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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> | |
28 | #include <scsi/scsi.h> | |
29 | #include <scsi/scsi_cmnd.h> | |
30 | #include <asm/unaligned.h> | |
31 | ||
32 | #include <target/target_core_base.h> | |
33 | #include <target/target_core_backend.h> | |
34 | #include <target/target_core_fabric.h> | |
35 | #include <target/target_core_configfs.h> | |
36 | ||
b13876d2 | 37 | #include "target_core_internal.h" |
cbf031f4 NB |
38 | #include "target_core_pr.h" |
39 | #include "target_core_ua.h" | |
40 | #include "target_core_xcopy.h" | |
41 | ||
42 | static struct workqueue_struct *xcopy_wq = NULL; | |
cbf031f4 NB |
43 | |
44 | static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) | |
45 | { | |
46 | int off = 0; | |
47 | ||
48 | buf[off++] = (0x6 << 4); | |
49 | buf[off++] = 0x01; | |
50 | buf[off++] = 0x40; | |
51 | buf[off] = (0x5 << 4); | |
52 | ||
53 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
58 | bool src) | |
59 | { | |
60 | struct se_device *se_dev; | |
cbf031f4 NB |
61 | unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; |
62 | int rc; | |
63 | ||
0bcc297e | 64 | if (src) |
cbf031f4 NB |
65 | dev_wwn = &xop->dst_tid_wwn[0]; |
66 | else | |
67 | dev_wwn = &xop->src_tid_wwn[0]; | |
68 | ||
69 | mutex_lock(&g_device_mutex); | |
70 | list_for_each_entry(se_dev, &g_device_list, g_dev_node) { | |
71 | ||
acb3f260 NB |
72 | if (!se_dev->dev_attrib.emulate_3pc) |
73 | continue; | |
74 | ||
cbf031f4 NB |
75 | memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); |
76 | target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); | |
77 | ||
78 | rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); | |
79 | if (rc != 0) | |
80 | continue; | |
81 | ||
0bcc297e | 82 | if (src) { |
cbf031f4 NB |
83 | xop->dst_dev = se_dev; |
84 | pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" | |
85 | " se_dev\n", xop->dst_dev); | |
86 | } else { | |
87 | xop->src_dev = se_dev; | |
88 | pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" | |
89 | " se_dev\n", xop->src_dev); | |
90 | } | |
91 | ||
d588cf8f | 92 | rc = target_depend_item(&se_dev->dev_group.cg_item); |
cbf031f4 NB |
93 | if (rc != 0) { |
94 | pr_err("configfs_depend_item attempt failed:" | |
95 | " %d for se_dev: %p\n", rc, se_dev); | |
96 | mutex_unlock(&g_device_mutex); | |
97 | return rc; | |
98 | } | |
99 | ||
d588cf8f CH |
100 | pr_debug("Called configfs_depend_item for se_dev: %p" |
101 | " se_dev->se_dev_group: %p\n", se_dev, | |
cbf031f4 NB |
102 | &se_dev->dev_group); |
103 | ||
104 | mutex_unlock(&g_device_mutex); | |
105 | return 0; | |
106 | } | |
107 | mutex_unlock(&g_device_mutex); | |
108 | ||
109 | pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
114 | unsigned char *p, bool src) | |
115 | { | |
116 | unsigned char *desc = p; | |
117 | unsigned short ript; | |
118 | u8 desig_len; | |
119 | /* | |
120 | * Extract RELATIVE INITIATOR PORT IDENTIFIER | |
121 | */ | |
122 | ript = get_unaligned_be16(&desc[2]); | |
123 | pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); | |
124 | /* | |
125 | * Check for supported code set, association, and designator type | |
126 | */ | |
127 | if ((desc[4] & 0x0f) != 0x1) { | |
128 | pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); | |
129 | return -EINVAL; | |
130 | } | |
131 | if ((desc[5] & 0x30) != 0x00) { | |
132 | pr_err("XCOPY 0xe4: association other than LUN not supported\n"); | |
133 | return -EINVAL; | |
134 | } | |
135 | if ((desc[5] & 0x0f) != 0x3) { | |
136 | pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", | |
137 | (desc[5] & 0x0f)); | |
138 | return -EINVAL; | |
139 | } | |
140 | /* | |
141 | * Check for matching 16 byte length for NAA IEEE Registered Extended | |
142 | * Assigned designator | |
143 | */ | |
144 | desig_len = desc[7]; | |
145 | if (desig_len != 16) { | |
146 | pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); | |
147 | return -EINVAL; | |
148 | } | |
149 | pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); | |
150 | /* | |
151 | * Check for NAA IEEE Registered Extended Assigned header.. | |
152 | */ | |
153 | if ((desc[8] & 0xf0) != 0x60) { | |
154 | pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", | |
155 | (desc[8] & 0xf0)); | |
156 | return -EINVAL; | |
157 | } | |
158 | ||
0bcc297e | 159 | if (src) { |
cbf031f4 NB |
160 | memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
161 | /* | |
162 | * Determine if the source designator matches the local device | |
163 | */ | |
164 | if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], | |
165 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
166 | xop->op_origin = XCOL_SOURCE_RECV_OP; | |
167 | xop->src_dev = se_cmd->se_dev; | |
168 | pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" | |
169 | " received xop\n", xop->src_dev); | |
170 | } | |
171 | } else { | |
172 | memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); | |
173 | /* | |
174 | * Determine if the destination designator matches the local device | |
175 | */ | |
176 | if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], | |
177 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
178 | xop->op_origin = XCOL_DEST_RECV_OP; | |
179 | xop->dst_dev = se_cmd->se_dev; | |
180 | pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" | |
181 | " received xop\n", xop->dst_dev); | |
182 | } | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, | |
189 | struct xcopy_op *xop, unsigned char *p, | |
190 | unsigned short tdll) | |
191 | { | |
192 | struct se_device *local_dev = se_cmd->se_dev; | |
193 | unsigned char *desc = p; | |
194 | int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; | |
195 | unsigned short start = 0; | |
196 | bool src = true; | |
197 | ||
198 | if (offset != 0) { | |
199 | pr_err("XCOPY target descriptor list length is not" | |
200 | " multiple of %d\n", XCOPY_TARGET_DESC_LEN); | |
201 | return -EINVAL; | |
202 | } | |
203 | if (tdll > 64) { | |
204 | pr_err("XCOPY target descriptor supports a maximum" | |
205 | " two src/dest descriptors, tdll: %hu too large..\n", tdll); | |
206 | return -EINVAL; | |
207 | } | |
208 | /* | |
209 | * Generate an IEEE Registered Extended designator based upon the | |
210 | * se_device the XCOPY was received upon.. | |
211 | */ | |
212 | memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); | |
213 | target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); | |
214 | ||
215 | while (start < tdll) { | |
216 | /* | |
217 | * Check target descriptor identification with 0xE4 type with | |
218 | * use VPD 0x83 WWPN matching .. | |
219 | */ | |
220 | switch (desc[0]) { | |
221 | case 0xe4: | |
222 | rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, | |
223 | &desc[0], src); | |
224 | if (rc != 0) | |
225 | goto out; | |
226 | /* | |
227 | * Assume target descriptors are in source -> destination order.. | |
228 | */ | |
0bcc297e | 229 | if (src) |
cbf031f4 NB |
230 | src = false; |
231 | else | |
232 | src = true; | |
233 | start += XCOPY_TARGET_DESC_LEN; | |
234 | desc += XCOPY_TARGET_DESC_LEN; | |
235 | ret++; | |
236 | break; | |
237 | default: | |
238 | pr_err("XCOPY unsupported descriptor type code:" | |
239 | " 0x%02x\n", desc[0]); | |
240 | goto out; | |
241 | } | |
242 | } | |
243 | ||
244 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
245 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); | |
246 | else | |
247 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); | |
248 | ||
249 | if (rc < 0) | |
250 | goto out; | |
251 | ||
252 | pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", | |
253 | xop->src_dev, &xop->src_tid_wwn[0]); | |
254 | pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", | |
255 | xop->dst_dev, &xop->dst_tid_wwn[0]); | |
256 | ||
257 | return ret; | |
258 | ||
259 | out: | |
260 | return -EINVAL; | |
261 | } | |
262 | ||
263 | static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
264 | unsigned char *p) | |
265 | { | |
266 | unsigned char *desc = p; | |
267 | int dc = (desc[1] & 0x02); | |
268 | unsigned short desc_len; | |
269 | ||
270 | desc_len = get_unaligned_be16(&desc[2]); | |
271 | if (desc_len != 0x18) { | |
272 | pr_err("XCOPY segment desc 0x02: Illegal desc_len:" | |
273 | " %hu\n", desc_len); | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | xop->stdi = get_unaligned_be16(&desc[4]); | |
278 | xop->dtdi = get_unaligned_be16(&desc[6]); | |
279 | pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", | |
280 | desc_len, xop->stdi, xop->dtdi, dc); | |
281 | ||
282 | xop->nolb = get_unaligned_be16(&desc[10]); | |
283 | xop->src_lba = get_unaligned_be64(&desc[12]); | |
284 | xop->dst_lba = get_unaligned_be64(&desc[20]); | |
285 | pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", | |
286 | xop->nolb, (unsigned long long)xop->src_lba, | |
287 | (unsigned long long)xop->dst_lba); | |
288 | ||
289 | if (dc != 0) { | |
3e9e01de NB |
290 | xop->dbl = (desc[29] & 0xff) << 16; |
291 | xop->dbl |= (desc[30] & 0xff) << 8; | |
cbf031f4 NB |
292 | xop->dbl |= desc[31] & 0xff; |
293 | ||
294 | pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); | |
295 | } | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, | |
300 | struct xcopy_op *xop, unsigned char *p, | |
301 | unsigned int sdll) | |
302 | { | |
303 | unsigned char *desc = p; | |
304 | unsigned int start = 0; | |
305 | int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; | |
306 | ||
307 | if (offset != 0) { | |
308 | pr_err("XCOPY segment descriptor list length is not" | |
309 | " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
313 | while (start < sdll) { | |
314 | /* | |
315 | * Check segment descriptor type code for block -> block | |
316 | */ | |
317 | switch (desc[0]) { | |
318 | case 0x02: | |
319 | rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); | |
320 | if (rc < 0) | |
321 | goto out; | |
322 | ||
323 | ret++; | |
324 | start += XCOPY_SEGMENT_DESC_LEN; | |
325 | desc += XCOPY_SEGMENT_DESC_LEN; | |
326 | break; | |
327 | default: | |
6774def6 | 328 | pr_err("XCOPY unsupported segment descriptor" |
cbf031f4 NB |
329 | "type: 0x%02x\n", desc[0]); |
330 | goto out; | |
331 | } | |
332 | } | |
333 | ||
334 | return ret; | |
335 | ||
336 | out: | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Start xcopy_pt ops | |
342 | */ | |
343 | ||
344 | struct xcopy_pt_cmd { | |
345 | bool remote_port; | |
346 | struct se_cmd se_cmd; | |
347 | struct xcopy_op *xcopy_op; | |
348 | struct completion xpt_passthrough_sem; | |
366bda19 | 349 | unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; |
cbf031f4 NB |
350 | }; |
351 | ||
352 | static struct se_port xcopy_pt_port; | |
353 | static struct se_portal_group xcopy_pt_tpg; | |
354 | static struct se_session xcopy_pt_sess; | |
355 | static struct se_node_acl xcopy_pt_nacl; | |
356 | ||
357 | static char *xcopy_pt_get_fabric_name(void) | |
358 | { | |
359 | return "xcopy-pt"; | |
360 | } | |
361 | ||
362 | static u32 xcopy_pt_get_tag(struct se_cmd *se_cmd) | |
363 | { | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) | |
368 | { | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) | |
373 | { | |
cbf031f4 NB |
374 | struct se_device *remote_dev; |
375 | ||
376 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
377 | remote_dev = xop->dst_dev; | |
378 | else | |
379 | remote_dev = xop->src_dev; | |
380 | ||
d588cf8f | 381 | pr_debug("Calling configfs_undepend_item for" |
cbf031f4 | 382 | " remote_dev: %p remote_dev->dev_group: %p\n", |
d588cf8f | 383 | remote_dev, &remote_dev->dev_group.cg_item); |
cbf031f4 | 384 | |
d588cf8f | 385 | target_undepend_item(&remote_dev->dev_group.cg_item); |
cbf031f4 NB |
386 | } |
387 | ||
388 | static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) | |
389 | { | |
390 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
391 | struct xcopy_pt_cmd, se_cmd); | |
392 | ||
cbf031f4 NB |
393 | kfree(xpt_cmd); |
394 | } | |
395 | ||
396 | static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) | |
397 | { | |
398 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
399 | struct xcopy_pt_cmd, se_cmd); | |
400 | ||
401 | complete(&xpt_cmd->xpt_passthrough_sem); | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static int xcopy_pt_write_pending(struct se_cmd *se_cmd) | |
406 | { | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static int xcopy_pt_queue_status(struct se_cmd *se_cmd) | |
421 | { | |
422 | return 0; | |
423 | } | |
424 | ||
9ac8928e | 425 | static const struct target_core_fabric_ops xcopy_pt_tfo = { |
cbf031f4 NB |
426 | .get_fabric_name = xcopy_pt_get_fabric_name, |
427 | .get_task_tag = xcopy_pt_get_tag, | |
428 | .get_cmd_state = xcopy_pt_get_cmd_state, | |
429 | .release_cmd = xcopy_pt_release_cmd, | |
430 | .check_stop_free = xcopy_pt_check_stop_free, | |
431 | .write_pending = xcopy_pt_write_pending, | |
432 | .write_pending_status = xcopy_pt_write_pending_status, | |
433 | .queue_data_in = xcopy_pt_queue_data_in, | |
434 | .queue_status = xcopy_pt_queue_status, | |
435 | }; | |
436 | ||
437 | /* | |
438 | * End xcopy_pt_ops | |
439 | */ | |
440 | ||
441 | int target_xcopy_setup_pt(void) | |
442 | { | |
443 | xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); | |
444 | if (!xcopy_wq) { | |
445 | pr_err("Unable to allocate xcopy_wq\n"); | |
446 | return -ENOMEM; | |
447 | } | |
448 | ||
449 | memset(&xcopy_pt_port, 0, sizeof(struct se_port)); | |
450 | INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); | |
451 | INIT_LIST_HEAD(&xcopy_pt_port.sep_list); | |
452 | mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); | |
453 | ||
454 | memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); | |
455 | INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); | |
456 | INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); | |
457 | INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); | |
458 | ||
459 | xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; | |
460 | xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; | |
461 | ||
462 | memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); | |
463 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); | |
464 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); | |
465 | memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); | |
466 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); | |
467 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); | |
468 | ||
469 | xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; | |
470 | xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; | |
471 | ||
472 | xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; | |
473 | xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | void target_xcopy_release_pt(void) | |
479 | { | |
480 | if (xcopy_wq) | |
481 | destroy_workqueue(xcopy_wq); | |
482 | } | |
483 | ||
484 | static void target_xcopy_setup_pt_port( | |
485 | struct xcopy_pt_cmd *xpt_cmd, | |
486 | struct xcopy_op *xop, | |
487 | bool remote_port) | |
488 | { | |
489 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
490 | struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; | |
491 | ||
492 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) { | |
493 | /* | |
494 | * Honor destination port reservations for X-COPY PUSH emulation | |
495 | * when CDB is received on local source port, and READs blocks to | |
496 | * WRITE on remote destination port. | |
497 | */ | |
498 | if (remote_port) { | |
499 | xpt_cmd->remote_port = remote_port; | |
500 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
501 | pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" | |
502 | " cmd->se_lun->lun_sep for X-COPY data PUSH\n", | |
503 | pt_cmd->se_lun->lun_sep); | |
504 | } else { | |
505 | pt_cmd->se_lun = ec_cmd->se_lun; | |
506 | pt_cmd->se_dev = ec_cmd->se_dev; | |
507 | ||
508 | pr_debug("Honoring local SRC port from ec_cmd->se_dev:" | |
509 | " %p\n", pt_cmd->se_dev); | |
510 | pt_cmd->se_lun = ec_cmd->se_lun; | |
511 | pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", | |
512 | pt_cmd->se_lun); | |
513 | } | |
514 | } else { | |
515 | /* | |
516 | * Honor source port reservation for X-COPY PULL emulation | |
517 | * when CDB is received on local desintation port, and READs | |
518 | * blocks from the remote source port to WRITE on local | |
519 | * destination port. | |
520 | */ | |
521 | if (remote_port) { | |
522 | xpt_cmd->remote_port = remote_port; | |
523 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
524 | pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" | |
525 | " cmd->se_lun->lun_sep for X-COPY data PULL\n", | |
526 | pt_cmd->se_lun->lun_sep); | |
527 | } else { | |
528 | pt_cmd->se_lun = ec_cmd->se_lun; | |
529 | pt_cmd->se_dev = ec_cmd->se_dev; | |
530 | ||
531 | pr_debug("Honoring local DST port from ec_cmd->se_dev:" | |
532 | " %p\n", pt_cmd->se_dev); | |
533 | pt_cmd->se_lun = ec_cmd->se_lun; | |
534 | pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", | |
535 | pt_cmd->se_lun); | |
536 | } | |
537 | } | |
538 | } | |
539 | ||
2c336e3a CH |
540 | static void target_xcopy_init_pt_lun(struct se_device *se_dev, |
541 | struct se_cmd *pt_cmd, bool remote_port) | |
cbf031f4 NB |
542 | { |
543 | /* | |
544 | * Don't allocate + init an pt_cmd->se_lun if honoring local port for | |
545 | * reservations. The pt_cmd->se_lun pointer will be setup from within | |
546 | * target_xcopy_setup_pt_port() | |
547 | */ | |
2c336e3a CH |
548 | if (remote_port) { |
549 | pr_debug("Setup emulated se_dev: %p from se_dev\n", | |
550 | pt_cmd->se_dev); | |
551 | pt_cmd->se_lun = &se_dev->xcopy_lun; | |
552 | pt_cmd->se_dev = se_dev; | |
cbf031f4 NB |
553 | } |
554 | ||
c3d0a7c2 | 555 | pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
cbf031f4 NB |
556 | } |
557 | ||
558 | static int target_xcopy_setup_pt_cmd( | |
559 | struct xcopy_pt_cmd *xpt_cmd, | |
560 | struct xcopy_op *xop, | |
561 | struct se_device *se_dev, | |
562 | unsigned char *cdb, | |
563 | bool remote_port, | |
564 | bool alloc_mem) | |
565 | { | |
566 | struct se_cmd *cmd = &xpt_cmd->se_cmd; | |
567 | sense_reason_t sense_rc; | |
568 | int ret = 0, rc; | |
569 | /* | |
570 | * Setup LUN+port to honor reservations based upon xop->op_origin for | |
571 | * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. | |
572 | */ | |
2c336e3a CH |
573 | target_xcopy_init_pt_lun(se_dev, cmd, remote_port); |
574 | ||
cbf031f4 NB |
575 | xpt_cmd->xcopy_op = xop; |
576 | target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); | |
577 | ||
578 | sense_rc = target_setup_cmd_from_cdb(cmd, cdb); | |
579 | if (sense_rc) { | |
580 | ret = -EINVAL; | |
581 | goto out; | |
582 | } | |
583 | ||
584 | if (alloc_mem) { | |
585 | rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, | |
586 | cmd->data_length, false); | |
587 | if (rc < 0) { | |
588 | ret = rc; | |
589 | goto out; | |
590 | } | |
591 | /* | |
592 | * Set this bit so that transport_free_pages() allows the | |
593 | * caller to release SGLs + physical memory allocated by | |
594 | * transport_generic_get_mem().. | |
595 | */ | |
596 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
597 | } else { | |
598 | /* | |
599 | * Here the previously allocated SGLs for the internal READ | |
600 | * are mapped zero-copy to the internal WRITE. | |
601 | */ | |
602 | sense_rc = transport_generic_map_mem_to_cmd(cmd, | |
603 | xop->xop_data_sg, xop->xop_data_nents, | |
604 | NULL, 0); | |
605 | if (sense_rc) { | |
606 | ret = -EINVAL; | |
607 | goto out; | |
608 | } | |
609 | ||
610 | pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" | |
611 | " %u\n", cmd->t_data_sg, cmd->t_data_nents); | |
612 | } | |
613 | ||
614 | return 0; | |
615 | ||
616 | out: | |
cbf031f4 NB |
617 | return ret; |
618 | } | |
619 | ||
620 | static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) | |
621 | { | |
622 | struct se_cmd *se_cmd = &xpt_cmd->se_cmd; | |
623 | sense_reason_t sense_rc; | |
624 | ||
625 | sense_rc = transport_generic_new_cmd(se_cmd); | |
626 | if (sense_rc) | |
627 | return -EINVAL; | |
628 | ||
629 | if (se_cmd->data_direction == DMA_TO_DEVICE) | |
630 | target_execute_cmd(se_cmd); | |
631 | ||
632 | wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); | |
633 | ||
634 | pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", | |
635 | se_cmd->scsi_status); | |
8a955d6d NB |
636 | |
637 | return (se_cmd->scsi_status) ? -EINVAL : 0; | |
cbf031f4 NB |
638 | } |
639 | ||
640 | static int target_xcopy_read_source( | |
641 | struct se_cmd *ec_cmd, | |
642 | struct xcopy_op *xop, | |
643 | struct se_device *src_dev, | |
644 | sector_t src_lba, | |
645 | u32 src_sectors) | |
646 | { | |
647 | struct xcopy_pt_cmd *xpt_cmd; | |
648 | struct se_cmd *se_cmd; | |
649 | u32 length = (src_sectors * src_dev->dev_attrib.block_size); | |
650 | int rc; | |
651 | unsigned char cdb[16]; | |
652 | bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); | |
653 | ||
654 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
655 | if (!xpt_cmd) { | |
656 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
657 | return -ENOMEM; | |
658 | } | |
659 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
660 | se_cmd = &xpt_cmd->se_cmd; | |
661 | ||
662 | memset(&cdb[0], 0, 16); | |
663 | cdb[0] = READ_16; | |
664 | put_unaligned_be64(src_lba, &cdb[2]); | |
665 | put_unaligned_be32(src_sectors, &cdb[10]); | |
666 | pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", | |
667 | (unsigned long long)src_lba, src_sectors, length); | |
668 | ||
669 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 670 | DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
671 | xop->src_pt_cmd = xpt_cmd; |
672 | ||
673 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], | |
674 | remote_port, true); | |
675 | if (rc < 0) { | |
676 | transport_generic_free_cmd(se_cmd, 0); | |
677 | return rc; | |
678 | } | |
679 | ||
680 | xop->xop_data_sg = se_cmd->t_data_sg; | |
681 | xop->xop_data_nents = se_cmd->t_data_nents; | |
682 | pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" | |
683 | " memory\n", xop->xop_data_sg, xop->xop_data_nents); | |
684 | ||
685 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
686 | if (rc < 0) { | |
687 | transport_generic_free_cmd(se_cmd, 0); | |
688 | return rc; | |
689 | } | |
690 | /* | |
691 | * Clear off the allocated t_data_sg, that has been saved for | |
692 | * zero-copy WRITE submission reuse in struct xcopy_op.. | |
693 | */ | |
694 | se_cmd->t_data_sg = NULL; | |
695 | se_cmd->t_data_nents = 0; | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static int target_xcopy_write_destination( | |
701 | struct se_cmd *ec_cmd, | |
702 | struct xcopy_op *xop, | |
703 | struct se_device *dst_dev, | |
704 | sector_t dst_lba, | |
705 | u32 dst_sectors) | |
706 | { | |
707 | struct xcopy_pt_cmd *xpt_cmd; | |
708 | struct se_cmd *se_cmd; | |
709 | u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); | |
710 | int rc; | |
711 | unsigned char cdb[16]; | |
712 | bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); | |
713 | ||
714 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
715 | if (!xpt_cmd) { | |
716 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
717 | return -ENOMEM; | |
718 | } | |
719 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
720 | se_cmd = &xpt_cmd->se_cmd; | |
721 | ||
722 | memset(&cdb[0], 0, 16); | |
723 | cdb[0] = WRITE_16; | |
724 | put_unaligned_be64(dst_lba, &cdb[2]); | |
725 | put_unaligned_be32(dst_sectors, &cdb[10]); | |
726 | pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", | |
727 | (unsigned long long)dst_lba, dst_sectors, length); | |
728 | ||
729 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 730 | DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
731 | xop->dst_pt_cmd = xpt_cmd; |
732 | ||
733 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], | |
734 | remote_port, false); | |
735 | if (rc < 0) { | |
736 | struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; | |
737 | /* | |
738 | * If the failure happened before the t_mem_list hand-off in | |
739 | * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that | |
740 | * core releases this memory on error during X-COPY WRITE I/O. | |
741 | */ | |
742 | src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
743 | src_cmd->t_data_sg = xop->xop_data_sg; | |
744 | src_cmd->t_data_nents = xop->xop_data_nents; | |
745 | ||
746 | transport_generic_free_cmd(se_cmd, 0); | |
747 | return rc; | |
748 | } | |
749 | ||
750 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
751 | if (rc < 0) { | |
752 | se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
753 | transport_generic_free_cmd(se_cmd, 0); | |
754 | return rc; | |
755 | } | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static void target_xcopy_do_work(struct work_struct *work) | |
761 | { | |
762 | struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); | |
763 | struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; | |
764 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
765 | sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; | |
766 | unsigned int max_sectors; | |
767 | int rc; | |
768 | unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; | |
769 | ||
770 | end_lba = src_lba + nolb; | |
771 | /* | |
772 | * Break up XCOPY I/O into hw_max_sectors sized I/O based on the | |
773 | * smallest max_sectors between src_dev + dev_dev, or | |
774 | */ | |
775 | max_sectors = min(src_dev->dev_attrib.hw_max_sectors, | |
776 | dst_dev->dev_attrib.hw_max_sectors); | |
777 | max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); | |
778 | ||
779 | max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); | |
780 | ||
781 | pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", | |
782 | nolb, max_nolb, (unsigned long long)end_lba); | |
783 | pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", | |
784 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
785 | ||
786 | while (src_lba < end_lba) { | |
787 | cur_nolb = min(nolb, max_nolb); | |
788 | ||
789 | pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," | |
790 | " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); | |
791 | ||
792 | rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); | |
793 | if (rc < 0) | |
794 | goto out; | |
795 | ||
796 | src_lba += cur_nolb; | |
797 | pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", | |
798 | (unsigned long long)src_lba); | |
799 | ||
800 | pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," | |
801 | " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); | |
802 | ||
803 | rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, | |
804 | dst_lba, cur_nolb); | |
805 | if (rc < 0) { | |
806 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
807 | goto out; | |
808 | } | |
809 | ||
810 | dst_lba += cur_nolb; | |
811 | pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", | |
812 | (unsigned long long)dst_lba); | |
813 | ||
814 | copied_nolb += cur_nolb; | |
815 | nolb -= cur_nolb; | |
816 | ||
817 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
818 | xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
819 | ||
820 | transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); | |
821 | } | |
822 | ||
823 | xcopy_pt_undepend_remotedev(xop); | |
824 | kfree(xop); | |
825 | ||
826 | pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", | |
827 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
828 | pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", | |
829 | copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); | |
830 | ||
831 | pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); | |
832 | target_complete_cmd(ec_cmd, SAM_STAT_GOOD); | |
833 | return; | |
834 | ||
835 | out: | |
836 | xcopy_pt_undepend_remotedev(xop); | |
837 | kfree(xop); | |
838 | ||
839 | pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); | |
840 | ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
841 | target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); | |
842 | } | |
843 | ||
844 | sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) | |
845 | { | |
acb3f260 | 846 | struct se_device *dev = se_cmd->se_dev; |
cbf031f4 NB |
847 | struct xcopy_op *xop = NULL; |
848 | unsigned char *p = NULL, *seg_desc; | |
849 | unsigned int list_id, list_id_usage, sdll, inline_dl, sa; | |
48502ddb | 850 | sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; |
cbf031f4 NB |
851 | int rc; |
852 | unsigned short tdll; | |
853 | ||
acb3f260 NB |
854 | if (!dev->dev_attrib.emulate_3pc) { |
855 | pr_err("EXTENDED_COPY operation explicitly disabled\n"); | |
856 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
857 | } | |
858 | ||
cbf031f4 NB |
859 | sa = se_cmd->t_task_cdb[1] & 0x1f; |
860 | if (sa != 0x00) { | |
861 | pr_err("EXTENDED_COPY(LID4) not supported\n"); | |
862 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
863 | } | |
864 | ||
934a138e NB |
865 | xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); |
866 | if (!xop) { | |
867 | pr_err("Unable to allocate xcopy_op\n"); | |
868 | return TCM_OUT_OF_RESOURCES; | |
869 | } | |
870 | xop->xop_se_cmd = se_cmd; | |
871 | ||
cbf031f4 NB |
872 | p = transport_kmap_data_sg(se_cmd); |
873 | if (!p) { | |
874 | pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); | |
934a138e | 875 | kfree(xop); |
cbf031f4 NB |
876 | return TCM_OUT_OF_RESOURCES; |
877 | } | |
878 | ||
879 | list_id = p[0]; | |
3f7a46c6 NB |
880 | list_id_usage = (p[1] & 0x18) >> 3; |
881 | ||
cbf031f4 NB |
882 | /* |
883 | * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH | |
884 | */ | |
885 | tdll = get_unaligned_be16(&p[2]); | |
886 | sdll = get_unaligned_be32(&p[8]); | |
887 | ||
888 | inline_dl = get_unaligned_be32(&p[12]); | |
889 | if (inline_dl != 0) { | |
890 | pr_err("XCOPY with non zero inline data length\n"); | |
891 | goto out; | |
892 | } | |
893 | ||
cbf031f4 NB |
894 | pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" |
895 | " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, | |
896 | tdll, sdll, inline_dl); | |
897 | ||
898 | rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); | |
899 | if (rc <= 0) | |
900 | goto out; | |
901 | ||
48502ddb NB |
902 | if (xop->src_dev->dev_attrib.block_size != |
903 | xop->dst_dev->dev_attrib.block_size) { | |
904 | pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" | |
905 | " block_size: %u currently unsupported\n", | |
906 | xop->src_dev->dev_attrib.block_size, | |
907 | xop->dst_dev->dev_attrib.block_size); | |
908 | xcopy_pt_undepend_remotedev(xop); | |
909 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
910 | goto out; | |
911 | } | |
912 | ||
cbf031f4 NB |
913 | pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, |
914 | rc * XCOPY_TARGET_DESC_LEN); | |
915 | seg_desc = &p[16]; | |
916 | seg_desc += (rc * XCOPY_TARGET_DESC_LEN); | |
917 | ||
918 | rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); | |
919 | if (rc <= 0) { | |
920 | xcopy_pt_undepend_remotedev(xop); | |
921 | goto out; | |
922 | } | |
923 | transport_kunmap_data_sg(se_cmd); | |
924 | ||
925 | pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, | |
926 | rc * XCOPY_SEGMENT_DESC_LEN); | |
927 | INIT_WORK(&xop->xop_work, target_xcopy_do_work); | |
928 | queue_work(xcopy_wq, &xop->xop_work); | |
929 | return TCM_NO_SENSE; | |
930 | ||
931 | out: | |
932 | if (p) | |
933 | transport_kunmap_data_sg(se_cmd); | |
934 | kfree(xop); | |
48502ddb | 935 | return ret; |
cbf031f4 NB |
936 | } |
937 | ||
938 | static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) | |
939 | { | |
940 | unsigned char *p; | |
941 | ||
942 | p = transport_kmap_data_sg(se_cmd); | |
943 | if (!p) { | |
944 | pr_err("transport_kmap_data_sg failed in" | |
945 | " target_rcr_operating_parameters\n"); | |
946 | return TCM_OUT_OF_RESOURCES; | |
947 | } | |
948 | ||
949 | if (se_cmd->data_length < 54) { | |
950 | pr_err("Receive Copy Results Op Parameters length" | |
951 | " too small: %u\n", se_cmd->data_length); | |
952 | transport_kunmap_data_sg(se_cmd); | |
953 | return TCM_INVALID_CDB_FIELD; | |
954 | } | |
955 | /* | |
956 | * Set SNLID=1 (Supports no List ID) | |
957 | */ | |
958 | p[4] = 0x1; | |
959 | /* | |
960 | * MAXIMUM TARGET DESCRIPTOR COUNT | |
961 | */ | |
962 | put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); | |
963 | /* | |
964 | * MAXIMUM SEGMENT DESCRIPTOR COUNT | |
965 | */ | |
966 | put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); | |
967 | /* | |
968 | * MAXIMUM DESCRIPTOR LIST LENGTH | |
969 | */ | |
970 | put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); | |
971 | /* | |
972 | * MAXIMUM SEGMENT LENGTH | |
973 | */ | |
974 | put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); | |
975 | /* | |
976 | * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) | |
977 | */ | |
978 | put_unaligned_be32(0x0, &p[20]); | |
979 | /* | |
980 | * HELD DATA LIMIT | |
981 | */ | |
982 | put_unaligned_be32(0x0, &p[24]); | |
983 | /* | |
984 | * MAXIMUM STREAM DEVICE TRANSFER SIZE | |
985 | */ | |
986 | put_unaligned_be32(0x0, &p[28]); | |
987 | /* | |
988 | * TOTAL CONCURRENT COPIES | |
989 | */ | |
990 | put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); | |
991 | /* | |
992 | * MAXIMUM CONCURRENT COPIES | |
993 | */ | |
994 | p[36] = RCR_OP_MAX_CONCURR_COPIES; | |
995 | /* | |
996 | * DATA SEGMENT GRANULARITY (log 2) | |
997 | */ | |
998 | p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; | |
999 | /* | |
1000 | * INLINE DATA GRANULARITY log 2) | |
1001 | */ | |
1002 | p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; | |
1003 | /* | |
1004 | * HELD DATA GRANULARITY | |
1005 | */ | |
1006 | p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; | |
1007 | /* | |
1008 | * IMPLEMENTED DESCRIPTOR LIST LENGTH | |
1009 | */ | |
1010 | p[43] = 0x2; | |
1011 | /* | |
1012 | * List of implemented descriptor type codes (ordered) | |
1013 | */ | |
1014 | p[44] = 0x02; /* Copy Block to Block device */ | |
1015 | p[45] = 0xe4; /* Identification descriptor target descriptor */ | |
1016 | ||
1017 | /* | |
1018 | * AVAILABLE DATA (n-3) | |
1019 | */ | |
1020 | put_unaligned_be32(42, &p[0]); | |
1021 | ||
1022 | transport_kunmap_data_sg(se_cmd); | |
1023 | target_complete_cmd(se_cmd, GOOD); | |
1024 | ||
1025 | return TCM_NO_SENSE; | |
1026 | } | |
1027 | ||
1028 | sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) | |
1029 | { | |
1030 | unsigned char *cdb = &se_cmd->t_task_cdb[0]; | |
1031 | int sa = (cdb[1] & 0x1f), list_id = cdb[2]; | |
1032 | sense_reason_t rc = TCM_NO_SENSE; | |
1033 | ||
1034 | pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" | |
1035 | " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); | |
1036 | ||
1037 | if (list_id != 0) { | |
1038 | pr_err("Receive Copy Results with non zero list identifier" | |
1039 | " not supported\n"); | |
1040 | return TCM_INVALID_CDB_FIELD; | |
1041 | } | |
1042 | ||
1043 | switch (sa) { | |
1044 | case RCR_SA_OPERATING_PARAMETERS: | |
1045 | rc = target_rcr_operating_parameters(se_cmd); | |
1046 | break; | |
1047 | case RCR_SA_COPY_STATUS: | |
1048 | case RCR_SA_RECEIVE_DATA: | |
1049 | case RCR_SA_FAILED_SEGMENT_DETAILS: | |
1050 | default: | |
1051 | pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); | |
1052 | return TCM_INVALID_CDB_FIELD; | |
1053 | } | |
1054 | ||
1055 | return rc; | |
1056 | } |