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 4012 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 4013 | unsigned char *buf; |
c66ac9db NB |
4014 | u64 pr_res_key; |
4015 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
4016 | ||
4017 | if (cmd->data_length < 8) { | |
6708bb27 | 4018 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 4019 | " too small\n", cmd->data_length); |
03e98c9e NB |
4020 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4021 | return -EINVAL; | |
c66ac9db NB |
4022 | } |
4023 | ||
4949314c | 4024 | buf = transport_kmap_data_sg(cmd); |
e3d6f909 AG |
4025 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4026 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4027 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4028 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4029 | |
4030 | spin_lock(&se_dev->dev_reservation_lock); | |
4031 | pr_reg = se_dev->dev_pr_res_holder; | |
4032 | if ((pr_reg)) { | |
4033 | /* | |
4034 | * Set the hardcoded Additional Length | |
4035 | */ | |
4036 | buf[4] = ((add_len >> 24) & 0xff); | |
4037 | buf[5] = ((add_len >> 16) & 0xff); | |
4038 | buf[6] = ((add_len >> 8) & 0xff); | |
4039 | buf[7] = (add_len & 0xff); | |
4040 | ||
05d1c7c0 AG |
4041 | if (cmd->data_length < 22) |
4042 | goto err; | |
4043 | ||
c66ac9db NB |
4044 | /* |
4045 | * Set the Reservation key. | |
4046 | * | |
4047 | * From spc4r17, section 5.7.10: | |
4048 | * A persistent reservation holder has its reservation key | |
4049 | * returned in the parameter data from a PERSISTENT | |
4050 | * RESERVE IN command with READ RESERVATION service action as | |
4051 | * follows: | |
4052 | * a) For a persistent reservation of the type Write Exclusive | |
4053 | * - All Registrants or Exclusive Access  All Regitrants, | |
4054 | * the reservation key shall be set to zero; or | |
4055 | * b) For all other persistent reservation types, the | |
4056 | * reservation key shall be set to the registered | |
4057 | * reservation key for the I_T nexus that holds the | |
4058 | * persistent reservation. | |
4059 | */ | |
4060 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
4061 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
4062 | pr_res_key = 0; | |
4063 | else | |
4064 | pr_res_key = pr_reg->pr_res_key; | |
4065 | ||
4066 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
4067 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
4068 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
4069 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
4070 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
4071 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
4072 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
4073 | buf[15] = (pr_res_key & 0xff); | |
4074 | /* | |
4075 | * Set the SCOPE and TYPE | |
4076 | */ | |
4077 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
4078 | (pr_reg->pr_res_type & 0x0f); | |
4079 | } | |
05d1c7c0 AG |
4080 | |
4081 | err: | |
c66ac9db | 4082 | spin_unlock(&se_dev->dev_reservation_lock); |
4949314c | 4083 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
4084 | |
4085 | return 0; | |
4086 | } | |
4087 | ||
4088 | /* | |
4089 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
4090 | * | |
4091 | * See spc4r17 section 6.13.4 Table 165 | |
4092 | */ | |
4093 | static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
4094 | { | |
5951146d | 4095 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 4096 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4097 | unsigned char *buf; |
c66ac9db NB |
4098 | u16 add_len = 8; /* Hardcoded to 8. */ |
4099 | ||
4100 | if (cmd->data_length < 6) { | |
6708bb27 | 4101 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 4102 | " %u too small\n", cmd->data_length); |
03e98c9e NB |
4103 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4104 | return -EINVAL; | |
c66ac9db NB |
4105 | } |
4106 | ||
4949314c | 4107 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 4108 | |
c66ac9db NB |
4109 | buf[0] = ((add_len << 8) & 0xff); |
4110 | buf[1] = (add_len & 0xff); | |
4111 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
4112 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
4113 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
4114 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
4115 | /* | |
4116 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
4117 | * set the TMV: Task Mask Valid bit. | |
4118 | */ | |
4119 | buf[3] |= 0x80; | |
4120 | /* | |
4121 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
4122 | */ | |
4123 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
4124 | /* | |
4125 | * PTPL_A: Persistence across Target Power Loss Active bit | |
4126 | */ | |
4127 | if (pr_tmpl->pr_aptpl_active) | |
4128 | buf[3] |= 0x01; | |
4129 | /* | |
4130 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
4131 | */ | |
4132 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4133 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
4134 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
4135 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
4136 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
4137 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4138 | ||
4949314c | 4139 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4140 | |
c66ac9db NB |
4141 | return 0; |
4142 | } | |
4143 | ||
4144 | /* | |
4145 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
4146 | * | |
4147 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
4148 | */ | |
4149 | static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
4150 | { | |
5951146d | 4151 | struct se_device *se_dev = cmd->se_dev; |
c66ac9db | 4152 | struct se_node_acl *se_nacl; |
e3d6f909 | 4153 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db NB |
4154 | struct se_portal_group *se_tpg; |
4155 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 4156 | struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4157 | unsigned char *buf; |
c66ac9db NB |
4158 | u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; |
4159 | u32 off = 8; /* off into first Full Status descriptor */ | |
4160 | int format_code = 0; | |
4161 | ||
4162 | if (cmd->data_length < 8) { | |
6708bb27 | 4163 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 4164 | " too small\n", cmd->data_length); |
03e98c9e NB |
4165 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4166 | return -EINVAL; | |
c66ac9db NB |
4167 | } |
4168 | ||
4949314c | 4169 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 4170 | |
e3d6f909 AG |
4171 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4172 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4173 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4174 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4175 | |
4176 | spin_lock(&pr_tmpl->registration_lock); | |
4177 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
4178 | &pr_tmpl->registration_list, pr_reg_list) { | |
4179 | ||
4180 | se_nacl = pr_reg->pr_reg_nacl; | |
4181 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
4182 | add_desc_len = 0; | |
4183 | ||
4184 | atomic_inc(&pr_reg->pr_res_holders); | |
4185 | smp_mb__after_atomic_inc(); | |
4186 | spin_unlock(&pr_tmpl->registration_lock); | |
4187 | /* | |
4188 | * Determine expected length of $FABRIC_MOD specific | |
4189 | * TransportID full status descriptor.. | |
4190 | */ | |
e3d6f909 | 4191 | exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( |
c66ac9db NB |
4192 | se_tpg, se_nacl, pr_reg, &format_code); |
4193 | ||
4194 | if ((exp_desc_len + add_len) > cmd->data_length) { | |
6708bb27 | 4195 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
4196 | " out of buffer: %d\n", cmd->data_length); |
4197 | spin_lock(&pr_tmpl->registration_lock); | |
4198 | atomic_dec(&pr_reg->pr_res_holders); | |
4199 | smp_mb__after_atomic_dec(); | |
4200 | break; | |
4201 | } | |
4202 | /* | |
4203 | * Set RESERVATION KEY | |
4204 | */ | |
4205 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4206 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4207 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4208 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4209 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4210 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4211 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4212 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4213 | off += 4; /* Skip Over Reserved area */ | |
4214 | ||
4215 | /* | |
4216 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4217 | */ | |
4218 | if (pr_reg->pr_reg_all_tg_pt) | |
4219 | buf[off] = 0x02; | |
4220 | /* | |
4221 | * The struct se_lun pointer will be present for the | |
4222 | * reservation holder for PR_HOLDER bit. | |
4223 | * | |
4224 | * Also, if this registration is the reservation | |
4225 | * holder, fill in SCOPE and TYPE in the next byte. | |
4226 | */ | |
4227 | if (pr_reg->pr_res_holder) { | |
4228 | buf[off++] |= 0x01; | |
4229 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4230 | (pr_reg->pr_res_type & 0x0f); | |
4231 | } else | |
4232 | off += 2; | |
4233 | ||
4234 | off += 4; /* Skip over reserved area */ | |
4235 | /* | |
4236 | * From spc4r17 6.3.15: | |
4237 | * | |
4238 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4239 | * IDENTIFIER field contains the relative port identifier (see | |
4240 | * 3.1.120) of the target port that is part of the I_T nexus | |
4241 | * described by this full status descriptor. If the ALL_TG_PT | |
4242 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4243 | * IDENTIFIER field are not defined by this standard. | |
4244 | */ | |
6708bb27 | 4245 | if (!pr_reg->pr_reg_all_tg_pt) { |
c66ac9db NB |
4246 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
4247 | ||
4248 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
4249 | buf[off++] = (port->sep_rtpi & 0xff); | |
4250 | } else | |
4251 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ | |
4252 | ||
4253 | /* | |
4254 | * Now, have the $FABRIC_MOD fill in the protocol identifier | |
4255 | */ | |
e3d6f909 | 4256 | desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, |
c66ac9db NB |
4257 | se_nacl, pr_reg, &format_code, &buf[off+4]); |
4258 | ||
4259 | spin_lock(&pr_tmpl->registration_lock); | |
4260 | atomic_dec(&pr_reg->pr_res_holders); | |
4261 | smp_mb__after_atomic_dec(); | |
4262 | /* | |
4263 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4264 | */ | |
4265 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4266 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4267 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4268 | buf[off++] = (desc_len & 0xff); | |
4269 | /* | |
4270 | * Size of full desctipor header minus TransportID | |
4271 | * containing $FABRIC_MOD specific) initiator device/port | |
4272 | * WWN information. | |
4273 | * | |
4274 | * See spc4r17 Section 6.13.5 Table 169 | |
4275 | */ | |
4276 | add_desc_len = (24 + desc_len); | |
4277 | ||
4278 | off += desc_len; | |
4279 | add_len += add_desc_len; | |
4280 | } | |
4281 | spin_unlock(&pr_tmpl->registration_lock); | |
4282 | /* | |
4283 | * Set ADDITIONAL_LENGTH | |
4284 | */ | |
4285 | buf[4] = ((add_len >> 24) & 0xff); | |
4286 | buf[5] = ((add_len >> 16) & 0xff); | |
4287 | buf[6] = ((add_len >> 8) & 0xff); | |
4288 | buf[7] = (add_len & 0xff); | |
4289 | ||
4949314c | 4290 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4291 | |
c66ac9db NB |
4292 | return 0; |
4293 | } | |
4294 | ||
6bb35e00 | 4295 | int target_scsi3_emulate_pr_in(struct se_cmd *cmd) |
c66ac9db | 4296 | { |
d29a5b6a | 4297 | int ret; |
e76a35d6 | 4298 | |
c66ac9db NB |
4299 | /* |
4300 | * Following spc2r20 5.5.1 Reservations overview: | |
4301 | * | |
4302 | * If a logical unit has been reserved by any RESERVE command and is | |
4303 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4304 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4305 | * initiator or service action and shall terminate with a RESERVATION | |
4306 | * CONFLICT status. | |
4307 | */ | |
617c0e06 | 4308 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { |
6708bb27 | 4309 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4310 | " SPC-2 reservation is held, returning" |
4311 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
4312 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
4313 | return -EINVAL; | |
c66ac9db NB |
4314 | } |
4315 | ||
617c0e06 CH |
4316 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4317 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4318 | ret = core_scsi3_pri_read_keys(cmd); |
4319 | break; | |
617c0e06 | 4320 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4321 | ret = core_scsi3_pri_read_reservation(cmd); |
4322 | break; | |
617c0e06 | 4323 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4324 | ret = core_scsi3_pri_report_capabilities(cmd); |
4325 | break; | |
617c0e06 | 4326 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4327 | ret = core_scsi3_pri_read_full_status(cmd); |
4328 | break; | |
617c0e06 CH |
4329 | default: |
4330 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4331 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
03e98c9e NB |
4332 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4333 | ret = -EINVAL; | |
d29a5b6a CH |
4334 | break; |
4335 | } | |
4336 | ||
6bb35e00 CH |
4337 | if (!ret) |
4338 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4339 | return ret; |
c66ac9db NB |
4340 | } |
4341 | ||
4342 | static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) | |
4343 | { | |
4344 | return 0; | |
4345 | } | |
4346 | ||
4347 | static int core_pt_seq_non_holder( | |
4348 | struct se_cmd *cmd, | |
4349 | unsigned char *cdb, | |
4350 | u32 pr_reg_type) | |
4351 | { | |
4352 | return 0; | |
4353 | } | |
4354 | ||
4355 | int core_setup_reservations(struct se_device *dev, int force_pt) | |
4356 | { | |
4357 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; | |
e3d6f909 | 4358 | struct t10_reservation *rest = &su_dev->t10_pr; |
c66ac9db NB |
4359 | /* |
4360 | * If this device is from Target_Core_Mod/pSCSI, use the reservations | |
4361 | * of the Underlying SCSI hardware. In Linux/SCSI terms, this can | |
4362 | * cause a problem because libata and some SATA RAID HBAs appear | |
4363 | * under Linux/SCSI, but to emulate reservations themselves. | |
4364 | */ | |
e3d6f909 AG |
4365 | if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && |
4366 | !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) { | |
c66ac9db NB |
4367 | rest->res_type = SPC_PASSTHROUGH; |
4368 | rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; | |
4369 | rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; | |
6708bb27 | 4370 | pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" |
e3d6f909 | 4371 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4372 | return 0; |
4373 | } | |
4374 | /* | |
4375 | * If SPC-3 or above is reported by real or emulated struct se_device, | |
4376 | * use emulated Persistent Reservations. | |
4377 | */ | |
e3d6f909 | 4378 | if (dev->transport->get_device_rev(dev) >= SCSI_3) { |
c66ac9db NB |
4379 | rest->res_type = SPC3_PERSISTENT_RESERVATIONS; |
4380 | rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; | |
4381 | rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; | |
6708bb27 | 4382 | pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" |
e3d6f909 | 4383 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4384 | } else { |
4385 | rest->res_type = SPC2_RESERVATIONS; | |
4386 | rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; | |
4387 | rest->pr_ops.t10_seq_non_holder = | |
4388 | &core_scsi2_reservation_seq_non_holder; | |
6708bb27 | 4389 | pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", |
e3d6f909 | 4390 | dev->transport->name); |
c66ac9db NB |
4391 | } |
4392 | ||
4393 | return 0; | |
4394 | } |