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 362896c938SDavid Disseldorp /** 372896c938SDavid Disseldorp * target_xcopy_locate_se_dev_e4_iter - compare XCOPY NAA device identifiers 382896c938SDavid Disseldorp * 392896c938SDavid Disseldorp * @se_dev: device being considered for match 402896c938SDavid Disseldorp * @dev_wwn: XCOPY requested NAA dev_wwn 412896c938SDavid Disseldorp * @return: 1 on match, 0 on no-match 422896c938SDavid Disseldorp */ 436906d008SMike Christie static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, 442896c938SDavid Disseldorp const unsigned char *dev_wwn) 45cbf031f4SNicholas Bellinger { 4694aae4caSDavid Disseldorp unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; 47cbf031f4SNicholas Bellinger int rc; 48cbf031f4SNicholas Bellinger 492896c938SDavid Disseldorp if (!se_dev->dev_attrib.emulate_3pc) { 502896c938SDavid Disseldorp pr_debug("XCOPY: emulate_3pc disabled on se_dev %p\n", se_dev); 516906d008SMike Christie return 0; 522896c938SDavid Disseldorp } 53acb3f260SNicholas Bellinger 54cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 5517f947b8SSergey Samoylenko spc_gen_naa_6h_vendor_specific(se_dev, &tmp_dev_wwn[0]); 56cbf031f4SNicholas Bellinger 572896c938SDavid Disseldorp rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 582896c938SDavid Disseldorp if (rc != 0) { 592896c938SDavid Disseldorp pr_debug("XCOPY: skip non-matching: %*ph\n", 602896c938SDavid Disseldorp XCOPY_NAA_IEEE_REGEX_LEN, tmp_dev_wwn); 616906d008SMike Christie return 0; 622896c938SDavid Disseldorp } 6394aae4caSDavid Disseldorp pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); 64cbf031f4SNicholas Bellinger 656906d008SMike Christie return 1; 66cbf031f4SNicholas Bellinger } 67cbf031f4SNicholas Bellinger 682896c938SDavid Disseldorp static int target_xcopy_locate_se_dev_e4(struct se_session *sess, 692896c938SDavid Disseldorp const unsigned char *dev_wwn, 702896c938SDavid Disseldorp struct se_device **_found_dev, 712896c938SDavid Disseldorp struct percpu_ref **_found_lun_ref) 726906d008SMike Christie { 732896c938SDavid Disseldorp struct se_dev_entry *deve; 742896c938SDavid Disseldorp struct se_node_acl *nacl; 752896c938SDavid Disseldorp struct se_lun *this_lun = NULL; 762896c938SDavid Disseldorp struct se_device *found_dev = NULL; 776906d008SMike Christie 782896c938SDavid Disseldorp /* cmd with NULL sess indicates no associated $FABRIC_MOD */ 792896c938SDavid Disseldorp if (!sess) 802896c938SDavid Disseldorp goto err_out; 816906d008SMike Christie 822896c938SDavid Disseldorp pr_debug("XCOPY 0xe4: searching for: %*ph\n", 832896c938SDavid Disseldorp XCOPY_NAA_IEEE_REGEX_LEN, dev_wwn); 842896c938SDavid Disseldorp 852896c938SDavid Disseldorp nacl = sess->se_node_acl; 862896c938SDavid Disseldorp rcu_read_lock(); 872896c938SDavid Disseldorp hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 882896c938SDavid Disseldorp struct se_device *this_dev; 892896c938SDavid Disseldorp int rc; 902896c938SDavid Disseldorp 91*ef4f7e4bSDmitry Bogdanov this_lun = deve->se_lun; 922896c938SDavid Disseldorp this_dev = rcu_dereference_raw(this_lun->lun_se_dev); 932896c938SDavid Disseldorp 942896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4_iter(this_dev, dev_wwn); 952896c938SDavid Disseldorp if (rc) { 962896c938SDavid Disseldorp if (percpu_ref_tryget_live(&this_lun->lun_ref)) 972896c938SDavid Disseldorp found_dev = this_dev; 982896c938SDavid Disseldorp break; 992896c938SDavid Disseldorp } 1002896c938SDavid Disseldorp } 1012896c938SDavid Disseldorp rcu_read_unlock(); 1022896c938SDavid Disseldorp if (found_dev == NULL) 1032896c938SDavid Disseldorp goto err_out; 1042896c938SDavid Disseldorp 1052896c938SDavid Disseldorp pr_debug("lun_ref held for se_dev: %p se_dev->se_dev_group: %p\n", 1062896c938SDavid Disseldorp found_dev, &found_dev->dev_group); 1072896c938SDavid Disseldorp *_found_dev = found_dev; 1082896c938SDavid Disseldorp *_found_lun_ref = &this_lun->lun_ref; 1096906d008SMike Christie return 0; 1102896c938SDavid Disseldorp err_out: 111449a1378SNicholas Bellinger pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 112cbf031f4SNicholas Bellinger return -EINVAL; 113cbf031f4SNicholas Bellinger } 114cbf031f4SNicholas Bellinger 115cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 11666640d35SDavid Disseldorp unsigned char *p, unsigned short cscd_index) 117cbf031f4SNicholas Bellinger { 118cbf031f4SNicholas Bellinger unsigned char *desc = p; 119cbf031f4SNicholas Bellinger unsigned short ript; 120cbf031f4SNicholas Bellinger u8 desig_len; 121cbf031f4SNicholas Bellinger /* 122cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 123cbf031f4SNicholas Bellinger */ 124cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 125cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 126cbf031f4SNicholas Bellinger /* 127cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 128cbf031f4SNicholas Bellinger */ 129cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 130cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 131cbf031f4SNicholas Bellinger return -EINVAL; 132cbf031f4SNicholas Bellinger } 133cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 134cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 135cbf031f4SNicholas Bellinger return -EINVAL; 136cbf031f4SNicholas Bellinger } 137cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 138cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 139cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 140cbf031f4SNicholas Bellinger return -EINVAL; 141cbf031f4SNicholas Bellinger } 142cbf031f4SNicholas Bellinger /* 143cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 144cbf031f4SNicholas Bellinger * Assigned designator 145cbf031f4SNicholas Bellinger */ 146cbf031f4SNicholas Bellinger desig_len = desc[7]; 14795b1b51eSDavid Disseldorp if (desig_len != XCOPY_NAA_IEEE_REGEX_LEN) { 148cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 149cbf031f4SNicholas Bellinger return -EINVAL; 150cbf031f4SNicholas Bellinger } 151cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 152cbf031f4SNicholas Bellinger /* 153cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 154cbf031f4SNicholas Bellinger */ 155cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 156cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 157cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 158cbf031f4SNicholas Bellinger return -EINVAL; 159cbf031f4SNicholas Bellinger } 160cbf031f4SNicholas Bellinger 16166640d35SDavid Disseldorp if (cscd_index != xop->stdi && cscd_index != xop->dtdi) { 16266640d35SDavid Disseldorp pr_debug("XCOPY 0xe4: ignoring CSCD entry %d - neither src nor " 16366640d35SDavid Disseldorp "dest\n", cscd_index); 16466640d35SDavid Disseldorp return 0; 16566640d35SDavid Disseldorp } 16666640d35SDavid Disseldorp 16766640d35SDavid Disseldorp if (cscd_index == xop->stdi) { 168cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 169cbf031f4SNicholas Bellinger /* 170cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 171cbf031f4SNicholas Bellinger */ 172cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 173cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 174cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 175cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 176cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 177cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 178cbf031f4SNicholas Bellinger } 17966640d35SDavid Disseldorp } 18066640d35SDavid Disseldorp 18166640d35SDavid Disseldorp if (cscd_index == xop->dtdi) { 182cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 183cbf031f4SNicholas Bellinger /* 18466640d35SDavid Disseldorp * Determine if the destination designator matches the local 18566640d35SDavid Disseldorp * device. If @cscd_index corresponds to both source (stdi) and 18666640d35SDavid Disseldorp * destination (dtdi), or dtdi comes after stdi, then 18766640d35SDavid Disseldorp * XCOL_DEST_RECV_OP wins. 188cbf031f4SNicholas Bellinger */ 189cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 190cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 191cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 192cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 193cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 194cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 195cbf031f4SNicholas Bellinger } 196cbf031f4SNicholas Bellinger } 197cbf031f4SNicholas Bellinger 198cbf031f4SNicholas Bellinger return 0; 199cbf031f4SNicholas Bellinger } 200cbf031f4SNicholas Bellinger 201cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 202cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 203449a1378SNicholas Bellinger unsigned short tdll, sense_reason_t *sense_ret) 204cbf031f4SNicholas Bellinger { 205cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 206cbf031f4SNicholas Bellinger unsigned char *desc = p; 20766640d35SDavid Disseldorp int offset = tdll % XCOPY_TARGET_DESC_LEN, rc; 20866640d35SDavid Disseldorp unsigned short cscd_index = 0; 209cbf031f4SNicholas Bellinger unsigned short start = 0; 210cbf031f4SNicholas Bellinger 211449a1378SNicholas Bellinger *sense_ret = TCM_INVALID_PARAMETER_LIST; 212449a1378SNicholas Bellinger 213cbf031f4SNicholas Bellinger if (offset != 0) { 214cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 215cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 216c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 217cbf031f4SNicholas Bellinger return -EINVAL; 218cbf031f4SNicholas Bellinger } 21961c35919SDavid Disseldorp if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) { 220cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 221cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 22261c35919SDavid Disseldorp /* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */ 22361c35919SDavid Disseldorp *sense_ret = TCM_TOO_MANY_TARGET_DESCS; 224cbf031f4SNicholas Bellinger return -EINVAL; 225cbf031f4SNicholas Bellinger } 226cbf031f4SNicholas Bellinger /* 227cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 228cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 229cbf031f4SNicholas Bellinger */ 230cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 23117f947b8SSergey Samoylenko spc_gen_naa_6h_vendor_specific(local_dev, &xop->local_dev_wwn[0]); 232cbf031f4SNicholas Bellinger 233cbf031f4SNicholas Bellinger while (start < tdll) { 234cbf031f4SNicholas Bellinger /* 23566640d35SDavid Disseldorp * Check target descriptor identification with 0xE4 type, and 23666640d35SDavid Disseldorp * compare the current index with the CSCD descriptor IDs in 23766640d35SDavid Disseldorp * the segment descriptor. Use VPD 0x83 WWPN matching .. 238cbf031f4SNicholas Bellinger */ 239cbf031f4SNicholas Bellinger switch (desc[0]) { 240cbf031f4SNicholas Bellinger case 0xe4: 241cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 24266640d35SDavid Disseldorp &desc[0], cscd_index); 243cbf031f4SNicholas Bellinger if (rc != 0) 244cbf031f4SNicholas Bellinger goto out; 245cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 246cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 24766640d35SDavid Disseldorp cscd_index++; 248cbf031f4SNicholas Bellinger break; 249cbf031f4SNicholas Bellinger default: 250cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 251cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 252c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 253cbf031f4SNicholas Bellinger goto out; 254cbf031f4SNicholas Bellinger } 255cbf031f4SNicholas Bellinger } 256cbf031f4SNicholas Bellinger 25766640d35SDavid Disseldorp switch (xop->op_origin) { 25866640d35SDavid Disseldorp case XCOL_SOURCE_RECV_OP: 2592896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, 2602896c938SDavid Disseldorp xop->dst_tid_wwn, 2612896c938SDavid Disseldorp &xop->dst_dev, 2622896c938SDavid Disseldorp &xop->remote_lun_ref); 26366640d35SDavid Disseldorp break; 26466640d35SDavid Disseldorp case XCOL_DEST_RECV_OP: 2652896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, 2662896c938SDavid Disseldorp xop->src_tid_wwn, 2672896c938SDavid Disseldorp &xop->src_dev, 2682896c938SDavid Disseldorp &xop->remote_lun_ref); 26966640d35SDavid Disseldorp break; 27066640d35SDavid Disseldorp default: 27166640d35SDavid Disseldorp pr_err("XCOPY CSCD descriptor IDs not found in CSCD list - " 27266640d35SDavid Disseldorp "stdi: %hu dtdi: %hu\n", xop->stdi, xop->dtdi); 27366640d35SDavid Disseldorp rc = -EINVAL; 27466640d35SDavid Disseldorp break; 27566640d35SDavid Disseldorp } 276449a1378SNicholas Bellinger /* 277449a1378SNicholas Bellinger * If a matching IEEE NAA 0x83 descriptor for the requested device 278449a1378SNicholas Bellinger * is not located on this node, return COPY_ABORTED with ASQ/ASQC 279449a1378SNicholas Bellinger * 0x0d/0x02 - COPY_TARGET_DEVICE_NOT_REACHABLE to request the 280449a1378SNicholas Bellinger * initiator to fall back to normal copy method. 281449a1378SNicholas Bellinger */ 282449a1378SNicholas Bellinger if (rc < 0) { 283449a1378SNicholas Bellinger *sense_ret = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; 284cbf031f4SNicholas Bellinger goto out; 285449a1378SNicholas Bellinger } 286cbf031f4SNicholas Bellinger 287cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 288cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 289cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 290cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 291cbf031f4SNicholas Bellinger 29266640d35SDavid Disseldorp return cscd_index; 293cbf031f4SNicholas Bellinger 294cbf031f4SNicholas Bellinger out: 295cbf031f4SNicholas Bellinger return -EINVAL; 296cbf031f4SNicholas Bellinger } 297cbf031f4SNicholas Bellinger 2987e642ca0SLi Feng static int target_xcopy_parse_segdesc_02(struct xcopy_op *xop, unsigned char *p) 299cbf031f4SNicholas Bellinger { 300cbf031f4SNicholas Bellinger unsigned char *desc = p; 301cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 302cbf031f4SNicholas Bellinger unsigned short desc_len; 303cbf031f4SNicholas Bellinger 304cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 305cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 306cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 307cbf031f4SNicholas Bellinger " %hu\n", desc_len); 308cbf031f4SNicholas Bellinger return -EINVAL; 309cbf031f4SNicholas Bellinger } 310cbf031f4SNicholas Bellinger 311cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 312cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 313f184210bSDavid Disseldorp 314f184210bSDavid Disseldorp if (xop->stdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX || 315f184210bSDavid Disseldorp xop->dtdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX) { 316f184210bSDavid Disseldorp pr_err("XCOPY segment desc 0x02: unsupported CSCD ID > 0x%x; stdi: %hu dtdi: %hu\n", 317f184210bSDavid Disseldorp XCOPY_CSCD_DESC_ID_LIST_OFF_MAX, xop->stdi, xop->dtdi); 318f184210bSDavid Disseldorp return -EINVAL; 319f184210bSDavid Disseldorp } 320f184210bSDavid Disseldorp 321cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 322cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 323cbf031f4SNicholas Bellinger 324cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 325cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 326cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 327cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 328cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 329cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 330cbf031f4SNicholas Bellinger 331cbf031f4SNicholas Bellinger return 0; 332cbf031f4SNicholas Bellinger } 333cbf031f4SNicholas Bellinger 3347e642ca0SLi Feng static int target_xcopy_parse_segment_descriptors(struct xcopy_op *xop, 3357e642ca0SLi Feng unsigned char *p, unsigned int sdll, 3367e642ca0SLi Feng sense_reason_t *sense_ret) 337cbf031f4SNicholas Bellinger { 338cbf031f4SNicholas Bellinger unsigned char *desc = p; 339cbf031f4SNicholas Bellinger unsigned int start = 0; 340cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 341cbf031f4SNicholas Bellinger 342af9f62c1SDavid Disseldorp *sense_ret = TCM_INVALID_PARAMETER_LIST; 343af9f62c1SDavid Disseldorp 344cbf031f4SNicholas Bellinger if (offset != 0) { 345cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 346cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 347c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 348cbf031f4SNicholas Bellinger return -EINVAL; 349cbf031f4SNicholas Bellinger } 350af9f62c1SDavid Disseldorp if (sdll > RCR_OP_MAX_SG_DESC_COUNT * XCOPY_SEGMENT_DESC_LEN) { 351af9f62c1SDavid Disseldorp pr_err("XCOPY supports %u segment descriptor(s), sdll: %u too" 352af9f62c1SDavid Disseldorp " large..\n", RCR_OP_MAX_SG_DESC_COUNT, sdll); 353af9f62c1SDavid Disseldorp /* spc4r37 6.4.3.5 SEGMENT DESCRIPTOR LIST LENGTH field */ 354af9f62c1SDavid Disseldorp *sense_ret = TCM_TOO_MANY_SEGMENT_DESCS; 355af9f62c1SDavid Disseldorp return -EINVAL; 356af9f62c1SDavid Disseldorp } 357cbf031f4SNicholas Bellinger 358cbf031f4SNicholas Bellinger while (start < sdll) { 359cbf031f4SNicholas Bellinger /* 360cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 361cbf031f4SNicholas Bellinger */ 362cbf031f4SNicholas Bellinger switch (desc[0]) { 363cbf031f4SNicholas Bellinger case 0x02: 3647e642ca0SLi Feng rc = target_xcopy_parse_segdesc_02(xop, desc); 365cbf031f4SNicholas Bellinger if (rc < 0) 366cbf031f4SNicholas Bellinger goto out; 367cbf031f4SNicholas Bellinger 368cbf031f4SNicholas Bellinger ret++; 369cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 370cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 371cbf031f4SNicholas Bellinger break; 372cbf031f4SNicholas Bellinger default: 3736774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 374cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 375c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 376cbf031f4SNicholas Bellinger goto out; 377cbf031f4SNicholas Bellinger } 378cbf031f4SNicholas Bellinger } 379cbf031f4SNicholas Bellinger 380cbf031f4SNicholas Bellinger return ret; 381cbf031f4SNicholas Bellinger 382cbf031f4SNicholas Bellinger out: 383cbf031f4SNicholas Bellinger return -EINVAL; 384cbf031f4SNicholas Bellinger } 385cbf031f4SNicholas Bellinger 386cbf031f4SNicholas Bellinger /* 387cbf031f4SNicholas Bellinger * Start xcopy_pt ops 388cbf031f4SNicholas Bellinger */ 389cbf031f4SNicholas Bellinger 390cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 391cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 392cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 393366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 394cbf031f4SNicholas Bellinger }; 395cbf031f4SNicholas Bellinger 396adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 397cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 398cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 399cbf031f4SNicholas Bellinger 400cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 401cbf031f4SNicholas Bellinger { 402cbf031f4SNicholas Bellinger return 0; 403cbf031f4SNicholas Bellinger } 404cbf031f4SNicholas Bellinger 405cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 406cbf031f4SNicholas Bellinger { 407cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 4082896c938SDavid Disseldorp pr_debug("putting dst lun_ref for %p\n", xop->dst_dev); 409cbf031f4SNicholas Bellinger else 4102896c938SDavid Disseldorp pr_debug("putting src lun_ref for %p\n", xop->src_dev); 411cbf031f4SNicholas Bellinger 4122896c938SDavid Disseldorp percpu_ref_put(xop->remote_lun_ref); 413cbf031f4SNicholas Bellinger } 414cbf031f4SNicholas Bellinger 415cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 416cbf031f4SNicholas Bellinger { 417cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 418cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 419cbf031f4SNicholas Bellinger 420b92fcfcbSDavid Disseldorp /* xpt_cmd is on the stack, nothing to free here */ 421b92fcfcbSDavid Disseldorp pr_debug("xpt_cmd done: %p\n", xpt_cmd); 422cbf031f4SNicholas Bellinger } 423cbf031f4SNicholas Bellinger 424cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 425cbf031f4SNicholas Bellinger { 426cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 427cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 428cbf031f4SNicholas Bellinger 429cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 430cbf031f4SNicholas Bellinger return 0; 431cbf031f4SNicholas Bellinger } 432cbf031f4SNicholas Bellinger 433cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 434cbf031f4SNicholas Bellinger { 435cbf031f4SNicholas Bellinger return 0; 436cbf031f4SNicholas Bellinger } 437cbf031f4SNicholas Bellinger 438cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 439cbf031f4SNicholas Bellinger { 440cbf031f4SNicholas Bellinger return 0; 441cbf031f4SNicholas Bellinger } 442cbf031f4SNicholas Bellinger 443cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 444cbf031f4SNicholas Bellinger { 445cbf031f4SNicholas Bellinger return 0; 446cbf031f4SNicholas Bellinger } 447cbf031f4SNicholas Bellinger 4489ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 44930c7ca93SDavid Disseldorp .fabric_name = "xcopy-pt", 450cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 451cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 452cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 453cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 454cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 455cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 456cbf031f4SNicholas Bellinger }; 457cbf031f4SNicholas Bellinger 458cbf031f4SNicholas Bellinger /* 459cbf031f4SNicholas Bellinger * End xcopy_pt_ops 460cbf031f4SNicholas Bellinger */ 461cbf031f4SNicholas Bellinger 462cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 463cbf031f4SNicholas Bellinger { 464ad669505SBart Van Assche int ret; 465ad669505SBart Van Assche 466cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 467cbf031f4SNicholas Bellinger if (!xcopy_wq) { 468cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 469cbf031f4SNicholas Bellinger return -ENOMEM; 470cbf031f4SNicholas Bellinger } 471cbf031f4SNicholas Bellinger 472cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 473cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 474cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 475cbf031f4SNicholas Bellinger 476cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 477cbf031f4SNicholas Bellinger 478cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 479cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 480cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 481cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 482ad669505SBart Van Assche ret = transport_init_session(&xcopy_pt_sess); 483ad669505SBart Van Assche if (ret < 0) 4843c006c7dSMike Christie goto destroy_wq; 485cbf031f4SNicholas Bellinger 486cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 487cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 488cbf031f4SNicholas Bellinger 489cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 490cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 491cbf031f4SNicholas Bellinger 492cbf031f4SNicholas Bellinger return 0; 4933c006c7dSMike Christie 4943c006c7dSMike Christie destroy_wq: 4953c006c7dSMike Christie destroy_workqueue(xcopy_wq); 4963c006c7dSMike Christie xcopy_wq = NULL; 4973c006c7dSMike Christie return ret; 498cbf031f4SNicholas Bellinger } 499cbf031f4SNicholas Bellinger 500cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 501cbf031f4SNicholas Bellinger { 5023c006c7dSMike Christie if (xcopy_wq) { 503cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 5043c006c7dSMike Christie transport_uninit_session(&xcopy_pt_sess); 5053c006c7dSMike Christie } 506cbf031f4SNicholas Bellinger } 507cbf031f4SNicholas Bellinger 508be71530aSBart Van Assche /* 509be71530aSBart Van Assche * target_xcopy_setup_pt_cmd - set up a pass-through command 510be71530aSBart Van Assche * @xpt_cmd: Data structure to initialize. 511be71530aSBart Van Assche * @xop: Describes the XCOPY operation received from an initiator. 512be71530aSBart Van Assche * @se_dev: Backend device to associate with @xpt_cmd if 513be71530aSBart Van Assche * @remote_port == true. 514be71530aSBart Van Assche * @cdb: SCSI CDB to be copied into @xpt_cmd. 515be71530aSBart Van Assche * @remote_port: If false, use the LUN through which the XCOPY command has 516be71530aSBart Van Assche * been received. If true, use @se_dev->xcopy_lun. 517be71530aSBart Van Assche * 518be71530aSBart Van Assche * Set up a SCSI command (READ or WRITE) that will be used to execute an 519be71530aSBart Van Assche * XCOPY command. 520be71530aSBart Van Assche */ 521cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 522cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 523cbf031f4SNicholas Bellinger struct xcopy_op *xop, 524cbf031f4SNicholas Bellinger struct se_device *se_dev, 525cbf031f4SNicholas Bellinger unsigned char *cdb, 5260ad08996SDavid Disseldorp bool remote_port) 527cbf031f4SNicholas Bellinger { 528cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 529be71530aSBart Van Assche 530cbf031f4SNicholas Bellinger /* 531cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 532cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 533cbf031f4SNicholas Bellinger */ 534be71530aSBart Van Assche if (remote_port) { 535be71530aSBart Van Assche cmd->se_lun = &se_dev->xcopy_lun; 536be71530aSBart Van Assche cmd->se_dev = se_dev; 537be71530aSBart Van Assche } else { 538be71530aSBart Van Assche cmd->se_lun = xop->xop_se_cmd->se_lun; 539be71530aSBart Van Assche cmd->se_dev = xop->xop_se_cmd->se_dev; 540be71530aSBart Van Assche } 541be71530aSBart Van Assche cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 542cbf031f4SNicholas Bellinger 54308694199SMike Christie if (target_cmd_init_cdb(cmd, cdb, GFP_KERNEL)) 5449e95fb80SSudhakar Panneerselvam return -EINVAL; 5459e95fb80SSudhakar Panneerselvam 546649ee054SBart Van Assche cmd->tag = 0; 547987db587SSudhakar Panneerselvam if (target_cmd_parse_cdb(cmd)) 5480ad08996SDavid Disseldorp return -EINVAL; 549cbf031f4SNicholas Bellinger 5500ad08996SDavid Disseldorp if (transport_generic_map_mem_to_cmd(cmd, xop->xop_data_sg, 5510ad08996SDavid Disseldorp xop->xop_data_nents, NULL, 0)) 5520ad08996SDavid Disseldorp return -EINVAL; 553cbf031f4SNicholas Bellinger 554cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 555cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 556cbf031f4SNicholas Bellinger 557cbf031f4SNicholas Bellinger return 0; 558cbf031f4SNicholas Bellinger } 559cbf031f4SNicholas Bellinger 560cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 561cbf031f4SNicholas Bellinger { 562cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 563cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 564cbf031f4SNicholas Bellinger 565cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 566cbf031f4SNicholas Bellinger if (sense_rc) 567cbf031f4SNicholas Bellinger return -EINVAL; 568cbf031f4SNicholas Bellinger 569cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 570cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 571cbf031f4SNicholas Bellinger 572cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 573cbf031f4SNicholas Bellinger 574cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 575cbf031f4SNicholas Bellinger se_cmd->scsi_status); 5768a955d6dSNicholas Bellinger 5778a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 578cbf031f4SNicholas Bellinger } 579cbf031f4SNicholas Bellinger 580cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 581cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 582cbf031f4SNicholas Bellinger struct xcopy_op *xop, 583cbf031f4SNicholas Bellinger struct se_device *src_dev, 584cbf031f4SNicholas Bellinger sector_t src_lba, 585cbf031f4SNicholas Bellinger u32 src_sectors) 586cbf031f4SNicholas Bellinger { 587b92fcfcbSDavid Disseldorp struct xcopy_pt_cmd xpt_cmd; 588b92fcfcbSDavid Disseldorp struct se_cmd *se_cmd = &xpt_cmd.se_cmd; 589cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 590cbf031f4SNicholas Bellinger int rc; 591cbf031f4SNicholas Bellinger unsigned char cdb[16]; 592cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 593cbf031f4SNicholas Bellinger 594b92fcfcbSDavid Disseldorp memset(&xpt_cmd, 0, sizeof(xpt_cmd)); 595b92fcfcbSDavid Disseldorp init_completion(&xpt_cmd.xpt_passthrough_sem); 596cbf031f4SNicholas Bellinger 597cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 598cbf031f4SNicholas Bellinger cdb[0] = READ_16; 599cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 600cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 601cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 602cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 603cbf031f4SNicholas Bellinger 604a78b7136SMike Christie __target_init_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 605a36840d8SSudhakar Panneerselvam DMA_FROM_DEVICE, 0, &xpt_cmd.sense_buffer[0], 0); 606cbf031f4SNicholas Bellinger 607b92fcfcbSDavid Disseldorp rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, src_dev, &cdb[0], 6080ad08996SDavid Disseldorp remote_port); 609cbf031f4SNicholas Bellinger if (rc < 0) { 610b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 611b92fcfcbSDavid Disseldorp goto out; 612cbf031f4SNicholas Bellinger } 613cbf031f4SNicholas Bellinger 614cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 615cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 616cbf031f4SNicholas Bellinger 617b92fcfcbSDavid Disseldorp rc = target_xcopy_issue_pt_cmd(&xpt_cmd); 618b92fcfcbSDavid Disseldorp if (rc < 0) 619b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 620b92fcfcbSDavid Disseldorp out: 621cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 622cbf031f4SNicholas Bellinger return rc; 623cbf031f4SNicholas Bellinger } 624cbf031f4SNicholas Bellinger 625cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 626cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 627cbf031f4SNicholas Bellinger struct xcopy_op *xop, 628cbf031f4SNicholas Bellinger struct se_device *dst_dev, 629cbf031f4SNicholas Bellinger sector_t dst_lba, 630cbf031f4SNicholas Bellinger u32 dst_sectors) 631cbf031f4SNicholas Bellinger { 632b92fcfcbSDavid Disseldorp struct xcopy_pt_cmd xpt_cmd; 633b92fcfcbSDavid Disseldorp struct se_cmd *se_cmd = &xpt_cmd.se_cmd; 634cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 635cbf031f4SNicholas Bellinger int rc; 636cbf031f4SNicholas Bellinger unsigned char cdb[16]; 637cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 638cbf031f4SNicholas Bellinger 639b92fcfcbSDavid Disseldorp memset(&xpt_cmd, 0, sizeof(xpt_cmd)); 640b92fcfcbSDavid Disseldorp init_completion(&xpt_cmd.xpt_passthrough_sem); 641cbf031f4SNicholas Bellinger 642cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 643cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 644cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 645cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 646cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 647cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 648cbf031f4SNicholas Bellinger 649a78b7136SMike Christie __target_init_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 650a36840d8SSudhakar Panneerselvam DMA_TO_DEVICE, 0, &xpt_cmd.sense_buffer[0], 0); 651cbf031f4SNicholas Bellinger 652b92fcfcbSDavid Disseldorp rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, dst_dev, &cdb[0], 6530ad08996SDavid Disseldorp remote_port); 654cbf031f4SNicholas Bellinger if (rc < 0) { 655b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 656b92fcfcbSDavid Disseldorp goto out; 657cbf031f4SNicholas Bellinger } 658cbf031f4SNicholas Bellinger 659b92fcfcbSDavid Disseldorp rc = target_xcopy_issue_pt_cmd(&xpt_cmd); 660b92fcfcbSDavid Disseldorp if (rc < 0) 661b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 662b92fcfcbSDavid Disseldorp out: 663cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 664cbf031f4SNicholas Bellinger return rc; 665cbf031f4SNicholas Bellinger } 666cbf031f4SNicholas Bellinger 667cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 668cbf031f4SNicholas Bellinger { 669cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 670cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 671d877d727SBart Van Assche struct se_device *src_dev, *dst_dev; 672d877d727SBart Van Assche sector_t src_lba, dst_lba, end_lba; 673cbf031f4SNicholas Bellinger unsigned int max_sectors; 674d877d727SBart Van Assche int rc = 0; 6750ad08996SDavid Disseldorp unsigned short nolb, max_nolb, copied_nolb = 0; 6760394b504SSergey Samoylenko sense_reason_t sense_rc; 677cbf031f4SNicholas Bellinger 6780394b504SSergey Samoylenko sense_rc = target_parse_xcopy_cmd(xop); 6790394b504SSergey Samoylenko if (sense_rc != TCM_NO_SENSE) 680d877d727SBart Van Assche goto err_free; 681d877d727SBart Van Assche 6820394b504SSergey Samoylenko if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev)) { 6830394b504SSergey Samoylenko sense_rc = TCM_INVALID_PARAMETER_LIST; 684d877d727SBart Van Assche goto err_free; 6850394b504SSergey Samoylenko } 686d877d727SBart Van Assche 687d877d727SBart Van Assche src_dev = xop->src_dev; 688d877d727SBart Van Assche dst_dev = xop->dst_dev; 689d877d727SBart Van Assche src_lba = xop->src_lba; 690d877d727SBart Van Assche dst_lba = xop->dst_lba; 691d877d727SBart Van Assche nolb = xop->nolb; 692cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 693cbf031f4SNicholas Bellinger /* 694cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 695cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 696cbf031f4SNicholas Bellinger */ 697cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 698cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 699cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 700cbf031f4SNicholas Bellinger 701cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 702cbf031f4SNicholas Bellinger 703cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 704cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 705cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 706cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 707cbf031f4SNicholas Bellinger 708cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 7090ad08996SDavid Disseldorp unsigned short cur_nolb = min(nolb, max_nolb); 7100ad08996SDavid Disseldorp u32 cur_bytes = cur_nolb * src_dev->dev_attrib.block_size; 7110ad08996SDavid Disseldorp 7120ad08996SDavid Disseldorp if (cur_bytes != xop->xop_data_bytes) { 7130ad08996SDavid Disseldorp /* 7140ad08996SDavid Disseldorp * (Re)allocate a buffer large enough to hold the XCOPY 7150ad08996SDavid Disseldorp * I/O size, which can be reused each read / write loop. 7160ad08996SDavid Disseldorp */ 7170ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 7180ad08996SDavid Disseldorp rc = target_alloc_sgl(&xop->xop_data_sg, 7190ad08996SDavid Disseldorp &xop->xop_data_nents, 7200ad08996SDavid Disseldorp cur_bytes, 7210ad08996SDavid Disseldorp false, false); 7220ad08996SDavid Disseldorp if (rc < 0) 7230ad08996SDavid Disseldorp goto out; 7240ad08996SDavid Disseldorp xop->xop_data_bytes = cur_bytes; 7250ad08996SDavid Disseldorp } 726cbf031f4SNicholas Bellinger 727cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 728cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 729cbf031f4SNicholas Bellinger 730cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 731cbf031f4SNicholas Bellinger if (rc < 0) 732cbf031f4SNicholas Bellinger goto out; 733cbf031f4SNicholas Bellinger 734cbf031f4SNicholas Bellinger src_lba += cur_nolb; 735cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 736cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 737cbf031f4SNicholas Bellinger 738cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 739cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 740cbf031f4SNicholas Bellinger 741cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 742cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 743b92fcfcbSDavid Disseldorp if (rc < 0) 744cbf031f4SNicholas Bellinger goto out; 745cbf031f4SNicholas Bellinger 746cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 747cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 748cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 749cbf031f4SNicholas Bellinger 750cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 751cbf031f4SNicholas Bellinger nolb -= cur_nolb; 752cbf031f4SNicholas Bellinger } 753cbf031f4SNicholas Bellinger 754cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 7550ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 756cbf031f4SNicholas Bellinger kfree(xop); 757cbf031f4SNicholas Bellinger 758cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 759cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 760cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 761cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 762cbf031f4SNicholas Bellinger 763cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 764cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 765cbf031f4SNicholas Bellinger return; 766cbf031f4SNicholas Bellinger 767cbf031f4SNicholas Bellinger out: 7680394b504SSergey Samoylenko /* 7690394b504SSergey Samoylenko * The XCOPY command was aborted after some data was transferred. 7700394b504SSergey Samoylenko * Terminate command with CHECK CONDITION status, with the sense key 7710394b504SSergey Samoylenko * set to COPY ABORTED. 7720394b504SSergey Samoylenko */ 7730394b504SSergey Samoylenko sense_rc = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; 774cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 7750ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 776d877d727SBart Van Assche 777d877d727SBart Van Assche err_free: 778cbf031f4SNicholas Bellinger kfree(xop); 7790394b504SSergey Samoylenko pr_warn_ratelimited("target_xcopy_do_work: rc: %d, sense: %u, XCOPY operation failed\n", 7800394b504SSergey Samoylenko rc, sense_rc); 7810394b504SSergey Samoylenko target_complete_cmd_with_sense(ec_cmd, SAM_STAT_CHECK_CONDITION, sense_rc); 782cbf031f4SNicholas Bellinger } 783cbf031f4SNicholas Bellinger 784d877d727SBart Van Assche /* 785d877d727SBart Van Assche * Returns TCM_NO_SENSE upon success or a sense code != TCM_NO_SENSE if parsing 786d877d727SBart Van Assche * fails. 787d877d727SBart Van Assche */ 788d877d727SBart Van Assche static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop) 789cbf031f4SNicholas Bellinger { 790d877d727SBart Van Assche struct se_cmd *se_cmd = xop->xop_se_cmd; 791cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 792d877d727SBart Van Assche unsigned int list_id, list_id_usage, sdll, inline_dl; 79348502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 794cbf031f4SNicholas Bellinger int rc; 795cbf031f4SNicholas Bellinger unsigned short tdll; 796cbf031f4SNicholas Bellinger 797cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 798cbf031f4SNicholas Bellinger if (!p) { 799cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 800cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 801cbf031f4SNicholas Bellinger } 802cbf031f4SNicholas Bellinger 803cbf031f4SNicholas Bellinger list_id = p[0]; 8043f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8053f7a46c6SNicholas Bellinger 806cbf031f4SNicholas Bellinger /* 807cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 808cbf031f4SNicholas Bellinger */ 809cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 810cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 8117d387066SDavid Disseldorp if (tdll + sdll > RCR_OP_MAX_DESC_LIST_LEN) { 8127d387066SDavid Disseldorp pr_err("XCOPY descriptor list length %u exceeds maximum %u\n", 8137d387066SDavid Disseldorp tdll + sdll, RCR_OP_MAX_DESC_LIST_LEN); 8147d387066SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 8157d387066SDavid Disseldorp goto out; 8167d387066SDavid Disseldorp } 817cbf031f4SNicholas Bellinger 818cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 819cbf031f4SNicholas Bellinger if (inline_dl != 0) { 820cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 821cbf031f4SNicholas Bellinger goto out; 822cbf031f4SNicholas Bellinger } 823cbf031f4SNicholas Bellinger 824f94fd098SDavid Disseldorp if (se_cmd->data_length < (XCOPY_HDR_LEN + tdll + sdll + inline_dl)) { 825f94fd098SDavid Disseldorp pr_err("XCOPY parameter truncation: data length %u too small " 826f94fd098SDavid Disseldorp "for tdll: %hu sdll: %u inline_dl: %u\n", 827f94fd098SDavid Disseldorp se_cmd->data_length, tdll, sdll, inline_dl); 828f94fd098SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 829f94fd098SDavid Disseldorp goto out; 830f94fd098SDavid Disseldorp } 831f94fd098SDavid Disseldorp 832cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 833cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 834cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 835cbf031f4SNicholas Bellinger 83666640d35SDavid Disseldorp /* 83766640d35SDavid Disseldorp * skip over the target descriptors until segment descriptors 83866640d35SDavid Disseldorp * have been passed - CSCD ids are needed to determine src and dest. 83966640d35SDavid Disseldorp */ 84066640d35SDavid Disseldorp seg_desc = &p[16] + tdll; 84166640d35SDavid Disseldorp 8427e642ca0SLi Feng rc = target_xcopy_parse_segment_descriptors(xop, seg_desc, sdll, &ret); 84366640d35SDavid Disseldorp if (rc <= 0) 84466640d35SDavid Disseldorp goto out; 84566640d35SDavid Disseldorp 84666640d35SDavid Disseldorp pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 84766640d35SDavid Disseldorp rc * XCOPY_SEGMENT_DESC_LEN); 84866640d35SDavid Disseldorp 849449a1378SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll, &ret); 850cbf031f4SNicholas Bellinger if (rc <= 0) 851cbf031f4SNicholas Bellinger goto out; 852cbf031f4SNicholas Bellinger 85348502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 85448502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 85548502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 85648502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 85748502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 85848502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 85948502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 86048502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 86148502ddbSNicholas Bellinger goto out; 86248502ddbSNicholas Bellinger } 86348502ddbSNicholas Bellinger 864cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 865cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 866cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 867cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 868cbf031f4SNicholas Bellinger 869cbf031f4SNicholas Bellinger out: 870cbf031f4SNicholas Bellinger if (p) 871cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 87248502ddbSNicholas Bellinger return ret; 873cbf031f4SNicholas Bellinger } 874cbf031f4SNicholas Bellinger 875d877d727SBart Van Assche sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 876d877d727SBart Van Assche { 877d877d727SBart Van Assche struct se_device *dev = se_cmd->se_dev; 878d877d727SBart Van Assche struct xcopy_op *xop; 879d877d727SBart Van Assche unsigned int sa; 880d877d727SBart Van Assche 881d877d727SBart Van Assche if (!dev->dev_attrib.emulate_3pc) { 882d877d727SBart Van Assche pr_err("EXTENDED_COPY operation explicitly disabled\n"); 883d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 884d877d727SBart Van Assche } 885d877d727SBart Van Assche 886d877d727SBart Van Assche sa = se_cmd->t_task_cdb[1] & 0x1f; 887d877d727SBart Van Assche if (sa != 0x00) { 888d877d727SBart Van Assche pr_err("EXTENDED_COPY(LID4) not supported\n"); 889d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 890d877d727SBart Van Assche } 891d877d727SBart Van Assche 892d877d727SBart Van Assche if (se_cmd->data_length == 0) { 893d877d727SBart Van Assche target_complete_cmd(se_cmd, SAM_STAT_GOOD); 894d877d727SBart Van Assche return TCM_NO_SENSE; 895d877d727SBart Van Assche } 896d877d727SBart Van Assche if (se_cmd->data_length < XCOPY_HDR_LEN) { 897d877d727SBart Van Assche pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n", 898d877d727SBart Van Assche se_cmd->data_length, XCOPY_HDR_LEN); 899d877d727SBart Van Assche return TCM_PARAMETER_LIST_LENGTH_ERROR; 900d877d727SBart Van Assche } 901d877d727SBart Van Assche 902d877d727SBart Van Assche xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 903d877d727SBart Van Assche if (!xop) 904d877d727SBart Van Assche goto err; 905d877d727SBart Van Assche xop->xop_se_cmd = se_cmd; 906d877d727SBart Van Assche INIT_WORK(&xop->xop_work, target_xcopy_do_work); 907d877d727SBart Van Assche if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work))) 908d877d727SBart Van Assche goto free; 909d877d727SBart Van Assche return TCM_NO_SENSE; 910d877d727SBart Van Assche 911d877d727SBart Van Assche free: 912d877d727SBart Van Assche kfree(xop); 913d877d727SBart Van Assche 914d877d727SBart Van Assche err: 915d877d727SBart Van Assche return TCM_OUT_OF_RESOURCES; 916d877d727SBart Van Assche } 917d877d727SBart Van Assche 918cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 919cbf031f4SNicholas Bellinger { 920cbf031f4SNicholas Bellinger unsigned char *p; 921cbf031f4SNicholas Bellinger 922cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 923cbf031f4SNicholas Bellinger if (!p) { 924cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 925cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 926cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 927cbf031f4SNicholas Bellinger } 928cbf031f4SNicholas Bellinger 929cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 930cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 931cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 932cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 933cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 934cbf031f4SNicholas Bellinger } 935cbf031f4SNicholas Bellinger /* 936cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 937cbf031f4SNicholas Bellinger */ 938cbf031f4SNicholas Bellinger p[4] = 0x1; 939cbf031f4SNicholas Bellinger /* 940cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 941cbf031f4SNicholas Bellinger */ 942cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 943cbf031f4SNicholas Bellinger /* 944cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 945cbf031f4SNicholas Bellinger */ 946cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 947cbf031f4SNicholas Bellinger /* 948cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 949cbf031f4SNicholas Bellinger */ 950cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 951cbf031f4SNicholas Bellinger /* 952cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 953cbf031f4SNicholas Bellinger */ 954cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 955cbf031f4SNicholas Bellinger /* 956cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 957cbf031f4SNicholas Bellinger */ 958cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 959cbf031f4SNicholas Bellinger /* 960cbf031f4SNicholas Bellinger * HELD DATA LIMIT 961cbf031f4SNicholas Bellinger */ 962cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 963cbf031f4SNicholas Bellinger /* 964cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 965cbf031f4SNicholas Bellinger */ 966cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 967cbf031f4SNicholas Bellinger /* 968cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 969cbf031f4SNicholas Bellinger */ 970cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 971cbf031f4SNicholas Bellinger /* 972cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 973cbf031f4SNicholas Bellinger */ 974cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 975cbf031f4SNicholas Bellinger /* 976cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 977cbf031f4SNicholas Bellinger */ 978cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 979cbf031f4SNicholas Bellinger /* 980cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 981cbf031f4SNicholas Bellinger */ 982cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 983cbf031f4SNicholas Bellinger /* 984cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 985cbf031f4SNicholas Bellinger */ 986cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 987cbf031f4SNicholas Bellinger /* 988cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 989cbf031f4SNicholas Bellinger */ 990cbf031f4SNicholas Bellinger p[43] = 0x2; 991cbf031f4SNicholas Bellinger /* 992cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 993cbf031f4SNicholas Bellinger */ 994cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 995cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 996cbf031f4SNicholas Bellinger 997cbf031f4SNicholas Bellinger /* 998cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 999cbf031f4SNicholas Bellinger */ 1000cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1001cbf031f4SNicholas Bellinger 1002cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 100314b40c1eSHannes Reinecke target_complete_cmd(se_cmd, SAM_STAT_GOOD); 1004cbf031f4SNicholas Bellinger 1005cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1006cbf031f4SNicholas Bellinger } 1007cbf031f4SNicholas Bellinger 1008cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1009cbf031f4SNicholas Bellinger { 1010cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1011cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1012cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1013cbf031f4SNicholas Bellinger 1014cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1015cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1016cbf031f4SNicholas Bellinger 1017cbf031f4SNicholas Bellinger if (list_id != 0) { 1018cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1019cbf031f4SNicholas Bellinger " not supported\n"); 1020cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1021cbf031f4SNicholas Bellinger } 1022cbf031f4SNicholas Bellinger 1023cbf031f4SNicholas Bellinger switch (sa) { 1024cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1025cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1026cbf031f4SNicholas Bellinger break; 1027cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1028cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1029cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1030cbf031f4SNicholas Bellinger default: 1031cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1032cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1033cbf031f4SNicholas Bellinger } 1034cbf031f4SNicholas Bellinger 1035cbf031f4SNicholas Bellinger return rc; 1036cbf031f4SNicholas Bellinger } 1037