Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_pr.c | |
3 | * | |
4 | * This file contains SPC-3 compliant persistent reservations and | |
5 | * legacy SPC-2 reservations with compatible reservation handling (CRH=1) | |
6 | * | |
fd9a11d7 | 7 | * (c) Copyright 2009-2012 RisingTide Systems LLC. |
c66ac9db NB |
8 | * |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
c66ac9db NB |
27 | #include <linux/slab.h> |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/list.h> | |
30 | #include <scsi/scsi.h> | |
31 | #include <scsi/scsi_cmnd.h> | |
32 | #include <asm/unaligned.h> | |
33 | ||
34 | #include <target/target_core_base.h> | |
c4795fb2 CH |
35 | #include <target/target_core_backend.h> |
36 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
37 | #include <target/target_core_configfs.h> |
38 | ||
e26d99ae | 39 | #include "target_core_internal.h" |
c66ac9db NB |
40 | #include "target_core_pr.h" |
41 | #include "target_core_ua.h" | |
42 | ||
43 | /* | |
44 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) | |
45 | */ | |
46 | struct pr_transport_id_holder { | |
47 | int dest_local_nexus; | |
48 | struct t10_pr_registration *dest_pr_reg; | |
49 | struct se_portal_group *dest_tpg; | |
50 | struct se_node_acl *dest_node_acl; | |
51 | struct se_dev_entry *dest_se_deve; | |
52 | struct list_head dest_list; | |
53 | }; | |
54 | ||
55 | int core_pr_dump_initiator_port( | |
56 | struct t10_pr_registration *pr_reg, | |
57 | char *buf, | |
58 | u32 size) | |
59 | { | |
6708bb27 | 60 | if (!pr_reg->isid_present_at_reg) |
c66ac9db NB |
61 | return 0; |
62 | ||
63 | snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]); | |
64 | return 1; | |
65 | } | |
66 | ||
67 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, | |
68 | struct t10_pr_registration *, int); | |
69 | ||
de103c93 CH |
70 | static sense_reason_t |
71 | target_scsi2_reservation_check(struct se_cmd *cmd) | |
c66ac9db | 72 | { |
d977f437 CH |
73 | struct se_device *dev = cmd->se_dev; |
74 | struct se_session *sess = cmd->se_sess; | |
75 | ||
76 | switch (cmd->t_task_cdb[0]) { | |
c66ac9db NB |
77 | case INQUIRY: |
78 | case RELEASE: | |
79 | case RELEASE_10: | |
80 | return 0; | |
81 | default: | |
d977f437 | 82 | break; |
c66ac9db NB |
83 | } |
84 | ||
d977f437 | 85 | if (!dev->dev_reserved_node_acl || !sess) |
c66ac9db NB |
86 | return 0; |
87 | ||
d977f437 | 88 | if (dev->dev_reserved_node_acl != sess->se_node_acl) |
de103c93 | 89 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
90 | |
91 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
92 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) | |
de103c93 | 93 | return TCM_RESERVATION_CONFLICT; |
c66ac9db | 94 | } |
c66ac9db | 95 | |
d977f437 | 96 | return 0; |
c66ac9db NB |
97 | } |
98 | ||
eacac00c CH |
99 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
100 | struct se_node_acl *, struct se_session *); | |
101 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
102 | ||
087a03b3 | 103 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
eacac00c CH |
104 | { |
105 | struct se_session *se_sess = cmd->se_sess; | |
0fd97ccf | 106 | struct se_device *dev = cmd->se_dev; |
eacac00c | 107 | struct t10_pr_registration *pr_reg; |
0fd97ccf | 108 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
eacac00c CH |
109 | int conflict = 0; |
110 | ||
eacac00c CH |
111 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
112 | se_sess); | |
113 | if (pr_reg) { | |
114 | /* | |
115 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
116 | * behavior | |
117 | * | |
118 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
119 | * status, but no reservation shall be established and the | |
120 | * persistent reservation shall not be changed, if the command | |
121 | * is received from a) and b) below. | |
122 | * | |
123 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
124 | * status, but the persistent reservation shall not be released, | |
125 | * if the command is received from a) and b) | |
126 | * | |
127 | * a) An I_T nexus that is a persistent reservation holder; or | |
128 | * b) An I_T nexus that is registered if a registrants only or | |
129 | * all registrants type persistent reservation is present. | |
130 | * | |
131 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
132 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
133 | * as defined in SPC-2. | |
134 | */ | |
135 | if (pr_reg->pr_res_holder) { | |
136 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 137 | return 1; |
eacac00c CH |
138 | } |
139 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
140 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
141 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
142 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
143 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 144 | return 1; |
eacac00c CH |
145 | } |
146 | core_scsi3_put_pr_reg(pr_reg); | |
147 | conflict = 1; | |
148 | } else { | |
149 | /* | |
150 | * Following spc2r20 5.5.1 Reservations overview: | |
151 | * | |
152 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
153 | * command with the REGISTER or the REGISTER AND IGNORE | |
154 | * EXISTING KEY service action and is still registered by any | |
155 | * initiator, all RESERVE commands and all RELEASE commands | |
156 | * regardless of initiator shall conflict and shall terminate | |
157 | * with a RESERVATION CONFLICT status. | |
158 | */ | |
159 | spin_lock(&pr_tmpl->registration_lock); | |
160 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
161 | spin_unlock(&pr_tmpl->registration_lock); | |
162 | } | |
163 | ||
164 | if (conflict) { | |
165 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
166 | " while active SPC-3 registrations exist," | |
167 | " returning RESERVATION_CONFLICT\n"); | |
087a03b3 | 168 | return -EBUSY; |
eacac00c CH |
169 | } |
170 | ||
087a03b3 | 171 | return 0; |
eacac00c CH |
172 | } |
173 | ||
de103c93 CH |
174 | sense_reason_t |
175 | target_scsi2_reservation_release(struct se_cmd *cmd) | |
c66ac9db NB |
176 | { |
177 | struct se_device *dev = cmd->se_dev; | |
178 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 179 | struct se_portal_group *tpg; |
de103c93 | 180 | int rc; |
c66ac9db | 181 | |
609234e3 | 182 | if (!sess || !sess->se_tpg) |
d29a5b6a | 183 | goto out; |
087a03b3 NB |
184 | rc = target_check_scsi2_reservation_conflict(cmd); |
185 | if (rc == 1) | |
d29a5b6a | 186 | goto out; |
de103c93 CH |
187 | if (rc < 0) |
188 | return TCM_RESERVATION_CONFLICT; | |
c66ac9db NB |
189 | |
190 | spin_lock(&dev->dev_reservation_lock); | |
d29a5b6a CH |
191 | if (!dev->dev_reserved_node_acl || !sess) |
192 | goto out_unlock; | |
193 | ||
194 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
195 | goto out_unlock; | |
c66ac9db | 196 | |
edc318d9 BK |
197 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
198 | goto out_unlock; | |
199 | ||
c66ac9db | 200 | dev->dev_reserved_node_acl = NULL; |
0fd97ccf CH |
201 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
202 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
c66ac9db | 203 | dev->dev_res_bin_isid = 0; |
0fd97ccf | 204 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 205 | } |
609234e3 | 206 | tpg = sess->se_tpg; |
6708bb27 | 207 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 AG |
208 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
209 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 210 | sess->se_node_acl->initiatorname); |
c66ac9db | 211 | |
d29a5b6a CH |
212 | out_unlock: |
213 | spin_unlock(&dev->dev_reservation_lock); | |
214 | out: | |
de103c93 CH |
215 | target_complete_cmd(cmd, GOOD); |
216 | return 0; | |
c66ac9db NB |
217 | } |
218 | ||
de103c93 CH |
219 | sense_reason_t |
220 | target_scsi2_reservation_reserve(struct se_cmd *cmd) | |
c66ac9db NB |
221 | { |
222 | struct se_device *dev = cmd->se_dev; | |
223 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 224 | struct se_portal_group *tpg; |
de103c93 CH |
225 | sense_reason_t ret = 0; |
226 | int rc; | |
c66ac9db | 227 | |
a1d8b49a AG |
228 | if ((cmd->t_task_cdb[1] & 0x01) && |
229 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 230 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 231 | " ILLEGAL_REQUEST\n"); |
de103c93 | 232 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
c66ac9db NB |
233 | } |
234 | /* | |
235 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
236 | * ops | |
237 | */ | |
609234e3 | 238 | if (!sess || !sess->se_tpg) |
d29a5b6a | 239 | goto out; |
087a03b3 NB |
240 | rc = target_check_scsi2_reservation_conflict(cmd); |
241 | if (rc == 1) | |
d29a5b6a | 242 | goto out; |
c66ac9db | 243 | |
de103c93 CH |
244 | if (rc < 0) |
245 | return TCM_RESERVATION_CONFLICT; | |
246 | ||
609234e3 | 247 | tpg = sess->se_tpg; |
c66ac9db NB |
248 | spin_lock(&dev->dev_reservation_lock); |
249 | if (dev->dev_reserved_node_acl && | |
250 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 251 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 252 | tpg->se_tpg_tfo->get_fabric_name()); |
6708bb27 | 253 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 254 | cmd->se_lun->unpacked_lun, |
c66ac9db | 255 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 256 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 257 | " from %s \n", cmd->se_lun->unpacked_lun, |
c66ac9db NB |
258 | cmd->se_deve->mapped_lun, |
259 | sess->se_node_acl->initiatorname); | |
de103c93 | 260 | ret = TCM_RESERVATION_CONFLICT; |
d29a5b6a | 261 | goto out_unlock; |
c66ac9db NB |
262 | } |
263 | ||
264 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
0fd97ccf | 265 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; |
c66ac9db NB |
266 | if (sess->sess_bin_isid != 0) { |
267 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
0fd97ccf | 268 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 269 | } |
6708bb27 | 270 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 AG |
271 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
272 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, | |
c66ac9db | 273 | sess->se_node_acl->initiatorname); |
c66ac9db | 274 | |
d29a5b6a CH |
275 | out_unlock: |
276 | spin_unlock(&dev->dev_reservation_lock); | |
277 | out: | |
6bb35e00 CH |
278 | if (!ret) |
279 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 280 | return ret; |
c66ac9db NB |
281 | } |
282 | ||
c66ac9db NB |
283 | |
284 | /* | |
285 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
286 | * | |
287 | * This function is called by those initiator ports who are *NOT* | |
288 | * the active PR reservation holder when a reservation is present. | |
289 | */ | |
290 | static int core_scsi3_pr_seq_non_holder( | |
291 | struct se_cmd *cmd, | |
c66ac9db NB |
292 | u32 pr_reg_type) |
293 | { | |
d977f437 | 294 | unsigned char *cdb = cmd->t_task_cdb; |
c66ac9db | 295 | struct se_dev_entry *se_deve; |
e3d6f909 | 296 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
297 | int other_cdb = 0, ignore_reg; |
298 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
299 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
300 | int we = 0; /* Write Exclusive */ | |
301 | int legacy = 0; /* Act like a legacy device and return | |
302 | * RESERVATION CONFLICT on some CDBs */ | |
c66ac9db | 303 | |
f2083241 | 304 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
305 | /* |
306 | * Determine if the registration should be ignored due to | |
d977f437 | 307 | * non-matching ISIDs in target_scsi3_pr_reservation_check(). |
c66ac9db NB |
308 | */ |
309 | ignore_reg = (pr_reg_type & 0x80000000); | |
310 | if (ignore_reg) | |
311 | pr_reg_type &= ~0x80000000; | |
312 | ||
313 | switch (pr_reg_type) { | |
314 | case PR_TYPE_WRITE_EXCLUSIVE: | |
315 | we = 1; | |
316 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
317 | /* | |
318 | * Some commands are only allowed for the persistent reservation | |
319 | * holder. | |
320 | */ | |
321 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
322 | registered_nexus = 1; | |
323 | break; | |
324 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
325 | we = 1; | |
326 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
327 | /* | |
328 | * Some commands are only allowed for registered I_T Nexuses. | |
329 | */ | |
330 | reg_only = 1; | |
331 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
332 | registered_nexus = 1; | |
333 | break; | |
334 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
335 | we = 1; | |
336 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
337 | /* | |
338 | * Each registered I_T Nexus is a reservation holder. | |
339 | */ | |
340 | all_reg = 1; | |
341 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
342 | registered_nexus = 1; | |
343 | break; | |
344 | default: | |
e3d6f909 | 345 | return -EINVAL; |
c66ac9db NB |
346 | } |
347 | /* | |
348 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
349 | */ | |
350 | switch (cdb[0]) { | |
351 | case SECURITY_PROTOCOL_IN: | |
352 | if (registered_nexus) | |
353 | return 0; | |
354 | ret = (we) ? 0 : 1; | |
355 | break; | |
356 | case MODE_SENSE: | |
357 | case MODE_SENSE_10: | |
358 | case READ_ATTRIBUTE: | |
359 | case READ_BUFFER: | |
360 | case RECEIVE_DIAGNOSTIC: | |
361 | if (legacy) { | |
362 | ret = 1; | |
363 | break; | |
364 | } | |
365 | if (registered_nexus) { | |
366 | ret = 0; | |
367 | break; | |
368 | } | |
369 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
370 | break; | |
371 | case PERSISTENT_RESERVE_OUT: | |
372 | /* | |
373 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
374 | * are allowed in the presence of various reservations. | |
375 | * See spc4r17, table 46 | |
376 | */ | |
377 | switch (cdb[1] & 0x1f) { | |
378 | case PRO_CLEAR: | |
379 | case PRO_PREEMPT: | |
380 | case PRO_PREEMPT_AND_ABORT: | |
381 | ret = (registered_nexus) ? 0 : 1; | |
382 | break; | |
383 | case PRO_REGISTER: | |
384 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
385 | ret = 0; | |
386 | break; | |
387 | case PRO_REGISTER_AND_MOVE: | |
388 | case PRO_RESERVE: | |
389 | ret = 1; | |
390 | break; | |
391 | case PRO_RELEASE: | |
392 | ret = (registered_nexus) ? 0 : 1; | |
393 | break; | |
394 | default: | |
6708bb27 | 395 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 396 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 397 | return -EINVAL; |
c66ac9db NB |
398 | } |
399 | break; | |
400 | case RELEASE: | |
401 | case RELEASE_10: | |
eacac00c | 402 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
403 | ret = 0; |
404 | break; | |
405 | case RESERVE: | |
406 | case RESERVE_10: | |
eacac00c | 407 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
408 | ret = 0; |
409 | break; | |
410 | case TEST_UNIT_READY: | |
411 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
412 | break; | |
413 | case MAINTENANCE_IN: | |
414 | switch (cdb[1] & 0x1f) { | |
415 | case MI_MANAGEMENT_PROTOCOL_IN: | |
416 | if (registered_nexus) { | |
417 | ret = 0; | |
418 | break; | |
419 | } | |
420 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
421 | break; | |
422 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
423 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
424 | if (legacy) { | |
425 | ret = 1; | |
426 | break; | |
427 | } | |
428 | if (registered_nexus) { | |
429 | ret = 0; | |
430 | break; | |
431 | } | |
432 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
433 | break; | |
434 | case MI_REPORT_ALIASES: | |
435 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
436 | case MI_REPORT_PRIORITY: | |
437 | case MI_REPORT_TARGET_PGS: | |
438 | case MI_REPORT_TIMESTAMP: | |
439 | ret = 0; /* Allowed */ | |
440 | break; | |
441 | default: | |
6708bb27 | 442 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 443 | (cdb[1] & 0x1f)); |
e3d6f909 | 444 | return -EINVAL; |
c66ac9db NB |
445 | } |
446 | break; | |
447 | case ACCESS_CONTROL_IN: | |
448 | case ACCESS_CONTROL_OUT: | |
449 | case INQUIRY: | |
450 | case LOG_SENSE: | |
451 | case READ_MEDIA_SERIAL_NUMBER: | |
452 | case REPORT_LUNS: | |
453 | case REQUEST_SENSE: | |
6816966a | 454 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
455 | ret = 0; /*/ Allowed CDBs */ |
456 | break; | |
457 | default: | |
458 | other_cdb = 1; | |
459 | break; | |
460 | } | |
461 | /* | |
25985edc | 462 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
463 | * statement. |
464 | */ | |
6708bb27 | 465 | if (!ret && !other_cdb) { |
6708bb27 | 466 | pr_debug("Allowing explict CDB: 0x%02x for %s" |
c66ac9db NB |
467 | " reservation holder\n", cdb[0], |
468 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 469 | |
c66ac9db NB |
470 | return ret; |
471 | } | |
472 | /* | |
473 | * Check if write exclusive initiator ports *NOT* holding the | |
474 | * WRITE_EXCLUSIVE_* reservation. | |
475 | */ | |
ee1b1b9c | 476 | if (we && !registered_nexus) { |
c66ac9db NB |
477 | if (cmd->data_direction == DMA_TO_DEVICE) { |
478 | /* | |
479 | * Conflict for write exclusive | |
480 | */ | |
6708bb27 | 481 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
482 | " %s CDB: 0x%02x to %s reservation\n", |
483 | transport_dump_cmd_direction(cmd), | |
484 | se_sess->se_node_acl->initiatorname, cdb[0], | |
485 | core_scsi3_pr_dump_type(pr_reg_type)); | |
486 | return 1; | |
487 | } else { | |
488 | /* | |
489 | * Allow non WRITE CDBs for all Write Exclusive | |
490 | * PR TYPEs to pass for registered and | |
491 | * non-registered_nexuxes NOT holding the reservation. | |
492 | * | |
493 | * We only make noise for the unregisterd nexuses, | |
494 | * as we expect registered non-reservation holding | |
495 | * nexuses to issue CDBs. | |
496 | */ | |
8b1e1244 | 497 | |
6708bb27 AG |
498 | if (!registered_nexus) { |
499 | pr_debug("Allowing implict CDB: 0x%02x" | |
c66ac9db NB |
500 | " for %s reservation on unregistered" |
501 | " nexus\n", cdb[0], | |
502 | core_scsi3_pr_dump_type(pr_reg_type)); | |
503 | } | |
8b1e1244 | 504 | |
c66ac9db NB |
505 | return 0; |
506 | } | |
507 | } else if ((reg_only) || (all_reg)) { | |
508 | if (registered_nexus) { | |
509 | /* | |
510 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
511 | * allow commands from registered nexuses. | |
512 | */ | |
8b1e1244 | 513 | |
6708bb27 | 514 | pr_debug("Allowing implict CDB: 0x%02x for %s" |
c66ac9db NB |
515 | " reservation\n", cdb[0], |
516 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 517 | |
c66ac9db NB |
518 | return 0; |
519 | } | |
520 | } | |
6708bb27 | 521 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
522 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
523 | (registered_nexus) ? "" : "un", | |
524 | se_sess->se_node_acl->initiatorname, cdb[0], | |
525 | core_scsi3_pr_dump_type(pr_reg_type)); | |
526 | ||
527 | return 1; /* Conflict by default */ | |
528 | } | |
529 | ||
de103c93 CH |
530 | static sense_reason_t |
531 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) | |
d977f437 CH |
532 | { |
533 | struct se_device *dev = cmd->se_dev; | |
534 | struct se_session *sess = cmd->se_sess; | |
535 | u32 pr_reg_type; | |
536 | ||
537 | if (!dev->dev_pr_res_holder) | |
538 | return 0; | |
539 | ||
540 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
541 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
542 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) | |
543 | goto check_nonholder; | |
544 | ||
545 | if (dev->dev_pr_res_holder->isid_present_at_reg) { | |
546 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != | |
547 | sess->sess_bin_isid) { | |
548 | pr_reg_type |= 0x80000000; | |
549 | goto check_nonholder; | |
550 | } | |
551 | } | |
552 | ||
553 | return 0; | |
554 | ||
555 | check_nonholder: | |
556 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) | |
de103c93 | 557 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
558 | return 0; |
559 | } | |
560 | ||
c66ac9db NB |
561 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
562 | { | |
c66ac9db | 563 | u32 prg; |
0fd97ccf | 564 | |
c66ac9db NB |
565 | /* |
566 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
567 | * counter mainted by the device server. | |
568 | * | |
569 | * Note that this is done regardless of Active Persist across | |
570 | * Target PowerLoss (APTPL) | |
571 | * | |
572 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
573 | */ | |
574 | spin_lock(&dev->dev_reservation_lock); | |
0fd97ccf | 575 | prg = dev->t10_pr.pr_generation++; |
c66ac9db NB |
576 | spin_unlock(&dev->dev_reservation_lock); |
577 | ||
578 | return prg; | |
579 | } | |
580 | ||
c66ac9db NB |
581 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
582 | struct se_device *dev, | |
583 | struct se_node_acl *nacl, | |
584 | struct se_dev_entry *deve, | |
585 | unsigned char *isid, | |
586 | u64 sa_res_key, | |
587 | int all_tg_pt, | |
588 | int aptpl) | |
589 | { | |
c66ac9db NB |
590 | struct t10_pr_registration *pr_reg; |
591 | ||
592 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
593 | if (!pr_reg) { |
594 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
595 | return NULL; |
596 | } | |
597 | ||
0fd97ccf | 598 | pr_reg->pr_aptpl_buf = kzalloc(dev->t10_pr.pr_aptpl_buf_len, |
c66ac9db | 599 | GFP_ATOMIC); |
6708bb27 AG |
600 | if (!pr_reg->pr_aptpl_buf) { |
601 | pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n"); | |
c66ac9db NB |
602 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
603 | return NULL; | |
604 | } | |
605 | ||
606 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
607 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
608 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
609 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
610 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
611 | atomic_set(&pr_reg->pr_res_holders, 0); | |
612 | pr_reg->pr_reg_nacl = nacl; | |
613 | pr_reg->pr_reg_deve = deve; | |
614 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
615 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
616 | pr_reg->pr_res_key = sa_res_key; | |
617 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
618 | pr_reg->pr_reg_aptpl = aptpl; | |
619 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
620 | /* | |
621 | * If an ISID value for this SCSI Initiator Port exists, | |
622 | * save it to the registration now. | |
623 | */ | |
624 | if (isid != NULL) { | |
625 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
626 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
627 | pr_reg->isid_present_at_reg = 1; | |
628 | } | |
629 | ||
630 | return pr_reg; | |
631 | } | |
632 | ||
633 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
634 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
635 | ||
636 | /* | |
637 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
638 | * modes. | |
639 | */ | |
640 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
641 | struct se_device *dev, | |
642 | struct se_node_acl *nacl, | |
643 | struct se_dev_entry *deve, | |
644 | unsigned char *isid, | |
645 | u64 sa_res_key, | |
646 | int all_tg_pt, | |
647 | int aptpl) | |
648 | { | |
649 | struct se_dev_entry *deve_tmp; | |
650 | struct se_node_acl *nacl_tmp; | |
651 | struct se_port *port, *port_tmp; | |
652 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
653 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; | |
654 | int ret; | |
655 | /* | |
656 | * Create a registration for the I_T Nexus upon which the | |
657 | * PROUT REGISTER was received. | |
658 | */ | |
659 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
660 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 661 | if (!pr_reg) |
c66ac9db NB |
662 | return NULL; |
663 | /* | |
664 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
665 | */ | |
6708bb27 | 666 | if (!all_tg_pt) |
c66ac9db NB |
667 | return pr_reg; |
668 | /* | |
669 | * Create list of matching SCSI Initiator Port registrations | |
670 | * for ALL_TG_PT=1 | |
671 | */ | |
672 | spin_lock(&dev->se_port_lock); | |
673 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
674 | atomic_inc(&port->sep_tg_pt_ref_cnt); | |
675 | smp_mb__after_atomic_inc(); | |
676 | spin_unlock(&dev->se_port_lock); | |
677 | ||
678 | spin_lock_bh(&port->sep_alua_lock); | |
679 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
680 | alua_port_list) { | |
681 | /* | |
682 | * This pointer will be NULL for demo mode MappedLUNs | |
683 | * that have not been make explict via a ConfigFS | |
684 | * MappedLUN group for the SCSI Initiator Node ACL. | |
685 | */ | |
6708bb27 | 686 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
687 | continue; |
688 | ||
689 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
690 | /* | |
691 | * Skip the matching struct se_node_acl that is allocated | |
692 | * above.. | |
693 | */ | |
694 | if (nacl == nacl_tmp) | |
695 | continue; | |
696 | /* | |
697 | * Only perform PR registrations for target ports on | |
698 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
699 | * arrived. | |
700 | */ | |
701 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
702 | continue; | |
703 | /* | |
704 | * Look for a matching Initiator Node ACL in ASCII format | |
705 | */ | |
706 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
707 | continue; | |
708 | ||
709 | atomic_inc(&deve_tmp->pr_ref_count); | |
710 | smp_mb__after_atomic_inc(); | |
711 | spin_unlock_bh(&port->sep_alua_lock); | |
712 | /* | |
713 | * Grab a configfs group dependency that is released | |
714 | * for the exception path at label out: below, or upon | |
715 | * completion of adding ALL_TG_PT=1 registrations in | |
716 | * __core_scsi3_add_registration() | |
717 | */ | |
718 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
719 | if (ret < 0) { | |
6708bb27 | 720 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db NB |
721 | "_item() failed\n"); |
722 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
723 | smp_mb__after_atomic_dec(); | |
724 | atomic_dec(&deve_tmp->pr_ref_count); | |
725 | smp_mb__after_atomic_dec(); | |
726 | goto out; | |
727 | } | |
728 | /* | |
729 | * Located a matching SCSI Initiator Port on a different | |
730 | * port, allocate the pr_reg_atp and attach it to the | |
731 | * pr_reg->pr_reg_atp_list that will be processed once | |
732 | * the original *pr_reg is processed in | |
733 | * __core_scsi3_add_registration() | |
734 | */ | |
735 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
736 | nacl_tmp, deve_tmp, NULL, | |
737 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 738 | if (!pr_reg_atp) { |
c66ac9db NB |
739 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
740 | smp_mb__after_atomic_dec(); | |
741 | atomic_dec(&deve_tmp->pr_ref_count); | |
742 | smp_mb__after_atomic_dec(); | |
743 | core_scsi3_lunacl_undepend_item(deve_tmp); | |
744 | goto out; | |
745 | } | |
746 | ||
747 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
748 | &pr_reg->pr_reg_atp_list); | |
749 | spin_lock_bh(&port->sep_alua_lock); | |
750 | } | |
751 | spin_unlock_bh(&port->sep_alua_lock); | |
752 | ||
753 | spin_lock(&dev->se_port_lock); | |
754 | atomic_dec(&port->sep_tg_pt_ref_cnt); | |
755 | smp_mb__after_atomic_dec(); | |
756 | } | |
757 | spin_unlock(&dev->se_port_lock); | |
758 | ||
759 | return pr_reg; | |
760 | out: | |
761 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
762 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
763 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
764 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
765 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
766 | } | |
767 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
768 | return NULL; | |
769 | } | |
770 | ||
771 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 772 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
773 | u64 sa_res_key, |
774 | unsigned char *i_port, | |
775 | unsigned char *isid, | |
776 | u32 mapped_lun, | |
777 | unsigned char *t_port, | |
778 | u16 tpgt, | |
779 | u32 target_lun, | |
780 | int res_holder, | |
781 | int all_tg_pt, | |
782 | u8 type) | |
783 | { | |
784 | struct t10_pr_registration *pr_reg; | |
785 | ||
6708bb27 AG |
786 | if (!i_port || !t_port || !sa_res_key) { |
787 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 788 | return -EINVAL; |
c66ac9db NB |
789 | } |
790 | ||
791 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
792 | if (!pr_reg) { |
793 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 794 | return -ENOMEM; |
c66ac9db NB |
795 | } |
796 | pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); | |
797 | ||
798 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
799 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
800 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
801 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
802 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
803 | atomic_set(&pr_reg->pr_res_holders, 0); | |
804 | pr_reg->pr_reg_nacl = NULL; | |
805 | pr_reg->pr_reg_deve = NULL; | |
806 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
807 | pr_reg->pr_aptpl_target_lun = target_lun; | |
808 | pr_reg->pr_res_key = sa_res_key; | |
809 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
810 | pr_reg->pr_reg_aptpl = 1; | |
811 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
812 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
813 | pr_reg->pr_res_type = type; | |
814 | /* | |
815 | * If an ISID value had been saved in APTPL metadata for this | |
816 | * SCSI Initiator Port, restore it now. | |
817 | */ | |
818 | if (isid != NULL) { | |
819 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
820 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
821 | pr_reg->isid_present_at_reg = 1; | |
822 | } | |
823 | /* | |
824 | * Copy the i_port and t_port information from caller. | |
825 | */ | |
826 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
827 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
828 | pr_reg->pr_reg_tpgt = tpgt; | |
829 | /* | |
830 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
831 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
832 | * the Initiator Node LUN ACL from the fabric module is created for | |
833 | * this registration. | |
834 | */ | |
835 | pr_reg->pr_res_holder = res_holder; | |
836 | ||
837 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 838 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
839 | " metadata\n", (res_holder) ? "+reservation" : ""); |
840 | return 0; | |
841 | } | |
842 | ||
843 | static void core_scsi3_aptpl_reserve( | |
844 | struct se_device *dev, | |
845 | struct se_portal_group *tpg, | |
846 | struct se_node_acl *node_acl, | |
847 | struct t10_pr_registration *pr_reg) | |
848 | { | |
849 | char i_buf[PR_REG_ISID_ID_LEN]; | |
850 | int prf_isid; | |
851 | ||
852 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
853 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
854 | PR_REG_ISID_ID_LEN); | |
855 | ||
856 | spin_lock(&dev->dev_reservation_lock); | |
857 | dev->dev_pr_res_holder = pr_reg; | |
858 | spin_unlock(&dev->dev_reservation_lock); | |
859 | ||
6708bb27 | 860 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 861 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 862 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
863 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
864 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 865 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 866 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
c66ac9db NB |
867 | (prf_isid) ? &i_buf[0] : ""); |
868 | } | |
869 | ||
870 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
871 | struct t10_pr_registration *, int, int); | |
872 | ||
873 | static int __core_scsi3_check_aptpl_registration( | |
874 | struct se_device *dev, | |
875 | struct se_portal_group *tpg, | |
876 | struct se_lun *lun, | |
877 | u32 target_lun, | |
878 | struct se_node_acl *nacl, | |
879 | struct se_dev_entry *deve) | |
880 | { | |
881 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 882 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
883 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
884 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
885 | u16 tpgt; | |
886 | ||
887 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
888 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
889 | /* | |
890 | * Copy Initiator Port information from struct se_node_acl | |
891 | */ | |
892 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
893 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
894 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
895 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
896 | /* |
897 | * Look for the matching registrations+reservation from those | |
898 | * created from APTPL metadata. Note that multiple registrations | |
899 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
900 | * TransportIDs. | |
901 | */ | |
902 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
903 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
904 | pr_reg_aptpl_list) { | |
6708bb27 | 905 | if (!strcmp(pr_reg->pr_iport, i_port) && |
c66ac9db NB |
906 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
907 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
908 | (pr_reg->pr_reg_tpgt == tpgt) && | |
909 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
910 | ||
911 | pr_reg->pr_reg_nacl = nacl; | |
912 | pr_reg->pr_reg_deve = deve; | |
913 | pr_reg->pr_reg_tg_pt_lun = lun; | |
914 | ||
915 | list_del(&pr_reg->pr_reg_aptpl_list); | |
916 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
917 | /* | |
918 | * At this point all of the pointers in *pr_reg will | |
919 | * be setup, so go ahead and add the registration. | |
920 | */ | |
921 | ||
922 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
923 | /* | |
924 | * If this registration is the reservation holder, | |
925 | * make that happen now.. | |
926 | */ | |
927 | if (pr_reg->pr_res_holder) | |
928 | core_scsi3_aptpl_reserve(dev, tpg, | |
929 | nacl, pr_reg); | |
930 | /* | |
931 | * Reenable pr_aptpl_active to accept new metadata | |
932 | * updates once the SCSI device is active again.. | |
933 | */ | |
934 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
935 | pr_tmpl->pr_aptpl_active = 1; | |
936 | } | |
937 | } | |
938 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | int core_scsi3_check_aptpl_registration( | |
944 | struct se_device *dev, | |
945 | struct se_portal_group *tpg, | |
946 | struct se_lun *lun, | |
947 | struct se_lun_acl *lun_acl) | |
948 | { | |
c66ac9db | 949 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; |
f2083241 | 950 | struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; |
c66ac9db | 951 | |
d977f437 | 952 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
c66ac9db NB |
953 | return 0; |
954 | ||
955 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
956 | lun->unpacked_lun, nacl, deve); | |
957 | } | |
958 | ||
959 | static void __core_scsi3_dump_registration( | |
960 | struct target_core_fabric_ops *tfo, | |
961 | struct se_device *dev, | |
962 | struct se_node_acl *nacl, | |
963 | struct t10_pr_registration *pr_reg, | |
964 | int register_type) | |
965 | { | |
966 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
967 | char i_buf[PR_REG_ISID_ID_LEN]; | |
968 | int prf_isid; | |
969 | ||
970 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
971 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
972 | PR_REG_ISID_ID_LEN); | |
973 | ||
6708bb27 | 974 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
c66ac9db NB |
975 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? |
976 | "_AND_MOVE" : (register_type == 1) ? | |
977 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, | |
978 | (prf_isid) ? i_buf : ""); | |
6708bb27 | 979 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
980 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
981 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 982 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
983 | " Port(s)\n", tfo->get_fabric_name(), |
984 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 985 | dev->transport->name); |
6708bb27 | 986 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
987 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
988 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
989 | pr_reg->pr_reg_aptpl); | |
990 | } | |
991 | ||
992 | /* | |
993 | * this function can be called with struct se_device->dev_reservation_lock | |
994 | * when register_move = 1 | |
995 | */ | |
996 | static void __core_scsi3_add_registration( | |
997 | struct se_device *dev, | |
998 | struct se_node_acl *nacl, | |
999 | struct t10_pr_registration *pr_reg, | |
1000 | int register_type, | |
1001 | int register_move) | |
1002 | { | |
c66ac9db NB |
1003 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
1004 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
0fd97ccf | 1005 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1006 | |
1007 | /* | |
1008 | * Increment PRgeneration counter for struct se_device upon a successful | |
1009 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1010 | * | |
1011 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1012 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1013 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1014 | * for the REGISTER. | |
1015 | */ | |
1016 | pr_reg->pr_res_generation = (register_move) ? | |
0fd97ccf | 1017 | dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1018 | core_scsi3_pr_generation(dev); |
1019 | ||
1020 | spin_lock(&pr_tmpl->registration_lock); | |
1021 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1022 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1023 | ||
1024 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1025 | spin_unlock(&pr_tmpl->registration_lock); | |
1026 | /* | |
1027 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1028 | */ | |
6708bb27 | 1029 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1030 | return; |
1031 | /* | |
1032 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1033 | * allocated in __core_scsi3_alloc_registration() | |
1034 | */ | |
1035 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1036 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1037 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1038 | ||
1039 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1040 | ||
1041 | spin_lock(&pr_tmpl->registration_lock); | |
1042 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1043 | &pr_tmpl->registration_list); | |
1044 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1045 | ||
1046 | __core_scsi3_dump_registration(tfo, dev, | |
1047 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1048 | register_type); | |
1049 | spin_unlock(&pr_tmpl->registration_lock); | |
1050 | /* | |
1051 | * Drop configfs group dependency reference from | |
1052 | * __core_scsi3_alloc_registration() | |
1053 | */ | |
1054 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | static int core_scsi3_alloc_registration( | |
1059 | struct se_device *dev, | |
1060 | struct se_node_acl *nacl, | |
1061 | struct se_dev_entry *deve, | |
1062 | unsigned char *isid, | |
1063 | u64 sa_res_key, | |
1064 | int all_tg_pt, | |
1065 | int aptpl, | |
1066 | int register_type, | |
1067 | int register_move) | |
1068 | { | |
1069 | struct t10_pr_registration *pr_reg; | |
1070 | ||
1071 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1072 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1073 | if (!pr_reg) |
e3d6f909 | 1074 | return -EPERM; |
c66ac9db NB |
1075 | |
1076 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1077 | register_type, register_move); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1082 | struct se_device *dev, | |
1083 | struct se_node_acl *nacl, | |
1084 | unsigned char *isid) | |
1085 | { | |
0fd97ccf | 1086 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1087 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1088 | struct se_portal_group *tpg; | |
1089 | ||
1090 | spin_lock(&pr_tmpl->registration_lock); | |
1091 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1092 | &pr_tmpl->registration_list, pr_reg_list) { | |
1093 | /* | |
1094 | * First look for a matching struct se_node_acl | |
1095 | */ | |
1096 | if (pr_reg->pr_reg_nacl != nacl) | |
1097 | continue; | |
1098 | ||
1099 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1100 | /* | |
1101 | * If this registration does NOT contain a fabric provided | |
1102 | * ISID, then we have found a match. | |
1103 | */ | |
6708bb27 | 1104 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1105 | /* |
1106 | * Determine if this SCSI device server requires that | |
1107 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1108 | * for fabric modules (iSCSI) requiring them. | |
1109 | */ | |
e3d6f909 | 1110 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
0fd97ccf | 1111 | if (dev->dev_attrib.enforce_pr_isids) |
c66ac9db NB |
1112 | continue; |
1113 | } | |
1114 | atomic_inc(&pr_reg->pr_res_holders); | |
1115 | smp_mb__after_atomic_inc(); | |
1116 | spin_unlock(&pr_tmpl->registration_lock); | |
1117 | return pr_reg; | |
1118 | } | |
1119 | /* | |
1120 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1121 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1122 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1123 | */ | |
6708bb27 | 1124 | if (!isid) |
c66ac9db NB |
1125 | continue; |
1126 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1127 | continue; | |
1128 | ||
1129 | atomic_inc(&pr_reg->pr_res_holders); | |
1130 | smp_mb__after_atomic_inc(); | |
1131 | spin_unlock(&pr_tmpl->registration_lock); | |
1132 | return pr_reg; | |
1133 | } | |
1134 | spin_unlock(&pr_tmpl->registration_lock); | |
1135 | ||
1136 | return NULL; | |
1137 | } | |
1138 | ||
1139 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1140 | struct se_device *dev, | |
1141 | struct se_node_acl *nacl, | |
1142 | struct se_session *sess) | |
1143 | { | |
1144 | struct se_portal_group *tpg = nacl->se_tpg; | |
1145 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1146 | ||
e3d6f909 | 1147 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1148 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1149 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1150 | PR_REG_ISID_LEN); |
1151 | isid_ptr = &buf[0]; | |
1152 | } | |
1153 | ||
1154 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1155 | } | |
1156 | ||
1157 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1158 | { | |
1159 | atomic_dec(&pr_reg->pr_res_holders); | |
1160 | smp_mb__after_atomic_dec(); | |
1161 | } | |
1162 | ||
1163 | static int core_scsi3_check_implict_release( | |
1164 | struct se_device *dev, | |
1165 | struct t10_pr_registration *pr_reg) | |
1166 | { | |
1167 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1168 | struct t10_pr_registration *pr_res_holder; | |
1169 | int ret = 0; | |
1170 | ||
1171 | spin_lock(&dev->dev_reservation_lock); | |
1172 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1173 | if (!pr_res_holder) { |
c66ac9db NB |
1174 | spin_unlock(&dev->dev_reservation_lock); |
1175 | return ret; | |
1176 | } | |
1177 | if (pr_res_holder == pr_reg) { | |
1178 | /* | |
1179 | * Perform an implict RELEASE if the registration that | |
1180 | * is being released is holding the reservation. | |
1181 | * | |
1182 | * From spc4r17, section 5.7.11.1: | |
1183 | * | |
1184 | * e) If the I_T nexus is the persistent reservation holder | |
1185 | * and the persistent reservation is not an all registrants | |
1186 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1187 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1188 | * service action with the SERVICE ACTION RESERVATION KEY | |
1189 | * field set to zero (see 5.7.11.3). | |
1190 | */ | |
1191 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); | |
1192 | ret = 1; | |
1193 | /* | |
1194 | * For 'All Registrants' reservation types, all existing | |
1195 | * registrations are still processed as reservation holders | |
1196 | * in core_scsi3_pr_seq_non_holder() after the initial | |
1197 | * reservation holder is implictly released here. | |
1198 | */ | |
1199 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1200 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1201 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1202 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1203 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1204 | " UNREGISTER while existing reservation with matching" |
1205 | " key 0x%016Lx is present from another SCSI Initiator" | |
1206 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1207 | ret = -EPERM; |
c66ac9db NB |
1208 | } |
1209 | spin_unlock(&dev->dev_reservation_lock); | |
1210 | ||
1211 | return ret; | |
1212 | } | |
1213 | ||
1214 | /* | |
e3d6f909 | 1215 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1216 | */ |
1217 | static void __core_scsi3_free_registration( | |
1218 | struct se_device *dev, | |
1219 | struct t10_pr_registration *pr_reg, | |
1220 | struct list_head *preempt_and_abort_list, | |
1221 | int dec_holders) | |
1222 | { | |
1223 | struct target_core_fabric_ops *tfo = | |
1224 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; | |
0fd97ccf | 1225 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1226 | char i_buf[PR_REG_ISID_ID_LEN]; |
1227 | int prf_isid; | |
1228 | ||
1229 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1230 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
1231 | PR_REG_ISID_ID_LEN); | |
1232 | ||
1233 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1234 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
1235 | list_del(&pr_reg->pr_reg_list); | |
1236 | /* | |
1237 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1238 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1239 | */ | |
1240 | if (dec_holders) | |
1241 | core_scsi3_put_pr_reg(pr_reg); | |
1242 | /* | |
1243 | * Wait until all reference from any other I_T nexuses for this | |
1244 | * *pr_reg have been released. Because list_del() is called above, | |
1245 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1246 | * count back to zero, and we release *pr_reg. | |
1247 | */ | |
1248 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1249 | spin_unlock(&pr_tmpl->registration_lock); | |
6708bb27 | 1250 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1251 | tfo->get_fabric_name()); |
1252 | cpu_relax(); | |
1253 | spin_lock(&pr_tmpl->registration_lock); | |
1254 | } | |
1255 | ||
6708bb27 | 1256 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1257 | " Node: %s%s\n", tfo->get_fabric_name(), |
1258 | pr_reg->pr_reg_nacl->initiatorname, | |
1259 | (prf_isid) ? &i_buf[0] : ""); | |
6708bb27 | 1260 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1261 | " Port(s)\n", tfo->get_fabric_name(), |
1262 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1263 | dev->transport->name); |
6708bb27 | 1264 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1265 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1266 | pr_reg->pr_res_generation); | |
1267 | ||
6708bb27 | 1268 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1269 | pr_reg->pr_reg_deve = NULL; |
1270 | pr_reg->pr_reg_nacl = NULL; | |
1271 | kfree(pr_reg->pr_aptpl_buf); | |
1272 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1273 | return; | |
1274 | } | |
1275 | /* | |
1276 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1277 | * are released once the ABORT_TASK_SET has completed.. | |
1278 | */ | |
1279 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1280 | } | |
1281 | ||
1282 | void core_scsi3_free_pr_reg_from_nacl( | |
1283 | struct se_device *dev, | |
1284 | struct se_node_acl *nacl) | |
1285 | { | |
0fd97ccf | 1286 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1287 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1288 | /* | |
1289 | * If the passed se_node_acl matches the reservation holder, | |
1290 | * release the reservation. | |
1291 | */ | |
1292 | spin_lock(&dev->dev_reservation_lock); | |
1293 | pr_res_holder = dev->dev_pr_res_holder; | |
1294 | if ((pr_res_holder != NULL) && | |
1295 | (pr_res_holder->pr_reg_nacl == nacl)) | |
1296 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); | |
1297 | spin_unlock(&dev->dev_reservation_lock); | |
1298 | /* | |
1299 | * Release any registration associated with the struct se_node_acl. | |
1300 | */ | |
1301 | spin_lock(&pr_tmpl->registration_lock); | |
1302 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1303 | &pr_tmpl->registration_list, pr_reg_list) { | |
1304 | ||
1305 | if (pr_reg->pr_reg_nacl != nacl) | |
1306 | continue; | |
1307 | ||
1308 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1309 | } | |
1310 | spin_unlock(&pr_tmpl->registration_lock); | |
1311 | } | |
1312 | ||
1313 | void core_scsi3_free_all_registrations( | |
1314 | struct se_device *dev) | |
1315 | { | |
0fd97ccf | 1316 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1317 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1318 | ||
1319 | spin_lock(&dev->dev_reservation_lock); | |
1320 | pr_res_holder = dev->dev_pr_res_holder; | |
1321 | if (pr_res_holder != NULL) { | |
1322 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1323 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
1324 | pr_res_holder, 0); | |
1325 | } | |
1326 | spin_unlock(&dev->dev_reservation_lock); | |
1327 | ||
1328 | spin_lock(&pr_tmpl->registration_lock); | |
1329 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1330 | &pr_tmpl->registration_list, pr_reg_list) { | |
1331 | ||
1332 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1333 | } | |
1334 | spin_unlock(&pr_tmpl->registration_lock); | |
1335 | ||
1336 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1337 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1338 | pr_reg_aptpl_list) { | |
1339 | list_del(&pr_reg->pr_reg_aptpl_list); | |
1340 | kfree(pr_reg->pr_aptpl_buf); | |
1341 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
1342 | } | |
1343 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1344 | } | |
1345 | ||
1346 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1347 | { | |
e3d6f909 | 1348 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1349 | &tpg->tpg_group.cg_item); |
1350 | } | |
1351 | ||
1352 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1353 | { | |
e3d6f909 | 1354 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1355 | &tpg->tpg_group.cg_item); |
1356 | ||
1357 | atomic_dec(&tpg->tpg_pr_ref_count); | |
1358 | smp_mb__after_atomic_dec(); | |
1359 | } | |
1360 | ||
1361 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1362 | { | |
1363 | struct se_portal_group *tpg = nacl->se_tpg; | |
1364 | ||
1365 | if (nacl->dynamic_node_acl) | |
1366 | return 0; | |
1367 | ||
e3d6f909 | 1368 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1369 | &nacl->acl_group.cg_item); |
1370 | } | |
1371 | ||
1372 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1373 | { | |
1374 | struct se_portal_group *tpg = nacl->se_tpg; | |
1375 | ||
1376 | if (nacl->dynamic_node_acl) { | |
1377 | atomic_dec(&nacl->acl_pr_ref_count); | |
1378 | smp_mb__after_atomic_dec(); | |
1379 | return; | |
1380 | } | |
1381 | ||
e3d6f909 | 1382 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1383 | &nacl->acl_group.cg_item); |
1384 | ||
1385 | atomic_dec(&nacl->acl_pr_ref_count); | |
1386 | smp_mb__after_atomic_dec(); | |
1387 | } | |
1388 | ||
1389 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1390 | { | |
1391 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1392 | struct se_node_acl *nacl; | |
1393 | struct se_portal_group *tpg; | |
1394 | /* | |
1395 | * For nacl->dynamic_node_acl=1 | |
1396 | */ | |
6708bb27 | 1397 | if (!lun_acl) |
c66ac9db NB |
1398 | return 0; |
1399 | ||
1400 | nacl = lun_acl->se_lun_nacl; | |
1401 | tpg = nacl->se_tpg; | |
1402 | ||
e3d6f909 | 1403 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1404 | &lun_acl->se_lun_group.cg_item); |
1405 | } | |
1406 | ||
1407 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1408 | { | |
1409 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1410 | struct se_node_acl *nacl; | |
1411 | struct se_portal_group *tpg; | |
1412 | /* | |
1413 | * For nacl->dynamic_node_acl=1 | |
1414 | */ | |
6708bb27 | 1415 | if (!lun_acl) { |
c66ac9db NB |
1416 | atomic_dec(&se_deve->pr_ref_count); |
1417 | smp_mb__after_atomic_dec(); | |
1418 | return; | |
1419 | } | |
1420 | nacl = lun_acl->se_lun_nacl; | |
1421 | tpg = nacl->se_tpg; | |
1422 | ||
e3d6f909 | 1423 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
c66ac9db NB |
1424 | &lun_acl->se_lun_group.cg_item); |
1425 | ||
1426 | atomic_dec(&se_deve->pr_ref_count); | |
1427 | smp_mb__after_atomic_dec(); | |
1428 | } | |
1429 | ||
de103c93 CH |
1430 | static sense_reason_t |
1431 | core_scsi3_decode_spec_i_port( | |
c66ac9db NB |
1432 | struct se_cmd *cmd, |
1433 | struct se_portal_group *tpg, | |
1434 | unsigned char *l_isid, | |
1435 | u64 sa_res_key, | |
1436 | int all_tg_pt, | |
1437 | int aptpl) | |
1438 | { | |
5951146d | 1439 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1440 | struct se_port *tmp_port; |
1441 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1442 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
1443 | struct se_node_acl *dest_node_acl = NULL; |
1444 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1445 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1446 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1447 | LIST_HEAD(tid_dest_list); |
c66ac9db NB |
1448 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
1449 | struct target_core_fabric_ops *tmp_tf_ops; | |
05d1c7c0 | 1450 | unsigned char *buf; |
c66ac9db NB |
1451 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; |
1452 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
de103c93 | 1453 | sense_reason_t ret; |
c66ac9db | 1454 | u32 tpdl, tid_len = 0; |
de103c93 | 1455 | int dest_local_nexus, prf_isid; |
c66ac9db NB |
1456 | u32 dest_rtpi = 0; |
1457 | ||
1458 | memset(dest_iport, 0, 64); | |
c66ac9db | 1459 | |
f2083241 | 1460 | local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
1461 | /* |
1462 | * Allocate a struct pr_transport_id_holder and setup the | |
1463 | * local_node_acl and local_se_deve pointers and add to | |
1464 | * struct list_head tid_dest_list for add registration | |
1465 | * processing in the loop of tid_dest_list below. | |
1466 | */ | |
1467 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1468 | if (!tidh_new) { |
1469 | pr_err("Unable to allocate tidh_new\n"); | |
de103c93 | 1470 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1471 | } |
1472 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1473 | tidh_new->dest_tpg = tpg; | |
1474 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1475 | tidh_new->dest_se_deve = local_se_deve; | |
1476 | ||
5951146d | 1477 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1478 | se_sess->se_node_acl, local_se_deve, l_isid, |
1479 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1480 | if (!local_pr_reg) { |
c66ac9db | 1481 | kfree(tidh_new); |
de103c93 | 1482 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1483 | } |
1484 | tidh_new->dest_pr_reg = local_pr_reg; | |
1485 | /* | |
1486 | * The local I_T nexus does not hold any configfs dependances, | |
1487 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1488 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1489 | */ | |
1490 | tidh_new->dest_local_nexus = 1; | |
1491 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
05d1c7c0 | 1492 | |
0d7f1299 PB |
1493 | if (cmd->data_length < 28) { |
1494 | pr_warn("SPC-PR: Received PR OUT parameter list" | |
1495 | " length too small: %u\n", cmd->data_length); | |
de103c93 | 1496 | ret = TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
1497 | goto out; |
1498 | } | |
1499 | ||
4949314c | 1500 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1501 | if (!buf) { |
1502 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1503 | goto out; | |
1504 | } | |
1505 | ||
c66ac9db NB |
1506 | /* |
1507 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1508 | * first extract TransportID Parameter Data Length, and make sure | |
1509 | * the value matches up to the SCSI expected data transfer length. | |
1510 | */ | |
1511 | tpdl = (buf[24] & 0xff) << 24; | |
1512 | tpdl |= (buf[25] & 0xff) << 16; | |
1513 | tpdl |= (buf[26] & 0xff) << 8; | |
1514 | tpdl |= buf[27] & 0xff; | |
1515 | ||
1516 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1517 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1518 | " does not equal CDB data_length: %u\n", tpdl, |
1519 | cmd->data_length); | |
de103c93 CH |
1520 | ret = TCM_INVALID_PARAMETER_LIST; |
1521 | goto out_unmap; | |
c66ac9db NB |
1522 | } |
1523 | /* | |
1524 | * Start processing the received transport IDs using the | |
1525 | * receiving I_T Nexus portal's fabric dependent methods to | |
1526 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1527 | */ | |
1528 | ptr = &buf[28]; | |
1529 | ||
1530 | while (tpdl > 0) { | |
1531 | proto_ident = (ptr[0] & 0x0f); | |
1532 | dest_tpg = NULL; | |
1533 | ||
1534 | spin_lock(&dev->se_port_lock); | |
1535 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1536 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1537 | if (!tmp_tpg) |
c66ac9db | 1538 | continue; |
e3d6f909 | 1539 | tmp_tf_ops = tmp_tpg->se_tpg_tfo; |
6708bb27 | 1540 | if (!tmp_tf_ops) |
c66ac9db | 1541 | continue; |
6708bb27 AG |
1542 | if (!tmp_tf_ops->get_fabric_proto_ident || |
1543 | !tmp_tf_ops->tpg_parse_pr_out_transport_id) | |
c66ac9db NB |
1544 | continue; |
1545 | /* | |
1546 | * Look for the matching proto_ident provided by | |
1547 | * the received TransportID | |
1548 | */ | |
1549 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); | |
1550 | if (tmp_proto_ident != proto_ident) | |
1551 | continue; | |
1552 | dest_rtpi = tmp_port->sep_rtpi; | |
1553 | ||
1554 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( | |
1555 | tmp_tpg, (const char *)ptr, &tid_len, | |
1556 | &iport_ptr); | |
6708bb27 | 1557 | if (!i_str) |
c66ac9db NB |
1558 | continue; |
1559 | ||
1560 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); | |
1561 | smp_mb__after_atomic_inc(); | |
1562 | spin_unlock(&dev->se_port_lock); | |
1563 | ||
de103c93 | 1564 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
6708bb27 | 1565 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db NB |
1566 | " for tmp_tpg\n"); |
1567 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); | |
1568 | smp_mb__after_atomic_dec(); | |
de103c93 CH |
1569 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1570 | goto out_unmap; | |
c66ac9db NB |
1571 | } |
1572 | /* | |
35d1efe8 | 1573 | * Locate the destination initiator ACL to be registered |
c66ac9db NB |
1574 | * from the decoded fabric module specific TransportID |
1575 | * at *i_str. | |
1576 | */ | |
28638887 | 1577 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db NB |
1578 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1579 | tmp_tpg, i_str); | |
1580 | if (dest_node_acl) { | |
1581 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
1582 | smp_mb__after_atomic_inc(); | |
1583 | } | |
28638887 | 1584 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db | 1585 | |
6708bb27 | 1586 | if (!dest_node_acl) { |
c66ac9db NB |
1587 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1588 | spin_lock(&dev->se_port_lock); | |
1589 | continue; | |
1590 | } | |
1591 | ||
de103c93 | 1592 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
6708bb27 | 1593 | pr_err("configfs_depend_item() failed" |
c66ac9db NB |
1594 | " for dest_node_acl->acl_group\n"); |
1595 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
1596 | smp_mb__after_atomic_dec(); | |
1597 | core_scsi3_tpg_undepend_item(tmp_tpg); | |
de103c93 CH |
1598 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1599 | goto out_unmap; | |
c66ac9db NB |
1600 | } |
1601 | ||
1602 | dest_tpg = tmp_tpg; | |
6708bb27 | 1603 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1604 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1605 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1606 | dest_node_acl->initiatorname, dest_rtpi); |
1607 | ||
1608 | spin_lock(&dev->se_port_lock); | |
1609 | break; | |
1610 | } | |
1611 | spin_unlock(&dev->se_port_lock); | |
1612 | ||
6708bb27 AG |
1613 | if (!dest_tpg) { |
1614 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1615 | " dest_tpg\n"); |
de103c93 CH |
1616 | ret = TCM_INVALID_PARAMETER_LIST; |
1617 | goto out_unmap; | |
c66ac9db | 1618 | } |
8b1e1244 | 1619 | |
6708bb27 | 1620 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1621 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1622 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db | 1623 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1624 | |
c66ac9db | 1625 | if (tid_len > tpdl) { |
6708bb27 | 1626 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1627 | " %u for Transport ID: %s\n", tid_len, ptr); |
1628 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1629 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1630 | ret = TCM_INVALID_PARAMETER_LIST; |
1631 | goto out_unmap; | |
c66ac9db NB |
1632 | } |
1633 | /* | |
1634 | * Locate the desintation struct se_dev_entry pointer for matching | |
1635 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1636 | * Target Port. | |
1637 | */ | |
1638 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1639 | dest_rtpi); | |
6708bb27 AG |
1640 | if (!dest_se_deve) { |
1641 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1642 | " from destination RTPI: %hu\n", |
e3d6f909 | 1643 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1644 | dest_rtpi); |
1645 | ||
1646 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1647 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1648 | ret = TCM_INVALID_PARAMETER_LIST; |
1649 | goto out_unmap; | |
c66ac9db NB |
1650 | } |
1651 | ||
de103c93 | 1652 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 1653 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db NB |
1654 | " failed\n"); |
1655 | atomic_dec(&dest_se_deve->pr_ref_count); | |
1656 | smp_mb__after_atomic_dec(); | |
1657 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1658 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1659 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1660 | goto out_unmap; | |
c66ac9db | 1661 | } |
8b1e1244 | 1662 | |
6708bb27 | 1663 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1664 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1665 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 1666 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1667 | |
c66ac9db NB |
1668 | /* |
1669 | * Skip any TransportIDs that already have a registration for | |
1670 | * this target port. | |
1671 | */ | |
1672 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1673 | iport_ptr); | |
1674 | if (pr_reg_e) { | |
1675 | core_scsi3_put_pr_reg(pr_reg_e); | |
1676 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1677 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1678 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1679 | ptr += tid_len; | |
1680 | tpdl -= tid_len; | |
1681 | tid_len = 0; | |
1682 | continue; | |
1683 | } | |
1684 | /* | |
1685 | * Allocate a struct pr_transport_id_holder and setup | |
1686 | * the dest_node_acl and dest_se_deve pointers for the | |
1687 | * loop below. | |
1688 | */ | |
1689 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1690 | GFP_KERNEL); | |
6708bb27 AG |
1691 | if (!tidh_new) { |
1692 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1693 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1694 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1695 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1696 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1697 | goto out_unmap; | |
c66ac9db NB |
1698 | } |
1699 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1700 | tidh_new->dest_tpg = dest_tpg; | |
1701 | tidh_new->dest_node_acl = dest_node_acl; | |
1702 | tidh_new->dest_se_deve = dest_se_deve; | |
1703 | ||
1704 | /* | |
1705 | * Allocate, but do NOT add the registration for the | |
1706 | * TransportID referenced SCSI Initiator port. This | |
1707 | * done because of the following from spc4r17 in section | |
1708 | * 6.14.3 wrt SPEC_I_PT: | |
1709 | * | |
1710 | * "If a registration fails for any initiator port (e.g., if th | |
1711 | * logical unit does not have enough resources available to | |
1712 | * hold the registration information), no registrations shall be | |
1713 | * made, and the command shall be terminated with | |
1714 | * CHECK CONDITION status." | |
1715 | * | |
1716 | * That means we call __core_scsi3_alloc_registration() here, | |
1717 | * and then call __core_scsi3_add_registration() in the | |
1718 | * 2nd loop which will never fail. | |
1719 | */ | |
5951146d | 1720 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1721 | dest_node_acl, dest_se_deve, iport_ptr, |
1722 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1723 | if (!dest_pr_reg) { |
c66ac9db NB |
1724 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1725 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1726 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1727 | kfree(tidh_new); | |
de103c93 CH |
1728 | ret = TCM_INVALID_PARAMETER_LIST; |
1729 | goto out_unmap; | |
c66ac9db NB |
1730 | } |
1731 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1732 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1733 | ||
1734 | ptr += tid_len; | |
1735 | tpdl -= tid_len; | |
1736 | tid_len = 0; | |
1737 | ||
1738 | } | |
05d1c7c0 | 1739 | |
4949314c | 1740 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1741 | |
c66ac9db NB |
1742 | /* |
1743 | * Go ahead and create a registrations from tid_dest_list for the | |
1744 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1745 | * and dest_se_deve. | |
1746 | * | |
1747 | * The SA Reservation Key from the PROUT is set for the | |
1748 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1749 | * means that the TransportID Initiator port will be | |
1750 | * registered on all of the target ports in the SCSI target device | |
1751 | * ALL_TG_PT=0 means the registration will only be for the | |
1752 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1753 | * was received. | |
1754 | */ | |
1755 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1756 | dest_tpg = tidh->dest_tpg; | |
1757 | dest_node_acl = tidh->dest_node_acl; | |
1758 | dest_se_deve = tidh->dest_se_deve; | |
1759 | dest_pr_reg = tidh->dest_pr_reg; | |
1760 | dest_local_nexus = tidh->dest_local_nexus; | |
1761 | ||
1762 | list_del(&tidh->dest_list); | |
1763 | kfree(tidh); | |
1764 | ||
1765 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
1766 | prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], | |
1767 | PR_REG_ISID_ID_LEN); | |
1768 | ||
5951146d | 1769 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1770 | dest_pr_reg, 0, 0); |
1771 | ||
6708bb27 | 1772 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1773 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1774 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1775 | dest_node_acl->initiatorname, (prf_isid) ? |
1776 | &i_buf[0] : "", dest_se_deve->mapped_lun); | |
1777 | ||
1778 | if (dest_local_nexus) | |
1779 | continue; | |
1780 | ||
1781 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1782 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1783 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1784 | } | |
1785 | ||
1786 | return 0; | |
de103c93 | 1787 | out_unmap: |
4949314c | 1788 | transport_kunmap_data_sg(cmd); |
de103c93 | 1789 | out: |
c66ac9db NB |
1790 | /* |
1791 | * For the failure case, release everything from tid_dest_list | |
1792 | * including *dest_pr_reg and the configfs dependances.. | |
1793 | */ | |
1794 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1795 | dest_tpg = tidh->dest_tpg; | |
1796 | dest_node_acl = tidh->dest_node_acl; | |
1797 | dest_se_deve = tidh->dest_se_deve; | |
1798 | dest_pr_reg = tidh->dest_pr_reg; | |
1799 | dest_local_nexus = tidh->dest_local_nexus; | |
1800 | ||
1801 | list_del(&tidh->dest_list); | |
1802 | kfree(tidh); | |
1803 | /* | |
1804 | * Release any extra ALL_TG_PT=1 registrations for | |
1805 | * the SPEC_I_PT=1 case. | |
1806 | */ | |
1807 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1808 | &dest_pr_reg->pr_reg_atp_list, | |
1809 | pr_reg_atp_mem_list) { | |
1810 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1811 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1812 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1813 | } | |
1814 | ||
1815 | kfree(dest_pr_reg->pr_aptpl_buf); | |
1816 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); | |
1817 | ||
1818 | if (dest_local_nexus) | |
1819 | continue; | |
1820 | ||
1821 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1822 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1823 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1824 | } | |
1825 | return ret; | |
1826 | } | |
1827 | ||
1828 | /* | |
1829 | * Called with struct se_device->dev_reservation_lock held | |
1830 | */ | |
1831 | static int __core_scsi3_update_aptpl_buf( | |
1832 | struct se_device *dev, | |
1833 | unsigned char *buf, | |
1834 | u32 pr_aptpl_buf_len, | |
1835 | int clear_aptpl_metadata) | |
1836 | { | |
1837 | struct se_lun *lun; | |
1838 | struct se_portal_group *tpg; | |
c66ac9db NB |
1839 | struct t10_pr_registration *pr_reg; |
1840 | unsigned char tmp[512], isid_buf[32]; | |
1841 | ssize_t len = 0; | |
1842 | int reg_count = 0; | |
1843 | ||
1844 | memset(buf, 0, pr_aptpl_buf_len); | |
1845 | /* | |
1846 | * Called to clear metadata once APTPL has been deactivated. | |
1847 | */ | |
1848 | if (clear_aptpl_metadata) { | |
1849 | snprintf(buf, pr_aptpl_buf_len, | |
1850 | "No Registrations or Reservations\n"); | |
1851 | return 0; | |
1852 | } | |
1853 | /* | |
1854 | * Walk the registration list.. | |
1855 | */ | |
0fd97ccf CH |
1856 | spin_lock(&dev->t10_pr.registration_lock); |
1857 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
1858 | pr_reg_list) { |
1859 | ||
1860 | tmp[0] = '\0'; | |
1861 | isid_buf[0] = '\0'; | |
1862 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1863 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1864 | /* | |
1865 | * Write out any ISID value to APTPL metadata that was included | |
1866 | * in the original registration. | |
1867 | */ | |
1868 | if (pr_reg->isid_present_at_reg) | |
1869 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1870 | pr_reg->pr_reg_isid); | |
1871 | /* | |
1872 | * Include special metadata if the pr_reg matches the | |
1873 | * reservation holder. | |
1874 | */ | |
1875 | if (dev->dev_pr_res_holder == pr_reg) { | |
1876 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1877 | "\ninitiator_fabric=%s\n" | |
1878 | "initiator_node=%s\n%s" | |
1879 | "sa_res_key=%llu\n" | |
1880 | "res_holder=1\nres_type=%02x\n" | |
1881 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1882 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1883 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1884 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1885 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1886 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1887 | pr_reg->pr_res_mapped_lun); | |
1888 | } else { | |
1889 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1890 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1891 | "sa_res_key=%llu\nres_holder=0\n" | |
1892 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1893 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1894 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1895 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1896 | pr_reg->pr_res_mapped_lun); | |
1897 | } | |
1898 | ||
60d645a4 | 1899 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1900 | pr_err("Unable to update renaming" |
c66ac9db | 1901 | " APTPL metadata\n"); |
0fd97ccf | 1902 | spin_unlock(&dev->t10_pr.registration_lock); |
e3d6f909 | 1903 | return -EMSGSIZE; |
c66ac9db NB |
1904 | } |
1905 | len += sprintf(buf+len, "%s", tmp); | |
1906 | ||
1907 | /* | |
1908 | * Include information about the associated SCSI target port. | |
1909 | */ | |
1910 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1911 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1912 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1913 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1914 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1915 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
1916 | ||
60d645a4 | 1917 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
6708bb27 | 1918 | pr_err("Unable to update renaming" |
c66ac9db | 1919 | " APTPL metadata\n"); |
0fd97ccf | 1920 | spin_unlock(&dev->t10_pr.registration_lock); |
e3d6f909 | 1921 | return -EMSGSIZE; |
c66ac9db NB |
1922 | } |
1923 | len += sprintf(buf+len, "%s", tmp); | |
1924 | reg_count++; | |
1925 | } | |
0fd97ccf | 1926 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db | 1927 | |
6708bb27 | 1928 | if (!reg_count) |
c66ac9db NB |
1929 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1930 | ||
1931 | return 0; | |
1932 | } | |
1933 | ||
1934 | static int core_scsi3_update_aptpl_buf( | |
1935 | struct se_device *dev, | |
1936 | unsigned char *buf, | |
1937 | u32 pr_aptpl_buf_len, | |
1938 | int clear_aptpl_metadata) | |
1939 | { | |
1940 | int ret; | |
1941 | ||
1942 | spin_lock(&dev->dev_reservation_lock); | |
1943 | ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
1944 | clear_aptpl_metadata); | |
1945 | spin_unlock(&dev->dev_reservation_lock); | |
1946 | ||
1947 | return ret; | |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * Called with struct se_device->aptpl_file_mutex held | |
1952 | */ | |
1953 | static int __core_scsi3_write_aptpl_to_file( | |
1954 | struct se_device *dev, | |
1955 | unsigned char *buf, | |
1956 | u32 pr_aptpl_buf_len) | |
1957 | { | |
0fd97ccf | 1958 | struct t10_wwn *wwn = &dev->t10_wwn; |
c66ac9db NB |
1959 | struct file *file; |
1960 | struct iovec iov[1]; | |
1961 | mm_segment_t old_fs; | |
1962 | int flags = O_RDWR | O_CREAT | O_TRUNC; | |
1963 | char path[512]; | |
1964 | int ret; | |
1965 | ||
1966 | memset(iov, 0, sizeof(struct iovec)); | |
1967 | memset(path, 0, 512); | |
1968 | ||
60d645a4 | 1969 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 1970 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 1971 | " into path buffer\n"); |
e3d6f909 | 1972 | return -EMSGSIZE; |
c66ac9db NB |
1973 | } |
1974 | ||
1975 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
1976 | file = filp_open(path, flags, 0600); | |
1977 | if (IS_ERR(file) || !file || !file->f_dentry) { | |
6708bb27 | 1978 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 1979 | " failed\n", path); |
d35212f3 | 1980 | return IS_ERR(file) ? PTR_ERR(file) : -ENOENT; |
c66ac9db NB |
1981 | } |
1982 | ||
1983 | iov[0].iov_base = &buf[0]; | |
6708bb27 | 1984 | if (!pr_aptpl_buf_len) |
c66ac9db NB |
1985 | iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ |
1986 | else | |
1987 | iov[0].iov_len = pr_aptpl_buf_len; | |
1988 | ||
1989 | old_fs = get_fs(); | |
1990 | set_fs(get_ds()); | |
1991 | ret = vfs_writev(file, &iov[0], 1, &file->f_pos); | |
1992 | set_fs(old_fs); | |
1993 | ||
1994 | if (ret < 0) { | |
6708bb27 | 1995 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
c66ac9db | 1996 | filp_close(file, NULL); |
e3d6f909 | 1997 | return -EIO; |
c66ac9db NB |
1998 | } |
1999 | filp_close(file, NULL); | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
de103c93 CH |
2004 | static int |
2005 | core_scsi3_update_and_write_aptpl(struct se_device *dev, unsigned char *in_buf, | |
2006 | u32 in_pr_aptpl_buf_len) | |
c66ac9db NB |
2007 | { |
2008 | unsigned char null_buf[64], *buf; | |
2009 | u32 pr_aptpl_buf_len; | |
de103c93 CH |
2010 | int clear_aptpl_metadata = 0; |
2011 | int ret; | |
2012 | ||
c66ac9db NB |
2013 | /* |
2014 | * Can be called with a NULL pointer from PROUT service action CLEAR | |
2015 | */ | |
6708bb27 | 2016 | if (!in_buf) { |
c66ac9db NB |
2017 | memset(null_buf, 0, 64); |
2018 | buf = &null_buf[0]; | |
2019 | /* | |
2020 | * This will clear the APTPL metadata to: | |
2021 | * "No Registrations or Reservations" status | |
2022 | */ | |
2023 | pr_aptpl_buf_len = 64; | |
2024 | clear_aptpl_metadata = 1; | |
2025 | } else { | |
2026 | buf = in_buf; | |
2027 | pr_aptpl_buf_len = in_pr_aptpl_buf_len; | |
2028 | } | |
2029 | ||
2030 | ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, | |
2031 | clear_aptpl_metadata); | |
2032 | if (ret != 0) | |
e3d6f909 | 2033 | return ret; |
de103c93 | 2034 | |
c66ac9db NB |
2035 | /* |
2036 | * __core_scsi3_write_aptpl_to_file() will call strlen() | |
2037 | * on the passed buf to determine pr_aptpl_buf_len. | |
2038 | */ | |
de103c93 | 2039 | return __core_scsi3_write_aptpl_to_file(dev, buf, 0); |
c66ac9db NB |
2040 | } |
2041 | ||
de103c93 CH |
2042 | static sense_reason_t |
2043 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, | |
2044 | int aptpl, int all_tg_pt, int spec_i_pt, int ignore_key) | |
c66ac9db | 2045 | { |
e3d6f909 | 2046 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2047 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2048 | struct se_dev_entry *se_deve; |
e3d6f909 | 2049 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
2050 | struct se_portal_group *se_tpg; |
2051 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; | |
0fd97ccf | 2052 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
2053 | /* Used for APTPL metadata w/ UNREGISTER */ |
2054 | unsigned char *pr_aptpl_buf = NULL; | |
2055 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
a0d50f62 | 2056 | sense_reason_t ret = TCM_NO_SENSE; |
de103c93 | 2057 | int pr_holder = 0, type; |
c66ac9db | 2058 | |
6708bb27 AG |
2059 | if (!se_sess || !se_lun) { |
2060 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2061 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2062 | } |
2063 | se_tpg = se_sess->se_tpg; | |
f2083241 | 2064 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db | 2065 | |
e3d6f909 | 2066 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2067 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2068 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2069 | PR_REG_ISID_LEN); |
2070 | isid_ptr = &isid_buf[0]; | |
2071 | } | |
2072 | /* | |
2073 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2074 | */ | |
2075 | pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 | 2076 | if (!pr_reg_e) { |
c66ac9db | 2077 | if (res_key) { |
6708bb27 | 2078 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2079 | " for SA REGISTER, returning CONFLICT\n"); |
de103c93 | 2080 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2081 | } |
2082 | /* | |
2083 | * Do nothing but return GOOD status. | |
2084 | */ | |
6708bb27 | 2085 | if (!sa_res_key) |
03e98c9e | 2086 | return 0; |
c66ac9db | 2087 | |
6708bb27 | 2088 | if (!spec_i_pt) { |
c66ac9db NB |
2089 | /* |
2090 | * Perform the Service Action REGISTER on the Initiator | |
2091 | * Port Endpoint that the PRO was received from on the | |
2092 | * Logical Unit of the SCSI device server. | |
2093 | */ | |
de103c93 | 2094 | if (core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
2095 | se_sess->se_node_acl, se_deve, isid_ptr, |
2096 | sa_res_key, all_tg_pt, aptpl, | |
de103c93 | 2097 | ignore_key, 0)) { |
6708bb27 | 2098 | pr_err("Unable to allocate" |
c66ac9db | 2099 | " struct t10_pr_registration\n"); |
de103c93 | 2100 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2101 | } |
2102 | } else { | |
2103 | /* | |
2104 | * Register both the Initiator port that received | |
2105 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2106 | * TransportID from Parameter list and loop through | |
2107 | * fabric dependent parameter list while calling | |
2108 | * logic from of core_scsi3_alloc_registration() for | |
2109 | * each TransportID provided SCSI Initiator Port/Device | |
2110 | */ | |
2111 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2112 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2113 | if (ret != 0) | |
2114 | return ret; | |
2115 | } | |
2116 | /* | |
2117 | * Nothing left to do for the APTPL=0 case. | |
2118 | */ | |
6708bb27 | 2119 | if (!aptpl) { |
c66ac9db | 2120 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 2121 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2122 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
2123 | " REGISTER\n"); |
2124 | return 0; | |
2125 | } | |
2126 | /* | |
2127 | * Locate the newly allocated local I_T Nexus *pr_reg, and | |
2128 | * update the APTPL metadata information using its | |
2129 | * preallocated *pr_reg->pr_aptpl_buf. | |
2130 | */ | |
5951146d | 2131 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db NB |
2132 | se_sess->se_node_acl, se_sess); |
2133 | ||
de103c93 | 2134 | if (core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db | 2135 | &pr_reg->pr_aptpl_buf[0], |
de103c93 | 2136 | pr_tmpl->pr_aptpl_buf_len)) { |
c66ac9db | 2137 | pr_tmpl->pr_aptpl_active = 1; |
6708bb27 | 2138 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); |
c66ac9db NB |
2139 | } |
2140 | ||
de103c93 CH |
2141 | goto out_put_pr_reg; |
2142 | } | |
2143 | ||
2144 | /* | |
2145 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2146 | */ | |
2147 | pr_reg = pr_reg_e; | |
2148 | type = pr_reg->pr_res_type; | |
2149 | ||
2150 | if (!ignore_key) { | |
2151 | if (res_key != pr_reg->pr_res_key) { | |
2152 | pr_err("SPC-3 PR REGISTER: Received" | |
2153 | " res_key: 0x%016Lx does not match" | |
2154 | " existing SA REGISTER res_key:" | |
2155 | " 0x%016Lx\n", res_key, | |
2156 | pr_reg->pr_res_key); | |
2157 | ret = TCM_RESERVATION_CONFLICT; | |
2158 | goto out_put_pr_reg; | |
c66ac9db | 2159 | } |
de103c93 CH |
2160 | } |
2161 | ||
2162 | if (spec_i_pt) { | |
2163 | pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT" | |
2164 | " set while sa_res_key=0\n"); | |
2165 | ret = TCM_INVALID_PARAMETER_LIST; | |
2166 | goto out_put_pr_reg; | |
2167 | } | |
2168 | ||
2169 | /* | |
2170 | * An existing ALL_TG_PT=1 registration being released | |
2171 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2172 | */ | |
2173 | if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { | |
2174 | pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1" | |
2175 | " registration exists, but ALL_TG_PT=1 bit not" | |
2176 | " present in received PROUT\n"); | |
2177 | ret = TCM_INVALID_CDB_FIELD; | |
2178 | goto out_put_pr_reg; | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * Allocate APTPL metadata buffer used for UNREGISTER ops | |
2183 | */ | |
2184 | if (aptpl) { | |
2185 | pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, | |
2186 | GFP_KERNEL); | |
2187 | if (!pr_aptpl_buf) { | |
2188 | pr_err("Unable to allocate" | |
2189 | " pr_aptpl_buf\n"); | |
2190 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2191 | goto out_put_pr_reg; | |
c66ac9db | 2192 | } |
de103c93 CH |
2193 | } |
2194 | ||
2195 | /* | |
2196 | * sa_res_key=0 Unregister Reservation Key for registered I_T | |
2197 | * Nexus sa_res_key=1 Change Reservation Key for registered I_T | |
2198 | * Nexus. | |
2199 | */ | |
2200 | if (!sa_res_key) { | |
2201 | pr_holder = core_scsi3_check_implict_release( | |
2202 | cmd->se_dev, pr_reg); | |
2203 | if (pr_holder < 0) { | |
2204 | kfree(pr_aptpl_buf); | |
2205 | ret = TCM_RESERVATION_CONFLICT; | |
2206 | goto out_put_pr_reg; | |
c66ac9db | 2207 | } |
de103c93 CH |
2208 | |
2209 | spin_lock(&pr_tmpl->registration_lock); | |
c66ac9db | 2210 | /* |
de103c93 CH |
2211 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
2212 | * and matching pr_res_key. | |
c66ac9db | 2213 | */ |
de103c93 CH |
2214 | if (pr_reg->pr_reg_all_tg_pt) { |
2215 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2216 | &pr_tmpl->registration_list, | |
2217 | pr_reg_list) { | |
2218 | ||
2219 | if (!pr_reg_p->pr_reg_all_tg_pt) | |
2220 | continue; | |
2221 | if (pr_reg_p->pr_res_key != res_key) | |
2222 | continue; | |
2223 | if (pr_reg == pr_reg_p) | |
2224 | continue; | |
2225 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2226 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2227 | continue; | |
2228 | ||
2229 | __core_scsi3_free_registration(dev, | |
2230 | pr_reg_p, NULL, 0); | |
c66ac9db NB |
2231 | } |
2232 | } | |
de103c93 | 2233 | |
c66ac9db | 2234 | /* |
de103c93 | 2235 | * Release the calling I_T Nexus registration now.. |
c66ac9db | 2236 | */ |
de103c93 | 2237 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
c66ac9db | 2238 | |
de103c93 CH |
2239 | /* |
2240 | * From spc4r17, section 5.7.11.3 Unregistering | |
2241 | * | |
2242 | * If the persistent reservation is a registrants only | |
2243 | * type, the device server shall establish a unit | |
2244 | * attention condition for the initiator port associated | |
2245 | * with every registered I_T nexus except for the I_T | |
2246 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2247 | * received, with the additional sense code set to | |
2248 | * RESERVATIONS RELEASED. | |
2249 | */ | |
2250 | if (pr_holder && | |
2251 | (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || | |
2252 | type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { | |
2253 | list_for_each_entry(pr_reg_p, | |
2254 | &pr_tmpl->registration_list, | |
2255 | pr_reg_list) { | |
2256 | ||
2257 | core_scsi3_ua_allocate( | |
2258 | pr_reg_p->pr_reg_nacl, | |
2259 | pr_reg_p->pr_res_mapped_lun, | |
2260 | 0x2A, | |
2261 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
c66ac9db | 2262 | } |
de103c93 CH |
2263 | } |
2264 | spin_unlock(&pr_tmpl->registration_lock); | |
c66ac9db | 2265 | |
de103c93 CH |
2266 | if (!aptpl) { |
2267 | pr_tmpl->pr_aptpl_active = 0; | |
2268 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2269 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" | |
2270 | " for UNREGISTER\n"); | |
2271 | return 0; | |
2272 | } | |
c66ac9db | 2273 | |
de103c93 CH |
2274 | if (!core_scsi3_update_and_write_aptpl(dev, &pr_aptpl_buf[0], |
2275 | pr_tmpl->pr_aptpl_buf_len)) { | |
2276 | pr_tmpl->pr_aptpl_active = 1; | |
2277 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" | |
2278 | " for UNREGISTER\n"); | |
2279 | } | |
c66ac9db | 2280 | |
de103c93 CH |
2281 | goto out_free_aptpl_buf; |
2282 | } | |
c66ac9db | 2283 | |
de103c93 CH |
2284 | /* |
2285 | * Increment PRgeneration counter for struct se_device" | |
2286 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2287 | * READ_KEYS service action. | |
2288 | */ | |
2289 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); | |
2290 | pr_reg->pr_res_key = sa_res_key; | |
2291 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2292 | " Key for %s to: 0x%016Lx PRgeneration:" | |
2293 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), | |
2294 | (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", | |
2295 | pr_reg->pr_reg_nacl->initiatorname, | |
2296 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
c66ac9db | 2297 | |
de103c93 CH |
2298 | if (!aptpl) { |
2299 | pr_tmpl->pr_aptpl_active = 0; | |
2300 | core_scsi3_update_and_write_aptpl(dev, NULL, 0); | |
2301 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated" | |
2302 | " for REGISTER\n"); | |
2303 | ret = 0; | |
2304 | goto out_put_pr_reg; | |
c66ac9db | 2305 | } |
de103c93 CH |
2306 | |
2307 | if (!core_scsi3_update_and_write_aptpl(dev, &pr_aptpl_buf[0], | |
2308 | pr_tmpl->pr_aptpl_buf_len)) { | |
2309 | pr_tmpl->pr_aptpl_active = 1; | |
2310 | pr_debug("SPC-3 PR: Set APTPL Bit Activated" | |
2311 | " for REGISTER\n"); | |
2312 | } | |
2313 | ||
2314 | out_free_aptpl_buf: | |
2315 | kfree(pr_aptpl_buf); | |
2316 | ret = 0; | |
2317 | out_put_pr_reg: | |
2318 | core_scsi3_put_pr_reg(pr_reg); | |
2319 | return ret; | |
c66ac9db NB |
2320 | } |
2321 | ||
2322 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2323 | { | |
2324 | switch (type) { | |
2325 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2326 | return "Write Exclusive Access"; | |
2327 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2328 | return "Exclusive Access"; | |
2329 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2330 | return "Write Exclusive Access, Registrants Only"; | |
2331 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2332 | return "Exclusive Access, Registrants Only"; | |
2333 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2334 | return "Write Exclusive Access, All Registrants"; | |
2335 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2336 | return "Exclusive Access, All Registrants"; | |
2337 | default: | |
2338 | break; | |
2339 | } | |
2340 | ||
2341 | return "Unknown SPC-3 PR Type"; | |
2342 | } | |
2343 | ||
de103c93 CH |
2344 | static sense_reason_t |
2345 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) | |
c66ac9db | 2346 | { |
de103c93 | 2347 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2348 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2349 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2350 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
0fd97ccf | 2351 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2352 | char i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 CH |
2353 | sense_reason_t ret; |
2354 | int prf_isid; | |
c66ac9db NB |
2355 | |
2356 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2357 | ||
6708bb27 AG |
2358 | if (!se_sess || !se_lun) { |
2359 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2360 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2361 | } |
c66ac9db NB |
2362 | /* |
2363 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2364 | */ | |
5951146d | 2365 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2366 | se_sess); |
6708bb27 AG |
2367 | if (!pr_reg) { |
2368 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2369 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
de103c93 | 2370 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2371 | } |
2372 | /* | |
2373 | * From spc4r17 Section 5.7.9: Reserving: | |
2374 | * | |
2375 | * An application client creates a persistent reservation by issuing | |
2376 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2377 | * a registered I_T nexus with the following parameters: | |
2378 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2379 | * registered with the logical unit for the I_T nexus; and | |
2380 | */ | |
2381 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2382 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2383 | " does not match existing SA REGISTER res_key:" |
2384 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
2385 | ret = TCM_RESERVATION_CONFLICT; |
2386 | goto out_put_pr_reg; | |
c66ac9db NB |
2387 | } |
2388 | /* | |
2389 | * From spc4r17 Section 5.7.9: Reserving: | |
2390 | * | |
2391 | * From above: | |
2392 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2393 | * being created. | |
2394 | * | |
2395 | * Only one persistent reservation is allowed at a time per logical unit | |
2396 | * and that persistent reservation has a scope of LU_SCOPE. | |
2397 | */ | |
2398 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2399 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
de103c93 CH |
2400 | ret = TCM_INVALID_PARAMETER_LIST; |
2401 | goto out_put_pr_reg; | |
c66ac9db NB |
2402 | } |
2403 | /* | |
2404 | * See if we have an existing PR reservation holder pointer at | |
2405 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2406 | * *pr_res_holder. | |
2407 | */ | |
2408 | spin_lock(&dev->dev_reservation_lock); | |
2409 | pr_res_holder = dev->dev_pr_res_holder; | |
ee1b1b9c | 2410 | if (pr_res_holder) { |
c66ac9db NB |
2411 | /* |
2412 | * From spc4r17 Section 5.7.9: Reserving: | |
2413 | * | |
2414 | * If the device server receives a PERSISTENT RESERVE OUT | |
2415 | * command from an I_T nexus other than a persistent reservation | |
2416 | * holder (see 5.7.10) that attempts to create a persistent | |
2417 | * reservation when a persistent reservation already exists for | |
2418 | * the logical unit, then the command shall be completed with | |
2419 | * RESERVATION CONFLICT status. | |
2420 | */ | |
2421 | if (pr_res_holder != pr_reg) { | |
2422 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2423 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2424 | " [%s]: %s while reservation already held by" |
2425 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2426 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2427 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2428 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2429 | pr_res_holder->pr_reg_nacl->initiatorname); |
2430 | ||
2431 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2432 | ret = TCM_RESERVATION_CONFLICT; |
2433 | goto out_put_pr_reg; | |
c66ac9db NB |
2434 | } |
2435 | /* | |
2436 | * From spc4r17 Section 5.7.9: Reserving: | |
2437 | * | |
2438 | * If a persistent reservation holder attempts to modify the | |
2439 | * type or scope of an existing persistent reservation, the | |
2440 | * command shall be completed with RESERVATION CONFLICT status. | |
2441 | */ | |
2442 | if ((pr_res_holder->pr_res_type != type) || | |
2443 | (pr_res_holder->pr_res_scope != scope)) { | |
2444 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2445 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2446 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2447 | " while reservation already held by [%s]: %s," | |
2448 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2449 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2450 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2451 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2452 | pr_res_holder->pr_reg_nacl->initiatorname); |
2453 | ||
2454 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2455 | ret = TCM_RESERVATION_CONFLICT; |
2456 | goto out_put_pr_reg; | |
c66ac9db NB |
2457 | } |
2458 | /* | |
2459 | * From spc4r17 Section 5.7.9: Reserving: | |
2460 | * | |
2461 | * If the device server receives a PERSISTENT RESERVE OUT | |
2462 | * command with RESERVE service action where the TYPE field and | |
2463 | * the SCOPE field contain the same values as the existing type | |
2464 | * and scope from a persistent reservation holder, it shall not | |
2465 | * make any change to the existing persistent reservation and | |
2466 | * shall completethe command with GOOD status. | |
2467 | */ | |
2468 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2469 | ret = 0; |
2470 | goto out_put_pr_reg; | |
c66ac9db NB |
2471 | } |
2472 | /* | |
2473 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2474 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2475 | */ | |
2476 | pr_reg->pr_res_scope = scope; | |
2477 | pr_reg->pr_res_type = type; | |
2478 | pr_reg->pr_res_holder = 1; | |
2479 | dev->dev_pr_res_holder = pr_reg; | |
2480 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2481 | PR_REG_ISID_ID_LEN); | |
2482 | ||
6708bb27 | 2483 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2484 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2485 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2486 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2487 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2488 | cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2489 | se_sess->se_node_acl->initiatorname, |
2490 | (prf_isid) ? &i_buf[0] : ""); | |
2491 | spin_unlock(&dev->dev_reservation_lock); | |
2492 | ||
2493 | if (pr_tmpl->pr_aptpl_active) { | |
de103c93 | 2494 | if (!core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db | 2495 | &pr_reg->pr_aptpl_buf[0], |
de103c93 | 2496 | pr_tmpl->pr_aptpl_buf_len)) { |
6708bb27 | 2497 | pr_debug("SPC-3 PR: Updated APTPL metadata" |
c66ac9db | 2498 | " for RESERVE\n"); |
de103c93 | 2499 | } |
c66ac9db NB |
2500 | } |
2501 | ||
de103c93 CH |
2502 | ret = 0; |
2503 | out_put_pr_reg: | |
c66ac9db | 2504 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2505 | return ret; |
c66ac9db NB |
2506 | } |
2507 | ||
de103c93 CH |
2508 | static sense_reason_t |
2509 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, | |
2510 | u64 res_key) | |
c66ac9db | 2511 | { |
c66ac9db NB |
2512 | switch (type) { |
2513 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2514 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2515 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2516 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2517 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2518 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 2519 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
c66ac9db | 2520 | default: |
6708bb27 | 2521 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2522 | " 0x%02x\n", type); |
de103c93 | 2523 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 2524 | } |
c66ac9db NB |
2525 | } |
2526 | ||
2527 | /* | |
2528 | * Called with struct se_device->dev_reservation_lock held. | |
2529 | */ | |
2530 | static void __core_scsi3_complete_pro_release( | |
2531 | struct se_device *dev, | |
2532 | struct se_node_acl *se_nacl, | |
2533 | struct t10_pr_registration *pr_reg, | |
2534 | int explict) | |
2535 | { | |
2536 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; | |
2537 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2538 | int prf_isid; | |
2539 | ||
2540 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2541 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2542 | PR_REG_ISID_ID_LEN); | |
2543 | /* | |
2544 | * Go ahead and release the current PR reservation holder. | |
2545 | */ | |
2546 | dev->dev_pr_res_holder = NULL; | |
2547 | ||
6708bb27 | 2548 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" |
c66ac9db NB |
2549 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2550 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", | |
2551 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), | |
2552 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2553 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db NB |
2554 | tfo->get_fabric_name(), se_nacl->initiatorname, |
2555 | (prf_isid) ? &i_buf[0] : ""); | |
2556 | /* | |
2557 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2558 | */ | |
2559 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2560 | } | |
2561 | ||
de103c93 CH |
2562 | static sense_reason_t |
2563 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, | |
2564 | u64 res_key) | |
c66ac9db NB |
2565 | { |
2566 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2567 | struct se_session *se_sess = cmd->se_sess; |
2568 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2569 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
0fd97ccf | 2570 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
de103c93 CH |
2571 | int all_reg = 0; |
2572 | sense_reason_t ret = 0; | |
c66ac9db | 2573 | |
6708bb27 AG |
2574 | if (!se_sess || !se_lun) { |
2575 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2576 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2577 | } |
2578 | /* | |
2579 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2580 | */ | |
2581 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2582 | if (!pr_reg) { |
2583 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2584 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
de103c93 | 2585 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2586 | } |
2587 | /* | |
2588 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2589 | * | |
2590 | * If there is no persistent reservation or in response to a persistent | |
2591 | * reservation release request from a registered I_T nexus that is not a | |
2592 | * persistent reservation holder (see 5.7.10), the device server shall | |
2593 | * do the following: | |
2594 | * | |
2595 | * a) Not release the persistent reservation, if any; | |
2596 | * b) Not remove any registrations; and | |
2597 | * c) Complete the command with GOOD status. | |
2598 | */ | |
2599 | spin_lock(&dev->dev_reservation_lock); | |
2600 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2601 | if (!pr_res_holder) { |
c66ac9db NB |
2602 | /* |
2603 | * No persistent reservation, return GOOD status. | |
2604 | */ | |
2605 | spin_unlock(&dev->dev_reservation_lock); | |
bb7a8c8e | 2606 | goto out_put_pr_reg; |
c66ac9db NB |
2607 | } |
2608 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2609 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
2610 | all_reg = 1; | |
2611 | ||
2612 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { | |
2613 | /* | |
2614 | * Non 'All Registrants' PR Type cases.. | |
2615 | * Release request from a registered I_T nexus that is not a | |
2616 | * persistent reservation holder. return GOOD status. | |
2617 | */ | |
2618 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 2619 | goto out_put_pr_reg; |
c66ac9db | 2620 | } |
de103c93 | 2621 | |
c66ac9db NB |
2622 | /* |
2623 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2624 | * | |
2625 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2626 | * release a persistent reservation. | |
2627 | * | |
2628 | * An application client releases the persistent reservation by issuing | |
2629 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2630 | * an I_T nexus that is a persistent reservation holder with the | |
2631 | * following parameters: | |
2632 | * | |
2633 | * a) RESERVATION KEY field set to the value of the reservation key | |
2634 | * that is registered with the logical unit for the I_T nexus; | |
2635 | */ | |
2636 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2637 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2638 | " does not match existing SA REGISTER res_key:" |
2639 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2640 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2641 | ret = TCM_RESERVATION_CONFLICT; |
2642 | goto out_put_pr_reg; | |
c66ac9db NB |
2643 | } |
2644 | /* | |
2645 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2646 | * | |
2647 | * b) TYPE field and SCOPE field set to match the persistent | |
2648 | * reservation being released. | |
2649 | */ | |
2650 | if ((pr_res_holder->pr_res_type != type) || | |
2651 | (pr_res_holder->pr_res_scope != scope)) { | |
2652 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2653 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2654 | " reservation from [%s]: %s with different TYPE " |
2655 | "and/or SCOPE while reservation already held by" | |
2656 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2657 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2658 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2659 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2660 | pr_res_holder->pr_reg_nacl->initiatorname); |
2661 | ||
2662 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2663 | ret = TCM_RESERVATION_CONFLICT; |
2664 | goto out_put_pr_reg; | |
c66ac9db NB |
2665 | } |
2666 | /* | |
2667 | * In response to a persistent reservation release request from the | |
2668 | * persistent reservation holder the device server shall perform a | |
2669 | * release by doing the following as an uninterrupted series of actions: | |
2670 | * a) Release the persistent reservation; | |
2671 | * b) Not remove any registration(s); | |
2672 | * c) If the released persistent reservation is a registrants only type | |
2673 | * or all registrants type persistent reservation, | |
2674 | * the device server shall establish a unit attention condition for | |
2675 | * the initiator port associated with every regis- | |
2676 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2677 | * RESERVE OUT command with RELEASE service action was received, | |
2678 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2679 | * d) If the persistent reservation is of any other type, the device | |
2680 | * server shall not establish a unit attention condition. | |
2681 | */ | |
2682 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
2683 | pr_reg, 1); | |
2684 | ||
2685 | spin_unlock(&dev->dev_reservation_lock); | |
2686 | ||
2687 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2688 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2689 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2690 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2691 | /* | |
2692 | * If no UNIT ATTENTION conditions will be established for | |
2693 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2694 | * go ahead and check for APTPL=1 update+write below | |
2695 | */ | |
2696 | goto write_aptpl; | |
2697 | } | |
2698 | ||
2699 | spin_lock(&pr_tmpl->registration_lock); | |
2700 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2701 | pr_reg_list) { | |
2702 | /* | |
2703 | * Do not establish a UNIT ATTENTION condition | |
2704 | * for the calling I_T Nexus | |
2705 | */ | |
2706 | if (pr_reg_p == pr_reg) | |
2707 | continue; | |
2708 | ||
2709 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2710 | pr_reg_p->pr_res_mapped_lun, | |
2711 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2712 | } | |
2713 | spin_unlock(&pr_tmpl->registration_lock); | |
2714 | ||
2715 | write_aptpl: | |
2716 | if (pr_tmpl->pr_aptpl_active) { | |
de103c93 CH |
2717 | if (!core_scsi3_update_and_write_aptpl(cmd->se_dev, |
2718 | &pr_reg->pr_aptpl_buf[0], pr_tmpl->pr_aptpl_buf_len)) { | |
6708bb27 | 2719 | pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); |
de103c93 | 2720 | } |
c66ac9db | 2721 | } |
de103c93 | 2722 | out_put_pr_reg: |
c66ac9db | 2723 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2724 | return ret; |
c66ac9db NB |
2725 | } |
2726 | ||
de103c93 CH |
2727 | static sense_reason_t |
2728 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) | |
c66ac9db NB |
2729 | { |
2730 | struct se_device *dev = cmd->se_dev; | |
2731 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 2732 | struct se_session *se_sess = cmd->se_sess; |
0fd97ccf | 2733 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
2734 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2735 | u32 pr_res_mapped_lun = 0; | |
2736 | int calling_it_nexus = 0; | |
2737 | /* | |
2738 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2739 | */ | |
5951146d | 2740 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2741 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2742 | if (!pr_reg_n) { |
2743 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2744 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
de103c93 | 2745 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2746 | } |
2747 | /* | |
2748 | * From spc4r17 section 5.7.11.6, Clearing: | |
2749 | * | |
2750 | * Any application client may release the persistent reservation and | |
2751 | * remove all registrations from a device server by issuing a | |
2752 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2753 | * registered I_T nexus with the following parameter: | |
2754 | * | |
2755 | * a) RESERVATION KEY field set to the value of the reservation key | |
2756 | * that is registered with the logical unit for the I_T nexus. | |
2757 | */ | |
2758 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2759 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2760 | " res_key: 0x%016Lx does not match" |
2761 | " existing SA REGISTER res_key:" | |
2762 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2763 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2764 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2765 | } |
2766 | /* | |
2767 | * a) Release the persistent reservation, if any; | |
2768 | */ | |
2769 | spin_lock(&dev->dev_reservation_lock); | |
2770 | pr_res_holder = dev->dev_pr_res_holder; | |
2771 | if (pr_res_holder) { | |
2772 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2773 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
2774 | pr_res_holder, 0); | |
2775 | } | |
2776 | spin_unlock(&dev->dev_reservation_lock); | |
2777 | /* | |
2778 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2779 | */ | |
2780 | spin_lock(&pr_tmpl->registration_lock); | |
2781 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2782 | &pr_tmpl->registration_list, pr_reg_list) { | |
2783 | ||
2784 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2785 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2786 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2787 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2788 | calling_it_nexus); | |
2789 | /* | |
2790 | * e) Establish a unit attention condition for the initiator | |
2791 | * port associated with every registered I_T nexus other | |
2792 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2793 | * command with CLEAR service action was received, with the | |
2794 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2795 | */ | |
6708bb27 | 2796 | if (!calling_it_nexus) |
c66ac9db NB |
2797 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2798 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2799 | } | |
2800 | spin_unlock(&pr_tmpl->registration_lock); | |
2801 | ||
6708bb27 | 2802 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2803 | cmd->se_tfo->get_fabric_name()); |
c66ac9db NB |
2804 | |
2805 | if (pr_tmpl->pr_aptpl_active) { | |
5951146d | 2806 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 2807 | pr_debug("SPC-3 PR: Updated APTPL metadata" |
c66ac9db NB |
2808 | " for CLEAR\n"); |
2809 | } | |
2810 | ||
2811 | core_scsi3_pr_generation(dev); | |
2812 | return 0; | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * Called with struct se_device->dev_reservation_lock held. | |
2817 | */ | |
2818 | static void __core_scsi3_complete_pro_preempt( | |
2819 | struct se_device *dev, | |
2820 | struct t10_pr_registration *pr_reg, | |
2821 | struct list_head *preempt_and_abort_list, | |
2822 | int type, | |
2823 | int scope, | |
2824 | int abort) | |
2825 | { | |
2826 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
2827 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; | |
2828 | char i_buf[PR_REG_ISID_ID_LEN]; | |
2829 | int prf_isid; | |
2830 | ||
2831 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2832 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
2833 | PR_REG_ISID_ID_LEN); | |
2834 | /* | |
2835 | * Do an implict RELEASE of the existing reservation. | |
2836 | */ | |
2837 | if (dev->dev_pr_res_holder) | |
2838 | __core_scsi3_complete_pro_release(dev, nacl, | |
2839 | dev->dev_pr_res_holder, 0); | |
2840 | ||
2841 | dev->dev_pr_res_holder = pr_reg; | |
2842 | pr_reg->pr_res_holder = 1; | |
2843 | pr_reg->pr_res_type = type; | |
2844 | pr_reg->pr_res_scope = scope; | |
2845 | ||
6708bb27 | 2846 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db NB |
2847 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
2848 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", | |
2849 | core_scsi3_pr_dump_type(type), | |
2850 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2851 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
c66ac9db NB |
2852 | tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", |
2853 | nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); | |
2854 | /* | |
2855 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2856 | * struct t10_pr_registration to the list that will be compared | |
2857 | * against received CDBs.. | |
2858 | */ | |
2859 | if (preempt_and_abort_list) | |
2860 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2861 | preempt_and_abort_list); | |
2862 | } | |
2863 | ||
2864 | static void core_scsi3_release_preempt_and_abort( | |
2865 | struct list_head *preempt_and_abort_list, | |
2866 | struct t10_pr_registration *pr_reg_holder) | |
2867 | { | |
2868 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2869 | ||
2870 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2871 | pr_reg_abort_list) { | |
2872 | ||
2873 | list_del(&pr_reg->pr_reg_abort_list); | |
2874 | if (pr_reg_holder == pr_reg) | |
2875 | continue; | |
2876 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2877 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2878 | continue; |
2879 | } | |
2880 | ||
2881 | pr_reg->pr_reg_deve = NULL; | |
2882 | pr_reg->pr_reg_nacl = NULL; | |
2883 | kfree(pr_reg->pr_aptpl_buf); | |
2884 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
2885 | } | |
2886 | } | |
2887 | ||
de103c93 CH |
2888 | static sense_reason_t |
2889 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, | |
2890 | u64 sa_res_key, int abort) | |
c66ac9db | 2891 | { |
5951146d | 2892 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2893 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2894 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2895 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2896 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
0fd97ccf | 2897 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
2898 | u32 pr_res_mapped_lun = 0; |
2899 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; | |
de103c93 | 2900 | int prh_type = 0, prh_scope = 0; |
c66ac9db | 2901 | |
de103c93 CH |
2902 | if (!se_sess) |
2903 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2904 | |
5951146d | 2905 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2906 | se_sess); |
6708bb27 AG |
2907 | if (!pr_reg_n) { |
2908 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db NB |
2909 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
2910 | (abort) ? "_AND_ABORT" : ""); | |
de103c93 | 2911 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2912 | } |
2913 | if (pr_reg_n->pr_res_key != res_key) { | |
2914 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2915 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2916 | } |
2917 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2918 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2919 | core_scsi3_put_pr_reg(pr_reg_n); |
de103c93 | 2920 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 2921 | } |
c66ac9db NB |
2922 | |
2923 | spin_lock(&dev->dev_reservation_lock); | |
2924 | pr_res_holder = dev->dev_pr_res_holder; | |
2925 | if (pr_res_holder && | |
2926 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2927 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2928 | all_reg = 1; | |
2929 | ||
6708bb27 | 2930 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
2931 | spin_unlock(&dev->dev_reservation_lock); |
2932 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2933 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2934 | } |
2935 | /* | |
2936 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
2937 | * | |
2938 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
2939 | * persistent reservation holder or there is no persistent reservation | |
2940 | * holder (i.e., there is no persistent reservation), then the device | |
2941 | * server shall perform a preempt by doing the following in an | |
2942 | * uninterrupted series of actions. (See below..) | |
2943 | */ | |
6708bb27 | 2944 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
2945 | /* |
2946 | * No existing or SA Reservation Key matching reservations.. | |
2947 | * | |
2948 | * PROUT SA PREEMPT with All Registrant type reservations are | |
2949 | * allowed to be processed without a matching SA Reservation Key | |
2950 | */ | |
2951 | spin_lock(&pr_tmpl->registration_lock); | |
2952 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2953 | &pr_tmpl->registration_list, pr_reg_list) { | |
2954 | /* | |
2955 | * Removing of registrations in non all registrants | |
2956 | * type reservations without a matching SA reservation | |
2957 | * key. | |
2958 | * | |
2959 | * a) Remove the registrations for all I_T nexuses | |
2960 | * specified by the SERVICE ACTION RESERVATION KEY | |
2961 | * field; | |
2962 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
2963 | * c) Process tasks as defined in 5.7.1; and | |
2964 | * d) Establish a unit attention condition for the | |
2965 | * initiator port associated with every I_T nexus | |
2966 | * that lost its registration other than the I_T | |
2967 | * nexus on which the PERSISTENT RESERVE OUT command | |
2968 | * was received, with the additional sense code set | |
2969 | * to REGISTRATIONS PREEMPTED. | |
2970 | */ | |
6708bb27 | 2971 | if (!all_reg) { |
c66ac9db NB |
2972 | if (pr_reg->pr_res_key != sa_res_key) |
2973 | continue; | |
2974 | ||
2975 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2976 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2977 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2978 | __core_scsi3_free_registration(dev, pr_reg, | |
2979 | (abort) ? &preempt_and_abort_list : | |
2980 | NULL, calling_it_nexus); | |
2981 | released_regs++; | |
2982 | } else { | |
2983 | /* | |
2984 | * Case for any existing all registrants type | |
2985 | * reservation, follow logic in spc4r17 section | |
2986 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
2987 | * | |
2988 | * For a ZERO SA Reservation key, release | |
2989 | * all other registrations and do an implict | |
2990 | * release of active persistent reservation. | |
2991 | * | |
2992 | * For a non-ZERO SA Reservation key, only | |
2993 | * release the matching reservation key from | |
2994 | * registrations. | |
2995 | */ | |
2996 | if ((sa_res_key) && | |
2997 | (pr_reg->pr_res_key != sa_res_key)) | |
2998 | continue; | |
2999 | ||
3000 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3001 | if (calling_it_nexus) | |
3002 | continue; | |
3003 | ||
3004 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3005 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3006 | __core_scsi3_free_registration(dev, pr_reg, | |
3007 | (abort) ? &preempt_and_abort_list : | |
3008 | NULL, 0); | |
3009 | released_regs++; | |
3010 | } | |
6708bb27 | 3011 | if (!calling_it_nexus) |
c66ac9db NB |
3012 | core_scsi3_ua_allocate(pr_reg_nacl, |
3013 | pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3014 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3015 | } |
3016 | spin_unlock(&pr_tmpl->registration_lock); | |
3017 | /* | |
3018 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
3019 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
3020 | * RESERVATION KEY field to a value that does not match any | |
3021 | * registered reservation key, then the device server shall | |
3022 | * complete the command with RESERVATION CONFLICT status. | |
3023 | */ | |
6708bb27 | 3024 | if (!released_regs) { |
c66ac9db NB |
3025 | spin_unlock(&dev->dev_reservation_lock); |
3026 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 3027 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3028 | } |
3029 | /* | |
3030 | * For an existing all registrants type reservation | |
3031 | * with a zero SA rservation key, preempt the existing | |
3032 | * reservation with the new PR type and scope. | |
3033 | */ | |
3034 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
3035 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3036 | (abort) ? &preempt_and_abort_list : NULL, | |
3037 | type, scope, abort); | |
3038 | ||
3039 | if (abort) | |
3040 | core_scsi3_release_preempt_and_abort( | |
3041 | &preempt_and_abort_list, pr_reg_n); | |
3042 | } | |
3043 | spin_unlock(&dev->dev_reservation_lock); | |
3044 | ||
3045 | if (pr_tmpl->pr_aptpl_active) { | |
de103c93 | 3046 | if (!core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db | 3047 | &pr_reg_n->pr_aptpl_buf[0], |
de103c93 | 3048 | pr_tmpl->pr_aptpl_buf_len)) { |
6708bb27 | 3049 | pr_debug("SPC-3 PR: Updated APTPL" |
c66ac9db NB |
3050 | " metadata for PREEMPT%s\n", (abort) ? |
3051 | "_AND_ABORT" : ""); | |
de103c93 | 3052 | } |
c66ac9db NB |
3053 | } |
3054 | ||
3055 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3056 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3057 | return 0; |
3058 | } | |
3059 | /* | |
3060 | * The PREEMPTing SA reservation key matches that of the | |
3061 | * existing persistent reservation, first, we check if | |
3062 | * we are preempting our own reservation. | |
3063 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3064 | * persistent reservations and registration handling | |
3065 | * | |
3066 | * If an all registrants persistent reservation is not | |
3067 | * present, it is not an error for the persistent | |
3068 | * reservation holder to preempt itself (i.e., a | |
3069 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3070 | * or a PREEMPT AND ABORT service action with the | |
3071 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3072 | * persistent reservation holder's reservation key that | |
3073 | * is received from the persistent reservation holder). | |
3074 | * In that case, the device server shall establish the | |
3075 | * new persistent reservation and maintain the | |
3076 | * registration. | |
3077 | */ | |
3078 | prh_type = pr_res_holder->pr_res_type; | |
3079 | prh_scope = pr_res_holder->pr_res_scope; | |
3080 | /* | |
3081 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3082 | * persistent reservation holder (see 5.7.10), the device | |
3083 | * server shall perform a preempt by doing the following as | |
3084 | * an uninterrupted series of actions: | |
3085 | * | |
3086 | * a) Release the persistent reservation for the holder | |
3087 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3088 | */ | |
3089 | if (pr_reg_n != pr_res_holder) | |
3090 | __core_scsi3_complete_pro_release(dev, | |
3091 | pr_res_holder->pr_reg_nacl, | |
3092 | dev->dev_pr_res_holder, 0); | |
3093 | /* | |
3094 | * b) Remove the registrations for all I_T nexuses identified | |
3095 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3096 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3097 | * OUT command. If an all registrants persistent reservation | |
3098 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3099 | * is set to zero, then all registrations shall be removed | |
3100 | * except for that of the I_T nexus that is being used for | |
3101 | * the PERSISTENT RESERVE OUT command; | |
3102 | */ | |
3103 | spin_lock(&pr_tmpl->registration_lock); | |
3104 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3105 | &pr_tmpl->registration_list, pr_reg_list) { | |
3106 | ||
3107 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3108 | if (calling_it_nexus) | |
3109 | continue; | |
3110 | ||
3111 | if (pr_reg->pr_res_key != sa_res_key) | |
3112 | continue; | |
3113 | ||
3114 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3115 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3116 | __core_scsi3_free_registration(dev, pr_reg, | |
3117 | (abort) ? &preempt_and_abort_list : NULL, | |
3118 | calling_it_nexus); | |
3119 | /* | |
3120 | * e) Establish a unit attention condition for the initiator | |
3121 | * port associated with every I_T nexus that lost its | |
3122 | * persistent reservation and/or registration, with the | |
3123 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3124 | */ | |
3125 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3126 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3127 | } |
3128 | spin_unlock(&pr_tmpl->registration_lock); | |
3129 | /* | |
3130 | * c) Establish a persistent reservation for the preempting | |
3131 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3132 | */ | |
3133 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
3134 | (abort) ? &preempt_and_abort_list : NULL, | |
3135 | type, scope, abort); | |
3136 | /* | |
3137 | * d) Process tasks as defined in 5.7.1; | |
3138 | * e) See above.. | |
3139 | * f) If the type or scope has changed, then for every I_T nexus | |
3140 | * whose reservation key was not removed, except for the I_T | |
3141 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3142 | * received, the device server shall establish a unit | |
3143 | * attention condition for the initiator port associated with | |
3144 | * that I_T nexus, with the additional sense code set to | |
3145 | * RESERVATIONS RELEASED. If the type or scope have not | |
3146 | * changed, then no unit attention condition(s) shall be | |
3147 | * established for this reason. | |
3148 | */ | |
3149 | if ((prh_type != type) || (prh_scope != scope)) { | |
3150 | spin_lock(&pr_tmpl->registration_lock); | |
3151 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3152 | &pr_tmpl->registration_list, pr_reg_list) { | |
3153 | ||
3154 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3155 | if (calling_it_nexus) | |
3156 | continue; | |
3157 | ||
3158 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3159 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3160 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3161 | } | |
3162 | spin_unlock(&pr_tmpl->registration_lock); | |
3163 | } | |
3164 | spin_unlock(&dev->dev_reservation_lock); | |
3165 | /* | |
3166 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3167 | * All received CDBs for the matching existing reservation and | |
3168 | * registrations undergo ABORT_TASK logic. | |
3169 | * | |
3170 | * From there, core_scsi3_release_preempt_and_abort() will | |
3171 | * release every registration in the list (which have already | |
3172 | * been removed from the primary pr_reg list), except the | |
3173 | * new persistent reservation holder, the calling Initiator Port. | |
3174 | */ | |
3175 | if (abort) { | |
3176 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); | |
3177 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3178 | pr_reg_n); | |
3179 | } | |
3180 | ||
3181 | if (pr_tmpl->pr_aptpl_active) { | |
de103c93 | 3182 | if (!core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db | 3183 | &pr_reg_n->pr_aptpl_buf[0], |
de103c93 | 3184 | pr_tmpl->pr_aptpl_buf_len)) { |
6708bb27 | 3185 | pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT" |
de103c93 CH |
3186 | "%s\n", abort ? "_AND_ABORT" : ""); |
3187 | } | |
c66ac9db NB |
3188 | } |
3189 | ||
3190 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3191 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3192 | return 0; |
3193 | } | |
3194 | ||
de103c93 CH |
3195 | static sense_reason_t |
3196 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, | |
3197 | u64 res_key, u64 sa_res_key, int abort) | |
c66ac9db | 3198 | { |
c66ac9db NB |
3199 | switch (type) { |
3200 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3201 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3202 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3203 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3204 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3205 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 CH |
3206 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
3207 | sa_res_key, abort); | |
c66ac9db | 3208 | default: |
6708bb27 | 3209 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
c66ac9db | 3210 | " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); |
de103c93 | 3211 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 3212 | } |
c66ac9db NB |
3213 | } |
3214 | ||
3215 | ||
de103c93 CH |
3216 | static sense_reason_t |
3217 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, | |
3218 | u64 sa_res_key, int aptpl, int unreg) | |
c66ac9db | 3219 | { |
e3d6f909 | 3220 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3221 | struct se_device *dev = cmd->se_dev; |
28168905 | 3222 | struct se_dev_entry *dest_se_deve = NULL; |
e3d6f909 | 3223 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3224 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3225 | struct se_port *se_port; | |
3226 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
3227 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; | |
3228 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; | |
0fd97ccf | 3229 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3230 | unsigned char *buf; |
c66ac9db NB |
3231 | unsigned char *initiator_str; |
3232 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; | |
3233 | u32 tid_len, tmp_tid_len; | |
de103c93 CH |
3234 | int new_reg = 0, type, scope, matching_iname, prf_isid; |
3235 | sense_reason_t ret; | |
c66ac9db NB |
3236 | unsigned short rtpi; |
3237 | unsigned char proto_ident; | |
3238 | ||
6708bb27 AG |
3239 | if (!se_sess || !se_lun) { |
3240 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 3241 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 3242 | } |
de103c93 | 3243 | |
c66ac9db NB |
3244 | memset(dest_iport, 0, 64); |
3245 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
3246 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3247 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3248 | /* |
3249 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3250 | * Register behaviors for a REGISTER AND MOVE service action | |
3251 | * | |
3252 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3253 | */ | |
5951146d | 3254 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3255 | se_sess); |
6708bb27 AG |
3256 | if (!pr_reg) { |
3257 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3258 | " *pr_reg for REGISTER_AND_MOVE\n"); |
de103c93 | 3259 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3260 | } |
3261 | /* | |
3262 | * The provided reservation key much match the existing reservation key | |
3263 | * provided during this initiator's I_T nexus registration. | |
3264 | */ | |
3265 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3266 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3267 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3268 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
3269 | ret = TCM_RESERVATION_CONFLICT; |
3270 | goto out_put_pr_reg; | |
c66ac9db NB |
3271 | } |
3272 | /* | |
3273 | * The service active reservation key needs to be non zero | |
3274 | */ | |
6708bb27 AG |
3275 | if (!sa_res_key) { |
3276 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db | 3277 | " sa_res_key\n"); |
de103c93 CH |
3278 | ret = TCM_INVALID_PARAMETER_LIST; |
3279 | goto out_put_pr_reg; | |
c66ac9db | 3280 | } |
05d1c7c0 | 3281 | |
c66ac9db NB |
3282 | /* |
3283 | * Determine the Relative Target Port Identifier where the reservation | |
3284 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3285 | * information. | |
3286 | */ | |
4949314c | 3287 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3288 | if (!buf) { |
3289 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3290 | goto out_put_pr_reg; | |
3291 | } | |
3292 | ||
c66ac9db NB |
3293 | rtpi = (buf[18] & 0xff) << 8; |
3294 | rtpi |= buf[19] & 0xff; | |
3295 | tid_len = (buf[20] & 0xff) << 24; | |
3296 | tid_len |= (buf[21] & 0xff) << 16; | |
3297 | tid_len |= (buf[22] & 0xff) << 8; | |
3298 | tid_len |= buf[23] & 0xff; | |
4949314c | 3299 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3300 | buf = NULL; |
c66ac9db NB |
3301 | |
3302 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3303 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3304 | " does not equal CDB data_length: %u\n", tid_len, |
3305 | cmd->data_length); | |
de103c93 CH |
3306 | ret = TCM_INVALID_PARAMETER_LIST; |
3307 | goto out_put_pr_reg; | |
c66ac9db NB |
3308 | } |
3309 | ||
3310 | spin_lock(&dev->se_port_lock); | |
3311 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3312 | if (se_port->sep_rtpi != rtpi) | |
3313 | continue; | |
3314 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3315 | if (!dest_se_tpg) |
c66ac9db | 3316 | continue; |
e3d6f909 | 3317 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3318 | if (!dest_tf_ops) |
c66ac9db NB |
3319 | continue; |
3320 | ||
3321 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); | |
3322 | smp_mb__after_atomic_inc(); | |
3323 | spin_unlock(&dev->se_port_lock); | |
3324 | ||
de103c93 | 3325 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
6708bb27 | 3326 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db NB |
3327 | " for dest_se_tpg\n"); |
3328 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); | |
3329 | smp_mb__after_atomic_dec(); | |
de103c93 CH |
3330 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3331 | goto out_put_pr_reg; | |
c66ac9db NB |
3332 | } |
3333 | ||
3334 | spin_lock(&dev->se_port_lock); | |
3335 | break; | |
3336 | } | |
3337 | spin_unlock(&dev->se_port_lock); | |
3338 | ||
6708bb27 AG |
3339 | if (!dest_se_tpg || !dest_tf_ops) { |
3340 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3341 | " fabric ops from Relative Target Port Identifier:" |
3342 | " %hu\n", rtpi); | |
de103c93 CH |
3343 | ret = TCM_INVALID_PARAMETER_LIST; |
3344 | goto out_put_pr_reg; | |
c66ac9db | 3345 | } |
05d1c7c0 | 3346 | |
4949314c | 3347 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3348 | if (!buf) { |
3349 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3350 | goto out_put_pr_reg; | |
3351 | } | |
c66ac9db | 3352 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3353 | |
6708bb27 | 3354 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3355 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3356 | |
c66ac9db | 3357 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { |
6708bb27 | 3358 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3359 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3360 | " from fabric: %s\n", proto_ident, | |
3361 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), | |
3362 | dest_tf_ops->get_fabric_name()); | |
de103c93 | 3363 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3364 | goto out; |
3365 | } | |
3366 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { | |
6708bb27 | 3367 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" |
c66ac9db NB |
3368 | " containg a valid tpg_parse_pr_out_transport_id" |
3369 | " function pointer\n"); | |
de103c93 | 3370 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3371 | goto out; |
3372 | } | |
3373 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, | |
3374 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); | |
6708bb27 AG |
3375 | if (!initiator_str) { |
3376 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3377 | " initiator_str from Transport ID\n"); |
de103c93 | 3378 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3379 | goto out; |
3380 | } | |
3381 | ||
4949314c | 3382 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3383 | buf = NULL; |
3384 | ||
6708bb27 | 3385 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3386 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3387 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3388 | iport_ptr : ""); | |
3389 | /* | |
3390 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3391 | * action specifies a TransportID that is the same as the initiator port | |
3392 | * of the I_T nexus for the command received, then the command shall | |
3393 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3394 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3395 | * IN PARAMETER LIST. | |
3396 | */ | |
3397 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3398 | matching_iname = (!strcmp(initiator_str, | |
3399 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3400 | if (!matching_iname) |
c66ac9db NB |
3401 | goto after_iport_check; |
3402 | ||
6708bb27 AG |
3403 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3404 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3405 | " matches: %s on received I_T Nexus\n", initiator_str, |
3406 | pr_reg_nacl->initiatorname); | |
de103c93 | 3407 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3408 | goto out; |
3409 | } | |
6708bb27 AG |
3410 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3411 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3412 | " matches: %s %s on received I_T Nexus\n", |
3413 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3414 | pr_reg->pr_reg_isid); | |
de103c93 | 3415 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3416 | goto out; |
3417 | } | |
3418 | after_iport_check: | |
3419 | /* | |
3420 | * Locate the destination struct se_node_acl from the received Transport ID | |
3421 | */ | |
28638887 | 3422 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db NB |
3423 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3424 | initiator_str); | |
3425 | if (dest_node_acl) { | |
3426 | atomic_inc(&dest_node_acl->acl_pr_ref_count); | |
3427 | smp_mb__after_atomic_inc(); | |
3428 | } | |
28638887 | 3429 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db | 3430 | |
6708bb27 AG |
3431 | if (!dest_node_acl) { |
3432 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3433 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3434 | initiator_str); | |
de103c93 | 3435 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3436 | goto out; |
3437 | } | |
de103c93 CH |
3438 | |
3439 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { | |
6708bb27 | 3440 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db NB |
3441 | " dest_node_acl\n"); |
3442 | atomic_dec(&dest_node_acl->acl_pr_ref_count); | |
3443 | smp_mb__after_atomic_dec(); | |
3444 | dest_node_acl = NULL; | |
de103c93 | 3445 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3446 | goto out; |
3447 | } | |
8b1e1244 | 3448 | |
6708bb27 | 3449 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3450 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3451 | dest_node_acl->initiatorname); | |
8b1e1244 | 3452 | |
c66ac9db NB |
3453 | /* |
3454 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3455 | * PORT IDENTIFIER. | |
3456 | */ | |
3457 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3458 | if (!dest_se_deve) { |
3459 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3460 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
de103c93 | 3461 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3462 | goto out; |
3463 | } | |
3464 | ||
de103c93 | 3465 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 3466 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
c66ac9db NB |
3467 | atomic_dec(&dest_se_deve->pr_ref_count); |
3468 | smp_mb__after_atomic_dec(); | |
3469 | dest_se_deve = NULL; | |
de103c93 | 3470 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3471 | goto out; |
3472 | } | |
8b1e1244 | 3473 | |
6708bb27 | 3474 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3475 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3476 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3477 | dest_se_deve->mapped_lun); | |
8b1e1244 | 3478 | |
c66ac9db NB |
3479 | /* |
3480 | * A persistent reservation needs to already existing in order to | |
3481 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3482 | */ | |
3483 | spin_lock(&dev->dev_reservation_lock); | |
3484 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3485 | if (!pr_res_holder) { |
3486 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3487 | " currently held\n"); |
3488 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3489 | ret = TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3490 | goto out; |
3491 | } | |
3492 | /* | |
3493 | * The received on I_T Nexus must be the reservation holder. | |
3494 | * | |
3495 | * From spc4r17 section 5.7.8 Table 50 -- | |
3496 | * Register behaviors for a REGISTER AND MOVE service action | |
3497 | */ | |
3498 | if (pr_res_holder != pr_reg) { | |
6708bb27 | 3499 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3500 | " Nexus is not reservation holder\n"); |
3501 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3502 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3503 | goto out; |
3504 | } | |
3505 | /* | |
3506 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3507 | * | |
3508 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3509 | * action is received and the established persistent reservation is a | |
3510 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3511 | * All Registrants type reservation, then the command shall be completed | |
3512 | * with RESERVATION CONFLICT status. | |
3513 | */ | |
3514 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3515 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3516 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3517 | " reservation for type: %s\n", |
3518 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3519 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3520 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3521 | goto out; |
3522 | } | |
3523 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3524 | /* | |
3525 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3526 | */ | |
3527 | type = pr_res_holder->pr_res_type; | |
3528 | scope = pr_res_holder->pr_res_type; | |
3529 | /* | |
3530 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3531 | * RESERVATION KEY field with the I_T nexus specified as the | |
3532 | * destination of the register and move, where: | |
3533 | * A) The I_T nexus is specified by the TransportID and the | |
3534 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3535 | * B) Regardless of the TransportID format used, the association for | |
3536 | * the initiator port is based on either the initiator port name | |
3537 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3538 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3539 | * transport protocols where port names are not required; | |
3540 | * d) Register the reservation key specified in the SERVICE ACTION | |
3541 | * RESERVATION KEY field; | |
3542 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3543 | * RESERVATION KEY field and associated information; | |
3544 | * | |
3545 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3546 | * register an I_T nexus that is already registered with the same | |
3547 | * reservation key or a different reservation key. | |
3548 | */ | |
3549 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3550 | iport_ptr); | |
6708bb27 | 3551 | if (!dest_pr_reg) { |
de103c93 | 3552 | if (core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db | 3553 | dest_node_acl, dest_se_deve, iport_ptr, |
de103c93 | 3554 | sa_res_key, 0, aptpl, 2, 1)) { |
c66ac9db | 3555 | spin_unlock(&dev->dev_reservation_lock); |
de103c93 | 3556 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3557 | goto out; |
3558 | } | |
3559 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3560 | iport_ptr); | |
3561 | new_reg = 1; | |
3562 | } | |
3563 | /* | |
3564 | * f) Release the persistent reservation for the persistent reservation | |
3565 | * holder (i.e., the I_T nexus on which the | |
3566 | */ | |
3567 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
3568 | dev->dev_pr_res_holder, 0); | |
3569 | /* | |
3570 | * g) Move the persistent reservation to the specified I_T nexus using | |
3571 | * the same scope and type as the persistent reservation released in | |
3572 | * item f); and | |
3573 | */ | |
3574 | dev->dev_pr_res_holder = dest_pr_reg; | |
3575 | dest_pr_reg->pr_res_holder = 1; | |
3576 | dest_pr_reg->pr_res_type = type; | |
3577 | pr_reg->pr_res_scope = scope; | |
3578 | prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], | |
3579 | PR_REG_ISID_ID_LEN); | |
3580 | /* | |
3581 | * Increment PRGeneration for existing registrations.. | |
3582 | */ | |
6708bb27 | 3583 | if (!new_reg) |
c66ac9db NB |
3584 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3585 | spin_unlock(&dev->dev_reservation_lock); | |
3586 | ||
6708bb27 | 3587 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3588 | " created new reservation holder TYPE: %s on object RTPI:" |
3589 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3590 | core_scsi3_pr_dump_type(type), rtpi, | |
3591 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3592 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3593 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3594 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
3595 | (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), | |
3596 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? | |
3597 | iport_ptr : ""); | |
3598 | /* | |
3599 | * It is now safe to release configfs group dependencies for destination | |
3600 | * of Transport ID Initiator Device/Port Identifier | |
3601 | */ | |
3602 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3603 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3604 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3605 | /* | |
3606 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3607 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3608 | */ | |
3609 | if (unreg) { | |
3610 | spin_lock(&pr_tmpl->registration_lock); | |
3611 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3612 | spin_unlock(&pr_tmpl->registration_lock); | |
3613 | } else | |
3614 | core_scsi3_put_pr_reg(pr_reg); | |
3615 | ||
3616 | /* | |
3617 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
3618 | * write out the updated metadata to struct file for this SCSI device. | |
3619 | */ | |
6708bb27 | 3620 | if (!aptpl) { |
c66ac9db | 3621 | pr_tmpl->pr_aptpl_active = 0; |
5951146d | 3622 | core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); |
6708bb27 | 3623 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for" |
c66ac9db NB |
3624 | " REGISTER_AND_MOVE\n"); |
3625 | } else { | |
3626 | pr_tmpl->pr_aptpl_active = 1; | |
de103c93 | 3627 | if (!core_scsi3_update_and_write_aptpl(cmd->se_dev, |
c66ac9db | 3628 | &dest_pr_reg->pr_aptpl_buf[0], |
de103c93 | 3629 | pr_tmpl->pr_aptpl_buf_len)) { |
6708bb27 | 3630 | pr_debug("SPC-3 PR: Set APTPL Bit Activated for" |
c66ac9db | 3631 | " REGISTER_AND_MOVE\n"); |
de103c93 | 3632 | } |
c66ac9db NB |
3633 | } |
3634 | ||
4949314c | 3635 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3636 | |
c66ac9db NB |
3637 | core_scsi3_put_pr_reg(dest_pr_reg); |
3638 | return 0; | |
3639 | out: | |
05d1c7c0 | 3640 | if (buf) |
4949314c | 3641 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3642 | if (dest_se_deve) |
3643 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3644 | if (dest_node_acl) | |
3645 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3646 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
de103c93 CH |
3647 | |
3648 | out_put_pr_reg: | |
c66ac9db NB |
3649 | core_scsi3_put_pr_reg(pr_reg); |
3650 | return ret; | |
3651 | } | |
3652 | ||
3653 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3654 | { | |
3655 | unsigned int __v1, __v2; | |
3656 | ||
3657 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3658 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3659 | ||
3660 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3661 | } | |
3662 | ||
3663 | /* | |
3664 | * See spc4r17 section 6.14 Table 170 | |
3665 | */ | |
de103c93 CH |
3666 | sense_reason_t |
3667 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) | |
c66ac9db | 3668 | { |
617c0e06 | 3669 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3670 | unsigned char *buf; |
c66ac9db NB |
3671 | u64 res_key, sa_res_key; |
3672 | int sa, scope, type, aptpl; | |
3673 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
de103c93 | 3674 | sense_reason_t ret; |
617c0e06 CH |
3675 | |
3676 | /* | |
3677 | * Following spc2r20 5.5.1 Reservations overview: | |
3678 | * | |
3679 | * If a logical unit has been reserved by any RESERVE command and is | |
3680 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3681 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3682 | * initiator or service action and shall terminate with a RESERVATION | |
3683 | * CONFLICT status. | |
3684 | */ | |
0fd97ccf | 3685 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
617c0e06 CH |
3686 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
3687 | " SPC-2 reservation is held, returning" | |
3688 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 3689 | return TCM_RESERVATION_CONFLICT; |
617c0e06 CH |
3690 | } |
3691 | ||
c66ac9db NB |
3692 | /* |
3693 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3694 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3695 | */ | |
de103c93 CH |
3696 | if (!cmd->se_sess) |
3697 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db NB |
3698 | |
3699 | if (cmd->data_length < 24) { | |
6708bb27 | 3700 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3701 | " length too small: %u\n", cmd->data_length); |
de103c93 | 3702 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3703 | } |
de103c93 | 3704 | |
c66ac9db NB |
3705 | /* |
3706 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3707 | */ | |
3708 | sa = (cdb[1] & 0x1f); | |
3709 | scope = (cdb[2] & 0xf0); | |
3710 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3711 | |
4949314c | 3712 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3713 | if (!buf) |
3714 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3715 | ||
c66ac9db NB |
3716 | /* |
3717 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3718 | */ | |
3719 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3720 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3721 | /* | |
3722 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3723 | * SCSI TransportIDs. | |
3724 | */ | |
3725 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3726 | spec_i_pt = (buf[20] & 0x08); | |
3727 | all_tg_pt = (buf[20] & 0x04); | |
3728 | aptpl = (buf[20] & 0x01); | |
3729 | } else { | |
3730 | aptpl = (buf[17] & 0x01); | |
3731 | unreg = (buf[17] & 0x02); | |
3732 | } | |
4949314c | 3733 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3734 | buf = NULL; |
3735 | ||
c66ac9db NB |
3736 | /* |
3737 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3738 | */ | |
de103c93 CH |
3739 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) |
3740 | return TCM_INVALID_PARAMETER_LIST; | |
d29a5b6a | 3741 | |
c66ac9db NB |
3742 | /* |
3743 | * From spc4r17 section 6.14: | |
3744 | * | |
3745 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3746 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3747 | * the command shall be terminated with CHECK CONDITION status, with | |
3748 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3749 | * code set to PARAMETER LIST LENGTH ERROR. | |
3750 | */ | |
6708bb27 | 3751 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3752 | (cmd->data_length != 24)) { |
6708bb27 | 3753 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3754 | " list length: %u\n", cmd->data_length); |
de103c93 | 3755 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3756 | } |
de103c93 | 3757 | |
c66ac9db NB |
3758 | /* |
3759 | * (core_scsi3_emulate_pro_* function parameters | |
3760 | * are defined by spc4r17 Table 174: | |
3761 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3762 | */ | |
3763 | switch (sa) { | |
3764 | case PRO_REGISTER: | |
d29a5b6a | 3765 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3766 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); |
d29a5b6a | 3767 | break; |
c66ac9db | 3768 | case PRO_RESERVE: |
d29a5b6a CH |
3769 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3770 | break; | |
c66ac9db | 3771 | case PRO_RELEASE: |
d29a5b6a CH |
3772 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3773 | break; | |
c66ac9db | 3774 | case PRO_CLEAR: |
d29a5b6a CH |
3775 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3776 | break; | |
c66ac9db | 3777 | case PRO_PREEMPT: |
d29a5b6a | 3778 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3779 | res_key, sa_res_key, 0); |
d29a5b6a | 3780 | break; |
c66ac9db | 3781 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3782 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
c66ac9db | 3783 | res_key, sa_res_key, 1); |
d29a5b6a | 3784 | break; |
c66ac9db | 3785 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3786 | ret = core_scsi3_emulate_pro_register(cmd, |
c66ac9db | 3787 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); |
d29a5b6a | 3788 | break; |
c66ac9db | 3789 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3790 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3791 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3792 | break; |
c66ac9db | 3793 | default: |
6708bb27 | 3794 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3795 | " action: 0x%02x\n", cdb[1] & 0x1f); |
de103c93 | 3796 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3797 | } |
3798 | ||
6bb35e00 CH |
3799 | if (!ret) |
3800 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3801 | return ret; |
c66ac9db NB |
3802 | } |
3803 | ||
3804 | /* | |
3805 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3806 | * | |
3807 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3808 | */ | |
de103c93 CH |
3809 | static sense_reason_t |
3810 | core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
c66ac9db | 3811 | { |
0fd97ccf | 3812 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3813 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3814 | unsigned char *buf; |
c66ac9db NB |
3815 | u32 add_len = 0, off = 8; |
3816 | ||
3817 | if (cmd->data_length < 8) { | |
6708bb27 | 3818 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3819 | " too small\n", cmd->data_length); |
de103c93 | 3820 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3821 | } |
3822 | ||
4949314c | 3823 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3824 | if (!buf) |
3825 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3826 | ||
0fd97ccf CH |
3827 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3828 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3829 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3830 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3831 | |
0fd97ccf CH |
3832 | spin_lock(&dev->t10_pr.registration_lock); |
3833 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
3834 | pr_reg_list) { |
3835 | /* | |
3836 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3837 | * next reservation key list descriptor. | |
3838 | */ | |
3839 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3840 | break; | |
3841 | ||
3842 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3843 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3844 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3845 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3846 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3847 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3848 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3849 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3850 | ||
3851 | add_len += 8; | |
3852 | } | |
0fd97ccf | 3853 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db NB |
3854 | |
3855 | buf[4] = ((add_len >> 24) & 0xff); | |
3856 | buf[5] = ((add_len >> 16) & 0xff); | |
3857 | buf[6] = ((add_len >> 8) & 0xff); | |
3858 | buf[7] = (add_len & 0xff); | |
3859 | ||
4949314c | 3860 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3861 | |
c66ac9db NB |
3862 | return 0; |
3863 | } | |
3864 | ||
3865 | /* | |
3866 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3867 | * | |
3868 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3869 | */ | |
de103c93 CH |
3870 | static sense_reason_t |
3871 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
c66ac9db | 3872 | { |
0fd97ccf | 3873 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3874 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3875 | unsigned char *buf; |
c66ac9db NB |
3876 | u64 pr_res_key; |
3877 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
3878 | ||
3879 | if (cmd->data_length < 8) { | |
6708bb27 | 3880 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 3881 | " too small\n", cmd->data_length); |
de103c93 | 3882 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3883 | } |
3884 | ||
4949314c | 3885 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3886 | if (!buf) |
3887 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3888 | ||
0fd97ccf CH |
3889 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3890 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3891 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3892 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3893 | |
0fd97ccf CH |
3894 | spin_lock(&dev->dev_reservation_lock); |
3895 | pr_reg = dev->dev_pr_res_holder; | |
ee1b1b9c | 3896 | if (pr_reg) { |
c66ac9db NB |
3897 | /* |
3898 | * Set the hardcoded Additional Length | |
3899 | */ | |
3900 | buf[4] = ((add_len >> 24) & 0xff); | |
3901 | buf[5] = ((add_len >> 16) & 0xff); | |
3902 | buf[6] = ((add_len >> 8) & 0xff); | |
3903 | buf[7] = (add_len & 0xff); | |
3904 | ||
05d1c7c0 AG |
3905 | if (cmd->data_length < 22) |
3906 | goto err; | |
3907 | ||
c66ac9db NB |
3908 | /* |
3909 | * Set the Reservation key. | |
3910 | * | |
3911 | * From spc4r17, section 5.7.10: | |
3912 | * A persistent reservation holder has its reservation key | |
3913 | * returned in the parameter data from a PERSISTENT | |
3914 | * RESERVE IN command with READ RESERVATION service action as | |
3915 | * follows: | |
3916 | * a) For a persistent reservation of the type Write Exclusive | |
3917 | * - All Registrants or Exclusive Access  All Regitrants, | |
3918 | * the reservation key shall be set to zero; or | |
3919 | * b) For all other persistent reservation types, the | |
3920 | * reservation key shall be set to the registered | |
3921 | * reservation key for the I_T nexus that holds the | |
3922 | * persistent reservation. | |
3923 | */ | |
3924 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3925 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3926 | pr_res_key = 0; | |
3927 | else | |
3928 | pr_res_key = pr_reg->pr_res_key; | |
3929 | ||
3930 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
3931 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
3932 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
3933 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
3934 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
3935 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
3936 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
3937 | buf[15] = (pr_res_key & 0xff); | |
3938 | /* | |
3939 | * Set the SCOPE and TYPE | |
3940 | */ | |
3941 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3942 | (pr_reg->pr_res_type & 0x0f); | |
3943 | } | |
05d1c7c0 AG |
3944 | |
3945 | err: | |
0fd97ccf | 3946 | spin_unlock(&dev->dev_reservation_lock); |
4949314c | 3947 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3948 | |
3949 | return 0; | |
3950 | } | |
3951 | ||
3952 | /* | |
3953 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3954 | * | |
3955 | * See spc4r17 section 6.13.4 Table 165 | |
3956 | */ | |
de103c93 CH |
3957 | static sense_reason_t |
3958 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
c66ac9db | 3959 | { |
5951146d | 3960 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 3961 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3962 | unsigned char *buf; |
c66ac9db NB |
3963 | u16 add_len = 8; /* Hardcoded to 8. */ |
3964 | ||
3965 | if (cmd->data_length < 6) { | |
6708bb27 | 3966 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 3967 | " %u too small\n", cmd->data_length); |
de103c93 | 3968 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3969 | } |
3970 | ||
4949314c | 3971 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3972 | if (!buf) |
3973 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3974 | |
c66ac9db NB |
3975 | buf[0] = ((add_len << 8) & 0xff); |
3976 | buf[1] = (add_len & 0xff); | |
3977 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
3978 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3979 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3980 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3981 | /* | |
3982 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3983 | * set the TMV: Task Mask Valid bit. | |
3984 | */ | |
3985 | buf[3] |= 0x80; | |
3986 | /* | |
3987 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3988 | */ | |
3989 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3990 | /* | |
3991 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3992 | */ | |
3993 | if (pr_tmpl->pr_aptpl_active) | |
3994 | buf[3] |= 0x01; | |
3995 | /* | |
3996 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3997 | */ | |
3998 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3999 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
4000 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
4001 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
4002 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
4003 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
4004 | ||
4949314c | 4005 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4006 | |
c66ac9db NB |
4007 | return 0; |
4008 | } | |
4009 | ||
4010 | /* | |
4011 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
4012 | * | |
4013 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
4014 | */ | |
de103c93 CH |
4015 | static sense_reason_t |
4016 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
c66ac9db | 4017 | { |
0fd97ccf | 4018 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 4019 | struct se_node_acl *se_nacl; |
c66ac9db NB |
4020 | struct se_portal_group *se_tpg; |
4021 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 4022 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 4023 | unsigned char *buf; |
c66ac9db NB |
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) { | |
6708bb27 | 4029 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 4030 | " too small\n", cmd->data_length); |
de103c93 | 4031 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
4032 | } |
4033 | ||
4949314c | 4034 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
4035 | if (!buf) |
4036 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 4037 | |
0fd97ccf CH |
4038 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
4039 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
4040 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
4041 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db NB |
4042 | |
4043 | spin_lock(&pr_tmpl->registration_lock); | |
4044 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
4045 | &pr_tmpl->registration_list, pr_reg_list) { | |
4046 | ||
4047 | se_nacl = pr_reg->pr_reg_nacl; | |
4048 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
4049 | add_desc_len = 0; | |
4050 | ||
4051 | atomic_inc(&pr_reg->pr_res_holders); | |
4052 | smp_mb__after_atomic_inc(); | |
4053 | spin_unlock(&pr_tmpl->registration_lock); | |
4054 | /* | |
4055 | * Determine expected length of $FABRIC_MOD specific | |
4056 | * TransportID full status descriptor.. | |
4057 | */ | |
e3d6f909 | 4058 | exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( |
c66ac9db NB |
4059 | se_tpg, se_nacl, pr_reg, &format_code); |
4060 | ||
4061 | if ((exp_desc_len + add_len) > cmd->data_length) { | |
6708bb27 | 4062 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
4063 | " out of buffer: %d\n", cmd->data_length); |
4064 | spin_lock(&pr_tmpl->registration_lock); | |
4065 | atomic_dec(&pr_reg->pr_res_holders); | |
4066 | smp_mb__after_atomic_dec(); | |
4067 | break; | |
4068 | } | |
4069 | /* | |
4070 | * Set RESERVATION KEY | |
4071 | */ | |
4072 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4073 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4074 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4075 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4076 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4077 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4078 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4079 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4080 | off += 4; /* Skip Over Reserved area */ | |
4081 | ||
4082 | /* | |
4083 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4084 | */ | |
4085 | if (pr_reg->pr_reg_all_tg_pt) | |
4086 | buf[off] = 0x02; | |
4087 | /* | |
4088 | * The struct se_lun pointer will be present for the | |
4089 | * reservation holder for PR_HOLDER bit. | |
4090 | * | |
4091 | * Also, if this registration is the reservation | |
4092 | * holder, fill in SCOPE and TYPE in the next byte. | |
4093 | */ | |
4094 | if (pr_reg->pr_res_holder) { | |
4095 | buf[off++] |= 0x01; | |
4096 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4097 | (pr_reg->pr_res_type & 0x0f); | |
4098 | } else | |
4099 | off += 2; | |
4100 | ||
4101 | off += 4; /* Skip over reserved area */ | |
4102 | /* | |
4103 | * From spc4r17 6.3.15: | |
4104 | * | |
4105 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4106 | * IDENTIFIER field contains the relative port identifier (see | |
4107 | * 3.1.120) of the target port that is part of the I_T nexus | |
4108 | * described by this full status descriptor. If the ALL_TG_PT | |
4109 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4110 | * IDENTIFIER field are not defined by this standard. | |
4111 | */ | |
6708bb27 | 4112 | if (!pr_reg->pr_reg_all_tg_pt) { |
c66ac9db NB |
4113 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
4114 | ||
4115 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
4116 | buf[off++] = (port->sep_rtpi & 0xff); | |
4117 | } else | |
35d1efe8 | 4118 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
c66ac9db NB |
4119 | |
4120 | /* | |
4121 | * Now, have the $FABRIC_MOD fill in the protocol identifier | |
4122 | */ | |
e3d6f909 | 4123 | desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, |
c66ac9db NB |
4124 | se_nacl, pr_reg, &format_code, &buf[off+4]); |
4125 | ||
4126 | spin_lock(&pr_tmpl->registration_lock); | |
4127 | atomic_dec(&pr_reg->pr_res_holders); | |
4128 | smp_mb__after_atomic_dec(); | |
4129 | /* | |
4130 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4131 | */ | |
4132 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4133 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4134 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4135 | buf[off++] = (desc_len & 0xff); | |
4136 | /* | |
4137 | * Size of full desctipor header minus TransportID | |
4138 | * containing $FABRIC_MOD specific) initiator device/port | |
4139 | * WWN information. | |
4140 | * | |
4141 | * See spc4r17 Section 6.13.5 Table 169 | |
4142 | */ | |
4143 | add_desc_len = (24 + desc_len); | |
4144 | ||
4145 | off += desc_len; | |
4146 | add_len += add_desc_len; | |
4147 | } | |
4148 | spin_unlock(&pr_tmpl->registration_lock); | |
4149 | /* | |
4150 | * Set ADDITIONAL_LENGTH | |
4151 | */ | |
4152 | buf[4] = ((add_len >> 24) & 0xff); | |
4153 | buf[5] = ((add_len >> 16) & 0xff); | |
4154 | buf[6] = ((add_len >> 8) & 0xff); | |
4155 | buf[7] = (add_len & 0xff); | |
4156 | ||
4949314c | 4157 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4158 | |
c66ac9db NB |
4159 | return 0; |
4160 | } | |
4161 | ||
de103c93 CH |
4162 | sense_reason_t |
4163 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) | |
c66ac9db | 4164 | { |
de103c93 | 4165 | sense_reason_t ret; |
e76a35d6 | 4166 | |
c66ac9db NB |
4167 | /* |
4168 | * Following spc2r20 5.5.1 Reservations overview: | |
4169 | * | |
4170 | * If a logical unit has been reserved by any RESERVE command and is | |
4171 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4172 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4173 | * initiator or service action and shall terminate with a RESERVATION | |
4174 | * CONFLICT status. | |
4175 | */ | |
0fd97ccf | 4176 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
6708bb27 | 4177 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4178 | " SPC-2 reservation is held, returning" |
4179 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 4180 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
4181 | } |
4182 | ||
617c0e06 CH |
4183 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4184 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4185 | ret = core_scsi3_pri_read_keys(cmd); |
4186 | break; | |
617c0e06 | 4187 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4188 | ret = core_scsi3_pri_read_reservation(cmd); |
4189 | break; | |
617c0e06 | 4190 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4191 | ret = core_scsi3_pri_report_capabilities(cmd); |
4192 | break; | |
617c0e06 | 4193 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4194 | ret = core_scsi3_pri_read_full_status(cmd); |
4195 | break; | |
617c0e06 CH |
4196 | default: |
4197 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4198 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
de103c93 | 4199 | return TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
4200 | } |
4201 | ||
6bb35e00 CH |
4202 | if (!ret) |
4203 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4204 | return ret; |
c66ac9db NB |
4205 | } |
4206 | ||
de103c93 CH |
4207 | sense_reason_t |
4208 | target_check_reservation(struct se_cmd *cmd) | |
c66ac9db | 4209 | { |
d977f437 | 4210 | struct se_device *dev = cmd->se_dev; |
de103c93 | 4211 | sense_reason_t ret; |
c66ac9db | 4212 | |
d977f437 CH |
4213 | if (!cmd->se_sess) |
4214 | return 0; | |
4215 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
4216 | return 0; | |
4217 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) | |
4218 | return 0; | |
c66ac9db | 4219 | |
d977f437 CH |
4220 | spin_lock(&dev->dev_reservation_lock); |
4221 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) | |
4222 | ret = target_scsi2_reservation_check(cmd); | |
4223 | else | |
4224 | ret = target_scsi3_pr_reservation_check(cmd); | |
4225 | spin_unlock(&dev->dev_reservation_lock); | |
0fd97ccf | 4226 | |
d977f437 | 4227 | return ret; |
c66ac9db | 4228 | } |