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 #include <target/target_core_configfs.h> 36cbf031f4SNicholas Bellinger 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 * From target_core_spc.c 44cbf031f4SNicholas Bellinger */ 45cbf031f4SNicholas Bellinger extern void spc_parse_naa_6h_vendor_specific(struct se_device *, unsigned char *); 46cbf031f4SNicholas Bellinger /* 47cbf031f4SNicholas Bellinger * From target_core_device.c 48cbf031f4SNicholas Bellinger */ 49cbf031f4SNicholas Bellinger extern struct mutex g_device_mutex; 50cbf031f4SNicholas Bellinger extern struct list_head g_device_list; 51cbf031f4SNicholas Bellinger /* 52cbf031f4SNicholas Bellinger * From target_core_configfs.c 53cbf031f4SNicholas Bellinger */ 54cbf031f4SNicholas Bellinger extern struct configfs_subsystem *target_core_subsystem[]; 55cbf031f4SNicholas Bellinger 56cbf031f4SNicholas Bellinger static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) 57cbf031f4SNicholas Bellinger { 58cbf031f4SNicholas Bellinger int off = 0; 59cbf031f4SNicholas Bellinger 60cbf031f4SNicholas Bellinger buf[off++] = (0x6 << 4); 61cbf031f4SNicholas Bellinger buf[off++] = 0x01; 62cbf031f4SNicholas Bellinger buf[off++] = 0x40; 63cbf031f4SNicholas Bellinger buf[off] = (0x5 << 4); 64cbf031f4SNicholas Bellinger 65cbf031f4SNicholas Bellinger spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 66cbf031f4SNicholas Bellinger return 0; 67cbf031f4SNicholas Bellinger } 68cbf031f4SNicholas Bellinger 69cbf031f4SNicholas Bellinger static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 70cbf031f4SNicholas Bellinger bool src) 71cbf031f4SNicholas Bellinger { 72cbf031f4SNicholas Bellinger struct se_device *se_dev; 73cbf031f4SNicholas Bellinger struct configfs_subsystem *subsys = target_core_subsystem[0]; 74cbf031f4SNicholas Bellinger unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; 75cbf031f4SNicholas Bellinger int rc; 76cbf031f4SNicholas Bellinger 77cbf031f4SNicholas Bellinger if (src == true) 78cbf031f4SNicholas Bellinger dev_wwn = &xop->dst_tid_wwn[0]; 79cbf031f4SNicholas Bellinger else 80cbf031f4SNicholas Bellinger dev_wwn = &xop->src_tid_wwn[0]; 81cbf031f4SNicholas Bellinger 82cbf031f4SNicholas Bellinger mutex_lock(&g_device_mutex); 83cbf031f4SNicholas Bellinger list_for_each_entry(se_dev, &g_device_list, g_dev_node) { 84cbf031f4SNicholas Bellinger 85cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 86cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 87cbf031f4SNicholas Bellinger 88cbf031f4SNicholas Bellinger rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 89cbf031f4SNicholas Bellinger if (rc != 0) 90cbf031f4SNicholas Bellinger continue; 91cbf031f4SNicholas Bellinger 92cbf031f4SNicholas Bellinger if (src == true) { 93cbf031f4SNicholas Bellinger xop->dst_dev = se_dev; 94cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" 95cbf031f4SNicholas Bellinger " se_dev\n", xop->dst_dev); 96cbf031f4SNicholas Bellinger } else { 97cbf031f4SNicholas Bellinger xop->src_dev = se_dev; 98cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" 99cbf031f4SNicholas Bellinger " se_dev\n", xop->src_dev); 100cbf031f4SNicholas Bellinger } 101cbf031f4SNicholas Bellinger 102cbf031f4SNicholas Bellinger rc = configfs_depend_item(subsys, 103cbf031f4SNicholas Bellinger &se_dev->dev_group.cg_item); 104cbf031f4SNicholas Bellinger if (rc != 0) { 105cbf031f4SNicholas Bellinger pr_err("configfs_depend_item attempt failed:" 106cbf031f4SNicholas Bellinger " %d for se_dev: %p\n", rc, se_dev); 107cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 108cbf031f4SNicholas Bellinger return rc; 109cbf031f4SNicholas Bellinger } 110cbf031f4SNicholas Bellinger 111cbf031f4SNicholas Bellinger pr_debug("Called configfs_depend_item for subsys: %p se_dev: %p" 112cbf031f4SNicholas Bellinger " se_dev->se_dev_group: %p\n", subsys, se_dev, 113cbf031f4SNicholas Bellinger &se_dev->dev_group); 114cbf031f4SNicholas Bellinger 115cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 116cbf031f4SNicholas Bellinger return 0; 117cbf031f4SNicholas Bellinger } 118cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 119cbf031f4SNicholas Bellinger 120cbf031f4SNicholas Bellinger pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 121cbf031f4SNicholas Bellinger return -EINVAL; 122cbf031f4SNicholas Bellinger } 123cbf031f4SNicholas Bellinger 124cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 125cbf031f4SNicholas Bellinger unsigned char *p, bool src) 126cbf031f4SNicholas Bellinger { 127cbf031f4SNicholas Bellinger unsigned char *desc = p; 128cbf031f4SNicholas Bellinger unsigned short ript; 129cbf031f4SNicholas Bellinger u8 desig_len; 130cbf031f4SNicholas Bellinger /* 131cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 132cbf031f4SNicholas Bellinger */ 133cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 134cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 135cbf031f4SNicholas Bellinger /* 136cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 137cbf031f4SNicholas Bellinger */ 138cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 139cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 140cbf031f4SNicholas Bellinger return -EINVAL; 141cbf031f4SNicholas Bellinger } 142cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 143cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 144cbf031f4SNicholas Bellinger return -EINVAL; 145cbf031f4SNicholas Bellinger } 146cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 147cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 148cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 149cbf031f4SNicholas Bellinger return -EINVAL; 150cbf031f4SNicholas Bellinger } 151cbf031f4SNicholas Bellinger /* 152cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 153cbf031f4SNicholas Bellinger * Assigned designator 154cbf031f4SNicholas Bellinger */ 155cbf031f4SNicholas Bellinger desig_len = desc[7]; 156cbf031f4SNicholas Bellinger if (desig_len != 16) { 157cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 158cbf031f4SNicholas Bellinger return -EINVAL; 159cbf031f4SNicholas Bellinger } 160cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 161cbf031f4SNicholas Bellinger /* 162cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 163cbf031f4SNicholas Bellinger */ 164cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 165cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 166cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 167cbf031f4SNicholas Bellinger return -EINVAL; 168cbf031f4SNicholas Bellinger } 169cbf031f4SNicholas Bellinger 170cbf031f4SNicholas Bellinger if (src == true) { 171cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 172cbf031f4SNicholas Bellinger /* 173cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 174cbf031f4SNicholas Bellinger */ 175cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 176cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 177cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 178cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 179cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 180cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 181cbf031f4SNicholas Bellinger } 182cbf031f4SNicholas Bellinger } else { 183cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 184cbf031f4SNicholas Bellinger /* 185cbf031f4SNicholas Bellinger * Determine if the destination designator matches the local device 186cbf031f4SNicholas Bellinger */ 187cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 188cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 189cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 190cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 191cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 192cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 193cbf031f4SNicholas Bellinger } 194cbf031f4SNicholas Bellinger } 195cbf031f4SNicholas Bellinger 196cbf031f4SNicholas Bellinger return 0; 197cbf031f4SNicholas Bellinger } 198cbf031f4SNicholas Bellinger 199cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 200cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 201cbf031f4SNicholas Bellinger unsigned short tdll) 202cbf031f4SNicholas Bellinger { 203cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 204cbf031f4SNicholas Bellinger unsigned char *desc = p; 205cbf031f4SNicholas Bellinger int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; 206cbf031f4SNicholas Bellinger unsigned short start = 0; 207cbf031f4SNicholas Bellinger bool src = true; 208cbf031f4SNicholas Bellinger 209cbf031f4SNicholas Bellinger if (offset != 0) { 210cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 211cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 212cbf031f4SNicholas Bellinger return -EINVAL; 213cbf031f4SNicholas Bellinger } 214cbf031f4SNicholas Bellinger if (tdll > 64) { 215cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 216cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 217cbf031f4SNicholas Bellinger return -EINVAL; 218cbf031f4SNicholas Bellinger } 219cbf031f4SNicholas Bellinger /* 220cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 221cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 222cbf031f4SNicholas Bellinger */ 223cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 224cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 225cbf031f4SNicholas Bellinger 226cbf031f4SNicholas Bellinger while (start < tdll) { 227cbf031f4SNicholas Bellinger /* 228cbf031f4SNicholas Bellinger * Check target descriptor identification with 0xE4 type with 229cbf031f4SNicholas Bellinger * use VPD 0x83 WWPN matching .. 230cbf031f4SNicholas Bellinger */ 231cbf031f4SNicholas Bellinger switch (desc[0]) { 232cbf031f4SNicholas Bellinger case 0xe4: 233cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 234cbf031f4SNicholas Bellinger &desc[0], src); 235cbf031f4SNicholas Bellinger if (rc != 0) 236cbf031f4SNicholas Bellinger goto out; 237cbf031f4SNicholas Bellinger /* 238cbf031f4SNicholas Bellinger * Assume target descriptors are in source -> destination order.. 239cbf031f4SNicholas Bellinger */ 240cbf031f4SNicholas Bellinger if (src == true) 241cbf031f4SNicholas Bellinger src = false; 242cbf031f4SNicholas Bellinger else 243cbf031f4SNicholas Bellinger src = true; 244cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 245cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 246cbf031f4SNicholas Bellinger ret++; 247cbf031f4SNicholas Bellinger break; 248cbf031f4SNicholas Bellinger default: 249cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 250cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 251cbf031f4SNicholas Bellinger goto out; 252cbf031f4SNicholas Bellinger } 253cbf031f4SNicholas Bellinger } 254cbf031f4SNicholas Bellinger 255cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 256cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); 257cbf031f4SNicholas Bellinger else 258cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); 259cbf031f4SNicholas Bellinger 260cbf031f4SNicholas Bellinger if (rc < 0) 261cbf031f4SNicholas Bellinger goto out; 262cbf031f4SNicholas Bellinger 263cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 264cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 265cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 266cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 267cbf031f4SNicholas Bellinger 268cbf031f4SNicholas Bellinger return ret; 269cbf031f4SNicholas Bellinger 270cbf031f4SNicholas Bellinger out: 271cbf031f4SNicholas Bellinger return -EINVAL; 272cbf031f4SNicholas Bellinger } 273cbf031f4SNicholas Bellinger 274cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 275cbf031f4SNicholas Bellinger unsigned char *p) 276cbf031f4SNicholas Bellinger { 277cbf031f4SNicholas Bellinger unsigned char *desc = p; 278cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 279cbf031f4SNicholas Bellinger unsigned short desc_len; 280cbf031f4SNicholas Bellinger 281cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 282cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 283cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 284cbf031f4SNicholas Bellinger " %hu\n", desc_len); 285cbf031f4SNicholas Bellinger return -EINVAL; 286cbf031f4SNicholas Bellinger } 287cbf031f4SNicholas Bellinger 288cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 289cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 290cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 291cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 292cbf031f4SNicholas Bellinger 293cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 294cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 295cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 296cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 297cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 298cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 299cbf031f4SNicholas Bellinger 300cbf031f4SNicholas Bellinger if (dc != 0) { 3013e9e01deSNicholas Bellinger xop->dbl = (desc[29] & 0xff) << 16; 3023e9e01deSNicholas Bellinger xop->dbl |= (desc[30] & 0xff) << 8; 303cbf031f4SNicholas Bellinger xop->dbl |= desc[31] & 0xff; 304cbf031f4SNicholas Bellinger 305cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 306cbf031f4SNicholas Bellinger } 307cbf031f4SNicholas Bellinger return 0; 308cbf031f4SNicholas Bellinger } 309cbf031f4SNicholas Bellinger 310cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 311cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 312cbf031f4SNicholas Bellinger unsigned int sdll) 313cbf031f4SNicholas Bellinger { 314cbf031f4SNicholas Bellinger unsigned char *desc = p; 315cbf031f4SNicholas Bellinger unsigned int start = 0; 316cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 317cbf031f4SNicholas Bellinger 318cbf031f4SNicholas Bellinger if (offset != 0) { 319cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 320cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 321cbf031f4SNicholas Bellinger return -EINVAL; 322cbf031f4SNicholas Bellinger } 323cbf031f4SNicholas Bellinger 324cbf031f4SNicholas Bellinger while (start < sdll) { 325cbf031f4SNicholas Bellinger /* 326cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 327cbf031f4SNicholas Bellinger */ 328cbf031f4SNicholas Bellinger switch (desc[0]) { 329cbf031f4SNicholas Bellinger case 0x02: 330cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 331cbf031f4SNicholas Bellinger if (rc < 0) 332cbf031f4SNicholas Bellinger goto out; 333cbf031f4SNicholas Bellinger 334cbf031f4SNicholas Bellinger ret++; 335cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 336cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 337cbf031f4SNicholas Bellinger break; 338cbf031f4SNicholas Bellinger default: 339cbf031f4SNicholas Bellinger pr_err("XCOPY unspported segment descriptor" 340cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 341cbf031f4SNicholas Bellinger goto out; 342cbf031f4SNicholas Bellinger } 343cbf031f4SNicholas Bellinger } 344cbf031f4SNicholas Bellinger 345cbf031f4SNicholas Bellinger return ret; 346cbf031f4SNicholas Bellinger 347cbf031f4SNicholas Bellinger out: 348cbf031f4SNicholas Bellinger return -EINVAL; 349cbf031f4SNicholas Bellinger } 350cbf031f4SNicholas Bellinger 351cbf031f4SNicholas Bellinger /* 352cbf031f4SNicholas Bellinger * Start xcopy_pt ops 353cbf031f4SNicholas Bellinger */ 354cbf031f4SNicholas Bellinger 355cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 356cbf031f4SNicholas Bellinger bool remote_port; 357cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 358cbf031f4SNicholas Bellinger struct xcopy_op *xcopy_op; 359cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 360cbf031f4SNicholas Bellinger }; 361cbf031f4SNicholas Bellinger 362cbf031f4SNicholas Bellinger static struct se_port xcopy_pt_port; 363cbf031f4SNicholas Bellinger static struct se_portal_group xcopy_pt_tpg; 364cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 365cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 366cbf031f4SNicholas Bellinger 367cbf031f4SNicholas Bellinger static char *xcopy_pt_get_fabric_name(void) 368cbf031f4SNicholas Bellinger { 369cbf031f4SNicholas Bellinger return "xcopy-pt"; 370cbf031f4SNicholas Bellinger } 371cbf031f4SNicholas Bellinger 372cbf031f4SNicholas Bellinger static u32 xcopy_pt_get_tag(struct se_cmd *se_cmd) 373cbf031f4SNicholas Bellinger { 374cbf031f4SNicholas Bellinger return 0; 375cbf031f4SNicholas Bellinger } 376cbf031f4SNicholas Bellinger 377cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 378cbf031f4SNicholas Bellinger { 379cbf031f4SNicholas Bellinger return 0; 380cbf031f4SNicholas Bellinger } 381cbf031f4SNicholas Bellinger 382cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 383cbf031f4SNicholas Bellinger { 384cbf031f4SNicholas Bellinger struct configfs_subsystem *subsys = target_core_subsystem[0]; 385cbf031f4SNicholas Bellinger struct se_device *remote_dev; 386cbf031f4SNicholas Bellinger 387cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 388cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 389cbf031f4SNicholas Bellinger else 390cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 391cbf031f4SNicholas Bellinger 392cbf031f4SNicholas Bellinger pr_debug("Calling configfs_undepend_item for subsys: %p" 393cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 394cbf031f4SNicholas Bellinger subsys, remote_dev, &remote_dev->dev_group.cg_item); 395cbf031f4SNicholas Bellinger 396cbf031f4SNicholas Bellinger configfs_undepend_item(subsys, &remote_dev->dev_group.cg_item); 397cbf031f4SNicholas Bellinger } 398cbf031f4SNicholas Bellinger 399cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 400cbf031f4SNicholas Bellinger { 401cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 402cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 403cbf031f4SNicholas Bellinger 404cbf031f4SNicholas Bellinger if (xpt_cmd->remote_port) 405cbf031f4SNicholas Bellinger kfree(se_cmd->se_lun); 406cbf031f4SNicholas Bellinger 407cbf031f4SNicholas Bellinger kfree(xpt_cmd); 408cbf031f4SNicholas Bellinger } 409cbf031f4SNicholas Bellinger 410cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 411cbf031f4SNicholas Bellinger { 412cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 413cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 414cbf031f4SNicholas Bellinger 415cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 416cbf031f4SNicholas Bellinger return 0; 417cbf031f4SNicholas Bellinger } 418cbf031f4SNicholas Bellinger 419cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 420cbf031f4SNicholas Bellinger { 421cbf031f4SNicholas Bellinger return 0; 422cbf031f4SNicholas Bellinger } 423cbf031f4SNicholas Bellinger 424cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) 425cbf031f4SNicholas Bellinger { 426cbf031f4SNicholas Bellinger return 0; 427cbf031f4SNicholas Bellinger } 428cbf031f4SNicholas Bellinger 429cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 430cbf031f4SNicholas Bellinger { 431cbf031f4SNicholas Bellinger return 0; 432cbf031f4SNicholas Bellinger } 433cbf031f4SNicholas Bellinger 434cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 435cbf031f4SNicholas Bellinger { 436cbf031f4SNicholas Bellinger return 0; 437cbf031f4SNicholas Bellinger } 438cbf031f4SNicholas Bellinger 439cbf031f4SNicholas Bellinger static struct target_core_fabric_ops xcopy_pt_tfo = { 440cbf031f4SNicholas Bellinger .get_fabric_name = xcopy_pt_get_fabric_name, 441cbf031f4SNicholas Bellinger .get_task_tag = xcopy_pt_get_tag, 442cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 443cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 444cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 445cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 446cbf031f4SNicholas Bellinger .write_pending_status = xcopy_pt_write_pending_status, 447cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 448cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 449cbf031f4SNicholas Bellinger }; 450cbf031f4SNicholas Bellinger 451cbf031f4SNicholas Bellinger /* 452cbf031f4SNicholas Bellinger * End xcopy_pt_ops 453cbf031f4SNicholas Bellinger */ 454cbf031f4SNicholas Bellinger 455cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 456cbf031f4SNicholas Bellinger { 457cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 458cbf031f4SNicholas Bellinger if (!xcopy_wq) { 459cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 460cbf031f4SNicholas Bellinger return -ENOMEM; 461cbf031f4SNicholas Bellinger } 462cbf031f4SNicholas Bellinger 463cbf031f4SNicholas Bellinger memset(&xcopy_pt_port, 0, sizeof(struct se_port)); 464cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); 465cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_port.sep_list); 466cbf031f4SNicholas Bellinger mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); 467cbf031f4SNicholas Bellinger 468cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 469cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); 470cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 471cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 472cbf031f4SNicholas Bellinger 473cbf031f4SNicholas Bellinger xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; 474cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 475cbf031f4SNicholas Bellinger 476cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 477cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 478cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 479cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 480cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); 481cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); 482cbf031f4SNicholas Bellinger 483cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 484cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 485cbf031f4SNicholas Bellinger 486cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 487cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 488cbf031f4SNicholas Bellinger 489cbf031f4SNicholas Bellinger return 0; 490cbf031f4SNicholas Bellinger } 491cbf031f4SNicholas Bellinger 492cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 493cbf031f4SNicholas Bellinger { 494cbf031f4SNicholas Bellinger if (xcopy_wq) 495cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 496cbf031f4SNicholas Bellinger } 497cbf031f4SNicholas Bellinger 498cbf031f4SNicholas Bellinger static void target_xcopy_setup_pt_port( 499cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 500cbf031f4SNicholas Bellinger struct xcopy_op *xop, 501cbf031f4SNicholas Bellinger bool remote_port) 502cbf031f4SNicholas Bellinger { 503cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 504cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; 505cbf031f4SNicholas Bellinger 506cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) { 507cbf031f4SNicholas Bellinger /* 508cbf031f4SNicholas Bellinger * Honor destination port reservations for X-COPY PUSH emulation 509cbf031f4SNicholas Bellinger * when CDB is received on local source port, and READs blocks to 510cbf031f4SNicholas Bellinger * WRITE on remote destination port. 511cbf031f4SNicholas Bellinger */ 512cbf031f4SNicholas Bellinger if (remote_port) { 513cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 514cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep = &xcopy_pt_port; 515cbf031f4SNicholas Bellinger pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" 516cbf031f4SNicholas Bellinger " cmd->se_lun->lun_sep for X-COPY data PUSH\n", 517cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep); 518cbf031f4SNicholas Bellinger } else { 519cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 520cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 521cbf031f4SNicholas Bellinger 522cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_dev:" 523cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 524cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 525cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", 526cbf031f4SNicholas Bellinger pt_cmd->se_lun); 527cbf031f4SNicholas Bellinger } 528cbf031f4SNicholas Bellinger } else { 529cbf031f4SNicholas Bellinger /* 530cbf031f4SNicholas Bellinger * Honor source port reservation for X-COPY PULL emulation 531cbf031f4SNicholas Bellinger * when CDB is received on local desintation port, and READs 532cbf031f4SNicholas Bellinger * blocks from the remote source port to WRITE on local 533cbf031f4SNicholas Bellinger * destination port. 534cbf031f4SNicholas Bellinger */ 535cbf031f4SNicholas Bellinger if (remote_port) { 536cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 537cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep = &xcopy_pt_port; 538cbf031f4SNicholas Bellinger pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" 539cbf031f4SNicholas Bellinger " cmd->se_lun->lun_sep for X-COPY data PULL\n", 540cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep); 541cbf031f4SNicholas Bellinger } else { 542cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 543cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 544cbf031f4SNicholas Bellinger 545cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_dev:" 546cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 547cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 548cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", 549cbf031f4SNicholas Bellinger pt_cmd->se_lun); 550cbf031f4SNicholas Bellinger } 551cbf031f4SNicholas Bellinger } 552cbf031f4SNicholas Bellinger } 553cbf031f4SNicholas Bellinger 554cbf031f4SNicholas Bellinger static int target_xcopy_init_pt_lun( 555cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 556cbf031f4SNicholas Bellinger struct xcopy_op *xop, 557cbf031f4SNicholas Bellinger struct se_device *se_dev, 558cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd, 559cbf031f4SNicholas Bellinger bool remote_port) 560cbf031f4SNicholas Bellinger { 561cbf031f4SNicholas Bellinger /* 562cbf031f4SNicholas Bellinger * Don't allocate + init an pt_cmd->se_lun if honoring local port for 563cbf031f4SNicholas Bellinger * reservations. The pt_cmd->se_lun pointer will be setup from within 564cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_port() 565cbf031f4SNicholas Bellinger */ 566cbf031f4SNicholas Bellinger if (remote_port == false) { 567cbf031f4SNicholas Bellinger pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; 568cbf031f4SNicholas Bellinger return 0; 569cbf031f4SNicholas Bellinger } 570cbf031f4SNicholas Bellinger 571cbf031f4SNicholas Bellinger pt_cmd->se_lun = kzalloc(sizeof(struct se_lun), GFP_KERNEL); 572cbf031f4SNicholas Bellinger if (!pt_cmd->se_lun) { 573cbf031f4SNicholas Bellinger pr_err("Unable to allocate pt_cmd->se_lun\n"); 574cbf031f4SNicholas Bellinger return -ENOMEM; 575cbf031f4SNicholas Bellinger } 576cbf031f4SNicholas Bellinger init_completion(&pt_cmd->se_lun->lun_shutdown_comp); 577cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&pt_cmd->se_lun->lun_cmd_list); 578cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&pt_cmd->se_lun->lun_acl_list); 579cbf031f4SNicholas Bellinger spin_lock_init(&pt_cmd->se_lun->lun_acl_lock); 580cbf031f4SNicholas Bellinger spin_lock_init(&pt_cmd->se_lun->lun_cmd_lock); 581cbf031f4SNicholas Bellinger spin_lock_init(&pt_cmd->se_lun->lun_sep_lock); 582cbf031f4SNicholas Bellinger 583cbf031f4SNicholas Bellinger pt_cmd->se_dev = se_dev; 584cbf031f4SNicholas Bellinger 585cbf031f4SNicholas Bellinger pr_debug("Setup emulated se_dev: %p from se_dev\n", pt_cmd->se_dev); 586cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_se_dev = se_dev; 587cbf031f4SNicholas Bellinger pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; 588cbf031f4SNicholas Bellinger 589cbf031f4SNicholas Bellinger pr_debug("Setup emulated se_dev: %p to pt_cmd->se_lun->lun_se_dev\n", 590cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_se_dev); 591cbf031f4SNicholas Bellinger 592cbf031f4SNicholas Bellinger return 0; 593cbf031f4SNicholas Bellinger } 594cbf031f4SNicholas Bellinger 595cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 596cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 597cbf031f4SNicholas Bellinger struct xcopy_op *xop, 598cbf031f4SNicholas Bellinger struct se_device *se_dev, 599cbf031f4SNicholas Bellinger unsigned char *cdb, 600cbf031f4SNicholas Bellinger bool remote_port, 601cbf031f4SNicholas Bellinger bool alloc_mem) 602cbf031f4SNicholas Bellinger { 603cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 604cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 605cbf031f4SNicholas Bellinger int ret = 0, rc; 606cbf031f4SNicholas Bellinger /* 607cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 608cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 609cbf031f4SNicholas Bellinger */ 610cbf031f4SNicholas Bellinger rc = target_xcopy_init_pt_lun(xpt_cmd, xop, se_dev, cmd, remote_port); 611cbf031f4SNicholas Bellinger if (rc < 0) { 612cbf031f4SNicholas Bellinger ret = rc; 613cbf031f4SNicholas Bellinger goto out; 614cbf031f4SNicholas Bellinger } 615cbf031f4SNicholas Bellinger xpt_cmd->xcopy_op = xop; 616cbf031f4SNicholas Bellinger target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); 617cbf031f4SNicholas Bellinger 618cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 619cbf031f4SNicholas Bellinger if (sense_rc) { 620cbf031f4SNicholas Bellinger ret = -EINVAL; 621cbf031f4SNicholas Bellinger goto out; 622cbf031f4SNicholas Bellinger } 623cbf031f4SNicholas Bellinger 624cbf031f4SNicholas Bellinger if (alloc_mem) { 625cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 626cbf031f4SNicholas Bellinger cmd->data_length, false); 627cbf031f4SNicholas Bellinger if (rc < 0) { 628cbf031f4SNicholas Bellinger ret = rc; 629cbf031f4SNicholas Bellinger goto out; 630cbf031f4SNicholas Bellinger } 631cbf031f4SNicholas Bellinger /* 632cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 633cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 634cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 635cbf031f4SNicholas Bellinger */ 636cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 637cbf031f4SNicholas Bellinger } else { 638cbf031f4SNicholas Bellinger /* 639cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 640cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 641cbf031f4SNicholas Bellinger */ 642cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 643cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 644cbf031f4SNicholas Bellinger NULL, 0); 645cbf031f4SNicholas Bellinger if (sense_rc) { 646cbf031f4SNicholas Bellinger ret = -EINVAL; 647cbf031f4SNicholas Bellinger goto out; 648cbf031f4SNicholas Bellinger } 649cbf031f4SNicholas Bellinger 650cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 651cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 652cbf031f4SNicholas Bellinger } 653cbf031f4SNicholas Bellinger 654cbf031f4SNicholas Bellinger return 0; 655cbf031f4SNicholas Bellinger 656cbf031f4SNicholas Bellinger out: 657cbf031f4SNicholas Bellinger if (remote_port == true) 658cbf031f4SNicholas Bellinger kfree(cmd->se_lun); 659cbf031f4SNicholas Bellinger return ret; 660cbf031f4SNicholas Bellinger } 661cbf031f4SNicholas Bellinger 662cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 663cbf031f4SNicholas Bellinger { 664cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 665cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 666cbf031f4SNicholas Bellinger 667cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 668cbf031f4SNicholas Bellinger if (sense_rc) 669cbf031f4SNicholas Bellinger return -EINVAL; 670cbf031f4SNicholas Bellinger 671cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 672cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 673cbf031f4SNicholas Bellinger 674cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 675cbf031f4SNicholas Bellinger 676cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 677cbf031f4SNicholas Bellinger se_cmd->scsi_status); 678cbf031f4SNicholas Bellinger return 0; 679cbf031f4SNicholas Bellinger } 680cbf031f4SNicholas Bellinger 681cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 682cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 683cbf031f4SNicholas Bellinger struct xcopy_op *xop, 684cbf031f4SNicholas Bellinger struct se_device *src_dev, 685cbf031f4SNicholas Bellinger sector_t src_lba, 686cbf031f4SNicholas Bellinger u32 src_sectors) 687cbf031f4SNicholas Bellinger { 688cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 689cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 690cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 691cbf031f4SNicholas Bellinger int rc; 692cbf031f4SNicholas Bellinger unsigned char cdb[16]; 693cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 694cbf031f4SNicholas Bellinger 695cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 696cbf031f4SNicholas Bellinger if (!xpt_cmd) { 697cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 698cbf031f4SNicholas Bellinger return -ENOMEM; 699cbf031f4SNicholas Bellinger } 700cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 701cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 702cbf031f4SNicholas Bellinger 703cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 704cbf031f4SNicholas Bellinger cdb[0] = READ_16; 705cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 706cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 707cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 708cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 709cbf031f4SNicholas Bellinger 710cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 711cbf031f4SNicholas Bellinger DMA_FROM_DEVICE, 0, NULL); 712cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 713cbf031f4SNicholas Bellinger 714cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 715cbf031f4SNicholas Bellinger remote_port, true); 716cbf031f4SNicholas Bellinger if (rc < 0) { 717cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 718cbf031f4SNicholas Bellinger return rc; 719cbf031f4SNicholas Bellinger } 720cbf031f4SNicholas Bellinger 721cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 722cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 723cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 724cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 725cbf031f4SNicholas Bellinger 726cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 727cbf031f4SNicholas Bellinger if (rc < 0) { 728cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 729cbf031f4SNicholas Bellinger return rc; 730cbf031f4SNicholas Bellinger } 731cbf031f4SNicholas Bellinger /* 732cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 733cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 734cbf031f4SNicholas Bellinger */ 735cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 736cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 737cbf031f4SNicholas Bellinger 738cbf031f4SNicholas Bellinger return 0; 739cbf031f4SNicholas Bellinger } 740cbf031f4SNicholas Bellinger 741cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 742cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 743cbf031f4SNicholas Bellinger struct xcopy_op *xop, 744cbf031f4SNicholas Bellinger struct se_device *dst_dev, 745cbf031f4SNicholas Bellinger sector_t dst_lba, 746cbf031f4SNicholas Bellinger u32 dst_sectors) 747cbf031f4SNicholas Bellinger { 748cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 749cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 750cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 751cbf031f4SNicholas Bellinger int rc; 752cbf031f4SNicholas Bellinger unsigned char cdb[16]; 753cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 754cbf031f4SNicholas Bellinger 755cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 756cbf031f4SNicholas Bellinger if (!xpt_cmd) { 757cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 758cbf031f4SNicholas Bellinger return -ENOMEM; 759cbf031f4SNicholas Bellinger } 760cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 761cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 762cbf031f4SNicholas Bellinger 763cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 764cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 765cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 766cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 767cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 768cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 769cbf031f4SNicholas Bellinger 770cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 771cbf031f4SNicholas Bellinger DMA_TO_DEVICE, 0, NULL); 772cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 773cbf031f4SNicholas Bellinger 774cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 775cbf031f4SNicholas Bellinger remote_port, false); 776cbf031f4SNicholas Bellinger if (rc < 0) { 777cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 778cbf031f4SNicholas Bellinger /* 779cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 780cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 781cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 782cbf031f4SNicholas Bellinger */ 783cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 784cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 785cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 786cbf031f4SNicholas Bellinger 787cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 788cbf031f4SNicholas Bellinger return rc; 789cbf031f4SNicholas Bellinger } 790cbf031f4SNicholas Bellinger 791cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 792cbf031f4SNicholas Bellinger if (rc < 0) { 793cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 794cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 795cbf031f4SNicholas Bellinger return rc; 796cbf031f4SNicholas Bellinger } 797cbf031f4SNicholas Bellinger 798cbf031f4SNicholas Bellinger return 0; 799cbf031f4SNicholas Bellinger } 800cbf031f4SNicholas Bellinger 801cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 802cbf031f4SNicholas Bellinger { 803cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 804cbf031f4SNicholas Bellinger struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; 805cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 806cbf031f4SNicholas Bellinger sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; 807cbf031f4SNicholas Bellinger unsigned int max_sectors; 808cbf031f4SNicholas Bellinger int rc; 809cbf031f4SNicholas Bellinger unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; 810cbf031f4SNicholas Bellinger 811cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 812cbf031f4SNicholas Bellinger /* 813cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 814cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 815cbf031f4SNicholas Bellinger */ 816cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 817cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 818cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 819cbf031f4SNicholas Bellinger 820cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 821cbf031f4SNicholas Bellinger 822cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 823cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 824cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 825cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 826cbf031f4SNicholas Bellinger 827cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 828cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 829cbf031f4SNicholas Bellinger 830cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 831cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 832cbf031f4SNicholas Bellinger 833cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 834cbf031f4SNicholas Bellinger if (rc < 0) 835cbf031f4SNicholas Bellinger goto out; 836cbf031f4SNicholas Bellinger 837cbf031f4SNicholas Bellinger src_lba += cur_nolb; 838cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 839cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 840cbf031f4SNicholas Bellinger 841cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 842cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 843cbf031f4SNicholas Bellinger 844cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 845cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 846cbf031f4SNicholas Bellinger if (rc < 0) { 847cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 848cbf031f4SNicholas Bellinger goto out; 849cbf031f4SNicholas Bellinger } 850cbf031f4SNicholas Bellinger 851cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 852cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 853cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 854cbf031f4SNicholas Bellinger 855cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 856cbf031f4SNicholas Bellinger nolb -= cur_nolb; 857cbf031f4SNicholas Bellinger 858cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 859cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 860cbf031f4SNicholas Bellinger 861cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 862cbf031f4SNicholas Bellinger } 863cbf031f4SNicholas Bellinger 864cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 865cbf031f4SNicholas Bellinger kfree(xop); 866cbf031f4SNicholas Bellinger 867cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 868cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 869cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 870cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 871cbf031f4SNicholas Bellinger 872cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 873cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 874cbf031f4SNicholas Bellinger return; 875cbf031f4SNicholas Bellinger 876cbf031f4SNicholas Bellinger out: 877cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 878cbf031f4SNicholas Bellinger kfree(xop); 879cbf031f4SNicholas Bellinger 880cbf031f4SNicholas Bellinger pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); 881cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 882cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); 883cbf031f4SNicholas Bellinger } 884cbf031f4SNicholas Bellinger 885cbf031f4SNicholas Bellinger sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 886cbf031f4SNicholas Bellinger { 887cbf031f4SNicholas Bellinger struct xcopy_op *xop = NULL; 888cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 889cbf031f4SNicholas Bellinger unsigned int list_id, list_id_usage, sdll, inline_dl, sa; 890cbf031f4SNicholas Bellinger int rc; 891cbf031f4SNicholas Bellinger unsigned short tdll; 892cbf031f4SNicholas Bellinger 893cbf031f4SNicholas Bellinger sa = se_cmd->t_task_cdb[1] & 0x1f; 894cbf031f4SNicholas Bellinger if (sa != 0x00) { 895cbf031f4SNicholas Bellinger pr_err("EXTENDED_COPY(LID4) not supported\n"); 896cbf031f4SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 897cbf031f4SNicholas Bellinger } 898cbf031f4SNicholas Bellinger 899934a138eSNicholas Bellinger xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 900934a138eSNicholas Bellinger if (!xop) { 901934a138eSNicholas Bellinger pr_err("Unable to allocate xcopy_op\n"); 902934a138eSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 903934a138eSNicholas Bellinger } 904934a138eSNicholas Bellinger xop->xop_se_cmd = se_cmd; 905934a138eSNicholas Bellinger 906cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 907cbf031f4SNicholas Bellinger if (!p) { 908cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 909934a138eSNicholas Bellinger kfree(xop); 910cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 911cbf031f4SNicholas Bellinger } 912cbf031f4SNicholas Bellinger 913cbf031f4SNicholas Bellinger list_id = p[0]; 914cbf031f4SNicholas Bellinger if (list_id != 0x00) { 915cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero list_id: 0x%02x\n", list_id); 916cbf031f4SNicholas Bellinger goto out; 917cbf031f4SNicholas Bellinger } 918cbf031f4SNicholas Bellinger list_id_usage = (p[1] & 0x18); 919cbf031f4SNicholas Bellinger /* 920cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 921cbf031f4SNicholas Bellinger */ 922cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 923cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 924cbf031f4SNicholas Bellinger 925cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 926cbf031f4SNicholas Bellinger if (inline_dl != 0) { 927cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 928cbf031f4SNicholas Bellinger goto out; 929cbf031f4SNicholas Bellinger } 930cbf031f4SNicholas Bellinger 931cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 932cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 933cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 934cbf031f4SNicholas Bellinger 935cbf031f4SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); 936cbf031f4SNicholas Bellinger if (rc <= 0) 937cbf031f4SNicholas Bellinger goto out; 938cbf031f4SNicholas Bellinger 939cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 940cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 941cbf031f4SNicholas Bellinger seg_desc = &p[16]; 942cbf031f4SNicholas Bellinger seg_desc += (rc * XCOPY_TARGET_DESC_LEN); 943cbf031f4SNicholas Bellinger 944cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); 945cbf031f4SNicholas Bellinger if (rc <= 0) { 946cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 947cbf031f4SNicholas Bellinger goto out; 948cbf031f4SNicholas Bellinger } 949cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 950cbf031f4SNicholas Bellinger 951cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 952cbf031f4SNicholas Bellinger rc * XCOPY_SEGMENT_DESC_LEN); 953cbf031f4SNicholas Bellinger INIT_WORK(&xop->xop_work, target_xcopy_do_work); 954cbf031f4SNicholas Bellinger queue_work(xcopy_wq, &xop->xop_work); 955cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 956cbf031f4SNicholas Bellinger 957cbf031f4SNicholas Bellinger out: 958cbf031f4SNicholas Bellinger if (p) 959cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 960cbf031f4SNicholas Bellinger kfree(xop); 961934a138eSNicholas Bellinger return TCM_INVALID_PARAMETER_LIST; 962cbf031f4SNicholas Bellinger } 963cbf031f4SNicholas Bellinger 964cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 965cbf031f4SNicholas Bellinger { 966cbf031f4SNicholas Bellinger unsigned char *p; 967cbf031f4SNicholas Bellinger 968cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 969cbf031f4SNicholas Bellinger if (!p) { 970cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 971cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 972cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 973cbf031f4SNicholas Bellinger } 974cbf031f4SNicholas Bellinger 975cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 976cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 977cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 978cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 979cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 980cbf031f4SNicholas Bellinger } 981cbf031f4SNicholas Bellinger /* 982cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 983cbf031f4SNicholas Bellinger */ 984cbf031f4SNicholas Bellinger p[4] = 0x1; 985cbf031f4SNicholas Bellinger /* 986cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 987cbf031f4SNicholas Bellinger */ 988cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 989cbf031f4SNicholas Bellinger /* 990cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 991cbf031f4SNicholas Bellinger */ 992cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 993cbf031f4SNicholas Bellinger /* 994cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 995cbf031f4SNicholas Bellinger */ 996cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 997cbf031f4SNicholas Bellinger /* 998cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 999cbf031f4SNicholas Bellinger */ 1000cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 1001cbf031f4SNicholas Bellinger /* 1002cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 1003cbf031f4SNicholas Bellinger */ 1004cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 1005cbf031f4SNicholas Bellinger /* 1006cbf031f4SNicholas Bellinger * HELD DATA LIMIT 1007cbf031f4SNicholas Bellinger */ 1008cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 1009cbf031f4SNicholas Bellinger /* 1010cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 1011cbf031f4SNicholas Bellinger */ 1012cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 1013cbf031f4SNicholas Bellinger /* 1014cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 1015cbf031f4SNicholas Bellinger */ 1016cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 1017cbf031f4SNicholas Bellinger /* 1018cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 1019cbf031f4SNicholas Bellinger */ 1020cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 1021cbf031f4SNicholas Bellinger /* 1022cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 1023cbf031f4SNicholas Bellinger */ 1024cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 1025cbf031f4SNicholas Bellinger /* 1026cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 1027cbf031f4SNicholas Bellinger */ 1028cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 1029cbf031f4SNicholas Bellinger /* 1030cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 1031cbf031f4SNicholas Bellinger */ 1032cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 1033cbf031f4SNicholas Bellinger /* 1034cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 1035cbf031f4SNicholas Bellinger */ 1036cbf031f4SNicholas Bellinger p[43] = 0x2; 1037cbf031f4SNicholas Bellinger /* 1038cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 1039cbf031f4SNicholas Bellinger */ 1040cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 1041cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 1042cbf031f4SNicholas Bellinger 1043cbf031f4SNicholas Bellinger /* 1044cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 1045cbf031f4SNicholas Bellinger */ 1046cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1047cbf031f4SNicholas Bellinger 1048cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1049cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1050cbf031f4SNicholas Bellinger 1051cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1052cbf031f4SNicholas Bellinger } 1053cbf031f4SNicholas Bellinger 1054cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1055cbf031f4SNicholas Bellinger { 1056cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1057cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1058cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1059cbf031f4SNicholas Bellinger 1060cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1061cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1062cbf031f4SNicholas Bellinger 1063cbf031f4SNicholas Bellinger if (list_id != 0) { 1064cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1065cbf031f4SNicholas Bellinger " not supported\n"); 1066cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1067cbf031f4SNicholas Bellinger } 1068cbf031f4SNicholas Bellinger 1069cbf031f4SNicholas Bellinger switch (sa) { 1070cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1071cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1072cbf031f4SNicholas Bellinger break; 1073cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1074cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1075cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1076cbf031f4SNicholas Bellinger default: 1077cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1078cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1079cbf031f4SNicholas Bellinger } 1080cbf031f4SNicholas Bellinger 1081cbf031f4SNicholas Bellinger return rc; 1082cbf031f4SNicholas Bellinger } 1083