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