1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2cbf031f4SNicholas Bellinger /******************************************************************************* 3cbf031f4SNicholas Bellinger * Filename: target_core_xcopy.c 4cbf031f4SNicholas Bellinger * 5cbf031f4SNicholas Bellinger * This file contains support for SPC-4 Extended-Copy offload with generic 6cbf031f4SNicholas Bellinger * TCM backends. 7cbf031f4SNicholas Bellinger * 8cbf031f4SNicholas Bellinger * Copyright (c) 2011-2013 Datera, Inc. All rights reserved. 9cbf031f4SNicholas Bellinger * 10cbf031f4SNicholas Bellinger * Author: 11cbf031f4SNicholas Bellinger * Nicholas A. Bellinger <nab@daterainc.com> 12cbf031f4SNicholas Bellinger * 13cbf031f4SNicholas Bellinger ******************************************************************************/ 14cbf031f4SNicholas Bellinger 15cbf031f4SNicholas Bellinger #include <linux/slab.h> 16cbf031f4SNicholas Bellinger #include <linux/spinlock.h> 17cbf031f4SNicholas Bellinger #include <linux/list.h> 18cbf031f4SNicholas Bellinger #include <linux/configfs.h> 198dcf07beSBart Van Assche #include <linux/ratelimit.h> 20ba929992SBart Van Assche #include <scsi/scsi_proto.h> 21cbf031f4SNicholas Bellinger #include <asm/unaligned.h> 22cbf031f4SNicholas Bellinger 23cbf031f4SNicholas Bellinger #include <target/target_core_base.h> 24cbf031f4SNicholas Bellinger #include <target/target_core_backend.h> 25cbf031f4SNicholas Bellinger #include <target/target_core_fabric.h> 26cbf031f4SNicholas Bellinger 27b13876d2SChristoph Hellwig #include "target_core_internal.h" 28cbf031f4SNicholas Bellinger #include "target_core_pr.h" 29cbf031f4SNicholas Bellinger #include "target_core_ua.h" 30cbf031f4SNicholas Bellinger #include "target_core_xcopy.h" 31cbf031f4SNicholas Bellinger 32cbf031f4SNicholas Bellinger static struct workqueue_struct *xcopy_wq = NULL; 33cbf031f4SNicholas Bellinger 34d877d727SBart Van Assche static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop); 35d877d727SBart Van Assche 36cbf031f4SNicholas Bellinger static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) 37cbf031f4SNicholas Bellinger { 38cbf031f4SNicholas Bellinger int off = 0; 39cbf031f4SNicholas Bellinger 40cbf031f4SNicholas Bellinger buf[off++] = (0x6 << 4); 41cbf031f4SNicholas Bellinger buf[off++] = 0x01; 42cbf031f4SNicholas Bellinger buf[off++] = 0x40; 43cbf031f4SNicholas Bellinger buf[off] = (0x5 << 4); 44cbf031f4SNicholas Bellinger 45cbf031f4SNicholas Bellinger spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 46cbf031f4SNicholas Bellinger return 0; 47cbf031f4SNicholas Bellinger } 48cbf031f4SNicholas Bellinger 496906d008SMike Christie struct xcopy_dev_search_info { 506906d008SMike Christie const unsigned char *dev_wwn; 516906d008SMike Christie struct se_device *found_dev; 526906d008SMike Christie }; 536906d008SMike Christie 546906d008SMike Christie static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, 556906d008SMike Christie void *data) 56cbf031f4SNicholas Bellinger { 576906d008SMike Christie struct xcopy_dev_search_info *info = data; 5894aae4caSDavid Disseldorp unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; 59cbf031f4SNicholas Bellinger int rc; 60cbf031f4SNicholas Bellinger 61acb3f260SNicholas Bellinger if (!se_dev->dev_attrib.emulate_3pc) 626906d008SMike Christie return 0; 63acb3f260SNicholas Bellinger 64cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 65cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 66cbf031f4SNicholas Bellinger 676906d008SMike Christie rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 68cbf031f4SNicholas Bellinger if (rc != 0) 696906d008SMike Christie return 0; 70cbf031f4SNicholas Bellinger 716906d008SMike Christie info->found_dev = se_dev; 7294aae4caSDavid Disseldorp pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); 73cbf031f4SNicholas Bellinger 74d588cf8fSChristoph Hellwig rc = target_depend_item(&se_dev->dev_group.cg_item); 75cbf031f4SNicholas Bellinger if (rc != 0) { 766906d008SMike Christie pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n", 776906d008SMike Christie rc, se_dev); 78cbf031f4SNicholas Bellinger return rc; 79cbf031f4SNicholas Bellinger } 80cbf031f4SNicholas Bellinger 816906d008SMike Christie pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n", 826906d008SMike Christie se_dev, &se_dev->dev_group); 836906d008SMike Christie return 1; 84cbf031f4SNicholas Bellinger } 85cbf031f4SNicholas Bellinger 866906d008SMike Christie static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn, 876906d008SMike Christie struct se_device **found_dev) 886906d008SMike Christie { 896906d008SMike Christie struct xcopy_dev_search_info info; 906906d008SMike Christie int ret; 916906d008SMike Christie 926906d008SMike Christie memset(&info, 0, sizeof(info)); 936906d008SMike Christie info.dev_wwn = dev_wwn; 946906d008SMike Christie 956906d008SMike Christie ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info); 966906d008SMike Christie if (ret == 1) { 976906d008SMike Christie *found_dev = info.found_dev; 986906d008SMike Christie return 0; 996906d008SMike Christie } else { 100449a1378SNicholas Bellinger pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 101cbf031f4SNicholas Bellinger return -EINVAL; 102cbf031f4SNicholas Bellinger } 1036906d008SMike Christie } 104cbf031f4SNicholas Bellinger 105cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 10666640d35SDavid Disseldorp unsigned char *p, unsigned short cscd_index) 107cbf031f4SNicholas Bellinger { 108cbf031f4SNicholas Bellinger unsigned char *desc = p; 109cbf031f4SNicholas Bellinger unsigned short ript; 110cbf031f4SNicholas Bellinger u8 desig_len; 111cbf031f4SNicholas Bellinger /* 112cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 113cbf031f4SNicholas Bellinger */ 114cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 115cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 116cbf031f4SNicholas Bellinger /* 117cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 118cbf031f4SNicholas Bellinger */ 119cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 120cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 121cbf031f4SNicholas Bellinger return -EINVAL; 122cbf031f4SNicholas Bellinger } 123cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 124cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 125cbf031f4SNicholas Bellinger return -EINVAL; 126cbf031f4SNicholas Bellinger } 127cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 128cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 129cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 130cbf031f4SNicholas Bellinger return -EINVAL; 131cbf031f4SNicholas Bellinger } 132cbf031f4SNicholas Bellinger /* 133cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 134cbf031f4SNicholas Bellinger * Assigned designator 135cbf031f4SNicholas Bellinger */ 136cbf031f4SNicholas Bellinger desig_len = desc[7]; 13795b1b51eSDavid Disseldorp if (desig_len != XCOPY_NAA_IEEE_REGEX_LEN) { 138cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 139cbf031f4SNicholas Bellinger return -EINVAL; 140cbf031f4SNicholas Bellinger } 141cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 142cbf031f4SNicholas Bellinger /* 143cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 144cbf031f4SNicholas Bellinger */ 145cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 146cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 147cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 148cbf031f4SNicholas Bellinger return -EINVAL; 149cbf031f4SNicholas Bellinger } 150cbf031f4SNicholas Bellinger 15166640d35SDavid Disseldorp if (cscd_index != xop->stdi && cscd_index != xop->dtdi) { 15266640d35SDavid Disseldorp pr_debug("XCOPY 0xe4: ignoring CSCD entry %d - neither src nor " 15366640d35SDavid Disseldorp "dest\n", cscd_index); 15466640d35SDavid Disseldorp return 0; 15566640d35SDavid Disseldorp } 15666640d35SDavid Disseldorp 15766640d35SDavid Disseldorp if (cscd_index == xop->stdi) { 158cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 159cbf031f4SNicholas Bellinger /* 160cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 161cbf031f4SNicholas Bellinger */ 162cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 163cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 164cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 165cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 166cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 167cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 168cbf031f4SNicholas Bellinger } 16966640d35SDavid Disseldorp } 17066640d35SDavid Disseldorp 17166640d35SDavid Disseldorp if (cscd_index == xop->dtdi) { 172cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 173cbf031f4SNicholas Bellinger /* 17466640d35SDavid Disseldorp * Determine if the destination designator matches the local 17566640d35SDavid Disseldorp * device. If @cscd_index corresponds to both source (stdi) and 17666640d35SDavid Disseldorp * destination (dtdi), or dtdi comes after stdi, then 17766640d35SDavid Disseldorp * XCOL_DEST_RECV_OP wins. 178cbf031f4SNicholas Bellinger */ 179cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 180cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 181cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 182cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 183cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 184cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 185cbf031f4SNicholas Bellinger } 186cbf031f4SNicholas Bellinger } 187cbf031f4SNicholas Bellinger 188cbf031f4SNicholas Bellinger return 0; 189cbf031f4SNicholas Bellinger } 190cbf031f4SNicholas Bellinger 191cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 192cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 193449a1378SNicholas Bellinger unsigned short tdll, sense_reason_t *sense_ret) 194cbf031f4SNicholas Bellinger { 195cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 196cbf031f4SNicholas Bellinger unsigned char *desc = p; 19766640d35SDavid Disseldorp int offset = tdll % XCOPY_TARGET_DESC_LEN, rc; 19866640d35SDavid Disseldorp unsigned short cscd_index = 0; 199cbf031f4SNicholas Bellinger unsigned short start = 0; 200cbf031f4SNicholas Bellinger 201449a1378SNicholas Bellinger *sense_ret = TCM_INVALID_PARAMETER_LIST; 202449a1378SNicholas Bellinger 203cbf031f4SNicholas Bellinger if (offset != 0) { 204cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 205cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 206c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 207cbf031f4SNicholas Bellinger return -EINVAL; 208cbf031f4SNicholas Bellinger } 20961c35919SDavid Disseldorp if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) { 210cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 211cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 21261c35919SDavid Disseldorp /* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */ 21361c35919SDavid Disseldorp *sense_ret = TCM_TOO_MANY_TARGET_DESCS; 214cbf031f4SNicholas Bellinger return -EINVAL; 215cbf031f4SNicholas Bellinger } 216cbf031f4SNicholas Bellinger /* 217cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 218cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 219cbf031f4SNicholas Bellinger */ 220cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 221cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 222cbf031f4SNicholas Bellinger 223cbf031f4SNicholas Bellinger while (start < tdll) { 224cbf031f4SNicholas Bellinger /* 22566640d35SDavid Disseldorp * Check target descriptor identification with 0xE4 type, and 22666640d35SDavid Disseldorp * compare the current index with the CSCD descriptor IDs in 22766640d35SDavid Disseldorp * the segment descriptor. Use VPD 0x83 WWPN matching .. 228cbf031f4SNicholas Bellinger */ 229cbf031f4SNicholas Bellinger switch (desc[0]) { 230cbf031f4SNicholas Bellinger case 0xe4: 231cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 23266640d35SDavid Disseldorp &desc[0], cscd_index); 233cbf031f4SNicholas Bellinger if (rc != 0) 234cbf031f4SNicholas Bellinger goto out; 235cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 236cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 23766640d35SDavid Disseldorp cscd_index++; 238cbf031f4SNicholas Bellinger break; 239cbf031f4SNicholas Bellinger default: 240cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 241cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 242c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 243cbf031f4SNicholas Bellinger goto out; 244cbf031f4SNicholas Bellinger } 245cbf031f4SNicholas Bellinger } 246cbf031f4SNicholas Bellinger 24766640d35SDavid Disseldorp switch (xop->op_origin) { 24866640d35SDavid Disseldorp case XCOL_SOURCE_RECV_OP: 24994aae4caSDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(xop->dst_tid_wwn, 25094aae4caSDavid Disseldorp &xop->dst_dev); 25166640d35SDavid Disseldorp break; 25266640d35SDavid Disseldorp case XCOL_DEST_RECV_OP: 25394aae4caSDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(xop->src_tid_wwn, 25494aae4caSDavid Disseldorp &xop->src_dev); 25566640d35SDavid Disseldorp break; 25666640d35SDavid Disseldorp default: 25766640d35SDavid Disseldorp pr_err("XCOPY CSCD descriptor IDs not found in CSCD list - " 25866640d35SDavid Disseldorp "stdi: %hu dtdi: %hu\n", xop->stdi, xop->dtdi); 25966640d35SDavid Disseldorp rc = -EINVAL; 26066640d35SDavid Disseldorp break; 26166640d35SDavid Disseldorp } 262449a1378SNicholas Bellinger /* 263449a1378SNicholas Bellinger * If a matching IEEE NAA 0x83 descriptor for the requested device 264449a1378SNicholas Bellinger * is not located on this node, return COPY_ABORTED with ASQ/ASQC 265449a1378SNicholas Bellinger * 0x0d/0x02 - COPY_TARGET_DEVICE_NOT_REACHABLE to request the 266449a1378SNicholas Bellinger * initiator to fall back to normal copy method. 267449a1378SNicholas Bellinger */ 268449a1378SNicholas Bellinger if (rc < 0) { 269449a1378SNicholas Bellinger *sense_ret = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; 270cbf031f4SNicholas Bellinger goto out; 271449a1378SNicholas Bellinger } 272cbf031f4SNicholas Bellinger 273cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 274cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 275cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 276cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 277cbf031f4SNicholas Bellinger 27866640d35SDavid Disseldorp return cscd_index; 279cbf031f4SNicholas Bellinger 280cbf031f4SNicholas Bellinger out: 281cbf031f4SNicholas Bellinger return -EINVAL; 282cbf031f4SNicholas Bellinger } 283cbf031f4SNicholas Bellinger 284cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 285cbf031f4SNicholas Bellinger unsigned char *p) 286cbf031f4SNicholas Bellinger { 287cbf031f4SNicholas Bellinger unsigned char *desc = p; 288cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 289cbf031f4SNicholas Bellinger unsigned short desc_len; 290cbf031f4SNicholas Bellinger 291cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 292cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 293cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 294cbf031f4SNicholas Bellinger " %hu\n", desc_len); 295cbf031f4SNicholas Bellinger return -EINVAL; 296cbf031f4SNicholas Bellinger } 297cbf031f4SNicholas Bellinger 298cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 299cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 300f184210bSDavid Disseldorp 301f184210bSDavid Disseldorp if (xop->stdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX || 302f184210bSDavid Disseldorp xop->dtdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX) { 303f184210bSDavid Disseldorp pr_err("XCOPY segment desc 0x02: unsupported CSCD ID > 0x%x; stdi: %hu dtdi: %hu\n", 304f184210bSDavid Disseldorp XCOPY_CSCD_DESC_ID_LIST_OFF_MAX, xop->stdi, xop->dtdi); 305f184210bSDavid Disseldorp return -EINVAL; 306f184210bSDavid Disseldorp } 307f184210bSDavid Disseldorp 308cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 309cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 310cbf031f4SNicholas Bellinger 311cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 312cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 313cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 314cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 315cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 316cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 317cbf031f4SNicholas Bellinger 318cbf031f4SNicholas Bellinger if (dc != 0) { 319a85d667eSBart Van Assche xop->dbl = get_unaligned_be24(&desc[29]); 320cbf031f4SNicholas Bellinger 321cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 322cbf031f4SNicholas Bellinger } 323cbf031f4SNicholas Bellinger return 0; 324cbf031f4SNicholas Bellinger } 325cbf031f4SNicholas Bellinger 326cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 327cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 328af9f62c1SDavid Disseldorp unsigned int sdll, sense_reason_t *sense_ret) 329cbf031f4SNicholas Bellinger { 330cbf031f4SNicholas Bellinger unsigned char *desc = p; 331cbf031f4SNicholas Bellinger unsigned int start = 0; 332cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 333cbf031f4SNicholas Bellinger 334af9f62c1SDavid Disseldorp *sense_ret = TCM_INVALID_PARAMETER_LIST; 335af9f62c1SDavid Disseldorp 336cbf031f4SNicholas Bellinger if (offset != 0) { 337cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 338cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 339c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 340cbf031f4SNicholas Bellinger return -EINVAL; 341cbf031f4SNicholas Bellinger } 342af9f62c1SDavid Disseldorp if (sdll > RCR_OP_MAX_SG_DESC_COUNT * XCOPY_SEGMENT_DESC_LEN) { 343af9f62c1SDavid Disseldorp pr_err("XCOPY supports %u segment descriptor(s), sdll: %u too" 344af9f62c1SDavid Disseldorp " large..\n", RCR_OP_MAX_SG_DESC_COUNT, sdll); 345af9f62c1SDavid Disseldorp /* spc4r37 6.4.3.5 SEGMENT DESCRIPTOR LIST LENGTH field */ 346af9f62c1SDavid Disseldorp *sense_ret = TCM_TOO_MANY_SEGMENT_DESCS; 347af9f62c1SDavid Disseldorp return -EINVAL; 348af9f62c1SDavid Disseldorp } 349cbf031f4SNicholas Bellinger 350cbf031f4SNicholas Bellinger while (start < sdll) { 351cbf031f4SNicholas Bellinger /* 352cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 353cbf031f4SNicholas Bellinger */ 354cbf031f4SNicholas Bellinger switch (desc[0]) { 355cbf031f4SNicholas Bellinger case 0x02: 356cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 357cbf031f4SNicholas Bellinger if (rc < 0) 358cbf031f4SNicholas Bellinger goto out; 359cbf031f4SNicholas Bellinger 360cbf031f4SNicholas Bellinger ret++; 361cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 362cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 363cbf031f4SNicholas Bellinger break; 364cbf031f4SNicholas Bellinger default: 3656774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 366cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 367c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 368cbf031f4SNicholas Bellinger goto out; 369cbf031f4SNicholas Bellinger } 370cbf031f4SNicholas Bellinger } 371cbf031f4SNicholas Bellinger 372cbf031f4SNicholas Bellinger return ret; 373cbf031f4SNicholas Bellinger 374cbf031f4SNicholas Bellinger out: 375cbf031f4SNicholas Bellinger return -EINVAL; 376cbf031f4SNicholas Bellinger } 377cbf031f4SNicholas Bellinger 378cbf031f4SNicholas Bellinger /* 379cbf031f4SNicholas Bellinger * Start xcopy_pt ops 380cbf031f4SNicholas Bellinger */ 381cbf031f4SNicholas Bellinger 382cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 383cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 384cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 385366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 386cbf031f4SNicholas Bellinger }; 387cbf031f4SNicholas Bellinger 388adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 389cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 390cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 391cbf031f4SNicholas Bellinger 392cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 393cbf031f4SNicholas Bellinger { 394cbf031f4SNicholas Bellinger return 0; 395cbf031f4SNicholas Bellinger } 396cbf031f4SNicholas Bellinger 397cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 398cbf031f4SNicholas Bellinger { 399cbf031f4SNicholas Bellinger struct se_device *remote_dev; 400cbf031f4SNicholas Bellinger 401cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 402cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 403cbf031f4SNicholas Bellinger else 404cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 405cbf031f4SNicholas Bellinger 406d588cf8fSChristoph Hellwig pr_debug("Calling configfs_undepend_item for" 407cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 408d588cf8fSChristoph Hellwig remote_dev, &remote_dev->dev_group.cg_item); 409cbf031f4SNicholas Bellinger 410d588cf8fSChristoph Hellwig target_undepend_item(&remote_dev->dev_group.cg_item); 411cbf031f4SNicholas Bellinger } 412cbf031f4SNicholas Bellinger 413cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 414cbf031f4SNicholas Bellinger { 415cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 416cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 417cbf031f4SNicholas Bellinger 418cbf031f4SNicholas Bellinger kfree(xpt_cmd); 419cbf031f4SNicholas Bellinger } 420cbf031f4SNicholas Bellinger 421cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 422cbf031f4SNicholas Bellinger { 423cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 424cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 425cbf031f4SNicholas Bellinger 426cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 427cbf031f4SNicholas Bellinger return 0; 428cbf031f4SNicholas Bellinger } 429cbf031f4SNicholas Bellinger 430cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 431cbf031f4SNicholas Bellinger { 432cbf031f4SNicholas Bellinger return 0; 433cbf031f4SNicholas Bellinger } 434cbf031f4SNicholas Bellinger 435cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 436cbf031f4SNicholas Bellinger { 437cbf031f4SNicholas Bellinger return 0; 438cbf031f4SNicholas Bellinger } 439cbf031f4SNicholas Bellinger 440cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 441cbf031f4SNicholas Bellinger { 442cbf031f4SNicholas Bellinger return 0; 443cbf031f4SNicholas Bellinger } 444cbf031f4SNicholas Bellinger 4459ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 44630c7ca93SDavid Disseldorp .fabric_name = "xcopy-pt", 447cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 448cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 449cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 450cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 451cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 452cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 453cbf031f4SNicholas Bellinger }; 454cbf031f4SNicholas Bellinger 455cbf031f4SNicholas Bellinger /* 456cbf031f4SNicholas Bellinger * End xcopy_pt_ops 457cbf031f4SNicholas Bellinger */ 458cbf031f4SNicholas Bellinger 459cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 460cbf031f4SNicholas Bellinger { 461ad669505SBart Van Assche int ret; 462ad669505SBart Van Assche 463cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 464cbf031f4SNicholas Bellinger if (!xcopy_wq) { 465cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 466cbf031f4SNicholas Bellinger return -ENOMEM; 467cbf031f4SNicholas Bellinger } 468cbf031f4SNicholas Bellinger 469cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 470cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 471cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 472cbf031f4SNicholas Bellinger 473cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 474cbf031f4SNicholas Bellinger 475cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 476cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 477cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 478cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 479ad669505SBart Van Assche ret = transport_init_session(&xcopy_pt_sess); 480ad669505SBart Van Assche if (ret < 0) 481ad669505SBart Van Assche return ret; 482cbf031f4SNicholas Bellinger 483cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 484cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 485cbf031f4SNicholas Bellinger 486cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 487cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 488cbf031f4SNicholas Bellinger 489cbf031f4SNicholas Bellinger return 0; 490cbf031f4SNicholas Bellinger } 491cbf031f4SNicholas Bellinger 492cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 493cbf031f4SNicholas Bellinger { 494cbf031f4SNicholas Bellinger if (xcopy_wq) 495cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 496cbf031f4SNicholas Bellinger } 497cbf031f4SNicholas Bellinger 498be71530aSBart Van Assche /* 499be71530aSBart Van Assche * target_xcopy_setup_pt_cmd - set up a pass-through command 500be71530aSBart Van Assche * @xpt_cmd: Data structure to initialize. 501be71530aSBart Van Assche * @xop: Describes the XCOPY operation received from an initiator. 502be71530aSBart Van Assche * @se_dev: Backend device to associate with @xpt_cmd if 503be71530aSBart Van Assche * @remote_port == true. 504be71530aSBart Van Assche * @cdb: SCSI CDB to be copied into @xpt_cmd. 505be71530aSBart Van Assche * @remote_port: If false, use the LUN through which the XCOPY command has 506be71530aSBart Van Assche * been received. If true, use @se_dev->xcopy_lun. 507be71530aSBart Van Assche * @alloc_mem: Whether or not to allocate an SGL list. 508be71530aSBart Van Assche * 509be71530aSBart Van Assche * Set up a SCSI command (READ or WRITE) that will be used to execute an 510be71530aSBart Van Assche * XCOPY command. 511be71530aSBart Van Assche */ 512cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 513cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 514cbf031f4SNicholas Bellinger struct xcopy_op *xop, 515cbf031f4SNicholas Bellinger struct se_device *se_dev, 516cbf031f4SNicholas Bellinger unsigned char *cdb, 517cbf031f4SNicholas Bellinger bool remote_port, 518cbf031f4SNicholas Bellinger bool alloc_mem) 519cbf031f4SNicholas Bellinger { 520cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 521cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 522cbf031f4SNicholas Bellinger int ret = 0, rc; 523be71530aSBart Van Assche 524cbf031f4SNicholas Bellinger /* 525cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 526cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 527cbf031f4SNicholas Bellinger */ 528be71530aSBart Van Assche if (remote_port) { 529be71530aSBart Van Assche cmd->se_lun = &se_dev->xcopy_lun; 530be71530aSBart Van Assche cmd->se_dev = se_dev; 531be71530aSBart Van Assche } else { 532be71530aSBart Van Assche cmd->se_lun = xop->xop_se_cmd->se_lun; 533be71530aSBart Van Assche cmd->se_dev = xop->xop_se_cmd->se_dev; 534be71530aSBart Van Assche } 535be71530aSBart Van Assche cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 536cbf031f4SNicholas Bellinger 537649ee054SBart Van Assche cmd->tag = 0; 538cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 539cbf031f4SNicholas Bellinger if (sense_rc) { 540cbf031f4SNicholas Bellinger ret = -EINVAL; 541cbf031f4SNicholas Bellinger goto out; 542cbf031f4SNicholas Bellinger } 543cbf031f4SNicholas Bellinger 544cbf031f4SNicholas Bellinger if (alloc_mem) { 545cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 546e64aa657SChristoph Hellwig cmd->data_length, false, false); 547cbf031f4SNicholas Bellinger if (rc < 0) { 548cbf031f4SNicholas Bellinger ret = rc; 549cbf031f4SNicholas Bellinger goto out; 550cbf031f4SNicholas Bellinger } 551cbf031f4SNicholas Bellinger /* 552cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 553cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 554cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 555cbf031f4SNicholas Bellinger */ 556cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 557cbf031f4SNicholas Bellinger } else { 558cbf031f4SNicholas Bellinger /* 559cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 560cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 561cbf031f4SNicholas Bellinger */ 562cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 563cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 564cbf031f4SNicholas Bellinger NULL, 0); 565cbf031f4SNicholas Bellinger if (sense_rc) { 566cbf031f4SNicholas Bellinger ret = -EINVAL; 567cbf031f4SNicholas Bellinger goto out; 568cbf031f4SNicholas Bellinger } 569cbf031f4SNicholas Bellinger 570cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 571cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 572cbf031f4SNicholas Bellinger } 573cbf031f4SNicholas Bellinger 574cbf031f4SNicholas Bellinger return 0; 575cbf031f4SNicholas Bellinger 576cbf031f4SNicholas Bellinger out: 577cbf031f4SNicholas Bellinger return ret; 578cbf031f4SNicholas Bellinger } 579cbf031f4SNicholas Bellinger 580cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 581cbf031f4SNicholas Bellinger { 582cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 583cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 584cbf031f4SNicholas Bellinger 585cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 586cbf031f4SNicholas Bellinger if (sense_rc) 587cbf031f4SNicholas Bellinger return -EINVAL; 588cbf031f4SNicholas Bellinger 589cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 590cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 591cbf031f4SNicholas Bellinger 592cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 593cbf031f4SNicholas Bellinger 594cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 595cbf031f4SNicholas Bellinger se_cmd->scsi_status); 5968a955d6dSNicholas Bellinger 5978a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 598cbf031f4SNicholas Bellinger } 599cbf031f4SNicholas Bellinger 600cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 601cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 602cbf031f4SNicholas Bellinger struct xcopy_op *xop, 603cbf031f4SNicholas Bellinger struct se_device *src_dev, 604cbf031f4SNicholas Bellinger sector_t src_lba, 605cbf031f4SNicholas Bellinger u32 src_sectors) 606cbf031f4SNicholas Bellinger { 607cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 608cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 609cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 610cbf031f4SNicholas Bellinger int rc; 611cbf031f4SNicholas Bellinger unsigned char cdb[16]; 612cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 613cbf031f4SNicholas Bellinger 614cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 615cbf031f4SNicholas Bellinger if (!xpt_cmd) { 616cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 617cbf031f4SNicholas Bellinger return -ENOMEM; 618cbf031f4SNicholas Bellinger } 619cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 620cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 621cbf031f4SNicholas Bellinger 622cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 623cbf031f4SNicholas Bellinger cdb[0] = READ_16; 624cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 625cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 626cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 627cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 628cbf031f4SNicholas Bellinger 6294416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 630366bda19SNicholas Bellinger DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 631cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 632cbf031f4SNicholas Bellinger 633cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 634cbf031f4SNicholas Bellinger remote_port, true); 635cbf031f4SNicholas Bellinger if (rc < 0) { 636926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 637cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 638cbf031f4SNicholas Bellinger return rc; 639cbf031f4SNicholas Bellinger } 640cbf031f4SNicholas Bellinger 641cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 642cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 643cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 644cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 645cbf031f4SNicholas Bellinger 646cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 647cbf031f4SNicholas Bellinger if (rc < 0) { 648926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 649cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 650cbf031f4SNicholas Bellinger return rc; 651cbf031f4SNicholas Bellinger } 652cbf031f4SNicholas Bellinger /* 653cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 654cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 655cbf031f4SNicholas Bellinger */ 656cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 657cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 658cbf031f4SNicholas Bellinger 659cbf031f4SNicholas Bellinger return 0; 660cbf031f4SNicholas Bellinger } 661cbf031f4SNicholas Bellinger 662cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 663cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 664cbf031f4SNicholas Bellinger struct xcopy_op *xop, 665cbf031f4SNicholas Bellinger struct se_device *dst_dev, 666cbf031f4SNicholas Bellinger sector_t dst_lba, 667cbf031f4SNicholas Bellinger u32 dst_sectors) 668cbf031f4SNicholas Bellinger { 669cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 670cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 671cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 672cbf031f4SNicholas Bellinger int rc; 673cbf031f4SNicholas Bellinger unsigned char cdb[16]; 674cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 675cbf031f4SNicholas Bellinger 676cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 677cbf031f4SNicholas Bellinger if (!xpt_cmd) { 678cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 679cbf031f4SNicholas Bellinger return -ENOMEM; 680cbf031f4SNicholas Bellinger } 681cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 682cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 683cbf031f4SNicholas Bellinger 684cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 685cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 686cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 687cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 688cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 689cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 690cbf031f4SNicholas Bellinger 6914416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 692366bda19SNicholas Bellinger DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 693cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 694cbf031f4SNicholas Bellinger 695cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 696cbf031f4SNicholas Bellinger remote_port, false); 697cbf031f4SNicholas Bellinger if (rc < 0) { 698cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 699926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 700cbf031f4SNicholas Bellinger /* 701cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 702cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 703cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 704cbf031f4SNicholas Bellinger */ 705cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 706cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 707cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 708cbf031f4SNicholas Bellinger 709cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 710cbf031f4SNicholas Bellinger return rc; 711cbf031f4SNicholas Bellinger } 712cbf031f4SNicholas Bellinger 713cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 714cbf031f4SNicholas Bellinger if (rc < 0) { 715926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 716cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 717cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 718cbf031f4SNicholas Bellinger return rc; 719cbf031f4SNicholas Bellinger } 720cbf031f4SNicholas Bellinger 721cbf031f4SNicholas Bellinger return 0; 722cbf031f4SNicholas Bellinger } 723cbf031f4SNicholas Bellinger 724cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 725cbf031f4SNicholas Bellinger { 726cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 727cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 728d877d727SBart Van Assche struct se_device *src_dev, *dst_dev; 729d877d727SBart Van Assche sector_t src_lba, dst_lba, end_lba; 730cbf031f4SNicholas Bellinger unsigned int max_sectors; 731d877d727SBart Van Assche int rc = 0; 732d877d727SBart Van Assche unsigned short nolb, cur_nolb, max_nolb, copied_nolb = 0; 733cbf031f4SNicholas Bellinger 734d877d727SBart Van Assche if (target_parse_xcopy_cmd(xop) != TCM_NO_SENSE) 735d877d727SBart Van Assche goto err_free; 736d877d727SBart Van Assche 737d877d727SBart Van Assche if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev)) 738d877d727SBart Van Assche goto err_free; 739d877d727SBart Van Assche 740d877d727SBart Van Assche src_dev = xop->src_dev; 741d877d727SBart Van Assche dst_dev = xop->dst_dev; 742d877d727SBart Van Assche src_lba = xop->src_lba; 743d877d727SBart Van Assche dst_lba = xop->dst_lba; 744d877d727SBart Van Assche nolb = xop->nolb; 745cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 746cbf031f4SNicholas Bellinger /* 747cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 748cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 749cbf031f4SNicholas Bellinger */ 750cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 751cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 752cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 753cbf031f4SNicholas Bellinger 754cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 755cbf031f4SNicholas Bellinger 756cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 757cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 758cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 759cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 760cbf031f4SNicholas Bellinger 761cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 762cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 763cbf031f4SNicholas Bellinger 764cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 765cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 766cbf031f4SNicholas Bellinger 767cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 768cbf031f4SNicholas Bellinger if (rc < 0) 769cbf031f4SNicholas Bellinger goto out; 770cbf031f4SNicholas Bellinger 771cbf031f4SNicholas Bellinger src_lba += cur_nolb; 772cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 773cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 774cbf031f4SNicholas Bellinger 775cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 776cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 777cbf031f4SNicholas Bellinger 778cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 779cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 780cbf031f4SNicholas Bellinger if (rc < 0) { 781cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 782cbf031f4SNicholas Bellinger goto out; 783cbf031f4SNicholas Bellinger } 784cbf031f4SNicholas Bellinger 785cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 786cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 787cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 788cbf031f4SNicholas Bellinger 789cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 790cbf031f4SNicholas Bellinger nolb -= cur_nolb; 791cbf031f4SNicholas Bellinger 792cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 793cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 794cbf031f4SNicholas Bellinger 795cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 796cbf031f4SNicholas Bellinger } 797cbf031f4SNicholas Bellinger 798cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 799cbf031f4SNicholas Bellinger kfree(xop); 800cbf031f4SNicholas Bellinger 801cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 802cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 803cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 804cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 805cbf031f4SNicholas Bellinger 806cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 807cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 808cbf031f4SNicholas Bellinger return; 809cbf031f4SNicholas Bellinger 810cbf031f4SNicholas Bellinger out: 811cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 812d877d727SBart Van Assche 813d877d727SBart Van Assche err_free: 814cbf031f4SNicholas Bellinger kfree(xop); 815926317deSDinesh Israni /* 816926317deSDinesh Israni * Don't override an error scsi status if it has already been set 817926317deSDinesh Israni */ 818926317deSDinesh Israni if (ec_cmd->scsi_status == SAM_STAT_GOOD) { 819926317deSDinesh Israni pr_warn_ratelimited("target_xcopy_do_work: rc: %d, Setting X-COPY" 820926317deSDinesh Israni " CHECK_CONDITION -> sending response\n", rc); 821cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 822926317deSDinesh Israni } 8230583c261SNicholas Bellinger target_complete_cmd(ec_cmd, ec_cmd->scsi_status); 824cbf031f4SNicholas Bellinger } 825cbf031f4SNicholas Bellinger 826d877d727SBart Van Assche /* 827d877d727SBart Van Assche * Returns TCM_NO_SENSE upon success or a sense code != TCM_NO_SENSE if parsing 828d877d727SBart Van Assche * fails. 829d877d727SBart Van Assche */ 830d877d727SBart Van Assche static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop) 831cbf031f4SNicholas Bellinger { 832d877d727SBart Van Assche struct se_cmd *se_cmd = xop->xop_se_cmd; 833cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 834d877d727SBart Van Assche unsigned int list_id, list_id_usage, sdll, inline_dl; 83548502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 836cbf031f4SNicholas Bellinger int rc; 837cbf031f4SNicholas Bellinger unsigned short tdll; 838cbf031f4SNicholas Bellinger 839cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 840cbf031f4SNicholas Bellinger if (!p) { 841cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 842cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 843cbf031f4SNicholas Bellinger } 844cbf031f4SNicholas Bellinger 845cbf031f4SNicholas Bellinger list_id = p[0]; 8463f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8473f7a46c6SNicholas Bellinger 848cbf031f4SNicholas Bellinger /* 849cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 850cbf031f4SNicholas Bellinger */ 851cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 852cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 8537d387066SDavid Disseldorp if (tdll + sdll > RCR_OP_MAX_DESC_LIST_LEN) { 8547d387066SDavid Disseldorp pr_err("XCOPY descriptor list length %u exceeds maximum %u\n", 8557d387066SDavid Disseldorp tdll + sdll, RCR_OP_MAX_DESC_LIST_LEN); 8567d387066SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 8577d387066SDavid Disseldorp goto out; 8587d387066SDavid Disseldorp } 859cbf031f4SNicholas Bellinger 860cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 861cbf031f4SNicholas Bellinger if (inline_dl != 0) { 862cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 863cbf031f4SNicholas Bellinger goto out; 864cbf031f4SNicholas Bellinger } 865cbf031f4SNicholas Bellinger 866f94fd098SDavid Disseldorp if (se_cmd->data_length < (XCOPY_HDR_LEN + tdll + sdll + inline_dl)) { 867f94fd098SDavid Disseldorp pr_err("XCOPY parameter truncation: data length %u too small " 868f94fd098SDavid Disseldorp "for tdll: %hu sdll: %u inline_dl: %u\n", 869f94fd098SDavid Disseldorp se_cmd->data_length, tdll, sdll, inline_dl); 870f94fd098SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 871f94fd098SDavid Disseldorp goto out; 872f94fd098SDavid Disseldorp } 873f94fd098SDavid Disseldorp 874cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 875cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 876cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 877cbf031f4SNicholas Bellinger 87866640d35SDavid Disseldorp /* 87966640d35SDavid Disseldorp * skip over the target descriptors until segment descriptors 88066640d35SDavid Disseldorp * have been passed - CSCD ids are needed to determine src and dest. 88166640d35SDavid Disseldorp */ 88266640d35SDavid Disseldorp seg_desc = &p[16] + tdll; 88366640d35SDavid Disseldorp 88466640d35SDavid Disseldorp rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, 88566640d35SDavid Disseldorp sdll, &ret); 88666640d35SDavid Disseldorp if (rc <= 0) 88766640d35SDavid Disseldorp goto out; 88866640d35SDavid Disseldorp 88966640d35SDavid Disseldorp pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 89066640d35SDavid Disseldorp rc * XCOPY_SEGMENT_DESC_LEN); 89166640d35SDavid Disseldorp 892449a1378SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll, &ret); 893cbf031f4SNicholas Bellinger if (rc <= 0) 894cbf031f4SNicholas Bellinger goto out; 895cbf031f4SNicholas Bellinger 89648502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 89748502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 89848502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 89948502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 90048502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 90148502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 90248502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 90348502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 90448502ddbSNicholas Bellinger goto out; 90548502ddbSNicholas Bellinger } 90648502ddbSNicholas Bellinger 907cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 908cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 909cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 910cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 911cbf031f4SNicholas Bellinger 912cbf031f4SNicholas Bellinger out: 913cbf031f4SNicholas Bellinger if (p) 914cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 91548502ddbSNicholas Bellinger return ret; 916cbf031f4SNicholas Bellinger } 917cbf031f4SNicholas Bellinger 918d877d727SBart Van Assche sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 919d877d727SBart Van Assche { 920d877d727SBart Van Assche struct se_device *dev = se_cmd->se_dev; 921d877d727SBart Van Assche struct xcopy_op *xop; 922d877d727SBart Van Assche unsigned int sa; 923d877d727SBart Van Assche 924d877d727SBart Van Assche if (!dev->dev_attrib.emulate_3pc) { 925d877d727SBart Van Assche pr_err("EXTENDED_COPY operation explicitly disabled\n"); 926d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 927d877d727SBart Van Assche } 928d877d727SBart Van Assche 929d877d727SBart Van Assche sa = se_cmd->t_task_cdb[1] & 0x1f; 930d877d727SBart Van Assche if (sa != 0x00) { 931d877d727SBart Van Assche pr_err("EXTENDED_COPY(LID4) not supported\n"); 932d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 933d877d727SBart Van Assche } 934d877d727SBart Van Assche 935d877d727SBart Van Assche if (se_cmd->data_length == 0) { 936d877d727SBart Van Assche target_complete_cmd(se_cmd, SAM_STAT_GOOD); 937d877d727SBart Van Assche return TCM_NO_SENSE; 938d877d727SBart Van Assche } 939d877d727SBart Van Assche if (se_cmd->data_length < XCOPY_HDR_LEN) { 940d877d727SBart Van Assche pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n", 941d877d727SBart Van Assche se_cmd->data_length, XCOPY_HDR_LEN); 942d877d727SBart Van Assche return TCM_PARAMETER_LIST_LENGTH_ERROR; 943d877d727SBart Van Assche } 944d877d727SBart Van Assche 945d877d727SBart Van Assche xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 946d877d727SBart Van Assche if (!xop) 947d877d727SBart Van Assche goto err; 948d877d727SBart Van Assche xop->xop_se_cmd = se_cmd; 949d877d727SBart Van Assche INIT_WORK(&xop->xop_work, target_xcopy_do_work); 950d877d727SBart Van Assche if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work))) 951d877d727SBart Van Assche goto free; 952d877d727SBart Van Assche return TCM_NO_SENSE; 953d877d727SBart Van Assche 954d877d727SBart Van Assche free: 955d877d727SBart Van Assche kfree(xop); 956d877d727SBart Van Assche 957d877d727SBart Van Assche err: 958d877d727SBart Van Assche return TCM_OUT_OF_RESOURCES; 959d877d727SBart Van Assche } 960d877d727SBart Van Assche 961cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 962cbf031f4SNicholas Bellinger { 963cbf031f4SNicholas Bellinger unsigned char *p; 964cbf031f4SNicholas Bellinger 965cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 966cbf031f4SNicholas Bellinger if (!p) { 967cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 968cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 969cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 970cbf031f4SNicholas Bellinger } 971cbf031f4SNicholas Bellinger 972cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 973cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 974cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 975cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 976cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 977cbf031f4SNicholas Bellinger } 978cbf031f4SNicholas Bellinger /* 979cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 980cbf031f4SNicholas Bellinger */ 981cbf031f4SNicholas Bellinger p[4] = 0x1; 982cbf031f4SNicholas Bellinger /* 983cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 984cbf031f4SNicholas Bellinger */ 985cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 986cbf031f4SNicholas Bellinger /* 987cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 988cbf031f4SNicholas Bellinger */ 989cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 990cbf031f4SNicholas Bellinger /* 991cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 992cbf031f4SNicholas Bellinger */ 993cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 994cbf031f4SNicholas Bellinger /* 995cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 996cbf031f4SNicholas Bellinger */ 997cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 998cbf031f4SNicholas Bellinger /* 999cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 1000cbf031f4SNicholas Bellinger */ 1001cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 1002cbf031f4SNicholas Bellinger /* 1003cbf031f4SNicholas Bellinger * HELD DATA LIMIT 1004cbf031f4SNicholas Bellinger */ 1005cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 1006cbf031f4SNicholas Bellinger /* 1007cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 1008cbf031f4SNicholas Bellinger */ 1009cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 1010cbf031f4SNicholas Bellinger /* 1011cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 1012cbf031f4SNicholas Bellinger */ 1013cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 1014cbf031f4SNicholas Bellinger /* 1015cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 1016cbf031f4SNicholas Bellinger */ 1017cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 1018cbf031f4SNicholas Bellinger /* 1019cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 1020cbf031f4SNicholas Bellinger */ 1021cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 1022cbf031f4SNicholas Bellinger /* 1023cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 1024cbf031f4SNicholas Bellinger */ 1025cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 1026cbf031f4SNicholas Bellinger /* 1027cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 1028cbf031f4SNicholas Bellinger */ 1029cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 1030cbf031f4SNicholas Bellinger /* 1031cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 1032cbf031f4SNicholas Bellinger */ 1033cbf031f4SNicholas Bellinger p[43] = 0x2; 1034cbf031f4SNicholas Bellinger /* 1035cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 1036cbf031f4SNicholas Bellinger */ 1037cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 1038cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 1039cbf031f4SNicholas Bellinger 1040cbf031f4SNicholas Bellinger /* 1041cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 1042cbf031f4SNicholas Bellinger */ 1043cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1044cbf031f4SNicholas Bellinger 1045cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1046cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1047cbf031f4SNicholas Bellinger 1048cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1049cbf031f4SNicholas Bellinger } 1050cbf031f4SNicholas Bellinger 1051cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1052cbf031f4SNicholas Bellinger { 1053cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1054cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1055cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1056cbf031f4SNicholas Bellinger 1057cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1058cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1059cbf031f4SNicholas Bellinger 1060cbf031f4SNicholas Bellinger if (list_id != 0) { 1061cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1062cbf031f4SNicholas Bellinger " not supported\n"); 1063cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1064cbf031f4SNicholas Bellinger } 1065cbf031f4SNicholas Bellinger 1066cbf031f4SNicholas Bellinger switch (sa) { 1067cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1068cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1069cbf031f4SNicholas Bellinger break; 1070cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1071cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1072cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1073cbf031f4SNicholas Bellinger default: 1074cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1075cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1076cbf031f4SNicholas Bellinger } 1077cbf031f4SNicholas Bellinger 1078cbf031f4SNicholas Bellinger return rc; 1079cbf031f4SNicholas Bellinger } 1080