1cbf031f4SNicholas Bellinger /******************************************************************************* 2cbf031f4SNicholas Bellinger * Filename: target_core_xcopy.c 3cbf031f4SNicholas Bellinger * 4cbf031f4SNicholas Bellinger * This file contains support for SPC-4 Extended-Copy offload with generic 5cbf031f4SNicholas Bellinger * TCM backends. 6cbf031f4SNicholas Bellinger * 7cbf031f4SNicholas Bellinger * Copyright (c) 2011-2013 Datera, Inc. All rights reserved. 8cbf031f4SNicholas Bellinger * 9cbf031f4SNicholas Bellinger * Author: 10cbf031f4SNicholas Bellinger * Nicholas A. Bellinger <nab@daterainc.com> 11cbf031f4SNicholas Bellinger * 12cbf031f4SNicholas Bellinger * This program is free software; you can redistribute it and/or modify 13cbf031f4SNicholas Bellinger * it under the terms of the GNU General Public License as published by 14cbf031f4SNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 15cbf031f4SNicholas Bellinger * (at your option) any later version. 16cbf031f4SNicholas Bellinger * 17cbf031f4SNicholas Bellinger * This program is distributed in the hope that it will be useful, 18cbf031f4SNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 19cbf031f4SNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20cbf031f4SNicholas Bellinger * GNU General Public License for more details. 21cbf031f4SNicholas Bellinger * 22cbf031f4SNicholas Bellinger ******************************************************************************/ 23cbf031f4SNicholas Bellinger 24cbf031f4SNicholas Bellinger #include <linux/slab.h> 25cbf031f4SNicholas Bellinger #include <linux/spinlock.h> 26cbf031f4SNicholas Bellinger #include <linux/list.h> 27cbf031f4SNicholas Bellinger #include <linux/configfs.h> 288dcf07beSBart Van Assche #include <linux/ratelimit.h> 29ba929992SBart Van Assche #include <scsi/scsi_proto.h> 30cbf031f4SNicholas Bellinger #include <asm/unaligned.h> 31cbf031f4SNicholas Bellinger 32cbf031f4SNicholas Bellinger #include <target/target_core_base.h> 33cbf031f4SNicholas Bellinger #include <target/target_core_backend.h> 34cbf031f4SNicholas Bellinger #include <target/target_core_fabric.h> 35cbf031f4SNicholas Bellinger 36b13876d2SChristoph Hellwig #include "target_core_internal.h" 37cbf031f4SNicholas Bellinger #include "target_core_pr.h" 38cbf031f4SNicholas Bellinger #include "target_core_ua.h" 39cbf031f4SNicholas Bellinger #include "target_core_xcopy.h" 40cbf031f4SNicholas Bellinger 41cbf031f4SNicholas Bellinger static struct workqueue_struct *xcopy_wq = NULL; 42cbf031f4SNicholas Bellinger 43cbf031f4SNicholas Bellinger static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) 44cbf031f4SNicholas Bellinger { 45cbf031f4SNicholas Bellinger int off = 0; 46cbf031f4SNicholas Bellinger 47cbf031f4SNicholas Bellinger buf[off++] = (0x6 << 4); 48cbf031f4SNicholas Bellinger buf[off++] = 0x01; 49cbf031f4SNicholas Bellinger buf[off++] = 0x40; 50cbf031f4SNicholas Bellinger buf[off] = (0x5 << 4); 51cbf031f4SNicholas Bellinger 52cbf031f4SNicholas Bellinger spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 53cbf031f4SNicholas Bellinger return 0; 54cbf031f4SNicholas Bellinger } 55cbf031f4SNicholas Bellinger 56cbf031f4SNicholas Bellinger static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 57cbf031f4SNicholas Bellinger bool src) 58cbf031f4SNicholas Bellinger { 59cbf031f4SNicholas Bellinger struct se_device *se_dev; 60cbf031f4SNicholas Bellinger unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; 61cbf031f4SNicholas Bellinger int rc; 62cbf031f4SNicholas Bellinger 630bcc297eSChristophe Vu-Brugier if (src) 64cbf031f4SNicholas Bellinger dev_wwn = &xop->dst_tid_wwn[0]; 65cbf031f4SNicholas Bellinger else 66cbf031f4SNicholas Bellinger dev_wwn = &xop->src_tid_wwn[0]; 67cbf031f4SNicholas Bellinger 68cbf031f4SNicholas Bellinger mutex_lock(&g_device_mutex); 69cbf031f4SNicholas Bellinger list_for_each_entry(se_dev, &g_device_list, g_dev_node) { 70cbf031f4SNicholas Bellinger 71acb3f260SNicholas Bellinger if (!se_dev->dev_attrib.emulate_3pc) 72acb3f260SNicholas Bellinger continue; 73acb3f260SNicholas Bellinger 74cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 75cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 76cbf031f4SNicholas Bellinger 77cbf031f4SNicholas Bellinger rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 78cbf031f4SNicholas Bellinger if (rc != 0) 79cbf031f4SNicholas Bellinger continue; 80cbf031f4SNicholas Bellinger 810bcc297eSChristophe Vu-Brugier if (src) { 82cbf031f4SNicholas Bellinger xop->dst_dev = se_dev; 83cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" 84cbf031f4SNicholas Bellinger " se_dev\n", xop->dst_dev); 85cbf031f4SNicholas Bellinger } else { 86cbf031f4SNicholas Bellinger xop->src_dev = se_dev; 87cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" 88cbf031f4SNicholas Bellinger " se_dev\n", xop->src_dev); 89cbf031f4SNicholas Bellinger } 90cbf031f4SNicholas Bellinger 91d588cf8fSChristoph Hellwig rc = target_depend_item(&se_dev->dev_group.cg_item); 92cbf031f4SNicholas Bellinger if (rc != 0) { 93cbf031f4SNicholas Bellinger pr_err("configfs_depend_item attempt failed:" 94cbf031f4SNicholas Bellinger " %d for se_dev: %p\n", rc, se_dev); 95cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 96cbf031f4SNicholas Bellinger return rc; 97cbf031f4SNicholas Bellinger } 98cbf031f4SNicholas Bellinger 99d588cf8fSChristoph Hellwig pr_debug("Called configfs_depend_item for se_dev: %p" 100d588cf8fSChristoph Hellwig " se_dev->se_dev_group: %p\n", se_dev, 101cbf031f4SNicholas Bellinger &se_dev->dev_group); 102cbf031f4SNicholas Bellinger 103cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 104cbf031f4SNicholas Bellinger return 0; 105cbf031f4SNicholas Bellinger } 106cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 107cbf031f4SNicholas Bellinger 108449a1378SNicholas Bellinger pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 109cbf031f4SNicholas Bellinger return -EINVAL; 110cbf031f4SNicholas Bellinger } 111cbf031f4SNicholas Bellinger 112cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 113cbf031f4SNicholas Bellinger unsigned char *p, bool src) 114cbf031f4SNicholas Bellinger { 115cbf031f4SNicholas Bellinger unsigned char *desc = p; 116cbf031f4SNicholas Bellinger unsigned short ript; 117cbf031f4SNicholas Bellinger u8 desig_len; 118cbf031f4SNicholas Bellinger /* 119cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 120cbf031f4SNicholas Bellinger */ 121cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 122cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 123cbf031f4SNicholas Bellinger /* 124cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 125cbf031f4SNicholas Bellinger */ 126cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 127cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 128cbf031f4SNicholas Bellinger return -EINVAL; 129cbf031f4SNicholas Bellinger } 130cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 131cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 132cbf031f4SNicholas Bellinger return -EINVAL; 133cbf031f4SNicholas Bellinger } 134cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 135cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 136cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 137cbf031f4SNicholas Bellinger return -EINVAL; 138cbf031f4SNicholas Bellinger } 139cbf031f4SNicholas Bellinger /* 140cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 141cbf031f4SNicholas Bellinger * Assigned designator 142cbf031f4SNicholas Bellinger */ 143cbf031f4SNicholas Bellinger desig_len = desc[7]; 144cbf031f4SNicholas Bellinger if (desig_len != 16) { 145cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 146cbf031f4SNicholas Bellinger return -EINVAL; 147cbf031f4SNicholas Bellinger } 148cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 149cbf031f4SNicholas Bellinger /* 150cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 151cbf031f4SNicholas Bellinger */ 152cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 153cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 154cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 155cbf031f4SNicholas Bellinger return -EINVAL; 156cbf031f4SNicholas Bellinger } 157cbf031f4SNicholas Bellinger 1580bcc297eSChristophe Vu-Brugier if (src) { 159cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 160cbf031f4SNicholas Bellinger /* 161cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 162cbf031f4SNicholas Bellinger */ 163cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 164cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 165cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 166cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 167cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 168cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 169cbf031f4SNicholas Bellinger } 170cbf031f4SNicholas Bellinger } else { 171cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 172cbf031f4SNicholas Bellinger /* 173cbf031f4SNicholas Bellinger * Determine if the destination designator matches the local device 174cbf031f4SNicholas Bellinger */ 175cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 176cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 177cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 178cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 179cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 180cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 181cbf031f4SNicholas Bellinger } 182cbf031f4SNicholas Bellinger } 183cbf031f4SNicholas Bellinger 184cbf031f4SNicholas Bellinger return 0; 185cbf031f4SNicholas Bellinger } 186cbf031f4SNicholas Bellinger 187cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 188cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 189449a1378SNicholas Bellinger unsigned short tdll, sense_reason_t *sense_ret) 190cbf031f4SNicholas Bellinger { 191cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 192cbf031f4SNicholas Bellinger unsigned char *desc = p; 193cbf031f4SNicholas Bellinger int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; 194cbf031f4SNicholas Bellinger unsigned short start = 0; 195cbf031f4SNicholas Bellinger bool src = true; 196cbf031f4SNicholas Bellinger 197449a1378SNicholas Bellinger *sense_ret = TCM_INVALID_PARAMETER_LIST; 198449a1378SNicholas Bellinger 199cbf031f4SNicholas Bellinger if (offset != 0) { 200cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 201cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 202cbf031f4SNicholas Bellinger return -EINVAL; 203cbf031f4SNicholas Bellinger } 20461c35919SDavid Disseldorp if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) { 205cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 206cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 20761c35919SDavid Disseldorp /* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */ 20861c35919SDavid Disseldorp *sense_ret = TCM_TOO_MANY_TARGET_DESCS; 209cbf031f4SNicholas Bellinger return -EINVAL; 210cbf031f4SNicholas Bellinger } 211cbf031f4SNicholas Bellinger /* 212cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 213cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 214cbf031f4SNicholas Bellinger */ 215cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 216cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 217cbf031f4SNicholas Bellinger 218cbf031f4SNicholas Bellinger while (start < tdll) { 219cbf031f4SNicholas Bellinger /* 220cbf031f4SNicholas Bellinger * Check target descriptor identification with 0xE4 type with 221cbf031f4SNicholas Bellinger * use VPD 0x83 WWPN matching .. 222cbf031f4SNicholas Bellinger */ 223cbf031f4SNicholas Bellinger switch (desc[0]) { 224cbf031f4SNicholas Bellinger case 0xe4: 225cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 226cbf031f4SNicholas Bellinger &desc[0], src); 227cbf031f4SNicholas Bellinger if (rc != 0) 228cbf031f4SNicholas Bellinger goto out; 229cbf031f4SNicholas Bellinger /* 230cbf031f4SNicholas Bellinger * Assume target descriptors are in source -> destination order.. 231cbf031f4SNicholas Bellinger */ 2320bcc297eSChristophe Vu-Brugier if (src) 233cbf031f4SNicholas Bellinger src = false; 234cbf031f4SNicholas Bellinger else 235cbf031f4SNicholas Bellinger src = true; 236cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 237cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 238cbf031f4SNicholas Bellinger ret++; 239cbf031f4SNicholas Bellinger break; 240cbf031f4SNicholas Bellinger default: 241cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 242cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 243cbf031f4SNicholas Bellinger goto out; 244cbf031f4SNicholas Bellinger } 245cbf031f4SNicholas Bellinger } 246cbf031f4SNicholas Bellinger 247cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 248cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); 249cbf031f4SNicholas Bellinger else 250cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); 251449a1378SNicholas Bellinger /* 252449a1378SNicholas Bellinger * If a matching IEEE NAA 0x83 descriptor for the requested device 253449a1378SNicholas Bellinger * is not located on this node, return COPY_ABORTED with ASQ/ASQC 254449a1378SNicholas Bellinger * 0x0d/0x02 - COPY_TARGET_DEVICE_NOT_REACHABLE to request the 255449a1378SNicholas Bellinger * initiator to fall back to normal copy method. 256449a1378SNicholas Bellinger */ 257449a1378SNicholas Bellinger if (rc < 0) { 258449a1378SNicholas Bellinger *sense_ret = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE; 259cbf031f4SNicholas Bellinger goto out; 260449a1378SNicholas Bellinger } 261cbf031f4SNicholas Bellinger 262cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 263cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 264cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 265cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 266cbf031f4SNicholas Bellinger 267cbf031f4SNicholas Bellinger return ret; 268cbf031f4SNicholas Bellinger 269cbf031f4SNicholas Bellinger out: 270cbf031f4SNicholas Bellinger return -EINVAL; 271cbf031f4SNicholas Bellinger } 272cbf031f4SNicholas Bellinger 273cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 274cbf031f4SNicholas Bellinger unsigned char *p) 275cbf031f4SNicholas Bellinger { 276cbf031f4SNicholas Bellinger unsigned char *desc = p; 277cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 278cbf031f4SNicholas Bellinger unsigned short desc_len; 279cbf031f4SNicholas Bellinger 280cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 281cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 282cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 283cbf031f4SNicholas Bellinger " %hu\n", desc_len); 284cbf031f4SNicholas Bellinger return -EINVAL; 285cbf031f4SNicholas Bellinger } 286cbf031f4SNicholas Bellinger 287cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 288cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 289cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 290cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 291cbf031f4SNicholas Bellinger 292cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 293cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 294cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 295cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 296cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 297cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 298cbf031f4SNicholas Bellinger 299cbf031f4SNicholas Bellinger if (dc != 0) { 3003e9e01deSNicholas Bellinger xop->dbl = (desc[29] & 0xff) << 16; 3013e9e01deSNicholas Bellinger xop->dbl |= (desc[30] & 0xff) << 8; 302cbf031f4SNicholas Bellinger xop->dbl |= desc[31] & 0xff; 303cbf031f4SNicholas Bellinger 304cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 305cbf031f4SNicholas Bellinger } 306cbf031f4SNicholas Bellinger return 0; 307cbf031f4SNicholas Bellinger } 308cbf031f4SNicholas Bellinger 309cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 310cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 311af9f62c1SDavid Disseldorp unsigned int sdll, sense_reason_t *sense_ret) 312cbf031f4SNicholas Bellinger { 313cbf031f4SNicholas Bellinger unsigned char *desc = p; 314cbf031f4SNicholas Bellinger unsigned int start = 0; 315cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 316cbf031f4SNicholas Bellinger 317af9f62c1SDavid Disseldorp *sense_ret = TCM_INVALID_PARAMETER_LIST; 318af9f62c1SDavid Disseldorp 319cbf031f4SNicholas Bellinger if (offset != 0) { 320cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 321cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 322cbf031f4SNicholas Bellinger return -EINVAL; 323cbf031f4SNicholas Bellinger } 324af9f62c1SDavid Disseldorp if (sdll > RCR_OP_MAX_SG_DESC_COUNT * XCOPY_SEGMENT_DESC_LEN) { 325af9f62c1SDavid Disseldorp pr_err("XCOPY supports %u segment descriptor(s), sdll: %u too" 326af9f62c1SDavid Disseldorp " large..\n", RCR_OP_MAX_SG_DESC_COUNT, sdll); 327af9f62c1SDavid Disseldorp /* spc4r37 6.4.3.5 SEGMENT DESCRIPTOR LIST LENGTH field */ 328af9f62c1SDavid Disseldorp *sense_ret = TCM_TOO_MANY_SEGMENT_DESCS; 329af9f62c1SDavid Disseldorp return -EINVAL; 330af9f62c1SDavid Disseldorp } 331cbf031f4SNicholas Bellinger 332cbf031f4SNicholas Bellinger while (start < sdll) { 333cbf031f4SNicholas Bellinger /* 334cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 335cbf031f4SNicholas Bellinger */ 336cbf031f4SNicholas Bellinger switch (desc[0]) { 337cbf031f4SNicholas Bellinger case 0x02: 338cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 339cbf031f4SNicholas Bellinger if (rc < 0) 340cbf031f4SNicholas Bellinger goto out; 341cbf031f4SNicholas Bellinger 342cbf031f4SNicholas Bellinger ret++; 343cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 344cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 345cbf031f4SNicholas Bellinger break; 346cbf031f4SNicholas Bellinger default: 3476774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 348cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 349cbf031f4SNicholas Bellinger goto out; 350cbf031f4SNicholas Bellinger } 351cbf031f4SNicholas Bellinger } 352cbf031f4SNicholas Bellinger 353cbf031f4SNicholas Bellinger return ret; 354cbf031f4SNicholas Bellinger 355cbf031f4SNicholas Bellinger out: 356cbf031f4SNicholas Bellinger return -EINVAL; 357cbf031f4SNicholas Bellinger } 358cbf031f4SNicholas Bellinger 359cbf031f4SNicholas Bellinger /* 360cbf031f4SNicholas Bellinger * Start xcopy_pt ops 361cbf031f4SNicholas Bellinger */ 362cbf031f4SNicholas Bellinger 363cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 364cbf031f4SNicholas Bellinger bool remote_port; 365cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 366cbf031f4SNicholas Bellinger struct xcopy_op *xcopy_op; 367cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 368366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 369cbf031f4SNicholas Bellinger }; 370cbf031f4SNicholas Bellinger 371adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 372cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 373cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 374cbf031f4SNicholas Bellinger 375cbf031f4SNicholas Bellinger static char *xcopy_pt_get_fabric_name(void) 376cbf031f4SNicholas Bellinger { 377cbf031f4SNicholas Bellinger return "xcopy-pt"; 378cbf031f4SNicholas Bellinger } 379cbf031f4SNicholas Bellinger 380cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 381cbf031f4SNicholas Bellinger { 382cbf031f4SNicholas Bellinger return 0; 383cbf031f4SNicholas Bellinger } 384cbf031f4SNicholas Bellinger 385cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 386cbf031f4SNicholas Bellinger { 387cbf031f4SNicholas Bellinger struct se_device *remote_dev; 388cbf031f4SNicholas Bellinger 389cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 390cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 391cbf031f4SNicholas Bellinger else 392cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 393cbf031f4SNicholas Bellinger 394d588cf8fSChristoph Hellwig pr_debug("Calling configfs_undepend_item for" 395cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 396d588cf8fSChristoph Hellwig remote_dev, &remote_dev->dev_group.cg_item); 397cbf031f4SNicholas Bellinger 398d588cf8fSChristoph Hellwig target_undepend_item(&remote_dev->dev_group.cg_item); 399cbf031f4SNicholas Bellinger } 400cbf031f4SNicholas Bellinger 401cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 402cbf031f4SNicholas Bellinger { 403cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 404cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 405cbf031f4SNicholas Bellinger 406cbf031f4SNicholas Bellinger kfree(xpt_cmd); 407cbf031f4SNicholas Bellinger } 408cbf031f4SNicholas Bellinger 409cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 410cbf031f4SNicholas Bellinger { 411cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 412cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 413cbf031f4SNicholas Bellinger 414cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 415cbf031f4SNicholas Bellinger return 0; 416cbf031f4SNicholas Bellinger } 417cbf031f4SNicholas Bellinger 418cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 419cbf031f4SNicholas Bellinger { 420cbf031f4SNicholas Bellinger return 0; 421cbf031f4SNicholas Bellinger } 422cbf031f4SNicholas Bellinger 423cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) 424cbf031f4SNicholas Bellinger { 425cbf031f4SNicholas Bellinger return 0; 426cbf031f4SNicholas Bellinger } 427cbf031f4SNicholas Bellinger 428cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 429cbf031f4SNicholas Bellinger { 430cbf031f4SNicholas Bellinger return 0; 431cbf031f4SNicholas Bellinger } 432cbf031f4SNicholas Bellinger 433cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 434cbf031f4SNicholas Bellinger { 435cbf031f4SNicholas Bellinger return 0; 436cbf031f4SNicholas Bellinger } 437cbf031f4SNicholas Bellinger 4389ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 439cbf031f4SNicholas Bellinger .get_fabric_name = xcopy_pt_get_fabric_name, 440cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 441cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 442cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 443cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 444cbf031f4SNicholas Bellinger .write_pending_status = xcopy_pt_write_pending_status, 445cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 446cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 447cbf031f4SNicholas Bellinger }; 448cbf031f4SNicholas Bellinger 449cbf031f4SNicholas Bellinger /* 450cbf031f4SNicholas Bellinger * End xcopy_pt_ops 451cbf031f4SNicholas Bellinger */ 452cbf031f4SNicholas Bellinger 453cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 454cbf031f4SNicholas Bellinger { 455cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 456cbf031f4SNicholas Bellinger if (!xcopy_wq) { 457cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 458cbf031f4SNicholas Bellinger return -ENOMEM; 459cbf031f4SNicholas Bellinger } 460cbf031f4SNicholas Bellinger 461cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 462cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); 463cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 464cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 465cbf031f4SNicholas Bellinger 466cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 467cbf031f4SNicholas Bellinger 468cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 469cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 470cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 471cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 472cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); 473cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); 4744416f89bSNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_cmd_list); 4754416f89bSNicholas Bellinger spin_lock_init(&xcopy_pt_sess.sess_cmd_lock); 476cbf031f4SNicholas Bellinger 477cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 478cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 479cbf031f4SNicholas Bellinger 480cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 481cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 482cbf031f4SNicholas Bellinger 483cbf031f4SNicholas Bellinger return 0; 484cbf031f4SNicholas Bellinger } 485cbf031f4SNicholas Bellinger 486cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 487cbf031f4SNicholas Bellinger { 488cbf031f4SNicholas Bellinger if (xcopy_wq) 489cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 490cbf031f4SNicholas Bellinger } 491cbf031f4SNicholas Bellinger 492cbf031f4SNicholas Bellinger static void target_xcopy_setup_pt_port( 493cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 494cbf031f4SNicholas Bellinger struct xcopy_op *xop, 495cbf031f4SNicholas Bellinger bool remote_port) 496cbf031f4SNicholas Bellinger { 497cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 498cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; 499cbf031f4SNicholas Bellinger 500cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) { 501cbf031f4SNicholas Bellinger /* 502cbf031f4SNicholas Bellinger * Honor destination port reservations for X-COPY PUSH emulation 503cbf031f4SNicholas Bellinger * when CDB is received on local source port, and READs blocks to 504cbf031f4SNicholas Bellinger * WRITE on remote destination port. 505cbf031f4SNicholas Bellinger */ 506cbf031f4SNicholas Bellinger if (remote_port) { 507cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 508cbf031f4SNicholas Bellinger } else { 509cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 510cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 511cbf031f4SNicholas Bellinger 512cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_dev:" 513cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 514cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 515cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", 516cbf031f4SNicholas Bellinger pt_cmd->se_lun); 517cbf031f4SNicholas Bellinger } 518cbf031f4SNicholas Bellinger } else { 519cbf031f4SNicholas Bellinger /* 520cbf031f4SNicholas Bellinger * Honor source port reservation for X-COPY PULL emulation 521cbf031f4SNicholas Bellinger * when CDB is received on local desintation port, and READs 522cbf031f4SNicholas Bellinger * blocks from the remote source port to WRITE on local 523cbf031f4SNicholas Bellinger * destination port. 524cbf031f4SNicholas Bellinger */ 525cbf031f4SNicholas Bellinger if (remote_port) { 526cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 527cbf031f4SNicholas Bellinger } else { 528cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 529cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 530cbf031f4SNicholas Bellinger 531cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_dev:" 532cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 533cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 534cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", 535cbf031f4SNicholas Bellinger pt_cmd->se_lun); 536cbf031f4SNicholas Bellinger } 537cbf031f4SNicholas Bellinger } 538cbf031f4SNicholas Bellinger } 539cbf031f4SNicholas Bellinger 5402c336e3aSChristoph Hellwig static void target_xcopy_init_pt_lun(struct se_device *se_dev, 5412c336e3aSChristoph Hellwig struct se_cmd *pt_cmd, bool remote_port) 542cbf031f4SNicholas Bellinger { 543cbf031f4SNicholas Bellinger /* 544cbf031f4SNicholas Bellinger * Don't allocate + init an pt_cmd->se_lun if honoring local port for 545cbf031f4SNicholas Bellinger * reservations. The pt_cmd->se_lun pointer will be setup from within 546cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_port() 547cbf031f4SNicholas Bellinger */ 5482c336e3aSChristoph Hellwig if (remote_port) { 5492c336e3aSChristoph Hellwig pr_debug("Setup emulated se_dev: %p from se_dev\n", 5502c336e3aSChristoph Hellwig pt_cmd->se_dev); 5514863e525SNicholas Bellinger pt_cmd->se_lun = &se_dev->xcopy_lun; 552cbf031f4SNicholas Bellinger pt_cmd->se_dev = se_dev; 5532c336e3aSChristoph Hellwig } 554cbf031f4SNicholas Bellinger 555c3d0a7c2SChristoph Hellwig pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 556cbf031f4SNicholas Bellinger } 557cbf031f4SNicholas Bellinger 558cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 559cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 560cbf031f4SNicholas Bellinger struct xcopy_op *xop, 561cbf031f4SNicholas Bellinger struct se_device *se_dev, 562cbf031f4SNicholas Bellinger unsigned char *cdb, 563cbf031f4SNicholas Bellinger bool remote_port, 564cbf031f4SNicholas Bellinger bool alloc_mem) 565cbf031f4SNicholas Bellinger { 566cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 567cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 568cbf031f4SNicholas Bellinger int ret = 0, rc; 569cbf031f4SNicholas Bellinger /* 570cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 571cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 572cbf031f4SNicholas Bellinger */ 5732c336e3aSChristoph Hellwig target_xcopy_init_pt_lun(se_dev, cmd, remote_port); 5742c336e3aSChristoph Hellwig 575cbf031f4SNicholas Bellinger xpt_cmd->xcopy_op = xop; 576cbf031f4SNicholas Bellinger target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); 577cbf031f4SNicholas Bellinger 578649ee054SBart Van Assche cmd->tag = 0; 579cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 580cbf031f4SNicholas Bellinger if (sense_rc) { 581cbf031f4SNicholas Bellinger ret = -EINVAL; 582cbf031f4SNicholas Bellinger goto out; 583cbf031f4SNicholas Bellinger } 584cbf031f4SNicholas Bellinger 585cbf031f4SNicholas Bellinger if (alloc_mem) { 586cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 587e64aa657SChristoph Hellwig cmd->data_length, false, false); 588cbf031f4SNicholas Bellinger if (rc < 0) { 589cbf031f4SNicholas Bellinger ret = rc; 590cbf031f4SNicholas Bellinger goto out; 591cbf031f4SNicholas Bellinger } 592cbf031f4SNicholas Bellinger /* 593cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 594cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 595cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 596cbf031f4SNicholas Bellinger */ 597cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 598cbf031f4SNicholas Bellinger } else { 599cbf031f4SNicholas Bellinger /* 600cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 601cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 602cbf031f4SNicholas Bellinger */ 603cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 604cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 605cbf031f4SNicholas Bellinger NULL, 0); 606cbf031f4SNicholas Bellinger if (sense_rc) { 607cbf031f4SNicholas Bellinger ret = -EINVAL; 608cbf031f4SNicholas Bellinger goto out; 609cbf031f4SNicholas Bellinger } 610cbf031f4SNicholas Bellinger 611cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 612cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 613cbf031f4SNicholas Bellinger } 614cbf031f4SNicholas Bellinger 615cbf031f4SNicholas Bellinger return 0; 616cbf031f4SNicholas Bellinger 617cbf031f4SNicholas Bellinger out: 618cbf031f4SNicholas Bellinger return ret; 619cbf031f4SNicholas Bellinger } 620cbf031f4SNicholas Bellinger 621cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 622cbf031f4SNicholas Bellinger { 623cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 624cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 625cbf031f4SNicholas Bellinger 626cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 627cbf031f4SNicholas Bellinger if (sense_rc) 628cbf031f4SNicholas Bellinger return -EINVAL; 629cbf031f4SNicholas Bellinger 630cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 631cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 632cbf031f4SNicholas Bellinger 633cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 634cbf031f4SNicholas Bellinger 635cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 636cbf031f4SNicholas Bellinger se_cmd->scsi_status); 6378a955d6dSNicholas Bellinger 6388a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 639cbf031f4SNicholas Bellinger } 640cbf031f4SNicholas Bellinger 641cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 642cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 643cbf031f4SNicholas Bellinger struct xcopy_op *xop, 644cbf031f4SNicholas Bellinger struct se_device *src_dev, 645cbf031f4SNicholas Bellinger sector_t src_lba, 646cbf031f4SNicholas Bellinger u32 src_sectors) 647cbf031f4SNicholas Bellinger { 648cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 649cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 650cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 651cbf031f4SNicholas Bellinger int rc; 652cbf031f4SNicholas Bellinger unsigned char cdb[16]; 653cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 654cbf031f4SNicholas Bellinger 655cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 656cbf031f4SNicholas Bellinger if (!xpt_cmd) { 657cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 658cbf031f4SNicholas Bellinger return -ENOMEM; 659cbf031f4SNicholas Bellinger } 660cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 661cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 662cbf031f4SNicholas Bellinger 663cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 664cbf031f4SNicholas Bellinger cdb[0] = READ_16; 665cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 666cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 667cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 668cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 669cbf031f4SNicholas Bellinger 6704416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 671366bda19SNicholas Bellinger DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 672cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 673cbf031f4SNicholas Bellinger 674cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 675cbf031f4SNicholas Bellinger remote_port, true); 676cbf031f4SNicholas Bellinger if (rc < 0) { 677926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 678cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 679cbf031f4SNicholas Bellinger return rc; 680cbf031f4SNicholas Bellinger } 681cbf031f4SNicholas Bellinger 682cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 683cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 684cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 685cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 686cbf031f4SNicholas Bellinger 687cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 688cbf031f4SNicholas Bellinger if (rc < 0) { 689926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 690cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 691cbf031f4SNicholas Bellinger return rc; 692cbf031f4SNicholas Bellinger } 693cbf031f4SNicholas Bellinger /* 694cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 695cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 696cbf031f4SNicholas Bellinger */ 697cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 698cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 699cbf031f4SNicholas Bellinger 700cbf031f4SNicholas Bellinger return 0; 701cbf031f4SNicholas Bellinger } 702cbf031f4SNicholas Bellinger 703cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 704cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 705cbf031f4SNicholas Bellinger struct xcopy_op *xop, 706cbf031f4SNicholas Bellinger struct se_device *dst_dev, 707cbf031f4SNicholas Bellinger sector_t dst_lba, 708cbf031f4SNicholas Bellinger u32 dst_sectors) 709cbf031f4SNicholas Bellinger { 710cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 711cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 712cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 713cbf031f4SNicholas Bellinger int rc; 714cbf031f4SNicholas Bellinger unsigned char cdb[16]; 715cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 716cbf031f4SNicholas Bellinger 717cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 718cbf031f4SNicholas Bellinger if (!xpt_cmd) { 719cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 720cbf031f4SNicholas Bellinger return -ENOMEM; 721cbf031f4SNicholas Bellinger } 722cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 723cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 724cbf031f4SNicholas Bellinger 725cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 726cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 727cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 728cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 729cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 730cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 731cbf031f4SNicholas Bellinger 7324416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 733366bda19SNicholas Bellinger DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 734cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 735cbf031f4SNicholas Bellinger 736cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 737cbf031f4SNicholas Bellinger remote_port, false); 738cbf031f4SNicholas Bellinger if (rc < 0) { 739cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 740926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 741cbf031f4SNicholas Bellinger /* 742cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 743cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 744cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 745cbf031f4SNicholas Bellinger */ 746cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 747cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 748cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 749cbf031f4SNicholas Bellinger 750cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 751cbf031f4SNicholas Bellinger return rc; 752cbf031f4SNicholas Bellinger } 753cbf031f4SNicholas Bellinger 754cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 755cbf031f4SNicholas Bellinger if (rc < 0) { 756926317deSDinesh Israni ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; 757cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 758cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 759cbf031f4SNicholas Bellinger return rc; 760cbf031f4SNicholas Bellinger } 761cbf031f4SNicholas Bellinger 762cbf031f4SNicholas Bellinger return 0; 763cbf031f4SNicholas Bellinger } 764cbf031f4SNicholas Bellinger 765cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 766cbf031f4SNicholas Bellinger { 767cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 768cbf031f4SNicholas Bellinger struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; 769cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 770cbf031f4SNicholas Bellinger sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; 771cbf031f4SNicholas Bellinger unsigned int max_sectors; 772cbf031f4SNicholas Bellinger int rc; 773cbf031f4SNicholas Bellinger unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; 774cbf031f4SNicholas Bellinger 775cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 776cbf031f4SNicholas Bellinger /* 777cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 778cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 779cbf031f4SNicholas Bellinger */ 780cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 781cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 782cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 783cbf031f4SNicholas Bellinger 784cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 785cbf031f4SNicholas Bellinger 786cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 787cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 788cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 789cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 790cbf031f4SNicholas Bellinger 791cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 792cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 793cbf031f4SNicholas Bellinger 794cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 795cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 796cbf031f4SNicholas Bellinger 797cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 798cbf031f4SNicholas Bellinger if (rc < 0) 799cbf031f4SNicholas Bellinger goto out; 800cbf031f4SNicholas Bellinger 801cbf031f4SNicholas Bellinger src_lba += cur_nolb; 802cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 803cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 804cbf031f4SNicholas Bellinger 805cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 806cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 807cbf031f4SNicholas Bellinger 808cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 809cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 810cbf031f4SNicholas Bellinger if (rc < 0) { 811cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 812cbf031f4SNicholas Bellinger goto out; 813cbf031f4SNicholas Bellinger } 814cbf031f4SNicholas Bellinger 815cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 816cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 817cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 818cbf031f4SNicholas Bellinger 819cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 820cbf031f4SNicholas Bellinger nolb -= cur_nolb; 821cbf031f4SNicholas Bellinger 822cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 823cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 824cbf031f4SNicholas Bellinger 825cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 826cbf031f4SNicholas Bellinger } 827cbf031f4SNicholas Bellinger 828cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 829cbf031f4SNicholas Bellinger kfree(xop); 830cbf031f4SNicholas Bellinger 831cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 832cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 833cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 834cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 835cbf031f4SNicholas Bellinger 836cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 837cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 838cbf031f4SNicholas Bellinger return; 839cbf031f4SNicholas Bellinger 840cbf031f4SNicholas Bellinger out: 841cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 842cbf031f4SNicholas Bellinger kfree(xop); 843926317deSDinesh Israni /* 844926317deSDinesh Israni * Don't override an error scsi status if it has already been set 845926317deSDinesh Israni */ 846926317deSDinesh Israni if (ec_cmd->scsi_status == SAM_STAT_GOOD) { 847926317deSDinesh Israni pr_warn_ratelimited("target_xcopy_do_work: rc: %d, Setting X-COPY" 848926317deSDinesh Israni " CHECK_CONDITION -> sending response\n", rc); 849cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 850926317deSDinesh Israni } 851cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); 852cbf031f4SNicholas Bellinger } 853cbf031f4SNicholas Bellinger 854cbf031f4SNicholas Bellinger sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 855cbf031f4SNicholas Bellinger { 856acb3f260SNicholas Bellinger struct se_device *dev = se_cmd->se_dev; 857cbf031f4SNicholas Bellinger struct xcopy_op *xop = NULL; 858cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 859cbf031f4SNicholas Bellinger unsigned int list_id, list_id_usage, sdll, inline_dl, sa; 86048502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 861cbf031f4SNicholas Bellinger int rc; 862cbf031f4SNicholas Bellinger unsigned short tdll; 863cbf031f4SNicholas Bellinger 864acb3f260SNicholas Bellinger if (!dev->dev_attrib.emulate_3pc) { 865acb3f260SNicholas Bellinger pr_err("EXTENDED_COPY operation explicitly disabled\n"); 866acb3f260SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 867acb3f260SNicholas Bellinger } 868acb3f260SNicholas Bellinger 869cbf031f4SNicholas Bellinger sa = se_cmd->t_task_cdb[1] & 0x1f; 870cbf031f4SNicholas Bellinger if (sa != 0x00) { 871cbf031f4SNicholas Bellinger pr_err("EXTENDED_COPY(LID4) not supported\n"); 872cbf031f4SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 873cbf031f4SNicholas Bellinger } 874cbf031f4SNicholas Bellinger 875934a138eSNicholas Bellinger xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 876934a138eSNicholas Bellinger if (!xop) { 877934a138eSNicholas Bellinger pr_err("Unable to allocate xcopy_op\n"); 878934a138eSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 879934a138eSNicholas Bellinger } 880934a138eSNicholas Bellinger xop->xop_se_cmd = se_cmd; 881934a138eSNicholas Bellinger 882cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 883cbf031f4SNicholas Bellinger if (!p) { 884cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 885934a138eSNicholas Bellinger kfree(xop); 886cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 887cbf031f4SNicholas Bellinger } 888cbf031f4SNicholas Bellinger 889cbf031f4SNicholas Bellinger list_id = p[0]; 8903f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8913f7a46c6SNicholas Bellinger 892cbf031f4SNicholas Bellinger /* 893cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 894cbf031f4SNicholas Bellinger */ 895cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 896cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 8977d387066SDavid Disseldorp if (tdll + sdll > RCR_OP_MAX_DESC_LIST_LEN) { 8987d387066SDavid Disseldorp pr_err("XCOPY descriptor list length %u exceeds maximum %u\n", 8997d387066SDavid Disseldorp tdll + sdll, RCR_OP_MAX_DESC_LIST_LEN); 9007d387066SDavid Disseldorp ret = TCM_PARAMETER_LIST_LENGTH_ERROR; 9017d387066SDavid Disseldorp goto out; 9027d387066SDavid Disseldorp } 903cbf031f4SNicholas Bellinger 904cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 905cbf031f4SNicholas Bellinger if (inline_dl != 0) { 906cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 907cbf031f4SNicholas Bellinger goto out; 908cbf031f4SNicholas Bellinger } 909cbf031f4SNicholas Bellinger 910cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 911cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 912cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 913cbf031f4SNicholas Bellinger 914449a1378SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll, &ret); 915cbf031f4SNicholas Bellinger if (rc <= 0) 916cbf031f4SNicholas Bellinger goto out; 917cbf031f4SNicholas Bellinger 91848502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 91948502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 92048502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 92148502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 92248502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 92348502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 92448502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 92548502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 92648502ddbSNicholas Bellinger goto out; 92748502ddbSNicholas Bellinger } 92848502ddbSNicholas Bellinger 929cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 930cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 931cbf031f4SNicholas Bellinger seg_desc = &p[16]; 932cbf031f4SNicholas Bellinger seg_desc += (rc * XCOPY_TARGET_DESC_LEN); 933cbf031f4SNicholas Bellinger 934af9f62c1SDavid Disseldorp rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, 935af9f62c1SDavid Disseldorp sdll, &ret); 936cbf031f4SNicholas Bellinger if (rc <= 0) { 937cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 938cbf031f4SNicholas Bellinger goto out; 939cbf031f4SNicholas Bellinger } 940cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 941cbf031f4SNicholas Bellinger 942cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 943cbf031f4SNicholas Bellinger rc * XCOPY_SEGMENT_DESC_LEN); 944cbf031f4SNicholas Bellinger INIT_WORK(&xop->xop_work, target_xcopy_do_work); 945cbf031f4SNicholas Bellinger queue_work(xcopy_wq, &xop->xop_work); 946cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 947cbf031f4SNicholas Bellinger 948cbf031f4SNicholas Bellinger out: 949cbf031f4SNicholas Bellinger if (p) 950cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 951cbf031f4SNicholas Bellinger kfree(xop); 95248502ddbSNicholas Bellinger return ret; 953cbf031f4SNicholas Bellinger } 954cbf031f4SNicholas Bellinger 955cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 956cbf031f4SNicholas Bellinger { 957cbf031f4SNicholas Bellinger unsigned char *p; 958cbf031f4SNicholas Bellinger 959cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 960cbf031f4SNicholas Bellinger if (!p) { 961cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 962cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 963cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 964cbf031f4SNicholas Bellinger } 965cbf031f4SNicholas Bellinger 966cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 967cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 968cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 969cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 970cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 971cbf031f4SNicholas Bellinger } 972cbf031f4SNicholas Bellinger /* 973cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 974cbf031f4SNicholas Bellinger */ 975cbf031f4SNicholas Bellinger p[4] = 0x1; 976cbf031f4SNicholas Bellinger /* 977cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 978cbf031f4SNicholas Bellinger */ 979cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 980cbf031f4SNicholas Bellinger /* 981cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 982cbf031f4SNicholas Bellinger */ 983cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 984cbf031f4SNicholas Bellinger /* 985cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 986cbf031f4SNicholas Bellinger */ 987cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 988cbf031f4SNicholas Bellinger /* 989cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 990cbf031f4SNicholas Bellinger */ 991cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 992cbf031f4SNicholas Bellinger /* 993cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 994cbf031f4SNicholas Bellinger */ 995cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 996cbf031f4SNicholas Bellinger /* 997cbf031f4SNicholas Bellinger * HELD DATA LIMIT 998cbf031f4SNicholas Bellinger */ 999cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 1000cbf031f4SNicholas Bellinger /* 1001cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 1002cbf031f4SNicholas Bellinger */ 1003cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 1004cbf031f4SNicholas Bellinger /* 1005cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 1006cbf031f4SNicholas Bellinger */ 1007cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 1008cbf031f4SNicholas Bellinger /* 1009cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 1010cbf031f4SNicholas Bellinger */ 1011cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 1012cbf031f4SNicholas Bellinger /* 1013cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 1014cbf031f4SNicholas Bellinger */ 1015cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 1016cbf031f4SNicholas Bellinger /* 1017cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 1018cbf031f4SNicholas Bellinger */ 1019cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 1020cbf031f4SNicholas Bellinger /* 1021cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 1022cbf031f4SNicholas Bellinger */ 1023cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 1024cbf031f4SNicholas Bellinger /* 1025cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 1026cbf031f4SNicholas Bellinger */ 1027cbf031f4SNicholas Bellinger p[43] = 0x2; 1028cbf031f4SNicholas Bellinger /* 1029cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 1030cbf031f4SNicholas Bellinger */ 1031cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 1032cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 1033cbf031f4SNicholas Bellinger 1034cbf031f4SNicholas Bellinger /* 1035cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 1036cbf031f4SNicholas Bellinger */ 1037cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1038cbf031f4SNicholas Bellinger 1039cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1040cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1041cbf031f4SNicholas Bellinger 1042cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1043cbf031f4SNicholas Bellinger } 1044cbf031f4SNicholas Bellinger 1045cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1046cbf031f4SNicholas Bellinger { 1047cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1048cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1049cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1050cbf031f4SNicholas Bellinger 1051cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1052cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1053cbf031f4SNicholas Bellinger 1054cbf031f4SNicholas Bellinger if (list_id != 0) { 1055cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1056cbf031f4SNicholas Bellinger " not supported\n"); 1057cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1058cbf031f4SNicholas Bellinger } 1059cbf031f4SNicholas Bellinger 1060cbf031f4SNicholas Bellinger switch (sa) { 1061cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1062cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1063cbf031f4SNicholas Bellinger break; 1064cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1065cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1066cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1067cbf031f4SNicholas Bellinger default: 1068cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1069cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1070cbf031f4SNicholas Bellinger } 1071cbf031f4SNicholas Bellinger 1072cbf031f4SNicholas Bellinger return rc; 1073cbf031f4SNicholas Bellinger } 1074