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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 | ||
cbf031f4 NB |
362 | static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) |
363 | { | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) | |
368 | { | |
cbf031f4 NB |
369 | struct se_device *remote_dev; |
370 | ||
371 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
372 | remote_dev = xop->dst_dev; | |
373 | else | |
374 | remote_dev = xop->src_dev; | |
375 | ||
d588cf8f | 376 | pr_debug("Calling configfs_undepend_item for" |
cbf031f4 | 377 | " remote_dev: %p remote_dev->dev_group: %p\n", |
d588cf8f | 378 | remote_dev, &remote_dev->dev_group.cg_item); |
cbf031f4 | 379 | |
d588cf8f | 380 | target_undepend_item(&remote_dev->dev_group.cg_item); |
cbf031f4 NB |
381 | } |
382 | ||
383 | static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) | |
384 | { | |
385 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
386 | struct xcopy_pt_cmd, se_cmd); | |
387 | ||
cbf031f4 NB |
388 | kfree(xpt_cmd); |
389 | } | |
390 | ||
391 | static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) | |
392 | { | |
393 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
394 | struct xcopy_pt_cmd, se_cmd); | |
395 | ||
396 | complete(&xpt_cmd->xpt_passthrough_sem); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static int xcopy_pt_write_pending(struct se_cmd *se_cmd) | |
401 | { | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) | |
406 | { | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int xcopy_pt_queue_status(struct se_cmd *se_cmd) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
9ac8928e | 420 | static const struct target_core_fabric_ops xcopy_pt_tfo = { |
cbf031f4 | 421 | .get_fabric_name = xcopy_pt_get_fabric_name, |
cbf031f4 NB |
422 | .get_cmd_state = xcopy_pt_get_cmd_state, |
423 | .release_cmd = xcopy_pt_release_cmd, | |
424 | .check_stop_free = xcopy_pt_check_stop_free, | |
425 | .write_pending = xcopy_pt_write_pending, | |
426 | .write_pending_status = xcopy_pt_write_pending_status, | |
427 | .queue_data_in = xcopy_pt_queue_data_in, | |
428 | .queue_status = xcopy_pt_queue_status, | |
429 | }; | |
430 | ||
431 | /* | |
432 | * End xcopy_pt_ops | |
433 | */ | |
434 | ||
435 | int target_xcopy_setup_pt(void) | |
436 | { | |
437 | xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); | |
438 | if (!xcopy_wq) { | |
439 | pr_err("Unable to allocate xcopy_wq\n"); | |
440 | return -ENOMEM; | |
441 | } | |
442 | ||
443 | memset(&xcopy_pt_port, 0, sizeof(struct se_port)); | |
444 | INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); | |
445 | INIT_LIST_HEAD(&xcopy_pt_port.sep_list); | |
446 | mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); | |
447 | ||
448 | memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); | |
449 | INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); | |
450 | INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); | |
451 | INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); | |
452 | ||
453 | xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; | |
454 | xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; | |
455 | ||
456 | memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); | |
457 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); | |
458 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); | |
459 | memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); | |
460 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); | |
461 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); | |
462 | ||
463 | xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; | |
464 | xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; | |
465 | ||
466 | xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; | |
467 | xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | void target_xcopy_release_pt(void) | |
473 | { | |
474 | if (xcopy_wq) | |
475 | destroy_workqueue(xcopy_wq); | |
476 | } | |
477 | ||
478 | static void target_xcopy_setup_pt_port( | |
479 | struct xcopy_pt_cmd *xpt_cmd, | |
480 | struct xcopy_op *xop, | |
481 | bool remote_port) | |
482 | { | |
483 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
484 | struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; | |
485 | ||
486 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) { | |
487 | /* | |
488 | * Honor destination port reservations for X-COPY PUSH emulation | |
489 | * when CDB is received on local source port, and READs blocks to | |
490 | * WRITE on remote destination port. | |
491 | */ | |
492 | if (remote_port) { | |
493 | xpt_cmd->remote_port = remote_port; | |
494 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
495 | pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" | |
496 | " cmd->se_lun->lun_sep for X-COPY data PUSH\n", | |
497 | pt_cmd->se_lun->lun_sep); | |
498 | } else { | |
499 | pt_cmd->se_lun = ec_cmd->se_lun; | |
500 | pt_cmd->se_dev = ec_cmd->se_dev; | |
501 | ||
502 | pr_debug("Honoring local SRC port from ec_cmd->se_dev:" | |
503 | " %p\n", pt_cmd->se_dev); | |
504 | pt_cmd->se_lun = ec_cmd->se_lun; | |
505 | pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", | |
506 | pt_cmd->se_lun); | |
507 | } | |
508 | } else { | |
509 | /* | |
510 | * Honor source port reservation for X-COPY PULL emulation | |
511 | * when CDB is received on local desintation port, and READs | |
512 | * blocks from the remote source port to WRITE on local | |
513 | * destination port. | |
514 | */ | |
515 | if (remote_port) { | |
516 | xpt_cmd->remote_port = remote_port; | |
517 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; | |
518 | pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" | |
519 | " cmd->se_lun->lun_sep for X-COPY data PULL\n", | |
520 | pt_cmd->se_lun->lun_sep); | |
521 | } else { | |
522 | pt_cmd->se_lun = ec_cmd->se_lun; | |
523 | pt_cmd->se_dev = ec_cmd->se_dev; | |
524 | ||
525 | pr_debug("Honoring local DST port from ec_cmd->se_dev:" | |
526 | " %p\n", pt_cmd->se_dev); | |
527 | pt_cmd->se_lun = ec_cmd->se_lun; | |
528 | pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", | |
529 | pt_cmd->se_lun); | |
530 | } | |
531 | } | |
532 | } | |
533 | ||
2c336e3a CH |
534 | static void target_xcopy_init_pt_lun(struct se_device *se_dev, |
535 | struct se_cmd *pt_cmd, bool remote_port) | |
cbf031f4 NB |
536 | { |
537 | /* | |
538 | * Don't allocate + init an pt_cmd->se_lun if honoring local port for | |
539 | * reservations. The pt_cmd->se_lun pointer will be setup from within | |
540 | * target_xcopy_setup_pt_port() | |
541 | */ | |
2c336e3a CH |
542 | if (remote_port) { |
543 | pr_debug("Setup emulated se_dev: %p from se_dev\n", | |
544 | pt_cmd->se_dev); | |
545 | pt_cmd->se_lun = &se_dev->xcopy_lun; | |
546 | pt_cmd->se_dev = se_dev; | |
cbf031f4 NB |
547 | } |
548 | ||
c3d0a7c2 | 549 | pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
cbf031f4 NB |
550 | } |
551 | ||
552 | static int target_xcopy_setup_pt_cmd( | |
553 | struct xcopy_pt_cmd *xpt_cmd, | |
554 | struct xcopy_op *xop, | |
555 | struct se_device *se_dev, | |
556 | unsigned char *cdb, | |
557 | bool remote_port, | |
558 | bool alloc_mem) | |
559 | { | |
560 | struct se_cmd *cmd = &xpt_cmd->se_cmd; | |
561 | sense_reason_t sense_rc; | |
562 | int ret = 0, rc; | |
563 | /* | |
564 | * Setup LUN+port to honor reservations based upon xop->op_origin for | |
565 | * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. | |
566 | */ | |
2c336e3a CH |
567 | target_xcopy_init_pt_lun(se_dev, cmd, remote_port); |
568 | ||
cbf031f4 NB |
569 | xpt_cmd->xcopy_op = xop; |
570 | target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); | |
571 | ||
649ee054 | 572 | cmd->tag = 0; |
cbf031f4 NB |
573 | sense_rc = target_setup_cmd_from_cdb(cmd, cdb); |
574 | if (sense_rc) { | |
575 | ret = -EINVAL; | |
576 | goto out; | |
577 | } | |
578 | ||
579 | if (alloc_mem) { | |
580 | rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, | |
581 | cmd->data_length, false); | |
582 | if (rc < 0) { | |
583 | ret = rc; | |
584 | goto out; | |
585 | } | |
586 | /* | |
587 | * Set this bit so that transport_free_pages() allows the | |
588 | * caller to release SGLs + physical memory allocated by | |
589 | * transport_generic_get_mem().. | |
590 | */ | |
591 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
592 | } else { | |
593 | /* | |
594 | * Here the previously allocated SGLs for the internal READ | |
595 | * are mapped zero-copy to the internal WRITE. | |
596 | */ | |
597 | sense_rc = transport_generic_map_mem_to_cmd(cmd, | |
598 | xop->xop_data_sg, xop->xop_data_nents, | |
599 | NULL, 0); | |
600 | if (sense_rc) { | |
601 | ret = -EINVAL; | |
602 | goto out; | |
603 | } | |
604 | ||
605 | pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" | |
606 | " %u\n", cmd->t_data_sg, cmd->t_data_nents); | |
607 | } | |
608 | ||
609 | return 0; | |
610 | ||
611 | out: | |
cbf031f4 NB |
612 | return ret; |
613 | } | |
614 | ||
615 | static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) | |
616 | { | |
617 | struct se_cmd *se_cmd = &xpt_cmd->se_cmd; | |
618 | sense_reason_t sense_rc; | |
619 | ||
620 | sense_rc = transport_generic_new_cmd(se_cmd); | |
621 | if (sense_rc) | |
622 | return -EINVAL; | |
623 | ||
624 | if (se_cmd->data_direction == DMA_TO_DEVICE) | |
625 | target_execute_cmd(se_cmd); | |
626 | ||
627 | wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); | |
628 | ||
629 | pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", | |
630 | se_cmd->scsi_status); | |
8a955d6d NB |
631 | |
632 | return (se_cmd->scsi_status) ? -EINVAL : 0; | |
cbf031f4 NB |
633 | } |
634 | ||
635 | static int target_xcopy_read_source( | |
636 | struct se_cmd *ec_cmd, | |
637 | struct xcopy_op *xop, | |
638 | struct se_device *src_dev, | |
639 | sector_t src_lba, | |
640 | u32 src_sectors) | |
641 | { | |
642 | struct xcopy_pt_cmd *xpt_cmd; | |
643 | struct se_cmd *se_cmd; | |
644 | u32 length = (src_sectors * src_dev->dev_attrib.block_size); | |
645 | int rc; | |
646 | unsigned char cdb[16]; | |
647 | bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); | |
648 | ||
649 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
650 | if (!xpt_cmd) { | |
651 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
652 | return -ENOMEM; | |
653 | } | |
654 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
655 | se_cmd = &xpt_cmd->se_cmd; | |
656 | ||
657 | memset(&cdb[0], 0, 16); | |
658 | cdb[0] = READ_16; | |
659 | put_unaligned_be64(src_lba, &cdb[2]); | |
660 | put_unaligned_be32(src_sectors, &cdb[10]); | |
661 | pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", | |
662 | (unsigned long long)src_lba, src_sectors, length); | |
663 | ||
664 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 665 | DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
666 | xop->src_pt_cmd = xpt_cmd; |
667 | ||
668 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], | |
669 | remote_port, true); | |
670 | if (rc < 0) { | |
671 | transport_generic_free_cmd(se_cmd, 0); | |
672 | return rc; | |
673 | } | |
674 | ||
675 | xop->xop_data_sg = se_cmd->t_data_sg; | |
676 | xop->xop_data_nents = se_cmd->t_data_nents; | |
677 | pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" | |
678 | " memory\n", xop->xop_data_sg, xop->xop_data_nents); | |
679 | ||
680 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
681 | if (rc < 0) { | |
682 | transport_generic_free_cmd(se_cmd, 0); | |
683 | return rc; | |
684 | } | |
685 | /* | |
686 | * Clear off the allocated t_data_sg, that has been saved for | |
687 | * zero-copy WRITE submission reuse in struct xcopy_op.. | |
688 | */ | |
689 | se_cmd->t_data_sg = NULL; | |
690 | se_cmd->t_data_nents = 0; | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static int target_xcopy_write_destination( | |
696 | struct se_cmd *ec_cmd, | |
697 | struct xcopy_op *xop, | |
698 | struct se_device *dst_dev, | |
699 | sector_t dst_lba, | |
700 | u32 dst_sectors) | |
701 | { | |
702 | struct xcopy_pt_cmd *xpt_cmd; | |
703 | struct se_cmd *se_cmd; | |
704 | u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); | |
705 | int rc; | |
706 | unsigned char cdb[16]; | |
707 | bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); | |
708 | ||
709 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); | |
710 | if (!xpt_cmd) { | |
711 | pr_err("Unable to allocate xcopy_pt_cmd\n"); | |
712 | return -ENOMEM; | |
713 | } | |
714 | init_completion(&xpt_cmd->xpt_passthrough_sem); | |
715 | se_cmd = &xpt_cmd->se_cmd; | |
716 | ||
717 | memset(&cdb[0], 0, 16); | |
718 | cdb[0] = WRITE_16; | |
719 | put_unaligned_be64(dst_lba, &cdb[2]); | |
720 | put_unaligned_be32(dst_sectors, &cdb[10]); | |
721 | pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", | |
722 | (unsigned long long)dst_lba, dst_sectors, length); | |
723 | ||
724 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, | |
366bda19 | 725 | DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
cbf031f4 NB |
726 | xop->dst_pt_cmd = xpt_cmd; |
727 | ||
728 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], | |
729 | remote_port, false); | |
730 | if (rc < 0) { | |
731 | struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; | |
732 | /* | |
733 | * If the failure happened before the t_mem_list hand-off in | |
734 | * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that | |
735 | * core releases this memory on error during X-COPY WRITE I/O. | |
736 | */ | |
737 | src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
738 | src_cmd->t_data_sg = xop->xop_data_sg; | |
739 | src_cmd->t_data_nents = xop->xop_data_nents; | |
740 | ||
741 | transport_generic_free_cmd(se_cmd, 0); | |
742 | return rc; | |
743 | } | |
744 | ||
745 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); | |
746 | if (rc < 0) { | |
747 | se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
748 | transport_generic_free_cmd(se_cmd, 0); | |
749 | return rc; | |
750 | } | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | static void target_xcopy_do_work(struct work_struct *work) | |
756 | { | |
757 | struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); | |
758 | struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; | |
759 | struct se_cmd *ec_cmd = xop->xop_se_cmd; | |
760 | sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; | |
761 | unsigned int max_sectors; | |
762 | int rc; | |
763 | unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; | |
764 | ||
765 | end_lba = src_lba + nolb; | |
766 | /* | |
767 | * Break up XCOPY I/O into hw_max_sectors sized I/O based on the | |
768 | * smallest max_sectors between src_dev + dev_dev, or | |
769 | */ | |
770 | max_sectors = min(src_dev->dev_attrib.hw_max_sectors, | |
771 | dst_dev->dev_attrib.hw_max_sectors); | |
772 | max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); | |
773 | ||
774 | max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); | |
775 | ||
776 | pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", | |
777 | nolb, max_nolb, (unsigned long long)end_lba); | |
778 | pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", | |
779 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
780 | ||
781 | while (src_lba < end_lba) { | |
782 | cur_nolb = min(nolb, max_nolb); | |
783 | ||
784 | pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," | |
785 | " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); | |
786 | ||
787 | rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); | |
788 | if (rc < 0) | |
789 | goto out; | |
790 | ||
791 | src_lba += cur_nolb; | |
792 | pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", | |
793 | (unsigned long long)src_lba); | |
794 | ||
795 | pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," | |
796 | " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); | |
797 | ||
798 | rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, | |
799 | dst_lba, cur_nolb); | |
800 | if (rc < 0) { | |
801 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
802 | goto out; | |
803 | } | |
804 | ||
805 | dst_lba += cur_nolb; | |
806 | pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", | |
807 | (unsigned long long)dst_lba); | |
808 | ||
809 | copied_nolb += cur_nolb; | |
810 | nolb -= cur_nolb; | |
811 | ||
812 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); | |
813 | xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
814 | ||
815 | transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); | |
816 | } | |
817 | ||
818 | xcopy_pt_undepend_remotedev(xop); | |
819 | kfree(xop); | |
820 | ||
821 | pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", | |
822 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
823 | pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", | |
824 | copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); | |
825 | ||
826 | pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); | |
827 | target_complete_cmd(ec_cmd, SAM_STAT_GOOD); | |
828 | return; | |
829 | ||
830 | out: | |
831 | xcopy_pt_undepend_remotedev(xop); | |
832 | kfree(xop); | |
833 | ||
834 | pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); | |
835 | ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
836 | target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); | |
837 | } | |
838 | ||
839 | sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) | |
840 | { | |
acb3f260 | 841 | struct se_device *dev = se_cmd->se_dev; |
cbf031f4 NB |
842 | struct xcopy_op *xop = NULL; |
843 | unsigned char *p = NULL, *seg_desc; | |
844 | unsigned int list_id, list_id_usage, sdll, inline_dl, sa; | |
48502ddb | 845 | sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; |
cbf031f4 NB |
846 | int rc; |
847 | unsigned short tdll; | |
848 | ||
acb3f260 NB |
849 | if (!dev->dev_attrib.emulate_3pc) { |
850 | pr_err("EXTENDED_COPY operation explicitly disabled\n"); | |
851 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
852 | } | |
853 | ||
cbf031f4 NB |
854 | sa = se_cmd->t_task_cdb[1] & 0x1f; |
855 | if (sa != 0x00) { | |
856 | pr_err("EXTENDED_COPY(LID4) not supported\n"); | |
857 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
858 | } | |
859 | ||
934a138e NB |
860 | xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); |
861 | if (!xop) { | |
862 | pr_err("Unable to allocate xcopy_op\n"); | |
863 | return TCM_OUT_OF_RESOURCES; | |
864 | } | |
865 | xop->xop_se_cmd = se_cmd; | |
866 | ||
cbf031f4 NB |
867 | p = transport_kmap_data_sg(se_cmd); |
868 | if (!p) { | |
869 | pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); | |
934a138e | 870 | kfree(xop); |
cbf031f4 NB |
871 | return TCM_OUT_OF_RESOURCES; |
872 | } | |
873 | ||
874 | list_id = p[0]; | |
3f7a46c6 NB |
875 | list_id_usage = (p[1] & 0x18) >> 3; |
876 | ||
cbf031f4 NB |
877 | /* |
878 | * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH | |
879 | */ | |
880 | tdll = get_unaligned_be16(&p[2]); | |
881 | sdll = get_unaligned_be32(&p[8]); | |
882 | ||
883 | inline_dl = get_unaligned_be32(&p[12]); | |
884 | if (inline_dl != 0) { | |
885 | pr_err("XCOPY with non zero inline data length\n"); | |
886 | goto out; | |
887 | } | |
888 | ||
cbf031f4 NB |
889 | pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" |
890 | " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, | |
891 | tdll, sdll, inline_dl); | |
892 | ||
893 | rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); | |
894 | if (rc <= 0) | |
895 | goto out; | |
896 | ||
48502ddb NB |
897 | if (xop->src_dev->dev_attrib.block_size != |
898 | xop->dst_dev->dev_attrib.block_size) { | |
899 | pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" | |
900 | " block_size: %u currently unsupported\n", | |
901 | xop->src_dev->dev_attrib.block_size, | |
902 | xop->dst_dev->dev_attrib.block_size); | |
903 | xcopy_pt_undepend_remotedev(xop); | |
904 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
905 | goto out; | |
906 | } | |
907 | ||
cbf031f4 NB |
908 | pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, |
909 | rc * XCOPY_TARGET_DESC_LEN); | |
910 | seg_desc = &p[16]; | |
911 | seg_desc += (rc * XCOPY_TARGET_DESC_LEN); | |
912 | ||
913 | rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); | |
914 | if (rc <= 0) { | |
915 | xcopy_pt_undepend_remotedev(xop); | |
916 | goto out; | |
917 | } | |
918 | transport_kunmap_data_sg(se_cmd); | |
919 | ||
920 | pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, | |
921 | rc * XCOPY_SEGMENT_DESC_LEN); | |
922 | INIT_WORK(&xop->xop_work, target_xcopy_do_work); | |
923 | queue_work(xcopy_wq, &xop->xop_work); | |
924 | return TCM_NO_SENSE; | |
925 | ||
926 | out: | |
927 | if (p) | |
928 | transport_kunmap_data_sg(se_cmd); | |
929 | kfree(xop); | |
48502ddb | 930 | return ret; |
cbf031f4 NB |
931 | } |
932 | ||
933 | static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) | |
934 | { | |
935 | unsigned char *p; | |
936 | ||
937 | p = transport_kmap_data_sg(se_cmd); | |
938 | if (!p) { | |
939 | pr_err("transport_kmap_data_sg failed in" | |
940 | " target_rcr_operating_parameters\n"); | |
941 | return TCM_OUT_OF_RESOURCES; | |
942 | } | |
943 | ||
944 | if (se_cmd->data_length < 54) { | |
945 | pr_err("Receive Copy Results Op Parameters length" | |
946 | " too small: %u\n", se_cmd->data_length); | |
947 | transport_kunmap_data_sg(se_cmd); | |
948 | return TCM_INVALID_CDB_FIELD; | |
949 | } | |
950 | /* | |
951 | * Set SNLID=1 (Supports no List ID) | |
952 | */ | |
953 | p[4] = 0x1; | |
954 | /* | |
955 | * MAXIMUM TARGET DESCRIPTOR COUNT | |
956 | */ | |
957 | put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); | |
958 | /* | |
959 | * MAXIMUM SEGMENT DESCRIPTOR COUNT | |
960 | */ | |
961 | put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); | |
962 | /* | |
963 | * MAXIMUM DESCRIPTOR LIST LENGTH | |
964 | */ | |
965 | put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); | |
966 | /* | |
967 | * MAXIMUM SEGMENT LENGTH | |
968 | */ | |
969 | put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); | |
970 | /* | |
971 | * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) | |
972 | */ | |
973 | put_unaligned_be32(0x0, &p[20]); | |
974 | /* | |
975 | * HELD DATA LIMIT | |
976 | */ | |
977 | put_unaligned_be32(0x0, &p[24]); | |
978 | /* | |
979 | * MAXIMUM STREAM DEVICE TRANSFER SIZE | |
980 | */ | |
981 | put_unaligned_be32(0x0, &p[28]); | |
982 | /* | |
983 | * TOTAL CONCURRENT COPIES | |
984 | */ | |
985 | put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); | |
986 | /* | |
987 | * MAXIMUM CONCURRENT COPIES | |
988 | */ | |
989 | p[36] = RCR_OP_MAX_CONCURR_COPIES; | |
990 | /* | |
991 | * DATA SEGMENT GRANULARITY (log 2) | |
992 | */ | |
993 | p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; | |
994 | /* | |
995 | * INLINE DATA GRANULARITY log 2) | |
996 | */ | |
997 | p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; | |
998 | /* | |
999 | * HELD DATA GRANULARITY | |
1000 | */ | |
1001 | p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; | |
1002 | /* | |
1003 | * IMPLEMENTED DESCRIPTOR LIST LENGTH | |
1004 | */ | |
1005 | p[43] = 0x2; | |
1006 | /* | |
1007 | * List of implemented descriptor type codes (ordered) | |
1008 | */ | |
1009 | p[44] = 0x02; /* Copy Block to Block device */ | |
1010 | p[45] = 0xe4; /* Identification descriptor target descriptor */ | |
1011 | ||
1012 | /* | |
1013 | * AVAILABLE DATA (n-3) | |
1014 | */ | |
1015 | put_unaligned_be32(42, &p[0]); | |
1016 | ||
1017 | transport_kunmap_data_sg(se_cmd); | |
1018 | target_complete_cmd(se_cmd, GOOD); | |
1019 | ||
1020 | return TCM_NO_SENSE; | |
1021 | } | |
1022 | ||
1023 | sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) | |
1024 | { | |
1025 | unsigned char *cdb = &se_cmd->t_task_cdb[0]; | |
1026 | int sa = (cdb[1] & 0x1f), list_id = cdb[2]; | |
1027 | sense_reason_t rc = TCM_NO_SENSE; | |
1028 | ||
1029 | pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" | |
1030 | " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); | |
1031 | ||
1032 | if (list_id != 0) { | |
1033 | pr_err("Receive Copy Results with non zero list identifier" | |
1034 | " not supported\n"); | |
1035 | return TCM_INVALID_CDB_FIELD; | |
1036 | } | |
1037 | ||
1038 | switch (sa) { | |
1039 | case RCR_SA_OPERATING_PARAMETERS: | |
1040 | rc = target_rcr_operating_parameters(se_cmd); | |
1041 | break; | |
1042 | case RCR_SA_COPY_STATUS: | |
1043 | case RCR_SA_RECEIVE_DATA: | |
1044 | case RCR_SA_FAILED_SEGMENT_DETAILS: | |
1045 | default: | |
1046 | pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); | |
1047 | return TCM_INVALID_CDB_FIELD; | |
1048 | } | |
1049 | ||
1050 | return rc; | |
1051 | } |