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> | |
5538d294 | 30 | #include <linux/vmalloc.h> |
0e9b10a9 | 31 | #include <linux/file.h> |
ba929992 | 32 | #include <scsi/scsi_proto.h> |
c66ac9db NB |
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; | |
50 | struct se_dev_entry *dest_se_deve; | |
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; |
f2d30680 HR |
232 | pr_debug("SCSI-2 Released reservation for %s LUN: %llu ->" |
233 | " MAPPED LUN: %llu for %s\n", | |
234 | tpg->se_tpg_tfo->get_fabric_name(), | |
29a05dee | 235 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 236 | sess->se_node_acl->initiatorname); |
c66ac9db | 237 | |
d29a5b6a CH |
238 | out_unlock: |
239 | spin_unlock(&dev->dev_reservation_lock); | |
240 | out: | |
de103c93 CH |
241 | target_complete_cmd(cmd, GOOD); |
242 | return 0; | |
c66ac9db NB |
243 | } |
244 | ||
de103c93 CH |
245 | sense_reason_t |
246 | target_scsi2_reservation_reserve(struct se_cmd *cmd) | |
c66ac9db NB |
247 | { |
248 | struct se_device *dev = cmd->se_dev; | |
249 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 250 | struct se_portal_group *tpg; |
de103c93 CH |
251 | sense_reason_t ret = 0; |
252 | int rc; | |
c66ac9db | 253 | |
a1d8b49a AG |
254 | if ((cmd->t_task_cdb[1] & 0x01) && |
255 | (cmd->t_task_cdb[1] & 0x02)) { | |
6708bb27 | 256 | pr_err("LongIO and Obselete Bits set, returning" |
c66ac9db | 257 | " ILLEGAL_REQUEST\n"); |
de103c93 | 258 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
c66ac9db NB |
259 | } |
260 | /* | |
261 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
262 | * ops | |
263 | */ | |
609234e3 | 264 | if (!sess || !sess->se_tpg) |
d29a5b6a | 265 | goto out; |
087a03b3 NB |
266 | rc = target_check_scsi2_reservation_conflict(cmd); |
267 | if (rc == 1) | |
d29a5b6a | 268 | goto out; |
c66ac9db | 269 | |
de103c93 CH |
270 | if (rc < 0) |
271 | return TCM_RESERVATION_CONFLICT; | |
272 | ||
609234e3 | 273 | tpg = sess->se_tpg; |
c66ac9db NB |
274 | spin_lock(&dev->dev_reservation_lock); |
275 | if (dev->dev_reserved_node_acl && | |
276 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { | |
6708bb27 | 277 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
e3d6f909 | 278 | tpg->se_tpg_tfo->get_fabric_name()); |
f2d30680 | 279 | pr_err("Original reserver LUN: %llu %s\n", |
e3d6f909 | 280 | cmd->se_lun->unpacked_lun, |
c66ac9db | 281 | dev->dev_reserved_node_acl->initiatorname); |
f2d30680 | 282 | pr_err("Current attempt - LUN: %llu -> MAPPED LUN: %llu" |
e3d6f909 | 283 | " from %s \n", cmd->se_lun->unpacked_lun, |
29a05dee | 284 | cmd->orig_fe_lun, |
c66ac9db | 285 | sess->se_node_acl->initiatorname); |
de103c93 | 286 | ret = TCM_RESERVATION_CONFLICT; |
d29a5b6a | 287 | goto out_unlock; |
c66ac9db NB |
288 | } |
289 | ||
290 | dev->dev_reserved_node_acl = sess->se_node_acl; | |
0fd97ccf | 291 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; |
c66ac9db NB |
292 | if (sess->sess_bin_isid != 0) { |
293 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
0fd97ccf | 294 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 295 | } |
f2d30680 | 296 | pr_debug("SCSI-2 Reserved %s LUN: %llu -> MAPPED LUN: %llu" |
e3d6f909 | 297 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
29a05dee | 298 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 299 | sess->se_node_acl->initiatorname); |
c66ac9db | 300 | |
d29a5b6a CH |
301 | out_unlock: |
302 | spin_unlock(&dev->dev_reservation_lock); | |
303 | out: | |
6bb35e00 CH |
304 | if (!ret) |
305 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 306 | return ret; |
c66ac9db NB |
307 | } |
308 | ||
c66ac9db NB |
309 | |
310 | /* | |
311 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
312 | * | |
313 | * This function is called by those initiator ports who are *NOT* | |
314 | * the active PR reservation holder when a reservation is present. | |
315 | */ | |
9fcb57f3 CH |
316 | static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, |
317 | bool isid_mismatch) | |
c66ac9db | 318 | { |
d977f437 | 319 | unsigned char *cdb = cmd->t_task_cdb; |
e3d6f909 | 320 | struct se_session *se_sess = cmd->se_sess; |
29a05dee | 321 | struct se_node_acl *nacl = se_sess->se_node_acl; |
9fcb57f3 | 322 | int other_cdb = 0; |
c66ac9db NB |
323 | int registered_nexus = 0, ret = 1; /* Conflict by default */ |
324 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
325 | int we = 0; /* Write Exclusive */ | |
326 | int legacy = 0; /* Act like a legacy device and return | |
327 | * RESERVATION CONFLICT on some CDBs */ | |
c66ac9db | 328 | |
9fcb57f3 CH |
329 | if (isid_mismatch) { |
330 | registered_nexus = 0; | |
331 | } else { | |
332 | struct se_dev_entry *se_deve; | |
333 | ||
334 | rcu_read_lock(); | |
335 | se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); | |
336 | if (se_deve) | |
337 | registered_nexus = test_bit(DEF_PR_REG_ACTIVE, | |
338 | &se_deve->deve_flags); | |
339 | rcu_read_unlock(); | |
340 | } | |
c66ac9db NB |
341 | |
342 | switch (pr_reg_type) { | |
343 | case PR_TYPE_WRITE_EXCLUSIVE: | |
344 | we = 1; | |
345 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
346 | /* | |
347 | * Some commands are only allowed for the persistent reservation | |
348 | * holder. | |
349 | */ | |
c66ac9db NB |
350 | break; |
351 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
352 | we = 1; | |
353 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
354 | /* | |
355 | * Some commands are only allowed for registered I_T Nexuses. | |
356 | */ | |
357 | reg_only = 1; | |
c66ac9db NB |
358 | break; |
359 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
360 | we = 1; | |
361 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
362 | /* | |
363 | * Each registered I_T Nexus is a reservation holder. | |
364 | */ | |
365 | all_reg = 1; | |
c66ac9db NB |
366 | break; |
367 | default: | |
e3d6f909 | 368 | return -EINVAL; |
c66ac9db NB |
369 | } |
370 | /* | |
371 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
372 | */ | |
373 | switch (cdb[0]) { | |
374 | case SECURITY_PROTOCOL_IN: | |
375 | if (registered_nexus) | |
376 | return 0; | |
377 | ret = (we) ? 0 : 1; | |
378 | break; | |
379 | case MODE_SENSE: | |
380 | case MODE_SENSE_10: | |
381 | case READ_ATTRIBUTE: | |
382 | case READ_BUFFER: | |
383 | case RECEIVE_DIAGNOSTIC: | |
384 | if (legacy) { | |
385 | ret = 1; | |
386 | break; | |
387 | } | |
388 | if (registered_nexus) { | |
389 | ret = 0; | |
390 | break; | |
391 | } | |
392 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
393 | break; | |
394 | case PERSISTENT_RESERVE_OUT: | |
395 | /* | |
396 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
397 | * are allowed in the presence of various reservations. | |
398 | * See spc4r17, table 46 | |
399 | */ | |
400 | switch (cdb[1] & 0x1f) { | |
401 | case PRO_CLEAR: | |
402 | case PRO_PREEMPT: | |
403 | case PRO_PREEMPT_AND_ABORT: | |
404 | ret = (registered_nexus) ? 0 : 1; | |
405 | break; | |
406 | case PRO_REGISTER: | |
407 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
408 | ret = 0; | |
409 | break; | |
410 | case PRO_REGISTER_AND_MOVE: | |
411 | case PRO_RESERVE: | |
412 | ret = 1; | |
413 | break; | |
414 | case PRO_RELEASE: | |
415 | ret = (registered_nexus) ? 0 : 1; | |
416 | break; | |
417 | default: | |
6708bb27 | 418 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 419 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 420 | return -EINVAL; |
c66ac9db NB |
421 | } |
422 | break; | |
423 | case RELEASE: | |
424 | case RELEASE_10: | |
eacac00c | 425 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
426 | ret = 0; |
427 | break; | |
428 | case RESERVE: | |
429 | case RESERVE_10: | |
eacac00c | 430 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
431 | ret = 0; |
432 | break; | |
433 | case TEST_UNIT_READY: | |
434 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
435 | break; | |
436 | case MAINTENANCE_IN: | |
437 | switch (cdb[1] & 0x1f) { | |
438 | case MI_MANAGEMENT_PROTOCOL_IN: | |
439 | if (registered_nexus) { | |
440 | ret = 0; | |
441 | break; | |
442 | } | |
443 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
444 | break; | |
445 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
446 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
447 | if (legacy) { | |
448 | ret = 1; | |
449 | break; | |
450 | } | |
451 | if (registered_nexus) { | |
452 | ret = 0; | |
453 | break; | |
454 | } | |
455 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
456 | break; | |
457 | case MI_REPORT_ALIASES: | |
458 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
459 | case MI_REPORT_PRIORITY: | |
460 | case MI_REPORT_TARGET_PGS: | |
461 | case MI_REPORT_TIMESTAMP: | |
462 | ret = 0; /* Allowed */ | |
463 | break; | |
464 | default: | |
6708bb27 | 465 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 466 | (cdb[1] & 0x1f)); |
e3d6f909 | 467 | return -EINVAL; |
c66ac9db NB |
468 | } |
469 | break; | |
470 | case ACCESS_CONTROL_IN: | |
471 | case ACCESS_CONTROL_OUT: | |
472 | case INQUIRY: | |
473 | case LOG_SENSE: | |
85686f69 | 474 | case SERVICE_ACTION_IN_12: |
c66ac9db NB |
475 | case REPORT_LUNS: |
476 | case REQUEST_SENSE: | |
6816966a | 477 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
478 | ret = 0; /*/ Allowed CDBs */ |
479 | break; | |
480 | default: | |
481 | other_cdb = 1; | |
482 | break; | |
483 | } | |
484 | /* | |
25985edc | 485 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
486 | * statement. |
487 | */ | |
6708bb27 | 488 | if (!ret && !other_cdb) { |
125d0119 | 489 | pr_debug("Allowing explicit CDB: 0x%02x for %s" |
c66ac9db NB |
490 | " reservation holder\n", cdb[0], |
491 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 492 | |
c66ac9db NB |
493 | return ret; |
494 | } | |
495 | /* | |
496 | * Check if write exclusive initiator ports *NOT* holding the | |
497 | * WRITE_EXCLUSIVE_* reservation. | |
498 | */ | |
ee1b1b9c | 499 | if (we && !registered_nexus) { |
c66ac9db NB |
500 | if (cmd->data_direction == DMA_TO_DEVICE) { |
501 | /* | |
502 | * Conflict for write exclusive | |
503 | */ | |
6708bb27 | 504 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
505 | " %s CDB: 0x%02x to %s reservation\n", |
506 | transport_dump_cmd_direction(cmd), | |
507 | se_sess->se_node_acl->initiatorname, cdb[0], | |
508 | core_scsi3_pr_dump_type(pr_reg_type)); | |
509 | return 1; | |
510 | } else { | |
511 | /* | |
512 | * Allow non WRITE CDBs for all Write Exclusive | |
513 | * PR TYPEs to pass for registered and | |
514 | * non-registered_nexuxes NOT holding the reservation. | |
515 | * | |
516 | * We only make noise for the unregisterd nexuses, | |
517 | * as we expect registered non-reservation holding | |
518 | * nexuses to issue CDBs. | |
519 | */ | |
8b1e1244 | 520 | |
6708bb27 | 521 | if (!registered_nexus) { |
125d0119 | 522 | pr_debug("Allowing implicit CDB: 0x%02x" |
c66ac9db NB |
523 | " for %s reservation on unregistered" |
524 | " nexus\n", cdb[0], | |
525 | core_scsi3_pr_dump_type(pr_reg_type)); | |
526 | } | |
8b1e1244 | 527 | |
c66ac9db NB |
528 | return 0; |
529 | } | |
530 | } else if ((reg_only) || (all_reg)) { | |
531 | if (registered_nexus) { | |
532 | /* | |
533 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
534 | * allow commands from registered nexuses. | |
535 | */ | |
8b1e1244 | 536 | |
125d0119 | 537 | pr_debug("Allowing implicit CDB: 0x%02x for %s" |
c66ac9db NB |
538 | " reservation\n", cdb[0], |
539 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 540 | |
c66ac9db NB |
541 | return 0; |
542 | } | |
1ecc7586 LD |
543 | } else if (we && registered_nexus) { |
544 | /* | |
545 | * Reads are allowed for Write Exclusive locks | |
546 | * from all registrants. | |
547 | */ | |
548 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
549 | pr_debug("Allowing READ CDB: 0x%02x for %s" | |
550 | " reservation\n", cdb[0], | |
551 | core_scsi3_pr_dump_type(pr_reg_type)); | |
552 | ||
553 | return 0; | |
554 | } | |
c66ac9db | 555 | } |
6708bb27 | 556 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
557 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
558 | (registered_nexus) ? "" : "un", | |
559 | se_sess->se_node_acl->initiatorname, cdb[0], | |
560 | core_scsi3_pr_dump_type(pr_reg_type)); | |
561 | ||
562 | return 1; /* Conflict by default */ | |
563 | } | |
564 | ||
de103c93 CH |
565 | static sense_reason_t |
566 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) | |
d977f437 CH |
567 | { |
568 | struct se_device *dev = cmd->se_dev; | |
569 | struct se_session *sess = cmd->se_sess; | |
570 | u32 pr_reg_type; | |
9fcb57f3 | 571 | bool isid_mismatch = false; |
d977f437 CH |
572 | |
573 | if (!dev->dev_pr_res_holder) | |
574 | return 0; | |
575 | ||
576 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
577 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
578 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) | |
579 | goto check_nonholder; | |
580 | ||
581 | if (dev->dev_pr_res_holder->isid_present_at_reg) { | |
582 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != | |
583 | sess->sess_bin_isid) { | |
9fcb57f3 | 584 | isid_mismatch = true; |
d977f437 CH |
585 | goto check_nonholder; |
586 | } | |
587 | } | |
588 | ||
589 | return 0; | |
590 | ||
591 | check_nonholder: | |
9fcb57f3 | 592 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) |
de103c93 | 593 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
594 | return 0; |
595 | } | |
596 | ||
c66ac9db NB |
597 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
598 | { | |
c66ac9db | 599 | u32 prg; |
0fd97ccf | 600 | |
c66ac9db NB |
601 | /* |
602 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
603 | * counter mainted by the device server. | |
604 | * | |
605 | * Note that this is done regardless of Active Persist across | |
606 | * Target PowerLoss (APTPL) | |
607 | * | |
608 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
609 | */ | |
610 | spin_lock(&dev->dev_reservation_lock); | |
0fd97ccf | 611 | prg = dev->t10_pr.pr_generation++; |
c66ac9db NB |
612 | spin_unlock(&dev->dev_reservation_lock); |
613 | ||
614 | return prg; | |
615 | } | |
616 | ||
c66ac9db NB |
617 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
618 | struct se_device *dev, | |
619 | struct se_node_acl *nacl, | |
79dc9c9e | 620 | struct se_lun *lun, |
3ccd6e83 | 621 | struct se_dev_entry *dest_deve, |
f2d30680 | 622 | u64 mapped_lun, |
c66ac9db NB |
623 | unsigned char *isid, |
624 | u64 sa_res_key, | |
625 | int all_tg_pt, | |
626 | int aptpl) | |
627 | { | |
c66ac9db NB |
628 | struct t10_pr_registration *pr_reg; |
629 | ||
630 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
631 | if (!pr_reg) { |
632 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
633 | return NULL; |
634 | } | |
635 | ||
c66ac9db NB |
636 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); |
637 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
638 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
639 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
640 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
641 | atomic_set(&pr_reg->pr_res_holders, 0); | |
642 | pr_reg->pr_reg_nacl = nacl; | |
3ccd6e83 NB |
643 | /* |
644 | * For destination registrations for ALL_TG_PT=1 and SPEC_I_PT=1, | |
645 | * the se_dev_entry->pr_ref will have been already obtained by | |
646 | * core_get_se_deve_from_rtpi() or __core_scsi3_alloc_registration(). | |
647 | * | |
648 | * Otherwise, locate se_dev_entry now and obtain a reference until | |
649 | * registration completes in __core_scsi3_add_registration(). | |
650 | */ | |
651 | if (dest_deve) { | |
652 | pr_reg->pr_reg_deve = dest_deve; | |
653 | } else { | |
654 | rcu_read_lock(); | |
655 | pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); | |
656 | if (!pr_reg->pr_reg_deve) { | |
657 | rcu_read_unlock(); | |
658 | pr_err("Unable to locate PR deve %s mapped_lun: %llu\n", | |
659 | nacl->initiatorname, mapped_lun); | |
660 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
661 | return NULL; | |
662 | } | |
663 | kref_get(&pr_reg->pr_reg_deve->pr_kref); | |
664 | rcu_read_unlock(); | |
665 | } | |
79dc9c9e NB |
666 | pr_reg->pr_res_mapped_lun = mapped_lun; |
667 | pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; | |
adf653f9 | 668 | pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; |
c66ac9db NB |
669 | pr_reg->pr_res_key = sa_res_key; |
670 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
671 | pr_reg->pr_reg_aptpl = aptpl; | |
c66ac9db NB |
672 | /* |
673 | * If an ISID value for this SCSI Initiator Port exists, | |
674 | * save it to the registration now. | |
675 | */ | |
676 | if (isid != NULL) { | |
677 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
678 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
679 | pr_reg->isid_present_at_reg = 1; | |
680 | } | |
681 | ||
682 | return pr_reg; | |
683 | } | |
684 | ||
685 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
686 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
687 | ||
688 | /* | |
689 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
690 | * modes. | |
691 | */ | |
692 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
693 | struct se_device *dev, | |
694 | struct se_node_acl *nacl, | |
79dc9c9e | 695 | struct se_lun *lun, |
c66ac9db | 696 | struct se_dev_entry *deve, |
f2d30680 | 697 | u64 mapped_lun, |
c66ac9db NB |
698 | unsigned char *isid, |
699 | u64 sa_res_key, | |
700 | int all_tg_pt, | |
701 | int aptpl) | |
702 | { | |
703 | struct se_dev_entry *deve_tmp; | |
704 | struct se_node_acl *nacl_tmp; | |
79dc9c9e | 705 | struct se_lun_acl *lacl_tmp; |
adf653f9 | 706 | struct se_lun *lun_tmp, *next, *dest_lun; |
9ac8928e | 707 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db NB |
708 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; |
709 | int ret; | |
710 | /* | |
711 | * Create a registration for the I_T Nexus upon which the | |
712 | * PROUT REGISTER was received. | |
713 | */ | |
79dc9c9e NB |
714 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
715 | isid, sa_res_key, all_tg_pt, | |
716 | aptpl); | |
6708bb27 | 717 | if (!pr_reg) |
c66ac9db NB |
718 | return NULL; |
719 | /* | |
720 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
721 | */ | |
6708bb27 | 722 | if (!all_tg_pt) |
c66ac9db NB |
723 | return pr_reg; |
724 | /* | |
725 | * Create list of matching SCSI Initiator Port registrations | |
726 | * for ALL_TG_PT=1 | |
727 | */ | |
728 | spin_lock(&dev->se_port_lock); | |
adf653f9 | 729 | list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) { |
9e37d042 NB |
730 | if (!percpu_ref_tryget_live(&lun_tmp->lun_ref)) |
731 | continue; | |
c66ac9db NB |
732 | spin_unlock(&dev->se_port_lock); |
733 | ||
1adff1b3 | 734 | spin_lock(&lun_tmp->lun_deve_lock); |
adf653f9 | 735 | list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) { |
c66ac9db NB |
736 | /* |
737 | * This pointer will be NULL for demo mode MappedLUNs | |
125d0119 | 738 | * that have not been make explicit via a ConfigFS |
c66ac9db NB |
739 | * MappedLUN group for the SCSI Initiator Node ACL. |
740 | */ | |
6708bb27 | 741 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
742 | continue; |
743 | ||
79dc9c9e | 744 | lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, |
adf653f9 | 745 | lockdep_is_held(&lun_tmp->lun_deve_lock)); |
79dc9c9e | 746 | nacl_tmp = lacl_tmp->se_lun_nacl; |
c66ac9db NB |
747 | /* |
748 | * Skip the matching struct se_node_acl that is allocated | |
749 | * above.. | |
750 | */ | |
751 | if (nacl == nacl_tmp) | |
752 | continue; | |
753 | /* | |
754 | * Only perform PR registrations for target ports on | |
755 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
756 | * arrived. | |
757 | */ | |
758 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
759 | continue; | |
760 | /* | |
761 | * Look for a matching Initiator Node ACL in ASCII format | |
762 | */ | |
763 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
764 | continue; | |
765 | ||
29a05dee | 766 | kref_get(&deve_tmp->pr_kref); |
1adff1b3 | 767 | spin_unlock(&lun_tmp->lun_deve_lock); |
c66ac9db NB |
768 | /* |
769 | * Grab a configfs group dependency that is released | |
770 | * for the exception path at label out: below, or upon | |
771 | * completion of adding ALL_TG_PT=1 registrations in | |
772 | * __core_scsi3_add_registration() | |
773 | */ | |
774 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
775 | if (ret < 0) { | |
6708bb27 | 776 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db | 777 | "_item() failed\n"); |
9e37d042 | 778 | percpu_ref_put(&lun_tmp->lun_ref); |
29a05dee | 779 | kref_put(&deve_tmp->pr_kref, target_pr_kref_release); |
c66ac9db NB |
780 | goto out; |
781 | } | |
782 | /* | |
783 | * Located a matching SCSI Initiator Port on a different | |
784 | * port, allocate the pr_reg_atp and attach it to the | |
785 | * pr_reg->pr_reg_atp_list that will be processed once | |
786 | * the original *pr_reg is processed in | |
787 | * __core_scsi3_add_registration() | |
788 | */ | |
adf653f9 | 789 | dest_lun = rcu_dereference_check(deve_tmp->se_lun, |
79dc9c9e NB |
790 | atomic_read(&deve_tmp->pr_kref.refcount) != 0); |
791 | ||
c66ac9db | 792 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, |
adf653f9 | 793 | nacl_tmp, dest_lun, deve_tmp, |
79dc9c9e | 794 | deve_tmp->mapped_lun, NULL, |
c66ac9db | 795 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 796 | if (!pr_reg_atp) { |
9e37d042 | 797 | percpu_ref_put(&lun_tmp->lun_ref); |
c66ac9db NB |
798 | core_scsi3_lunacl_undepend_item(deve_tmp); |
799 | goto out; | |
800 | } | |
801 | ||
802 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
803 | &pr_reg->pr_reg_atp_list); | |
1adff1b3 | 804 | spin_lock(&lun_tmp->lun_deve_lock); |
c66ac9db | 805 | } |
1adff1b3 | 806 | spin_unlock(&lun_tmp->lun_deve_lock); |
c66ac9db NB |
807 | |
808 | spin_lock(&dev->se_port_lock); | |
9e37d042 | 809 | percpu_ref_put(&lun_tmp->lun_ref); |
c66ac9db NB |
810 | } |
811 | spin_unlock(&dev->se_port_lock); | |
812 | ||
813 | return pr_reg; | |
814 | out: | |
815 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
816 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
817 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
818 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
819 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
820 | } | |
821 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
822 | return NULL; | |
823 | } | |
824 | ||
825 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 826 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
827 | u64 sa_res_key, |
828 | unsigned char *i_port, | |
829 | unsigned char *isid, | |
f2d30680 | 830 | u64 mapped_lun, |
c66ac9db NB |
831 | unsigned char *t_port, |
832 | u16 tpgt, | |
f2d30680 | 833 | u64 target_lun, |
c66ac9db NB |
834 | int res_holder, |
835 | int all_tg_pt, | |
836 | u8 type) | |
837 | { | |
838 | struct t10_pr_registration *pr_reg; | |
839 | ||
6708bb27 AG |
840 | if (!i_port || !t_port || !sa_res_key) { |
841 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 842 | return -EINVAL; |
c66ac9db NB |
843 | } |
844 | ||
845 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
846 | if (!pr_reg) { |
847 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 848 | return -ENOMEM; |
c66ac9db | 849 | } |
c66ac9db NB |
850 | |
851 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
852 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
853 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
854 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
855 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
856 | atomic_set(&pr_reg->pr_res_holders, 0); | |
857 | pr_reg->pr_reg_nacl = NULL; | |
858 | pr_reg->pr_reg_deve = NULL; | |
859 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
860 | pr_reg->pr_aptpl_target_lun = target_lun; | |
861 | pr_reg->pr_res_key = sa_res_key; | |
862 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
863 | pr_reg->pr_reg_aptpl = 1; | |
c66ac9db NB |
864 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ |
865 | pr_reg->pr_res_type = type; | |
866 | /* | |
867 | * If an ISID value had been saved in APTPL metadata for this | |
868 | * SCSI Initiator Port, restore it now. | |
869 | */ | |
870 | if (isid != NULL) { | |
871 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
872 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
873 | pr_reg->isid_present_at_reg = 1; | |
874 | } | |
875 | /* | |
876 | * Copy the i_port and t_port information from caller. | |
877 | */ | |
878 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
879 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
880 | pr_reg->pr_reg_tpgt = tpgt; | |
881 | /* | |
882 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
883 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
884 | * the Initiator Node LUN ACL from the fabric module is created for | |
885 | * this registration. | |
886 | */ | |
887 | pr_reg->pr_res_holder = res_holder; | |
888 | ||
889 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 890 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
891 | " metadata\n", (res_holder) ? "+reservation" : ""); |
892 | return 0; | |
893 | } | |
894 | ||
895 | static void core_scsi3_aptpl_reserve( | |
896 | struct se_device *dev, | |
897 | struct se_portal_group *tpg, | |
898 | struct se_node_acl *node_acl, | |
899 | struct t10_pr_registration *pr_reg) | |
900 | { | |
901 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
902 | |
903 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 904 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
905 | |
906 | spin_lock(&dev->dev_reservation_lock); | |
907 | dev->dev_pr_res_holder = pr_reg; | |
908 | spin_unlock(&dev->dev_reservation_lock); | |
909 | ||
6708bb27 | 910 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 911 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 912 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
913 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
914 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 915 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 916 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
d2843c17 | 917 | i_buf); |
c66ac9db NB |
918 | } |
919 | ||
920 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
33ce6a87 | 921 | struct t10_pr_registration *, enum register_type, int); |
c66ac9db NB |
922 | |
923 | static int __core_scsi3_check_aptpl_registration( | |
924 | struct se_device *dev, | |
925 | struct se_portal_group *tpg, | |
926 | struct se_lun *lun, | |
f2d30680 | 927 | u64 target_lun, |
c66ac9db | 928 | struct se_node_acl *nacl, |
f2d30680 | 929 | u64 mapped_lun) |
c66ac9db NB |
930 | { |
931 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 932 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
933 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
934 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
935 | u16 tpgt; | |
936 | ||
937 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
938 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
939 | /* | |
940 | * Copy Initiator Port information from struct se_node_acl | |
941 | */ | |
942 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
943 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
944 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
945 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
946 | /* |
947 | * Look for the matching registrations+reservation from those | |
948 | * created from APTPL metadata. Note that multiple registrations | |
949 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
950 | * TransportIDs. | |
951 | */ | |
952 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
953 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
954 | pr_reg_aptpl_list) { | |
92404e60 | 955 | |
6708bb27 | 956 | if (!strcmp(pr_reg->pr_iport, i_port) && |
29a05dee | 957 | (pr_reg->pr_res_mapped_lun == mapped_lun) && |
c66ac9db NB |
958 | !(strcmp(pr_reg->pr_tport, t_port)) && |
959 | (pr_reg->pr_reg_tpgt == tpgt) && | |
960 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
3ccd6e83 NB |
961 | /* |
962 | * Obtain the ->pr_reg_deve pointer + reference, that | |
963 | * is released by __core_scsi3_add_registration() below. | |
964 | */ | |
965 | rcu_read_lock(); | |
966 | pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); | |
967 | if (!pr_reg->pr_reg_deve) { | |
968 | pr_err("Unable to locate PR APTPL %s mapped_lun:" | |
969 | " %llu\n", nacl->initiatorname, mapped_lun); | |
970 | rcu_read_unlock(); | |
971 | continue; | |
972 | } | |
973 | kref_get(&pr_reg->pr_reg_deve->pr_kref); | |
974 | rcu_read_unlock(); | |
c66ac9db NB |
975 | |
976 | pr_reg->pr_reg_nacl = nacl; | |
adf653f9 | 977 | pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; |
c66ac9db NB |
978 | list_del(&pr_reg->pr_reg_aptpl_list); |
979 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
980 | /* | |
981 | * At this point all of the pointers in *pr_reg will | |
982 | * be setup, so go ahead and add the registration. | |
983 | */ | |
c66ac9db NB |
984 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); |
985 | /* | |
986 | * If this registration is the reservation holder, | |
987 | * make that happen now.. | |
988 | */ | |
989 | if (pr_reg->pr_res_holder) | |
990 | core_scsi3_aptpl_reserve(dev, tpg, | |
991 | nacl, pr_reg); | |
992 | /* | |
993 | * Reenable pr_aptpl_active to accept new metadata | |
994 | * updates once the SCSI device is active again.. | |
995 | */ | |
996 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
997 | pr_tmpl->pr_aptpl_active = 1; | |
998 | } | |
999 | } | |
1000 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | int core_scsi3_check_aptpl_registration( | |
1006 | struct se_device *dev, | |
1007 | struct se_portal_group *tpg, | |
1008 | struct se_lun *lun, | |
e2480563 | 1009 | struct se_node_acl *nacl, |
f2d30680 | 1010 | u64 mapped_lun) |
c66ac9db | 1011 | { |
d977f437 | 1012 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
c66ac9db NB |
1013 | return 0; |
1014 | ||
1015 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
29a05dee NB |
1016 | lun->unpacked_lun, nacl, |
1017 | mapped_lun); | |
c66ac9db NB |
1018 | } |
1019 | ||
1020 | static void __core_scsi3_dump_registration( | |
9ac8928e | 1021 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
1022 | struct se_device *dev, |
1023 | struct se_node_acl *nacl, | |
1024 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1025 | enum register_type register_type) |
c66ac9db NB |
1026 | { |
1027 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1028 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
1029 | |
1030 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1031 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1032 | |
6708bb27 | 1033 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
33ce6a87 AG |
1034 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? |
1035 | "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? | |
c66ac9db | 1036 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, |
d2843c17 | 1037 | i_buf); |
6708bb27 | 1038 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
1039 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1040 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1041 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1042 | " Port(s)\n", tfo->get_fabric_name(), |
1043 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1044 | dev->transport->name); |
6708bb27 | 1045 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1046 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1047 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1048 | pr_reg->pr_reg_aptpl); | |
1049 | } | |
1050 | ||
c66ac9db NB |
1051 | static void __core_scsi3_add_registration( |
1052 | struct se_device *dev, | |
1053 | struct se_node_acl *nacl, | |
1054 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1055 | enum register_type register_type, |
c66ac9db NB |
1056 | int register_move) |
1057 | { | |
9ac8928e | 1058 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 1059 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
0fd97ccf | 1060 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 | 1061 | struct se_dev_entry *deve; |
c66ac9db NB |
1062 | |
1063 | /* | |
1064 | * Increment PRgeneration counter for struct se_device upon a successful | |
1065 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1066 | * | |
1067 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1068 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1069 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1070 | * for the REGISTER. | |
1071 | */ | |
1072 | pr_reg->pr_res_generation = (register_move) ? | |
0fd97ccf | 1073 | dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1074 | core_scsi3_pr_generation(dev); |
1075 | ||
1076 | spin_lock(&pr_tmpl->registration_lock); | |
1077 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
c66ac9db NB |
1078 | |
1079 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1080 | spin_unlock(&pr_tmpl->registration_lock); | |
1081 | /* | |
1082 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1083 | */ | |
6708bb27 | 1084 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
3ccd6e83 | 1085 | goto out; |
c66ac9db NB |
1086 | /* |
1087 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1088 | * allocated in __core_scsi3_alloc_registration() | |
1089 | */ | |
1090 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1091 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
80bfdfa9 NB |
1092 | struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; |
1093 | ||
c66ac9db NB |
1094 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
1095 | ||
1096 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1097 | ||
1098 | spin_lock(&pr_tmpl->registration_lock); | |
1099 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1100 | &pr_tmpl->registration_list); | |
c66ac9db | 1101 | |
80bfdfa9 NB |
1102 | __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, |
1103 | register_type); | |
c66ac9db | 1104 | spin_unlock(&pr_tmpl->registration_lock); |
3ccd6e83 NB |
1105 | /* |
1106 | * Drop configfs group dependency reference and deve->pr_kref | |
1107 | * obtained from __core_scsi3_alloc_registration() code. | |
1108 | */ | |
80bfdfa9 NB |
1109 | rcu_read_lock(); |
1110 | deve = pr_reg_tmp->pr_reg_deve; | |
3ccd6e83 | 1111 | if (deve) { |
80bfdfa9 | 1112 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); |
3ccd6e83 NB |
1113 | core_scsi3_lunacl_undepend_item(deve); |
1114 | pr_reg_tmp->pr_reg_deve = NULL; | |
1115 | } | |
80bfdfa9 | 1116 | rcu_read_unlock(); |
c66ac9db | 1117 | } |
3ccd6e83 NB |
1118 | out: |
1119 | /* | |
1120 | * Drop deve->pr_kref obtained in __core_scsi3_do_alloc_registration() | |
1121 | */ | |
1122 | rcu_read_lock(); | |
1123 | deve = pr_reg->pr_reg_deve; | |
1124 | if (deve) { | |
1125 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1126 | kref_put(&deve->pr_kref, target_pr_kref_release); | |
1127 | pr_reg->pr_reg_deve = NULL; | |
1128 | } | |
1129 | rcu_read_unlock(); | |
c66ac9db NB |
1130 | } |
1131 | ||
1132 | static int core_scsi3_alloc_registration( | |
1133 | struct se_device *dev, | |
1134 | struct se_node_acl *nacl, | |
79dc9c9e | 1135 | struct se_lun *lun, |
c66ac9db | 1136 | struct se_dev_entry *deve, |
f2d30680 | 1137 | u64 mapped_lun, |
c66ac9db NB |
1138 | unsigned char *isid, |
1139 | u64 sa_res_key, | |
1140 | int all_tg_pt, | |
1141 | int aptpl, | |
33ce6a87 | 1142 | enum register_type register_type, |
c66ac9db NB |
1143 | int register_move) |
1144 | { | |
1145 | struct t10_pr_registration *pr_reg; | |
1146 | ||
79dc9c9e NB |
1147 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
1148 | isid, sa_res_key, all_tg_pt, | |
1149 | aptpl); | |
6708bb27 | 1150 | if (!pr_reg) |
e3d6f909 | 1151 | return -EPERM; |
c66ac9db NB |
1152 | |
1153 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1154 | register_type, register_move); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1159 | struct se_device *dev, | |
1160 | struct se_node_acl *nacl, | |
1161 | unsigned char *isid) | |
1162 | { | |
0fd97ccf | 1163 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1164 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1165 | struct se_portal_group *tpg; | |
1166 | ||
1167 | spin_lock(&pr_tmpl->registration_lock); | |
1168 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1169 | &pr_tmpl->registration_list, pr_reg_list) { | |
1170 | /* | |
1171 | * First look for a matching struct se_node_acl | |
1172 | */ | |
1173 | if (pr_reg->pr_reg_nacl != nacl) | |
1174 | continue; | |
1175 | ||
1176 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1177 | /* | |
1178 | * If this registration does NOT contain a fabric provided | |
1179 | * ISID, then we have found a match. | |
1180 | */ | |
6708bb27 | 1181 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1182 | /* |
1183 | * Determine if this SCSI device server requires that | |
1184 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1185 | * for fabric modules (iSCSI) requiring them. | |
1186 | */ | |
e3d6f909 | 1187 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
0fd97ccf | 1188 | if (dev->dev_attrib.enforce_pr_isids) |
c66ac9db NB |
1189 | continue; |
1190 | } | |
33940d09 | 1191 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1192 | spin_unlock(&pr_tmpl->registration_lock); |
1193 | return pr_reg; | |
1194 | } | |
1195 | /* | |
1196 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1197 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1198 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1199 | */ | |
6708bb27 | 1200 | if (!isid) |
c66ac9db NB |
1201 | continue; |
1202 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1203 | continue; | |
1204 | ||
33940d09 | 1205 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1206 | spin_unlock(&pr_tmpl->registration_lock); |
1207 | return pr_reg; | |
1208 | } | |
1209 | spin_unlock(&pr_tmpl->registration_lock); | |
1210 | ||
1211 | return NULL; | |
1212 | } | |
1213 | ||
1214 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1215 | struct se_device *dev, | |
1216 | struct se_node_acl *nacl, | |
1217 | struct se_session *sess) | |
1218 | { | |
1219 | struct se_portal_group *tpg = nacl->se_tpg; | |
1220 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1221 | ||
e3d6f909 | 1222 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1223 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1224 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1225 | PR_REG_ISID_LEN); |
1226 | isid_ptr = &buf[0]; | |
1227 | } | |
1228 | ||
1229 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1230 | } | |
1231 | ||
1232 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1233 | { | |
33940d09 | 1234 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1235 | } |
1236 | ||
125d0119 | 1237 | static int core_scsi3_check_implicit_release( |
c66ac9db NB |
1238 | struct se_device *dev, |
1239 | struct t10_pr_registration *pr_reg) | |
1240 | { | |
1241 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1242 | struct t10_pr_registration *pr_res_holder; | |
1243 | int ret = 0; | |
1244 | ||
1245 | spin_lock(&dev->dev_reservation_lock); | |
1246 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1247 | if (!pr_res_holder) { |
c66ac9db NB |
1248 | spin_unlock(&dev->dev_reservation_lock); |
1249 | return ret; | |
1250 | } | |
1251 | if (pr_res_holder == pr_reg) { | |
1252 | /* | |
125d0119 | 1253 | * Perform an implicit RELEASE if the registration that |
c66ac9db NB |
1254 | * is being released is holding the reservation. |
1255 | * | |
1256 | * From spc4r17, section 5.7.11.1: | |
1257 | * | |
1258 | * e) If the I_T nexus is the persistent reservation holder | |
1259 | * and the persistent reservation is not an all registrants | |
1260 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1261 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1262 | * service action with the SERVICE ACTION RESERVATION KEY | |
1263 | * field set to zero (see 5.7.11.3). | |
1264 | */ | |
6c3c9baa | 1265 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); |
c66ac9db NB |
1266 | ret = 1; |
1267 | /* | |
1268 | * For 'All Registrants' reservation types, all existing | |
1269 | * registrations are still processed as reservation holders | |
1270 | * in core_scsi3_pr_seq_non_holder() after the initial | |
125d0119 | 1271 | * reservation holder is implicitly released here. |
c66ac9db NB |
1272 | */ |
1273 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1274 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1275 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1276 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1277 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1278 | " UNREGISTER while existing reservation with matching" |
1279 | " key 0x%016Lx is present from another SCSI Initiator" | |
1280 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1281 | ret = -EPERM; |
c66ac9db NB |
1282 | } |
1283 | spin_unlock(&dev->dev_reservation_lock); | |
1284 | ||
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | /* | |
e3d6f909 | 1289 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1290 | */ |
1291 | static void __core_scsi3_free_registration( | |
1292 | struct se_device *dev, | |
1293 | struct t10_pr_registration *pr_reg, | |
1294 | struct list_head *preempt_and_abort_list, | |
1295 | int dec_holders) | |
cb0df4d3 BVA |
1296 | __releases(&pr_tmpl->registration_lock) |
1297 | __acquires(&pr_tmpl->registration_lock) | |
c66ac9db | 1298 | { |
9ac8928e | 1299 | const struct target_core_fabric_ops *tfo = |
c66ac9db | 1300 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
0fd97ccf | 1301 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 NB |
1302 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; |
1303 | struct se_dev_entry *deve; | |
c66ac9db | 1304 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
1305 | |
1306 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1307 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1308 | |
6c3c9baa NB |
1309 | if (!list_empty(&pr_reg->pr_reg_list)) |
1310 | list_del(&pr_reg->pr_reg_list); | |
c66ac9db NB |
1311 | /* |
1312 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1313 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1314 | */ | |
1315 | if (dec_holders) | |
1316 | core_scsi3_put_pr_reg(pr_reg); | |
80bfdfa9 NB |
1317 | |
1318 | spin_unlock(&pr_tmpl->registration_lock); | |
c66ac9db NB |
1319 | /* |
1320 | * Wait until all reference from any other I_T nexuses for this | |
1321 | * *pr_reg have been released. Because list_del() is called above, | |
1322 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1323 | * count back to zero, and we release *pr_reg. | |
1324 | */ | |
1325 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
6708bb27 | 1326 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1327 | tfo->get_fabric_name()); |
1328 | cpu_relax(); | |
c66ac9db NB |
1329 | } |
1330 | ||
80bfdfa9 NB |
1331 | rcu_read_lock(); |
1332 | deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); | |
1333 | if (deve) | |
1334 | clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1335 | rcu_read_unlock(); | |
1336 | ||
1337 | spin_lock(&pr_tmpl->registration_lock); | |
6708bb27 | 1338 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1339 | " Node: %s%s\n", tfo->get_fabric_name(), |
1340 | pr_reg->pr_reg_nacl->initiatorname, | |
d2843c17 | 1341 | i_buf); |
6708bb27 | 1342 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1343 | " Port(s)\n", tfo->get_fabric_name(), |
1344 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1345 | dev->transport->name); |
6708bb27 | 1346 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1347 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1348 | pr_reg->pr_res_generation); | |
1349 | ||
6708bb27 | 1350 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1351 | pr_reg->pr_reg_deve = NULL; |
1352 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
1353 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1354 | return; | |
1355 | } | |
1356 | /* | |
1357 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1358 | * are released once the ABORT_TASK_SET has completed.. | |
1359 | */ | |
1360 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1361 | } | |
1362 | ||
1363 | void core_scsi3_free_pr_reg_from_nacl( | |
1364 | struct se_device *dev, | |
1365 | struct se_node_acl *nacl) | |
1366 | { | |
0fd97ccf | 1367 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1368 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
6c3c9baa | 1369 | bool free_reg = false; |
c66ac9db NB |
1370 | /* |
1371 | * If the passed se_node_acl matches the reservation holder, | |
1372 | * release the reservation. | |
1373 | */ | |
1374 | spin_lock(&dev->dev_reservation_lock); | |
1375 | pr_res_holder = dev->dev_pr_res_holder; | |
1376 | if ((pr_res_holder != NULL) && | |
6c3c9baa NB |
1377 | (pr_res_holder->pr_reg_nacl == nacl)) { |
1378 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); | |
1379 | free_reg = true; | |
1380 | } | |
c66ac9db NB |
1381 | spin_unlock(&dev->dev_reservation_lock); |
1382 | /* | |
1383 | * Release any registration associated with the struct se_node_acl. | |
1384 | */ | |
1385 | spin_lock(&pr_tmpl->registration_lock); | |
6c3c9baa NB |
1386 | if (pr_res_holder && free_reg) |
1387 | __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); | |
1388 | ||
c66ac9db NB |
1389 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
1390 | &pr_tmpl->registration_list, pr_reg_list) { | |
1391 | ||
1392 | if (pr_reg->pr_reg_nacl != nacl) | |
1393 | continue; | |
1394 | ||
1395 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1396 | } | |
1397 | spin_unlock(&pr_tmpl->registration_lock); | |
1398 | } | |
1399 | ||
1400 | void core_scsi3_free_all_registrations( | |
1401 | struct se_device *dev) | |
1402 | { | |
0fd97ccf | 1403 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1404 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1405 | ||
1406 | spin_lock(&dev->dev_reservation_lock); | |
1407 | pr_res_holder = dev->dev_pr_res_holder; | |
1408 | if (pr_res_holder != NULL) { | |
1409 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1410 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 1411 | pr_res_holder, 0, 0); |
c66ac9db NB |
1412 | } |
1413 | spin_unlock(&dev->dev_reservation_lock); | |
1414 | ||
1415 | spin_lock(&pr_tmpl->registration_lock); | |
1416 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1417 | &pr_tmpl->registration_list, pr_reg_list) { | |
1418 | ||
1419 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1420 | } | |
1421 | spin_unlock(&pr_tmpl->registration_lock); | |
1422 | ||
1423 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1424 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1425 | pr_reg_aptpl_list) { | |
1426 | list_del(&pr_reg->pr_reg_aptpl_list); | |
c66ac9db NB |
1427 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1428 | } | |
1429 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1430 | } | |
1431 | ||
1432 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1433 | { | |
d588cf8f | 1434 | return target_depend_item(&tpg->tpg_group.cg_item); |
c66ac9db NB |
1435 | } |
1436 | ||
1437 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1438 | { | |
d588cf8f | 1439 | target_undepend_item(&tpg->tpg_group.cg_item); |
33940d09 | 1440 | atomic_dec_mb(&tpg->tpg_pr_ref_count); |
c66ac9db NB |
1441 | } |
1442 | ||
1443 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1444 | { | |
c66ac9db NB |
1445 | if (nacl->dynamic_node_acl) |
1446 | return 0; | |
d588cf8f | 1447 | return target_depend_item(&nacl->acl_group.cg_item); |
c66ac9db NB |
1448 | } |
1449 | ||
1450 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1451 | { | |
d588cf8f CH |
1452 | if (!nacl->dynamic_node_acl) |
1453 | target_undepend_item(&nacl->acl_group.cg_item); | |
33940d09 | 1454 | atomic_dec_mb(&nacl->acl_pr_ref_count); |
c66ac9db NB |
1455 | } |
1456 | ||
1457 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1458 | { | |
79dc9c9e | 1459 | struct se_lun_acl *lun_acl; |
c66ac9db NB |
1460 | struct se_node_acl *nacl; |
1461 | struct se_portal_group *tpg; | |
1462 | /* | |
1463 | * For nacl->dynamic_node_acl=1 | |
1464 | */ | |
79dc9c9e NB |
1465 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
1466 | atomic_read(&se_deve->pr_kref.refcount) != 0); | |
6708bb27 | 1467 | if (!lun_acl) |
c66ac9db NB |
1468 | return 0; |
1469 | ||
1470 | nacl = lun_acl->se_lun_nacl; | |
1471 | tpg = nacl->se_tpg; | |
1472 | ||
d588cf8f | 1473 | return target_depend_item(&lun_acl->se_lun_group.cg_item); |
c66ac9db NB |
1474 | } |
1475 | ||
1476 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1477 | { | |
29a05dee | 1478 | struct se_lun_acl *lun_acl; |
c66ac9db NB |
1479 | struct se_node_acl *nacl; |
1480 | struct se_portal_group *tpg; | |
1481 | /* | |
1482 | * For nacl->dynamic_node_acl=1 | |
1483 | */ | |
79dc9c9e NB |
1484 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
1485 | atomic_read(&se_deve->pr_kref.refcount) != 0); | |
6708bb27 | 1486 | if (!lun_acl) { |
29a05dee | 1487 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1488 | return; |
1489 | } | |
1490 | nacl = lun_acl->se_lun_nacl; | |
1491 | tpg = nacl->se_tpg; | |
1492 | ||
d588cf8f | 1493 | target_undepend_item(&lun_acl->se_lun_group.cg_item); |
29a05dee | 1494 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1495 | } |
1496 | ||
de103c93 CH |
1497 | static sense_reason_t |
1498 | core_scsi3_decode_spec_i_port( | |
c66ac9db NB |
1499 | struct se_cmd *cmd, |
1500 | struct se_portal_group *tpg, | |
1501 | unsigned char *l_isid, | |
1502 | u64 sa_res_key, | |
1503 | int all_tg_pt, | |
1504 | int aptpl) | |
1505 | { | |
5951146d | 1506 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1507 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; |
e3d6f909 | 1508 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db | 1509 | struct se_node_acl *dest_node_acl = NULL; |
79dc9c9e | 1510 | struct se_dev_entry *dest_se_deve = NULL; |
c66ac9db NB |
1511 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; |
1512 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1513 | LIST_HEAD(tid_dest_list); |
c66ac9db | 1514 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
2650d71e | 1515 | unsigned char *buf, *ptr, proto_ident; |
9b353cc8 | 1516 | const unsigned char *i_str = NULL; |
13ba564c | 1517 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 1518 | sense_reason_t ret; |
c66ac9db | 1519 | u32 tpdl, tid_len = 0; |
c66ac9db NB |
1520 | u32 dest_rtpi = 0; |
1521 | ||
c66ac9db NB |
1522 | /* |
1523 | * Allocate a struct pr_transport_id_holder and setup the | |
79dc9c9e NB |
1524 | * local_node_acl pointer and add to struct list_head tid_dest_list |
1525 | * for add registration processing in the loop of tid_dest_list below. | |
c66ac9db NB |
1526 | */ |
1527 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1528 | if (!tidh_new) { |
1529 | pr_err("Unable to allocate tidh_new\n"); | |
de103c93 | 1530 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1531 | } |
1532 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1533 | tidh_new->dest_tpg = tpg; | |
1534 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
c66ac9db | 1535 | |
5951146d | 1536 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1537 | se_sess->se_node_acl, cmd->se_lun, |
1538 | NULL, cmd->orig_fe_lun, l_isid, | |
c66ac9db | 1539 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 1540 | if (!local_pr_reg) { |
c66ac9db | 1541 | kfree(tidh_new); |
de103c93 | 1542 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1543 | } |
1544 | tidh_new->dest_pr_reg = local_pr_reg; | |
1545 | /* | |
1546 | * The local I_T nexus does not hold any configfs dependances, | |
79dc9c9e | 1547 | * so we set tidh_new->dest_se_deve to NULL to prevent the |
c66ac9db NB |
1548 | * configfs_undepend_item() calls in the tid_dest_list loops below. |
1549 | */ | |
79dc9c9e | 1550 | tidh_new->dest_se_deve = NULL; |
c66ac9db | 1551 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); |
05d1c7c0 | 1552 | |
0d7f1299 PB |
1553 | if (cmd->data_length < 28) { |
1554 | pr_warn("SPC-PR: Received PR OUT parameter list" | |
1555 | " length too small: %u\n", cmd->data_length); | |
de103c93 | 1556 | ret = TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
1557 | goto out; |
1558 | } | |
1559 | ||
4949314c | 1560 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1561 | if (!buf) { |
1562 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1563 | goto out; | |
1564 | } | |
1565 | ||
c66ac9db NB |
1566 | /* |
1567 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1568 | * first extract TransportID Parameter Data Length, and make sure | |
1569 | * the value matches up to the SCSI expected data transfer length. | |
1570 | */ | |
1571 | tpdl = (buf[24] & 0xff) << 24; | |
1572 | tpdl |= (buf[25] & 0xff) << 16; | |
1573 | tpdl |= (buf[26] & 0xff) << 8; | |
1574 | tpdl |= buf[27] & 0xff; | |
1575 | ||
1576 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1577 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1578 | " does not equal CDB data_length: %u\n", tpdl, |
1579 | cmd->data_length); | |
de103c93 CH |
1580 | ret = TCM_INVALID_PARAMETER_LIST; |
1581 | goto out_unmap; | |
c66ac9db NB |
1582 | } |
1583 | /* | |
1584 | * Start processing the received transport IDs using the | |
1585 | * receiving I_T Nexus portal's fabric dependent methods to | |
1586 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1587 | */ | |
1588 | ptr = &buf[28]; | |
1589 | ||
1590 | while (tpdl > 0) { | |
adf653f9 | 1591 | struct se_lun *dest_lun, *tmp_lun; |
79dc9c9e | 1592 | |
c66ac9db NB |
1593 | proto_ident = (ptr[0] & 0x0f); |
1594 | dest_tpg = NULL; | |
1595 | ||
1596 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
1597 | list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { |
1598 | tmp_tpg = tmp_lun->lun_tpg; | |
2650d71e | 1599 | |
c66ac9db NB |
1600 | /* |
1601 | * Look for the matching proto_ident provided by | |
1602 | * the received TransportID | |
1603 | */ | |
2aeeafae | 1604 | if (tmp_tpg->proto_id != proto_ident) |
c66ac9db | 1605 | continue; |
adf653f9 | 1606 | dest_rtpi = tmp_lun->lun_rtpi; |
c66ac9db | 1607 | |
2650d71e CH |
1608 | i_str = target_parse_pr_out_transport_id(tmp_tpg, |
1609 | (const char *)ptr, &tid_len, &iport_ptr); | |
6708bb27 | 1610 | if (!i_str) |
c66ac9db NB |
1611 | continue; |
1612 | ||
33940d09 | 1613 | atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); |
c66ac9db NB |
1614 | spin_unlock(&dev->se_port_lock); |
1615 | ||
de103c93 | 1616 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
6708bb27 | 1617 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db | 1618 | " for tmp_tpg\n"); |
33940d09 | 1619 | atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); |
de103c93 CH |
1620 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1621 | goto out_unmap; | |
c66ac9db NB |
1622 | } |
1623 | /* | |
35d1efe8 | 1624 | * Locate the destination initiator ACL to be registered |
c66ac9db NB |
1625 | * from the decoded fabric module specific TransportID |
1626 | * at *i_str. | |
1627 | */ | |
403edd78 | 1628 | mutex_lock(&tmp_tpg->acl_node_mutex); |
c66ac9db NB |
1629 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1630 | tmp_tpg, i_str); | |
33940d09 JE |
1631 | if (dest_node_acl) |
1632 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 1633 | mutex_unlock(&tmp_tpg->acl_node_mutex); |
c66ac9db | 1634 | |
6708bb27 | 1635 | if (!dest_node_acl) { |
c66ac9db NB |
1636 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1637 | spin_lock(&dev->se_port_lock); | |
1638 | continue; | |
1639 | } | |
1640 | ||
de103c93 | 1641 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
6708bb27 | 1642 | pr_err("configfs_depend_item() failed" |
c66ac9db | 1643 | " for dest_node_acl->acl_group\n"); |
33940d09 | 1644 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 1645 | core_scsi3_tpg_undepend_item(tmp_tpg); |
de103c93 CH |
1646 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1647 | goto out_unmap; | |
c66ac9db NB |
1648 | } |
1649 | ||
1650 | dest_tpg = tmp_tpg; | |
6708bb27 | 1651 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1652 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1653 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1654 | dest_node_acl->initiatorname, dest_rtpi); |
1655 | ||
1656 | spin_lock(&dev->se_port_lock); | |
1657 | break; | |
1658 | } | |
1659 | spin_unlock(&dev->se_port_lock); | |
1660 | ||
6708bb27 AG |
1661 | if (!dest_tpg) { |
1662 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1663 | " dest_tpg\n"); |
de103c93 CH |
1664 | ret = TCM_INVALID_PARAMETER_LIST; |
1665 | goto out_unmap; | |
c66ac9db | 1666 | } |
8b1e1244 | 1667 | |
6708bb27 | 1668 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1669 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1670 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db | 1671 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1672 | |
c66ac9db | 1673 | if (tid_len > tpdl) { |
6708bb27 | 1674 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1675 | " %u for Transport ID: %s\n", tid_len, ptr); |
1676 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1677 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1678 | ret = TCM_INVALID_PARAMETER_LIST; |
1679 | goto out_unmap; | |
c66ac9db NB |
1680 | } |
1681 | /* | |
1682 | * Locate the desintation struct se_dev_entry pointer for matching | |
1683 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1684 | * Target Port. | |
1685 | */ | |
1686 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1687 | dest_rtpi); | |
6708bb27 AG |
1688 | if (!dest_se_deve) { |
1689 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1690 | " from destination RTPI: %hu\n", |
e3d6f909 | 1691 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1692 | dest_rtpi); |
1693 | ||
1694 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1695 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1696 | ret = TCM_INVALID_PARAMETER_LIST; |
1697 | goto out_unmap; | |
c66ac9db NB |
1698 | } |
1699 | ||
de103c93 | 1700 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 1701 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db | 1702 | " failed\n"); |
29a05dee | 1703 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1704 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
1705 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1706 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1707 | goto out_unmap; | |
c66ac9db | 1708 | } |
8b1e1244 | 1709 | |
6708bb27 | 1710 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
f2d30680 | 1711 | " dest_se_deve mapped_lun: %llu\n", |
e3d6f909 | 1712 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 1713 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1714 | |
c66ac9db NB |
1715 | /* |
1716 | * Skip any TransportIDs that already have a registration for | |
1717 | * this target port. | |
1718 | */ | |
1719 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1720 | iport_ptr); | |
1721 | if (pr_reg_e) { | |
1722 | core_scsi3_put_pr_reg(pr_reg_e); | |
1723 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1724 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1725 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1726 | ptr += tid_len; | |
1727 | tpdl -= tid_len; | |
1728 | tid_len = 0; | |
1729 | continue; | |
1730 | } | |
1731 | /* | |
1732 | * Allocate a struct pr_transport_id_holder and setup | |
1733 | * the dest_node_acl and dest_se_deve pointers for the | |
1734 | * loop below. | |
1735 | */ | |
1736 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1737 | GFP_KERNEL); | |
6708bb27 AG |
1738 | if (!tidh_new) { |
1739 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1740 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1741 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1742 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1743 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1744 | goto out_unmap; | |
c66ac9db NB |
1745 | } |
1746 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1747 | tidh_new->dest_tpg = dest_tpg; | |
1748 | tidh_new->dest_node_acl = dest_node_acl; | |
1749 | tidh_new->dest_se_deve = dest_se_deve; | |
1750 | ||
1751 | /* | |
1752 | * Allocate, but do NOT add the registration for the | |
1753 | * TransportID referenced SCSI Initiator port. This | |
1754 | * done because of the following from spc4r17 in section | |
1755 | * 6.14.3 wrt SPEC_I_PT: | |
1756 | * | |
1757 | * "If a registration fails for any initiator port (e.g., if th | |
1758 | * logical unit does not have enough resources available to | |
1759 | * hold the registration information), no registrations shall be | |
1760 | * made, and the command shall be terminated with | |
1761 | * CHECK CONDITION status." | |
1762 | * | |
1763 | * That means we call __core_scsi3_alloc_registration() here, | |
1764 | * and then call __core_scsi3_add_registration() in the | |
1765 | * 2nd loop which will never fail. | |
1766 | */ | |
79dc9c9e NB |
1767 | dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
1768 | atomic_read(&dest_se_deve->pr_kref.refcount) != 0); | |
1769 | ||
5951146d | 1770 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1771 | dest_node_acl, dest_lun, dest_se_deve, |
1772 | dest_se_deve->mapped_lun, iport_ptr, | |
1773 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1774 | if (!dest_pr_reg) { |
c66ac9db NB |
1775 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1776 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1777 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1778 | kfree(tidh_new); | |
de103c93 CH |
1779 | ret = TCM_INVALID_PARAMETER_LIST; |
1780 | goto out_unmap; | |
c66ac9db NB |
1781 | } |
1782 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1783 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1784 | ||
1785 | ptr += tid_len; | |
1786 | tpdl -= tid_len; | |
1787 | tid_len = 0; | |
1788 | ||
1789 | } | |
05d1c7c0 | 1790 | |
4949314c | 1791 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1792 | |
c66ac9db NB |
1793 | /* |
1794 | * Go ahead and create a registrations from tid_dest_list for the | |
1795 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1796 | * and dest_se_deve. | |
1797 | * | |
1798 | * The SA Reservation Key from the PROUT is set for the | |
1799 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1800 | * means that the TransportID Initiator port will be | |
1801 | * registered on all of the target ports in the SCSI target device | |
1802 | * ALL_TG_PT=0 means the registration will only be for the | |
1803 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1804 | * was received. | |
1805 | */ | |
1806 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1807 | dest_tpg = tidh->dest_tpg; | |
1808 | dest_node_acl = tidh->dest_node_acl; | |
1809 | dest_se_deve = tidh->dest_se_deve; | |
1810 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1811 | |
1812 | list_del(&tidh->dest_list); | |
1813 | kfree(tidh); | |
1814 | ||
1815 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1816 | core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1817 | |
5951146d | 1818 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1819 | dest_pr_reg, 0, 0); |
1820 | ||
6708bb27 | 1821 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1822 | " registered Transport ID for Node: %s%s Mapped LUN:" |
f2d30680 | 1823 | " %llu\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
79dc9c9e NB |
1824 | dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? |
1825 | dest_se_deve->mapped_lun : 0); | |
c66ac9db | 1826 | |
3ccd6e83 NB |
1827 | if (!dest_se_deve) { |
1828 | kref_put(&local_pr_reg->pr_reg_deve->pr_kref, | |
1829 | target_pr_kref_release); | |
c66ac9db | 1830 | continue; |
3ccd6e83 | 1831 | } |
c66ac9db NB |
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 | ||
1837 | return 0; | |
de103c93 | 1838 | out_unmap: |
4949314c | 1839 | transport_kunmap_data_sg(cmd); |
de103c93 | 1840 | out: |
c66ac9db NB |
1841 | /* |
1842 | * For the failure case, release everything from tid_dest_list | |
1843 | * including *dest_pr_reg and the configfs dependances.. | |
1844 | */ | |
1845 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1846 | dest_tpg = tidh->dest_tpg; | |
1847 | dest_node_acl = tidh->dest_node_acl; | |
1848 | dest_se_deve = tidh->dest_se_deve; | |
1849 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1850 | |
1851 | list_del(&tidh->dest_list); | |
1852 | kfree(tidh); | |
1853 | /* | |
1854 | * Release any extra ALL_TG_PT=1 registrations for | |
1855 | * the SPEC_I_PT=1 case. | |
1856 | */ | |
1857 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1858 | &dest_pr_reg->pr_reg_atp_list, | |
1859 | pr_reg_atp_mem_list) { | |
1860 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1861 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1862 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1863 | } | |
1864 | ||
c66ac9db NB |
1865 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); |
1866 | ||
3ccd6e83 NB |
1867 | if (!dest_se_deve) { |
1868 | kref_put(&local_pr_reg->pr_reg_deve->pr_kref, | |
1869 | target_pr_kref_release); | |
c66ac9db | 1870 | continue; |
3ccd6e83 | 1871 | } |
c66ac9db NB |
1872 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1873 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1874 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1875 | } | |
1876 | return ret; | |
1877 | } | |
1878 | ||
3c8a6228 | 1879 | static int core_scsi3_update_aptpl_buf( |
c66ac9db NB |
1880 | struct se_device *dev, |
1881 | unsigned char *buf, | |
0607decd | 1882 | u32 pr_aptpl_buf_len) |
c66ac9db | 1883 | { |
c66ac9db | 1884 | struct se_portal_group *tpg; |
c66ac9db NB |
1885 | struct t10_pr_registration *pr_reg; |
1886 | unsigned char tmp[512], isid_buf[32]; | |
1887 | ssize_t len = 0; | |
1888 | int reg_count = 0; | |
3c8a6228 | 1889 | int ret = 0; |
c66ac9db | 1890 | |
3c8a6228 AG |
1891 | spin_lock(&dev->dev_reservation_lock); |
1892 | spin_lock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1893 | /* |
1894 | * Walk the registration list.. | |
1895 | */ | |
0fd97ccf | 1896 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
c66ac9db NB |
1897 | pr_reg_list) { |
1898 | ||
1899 | tmp[0] = '\0'; | |
1900 | isid_buf[0] = '\0'; | |
1901 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
c66ac9db NB |
1902 | /* |
1903 | * Write out any ISID value to APTPL metadata that was included | |
1904 | * in the original registration. | |
1905 | */ | |
1906 | if (pr_reg->isid_present_at_reg) | |
1907 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1908 | pr_reg->pr_reg_isid); | |
1909 | /* | |
1910 | * Include special metadata if the pr_reg matches the | |
1911 | * reservation holder. | |
1912 | */ | |
1913 | if (dev->dev_pr_res_holder == pr_reg) { | |
1914 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1915 | "\ninitiator_fabric=%s\n" | |
1916 | "initiator_node=%s\n%s" | |
1917 | "sa_res_key=%llu\n" | |
1918 | "res_holder=1\nres_type=%02x\n" | |
1919 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
f2d30680 | 1920 | "mapped_lun=%llu\n", reg_count, |
e3d6f909 | 1921 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1922 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1923 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1924 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1925 | pr_reg->pr_res_mapped_lun); | |
1926 | } else { | |
1927 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1928 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1929 | "sa_res_key=%llu\nres_holder=0\n" | |
f2d30680 | 1930 | "res_all_tg_pt=%d\nmapped_lun=%llu\n", |
e3d6f909 | 1931 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1932 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1933 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1934 | pr_reg->pr_res_mapped_lun); | |
1935 | } | |
1936 | ||
60d645a4 | 1937 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1938 | pr_err("Unable to update renaming APTPL metadata," |
1939 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1940 | ret = -EMSGSIZE; |
1941 | goto out; | |
c66ac9db NB |
1942 | } |
1943 | len += sprintf(buf+len, "%s", tmp); | |
1944 | ||
1945 | /* | |
1946 | * Include information about the associated SCSI target port. | |
1947 | */ | |
1948 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
f2d30680 | 1949 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%llu\nPR_REG_END:" |
e3d6f909 AG |
1950 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1951 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1952 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
79dc9c9e NB |
1953 | pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, |
1954 | reg_count); | |
c66ac9db | 1955 | |
60d645a4 | 1956 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1957 | pr_err("Unable to update renaming APTPL metadata," |
1958 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1959 | ret = -EMSGSIZE; |
1960 | goto out; | |
c66ac9db NB |
1961 | } |
1962 | len += sprintf(buf+len, "%s", tmp); | |
1963 | reg_count++; | |
1964 | } | |
c66ac9db | 1965 | |
6708bb27 | 1966 | if (!reg_count) |
c66ac9db NB |
1967 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1968 | ||
3c8a6228 AG |
1969 | out: |
1970 | spin_unlock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1971 | spin_unlock(&dev->dev_reservation_lock); |
1972 | ||
1973 | return ret; | |
1974 | } | |
1975 | ||
c66ac9db NB |
1976 | static int __core_scsi3_write_aptpl_to_file( |
1977 | struct se_device *dev, | |
4dee96fb | 1978 | unsigned char *buf) |
c66ac9db | 1979 | { |
0fd97ccf | 1980 | struct t10_wwn *wwn = &dev->t10_wwn; |
c66ac9db | 1981 | struct file *file; |
c66ac9db NB |
1982 | int flags = O_RDWR | O_CREAT | O_TRUNC; |
1983 | char path[512]; | |
4dee96fb | 1984 | u32 pr_aptpl_buf_len; |
c66ac9db NB |
1985 | int ret; |
1986 | ||
c66ac9db NB |
1987 | memset(path, 0, 512); |
1988 | ||
60d645a4 | 1989 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 1990 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 1991 | " into path buffer\n"); |
e3d6f909 | 1992 | return -EMSGSIZE; |
c66ac9db NB |
1993 | } |
1994 | ||
1995 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
1996 | file = filp_open(path, flags, 0600); | |
0e9b10a9 | 1997 | if (IS_ERR(file)) { |
6708bb27 | 1998 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 1999 | " failed\n", path); |
0e9b10a9 | 2000 | return PTR_ERR(file); |
c66ac9db NB |
2001 | } |
2002 | ||
4dee96fb | 2003 | pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ |
c66ac9db | 2004 | |
0e9b10a9 | 2005 | ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); |
c66ac9db | 2006 | |
0e9b10a9 | 2007 | if (ret < 0) |
6708bb27 | 2008 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
0e9b10a9 | 2009 | fput(file); |
c66ac9db | 2010 | |
f730f915 | 2011 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
2012 | } |
2013 | ||
459f213b AG |
2014 | /* |
2015 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
2016 | * write out the updated metadata to struct file for this SCSI device. | |
2017 | */ | |
8a391857 | 2018 | static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) |
c66ac9db | 2019 | { |
8a391857 | 2020 | unsigned char *buf; |
f161d4b4 | 2021 | int rc, len = PR_APTPL_BUF_LEN; |
de103c93 | 2022 | |
459f213b AG |
2023 | if (!aptpl) { |
2024 | char *null_buf = "No Registrations or Reservations\n"; | |
2025 | ||
8a391857 | 2026 | rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); |
459f213b AG |
2027 | dev->t10_pr.pr_aptpl_active = 0; |
2028 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); | |
459f213b | 2029 | |
8a391857 NB |
2030 | if (rc) |
2031 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
459f213b | 2032 | |
8a391857 NB |
2033 | return 0; |
2034 | } | |
f161d4b4 NB |
2035 | retry: |
2036 | buf = vzalloc(len); | |
8a391857 NB |
2037 | if (!buf) |
2038 | return TCM_OUT_OF_RESOURCES; | |
2039 | ||
f161d4b4 | 2040 | rc = core_scsi3_update_aptpl_buf(dev, buf, len); |
8a391857 | 2041 | if (rc < 0) { |
f161d4b4 NB |
2042 | vfree(buf); |
2043 | len *= 2; | |
2044 | goto retry; | |
c66ac9db NB |
2045 | } |
2046 | ||
8a391857 NB |
2047 | rc = __core_scsi3_write_aptpl_to_file(dev, buf); |
2048 | if (rc != 0) { | |
2049 | pr_err("SPC-3 PR: Could not update APTPL\n"); | |
f161d4b4 | 2050 | vfree(buf); |
8a391857 NB |
2051 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2052 | } | |
2053 | dev->t10_pr.pr_aptpl_active = 1; | |
f161d4b4 | 2054 | vfree(buf); |
8a391857 NB |
2055 | pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); |
2056 | return 0; | |
c66ac9db NB |
2057 | } |
2058 | ||
de103c93 CH |
2059 | static sense_reason_t |
2060 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, | |
bc118fe4 | 2061 | bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) |
c66ac9db | 2062 | { |
e3d6f909 | 2063 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2064 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2065 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2066 | struct se_portal_group *se_tpg; |
bc118fe4 | 2067 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; |
0fd97ccf | 2068 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2069 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
a0d50f62 | 2070 | sense_reason_t ret = TCM_NO_SENSE; |
fc09149d | 2071 | int pr_holder = 0, type; |
c66ac9db | 2072 | |
6708bb27 AG |
2073 | if (!se_sess || !se_lun) { |
2074 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2075 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2076 | } |
2077 | se_tpg = se_sess->se_tpg; | |
c66ac9db | 2078 | |
e3d6f909 | 2079 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2080 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2081 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2082 | PR_REG_ISID_LEN); |
2083 | isid_ptr = &isid_buf[0]; | |
2084 | } | |
2085 | /* | |
2086 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2087 | */ | |
bc118fe4 AG |
2088 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
2089 | if (!pr_reg) { | |
c66ac9db | 2090 | if (res_key) { |
6708bb27 | 2091 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2092 | " for SA REGISTER, returning CONFLICT\n"); |
de103c93 | 2093 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2094 | } |
2095 | /* | |
2096 | * Do nothing but return GOOD status. | |
2097 | */ | |
6708bb27 | 2098 | if (!sa_res_key) |
03e98c9e | 2099 | return 0; |
c66ac9db | 2100 | |
6708bb27 | 2101 | if (!spec_i_pt) { |
c66ac9db NB |
2102 | /* |
2103 | * Perform the Service Action REGISTER on the Initiator | |
2104 | * Port Endpoint that the PRO was received from on the | |
2105 | * Logical Unit of the SCSI device server. | |
2106 | */ | |
de103c93 | 2107 | if (core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
2108 | se_sess->se_node_acl, cmd->se_lun, |
2109 | NULL, cmd->orig_fe_lun, isid_ptr, | |
c66ac9db | 2110 | sa_res_key, all_tg_pt, aptpl, |
33ce6a87 | 2111 | register_type, 0)) { |
6708bb27 | 2112 | pr_err("Unable to allocate" |
c66ac9db | 2113 | " struct t10_pr_registration\n"); |
de103c93 | 2114 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2115 | } |
2116 | } else { | |
2117 | /* | |
2118 | * Register both the Initiator port that received | |
2119 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2120 | * TransportID from Parameter list and loop through | |
2121 | * fabric dependent parameter list while calling | |
2122 | * logic from of core_scsi3_alloc_registration() for | |
2123 | * each TransportID provided SCSI Initiator Port/Device | |
2124 | */ | |
2125 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2126 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2127 | if (ret != 0) | |
2128 | return ret; | |
2129 | } | |
459f213b | 2130 | return core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 CH |
2131 | } |
2132 | ||
bc118fe4 AG |
2133 | /* ok, existing registration */ |
2134 | ||
2135 | if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { | |
2136 | pr_err("SPC-3 PR REGISTER: Received" | |
2137 | " res_key: 0x%016Lx does not match" | |
2138 | " existing SA REGISTER res_key:" | |
2139 | " 0x%016Lx\n", res_key, | |
2140 | pr_reg->pr_res_key); | |
2141 | ret = TCM_RESERVATION_CONFLICT; | |
2142 | goto out; | |
de103c93 CH |
2143 | } |
2144 | ||
2145 | if (spec_i_pt) { | |
1f070cc2 AG |
2146 | pr_err("SPC-3 PR REGISTER: SPEC_I_PT" |
2147 | " set on a registered nexus\n"); | |
de103c93 | 2148 | ret = TCM_INVALID_PARAMETER_LIST; |
bc118fe4 | 2149 | goto out; |
de103c93 CH |
2150 | } |
2151 | ||
2152 | /* | |
2153 | * An existing ALL_TG_PT=1 registration being released | |
2154 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2155 | */ | |
1f070cc2 AG |
2156 | if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { |
2157 | pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" | |
de103c93 CH |
2158 | " registration exists, but ALL_TG_PT=1 bit not" |
2159 | " present in received PROUT\n"); | |
2160 | ret = TCM_INVALID_CDB_FIELD; | |
bc118fe4 | 2161 | goto out; |
de103c93 CH |
2162 | } |
2163 | ||
de103c93 | 2164 | /* |
51d9c41d | 2165 | * sa_res_key=1 Change Reservation Key for registered I_T Nexus. |
de103c93 | 2166 | */ |
51d9c41d AG |
2167 | if (sa_res_key) { |
2168 | /* | |
2169 | * Increment PRgeneration counter for struct se_device" | |
2170 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2171 | * READ_KEYS service action. | |
2172 | */ | |
2173 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); | |
2174 | pr_reg->pr_res_key = sa_res_key; | |
2175 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2176 | " Key for %s to: 0x%016Lx PRgeneration:" | |
2177 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), | |
2178 | (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", | |
2179 | pr_reg->pr_reg_nacl->initiatorname, | |
2180 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2181 | ||
2182 | } else { | |
2183 | /* | |
2184 | * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. | |
2185 | */ | |
6c3c9baa NB |
2186 | type = pr_reg->pr_res_type; |
2187 | pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, | |
2188 | pr_reg); | |
de103c93 | 2189 | if (pr_holder < 0) { |
de103c93 | 2190 | ret = TCM_RESERVATION_CONFLICT; |
bc118fe4 | 2191 | goto out; |
c66ac9db | 2192 | } |
de103c93 CH |
2193 | |
2194 | spin_lock(&pr_tmpl->registration_lock); | |
c66ac9db | 2195 | /* |
de103c93 CH |
2196 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
2197 | * and matching pr_res_key. | |
c66ac9db | 2198 | */ |
de103c93 CH |
2199 | if (pr_reg->pr_reg_all_tg_pt) { |
2200 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2201 | &pr_tmpl->registration_list, | |
2202 | pr_reg_list) { | |
2203 | ||
2204 | if (!pr_reg_p->pr_reg_all_tg_pt) | |
2205 | continue; | |
2206 | if (pr_reg_p->pr_res_key != res_key) | |
2207 | continue; | |
2208 | if (pr_reg == pr_reg_p) | |
2209 | continue; | |
2210 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2211 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2212 | continue; | |
2213 | ||
2214 | __core_scsi3_free_registration(dev, | |
2215 | pr_reg_p, NULL, 0); | |
c66ac9db NB |
2216 | } |
2217 | } | |
de103c93 | 2218 | |
c66ac9db | 2219 | /* |
de103c93 | 2220 | * Release the calling I_T Nexus registration now.. |
c66ac9db | 2221 | */ |
de103c93 | 2222 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
fc09149d | 2223 | pr_reg = NULL; |
c66ac9db | 2224 | |
de103c93 CH |
2225 | /* |
2226 | * From spc4r17, section 5.7.11.3 Unregistering | |
2227 | * | |
2228 | * If the persistent reservation is a registrants only | |
2229 | * type, the device server shall establish a unit | |
2230 | * attention condition for the initiator port associated | |
2231 | * with every registered I_T nexus except for the I_T | |
2232 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2233 | * received, with the additional sense code set to | |
2234 | * RESERVATIONS RELEASED. | |
2235 | */ | |
2236 | if (pr_holder && | |
fc09149d NB |
2237 | (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || |
2238 | type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { | |
de103c93 CH |
2239 | list_for_each_entry(pr_reg_p, |
2240 | &pr_tmpl->registration_list, | |
2241 | pr_reg_list) { | |
2242 | ||
c51c8e7b | 2243 | target_ua_allocate_lun( |
de103c93 CH |
2244 | pr_reg_p->pr_reg_nacl, |
2245 | pr_reg_p->pr_res_mapped_lun, | |
2246 | 0x2A, | |
2247 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
c66ac9db | 2248 | } |
de103c93 | 2249 | } |
c66ac9db | 2250 | |
51d9c41d | 2251 | spin_unlock(&pr_tmpl->registration_lock); |
de103c93 | 2252 | } |
c66ac9db | 2253 | |
459f213b | 2254 | ret = core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 | 2255 | |
bc118fe4 | 2256 | out: |
fc09149d NB |
2257 | if (pr_reg) |
2258 | core_scsi3_put_pr_reg(pr_reg); | |
de103c93 | 2259 | return ret; |
c66ac9db NB |
2260 | } |
2261 | ||
2262 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2263 | { | |
2264 | switch (type) { | |
2265 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2266 | return "Write Exclusive Access"; | |
2267 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2268 | return "Exclusive Access"; | |
2269 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2270 | return "Write Exclusive Access, Registrants Only"; | |
2271 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2272 | return "Exclusive Access, Registrants Only"; | |
2273 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2274 | return "Write Exclusive Access, All Registrants"; | |
2275 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2276 | return "Exclusive Access, All Registrants"; | |
2277 | default: | |
2278 | break; | |
2279 | } | |
2280 | ||
2281 | return "Unknown SPC-3 PR Type"; | |
2282 | } | |
2283 | ||
de103c93 CH |
2284 | static sense_reason_t |
2285 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) | |
c66ac9db | 2286 | { |
de103c93 | 2287 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2288 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2289 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2290 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
0fd97ccf | 2291 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2292 | char i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 2293 | sense_reason_t ret; |
c66ac9db NB |
2294 | |
2295 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2296 | ||
6708bb27 AG |
2297 | if (!se_sess || !se_lun) { |
2298 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2299 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2300 | } |
c66ac9db NB |
2301 | /* |
2302 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2303 | */ | |
5951146d | 2304 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2305 | se_sess); |
6708bb27 AG |
2306 | if (!pr_reg) { |
2307 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2308 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
de103c93 | 2309 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2310 | } |
2311 | /* | |
2312 | * From spc4r17 Section 5.7.9: Reserving: | |
2313 | * | |
2314 | * An application client creates a persistent reservation by issuing | |
2315 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2316 | * a registered I_T nexus with the following parameters: | |
2317 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2318 | * registered with the logical unit for the I_T nexus; and | |
2319 | */ | |
2320 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2321 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2322 | " does not match existing SA REGISTER res_key:" |
2323 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
2324 | ret = TCM_RESERVATION_CONFLICT; |
2325 | goto out_put_pr_reg; | |
c66ac9db NB |
2326 | } |
2327 | /* | |
2328 | * From spc4r17 Section 5.7.9: Reserving: | |
2329 | * | |
2330 | * From above: | |
2331 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2332 | * being created. | |
2333 | * | |
2334 | * Only one persistent reservation is allowed at a time per logical unit | |
2335 | * and that persistent reservation has a scope of LU_SCOPE. | |
2336 | */ | |
2337 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2338 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
de103c93 CH |
2339 | ret = TCM_INVALID_PARAMETER_LIST; |
2340 | goto out_put_pr_reg; | |
c66ac9db NB |
2341 | } |
2342 | /* | |
2343 | * See if we have an existing PR reservation holder pointer at | |
2344 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2345 | * *pr_res_holder. | |
2346 | */ | |
2347 | spin_lock(&dev->dev_reservation_lock); | |
2348 | pr_res_holder = dev->dev_pr_res_holder; | |
ee1b1b9c | 2349 | if (pr_res_holder) { |
c66ac9db NB |
2350 | /* |
2351 | * From spc4r17 Section 5.7.9: Reserving: | |
2352 | * | |
2353 | * If the device server receives a PERSISTENT RESERVE OUT | |
2354 | * command from an I_T nexus other than a persistent reservation | |
2355 | * holder (see 5.7.10) that attempts to create a persistent | |
2356 | * reservation when a persistent reservation already exists for | |
2357 | * the logical unit, then the command shall be completed with | |
2358 | * RESERVATION CONFLICT status. | |
2359 | */ | |
e673dc92 | 2360 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2361 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
6708bb27 | 2362 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2363 | " [%s]: %s while reservation already held by" |
2364 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2365 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2366 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2367 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2368 | pr_res_holder->pr_reg_nacl->initiatorname); |
2369 | ||
2370 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2371 | ret = TCM_RESERVATION_CONFLICT; |
2372 | goto out_put_pr_reg; | |
c66ac9db NB |
2373 | } |
2374 | /* | |
2375 | * From spc4r17 Section 5.7.9: Reserving: | |
2376 | * | |
2377 | * If a persistent reservation holder attempts to modify the | |
2378 | * type or scope of an existing persistent reservation, the | |
2379 | * command shall be completed with RESERVATION CONFLICT status. | |
2380 | */ | |
2381 | if ((pr_res_holder->pr_res_type != type) || | |
2382 | (pr_res_holder->pr_res_scope != scope)) { | |
2383 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2384 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2385 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2386 | " while reservation already held by [%s]: %s," | |
2387 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2388 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2389 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2390 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2391 | pr_res_holder->pr_reg_nacl->initiatorname); |
2392 | ||
2393 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2394 | ret = TCM_RESERVATION_CONFLICT; |
2395 | goto out_put_pr_reg; | |
c66ac9db NB |
2396 | } |
2397 | /* | |
2398 | * From spc4r17 Section 5.7.9: Reserving: | |
2399 | * | |
2400 | * If the device server receives a PERSISTENT RESERVE OUT | |
2401 | * command with RESERVE service action where the TYPE field and | |
2402 | * the SCOPE field contain the same values as the existing type | |
2403 | * and scope from a persistent reservation holder, it shall not | |
2404 | * make any change to the existing persistent reservation and | |
2405 | * shall completethe command with GOOD status. | |
2406 | */ | |
2407 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2408 | ret = 0; |
2409 | goto out_put_pr_reg; | |
c66ac9db NB |
2410 | } |
2411 | /* | |
2412 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2413 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2414 | */ | |
2415 | pr_reg->pr_res_scope = scope; | |
2416 | pr_reg->pr_res_type = type; | |
2417 | pr_reg->pr_res_holder = 1; | |
2418 | dev->dev_pr_res_holder = pr_reg; | |
d2843c17 | 2419 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2420 | |
6708bb27 | 2421 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2422 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2423 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2424 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2425 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2426 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2427 | se_sess->se_node_acl->initiatorname, |
d2843c17 | 2428 | i_buf); |
c66ac9db NB |
2429 | spin_unlock(&dev->dev_reservation_lock); |
2430 | ||
459f213b AG |
2431 | if (pr_tmpl->pr_aptpl_active) |
2432 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db | 2433 | |
de103c93 CH |
2434 | ret = 0; |
2435 | out_put_pr_reg: | |
c66ac9db | 2436 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2437 | return ret; |
c66ac9db NB |
2438 | } |
2439 | ||
de103c93 CH |
2440 | static sense_reason_t |
2441 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, | |
2442 | u64 res_key) | |
c66ac9db | 2443 | { |
c66ac9db NB |
2444 | switch (type) { |
2445 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2446 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2447 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2448 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2449 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2450 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 2451 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
c66ac9db | 2452 | default: |
6708bb27 | 2453 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2454 | " 0x%02x\n", type); |
de103c93 | 2455 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 2456 | } |
c66ac9db NB |
2457 | } |
2458 | ||
2459 | /* | |
2460 | * Called with struct se_device->dev_reservation_lock held. | |
2461 | */ | |
2462 | static void __core_scsi3_complete_pro_release( | |
2463 | struct se_device *dev, | |
2464 | struct se_node_acl *se_nacl, | |
2465 | struct t10_pr_registration *pr_reg, | |
6c3c9baa NB |
2466 | int explicit, |
2467 | int unreg) | |
c66ac9db | 2468 | { |
9ac8928e | 2469 | const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2470 | char i_buf[PR_REG_ISID_ID_LEN]; |
6c3c9baa | 2471 | int pr_res_type = 0, pr_res_scope = 0; |
c66ac9db NB |
2472 | |
2473 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2474 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
2475 | /* |
2476 | * Go ahead and release the current PR reservation holder. | |
6c3c9baa NB |
2477 | * If an All Registrants reservation is currently active and |
2478 | * a unregister operation is requested, replace the current | |
2479 | * dev_pr_res_holder with another active registration. | |
2480 | */ | |
2481 | if (dev->dev_pr_res_holder) { | |
2482 | pr_res_type = dev->dev_pr_res_holder->pr_res_type; | |
2483 | pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; | |
2484 | dev->dev_pr_res_holder->pr_res_type = 0; | |
2485 | dev->dev_pr_res_holder->pr_res_scope = 0; | |
2486 | dev->dev_pr_res_holder->pr_res_holder = 0; | |
2487 | dev->dev_pr_res_holder = NULL; | |
2488 | } | |
2489 | if (!unreg) | |
2490 | goto out; | |
c66ac9db | 2491 | |
6c3c9baa NB |
2492 | spin_lock(&dev->t10_pr.registration_lock); |
2493 | list_del_init(&pr_reg->pr_reg_list); | |
2494 | /* | |
2495 | * If the I_T nexus is a reservation holder, the persistent reservation | |
2496 | * is of an all registrants type, and the I_T nexus is the last remaining | |
2497 | * registered I_T nexus, then the device server shall also release the | |
2498 | * persistent reservation. | |
2499 | */ | |
2500 | if (!list_empty(&dev->t10_pr.registration_list) && | |
2501 | ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2502 | (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { | |
2503 | dev->dev_pr_res_holder = | |
2504 | list_entry(dev->t10_pr.registration_list.next, | |
2505 | struct t10_pr_registration, pr_reg_list); | |
2506 | dev->dev_pr_res_holder->pr_res_type = pr_res_type; | |
2507 | dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; | |
2508 | dev->dev_pr_res_holder->pr_res_holder = 1; | |
2509 | } | |
2510 | spin_unlock(&dev->t10_pr.registration_lock); | |
2511 | out: | |
2512 | if (!dev->dev_pr_res_holder) { | |
2513 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" | |
2514 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2515 | tfo->get_fabric_name(), (explicit) ? "explicit" : | |
2516 | "implicit", core_scsi3_pr_dump_type(pr_res_type), | |
2517 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2518 | } | |
6708bb27 | 2519 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db | 2520 | tfo->get_fabric_name(), se_nacl->initiatorname, |
d2843c17 | 2521 | i_buf); |
c66ac9db NB |
2522 | /* |
2523 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2524 | */ | |
2525 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2526 | } | |
2527 | ||
de103c93 CH |
2528 | static sense_reason_t |
2529 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, | |
2530 | u64 res_key) | |
c66ac9db NB |
2531 | { |
2532 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2533 | struct se_session *se_sess = cmd->se_sess; |
2534 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2535 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
0fd97ccf | 2536 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
de103c93 | 2537 | sense_reason_t ret = 0; |
c66ac9db | 2538 | |
6708bb27 AG |
2539 | if (!se_sess || !se_lun) { |
2540 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2541 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2542 | } |
2543 | /* | |
2544 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2545 | */ | |
2546 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2547 | if (!pr_reg) { |
2548 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2549 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
de103c93 | 2550 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2551 | } |
2552 | /* | |
2553 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2554 | * | |
2555 | * If there is no persistent reservation or in response to a persistent | |
2556 | * reservation release request from a registered I_T nexus that is not a | |
2557 | * persistent reservation holder (see 5.7.10), the device server shall | |
2558 | * do the following: | |
2559 | * | |
2560 | * a) Not release the persistent reservation, if any; | |
2561 | * b) Not remove any registrations; and | |
2562 | * c) Complete the command with GOOD status. | |
2563 | */ | |
2564 | spin_lock(&dev->dev_reservation_lock); | |
2565 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2566 | if (!pr_res_holder) { |
c66ac9db NB |
2567 | /* |
2568 | * No persistent reservation, return GOOD status. | |
2569 | */ | |
2570 | spin_unlock(&dev->dev_reservation_lock); | |
bb7a8c8e | 2571 | goto out_put_pr_reg; |
c66ac9db | 2572 | } |
c66ac9db | 2573 | |
e673dc92 | 2574 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2575 | /* |
c66ac9db NB |
2576 | * Release request from a registered I_T nexus that is not a |
2577 | * persistent reservation holder. return GOOD status. | |
2578 | */ | |
2579 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 2580 | goto out_put_pr_reg; |
c66ac9db | 2581 | } |
de103c93 | 2582 | |
c66ac9db NB |
2583 | /* |
2584 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2585 | * | |
2586 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2587 | * release a persistent reservation. | |
2588 | * | |
2589 | * An application client releases the persistent reservation by issuing | |
2590 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2591 | * an I_T nexus that is a persistent reservation holder with the | |
2592 | * following parameters: | |
2593 | * | |
2594 | * a) RESERVATION KEY field set to the value of the reservation key | |
2595 | * that is registered with the logical unit for the I_T nexus; | |
2596 | */ | |
2597 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2598 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2599 | " does not match existing SA REGISTER res_key:" |
2600 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2601 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2602 | ret = TCM_RESERVATION_CONFLICT; |
2603 | goto out_put_pr_reg; | |
c66ac9db NB |
2604 | } |
2605 | /* | |
2606 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2607 | * | |
2608 | * b) TYPE field and SCOPE field set to match the persistent | |
2609 | * reservation being released. | |
2610 | */ | |
2611 | if ((pr_res_holder->pr_res_type != type) || | |
2612 | (pr_res_holder->pr_res_scope != scope)) { | |
2613 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2614 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2615 | " reservation from [%s]: %s with different TYPE " |
2616 | "and/or SCOPE while reservation already held by" | |
2617 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2618 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2619 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2620 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2621 | pr_res_holder->pr_reg_nacl->initiatorname); |
2622 | ||
2623 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2624 | ret = TCM_RESERVATION_CONFLICT; |
2625 | goto out_put_pr_reg; | |
c66ac9db NB |
2626 | } |
2627 | /* | |
2628 | * In response to a persistent reservation release request from the | |
2629 | * persistent reservation holder the device server shall perform a | |
2630 | * release by doing the following as an uninterrupted series of actions: | |
2631 | * a) Release the persistent reservation; | |
2632 | * b) Not remove any registration(s); | |
2633 | * c) If the released persistent reservation is a registrants only type | |
2634 | * or all registrants type persistent reservation, | |
2635 | * the device server shall establish a unit attention condition for | |
2636 | * the initiator port associated with every regis- | |
2637 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2638 | * RESERVE OUT command with RELEASE service action was received, | |
2639 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2640 | * d) If the persistent reservation is of any other type, the device | |
2641 | * server shall not establish a unit attention condition. | |
2642 | */ | |
2643 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
6c3c9baa | 2644 | pr_reg, 1, 0); |
c66ac9db NB |
2645 | |
2646 | spin_unlock(&dev->dev_reservation_lock); | |
2647 | ||
2648 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2649 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2650 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2651 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2652 | /* | |
2653 | * If no UNIT ATTENTION conditions will be established for | |
2654 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2655 | * go ahead and check for APTPL=1 update+write below | |
2656 | */ | |
2657 | goto write_aptpl; | |
2658 | } | |
2659 | ||
2660 | spin_lock(&pr_tmpl->registration_lock); | |
2661 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2662 | pr_reg_list) { | |
2663 | /* | |
2664 | * Do not establish a UNIT ATTENTION condition | |
2665 | * for the calling I_T Nexus | |
2666 | */ | |
2667 | if (pr_reg_p == pr_reg) | |
2668 | continue; | |
2669 | ||
c51c8e7b | 2670 | target_ua_allocate_lun(pr_reg_p->pr_reg_nacl, |
c66ac9db NB |
2671 | pr_reg_p->pr_res_mapped_lun, |
2672 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2673 | } | |
2674 | spin_unlock(&pr_tmpl->registration_lock); | |
2675 | ||
2676 | write_aptpl: | |
459f213b AG |
2677 | if (pr_tmpl->pr_aptpl_active) |
2678 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
2679 | ||
de103c93 | 2680 | out_put_pr_reg: |
c66ac9db | 2681 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2682 | return ret; |
c66ac9db NB |
2683 | } |
2684 | ||
de103c93 CH |
2685 | static sense_reason_t |
2686 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) | |
c66ac9db NB |
2687 | { |
2688 | struct se_device *dev = cmd->se_dev; | |
2689 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 2690 | struct se_session *se_sess = cmd->se_sess; |
0fd97ccf | 2691 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2692 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
f2d30680 | 2693 | u64 pr_res_mapped_lun = 0; |
c66ac9db NB |
2694 | int calling_it_nexus = 0; |
2695 | /* | |
2696 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2697 | */ | |
5951146d | 2698 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2699 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2700 | if (!pr_reg_n) { |
2701 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2702 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
de103c93 | 2703 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2704 | } |
2705 | /* | |
2706 | * From spc4r17 section 5.7.11.6, Clearing: | |
2707 | * | |
2708 | * Any application client may release the persistent reservation and | |
2709 | * remove all registrations from a device server by issuing a | |
2710 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2711 | * registered I_T nexus with the following parameter: | |
2712 | * | |
2713 | * a) RESERVATION KEY field set to the value of the reservation key | |
2714 | * that is registered with the logical unit for the I_T nexus. | |
2715 | */ | |
2716 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2717 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2718 | " res_key: 0x%016Lx does not match" |
2719 | " existing SA REGISTER res_key:" | |
2720 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2721 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2722 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2723 | } |
2724 | /* | |
2725 | * a) Release the persistent reservation, if any; | |
2726 | */ | |
2727 | spin_lock(&dev->dev_reservation_lock); | |
2728 | pr_res_holder = dev->dev_pr_res_holder; | |
2729 | if (pr_res_holder) { | |
2730 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2731 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 2732 | pr_res_holder, 0, 0); |
c66ac9db NB |
2733 | } |
2734 | spin_unlock(&dev->dev_reservation_lock); | |
2735 | /* | |
2736 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2737 | */ | |
2738 | spin_lock(&pr_tmpl->registration_lock); | |
2739 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2740 | &pr_tmpl->registration_list, pr_reg_list) { | |
2741 | ||
2742 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2743 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2744 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2745 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2746 | calling_it_nexus); | |
2747 | /* | |
2748 | * e) Establish a unit attention condition for the initiator | |
2749 | * port associated with every registered I_T nexus other | |
2750 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2751 | * command with CLEAR service action was received, with the | |
2752 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2753 | */ | |
6708bb27 | 2754 | if (!calling_it_nexus) |
c51c8e7b | 2755 | target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, |
c66ac9db NB |
2756 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); |
2757 | } | |
2758 | spin_unlock(&pr_tmpl->registration_lock); | |
2759 | ||
6708bb27 | 2760 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2761 | cmd->se_tfo->get_fabric_name()); |
c66ac9db | 2762 | |
459f213b | 2763 | core_scsi3_update_and_write_aptpl(cmd->se_dev, false); |
c66ac9db NB |
2764 | |
2765 | core_scsi3_pr_generation(dev); | |
2766 | return 0; | |
2767 | } | |
2768 | ||
2769 | /* | |
2770 | * Called with struct se_device->dev_reservation_lock held. | |
2771 | */ | |
2772 | static void __core_scsi3_complete_pro_preempt( | |
2773 | struct se_device *dev, | |
2774 | struct t10_pr_registration *pr_reg, | |
2775 | struct list_head *preempt_and_abort_list, | |
2776 | int type, | |
2777 | int scope, | |
33ce6a87 | 2778 | enum preempt_type preempt_type) |
c66ac9db NB |
2779 | { |
2780 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
9ac8928e | 2781 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2782 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
2783 | |
2784 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2785 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2786 | /* |
125d0119 | 2787 | * Do an implicit RELEASE of the existing reservation. |
c66ac9db NB |
2788 | */ |
2789 | if (dev->dev_pr_res_holder) | |
2790 | __core_scsi3_complete_pro_release(dev, nacl, | |
6c3c9baa | 2791 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
2792 | |
2793 | dev->dev_pr_res_holder = pr_reg; | |
2794 | pr_reg->pr_res_holder = 1; | |
2795 | pr_reg->pr_res_type = type; | |
2796 | pr_reg->pr_res_scope = scope; | |
2797 | ||
6708bb27 | 2798 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db | 2799 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
33ce6a87 | 2800 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
c66ac9db NB |
2801 | core_scsi3_pr_dump_type(type), |
2802 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2803 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
33ce6a87 | 2804 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
d2843c17 | 2805 | nacl->initiatorname, i_buf); |
c66ac9db NB |
2806 | /* |
2807 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2808 | * struct t10_pr_registration to the list that will be compared | |
2809 | * against received CDBs.. | |
2810 | */ | |
2811 | if (preempt_and_abort_list) | |
2812 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2813 | preempt_and_abort_list); | |
2814 | } | |
2815 | ||
2816 | static void core_scsi3_release_preempt_and_abort( | |
2817 | struct list_head *preempt_and_abort_list, | |
2818 | struct t10_pr_registration *pr_reg_holder) | |
2819 | { | |
2820 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2821 | ||
2822 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2823 | pr_reg_abort_list) { | |
2824 | ||
2825 | list_del(&pr_reg->pr_reg_abort_list); | |
2826 | if (pr_reg_holder == pr_reg) | |
2827 | continue; | |
2828 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2829 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2830 | continue; |
2831 | } | |
2832 | ||
2833 | pr_reg->pr_reg_deve = NULL; | |
2834 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
2835 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
2836 | } | |
2837 | } | |
2838 | ||
de103c93 CH |
2839 | static sense_reason_t |
2840 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, | |
33ce6a87 | 2841 | u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 2842 | { |
5951146d | 2843 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2844 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2845 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2846 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2847 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
0fd97ccf | 2848 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
f2d30680 | 2849 | u64 pr_res_mapped_lun = 0; |
b6932ee3 SA |
2850 | int all_reg = 0, calling_it_nexus = 0; |
2851 | bool sa_res_key_unmatched = sa_res_key != 0; | |
de103c93 | 2852 | int prh_type = 0, prh_scope = 0; |
c66ac9db | 2853 | |
de103c93 CH |
2854 | if (!se_sess) |
2855 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2856 | |
5951146d | 2857 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2858 | se_sess); |
6708bb27 AG |
2859 | if (!pr_reg_n) { |
2860 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2861 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
33ce6a87 | 2862 | (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); |
de103c93 | 2863 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2864 | } |
2865 | if (pr_reg_n->pr_res_key != res_key) { | |
2866 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2867 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2868 | } |
2869 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2870 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2871 | core_scsi3_put_pr_reg(pr_reg_n); |
de103c93 | 2872 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 2873 | } |
c66ac9db NB |
2874 | |
2875 | spin_lock(&dev->dev_reservation_lock); | |
2876 | pr_res_holder = dev->dev_pr_res_holder; | |
2877 | if (pr_res_holder && | |
2878 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2879 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2880 | all_reg = 1; | |
2881 | ||
6708bb27 | 2882 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
2883 | spin_unlock(&dev->dev_reservation_lock); |
2884 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2885 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2886 | } |
2887 | /* | |
2888 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
2889 | * | |
2890 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
2891 | * persistent reservation holder or there is no persistent reservation | |
2892 | * holder (i.e., there is no persistent reservation), then the device | |
2893 | * server shall perform a preempt by doing the following in an | |
2894 | * uninterrupted series of actions. (See below..) | |
2895 | */ | |
6708bb27 | 2896 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
2897 | /* |
2898 | * No existing or SA Reservation Key matching reservations.. | |
2899 | * | |
2900 | * PROUT SA PREEMPT with All Registrant type reservations are | |
2901 | * allowed to be processed without a matching SA Reservation Key | |
2902 | */ | |
2903 | spin_lock(&pr_tmpl->registration_lock); | |
2904 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2905 | &pr_tmpl->registration_list, pr_reg_list) { | |
2906 | /* | |
2907 | * Removing of registrations in non all registrants | |
2908 | * type reservations without a matching SA reservation | |
2909 | * key. | |
2910 | * | |
2911 | * a) Remove the registrations for all I_T nexuses | |
2912 | * specified by the SERVICE ACTION RESERVATION KEY | |
2913 | * field; | |
2914 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
2915 | * c) Process tasks as defined in 5.7.1; and | |
2916 | * d) Establish a unit attention condition for the | |
2917 | * initiator port associated with every I_T nexus | |
2918 | * that lost its registration other than the I_T | |
2919 | * nexus on which the PERSISTENT RESERVE OUT command | |
2920 | * was received, with the additional sense code set | |
2921 | * to REGISTRATIONS PREEMPTED. | |
2922 | */ | |
6708bb27 | 2923 | if (!all_reg) { |
c66ac9db NB |
2924 | if (pr_reg->pr_res_key != sa_res_key) |
2925 | continue; | |
b6932ee3 | 2926 | sa_res_key_unmatched = false; |
c66ac9db NB |
2927 | |
2928 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2929 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2930 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2931 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2932 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2933 | NULL, calling_it_nexus); |
c66ac9db NB |
2934 | } else { |
2935 | /* | |
2936 | * Case for any existing all registrants type | |
2937 | * reservation, follow logic in spc4r17 section | |
2938 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
2939 | * | |
2940 | * For a ZERO SA Reservation key, release | |
125d0119 | 2941 | * all other registrations and do an implicit |
c66ac9db NB |
2942 | * release of active persistent reservation. |
2943 | * | |
2944 | * For a non-ZERO SA Reservation key, only | |
2945 | * release the matching reservation key from | |
2946 | * registrations. | |
2947 | */ | |
2948 | if ((sa_res_key) && | |
2949 | (pr_reg->pr_res_key != sa_res_key)) | |
2950 | continue; | |
b6932ee3 | 2951 | sa_res_key_unmatched = false; |
c66ac9db NB |
2952 | |
2953 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2954 | if (calling_it_nexus) | |
2955 | continue; | |
2956 | ||
2957 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2958 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2959 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2960 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2961 | NULL, 0); |
c66ac9db | 2962 | } |
6708bb27 | 2963 | if (!calling_it_nexus) |
c51c8e7b | 2964 | target_ua_allocate_lun(pr_reg_nacl, |
c66ac9db | 2965 | pr_res_mapped_lun, 0x2A, |
9e08e34e | 2966 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
2967 | } |
2968 | spin_unlock(&pr_tmpl->registration_lock); | |
2969 | /* | |
2970 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
2971 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
2972 | * RESERVATION KEY field to a value that does not match any | |
2973 | * registered reservation key, then the device server shall | |
2974 | * complete the command with RESERVATION CONFLICT status. | |
2975 | */ | |
b6932ee3 | 2976 | if (sa_res_key_unmatched) { |
c66ac9db NB |
2977 | spin_unlock(&dev->dev_reservation_lock); |
2978 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2979 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2980 | } |
2981 | /* | |
2982 | * For an existing all registrants type reservation | |
2983 | * with a zero SA rservation key, preempt the existing | |
2984 | * reservation with the new PR type and scope. | |
2985 | */ | |
2986 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
2987 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
2988 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
2989 | type, scope, preempt_type); | |
c66ac9db | 2990 | |
33ce6a87 | 2991 | if (preempt_type == PREEMPT_AND_ABORT) |
c66ac9db NB |
2992 | core_scsi3_release_preempt_and_abort( |
2993 | &preempt_and_abort_list, pr_reg_n); | |
2994 | } | |
2995 | spin_unlock(&dev->dev_reservation_lock); | |
2996 | ||
459f213b AG |
2997 | if (pr_tmpl->pr_aptpl_active) |
2998 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
2999 | |
3000 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3001 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3002 | return 0; |
3003 | } | |
3004 | /* | |
3005 | * The PREEMPTing SA reservation key matches that of the | |
3006 | * existing persistent reservation, first, we check if | |
3007 | * we are preempting our own reservation. | |
3008 | * From spc4r17, section 5.7.11.4.3 Preempting | |
3009 | * persistent reservations and registration handling | |
3010 | * | |
3011 | * If an all registrants persistent reservation is not | |
3012 | * present, it is not an error for the persistent | |
3013 | * reservation holder to preempt itself (i.e., a | |
3014 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
3015 | * or a PREEMPT AND ABORT service action with the | |
3016 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3017 | * persistent reservation holder's reservation key that | |
3018 | * is received from the persistent reservation holder). | |
3019 | * In that case, the device server shall establish the | |
3020 | * new persistent reservation and maintain the | |
3021 | * registration. | |
3022 | */ | |
3023 | prh_type = pr_res_holder->pr_res_type; | |
3024 | prh_scope = pr_res_holder->pr_res_scope; | |
3025 | /* | |
3026 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3027 | * persistent reservation holder (see 5.7.10), the device | |
3028 | * server shall perform a preempt by doing the following as | |
3029 | * an uninterrupted series of actions: | |
3030 | * | |
3031 | * a) Release the persistent reservation for the holder | |
3032 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3033 | */ | |
3034 | if (pr_reg_n != pr_res_holder) | |
3035 | __core_scsi3_complete_pro_release(dev, | |
6c3c9baa NB |
3036 | pr_res_holder->pr_reg_nacl, |
3037 | dev->dev_pr_res_holder, 0, 0); | |
c66ac9db NB |
3038 | /* |
3039 | * b) Remove the registrations for all I_T nexuses identified | |
3040 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3041 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3042 | * OUT command. If an all registrants persistent reservation | |
3043 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3044 | * is set to zero, then all registrations shall be removed | |
3045 | * except for that of the I_T nexus that is being used for | |
3046 | * the PERSISTENT RESERVE OUT command; | |
3047 | */ | |
3048 | spin_lock(&pr_tmpl->registration_lock); | |
3049 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3050 | &pr_tmpl->registration_list, pr_reg_list) { | |
3051 | ||
3052 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3053 | if (calling_it_nexus) | |
3054 | continue; | |
3055 | ||
3056 | if (pr_reg->pr_res_key != sa_res_key) | |
3057 | continue; | |
3058 | ||
3059 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3060 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3061 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 3062 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
c66ac9db NB |
3063 | calling_it_nexus); |
3064 | /* | |
3065 | * e) Establish a unit attention condition for the initiator | |
3066 | * port associated with every I_T nexus that lost its | |
3067 | * persistent reservation and/or registration, with the | |
3068 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3069 | */ | |
c51c8e7b | 3070 | target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A, |
9e08e34e | 3071 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3072 | } |
3073 | spin_unlock(&pr_tmpl->registration_lock); | |
3074 | /* | |
3075 | * c) Establish a persistent reservation for the preempting | |
3076 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3077 | */ | |
3078 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
3079 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
3080 | type, scope, preempt_type); | |
c66ac9db NB |
3081 | /* |
3082 | * d) Process tasks as defined in 5.7.1; | |
3083 | * e) See above.. | |
3084 | * f) If the type or scope has changed, then for every I_T nexus | |
3085 | * whose reservation key was not removed, except for the I_T | |
3086 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3087 | * received, the device server shall establish a unit | |
3088 | * attention condition for the initiator port associated with | |
3089 | * that I_T nexus, with the additional sense code set to | |
3090 | * RESERVATIONS RELEASED. If the type or scope have not | |
3091 | * changed, then no unit attention condition(s) shall be | |
3092 | * established for this reason. | |
3093 | */ | |
3094 | if ((prh_type != type) || (prh_scope != scope)) { | |
3095 | spin_lock(&pr_tmpl->registration_lock); | |
3096 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3097 | &pr_tmpl->registration_list, pr_reg_list) { | |
3098 | ||
3099 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3100 | if (calling_it_nexus) | |
3101 | continue; | |
3102 | ||
c51c8e7b | 3103 | target_ua_allocate_lun(pr_reg->pr_reg_nacl, |
c66ac9db NB |
3104 | pr_reg->pr_res_mapped_lun, 0x2A, |
3105 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3106 | } | |
3107 | spin_unlock(&pr_tmpl->registration_lock); | |
3108 | } | |
3109 | spin_unlock(&dev->dev_reservation_lock); | |
3110 | /* | |
3111 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3112 | * All received CDBs for the matching existing reservation and | |
3113 | * registrations undergo ABORT_TASK logic. | |
3114 | * | |
3115 | * From there, core_scsi3_release_preempt_and_abort() will | |
3116 | * release every registration in the list (which have already | |
3117 | * been removed from the primary pr_reg list), except the | |
3118 | * new persistent reservation holder, the calling Initiator Port. | |
3119 | */ | |
33ce6a87 | 3120 | if (preempt_type == PREEMPT_AND_ABORT) { |
c66ac9db NB |
3121 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); |
3122 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3123 | pr_reg_n); | |
3124 | } | |
3125 | ||
459f213b AG |
3126 | if (pr_tmpl->pr_aptpl_active) |
3127 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
3128 | |
3129 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3130 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3131 | return 0; |
3132 | } | |
3133 | ||
de103c93 CH |
3134 | static sense_reason_t |
3135 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, | |
33ce6a87 | 3136 | u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 3137 | { |
c66ac9db NB |
3138 | switch (type) { |
3139 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3140 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3141 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3142 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3143 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3144 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 3145 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
33ce6a87 | 3146 | sa_res_key, preempt_type); |
c66ac9db | 3147 | default: |
6708bb27 | 3148 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
33ce6a87 | 3149 | " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); |
de103c93 | 3150 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 3151 | } |
c66ac9db NB |
3152 | } |
3153 | ||
3154 | ||
de103c93 CH |
3155 | static sense_reason_t |
3156 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, | |
3157 | u64 sa_res_key, int aptpl, int unreg) | |
c66ac9db | 3158 | { |
e3d6f909 | 3159 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3160 | struct se_device *dev = cmd->se_dev; |
28168905 | 3161 | struct se_dev_entry *dest_se_deve = NULL; |
adf653f9 | 3162 | struct se_lun *se_lun = cmd->se_lun, *tmp_lun; |
c66ac9db | 3163 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
c66ac9db | 3164 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; |
9ac8928e | 3165 | const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; |
c66ac9db | 3166 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; |
0fd97ccf | 3167 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3168 | unsigned char *buf; |
2650d71e | 3169 | const unsigned char *initiator_str; |
13ba564c | 3170 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 3171 | u32 tid_len, tmp_tid_len; |
d2843c17 | 3172 | int new_reg = 0, type, scope, matching_iname; |
de103c93 | 3173 | sense_reason_t ret; |
c66ac9db NB |
3174 | unsigned short rtpi; |
3175 | unsigned char proto_ident; | |
3176 | ||
6708bb27 AG |
3177 | if (!se_sess || !se_lun) { |
3178 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 3179 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 3180 | } |
de103c93 | 3181 | |
c66ac9db NB |
3182 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
3183 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3184 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3185 | /* |
3186 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3187 | * Register behaviors for a REGISTER AND MOVE service action | |
3188 | * | |
3189 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3190 | */ | |
5951146d | 3191 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3192 | se_sess); |
6708bb27 AG |
3193 | if (!pr_reg) { |
3194 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3195 | " *pr_reg for REGISTER_AND_MOVE\n"); |
de103c93 | 3196 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3197 | } |
3198 | /* | |
3199 | * The provided reservation key much match the existing reservation key | |
3200 | * provided during this initiator's I_T nexus registration. | |
3201 | */ | |
3202 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3203 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3204 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3205 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
3206 | ret = TCM_RESERVATION_CONFLICT; |
3207 | goto out_put_pr_reg; | |
c66ac9db NB |
3208 | } |
3209 | /* | |
3210 | * The service active reservation key needs to be non zero | |
3211 | */ | |
6708bb27 AG |
3212 | if (!sa_res_key) { |
3213 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db | 3214 | " sa_res_key\n"); |
de103c93 CH |
3215 | ret = TCM_INVALID_PARAMETER_LIST; |
3216 | goto out_put_pr_reg; | |
c66ac9db | 3217 | } |
05d1c7c0 | 3218 | |
c66ac9db NB |
3219 | /* |
3220 | * Determine the Relative Target Port Identifier where the reservation | |
3221 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3222 | * information. | |
3223 | */ | |
4949314c | 3224 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3225 | if (!buf) { |
3226 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3227 | goto out_put_pr_reg; | |
3228 | } | |
3229 | ||
c66ac9db NB |
3230 | rtpi = (buf[18] & 0xff) << 8; |
3231 | rtpi |= buf[19] & 0xff; | |
3232 | tid_len = (buf[20] & 0xff) << 24; | |
3233 | tid_len |= (buf[21] & 0xff) << 16; | |
3234 | tid_len |= (buf[22] & 0xff) << 8; | |
3235 | tid_len |= buf[23] & 0xff; | |
4949314c | 3236 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3237 | buf = NULL; |
c66ac9db NB |
3238 | |
3239 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3240 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3241 | " does not equal CDB data_length: %u\n", tid_len, |
3242 | cmd->data_length); | |
de103c93 CH |
3243 | ret = TCM_INVALID_PARAMETER_LIST; |
3244 | goto out_put_pr_reg; | |
c66ac9db NB |
3245 | } |
3246 | ||
3247 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
3248 | list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { |
3249 | if (tmp_lun->lun_rtpi != rtpi) | |
c66ac9db | 3250 | continue; |
adf653f9 | 3251 | dest_se_tpg = tmp_lun->lun_tpg; |
e3d6f909 | 3252 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3253 | if (!dest_tf_ops) |
c66ac9db NB |
3254 | continue; |
3255 | ||
33940d09 | 3256 | atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); |
c66ac9db NB |
3257 | spin_unlock(&dev->se_port_lock); |
3258 | ||
de103c93 | 3259 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
6708bb27 | 3260 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db | 3261 | " for dest_se_tpg\n"); |
33940d09 | 3262 | atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); |
de103c93 CH |
3263 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3264 | goto out_put_pr_reg; | |
c66ac9db NB |
3265 | } |
3266 | ||
3267 | spin_lock(&dev->se_port_lock); | |
3268 | break; | |
3269 | } | |
3270 | spin_unlock(&dev->se_port_lock); | |
3271 | ||
6708bb27 AG |
3272 | if (!dest_se_tpg || !dest_tf_ops) { |
3273 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3274 | " fabric ops from Relative Target Port Identifier:" |
3275 | " %hu\n", rtpi); | |
de103c93 CH |
3276 | ret = TCM_INVALID_PARAMETER_LIST; |
3277 | goto out_put_pr_reg; | |
c66ac9db | 3278 | } |
05d1c7c0 | 3279 | |
4949314c | 3280 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3281 | if (!buf) { |
3282 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3283 | goto out_put_pr_reg; | |
3284 | } | |
c66ac9db | 3285 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3286 | |
6708bb27 | 3287 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3288 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3289 | |
2aeeafae | 3290 | if (proto_ident != dest_se_tpg->proto_id) { |
6708bb27 | 3291 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3292 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3293 | " from fabric: %s\n", proto_ident, | |
2aeeafae | 3294 | dest_se_tpg->proto_id, |
c66ac9db | 3295 | dest_tf_ops->get_fabric_name()); |
de103c93 | 3296 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3297 | goto out; |
3298 | } | |
2650d71e | 3299 | initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, |
c66ac9db | 3300 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); |
6708bb27 AG |
3301 | if (!initiator_str) { |
3302 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3303 | " initiator_str from Transport ID\n"); |
de103c93 | 3304 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3305 | goto out; |
3306 | } | |
3307 | ||
4949314c | 3308 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3309 | buf = NULL; |
3310 | ||
6708bb27 | 3311 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3312 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3313 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3314 | iport_ptr : ""); | |
3315 | /* | |
3316 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3317 | * action specifies a TransportID that is the same as the initiator port | |
3318 | * of the I_T nexus for the command received, then the command shall | |
3319 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3320 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3321 | * IN PARAMETER LIST. | |
3322 | */ | |
3323 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3324 | matching_iname = (!strcmp(initiator_str, | |
3325 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3326 | if (!matching_iname) |
c66ac9db NB |
3327 | goto after_iport_check; |
3328 | ||
6708bb27 AG |
3329 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3330 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3331 | " matches: %s on received I_T Nexus\n", initiator_str, |
3332 | pr_reg_nacl->initiatorname); | |
de103c93 | 3333 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3334 | goto out; |
3335 | } | |
6708bb27 AG |
3336 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3337 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3338 | " matches: %s %s on received I_T Nexus\n", |
3339 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3340 | pr_reg->pr_reg_isid); | |
de103c93 | 3341 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3342 | goto out; |
3343 | } | |
3344 | after_iport_check: | |
3345 | /* | |
3346 | * Locate the destination struct se_node_acl from the received Transport ID | |
3347 | */ | |
403edd78 | 3348 | mutex_lock(&dest_se_tpg->acl_node_mutex); |
c66ac9db NB |
3349 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3350 | initiator_str); | |
33940d09 JE |
3351 | if (dest_node_acl) |
3352 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 3353 | mutex_unlock(&dest_se_tpg->acl_node_mutex); |
c66ac9db | 3354 | |
6708bb27 AG |
3355 | if (!dest_node_acl) { |
3356 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3357 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3358 | initiator_str); | |
de103c93 | 3359 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3360 | goto out; |
3361 | } | |
de103c93 CH |
3362 | |
3363 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { | |
6708bb27 | 3364 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db | 3365 | " dest_node_acl\n"); |
33940d09 | 3366 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 3367 | dest_node_acl = NULL; |
de103c93 | 3368 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3369 | goto out; |
3370 | } | |
8b1e1244 | 3371 | |
6708bb27 | 3372 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3373 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3374 | dest_node_acl->initiatorname); | |
8b1e1244 | 3375 | |
c66ac9db NB |
3376 | /* |
3377 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3378 | * PORT IDENTIFIER. | |
3379 | */ | |
3380 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3381 | if (!dest_se_deve) { |
3382 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3383 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
de103c93 | 3384 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3385 | goto out; |
3386 | } | |
3387 | ||
de103c93 | 3388 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 3389 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
29a05dee | 3390 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db | 3391 | dest_se_deve = NULL; |
de103c93 | 3392 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3393 | goto out; |
3394 | } | |
8b1e1244 | 3395 | |
6708bb27 | 3396 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
f2d30680 | 3397 | " ACL for dest_se_deve->mapped_lun: %llu\n", |
c66ac9db NB |
3398 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, |
3399 | dest_se_deve->mapped_lun); | |
8b1e1244 | 3400 | |
c66ac9db NB |
3401 | /* |
3402 | * A persistent reservation needs to already existing in order to | |
3403 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3404 | */ | |
3405 | spin_lock(&dev->dev_reservation_lock); | |
3406 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3407 | if (!pr_res_holder) { |
3408 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3409 | " currently held\n"); |
3410 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3411 | ret = TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3412 | goto out; |
3413 | } | |
3414 | /* | |
3415 | * The received on I_T Nexus must be the reservation holder. | |
3416 | * | |
3417 | * From spc4r17 section 5.7.8 Table 50 -- | |
3418 | * Register behaviors for a REGISTER AND MOVE service action | |
3419 | */ | |
e673dc92 | 3420 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
6708bb27 | 3421 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3422 | " Nexus is not reservation holder\n"); |
3423 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3424 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3425 | goto out; |
3426 | } | |
3427 | /* | |
3428 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3429 | * | |
3430 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3431 | * action is received and the established persistent reservation is a | |
3432 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3433 | * All Registrants type reservation, then the command shall be completed | |
3434 | * with RESERVATION CONFLICT status. | |
3435 | */ | |
3436 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3437 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3438 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3439 | " reservation for type: %s\n", |
3440 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3441 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3442 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3443 | goto out; |
3444 | } | |
3445 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3446 | /* | |
3447 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3448 | */ | |
3449 | type = pr_res_holder->pr_res_type; | |
3450 | scope = pr_res_holder->pr_res_type; | |
3451 | /* | |
3452 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3453 | * RESERVATION KEY field with the I_T nexus specified as the | |
3454 | * destination of the register and move, where: | |
3455 | * A) The I_T nexus is specified by the TransportID and the | |
3456 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3457 | * B) Regardless of the TransportID format used, the association for | |
3458 | * the initiator port is based on either the initiator port name | |
3459 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3460 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3461 | * transport protocols where port names are not required; | |
3462 | * d) Register the reservation key specified in the SERVICE ACTION | |
3463 | * RESERVATION KEY field; | |
3464 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3465 | * RESERVATION KEY field and associated information; | |
3466 | * | |
3467 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3468 | * register an I_T nexus that is already registered with the same | |
3469 | * reservation key or a different reservation key. | |
3470 | */ | |
3471 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3472 | iport_ptr); | |
6708bb27 | 3473 | if (!dest_pr_reg) { |
79dc9c9e NB |
3474 | struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
3475 | atomic_read(&dest_se_deve->pr_kref.refcount) != 0); | |
3476 | ||
80bfdfa9 | 3477 | spin_unlock(&dev->dev_reservation_lock); |
79dc9c9e NB |
3478 | if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, |
3479 | dest_lun, dest_se_deve, dest_se_deve->mapped_lun, | |
3480 | iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { | |
de103c93 | 3481 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3482 | goto out; |
3483 | } | |
80bfdfa9 | 3484 | spin_lock(&dev->dev_reservation_lock); |
c66ac9db NB |
3485 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
3486 | iport_ptr); | |
3487 | new_reg = 1; | |
3488 | } | |
3489 | /* | |
3490 | * f) Release the persistent reservation for the persistent reservation | |
3491 | * holder (i.e., the I_T nexus on which the | |
3492 | */ | |
3493 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 3494 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
3495 | /* |
3496 | * g) Move the persistent reservation to the specified I_T nexus using | |
3497 | * the same scope and type as the persistent reservation released in | |
3498 | * item f); and | |
3499 | */ | |
3500 | dev->dev_pr_res_holder = dest_pr_reg; | |
3501 | dest_pr_reg->pr_res_holder = 1; | |
3502 | dest_pr_reg->pr_res_type = type; | |
3503 | pr_reg->pr_res_scope = scope; | |
d2843c17 | 3504 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
3505 | /* |
3506 | * Increment PRGeneration for existing registrations.. | |
3507 | */ | |
6708bb27 | 3508 | if (!new_reg) |
c66ac9db NB |
3509 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3510 | spin_unlock(&dev->dev_reservation_lock); | |
3511 | ||
6708bb27 | 3512 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3513 | " created new reservation holder TYPE: %s on object RTPI:" |
3514 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3515 | core_scsi3_pr_dump_type(type), rtpi, | |
3516 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3517 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3518 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3519 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
d2843c17 | 3520 | i_buf, dest_tf_ops->get_fabric_name(), |
c66ac9db NB |
3521 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? |
3522 | iport_ptr : ""); | |
3523 | /* | |
3524 | * It is now safe to release configfs group dependencies for destination | |
3525 | * of Transport ID Initiator Device/Port Identifier | |
3526 | */ | |
3527 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3528 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3529 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3530 | /* | |
3531 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3532 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3533 | */ | |
3534 | if (unreg) { | |
3535 | spin_lock(&pr_tmpl->registration_lock); | |
3536 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3537 | spin_unlock(&pr_tmpl->registration_lock); | |
3538 | } else | |
3539 | core_scsi3_put_pr_reg(pr_reg); | |
3540 | ||
459f213b | 3541 | core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); |
c66ac9db | 3542 | |
4949314c | 3543 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3544 | |
c66ac9db NB |
3545 | core_scsi3_put_pr_reg(dest_pr_reg); |
3546 | return 0; | |
3547 | out: | |
05d1c7c0 | 3548 | if (buf) |
4949314c | 3549 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3550 | if (dest_se_deve) |
3551 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3552 | if (dest_node_acl) | |
3553 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3554 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
de103c93 CH |
3555 | |
3556 | out_put_pr_reg: | |
c66ac9db NB |
3557 | core_scsi3_put_pr_reg(pr_reg); |
3558 | return ret; | |
3559 | } | |
3560 | ||
3561 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3562 | { | |
3563 | unsigned int __v1, __v2; | |
3564 | ||
3565 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3566 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3567 | ||
3568 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3569 | } | |
3570 | ||
3571 | /* | |
3572 | * See spc4r17 section 6.14 Table 170 | |
3573 | */ | |
de103c93 CH |
3574 | sense_reason_t |
3575 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) | |
c66ac9db | 3576 | { |
92404e60 | 3577 | struct se_device *dev = cmd->se_dev; |
617c0e06 | 3578 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3579 | unsigned char *buf; |
c66ac9db NB |
3580 | u64 res_key, sa_res_key; |
3581 | int sa, scope, type, aptpl; | |
3582 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
de103c93 | 3583 | sense_reason_t ret; |
617c0e06 CH |
3584 | |
3585 | /* | |
3586 | * Following spc2r20 5.5.1 Reservations overview: | |
3587 | * | |
3588 | * If a logical unit has been reserved by any RESERVE command and is | |
3589 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3590 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3591 | * initiator or service action and shall terminate with a RESERVATION | |
3592 | * CONFLICT status. | |
3593 | */ | |
0fd97ccf | 3594 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
617c0e06 CH |
3595 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
3596 | " SPC-2 reservation is held, returning" | |
3597 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 3598 | return TCM_RESERVATION_CONFLICT; |
617c0e06 CH |
3599 | } |
3600 | ||
c66ac9db NB |
3601 | /* |
3602 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3603 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3604 | */ | |
de103c93 CH |
3605 | if (!cmd->se_sess) |
3606 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db NB |
3607 | |
3608 | if (cmd->data_length < 24) { | |
6708bb27 | 3609 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3610 | " length too small: %u\n", cmd->data_length); |
de103c93 | 3611 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3612 | } |
de103c93 | 3613 | |
c66ac9db NB |
3614 | /* |
3615 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3616 | */ | |
3617 | sa = (cdb[1] & 0x1f); | |
3618 | scope = (cdb[2] & 0xf0); | |
3619 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3620 | |
4949314c | 3621 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3622 | if (!buf) |
3623 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3624 | ||
c66ac9db NB |
3625 | /* |
3626 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3627 | */ | |
3628 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3629 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3630 | /* | |
3631 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3632 | * SCSI TransportIDs. | |
3633 | */ | |
3634 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3635 | spec_i_pt = (buf[20] & 0x08); | |
3636 | all_tg_pt = (buf[20] & 0x04); | |
3637 | aptpl = (buf[20] & 0x01); | |
3638 | } else { | |
3639 | aptpl = (buf[17] & 0x01); | |
3640 | unreg = (buf[17] & 0x02); | |
3641 | } | |
92404e60 NB |
3642 | /* |
3643 | * If the backend device has been configured to force APTPL metadata | |
3644 | * write-out, go ahead and propigate aptpl=1 down now. | |
3645 | */ | |
3646 | if (dev->dev_attrib.force_pr_aptpl) | |
3647 | aptpl = 1; | |
3648 | ||
4949314c | 3649 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3650 | buf = NULL; |
3651 | ||
c66ac9db NB |
3652 | /* |
3653 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3654 | */ | |
de103c93 CH |
3655 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) |
3656 | return TCM_INVALID_PARAMETER_LIST; | |
d29a5b6a | 3657 | |
c66ac9db NB |
3658 | /* |
3659 | * From spc4r17 section 6.14: | |
3660 | * | |
3661 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3662 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3663 | * the command shall be terminated with CHECK CONDITION status, with | |
3664 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3665 | * code set to PARAMETER LIST LENGTH ERROR. | |
3666 | */ | |
6708bb27 | 3667 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3668 | (cmd->data_length != 24)) { |
6708bb27 | 3669 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3670 | " list length: %u\n", cmd->data_length); |
de103c93 | 3671 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3672 | } |
de103c93 | 3673 | |
c66ac9db NB |
3674 | /* |
3675 | * (core_scsi3_emulate_pro_* function parameters | |
3676 | * are defined by spc4r17 Table 174: | |
3677 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3678 | */ | |
3679 | switch (sa) { | |
3680 | case PRO_REGISTER: | |
d29a5b6a | 3681 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3682 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); |
d29a5b6a | 3683 | break; |
c66ac9db | 3684 | case PRO_RESERVE: |
d29a5b6a CH |
3685 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3686 | break; | |
c66ac9db | 3687 | case PRO_RELEASE: |
d29a5b6a CH |
3688 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3689 | break; | |
c66ac9db | 3690 | case PRO_CLEAR: |
d29a5b6a CH |
3691 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3692 | break; | |
c66ac9db | 3693 | case PRO_PREEMPT: |
d29a5b6a | 3694 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3695 | res_key, sa_res_key, PREEMPT); |
d29a5b6a | 3696 | break; |
c66ac9db | 3697 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3698 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3699 | res_key, sa_res_key, PREEMPT_AND_ABORT); |
d29a5b6a | 3700 | break; |
c66ac9db | 3701 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3702 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3703 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); |
d29a5b6a | 3704 | break; |
c66ac9db | 3705 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3706 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3707 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3708 | break; |
c66ac9db | 3709 | default: |
6708bb27 | 3710 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3711 | " action: 0x%02x\n", cdb[1] & 0x1f); |
de103c93 | 3712 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3713 | } |
3714 | ||
6bb35e00 CH |
3715 | if (!ret) |
3716 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3717 | return ret; |
c66ac9db NB |
3718 | } |
3719 | ||
3720 | /* | |
3721 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3722 | * | |
3723 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3724 | */ | |
de103c93 CH |
3725 | static sense_reason_t |
3726 | core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
c66ac9db | 3727 | { |
0fd97ccf | 3728 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3729 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3730 | unsigned char *buf; |
c66ac9db NB |
3731 | u32 add_len = 0, off = 8; |
3732 | ||
3733 | if (cmd->data_length < 8) { | |
6708bb27 | 3734 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3735 | " too small\n", cmd->data_length); |
de103c93 | 3736 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3737 | } |
3738 | ||
4949314c | 3739 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3740 | if (!buf) |
3741 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3742 | ||
0fd97ccf CH |
3743 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3744 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3745 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3746 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3747 | |
0fd97ccf CH |
3748 | spin_lock(&dev->t10_pr.registration_lock); |
3749 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
3750 | pr_reg_list) { |
3751 | /* | |
3752 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3753 | * next reservation key list descriptor. | |
3754 | */ | |
3755 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3756 | break; | |
3757 | ||
3758 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3759 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3760 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3761 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3762 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3763 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3764 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3765 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3766 | ||
3767 | add_len += 8; | |
3768 | } | |
0fd97ccf | 3769 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db NB |
3770 | |
3771 | buf[4] = ((add_len >> 24) & 0xff); | |
3772 | buf[5] = ((add_len >> 16) & 0xff); | |
3773 | buf[6] = ((add_len >> 8) & 0xff); | |
3774 | buf[7] = (add_len & 0xff); | |
3775 | ||
4949314c | 3776 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3777 | |
c66ac9db NB |
3778 | return 0; |
3779 | } | |
3780 | ||
3781 | /* | |
3782 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3783 | * | |
3784 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3785 | */ | |
de103c93 CH |
3786 | static sense_reason_t |
3787 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
c66ac9db | 3788 | { |
0fd97ccf | 3789 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3790 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3791 | unsigned char *buf; |
c66ac9db NB |
3792 | u64 pr_res_key; |
3793 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
3794 | ||
3795 | if (cmd->data_length < 8) { | |
6708bb27 | 3796 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 3797 | " too small\n", cmd->data_length); |
de103c93 | 3798 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3799 | } |
3800 | ||
4949314c | 3801 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3802 | if (!buf) |
3803 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3804 | ||
0fd97ccf CH |
3805 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3806 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3807 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3808 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3809 | |
0fd97ccf CH |
3810 | spin_lock(&dev->dev_reservation_lock); |
3811 | pr_reg = dev->dev_pr_res_holder; | |
ee1b1b9c | 3812 | if (pr_reg) { |
c66ac9db NB |
3813 | /* |
3814 | * Set the hardcoded Additional Length | |
3815 | */ | |
3816 | buf[4] = ((add_len >> 24) & 0xff); | |
3817 | buf[5] = ((add_len >> 16) & 0xff); | |
3818 | buf[6] = ((add_len >> 8) & 0xff); | |
3819 | buf[7] = (add_len & 0xff); | |
3820 | ||
05d1c7c0 AG |
3821 | if (cmd->data_length < 22) |
3822 | goto err; | |
3823 | ||
c66ac9db NB |
3824 | /* |
3825 | * Set the Reservation key. | |
3826 | * | |
3827 | * From spc4r17, section 5.7.10: | |
3828 | * A persistent reservation holder has its reservation key | |
3829 | * returned in the parameter data from a PERSISTENT | |
3830 | * RESERVE IN command with READ RESERVATION service action as | |
3831 | * follows: | |
3832 | * a) For a persistent reservation of the type Write Exclusive | |
3833 | * - All Registrants or Exclusive Access  All Regitrants, | |
3834 | * the reservation key shall be set to zero; or | |
3835 | * b) For all other persistent reservation types, the | |
3836 | * reservation key shall be set to the registered | |
3837 | * reservation key for the I_T nexus that holds the | |
3838 | * persistent reservation. | |
3839 | */ | |
3840 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3841 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3842 | pr_res_key = 0; | |
3843 | else | |
3844 | pr_res_key = pr_reg->pr_res_key; | |
3845 | ||
3846 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
3847 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
3848 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
3849 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
3850 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
3851 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
3852 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
3853 | buf[15] = (pr_res_key & 0xff); | |
3854 | /* | |
3855 | * Set the SCOPE and TYPE | |
3856 | */ | |
3857 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3858 | (pr_reg->pr_res_type & 0x0f); | |
3859 | } | |
05d1c7c0 AG |
3860 | |
3861 | err: | |
0fd97ccf | 3862 | spin_unlock(&dev->dev_reservation_lock); |
4949314c | 3863 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3864 | |
3865 | return 0; | |
3866 | } | |
3867 | ||
3868 | /* | |
3869 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3870 | * | |
3871 | * See spc4r17 section 6.13.4 Table 165 | |
3872 | */ | |
de103c93 CH |
3873 | static sense_reason_t |
3874 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
c66ac9db | 3875 | { |
5951146d | 3876 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 3877 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3878 | unsigned char *buf; |
c66ac9db NB |
3879 | u16 add_len = 8; /* Hardcoded to 8. */ |
3880 | ||
3881 | if (cmd->data_length < 6) { | |
6708bb27 | 3882 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 3883 | " %u too small\n", cmd->data_length); |
de103c93 | 3884 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3885 | } |
3886 | ||
4949314c | 3887 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3888 | if (!buf) |
3889 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3890 | |
c435285d | 3891 | buf[0] = ((add_len >> 8) & 0xff); |
c66ac9db NB |
3892 | buf[1] = (add_len & 0xff); |
3893 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
3894 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3895 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3896 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3897 | /* | |
3898 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3899 | * set the TMV: Task Mask Valid bit. | |
3900 | */ | |
3901 | buf[3] |= 0x80; | |
3902 | /* | |
3903 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3904 | */ | |
3905 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3906 | /* | |
3907 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3908 | */ | |
3909 | if (pr_tmpl->pr_aptpl_active) | |
3910 | buf[3] |= 0x01; | |
3911 | /* | |
3912 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3913 | */ | |
3914 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3915 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
3916 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
3917 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
3918 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
3919 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3920 | ||
4949314c | 3921 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3922 | |
c66ac9db NB |
3923 | return 0; |
3924 | } | |
3925 | ||
3926 | /* | |
3927 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
3928 | * | |
3929 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
3930 | */ | |
de103c93 CH |
3931 | static sense_reason_t |
3932 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
c66ac9db | 3933 | { |
0fd97ccf | 3934 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3935 | struct se_node_acl *se_nacl; |
c66ac9db NB |
3936 | struct se_portal_group *se_tpg; |
3937 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 3938 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3939 | unsigned char *buf; |
2650d71e | 3940 | u32 add_desc_len = 0, add_len = 0; |
c66ac9db | 3941 | u32 off = 8; /* off into first Full Status descriptor */ |
d16ca7c5 | 3942 | int format_code = 0, pr_res_type = 0, pr_res_scope = 0; |
2650d71e | 3943 | int exp_desc_len, desc_len; |
d16ca7c5 | 3944 | bool all_reg = false; |
c66ac9db NB |
3945 | |
3946 | if (cmd->data_length < 8) { | |
6708bb27 | 3947 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 3948 | " too small\n", cmd->data_length); |
de103c93 | 3949 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3950 | } |
3951 | ||
4949314c | 3952 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3953 | if (!buf) |
3954 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3955 | |
0fd97ccf CH |
3956 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3957 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3958 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3959 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3960 | |
d16ca7c5 NB |
3961 | spin_lock(&dev->dev_reservation_lock); |
3962 | if (dev->dev_pr_res_holder) { | |
3963 | struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; | |
3964 | ||
3965 | if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
3966 | pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { | |
3967 | all_reg = true; | |
3968 | pr_res_type = pr_holder->pr_res_type; | |
3969 | pr_res_scope = pr_holder->pr_res_scope; | |
3970 | } | |
3971 | } | |
3972 | spin_unlock(&dev->dev_reservation_lock); | |
3973 | ||
c66ac9db NB |
3974 | spin_lock(&pr_tmpl->registration_lock); |
3975 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3976 | &pr_tmpl->registration_list, pr_reg_list) { | |
3977 | ||
3978 | se_nacl = pr_reg->pr_reg_nacl; | |
3979 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
3980 | add_desc_len = 0; | |
3981 | ||
33940d09 | 3982 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3983 | spin_unlock(&pr_tmpl->registration_lock); |
3984 | /* | |
3985 | * Determine expected length of $FABRIC_MOD specific | |
3986 | * TransportID full status descriptor.. | |
3987 | */ | |
2650d71e CH |
3988 | exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, |
3989 | &format_code); | |
3990 | if (exp_desc_len < 0 || | |
3991 | exp_desc_len + add_len > cmd->data_length) { | |
6708bb27 | 3992 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
3993 | " out of buffer: %d\n", cmd->data_length); |
3994 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 3995 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3996 | break; |
3997 | } | |
3998 | /* | |
3999 | * Set RESERVATION KEY | |
4000 | */ | |
4001 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
4002 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
4003 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
4004 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
4005 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
4006 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
4007 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
4008 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
4009 | off += 4; /* Skip Over Reserved area */ | |
4010 | ||
4011 | /* | |
4012 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
4013 | */ | |
4014 | if (pr_reg->pr_reg_all_tg_pt) | |
4015 | buf[off] = 0x02; | |
4016 | /* | |
4017 | * The struct se_lun pointer will be present for the | |
4018 | * reservation holder for PR_HOLDER bit. | |
4019 | * | |
4020 | * Also, if this registration is the reservation | |
d16ca7c5 NB |
4021 | * holder or there is an All Registrants reservation |
4022 | * active, fill in SCOPE and TYPE in the next byte. | |
c66ac9db NB |
4023 | */ |
4024 | if (pr_reg->pr_res_holder) { | |
4025 | buf[off++] |= 0x01; | |
4026 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
4027 | (pr_reg->pr_res_type & 0x0f); | |
d16ca7c5 NB |
4028 | } else if (all_reg) { |
4029 | buf[off++] |= 0x01; | |
4030 | buf[off++] = (pr_res_scope & 0xf0) | | |
4031 | (pr_res_type & 0x0f); | |
4032 | } else { | |
c66ac9db | 4033 | off += 2; |
d16ca7c5 | 4034 | } |
c66ac9db NB |
4035 | |
4036 | off += 4; /* Skip over reserved area */ | |
4037 | /* | |
4038 | * From spc4r17 6.3.15: | |
4039 | * | |
4040 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
4041 | * IDENTIFIER field contains the relative port identifier (see | |
4042 | * 3.1.120) of the target port that is part of the I_T nexus | |
4043 | * described by this full status descriptor. If the ALL_TG_PT | |
4044 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
4045 | * IDENTIFIER field are not defined by this standard. | |
4046 | */ | |
6708bb27 | 4047 | if (!pr_reg->pr_reg_all_tg_pt) { |
79dc9c9e | 4048 | u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; |
c66ac9db | 4049 | |
79dc9c9e NB |
4050 | buf[off++] = ((sep_rtpi >> 8) & 0xff); |
4051 | buf[off++] = (sep_rtpi & 0xff); | |
c66ac9db | 4052 | } else |
35d1efe8 | 4053 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
c66ac9db | 4054 | |
2650d71e CH |
4055 | buf[off+4] = se_tpg->proto_id; |
4056 | ||
c66ac9db | 4057 | /* |
2650d71e | 4058 | * Now, have the $FABRIC_MOD fill in the transport ID. |
c66ac9db | 4059 | */ |
2650d71e CH |
4060 | desc_len = target_get_pr_transport_id(se_nacl, pr_reg, |
4061 | &format_code, &buf[off+4]); | |
c66ac9db NB |
4062 | |
4063 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 4064 | atomic_dec_mb(&pr_reg->pr_res_holders); |
2650d71e CH |
4065 | |
4066 | if (desc_len < 0) | |
4067 | break; | |
c66ac9db NB |
4068 | /* |
4069 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4070 | */ | |
4071 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4072 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4073 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4074 | buf[off++] = (desc_len & 0xff); | |
4075 | /* | |
4076 | * Size of full desctipor header minus TransportID | |
4077 | * containing $FABRIC_MOD specific) initiator device/port | |
4078 | * WWN information. | |
4079 | * | |
4080 | * See spc4r17 Section 6.13.5 Table 169 | |
4081 | */ | |
4082 | add_desc_len = (24 + desc_len); | |
4083 | ||
4084 | off += desc_len; | |
4085 | add_len += add_desc_len; | |
4086 | } | |
4087 | spin_unlock(&pr_tmpl->registration_lock); | |
4088 | /* | |
4089 | * Set ADDITIONAL_LENGTH | |
4090 | */ | |
4091 | buf[4] = ((add_len >> 24) & 0xff); | |
4092 | buf[5] = ((add_len >> 16) & 0xff); | |
4093 | buf[6] = ((add_len >> 8) & 0xff); | |
4094 | buf[7] = (add_len & 0xff); | |
4095 | ||
4949314c | 4096 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4097 | |
c66ac9db NB |
4098 | return 0; |
4099 | } | |
4100 | ||
de103c93 CH |
4101 | sense_reason_t |
4102 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) | |
c66ac9db | 4103 | { |
de103c93 | 4104 | sense_reason_t ret; |
e76a35d6 | 4105 | |
c66ac9db NB |
4106 | /* |
4107 | * Following spc2r20 5.5.1 Reservations overview: | |
4108 | * | |
4109 | * If a logical unit has been reserved by any RESERVE command and is | |
4110 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4111 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4112 | * initiator or service action and shall terminate with a RESERVATION | |
4113 | * CONFLICT status. | |
4114 | */ | |
0fd97ccf | 4115 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
6708bb27 | 4116 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4117 | " SPC-2 reservation is held, returning" |
4118 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 4119 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
4120 | } |
4121 | ||
617c0e06 CH |
4122 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4123 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4124 | ret = core_scsi3_pri_read_keys(cmd); |
4125 | break; | |
617c0e06 | 4126 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4127 | ret = core_scsi3_pri_read_reservation(cmd); |
4128 | break; | |
617c0e06 | 4129 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4130 | ret = core_scsi3_pri_report_capabilities(cmd); |
4131 | break; | |
617c0e06 | 4132 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4133 | ret = core_scsi3_pri_read_full_status(cmd); |
4134 | break; | |
617c0e06 CH |
4135 | default: |
4136 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4137 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
de103c93 | 4138 | return TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
4139 | } |
4140 | ||
6bb35e00 CH |
4141 | if (!ret) |
4142 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4143 | return ret; |
c66ac9db NB |
4144 | } |
4145 | ||
de103c93 CH |
4146 | sense_reason_t |
4147 | target_check_reservation(struct se_cmd *cmd) | |
c66ac9db | 4148 | { |
d977f437 | 4149 | struct se_device *dev = cmd->se_dev; |
de103c93 | 4150 | sense_reason_t ret; |
c66ac9db | 4151 | |
d977f437 CH |
4152 | if (!cmd->se_sess) |
4153 | return 0; | |
4154 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
4155 | return 0; | |
a3541703 | 4156 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
d977f437 | 4157 | return 0; |
c66ac9db | 4158 | |
d977f437 CH |
4159 | spin_lock(&dev->dev_reservation_lock); |
4160 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) | |
4161 | ret = target_scsi2_reservation_check(cmd); | |
4162 | else | |
4163 | ret = target_scsi3_pr_reservation_check(cmd); | |
4164 | spin_unlock(&dev->dev_reservation_lock); | |
0fd97ccf | 4165 | |
d977f437 | 4166 | return ret; |
c66ac9db | 4167 | } |