1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_iblock.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains the Storage Engine <-> Linux BlockIO transport 5c66ac9dbSNicholas Bellinger * specific functions. 6c66ac9dbSNicholas Bellinger * 7c66ac9dbSNicholas Bellinger * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 8c66ac9dbSNicholas Bellinger * Copyright (c) 2005, 2006, 2007 SBE, Inc. 9c66ac9dbSNicholas Bellinger * Copyright (c) 2007-2010 Rising Tide Systems 10c66ac9dbSNicholas Bellinger * Copyright (c) 2008-2010 Linux-iSCSI.org 11c66ac9dbSNicholas Bellinger * 12c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 13c66ac9dbSNicholas Bellinger * 14c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 15c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 16c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 17c66ac9dbSNicholas Bellinger * (at your option) any later version. 18c66ac9dbSNicholas Bellinger * 19c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 20c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 21c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 23c66ac9dbSNicholas Bellinger * 24c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 25c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 26c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 27c66ac9dbSNicholas Bellinger * 28c66ac9dbSNicholas Bellinger ******************************************************************************/ 29c66ac9dbSNicholas Bellinger 30c66ac9dbSNicholas Bellinger #include <linux/string.h> 31c66ac9dbSNicholas Bellinger #include <linux/parser.h> 32c66ac9dbSNicholas Bellinger #include <linux/timer.h> 33c66ac9dbSNicholas Bellinger #include <linux/fs.h> 34c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 35c66ac9dbSNicholas Bellinger #include <linux/slab.h> 36c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 37c66ac9dbSNicholas Bellinger #include <linux/bio.h> 38c66ac9dbSNicholas Bellinger #include <linux/genhd.h> 39c66ac9dbSNicholas Bellinger #include <linux/file.h> 40c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 41c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 44c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 45c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 46c66ac9dbSNicholas Bellinger 47c66ac9dbSNicholas Bellinger #include "target_core_iblock.h" 48c66ac9dbSNicholas Bellinger 49c66ac9dbSNicholas Bellinger static struct se_subsystem_api iblock_template; 50c66ac9dbSNicholas Bellinger 51c66ac9dbSNicholas Bellinger static void iblock_bio_done(struct bio *, int); 52c66ac9dbSNicholas Bellinger 53c66ac9dbSNicholas Bellinger /* iblock_attach_hba(): (Part of se_subsystem_api_t template) 54c66ac9dbSNicholas Bellinger * 55c66ac9dbSNicholas Bellinger * 56c66ac9dbSNicholas Bellinger */ 57c66ac9dbSNicholas Bellinger static int iblock_attach_hba(struct se_hba *hba, u32 host_id) 58c66ac9dbSNicholas Bellinger { 59c66ac9dbSNicholas Bellinger struct iblock_hba *ib_host; 60c66ac9dbSNicholas Bellinger 61c66ac9dbSNicholas Bellinger ib_host = kzalloc(sizeof(struct iblock_hba), GFP_KERNEL); 626708bb27SAndy Grover if (!ib_host) { 636708bb27SAndy Grover pr_err("Unable to allocate memory for" 64c66ac9dbSNicholas Bellinger " struct iblock_hba\n"); 65c66ac9dbSNicholas Bellinger return -ENOMEM; 66c66ac9dbSNicholas Bellinger } 67c66ac9dbSNicholas Bellinger 68c66ac9dbSNicholas Bellinger ib_host->iblock_host_id = host_id; 69c66ac9dbSNicholas Bellinger 705951146dSAndy Grover hba->hba_ptr = ib_host; 71c66ac9dbSNicholas Bellinger 726708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM iBlock HBA Driver %s on" 73c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 74c66ac9dbSNicholas Bellinger IBLOCK_VERSION, TARGET_CORE_MOD_VERSION); 75c66ac9dbSNicholas Bellinger 766708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached iBlock HBA: %u to Generic\n", 77e3d6f909SAndy Grover hba->hba_id, ib_host->iblock_host_id); 78c66ac9dbSNicholas Bellinger 79c66ac9dbSNicholas Bellinger return 0; 80c66ac9dbSNicholas Bellinger } 81c66ac9dbSNicholas Bellinger 82c66ac9dbSNicholas Bellinger static void iblock_detach_hba(struct se_hba *hba) 83c66ac9dbSNicholas Bellinger { 84c66ac9dbSNicholas Bellinger struct iblock_hba *ib_host = hba->hba_ptr; 85c66ac9dbSNicholas Bellinger 866708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached iBlock HBA: %u from Generic" 87c66ac9dbSNicholas Bellinger " Target Core\n", hba->hba_id, ib_host->iblock_host_id); 88c66ac9dbSNicholas Bellinger 89c66ac9dbSNicholas Bellinger kfree(ib_host); 90c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 91c66ac9dbSNicholas Bellinger } 92c66ac9dbSNicholas Bellinger 93c66ac9dbSNicholas Bellinger static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name) 94c66ac9dbSNicholas Bellinger { 95c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = NULL; 96c66ac9dbSNicholas Bellinger struct iblock_hba *ib_host = hba->hba_ptr; 97c66ac9dbSNicholas Bellinger 98c66ac9dbSNicholas Bellinger ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL); 996708bb27SAndy Grover if (!ib_dev) { 1006708bb27SAndy Grover pr_err("Unable to allocate struct iblock_dev\n"); 101c66ac9dbSNicholas Bellinger return NULL; 102c66ac9dbSNicholas Bellinger } 103c66ac9dbSNicholas Bellinger ib_dev->ibd_host = ib_host; 104c66ac9dbSNicholas Bellinger 1056708bb27SAndy Grover pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name); 106c66ac9dbSNicholas Bellinger 107c66ac9dbSNicholas Bellinger return ib_dev; 108c66ac9dbSNicholas Bellinger } 109c66ac9dbSNicholas Bellinger 110c66ac9dbSNicholas Bellinger static struct se_device *iblock_create_virtdevice( 111c66ac9dbSNicholas Bellinger struct se_hba *hba, 112c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 113c66ac9dbSNicholas Bellinger void *p) 114c66ac9dbSNicholas Bellinger { 115c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = p; 116c66ac9dbSNicholas Bellinger struct se_device *dev; 117c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 118c66ac9dbSNicholas Bellinger struct block_device *bd = NULL; 119c66ac9dbSNicholas Bellinger struct request_queue *q; 120c66ac9dbSNicholas Bellinger struct queue_limits *limits; 121c66ac9dbSNicholas Bellinger u32 dev_flags = 0; 122613640e4SNicholas Bellinger int ret = -EINVAL; 123c66ac9dbSNicholas Bellinger 1246708bb27SAndy Grover if (!ib_dev) { 1256708bb27SAndy Grover pr_err("Unable to locate struct iblock_dev parameter\n"); 126613640e4SNicholas Bellinger return ERR_PTR(ret); 127c66ac9dbSNicholas Bellinger } 128c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 129c66ac9dbSNicholas Bellinger /* 130c66ac9dbSNicholas Bellinger * These settings need to be made tunable.. 131c66ac9dbSNicholas Bellinger */ 132c66ac9dbSNicholas Bellinger ib_dev->ibd_bio_set = bioset_create(32, 64); 1336708bb27SAndy Grover if (!ib_dev->ibd_bio_set) { 1346708bb27SAndy Grover pr_err("IBLOCK: Unable to create bioset()\n"); 135613640e4SNicholas Bellinger return ERR_PTR(-ENOMEM); 136c66ac9dbSNicholas Bellinger } 1376708bb27SAndy Grover pr_debug("IBLOCK: Created bio_set()\n"); 138c66ac9dbSNicholas Bellinger /* 139c66ac9dbSNicholas Bellinger * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path 140c66ac9dbSNicholas Bellinger * must already have been set in order for echo 1 > $HBA/$DEV/enable to run. 141c66ac9dbSNicholas Bellinger */ 1426708bb27SAndy Grover pr_debug( "IBLOCK: Claiming struct block_device: %s\n", 143c66ac9dbSNicholas Bellinger ib_dev->ibd_udev_path); 144c66ac9dbSNicholas Bellinger 145c66ac9dbSNicholas Bellinger bd = blkdev_get_by_path(ib_dev->ibd_udev_path, 146c66ac9dbSNicholas Bellinger FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev); 147613640e4SNicholas Bellinger if (IS_ERR(bd)) { 148613640e4SNicholas Bellinger ret = PTR_ERR(bd); 149c66ac9dbSNicholas Bellinger goto failed; 150613640e4SNicholas Bellinger } 151c66ac9dbSNicholas Bellinger /* 152c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 153c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 154c66ac9dbSNicholas Bellinger */ 155c66ac9dbSNicholas Bellinger q = bdev_get_queue(bd); 156c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 157c66ac9dbSNicholas Bellinger limits->logical_block_size = bdev_logical_block_size(bd); 158c66ac9dbSNicholas Bellinger limits->max_hw_sectors = queue_max_hw_sectors(q); 159c66ac9dbSNicholas Bellinger limits->max_sectors = queue_max_sectors(q); 1608f3d14e2SNicholas Bellinger dev_limits.hw_queue_depth = q->nr_requests; 1618f3d14e2SNicholas Bellinger dev_limits.queue_depth = q->nr_requests; 162c66ac9dbSNicholas Bellinger 163c66ac9dbSNicholas Bellinger ib_dev->ibd_bd = bd; 164c66ac9dbSNicholas Bellinger 165c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, 1665951146dSAndy Grover &iblock_template, se_dev, dev_flags, ib_dev, 167c66ac9dbSNicholas Bellinger &dev_limits, "IBLOCK", IBLOCK_VERSION); 1686708bb27SAndy Grover if (!dev) 169c66ac9dbSNicholas Bellinger goto failed; 170c66ac9dbSNicholas Bellinger 171c66ac9dbSNicholas Bellinger /* 172c66ac9dbSNicholas Bellinger * Check if the underlying struct block_device request_queue supports 173c66ac9dbSNicholas Bellinger * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM 174c66ac9dbSNicholas Bellinger * in ATA and we need to set TPE=1 175c66ac9dbSNicholas Bellinger */ 176613640e4SNicholas Bellinger if (blk_queue_discard(q)) { 177e3d6f909SAndy Grover dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = 178c66ac9dbSNicholas Bellinger q->limits.max_discard_sectors; 179c66ac9dbSNicholas Bellinger /* 180c66ac9dbSNicholas Bellinger * Currently hardcoded to 1 in Linux/SCSI code.. 181c66ac9dbSNicholas Bellinger */ 182e3d6f909SAndy Grover dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1; 183e3d6f909SAndy Grover dev->se_sub_dev->se_dev_attrib.unmap_granularity = 184c66ac9dbSNicholas Bellinger q->limits.discard_granularity; 185e3d6f909SAndy Grover dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 186c66ac9dbSNicholas Bellinger q->limits.discard_alignment; 187c66ac9dbSNicholas Bellinger 1886708bb27SAndy Grover pr_debug("IBLOCK: BLOCK Discard support available," 189c66ac9dbSNicholas Bellinger " disabled by default\n"); 190c66ac9dbSNicholas Bellinger } 191c66ac9dbSNicholas Bellinger 192e22a7f07SRoland Dreier if (blk_queue_nonrot(q)) 193e22a7f07SRoland Dreier dev->se_sub_dev->se_dev_attrib.is_nonrot = 1; 194e22a7f07SRoland Dreier 195c66ac9dbSNicholas Bellinger return dev; 196c66ac9dbSNicholas Bellinger 197c66ac9dbSNicholas Bellinger failed: 198c66ac9dbSNicholas Bellinger if (ib_dev->ibd_bio_set) { 199c66ac9dbSNicholas Bellinger bioset_free(ib_dev->ibd_bio_set); 200c66ac9dbSNicholas Bellinger ib_dev->ibd_bio_set = NULL; 201c66ac9dbSNicholas Bellinger } 202c66ac9dbSNicholas Bellinger ib_dev->ibd_bd = NULL; 203613640e4SNicholas Bellinger return ERR_PTR(ret); 204c66ac9dbSNicholas Bellinger } 205c66ac9dbSNicholas Bellinger 206c66ac9dbSNicholas Bellinger static void iblock_free_device(void *p) 207c66ac9dbSNicholas Bellinger { 208c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = p; 209c66ac9dbSNicholas Bellinger 210bc665524SNicholas Bellinger if (ib_dev->ibd_bd != NULL) 211c66ac9dbSNicholas Bellinger blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 212bc665524SNicholas Bellinger if (ib_dev->ibd_bio_set != NULL) 213c66ac9dbSNicholas Bellinger bioset_free(ib_dev->ibd_bio_set); 214c66ac9dbSNicholas Bellinger kfree(ib_dev); 215c66ac9dbSNicholas Bellinger } 216c66ac9dbSNicholas Bellinger 217c66ac9dbSNicholas Bellinger static inline struct iblock_req *IBLOCK_REQ(struct se_task *task) 218c66ac9dbSNicholas Bellinger { 219c66ac9dbSNicholas Bellinger return container_of(task, struct iblock_req, ib_task); 220c66ac9dbSNicholas Bellinger } 221c66ac9dbSNicholas Bellinger 222c66ac9dbSNicholas Bellinger static struct se_task * 2236708bb27SAndy Grover iblock_alloc_task(unsigned char *cdb) 224c66ac9dbSNicholas Bellinger { 225c66ac9dbSNicholas Bellinger struct iblock_req *ib_req; 226c66ac9dbSNicholas Bellinger 227c66ac9dbSNicholas Bellinger ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL); 2286708bb27SAndy Grover if (!ib_req) { 2296708bb27SAndy Grover pr_err("Unable to allocate memory for struct iblock_req\n"); 230c66ac9dbSNicholas Bellinger return NULL; 231c66ac9dbSNicholas Bellinger } 232c66ac9dbSNicholas Bellinger 233c66ac9dbSNicholas Bellinger atomic_set(&ib_req->ib_bio_cnt, 0); 234c66ac9dbSNicholas Bellinger return &ib_req->ib_task; 235c66ac9dbSNicholas Bellinger } 236c66ac9dbSNicholas Bellinger 237c66ac9dbSNicholas Bellinger static unsigned long long iblock_emulate_read_cap_with_block_size( 238c66ac9dbSNicholas Bellinger struct se_device *dev, 239c66ac9dbSNicholas Bellinger struct block_device *bd, 240c66ac9dbSNicholas Bellinger struct request_queue *q) 241c66ac9dbSNicholas Bellinger { 242c66ac9dbSNicholas Bellinger unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode), 243c66ac9dbSNicholas Bellinger bdev_logical_block_size(bd)) - 1); 244c66ac9dbSNicholas Bellinger u32 block_size = bdev_logical_block_size(bd); 245c66ac9dbSNicholas Bellinger 246e3d6f909SAndy Grover if (block_size == dev->se_sub_dev->se_dev_attrib.block_size) 247c66ac9dbSNicholas Bellinger return blocks_long; 248c66ac9dbSNicholas Bellinger 249c66ac9dbSNicholas Bellinger switch (block_size) { 250c66ac9dbSNicholas Bellinger case 4096: 251e3d6f909SAndy Grover switch (dev->se_sub_dev->se_dev_attrib.block_size) { 252c66ac9dbSNicholas Bellinger case 2048: 253c66ac9dbSNicholas Bellinger blocks_long <<= 1; 254c66ac9dbSNicholas Bellinger break; 255c66ac9dbSNicholas Bellinger case 1024: 256c66ac9dbSNicholas Bellinger blocks_long <<= 2; 257c66ac9dbSNicholas Bellinger break; 258c66ac9dbSNicholas Bellinger case 512: 259c66ac9dbSNicholas Bellinger blocks_long <<= 3; 260c66ac9dbSNicholas Bellinger default: 261c66ac9dbSNicholas Bellinger break; 262c66ac9dbSNicholas Bellinger } 263c66ac9dbSNicholas Bellinger break; 264c66ac9dbSNicholas Bellinger case 2048: 265e3d6f909SAndy Grover switch (dev->se_sub_dev->se_dev_attrib.block_size) { 266c66ac9dbSNicholas Bellinger case 4096: 267c66ac9dbSNicholas Bellinger blocks_long >>= 1; 268c66ac9dbSNicholas Bellinger break; 269c66ac9dbSNicholas Bellinger case 1024: 270c66ac9dbSNicholas Bellinger blocks_long <<= 1; 271c66ac9dbSNicholas Bellinger break; 272c66ac9dbSNicholas Bellinger case 512: 273c66ac9dbSNicholas Bellinger blocks_long <<= 2; 274c66ac9dbSNicholas Bellinger break; 275c66ac9dbSNicholas Bellinger default: 276c66ac9dbSNicholas Bellinger break; 277c66ac9dbSNicholas Bellinger } 278c66ac9dbSNicholas Bellinger break; 279c66ac9dbSNicholas Bellinger case 1024: 280e3d6f909SAndy Grover switch (dev->se_sub_dev->se_dev_attrib.block_size) { 281c66ac9dbSNicholas Bellinger case 4096: 282c66ac9dbSNicholas Bellinger blocks_long >>= 2; 283c66ac9dbSNicholas Bellinger break; 284c66ac9dbSNicholas Bellinger case 2048: 285c66ac9dbSNicholas Bellinger blocks_long >>= 1; 286c66ac9dbSNicholas Bellinger break; 287c66ac9dbSNicholas Bellinger case 512: 288c66ac9dbSNicholas Bellinger blocks_long <<= 1; 289c66ac9dbSNicholas Bellinger break; 290c66ac9dbSNicholas Bellinger default: 291c66ac9dbSNicholas Bellinger break; 292c66ac9dbSNicholas Bellinger } 293c66ac9dbSNicholas Bellinger break; 294c66ac9dbSNicholas Bellinger case 512: 295e3d6f909SAndy Grover switch (dev->se_sub_dev->se_dev_attrib.block_size) { 296c66ac9dbSNicholas Bellinger case 4096: 297c66ac9dbSNicholas Bellinger blocks_long >>= 3; 298c66ac9dbSNicholas Bellinger break; 299c66ac9dbSNicholas Bellinger case 2048: 300c66ac9dbSNicholas Bellinger blocks_long >>= 2; 301c66ac9dbSNicholas Bellinger break; 302c66ac9dbSNicholas Bellinger case 1024: 303c66ac9dbSNicholas Bellinger blocks_long >>= 1; 304c66ac9dbSNicholas Bellinger break; 305c66ac9dbSNicholas Bellinger default: 306c66ac9dbSNicholas Bellinger break; 307c66ac9dbSNicholas Bellinger } 308c66ac9dbSNicholas Bellinger break; 309c66ac9dbSNicholas Bellinger default: 310c66ac9dbSNicholas Bellinger break; 311c66ac9dbSNicholas Bellinger } 312c66ac9dbSNicholas Bellinger 313c66ac9dbSNicholas Bellinger return blocks_long; 314c66ac9dbSNicholas Bellinger } 315c66ac9dbSNicholas Bellinger 316c66ac9dbSNicholas Bellinger /* 317c66ac9dbSNicholas Bellinger * Emulate SYCHRONIZE_CACHE_* 318c66ac9dbSNicholas Bellinger */ 319c66ac9dbSNicholas Bellinger static void iblock_emulate_sync_cache(struct se_task *task) 320c66ac9dbSNicholas Bellinger { 321e3d6f909SAndy Grover struct se_cmd *cmd = task->task_se_cmd; 322c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr; 323a1d8b49aSAndy Grover int immed = (cmd->t_task_cdb[1] & 0x2); 324c66ac9dbSNicholas Bellinger sector_t error_sector; 325c66ac9dbSNicholas Bellinger int ret; 326c66ac9dbSNicholas Bellinger 327c66ac9dbSNicholas Bellinger /* 328c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 329c66ac9dbSNicholas Bellinger * for this SYNCHRONIZE_CACHE op 330c66ac9dbSNicholas Bellinger */ 331c66ac9dbSNicholas Bellinger if (immed) 332c66ac9dbSNicholas Bellinger transport_complete_sync_cache(cmd, 1); 333c66ac9dbSNicholas Bellinger 334c66ac9dbSNicholas Bellinger /* 335c66ac9dbSNicholas Bellinger * blkdev_issue_flush() does not support a specifying a range, so 336c66ac9dbSNicholas Bellinger * we have to flush the entire cache. 337c66ac9dbSNicholas Bellinger */ 338c66ac9dbSNicholas Bellinger ret = blkdev_issue_flush(ib_dev->ibd_bd, GFP_KERNEL, &error_sector); 339c66ac9dbSNicholas Bellinger if (ret != 0) { 3406708bb27SAndy Grover pr_err("IBLOCK: block_issue_flush() failed: %d " 341c66ac9dbSNicholas Bellinger " error_sector: %llu\n", ret, 342c66ac9dbSNicholas Bellinger (unsigned long long)error_sector); 343c66ac9dbSNicholas Bellinger } 344c66ac9dbSNicholas Bellinger 345c66ac9dbSNicholas Bellinger if (!immed) 346c66ac9dbSNicholas Bellinger transport_complete_sync_cache(cmd, ret == 0); 347c66ac9dbSNicholas Bellinger } 348c66ac9dbSNicholas Bellinger 349c66ac9dbSNicholas Bellinger /* 350c66ac9dbSNicholas Bellinger * Tell TCM Core that we are capable of WriteCache emulation for 351c66ac9dbSNicholas Bellinger * an underlying struct se_device. 352c66ac9dbSNicholas Bellinger */ 353c66ac9dbSNicholas Bellinger static int iblock_emulated_write_cache(struct se_device *dev) 354c66ac9dbSNicholas Bellinger { 355c66ac9dbSNicholas Bellinger return 1; 356c66ac9dbSNicholas Bellinger } 357c66ac9dbSNicholas Bellinger 358c66ac9dbSNicholas Bellinger static int iblock_emulated_dpo(struct se_device *dev) 359c66ac9dbSNicholas Bellinger { 360c66ac9dbSNicholas Bellinger return 0; 361c66ac9dbSNicholas Bellinger } 362c66ac9dbSNicholas Bellinger 363c66ac9dbSNicholas Bellinger /* 364c66ac9dbSNicholas Bellinger * Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs 365c66ac9dbSNicholas Bellinger * for TYPE_DISK. 366c66ac9dbSNicholas Bellinger */ 367c66ac9dbSNicholas Bellinger static int iblock_emulated_fua_write(struct se_device *dev) 368c66ac9dbSNicholas Bellinger { 369c66ac9dbSNicholas Bellinger return 1; 370c66ac9dbSNicholas Bellinger } 371c66ac9dbSNicholas Bellinger 372c66ac9dbSNicholas Bellinger static int iblock_emulated_fua_read(struct se_device *dev) 373c66ac9dbSNicholas Bellinger { 374c66ac9dbSNicholas Bellinger return 0; 375c66ac9dbSNicholas Bellinger } 376c66ac9dbSNicholas Bellinger 377c66ac9dbSNicholas Bellinger static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range) 378c66ac9dbSNicholas Bellinger { 379c66ac9dbSNicholas Bellinger struct iblock_dev *ibd = dev->dev_ptr; 380c66ac9dbSNicholas Bellinger struct block_device *bd = ibd->ibd_bd; 381c66ac9dbSNicholas Bellinger int barrier = 0; 382c66ac9dbSNicholas Bellinger 383c66ac9dbSNicholas Bellinger return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier); 384c66ac9dbSNicholas Bellinger } 385c66ac9dbSNicholas Bellinger 386c66ac9dbSNicholas Bellinger static void iblock_free_task(struct se_task *task) 387c66ac9dbSNicholas Bellinger { 388dbbf3e94SChristoph Hellwig kfree(IBLOCK_REQ(task)); 389c66ac9dbSNicholas Bellinger } 390c66ac9dbSNicholas Bellinger 391c66ac9dbSNicholas Bellinger enum { 392c66ac9dbSNicholas Bellinger Opt_udev_path, Opt_force, Opt_err 393c66ac9dbSNicholas Bellinger }; 394c66ac9dbSNicholas Bellinger 395c66ac9dbSNicholas Bellinger static match_table_t tokens = { 396c66ac9dbSNicholas Bellinger {Opt_udev_path, "udev_path=%s"}, 397c66ac9dbSNicholas Bellinger {Opt_force, "force=%d"}, 398c66ac9dbSNicholas Bellinger {Opt_err, NULL} 399c66ac9dbSNicholas Bellinger }; 400c66ac9dbSNicholas Bellinger 401c66ac9dbSNicholas Bellinger static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba, 402c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 403c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 404c66ac9dbSNicholas Bellinger { 405c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr; 4066d180253SJesper Juhl char *orig, *ptr, *arg_p, *opts; 407c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 40821bca31cSRoland Dreier int ret = 0, token; 409c66ac9dbSNicholas Bellinger 410c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 411c66ac9dbSNicholas Bellinger if (!opts) 412c66ac9dbSNicholas Bellinger return -ENOMEM; 413c66ac9dbSNicholas Bellinger 414c66ac9dbSNicholas Bellinger orig = opts; 415c66ac9dbSNicholas Bellinger 416c66ac9dbSNicholas Bellinger while ((ptr = strsep(&opts, ",")) != NULL) { 417c66ac9dbSNicholas Bellinger if (!*ptr) 418c66ac9dbSNicholas Bellinger continue; 419c66ac9dbSNicholas Bellinger 420c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 421c66ac9dbSNicholas Bellinger switch (token) { 422c66ac9dbSNicholas Bellinger case Opt_udev_path: 423c66ac9dbSNicholas Bellinger if (ib_dev->ibd_bd) { 4246708bb27SAndy Grover pr_err("Unable to set udev_path= while" 425c66ac9dbSNicholas Bellinger " ib_dev->ibd_bd exists\n"); 426c66ac9dbSNicholas Bellinger ret = -EEXIST; 427c66ac9dbSNicholas Bellinger goto out; 428c66ac9dbSNicholas Bellinger } 4296d180253SJesper Juhl arg_p = match_strdup(&args[0]); 4306d180253SJesper Juhl if (!arg_p) { 4316d180253SJesper Juhl ret = -ENOMEM; 4326d180253SJesper Juhl break; 4336d180253SJesper Juhl } 4346d180253SJesper Juhl snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN, 4356d180253SJesper Juhl "%s", arg_p); 4366d180253SJesper Juhl kfree(arg_p); 4376708bb27SAndy Grover pr_debug("IBLOCK: Referencing UDEV path: %s\n", 438c66ac9dbSNicholas Bellinger ib_dev->ibd_udev_path); 439c66ac9dbSNicholas Bellinger ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH; 440c66ac9dbSNicholas Bellinger break; 441c66ac9dbSNicholas Bellinger case Opt_force: 442c66ac9dbSNicholas Bellinger break; 443c66ac9dbSNicholas Bellinger default: 444c66ac9dbSNicholas Bellinger break; 445c66ac9dbSNicholas Bellinger } 446c66ac9dbSNicholas Bellinger } 447c66ac9dbSNicholas Bellinger 448c66ac9dbSNicholas Bellinger out: 449c66ac9dbSNicholas Bellinger kfree(orig); 450c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 451c66ac9dbSNicholas Bellinger } 452c66ac9dbSNicholas Bellinger 453c66ac9dbSNicholas Bellinger static ssize_t iblock_check_configfs_dev_params( 454c66ac9dbSNicholas Bellinger struct se_hba *hba, 455c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev) 456c66ac9dbSNicholas Bellinger { 457c66ac9dbSNicholas Bellinger struct iblock_dev *ibd = se_dev->se_dev_su_ptr; 458c66ac9dbSNicholas Bellinger 459c66ac9dbSNicholas Bellinger if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) { 4606708bb27SAndy Grover pr_err("Missing udev_path= parameters for IBLOCK\n"); 461e3d6f909SAndy Grover return -EINVAL; 462c66ac9dbSNicholas Bellinger } 463c66ac9dbSNicholas Bellinger 464c66ac9dbSNicholas Bellinger return 0; 465c66ac9dbSNicholas Bellinger } 466c66ac9dbSNicholas Bellinger 467c66ac9dbSNicholas Bellinger static ssize_t iblock_show_configfs_dev_params( 468c66ac9dbSNicholas Bellinger struct se_hba *hba, 469c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 470c66ac9dbSNicholas Bellinger char *b) 471c66ac9dbSNicholas Bellinger { 472c66ac9dbSNicholas Bellinger struct iblock_dev *ibd = se_dev->se_dev_su_ptr; 473c66ac9dbSNicholas Bellinger struct block_device *bd = ibd->ibd_bd; 474c66ac9dbSNicholas Bellinger char buf[BDEVNAME_SIZE]; 475c66ac9dbSNicholas Bellinger ssize_t bl = 0; 476c66ac9dbSNicholas Bellinger 477c66ac9dbSNicholas Bellinger if (bd) 478c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "iBlock device: %s", 479c66ac9dbSNicholas Bellinger bdevname(bd, buf)); 480c66ac9dbSNicholas Bellinger if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) { 481c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " UDEV PATH: %s\n", 482c66ac9dbSNicholas Bellinger ibd->ibd_udev_path); 483c66ac9dbSNicholas Bellinger } else 484c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "\n"); 485c66ac9dbSNicholas Bellinger 486c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 487c66ac9dbSNicholas Bellinger if (bd) { 488c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Major: %d Minor: %d %s\n", 48921bca31cSRoland Dreier MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ? 490c66ac9dbSNicholas Bellinger "" : (bd->bd_holder == (struct iblock_dev *)ibd) ? 491c66ac9dbSNicholas Bellinger "CLAIMED: IBLOCK" : "CLAIMED: OS"); 492c66ac9dbSNicholas Bellinger } else { 49321bca31cSRoland Dreier bl += sprintf(b + bl, "Major: 0 Minor: 0\n"); 494c66ac9dbSNicholas Bellinger } 495c66ac9dbSNicholas Bellinger 496c66ac9dbSNicholas Bellinger return bl; 497c66ac9dbSNicholas Bellinger } 498c66ac9dbSNicholas Bellinger 499c66ac9dbSNicholas Bellinger static void iblock_bio_destructor(struct bio *bio) 500c66ac9dbSNicholas Bellinger { 501c66ac9dbSNicholas Bellinger struct se_task *task = bio->bi_private; 502c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = task->se_dev->dev_ptr; 503c66ac9dbSNicholas Bellinger 504c66ac9dbSNicholas Bellinger bio_free(bio, ib_dev->ibd_bio_set); 505c66ac9dbSNicholas Bellinger } 506c66ac9dbSNicholas Bellinger 507dbbf3e94SChristoph Hellwig static struct bio * 508dbbf3e94SChristoph Hellwig iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num) 509c66ac9dbSNicholas Bellinger { 510dbbf3e94SChristoph Hellwig struct iblock_dev *ib_dev = task->se_dev->dev_ptr; 511dbbf3e94SChristoph Hellwig struct iblock_req *ib_req = IBLOCK_REQ(task); 512c66ac9dbSNicholas Bellinger struct bio *bio; 513c66ac9dbSNicholas Bellinger 514c66ac9dbSNicholas Bellinger bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set); 5156708bb27SAndy Grover if (!bio) { 5166708bb27SAndy Grover pr_err("Unable to allocate memory for bio\n"); 517c66ac9dbSNicholas Bellinger return NULL; 518c66ac9dbSNicholas Bellinger } 519c66ac9dbSNicholas Bellinger 5206708bb27SAndy Grover pr_debug("Allocated bio: %p task_sg_nents: %u using ibd_bio_set:" 5216708bb27SAndy Grover " %p\n", bio, task->task_sg_nents, ib_dev->ibd_bio_set); 5226708bb27SAndy Grover pr_debug("Allocated bio: %p task_size: %u\n", bio, task->task_size); 523c66ac9dbSNicholas Bellinger 524c66ac9dbSNicholas Bellinger bio->bi_bdev = ib_dev->ibd_bd; 5255951146dSAndy Grover bio->bi_private = task; 526c66ac9dbSNicholas Bellinger bio->bi_destructor = iblock_bio_destructor; 527c66ac9dbSNicholas Bellinger bio->bi_end_io = &iblock_bio_done; 528c66ac9dbSNicholas Bellinger bio->bi_sector = lba; 529c66ac9dbSNicholas Bellinger atomic_inc(&ib_req->ib_bio_cnt); 530c66ac9dbSNicholas Bellinger 5316708bb27SAndy Grover pr_debug("Set bio->bi_sector: %llu\n", (unsigned long long)bio->bi_sector); 5326708bb27SAndy Grover pr_debug("Set ib_req->ib_bio_cnt: %d\n", 533c66ac9dbSNicholas Bellinger atomic_read(&ib_req->ib_bio_cnt)); 534c66ac9dbSNicholas Bellinger return bio; 535c66ac9dbSNicholas Bellinger } 536c66ac9dbSNicholas Bellinger 537dbbf3e94SChristoph Hellwig static int iblock_do_task(struct se_task *task) 538c66ac9dbSNicholas Bellinger { 539c66ac9dbSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 5405951146dSAndy Grover struct se_device *dev = cmd->se_dev; 541dbbf3e94SChristoph Hellwig struct bio *bio; 542dbbf3e94SChristoph Hellwig struct bio_list list; 543c66ac9dbSNicholas Bellinger struct scatterlist *sg; 5446708bb27SAndy Grover u32 i, sg_num = task->task_sg_nents; 545c66ac9dbSNicholas Bellinger sector_t block_lba; 546dbbf3e94SChristoph Hellwig struct blk_plug plug; 547dbbf3e94SChristoph Hellwig int rw; 548dbbf3e94SChristoph Hellwig 549dbbf3e94SChristoph Hellwig if (task->task_data_direction == DMA_TO_DEVICE) { 550dbbf3e94SChristoph Hellwig /* 551dbbf3e94SChristoph Hellwig * Force data to disk if we pretend to not have a volatile 552dbbf3e94SChristoph Hellwig * write cache, or the initiator set the Force Unit Access bit. 553dbbf3e94SChristoph Hellwig */ 554dbbf3e94SChristoph Hellwig if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 || 555dbbf3e94SChristoph Hellwig (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 && 556dbbf3e94SChristoph Hellwig task->task_se_cmd->t_tasks_fua)) 557dbbf3e94SChristoph Hellwig rw = WRITE_FUA; 558dbbf3e94SChristoph Hellwig else 559dbbf3e94SChristoph Hellwig rw = WRITE; 560dbbf3e94SChristoph Hellwig } else { 561dbbf3e94SChristoph Hellwig rw = READ; 562dbbf3e94SChristoph Hellwig } 563dbbf3e94SChristoph Hellwig 564c66ac9dbSNicholas Bellinger /* 565c66ac9dbSNicholas Bellinger * Do starting conversion up from non 512-byte blocksize with 566c66ac9dbSNicholas Bellinger * struct se_task SCSI blocksize into Linux/Block 512 units for BIO. 567c66ac9dbSNicholas Bellinger */ 568e3d6f909SAndy Grover if (dev->se_sub_dev->se_dev_attrib.block_size == 4096) 569c66ac9dbSNicholas Bellinger block_lba = (task->task_lba << 3); 570e3d6f909SAndy Grover else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048) 571c66ac9dbSNicholas Bellinger block_lba = (task->task_lba << 2); 572e3d6f909SAndy Grover else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024) 573c66ac9dbSNicholas Bellinger block_lba = (task->task_lba << 1); 574e3d6f909SAndy Grover else if (dev->se_sub_dev->se_dev_attrib.block_size == 512) 575c66ac9dbSNicholas Bellinger block_lba = task->task_lba; 576c66ac9dbSNicholas Bellinger else { 5776708bb27SAndy Grover pr_err("Unsupported SCSI -> BLOCK LBA conversion:" 578e3d6f909SAndy Grover " %u\n", dev->se_sub_dev->se_dev_attrib.block_size); 579c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 580c66ac9dbSNicholas Bellinger } 581c66ac9dbSNicholas Bellinger 582dbbf3e94SChristoph Hellwig bio = iblock_get_bio(task, block_lba, sg_num); 5836708bb27SAndy Grover if (!bio) 584dbbf3e94SChristoph Hellwig return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; 585c66ac9dbSNicholas Bellinger 586dbbf3e94SChristoph Hellwig bio_list_init(&list); 587dbbf3e94SChristoph Hellwig bio_list_add(&list, bio); 588dbbf3e94SChristoph Hellwig 5896708bb27SAndy Grover for_each_sg(task->task_sg, sg, task->task_sg_nents, i) { 590dbbf3e94SChristoph Hellwig /* 591dbbf3e94SChristoph Hellwig * XXX: if the length the device accepts is shorter than the 592dbbf3e94SChristoph Hellwig * length of the S/G list entry this will cause and 593dbbf3e94SChristoph Hellwig * endless loop. Better hope no driver uses huge pages. 594dbbf3e94SChristoph Hellwig */ 595dbbf3e94SChristoph Hellwig while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) 596dbbf3e94SChristoph Hellwig != sg->length) { 597dbbf3e94SChristoph Hellwig bio = iblock_get_bio(task, block_lba, sg_num); 5986708bb27SAndy Grover if (!bio) 599c66ac9dbSNicholas Bellinger goto fail; 600dbbf3e94SChristoph Hellwig bio_list_add(&list, bio); 601c66ac9dbSNicholas Bellinger } 602dbbf3e94SChristoph Hellwig 603c66ac9dbSNicholas Bellinger /* Always in 512 byte units for Linux/Block */ 604c66ac9dbSNicholas Bellinger block_lba += sg->length >> IBLOCK_LBA_SHIFT; 605c66ac9dbSNicholas Bellinger sg_num--; 606c66ac9dbSNicholas Bellinger } 607c66ac9dbSNicholas Bellinger 608dbbf3e94SChristoph Hellwig blk_start_plug(&plug); 609dbbf3e94SChristoph Hellwig while ((bio = bio_list_pop(&list))) 610dbbf3e94SChristoph Hellwig submit_bio(rw, bio); 611dbbf3e94SChristoph Hellwig blk_finish_plug(&plug); 612dbbf3e94SChristoph Hellwig 613dbbf3e94SChristoph Hellwig return PYX_TRANSPORT_SENT_TO_TRANSPORT; 614dbbf3e94SChristoph Hellwig 615c66ac9dbSNicholas Bellinger fail: 616dbbf3e94SChristoph Hellwig while ((bio = bio_list_pop(&list))) 617c66ac9dbSNicholas Bellinger bio_put(bio); 618dbbf3e94SChristoph Hellwig return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; 619c66ac9dbSNicholas Bellinger } 620c66ac9dbSNicholas Bellinger 621c66ac9dbSNicholas Bellinger static unsigned char *iblock_get_cdb(struct se_task *task) 622c66ac9dbSNicholas Bellinger { 623c66ac9dbSNicholas Bellinger return IBLOCK_REQ(task)->ib_scsi_cdb; 624c66ac9dbSNicholas Bellinger } 625c66ac9dbSNicholas Bellinger 626c66ac9dbSNicholas Bellinger static u32 iblock_get_device_rev(struct se_device *dev) 627c66ac9dbSNicholas Bellinger { 628c66ac9dbSNicholas Bellinger return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ 629c66ac9dbSNicholas Bellinger } 630c66ac9dbSNicholas Bellinger 631c66ac9dbSNicholas Bellinger static u32 iblock_get_device_type(struct se_device *dev) 632c66ac9dbSNicholas Bellinger { 633c66ac9dbSNicholas Bellinger return TYPE_DISK; 634c66ac9dbSNicholas Bellinger } 635c66ac9dbSNicholas Bellinger 636c66ac9dbSNicholas Bellinger static sector_t iblock_get_blocks(struct se_device *dev) 637c66ac9dbSNicholas Bellinger { 638c66ac9dbSNicholas Bellinger struct iblock_dev *ibd = dev->dev_ptr; 639c66ac9dbSNicholas Bellinger struct block_device *bd = ibd->ibd_bd; 640c66ac9dbSNicholas Bellinger struct request_queue *q = bdev_get_queue(bd); 641c66ac9dbSNicholas Bellinger 642c66ac9dbSNicholas Bellinger return iblock_emulate_read_cap_with_block_size(dev, bd, q); 643c66ac9dbSNicholas Bellinger } 644c66ac9dbSNicholas Bellinger 645c66ac9dbSNicholas Bellinger static void iblock_bio_done(struct bio *bio, int err) 646c66ac9dbSNicholas Bellinger { 647c66ac9dbSNicholas Bellinger struct se_task *task = bio->bi_private; 648c66ac9dbSNicholas Bellinger struct iblock_req *ibr = IBLOCK_REQ(task); 649dbbf3e94SChristoph Hellwig 650c66ac9dbSNicholas Bellinger /* 651c66ac9dbSNicholas Bellinger * Set -EIO if !BIO_UPTODATE and the passed is still err=0 652c66ac9dbSNicholas Bellinger */ 6536708bb27SAndy Grover if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err) 654c66ac9dbSNicholas Bellinger err = -EIO; 655c66ac9dbSNicholas Bellinger 656c66ac9dbSNicholas Bellinger if (err != 0) { 6576708bb27SAndy Grover pr_err("test_bit(BIO_UPTODATE) failed for bio: %p," 658c66ac9dbSNicholas Bellinger " err: %d\n", bio, err); 659c66ac9dbSNicholas Bellinger /* 660c66ac9dbSNicholas Bellinger * Bump the ib_bio_err_cnt and release bio. 661c66ac9dbSNicholas Bellinger */ 662c66ac9dbSNicholas Bellinger atomic_inc(&ibr->ib_bio_err_cnt); 663c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 664dbbf3e94SChristoph Hellwig } 665dbbf3e94SChristoph Hellwig 666c66ac9dbSNicholas Bellinger bio_put(bio); 667dbbf3e94SChristoph Hellwig 6686708bb27SAndy Grover if (!atomic_dec_and_test(&ibr->ib_bio_cnt)) 669c66ac9dbSNicholas Bellinger return; 670c66ac9dbSNicholas Bellinger 6716708bb27SAndy Grover pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n", 672dbbf3e94SChristoph Hellwig task, bio, task->task_lba, 673dbbf3e94SChristoph Hellwig (unsigned long long)bio->bi_sector, err); 674dbbf3e94SChristoph Hellwig 675dbbf3e94SChristoph Hellwig transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt)); 676c66ac9dbSNicholas Bellinger } 677c66ac9dbSNicholas Bellinger 678c66ac9dbSNicholas Bellinger static struct se_subsystem_api iblock_template = { 679c66ac9dbSNicholas Bellinger .name = "iblock", 680c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 681c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, 682c66ac9dbSNicholas Bellinger .attach_hba = iblock_attach_hba, 683c66ac9dbSNicholas Bellinger .detach_hba = iblock_detach_hba, 684c66ac9dbSNicholas Bellinger .allocate_virtdevice = iblock_allocate_virtdevice, 685c66ac9dbSNicholas Bellinger .create_virtdevice = iblock_create_virtdevice, 686c66ac9dbSNicholas Bellinger .free_device = iblock_free_device, 687c66ac9dbSNicholas Bellinger .dpo_emulated = iblock_emulated_dpo, 688c66ac9dbSNicholas Bellinger .fua_write_emulated = iblock_emulated_fua_write, 689c66ac9dbSNicholas Bellinger .fua_read_emulated = iblock_emulated_fua_read, 690c66ac9dbSNicholas Bellinger .write_cache_emulated = iblock_emulated_write_cache, 691c66ac9dbSNicholas Bellinger .alloc_task = iblock_alloc_task, 692c66ac9dbSNicholas Bellinger .do_task = iblock_do_task, 693c66ac9dbSNicholas Bellinger .do_discard = iblock_do_discard, 694c66ac9dbSNicholas Bellinger .do_sync_cache = iblock_emulate_sync_cache, 695c66ac9dbSNicholas Bellinger .free_task = iblock_free_task, 696c66ac9dbSNicholas Bellinger .check_configfs_dev_params = iblock_check_configfs_dev_params, 697c66ac9dbSNicholas Bellinger .set_configfs_dev_params = iblock_set_configfs_dev_params, 698c66ac9dbSNicholas Bellinger .show_configfs_dev_params = iblock_show_configfs_dev_params, 699c66ac9dbSNicholas Bellinger .get_cdb = iblock_get_cdb, 700c66ac9dbSNicholas Bellinger .get_device_rev = iblock_get_device_rev, 701c66ac9dbSNicholas Bellinger .get_device_type = iblock_get_device_type, 702c66ac9dbSNicholas Bellinger .get_blocks = iblock_get_blocks, 703c66ac9dbSNicholas Bellinger }; 704c66ac9dbSNicholas Bellinger 705c66ac9dbSNicholas Bellinger static int __init iblock_module_init(void) 706c66ac9dbSNicholas Bellinger { 707c66ac9dbSNicholas Bellinger return transport_subsystem_register(&iblock_template); 708c66ac9dbSNicholas Bellinger } 709c66ac9dbSNicholas Bellinger 710c66ac9dbSNicholas Bellinger static void iblock_module_exit(void) 711c66ac9dbSNicholas Bellinger { 712c66ac9dbSNicholas Bellinger transport_subsystem_release(&iblock_template); 713c66ac9dbSNicholas Bellinger } 714c66ac9dbSNicholas Bellinger 715c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin"); 716c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 717c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 718c66ac9dbSNicholas Bellinger 719c66ac9dbSNicholas Bellinger module_init(iblock_module_init); 720c66ac9dbSNicholas Bellinger module_exit(iblock_module_exit); 721