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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c66ac9db NB |
2 | /******************************************************************************* |
3 | * Filename: target_core_pr.c | |
4 | * | |
5 | * This file contains SPC-3 compliant persistent reservations and | |
6 | * legacy SPC-2 reservations with compatible reservation handling (CRH=1) | |
7 | * | |
4c76251e | 8 | * (c) Copyright 2009-2013 Datera, Inc. |
c66ac9db NB |
9 | * |
10 | * Nicholas A. Bellinger <nab@kernel.org> | |
11 | * | |
c66ac9db NB |
12 | ******************************************************************************/ |
13 | ||
c66ac9db NB |
14 | #include <linux/slab.h> |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/list.h> | |
5538d294 | 17 | #include <linux/vmalloc.h> |
0e9b10a9 | 18 | #include <linux/file.h> |
8dcf07be BVA |
19 | #include <linux/fcntl.h> |
20 | #include <linux/fs.h> | |
ba929992 | 21 | #include <scsi/scsi_proto.h> |
c66ac9db NB |
22 | #include <asm/unaligned.h> |
23 | ||
24 | #include <target/target_core_base.h> | |
c4795fb2 CH |
25 | #include <target/target_core_backend.h> |
26 | #include <target/target_core_fabric.h> | |
c66ac9db | 27 | |
e26d99ae | 28 | #include "target_core_internal.h" |
c66ac9db NB |
29 | #include "target_core_pr.h" |
30 | #include "target_core_ua.h" | |
31 | ||
32 | /* | |
33 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) | |
34 | */ | |
35 | struct pr_transport_id_holder { | |
c66ac9db NB |
36 | struct t10_pr_registration *dest_pr_reg; |
37 | struct se_portal_group *dest_tpg; | |
38 | struct se_node_acl *dest_node_acl; | |
39 | struct se_dev_entry *dest_se_deve; | |
40 | struct list_head dest_list; | |
41 | }; | |
42 | ||
d2843c17 | 43 | void core_pr_dump_initiator_port( |
c66ac9db NB |
44 | struct t10_pr_registration *pr_reg, |
45 | char *buf, | |
46 | u32 size) | |
47 | { | |
24528f08 | 48 | if (!pr_reg->isid_present_at_reg) { |
d2843c17 | 49 | buf[0] = '\0'; |
24528f08 | 50 | return; |
51 | } | |
c66ac9db | 52 | |
d2843c17 | 53 | snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); |
c66ac9db NB |
54 | } |
55 | ||
33ce6a87 AG |
56 | enum register_type { |
57 | REGISTER, | |
58 | REGISTER_AND_IGNORE_EXISTING_KEY, | |
59 | REGISTER_AND_MOVE, | |
60 | }; | |
61 | ||
62 | enum preempt_type { | |
63 | PREEMPT, | |
64 | PREEMPT_AND_ABORT, | |
65 | }; | |
66 | ||
c66ac9db | 67 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, |
6c3c9baa | 68 | struct t10_pr_registration *, int, int); |
c66ac9db | 69 | |
e673dc92 IT |
70 | static int is_reservation_holder( |
71 | struct t10_pr_registration *pr_res_holder, | |
72 | struct t10_pr_registration *pr_reg) | |
73 | { | |
74 | int pr_res_type; | |
75 | ||
76 | if (pr_res_holder) { | |
77 | pr_res_type = pr_res_holder->pr_res_type; | |
78 | ||
79 | return pr_res_holder == pr_reg || | |
80 | pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
81 | pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG; | |
82 | } | |
83 | return 0; | |
84 | } | |
85 | ||
de103c93 CH |
86 | static sense_reason_t |
87 | target_scsi2_reservation_check(struct se_cmd *cmd) | |
c66ac9db | 88 | { |
d977f437 CH |
89 | struct se_device *dev = cmd->se_dev; |
90 | struct se_session *sess = cmd->se_sess; | |
91 | ||
92 | switch (cmd->t_task_cdb[0]) { | |
c66ac9db NB |
93 | case INQUIRY: |
94 | case RELEASE: | |
95 | case RELEASE_10: | |
96 | return 0; | |
97 | default: | |
d977f437 | 98 | break; |
c66ac9db NB |
99 | } |
100 | ||
fae43461 | 101 | if (!dev->reservation_holder || !sess) |
c66ac9db NB |
102 | return 0; |
103 | ||
fae43461 | 104 | if (dev->reservation_holder->se_node_acl != sess->se_node_acl) |
de103c93 | 105 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
106 | |
107 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
108 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) | |
de103c93 | 109 | return TCM_RESERVATION_CONFLICT; |
c66ac9db | 110 | } |
c66ac9db | 111 | |
d977f437 | 112 | return 0; |
c66ac9db NB |
113 | } |
114 | ||
eacac00c CH |
115 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
116 | struct se_node_acl *, struct se_session *); | |
117 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); | |
118 | ||
087a03b3 | 119 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
eacac00c CH |
120 | { |
121 | struct se_session *se_sess = cmd->se_sess; | |
0fd97ccf | 122 | struct se_device *dev = cmd->se_dev; |
eacac00c | 123 | struct t10_pr_registration *pr_reg; |
0fd97ccf | 124 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
eacac00c CH |
125 | int conflict = 0; |
126 | ||
eacac00c CH |
127 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
128 | se_sess); | |
129 | if (pr_reg) { | |
130 | /* | |
131 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE | |
132 | * behavior | |
133 | * | |
134 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD | |
135 | * status, but no reservation shall be established and the | |
136 | * persistent reservation shall not be changed, if the command | |
137 | * is received from a) and b) below. | |
138 | * | |
139 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD | |
140 | * status, but the persistent reservation shall not be released, | |
141 | * if the command is received from a) and b) | |
142 | * | |
143 | * a) An I_T nexus that is a persistent reservation holder; or | |
144 | * b) An I_T nexus that is registered if a registrants only or | |
145 | * all registrants type persistent reservation is present. | |
146 | * | |
147 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, | |
148 | * RELEASE(6) command, or RELEASE(10) command shall be processed | |
149 | * as defined in SPC-2. | |
150 | */ | |
151 | if (pr_reg->pr_res_holder) { | |
152 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 153 | return 1; |
eacac00c CH |
154 | } |
155 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || | |
156 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || | |
157 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
158 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
159 | core_scsi3_put_pr_reg(pr_reg); | |
087a03b3 | 160 | return 1; |
eacac00c CH |
161 | } |
162 | core_scsi3_put_pr_reg(pr_reg); | |
163 | conflict = 1; | |
164 | } else { | |
165 | /* | |
166 | * Following spc2r20 5.5.1 Reservations overview: | |
167 | * | |
168 | * If a logical unit has executed a PERSISTENT RESERVE OUT | |
169 | * command with the REGISTER or the REGISTER AND IGNORE | |
170 | * EXISTING KEY service action and is still registered by any | |
171 | * initiator, all RESERVE commands and all RELEASE commands | |
172 | * regardless of initiator shall conflict and shall terminate | |
173 | * with a RESERVATION CONFLICT status. | |
174 | */ | |
175 | spin_lock(&pr_tmpl->registration_lock); | |
176 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; | |
177 | spin_unlock(&pr_tmpl->registration_lock); | |
178 | } | |
179 | ||
180 | if (conflict) { | |
181 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" | |
182 | " while active SPC-3 registrations exist," | |
183 | " returning RESERVATION_CONFLICT\n"); | |
087a03b3 | 184 | return -EBUSY; |
eacac00c CH |
185 | } |
186 | ||
087a03b3 | 187 | return 0; |
eacac00c CH |
188 | } |
189 | ||
fae43461 BVA |
190 | void target_release_reservation(struct se_device *dev) |
191 | { | |
192 | dev->reservation_holder = NULL; | |
193 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; | |
194 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { | |
195 | dev->dev_res_bin_isid = 0; | |
196 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; | |
197 | } | |
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); | |
fae43461 | 217 | if (!dev->reservation_holder || !sess) |
d29a5b6a CH |
218 | goto out_unlock; |
219 | ||
fae43461 | 220 | if (dev->reservation_holder->se_node_acl != sess->se_node_acl) |
d29a5b6a | 221 | goto out_unlock; |
c66ac9db | 222 | |
edc318d9 BK |
223 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
224 | goto out_unlock; | |
225 | ||
fae43461 | 226 | target_release_reservation(dev); |
609234e3 | 227 | tpg = sess->se_tpg; |
f2d30680 HR |
228 | pr_debug("SCSI-2 Released reservation for %s LUN: %llu ->" |
229 | " MAPPED LUN: %llu for %s\n", | |
30c7ca93 | 230 | tpg->se_tpg_tfo->fabric_name, |
29a05dee | 231 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 232 | sess->se_node_acl->initiatorname); |
c66ac9db | 233 | |
d29a5b6a CH |
234 | out_unlock: |
235 | spin_unlock(&dev->dev_reservation_lock); | |
236 | out: | |
de103c93 CH |
237 | target_complete_cmd(cmd, GOOD); |
238 | return 0; | |
c66ac9db NB |
239 | } |
240 | ||
de103c93 CH |
241 | sense_reason_t |
242 | target_scsi2_reservation_reserve(struct se_cmd *cmd) | |
c66ac9db NB |
243 | { |
244 | struct se_device *dev = cmd->se_dev; | |
245 | struct se_session *sess = cmd->se_sess; | |
609234e3 | 246 | struct se_portal_group *tpg; |
de103c93 CH |
247 | sense_reason_t ret = 0; |
248 | int rc; | |
c66ac9db | 249 | |
a1d8b49a AG |
250 | if ((cmd->t_task_cdb[1] & 0x01) && |
251 | (cmd->t_task_cdb[1] & 0x02)) { | |
a3960ced | 252 | pr_err("LongIO and Obsolete Bits set, returning ILLEGAL_REQUEST\n"); |
de103c93 | 253 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
c66ac9db NB |
254 | } |
255 | /* | |
256 | * This is currently the case for target_core_mod passthrough struct se_cmd | |
257 | * ops | |
258 | */ | |
609234e3 | 259 | if (!sess || !sess->se_tpg) |
d29a5b6a | 260 | goto out; |
087a03b3 NB |
261 | rc = target_check_scsi2_reservation_conflict(cmd); |
262 | if (rc == 1) | |
d29a5b6a | 263 | goto out; |
c66ac9db | 264 | |
de103c93 CH |
265 | if (rc < 0) |
266 | return TCM_RESERVATION_CONFLICT; | |
267 | ||
609234e3 | 268 | tpg = sess->se_tpg; |
c66ac9db | 269 | spin_lock(&dev->dev_reservation_lock); |
fae43461 BVA |
270 | if (dev->reservation_holder && |
271 | dev->reservation_holder->se_node_acl != sess->se_node_acl) { | |
6708bb27 | 272 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
30c7ca93 | 273 | tpg->se_tpg_tfo->fabric_name); |
f2d30680 | 274 | pr_err("Original reserver LUN: %llu %s\n", |
e3d6f909 | 275 | cmd->se_lun->unpacked_lun, |
fae43461 | 276 | dev->reservation_holder->se_node_acl->initiatorname); |
f2d30680 | 277 | pr_err("Current attempt - LUN: %llu -> MAPPED LUN: %llu" |
e3d6f909 | 278 | " from %s \n", cmd->se_lun->unpacked_lun, |
29a05dee | 279 | cmd->orig_fe_lun, |
c66ac9db | 280 | sess->se_node_acl->initiatorname); |
de103c93 | 281 | ret = TCM_RESERVATION_CONFLICT; |
d29a5b6a | 282 | goto out_unlock; |
c66ac9db NB |
283 | } |
284 | ||
fae43461 | 285 | dev->reservation_holder = sess; |
0fd97ccf | 286 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; |
c66ac9db NB |
287 | if (sess->sess_bin_isid != 0) { |
288 | dev->dev_res_bin_isid = sess->sess_bin_isid; | |
0fd97ccf | 289 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; |
c66ac9db | 290 | } |
f2d30680 | 291 | pr_debug("SCSI-2 Reserved %s LUN: %llu -> MAPPED LUN: %llu" |
30c7ca93 | 292 | " for %s\n", tpg->se_tpg_tfo->fabric_name, |
29a05dee | 293 | cmd->se_lun->unpacked_lun, cmd->orig_fe_lun, |
c66ac9db | 294 | sess->se_node_acl->initiatorname); |
c66ac9db | 295 | |
d29a5b6a CH |
296 | out_unlock: |
297 | spin_unlock(&dev->dev_reservation_lock); | |
298 | out: | |
6bb35e00 CH |
299 | if (!ret) |
300 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 301 | return ret; |
c66ac9db NB |
302 | } |
303 | ||
c66ac9db NB |
304 | |
305 | /* | |
306 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support | |
307 | * | |
308 | * This function is called by those initiator ports who are *NOT* | |
309 | * the active PR reservation holder when a reservation is present. | |
310 | */ | |
9fcb57f3 CH |
311 | static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type, |
312 | bool isid_mismatch) | |
c66ac9db | 313 | { |
d977f437 | 314 | unsigned char *cdb = cmd->t_task_cdb; |
e3d6f909 | 315 | struct se_session *se_sess = cmd->se_sess; |
29a05dee | 316 | struct se_node_acl *nacl = se_sess->se_node_acl; |
9fcb57f3 | 317 | int other_cdb = 0; |
c66ac9db NB |
318 | int registered_nexus = 0, ret = 1; /* Conflict by default */ |
319 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ | |
320 | int we = 0; /* Write Exclusive */ | |
321 | int legacy = 0; /* Act like a legacy device and return | |
322 | * RESERVATION CONFLICT on some CDBs */ | |
c66ac9db | 323 | |
9fcb57f3 CH |
324 | if (isid_mismatch) { |
325 | registered_nexus = 0; | |
326 | } else { | |
327 | struct se_dev_entry *se_deve; | |
328 | ||
329 | rcu_read_lock(); | |
330 | se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); | |
331 | if (se_deve) | |
332 | registered_nexus = test_bit(DEF_PR_REG_ACTIVE, | |
333 | &se_deve->deve_flags); | |
334 | rcu_read_unlock(); | |
335 | } | |
c66ac9db NB |
336 | |
337 | switch (pr_reg_type) { | |
338 | case PR_TYPE_WRITE_EXCLUSIVE: | |
339 | we = 1; | |
340 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
341 | /* | |
342 | * Some commands are only allowed for the persistent reservation | |
343 | * holder. | |
344 | */ | |
c66ac9db NB |
345 | break; |
346 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
347 | we = 1; | |
d7e595dd | 348 | /* fall through */ |
c66ac9db NB |
349 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: |
350 | /* | |
351 | * Some commands are only allowed for registered I_T Nexuses. | |
352 | */ | |
353 | reg_only = 1; | |
c66ac9db NB |
354 | break; |
355 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
356 | we = 1; | |
d7e595dd | 357 | /* fall through */ |
c66ac9db NB |
358 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: |
359 | /* | |
360 | * Each registered I_T Nexus is a reservation holder. | |
361 | */ | |
362 | all_reg = 1; | |
c66ac9db NB |
363 | break; |
364 | default: | |
e3d6f909 | 365 | return -EINVAL; |
c66ac9db NB |
366 | } |
367 | /* | |
368 | * Referenced from spc4r17 table 45 for *NON* PR holder access | |
369 | */ | |
370 | switch (cdb[0]) { | |
371 | case SECURITY_PROTOCOL_IN: | |
372 | if (registered_nexus) | |
373 | return 0; | |
374 | ret = (we) ? 0 : 1; | |
375 | break; | |
376 | case MODE_SENSE: | |
377 | case MODE_SENSE_10: | |
378 | case READ_ATTRIBUTE: | |
379 | case READ_BUFFER: | |
380 | case RECEIVE_DIAGNOSTIC: | |
381 | if (legacy) { | |
382 | ret = 1; | |
383 | break; | |
384 | } | |
385 | if (registered_nexus) { | |
386 | ret = 0; | |
387 | break; | |
388 | } | |
389 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
390 | break; | |
391 | case PERSISTENT_RESERVE_OUT: | |
392 | /* | |
393 | * This follows PERSISTENT_RESERVE_OUT service actions that | |
394 | * are allowed in the presence of various reservations. | |
395 | * See spc4r17, table 46 | |
396 | */ | |
397 | switch (cdb[1] & 0x1f) { | |
398 | case PRO_CLEAR: | |
399 | case PRO_PREEMPT: | |
400 | case PRO_PREEMPT_AND_ABORT: | |
401 | ret = (registered_nexus) ? 0 : 1; | |
402 | break; | |
403 | case PRO_REGISTER: | |
404 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: | |
405 | ret = 0; | |
406 | break; | |
407 | case PRO_REGISTER_AND_MOVE: | |
408 | case PRO_RESERVE: | |
409 | ret = 1; | |
410 | break; | |
411 | case PRO_RELEASE: | |
412 | ret = (registered_nexus) ? 0 : 1; | |
413 | break; | |
414 | default: | |
6708bb27 | 415 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
c66ac9db | 416 | " action: 0x%02x\n", cdb[1] & 0x1f); |
e3d6f909 | 417 | return -EINVAL; |
c66ac9db NB |
418 | } |
419 | break; | |
420 | case RELEASE: | |
421 | case RELEASE_10: | |
eacac00c | 422 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
c66ac9db NB |
423 | ret = 0; |
424 | break; | |
425 | case RESERVE: | |
426 | case RESERVE_10: | |
eacac00c | 427 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
c66ac9db NB |
428 | ret = 0; |
429 | break; | |
430 | case TEST_UNIT_READY: | |
431 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ | |
432 | break; | |
433 | case MAINTENANCE_IN: | |
434 | switch (cdb[1] & 0x1f) { | |
435 | case MI_MANAGEMENT_PROTOCOL_IN: | |
436 | if (registered_nexus) { | |
437 | ret = 0; | |
438 | break; | |
439 | } | |
440 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
441 | break; | |
442 | case MI_REPORT_SUPPORTED_OPERATION_CODES: | |
443 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: | |
444 | if (legacy) { | |
445 | ret = 1; | |
446 | break; | |
447 | } | |
448 | if (registered_nexus) { | |
449 | ret = 0; | |
450 | break; | |
451 | } | |
452 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ | |
453 | break; | |
454 | case MI_REPORT_ALIASES: | |
455 | case MI_REPORT_IDENTIFYING_INFORMATION: | |
456 | case MI_REPORT_PRIORITY: | |
457 | case MI_REPORT_TARGET_PGS: | |
458 | case MI_REPORT_TIMESTAMP: | |
459 | ret = 0; /* Allowed */ | |
460 | break; | |
461 | default: | |
6708bb27 | 462 | pr_err("Unknown MI Service Action: 0x%02x\n", |
c66ac9db | 463 | (cdb[1] & 0x1f)); |
e3d6f909 | 464 | return -EINVAL; |
c66ac9db NB |
465 | } |
466 | break; | |
467 | case ACCESS_CONTROL_IN: | |
468 | case ACCESS_CONTROL_OUT: | |
469 | case INQUIRY: | |
470 | case LOG_SENSE: | |
85686f69 | 471 | case SERVICE_ACTION_IN_12: |
c66ac9db NB |
472 | case REPORT_LUNS: |
473 | case REQUEST_SENSE: | |
6816966a | 474 | case PERSISTENT_RESERVE_IN: |
c66ac9db NB |
475 | ret = 0; /*/ Allowed CDBs */ |
476 | break; | |
477 | default: | |
478 | other_cdb = 1; | |
479 | break; | |
480 | } | |
481 | /* | |
25985edc | 482 | * Case where the CDB is explicitly allowed in the above switch |
c66ac9db NB |
483 | * statement. |
484 | */ | |
6708bb27 | 485 | if (!ret && !other_cdb) { |
125d0119 | 486 | pr_debug("Allowing explicit CDB: 0x%02x for %s" |
c66ac9db NB |
487 | " reservation holder\n", cdb[0], |
488 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 489 | |
c66ac9db NB |
490 | return ret; |
491 | } | |
492 | /* | |
493 | * Check if write exclusive initiator ports *NOT* holding the | |
494 | * WRITE_EXCLUSIVE_* reservation. | |
495 | */ | |
ee1b1b9c | 496 | if (we && !registered_nexus) { |
c66ac9db NB |
497 | if (cmd->data_direction == DMA_TO_DEVICE) { |
498 | /* | |
499 | * Conflict for write exclusive | |
500 | */ | |
6708bb27 | 501 | pr_debug("%s Conflict for unregistered nexus" |
c66ac9db NB |
502 | " %s CDB: 0x%02x to %s reservation\n", |
503 | transport_dump_cmd_direction(cmd), | |
504 | se_sess->se_node_acl->initiatorname, cdb[0], | |
505 | core_scsi3_pr_dump_type(pr_reg_type)); | |
506 | return 1; | |
507 | } else { | |
508 | /* | |
509 | * Allow non WRITE CDBs for all Write Exclusive | |
510 | * PR TYPEs to pass for registered and | |
511 | * non-registered_nexuxes NOT holding the reservation. | |
512 | * | |
513 | * We only make noise for the unregisterd nexuses, | |
514 | * as we expect registered non-reservation holding | |
515 | * nexuses to issue CDBs. | |
516 | */ | |
8b1e1244 | 517 | |
6708bb27 | 518 | if (!registered_nexus) { |
125d0119 | 519 | pr_debug("Allowing implicit CDB: 0x%02x" |
c66ac9db NB |
520 | " for %s reservation on unregistered" |
521 | " nexus\n", cdb[0], | |
522 | core_scsi3_pr_dump_type(pr_reg_type)); | |
523 | } | |
8b1e1244 | 524 | |
c66ac9db NB |
525 | return 0; |
526 | } | |
527 | } else if ((reg_only) || (all_reg)) { | |
528 | if (registered_nexus) { | |
529 | /* | |
530 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, | |
531 | * allow commands from registered nexuses. | |
532 | */ | |
8b1e1244 | 533 | |
125d0119 | 534 | pr_debug("Allowing implicit CDB: 0x%02x for %s" |
c66ac9db NB |
535 | " reservation\n", cdb[0], |
536 | core_scsi3_pr_dump_type(pr_reg_type)); | |
8b1e1244 | 537 | |
c66ac9db NB |
538 | return 0; |
539 | } | |
1ecc7586 LD |
540 | } else if (we && registered_nexus) { |
541 | /* | |
542 | * Reads are allowed for Write Exclusive locks | |
543 | * from all registrants. | |
544 | */ | |
545 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
546 | pr_debug("Allowing READ CDB: 0x%02x for %s" | |
547 | " reservation\n", cdb[0], | |
548 | core_scsi3_pr_dump_type(pr_reg_type)); | |
549 | ||
550 | return 0; | |
551 | } | |
c66ac9db | 552 | } |
6708bb27 | 553 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
c66ac9db NB |
554 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
555 | (registered_nexus) ? "" : "un", | |
556 | se_sess->se_node_acl->initiatorname, cdb[0], | |
557 | core_scsi3_pr_dump_type(pr_reg_type)); | |
558 | ||
559 | return 1; /* Conflict by default */ | |
560 | } | |
561 | ||
de103c93 CH |
562 | static sense_reason_t |
563 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) | |
d977f437 CH |
564 | { |
565 | struct se_device *dev = cmd->se_dev; | |
566 | struct se_session *sess = cmd->se_sess; | |
567 | u32 pr_reg_type; | |
9fcb57f3 | 568 | bool isid_mismatch = false; |
d977f437 CH |
569 | |
570 | if (!dev->dev_pr_res_holder) | |
571 | return 0; | |
572 | ||
573 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; | |
574 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; | |
575 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) | |
576 | goto check_nonholder; | |
577 | ||
578 | if (dev->dev_pr_res_holder->isid_present_at_reg) { | |
579 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != | |
580 | sess->sess_bin_isid) { | |
9fcb57f3 | 581 | isid_mismatch = true; |
d977f437 CH |
582 | goto check_nonholder; |
583 | } | |
584 | } | |
585 | ||
586 | return 0; | |
587 | ||
588 | check_nonholder: | |
9fcb57f3 | 589 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch)) |
de103c93 | 590 | return TCM_RESERVATION_CONFLICT; |
d977f437 CH |
591 | return 0; |
592 | } | |
593 | ||
c66ac9db NB |
594 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
595 | { | |
c66ac9db | 596 | u32 prg; |
0fd97ccf | 597 | |
c66ac9db NB |
598 | /* |
599 | * PRGeneration field shall contain the value of a 32-bit wrapping | |
600 | * counter mainted by the device server. | |
601 | * | |
602 | * Note that this is done regardless of Active Persist across | |
603 | * Target PowerLoss (APTPL) | |
604 | * | |
605 | * See spc4r17 section 6.3.12 READ_KEYS service action | |
606 | */ | |
607 | spin_lock(&dev->dev_reservation_lock); | |
0fd97ccf | 608 | prg = dev->t10_pr.pr_generation++; |
c66ac9db NB |
609 | spin_unlock(&dev->dev_reservation_lock); |
610 | ||
611 | return prg; | |
612 | } | |
613 | ||
c66ac9db NB |
614 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
615 | struct se_device *dev, | |
616 | struct se_node_acl *nacl, | |
79dc9c9e | 617 | struct se_lun *lun, |
3ccd6e83 | 618 | struct se_dev_entry *dest_deve, |
f2d30680 | 619 | u64 mapped_lun, |
c66ac9db NB |
620 | unsigned char *isid, |
621 | u64 sa_res_key, | |
622 | int all_tg_pt, | |
623 | int aptpl) | |
624 | { | |
c66ac9db NB |
625 | struct t10_pr_registration *pr_reg; |
626 | ||
627 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); | |
6708bb27 AG |
628 | if (!pr_reg) { |
629 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
c66ac9db NB |
630 | return NULL; |
631 | } | |
632 | ||
c66ac9db NB |
633 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); |
634 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
635 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
636 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
637 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
638 | atomic_set(&pr_reg->pr_res_holders, 0); | |
639 | pr_reg->pr_reg_nacl = nacl; | |
3ccd6e83 NB |
640 | /* |
641 | * For destination registrations for ALL_TG_PT=1 and SPEC_I_PT=1, | |
642 | * the se_dev_entry->pr_ref will have been already obtained by | |
643 | * core_get_se_deve_from_rtpi() or __core_scsi3_alloc_registration(). | |
644 | * | |
645 | * Otherwise, locate se_dev_entry now and obtain a reference until | |
646 | * registration completes in __core_scsi3_add_registration(). | |
647 | */ | |
648 | if (dest_deve) { | |
649 | pr_reg->pr_reg_deve = dest_deve; | |
650 | } else { | |
651 | rcu_read_lock(); | |
652 | pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); | |
653 | if (!pr_reg->pr_reg_deve) { | |
654 | rcu_read_unlock(); | |
655 | pr_err("Unable to locate PR deve %s mapped_lun: %llu\n", | |
656 | nacl->initiatorname, mapped_lun); | |
657 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
658 | return NULL; | |
659 | } | |
660 | kref_get(&pr_reg->pr_reg_deve->pr_kref); | |
661 | rcu_read_unlock(); | |
662 | } | |
79dc9c9e NB |
663 | pr_reg->pr_res_mapped_lun = mapped_lun; |
664 | pr_reg->pr_aptpl_target_lun = lun->unpacked_lun; | |
adf653f9 | 665 | pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; |
c66ac9db NB |
666 | pr_reg->pr_res_key = sa_res_key; |
667 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
668 | pr_reg->pr_reg_aptpl = aptpl; | |
c66ac9db NB |
669 | /* |
670 | * If an ISID value for this SCSI Initiator Port exists, | |
671 | * save it to the registration now. | |
672 | */ | |
673 | if (isid != NULL) { | |
674 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
675 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
676 | pr_reg->isid_present_at_reg = 1; | |
677 | } | |
678 | ||
679 | return pr_reg; | |
680 | } | |
681 | ||
682 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); | |
683 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); | |
684 | ||
685 | /* | |
686 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 | |
687 | * modes. | |
688 | */ | |
689 | static struct t10_pr_registration *__core_scsi3_alloc_registration( | |
690 | struct se_device *dev, | |
691 | struct se_node_acl *nacl, | |
79dc9c9e | 692 | struct se_lun *lun, |
c66ac9db | 693 | struct se_dev_entry *deve, |
f2d30680 | 694 | u64 mapped_lun, |
c66ac9db NB |
695 | unsigned char *isid, |
696 | u64 sa_res_key, | |
697 | int all_tg_pt, | |
698 | int aptpl) | |
699 | { | |
700 | struct se_dev_entry *deve_tmp; | |
701 | struct se_node_acl *nacl_tmp; | |
79dc9c9e | 702 | struct se_lun_acl *lacl_tmp; |
adf653f9 | 703 | struct se_lun *lun_tmp, *next, *dest_lun; |
9ac8928e | 704 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db NB |
705 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; |
706 | int ret; | |
707 | /* | |
708 | * Create a registration for the I_T Nexus upon which the | |
709 | * PROUT REGISTER was received. | |
710 | */ | |
79dc9c9e NB |
711 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
712 | isid, sa_res_key, all_tg_pt, | |
713 | aptpl); | |
6708bb27 | 714 | if (!pr_reg) |
c66ac9db NB |
715 | return NULL; |
716 | /* | |
717 | * Return pointer to pr_reg for ALL_TG_PT=0 | |
718 | */ | |
6708bb27 | 719 | if (!all_tg_pt) |
c66ac9db NB |
720 | return pr_reg; |
721 | /* | |
722 | * Create list of matching SCSI Initiator Port registrations | |
723 | * for ALL_TG_PT=1 | |
724 | */ | |
725 | spin_lock(&dev->se_port_lock); | |
adf653f9 | 726 | list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) { |
9e37d042 NB |
727 | if (!percpu_ref_tryget_live(&lun_tmp->lun_ref)) |
728 | continue; | |
c66ac9db NB |
729 | spin_unlock(&dev->se_port_lock); |
730 | ||
1adff1b3 | 731 | spin_lock(&lun_tmp->lun_deve_lock); |
adf653f9 | 732 | list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) { |
c66ac9db NB |
733 | /* |
734 | * This pointer will be NULL for demo mode MappedLUNs | |
125d0119 | 735 | * that have not been make explicit via a ConfigFS |
c66ac9db NB |
736 | * MappedLUN group for the SCSI Initiator Node ACL. |
737 | */ | |
6708bb27 | 738 | if (!deve_tmp->se_lun_acl) |
c66ac9db NB |
739 | continue; |
740 | ||
79dc9c9e | 741 | lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl, |
adf653f9 | 742 | lockdep_is_held(&lun_tmp->lun_deve_lock)); |
79dc9c9e | 743 | nacl_tmp = lacl_tmp->se_lun_nacl; |
c66ac9db NB |
744 | /* |
745 | * Skip the matching struct se_node_acl that is allocated | |
746 | * above.. | |
747 | */ | |
748 | if (nacl == nacl_tmp) | |
749 | continue; | |
750 | /* | |
751 | * Only perform PR registrations for target ports on | |
752 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 | |
753 | * arrived. | |
754 | */ | |
755 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) | |
756 | continue; | |
757 | /* | |
758 | * Look for a matching Initiator Node ACL in ASCII format | |
759 | */ | |
760 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) | |
761 | continue; | |
762 | ||
29a05dee | 763 | kref_get(&deve_tmp->pr_kref); |
1adff1b3 | 764 | spin_unlock(&lun_tmp->lun_deve_lock); |
c66ac9db NB |
765 | /* |
766 | * Grab a configfs group dependency that is released | |
767 | * for the exception path at label out: below, or upon | |
768 | * completion of adding ALL_TG_PT=1 registrations in | |
769 | * __core_scsi3_add_registration() | |
770 | */ | |
771 | ret = core_scsi3_lunacl_depend_item(deve_tmp); | |
772 | if (ret < 0) { | |
6708bb27 | 773 | pr_err("core_scsi3_lunacl_depend" |
c66ac9db | 774 | "_item() failed\n"); |
9e37d042 | 775 | percpu_ref_put(&lun_tmp->lun_ref); |
29a05dee | 776 | kref_put(&deve_tmp->pr_kref, target_pr_kref_release); |
c66ac9db NB |
777 | goto out; |
778 | } | |
779 | /* | |
780 | * Located a matching SCSI Initiator Port on a different | |
781 | * port, allocate the pr_reg_atp and attach it to the | |
782 | * pr_reg->pr_reg_atp_list that will be processed once | |
783 | * the original *pr_reg is processed in | |
784 | * __core_scsi3_add_registration() | |
785 | */ | |
adf653f9 | 786 | dest_lun = rcu_dereference_check(deve_tmp->se_lun, |
2c935bc5 | 787 | kref_read(&deve_tmp->pr_kref) != 0); |
79dc9c9e | 788 | |
c66ac9db | 789 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, |
adf653f9 | 790 | nacl_tmp, dest_lun, deve_tmp, |
79dc9c9e | 791 | deve_tmp->mapped_lun, NULL, |
c66ac9db | 792 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 793 | if (!pr_reg_atp) { |
9e37d042 | 794 | percpu_ref_put(&lun_tmp->lun_ref); |
c66ac9db NB |
795 | core_scsi3_lunacl_undepend_item(deve_tmp); |
796 | goto out; | |
797 | } | |
798 | ||
799 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, | |
800 | &pr_reg->pr_reg_atp_list); | |
1adff1b3 | 801 | spin_lock(&lun_tmp->lun_deve_lock); |
c66ac9db | 802 | } |
1adff1b3 | 803 | spin_unlock(&lun_tmp->lun_deve_lock); |
c66ac9db NB |
804 | |
805 | spin_lock(&dev->se_port_lock); | |
9e37d042 | 806 | percpu_ref_put(&lun_tmp->lun_ref); |
c66ac9db NB |
807 | } |
808 | spin_unlock(&dev->se_port_lock); | |
809 | ||
810 | return pr_reg; | |
811 | out: | |
812 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
813 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
814 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
815 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
816 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
817 | } | |
818 | kmem_cache_free(t10_pr_reg_cache, pr_reg); | |
819 | return NULL; | |
820 | } | |
821 | ||
822 | int core_scsi3_alloc_aptpl_registration( | |
e3d6f909 | 823 | struct t10_reservation *pr_tmpl, |
c66ac9db NB |
824 | u64 sa_res_key, |
825 | unsigned char *i_port, | |
826 | unsigned char *isid, | |
f2d30680 | 827 | u64 mapped_lun, |
c66ac9db NB |
828 | unsigned char *t_port, |
829 | u16 tpgt, | |
f2d30680 | 830 | u64 target_lun, |
c66ac9db NB |
831 | int res_holder, |
832 | int all_tg_pt, | |
833 | u8 type) | |
834 | { | |
835 | struct t10_pr_registration *pr_reg; | |
836 | ||
6708bb27 AG |
837 | if (!i_port || !t_port || !sa_res_key) { |
838 | pr_err("Illegal parameters for APTPL registration\n"); | |
e3d6f909 | 839 | return -EINVAL; |
c66ac9db NB |
840 | } |
841 | ||
842 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); | |
6708bb27 AG |
843 | if (!pr_reg) { |
844 | pr_err("Unable to allocate struct t10_pr_registration\n"); | |
e3d6f909 | 845 | return -ENOMEM; |
c66ac9db | 846 | } |
c66ac9db NB |
847 | |
848 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); | |
849 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); | |
850 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); | |
851 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); | |
852 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); | |
853 | atomic_set(&pr_reg->pr_res_holders, 0); | |
854 | pr_reg->pr_reg_nacl = NULL; | |
855 | pr_reg->pr_reg_deve = NULL; | |
856 | pr_reg->pr_res_mapped_lun = mapped_lun; | |
857 | pr_reg->pr_aptpl_target_lun = target_lun; | |
858 | pr_reg->pr_res_key = sa_res_key; | |
859 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; | |
860 | pr_reg->pr_reg_aptpl = 1; | |
c66ac9db NB |
861 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ |
862 | pr_reg->pr_res_type = type; | |
863 | /* | |
864 | * If an ISID value had been saved in APTPL metadata for this | |
865 | * SCSI Initiator Port, restore it now. | |
866 | */ | |
867 | if (isid != NULL) { | |
868 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); | |
869 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); | |
870 | pr_reg->isid_present_at_reg = 1; | |
871 | } | |
872 | /* | |
873 | * Copy the i_port and t_port information from caller. | |
874 | */ | |
875 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); | |
876 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); | |
877 | pr_reg->pr_reg_tpgt = tpgt; | |
878 | /* | |
879 | * Set pr_res_holder from caller, the pr_reg who is the reservation | |
880 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once | |
881 | * the Initiator Node LUN ACL from the fabric module is created for | |
882 | * this registration. | |
883 | */ | |
884 | pr_reg->pr_res_holder = res_holder; | |
885 | ||
886 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); | |
6708bb27 | 887 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
c66ac9db NB |
888 | " metadata\n", (res_holder) ? "+reservation" : ""); |
889 | return 0; | |
890 | } | |
891 | ||
892 | static void core_scsi3_aptpl_reserve( | |
893 | struct se_device *dev, | |
894 | struct se_portal_group *tpg, | |
895 | struct se_node_acl *node_acl, | |
896 | struct t10_pr_registration *pr_reg) | |
897 | { | |
898 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
899 | |
900 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 901 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
902 | |
903 | spin_lock(&dev->dev_reservation_lock); | |
904 | dev->dev_pr_res_holder = pr_reg; | |
905 | spin_unlock(&dev->dev_reservation_lock); | |
906 | ||
6708bb27 | 907 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
c66ac9db | 908 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
30c7ca93 | 909 | tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
910 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
911 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 912 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
30c7ca93 | 913 | tpg->se_tpg_tfo->fabric_name, node_acl->initiatorname, |
d2843c17 | 914 | i_buf); |
c66ac9db NB |
915 | } |
916 | ||
917 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, | |
33ce6a87 | 918 | struct t10_pr_registration *, enum register_type, int); |
c66ac9db NB |
919 | |
920 | static int __core_scsi3_check_aptpl_registration( | |
921 | struct se_device *dev, | |
922 | struct se_portal_group *tpg, | |
923 | struct se_lun *lun, | |
f2d30680 | 924 | u64 target_lun, |
c66ac9db | 925 | struct se_node_acl *nacl, |
f2d30680 | 926 | u64 mapped_lun) |
c66ac9db NB |
927 | { |
928 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 929 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
930 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
931 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; | |
932 | u16 tpgt; | |
933 | ||
934 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); | |
935 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); | |
936 | /* | |
937 | * Copy Initiator Port information from struct se_node_acl | |
938 | */ | |
939 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); | |
940 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", | |
e3d6f909 AG |
941 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
942 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
c66ac9db NB |
943 | /* |
944 | * Look for the matching registrations+reservation from those | |
945 | * created from APTPL metadata. Note that multiple registrations | |
946 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port | |
947 | * TransportIDs. | |
948 | */ | |
949 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
950 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
951 | pr_reg_aptpl_list) { | |
92404e60 | 952 | |
6708bb27 | 953 | if (!strcmp(pr_reg->pr_iport, i_port) && |
29a05dee | 954 | (pr_reg->pr_res_mapped_lun == mapped_lun) && |
c66ac9db NB |
955 | !(strcmp(pr_reg->pr_tport, t_port)) && |
956 | (pr_reg->pr_reg_tpgt == tpgt) && | |
957 | (pr_reg->pr_aptpl_target_lun == target_lun)) { | |
3ccd6e83 NB |
958 | /* |
959 | * Obtain the ->pr_reg_deve pointer + reference, that | |
960 | * is released by __core_scsi3_add_registration() below. | |
961 | */ | |
962 | rcu_read_lock(); | |
963 | pr_reg->pr_reg_deve = target_nacl_find_deve(nacl, mapped_lun); | |
964 | if (!pr_reg->pr_reg_deve) { | |
965 | pr_err("Unable to locate PR APTPL %s mapped_lun:" | |
966 | " %llu\n", nacl->initiatorname, mapped_lun); | |
967 | rcu_read_unlock(); | |
968 | continue; | |
969 | } | |
970 | kref_get(&pr_reg->pr_reg_deve->pr_kref); | |
971 | rcu_read_unlock(); | |
c66ac9db NB |
972 | |
973 | pr_reg->pr_reg_nacl = nacl; | |
adf653f9 | 974 | pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi; |
c66ac9db NB |
975 | list_del(&pr_reg->pr_reg_aptpl_list); |
976 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
977 | /* | |
978 | * At this point all of the pointers in *pr_reg will | |
979 | * be setup, so go ahead and add the registration. | |
980 | */ | |
c66ac9db NB |
981 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); |
982 | /* | |
983 | * If this registration is the reservation holder, | |
984 | * make that happen now.. | |
985 | */ | |
986 | if (pr_reg->pr_res_holder) | |
987 | core_scsi3_aptpl_reserve(dev, tpg, | |
988 | nacl, pr_reg); | |
989 | /* | |
990 | * Reenable pr_aptpl_active to accept new metadata | |
991 | * updates once the SCSI device is active again.. | |
992 | */ | |
993 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
994 | pr_tmpl->pr_aptpl_active = 1; | |
995 | } | |
996 | } | |
997 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | int core_scsi3_check_aptpl_registration( | |
1003 | struct se_device *dev, | |
1004 | struct se_portal_group *tpg, | |
1005 | struct se_lun *lun, | |
e2480563 | 1006 | struct se_node_acl *nacl, |
f2d30680 | 1007 | u64 mapped_lun) |
c66ac9db | 1008 | { |
d977f437 | 1009 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
c66ac9db NB |
1010 | return 0; |
1011 | ||
1012 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, | |
29a05dee NB |
1013 | lun->unpacked_lun, nacl, |
1014 | mapped_lun); | |
c66ac9db NB |
1015 | } |
1016 | ||
1017 | static void __core_scsi3_dump_registration( | |
9ac8928e | 1018 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
1019 | struct se_device *dev, |
1020 | struct se_node_acl *nacl, | |
1021 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1022 | enum register_type register_type) |
c66ac9db NB |
1023 | { |
1024 | struct se_portal_group *se_tpg = nacl->se_tpg; | |
1025 | char i_buf[PR_REG_ISID_ID_LEN]; | |
c66ac9db NB |
1026 | |
1027 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1028 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1029 | |
6708bb27 | 1030 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
30c7ca93 | 1031 | " Node: %s%s\n", tfo->fabric_name, (register_type == REGISTER_AND_MOVE) ? |
33ce6a87 | 1032 | "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? |
c66ac9db | 1033 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, |
d2843c17 | 1034 | i_buf); |
6708bb27 | 1035 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
30c7ca93 | 1036 | tfo->fabric_name, tfo->tpg_get_wwn(se_tpg), |
c66ac9db | 1037 | tfo->tpg_get_tag(se_tpg)); |
6708bb27 | 1038 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
30c7ca93 | 1039 | " Port(s)\n", tfo->fabric_name, |
c66ac9db | 1040 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", |
e3d6f909 | 1041 | dev->transport->name); |
6708bb27 | 1042 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
30c7ca93 | 1043 | " 0x%08x APTPL: %d\n", tfo->fabric_name, |
c66ac9db NB |
1044 | pr_reg->pr_res_key, pr_reg->pr_res_generation, |
1045 | pr_reg->pr_reg_aptpl); | |
1046 | } | |
1047 | ||
c66ac9db NB |
1048 | static void __core_scsi3_add_registration( |
1049 | struct se_device *dev, | |
1050 | struct se_node_acl *nacl, | |
1051 | struct t10_pr_registration *pr_reg, | |
33ce6a87 | 1052 | enum register_type register_type, |
c66ac9db NB |
1053 | int register_move) |
1054 | { | |
9ac8928e | 1055 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 1056 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
0fd97ccf | 1057 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 | 1058 | struct se_dev_entry *deve; |
c66ac9db NB |
1059 | |
1060 | /* | |
1061 | * Increment PRgeneration counter for struct se_device upon a successful | |
1062 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action | |
1063 | * | |
1064 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service | |
1065 | * action, the struct se_device->dev_reservation_lock will already be held, | |
1066 | * so we do not call core_scsi3_pr_generation() which grabs the lock | |
1067 | * for the REGISTER. | |
1068 | */ | |
1069 | pr_reg->pr_res_generation = (register_move) ? | |
0fd97ccf | 1070 | dev->t10_pr.pr_generation++ : |
c66ac9db NB |
1071 | core_scsi3_pr_generation(dev); |
1072 | ||
1073 | spin_lock(&pr_tmpl->registration_lock); | |
1074 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); | |
c66ac9db NB |
1075 | |
1076 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); | |
1077 | spin_unlock(&pr_tmpl->registration_lock); | |
1078 | /* | |
1079 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. | |
1080 | */ | |
6708bb27 | 1081 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
3ccd6e83 | 1082 | goto out; |
c66ac9db NB |
1083 | /* |
1084 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 | |
1085 | * allocated in __core_scsi3_alloc_registration() | |
1086 | */ | |
1087 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1088 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { | |
80bfdfa9 NB |
1089 | struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl; |
1090 | ||
c66ac9db NB |
1091 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
1092 | ||
1093 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); | |
1094 | ||
1095 | spin_lock(&pr_tmpl->registration_lock); | |
1096 | list_add_tail(&pr_reg_tmp->pr_reg_list, | |
1097 | &pr_tmpl->registration_list); | |
c66ac9db | 1098 | |
80bfdfa9 NB |
1099 | __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp, |
1100 | register_type); | |
c66ac9db | 1101 | spin_unlock(&pr_tmpl->registration_lock); |
3ccd6e83 NB |
1102 | /* |
1103 | * Drop configfs group dependency reference and deve->pr_kref | |
1104 | * obtained from __core_scsi3_alloc_registration() code. | |
1105 | */ | |
80bfdfa9 NB |
1106 | rcu_read_lock(); |
1107 | deve = pr_reg_tmp->pr_reg_deve; | |
3ccd6e83 | 1108 | if (deve) { |
80bfdfa9 | 1109 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); |
3ccd6e83 NB |
1110 | core_scsi3_lunacl_undepend_item(deve); |
1111 | pr_reg_tmp->pr_reg_deve = NULL; | |
1112 | } | |
80bfdfa9 | 1113 | rcu_read_unlock(); |
c66ac9db | 1114 | } |
3ccd6e83 NB |
1115 | out: |
1116 | /* | |
1117 | * Drop deve->pr_kref obtained in __core_scsi3_do_alloc_registration() | |
1118 | */ | |
1119 | rcu_read_lock(); | |
1120 | deve = pr_reg->pr_reg_deve; | |
1121 | if (deve) { | |
1122 | set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1123 | kref_put(&deve->pr_kref, target_pr_kref_release); | |
1124 | pr_reg->pr_reg_deve = NULL; | |
1125 | } | |
1126 | rcu_read_unlock(); | |
c66ac9db NB |
1127 | } |
1128 | ||
1129 | static int core_scsi3_alloc_registration( | |
1130 | struct se_device *dev, | |
1131 | struct se_node_acl *nacl, | |
79dc9c9e | 1132 | struct se_lun *lun, |
c66ac9db | 1133 | struct se_dev_entry *deve, |
f2d30680 | 1134 | u64 mapped_lun, |
c66ac9db NB |
1135 | unsigned char *isid, |
1136 | u64 sa_res_key, | |
1137 | int all_tg_pt, | |
1138 | int aptpl, | |
33ce6a87 | 1139 | enum register_type register_type, |
c66ac9db NB |
1140 | int register_move) |
1141 | { | |
1142 | struct t10_pr_registration *pr_reg; | |
1143 | ||
79dc9c9e NB |
1144 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun, |
1145 | isid, sa_res_key, all_tg_pt, | |
1146 | aptpl); | |
6708bb27 | 1147 | if (!pr_reg) |
e3d6f909 | 1148 | return -EPERM; |
c66ac9db NB |
1149 | |
1150 | __core_scsi3_add_registration(dev, nacl, pr_reg, | |
1151 | register_type, register_move); | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( | |
1156 | struct se_device *dev, | |
1157 | struct se_node_acl *nacl, | |
1158 | unsigned char *isid) | |
1159 | { | |
0fd97ccf | 1160 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1161 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
1162 | struct se_portal_group *tpg; | |
1163 | ||
1164 | spin_lock(&pr_tmpl->registration_lock); | |
1165 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1166 | &pr_tmpl->registration_list, pr_reg_list) { | |
1167 | /* | |
1168 | * First look for a matching struct se_node_acl | |
1169 | */ | |
1170 | if (pr_reg->pr_reg_nacl != nacl) | |
1171 | continue; | |
1172 | ||
1173 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
1174 | /* | |
1175 | * If this registration does NOT contain a fabric provided | |
1176 | * ISID, then we have found a match. | |
1177 | */ | |
6708bb27 | 1178 | if (!pr_reg->isid_present_at_reg) { |
c66ac9db NB |
1179 | /* |
1180 | * Determine if this SCSI device server requires that | |
1181 | * SCSI Intiatior TransportID w/ ISIDs is enforced | |
1182 | * for fabric modules (iSCSI) requiring them. | |
1183 | */ | |
e3d6f909 | 1184 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
0fd97ccf | 1185 | if (dev->dev_attrib.enforce_pr_isids) |
c66ac9db NB |
1186 | continue; |
1187 | } | |
33940d09 | 1188 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1189 | spin_unlock(&pr_tmpl->registration_lock); |
1190 | return pr_reg; | |
1191 | } | |
1192 | /* | |
1193 | * If the *pr_reg contains a fabric defined ISID for multi-value | |
1194 | * SCSI Initiator Port TransportIDs, then we expect a valid | |
1195 | * matching ISID to be provided by the local SCSI Initiator Port. | |
1196 | */ | |
6708bb27 | 1197 | if (!isid) |
c66ac9db NB |
1198 | continue; |
1199 | if (strcmp(isid, pr_reg->pr_reg_isid)) | |
1200 | continue; | |
1201 | ||
33940d09 | 1202 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1203 | spin_unlock(&pr_tmpl->registration_lock); |
1204 | return pr_reg; | |
1205 | } | |
1206 | spin_unlock(&pr_tmpl->registration_lock); | |
1207 | ||
1208 | return NULL; | |
1209 | } | |
1210 | ||
1211 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( | |
1212 | struct se_device *dev, | |
1213 | struct se_node_acl *nacl, | |
1214 | struct se_session *sess) | |
1215 | { | |
1216 | struct se_portal_group *tpg = nacl->se_tpg; | |
1217 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; | |
1218 | ||
e3d6f909 | 1219 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 1220 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 1221 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
c66ac9db NB |
1222 | PR_REG_ISID_LEN); |
1223 | isid_ptr = &buf[0]; | |
1224 | } | |
1225 | ||
1226 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); | |
1227 | } | |
1228 | ||
1229 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) | |
1230 | { | |
33940d09 | 1231 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
1232 | } |
1233 | ||
125d0119 | 1234 | static int core_scsi3_check_implicit_release( |
c66ac9db NB |
1235 | struct se_device *dev, |
1236 | struct t10_pr_registration *pr_reg) | |
1237 | { | |
1238 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
1239 | struct t10_pr_registration *pr_res_holder; | |
1240 | int ret = 0; | |
1241 | ||
1242 | spin_lock(&dev->dev_reservation_lock); | |
1243 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 1244 | if (!pr_res_holder) { |
c66ac9db NB |
1245 | spin_unlock(&dev->dev_reservation_lock); |
1246 | return ret; | |
1247 | } | |
1248 | if (pr_res_holder == pr_reg) { | |
1249 | /* | |
125d0119 | 1250 | * Perform an implicit RELEASE if the registration that |
c66ac9db NB |
1251 | * is being released is holding the reservation. |
1252 | * | |
1253 | * From spc4r17, section 5.7.11.1: | |
1254 | * | |
1255 | * e) If the I_T nexus is the persistent reservation holder | |
1256 | * and the persistent reservation is not an all registrants | |
1257 | * type, then a PERSISTENT RESERVE OUT command with REGISTER | |
1258 | * service action or REGISTER AND IGNORE EXISTING KEY | |
1259 | * service action with the SERVICE ACTION RESERVATION KEY | |
1260 | * field set to zero (see 5.7.11.3). | |
1261 | */ | |
6c3c9baa | 1262 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0, 1); |
c66ac9db NB |
1263 | ret = 1; |
1264 | /* | |
1265 | * For 'All Registrants' reservation types, all existing | |
1266 | * registrations are still processed as reservation holders | |
1267 | * in core_scsi3_pr_seq_non_holder() after the initial | |
125d0119 | 1268 | * reservation holder is implicitly released here. |
c66ac9db NB |
1269 | */ |
1270 | } else if (pr_reg->pr_reg_all_tg_pt && | |
1271 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, | |
1272 | pr_reg->pr_reg_nacl->initiatorname)) && | |
1273 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { | |
6708bb27 | 1274 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
c66ac9db NB |
1275 | " UNREGISTER while existing reservation with matching" |
1276 | " key 0x%016Lx is present from another SCSI Initiator" | |
1277 | " Port\n", pr_reg->pr_res_key); | |
e3d6f909 | 1278 | ret = -EPERM; |
c66ac9db NB |
1279 | } |
1280 | spin_unlock(&dev->dev_reservation_lock); | |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
c66ac9db NB |
1285 | static void __core_scsi3_free_registration( |
1286 | struct se_device *dev, | |
1287 | struct t10_pr_registration *pr_reg, | |
1288 | struct list_head *preempt_and_abort_list, | |
1289 | int dec_holders) | |
cb0df4d3 BVA |
1290 | __releases(&pr_tmpl->registration_lock) |
1291 | __acquires(&pr_tmpl->registration_lock) | |
c66ac9db | 1292 | { |
9ac8928e | 1293 | const struct target_core_fabric_ops *tfo = |
c66ac9db | 1294 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
0fd97ccf | 1295 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
80bfdfa9 NB |
1296 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; |
1297 | struct se_dev_entry *deve; | |
c66ac9db | 1298 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 1299 | |
618baaf7 BVA |
1300 | lockdep_assert_held(&pr_tmpl->registration_lock); |
1301 | ||
c66ac9db | 1302 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
d2843c17 | 1303 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1304 | |
6c3c9baa NB |
1305 | if (!list_empty(&pr_reg->pr_reg_list)) |
1306 | list_del(&pr_reg->pr_reg_list); | |
c66ac9db NB |
1307 | /* |
1308 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), | |
1309 | * so call core_scsi3_put_pr_reg() to decrement our reference. | |
1310 | */ | |
1311 | if (dec_holders) | |
1312 | core_scsi3_put_pr_reg(pr_reg); | |
80bfdfa9 NB |
1313 | |
1314 | spin_unlock(&pr_tmpl->registration_lock); | |
c66ac9db NB |
1315 | /* |
1316 | * Wait until all reference from any other I_T nexuses for this | |
1317 | * *pr_reg have been released. Because list_del() is called above, | |
1318 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference | |
1319 | * count back to zero, and we release *pr_reg. | |
1320 | */ | |
1321 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { | |
6708bb27 | 1322 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
30c7ca93 | 1323 | tfo->fabric_name); |
c66ac9db | 1324 | cpu_relax(); |
c66ac9db NB |
1325 | } |
1326 | ||
80bfdfa9 NB |
1327 | rcu_read_lock(); |
1328 | deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun); | |
1329 | if (deve) | |
1330 | clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags); | |
1331 | rcu_read_unlock(); | |
1332 | ||
1333 | spin_lock(&pr_tmpl->registration_lock); | |
6708bb27 | 1334 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
30c7ca93 | 1335 | " Node: %s%s\n", tfo->fabric_name, |
c66ac9db | 1336 | pr_reg->pr_reg_nacl->initiatorname, |
d2843c17 | 1337 | i_buf); |
6708bb27 | 1338 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
30c7ca93 | 1339 | " Port(s)\n", tfo->fabric_name, |
c66ac9db | 1340 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", |
e3d6f909 | 1341 | dev->transport->name); |
6708bb27 | 1342 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
30c7ca93 | 1343 | " 0x%08x\n", tfo->fabric_name, pr_reg->pr_res_key, |
c66ac9db NB |
1344 | pr_reg->pr_res_generation); |
1345 | ||
6708bb27 | 1346 | if (!preempt_and_abort_list) { |
c66ac9db NB |
1347 | pr_reg->pr_reg_deve = NULL; |
1348 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
1349 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1350 | return; | |
1351 | } | |
1352 | /* | |
1353 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list | |
1354 | * are released once the ABORT_TASK_SET has completed.. | |
1355 | */ | |
1356 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); | |
1357 | } | |
1358 | ||
1359 | void core_scsi3_free_pr_reg_from_nacl( | |
1360 | struct se_device *dev, | |
1361 | struct se_node_acl *nacl) | |
1362 | { | |
0fd97ccf | 1363 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 1364 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
6c3c9baa | 1365 | bool free_reg = false; |
c66ac9db NB |
1366 | /* |
1367 | * If the passed se_node_acl matches the reservation holder, | |
1368 | * release the reservation. | |
1369 | */ | |
1370 | spin_lock(&dev->dev_reservation_lock); | |
1371 | pr_res_holder = dev->dev_pr_res_holder; | |
1372 | if ((pr_res_holder != NULL) && | |
6c3c9baa NB |
1373 | (pr_res_holder->pr_reg_nacl == nacl)) { |
1374 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0, 1); | |
1375 | free_reg = true; | |
1376 | } | |
c66ac9db NB |
1377 | spin_unlock(&dev->dev_reservation_lock); |
1378 | /* | |
1379 | * Release any registration associated with the struct se_node_acl. | |
1380 | */ | |
1381 | spin_lock(&pr_tmpl->registration_lock); | |
6c3c9baa NB |
1382 | if (pr_res_holder && free_reg) |
1383 | __core_scsi3_free_registration(dev, pr_res_holder, NULL, 0); | |
1384 | ||
c66ac9db NB |
1385 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
1386 | &pr_tmpl->registration_list, pr_reg_list) { | |
1387 | ||
1388 | if (pr_reg->pr_reg_nacl != nacl) | |
1389 | continue; | |
1390 | ||
1391 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1392 | } | |
1393 | spin_unlock(&pr_tmpl->registration_lock); | |
1394 | } | |
1395 | ||
1396 | void core_scsi3_free_all_registrations( | |
1397 | struct se_device *dev) | |
1398 | { | |
0fd97ccf | 1399 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db NB |
1400 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
1401 | ||
1402 | spin_lock(&dev->dev_reservation_lock); | |
1403 | pr_res_holder = dev->dev_pr_res_holder; | |
1404 | if (pr_res_holder != NULL) { | |
1405 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
1406 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 1407 | pr_res_holder, 0, 0); |
c66ac9db NB |
1408 | } |
1409 | spin_unlock(&dev->dev_reservation_lock); | |
1410 | ||
1411 | spin_lock(&pr_tmpl->registration_lock); | |
1412 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
1413 | &pr_tmpl->registration_list, pr_reg_list) { | |
1414 | ||
1415 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); | |
1416 | } | |
1417 | spin_unlock(&pr_tmpl->registration_lock); | |
1418 | ||
1419 | spin_lock(&pr_tmpl->aptpl_reg_lock); | |
1420 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, | |
1421 | pr_reg_aptpl_list) { | |
1422 | list_del(&pr_reg->pr_reg_aptpl_list); | |
c66ac9db NB |
1423 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
1424 | } | |
1425 | spin_unlock(&pr_tmpl->aptpl_reg_lock); | |
1426 | } | |
1427 | ||
1428 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) | |
1429 | { | |
d588cf8f | 1430 | return target_depend_item(&tpg->tpg_group.cg_item); |
c66ac9db NB |
1431 | } |
1432 | ||
1433 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) | |
1434 | { | |
d588cf8f | 1435 | target_undepend_item(&tpg->tpg_group.cg_item); |
33940d09 | 1436 | atomic_dec_mb(&tpg->tpg_pr_ref_count); |
c66ac9db NB |
1437 | } |
1438 | ||
1439 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) | |
1440 | { | |
c66ac9db NB |
1441 | if (nacl->dynamic_node_acl) |
1442 | return 0; | |
d588cf8f | 1443 | return target_depend_item(&nacl->acl_group.cg_item); |
c66ac9db NB |
1444 | } |
1445 | ||
1446 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) | |
1447 | { | |
d588cf8f CH |
1448 | if (!nacl->dynamic_node_acl) |
1449 | target_undepend_item(&nacl->acl_group.cg_item); | |
33940d09 | 1450 | atomic_dec_mb(&nacl->acl_pr_ref_count); |
c66ac9db NB |
1451 | } |
1452 | ||
1453 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) | |
1454 | { | |
79dc9c9e | 1455 | struct se_lun_acl *lun_acl; |
ac75d8be | 1456 | |
c66ac9db NB |
1457 | /* |
1458 | * For nacl->dynamic_node_acl=1 | |
1459 | */ | |
79dc9c9e | 1460 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
2c935bc5 | 1461 | kref_read(&se_deve->pr_kref) != 0); |
6708bb27 | 1462 | if (!lun_acl) |
c66ac9db NB |
1463 | return 0; |
1464 | ||
d588cf8f | 1465 | return target_depend_item(&lun_acl->se_lun_group.cg_item); |
c66ac9db NB |
1466 | } |
1467 | ||
1468 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) | |
1469 | { | |
29a05dee | 1470 | struct se_lun_acl *lun_acl; |
ac75d8be | 1471 | |
c66ac9db NB |
1472 | /* |
1473 | * For nacl->dynamic_node_acl=1 | |
1474 | */ | |
79dc9c9e | 1475 | lun_acl = rcu_dereference_check(se_deve->se_lun_acl, |
2c935bc5 | 1476 | kref_read(&se_deve->pr_kref) != 0); |
6708bb27 | 1477 | if (!lun_acl) { |
29a05dee | 1478 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1479 | return; |
1480 | } | |
c66ac9db | 1481 | |
d588cf8f | 1482 | target_undepend_item(&lun_acl->se_lun_group.cg_item); |
29a05dee | 1483 | kref_put(&se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1484 | } |
1485 | ||
de103c93 CH |
1486 | static sense_reason_t |
1487 | core_scsi3_decode_spec_i_port( | |
c66ac9db NB |
1488 | struct se_cmd *cmd, |
1489 | struct se_portal_group *tpg, | |
1490 | unsigned char *l_isid, | |
1491 | u64 sa_res_key, | |
1492 | int all_tg_pt, | |
1493 | int aptpl) | |
1494 | { | |
5951146d | 1495 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1496 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; |
e3d6f909 | 1497 | struct se_session *se_sess = cmd->se_sess; |
c66ac9db | 1498 | struct se_node_acl *dest_node_acl = NULL; |
79dc9c9e | 1499 | struct se_dev_entry *dest_se_deve = NULL; |
c66ac9db NB |
1500 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; |
1501 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; | |
d0f474e5 | 1502 | LIST_HEAD(tid_dest_list); |
c66ac9db | 1503 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
2650d71e | 1504 | unsigned char *buf, *ptr, proto_ident; |
9b353cc8 | 1505 | const unsigned char *i_str = NULL; |
13ba564c | 1506 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 1507 | sense_reason_t ret; |
c66ac9db | 1508 | u32 tpdl, tid_len = 0; |
c66ac9db NB |
1509 | u32 dest_rtpi = 0; |
1510 | ||
c66ac9db NB |
1511 | /* |
1512 | * Allocate a struct pr_transport_id_holder and setup the | |
79dc9c9e NB |
1513 | * local_node_acl pointer and add to struct list_head tid_dest_list |
1514 | * for add registration processing in the loop of tid_dest_list below. | |
c66ac9db NB |
1515 | */ |
1516 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); | |
6708bb27 AG |
1517 | if (!tidh_new) { |
1518 | pr_err("Unable to allocate tidh_new\n"); | |
79dd6f2f | 1519 | return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
c66ac9db NB |
1520 | } |
1521 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1522 | tidh_new->dest_tpg = tpg; | |
1523 | tidh_new->dest_node_acl = se_sess->se_node_acl; | |
c66ac9db | 1524 | |
5951146d | 1525 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1526 | se_sess->se_node_acl, cmd->se_lun, |
1527 | NULL, cmd->orig_fe_lun, l_isid, | |
c66ac9db | 1528 | sa_res_key, all_tg_pt, aptpl); |
6708bb27 | 1529 | if (!local_pr_reg) { |
c66ac9db | 1530 | kfree(tidh_new); |
79dd6f2f | 1531 | return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
c66ac9db NB |
1532 | } |
1533 | tidh_new->dest_pr_reg = local_pr_reg; | |
1534 | /* | |
1535 | * The local I_T nexus does not hold any configfs dependances, | |
79dc9c9e | 1536 | * so we set tidh_new->dest_se_deve to NULL to prevent the |
c66ac9db NB |
1537 | * configfs_undepend_item() calls in the tid_dest_list loops below. |
1538 | */ | |
79dc9c9e | 1539 | tidh_new->dest_se_deve = NULL; |
c66ac9db | 1540 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); |
05d1c7c0 | 1541 | |
0d7f1299 PB |
1542 | if (cmd->data_length < 28) { |
1543 | pr_warn("SPC-PR: Received PR OUT parameter list" | |
1544 | " length too small: %u\n", cmd->data_length); | |
de103c93 | 1545 | ret = TCM_INVALID_PARAMETER_LIST; |
0d7f1299 PB |
1546 | goto out; |
1547 | } | |
1548 | ||
4949314c | 1549 | buf = transport_kmap_data_sg(cmd); |
de103c93 | 1550 | if (!buf) { |
79dd6f2f | 1551 | ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
de103c93 CH |
1552 | goto out; |
1553 | } | |
1554 | ||
c66ac9db NB |
1555 | /* |
1556 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, | |
1557 | * first extract TransportID Parameter Data Length, and make sure | |
1558 | * the value matches up to the SCSI expected data transfer length. | |
1559 | */ | |
a85d667e | 1560 | tpdl = get_unaligned_be32(&buf[24]); |
c66ac9db NB |
1561 | |
1562 | if ((tpdl + 28) != cmd->data_length) { | |
6708bb27 | 1563 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
c66ac9db NB |
1564 | " does not equal CDB data_length: %u\n", tpdl, |
1565 | cmd->data_length); | |
de103c93 CH |
1566 | ret = TCM_INVALID_PARAMETER_LIST; |
1567 | goto out_unmap; | |
c66ac9db NB |
1568 | } |
1569 | /* | |
1570 | * Start processing the received transport IDs using the | |
1571 | * receiving I_T Nexus portal's fabric dependent methods to | |
1572 | * obtain the SCSI Initiator Port/Device Identifiers. | |
1573 | */ | |
1574 | ptr = &buf[28]; | |
1575 | ||
1576 | while (tpdl > 0) { | |
adf653f9 | 1577 | struct se_lun *dest_lun, *tmp_lun; |
79dc9c9e | 1578 | |
c66ac9db NB |
1579 | proto_ident = (ptr[0] & 0x0f); |
1580 | dest_tpg = NULL; | |
1581 | ||
1582 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
1583 | list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { |
1584 | tmp_tpg = tmp_lun->lun_tpg; | |
2650d71e | 1585 | |
c66ac9db NB |
1586 | /* |
1587 | * Look for the matching proto_ident provided by | |
1588 | * the received TransportID | |
1589 | */ | |
2aeeafae | 1590 | if (tmp_tpg->proto_id != proto_ident) |
c66ac9db | 1591 | continue; |
adf653f9 | 1592 | dest_rtpi = tmp_lun->lun_rtpi; |
c66ac9db | 1593 | |
2650d71e | 1594 | i_str = target_parse_pr_out_transport_id(tmp_tpg, |
094bb5d7 | 1595 | ptr, &tid_len, &iport_ptr); |
6708bb27 | 1596 | if (!i_str) |
c66ac9db NB |
1597 | continue; |
1598 | ||
33940d09 | 1599 | atomic_inc_mb(&tmp_tpg->tpg_pr_ref_count); |
c66ac9db NB |
1600 | spin_unlock(&dev->se_port_lock); |
1601 | ||
de103c93 | 1602 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
6708bb27 | 1603 | pr_err(" core_scsi3_tpg_depend_item()" |
c66ac9db | 1604 | " for tmp_tpg\n"); |
33940d09 | 1605 | atomic_dec_mb(&tmp_tpg->tpg_pr_ref_count); |
de103c93 CH |
1606 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1607 | goto out_unmap; | |
c66ac9db NB |
1608 | } |
1609 | /* | |
35d1efe8 | 1610 | * Locate the destination initiator ACL to be registered |
c66ac9db NB |
1611 | * from the decoded fabric module specific TransportID |
1612 | * at *i_str. | |
1613 | */ | |
403edd78 | 1614 | mutex_lock(&tmp_tpg->acl_node_mutex); |
c66ac9db NB |
1615 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
1616 | tmp_tpg, i_str); | |
33940d09 JE |
1617 | if (dest_node_acl) |
1618 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 1619 | mutex_unlock(&tmp_tpg->acl_node_mutex); |
c66ac9db | 1620 | |
6708bb27 | 1621 | if (!dest_node_acl) { |
c66ac9db NB |
1622 | core_scsi3_tpg_undepend_item(tmp_tpg); |
1623 | spin_lock(&dev->se_port_lock); | |
1624 | continue; | |
1625 | } | |
1626 | ||
de103c93 | 1627 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
6708bb27 | 1628 | pr_err("configfs_depend_item() failed" |
c66ac9db | 1629 | " for dest_node_acl->acl_group\n"); |
33940d09 | 1630 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 1631 | core_scsi3_tpg_undepend_item(tmp_tpg); |
de103c93 CH |
1632 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1633 | goto out_unmap; | |
c66ac9db NB |
1634 | } |
1635 | ||
1636 | dest_tpg = tmp_tpg; | |
6708bb27 | 1637 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
c66ac9db | 1638 | " %s Port RTPI: %hu\n", |
30c7ca93 | 1639 | dest_tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
1640 | dest_node_acl->initiatorname, dest_rtpi); |
1641 | ||
1642 | spin_lock(&dev->se_port_lock); | |
1643 | break; | |
1644 | } | |
1645 | spin_unlock(&dev->se_port_lock); | |
1646 | ||
6708bb27 AG |
1647 | if (!dest_tpg) { |
1648 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" | |
c66ac9db | 1649 | " dest_tpg\n"); |
de103c93 CH |
1650 | ret = TCM_INVALID_PARAMETER_LIST; |
1651 | goto out_unmap; | |
c66ac9db | 1652 | } |
8b1e1244 | 1653 | |
6708bb27 | 1654 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
c66ac9db | 1655 | " tid_len: %d for %s + %s\n", |
30c7ca93 | 1656 | dest_tpg->se_tpg_tfo->fabric_name, cmd->data_length, |
c66ac9db | 1657 | tpdl, tid_len, i_str, iport_ptr); |
8b1e1244 | 1658 | |
c66ac9db | 1659 | if (tid_len > tpdl) { |
6708bb27 | 1660 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
c66ac9db NB |
1661 | " %u for Transport ID: %s\n", tid_len, ptr); |
1662 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1663 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1664 | ret = TCM_INVALID_PARAMETER_LIST; |
1665 | goto out_unmap; | |
c66ac9db NB |
1666 | } |
1667 | /* | |
1668 | * Locate the desintation struct se_dev_entry pointer for matching | |
1669 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus | |
1670 | * Target Port. | |
1671 | */ | |
1672 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, | |
1673 | dest_rtpi); | |
6708bb27 AG |
1674 | if (!dest_se_deve) { |
1675 | pr_err("Unable to locate %s dest_se_deve" | |
c66ac9db | 1676 | " from destination RTPI: %hu\n", |
30c7ca93 | 1677 | dest_tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
1678 | dest_rtpi); |
1679 | ||
1680 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1681 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1682 | ret = TCM_INVALID_PARAMETER_LIST; |
1683 | goto out_unmap; | |
c66ac9db NB |
1684 | } |
1685 | ||
de103c93 | 1686 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 1687 | pr_err("core_scsi3_lunacl_depend_item()" |
c66ac9db | 1688 | " failed\n"); |
29a05dee | 1689 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db NB |
1690 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
1691 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1692 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1693 | goto out_unmap; | |
c66ac9db | 1694 | } |
8b1e1244 | 1695 | |
6708bb27 | 1696 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
f2d30680 | 1697 | " dest_se_deve mapped_lun: %llu\n", |
30c7ca93 | 1698 | dest_tpg->se_tpg_tfo->fabric_name, |
c66ac9db | 1699 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
8b1e1244 | 1700 | |
c66ac9db NB |
1701 | /* |
1702 | * Skip any TransportIDs that already have a registration for | |
1703 | * this target port. | |
1704 | */ | |
1705 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
1706 | iport_ptr); | |
1707 | if (pr_reg_e) { | |
1708 | core_scsi3_put_pr_reg(pr_reg_e); | |
1709 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
1710 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1711 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1712 | ptr += tid_len; | |
1713 | tpdl -= tid_len; | |
1714 | tid_len = 0; | |
1715 | continue; | |
1716 | } | |
1717 | /* | |
1718 | * Allocate a struct pr_transport_id_holder and setup | |
1719 | * the dest_node_acl and dest_se_deve pointers for the | |
1720 | * loop below. | |
1721 | */ | |
1722 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), | |
1723 | GFP_KERNEL); | |
6708bb27 AG |
1724 | if (!tidh_new) { |
1725 | pr_err("Unable to allocate tidh_new\n"); | |
c66ac9db NB |
1726 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1727 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1728 | core_scsi3_tpg_undepend_item(dest_tpg); | |
de103c93 CH |
1729 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1730 | goto out_unmap; | |
c66ac9db NB |
1731 | } |
1732 | INIT_LIST_HEAD(&tidh_new->dest_list); | |
1733 | tidh_new->dest_tpg = dest_tpg; | |
1734 | tidh_new->dest_node_acl = dest_node_acl; | |
1735 | tidh_new->dest_se_deve = dest_se_deve; | |
1736 | ||
1737 | /* | |
1738 | * Allocate, but do NOT add the registration for the | |
1739 | * TransportID referenced SCSI Initiator port. This | |
1740 | * done because of the following from spc4r17 in section | |
1741 | * 6.14.3 wrt SPEC_I_PT: | |
1742 | * | |
1743 | * "If a registration fails for any initiator port (e.g., if th | |
1744 | * logical unit does not have enough resources available to | |
1745 | * hold the registration information), no registrations shall be | |
1746 | * made, and the command shall be terminated with | |
1747 | * CHECK CONDITION status." | |
1748 | * | |
1749 | * That means we call __core_scsi3_alloc_registration() here, | |
1750 | * and then call __core_scsi3_add_registration() in the | |
1751 | * 2nd loop which will never fail. | |
1752 | */ | |
79dc9c9e | 1753 | dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
2c935bc5 | 1754 | kref_read(&dest_se_deve->pr_kref) != 0); |
79dc9c9e | 1755 | |
5951146d | 1756 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
1757 | dest_node_acl, dest_lun, dest_se_deve, |
1758 | dest_se_deve->mapped_lun, iport_ptr, | |
1759 | sa_res_key, all_tg_pt, aptpl); | |
6708bb27 | 1760 | if (!dest_pr_reg) { |
c66ac9db NB |
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 | kfree(tidh_new); | |
79dd6f2f | 1765 | ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
de103c93 | 1766 | goto out_unmap; |
c66ac9db NB |
1767 | } |
1768 | tidh_new->dest_pr_reg = dest_pr_reg; | |
1769 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); | |
1770 | ||
1771 | ptr += tid_len; | |
1772 | tpdl -= tid_len; | |
1773 | tid_len = 0; | |
1774 | ||
1775 | } | |
05d1c7c0 | 1776 | |
4949314c | 1777 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 1778 | |
c66ac9db NB |
1779 | /* |
1780 | * Go ahead and create a registrations from tid_dest_list for the | |
1781 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl | |
1782 | * and dest_se_deve. | |
1783 | * | |
1784 | * The SA Reservation Key from the PROUT is set for the | |
1785 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 | |
1786 | * means that the TransportID Initiator port will be | |
1787 | * registered on all of the target ports in the SCSI target device | |
1788 | * ALL_TG_PT=0 means the registration will only be for the | |
1789 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 | |
1790 | * was received. | |
1791 | */ | |
1792 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1793 | dest_tpg = tidh->dest_tpg; | |
1794 | dest_node_acl = tidh->dest_node_acl; | |
1795 | dest_se_deve = tidh->dest_se_deve; | |
1796 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1797 | |
1798 | list_del(&tidh->dest_list); | |
1799 | kfree(tidh); | |
1800 | ||
1801 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
d2843c17 | 1802 | core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 1803 | |
5951146d | 1804 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
c66ac9db NB |
1805 | dest_pr_reg, 0, 0); |
1806 | ||
6708bb27 | 1807 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
c66ac9db | 1808 | " registered Transport ID for Node: %s%s Mapped LUN:" |
30c7ca93 | 1809 | " %llu\n", dest_tpg->se_tpg_tfo->fabric_name, |
79dc9c9e NB |
1810 | dest_node_acl->initiatorname, i_buf, (dest_se_deve) ? |
1811 | dest_se_deve->mapped_lun : 0); | |
c66ac9db | 1812 | |
3ccd6e83 NB |
1813 | if (!dest_se_deve) { |
1814 | kref_put(&local_pr_reg->pr_reg_deve->pr_kref, | |
1815 | target_pr_kref_release); | |
c66ac9db | 1816 | continue; |
3ccd6e83 | 1817 | } |
c66ac9db NB |
1818 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1819 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1820 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1821 | } | |
1822 | ||
1823 | return 0; | |
de103c93 | 1824 | out_unmap: |
4949314c | 1825 | transport_kunmap_data_sg(cmd); |
de103c93 | 1826 | out: |
c66ac9db NB |
1827 | /* |
1828 | * For the failure case, release everything from tid_dest_list | |
1829 | * including *dest_pr_reg and the configfs dependances.. | |
1830 | */ | |
1831 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { | |
1832 | dest_tpg = tidh->dest_tpg; | |
1833 | dest_node_acl = tidh->dest_node_acl; | |
1834 | dest_se_deve = tidh->dest_se_deve; | |
1835 | dest_pr_reg = tidh->dest_pr_reg; | |
c66ac9db NB |
1836 | |
1837 | list_del(&tidh->dest_list); | |
1838 | kfree(tidh); | |
1839 | /* | |
1840 | * Release any extra ALL_TG_PT=1 registrations for | |
1841 | * the SPEC_I_PT=1 case. | |
1842 | */ | |
1843 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, | |
1844 | &dest_pr_reg->pr_reg_atp_list, | |
1845 | pr_reg_atp_mem_list) { | |
1846 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); | |
1847 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); | |
1848 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); | |
1849 | } | |
1850 | ||
c66ac9db NB |
1851 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); |
1852 | ||
3ccd6e83 NB |
1853 | if (!dest_se_deve) { |
1854 | kref_put(&local_pr_reg->pr_reg_deve->pr_kref, | |
1855 | target_pr_kref_release); | |
c66ac9db | 1856 | continue; |
3ccd6e83 | 1857 | } |
c66ac9db NB |
1858 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
1859 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
1860 | core_scsi3_tpg_undepend_item(dest_tpg); | |
1861 | } | |
1862 | return ret; | |
1863 | } | |
1864 | ||
3c8a6228 | 1865 | static int core_scsi3_update_aptpl_buf( |
c66ac9db NB |
1866 | struct se_device *dev, |
1867 | unsigned char *buf, | |
0607decd | 1868 | u32 pr_aptpl_buf_len) |
c66ac9db | 1869 | { |
c66ac9db | 1870 | struct se_portal_group *tpg; |
c66ac9db NB |
1871 | struct t10_pr_registration *pr_reg; |
1872 | unsigned char tmp[512], isid_buf[32]; | |
1873 | ssize_t len = 0; | |
1874 | int reg_count = 0; | |
3c8a6228 | 1875 | int ret = 0; |
c66ac9db | 1876 | |
3c8a6228 AG |
1877 | spin_lock(&dev->dev_reservation_lock); |
1878 | spin_lock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1879 | /* |
1880 | * Walk the registration list.. | |
1881 | */ | |
0fd97ccf | 1882 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
c66ac9db NB |
1883 | pr_reg_list) { |
1884 | ||
1885 | tmp[0] = '\0'; | |
1886 | isid_buf[0] = '\0'; | |
1887 | tpg = pr_reg->pr_reg_nacl->se_tpg; | |
c66ac9db NB |
1888 | /* |
1889 | * Write out any ISID value to APTPL metadata that was included | |
1890 | * in the original registration. | |
1891 | */ | |
1892 | if (pr_reg->isid_present_at_reg) | |
1893 | snprintf(isid_buf, 32, "initiator_sid=%s\n", | |
1894 | pr_reg->pr_reg_isid); | |
1895 | /* | |
1896 | * Include special metadata if the pr_reg matches the | |
1897 | * reservation holder. | |
1898 | */ | |
1899 | if (dev->dev_pr_res_holder == pr_reg) { | |
1900 | snprintf(tmp, 512, "PR_REG_START: %d" | |
1901 | "\ninitiator_fabric=%s\n" | |
1902 | "initiator_node=%s\n%s" | |
1903 | "sa_res_key=%llu\n" | |
1904 | "res_holder=1\nres_type=%02x\n" | |
1905 | "res_scope=%02x\nres_all_tg_pt=%d\n" | |
f2d30680 | 1906 | "mapped_lun=%llu\n", reg_count, |
30c7ca93 | 1907 | tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
1908 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1909 | pr_reg->pr_res_key, pr_reg->pr_res_type, | |
1910 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, | |
1911 | pr_reg->pr_res_mapped_lun); | |
1912 | } else { | |
1913 | snprintf(tmp, 512, "PR_REG_START: %d\n" | |
1914 | "initiator_fabric=%s\ninitiator_node=%s\n%s" | |
1915 | "sa_res_key=%llu\nres_holder=0\n" | |
f2d30680 | 1916 | "res_all_tg_pt=%d\nmapped_lun=%llu\n", |
30c7ca93 | 1917 | reg_count, tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
1918 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
1919 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, | |
1920 | pr_reg->pr_res_mapped_lun); | |
1921 | } | |
1922 | ||
60d645a4 | 1923 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1924 | pr_err("Unable to update renaming APTPL metadata," |
1925 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1926 | ret = -EMSGSIZE; |
1927 | goto out; | |
c66ac9db NB |
1928 | } |
1929 | len += sprintf(buf+len, "%s", tmp); | |
1930 | ||
1931 | /* | |
1932 | * Include information about the associated SCSI target port. | |
1933 | */ | |
1934 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" | |
f2d30680 | 1935 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%llu\nPR_REG_END:" |
30c7ca93 | 1936 | " %d\n", tpg->se_tpg_tfo->fabric_name, |
e3d6f909 AG |
1937 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
1938 | tpg->se_tpg_tfo->tpg_get_tag(tpg), | |
79dc9c9e NB |
1939 | pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun, |
1940 | reg_count); | |
c66ac9db | 1941 | |
60d645a4 | 1942 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
f161d4b4 NB |
1943 | pr_err("Unable to update renaming APTPL metadata," |
1944 | " reallocating larger buffer\n"); | |
3c8a6228 AG |
1945 | ret = -EMSGSIZE; |
1946 | goto out; | |
c66ac9db NB |
1947 | } |
1948 | len += sprintf(buf+len, "%s", tmp); | |
1949 | reg_count++; | |
1950 | } | |
c66ac9db | 1951 | |
6708bb27 | 1952 | if (!reg_count) |
c66ac9db NB |
1953 | len += sprintf(buf+len, "No Registrations or Reservations"); |
1954 | ||
3c8a6228 AG |
1955 | out: |
1956 | spin_unlock(&dev->t10_pr.registration_lock); | |
c66ac9db NB |
1957 | spin_unlock(&dev->dev_reservation_lock); |
1958 | ||
1959 | return ret; | |
1960 | } | |
1961 | ||
c66ac9db NB |
1962 | static int __core_scsi3_write_aptpl_to_file( |
1963 | struct se_device *dev, | |
4dee96fb | 1964 | unsigned char *buf) |
c66ac9db | 1965 | { |
0fd97ccf | 1966 | struct t10_wwn *wwn = &dev->t10_wwn; |
c66ac9db | 1967 | struct file *file; |
c66ac9db | 1968 | int flags = O_RDWR | O_CREAT | O_TRUNC; |
bdc79f0e | 1969 | char *path; |
4dee96fb | 1970 | u32 pr_aptpl_buf_len; |
c66ac9db | 1971 | int ret; |
e13ec939 | 1972 | loff_t pos = 0; |
c66ac9db | 1973 | |
bdc79f0e DD |
1974 | path = kasprintf(GFP_KERNEL, "%s/pr/aptpl_%s", db_root, |
1975 | &wwn->unit_serial[0]); | |
1976 | if (!path) | |
1977 | return -ENOMEM; | |
c66ac9db | 1978 | |
c66ac9db | 1979 | file = filp_open(path, flags, 0600); |
0e9b10a9 | 1980 | if (IS_ERR(file)) { |
6708bb27 | 1981 | pr_err("filp_open(%s) for APTPL metadata" |
c66ac9db | 1982 | " failed\n", path); |
bdc79f0e | 1983 | kfree(path); |
0e9b10a9 | 1984 | return PTR_ERR(file); |
c66ac9db NB |
1985 | } |
1986 | ||
4dee96fb | 1987 | pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ |
c66ac9db | 1988 | |
e13ec939 | 1989 | ret = kernel_write(file, buf, pr_aptpl_buf_len, &pos); |
c66ac9db | 1990 | |
0e9b10a9 | 1991 | if (ret < 0) |
6708bb27 | 1992 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
0e9b10a9 | 1993 | fput(file); |
bdc79f0e | 1994 | kfree(path); |
c66ac9db | 1995 | |
f730f915 | 1996 | return (ret < 0) ? -EIO : 0; |
c66ac9db NB |
1997 | } |
1998 | ||
459f213b AG |
1999 | /* |
2000 | * Clear the APTPL metadata if APTPL has been disabled, otherwise | |
2001 | * write out the updated metadata to struct file for this SCSI device. | |
2002 | */ | |
8a391857 | 2003 | static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) |
c66ac9db | 2004 | { |
8a391857 | 2005 | unsigned char *buf; |
f161d4b4 | 2006 | int rc, len = PR_APTPL_BUF_LEN; |
de103c93 | 2007 | |
459f213b AG |
2008 | if (!aptpl) { |
2009 | char *null_buf = "No Registrations or Reservations\n"; | |
2010 | ||
8a391857 | 2011 | rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); |
459f213b AG |
2012 | dev->t10_pr.pr_aptpl_active = 0; |
2013 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); | |
459f213b | 2014 | |
8a391857 NB |
2015 | if (rc) |
2016 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
459f213b | 2017 | |
8a391857 NB |
2018 | return 0; |
2019 | } | |
f161d4b4 NB |
2020 | retry: |
2021 | buf = vzalloc(len); | |
8a391857 NB |
2022 | if (!buf) |
2023 | return TCM_OUT_OF_RESOURCES; | |
2024 | ||
f161d4b4 | 2025 | rc = core_scsi3_update_aptpl_buf(dev, buf, len); |
8a391857 | 2026 | if (rc < 0) { |
f161d4b4 NB |
2027 | vfree(buf); |
2028 | len *= 2; | |
2029 | goto retry; | |
c66ac9db NB |
2030 | } |
2031 | ||
8a391857 NB |
2032 | rc = __core_scsi3_write_aptpl_to_file(dev, buf); |
2033 | if (rc != 0) { | |
2034 | pr_err("SPC-3 PR: Could not update APTPL\n"); | |
f161d4b4 | 2035 | vfree(buf); |
8a391857 NB |
2036 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2037 | } | |
2038 | dev->t10_pr.pr_aptpl_active = 1; | |
f161d4b4 | 2039 | vfree(buf); |
8a391857 NB |
2040 | pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); |
2041 | return 0; | |
c66ac9db NB |
2042 | } |
2043 | ||
de103c93 CH |
2044 | static sense_reason_t |
2045 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, | |
bc118fe4 | 2046 | bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) |
c66ac9db | 2047 | { |
e3d6f909 | 2048 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 2049 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2050 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2051 | struct se_portal_group *se_tpg; |
bc118fe4 | 2052 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; |
0fd97ccf | 2053 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2054 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
a0d50f62 | 2055 | sense_reason_t ret = TCM_NO_SENSE; |
fc09149d | 2056 | int pr_holder = 0, type; |
c66ac9db | 2057 | |
6708bb27 AG |
2058 | if (!se_sess || !se_lun) { |
2059 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2060 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2061 | } |
2062 | se_tpg = se_sess->se_tpg; | |
c66ac9db | 2063 | |
e3d6f909 | 2064 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
c66ac9db | 2065 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 2066 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
c66ac9db NB |
2067 | PR_REG_ISID_LEN); |
2068 | isid_ptr = &isid_buf[0]; | |
2069 | } | |
2070 | /* | |
2071 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 | |
2072 | */ | |
bc118fe4 AG |
2073 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
2074 | if (!pr_reg) { | |
c66ac9db | 2075 | if (res_key) { |
6708bb27 | 2076 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
c66ac9db | 2077 | " for SA REGISTER, returning CONFLICT\n"); |
de103c93 | 2078 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2079 | } |
2080 | /* | |
2081 | * Do nothing but return GOOD status. | |
2082 | */ | |
6708bb27 | 2083 | if (!sa_res_key) |
03e98c9e | 2084 | return 0; |
c66ac9db | 2085 | |
6708bb27 | 2086 | if (!spec_i_pt) { |
c66ac9db NB |
2087 | /* |
2088 | * Perform the Service Action REGISTER on the Initiator | |
2089 | * Port Endpoint that the PRO was received from on the | |
2090 | * Logical Unit of the SCSI device server. | |
2091 | */ | |
de103c93 | 2092 | if (core_scsi3_alloc_registration(cmd->se_dev, |
79dc9c9e NB |
2093 | se_sess->se_node_acl, cmd->se_lun, |
2094 | NULL, cmd->orig_fe_lun, isid_ptr, | |
c66ac9db | 2095 | sa_res_key, all_tg_pt, aptpl, |
33ce6a87 | 2096 | register_type, 0)) { |
6708bb27 | 2097 | pr_err("Unable to allocate" |
c66ac9db | 2098 | " struct t10_pr_registration\n"); |
79dd6f2f | 2099 | return TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
c66ac9db NB |
2100 | } |
2101 | } else { | |
2102 | /* | |
2103 | * Register both the Initiator port that received | |
2104 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI | |
2105 | * TransportID from Parameter list and loop through | |
2106 | * fabric dependent parameter list while calling | |
2107 | * logic from of core_scsi3_alloc_registration() for | |
2108 | * each TransportID provided SCSI Initiator Port/Device | |
2109 | */ | |
2110 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, | |
2111 | isid_ptr, sa_res_key, all_tg_pt, aptpl); | |
2112 | if (ret != 0) | |
2113 | return ret; | |
2114 | } | |
459f213b | 2115 | return core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 CH |
2116 | } |
2117 | ||
bc118fe4 AG |
2118 | /* ok, existing registration */ |
2119 | ||
2120 | if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { | |
2121 | pr_err("SPC-3 PR REGISTER: Received" | |
2122 | " res_key: 0x%016Lx does not match" | |
2123 | " existing SA REGISTER res_key:" | |
2124 | " 0x%016Lx\n", res_key, | |
2125 | pr_reg->pr_res_key); | |
2126 | ret = TCM_RESERVATION_CONFLICT; | |
2127 | goto out; | |
de103c93 CH |
2128 | } |
2129 | ||
2130 | if (spec_i_pt) { | |
1f070cc2 AG |
2131 | pr_err("SPC-3 PR REGISTER: SPEC_I_PT" |
2132 | " set on a registered nexus\n"); | |
de103c93 | 2133 | ret = TCM_INVALID_PARAMETER_LIST; |
bc118fe4 | 2134 | goto out; |
de103c93 CH |
2135 | } |
2136 | ||
2137 | /* | |
2138 | * An existing ALL_TG_PT=1 registration being released | |
2139 | * must also set ALL_TG_PT=1 in the incoming PROUT. | |
2140 | */ | |
1f070cc2 AG |
2141 | if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { |
2142 | pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" | |
de103c93 CH |
2143 | " registration exists, but ALL_TG_PT=1 bit not" |
2144 | " present in received PROUT\n"); | |
2145 | ret = TCM_INVALID_CDB_FIELD; | |
bc118fe4 | 2146 | goto out; |
de103c93 CH |
2147 | } |
2148 | ||
de103c93 | 2149 | /* |
51d9c41d | 2150 | * sa_res_key=1 Change Reservation Key for registered I_T Nexus. |
de103c93 | 2151 | */ |
51d9c41d AG |
2152 | if (sa_res_key) { |
2153 | /* | |
2154 | * Increment PRgeneration counter for struct se_device" | |
2155 | * upon a successful REGISTER, see spc4r17 section 6.3.2 | |
2156 | * READ_KEYS service action. | |
2157 | */ | |
2158 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); | |
2159 | pr_reg->pr_res_key = sa_res_key; | |
2160 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" | |
2161 | " Key for %s to: 0x%016Lx PRgeneration:" | |
30c7ca93 | 2162 | " 0x%08x\n", cmd->se_tfo->fabric_name, |
51d9c41d AG |
2163 | (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", |
2164 | pr_reg->pr_reg_nacl->initiatorname, | |
2165 | pr_reg->pr_res_key, pr_reg->pr_res_generation); | |
2166 | ||
2167 | } else { | |
2168 | /* | |
2169 | * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. | |
2170 | */ | |
6c3c9baa NB |
2171 | type = pr_reg->pr_res_type; |
2172 | pr_holder = core_scsi3_check_implicit_release(cmd->se_dev, | |
2173 | pr_reg); | |
de103c93 | 2174 | if (pr_holder < 0) { |
de103c93 | 2175 | ret = TCM_RESERVATION_CONFLICT; |
bc118fe4 | 2176 | goto out; |
c66ac9db | 2177 | } |
de103c93 CH |
2178 | |
2179 | spin_lock(&pr_tmpl->registration_lock); | |
c66ac9db | 2180 | /* |
de103c93 CH |
2181 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
2182 | * and matching pr_res_key. | |
c66ac9db | 2183 | */ |
de103c93 CH |
2184 | if (pr_reg->pr_reg_all_tg_pt) { |
2185 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, | |
2186 | &pr_tmpl->registration_list, | |
2187 | pr_reg_list) { | |
2188 | ||
2189 | if (!pr_reg_p->pr_reg_all_tg_pt) | |
2190 | continue; | |
2191 | if (pr_reg_p->pr_res_key != res_key) | |
2192 | continue; | |
2193 | if (pr_reg == pr_reg_p) | |
2194 | continue; | |
2195 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, | |
2196 | pr_reg_p->pr_reg_nacl->initiatorname)) | |
2197 | continue; | |
2198 | ||
2199 | __core_scsi3_free_registration(dev, | |
2200 | pr_reg_p, NULL, 0); | |
c66ac9db NB |
2201 | } |
2202 | } | |
de103c93 | 2203 | |
c66ac9db | 2204 | /* |
de103c93 | 2205 | * Release the calling I_T Nexus registration now.. |
c66ac9db | 2206 | */ |
de103c93 | 2207 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
fc09149d | 2208 | pr_reg = NULL; |
c66ac9db | 2209 | |
de103c93 CH |
2210 | /* |
2211 | * From spc4r17, section 5.7.11.3 Unregistering | |
2212 | * | |
2213 | * If the persistent reservation is a registrants only | |
2214 | * type, the device server shall establish a unit | |
2215 | * attention condition for the initiator port associated | |
2216 | * with every registered I_T nexus except for the I_T | |
2217 | * nexus on which the PERSISTENT RESERVE OUT command was | |
2218 | * received, with the additional sense code set to | |
2219 | * RESERVATIONS RELEASED. | |
2220 | */ | |
2221 | if (pr_holder && | |
fc09149d NB |
2222 | (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || |
2223 | type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { | |
de103c93 CH |
2224 | list_for_each_entry(pr_reg_p, |
2225 | &pr_tmpl->registration_list, | |
2226 | pr_reg_list) { | |
2227 | ||
c51c8e7b | 2228 | target_ua_allocate_lun( |
de103c93 CH |
2229 | pr_reg_p->pr_reg_nacl, |
2230 | pr_reg_p->pr_res_mapped_lun, | |
2231 | 0x2A, | |
2232 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
c66ac9db | 2233 | } |
de103c93 | 2234 | } |
c66ac9db | 2235 | |
51d9c41d | 2236 | spin_unlock(&pr_tmpl->registration_lock); |
de103c93 | 2237 | } |
c66ac9db | 2238 | |
459f213b | 2239 | ret = core_scsi3_update_and_write_aptpl(dev, aptpl); |
de103c93 | 2240 | |
bc118fe4 | 2241 | out: |
fc09149d NB |
2242 | if (pr_reg) |
2243 | core_scsi3_put_pr_reg(pr_reg); | |
de103c93 | 2244 | return ret; |
c66ac9db NB |
2245 | } |
2246 | ||
2247 | unsigned char *core_scsi3_pr_dump_type(int type) | |
2248 | { | |
2249 | switch (type) { | |
2250 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2251 | return "Write Exclusive Access"; | |
2252 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2253 | return "Exclusive Access"; | |
2254 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2255 | return "Write Exclusive Access, Registrants Only"; | |
2256 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2257 | return "Exclusive Access, Registrants Only"; | |
2258 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2259 | return "Write Exclusive Access, All Registrants"; | |
2260 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
2261 | return "Exclusive Access, All Registrants"; | |
2262 | default: | |
2263 | break; | |
2264 | } | |
2265 | ||
2266 | return "Unknown SPC-3 PR Type"; | |
2267 | } | |
2268 | ||
de103c93 CH |
2269 | static sense_reason_t |
2270 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) | |
c66ac9db | 2271 | { |
de103c93 | 2272 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 2273 | struct se_session *se_sess = cmd->se_sess; |
e3d6f909 | 2274 | struct se_lun *se_lun = cmd->se_lun; |
c66ac9db | 2275 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
0fd97ccf | 2276 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2277 | char i_buf[PR_REG_ISID_ID_LEN]; |
de103c93 | 2278 | sense_reason_t ret; |
c66ac9db NB |
2279 | |
2280 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); | |
2281 | ||
6708bb27 AG |
2282 | if (!se_sess || !se_lun) { |
2283 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2284 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2285 | } |
c66ac9db NB |
2286 | /* |
2287 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2288 | */ | |
5951146d | 2289 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2290 | se_sess); |
6708bb27 AG |
2291 | if (!pr_reg) { |
2292 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2293 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
de103c93 | 2294 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2295 | } |
2296 | /* | |
2297 | * From spc4r17 Section 5.7.9: Reserving: | |
2298 | * | |
2299 | * An application client creates a persistent reservation by issuing | |
2300 | * a PERSISTENT RESERVE OUT command with RESERVE service action through | |
2301 | * a registered I_T nexus with the following parameters: | |
2302 | * a) RESERVATION KEY set to the value of the reservation key that is | |
2303 | * registered with the logical unit for the I_T nexus; and | |
2304 | */ | |
2305 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2306 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2307 | " does not match existing SA REGISTER res_key:" |
2308 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
2309 | ret = TCM_RESERVATION_CONFLICT; |
2310 | goto out_put_pr_reg; | |
c66ac9db NB |
2311 | } |
2312 | /* | |
2313 | * From spc4r17 Section 5.7.9: Reserving: | |
2314 | * | |
2315 | * From above: | |
2316 | * b) TYPE field and SCOPE field set to the persistent reservation | |
2317 | * being created. | |
2318 | * | |
2319 | * Only one persistent reservation is allowed at a time per logical unit | |
2320 | * and that persistent reservation has a scope of LU_SCOPE. | |
2321 | */ | |
2322 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2323 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
de103c93 CH |
2324 | ret = TCM_INVALID_PARAMETER_LIST; |
2325 | goto out_put_pr_reg; | |
c66ac9db NB |
2326 | } |
2327 | /* | |
2328 | * See if we have an existing PR reservation holder pointer at | |
2329 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration | |
2330 | * *pr_res_holder. | |
2331 | */ | |
2332 | spin_lock(&dev->dev_reservation_lock); | |
2333 | pr_res_holder = dev->dev_pr_res_holder; | |
ee1b1b9c | 2334 | if (pr_res_holder) { |
c66ac9db NB |
2335 | /* |
2336 | * From spc4r17 Section 5.7.9: Reserving: | |
2337 | * | |
2338 | * If the device server receives a PERSISTENT RESERVE OUT | |
2339 | * command from an I_T nexus other than a persistent reservation | |
2340 | * holder (see 5.7.10) that attempts to create a persistent | |
2341 | * reservation when a persistent reservation already exists for | |
2342 | * the logical unit, then the command shall be completed with | |
2343 | * RESERVATION CONFLICT status. | |
2344 | */ | |
e673dc92 | 2345 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2346 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
6708bb27 | 2347 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2348 | " [%s]: %s while reservation already held by" |
2349 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
30c7ca93 | 2350 | cmd->se_tfo->fabric_name, |
c66ac9db | 2351 | se_sess->se_node_acl->initiatorname, |
30c7ca93 | 2352 | pr_res_nacl->se_tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
2353 | pr_res_holder->pr_reg_nacl->initiatorname); |
2354 | ||
2355 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2356 | ret = TCM_RESERVATION_CONFLICT; |
2357 | goto out_put_pr_reg; | |
c66ac9db NB |
2358 | } |
2359 | /* | |
2360 | * From spc4r17 Section 5.7.9: Reserving: | |
2361 | * | |
2362 | * If a persistent reservation holder attempts to modify the | |
2363 | * type or scope of an existing persistent reservation, the | |
2364 | * command shall be completed with RESERVATION CONFLICT status. | |
2365 | */ | |
2366 | if ((pr_res_holder->pr_res_type != type) || | |
2367 | (pr_res_holder->pr_res_scope != scope)) { | |
2368 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2369 | pr_err("SPC-3 PR: Attempted RESERVE from" |
c66ac9db NB |
2370 | " [%s]: %s trying to change TYPE and/or SCOPE," |
2371 | " while reservation already held by [%s]: %s," | |
2372 | " returning RESERVATION_CONFLICT\n", | |
30c7ca93 | 2373 | cmd->se_tfo->fabric_name, |
c66ac9db | 2374 | se_sess->se_node_acl->initiatorname, |
30c7ca93 | 2375 | pr_res_nacl->se_tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
2376 | pr_res_holder->pr_reg_nacl->initiatorname); |
2377 | ||
2378 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2379 | ret = TCM_RESERVATION_CONFLICT; |
2380 | goto out_put_pr_reg; | |
c66ac9db NB |
2381 | } |
2382 | /* | |
2383 | * From spc4r17 Section 5.7.9: Reserving: | |
2384 | * | |
2385 | * If the device server receives a PERSISTENT RESERVE OUT | |
2386 | * command with RESERVE service action where the TYPE field and | |
2387 | * the SCOPE field contain the same values as the existing type | |
2388 | * and scope from a persistent reservation holder, it shall not | |
2389 | * make any change to the existing persistent reservation and | |
2390 | * shall completethe command with GOOD status. | |
2391 | */ | |
2392 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2393 | ret = 0; |
2394 | goto out_put_pr_reg; | |
c66ac9db NB |
2395 | } |
2396 | /* | |
2397 | * Otherwise, our *pr_reg becomes the PR reservation holder for said | |
2398 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. | |
2399 | */ | |
2400 | pr_reg->pr_res_scope = scope; | |
2401 | pr_reg->pr_res_type = type; | |
2402 | pr_reg->pr_res_holder = 1; | |
2403 | dev->dev_pr_res_holder = pr_reg; | |
d2843c17 | 2404 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2405 | |
6708bb27 | 2406 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
c66ac9db | 2407 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
30c7ca93 | 2408 | cmd->se_tfo->fabric_name, core_scsi3_pr_dump_type(type), |
c66ac9db | 2409 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
6708bb27 | 2410 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
30c7ca93 | 2411 | cmd->se_tfo->fabric_name, |
c66ac9db | 2412 | se_sess->se_node_acl->initiatorname, |
d2843c17 | 2413 | i_buf); |
c66ac9db NB |
2414 | spin_unlock(&dev->dev_reservation_lock); |
2415 | ||
459f213b AG |
2416 | if (pr_tmpl->pr_aptpl_active) |
2417 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db | 2418 | |
de103c93 CH |
2419 | ret = 0; |
2420 | out_put_pr_reg: | |
c66ac9db | 2421 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2422 | return ret; |
c66ac9db NB |
2423 | } |
2424 | ||
de103c93 CH |
2425 | static sense_reason_t |
2426 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, | |
2427 | u64 res_key) | |
c66ac9db | 2428 | { |
c66ac9db NB |
2429 | switch (type) { |
2430 | case PR_TYPE_WRITE_EXCLUSIVE: | |
2431 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
2432 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
2433 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
2434 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
2435 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 2436 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
c66ac9db | 2437 | default: |
6708bb27 | 2438 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
c66ac9db | 2439 | " 0x%02x\n", type); |
de103c93 | 2440 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 2441 | } |
c66ac9db NB |
2442 | } |
2443 | ||
c66ac9db NB |
2444 | static void __core_scsi3_complete_pro_release( |
2445 | struct se_device *dev, | |
2446 | struct se_node_acl *se_nacl, | |
2447 | struct t10_pr_registration *pr_reg, | |
6c3c9baa NB |
2448 | int explicit, |
2449 | int unreg) | |
c66ac9db | 2450 | { |
9ac8928e | 2451 | const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2452 | char i_buf[PR_REG_ISID_ID_LEN]; |
6c3c9baa | 2453 | int pr_res_type = 0, pr_res_scope = 0; |
c66ac9db | 2454 | |
618baaf7 BVA |
2455 | lockdep_assert_held(&dev->dev_reservation_lock); |
2456 | ||
c66ac9db | 2457 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
d2843c17 | 2458 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
2459 | /* |
2460 | * Go ahead and release the current PR reservation holder. | |
6c3c9baa NB |
2461 | * If an All Registrants reservation is currently active and |
2462 | * a unregister operation is requested, replace the current | |
2463 | * dev_pr_res_holder with another active registration. | |
2464 | */ | |
2465 | if (dev->dev_pr_res_holder) { | |
2466 | pr_res_type = dev->dev_pr_res_holder->pr_res_type; | |
2467 | pr_res_scope = dev->dev_pr_res_holder->pr_res_scope; | |
2468 | dev->dev_pr_res_holder->pr_res_type = 0; | |
2469 | dev->dev_pr_res_holder->pr_res_scope = 0; | |
2470 | dev->dev_pr_res_holder->pr_res_holder = 0; | |
2471 | dev->dev_pr_res_holder = NULL; | |
2472 | } | |
2473 | if (!unreg) | |
2474 | goto out; | |
c66ac9db | 2475 | |
6c3c9baa NB |
2476 | spin_lock(&dev->t10_pr.registration_lock); |
2477 | list_del_init(&pr_reg->pr_reg_list); | |
2478 | /* | |
2479 | * If the I_T nexus is a reservation holder, the persistent reservation | |
2480 | * is of an all registrants type, and the I_T nexus is the last remaining | |
2481 | * registered I_T nexus, then the device server shall also release the | |
2482 | * persistent reservation. | |
2483 | */ | |
2484 | if (!list_empty(&dev->t10_pr.registration_list) && | |
2485 | ((pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2486 | (pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) { | |
2487 | dev->dev_pr_res_holder = | |
2488 | list_entry(dev->t10_pr.registration_list.next, | |
2489 | struct t10_pr_registration, pr_reg_list); | |
2490 | dev->dev_pr_res_holder->pr_res_type = pr_res_type; | |
2491 | dev->dev_pr_res_holder->pr_res_scope = pr_res_scope; | |
2492 | dev->dev_pr_res_holder->pr_res_holder = 1; | |
2493 | } | |
2494 | spin_unlock(&dev->t10_pr.registration_lock); | |
2495 | out: | |
2496 | if (!dev->dev_pr_res_holder) { | |
2497 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" | |
2498 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", | |
30c7ca93 | 2499 | tfo->fabric_name, (explicit) ? "explicit" : |
6c3c9baa NB |
2500 | "implicit", core_scsi3_pr_dump_type(pr_res_type), |
2501 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
2502 | } | |
6708bb27 | 2503 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
30c7ca93 | 2504 | tfo->fabric_name, se_nacl->initiatorname, |
d2843c17 | 2505 | i_buf); |
c66ac9db NB |
2506 | /* |
2507 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE | |
2508 | */ | |
2509 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; | |
2510 | } | |
2511 | ||
de103c93 CH |
2512 | static sense_reason_t |
2513 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, | |
2514 | u64 res_key) | |
c66ac9db NB |
2515 | { |
2516 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 AG |
2517 | struct se_session *se_sess = cmd->se_sess; |
2518 | struct se_lun *se_lun = cmd->se_lun; | |
c66ac9db | 2519 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
0fd97ccf | 2520 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
de103c93 | 2521 | sense_reason_t ret = 0; |
c66ac9db | 2522 | |
6708bb27 AG |
2523 | if (!se_sess || !se_lun) { |
2524 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 2525 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2526 | } |
2527 | /* | |
2528 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2529 | */ | |
2530 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); | |
6708bb27 AG |
2531 | if (!pr_reg) { |
2532 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2533 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
de103c93 | 2534 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2535 | } |
2536 | /* | |
2537 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2538 | * | |
2539 | * If there is no persistent reservation or in response to a persistent | |
2540 | * reservation release request from a registered I_T nexus that is not a | |
2541 | * persistent reservation holder (see 5.7.10), the device server shall | |
2542 | * do the following: | |
2543 | * | |
2544 | * a) Not release the persistent reservation, if any; | |
2545 | * b) Not remove any registrations; and | |
2546 | * c) Complete the command with GOOD status. | |
2547 | */ | |
2548 | spin_lock(&dev->dev_reservation_lock); | |
2549 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 | 2550 | if (!pr_res_holder) { |
c66ac9db NB |
2551 | /* |
2552 | * No persistent reservation, return GOOD status. | |
2553 | */ | |
2554 | spin_unlock(&dev->dev_reservation_lock); | |
bb7a8c8e | 2555 | goto out_put_pr_reg; |
c66ac9db | 2556 | } |
c66ac9db | 2557 | |
e673dc92 | 2558 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
c66ac9db | 2559 | /* |
c66ac9db NB |
2560 | * Release request from a registered I_T nexus that is not a |
2561 | * persistent reservation holder. return GOOD status. | |
2562 | */ | |
2563 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 2564 | goto out_put_pr_reg; |
c66ac9db | 2565 | } |
de103c93 | 2566 | |
c66ac9db NB |
2567 | /* |
2568 | * From spc4r17 Section 5.7.11.2 Releasing: | |
2569 | * | |
2570 | * Only the persistent reservation holder (see 5.7.10) is allowed to | |
2571 | * release a persistent reservation. | |
2572 | * | |
2573 | * An application client releases the persistent reservation by issuing | |
2574 | * a PERSISTENT RESERVE OUT command with RELEASE service action through | |
2575 | * an I_T nexus that is a persistent reservation holder with the | |
2576 | * following parameters: | |
2577 | * | |
2578 | * a) RESERVATION KEY field set to the value of the reservation key | |
2579 | * that is registered with the logical unit for the I_T nexus; | |
2580 | */ | |
2581 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 2582 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
c66ac9db NB |
2583 | " does not match existing SA REGISTER res_key:" |
2584 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
2585 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2586 | ret = TCM_RESERVATION_CONFLICT; |
2587 | goto out_put_pr_reg; | |
c66ac9db NB |
2588 | } |
2589 | /* | |
2590 | * From spc4r17 Section 5.7.11.2 Releasing and above: | |
2591 | * | |
2592 | * b) TYPE field and SCOPE field set to match the persistent | |
2593 | * reservation being released. | |
2594 | */ | |
2595 | if ((pr_res_holder->pr_res_type != type) || | |
2596 | (pr_res_holder->pr_res_scope != scope)) { | |
2597 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
6708bb27 | 2598 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
c66ac9db NB |
2599 | " reservation from [%s]: %s with different TYPE " |
2600 | "and/or SCOPE while reservation already held by" | |
2601 | " [%s]: %s, returning RESERVATION_CONFLICT\n", | |
30c7ca93 | 2602 | cmd->se_tfo->fabric_name, |
c66ac9db | 2603 | se_sess->se_node_acl->initiatorname, |
30c7ca93 | 2604 | pr_res_nacl->se_tpg->se_tpg_tfo->fabric_name, |
c66ac9db NB |
2605 | pr_res_holder->pr_reg_nacl->initiatorname); |
2606 | ||
2607 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 CH |
2608 | ret = TCM_RESERVATION_CONFLICT; |
2609 | goto out_put_pr_reg; | |
c66ac9db NB |
2610 | } |
2611 | /* | |
2612 | * In response to a persistent reservation release request from the | |
2613 | * persistent reservation holder the device server shall perform a | |
2614 | * release by doing the following as an uninterrupted series of actions: | |
2615 | * a) Release the persistent reservation; | |
2616 | * b) Not remove any registration(s); | |
2617 | * c) If the released persistent reservation is a registrants only type | |
2618 | * or all registrants type persistent reservation, | |
2619 | * the device server shall establish a unit attention condition for | |
2620 | * the initiator port associated with every regis- | |
2621 | * tered I_T nexus other than I_T nexus on which the PERSISTENT | |
2622 | * RESERVE OUT command with RELEASE service action was received, | |
2623 | * with the additional sense code set to RESERVATIONS RELEASED; and | |
2624 | * d) If the persistent reservation is of any other type, the device | |
2625 | * server shall not establish a unit attention condition. | |
2626 | */ | |
2627 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, | |
6c3c9baa | 2628 | pr_reg, 1, 0); |
c66ac9db NB |
2629 | |
2630 | spin_unlock(&dev->dev_reservation_lock); | |
2631 | ||
2632 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && | |
2633 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && | |
2634 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && | |
2635 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
2636 | /* | |
2637 | * If no UNIT ATTENTION conditions will be established for | |
2638 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS | |
2639 | * go ahead and check for APTPL=1 update+write below | |
2640 | */ | |
2641 | goto write_aptpl; | |
2642 | } | |
2643 | ||
2644 | spin_lock(&pr_tmpl->registration_lock); | |
2645 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, | |
2646 | pr_reg_list) { | |
2647 | /* | |
2648 | * Do not establish a UNIT ATTENTION condition | |
2649 | * for the calling I_T Nexus | |
2650 | */ | |
2651 | if (pr_reg_p == pr_reg) | |
2652 | continue; | |
2653 | ||
c51c8e7b | 2654 | target_ua_allocate_lun(pr_reg_p->pr_reg_nacl, |
c66ac9db NB |
2655 | pr_reg_p->pr_res_mapped_lun, |
2656 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); | |
2657 | } | |
2658 | spin_unlock(&pr_tmpl->registration_lock); | |
2659 | ||
2660 | write_aptpl: | |
459f213b AG |
2661 | if (pr_tmpl->pr_aptpl_active) |
2662 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
2663 | ||
de103c93 | 2664 | out_put_pr_reg: |
c66ac9db | 2665 | core_scsi3_put_pr_reg(pr_reg); |
de103c93 | 2666 | return ret; |
c66ac9db NB |
2667 | } |
2668 | ||
de103c93 CH |
2669 | static sense_reason_t |
2670 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) | |
c66ac9db NB |
2671 | { |
2672 | struct se_device *dev = cmd->se_dev; | |
2673 | struct se_node_acl *pr_reg_nacl; | |
e3d6f909 | 2674 | struct se_session *se_sess = cmd->se_sess; |
0fd97ccf | 2675 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
c66ac9db | 2676 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
f2d30680 | 2677 | u64 pr_res_mapped_lun = 0; |
c66ac9db NB |
2678 | int calling_it_nexus = 0; |
2679 | /* | |
2680 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
2681 | */ | |
5951146d | 2682 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
c66ac9db | 2683 | se_sess->se_node_acl, se_sess); |
6708bb27 AG |
2684 | if (!pr_reg_n) { |
2685 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2686 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
de103c93 | 2687 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
2688 | } |
2689 | /* | |
2690 | * From spc4r17 section 5.7.11.6, Clearing: | |
2691 | * | |
2692 | * Any application client may release the persistent reservation and | |
2693 | * remove all registrations from a device server by issuing a | |
2694 | * PERSISTENT RESERVE OUT command with CLEAR service action through a | |
2695 | * registered I_T nexus with the following parameter: | |
2696 | * | |
2697 | * a) RESERVATION KEY field set to the value of the reservation key | |
2698 | * that is registered with the logical unit for the I_T nexus. | |
2699 | */ | |
2700 | if (res_key != pr_reg_n->pr_res_key) { | |
6708bb27 | 2701 | pr_err("SPC-3 PR REGISTER: Received" |
c66ac9db NB |
2702 | " res_key: 0x%016Lx does not match" |
2703 | " existing SA REGISTER res_key:" | |
2704 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); | |
2705 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2706 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2707 | } |
2708 | /* | |
2709 | * a) Release the persistent reservation, if any; | |
2710 | */ | |
2711 | spin_lock(&dev->dev_reservation_lock); | |
2712 | pr_res_holder = dev->dev_pr_res_holder; | |
2713 | if (pr_res_holder) { | |
2714 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
2715 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 2716 | pr_res_holder, 0, 0); |
c66ac9db NB |
2717 | } |
2718 | spin_unlock(&dev->dev_reservation_lock); | |
2719 | /* | |
2720 | * b) Remove all registration(s) (see spc4r17 5.7.7); | |
2721 | */ | |
2722 | spin_lock(&pr_tmpl->registration_lock); | |
2723 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2724 | &pr_tmpl->registration_list, pr_reg_list) { | |
2725 | ||
2726 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2727 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2728 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2729 | __core_scsi3_free_registration(dev, pr_reg, NULL, | |
2730 | calling_it_nexus); | |
2731 | /* | |
2732 | * e) Establish a unit attention condition for the initiator | |
2733 | * port associated with every registered I_T nexus other | |
2734 | * than the I_T nexus on which the PERSISTENT RESERVE OUT | |
2735 | * command with CLEAR service action was received, with the | |
2736 | * additional sense code set to RESERVATIONS PREEMPTED. | |
2737 | */ | |
6708bb27 | 2738 | if (!calling_it_nexus) |
c51c8e7b | 2739 | target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, |
c66ac9db NB |
2740 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); |
2741 | } | |
2742 | spin_unlock(&pr_tmpl->registration_lock); | |
2743 | ||
6708bb27 | 2744 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
30c7ca93 | 2745 | cmd->se_tfo->fabric_name); |
c66ac9db | 2746 | |
459f213b | 2747 | core_scsi3_update_and_write_aptpl(cmd->se_dev, false); |
c66ac9db NB |
2748 | |
2749 | core_scsi3_pr_generation(dev); | |
2750 | return 0; | |
2751 | } | |
2752 | ||
c66ac9db NB |
2753 | static void __core_scsi3_complete_pro_preempt( |
2754 | struct se_device *dev, | |
2755 | struct t10_pr_registration *pr_reg, | |
2756 | struct list_head *preempt_and_abort_list, | |
2757 | int type, | |
2758 | int scope, | |
33ce6a87 | 2759 | enum preempt_type preempt_type) |
c66ac9db NB |
2760 | { |
2761 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; | |
9ac8928e | 2762 | const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
c66ac9db | 2763 | char i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 2764 | |
618baaf7 BVA |
2765 | lockdep_assert_held(&dev->dev_reservation_lock); |
2766 | ||
c66ac9db | 2767 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
d2843c17 | 2768 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db | 2769 | /* |
125d0119 | 2770 | * Do an implicit RELEASE of the existing reservation. |
c66ac9db NB |
2771 | */ |
2772 | if (dev->dev_pr_res_holder) | |
2773 | __core_scsi3_complete_pro_release(dev, nacl, | |
6c3c9baa | 2774 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
2775 | |
2776 | dev->dev_pr_res_holder = pr_reg; | |
2777 | pr_reg->pr_res_holder = 1; | |
2778 | pr_reg->pr_res_type = type; | |
2779 | pr_reg->pr_res_scope = scope; | |
2780 | ||
6708bb27 | 2781 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
c66ac9db | 2782 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
30c7ca93 | 2783 | tfo->fabric_name, (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
c66ac9db NB |
2784 | core_scsi3_pr_dump_type(type), |
2785 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); | |
6708bb27 | 2786 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
30c7ca93 | 2787 | tfo->fabric_name, (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
d2843c17 | 2788 | nacl->initiatorname, i_buf); |
c66ac9db NB |
2789 | /* |
2790 | * For PREEMPT_AND_ABORT, add the preempting reservation's | |
2791 | * struct t10_pr_registration to the list that will be compared | |
2792 | * against received CDBs.. | |
2793 | */ | |
2794 | if (preempt_and_abort_list) | |
2795 | list_add_tail(&pr_reg->pr_reg_abort_list, | |
2796 | preempt_and_abort_list); | |
2797 | } | |
2798 | ||
2799 | static void core_scsi3_release_preempt_and_abort( | |
2800 | struct list_head *preempt_and_abort_list, | |
2801 | struct t10_pr_registration *pr_reg_holder) | |
2802 | { | |
2803 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
2804 | ||
2805 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, | |
2806 | pr_reg_abort_list) { | |
2807 | ||
2808 | list_del(&pr_reg->pr_reg_abort_list); | |
2809 | if (pr_reg_holder == pr_reg) | |
2810 | continue; | |
2811 | if (pr_reg->pr_res_holder) { | |
6708bb27 | 2812 | pr_warn("pr_reg->pr_res_holder still set\n"); |
c66ac9db NB |
2813 | continue; |
2814 | } | |
2815 | ||
2816 | pr_reg->pr_reg_deve = NULL; | |
2817 | pr_reg->pr_reg_nacl = NULL; | |
c66ac9db NB |
2818 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
2819 | } | |
2820 | } | |
2821 | ||
de103c93 CH |
2822 | static sense_reason_t |
2823 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, | |
33ce6a87 | 2824 | u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 2825 | { |
5951146d | 2826 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2827 | struct se_node_acl *pr_reg_nacl; |
e3d6f909 | 2828 | struct se_session *se_sess = cmd->se_sess; |
d0f474e5 | 2829 | LIST_HEAD(preempt_and_abort_list); |
c66ac9db | 2830 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
0fd97ccf | 2831 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
f2d30680 | 2832 | u64 pr_res_mapped_lun = 0; |
b6932ee3 SA |
2833 | int all_reg = 0, calling_it_nexus = 0; |
2834 | bool sa_res_key_unmatched = sa_res_key != 0; | |
de103c93 | 2835 | int prh_type = 0, prh_scope = 0; |
c66ac9db | 2836 | |
de103c93 CH |
2837 | if (!se_sess) |
2838 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2839 | |
5951146d | 2840 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 2841 | se_sess); |
6708bb27 AG |
2842 | if (!pr_reg_n) { |
2843 | pr_err("SPC-3 PR: Unable to locate" | |
c66ac9db | 2844 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
33ce6a87 | 2845 | (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); |
de103c93 | 2846 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2847 | } |
2848 | if (pr_reg_n->pr_res_key != res_key) { | |
2849 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2850 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2851 | } |
2852 | if (scope != PR_SCOPE_LU_SCOPE) { | |
6708bb27 | 2853 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
c66ac9db | 2854 | core_scsi3_put_pr_reg(pr_reg_n); |
de103c93 | 2855 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db | 2856 | } |
c66ac9db NB |
2857 | |
2858 | spin_lock(&dev->dev_reservation_lock); | |
2859 | pr_res_holder = dev->dev_pr_res_holder; | |
2860 | if (pr_res_holder && | |
2861 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
2862 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) | |
2863 | all_reg = 1; | |
2864 | ||
6708bb27 | 2865 | if (!all_reg && !sa_res_key) { |
c66ac9db NB |
2866 | spin_unlock(&dev->dev_reservation_lock); |
2867 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2868 | return TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
2869 | } |
2870 | /* | |
2871 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: | |
2872 | * | |
2873 | * If the SERVICE ACTION RESERVATION KEY field does not identify a | |
2874 | * persistent reservation holder or there is no persistent reservation | |
2875 | * holder (i.e., there is no persistent reservation), then the device | |
2876 | * server shall perform a preempt by doing the following in an | |
2877 | * uninterrupted series of actions. (See below..) | |
2878 | */ | |
6708bb27 | 2879 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
c66ac9db NB |
2880 | /* |
2881 | * No existing or SA Reservation Key matching reservations.. | |
2882 | * | |
2883 | * PROUT SA PREEMPT with All Registrant type reservations are | |
2884 | * allowed to be processed without a matching SA Reservation Key | |
2885 | */ | |
2886 | spin_lock(&pr_tmpl->registration_lock); | |
2887 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
2888 | &pr_tmpl->registration_list, pr_reg_list) { | |
2889 | /* | |
2890 | * Removing of registrations in non all registrants | |
2891 | * type reservations without a matching SA reservation | |
2892 | * key. | |
2893 | * | |
2894 | * a) Remove the registrations for all I_T nexuses | |
2895 | * specified by the SERVICE ACTION RESERVATION KEY | |
2896 | * field; | |
2897 | * b) Ignore the contents of the SCOPE and TYPE fields; | |
2898 | * c) Process tasks as defined in 5.7.1; and | |
2899 | * d) Establish a unit attention condition for the | |
2900 | * initiator port associated with every I_T nexus | |
2901 | * that lost its registration other than the I_T | |
2902 | * nexus on which the PERSISTENT RESERVE OUT command | |
2903 | * was received, with the additional sense code set | |
2904 | * to REGISTRATIONS PREEMPTED. | |
2905 | */ | |
6708bb27 | 2906 | if (!all_reg) { |
c66ac9db NB |
2907 | if (pr_reg->pr_res_key != sa_res_key) |
2908 | continue; | |
b6932ee3 | 2909 | sa_res_key_unmatched = false; |
c66ac9db NB |
2910 | |
2911 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2912 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2913 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2914 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2915 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2916 | NULL, calling_it_nexus); |
c66ac9db NB |
2917 | } else { |
2918 | /* | |
2919 | * Case for any existing all registrants type | |
2920 | * reservation, follow logic in spc4r17 section | |
2921 | * 5.7.11.4 Preempting, Table 52 and Figure 7. | |
2922 | * | |
2923 | * For a ZERO SA Reservation key, release | |
125d0119 | 2924 | * all other registrations and do an implicit |
c66ac9db NB |
2925 | * release of active persistent reservation. |
2926 | * | |
2927 | * For a non-ZERO SA Reservation key, only | |
2928 | * release the matching reservation key from | |
2929 | * registrations. | |
2930 | */ | |
2931 | if ((sa_res_key) && | |
2932 | (pr_reg->pr_res_key != sa_res_key)) | |
2933 | continue; | |
b6932ee3 | 2934 | sa_res_key_unmatched = false; |
c66ac9db NB |
2935 | |
2936 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
2937 | if (calling_it_nexus) | |
2938 | continue; | |
2939 | ||
2940 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
2941 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
2942 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 2943 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
c66ac9db | 2944 | NULL, 0); |
c66ac9db | 2945 | } |
6708bb27 | 2946 | if (!calling_it_nexus) |
c51c8e7b | 2947 | target_ua_allocate_lun(pr_reg_nacl, |
c66ac9db | 2948 | pr_res_mapped_lun, 0x2A, |
9e08e34e | 2949 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
2950 | } |
2951 | spin_unlock(&pr_tmpl->registration_lock); | |
2952 | /* | |
2953 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or | |
2954 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION | |
2955 | * RESERVATION KEY field to a value that does not match any | |
2956 | * registered reservation key, then the device server shall | |
2957 | * complete the command with RESERVATION CONFLICT status. | |
2958 | */ | |
b6932ee3 | 2959 | if (sa_res_key_unmatched) { |
c66ac9db NB |
2960 | spin_unlock(&dev->dev_reservation_lock); |
2961 | core_scsi3_put_pr_reg(pr_reg_n); | |
de103c93 | 2962 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
2963 | } |
2964 | /* | |
2965 | * For an existing all registrants type reservation | |
2966 | * with a zero SA rservation key, preempt the existing | |
2967 | * reservation with the new PR type and scope. | |
2968 | */ | |
2969 | if (pr_res_holder && all_reg && !(sa_res_key)) { | |
2970 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
2971 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
2972 | type, scope, preempt_type); | |
c66ac9db | 2973 | |
33ce6a87 | 2974 | if (preempt_type == PREEMPT_AND_ABORT) |
c66ac9db NB |
2975 | core_scsi3_release_preempt_and_abort( |
2976 | &preempt_and_abort_list, pr_reg_n); | |
2977 | } | |
2978 | spin_unlock(&dev->dev_reservation_lock); | |
2979 | ||
459f213b AG |
2980 | if (pr_tmpl->pr_aptpl_active) |
2981 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
2982 | |
2983 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 2984 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
2985 | return 0; |
2986 | } | |
2987 | /* | |
2988 | * The PREEMPTing SA reservation key matches that of the | |
2989 | * existing persistent reservation, first, we check if | |
2990 | * we are preempting our own reservation. | |
2991 | * From spc4r17, section 5.7.11.4.3 Preempting | |
2992 | * persistent reservations and registration handling | |
2993 | * | |
2994 | * If an all registrants persistent reservation is not | |
2995 | * present, it is not an error for the persistent | |
2996 | * reservation holder to preempt itself (i.e., a | |
2997 | * PERSISTENT RESERVE OUT with a PREEMPT service action | |
2998 | * or a PREEMPT AND ABORT service action with the | |
2999 | * SERVICE ACTION RESERVATION KEY value equal to the | |
3000 | * persistent reservation holder's reservation key that | |
3001 | * is received from the persistent reservation holder). | |
3002 | * In that case, the device server shall establish the | |
3003 | * new persistent reservation and maintain the | |
3004 | * registration. | |
3005 | */ | |
3006 | prh_type = pr_res_holder->pr_res_type; | |
3007 | prh_scope = pr_res_holder->pr_res_scope; | |
3008 | /* | |
3009 | * If the SERVICE ACTION RESERVATION KEY field identifies a | |
3010 | * persistent reservation holder (see 5.7.10), the device | |
3011 | * server shall perform a preempt by doing the following as | |
3012 | * an uninterrupted series of actions: | |
3013 | * | |
3014 | * a) Release the persistent reservation for the holder | |
3015 | * identified by the SERVICE ACTION RESERVATION KEY field; | |
3016 | */ | |
3017 | if (pr_reg_n != pr_res_holder) | |
3018 | __core_scsi3_complete_pro_release(dev, | |
6c3c9baa NB |
3019 | pr_res_holder->pr_reg_nacl, |
3020 | dev->dev_pr_res_holder, 0, 0); | |
c66ac9db NB |
3021 | /* |
3022 | * b) Remove the registrations for all I_T nexuses identified | |
3023 | * by the SERVICE ACTION RESERVATION KEY field, except the | |
3024 | * I_T nexus that is being used for the PERSISTENT RESERVE | |
3025 | * OUT command. If an all registrants persistent reservation | |
3026 | * is present and the SERVICE ACTION RESERVATION KEY field | |
3027 | * is set to zero, then all registrations shall be removed | |
3028 | * except for that of the I_T nexus that is being used for | |
3029 | * the PERSISTENT RESERVE OUT command; | |
3030 | */ | |
3031 | spin_lock(&pr_tmpl->registration_lock); | |
3032 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3033 | &pr_tmpl->registration_list, pr_reg_list) { | |
3034 | ||
3035 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3036 | if (calling_it_nexus) | |
3037 | continue; | |
3038 | ||
3039 | if (pr_reg->pr_res_key != sa_res_key) | |
3040 | continue; | |
3041 | ||
3042 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3043 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; | |
3044 | __core_scsi3_free_registration(dev, pr_reg, | |
33ce6a87 | 3045 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
c66ac9db NB |
3046 | calling_it_nexus); |
3047 | /* | |
3048 | * e) Establish a unit attention condition for the initiator | |
3049 | * port associated with every I_T nexus that lost its | |
3050 | * persistent reservation and/or registration, with the | |
3051 | * additional sense code set to REGISTRATIONS PREEMPTED; | |
3052 | */ | |
c51c8e7b | 3053 | target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A, |
9e08e34e | 3054 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
c66ac9db NB |
3055 | } |
3056 | spin_unlock(&pr_tmpl->registration_lock); | |
3057 | /* | |
3058 | * c) Establish a persistent reservation for the preempting | |
3059 | * I_T nexus using the contents of the SCOPE and TYPE fields; | |
3060 | */ | |
3061 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, | |
33ce6a87 AG |
3062 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
3063 | type, scope, preempt_type); | |
c66ac9db NB |
3064 | /* |
3065 | * d) Process tasks as defined in 5.7.1; | |
3066 | * e) See above.. | |
3067 | * f) If the type or scope has changed, then for every I_T nexus | |
3068 | * whose reservation key was not removed, except for the I_T | |
3069 | * nexus on which the PERSISTENT RESERVE OUT command was | |
3070 | * received, the device server shall establish a unit | |
3071 | * attention condition for the initiator port associated with | |
3072 | * that I_T nexus, with the additional sense code set to | |
3073 | * RESERVATIONS RELEASED. If the type or scope have not | |
3074 | * changed, then no unit attention condition(s) shall be | |
3075 | * established for this reason. | |
3076 | */ | |
3077 | if ((prh_type != type) || (prh_scope != scope)) { | |
3078 | spin_lock(&pr_tmpl->registration_lock); | |
3079 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3080 | &pr_tmpl->registration_list, pr_reg_list) { | |
3081 | ||
3082 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; | |
3083 | if (calling_it_nexus) | |
3084 | continue; | |
3085 | ||
c51c8e7b | 3086 | target_ua_allocate_lun(pr_reg->pr_reg_nacl, |
c66ac9db NB |
3087 | pr_reg->pr_res_mapped_lun, 0x2A, |
3088 | ASCQ_2AH_RESERVATIONS_RELEASED); | |
3089 | } | |
3090 | spin_unlock(&pr_tmpl->registration_lock); | |
3091 | } | |
3092 | spin_unlock(&dev->dev_reservation_lock); | |
3093 | /* | |
3094 | * Call LUN_RESET logic upon list of struct t10_pr_registration, | |
3095 | * All received CDBs for the matching existing reservation and | |
3096 | * registrations undergo ABORT_TASK logic. | |
3097 | * | |
3098 | * From there, core_scsi3_release_preempt_and_abort() will | |
3099 | * release every registration in the list (which have already | |
3100 | * been removed from the primary pr_reg list), except the | |
3101 | * new persistent reservation holder, the calling Initiator Port. | |
3102 | */ | |
33ce6a87 | 3103 | if (preempt_type == PREEMPT_AND_ABORT) { |
c66ac9db NB |
3104 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); |
3105 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, | |
3106 | pr_reg_n); | |
3107 | } | |
3108 | ||
459f213b AG |
3109 | if (pr_tmpl->pr_aptpl_active) |
3110 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); | |
c66ac9db NB |
3111 | |
3112 | core_scsi3_put_pr_reg(pr_reg_n); | |
5951146d | 3113 | core_scsi3_pr_generation(cmd->se_dev); |
c66ac9db NB |
3114 | return 0; |
3115 | } | |
3116 | ||
de103c93 CH |
3117 | static sense_reason_t |
3118 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, | |
33ce6a87 | 3119 | u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) |
c66ac9db | 3120 | { |
c66ac9db NB |
3121 | switch (type) { |
3122 | case PR_TYPE_WRITE_EXCLUSIVE: | |
3123 | case PR_TYPE_EXCLUSIVE_ACCESS: | |
3124 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: | |
3125 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: | |
3126 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: | |
3127 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: | |
de103c93 | 3128 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
33ce6a87 | 3129 | sa_res_key, preempt_type); |
c66ac9db | 3130 | default: |
6708bb27 | 3131 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
33ce6a87 | 3132 | " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); |
de103c93 | 3133 | return TCM_INVALID_CDB_FIELD; |
c66ac9db | 3134 | } |
c66ac9db NB |
3135 | } |
3136 | ||
3137 | ||
de103c93 CH |
3138 | static sense_reason_t |
3139 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, | |
3140 | u64 sa_res_key, int aptpl, int unreg) | |
c66ac9db | 3141 | { |
e3d6f909 | 3142 | struct se_session *se_sess = cmd->se_sess; |
5951146d | 3143 | struct se_device *dev = cmd->se_dev; |
28168905 | 3144 | struct se_dev_entry *dest_se_deve = NULL; |
adf653f9 | 3145 | struct se_lun *se_lun = cmd->se_lun, *tmp_lun; |
c66ac9db | 3146 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
c66ac9db | 3147 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; |
9ac8928e | 3148 | const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; |
c66ac9db | 3149 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; |
0fd97ccf | 3150 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3151 | unsigned char *buf; |
2650d71e | 3152 | const unsigned char *initiator_str; |
13ba564c | 3153 | char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN]; |
c66ac9db | 3154 | u32 tid_len, tmp_tid_len; |
d2843c17 | 3155 | int new_reg = 0, type, scope, matching_iname; |
de103c93 | 3156 | sense_reason_t ret; |
c66ac9db NB |
3157 | unsigned short rtpi; |
3158 | unsigned char proto_ident; | |
3159 | ||
6708bb27 AG |
3160 | if (!se_sess || !se_lun) { |
3161 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); | |
de103c93 | 3162 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 3163 | } |
de103c93 | 3164 | |
c66ac9db NB |
3165 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
3166 | se_tpg = se_sess->se_tpg; | |
e3d6f909 | 3167 | tf_ops = se_tpg->se_tpg_tfo; |
c66ac9db NB |
3168 | /* |
3169 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- | |
3170 | * Register behaviors for a REGISTER AND MOVE service action | |
3171 | * | |
3172 | * Locate the existing *pr_reg via struct se_node_acl pointers | |
3173 | */ | |
5951146d | 3174 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
c66ac9db | 3175 | se_sess); |
6708bb27 AG |
3176 | if (!pr_reg) { |
3177 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" | |
c66ac9db | 3178 | " *pr_reg for REGISTER_AND_MOVE\n"); |
de103c93 | 3179 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3180 | } |
3181 | /* | |
3182 | * The provided reservation key much match the existing reservation key | |
3183 | * provided during this initiator's I_T nexus registration. | |
3184 | */ | |
3185 | if (res_key != pr_reg->pr_res_key) { | |
6708bb27 | 3186 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3187 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
3188 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); | |
de103c93 CH |
3189 | ret = TCM_RESERVATION_CONFLICT; |
3190 | goto out_put_pr_reg; | |
c66ac9db NB |
3191 | } |
3192 | /* | |
3193 | * The service active reservation key needs to be non zero | |
3194 | */ | |
6708bb27 AG |
3195 | if (!sa_res_key) { |
3196 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" | |
c66ac9db | 3197 | " sa_res_key\n"); |
de103c93 CH |
3198 | ret = TCM_INVALID_PARAMETER_LIST; |
3199 | goto out_put_pr_reg; | |
c66ac9db | 3200 | } |
05d1c7c0 | 3201 | |
c66ac9db NB |
3202 | /* |
3203 | * Determine the Relative Target Port Identifier where the reservation | |
3204 | * will be moved to for the TransportID containing SCSI initiator WWN | |
3205 | * information. | |
3206 | */ | |
4949314c | 3207 | buf = transport_kmap_data_sg(cmd); |
de103c93 | 3208 | if (!buf) { |
79dd6f2f | 3209 | ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
de103c93 CH |
3210 | goto out_put_pr_reg; |
3211 | } | |
3212 | ||
a85d667e BVA |
3213 | rtpi = get_unaligned_be16(&buf[18]); |
3214 | tid_len = get_unaligned_be32(&buf[20]); | |
4949314c | 3215 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3216 | buf = NULL; |
c66ac9db NB |
3217 | |
3218 | if ((tid_len + 24) != cmd->data_length) { | |
6708bb27 | 3219 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
c66ac9db NB |
3220 | " does not equal CDB data_length: %u\n", tid_len, |
3221 | cmd->data_length); | |
de103c93 CH |
3222 | ret = TCM_INVALID_PARAMETER_LIST; |
3223 | goto out_put_pr_reg; | |
c66ac9db NB |
3224 | } |
3225 | ||
3226 | spin_lock(&dev->se_port_lock); | |
adf653f9 CH |
3227 | list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) { |
3228 | if (tmp_lun->lun_rtpi != rtpi) | |
c66ac9db | 3229 | continue; |
adf653f9 | 3230 | dest_se_tpg = tmp_lun->lun_tpg; |
e3d6f909 | 3231 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
6708bb27 | 3232 | if (!dest_tf_ops) |
c66ac9db NB |
3233 | continue; |
3234 | ||
33940d09 | 3235 | atomic_inc_mb(&dest_se_tpg->tpg_pr_ref_count); |
c66ac9db NB |
3236 | spin_unlock(&dev->se_port_lock); |
3237 | ||
de103c93 | 3238 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
6708bb27 | 3239 | pr_err("core_scsi3_tpg_depend_item() failed" |
c66ac9db | 3240 | " for dest_se_tpg\n"); |
33940d09 | 3241 | atomic_dec_mb(&dest_se_tpg->tpg_pr_ref_count); |
de103c93 CH |
3242 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
3243 | goto out_put_pr_reg; | |
c66ac9db NB |
3244 | } |
3245 | ||
3246 | spin_lock(&dev->se_port_lock); | |
3247 | break; | |
3248 | } | |
3249 | spin_unlock(&dev->se_port_lock); | |
3250 | ||
6708bb27 AG |
3251 | if (!dest_se_tpg || !dest_tf_ops) { |
3252 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db NB |
3253 | " fabric ops from Relative Target Port Identifier:" |
3254 | " %hu\n", rtpi); | |
de103c93 CH |
3255 | ret = TCM_INVALID_PARAMETER_LIST; |
3256 | goto out_put_pr_reg; | |
c66ac9db | 3257 | } |
05d1c7c0 | 3258 | |
4949314c | 3259 | buf = transport_kmap_data_sg(cmd); |
de103c93 | 3260 | if (!buf) { |
79dd6f2f | 3261 | ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
de103c93 CH |
3262 | goto out_put_pr_reg; |
3263 | } | |
c66ac9db | 3264 | proto_ident = (buf[24] & 0x0f); |
8b1e1244 | 3265 | |
6708bb27 | 3266 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
c66ac9db | 3267 | " 0x%02x\n", proto_ident); |
8b1e1244 | 3268 | |
2aeeafae | 3269 | if (proto_ident != dest_se_tpg->proto_id) { |
6708bb27 | 3270 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
c66ac9db NB |
3271 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
3272 | " from fabric: %s\n", proto_ident, | |
2aeeafae | 3273 | dest_se_tpg->proto_id, |
30c7ca93 | 3274 | dest_tf_ops->fabric_name); |
de103c93 | 3275 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3276 | goto out; |
3277 | } | |
2650d71e | 3278 | initiator_str = target_parse_pr_out_transport_id(dest_se_tpg, |
094bb5d7 | 3279 | &buf[24], &tmp_tid_len, &iport_ptr); |
6708bb27 AG |
3280 | if (!initiator_str) { |
3281 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" | |
c66ac9db | 3282 | " initiator_str from Transport ID\n"); |
de103c93 | 3283 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3284 | goto out; |
3285 | } | |
3286 | ||
4949314c | 3287 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3288 | buf = NULL; |
3289 | ||
6708bb27 | 3290 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
30c7ca93 | 3291 | " %s\n", dest_tf_ops->fabric_name, (iport_ptr != NULL) ? |
c66ac9db NB |
3292 | "port" : "device", initiator_str, (iport_ptr != NULL) ? |
3293 | iport_ptr : ""); | |
3294 | /* | |
3295 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3296 | * action specifies a TransportID that is the same as the initiator port | |
3297 | * of the I_T nexus for the command received, then the command shall | |
3298 | * be terminated with CHECK CONDITION status, with the sense key set to | |
3299 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD | |
3300 | * IN PARAMETER LIST. | |
3301 | */ | |
3302 | pr_reg_nacl = pr_reg->pr_reg_nacl; | |
3303 | matching_iname = (!strcmp(initiator_str, | |
3304 | pr_reg_nacl->initiatorname)) ? 1 : 0; | |
6708bb27 | 3305 | if (!matching_iname) |
c66ac9db NB |
3306 | goto after_iport_check; |
3307 | ||
6708bb27 AG |
3308 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
3309 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" | |
c66ac9db NB |
3310 | " matches: %s on received I_T Nexus\n", initiator_str, |
3311 | pr_reg_nacl->initiatorname); | |
de103c93 | 3312 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3313 | goto out; |
3314 | } | |
6708bb27 AG |
3315 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
3316 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" | |
c66ac9db NB |
3317 | " matches: %s %s on received I_T Nexus\n", |
3318 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, | |
3319 | pr_reg->pr_reg_isid); | |
de103c93 | 3320 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3321 | goto out; |
3322 | } | |
3323 | after_iport_check: | |
3324 | /* | |
3325 | * Locate the destination struct se_node_acl from the received Transport ID | |
3326 | */ | |
403edd78 | 3327 | mutex_lock(&dest_se_tpg->acl_node_mutex); |
c66ac9db NB |
3328 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
3329 | initiator_str); | |
33940d09 JE |
3330 | if (dest_node_acl) |
3331 | atomic_inc_mb(&dest_node_acl->acl_pr_ref_count); | |
403edd78 | 3332 | mutex_unlock(&dest_se_tpg->acl_node_mutex); |
c66ac9db | 3333 | |
6708bb27 AG |
3334 | if (!dest_node_acl) { |
3335 | pr_err("Unable to locate %s dest_node_acl for" | |
30c7ca93 | 3336 | " TransportID%s\n", dest_tf_ops->fabric_name, |
c66ac9db | 3337 | initiator_str); |
de103c93 | 3338 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3339 | goto out; |
3340 | } | |
de103c93 CH |
3341 | |
3342 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { | |
6708bb27 | 3343 | pr_err("core_scsi3_nodeacl_depend_item() for" |
c66ac9db | 3344 | " dest_node_acl\n"); |
33940d09 | 3345 | atomic_dec_mb(&dest_node_acl->acl_pr_ref_count); |
c66ac9db | 3346 | dest_node_acl = NULL; |
de103c93 | 3347 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3348 | goto out; |
3349 | } | |
8b1e1244 | 3350 | |
6708bb27 | 3351 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
30c7ca93 | 3352 | " %s from TransportID\n", dest_tf_ops->fabric_name, |
c66ac9db | 3353 | dest_node_acl->initiatorname); |
8b1e1244 | 3354 | |
c66ac9db NB |
3355 | /* |
3356 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET | |
3357 | * PORT IDENTIFIER. | |
3358 | */ | |
3359 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); | |
6708bb27 AG |
3360 | if (!dest_se_deve) { |
3361 | pr_err("Unable to locate %s dest_se_deve from RTPI:" | |
30c7ca93 | 3362 | " %hu\n", dest_tf_ops->fabric_name, rtpi); |
de103c93 | 3363 | ret = TCM_INVALID_PARAMETER_LIST; |
c66ac9db NB |
3364 | goto out; |
3365 | } | |
3366 | ||
de103c93 | 3367 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
6708bb27 | 3368 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
29a05dee | 3369 | kref_put(&dest_se_deve->pr_kref, target_pr_kref_release); |
c66ac9db | 3370 | dest_se_deve = NULL; |
de103c93 | 3371 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3372 | goto out; |
3373 | } | |
8b1e1244 | 3374 | |
6708bb27 | 3375 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
f2d30680 | 3376 | " ACL for dest_se_deve->mapped_lun: %llu\n", |
30c7ca93 | 3377 | dest_tf_ops->fabric_name, dest_node_acl->initiatorname, |
c66ac9db | 3378 | dest_se_deve->mapped_lun); |
8b1e1244 | 3379 | |
c66ac9db NB |
3380 | /* |
3381 | * A persistent reservation needs to already existing in order to | |
3382 | * successfully complete the REGISTER_AND_MOVE service action.. | |
3383 | */ | |
3384 | spin_lock(&dev->dev_reservation_lock); | |
3385 | pr_res_holder = dev->dev_pr_res_holder; | |
6708bb27 AG |
3386 | if (!pr_res_holder) { |
3387 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" | |
c66ac9db NB |
3388 | " currently held\n"); |
3389 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3390 | ret = TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3391 | goto out; |
3392 | } | |
3393 | /* | |
3394 | * The received on I_T Nexus must be the reservation holder. | |
3395 | * | |
3396 | * From spc4r17 section 5.7.8 Table 50 -- | |
3397 | * Register behaviors for a REGISTER AND MOVE service action | |
3398 | */ | |
e673dc92 | 3399 | if (!is_reservation_holder(pr_res_holder, pr_reg)) { |
6708bb27 | 3400 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
c66ac9db NB |
3401 | " Nexus is not reservation holder\n"); |
3402 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3403 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3404 | goto out; |
3405 | } | |
3406 | /* | |
3407 | * From spc4r17 section 5.7.8: registering and moving reservation | |
3408 | * | |
3409 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service | |
3410 | * action is received and the established persistent reservation is a | |
3411 | * Write Exclusive - All Registrants type or Exclusive Access - | |
3412 | * All Registrants type reservation, then the command shall be completed | |
3413 | * with RESERVATION CONFLICT status. | |
3414 | */ | |
3415 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3416 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { | |
6708bb27 | 3417 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
c66ac9db NB |
3418 | " reservation for type: %s\n", |
3419 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); | |
3420 | spin_unlock(&dev->dev_reservation_lock); | |
de103c93 | 3421 | ret = TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
3422 | goto out; |
3423 | } | |
3424 | pr_res_nacl = pr_res_holder->pr_reg_nacl; | |
3425 | /* | |
3426 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; | |
3427 | */ | |
3428 | type = pr_res_holder->pr_res_type; | |
3429 | scope = pr_res_holder->pr_res_type; | |
3430 | /* | |
3431 | * c) Associate the reservation key specified in the SERVICE ACTION | |
3432 | * RESERVATION KEY field with the I_T nexus specified as the | |
3433 | * destination of the register and move, where: | |
3434 | * A) The I_T nexus is specified by the TransportID and the | |
3435 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and | |
3436 | * B) Regardless of the TransportID format used, the association for | |
3437 | * the initiator port is based on either the initiator port name | |
3438 | * (see 3.1.71) on SCSI transport protocols where port names are | |
3439 | * required or the initiator port identifier (see 3.1.70) on SCSI | |
3440 | * transport protocols where port names are not required; | |
3441 | * d) Register the reservation key specified in the SERVICE ACTION | |
3442 | * RESERVATION KEY field; | |
3443 | * e) Retain the reservation key specified in the SERVICE ACTION | |
3444 | * RESERVATION KEY field and associated information; | |
3445 | * | |
3446 | * Also, It is not an error for a REGISTER AND MOVE service action to | |
3447 | * register an I_T nexus that is already registered with the same | |
3448 | * reservation key or a different reservation key. | |
3449 | */ | |
3450 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, | |
3451 | iport_ptr); | |
6708bb27 | 3452 | if (!dest_pr_reg) { |
79dc9c9e | 3453 | struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun, |
2c935bc5 | 3454 | kref_read(&dest_se_deve->pr_kref) != 0); |
79dc9c9e | 3455 | |
80bfdfa9 | 3456 | spin_unlock(&dev->dev_reservation_lock); |
79dc9c9e NB |
3457 | if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl, |
3458 | dest_lun, dest_se_deve, dest_se_deve->mapped_lun, | |
3459 | iport_ptr, sa_res_key, 0, aptpl, 2, 1)) { | |
79dd6f2f | 3460 | ret = TCM_INSUFFICIENT_REGISTRATION_RESOURCES; |
c66ac9db NB |
3461 | goto out; |
3462 | } | |
80bfdfa9 | 3463 | spin_lock(&dev->dev_reservation_lock); |
c66ac9db NB |
3464 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
3465 | iport_ptr); | |
3466 | new_reg = 1; | |
3467 | } | |
3468 | /* | |
3469 | * f) Release the persistent reservation for the persistent reservation | |
3470 | * holder (i.e., the I_T nexus on which the | |
3471 | */ | |
3472 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, | |
6c3c9baa | 3473 | dev->dev_pr_res_holder, 0, 0); |
c66ac9db NB |
3474 | /* |
3475 | * g) Move the persistent reservation to the specified I_T nexus using | |
3476 | * the same scope and type as the persistent reservation released in | |
3477 | * item f); and | |
3478 | */ | |
3479 | dev->dev_pr_res_holder = dest_pr_reg; | |
3480 | dest_pr_reg->pr_res_holder = 1; | |
3481 | dest_pr_reg->pr_res_type = type; | |
3482 | pr_reg->pr_res_scope = scope; | |
d2843c17 | 3483 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
c66ac9db NB |
3484 | /* |
3485 | * Increment PRGeneration for existing registrations.. | |
3486 | */ | |
6708bb27 | 3487 | if (!new_reg) |
c66ac9db NB |
3488 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
3489 | spin_unlock(&dev->dev_reservation_lock); | |
3490 | ||
6708bb27 | 3491 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
c66ac9db | 3492 | " created new reservation holder TYPE: %s on object RTPI:" |
30c7ca93 | 3493 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->fabric_name, |
c66ac9db NB |
3494 | core_scsi3_pr_dump_type(type), rtpi, |
3495 | dest_pr_reg->pr_res_generation); | |
6708bb27 | 3496 | pr_debug("SPC-3 PR Successfully moved reservation from" |
c66ac9db | 3497 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
30c7ca93 DD |
3498 | tf_ops->fabric_name, pr_reg_nacl->initiatorname, |
3499 | i_buf, dest_tf_ops->fabric_name, | |
c66ac9db NB |
3500 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? |
3501 | iport_ptr : ""); | |
3502 | /* | |
3503 | * It is now safe to release configfs group dependencies for destination | |
3504 | * of Transport ID Initiator Device/Port Identifier | |
3505 | */ | |
3506 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3507 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3508 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
3509 | /* | |
3510 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T | |
3511 | * nexus on which PERSISTENT RESERVE OUT command was received. | |
3512 | */ | |
3513 | if (unreg) { | |
3514 | spin_lock(&pr_tmpl->registration_lock); | |
3515 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); | |
3516 | spin_unlock(&pr_tmpl->registration_lock); | |
3517 | } else | |
3518 | core_scsi3_put_pr_reg(pr_reg); | |
3519 | ||
459f213b | 3520 | core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); |
c66ac9db NB |
3521 | |
3522 | core_scsi3_put_pr_reg(dest_pr_reg); | |
3523 | return 0; | |
3524 | out: | |
05d1c7c0 | 3525 | if (buf) |
4949314c | 3526 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3527 | if (dest_se_deve) |
3528 | core_scsi3_lunacl_undepend_item(dest_se_deve); | |
3529 | if (dest_node_acl) | |
3530 | core_scsi3_nodeacl_undepend_item(dest_node_acl); | |
3531 | core_scsi3_tpg_undepend_item(dest_se_tpg); | |
de103c93 CH |
3532 | |
3533 | out_put_pr_reg: | |
c66ac9db NB |
3534 | core_scsi3_put_pr_reg(pr_reg); |
3535 | return ret; | |
3536 | } | |
3537 | ||
c66ac9db NB |
3538 | /* |
3539 | * See spc4r17 section 6.14 Table 170 | |
3540 | */ | |
de103c93 CH |
3541 | sense_reason_t |
3542 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) | |
c66ac9db | 3543 | { |
92404e60 | 3544 | struct se_device *dev = cmd->se_dev; |
617c0e06 | 3545 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
05d1c7c0 | 3546 | unsigned char *buf; |
c66ac9db NB |
3547 | u64 res_key, sa_res_key; |
3548 | int sa, scope, type, aptpl; | |
3549 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; | |
de103c93 | 3550 | sense_reason_t ret; |
617c0e06 CH |
3551 | |
3552 | /* | |
3553 | * Following spc2r20 5.5.1 Reservations overview: | |
3554 | * | |
3555 | * If a logical unit has been reserved by any RESERVE command and is | |
3556 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
3557 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
3558 | * initiator or service action and shall terminate with a RESERVATION | |
3559 | * CONFLICT status. | |
3560 | */ | |
0fd97ccf | 3561 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
617c0e06 CH |
3562 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
3563 | " SPC-2 reservation is held, returning" | |
3564 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 3565 | return TCM_RESERVATION_CONFLICT; |
617c0e06 CH |
3566 | } |
3567 | ||
c66ac9db NB |
3568 | /* |
3569 | * FIXME: A NULL struct se_session pointer means an this is not coming from | |
3570 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. | |
3571 | */ | |
de103c93 CH |
3572 | if (!cmd->se_sess) |
3573 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db NB |
3574 | |
3575 | if (cmd->data_length < 24) { | |
6708bb27 | 3576 | pr_warn("SPC-PR: Received PR OUT parameter list" |
c66ac9db | 3577 | " length too small: %u\n", cmd->data_length); |
7ee00317 | 3578 | return TCM_PARAMETER_LIST_LENGTH_ERROR; |
c66ac9db | 3579 | } |
de103c93 | 3580 | |
c66ac9db NB |
3581 | /* |
3582 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) | |
3583 | */ | |
3584 | sa = (cdb[1] & 0x1f); | |
3585 | scope = (cdb[2] & 0xf0); | |
3586 | type = (cdb[2] & 0x0f); | |
05d1c7c0 | 3587 | |
4949314c | 3588 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3589 | if (!buf) |
3590 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3591 | ||
c66ac9db NB |
3592 | /* |
3593 | * From PERSISTENT_RESERVE_OUT parameter list (payload) | |
3594 | */ | |
a85d667e BVA |
3595 | res_key = get_unaligned_be64(&buf[0]); |
3596 | sa_res_key = get_unaligned_be64(&buf[8]); | |
c66ac9db NB |
3597 | /* |
3598 | * REGISTER_AND_MOVE uses a different SA parameter list containing | |
3599 | * SCSI TransportIDs. | |
3600 | */ | |
3601 | if (sa != PRO_REGISTER_AND_MOVE) { | |
3602 | spec_i_pt = (buf[20] & 0x08); | |
3603 | all_tg_pt = (buf[20] & 0x04); | |
3604 | aptpl = (buf[20] & 0x01); | |
3605 | } else { | |
3606 | aptpl = (buf[17] & 0x01); | |
3607 | unreg = (buf[17] & 0x02); | |
3608 | } | |
92404e60 NB |
3609 | /* |
3610 | * If the backend device has been configured to force APTPL metadata | |
3611 | * write-out, go ahead and propigate aptpl=1 down now. | |
3612 | */ | |
3613 | if (dev->dev_attrib.force_pr_aptpl) | |
3614 | aptpl = 1; | |
3615 | ||
4949314c | 3616 | transport_kunmap_data_sg(cmd); |
05d1c7c0 AG |
3617 | buf = NULL; |
3618 | ||
c66ac9db NB |
3619 | /* |
3620 | * SPEC_I_PT=1 is only valid for Service action: REGISTER | |
3621 | */ | |
7ee00317 | 3622 | if (spec_i_pt && (sa != PRO_REGISTER)) |
de103c93 | 3623 | return TCM_INVALID_PARAMETER_LIST; |
d29a5b6a | 3624 | |
c66ac9db NB |
3625 | /* |
3626 | * From spc4r17 section 6.14: | |
3627 | * | |
3628 | * If the SPEC_I_PT bit is set to zero, the service action is not | |
3629 | * REGISTER AND MOVE, and the parameter list length is not 24, then | |
3630 | * the command shall be terminated with CHECK CONDITION status, with | |
3631 | * the sense key set to ILLEGAL REQUEST, and the additional sense | |
3632 | * code set to PARAMETER LIST LENGTH ERROR. | |
3633 | */ | |
7ee00317 | 3634 | if (!spec_i_pt && (sa != PRO_REGISTER_AND_MOVE) && |
c66ac9db | 3635 | (cmd->data_length != 24)) { |
6708bb27 | 3636 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
c66ac9db | 3637 | " list length: %u\n", cmd->data_length); |
7ee00317 | 3638 | return TCM_PARAMETER_LIST_LENGTH_ERROR; |
c66ac9db | 3639 | } |
de103c93 | 3640 | |
c66ac9db NB |
3641 | /* |
3642 | * (core_scsi3_emulate_pro_* function parameters | |
3643 | * are defined by spc4r17 Table 174: | |
3644 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. | |
3645 | */ | |
3646 | switch (sa) { | |
3647 | case PRO_REGISTER: | |
d29a5b6a | 3648 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3649 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); |
d29a5b6a | 3650 | break; |
c66ac9db | 3651 | case PRO_RESERVE: |
d29a5b6a CH |
3652 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
3653 | break; | |
c66ac9db | 3654 | case PRO_RELEASE: |
d29a5b6a CH |
3655 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
3656 | break; | |
c66ac9db | 3657 | case PRO_CLEAR: |
d29a5b6a CH |
3658 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
3659 | break; | |
c66ac9db | 3660 | case PRO_PREEMPT: |
d29a5b6a | 3661 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3662 | res_key, sa_res_key, PREEMPT); |
d29a5b6a | 3663 | break; |
c66ac9db | 3664 | case PRO_PREEMPT_AND_ABORT: |
d29a5b6a | 3665 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
33ce6a87 | 3666 | res_key, sa_res_key, PREEMPT_AND_ABORT); |
d29a5b6a | 3667 | break; |
c66ac9db | 3668 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
d29a5b6a | 3669 | ret = core_scsi3_emulate_pro_register(cmd, |
33ce6a87 | 3670 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); |
d29a5b6a | 3671 | break; |
c66ac9db | 3672 | case PRO_REGISTER_AND_MOVE: |
d29a5b6a | 3673 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
c66ac9db | 3674 | sa_res_key, aptpl, unreg); |
d29a5b6a | 3675 | break; |
c66ac9db | 3676 | default: |
6708bb27 | 3677 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
7ee00317 | 3678 | " action: 0x%02x\n", sa); |
de103c93 | 3679 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3680 | } |
3681 | ||
6bb35e00 CH |
3682 | if (!ret) |
3683 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 3684 | return ret; |
c66ac9db NB |
3685 | } |
3686 | ||
3687 | /* | |
3688 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS | |
3689 | * | |
3690 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 | |
3691 | */ | |
de103c93 CH |
3692 | static sense_reason_t |
3693 | core_scsi3_pri_read_keys(struct se_cmd *cmd) | |
c66ac9db | 3694 | { |
0fd97ccf | 3695 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3696 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3697 | unsigned char *buf; |
c66ac9db NB |
3698 | u32 add_len = 0, off = 8; |
3699 | ||
3700 | if (cmd->data_length < 8) { | |
6708bb27 | 3701 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
c66ac9db | 3702 | " too small\n", cmd->data_length); |
de103c93 | 3703 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3704 | } |
3705 | ||
4949314c | 3706 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3707 | if (!buf) |
3708 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3709 | ||
a85d667e | 3710 | put_unaligned_be32(dev->t10_pr.pr_generation, buf); |
c66ac9db | 3711 | |
0fd97ccf CH |
3712 | spin_lock(&dev->t10_pr.registration_lock); |
3713 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, | |
c66ac9db NB |
3714 | pr_reg_list) { |
3715 | /* | |
3716 | * Check for overflow of 8byte PRI READ_KEYS payload and | |
3717 | * next reservation key list descriptor. | |
3718 | */ | |
63ce3c38 DD |
3719 | if (off + 8 <= cmd->data_length) { |
3720 | put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); | |
3721 | off += 8; | |
3722 | } | |
3723 | /* | |
3724 | * SPC5r17: 6.16.2 READ KEYS service action | |
3725 | * The ADDITIONAL LENGTH field indicates the number of bytes in | |
3726 | * the Reservation key list. The contents of the ADDITIONAL | |
3727 | * LENGTH field are not altered based on the allocation length | |
3728 | */ | |
c66ac9db NB |
3729 | add_len += 8; |
3730 | } | |
0fd97ccf | 3731 | spin_unlock(&dev->t10_pr.registration_lock); |
c66ac9db | 3732 | |
a85d667e | 3733 | put_unaligned_be32(add_len, &buf[4]); |
a8b41d2e | 3734 | target_set_cmd_data_length(cmd, 8 + add_len); |
c66ac9db | 3735 | |
4949314c | 3736 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3737 | |
c66ac9db NB |
3738 | return 0; |
3739 | } | |
3740 | ||
3741 | /* | |
3742 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION | |
3743 | * | |
3744 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 | |
3745 | */ | |
de103c93 CH |
3746 | static sense_reason_t |
3747 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) | |
c66ac9db | 3748 | { |
0fd97ccf | 3749 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3750 | struct t10_pr_registration *pr_reg; |
05d1c7c0 | 3751 | unsigned char *buf; |
c66ac9db | 3752 | u64 pr_res_key; |
a8b41d2e | 3753 | u32 add_len = 0; |
c66ac9db NB |
3754 | |
3755 | if (cmd->data_length < 8) { | |
6708bb27 | 3756 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
c66ac9db | 3757 | " too small\n", cmd->data_length); |
de103c93 | 3758 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3759 | } |
3760 | ||
4949314c | 3761 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3762 | if (!buf) |
3763 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3764 | ||
a85d667e | 3765 | put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); |
c66ac9db | 3766 | |
0fd97ccf CH |
3767 | spin_lock(&dev->dev_reservation_lock); |
3768 | pr_reg = dev->dev_pr_res_holder; | |
ee1b1b9c | 3769 | if (pr_reg) { |
c66ac9db | 3770 | /* |
a8b41d2e | 3771 | * Set the Additional Length to 16 when a reservation is held |
c66ac9db | 3772 | */ |
a8b41d2e | 3773 | add_len = 16; |
a85d667e | 3774 | put_unaligned_be32(add_len, &buf[4]); |
c66ac9db | 3775 | |
05d1c7c0 AG |
3776 | if (cmd->data_length < 22) |
3777 | goto err; | |
3778 | ||
c66ac9db NB |
3779 | /* |
3780 | * Set the Reservation key. | |
3781 | * | |
3782 | * From spc4r17, section 5.7.10: | |
3783 | * A persistent reservation holder has its reservation key | |
3784 | * returned in the parameter data from a PERSISTENT | |
3785 | * RESERVE IN command with READ RESERVATION service action as | |
3786 | * follows: | |
3787 | * a) For a persistent reservation of the type Write Exclusive | |
3788 | * - All Registrants or Exclusive Access  All Regitrants, | |
3789 | * the reservation key shall be set to zero; or | |
3790 | * b) For all other persistent reservation types, the | |
3791 | * reservation key shall be set to the registered | |
3792 | * reservation key for the I_T nexus that holds the | |
3793 | * persistent reservation. | |
3794 | */ | |
3795 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || | |
3796 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) | |
3797 | pr_res_key = 0; | |
3798 | else | |
3799 | pr_res_key = pr_reg->pr_res_key; | |
3800 | ||
a85d667e | 3801 | put_unaligned_be64(pr_res_key, &buf[8]); |
c66ac9db NB |
3802 | /* |
3803 | * Set the SCOPE and TYPE | |
3804 | */ | |
3805 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | | |
3806 | (pr_reg->pr_res_type & 0x0f); | |
3807 | } | |
05d1c7c0 | 3808 | |
a8b41d2e AM |
3809 | target_set_cmd_data_length(cmd, 8 + add_len); |
3810 | ||
05d1c7c0 | 3811 | err: |
0fd97ccf | 3812 | spin_unlock(&dev->dev_reservation_lock); |
4949314c | 3813 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
3814 | |
3815 | return 0; | |
3816 | } | |
3817 | ||
3818 | /* | |
3819 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES | |
3820 | * | |
3821 | * See spc4r17 section 6.13.4 Table 165 | |
3822 | */ | |
de103c93 CH |
3823 | static sense_reason_t |
3824 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) | |
c66ac9db | 3825 | { |
5951146d | 3826 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 3827 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3828 | unsigned char *buf; |
a8b41d2e | 3829 | u16 len = 8; /* Hardcoded to 8. */ |
c66ac9db NB |
3830 | |
3831 | if (cmd->data_length < 6) { | |
6708bb27 | 3832 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
c66ac9db | 3833 | " %u too small\n", cmd->data_length); |
de103c93 | 3834 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3835 | } |
3836 | ||
4949314c | 3837 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3838 | if (!buf) |
3839 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3840 | |
a8b41d2e | 3841 | put_unaligned_be16(len, &buf[0]); |
c66ac9db NB |
3842 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ |
3843 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ | |
3844 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ | |
3845 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ | |
3846 | /* | |
3847 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so | |
3848 | * set the TMV: Task Mask Valid bit. | |
3849 | */ | |
3850 | buf[3] |= 0x80; | |
3851 | /* | |
3852 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 | |
3853 | */ | |
3854 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ | |
3855 | /* | |
3856 | * PTPL_A: Persistence across Target Power Loss Active bit | |
3857 | */ | |
3858 | if (pr_tmpl->pr_aptpl_active) | |
3859 | buf[3] |= 0x01; | |
3860 | /* | |
3861 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 | |
3862 | */ | |
3863 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3864 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ | |
3865 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ | |
3866 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ | |
3867 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ | |
3868 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ | |
3869 | ||
a8b41d2e AM |
3870 | target_set_cmd_data_length(cmd, len); |
3871 | ||
4949314c | 3872 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 3873 | |
c66ac9db NB |
3874 | return 0; |
3875 | } | |
3876 | ||
3877 | /* | |
3878 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS | |
3879 | * | |
3880 | * See spc4r17 section 6.13.5 Table 168 and 169 | |
3881 | */ | |
de103c93 CH |
3882 | static sense_reason_t |
3883 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) | |
c66ac9db | 3884 | { |
0fd97ccf | 3885 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 3886 | struct se_node_acl *se_nacl; |
c66ac9db NB |
3887 | struct se_portal_group *se_tpg; |
3888 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; | |
0fd97ccf | 3889 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
05d1c7c0 | 3890 | unsigned char *buf; |
2650d71e | 3891 | u32 add_desc_len = 0, add_len = 0; |
c66ac9db | 3892 | u32 off = 8; /* off into first Full Status descriptor */ |
d16ca7c5 | 3893 | int format_code = 0, pr_res_type = 0, pr_res_scope = 0; |
2650d71e | 3894 | int exp_desc_len, desc_len; |
d16ca7c5 | 3895 | bool all_reg = false; |
c66ac9db NB |
3896 | |
3897 | if (cmd->data_length < 8) { | |
6708bb27 | 3898 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
c66ac9db | 3899 | " too small\n", cmd->data_length); |
de103c93 | 3900 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
3901 | } |
3902 | ||
4949314c | 3903 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
3904 | if (!buf) |
3905 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
05d1c7c0 | 3906 | |
a85d667e | 3907 | put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); |
c66ac9db | 3908 | |
d16ca7c5 NB |
3909 | spin_lock(&dev->dev_reservation_lock); |
3910 | if (dev->dev_pr_res_holder) { | |
3911 | struct t10_pr_registration *pr_holder = dev->dev_pr_res_holder; | |
3912 | ||
3913 | if (pr_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG || | |
3914 | pr_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG) { | |
3915 | all_reg = true; | |
3916 | pr_res_type = pr_holder->pr_res_type; | |
3917 | pr_res_scope = pr_holder->pr_res_scope; | |
3918 | } | |
3919 | } | |
3920 | spin_unlock(&dev->dev_reservation_lock); | |
3921 | ||
c66ac9db NB |
3922 | spin_lock(&pr_tmpl->registration_lock); |
3923 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, | |
3924 | &pr_tmpl->registration_list, pr_reg_list) { | |
3925 | ||
3926 | se_nacl = pr_reg->pr_reg_nacl; | |
3927 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; | |
3928 | add_desc_len = 0; | |
3929 | ||
33940d09 | 3930 | atomic_inc_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3931 | spin_unlock(&pr_tmpl->registration_lock); |
3932 | /* | |
3933 | * Determine expected length of $FABRIC_MOD specific | |
3934 | * TransportID full status descriptor.. | |
3935 | */ | |
2650d71e CH |
3936 | exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg, |
3937 | &format_code); | |
3938 | if (exp_desc_len < 0 || | |
3939 | exp_desc_len + add_len > cmd->data_length) { | |
6708bb27 | 3940 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
c66ac9db NB |
3941 | " out of buffer: %d\n", cmd->data_length); |
3942 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 3943 | atomic_dec_mb(&pr_reg->pr_res_holders); |
c66ac9db NB |
3944 | break; |
3945 | } | |
3946 | /* | |
3947 | * Set RESERVATION KEY | |
3948 | */ | |
a85d667e BVA |
3949 | put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); |
3950 | off += 8; | |
c66ac9db NB |
3951 | off += 4; /* Skip Over Reserved area */ |
3952 | ||
3953 | /* | |
3954 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. | |
3955 | */ | |
3956 | if (pr_reg->pr_reg_all_tg_pt) | |
3957 | buf[off] = 0x02; | |
3958 | /* | |
3959 | * The struct se_lun pointer will be present for the | |
3960 | * reservation holder for PR_HOLDER bit. | |
3961 | * | |
3962 | * Also, if this registration is the reservation | |
d16ca7c5 NB |
3963 | * holder or there is an All Registrants reservation |
3964 | * active, fill in SCOPE and TYPE in the next byte. | |
c66ac9db NB |
3965 | */ |
3966 | if (pr_reg->pr_res_holder) { | |
3967 | buf[off++] |= 0x01; | |
3968 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | | |
3969 | (pr_reg->pr_res_type & 0x0f); | |
d16ca7c5 NB |
3970 | } else if (all_reg) { |
3971 | buf[off++] |= 0x01; | |
3972 | buf[off++] = (pr_res_scope & 0xf0) | | |
3973 | (pr_res_type & 0x0f); | |
3974 | } else { | |
c66ac9db | 3975 | off += 2; |
d16ca7c5 | 3976 | } |
c66ac9db NB |
3977 | |
3978 | off += 4; /* Skip over reserved area */ | |
3979 | /* | |
3980 | * From spc4r17 6.3.15: | |
3981 | * | |
3982 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT | |
3983 | * IDENTIFIER field contains the relative port identifier (see | |
3984 | * 3.1.120) of the target port that is part of the I_T nexus | |
3985 | * described by this full status descriptor. If the ALL_TG_PT | |
3986 | * bit is set to one, the contents of the RELATIVE TARGET PORT | |
3987 | * IDENTIFIER field are not defined by this standard. | |
3988 | */ | |
6708bb27 | 3989 | if (!pr_reg->pr_reg_all_tg_pt) { |
79dc9c9e | 3990 | u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; |
c66ac9db | 3991 | |
a85d667e BVA |
3992 | put_unaligned_be16(sep_rtpi, &buf[off]); |
3993 | off += 2; | |
c66ac9db | 3994 | } else |
35d1efe8 | 3995 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
c66ac9db | 3996 | |
2650d71e CH |
3997 | buf[off+4] = se_tpg->proto_id; |
3998 | ||
c66ac9db | 3999 | /* |
2650d71e | 4000 | * Now, have the $FABRIC_MOD fill in the transport ID. |
c66ac9db | 4001 | */ |
2650d71e CH |
4002 | desc_len = target_get_pr_transport_id(se_nacl, pr_reg, |
4003 | &format_code, &buf[off+4]); | |
c66ac9db NB |
4004 | |
4005 | spin_lock(&pr_tmpl->registration_lock); | |
33940d09 | 4006 | atomic_dec_mb(&pr_reg->pr_res_holders); |
2650d71e CH |
4007 | |
4008 | if (desc_len < 0) | |
4009 | break; | |
c66ac9db NB |
4010 | /* |
4011 | * Set the ADDITIONAL DESCRIPTOR LENGTH | |
4012 | */ | |
a85d667e | 4013 | put_unaligned_be32(desc_len, &buf[off]); |
c58a252b | 4014 | off += 4; |
c66ac9db NB |
4015 | /* |
4016 | * Size of full desctipor header minus TransportID | |
4017 | * containing $FABRIC_MOD specific) initiator device/port | |
4018 | * WWN information. | |
4019 | * | |
4020 | * See spc4r17 Section 6.13.5 Table 169 | |
4021 | */ | |
4022 | add_desc_len = (24 + desc_len); | |
4023 | ||
4024 | off += desc_len; | |
4025 | add_len += add_desc_len; | |
4026 | } | |
4027 | spin_unlock(&pr_tmpl->registration_lock); | |
4028 | /* | |
4029 | * Set ADDITIONAL_LENGTH | |
4030 | */ | |
a85d667e | 4031 | put_unaligned_be32(add_len, &buf[4]); |
a8b41d2e | 4032 | target_set_cmd_data_length(cmd, 8 + add_len); |
c66ac9db | 4033 | |
4949314c | 4034 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 4035 | |
c66ac9db NB |
4036 | return 0; |
4037 | } | |
4038 | ||
de103c93 CH |
4039 | sense_reason_t |
4040 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) | |
c66ac9db | 4041 | { |
de103c93 | 4042 | sense_reason_t ret; |
e76a35d6 | 4043 | |
c66ac9db NB |
4044 | /* |
4045 | * Following spc2r20 5.5.1 Reservations overview: | |
4046 | * | |
4047 | * If a logical unit has been reserved by any RESERVE command and is | |
4048 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all | |
4049 | * PERSISTENT RESERVE OUT commands shall conflict regardless of | |
4050 | * initiator or service action and shall terminate with a RESERVATION | |
4051 | * CONFLICT status. | |
4052 | */ | |
0fd97ccf | 4053 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
6708bb27 | 4054 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
c66ac9db NB |
4055 | " SPC-2 reservation is held, returning" |
4056 | " RESERVATION_CONFLICT\n"); | |
de103c93 | 4057 | return TCM_RESERVATION_CONFLICT; |
c66ac9db NB |
4058 | } |
4059 | ||
617c0e06 CH |
4060 | switch (cmd->t_task_cdb[1] & 0x1f) { |
4061 | case PRI_READ_KEYS: | |
d29a5b6a CH |
4062 | ret = core_scsi3_pri_read_keys(cmd); |
4063 | break; | |
617c0e06 | 4064 | case PRI_READ_RESERVATION: |
d29a5b6a CH |
4065 | ret = core_scsi3_pri_read_reservation(cmd); |
4066 | break; | |
617c0e06 | 4067 | case PRI_REPORT_CAPABILITIES: |
d29a5b6a CH |
4068 | ret = core_scsi3_pri_report_capabilities(cmd); |
4069 | break; | |
617c0e06 | 4070 | case PRI_READ_FULL_STATUS: |
d29a5b6a CH |
4071 | ret = core_scsi3_pri_read_full_status(cmd); |
4072 | break; | |
617c0e06 CH |
4073 | default: |
4074 | pr_err("Unknown PERSISTENT_RESERVE_IN service" | |
4075 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); | |
de103c93 | 4076 | return TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
4077 | } |
4078 | ||
6bb35e00 CH |
4079 | if (!ret) |
4080 | target_complete_cmd(cmd, GOOD); | |
d29a5b6a | 4081 | return ret; |
c66ac9db NB |
4082 | } |
4083 | ||
de103c93 CH |
4084 | sense_reason_t |
4085 | target_check_reservation(struct se_cmd *cmd) | |
c66ac9db | 4086 | { |
d977f437 | 4087 | struct se_device *dev = cmd->se_dev; |
de103c93 | 4088 | sense_reason_t ret; |
c66ac9db | 4089 | |
d977f437 CH |
4090 | if (!cmd->se_sess) |
4091 | return 0; | |
4092 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) | |
4093 | return 0; | |
b49d6f78 DD |
4094 | if (!dev->dev_attrib.emulate_pr) |
4095 | return 0; | |
4ec5bf0e | 4096 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) |
d977f437 | 4097 | return 0; |
c66ac9db | 4098 | |
d977f437 CH |
4099 | spin_lock(&dev->dev_reservation_lock); |
4100 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) | |
4101 | ret = target_scsi2_reservation_check(cmd); | |
4102 | else | |
4103 | ret = target_scsi3_pr_reservation_check(cmd); | |
4104 | spin_unlock(&dev->dev_reservation_lock); | |
0fd97ccf | 4105 | |
d977f437 | 4106 | return ret; |
c66ac9db | 4107 | } |