Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 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 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 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 | |
| 37 | #include "target_core_pr.h" |
| 38 | #include "target_core_ua.h" |
| 39 | #include "target_core_xcopy.h" |
| 40 | |
| 41 | static struct workqueue_struct *xcopy_wq = NULL; |
| 42 | /* |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 43 | * From target_core_device.c |
| 44 | */ |
| 45 | extern struct mutex g_device_mutex; |
| 46 | extern struct list_head g_device_list; |
| 47 | /* |
| 48 | * From target_core_configfs.c |
| 49 | */ |
| 50 | extern struct configfs_subsystem *target_core_subsystem[]; |
| 51 | |
| 52 | static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) |
| 53 | { |
| 54 | int off = 0; |
| 55 | |
| 56 | buf[off++] = (0x6 << 4); |
| 57 | buf[off++] = 0x01; |
| 58 | buf[off++] = 0x40; |
| 59 | buf[off] = (0x5 << 4); |
| 60 | |
| 61 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, |
| 66 | bool src) |
| 67 | { |
| 68 | struct se_device *se_dev; |
| 69 | struct configfs_subsystem *subsys = target_core_subsystem[0]; |
| 70 | unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; |
| 71 | int rc; |
| 72 | |
| 73 | if (src == true) |
| 74 | dev_wwn = &xop->dst_tid_wwn[0]; |
| 75 | else |
| 76 | dev_wwn = &xop->src_tid_wwn[0]; |
| 77 | |
| 78 | mutex_lock(&g_device_mutex); |
| 79 | list_for_each_entry(se_dev, &g_device_list, g_dev_node) { |
| 80 | |
Nicholas Bellinger | acb3f26 | 2013-10-07 18:05:14 -0700 | [diff] [blame] | 81 | if (!se_dev->dev_attrib.emulate_3pc) |
| 82 | continue; |
| 83 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 84 | memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); |
| 85 | target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); |
| 86 | |
| 87 | rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); |
| 88 | if (rc != 0) |
| 89 | continue; |
| 90 | |
| 91 | if (src == true) { |
| 92 | xop->dst_dev = se_dev; |
| 93 | pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" |
| 94 | " se_dev\n", xop->dst_dev); |
| 95 | } else { |
| 96 | xop->src_dev = se_dev; |
| 97 | pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" |
| 98 | " se_dev\n", xop->src_dev); |
| 99 | } |
| 100 | |
| 101 | rc = configfs_depend_item(subsys, |
| 102 | &se_dev->dev_group.cg_item); |
| 103 | if (rc != 0) { |
| 104 | pr_err("configfs_depend_item attempt failed:" |
| 105 | " %d for se_dev: %p\n", rc, se_dev); |
| 106 | mutex_unlock(&g_device_mutex); |
| 107 | return rc; |
| 108 | } |
| 109 | |
| 110 | pr_debug("Called configfs_depend_item for subsys: %p se_dev: %p" |
| 111 | " se_dev->se_dev_group: %p\n", subsys, se_dev, |
| 112 | &se_dev->dev_group); |
| 113 | |
| 114 | mutex_unlock(&g_device_mutex); |
| 115 | return 0; |
| 116 | } |
| 117 | mutex_unlock(&g_device_mutex); |
| 118 | |
| 119 | pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); |
| 120 | return -EINVAL; |
| 121 | } |
| 122 | |
| 123 | static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, |
| 124 | unsigned char *p, bool src) |
| 125 | { |
| 126 | unsigned char *desc = p; |
| 127 | unsigned short ript; |
| 128 | u8 desig_len; |
| 129 | /* |
| 130 | * Extract RELATIVE INITIATOR PORT IDENTIFIER |
| 131 | */ |
| 132 | ript = get_unaligned_be16(&desc[2]); |
| 133 | pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); |
| 134 | /* |
| 135 | * Check for supported code set, association, and designator type |
| 136 | */ |
| 137 | if ((desc[4] & 0x0f) != 0x1) { |
| 138 | pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); |
| 139 | return -EINVAL; |
| 140 | } |
| 141 | if ((desc[5] & 0x30) != 0x00) { |
| 142 | pr_err("XCOPY 0xe4: association other than LUN not supported\n"); |
| 143 | return -EINVAL; |
| 144 | } |
| 145 | if ((desc[5] & 0x0f) != 0x3) { |
| 146 | pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", |
| 147 | (desc[5] & 0x0f)); |
| 148 | return -EINVAL; |
| 149 | } |
| 150 | /* |
| 151 | * Check for matching 16 byte length for NAA IEEE Registered Extended |
| 152 | * Assigned designator |
| 153 | */ |
| 154 | desig_len = desc[7]; |
| 155 | if (desig_len != 16) { |
| 156 | pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); |
| 157 | return -EINVAL; |
| 158 | } |
| 159 | pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); |
| 160 | /* |
| 161 | * Check for NAA IEEE Registered Extended Assigned header.. |
| 162 | */ |
| 163 | if ((desc[8] & 0xf0) != 0x60) { |
| 164 | pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", |
| 165 | (desc[8] & 0xf0)); |
| 166 | return -EINVAL; |
| 167 | } |
| 168 | |
| 169 | if (src == true) { |
| 170 | memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
| 171 | /* |
| 172 | * Determine if the source designator matches the local device |
| 173 | */ |
| 174 | if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], |
| 175 | XCOPY_NAA_IEEE_REGEX_LEN)) { |
| 176 | xop->op_origin = XCOL_SOURCE_RECV_OP; |
| 177 | xop->src_dev = se_cmd->se_dev; |
| 178 | pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" |
| 179 | " received xop\n", xop->src_dev); |
| 180 | } |
| 181 | } else { |
| 182 | memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); |
| 183 | /* |
| 184 | * Determine if the destination designator matches the local device |
| 185 | */ |
| 186 | if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], |
| 187 | XCOPY_NAA_IEEE_REGEX_LEN)) { |
| 188 | xop->op_origin = XCOL_DEST_RECV_OP; |
| 189 | xop->dst_dev = se_cmd->se_dev; |
| 190 | pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" |
| 191 | " received xop\n", xop->dst_dev); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, |
| 199 | struct xcopy_op *xop, unsigned char *p, |
| 200 | unsigned short tdll) |
| 201 | { |
| 202 | struct se_device *local_dev = se_cmd->se_dev; |
| 203 | unsigned char *desc = p; |
| 204 | int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; |
| 205 | unsigned short start = 0; |
| 206 | bool src = true; |
| 207 | |
| 208 | if (offset != 0) { |
| 209 | pr_err("XCOPY target descriptor list length is not" |
| 210 | " multiple of %d\n", XCOPY_TARGET_DESC_LEN); |
| 211 | return -EINVAL; |
| 212 | } |
| 213 | if (tdll > 64) { |
| 214 | pr_err("XCOPY target descriptor supports a maximum" |
| 215 | " two src/dest descriptors, tdll: %hu too large..\n", tdll); |
| 216 | return -EINVAL; |
| 217 | } |
| 218 | /* |
| 219 | * Generate an IEEE Registered Extended designator based upon the |
| 220 | * se_device the XCOPY was received upon.. |
| 221 | */ |
| 222 | memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); |
| 223 | target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); |
| 224 | |
| 225 | while (start < tdll) { |
| 226 | /* |
| 227 | * Check target descriptor identification with 0xE4 type with |
| 228 | * use VPD 0x83 WWPN matching .. |
| 229 | */ |
| 230 | switch (desc[0]) { |
| 231 | case 0xe4: |
| 232 | rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, |
| 233 | &desc[0], src); |
| 234 | if (rc != 0) |
| 235 | goto out; |
| 236 | /* |
| 237 | * Assume target descriptors are in source -> destination order.. |
| 238 | */ |
| 239 | if (src == true) |
| 240 | src = false; |
| 241 | else |
| 242 | src = true; |
| 243 | start += XCOPY_TARGET_DESC_LEN; |
| 244 | desc += XCOPY_TARGET_DESC_LEN; |
| 245 | ret++; |
| 246 | break; |
| 247 | default: |
| 248 | pr_err("XCOPY unsupported descriptor type code:" |
| 249 | " 0x%02x\n", desc[0]); |
| 250 | goto out; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) |
| 255 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); |
| 256 | else |
| 257 | rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); |
| 258 | |
| 259 | if (rc < 0) |
| 260 | goto out; |
| 261 | |
| 262 | pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", |
| 263 | xop->src_dev, &xop->src_tid_wwn[0]); |
| 264 | pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", |
| 265 | xop->dst_dev, &xop->dst_tid_wwn[0]); |
| 266 | |
| 267 | return ret; |
| 268 | |
| 269 | out: |
| 270 | return -EINVAL; |
| 271 | } |
| 272 | |
| 273 | static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, |
| 274 | unsigned char *p) |
| 275 | { |
| 276 | unsigned char *desc = p; |
| 277 | int dc = (desc[1] & 0x02); |
| 278 | unsigned short desc_len; |
| 279 | |
| 280 | desc_len = get_unaligned_be16(&desc[2]); |
| 281 | if (desc_len != 0x18) { |
| 282 | pr_err("XCOPY segment desc 0x02: Illegal desc_len:" |
| 283 | " %hu\n", desc_len); |
| 284 | return -EINVAL; |
| 285 | } |
| 286 | |
| 287 | xop->stdi = get_unaligned_be16(&desc[4]); |
| 288 | xop->dtdi = get_unaligned_be16(&desc[6]); |
| 289 | pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", |
| 290 | desc_len, xop->stdi, xop->dtdi, dc); |
| 291 | |
| 292 | xop->nolb = get_unaligned_be16(&desc[10]); |
| 293 | xop->src_lba = get_unaligned_be64(&desc[12]); |
| 294 | xop->dst_lba = get_unaligned_be64(&desc[20]); |
| 295 | pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", |
| 296 | xop->nolb, (unsigned long long)xop->src_lba, |
| 297 | (unsigned long long)xop->dst_lba); |
| 298 | |
| 299 | if (dc != 0) { |
Nicholas Bellinger | 3e9e01d | 2013-09-18 12:33:42 -0700 | [diff] [blame] | 300 | xop->dbl = (desc[29] & 0xff) << 16; |
| 301 | xop->dbl |= (desc[30] & 0xff) << 8; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 302 | xop->dbl |= desc[31] & 0xff; |
| 303 | |
| 304 | pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); |
| 305 | } |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, |
| 310 | struct xcopy_op *xop, unsigned char *p, |
| 311 | unsigned int sdll) |
| 312 | { |
| 313 | unsigned char *desc = p; |
| 314 | unsigned int start = 0; |
| 315 | int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; |
| 316 | |
| 317 | if (offset != 0) { |
| 318 | pr_err("XCOPY segment descriptor list length is not" |
| 319 | " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); |
| 320 | return -EINVAL; |
| 321 | } |
| 322 | |
| 323 | while (start < sdll) { |
| 324 | /* |
| 325 | * Check segment descriptor type code for block -> block |
| 326 | */ |
| 327 | switch (desc[0]) { |
| 328 | case 0x02: |
| 329 | rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); |
| 330 | if (rc < 0) |
| 331 | goto out; |
| 332 | |
| 333 | ret++; |
| 334 | start += XCOPY_SEGMENT_DESC_LEN; |
| 335 | desc += XCOPY_SEGMENT_DESC_LEN; |
| 336 | break; |
| 337 | default: |
| 338 | pr_err("XCOPY unspported segment descriptor" |
| 339 | "type: 0x%02x\n", desc[0]); |
| 340 | goto out; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | return ret; |
| 345 | |
| 346 | out: |
| 347 | return -EINVAL; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * Start xcopy_pt ops |
| 352 | */ |
| 353 | |
| 354 | struct xcopy_pt_cmd { |
| 355 | bool remote_port; |
| 356 | struct se_cmd se_cmd; |
| 357 | struct xcopy_op *xcopy_op; |
| 358 | struct completion xpt_passthrough_sem; |
Nicholas Bellinger | 366bda1 | 2013-10-24 00:10:36 -0700 | [diff] [blame] | 359 | unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 360 | }; |
| 361 | |
| 362 | static struct se_port xcopy_pt_port; |
| 363 | static struct se_portal_group xcopy_pt_tpg; |
| 364 | static struct se_session xcopy_pt_sess; |
| 365 | static struct se_node_acl xcopy_pt_nacl; |
| 366 | |
| 367 | static char *xcopy_pt_get_fabric_name(void) |
| 368 | { |
| 369 | return "xcopy-pt"; |
| 370 | } |
| 371 | |
| 372 | static u32 xcopy_pt_get_tag(struct se_cmd *se_cmd) |
| 373 | { |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) |
| 378 | { |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) |
| 383 | { |
| 384 | struct configfs_subsystem *subsys = target_core_subsystem[0]; |
| 385 | struct se_device *remote_dev; |
| 386 | |
| 387 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) |
| 388 | remote_dev = xop->dst_dev; |
| 389 | else |
| 390 | remote_dev = xop->src_dev; |
| 391 | |
| 392 | pr_debug("Calling configfs_undepend_item for subsys: %p" |
| 393 | " remote_dev: %p remote_dev->dev_group: %p\n", |
| 394 | subsys, remote_dev, &remote_dev->dev_group.cg_item); |
| 395 | |
| 396 | configfs_undepend_item(subsys, &remote_dev->dev_group.cg_item); |
| 397 | } |
| 398 | |
| 399 | static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) |
| 400 | { |
| 401 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, |
| 402 | struct xcopy_pt_cmd, se_cmd); |
| 403 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 404 | kfree(xpt_cmd); |
| 405 | } |
| 406 | |
| 407 | static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) |
| 408 | { |
| 409 | struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, |
| 410 | struct xcopy_pt_cmd, se_cmd); |
| 411 | |
| 412 | complete(&xpt_cmd->xpt_passthrough_sem); |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | static int xcopy_pt_write_pending(struct se_cmd *se_cmd) |
| 417 | { |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) |
| 422 | { |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) |
| 427 | { |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int xcopy_pt_queue_status(struct se_cmd *se_cmd) |
| 432 | { |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static struct target_core_fabric_ops xcopy_pt_tfo = { |
| 437 | .get_fabric_name = xcopy_pt_get_fabric_name, |
| 438 | .get_task_tag = xcopy_pt_get_tag, |
| 439 | .get_cmd_state = xcopy_pt_get_cmd_state, |
| 440 | .release_cmd = xcopy_pt_release_cmd, |
| 441 | .check_stop_free = xcopy_pt_check_stop_free, |
| 442 | .write_pending = xcopy_pt_write_pending, |
| 443 | .write_pending_status = xcopy_pt_write_pending_status, |
| 444 | .queue_data_in = xcopy_pt_queue_data_in, |
| 445 | .queue_status = xcopy_pt_queue_status, |
| 446 | }; |
| 447 | |
| 448 | /* |
| 449 | * End xcopy_pt_ops |
| 450 | */ |
| 451 | |
| 452 | int target_xcopy_setup_pt(void) |
| 453 | { |
| 454 | xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); |
| 455 | if (!xcopy_wq) { |
| 456 | pr_err("Unable to allocate xcopy_wq\n"); |
| 457 | return -ENOMEM; |
| 458 | } |
| 459 | |
| 460 | memset(&xcopy_pt_port, 0, sizeof(struct se_port)); |
| 461 | INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); |
| 462 | INIT_LIST_HEAD(&xcopy_pt_port.sep_list); |
| 463 | mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); |
| 464 | |
| 465 | memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); |
| 466 | INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); |
| 467 | INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); |
| 468 | INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); |
| 469 | |
| 470 | xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; |
| 471 | xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; |
| 472 | |
| 473 | memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); |
| 474 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); |
| 475 | INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); |
| 476 | memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); |
| 477 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); |
| 478 | INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); |
| 479 | |
| 480 | xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; |
| 481 | xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; |
| 482 | |
| 483 | xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; |
| 484 | xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; |
| 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | void target_xcopy_release_pt(void) |
| 490 | { |
| 491 | if (xcopy_wq) |
| 492 | destroy_workqueue(xcopy_wq); |
| 493 | } |
| 494 | |
| 495 | static void target_xcopy_setup_pt_port( |
| 496 | struct xcopy_pt_cmd *xpt_cmd, |
| 497 | struct xcopy_op *xop, |
| 498 | bool remote_port) |
| 499 | { |
| 500 | struct se_cmd *ec_cmd = xop->xop_se_cmd; |
| 501 | struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; |
| 502 | |
| 503 | if (xop->op_origin == XCOL_SOURCE_RECV_OP) { |
| 504 | /* |
| 505 | * Honor destination port reservations for X-COPY PUSH emulation |
| 506 | * when CDB is received on local source port, and READs blocks to |
| 507 | * WRITE on remote destination port. |
| 508 | */ |
| 509 | if (remote_port) { |
| 510 | xpt_cmd->remote_port = remote_port; |
| 511 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; |
| 512 | pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" |
| 513 | " cmd->se_lun->lun_sep for X-COPY data PUSH\n", |
| 514 | pt_cmd->se_lun->lun_sep); |
| 515 | } else { |
| 516 | pt_cmd->se_lun = ec_cmd->se_lun; |
| 517 | pt_cmd->se_dev = ec_cmd->se_dev; |
| 518 | |
| 519 | pr_debug("Honoring local SRC port from ec_cmd->se_dev:" |
| 520 | " %p\n", pt_cmd->se_dev); |
| 521 | pt_cmd->se_lun = ec_cmd->se_lun; |
| 522 | pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", |
| 523 | pt_cmd->se_lun); |
| 524 | } |
| 525 | } else { |
| 526 | /* |
| 527 | * Honor source port reservation for X-COPY PULL emulation |
| 528 | * when CDB is received on local desintation port, and READs |
| 529 | * blocks from the remote source port to WRITE on local |
| 530 | * destination port. |
| 531 | */ |
| 532 | if (remote_port) { |
| 533 | xpt_cmd->remote_port = remote_port; |
| 534 | pt_cmd->se_lun->lun_sep = &xcopy_pt_port; |
| 535 | pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" |
| 536 | " cmd->se_lun->lun_sep for X-COPY data PULL\n", |
| 537 | pt_cmd->se_lun->lun_sep); |
| 538 | } else { |
| 539 | pt_cmd->se_lun = ec_cmd->se_lun; |
| 540 | pt_cmd->se_dev = ec_cmd->se_dev; |
| 541 | |
| 542 | pr_debug("Honoring local DST port from ec_cmd->se_dev:" |
| 543 | " %p\n", pt_cmd->se_dev); |
| 544 | pt_cmd->se_lun = ec_cmd->se_lun; |
| 545 | pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", |
| 546 | pt_cmd->se_lun); |
| 547 | } |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | static int target_xcopy_init_pt_lun( |
| 552 | struct xcopy_pt_cmd *xpt_cmd, |
| 553 | struct xcopy_op *xop, |
| 554 | struct se_device *se_dev, |
| 555 | struct se_cmd *pt_cmd, |
| 556 | bool remote_port) |
| 557 | { |
| 558 | /* |
| 559 | * Don't allocate + init an pt_cmd->se_lun if honoring local port for |
| 560 | * reservations. The pt_cmd->se_lun pointer will be setup from within |
| 561 | * target_xcopy_setup_pt_port() |
| 562 | */ |
| 563 | if (remote_port == false) { |
| 564 | pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; |
| 565 | return 0; |
| 566 | } |
| 567 | |
Nicholas Bellinger | 4863e52 | 2013-11-08 13:10:44 -0800 | [diff] [blame] | 568 | pt_cmd->se_lun = &se_dev->xcopy_lun; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 569 | pt_cmd->se_dev = se_dev; |
| 570 | |
| 571 | pr_debug("Setup emulated se_dev: %p from se_dev\n", pt_cmd->se_dev); |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 572 | pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; |
| 573 | |
| 574 | pr_debug("Setup emulated se_dev: %p to pt_cmd->se_lun->lun_se_dev\n", |
| 575 | pt_cmd->se_lun->lun_se_dev); |
| 576 | |
| 577 | return 0; |
| 578 | } |
| 579 | |
| 580 | static int target_xcopy_setup_pt_cmd( |
| 581 | struct xcopy_pt_cmd *xpt_cmd, |
| 582 | struct xcopy_op *xop, |
| 583 | struct se_device *se_dev, |
| 584 | unsigned char *cdb, |
| 585 | bool remote_port, |
| 586 | bool alloc_mem) |
| 587 | { |
| 588 | struct se_cmd *cmd = &xpt_cmd->se_cmd; |
| 589 | sense_reason_t sense_rc; |
| 590 | int ret = 0, rc; |
| 591 | /* |
| 592 | * Setup LUN+port to honor reservations based upon xop->op_origin for |
| 593 | * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. |
| 594 | */ |
| 595 | rc = target_xcopy_init_pt_lun(xpt_cmd, xop, se_dev, cmd, remote_port); |
| 596 | if (rc < 0) { |
| 597 | ret = rc; |
| 598 | goto out; |
| 599 | } |
| 600 | xpt_cmd->xcopy_op = xop; |
| 601 | target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); |
| 602 | |
| 603 | sense_rc = target_setup_cmd_from_cdb(cmd, cdb); |
| 604 | if (sense_rc) { |
| 605 | ret = -EINVAL; |
| 606 | goto out; |
| 607 | } |
| 608 | |
| 609 | if (alloc_mem) { |
| 610 | rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
| 611 | cmd->data_length, false); |
| 612 | if (rc < 0) { |
| 613 | ret = rc; |
| 614 | goto out; |
| 615 | } |
| 616 | /* |
| 617 | * Set this bit so that transport_free_pages() allows the |
| 618 | * caller to release SGLs + physical memory allocated by |
| 619 | * transport_generic_get_mem().. |
| 620 | */ |
| 621 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 622 | } else { |
| 623 | /* |
| 624 | * Here the previously allocated SGLs for the internal READ |
| 625 | * are mapped zero-copy to the internal WRITE. |
| 626 | */ |
| 627 | sense_rc = transport_generic_map_mem_to_cmd(cmd, |
| 628 | xop->xop_data_sg, xop->xop_data_nents, |
| 629 | NULL, 0); |
| 630 | if (sense_rc) { |
| 631 | ret = -EINVAL; |
| 632 | goto out; |
| 633 | } |
| 634 | |
| 635 | pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" |
| 636 | " %u\n", cmd->t_data_sg, cmd->t_data_nents); |
| 637 | } |
| 638 | |
| 639 | return 0; |
| 640 | |
| 641 | out: |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 642 | return ret; |
| 643 | } |
| 644 | |
| 645 | static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) |
| 646 | { |
| 647 | struct se_cmd *se_cmd = &xpt_cmd->se_cmd; |
| 648 | sense_reason_t sense_rc; |
| 649 | |
| 650 | sense_rc = transport_generic_new_cmd(se_cmd); |
| 651 | if (sense_rc) |
| 652 | return -EINVAL; |
| 653 | |
| 654 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
| 655 | target_execute_cmd(se_cmd); |
| 656 | |
| 657 | wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); |
| 658 | |
| 659 | pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", |
| 660 | se_cmd->scsi_status); |
Nicholas Bellinger | 8a955d6 | 2013-10-24 00:15:27 -0700 | [diff] [blame] | 661 | |
| 662 | return (se_cmd->scsi_status) ? -EINVAL : 0; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | static int target_xcopy_read_source( |
| 666 | struct se_cmd *ec_cmd, |
| 667 | struct xcopy_op *xop, |
| 668 | struct se_device *src_dev, |
| 669 | sector_t src_lba, |
| 670 | u32 src_sectors) |
| 671 | { |
| 672 | struct xcopy_pt_cmd *xpt_cmd; |
| 673 | struct se_cmd *se_cmd; |
| 674 | u32 length = (src_sectors * src_dev->dev_attrib.block_size); |
| 675 | int rc; |
| 676 | unsigned char cdb[16]; |
| 677 | bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); |
| 678 | |
| 679 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); |
| 680 | if (!xpt_cmd) { |
| 681 | pr_err("Unable to allocate xcopy_pt_cmd\n"); |
| 682 | return -ENOMEM; |
| 683 | } |
| 684 | init_completion(&xpt_cmd->xpt_passthrough_sem); |
| 685 | se_cmd = &xpt_cmd->se_cmd; |
| 686 | |
| 687 | memset(&cdb[0], 0, 16); |
| 688 | cdb[0] = READ_16; |
| 689 | put_unaligned_be64(src_lba, &cdb[2]); |
| 690 | put_unaligned_be32(src_sectors, &cdb[10]); |
| 691 | pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", |
| 692 | (unsigned long long)src_lba, src_sectors, length); |
| 693 | |
| 694 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, |
Nicholas Bellinger | 366bda1 | 2013-10-24 00:10:36 -0700 | [diff] [blame] | 695 | DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 696 | xop->src_pt_cmd = xpt_cmd; |
| 697 | |
| 698 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], |
| 699 | remote_port, true); |
| 700 | if (rc < 0) { |
| 701 | transport_generic_free_cmd(se_cmd, 0); |
| 702 | return rc; |
| 703 | } |
| 704 | |
| 705 | xop->xop_data_sg = se_cmd->t_data_sg; |
| 706 | xop->xop_data_nents = se_cmd->t_data_nents; |
| 707 | pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" |
| 708 | " memory\n", xop->xop_data_sg, xop->xop_data_nents); |
| 709 | |
| 710 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); |
| 711 | if (rc < 0) { |
| 712 | transport_generic_free_cmd(se_cmd, 0); |
| 713 | return rc; |
| 714 | } |
| 715 | /* |
| 716 | * Clear off the allocated t_data_sg, that has been saved for |
| 717 | * zero-copy WRITE submission reuse in struct xcopy_op.. |
| 718 | */ |
| 719 | se_cmd->t_data_sg = NULL; |
| 720 | se_cmd->t_data_nents = 0; |
| 721 | |
| 722 | return 0; |
| 723 | } |
| 724 | |
| 725 | static int target_xcopy_write_destination( |
| 726 | struct se_cmd *ec_cmd, |
| 727 | struct xcopy_op *xop, |
| 728 | struct se_device *dst_dev, |
| 729 | sector_t dst_lba, |
| 730 | u32 dst_sectors) |
| 731 | { |
| 732 | struct xcopy_pt_cmd *xpt_cmd; |
| 733 | struct se_cmd *se_cmd; |
| 734 | u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); |
| 735 | int rc; |
| 736 | unsigned char cdb[16]; |
| 737 | bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); |
| 738 | |
| 739 | xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); |
| 740 | if (!xpt_cmd) { |
| 741 | pr_err("Unable to allocate xcopy_pt_cmd\n"); |
| 742 | return -ENOMEM; |
| 743 | } |
| 744 | init_completion(&xpt_cmd->xpt_passthrough_sem); |
| 745 | se_cmd = &xpt_cmd->se_cmd; |
| 746 | |
| 747 | memset(&cdb[0], 0, 16); |
| 748 | cdb[0] = WRITE_16; |
| 749 | put_unaligned_be64(dst_lba, &cdb[2]); |
| 750 | put_unaligned_be32(dst_sectors, &cdb[10]); |
| 751 | pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", |
| 752 | (unsigned long long)dst_lba, dst_sectors, length); |
| 753 | |
| 754 | transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, |
Nicholas Bellinger | 366bda1 | 2013-10-24 00:10:36 -0700 | [diff] [blame] | 755 | DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 756 | xop->dst_pt_cmd = xpt_cmd; |
| 757 | |
| 758 | rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], |
| 759 | remote_port, false); |
| 760 | if (rc < 0) { |
| 761 | struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; |
| 762 | /* |
| 763 | * If the failure happened before the t_mem_list hand-off in |
| 764 | * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that |
| 765 | * core releases this memory on error during X-COPY WRITE I/O. |
| 766 | */ |
| 767 | src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 768 | src_cmd->t_data_sg = xop->xop_data_sg; |
| 769 | src_cmd->t_data_nents = xop->xop_data_nents; |
| 770 | |
| 771 | transport_generic_free_cmd(se_cmd, 0); |
| 772 | return rc; |
| 773 | } |
| 774 | |
| 775 | rc = target_xcopy_issue_pt_cmd(xpt_cmd); |
| 776 | if (rc < 0) { |
| 777 | se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 778 | transport_generic_free_cmd(se_cmd, 0); |
| 779 | return rc; |
| 780 | } |
| 781 | |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | static void target_xcopy_do_work(struct work_struct *work) |
| 786 | { |
| 787 | struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); |
| 788 | struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; |
| 789 | struct se_cmd *ec_cmd = xop->xop_se_cmd; |
| 790 | sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; |
| 791 | unsigned int max_sectors; |
| 792 | int rc; |
| 793 | unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; |
| 794 | |
| 795 | end_lba = src_lba + nolb; |
| 796 | /* |
| 797 | * Break up XCOPY I/O into hw_max_sectors sized I/O based on the |
| 798 | * smallest max_sectors between src_dev + dev_dev, or |
| 799 | */ |
| 800 | max_sectors = min(src_dev->dev_attrib.hw_max_sectors, |
| 801 | dst_dev->dev_attrib.hw_max_sectors); |
| 802 | max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); |
| 803 | |
| 804 | max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); |
| 805 | |
| 806 | pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", |
| 807 | nolb, max_nolb, (unsigned long long)end_lba); |
| 808 | pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", |
| 809 | (unsigned long long)src_lba, (unsigned long long)dst_lba); |
| 810 | |
| 811 | while (src_lba < end_lba) { |
| 812 | cur_nolb = min(nolb, max_nolb); |
| 813 | |
| 814 | pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," |
| 815 | " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); |
| 816 | |
| 817 | rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); |
| 818 | if (rc < 0) |
| 819 | goto out; |
| 820 | |
| 821 | src_lba += cur_nolb; |
| 822 | pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", |
| 823 | (unsigned long long)src_lba); |
| 824 | |
| 825 | pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," |
| 826 | " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); |
| 827 | |
| 828 | rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, |
| 829 | dst_lba, cur_nolb); |
| 830 | if (rc < 0) { |
| 831 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); |
| 832 | goto out; |
| 833 | } |
| 834 | |
| 835 | dst_lba += cur_nolb; |
| 836 | pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", |
| 837 | (unsigned long long)dst_lba); |
| 838 | |
| 839 | copied_nolb += cur_nolb; |
| 840 | nolb -= cur_nolb; |
| 841 | |
| 842 | transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); |
| 843 | xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
| 844 | |
| 845 | transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); |
| 846 | } |
| 847 | |
| 848 | xcopy_pt_undepend_remotedev(xop); |
| 849 | kfree(xop); |
| 850 | |
| 851 | pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", |
| 852 | (unsigned long long)src_lba, (unsigned long long)dst_lba); |
| 853 | pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", |
| 854 | copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); |
| 855 | |
| 856 | pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); |
| 857 | target_complete_cmd(ec_cmd, SAM_STAT_GOOD); |
| 858 | return; |
| 859 | |
| 860 | out: |
| 861 | xcopy_pt_undepend_remotedev(xop); |
| 862 | kfree(xop); |
| 863 | |
| 864 | pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); |
| 865 | ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; |
| 866 | target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); |
| 867 | } |
| 868 | |
| 869 | sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) |
| 870 | { |
Nicholas Bellinger | acb3f26 | 2013-10-07 18:05:14 -0700 | [diff] [blame] | 871 | struct se_device *dev = se_cmd->se_dev; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 872 | struct xcopy_op *xop = NULL; |
| 873 | unsigned char *p = NULL, *seg_desc; |
| 874 | unsigned int list_id, list_id_usage, sdll, inline_dl, sa; |
Nicholas Bellinger | 48502dd | 2013-10-24 00:27:00 -0700 | [diff] [blame] | 875 | sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 876 | int rc; |
| 877 | unsigned short tdll; |
| 878 | |
Nicholas Bellinger | acb3f26 | 2013-10-07 18:05:14 -0700 | [diff] [blame] | 879 | if (!dev->dev_attrib.emulate_3pc) { |
| 880 | pr_err("EXTENDED_COPY operation explicitly disabled\n"); |
| 881 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
| 882 | } |
| 883 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 884 | sa = se_cmd->t_task_cdb[1] & 0x1f; |
| 885 | if (sa != 0x00) { |
| 886 | pr_err("EXTENDED_COPY(LID4) not supported\n"); |
| 887 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
| 888 | } |
| 889 | |
Nicholas Bellinger | 934a138 | 2013-10-07 15:20:07 -0700 | [diff] [blame] | 890 | xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); |
| 891 | if (!xop) { |
| 892 | pr_err("Unable to allocate xcopy_op\n"); |
| 893 | return TCM_OUT_OF_RESOURCES; |
| 894 | } |
| 895 | xop->xop_se_cmd = se_cmd; |
| 896 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 897 | p = transport_kmap_data_sg(se_cmd); |
| 898 | if (!p) { |
| 899 | pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); |
Nicholas Bellinger | 934a138 | 2013-10-07 15:20:07 -0700 | [diff] [blame] | 900 | kfree(xop); |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 901 | return TCM_OUT_OF_RESOURCES; |
| 902 | } |
| 903 | |
| 904 | list_id = p[0]; |
Nicholas Bellinger | 3f7a46c | 2013-10-07 15:22:15 -0700 | [diff] [blame] | 905 | list_id_usage = (p[1] & 0x18) >> 3; |
| 906 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 907 | /* |
| 908 | * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH |
| 909 | */ |
| 910 | tdll = get_unaligned_be16(&p[2]); |
| 911 | sdll = get_unaligned_be32(&p[8]); |
| 912 | |
| 913 | inline_dl = get_unaligned_be32(&p[12]); |
| 914 | if (inline_dl != 0) { |
| 915 | pr_err("XCOPY with non zero inline data length\n"); |
| 916 | goto out; |
| 917 | } |
| 918 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 919 | pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" |
| 920 | " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, |
| 921 | tdll, sdll, inline_dl); |
| 922 | |
| 923 | rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); |
| 924 | if (rc <= 0) |
| 925 | goto out; |
| 926 | |
Nicholas Bellinger | 48502dd | 2013-10-24 00:27:00 -0700 | [diff] [blame] | 927 | if (xop->src_dev->dev_attrib.block_size != |
| 928 | xop->dst_dev->dev_attrib.block_size) { |
| 929 | pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" |
| 930 | " block_size: %u currently unsupported\n", |
| 931 | xop->src_dev->dev_attrib.block_size, |
| 932 | xop->dst_dev->dev_attrib.block_size); |
| 933 | xcopy_pt_undepend_remotedev(xop); |
| 934 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 935 | goto out; |
| 936 | } |
| 937 | |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 938 | pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, |
| 939 | rc * XCOPY_TARGET_DESC_LEN); |
| 940 | seg_desc = &p[16]; |
| 941 | seg_desc += (rc * XCOPY_TARGET_DESC_LEN); |
| 942 | |
| 943 | rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); |
| 944 | if (rc <= 0) { |
| 945 | xcopy_pt_undepend_remotedev(xop); |
| 946 | goto out; |
| 947 | } |
| 948 | transport_kunmap_data_sg(se_cmd); |
| 949 | |
| 950 | pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, |
| 951 | rc * XCOPY_SEGMENT_DESC_LEN); |
| 952 | INIT_WORK(&xop->xop_work, target_xcopy_do_work); |
| 953 | queue_work(xcopy_wq, &xop->xop_work); |
| 954 | return TCM_NO_SENSE; |
| 955 | |
| 956 | out: |
| 957 | if (p) |
| 958 | transport_kunmap_data_sg(se_cmd); |
| 959 | kfree(xop); |
Nicholas Bellinger | 48502dd | 2013-10-24 00:27:00 -0700 | [diff] [blame] | 960 | return ret; |
Nicholas Bellinger | cbf031f | 2013-08-20 15:38:55 -0700 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) |
| 964 | { |
| 965 | unsigned char *p; |
| 966 | |
| 967 | p = transport_kmap_data_sg(se_cmd); |
| 968 | if (!p) { |
| 969 | pr_err("transport_kmap_data_sg failed in" |
| 970 | " target_rcr_operating_parameters\n"); |
| 971 | return TCM_OUT_OF_RESOURCES; |
| 972 | } |
| 973 | |
| 974 | if (se_cmd->data_length < 54) { |
| 975 | pr_err("Receive Copy Results Op Parameters length" |
| 976 | " too small: %u\n", se_cmd->data_length); |
| 977 | transport_kunmap_data_sg(se_cmd); |
| 978 | return TCM_INVALID_CDB_FIELD; |
| 979 | } |
| 980 | /* |
| 981 | * Set SNLID=1 (Supports no List ID) |
| 982 | */ |
| 983 | p[4] = 0x1; |
| 984 | /* |
| 985 | * MAXIMUM TARGET DESCRIPTOR COUNT |
| 986 | */ |
| 987 | put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); |
| 988 | /* |
| 989 | * MAXIMUM SEGMENT DESCRIPTOR COUNT |
| 990 | */ |
| 991 | put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); |
| 992 | /* |
| 993 | * MAXIMUM DESCRIPTOR LIST LENGTH |
| 994 | */ |
| 995 | put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); |
| 996 | /* |
| 997 | * MAXIMUM SEGMENT LENGTH |
| 998 | */ |
| 999 | put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); |
| 1000 | /* |
| 1001 | * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) |
| 1002 | */ |
| 1003 | put_unaligned_be32(0x0, &p[20]); |
| 1004 | /* |
| 1005 | * HELD DATA LIMIT |
| 1006 | */ |
| 1007 | put_unaligned_be32(0x0, &p[24]); |
| 1008 | /* |
| 1009 | * MAXIMUM STREAM DEVICE TRANSFER SIZE |
| 1010 | */ |
| 1011 | put_unaligned_be32(0x0, &p[28]); |
| 1012 | /* |
| 1013 | * TOTAL CONCURRENT COPIES |
| 1014 | */ |
| 1015 | put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); |
| 1016 | /* |
| 1017 | * MAXIMUM CONCURRENT COPIES |
| 1018 | */ |
| 1019 | p[36] = RCR_OP_MAX_CONCURR_COPIES; |
| 1020 | /* |
| 1021 | * DATA SEGMENT GRANULARITY (log 2) |
| 1022 | */ |
| 1023 | p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; |
| 1024 | /* |
| 1025 | * INLINE DATA GRANULARITY log 2) |
| 1026 | */ |
| 1027 | p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; |
| 1028 | /* |
| 1029 | * HELD DATA GRANULARITY |
| 1030 | */ |
| 1031 | p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; |
| 1032 | /* |
| 1033 | * IMPLEMENTED DESCRIPTOR LIST LENGTH |
| 1034 | */ |
| 1035 | p[43] = 0x2; |
| 1036 | /* |
| 1037 | * List of implemented descriptor type codes (ordered) |
| 1038 | */ |
| 1039 | p[44] = 0x02; /* Copy Block to Block device */ |
| 1040 | p[45] = 0xe4; /* Identification descriptor target descriptor */ |
| 1041 | |
| 1042 | /* |
| 1043 | * AVAILABLE DATA (n-3) |
| 1044 | */ |
| 1045 | put_unaligned_be32(42, &p[0]); |
| 1046 | |
| 1047 | transport_kunmap_data_sg(se_cmd); |
| 1048 | target_complete_cmd(se_cmd, GOOD); |
| 1049 | |
| 1050 | return TCM_NO_SENSE; |
| 1051 | } |
| 1052 | |
| 1053 | sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) |
| 1054 | { |
| 1055 | unsigned char *cdb = &se_cmd->t_task_cdb[0]; |
| 1056 | int sa = (cdb[1] & 0x1f), list_id = cdb[2]; |
| 1057 | sense_reason_t rc = TCM_NO_SENSE; |
| 1058 | |
| 1059 | pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" |
| 1060 | " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); |
| 1061 | |
| 1062 | if (list_id != 0) { |
| 1063 | pr_err("Receive Copy Results with non zero list identifier" |
| 1064 | " not supported\n"); |
| 1065 | return TCM_INVALID_CDB_FIELD; |
| 1066 | } |
| 1067 | |
| 1068 | switch (sa) { |
| 1069 | case RCR_SA_OPERATING_PARAMETERS: |
| 1070 | rc = target_rcr_operating_parameters(se_cmd); |
| 1071 | break; |
| 1072 | case RCR_SA_COPY_STATUS: |
| 1073 | case RCR_SA_RECEIVE_DATA: |
| 1074 | case RCR_SA_FAILED_SEGMENT_DETAILS: |
| 1075 | default: |
| 1076 | pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); |
| 1077 | return TCM_INVALID_CDB_FIELD; |
| 1078 | } |
| 1079 | |
| 1080 | return rc; |
| 1081 | } |