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 | ||
e76a35d6 | 196 | int target_scsi2_reservation_release(struct se_task *task) |
c66ac9db | 197 | { |
e76a35d6 | 198 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
199 | struct se_device *dev = cmd->se_dev; |
200 | struct se_session *sess = cmd->se_sess; | |
201 | struct se_portal_group *tpg = sess->se_tpg; | |
087a03b3 | 202 | int ret = 0, rc; |
c66ac9db | 203 | |
6708bb27 | 204 | if (!sess || !tpg) |
d29a5b6a | 205 | goto out; |
087a03b3 NB |
206 | rc = target_check_scsi2_reservation_conflict(cmd); |
207 | if (rc == 1) | |
d29a5b6a | 208 | goto out; |
087a03b3 NB |
209 | else if (rc < 0) { |
210 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
211 | ret = -EINVAL; | |
212 | goto out; | |
213 | } | |
c66ac9db | 214 | |
d29a5b6a | 215 | ret = 0; |
c66ac9db | 216 | spin_lock(&dev->dev_reservation_lock); |
d29a5b6a CH |
217 | if (!dev->dev_reserved_node_acl || !sess) |
218 | goto out_unlock; | |
219 | ||
220 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
221 | goto out_unlock; | |
c66ac9db | 222 | |
c66ac9db NB |
223 | dev->dev_reserved_node_acl = NULL; |
224 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; | |
225 | if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { | |
226 | dev->dev_res_bin_isid = 0; | |
227 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; | |
228 | } | |
6708bb27 | 229 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 AG |
230 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
231 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 232 | sess->se_node_acl->initiatorname); |
c66ac9db | 233 | |
d29a5b6a CH |
234 | out_unlock: |
235 | spin_unlock(&dev->dev_reservation_lock); | |
236 | out: | |
237 | if (!ret) { | |
238 | task->task_scsi_status = GOOD; | |
239 | transport_complete_task(task, 1); | |
240 | } | |
241 | return ret; | |
c66ac9db NB |
242 | } |
243 | ||
e76a35d6 | 244 | int target_scsi2_reservation_reserve(struct se_task *task) |
c66ac9db | 245 | { |
e76a35d6 | 246 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
247 | struct se_device *dev = cmd->se_dev; |
248 | struct se_session *sess = cmd->se_sess; | |
249 | struct se_portal_group *tpg = sess->se_tpg; | |
087a03b3 | 250 | int ret = 0, rc; |
c66ac9db | 251 | |
a1d8b49a AG |
252 | if ((cmd->t_task_cdb[1] & 0x01) && |
253 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 254 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 255 | " ILLEGAL_REQUEST\n"); |
03e98c9e NB |
256 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
257 | ret = -EINVAL; | |
d29a5b6a | 258 | goto out; |
c66ac9db NB |
259 | } |
260 | /* | |
261 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
262 | * ops | |
263 | */ | |
6708bb27 | 264 | if (!sess || !tpg) |
d29a5b6a | 265 | goto out; |
087a03b3 NB |
266 | rc = target_check_scsi2_reservation_conflict(cmd); |
267 | if (rc == 1) | |
d29a5b6a | 268 | goto out; |
087a03b3 NB |
269 | else if (rc < 0) { |
270 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
271 | ret = -EINVAL; | |
272 | goto out; | |
273 | } | |
c66ac9db | 274 | |
d29a5b6a | 275 | ret = 0; |
c66ac9db NB |
276 | spin_lock(&dev->dev_reservation_lock); |
277 | if (dev->dev_reserved_node_acl && | |
278 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 279 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 280 | tpg->se_tpg_tfo->get_fabric_name()); |
6708bb27 | 281 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 282 | cmd->se_lun->unpacked_lun, |
c66ac9db | 283 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 284 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 285 | " from %s \n", cmd->se_lun->unpacked_lun, |
c66ac9db NB |
286 | cmd->se_deve->mapped_lun, |
287 | sess->se_node_acl->initiatorname); | |
03e98c9e NB |
288 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
289 | ret = -EINVAL; | |
d29a5b6a | 290 | goto out_unlock; |
c66ac9db NB |
291 | } |
292 | ||
293 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
294 | dev->dev_flags |= DF_SPC2_RESERVATIONS; | |
295 | if (sess->sess_bin_isid != 0) { | |
296 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
297 | dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; | |
298 | } | |
6708bb27 | 299 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 AG |
300 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
301 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 302 | sess->se_node_acl->initiatorname); |
c66ac9db | 303 | |
d29a5b6a CH |
304 | out_unlock: |
305 | spin_unlock(&dev->dev_reservation_lock); | |
306 | out: | |
307 | if (!ret) { | |
308 | task->task_scsi_status = GOOD; | |
309 | transport_complete_task(task, 1); | |
310 | } | |
311 | return ret; | |
c66ac9db NB |
312 | } |
313 | ||
c66ac9db NB |
314 | |
315 | /* | |
316 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
317 | * | |
318 | * This function is called by those initiator ports who are *NOT* | |
319 | * the active PR reservation holder when a reservation is present. | |
320 | */ | |
321 | static int core_scsi3_pr_seq_non_holder( | |
322 | struct se_cmd *cmd, | |
323 | unsigned char *cdb, | |
324 | u32 pr_reg_type) | |
325 | { | |
326 | struct se_dev_entry *se_deve; | |
e3d6f909 | 327 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
328 | int other_cdb = 0, ignore_reg; |
329 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
330 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
331 | int we = 0; /* Write Exclusive */ | |
332 | int legacy = 0; /* Act like a legacy device and return | |
333 | * RESERVATION CONFLICT on some CDBs */ | |
334 | /* | |
335 | * A legacy SPC-2 reservation is being held. | |
336 | */ | |
337 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) | |
338 | return core_scsi2_reservation_seq_non_holder(cmd, | |
339 | cdb, pr_reg_type); | |
340 | ||
f2083241 | 341 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
342 | /* |
343 | * Determine if the registration should be ignored due to | |
344 | * non-matching ISIDs in core_scsi3_pr_reservation_check(). | |
345 | */ | |
346 | ignore_reg = (pr_reg_type & 0x80000000); | |
347 | if (ignore_reg) | |
348 | pr_reg_type &= ~0x80000000; | |
349 | ||
350 | switch (pr_reg_type) { | |
351 | case PR_TYPE_WRITE_EXCLUSIVE: | |
352 | we = 1; | |
353 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
354 | /* | |
355 | * Some commands are only allowed for the persistent reservation | |
356 | * holder. | |
357 | */ | |
358 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
359 | registered_nexus = 1; | |
360 | break; | |
361 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
362 | we = 1; | |
363 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
364 | /* | |
365 | * Some commands are only allowed for registered I_T Nexuses. | |
366 | */ | |
367 | reg_only = 1; | |
368 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
369 | registered_nexus = 1; | |
370 | break; | |
371 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
372 | we = 1; | |
373 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
374 | /* | |
375 | * Each registered I_T Nexus is a reservation holder. | |
376 | */ | |
377 | all_reg = 1; | |
378 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
379 | registered_nexus = 1; | |
380 | break; | |
381 | default: | |
e3d6f909 | 382 | return -EINVAL; |
c66ac9db NB |
383 | } |
384 | /* | |
385 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
386 | */ | |
387 | switch (cdb[0]) { | |
388 | case SECURITY_PROTOCOL_IN: | |
389 | if (registered_nexus) | |
390 | return 0; | |
391 | ret = (we) ? 0 : 1; | |
392 | break; | |
393 | case MODE_SENSE: | |
394 | case MODE_SENSE_10: | |
395 | case READ_ATTRIBUTE: | |
396 | case READ_BUFFER: | |
397 | case RECEIVE_DIAGNOSTIC: | |
398 | if (legacy) { | |
399 | ret = 1; | |
400 | break; | |
401 | } | |
402 | if (registered_nexus) { | |
403 | ret = 0; | |
404 | break; | |
405 | } | |
406 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
407 | break; | |
408 | case PERSISTENT_RESERVE_OUT: | |
409 | /* | |
410 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
411 | * are allowed in the presence of various reservations. | |
412 | * See spc4r17, table 46 | |
413 | */ | |
414 | switch (cdb[1] & 0x1f) { | |
415 | case PRO_CLEAR: | |
416 | case PRO_PREEMPT: | |
417 | case PRO_PREEMPT_AND_ABORT: | |
418 | ret = (registered_nexus) ? 0 : 1; | |
419 | break; | |
420 | case PRO_REGISTER: | |
421 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
422 | ret = 0; | |
423 | break; | |
424 | case PRO_REGISTER_AND_MOVE: | |
425 | case PRO_RESERVE: | |
426 | ret = 1; | |
427 | break; | |
428 | case PRO_RELEASE: | |
429 | ret = (registered_nexus) ? 0 : 1; | |
430 | break; | |
431 | default: | |
6708bb27 | 432 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 433 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 434 | return -EINVAL; |
c66ac9db NB |
435 | } |
436 | break; | |
437 | case RELEASE: | |
438 | case RELEASE_10: | |
eacac00c | 439 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
440 | ret = 0; |
441 | break; | |
442 | case RESERVE: | |
443 | case RESERVE_10: | |
eacac00c | 444 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
445 | ret = 0; |
446 | break; | |
447 | case TEST_UNIT_READY: | |
448 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
449 | break; | |
450 | case MAINTENANCE_IN: | |
451 | switch (cdb[1] & 0x1f) { | |
452 | case MI_MANAGEMENT_PROTOCOL_IN: | |
453 | if (registered_nexus) { | |
454 | ret = 0; | |
455 | break; | |
456 | } | |
457 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
458 | break; | |
459 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
460 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
461 | if (legacy) { | |
462 | ret = 1; | |
463 | break; | |
464 | } | |
465 | if (registered_nexus) { | |
466 | ret = 0; | |
467 | break; | |
468 | } | |
469 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
470 | break; | |
471 | case MI_REPORT_ALIASES: | |
472 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
473 | case MI_REPORT_PRIORITY: | |
474 | case MI_REPORT_TARGET_PGS: | |
475 | case MI_REPORT_TIMESTAMP: | |
476 | ret = 0; /* Allowed */ | |
477 | break; | |
478 | default: | |
6708bb27 | 479 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 480 | (cdb[1] & 0x1f)); |
e3d6f909 | 481 | return -EINVAL; |
c66ac9db NB |
482 | } |
483 | break; | |
484 | case ACCESS_CONTROL_IN: | |
485 | case ACCESS_CONTROL_OUT: | |
486 | case INQUIRY: | |
487 | case LOG_SENSE: | |
488 | case READ_MEDIA_SERIAL_NUMBER: | |
489 | case REPORT_LUNS: | |
490 | case REQUEST_SENSE: | |
6816966a | 491 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
492 | ret = 0; /*/ Allowed CDBs */ |
493 | break; | |
494 | default: | |
495 | other_cdb = 1; | |
496 | break; | |
497 | } | |
498 | /* | |
25985edc | 499 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
500 | * statement. |
501 | */ | |
6708bb27 | 502 | if (!ret && !other_cdb) { |
c66ac9db | 503 | #if 0 |
6708bb27 | 504 | pr_debug("Allowing explict CDB: 0x%02x for %s" |
c66ac9db NB |
505 | " reservation holder\n", cdb[0], |
506 | core_scsi3_pr_dump_type(pr_reg_type)); | |
507 | #endif | |
508 | return ret; | |
509 | } | |
510 | /* | |
511 | * Check if write exclusive initiator ports *NOT* holding the | |
512 | * WRITE_EXCLUSIVE_* reservation. | |
513 | */ | |
514 | if ((we) && !(registered_nexus)) { | |
515 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
516 | /* | |
517 | * Conflict for write exclusive | |
518 | */ | |
6708bb27 | 519 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
520 | " %s CDB: 0x%02x to %s reservation\n", |
521 | transport_dump_cmd_direction(cmd), | |
522 | se_sess->se_node_acl->initiatorname, cdb[0], | |
523 | core_scsi3_pr_dump_type(pr_reg_type)); | |
524 | return 1; | |
525 | } else { | |
526 | /* | |
527 | * Allow non WRITE CDBs for all Write Exclusive | |
528 | * PR TYPEs to pass for registered and | |
529 | * non-registered_nexuxes NOT holding the reservation. | |
530 | * | |
531 | * We only make noise for the unregisterd nexuses, | |
532 | * as we expect registered non-reservation holding | |
533 | * nexuses to issue CDBs. | |
534 | */ | |
535 | #if 0 | |
6708bb27 AG |
536 | if (!registered_nexus) { |
537 | pr_debug("Allowing implict CDB: 0x%02x" | |
c66ac9db NB |
538 | " for %s reservation on unregistered" |
539 | " nexus\n", cdb[0], | |
540 | core_scsi3_pr_dump_type(pr_reg_type)); | |
541 | } | |
542 | #endif | |
543 | return 0; | |
544 | } | |
545 | } else if ((reg_only) || (all_reg)) { | |
546 | if (registered_nexus) { | |
547 | /* | |
548 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
549 | * allow commands from registered nexuses. | |
550 | */ | |
551 | #if 0 | |
6708bb27 | 552 | pr_debug("Allowing implict CDB: 0x%02x for %s" |
c66ac9db NB |
553 | " reservation\n", cdb[0], |
554 | core_scsi3_pr_dump_type(pr_reg_type)); | |
555 | #endif | |
556 | return 0; | |
557 | } | |
558 | } | |
6708bb27 | 559 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
560 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
561 | (registered_nexus) ? "" : "un", | |
562 | se_sess->se_node_acl->initiatorname, cdb[0], | |
563 | core_scsi3_pr_dump_type(pr_reg_type)); | |
564 | ||
565 | return 1; /* Conflict by default */ | |
566 | } | |
567 | ||
568 | static u32 core_scsi3_pr_generation(struct se_device *dev) | |
569 | { | |
e3d6f909 | 570 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
571 | u32 prg; |
572 | /* | |
573 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
574 | * counter mainted by the device server. | |
575 | * | |
576 | * Note that this is done regardless of Active Persist across | |
577 | * Target PowerLoss (APTPL) | |
578 | * | |
579 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
580 | */ | |
581 | spin_lock(&dev->dev_reservation_lock); | |
e3d6f909 | 582 | prg = su_dev->t10_pr.pr_generation++; |
c66ac9db NB |
583 | spin_unlock(&dev->dev_reservation_lock); |
584 | ||
585 | return prg; | |
586 | } | |
587 | ||
588 | static int core_scsi3_pr_reservation_check( | |
589 | struct se_cmd *cmd, | |
590 | u32 *pr_reg_type) | |
591 | { | |
592 | struct se_device *dev = cmd->se_dev; | |
593 | struct se_session *sess = cmd->se_sess; | |
594 | int ret; | |
595 | ||
6708bb27 | 596 | if (!sess) |
c66ac9db NB |
597 | return 0; |
598 | /* | |
599 | * A legacy SPC-2 reservation is being held. | |
600 | */ | |
601 | if (dev->dev_flags & DF_SPC2_RESERVATIONS) | |
602 | return core_scsi2_reservation_check(cmd, pr_reg_type); | |
603 | ||
604 | spin_lock(&dev->dev_reservation_lock); | |
6708bb27 | 605 | if (!dev->dev_pr_res_holder) { |
c66ac9db NB |
606 | spin_unlock(&dev->dev_reservation_lock); |
607 | return 0; | |
608 | } | |
609 | *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
610 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
611 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { | |
612 | spin_unlock(&dev->dev_reservation_lock); | |
e3d6f909 | 613 | return -EINVAL; |
c66ac9db | 614 | } |
6708bb27 | 615 | if (!dev->dev_pr_res_holder->isid_present_at_reg) { |
c66ac9db NB |
616 | spin_unlock(&dev->dev_reservation_lock); |
617 | return 0; | |
618 | } | |
619 | ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == | |
e3d6f909 | 620 | sess->sess_bin_isid) ? 0 : -EINVAL; |
c66ac9db NB |
621 | /* |
622 | * Use bit in *pr_reg_type to notify ISID mismatch in | |
623 | * core_scsi3_pr_seq_non_holder(). | |
624 | */ | |
625 | if (ret != 0) | |
626 | *pr_reg_type |= 0x80000000; | |
627 | spin_unlock(&dev->dev_reservation_lock); | |
628 | ||
629 | return ret; | |
630 | } | |
631 | ||
632 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( | |
633 | struct se_device *dev, | |
634 | struct se_node_acl *nacl, | |
635 | struct se_dev_entry *deve, | |
636 | unsigned char *isid, | |
637 | u64 sa_res_key, | |
638 | int all_tg_pt, | |
639 | int aptpl) | |
640 | { | |
e3d6f909 | 641 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
642 | struct t10_pr_registration *pr_reg; |
643 | ||
644 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
645 | if (!pr_reg) { |
646 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
647 | return NULL; |
648 | } | |
649 | ||
e3d6f909 | 650 | pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len, |
c66ac9db | 651 | GFP_ATOMIC); |
6708bb27 AG |
652 | if (!pr_reg->pr_aptpl_buf) { |
653 | pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); | |
c66ac9db NB |
654 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
655 | return NULL; | |
656 | } | |
657 | ||
658 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
659 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
660 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
661 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
662 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
663 | atomic_set(&pr_reg->pr_res_holders, 0); | |
664 | pr_reg->pr_reg_nacl = nacl; | |
665 | pr_reg->pr_reg_deve = deve; | |
666 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
667 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
668 | pr_reg->pr_res_key = sa_res_key; | |
669 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
670 | pr_reg->pr_reg_aptpl = aptpl; | |
671 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
672 | /* | |
673 | * If an ISID value for this SCSI Initiator Port exists, | |
674 | * save it to the registration now. | |
675 | */ | |
676 | if (isid != NULL) { | |
677 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
678 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
679 | pr_reg->isid_present_at_reg = 1; | |
680 | } | |
681 | ||
682 | return pr_reg; | |
683 | } | |
684 | ||
685 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
686 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
687 | ||
688 | /* | |
689 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
690 | * modes. | |
691 | */ | |
692 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
693 | struct se_device *dev, | |
694 | struct se_node_acl *nacl, | |
695 | struct se_dev_entry *deve, | |
696 | unsigned char *isid, | |
697 | u64 sa_res_key, | |
698 | int all_tg_pt, | |
699 | int aptpl) | |
700 | { | |
701 | struct se_dev_entry *deve_tmp; | |
702 | struct se_node_acl *nacl_tmp; | |
703 | struct se_port *port, *port_tmp; | |
704 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
705 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; | |
706 | int ret; | |
707 | /* | |
708 | * Create a registration for the I_T Nexus upon which the | |
709 | * PROUT REGISTER was received. | |
710 | */ | |
711 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
712 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 713 | if (!pr_reg) |
c66ac9db NB |
714 | return NULL; |
715 | /* | |
716 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
717 | */ | |
6708bb27 | 718 | if (!all_tg_pt) |
c66ac9db NB |
719 | return pr_reg; |
720 | /* | |
721 | * Create list of matching SCSI Initiator Port registrations | |
722 | * for ALL_TG_PT=1 | |
723 | */ | |
724 | spin_lock(&dev->se_port_lock); | |
725 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
726 | atomic_inc(&port->sep_tg_pt_ref_cnt); | |
727 | smp_mb__after_atomic_inc(); | |
728 | spin_unlock(&dev->se_port_lock); | |
729 | ||
730 | spin_lock_bh(&port->sep_alua_lock); | |
731 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
732 | alua_port_list) { | |
733 | /* | |
734 | * This pointer will be NULL for demo mode MappedLUNs | |
735 | * that have not been make explict via a ConfigFS | |
736 | * MappedLUN group for the SCSI Initiator Node ACL. | |
737 | */ | |
6708bb27 | 738 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
739 | continue; |
740 | ||
741 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
742 | /* | |
743 | * Skip the matching struct se_node_acl that is allocated | |
744 | * above.. | |
745 | */ | |
746 | if (nacl == nacl_tmp) | |
747 | continue; | |
748 | /* | |
749 | * Only perform PR registrations for target ports on | |
750 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
751 | * arrived. | |
752 | */ | |
753 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
754 | continue; | |
755 | /* | |
756 | * Look for a matching Initiator Node ACL in ASCII format | |
757 | */ | |
758 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
759 | continue; | |
760 | ||
761 | atomic_inc(&deve_tmp->pr_ref_count); | |
762 | smp_mb__after_atomic_inc(); | |
763 | spin_unlock_bh(&port->sep_alua_lock); | |
764 | /* | |
765 | * Grab a configfs group dependency that is released | |
766 | * for the exception path at label out: below, or upon | |
767 | * completion of adding ALL_TG_PT=1 registrations in | |
768 | * __core_scsi3_add_registration() | |
769 | */ | |
770 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
771 | if (ret < 0) { | |
6708bb27 | 772 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db NB |
773 | "_item() failed\n"); |
774 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
775 | smp_mb__after_atomic_dec(); | |
776 | atomic_dec(&deve_tmp->pr_ref_count); | |
777 | smp_mb__after_atomic_dec(); | |
778 | goto out; | |
779 | } | |
780 | /* | |
781 | * Located a matching SCSI Initiator Port on a different | |
782 | * port, allocate the pr_reg_atp and attach it to the | |
783 | * pr_reg->pr_reg_atp_list that will be processed once | |
784 | * the original *pr_reg is processed in | |
785 | * __core_scsi3_add_registration() | |
786 | */ | |
787 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
788 | nacl_tmp, deve_tmp, NULL, | |
789 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 790 | if (!pr_reg_atp) { |
c66ac9db NB |
791 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
792 | smp_mb__after_atomic_dec(); | |
793 | atomic_dec(&deve_tmp->pr_ref_count); | |
794 | smp_mb__after_atomic_dec(); | |
795 | core_scsi3_lunacl_undepend_item(deve_tmp); | |
796 | goto out; | |
797 | } | |
798 | ||
799 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
800 | &pr_reg->pr_reg_atp_list); | |
801 | spin_lock_bh(&port->sep_alua_lock); | |
802 | } | |
803 | spin_unlock_bh(&port->sep_alua_lock); | |
804 | ||
805 | spin_lock(&dev->se_port_lock); | |
806 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
807 | smp_mb__after_atomic_dec(); | |
808 | } | |
809 | spin_unlock(&dev->se_port_lock); | |
810 | ||
811 | return pr_reg; | |
812 | out: | |
813 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
814 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
815 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
816 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
817 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
818 | } | |
819 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
820 | return NULL; | |
821 | } | |
822 | ||
823 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 824 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
825 | u64 sa_res_key, |
826 | unsigned char *i_port, | |
827 | unsigned char *isid, | |
828 | u32 mapped_lun, | |
829 | unsigned char *t_port, | |
830 | u16 tpgt, | |
831 | u32 target_lun, | |
832 | int res_holder, | |
833 | int all_tg_pt, | |
834 | u8 type) | |
835 | { | |
836 | struct t10_pr_registration *pr_reg; | |
837 | ||
6708bb27 AG |
838 | if (!i_port || !t_port || !sa_res_key) { |
839 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 840 | return -EINVAL; |
c66ac9db NB |
841 | } |
842 | ||
843 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
844 | if (!pr_reg) { |
845 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 846 | return -ENOMEM; |
c66ac9db NB |
847 | } |
848 | pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); | |
849 | ||
850 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
851 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
852 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
853 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
854 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
855 | atomic_set(&pr_reg->pr_res_holders, 0); | |
856 | pr_reg->pr_reg_nacl = NULL; | |
857 | pr_reg->pr_reg_deve = NULL; | |
858 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
859 | pr_reg->pr_aptpl_target_lun = target_lun; | |
860 | pr_reg->pr_res_key = sa_res_key; | |
861 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
862 | pr_reg->pr_reg_aptpl = 1; | |
863 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
864 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
865 | pr_reg->pr_res_type = type; | |
866 | /* | |
867 | * If an ISID value had been saved in APTPL metadata for this | |
868 | * SCSI Initiator Port, restore it now. | |
869 | */ | |
870 | if (isid != NULL) { | |
871 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
872 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
873 | pr_reg->isid_present_at_reg = 1; | |
874 | } | |
875 | /* | |
876 | * Copy the i_port and t_port information from caller. | |
877 | */ | |
878 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
879 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
880 | pr_reg->pr_reg_tpgt = tpgt; | |
881 | /* | |
882 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
883 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
884 | * the Initiator Node LUN ACL from the fabric module is created for | |
885 | * this registration. | |
886 | */ | |
887 | pr_reg->pr_res_holder = res_holder; | |
888 | ||
889 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 890 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
891 | " metadata\n", (res_holder) ? "+reservation" : ""); |
892 | return 0; | |
893 | } | |
894 | ||
895 | static void core_scsi3_aptpl_reserve( | |
896 | struct se_device *dev, | |
897 | struct se_portal_group *tpg, | |
898 | struct se_node_acl *node_acl, | |
899 | struct t10_pr_registration *pr_reg) | |
900 | { | |
901 | char i_buf[PR_REG_ISID_ID_LEN]; | |
902 | int prf_isid; | |
903 | ||
904 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
905 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
906 | PR_REG_ISID_ID_LEN); | |
907 | ||
908 | spin_lock(&dev->dev_reservation_lock); | |
909 | dev->dev_pr_res_holder = pr_reg; | |
910 | spin_unlock(&dev->dev_reservation_lock); | |
911 | ||
6708bb27 | 912 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 913 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 914 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
915 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
916 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 917 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 918 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
c66ac9db NB |
919 | (prf_isid) ? &i_buf[0] : ""); |
920 | } | |
921 | ||
922 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
923 | struct t10_pr_registration *, int, int); | |
924 | ||
925 | static int __core_scsi3_check_aptpl_registration( | |
926 | struct se_device *dev, | |
927 | struct se_portal_group *tpg, | |
928 | struct se_lun *lun, | |
929 | u32 target_lun, | |
930 | struct se_node_acl *nacl, | |
931 | struct se_dev_entry *deve) | |
932 | { | |
933 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 934 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
935 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
936 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
937 | u16 tpgt; | |
938 | ||
939 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
940 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
941 | /* | |
942 | * Copy Initiator Port information from struct se_node_acl | |
943 | */ | |
944 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
945 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
946 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
947 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
948 | /* |
949 | * Look for the matching registrations+reservation from those | |
950 | * created from APTPL metadata. Note that multiple registrations | |
951 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
952 | * TransportIDs. | |
953 | */ | |
954 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
955 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
956 | pr_reg_aptpl_list) { | |
6708bb27 | 957 | if (!strcmp(pr_reg->pr_iport, i_port) && |
c66ac9db NB |
958 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
959 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
960 | (pr_reg->pr_reg_tpgt == tpgt) && | |
961 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
962 | ||
963 | pr_reg->pr_reg_nacl = nacl; | |
964 | pr_reg->pr_reg_deve = deve; | |
965 | pr_reg->pr_reg_tg_pt_lun = lun; | |
966 | ||
967 | list_del(&pr_reg->pr_reg_aptpl_list); | |
968 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
969 | /* | |
970 | * At this point all of the pointers in *pr_reg will | |
971 | * be setup, so go ahead and add the registration. | |
972 | */ | |
973 | ||
974 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
975 | /* | |
976 | * If this registration is the reservation holder, | |
977 | * make that happen now.. | |
978 | */ | |
979 | if (pr_reg->pr_res_holder) | |
980 | core_scsi3_aptpl_reserve(dev, tpg, | |
981 | nacl, pr_reg); | |
982 | /* | |
983 | * Reenable pr_aptpl_active to accept new metadata | |
984 | * updates once the SCSI device is active again.. | |
985 | */ | |
986 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
987 | pr_tmpl->pr_aptpl_active = 1; | |
988 | } | |
989 | } | |
990 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | int core_scsi3_check_aptpl_registration( | |
996 | struct se_device *dev, | |
997 | struct se_portal_group *tpg, | |
998 | struct se_lun *lun, | |
999 | struct se_lun_acl *lun_acl) | |
1000 | { | |
e3d6f909 | 1001 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db | 1002 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; |
f2083241 | 1003 | struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; |
c66ac9db | 1004 | |
e3d6f909 | 1005 | if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) |
c66ac9db NB |
1006 | return 0; |
1007 | ||
1008 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
1009 | lun->unpacked_lun, nacl, deve); | |
1010 | } | |
1011 | ||
1012 | static void __core_scsi3_dump_registration( | |
1013 | struct target_core_fabric_ops *tfo, | |
1014 | struct se_device *dev, | |
1015 | struct se_node_acl *nacl, | |
1016 | struct t10_pr_registration *pr_reg, | |
1017 | int register_type) | |
1018 | { | |
1019 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1020 | char i_buf[PR_REG_ISID_ID_LEN]; | |
1021 | int prf_isid; | |
1022 | ||
1023 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
1024 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1025 | PR_REG_ISID_ID_LEN); | |
1026 | ||
6708bb27 | 1027 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
c66ac9db NB |
1028 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? |
1029 | "_AND_MOVE" : (register_type == 1) ? | |
1030 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, | |
1031 | (prf_isid) ? i_buf : ""); | |
6708bb27 | 1032 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
1033 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1034 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1035 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1036 | " Port(s)\n", tfo->get_fabric_name(), |
1037 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1038 | dev->transport->name); |
6708bb27 | 1039 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1040 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1041 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1042 | pr_reg->pr_reg_aptpl); | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * this function can be called with struct se_device->dev_reservation_lock | |
1047 | * when register_move = 1 | |
1048 | */ | |
1049 | static void __core_scsi3_add_registration( | |
1050 | struct se_device *dev, | |
1051 | struct se_node_acl *nacl, | |
1052 | struct t10_pr_registration *pr_reg, | |
1053 | int register_type, | |
1054 | int register_move) | |
1055 | { | |
e3d6f909 | 1056 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1057 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
1058 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
e3d6f909 | 1059 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1060 | |
1061 | /* | |
1062 | * Increment PRgeneration counter for struct se_device upon a successful | |
1063 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1064 | * | |
1065 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1066 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1067 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1068 | * for the REGISTER. | |
1069 | */ | |
1070 | pr_reg->pr_res_generation = (register_move) ? | |
e3d6f909 | 1071 | su_dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1072 | core_scsi3_pr_generation(dev); |
1073 | ||
1074 | spin_lock(&pr_tmpl->registration_lock); | |
1075 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1076 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1077 | ||
1078 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1079 | spin_unlock(&pr_tmpl->registration_lock); | |
1080 | /* | |
1081 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1082 | */ | |
6708bb27 | 1083 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1084 | return; |
1085 | /* | |
1086 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1087 | * allocated in __core_scsi3_alloc_registration() | |
1088 | */ | |
1089 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1090 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1091 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1092 | ||
1093 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1094 | ||
1095 | spin_lock(&pr_tmpl->registration_lock); | |
1096 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1097 | &pr_tmpl->registration_list); | |
1098 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1099 | ||
1100 | __core_scsi3_dump_registration(tfo, dev, | |
1101 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1102 | register_type); | |
1103 | spin_unlock(&pr_tmpl->registration_lock); | |
1104 | /* | |
1105 | * Drop configfs group dependency reference from | |
1106 | * __core_scsi3_alloc_registration() | |
1107 | */ | |
1108 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | static int core_scsi3_alloc_registration( | |
1113 | struct se_device *dev, | |
1114 | struct se_node_acl *nacl, | |
1115 | struct se_dev_entry *deve, | |
1116 | unsigned char *isid, | |
1117 | u64 sa_res_key, | |
1118 | int all_tg_pt, | |
1119 | int aptpl, | |
1120 | int register_type, | |
1121 | int register_move) | |
1122 | { | |
1123 | struct t10_pr_registration *pr_reg; | |
1124 | ||
1125 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1126 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1127 | if (!pr_reg) |
e3d6f909 | 1128 | return -EPERM; |
c66ac9db NB |
1129 | |
1130 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1131 | register_type, register_move); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1136 | struct se_device *dev, | |
1137 | struct se_node_acl *nacl, | |
1138 | unsigned char *isid) | |
1139 | { | |
e3d6f909 | 1140 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1141 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1142 | struct se_portal_group *tpg; | |
1143 | ||
1144 | spin_lock(&pr_tmpl->registration_lock); | |
1145 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1146 | &pr_tmpl->registration_list, pr_reg_list) { | |
1147 | /* | |
1148 | * First look for a matching struct se_node_acl | |
1149 | */ | |
1150 | if (pr_reg->pr_reg_nacl != nacl) | |
1151 | continue; | |
1152 | ||
1153 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1154 | /* | |
1155 | * If this registration does NOT contain a fabric provided | |
1156 | * ISID, then we have found a match. | |
1157 | */ | |
6708bb27 | 1158 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1159 | /* |
1160 | * Determine if this SCSI device server requires that | |
1161 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1162 | * for fabric modules (iSCSI) requiring them. | |
1163 | */ | |
e3d6f909 AG |
1164 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
1165 | if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) | |
c66ac9db NB |
1166 | continue; |
1167 | } | |
1168 | atomic_inc(&pr_reg->pr_res_holders); | |
1169 | smp_mb__after_atomic_inc(); | |
1170 | spin_unlock(&pr_tmpl->registration_lock); | |
1171 | return pr_reg; | |
1172 | } | |
1173 | /* | |
1174 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1175 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1176 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1177 | */ | |
6708bb27 | 1178 | if (!isid) |
c66ac9db NB |
1179 | continue; |
1180 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1181 | continue; | |
1182 | ||
1183 | atomic_inc(&pr_reg->pr_res_holders); | |
1184 | smp_mb__after_atomic_inc(); | |
1185 | spin_unlock(&pr_tmpl->registration_lock); | |
1186 | return pr_reg; | |
1187 | } | |
1188 | spin_unlock(&pr_tmpl->registration_lock); | |
1189 | ||
1190 | return NULL; | |
1191 | } | |
1192 | ||
1193 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1194 | struct se_device *dev, | |
1195 | struct se_node_acl *nacl, | |
1196 | struct se_session *sess) | |
1197 | { | |
1198 | struct se_portal_group *tpg = nacl->se_tpg; | |
1199 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1200 | ||
e3d6f909 | 1201 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1202 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1203 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1204 | PR_REG_ISID_LEN); |
1205 | isid_ptr = &buf[0]; | |
1206 | } | |
1207 | ||
1208 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1209 | } | |
1210 | ||
1211 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1212 | { | |
1213 | atomic_dec(&pr_reg->pr_res_holders); | |
1214 | smp_mb__after_atomic_dec(); | |
1215 | } | |
1216 | ||
1217 | static int core_scsi3_check_implict_release( | |
1218 | struct se_device *dev, | |
1219 | struct t10_pr_registration *pr_reg) | |
1220 | { | |
1221 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1222 | struct t10_pr_registration *pr_res_holder; | |
1223 | int ret = 0; | |
1224 | ||
1225 | spin_lock(&dev->dev_reservation_lock); | |
1226 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1227 | if (!pr_res_holder) { |
c66ac9db NB |
1228 | spin_unlock(&dev->dev_reservation_lock); |
1229 | return ret; | |
1230 | } | |
1231 | if (pr_res_holder == pr_reg) { | |
1232 | /* | |
1233 | * Perform an implict RELEASE if the registration that | |
1234 | * is being released is holding the reservation. | |
1235 | * | |
1236 | * From spc4r17, section 5.7.11.1: | |
1237 | * | |
1238 | * e) If the I_T nexus is the persistent reservation holder | |
1239 | * and the persistent reservation is not an all registrants | |
1240 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1241 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1242 | * service action with the SERVICE ACTION RESERVATION KEY | |
1243 | * field set to zero (see 5.7.11.3). | |
1244 | */ | |
1245 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); | |
1246 | ret = 1; | |
1247 | /* | |
1248 | * For 'All Registrants' reservation types, all existing | |
1249 | * registrations are still processed as reservation holders | |
1250 | * in core_scsi3_pr_seq_non_holder() after the initial | |
1251 | * reservation holder is implictly released here. | |
1252 | */ | |
1253 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1254 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1255 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1256 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1257 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1258 | " UNREGISTER while existing reservation with matching" |
1259 | " key 0x%016Lx is present from another SCSI Initiator" | |
1260 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1261 | ret = -EPERM; |
c66ac9db NB |
1262 | } |
1263 | spin_unlock(&dev->dev_reservation_lock); | |
1264 | ||
1265 | return ret; | |
1266 | } | |
1267 | ||
1268 | /* | |
e3d6f909 | 1269 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1270 | */ |
1271 | static void __core_scsi3_free_registration( | |
1272 | struct se_device *dev, | |
1273 | struct t10_pr_registration *pr_reg, | |
1274 | struct list_head *preempt_and_abort_list, | |
1275 | int dec_holders) | |
1276 | { | |
1277 | struct target_core_fabric_ops *tfo = | |
1278 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; | |
e3d6f909 | 1279 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1280 | char i_buf[PR_REG_ISID_ID_LEN]; |
1281 | int prf_isid; | |
1282 | ||
1283 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1284 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1285 | PR_REG_ISID_ID_LEN); | |
1286 | ||
1287 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1288 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
1289 | list_del(&pr_reg->pr_reg_list); | |
1290 | /* | |
1291 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1292 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1293 | */ | |
1294 | if (dec_holders) | |
1295 | core_scsi3_put_pr_reg(pr_reg); | |
1296 | /* | |
1297 | * Wait until all reference from any other I_T nexuses for this | |
1298 | * *pr_reg have been released. Because list_del() is called above, | |
1299 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1300 | * count back to zero, and we release *pr_reg. | |
1301 | */ | |
1302 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1303 | spin_unlock(&pr_tmpl->registration_lock); | |
6708bb27 | 1304 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1305 | tfo->get_fabric_name()); |
1306 | cpu_relax(); | |
1307 | spin_lock(&pr_tmpl->registration_lock); | |
1308 | } | |
1309 | ||
6708bb27 | 1310 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1311 | " Node: %s%s\n", tfo->get_fabric_name(), |
1312 | pr_reg->pr_reg_nacl->initiatorname, | |
1313 | (prf_isid) ? &i_buf[0] : ""); | |
6708bb27 | 1314 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1315 | " Port(s)\n", tfo->get_fabric_name(), |
1316 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1317 | dev->transport->name); |
6708bb27 | 1318 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1319 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1320 | pr_reg->pr_res_generation); | |
1321 | ||
6708bb27 | 1322 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1323 | pr_reg->pr_reg_deve = NULL; |
1324 | pr_reg->pr_reg_nacl = NULL; | |
1325 | kfree(pr_reg->pr_aptpl_buf); | |
1326 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1327 | return; | |
1328 | } | |
1329 | /* | |
1330 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1331 | * are released once the ABORT_TASK_SET has completed.. | |
1332 | */ | |
1333 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1334 | } | |
1335 | ||
1336 | void core_scsi3_free_pr_reg_from_nacl( | |
1337 | struct se_device *dev, | |
1338 | struct se_node_acl *nacl) | |
1339 | { | |
e3d6f909 | 1340 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1341 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1342 | /* | |
1343 | * If the passed se_node_acl matches the reservation holder, | |
1344 | * release the reservation. | |
1345 | */ | |
1346 | spin_lock(&dev->dev_reservation_lock); | |
1347 | pr_res_holder = dev->dev_pr_res_holder; | |
1348 | if ((pr_res_holder != NULL) && | |
1349 | (pr_res_holder->pr_reg_nacl == nacl)) | |
1350 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); | |
1351 | spin_unlock(&dev->dev_reservation_lock); | |
1352 | /* | |
1353 | * Release any registration associated with the struct se_node_acl. | |
1354 | */ | |
1355 | spin_lock(&pr_tmpl->registration_lock); | |
1356 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1357 | &pr_tmpl->registration_list, pr_reg_list) { | |
1358 | ||
1359 | if (pr_reg->pr_reg_nacl != nacl) | |
1360 | continue; | |
1361 | ||
1362 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1363 | } | |
1364 | spin_unlock(&pr_tmpl->registration_lock); | |
1365 | } | |
1366 | ||
1367 | void core_scsi3_free_all_registrations( | |
1368 | struct se_device *dev) | |
1369 | { | |
e3d6f909 | 1370 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
1371 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1372 | ||
1373 | spin_lock(&dev->dev_reservation_lock); | |
1374 | pr_res_holder = dev->dev_pr_res_holder; | |
1375 | if (pr_res_holder != NULL) { | |
1376 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1377 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
1378 | pr_res_holder, 0); | |
1379 | } | |
1380 | spin_unlock(&dev->dev_reservation_lock); | |
1381 | ||
1382 | spin_lock(&pr_tmpl->registration_lock); | |
1383 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1384 | &pr_tmpl->registration_list, pr_reg_list) { | |
1385 | ||
1386 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1387 | } | |
1388 | spin_unlock(&pr_tmpl->registration_lock); | |
1389 | ||
1390 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1391 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1392 | pr_reg_aptpl_list) { | |
1393 | list_del(&pr_reg->pr_reg_aptpl_list); | |
1394 | kfree(pr_reg->pr_aptpl_buf); | |
1395 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1396 | } | |
1397 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1398 | } | |
1399 | ||
1400 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1401 | { | |
e3d6f909 | 1402 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1403 | &tpg->tpg_group.cg_item); |
1404 | } | |
1405 | ||
1406 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1407 | { | |
e3d6f909 | 1408 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1409 | &tpg->tpg_group.cg_item); |
1410 | ||
1411 | atomic_dec(&tpg->tpg_pr_ref_count); | |
1412 | smp_mb__after_atomic_dec(); | |
1413 | } | |
1414 | ||
1415 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1416 | { | |
1417 | struct se_portal_group *tpg = nacl->se_tpg; | |
1418 | ||
1419 | if (nacl->dynamic_node_acl) | |
1420 | return 0; | |
1421 | ||
e3d6f909 | 1422 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1423 | &nacl->acl_group.cg_item); |
1424 | } | |
1425 | ||
1426 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1427 | { | |
1428 | struct se_portal_group *tpg = nacl->se_tpg; | |
1429 | ||
1430 | if (nacl->dynamic_node_acl) { | |
1431 | atomic_dec(&nacl->acl_pr_ref_count); | |
1432 | smp_mb__after_atomic_dec(); | |
1433 | return; | |
1434 | } | |
1435 | ||
e3d6f909 | 1436 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1437 | &nacl->acl_group.cg_item); |
1438 | ||
1439 | atomic_dec(&nacl->acl_pr_ref_count); | |
1440 | smp_mb__after_atomic_dec(); | |
1441 | } | |
1442 | ||
1443 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1444 | { | |
1445 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1446 | struct se_node_acl *nacl; | |
1447 | struct se_portal_group *tpg; | |
1448 | /* | |
1449 | * For nacl->dynamic_node_acl=1 | |
1450 | */ | |
6708bb27 | 1451 | if (!lun_acl) |
c66ac9db NB |
1452 | return 0; |
1453 | ||
1454 | nacl = lun_acl->se_lun_nacl; | |
1455 | tpg = nacl->se_tpg; | |
1456 | ||
e3d6f909 | 1457 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1458 | &lun_acl->se_lun_group.cg_item); |
1459 | } | |
1460 | ||
1461 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1462 | { | |
1463 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1464 | struct se_node_acl *nacl; | |
1465 | struct se_portal_group *tpg; | |
1466 | /* | |
1467 | * For nacl->dynamic_node_acl=1 | |
1468 | */ | |
6708bb27 | 1469 | if (!lun_acl) { |
c66ac9db NB |
1470 | atomic_dec(&se_deve->pr_ref_count); |
1471 | smp_mb__after_atomic_dec(); | |
1472 | return; | |
1473 | } | |
1474 | nacl = lun_acl->se_lun_nacl; | |
1475 | tpg = nacl->se_tpg; | |
1476 | ||
e3d6f909 | 1477 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1478 | &lun_acl->se_lun_group.cg_item); |
1479 | ||
1480 | atomic_dec(&se_deve->pr_ref_count); | |
1481 | smp_mb__after_atomic_dec(); | |
1482 | } | |
1483 | ||
1484 | static int core_scsi3_decode_spec_i_port( | |
1485 | struct se_cmd *cmd, | |
1486 | struct se_portal_group *tpg, | |
1487 | unsigned char *l_isid, | |
1488 | u64 sa_res_key, | |
1489 | int all_tg_pt, | |
1490 | int aptpl) | |
1491 | { | |
5951146d | 1492 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1493 | struct se_port *tmp_port; |
1494 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1495 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
1496 | struct se_node_acl *dest_node_acl = NULL; |
1497 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1498 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1499 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1500 | LIST_HEAD(tid_dest_list); |
c66ac9db NB |
1501 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
1502 | struct target_core_fabric_ops *tmp_tf_ops; | |
05d1c7c0 | 1503 | unsigned char *buf; |
c66ac9db NB |
1504 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; |
1505 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
1506 | u32 tpdl, tid_len = 0; | |
1507 | int ret, dest_local_nexus, prf_isid; | |
1508 | u32 dest_rtpi = 0; | |
1509 | ||
1510 | memset(dest_iport, 0, 64); | |
c66ac9db | 1511 | |
f2083241 | 1512 | local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
1513 | /* |
1514 | * Allocate a struct pr_transport_id_holder and setup the | |
1515 | * local_node_acl and local_se_deve pointers and add to | |
1516 | * struct list_head tid_dest_list for add registration | |
1517 | * processing in the loop of tid_dest_list below. | |
1518 | */ | |
1519 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1520 | if (!tidh_new) { |
1521 | pr_err("Unable to allocate tidh_new\n"); | |
03e98c9e NB |
1522 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1523 | return -EINVAL; | |
c66ac9db NB |
1524 | } |
1525 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1526 | tidh_new->dest_tpg = tpg; | |
1527 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1528 | tidh_new->dest_se_deve = local_se_deve; | |
1529 | ||
5951146d | 1530 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1531 | se_sess->se_node_acl, local_se_deve, l_isid, |
1532 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1533 | if (!local_pr_reg) { |
c66ac9db | 1534 | kfree(tidh_new); |
03e98c9e NB |
1535 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1536 | return -ENOMEM; | |
c66ac9db NB |
1537 | } |
1538 | tidh_new->dest_pr_reg = local_pr_reg; | |
1539 | /* | |
1540 | * The local I_T nexus does not hold any configfs dependances, | |
1541 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1542 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1543 | */ | |
1544 | tidh_new->dest_local_nexus = 1; | |
1545 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
05d1c7c0 | 1546 | |
4949314c | 1547 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
1548 | /* |
1549 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1550 | * first extract TransportID Parameter Data Length, and make sure | |
1551 | * the value matches up to the SCSI expected data transfer length. | |
1552 | */ | |
1553 | tpdl = (buf[24] & 0xff) << 24; | |
1554 | tpdl |= (buf[25] & 0xff) << 16; | |
1555 | tpdl |= (buf[26] & 0xff) << 8; | |
1556 | tpdl |= buf[27] & 0xff; | |
1557 | ||
1558 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1559 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1560 | " does not equal CDB data_length: %u\n", tpdl, |
1561 | cmd->data_length); | |
03e98c9e NB |
1562 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1563 | ret = -EINVAL; | |
c66ac9db NB |
1564 | goto out; |
1565 | } | |
1566 | /* | |
1567 | * Start processing the received transport IDs using the | |
1568 | * receiving I_T Nexus portal's fabric dependent methods to | |
1569 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1570 | */ | |
1571 | ptr = &buf[28]; | |
1572 | ||
1573 | while (tpdl > 0) { | |
1574 | proto_ident = (ptr[0] & 0x0f); | |
1575 | dest_tpg = NULL; | |
1576 | ||
1577 | spin_lock(&dev->se_port_lock); | |
1578 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1579 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1580 | if (!tmp_tpg) |
c66ac9db | 1581 | continue; |
e3d6f909 | 1582 | tmp_tf_ops = tmp_tpg->se_tpg_tfo; |
6708bb27 | 1583 | if (!tmp_tf_ops) |
c66ac9db | 1584 | continue; |
6708bb27 AG |
1585 | if (!tmp_tf_ops->get_fabric_proto_ident || |
1586 | !tmp_tf_ops->tpg_parse_pr_out_transport_id) | |
c66ac9db NB |
1587 | continue; |
1588 | /* | |
1589 | * Look for the matching proto_ident provided by | |
1590 | * the received TransportID | |
1591 | */ | |
1592 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); | |
1593 | if (tmp_proto_ident != proto_ident) | |
1594 | continue; | |
1595 | dest_rtpi = tmp_port->sep_rtpi; | |
1596 | ||
1597 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( | |
1598 | tmp_tpg, (const char *)ptr, &tid_len, | |
1599 | &iport_ptr); | |
6708bb27 | 1600 | if (!i_str) |
c66ac9db NB |
1601 | continue; |
1602 | ||
1603 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); | |
1604 | smp_mb__after_atomic_inc(); | |
1605 | spin_unlock(&dev->se_port_lock); | |
1606 | ||
1607 | ret = core_scsi3_tpg_depend_item(tmp_tpg); | |
1608 | if (ret != 0) { | |
6708bb27 | 1609 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db NB |
1610 | " for tmp_tpg\n"); |
1611 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); | |
1612 | smp_mb__after_atomic_dec(); | |
03e98c9e NB |
1613 | cmd->scsi_sense_reason = |
1614 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1615 | ret = -EINVAL; | |
c66ac9db NB |
1616 | goto out; |
1617 | } | |
1618 | /* | |
1619 | * Locate the desination initiator ACL to be registered | |
1620 | * from the decoded fabric module specific TransportID | |
1621 | * at *i_str. | |
1622 | */ | |
28638887 | 1623 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db NB |
1624 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1625 | tmp_tpg, i_str); | |
1626 | if (dest_node_acl) { | |
1627 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
1628 | smp_mb__after_atomic_inc(); | |
1629 | } | |
28638887 | 1630 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db | 1631 | |
6708bb27 | 1632 | if (!dest_node_acl) { |
c66ac9db NB |
1633 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1634 | spin_lock(&dev->se_port_lock); | |
1635 | continue; | |
1636 | } | |
1637 | ||
1638 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
1639 | if (ret != 0) { | |
6708bb27 | 1640 | pr_err("configfs_depend_item() failed" |
c66ac9db NB |
1641 | " for dest_node_acl->acl_group\n"); |
1642 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
1643 | smp_mb__after_atomic_dec(); | |
1644 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
03e98c9e NB |
1645 | cmd->scsi_sense_reason = |
1646 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1647 | ret = -EINVAL; | |
c66ac9db NB |
1648 | goto out; |
1649 | } | |
1650 | ||
1651 | dest_tpg = tmp_tpg; | |
6708bb27 | 1652 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1653 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1654 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1655 | dest_node_acl->initiatorname, dest_rtpi); |
1656 | ||
1657 | spin_lock(&dev->se_port_lock); | |
1658 | break; | |
1659 | } | |
1660 | spin_unlock(&dev->se_port_lock); | |
1661 | ||
6708bb27 AG |
1662 | if (!dest_tpg) { |
1663 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1664 | " dest_tpg\n"); |
03e98c9e NB |
1665 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1666 | ret = -EINVAL; | |
c66ac9db NB |
1667 | goto out; |
1668 | } | |
1669 | #if 0 | |
6708bb27 | 1670 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1671 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1672 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db NB |
1673 | tpdl, tid_len, i_str, iport_ptr); |
1674 | #endif | |
1675 | if (tid_len > tpdl) { | |
6708bb27 | 1676 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1677 | " %u for Transport ID: %s\n", tid_len, ptr); |
1678 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1679 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1680 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1681 | ret = -EINVAL; | |
c66ac9db NB |
1682 | goto out; |
1683 | } | |
1684 | /* | |
1685 | * Locate the desintation struct se_dev_entry pointer for matching | |
1686 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1687 | * Target Port. | |
1688 | */ | |
1689 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1690 | dest_rtpi); | |
6708bb27 AG |
1691 | if (!dest_se_deve) { |
1692 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1693 | " from destination RTPI: %hu\n", |
e3d6f909 | 1694 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1695 | dest_rtpi); |
1696 | ||
1697 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1698 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1699 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1700 | ret = -EINVAL; | |
c66ac9db NB |
1701 | goto out; |
1702 | } | |
1703 | ||
1704 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
1705 | if (ret < 0) { | |
6708bb27 | 1706 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db NB |
1707 | " failed\n"); |
1708 | atomic_dec(&dest_se_deve->pr_ref_count); | |
1709 | smp_mb__after_atomic_dec(); | |
1710 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1711 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1712 | cmd->scsi_sense_reason = |
1713 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1714 | ret = -EINVAL; | |
c66ac9db NB |
1715 | goto out; |
1716 | } | |
1717 | #if 0 | |
6708bb27 | 1718 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1719 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1720 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1721 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
1722 | #endif | |
1723 | /* | |
1724 | * Skip any TransportIDs that already have a registration for | |
1725 | * this target port. | |
1726 | */ | |
1727 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1728 | iport_ptr); | |
1729 | if (pr_reg_e) { | |
1730 | core_scsi3_put_pr_reg(pr_reg_e); | |
1731 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1732 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1733 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1734 | ptr += tid_len; | |
1735 | tpdl -= tid_len; | |
1736 | tid_len = 0; | |
1737 | continue; | |
1738 | } | |
1739 | /* | |
1740 | * Allocate a struct pr_transport_id_holder and setup | |
1741 | * the dest_node_acl and dest_se_deve pointers for the | |
1742 | * loop below. | |
1743 | */ | |
1744 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1745 | GFP_KERNEL); | |
6708bb27 AG |
1746 | if (!tidh_new) { |
1747 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1748 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1749 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1750 | core_scsi3_tpg_undepend_item(dest_tpg); | |
03e98c9e NB |
1751 | cmd->scsi_sense_reason = |
1752 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1753 | ret = -ENOMEM; | |
c66ac9db NB |
1754 | goto out; |
1755 | } | |
1756 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1757 | tidh_new->dest_tpg = dest_tpg; | |
1758 | tidh_new->dest_node_acl = dest_node_acl; | |
1759 | tidh_new->dest_se_deve = dest_se_deve; | |
1760 | ||
1761 | /* | |
1762 | * Allocate, but do NOT add the registration for the | |
1763 | * TransportID referenced SCSI Initiator port. This | |
1764 | * done because of the following from spc4r17 in section | |
1765 | * 6.14.3 wrt SPEC_I_PT: | |
1766 | * | |
1767 | * "If a registration fails for any initiator port (e.g., if th | |
1768 | * logical unit does not have enough resources available to | |
1769 | * hold the registration information), no registrations shall be | |
1770 | * made, and the command shall be terminated with | |
1771 | * CHECK CONDITION status." | |
1772 | * | |
1773 | * That means we call __core_scsi3_alloc_registration() here, | |
1774 | * and then call __core_scsi3_add_registration() in the | |
1775 | * 2nd loop which will never fail. | |
1776 | */ | |
5951146d | 1777 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1778 | dest_node_acl, dest_se_deve, iport_ptr, |
1779 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1780 | if (!dest_pr_reg) { |
c66ac9db NB |
1781 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1782 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1783 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1784 | kfree(tidh_new); | |
03e98c9e NB |
1785 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
1786 | ret = -EINVAL; | |
c66ac9db NB |
1787 | goto out; |
1788 | } | |
1789 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1790 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1791 | ||
1792 | ptr += tid_len; | |
1793 | tpdl -= tid_len; | |
1794 | tid_len = 0; | |
1795 | ||
1796 | } | |
05d1c7c0 | 1797 | |
4949314c | 1798 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1799 | |
c66ac9db NB |
1800 | /* |
1801 | * Go ahead and create a registrations from tid_dest_list for the | |
1802 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1803 | * and dest_se_deve. | |
1804 | * | |
1805 | * The SA Reservation Key from the PROUT is set for the | |
1806 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1807 | * means that the TransportID Initiator port will be | |
1808 | * registered on all of the target ports in the SCSI target device | |
1809 | * ALL_TG_PT=0 means the registration will only be for the | |
1810 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1811 | * was received. | |
1812 | */ | |
1813 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1814 | dest_tpg = tidh->dest_tpg; | |
1815 | dest_node_acl = tidh->dest_node_acl; | |
1816 | dest_se_deve = tidh->dest_se_deve; | |
1817 | dest_pr_reg = tidh->dest_pr_reg; | |
1818 | dest_local_nexus = tidh->dest_local_nexus; | |
1819 | ||
1820 | list_del(&tidh->dest_list); | |
1821 | kfree(tidh); | |
1822 | ||
1823 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1824 | prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], | |
1825 | PR_REG_ISID_ID_LEN); | |
1826 | ||
5951146d | 1827 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1828 | dest_pr_reg, 0, 0); |
1829 | ||
6708bb27 | 1830 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1831 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1832 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1833 | dest_node_acl->initiatorname, (prf_isid) ? |
1834 | &i_buf[0] : "", dest_se_deve->mapped_lun); | |
1835 | ||
1836 | if (dest_local_nexus) | |
1837 | continue; | |
1838 | ||
1839 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1840 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1841 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1842 | } | |
1843 | ||
1844 | return 0; | |
1845 | out: | |
4949314c | 1846 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
1847 | /* |
1848 | * For the failure case, release everything from tid_dest_list | |
1849 | * including *dest_pr_reg and the configfs dependances.. | |
1850 | */ | |
1851 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1852 | dest_tpg = tidh->dest_tpg; | |
1853 | dest_node_acl = tidh->dest_node_acl; | |
1854 | dest_se_deve = tidh->dest_se_deve; | |
1855 | dest_pr_reg = tidh->dest_pr_reg; | |
1856 | dest_local_nexus = tidh->dest_local_nexus; | |
1857 | ||
1858 | list_del(&tidh->dest_list); | |
1859 | kfree(tidh); | |
1860 | /* | |
1861 | * Release any extra ALL_TG_PT=1 registrations for | |
1862 | * the SPEC_I_PT=1 case. | |
1863 | */ | |
1864 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1865 | &dest_pr_reg->pr_reg_atp_list, | |
1866 | pr_reg_atp_mem_list) { | |
1867 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1868 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1869 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1870 | } | |
1871 | ||
1872 | kfree(dest_pr_reg->pr_aptpl_buf); | |
1873 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); | |
1874 | ||
1875 | if (dest_local_nexus) | |
1876 | continue; | |
1877 | ||
1878 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1879 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1880 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1881 | } | |
1882 | return ret; | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * Called with struct se_device->dev_reservation_lock held | |
1887 | */ | |
1888 | static int __core_scsi3_update_aptpl_buf( | |
1889 | struct se_device *dev, | |
1890 | unsigned char *buf, | |
1891 | u32 pr_aptpl_buf_len, | |
1892 | int clear_aptpl_metadata) | |
1893 | { | |
1894 | struct se_lun *lun; | |
1895 | struct se_portal_group *tpg; | |
e3d6f909 | 1896 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
c66ac9db NB |
1897 | struct t10_pr_registration *pr_reg; |
1898 | unsigned char tmp[512], isid_buf[32]; | |
1899 | ssize_t len = 0; | |
1900 | int reg_count = 0; | |
1901 | ||
1902 | memset(buf, 0, pr_aptpl_buf_len); | |
1903 | /* | |
1904 | * Called to clear metadata once APTPL has been deactivated. | |
1905 | */ | |
1906 | if (clear_aptpl_metadata) { | |
1907 | snprintf(buf, pr_aptpl_buf_len, | |
1908 | "No Registrations or Reservations\n"); | |
1909 | return 0; | |
1910 | } | |
1911 | /* | |
1912 | * Walk the registration list.. | |
1913 | */ | |
e3d6f909 AG |
1914 | spin_lock(&su_dev->t10_pr.registration_lock); |
1915 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
1916 | pr_reg_list) { |
1917 | ||
1918 | tmp[0] = '\0'; | |
1919 | isid_buf[0] = '\0'; | |
1920 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1921 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1922 | /* | |
1923 | * Write out any ISID value to APTPL metadata that was included | |
1924 | * in the original registration. | |
1925 | */ | |
1926 | if (pr_reg->isid_present_at_reg) | |
1927 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1928 | pr_reg->pr_reg_isid); | |
1929 | /* | |
1930 | * Include special metadata if the pr_reg matches the | |
1931 | * reservation holder. | |
1932 | */ | |
1933 | if (dev->dev_pr_res_holder == pr_reg) { | |
1934 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1935 | "\ninitiator_fabric=%s\n" | |
1936 | "initiator_node=%s\n%s" | |
1937 | "sa_res_key=%llu\n" | |
1938 | "res_holder=1\nres_type=%02x\n" | |
1939 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1940 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1941 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1942 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1943 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1944 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1945 | pr_reg->pr_res_mapped_lun); | |
1946 | } else { | |
1947 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1948 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1949 | "sa_res_key=%llu\nres_holder=0\n" | |
1950 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1951 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1952 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1953 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1954 | pr_reg->pr_res_mapped_lun); | |
1955 | } | |
1956 | ||
60d645a4 | 1957 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1958 | pr_err("Unable to update renaming" |
c66ac9db | 1959 | " APTPL metadata\n"); |
e3d6f909 AG |
1960 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1961 | return -EMSGSIZE; | |
c66ac9db NB |
1962 | } |
1963 | len += sprintf(buf+len, "%s", tmp); | |
1964 | ||
1965 | /* | |
1966 | * Include information about the associated SCSI target port. | |
1967 | */ | |
1968 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1969 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1970 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1971 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1972 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1973 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
1974 | ||
60d645a4 | 1975 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1976 | pr_err("Unable to update renaming" |
c66ac9db | 1977 | " APTPL metadata\n"); |
e3d6f909 AG |
1978 | spin_unlock(&su_dev->t10_pr.registration_lock); |
1979 | return -EMSGSIZE; | |
c66ac9db NB |
1980 | } |
1981 | len += sprintf(buf+len, "%s", tmp); | |
1982 | reg_count++; | |
1983 | } | |
e3d6f909 | 1984 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db | 1985 | |
6708bb27 | 1986 | if (!reg_count) |
c66ac9db NB |
1987 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1988 | ||
1989 | return 0; | |
1990 | } | |
1991 | ||
1992 | static int core_scsi3_update_aptpl_buf( | |
1993 | struct se_device *dev, | |
1994 | unsigned char *buf, | |
1995 | u32 pr_aptpl_buf_len, | |
1996 | int clear_aptpl_metadata) | |
1997 | { | |
1998 | int ret; | |
1999 | ||
2000 | spin_lock(&dev->dev_reservation_lock); | |
2001 | ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2002 | clear_aptpl_metadata); | |
2003 | spin_unlock(&dev->dev_reservation_lock); | |
2004 | ||
2005 | return ret; | |
2006 | } | |
2007 | ||
2008 | /* | |
2009 | * Called with struct se_device->aptpl_file_mutex held | |
2010 | */ | |
2011 | static int __core_scsi3_write_aptpl_to_file( | |
2012 | struct se_device *dev, | |
2013 | unsigned char *buf, | |
2014 | u32 pr_aptpl_buf_len) | |
2015 | { | |
e3d6f909 | 2016 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
2017 | struct file *file; |
2018 | struct iovec iov[1]; | |
2019 | mm_segment_t old_fs; | |
2020 | int flags = O_RDWR | O_CREAT | O_TRUNC; | |
2021 | char path[512]; | |
2022 | int ret; | |
2023 | ||
2024 | memset(iov, 0, sizeof(struct iovec)); | |
2025 | memset(path, 0, 512); | |
2026 | ||
60d645a4 | 2027 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 2028 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 2029 | " into path buffer\n"); |
e3d6f909 | 2030 | return -EMSGSIZE; |
c66ac9db NB |
2031 | } |
2032 | ||
2033 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
2034 | file = filp_open(path, flags, 0600); | |
2035 | if (IS_ERR(file) || !file || !file->f_dentry) { | |
6708bb27 | 2036 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 2037 | " failed\n", path); |
e3d6f909 | 2038 | return (PTR_ERR(file) < 0 ? PTR_ERR(file) : -ENOENT); |
c66ac9db NB |
2039 | } |
2040 | ||
2041 | iov[0].iov_base = &buf[0]; | |
6708bb27 | 2042 | if (!pr_aptpl_buf_len) |
c66ac9db NB |
2043 | iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ |
2044 | else | |
2045 | iov[0].iov_len = pr_aptpl_buf_len; | |
2046 | ||
2047 | old_fs = get_fs(); | |
2048 | set_fs(get_ds()); | |
2049 | ret = vfs_writev(file, &iov[0], 1, &file->f_pos); | |
2050 | set_fs(old_fs); | |
2051 | ||
2052 | if (ret < 0) { | |
6708bb27 | 2053 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
c66ac9db | 2054 | filp_close(file, NULL); |
e3d6f909 | 2055 | return -EIO; |
c66ac9db NB |
2056 | } |
2057 | filp_close(file, NULL); | |
2058 | ||
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | static int core_scsi3_update_and_write_aptpl( | |
2063 | struct se_device *dev, | |
2064 | unsigned char *in_buf, | |
2065 | u32 in_pr_aptpl_buf_len) | |
2066 | { | |
2067 | unsigned char null_buf[64], *buf; | |
2068 | u32 pr_aptpl_buf_len; | |
2069 | int ret, clear_aptpl_metadata = 0; | |
2070 | /* | |
2071 | * Can be called with a NULL pointer from PROUT service action CLEAR | |
2072 | */ | |
6708bb27 | 2073 | if (!in_buf) { |
c66ac9db NB |
2074 | memset(null_buf, 0, 64); |
2075 | buf = &null_buf[0]; | |
2076 | /* | |
2077 | * This will clear the APTPL metadata to: | |
2078 | * "No Registrations or Reservations" status | |
2079 | */ | |
2080 | pr_aptpl_buf_len = 64; | |
2081 | clear_aptpl_metadata = 1; | |
2082 | } else { | |
2083 | buf = in_buf; | |
2084 | pr_aptpl_buf_len = in_pr_aptpl_buf_len; | |
2085 | } | |
2086 | ||
2087 | ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2088 | clear_aptpl_metadata); | |
2089 | if (ret != 0) | |
e3d6f909 | 2090 | return ret; |
c66ac9db NB |
2091 | /* |
2092 | * __core_scsi3_write_aptpl_to_file() will call strlen() | |
2093 | * on the passed buf to determine pr_aptpl_buf_len. | |
2094 | */ | |
2095 | ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); | |
2096 | if (ret != 0) | |
e3d6f909 | 2097 | return ret; |
c66ac9db NB |
2098 | |
2099 | return ret; | |
2100 | } | |
2101 | ||
2102 | static int core_scsi3_emulate_pro_register( | |
2103 | struct se_cmd *cmd, | |
2104 | u64 res_key, | |
2105 | u64 sa_res_key, | |
2106 | int aptpl, | |
2107 | int all_tg_pt, | |
2108 | int spec_i_pt, | |
2109 | int ignore_key) | |
2110 | { | |
e3d6f909 | 2111 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2112 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2113 | struct se_dev_entry *se_deve; |
e3d6f909 | 2114 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
2115 | struct se_portal_group *se_tpg; |
2116 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; | |
e3d6f909 | 2117 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2118 | /* Used for APTPL metadata w/ UNREGISTER */ |
2119 | unsigned char *pr_aptpl_buf = NULL; | |
2120 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
2121 | int pr_holder = 0, ret = 0, type; | |
2122 | ||
6708bb27 AG |
2123 | if (!se_sess || !se_lun) { |
2124 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2125 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2126 | return -EINVAL; | |
c66ac9db NB |
2127 | } |
2128 | se_tpg = se_sess->se_tpg; | |
f2083241 | 2129 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db | 2130 | |
e3d6f909 | 2131 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2132 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2133 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2134 | PR_REG_ISID_LEN); |
2135 | isid_ptr = &isid_buf[0]; | |
2136 | } | |
2137 | /* | |
2138 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2139 | */ | |
2140 | pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 | 2141 | if (!pr_reg_e) { |
c66ac9db | 2142 | if (res_key) { |
6708bb27 | 2143 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2144 | " for SA REGISTER, returning CONFLICT\n"); |
03e98c9e NB |
2145 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2146 | return -EINVAL; | |
c66ac9db NB |
2147 | } |
2148 | /* | |
2149 | * Do nothing but return GOOD status. | |
2150 | */ | |
6708bb27 | 2151 | if (!sa_res_key) |
03e98c9e | 2152 | return 0; |
c66ac9db | 2153 | |
6708bb27 | 2154 | if (!spec_i_pt) { |
c66ac9db NB |
2155 | /* |
2156 | * Perform the Service Action REGISTER on the Initiator | |
2157 | * Port Endpoint that the PRO was received from on the | |
2158 | * Logical Unit of the SCSI device server. | |
2159 | */ | |
5951146d | 2160 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
2161 | se_sess->se_node_acl, se_deve, isid_ptr, |
2162 | sa_res_key, all_tg_pt, aptpl, | |
2163 | ignore_key, 0); | |
2164 | if (ret != 0) { | |
6708bb27 | 2165 | pr_err("Unable to allocate" |
c66ac9db | 2166 | " struct t10_pr_registration\n"); |
03e98c9e NB |
2167 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2168 | return -EINVAL; | |
c66ac9db NB |
2169 | } |
2170 | } else { | |
2171 | /* | |
2172 | * Register both the Initiator port that received | |
2173 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2174 | * TransportID from Parameter list and loop through | |
2175 | * fabric dependent parameter list while calling | |
2176 | * logic from of core_scsi3_alloc_registration() for | |
2177 | * each TransportID provided SCSI Initiator Port/Device | |
2178 | */ | |
2179 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2180 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2181 | if (ret != 0) | |
2182 | return ret; | |
2183 | } | |
2184 | /* | |
2185 | * Nothing left to do for the APTPL=0 case. | |
2186 | */ | |
6708bb27 | 2187 | if (!aptpl) { |
c66ac9db | 2188 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 2189 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2190 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
2191 | " REGISTER\n"); |
2192 | return 0; | |
2193 | } | |
2194 | /* | |
2195 | * Locate the newly allocated local I_T Nexus *pr_reg, and | |
2196 | * update the APTPL metadata information using its | |
2197 | * preallocated *pr_reg->pr_aptpl_buf. | |
2198 | */ | |
5951146d | 2199 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db NB |
2200 | se_sess->se_node_acl, se_sess); |
2201 | ||
5951146d | 2202 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2203 | &pr_reg->pr_aptpl_buf[0], |
2204 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2205 | if (!ret) { |
c66ac9db | 2206 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2207 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); |
c66ac9db NB |
2208 | } |
2209 | ||
2210 | core_scsi3_put_pr_reg(pr_reg); | |
2211 | return ret; | |
2212 | } else { | |
2213 | /* | |
2214 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2215 | */ | |
2216 | pr_reg = pr_reg_e; | |
2217 | type = pr_reg->pr_res_type; | |
2218 | ||
6708bb27 | 2219 | if (!ignore_key) { |
c66ac9db | 2220 | if (res_key != pr_reg->pr_res_key) { |
6708bb27 | 2221 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2222 | " res_key: 0x%016Lx does not match" |
2223 | " existing SA REGISTER res_key:" | |
2224 | " 0x%016Lx\n", res_key, | |
2225 | pr_reg->pr_res_key); | |
2226 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2227 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2228 | return -EINVAL; | |
c66ac9db NB |
2229 | } |
2230 | } | |
2231 | if (spec_i_pt) { | |
6708bb27 | 2232 | pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" |
c66ac9db NB |
2233 | " set while sa_res_key=0\n"); |
2234 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2235 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2236 | return -EINVAL; | |
c66ac9db NB |
2237 | } |
2238 | /* | |
2239 | * An existing ALL_TG_PT=1 registration being released | |
2240 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2241 | */ | |
2242 | if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { | |
6708bb27 | 2243 | pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" |
c66ac9db NB |
2244 | " registration exists, but ALL_TG_PT=1 bit not" |
2245 | " present in received PROUT\n"); | |
2246 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2247 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2248 | return -EINVAL; | |
c66ac9db NB |
2249 | } |
2250 | /* | |
2251 | * Allocate APTPL metadata buffer used for UNREGISTER ops | |
2252 | */ | |
2253 | if (aptpl) { | |
2254 | pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, | |
2255 | GFP_KERNEL); | |
6708bb27 AG |
2256 | if (!pr_aptpl_buf) { |
2257 | pr_err("Unable to allocate" | |
c66ac9db NB |
2258 | " pr_aptpl_buf\n"); |
2259 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2260 | cmd->scsi_sense_reason = |
2261 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2262 | return -EINVAL; | |
c66ac9db NB |
2263 | } |
2264 | } | |
2265 | /* | |
2266 | * sa_res_key=0 Unregister Reservation Key for registered I_T | |
2267 | * Nexus sa_res_key=1 Change Reservation Key for registered I_T | |
2268 | * Nexus. | |
2269 | */ | |
6708bb27 | 2270 | if (!sa_res_key) { |
c66ac9db | 2271 | pr_holder = core_scsi3_check_implict_release( |
5951146d | 2272 | cmd->se_dev, pr_reg); |
c66ac9db NB |
2273 | if (pr_holder < 0) { |
2274 | kfree(pr_aptpl_buf); | |
2275 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2276 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2277 | return -EINVAL; | |
c66ac9db NB |
2278 | } |
2279 | ||
2280 | spin_lock(&pr_tmpl->registration_lock); | |
2281 | /* | |
2282 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port | |
2283 | * and matching pr_res_key. | |
2284 | */ | |
2285 | if (pr_reg->pr_reg_all_tg_pt) { | |
2286 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2287 | &pr_tmpl->registration_list, | |
2288 | pr_reg_list) { | |
2289 | ||
6708bb27 | 2290 | if (!pr_reg_p->pr_reg_all_tg_pt) |
c66ac9db NB |
2291 | continue; |
2292 | ||
2293 | if (pr_reg_p->pr_res_key != res_key) | |
2294 | continue; | |
2295 | ||
2296 | if (pr_reg == pr_reg_p) | |
2297 | continue; | |
2298 | ||
2299 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2300 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2301 | continue; | |
2302 | ||
2303 | __core_scsi3_free_registration(dev, | |
2304 | pr_reg_p, NULL, 0); | |
2305 | } | |
2306 | } | |
2307 | /* | |
2308 | * Release the calling I_T Nexus registration now.. | |
2309 | */ | |
5951146d | 2310 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, |
c66ac9db NB |
2311 | NULL, 1); |
2312 | /* | |
2313 | * From spc4r17, section 5.7.11.3 Unregistering | |
2314 | * | |
2315 | * If the persistent reservation is a registrants only | |
2316 | * type, the device server shall establish a unit | |
2317 | * attention condition for the initiator port associated | |
2318 | * with every registered I_T nexus except for the I_T | |
2319 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2320 | * received, with the additional sense code set to | |
2321 | * RESERVATIONS RELEASED. | |
2322 | */ | |
2323 | if (pr_holder && | |
2324 | ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
2325 | (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { | |
2326 | list_for_each_entry(pr_reg_p, | |
2327 | &pr_tmpl->registration_list, | |
2328 | pr_reg_list) { | |
2329 | ||
2330 | core_scsi3_ua_allocate( | |
2331 | pr_reg_p->pr_reg_nacl, | |
2332 | pr_reg_p->pr_res_mapped_lun, | |
2333 | 0x2A, | |
2334 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
2335 | } | |
2336 | } | |
2337 | spin_unlock(&pr_tmpl->registration_lock); | |
2338 | ||
6708bb27 | 2339 | if (!aptpl) { |
c66ac9db NB |
2340 | pr_tmpl->pr_aptpl_active = 0; |
2341 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
6708bb27 | 2342 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2343 | " for UNREGISTER\n"); |
2344 | return 0; | |
2345 | } | |
2346 | ||
2347 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2348 | &pr_aptpl_buf[0], | |
2349 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2350 | if (!ret) { |
c66ac9db | 2351 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2352 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2353 | " for UNREGISTER\n"); |
2354 | } | |
2355 | ||
2356 | kfree(pr_aptpl_buf); | |
2357 | return ret; | |
2358 | } else { | |
2359 | /* | |
2360 | * Increment PRgeneration counter for struct se_device" | |
2361 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2362 | * READ_KEYS service action. | |
2363 | */ | |
2364 | pr_reg->pr_res_generation = core_scsi3_pr_generation( | |
5951146d | 2365 | cmd->se_dev); |
c66ac9db | 2366 | pr_reg->pr_res_key = sa_res_key; |
6708bb27 | 2367 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" |
c66ac9db | 2368 | " Key for %s to: 0x%016Lx PRgeneration:" |
e3d6f909 | 2369 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2370 | (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", |
2371 | pr_reg->pr_reg_nacl->initiatorname, | |
2372 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2373 | ||
6708bb27 | 2374 | if (!aptpl) { |
c66ac9db NB |
2375 | pr_tmpl->pr_aptpl_active = 0; |
2376 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2377 | core_scsi3_put_pr_reg(pr_reg); | |
6708bb27 | 2378 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" |
c66ac9db NB |
2379 | " for REGISTER\n"); |
2380 | return 0; | |
2381 | } | |
2382 | ||
2383 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2384 | &pr_aptpl_buf[0], | |
2385 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 | 2386 | if (!ret) { |
c66ac9db | 2387 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2388 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" |
c66ac9db NB |
2389 | " for REGISTER\n"); |
2390 | } | |
2391 | ||
2392 | kfree(pr_aptpl_buf); | |
2393 | core_scsi3_put_pr_reg(pr_reg); | |
2394 | } | |
2395 | } | |
2396 | return 0; | |
2397 | } | |
2398 | ||
2399 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2400 | { | |
2401 | switch (type) { | |
2402 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2403 | return "Write Exclusive Access"; | |
2404 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2405 | return "Exclusive Access"; | |
2406 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2407 | return "Write Exclusive Access, Registrants Only"; | |
2408 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2409 | return "Exclusive Access, Registrants Only"; | |
2410 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2411 | return "Write Exclusive Access, All Registrants"; | |
2412 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2413 | return "Exclusive Access, All Registrants"; | |
2414 | default: | |
2415 | break; | |
2416 | } | |
2417 | ||
2418 | return "Unknown SPC-3 PR Type"; | |
2419 | } | |
2420 | ||
2421 | static int core_scsi3_pro_reserve( | |
2422 | struct se_cmd *cmd, | |
2423 | struct se_device *dev, | |
2424 | int type, | |
2425 | int scope, | |
2426 | u64 res_key) | |
2427 | { | |
e3d6f909 | 2428 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2429 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2430 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
e3d6f909 | 2431 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2432 | char i_buf[PR_REG_ISID_ID_LEN]; |
2433 | int ret, prf_isid; | |
2434 | ||
2435 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2436 | ||
6708bb27 AG |
2437 | if (!se_sess || !se_lun) { |
2438 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2439 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2440 | return -EINVAL; | |
c66ac9db | 2441 | } |
c66ac9db NB |
2442 | /* |
2443 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2444 | */ | |
5951146d | 2445 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2446 | se_sess); |
6708bb27 AG |
2447 | if (!pr_reg) { |
2448 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2449 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
03e98c9e NB |
2450 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2451 | return -EINVAL; | |
c66ac9db NB |
2452 | } |
2453 | /* | |
2454 | * From spc4r17 Section 5.7.9: Reserving: | |
2455 | * | |
2456 | * An application client creates a persistent reservation by issuing | |
2457 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2458 | * a registered I_T nexus with the following parameters: | |
2459 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2460 | * registered with the logical unit for the I_T nexus; and | |
2461 | */ | |
2462 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2463 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2464 | " does not match existing SA REGISTER res_key:" |
2465 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2466 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2467 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2468 | return -EINVAL; | |
c66ac9db NB |
2469 | } |
2470 | /* | |
2471 | * From spc4r17 Section 5.7.9: Reserving: | |
2472 | * | |
2473 | * From above: | |
2474 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2475 | * being created. | |
2476 | * | |
2477 | * Only one persistent reservation is allowed at a time per logical unit | |
2478 | * and that persistent reservation has a scope of LU_SCOPE. | |
2479 | */ | |
2480 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2481 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2482 | core_scsi3_put_pr_reg(pr_reg); |
03e98c9e NB |
2483 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
2484 | return -EINVAL; | |
c66ac9db NB |
2485 | } |
2486 | /* | |
2487 | * See if we have an existing PR reservation holder pointer at | |
2488 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2489 | * *pr_res_holder. | |
2490 | */ | |
2491 | spin_lock(&dev->dev_reservation_lock); | |
2492 | pr_res_holder = dev->dev_pr_res_holder; | |
2493 | if ((pr_res_holder)) { | |
2494 | /* | |
2495 | * From spc4r17 Section 5.7.9: Reserving: | |
2496 | * | |
2497 | * If the device server receives a PERSISTENT RESERVE OUT | |
2498 | * command from an I_T nexus other than a persistent reservation | |
2499 | * holder (see 5.7.10) that attempts to create a persistent | |
2500 | * reservation when a persistent reservation already exists for | |
2501 | * the logical unit, then the command shall be completed with | |
2502 | * RESERVATION CONFLICT status. | |
2503 | */ | |
2504 | if (pr_res_holder != pr_reg) { | |
2505 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2506 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2507 | " [%s]: %s while reservation already held by" |
2508 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2509 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2510 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2511 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2512 | pr_res_holder->pr_reg_nacl->initiatorname); |
2513 | ||
2514 | spin_unlock(&dev->dev_reservation_lock); | |
2515 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2516 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2517 | return -EINVAL; | |
c66ac9db NB |
2518 | } |
2519 | /* | |
2520 | * From spc4r17 Section 5.7.9: Reserving: | |
2521 | * | |
2522 | * If a persistent reservation holder attempts to modify the | |
2523 | * type or scope of an existing persistent reservation, the | |
2524 | * command shall be completed with RESERVATION CONFLICT status. | |
2525 | */ | |
2526 | if ((pr_res_holder->pr_res_type != type) || | |
2527 | (pr_res_holder->pr_res_scope != scope)) { | |
2528 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2529 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2530 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2531 | " while reservation already held by [%s]: %s," | |
2532 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2533 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2534 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2535 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2536 | pr_res_holder->pr_reg_nacl->initiatorname); |
2537 | ||
2538 | spin_unlock(&dev->dev_reservation_lock); | |
2539 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2540 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2541 | return -EINVAL; | |
c66ac9db NB |
2542 | } |
2543 | /* | |
2544 | * From spc4r17 Section 5.7.9: Reserving: | |
2545 | * | |
2546 | * If the device server receives a PERSISTENT RESERVE OUT | |
2547 | * command with RESERVE service action where the TYPE field and | |
2548 | * the SCOPE field contain the same values as the existing type | |
2549 | * and scope from a persistent reservation holder, it shall not | |
2550 | * make any change to the existing persistent reservation and | |
2551 | * shall completethe command with GOOD status. | |
2552 | */ | |
2553 | spin_unlock(&dev->dev_reservation_lock); | |
2554 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2555 | return 0; |
c66ac9db NB |
2556 | } |
2557 | /* | |
2558 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2559 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2560 | */ | |
2561 | pr_reg->pr_res_scope = scope; | |
2562 | pr_reg->pr_res_type = type; | |
2563 | pr_reg->pr_res_holder = 1; | |
2564 | dev->dev_pr_res_holder = pr_reg; | |
2565 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2566 | PR_REG_ISID_ID_LEN); | |
2567 | ||
6708bb27 | 2568 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2569 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2570 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2571 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2572 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2573 | cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2574 | se_sess->se_node_acl->initiatorname, |
2575 | (prf_isid) ? &i_buf[0] : ""); | |
2576 | spin_unlock(&dev->dev_reservation_lock); | |
2577 | ||
2578 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2579 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2580 | &pr_reg->pr_aptpl_buf[0], |
2581 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2582 | if (!ret) |
2583 | pr_debug("SPC-3 PR: Updated APTPL metadata" | |
c66ac9db NB |
2584 | " for RESERVE\n"); |
2585 | } | |
2586 | ||
2587 | core_scsi3_put_pr_reg(pr_reg); | |
2588 | return 0; | |
2589 | } | |
2590 | ||
2591 | static int core_scsi3_emulate_pro_reserve( | |
2592 | struct se_cmd *cmd, | |
2593 | int type, | |
2594 | int scope, | |
2595 | u64 res_key) | |
2596 | { | |
2597 | struct se_device *dev = cmd->se_dev; | |
2598 | int ret = 0; | |
2599 | ||
2600 | switch (type) { | |
2601 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2602 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2603 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2604 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2605 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2606 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2607 | ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); | |
2608 | break; | |
2609 | default: | |
6708bb27 | 2610 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2611 | " 0x%02x\n", type); |
03e98c9e NB |
2612 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
2613 | return -EINVAL; | |
c66ac9db NB |
2614 | } |
2615 | ||
2616 | return ret; | |
2617 | } | |
2618 | ||
2619 | /* | |
2620 | * Called with struct se_device->dev_reservation_lock held. | |
2621 | */ | |
2622 | static void __core_scsi3_complete_pro_release( | |
2623 | struct se_device *dev, | |
2624 | struct se_node_acl *se_nacl, | |
2625 | struct t10_pr_registration *pr_reg, | |
2626 | int explict) | |
2627 | { | |
2628 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; | |
2629 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2630 | int prf_isid; | |
2631 | ||
2632 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2633 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2634 | PR_REG_ISID_ID_LEN); | |
2635 | /* | |
2636 | * Go ahead and release the current PR reservation holder. | |
2637 | */ | |
2638 | dev->dev_pr_res_holder = NULL; | |
2639 | ||
6708bb27 | 2640 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" |
c66ac9db NB |
2641 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2642 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", | |
2643 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
2644 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2645 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db NB |
2646 | tfo->get_fabric_name(), se_nacl->initiatorname, |
2647 | (prf_isid) ? &i_buf[0] : ""); | |
2648 | /* | |
2649 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2650 | */ | |
2651 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2652 | } | |
2653 | ||
2654 | static int core_scsi3_emulate_pro_release( | |
2655 | struct se_cmd *cmd, | |
2656 | int type, | |
2657 | int scope, | |
2658 | u64 res_key) | |
2659 | { | |
2660 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2661 | struct se_session *se_sess = cmd->se_sess; |
2662 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2663 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
e3d6f909 | 2664 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
2665 | int ret, all_reg = 0; |
2666 | ||
6708bb27 AG |
2667 | if (!se_sess || !se_lun) { |
2668 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
2669 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2670 | return -EINVAL; | |
c66ac9db NB |
2671 | } |
2672 | /* | |
2673 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2674 | */ | |
2675 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2676 | if (!pr_reg) { |
2677 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2678 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
03e98c9e NB |
2679 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2680 | return -EINVAL; | |
c66ac9db NB |
2681 | } |
2682 | /* | |
2683 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2684 | * | |
2685 | * If there is no persistent reservation or in response to a persistent | |
2686 | * reservation release request from a registered I_T nexus that is not a | |
2687 | * persistent reservation holder (see 5.7.10), the device server shall | |
2688 | * do the following: | |
2689 | * | |
2690 | * a) Not release the persistent reservation, if any; | |
2691 | * b) Not remove any registrations; and | |
2692 | * c) Complete the command with GOOD status. | |
2693 | */ | |
2694 | spin_lock(&dev->dev_reservation_lock); | |
2695 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2696 | if (!pr_res_holder) { |
c66ac9db NB |
2697 | /* |
2698 | * No persistent reservation, return GOOD status. | |
2699 | */ | |
2700 | spin_unlock(&dev->dev_reservation_lock); | |
2701 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2702 | return 0; |
c66ac9db NB |
2703 | } |
2704 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2705 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
2706 | all_reg = 1; | |
2707 | ||
2708 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { | |
2709 | /* | |
2710 | * Non 'All Registrants' PR Type cases.. | |
2711 | * Release request from a registered I_T nexus that is not a | |
2712 | * persistent reservation holder. return GOOD status. | |
2713 | */ | |
2714 | spin_unlock(&dev->dev_reservation_lock); | |
2715 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e | 2716 | return 0; |
c66ac9db NB |
2717 | } |
2718 | /* | |
2719 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2720 | * | |
2721 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2722 | * release a persistent reservation. | |
2723 | * | |
2724 | * An application client releases the persistent reservation by issuing | |
2725 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2726 | * an I_T nexus that is a persistent reservation holder with the | |
2727 | * following parameters: | |
2728 | * | |
2729 | * a) RESERVATION KEY field set to the value of the reservation key | |
2730 | * that is registered with the logical unit for the I_T nexus; | |
2731 | */ | |
2732 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2733 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2734 | " does not match existing SA REGISTER res_key:" |
2735 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2736 | spin_unlock(&dev->dev_reservation_lock); | |
2737 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2738 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2739 | return -EINVAL; | |
c66ac9db NB |
2740 | } |
2741 | /* | |
2742 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2743 | * | |
2744 | * b) TYPE field and SCOPE field set to match the persistent | |
2745 | * reservation being released. | |
2746 | */ | |
2747 | if ((pr_res_holder->pr_res_type != type) || | |
2748 | (pr_res_holder->pr_res_scope != scope)) { | |
2749 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2750 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2751 | " reservation from [%s]: %s with different TYPE " |
2752 | "and/or SCOPE while reservation already held by" | |
2753 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2754 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2755 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2756 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2757 | pr_res_holder->pr_reg_nacl->initiatorname); |
2758 | ||
2759 | spin_unlock(&dev->dev_reservation_lock); | |
2760 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
2761 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2762 | return -EINVAL; | |
c66ac9db NB |
2763 | } |
2764 | /* | |
2765 | * In response to a persistent reservation release request from the | |
2766 | * persistent reservation holder the device server shall perform a | |
2767 | * release by doing the following as an uninterrupted series of actions: | |
2768 | * a) Release the persistent reservation; | |
2769 | * b) Not remove any registration(s); | |
2770 | * c) If the released persistent reservation is a registrants only type | |
2771 | * or all registrants type persistent reservation, | |
2772 | * the device server shall establish a unit attention condition for | |
2773 | * the initiator port associated with every regis- | |
2774 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2775 | * RESERVE OUT command with RELEASE service action was received, | |
2776 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2777 | * d) If the persistent reservation is of any other type, the device | |
2778 | * server shall not establish a unit attention condition. | |
2779 | */ | |
2780 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
2781 | pr_reg, 1); | |
2782 | ||
2783 | spin_unlock(&dev->dev_reservation_lock); | |
2784 | ||
2785 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2786 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2787 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2788 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2789 | /* | |
2790 | * If no UNIT ATTENTION conditions will be established for | |
2791 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2792 | * go ahead and check for APTPL=1 update+write below | |
2793 | */ | |
2794 | goto write_aptpl; | |
2795 | } | |
2796 | ||
2797 | spin_lock(&pr_tmpl->registration_lock); | |
2798 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2799 | pr_reg_list) { | |
2800 | /* | |
2801 | * Do not establish a UNIT ATTENTION condition | |
2802 | * for the calling I_T Nexus | |
2803 | */ | |
2804 | if (pr_reg_p == pr_reg) | |
2805 | continue; | |
2806 | ||
2807 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2808 | pr_reg_p->pr_res_mapped_lun, | |
2809 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2810 | } | |
2811 | spin_unlock(&pr_tmpl->registration_lock); | |
2812 | ||
2813 | write_aptpl: | |
2814 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2815 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
2816 | &pr_reg->pr_aptpl_buf[0], |
2817 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
2818 | if (!ret) |
2819 | pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); | |
c66ac9db NB |
2820 | } |
2821 | ||
2822 | core_scsi3_put_pr_reg(pr_reg); | |
2823 | return 0; | |
2824 | } | |
2825 | ||
2826 | static int core_scsi3_emulate_pro_clear( | |
2827 | struct se_cmd *cmd, | |
2828 | u64 res_key) | |
2829 | { | |
2830 | struct se_device *dev = cmd->se_dev; | |
2831 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 AG |
2832 | struct se_session *se_sess = cmd->se_sess; |
2833 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; | |
c66ac9db NB |
2834 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2835 | u32 pr_res_mapped_lun = 0; | |
2836 | int calling_it_nexus = 0; | |
2837 | /* | |
2838 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2839 | */ | |
5951146d | 2840 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2841 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2842 | if (!pr_reg_n) { |
2843 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2844 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
03e98c9e NB |
2845 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2846 | return -EINVAL; | |
c66ac9db NB |
2847 | } |
2848 | /* | |
2849 | * From spc4r17 section 5.7.11.6, Clearing: | |
2850 | * | |
2851 | * Any application client may release the persistent reservation and | |
2852 | * remove all registrations from a device server by issuing a | |
2853 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2854 | * registered I_T nexus with the following parameter: | |
2855 | * | |
2856 | * a) RESERVATION KEY field set to the value of the reservation key | |
2857 | * that is registered with the logical unit for the I_T nexus. | |
2858 | */ | |
2859 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2860 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2861 | " res_key: 0x%016Lx does not match" |
2862 | " existing SA REGISTER res_key:" | |
2863 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2864 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
2865 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2866 | return -EINVAL; | |
c66ac9db NB |
2867 | } |
2868 | /* | |
2869 | * a) Release the persistent reservation, if any; | |
2870 | */ | |
2871 | spin_lock(&dev->dev_reservation_lock); | |
2872 | pr_res_holder = dev->dev_pr_res_holder; | |
2873 | if (pr_res_holder) { | |
2874 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2875 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
2876 | pr_res_holder, 0); | |
2877 | } | |
2878 | spin_unlock(&dev->dev_reservation_lock); | |
2879 | /* | |
2880 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2881 | */ | |
2882 | spin_lock(&pr_tmpl->registration_lock); | |
2883 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2884 | &pr_tmpl->registration_list, pr_reg_list) { | |
2885 | ||
2886 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2887 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2888 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2889 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2890 | calling_it_nexus); | |
2891 | /* | |
2892 | * e) Establish a unit attention condition for the initiator | |
2893 | * port associated with every registered I_T nexus other | |
2894 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2895 | * command with CLEAR service action was received, with the | |
2896 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2897 | */ | |
6708bb27 | 2898 | if (!calling_it_nexus) |
c66ac9db NB |
2899 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2900 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2901 | } | |
2902 | spin_unlock(&pr_tmpl->registration_lock); | |
2903 | ||
6708bb27 | 2904 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2905 | cmd->se_tfo->get_fabric_name()); |
c66ac9db NB |
2906 | |
2907 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2908 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2909 | pr_debug("SPC-3 PR: Updated APTPL metadata" |
c66ac9db NB |
2910 | " for CLEAR\n"); |
2911 | } | |
2912 | ||
2913 | core_scsi3_pr_generation(dev); | |
2914 | return 0; | |
2915 | } | |
2916 | ||
2917 | /* | |
2918 | * Called with struct se_device->dev_reservation_lock held. | |
2919 | */ | |
2920 | static void __core_scsi3_complete_pro_preempt( | |
2921 | struct se_device *dev, | |
2922 | struct t10_pr_registration *pr_reg, | |
2923 | struct list_head *preempt_and_abort_list, | |
2924 | int type, | |
2925 | int scope, | |
2926 | int abort) | |
2927 | { | |
2928 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
2929 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
2930 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2931 | int prf_isid; | |
2932 | ||
2933 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2934 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2935 | PR_REG_ISID_ID_LEN); | |
2936 | /* | |
2937 | * Do an implict RELEASE of the existing reservation. | |
2938 | */ | |
2939 | if (dev->dev_pr_res_holder) | |
2940 | __core_scsi3_complete_pro_release(dev, nacl, | |
2941 | dev->dev_pr_res_holder, 0); | |
2942 | ||
2943 | dev->dev_pr_res_holder = pr_reg; | |
2944 | pr_reg->pr_res_holder = 1; | |
2945 | pr_reg->pr_res_type = type; | |
2946 | pr_reg->pr_res_scope = scope; | |
2947 | ||
6708bb27 | 2948 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db NB |
2949 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2950 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2951 | core_scsi3_pr_dump_type(type), | |
2952 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2953 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
c66ac9db NB |
2954 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", |
2955 | nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); | |
2956 | /* | |
2957 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2958 | * struct t10_pr_registration to the list that will be compared | |
2959 | * against received CDBs.. | |
2960 | */ | |
2961 | if (preempt_and_abort_list) | |
2962 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2963 | preempt_and_abort_list); | |
2964 | } | |
2965 | ||
2966 | static void core_scsi3_release_preempt_and_abort( | |
2967 | struct list_head *preempt_and_abort_list, | |
2968 | struct t10_pr_registration *pr_reg_holder) | |
2969 | { | |
2970 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2971 | ||
2972 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2973 | pr_reg_abort_list) { | |
2974 | ||
2975 | list_del(&pr_reg->pr_reg_abort_list); | |
2976 | if (pr_reg_holder == pr_reg) | |
2977 | continue; | |
2978 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2979 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2980 | continue; |
2981 | } | |
2982 | ||
2983 | pr_reg->pr_reg_deve = NULL; | |
2984 | pr_reg->pr_reg_nacl = NULL; | |
2985 | kfree(pr_reg->pr_aptpl_buf); | |
2986 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
2987 | } | |
2988 | } | |
2989 | ||
c66ac9db NB |
2990 | static int core_scsi3_pro_preempt( |
2991 | struct se_cmd *cmd, | |
2992 | int type, | |
2993 | int scope, | |
2994 | u64 res_key, | |
2995 | u64 sa_res_key, | |
2996 | int abort) | |
2997 | { | |
5951146d | 2998 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2999 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 3000 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 3001 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 3002 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
e3d6f909 | 3003 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
c66ac9db NB |
3004 | u32 pr_res_mapped_lun = 0; |
3005 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; | |
3006 | int prh_type = 0, prh_scope = 0, ret; | |
3007 | ||
03e98c9e NB |
3008 | if (!se_sess) { |
3009 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3010 | return -EINVAL; | |
3011 | } | |
c66ac9db | 3012 | |
5951146d | 3013 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3014 | se_sess); |
6708bb27 AG |
3015 | if (!pr_reg_n) { |
3016 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db NB |
3017 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
3018 | (abort) ? "_AND_ABORT" : ""); | |
03e98c9e NB |
3019 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3020 | return -EINVAL; | |
c66ac9db NB |
3021 | } |
3022 | if (pr_reg_n->pr_res_key != res_key) { | |
3023 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3024 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3025 | return -EINVAL; | |
c66ac9db NB |
3026 | } |
3027 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 3028 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 3029 | core_scsi3_put_pr_reg(pr_reg_n); |
03e98c9e NB |
3030 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3031 | return -EINVAL; | |
c66ac9db | 3032 | } |
c66ac9db NB |
3033 | |
3034 | spin_lock(&dev->dev_reservation_lock); | |
3035 | pr_res_holder = dev->dev_pr_res_holder; | |
3036 | if (pr_res_holder && | |
3037 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3038 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
3039 | all_reg = 1; | |
3040 | ||
6708bb27 | 3041 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
3042 | spin_unlock(&dev->dev_reservation_lock); |
3043 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3044 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3045 | return -EINVAL; | |
c66ac9db NB |
3046 | } |
3047 | /* | |
3048 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
3049 | * | |
3050 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
3051 | * persistent reservation holder or there is no persistent reservation | |
3052 | * holder (i.e., there is no persistent reservation), then the device | |
3053 | * server shall perform a preempt by doing the following in an | |
3054 | * uninterrupted series of actions. (See below..) | |
3055 | */ | |
6708bb27 | 3056 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
3057 | /* |
3058 | * No existing or SA Reservation Key matching reservations.. | |
3059 | * | |
3060 | * PROUT SA PREEMPT with All Registrant type reservations are | |
3061 | * allowed to be processed without a matching SA Reservation Key | |
3062 | */ | |
3063 | spin_lock(&pr_tmpl->registration_lock); | |
3064 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3065 | &pr_tmpl->registration_list, pr_reg_list) { | |
3066 | /* | |
3067 | * Removing of registrations in non all registrants | |
3068 | * type reservations without a matching SA reservation | |
3069 | * key. | |
3070 | * | |
3071 | * a) Remove the registrations for all I_T nexuses | |
3072 | * specified by the SERVICE ACTION RESERVATION KEY | |
3073 | * field; | |
3074 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
3075 | * c) Process tasks as defined in 5.7.1; and | |
3076 | * d) Establish a unit attention condition for the | |
3077 | * initiator port associated with every I_T nexus | |
3078 | * that lost its registration other than the I_T | |
3079 | * nexus on which the PERSISTENT RESERVE OUT command | |
3080 | * was received, with the additional sense code set | |
3081 | * to REGISTRATIONS PREEMPTED. | |
3082 | */ | |
6708bb27 | 3083 | if (!all_reg) { |
c66ac9db NB |
3084 | if (pr_reg->pr_res_key != sa_res_key) |
3085 | continue; | |
3086 | ||
3087 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3088 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3089 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3090 | __core_scsi3_free_registration(dev, pr_reg, | |
3091 | (abort) ? &preempt_and_abort_list : | |
3092 | NULL, calling_it_nexus); | |
3093 | released_regs++; | |
3094 | } else { | |
3095 | /* | |
3096 | * Case for any existing all registrants type | |
3097 | * reservation, follow logic in spc4r17 section | |
3098 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
3099 | * | |
3100 | * For a ZERO SA Reservation key, release | |
3101 | * all other registrations and do an implict | |
3102 | * release of active persistent reservation. | |
3103 | * | |
3104 | * For a non-ZERO SA Reservation key, only | |
3105 | * release the matching reservation key from | |
3106 | * registrations. | |
3107 | */ | |
3108 | if ((sa_res_key) && | |
3109 | (pr_reg->pr_res_key != sa_res_key)) | |
3110 | continue; | |
3111 | ||
3112 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3113 | if (calling_it_nexus) | |
3114 | continue; | |
3115 | ||
3116 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3117 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3118 | __core_scsi3_free_registration(dev, pr_reg, | |
3119 | (abort) ? &preempt_and_abort_list : | |
3120 | NULL, 0); | |
3121 | released_regs++; | |
3122 | } | |
6708bb27 | 3123 | if (!calling_it_nexus) |
c66ac9db NB |
3124 | core_scsi3_ua_allocate(pr_reg_nacl, |
3125 | pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3126 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3127 | } |
3128 | spin_unlock(&pr_tmpl->registration_lock); | |
3129 | /* | |
3130 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
3131 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
3132 | * RESERVATION KEY field to a value that does not match any | |
3133 | * registered reservation key, then the device server shall | |
3134 | * complete the command with RESERVATION CONFLICT status. | |
3135 | */ | |
6708bb27 | 3136 | if (!released_regs) { |
c66ac9db NB |
3137 | spin_unlock(&dev->dev_reservation_lock); |
3138 | core_scsi3_put_pr_reg(pr_reg_n); | |
03e98c9e NB |
3139 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3140 | return -EINVAL; | |
c66ac9db NB |
3141 | } |
3142 | /* | |
3143 | * For an existing all registrants type reservation | |
3144 | * with a zero SA rservation key, preempt the existing | |
3145 | * reservation with the new PR type and scope. | |
3146 | */ | |
3147 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
3148 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3149 | (abort) ? &preempt_and_abort_list : NULL, | |
3150 | type, scope, abort); | |
3151 | ||
3152 | if (abort) | |
3153 | core_scsi3_release_preempt_and_abort( | |
3154 | &preempt_and_abort_list, pr_reg_n); | |
3155 | } | |
3156 | spin_unlock(&dev->dev_reservation_lock); | |
3157 | ||
3158 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3159 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3160 | &pr_reg_n->pr_aptpl_buf[0], |
3161 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3162 | if (!ret) |
3163 | pr_debug("SPC-3 PR: Updated APTPL" | |
c66ac9db NB |
3164 | " metadata for PREEMPT%s\n", (abort) ? |
3165 | "_AND_ABORT" : ""); | |
3166 | } | |
3167 | ||
3168 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3169 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3170 | return 0; |
3171 | } | |
3172 | /* | |
3173 | * The PREEMPTing SA reservation key matches that of the | |
3174 | * existing persistent reservation, first, we check if | |
3175 | * we are preempting our own reservation. | |
3176 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3177 | * persistent reservations and registration handling | |
3178 | * | |
3179 | * If an all registrants persistent reservation is not | |
3180 | * present, it is not an error for the persistent | |
3181 | * reservation holder to preempt itself (i.e., a | |
3182 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3183 | * or a PREEMPT AND ABORT service action with the | |
3184 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3185 | * persistent reservation holder's reservation key that | |
3186 | * is received from the persistent reservation holder). | |
3187 | * In that case, the device server shall establish the | |
3188 | * new persistent reservation and maintain the | |
3189 | * registration. | |
3190 | */ | |
3191 | prh_type = pr_res_holder->pr_res_type; | |
3192 | prh_scope = pr_res_holder->pr_res_scope; | |
3193 | /* | |
3194 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3195 | * persistent reservation holder (see 5.7.10), the device | |
3196 | * server shall perform a preempt by doing the following as | |
3197 | * an uninterrupted series of actions: | |
3198 | * | |
3199 | * a) Release the persistent reservation for the holder | |
3200 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3201 | */ | |
3202 | if (pr_reg_n != pr_res_holder) | |
3203 | __core_scsi3_complete_pro_release(dev, | |
3204 | pr_res_holder->pr_reg_nacl, | |
3205 | dev->dev_pr_res_holder, 0); | |
3206 | /* | |
3207 | * b) Remove the registrations for all I_T nexuses identified | |
3208 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3209 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3210 | * OUT command. If an all registrants persistent reservation | |
3211 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3212 | * is set to zero, then all registrations shall be removed | |
3213 | * except for that of the I_T nexus that is being used for | |
3214 | * the PERSISTENT RESERVE OUT command; | |
3215 | */ | |
3216 | spin_lock(&pr_tmpl->registration_lock); | |
3217 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3218 | &pr_tmpl->registration_list, pr_reg_list) { | |
3219 | ||
3220 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3221 | if (calling_it_nexus) | |
3222 | continue; | |
3223 | ||
3224 | if (pr_reg->pr_res_key != sa_res_key) | |
3225 | continue; | |
3226 | ||
3227 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3228 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3229 | __core_scsi3_free_registration(dev, pr_reg, | |
3230 | (abort) ? &preempt_and_abort_list : NULL, | |
3231 | calling_it_nexus); | |
3232 | /* | |
3233 | * e) Establish a unit attention condition for the initiator | |
3234 | * port associated with every I_T nexus that lost its | |
3235 | * persistent reservation and/or registration, with the | |
3236 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3237 | */ | |
3238 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3239 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3240 | } |
3241 | spin_unlock(&pr_tmpl->registration_lock); | |
3242 | /* | |
3243 | * c) Establish a persistent reservation for the preempting | |
3244 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3245 | */ | |
3246 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3247 | (abort) ? &preempt_and_abort_list : NULL, | |
3248 | type, scope, abort); | |
3249 | /* | |
3250 | * d) Process tasks as defined in 5.7.1; | |
3251 | * e) See above.. | |
3252 | * f) If the type or scope has changed, then for every I_T nexus | |
3253 | * whose reservation key was not removed, except for the I_T | |
3254 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3255 | * received, the device server shall establish a unit | |
3256 | * attention condition for the initiator port associated with | |
3257 | * that I_T nexus, with the additional sense code set to | |
3258 | * RESERVATIONS RELEASED. If the type or scope have not | |
3259 | * changed, then no unit attention condition(s) shall be | |
3260 | * established for this reason. | |
3261 | */ | |
3262 | if ((prh_type != type) || (prh_scope != scope)) { | |
3263 | spin_lock(&pr_tmpl->registration_lock); | |
3264 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3265 | &pr_tmpl->registration_list, pr_reg_list) { | |
3266 | ||
3267 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3268 | if (calling_it_nexus) | |
3269 | continue; | |
3270 | ||
3271 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3272 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3273 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3274 | } | |
3275 | spin_unlock(&pr_tmpl->registration_lock); | |
3276 | } | |
3277 | spin_unlock(&dev->dev_reservation_lock); | |
3278 | /* | |
3279 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3280 | * All received CDBs for the matching existing reservation and | |
3281 | * registrations undergo ABORT_TASK logic. | |
3282 | * | |
3283 | * From there, core_scsi3_release_preempt_and_abort() will | |
3284 | * release every registration in the list (which have already | |
3285 | * been removed from the primary pr_reg list), except the | |
3286 | * new persistent reservation holder, the calling Initiator Port. | |
3287 | */ | |
3288 | if (abort) { | |
3289 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); | |
3290 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3291 | pr_reg_n); | |
3292 | } | |
3293 | ||
3294 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 3295 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3296 | &pr_reg_n->pr_aptpl_buf[0], |
3297 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3298 | if (!ret) |
3299 | pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" | |
c66ac9db NB |
3300 | "%s\n", (abort) ? "_AND_ABORT" : ""); |
3301 | } | |
3302 | ||
3303 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3304 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3305 | return 0; |
3306 | } | |
3307 | ||
3308 | static int core_scsi3_emulate_pro_preempt( | |
3309 | struct se_cmd *cmd, | |
3310 | int type, | |
3311 | int scope, | |
3312 | u64 res_key, | |
3313 | u64 sa_res_key, | |
3314 | int abort) | |
3315 | { | |
3316 | int ret = 0; | |
3317 | ||
3318 | switch (type) { | |
3319 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3320 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3321 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3322 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3323 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3324 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
3325 | ret = core_scsi3_pro_preempt(cmd, type, scope, | |
3326 | res_key, sa_res_key, abort); | |
3327 | break; | |
3328 | default: | |
6708bb27 | 3329 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
c66ac9db | 3330 | " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); |
03e98c9e NB |
3331 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3332 | return -EINVAL; | |
c66ac9db NB |
3333 | } |
3334 | ||
3335 | return ret; | |
3336 | } | |
3337 | ||
3338 | ||
3339 | static int core_scsi3_emulate_pro_register_and_move( | |
3340 | struct se_cmd *cmd, | |
3341 | u64 res_key, | |
3342 | u64 sa_res_key, | |
3343 | int aptpl, | |
3344 | int unreg) | |
3345 | { | |
e3d6f909 | 3346 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3347 | struct se_device *dev = cmd->se_dev; |
28168905 | 3348 | struct se_dev_entry *dest_se_deve = NULL; |
e3d6f909 | 3349 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3350 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3351 | struct se_port *se_port; | |
3352 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
3353 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; | |
3354 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; | |
e3d6f909 | 3355 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 3356 | unsigned char *buf; |
c66ac9db NB |
3357 | unsigned char *initiator_str; |
3358 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
3359 | u32 tid_len, tmp_tid_len; | |
3360 | int new_reg = 0, type, scope, ret, matching_iname, prf_isid; | |
3361 | unsigned short rtpi; | |
3362 | unsigned char proto_ident; | |
3363 | ||
6708bb27 AG |
3364 | if (!se_sess || !se_lun) { |
3365 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
03e98c9e NB |
3366 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3367 | return -EINVAL; | |
c66ac9db NB |
3368 | } |
3369 | memset(dest_iport, 0, 64); | |
3370 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
3371 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3372 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3373 | /* |
3374 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3375 | * Register behaviors for a REGISTER AND MOVE service action | |
3376 | * | |
3377 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3378 | */ | |
5951146d | 3379 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3380 | se_sess); |
6708bb27 AG |
3381 | if (!pr_reg) { |
3382 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3383 | " *pr_reg for REGISTER_AND_MOVE\n"); |
03e98c9e NB |
3384 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3385 | return -EINVAL; | |
c66ac9db NB |
3386 | } |
3387 | /* | |
3388 | * The provided reservation key much match the existing reservation key | |
3389 | * provided during this initiator's I_T nexus registration. | |
3390 | */ | |
3391 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3392 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3393 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3394 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
3395 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3396 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3397 | return -EINVAL; | |
c66ac9db NB |
3398 | } |
3399 | /* | |
3400 | * The service active reservation key needs to be non zero | |
3401 | */ | |
6708bb27 AG |
3402 | if (!sa_res_key) { |
3403 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db NB |
3404 | " sa_res_key\n"); |
3405 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3406 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3407 | return -EINVAL; | |
c66ac9db | 3408 | } |
05d1c7c0 | 3409 | |
c66ac9db NB |
3410 | /* |
3411 | * Determine the Relative Target Port Identifier where the reservation | |
3412 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3413 | * information. | |
3414 | */ | |
4949314c | 3415 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
3416 | rtpi = (buf[18] & 0xff) << 8; |
3417 | rtpi |= buf[19] & 0xff; | |
3418 | tid_len = (buf[20] & 0xff) << 24; | |
3419 | tid_len |= (buf[21] & 0xff) << 16; | |
3420 | tid_len |= (buf[22] & 0xff) << 8; | |
3421 | tid_len |= buf[23] & 0xff; | |
4949314c | 3422 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3423 | buf = NULL; |
c66ac9db NB |
3424 | |
3425 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3426 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3427 | " does not equal CDB data_length: %u\n", tid_len, |
3428 | cmd->data_length); | |
3429 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3430 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3431 | return -EINVAL; | |
c66ac9db NB |
3432 | } |
3433 | ||
3434 | spin_lock(&dev->se_port_lock); | |
3435 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3436 | if (se_port->sep_rtpi != rtpi) | |
3437 | continue; | |
3438 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3439 | if (!dest_se_tpg) |
c66ac9db | 3440 | continue; |
e3d6f909 | 3441 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3442 | if (!dest_tf_ops) |
c66ac9db NB |
3443 | continue; |
3444 | ||
3445 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); | |
3446 | smp_mb__after_atomic_inc(); | |
3447 | spin_unlock(&dev->se_port_lock); | |
3448 | ||
3449 | ret = core_scsi3_tpg_depend_item(dest_se_tpg); | |
3450 | if (ret != 0) { | |
6708bb27 | 3451 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db NB |
3452 | " for dest_se_tpg\n"); |
3453 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); | |
3454 | smp_mb__after_atomic_dec(); | |
3455 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3456 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3457 | return -EINVAL; | |
c66ac9db NB |
3458 | } |
3459 | ||
3460 | spin_lock(&dev->se_port_lock); | |
3461 | break; | |
3462 | } | |
3463 | spin_unlock(&dev->se_port_lock); | |
3464 | ||
6708bb27 AG |
3465 | if (!dest_se_tpg || !dest_tf_ops) { |
3466 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3467 | " fabric ops from Relative Target Port Identifier:" |
3468 | " %hu\n", rtpi); | |
3469 | core_scsi3_put_pr_reg(pr_reg); | |
03e98c9e NB |
3470 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3471 | return -EINVAL; | |
c66ac9db | 3472 | } |
05d1c7c0 | 3473 | |
4949314c | 3474 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
3475 | proto_ident = (buf[24] & 0x0f); |
3476 | #if 0 | |
6708bb27 | 3477 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db NB |
3478 | " 0x%02x\n", proto_ident); |
3479 | #endif | |
3480 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { | |
6708bb27 | 3481 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3482 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3483 | " from fabric: %s\n", proto_ident, | |
3484 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), | |
3485 | dest_tf_ops->get_fabric_name()); | |
03e98c9e NB |
3486 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3487 | ret = -EINVAL; | |
c66ac9db NB |
3488 | goto out; |
3489 | } | |
3490 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { | |
6708bb27 | 3491 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" |
c66ac9db NB |
3492 | " containg a valid tpg_parse_pr_out_transport_id" |
3493 | " function pointer\n"); | |
03e98c9e NB |
3494 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3495 | ret = -EINVAL; | |
c66ac9db NB |
3496 | goto out; |
3497 | } | |
3498 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, | |
3499 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); | |
6708bb27 AG |
3500 | if (!initiator_str) { |
3501 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3502 | " initiator_str from Transport ID\n"); |
03e98c9e NB |
3503 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3504 | ret = -EINVAL; | |
c66ac9db NB |
3505 | goto out; |
3506 | } | |
3507 | ||
4949314c | 3508 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3509 | buf = NULL; |
3510 | ||
6708bb27 | 3511 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3512 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3513 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3514 | iport_ptr : ""); | |
3515 | /* | |
3516 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3517 | * action specifies a TransportID that is the same as the initiator port | |
3518 | * of the I_T nexus for the command received, then the command shall | |
3519 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3520 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3521 | * IN PARAMETER LIST. | |
3522 | */ | |
3523 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3524 | matching_iname = (!strcmp(initiator_str, | |
3525 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3526 | if (!matching_iname) |
c66ac9db NB |
3527 | goto after_iport_check; |
3528 | ||
6708bb27 AG |
3529 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3530 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3531 | " matches: %s on received I_T Nexus\n", initiator_str, |
3532 | pr_reg_nacl->initiatorname); | |
03e98c9e NB |
3533 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3534 | ret = -EINVAL; | |
c66ac9db NB |
3535 | goto out; |
3536 | } | |
6708bb27 AG |
3537 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3538 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3539 | " matches: %s %s on received I_T Nexus\n", |
3540 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3541 | pr_reg->pr_reg_isid); | |
03e98c9e NB |
3542 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3543 | ret = -EINVAL; | |
c66ac9db NB |
3544 | goto out; |
3545 | } | |
3546 | after_iport_check: | |
3547 | /* | |
3548 | * Locate the destination struct se_node_acl from the received Transport ID | |
3549 | */ | |
28638887 | 3550 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db NB |
3551 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3552 | initiator_str); | |
3553 | if (dest_node_acl) { | |
3554 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
3555 | smp_mb__after_atomic_inc(); | |
3556 | } | |
28638887 | 3557 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db | 3558 | |
6708bb27 AG |
3559 | if (!dest_node_acl) { |
3560 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3561 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3562 | initiator_str); | |
03e98c9e NB |
3563 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3564 | ret = -EINVAL; | |
c66ac9db NB |
3565 | goto out; |
3566 | } | |
3567 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
3568 | if (ret != 0) { | |
6708bb27 | 3569 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db NB |
3570 | " dest_node_acl\n"); |
3571 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
3572 | smp_mb__after_atomic_dec(); | |
3573 | dest_node_acl = NULL; | |
03e98c9e NB |
3574 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3575 | ret = -EINVAL; | |
c66ac9db NB |
3576 | goto out; |
3577 | } | |
3578 | #if 0 | |
6708bb27 | 3579 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3580 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3581 | dest_node_acl->initiatorname); | |
3582 | #endif | |
3583 | /* | |
3584 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3585 | * PORT IDENTIFIER. | |
3586 | */ | |
3587 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3588 | if (!dest_se_deve) { |
3589 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3590 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
03e98c9e NB |
3591 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3592 | ret = -EINVAL; | |
c66ac9db NB |
3593 | goto out; |
3594 | } | |
3595 | ||
3596 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
3597 | if (ret < 0) { | |
6708bb27 | 3598 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
c66ac9db NB |
3599 | atomic_dec(&dest_se_deve->pr_ref_count); |
3600 | smp_mb__after_atomic_dec(); | |
3601 | dest_se_deve = NULL; | |
03e98c9e NB |
3602 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3603 | ret = -EINVAL; | |
c66ac9db NB |
3604 | goto out; |
3605 | } | |
3606 | #if 0 | |
6708bb27 | 3607 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3608 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3609 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3610 | dest_se_deve->mapped_lun); | |
3611 | #endif | |
3612 | /* | |
3613 | * A persistent reservation needs to already existing in order to | |
3614 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3615 | */ | |
3616 | spin_lock(&dev->dev_reservation_lock); | |
3617 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3618 | if (!pr_res_holder) { |
3619 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3620 | " currently held\n"); |
3621 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3622 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3623 | ret = -EINVAL; | |
c66ac9db NB |
3624 | goto out; |
3625 | } | |
3626 | /* | |
3627 | * The received on I_T Nexus must be the reservation holder. | |
3628 | * | |
3629 | * From spc4r17 section 5.7.8 Table 50 -- | |
3630 | * Register behaviors for a REGISTER AND MOVE service action | |
3631 | */ | |
3632 | if (pr_res_holder != pr_reg) { | |
6708bb27 | 3633 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3634 | " Nexus is not reservation holder\n"); |
3635 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3636 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3637 | ret = -EINVAL; | |
c66ac9db NB |
3638 | goto out; |
3639 | } | |
3640 | /* | |
3641 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3642 | * | |
3643 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3644 | * action is received and the established persistent reservation is a | |
3645 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3646 | * All Registrants type reservation, then the command shall be completed | |
3647 | * with RESERVATION CONFLICT status. | |
3648 | */ | |
3649 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3650 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3651 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3652 | " reservation for type: %s\n", |
3653 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3654 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3655 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3656 | ret = -EINVAL; | |
c66ac9db NB |
3657 | goto out; |
3658 | } | |
3659 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3660 | /* | |
3661 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3662 | */ | |
3663 | type = pr_res_holder->pr_res_type; | |
3664 | scope = pr_res_holder->pr_res_type; | |
3665 | /* | |
3666 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3667 | * RESERVATION KEY field with the I_T nexus specified as the | |
3668 | * destination of the register and move, where: | |
3669 | * A) The I_T nexus is specified by the TransportID and the | |
3670 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3671 | * B) Regardless of the TransportID format used, the association for | |
3672 | * the initiator port is based on either the initiator port name | |
3673 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3674 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3675 | * transport protocols where port names are not required; | |
3676 | * d) Register the reservation key specified in the SERVICE ACTION | |
3677 | * RESERVATION KEY field; | |
3678 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3679 | * RESERVATION KEY field and associated information; | |
3680 | * | |
3681 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3682 | * register an I_T nexus that is already registered with the same | |
3683 | * reservation key or a different reservation key. | |
3684 | */ | |
3685 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3686 | iport_ptr); | |
6708bb27 | 3687 | if (!dest_pr_reg) { |
5951146d | 3688 | ret = core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
3689 | dest_node_acl, dest_se_deve, iport_ptr, |
3690 | sa_res_key, 0, aptpl, 2, 1); | |
3691 | if (ret != 0) { | |
3692 | spin_unlock(&dev->dev_reservation_lock); | |
03e98c9e NB |
3693 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3694 | ret = -EINVAL; | |
c66ac9db NB |
3695 | goto out; |
3696 | } | |
3697 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3698 | iport_ptr); | |
3699 | new_reg = 1; | |
3700 | } | |
3701 | /* | |
3702 | * f) Release the persistent reservation for the persistent reservation | |
3703 | * holder (i.e., the I_T nexus on which the | |
3704 | */ | |
3705 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
3706 | dev->dev_pr_res_holder, 0); | |
3707 | /* | |
3708 | * g) Move the persistent reservation to the specified I_T nexus using | |
3709 | * the same scope and type as the persistent reservation released in | |
3710 | * item f); and | |
3711 | */ | |
3712 | dev->dev_pr_res_holder = dest_pr_reg; | |
3713 | dest_pr_reg->pr_res_holder = 1; | |
3714 | dest_pr_reg->pr_res_type = type; | |
3715 | pr_reg->pr_res_scope = scope; | |
3716 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
3717 | PR_REG_ISID_ID_LEN); | |
3718 | /* | |
3719 | * Increment PRGeneration for existing registrations.. | |
3720 | */ | |
6708bb27 | 3721 | if (!new_reg) |
c66ac9db NB |
3722 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3723 | spin_unlock(&dev->dev_reservation_lock); | |
3724 | ||
6708bb27 | 3725 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3726 | " created new reservation holder TYPE: %s on object RTPI:" |
3727 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3728 | core_scsi3_pr_dump_type(type), rtpi, | |
3729 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3730 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3731 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3732 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
3733 | (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), | |
3734 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? | |
3735 | iport_ptr : ""); | |
3736 | /* | |
3737 | * It is now safe to release configfs group dependencies for destination | |
3738 | * of Transport ID Initiator Device/Port Identifier | |
3739 | */ | |
3740 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3741 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3742 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3743 | /* | |
3744 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3745 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3746 | */ | |
3747 | if (unreg) { | |
3748 | spin_lock(&pr_tmpl->registration_lock); | |
3749 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3750 | spin_unlock(&pr_tmpl->registration_lock); | |
3751 | } else | |
3752 | core_scsi3_put_pr_reg(pr_reg); | |
3753 | ||
3754 | /* | |
3755 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
3756 | * write out the updated metadata to struct file for this SCSI device. | |
3757 | */ | |
6708bb27 | 3758 | if (!aptpl) { |
c66ac9db | 3759 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 3760 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 3761 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
3762 | " REGISTER_AND_MOVE\n"); |
3763 | } else { | |
3764 | pr_tmpl->pr_aptpl_active = 1; | |
5951146d | 3765 | ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db NB |
3766 | &dest_pr_reg->pr_aptpl_buf[0], |
3767 | pr_tmpl->pr_aptpl_buf_len); | |
6708bb27 AG |
3768 | if (!ret) |
3769 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for" | |
c66ac9db NB |
3770 | " REGISTER_AND_MOVE\n"); |
3771 | } | |
3772 | ||
4949314c | 3773 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3774 | |
c66ac9db NB |
3775 | core_scsi3_put_pr_reg(dest_pr_reg); |
3776 | return 0; | |
3777 | out: | |
05d1c7c0 | 3778 | if (buf) |
4949314c | 3779 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3780 | if (dest_se_deve) |
3781 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3782 | if (dest_node_acl) | |
3783 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3784 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3785 | core_scsi3_put_pr_reg(pr_reg); | |
3786 | return ret; | |
3787 | } | |
3788 | ||
3789 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3790 | { | |
3791 | unsigned int __v1, __v2; | |
3792 | ||
3793 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3794 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3795 | ||
3796 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3797 | } | |
3798 | ||
3799 | /* | |
3800 | * See spc4r17 section 6.14 Table 170 | |
3801 | */ | |
e76a35d6 | 3802 | int target_scsi3_emulate_pr_out(struct se_task *task) |
c66ac9db | 3803 | { |
e76a35d6 | 3804 | struct se_cmd *cmd = task->task_se_cmd; |
617c0e06 | 3805 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3806 | unsigned char *buf; |
c66ac9db NB |
3807 | u64 res_key, sa_res_key; |
3808 | int sa, scope, type, aptpl; | |
3809 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
d29a5b6a | 3810 | int ret; |
617c0e06 CH |
3811 | |
3812 | /* | |
3813 | * Following spc2r20 5.5.1 Reservations overview: | |
3814 | * | |
3815 | * If a logical unit has been reserved by any RESERVE command and is | |
3816 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3817 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3818 | * initiator or service action and shall terminate with a RESERVATION | |
3819 | * CONFLICT status. | |
3820 | */ | |
3821 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { | |
3822 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" | |
3823 | " SPC-2 reservation is held, returning" | |
3824 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
3825 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
3826 | ret = EINVAL; | |
d29a5b6a | 3827 | goto out; |
617c0e06 CH |
3828 | } |
3829 | ||
c66ac9db NB |
3830 | /* |
3831 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3832 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3833 | */ | |
03e98c9e NB |
3834 | if (!cmd->se_sess) { |
3835 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3836 | return -EINVAL; | |
3837 | } | |
c66ac9db NB |
3838 | |
3839 | if (cmd->data_length < 24) { | |
6708bb27 | 3840 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3841 | " length too small: %u\n", cmd->data_length); |
03e98c9e NB |
3842 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3843 | ret = -EINVAL; | |
d29a5b6a | 3844 | goto out; |
c66ac9db NB |
3845 | } |
3846 | /* | |
3847 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3848 | */ | |
3849 | sa = (cdb[1] & 0x1f); | |
3850 | scope = (cdb[2] & 0xf0); | |
3851 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3852 | |
4949314c | 3853 | buf = transport_kmap_data_sg(cmd); |
c66ac9db NB |
3854 | /* |
3855 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3856 | */ | |
3857 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3858 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3859 | /* | |
3860 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3861 | * SCSI TransportIDs. | |
3862 | */ | |
3863 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3864 | spec_i_pt = (buf[20] & 0x08); | |
3865 | all_tg_pt = (buf[20] & 0x04); | |
3866 | aptpl = (buf[20] & 0x01); | |
3867 | } else { | |
3868 | aptpl = (buf[17] & 0x01); | |
3869 | unreg = (buf[17] & 0x02); | |
3870 | } | |
4949314c | 3871 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3872 | buf = NULL; |
3873 | ||
c66ac9db NB |
3874 | /* |
3875 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3876 | */ | |
d29a5b6a | 3877 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) { |
03e98c9e NB |
3878 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3879 | ret = -EINVAL; | |
d29a5b6a CH |
3880 | goto out; |
3881 | } | |
3882 | ||
c66ac9db NB |
3883 | /* |
3884 | * From spc4r17 section 6.14: | |
3885 | * | |
3886 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3887 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3888 | * the command shall be terminated with CHECK CONDITION status, with | |
3889 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3890 | * code set to PARAMETER LIST LENGTH ERROR. | |
3891 | */ | |
6708bb27 | 3892 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3893 | (cmd->data_length != 24)) { |
6708bb27 | 3894 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3895 | " list length: %u\n", cmd->data_length); |
03e98c9e NB |
3896 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; |
3897 | ret = -EINVAL; | |
d29a5b6a | 3898 | goto out; |
c66ac9db NB |
3899 | } |
3900 | /* | |
3901 | * (core_scsi3_emulate_pro_* function parameters | |
3902 | * are defined by spc4r17 Table 174: | |
3903 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3904 | */ | |
3905 | switch (sa) { | |
3906 | case PRO_REGISTER: | |
d29a5b6a | 3907 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3908 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); |
d29a5b6a | 3909 | break; |
c66ac9db | 3910 | case PRO_RESERVE: |
d29a5b6a CH |
3911 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3912 | break; | |
c66ac9db | 3913 | case PRO_RELEASE: |
d29a5b6a CH |
3914 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3915 | break; | |
c66ac9db | 3916 | case PRO_CLEAR: |
d29a5b6a CH |
3917 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3918 | break; | |
c66ac9db | 3919 | case PRO_PREEMPT: |
d29a5b6a | 3920 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3921 | res_key, sa_res_key, 0); |
d29a5b6a | 3922 | break; |
c66ac9db | 3923 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3924 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3925 | res_key, sa_res_key, 1); |
d29a5b6a | 3926 | break; |
c66ac9db | 3927 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3928 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3929 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); |
d29a5b6a | 3930 | break; |
c66ac9db | 3931 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3932 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3933 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3934 | break; |
c66ac9db | 3935 | default: |
6708bb27 | 3936 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3937 | " action: 0x%02x\n", cdb[1] & 0x1f); |
03e98c9e NB |
3938 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3939 | ret = -EINVAL; | |
d29a5b6a | 3940 | break; |
c66ac9db NB |
3941 | } |
3942 | ||
d29a5b6a CH |
3943 | out: |
3944 | if (!ret) { | |
3945 | task->task_scsi_status = GOOD; | |
3946 | transport_complete_task(task, 1); | |
3947 | } | |
3948 | return ret; | |
c66ac9db NB |
3949 | } |
3950 | ||
3951 | /* | |
3952 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3953 | * | |
3954 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3955 | */ | |
3956 | static int core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
3957 | { | |
5951146d | 3958 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 3959 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 3960 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3961 | unsigned char *buf; |
c66ac9db NB |
3962 | u32 add_len = 0, off = 8; |
3963 | ||
3964 | if (cmd->data_length < 8) { | |
6708bb27 | 3965 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3966 | " too small\n", cmd->data_length); |
03e98c9e NB |
3967 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
3968 | return -EINVAL; | |
c66ac9db NB |
3969 | } |
3970 | ||
4949314c | 3971 | buf = transport_kmap_data_sg(cmd); |
e3d6f909 AG |
3972 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
3973 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
3974 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
3975 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3976 | |
e3d6f909 AG |
3977 | spin_lock(&su_dev->t10_pr.registration_lock); |
3978 | list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, | |
c66ac9db NB |
3979 | pr_reg_list) { |
3980 | /* | |
3981 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3982 | * next reservation key list descriptor. | |
3983 | */ | |
3984 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3985 | break; | |
3986 | ||
3987 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3988 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3989 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3990 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3991 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3992 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3993 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3994 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3995 | ||
3996 | add_len += 8; | |
3997 | } | |
e3d6f909 | 3998 | spin_unlock(&su_dev->t10_pr.registration_lock); |
c66ac9db NB |
3999 | |
4000 | buf[4] = ((add_len >> 24) & 0xff); | |
4001 | buf[5] = ((add_len >> 16) & 0xff); | |
4002 | buf[6] = ((add_len >> 8) & 0xff); | |
4003 | buf[7] = (add_len & 0xff); | |
4004 | ||
4949314c | 4005 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4006 | |
c66ac9db NB |
4007 | return 0; |
4008 | } | |
4009 | ||
4010 | /* | |
4011 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
4012 | * | |
4013 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
4014 | */ | |
4015 | static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
4016 | { | |
5951146d | 4017 | struct se_device *se_dev = cmd->se_dev; |
e3d6f909 | 4018 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db | 4019 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 4020 | unsigned char *buf; |
c66ac9db NB |
4021 | u64 pr_res_key; |
4022 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
4023 | ||
4024 | if (cmd->data_length < 8) { | |
6708bb27 | 4025 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 4026 | " too small\n", cmd->data_length); |
03e98c9e NB |
4027 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4028 | return -EINVAL; | |
c66ac9db NB |
4029 | } |
4030 | ||
4949314c | 4031 | buf = transport_kmap_data_sg(cmd); |
e3d6f909 AG |
4032 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4033 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4034 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4035 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4036 | |
4037 | spin_lock(&se_dev->dev_reservation_lock); | |
4038 | pr_reg = se_dev->dev_pr_res_holder; | |
4039 | if ((pr_reg)) { | |
4040 | /* | |
4041 | * Set the hardcoded Additional Length | |
4042 | */ | |
4043 | buf[4] = ((add_len >> 24) & 0xff); | |
4044 | buf[5] = ((add_len >> 16) & 0xff); | |
4045 | buf[6] = ((add_len >> 8) & 0xff); | |
4046 | buf[7] = (add_len & 0xff); | |
4047 | ||
05d1c7c0 AG |
4048 | if (cmd->data_length < 22) |
4049 | goto err; | |
4050 | ||
c66ac9db NB |
4051 | /* |
4052 | * Set the Reservation key. | |
4053 | * | |
4054 | * From spc4r17, section 5.7.10: | |
4055 | * A persistent reservation holder has its reservation key | |
4056 | * returned in the parameter data from a PERSISTENT | |
4057 | * RESERVE IN command with READ RESERVATION service action as | |
4058 | * follows: | |
4059 | * a) For a persistent reservation of the type Write Exclusive | |
4060 | * - All Registrants or Exclusive Access  All Regitrants, | |
4061 | * the reservation key shall be set to zero; or | |
4062 | * b) For all other persistent reservation types, the | |
4063 | * reservation key shall be set to the registered | |
4064 | * reservation key for the I_T nexus that holds the | |
4065 | * persistent reservation. | |
4066 | */ | |
4067 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
4068 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
4069 | pr_res_key = 0; | |
4070 | else | |
4071 | pr_res_key = pr_reg->pr_res_key; | |
4072 | ||
4073 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
4074 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
4075 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
4076 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
4077 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
4078 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
4079 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
4080 | buf[15] = (pr_res_key & 0xff); | |
4081 | /* | |
4082 | * Set the SCOPE and TYPE | |
4083 | */ | |
4084 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
4085 | (pr_reg->pr_res_type & 0x0f); | |
4086 | } | |
05d1c7c0 AG |
4087 | |
4088 | err: | |
c66ac9db | 4089 | spin_unlock(&se_dev->dev_reservation_lock); |
4949314c | 4090 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
4091 | |
4092 | return 0; | |
4093 | } | |
4094 | ||
4095 | /* | |
4096 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
4097 | * | |
4098 | * See spc4r17 section 6.13.4 Table 165 | |
4099 | */ | |
4100 | static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
4101 | { | |
5951146d | 4102 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 4103 | struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4104 | unsigned char *buf; |
c66ac9db NB |
4105 | u16 add_len = 8; /* Hardcoded to 8. */ |
4106 | ||
4107 | if (cmd->data_length < 6) { | |
6708bb27 | 4108 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 4109 | " %u too small\n", cmd->data_length); |
03e98c9e NB |
4110 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4111 | return -EINVAL; | |
c66ac9db NB |
4112 | } |
4113 | ||
4949314c | 4114 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 4115 | |
c66ac9db NB |
4116 | buf[0] = ((add_len << 8) & 0xff); |
4117 | buf[1] = (add_len & 0xff); | |
4118 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
4119 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
4120 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
4121 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
4122 | /* | |
4123 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
4124 | * set the TMV: Task Mask Valid bit. | |
4125 | */ | |
4126 | buf[3] |= 0x80; | |
4127 | /* | |
4128 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
4129 | */ | |
4130 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
4131 | /* | |
4132 | * PTPL_A: Persistence across Target Power Loss Active bit | |
4133 | */ | |
4134 | if (pr_tmpl->pr_aptpl_active) | |
4135 | buf[3] |= 0x01; | |
4136 | /* | |
4137 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
4138 | */ | |
4139 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4140 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
4141 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
4142 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
4143 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
4144 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4145 | ||
4949314c | 4146 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4147 | |
c66ac9db NB |
4148 | return 0; |
4149 | } | |
4150 | ||
4151 | /* | |
4152 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
4153 | * | |
4154 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
4155 | */ | |
4156 | static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
4157 | { | |
5951146d | 4158 | struct se_device *se_dev = cmd->se_dev; |
c66ac9db | 4159 | struct se_node_acl *se_nacl; |
e3d6f909 | 4160 | struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; |
c66ac9db NB |
4161 | struct se_portal_group *se_tpg; |
4162 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
e3d6f909 | 4163 | struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; |
05d1c7c0 | 4164 | unsigned char *buf; |
c66ac9db NB |
4165 | u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; |
4166 | u32 off = 8; /* off into first Full Status descriptor */ | |
4167 | int format_code = 0; | |
4168 | ||
4169 | if (cmd->data_length < 8) { | |
6708bb27 | 4170 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 4171 | " too small\n", cmd->data_length); |
03e98c9e NB |
4172 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4173 | return -EINVAL; | |
c66ac9db NB |
4174 | } |
4175 | ||
4949314c | 4176 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 4177 | |
e3d6f909 AG |
4178 | buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); |
4179 | buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); | |
4180 | buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); | |
4181 | buf[3] = (su_dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4182 | |
4183 | spin_lock(&pr_tmpl->registration_lock); | |
4184 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
4185 | &pr_tmpl->registration_list, pr_reg_list) { | |
4186 | ||
4187 | se_nacl = pr_reg->pr_reg_nacl; | |
4188 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
4189 | add_desc_len = 0; | |
4190 | ||
4191 | atomic_inc(&pr_reg->pr_res_holders); | |
4192 | smp_mb__after_atomic_inc(); | |
4193 | spin_unlock(&pr_tmpl->registration_lock); | |
4194 | /* | |
4195 | * Determine expected length of $FABRIC_MOD specific | |
4196 | * TransportID full status descriptor.. | |
4197 | */ | |
e3d6f909 | 4198 | exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( |
c66ac9db NB |
4199 | se_tpg, se_nacl, pr_reg, &format_code); |
4200 | ||
4201 | if ((exp_desc_len + add_len) > cmd->data_length) { | |
6708bb27 | 4202 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
4203 | " out of buffer: %d\n", cmd->data_length); |
4204 | spin_lock(&pr_tmpl->registration_lock); | |
4205 | atomic_dec(&pr_reg->pr_res_holders); | |
4206 | smp_mb__after_atomic_dec(); | |
4207 | break; | |
4208 | } | |
4209 | /* | |
4210 | * Set RESERVATION KEY | |
4211 | */ | |
4212 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4213 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4214 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4215 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4216 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4217 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4218 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4219 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4220 | off += 4; /* Skip Over Reserved area */ | |
4221 | ||
4222 | /* | |
4223 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4224 | */ | |
4225 | if (pr_reg->pr_reg_all_tg_pt) | |
4226 | buf[off] = 0x02; | |
4227 | /* | |
4228 | * The struct se_lun pointer will be present for the | |
4229 | * reservation holder for PR_HOLDER bit. | |
4230 | * | |
4231 | * Also, if this registration is the reservation | |
4232 | * holder, fill in SCOPE and TYPE in the next byte. | |
4233 | */ | |
4234 | if (pr_reg->pr_res_holder) { | |
4235 | buf[off++] |= 0x01; | |
4236 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4237 | (pr_reg->pr_res_type & 0x0f); | |
4238 | } else | |
4239 | off += 2; | |
4240 | ||
4241 | off += 4; /* Skip over reserved area */ | |
4242 | /* | |
4243 | * From spc4r17 6.3.15: | |
4244 | * | |
4245 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4246 | * IDENTIFIER field contains the relative port identifier (see | |
4247 | * 3.1.120) of the target port that is part of the I_T nexus | |
4248 | * described by this full status descriptor. If the ALL_TG_PT | |
4249 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4250 | * IDENTIFIER field are not defined by this standard. | |
4251 | */ | |
6708bb27 | 4252 | if (!pr_reg->pr_reg_all_tg_pt) { |
c66ac9db NB |
4253 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
4254 | ||
4255 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
4256 | buf[off++] = (port->sep_rtpi & 0xff); | |
4257 | } else | |
4258 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ | |
4259 | ||
4260 | /* | |
4261 | * Now, have the $FABRIC_MOD fill in the protocol identifier | |
4262 | */ | |
e3d6f909 | 4263 | desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, |
c66ac9db NB |
4264 | se_nacl, pr_reg, &format_code, &buf[off+4]); |
4265 | ||
4266 | spin_lock(&pr_tmpl->registration_lock); | |
4267 | atomic_dec(&pr_reg->pr_res_holders); | |
4268 | smp_mb__after_atomic_dec(); | |
4269 | /* | |
4270 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4271 | */ | |
4272 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4273 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4274 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4275 | buf[off++] = (desc_len & 0xff); | |
4276 | /* | |
4277 | * Size of full desctipor header minus TransportID | |
4278 | * containing $FABRIC_MOD specific) initiator device/port | |
4279 | * WWN information. | |
4280 | * | |
4281 | * See spc4r17 Section 6.13.5 Table 169 | |
4282 | */ | |
4283 | add_desc_len = (24 + desc_len); | |
4284 | ||
4285 | off += desc_len; | |
4286 | add_len += add_desc_len; | |
4287 | } | |
4288 | spin_unlock(&pr_tmpl->registration_lock); | |
4289 | /* | |
4290 | * Set ADDITIONAL_LENGTH | |
4291 | */ | |
4292 | buf[4] = ((add_len >> 24) & 0xff); | |
4293 | buf[5] = ((add_len >> 16) & 0xff); | |
4294 | buf[6] = ((add_len >> 8) & 0xff); | |
4295 | buf[7] = (add_len & 0xff); | |
4296 | ||
4949314c | 4297 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4298 | |
c66ac9db NB |
4299 | return 0; |
4300 | } | |
4301 | ||
e76a35d6 | 4302 | int target_scsi3_emulate_pr_in(struct se_task *task) |
c66ac9db | 4303 | { |
e76a35d6 | 4304 | struct se_cmd *cmd = task->task_se_cmd; |
d29a5b6a | 4305 | int ret; |
e76a35d6 | 4306 | |
c66ac9db NB |
4307 | /* |
4308 | * Following spc2r20 5.5.1 Reservations overview: | |
4309 | * | |
4310 | * If a logical unit has been reserved by any RESERVE command and is | |
4311 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4312 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4313 | * initiator or service action and shall terminate with a RESERVATION | |
4314 | * CONFLICT status. | |
4315 | */ | |
617c0e06 | 4316 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) { |
6708bb27 | 4317 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4318 | " SPC-2 reservation is held, returning" |
4319 | " RESERVATION_CONFLICT\n"); | |
03e98c9e NB |
4320 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
4321 | return -EINVAL; | |
c66ac9db NB |
4322 | } |
4323 | ||
617c0e06 CH |
4324 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4325 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4326 | ret = core_scsi3_pri_read_keys(cmd); |
4327 | break; | |
617c0e06 | 4328 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4329 | ret = core_scsi3_pri_read_reservation(cmd); |
4330 | break; | |
617c0e06 | 4331 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4332 | ret = core_scsi3_pri_report_capabilities(cmd); |
4333 | break; | |
617c0e06 | 4334 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4335 | ret = core_scsi3_pri_read_full_status(cmd); |
4336 | break; | |
617c0e06 CH |
4337 | default: |
4338 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4339 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
03e98c9e NB |
4340 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
4341 | ret = -EINVAL; | |
d29a5b6a CH |
4342 | break; |
4343 | } | |
4344 | ||
4345 | if (!ret) { | |
4346 | task->task_scsi_status = GOOD; | |
4347 | transport_complete_task(task, 1); | |
617c0e06 | 4348 | } |
d29a5b6a | 4349 | return ret; |
c66ac9db NB |
4350 | } |
4351 | ||
4352 | static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) | |
4353 | { | |
4354 | return 0; | |
4355 | } | |
4356 | ||
4357 | static int core_pt_seq_non_holder( | |
4358 | struct se_cmd *cmd, | |
4359 | unsigned char *cdb, | |
4360 | u32 pr_reg_type) | |
4361 | { | |
4362 | return 0; | |
4363 | } | |
4364 | ||
4365 | int core_setup_reservations(struct se_device *dev, int force_pt) | |
4366 | { | |
4367 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; | |
e3d6f909 | 4368 | struct t10_reservation *rest = &su_dev->t10_pr; |
c66ac9db NB |
4369 | /* |
4370 | * If this device is from Target_Core_Mod/pSCSI, use the reservations | |
4371 | * of the Underlying SCSI hardware. In Linux/SCSI terms, this can | |
4372 | * cause a problem because libata and some SATA RAID HBAs appear | |
4373 | * under Linux/SCSI, but to emulate reservations themselves. | |
4374 | */ | |
e3d6f909 AG |
4375 | if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && |
4376 | !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) { | |
c66ac9db NB |
4377 | rest->res_type = SPC_PASSTHROUGH; |
4378 | rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; | |
4379 | rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; | |
6708bb27 | 4380 | pr_debug("%s: Using SPC_PASSTHROUGH, no reservation" |
e3d6f909 | 4381 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4382 | return 0; |
4383 | } | |
4384 | /* | |
4385 | * If SPC-3 or above is reported by real or emulated struct se_device, | |
4386 | * use emulated Persistent Reservations. | |
4387 | */ | |
e3d6f909 | 4388 | if (dev->transport->get_device_rev(dev) >= SCSI_3) { |
c66ac9db NB |
4389 | rest->res_type = SPC3_PERSISTENT_RESERVATIONS; |
4390 | rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; | |
4391 | rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; | |
6708bb27 | 4392 | pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS" |
e3d6f909 | 4393 | " emulation\n", dev->transport->name); |
c66ac9db NB |
4394 | } else { |
4395 | rest->res_type = SPC2_RESERVATIONS; | |
4396 | rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; | |
4397 | rest->pr_ops.t10_seq_non_holder = | |
4398 | &core_scsi2_reservation_seq_non_holder; | |
6708bb27 | 4399 | pr_debug("%s: Using SPC2_RESERVATIONS emulation\n", |
e3d6f909 | 4400 | dev->transport->name); |
c66ac9db NB |
4401 | } |
4402 | ||
4403 | return 0; | |
4404 | } |