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 | * | |
4c76251e | 7 | * (c) Copyright 2009-2013 Datera, Inc. |
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> | |
0e9b10a9 | 30 | #include <linux/file.h> |
c66ac9db NB |
31 | #include <scsi/scsi.h> |
32 | #include <scsi/scsi_cmnd.h> | |
33 | #include <asm/unaligned.h> | |
34 | ||
35 | #include <target/target_core_base.h> | |
c4795fb2 CH |
36 | #include <target/target_core_backend.h> |
37 | #include <target/target_core_fabric.h> | |
c66ac9db | 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 { | |
c66ac9db NB |
47 | struct t10_pr_registration *dest_pr_reg; |
48 | struct se_portal_group *dest_tpg; | |
49 | struct se_node_acl *dest_node_acl; | |
79dc9c9e | 50 | struct se_dev_entry *dest_se_deve; |
c66ac9db NB |
51 | struct list_head dest_list; |
52 | }; | |
53 | ||
d2843c17 | 54 | void core_pr_dump_initiator_port( |
c66ac9db NB |
55 | struct t10_pr_registration *pr_reg, |
56 | char *buf, | |
57 | u32 size) | |
58 | { | |
6708bb27 | 59 | if (!pr_reg->isid_present_at_reg) |
d2843c17 | 60 | buf[0] = '\0'; |
c66ac9db | 61 | |
d2843c17 | 62 | snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); |
c66ac9db NB |
63 | } |
64 | ||
33ce6a87 AG |
65 | enum register_type { |
66 | REGISTER, | |
67 | REGISTER_AND_IGNORE_EXISTING_KEY, | |
68 | REGISTER_AND_MOVE, | |
69 | }; | |
70 | ||
71 | enum preempt_type { | |
72 | PREEMPT, | |
73 | PREEMPT_AND_ABORT, | |
74 | }; | |
75 | ||
c66ac9db | 76 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, |
6c3c9baa | 77 | struct t10_pr_registration *, int, int); |
c66ac9db | 78 | |
e673dc92 IT |
79 | static int is_reservation_holder( |
80 | struct t10_pr_registration *pr_res_holder, | |
81 | struct t10_pr_registration *pr_reg) | |
82 | { | |
83 | int pr_res_type; | |
84 | ||
85 | if (pr_res_holder) { | |
86 | pr_res_type = pr_res_holder->pr_res_type; | |
87 | ||
88 | return pr_res_holder == pr_reg || | |
89 | pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
90 | pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; | |
91 | } | |
92 | return 0; | |
93 | } | |
94 | ||
de103c93 CH |
95 | static sense_reason_t |
96 | target_scsi2_reservation_check(struct se_cmd *cmd) | |
c66ac9db | 97 | { |
d977f437 CH |
98 | struct se_device *dev = cmd->se_dev; |
99 | struct se_session *sess = cmd->se_sess; | |
100 | ||
101 | switch (cmd->t_task_cdb[0]) { | |
c66ac9db NB |
102 | case INQUIRY: |
103 | case RELEASE: | |
104 | case RELEASE_10: | |
105 | return 0; | |
106 | default: | |
d977f437 | 107 | break; |
c66ac9db NB |
108 | } |
109 | ||
d977f437 | 110 | if (!dev->dev_reserved_node_acl || !sess) |
c66ac9db NB |
111 | return 0; |
112 | ||
d977f437 | 113 | if (dev->dev_reserved_node_acl != sess->se_node_acl) |
de103c93 | 114 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
115 | |
116 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
117 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) | |
de103c93 | 118 | return TCM_RESERVATION_CONFLICT; |
c66ac9db | 119 | } |
c66ac9db | 120 | |
d977f437 | 121 | return 0; |
c66ac9db NB |
122 | } |
123 | ||
eacac00c CH |
124 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
125 | struct se_node_acl *, struct se_session *); | |
126 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
127 | ||
087a03b3 | 128 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
eacac00c CH |
129 | { |
130 | struct se_session *se_sess = cmd->se_sess; | |
0fd97ccf | 131 | struct se_device *dev = cmd->se_dev; |
eacac00c | 132 | struct t10_pr_registration *pr_reg; |
0fd97ccf | 133 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
eacac00c CH |
134 | int conflict = 0; |
135 | ||
eacac00c CH |
136 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
137 | se_sess); | |
138 | if (pr_reg) { | |
139 | /* | |
140 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
141 | * behavior | |
142 | * | |
143 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
144 | * status, but no reservation shall be established and the | |
145 | * persistent reservation shall not be changed, if the command | |
146 | * is received from a) and b) below. | |
147 | * | |
148 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
149 | * status, but the persistent reservation shall not be released, | |
150 | * if the command is received from a) and b) | |
151 | * | |
152 | * a) An I_T nexus that is a persistent reservation holder; or | |
153 | * b) An I_T nexus that is registered if a registrants only or | |
154 | * all registrants type persistent reservation is present. | |
155 | * | |
156 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
157 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
158 | * as defined in SPC-2. | |
159 | */ | |
160 | if (pr_reg->pr_res_holder) { | |
161 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 162 | return 1; |
eacac00c CH |
163 | } |
164 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
165 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
166 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
167 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
168 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 169 | return 1; |
eacac00c CH |
170 | } |
171 | core_scsi3_put_pr_reg(pr_reg); | |
172 | conflict = 1; | |
173 | } else { | |
174 | /* | |
175 | * Following spc2r20 5.5.1 Reservations overview: | |
176 | * | |
177 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
178 | * command with the REGISTER or the REGISTER AND IGNORE | |
179 | * EXISTING KEY service action and is still registered by any | |
180 | * initiator, all RESERVE commands and all RELEASE commands | |
181 | * regardless of initiator shall conflict and shall terminate | |
182 | * with a RESERVATION CONFLICT status. | |
183 | */ | |
184 | spin_lock(&pr_tmpl->registration_lock); | |
185 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
186 | spin_unlock(&pr_tmpl->registration_lock); | |
187 | } | |
188 | ||
189 | if (conflict) { | |
190 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
191 | " while active SPC-3 registrations exist," | |
192 | " returning RESERVATION_CONFLICT\n"); | |
087a03b3 | 193 | return -EBUSY; |
eacac00c CH |
194 | } |
195 | ||
087a03b3 | 196 | return 0; |
eacac00c CH |
197 | } |
198 | ||
de103c93 CH |
199 | sense_reason_t |
200 | target_scsi2_reservation_release(struct se_cmd *cmd) | |
c66ac9db NB |
201 | { |
202 | struct se_device *dev = cmd->se_dev; | |
203 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 204 | struct se_portal_group *tpg; |
de103c93 | 205 | int rc; |
c66ac9db | 206 | |
609234e3 | 207 | if (!sess || !sess->se_tpg) |
d29a5b6a | 208 | goto out; |
087a03b3 NB |
209 | rc = target_check_scsi2_reservation_conflict(cmd); |
210 | if (rc == 1) | |
d29a5b6a | 211 | goto out; |
de103c93 CH |
212 | if (rc < 0) |
213 | return TCM_RESERVATION_CONFLICT; | |
c66ac9db NB |
214 | |
215 | spin_lock(&dev->dev_reservation_lock); | |
d29a5b6a CH |
216 | if (!dev->dev_reserved_node_acl || !sess) |
217 | goto out_unlock; | |
218 | ||
219 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
220 | goto out_unlock; | |
c66ac9db | 221 | |
edc318d9 BK |
222 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
223 | goto out_unlock; | |
224 | ||
c66ac9db | 225 | dev->dev_reserved_node_acl = NULL; |
0fd97ccf CH |
226 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
227 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
c66ac9db | 228 | dev->dev_res_bin_isid = 0; |
0fd97ccf | 229 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 230 | } |
609234e3 | 231 | tpg = sess->se_tpg; |
6708bb27 | 232 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 | 233 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
29a05dee | 234 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 235 | sess->se_node_acl->initiatorname); |
c66ac9db | 236 | |
d29a5b6a CH |
237 | out_unlock: |
238 | spin_unlock(&dev->dev_reservation_lock); | |
239 | out: | |
de103c93 CH |
240 | target_complete_cmd(cmd, GOOD); |
241 | return 0; | |
c66ac9db NB |
242 | } |
243 | ||
de103c93 CH |
244 | sense_reason_t |
245 | target_scsi2_reservation_reserve(struct se_cmd *cmd) | |
c66ac9db NB |
246 | { |
247 | struct se_device *dev = cmd->se_dev; | |
248 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 249 | struct se_portal_group *tpg; |
de103c93 CH |
250 | sense_reason_t ret = 0; |
251 | int rc; | |
c66ac9db | 252 | |
a1d8b49a AG |
253 | if ((cmd->t_task_cdb[1] & 0x01) && |
254 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 255 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 256 | " ILLEGAL_REQUEST\n"); |
de103c93 | 257 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
c66ac9db NB |
258 | } |
259 | /* | |
260 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
261 | * ops | |
262 | */ | |
609234e3 | 263 | if (!sess || !sess->se_tpg) |
d29a5b6a | 264 | goto out; |
087a03b3 NB |
265 | rc = target_check_scsi2_reservation_conflict(cmd); |
266 | if (rc == 1) | |
d29a5b6a | 267 | goto out; |
c66ac9db | 268 | |
de103c93 CH |
269 | if (rc < 0) |
270 | return TCM_RESERVATION_CONFLICT; | |
271 | ||
609234e3 | 272 | tpg = sess->se_tpg; |
c66ac9db NB |
273 | spin_lock(&dev->dev_reservation_lock); |
274 | if (dev->dev_reserved_node_acl && | |
275 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 276 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 277 | tpg->se_tpg_tfo->get_fabric_name()); |
6708bb27 | 278 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 279 | cmd->se_lun->unpacked_lun, |
c66ac9db | 280 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 281 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 282 | " from %s \n", cmd->se_lun->unpacked_lun, |
29a05dee | 283 | cmd->orig_fe_lun, |
c66ac9db | 284 | sess->se_node_acl->initiatorname); |
de103c93 | 285 | ret = TCM_RESERVATION_CONFLICT; |
d29a5b6a | 286 | goto out_unlock; |
c66ac9db NB |
287 | } |
288 | ||
289 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
0fd97ccf | 290 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; |
c66ac9db NB |
291 | if (sess->sess_bin_isid != 0) { |
292 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
0fd97ccf | 293 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 294 | } |
6708bb27 | 295 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 296 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
29a05dee | 297 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 298 | sess->se_node_acl->initiatorname); |
c66ac9db | 299 | |
d29a5b6a CH |
300 | out_unlock: |
301 | spin_unlock(&dev->dev_reservation_lock); | |
302 | out: | |
6bb35e00 CH |
303 | if (!ret) |
304 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 305 | return ret; |
c66ac9db NB |
306 | } |
307 | ||
c66ac9db NB |
308 | |
309 | /* | |
310 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
311 | * | |
312 | * This function is called by those initiator ports who are *NOT* | |
313 | * the active PR reservation holder when a reservation is present. | |
314 | */ | |
9fcb57f3 CH |
315 | static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, |
316 | bool isid_mismatch) | |
c66ac9db | 317 | { |
d977f437 | 318 | unsigned char *cdb = cmd->t_task_cdb; |
e3d6f909 | 319 | struct se_session *se_sess = cmd->se_sess; |
29a05dee | 320 | struct se_node_acl *nacl = se_sess->se_node_acl; |
9fcb57f3 | 321 | int other_cdb = 0; |
c66ac9db NB |
322 | int registered_nexus = 0, ret = 1; /* Conflict by default */ |
323 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
324 | int we = 0; /* Write Exclusive */ | |
325 | int legacy = 0; /* Act like a legacy device and return | |
326 | * RESERVATION CONFLICT on some CDBs */ | |
c66ac9db | 327 | |
9fcb57f3 CH |
328 | if (isid_mismatch) { |
329 | registered_nexus = 0; | |
330 | } else { | |
331 | struct se_dev_entry *se_deve; | |
332 | ||
333 | rcu_read_lock(); | |
334 | se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); | |
335 | if (se_deve) | |
336 | registered_nexus = test_bit(DEF_PR_REG_ACTIVE, | |
337 | &se_deve->deve_flags); | |
338 | rcu_read_unlock(); | |
339 | } | |
c66ac9db NB |
340 | |
341 | switch (pr_reg_type) { | |
342 | case PR_TYPE_WRITE_EXCLUSIVE: | |
343 | we = 1; | |
344 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
345 | /* | |
346 | * Some commands are only allowed for the persistent reservation | |
347 | * holder. | |
348 | */ | |
c66ac9db NB |
349 | break; |
350 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
351 | we = 1; | |
352 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
353 | /* | |
354 | * Some commands are only allowed for registered I_T Nexuses. | |
355 | */ | |
356 | reg_only = 1; | |
c66ac9db NB |
357 | break; |
358 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
359 | we = 1; | |
360 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
361 | /* | |
362 | * Each registered I_T Nexus is a reservation holder. | |
363 | */ | |
364 | all_reg = 1; | |
c66ac9db NB |
365 | break; |
366 | default: | |
e3d6f909 | 367 | return -EINVAL; |
c66ac9db NB |
368 | } |
369 | /* | |
370 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
371 | */ | |
372 | switch (cdb[0]) { | |
373 | case SECURITY_PROTOCOL_IN: | |
374 | if (registered_nexus) | |
375 | return 0; | |
376 | ret = (we) ? 0 : 1; | |
377 | break; | |
378 | case MODE_SENSE: | |
379 | case MODE_SENSE_10: | |
380 | case READ_ATTRIBUTE: | |
381 | case READ_BUFFER: | |
382 | case RECEIVE_DIAGNOSTIC: | |
383 | if (legacy) { | |
384 | ret = 1; | |
385 | break; | |
386 | } | |
387 | if (registered_nexus) { | |
388 | ret = 0; | |
389 | break; | |
390 | } | |
391 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
392 | break; | |
393 | case PERSISTENT_RESERVE_OUT: | |
394 | /* | |
395 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
396 | * are allowed in the presence of various reservations. | |
397 | * See spc4r17, table 46 | |
398 | */ | |
399 | switch (cdb[1] & 0x1f) { | |
400 | case PRO_CLEAR: | |
401 | case PRO_PREEMPT: | |
402 | case PRO_PREEMPT_AND_ABORT: | |
403 | ret = (registered_nexus) ? 0 : 1; | |
404 | break; | |
405 | case PRO_REGISTER: | |
406 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
407 | ret = 0; | |
408 | break; | |
409 | case PRO_REGISTER_AND_MOVE: | |
410 | case PRO_RESERVE: | |
411 | ret = 1; | |
412 | break; | |
413 | case PRO_RELEASE: | |
414 | ret = (registered_nexus) ? 0 : 1; | |
415 | break; | |
416 | default: | |
6708bb27 | 417 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 418 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 419 | return -EINVAL; |
c66ac9db NB |
420 | } |
421 | break; | |
422 | case RELEASE: | |
423 | case RELEASE_10: | |
eacac00c | 424 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
425 | ret = 0; |
426 | break; | |
427 | case RESERVE: | |
428 | case RESERVE_10: | |
eacac00c | 429 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
430 | ret = 0; |
431 | break; | |
432 | case TEST_UNIT_READY: | |
433 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
434 | break; | |
435 | case MAINTENANCE_IN: | |
436 | switch (cdb[1] & 0x1f) { | |
437 | case MI_MANAGEMENT_PROTOCOL_IN: | |
438 | if (registered_nexus) { | |
439 | ret = 0; | |
440 | break; | |
441 | } | |
442 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
443 | break; | |
444 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
445 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
446 | if (legacy) { | |
447 | ret = 1; | |
448 | break; | |
449 | } | |
450 | if (registered_nexus) { | |
451 | ret = 0; | |
452 | break; | |
453 | } | |
454 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
455 | break; | |
456 | case MI_REPORT_ALIASES: | |
457 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
458 | case MI_REPORT_PRIORITY: | |
459 | case MI_REPORT_TARGET_PGS: | |
460 | case MI_REPORT_TIMESTAMP: | |
461 | ret = 0; /* Allowed */ | |
462 | break; | |
463 | default: | |
6708bb27 | 464 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 465 | (cdb[1] & 0x1f)); |
e3d6f909 | 466 | return -EINVAL; |
c66ac9db NB |
467 | } |
468 | break; | |
469 | case ACCESS_CONTROL_IN: | |
470 | case ACCESS_CONTROL_OUT: | |
471 | case INQUIRY: | |
472 | case LOG_SENSE: | |
85686f69 | 473 | case SERVICE_ACTION_IN_12: |
c66ac9db NB |
474 | case REPORT_LUNS: |
475 | case REQUEST_SENSE: | |
6816966a | 476 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
477 | ret = 0; /*/ Allowed CDBs */ |
478 | break; | |
479 | default: | |
480 | other_cdb = 1; | |
481 | break; | |
482 | } | |
483 | /* | |
25985edc | 484 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
485 | * statement. |
486 | */ | |
6708bb27 | 487 | if (!ret && !other_cdb) { |
125d0119 | 488 | pr_debug("Allowing explicit CDB: 0x%02x for %s" |
c66ac9db NB |
489 | " reservation holder\n", cdb[0], |
490 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 491 | |
c66ac9db NB |
492 | return ret; |
493 | } | |
494 | /* | |
495 | * Check if write exclusive initiator ports *NOT* holding the | |
496 | * WRITE_EXCLUSIVE_* reservation. | |
497 | */ | |
ee1b1b9c | 498 | if (we && !registered_nexus) { |
c66ac9db NB |
499 | if (cmd->data_direction == DMA_TO_DEVICE) { |
500 | /* | |
501 | * Conflict for write exclusive | |
502 | */ | |
6708bb27 | 503 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
504 | " %s CDB: 0x%02x to %s reservation\n", |
505 | transport_dump_cmd_direction(cmd), | |
506 | se_sess->se_node_acl->initiatorname, cdb[0], | |
507 | core_scsi3_pr_dump_type(pr_reg_type)); | |
508 | return 1; | |
509 | } else { | |
510 | /* | |
511 | * Allow non WRITE CDBs for all Write Exclusive | |
512 | * PR TYPEs to pass for registered and | |
513 | * non-registered_nexuxes NOT holding the reservation. | |
514 | * | |
515 | * We only make noise for the unregisterd nexuses, | |
516 | * as we expect registered non-reservation holding | |
517 | * nexuses to issue CDBs. | |
518 | */ | |
8b1e1244 | 519 | |
6708bb27 | 520 | if (!registered_nexus) { |
125d0119 | 521 | pr_debug("Allowing implicit CDB: 0x%02x" |
c66ac9db NB |
522 | " for %s reservation on unregistered" |
523 | " nexus\n", cdb[0], | |
524 | core_scsi3_pr_dump_type(pr_reg_type)); | |
525 | } | |
8b1e1244 | 526 | |
c66ac9db NB |
527 | return 0; |
528 | } | |
529 | } else if ((reg_only) || (all_reg)) { | |
530 | if (registered_nexus) { | |
531 | /* | |
532 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
533 | * allow commands from registered nexuses. | |
534 | */ | |
8b1e1244 | 535 | |
125d0119 | 536 | pr_debug("Allowing implicit CDB: 0x%02x for %s" |
c66ac9db NB |
537 | " reservation\n", cdb[0], |
538 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 539 | |
c66ac9db NB |
540 | return 0; |
541 | } | |
1ecc7586 LD |
542 | } else if (we && registered_nexus) { |
543 | /* | |
544 | * Reads are allowed for Write Exclusive locks | |
545 | * from all registrants. | |
546 | */ | |
547 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
548 | pr_debug("Allowing READ CDB: 0x%02x for %s" | |
549 | " reservation\n", cdb[0], | |
550 | core_scsi3_pr_dump_type(pr_reg_type)); | |
551 | ||
552 | return 0; | |
553 | } | |
c66ac9db | 554 | } |
6708bb27 | 555 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
556 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
557 | (registered_nexus) ? "" : "un", | |
558 | se_sess->se_node_acl->initiatorname, cdb[0], | |
559 | core_scsi3_pr_dump_type(pr_reg_type)); | |
560 | ||
561 | return 1; /* Conflict by default */ | |
562 | } | |
563 | ||
de103c93 CH |
564 | static sense_reason_t |
565 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) | |
d977f437 CH |
566 | { |
567 | struct se_device *dev = cmd->se_dev; | |
568 | struct se_session *sess = cmd->se_sess; | |
569 | u32 pr_reg_type; | |
9fcb57f3 | 570 | bool isid_mismatch = false; |
d977f437 CH |
571 | |
572 | if (!dev->dev_pr_res_holder) | |
573 | return 0; | |
574 | ||
575 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
576 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
577 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) | |
578 | goto check_nonholder; | |
579 | ||
580 | if (dev->dev_pr_res_holder->isid_present_at_reg) { | |
581 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != | |
582 | sess->sess_bin_isid) { | |
9fcb57f3 | 583 | isid_mismatch = true; |
d977f437 CH |
584 | goto check_nonholder; |
585 | } | |
586 | } | |
587 | ||
588 | return 0; | |
589 | ||
590 | check_nonholder: | |
9fcb57f3 | 591 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) |
de103c93 | 592 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
593 | return 0; |
594 | } | |
595 | ||
c66ac9db NB |
596 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
597 | { | |
c66ac9db | 598 | u32 prg; |
0fd97ccf | 599 | |
c66ac9db NB |
600 | /* |
601 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
602 | * counter mainted by the device server. | |
603 | * | |
604 | * Note that this is done regardless of Active Persist across | |
605 | * Target PowerLoss (APTPL) | |
606 | * | |
607 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
608 | */ | |
609 | spin_lock(&dev->dev_reservation_lock); | |
0fd97ccf | 610 | prg = dev->t10_pr.pr_generation++; |
c66ac9db NB |
611 | spin_unlock(&dev->dev_reservation_lock); |
612 | ||
613 | return prg; | |
614 | } | |
615 | ||
c66ac9db NB |
616 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
617 | struct se_device *dev, | |
618 | struct se_node_acl *nacl, | |
79dc9c9e | 619 | struct se_lun *lun, |
c66ac9db | 620 | struct se_dev_entry *deve, |
79dc9c9e | 621 | u32 mapped_lun, |
c66ac9db NB |
622 | unsigned char *isid, |
623 | u64 sa_res_key, | |
624 | int all_tg_pt, | |
625 | int aptpl) | |
626 | { | |
c66ac9db NB |
627 | struct t10_pr_registration *pr_reg; |
628 | ||
629 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
630 | if (!pr_reg) { |
631 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
632 | return NULL; |
633 | } | |
634 | ||
c66ac9db NB |
635 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); |
636 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
637 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
638 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
639 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
640 | atomic_set(&pr_reg->pr_res_holders, 0); | |
641 | pr_reg->pr_reg_nacl = nacl; | |
642 | pr_reg->pr_reg_deve = deve; | |
79dc9c9e NB |
643 | pr_reg->pr_res_mapped_lun = mapped_lun; |
644 | pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; | |
645 | pr_reg->tg_pt_sep_rtpi = lun->lun_sep->sep_rtpi; | |
c66ac9db NB |
646 | pr_reg->pr_res_key = sa_res_key; |
647 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
648 | pr_reg->pr_reg_aptpl = aptpl; | |
c66ac9db NB |
649 | /* |
650 | * If an ISID value for this SCSI Initiator Port exists, | |
651 | * save it to the registration now. | |
652 | */ | |
653 | if (isid != NULL) { | |
654 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
655 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
656 | pr_reg->isid_present_at_reg = 1; | |
657 | } | |
658 | ||
659 | return pr_reg; | |
660 | } | |
661 | ||
662 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
663 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
664 | ||
665 | /* | |
666 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
667 | * modes. | |
668 | */ | |
669 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
670 | struct se_device *dev, | |
671 | struct se_node_acl *nacl, | |
79dc9c9e | 672 | struct se_lun *lun, |
c66ac9db | 673 | struct se_dev_entry *deve, |
79dc9c9e | 674 | u32 mapped_lun, |
c66ac9db NB |
675 | unsigned char *isid, |
676 | u64 sa_res_key, | |
677 | int all_tg_pt, | |
678 | int aptpl) | |
679 | { | |
680 | struct se_dev_entry *deve_tmp; | |
681 | struct se_node_acl *nacl_tmp; | |
79dc9c9e NB |
682 | struct se_lun_acl *lacl_tmp; |
683 | struct se_lun *lun_tmp; | |
c66ac9db | 684 | struct se_port *port, *port_tmp; |
9ac8928e | 685 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db NB |
686 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; |
687 | int ret; | |
688 | /* | |
689 | * Create a registration for the I_T Nexus upon which the | |
690 | * PROUT REGISTER was received. | |
691 | */ | |
79dc9c9e NB |
692 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
693 | isid, sa_res_key, all_tg_pt, | |
694 | aptpl); | |
6708bb27 | 695 | if (!pr_reg) |
c66ac9db NB |
696 | return NULL; |
697 | /* | |
698 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
699 | */ | |
6708bb27 | 700 | if (!all_tg_pt) |
c66ac9db NB |
701 | return pr_reg; |
702 | /* | |
703 | * Create list of matching SCSI Initiator Port registrations | |
704 | * for ALL_TG_PT=1 | |
705 | */ | |
706 | spin_lock(&dev->se_port_lock); | |
707 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
33940d09 | 708 | atomic_inc_mb(&port->sep_tg_pt_ref_cnt); |
c66ac9db NB |
709 | spin_unlock(&dev->se_port_lock); |
710 | ||
711 | spin_lock_bh(&port->sep_alua_lock); | |
712 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
713 | alua_port_list) { | |
714 | /* | |
715 | * This pointer will be NULL for demo mode MappedLUNs | |
125d0119 | 716 | * that have not been make explicit via a ConfigFS |
c66ac9db NB |
717 | * MappedLUN group for the SCSI Initiator Node ACL. |
718 | */ | |
6708bb27 | 719 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
720 | continue; |
721 | ||
79dc9c9e NB |
722 | lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, |
723 | lockdep_is_held(&port->sep_alua_lock)); | |
724 | nacl_tmp = lacl_tmp->se_lun_nacl; | |
c66ac9db NB |
725 | /* |
726 | * Skip the matching struct se_node_acl that is allocated | |
727 | * above.. | |
728 | */ | |
729 | if (nacl == nacl_tmp) | |
730 | continue; | |
731 | /* | |
732 | * Only perform PR registrations for target ports on | |
733 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
734 | * arrived. | |
735 | */ | |
736 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
737 | continue; | |
738 | /* | |
739 | * Look for a matching Initiator Node ACL in ASCII format | |
740 | */ | |
741 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
742 | continue; | |
743 | ||
29a05dee | 744 | kref_get(&deve_tmp->pr_kref); |
c66ac9db NB |
745 | spin_unlock_bh(&port->sep_alua_lock); |
746 | /* | |
747 | * Grab a configfs group dependency that is released | |
748 | * for the exception path at label out: below, or upon | |
749 | * completion of adding ALL_TG_PT=1 registrations in | |
750 | * __core_scsi3_add_registration() | |
751 | */ | |
752 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
753 | if (ret < 0) { | |
6708bb27 | 754 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db | 755 | "_item() failed\n"); |
33940d09 | 756 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
29a05dee | 757 | kref_put(&deve_tmp->pr_kref, target_pr_kref_release); |
c66ac9db NB |
758 | goto out; |
759 | } | |
760 | /* | |
761 | * Located a matching SCSI Initiator Port on a different | |
762 | * port, allocate the pr_reg_atp and attach it to the | |
763 | * pr_reg->pr_reg_atp_list that will be processed once | |
764 | * the original *pr_reg is processed in | |
765 | * __core_scsi3_add_registration() | |
766 | */ | |
79dc9c9e NB |
767 | lun_tmp = rcu_dereference_check(deve_tmp->se_lun, |
768 | atomic_read(&deve_tmp->pr_kref.refcount) != 0); | |
769 | ||
c66ac9db | 770 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, |
79dc9c9e NB |
771 | nacl_tmp, lun_tmp, deve_tmp, |
772 | deve_tmp->mapped_lun, NULL, | |
c66ac9db | 773 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 774 | if (!pr_reg_atp) { |
33940d09 | 775 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
c66ac9db NB |
776 | core_scsi3_lunacl_undepend_item(deve_tmp); |
777 | goto out; | |
778 | } | |
779 | ||
780 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
781 | &pr_reg->pr_reg_atp_list); | |
782 | spin_lock_bh(&port->sep_alua_lock); | |
783 | } | |
784 | spin_unlock_bh(&port->sep_alua_lock); | |
785 | ||
786 | spin_lock(&dev->se_port_lock); | |
33940d09 | 787 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
c66ac9db NB |
788 | } |
789 | spin_unlock(&dev->se_port_lock); | |
790 | ||
791 | return pr_reg; | |
792 | out: | |
793 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
794 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
795 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
796 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
797 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
798 | } | |
799 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
800 | return NULL; | |
801 | } | |
802 | ||
803 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 804 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
805 | u64 sa_res_key, |
806 | unsigned char *i_port, | |
807 | unsigned char *isid, | |
808 | u32 mapped_lun, | |
809 | unsigned char *t_port, | |
810 | u16 tpgt, | |
811 | u32 target_lun, | |
812 | int res_holder, | |
813 | int all_tg_pt, | |
814 | u8 type) | |
815 | { | |
816 | struct t10_pr_registration *pr_reg; | |
817 | ||
6708bb27 AG |
818 | if (!i_port || !t_port || !sa_res_key) { |
819 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 820 | return -EINVAL; |
c66ac9db NB |
821 | } |
822 | ||
823 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
824 | if (!pr_reg) { |
825 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 826 | return -ENOMEM; |
c66ac9db | 827 | } |
c66ac9db NB |
828 | |
829 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
830 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
831 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
832 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
833 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
834 | atomic_set(&pr_reg->pr_res_holders, 0); | |
835 | pr_reg->pr_reg_nacl = NULL; | |
836 | pr_reg->pr_reg_deve = NULL; | |
837 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
838 | pr_reg->pr_aptpl_target_lun = target_lun; | |
839 | pr_reg->pr_res_key = sa_res_key; | |
840 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
841 | pr_reg->pr_reg_aptpl = 1; | |
c66ac9db NB |
842 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ |
843 | pr_reg->pr_res_type = type; | |
844 | /* | |
845 | * If an ISID value had been saved in APTPL metadata for this | |
846 | * SCSI Initiator Port, restore it now. | |
847 | */ | |
848 | if (isid != NULL) { | |
849 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
850 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
851 | pr_reg->isid_present_at_reg = 1; | |
852 | } | |
853 | /* | |
854 | * Copy the i_port and t_port information from caller. | |
855 | */ | |
856 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
857 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
858 | pr_reg->pr_reg_tpgt = tpgt; | |
859 | /* | |
860 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
861 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
862 | * the Initiator Node LUN ACL from the fabric module is created for | |
863 | * this registration. | |
864 | */ | |
865 | pr_reg->pr_res_holder = res_holder; | |
866 | ||
867 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 868 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
869 | " metadata\n", (res_holder) ? "+reservation" : ""); |
870 | return 0; | |
871 | } | |
872 | ||
873 | static void core_scsi3_aptpl_reserve( | |
874 | struct se_device *dev, | |
875 | struct se_portal_group *tpg, | |
876 | struct se_node_acl *node_acl, | |
877 | struct t10_pr_registration *pr_reg) | |
878 | { | |
879 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
880 | |
881 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 882 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
883 | |
884 | spin_lock(&dev->dev_reservation_lock); | |
885 | dev->dev_pr_res_holder = pr_reg; | |
886 | spin_unlock(&dev->dev_reservation_lock); | |
887 | ||
6708bb27 | 888 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 889 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 890 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
891 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
892 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 893 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 894 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
d2843c17 | 895 | i_buf); |
c66ac9db NB |
896 | } |
897 | ||
898 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
33ce6a87 | 899 | struct t10_pr_registration *, enum register_type, int); |
c66ac9db NB |
900 | |
901 | static int __core_scsi3_check_aptpl_registration( | |
902 | struct se_device *dev, | |
903 | struct se_portal_group *tpg, | |
904 | struct se_lun *lun, | |
905 | u32 target_lun, | |
906 | struct se_node_acl *nacl, | |
29a05dee | 907 | u32 mapped_lun) |
c66ac9db NB |
908 | { |
909 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 910 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
911 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
912 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
913 | u16 tpgt; | |
914 | ||
915 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
916 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
917 | /* | |
918 | * Copy Initiator Port information from struct se_node_acl | |
919 | */ | |
920 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
921 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
922 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
923 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
924 | /* |
925 | * Look for the matching registrations+reservation from those | |
926 | * created from APTPL metadata. Note that multiple registrations | |
927 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
928 | * TransportIDs. | |
929 | */ | |
930 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
931 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
932 | pr_reg_aptpl_list) { | |
92404e60 | 933 | |
6708bb27 | 934 | if (!strcmp(pr_reg->pr_iport, i_port) && |
29a05dee | 935 | (pr_reg->pr_res_mapped_lun == mapped_lun) && |
c66ac9db NB |
936 | !(strcmp(pr_reg->pr_tport, t_port)) && |
937 | (pr_reg->pr_reg_tpgt == tpgt) && | |
938 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
939 | ||
940 | pr_reg->pr_reg_nacl = nacl; | |
79dc9c9e | 941 | pr_reg->tg_pt_sep_rtpi = lun->lun_sep->sep_rtpi; |
c66ac9db NB |
942 | |
943 | list_del(&pr_reg->pr_reg_aptpl_list); | |
944 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
945 | /* | |
946 | * At this point all of the pointers in *pr_reg will | |
947 | * be setup, so go ahead and add the registration. | |
948 | */ | |
949 | ||
950 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
951 | /* | |
952 | * If this registration is the reservation holder, | |
953 | * make that happen now.. | |
954 | */ | |
955 | if (pr_reg->pr_res_holder) | |
956 | core_scsi3_aptpl_reserve(dev, tpg, | |
957 | nacl, pr_reg); | |
958 | /* | |
959 | * Reenable pr_aptpl_active to accept new metadata | |
960 | * updates once the SCSI device is active again.. | |
961 | */ | |
962 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
963 | pr_tmpl->pr_aptpl_active = 1; | |
964 | } | |
965 | } | |
966 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | int core_scsi3_check_aptpl_registration( | |
972 | struct se_device *dev, | |
973 | struct se_portal_group *tpg, | |
974 | struct se_lun *lun, | |
e2480563 NB |
975 | struct se_node_acl *nacl, |
976 | u32 mapped_lun) | |
c66ac9db | 977 | { |
d977f437 | 978 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
c66ac9db NB |
979 | return 0; |
980 | ||
981 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
29a05dee NB |
982 | lun->unpacked_lun, nacl, |
983 | mapped_lun); | |
c66ac9db NB |
984 | } |
985 | ||
986 | static void __core_scsi3_dump_registration( | |
9ac8928e | 987 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
988 | struct se_device *dev, |
989 | struct se_node_acl *nacl, | |
990 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 991 | enum register_type register_type) |
c66ac9db NB |
992 | { |
993 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
994 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
995 | |
996 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 997 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 998 | |
6708bb27 | 999 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
33ce6a87 AG |
1000 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? |
1001 | "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? | |
c66ac9db | 1002 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, |
d2843c17 | 1003 | i_buf); |
6708bb27 | 1004 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
1005 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1006 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1007 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1008 | " Port(s)\n", tfo->get_fabric_name(), |
1009 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1010 | dev->transport->name); |
6708bb27 | 1011 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1012 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1013 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1014 | pr_reg->pr_reg_aptpl); | |
1015 | } | |
1016 | ||
c66ac9db NB |
1017 | static void __core_scsi3_add_registration( |
1018 | struct se_device *dev, | |
1019 | struct se_node_acl *nacl, | |
1020 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1021 | enum register_type register_type, |
c66ac9db NB |
1022 | int register_move) |
1023 | { | |
9ac8928e | 1024 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 1025 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
0fd97ccf | 1026 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 | 1027 | struct se_dev_entry *deve; |
c66ac9db NB |
1028 | |
1029 | /* | |
1030 | * Increment PRgeneration counter for struct se_device upon a successful | |
1031 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1032 | * | |
1033 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1034 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1035 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1036 | * for the REGISTER. | |
1037 | */ | |
1038 | pr_reg->pr_res_generation = (register_move) ? | |
0fd97ccf | 1039 | dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1040 | core_scsi3_pr_generation(dev); |
1041 | ||
1042 | spin_lock(&pr_tmpl->registration_lock); | |
1043 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
c66ac9db NB |
1044 | |
1045 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1046 | spin_unlock(&pr_tmpl->registration_lock); | |
80bfdfa9 NB |
1047 | |
1048 | rcu_read_lock(); | |
1049 | deve = pr_reg->pr_reg_deve; | |
1050 | if (deve) | |
1051 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1052 | rcu_read_unlock(); | |
1053 | ||
c66ac9db NB |
1054 | /* |
1055 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1056 | */ | |
6708bb27 | 1057 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1058 | return; |
1059 | /* | |
1060 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1061 | * allocated in __core_scsi3_alloc_registration() | |
1062 | */ | |
1063 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1064 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
80bfdfa9 NB |
1065 | struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; |
1066 | ||
c66ac9db NB |
1067 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
1068 | ||
1069 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1070 | ||
1071 | spin_lock(&pr_tmpl->registration_lock); | |
1072 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1073 | &pr_tmpl->registration_list); | |
c66ac9db | 1074 | |
80bfdfa9 NB |
1075 | __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, |
1076 | register_type); | |
c66ac9db | 1077 | spin_unlock(&pr_tmpl->registration_lock); |
80bfdfa9 NB |
1078 | |
1079 | rcu_read_lock(); | |
1080 | deve = pr_reg_tmp->pr_reg_deve; | |
1081 | if (deve) | |
1082 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1083 | rcu_read_unlock(); | |
1084 | ||
c66ac9db NB |
1085 | /* |
1086 | * Drop configfs group dependency reference from | |
1087 | * __core_scsi3_alloc_registration() | |
1088 | */ | |
1089 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | static int core_scsi3_alloc_registration( | |
1094 | struct se_device *dev, | |
1095 | struct se_node_acl *nacl, | |
79dc9c9e | 1096 | struct se_lun *lun, |
c66ac9db | 1097 | struct se_dev_entry *deve, |
79dc9c9e | 1098 | u32 mapped_lun, |
c66ac9db NB |
1099 | unsigned char *isid, |
1100 | u64 sa_res_key, | |
1101 | int all_tg_pt, | |
1102 | int aptpl, | |
33ce6a87 | 1103 | enum register_type register_type, |
c66ac9db NB |
1104 | int register_move) |
1105 | { | |
1106 | struct t10_pr_registration *pr_reg; | |
1107 | ||
79dc9c9e NB |
1108 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
1109 | isid, sa_res_key, all_tg_pt, | |
1110 | aptpl); | |
6708bb27 | 1111 | if (!pr_reg) |
e3d6f909 | 1112 | return -EPERM; |
c66ac9db NB |
1113 | |
1114 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1115 | register_type, register_move); | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1120 | struct se_device *dev, | |
1121 | struct se_node_acl *nacl, | |
1122 | unsigned char *isid) | |
1123 | { | |
0fd97ccf | 1124 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1125 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1126 | struct se_portal_group *tpg; | |
1127 | ||
1128 | spin_lock(&pr_tmpl->registration_lock); | |
1129 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1130 | &pr_tmpl->registration_list, pr_reg_list) { | |
1131 | /* | |
1132 | * First look for a matching struct se_node_acl | |
1133 | */ | |
1134 | if (pr_reg->pr_reg_nacl != nacl) | |
1135 | continue; | |
1136 | ||
1137 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1138 | /* | |
1139 | * If this registration does NOT contain a fabric provided | |
1140 | * ISID, then we have found a match. | |
1141 | */ | |
6708bb27 | 1142 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1143 | /* |
1144 | * Determine if this SCSI device server requires that | |
1145 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1146 | * for fabric modules (iSCSI) requiring them. | |
1147 | */ | |
e3d6f909 | 1148 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
0fd97ccf | 1149 | if (dev->dev_attrib.enforce_pr_isids) |
c66ac9db NB |
1150 | continue; |
1151 | } | |
33940d09 | 1152 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1153 | spin_unlock(&pr_tmpl->registration_lock); |
1154 | return pr_reg; | |
1155 | } | |
1156 | /* | |
1157 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1158 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1159 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1160 | */ | |
6708bb27 | 1161 | if (!isid) |
c66ac9db NB |
1162 | continue; |
1163 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1164 | continue; | |
1165 | ||
33940d09 | 1166 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1167 | spin_unlock(&pr_tmpl->registration_lock); |
1168 | return pr_reg; | |
1169 | } | |
1170 | spin_unlock(&pr_tmpl->registration_lock); | |
1171 | ||
1172 | return NULL; | |
1173 | } | |
1174 | ||
1175 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1176 | struct se_device *dev, | |
1177 | struct se_node_acl *nacl, | |
1178 | struct se_session *sess) | |
1179 | { | |
1180 | struct se_portal_group *tpg = nacl->se_tpg; | |
1181 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1182 | ||
e3d6f909 | 1183 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1184 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1185 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1186 | PR_REG_ISID_LEN); |
1187 | isid_ptr = &buf[0]; | |
1188 | } | |
1189 | ||
1190 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1191 | } | |
1192 | ||
1193 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1194 | { | |
33940d09 | 1195 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1196 | } |
1197 | ||
125d0119 | 1198 | static int core_scsi3_check_implicit_release( |
c66ac9db NB |
1199 | struct se_device *dev, |
1200 | struct t10_pr_registration *pr_reg) | |
1201 | { | |
1202 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1203 | struct t10_pr_registration *pr_res_holder; | |
1204 | int ret = 0; | |
1205 | ||
1206 | spin_lock(&dev->dev_reservation_lock); | |
1207 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1208 | if (!pr_res_holder) { |
c66ac9db NB |
1209 | spin_unlock(&dev->dev_reservation_lock); |
1210 | return ret; | |
1211 | } | |
1212 | if (pr_res_holder == pr_reg) { | |
1213 | /* | |
125d0119 | 1214 | * Perform an implicit RELEASE if the registration that |
c66ac9db NB |
1215 | * is being released is holding the reservation. |
1216 | * | |
1217 | * From spc4r17, section 5.7.11.1: | |
1218 | * | |
1219 | * e) If the I_T nexus is the persistent reservation holder | |
1220 | * and the persistent reservation is not an all registrants | |
1221 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1222 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1223 | * service action with the SERVICE ACTION RESERVATION KEY | |
1224 | * field set to zero (see 5.7.11.3). | |
1225 | */ | |
6c3c9baa | 1226 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); |
c66ac9db NB |
1227 | ret = 1; |
1228 | /* | |
1229 | * For 'All Registrants' reservation types, all existing | |
1230 | * registrations are still processed as reservation holders | |
1231 | * in core_scsi3_pr_seq_non_holder() after the initial | |
125d0119 | 1232 | * reservation holder is implicitly released here. |
c66ac9db NB |
1233 | */ |
1234 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1235 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1236 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1237 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1238 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1239 | " UNREGISTER while existing reservation with matching" |
1240 | " key 0x%016Lx is present from another SCSI Initiator" | |
1241 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1242 | ret = -EPERM; |
c66ac9db NB |
1243 | } |
1244 | spin_unlock(&dev->dev_reservation_lock); | |
1245 | ||
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | /* | |
e3d6f909 | 1250 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1251 | */ |
1252 | static void __core_scsi3_free_registration( | |
1253 | struct se_device *dev, | |
1254 | struct t10_pr_registration *pr_reg, | |
1255 | struct list_head *preempt_and_abort_list, | |
1256 | int dec_holders) | |
cb0df4d3 BVA |
1257 | __releases(&pr_tmpl->registration_lock) |
1258 | __acquires(&pr_tmpl->registration_lock) | |
c66ac9db | 1259 | { |
9ac8928e | 1260 | const struct target_core_fabric_ops *tfo = |
c66ac9db | 1261 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
0fd97ccf | 1262 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 NB |
1263 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; |
1264 | struct se_dev_entry *deve; | |
c66ac9db | 1265 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
1266 | |
1267 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1268 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1269 | |
6c3c9baa NB |
1270 | if (!list_empty(&pr_reg->pr_reg_list)) |
1271 | list_del(&pr_reg->pr_reg_list); | |
c66ac9db NB |
1272 | /* |
1273 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1274 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1275 | */ | |
1276 | if (dec_holders) | |
1277 | core_scsi3_put_pr_reg(pr_reg); | |
80bfdfa9 NB |
1278 | |
1279 | spin_unlock(&pr_tmpl->registration_lock); | |
c66ac9db NB |
1280 | /* |
1281 | * Wait until all reference from any other I_T nexuses for this | |
1282 | * *pr_reg have been released. Because list_del() is called above, | |
1283 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1284 | * count back to zero, and we release *pr_reg. | |
1285 | */ | |
1286 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
6708bb27 | 1287 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1288 | tfo->get_fabric_name()); |
1289 | cpu_relax(); | |
c66ac9db NB |
1290 | } |
1291 | ||
80bfdfa9 NB |
1292 | rcu_read_lock(); |
1293 | deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); | |
1294 | if (deve) | |
1295 | clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1296 | rcu_read_unlock(); | |
1297 | ||
1298 | spin_lock(&pr_tmpl->registration_lock); | |
6708bb27 | 1299 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1300 | " Node: %s%s\n", tfo->get_fabric_name(), |
1301 | pr_reg->pr_reg_nacl->initiatorname, | |
d2843c17 | 1302 | i_buf); |
6708bb27 | 1303 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1304 | " Port(s)\n", tfo->get_fabric_name(), |
1305 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1306 | dev->transport->name); |
6708bb27 | 1307 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1308 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1309 | pr_reg->pr_res_generation); | |
1310 | ||
6708bb27 | 1311 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1312 | pr_reg->pr_reg_deve = NULL; |
1313 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
1314 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1315 | return; | |
1316 | } | |
1317 | /* | |
1318 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1319 | * are released once the ABORT_TASK_SET has completed.. | |
1320 | */ | |
1321 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1322 | } | |
1323 | ||
1324 | void core_scsi3_free_pr_reg_from_nacl( | |
1325 | struct se_device *dev, | |
1326 | struct se_node_acl *nacl) | |
1327 | { | |
0fd97ccf | 1328 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1329 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
6c3c9baa | 1330 | bool free_reg = false; |
c66ac9db NB |
1331 | /* |
1332 | * If the passed se_node_acl matches the reservation holder, | |
1333 | * release the reservation. | |
1334 | */ | |
1335 | spin_lock(&dev->dev_reservation_lock); | |
1336 | pr_res_holder = dev->dev_pr_res_holder; | |
1337 | if ((pr_res_holder != NULL) && | |
6c3c9baa NB |
1338 | (pr_res_holder->pr_reg_nacl == nacl)) { |
1339 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); | |
1340 | free_reg = true; | |
1341 | } | |
c66ac9db NB |
1342 | spin_unlock(&dev->dev_reservation_lock); |
1343 | /* | |
1344 | * Release any registration associated with the struct se_node_acl. | |
1345 | */ | |
1346 | spin_lock(&pr_tmpl->registration_lock); | |
6c3c9baa NB |
1347 | if (pr_res_holder && free_reg) |
1348 | __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); | |
1349 | ||
c66ac9db NB |
1350 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
1351 | &pr_tmpl->registration_list, pr_reg_list) { | |
1352 | ||
1353 | if (pr_reg->pr_reg_nacl != nacl) | |
1354 | continue; | |
1355 | ||
1356 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1357 | } | |
1358 | spin_unlock(&pr_tmpl->registration_lock); | |
1359 | } | |
1360 | ||
1361 | void core_scsi3_free_all_registrations( | |
1362 | struct se_device *dev) | |
1363 | { | |
0fd97ccf | 1364 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1365 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1366 | ||
1367 | spin_lock(&dev->dev_reservation_lock); | |
1368 | pr_res_holder = dev->dev_pr_res_holder; | |
1369 | if (pr_res_holder != NULL) { | |
1370 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1371 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 1372 | pr_res_holder, 0, 0); |
c66ac9db NB |
1373 | } |
1374 | spin_unlock(&dev->dev_reservation_lock); | |
1375 | ||
1376 | spin_lock(&pr_tmpl->registration_lock); | |
1377 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1378 | &pr_tmpl->registration_list, pr_reg_list) { | |
1379 | ||
1380 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1381 | } | |
1382 | spin_unlock(&pr_tmpl->registration_lock); | |
1383 | ||
1384 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1385 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1386 | pr_reg_aptpl_list) { | |
1387 | list_del(&pr_reg->pr_reg_aptpl_list); | |
c66ac9db NB |
1388 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1389 | } | |
1390 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1391 | } | |
1392 | ||
1393 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1394 | { | |
d588cf8f | 1395 | return target_depend_item(&tpg->tpg_group.cg_item); |
c66ac9db NB |
1396 | } |
1397 | ||
1398 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1399 | { | |
d588cf8f | 1400 | target_undepend_item(&tpg->tpg_group.cg_item); |
33940d09 | 1401 | atomic_dec_mb(&tpg->tpg_pr_ref_count); |
c66ac9db NB |
1402 | } |
1403 | ||
1404 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1405 | { | |
c66ac9db NB |
1406 | if (nacl->dynamic_node_acl) |
1407 | return 0; | |
d588cf8f | 1408 | return target_depend_item(&nacl->acl_group.cg_item); |
c66ac9db NB |
1409 | } |
1410 | ||
1411 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1412 | { | |
d588cf8f CH |
1413 | if (!nacl->dynamic_node_acl) |
1414 | target_undepend_item(&nacl->acl_group.cg_item); | |
33940d09 | 1415 | atomic_dec_mb(&nacl->acl_pr_ref_count); |
c66ac9db NB |
1416 | } |
1417 | ||
1418 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1419 | { | |
79dc9c9e | 1420 | struct se_lun_acl *lun_acl; |
c66ac9db NB |
1421 | struct se_node_acl *nacl; |
1422 | struct se_portal_group *tpg; | |
1423 | /* | |
1424 | * For nacl->dynamic_node_acl=1 | |
1425 | */ | |
79dc9c9e NB |
1426 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
1427 | atomic_read(&se_deve->pr_kref.refcount) != 0); | |
6708bb27 | 1428 | if (!lun_acl) |
c66ac9db NB |
1429 | return 0; |
1430 | ||
1431 | nacl = lun_acl->se_lun_nacl; | |
1432 | tpg = nacl->se_tpg; | |
1433 | ||
d588cf8f | 1434 | return target_depend_item(&lun_acl->se_lun_group.cg_item); |
c66ac9db NB |
1435 | } |
1436 | ||
1437 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1438 | { | |
29a05dee | 1439 | struct se_lun_acl *lun_acl; |
c66ac9db NB |
1440 | struct se_node_acl *nacl; |
1441 | struct se_portal_group *tpg; | |
1442 | /* | |
1443 | * For nacl->dynamic_node_acl=1 | |
1444 | */ | |
79dc9c9e NB |
1445 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
1446 | atomic_read(&se_deve->pr_kref.refcount) != 0); | |
6708bb27 | 1447 | if (!lun_acl) { |
29a05dee | 1448 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1449 | return; |
1450 | } | |
1451 | nacl = lun_acl->se_lun_nacl; | |
1452 | tpg = nacl->se_tpg; | |
1453 | ||
d588cf8f | 1454 | target_undepend_item(&lun_acl->se_lun_group.cg_item); |
29a05dee | 1455 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1456 | } |
1457 | ||
de103c93 CH |
1458 | static sense_reason_t |
1459 | core_scsi3_decode_spec_i_port( | |
c66ac9db NB |
1460 | struct se_cmd *cmd, |
1461 | struct se_portal_group *tpg, | |
1462 | unsigned char *l_isid, | |
1463 | u64 sa_res_key, | |
1464 | int all_tg_pt, | |
1465 | int aptpl) | |
1466 | { | |
5951146d | 1467 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1468 | struct se_port *tmp_port; |
1469 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1470 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db | 1471 | struct se_node_acl *dest_node_acl = NULL; |
79dc9c9e | 1472 | struct se_dev_entry *dest_se_deve = NULL; |
c66ac9db NB |
1473 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; |
1474 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1475 | LIST_HEAD(tid_dest_list); |
c66ac9db | 1476 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
2650d71e CH |
1477 | unsigned char *buf, *ptr, proto_ident; |
1478 | const unsigned char *i_str; | |
13ba564c | 1479 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 1480 | sense_reason_t ret; |
c66ac9db | 1481 | u32 tpdl, tid_len = 0; |
c66ac9db NB |
1482 | u32 dest_rtpi = 0; |
1483 | ||
c66ac9db NB |
1484 | /* |
1485 | * Allocate a struct pr_transport_id_holder and setup the | |
79dc9c9e NB |
1486 | * local_node_acl pointer and add to struct list_head tid_dest_list |
1487 | * for add registration processing in the loop of tid_dest_list below. | |
c66ac9db NB |
1488 | */ |
1489 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1490 | if (!tidh_new) { |
1491 | pr_err("Unable to allocate tidh_new\n"); | |
de103c93 | 1492 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1493 | } |
1494 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1495 | tidh_new->dest_tpg = tpg; | |
1496 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
c66ac9db | 1497 | |
5951146d | 1498 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1499 | se_sess->se_node_acl, cmd->se_lun, |
1500 | NULL, cmd->orig_fe_lun, l_isid, | |
c66ac9db | 1501 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 1502 | if (!local_pr_reg) { |
c66ac9db | 1503 | kfree(tidh_new); |
de103c93 | 1504 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1505 | } |
1506 | tidh_new->dest_pr_reg = local_pr_reg; | |
1507 | /* | |
1508 | * The local I_T nexus does not hold any configfs dependances, | |
79dc9c9e | 1509 | * so we set tidh_new->dest_se_deve to NULL to prevent the |
c66ac9db NB |
1510 | * configfs_undepend_item() calls in the tid_dest_list loops below. |
1511 | */ | |
79dc9c9e | 1512 | tidh_new->dest_se_deve = NULL; |
c66ac9db | 1513 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); |
05d1c7c0 | 1514 | |
0d7f1299 PB |
1515 | if (cmd->data_length < 28) { |
1516 | pr_warn("SPC-PR: Received PR OUT parameter list" | |
1517 | " length too small: %u\n", cmd->data_length); | |
de103c93 | 1518 | ret = TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
1519 | goto out; |
1520 | } | |
1521 | ||
4949314c | 1522 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1523 | if (!buf) { |
1524 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1525 | goto out; | |
1526 | } | |
1527 | ||
c66ac9db NB |
1528 | /* |
1529 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1530 | * first extract TransportID Parameter Data Length, and make sure | |
1531 | * the value matches up to the SCSI expected data transfer length. | |
1532 | */ | |
1533 | tpdl = (buf[24] & 0xff) << 24; | |
1534 | tpdl |= (buf[25] & 0xff) << 16; | |
1535 | tpdl |= (buf[26] & 0xff) << 8; | |
1536 | tpdl |= buf[27] & 0xff; | |
1537 | ||
1538 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1539 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1540 | " does not equal CDB data_length: %u\n", tpdl, |
1541 | cmd->data_length); | |
de103c93 CH |
1542 | ret = TCM_INVALID_PARAMETER_LIST; |
1543 | goto out_unmap; | |
c66ac9db NB |
1544 | } |
1545 | /* | |
1546 | * Start processing the received transport IDs using the | |
1547 | * receiving I_T Nexus portal's fabric dependent methods to | |
1548 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1549 | */ | |
1550 | ptr = &buf[28]; | |
1551 | ||
1552 | while (tpdl > 0) { | |
79dc9c9e NB |
1553 | struct se_lun *dest_lun; |
1554 | ||
c66ac9db NB |
1555 | proto_ident = (ptr[0] & 0x0f); |
1556 | dest_tpg = NULL; | |
1557 | ||
1558 | spin_lock(&dev->se_port_lock); | |
1559 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1560 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1561 | if (!tmp_tpg) |
c66ac9db | 1562 | continue; |
2650d71e | 1563 | |
c66ac9db NB |
1564 | /* |
1565 | * Look for the matching proto_ident provided by | |
1566 | * the received TransportID | |
1567 | */ | |
2aeeafae | 1568 | if (tmp_tpg->proto_id != proto_ident) |
c66ac9db NB |
1569 | continue; |
1570 | dest_rtpi = tmp_port->sep_rtpi; | |
1571 | ||
2650d71e CH |
1572 | i_str = target_parse_pr_out_transport_id(tmp_tpg, |
1573 | (const char *)ptr, &tid_len, &iport_ptr); | |
6708bb27 | 1574 | if (!i_str) |
c66ac9db NB |
1575 | continue; |
1576 | ||
33940d09 | 1577 | atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); |
c66ac9db NB |
1578 | spin_unlock(&dev->se_port_lock); |
1579 | ||
de103c93 | 1580 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
6708bb27 | 1581 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db | 1582 | " for tmp_tpg\n"); |
33940d09 | 1583 | atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); |
de103c93 CH |
1584 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1585 | goto out_unmap; | |
c66ac9db NB |
1586 | } |
1587 | /* | |
35d1efe8 | 1588 | * Locate the destination initiator ACL to be registered |
c66ac9db NB |
1589 | * from the decoded fabric module specific TransportID |
1590 | * at *i_str. | |
1591 | */ | |
403edd78 | 1592 | mutex_lock(&tmp_tpg->acl_node_mutex); |
c66ac9db NB |
1593 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1594 | tmp_tpg, i_str); | |
33940d09 JE |
1595 | if (dest_node_acl) |
1596 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 1597 | mutex_unlock(&tmp_tpg->acl_node_mutex); |
c66ac9db | 1598 | |
6708bb27 | 1599 | if (!dest_node_acl) { |
c66ac9db NB |
1600 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1601 | spin_lock(&dev->se_port_lock); | |
1602 | continue; | |
1603 | } | |
1604 | ||
de103c93 | 1605 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
6708bb27 | 1606 | pr_err("configfs_depend_item() failed" |
c66ac9db | 1607 | " for dest_node_acl->acl_group\n"); |
33940d09 | 1608 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 1609 | core_scsi3_tpg_undepend_item(tmp_tpg); |
de103c93 CH |
1610 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1611 | goto out_unmap; | |
c66ac9db NB |
1612 | } |
1613 | ||
1614 | dest_tpg = tmp_tpg; | |
6708bb27 | 1615 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1616 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1617 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1618 | dest_node_acl->initiatorname, dest_rtpi); |
1619 | ||
1620 | spin_lock(&dev->se_port_lock); | |
1621 | break; | |
1622 | } | |
1623 | spin_unlock(&dev->se_port_lock); | |
1624 | ||
6708bb27 AG |
1625 | if (!dest_tpg) { |
1626 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1627 | " dest_tpg\n"); |
de103c93 CH |
1628 | ret = TCM_INVALID_PARAMETER_LIST; |
1629 | goto out_unmap; | |
c66ac9db | 1630 | } |
8b1e1244 | 1631 | |
6708bb27 | 1632 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1633 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1634 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db | 1635 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1636 | |
c66ac9db | 1637 | if (tid_len > tpdl) { |
6708bb27 | 1638 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1639 | " %u for Transport ID: %s\n", tid_len, ptr); |
1640 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1641 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1642 | ret = TCM_INVALID_PARAMETER_LIST; |
1643 | goto out_unmap; | |
c66ac9db NB |
1644 | } |
1645 | /* | |
1646 | * Locate the desintation struct se_dev_entry pointer for matching | |
1647 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1648 | * Target Port. | |
1649 | */ | |
1650 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1651 | dest_rtpi); | |
6708bb27 AG |
1652 | if (!dest_se_deve) { |
1653 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1654 | " from destination RTPI: %hu\n", |
e3d6f909 | 1655 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1656 | dest_rtpi); |
1657 | ||
1658 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1659 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1660 | ret = TCM_INVALID_PARAMETER_LIST; |
1661 | goto out_unmap; | |
c66ac9db NB |
1662 | } |
1663 | ||
de103c93 | 1664 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 1665 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db | 1666 | " failed\n"); |
29a05dee | 1667 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1668 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
1669 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1670 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1671 | goto out_unmap; | |
c66ac9db | 1672 | } |
8b1e1244 | 1673 | |
6708bb27 | 1674 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1675 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1676 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 1677 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1678 | |
c66ac9db NB |
1679 | /* |
1680 | * Skip any TransportIDs that already have a registration for | |
1681 | * this target port. | |
1682 | */ | |
1683 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1684 | iport_ptr); | |
1685 | if (pr_reg_e) { | |
1686 | core_scsi3_put_pr_reg(pr_reg_e); | |
1687 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1688 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1689 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1690 | ptr += tid_len; | |
1691 | tpdl -= tid_len; | |
1692 | tid_len = 0; | |
1693 | continue; | |
1694 | } | |
1695 | /* | |
1696 | * Allocate a struct pr_transport_id_holder and setup | |
1697 | * the dest_node_acl and dest_se_deve pointers for the | |
1698 | * loop below. | |
1699 | */ | |
1700 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1701 | GFP_KERNEL); | |
6708bb27 AG |
1702 | if (!tidh_new) { |
1703 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1704 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1705 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1706 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1707 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1708 | goto out_unmap; | |
c66ac9db NB |
1709 | } |
1710 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1711 | tidh_new->dest_tpg = dest_tpg; | |
1712 | tidh_new->dest_node_acl = dest_node_acl; | |
1713 | tidh_new->dest_se_deve = dest_se_deve; | |
1714 | ||
1715 | /* | |
1716 | * Allocate, but do NOT add the registration for the | |
1717 | * TransportID referenced SCSI Initiator port. This | |
1718 | * done because of the following from spc4r17 in section | |
1719 | * 6.14.3 wrt SPEC_I_PT: | |
1720 | * | |
1721 | * "If a registration fails for any initiator port (e.g., if th | |
1722 | * logical unit does not have enough resources available to | |
1723 | * hold the registration information), no registrations shall be | |
1724 | * made, and the command shall be terminated with | |
1725 | * CHECK CONDITION status." | |
1726 | * | |
1727 | * That means we call __core_scsi3_alloc_registration() here, | |
1728 | * and then call __core_scsi3_add_registration() in the | |
1729 | * 2nd loop which will never fail. | |
1730 | */ | |
79dc9c9e NB |
1731 | dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
1732 | atomic_read(&dest_se_deve->pr_kref.refcount) != 0); | |
1733 | ||
5951146d | 1734 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1735 | dest_node_acl, dest_lun, dest_se_deve, |
1736 | dest_se_deve->mapped_lun, iport_ptr, | |
1737 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1738 | if (!dest_pr_reg) { |
c66ac9db NB |
1739 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1740 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1741 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1742 | kfree(tidh_new); | |
de103c93 CH |
1743 | ret = TCM_INVALID_PARAMETER_LIST; |
1744 | goto out_unmap; | |
c66ac9db NB |
1745 | } |
1746 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1747 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1748 | ||
1749 | ptr += tid_len; | |
1750 | tpdl -= tid_len; | |
1751 | tid_len = 0; | |
1752 | ||
1753 | } | |
05d1c7c0 | 1754 | |
4949314c | 1755 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1756 | |
c66ac9db NB |
1757 | /* |
1758 | * Go ahead and create a registrations from tid_dest_list for the | |
1759 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1760 | * and dest_se_deve. | |
1761 | * | |
1762 | * The SA Reservation Key from the PROUT is set for the | |
1763 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1764 | * means that the TransportID Initiator port will be | |
1765 | * registered on all of the target ports in the SCSI target device | |
1766 | * ALL_TG_PT=0 means the registration will only be for the | |
1767 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1768 | * was received. | |
1769 | */ | |
1770 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1771 | dest_tpg = tidh->dest_tpg; | |
1772 | dest_node_acl = tidh->dest_node_acl; | |
1773 | dest_se_deve = tidh->dest_se_deve; | |
1774 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1775 | |
1776 | list_del(&tidh->dest_list); | |
1777 | kfree(tidh); | |
1778 | ||
1779 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1780 | core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1781 | |
5951146d | 1782 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1783 | dest_pr_reg, 0, 0); |
1784 | ||
6708bb27 | 1785 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1786 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1787 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
79dc9c9e NB |
1788 | dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? |
1789 | dest_se_deve->mapped_lun : 0); | |
c66ac9db | 1790 | |
79dc9c9e | 1791 | if (!dest_se_deve) |
c66ac9db NB |
1792 | continue; |
1793 | ||
1794 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1795 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1796 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1797 | } | |
1798 | ||
1799 | return 0; | |
de103c93 | 1800 | out_unmap: |
4949314c | 1801 | transport_kunmap_data_sg(cmd); |
de103c93 | 1802 | out: |
c66ac9db NB |
1803 | /* |
1804 | * For the failure case, release everything from tid_dest_list | |
1805 | * including *dest_pr_reg and the configfs dependances.. | |
1806 | */ | |
1807 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1808 | dest_tpg = tidh->dest_tpg; | |
1809 | dest_node_acl = tidh->dest_node_acl; | |
1810 | dest_se_deve = tidh->dest_se_deve; | |
1811 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1812 | |
1813 | list_del(&tidh->dest_list); | |
1814 | kfree(tidh); | |
1815 | /* | |
1816 | * Release any extra ALL_TG_PT=1 registrations for | |
1817 | * the SPEC_I_PT=1 case. | |
1818 | */ | |
1819 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1820 | &dest_pr_reg->pr_reg_atp_list, | |
1821 | pr_reg_atp_mem_list) { | |
1822 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1823 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1824 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1825 | } | |
1826 | ||
c66ac9db NB |
1827 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); |
1828 | ||
79dc9c9e | 1829 | if (!dest_se_deve) |
c66ac9db NB |
1830 | continue; |
1831 | ||
1832 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1833 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1834 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1835 | } | |
1836 | return ret; | |
1837 | } | |
1838 | ||
3c8a6228 | 1839 | static int core_scsi3_update_aptpl_buf( |
c66ac9db NB |
1840 | struct se_device *dev, |
1841 | unsigned char *buf, | |
0607decd | 1842 | u32 pr_aptpl_buf_len) |
c66ac9db | 1843 | { |
c66ac9db | 1844 | struct se_portal_group *tpg; |
c66ac9db NB |
1845 | struct t10_pr_registration *pr_reg; |
1846 | unsigned char tmp[512], isid_buf[32]; | |
1847 | ssize_t len = 0; | |
1848 | int reg_count = 0; | |
3c8a6228 | 1849 | int ret = 0; |
c66ac9db | 1850 | |
3c8a6228 AG |
1851 | spin_lock(&dev->dev_reservation_lock); |
1852 | spin_lock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1853 | /* |
1854 | * Walk the registration list.. | |
1855 | */ | |
0fd97ccf | 1856 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
c66ac9db NB |
1857 | pr_reg_list) { |
1858 | ||
1859 | tmp[0] = '\0'; | |
1860 | isid_buf[0] = '\0'; | |
1861 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
c66ac9db NB |
1862 | /* |
1863 | * Write out any ISID value to APTPL metadata that was included | |
1864 | * in the original registration. | |
1865 | */ | |
1866 | if (pr_reg->isid_present_at_reg) | |
1867 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1868 | pr_reg->pr_reg_isid); | |
1869 | /* | |
1870 | * Include special metadata if the pr_reg matches the | |
1871 | * reservation holder. | |
1872 | */ | |
1873 | if (dev->dev_pr_res_holder == pr_reg) { | |
1874 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1875 | "\ninitiator_fabric=%s\n" | |
1876 | "initiator_node=%s\n%s" | |
1877 | "sa_res_key=%llu\n" | |
1878 | "res_holder=1\nres_type=%02x\n" | |
1879 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1880 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1881 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1882 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1883 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1884 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1885 | pr_reg->pr_res_mapped_lun); | |
1886 | } else { | |
1887 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1888 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1889 | "sa_res_key=%llu\nres_holder=0\n" | |
1890 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1891 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1892 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1893 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1894 | pr_reg->pr_res_mapped_lun); | |
1895 | } | |
1896 | ||
60d645a4 | 1897 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1898 | pr_err("Unable to update renaming APTPL metadata," |
1899 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1900 | ret = -EMSGSIZE; |
1901 | goto out; | |
c66ac9db NB |
1902 | } |
1903 | len += sprintf(buf+len, "%s", tmp); | |
1904 | ||
1905 | /* | |
1906 | * Include information about the associated SCSI target port. | |
1907 | */ | |
1908 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1909 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1910 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1911 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1912 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
79dc9c9e NB |
1913 | pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, |
1914 | reg_count); | |
c66ac9db | 1915 | |
60d645a4 | 1916 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1917 | pr_err("Unable to update renaming APTPL metadata," |
1918 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1919 | ret = -EMSGSIZE; |
1920 | goto out; | |
c66ac9db NB |
1921 | } |
1922 | len += sprintf(buf+len, "%s", tmp); | |
1923 | reg_count++; | |
1924 | } | |
c66ac9db | 1925 | |
6708bb27 | 1926 | if (!reg_count) |
c66ac9db NB |
1927 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1928 | ||
3c8a6228 AG |
1929 | out: |
1930 | spin_unlock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1931 | spin_unlock(&dev->dev_reservation_lock); |
1932 | ||
1933 | return ret; | |
1934 | } | |
1935 | ||
c66ac9db NB |
1936 | static int __core_scsi3_write_aptpl_to_file( |
1937 | struct se_device *dev, | |
4dee96fb | 1938 | unsigned char *buf) |
c66ac9db | 1939 | { |
0fd97ccf | 1940 | struct t10_wwn *wwn = &dev->t10_wwn; |
c66ac9db | 1941 | struct file *file; |
c66ac9db NB |
1942 | int flags = O_RDWR | O_CREAT | O_TRUNC; |
1943 | char path[512]; | |
4dee96fb | 1944 | u32 pr_aptpl_buf_len; |
c66ac9db NB |
1945 | int ret; |
1946 | ||
c66ac9db NB |
1947 | memset(path, 0, 512); |
1948 | ||
60d645a4 | 1949 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 1950 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 1951 | " into path buffer\n"); |
e3d6f909 | 1952 | return -EMSGSIZE; |
c66ac9db NB |
1953 | } |
1954 | ||
1955 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
1956 | file = filp_open(path, flags, 0600); | |
0e9b10a9 | 1957 | if (IS_ERR(file)) { |
6708bb27 | 1958 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 1959 | " failed\n", path); |
0e9b10a9 | 1960 | return PTR_ERR(file); |
c66ac9db NB |
1961 | } |
1962 | ||
4dee96fb | 1963 | pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ |
c66ac9db | 1964 | |
0e9b10a9 | 1965 | ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); |
c66ac9db | 1966 | |
0e9b10a9 | 1967 | if (ret < 0) |
6708bb27 | 1968 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
0e9b10a9 | 1969 | fput(file); |
c66ac9db | 1970 | |
f730f915 | 1971 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
1972 | } |
1973 | ||
459f213b AG |
1974 | /* |
1975 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
1976 | * write out the updated metadata to struct file for this SCSI device. | |
1977 | */ | |
8a391857 | 1978 | static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) |
c66ac9db | 1979 | { |
8a391857 | 1980 | unsigned char *buf; |
f161d4b4 | 1981 | int rc, len = PR_APTPL_BUF_LEN; |
de103c93 | 1982 | |
459f213b AG |
1983 | if (!aptpl) { |
1984 | char *null_buf = "No Registrations or Reservations\n"; | |
1985 | ||
8a391857 | 1986 | rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); |
459f213b AG |
1987 | dev->t10_pr.pr_aptpl_active = 0; |
1988 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); | |
459f213b | 1989 | |
8a391857 NB |
1990 | if (rc) |
1991 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
459f213b | 1992 | |
8a391857 NB |
1993 | return 0; |
1994 | } | |
f161d4b4 NB |
1995 | retry: |
1996 | buf = vzalloc(len); | |
8a391857 NB |
1997 | if (!buf) |
1998 | return TCM_OUT_OF_RESOURCES; | |
1999 | ||
f161d4b4 | 2000 | rc = core_scsi3_update_aptpl_buf(dev, buf, len); |
8a391857 | 2001 | if (rc < 0) { |
f161d4b4 NB |
2002 | vfree(buf); |
2003 | len *= 2; | |
2004 | goto retry; | |
c66ac9db NB |
2005 | } |
2006 | ||
8a391857 NB |
2007 | rc = __core_scsi3_write_aptpl_to_file(dev, buf); |
2008 | if (rc != 0) { | |
2009 | pr_err("SPC-3 PR: Could not update APTPL\n"); | |
f161d4b4 | 2010 | vfree(buf); |
8a391857 NB |
2011 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2012 | } | |
2013 | dev->t10_pr.pr_aptpl_active = 1; | |
f161d4b4 | 2014 | vfree(buf); |
8a391857 NB |
2015 | pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); |
2016 | return 0; | |
c66ac9db NB |
2017 | } |
2018 | ||
de103c93 CH |
2019 | static sense_reason_t |
2020 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, | |
bc118fe4 | 2021 | bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) |
c66ac9db | 2022 | { |
e3d6f909 | 2023 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2024 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2025 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2026 | struct se_portal_group *se_tpg; |
bc118fe4 | 2027 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; |
0fd97ccf | 2028 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2029 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
a0d50f62 | 2030 | sense_reason_t ret = TCM_NO_SENSE; |
fc09149d | 2031 | int pr_holder = 0, type; |
c66ac9db | 2032 | |
6708bb27 AG |
2033 | if (!se_sess || !se_lun) { |
2034 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2035 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2036 | } |
2037 | se_tpg = se_sess->se_tpg; | |
29a05dee | 2038 | |
e3d6f909 | 2039 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2040 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2041 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2042 | PR_REG_ISID_LEN); |
2043 | isid_ptr = &isid_buf[0]; | |
2044 | } | |
2045 | /* | |
2046 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2047 | */ | |
bc118fe4 AG |
2048 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
2049 | if (!pr_reg) { | |
c66ac9db | 2050 | if (res_key) { |
6708bb27 | 2051 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2052 | " for SA REGISTER, returning CONFLICT\n"); |
de103c93 | 2053 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2054 | } |
2055 | /* | |
2056 | * Do nothing but return GOOD status. | |
2057 | */ | |
79dc9c9e | 2058 | if (!sa_res_key) |
03e98c9e | 2059 | return 0; |
79dc9c9e | 2060 | |
6708bb27 | 2061 | if (!spec_i_pt) { |
c66ac9db NB |
2062 | /* |
2063 | * Perform the Service Action REGISTER on the Initiator | |
2064 | * Port Endpoint that the PRO was received from on the | |
2065 | * Logical Unit of the SCSI device server. | |
2066 | */ | |
de103c93 | 2067 | if (core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
2068 | se_sess->se_node_acl, cmd->se_lun, |
2069 | NULL, cmd->orig_fe_lun, isid_ptr, | |
c66ac9db | 2070 | sa_res_key, all_tg_pt, aptpl, |
33ce6a87 | 2071 | register_type, 0)) { |
6708bb27 | 2072 | pr_err("Unable to allocate" |
c66ac9db | 2073 | " struct t10_pr_registration\n"); |
de103c93 | 2074 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2075 | } |
2076 | } else { | |
2077 | /* | |
2078 | * Register both the Initiator port that received | |
2079 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2080 | * TransportID from Parameter list and loop through | |
2081 | * fabric dependent parameter list while calling | |
2082 | * logic from of core_scsi3_alloc_registration() for | |
2083 | * each TransportID provided SCSI Initiator Port/Device | |
2084 | */ | |
79dc9c9e | 2085 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, |
c66ac9db | 2086 | isid_ptr, sa_res_key, all_tg_pt, aptpl); |
79dc9c9e | 2087 | if (ret != 0) |
c66ac9db NB |
2088 | return ret; |
2089 | } | |
459f213b | 2090 | return core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 CH |
2091 | } |
2092 | ||
bc118fe4 AG |
2093 | /* ok, existing registration */ |
2094 | ||
2095 | if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { | |
2096 | pr_err("SPC-3 PR REGISTER: Received" | |
2097 | " res_key: 0x%016Lx does not match" | |
2098 | " existing SA REGISTER res_key:" | |
2099 | " 0x%016Lx\n", res_key, | |
2100 | pr_reg->pr_res_key); | |
2101 | ret = TCM_RESERVATION_CONFLICT; | |
2102 | goto out; | |
de103c93 CH |
2103 | } |
2104 | ||
2105 | if (spec_i_pt) { | |
1f070cc2 AG |
2106 | pr_err("SPC-3 PR REGISTER: SPEC_I_PT" |
2107 | " set on a registered nexus\n"); | |
de103c93 | 2108 | ret = TCM_INVALID_PARAMETER_LIST; |
bc118fe4 | 2109 | goto out; |
de103c93 CH |
2110 | } |
2111 | ||
2112 | /* | |
2113 | * An existing ALL_TG_PT=1 registration being released | |
2114 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2115 | */ | |
1f070cc2 AG |
2116 | if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { |
2117 | pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" | |
de103c93 CH |
2118 | " registration exists, but ALL_TG_PT=1 bit not" |
2119 | " present in received PROUT\n"); | |
2120 | ret = TCM_INVALID_CDB_FIELD; | |
bc118fe4 | 2121 | goto out; |
de103c93 CH |
2122 | } |
2123 | ||
de103c93 | 2124 | /* |
51d9c41d | 2125 | * sa_res_key=1 Change Reservation Key for registered I_T Nexus. |
de103c93 | 2126 | */ |
51d9c41d AG |
2127 | if (sa_res_key) { |
2128 | /* | |
2129 | * Increment PRgeneration counter for struct se_device" | |
2130 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2131 | * READ_KEYS service action. | |
2132 | */ | |
2133 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); | |
2134 | pr_reg->pr_res_key = sa_res_key; | |
2135 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2136 | " Key for %s to: 0x%016Lx PRgeneration:" | |
2137 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), | |
2138 | (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", | |
2139 | pr_reg->pr_reg_nacl->initiatorname, | |
2140 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2141 | ||
2142 | } else { | |
2143 | /* | |
2144 | * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. | |
2145 | */ | |
6c3c9baa NB |
2146 | type = pr_reg->pr_res_type; |
2147 | pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, | |
2148 | pr_reg); | |
de103c93 | 2149 | if (pr_holder < 0) { |
de103c93 | 2150 | ret = TCM_RESERVATION_CONFLICT; |
bc118fe4 | 2151 | goto out; |
c66ac9db | 2152 | } |
de103c93 CH |
2153 | |
2154 | spin_lock(&pr_tmpl->registration_lock); | |
c66ac9db | 2155 | /* |
de103c93 CH |
2156 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
2157 | * and matching pr_res_key. | |
c66ac9db | 2158 | */ |
de103c93 CH |
2159 | if (pr_reg->pr_reg_all_tg_pt) { |
2160 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2161 | &pr_tmpl->registration_list, | |
2162 | pr_reg_list) { | |
2163 | ||
2164 | if (!pr_reg_p->pr_reg_all_tg_pt) | |
2165 | continue; | |
2166 | if (pr_reg_p->pr_res_key != res_key) | |
2167 | continue; | |
2168 | if (pr_reg == pr_reg_p) | |
2169 | continue; | |
2170 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2171 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2172 | continue; | |
2173 | ||
2174 | __core_scsi3_free_registration(dev, | |
2175 | pr_reg_p, NULL, 0); | |
c66ac9db NB |
2176 | } |
2177 | } | |
de103c93 | 2178 | |
c66ac9db | 2179 | /* |
de103c93 | 2180 | * Release the calling I_T Nexus registration now.. |
c66ac9db | 2181 | */ |
de103c93 | 2182 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
fc09149d | 2183 | pr_reg = NULL; |
c66ac9db | 2184 | |
de103c93 CH |
2185 | /* |
2186 | * From spc4r17, section 5.7.11.3 Unregistering | |
2187 | * | |
2188 | * If the persistent reservation is a registrants only | |
2189 | * type, the device server shall establish a unit | |
2190 | * attention condition for the initiator port associated | |
2191 | * with every registered I_T nexus except for the I_T | |
2192 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2193 | * received, with the additional sense code set to | |
2194 | * RESERVATIONS RELEASED. | |
2195 | */ | |
2196 | if (pr_holder && | |
fc09149d NB |
2197 | (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || |
2198 | type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { | |
de103c93 CH |
2199 | list_for_each_entry(pr_reg_p, |
2200 | &pr_tmpl->registration_list, | |
2201 | pr_reg_list) { | |
2202 | ||
2203 | core_scsi3_ua_allocate( | |
2204 | pr_reg_p->pr_reg_nacl, | |
2205 | pr_reg_p->pr_res_mapped_lun, | |
2206 | 0x2A, | |
2207 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
c66ac9db | 2208 | } |
de103c93 | 2209 | } |
c66ac9db | 2210 | |
51d9c41d | 2211 | spin_unlock(&pr_tmpl->registration_lock); |
de103c93 | 2212 | } |
c66ac9db | 2213 | |
459f213b | 2214 | ret = core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 | 2215 | |
bc118fe4 | 2216 | out: |
fc09149d NB |
2217 | if (pr_reg) |
2218 | core_scsi3_put_pr_reg(pr_reg); | |
de103c93 | 2219 | return ret; |
c66ac9db NB |
2220 | } |
2221 | ||
2222 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2223 | { | |
2224 | switch (type) { | |
2225 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2226 | return "Write Exclusive Access"; | |
2227 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2228 | return "Exclusive Access"; | |
2229 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2230 | return "Write Exclusive Access, Registrants Only"; | |
2231 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2232 | return "Exclusive Access, Registrants Only"; | |
2233 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2234 | return "Write Exclusive Access, All Registrants"; | |
2235 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2236 | return "Exclusive Access, All Registrants"; | |
2237 | default: | |
2238 | break; | |
2239 | } | |
2240 | ||
2241 | return "Unknown SPC-3 PR Type"; | |
2242 | } | |
2243 | ||
de103c93 CH |
2244 | static sense_reason_t |
2245 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) | |
c66ac9db | 2246 | { |
de103c93 | 2247 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2248 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2249 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2250 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
0fd97ccf | 2251 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2252 | char i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 2253 | sense_reason_t ret; |
c66ac9db NB |
2254 | |
2255 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2256 | ||
6708bb27 AG |
2257 | if (!se_sess || !se_lun) { |
2258 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2259 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2260 | } |
c66ac9db NB |
2261 | /* |
2262 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2263 | */ | |
5951146d | 2264 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2265 | se_sess); |
6708bb27 AG |
2266 | if (!pr_reg) { |
2267 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2268 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
de103c93 | 2269 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2270 | } |
2271 | /* | |
2272 | * From spc4r17 Section 5.7.9: Reserving: | |
2273 | * | |
2274 | * An application client creates a persistent reservation by issuing | |
2275 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2276 | * a registered I_T nexus with the following parameters: | |
2277 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2278 | * registered with the logical unit for the I_T nexus; and | |
2279 | */ | |
2280 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2281 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2282 | " does not match existing SA REGISTER res_key:" |
2283 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
2284 | ret = TCM_RESERVATION_CONFLICT; |
2285 | goto out_put_pr_reg; | |
c66ac9db NB |
2286 | } |
2287 | /* | |
2288 | * From spc4r17 Section 5.7.9: Reserving: | |
2289 | * | |
2290 | * From above: | |
2291 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2292 | * being created. | |
2293 | * | |
2294 | * Only one persistent reservation is allowed at a time per logical unit | |
2295 | * and that persistent reservation has a scope of LU_SCOPE. | |
2296 | */ | |
2297 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2298 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
de103c93 CH |
2299 | ret = TCM_INVALID_PARAMETER_LIST; |
2300 | goto out_put_pr_reg; | |
c66ac9db NB |
2301 | } |
2302 | /* | |
2303 | * See if we have an existing PR reservation holder pointer at | |
2304 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2305 | * *pr_res_holder. | |
2306 | */ | |
2307 | spin_lock(&dev->dev_reservation_lock); | |
2308 | pr_res_holder = dev->dev_pr_res_holder; | |
ee1b1b9c | 2309 | if (pr_res_holder) { |
c66ac9db NB |
2310 | /* |
2311 | * From spc4r17 Section 5.7.9: Reserving: | |
2312 | * | |
2313 | * If the device server receives a PERSISTENT RESERVE OUT | |
2314 | * command from an I_T nexus other than a persistent reservation | |
2315 | * holder (see 5.7.10) that attempts to create a persistent | |
2316 | * reservation when a persistent reservation already exists for | |
2317 | * the logical unit, then the command shall be completed with | |
2318 | * RESERVATION CONFLICT status. | |
2319 | */ | |
e673dc92 | 2320 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2321 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
6708bb27 | 2322 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2323 | " [%s]: %s while reservation already held by" |
2324 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2325 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2326 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2327 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2328 | pr_res_holder->pr_reg_nacl->initiatorname); |
2329 | ||
2330 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2331 | ret = TCM_RESERVATION_CONFLICT; |
2332 | goto out_put_pr_reg; | |
c66ac9db NB |
2333 | } |
2334 | /* | |
2335 | * From spc4r17 Section 5.7.9: Reserving: | |
2336 | * | |
2337 | * If a persistent reservation holder attempts to modify the | |
2338 | * type or scope of an existing persistent reservation, the | |
2339 | * command shall be completed with RESERVATION CONFLICT status. | |
2340 | */ | |
2341 | if ((pr_res_holder->pr_res_type != type) || | |
2342 | (pr_res_holder->pr_res_scope != scope)) { | |
2343 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2344 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2345 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2346 | " while reservation already held by [%s]: %s," | |
2347 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2348 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2349 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2350 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2351 | pr_res_holder->pr_reg_nacl->initiatorname); |
2352 | ||
2353 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2354 | ret = TCM_RESERVATION_CONFLICT; |
2355 | goto out_put_pr_reg; | |
c66ac9db NB |
2356 | } |
2357 | /* | |
2358 | * From spc4r17 Section 5.7.9: Reserving: | |
2359 | * | |
2360 | * If the device server receives a PERSISTENT RESERVE OUT | |
2361 | * command with RESERVE service action where the TYPE field and | |
2362 | * the SCOPE field contain the same values as the existing type | |
2363 | * and scope from a persistent reservation holder, it shall not | |
2364 | * make any change to the existing persistent reservation and | |
2365 | * shall completethe command with GOOD status. | |
2366 | */ | |
2367 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2368 | ret = 0; |
2369 | goto out_put_pr_reg; | |
c66ac9db NB |
2370 | } |
2371 | /* | |
2372 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2373 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2374 | */ | |
2375 | pr_reg->pr_res_scope = scope; | |
2376 | pr_reg->pr_res_type = type; | |
2377 | pr_reg->pr_res_holder = 1; | |
2378 | dev->dev_pr_res_holder = pr_reg; | |
d2843c17 | 2379 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2380 | |
6708bb27 | 2381 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2382 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2383 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2384 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2385 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2386 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2387 | se_sess->se_node_acl->initiatorname, |
d2843c17 | 2388 | i_buf); |
c66ac9db NB |
2389 | spin_unlock(&dev->dev_reservation_lock); |
2390 | ||
459f213b AG |
2391 | if (pr_tmpl->pr_aptpl_active) |
2392 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db | 2393 | |
de103c93 CH |
2394 | ret = 0; |
2395 | out_put_pr_reg: | |
c66ac9db | 2396 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2397 | return ret; |
c66ac9db NB |
2398 | } |
2399 | ||
de103c93 CH |
2400 | static sense_reason_t |
2401 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, | |
2402 | u64 res_key) | |
c66ac9db | 2403 | { |
c66ac9db NB |
2404 | switch (type) { |
2405 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2406 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2407 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2408 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2409 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2410 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 2411 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
c66ac9db | 2412 | default: |
6708bb27 | 2413 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2414 | " 0x%02x\n", type); |
de103c93 | 2415 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 2416 | } |
c66ac9db NB |
2417 | } |
2418 | ||
2419 | /* | |
2420 | * Called with struct se_device->dev_reservation_lock held. | |
2421 | */ | |
2422 | static void __core_scsi3_complete_pro_release( | |
2423 | struct se_device *dev, | |
2424 | struct se_node_acl *se_nacl, | |
2425 | struct t10_pr_registration *pr_reg, | |
6c3c9baa NB |
2426 | int explicit, |
2427 | int unreg) | |
c66ac9db | 2428 | { |
9ac8928e | 2429 | const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2430 | char i_buf[PR_REG_ISID_ID_LEN]; |
6c3c9baa | 2431 | int pr_res_type = 0, pr_res_scope = 0; |
c66ac9db NB |
2432 | |
2433 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2434 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
2435 | /* |
2436 | * Go ahead and release the current PR reservation holder. | |
6c3c9baa NB |
2437 | * If an All Registrants reservation is currently active and |
2438 | * a unregister operation is requested, replace the current | |
2439 | * dev_pr_res_holder with another active registration. | |
2440 | */ | |
2441 | if (dev->dev_pr_res_holder) { | |
2442 | pr_res_type = dev->dev_pr_res_holder->pr_res_type; | |
2443 | pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; | |
2444 | dev->dev_pr_res_holder->pr_res_type = 0; | |
2445 | dev->dev_pr_res_holder->pr_res_scope = 0; | |
2446 | dev->dev_pr_res_holder->pr_res_holder = 0; | |
2447 | dev->dev_pr_res_holder = NULL; | |
2448 | } | |
2449 | if (!unreg) | |
2450 | goto out; | |
c66ac9db | 2451 | |
6c3c9baa NB |
2452 | spin_lock(&dev->t10_pr.registration_lock); |
2453 | list_del_init(&pr_reg->pr_reg_list); | |
2454 | /* | |
2455 | * If the I_T nexus is a reservation holder, the persistent reservation | |
2456 | * is of an all registrants type, and the I_T nexus is the last remaining | |
2457 | * registered I_T nexus, then the device server shall also release the | |
2458 | * persistent reservation. | |
2459 | */ | |
2460 | if (!list_empty(&dev->t10_pr.registration_list) && | |
2461 | ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2462 | (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { | |
2463 | dev->dev_pr_res_holder = | |
2464 | list_entry(dev->t10_pr.registration_list.next, | |
2465 | struct t10_pr_registration, pr_reg_list); | |
2466 | dev->dev_pr_res_holder->pr_res_type = pr_res_type; | |
2467 | dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; | |
2468 | dev->dev_pr_res_holder->pr_res_holder = 1; | |
2469 | } | |
2470 | spin_unlock(&dev->t10_pr.registration_lock); | |
2471 | out: | |
2472 | if (!dev->dev_pr_res_holder) { | |
2473 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" | |
2474 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2475 | tfo->get_fabric_name(), (explicit) ? "explicit" : | |
2476 | "implicit", core_scsi3_pr_dump_type(pr_res_type), | |
2477 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2478 | } | |
6708bb27 | 2479 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db | 2480 | tfo->get_fabric_name(), se_nacl->initiatorname, |
d2843c17 | 2481 | i_buf); |
c66ac9db NB |
2482 | /* |
2483 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2484 | */ | |
2485 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2486 | } | |
2487 | ||
de103c93 CH |
2488 | static sense_reason_t |
2489 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, | |
2490 | u64 res_key) | |
c66ac9db NB |
2491 | { |
2492 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2493 | struct se_session *se_sess = cmd->se_sess; |
2494 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2495 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
0fd97ccf | 2496 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
de103c93 | 2497 | sense_reason_t ret = 0; |
c66ac9db | 2498 | |
6708bb27 AG |
2499 | if (!se_sess || !se_lun) { |
2500 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2501 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2502 | } |
2503 | /* | |
2504 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2505 | */ | |
2506 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2507 | if (!pr_reg) { |
2508 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2509 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
de103c93 | 2510 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2511 | } |
2512 | /* | |
2513 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2514 | * | |
2515 | * If there is no persistent reservation or in response to a persistent | |
2516 | * reservation release request from a registered I_T nexus that is not a | |
2517 | * persistent reservation holder (see 5.7.10), the device server shall | |
2518 | * do the following: | |
2519 | * | |
2520 | * a) Not release the persistent reservation, if any; | |
2521 | * b) Not remove any registrations; and | |
2522 | * c) Complete the command with GOOD status. | |
2523 | */ | |
2524 | spin_lock(&dev->dev_reservation_lock); | |
2525 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2526 | if (!pr_res_holder) { |
c66ac9db NB |
2527 | /* |
2528 | * No persistent reservation, return GOOD status. | |
2529 | */ | |
2530 | spin_unlock(&dev->dev_reservation_lock); | |
bb7a8c8e | 2531 | goto out_put_pr_reg; |
c66ac9db | 2532 | } |
c66ac9db | 2533 | |
e673dc92 | 2534 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2535 | /* |
c66ac9db NB |
2536 | * Release request from a registered I_T nexus that is not a |
2537 | * persistent reservation holder. return GOOD status. | |
2538 | */ | |
2539 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 2540 | goto out_put_pr_reg; |
c66ac9db | 2541 | } |
de103c93 | 2542 | |
c66ac9db NB |
2543 | /* |
2544 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2545 | * | |
2546 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2547 | * release a persistent reservation. | |
2548 | * | |
2549 | * An application client releases the persistent reservation by issuing | |
2550 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2551 | * an I_T nexus that is a persistent reservation holder with the | |
2552 | * following parameters: | |
2553 | * | |
2554 | * a) RESERVATION KEY field set to the value of the reservation key | |
2555 | * that is registered with the logical unit for the I_T nexus; | |
2556 | */ | |
2557 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2558 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2559 | " does not match existing SA REGISTER res_key:" |
2560 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2561 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2562 | ret = TCM_RESERVATION_CONFLICT; |
2563 | goto out_put_pr_reg; | |
c66ac9db NB |
2564 | } |
2565 | /* | |
2566 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2567 | * | |
2568 | * b) TYPE field and SCOPE field set to match the persistent | |
2569 | * reservation being released. | |
2570 | */ | |
2571 | if ((pr_res_holder->pr_res_type != type) || | |
2572 | (pr_res_holder->pr_res_scope != scope)) { | |
2573 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2574 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2575 | " reservation from [%s]: %s with different TYPE " |
2576 | "and/or SCOPE while reservation already held by" | |
2577 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2578 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2579 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2580 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2581 | pr_res_holder->pr_reg_nacl->initiatorname); |
2582 | ||
2583 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2584 | ret = TCM_RESERVATION_CONFLICT; |
2585 | goto out_put_pr_reg; | |
c66ac9db NB |
2586 | } |
2587 | /* | |
2588 | * In response to a persistent reservation release request from the | |
2589 | * persistent reservation holder the device server shall perform a | |
2590 | * release by doing the following as an uninterrupted series of actions: | |
2591 | * a) Release the persistent reservation; | |
2592 | * b) Not remove any registration(s); | |
2593 | * c) If the released persistent reservation is a registrants only type | |
2594 | * or all registrants type persistent reservation, | |
2595 | * the device server shall establish a unit attention condition for | |
2596 | * the initiator port associated with every regis- | |
2597 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2598 | * RESERVE OUT command with RELEASE service action was received, | |
2599 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2600 | * d) If the persistent reservation is of any other type, the device | |
2601 | * server shall not establish a unit attention condition. | |
2602 | */ | |
2603 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
6c3c9baa | 2604 | pr_reg, 1, 0); |
c66ac9db NB |
2605 | |
2606 | spin_unlock(&dev->dev_reservation_lock); | |
2607 | ||
2608 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2609 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2610 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2611 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2612 | /* | |
2613 | * If no UNIT ATTENTION conditions will be established for | |
2614 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2615 | * go ahead and check for APTPL=1 update+write below | |
2616 | */ | |
2617 | goto write_aptpl; | |
2618 | } | |
2619 | ||
2620 | spin_lock(&pr_tmpl->registration_lock); | |
2621 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2622 | pr_reg_list) { | |
2623 | /* | |
2624 | * Do not establish a UNIT ATTENTION condition | |
2625 | * for the calling I_T Nexus | |
2626 | */ | |
2627 | if (pr_reg_p == pr_reg) | |
2628 | continue; | |
2629 | ||
2630 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2631 | pr_reg_p->pr_res_mapped_lun, | |
2632 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2633 | } | |
2634 | spin_unlock(&pr_tmpl->registration_lock); | |
2635 | ||
2636 | write_aptpl: | |
459f213b AG |
2637 | if (pr_tmpl->pr_aptpl_active) |
2638 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
2639 | ||
de103c93 | 2640 | out_put_pr_reg: |
c66ac9db | 2641 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2642 | return ret; |
c66ac9db NB |
2643 | } |
2644 | ||
de103c93 CH |
2645 | static sense_reason_t |
2646 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) | |
c66ac9db NB |
2647 | { |
2648 | struct se_device *dev = cmd->se_dev; | |
2649 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 2650 | struct se_session *se_sess = cmd->se_sess; |
0fd97ccf | 2651 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
2652 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2653 | u32 pr_res_mapped_lun = 0; | |
2654 | int calling_it_nexus = 0; | |
2655 | /* | |
2656 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2657 | */ | |
5951146d | 2658 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2659 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2660 | if (!pr_reg_n) { |
2661 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2662 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
de103c93 | 2663 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2664 | } |
2665 | /* | |
2666 | * From spc4r17 section 5.7.11.6, Clearing: | |
2667 | * | |
2668 | * Any application client may release the persistent reservation and | |
2669 | * remove all registrations from a device server by issuing a | |
2670 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2671 | * registered I_T nexus with the following parameter: | |
2672 | * | |
2673 | * a) RESERVATION KEY field set to the value of the reservation key | |
2674 | * that is registered with the logical unit for the I_T nexus. | |
2675 | */ | |
2676 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2677 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2678 | " res_key: 0x%016Lx does not match" |
2679 | " existing SA REGISTER res_key:" | |
2680 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2681 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2682 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2683 | } |
2684 | /* | |
2685 | * a) Release the persistent reservation, if any; | |
2686 | */ | |
2687 | spin_lock(&dev->dev_reservation_lock); | |
2688 | pr_res_holder = dev->dev_pr_res_holder; | |
2689 | if (pr_res_holder) { | |
2690 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2691 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 2692 | pr_res_holder, 0, 0); |
c66ac9db NB |
2693 | } |
2694 | spin_unlock(&dev->dev_reservation_lock); | |
2695 | /* | |
2696 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2697 | */ | |
2698 | spin_lock(&pr_tmpl->registration_lock); | |
2699 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2700 | &pr_tmpl->registration_list, pr_reg_list) { | |
2701 | ||
2702 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2703 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2704 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2705 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2706 | calling_it_nexus); | |
2707 | /* | |
2708 | * e) Establish a unit attention condition for the initiator | |
2709 | * port associated with every registered I_T nexus other | |
2710 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2711 | * command with CLEAR service action was received, with the | |
2712 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2713 | */ | |
6708bb27 | 2714 | if (!calling_it_nexus) |
c66ac9db NB |
2715 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2716 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2717 | } | |
2718 | spin_unlock(&pr_tmpl->registration_lock); | |
2719 | ||
6708bb27 | 2720 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2721 | cmd->se_tfo->get_fabric_name()); |
c66ac9db | 2722 | |
459f213b | 2723 | core_scsi3_update_and_write_aptpl(cmd->se_dev, false); |
c66ac9db NB |
2724 | |
2725 | core_scsi3_pr_generation(dev); | |
2726 | return 0; | |
2727 | } | |
2728 | ||
2729 | /* | |
2730 | * Called with struct se_device->dev_reservation_lock held. | |
2731 | */ | |
2732 | static void __core_scsi3_complete_pro_preempt( | |
2733 | struct se_device *dev, | |
2734 | struct t10_pr_registration *pr_reg, | |
2735 | struct list_head *preempt_and_abort_list, | |
2736 | int type, | |
2737 | int scope, | |
33ce6a87 | 2738 | enum preempt_type preempt_type) |
c66ac9db NB |
2739 | { |
2740 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
9ac8928e | 2741 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2742 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
2743 | |
2744 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2745 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2746 | /* |
125d0119 | 2747 | * Do an implicit RELEASE of the existing reservation. |
c66ac9db NB |
2748 | */ |
2749 | if (dev->dev_pr_res_holder) | |
2750 | __core_scsi3_complete_pro_release(dev, nacl, | |
6c3c9baa | 2751 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
2752 | |
2753 | dev->dev_pr_res_holder = pr_reg; | |
2754 | pr_reg->pr_res_holder = 1; | |
2755 | pr_reg->pr_res_type = type; | |
2756 | pr_reg->pr_res_scope = scope; | |
2757 | ||
6708bb27 | 2758 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db | 2759 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
33ce6a87 | 2760 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
c66ac9db NB |
2761 | core_scsi3_pr_dump_type(type), |
2762 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2763 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
33ce6a87 | 2764 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
d2843c17 | 2765 | nacl->initiatorname, i_buf); |
c66ac9db NB |
2766 | /* |
2767 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2768 | * struct t10_pr_registration to the list that will be compared | |
2769 | * against received CDBs.. | |
2770 | */ | |
2771 | if (preempt_and_abort_list) | |
2772 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2773 | preempt_and_abort_list); | |
2774 | } | |
2775 | ||
2776 | static void core_scsi3_release_preempt_and_abort( | |
2777 | struct list_head *preempt_and_abort_list, | |
2778 | struct t10_pr_registration *pr_reg_holder) | |
2779 | { | |
2780 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2781 | ||
2782 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2783 | pr_reg_abort_list) { | |
2784 | ||
2785 | list_del(&pr_reg->pr_reg_abort_list); | |
2786 | if (pr_reg_holder == pr_reg) | |
2787 | continue; | |
2788 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2789 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2790 | continue; |
2791 | } | |
2792 | ||
2793 | pr_reg->pr_reg_deve = NULL; | |
2794 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
2795 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
2796 | } | |
2797 | } | |
2798 | ||
de103c93 CH |
2799 | static sense_reason_t |
2800 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, | |
33ce6a87 | 2801 | u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 2802 | { |
5951146d | 2803 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2804 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2805 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2806 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2807 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
0fd97ccf | 2808 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2809 | u32 pr_res_mapped_lun = 0; |
b6932ee3 SA |
2810 | int all_reg = 0, calling_it_nexus = 0; |
2811 | bool sa_res_key_unmatched = sa_res_key != 0; | |
de103c93 | 2812 | int prh_type = 0, prh_scope = 0; |
c66ac9db | 2813 | |
de103c93 CH |
2814 | if (!se_sess) |
2815 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2816 | |
5951146d | 2817 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2818 | se_sess); |
6708bb27 AG |
2819 | if (!pr_reg_n) { |
2820 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2821 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
33ce6a87 | 2822 | (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); |
de103c93 | 2823 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2824 | } |
2825 | if (pr_reg_n->pr_res_key != res_key) { | |
2826 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2827 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2828 | } |
2829 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2830 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2831 | core_scsi3_put_pr_reg(pr_reg_n); |
de103c93 | 2832 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 2833 | } |
c66ac9db NB |
2834 | |
2835 | spin_lock(&dev->dev_reservation_lock); | |
2836 | pr_res_holder = dev->dev_pr_res_holder; | |
2837 | if (pr_res_holder && | |
2838 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2839 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2840 | all_reg = 1; | |
2841 | ||
6708bb27 | 2842 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
2843 | spin_unlock(&dev->dev_reservation_lock); |
2844 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2845 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2846 | } |
2847 | /* | |
2848 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
2849 | * | |
2850 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
2851 | * persistent reservation holder or there is no persistent reservation | |
2852 | * holder (i.e., there is no persistent reservation), then the device | |
2853 | * server shall perform a preempt by doing the following in an | |
2854 | * uninterrupted series of actions. (See below..) | |
2855 | */ | |
6708bb27 | 2856 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
2857 | /* |
2858 | * No existing or SA Reservation Key matching reservations.. | |
2859 | * | |
2860 | * PROUT SA PREEMPT with All Registrant type reservations are | |
2861 | * allowed to be processed without a matching SA Reservation Key | |
2862 | */ | |
2863 | spin_lock(&pr_tmpl->registration_lock); | |
2864 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2865 | &pr_tmpl->registration_list, pr_reg_list) { | |
2866 | /* | |
2867 | * Removing of registrations in non all registrants | |
2868 | * type reservations without a matching SA reservation | |
2869 | * key. | |
2870 | * | |
2871 | * a) Remove the registrations for all I_T nexuses | |
2872 | * specified by the SERVICE ACTION RESERVATION KEY | |
2873 | * field; | |
2874 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
2875 | * c) Process tasks as defined in 5.7.1; and | |
2876 | * d) Establish a unit attention condition for the | |
2877 | * initiator port associated with every I_T nexus | |
2878 | * that lost its registration other than the I_T | |
2879 | * nexus on which the PERSISTENT RESERVE OUT command | |
2880 | * was received, with the additional sense code set | |
2881 | * to REGISTRATIONS PREEMPTED. | |
2882 | */ | |
6708bb27 | 2883 | if (!all_reg) { |
c66ac9db NB |
2884 | if (pr_reg->pr_res_key != sa_res_key) |
2885 | continue; | |
b6932ee3 | 2886 | sa_res_key_unmatched = false; |
c66ac9db NB |
2887 | |
2888 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2889 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2890 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2891 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2892 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2893 | NULL, calling_it_nexus); |
c66ac9db NB |
2894 | } else { |
2895 | /* | |
2896 | * Case for any existing all registrants type | |
2897 | * reservation, follow logic in spc4r17 section | |
2898 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
2899 | * | |
2900 | * For a ZERO SA Reservation key, release | |
125d0119 | 2901 | * all other registrations and do an implicit |
c66ac9db NB |
2902 | * release of active persistent reservation. |
2903 | * | |
2904 | * For a non-ZERO SA Reservation key, only | |
2905 | * release the matching reservation key from | |
2906 | * registrations. | |
2907 | */ | |
2908 | if ((sa_res_key) && | |
2909 | (pr_reg->pr_res_key != sa_res_key)) | |
2910 | continue; | |
b6932ee3 | 2911 | sa_res_key_unmatched = false; |
c66ac9db NB |
2912 | |
2913 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2914 | if (calling_it_nexus) | |
2915 | continue; | |
2916 | ||
2917 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2918 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2919 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2920 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2921 | NULL, 0); |
c66ac9db | 2922 | } |
6708bb27 | 2923 | if (!calling_it_nexus) |
c66ac9db NB |
2924 | core_scsi3_ua_allocate(pr_reg_nacl, |
2925 | pr_res_mapped_lun, 0x2A, | |
9e08e34e | 2926 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
2927 | } |
2928 | spin_unlock(&pr_tmpl->registration_lock); | |
2929 | /* | |
2930 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
2931 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
2932 | * RESERVATION KEY field to a value that does not match any | |
2933 | * registered reservation key, then the device server shall | |
2934 | * complete the command with RESERVATION CONFLICT status. | |
2935 | */ | |
b6932ee3 | 2936 | if (sa_res_key_unmatched) { |
c66ac9db NB |
2937 | spin_unlock(&dev->dev_reservation_lock); |
2938 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2939 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2940 | } |
2941 | /* | |
2942 | * For an existing all registrants type reservation | |
2943 | * with a zero SA rservation key, preempt the existing | |
2944 | * reservation with the new PR type and scope. | |
2945 | */ | |
2946 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
2947 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
2948 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
2949 | type, scope, preempt_type); | |
c66ac9db | 2950 | |
33ce6a87 | 2951 | if (preempt_type == PREEMPT_AND_ABORT) |
c66ac9db NB |
2952 | core_scsi3_release_preempt_and_abort( |
2953 | &preempt_and_abort_list, pr_reg_n); | |
2954 | } | |
2955 | spin_unlock(&dev->dev_reservation_lock); | |
2956 | ||
459f213b AG |
2957 | if (pr_tmpl->pr_aptpl_active) |
2958 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
2959 | |
2960 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 2961 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
2962 | return 0; |
2963 | } | |
2964 | /* | |
2965 | * The PREEMPTing SA reservation key matches that of the | |
2966 | * existing persistent reservation, first, we check if | |
2967 | * we are preempting our own reservation. | |
2968 | * From spc4r17, section 5.7.11.4.3 Preempting | |
2969 | * persistent reservations and registration handling | |
2970 | * | |
2971 | * If an all registrants persistent reservation is not | |
2972 | * present, it is not an error for the persistent | |
2973 | * reservation holder to preempt itself (i.e., a | |
2974 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
2975 | * or a PREEMPT AND ABORT service action with the | |
2976 | * SERVICE ACTION RESERVATION KEY value equal to the | |
2977 | * persistent reservation holder's reservation key that | |
2978 | * is received from the persistent reservation holder). | |
2979 | * In that case, the device server shall establish the | |
2980 | * new persistent reservation and maintain the | |
2981 | * registration. | |
2982 | */ | |
2983 | prh_type = pr_res_holder->pr_res_type; | |
2984 | prh_scope = pr_res_holder->pr_res_scope; | |
2985 | /* | |
2986 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
2987 | * persistent reservation holder (see 5.7.10), the device | |
2988 | * server shall perform a preempt by doing the following as | |
2989 | * an uninterrupted series of actions: | |
2990 | * | |
2991 | * a) Release the persistent reservation for the holder | |
2992 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
2993 | */ | |
2994 | if (pr_reg_n != pr_res_holder) | |
2995 | __core_scsi3_complete_pro_release(dev, | |
6c3c9baa NB |
2996 | pr_res_holder->pr_reg_nacl, |
2997 | dev->dev_pr_res_holder, 0, 0); | |
c66ac9db NB |
2998 | /* |
2999 | * b) Remove the registrations for all I_T nexuses identified | |
3000 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3001 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3002 | * OUT command. If an all registrants persistent reservation | |
3003 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3004 | * is set to zero, then all registrations shall be removed | |
3005 | * except for that of the I_T nexus that is being used for | |
3006 | * the PERSISTENT RESERVE OUT command; | |
3007 | */ | |
3008 | spin_lock(&pr_tmpl->registration_lock); | |
3009 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3010 | &pr_tmpl->registration_list, pr_reg_list) { | |
3011 | ||
3012 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3013 | if (calling_it_nexus) | |
3014 | continue; | |
3015 | ||
3016 | if (pr_reg->pr_res_key != sa_res_key) | |
3017 | continue; | |
3018 | ||
3019 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3020 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3021 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 3022 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
c66ac9db NB |
3023 | calling_it_nexus); |
3024 | /* | |
3025 | * e) Establish a unit attention condition for the initiator | |
3026 | * port associated with every I_T nexus that lost its | |
3027 | * persistent reservation and/or registration, with the | |
3028 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3029 | */ | |
3030 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3031 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3032 | } |
3033 | spin_unlock(&pr_tmpl->registration_lock); | |
3034 | /* | |
3035 | * c) Establish a persistent reservation for the preempting | |
3036 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3037 | */ | |
3038 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
3039 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
3040 | type, scope, preempt_type); | |
c66ac9db NB |
3041 | /* |
3042 | * d) Process tasks as defined in 5.7.1; | |
3043 | * e) See above.. | |
3044 | * f) If the type or scope has changed, then for every I_T nexus | |
3045 | * whose reservation key was not removed, except for the I_T | |
3046 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3047 | * received, the device server shall establish a unit | |
3048 | * attention condition for the initiator port associated with | |
3049 | * that I_T nexus, with the additional sense code set to | |
3050 | * RESERVATIONS RELEASED. If the type or scope have not | |
3051 | * changed, then no unit attention condition(s) shall be | |
3052 | * established for this reason. | |
3053 | */ | |
3054 | if ((prh_type != type) || (prh_scope != scope)) { | |
3055 | spin_lock(&pr_tmpl->registration_lock); | |
3056 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3057 | &pr_tmpl->registration_list, pr_reg_list) { | |
3058 | ||
3059 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3060 | if (calling_it_nexus) | |
3061 | continue; | |
3062 | ||
3063 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3064 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3065 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3066 | } | |
3067 | spin_unlock(&pr_tmpl->registration_lock); | |
3068 | } | |
3069 | spin_unlock(&dev->dev_reservation_lock); | |
3070 | /* | |
3071 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3072 | * All received CDBs for the matching existing reservation and | |
3073 | * registrations undergo ABORT_TASK logic. | |
3074 | * | |
3075 | * From there, core_scsi3_release_preempt_and_abort() will | |
3076 | * release every registration in the list (which have already | |
3077 | * been removed from the primary pr_reg list), except the | |
3078 | * new persistent reservation holder, the calling Initiator Port. | |
3079 | */ | |
33ce6a87 | 3080 | if (preempt_type == PREEMPT_AND_ABORT) { |
c66ac9db NB |
3081 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); |
3082 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3083 | pr_reg_n); | |
3084 | } | |
3085 | ||
459f213b AG |
3086 | if (pr_tmpl->pr_aptpl_active) |
3087 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
3088 | |
3089 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3090 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3091 | return 0; |
3092 | } | |
3093 | ||
de103c93 CH |
3094 | static sense_reason_t |
3095 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, | |
33ce6a87 | 3096 | u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 3097 | { |
c66ac9db NB |
3098 | switch (type) { |
3099 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3100 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3101 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3102 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3103 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3104 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 3105 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
33ce6a87 | 3106 | sa_res_key, preempt_type); |
c66ac9db | 3107 | default: |
6708bb27 | 3108 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
33ce6a87 | 3109 | " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); |
de103c93 | 3110 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 3111 | } |
c66ac9db NB |
3112 | } |
3113 | ||
3114 | ||
de103c93 CH |
3115 | static sense_reason_t |
3116 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, | |
3117 | u64 sa_res_key, int aptpl, int unreg) | |
c66ac9db | 3118 | { |
e3d6f909 | 3119 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3120 | struct se_device *dev = cmd->se_dev; |
28168905 | 3121 | struct se_dev_entry *dest_se_deve = NULL; |
e3d6f909 | 3122 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3123 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3124 | struct se_port *se_port; | |
3125 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
9ac8928e | 3126 | const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; |
c66ac9db | 3127 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; |
0fd97ccf | 3128 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3129 | unsigned char *buf; |
2650d71e | 3130 | const unsigned char *initiator_str; |
13ba564c | 3131 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 3132 | u32 tid_len, tmp_tid_len; |
d2843c17 | 3133 | int new_reg = 0, type, scope, matching_iname; |
de103c93 | 3134 | sense_reason_t ret; |
c66ac9db NB |
3135 | unsigned short rtpi; |
3136 | unsigned char proto_ident; | |
3137 | ||
6708bb27 AG |
3138 | if (!se_sess || !se_lun) { |
3139 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 3140 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 3141 | } |
de103c93 | 3142 | |
c66ac9db NB |
3143 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
3144 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3145 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3146 | /* |
3147 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3148 | * Register behaviors for a REGISTER AND MOVE service action | |
3149 | * | |
3150 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3151 | */ | |
5951146d | 3152 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3153 | se_sess); |
6708bb27 AG |
3154 | if (!pr_reg) { |
3155 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3156 | " *pr_reg for REGISTER_AND_MOVE\n"); |
de103c93 | 3157 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3158 | } |
3159 | /* | |
3160 | * The provided reservation key much match the existing reservation key | |
3161 | * provided during this initiator's I_T nexus registration. | |
3162 | */ | |
3163 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3164 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3165 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3166 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
3167 | ret = TCM_RESERVATION_CONFLICT; |
3168 | goto out_put_pr_reg; | |
c66ac9db NB |
3169 | } |
3170 | /* | |
3171 | * The service active reservation key needs to be non zero | |
3172 | */ | |
6708bb27 AG |
3173 | if (!sa_res_key) { |
3174 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db | 3175 | " sa_res_key\n"); |
de103c93 CH |
3176 | ret = TCM_INVALID_PARAMETER_LIST; |
3177 | goto out_put_pr_reg; | |
c66ac9db | 3178 | } |
05d1c7c0 | 3179 | |
c66ac9db NB |
3180 | /* |
3181 | * Determine the Relative Target Port Identifier where the reservation | |
3182 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3183 | * information. | |
3184 | */ | |
4949314c | 3185 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3186 | if (!buf) { |
3187 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3188 | goto out_put_pr_reg; | |
3189 | } | |
3190 | ||
c66ac9db NB |
3191 | rtpi = (buf[18] & 0xff) << 8; |
3192 | rtpi |= buf[19] & 0xff; | |
3193 | tid_len = (buf[20] & 0xff) << 24; | |
3194 | tid_len |= (buf[21] & 0xff) << 16; | |
3195 | tid_len |= (buf[22] & 0xff) << 8; | |
3196 | tid_len |= buf[23] & 0xff; | |
4949314c | 3197 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3198 | buf = NULL; |
c66ac9db NB |
3199 | |
3200 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3201 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3202 | " does not equal CDB data_length: %u\n", tid_len, |
3203 | cmd->data_length); | |
de103c93 CH |
3204 | ret = TCM_INVALID_PARAMETER_LIST; |
3205 | goto out_put_pr_reg; | |
c66ac9db NB |
3206 | } |
3207 | ||
3208 | spin_lock(&dev->se_port_lock); | |
3209 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3210 | if (se_port->sep_rtpi != rtpi) | |
3211 | continue; | |
3212 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3213 | if (!dest_se_tpg) |
c66ac9db | 3214 | continue; |
e3d6f909 | 3215 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3216 | if (!dest_tf_ops) |
c66ac9db NB |
3217 | continue; |
3218 | ||
33940d09 | 3219 | atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); |
c66ac9db NB |
3220 | spin_unlock(&dev->se_port_lock); |
3221 | ||
de103c93 | 3222 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
6708bb27 | 3223 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db | 3224 | " for dest_se_tpg\n"); |
33940d09 | 3225 | atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); |
de103c93 CH |
3226 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3227 | goto out_put_pr_reg; | |
c66ac9db NB |
3228 | } |
3229 | ||
3230 | spin_lock(&dev->se_port_lock); | |
3231 | break; | |
3232 | } | |
3233 | spin_unlock(&dev->se_port_lock); | |
3234 | ||
6708bb27 AG |
3235 | if (!dest_se_tpg || !dest_tf_ops) { |
3236 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3237 | " fabric ops from Relative Target Port Identifier:" |
3238 | " %hu\n", rtpi); | |
de103c93 CH |
3239 | ret = TCM_INVALID_PARAMETER_LIST; |
3240 | goto out_put_pr_reg; | |
c66ac9db | 3241 | } |
05d1c7c0 | 3242 | |
4949314c | 3243 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3244 | if (!buf) { |
3245 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3246 | goto out_put_pr_reg; | |
3247 | } | |
c66ac9db | 3248 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3249 | |
6708bb27 | 3250 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3251 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3252 | |
2aeeafae | 3253 | if (proto_ident != dest_se_tpg->proto_id) { |
6708bb27 | 3254 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3255 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3256 | " from fabric: %s\n", proto_ident, | |
2aeeafae | 3257 | dest_se_tpg->proto_id, |
c66ac9db | 3258 | dest_tf_ops->get_fabric_name()); |
de103c93 | 3259 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3260 | goto out; |
3261 | } | |
2650d71e | 3262 | initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, |
c66ac9db | 3263 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); |
6708bb27 AG |
3264 | if (!initiator_str) { |
3265 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3266 | " initiator_str from Transport ID\n"); |
de103c93 | 3267 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3268 | goto out; |
3269 | } | |
3270 | ||
4949314c | 3271 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3272 | buf = NULL; |
3273 | ||
6708bb27 | 3274 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3275 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3276 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3277 | iport_ptr : ""); | |
3278 | /* | |
3279 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3280 | * action specifies a TransportID that is the same as the initiator port | |
3281 | * of the I_T nexus for the command received, then the command shall | |
3282 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3283 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3284 | * IN PARAMETER LIST. | |
3285 | */ | |
3286 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3287 | matching_iname = (!strcmp(initiator_str, | |
3288 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3289 | if (!matching_iname) |
c66ac9db NB |
3290 | goto after_iport_check; |
3291 | ||
6708bb27 AG |
3292 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3293 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3294 | " matches: %s on received I_T Nexus\n", initiator_str, |
3295 | pr_reg_nacl->initiatorname); | |
de103c93 | 3296 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3297 | goto out; |
3298 | } | |
6708bb27 AG |
3299 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3300 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3301 | " matches: %s %s on received I_T Nexus\n", |
3302 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3303 | pr_reg->pr_reg_isid); | |
de103c93 | 3304 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3305 | goto out; |
3306 | } | |
3307 | after_iport_check: | |
3308 | /* | |
3309 | * Locate the destination struct se_node_acl from the received Transport ID | |
3310 | */ | |
403edd78 | 3311 | mutex_lock(&dest_se_tpg->acl_node_mutex); |
c66ac9db NB |
3312 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3313 | initiator_str); | |
33940d09 JE |
3314 | if (dest_node_acl) |
3315 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 3316 | mutex_unlock(&dest_se_tpg->acl_node_mutex); |
c66ac9db | 3317 | |
6708bb27 AG |
3318 | if (!dest_node_acl) { |
3319 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3320 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3321 | initiator_str); | |
de103c93 | 3322 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3323 | goto out; |
3324 | } | |
de103c93 CH |
3325 | |
3326 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { | |
6708bb27 | 3327 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db | 3328 | " dest_node_acl\n"); |
33940d09 | 3329 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 3330 | dest_node_acl = NULL; |
de103c93 | 3331 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3332 | goto out; |
3333 | } | |
8b1e1244 | 3334 | |
6708bb27 | 3335 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3336 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3337 | dest_node_acl->initiatorname); | |
8b1e1244 | 3338 | |
c66ac9db NB |
3339 | /* |
3340 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3341 | * PORT IDENTIFIER. | |
3342 | */ | |
3343 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3344 | if (!dest_se_deve) { |
3345 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3346 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
de103c93 | 3347 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3348 | goto out; |
3349 | } | |
3350 | ||
de103c93 | 3351 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 3352 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
29a05dee | 3353 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db | 3354 | dest_se_deve = NULL; |
de103c93 | 3355 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3356 | goto out; |
3357 | } | |
8b1e1244 | 3358 | |
6708bb27 | 3359 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3360 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3361 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3362 | dest_se_deve->mapped_lun); | |
8b1e1244 | 3363 | |
c66ac9db NB |
3364 | /* |
3365 | * A persistent reservation needs to already existing in order to | |
3366 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3367 | */ | |
3368 | spin_lock(&dev->dev_reservation_lock); | |
3369 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3370 | if (!pr_res_holder) { |
3371 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3372 | " currently held\n"); |
3373 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3374 | ret = TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3375 | goto out; |
3376 | } | |
3377 | /* | |
3378 | * The received on I_T Nexus must be the reservation holder. | |
3379 | * | |
3380 | * From spc4r17 section 5.7.8 Table 50 -- | |
3381 | * Register behaviors for a REGISTER AND MOVE service action | |
3382 | */ | |
e673dc92 | 3383 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
6708bb27 | 3384 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3385 | " Nexus is not reservation holder\n"); |
3386 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3387 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3388 | goto out; |
3389 | } | |
3390 | /* | |
3391 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3392 | * | |
3393 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3394 | * action is received and the established persistent reservation is a | |
3395 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3396 | * All Registrants type reservation, then the command shall be completed | |
3397 | * with RESERVATION CONFLICT status. | |
3398 | */ | |
3399 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3400 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3401 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3402 | " reservation for type: %s\n", |
3403 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3404 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3405 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3406 | goto out; |
3407 | } | |
3408 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3409 | /* | |
3410 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3411 | */ | |
3412 | type = pr_res_holder->pr_res_type; | |
3413 | scope = pr_res_holder->pr_res_type; | |
3414 | /* | |
3415 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3416 | * RESERVATION KEY field with the I_T nexus specified as the | |
3417 | * destination of the register and move, where: | |
3418 | * A) The I_T nexus is specified by the TransportID and the | |
3419 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3420 | * B) Regardless of the TransportID format used, the association for | |
3421 | * the initiator port is based on either the initiator port name | |
3422 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3423 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3424 | * transport protocols where port names are not required; | |
3425 | * d) Register the reservation key specified in the SERVICE ACTION | |
3426 | * RESERVATION KEY field; | |
3427 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3428 | * RESERVATION KEY field and associated information; | |
3429 | * | |
3430 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3431 | * register an I_T nexus that is already registered with the same | |
3432 | * reservation key or a different reservation key. | |
3433 | */ | |
3434 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3435 | iport_ptr); | |
6708bb27 | 3436 | if (!dest_pr_reg) { |
79dc9c9e NB |
3437 | struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
3438 | atomic_read(&dest_se_deve->pr_kref.refcount) != 0); | |
3439 | ||
80bfdfa9 | 3440 | spin_unlock(&dev->dev_reservation_lock); |
79dc9c9e NB |
3441 | if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, |
3442 | dest_lun, dest_se_deve, dest_se_deve->mapped_lun, | |
3443 | iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { | |
de103c93 | 3444 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3445 | goto out; |
3446 | } | |
80bfdfa9 | 3447 | spin_lock(&dev->dev_reservation_lock); |
c66ac9db NB |
3448 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
3449 | iport_ptr); | |
3450 | new_reg = 1; | |
3451 | } | |
3452 | /* | |
3453 | * f) Release the persistent reservation for the persistent reservation | |
3454 | * holder (i.e., the I_T nexus on which the | |
3455 | */ | |
3456 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 3457 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
3458 | /* |
3459 | * g) Move the persistent reservation to the specified I_T nexus using | |
3460 | * the same scope and type as the persistent reservation released in | |
3461 | * item f); and | |
3462 | */ | |
3463 | dev->dev_pr_res_holder = dest_pr_reg; | |
3464 | dest_pr_reg->pr_res_holder = 1; | |
3465 | dest_pr_reg->pr_res_type = type; | |
3466 | pr_reg->pr_res_scope = scope; | |
d2843c17 | 3467 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
3468 | /* |
3469 | * Increment PRGeneration for existing registrations.. | |
3470 | */ | |
6708bb27 | 3471 | if (!new_reg) |
c66ac9db NB |
3472 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3473 | spin_unlock(&dev->dev_reservation_lock); | |
3474 | ||
6708bb27 | 3475 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3476 | " created new reservation holder TYPE: %s on object RTPI:" |
3477 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3478 | core_scsi3_pr_dump_type(type), rtpi, | |
3479 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3480 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3481 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3482 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
d2843c17 | 3483 | i_buf, dest_tf_ops->get_fabric_name(), |
c66ac9db NB |
3484 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? |
3485 | iport_ptr : ""); | |
3486 | /* | |
3487 | * It is now safe to release configfs group dependencies for destination | |
3488 | * of Transport ID Initiator Device/Port Identifier | |
3489 | */ | |
3490 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3491 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3492 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3493 | /* | |
3494 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3495 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3496 | */ | |
3497 | if (unreg) { | |
3498 | spin_lock(&pr_tmpl->registration_lock); | |
3499 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3500 | spin_unlock(&pr_tmpl->registration_lock); | |
3501 | } else | |
3502 | core_scsi3_put_pr_reg(pr_reg); | |
3503 | ||
459f213b | 3504 | core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); |
c66ac9db | 3505 | |
4949314c | 3506 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3507 | |
c66ac9db NB |
3508 | core_scsi3_put_pr_reg(dest_pr_reg); |
3509 | return 0; | |
3510 | out: | |
05d1c7c0 | 3511 | if (buf) |
4949314c | 3512 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3513 | if (dest_se_deve) |
3514 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3515 | if (dest_node_acl) | |
3516 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3517 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
de103c93 CH |
3518 | |
3519 | out_put_pr_reg: | |
c66ac9db NB |
3520 | core_scsi3_put_pr_reg(pr_reg); |
3521 | return ret; | |
3522 | } | |
3523 | ||
3524 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3525 | { | |
3526 | unsigned int __v1, __v2; | |
3527 | ||
3528 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3529 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3530 | ||
3531 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3532 | } | |
3533 | ||
3534 | /* | |
3535 | * See spc4r17 section 6.14 Table 170 | |
3536 | */ | |
de103c93 CH |
3537 | sense_reason_t |
3538 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) | |
c66ac9db | 3539 | { |
92404e60 | 3540 | struct se_device *dev = cmd->se_dev; |
617c0e06 | 3541 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3542 | unsigned char *buf; |
c66ac9db NB |
3543 | u64 res_key, sa_res_key; |
3544 | int sa, scope, type, aptpl; | |
3545 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
de103c93 | 3546 | sense_reason_t ret; |
617c0e06 CH |
3547 | |
3548 | /* | |
3549 | * Following spc2r20 5.5.1 Reservations overview: | |
3550 | * | |
3551 | * If a logical unit has been reserved by any RESERVE command and is | |
3552 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3553 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3554 | * initiator or service action and shall terminate with a RESERVATION | |
3555 | * CONFLICT status. | |
3556 | */ | |
0fd97ccf | 3557 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
617c0e06 CH |
3558 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
3559 | " SPC-2 reservation is held, returning" | |
3560 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 3561 | return TCM_RESERVATION_CONFLICT; |
617c0e06 CH |
3562 | } |
3563 | ||
c66ac9db NB |
3564 | /* |
3565 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3566 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3567 | */ | |
de103c93 CH |
3568 | if (!cmd->se_sess) |
3569 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db NB |
3570 | |
3571 | if (cmd->data_length < 24) { | |
6708bb27 | 3572 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3573 | " length too small: %u\n", cmd->data_length); |
de103c93 | 3574 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3575 | } |
de103c93 | 3576 | |
c66ac9db NB |
3577 | /* |
3578 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3579 | */ | |
3580 | sa = (cdb[1] & 0x1f); | |
3581 | scope = (cdb[2] & 0xf0); | |
3582 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3583 | |
4949314c | 3584 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3585 | if (!buf) |
3586 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3587 | ||
c66ac9db NB |
3588 | /* |
3589 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3590 | */ | |
3591 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3592 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3593 | /* | |
3594 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3595 | * SCSI TransportIDs. | |
3596 | */ | |
3597 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3598 | spec_i_pt = (buf[20] & 0x08); | |
3599 | all_tg_pt = (buf[20] & 0x04); | |
3600 | aptpl = (buf[20] & 0x01); | |
3601 | } else { | |
3602 | aptpl = (buf[17] & 0x01); | |
3603 | unreg = (buf[17] & 0x02); | |
3604 | } | |
92404e60 NB |
3605 | /* |
3606 | * If the backend device has been configured to force APTPL metadata | |
3607 | * write-out, go ahead and propigate aptpl=1 down now. | |
3608 | */ | |
3609 | if (dev->dev_attrib.force_pr_aptpl) | |
3610 | aptpl = 1; | |
3611 | ||
4949314c | 3612 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3613 | buf = NULL; |
3614 | ||
c66ac9db NB |
3615 | /* |
3616 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3617 | */ | |
de103c93 CH |
3618 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) |
3619 | return TCM_INVALID_PARAMETER_LIST; | |
d29a5b6a | 3620 | |
c66ac9db NB |
3621 | /* |
3622 | * From spc4r17 section 6.14: | |
3623 | * | |
3624 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3625 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3626 | * the command shall be terminated with CHECK CONDITION status, with | |
3627 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3628 | * code set to PARAMETER LIST LENGTH ERROR. | |
3629 | */ | |
6708bb27 | 3630 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3631 | (cmd->data_length != 24)) { |
6708bb27 | 3632 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3633 | " list length: %u\n", cmd->data_length); |
de103c93 | 3634 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3635 | } |
de103c93 | 3636 | |
c66ac9db NB |
3637 | /* |
3638 | * (core_scsi3_emulate_pro_* function parameters | |
3639 | * are defined by spc4r17 Table 174: | |
3640 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3641 | */ | |
3642 | switch (sa) { | |
3643 | case PRO_REGISTER: | |
d29a5b6a | 3644 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3645 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); |
d29a5b6a | 3646 | break; |
c66ac9db | 3647 | case PRO_RESERVE: |
d29a5b6a CH |
3648 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3649 | break; | |
c66ac9db | 3650 | case PRO_RELEASE: |
d29a5b6a CH |
3651 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3652 | break; | |
c66ac9db | 3653 | case PRO_CLEAR: |
d29a5b6a CH |
3654 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3655 | break; | |
c66ac9db | 3656 | case PRO_PREEMPT: |
d29a5b6a | 3657 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3658 | res_key, sa_res_key, PREEMPT); |
d29a5b6a | 3659 | break; |
c66ac9db | 3660 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3661 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3662 | res_key, sa_res_key, PREEMPT_AND_ABORT); |
d29a5b6a | 3663 | break; |
c66ac9db | 3664 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3665 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3666 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); |
d29a5b6a | 3667 | break; |
c66ac9db | 3668 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3669 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3670 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3671 | break; |
c66ac9db | 3672 | default: |
6708bb27 | 3673 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3674 | " action: 0x%02x\n", cdb[1] & 0x1f); |
de103c93 | 3675 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3676 | } |
3677 | ||
6bb35e00 CH |
3678 | if (!ret) |
3679 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3680 | return ret; |
c66ac9db NB |
3681 | } |
3682 | ||
3683 | /* | |
3684 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3685 | * | |
3686 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3687 | */ | |
de103c93 CH |
3688 | static sense_reason_t |
3689 | core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
c66ac9db | 3690 | { |
0fd97ccf | 3691 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3692 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3693 | unsigned char *buf; |
c66ac9db NB |
3694 | u32 add_len = 0, off = 8; |
3695 | ||
3696 | if (cmd->data_length < 8) { | |
6708bb27 | 3697 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3698 | " too small\n", cmd->data_length); |
de103c93 | 3699 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3700 | } |
3701 | ||
4949314c | 3702 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3703 | if (!buf) |
3704 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3705 | ||
0fd97ccf CH |
3706 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3707 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3708 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3709 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3710 | |
0fd97ccf CH |
3711 | spin_lock(&dev->t10_pr.registration_lock); |
3712 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
3713 | pr_reg_list) { |
3714 | /* | |
3715 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3716 | * next reservation key list descriptor. | |
3717 | */ | |
3718 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3719 | break; | |
3720 | ||
3721 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3722 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3723 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3724 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3725 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3726 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3727 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3728 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3729 | ||
3730 | add_len += 8; | |
3731 | } | |
0fd97ccf | 3732 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db NB |
3733 | |
3734 | buf[4] = ((add_len >> 24) & 0xff); | |
3735 | buf[5] = ((add_len >> 16) & 0xff); | |
3736 | buf[6] = ((add_len >> 8) & 0xff); | |
3737 | buf[7] = (add_len & 0xff); | |
3738 | ||
4949314c | 3739 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3740 | |
c66ac9db NB |
3741 | return 0; |
3742 | } | |
3743 | ||
3744 | /* | |
3745 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3746 | * | |
3747 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3748 | */ | |
de103c93 CH |
3749 | static sense_reason_t |
3750 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
c66ac9db | 3751 | { |
0fd97ccf | 3752 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3753 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3754 | unsigned char *buf; |
c66ac9db NB |
3755 | u64 pr_res_key; |
3756 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
3757 | ||
3758 | if (cmd->data_length < 8) { | |
6708bb27 | 3759 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 3760 | " too small\n", cmd->data_length); |
de103c93 | 3761 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3762 | } |
3763 | ||
4949314c | 3764 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3765 | if (!buf) |
3766 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3767 | ||
0fd97ccf CH |
3768 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3769 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3770 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3771 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3772 | |
0fd97ccf CH |
3773 | spin_lock(&dev->dev_reservation_lock); |
3774 | pr_reg = dev->dev_pr_res_holder; | |
ee1b1b9c | 3775 | if (pr_reg) { |
c66ac9db NB |
3776 | /* |
3777 | * Set the hardcoded Additional Length | |
3778 | */ | |
3779 | buf[4] = ((add_len >> 24) & 0xff); | |
3780 | buf[5] = ((add_len >> 16) & 0xff); | |
3781 | buf[6] = ((add_len >> 8) & 0xff); | |
3782 | buf[7] = (add_len & 0xff); | |
3783 | ||
05d1c7c0 AG |
3784 | if (cmd->data_length < 22) |
3785 | goto err; | |
3786 | ||
c66ac9db NB |
3787 | /* |
3788 | * Set the Reservation key. | |
3789 | * | |
3790 | * From spc4r17, section 5.7.10: | |
3791 | * A persistent reservation holder has its reservation key | |
3792 | * returned in the parameter data from a PERSISTENT | |
3793 | * RESERVE IN command with READ RESERVATION service action as | |
3794 | * follows: | |
3795 | * a) For a persistent reservation of the type Write Exclusive | |
3796 | * - All Registrants or Exclusive Access  All Regitrants, | |
3797 | * the reservation key shall be set to zero; or | |
3798 | * b) For all other persistent reservation types, the | |
3799 | * reservation key shall be set to the registered | |
3800 | * reservation key for the I_T nexus that holds the | |
3801 | * persistent reservation. | |
3802 | */ | |
3803 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3804 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3805 | pr_res_key = 0; | |
3806 | else | |
3807 | pr_res_key = pr_reg->pr_res_key; | |
3808 | ||
3809 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
3810 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
3811 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
3812 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
3813 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
3814 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
3815 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
3816 | buf[15] = (pr_res_key & 0xff); | |
3817 | /* | |
3818 | * Set the SCOPE and TYPE | |
3819 | */ | |
3820 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3821 | (pr_reg->pr_res_type & 0x0f); | |
3822 | } | |
05d1c7c0 AG |
3823 | |
3824 | err: | |
0fd97ccf | 3825 | spin_unlock(&dev->dev_reservation_lock); |
4949314c | 3826 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3827 | |
3828 | return 0; | |
3829 | } | |
3830 | ||
3831 | /* | |
3832 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3833 | * | |
3834 | * See spc4r17 section 6.13.4 Table 165 | |
3835 | */ | |
de103c93 CH |
3836 | static sense_reason_t |
3837 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
c66ac9db | 3838 | { |
5951146d | 3839 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 3840 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3841 | unsigned char *buf; |
c66ac9db NB |
3842 | u16 add_len = 8; /* Hardcoded to 8. */ |
3843 | ||
3844 | if (cmd->data_length < 6) { | |
6708bb27 | 3845 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 3846 | " %u too small\n", cmd->data_length); |
de103c93 | 3847 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3848 | } |
3849 | ||
4949314c | 3850 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3851 | if (!buf) |
3852 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3853 | |
c435285d | 3854 | buf[0] = ((add_len >> 8) & 0xff); |
c66ac9db NB |
3855 | buf[1] = (add_len & 0xff); |
3856 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
3857 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3858 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3859 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3860 | /* | |
3861 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3862 | * set the TMV: Task Mask Valid bit. | |
3863 | */ | |
3864 | buf[3] |= 0x80; | |
3865 | /* | |
3866 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3867 | */ | |
3868 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3869 | /* | |
3870 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3871 | */ | |
3872 | if (pr_tmpl->pr_aptpl_active) | |
3873 | buf[3] |= 0x01; | |
3874 | /* | |
3875 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3876 | */ | |
3877 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3878 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
3879 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
3880 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
3881 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
3882 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3883 | ||
4949314c | 3884 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3885 | |
c66ac9db NB |
3886 | return 0; |
3887 | } | |
3888 | ||
3889 | /* | |
3890 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
3891 | * | |
3892 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
3893 | */ | |
de103c93 CH |
3894 | static sense_reason_t |
3895 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
c66ac9db | 3896 | { |
0fd97ccf | 3897 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3898 | struct se_node_acl *se_nacl; |
c66ac9db NB |
3899 | struct se_portal_group *se_tpg; |
3900 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 3901 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3902 | unsigned char *buf; |
2650d71e | 3903 | u32 add_desc_len = 0, add_len = 0; |
c66ac9db | 3904 | u32 off = 8; /* off into first Full Status descriptor */ |
d16ca7c5 | 3905 | int format_code = 0, pr_res_type = 0, pr_res_scope = 0; |
2650d71e | 3906 | int exp_desc_len, desc_len; |
d16ca7c5 | 3907 | bool all_reg = false; |
c66ac9db NB |
3908 | |
3909 | if (cmd->data_length < 8) { | |
6708bb27 | 3910 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 3911 | " too small\n", cmd->data_length); |
de103c93 | 3912 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3913 | } |
3914 | ||
4949314c | 3915 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3916 | if (!buf) |
3917 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3918 | |
0fd97ccf CH |
3919 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3920 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3921 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3922 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3923 | |
d16ca7c5 NB |
3924 | spin_lock(&dev->dev_reservation_lock); |
3925 | if (dev->dev_pr_res_holder) { | |
3926 | struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; | |
3927 | ||
3928 | if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
3929 | pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { | |
3930 | all_reg = true; | |
3931 | pr_res_type = pr_holder->pr_res_type; | |
3932 | pr_res_scope = pr_holder->pr_res_scope; | |
3933 | } | |
3934 | } | |
3935 | spin_unlock(&dev->dev_reservation_lock); | |
3936 | ||
c66ac9db NB |
3937 | spin_lock(&pr_tmpl->registration_lock); |
3938 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3939 | &pr_tmpl->registration_list, pr_reg_list) { | |
3940 | ||
3941 | se_nacl = pr_reg->pr_reg_nacl; | |
3942 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
3943 | add_desc_len = 0; | |
3944 | ||
33940d09 | 3945 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3946 | spin_unlock(&pr_tmpl->registration_lock); |
3947 | /* | |
3948 | * Determine expected length of $FABRIC_MOD specific | |
3949 | * TransportID full status descriptor.. | |
3950 | */ | |
2650d71e CH |
3951 | exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, |
3952 | &format_code); | |
3953 | if (exp_desc_len < 0 || | |
3954 | exp_desc_len + add_len > cmd->data_length) { | |
6708bb27 | 3955 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
3956 | " out of buffer: %d\n", cmd->data_length); |
3957 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 3958 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3959 | break; |
3960 | } | |
3961 | /* | |
3962 | * Set RESERVATION KEY | |
3963 | */ | |
3964 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3965 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3966 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3967 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3968 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3969 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3970 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3971 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3972 | off += 4; /* Skip Over Reserved area */ | |
3973 | ||
3974 | /* | |
3975 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
3976 | */ | |
3977 | if (pr_reg->pr_reg_all_tg_pt) | |
3978 | buf[off] = 0x02; | |
3979 | /* | |
3980 | * The struct se_lun pointer will be present for the | |
3981 | * reservation holder for PR_HOLDER bit. | |
3982 | * | |
3983 | * Also, if this registration is the reservation | |
d16ca7c5 NB |
3984 | * holder or there is an All Registrants reservation |
3985 | * active, fill in SCOPE and TYPE in the next byte. | |
c66ac9db NB |
3986 | */ |
3987 | if (pr_reg->pr_res_holder) { | |
3988 | buf[off++] |= 0x01; | |
3989 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
3990 | (pr_reg->pr_res_type & 0x0f); | |
d16ca7c5 NB |
3991 | } else if (all_reg) { |
3992 | buf[off++] |= 0x01; | |
3993 | buf[off++] = (pr_res_scope & 0xf0) | | |
3994 | (pr_res_type & 0x0f); | |
3995 | } else { | |
c66ac9db | 3996 | off += 2; |
d16ca7c5 | 3997 | } |
c66ac9db NB |
3998 | |
3999 | off += 4; /* Skip over reserved area */ | |
4000 | /* | |
4001 | * From spc4r17 6.3.15: | |
4002 | * | |
4003 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4004 | * IDENTIFIER field contains the relative port identifier (see | |
4005 | * 3.1.120) of the target port that is part of the I_T nexus | |
4006 | * described by this full status descriptor. If the ALL_TG_PT | |
4007 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4008 | * IDENTIFIER field are not defined by this standard. | |
4009 | */ | |
6708bb27 | 4010 | if (!pr_reg->pr_reg_all_tg_pt) { |
79dc9c9e | 4011 | u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; |
c66ac9db | 4012 | |
79dc9c9e NB |
4013 | buf[off++] = ((sep_rtpi >> 8) & 0xff); |
4014 | buf[off++] = (sep_rtpi & 0xff); | |
c66ac9db | 4015 | } else |
35d1efe8 | 4016 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
c66ac9db | 4017 | |
2650d71e CH |
4018 | buf[off+4] = se_tpg->proto_id; |
4019 | ||
c66ac9db | 4020 | /* |
2650d71e | 4021 | * Now, have the $FABRIC_MOD fill in the transport ID. |
c66ac9db | 4022 | */ |
2650d71e CH |
4023 | desc_len = target_get_pr_transport_id(se_nacl, pr_reg, |
4024 | &format_code, &buf[off+4]); | |
c66ac9db NB |
4025 | |
4026 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 4027 | atomic_dec_mb(&pr_reg->pr_res_holders); |
2650d71e CH |
4028 | |
4029 | if (desc_len < 0) | |
4030 | break; | |
c66ac9db NB |
4031 | /* |
4032 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4033 | */ | |
4034 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4035 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4036 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4037 | buf[off++] = (desc_len & 0xff); | |
4038 | /* | |
4039 | * Size of full desctipor header minus TransportID | |
4040 | * containing $FABRIC_MOD specific) initiator device/port | |
4041 | * WWN information. | |
4042 | * | |
4043 | * See spc4r17 Section 6.13.5 Table 169 | |
4044 | */ | |
4045 | add_desc_len = (24 + desc_len); | |
4046 | ||
4047 | off += desc_len; | |
4048 | add_len += add_desc_len; | |
4049 | } | |
4050 | spin_unlock(&pr_tmpl->registration_lock); | |
4051 | /* | |
4052 | * Set ADDITIONAL_LENGTH | |
4053 | */ | |
4054 | buf[4] = ((add_len >> 24) & 0xff); | |
4055 | buf[5] = ((add_len >> 16) & 0xff); | |
4056 | buf[6] = ((add_len >> 8) & 0xff); | |
4057 | buf[7] = (add_len & 0xff); | |
4058 | ||
4949314c | 4059 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4060 | |
c66ac9db NB |
4061 | return 0; |
4062 | } | |
4063 | ||
de103c93 CH |
4064 | sense_reason_t |
4065 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) | |
c66ac9db | 4066 | { |
de103c93 | 4067 | sense_reason_t ret; |
e76a35d6 | 4068 | |
c66ac9db NB |
4069 | /* |
4070 | * Following spc2r20 5.5.1 Reservations overview: | |
4071 | * | |
4072 | * If a logical unit has been reserved by any RESERVE command and is | |
4073 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4074 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4075 | * initiator or service action and shall terminate with a RESERVATION | |
4076 | * CONFLICT status. | |
4077 | */ | |
0fd97ccf | 4078 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
6708bb27 | 4079 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4080 | " SPC-2 reservation is held, returning" |
4081 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 4082 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
4083 | } |
4084 | ||
617c0e06 CH |
4085 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4086 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4087 | ret = core_scsi3_pri_read_keys(cmd); |
4088 | break; | |
617c0e06 | 4089 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4090 | ret = core_scsi3_pri_read_reservation(cmd); |
4091 | break; | |
617c0e06 | 4092 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4093 | ret = core_scsi3_pri_report_capabilities(cmd); |
4094 | break; | |
617c0e06 | 4095 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4096 | ret = core_scsi3_pri_read_full_status(cmd); |
4097 | break; | |
617c0e06 CH |
4098 | default: |
4099 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4100 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
de103c93 | 4101 | return TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
4102 | } |
4103 | ||
6bb35e00 CH |
4104 | if (!ret) |
4105 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4106 | return ret; |
c66ac9db NB |
4107 | } |
4108 | ||
de103c93 CH |
4109 | sense_reason_t |
4110 | target_check_reservation(struct se_cmd *cmd) | |
c66ac9db | 4111 | { |
d977f437 | 4112 | struct se_device *dev = cmd->se_dev; |
de103c93 | 4113 | sense_reason_t ret; |
c66ac9db | 4114 | |
d977f437 CH |
4115 | if (!cmd->se_sess) |
4116 | return 0; | |
4117 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
4118 | return 0; | |
a3541703 | 4119 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
d977f437 | 4120 | return 0; |
c66ac9db | 4121 | |
d977f437 CH |
4122 | spin_lock(&dev->dev_reservation_lock); |
4123 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) | |
4124 | ret = target_scsi2_reservation_check(cmd); | |
4125 | else | |
4126 | ret = target_scsi3_pr_reservation_check(cmd); | |
4127 | spin_unlock(&dev->dev_reservation_lock); | |
0fd97ccf | 4128 | |
d977f437 | 4129 | return ret; |
c66ac9db | 4130 | } |