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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
cbf031f4 NB |
2 | /******************************************************************************* |
3 | * Filename: target_core_xcopy.c | |
4 | * | |
5 | * This file contains support for SPC-4 Extended-Copy offload with generic | |
6 | * TCM backends. | |
7 | * | |
8 | * Copyright (c) 2011-2013 Datera, Inc. All rights reserved. | |
9 | * | |
10 | * Author: | |
11 | * Nicholas A. Bellinger <nab@daterainc.com> | |
12 | * | |
cbf031f4 NB |
13 | ******************************************************************************/ |
14 | ||
cbf031f4 NB |
15 | #include <linux/slab.h> |
16 | #include <linux/spinlock.h> | |
17 | #include <linux/list.h> | |
18 | #include <linux/configfs.h> | |
8dcf07be | 19 | #include <linux/ratelimit.h> |
ba929992 | 20 | #include <scsi/scsi_proto.h> |
cbf031f4 NB |
21 | #include <asm/unaligned.h> |
22 | ||
23 | #include <target/target_core_base.h> | |
24 | #include <target/target_core_backend.h> | |
25 | #include <target/target_core_fabric.h> | |
cbf031f4 | 26 | |
b13876d2 | 27 | #include "target_core_internal.h" |
cbf031f4 NB |
28 | #include "target_core_pr.h" |
29 | #include "target_core_ua.h" | |
30 | #include "target_core_xcopy.h" | |
31 | ||
32 | static struct workqueue_struct *xcopy_wq = NULL; | |
cbf031f4 | 33 | |
d877d727 BVA |
34 | static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop); |
35 | ||
cbf031f4 NB |
36 | static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) |
37 | { | |
38 | int off = 0; | |
39 | ||
40 | buf[off++] = (0x6 << 4); | |
41 | buf[off++] = 0x01; | |
42 | buf[off++] = 0x40; | |
43 | buf[off] = (0x5 << 4); | |
44 | ||
45 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
46 | return 0; | |
47 | } | |
48 | ||
6906d008 MC |
49 | struct xcopy_dev_search_info { |
50 | const unsigned char *dev_wwn; | |
51 | struct se_device *found_dev; | |
52 | }; | |
53 | ||
54 | static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, | |
55 | void *data) | |
cbf031f4 | 56 | { |
6906d008 | 57 | struct xcopy_dev_search_info *info = data; |
94aae4ca | 58 | unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; |
cbf031f4 NB |
59 | int rc; |
60 | ||
6906d008 MC |
61 | if (!se_dev->dev_attrib.emulate_3pc) |
62 | return 0; | |
cbf031f4 | 63 | |
6906d008 MC |
64 | memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); |
65 | target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); | |
acb3f260 | 66 | |
6906d008 MC |
67 | rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); |
68 | if (rc != 0) | |
69 | return 0; | |
cbf031f4 | 70 | |
6906d008 MC |
71 | info->found_dev = se_dev; |
72 | pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); | |
cbf031f4 | 73 | |
6906d008 MC |
74 | rc = target_depend_item(&se_dev->dev_group.cg_item); |
75 | if (rc != 0) { | |
76 | pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n", | |
77 | rc, se_dev); | |
78 | return rc; | |
79 | } | |
cbf031f4 | 80 | |
6906d008 MC |
81 | pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n", |
82 | se_dev, &se_dev->dev_group); | |
83 | return 1; | |
84 | } | |
cbf031f4 | 85 | |
6906d008 MC |
86 | static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn, |
87 | struct se_device **found_dev) | |
88 | { | |
89 | struct xcopy_dev_search_info info; | |
90 | int ret; | |
cbf031f4 | 91 | |
6906d008 MC |
92 | memset(&info, 0, sizeof(info)); |
93 | info.dev_wwn = dev_wwn; | |
94 | ||
95 | ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info); | |
96 | if (ret == 1) { | |
97 | *found_dev = info.found_dev; | |
cbf031f4 | 98 | return 0; |
6906d008 MC |
99 | } else { |
100 | pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); | |
101 | return -EINVAL; | |
cbf031f4 | 102 | } |
cbf031f4 NB |
103 | } |
104 | ||
105 | static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
66640d35 | 106 | unsigned char *p, unsigned short cscd_index) |
cbf031f4 NB |
107 | { |
108 | unsigned char *desc = p; | |
109 | unsigned short ript; | |
110 | u8 desig_len; | |
111 | /* | |
112 | * Extract RELATIVE INITIATOR PORT IDENTIFIER | |
113 | */ | |
114 | ript = get_unaligned_be16(&desc[2]); | |
115 | pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); | |
116 | /* | |
117 | * Check for supported code set, association, and designator type | |
118 | */ | |
119 | if ((desc[4] & 0x0f) != 0x1) { | |
120 | pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); | |
121 | return -EINVAL; | |
122 | } | |
123 | if ((desc[5] & 0x30) != 0x00) { | |
124 | pr_err("XCOPY 0xe4: association other than LUN not supported\n"); | |
125 | return -EINVAL; | |
126 | } | |
127 | if ((desc[5] & 0x0f) != 0x3) { | |
128 | pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", | |
129 | (desc[5] & 0x0f)); | |
130 | return -EINVAL; | |
131 | } | |
132 | /* | |
133 | * Check for matching 16 byte length for NAA IEEE Registered Extended | |
134 | * Assigned designator | |
135 | */ | |
136 | desig_len = desc[7]; | |
95b1b51e | 137 | if (desig_len != XCOPY_NAA_IEEE_REGEX_LEN) { |
cbf031f4 NB |
138 | pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); |
139 | return -EINVAL; | |
140 | } | |
141 | pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); | |
142 | /* | |
143 | * Check for NAA IEEE Registered Extended Assigned header.. | |
144 | */ | |
145 | if ((desc[8] & 0xf0) != 0x60) { | |
146 | pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", | |
147 | (desc[8] & 0xf0)); | |
148 | return -EINVAL; | |
149 | } | |
150 | ||
66640d35 DD |
151 | if (cscd_index != xop->stdi && cscd_index != xop->dtdi) { |
152 | pr_debug("XCOPY 0xe4: ignoring CSCD entry %d - neither src nor " | |
153 | "dest\n", cscd_index); | |
154 | return 0; | |
155 | } | |
156 | ||
157 | if (cscd_index == xop->stdi) { | |
cbf031f4 NB |
158 | memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
159 | /* | |
160 | * Determine if the source designator matches the local device | |
161 | */ | |
162 | if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], | |
163 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
164 | xop->op_origin = XCOL_SOURCE_RECV_OP; | |
165 | xop->src_dev = se_cmd->se_dev; | |
166 | pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" | |
167 | " received xop\n", xop->src_dev); | |
168 | } | |
66640d35 DD |
169 | } |
170 | ||
171 | if (cscd_index == xop->dtdi) { | |
cbf031f4 NB |
172 | memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
173 | /* | |
66640d35 DD |
174 | * Determine if the destination designator matches the local |
175 | * device. If @cscd_index corresponds to both source (stdi) and | |
176 | * destination (dtdi), or dtdi comes after stdi, then | |
177 | * XCOL_DEST_RECV_OP wins. | |
cbf031f4 NB |
178 | */ |
179 | if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], | |
180 | XCOPY_NAA_IEEE_REGEX_LEN)) { | |
181 | xop->op_origin = XCOL_DEST_RECV_OP; | |
182 | xop->dst_dev = se_cmd->se_dev; | |
183 | pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" | |
184 | " received xop\n", xop->dst_dev); | |
185 | } | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, | |
192 | struct xcopy_op *xop, unsigned char *p, | |
449a1378 | 193 | unsigned short tdll, sense_reason_t *sense_ret) |
cbf031f4 NB |
194 | { |
195 | struct se_device *local_dev = se_cmd->se_dev; | |
196 | unsigned char *desc = p; | |
66640d35 DD |
197 | int offset = tdll % XCOPY_TARGET_DESC_LEN, rc; |
198 | unsigned short cscd_index = 0; | |
cbf031f4 | 199 | unsigned short start = 0; |
cbf031f4 | 200 | |
449a1378 NB |
201 | *sense_ret = TCM_INVALID_PARAMETER_LIST; |
202 | ||
cbf031f4 NB |
203 | if (offset != 0) { |
204 | pr_err("XCOPY target descriptor list length is not" | |
205 | " multiple of %d\n", XCOPY_TARGET_DESC_LEN); | |
c2438497 | 206 | *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; |
cbf031f4 NB |
207 | return -EINVAL; |
208 | } | |
61c35919 | 209 | if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) { |
cbf031f4 NB |
210 | pr_err("XCOPY target descriptor supports a maximum" |
211 | " two src/dest descriptors, tdll: %hu too large..\n", tdll); | |
61c35919 DD |
212 | /* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */ |
213 | *sense_ret = TCM_TOO_MANY_TARGET_DESCS; | |
cbf031f4 NB |
214 | return -EINVAL; |
215 | } | |
216 | /* | |
217 | * Generate an IEEE Registered Extended designator based upon the | |
218 | * se_device the XCOPY was received upon.. | |
219 | */ | |
220 | memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); | |
221 | target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); | |
222 | ||
223 | while (start < tdll) { | |
224 | /* | |
66640d35 DD |
225 | * Check target descriptor identification with 0xE4 type, and |
226 | * compare the current index with the CSCD descriptor IDs in | |
227 | * the segment descriptor. Use VPD 0x83 WWPN matching .. | |
cbf031f4 NB |
228 | */ |
229 | switch (desc[0]) { | |
230 | case 0xe4: | |
231 | rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, | |
66640d35 | 232 | &desc[0], cscd_index); |
cbf031f4 NB |
233 | if (rc != 0) |
234 | goto out; | |
cbf031f4 NB |
235 | start += XCOPY_TARGET_DESC_LEN; |
236 | desc += XCOPY_TARGET_DESC_LEN; | |
66640d35 | 237 | cscd_index++; |
cbf031f4 NB |
238 | break; |
239 | default: | |
240 | pr_err("XCOPY unsupported descriptor type code:" | |
241 | " 0x%02x\n", desc[0]); | |
c2438497 | 242 | *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; |
cbf031f4 NB |
243 | goto out; |
244 | } | |
245 | } | |
246 | ||
66640d35 DD |
247 | switch (xop->op_origin) { |
248 | case XCOL_SOURCE_RECV_OP: | |
94aae4ca DD |
249 | rc = target_xcopy_locate_se_dev_e4(xop->dst_tid_wwn, |
250 | &xop->dst_dev); | |
66640d35 DD |
251 | break; |
252 | case XCOL_DEST_RECV_OP: | |
94aae4ca DD |
253 | rc = target_xcopy_locate_se_dev_e4(xop->src_tid_wwn, |
254 | &xop->src_dev); | |
66640d35 DD |
255 | break; |
256 | default: | |
257 | pr_err("XCOPY CSCD descriptor IDs not found in CSCD list - " | |
258 | "stdi: %hu dtdi: %hu\n", xop->stdi, xop->dtdi); | |
259 | rc = -EINVAL; | |
260 | break; | |
261 | } | |
449a1378 NB |
262 | /* |
263 | * If a matching IEEE NAA 0x83 descriptor for the requested device | |
264 | * is not located on this node, return COPY_ABORTED with ASQ/ASQC | |
265 | * 0x0d/0x02 - COPY_TARGET_DEVICE_NOT_REACHABLE to request the | |
266 | * initiator to fall back to normal copy method. | |
267 | */ | |
268 | if (rc < 0) { | |
269 | *sense_ret = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; | |
cbf031f4 | 270 | goto out; |
449a1378 | 271 | } |
cbf031f4 NB |
272 | |
273 | pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", | |
274 | xop->src_dev, &xop->src_tid_wwn[0]); | |
275 | pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", | |
276 | xop->dst_dev, &xop->dst_tid_wwn[0]); | |
277 | ||
66640d35 | 278 | return cscd_index; |
cbf031f4 NB |
279 | |
280 | out: | |
281 | return -EINVAL; | |
282 | } | |
283 | ||
284 | static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, | |
285 | unsigned char *p) | |
286 | { | |
287 | unsigned char *desc = p; | |
288 | int dc = (desc[1] & 0x02); | |
289 | unsigned short desc_len; | |
290 | ||
291 | desc_len = get_unaligned_be16(&desc[2]); | |
292 | if (desc_len != 0x18) { | |
293 | pr_err("XCOPY segment desc 0x02: Illegal desc_len:" | |
294 | " %hu\n", desc_len); | |
295 | return -EINVAL; | |
296 | } | |
297 | ||
298 | xop->stdi = get_unaligned_be16(&desc[4]); | |
299 | xop->dtdi = get_unaligned_be16(&desc[6]); | |
f184210b DD |
300 | |
301 | if (xop->stdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX || | |
302 | xop->dtdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX) { | |
303 | pr_err("XCOPY segment desc 0x02: unsupported CSCD ID > 0x%x; stdi: %hu dtdi: %hu\n", | |
304 | XCOPY_CSCD_DESC_ID_LIST_OFF_MAX, xop->stdi, xop->dtdi); | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
cbf031f4 NB |
308 | pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", |
309 | desc_len, xop->stdi, xop->dtdi, dc); | |
310 | ||
311 | xop->nolb = get_unaligned_be16(&desc[10]); | |
312 | xop->src_lba = get_unaligned_be64(&desc[12]); | |
313 | xop->dst_lba = get_unaligned_be64(&desc[20]); | |
314 | pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", | |
315 | xop->nolb, (unsigned long long)xop->src_lba, | |
316 | (unsigned long long)xop->dst_lba); | |
317 | ||
cbf031f4 NB |
318 | return 0; |
319 | } | |
320 | ||
321 | static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, | |
322 | struct xcopy_op *xop, unsigned char *p, | |
af9f62c1 | 323 | unsigned int sdll, sense_reason_t *sense_ret) |
cbf031f4 NB |
324 | { |
325 | unsigned char *desc = p; | |
326 | unsigned int start = 0; | |
327 | int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; | |
328 | ||
af9f62c1 DD |
329 | *sense_ret = TCM_INVALID_PARAMETER_LIST; |
330 | ||
cbf031f4 NB |
331 | if (offset != 0) { |
332 | pr_err("XCOPY segment descriptor list length is not" | |
333 | " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); | |
c2438497 | 334 | *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; |
cbf031f4 NB |
335 | return -EINVAL; |
336 | } | |
af9f62c1 DD |
337 | if (sdll > RCR_OP_MAX_SG_DESC_COUNT * XCOPY_SEGMENT_DESC_LEN) { |
338 | pr_err("XCOPY supports %u segment descriptor(s), sdll: %u too" | |
339 | " large..\n", RCR_OP_MAX_SG_DESC_COUNT, sdll); | |
340 | /* spc4r37 6.4.3.5 SEGMENT DESCRIPTOR LIST LENGTH field */ | |
341 | *sense_ret = TCM_TOO_MANY_SEGMENT_DESCS; | |
342 | return -EINVAL; | |
343 | } | |
cbf031f4 NB |
344 | |
345 | while (start < sdll) { | |
346 | /* | |
347 | * Check segment descriptor type code for block -> block | |
348 | */ | |
349 | switch (desc[0]) { | |
350 | case 0x02: | |
351 | rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); | |
352 | if (rc < 0) | |
353 | goto out; | |
354 | ||
355 | ret++; | |
356 | start += XCOPY_SEGMENT_DESC_LEN; | |
357 | desc += XCOPY_SEGMENT_DESC_LEN; | |
358 | break; | |
359 | default: | |
6774def6 | 360 | pr_err("XCOPY unsupported segment descriptor" |
cbf031f4 | 361 | "type: 0x%02x\n", desc[0]); |
c2438497 | 362 | *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; |
cbf031f4 NB |
363 | goto out; |
364 | } | |
365 | } | |
366 | ||
367 | return ret; | |
368 | ||
369 | out: | |
370 | return -EINVAL; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Start xcopy_pt ops | |
375 | */ | |
376 | ||
377 | struct xcopy_pt_cmd { | |
cbf031f4 | 378 | struct se_cmd se_cmd; |
cbf031f4 | 379 | struct completion xpt_passthrough_sem; |
366bda19 | 380 | unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; |
cbf031f4 NB |
381 | }; |
382 | ||
adf653f9 | 383 | struct se_portal_group xcopy_pt_tpg; |
cbf031f4 NB |
384 | static struct se_session xcopy_pt_sess; |
385 | static struct se_node_acl xcopy_pt_nacl; | |
386 | ||
cbf031f4 NB |
387 | static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) |
388 | { | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) | |
393 | { | |
cbf031f4 NB |
394 | struct se_device *remote_dev; |
395 | ||
396 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) | |
397 | remote_dev = xop->dst_dev; | |
398 | else | |
399 | remote_dev = xop->src_dev; | |
400 | ||
d588cf8f | 401 | pr_debug("Calling configfs_undepend_item for" |
cbf031f4 | 402 | " remote_dev: %p remote_dev->dev_group: %p\n", |
d588cf8f | 403 | remote_dev, &remote_dev->dev_group.cg_item); |
cbf031f4 | 404 | |
d588cf8f | 405 | target_undepend_item(&remote_dev->dev_group.cg_item); |
cbf031f4 NB |
406 | } |
407 | ||
408 | static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) | |
409 | { | |
410 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
411 | struct xcopy_pt_cmd, se_cmd); | |
412 | ||
b92fcfcb DD |
413 | /* xpt_cmd is on the stack, nothing to free here */ |
414 | pr_debug("xpt_cmd done: %p\n", xpt_cmd); | |
cbf031f4 NB |
415 | } |
416 | ||
417 | static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) | |
418 | { | |
419 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, | |
420 | struct xcopy_pt_cmd, se_cmd); | |
421 | ||
422 | complete(&xpt_cmd->xpt_passthrough_sem); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int xcopy_pt_write_pending(struct se_cmd *se_cmd) | |
427 | { | |
428 | return 0; | |
429 | } | |
430 | ||
cbf031f4 NB |
431 | static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) |
432 | { | |
433 | return 0; | |
434 | } | |
435 | ||
436 | static int xcopy_pt_queue_status(struct se_cmd *se_cmd) | |
437 | { | |
438 | return 0; | |
439 | } | |
440 | ||
9ac8928e | 441 | static const struct target_core_fabric_ops xcopy_pt_tfo = { |
30c7ca93 | 442 | .fabric_name = "xcopy-pt", |
cbf031f4 NB |
443 | .get_cmd_state = xcopy_pt_get_cmd_state, |
444 | .release_cmd = xcopy_pt_release_cmd, | |
445 | .check_stop_free = xcopy_pt_check_stop_free, | |
446 | .write_pending = xcopy_pt_write_pending, | |
cbf031f4 NB |
447 | .queue_data_in = xcopy_pt_queue_data_in, |
448 | .queue_status = xcopy_pt_queue_status, | |
449 | }; | |
450 | ||
451 | /* | |
452 | * End xcopy_pt_ops | |
453 | */ | |
454 | ||
455 | int target_xcopy_setup_pt(void) | |
456 | { | |
ad669505 BVA |
457 | int ret; |
458 | ||
cbf031f4 NB |
459 | xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); |
460 | if (!xcopy_wq) { | |
461 | pr_err("Unable to allocate xcopy_wq\n"); | |
462 | return -ENOMEM; | |
463 | } | |
464 | ||
cbf031f4 | 465 | memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); |
cbf031f4 NB |
466 | INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); |
467 | INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); | |
468 | ||
cbf031f4 NB |
469 | xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; |
470 | ||
471 | memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); | |
472 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); | |
473 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); | |
474 | memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); | |
ad669505 BVA |
475 | ret = transport_init_session(&xcopy_pt_sess); |
476 | if (ret < 0) | |
477 | return ret; | |
cbf031f4 NB |
478 | |
479 | xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; | |
480 | xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; | |
481 | ||
482 | xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; | |
483 | xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | void target_xcopy_release_pt(void) | |
489 | { | |
490 | if (xcopy_wq) | |
491 | destroy_workqueue(xcopy_wq); | |
492 | } | |
493 | ||
be71530a BVA |
494 | /* |
495 | * target_xcopy_setup_pt_cmd - set up a pass-through command | |
496 | * @xpt_cmd: Data structure to initialize. | |
497 | * @xop: Describes the XCOPY operation received from an initiator. | |
498 | * @se_dev: Backend device to associate with @xpt_cmd if | |
499 | * @remote_port == true. | |
500 | * @cdb: SCSI CDB to be copied into @xpt_cmd. | |
501 | * @remote_port: If false, use the LUN through which the XCOPY command has | |
502 | * been received. If true, use @se_dev->xcopy_lun. | |
be71530a BVA |
503 | * |
504 | * Set up a SCSI command (READ or WRITE) that will be used to execute an | |
505 | * XCOPY command. | |
506 | */ | |
cbf031f4 NB |
507 | static int target_xcopy_setup_pt_cmd( |
508 | struct xcopy_pt_cmd *xpt_cmd, | |
509 | struct xcopy_op *xop, | |
510 | struct se_device *se_dev, | |
511 | unsigned char *cdb, | |
0ad08996 | 512 | bool remote_port) |
cbf031f4 NB |
513 | { |
514 | struct se_cmd *cmd = &xpt_cmd->se_cmd; | |
be71530a | 515 | |
cbf031f4 NB |
516 | /* |
517 | * Setup LUN+port to honor reservations based upon xop->op_origin for | |
518 | * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. | |
519 | */ | |
be71530a BVA |
520 | if (remote_port) { |
521 | cmd->se_lun = &se_dev->xcopy_lun; | |
522 | cmd->se_dev = se_dev; | |
523 | } else { | |
524 | cmd->se_lun = xop->xop_se_cmd->se_lun; | |
525 | cmd->se_dev = xop->xop_se_cmd->se_dev; | |
526 | } | |
527 | cmd->se_cmd_flags |= SCF_SE_LUN_CMD; | |
cbf031f4 | 528 | |
649ee054 | 529 | cmd->tag = 0; |
0ad08996 DD |
530 | if (target_setup_cmd_from_cdb(cmd, cdb)) |
531 | return -EINVAL; | |
cbf031f4 | 532 | |
0ad08996 DD |
533 | if (transport_generic_map_mem_to_cmd(cmd, xop->xop_data_sg, |
534 | xop->xop_data_nents, NULL, 0)) | |
535 | return -EINVAL; | |
cbf031f4 | 536 | |
0ad08996 DD |
537 | pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" |
538 | " %u\n", cmd->t_data_sg, cmd->t_data_nents); | |
cbf031f4 NB |
539 | |
540 | return 0; | |
cbf031f4 NB |
541 | } |
542 | ||
543 | static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) | |
544 | { | |
545 | struct se_cmd *se_cmd = &xpt_cmd->se_cmd; | |
546 | sense_reason_t sense_rc; | |
547 | ||
548 | sense_rc = transport_generic_new_cmd(se_cmd); | |
549 | if (sense_rc) | |
550 | return -EINVAL; | |
551 | ||
552 | if (se_cmd->data_direction == DMA_TO_DEVICE) | |
553 | target_execute_cmd(se_cmd); | |
554 | ||
555 | wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); | |
556 | ||
557 | pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", | |
558 | se_cmd->scsi_status); | |
8a955d6d NB |
559 | |
560 | return (se_cmd->scsi_status) ? -EINVAL : 0; | |
cbf031f4 NB |
561 | } |
562 | ||
563 | static int target_xcopy_read_source( | |
564 | struct se_cmd *ec_cmd, | |
565 | struct xcopy_op *xop, | |
566 | struct se_device *src_dev, | |
567 | sector_t src_lba, | |
568 | u32 src_sectors) | |
569 | { | |
b92fcfcb DD |
570 | struct xcopy_pt_cmd xpt_cmd; |
571 | struct se_cmd *se_cmd = &xpt_cmd.se_cmd; | |
cbf031f4 NB |
572 | u32 length = (src_sectors * src_dev->dev_attrib.block_size); |
573 | int rc; | |
574 | unsigned char cdb[16]; | |
575 | bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); | |
576 | ||
b92fcfcb DD |
577 | memset(&xpt_cmd, 0, sizeof(xpt_cmd)); |
578 | init_completion(&xpt_cmd.xpt_passthrough_sem); | |
cbf031f4 NB |
579 | |
580 | memset(&cdb[0], 0, 16); | |
581 | cdb[0] = READ_16; | |
582 | put_unaligned_be64(src_lba, &cdb[2]); | |
583 | put_unaligned_be32(src_sectors, &cdb[10]); | |
584 | pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", | |
585 | (unsigned long long)src_lba, src_sectors, length); | |
586 | ||
4416f89b | 587 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, |
b92fcfcb | 588 | DMA_FROM_DEVICE, 0, &xpt_cmd.sense_buffer[0]); |
cbf031f4 | 589 | |
b92fcfcb | 590 | rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, src_dev, &cdb[0], |
0ad08996 | 591 | remote_port); |
cbf031f4 | 592 | if (rc < 0) { |
b92fcfcb DD |
593 | ec_cmd->scsi_status = se_cmd->scsi_status; |
594 | goto out; | |
cbf031f4 NB |
595 | } |
596 | ||
cbf031f4 NB |
597 | pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" |
598 | " memory\n", xop->xop_data_sg, xop->xop_data_nents); | |
599 | ||
b92fcfcb DD |
600 | rc = target_xcopy_issue_pt_cmd(&xpt_cmd); |
601 | if (rc < 0) | |
602 | ec_cmd->scsi_status = se_cmd->scsi_status; | |
603 | out: | |
604 | transport_generic_free_cmd(se_cmd, 0); | |
605 | return rc; | |
cbf031f4 NB |
606 | } |
607 | ||
608 | static int target_xcopy_write_destination( | |
609 | struct se_cmd *ec_cmd, | |
610 | struct xcopy_op *xop, | |
611 | struct se_device *dst_dev, | |
612 | sector_t dst_lba, | |
613 | u32 dst_sectors) | |
614 | { | |
b92fcfcb DD |
615 | struct xcopy_pt_cmd xpt_cmd; |
616 | struct se_cmd *se_cmd = &xpt_cmd.se_cmd; | |
cbf031f4 NB |
617 | u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); |
618 | int rc; | |
619 | unsigned char cdb[16]; | |
620 | bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); | |
621 | ||
b92fcfcb DD |
622 | memset(&xpt_cmd, 0, sizeof(xpt_cmd)); |
623 | init_completion(&xpt_cmd.xpt_passthrough_sem); | |
cbf031f4 NB |
624 | |
625 | memset(&cdb[0], 0, 16); | |
626 | cdb[0] = WRITE_16; | |
627 | put_unaligned_be64(dst_lba, &cdb[2]); | |
628 | put_unaligned_be32(dst_sectors, &cdb[10]); | |
629 | pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", | |
630 | (unsigned long long)dst_lba, dst_sectors, length); | |
631 | ||
4416f89b | 632 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, |
b92fcfcb | 633 | DMA_TO_DEVICE, 0, &xpt_cmd.sense_buffer[0]); |
cbf031f4 | 634 | |
b92fcfcb | 635 | rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, dst_dev, &cdb[0], |
0ad08996 | 636 | remote_port); |
cbf031f4 | 637 | if (rc < 0) { |
b92fcfcb DD |
638 | ec_cmd->scsi_status = se_cmd->scsi_status; |
639 | goto out; | |
cbf031f4 NB |
640 | } |
641 | ||
b92fcfcb DD |
642 | rc = target_xcopy_issue_pt_cmd(&xpt_cmd); |
643 | if (rc < 0) | |
644 | ec_cmd->scsi_status = se_cmd->scsi_status; | |
645 | out: | |
646 | transport_generic_free_cmd(se_cmd, 0); | |
647 | return rc; | |
cbf031f4 NB |
648 | } |
649 | ||
650 | static void target_xcopy_do_work(struct work_struct *work) | |
651 | { | |
652 | struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); | |
cbf031f4 | 653 | struct se_cmd *ec_cmd = xop->xop_se_cmd; |
d877d727 BVA |
654 | struct se_device *src_dev, *dst_dev; |
655 | sector_t src_lba, dst_lba, end_lba; | |
cbf031f4 | 656 | unsigned int max_sectors; |
d877d727 | 657 | int rc = 0; |
0ad08996 | 658 | unsigned short nolb, max_nolb, copied_nolb = 0; |
d877d727 BVA |
659 | |
660 | if (target_parse_xcopy_cmd(xop) != TCM_NO_SENSE) | |
661 | goto err_free; | |
cbf031f4 | 662 | |
d877d727 BVA |
663 | if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev)) |
664 | goto err_free; | |
665 | ||
666 | src_dev = xop->src_dev; | |
667 | dst_dev = xop->dst_dev; | |
668 | src_lba = xop->src_lba; | |
669 | dst_lba = xop->dst_lba; | |
670 | nolb = xop->nolb; | |
cbf031f4 NB |
671 | end_lba = src_lba + nolb; |
672 | /* | |
673 | * Break up XCOPY I/O into hw_max_sectors sized I/O based on the | |
674 | * smallest max_sectors between src_dev + dev_dev, or | |
675 | */ | |
676 | max_sectors = min(src_dev->dev_attrib.hw_max_sectors, | |
677 | dst_dev->dev_attrib.hw_max_sectors); | |
678 | max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); | |
679 | ||
680 | max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); | |
681 | ||
682 | pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", | |
683 | nolb, max_nolb, (unsigned long long)end_lba); | |
684 | pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", | |
685 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
686 | ||
687 | while (src_lba < end_lba) { | |
0ad08996 DD |
688 | unsigned short cur_nolb = min(nolb, max_nolb); |
689 | u32 cur_bytes = cur_nolb * src_dev->dev_attrib.block_size; | |
690 | ||
691 | if (cur_bytes != xop->xop_data_bytes) { | |
692 | /* | |
693 | * (Re)allocate a buffer large enough to hold the XCOPY | |
694 | * I/O size, which can be reused each read / write loop. | |
695 | */ | |
696 | target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); | |
697 | rc = target_alloc_sgl(&xop->xop_data_sg, | |
698 | &xop->xop_data_nents, | |
699 | cur_bytes, | |
700 | false, false); | |
701 | if (rc < 0) | |
702 | goto out; | |
703 | xop->xop_data_bytes = cur_bytes; | |
704 | } | |
cbf031f4 NB |
705 | |
706 | pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," | |
707 | " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); | |
708 | ||
709 | rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); | |
710 | if (rc < 0) | |
711 | goto out; | |
712 | ||
713 | src_lba += cur_nolb; | |
714 | pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", | |
715 | (unsigned long long)src_lba); | |
716 | ||
717 | pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," | |
718 | " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); | |
719 | ||
720 | rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, | |
721 | dst_lba, cur_nolb); | |
b92fcfcb | 722 | if (rc < 0) |
cbf031f4 | 723 | goto out; |
cbf031f4 NB |
724 | |
725 | dst_lba += cur_nolb; | |
726 | pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", | |
727 | (unsigned long long)dst_lba); | |
728 | ||
729 | copied_nolb += cur_nolb; | |
730 | nolb -= cur_nolb; | |
cbf031f4 NB |
731 | } |
732 | ||
733 | xcopy_pt_undepend_remotedev(xop); | |
0ad08996 | 734 | target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); |
cbf031f4 NB |
735 | kfree(xop); |
736 | ||
737 | pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", | |
738 | (unsigned long long)src_lba, (unsigned long long)dst_lba); | |
739 | pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", | |
740 | copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); | |
741 | ||
742 | pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); | |
743 | target_complete_cmd(ec_cmd, SAM_STAT_GOOD); | |
744 | return; | |
745 | ||
746 | out: | |
747 | xcopy_pt_undepend_remotedev(xop); | |
0ad08996 | 748 | target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); |
d877d727 BVA |
749 | |
750 | err_free: | |
cbf031f4 | 751 | kfree(xop); |
926317de DI |
752 | /* |
753 | * Don't override an error scsi status if it has already been set | |
754 | */ | |
755 | if (ec_cmd->scsi_status == SAM_STAT_GOOD) { | |
756 | pr_warn_ratelimited("target_xcopy_do_work: rc: %d, Setting X-COPY" | |
757 | " CHECK_CONDITION -> sending response\n", rc); | |
758 | ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
759 | } | |
0583c261 | 760 | target_complete_cmd(ec_cmd, ec_cmd->scsi_status); |
cbf031f4 NB |
761 | } |
762 | ||
d877d727 BVA |
763 | /* |
764 | * Returns TCM_NO_SENSE upon success or a sense code != TCM_NO_SENSE if parsing | |
765 | * fails. | |
766 | */ | |
767 | static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop) | |
cbf031f4 | 768 | { |
d877d727 | 769 | struct se_cmd *se_cmd = xop->xop_se_cmd; |
cbf031f4 | 770 | unsigned char *p = NULL, *seg_desc; |
d877d727 | 771 | unsigned int list_id, list_id_usage, sdll, inline_dl; |
48502ddb | 772 | sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; |
cbf031f4 NB |
773 | int rc; |
774 | unsigned short tdll; | |
775 | ||
cbf031f4 NB |
776 | p = transport_kmap_data_sg(se_cmd); |
777 | if (!p) { | |
778 | pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); | |
779 | return TCM_OUT_OF_RESOURCES; | |
780 | } | |
781 | ||
782 | list_id = p[0]; | |
3f7a46c6 NB |
783 | list_id_usage = (p[1] & 0x18) >> 3; |
784 | ||
cbf031f4 NB |
785 | /* |
786 | * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH | |
787 | */ | |
788 | tdll = get_unaligned_be16(&p[2]); | |
789 | sdll = get_unaligned_be32(&p[8]); | |
7d387066 DD |
790 | if (tdll + sdll > RCR_OP_MAX_DESC_LIST_LEN) { |
791 | pr_err("XCOPY descriptor list length %u exceeds maximum %u\n", | |
792 | tdll + sdll, RCR_OP_MAX_DESC_LIST_LEN); | |
793 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; | |
794 | goto out; | |
795 | } | |
cbf031f4 NB |
796 | |
797 | inline_dl = get_unaligned_be32(&p[12]); | |
798 | if (inline_dl != 0) { | |
799 | pr_err("XCOPY with non zero inline data length\n"); | |
800 | goto out; | |
801 | } | |
802 | ||
f94fd098 DD |
803 | if (se_cmd->data_length < (XCOPY_HDR_LEN + tdll + sdll + inline_dl)) { |
804 | pr_err("XCOPY parameter truncation: data length %u too small " | |
805 | "for tdll: %hu sdll: %u inline_dl: %u\n", | |
806 | se_cmd->data_length, tdll, sdll, inline_dl); | |
807 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; | |
808 | goto out; | |
809 | } | |
810 | ||
cbf031f4 NB |
811 | pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" |
812 | " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, | |
813 | tdll, sdll, inline_dl); | |
814 | ||
66640d35 DD |
815 | /* |
816 | * skip over the target descriptors until segment descriptors | |
817 | * have been passed - CSCD ids are needed to determine src and dest. | |
818 | */ | |
819 | seg_desc = &p[16] + tdll; | |
820 | ||
821 | rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, | |
822 | sdll, &ret); | |
823 | if (rc <= 0) | |
824 | goto out; | |
825 | ||
826 | pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, | |
827 | rc * XCOPY_SEGMENT_DESC_LEN); | |
828 | ||
449a1378 | 829 | rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll, &ret); |
cbf031f4 NB |
830 | if (rc <= 0) |
831 | goto out; | |
832 | ||
48502ddb NB |
833 | if (xop->src_dev->dev_attrib.block_size != |
834 | xop->dst_dev->dev_attrib.block_size) { | |
835 | pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" | |
836 | " block_size: %u currently unsupported\n", | |
837 | xop->src_dev->dev_attrib.block_size, | |
838 | xop->dst_dev->dev_attrib.block_size); | |
839 | xcopy_pt_undepend_remotedev(xop); | |
840 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
841 | goto out; | |
842 | } | |
843 | ||
cbf031f4 NB |
844 | pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, |
845 | rc * XCOPY_TARGET_DESC_LEN); | |
cbf031f4 | 846 | transport_kunmap_data_sg(se_cmd); |
cbf031f4 NB |
847 | return TCM_NO_SENSE; |
848 | ||
849 | out: | |
850 | if (p) | |
851 | transport_kunmap_data_sg(se_cmd); | |
48502ddb | 852 | return ret; |
cbf031f4 NB |
853 | } |
854 | ||
d877d727 BVA |
855 | sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) |
856 | { | |
857 | struct se_device *dev = se_cmd->se_dev; | |
858 | struct xcopy_op *xop; | |
859 | unsigned int sa; | |
860 | ||
861 | if (!dev->dev_attrib.emulate_3pc) { | |
862 | pr_err("EXTENDED_COPY operation explicitly disabled\n"); | |
863 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
864 | } | |
865 | ||
866 | sa = se_cmd->t_task_cdb[1] & 0x1f; | |
867 | if (sa != 0x00) { | |
868 | pr_err("EXTENDED_COPY(LID4) not supported\n"); | |
869 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
870 | } | |
871 | ||
872 | if (se_cmd->data_length == 0) { | |
873 | target_complete_cmd(se_cmd, SAM_STAT_GOOD); | |
874 | return TCM_NO_SENSE; | |
875 | } | |
876 | if (se_cmd->data_length < XCOPY_HDR_LEN) { | |
877 | pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n", | |
878 | se_cmd->data_length, XCOPY_HDR_LEN); | |
879 | return TCM_PARAMETER_LIST_LENGTH_ERROR; | |
880 | } | |
881 | ||
882 | xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); | |
883 | if (!xop) | |
884 | goto err; | |
885 | xop->xop_se_cmd = se_cmd; | |
886 | INIT_WORK(&xop->xop_work, target_xcopy_do_work); | |
887 | if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work))) | |
888 | goto free; | |
889 | return TCM_NO_SENSE; | |
890 | ||
891 | free: | |
892 | kfree(xop); | |
893 | ||
894 | err: | |
895 | return TCM_OUT_OF_RESOURCES; | |
896 | } | |
897 | ||
cbf031f4 NB |
898 | static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) |
899 | { | |
900 | unsigned char *p; | |
901 | ||
902 | p = transport_kmap_data_sg(se_cmd); | |
903 | if (!p) { | |
904 | pr_err("transport_kmap_data_sg failed in" | |
905 | " target_rcr_operating_parameters\n"); | |
906 | return TCM_OUT_OF_RESOURCES; | |
907 | } | |
908 | ||
909 | if (se_cmd->data_length < 54) { | |
910 | pr_err("Receive Copy Results Op Parameters length" | |
911 | " too small: %u\n", se_cmd->data_length); | |
912 | transport_kunmap_data_sg(se_cmd); | |
913 | return TCM_INVALID_CDB_FIELD; | |
914 | } | |
915 | /* | |
916 | * Set SNLID=1 (Supports no List ID) | |
917 | */ | |
918 | p[4] = 0x1; | |
919 | /* | |
920 | * MAXIMUM TARGET DESCRIPTOR COUNT | |
921 | */ | |
922 | put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); | |
923 | /* | |
924 | * MAXIMUM SEGMENT DESCRIPTOR COUNT | |
925 | */ | |
926 | put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); | |
927 | /* | |
928 | * MAXIMUM DESCRIPTOR LIST LENGTH | |
929 | */ | |
930 | put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); | |
931 | /* | |
932 | * MAXIMUM SEGMENT LENGTH | |
933 | */ | |
934 | put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); | |
935 | /* | |
936 | * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) | |
937 | */ | |
938 | put_unaligned_be32(0x0, &p[20]); | |
939 | /* | |
940 | * HELD DATA LIMIT | |
941 | */ | |
942 | put_unaligned_be32(0x0, &p[24]); | |
943 | /* | |
944 | * MAXIMUM STREAM DEVICE TRANSFER SIZE | |
945 | */ | |
946 | put_unaligned_be32(0x0, &p[28]); | |
947 | /* | |
948 | * TOTAL CONCURRENT COPIES | |
949 | */ | |
950 | put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); | |
951 | /* | |
952 | * MAXIMUM CONCURRENT COPIES | |
953 | */ | |
954 | p[36] = RCR_OP_MAX_CONCURR_COPIES; | |
955 | /* | |
956 | * DATA SEGMENT GRANULARITY (log 2) | |
957 | */ | |
958 | p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; | |
959 | /* | |
960 | * INLINE DATA GRANULARITY log 2) | |
961 | */ | |
962 | p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; | |
963 | /* | |
964 | * HELD DATA GRANULARITY | |
965 | */ | |
966 | p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; | |
967 | /* | |
968 | * IMPLEMENTED DESCRIPTOR LIST LENGTH | |
969 | */ | |
970 | p[43] = 0x2; | |
971 | /* | |
972 | * List of implemented descriptor type codes (ordered) | |
973 | */ | |
974 | p[44] = 0x02; /* Copy Block to Block device */ | |
975 | p[45] = 0xe4; /* Identification descriptor target descriptor */ | |
976 | ||
977 | /* | |
978 | * AVAILABLE DATA (n-3) | |
979 | */ | |
980 | put_unaligned_be32(42, &p[0]); | |
981 | ||
982 | transport_kunmap_data_sg(se_cmd); | |
983 | target_complete_cmd(se_cmd, GOOD); | |
984 | ||
985 | return TCM_NO_SENSE; | |
986 | } | |
987 | ||
988 | sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) | |
989 | { | |
990 | unsigned char *cdb = &se_cmd->t_task_cdb[0]; | |
991 | int sa = (cdb[1] & 0x1f), list_id = cdb[2]; | |
992 | sense_reason_t rc = TCM_NO_SENSE; | |
993 | ||
994 | pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" | |
995 | " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); | |
996 | ||
997 | if (list_id != 0) { | |
998 | pr_err("Receive Copy Results with non zero list identifier" | |
999 | " not supported\n"); | |
1000 | return TCM_INVALID_CDB_FIELD; | |
1001 | } | |
1002 | ||
1003 | switch (sa) { | |
1004 | case RCR_SA_OPERATING_PARAMETERS: | |
1005 | rc = target_rcr_operating_parameters(se_cmd); | |
1006 | break; | |
1007 | case RCR_SA_COPY_STATUS: | |
1008 | case RCR_SA_RECEIVE_DATA: | |
1009 | case RCR_SA_FAILED_SEGMENT_DETAILS: | |
1010 | default: | |
1011 | pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); | |
1012 | return TCM_INVALID_CDB_FIELD; | |
1013 | } | |
1014 | ||
1015 | return rc; | |
1016 | } |