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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 | ||
28 | #include <linux/version.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/list.h> | |
32 | #include <scsi/scsi.h> | |
33 | #include <scsi/scsi_cmnd.h> | |
34 | #include <asm/unaligned.h> | |
35 | ||
36 | #include <target/target_core_base.h> | |
37 | #include <target/target_core_device.h> | |
38 | #include <target/target_core_tmr.h> | |
39 | #include <target/target_core_tpg.h> | |
40 | #include <target/target_core_transport.h> | |
41 | #include <target/target_core_fabric_ops.h> | |
42 | #include <target/target_core_configfs.h> | |
43 | ||
44 | #include "target_core_hba.h" | |
45 | #include "target_core_pr.h" | |
46 | #include "target_core_ua.h" | |
47 | ||
48 | /* | |
49 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) | |
50 | */ | |
51 | struct pr_transport_id_holder { | |
52 | int dest_local_nexus; | |
53 | struct t10_pr_registration *dest_pr_reg; | |
54 | struct se_portal_group *dest_tpg; | |
55 | struct se_node_acl *dest_node_acl; | |
56 | struct se_dev_entry *dest_se_deve; | |
57 | struct list_head dest_list; | |
58 | }; | |
59 | ||
60 | int core_pr_dump_initiator_port( | |
61 | struct t10_pr_registration *pr_reg, | |
62 | char *buf, | |
63 | u32 size) | |
64 | { | |
65 | if (!(pr_reg->isid_present_at_reg)) | |
66 | return 0; | |
67 | ||
68 | snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]); | |
69 | return 1; | |
70 | } | |
71 | ||
72 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, | |
73 | struct t10_pr_registration *, int); | |
74 | ||
75 | static int core_scsi2_reservation_seq_non_holder( | |
76 | struct se_cmd *cmd, | |
77 | unsigned char *cdb, | |
78 | u32 pr_reg_type) | |
79 | { | |
80 | switch (cdb[0]) { | |
81 | case INQUIRY: | |
82 | case RELEASE: | |
83 | case RELEASE_10: | |
84 | return 0; | |
85 | default: | |
86 | return 1; | |
87 | } | |
88 | ||
89 | return 1; | |
90 | } | |
91 | ||
92 | static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type) | |
93 | { | |
94 | struct se_device *dev = cmd->se_dev; | |
95 | struct se_session *sess = cmd->se_sess; | |
96 | int ret; | |
97 | ||
98 | if (!(sess)) | |
99 | return 0; | |
100 | ||
101 | spin_lock(&dev->dev_reservation_lock); | |
102 | if (!dev->dev_reserved_node_acl || !sess) { | |
103 | spin_unlock(&dev->dev_reservation_lock); | |
104 | return 0; | |
105 | } | |
106 | if (dev->dev_reserved_node_acl != sess->se_node_acl) { | |
107 | spin_unlock(&dev->dev_reservation_lock); | |
108 | return -1; | |
109 | } | |
110 | if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) { | |
111 | spin_unlock(&dev->dev_reservation_lock); | |
112 | return 0; | |
113 | } | |
114 | ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -1; | |
115 | spin_unlock(&dev->dev_reservation_lock); | |
116 | ||
117 | return ret; | |
118 | } | |
119 | ||
120 | static int core_scsi2_reservation_release(struct se_cmd *cmd) | |
121 | { | |
122 | struct se_device *dev = cmd->se_dev; | |
123 | struct se_session *sess = cmd->se_sess; | |
124 | struct se_portal_group *tpg = sess->se_tpg; | |
125 | ||
126 | if (!(sess) || !(tpg)) | |
127 | return 0; | |
128 | ||
129 | spin_lock(&dev->dev_reservation_lock); | |
130 | if (!dev->dev_reserved_node_acl || !sess) { | |
131 | spin_unlock(&dev->dev_reservation_lock); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | if (dev->dev_reserved_node_acl != sess->se_node_acl) { | |
136 | spin_unlock(&dev->dev_reservation_lock); | |
137 | return 0; | |
138 | } | |
139 | dev->dev_reserved_node_acl = NULL; | |
140 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; | |
141 | if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { | |
142 | dev->dev_res_bin_isid = 0; | |
143 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; | |
144 | } | |
145 | printk(KERN_INFO "SCSI-2 Released reservation for %s LUN: %u ->" | |
146 | " MAPPED LUN: %u for %s\n", TPG_TFO(tpg)->get_fabric_name(), | |
147 | SE_LUN(cmd)->unpacked_lun, cmd->se_deve->mapped_lun, | |
148 | sess->se_node_acl->initiatorname); | |
149 | spin_unlock(&dev->dev_reservation_lock); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int core_scsi2_reservation_reserve(struct se_cmd *cmd) | |
155 | { | |
156 | struct se_device *dev = cmd->se_dev; | |
157 | struct se_session *sess = cmd->se_sess; | |
158 | struct se_portal_group *tpg = sess->se_tpg; | |
159 | ||
160 | if ((T_TASK(cmd)->t_task_cdb[1] & 0x01) && | |
161 | (T_TASK(cmd)->t_task_cdb[1] & 0x02)) { | |
162 | printk(KERN_ERR "LongIO and Obselete Bits set, returning" | |
163 | " ILLEGAL_REQUEST\n"); | |
164 | return PYX_TRANSPORT_ILLEGAL_REQUEST; | |
165 | } | |
166 | /* | |
167 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
168 | * ops | |
169 | */ | |
170 | if (!(sess) || !(tpg)) | |
171 | return 0; | |
172 | ||
173 | spin_lock(&dev->dev_reservation_lock); | |
174 | if (dev->dev_reserved_node_acl && | |
175 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
176 | printk(KERN_ERR "SCSI-2 RESERVATION CONFLIFT for %s fabric\n", | |
177 | TPG_TFO(tpg)->get_fabric_name()); | |
178 | printk(KERN_ERR "Original reserver LUN: %u %s\n", | |
179 | SE_LUN(cmd)->unpacked_lun, | |
180 | dev->dev_reserved_node_acl->initiatorname); | |
181 | printk(KERN_ERR "Current attempt - LUN: %u -> MAPPED LUN: %u" | |
182 | " from %s \n", SE_LUN(cmd)->unpacked_lun, | |
183 | cmd->se_deve->mapped_lun, | |
184 | sess->se_node_acl->initiatorname); | |
185 | spin_unlock(&dev->dev_reservation_lock); | |
186 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
187 | } | |
188 | ||
189 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
190 | dev->dev_flags |= DF_SPC2_RESERVATIONS; | |
191 | if (sess->sess_bin_isid != 0) { | |
192 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
193 | dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; | |
194 | } | |
195 | printk(KERN_INFO "SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" | |
196 | " for %s\n", TPG_TFO(tpg)->get_fabric_name(), | |
197 | SE_LUN(cmd)->unpacked_lun, cmd->se_deve->mapped_lun, | |
198 | sess->se_node_acl->initiatorname); | |
199 | spin_unlock(&dev->dev_reservation_lock); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, | |
205 | struct se_node_acl *, struct se_session *); | |
206 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
207 | ||
208 | /* | |
209 | * Setup in target_core_transport.c:transport_generic_cmd_sequencer() | |
210 | * and called via struct se_cmd->transport_emulate_cdb() in TCM processing | |
211 | * thread context. | |
212 | */ | |
213 | int core_scsi2_emulate_crh(struct se_cmd *cmd) | |
214 | { | |
215 | struct se_session *se_sess = cmd->se_sess; | |
216 | struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; | |
217 | struct t10_pr_registration *pr_reg; | |
218 | struct t10_reservation_template *pr_tmpl = &su_dev->t10_reservation; | |
219 | unsigned char *cdb = &T_TASK(cmd)->t_task_cdb[0]; | |
220 | int crh = (T10_RES(su_dev)->res_type == SPC3_PERSISTENT_RESERVATIONS); | |
221 | int conflict = 0; | |
222 | ||
223 | if (!(se_sess)) | |
224 | return 0; | |
225 | ||
226 | if (!(crh)) | |
227 | goto after_crh; | |
228 | ||
229 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, | |
230 | se_sess); | |
231 | if (pr_reg) { | |
232 | /* | |
233 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
234 | * behavior | |
235 | * | |
236 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
237 | * status, but no reservation shall be established and the | |
238 | * persistent reservation shall not be changed, if the command | |
239 | * is received from a) and b) below. | |
240 | * | |
241 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
242 | * status, but the persistent reservation shall not be released, | |
243 | * if the command is received from a) and b) | |
244 | * | |
245 | * a) An I_T nexus that is a persistent reservation holder; or | |
246 | * b) An I_T nexus that is registered if a registrants only or | |
247 | * all registrants type persistent reservation is present. | |
248 | * | |
249 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
250 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
251 | * as defined in SPC-2. | |
252 | */ | |
253 | if (pr_reg->pr_res_holder) { | |
254 | core_scsi3_put_pr_reg(pr_reg); | |
255 | return 0; | |
256 | } | |
257 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
258 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
259 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
260 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
261 | core_scsi3_put_pr_reg(pr_reg); | |
262 | return 0; | |
263 | } | |
264 | core_scsi3_put_pr_reg(pr_reg); | |
265 | conflict = 1; | |
266 | } else { | |
267 | /* | |
268 | * Following spc2r20 5.5.1 Reservations overview: | |
269 | * | |
270 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
271 | * command with the REGISTER or the REGISTER AND IGNORE | |
272 | * EXISTING KEY service action and is still registered by any | |
273 | * initiator, all RESERVE commands and all RELEASE commands | |
274 | * regardless of initiator shall conflict and shall terminate | |
275 | * with a RESERVATION CONFLICT status. | |
276 | */ | |
277 | spin_lock(&pr_tmpl->registration_lock); | |
278 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
279 | spin_unlock(&pr_tmpl->registration_lock); | |
280 | } | |
281 | ||
282 | if (conflict) { | |
283 | printk(KERN_ERR "Received legacy SPC-2 RESERVE/RELEASE" | |
284 | " while active SPC-3 registrations exist," | |
285 | " returning RESERVATION_CONFLICT\n"); | |
286 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
287 | } | |
288 | ||
289 | after_crh: | |
290 | if ((cdb[0] == RESERVE) || (cdb[0] == RESERVE_10)) | |
291 | return core_scsi2_reservation_reserve(cmd); | |
292 | else if ((cdb[0] == RELEASE) || (cdb[0] == RELEASE_10)) | |
293 | return core_scsi2_reservation_release(cmd); | |
294 | else | |
295 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
296 | } | |
297 | ||
298 | /* | |
299 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
300 | * | |
301 | * This function is called by those initiator ports who are *NOT* | |
302 | * the active PR reservation holder when a reservation is present. | |
303 | */ | |
304 | static int core_scsi3_pr_seq_non_holder( | |
305 | struct se_cmd *cmd, | |
306 | unsigned char *cdb, | |
307 | u32 pr_reg_type) | |
308 | { | |
309 | struct se_dev_entry *se_deve; | |
310 | struct se_session *se_sess = SE_SESS(cmd); | |
311 | int other_cdb = 0, ignore_reg; | |
312 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
313 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
314 | int we = 0; /* Write Exclusive */ | |
315 | int legacy = 0; /* Act like a legacy device and return | |
316 | * RESERVATION CONFLICT on some CDBs */ | |
317 | /* | |
318 | * A legacy SPC-2 reservation is being held. | |
319 | */ | |
320 | if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) | |
321 | return core_scsi2_reservation_seq_non_holder(cmd, | |
322 | cdb, pr_reg_type); | |
323 | ||
324 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
325 | /* | |
326 | * Determine if the registration should be ignored due to | |
327 | * non-matching ISIDs in core_scsi3_pr_reservation_check(). | |
328 | */ | |
329 | ignore_reg = (pr_reg_type & 0x80000000); | |
330 | if (ignore_reg) | |
331 | pr_reg_type &= ~0x80000000; | |
332 | ||
333 | switch (pr_reg_type) { | |
334 | case PR_TYPE_WRITE_EXCLUSIVE: | |
335 | we = 1; | |
336 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
337 | /* | |
338 | * Some commands are only allowed for the persistent reservation | |
339 | * holder. | |
340 | */ | |
341 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
342 | registered_nexus = 1; | |
343 | break; | |
344 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
345 | we = 1; | |
346 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
347 | /* | |
348 | * Some commands are only allowed for registered I_T Nexuses. | |
349 | */ | |
350 | reg_only = 1; | |
351 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
352 | registered_nexus = 1; | |
353 | break; | |
354 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
355 | we = 1; | |
356 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
357 | /* | |
358 | * Each registered I_T Nexus is a reservation holder. | |
359 | */ | |
360 | all_reg = 1; | |
361 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
362 | registered_nexus = 1; | |
363 | break; | |
364 | default: | |
365 | return -1; | |
366 | } | |
367 | /* | |
368 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
369 | */ | |
370 | switch (cdb[0]) { | |
371 | case SECURITY_PROTOCOL_IN: | |
372 | if (registered_nexus) | |
373 | return 0; | |
374 | ret = (we) ? 0 : 1; | |
375 | break; | |
376 | case MODE_SENSE: | |
377 | case MODE_SENSE_10: | |
378 | case READ_ATTRIBUTE: | |
379 | case READ_BUFFER: | |
380 | case RECEIVE_DIAGNOSTIC: | |
381 | if (legacy) { | |
382 | ret = 1; | |
383 | break; | |
384 | } | |
385 | if (registered_nexus) { | |
386 | ret = 0; | |
387 | break; | |
388 | } | |
389 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
390 | break; | |
391 | case PERSISTENT_RESERVE_OUT: | |
392 | /* | |
393 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
394 | * are allowed in the presence of various reservations. | |
395 | * See spc4r17, table 46 | |
396 | */ | |
397 | switch (cdb[1] & 0x1f) { | |
398 | case PRO_CLEAR: | |
399 | case PRO_PREEMPT: | |
400 | case PRO_PREEMPT_AND_ABORT: | |
401 | ret = (registered_nexus) ? 0 : 1; | |
402 | break; | |
403 | case PRO_REGISTER: | |
404 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
405 | ret = 0; | |
406 | break; | |
407 | case PRO_REGISTER_AND_MOVE: | |
408 | case PRO_RESERVE: | |
409 | ret = 1; | |
410 | break; | |
411 | case PRO_RELEASE: | |
412 | ret = (registered_nexus) ? 0 : 1; | |
413 | break; | |
414 | default: | |
415 | printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service" | |
416 | " action: 0x%02x\n", cdb[1] & 0x1f); | |
417 | return -1; | |
418 | } | |
419 | break; | |
420 | case RELEASE: | |
421 | case RELEASE_10: | |
422 | /* Handled by CRH=1 in core_scsi2_emulate_crh() */ | |
423 | ret = 0; | |
424 | break; | |
425 | case RESERVE: | |
426 | case RESERVE_10: | |
427 | /* Handled by CRH=1 in core_scsi2_emulate_crh() */ | |
428 | ret = 0; | |
429 | break; | |
430 | case TEST_UNIT_READY: | |
431 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
432 | break; | |
433 | case MAINTENANCE_IN: | |
434 | switch (cdb[1] & 0x1f) { | |
435 | case MI_MANAGEMENT_PROTOCOL_IN: | |
436 | if (registered_nexus) { | |
437 | ret = 0; | |
438 | break; | |
439 | } | |
440 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
441 | break; | |
442 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
443 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
444 | if (legacy) { | |
445 | ret = 1; | |
446 | break; | |
447 | } | |
448 | if (registered_nexus) { | |
449 | ret = 0; | |
450 | break; | |
451 | } | |
452 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
453 | break; | |
454 | case MI_REPORT_ALIASES: | |
455 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
456 | case MI_REPORT_PRIORITY: | |
457 | case MI_REPORT_TARGET_PGS: | |
458 | case MI_REPORT_TIMESTAMP: | |
459 | ret = 0; /* Allowed */ | |
460 | break; | |
461 | default: | |
462 | printk(KERN_ERR "Unknown MI Service Action: 0x%02x\n", | |
463 | (cdb[1] & 0x1f)); | |
464 | return -1; | |
465 | } | |
466 | break; | |
467 | case ACCESS_CONTROL_IN: | |
468 | case ACCESS_CONTROL_OUT: | |
469 | case INQUIRY: | |
470 | case LOG_SENSE: | |
471 | case READ_MEDIA_SERIAL_NUMBER: | |
472 | case REPORT_LUNS: | |
473 | case REQUEST_SENSE: | |
474 | ret = 0; /*/ Allowed CDBs */ | |
475 | break; | |
476 | default: | |
477 | other_cdb = 1; | |
478 | break; | |
479 | } | |
480 | /* | |
481 | * Case where the CDB is explictly allowed in the above switch | |
482 | * statement. | |
483 | */ | |
484 | if (!(ret) && !(other_cdb)) { | |
485 | #if 0 | |
486 | printk(KERN_INFO "Allowing explict CDB: 0x%02x for %s" | |
487 | " reservation holder\n", cdb[0], | |
488 | core_scsi3_pr_dump_type(pr_reg_type)); | |
489 | #endif | |
490 | return ret; | |
491 | } | |
492 | /* | |
493 | * Check if write exclusive initiator ports *NOT* holding the | |
494 | * WRITE_EXCLUSIVE_* reservation. | |
495 | */ | |
496 | if ((we) && !(registered_nexus)) { | |
497 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
498 | /* | |
499 | * Conflict for write exclusive | |
500 | */ | |
501 | printk(KERN_INFO "%s Conflict for unregistered nexus" | |
502 | " %s CDB: 0x%02x to %s reservation\n", | |
503 | transport_dump_cmd_direction(cmd), | |
504 | se_sess->se_node_acl->initiatorname, cdb[0], | |
505 | core_scsi3_pr_dump_type(pr_reg_type)); | |
506 | return 1; | |
507 | } else { | |
508 | /* | |
509 | * Allow non WRITE CDBs for all Write Exclusive | |
510 | * PR TYPEs to pass for registered and | |
511 | * non-registered_nexuxes NOT holding the reservation. | |
512 | * | |
513 | * We only make noise for the unregisterd nexuses, | |
514 | * as we expect registered non-reservation holding | |
515 | * nexuses to issue CDBs. | |
516 | */ | |
517 | #if 0 | |
518 | if (!(registered_nexus)) { | |
519 | printk(KERN_INFO "Allowing implict CDB: 0x%02x" | |
520 | " for %s reservation on unregistered" | |
521 | " nexus\n", cdb[0], | |
522 | core_scsi3_pr_dump_type(pr_reg_type)); | |
523 | } | |
524 | #endif | |
525 | return 0; | |
526 | } | |
527 | } else if ((reg_only) || (all_reg)) { | |
528 | if (registered_nexus) { | |
529 | /* | |
530 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
531 | * allow commands from registered nexuses. | |
532 | */ | |
533 | #if 0 | |
534 | printk(KERN_INFO "Allowing implict CDB: 0x%02x for %s" | |
535 | " reservation\n", cdb[0], | |
536 | core_scsi3_pr_dump_type(pr_reg_type)); | |
537 | #endif | |
538 | return 0; | |
539 | } | |
540 | } | |
541 | printk(KERN_INFO "%s Conflict for %sregistered nexus %s CDB: 0x%2x" | |
542 | " for %s reservation\n", transport_dump_cmd_direction(cmd), | |
543 | (registered_nexus) ? "" : "un", | |
544 | se_sess->se_node_acl->initiatorname, cdb[0], | |
545 | core_scsi3_pr_dump_type(pr_reg_type)); | |
546 | ||
547 | return 1; /* Conflict by default */ | |
548 | } | |
549 | ||
550 | static u32 core_scsi3_pr_generation(struct se_device *dev) | |
551 | { | |
552 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
553 | u32 prg; | |
554 | /* | |
555 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
556 | * counter mainted by the device server. | |
557 | * | |
558 | * Note that this is done regardless of Active Persist across | |
559 | * Target PowerLoss (APTPL) | |
560 | * | |
561 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
562 | */ | |
563 | spin_lock(&dev->dev_reservation_lock); | |
564 | prg = T10_RES(su_dev)->pr_generation++; | |
565 | spin_unlock(&dev->dev_reservation_lock); | |
566 | ||
567 | return prg; | |
568 | } | |
569 | ||
570 | static int core_scsi3_pr_reservation_check( | |
571 | struct se_cmd *cmd, | |
572 | u32 *pr_reg_type) | |
573 | { | |
574 | struct se_device *dev = cmd->se_dev; | |
575 | struct se_session *sess = cmd->se_sess; | |
576 | int ret; | |
577 | ||
578 | if (!(sess)) | |
579 | return 0; | |
580 | /* | |
581 | * A legacy SPC-2 reservation is being held. | |
582 | */ | |
583 | if (dev->dev_flags & DF_SPC2_RESERVATIONS) | |
584 | return core_scsi2_reservation_check(cmd, pr_reg_type); | |
585 | ||
586 | spin_lock(&dev->dev_reservation_lock); | |
587 | if (!(dev->dev_pr_res_holder)) { | |
588 | spin_unlock(&dev->dev_reservation_lock); | |
589 | return 0; | |
590 | } | |
591 | *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
592 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
593 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { | |
594 | spin_unlock(&dev->dev_reservation_lock); | |
595 | return -1; | |
596 | } | |
597 | if (!(dev->dev_pr_res_holder->isid_present_at_reg)) { | |
598 | spin_unlock(&dev->dev_reservation_lock); | |
599 | return 0; | |
600 | } | |
601 | ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == | |
602 | sess->sess_bin_isid) ? 0 : -1; | |
603 | /* | |
604 | * Use bit in *pr_reg_type to notify ISID mismatch in | |
605 | * core_scsi3_pr_seq_non_holder(). | |
606 | */ | |
607 | if (ret != 0) | |
608 | *pr_reg_type |= 0x80000000; | |
609 | spin_unlock(&dev->dev_reservation_lock); | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
614 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( | |
615 | struct se_device *dev, | |
616 | struct se_node_acl *nacl, | |
617 | struct se_dev_entry *deve, | |
618 | unsigned char *isid, | |
619 | u64 sa_res_key, | |
620 | int all_tg_pt, | |
621 | int aptpl) | |
622 | { | |
623 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
624 | struct t10_pr_registration *pr_reg; | |
625 | ||
626 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
627 | if (!(pr_reg)) { | |
628 | printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n"); | |
629 | return NULL; | |
630 | } | |
631 | ||
632 | pr_reg->pr_aptpl_buf = kzalloc(T10_RES(su_dev)->pr_aptpl_buf_len, | |
633 | GFP_ATOMIC); | |
634 | if (!(pr_reg->pr_aptpl_buf)) { | |
635 | printk(KERN_ERR "Unable to allocate pr_reg->pr_aptpl_buf\n"); | |
636 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
637 | return NULL; | |
638 | } | |
639 | ||
640 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
641 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
642 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
643 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
644 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
645 | atomic_set(&pr_reg->pr_res_holders, 0); | |
646 | pr_reg->pr_reg_nacl = nacl; | |
647 | pr_reg->pr_reg_deve = deve; | |
648 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
649 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
650 | pr_reg->pr_res_key = sa_res_key; | |
651 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
652 | pr_reg->pr_reg_aptpl = aptpl; | |
653 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
654 | /* | |
655 | * If an ISID value for this SCSI Initiator Port exists, | |
656 | * save it to the registration now. | |
657 | */ | |
658 | if (isid != NULL) { | |
659 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
660 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
661 | pr_reg->isid_present_at_reg = 1; | |
662 | } | |
663 | ||
664 | return pr_reg; | |
665 | } | |
666 | ||
667 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
668 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
669 | ||
670 | /* | |
671 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
672 | * modes. | |
673 | */ | |
674 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
675 | struct se_device *dev, | |
676 | struct se_node_acl *nacl, | |
677 | struct se_dev_entry *deve, | |
678 | unsigned char *isid, | |
679 | u64 sa_res_key, | |
680 | int all_tg_pt, | |
681 | int aptpl) | |
682 | { | |
683 | struct se_dev_entry *deve_tmp; | |
684 | struct se_node_acl *nacl_tmp; | |
685 | struct se_port *port, *port_tmp; | |
686 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
687 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; | |
688 | int ret; | |
689 | /* | |
690 | * Create a registration for the I_T Nexus upon which the | |
691 | * PROUT REGISTER was received. | |
692 | */ | |
693 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
694 | sa_res_key, all_tg_pt, aptpl); | |
695 | if (!(pr_reg)) | |
696 | return NULL; | |
697 | /* | |
698 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
699 | */ | |
700 | if (!(all_tg_pt)) | |
701 | return pr_reg; | |
702 | /* | |
703 | * Create list of matching SCSI Initiator Port registrations | |
704 | * for ALL_TG_PT=1 | |
705 | */ | |
706 | spin_lock(&dev->se_port_lock); | |
707 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
708 | atomic_inc(&port->sep_tg_pt_ref_cnt); | |
709 | smp_mb__after_atomic_inc(); | |
710 | spin_unlock(&dev->se_port_lock); | |
711 | ||
712 | spin_lock_bh(&port->sep_alua_lock); | |
713 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
714 | alua_port_list) { | |
715 | /* | |
716 | * This pointer will be NULL for demo mode MappedLUNs | |
717 | * that have not been make explict via a ConfigFS | |
718 | * MappedLUN group for the SCSI Initiator Node ACL. | |
719 | */ | |
720 | if (!(deve_tmp->se_lun_acl)) | |
721 | continue; | |
722 | ||
723 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
724 | /* | |
725 | * Skip the matching struct se_node_acl that is allocated | |
726 | * above.. | |
727 | */ | |
728 | if (nacl == nacl_tmp) | |
729 | continue; | |
730 | /* | |
731 | * Only perform PR registrations for target ports on | |
732 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
733 | * arrived. | |
734 | */ | |
735 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
736 | continue; | |
737 | /* | |
738 | * Look for a matching Initiator Node ACL in ASCII format | |
739 | */ | |
740 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
741 | continue; | |
742 | ||
743 | atomic_inc(&deve_tmp->pr_ref_count); | |
744 | smp_mb__after_atomic_inc(); | |
745 | spin_unlock_bh(&port->sep_alua_lock); | |
746 | /* | |
747 | * Grab a configfs group dependency that is released | |
748 | * for the exception path at label out: below, or upon | |
749 | * completion of adding ALL_TG_PT=1 registrations in | |
750 | * __core_scsi3_add_registration() | |
751 | */ | |
752 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
753 | if (ret < 0) { | |
754 | printk(KERN_ERR "core_scsi3_lunacl_depend" | |
755 | "_item() failed\n"); | |
756 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
757 | smp_mb__after_atomic_dec(); | |
758 | atomic_dec(&deve_tmp->pr_ref_count); | |
759 | smp_mb__after_atomic_dec(); | |
760 | goto out; | |
761 | } | |
762 | /* | |
763 | * Located a matching SCSI Initiator Port on a different | |
764 | * port, allocate the pr_reg_atp and attach it to the | |
765 | * pr_reg->pr_reg_atp_list that will be processed once | |
766 | * the original *pr_reg is processed in | |
767 | * __core_scsi3_add_registration() | |
768 | */ | |
769 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
770 | nacl_tmp, deve_tmp, NULL, | |
771 | sa_res_key, all_tg_pt, aptpl); | |
772 | if (!(pr_reg_atp)) { | |
773 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
774 | smp_mb__after_atomic_dec(); | |
775 | atomic_dec(&deve_tmp->pr_ref_count); | |
776 | smp_mb__after_atomic_dec(); | |
777 | core_scsi3_lunacl_undepend_item(deve_tmp); | |
778 | goto out; | |
779 | } | |
780 | ||
781 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
782 | &pr_reg->pr_reg_atp_list); | |
783 | spin_lock_bh(&port->sep_alua_lock); | |
784 | } | |
785 | spin_unlock_bh(&port->sep_alua_lock); | |
786 | ||
787 | spin_lock(&dev->se_port_lock); | |
788 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
789 | smp_mb__after_atomic_dec(); | |
790 | } | |
791 | spin_unlock(&dev->se_port_lock); | |
792 | ||
793 | return pr_reg; | |
794 | out: | |
795 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
796 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
797 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
798 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
799 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
800 | } | |
801 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
802 | return NULL; | |
803 | } | |
804 | ||
805 | int core_scsi3_alloc_aptpl_registration( | |
806 | struct t10_reservation_template *pr_tmpl, | |
807 | u64 sa_res_key, | |
808 | unsigned char *i_port, | |
809 | unsigned char *isid, | |
810 | u32 mapped_lun, | |
811 | unsigned char *t_port, | |
812 | u16 tpgt, | |
813 | u32 target_lun, | |
814 | int res_holder, | |
815 | int all_tg_pt, | |
816 | u8 type) | |
817 | { | |
818 | struct t10_pr_registration *pr_reg; | |
819 | ||
820 | if (!(i_port) || !(t_port) || !(sa_res_key)) { | |
821 | printk(KERN_ERR "Illegal parameters for APTPL registration\n"); | |
822 | return -1; | |
823 | } | |
824 | ||
825 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
826 | if (!(pr_reg)) { | |
827 | printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n"); | |
828 | return -1; | |
829 | } | |
830 | pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); | |
831 | ||
832 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
833 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
834 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
835 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
836 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
837 | atomic_set(&pr_reg->pr_res_holders, 0); | |
838 | pr_reg->pr_reg_nacl = NULL; | |
839 | pr_reg->pr_reg_deve = NULL; | |
840 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
841 | pr_reg->pr_aptpl_target_lun = target_lun; | |
842 | pr_reg->pr_res_key = sa_res_key; | |
843 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
844 | pr_reg->pr_reg_aptpl = 1; | |
845 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
846 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
847 | pr_reg->pr_res_type = type; | |
848 | /* | |
849 | * If an ISID value had been saved in APTPL metadata for this | |
850 | * SCSI Initiator Port, restore it now. | |
851 | */ | |
852 | if (isid != NULL) { | |
853 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
854 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
855 | pr_reg->isid_present_at_reg = 1; | |
856 | } | |
857 | /* | |
858 | * Copy the i_port and t_port information from caller. | |
859 | */ | |
860 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
861 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
862 | pr_reg->pr_reg_tpgt = tpgt; | |
863 | /* | |
864 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
865 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
866 | * the Initiator Node LUN ACL from the fabric module is created for | |
867 | * this registration. | |
868 | */ | |
869 | pr_reg->pr_res_holder = res_holder; | |
870 | ||
871 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
872 | printk(KERN_INFO "SPC-3 PR APTPL Successfully added registration%s from" | |
873 | " metadata\n", (res_holder) ? "+reservation" : ""); | |
874 | return 0; | |
875 | } | |
876 | ||
877 | static void core_scsi3_aptpl_reserve( | |
878 | struct se_device *dev, | |
879 | struct se_portal_group *tpg, | |
880 | struct se_node_acl *node_acl, | |
881 | struct t10_pr_registration *pr_reg) | |
882 | { | |
883 | char i_buf[PR_REG_ISID_ID_LEN]; | |
884 | int prf_isid; | |
885 | ||
886 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
887 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
888 | PR_REG_ISID_ID_LEN); | |
889 | ||
890 | spin_lock(&dev->dev_reservation_lock); | |
891 | dev->dev_pr_res_holder = pr_reg; | |
892 | spin_unlock(&dev->dev_reservation_lock); | |
893 | ||
894 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: APTPL RESERVE created" | |
895 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
896 | TPG_TFO(tpg)->get_fabric_name(), | |
897 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
898 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
899 | printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n", | |
900 | TPG_TFO(tpg)->get_fabric_name(), node_acl->initiatorname, | |
901 | (prf_isid) ? &i_buf[0] : ""); | |
902 | } | |
903 | ||
904 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
905 | struct t10_pr_registration *, int, int); | |
906 | ||
907 | static int __core_scsi3_check_aptpl_registration( | |
908 | struct se_device *dev, | |
909 | struct se_portal_group *tpg, | |
910 | struct se_lun *lun, | |
911 | u32 target_lun, | |
912 | struct se_node_acl *nacl, | |
913 | struct se_dev_entry *deve) | |
914 | { | |
915 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
916 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
917 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; | |
918 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
919 | u16 tpgt; | |
920 | ||
921 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
922 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
923 | /* | |
924 | * Copy Initiator Port information from struct se_node_acl | |
925 | */ | |
926 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
927 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
928 | TPG_TFO(tpg)->tpg_get_wwn(tpg)); | |
929 | tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg); | |
930 | /* | |
931 | * Look for the matching registrations+reservation from those | |
932 | * created from APTPL metadata. Note that multiple registrations | |
933 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
934 | * TransportIDs. | |
935 | */ | |
936 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
937 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
938 | pr_reg_aptpl_list) { | |
939 | if (!(strcmp(pr_reg->pr_iport, i_port)) && | |
940 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && | |
941 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
942 | (pr_reg->pr_reg_tpgt == tpgt) && | |
943 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
944 | ||
945 | pr_reg->pr_reg_nacl = nacl; | |
946 | pr_reg->pr_reg_deve = deve; | |
947 | pr_reg->pr_reg_tg_pt_lun = lun; | |
948 | ||
949 | list_del(&pr_reg->pr_reg_aptpl_list); | |
950 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
951 | /* | |
952 | * At this point all of the pointers in *pr_reg will | |
953 | * be setup, so go ahead and add the registration. | |
954 | */ | |
955 | ||
956 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
957 | /* | |
958 | * If this registration is the reservation holder, | |
959 | * make that happen now.. | |
960 | */ | |
961 | if (pr_reg->pr_res_holder) | |
962 | core_scsi3_aptpl_reserve(dev, tpg, | |
963 | nacl, pr_reg); | |
964 | /* | |
965 | * Reenable pr_aptpl_active to accept new metadata | |
966 | * updates once the SCSI device is active again.. | |
967 | */ | |
968 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
969 | pr_tmpl->pr_aptpl_active = 1; | |
970 | } | |
971 | } | |
972 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | int core_scsi3_check_aptpl_registration( | |
978 | struct se_device *dev, | |
979 | struct se_portal_group *tpg, | |
980 | struct se_lun *lun, | |
981 | struct se_lun_acl *lun_acl) | |
982 | { | |
983 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
984 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; | |
985 | struct se_dev_entry *deve = &nacl->device_list[lun_acl->mapped_lun]; | |
986 | ||
987 | if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) | |
988 | return 0; | |
989 | ||
990 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
991 | lun->unpacked_lun, nacl, deve); | |
992 | } | |
993 | ||
994 | static void __core_scsi3_dump_registration( | |
995 | struct target_core_fabric_ops *tfo, | |
996 | struct se_device *dev, | |
997 | struct se_node_acl *nacl, | |
998 | struct t10_pr_registration *pr_reg, | |
999 | int register_type) | |
1000 | { | |
1001 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1002 | char i_buf[PR_REG_ISID_ID_LEN]; | |
1003 | int prf_isid; | |
1004 | ||
1005 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
1006 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1007 | PR_REG_ISID_ID_LEN); | |
1008 | ||
1009 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER%s Initiator" | |
1010 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? | |
1011 | "_AND_MOVE" : (register_type == 1) ? | |
1012 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, | |
1013 | (prf_isid) ? i_buf : ""); | |
1014 | printk(KERN_INFO "SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", | |
1015 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), | |
1016 | tfo->tpg_get_tag(se_tpg)); | |
1017 | printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" | |
1018 | " Port(s)\n", tfo->get_fabric_name(), | |
1019 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
1020 | TRANSPORT(dev)->name); | |
1021 | printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" | |
1022 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), | |
1023 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1024 | pr_reg->pr_reg_aptpl); | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * this function can be called with struct se_device->dev_reservation_lock | |
1029 | * when register_move = 1 | |
1030 | */ | |
1031 | static void __core_scsi3_add_registration( | |
1032 | struct se_device *dev, | |
1033 | struct se_node_acl *nacl, | |
1034 | struct t10_pr_registration *pr_reg, | |
1035 | int register_type, | |
1036 | int register_move) | |
1037 | { | |
1038 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
1039 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
1040 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
1041 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
1042 | ||
1043 | /* | |
1044 | * Increment PRgeneration counter for struct se_device upon a successful | |
1045 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1046 | * | |
1047 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1048 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1049 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1050 | * for the REGISTER. | |
1051 | */ | |
1052 | pr_reg->pr_res_generation = (register_move) ? | |
1053 | T10_RES(su_dev)->pr_generation++ : | |
1054 | core_scsi3_pr_generation(dev); | |
1055 | ||
1056 | spin_lock(&pr_tmpl->registration_lock); | |
1057 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1058 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1059 | ||
1060 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1061 | spin_unlock(&pr_tmpl->registration_lock); | |
1062 | /* | |
1063 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1064 | */ | |
1065 | if (!(pr_reg->pr_reg_all_tg_pt) || (register_move)) | |
1066 | return; | |
1067 | /* | |
1068 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1069 | * allocated in __core_scsi3_alloc_registration() | |
1070 | */ | |
1071 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1072 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1073 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1074 | ||
1075 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1076 | ||
1077 | spin_lock(&pr_tmpl->registration_lock); | |
1078 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1079 | &pr_tmpl->registration_list); | |
1080 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1081 | ||
1082 | __core_scsi3_dump_registration(tfo, dev, | |
1083 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1084 | register_type); | |
1085 | spin_unlock(&pr_tmpl->registration_lock); | |
1086 | /* | |
1087 | * Drop configfs group dependency reference from | |
1088 | * __core_scsi3_alloc_registration() | |
1089 | */ | |
1090 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | static int core_scsi3_alloc_registration( | |
1095 | struct se_device *dev, | |
1096 | struct se_node_acl *nacl, | |
1097 | struct se_dev_entry *deve, | |
1098 | unsigned char *isid, | |
1099 | u64 sa_res_key, | |
1100 | int all_tg_pt, | |
1101 | int aptpl, | |
1102 | int register_type, | |
1103 | int register_move) | |
1104 | { | |
1105 | struct t10_pr_registration *pr_reg; | |
1106 | ||
1107 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1108 | sa_res_key, all_tg_pt, aptpl); | |
1109 | if (!(pr_reg)) | |
1110 | return -1; | |
1111 | ||
1112 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1113 | register_type, register_move); | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1118 | struct se_device *dev, | |
1119 | struct se_node_acl *nacl, | |
1120 | unsigned char *isid) | |
1121 | { | |
1122 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
1123 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
1124 | struct se_portal_group *tpg; | |
1125 | ||
1126 | spin_lock(&pr_tmpl->registration_lock); | |
1127 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1128 | &pr_tmpl->registration_list, pr_reg_list) { | |
1129 | /* | |
1130 | * First look for a matching struct se_node_acl | |
1131 | */ | |
1132 | if (pr_reg->pr_reg_nacl != nacl) | |
1133 | continue; | |
1134 | ||
1135 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1136 | /* | |
1137 | * If this registration does NOT contain a fabric provided | |
1138 | * ISID, then we have found a match. | |
1139 | */ | |
1140 | if (!(pr_reg->isid_present_at_reg)) { | |
1141 | /* | |
1142 | * Determine if this SCSI device server requires that | |
1143 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1144 | * for fabric modules (iSCSI) requiring them. | |
1145 | */ | |
1146 | if (TPG_TFO(tpg)->sess_get_initiator_sid != NULL) { | |
1147 | if (DEV_ATTRIB(dev)->enforce_pr_isids) | |
1148 | continue; | |
1149 | } | |
1150 | atomic_inc(&pr_reg->pr_res_holders); | |
1151 | smp_mb__after_atomic_inc(); | |
1152 | spin_unlock(&pr_tmpl->registration_lock); | |
1153 | return pr_reg; | |
1154 | } | |
1155 | /* | |
1156 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1157 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1158 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1159 | */ | |
1160 | if (!(isid)) | |
1161 | continue; | |
1162 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1163 | continue; | |
1164 | ||
1165 | atomic_inc(&pr_reg->pr_res_holders); | |
1166 | smp_mb__after_atomic_inc(); | |
1167 | spin_unlock(&pr_tmpl->registration_lock); | |
1168 | return pr_reg; | |
1169 | } | |
1170 | spin_unlock(&pr_tmpl->registration_lock); | |
1171 | ||
1172 | return NULL; | |
1173 | } | |
1174 | ||
1175 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1176 | struct se_device *dev, | |
1177 | struct se_node_acl *nacl, | |
1178 | struct se_session *sess) | |
1179 | { | |
1180 | struct se_portal_group *tpg = nacl->se_tpg; | |
1181 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1182 | ||
1183 | if (TPG_TFO(tpg)->sess_get_initiator_sid != NULL) { | |
1184 | memset(&buf[0], 0, PR_REG_ISID_LEN); | |
1185 | TPG_TFO(tpg)->sess_get_initiator_sid(sess, &buf[0], | |
1186 | PR_REG_ISID_LEN); | |
1187 | isid_ptr = &buf[0]; | |
1188 | } | |
1189 | ||
1190 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1191 | } | |
1192 | ||
1193 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1194 | { | |
1195 | atomic_dec(&pr_reg->pr_res_holders); | |
1196 | smp_mb__after_atomic_dec(); | |
1197 | } | |
1198 | ||
1199 | static int core_scsi3_check_implict_release( | |
1200 | struct se_device *dev, | |
1201 | struct t10_pr_registration *pr_reg) | |
1202 | { | |
1203 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1204 | struct t10_pr_registration *pr_res_holder; | |
1205 | int ret = 0; | |
1206 | ||
1207 | spin_lock(&dev->dev_reservation_lock); | |
1208 | pr_res_holder = dev->dev_pr_res_holder; | |
1209 | if (!(pr_res_holder)) { | |
1210 | spin_unlock(&dev->dev_reservation_lock); | |
1211 | return ret; | |
1212 | } | |
1213 | if (pr_res_holder == pr_reg) { | |
1214 | /* | |
1215 | * Perform an implict RELEASE if the registration that | |
1216 | * is being released is holding the reservation. | |
1217 | * | |
1218 | * From spc4r17, section 5.7.11.1: | |
1219 | * | |
1220 | * e) If the I_T nexus is the persistent reservation holder | |
1221 | * and the persistent reservation is not an all registrants | |
1222 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1223 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1224 | * service action with the SERVICE ACTION RESERVATION KEY | |
1225 | * field set to zero (see 5.7.11.3). | |
1226 | */ | |
1227 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); | |
1228 | ret = 1; | |
1229 | /* | |
1230 | * For 'All Registrants' reservation types, all existing | |
1231 | * registrations are still processed as reservation holders | |
1232 | * in core_scsi3_pr_seq_non_holder() after the initial | |
1233 | * reservation holder is implictly released here. | |
1234 | */ | |
1235 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1236 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1237 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1238 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
1239 | printk(KERN_ERR "SPC-3 PR: Unable to perform ALL_TG_PT=1" | |
1240 | " UNREGISTER while existing reservation with matching" | |
1241 | " key 0x%016Lx is present from another SCSI Initiator" | |
1242 | " Port\n", pr_reg->pr_res_key); | |
1243 | ret = -1; | |
1244 | } | |
1245 | spin_unlock(&dev->dev_reservation_lock); | |
1246 | ||
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * Called with struct t10_reservation_template->registration_lock held. | |
1252 | */ | |
1253 | static void __core_scsi3_free_registration( | |
1254 | struct se_device *dev, | |
1255 | struct t10_pr_registration *pr_reg, | |
1256 | struct list_head *preempt_and_abort_list, | |
1257 | int dec_holders) | |
1258 | { | |
1259 | struct target_core_fabric_ops *tfo = | |
1260 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; | |
1261 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
1262 | char i_buf[PR_REG_ISID_ID_LEN]; | |
1263 | int prf_isid; | |
1264 | ||
1265 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1266 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1267 | PR_REG_ISID_ID_LEN); | |
1268 | ||
1269 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1270 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
1271 | list_del(&pr_reg->pr_reg_list); | |
1272 | /* | |
1273 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1274 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1275 | */ | |
1276 | if (dec_holders) | |
1277 | core_scsi3_put_pr_reg(pr_reg); | |
1278 | /* | |
1279 | * Wait until all reference from any other I_T nexuses for this | |
1280 | * *pr_reg have been released. Because list_del() is called above, | |
1281 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1282 | * count back to zero, and we release *pr_reg. | |
1283 | */ | |
1284 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1285 | spin_unlock(&pr_tmpl->registration_lock); | |
1286 | printk("SPC-3 PR [%s] waiting for pr_res_holders\n", | |
1287 | tfo->get_fabric_name()); | |
1288 | cpu_relax(); | |
1289 | spin_lock(&pr_tmpl->registration_lock); | |
1290 | } | |
1291 | ||
1292 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: UNREGISTER Initiator" | |
1293 | " Node: %s%s\n", tfo->get_fabric_name(), | |
1294 | pr_reg->pr_reg_nacl->initiatorname, | |
1295 | (prf_isid) ? &i_buf[0] : ""); | |
1296 | printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" | |
1297 | " Port(s)\n", tfo->get_fabric_name(), | |
1298 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
1299 | TRANSPORT(dev)->name); | |
1300 | printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" | |
1301 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, | |
1302 | pr_reg->pr_res_generation); | |
1303 | ||
1304 | if (!(preempt_and_abort_list)) { | |
1305 | pr_reg->pr_reg_deve = NULL; | |
1306 | pr_reg->pr_reg_nacl = NULL; | |
1307 | kfree(pr_reg->pr_aptpl_buf); | |
1308 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1309 | return; | |
1310 | } | |
1311 | /* | |
1312 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1313 | * are released once the ABORT_TASK_SET has completed.. | |
1314 | */ | |
1315 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1316 | } | |
1317 | ||
1318 | void core_scsi3_free_pr_reg_from_nacl( | |
1319 | struct se_device *dev, | |
1320 | struct se_node_acl *nacl) | |
1321 | { | |
1322 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
1323 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; | |
1324 | /* | |
1325 | * If the passed se_node_acl matches the reservation holder, | |
1326 | * release the reservation. | |
1327 | */ | |
1328 | spin_lock(&dev->dev_reservation_lock); | |
1329 | pr_res_holder = dev->dev_pr_res_holder; | |
1330 | if ((pr_res_holder != NULL) && | |
1331 | (pr_res_holder->pr_reg_nacl == nacl)) | |
1332 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); | |
1333 | spin_unlock(&dev->dev_reservation_lock); | |
1334 | /* | |
1335 | * Release any registration associated with the struct se_node_acl. | |
1336 | */ | |
1337 | spin_lock(&pr_tmpl->registration_lock); | |
1338 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1339 | &pr_tmpl->registration_list, pr_reg_list) { | |
1340 | ||
1341 | if (pr_reg->pr_reg_nacl != nacl) | |
1342 | continue; | |
1343 | ||
1344 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1345 | } | |
1346 | spin_unlock(&pr_tmpl->registration_lock); | |
1347 | } | |
1348 | ||
1349 | void core_scsi3_free_all_registrations( | |
1350 | struct se_device *dev) | |
1351 | { | |
1352 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
1353 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; | |
1354 | ||
1355 | spin_lock(&dev->dev_reservation_lock); | |
1356 | pr_res_holder = dev->dev_pr_res_holder; | |
1357 | if (pr_res_holder != NULL) { | |
1358 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1359 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
1360 | pr_res_holder, 0); | |
1361 | } | |
1362 | spin_unlock(&dev->dev_reservation_lock); | |
1363 | ||
1364 | spin_lock(&pr_tmpl->registration_lock); | |
1365 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1366 | &pr_tmpl->registration_list, pr_reg_list) { | |
1367 | ||
1368 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1369 | } | |
1370 | spin_unlock(&pr_tmpl->registration_lock); | |
1371 | ||
1372 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1373 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1374 | pr_reg_aptpl_list) { | |
1375 | list_del(&pr_reg->pr_reg_aptpl_list); | |
1376 | kfree(pr_reg->pr_aptpl_buf); | |
1377 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1378 | } | |
1379 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1380 | } | |
1381 | ||
1382 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1383 | { | |
1384 | return configfs_depend_item(TPG_TFO(tpg)->tf_subsys, | |
1385 | &tpg->tpg_group.cg_item); | |
1386 | } | |
1387 | ||
1388 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1389 | { | |
1390 | configfs_undepend_item(TPG_TFO(tpg)->tf_subsys, | |
1391 | &tpg->tpg_group.cg_item); | |
1392 | ||
1393 | atomic_dec(&tpg->tpg_pr_ref_count); | |
1394 | smp_mb__after_atomic_dec(); | |
1395 | } | |
1396 | ||
1397 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1398 | { | |
1399 | struct se_portal_group *tpg = nacl->se_tpg; | |
1400 | ||
1401 | if (nacl->dynamic_node_acl) | |
1402 | return 0; | |
1403 | ||
1404 | return configfs_depend_item(TPG_TFO(tpg)->tf_subsys, | |
1405 | &nacl->acl_group.cg_item); | |
1406 | } | |
1407 | ||
1408 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1409 | { | |
1410 | struct se_portal_group *tpg = nacl->se_tpg; | |
1411 | ||
1412 | if (nacl->dynamic_node_acl) { | |
1413 | atomic_dec(&nacl->acl_pr_ref_count); | |
1414 | smp_mb__after_atomic_dec(); | |
1415 | return; | |
1416 | } | |
1417 | ||
1418 | configfs_undepend_item(TPG_TFO(tpg)->tf_subsys, | |
1419 | &nacl->acl_group.cg_item); | |
1420 | ||
1421 | atomic_dec(&nacl->acl_pr_ref_count); | |
1422 | smp_mb__after_atomic_dec(); | |
1423 | } | |
1424 | ||
1425 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1426 | { | |
1427 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1428 | struct se_node_acl *nacl; | |
1429 | struct se_portal_group *tpg; | |
1430 | /* | |
1431 | * For nacl->dynamic_node_acl=1 | |
1432 | */ | |
1433 | if (!(lun_acl)) | |
1434 | return 0; | |
1435 | ||
1436 | nacl = lun_acl->se_lun_nacl; | |
1437 | tpg = nacl->se_tpg; | |
1438 | ||
1439 | return configfs_depend_item(TPG_TFO(tpg)->tf_subsys, | |
1440 | &lun_acl->se_lun_group.cg_item); | |
1441 | } | |
1442 | ||
1443 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1444 | { | |
1445 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1446 | struct se_node_acl *nacl; | |
1447 | struct se_portal_group *tpg; | |
1448 | /* | |
1449 | * For nacl->dynamic_node_acl=1 | |
1450 | */ | |
1451 | if (!(lun_acl)) { | |
1452 | atomic_dec(&se_deve->pr_ref_count); | |
1453 | smp_mb__after_atomic_dec(); | |
1454 | return; | |
1455 | } | |
1456 | nacl = lun_acl->se_lun_nacl; | |
1457 | tpg = nacl->se_tpg; | |
1458 | ||
1459 | configfs_undepend_item(TPG_TFO(tpg)->tf_subsys, | |
1460 | &lun_acl->se_lun_group.cg_item); | |
1461 | ||
1462 | atomic_dec(&se_deve->pr_ref_count); | |
1463 | smp_mb__after_atomic_dec(); | |
1464 | } | |
1465 | ||
1466 | static int core_scsi3_decode_spec_i_port( | |
1467 | struct se_cmd *cmd, | |
1468 | struct se_portal_group *tpg, | |
1469 | unsigned char *l_isid, | |
1470 | u64 sa_res_key, | |
1471 | int all_tg_pt, | |
1472 | int aptpl) | |
1473 | { | |
1474 | struct se_device *dev = SE_DEV(cmd); | |
1475 | struct se_port *tmp_port; | |
1476 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
1477 | struct se_session *se_sess = SE_SESS(cmd); | |
1478 | struct se_node_acl *dest_node_acl = NULL; | |
1479 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1480 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1481 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
1482 | struct list_head tid_dest_list; | |
1483 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; | |
1484 | struct target_core_fabric_ops *tmp_tf_ops; | |
1485 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
1486 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; | |
1487 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
1488 | u32 tpdl, tid_len = 0; | |
1489 | int ret, dest_local_nexus, prf_isid; | |
1490 | u32 dest_rtpi = 0; | |
1491 | ||
1492 | memset(dest_iport, 0, 64); | |
1493 | INIT_LIST_HEAD(&tid_dest_list); | |
1494 | ||
1495 | local_se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
1496 | /* | |
1497 | * Allocate a struct pr_transport_id_holder and setup the | |
1498 | * local_node_acl and local_se_deve pointers and add to | |
1499 | * struct list_head tid_dest_list for add registration | |
1500 | * processing in the loop of tid_dest_list below. | |
1501 | */ | |
1502 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
1503 | if (!(tidh_new)) { | |
1504 | printk(KERN_ERR "Unable to allocate tidh_new\n"); | |
1505 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
1506 | } | |
1507 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1508 | tidh_new->dest_tpg = tpg; | |
1509 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1510 | tidh_new->dest_se_deve = local_se_deve; | |
1511 | ||
1512 | local_pr_reg = __core_scsi3_alloc_registration(SE_DEV(cmd), | |
1513 | se_sess->se_node_acl, local_se_deve, l_isid, | |
1514 | sa_res_key, all_tg_pt, aptpl); | |
1515 | if (!(local_pr_reg)) { | |
1516 | kfree(tidh_new); | |
1517 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
1518 | } | |
1519 | tidh_new->dest_pr_reg = local_pr_reg; | |
1520 | /* | |
1521 | * The local I_T nexus does not hold any configfs dependances, | |
1522 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1523 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1524 | */ | |
1525 | tidh_new->dest_local_nexus = 1; | |
1526 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1527 | /* | |
1528 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1529 | * first extract TransportID Parameter Data Length, and make sure | |
1530 | * the value matches up to the SCSI expected data transfer length. | |
1531 | */ | |
1532 | tpdl = (buf[24] & 0xff) << 24; | |
1533 | tpdl |= (buf[25] & 0xff) << 16; | |
1534 | tpdl |= (buf[26] & 0xff) << 8; | |
1535 | tpdl |= buf[27] & 0xff; | |
1536 | ||
1537 | if ((tpdl + 28) != cmd->data_length) { | |
1538 | printk(KERN_ERR "SPC-3 PR: Illegal tpdl: %u + 28 byte header" | |
1539 | " does not equal CDB data_length: %u\n", tpdl, | |
1540 | cmd->data_length); | |
1541 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
1542 | goto out; | |
1543 | } | |
1544 | /* | |
1545 | * Start processing the received transport IDs using the | |
1546 | * receiving I_T Nexus portal's fabric dependent methods to | |
1547 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1548 | */ | |
1549 | ptr = &buf[28]; | |
1550 | ||
1551 | while (tpdl > 0) { | |
1552 | proto_ident = (ptr[0] & 0x0f); | |
1553 | dest_tpg = NULL; | |
1554 | ||
1555 | spin_lock(&dev->se_port_lock); | |
1556 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1557 | tmp_tpg = tmp_port->sep_tpg; | |
1558 | if (!(tmp_tpg)) | |
1559 | continue; | |
1560 | tmp_tf_ops = TPG_TFO(tmp_tpg); | |
1561 | if (!(tmp_tf_ops)) | |
1562 | continue; | |
1563 | if (!(tmp_tf_ops->get_fabric_proto_ident) || | |
1564 | !(tmp_tf_ops->tpg_parse_pr_out_transport_id)) | |
1565 | continue; | |
1566 | /* | |
1567 | * Look for the matching proto_ident provided by | |
1568 | * the received TransportID | |
1569 | */ | |
1570 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); | |
1571 | if (tmp_proto_ident != proto_ident) | |
1572 | continue; | |
1573 | dest_rtpi = tmp_port->sep_rtpi; | |
1574 | ||
1575 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( | |
1576 | tmp_tpg, (const char *)ptr, &tid_len, | |
1577 | &iport_ptr); | |
1578 | if (!(i_str)) | |
1579 | continue; | |
1580 | ||
1581 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); | |
1582 | smp_mb__after_atomic_inc(); | |
1583 | spin_unlock(&dev->se_port_lock); | |
1584 | ||
1585 | ret = core_scsi3_tpg_depend_item(tmp_tpg); | |
1586 | if (ret != 0) { | |
1587 | printk(KERN_ERR " core_scsi3_tpg_depend_item()" | |
1588 | " for tmp_tpg\n"); | |
1589 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); | |
1590 | smp_mb__after_atomic_dec(); | |
1591 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1592 | goto out; | |
1593 | } | |
1594 | /* | |
1595 | * Locate the desination initiator ACL to be registered | |
1596 | * from the decoded fabric module specific TransportID | |
1597 | * at *i_str. | |
1598 | */ | |
1599 | spin_lock_bh(&tmp_tpg->acl_node_lock); | |
1600 | dest_node_acl = __core_tpg_get_initiator_node_acl( | |
1601 | tmp_tpg, i_str); | |
1602 | if (dest_node_acl) { | |
1603 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
1604 | smp_mb__after_atomic_inc(); | |
1605 | } | |
1606 | spin_unlock_bh(&tmp_tpg->acl_node_lock); | |
1607 | ||
1608 | if (!(dest_node_acl)) { | |
1609 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
1610 | spin_lock(&dev->se_port_lock); | |
1611 | continue; | |
1612 | } | |
1613 | ||
1614 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
1615 | if (ret != 0) { | |
1616 | printk(KERN_ERR "configfs_depend_item() failed" | |
1617 | " for dest_node_acl->acl_group\n"); | |
1618 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
1619 | smp_mb__after_atomic_dec(); | |
1620 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
1621 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1622 | goto out; | |
1623 | } | |
1624 | ||
1625 | dest_tpg = tmp_tpg; | |
1626 | printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node:" | |
1627 | " %s Port RTPI: %hu\n", | |
1628 | TPG_TFO(dest_tpg)->get_fabric_name(), | |
1629 | dest_node_acl->initiatorname, dest_rtpi); | |
1630 | ||
1631 | spin_lock(&dev->se_port_lock); | |
1632 | break; | |
1633 | } | |
1634 | spin_unlock(&dev->se_port_lock); | |
1635 | ||
1636 | if (!(dest_tpg)) { | |
1637 | printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Unable to locate" | |
1638 | " dest_tpg\n"); | |
1639 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
1640 | goto out; | |
1641 | } | |
1642 | #if 0 | |
1643 | printk("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" | |
1644 | " tid_len: %d for %s + %s\n", | |
1645 | TPG_TFO(dest_tpg)->get_fabric_name(), cmd->data_length, | |
1646 | tpdl, tid_len, i_str, iport_ptr); | |
1647 | #endif | |
1648 | if (tid_len > tpdl) { | |
1649 | printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Illegal tid_len:" | |
1650 | " %u for Transport ID: %s\n", tid_len, ptr); | |
1651 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1652 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1653 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
1654 | goto out; | |
1655 | } | |
1656 | /* | |
1657 | * Locate the desintation struct se_dev_entry pointer for matching | |
1658 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1659 | * Target Port. | |
1660 | */ | |
1661 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1662 | dest_rtpi); | |
1663 | if (!(dest_se_deve)) { | |
1664 | printk(KERN_ERR "Unable to locate %s dest_se_deve" | |
1665 | " from destination RTPI: %hu\n", | |
1666 | TPG_TFO(dest_tpg)->get_fabric_name(), | |
1667 | dest_rtpi); | |
1668 | ||
1669 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1670 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1671 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
1672 | goto out; | |
1673 | } | |
1674 | ||
1675 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
1676 | if (ret < 0) { | |
1677 | printk(KERN_ERR "core_scsi3_lunacl_depend_item()" | |
1678 | " failed\n"); | |
1679 | atomic_dec(&dest_se_deve->pr_ref_count); | |
1680 | smp_mb__after_atomic_dec(); | |
1681 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1682 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1683 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1684 | goto out; | |
1685 | } | |
1686 | #if 0 | |
1687 | printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node: %s" | |
1688 | " dest_se_deve mapped_lun: %u\n", | |
1689 | TPG_TFO(dest_tpg)->get_fabric_name(), | |
1690 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); | |
1691 | #endif | |
1692 | /* | |
1693 | * Skip any TransportIDs that already have a registration for | |
1694 | * this target port. | |
1695 | */ | |
1696 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1697 | iport_ptr); | |
1698 | if (pr_reg_e) { | |
1699 | core_scsi3_put_pr_reg(pr_reg_e); | |
1700 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1701 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1702 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1703 | ptr += tid_len; | |
1704 | tpdl -= tid_len; | |
1705 | tid_len = 0; | |
1706 | continue; | |
1707 | } | |
1708 | /* | |
1709 | * Allocate a struct pr_transport_id_holder and setup | |
1710 | * the dest_node_acl and dest_se_deve pointers for the | |
1711 | * loop below. | |
1712 | */ | |
1713 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1714 | GFP_KERNEL); | |
1715 | if (!(tidh_new)) { | |
1716 | printk(KERN_ERR "Unable to allocate tidh_new\n"); | |
1717 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1718 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1719 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1720 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1721 | goto out; | |
1722 | } | |
1723 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1724 | tidh_new->dest_tpg = dest_tpg; | |
1725 | tidh_new->dest_node_acl = dest_node_acl; | |
1726 | tidh_new->dest_se_deve = dest_se_deve; | |
1727 | ||
1728 | /* | |
1729 | * Allocate, but do NOT add the registration for the | |
1730 | * TransportID referenced SCSI Initiator port. This | |
1731 | * done because of the following from spc4r17 in section | |
1732 | * 6.14.3 wrt SPEC_I_PT: | |
1733 | * | |
1734 | * "If a registration fails for any initiator port (e.g., if th | |
1735 | * logical unit does not have enough resources available to | |
1736 | * hold the registration information), no registrations shall be | |
1737 | * made, and the command shall be terminated with | |
1738 | * CHECK CONDITION status." | |
1739 | * | |
1740 | * That means we call __core_scsi3_alloc_registration() here, | |
1741 | * and then call __core_scsi3_add_registration() in the | |
1742 | * 2nd loop which will never fail. | |
1743 | */ | |
1744 | dest_pr_reg = __core_scsi3_alloc_registration(SE_DEV(cmd), | |
1745 | dest_node_acl, dest_se_deve, iport_ptr, | |
1746 | sa_res_key, all_tg_pt, aptpl); | |
1747 | if (!(dest_pr_reg)) { | |
1748 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1749 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1750 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1751 | kfree(tidh_new); | |
1752 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
1753 | goto out; | |
1754 | } | |
1755 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1756 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1757 | ||
1758 | ptr += tid_len; | |
1759 | tpdl -= tid_len; | |
1760 | tid_len = 0; | |
1761 | ||
1762 | } | |
1763 | /* | |
1764 | * Go ahead and create a registrations from tid_dest_list for the | |
1765 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1766 | * and dest_se_deve. | |
1767 | * | |
1768 | * The SA Reservation Key from the PROUT is set for the | |
1769 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1770 | * means that the TransportID Initiator port will be | |
1771 | * registered on all of the target ports in the SCSI target device | |
1772 | * ALL_TG_PT=0 means the registration will only be for the | |
1773 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1774 | * was received. | |
1775 | */ | |
1776 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1777 | dest_tpg = tidh->dest_tpg; | |
1778 | dest_node_acl = tidh->dest_node_acl; | |
1779 | dest_se_deve = tidh->dest_se_deve; | |
1780 | dest_pr_reg = tidh->dest_pr_reg; | |
1781 | dest_local_nexus = tidh->dest_local_nexus; | |
1782 | ||
1783 | list_del(&tidh->dest_list); | |
1784 | kfree(tidh); | |
1785 | ||
1786 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1787 | prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], | |
1788 | PR_REG_ISID_ID_LEN); | |
1789 | ||
1790 | __core_scsi3_add_registration(SE_DEV(cmd), dest_node_acl, | |
1791 | dest_pr_reg, 0, 0); | |
1792 | ||
1793 | printk(KERN_INFO "SPC-3 PR [%s] SPEC_I_PT: Successfully" | |
1794 | " registered Transport ID for Node: %s%s Mapped LUN:" | |
1795 | " %u\n", TPG_TFO(dest_tpg)->get_fabric_name(), | |
1796 | dest_node_acl->initiatorname, (prf_isid) ? | |
1797 | &i_buf[0] : "", dest_se_deve->mapped_lun); | |
1798 | ||
1799 | if (dest_local_nexus) | |
1800 | continue; | |
1801 | ||
1802 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1803 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1804 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1805 | } | |
1806 | ||
1807 | return 0; | |
1808 | out: | |
1809 | /* | |
1810 | * For the failure case, release everything from tid_dest_list | |
1811 | * including *dest_pr_reg and the configfs dependances.. | |
1812 | */ | |
1813 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1814 | dest_tpg = tidh->dest_tpg; | |
1815 | dest_node_acl = tidh->dest_node_acl; | |
1816 | dest_se_deve = tidh->dest_se_deve; | |
1817 | dest_pr_reg = tidh->dest_pr_reg; | |
1818 | dest_local_nexus = tidh->dest_local_nexus; | |
1819 | ||
1820 | list_del(&tidh->dest_list); | |
1821 | kfree(tidh); | |
1822 | /* | |
1823 | * Release any extra ALL_TG_PT=1 registrations for | |
1824 | * the SPEC_I_PT=1 case. | |
1825 | */ | |
1826 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1827 | &dest_pr_reg->pr_reg_atp_list, | |
1828 | pr_reg_atp_mem_list) { | |
1829 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1830 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1831 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1832 | } | |
1833 | ||
1834 | kfree(dest_pr_reg->pr_aptpl_buf); | |
1835 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); | |
1836 | ||
1837 | if (dest_local_nexus) | |
1838 | continue; | |
1839 | ||
1840 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1841 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1842 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1843 | } | |
1844 | return ret; | |
1845 | } | |
1846 | ||
1847 | /* | |
1848 | * Called with struct se_device->dev_reservation_lock held | |
1849 | */ | |
1850 | static int __core_scsi3_update_aptpl_buf( | |
1851 | struct se_device *dev, | |
1852 | unsigned char *buf, | |
1853 | u32 pr_aptpl_buf_len, | |
1854 | int clear_aptpl_metadata) | |
1855 | { | |
1856 | struct se_lun *lun; | |
1857 | struct se_portal_group *tpg; | |
1858 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
1859 | struct t10_pr_registration *pr_reg; | |
1860 | unsigned char tmp[512], isid_buf[32]; | |
1861 | ssize_t len = 0; | |
1862 | int reg_count = 0; | |
1863 | ||
1864 | memset(buf, 0, pr_aptpl_buf_len); | |
1865 | /* | |
1866 | * Called to clear metadata once APTPL has been deactivated. | |
1867 | */ | |
1868 | if (clear_aptpl_metadata) { | |
1869 | snprintf(buf, pr_aptpl_buf_len, | |
1870 | "No Registrations or Reservations\n"); | |
1871 | return 0; | |
1872 | } | |
1873 | /* | |
1874 | * Walk the registration list.. | |
1875 | */ | |
1876 | spin_lock(&T10_RES(su_dev)->registration_lock); | |
1877 | list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list, | |
1878 | pr_reg_list) { | |
1879 | ||
1880 | tmp[0] = '\0'; | |
1881 | isid_buf[0] = '\0'; | |
1882 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1883 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1884 | /* | |
1885 | * Write out any ISID value to APTPL metadata that was included | |
1886 | * in the original registration. | |
1887 | */ | |
1888 | if (pr_reg->isid_present_at_reg) | |
1889 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1890 | pr_reg->pr_reg_isid); | |
1891 | /* | |
1892 | * Include special metadata if the pr_reg matches the | |
1893 | * reservation holder. | |
1894 | */ | |
1895 | if (dev->dev_pr_res_holder == pr_reg) { | |
1896 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1897 | "\ninitiator_fabric=%s\n" | |
1898 | "initiator_node=%s\n%s" | |
1899 | "sa_res_key=%llu\n" | |
1900 | "res_holder=1\nres_type=%02x\n" | |
1901 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1902 | "mapped_lun=%u\n", reg_count, | |
1903 | TPG_TFO(tpg)->get_fabric_name(), | |
1904 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, | |
1905 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1906 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1907 | pr_reg->pr_res_mapped_lun); | |
1908 | } else { | |
1909 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1910 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1911 | "sa_res_key=%llu\nres_holder=0\n" | |
1912 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
1913 | reg_count, TPG_TFO(tpg)->get_fabric_name(), | |
1914 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, | |
1915 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1916 | pr_reg->pr_res_mapped_lun); | |
1917 | } | |
1918 | ||
1919 | if ((len + strlen(tmp) > pr_aptpl_buf_len)) { | |
1920 | printk(KERN_ERR "Unable to update renaming" | |
1921 | " APTPL metadata\n"); | |
1922 | spin_unlock(&T10_RES(su_dev)->registration_lock); | |
1923 | return -1; | |
1924 | } | |
1925 | len += sprintf(buf+len, "%s", tmp); | |
1926 | ||
1927 | /* | |
1928 | * Include information about the associated SCSI target port. | |
1929 | */ | |
1930 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1931 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
1932 | " %d\n", TPG_TFO(tpg)->get_fabric_name(), | |
1933 | TPG_TFO(tpg)->tpg_get_wwn(tpg), | |
1934 | TPG_TFO(tpg)->tpg_get_tag(tpg), | |
1935 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); | |
1936 | ||
1937 | if ((len + strlen(tmp) > pr_aptpl_buf_len)) { | |
1938 | printk(KERN_ERR "Unable to update renaming" | |
1939 | " APTPL metadata\n"); | |
1940 | spin_unlock(&T10_RES(su_dev)->registration_lock); | |
1941 | return -1; | |
1942 | } | |
1943 | len += sprintf(buf+len, "%s", tmp); | |
1944 | reg_count++; | |
1945 | } | |
1946 | spin_unlock(&T10_RES(su_dev)->registration_lock); | |
1947 | ||
1948 | if (!(reg_count)) | |
1949 | len += sprintf(buf+len, "No Registrations or Reservations"); | |
1950 | ||
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | static int core_scsi3_update_aptpl_buf( | |
1955 | struct se_device *dev, | |
1956 | unsigned char *buf, | |
1957 | u32 pr_aptpl_buf_len, | |
1958 | int clear_aptpl_metadata) | |
1959 | { | |
1960 | int ret; | |
1961 | ||
1962 | spin_lock(&dev->dev_reservation_lock); | |
1963 | ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
1964 | clear_aptpl_metadata); | |
1965 | spin_unlock(&dev->dev_reservation_lock); | |
1966 | ||
1967 | return ret; | |
1968 | } | |
1969 | ||
1970 | /* | |
1971 | * Called with struct se_device->aptpl_file_mutex held | |
1972 | */ | |
1973 | static int __core_scsi3_write_aptpl_to_file( | |
1974 | struct se_device *dev, | |
1975 | unsigned char *buf, | |
1976 | u32 pr_aptpl_buf_len) | |
1977 | { | |
1978 | struct t10_wwn *wwn = &SU_DEV(dev)->t10_wwn; | |
1979 | struct file *file; | |
1980 | struct iovec iov[1]; | |
1981 | mm_segment_t old_fs; | |
1982 | int flags = O_RDWR | O_CREAT | O_TRUNC; | |
1983 | char path[512]; | |
1984 | int ret; | |
1985 | ||
1986 | memset(iov, 0, sizeof(struct iovec)); | |
1987 | memset(path, 0, 512); | |
1988 | ||
1989 | if (strlen(&wwn->unit_serial[0]) > 512) { | |
1990 | printk(KERN_ERR "WWN value for struct se_device does not fit" | |
1991 | " into path buffer\n"); | |
1992 | return -1; | |
1993 | } | |
1994 | ||
1995 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
1996 | file = filp_open(path, flags, 0600); | |
1997 | if (IS_ERR(file) || !file || !file->f_dentry) { | |
1998 | printk(KERN_ERR "filp_open(%s) for APTPL metadata" | |
1999 | " failed\n", path); | |
2000 | return -1; | |
2001 | } | |
2002 | ||
2003 | iov[0].iov_base = &buf[0]; | |
2004 | if (!(pr_aptpl_buf_len)) | |
2005 | iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ | |
2006 | else | |
2007 | iov[0].iov_len = pr_aptpl_buf_len; | |
2008 | ||
2009 | old_fs = get_fs(); | |
2010 | set_fs(get_ds()); | |
2011 | ret = vfs_writev(file, &iov[0], 1, &file->f_pos); | |
2012 | set_fs(old_fs); | |
2013 | ||
2014 | if (ret < 0) { | |
2015 | printk("Error writing APTPL metadata file: %s\n", path); | |
2016 | filp_close(file, NULL); | |
2017 | return -1; | |
2018 | } | |
2019 | filp_close(file, NULL); | |
2020 | ||
2021 | return 0; | |
2022 | } | |
2023 | ||
2024 | static int core_scsi3_update_and_write_aptpl( | |
2025 | struct se_device *dev, | |
2026 | unsigned char *in_buf, | |
2027 | u32 in_pr_aptpl_buf_len) | |
2028 | { | |
2029 | unsigned char null_buf[64], *buf; | |
2030 | u32 pr_aptpl_buf_len; | |
2031 | int ret, clear_aptpl_metadata = 0; | |
2032 | /* | |
2033 | * Can be called with a NULL pointer from PROUT service action CLEAR | |
2034 | */ | |
2035 | if (!(in_buf)) { | |
2036 | memset(null_buf, 0, 64); | |
2037 | buf = &null_buf[0]; | |
2038 | /* | |
2039 | * This will clear the APTPL metadata to: | |
2040 | * "No Registrations or Reservations" status | |
2041 | */ | |
2042 | pr_aptpl_buf_len = 64; | |
2043 | clear_aptpl_metadata = 1; | |
2044 | } else { | |
2045 | buf = in_buf; | |
2046 | pr_aptpl_buf_len = in_pr_aptpl_buf_len; | |
2047 | } | |
2048 | ||
2049 | ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2050 | clear_aptpl_metadata); | |
2051 | if (ret != 0) | |
2052 | return -1; | |
2053 | /* | |
2054 | * __core_scsi3_write_aptpl_to_file() will call strlen() | |
2055 | * on the passed buf to determine pr_aptpl_buf_len. | |
2056 | */ | |
2057 | ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); | |
2058 | if (ret != 0) | |
2059 | return -1; | |
2060 | ||
2061 | return ret; | |
2062 | } | |
2063 | ||
2064 | static int core_scsi3_emulate_pro_register( | |
2065 | struct se_cmd *cmd, | |
2066 | u64 res_key, | |
2067 | u64 sa_res_key, | |
2068 | int aptpl, | |
2069 | int all_tg_pt, | |
2070 | int spec_i_pt, | |
2071 | int ignore_key) | |
2072 | { | |
2073 | struct se_session *se_sess = SE_SESS(cmd); | |
2074 | struct se_device *dev = SE_DEV(cmd); | |
2075 | struct se_dev_entry *se_deve; | |
2076 | struct se_lun *se_lun = SE_LUN(cmd); | |
2077 | struct se_portal_group *se_tpg; | |
2078 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; | |
2079 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
2080 | /* Used for APTPL metadata w/ UNREGISTER */ | |
2081 | unsigned char *pr_aptpl_buf = NULL; | |
2082 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
2083 | int pr_holder = 0, ret = 0, type; | |
2084 | ||
2085 | if (!(se_sess) || !(se_lun)) { | |
2086 | printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
2087 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2088 | } | |
2089 | se_tpg = se_sess->se_tpg; | |
2090 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
2091 | ||
2092 | if (TPG_TFO(se_tpg)->sess_get_initiator_sid != NULL) { | |
2093 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); | |
2094 | TPG_TFO(se_tpg)->sess_get_initiator_sid(se_sess, &isid_buf[0], | |
2095 | PR_REG_ISID_LEN); | |
2096 | isid_ptr = &isid_buf[0]; | |
2097 | } | |
2098 | /* | |
2099 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2100 | */ | |
2101 | pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
2102 | if (!(pr_reg_e)) { | |
2103 | if (res_key) { | |
2104 | printk(KERN_WARNING "SPC-3 PR: Reservation Key non-zero" | |
2105 | " for SA REGISTER, returning CONFLICT\n"); | |
2106 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2107 | } | |
2108 | /* | |
2109 | * Do nothing but return GOOD status. | |
2110 | */ | |
2111 | if (!(sa_res_key)) | |
2112 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
2113 | ||
2114 | if (!(spec_i_pt)) { | |
2115 | /* | |
2116 | * Perform the Service Action REGISTER on the Initiator | |
2117 | * Port Endpoint that the PRO was received from on the | |
2118 | * Logical Unit of the SCSI device server. | |
2119 | */ | |
2120 | ret = core_scsi3_alloc_registration(SE_DEV(cmd), | |
2121 | se_sess->se_node_acl, se_deve, isid_ptr, | |
2122 | sa_res_key, all_tg_pt, aptpl, | |
2123 | ignore_key, 0); | |
2124 | if (ret != 0) { | |
2125 | printk(KERN_ERR "Unable to allocate" | |
2126 | " struct t10_pr_registration\n"); | |
2127 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
2128 | } | |
2129 | } else { | |
2130 | /* | |
2131 | * Register both the Initiator port that received | |
2132 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2133 | * TransportID from Parameter list and loop through | |
2134 | * fabric dependent parameter list while calling | |
2135 | * logic from of core_scsi3_alloc_registration() for | |
2136 | * each TransportID provided SCSI Initiator Port/Device | |
2137 | */ | |
2138 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2139 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2140 | if (ret != 0) | |
2141 | return ret; | |
2142 | } | |
2143 | /* | |
2144 | * Nothing left to do for the APTPL=0 case. | |
2145 | */ | |
2146 | if (!(aptpl)) { | |
2147 | pr_tmpl->pr_aptpl_active = 0; | |
2148 | core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0); | |
2149 | printk("SPC-3 PR: Set APTPL Bit Deactivated for" | |
2150 | " REGISTER\n"); | |
2151 | return 0; | |
2152 | } | |
2153 | /* | |
2154 | * Locate the newly allocated local I_T Nexus *pr_reg, and | |
2155 | * update the APTPL metadata information using its | |
2156 | * preallocated *pr_reg->pr_aptpl_buf. | |
2157 | */ | |
2158 | pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd), | |
2159 | se_sess->se_node_acl, se_sess); | |
2160 | ||
2161 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
2162 | &pr_reg->pr_aptpl_buf[0], | |
2163 | pr_tmpl->pr_aptpl_buf_len); | |
2164 | if (!(ret)) { | |
2165 | pr_tmpl->pr_aptpl_active = 1; | |
2166 | printk("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); | |
2167 | } | |
2168 | ||
2169 | core_scsi3_put_pr_reg(pr_reg); | |
2170 | return ret; | |
2171 | } else { | |
2172 | /* | |
2173 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2174 | */ | |
2175 | pr_reg = pr_reg_e; | |
2176 | type = pr_reg->pr_res_type; | |
2177 | ||
2178 | if (!(ignore_key)) { | |
2179 | if (res_key != pr_reg->pr_res_key) { | |
2180 | printk(KERN_ERR "SPC-3 PR REGISTER: Received" | |
2181 | " res_key: 0x%016Lx does not match" | |
2182 | " existing SA REGISTER res_key:" | |
2183 | " 0x%016Lx\n", res_key, | |
2184 | pr_reg->pr_res_key); | |
2185 | core_scsi3_put_pr_reg(pr_reg); | |
2186 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2187 | } | |
2188 | } | |
2189 | if (spec_i_pt) { | |
2190 | printk(KERN_ERR "SPC-3 PR UNREGISTER: SPEC_I_PT" | |
2191 | " set while sa_res_key=0\n"); | |
2192 | core_scsi3_put_pr_reg(pr_reg); | |
2193 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
2194 | } | |
2195 | /* | |
2196 | * An existing ALL_TG_PT=1 registration being released | |
2197 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2198 | */ | |
2199 | if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { | |
2200 | printk(KERN_ERR "SPC-3 PR UNREGISTER: ALL_TG_PT=1" | |
2201 | " registration exists, but ALL_TG_PT=1 bit not" | |
2202 | " present in received PROUT\n"); | |
2203 | core_scsi3_put_pr_reg(pr_reg); | |
2204 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
2205 | } | |
2206 | /* | |
2207 | * Allocate APTPL metadata buffer used for UNREGISTER ops | |
2208 | */ | |
2209 | if (aptpl) { | |
2210 | pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, | |
2211 | GFP_KERNEL); | |
2212 | if (!(pr_aptpl_buf)) { | |
2213 | printk(KERN_ERR "Unable to allocate" | |
2214 | " pr_aptpl_buf\n"); | |
2215 | core_scsi3_put_pr_reg(pr_reg); | |
2216 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2217 | } | |
2218 | } | |
2219 | /* | |
2220 | * sa_res_key=0 Unregister Reservation Key for registered I_T | |
2221 | * Nexus sa_res_key=1 Change Reservation Key for registered I_T | |
2222 | * Nexus. | |
2223 | */ | |
2224 | if (!(sa_res_key)) { | |
2225 | pr_holder = core_scsi3_check_implict_release( | |
2226 | SE_DEV(cmd), pr_reg); | |
2227 | if (pr_holder < 0) { | |
2228 | kfree(pr_aptpl_buf); | |
2229 | core_scsi3_put_pr_reg(pr_reg); | |
2230 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2231 | } | |
2232 | ||
2233 | spin_lock(&pr_tmpl->registration_lock); | |
2234 | /* | |
2235 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port | |
2236 | * and matching pr_res_key. | |
2237 | */ | |
2238 | if (pr_reg->pr_reg_all_tg_pt) { | |
2239 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2240 | &pr_tmpl->registration_list, | |
2241 | pr_reg_list) { | |
2242 | ||
2243 | if (!(pr_reg_p->pr_reg_all_tg_pt)) | |
2244 | continue; | |
2245 | ||
2246 | if (pr_reg_p->pr_res_key != res_key) | |
2247 | continue; | |
2248 | ||
2249 | if (pr_reg == pr_reg_p) | |
2250 | continue; | |
2251 | ||
2252 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2253 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2254 | continue; | |
2255 | ||
2256 | __core_scsi3_free_registration(dev, | |
2257 | pr_reg_p, NULL, 0); | |
2258 | } | |
2259 | } | |
2260 | /* | |
2261 | * Release the calling I_T Nexus registration now.. | |
2262 | */ | |
2263 | __core_scsi3_free_registration(SE_DEV(cmd), pr_reg, | |
2264 | NULL, 1); | |
2265 | /* | |
2266 | * From spc4r17, section 5.7.11.3 Unregistering | |
2267 | * | |
2268 | * If the persistent reservation is a registrants only | |
2269 | * type, the device server shall establish a unit | |
2270 | * attention condition for the initiator port associated | |
2271 | * with every registered I_T nexus except for the I_T | |
2272 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2273 | * received, with the additional sense code set to | |
2274 | * RESERVATIONS RELEASED. | |
2275 | */ | |
2276 | if (pr_holder && | |
2277 | ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
2278 | (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { | |
2279 | list_for_each_entry(pr_reg_p, | |
2280 | &pr_tmpl->registration_list, | |
2281 | pr_reg_list) { | |
2282 | ||
2283 | core_scsi3_ua_allocate( | |
2284 | pr_reg_p->pr_reg_nacl, | |
2285 | pr_reg_p->pr_res_mapped_lun, | |
2286 | 0x2A, | |
2287 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
2288 | } | |
2289 | } | |
2290 | spin_unlock(&pr_tmpl->registration_lock); | |
2291 | ||
2292 | if (!(aptpl)) { | |
2293 | pr_tmpl->pr_aptpl_active = 0; | |
2294 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2295 | printk("SPC-3 PR: Set APTPL Bit Deactivated" | |
2296 | " for UNREGISTER\n"); | |
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2301 | &pr_aptpl_buf[0], | |
2302 | pr_tmpl->pr_aptpl_buf_len); | |
2303 | if (!(ret)) { | |
2304 | pr_tmpl->pr_aptpl_active = 1; | |
2305 | printk("SPC-3 PR: Set APTPL Bit Activated" | |
2306 | " for UNREGISTER\n"); | |
2307 | } | |
2308 | ||
2309 | kfree(pr_aptpl_buf); | |
2310 | return ret; | |
2311 | } else { | |
2312 | /* | |
2313 | * Increment PRgeneration counter for struct se_device" | |
2314 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2315 | * READ_KEYS service action. | |
2316 | */ | |
2317 | pr_reg->pr_res_generation = core_scsi3_pr_generation( | |
2318 | SE_DEV(cmd)); | |
2319 | pr_reg->pr_res_key = sa_res_key; | |
2320 | printk("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2321 | " Key for %s to: 0x%016Lx PRgeneration:" | |
2322 | " 0x%08x\n", CMD_TFO(cmd)->get_fabric_name(), | |
2323 | (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", | |
2324 | pr_reg->pr_reg_nacl->initiatorname, | |
2325 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2326 | ||
2327 | if (!(aptpl)) { | |
2328 | pr_tmpl->pr_aptpl_active = 0; | |
2329 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2330 | core_scsi3_put_pr_reg(pr_reg); | |
2331 | printk("SPC-3 PR: Set APTPL Bit Deactivated" | |
2332 | " for REGISTER\n"); | |
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | ret = core_scsi3_update_and_write_aptpl(dev, | |
2337 | &pr_aptpl_buf[0], | |
2338 | pr_tmpl->pr_aptpl_buf_len); | |
2339 | if (!(ret)) { | |
2340 | pr_tmpl->pr_aptpl_active = 1; | |
2341 | printk("SPC-3 PR: Set APTPL Bit Activated" | |
2342 | " for REGISTER\n"); | |
2343 | } | |
2344 | ||
2345 | kfree(pr_aptpl_buf); | |
2346 | core_scsi3_put_pr_reg(pr_reg); | |
2347 | } | |
2348 | } | |
2349 | return 0; | |
2350 | } | |
2351 | ||
2352 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2353 | { | |
2354 | switch (type) { | |
2355 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2356 | return "Write Exclusive Access"; | |
2357 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2358 | return "Exclusive Access"; | |
2359 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2360 | return "Write Exclusive Access, Registrants Only"; | |
2361 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2362 | return "Exclusive Access, Registrants Only"; | |
2363 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2364 | return "Write Exclusive Access, All Registrants"; | |
2365 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2366 | return "Exclusive Access, All Registrants"; | |
2367 | default: | |
2368 | break; | |
2369 | } | |
2370 | ||
2371 | return "Unknown SPC-3 PR Type"; | |
2372 | } | |
2373 | ||
2374 | static int core_scsi3_pro_reserve( | |
2375 | struct se_cmd *cmd, | |
2376 | struct se_device *dev, | |
2377 | int type, | |
2378 | int scope, | |
2379 | u64 res_key) | |
2380 | { | |
2381 | struct se_session *se_sess = SE_SESS(cmd); | |
2382 | struct se_dev_entry *se_deve; | |
2383 | struct se_lun *se_lun = SE_LUN(cmd); | |
2384 | struct se_portal_group *se_tpg; | |
2385 | struct t10_pr_registration *pr_reg, *pr_res_holder; | |
2386 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
2387 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2388 | int ret, prf_isid; | |
2389 | ||
2390 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2391 | ||
2392 | if (!(se_sess) || !(se_lun)) { | |
2393 | printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
2394 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2395 | } | |
2396 | se_tpg = se_sess->se_tpg; | |
2397 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
2398 | /* | |
2399 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2400 | */ | |
2401 | pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl, | |
2402 | se_sess); | |
2403 | if (!(pr_reg)) { | |
2404 | printk(KERN_ERR "SPC-3 PR: Unable to locate" | |
2405 | " PR_REGISTERED *pr_reg for RESERVE\n"); | |
2406 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2407 | } | |
2408 | /* | |
2409 | * From spc4r17 Section 5.7.9: Reserving: | |
2410 | * | |
2411 | * An application client creates a persistent reservation by issuing | |
2412 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2413 | * a registered I_T nexus with the following parameters: | |
2414 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2415 | * registered with the logical unit for the I_T nexus; and | |
2416 | */ | |
2417 | if (res_key != pr_reg->pr_res_key) { | |
2418 | printk(KERN_ERR "SPC-3 PR RESERVE: Received res_key: 0x%016Lx" | |
2419 | " does not match existing SA REGISTER res_key:" | |
2420 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2421 | core_scsi3_put_pr_reg(pr_reg); | |
2422 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2423 | } | |
2424 | /* | |
2425 | * From spc4r17 Section 5.7.9: Reserving: | |
2426 | * | |
2427 | * From above: | |
2428 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2429 | * being created. | |
2430 | * | |
2431 | * Only one persistent reservation is allowed at a time per logical unit | |
2432 | * and that persistent reservation has a scope of LU_SCOPE. | |
2433 | */ | |
2434 | if (scope != PR_SCOPE_LU_SCOPE) { | |
2435 | printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); | |
2436 | core_scsi3_put_pr_reg(pr_reg); | |
2437 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
2438 | } | |
2439 | /* | |
2440 | * See if we have an existing PR reservation holder pointer at | |
2441 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2442 | * *pr_res_holder. | |
2443 | */ | |
2444 | spin_lock(&dev->dev_reservation_lock); | |
2445 | pr_res_holder = dev->dev_pr_res_holder; | |
2446 | if ((pr_res_holder)) { | |
2447 | /* | |
2448 | * From spc4r17 Section 5.7.9: Reserving: | |
2449 | * | |
2450 | * If the device server receives a PERSISTENT RESERVE OUT | |
2451 | * command from an I_T nexus other than a persistent reservation | |
2452 | * holder (see 5.7.10) that attempts to create a persistent | |
2453 | * reservation when a persistent reservation already exists for | |
2454 | * the logical unit, then the command shall be completed with | |
2455 | * RESERVATION CONFLICT status. | |
2456 | */ | |
2457 | if (pr_res_holder != pr_reg) { | |
2458 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2459 | printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from" | |
2460 | " [%s]: %s while reservation already held by" | |
2461 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
2462 | CMD_TFO(cmd)->get_fabric_name(), | |
2463 | se_sess->se_node_acl->initiatorname, | |
2464 | TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(), | |
2465 | pr_res_holder->pr_reg_nacl->initiatorname); | |
2466 | ||
2467 | spin_unlock(&dev->dev_reservation_lock); | |
2468 | core_scsi3_put_pr_reg(pr_reg); | |
2469 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2470 | } | |
2471 | /* | |
2472 | * From spc4r17 Section 5.7.9: Reserving: | |
2473 | * | |
2474 | * If a persistent reservation holder attempts to modify the | |
2475 | * type or scope of an existing persistent reservation, the | |
2476 | * command shall be completed with RESERVATION CONFLICT status. | |
2477 | */ | |
2478 | if ((pr_res_holder->pr_res_type != type) || | |
2479 | (pr_res_holder->pr_res_scope != scope)) { | |
2480 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2481 | printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from" | |
2482 | " [%s]: %s trying to change TYPE and/or SCOPE," | |
2483 | " while reservation already held by [%s]: %s," | |
2484 | " returning RESERVATION_CONFLICT\n", | |
2485 | CMD_TFO(cmd)->get_fabric_name(), | |
2486 | se_sess->se_node_acl->initiatorname, | |
2487 | TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(), | |
2488 | pr_res_holder->pr_reg_nacl->initiatorname); | |
2489 | ||
2490 | spin_unlock(&dev->dev_reservation_lock); | |
2491 | core_scsi3_put_pr_reg(pr_reg); | |
2492 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2493 | } | |
2494 | /* | |
2495 | * From spc4r17 Section 5.7.9: Reserving: | |
2496 | * | |
2497 | * If the device server receives a PERSISTENT RESERVE OUT | |
2498 | * command with RESERVE service action where the TYPE field and | |
2499 | * the SCOPE field contain the same values as the existing type | |
2500 | * and scope from a persistent reservation holder, it shall not | |
2501 | * make any change to the existing persistent reservation and | |
2502 | * shall completethe command with GOOD status. | |
2503 | */ | |
2504 | spin_unlock(&dev->dev_reservation_lock); | |
2505 | core_scsi3_put_pr_reg(pr_reg); | |
2506 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
2507 | } | |
2508 | /* | |
2509 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2510 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2511 | */ | |
2512 | pr_reg->pr_res_scope = scope; | |
2513 | pr_reg->pr_res_type = type; | |
2514 | pr_reg->pr_res_holder = 1; | |
2515 | dev->dev_pr_res_holder = pr_reg; | |
2516 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2517 | PR_REG_ISID_ID_LEN); | |
2518 | ||
2519 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: RESERVE created new" | |
2520 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2521 | CMD_TFO(cmd)->get_fabric_name(), core_scsi3_pr_dump_type(type), | |
2522 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2523 | printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n", | |
2524 | CMD_TFO(cmd)->get_fabric_name(), | |
2525 | se_sess->se_node_acl->initiatorname, | |
2526 | (prf_isid) ? &i_buf[0] : ""); | |
2527 | spin_unlock(&dev->dev_reservation_lock); | |
2528 | ||
2529 | if (pr_tmpl->pr_aptpl_active) { | |
2530 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
2531 | &pr_reg->pr_aptpl_buf[0], | |
2532 | pr_tmpl->pr_aptpl_buf_len); | |
2533 | if (!(ret)) | |
2534 | printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata" | |
2535 | " for RESERVE\n"); | |
2536 | } | |
2537 | ||
2538 | core_scsi3_put_pr_reg(pr_reg); | |
2539 | return 0; | |
2540 | } | |
2541 | ||
2542 | static int core_scsi3_emulate_pro_reserve( | |
2543 | struct se_cmd *cmd, | |
2544 | int type, | |
2545 | int scope, | |
2546 | u64 res_key) | |
2547 | { | |
2548 | struct se_device *dev = cmd->se_dev; | |
2549 | int ret = 0; | |
2550 | ||
2551 | switch (type) { | |
2552 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2553 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2554 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2555 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2556 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2557 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2558 | ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); | |
2559 | break; | |
2560 | default: | |
2561 | printk(KERN_ERR "SPC-3 PR: Unknown Service Action RESERVE Type:" | |
2562 | " 0x%02x\n", type); | |
2563 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
2564 | } | |
2565 | ||
2566 | return ret; | |
2567 | } | |
2568 | ||
2569 | /* | |
2570 | * Called with struct se_device->dev_reservation_lock held. | |
2571 | */ | |
2572 | static void __core_scsi3_complete_pro_release( | |
2573 | struct se_device *dev, | |
2574 | struct se_node_acl *se_nacl, | |
2575 | struct t10_pr_registration *pr_reg, | |
2576 | int explict) | |
2577 | { | |
2578 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; | |
2579 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2580 | int prf_isid; | |
2581 | ||
2582 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2583 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2584 | PR_REG_ISID_ID_LEN); | |
2585 | /* | |
2586 | * Go ahead and release the current PR reservation holder. | |
2587 | */ | |
2588 | dev->dev_pr_res_holder = NULL; | |
2589 | ||
2590 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: %s RELEASE cleared" | |
2591 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2592 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", | |
2593 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
2594 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2595 | printk(KERN_INFO "SPC-3 PR [%s] RELEASE Node: %s%s\n", | |
2596 | tfo->get_fabric_name(), se_nacl->initiatorname, | |
2597 | (prf_isid) ? &i_buf[0] : ""); | |
2598 | /* | |
2599 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2600 | */ | |
2601 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2602 | } | |
2603 | ||
2604 | static int core_scsi3_emulate_pro_release( | |
2605 | struct se_cmd *cmd, | |
2606 | int type, | |
2607 | int scope, | |
2608 | u64 res_key) | |
2609 | { | |
2610 | struct se_device *dev = cmd->se_dev; | |
2611 | struct se_session *se_sess = SE_SESS(cmd); | |
2612 | struct se_lun *se_lun = SE_LUN(cmd); | |
2613 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; | |
2614 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
2615 | int ret, all_reg = 0; | |
2616 | ||
2617 | if (!(se_sess) || !(se_lun)) { | |
2618 | printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
2619 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2620 | } | |
2621 | /* | |
2622 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2623 | */ | |
2624 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
2625 | if (!(pr_reg)) { | |
2626 | printk(KERN_ERR "SPC-3 PR: Unable to locate" | |
2627 | " PR_REGISTERED *pr_reg for RELEASE\n"); | |
2628 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2629 | } | |
2630 | /* | |
2631 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2632 | * | |
2633 | * If there is no persistent reservation or in response to a persistent | |
2634 | * reservation release request from a registered I_T nexus that is not a | |
2635 | * persistent reservation holder (see 5.7.10), the device server shall | |
2636 | * do the following: | |
2637 | * | |
2638 | * a) Not release the persistent reservation, if any; | |
2639 | * b) Not remove any registrations; and | |
2640 | * c) Complete the command with GOOD status. | |
2641 | */ | |
2642 | spin_lock(&dev->dev_reservation_lock); | |
2643 | pr_res_holder = dev->dev_pr_res_holder; | |
2644 | if (!(pr_res_holder)) { | |
2645 | /* | |
2646 | * No persistent reservation, return GOOD status. | |
2647 | */ | |
2648 | spin_unlock(&dev->dev_reservation_lock); | |
2649 | core_scsi3_put_pr_reg(pr_reg); | |
2650 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
2651 | } | |
2652 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2653 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
2654 | all_reg = 1; | |
2655 | ||
2656 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { | |
2657 | /* | |
2658 | * Non 'All Registrants' PR Type cases.. | |
2659 | * Release request from a registered I_T nexus that is not a | |
2660 | * persistent reservation holder. return GOOD status. | |
2661 | */ | |
2662 | spin_unlock(&dev->dev_reservation_lock); | |
2663 | core_scsi3_put_pr_reg(pr_reg); | |
2664 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
2665 | } | |
2666 | /* | |
2667 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2668 | * | |
2669 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2670 | * release a persistent reservation. | |
2671 | * | |
2672 | * An application client releases the persistent reservation by issuing | |
2673 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2674 | * an I_T nexus that is a persistent reservation holder with the | |
2675 | * following parameters: | |
2676 | * | |
2677 | * a) RESERVATION KEY field set to the value of the reservation key | |
2678 | * that is registered with the logical unit for the I_T nexus; | |
2679 | */ | |
2680 | if (res_key != pr_reg->pr_res_key) { | |
2681 | printk(KERN_ERR "SPC-3 PR RELEASE: Received res_key: 0x%016Lx" | |
2682 | " does not match existing SA REGISTER res_key:" | |
2683 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2684 | spin_unlock(&dev->dev_reservation_lock); | |
2685 | core_scsi3_put_pr_reg(pr_reg); | |
2686 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2687 | } | |
2688 | /* | |
2689 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2690 | * | |
2691 | * b) TYPE field and SCOPE field set to match the persistent | |
2692 | * reservation being released. | |
2693 | */ | |
2694 | if ((pr_res_holder->pr_res_type != type) || | |
2695 | (pr_res_holder->pr_res_scope != scope)) { | |
2696 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2697 | printk(KERN_ERR "SPC-3 PR RELEASE: Attempted to release" | |
2698 | " reservation from [%s]: %s with different TYPE " | |
2699 | "and/or SCOPE while reservation already held by" | |
2700 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
2701 | CMD_TFO(cmd)->get_fabric_name(), | |
2702 | se_sess->se_node_acl->initiatorname, | |
2703 | TPG_TFO(pr_res_nacl->se_tpg)->get_fabric_name(), | |
2704 | pr_res_holder->pr_reg_nacl->initiatorname); | |
2705 | ||
2706 | spin_unlock(&dev->dev_reservation_lock); | |
2707 | core_scsi3_put_pr_reg(pr_reg); | |
2708 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2709 | } | |
2710 | /* | |
2711 | * In response to a persistent reservation release request from the | |
2712 | * persistent reservation holder the device server shall perform a | |
2713 | * release by doing the following as an uninterrupted series of actions: | |
2714 | * a) Release the persistent reservation; | |
2715 | * b) Not remove any registration(s); | |
2716 | * c) If the released persistent reservation is a registrants only type | |
2717 | * or all registrants type persistent reservation, | |
2718 | * the device server shall establish a unit attention condition for | |
2719 | * the initiator port associated with every regis- | |
2720 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2721 | * RESERVE OUT command with RELEASE service action was received, | |
2722 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2723 | * d) If the persistent reservation is of any other type, the device | |
2724 | * server shall not establish a unit attention condition. | |
2725 | */ | |
2726 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
2727 | pr_reg, 1); | |
2728 | ||
2729 | spin_unlock(&dev->dev_reservation_lock); | |
2730 | ||
2731 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2732 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2733 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2734 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2735 | /* | |
2736 | * If no UNIT ATTENTION conditions will be established for | |
2737 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2738 | * go ahead and check for APTPL=1 update+write below | |
2739 | */ | |
2740 | goto write_aptpl; | |
2741 | } | |
2742 | ||
2743 | spin_lock(&pr_tmpl->registration_lock); | |
2744 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2745 | pr_reg_list) { | |
2746 | /* | |
2747 | * Do not establish a UNIT ATTENTION condition | |
2748 | * for the calling I_T Nexus | |
2749 | */ | |
2750 | if (pr_reg_p == pr_reg) | |
2751 | continue; | |
2752 | ||
2753 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2754 | pr_reg_p->pr_res_mapped_lun, | |
2755 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2756 | } | |
2757 | spin_unlock(&pr_tmpl->registration_lock); | |
2758 | ||
2759 | write_aptpl: | |
2760 | if (pr_tmpl->pr_aptpl_active) { | |
2761 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
2762 | &pr_reg->pr_aptpl_buf[0], | |
2763 | pr_tmpl->pr_aptpl_buf_len); | |
2764 | if (!(ret)) | |
2765 | printk("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); | |
2766 | } | |
2767 | ||
2768 | core_scsi3_put_pr_reg(pr_reg); | |
2769 | return 0; | |
2770 | } | |
2771 | ||
2772 | static int core_scsi3_emulate_pro_clear( | |
2773 | struct se_cmd *cmd, | |
2774 | u64 res_key) | |
2775 | { | |
2776 | struct se_device *dev = cmd->se_dev; | |
2777 | struct se_node_acl *pr_reg_nacl; | |
2778 | struct se_session *se_sess = SE_SESS(cmd); | |
2779 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
2780 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; | |
2781 | u32 pr_res_mapped_lun = 0; | |
2782 | int calling_it_nexus = 0; | |
2783 | /* | |
2784 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2785 | */ | |
2786 | pr_reg_n = core_scsi3_locate_pr_reg(SE_DEV(cmd), | |
2787 | se_sess->se_node_acl, se_sess); | |
2788 | if (!(pr_reg_n)) { | |
2789 | printk(KERN_ERR "SPC-3 PR: Unable to locate" | |
2790 | " PR_REGISTERED *pr_reg for CLEAR\n"); | |
2791 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2792 | } | |
2793 | /* | |
2794 | * From spc4r17 section 5.7.11.6, Clearing: | |
2795 | * | |
2796 | * Any application client may release the persistent reservation and | |
2797 | * remove all registrations from a device server by issuing a | |
2798 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2799 | * registered I_T nexus with the following parameter: | |
2800 | * | |
2801 | * a) RESERVATION KEY field set to the value of the reservation key | |
2802 | * that is registered with the logical unit for the I_T nexus. | |
2803 | */ | |
2804 | if (res_key != pr_reg_n->pr_res_key) { | |
2805 | printk(KERN_ERR "SPC-3 PR REGISTER: Received" | |
2806 | " res_key: 0x%016Lx does not match" | |
2807 | " existing SA REGISTER res_key:" | |
2808 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2809 | core_scsi3_put_pr_reg(pr_reg_n); | |
2810 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2811 | } | |
2812 | /* | |
2813 | * a) Release the persistent reservation, if any; | |
2814 | */ | |
2815 | spin_lock(&dev->dev_reservation_lock); | |
2816 | pr_res_holder = dev->dev_pr_res_holder; | |
2817 | if (pr_res_holder) { | |
2818 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2819 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
2820 | pr_res_holder, 0); | |
2821 | } | |
2822 | spin_unlock(&dev->dev_reservation_lock); | |
2823 | /* | |
2824 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2825 | */ | |
2826 | spin_lock(&pr_tmpl->registration_lock); | |
2827 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2828 | &pr_tmpl->registration_list, pr_reg_list) { | |
2829 | ||
2830 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2831 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2832 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2833 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2834 | calling_it_nexus); | |
2835 | /* | |
2836 | * e) Establish a unit attention condition for the initiator | |
2837 | * port associated with every registered I_T nexus other | |
2838 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2839 | * command with CLEAR service action was received, with the | |
2840 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2841 | */ | |
2842 | if (!(calling_it_nexus)) | |
2843 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, | |
2844 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2845 | } | |
2846 | spin_unlock(&pr_tmpl->registration_lock); | |
2847 | ||
2848 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: CLEAR complete\n", | |
2849 | CMD_TFO(cmd)->get_fabric_name()); | |
2850 | ||
2851 | if (pr_tmpl->pr_aptpl_active) { | |
2852 | core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0); | |
2853 | printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata" | |
2854 | " for CLEAR\n"); | |
2855 | } | |
2856 | ||
2857 | core_scsi3_pr_generation(dev); | |
2858 | return 0; | |
2859 | } | |
2860 | ||
2861 | /* | |
2862 | * Called with struct se_device->dev_reservation_lock held. | |
2863 | */ | |
2864 | static void __core_scsi3_complete_pro_preempt( | |
2865 | struct se_device *dev, | |
2866 | struct t10_pr_registration *pr_reg, | |
2867 | struct list_head *preempt_and_abort_list, | |
2868 | int type, | |
2869 | int scope, | |
2870 | int abort) | |
2871 | { | |
2872 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
2873 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
2874 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2875 | int prf_isid; | |
2876 | ||
2877 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2878 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2879 | PR_REG_ISID_ID_LEN); | |
2880 | /* | |
2881 | * Do an implict RELEASE of the existing reservation. | |
2882 | */ | |
2883 | if (dev->dev_pr_res_holder) | |
2884 | __core_scsi3_complete_pro_release(dev, nacl, | |
2885 | dev->dev_pr_res_holder, 0); | |
2886 | ||
2887 | dev->dev_pr_res_holder = pr_reg; | |
2888 | pr_reg->pr_res_holder = 1; | |
2889 | pr_reg->pr_res_type = type; | |
2890 | pr_reg->pr_res_scope = scope; | |
2891 | ||
2892 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: PREEMPT%s created new" | |
2893 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2894 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2895 | core_scsi3_pr_dump_type(type), | |
2896 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2897 | printk(KERN_INFO "SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", | |
2898 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2899 | nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); | |
2900 | /* | |
2901 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2902 | * struct t10_pr_registration to the list that will be compared | |
2903 | * against received CDBs.. | |
2904 | */ | |
2905 | if (preempt_and_abort_list) | |
2906 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2907 | preempt_and_abort_list); | |
2908 | } | |
2909 | ||
2910 | static void core_scsi3_release_preempt_and_abort( | |
2911 | struct list_head *preempt_and_abort_list, | |
2912 | struct t10_pr_registration *pr_reg_holder) | |
2913 | { | |
2914 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2915 | ||
2916 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2917 | pr_reg_abort_list) { | |
2918 | ||
2919 | list_del(&pr_reg->pr_reg_abort_list); | |
2920 | if (pr_reg_holder == pr_reg) | |
2921 | continue; | |
2922 | if (pr_reg->pr_res_holder) { | |
2923 | printk(KERN_WARNING "pr_reg->pr_res_holder still set\n"); | |
2924 | continue; | |
2925 | } | |
2926 | ||
2927 | pr_reg->pr_reg_deve = NULL; | |
2928 | pr_reg->pr_reg_nacl = NULL; | |
2929 | kfree(pr_reg->pr_aptpl_buf); | |
2930 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
2931 | } | |
2932 | } | |
2933 | ||
2934 | int core_scsi3_check_cdb_abort_and_preempt( | |
2935 | struct list_head *preempt_and_abort_list, | |
2936 | struct se_cmd *cmd) | |
2937 | { | |
2938 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2939 | ||
2940 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2941 | pr_reg_abort_list) { | |
2942 | if (pr_reg->pr_res_key == cmd->pr_res_key) | |
2943 | return 0; | |
2944 | } | |
2945 | ||
2946 | return 1; | |
2947 | } | |
2948 | ||
2949 | static int core_scsi3_pro_preempt( | |
2950 | struct se_cmd *cmd, | |
2951 | int type, | |
2952 | int scope, | |
2953 | u64 res_key, | |
2954 | u64 sa_res_key, | |
2955 | int abort) | |
2956 | { | |
2957 | struct se_device *dev = SE_DEV(cmd); | |
2958 | struct se_dev_entry *se_deve; | |
2959 | struct se_node_acl *pr_reg_nacl; | |
2960 | struct se_session *se_sess = SE_SESS(cmd); | |
2961 | struct list_head preempt_and_abort_list; | |
2962 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; | |
2963 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
2964 | u32 pr_res_mapped_lun = 0; | |
2965 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; | |
2966 | int prh_type = 0, prh_scope = 0, ret; | |
2967 | ||
2968 | if (!(se_sess)) | |
2969 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
2970 | ||
2971 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
2972 | pr_reg_n = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl, | |
2973 | se_sess); | |
2974 | if (!(pr_reg_n)) { | |
2975 | printk(KERN_ERR "SPC-3 PR: Unable to locate" | |
2976 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", | |
2977 | (abort) ? "_AND_ABORT" : ""); | |
2978 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2979 | } | |
2980 | if (pr_reg_n->pr_res_key != res_key) { | |
2981 | core_scsi3_put_pr_reg(pr_reg_n); | |
2982 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
2983 | } | |
2984 | if (scope != PR_SCOPE_LU_SCOPE) { | |
2985 | printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); | |
2986 | core_scsi3_put_pr_reg(pr_reg_n); | |
2987 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
2988 | } | |
2989 | INIT_LIST_HEAD(&preempt_and_abort_list); | |
2990 | ||
2991 | spin_lock(&dev->dev_reservation_lock); | |
2992 | pr_res_holder = dev->dev_pr_res_holder; | |
2993 | if (pr_res_holder && | |
2994 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2995 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2996 | all_reg = 1; | |
2997 | ||
2998 | if (!(all_reg) && !(sa_res_key)) { | |
2999 | spin_unlock(&dev->dev_reservation_lock); | |
3000 | core_scsi3_put_pr_reg(pr_reg_n); | |
3001 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3002 | } | |
3003 | /* | |
3004 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
3005 | * | |
3006 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
3007 | * persistent reservation holder or there is no persistent reservation | |
3008 | * holder (i.e., there is no persistent reservation), then the device | |
3009 | * server shall perform a preempt by doing the following in an | |
3010 | * uninterrupted series of actions. (See below..) | |
3011 | */ | |
3012 | if (!(pr_res_holder) || (pr_res_holder->pr_res_key != sa_res_key)) { | |
3013 | /* | |
3014 | * No existing or SA Reservation Key matching reservations.. | |
3015 | * | |
3016 | * PROUT SA PREEMPT with All Registrant type reservations are | |
3017 | * allowed to be processed without a matching SA Reservation Key | |
3018 | */ | |
3019 | spin_lock(&pr_tmpl->registration_lock); | |
3020 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3021 | &pr_tmpl->registration_list, pr_reg_list) { | |
3022 | /* | |
3023 | * Removing of registrations in non all registrants | |
3024 | * type reservations without a matching SA reservation | |
3025 | * key. | |
3026 | * | |
3027 | * a) Remove the registrations for all I_T nexuses | |
3028 | * specified by the SERVICE ACTION RESERVATION KEY | |
3029 | * field; | |
3030 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
3031 | * c) Process tasks as defined in 5.7.1; and | |
3032 | * d) Establish a unit attention condition for the | |
3033 | * initiator port associated with every I_T nexus | |
3034 | * that lost its registration other than the I_T | |
3035 | * nexus on which the PERSISTENT RESERVE OUT command | |
3036 | * was received, with the additional sense code set | |
3037 | * to REGISTRATIONS PREEMPTED. | |
3038 | */ | |
3039 | if (!(all_reg)) { | |
3040 | if (pr_reg->pr_res_key != sa_res_key) | |
3041 | continue; | |
3042 | ||
3043 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3044 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3045 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3046 | __core_scsi3_free_registration(dev, pr_reg, | |
3047 | (abort) ? &preempt_and_abort_list : | |
3048 | NULL, calling_it_nexus); | |
3049 | released_regs++; | |
3050 | } else { | |
3051 | /* | |
3052 | * Case for any existing all registrants type | |
3053 | * reservation, follow logic in spc4r17 section | |
3054 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
3055 | * | |
3056 | * For a ZERO SA Reservation key, release | |
3057 | * all other registrations and do an implict | |
3058 | * release of active persistent reservation. | |
3059 | * | |
3060 | * For a non-ZERO SA Reservation key, only | |
3061 | * release the matching reservation key from | |
3062 | * registrations. | |
3063 | */ | |
3064 | if ((sa_res_key) && | |
3065 | (pr_reg->pr_res_key != sa_res_key)) | |
3066 | continue; | |
3067 | ||
3068 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3069 | if (calling_it_nexus) | |
3070 | continue; | |
3071 | ||
3072 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3073 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3074 | __core_scsi3_free_registration(dev, pr_reg, | |
3075 | (abort) ? &preempt_and_abort_list : | |
3076 | NULL, 0); | |
3077 | released_regs++; | |
3078 | } | |
3079 | if (!(calling_it_nexus)) | |
3080 | core_scsi3_ua_allocate(pr_reg_nacl, | |
3081 | pr_res_mapped_lun, 0x2A, | |
3082 | ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
3083 | } | |
3084 | spin_unlock(&pr_tmpl->registration_lock); | |
3085 | /* | |
3086 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
3087 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
3088 | * RESERVATION KEY field to a value that does not match any | |
3089 | * registered reservation key, then the device server shall | |
3090 | * complete the command with RESERVATION CONFLICT status. | |
3091 | */ | |
3092 | if (!(released_regs)) { | |
3093 | spin_unlock(&dev->dev_reservation_lock); | |
3094 | core_scsi3_put_pr_reg(pr_reg_n); | |
3095 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
3096 | } | |
3097 | /* | |
3098 | * For an existing all registrants type reservation | |
3099 | * with a zero SA rservation key, preempt the existing | |
3100 | * reservation with the new PR type and scope. | |
3101 | */ | |
3102 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
3103 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3104 | (abort) ? &preempt_and_abort_list : NULL, | |
3105 | type, scope, abort); | |
3106 | ||
3107 | if (abort) | |
3108 | core_scsi3_release_preempt_and_abort( | |
3109 | &preempt_and_abort_list, pr_reg_n); | |
3110 | } | |
3111 | spin_unlock(&dev->dev_reservation_lock); | |
3112 | ||
3113 | if (pr_tmpl->pr_aptpl_active) { | |
3114 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
3115 | &pr_reg_n->pr_aptpl_buf[0], | |
3116 | pr_tmpl->pr_aptpl_buf_len); | |
3117 | if (!(ret)) | |
3118 | printk(KERN_INFO "SPC-3 PR: Updated APTPL" | |
3119 | " metadata for PREEMPT%s\n", (abort) ? | |
3120 | "_AND_ABORT" : ""); | |
3121 | } | |
3122 | ||
3123 | core_scsi3_put_pr_reg(pr_reg_n); | |
3124 | core_scsi3_pr_generation(SE_DEV(cmd)); | |
3125 | return 0; | |
3126 | } | |
3127 | /* | |
3128 | * The PREEMPTing SA reservation key matches that of the | |
3129 | * existing persistent reservation, first, we check if | |
3130 | * we are preempting our own reservation. | |
3131 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3132 | * persistent reservations and registration handling | |
3133 | * | |
3134 | * If an all registrants persistent reservation is not | |
3135 | * present, it is not an error for the persistent | |
3136 | * reservation holder to preempt itself (i.e., a | |
3137 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3138 | * or a PREEMPT AND ABORT service action with the | |
3139 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3140 | * persistent reservation holder's reservation key that | |
3141 | * is received from the persistent reservation holder). | |
3142 | * In that case, the device server shall establish the | |
3143 | * new persistent reservation and maintain the | |
3144 | * registration. | |
3145 | */ | |
3146 | prh_type = pr_res_holder->pr_res_type; | |
3147 | prh_scope = pr_res_holder->pr_res_scope; | |
3148 | /* | |
3149 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3150 | * persistent reservation holder (see 5.7.10), the device | |
3151 | * server shall perform a preempt by doing the following as | |
3152 | * an uninterrupted series of actions: | |
3153 | * | |
3154 | * a) Release the persistent reservation for the holder | |
3155 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3156 | */ | |
3157 | if (pr_reg_n != pr_res_holder) | |
3158 | __core_scsi3_complete_pro_release(dev, | |
3159 | pr_res_holder->pr_reg_nacl, | |
3160 | dev->dev_pr_res_holder, 0); | |
3161 | /* | |
3162 | * b) Remove the registrations for all I_T nexuses identified | |
3163 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3164 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3165 | * OUT command. If an all registrants persistent reservation | |
3166 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3167 | * is set to zero, then all registrations shall be removed | |
3168 | * except for that of the I_T nexus that is being used for | |
3169 | * the PERSISTENT RESERVE OUT command; | |
3170 | */ | |
3171 | spin_lock(&pr_tmpl->registration_lock); | |
3172 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3173 | &pr_tmpl->registration_list, pr_reg_list) { | |
3174 | ||
3175 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3176 | if (calling_it_nexus) | |
3177 | continue; | |
3178 | ||
3179 | if (pr_reg->pr_res_key != sa_res_key) | |
3180 | continue; | |
3181 | ||
3182 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3183 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3184 | __core_scsi3_free_registration(dev, pr_reg, | |
3185 | (abort) ? &preempt_and_abort_list : NULL, | |
3186 | calling_it_nexus); | |
3187 | /* | |
3188 | * e) Establish a unit attention condition for the initiator | |
3189 | * port associated with every I_T nexus that lost its | |
3190 | * persistent reservation and/or registration, with the | |
3191 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3192 | */ | |
3193 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
3194 | ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
3195 | } | |
3196 | spin_unlock(&pr_tmpl->registration_lock); | |
3197 | /* | |
3198 | * c) Establish a persistent reservation for the preempting | |
3199 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3200 | */ | |
3201 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3202 | (abort) ? &preempt_and_abort_list : NULL, | |
3203 | type, scope, abort); | |
3204 | /* | |
3205 | * d) Process tasks as defined in 5.7.1; | |
3206 | * e) See above.. | |
3207 | * f) If the type or scope has changed, then for every I_T nexus | |
3208 | * whose reservation key was not removed, except for the I_T | |
3209 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3210 | * received, the device server shall establish a unit | |
3211 | * attention condition for the initiator port associated with | |
3212 | * that I_T nexus, with the additional sense code set to | |
3213 | * RESERVATIONS RELEASED. If the type or scope have not | |
3214 | * changed, then no unit attention condition(s) shall be | |
3215 | * established for this reason. | |
3216 | */ | |
3217 | if ((prh_type != type) || (prh_scope != scope)) { | |
3218 | spin_lock(&pr_tmpl->registration_lock); | |
3219 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3220 | &pr_tmpl->registration_list, pr_reg_list) { | |
3221 | ||
3222 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3223 | if (calling_it_nexus) | |
3224 | continue; | |
3225 | ||
3226 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3227 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3228 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3229 | } | |
3230 | spin_unlock(&pr_tmpl->registration_lock); | |
3231 | } | |
3232 | spin_unlock(&dev->dev_reservation_lock); | |
3233 | /* | |
3234 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3235 | * All received CDBs for the matching existing reservation and | |
3236 | * registrations undergo ABORT_TASK logic. | |
3237 | * | |
3238 | * From there, core_scsi3_release_preempt_and_abort() will | |
3239 | * release every registration in the list (which have already | |
3240 | * been removed from the primary pr_reg list), except the | |
3241 | * new persistent reservation holder, the calling Initiator Port. | |
3242 | */ | |
3243 | if (abort) { | |
3244 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); | |
3245 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3246 | pr_reg_n); | |
3247 | } | |
3248 | ||
3249 | if (pr_tmpl->pr_aptpl_active) { | |
3250 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
3251 | &pr_reg_n->pr_aptpl_buf[0], | |
3252 | pr_tmpl->pr_aptpl_buf_len); | |
3253 | if (!(ret)) | |
3254 | printk("SPC-3 PR: Updated APTPL metadata for PREEMPT" | |
3255 | "%s\n", (abort) ? "_AND_ABORT" : ""); | |
3256 | } | |
3257 | ||
3258 | core_scsi3_put_pr_reg(pr_reg_n); | |
3259 | core_scsi3_pr_generation(SE_DEV(cmd)); | |
3260 | return 0; | |
3261 | } | |
3262 | ||
3263 | static int core_scsi3_emulate_pro_preempt( | |
3264 | struct se_cmd *cmd, | |
3265 | int type, | |
3266 | int scope, | |
3267 | u64 res_key, | |
3268 | u64 sa_res_key, | |
3269 | int abort) | |
3270 | { | |
3271 | int ret = 0; | |
3272 | ||
3273 | switch (type) { | |
3274 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3275 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3276 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3277 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3278 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3279 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
3280 | ret = core_scsi3_pro_preempt(cmd, type, scope, | |
3281 | res_key, sa_res_key, abort); | |
3282 | break; | |
3283 | default: | |
3284 | printk(KERN_ERR "SPC-3 PR: Unknown Service Action PREEMPT%s" | |
3285 | " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); | |
3286 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3287 | } | |
3288 | ||
3289 | return ret; | |
3290 | } | |
3291 | ||
3292 | ||
3293 | static int core_scsi3_emulate_pro_register_and_move( | |
3294 | struct se_cmd *cmd, | |
3295 | u64 res_key, | |
3296 | u64 sa_res_key, | |
3297 | int aptpl, | |
3298 | int unreg) | |
3299 | { | |
3300 | struct se_session *se_sess = SE_SESS(cmd); | |
3301 | struct se_device *dev = SE_DEV(cmd); | |
3302 | struct se_dev_entry *se_deve, *dest_se_deve = NULL; | |
3303 | struct se_lun *se_lun = SE_LUN(cmd); | |
3304 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; | |
3305 | struct se_port *se_port; | |
3306 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
3307 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; | |
3308 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; | |
3309 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
3310 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
3311 | unsigned char *initiator_str; | |
3312 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
3313 | u32 tid_len, tmp_tid_len; | |
3314 | int new_reg = 0, type, scope, ret, matching_iname, prf_isid; | |
3315 | unsigned short rtpi; | |
3316 | unsigned char proto_ident; | |
3317 | ||
3318 | if (!(se_sess) || !(se_lun)) { | |
3319 | printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
3320 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
3321 | } | |
3322 | memset(dest_iport, 0, 64); | |
3323 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
3324 | se_tpg = se_sess->se_tpg; | |
3325 | tf_ops = TPG_TFO(se_tpg); | |
3326 | se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; | |
3327 | /* | |
3328 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3329 | * Register behaviors for a REGISTER AND MOVE service action | |
3330 | * | |
3331 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3332 | */ | |
3333 | pr_reg = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl, | |
3334 | se_sess); | |
3335 | if (!(pr_reg)) { | |
3336 | printk(KERN_ERR "SPC-3 PR: Unable to locate PR_REGISTERED" | |
3337 | " *pr_reg for REGISTER_AND_MOVE\n"); | |
3338 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
3339 | } | |
3340 | /* | |
3341 | * The provided reservation key much match the existing reservation key | |
3342 | * provided during this initiator's I_T nexus registration. | |
3343 | */ | |
3344 | if (res_key != pr_reg->pr_res_key) { | |
3345 | printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received" | |
3346 | " res_key: 0x%016Lx does not match existing SA REGISTER" | |
3347 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
3348 | core_scsi3_put_pr_reg(pr_reg); | |
3349 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
3350 | } | |
3351 | /* | |
3352 | * The service active reservation key needs to be non zero | |
3353 | */ | |
3354 | if (!(sa_res_key)) { | |
3355 | printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
3356 | " sa_res_key\n"); | |
3357 | core_scsi3_put_pr_reg(pr_reg); | |
3358 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3359 | } | |
3360 | /* | |
3361 | * Determine the Relative Target Port Identifier where the reservation | |
3362 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3363 | * information. | |
3364 | */ | |
3365 | rtpi = (buf[18] & 0xff) << 8; | |
3366 | rtpi |= buf[19] & 0xff; | |
3367 | tid_len = (buf[20] & 0xff) << 24; | |
3368 | tid_len |= (buf[21] & 0xff) << 16; | |
3369 | tid_len |= (buf[22] & 0xff) << 8; | |
3370 | tid_len |= buf[23] & 0xff; | |
3371 | ||
3372 | if ((tid_len + 24) != cmd->data_length) { | |
3373 | printk(KERN_ERR "SPC-3 PR: Illegal tid_len: %u + 24 byte header" | |
3374 | " does not equal CDB data_length: %u\n", tid_len, | |
3375 | cmd->data_length); | |
3376 | core_scsi3_put_pr_reg(pr_reg); | |
3377 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3378 | } | |
3379 | ||
3380 | spin_lock(&dev->se_port_lock); | |
3381 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3382 | if (se_port->sep_rtpi != rtpi) | |
3383 | continue; | |
3384 | dest_se_tpg = se_port->sep_tpg; | |
3385 | if (!(dest_se_tpg)) | |
3386 | continue; | |
3387 | dest_tf_ops = TPG_TFO(dest_se_tpg); | |
3388 | if (!(dest_tf_ops)) | |
3389 | continue; | |
3390 | ||
3391 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); | |
3392 | smp_mb__after_atomic_inc(); | |
3393 | spin_unlock(&dev->se_port_lock); | |
3394 | ||
3395 | ret = core_scsi3_tpg_depend_item(dest_se_tpg); | |
3396 | if (ret != 0) { | |
3397 | printk(KERN_ERR "core_scsi3_tpg_depend_item() failed" | |
3398 | " for dest_se_tpg\n"); | |
3399 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); | |
3400 | smp_mb__after_atomic_dec(); | |
3401 | core_scsi3_put_pr_reg(pr_reg); | |
3402 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
3403 | } | |
3404 | ||
3405 | spin_lock(&dev->se_port_lock); | |
3406 | break; | |
3407 | } | |
3408 | spin_unlock(&dev->se_port_lock); | |
3409 | ||
3410 | if (!(dest_se_tpg) || (!dest_tf_ops)) { | |
3411 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
3412 | " fabric ops from Relative Target Port Identifier:" | |
3413 | " %hu\n", rtpi); | |
3414 | core_scsi3_put_pr_reg(pr_reg); | |
3415 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3416 | } | |
3417 | proto_ident = (buf[24] & 0x0f); | |
3418 | #if 0 | |
3419 | printk("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" | |
3420 | " 0x%02x\n", proto_ident); | |
3421 | #endif | |
3422 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { | |
3423 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Received" | |
3424 | " proto_ident: 0x%02x does not match ident: 0x%02x" | |
3425 | " from fabric: %s\n", proto_ident, | |
3426 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), | |
3427 | dest_tf_ops->get_fabric_name()); | |
3428 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3429 | goto out; | |
3430 | } | |
3431 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { | |
3432 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Fabric does not" | |
3433 | " containg a valid tpg_parse_pr_out_transport_id" | |
3434 | " function pointer\n"); | |
3435 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
3436 | goto out; | |
3437 | } | |
3438 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, | |
3439 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); | |
3440 | if (!(initiator_str)) { | |
3441 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
3442 | " initiator_str from Transport ID\n"); | |
3443 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3444 | goto out; | |
3445 | } | |
3446 | ||
3447 | printk(KERN_INFO "SPC-3 PR [%s] Extracted initiator %s identifier: %s" | |
3448 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? | |
3449 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3450 | iport_ptr : ""); | |
3451 | /* | |
3452 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3453 | * action specifies a TransportID that is the same as the initiator port | |
3454 | * of the I_T nexus for the command received, then the command shall | |
3455 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3456 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3457 | * IN PARAMETER LIST. | |
3458 | */ | |
3459 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3460 | matching_iname = (!strcmp(initiator_str, | |
3461 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
3462 | if (!(matching_iname)) | |
3463 | goto after_iport_check; | |
3464 | ||
3465 | if (!(iport_ptr) || !(pr_reg->isid_present_at_reg)) { | |
3466 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
3467 | " matches: %s on received I_T Nexus\n", initiator_str, | |
3468 | pr_reg_nacl->initiatorname); | |
3469 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3470 | goto out; | |
3471 | } | |
3472 | if (!(strcmp(iport_ptr, pr_reg->pr_reg_isid))) { | |
3473 | printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
3474 | " matches: %s %s on received I_T Nexus\n", | |
3475 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3476 | pr_reg->pr_reg_isid); | |
3477 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3478 | goto out; | |
3479 | } | |
3480 | after_iport_check: | |
3481 | /* | |
3482 | * Locate the destination struct se_node_acl from the received Transport ID | |
3483 | */ | |
3484 | spin_lock_bh(&dest_se_tpg->acl_node_lock); | |
3485 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, | |
3486 | initiator_str); | |
3487 | if (dest_node_acl) { | |
3488 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
3489 | smp_mb__after_atomic_inc(); | |
3490 | } | |
3491 | spin_unlock_bh(&dest_se_tpg->acl_node_lock); | |
3492 | ||
3493 | if (!(dest_node_acl)) { | |
3494 | printk(KERN_ERR "Unable to locate %s dest_node_acl for" | |
3495 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), | |
3496 | initiator_str); | |
3497 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3498 | goto out; | |
3499 | } | |
3500 | ret = core_scsi3_nodeacl_depend_item(dest_node_acl); | |
3501 | if (ret != 0) { | |
3502 | printk(KERN_ERR "core_scsi3_nodeacl_depend_item() for" | |
3503 | " dest_node_acl\n"); | |
3504 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
3505 | smp_mb__after_atomic_dec(); | |
3506 | dest_node_acl = NULL; | |
3507 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
3508 | goto out; | |
3509 | } | |
3510 | #if 0 | |
3511 | printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" | |
3512 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), | |
3513 | dest_node_acl->initiatorname); | |
3514 | #endif | |
3515 | /* | |
3516 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3517 | * PORT IDENTIFIER. | |
3518 | */ | |
3519 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
3520 | if (!(dest_se_deve)) { | |
3521 | printk(KERN_ERR "Unable to locate %s dest_se_deve from RTPI:" | |
3522 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); | |
3523 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3524 | goto out; | |
3525 | } | |
3526 | ||
3527 | ret = core_scsi3_lunacl_depend_item(dest_se_deve); | |
3528 | if (ret < 0) { | |
3529 | printk(KERN_ERR "core_scsi3_lunacl_depend_item() failed\n"); | |
3530 | atomic_dec(&dest_se_deve->pr_ref_count); | |
3531 | smp_mb__after_atomic_dec(); | |
3532 | dest_se_deve = NULL; | |
3533 | ret = PYX_TRANSPORT_LU_COMM_FAILURE; | |
3534 | goto out; | |
3535 | } | |
3536 | #if 0 | |
3537 | printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" | |
3538 | " ACL for dest_se_deve->mapped_lun: %u\n", | |
3539 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3540 | dest_se_deve->mapped_lun); | |
3541 | #endif | |
3542 | /* | |
3543 | * A persistent reservation needs to already existing in order to | |
3544 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3545 | */ | |
3546 | spin_lock(&dev->dev_reservation_lock); | |
3547 | pr_res_holder = dev->dev_pr_res_holder; | |
3548 | if (!(pr_res_holder)) { | |
3549 | printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
3550 | " currently held\n"); | |
3551 | spin_unlock(&dev->dev_reservation_lock); | |
3552 | ret = PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3553 | goto out; | |
3554 | } | |
3555 | /* | |
3556 | * The received on I_T Nexus must be the reservation holder. | |
3557 | * | |
3558 | * From spc4r17 section 5.7.8 Table 50 -- | |
3559 | * Register behaviors for a REGISTER AND MOVE service action | |
3560 | */ | |
3561 | if (pr_res_holder != pr_reg) { | |
3562 | printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Calling I_T" | |
3563 | " Nexus is not reservation holder\n"); | |
3564 | spin_unlock(&dev->dev_reservation_lock); | |
3565 | ret = PYX_TRANSPORT_RESERVATION_CONFLICT; | |
3566 | goto out; | |
3567 | } | |
3568 | /* | |
3569 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3570 | * | |
3571 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3572 | * action is received and the established persistent reservation is a | |
3573 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3574 | * All Registrants type reservation, then the command shall be completed | |
3575 | * with RESERVATION CONFLICT status. | |
3576 | */ | |
3577 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3578 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
3579 | printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Unable to move" | |
3580 | " reservation for type: %s\n", | |
3581 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3582 | spin_unlock(&dev->dev_reservation_lock); | |
3583 | ret = PYX_TRANSPORT_RESERVATION_CONFLICT; | |
3584 | goto out; | |
3585 | } | |
3586 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3587 | /* | |
3588 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3589 | */ | |
3590 | type = pr_res_holder->pr_res_type; | |
3591 | scope = pr_res_holder->pr_res_type; | |
3592 | /* | |
3593 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3594 | * RESERVATION KEY field with the I_T nexus specified as the | |
3595 | * destination of the register and move, where: | |
3596 | * A) The I_T nexus is specified by the TransportID and the | |
3597 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3598 | * B) Regardless of the TransportID format used, the association for | |
3599 | * the initiator port is based on either the initiator port name | |
3600 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3601 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3602 | * transport protocols where port names are not required; | |
3603 | * d) Register the reservation key specified in the SERVICE ACTION | |
3604 | * RESERVATION KEY field; | |
3605 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3606 | * RESERVATION KEY field and associated information; | |
3607 | * | |
3608 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3609 | * register an I_T nexus that is already registered with the same | |
3610 | * reservation key or a different reservation key. | |
3611 | */ | |
3612 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3613 | iport_ptr); | |
3614 | if (!(dest_pr_reg)) { | |
3615 | ret = core_scsi3_alloc_registration(SE_DEV(cmd), | |
3616 | dest_node_acl, dest_se_deve, iport_ptr, | |
3617 | sa_res_key, 0, aptpl, 2, 1); | |
3618 | if (ret != 0) { | |
3619 | spin_unlock(&dev->dev_reservation_lock); | |
3620 | ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3621 | goto out; | |
3622 | } | |
3623 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3624 | iport_ptr); | |
3625 | new_reg = 1; | |
3626 | } | |
3627 | /* | |
3628 | * f) Release the persistent reservation for the persistent reservation | |
3629 | * holder (i.e., the I_T nexus on which the | |
3630 | */ | |
3631 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
3632 | dev->dev_pr_res_holder, 0); | |
3633 | /* | |
3634 | * g) Move the persistent reservation to the specified I_T nexus using | |
3635 | * the same scope and type as the persistent reservation released in | |
3636 | * item f); and | |
3637 | */ | |
3638 | dev->dev_pr_res_holder = dest_pr_reg; | |
3639 | dest_pr_reg->pr_res_holder = 1; | |
3640 | dest_pr_reg->pr_res_type = type; | |
3641 | pr_reg->pr_res_scope = scope; | |
3642 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
3643 | PR_REG_ISID_ID_LEN); | |
3644 | /* | |
3645 | * Increment PRGeneration for existing registrations.. | |
3646 | */ | |
3647 | if (!(new_reg)) | |
3648 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; | |
3649 | spin_unlock(&dev->dev_reservation_lock); | |
3650 | ||
3651 | printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" | |
3652 | " created new reservation holder TYPE: %s on object RTPI:" | |
3653 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3654 | core_scsi3_pr_dump_type(type), rtpi, | |
3655 | dest_pr_reg->pr_res_generation); | |
3656 | printk(KERN_INFO "SPC-3 PR Successfully moved reservation from" | |
3657 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", | |
3658 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
3659 | (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), | |
3660 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? | |
3661 | iport_ptr : ""); | |
3662 | /* | |
3663 | * It is now safe to release configfs group dependencies for destination | |
3664 | * of Transport ID Initiator Device/Port Identifier | |
3665 | */ | |
3666 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3667 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3668 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3669 | /* | |
3670 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3671 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3672 | */ | |
3673 | if (unreg) { | |
3674 | spin_lock(&pr_tmpl->registration_lock); | |
3675 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3676 | spin_unlock(&pr_tmpl->registration_lock); | |
3677 | } else | |
3678 | core_scsi3_put_pr_reg(pr_reg); | |
3679 | ||
3680 | /* | |
3681 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
3682 | * write out the updated metadata to struct file for this SCSI device. | |
3683 | */ | |
3684 | if (!(aptpl)) { | |
3685 | pr_tmpl->pr_aptpl_active = 0; | |
3686 | core_scsi3_update_and_write_aptpl(SE_DEV(cmd), NULL, 0); | |
3687 | printk("SPC-3 PR: Set APTPL Bit Deactivated for" | |
3688 | " REGISTER_AND_MOVE\n"); | |
3689 | } else { | |
3690 | pr_tmpl->pr_aptpl_active = 1; | |
3691 | ret = core_scsi3_update_and_write_aptpl(SE_DEV(cmd), | |
3692 | &dest_pr_reg->pr_aptpl_buf[0], | |
3693 | pr_tmpl->pr_aptpl_buf_len); | |
3694 | if (!(ret)) | |
3695 | printk("SPC-3 PR: Set APTPL Bit Activated for" | |
3696 | " REGISTER_AND_MOVE\n"); | |
3697 | } | |
3698 | ||
3699 | core_scsi3_put_pr_reg(dest_pr_reg); | |
3700 | return 0; | |
3701 | out: | |
3702 | if (dest_se_deve) | |
3703 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3704 | if (dest_node_acl) | |
3705 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3706 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3707 | core_scsi3_put_pr_reg(pr_reg); | |
3708 | return ret; | |
3709 | } | |
3710 | ||
3711 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3712 | { | |
3713 | unsigned int __v1, __v2; | |
3714 | ||
3715 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3716 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3717 | ||
3718 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3719 | } | |
3720 | ||
3721 | /* | |
3722 | * See spc4r17 section 6.14 Table 170 | |
3723 | */ | |
3724 | static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) | |
3725 | { | |
3726 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
3727 | u64 res_key, sa_res_key; | |
3728 | int sa, scope, type, aptpl; | |
3729 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
3730 | /* | |
3731 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3732 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3733 | */ | |
3734 | if (!(SE_SESS(cmd))) | |
3735 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
3736 | ||
3737 | if (cmd->data_length < 24) { | |
3738 | printk(KERN_WARNING "SPC-PR: Recieved PR OUT parameter list" | |
3739 | " length too small: %u\n", cmd->data_length); | |
3740 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3741 | } | |
3742 | /* | |
3743 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3744 | */ | |
3745 | sa = (cdb[1] & 0x1f); | |
3746 | scope = (cdb[2] & 0xf0); | |
3747 | type = (cdb[2] & 0x0f); | |
3748 | /* | |
3749 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3750 | */ | |
3751 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3752 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3753 | /* | |
3754 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3755 | * SCSI TransportIDs. | |
3756 | */ | |
3757 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3758 | spec_i_pt = (buf[20] & 0x08); | |
3759 | all_tg_pt = (buf[20] & 0x04); | |
3760 | aptpl = (buf[20] & 0x01); | |
3761 | } else { | |
3762 | aptpl = (buf[17] & 0x01); | |
3763 | unreg = (buf[17] & 0x02); | |
3764 | } | |
3765 | /* | |
3766 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3767 | */ | |
3768 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) | |
3769 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3770 | /* | |
3771 | * From spc4r17 section 6.14: | |
3772 | * | |
3773 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3774 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3775 | * the command shall be terminated with CHECK CONDITION status, with | |
3776 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3777 | * code set to PARAMETER LIST LENGTH ERROR. | |
3778 | */ | |
3779 | if (!(spec_i_pt) && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && | |
3780 | (cmd->data_length != 24)) { | |
3781 | printk(KERN_WARNING "SPC-PR: Recieved PR OUT illegal parameter" | |
3782 | " list length: %u\n", cmd->data_length); | |
3783 | return PYX_TRANSPORT_INVALID_PARAMETER_LIST; | |
3784 | } | |
3785 | /* | |
3786 | * (core_scsi3_emulate_pro_* function parameters | |
3787 | * are defined by spc4r17 Table 174: | |
3788 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3789 | */ | |
3790 | switch (sa) { | |
3791 | case PRO_REGISTER: | |
3792 | return core_scsi3_emulate_pro_register(cmd, | |
3793 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); | |
3794 | case PRO_RESERVE: | |
3795 | return core_scsi3_emulate_pro_reserve(cmd, | |
3796 | type, scope, res_key); | |
3797 | case PRO_RELEASE: | |
3798 | return core_scsi3_emulate_pro_release(cmd, | |
3799 | type, scope, res_key); | |
3800 | case PRO_CLEAR: | |
3801 | return core_scsi3_emulate_pro_clear(cmd, res_key); | |
3802 | case PRO_PREEMPT: | |
3803 | return core_scsi3_emulate_pro_preempt(cmd, type, scope, | |
3804 | res_key, sa_res_key, 0); | |
3805 | case PRO_PREEMPT_AND_ABORT: | |
3806 | return core_scsi3_emulate_pro_preempt(cmd, type, scope, | |
3807 | res_key, sa_res_key, 1); | |
3808 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
3809 | return core_scsi3_emulate_pro_register(cmd, | |
3810 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); | |
3811 | case PRO_REGISTER_AND_MOVE: | |
3812 | return core_scsi3_emulate_pro_register_and_move(cmd, res_key, | |
3813 | sa_res_key, aptpl, unreg); | |
3814 | default: | |
3815 | printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service" | |
3816 | " action: 0x%02x\n", cdb[1] & 0x1f); | |
3817 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3818 | } | |
3819 | ||
3820 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3821 | } | |
3822 | ||
3823 | /* | |
3824 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3825 | * | |
3826 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3827 | */ | |
3828 | static int core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
3829 | { | |
3830 | struct se_device *se_dev = SE_DEV(cmd); | |
3831 | struct se_subsystem_dev *su_dev = SU_DEV(se_dev); | |
3832 | struct t10_pr_registration *pr_reg; | |
3833 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
3834 | u32 add_len = 0, off = 8; | |
3835 | ||
3836 | if (cmd->data_length < 8) { | |
3837 | printk(KERN_ERR "PRIN SA READ_KEYS SCSI Data Length: %u" | |
3838 | " too small\n", cmd->data_length); | |
3839 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3840 | } | |
3841 | ||
3842 | buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff); | |
3843 | buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff); | |
3844 | buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff); | |
3845 | buf[3] = (T10_RES(su_dev)->pr_generation & 0xff); | |
3846 | ||
3847 | spin_lock(&T10_RES(su_dev)->registration_lock); | |
3848 | list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list, | |
3849 | pr_reg_list) { | |
3850 | /* | |
3851 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3852 | * next reservation key list descriptor. | |
3853 | */ | |
3854 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3855 | break; | |
3856 | ||
3857 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3858 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3859 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3860 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3861 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3862 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3863 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3864 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3865 | ||
3866 | add_len += 8; | |
3867 | } | |
3868 | spin_unlock(&T10_RES(su_dev)->registration_lock); | |
3869 | ||
3870 | buf[4] = ((add_len >> 24) & 0xff); | |
3871 | buf[5] = ((add_len >> 16) & 0xff); | |
3872 | buf[6] = ((add_len >> 8) & 0xff); | |
3873 | buf[7] = (add_len & 0xff); | |
3874 | ||
3875 | return 0; | |
3876 | } | |
3877 | ||
3878 | /* | |
3879 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3880 | * | |
3881 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3882 | */ | |
3883 | static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
3884 | { | |
3885 | struct se_device *se_dev = SE_DEV(cmd); | |
3886 | struct se_subsystem_dev *su_dev = SU_DEV(se_dev); | |
3887 | struct t10_pr_registration *pr_reg; | |
3888 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
3889 | u64 pr_res_key; | |
3890 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
3891 | ||
3892 | if (cmd->data_length < 8) { | |
3893 | printk(KERN_ERR "PRIN SA READ_RESERVATIONS SCSI Data Length: %u" | |
3894 | " too small\n", cmd->data_length); | |
3895 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3896 | } | |
3897 | ||
3898 | buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff); | |
3899 | buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff); | |
3900 | buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff); | |
3901 | buf[3] = (T10_RES(su_dev)->pr_generation & 0xff); | |
3902 | ||
3903 | spin_lock(&se_dev->dev_reservation_lock); | |
3904 | pr_reg = se_dev->dev_pr_res_holder; | |
3905 | if ((pr_reg)) { | |
3906 | /* | |
3907 | * Set the hardcoded Additional Length | |
3908 | */ | |
3909 | buf[4] = ((add_len >> 24) & 0xff); | |
3910 | buf[5] = ((add_len >> 16) & 0xff); | |
3911 | buf[6] = ((add_len >> 8) & 0xff); | |
3912 | buf[7] = (add_len & 0xff); | |
3913 | ||
3914 | if (cmd->data_length < 22) { | |
3915 | spin_unlock(&se_dev->dev_reservation_lock); | |
3916 | return 0; | |
3917 | } | |
3918 | /* | |
3919 | * Set the Reservation key. | |
3920 | * | |
3921 | * From spc4r17, section 5.7.10: | |
3922 | * A persistent reservation holder has its reservation key | |
3923 | * returned in the parameter data from a PERSISTENT | |
3924 | * RESERVE IN command with READ RESERVATION service action as | |
3925 | * follows: | |
3926 | * a) For a persistent reservation of the type Write Exclusive | |
3927 | * - All Registrants or Exclusive Access  All Regitrants, | |
3928 | * the reservation key shall be set to zero; or | |
3929 | * b) For all other persistent reservation types, the | |
3930 | * reservation key shall be set to the registered | |
3931 | * reservation key for the I_T nexus that holds the | |
3932 | * persistent reservation. | |
3933 | */ | |
3934 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3935 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3936 | pr_res_key = 0; | |
3937 | else | |
3938 | pr_res_key = pr_reg->pr_res_key; | |
3939 | ||
3940 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
3941 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
3942 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
3943 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
3944 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
3945 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
3946 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
3947 | buf[15] = (pr_res_key & 0xff); | |
3948 | /* | |
3949 | * Set the SCOPE and TYPE | |
3950 | */ | |
3951 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3952 | (pr_reg->pr_res_type & 0x0f); | |
3953 | } | |
3954 | spin_unlock(&se_dev->dev_reservation_lock); | |
3955 | ||
3956 | return 0; | |
3957 | } | |
3958 | ||
3959 | /* | |
3960 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3961 | * | |
3962 | * See spc4r17 section 6.13.4 Table 165 | |
3963 | */ | |
3964 | static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
3965 | { | |
3966 | struct se_device *dev = SE_DEV(cmd); | |
3967 | struct t10_reservation_template *pr_tmpl = &SU_DEV(dev)->t10_reservation; | |
3968 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
3969 | u16 add_len = 8; /* Hardcoded to 8. */ | |
3970 | ||
3971 | if (cmd->data_length < 6) { | |
3972 | printk(KERN_ERR "PRIN SA REPORT_CAPABILITIES SCSI Data Length:" | |
3973 | " %u too small\n", cmd->data_length); | |
3974 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
3975 | } | |
3976 | ||
3977 | buf[0] = ((add_len << 8) & 0xff); | |
3978 | buf[1] = (add_len & 0xff); | |
3979 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
3980 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3981 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3982 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3983 | /* | |
3984 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3985 | * set the TMV: Task Mask Valid bit. | |
3986 | */ | |
3987 | buf[3] |= 0x80; | |
3988 | /* | |
3989 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3990 | */ | |
3991 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3992 | /* | |
3993 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3994 | */ | |
3995 | if (pr_tmpl->pr_aptpl_active) | |
3996 | buf[3] |= 0x01; | |
3997 | /* | |
3998 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3999 | */ | |
4000 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4001 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
4002 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
4003 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
4004 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
4005 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4006 | ||
4007 | return 0; | |
4008 | } | |
4009 | ||
4010 | /* | |
4011 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
4012 | * | |
4013 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
4014 | */ | |
4015 | static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
4016 | { | |
4017 | struct se_device *se_dev = SE_DEV(cmd); | |
4018 | struct se_node_acl *se_nacl; | |
4019 | struct se_subsystem_dev *su_dev = SU_DEV(se_dev); | |
4020 | struct se_portal_group *se_tpg; | |
4021 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
4022 | struct t10_reservation_template *pr_tmpl = &SU_DEV(se_dev)->t10_reservation; | |
4023 | unsigned char *buf = (unsigned char *)T_TASK(cmd)->t_task_buf; | |
4024 | u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; | |
4025 | u32 off = 8; /* off into first Full Status descriptor */ | |
4026 | int format_code = 0; | |
4027 | ||
4028 | if (cmd->data_length < 8) { | |
4029 | printk(KERN_ERR "PRIN SA READ_FULL_STATUS SCSI Data Length: %u" | |
4030 | " too small\n", cmd->data_length); | |
4031 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
4032 | } | |
4033 | ||
4034 | buf[0] = ((T10_RES(su_dev)->pr_generation >> 24) & 0xff); | |
4035 | buf[1] = ((T10_RES(su_dev)->pr_generation >> 16) & 0xff); | |
4036 | buf[2] = ((T10_RES(su_dev)->pr_generation >> 8) & 0xff); | |
4037 | buf[3] = (T10_RES(su_dev)->pr_generation & 0xff); | |
4038 | ||
4039 | spin_lock(&pr_tmpl->registration_lock); | |
4040 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
4041 | &pr_tmpl->registration_list, pr_reg_list) { | |
4042 | ||
4043 | se_nacl = pr_reg->pr_reg_nacl; | |
4044 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
4045 | add_desc_len = 0; | |
4046 | ||
4047 | atomic_inc(&pr_reg->pr_res_holders); | |
4048 | smp_mb__after_atomic_inc(); | |
4049 | spin_unlock(&pr_tmpl->registration_lock); | |
4050 | /* | |
4051 | * Determine expected length of $FABRIC_MOD specific | |
4052 | * TransportID full status descriptor.. | |
4053 | */ | |
4054 | exp_desc_len = TPG_TFO(se_tpg)->tpg_get_pr_transport_id_len( | |
4055 | se_tpg, se_nacl, pr_reg, &format_code); | |
4056 | ||
4057 | if ((exp_desc_len + add_len) > cmd->data_length) { | |
4058 | printk(KERN_WARNING "SPC-3 PRIN READ_FULL_STATUS ran" | |
4059 | " out of buffer: %d\n", cmd->data_length); | |
4060 | spin_lock(&pr_tmpl->registration_lock); | |
4061 | atomic_dec(&pr_reg->pr_res_holders); | |
4062 | smp_mb__after_atomic_dec(); | |
4063 | break; | |
4064 | } | |
4065 | /* | |
4066 | * Set RESERVATION KEY | |
4067 | */ | |
4068 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4069 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4070 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4071 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4072 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4073 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4074 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4075 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4076 | off += 4; /* Skip Over Reserved area */ | |
4077 | ||
4078 | /* | |
4079 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4080 | */ | |
4081 | if (pr_reg->pr_reg_all_tg_pt) | |
4082 | buf[off] = 0x02; | |
4083 | /* | |
4084 | * The struct se_lun pointer will be present for the | |
4085 | * reservation holder for PR_HOLDER bit. | |
4086 | * | |
4087 | * Also, if this registration is the reservation | |
4088 | * holder, fill in SCOPE and TYPE in the next byte. | |
4089 | */ | |
4090 | if (pr_reg->pr_res_holder) { | |
4091 | buf[off++] |= 0x01; | |
4092 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4093 | (pr_reg->pr_res_type & 0x0f); | |
4094 | } else | |
4095 | off += 2; | |
4096 | ||
4097 | off += 4; /* Skip over reserved area */ | |
4098 | /* | |
4099 | * From spc4r17 6.3.15: | |
4100 | * | |
4101 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4102 | * IDENTIFIER field contains the relative port identifier (see | |
4103 | * 3.1.120) of the target port that is part of the I_T nexus | |
4104 | * described by this full status descriptor. If the ALL_TG_PT | |
4105 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4106 | * IDENTIFIER field are not defined by this standard. | |
4107 | */ | |
4108 | if (!(pr_reg->pr_reg_all_tg_pt)) { | |
4109 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; | |
4110 | ||
4111 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
4112 | buf[off++] = (port->sep_rtpi & 0xff); | |
4113 | } else | |
4114 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ | |
4115 | ||
4116 | /* | |
4117 | * Now, have the $FABRIC_MOD fill in the protocol identifier | |
4118 | */ | |
4119 | desc_len = TPG_TFO(se_tpg)->tpg_get_pr_transport_id(se_tpg, | |
4120 | se_nacl, pr_reg, &format_code, &buf[off+4]); | |
4121 | ||
4122 | spin_lock(&pr_tmpl->registration_lock); | |
4123 | atomic_dec(&pr_reg->pr_res_holders); | |
4124 | smp_mb__after_atomic_dec(); | |
4125 | /* | |
4126 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4127 | */ | |
4128 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4129 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4130 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4131 | buf[off++] = (desc_len & 0xff); | |
4132 | /* | |
4133 | * Size of full desctipor header minus TransportID | |
4134 | * containing $FABRIC_MOD specific) initiator device/port | |
4135 | * WWN information. | |
4136 | * | |
4137 | * See spc4r17 Section 6.13.5 Table 169 | |
4138 | */ | |
4139 | add_desc_len = (24 + desc_len); | |
4140 | ||
4141 | off += desc_len; | |
4142 | add_len += add_desc_len; | |
4143 | } | |
4144 | spin_unlock(&pr_tmpl->registration_lock); | |
4145 | /* | |
4146 | * Set ADDITIONAL_LENGTH | |
4147 | */ | |
4148 | buf[4] = ((add_len >> 24) & 0xff); | |
4149 | buf[5] = ((add_len >> 16) & 0xff); | |
4150 | buf[6] = ((add_len >> 8) & 0xff); | |
4151 | buf[7] = (add_len & 0xff); | |
4152 | ||
4153 | return 0; | |
4154 | } | |
4155 | ||
4156 | static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb) | |
4157 | { | |
4158 | switch (cdb[1] & 0x1f) { | |
4159 | case PRI_READ_KEYS: | |
4160 | return core_scsi3_pri_read_keys(cmd); | |
4161 | case PRI_READ_RESERVATION: | |
4162 | return core_scsi3_pri_read_reservation(cmd); | |
4163 | case PRI_REPORT_CAPABILITIES: | |
4164 | return core_scsi3_pri_report_capabilities(cmd); | |
4165 | case PRI_READ_FULL_STATUS: | |
4166 | return core_scsi3_pri_read_full_status(cmd); | |
4167 | default: | |
4168 | printk(KERN_ERR "Unknown PERSISTENT_RESERVE_IN service" | |
4169 | " action: 0x%02x\n", cdb[1] & 0x1f); | |
4170 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
4171 | } | |
4172 | ||
4173 | } | |
4174 | ||
4175 | int core_scsi3_emulate_pr(struct se_cmd *cmd) | |
4176 | { | |
4177 | unsigned char *cdb = &T_TASK(cmd)->t_task_cdb[0]; | |
4178 | struct se_device *dev = cmd->se_dev; | |
4179 | /* | |
4180 | * Following spc2r20 5.5.1 Reservations overview: | |
4181 | * | |
4182 | * If a logical unit has been reserved by any RESERVE command and is | |
4183 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4184 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4185 | * initiator or service action and shall terminate with a RESERVATION | |
4186 | * CONFLICT status. | |
4187 | */ | |
4188 | if (dev->dev_flags & DF_SPC2_RESERVATIONS) { | |
4189 | printk(KERN_ERR "Received PERSISTENT_RESERVE CDB while legacy" | |
4190 | " SPC-2 reservation is held, returning" | |
4191 | " RESERVATION_CONFLICT\n"); | |
4192 | return PYX_TRANSPORT_RESERVATION_CONFLICT; | |
4193 | } | |
4194 | ||
4195 | return (cdb[0] == PERSISTENT_RESERVE_OUT) ? | |
4196 | core_scsi3_emulate_pr_out(cmd, cdb) : | |
4197 | core_scsi3_emulate_pr_in(cmd, cdb); | |
4198 | } | |
4199 | ||
4200 | static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) | |
4201 | { | |
4202 | return 0; | |
4203 | } | |
4204 | ||
4205 | static int core_pt_seq_non_holder( | |
4206 | struct se_cmd *cmd, | |
4207 | unsigned char *cdb, | |
4208 | u32 pr_reg_type) | |
4209 | { | |
4210 | return 0; | |
4211 | } | |
4212 | ||
4213 | int core_setup_reservations(struct se_device *dev, int force_pt) | |
4214 | { | |
4215 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; | |
4216 | struct t10_reservation_template *rest = &su_dev->t10_reservation; | |
4217 | /* | |
4218 | * If this device is from Target_Core_Mod/pSCSI, use the reservations | |
4219 | * of the Underlying SCSI hardware. In Linux/SCSI terms, this can | |
4220 | * cause a problem because libata and some SATA RAID HBAs appear | |
4221 | * under Linux/SCSI, but to emulate reservations themselves. | |
4222 | */ | |
4223 | if (((TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && | |
4224 | !(DEV_ATTRIB(dev)->emulate_reservations)) || force_pt) { | |
4225 | rest->res_type = SPC_PASSTHROUGH; | |
4226 | rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; | |
4227 | rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; | |
4228 | printk(KERN_INFO "%s: Using SPC_PASSTHROUGH, no reservation" | |
4229 | " emulation\n", TRANSPORT(dev)->name); | |
4230 | return 0; | |
4231 | } | |
4232 | /* | |
4233 | * If SPC-3 or above is reported by real or emulated struct se_device, | |
4234 | * use emulated Persistent Reservations. | |
4235 | */ | |
4236 | if (TRANSPORT(dev)->get_device_rev(dev) >= SCSI_3) { | |
4237 | rest->res_type = SPC3_PERSISTENT_RESERVATIONS; | |
4238 | rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; | |
4239 | rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; | |
4240 | printk(KERN_INFO "%s: Using SPC3_PERSISTENT_RESERVATIONS" | |
4241 | " emulation\n", TRANSPORT(dev)->name); | |
4242 | } else { | |
4243 | rest->res_type = SPC2_RESERVATIONS; | |
4244 | rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; | |
4245 | rest->pr_ops.t10_seq_non_holder = | |
4246 | &core_scsi2_reservation_seq_non_holder; | |
4247 | printk(KERN_INFO "%s: Using SPC2_RESERVATIONS emulation\n", | |
4248 | TRANSPORT(dev)->name); | |
4249 | } | |
4250 | ||
4251 | return 0; | |
4252 | } |