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> 28cbf031f4SNicholas Bellinger #include <scsi/scsi.h> 29cbf031f4SNicholas Bellinger #include <scsi/scsi_cmnd.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 108cbf031f4SNicholas Bellinger pr_err("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, 189cbf031f4SNicholas Bellinger unsigned short tdll) 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 197cbf031f4SNicholas Bellinger if (offset != 0) { 198cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 199cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 200cbf031f4SNicholas Bellinger return -EINVAL; 201cbf031f4SNicholas Bellinger } 202cbf031f4SNicholas Bellinger if (tdll > 64) { 203cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 204cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 205cbf031f4SNicholas Bellinger return -EINVAL; 206cbf031f4SNicholas Bellinger } 207cbf031f4SNicholas Bellinger /* 208cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 209cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 210cbf031f4SNicholas Bellinger */ 211cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 212cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 213cbf031f4SNicholas Bellinger 214cbf031f4SNicholas Bellinger while (start < tdll) { 215cbf031f4SNicholas Bellinger /* 216cbf031f4SNicholas Bellinger * Check target descriptor identification with 0xE4 type with 217cbf031f4SNicholas Bellinger * use VPD 0x83 WWPN matching .. 218cbf031f4SNicholas Bellinger */ 219cbf031f4SNicholas Bellinger switch (desc[0]) { 220cbf031f4SNicholas Bellinger case 0xe4: 221cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 222cbf031f4SNicholas Bellinger &desc[0], src); 223cbf031f4SNicholas Bellinger if (rc != 0) 224cbf031f4SNicholas Bellinger goto out; 225cbf031f4SNicholas Bellinger /* 226cbf031f4SNicholas Bellinger * Assume target descriptors are in source -> destination order.. 227cbf031f4SNicholas Bellinger */ 2280bcc297eSChristophe Vu-Brugier if (src) 229cbf031f4SNicholas Bellinger src = false; 230cbf031f4SNicholas Bellinger else 231cbf031f4SNicholas Bellinger src = true; 232cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 233cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 234cbf031f4SNicholas Bellinger ret++; 235cbf031f4SNicholas Bellinger break; 236cbf031f4SNicholas Bellinger default: 237cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 238cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 239cbf031f4SNicholas Bellinger goto out; 240cbf031f4SNicholas Bellinger } 241cbf031f4SNicholas Bellinger } 242cbf031f4SNicholas Bellinger 243cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 244cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); 245cbf031f4SNicholas Bellinger else 246cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); 247cbf031f4SNicholas Bellinger 248cbf031f4SNicholas Bellinger if (rc < 0) 249cbf031f4SNicholas Bellinger goto out; 250cbf031f4SNicholas Bellinger 251cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 252cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 253cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 254cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 255cbf031f4SNicholas Bellinger 256cbf031f4SNicholas Bellinger return ret; 257cbf031f4SNicholas Bellinger 258cbf031f4SNicholas Bellinger out: 259cbf031f4SNicholas Bellinger return -EINVAL; 260cbf031f4SNicholas Bellinger } 261cbf031f4SNicholas Bellinger 262cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 263cbf031f4SNicholas Bellinger unsigned char *p) 264cbf031f4SNicholas Bellinger { 265cbf031f4SNicholas Bellinger unsigned char *desc = p; 266cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 267cbf031f4SNicholas Bellinger unsigned short desc_len; 268cbf031f4SNicholas Bellinger 269cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 270cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 271cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 272cbf031f4SNicholas Bellinger " %hu\n", desc_len); 273cbf031f4SNicholas Bellinger return -EINVAL; 274cbf031f4SNicholas Bellinger } 275cbf031f4SNicholas Bellinger 276cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 277cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 278cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 279cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 280cbf031f4SNicholas Bellinger 281cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 282cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 283cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 284cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 285cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 286cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 287cbf031f4SNicholas Bellinger 288cbf031f4SNicholas Bellinger if (dc != 0) { 2893e9e01deSNicholas Bellinger xop->dbl = (desc[29] & 0xff) << 16; 2903e9e01deSNicholas Bellinger xop->dbl |= (desc[30] & 0xff) << 8; 291cbf031f4SNicholas Bellinger xop->dbl |= desc[31] & 0xff; 292cbf031f4SNicholas Bellinger 293cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 294cbf031f4SNicholas Bellinger } 295cbf031f4SNicholas Bellinger return 0; 296cbf031f4SNicholas Bellinger } 297cbf031f4SNicholas Bellinger 298cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 299cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 300cbf031f4SNicholas Bellinger unsigned int sdll) 301cbf031f4SNicholas Bellinger { 302cbf031f4SNicholas Bellinger unsigned char *desc = p; 303cbf031f4SNicholas Bellinger unsigned int start = 0; 304cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 305cbf031f4SNicholas Bellinger 306cbf031f4SNicholas Bellinger if (offset != 0) { 307cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 308cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 309cbf031f4SNicholas Bellinger return -EINVAL; 310cbf031f4SNicholas Bellinger } 311cbf031f4SNicholas Bellinger 312cbf031f4SNicholas Bellinger while (start < sdll) { 313cbf031f4SNicholas Bellinger /* 314cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 315cbf031f4SNicholas Bellinger */ 316cbf031f4SNicholas Bellinger switch (desc[0]) { 317cbf031f4SNicholas Bellinger case 0x02: 318cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 319cbf031f4SNicholas Bellinger if (rc < 0) 320cbf031f4SNicholas Bellinger goto out; 321cbf031f4SNicholas Bellinger 322cbf031f4SNicholas Bellinger ret++; 323cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 324cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 325cbf031f4SNicholas Bellinger break; 326cbf031f4SNicholas Bellinger default: 3276774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 328cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 329cbf031f4SNicholas Bellinger goto out; 330cbf031f4SNicholas Bellinger } 331cbf031f4SNicholas Bellinger } 332cbf031f4SNicholas Bellinger 333cbf031f4SNicholas Bellinger return ret; 334cbf031f4SNicholas Bellinger 335cbf031f4SNicholas Bellinger out: 336cbf031f4SNicholas Bellinger return -EINVAL; 337cbf031f4SNicholas Bellinger } 338cbf031f4SNicholas Bellinger 339cbf031f4SNicholas Bellinger /* 340cbf031f4SNicholas Bellinger * Start xcopy_pt ops 341cbf031f4SNicholas Bellinger */ 342cbf031f4SNicholas Bellinger 343cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 344cbf031f4SNicholas Bellinger bool remote_port; 345cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 346cbf031f4SNicholas Bellinger struct xcopy_op *xcopy_op; 347cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 348366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 349cbf031f4SNicholas Bellinger }; 350cbf031f4SNicholas Bellinger 351adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 352cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 353cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 354cbf031f4SNicholas Bellinger 355cbf031f4SNicholas Bellinger static char *xcopy_pt_get_fabric_name(void) 356cbf031f4SNicholas Bellinger { 357cbf031f4SNicholas Bellinger return "xcopy-pt"; 358cbf031f4SNicholas Bellinger } 359cbf031f4SNicholas Bellinger 360cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 361cbf031f4SNicholas Bellinger { 362cbf031f4SNicholas Bellinger return 0; 363cbf031f4SNicholas Bellinger } 364cbf031f4SNicholas Bellinger 365cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 366cbf031f4SNicholas Bellinger { 367cbf031f4SNicholas Bellinger struct se_device *remote_dev; 368cbf031f4SNicholas Bellinger 369cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 370cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 371cbf031f4SNicholas Bellinger else 372cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 373cbf031f4SNicholas Bellinger 374d588cf8fSChristoph Hellwig pr_debug("Calling configfs_undepend_item for" 375cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 376d588cf8fSChristoph Hellwig remote_dev, &remote_dev->dev_group.cg_item); 377cbf031f4SNicholas Bellinger 378d588cf8fSChristoph Hellwig target_undepend_item(&remote_dev->dev_group.cg_item); 379cbf031f4SNicholas Bellinger } 380cbf031f4SNicholas Bellinger 381cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 382cbf031f4SNicholas Bellinger { 383cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 384cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 385cbf031f4SNicholas Bellinger 386cbf031f4SNicholas Bellinger kfree(xpt_cmd); 387cbf031f4SNicholas Bellinger } 388cbf031f4SNicholas Bellinger 389cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 390cbf031f4SNicholas Bellinger { 391cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 392cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 393cbf031f4SNicholas Bellinger 394cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 395cbf031f4SNicholas Bellinger return 0; 396cbf031f4SNicholas Bellinger } 397cbf031f4SNicholas Bellinger 398cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 399cbf031f4SNicholas Bellinger { 400cbf031f4SNicholas Bellinger return 0; 401cbf031f4SNicholas Bellinger } 402cbf031f4SNicholas Bellinger 403cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) 404cbf031f4SNicholas Bellinger { 405cbf031f4SNicholas Bellinger return 0; 406cbf031f4SNicholas Bellinger } 407cbf031f4SNicholas Bellinger 408cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 409cbf031f4SNicholas Bellinger { 410cbf031f4SNicholas Bellinger return 0; 411cbf031f4SNicholas Bellinger } 412cbf031f4SNicholas Bellinger 413cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 414cbf031f4SNicholas Bellinger { 415cbf031f4SNicholas Bellinger return 0; 416cbf031f4SNicholas Bellinger } 417cbf031f4SNicholas Bellinger 4189ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 419cbf031f4SNicholas Bellinger .get_fabric_name = xcopy_pt_get_fabric_name, 420cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 421cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 422cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 423cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 424cbf031f4SNicholas Bellinger .write_pending_status = xcopy_pt_write_pending_status, 425cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 426cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 427cbf031f4SNicholas Bellinger }; 428cbf031f4SNicholas Bellinger 429cbf031f4SNicholas Bellinger /* 430cbf031f4SNicholas Bellinger * End xcopy_pt_ops 431cbf031f4SNicholas Bellinger */ 432cbf031f4SNicholas Bellinger 433cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 434cbf031f4SNicholas Bellinger { 435cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 436cbf031f4SNicholas Bellinger if (!xcopy_wq) { 437cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 438cbf031f4SNicholas Bellinger return -ENOMEM; 439cbf031f4SNicholas Bellinger } 440cbf031f4SNicholas Bellinger 441cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 442cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); 443cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 444cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 445cbf031f4SNicholas Bellinger 446cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 447cbf031f4SNicholas Bellinger 448cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 449cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 450cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 451cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 452cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); 453cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); 454cbf031f4SNicholas Bellinger 455cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 456cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 457cbf031f4SNicholas Bellinger 458cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 459cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 460cbf031f4SNicholas Bellinger 461cbf031f4SNicholas Bellinger return 0; 462cbf031f4SNicholas Bellinger } 463cbf031f4SNicholas Bellinger 464cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 465cbf031f4SNicholas Bellinger { 466cbf031f4SNicholas Bellinger if (xcopy_wq) 467cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 468cbf031f4SNicholas Bellinger } 469cbf031f4SNicholas Bellinger 470cbf031f4SNicholas Bellinger static void target_xcopy_setup_pt_port( 471cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 472cbf031f4SNicholas Bellinger struct xcopy_op *xop, 473cbf031f4SNicholas Bellinger bool remote_port) 474cbf031f4SNicholas Bellinger { 475cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 476cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; 477cbf031f4SNicholas Bellinger 478cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) { 479cbf031f4SNicholas Bellinger /* 480cbf031f4SNicholas Bellinger * Honor destination port reservations for X-COPY PUSH emulation 481cbf031f4SNicholas Bellinger * when CDB is received on local source port, and READs blocks to 482cbf031f4SNicholas Bellinger * WRITE on remote destination port. 483cbf031f4SNicholas Bellinger */ 484cbf031f4SNicholas Bellinger if (remote_port) { 485cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 486cbf031f4SNicholas Bellinger } else { 487cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 488cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 489cbf031f4SNicholas Bellinger 490cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_dev:" 491cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 492cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 493cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", 494cbf031f4SNicholas Bellinger pt_cmd->se_lun); 495cbf031f4SNicholas Bellinger } 496cbf031f4SNicholas Bellinger } else { 497cbf031f4SNicholas Bellinger /* 498cbf031f4SNicholas Bellinger * Honor source port reservation for X-COPY PULL emulation 499cbf031f4SNicholas Bellinger * when CDB is received on local desintation port, and READs 500cbf031f4SNicholas Bellinger * blocks from the remote source port to WRITE on local 501cbf031f4SNicholas Bellinger * destination port. 502cbf031f4SNicholas Bellinger */ 503cbf031f4SNicholas Bellinger if (remote_port) { 504cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 505cbf031f4SNicholas Bellinger } else { 506cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 507cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 508cbf031f4SNicholas Bellinger 509cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_dev:" 510cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 511cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 512cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", 513cbf031f4SNicholas Bellinger pt_cmd->se_lun); 514cbf031f4SNicholas Bellinger } 515cbf031f4SNicholas Bellinger } 516cbf031f4SNicholas Bellinger } 517cbf031f4SNicholas Bellinger 5182c336e3aSChristoph Hellwig static void target_xcopy_init_pt_lun(struct se_device *se_dev, 5192c336e3aSChristoph Hellwig struct se_cmd *pt_cmd, bool remote_port) 520cbf031f4SNicholas Bellinger { 521cbf031f4SNicholas Bellinger /* 522cbf031f4SNicholas Bellinger * Don't allocate + init an pt_cmd->se_lun if honoring local port for 523cbf031f4SNicholas Bellinger * reservations. The pt_cmd->se_lun pointer will be setup from within 524cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_port() 525cbf031f4SNicholas Bellinger */ 5262c336e3aSChristoph Hellwig if (remote_port) { 5272c336e3aSChristoph Hellwig pr_debug("Setup emulated se_dev: %p from se_dev\n", 5282c336e3aSChristoph Hellwig pt_cmd->se_dev); 5294863e525SNicholas Bellinger pt_cmd->se_lun = &se_dev->xcopy_lun; 530cbf031f4SNicholas Bellinger pt_cmd->se_dev = se_dev; 5312c336e3aSChristoph Hellwig } 532cbf031f4SNicholas Bellinger 533c3d0a7c2SChristoph Hellwig pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 534cbf031f4SNicholas Bellinger } 535cbf031f4SNicholas Bellinger 536cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 537cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 538cbf031f4SNicholas Bellinger struct xcopy_op *xop, 539cbf031f4SNicholas Bellinger struct se_device *se_dev, 540cbf031f4SNicholas Bellinger unsigned char *cdb, 541cbf031f4SNicholas Bellinger bool remote_port, 542cbf031f4SNicholas Bellinger bool alloc_mem) 543cbf031f4SNicholas Bellinger { 544cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 545cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 546cbf031f4SNicholas Bellinger int ret = 0, rc; 547cbf031f4SNicholas Bellinger /* 548cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 549cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 550cbf031f4SNicholas Bellinger */ 5512c336e3aSChristoph Hellwig target_xcopy_init_pt_lun(se_dev, cmd, remote_port); 5522c336e3aSChristoph Hellwig 553cbf031f4SNicholas Bellinger xpt_cmd->xcopy_op = xop; 554cbf031f4SNicholas Bellinger target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); 555cbf031f4SNicholas Bellinger 556649ee054SBart Van Assche cmd->tag = 0; 557cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 558cbf031f4SNicholas Bellinger if (sense_rc) { 559cbf031f4SNicholas Bellinger ret = -EINVAL; 560cbf031f4SNicholas Bellinger goto out; 561cbf031f4SNicholas Bellinger } 562cbf031f4SNicholas Bellinger 563cbf031f4SNicholas Bellinger if (alloc_mem) { 564cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 565cbf031f4SNicholas Bellinger cmd->data_length, false); 566cbf031f4SNicholas Bellinger if (rc < 0) { 567cbf031f4SNicholas Bellinger ret = rc; 568cbf031f4SNicholas Bellinger goto out; 569cbf031f4SNicholas Bellinger } 570cbf031f4SNicholas Bellinger /* 571cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 572cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 573cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 574cbf031f4SNicholas Bellinger */ 575cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 576cbf031f4SNicholas Bellinger } else { 577cbf031f4SNicholas Bellinger /* 578cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 579cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 580cbf031f4SNicholas Bellinger */ 581cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 582cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 583cbf031f4SNicholas Bellinger NULL, 0); 584cbf031f4SNicholas Bellinger if (sense_rc) { 585cbf031f4SNicholas Bellinger ret = -EINVAL; 586cbf031f4SNicholas Bellinger goto out; 587cbf031f4SNicholas Bellinger } 588cbf031f4SNicholas Bellinger 589cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 590cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 591cbf031f4SNicholas Bellinger } 592cbf031f4SNicholas Bellinger 593cbf031f4SNicholas Bellinger return 0; 594cbf031f4SNicholas Bellinger 595cbf031f4SNicholas Bellinger out: 596cbf031f4SNicholas Bellinger return ret; 597cbf031f4SNicholas Bellinger } 598cbf031f4SNicholas Bellinger 599cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 600cbf031f4SNicholas Bellinger { 601cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 602cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 603cbf031f4SNicholas Bellinger 604cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 605cbf031f4SNicholas Bellinger if (sense_rc) 606cbf031f4SNicholas Bellinger return -EINVAL; 607cbf031f4SNicholas Bellinger 608cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 609cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 610cbf031f4SNicholas Bellinger 611cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 612cbf031f4SNicholas Bellinger 613cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 614cbf031f4SNicholas Bellinger se_cmd->scsi_status); 6158a955d6dSNicholas Bellinger 6168a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 617cbf031f4SNicholas Bellinger } 618cbf031f4SNicholas Bellinger 619cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 620cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 621cbf031f4SNicholas Bellinger struct xcopy_op *xop, 622cbf031f4SNicholas Bellinger struct se_device *src_dev, 623cbf031f4SNicholas Bellinger sector_t src_lba, 624cbf031f4SNicholas Bellinger u32 src_sectors) 625cbf031f4SNicholas Bellinger { 626cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 627cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 628cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 629cbf031f4SNicholas Bellinger int rc; 630cbf031f4SNicholas Bellinger unsigned char cdb[16]; 631cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 632cbf031f4SNicholas Bellinger 633cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 634cbf031f4SNicholas Bellinger if (!xpt_cmd) { 635cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 636cbf031f4SNicholas Bellinger return -ENOMEM; 637cbf031f4SNicholas Bellinger } 638cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 639cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 640cbf031f4SNicholas Bellinger 641cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 642cbf031f4SNicholas Bellinger cdb[0] = READ_16; 643cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 644cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 645cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 646cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 647cbf031f4SNicholas Bellinger 648cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 649366bda19SNicholas Bellinger DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 650cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 651cbf031f4SNicholas Bellinger 652cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 653cbf031f4SNicholas Bellinger remote_port, true); 654cbf031f4SNicholas Bellinger if (rc < 0) { 655cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 656cbf031f4SNicholas Bellinger return rc; 657cbf031f4SNicholas Bellinger } 658cbf031f4SNicholas Bellinger 659cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 660cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 661cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 662cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 663cbf031f4SNicholas Bellinger 664cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 665cbf031f4SNicholas Bellinger if (rc < 0) { 666cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 667cbf031f4SNicholas Bellinger return rc; 668cbf031f4SNicholas Bellinger } 669cbf031f4SNicholas Bellinger /* 670cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 671cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 672cbf031f4SNicholas Bellinger */ 673cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 674cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 675cbf031f4SNicholas Bellinger 676cbf031f4SNicholas Bellinger return 0; 677cbf031f4SNicholas Bellinger } 678cbf031f4SNicholas Bellinger 679cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 680cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 681cbf031f4SNicholas Bellinger struct xcopy_op *xop, 682cbf031f4SNicholas Bellinger struct se_device *dst_dev, 683cbf031f4SNicholas Bellinger sector_t dst_lba, 684cbf031f4SNicholas Bellinger u32 dst_sectors) 685cbf031f4SNicholas Bellinger { 686cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 687cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 688cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 689cbf031f4SNicholas Bellinger int rc; 690cbf031f4SNicholas Bellinger unsigned char cdb[16]; 691cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 692cbf031f4SNicholas Bellinger 693cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 694cbf031f4SNicholas Bellinger if (!xpt_cmd) { 695cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 696cbf031f4SNicholas Bellinger return -ENOMEM; 697cbf031f4SNicholas Bellinger } 698cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 699cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 700cbf031f4SNicholas Bellinger 701cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 702cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 703cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 704cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 705cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 706cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 707cbf031f4SNicholas Bellinger 708cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 709366bda19SNicholas Bellinger DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 710cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 711cbf031f4SNicholas Bellinger 712cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 713cbf031f4SNicholas Bellinger remote_port, false); 714cbf031f4SNicholas Bellinger if (rc < 0) { 715cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 716cbf031f4SNicholas Bellinger /* 717cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 718cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 719cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 720cbf031f4SNicholas Bellinger */ 721cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 722cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 723cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 724cbf031f4SNicholas Bellinger 725cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 726cbf031f4SNicholas Bellinger return rc; 727cbf031f4SNicholas Bellinger } 728cbf031f4SNicholas Bellinger 729cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 730cbf031f4SNicholas Bellinger if (rc < 0) { 731cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 732cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 733cbf031f4SNicholas Bellinger return rc; 734cbf031f4SNicholas Bellinger } 735cbf031f4SNicholas Bellinger 736cbf031f4SNicholas Bellinger return 0; 737cbf031f4SNicholas Bellinger } 738cbf031f4SNicholas Bellinger 739cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 740cbf031f4SNicholas Bellinger { 741cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 742cbf031f4SNicholas Bellinger struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; 743cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 744cbf031f4SNicholas Bellinger sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; 745cbf031f4SNicholas Bellinger unsigned int max_sectors; 746cbf031f4SNicholas Bellinger int rc; 747cbf031f4SNicholas Bellinger unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; 748cbf031f4SNicholas Bellinger 749cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 750cbf031f4SNicholas Bellinger /* 751cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 752cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 753cbf031f4SNicholas Bellinger */ 754cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 755cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 756cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 757cbf031f4SNicholas Bellinger 758cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 759cbf031f4SNicholas Bellinger 760cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 761cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 762cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 763cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 764cbf031f4SNicholas Bellinger 765cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 766cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 767cbf031f4SNicholas Bellinger 768cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 769cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 770cbf031f4SNicholas Bellinger 771cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 772cbf031f4SNicholas Bellinger if (rc < 0) 773cbf031f4SNicholas Bellinger goto out; 774cbf031f4SNicholas Bellinger 775cbf031f4SNicholas Bellinger src_lba += cur_nolb; 776cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 777cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 778cbf031f4SNicholas Bellinger 779cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 780cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 781cbf031f4SNicholas Bellinger 782cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 783cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 784cbf031f4SNicholas Bellinger if (rc < 0) { 785cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 786cbf031f4SNicholas Bellinger goto out; 787cbf031f4SNicholas Bellinger } 788cbf031f4SNicholas Bellinger 789cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 790cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 791cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 792cbf031f4SNicholas Bellinger 793cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 794cbf031f4SNicholas Bellinger nolb -= cur_nolb; 795cbf031f4SNicholas Bellinger 796cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 797cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 798cbf031f4SNicholas Bellinger 799cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 800cbf031f4SNicholas Bellinger } 801cbf031f4SNicholas Bellinger 802cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 803cbf031f4SNicholas Bellinger kfree(xop); 804cbf031f4SNicholas Bellinger 805cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 806cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 807cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 808cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 809cbf031f4SNicholas Bellinger 810cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 811cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 812cbf031f4SNicholas Bellinger return; 813cbf031f4SNicholas Bellinger 814cbf031f4SNicholas Bellinger out: 815cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 816cbf031f4SNicholas Bellinger kfree(xop); 817cbf031f4SNicholas Bellinger 818cbf031f4SNicholas Bellinger pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); 819cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 820cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); 821cbf031f4SNicholas Bellinger } 822cbf031f4SNicholas Bellinger 823cbf031f4SNicholas Bellinger sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 824cbf031f4SNicholas Bellinger { 825acb3f260SNicholas Bellinger struct se_device *dev = se_cmd->se_dev; 826cbf031f4SNicholas Bellinger struct xcopy_op *xop = NULL; 827cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 828cbf031f4SNicholas Bellinger unsigned int list_id, list_id_usage, sdll, inline_dl, sa; 82948502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 830cbf031f4SNicholas Bellinger int rc; 831cbf031f4SNicholas Bellinger unsigned short tdll; 832cbf031f4SNicholas Bellinger 833acb3f260SNicholas Bellinger if (!dev->dev_attrib.emulate_3pc) { 834acb3f260SNicholas Bellinger pr_err("EXTENDED_COPY operation explicitly disabled\n"); 835acb3f260SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 836acb3f260SNicholas Bellinger } 837acb3f260SNicholas Bellinger 838cbf031f4SNicholas Bellinger sa = se_cmd->t_task_cdb[1] & 0x1f; 839cbf031f4SNicholas Bellinger if (sa != 0x00) { 840cbf031f4SNicholas Bellinger pr_err("EXTENDED_COPY(LID4) not supported\n"); 841cbf031f4SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 842cbf031f4SNicholas Bellinger } 843cbf031f4SNicholas Bellinger 844934a138eSNicholas Bellinger xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 845934a138eSNicholas Bellinger if (!xop) { 846934a138eSNicholas Bellinger pr_err("Unable to allocate xcopy_op\n"); 847934a138eSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 848934a138eSNicholas Bellinger } 849934a138eSNicholas Bellinger xop->xop_se_cmd = se_cmd; 850934a138eSNicholas Bellinger 851cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 852cbf031f4SNicholas Bellinger if (!p) { 853cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 854934a138eSNicholas Bellinger kfree(xop); 855cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 856cbf031f4SNicholas Bellinger } 857cbf031f4SNicholas Bellinger 858cbf031f4SNicholas Bellinger list_id = p[0]; 8593f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8603f7a46c6SNicholas Bellinger 861cbf031f4SNicholas Bellinger /* 862cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 863cbf031f4SNicholas Bellinger */ 864cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 865cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 866cbf031f4SNicholas Bellinger 867cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 868cbf031f4SNicholas Bellinger if (inline_dl != 0) { 869cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 870cbf031f4SNicholas Bellinger goto out; 871cbf031f4SNicholas Bellinger } 872cbf031f4SNicholas Bellinger 873cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 874cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 875cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 876cbf031f4SNicholas Bellinger 877cbf031f4SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); 878cbf031f4SNicholas Bellinger if (rc <= 0) 879cbf031f4SNicholas Bellinger goto out; 880cbf031f4SNicholas Bellinger 88148502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 88248502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 88348502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 88448502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 88548502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 88648502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 88748502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 88848502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 88948502ddbSNicholas Bellinger goto out; 89048502ddbSNicholas Bellinger } 89148502ddbSNicholas Bellinger 892cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 893cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 894cbf031f4SNicholas Bellinger seg_desc = &p[16]; 895cbf031f4SNicholas Bellinger seg_desc += (rc * XCOPY_TARGET_DESC_LEN); 896cbf031f4SNicholas Bellinger 897cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); 898cbf031f4SNicholas Bellinger if (rc <= 0) { 899cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 900cbf031f4SNicholas Bellinger goto out; 901cbf031f4SNicholas Bellinger } 902cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 903cbf031f4SNicholas Bellinger 904cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 905cbf031f4SNicholas Bellinger rc * XCOPY_SEGMENT_DESC_LEN); 906cbf031f4SNicholas Bellinger INIT_WORK(&xop->xop_work, target_xcopy_do_work); 907cbf031f4SNicholas Bellinger queue_work(xcopy_wq, &xop->xop_work); 908cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 909cbf031f4SNicholas Bellinger 910cbf031f4SNicholas Bellinger out: 911cbf031f4SNicholas Bellinger if (p) 912cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 913cbf031f4SNicholas Bellinger kfree(xop); 91448502ddbSNicholas Bellinger return ret; 915cbf031f4SNicholas Bellinger } 916cbf031f4SNicholas Bellinger 917cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 918cbf031f4SNicholas Bellinger { 919cbf031f4SNicholas Bellinger unsigned char *p; 920cbf031f4SNicholas Bellinger 921cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 922cbf031f4SNicholas Bellinger if (!p) { 923cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 924cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 925cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 926cbf031f4SNicholas Bellinger } 927cbf031f4SNicholas Bellinger 928cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 929cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 930cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 931cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 932cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 933cbf031f4SNicholas Bellinger } 934cbf031f4SNicholas Bellinger /* 935cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 936cbf031f4SNicholas Bellinger */ 937cbf031f4SNicholas Bellinger p[4] = 0x1; 938cbf031f4SNicholas Bellinger /* 939cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 940cbf031f4SNicholas Bellinger */ 941cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 942cbf031f4SNicholas Bellinger /* 943cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 944cbf031f4SNicholas Bellinger */ 945cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 946cbf031f4SNicholas Bellinger /* 947cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 948cbf031f4SNicholas Bellinger */ 949cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 950cbf031f4SNicholas Bellinger /* 951cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 952cbf031f4SNicholas Bellinger */ 953cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 954cbf031f4SNicholas Bellinger /* 955cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 956cbf031f4SNicholas Bellinger */ 957cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 958cbf031f4SNicholas Bellinger /* 959cbf031f4SNicholas Bellinger * HELD DATA LIMIT 960cbf031f4SNicholas Bellinger */ 961cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 962cbf031f4SNicholas Bellinger /* 963cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 964cbf031f4SNicholas Bellinger */ 965cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 966cbf031f4SNicholas Bellinger /* 967cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 968cbf031f4SNicholas Bellinger */ 969cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 970cbf031f4SNicholas Bellinger /* 971cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 972cbf031f4SNicholas Bellinger */ 973cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 974cbf031f4SNicholas Bellinger /* 975cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 976cbf031f4SNicholas Bellinger */ 977cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 978cbf031f4SNicholas Bellinger /* 979cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 980cbf031f4SNicholas Bellinger */ 981cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 982cbf031f4SNicholas Bellinger /* 983cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 984cbf031f4SNicholas Bellinger */ 985cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 986cbf031f4SNicholas Bellinger /* 987cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 988cbf031f4SNicholas Bellinger */ 989cbf031f4SNicholas Bellinger p[43] = 0x2; 990cbf031f4SNicholas Bellinger /* 991cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 992cbf031f4SNicholas Bellinger */ 993cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 994cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 995cbf031f4SNicholas Bellinger 996cbf031f4SNicholas Bellinger /* 997cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 998cbf031f4SNicholas Bellinger */ 999cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1000cbf031f4SNicholas Bellinger 1001cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1002cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1003cbf031f4SNicholas Bellinger 1004cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1005cbf031f4SNicholas Bellinger } 1006cbf031f4SNicholas Bellinger 1007cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1008cbf031f4SNicholas Bellinger { 1009cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1010cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1011cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1012cbf031f4SNicholas Bellinger 1013cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1014cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1015cbf031f4SNicholas Bellinger 1016cbf031f4SNicholas Bellinger if (list_id != 0) { 1017cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1018cbf031f4SNicholas Bellinger " not supported\n"); 1019cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1020cbf031f4SNicholas Bellinger } 1021cbf031f4SNicholas Bellinger 1022cbf031f4SNicholas Bellinger switch (sa) { 1023cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1024cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1025cbf031f4SNicholas Bellinger break; 1026cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1027cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1028cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1029cbf031f4SNicholas Bellinger default: 1030cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1031cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1032cbf031f4SNicholas Bellinger } 1033cbf031f4SNicholas Bellinger 1034cbf031f4SNicholas Bellinger return rc; 1035cbf031f4SNicholas Bellinger } 1036