Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_pr.c | |
3 | * | |
4 | * This file contains SPC-3 compliant persistent reservations and | |
5 | * legacy SPC-2 reservations with compatible reservation handling (CRH=1) | |
6 | * | |
4c76251e | 7 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
8 | * |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
c66ac9db NB |
27 | #include <linux/slab.h> |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/list.h> | |
0e9b10a9 | 30 | #include <linux/file.h> |
c66ac9db NB |
31 | #include <scsi/scsi.h> |
32 | #include <scsi/scsi_cmnd.h> | |
33 | #include <asm/unaligned.h> | |
34 | ||
35 | #include <target/target_core_base.h> | |
c4795fb2 CH |
36 | #include <target/target_core_backend.h> |
37 | #include <target/target_core_fabric.h> | |
c66ac9db | 38 | |
e26d99ae | 39 | #include "target_core_internal.h" |
c66ac9db NB |
40 | #include "target_core_pr.h" |
41 | #include "target_core_ua.h" | |
42 | ||
43 | /* | |
44 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) | |
45 | */ | |
46 | struct pr_transport_id_holder { | |
47 | int dest_local_nexus; | |
48 | struct t10_pr_registration *dest_pr_reg; | |
49 | struct se_portal_group *dest_tpg; | |
50 | struct se_node_acl *dest_node_acl; | |
51 | struct se_dev_entry *dest_se_deve; | |
52 | struct list_head dest_list; | |
53 | }; | |
54 | ||
d2843c17 | 55 | void core_pr_dump_initiator_port( |
c66ac9db NB |
56 | struct t10_pr_registration *pr_reg, |
57 | char *buf, | |
58 | u32 size) | |
59 | { | |
6708bb27 | 60 | if (!pr_reg->isid_present_at_reg) |
d2843c17 | 61 | buf[0] = '\0'; |
c66ac9db | 62 | |
d2843c17 | 63 | snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); |
c66ac9db NB |
64 | } |
65 | ||
33ce6a87 AG |
66 | enum register_type { |
67 | REGISTER, | |
68 | REGISTER_AND_IGNORE_EXISTING_KEY, | |
69 | REGISTER_AND_MOVE, | |
70 | }; | |
71 | ||
72 | enum preempt_type { | |
73 | PREEMPT, | |
74 | PREEMPT_AND_ABORT, | |
75 | }; | |
76 | ||
c66ac9db | 77 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, |
6c3c9baa | 78 | struct t10_pr_registration *, int, int); |
c66ac9db | 79 | |
e673dc92 IT |
80 | static int is_reservation_holder( |
81 | struct t10_pr_registration *pr_res_holder, | |
82 | struct t10_pr_registration *pr_reg) | |
83 | { | |
84 | int pr_res_type; | |
85 | ||
86 | if (pr_res_holder) { | |
87 | pr_res_type = pr_res_holder->pr_res_type; | |
88 | ||
89 | return pr_res_holder == pr_reg || | |
90 | pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
91 | pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; | |
92 | } | |
93 | return 0; | |
94 | } | |
95 | ||
de103c93 CH |
96 | static sense_reason_t |
97 | target_scsi2_reservation_check(struct se_cmd *cmd) | |
c66ac9db | 98 | { |
d977f437 CH |
99 | struct se_device *dev = cmd->se_dev; |
100 | struct se_session *sess = cmd->se_sess; | |
101 | ||
102 | switch (cmd->t_task_cdb[0]) { | |
c66ac9db NB |
103 | case INQUIRY: |
104 | case RELEASE: | |
105 | case RELEASE_10: | |
106 | return 0; | |
107 | default: | |
d977f437 | 108 | break; |
c66ac9db NB |
109 | } |
110 | ||
d977f437 | 111 | if (!dev->dev_reserved_node_acl || !sess) |
c66ac9db NB |
112 | return 0; |
113 | ||
d977f437 | 114 | if (dev->dev_reserved_node_acl != sess->se_node_acl) |
de103c93 | 115 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
116 | |
117 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
118 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) | |
de103c93 | 119 | return TCM_RESERVATION_CONFLICT; |
c66ac9db | 120 | } |
c66ac9db | 121 | |
d977f437 | 122 | return 0; |
c66ac9db NB |
123 | } |
124 | ||
eacac00c CH |
125 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
126 | struct se_node_acl *, struct se_session *); | |
127 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
128 | ||
087a03b3 | 129 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
eacac00c CH |
130 | { |
131 | struct se_session *se_sess = cmd->se_sess; | |
0fd97ccf | 132 | struct se_device *dev = cmd->se_dev; |
eacac00c | 133 | struct t10_pr_registration *pr_reg; |
0fd97ccf | 134 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
eacac00c CH |
135 | int conflict = 0; |
136 | ||
eacac00c CH |
137 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
138 | se_sess); | |
139 | if (pr_reg) { | |
140 | /* | |
141 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
142 | * behavior | |
143 | * | |
144 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
145 | * status, but no reservation shall be established and the | |
146 | * persistent reservation shall not be changed, if the command | |
147 | * is received from a) and b) below. | |
148 | * | |
149 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
150 | * status, but the persistent reservation shall not be released, | |
151 | * if the command is received from a) and b) | |
152 | * | |
153 | * a) An I_T nexus that is a persistent reservation holder; or | |
154 | * b) An I_T nexus that is registered if a registrants only or | |
155 | * all registrants type persistent reservation is present. | |
156 | * | |
157 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
158 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
159 | * as defined in SPC-2. | |
160 | */ | |
161 | if (pr_reg->pr_res_holder) { | |
162 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 163 | return 1; |
eacac00c CH |
164 | } |
165 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
166 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
167 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
168 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
169 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 170 | return 1; |
eacac00c CH |
171 | } |
172 | core_scsi3_put_pr_reg(pr_reg); | |
173 | conflict = 1; | |
174 | } else { | |
175 | /* | |
176 | * Following spc2r20 5.5.1 Reservations overview: | |
177 | * | |
178 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
179 | * command with the REGISTER or the REGISTER AND IGNORE | |
180 | * EXISTING KEY service action and is still registered by any | |
181 | * initiator, all RESERVE commands and all RELEASE commands | |
182 | * regardless of initiator shall conflict and shall terminate | |
183 | * with a RESERVATION CONFLICT status. | |
184 | */ | |
185 | spin_lock(&pr_tmpl->registration_lock); | |
186 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
187 | spin_unlock(&pr_tmpl->registration_lock); | |
188 | } | |
189 | ||
190 | if (conflict) { | |
191 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
192 | " while active SPC-3 registrations exist," | |
193 | " returning RESERVATION_CONFLICT\n"); | |
087a03b3 | 194 | return -EBUSY; |
eacac00c CH |
195 | } |
196 | ||
087a03b3 | 197 | return 0; |
eacac00c CH |
198 | } |
199 | ||
de103c93 CH |
200 | sense_reason_t |
201 | target_scsi2_reservation_release(struct se_cmd *cmd) | |
c66ac9db NB |
202 | { |
203 | struct se_device *dev = cmd->se_dev; | |
204 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 205 | struct se_portal_group *tpg; |
de103c93 | 206 | int rc; |
c66ac9db | 207 | |
609234e3 | 208 | if (!sess || !sess->se_tpg) |
d29a5b6a | 209 | goto out; |
087a03b3 NB |
210 | rc = target_check_scsi2_reservation_conflict(cmd); |
211 | if (rc == 1) | |
d29a5b6a | 212 | goto out; |
de103c93 CH |
213 | if (rc < 0) |
214 | return TCM_RESERVATION_CONFLICT; | |
c66ac9db NB |
215 | |
216 | spin_lock(&dev->dev_reservation_lock); | |
d29a5b6a CH |
217 | if (!dev->dev_reserved_node_acl || !sess) |
218 | goto out_unlock; | |
219 | ||
220 | if (dev->dev_reserved_node_acl != sess->se_node_acl) | |
221 | goto out_unlock; | |
c66ac9db | 222 | |
edc318d9 BK |
223 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
224 | goto out_unlock; | |
225 | ||
c66ac9db | 226 | dev->dev_reserved_node_acl = NULL; |
0fd97ccf CH |
227 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
228 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
c66ac9db | 229 | dev->dev_res_bin_isid = 0; |
0fd97ccf | 230 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 231 | } |
609234e3 | 232 | tpg = sess->se_tpg; |
6708bb27 | 233 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
e3d6f909 AG |
234 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
235 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_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()); |
6708bb27 | 279 | pr_err("Original reserver LUN: %u %s\n", |
e3d6f909 | 280 | cmd->se_lun->unpacked_lun, |
c66ac9db | 281 | dev->dev_reserved_node_acl->initiatorname); |
6708bb27 | 282 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
e3d6f909 | 283 | " from %s \n", cmd->se_lun->unpacked_lun, |
c66ac9db NB |
284 | cmd->se_deve->mapped_lun, |
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 | } |
6708bb27 | 296 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
e3d6f909 AG |
297 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
298 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_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 | */ | |
316 | static int core_scsi3_pr_seq_non_holder( | |
317 | struct se_cmd *cmd, | |
c66ac9db NB |
318 | u32 pr_reg_type) |
319 | { | |
d977f437 | 320 | unsigned char *cdb = cmd->t_task_cdb; |
c66ac9db | 321 | struct se_dev_entry *se_deve; |
e3d6f909 | 322 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
323 | int other_cdb = 0, ignore_reg; |
324 | int registered_nexus = 0, ret = 1; /* Conflict by default */ | |
325 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
326 | int we = 0; /* Write Exclusive */ | |
327 | int legacy = 0; /* Act like a legacy device and return | |
328 | * RESERVATION CONFLICT on some CDBs */ | |
c66ac9db | 329 | |
f2083241 | 330 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
331 | /* |
332 | * Determine if the registration should be ignored due to | |
d977f437 | 333 | * non-matching ISIDs in target_scsi3_pr_reservation_check(). |
c66ac9db NB |
334 | */ |
335 | ignore_reg = (pr_reg_type & 0x80000000); | |
336 | if (ignore_reg) | |
337 | pr_reg_type &= ~0x80000000; | |
338 | ||
339 | switch (pr_reg_type) { | |
340 | case PR_TYPE_WRITE_EXCLUSIVE: | |
341 | we = 1; | |
342 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
343 | /* | |
344 | * Some commands are only allowed for the persistent reservation | |
345 | * holder. | |
346 | */ | |
347 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
348 | registered_nexus = 1; | |
349 | break; | |
350 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
351 | we = 1; | |
352 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
353 | /* | |
354 | * Some commands are only allowed for registered I_T Nexuses. | |
355 | */ | |
356 | reg_only = 1; | |
357 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
358 | registered_nexus = 1; | |
359 | break; | |
360 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
361 | we = 1; | |
362 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
363 | /* | |
364 | * Each registered I_T Nexus is a reservation holder. | |
365 | */ | |
366 | all_reg = 1; | |
367 | if ((se_deve->def_pr_registered) && !(ignore_reg)) | |
368 | registered_nexus = 1; | |
369 | break; | |
370 | default: | |
e3d6f909 | 371 | return -EINVAL; |
c66ac9db NB |
372 | } |
373 | /* | |
374 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
375 | */ | |
376 | switch (cdb[0]) { | |
377 | case SECURITY_PROTOCOL_IN: | |
378 | if (registered_nexus) | |
379 | return 0; | |
380 | ret = (we) ? 0 : 1; | |
381 | break; | |
382 | case MODE_SENSE: | |
383 | case MODE_SENSE_10: | |
384 | case READ_ATTRIBUTE: | |
385 | case READ_BUFFER: | |
386 | case RECEIVE_DIAGNOSTIC: | |
387 | if (legacy) { | |
388 | ret = 1; | |
389 | break; | |
390 | } | |
391 | if (registered_nexus) { | |
392 | ret = 0; | |
393 | break; | |
394 | } | |
395 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
396 | break; | |
397 | case PERSISTENT_RESERVE_OUT: | |
398 | /* | |
399 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
400 | * are allowed in the presence of various reservations. | |
401 | * See spc4r17, table 46 | |
402 | */ | |
403 | switch (cdb[1] & 0x1f) { | |
404 | case PRO_CLEAR: | |
405 | case PRO_PREEMPT: | |
406 | case PRO_PREEMPT_AND_ABORT: | |
407 | ret = (registered_nexus) ? 0 : 1; | |
408 | break; | |
409 | case PRO_REGISTER: | |
410 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
411 | ret = 0; | |
412 | break; | |
413 | case PRO_REGISTER_AND_MOVE: | |
414 | case PRO_RESERVE: | |
415 | ret = 1; | |
416 | break; | |
417 | case PRO_RELEASE: | |
418 | ret = (registered_nexus) ? 0 : 1; | |
419 | break; | |
420 | default: | |
6708bb27 | 421 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 422 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 423 | return -EINVAL; |
c66ac9db NB |
424 | } |
425 | break; | |
426 | case RELEASE: | |
427 | case RELEASE_10: | |
eacac00c | 428 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
429 | ret = 0; |
430 | break; | |
431 | case RESERVE: | |
432 | case RESERVE_10: | |
eacac00c | 433 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
434 | ret = 0; |
435 | break; | |
436 | case TEST_UNIT_READY: | |
437 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
438 | break; | |
439 | case MAINTENANCE_IN: | |
440 | switch (cdb[1] & 0x1f) { | |
441 | case MI_MANAGEMENT_PROTOCOL_IN: | |
442 | if (registered_nexus) { | |
443 | ret = 0; | |
444 | break; | |
445 | } | |
446 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
447 | break; | |
448 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
449 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
450 | if (legacy) { | |
451 | ret = 1; | |
452 | break; | |
453 | } | |
454 | if (registered_nexus) { | |
455 | ret = 0; | |
456 | break; | |
457 | } | |
458 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
459 | break; | |
460 | case MI_REPORT_ALIASES: | |
461 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
462 | case MI_REPORT_PRIORITY: | |
463 | case MI_REPORT_TARGET_PGS: | |
464 | case MI_REPORT_TIMESTAMP: | |
465 | ret = 0; /* Allowed */ | |
466 | break; | |
467 | default: | |
6708bb27 | 468 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 469 | (cdb[1] & 0x1f)); |
e3d6f909 | 470 | return -EINVAL; |
c66ac9db NB |
471 | } |
472 | break; | |
473 | case ACCESS_CONTROL_IN: | |
474 | case ACCESS_CONTROL_OUT: | |
475 | case INQUIRY: | |
476 | case LOG_SENSE: | |
85686f69 | 477 | case SERVICE_ACTION_IN_12: |
c66ac9db NB |
478 | case REPORT_LUNS: |
479 | case REQUEST_SENSE: | |
6816966a | 480 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
481 | ret = 0; /*/ Allowed CDBs */ |
482 | break; | |
483 | default: | |
484 | other_cdb = 1; | |
485 | break; | |
486 | } | |
487 | /* | |
25985edc | 488 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
489 | * statement. |
490 | */ | |
6708bb27 | 491 | if (!ret && !other_cdb) { |
125d0119 | 492 | pr_debug("Allowing explicit CDB: 0x%02x for %s" |
c66ac9db NB |
493 | " reservation holder\n", cdb[0], |
494 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 495 | |
c66ac9db NB |
496 | return ret; |
497 | } | |
498 | /* | |
499 | * Check if write exclusive initiator ports *NOT* holding the | |
500 | * WRITE_EXCLUSIVE_* reservation. | |
501 | */ | |
ee1b1b9c | 502 | if (we && !registered_nexus) { |
c66ac9db NB |
503 | if (cmd->data_direction == DMA_TO_DEVICE) { |
504 | /* | |
505 | * Conflict for write exclusive | |
506 | */ | |
6708bb27 | 507 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
508 | " %s CDB: 0x%02x to %s reservation\n", |
509 | transport_dump_cmd_direction(cmd), | |
510 | se_sess->se_node_acl->initiatorname, cdb[0], | |
511 | core_scsi3_pr_dump_type(pr_reg_type)); | |
512 | return 1; | |
513 | } else { | |
514 | /* | |
515 | * Allow non WRITE CDBs for all Write Exclusive | |
516 | * PR TYPEs to pass for registered and | |
517 | * non-registered_nexuxes NOT holding the reservation. | |
518 | * | |
519 | * We only make noise for the unregisterd nexuses, | |
520 | * as we expect registered non-reservation holding | |
521 | * nexuses to issue CDBs. | |
522 | */ | |
8b1e1244 | 523 | |
6708bb27 | 524 | if (!registered_nexus) { |
125d0119 | 525 | pr_debug("Allowing implicit CDB: 0x%02x" |
c66ac9db NB |
526 | " for %s reservation on unregistered" |
527 | " nexus\n", cdb[0], | |
528 | core_scsi3_pr_dump_type(pr_reg_type)); | |
529 | } | |
8b1e1244 | 530 | |
c66ac9db NB |
531 | return 0; |
532 | } | |
533 | } else if ((reg_only) || (all_reg)) { | |
534 | if (registered_nexus) { | |
535 | /* | |
536 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
537 | * allow commands from registered nexuses. | |
538 | */ | |
8b1e1244 | 539 | |
125d0119 | 540 | pr_debug("Allowing implicit CDB: 0x%02x for %s" |
c66ac9db NB |
541 | " reservation\n", cdb[0], |
542 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 543 | |
c66ac9db NB |
544 | return 0; |
545 | } | |
1ecc7586 LD |
546 | } else if (we && registered_nexus) { |
547 | /* | |
548 | * Reads are allowed for Write Exclusive locks | |
549 | * from all registrants. | |
550 | */ | |
551 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
552 | pr_debug("Allowing READ CDB: 0x%02x for %s" | |
553 | " reservation\n", cdb[0], | |
554 | core_scsi3_pr_dump_type(pr_reg_type)); | |
555 | ||
556 | return 0; | |
557 | } | |
c66ac9db | 558 | } |
6708bb27 | 559 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
560 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
561 | (registered_nexus) ? "" : "un", | |
562 | se_sess->se_node_acl->initiatorname, cdb[0], | |
563 | core_scsi3_pr_dump_type(pr_reg_type)); | |
564 | ||
565 | return 1; /* Conflict by default */ | |
566 | } | |
567 | ||
de103c93 CH |
568 | static sense_reason_t |
569 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) | |
d977f437 CH |
570 | { |
571 | struct se_device *dev = cmd->se_dev; | |
572 | struct se_session *sess = cmd->se_sess; | |
573 | u32 pr_reg_type; | |
574 | ||
575 | if (!dev->dev_pr_res_holder) | |
576 | return 0; | |
577 | ||
578 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
579 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
580 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) | |
581 | goto check_nonholder; | |
582 | ||
583 | if (dev->dev_pr_res_holder->isid_present_at_reg) { | |
584 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != | |
585 | sess->sess_bin_isid) { | |
586 | pr_reg_type |= 0x80000000; | |
587 | goto check_nonholder; | |
588 | } | |
589 | } | |
590 | ||
591 | return 0; | |
592 | ||
593 | check_nonholder: | |
594 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) | |
de103c93 | 595 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
596 | return 0; |
597 | } | |
598 | ||
c66ac9db NB |
599 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
600 | { | |
c66ac9db | 601 | u32 prg; |
0fd97ccf | 602 | |
c66ac9db NB |
603 | /* |
604 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
605 | * counter mainted by the device server. | |
606 | * | |
607 | * Note that this is done regardless of Active Persist across | |
608 | * Target PowerLoss (APTPL) | |
609 | * | |
610 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
611 | */ | |
612 | spin_lock(&dev->dev_reservation_lock); | |
0fd97ccf | 613 | prg = dev->t10_pr.pr_generation++; |
c66ac9db NB |
614 | spin_unlock(&dev->dev_reservation_lock); |
615 | ||
616 | return prg; | |
617 | } | |
618 | ||
c66ac9db NB |
619 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
620 | struct se_device *dev, | |
621 | struct se_node_acl *nacl, | |
622 | struct se_dev_entry *deve, | |
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; | |
643 | pr_reg->pr_reg_deve = deve; | |
644 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; | |
645 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; | |
646 | pr_reg->pr_res_key = sa_res_key; | |
647 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
648 | pr_reg->pr_reg_aptpl = aptpl; | |
649 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; | |
650 | /* | |
651 | * If an ISID value for this SCSI Initiator Port exists, | |
652 | * save it to the registration now. | |
653 | */ | |
654 | if (isid != NULL) { | |
655 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
656 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
657 | pr_reg->isid_present_at_reg = 1; | |
658 | } | |
659 | ||
660 | return pr_reg; | |
661 | } | |
662 | ||
663 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
664 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
665 | ||
666 | /* | |
667 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
668 | * modes. | |
669 | */ | |
670 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
671 | struct se_device *dev, | |
672 | struct se_node_acl *nacl, | |
673 | struct se_dev_entry *deve, | |
674 | unsigned char *isid, | |
675 | u64 sa_res_key, | |
676 | int all_tg_pt, | |
677 | int aptpl) | |
678 | { | |
679 | struct se_dev_entry *deve_tmp; | |
680 | struct se_node_acl *nacl_tmp; | |
681 | struct se_port *port, *port_tmp; | |
9ac8928e | 682 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db NB |
683 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; |
684 | int ret; | |
685 | /* | |
686 | * Create a registration for the I_T Nexus upon which the | |
687 | * PROUT REGISTER was received. | |
688 | */ | |
689 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, | |
690 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 691 | if (!pr_reg) |
c66ac9db NB |
692 | return NULL; |
693 | /* | |
694 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
695 | */ | |
6708bb27 | 696 | if (!all_tg_pt) |
c66ac9db NB |
697 | return pr_reg; |
698 | /* | |
699 | * Create list of matching SCSI Initiator Port registrations | |
700 | * for ALL_TG_PT=1 | |
701 | */ | |
702 | spin_lock(&dev->se_port_lock); | |
703 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { | |
33940d09 | 704 | atomic_inc_mb(&port->sep_tg_pt_ref_cnt); |
c66ac9db NB |
705 | spin_unlock(&dev->se_port_lock); |
706 | ||
707 | spin_lock_bh(&port->sep_alua_lock); | |
708 | list_for_each_entry(deve_tmp, &port->sep_alua_list, | |
709 | alua_port_list) { | |
710 | /* | |
711 | * This pointer will be NULL for demo mode MappedLUNs | |
125d0119 | 712 | * that have not been make explicit via a ConfigFS |
c66ac9db NB |
713 | * MappedLUN group for the SCSI Initiator Node ACL. |
714 | */ | |
6708bb27 | 715 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
716 | continue; |
717 | ||
718 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; | |
719 | /* | |
720 | * Skip the matching struct se_node_acl that is allocated | |
721 | * above.. | |
722 | */ | |
723 | if (nacl == nacl_tmp) | |
724 | continue; | |
725 | /* | |
726 | * Only perform PR registrations for target ports on | |
727 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
728 | * arrived. | |
729 | */ | |
730 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
731 | continue; | |
732 | /* | |
733 | * Look for a matching Initiator Node ACL in ASCII format | |
734 | */ | |
735 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
736 | continue; | |
737 | ||
33940d09 | 738 | atomic_inc_mb(&deve_tmp->pr_ref_count); |
c66ac9db NB |
739 | spin_unlock_bh(&port->sep_alua_lock); |
740 | /* | |
741 | * Grab a configfs group dependency that is released | |
742 | * for the exception path at label out: below, or upon | |
743 | * completion of adding ALL_TG_PT=1 registrations in | |
744 | * __core_scsi3_add_registration() | |
745 | */ | |
746 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
747 | if (ret < 0) { | |
6708bb27 | 748 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db | 749 | "_item() failed\n"); |
33940d09 JE |
750 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
751 | atomic_dec_mb(&deve_tmp->pr_ref_count); | |
c66ac9db NB |
752 | goto out; |
753 | } | |
754 | /* | |
755 | * Located a matching SCSI Initiator Port on a different | |
756 | * port, allocate the pr_reg_atp and attach it to the | |
757 | * pr_reg->pr_reg_atp_list that will be processed once | |
758 | * the original *pr_reg is processed in | |
759 | * __core_scsi3_add_registration() | |
760 | */ | |
761 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, | |
762 | nacl_tmp, deve_tmp, NULL, | |
763 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 764 | if (!pr_reg_atp) { |
33940d09 JE |
765 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
766 | atomic_dec_mb(&deve_tmp->pr_ref_count); | |
c66ac9db NB |
767 | core_scsi3_lunacl_undepend_item(deve_tmp); |
768 | goto out; | |
769 | } | |
770 | ||
771 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
772 | &pr_reg->pr_reg_atp_list); | |
773 | spin_lock_bh(&port->sep_alua_lock); | |
774 | } | |
775 | spin_unlock_bh(&port->sep_alua_lock); | |
776 | ||
777 | spin_lock(&dev->se_port_lock); | |
33940d09 | 778 | atomic_dec_mb(&port->sep_tg_pt_ref_cnt); |
c66ac9db NB |
779 | } |
780 | spin_unlock(&dev->se_port_lock); | |
781 | ||
782 | return pr_reg; | |
783 | out: | |
784 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
785 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
786 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
787 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
788 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
789 | } | |
790 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
791 | return NULL; | |
792 | } | |
793 | ||
794 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 795 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
796 | u64 sa_res_key, |
797 | unsigned char *i_port, | |
798 | unsigned char *isid, | |
799 | u32 mapped_lun, | |
800 | unsigned char *t_port, | |
801 | u16 tpgt, | |
802 | u32 target_lun, | |
803 | int res_holder, | |
804 | int all_tg_pt, | |
805 | u8 type) | |
806 | { | |
807 | struct t10_pr_registration *pr_reg; | |
808 | ||
6708bb27 AG |
809 | if (!i_port || !t_port || !sa_res_key) { |
810 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 811 | return -EINVAL; |
c66ac9db NB |
812 | } |
813 | ||
814 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
815 | if (!pr_reg) { |
816 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 817 | return -ENOMEM; |
c66ac9db | 818 | } |
c66ac9db NB |
819 | |
820 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
821 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
822 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
823 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
824 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
825 | atomic_set(&pr_reg->pr_res_holders, 0); | |
826 | pr_reg->pr_reg_nacl = NULL; | |
827 | pr_reg->pr_reg_deve = NULL; | |
828 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
829 | pr_reg->pr_aptpl_target_lun = target_lun; | |
830 | pr_reg->pr_res_key = sa_res_key; | |
831 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
832 | pr_reg->pr_reg_aptpl = 1; | |
833 | pr_reg->pr_reg_tg_pt_lun = NULL; | |
834 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ | |
835 | pr_reg->pr_res_type = type; | |
836 | /* | |
837 | * If an ISID value had been saved in APTPL metadata for this | |
838 | * SCSI Initiator Port, restore it now. | |
839 | */ | |
840 | if (isid != NULL) { | |
841 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
842 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
843 | pr_reg->isid_present_at_reg = 1; | |
844 | } | |
845 | /* | |
846 | * Copy the i_port and t_port information from caller. | |
847 | */ | |
848 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
849 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
850 | pr_reg->pr_reg_tpgt = tpgt; | |
851 | /* | |
852 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
853 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
854 | * the Initiator Node LUN ACL from the fabric module is created for | |
855 | * this registration. | |
856 | */ | |
857 | pr_reg->pr_res_holder = res_holder; | |
858 | ||
859 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 860 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
861 | " metadata\n", (res_holder) ? "+reservation" : ""); |
862 | return 0; | |
863 | } | |
864 | ||
865 | static void core_scsi3_aptpl_reserve( | |
866 | struct se_device *dev, | |
867 | struct se_portal_group *tpg, | |
868 | struct se_node_acl *node_acl, | |
869 | struct t10_pr_registration *pr_reg) | |
870 | { | |
871 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
872 | |
873 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 874 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
875 | |
876 | spin_lock(&dev->dev_reservation_lock); | |
877 | dev->dev_pr_res_holder = pr_reg; | |
878 | spin_unlock(&dev->dev_reservation_lock); | |
879 | ||
6708bb27 | 880 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 881 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 882 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
883 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
884 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 885 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 886 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
d2843c17 | 887 | i_buf); |
c66ac9db NB |
888 | } |
889 | ||
890 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
33ce6a87 | 891 | struct t10_pr_registration *, enum register_type, int); |
c66ac9db NB |
892 | |
893 | static int __core_scsi3_check_aptpl_registration( | |
894 | struct se_device *dev, | |
895 | struct se_portal_group *tpg, | |
896 | struct se_lun *lun, | |
897 | u32 target_lun, | |
898 | struct se_node_acl *nacl, | |
899 | struct se_dev_entry *deve) | |
900 | { | |
901 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 902 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
903 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
904 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
905 | u16 tpgt; | |
906 | ||
907 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
908 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
909 | /* | |
910 | * Copy Initiator Port information from struct se_node_acl | |
911 | */ | |
912 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
913 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
914 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
915 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
916 | /* |
917 | * Look for the matching registrations+reservation from those | |
918 | * created from APTPL metadata. Note that multiple registrations | |
919 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
920 | * TransportIDs. | |
921 | */ | |
922 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
923 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
924 | pr_reg_aptpl_list) { | |
92404e60 | 925 | |
6708bb27 | 926 | if (!strcmp(pr_reg->pr_iport, i_port) && |
c66ac9db NB |
927 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
928 | !(strcmp(pr_reg->pr_tport, t_port)) && | |
929 | (pr_reg->pr_reg_tpgt == tpgt) && | |
930 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
931 | ||
932 | pr_reg->pr_reg_nacl = nacl; | |
933 | pr_reg->pr_reg_deve = deve; | |
934 | pr_reg->pr_reg_tg_pt_lun = lun; | |
935 | ||
936 | list_del(&pr_reg->pr_reg_aptpl_list); | |
937 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
938 | /* | |
939 | * At this point all of the pointers in *pr_reg will | |
940 | * be setup, so go ahead and add the registration. | |
941 | */ | |
942 | ||
943 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); | |
944 | /* | |
945 | * If this registration is the reservation holder, | |
946 | * make that happen now.. | |
947 | */ | |
948 | if (pr_reg->pr_res_holder) | |
949 | core_scsi3_aptpl_reserve(dev, tpg, | |
950 | nacl, pr_reg); | |
951 | /* | |
952 | * Reenable pr_aptpl_active to accept new metadata | |
953 | * updates once the SCSI device is active again.. | |
954 | */ | |
955 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
956 | pr_tmpl->pr_aptpl_active = 1; | |
957 | } | |
958 | } | |
959 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | int core_scsi3_check_aptpl_registration( | |
965 | struct se_device *dev, | |
966 | struct se_portal_group *tpg, | |
967 | struct se_lun *lun, | |
e2480563 NB |
968 | struct se_node_acl *nacl, |
969 | u32 mapped_lun) | |
c66ac9db | 970 | { |
e2480563 | 971 | struct se_dev_entry *deve = nacl->device_list[mapped_lun]; |
c66ac9db | 972 | |
d977f437 | 973 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
c66ac9db NB |
974 | return 0; |
975 | ||
976 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
977 | lun->unpacked_lun, nacl, deve); | |
978 | } | |
979 | ||
980 | static void __core_scsi3_dump_registration( | |
9ac8928e | 981 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
982 | struct se_device *dev, |
983 | struct se_node_acl *nacl, | |
984 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 985 | enum register_type register_type) |
c66ac9db NB |
986 | { |
987 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
988 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
989 | |
990 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 991 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 992 | |
6708bb27 | 993 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
33ce6a87 AG |
994 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? |
995 | "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? | |
c66ac9db | 996 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, |
d2843c17 | 997 | i_buf); |
6708bb27 | 998 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
c66ac9db NB |
999 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
1000 | tfo->tpg_get_tag(se_tpg)); | |
6708bb27 | 1001 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1002 | " Port(s)\n", tfo->get_fabric_name(), |
1003 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1004 | dev->transport->name); |
6708bb27 | 1005 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1006 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
1007 | pr_reg->pr_res_key, pr_reg->pr_res_generation, | |
1008 | pr_reg->pr_reg_aptpl); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * this function can be called with struct se_device->dev_reservation_lock | |
1013 | * when register_move = 1 | |
1014 | */ | |
1015 | static void __core_scsi3_add_registration( | |
1016 | struct se_device *dev, | |
1017 | struct se_node_acl *nacl, | |
1018 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1019 | enum register_type register_type, |
c66ac9db NB |
1020 | int register_move) |
1021 | { | |
9ac8928e | 1022 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 1023 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
0fd97ccf | 1024 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1025 | |
1026 | /* | |
1027 | * Increment PRgeneration counter for struct se_device upon a successful | |
1028 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1029 | * | |
1030 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1031 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1032 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1033 | * for the REGISTER. | |
1034 | */ | |
1035 | pr_reg->pr_res_generation = (register_move) ? | |
0fd97ccf | 1036 | dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1037 | core_scsi3_pr_generation(dev); |
1038 | ||
1039 | spin_lock(&pr_tmpl->registration_lock); | |
1040 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
1041 | pr_reg->pr_reg_deve->def_pr_registered = 1; | |
1042 | ||
1043 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1044 | spin_unlock(&pr_tmpl->registration_lock); | |
1045 | /* | |
1046 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1047 | */ | |
6708bb27 | 1048 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
c66ac9db NB |
1049 | return; |
1050 | /* | |
1051 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1052 | * allocated in __core_scsi3_alloc_registration() | |
1053 | */ | |
1054 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1055 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
1056 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1057 | ||
1058 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1059 | ||
1060 | spin_lock(&pr_tmpl->registration_lock); | |
1061 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1062 | &pr_tmpl->registration_list); | |
1063 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; | |
1064 | ||
1065 | __core_scsi3_dump_registration(tfo, dev, | |
1066 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, | |
1067 | register_type); | |
1068 | spin_unlock(&pr_tmpl->registration_lock); | |
1069 | /* | |
1070 | * Drop configfs group dependency reference from | |
1071 | * __core_scsi3_alloc_registration() | |
1072 | */ | |
1073 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | static int core_scsi3_alloc_registration( | |
1078 | struct se_device *dev, | |
1079 | struct se_node_acl *nacl, | |
1080 | struct se_dev_entry *deve, | |
1081 | unsigned char *isid, | |
1082 | u64 sa_res_key, | |
1083 | int all_tg_pt, | |
1084 | int aptpl, | |
33ce6a87 | 1085 | enum register_type register_type, |
c66ac9db NB |
1086 | int register_move) |
1087 | { | |
1088 | struct t10_pr_registration *pr_reg; | |
1089 | ||
1090 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, | |
1091 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1092 | if (!pr_reg) |
e3d6f909 | 1093 | return -EPERM; |
c66ac9db NB |
1094 | |
1095 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1096 | register_type, register_move); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1101 | struct se_device *dev, | |
1102 | struct se_node_acl *nacl, | |
1103 | unsigned char *isid) | |
1104 | { | |
0fd97ccf | 1105 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1106 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1107 | struct se_portal_group *tpg; | |
1108 | ||
1109 | spin_lock(&pr_tmpl->registration_lock); | |
1110 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1111 | &pr_tmpl->registration_list, pr_reg_list) { | |
1112 | /* | |
1113 | * First look for a matching struct se_node_acl | |
1114 | */ | |
1115 | if (pr_reg->pr_reg_nacl != nacl) | |
1116 | continue; | |
1117 | ||
1118 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1119 | /* | |
1120 | * If this registration does NOT contain a fabric provided | |
1121 | * ISID, then we have found a match. | |
1122 | */ | |
6708bb27 | 1123 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1124 | /* |
1125 | * Determine if this SCSI device server requires that | |
1126 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1127 | * for fabric modules (iSCSI) requiring them. | |
1128 | */ | |
e3d6f909 | 1129 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
0fd97ccf | 1130 | if (dev->dev_attrib.enforce_pr_isids) |
c66ac9db NB |
1131 | continue; |
1132 | } | |
33940d09 | 1133 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1134 | spin_unlock(&pr_tmpl->registration_lock); |
1135 | return pr_reg; | |
1136 | } | |
1137 | /* | |
1138 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1139 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1140 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1141 | */ | |
6708bb27 | 1142 | if (!isid) |
c66ac9db NB |
1143 | continue; |
1144 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1145 | continue; | |
1146 | ||
33940d09 | 1147 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1148 | spin_unlock(&pr_tmpl->registration_lock); |
1149 | return pr_reg; | |
1150 | } | |
1151 | spin_unlock(&pr_tmpl->registration_lock); | |
1152 | ||
1153 | return NULL; | |
1154 | } | |
1155 | ||
1156 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1157 | struct se_device *dev, | |
1158 | struct se_node_acl *nacl, | |
1159 | struct se_session *sess) | |
1160 | { | |
1161 | struct se_portal_group *tpg = nacl->se_tpg; | |
1162 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1163 | ||
e3d6f909 | 1164 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1165 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1166 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1167 | PR_REG_ISID_LEN); |
1168 | isid_ptr = &buf[0]; | |
1169 | } | |
1170 | ||
1171 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1172 | } | |
1173 | ||
1174 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1175 | { | |
33940d09 | 1176 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1177 | } |
1178 | ||
125d0119 | 1179 | static int core_scsi3_check_implicit_release( |
c66ac9db NB |
1180 | struct se_device *dev, |
1181 | struct t10_pr_registration *pr_reg) | |
1182 | { | |
1183 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1184 | struct t10_pr_registration *pr_res_holder; | |
1185 | int ret = 0; | |
1186 | ||
1187 | spin_lock(&dev->dev_reservation_lock); | |
1188 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1189 | if (!pr_res_holder) { |
c66ac9db NB |
1190 | spin_unlock(&dev->dev_reservation_lock); |
1191 | return ret; | |
1192 | } | |
1193 | if (pr_res_holder == pr_reg) { | |
1194 | /* | |
125d0119 | 1195 | * Perform an implicit RELEASE if the registration that |
c66ac9db NB |
1196 | * is being released is holding the reservation. |
1197 | * | |
1198 | * From spc4r17, section 5.7.11.1: | |
1199 | * | |
1200 | * e) If the I_T nexus is the persistent reservation holder | |
1201 | * and the persistent reservation is not an all registrants | |
1202 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1203 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1204 | * service action with the SERVICE ACTION RESERVATION KEY | |
1205 | * field set to zero (see 5.7.11.3). | |
1206 | */ | |
6c3c9baa | 1207 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); |
c66ac9db NB |
1208 | ret = 1; |
1209 | /* | |
1210 | * For 'All Registrants' reservation types, all existing | |
1211 | * registrations are still processed as reservation holders | |
1212 | * in core_scsi3_pr_seq_non_holder() after the initial | |
125d0119 | 1213 | * reservation holder is implicitly released here. |
c66ac9db NB |
1214 | */ |
1215 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1216 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1217 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1218 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1219 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1220 | " UNREGISTER while existing reservation with matching" |
1221 | " key 0x%016Lx is present from another SCSI Initiator" | |
1222 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1223 | ret = -EPERM; |
c66ac9db NB |
1224 | } |
1225 | spin_unlock(&dev->dev_reservation_lock); | |
1226 | ||
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | /* | |
e3d6f909 | 1231 | * Called with struct t10_reservation->registration_lock held. |
c66ac9db NB |
1232 | */ |
1233 | static void __core_scsi3_free_registration( | |
1234 | struct se_device *dev, | |
1235 | struct t10_pr_registration *pr_reg, | |
1236 | struct list_head *preempt_and_abort_list, | |
1237 | int dec_holders) | |
cb0df4d3 BVA |
1238 | __releases(&pr_tmpl->registration_lock) |
1239 | __acquires(&pr_tmpl->registration_lock) | |
c66ac9db | 1240 | { |
9ac8928e | 1241 | const struct target_core_fabric_ops *tfo = |
c66ac9db | 1242 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
0fd97ccf | 1243 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1244 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
1245 | |
1246 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1247 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
1248 | |
1249 | pr_reg->pr_reg_deve->def_pr_registered = 0; | |
1250 | pr_reg->pr_reg_deve->pr_res_key = 0; | |
6c3c9baa NB |
1251 | if (!list_empty(&pr_reg->pr_reg_list)) |
1252 | list_del(&pr_reg->pr_reg_list); | |
c66ac9db NB |
1253 | /* |
1254 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1255 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1256 | */ | |
1257 | if (dec_holders) | |
1258 | core_scsi3_put_pr_reg(pr_reg); | |
1259 | /* | |
1260 | * Wait until all reference from any other I_T nexuses for this | |
1261 | * *pr_reg have been released. Because list_del() is called above, | |
1262 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1263 | * count back to zero, and we release *pr_reg. | |
1264 | */ | |
1265 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
1266 | spin_unlock(&pr_tmpl->registration_lock); | |
6708bb27 | 1267 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
c66ac9db NB |
1268 | tfo->get_fabric_name()); |
1269 | cpu_relax(); | |
1270 | spin_lock(&pr_tmpl->registration_lock); | |
1271 | } | |
1272 | ||
6708bb27 | 1273 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
c66ac9db NB |
1274 | " Node: %s%s\n", tfo->get_fabric_name(), |
1275 | pr_reg->pr_reg_nacl->initiatorname, | |
d2843c17 | 1276 | i_buf); |
6708bb27 | 1277 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
c66ac9db NB |
1278 | " Port(s)\n", tfo->get_fabric_name(), |
1279 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", | |
e3d6f909 | 1280 | dev->transport->name); |
6708bb27 | 1281 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
c66ac9db NB |
1282 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
1283 | pr_reg->pr_res_generation); | |
1284 | ||
6708bb27 | 1285 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1286 | pr_reg->pr_reg_deve = NULL; |
1287 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
1288 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1289 | return; | |
1290 | } | |
1291 | /* | |
1292 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1293 | * are released once the ABORT_TASK_SET has completed.. | |
1294 | */ | |
1295 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1296 | } | |
1297 | ||
1298 | void core_scsi3_free_pr_reg_from_nacl( | |
1299 | struct se_device *dev, | |
1300 | struct se_node_acl *nacl) | |
1301 | { | |
0fd97ccf | 1302 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1303 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
6c3c9baa | 1304 | bool free_reg = false; |
c66ac9db NB |
1305 | /* |
1306 | * If the passed se_node_acl matches the reservation holder, | |
1307 | * release the reservation. | |
1308 | */ | |
1309 | spin_lock(&dev->dev_reservation_lock); | |
1310 | pr_res_holder = dev->dev_pr_res_holder; | |
1311 | if ((pr_res_holder != NULL) && | |
6c3c9baa NB |
1312 | (pr_res_holder->pr_reg_nacl == nacl)) { |
1313 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); | |
1314 | free_reg = true; | |
1315 | } | |
c66ac9db NB |
1316 | spin_unlock(&dev->dev_reservation_lock); |
1317 | /* | |
1318 | * Release any registration associated with the struct se_node_acl. | |
1319 | */ | |
1320 | spin_lock(&pr_tmpl->registration_lock); | |
6c3c9baa NB |
1321 | if (pr_res_holder && free_reg) |
1322 | __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); | |
1323 | ||
c66ac9db NB |
1324 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
1325 | &pr_tmpl->registration_list, pr_reg_list) { | |
1326 | ||
1327 | if (pr_reg->pr_reg_nacl != nacl) | |
1328 | continue; | |
1329 | ||
1330 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1331 | } | |
1332 | spin_unlock(&pr_tmpl->registration_lock); | |
1333 | } | |
1334 | ||
1335 | void core_scsi3_free_all_registrations( | |
1336 | struct se_device *dev) | |
1337 | { | |
0fd97ccf | 1338 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1339 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1340 | ||
1341 | spin_lock(&dev->dev_reservation_lock); | |
1342 | pr_res_holder = dev->dev_pr_res_holder; | |
1343 | if (pr_res_holder != NULL) { | |
1344 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1345 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 1346 | pr_res_holder, 0, 0); |
c66ac9db NB |
1347 | } |
1348 | spin_unlock(&dev->dev_reservation_lock); | |
1349 | ||
1350 | spin_lock(&pr_tmpl->registration_lock); | |
1351 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1352 | &pr_tmpl->registration_list, pr_reg_list) { | |
1353 | ||
1354 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1355 | } | |
1356 | spin_unlock(&pr_tmpl->registration_lock); | |
1357 | ||
1358 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1359 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1360 | pr_reg_aptpl_list) { | |
1361 | list_del(&pr_reg->pr_reg_aptpl_list); | |
c66ac9db NB |
1362 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1363 | } | |
1364 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1365 | } | |
1366 | ||
1367 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1368 | { | |
d588cf8f | 1369 | return target_depend_item(&tpg->tpg_group.cg_item); |
c66ac9db NB |
1370 | } |
1371 | ||
1372 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1373 | { | |
d588cf8f | 1374 | target_undepend_item(&tpg->tpg_group.cg_item); |
33940d09 | 1375 | atomic_dec_mb(&tpg->tpg_pr_ref_count); |
c66ac9db NB |
1376 | } |
1377 | ||
1378 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1379 | { | |
c66ac9db NB |
1380 | if (nacl->dynamic_node_acl) |
1381 | return 0; | |
d588cf8f | 1382 | return target_depend_item(&nacl->acl_group.cg_item); |
c66ac9db NB |
1383 | } |
1384 | ||
1385 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1386 | { | |
d588cf8f CH |
1387 | if (!nacl->dynamic_node_acl) |
1388 | target_undepend_item(&nacl->acl_group.cg_item); | |
33940d09 | 1389 | atomic_dec_mb(&nacl->acl_pr_ref_count); |
c66ac9db NB |
1390 | } |
1391 | ||
1392 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1393 | { | |
1394 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1395 | struct se_node_acl *nacl; | |
1396 | struct se_portal_group *tpg; | |
1397 | /* | |
1398 | * For nacl->dynamic_node_acl=1 | |
1399 | */ | |
6708bb27 | 1400 | if (!lun_acl) |
c66ac9db NB |
1401 | return 0; |
1402 | ||
1403 | nacl = lun_acl->se_lun_nacl; | |
1404 | tpg = nacl->se_tpg; | |
1405 | ||
d588cf8f | 1406 | return target_depend_item(&lun_acl->se_lun_group.cg_item); |
c66ac9db NB |
1407 | } |
1408 | ||
1409 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1410 | { | |
1411 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; | |
1412 | struct se_node_acl *nacl; | |
1413 | struct se_portal_group *tpg; | |
1414 | /* | |
1415 | * For nacl->dynamic_node_acl=1 | |
1416 | */ | |
6708bb27 | 1417 | if (!lun_acl) { |
33940d09 | 1418 | atomic_dec_mb(&se_deve->pr_ref_count); |
c66ac9db NB |
1419 | return; |
1420 | } | |
1421 | nacl = lun_acl->se_lun_nacl; | |
1422 | tpg = nacl->se_tpg; | |
1423 | ||
d588cf8f | 1424 | target_undepend_item(&lun_acl->se_lun_group.cg_item); |
33940d09 | 1425 | atomic_dec_mb(&se_deve->pr_ref_count); |
c66ac9db NB |
1426 | } |
1427 | ||
de103c93 CH |
1428 | static sense_reason_t |
1429 | core_scsi3_decode_spec_i_port( | |
c66ac9db NB |
1430 | struct se_cmd *cmd, |
1431 | struct se_portal_group *tpg, | |
1432 | unsigned char *l_isid, | |
1433 | u64 sa_res_key, | |
1434 | int all_tg_pt, | |
1435 | int aptpl) | |
1436 | { | |
5951146d | 1437 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1438 | struct se_port *tmp_port; |
1439 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; | |
e3d6f909 | 1440 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db NB |
1441 | struct se_node_acl *dest_node_acl = NULL; |
1442 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; | |
1443 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; | |
1444 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1445 | LIST_HEAD(tid_dest_list); |
c66ac9db | 1446 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
2650d71e CH |
1447 | unsigned char *buf, *ptr, proto_ident; |
1448 | const unsigned char *i_str; | |
13ba564c | 1449 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 1450 | sense_reason_t ret; |
c66ac9db | 1451 | u32 tpdl, tid_len = 0; |
d2843c17 | 1452 | int dest_local_nexus; |
c66ac9db NB |
1453 | u32 dest_rtpi = 0; |
1454 | ||
f2083241 | 1455 | local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db NB |
1456 | /* |
1457 | * Allocate a struct pr_transport_id_holder and setup the | |
1458 | * local_node_acl and local_se_deve pointers and add to | |
1459 | * struct list_head tid_dest_list for add registration | |
1460 | * processing in the loop of tid_dest_list below. | |
1461 | */ | |
1462 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1463 | if (!tidh_new) { |
1464 | pr_err("Unable to allocate tidh_new\n"); | |
de103c93 | 1465 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1466 | } |
1467 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1468 | tidh_new->dest_tpg = tpg; | |
1469 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
1470 | tidh_new->dest_se_deve = local_se_deve; | |
1471 | ||
5951146d | 1472 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1473 | se_sess->se_node_acl, local_se_deve, l_isid, |
1474 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1475 | if (!local_pr_reg) { |
c66ac9db | 1476 | kfree(tidh_new); |
de103c93 | 1477 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
1478 | } |
1479 | tidh_new->dest_pr_reg = local_pr_reg; | |
1480 | /* | |
1481 | * The local I_T nexus does not hold any configfs dependances, | |
1482 | * so we set tid_h->dest_local_nexus=1 to prevent the | |
1483 | * configfs_undepend_item() calls in the tid_dest_list loops below. | |
1484 | */ | |
1485 | tidh_new->dest_local_nexus = 1; | |
1486 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
05d1c7c0 | 1487 | |
0d7f1299 PB |
1488 | if (cmd->data_length < 28) { |
1489 | pr_warn("SPC-PR: Received PR OUT parameter list" | |
1490 | " length too small: %u\n", cmd->data_length); | |
de103c93 | 1491 | ret = TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
1492 | goto out; |
1493 | } | |
1494 | ||
4949314c | 1495 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1496 | if (!buf) { |
1497 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1498 | goto out; | |
1499 | } | |
1500 | ||
c66ac9db NB |
1501 | /* |
1502 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1503 | * first extract TransportID Parameter Data Length, and make sure | |
1504 | * the value matches up to the SCSI expected data transfer length. | |
1505 | */ | |
1506 | tpdl = (buf[24] & 0xff) << 24; | |
1507 | tpdl |= (buf[25] & 0xff) << 16; | |
1508 | tpdl |= (buf[26] & 0xff) << 8; | |
1509 | tpdl |= buf[27] & 0xff; | |
1510 | ||
1511 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1512 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1513 | " does not equal CDB data_length: %u\n", tpdl, |
1514 | cmd->data_length); | |
de103c93 CH |
1515 | ret = TCM_INVALID_PARAMETER_LIST; |
1516 | goto out_unmap; | |
c66ac9db NB |
1517 | } |
1518 | /* | |
1519 | * Start processing the received transport IDs using the | |
1520 | * receiving I_T Nexus portal's fabric dependent methods to | |
1521 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1522 | */ | |
1523 | ptr = &buf[28]; | |
1524 | ||
1525 | while (tpdl > 0) { | |
1526 | proto_ident = (ptr[0] & 0x0f); | |
1527 | dest_tpg = NULL; | |
1528 | ||
1529 | spin_lock(&dev->se_port_lock); | |
1530 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { | |
1531 | tmp_tpg = tmp_port->sep_tpg; | |
6708bb27 | 1532 | if (!tmp_tpg) |
c66ac9db | 1533 | continue; |
2650d71e | 1534 | |
c66ac9db NB |
1535 | /* |
1536 | * Look for the matching proto_ident provided by | |
1537 | * the received TransportID | |
1538 | */ | |
2aeeafae | 1539 | if (tmp_tpg->proto_id != proto_ident) |
c66ac9db NB |
1540 | continue; |
1541 | dest_rtpi = tmp_port->sep_rtpi; | |
1542 | ||
2650d71e CH |
1543 | i_str = target_parse_pr_out_transport_id(tmp_tpg, |
1544 | (const char *)ptr, &tid_len, &iport_ptr); | |
6708bb27 | 1545 | if (!i_str) |
c66ac9db NB |
1546 | continue; |
1547 | ||
33940d09 | 1548 | atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); |
c66ac9db NB |
1549 | spin_unlock(&dev->se_port_lock); |
1550 | ||
de103c93 | 1551 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
6708bb27 | 1552 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db | 1553 | " for tmp_tpg\n"); |
33940d09 | 1554 | atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); |
de103c93 CH |
1555 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1556 | goto out_unmap; | |
c66ac9db NB |
1557 | } |
1558 | /* | |
35d1efe8 | 1559 | * Locate the destination initiator ACL to be registered |
c66ac9db NB |
1560 | * from the decoded fabric module specific TransportID |
1561 | * at *i_str. | |
1562 | */ | |
28638887 | 1563 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db NB |
1564 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1565 | tmp_tpg, i_str); | |
33940d09 JE |
1566 | if (dest_node_acl) |
1567 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
28638887 | 1568 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
c66ac9db | 1569 | |
6708bb27 | 1570 | if (!dest_node_acl) { |
c66ac9db NB |
1571 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1572 | spin_lock(&dev->se_port_lock); | |
1573 | continue; | |
1574 | } | |
1575 | ||
de103c93 | 1576 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
6708bb27 | 1577 | pr_err("configfs_depend_item() failed" |
c66ac9db | 1578 | " for dest_node_acl->acl_group\n"); |
33940d09 | 1579 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 1580 | core_scsi3_tpg_undepend_item(tmp_tpg); |
de103c93 CH |
1581 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1582 | goto out_unmap; | |
c66ac9db NB |
1583 | } |
1584 | ||
1585 | dest_tpg = tmp_tpg; | |
6708bb27 | 1586 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1587 | " %s Port RTPI: %hu\n", |
e3d6f909 | 1588 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1589 | dest_node_acl->initiatorname, dest_rtpi); |
1590 | ||
1591 | spin_lock(&dev->se_port_lock); | |
1592 | break; | |
1593 | } | |
1594 | spin_unlock(&dev->se_port_lock); | |
1595 | ||
6708bb27 AG |
1596 | if (!dest_tpg) { |
1597 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1598 | " dest_tpg\n"); |
de103c93 CH |
1599 | ret = TCM_INVALID_PARAMETER_LIST; |
1600 | goto out_unmap; | |
c66ac9db | 1601 | } |
8b1e1244 | 1602 | |
6708bb27 | 1603 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1604 | " tid_len: %d for %s + %s\n", |
e3d6f909 | 1605 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
c66ac9db | 1606 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1607 | |
c66ac9db | 1608 | if (tid_len > tpdl) { |
6708bb27 | 1609 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1610 | " %u for Transport ID: %s\n", tid_len, ptr); |
1611 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1612 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1613 | ret = TCM_INVALID_PARAMETER_LIST; |
1614 | goto out_unmap; | |
c66ac9db NB |
1615 | } |
1616 | /* | |
1617 | * Locate the desintation struct se_dev_entry pointer for matching | |
1618 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1619 | * Target Port. | |
1620 | */ | |
1621 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1622 | dest_rtpi); | |
6708bb27 AG |
1623 | if (!dest_se_deve) { |
1624 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1625 | " from destination RTPI: %hu\n", |
e3d6f909 | 1626 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1627 | dest_rtpi); |
1628 | ||
1629 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1630 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1631 | ret = TCM_INVALID_PARAMETER_LIST; |
1632 | goto out_unmap; | |
c66ac9db NB |
1633 | } |
1634 | ||
de103c93 | 1635 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 1636 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db | 1637 | " failed\n"); |
33940d09 | 1638 | atomic_dec_mb(&dest_se_deve->pr_ref_count); |
c66ac9db NB |
1639 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
1640 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1641 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1642 | goto out_unmap; | |
c66ac9db | 1643 | } |
8b1e1244 | 1644 | |
6708bb27 | 1645 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
c66ac9db | 1646 | " dest_se_deve mapped_lun: %u\n", |
e3d6f909 | 1647 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db | 1648 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1649 | |
c66ac9db NB |
1650 | /* |
1651 | * Skip any TransportIDs that already have a registration for | |
1652 | * this target port. | |
1653 | */ | |
1654 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1655 | iport_ptr); | |
1656 | if (pr_reg_e) { | |
1657 | core_scsi3_put_pr_reg(pr_reg_e); | |
1658 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1659 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1660 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1661 | ptr += tid_len; | |
1662 | tpdl -= tid_len; | |
1663 | tid_len = 0; | |
1664 | continue; | |
1665 | } | |
1666 | /* | |
1667 | * Allocate a struct pr_transport_id_holder and setup | |
1668 | * the dest_node_acl and dest_se_deve pointers for the | |
1669 | * loop below. | |
1670 | */ | |
1671 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1672 | GFP_KERNEL); | |
6708bb27 AG |
1673 | if (!tidh_new) { |
1674 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1675 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1676 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1677 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1678 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1679 | goto out_unmap; | |
c66ac9db NB |
1680 | } |
1681 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1682 | tidh_new->dest_tpg = dest_tpg; | |
1683 | tidh_new->dest_node_acl = dest_node_acl; | |
1684 | tidh_new->dest_se_deve = dest_se_deve; | |
1685 | ||
1686 | /* | |
1687 | * Allocate, but do NOT add the registration for the | |
1688 | * TransportID referenced SCSI Initiator port. This | |
1689 | * done because of the following from spc4r17 in section | |
1690 | * 6.14.3 wrt SPEC_I_PT: | |
1691 | * | |
1692 | * "If a registration fails for any initiator port (e.g., if th | |
1693 | * logical unit does not have enough resources available to | |
1694 | * hold the registration information), no registrations shall be | |
1695 | * made, and the command shall be terminated with | |
1696 | * CHECK CONDITION status." | |
1697 | * | |
1698 | * That means we call __core_scsi3_alloc_registration() here, | |
1699 | * and then call __core_scsi3_add_registration() in the | |
1700 | * 2nd loop which will never fail. | |
1701 | */ | |
5951146d | 1702 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
1703 | dest_node_acl, dest_se_deve, iport_ptr, |
1704 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1705 | if (!dest_pr_reg) { |
c66ac9db NB |
1706 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1707 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1708 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1709 | kfree(tidh_new); | |
de103c93 CH |
1710 | ret = TCM_INVALID_PARAMETER_LIST; |
1711 | goto out_unmap; | |
c66ac9db NB |
1712 | } |
1713 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1714 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1715 | ||
1716 | ptr += tid_len; | |
1717 | tpdl -= tid_len; | |
1718 | tid_len = 0; | |
1719 | ||
1720 | } | |
05d1c7c0 | 1721 | |
4949314c | 1722 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1723 | |
c66ac9db NB |
1724 | /* |
1725 | * Go ahead and create a registrations from tid_dest_list for the | |
1726 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1727 | * and dest_se_deve. | |
1728 | * | |
1729 | * The SA Reservation Key from the PROUT is set for the | |
1730 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1731 | * means that the TransportID Initiator port will be | |
1732 | * registered on all of the target ports in the SCSI target device | |
1733 | * ALL_TG_PT=0 means the registration will only be for the | |
1734 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1735 | * was received. | |
1736 | */ | |
1737 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1738 | dest_tpg = tidh->dest_tpg; | |
1739 | dest_node_acl = tidh->dest_node_acl; | |
1740 | dest_se_deve = tidh->dest_se_deve; | |
1741 | dest_pr_reg = tidh->dest_pr_reg; | |
1742 | dest_local_nexus = tidh->dest_local_nexus; | |
1743 | ||
1744 | list_del(&tidh->dest_list); | |
1745 | kfree(tidh); | |
1746 | ||
1747 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1748 | core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1749 | |
5951146d | 1750 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1751 | dest_pr_reg, 0, 0); |
1752 | ||
6708bb27 | 1753 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1754 | " registered Transport ID for Node: %s%s Mapped LUN:" |
e3d6f909 | 1755 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
d2843c17 | 1756 | dest_node_acl->initiatorname, i_buf, dest_se_deve->mapped_lun); |
c66ac9db NB |
1757 | |
1758 | if (dest_local_nexus) | |
1759 | continue; | |
1760 | ||
1761 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1762 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1763 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1764 | } | |
1765 | ||
1766 | return 0; | |
de103c93 | 1767 | out_unmap: |
4949314c | 1768 | transport_kunmap_data_sg(cmd); |
de103c93 | 1769 | out: |
c66ac9db NB |
1770 | /* |
1771 | * For the failure case, release everything from tid_dest_list | |
1772 | * including *dest_pr_reg and the configfs dependances.. | |
1773 | */ | |
1774 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1775 | dest_tpg = tidh->dest_tpg; | |
1776 | dest_node_acl = tidh->dest_node_acl; | |
1777 | dest_se_deve = tidh->dest_se_deve; | |
1778 | dest_pr_reg = tidh->dest_pr_reg; | |
1779 | dest_local_nexus = tidh->dest_local_nexus; | |
1780 | ||
1781 | list_del(&tidh->dest_list); | |
1782 | kfree(tidh); | |
1783 | /* | |
1784 | * Release any extra ALL_TG_PT=1 registrations for | |
1785 | * the SPEC_I_PT=1 case. | |
1786 | */ | |
1787 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1788 | &dest_pr_reg->pr_reg_atp_list, | |
1789 | pr_reg_atp_mem_list) { | |
1790 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1791 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1792 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1793 | } | |
1794 | ||
c66ac9db NB |
1795 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); |
1796 | ||
1797 | if (dest_local_nexus) | |
1798 | continue; | |
1799 | ||
1800 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1801 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1802 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1803 | } | |
1804 | return ret; | |
1805 | } | |
1806 | ||
3c8a6228 | 1807 | static int core_scsi3_update_aptpl_buf( |
c66ac9db NB |
1808 | struct se_device *dev, |
1809 | unsigned char *buf, | |
0607decd | 1810 | u32 pr_aptpl_buf_len) |
c66ac9db NB |
1811 | { |
1812 | struct se_lun *lun; | |
1813 | struct se_portal_group *tpg; | |
c66ac9db NB |
1814 | struct t10_pr_registration *pr_reg; |
1815 | unsigned char tmp[512], isid_buf[32]; | |
1816 | ssize_t len = 0; | |
1817 | int reg_count = 0; | |
3c8a6228 | 1818 | int ret = 0; |
c66ac9db | 1819 | |
3c8a6228 AG |
1820 | spin_lock(&dev->dev_reservation_lock); |
1821 | spin_lock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1822 | /* |
1823 | * Walk the registration list.. | |
1824 | */ | |
0fd97ccf | 1825 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
c66ac9db NB |
1826 | pr_reg_list) { |
1827 | ||
1828 | tmp[0] = '\0'; | |
1829 | isid_buf[0] = '\0'; | |
1830 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1831 | lun = pr_reg->pr_reg_tg_pt_lun; | |
1832 | /* | |
1833 | * Write out any ISID value to APTPL metadata that was included | |
1834 | * in the original registration. | |
1835 | */ | |
1836 | if (pr_reg->isid_present_at_reg) | |
1837 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1838 | pr_reg->pr_reg_isid); | |
1839 | /* | |
1840 | * Include special metadata if the pr_reg matches the | |
1841 | * reservation holder. | |
1842 | */ | |
1843 | if (dev->dev_pr_res_holder == pr_reg) { | |
1844 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1845 | "\ninitiator_fabric=%s\n" | |
1846 | "initiator_node=%s\n%s" | |
1847 | "sa_res_key=%llu\n" | |
1848 | "res_holder=1\nres_type=%02x\n" | |
1849 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
1850 | "mapped_lun=%u\n", reg_count, | |
e3d6f909 | 1851 | tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1852 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1853 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1854 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1855 | pr_reg->pr_res_mapped_lun); | |
1856 | } else { | |
1857 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1858 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1859 | "sa_res_key=%llu\nres_holder=0\n" | |
1860 | "res_all_tg_pt=%d\nmapped_lun=%u\n", | |
e3d6f909 | 1861 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
1862 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1863 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1864 | pr_reg->pr_res_mapped_lun); | |
1865 | } | |
1866 | ||
60d645a4 | 1867 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1868 | pr_err("Unable to update renaming APTPL metadata," |
1869 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1870 | ret = -EMSGSIZE; |
1871 | goto out; | |
c66ac9db NB |
1872 | } |
1873 | len += sprintf(buf+len, "%s", tmp); | |
1874 | ||
1875 | /* | |
1876 | * Include information about the associated SCSI target port. | |
1877 | */ | |
1878 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
1879 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" | |
e3d6f909 AG |
1880 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
1881 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), | |
1882 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
c66ac9db NB |
1883 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
1884 | ||
60d645a4 | 1885 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1886 | pr_err("Unable to update renaming APTPL metadata," |
1887 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1888 | ret = -EMSGSIZE; |
1889 | goto out; | |
c66ac9db NB |
1890 | } |
1891 | len += sprintf(buf+len, "%s", tmp); | |
1892 | reg_count++; | |
1893 | } | |
c66ac9db | 1894 | |
6708bb27 | 1895 | if (!reg_count) |
c66ac9db NB |
1896 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1897 | ||
3c8a6228 AG |
1898 | out: |
1899 | spin_unlock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1900 | spin_unlock(&dev->dev_reservation_lock); |
1901 | ||
1902 | return ret; | |
1903 | } | |
1904 | ||
c66ac9db NB |
1905 | static int __core_scsi3_write_aptpl_to_file( |
1906 | struct se_device *dev, | |
4dee96fb | 1907 | unsigned char *buf) |
c66ac9db | 1908 | { |
0fd97ccf | 1909 | struct t10_wwn *wwn = &dev->t10_wwn; |
c66ac9db | 1910 | struct file *file; |
c66ac9db NB |
1911 | int flags = O_RDWR | O_CREAT | O_TRUNC; |
1912 | char path[512]; | |
4dee96fb | 1913 | u32 pr_aptpl_buf_len; |
c66ac9db NB |
1914 | int ret; |
1915 | ||
c66ac9db NB |
1916 | memset(path, 0, 512); |
1917 | ||
60d645a4 | 1918 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
6708bb27 | 1919 | pr_err("WWN value for struct se_device does not fit" |
c66ac9db | 1920 | " into path buffer\n"); |
e3d6f909 | 1921 | return -EMSGSIZE; |
c66ac9db NB |
1922 | } |
1923 | ||
1924 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); | |
1925 | file = filp_open(path, flags, 0600); | |
0e9b10a9 | 1926 | if (IS_ERR(file)) { |
6708bb27 | 1927 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 1928 | " failed\n", path); |
0e9b10a9 | 1929 | return PTR_ERR(file); |
c66ac9db NB |
1930 | } |
1931 | ||
4dee96fb | 1932 | pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ |
c66ac9db | 1933 | |
0e9b10a9 | 1934 | ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); |
c66ac9db | 1935 | |
0e9b10a9 | 1936 | if (ret < 0) |
6708bb27 | 1937 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
0e9b10a9 | 1938 | fput(file); |
c66ac9db | 1939 | |
f730f915 | 1940 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
1941 | } |
1942 | ||
459f213b AG |
1943 | /* |
1944 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
1945 | * write out the updated metadata to struct file for this SCSI device. | |
1946 | */ | |
8a391857 | 1947 | static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) |
c66ac9db | 1948 | { |
8a391857 | 1949 | unsigned char *buf; |
f161d4b4 | 1950 | int rc, len = PR_APTPL_BUF_LEN; |
de103c93 | 1951 | |
459f213b AG |
1952 | if (!aptpl) { |
1953 | char *null_buf = "No Registrations or Reservations\n"; | |
1954 | ||
8a391857 | 1955 | rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); |
459f213b AG |
1956 | dev->t10_pr.pr_aptpl_active = 0; |
1957 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); | |
459f213b | 1958 | |
8a391857 NB |
1959 | if (rc) |
1960 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
459f213b | 1961 | |
8a391857 NB |
1962 | return 0; |
1963 | } | |
f161d4b4 NB |
1964 | retry: |
1965 | buf = vzalloc(len); | |
8a391857 NB |
1966 | if (!buf) |
1967 | return TCM_OUT_OF_RESOURCES; | |
1968 | ||
f161d4b4 | 1969 | rc = core_scsi3_update_aptpl_buf(dev, buf, len); |
8a391857 | 1970 | if (rc < 0) { |
f161d4b4 NB |
1971 | vfree(buf); |
1972 | len *= 2; | |
1973 | goto retry; | |
c66ac9db NB |
1974 | } |
1975 | ||
8a391857 NB |
1976 | rc = __core_scsi3_write_aptpl_to_file(dev, buf); |
1977 | if (rc != 0) { | |
1978 | pr_err("SPC-3 PR: Could not update APTPL\n"); | |
f161d4b4 | 1979 | vfree(buf); |
8a391857 NB |
1980 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1981 | } | |
1982 | dev->t10_pr.pr_aptpl_active = 1; | |
f161d4b4 | 1983 | vfree(buf); |
8a391857 NB |
1984 | pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); |
1985 | return 0; | |
c66ac9db NB |
1986 | } |
1987 | ||
de103c93 CH |
1988 | static sense_reason_t |
1989 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, | |
bc118fe4 | 1990 | bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) |
c66ac9db | 1991 | { |
e3d6f909 | 1992 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 1993 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1994 | struct se_dev_entry *se_deve; |
e3d6f909 | 1995 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 1996 | struct se_portal_group *se_tpg; |
bc118fe4 | 1997 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; |
0fd97ccf | 1998 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1999 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
a0d50f62 | 2000 | sense_reason_t ret = TCM_NO_SENSE; |
fc09149d | 2001 | int pr_holder = 0, type; |
c66ac9db | 2002 | |
6708bb27 AG |
2003 | if (!se_sess || !se_lun) { |
2004 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2005 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2006 | } |
2007 | se_tpg = se_sess->se_tpg; | |
f2083241 | 2008 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
c66ac9db | 2009 | |
e3d6f909 | 2010 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2011 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2012 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2013 | PR_REG_ISID_LEN); |
2014 | isid_ptr = &isid_buf[0]; | |
2015 | } | |
2016 | /* | |
2017 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2018 | */ | |
bc118fe4 AG |
2019 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
2020 | if (!pr_reg) { | |
c66ac9db | 2021 | if (res_key) { |
6708bb27 | 2022 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2023 | " for SA REGISTER, returning CONFLICT\n"); |
de103c93 | 2024 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2025 | } |
2026 | /* | |
2027 | * Do nothing but return GOOD status. | |
2028 | */ | |
6708bb27 | 2029 | if (!sa_res_key) |
03e98c9e | 2030 | return 0; |
c66ac9db | 2031 | |
6708bb27 | 2032 | if (!spec_i_pt) { |
c66ac9db NB |
2033 | /* |
2034 | * Perform the Service Action REGISTER on the Initiator | |
2035 | * Port Endpoint that the PRO was received from on the | |
2036 | * Logical Unit of the SCSI device server. | |
2037 | */ | |
de103c93 | 2038 | if (core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db NB |
2039 | se_sess->se_node_acl, se_deve, isid_ptr, |
2040 | sa_res_key, all_tg_pt, aptpl, | |
33ce6a87 | 2041 | register_type, 0)) { |
6708bb27 | 2042 | pr_err("Unable to allocate" |
c66ac9db | 2043 | " struct t10_pr_registration\n"); |
de103c93 | 2044 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2045 | } |
2046 | } else { | |
2047 | /* | |
2048 | * Register both the Initiator port that received | |
2049 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2050 | * TransportID from Parameter list and loop through | |
2051 | * fabric dependent parameter list while calling | |
2052 | * logic from of core_scsi3_alloc_registration() for | |
2053 | * each TransportID provided SCSI Initiator Port/Device | |
2054 | */ | |
2055 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2056 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2057 | if (ret != 0) | |
2058 | return ret; | |
2059 | } | |
c66ac9db | 2060 | |
459f213b | 2061 | return core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 CH |
2062 | } |
2063 | ||
bc118fe4 AG |
2064 | /* ok, existing registration */ |
2065 | ||
2066 | if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { | |
2067 | pr_err("SPC-3 PR REGISTER: Received" | |
2068 | " res_key: 0x%016Lx does not match" | |
2069 | " existing SA REGISTER res_key:" | |
2070 | " 0x%016Lx\n", res_key, | |
2071 | pr_reg->pr_res_key); | |
2072 | ret = TCM_RESERVATION_CONFLICT; | |
2073 | goto out; | |
de103c93 CH |
2074 | } |
2075 | ||
2076 | if (spec_i_pt) { | |
1f070cc2 AG |
2077 | pr_err("SPC-3 PR REGISTER: SPEC_I_PT" |
2078 | " set on a registered nexus\n"); | |
de103c93 | 2079 | ret = TCM_INVALID_PARAMETER_LIST; |
bc118fe4 | 2080 | goto out; |
de103c93 CH |
2081 | } |
2082 | ||
2083 | /* | |
2084 | * An existing ALL_TG_PT=1 registration being released | |
2085 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2086 | */ | |
1f070cc2 AG |
2087 | if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { |
2088 | pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" | |
de103c93 CH |
2089 | " registration exists, but ALL_TG_PT=1 bit not" |
2090 | " present in received PROUT\n"); | |
2091 | ret = TCM_INVALID_CDB_FIELD; | |
bc118fe4 | 2092 | goto out; |
de103c93 CH |
2093 | } |
2094 | ||
de103c93 | 2095 | /* |
51d9c41d | 2096 | * sa_res_key=1 Change Reservation Key for registered I_T Nexus. |
de103c93 | 2097 | */ |
51d9c41d AG |
2098 | if (sa_res_key) { |
2099 | /* | |
2100 | * Increment PRgeneration counter for struct se_device" | |
2101 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2102 | * READ_KEYS service action. | |
2103 | */ | |
2104 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); | |
2105 | pr_reg->pr_res_key = sa_res_key; | |
2106 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2107 | " Key for %s to: 0x%016Lx PRgeneration:" | |
2108 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), | |
2109 | (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", | |
2110 | pr_reg->pr_reg_nacl->initiatorname, | |
2111 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2112 | ||
2113 | } else { | |
2114 | /* | |
2115 | * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. | |
2116 | */ | |
6c3c9baa NB |
2117 | type = pr_reg->pr_res_type; |
2118 | pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, | |
2119 | pr_reg); | |
de103c93 | 2120 | if (pr_holder < 0) { |
de103c93 | 2121 | ret = TCM_RESERVATION_CONFLICT; |
bc118fe4 | 2122 | goto out; |
c66ac9db | 2123 | } |
de103c93 CH |
2124 | |
2125 | spin_lock(&pr_tmpl->registration_lock); | |
c66ac9db | 2126 | /* |
de103c93 CH |
2127 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
2128 | * and matching pr_res_key. | |
c66ac9db | 2129 | */ |
de103c93 CH |
2130 | if (pr_reg->pr_reg_all_tg_pt) { |
2131 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2132 | &pr_tmpl->registration_list, | |
2133 | pr_reg_list) { | |
2134 | ||
2135 | if (!pr_reg_p->pr_reg_all_tg_pt) | |
2136 | continue; | |
2137 | if (pr_reg_p->pr_res_key != res_key) | |
2138 | continue; | |
2139 | if (pr_reg == pr_reg_p) | |
2140 | continue; | |
2141 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2142 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2143 | continue; | |
2144 | ||
2145 | __core_scsi3_free_registration(dev, | |
2146 | pr_reg_p, NULL, 0); | |
c66ac9db NB |
2147 | } |
2148 | } | |
de103c93 | 2149 | |
c66ac9db | 2150 | /* |
de103c93 | 2151 | * Release the calling I_T Nexus registration now.. |
c66ac9db | 2152 | */ |
de103c93 | 2153 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
fc09149d | 2154 | pr_reg = NULL; |
c66ac9db | 2155 | |
de103c93 CH |
2156 | /* |
2157 | * From spc4r17, section 5.7.11.3 Unregistering | |
2158 | * | |
2159 | * If the persistent reservation is a registrants only | |
2160 | * type, the device server shall establish a unit | |
2161 | * attention condition for the initiator port associated | |
2162 | * with every registered I_T nexus except for the I_T | |
2163 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2164 | * received, with the additional sense code set to | |
2165 | * RESERVATIONS RELEASED. | |
2166 | */ | |
2167 | if (pr_holder && | |
fc09149d NB |
2168 | (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || |
2169 | type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { | |
de103c93 CH |
2170 | list_for_each_entry(pr_reg_p, |
2171 | &pr_tmpl->registration_list, | |
2172 | pr_reg_list) { | |
2173 | ||
2174 | core_scsi3_ua_allocate( | |
2175 | pr_reg_p->pr_reg_nacl, | |
2176 | pr_reg_p->pr_res_mapped_lun, | |
2177 | 0x2A, | |
2178 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
c66ac9db | 2179 | } |
de103c93 | 2180 | } |
c66ac9db | 2181 | |
51d9c41d | 2182 | spin_unlock(&pr_tmpl->registration_lock); |
de103c93 | 2183 | } |
c66ac9db | 2184 | |
459f213b | 2185 | ret = core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 | 2186 | |
bc118fe4 | 2187 | out: |
fc09149d NB |
2188 | if (pr_reg) |
2189 | core_scsi3_put_pr_reg(pr_reg); | |
de103c93 | 2190 | return ret; |
c66ac9db NB |
2191 | } |
2192 | ||
2193 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2194 | { | |
2195 | switch (type) { | |
2196 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2197 | return "Write Exclusive Access"; | |
2198 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2199 | return "Exclusive Access"; | |
2200 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2201 | return "Write Exclusive Access, Registrants Only"; | |
2202 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2203 | return "Exclusive Access, Registrants Only"; | |
2204 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2205 | return "Write Exclusive Access, All Registrants"; | |
2206 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2207 | return "Exclusive Access, All Registrants"; | |
2208 | default: | |
2209 | break; | |
2210 | } | |
2211 | ||
2212 | return "Unknown SPC-3 PR Type"; | |
2213 | } | |
2214 | ||
de103c93 CH |
2215 | static sense_reason_t |
2216 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) | |
c66ac9db | 2217 | { |
de103c93 | 2218 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2219 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2220 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2221 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
0fd97ccf | 2222 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2223 | char i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 2224 | sense_reason_t ret; |
c66ac9db NB |
2225 | |
2226 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2227 | ||
6708bb27 AG |
2228 | if (!se_sess || !se_lun) { |
2229 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2230 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2231 | } |
c66ac9db NB |
2232 | /* |
2233 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2234 | */ | |
5951146d | 2235 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2236 | se_sess); |
6708bb27 AG |
2237 | if (!pr_reg) { |
2238 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2239 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
de103c93 | 2240 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2241 | } |
2242 | /* | |
2243 | * From spc4r17 Section 5.7.9: Reserving: | |
2244 | * | |
2245 | * An application client creates a persistent reservation by issuing | |
2246 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2247 | * a registered I_T nexus with the following parameters: | |
2248 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2249 | * registered with the logical unit for the I_T nexus; and | |
2250 | */ | |
2251 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2252 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2253 | " does not match existing SA REGISTER res_key:" |
2254 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
2255 | ret = TCM_RESERVATION_CONFLICT; |
2256 | goto out_put_pr_reg; | |
c66ac9db NB |
2257 | } |
2258 | /* | |
2259 | * From spc4r17 Section 5.7.9: Reserving: | |
2260 | * | |
2261 | * From above: | |
2262 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2263 | * being created. | |
2264 | * | |
2265 | * Only one persistent reservation is allowed at a time per logical unit | |
2266 | * and that persistent reservation has a scope of LU_SCOPE. | |
2267 | */ | |
2268 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2269 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
de103c93 CH |
2270 | ret = TCM_INVALID_PARAMETER_LIST; |
2271 | goto out_put_pr_reg; | |
c66ac9db NB |
2272 | } |
2273 | /* | |
2274 | * See if we have an existing PR reservation holder pointer at | |
2275 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2276 | * *pr_res_holder. | |
2277 | */ | |
2278 | spin_lock(&dev->dev_reservation_lock); | |
2279 | pr_res_holder = dev->dev_pr_res_holder; | |
ee1b1b9c | 2280 | if (pr_res_holder) { |
c66ac9db NB |
2281 | /* |
2282 | * From spc4r17 Section 5.7.9: Reserving: | |
2283 | * | |
2284 | * If the device server receives a PERSISTENT RESERVE OUT | |
2285 | * command from an I_T nexus other than a persistent reservation | |
2286 | * holder (see 5.7.10) that attempts to create a persistent | |
2287 | * reservation when a persistent reservation already exists for | |
2288 | * the logical unit, then the command shall be completed with | |
2289 | * RESERVATION CONFLICT status. | |
2290 | */ | |
e673dc92 | 2291 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2292 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
6708bb27 | 2293 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2294 | " [%s]: %s while reservation already held by" |
2295 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2296 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2297 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2298 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2299 | pr_res_holder->pr_reg_nacl->initiatorname); |
2300 | ||
2301 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2302 | ret = TCM_RESERVATION_CONFLICT; |
2303 | goto out_put_pr_reg; | |
c66ac9db NB |
2304 | } |
2305 | /* | |
2306 | * From spc4r17 Section 5.7.9: Reserving: | |
2307 | * | |
2308 | * If a persistent reservation holder attempts to modify the | |
2309 | * type or scope of an existing persistent reservation, the | |
2310 | * command shall be completed with RESERVATION CONFLICT status. | |
2311 | */ | |
2312 | if ((pr_res_holder->pr_res_type != type) || | |
2313 | (pr_res_holder->pr_res_scope != scope)) { | |
2314 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2315 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2316 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2317 | " while reservation already held by [%s]: %s," | |
2318 | " returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2319 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2320 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2321 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2322 | pr_res_holder->pr_reg_nacl->initiatorname); |
2323 | ||
2324 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2325 | ret = TCM_RESERVATION_CONFLICT; |
2326 | goto out_put_pr_reg; | |
c66ac9db NB |
2327 | } |
2328 | /* | |
2329 | * From spc4r17 Section 5.7.9: Reserving: | |
2330 | * | |
2331 | * If the device server receives a PERSISTENT RESERVE OUT | |
2332 | * command with RESERVE service action where the TYPE field and | |
2333 | * the SCOPE field contain the same values as the existing type | |
2334 | * and scope from a persistent reservation holder, it shall not | |
2335 | * make any change to the existing persistent reservation and | |
2336 | * shall completethe command with GOOD status. | |
2337 | */ | |
2338 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2339 | ret = 0; |
2340 | goto out_put_pr_reg; | |
c66ac9db NB |
2341 | } |
2342 | /* | |
2343 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2344 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2345 | */ | |
2346 | pr_reg->pr_res_scope = scope; | |
2347 | pr_reg->pr_res_type = type; | |
2348 | pr_reg->pr_res_holder = 1; | |
2349 | dev->dev_pr_res_holder = pr_reg; | |
d2843c17 | 2350 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2351 | |
6708bb27 | 2352 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2353 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
e3d6f909 | 2354 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
c66ac9db | 2355 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2356 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
e3d6f909 | 2357 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2358 | se_sess->se_node_acl->initiatorname, |
d2843c17 | 2359 | i_buf); |
c66ac9db NB |
2360 | spin_unlock(&dev->dev_reservation_lock); |
2361 | ||
459f213b AG |
2362 | if (pr_tmpl->pr_aptpl_active) |
2363 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db | 2364 | |
de103c93 CH |
2365 | ret = 0; |
2366 | out_put_pr_reg: | |
c66ac9db | 2367 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2368 | return ret; |
c66ac9db NB |
2369 | } |
2370 | ||
de103c93 CH |
2371 | static sense_reason_t |
2372 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, | |
2373 | u64 res_key) | |
c66ac9db | 2374 | { |
c66ac9db NB |
2375 | switch (type) { |
2376 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2377 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2378 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2379 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2380 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2381 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 2382 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
c66ac9db | 2383 | default: |
6708bb27 | 2384 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2385 | " 0x%02x\n", type); |
de103c93 | 2386 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 2387 | } |
c66ac9db NB |
2388 | } |
2389 | ||
2390 | /* | |
2391 | * Called with struct se_device->dev_reservation_lock held. | |
2392 | */ | |
2393 | static void __core_scsi3_complete_pro_release( | |
2394 | struct se_device *dev, | |
2395 | struct se_node_acl *se_nacl, | |
2396 | struct t10_pr_registration *pr_reg, | |
6c3c9baa NB |
2397 | int explicit, |
2398 | int unreg) | |
c66ac9db | 2399 | { |
9ac8928e | 2400 | const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2401 | char i_buf[PR_REG_ISID_ID_LEN]; |
6c3c9baa | 2402 | int pr_res_type = 0, pr_res_scope = 0; |
c66ac9db NB |
2403 | |
2404 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2405 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
2406 | /* |
2407 | * Go ahead and release the current PR reservation holder. | |
6c3c9baa NB |
2408 | * If an All Registrants reservation is currently active and |
2409 | * a unregister operation is requested, replace the current | |
2410 | * dev_pr_res_holder with another active registration. | |
2411 | */ | |
2412 | if (dev->dev_pr_res_holder) { | |
2413 | pr_res_type = dev->dev_pr_res_holder->pr_res_type; | |
2414 | pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; | |
2415 | dev->dev_pr_res_holder->pr_res_type = 0; | |
2416 | dev->dev_pr_res_holder->pr_res_scope = 0; | |
2417 | dev->dev_pr_res_holder->pr_res_holder = 0; | |
2418 | dev->dev_pr_res_holder = NULL; | |
2419 | } | |
2420 | if (!unreg) | |
2421 | goto out; | |
c66ac9db | 2422 | |
6c3c9baa NB |
2423 | spin_lock(&dev->t10_pr.registration_lock); |
2424 | list_del_init(&pr_reg->pr_reg_list); | |
2425 | /* | |
2426 | * If the I_T nexus is a reservation holder, the persistent reservation | |
2427 | * is of an all registrants type, and the I_T nexus is the last remaining | |
2428 | * registered I_T nexus, then the device server shall also release the | |
2429 | * persistent reservation. | |
2430 | */ | |
2431 | if (!list_empty(&dev->t10_pr.registration_list) && | |
2432 | ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2433 | (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { | |
2434 | dev->dev_pr_res_holder = | |
2435 | list_entry(dev->t10_pr.registration_list.next, | |
2436 | struct t10_pr_registration, pr_reg_list); | |
2437 | dev->dev_pr_res_holder->pr_res_type = pr_res_type; | |
2438 | dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; | |
2439 | dev->dev_pr_res_holder->pr_res_holder = 1; | |
2440 | } | |
2441 | spin_unlock(&dev->t10_pr.registration_lock); | |
2442 | out: | |
2443 | if (!dev->dev_pr_res_holder) { | |
2444 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" | |
2445 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
2446 | tfo->get_fabric_name(), (explicit) ? "explicit" : | |
2447 | "implicit", core_scsi3_pr_dump_type(pr_res_type), | |
2448 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2449 | } | |
6708bb27 | 2450 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
c66ac9db | 2451 | tfo->get_fabric_name(), se_nacl->initiatorname, |
d2843c17 | 2452 | i_buf); |
c66ac9db NB |
2453 | /* |
2454 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2455 | */ | |
2456 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2457 | } | |
2458 | ||
de103c93 CH |
2459 | static sense_reason_t |
2460 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, | |
2461 | u64 res_key) | |
c66ac9db NB |
2462 | { |
2463 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2464 | struct se_session *se_sess = cmd->se_sess; |
2465 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2466 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
0fd97ccf | 2467 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
de103c93 | 2468 | sense_reason_t ret = 0; |
c66ac9db | 2469 | |
6708bb27 AG |
2470 | if (!se_sess || !se_lun) { |
2471 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2472 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2473 | } |
2474 | /* | |
2475 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2476 | */ | |
2477 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2478 | if (!pr_reg) { |
2479 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2480 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
de103c93 | 2481 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2482 | } |
2483 | /* | |
2484 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2485 | * | |
2486 | * If there is no persistent reservation or in response to a persistent | |
2487 | * reservation release request from a registered I_T nexus that is not a | |
2488 | * persistent reservation holder (see 5.7.10), the device server shall | |
2489 | * do the following: | |
2490 | * | |
2491 | * a) Not release the persistent reservation, if any; | |
2492 | * b) Not remove any registrations; and | |
2493 | * c) Complete the command with GOOD status. | |
2494 | */ | |
2495 | spin_lock(&dev->dev_reservation_lock); | |
2496 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2497 | if (!pr_res_holder) { |
c66ac9db NB |
2498 | /* |
2499 | * No persistent reservation, return GOOD status. | |
2500 | */ | |
2501 | spin_unlock(&dev->dev_reservation_lock); | |
bb7a8c8e | 2502 | goto out_put_pr_reg; |
c66ac9db | 2503 | } |
c66ac9db | 2504 | |
e673dc92 | 2505 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2506 | /* |
c66ac9db NB |
2507 | * Release request from a registered I_T nexus that is not a |
2508 | * persistent reservation holder. return GOOD status. | |
2509 | */ | |
2510 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 2511 | goto out_put_pr_reg; |
c66ac9db | 2512 | } |
de103c93 | 2513 | |
c66ac9db NB |
2514 | /* |
2515 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2516 | * | |
2517 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2518 | * release a persistent reservation. | |
2519 | * | |
2520 | * An application client releases the persistent reservation by issuing | |
2521 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2522 | * an I_T nexus that is a persistent reservation holder with the | |
2523 | * following parameters: | |
2524 | * | |
2525 | * a) RESERVATION KEY field set to the value of the reservation key | |
2526 | * that is registered with the logical unit for the I_T nexus; | |
2527 | */ | |
2528 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2529 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2530 | " does not match existing SA REGISTER res_key:" |
2531 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2532 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2533 | ret = TCM_RESERVATION_CONFLICT; |
2534 | goto out_put_pr_reg; | |
c66ac9db NB |
2535 | } |
2536 | /* | |
2537 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2538 | * | |
2539 | * b) TYPE field and SCOPE field set to match the persistent | |
2540 | * reservation being released. | |
2541 | */ | |
2542 | if ((pr_res_holder->pr_res_type != type) || | |
2543 | (pr_res_holder->pr_res_scope != scope)) { | |
2544 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2545 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2546 | " reservation from [%s]: %s with different TYPE " |
2547 | "and/or SCOPE while reservation already held by" | |
2548 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
e3d6f909 | 2549 | cmd->se_tfo->get_fabric_name(), |
c66ac9db | 2550 | se_sess->se_node_acl->initiatorname, |
e3d6f909 | 2551 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
c66ac9db NB |
2552 | pr_res_holder->pr_reg_nacl->initiatorname); |
2553 | ||
2554 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2555 | ret = TCM_RESERVATION_CONFLICT; |
2556 | goto out_put_pr_reg; | |
c66ac9db NB |
2557 | } |
2558 | /* | |
2559 | * In response to a persistent reservation release request from the | |
2560 | * persistent reservation holder the device server shall perform a | |
2561 | * release by doing the following as an uninterrupted series of actions: | |
2562 | * a) Release the persistent reservation; | |
2563 | * b) Not remove any registration(s); | |
2564 | * c) If the released persistent reservation is a registrants only type | |
2565 | * or all registrants type persistent reservation, | |
2566 | * the device server shall establish a unit attention condition for | |
2567 | * the initiator port associated with every regis- | |
2568 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2569 | * RESERVE OUT command with RELEASE service action was received, | |
2570 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2571 | * d) If the persistent reservation is of any other type, the device | |
2572 | * server shall not establish a unit attention condition. | |
2573 | */ | |
2574 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
6c3c9baa | 2575 | pr_reg, 1, 0); |
c66ac9db NB |
2576 | |
2577 | spin_unlock(&dev->dev_reservation_lock); | |
2578 | ||
2579 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2580 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2581 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2582 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2583 | /* | |
2584 | * If no UNIT ATTENTION conditions will be established for | |
2585 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2586 | * go ahead and check for APTPL=1 update+write below | |
2587 | */ | |
2588 | goto write_aptpl; | |
2589 | } | |
2590 | ||
2591 | spin_lock(&pr_tmpl->registration_lock); | |
2592 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2593 | pr_reg_list) { | |
2594 | /* | |
2595 | * Do not establish a UNIT ATTENTION condition | |
2596 | * for the calling I_T Nexus | |
2597 | */ | |
2598 | if (pr_reg_p == pr_reg) | |
2599 | continue; | |
2600 | ||
2601 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, | |
2602 | pr_reg_p->pr_res_mapped_lun, | |
2603 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2604 | } | |
2605 | spin_unlock(&pr_tmpl->registration_lock); | |
2606 | ||
2607 | write_aptpl: | |
459f213b AG |
2608 | if (pr_tmpl->pr_aptpl_active) |
2609 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
2610 | ||
de103c93 | 2611 | out_put_pr_reg: |
c66ac9db | 2612 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2613 | return ret; |
c66ac9db NB |
2614 | } |
2615 | ||
de103c93 CH |
2616 | static sense_reason_t |
2617 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) | |
c66ac9db NB |
2618 | { |
2619 | struct se_device *dev = cmd->se_dev; | |
2620 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 2621 | struct se_session *se_sess = cmd->se_sess; |
0fd97ccf | 2622 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
2623 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
2624 | u32 pr_res_mapped_lun = 0; | |
2625 | int calling_it_nexus = 0; | |
2626 | /* | |
2627 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2628 | */ | |
5951146d | 2629 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2630 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2631 | if (!pr_reg_n) { |
2632 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2633 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
de103c93 | 2634 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2635 | } |
2636 | /* | |
2637 | * From spc4r17 section 5.7.11.6, Clearing: | |
2638 | * | |
2639 | * Any application client may release the persistent reservation and | |
2640 | * remove all registrations from a device server by issuing a | |
2641 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2642 | * registered I_T nexus with the following parameter: | |
2643 | * | |
2644 | * a) RESERVATION KEY field set to the value of the reservation key | |
2645 | * that is registered with the logical unit for the I_T nexus. | |
2646 | */ | |
2647 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2648 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2649 | " res_key: 0x%016Lx does not match" |
2650 | " existing SA REGISTER res_key:" | |
2651 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2652 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2653 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2654 | } |
2655 | /* | |
2656 | * a) Release the persistent reservation, if any; | |
2657 | */ | |
2658 | spin_lock(&dev->dev_reservation_lock); | |
2659 | pr_res_holder = dev->dev_pr_res_holder; | |
2660 | if (pr_res_holder) { | |
2661 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2662 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 2663 | pr_res_holder, 0, 0); |
c66ac9db NB |
2664 | } |
2665 | spin_unlock(&dev->dev_reservation_lock); | |
2666 | /* | |
2667 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2668 | */ | |
2669 | spin_lock(&pr_tmpl->registration_lock); | |
2670 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2671 | &pr_tmpl->registration_list, pr_reg_list) { | |
2672 | ||
2673 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2674 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2675 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2676 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2677 | calling_it_nexus); | |
2678 | /* | |
2679 | * e) Establish a unit attention condition for the initiator | |
2680 | * port associated with every registered I_T nexus other | |
2681 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2682 | * command with CLEAR service action was received, with the | |
2683 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2684 | */ | |
6708bb27 | 2685 | if (!calling_it_nexus) |
c66ac9db NB |
2686 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
2687 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); | |
2688 | } | |
2689 | spin_unlock(&pr_tmpl->registration_lock); | |
2690 | ||
6708bb27 | 2691 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
e3d6f909 | 2692 | cmd->se_tfo->get_fabric_name()); |
c66ac9db | 2693 | |
459f213b | 2694 | core_scsi3_update_and_write_aptpl(cmd->se_dev, false); |
c66ac9db NB |
2695 | |
2696 | core_scsi3_pr_generation(dev); | |
2697 | return 0; | |
2698 | } | |
2699 | ||
2700 | /* | |
2701 | * Called with struct se_device->dev_reservation_lock held. | |
2702 | */ | |
2703 | static void __core_scsi3_complete_pro_preempt( | |
2704 | struct se_device *dev, | |
2705 | struct t10_pr_registration *pr_reg, | |
2706 | struct list_head *preempt_and_abort_list, | |
2707 | int type, | |
2708 | int scope, | |
33ce6a87 | 2709 | enum preempt_type preempt_type) |
c66ac9db NB |
2710 | { |
2711 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
9ac8928e | 2712 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2713 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db NB |
2714 | |
2715 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 2716 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2717 | /* |
125d0119 | 2718 | * Do an implicit RELEASE of the existing reservation. |
c66ac9db NB |
2719 | */ |
2720 | if (dev->dev_pr_res_holder) | |
2721 | __core_scsi3_complete_pro_release(dev, nacl, | |
6c3c9baa | 2722 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
2723 | |
2724 | dev->dev_pr_res_holder = pr_reg; | |
2725 | pr_reg->pr_res_holder = 1; | |
2726 | pr_reg->pr_res_type = type; | |
2727 | pr_reg->pr_res_scope = scope; | |
2728 | ||
6708bb27 | 2729 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db | 2730 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
33ce6a87 | 2731 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
c66ac9db NB |
2732 | core_scsi3_pr_dump_type(type), |
2733 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2734 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
33ce6a87 | 2735 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
d2843c17 | 2736 | nacl->initiatorname, i_buf); |
c66ac9db NB |
2737 | /* |
2738 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2739 | * struct t10_pr_registration to the list that will be compared | |
2740 | * against received CDBs.. | |
2741 | */ | |
2742 | if (preempt_and_abort_list) | |
2743 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2744 | preempt_and_abort_list); | |
2745 | } | |
2746 | ||
2747 | static void core_scsi3_release_preempt_and_abort( | |
2748 | struct list_head *preempt_and_abort_list, | |
2749 | struct t10_pr_registration *pr_reg_holder) | |
2750 | { | |
2751 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2752 | ||
2753 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2754 | pr_reg_abort_list) { | |
2755 | ||
2756 | list_del(&pr_reg->pr_reg_abort_list); | |
2757 | if (pr_reg_holder == pr_reg) | |
2758 | continue; | |
2759 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2760 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2761 | continue; |
2762 | } | |
2763 | ||
2764 | pr_reg->pr_reg_deve = NULL; | |
2765 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
2766 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
2767 | } | |
2768 | } | |
2769 | ||
de103c93 CH |
2770 | static sense_reason_t |
2771 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, | |
33ce6a87 | 2772 | u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 2773 | { |
5951146d | 2774 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2775 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2776 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2777 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2778 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
0fd97ccf | 2779 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2780 | u32 pr_res_mapped_lun = 0; |
b6932ee3 SA |
2781 | int all_reg = 0, calling_it_nexus = 0; |
2782 | bool sa_res_key_unmatched = sa_res_key != 0; | |
de103c93 | 2783 | int prh_type = 0, prh_scope = 0; |
c66ac9db | 2784 | |
de103c93 CH |
2785 | if (!se_sess) |
2786 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2787 | |
5951146d | 2788 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2789 | se_sess); |
6708bb27 AG |
2790 | if (!pr_reg_n) { |
2791 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2792 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
33ce6a87 | 2793 | (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); |
de103c93 | 2794 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2795 | } |
2796 | if (pr_reg_n->pr_res_key != res_key) { | |
2797 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2798 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2799 | } |
2800 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2801 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2802 | core_scsi3_put_pr_reg(pr_reg_n); |
de103c93 | 2803 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 2804 | } |
c66ac9db NB |
2805 | |
2806 | spin_lock(&dev->dev_reservation_lock); | |
2807 | pr_res_holder = dev->dev_pr_res_holder; | |
2808 | if (pr_res_holder && | |
2809 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2810 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2811 | all_reg = 1; | |
2812 | ||
6708bb27 | 2813 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
2814 | spin_unlock(&dev->dev_reservation_lock); |
2815 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2816 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2817 | } |
2818 | /* | |
2819 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
2820 | * | |
2821 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
2822 | * persistent reservation holder or there is no persistent reservation | |
2823 | * holder (i.e., there is no persistent reservation), then the device | |
2824 | * server shall perform a preempt by doing the following in an | |
2825 | * uninterrupted series of actions. (See below..) | |
2826 | */ | |
6708bb27 | 2827 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
2828 | /* |
2829 | * No existing or SA Reservation Key matching reservations.. | |
2830 | * | |
2831 | * PROUT SA PREEMPT with All Registrant type reservations are | |
2832 | * allowed to be processed without a matching SA Reservation Key | |
2833 | */ | |
2834 | spin_lock(&pr_tmpl->registration_lock); | |
2835 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2836 | &pr_tmpl->registration_list, pr_reg_list) { | |
2837 | /* | |
2838 | * Removing of registrations in non all registrants | |
2839 | * type reservations without a matching SA reservation | |
2840 | * key. | |
2841 | * | |
2842 | * a) Remove the registrations for all I_T nexuses | |
2843 | * specified by the SERVICE ACTION RESERVATION KEY | |
2844 | * field; | |
2845 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
2846 | * c) Process tasks as defined in 5.7.1; and | |
2847 | * d) Establish a unit attention condition for the | |
2848 | * initiator port associated with every I_T nexus | |
2849 | * that lost its registration other than the I_T | |
2850 | * nexus on which the PERSISTENT RESERVE OUT command | |
2851 | * was received, with the additional sense code set | |
2852 | * to REGISTRATIONS PREEMPTED. | |
2853 | */ | |
6708bb27 | 2854 | if (!all_reg) { |
c66ac9db NB |
2855 | if (pr_reg->pr_res_key != sa_res_key) |
2856 | continue; | |
b6932ee3 | 2857 | sa_res_key_unmatched = false; |
c66ac9db NB |
2858 | |
2859 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2860 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2861 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2862 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2863 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2864 | NULL, calling_it_nexus); |
c66ac9db NB |
2865 | } else { |
2866 | /* | |
2867 | * Case for any existing all registrants type | |
2868 | * reservation, follow logic in spc4r17 section | |
2869 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
2870 | * | |
2871 | * For a ZERO SA Reservation key, release | |
125d0119 | 2872 | * all other registrations and do an implicit |
c66ac9db NB |
2873 | * release of active persistent reservation. |
2874 | * | |
2875 | * For a non-ZERO SA Reservation key, only | |
2876 | * release the matching reservation key from | |
2877 | * registrations. | |
2878 | */ | |
2879 | if ((sa_res_key) && | |
2880 | (pr_reg->pr_res_key != sa_res_key)) | |
2881 | continue; | |
b6932ee3 | 2882 | sa_res_key_unmatched = false; |
c66ac9db NB |
2883 | |
2884 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2885 | if (calling_it_nexus) | |
2886 | continue; | |
2887 | ||
2888 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2889 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2890 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2891 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2892 | NULL, 0); |
c66ac9db | 2893 | } |
6708bb27 | 2894 | if (!calling_it_nexus) |
c66ac9db NB |
2895 | core_scsi3_ua_allocate(pr_reg_nacl, |
2896 | pr_res_mapped_lun, 0x2A, | |
9e08e34e | 2897 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
2898 | } |
2899 | spin_unlock(&pr_tmpl->registration_lock); | |
2900 | /* | |
2901 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
2902 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
2903 | * RESERVATION KEY field to a value that does not match any | |
2904 | * registered reservation key, then the device server shall | |
2905 | * complete the command with RESERVATION CONFLICT status. | |
2906 | */ | |
b6932ee3 | 2907 | if (sa_res_key_unmatched) { |
c66ac9db NB |
2908 | spin_unlock(&dev->dev_reservation_lock); |
2909 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2910 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2911 | } |
2912 | /* | |
2913 | * For an existing all registrants type reservation | |
2914 | * with a zero SA rservation key, preempt the existing | |
2915 | * reservation with the new PR type and scope. | |
2916 | */ | |
2917 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
2918 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
2919 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
2920 | type, scope, preempt_type); | |
c66ac9db | 2921 | |
33ce6a87 | 2922 | if (preempt_type == PREEMPT_AND_ABORT) |
c66ac9db NB |
2923 | core_scsi3_release_preempt_and_abort( |
2924 | &preempt_and_abort_list, pr_reg_n); | |
2925 | } | |
2926 | spin_unlock(&dev->dev_reservation_lock); | |
2927 | ||
459f213b AG |
2928 | if (pr_tmpl->pr_aptpl_active) |
2929 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
2930 | |
2931 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 2932 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
2933 | return 0; |
2934 | } | |
2935 | /* | |
2936 | * The PREEMPTing SA reservation key matches that of the | |
2937 | * existing persistent reservation, first, we check if | |
2938 | * we are preempting our own reservation. | |
2939 | * From spc4r17, section 5.7.11.4.3 Preempting | |
2940 | * persistent reservations and registration handling | |
2941 | * | |
2942 | * If an all registrants persistent reservation is not | |
2943 | * present, it is not an error for the persistent | |
2944 | * reservation holder to preempt itself (i.e., a | |
2945 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
2946 | * or a PREEMPT AND ABORT service action with the | |
2947 | * SERVICE ACTION RESERVATION KEY value equal to the | |
2948 | * persistent reservation holder's reservation key that | |
2949 | * is received from the persistent reservation holder). | |
2950 | * In that case, the device server shall establish the | |
2951 | * new persistent reservation and maintain the | |
2952 | * registration. | |
2953 | */ | |
2954 | prh_type = pr_res_holder->pr_res_type; | |
2955 | prh_scope = pr_res_holder->pr_res_scope; | |
2956 | /* | |
2957 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
2958 | * persistent reservation holder (see 5.7.10), the device | |
2959 | * server shall perform a preempt by doing the following as | |
2960 | * an uninterrupted series of actions: | |
2961 | * | |
2962 | * a) Release the persistent reservation for the holder | |
2963 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
2964 | */ | |
2965 | if (pr_reg_n != pr_res_holder) | |
2966 | __core_scsi3_complete_pro_release(dev, | |
6c3c9baa NB |
2967 | pr_res_holder->pr_reg_nacl, |
2968 | dev->dev_pr_res_holder, 0, 0); | |
c66ac9db NB |
2969 | /* |
2970 | * b) Remove the registrations for all I_T nexuses identified | |
2971 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
2972 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
2973 | * OUT command. If an all registrants persistent reservation | |
2974 | * is present and the SERVICE ACTION RESERVATION KEY field | |
2975 | * is set to zero, then all registrations shall be removed | |
2976 | * except for that of the I_T nexus that is being used for | |
2977 | * the PERSISTENT RESERVE OUT command; | |
2978 | */ | |
2979 | spin_lock(&pr_tmpl->registration_lock); | |
2980 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2981 | &pr_tmpl->registration_list, pr_reg_list) { | |
2982 | ||
2983 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2984 | if (calling_it_nexus) | |
2985 | continue; | |
2986 | ||
2987 | if (pr_reg->pr_res_key != sa_res_key) | |
2988 | continue; | |
2989 | ||
2990 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2991 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2992 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2993 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
c66ac9db NB |
2994 | calling_it_nexus); |
2995 | /* | |
2996 | * e) Establish a unit attention condition for the initiator | |
2997 | * port associated with every I_T nexus that lost its | |
2998 | * persistent reservation and/or registration, with the | |
2999 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3000 | */ | |
3001 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, | |
9e08e34e | 3002 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3003 | } |
3004 | spin_unlock(&pr_tmpl->registration_lock); | |
3005 | /* | |
3006 | * c) Establish a persistent reservation for the preempting | |
3007 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3008 | */ | |
3009 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
3010 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
3011 | type, scope, preempt_type); | |
c66ac9db NB |
3012 | /* |
3013 | * d) Process tasks as defined in 5.7.1; | |
3014 | * e) See above.. | |
3015 | * f) If the type or scope has changed, then for every I_T nexus | |
3016 | * whose reservation key was not removed, except for the I_T | |
3017 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3018 | * received, the device server shall establish a unit | |
3019 | * attention condition for the initiator port associated with | |
3020 | * that I_T nexus, with the additional sense code set to | |
3021 | * RESERVATIONS RELEASED. If the type or scope have not | |
3022 | * changed, then no unit attention condition(s) shall be | |
3023 | * established for this reason. | |
3024 | */ | |
3025 | if ((prh_type != type) || (prh_scope != scope)) { | |
3026 | spin_lock(&pr_tmpl->registration_lock); | |
3027 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3028 | &pr_tmpl->registration_list, pr_reg_list) { | |
3029 | ||
3030 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3031 | if (calling_it_nexus) | |
3032 | continue; | |
3033 | ||
3034 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, | |
3035 | pr_reg->pr_res_mapped_lun, 0x2A, | |
3036 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3037 | } | |
3038 | spin_unlock(&pr_tmpl->registration_lock); | |
3039 | } | |
3040 | spin_unlock(&dev->dev_reservation_lock); | |
3041 | /* | |
3042 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3043 | * All received CDBs for the matching existing reservation and | |
3044 | * registrations undergo ABORT_TASK logic. | |
3045 | * | |
3046 | * From there, core_scsi3_release_preempt_and_abort() will | |
3047 | * release every registration in the list (which have already | |
3048 | * been removed from the primary pr_reg list), except the | |
3049 | * new persistent reservation holder, the calling Initiator Port. | |
3050 | */ | |
33ce6a87 | 3051 | if (preempt_type == PREEMPT_AND_ABORT) { |
c66ac9db NB |
3052 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); |
3053 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3054 | pr_reg_n); | |
3055 | } | |
3056 | ||
459f213b AG |
3057 | if (pr_tmpl->pr_aptpl_active) |
3058 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
3059 | |
3060 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3061 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3062 | return 0; |
3063 | } | |
3064 | ||
de103c93 CH |
3065 | static sense_reason_t |
3066 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, | |
33ce6a87 | 3067 | u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 3068 | { |
c66ac9db NB |
3069 | switch (type) { |
3070 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3071 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3072 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3073 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3074 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3075 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 3076 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
33ce6a87 | 3077 | sa_res_key, preempt_type); |
c66ac9db | 3078 | default: |
6708bb27 | 3079 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
33ce6a87 | 3080 | " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); |
de103c93 | 3081 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 3082 | } |
c66ac9db NB |
3083 | } |
3084 | ||
3085 | ||
de103c93 CH |
3086 | static sense_reason_t |
3087 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, | |
3088 | u64 sa_res_key, int aptpl, int unreg) | |
c66ac9db | 3089 | { |
e3d6f909 | 3090 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3091 | struct se_device *dev = cmd->se_dev; |
28168905 | 3092 | struct se_dev_entry *dest_se_deve = NULL; |
e3d6f909 | 3093 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db NB |
3094 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
3095 | struct se_port *se_port; | |
3096 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; | |
9ac8928e | 3097 | const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; |
c66ac9db | 3098 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; |
0fd97ccf | 3099 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3100 | unsigned char *buf; |
2650d71e | 3101 | const unsigned char *initiator_str; |
13ba564c | 3102 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 3103 | u32 tid_len, tmp_tid_len; |
d2843c17 | 3104 | int new_reg = 0, type, scope, matching_iname; |
de103c93 | 3105 | sense_reason_t ret; |
c66ac9db NB |
3106 | unsigned short rtpi; |
3107 | unsigned char proto_ident; | |
3108 | ||
6708bb27 AG |
3109 | if (!se_sess || !se_lun) { |
3110 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 3111 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 3112 | } |
de103c93 | 3113 | |
c66ac9db NB |
3114 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
3115 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3116 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3117 | /* |
3118 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3119 | * Register behaviors for a REGISTER AND MOVE service action | |
3120 | * | |
3121 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3122 | */ | |
5951146d | 3123 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3124 | se_sess); |
6708bb27 AG |
3125 | if (!pr_reg) { |
3126 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3127 | " *pr_reg for REGISTER_AND_MOVE\n"); |
de103c93 | 3128 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3129 | } |
3130 | /* | |
3131 | * The provided reservation key much match the existing reservation key | |
3132 | * provided during this initiator's I_T nexus registration. | |
3133 | */ | |
3134 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3135 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3136 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3137 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
3138 | ret = TCM_RESERVATION_CONFLICT; |
3139 | goto out_put_pr_reg; | |
c66ac9db NB |
3140 | } |
3141 | /* | |
3142 | * The service active reservation key needs to be non zero | |
3143 | */ | |
6708bb27 AG |
3144 | if (!sa_res_key) { |
3145 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db | 3146 | " sa_res_key\n"); |
de103c93 CH |
3147 | ret = TCM_INVALID_PARAMETER_LIST; |
3148 | goto out_put_pr_reg; | |
c66ac9db | 3149 | } |
05d1c7c0 | 3150 | |
c66ac9db NB |
3151 | /* |
3152 | * Determine the Relative Target Port Identifier where the reservation | |
3153 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3154 | * information. | |
3155 | */ | |
4949314c | 3156 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3157 | if (!buf) { |
3158 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3159 | goto out_put_pr_reg; | |
3160 | } | |
3161 | ||
c66ac9db NB |
3162 | rtpi = (buf[18] & 0xff) << 8; |
3163 | rtpi |= buf[19] & 0xff; | |
3164 | tid_len = (buf[20] & 0xff) << 24; | |
3165 | tid_len |= (buf[21] & 0xff) << 16; | |
3166 | tid_len |= (buf[22] & 0xff) << 8; | |
3167 | tid_len |= buf[23] & 0xff; | |
4949314c | 3168 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3169 | buf = NULL; |
c66ac9db NB |
3170 | |
3171 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3172 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3173 | " does not equal CDB data_length: %u\n", tid_len, |
3174 | cmd->data_length); | |
de103c93 CH |
3175 | ret = TCM_INVALID_PARAMETER_LIST; |
3176 | goto out_put_pr_reg; | |
c66ac9db NB |
3177 | } |
3178 | ||
3179 | spin_lock(&dev->se_port_lock); | |
3180 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { | |
3181 | if (se_port->sep_rtpi != rtpi) | |
3182 | continue; | |
3183 | dest_se_tpg = se_port->sep_tpg; | |
6708bb27 | 3184 | if (!dest_se_tpg) |
c66ac9db | 3185 | continue; |
e3d6f909 | 3186 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3187 | if (!dest_tf_ops) |
c66ac9db NB |
3188 | continue; |
3189 | ||
33940d09 | 3190 | atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); |
c66ac9db NB |
3191 | spin_unlock(&dev->se_port_lock); |
3192 | ||
de103c93 | 3193 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
6708bb27 | 3194 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db | 3195 | " for dest_se_tpg\n"); |
33940d09 | 3196 | atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); |
de103c93 CH |
3197 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3198 | goto out_put_pr_reg; | |
c66ac9db NB |
3199 | } |
3200 | ||
3201 | spin_lock(&dev->se_port_lock); | |
3202 | break; | |
3203 | } | |
3204 | spin_unlock(&dev->se_port_lock); | |
3205 | ||
6708bb27 AG |
3206 | if (!dest_se_tpg || !dest_tf_ops) { |
3207 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3208 | " fabric ops from Relative Target Port Identifier:" |
3209 | " %hu\n", rtpi); | |
de103c93 CH |
3210 | ret = TCM_INVALID_PARAMETER_LIST; |
3211 | goto out_put_pr_reg; | |
c66ac9db | 3212 | } |
05d1c7c0 | 3213 | |
4949314c | 3214 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3215 | if (!buf) { |
3216 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3217 | goto out_put_pr_reg; | |
3218 | } | |
c66ac9db | 3219 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3220 | |
6708bb27 | 3221 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3222 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3223 | |
2aeeafae | 3224 | if (proto_ident != dest_se_tpg->proto_id) { |
6708bb27 | 3225 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3226 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3227 | " from fabric: %s\n", proto_ident, | |
2aeeafae | 3228 | dest_se_tpg->proto_id, |
c66ac9db | 3229 | dest_tf_ops->get_fabric_name()); |
de103c93 | 3230 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3231 | goto out; |
3232 | } | |
2650d71e | 3233 | initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, |
c66ac9db | 3234 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); |
6708bb27 AG |
3235 | if (!initiator_str) { |
3236 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3237 | " initiator_str from Transport ID\n"); |
de103c93 | 3238 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3239 | goto out; |
3240 | } | |
3241 | ||
4949314c | 3242 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3243 | buf = NULL; |
3244 | ||
6708bb27 | 3245 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
c66ac9db NB |
3246 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
3247 | "port" : "device", initiator_str, (iport_ptr != NULL) ? | |
3248 | iport_ptr : ""); | |
3249 | /* | |
3250 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3251 | * action specifies a TransportID that is the same as the initiator port | |
3252 | * of the I_T nexus for the command received, then the command shall | |
3253 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3254 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3255 | * IN PARAMETER LIST. | |
3256 | */ | |
3257 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3258 | matching_iname = (!strcmp(initiator_str, | |
3259 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3260 | if (!matching_iname) |
c66ac9db NB |
3261 | goto after_iport_check; |
3262 | ||
6708bb27 AG |
3263 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3264 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3265 | " matches: %s on received I_T Nexus\n", initiator_str, |
3266 | pr_reg_nacl->initiatorname); | |
de103c93 | 3267 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3268 | goto out; |
3269 | } | |
6708bb27 AG |
3270 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3271 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3272 | " matches: %s %s on received I_T Nexus\n", |
3273 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3274 | pr_reg->pr_reg_isid); | |
de103c93 | 3275 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3276 | goto out; |
3277 | } | |
3278 | after_iport_check: | |
3279 | /* | |
3280 | * Locate the destination struct se_node_acl from the received Transport ID | |
3281 | */ | |
28638887 | 3282 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db NB |
3283 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3284 | initiator_str); | |
33940d09 JE |
3285 | if (dest_node_acl) |
3286 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
28638887 | 3287 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
c66ac9db | 3288 | |
6708bb27 AG |
3289 | if (!dest_node_acl) { |
3290 | pr_err("Unable to locate %s dest_node_acl for" | |
c66ac9db NB |
3291 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
3292 | initiator_str); | |
de103c93 | 3293 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3294 | goto out; |
3295 | } | |
de103c93 CH |
3296 | |
3297 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { | |
6708bb27 | 3298 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db | 3299 | " dest_node_acl\n"); |
33940d09 | 3300 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 3301 | dest_node_acl = NULL; |
de103c93 | 3302 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3303 | goto out; |
3304 | } | |
8b1e1244 | 3305 | |
6708bb27 | 3306 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
c66ac9db NB |
3307 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
3308 | dest_node_acl->initiatorname); | |
8b1e1244 | 3309 | |
c66ac9db NB |
3310 | /* |
3311 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3312 | * PORT IDENTIFIER. | |
3313 | */ | |
3314 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3315 | if (!dest_se_deve) { |
3316 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
c66ac9db | 3317 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
de103c93 | 3318 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3319 | goto out; |
3320 | } | |
3321 | ||
de103c93 | 3322 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 3323 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
33940d09 | 3324 | atomic_dec_mb(&dest_se_deve->pr_ref_count); |
c66ac9db | 3325 | dest_se_deve = NULL; |
de103c93 | 3326 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3327 | goto out; |
3328 | } | |
8b1e1244 | 3329 | |
6708bb27 | 3330 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
c66ac9db NB |
3331 | " ACL for dest_se_deve->mapped_lun: %u\n", |
3332 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, | |
3333 | dest_se_deve->mapped_lun); | |
8b1e1244 | 3334 | |
c66ac9db NB |
3335 | /* |
3336 | * A persistent reservation needs to already existing in order to | |
3337 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3338 | */ | |
3339 | spin_lock(&dev->dev_reservation_lock); | |
3340 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3341 | if (!pr_res_holder) { |
3342 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3343 | " currently held\n"); |
3344 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3345 | ret = TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3346 | goto out; |
3347 | } | |
3348 | /* | |
3349 | * The received on I_T Nexus must be the reservation holder. | |
3350 | * | |
3351 | * From spc4r17 section 5.7.8 Table 50 -- | |
3352 | * Register behaviors for a REGISTER AND MOVE service action | |
3353 | */ | |
e673dc92 | 3354 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
6708bb27 | 3355 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3356 | " Nexus is not reservation holder\n"); |
3357 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3358 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3359 | goto out; |
3360 | } | |
3361 | /* | |
3362 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3363 | * | |
3364 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3365 | * action is received and the established persistent reservation is a | |
3366 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3367 | * All Registrants type reservation, then the command shall be completed | |
3368 | * with RESERVATION CONFLICT status. | |
3369 | */ | |
3370 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3371 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3372 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3373 | " reservation for type: %s\n", |
3374 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3375 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3376 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3377 | goto out; |
3378 | } | |
3379 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3380 | /* | |
3381 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3382 | */ | |
3383 | type = pr_res_holder->pr_res_type; | |
3384 | scope = pr_res_holder->pr_res_type; | |
3385 | /* | |
3386 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3387 | * RESERVATION KEY field with the I_T nexus specified as the | |
3388 | * destination of the register and move, where: | |
3389 | * A) The I_T nexus is specified by the TransportID and the | |
3390 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3391 | * B) Regardless of the TransportID format used, the association for | |
3392 | * the initiator port is based on either the initiator port name | |
3393 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3394 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3395 | * transport protocols where port names are not required; | |
3396 | * d) Register the reservation key specified in the SERVICE ACTION | |
3397 | * RESERVATION KEY field; | |
3398 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3399 | * RESERVATION KEY field and associated information; | |
3400 | * | |
3401 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3402 | * register an I_T nexus that is already registered with the same | |
3403 | * reservation key or a different reservation key. | |
3404 | */ | |
3405 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3406 | iport_ptr); | |
6708bb27 | 3407 | if (!dest_pr_reg) { |
de103c93 | 3408 | if (core_scsi3_alloc_registration(cmd->se_dev, |
c66ac9db | 3409 | dest_node_acl, dest_se_deve, iport_ptr, |
de103c93 | 3410 | sa_res_key, 0, aptpl, 2, 1)) { |
c66ac9db | 3411 | spin_unlock(&dev->dev_reservation_lock); |
de103c93 | 3412 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3413 | goto out; |
3414 | } | |
3415 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3416 | iport_ptr); | |
3417 | new_reg = 1; | |
3418 | } | |
3419 | /* | |
3420 | * f) Release the persistent reservation for the persistent reservation | |
3421 | * holder (i.e., the I_T nexus on which the | |
3422 | */ | |
3423 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 3424 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
3425 | /* |
3426 | * g) Move the persistent reservation to the specified I_T nexus using | |
3427 | * the same scope and type as the persistent reservation released in | |
3428 | * item f); and | |
3429 | */ | |
3430 | dev->dev_pr_res_holder = dest_pr_reg; | |
3431 | dest_pr_reg->pr_res_holder = 1; | |
3432 | dest_pr_reg->pr_res_type = type; | |
3433 | pr_reg->pr_res_scope = scope; | |
d2843c17 | 3434 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
3435 | /* |
3436 | * Increment PRGeneration for existing registrations.. | |
3437 | */ | |
6708bb27 | 3438 | if (!new_reg) |
c66ac9db NB |
3439 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3440 | spin_unlock(&dev->dev_reservation_lock); | |
3441 | ||
6708bb27 | 3442 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db NB |
3443 | " created new reservation holder TYPE: %s on object RTPI:" |
3444 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), | |
3445 | core_scsi3_pr_dump_type(type), rtpi, | |
3446 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3447 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db NB |
3448 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
3449 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, | |
d2843c17 | 3450 | i_buf, dest_tf_ops->get_fabric_name(), |
c66ac9db NB |
3451 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? |
3452 | iport_ptr : ""); | |
3453 | /* | |
3454 | * It is now safe to release configfs group dependencies for destination | |
3455 | * of Transport ID Initiator Device/Port Identifier | |
3456 | */ | |
3457 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3458 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3459 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3460 | /* | |
3461 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3462 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3463 | */ | |
3464 | if (unreg) { | |
3465 | spin_lock(&pr_tmpl->registration_lock); | |
3466 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3467 | spin_unlock(&pr_tmpl->registration_lock); | |
3468 | } else | |
3469 | core_scsi3_put_pr_reg(pr_reg); | |
3470 | ||
459f213b | 3471 | core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); |
c66ac9db | 3472 | |
4949314c | 3473 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3474 | |
c66ac9db NB |
3475 | core_scsi3_put_pr_reg(dest_pr_reg); |
3476 | return 0; | |
3477 | out: | |
05d1c7c0 | 3478 | if (buf) |
4949314c | 3479 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3480 | if (dest_se_deve) |
3481 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3482 | if (dest_node_acl) | |
3483 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3484 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
de103c93 CH |
3485 | |
3486 | out_put_pr_reg: | |
c66ac9db NB |
3487 | core_scsi3_put_pr_reg(pr_reg); |
3488 | return ret; | |
3489 | } | |
3490 | ||
3491 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) | |
3492 | { | |
3493 | unsigned int __v1, __v2; | |
3494 | ||
3495 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; | |
3496 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; | |
3497 | ||
3498 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
3499 | } | |
3500 | ||
3501 | /* | |
3502 | * See spc4r17 section 6.14 Table 170 | |
3503 | */ | |
de103c93 CH |
3504 | sense_reason_t |
3505 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) | |
c66ac9db | 3506 | { |
92404e60 | 3507 | struct se_device *dev = cmd->se_dev; |
617c0e06 | 3508 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3509 | unsigned char *buf; |
c66ac9db NB |
3510 | u64 res_key, sa_res_key; |
3511 | int sa, scope, type, aptpl; | |
3512 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
de103c93 | 3513 | sense_reason_t ret; |
617c0e06 CH |
3514 | |
3515 | /* | |
3516 | * Following spc2r20 5.5.1 Reservations overview: | |
3517 | * | |
3518 | * If a logical unit has been reserved by any RESERVE command and is | |
3519 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3520 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3521 | * initiator or service action and shall terminate with a RESERVATION | |
3522 | * CONFLICT status. | |
3523 | */ | |
0fd97ccf | 3524 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
617c0e06 CH |
3525 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
3526 | " SPC-2 reservation is held, returning" | |
3527 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 3528 | return TCM_RESERVATION_CONFLICT; |
617c0e06 CH |
3529 | } |
3530 | ||
c66ac9db NB |
3531 | /* |
3532 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3533 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3534 | */ | |
de103c93 CH |
3535 | if (!cmd->se_sess) |
3536 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db NB |
3537 | |
3538 | if (cmd->data_length < 24) { | |
6708bb27 | 3539 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3540 | " length too small: %u\n", cmd->data_length); |
de103c93 | 3541 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3542 | } |
de103c93 | 3543 | |
c66ac9db NB |
3544 | /* |
3545 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3546 | */ | |
3547 | sa = (cdb[1] & 0x1f); | |
3548 | scope = (cdb[2] & 0xf0); | |
3549 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3550 | |
4949314c | 3551 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3552 | if (!buf) |
3553 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3554 | ||
c66ac9db NB |
3555 | /* |
3556 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3557 | */ | |
3558 | res_key = core_scsi3_extract_reservation_key(&buf[0]); | |
3559 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); | |
3560 | /* | |
3561 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3562 | * SCSI TransportIDs. | |
3563 | */ | |
3564 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3565 | spec_i_pt = (buf[20] & 0x08); | |
3566 | all_tg_pt = (buf[20] & 0x04); | |
3567 | aptpl = (buf[20] & 0x01); | |
3568 | } else { | |
3569 | aptpl = (buf[17] & 0x01); | |
3570 | unreg = (buf[17] & 0x02); | |
3571 | } | |
92404e60 NB |
3572 | /* |
3573 | * If the backend device has been configured to force APTPL metadata | |
3574 | * write-out, go ahead and propigate aptpl=1 down now. | |
3575 | */ | |
3576 | if (dev->dev_attrib.force_pr_aptpl) | |
3577 | aptpl = 1; | |
3578 | ||
4949314c | 3579 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3580 | buf = NULL; |
3581 | ||
c66ac9db NB |
3582 | /* |
3583 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3584 | */ | |
de103c93 CH |
3585 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) |
3586 | return TCM_INVALID_PARAMETER_LIST; | |
d29a5b6a | 3587 | |
c66ac9db NB |
3588 | /* |
3589 | * From spc4r17 section 6.14: | |
3590 | * | |
3591 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3592 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3593 | * the command shall be terminated with CHECK CONDITION status, with | |
3594 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3595 | * code set to PARAMETER LIST LENGTH ERROR. | |
3596 | */ | |
6708bb27 | 3597 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3598 | (cmd->data_length != 24)) { |
6708bb27 | 3599 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3600 | " list length: %u\n", cmd->data_length); |
de103c93 | 3601 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 3602 | } |
de103c93 | 3603 | |
c66ac9db NB |
3604 | /* |
3605 | * (core_scsi3_emulate_pro_* function parameters | |
3606 | * are defined by spc4r17 Table 174: | |
3607 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3608 | */ | |
3609 | switch (sa) { | |
3610 | case PRO_REGISTER: | |
d29a5b6a | 3611 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3612 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); |
d29a5b6a | 3613 | break; |
c66ac9db | 3614 | case PRO_RESERVE: |
d29a5b6a CH |
3615 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3616 | break; | |
c66ac9db | 3617 | case PRO_RELEASE: |
d29a5b6a CH |
3618 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3619 | break; | |
c66ac9db | 3620 | case PRO_CLEAR: |
d29a5b6a CH |
3621 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3622 | break; | |
c66ac9db | 3623 | case PRO_PREEMPT: |
d29a5b6a | 3624 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3625 | res_key, sa_res_key, PREEMPT); |
d29a5b6a | 3626 | break; |
c66ac9db | 3627 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3628 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3629 | res_key, sa_res_key, PREEMPT_AND_ABORT); |
d29a5b6a | 3630 | break; |
c66ac9db | 3631 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3632 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3633 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); |
d29a5b6a | 3634 | break; |
c66ac9db | 3635 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3636 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3637 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3638 | break; |
c66ac9db | 3639 | default: |
6708bb27 | 3640 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 3641 | " action: 0x%02x\n", cdb[1] & 0x1f); |
de103c93 | 3642 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3643 | } |
3644 | ||
6bb35e00 CH |
3645 | if (!ret) |
3646 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3647 | return ret; |
c66ac9db NB |
3648 | } |
3649 | ||
3650 | /* | |
3651 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3652 | * | |
3653 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3654 | */ | |
de103c93 CH |
3655 | static sense_reason_t |
3656 | core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
c66ac9db | 3657 | { |
0fd97ccf | 3658 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3659 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3660 | unsigned char *buf; |
c66ac9db NB |
3661 | u32 add_len = 0, off = 8; |
3662 | ||
3663 | if (cmd->data_length < 8) { | |
6708bb27 | 3664 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3665 | " too small\n", cmd->data_length); |
de103c93 | 3666 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3667 | } |
3668 | ||
4949314c | 3669 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3670 | if (!buf) |
3671 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3672 | ||
0fd97ccf CH |
3673 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3674 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3675 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3676 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3677 | |
0fd97ccf CH |
3678 | spin_lock(&dev->t10_pr.registration_lock); |
3679 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
3680 | pr_reg_list) { |
3681 | /* | |
3682 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3683 | * next reservation key list descriptor. | |
3684 | */ | |
3685 | if ((add_len + 8) > (cmd->data_length - 8)) | |
3686 | break; | |
3687 | ||
3688 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3689 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3690 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3691 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3692 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3693 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3694 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3695 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3696 | ||
3697 | add_len += 8; | |
3698 | } | |
0fd97ccf | 3699 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db NB |
3700 | |
3701 | buf[4] = ((add_len >> 24) & 0xff); | |
3702 | buf[5] = ((add_len >> 16) & 0xff); | |
3703 | buf[6] = ((add_len >> 8) & 0xff); | |
3704 | buf[7] = (add_len & 0xff); | |
3705 | ||
4949314c | 3706 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3707 | |
c66ac9db NB |
3708 | return 0; |
3709 | } | |
3710 | ||
3711 | /* | |
3712 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3713 | * | |
3714 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3715 | */ | |
de103c93 CH |
3716 | static sense_reason_t |
3717 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
c66ac9db | 3718 | { |
0fd97ccf | 3719 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3720 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3721 | unsigned char *buf; |
c66ac9db NB |
3722 | u64 pr_res_key; |
3723 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ | |
3724 | ||
3725 | if (cmd->data_length < 8) { | |
6708bb27 | 3726 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 3727 | " too small\n", cmd->data_length); |
de103c93 | 3728 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3729 | } |
3730 | ||
4949314c | 3731 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3732 | if (!buf) |
3733 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3734 | ||
0fd97ccf CH |
3735 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3736 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3737 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3738 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3739 | |
0fd97ccf CH |
3740 | spin_lock(&dev->dev_reservation_lock); |
3741 | pr_reg = dev->dev_pr_res_holder; | |
ee1b1b9c | 3742 | if (pr_reg) { |
c66ac9db NB |
3743 | /* |
3744 | * Set the hardcoded Additional Length | |
3745 | */ | |
3746 | buf[4] = ((add_len >> 24) & 0xff); | |
3747 | buf[5] = ((add_len >> 16) & 0xff); | |
3748 | buf[6] = ((add_len >> 8) & 0xff); | |
3749 | buf[7] = (add_len & 0xff); | |
3750 | ||
05d1c7c0 AG |
3751 | if (cmd->data_length < 22) |
3752 | goto err; | |
3753 | ||
c66ac9db NB |
3754 | /* |
3755 | * Set the Reservation key. | |
3756 | * | |
3757 | * From spc4r17, section 5.7.10: | |
3758 | * A persistent reservation holder has its reservation key | |
3759 | * returned in the parameter data from a PERSISTENT | |
3760 | * RESERVE IN command with READ RESERVATION service action as | |
3761 | * follows: | |
3762 | * a) For a persistent reservation of the type Write Exclusive | |
3763 | * - All Registrants or Exclusive Access  All Regitrants, | |
3764 | * the reservation key shall be set to zero; or | |
3765 | * b) For all other persistent reservation types, the | |
3766 | * reservation key shall be set to the registered | |
3767 | * reservation key for the I_T nexus that holds the | |
3768 | * persistent reservation. | |
3769 | */ | |
3770 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3771 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3772 | pr_res_key = 0; | |
3773 | else | |
3774 | pr_res_key = pr_reg->pr_res_key; | |
3775 | ||
3776 | buf[8] = ((pr_res_key >> 56) & 0xff); | |
3777 | buf[9] = ((pr_res_key >> 48) & 0xff); | |
3778 | buf[10] = ((pr_res_key >> 40) & 0xff); | |
3779 | buf[11] = ((pr_res_key >> 32) & 0xff); | |
3780 | buf[12] = ((pr_res_key >> 24) & 0xff); | |
3781 | buf[13] = ((pr_res_key >> 16) & 0xff); | |
3782 | buf[14] = ((pr_res_key >> 8) & 0xff); | |
3783 | buf[15] = (pr_res_key & 0xff); | |
3784 | /* | |
3785 | * Set the SCOPE and TYPE | |
3786 | */ | |
3787 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3788 | (pr_reg->pr_res_type & 0x0f); | |
3789 | } | |
05d1c7c0 AG |
3790 | |
3791 | err: | |
0fd97ccf | 3792 | spin_unlock(&dev->dev_reservation_lock); |
4949314c | 3793 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3794 | |
3795 | return 0; | |
3796 | } | |
3797 | ||
3798 | /* | |
3799 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3800 | * | |
3801 | * See spc4r17 section 6.13.4 Table 165 | |
3802 | */ | |
de103c93 CH |
3803 | static sense_reason_t |
3804 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
c66ac9db | 3805 | { |
5951146d | 3806 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 3807 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3808 | unsigned char *buf; |
c66ac9db NB |
3809 | u16 add_len = 8; /* Hardcoded to 8. */ |
3810 | ||
3811 | if (cmd->data_length < 6) { | |
6708bb27 | 3812 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 3813 | " %u too small\n", cmd->data_length); |
de103c93 | 3814 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3815 | } |
3816 | ||
4949314c | 3817 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3818 | if (!buf) |
3819 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3820 | |
c435285d | 3821 | buf[0] = ((add_len >> 8) & 0xff); |
c66ac9db NB |
3822 | buf[1] = (add_len & 0xff); |
3823 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ | |
3824 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3825 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3826 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3827 | /* | |
3828 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3829 | * set the TMV: Task Mask Valid bit. | |
3830 | */ | |
3831 | buf[3] |= 0x80; | |
3832 | /* | |
3833 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3834 | */ | |
3835 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3836 | /* | |
3837 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3838 | */ | |
3839 | if (pr_tmpl->pr_aptpl_active) | |
3840 | buf[3] |= 0x01; | |
3841 | /* | |
3842 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3843 | */ | |
3844 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3845 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
3846 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
3847 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
3848 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
3849 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3850 | ||
4949314c | 3851 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3852 | |
c66ac9db NB |
3853 | return 0; |
3854 | } | |
3855 | ||
3856 | /* | |
3857 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
3858 | * | |
3859 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
3860 | */ | |
de103c93 CH |
3861 | static sense_reason_t |
3862 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
c66ac9db | 3863 | { |
0fd97ccf | 3864 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3865 | struct se_node_acl *se_nacl; |
c66ac9db NB |
3866 | struct se_portal_group *se_tpg; |
3867 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 3868 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3869 | unsigned char *buf; |
2650d71e | 3870 | u32 add_desc_len = 0, add_len = 0; |
c66ac9db | 3871 | u32 off = 8; /* off into first Full Status descriptor */ |
d16ca7c5 | 3872 | int format_code = 0, pr_res_type = 0, pr_res_scope = 0; |
2650d71e | 3873 | int exp_desc_len, desc_len; |
d16ca7c5 | 3874 | bool all_reg = false; |
c66ac9db NB |
3875 | |
3876 | if (cmd->data_length < 8) { | |
6708bb27 | 3877 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 3878 | " too small\n", cmd->data_length); |
de103c93 | 3879 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3880 | } |
3881 | ||
4949314c | 3882 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3883 | if (!buf) |
3884 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3885 | |
0fd97ccf CH |
3886 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
3887 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); | |
3888 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); | |
3889 | buf[3] = (dev->t10_pr.pr_generation & 0xff); | |
c66ac9db | 3890 | |
d16ca7c5 NB |
3891 | spin_lock(&dev->dev_reservation_lock); |
3892 | if (dev->dev_pr_res_holder) { | |
3893 | struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; | |
3894 | ||
3895 | if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
3896 | pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { | |
3897 | all_reg = true; | |
3898 | pr_res_type = pr_holder->pr_res_type; | |
3899 | pr_res_scope = pr_holder->pr_res_scope; | |
3900 | } | |
3901 | } | |
3902 | spin_unlock(&dev->dev_reservation_lock); | |
3903 | ||
c66ac9db NB |
3904 | spin_lock(&pr_tmpl->registration_lock); |
3905 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3906 | &pr_tmpl->registration_list, pr_reg_list) { | |
3907 | ||
3908 | se_nacl = pr_reg->pr_reg_nacl; | |
3909 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
3910 | add_desc_len = 0; | |
3911 | ||
33940d09 | 3912 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3913 | spin_unlock(&pr_tmpl->registration_lock); |
3914 | /* | |
3915 | * Determine expected length of $FABRIC_MOD specific | |
3916 | * TransportID full status descriptor.. | |
3917 | */ | |
2650d71e CH |
3918 | exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, |
3919 | &format_code); | |
3920 | if (exp_desc_len < 0 || | |
3921 | exp_desc_len + add_len > cmd->data_length) { | |
6708bb27 | 3922 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
3923 | " out of buffer: %d\n", cmd->data_length); |
3924 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 3925 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3926 | break; |
3927 | } | |
3928 | /* | |
3929 | * Set RESERVATION KEY | |
3930 | */ | |
3931 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); | |
3932 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); | |
3933 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); | |
3934 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); | |
3935 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); | |
3936 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); | |
3937 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); | |
3938 | buf[off++] = (pr_reg->pr_res_key & 0xff); | |
3939 | off += 4; /* Skip Over Reserved area */ | |
3940 | ||
3941 | /* | |
3942 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
3943 | */ | |
3944 | if (pr_reg->pr_reg_all_tg_pt) | |
3945 | buf[off] = 0x02; | |
3946 | /* | |
3947 | * The struct se_lun pointer will be present for the | |
3948 | * reservation holder for PR_HOLDER bit. | |
3949 | * | |
3950 | * Also, if this registration is the reservation | |
d16ca7c5 NB |
3951 | * holder or there is an All Registrants reservation |
3952 | * active, fill in SCOPE and TYPE in the next byte. | |
c66ac9db NB |
3953 | */ |
3954 | if (pr_reg->pr_res_holder) { | |
3955 | buf[off++] |= 0x01; | |
3956 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
3957 | (pr_reg->pr_res_type & 0x0f); | |
d16ca7c5 NB |
3958 | } else if (all_reg) { |
3959 | buf[off++] |= 0x01; | |
3960 | buf[off++] = (pr_res_scope & 0xf0) | | |
3961 | (pr_res_type & 0x0f); | |
3962 | } else { | |
c66ac9db | 3963 | off += 2; |
d16ca7c5 | 3964 | } |
c66ac9db NB |
3965 | |
3966 | off += 4; /* Skip over reserved area */ | |
3967 | /* | |
3968 | * From spc4r17 6.3.15: | |
3969 | * | |
3970 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
3971 | * IDENTIFIER field contains the relative port identifier (see | |
3972 | * 3.1.120) of the target port that is part of the I_T nexus | |
3973 | * described by this full status descriptor. If the ALL_TG_PT | |
3974 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
3975 | * IDENTIFIER field are not defined by this standard. | |
3976 | */ | |
6708bb27 | 3977 | if (!pr_reg->pr_reg_all_tg_pt) { |
c66ac9db NB |
3978 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
3979 | ||
3980 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
3981 | buf[off++] = (port->sep_rtpi & 0xff); | |
3982 | } else | |
35d1efe8 | 3983 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
c66ac9db | 3984 | |
2650d71e CH |
3985 | buf[off+4] = se_tpg->proto_id; |
3986 | ||
c66ac9db | 3987 | /* |
2650d71e | 3988 | * Now, have the $FABRIC_MOD fill in the transport ID. |
c66ac9db | 3989 | */ |
2650d71e CH |
3990 | desc_len = target_get_pr_transport_id(se_nacl, pr_reg, |
3991 | &format_code, &buf[off+4]); | |
c66ac9db NB |
3992 | |
3993 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 3994 | atomic_dec_mb(&pr_reg->pr_res_holders); |
2650d71e CH |
3995 | |
3996 | if (desc_len < 0) | |
3997 | break; | |
c66ac9db NB |
3998 | /* |
3999 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4000 | */ | |
4001 | buf[off++] = ((desc_len >> 24) & 0xff); | |
4002 | buf[off++] = ((desc_len >> 16) & 0xff); | |
4003 | buf[off++] = ((desc_len >> 8) & 0xff); | |
4004 | buf[off++] = (desc_len & 0xff); | |
4005 | /* | |
4006 | * Size of full desctipor header minus TransportID | |
4007 | * containing $FABRIC_MOD specific) initiator device/port | |
4008 | * WWN information. | |
4009 | * | |
4010 | * See spc4r17 Section 6.13.5 Table 169 | |
4011 | */ | |
4012 | add_desc_len = (24 + desc_len); | |
4013 | ||
4014 | off += desc_len; | |
4015 | add_len += add_desc_len; | |
4016 | } | |
4017 | spin_unlock(&pr_tmpl->registration_lock); | |
4018 | /* | |
4019 | * Set ADDITIONAL_LENGTH | |
4020 | */ | |
4021 | buf[4] = ((add_len >> 24) & 0xff); | |
4022 | buf[5] = ((add_len >> 16) & 0xff); | |
4023 | buf[6] = ((add_len >> 8) & 0xff); | |
4024 | buf[7] = (add_len & 0xff); | |
4025 | ||
4949314c | 4026 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4027 | |
c66ac9db NB |
4028 | return 0; |
4029 | } | |
4030 | ||
de103c93 CH |
4031 | sense_reason_t |
4032 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) | |
c66ac9db | 4033 | { |
de103c93 | 4034 | sense_reason_t ret; |
e76a35d6 | 4035 | |
c66ac9db NB |
4036 | /* |
4037 | * Following spc2r20 5.5.1 Reservations overview: | |
4038 | * | |
4039 | * If a logical unit has been reserved by any RESERVE command and is | |
4040 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4041 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4042 | * initiator or service action and shall terminate with a RESERVATION | |
4043 | * CONFLICT status. | |
4044 | */ | |
0fd97ccf | 4045 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
6708bb27 | 4046 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4047 | " SPC-2 reservation is held, returning" |
4048 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 4049 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
4050 | } |
4051 | ||
617c0e06 CH |
4052 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4053 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4054 | ret = core_scsi3_pri_read_keys(cmd); |
4055 | break; | |
617c0e06 | 4056 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4057 | ret = core_scsi3_pri_read_reservation(cmd); |
4058 | break; | |
617c0e06 | 4059 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4060 | ret = core_scsi3_pri_report_capabilities(cmd); |
4061 | break; | |
617c0e06 | 4062 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4063 | ret = core_scsi3_pri_read_full_status(cmd); |
4064 | break; | |
617c0e06 CH |
4065 | default: |
4066 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4067 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
de103c93 | 4068 | return TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
4069 | } |
4070 | ||
6bb35e00 CH |
4071 | if (!ret) |
4072 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4073 | return ret; |
c66ac9db NB |
4074 | } |
4075 | ||
de103c93 CH |
4076 | sense_reason_t |
4077 | target_check_reservation(struct se_cmd *cmd) | |
c66ac9db | 4078 | { |
d977f437 | 4079 | struct se_device *dev = cmd->se_dev; |
de103c93 | 4080 | sense_reason_t ret; |
c66ac9db | 4081 | |
d977f437 CH |
4082 | if (!cmd->se_sess) |
4083 | return 0; | |
4084 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
4085 | return 0; | |
a3541703 | 4086 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
d977f437 | 4087 | return 0; |
c66ac9db | 4088 | |
d977f437 CH |
4089 | spin_lock(&dev->dev_reservation_lock); |
4090 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) | |
4091 | ret = target_scsi2_reservation_check(cmd); | |
4092 | else | |
4093 | ret = target_scsi3_pr_reservation_check(cmd); | |
4094 | spin_unlock(&dev->dev_reservation_lock); | |
0fd97ccf | 4095 | |
d977f437 | 4096 | return ret; |
c66ac9db | 4097 | } |