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cbf031f4 NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_xcopy.c | |
3 | * | |
4 | * This file contains support for SPC-4 Extended-Copy offload with generic | |
5 | * TCM backends. | |
6 | * | |
7 | * Copyright (c) 2011-2013 Datera, Inc. All rights reserved. | |
8 | * | |
9 | * Author: | |
10 | * Nicholas A. Bellinger <nab@daterainc.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | ******************************************************************************/ | |
23 | ||
cbf031f4 NB |
24 | #include <linux/slab.h> |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/configfs.h> | |
ba929992 | 28 | #include <scsi/scsi_proto.h> |
cbf031f4 NB |
29 | #include <asm/unaligned.h> |
30 | ||
31 | #include <target/target_core_base.h> | |
32 | #include <target/target_core_backend.h> | |
33 | #include <target/target_core_fabric.h> | |
34 | #include <target/target_core_configfs.h> | |
35 | ||
b13876d2 | 36 | #include "target_core_internal.h" |
cbf031f4 NB |
37 | #include "target_core_pr.h" |
38 | #include "target_core_ua.h" | |
39 | #include "target_core_xcopy.h" | |
40 | ||
41 | static struct workqueue_struct *xcopy_wq = NULL; | |
cbf031f4 NB |
42 | |
43 | static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) | |
44 | { | |
45 | int off = 0; | |
46 | ||
47 | buf[off++] = (0x6 << 4); | |
48 | buf[off++] = 0x01; | |
49 | buf[off++] = 0x40; | |
50 | buf[off] = (0x5 << 4); | |
51 | ||
52 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
57 | bool src) | |
58 | { | |
59 | struct se_device *se_dev; | |
cbf031f4 NB |
60 | unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; |
61 | int rc; | |
62 | ||
0bcc297e | 63 | if (src) |
cbf031f4 NB |
64 | dev_wwn = &xop->dst_tid_wwn[0]; |
65 | else | |
66 | dev_wwn = &xop->src_tid_wwn[0]; | |
67 | ||
68 | mutex_lock(&g_device_mutex); | |
69 | list_for_each_entry(se_dev, &g_device_list, g_dev_node) { | |
70 | ||
acb3f260 NB |
71 | if (!se_dev->dev_attrib.emulate_3pc) |
72 | continue; | |
73 | ||
cbf031f4 NB |
74 | memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); |
75 | target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); | |
76 | ||
77 | rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); | |
78 | if (rc != 0) | |
79 | continue; | |
80 | ||
0bcc297e | 81 | if (src) { |
cbf031f4 NB |
82 | xop->dst_dev = se_dev; |
83 | pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" | |
84 | " se_dev\n", xop->dst_dev); | |
85 | } else { | |
86 | xop->src_dev = se_dev; | |
87 | pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" | |
88 | " se_dev\n", xop->src_dev); | |
89 | } | |
90 | ||
d588cf8f | 91 | rc = target_depend_item(&se_dev->dev_group.cg_item); |
cbf031f4 NB |
92 | if (rc != 0) { |
93 | pr_err("configfs_depend_item attempt failed:" | |
94 | " %d for se_dev: %p\n", rc, se_dev); | |
95 | mutex_unlock(&g_device_mutex); | |
96 | return rc; | |
97 | } | |
98 | ||
d588cf8f CH |
99 | pr_debug("Called configfs_depend_item for se_dev: %p" |
100 | " se_dev->se_dev_group: %p\n", se_dev, | |
cbf031f4 NB |
101 | &se_dev->dev_group); |
102 | ||
103 | mutex_unlock(&g_device_mutex); | |
104 | return 0; | |
105 | } | |
106 | mutex_unlock(&g_device_mutex); | |
107 | ||
108 | pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); | |
109 | return -EINVAL; | |
110 | } | |
111 | ||
112 | static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
113 | unsigned char *p, bool src) | |
114 | { | |
115 | unsigned char *desc = p; | |
116 | unsigned short ript; | |
117 | u8 desig_len; | |
118 | /* | |
119 | * Extract RELATIVE INITIATOR PORT IDENTIFIER | |
120 | */ | |
121 | ript = get_unaligned_be16(&desc[2]); | |
122 | pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); | |
123 | /* | |
124 | * Check for supported code set, association, and designator type | |
125 | */ | |
126 | if ((desc[4] & 0x0f) != 0x1) { | |
127 | pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); | |
128 | return -EINVAL; | |
129 | } | |
130 | if ((desc[5] & 0x30) != 0x00) { | |
131 | pr_err("XCOPY 0xe4: association other than LUN not supported\n"); | |
132 | return -EINVAL; | |
133 | } | |
134 | if ((desc[5] & 0x0f) != 0x3) { | |
135 | pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", | |
136 | (desc[5] & 0x0f)); | |
137 | return -EINVAL; | |
138 | } | |
139 | /* | |
140 | * Check for matching 16 byte length for NAA IEEE Registered Extended | |
141 | * Assigned designator | |
142 | */ | |
143 | desig_len = desc[7]; | |
144 | if (desig_len != 16) { | |
145 | pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); | |
146 | return -EINVAL; | |
147 | } | |
148 | pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); | |
149 | /* | |
150 | * Check for NAA IEEE Registered Extended Assigned header.. | |
151 | */ | |
152 | if ((desc[8] & 0xf0) != 0x60) { | |
153 | pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", | |
154 | (desc[8] & 0xf0)); | |
155 | return -EINVAL; | |
156 | } | |
157 | ||
0bcc297e | 158 | if (src) { |
cbf031f4 NB |
159 | memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
160 | /* | |
161 | * Determine if the source designator matches the local device | |
162 | */ | |
163 | if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], | |
164 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
165 | xop->op_origin = XCOL_SOURCE_RECV_OP; | |
166 | xop->src_dev = se_cmd->se_dev; | |
167 | pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" | |
168 | " received xop\n", xop->src_dev); | |
169 | } | |
170 | } else { | |
171 | memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); | |
172 | /* | |
173 | * Determine if the destination designator matches the local device | |
174 | */ | |
175 | if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], | |
176 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
177 | xop->op_origin = XCOL_DEST_RECV_OP; | |
178 | xop->dst_dev = se_cmd->se_dev; | |
179 | pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" | |
180 | " received xop\n", xop->dst_dev); | |
181 | } | |
182 | } | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, | |
188 | struct xcopy_op *xop, unsigned char *p, | |
189 | unsigned short tdll) | |
190 | { | |
191 | struct se_device *local_dev = se_cmd->se_dev; | |
192 | unsigned char *desc = p; | |
193 | int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; | |
194 | unsigned short start = 0; | |
195 | bool src = true; | |
196 | ||
197 | if (offset != 0) { | |
198 | pr_err("XCOPY target descriptor list length is not" | |
199 | " multiple of %d\n", XCOPY_TARGET_DESC_LEN); | |
200 | return -EINVAL; | |
201 | } | |
202 | if (tdll > 64) { | |
203 | pr_err("XCOPY target descriptor supports a maximum" | |
204 | " two src/dest descriptors, tdll: %hu too large..\n", tdll); | |
205 | return -EINVAL; | |
206 | } | |
207 | /* | |
208 | * Generate an IEEE Registered Extended designator based upon the | |
209 | * se_device the XCOPY was received upon.. | |
210 | */ | |
211 | memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); | |
212 | target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); | |
213 | ||
214 | while (start < tdll) { | |
215 | /* | |
216 | * Check target descriptor identification with 0xE4 type with | |
217 | * use VPD 0x83 WWPN matching .. | |
218 | */ | |
219 | switch (desc[0]) { | |
220 | case 0xe4: | |
221 | rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, | |
222 | &desc[0], src); | |
223 | if (rc != 0) | |
224 | goto out; | |
225 | /* | |
226 | * Assume target descriptors are in source -> destination order.. | |
227 | */ | |
0bcc297e | 228 | if (src) |
cbf031f4 NB |
229 | src = false; |
230 | else | |
231 | src = true; | |
232 | start += XCOPY_TARGET_DESC_LEN; | |
233 | desc += XCOPY_TARGET_DESC_LEN; | |
234 | ret++; | |
235 | break; | |
236 | default: | |
237 | pr_err("XCOPY unsupported descriptor type code:" | |
238 | " 0x%02x\n", desc[0]); | |
239 | goto out; | |
240 | } | |
241 | } | |
242 | ||
243 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
244 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); | |
245 | else | |
246 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); | |
247 | ||
248 | if (rc < 0) | |
249 | goto out; | |
250 | ||
251 | pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", | |
252 | xop->src_dev, &xop->src_tid_wwn[0]); | |
253 | pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", | |
254 | xop->dst_dev, &xop->dst_tid_wwn[0]); | |
255 | ||
256 | return ret; | |
257 | ||
258 | out: | |
259 | return -EINVAL; | |
260 | } | |
261 | ||
262 | static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
263 | unsigned char *p) | |
264 | { | |
265 | unsigned char *desc = p; | |
266 | int dc = (desc[1] & 0x02); | |
267 | unsigned short desc_len; | |
268 | ||
269 | desc_len = get_unaligned_be16(&desc[2]); | |
270 | if (desc_len != 0x18) { | |
271 | pr_err("XCOPY segment desc 0x02: Illegal desc_len:" | |
272 | " %hu\n", desc_len); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | xop->stdi = get_unaligned_be16(&desc[4]); | |
277 | xop->dtdi = get_unaligned_be16(&desc[6]); | |
278 | pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", | |
279 | desc_len, xop->stdi, xop->dtdi, dc); | |
280 | ||
281 | xop->nolb = get_unaligned_be16(&desc[10]); | |
282 | xop->src_lba = get_unaligned_be64(&desc[12]); | |
283 | xop->dst_lba = get_unaligned_be64(&desc[20]); | |
284 | pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", | |
285 | xop->nolb, (unsigned long long)xop->src_lba, | |
286 | (unsigned long long)xop->dst_lba); | |
287 | ||
288 | if (dc != 0) { | |
3e9e01de NB |
289 | xop->dbl = (desc[29] & 0xff) << 16; |
290 | xop->dbl |= (desc[30] & 0xff) << 8; | |
cbf031f4 NB |
291 | xop->dbl |= desc[31] & 0xff; |
292 | ||
293 | pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); | |
294 | } | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, | |
299 | struct xcopy_op *xop, unsigned char *p, | |
300 | unsigned int sdll) | |
301 | { | |
302 | unsigned char *desc = p; | |
303 | unsigned int start = 0; | |
304 | int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; | |
305 | ||
306 | if (offset != 0) { | |
307 | pr_err("XCOPY segment descriptor list length is not" | |
308 | " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); | |
309 | return -EINVAL; | |
310 | } | |
311 | ||
312 | while (start < sdll) { | |
313 | /* | |
314 | * Check segment descriptor type code for block -> block | |
315 | */ | |
316 | switch (desc[0]) { | |
317 | case 0x02: | |
318 | rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); | |
319 | if (rc < 0) | |
320 | goto out; | |
321 | ||
322 | ret++; | |
323 | start += XCOPY_SEGMENT_DESC_LEN; | |
324 | desc += XCOPY_SEGMENT_DESC_LEN; | |
325 | break; | |
326 | default: | |
6774def6 | 327 | pr_err("XCOPY unsupported segment descriptor" |
cbf031f4 NB |
328 | "type: 0x%02x\n", desc[0]); |
329 | goto out; | |
330 | } | |
331 | } | |
332 | ||
333 | return ret; | |
334 | ||
335 | out: | |
336 | return -EINVAL; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Start xcopy_pt ops | |
341 | */ | |
342 | ||
343 | struct xcopy_pt_cmd { | |
344 | bool remote_port; | |
345 | struct se_cmd se_cmd; | |
346 | struct xcopy_op *xcopy_op; | |
347 | struct completion xpt_passthrough_sem; | |
366bda19 | 348 | unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; |
cbf031f4 NB |
349 | }; |
350 | ||
351 | static struct se_port xcopy_pt_port; | |
352 | static struct se_portal_group xcopy_pt_tpg; | |
353 | static struct se_session xcopy_pt_sess; | |
354 | static struct se_node_acl xcopy_pt_nacl; | |
355 | ||
356 | static char *xcopy_pt_get_fabric_name(void) | |
357 | { | |
358 | return "xcopy-pt"; | |
359 | } | |
360 | ||
361 | static u32 xcopy_pt_get_tag(struct se_cmd *se_cmd) | |
362 | { | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) | |
367 | { | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) | |
372 | { | |
cbf031f4 NB |
373 | struct se_device *remote_dev; |
374 | ||
375 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
376 | remote_dev = xop->dst_dev; | |
377 | else | |
378 | remote_dev = xop->src_dev; | |
379 | ||
d588cf8f | 380 | pr_debug("Calling configfs_undepend_item for" |
cbf031f4 | 381 | " remote_dev: %p remote_dev->dev_group: %p\n", |
d588cf8f | 382 | remote_dev, &remote_dev->dev_group.cg_item); |
cbf031f4 | 383 | |
d588cf8f | 384 | target_undepend_item(&remote_dev->dev_group.cg_item); |
cbf031f4 NB |
385 | } |
386 | ||
387 | static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) | |
388 | { | |
389 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
390 | struct xcopy_pt_cmd, se_cmd); | |
391 | ||
cbf031f4 NB |
392 | kfree(xpt_cmd); |
393 | } | |
394 | ||
395 | static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) | |
396 | { | |
397 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
398 | struct xcopy_pt_cmd, se_cmd); | |
399 | ||
400 | complete(&xpt_cmd->xpt_passthrough_sem); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static int xcopy_pt_write_pending(struct se_cmd *se_cmd) | |
405 | { | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) | |
410 | { | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) | |
415 | { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int xcopy_pt_queue_status(struct se_cmd *se_cmd) | |
420 | { | |
421 | return 0; | |
422 | } | |
423 | ||
9ac8928e | 424 | static const struct target_core_fabric_ops xcopy_pt_tfo = { |
cbf031f4 NB |
425 | .get_fabric_name = xcopy_pt_get_fabric_name, |
426 | .get_task_tag = xcopy_pt_get_tag, | |
427 | .get_cmd_state = xcopy_pt_get_cmd_state, | |
428 | .release_cmd = xcopy_pt_release_cmd, | |
429 | .check_stop_free = xcopy_pt_check_stop_free, | |
430 | .write_pending = xcopy_pt_write_pending, | |
431 | .write_pending_status = xcopy_pt_write_pending_status, | |
432 | .queue_data_in = xcopy_pt_queue_data_in, | |
433 | .queue_status = xcopy_pt_queue_status, | |
434 | }; | |
435 | ||
436 | /* | |
437 | * End xcopy_pt_ops | |
438 | */ | |
439 | ||
440 | int target_xcopy_setup_pt(void) | |
441 | { | |
442 | xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); | |
443 | if (!xcopy_wq) { | |
444 | pr_err("Unable to allocate xcopy_wq\n"); | |
445 | return -ENOMEM; | |
446 | } | |
447 | ||
448 | memset(&xcopy_pt_port, 0, sizeof(struct se_port)); | |
449 | INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); | |
450 | INIT_LIST_HEAD(&xcopy_pt_port.sep_list); | |
451 | mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); | |
452 | ||
453 | memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); | |
454 | INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); | |
455 | INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); | |
456 | INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); | |
457 | ||
458 | xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; | |
459 | xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; | |
460 | ||
461 | memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); | |
462 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); | |
463 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); | |
464 | memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); | |
465 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); | |
466 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); | |
467 | ||
468 | xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; | |
469 | xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; | |
470 | ||
471 | xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; | |
472 | xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
477 | void target_xcopy_release_pt(void) | |
478 | { | |
479 | if (xcopy_wq) | |
480 | destroy_workqueue(xcopy_wq); | |
481 | } | |
482 | ||
483 | static void target_xcopy_setup_pt_port( | |
484 | struct xcopy_pt_cmd *xpt_cmd, | |
485 | struct xcopy_op *xop, | |
486 | bool remote_port) | |
487 | { | |
488 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
489 | struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; | |
490 | ||
491 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) { | |
492 | /* | |
493 | * Honor destination port reservations for X-COPY PUSH emulation | |
494 | * when CDB is received on local source port, and READs blocks to | |
495 | * WRITE on remote destination port. | |
496 | */ | |
497 | if (remote_port) { | |
498 | xpt_cmd->remote_port = remote_port; | |
499 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
500 | pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" | |
501 | " cmd->se_lun->lun_sep for X-COPY data PUSH\n", | |
502 | pt_cmd->se_lun->lun_sep); | |
503 | } else { | |
504 | pt_cmd->se_lun = ec_cmd->se_lun; | |
505 | pt_cmd->se_dev = ec_cmd->se_dev; | |
506 | ||
507 | pr_debug("Honoring local SRC port from ec_cmd->se_dev:" | |
508 | " %p\n", pt_cmd->se_dev); | |
509 | pt_cmd->se_lun = ec_cmd->se_lun; | |
510 | pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", | |
511 | pt_cmd->se_lun); | |
512 | } | |
513 | } else { | |
514 | /* | |
515 | * Honor source port reservation for X-COPY PULL emulation | |
516 | * when CDB is received on local desintation port, and READs | |
517 | * blocks from the remote source port to WRITE on local | |
518 | * destination port. | |
519 | */ | |
520 | if (remote_port) { | |
521 | xpt_cmd->remote_port = remote_port; | |
522 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
523 | pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" | |
524 | " cmd->se_lun->lun_sep for X-COPY data PULL\n", | |
525 | pt_cmd->se_lun->lun_sep); | |
526 | } else { | |
527 | pt_cmd->se_lun = ec_cmd->se_lun; | |
528 | pt_cmd->se_dev = ec_cmd->se_dev; | |
529 | ||
530 | pr_debug("Honoring local DST port from ec_cmd->se_dev:" | |
531 | " %p\n", pt_cmd->se_dev); | |
532 | pt_cmd->se_lun = ec_cmd->se_lun; | |
533 | pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", | |
534 | pt_cmd->se_lun); | |
535 | } | |
536 | } | |
537 | } | |
538 | ||
2c336e3a CH |
539 | static void target_xcopy_init_pt_lun(struct se_device *se_dev, |
540 | struct se_cmd *pt_cmd, bool remote_port) | |
cbf031f4 NB |
541 | { |
542 | /* | |
543 | * Don't allocate + init an pt_cmd->se_lun if honoring local port for | |
544 | * reservations. The pt_cmd->se_lun pointer will be setup from within | |
545 | * target_xcopy_setup_pt_port() | |
546 | */ | |
2c336e3a CH |
547 | if (remote_port) { |
548 | pr_debug("Setup emulated se_dev: %p from se_dev\n", | |
549 | pt_cmd->se_dev); | |
550 | pt_cmd->se_lun = &se_dev->xcopy_lun; | |
551 | pt_cmd->se_dev = se_dev; | |
cbf031f4 NB |
552 | } |
553 | ||
c3d0a7c2 | 554 | pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
cbf031f4 NB |
555 | } |
556 | ||
557 | static int target_xcopy_setup_pt_cmd( | |
558 | struct xcopy_pt_cmd *xpt_cmd, | |
559 | struct xcopy_op *xop, | |
560 | struct se_device *se_dev, | |
561 | unsigned char *cdb, | |
562 | bool remote_port, | |
563 | bool alloc_mem) | |
564 | { | |
565 | struct se_cmd *cmd = &xpt_cmd->se_cmd; | |
566 | sense_reason_t sense_rc; | |
567 | int ret = 0, rc; | |
568 | /* | |
569 | * Setup LUN+port to honor reservations based upon xop->op_origin for | |
570 | * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. | |
571 | */ | |
2c336e3a CH |
572 | target_xcopy_init_pt_lun(se_dev, cmd, remote_port); |
573 | ||
cbf031f4 NB |
574 | xpt_cmd->xcopy_op = xop; |
575 | target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); | |
576 | ||
577 | sense_rc = target_setup_cmd_from_cdb(cmd, cdb); | |
578 | if (sense_rc) { | |
579 | ret = -EINVAL; | |
580 | goto out; | |
581 | } | |
582 | ||
583 | if (alloc_mem) { | |
584 | rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, | |
585 | cmd->data_length, false); | |
586 | if (rc < 0) { | |
587 | ret = rc; | |
588 | goto out; | |
589 | } | |
590 | /* | |
591 | * Set this bit so that transport_free_pages() allows the | |
592 | * caller to release SGLs + physical memory allocated by | |
593 | * transport_generic_get_mem().. | |
594 | */ | |
595 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
596 | } else { | |
597 | /* | |
598 | * Here the previously allocated SGLs for the internal READ | |
599 | * are mapped zero-copy to the internal WRITE. | |
600 | */ | |
601 | sense_rc = transport_generic_map_mem_to_cmd(cmd, | |
602 | xop->xop_data_sg, xop->xop_data_nents, | |
603 | NULL, 0); | |
604 | if (sense_rc) { | |
605 | ret = -EINVAL; | |
606 | goto out; | |
607 | } | |
608 | ||
609 | pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" | |
610 | " %u\n", cmd->t_data_sg, cmd->t_data_nents); | |
611 | } | |
612 | ||
613 | return 0; | |
614 | ||
615 | out: | |
cbf031f4 NB |
616 | return ret; |
617 | } | |
618 | ||
619 | static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) | |
620 | { | |
621 | struct se_cmd *se_cmd = &xpt_cmd->se_cmd; | |
622 | sense_reason_t sense_rc; | |
623 | ||
624 | sense_rc = transport_generic_new_cmd(se_cmd); | |
625 | if (sense_rc) | |
626 | return -EINVAL; | |
627 | ||
628 | if (se_cmd->data_direction == DMA_TO_DEVICE) | |
629 | target_execute_cmd(se_cmd); | |
630 | ||
631 | wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); | |
632 | ||
633 | pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", | |
634 | se_cmd->scsi_status); | |
8a955d6d NB |
635 | |
636 | return (se_cmd->scsi_status) ? -EINVAL : 0; | |
cbf031f4 NB |
637 | } |
638 | ||
639 | static int target_xcopy_read_source( | |
640 | struct se_cmd *ec_cmd, | |
641 | struct xcopy_op *xop, | |
642 | struct se_device *src_dev, | |
643 | sector_t src_lba, | |
644 | u32 src_sectors) | |
645 | { | |
646 | struct xcopy_pt_cmd *xpt_cmd; | |
647 | struct se_cmd *se_cmd; | |
648 | u32 length = (src_sectors * src_dev->dev_attrib.block_size); | |
649 | int rc; | |
650 | unsigned char cdb[16]; | |
651 | bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); | |
652 | ||
653 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
654 | if (!xpt_cmd) { | |
655 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
656 | return -ENOMEM; | |
657 | } | |
658 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
659 | se_cmd = &xpt_cmd->se_cmd; | |
660 | ||
661 | memset(&cdb[0], 0, 16); | |
662 | cdb[0] = READ_16; | |
663 | put_unaligned_be64(src_lba, &cdb[2]); | |
664 | put_unaligned_be32(src_sectors, &cdb[10]); | |
665 | pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", | |
666 | (unsigned long long)src_lba, src_sectors, length); | |
667 | ||
668 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 669 | DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
670 | xop->src_pt_cmd = xpt_cmd; |
671 | ||
672 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], | |
673 | remote_port, true); | |
674 | if (rc < 0) { | |
675 | transport_generic_free_cmd(se_cmd, 0); | |
676 | return rc; | |
677 | } | |
678 | ||
679 | xop->xop_data_sg = se_cmd->t_data_sg; | |
680 | xop->xop_data_nents = se_cmd->t_data_nents; | |
681 | pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" | |
682 | " memory\n", xop->xop_data_sg, xop->xop_data_nents); | |
683 | ||
684 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
685 | if (rc < 0) { | |
686 | transport_generic_free_cmd(se_cmd, 0); | |
687 | return rc; | |
688 | } | |
689 | /* | |
690 | * Clear off the allocated t_data_sg, that has been saved for | |
691 | * zero-copy WRITE submission reuse in struct xcopy_op.. | |
692 | */ | |
693 | se_cmd->t_data_sg = NULL; | |
694 | se_cmd->t_data_nents = 0; | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static int target_xcopy_write_destination( | |
700 | struct se_cmd *ec_cmd, | |
701 | struct xcopy_op *xop, | |
702 | struct se_device *dst_dev, | |
703 | sector_t dst_lba, | |
704 | u32 dst_sectors) | |
705 | { | |
706 | struct xcopy_pt_cmd *xpt_cmd; | |
707 | struct se_cmd *se_cmd; | |
708 | u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); | |
709 | int rc; | |
710 | unsigned char cdb[16]; | |
711 | bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); | |
712 | ||
713 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
714 | if (!xpt_cmd) { | |
715 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
716 | return -ENOMEM; | |
717 | } | |
718 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
719 | se_cmd = &xpt_cmd->se_cmd; | |
720 | ||
721 | memset(&cdb[0], 0, 16); | |
722 | cdb[0] = WRITE_16; | |
723 | put_unaligned_be64(dst_lba, &cdb[2]); | |
724 | put_unaligned_be32(dst_sectors, &cdb[10]); | |
725 | pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", | |
726 | (unsigned long long)dst_lba, dst_sectors, length); | |
727 | ||
728 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 729 | DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
730 | xop->dst_pt_cmd = xpt_cmd; |
731 | ||
732 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], | |
733 | remote_port, false); | |
734 | if (rc < 0) { | |
735 | struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; | |
736 | /* | |
737 | * If the failure happened before the t_mem_list hand-off in | |
738 | * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that | |
739 | * core releases this memory on error during X-COPY WRITE I/O. | |
740 | */ | |
741 | src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
742 | src_cmd->t_data_sg = xop->xop_data_sg; | |
743 | src_cmd->t_data_nents = xop->xop_data_nents; | |
744 | ||
745 | transport_generic_free_cmd(se_cmd, 0); | |
746 | return rc; | |
747 | } | |
748 | ||
749 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
750 | if (rc < 0) { | |
751 | se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
752 | transport_generic_free_cmd(se_cmd, 0); | |
753 | return rc; | |
754 | } | |
755 | ||
756 | return 0; | |
757 | } | |
758 | ||
759 | static void target_xcopy_do_work(struct work_struct *work) | |
760 | { | |
761 | struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); | |
762 | struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; | |
763 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
764 | sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; | |
765 | unsigned int max_sectors; | |
766 | int rc; | |
767 | unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; | |
768 | ||
769 | end_lba = src_lba + nolb; | |
770 | /* | |
771 | * Break up XCOPY I/O into hw_max_sectors sized I/O based on the | |
772 | * smallest max_sectors between src_dev + dev_dev, or | |
773 | */ | |
774 | max_sectors = min(src_dev->dev_attrib.hw_max_sectors, | |
775 | dst_dev->dev_attrib.hw_max_sectors); | |
776 | max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); | |
777 | ||
778 | max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); | |
779 | ||
780 | pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", | |
781 | nolb, max_nolb, (unsigned long long)end_lba); | |
782 | pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", | |
783 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
784 | ||
785 | while (src_lba < end_lba) { | |
786 | cur_nolb = min(nolb, max_nolb); | |
787 | ||
788 | pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," | |
789 | " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); | |
790 | ||
791 | rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); | |
792 | if (rc < 0) | |
793 | goto out; | |
794 | ||
795 | src_lba += cur_nolb; | |
796 | pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", | |
797 | (unsigned long long)src_lba); | |
798 | ||
799 | pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," | |
800 | " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); | |
801 | ||
802 | rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, | |
803 | dst_lba, cur_nolb); | |
804 | if (rc < 0) { | |
805 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
806 | goto out; | |
807 | } | |
808 | ||
809 | dst_lba += cur_nolb; | |
810 | pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", | |
811 | (unsigned long long)dst_lba); | |
812 | ||
813 | copied_nolb += cur_nolb; | |
814 | nolb -= cur_nolb; | |
815 | ||
816 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
817 | xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
818 | ||
819 | transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); | |
820 | } | |
821 | ||
822 | xcopy_pt_undepend_remotedev(xop); | |
823 | kfree(xop); | |
824 | ||
825 | pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", | |
826 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
827 | pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", | |
828 | copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); | |
829 | ||
830 | pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); | |
831 | target_complete_cmd(ec_cmd, SAM_STAT_GOOD); | |
832 | return; | |
833 | ||
834 | out: | |
835 | xcopy_pt_undepend_remotedev(xop); | |
836 | kfree(xop); | |
837 | ||
838 | pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); | |
839 | ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
840 | target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); | |
841 | } | |
842 | ||
843 | sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) | |
844 | { | |
acb3f260 | 845 | struct se_device *dev = se_cmd->se_dev; |
cbf031f4 NB |
846 | struct xcopy_op *xop = NULL; |
847 | unsigned char *p = NULL, *seg_desc; | |
848 | unsigned int list_id, list_id_usage, sdll, inline_dl, sa; | |
48502ddb | 849 | sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; |
cbf031f4 NB |
850 | int rc; |
851 | unsigned short tdll; | |
852 | ||
acb3f260 NB |
853 | if (!dev->dev_attrib.emulate_3pc) { |
854 | pr_err("EXTENDED_COPY operation explicitly disabled\n"); | |
855 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
856 | } | |
857 | ||
cbf031f4 NB |
858 | sa = se_cmd->t_task_cdb[1] & 0x1f; |
859 | if (sa != 0x00) { | |
860 | pr_err("EXTENDED_COPY(LID4) not supported\n"); | |
861 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
862 | } | |
863 | ||
934a138e NB |
864 | xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); |
865 | if (!xop) { | |
866 | pr_err("Unable to allocate xcopy_op\n"); | |
867 | return TCM_OUT_OF_RESOURCES; | |
868 | } | |
869 | xop->xop_se_cmd = se_cmd; | |
870 | ||
cbf031f4 NB |
871 | p = transport_kmap_data_sg(se_cmd); |
872 | if (!p) { | |
873 | pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); | |
934a138e | 874 | kfree(xop); |
cbf031f4 NB |
875 | return TCM_OUT_OF_RESOURCES; |
876 | } | |
877 | ||
878 | list_id = p[0]; | |
3f7a46c6 NB |
879 | list_id_usage = (p[1] & 0x18) >> 3; |
880 | ||
cbf031f4 NB |
881 | /* |
882 | * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH | |
883 | */ | |
884 | tdll = get_unaligned_be16(&p[2]); | |
885 | sdll = get_unaligned_be32(&p[8]); | |
886 | ||
887 | inline_dl = get_unaligned_be32(&p[12]); | |
888 | if (inline_dl != 0) { | |
889 | pr_err("XCOPY with non zero inline data length\n"); | |
890 | goto out; | |
891 | } | |
892 | ||
cbf031f4 NB |
893 | pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" |
894 | " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, | |
895 | tdll, sdll, inline_dl); | |
896 | ||
897 | rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); | |
898 | if (rc <= 0) | |
899 | goto out; | |
900 | ||
48502ddb NB |
901 | if (xop->src_dev->dev_attrib.block_size != |
902 | xop->dst_dev->dev_attrib.block_size) { | |
903 | pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" | |
904 | " block_size: %u currently unsupported\n", | |
905 | xop->src_dev->dev_attrib.block_size, | |
906 | xop->dst_dev->dev_attrib.block_size); | |
907 | xcopy_pt_undepend_remotedev(xop); | |
908 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
909 | goto out; | |
910 | } | |
911 | ||
cbf031f4 NB |
912 | pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, |
913 | rc * XCOPY_TARGET_DESC_LEN); | |
914 | seg_desc = &p[16]; | |
915 | seg_desc += (rc * XCOPY_TARGET_DESC_LEN); | |
916 | ||
917 | rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); | |
918 | if (rc <= 0) { | |
919 | xcopy_pt_undepend_remotedev(xop); | |
920 | goto out; | |
921 | } | |
922 | transport_kunmap_data_sg(se_cmd); | |
923 | ||
924 | pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, | |
925 | rc * XCOPY_SEGMENT_DESC_LEN); | |
926 | INIT_WORK(&xop->xop_work, target_xcopy_do_work); | |
927 | queue_work(xcopy_wq, &xop->xop_work); | |
928 | return TCM_NO_SENSE; | |
929 | ||
930 | out: | |
931 | if (p) | |
932 | transport_kunmap_data_sg(se_cmd); | |
933 | kfree(xop); | |
48502ddb | 934 | return ret; |
cbf031f4 NB |
935 | } |
936 | ||
937 | static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) | |
938 | { | |
939 | unsigned char *p; | |
940 | ||
941 | p = transport_kmap_data_sg(se_cmd); | |
942 | if (!p) { | |
943 | pr_err("transport_kmap_data_sg failed in" | |
944 | " target_rcr_operating_parameters\n"); | |
945 | return TCM_OUT_OF_RESOURCES; | |
946 | } | |
947 | ||
948 | if (se_cmd->data_length < 54) { | |
949 | pr_err("Receive Copy Results Op Parameters length" | |
950 | " too small: %u\n", se_cmd->data_length); | |
951 | transport_kunmap_data_sg(se_cmd); | |
952 | return TCM_INVALID_CDB_FIELD; | |
953 | } | |
954 | /* | |
955 | * Set SNLID=1 (Supports no List ID) | |
956 | */ | |
957 | p[4] = 0x1; | |
958 | /* | |
959 | * MAXIMUM TARGET DESCRIPTOR COUNT | |
960 | */ | |
961 | put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); | |
962 | /* | |
963 | * MAXIMUM SEGMENT DESCRIPTOR COUNT | |
964 | */ | |
965 | put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); | |
966 | /* | |
967 | * MAXIMUM DESCRIPTOR LIST LENGTH | |
968 | */ | |
969 | put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); | |
970 | /* | |
971 | * MAXIMUM SEGMENT LENGTH | |
972 | */ | |
973 | put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); | |
974 | /* | |
975 | * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) | |
976 | */ | |
977 | put_unaligned_be32(0x0, &p[20]); | |
978 | /* | |
979 | * HELD DATA LIMIT | |
980 | */ | |
981 | put_unaligned_be32(0x0, &p[24]); | |
982 | /* | |
983 | * MAXIMUM STREAM DEVICE TRANSFER SIZE | |
984 | */ | |
985 | put_unaligned_be32(0x0, &p[28]); | |
986 | /* | |
987 | * TOTAL CONCURRENT COPIES | |
988 | */ | |
989 | put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); | |
990 | /* | |
991 | * MAXIMUM CONCURRENT COPIES | |
992 | */ | |
993 | p[36] = RCR_OP_MAX_CONCURR_COPIES; | |
994 | /* | |
995 | * DATA SEGMENT GRANULARITY (log 2) | |
996 | */ | |
997 | p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; | |
998 | /* | |
999 | * INLINE DATA GRANULARITY log 2) | |
1000 | */ | |
1001 | p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; | |
1002 | /* | |
1003 | * HELD DATA GRANULARITY | |
1004 | */ | |
1005 | p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; | |
1006 | /* | |
1007 | * IMPLEMENTED DESCRIPTOR LIST LENGTH | |
1008 | */ | |
1009 | p[43] = 0x2; | |
1010 | /* | |
1011 | * List of implemented descriptor type codes (ordered) | |
1012 | */ | |
1013 | p[44] = 0x02; /* Copy Block to Block device */ | |
1014 | p[45] = 0xe4; /* Identification descriptor target descriptor */ | |
1015 | ||
1016 | /* | |
1017 | * AVAILABLE DATA (n-3) | |
1018 | */ | |
1019 | put_unaligned_be32(42, &p[0]); | |
1020 | ||
1021 | transport_kunmap_data_sg(se_cmd); | |
1022 | target_complete_cmd(se_cmd, GOOD); | |
1023 | ||
1024 | return TCM_NO_SENSE; | |
1025 | } | |
1026 | ||
1027 | sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) | |
1028 | { | |
1029 | unsigned char *cdb = &se_cmd->t_task_cdb[0]; | |
1030 | int sa = (cdb[1] & 0x1f), list_id = cdb[2]; | |
1031 | sense_reason_t rc = TCM_NO_SENSE; | |
1032 | ||
1033 | pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" | |
1034 | " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); | |
1035 | ||
1036 | if (list_id != 0) { | |
1037 | pr_err("Receive Copy Results with non zero list identifier" | |
1038 | " not supported\n"); | |
1039 | return TCM_INVALID_CDB_FIELD; | |
1040 | } | |
1041 | ||
1042 | switch (sa) { | |
1043 | case RCR_SA_OPERATING_PARAMETERS: | |
1044 | rc = target_rcr_operating_parameters(se_cmd); | |
1045 | break; | |
1046 | case RCR_SA_COPY_STATUS: | |
1047 | case RCR_SA_RECEIVE_DATA: | |
1048 | case RCR_SA_FAILED_SEGMENT_DETAILS: | |
1049 | default: | |
1050 | pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); | |
1051 | return TCM_INVALID_CDB_FIELD; | |
1052 | } | |
1053 | ||
1054 | return rc; | |
1055 | } |