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 492896c938SDavid Disseldorp /** 502896c938SDavid Disseldorp * target_xcopy_locate_se_dev_e4_iter - compare XCOPY NAA device identifiers 512896c938SDavid Disseldorp * 522896c938SDavid Disseldorp * @se_dev: device being considered for match 532896c938SDavid Disseldorp * @dev_wwn: XCOPY requested NAA dev_wwn 542896c938SDavid Disseldorp * @return: 1 on match, 0 on no-match 552896c938SDavid Disseldorp */ 566906d008SMike Christie static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, 572896c938SDavid Disseldorp const unsigned char *dev_wwn) 58cbf031f4SNicholas Bellinger { 5994aae4caSDavid Disseldorp unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; 60cbf031f4SNicholas Bellinger int rc; 61cbf031f4SNicholas Bellinger 622896c938SDavid Disseldorp if (!se_dev->dev_attrib.emulate_3pc) { 632896c938SDavid Disseldorp pr_debug("XCOPY: emulate_3pc disabled on se_dev %p\n", se_dev); 646906d008SMike Christie return 0; 652896c938SDavid Disseldorp } 66acb3f260SNicholas Bellinger 67cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 68cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 69cbf031f4SNicholas Bellinger 702896c938SDavid Disseldorp rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 712896c938SDavid Disseldorp if (rc != 0) { 722896c938SDavid Disseldorp pr_debug("XCOPY: skip non-matching: %*ph\n", 732896c938SDavid Disseldorp XCOPY_NAA_IEEE_REGEX_LEN, tmp_dev_wwn); 746906d008SMike Christie return 0; 752896c938SDavid Disseldorp } 7694aae4caSDavid Disseldorp pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); 77cbf031f4SNicholas Bellinger 786906d008SMike Christie return 1; 79cbf031f4SNicholas Bellinger } 80cbf031f4SNicholas Bellinger 812896c938SDavid Disseldorp static int target_xcopy_locate_se_dev_e4(struct se_session *sess, 822896c938SDavid Disseldorp const unsigned char *dev_wwn, 832896c938SDavid Disseldorp struct se_device **_found_dev, 842896c938SDavid Disseldorp struct percpu_ref **_found_lun_ref) 856906d008SMike Christie { 862896c938SDavid Disseldorp struct se_dev_entry *deve; 872896c938SDavid Disseldorp struct se_node_acl *nacl; 882896c938SDavid Disseldorp struct se_lun *this_lun = NULL; 892896c938SDavid Disseldorp struct se_device *found_dev = NULL; 906906d008SMike Christie 912896c938SDavid Disseldorp /* cmd with NULL sess indicates no associated $FABRIC_MOD */ 922896c938SDavid Disseldorp if (!sess) 932896c938SDavid Disseldorp goto err_out; 946906d008SMike Christie 952896c938SDavid Disseldorp pr_debug("XCOPY 0xe4: searching for: %*ph\n", 962896c938SDavid Disseldorp XCOPY_NAA_IEEE_REGEX_LEN, dev_wwn); 972896c938SDavid Disseldorp 982896c938SDavid Disseldorp nacl = sess->se_node_acl; 992896c938SDavid Disseldorp rcu_read_lock(); 1002896c938SDavid Disseldorp hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 1012896c938SDavid Disseldorp struct se_device *this_dev; 1022896c938SDavid Disseldorp int rc; 1032896c938SDavid Disseldorp 1042896c938SDavid Disseldorp this_lun = rcu_dereference(deve->se_lun); 1052896c938SDavid Disseldorp this_dev = rcu_dereference_raw(this_lun->lun_se_dev); 1062896c938SDavid Disseldorp 1072896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4_iter(this_dev, dev_wwn); 1082896c938SDavid Disseldorp if (rc) { 1092896c938SDavid Disseldorp if (percpu_ref_tryget_live(&this_lun->lun_ref)) 1102896c938SDavid Disseldorp found_dev = this_dev; 1112896c938SDavid Disseldorp break; 1122896c938SDavid Disseldorp } 1132896c938SDavid Disseldorp } 1142896c938SDavid Disseldorp rcu_read_unlock(); 1152896c938SDavid Disseldorp if (found_dev == NULL) 1162896c938SDavid Disseldorp goto err_out; 1172896c938SDavid Disseldorp 1182896c938SDavid Disseldorp pr_debug("lun_ref held for se_dev: %p se_dev->se_dev_group: %p\n", 1192896c938SDavid Disseldorp found_dev, &found_dev->dev_group); 1202896c938SDavid Disseldorp *_found_dev = found_dev; 1212896c938SDavid Disseldorp *_found_lun_ref = &this_lun->lun_ref; 1226906d008SMike Christie return 0; 1232896c938SDavid Disseldorp err_out: 124449a1378SNicholas Bellinger pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 125cbf031f4SNicholas Bellinger return -EINVAL; 126cbf031f4SNicholas Bellinger } 127cbf031f4SNicholas Bellinger 128cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 12966640d35SDavid Disseldorp unsigned char *p, unsigned short cscd_index) 130cbf031f4SNicholas Bellinger { 131cbf031f4SNicholas Bellinger unsigned char *desc = p; 132cbf031f4SNicholas Bellinger unsigned short ript; 133cbf031f4SNicholas Bellinger u8 desig_len; 134cbf031f4SNicholas Bellinger /* 135cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 136cbf031f4SNicholas Bellinger */ 137cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 138cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 139cbf031f4SNicholas Bellinger /* 140cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 141cbf031f4SNicholas Bellinger */ 142cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 143cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 144cbf031f4SNicholas Bellinger return -EINVAL; 145cbf031f4SNicholas Bellinger } 146cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 147cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 148cbf031f4SNicholas Bellinger return -EINVAL; 149cbf031f4SNicholas Bellinger } 150cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 151cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 152cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 153cbf031f4SNicholas Bellinger return -EINVAL; 154cbf031f4SNicholas Bellinger } 155cbf031f4SNicholas Bellinger /* 156cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 157cbf031f4SNicholas Bellinger * Assigned designator 158cbf031f4SNicholas Bellinger */ 159cbf031f4SNicholas Bellinger desig_len = desc[7]; 16095b1b51eSDavid Disseldorp if (desig_len != XCOPY_NAA_IEEE_REGEX_LEN) { 161cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 162cbf031f4SNicholas Bellinger return -EINVAL; 163cbf031f4SNicholas Bellinger } 164cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 165cbf031f4SNicholas Bellinger /* 166cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 167cbf031f4SNicholas Bellinger */ 168cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 169cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 170cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 171cbf031f4SNicholas Bellinger return -EINVAL; 172cbf031f4SNicholas Bellinger } 173cbf031f4SNicholas Bellinger 17466640d35SDavid Disseldorp if (cscd_index != xop->stdi && cscd_index != xop->dtdi) { 17566640d35SDavid Disseldorp pr_debug("XCOPY 0xe4: ignoring CSCD entry %d - neither src nor " 17666640d35SDavid Disseldorp "dest\n", cscd_index); 17766640d35SDavid Disseldorp return 0; 17866640d35SDavid Disseldorp } 17966640d35SDavid Disseldorp 18066640d35SDavid Disseldorp if (cscd_index == xop->stdi) { 181cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 182cbf031f4SNicholas Bellinger /* 183cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 184cbf031f4SNicholas Bellinger */ 185cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 186cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 187cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 188cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 189cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 190cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 191cbf031f4SNicholas Bellinger } 19266640d35SDavid Disseldorp } 19366640d35SDavid Disseldorp 19466640d35SDavid Disseldorp if (cscd_index == xop->dtdi) { 195cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 196cbf031f4SNicholas Bellinger /* 19766640d35SDavid Disseldorp * Determine if the destination designator matches the local 19866640d35SDavid Disseldorp * device. If @cscd_index corresponds to both source (stdi) and 19966640d35SDavid Disseldorp * destination (dtdi), or dtdi comes after stdi, then 20066640d35SDavid Disseldorp * XCOL_DEST_RECV_OP wins. 201cbf031f4SNicholas Bellinger */ 202cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 203cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 204cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 205cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 206cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 207cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 208cbf031f4SNicholas Bellinger } 209cbf031f4SNicholas Bellinger } 210cbf031f4SNicholas Bellinger 211cbf031f4SNicholas Bellinger return 0; 212cbf031f4SNicholas Bellinger } 213cbf031f4SNicholas Bellinger 214cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 215cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 216449a1378SNicholas Bellinger unsigned short tdll, sense_reason_t *sense_ret) 217cbf031f4SNicholas Bellinger { 218cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 219cbf031f4SNicholas Bellinger unsigned char *desc = p; 22066640d35SDavid Disseldorp int offset = tdll % XCOPY_TARGET_DESC_LEN, rc; 22166640d35SDavid Disseldorp unsigned short cscd_index = 0; 222cbf031f4SNicholas Bellinger unsigned short start = 0; 223cbf031f4SNicholas Bellinger 224449a1378SNicholas Bellinger *sense_ret = TCM_INVALID_PARAMETER_LIST; 225449a1378SNicholas Bellinger 226cbf031f4SNicholas Bellinger if (offset != 0) { 227cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 228cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 229c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 230cbf031f4SNicholas Bellinger return -EINVAL; 231cbf031f4SNicholas Bellinger } 23261c35919SDavid Disseldorp if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) { 233cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 234cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 23561c35919SDavid Disseldorp /* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */ 23661c35919SDavid Disseldorp *sense_ret = TCM_TOO_MANY_TARGET_DESCS; 237cbf031f4SNicholas Bellinger return -EINVAL; 238cbf031f4SNicholas Bellinger } 239cbf031f4SNicholas Bellinger /* 240cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 241cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 242cbf031f4SNicholas Bellinger */ 243cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 244cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 245cbf031f4SNicholas Bellinger 246cbf031f4SNicholas Bellinger while (start < tdll) { 247cbf031f4SNicholas Bellinger /* 24866640d35SDavid Disseldorp * Check target descriptor identification with 0xE4 type, and 24966640d35SDavid Disseldorp * compare the current index with the CSCD descriptor IDs in 25066640d35SDavid Disseldorp * the segment descriptor. Use VPD 0x83 WWPN matching .. 251cbf031f4SNicholas Bellinger */ 252cbf031f4SNicholas Bellinger switch (desc[0]) { 253cbf031f4SNicholas Bellinger case 0xe4: 254cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 25566640d35SDavid Disseldorp &desc[0], cscd_index); 256cbf031f4SNicholas Bellinger if (rc != 0) 257cbf031f4SNicholas Bellinger goto out; 258cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 259cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 26066640d35SDavid Disseldorp cscd_index++; 261cbf031f4SNicholas Bellinger break; 262cbf031f4SNicholas Bellinger default: 263cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 264cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 265c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE; 266cbf031f4SNicholas Bellinger goto out; 267cbf031f4SNicholas Bellinger } 268cbf031f4SNicholas Bellinger } 269cbf031f4SNicholas Bellinger 27066640d35SDavid Disseldorp switch (xop->op_origin) { 27166640d35SDavid Disseldorp case XCOL_SOURCE_RECV_OP: 2722896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, 2732896c938SDavid Disseldorp xop->dst_tid_wwn, 2742896c938SDavid Disseldorp &xop->dst_dev, 2752896c938SDavid Disseldorp &xop->remote_lun_ref); 27666640d35SDavid Disseldorp break; 27766640d35SDavid Disseldorp case XCOL_DEST_RECV_OP: 2782896c938SDavid Disseldorp rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, 2792896c938SDavid Disseldorp xop->src_tid_wwn, 2802896c938SDavid Disseldorp &xop->src_dev, 2812896c938SDavid Disseldorp &xop->remote_lun_ref); 28266640d35SDavid Disseldorp break; 28366640d35SDavid Disseldorp default: 28466640d35SDavid Disseldorp pr_err("XCOPY CSCD descriptor IDs not found in CSCD list - " 28566640d35SDavid Disseldorp "stdi: %hu dtdi: %hu\n", xop->stdi, xop->dtdi); 28666640d35SDavid Disseldorp rc = -EINVAL; 28766640d35SDavid Disseldorp break; 28866640d35SDavid Disseldorp } 289449a1378SNicholas Bellinger /* 290449a1378SNicholas Bellinger * If a matching IEEE NAA 0x83 descriptor for the requested device 291449a1378SNicholas Bellinger * is not located on this node, return COPY_ABORTED with ASQ/ASQC 292449a1378SNicholas Bellinger * 0x0d/0x02 - COPY_TARGET_DEVICE_NOT_REACHABLE to request the 293449a1378SNicholas Bellinger * initiator to fall back to normal copy method. 294449a1378SNicholas Bellinger */ 295449a1378SNicholas Bellinger if (rc < 0) { 296449a1378SNicholas Bellinger *sense_ret = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; 297cbf031f4SNicholas Bellinger goto out; 298449a1378SNicholas Bellinger } 299cbf031f4SNicholas Bellinger 300cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 301cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 302cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 303cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 304cbf031f4SNicholas Bellinger 30566640d35SDavid Disseldorp return cscd_index; 306cbf031f4SNicholas Bellinger 307cbf031f4SNicholas Bellinger out: 308cbf031f4SNicholas Bellinger return -EINVAL; 309cbf031f4SNicholas Bellinger } 310cbf031f4SNicholas Bellinger 311cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 312cbf031f4SNicholas Bellinger unsigned char *p) 313cbf031f4SNicholas Bellinger { 314cbf031f4SNicholas Bellinger unsigned char *desc = p; 315cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 316cbf031f4SNicholas Bellinger unsigned short desc_len; 317cbf031f4SNicholas Bellinger 318cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 319cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 320cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 321cbf031f4SNicholas Bellinger " %hu\n", desc_len); 322cbf031f4SNicholas Bellinger return -EINVAL; 323cbf031f4SNicholas Bellinger } 324cbf031f4SNicholas Bellinger 325cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 326cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 327f184210bSDavid Disseldorp 328f184210bSDavid Disseldorp if (xop->stdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX || 329f184210bSDavid Disseldorp xop->dtdi > XCOPY_CSCD_DESC_ID_LIST_OFF_MAX) { 330f184210bSDavid Disseldorp pr_err("XCOPY segment desc 0x02: unsupported CSCD ID > 0x%x; stdi: %hu dtdi: %hu\n", 331f184210bSDavid Disseldorp XCOPY_CSCD_DESC_ID_LIST_OFF_MAX, xop->stdi, xop->dtdi); 332f184210bSDavid Disseldorp return -EINVAL; 333f184210bSDavid Disseldorp } 334f184210bSDavid Disseldorp 335cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 336cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 337cbf031f4SNicholas Bellinger 338cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 339cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 340cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 341cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 342cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 343cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 344cbf031f4SNicholas Bellinger 345cbf031f4SNicholas Bellinger return 0; 346cbf031f4SNicholas Bellinger } 347cbf031f4SNicholas Bellinger 348cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 349cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 350af9f62c1SDavid Disseldorp unsigned int sdll, sense_reason_t *sense_ret) 351cbf031f4SNicholas Bellinger { 352cbf031f4SNicholas Bellinger unsigned char *desc = p; 353cbf031f4SNicholas Bellinger unsigned int start = 0; 354cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 355cbf031f4SNicholas Bellinger 356af9f62c1SDavid Disseldorp *sense_ret = TCM_INVALID_PARAMETER_LIST; 357af9f62c1SDavid Disseldorp 358cbf031f4SNicholas Bellinger if (offset != 0) { 359cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 360cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 361c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 362cbf031f4SNicholas Bellinger return -EINVAL; 363cbf031f4SNicholas Bellinger } 364af9f62c1SDavid Disseldorp if (sdll > RCR_OP_MAX_SG_DESC_COUNT * XCOPY_SEGMENT_DESC_LEN) { 365af9f62c1SDavid Disseldorp pr_err("XCOPY supports %u segment descriptor(s), sdll: %u too" 366af9f62c1SDavid Disseldorp " large..\n", RCR_OP_MAX_SG_DESC_COUNT, sdll); 367af9f62c1SDavid Disseldorp /* spc4r37 6.4.3.5 SEGMENT DESCRIPTOR LIST LENGTH field */ 368af9f62c1SDavid Disseldorp *sense_ret = TCM_TOO_MANY_SEGMENT_DESCS; 369af9f62c1SDavid Disseldorp return -EINVAL; 370af9f62c1SDavid Disseldorp } 371cbf031f4SNicholas Bellinger 372cbf031f4SNicholas Bellinger while (start < sdll) { 373cbf031f4SNicholas Bellinger /* 374cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 375cbf031f4SNicholas Bellinger */ 376cbf031f4SNicholas Bellinger switch (desc[0]) { 377cbf031f4SNicholas Bellinger case 0x02: 378cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 379cbf031f4SNicholas Bellinger if (rc < 0) 380cbf031f4SNicholas Bellinger goto out; 381cbf031f4SNicholas Bellinger 382cbf031f4SNicholas Bellinger ret++; 383cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 384cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 385cbf031f4SNicholas Bellinger break; 386cbf031f4SNicholas Bellinger default: 3876774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 388cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 389c2438497SDavid Disseldorp *sense_ret = TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE; 390cbf031f4SNicholas Bellinger goto out; 391cbf031f4SNicholas Bellinger } 392cbf031f4SNicholas Bellinger } 393cbf031f4SNicholas Bellinger 394cbf031f4SNicholas Bellinger return ret; 395cbf031f4SNicholas Bellinger 396cbf031f4SNicholas Bellinger out: 397cbf031f4SNicholas Bellinger return -EINVAL; 398cbf031f4SNicholas Bellinger } 399cbf031f4SNicholas Bellinger 400cbf031f4SNicholas Bellinger /* 401cbf031f4SNicholas Bellinger * Start xcopy_pt ops 402cbf031f4SNicholas Bellinger */ 403cbf031f4SNicholas Bellinger 404cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 405cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 406cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 407366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 408cbf031f4SNicholas Bellinger }; 409cbf031f4SNicholas Bellinger 410adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 411cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 412cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 413cbf031f4SNicholas Bellinger 414cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 415cbf031f4SNicholas Bellinger { 416cbf031f4SNicholas Bellinger return 0; 417cbf031f4SNicholas Bellinger } 418cbf031f4SNicholas Bellinger 419cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 420cbf031f4SNicholas Bellinger { 421cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 4222896c938SDavid Disseldorp pr_debug("putting dst lun_ref for %p\n", xop->dst_dev); 423cbf031f4SNicholas Bellinger else 4242896c938SDavid Disseldorp pr_debug("putting src lun_ref for %p\n", xop->src_dev); 425cbf031f4SNicholas Bellinger 4262896c938SDavid Disseldorp percpu_ref_put(xop->remote_lun_ref); 427cbf031f4SNicholas Bellinger } 428cbf031f4SNicholas Bellinger 429cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 430cbf031f4SNicholas Bellinger { 431cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 432cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 433cbf031f4SNicholas Bellinger 434b92fcfcbSDavid Disseldorp /* xpt_cmd is on the stack, nothing to free here */ 435b92fcfcbSDavid Disseldorp pr_debug("xpt_cmd done: %p\n", xpt_cmd); 436cbf031f4SNicholas Bellinger } 437cbf031f4SNicholas Bellinger 438cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 439cbf031f4SNicholas Bellinger { 440cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 441cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 442cbf031f4SNicholas Bellinger 443cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 444cbf031f4SNicholas Bellinger return 0; 445cbf031f4SNicholas Bellinger } 446cbf031f4SNicholas Bellinger 447cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 448cbf031f4SNicholas Bellinger { 449cbf031f4SNicholas Bellinger return 0; 450cbf031f4SNicholas Bellinger } 451cbf031f4SNicholas Bellinger 452cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 453cbf031f4SNicholas Bellinger { 454cbf031f4SNicholas Bellinger return 0; 455cbf031f4SNicholas Bellinger } 456cbf031f4SNicholas Bellinger 457cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 458cbf031f4SNicholas Bellinger { 459cbf031f4SNicholas Bellinger return 0; 460cbf031f4SNicholas Bellinger } 461cbf031f4SNicholas Bellinger 4629ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 46330c7ca93SDavid Disseldorp .fabric_name = "xcopy-pt", 464cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 465cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 466cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 467cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 468cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 469cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 470cbf031f4SNicholas Bellinger }; 471cbf031f4SNicholas Bellinger 472cbf031f4SNicholas Bellinger /* 473cbf031f4SNicholas Bellinger * End xcopy_pt_ops 474cbf031f4SNicholas Bellinger */ 475cbf031f4SNicholas Bellinger 476cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 477cbf031f4SNicholas Bellinger { 478ad669505SBart Van Assche int ret; 479ad669505SBart Van Assche 480cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 481cbf031f4SNicholas Bellinger if (!xcopy_wq) { 482cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 483cbf031f4SNicholas Bellinger return -ENOMEM; 484cbf031f4SNicholas Bellinger } 485cbf031f4SNicholas Bellinger 486cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 487cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 488cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 489cbf031f4SNicholas Bellinger 490cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 491cbf031f4SNicholas Bellinger 492cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 493cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 494cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 495cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 496ad669505SBart Van Assche ret = transport_init_session(&xcopy_pt_sess); 497ad669505SBart Van Assche if (ret < 0) 4983c006c7dSMike Christie goto destroy_wq; 499cbf031f4SNicholas Bellinger 500cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 501cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 502cbf031f4SNicholas Bellinger 503cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 504cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 505cbf031f4SNicholas Bellinger 506cbf031f4SNicholas Bellinger return 0; 5073c006c7dSMike Christie 5083c006c7dSMike Christie destroy_wq: 5093c006c7dSMike Christie destroy_workqueue(xcopy_wq); 5103c006c7dSMike Christie xcopy_wq = NULL; 5113c006c7dSMike Christie return ret; 512cbf031f4SNicholas Bellinger } 513cbf031f4SNicholas Bellinger 514cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 515cbf031f4SNicholas Bellinger { 5163c006c7dSMike Christie if (xcopy_wq) { 517cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 5183c006c7dSMike Christie transport_uninit_session(&xcopy_pt_sess); 5193c006c7dSMike Christie } 520cbf031f4SNicholas Bellinger } 521cbf031f4SNicholas Bellinger 522be71530aSBart Van Assche /* 523be71530aSBart Van Assche * target_xcopy_setup_pt_cmd - set up a pass-through command 524be71530aSBart Van Assche * @xpt_cmd: Data structure to initialize. 525be71530aSBart Van Assche * @xop: Describes the XCOPY operation received from an initiator. 526be71530aSBart Van Assche * @se_dev: Backend device to associate with @xpt_cmd if 527be71530aSBart Van Assche * @remote_port == true. 528be71530aSBart Van Assche * @cdb: SCSI CDB to be copied into @xpt_cmd. 529be71530aSBart Van Assche * @remote_port: If false, use the LUN through which the XCOPY command has 530be71530aSBart Van Assche * been received. If true, use @se_dev->xcopy_lun. 531be71530aSBart Van Assche * 532be71530aSBart Van Assche * Set up a SCSI command (READ or WRITE) that will be used to execute an 533be71530aSBart Van Assche * XCOPY command. 534be71530aSBart Van Assche */ 535cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 536cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 537cbf031f4SNicholas Bellinger struct xcopy_op *xop, 538cbf031f4SNicholas Bellinger struct se_device *se_dev, 539cbf031f4SNicholas Bellinger unsigned char *cdb, 5400ad08996SDavid Disseldorp bool remote_port) 541cbf031f4SNicholas Bellinger { 542cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 543be71530aSBart Van Assche 544cbf031f4SNicholas Bellinger /* 545cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 546cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 547cbf031f4SNicholas Bellinger */ 548be71530aSBart Van Assche if (remote_port) { 549be71530aSBart Van Assche cmd->se_lun = &se_dev->xcopy_lun; 550be71530aSBart Van Assche cmd->se_dev = se_dev; 551be71530aSBart Van Assche } else { 552be71530aSBart Van Assche cmd->se_lun = xop->xop_se_cmd->se_lun; 553be71530aSBart Van Assche cmd->se_dev = xop->xop_se_cmd->se_dev; 554be71530aSBart Van Assche } 555be71530aSBart Van Assche cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 556cbf031f4SNicholas Bellinger 557*08694199SMike Christie if (target_cmd_init_cdb(cmd, cdb, GFP_KERNEL)) 5589e95fb80SSudhakar Panneerselvam return -EINVAL; 5599e95fb80SSudhakar Panneerselvam 560649ee054SBart Van Assche cmd->tag = 0; 561987db587SSudhakar Panneerselvam if (target_cmd_parse_cdb(cmd)) 5620ad08996SDavid Disseldorp return -EINVAL; 563cbf031f4SNicholas Bellinger 5640ad08996SDavid Disseldorp if (transport_generic_map_mem_to_cmd(cmd, xop->xop_data_sg, 5650ad08996SDavid Disseldorp xop->xop_data_nents, NULL, 0)) 5660ad08996SDavid Disseldorp return -EINVAL; 567cbf031f4SNicholas Bellinger 568cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 569cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 570cbf031f4SNicholas Bellinger 571cbf031f4SNicholas Bellinger return 0; 572cbf031f4SNicholas Bellinger } 573cbf031f4SNicholas Bellinger 574cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 575cbf031f4SNicholas Bellinger { 576cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 577cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 578cbf031f4SNicholas Bellinger 579cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 580cbf031f4SNicholas Bellinger if (sense_rc) 581cbf031f4SNicholas Bellinger return -EINVAL; 582cbf031f4SNicholas Bellinger 583cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 584cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 585cbf031f4SNicholas Bellinger 586cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 587cbf031f4SNicholas Bellinger 588cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 589cbf031f4SNicholas Bellinger se_cmd->scsi_status); 5908a955d6dSNicholas Bellinger 5918a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 592cbf031f4SNicholas Bellinger } 593cbf031f4SNicholas Bellinger 594cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 595cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 596cbf031f4SNicholas Bellinger struct xcopy_op *xop, 597cbf031f4SNicholas Bellinger struct se_device *src_dev, 598cbf031f4SNicholas Bellinger sector_t src_lba, 599cbf031f4SNicholas Bellinger u32 src_sectors) 600cbf031f4SNicholas Bellinger { 601b92fcfcbSDavid Disseldorp struct xcopy_pt_cmd xpt_cmd; 602b92fcfcbSDavid Disseldorp struct se_cmd *se_cmd = &xpt_cmd.se_cmd; 603cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 604cbf031f4SNicholas Bellinger int rc; 605cbf031f4SNicholas Bellinger unsigned char cdb[16]; 606cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 607cbf031f4SNicholas Bellinger 608b92fcfcbSDavid Disseldorp memset(&xpt_cmd, 0, sizeof(xpt_cmd)); 609b92fcfcbSDavid Disseldorp init_completion(&xpt_cmd.xpt_passthrough_sem); 610cbf031f4SNicholas Bellinger 611cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 612cbf031f4SNicholas Bellinger cdb[0] = READ_16; 613cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 614cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 615cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 616cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 617cbf031f4SNicholas Bellinger 618a78b7136SMike Christie __target_init_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 619a36840d8SSudhakar Panneerselvam DMA_FROM_DEVICE, 0, &xpt_cmd.sense_buffer[0], 0); 620cbf031f4SNicholas Bellinger 621b92fcfcbSDavid Disseldorp rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, src_dev, &cdb[0], 6220ad08996SDavid Disseldorp remote_port); 623cbf031f4SNicholas Bellinger if (rc < 0) { 624b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 625b92fcfcbSDavid Disseldorp goto out; 626cbf031f4SNicholas Bellinger } 627cbf031f4SNicholas Bellinger 628cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 629cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 630cbf031f4SNicholas Bellinger 631b92fcfcbSDavid Disseldorp rc = target_xcopy_issue_pt_cmd(&xpt_cmd); 632b92fcfcbSDavid Disseldorp if (rc < 0) 633b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 634b92fcfcbSDavid Disseldorp out: 635cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 636cbf031f4SNicholas Bellinger return rc; 637cbf031f4SNicholas Bellinger } 638cbf031f4SNicholas Bellinger 639cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 640cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 641cbf031f4SNicholas Bellinger struct xcopy_op *xop, 642cbf031f4SNicholas Bellinger struct se_device *dst_dev, 643cbf031f4SNicholas Bellinger sector_t dst_lba, 644cbf031f4SNicholas Bellinger u32 dst_sectors) 645cbf031f4SNicholas Bellinger { 646b92fcfcbSDavid Disseldorp struct xcopy_pt_cmd xpt_cmd; 647b92fcfcbSDavid Disseldorp struct se_cmd *se_cmd = &xpt_cmd.se_cmd; 648cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 649cbf031f4SNicholas Bellinger int rc; 650cbf031f4SNicholas Bellinger unsigned char cdb[16]; 651cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 652cbf031f4SNicholas Bellinger 653b92fcfcbSDavid Disseldorp memset(&xpt_cmd, 0, sizeof(xpt_cmd)); 654b92fcfcbSDavid Disseldorp init_completion(&xpt_cmd.xpt_passthrough_sem); 655cbf031f4SNicholas Bellinger 656cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 657cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 658cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 659cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 660cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 661cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 662cbf031f4SNicholas Bellinger 663a78b7136SMike Christie __target_init_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 664a36840d8SSudhakar Panneerselvam DMA_TO_DEVICE, 0, &xpt_cmd.sense_buffer[0], 0); 665cbf031f4SNicholas Bellinger 666b92fcfcbSDavid Disseldorp rc = target_xcopy_setup_pt_cmd(&xpt_cmd, xop, dst_dev, &cdb[0], 6670ad08996SDavid Disseldorp remote_port); 668cbf031f4SNicholas Bellinger if (rc < 0) { 669b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 670b92fcfcbSDavid Disseldorp goto out; 671cbf031f4SNicholas Bellinger } 672cbf031f4SNicholas Bellinger 673b92fcfcbSDavid Disseldorp rc = target_xcopy_issue_pt_cmd(&xpt_cmd); 674b92fcfcbSDavid Disseldorp if (rc < 0) 675b92fcfcbSDavid Disseldorp ec_cmd->scsi_status = se_cmd->scsi_status; 676b92fcfcbSDavid Disseldorp out: 677cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 678cbf031f4SNicholas Bellinger return rc; 679cbf031f4SNicholas Bellinger } 680cbf031f4SNicholas Bellinger 681cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 682cbf031f4SNicholas Bellinger { 683cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 684cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 685d877d727SBart Van Assche struct se_device *src_dev, *dst_dev; 686d877d727SBart Van Assche sector_t src_lba, dst_lba, end_lba; 687cbf031f4SNicholas Bellinger unsigned int max_sectors; 688d877d727SBart Van Assche int rc = 0; 6890ad08996SDavid Disseldorp unsigned short nolb, max_nolb, copied_nolb = 0; 690cbf031f4SNicholas Bellinger 691d877d727SBart Van Assche if (target_parse_xcopy_cmd(xop) != TCM_NO_SENSE) 692d877d727SBart Van Assche goto err_free; 693d877d727SBart Van Assche 694d877d727SBart Van Assche if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev)) 695d877d727SBart Van Assche goto err_free; 696d877d727SBart Van Assche 697d877d727SBart Van Assche src_dev = xop->src_dev; 698d877d727SBart Van Assche dst_dev = xop->dst_dev; 699d877d727SBart Van Assche src_lba = xop->src_lba; 700d877d727SBart Van Assche dst_lba = xop->dst_lba; 701d877d727SBart Van Assche nolb = xop->nolb; 702cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 703cbf031f4SNicholas Bellinger /* 704cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 705cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 706cbf031f4SNicholas Bellinger */ 707cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 708cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 709cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 710cbf031f4SNicholas Bellinger 711cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 712cbf031f4SNicholas Bellinger 713cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 714cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 715cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 716cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 717cbf031f4SNicholas Bellinger 718cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 7190ad08996SDavid Disseldorp unsigned short cur_nolb = min(nolb, max_nolb); 7200ad08996SDavid Disseldorp u32 cur_bytes = cur_nolb * src_dev->dev_attrib.block_size; 7210ad08996SDavid Disseldorp 7220ad08996SDavid Disseldorp if (cur_bytes != xop->xop_data_bytes) { 7230ad08996SDavid Disseldorp /* 7240ad08996SDavid Disseldorp * (Re)allocate a buffer large enough to hold the XCOPY 7250ad08996SDavid Disseldorp * I/O size, which can be reused each read / write loop. 7260ad08996SDavid Disseldorp */ 7270ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 7280ad08996SDavid Disseldorp rc = target_alloc_sgl(&xop->xop_data_sg, 7290ad08996SDavid Disseldorp &xop->xop_data_nents, 7300ad08996SDavid Disseldorp cur_bytes, 7310ad08996SDavid Disseldorp false, false); 7320ad08996SDavid Disseldorp if (rc < 0) 7330ad08996SDavid Disseldorp goto out; 7340ad08996SDavid Disseldorp xop->xop_data_bytes = cur_bytes; 7350ad08996SDavid Disseldorp } 736cbf031f4SNicholas Bellinger 737cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 738cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 739cbf031f4SNicholas Bellinger 740cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 741cbf031f4SNicholas Bellinger if (rc < 0) 742cbf031f4SNicholas Bellinger goto out; 743cbf031f4SNicholas Bellinger 744cbf031f4SNicholas Bellinger src_lba += cur_nolb; 745cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 746cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 747cbf031f4SNicholas Bellinger 748cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 749cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 750cbf031f4SNicholas Bellinger 751cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 752cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 753b92fcfcbSDavid Disseldorp if (rc < 0) 754cbf031f4SNicholas Bellinger goto out; 755cbf031f4SNicholas Bellinger 756cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 757cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 758cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 759cbf031f4SNicholas Bellinger 760cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 761cbf031f4SNicholas Bellinger nolb -= cur_nolb; 762cbf031f4SNicholas Bellinger } 763cbf031f4SNicholas Bellinger 764cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 7650ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 766cbf031f4SNicholas Bellinger kfree(xop); 767cbf031f4SNicholas Bellinger 768cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 769cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 770cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 771cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 772cbf031f4SNicholas Bellinger 773cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 774cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 775cbf031f4SNicholas Bellinger return; 776cbf031f4SNicholas Bellinger 777cbf031f4SNicholas Bellinger out: 778cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 7790ad08996SDavid Disseldorp target_free_sgl(xop->xop_data_sg, xop->xop_data_nents); 780d877d727SBart Van Assche 781d877d727SBart Van Assche err_free: 782cbf031f4SNicholas Bellinger kfree(xop); 783926317deSDinesh Israni /* 784926317deSDinesh Israni * Don't override an error scsi status if it has already been set 785926317deSDinesh Israni */ 786926317deSDinesh Israni if (ec_cmd->scsi_status == SAM_STAT_GOOD) { 787926317deSDinesh Israni pr_warn_ratelimited("target_xcopy_do_work: rc: %d, Setting X-COPY" 788926317deSDinesh Israni " CHECK_CONDITION -> sending response\n", rc); 789cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 790926317deSDinesh Israni } 7910583c261SNicholas Bellinger target_complete_cmd(ec_cmd, ec_cmd->scsi_status); 792cbf031f4SNicholas Bellinger } 793cbf031f4SNicholas Bellinger 794d877d727SBart Van Assche /* 795d877d727SBart Van Assche * Returns TCM_NO_SENSE upon success or a sense code != TCM_NO_SENSE if parsing 796d877d727SBart Van Assche * fails. 797d877d727SBart Van Assche */ 798d877d727SBart Van Assche static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop) 799cbf031f4SNicholas Bellinger { 800d877d727SBart Van Assche struct se_cmd *se_cmd = xop->xop_se_cmd; 801cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 802d877d727SBart Van Assche unsigned int list_id, list_id_usage, sdll, inline_dl; 80348502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 804cbf031f4SNicholas Bellinger int rc; 805cbf031f4SNicholas Bellinger unsigned short tdll; 806cbf031f4SNicholas Bellinger 807cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 808cbf031f4SNicholas Bellinger if (!p) { 809cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 810cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 811cbf031f4SNicholas Bellinger } 812cbf031f4SNicholas Bellinger 813cbf031f4SNicholas Bellinger list_id = p[0]; 8143f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8153f7a46c6SNicholas Bellinger 816cbf031f4SNicholas Bellinger /* 817cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 818cbf031f4SNicholas Bellinger */ 819cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 820cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 8217d387066SDavid Disseldorp if (tdll + sdll > RCR_OP_MAX_DESC_LIST_LEN) { 8227d387066SDavid Disseldorp pr_err("XCOPY descriptor list length %u exceeds maximum %u\n", 8237d387066SDavid Disseldorp tdll + sdll, RCR_OP_MAX_DESC_LIST_LEN); 8247d387066SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 8257d387066SDavid Disseldorp goto out; 8267d387066SDavid Disseldorp } 827cbf031f4SNicholas Bellinger 828cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 829cbf031f4SNicholas Bellinger if (inline_dl != 0) { 830cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 831cbf031f4SNicholas Bellinger goto out; 832cbf031f4SNicholas Bellinger } 833cbf031f4SNicholas Bellinger 834f94fd098SDavid Disseldorp if (se_cmd->data_length < (XCOPY_HDR_LEN + tdll + sdll + inline_dl)) { 835f94fd098SDavid Disseldorp pr_err("XCOPY parameter truncation: data length %u too small " 836f94fd098SDavid Disseldorp "for tdll: %hu sdll: %u inline_dl: %u\n", 837f94fd098SDavid Disseldorp se_cmd->data_length, tdll, sdll, inline_dl); 838f94fd098SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 839f94fd098SDavid Disseldorp goto out; 840f94fd098SDavid Disseldorp } 841f94fd098SDavid Disseldorp 842cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 843cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 844cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 845cbf031f4SNicholas Bellinger 84666640d35SDavid Disseldorp /* 84766640d35SDavid Disseldorp * skip over the target descriptors until segment descriptors 84866640d35SDavid Disseldorp * have been passed - CSCD ids are needed to determine src and dest. 84966640d35SDavid Disseldorp */ 85066640d35SDavid Disseldorp seg_desc = &p[16] + tdll; 85166640d35SDavid Disseldorp 85266640d35SDavid Disseldorp rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, 85366640d35SDavid Disseldorp sdll, &ret); 85466640d35SDavid Disseldorp if (rc <= 0) 85566640d35SDavid Disseldorp goto out; 85666640d35SDavid Disseldorp 85766640d35SDavid Disseldorp pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 85866640d35SDavid Disseldorp rc * XCOPY_SEGMENT_DESC_LEN); 85966640d35SDavid Disseldorp 860449a1378SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll, &ret); 861cbf031f4SNicholas Bellinger if (rc <= 0) 862cbf031f4SNicholas Bellinger goto out; 863cbf031f4SNicholas Bellinger 86448502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 86548502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 86648502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 86748502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 86848502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 86948502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 87048502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 87148502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 87248502ddbSNicholas Bellinger goto out; 87348502ddbSNicholas Bellinger } 87448502ddbSNicholas Bellinger 875cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 876cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 877cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 878cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 879cbf031f4SNicholas Bellinger 880cbf031f4SNicholas Bellinger out: 881cbf031f4SNicholas Bellinger if (p) 882cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 88348502ddbSNicholas Bellinger return ret; 884cbf031f4SNicholas Bellinger } 885cbf031f4SNicholas Bellinger 886d877d727SBart Van Assche sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 887d877d727SBart Van Assche { 888d877d727SBart Van Assche struct se_device *dev = se_cmd->se_dev; 889d877d727SBart Van Assche struct xcopy_op *xop; 890d877d727SBart Van Assche unsigned int sa; 891d877d727SBart Van Assche 892d877d727SBart Van Assche if (!dev->dev_attrib.emulate_3pc) { 893d877d727SBart Van Assche pr_err("EXTENDED_COPY operation explicitly disabled\n"); 894d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 895d877d727SBart Van Assche } 896d877d727SBart Van Assche 897d877d727SBart Van Assche sa = se_cmd->t_task_cdb[1] & 0x1f; 898d877d727SBart Van Assche if (sa != 0x00) { 899d877d727SBart Van Assche pr_err("EXTENDED_COPY(LID4) not supported\n"); 900d877d727SBart Van Assche return TCM_UNSUPPORTED_SCSI_OPCODE; 901d877d727SBart Van Assche } 902d877d727SBart Van Assche 903d877d727SBart Van Assche if (se_cmd->data_length == 0) { 904d877d727SBart Van Assche target_complete_cmd(se_cmd, SAM_STAT_GOOD); 905d877d727SBart Van Assche return TCM_NO_SENSE; 906d877d727SBart Van Assche } 907d877d727SBart Van Assche if (se_cmd->data_length < XCOPY_HDR_LEN) { 908d877d727SBart Van Assche pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n", 909d877d727SBart Van Assche se_cmd->data_length, XCOPY_HDR_LEN); 910d877d727SBart Van Assche return TCM_PARAMETER_LIST_LENGTH_ERROR; 911d877d727SBart Van Assche } 912d877d727SBart Van Assche 913d877d727SBart Van Assche xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 914d877d727SBart Van Assche if (!xop) 915d877d727SBart Van Assche goto err; 916d877d727SBart Van Assche xop->xop_se_cmd = se_cmd; 917d877d727SBart Van Assche INIT_WORK(&xop->xop_work, target_xcopy_do_work); 918d877d727SBart Van Assche if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work))) 919d877d727SBart Van Assche goto free; 920d877d727SBart Van Assche return TCM_NO_SENSE; 921d877d727SBart Van Assche 922d877d727SBart Van Assche free: 923d877d727SBart Van Assche kfree(xop); 924d877d727SBart Van Assche 925d877d727SBart Van Assche err: 926d877d727SBart Van Assche return TCM_OUT_OF_RESOURCES; 927d877d727SBart Van Assche } 928d877d727SBart Van Assche 929cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 930cbf031f4SNicholas Bellinger { 931cbf031f4SNicholas Bellinger unsigned char *p; 932cbf031f4SNicholas Bellinger 933cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 934cbf031f4SNicholas Bellinger if (!p) { 935cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 936cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 937cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 938cbf031f4SNicholas Bellinger } 939cbf031f4SNicholas Bellinger 940cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 941cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 942cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 943cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 944cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 945cbf031f4SNicholas Bellinger } 946cbf031f4SNicholas Bellinger /* 947cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 948cbf031f4SNicholas Bellinger */ 949cbf031f4SNicholas Bellinger p[4] = 0x1; 950cbf031f4SNicholas Bellinger /* 951cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 952cbf031f4SNicholas Bellinger */ 953cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 954cbf031f4SNicholas Bellinger /* 955cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 956cbf031f4SNicholas Bellinger */ 957cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 958cbf031f4SNicholas Bellinger /* 959cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 960cbf031f4SNicholas Bellinger */ 961cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 962cbf031f4SNicholas Bellinger /* 963cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 964cbf031f4SNicholas Bellinger */ 965cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 966cbf031f4SNicholas Bellinger /* 967cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 968cbf031f4SNicholas Bellinger */ 969cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 970cbf031f4SNicholas Bellinger /* 971cbf031f4SNicholas Bellinger * HELD DATA LIMIT 972cbf031f4SNicholas Bellinger */ 973cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 974cbf031f4SNicholas Bellinger /* 975cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 976cbf031f4SNicholas Bellinger */ 977cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 978cbf031f4SNicholas Bellinger /* 979cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 980cbf031f4SNicholas Bellinger */ 981cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 982cbf031f4SNicholas Bellinger /* 983cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 984cbf031f4SNicholas Bellinger */ 985cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 986cbf031f4SNicholas Bellinger /* 987cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 988cbf031f4SNicholas Bellinger */ 989cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 990cbf031f4SNicholas Bellinger /* 991cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 992cbf031f4SNicholas Bellinger */ 993cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 994cbf031f4SNicholas Bellinger /* 995cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 996cbf031f4SNicholas Bellinger */ 997cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 998cbf031f4SNicholas Bellinger /* 999cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 1000cbf031f4SNicholas Bellinger */ 1001cbf031f4SNicholas Bellinger p[43] = 0x2; 1002cbf031f4SNicholas Bellinger /* 1003cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 1004cbf031f4SNicholas Bellinger */ 1005cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 1006cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 1007cbf031f4SNicholas Bellinger 1008cbf031f4SNicholas Bellinger /* 1009cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 1010cbf031f4SNicholas Bellinger */ 1011cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1012cbf031f4SNicholas Bellinger 1013cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1014cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1015cbf031f4SNicholas Bellinger 1016cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1017cbf031f4SNicholas Bellinger } 1018cbf031f4SNicholas Bellinger 1019cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1020cbf031f4SNicholas Bellinger { 1021cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1022cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1023cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1024cbf031f4SNicholas Bellinger 1025cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1026cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1027cbf031f4SNicholas Bellinger 1028cbf031f4SNicholas Bellinger if (list_id != 0) { 1029cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1030cbf031f4SNicholas Bellinger " not supported\n"); 1031cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1032cbf031f4SNicholas Bellinger } 1033cbf031f4SNicholas Bellinger 1034cbf031f4SNicholas Bellinger switch (sa) { 1035cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1036cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1037cbf031f4SNicholas Bellinger break; 1038cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1039cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1040cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1041cbf031f4SNicholas Bellinger default: 1042cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1043cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1044cbf031f4SNicholas Bellinger } 1045cbf031f4SNicholas Bellinger 1046cbf031f4SNicholas Bellinger return rc; 1047cbf031f4SNicholas Bellinger } 1048