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> 40827509e3SPaul Gortmaker #include <linux/module.h> 41c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 42c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 4314150a6bSChristoph Hellwig #include <asm/unaligned.h> 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 46c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 47c66ac9dbSNicholas Bellinger 48c66ac9dbSNicholas Bellinger #include "target_core_iblock.h" 49c66ac9dbSNicholas Bellinger 50d5b4a21bSChristoph Hellwig #define IBLOCK_MAX_BIO_PER_TASK 32 /* max # of bios to submit at a time */ 51d5b4a21bSChristoph Hellwig #define IBLOCK_BIO_POOL_SIZE 128 52d5b4a21bSChristoph Hellwig 530fd97ccfSChristoph Hellwig static inline struct iblock_dev *IBLOCK_DEV(struct se_device *dev) 540fd97ccfSChristoph Hellwig { 550fd97ccfSChristoph Hellwig return container_of(dev, struct iblock_dev, dev); 560fd97ccfSChristoph Hellwig } 570fd97ccfSChristoph Hellwig 580fd97ccfSChristoph Hellwig 59c66ac9dbSNicholas Bellinger static struct se_subsystem_api iblock_template; 60c66ac9dbSNicholas Bellinger 61c66ac9dbSNicholas Bellinger static void iblock_bio_done(struct bio *, int); 62c66ac9dbSNicholas Bellinger 63c66ac9dbSNicholas Bellinger /* iblock_attach_hba(): (Part of se_subsystem_api_t template) 64c66ac9dbSNicholas Bellinger * 65c66ac9dbSNicholas Bellinger * 66c66ac9dbSNicholas Bellinger */ 67c66ac9dbSNicholas Bellinger static int iblock_attach_hba(struct se_hba *hba, u32 host_id) 68c66ac9dbSNicholas Bellinger { 696708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM iBlock HBA Driver %s on" 70c66ac9dbSNicholas Bellinger " Generic Target Core Stack %s\n", hba->hba_id, 71c66ac9dbSNicholas Bellinger IBLOCK_VERSION, TARGET_CORE_MOD_VERSION); 72c66ac9dbSNicholas Bellinger return 0; 73c66ac9dbSNicholas Bellinger } 74c66ac9dbSNicholas Bellinger 75c66ac9dbSNicholas Bellinger static void iblock_detach_hba(struct se_hba *hba) 76c66ac9dbSNicholas Bellinger { 77c66ac9dbSNicholas Bellinger } 78c66ac9dbSNicholas Bellinger 790fd97ccfSChristoph Hellwig static struct se_device *iblock_alloc_device(struct se_hba *hba, const char *name) 80c66ac9dbSNicholas Bellinger { 81c66ac9dbSNicholas Bellinger struct iblock_dev *ib_dev = NULL; 82c66ac9dbSNicholas Bellinger 83c66ac9dbSNicholas Bellinger ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL); 846708bb27SAndy Grover if (!ib_dev) { 856708bb27SAndy Grover pr_err("Unable to allocate struct iblock_dev\n"); 86c66ac9dbSNicholas Bellinger return NULL; 87c66ac9dbSNicholas Bellinger } 88c66ac9dbSNicholas Bellinger 896708bb27SAndy Grover pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name); 90c66ac9dbSNicholas Bellinger 910fd97ccfSChristoph Hellwig return &ib_dev->dev; 92c66ac9dbSNicholas Bellinger } 93c66ac9dbSNicholas Bellinger 940fd97ccfSChristoph Hellwig static int iblock_configure_device(struct se_device *dev) 95c66ac9dbSNicholas Bellinger { 960fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 97c66ac9dbSNicholas Bellinger struct request_queue *q; 980fd97ccfSChristoph Hellwig struct block_device *bd = NULL; 9944bfd018SAndy Grover fmode_t mode; 1000fd97ccfSChristoph Hellwig int ret = -ENOMEM; 101c66ac9dbSNicholas Bellinger 1020fd97ccfSChristoph Hellwig if (!(ib_dev->ibd_flags & IBDF_HAS_UDEV_PATH)) { 1030fd97ccfSChristoph Hellwig pr_err("Missing udev_path= parameters for IBLOCK\n"); 1040fd97ccfSChristoph Hellwig return -EINVAL; 105c66ac9dbSNicholas Bellinger } 106d5b4a21bSChristoph Hellwig 107d5b4a21bSChristoph Hellwig ib_dev->ibd_bio_set = bioset_create(IBLOCK_BIO_POOL_SIZE, 0); 1086708bb27SAndy Grover if (!ib_dev->ibd_bio_set) { 1090fd97ccfSChristoph Hellwig pr_err("IBLOCK: Unable to create bioset\n"); 1100fd97ccfSChristoph Hellwig goto out; 111c66ac9dbSNicholas Bellinger } 1120fd97ccfSChristoph Hellwig 1136708bb27SAndy Grover pr_debug( "IBLOCK: Claiming struct block_device: %s\n", 114c66ac9dbSNicholas Bellinger ib_dev->ibd_udev_path); 115c66ac9dbSNicholas Bellinger 11644bfd018SAndy Grover mode = FMODE_READ|FMODE_EXCL; 11744bfd018SAndy Grover if (!ib_dev->ibd_readonly) 11844bfd018SAndy Grover mode |= FMODE_WRITE; 11944bfd018SAndy Grover 12044bfd018SAndy Grover bd = blkdev_get_by_path(ib_dev->ibd_udev_path, mode, ib_dev); 121613640e4SNicholas Bellinger if (IS_ERR(bd)) { 122613640e4SNicholas Bellinger ret = PTR_ERR(bd); 1230fd97ccfSChristoph Hellwig goto out_free_bioset; 124613640e4SNicholas Bellinger } 125c66ac9dbSNicholas Bellinger ib_dev->ibd_bd = bd; 126c66ac9dbSNicholas Bellinger 1270fd97ccfSChristoph Hellwig q = bdev_get_queue(bd); 1280fd97ccfSChristoph Hellwig 1290fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = bdev_logical_block_size(bd); 1300fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = UINT_MAX; 1310fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = q->nr_requests; 132c66ac9dbSNicholas Bellinger 133c66ac9dbSNicholas Bellinger /* 134c66ac9dbSNicholas Bellinger * Check if the underlying struct block_device request_queue supports 135c66ac9dbSNicholas Bellinger * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM 136c66ac9dbSNicholas Bellinger * in ATA and we need to set TPE=1 137c66ac9dbSNicholas Bellinger */ 138613640e4SNicholas Bellinger if (blk_queue_discard(q)) { 1390fd97ccfSChristoph Hellwig dev->dev_attrib.max_unmap_lba_count = 140c66ac9dbSNicholas Bellinger q->limits.max_discard_sectors; 1410fd97ccfSChristoph Hellwig 142c66ac9dbSNicholas Bellinger /* 143c66ac9dbSNicholas Bellinger * Currently hardcoded to 1 in Linux/SCSI code.. 144c66ac9dbSNicholas Bellinger */ 1450fd97ccfSChristoph Hellwig dev->dev_attrib.max_unmap_block_desc_count = 1; 1460fd97ccfSChristoph Hellwig dev->dev_attrib.unmap_granularity = 1477347b5ffSMarco Sanvido q->limits.discard_granularity >> 9; 1480fd97ccfSChristoph Hellwig dev->dev_attrib.unmap_granularity_alignment = 149c66ac9dbSNicholas Bellinger q->limits.discard_alignment; 150c66ac9dbSNicholas Bellinger 1516708bb27SAndy Grover pr_debug("IBLOCK: BLOCK Discard support available," 152c66ac9dbSNicholas Bellinger " disabled by default\n"); 153c66ac9dbSNicholas Bellinger } 154c66ac9dbSNicholas Bellinger 155e22a7f07SRoland Dreier if (blk_queue_nonrot(q)) 1560fd97ccfSChristoph Hellwig dev->dev_attrib.is_nonrot = 1; 1570fd97ccfSChristoph Hellwig return 0; 158e22a7f07SRoland Dreier 1590fd97ccfSChristoph Hellwig out_free_bioset: 160c66ac9dbSNicholas Bellinger bioset_free(ib_dev->ibd_bio_set); 161c66ac9dbSNicholas Bellinger ib_dev->ibd_bio_set = NULL; 1620fd97ccfSChristoph Hellwig out: 1630fd97ccfSChristoph Hellwig return ret; 164c66ac9dbSNicholas Bellinger } 165c66ac9dbSNicholas Bellinger 1660fd97ccfSChristoph Hellwig static void iblock_free_device(struct se_device *dev) 167c66ac9dbSNicholas Bellinger { 1680fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 169c66ac9dbSNicholas Bellinger 170bc665524SNicholas Bellinger if (ib_dev->ibd_bd != NULL) 171c66ac9dbSNicholas Bellinger blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); 172bc665524SNicholas Bellinger if (ib_dev->ibd_bio_set != NULL) 173c66ac9dbSNicholas Bellinger bioset_free(ib_dev->ibd_bio_set); 174c66ac9dbSNicholas Bellinger kfree(ib_dev); 175c66ac9dbSNicholas Bellinger } 176c66ac9dbSNicholas Bellinger 177c66ac9dbSNicholas Bellinger static unsigned long long iblock_emulate_read_cap_with_block_size( 178c66ac9dbSNicholas Bellinger struct se_device *dev, 179c66ac9dbSNicholas Bellinger struct block_device *bd, 180c66ac9dbSNicholas Bellinger struct request_queue *q) 181c66ac9dbSNicholas Bellinger { 182c66ac9dbSNicholas Bellinger unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode), 183c66ac9dbSNicholas Bellinger bdev_logical_block_size(bd)) - 1); 184c66ac9dbSNicholas Bellinger u32 block_size = bdev_logical_block_size(bd); 185c66ac9dbSNicholas Bellinger 1860fd97ccfSChristoph Hellwig if (block_size == dev->dev_attrib.block_size) 187c66ac9dbSNicholas Bellinger return blocks_long; 188c66ac9dbSNicholas Bellinger 189c66ac9dbSNicholas Bellinger switch (block_size) { 190c66ac9dbSNicholas Bellinger case 4096: 1910fd97ccfSChristoph Hellwig switch (dev->dev_attrib.block_size) { 192c66ac9dbSNicholas Bellinger case 2048: 193c66ac9dbSNicholas Bellinger blocks_long <<= 1; 194c66ac9dbSNicholas Bellinger break; 195c66ac9dbSNicholas Bellinger case 1024: 196c66ac9dbSNicholas Bellinger blocks_long <<= 2; 197c66ac9dbSNicholas Bellinger break; 198c66ac9dbSNicholas Bellinger case 512: 199c66ac9dbSNicholas Bellinger blocks_long <<= 3; 200c66ac9dbSNicholas Bellinger default: 201c66ac9dbSNicholas Bellinger break; 202c66ac9dbSNicholas Bellinger } 203c66ac9dbSNicholas Bellinger break; 204c66ac9dbSNicholas Bellinger case 2048: 2050fd97ccfSChristoph Hellwig switch (dev->dev_attrib.block_size) { 206c66ac9dbSNicholas Bellinger case 4096: 207c66ac9dbSNicholas Bellinger blocks_long >>= 1; 208c66ac9dbSNicholas Bellinger break; 209c66ac9dbSNicholas Bellinger case 1024: 210c66ac9dbSNicholas Bellinger blocks_long <<= 1; 211c66ac9dbSNicholas Bellinger break; 212c66ac9dbSNicholas Bellinger case 512: 213c66ac9dbSNicholas Bellinger blocks_long <<= 2; 214c66ac9dbSNicholas Bellinger break; 215c66ac9dbSNicholas Bellinger default: 216c66ac9dbSNicholas Bellinger break; 217c66ac9dbSNicholas Bellinger } 218c66ac9dbSNicholas Bellinger break; 219c66ac9dbSNicholas Bellinger case 1024: 2200fd97ccfSChristoph Hellwig switch (dev->dev_attrib.block_size) { 221c66ac9dbSNicholas Bellinger case 4096: 222c66ac9dbSNicholas Bellinger blocks_long >>= 2; 223c66ac9dbSNicholas Bellinger break; 224c66ac9dbSNicholas Bellinger case 2048: 225c66ac9dbSNicholas Bellinger blocks_long >>= 1; 226c66ac9dbSNicholas Bellinger break; 227c66ac9dbSNicholas Bellinger case 512: 228c66ac9dbSNicholas Bellinger blocks_long <<= 1; 229c66ac9dbSNicholas Bellinger break; 230c66ac9dbSNicholas Bellinger default: 231c66ac9dbSNicholas Bellinger break; 232c66ac9dbSNicholas Bellinger } 233c66ac9dbSNicholas Bellinger break; 234c66ac9dbSNicholas Bellinger case 512: 2350fd97ccfSChristoph Hellwig switch (dev->dev_attrib.block_size) { 236c66ac9dbSNicholas Bellinger case 4096: 237c66ac9dbSNicholas Bellinger blocks_long >>= 3; 238c66ac9dbSNicholas Bellinger break; 239c66ac9dbSNicholas Bellinger case 2048: 240c66ac9dbSNicholas Bellinger blocks_long >>= 2; 241c66ac9dbSNicholas Bellinger break; 242c66ac9dbSNicholas Bellinger case 1024: 243c66ac9dbSNicholas Bellinger blocks_long >>= 1; 244c66ac9dbSNicholas Bellinger break; 245c66ac9dbSNicholas Bellinger default: 246c66ac9dbSNicholas Bellinger break; 247c66ac9dbSNicholas Bellinger } 248c66ac9dbSNicholas Bellinger break; 249c66ac9dbSNicholas Bellinger default: 250c66ac9dbSNicholas Bellinger break; 251c66ac9dbSNicholas Bellinger } 252c66ac9dbSNicholas Bellinger 253c66ac9dbSNicholas Bellinger return blocks_long; 254c66ac9dbSNicholas Bellinger } 255c66ac9dbSNicholas Bellinger 256df5fa691SChristoph Hellwig static void iblock_end_io_flush(struct bio *bio, int err) 257df5fa691SChristoph Hellwig { 258df5fa691SChristoph Hellwig struct se_cmd *cmd = bio->bi_private; 259df5fa691SChristoph Hellwig 260df5fa691SChristoph Hellwig if (err) 261df5fa691SChristoph Hellwig pr_err("IBLOCK: cache flush failed: %d\n", err); 262df5fa691SChristoph Hellwig 2635787cacdSChristoph Hellwig if (cmd) { 2645787cacdSChristoph Hellwig if (err) { 2655787cacdSChristoph Hellwig cmd->scsi_sense_reason = 2665787cacdSChristoph Hellwig TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 2675787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 2685787cacdSChristoph Hellwig } else { 2695787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 2705787cacdSChristoph Hellwig } 2715787cacdSChristoph Hellwig } 2725787cacdSChristoph Hellwig 273df5fa691SChristoph Hellwig bio_put(bio); 274df5fa691SChristoph Hellwig } 275df5fa691SChristoph Hellwig 276c66ac9dbSNicholas Bellinger /* 277df5fa691SChristoph Hellwig * Implement SYCHRONIZE CACHE. Note that we can't handle lba ranges and must 278df5fa691SChristoph Hellwig * always flush the whole cache. 279c66ac9dbSNicholas Bellinger */ 280ad67f0d9SChristoph Hellwig static int iblock_execute_sync_cache(struct se_cmd *cmd) 281c66ac9dbSNicholas Bellinger { 2820fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev); 283a1d8b49aSAndy Grover int immed = (cmd->t_task_cdb[1] & 0x2); 284df5fa691SChristoph Hellwig struct bio *bio; 285c66ac9dbSNicholas Bellinger 286c66ac9dbSNicholas Bellinger /* 287c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 288df5fa691SChristoph Hellwig * for this SYNCHRONIZE_CACHE op. 289c66ac9dbSNicholas Bellinger */ 290c66ac9dbSNicholas Bellinger if (immed) 2915787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 292c66ac9dbSNicholas Bellinger 293df5fa691SChristoph Hellwig bio = bio_alloc(GFP_KERNEL, 0); 294df5fa691SChristoph Hellwig bio->bi_end_io = iblock_end_io_flush; 295df5fa691SChristoph Hellwig bio->bi_bdev = ib_dev->ibd_bd; 296c66ac9dbSNicholas Bellinger if (!immed) 297df5fa691SChristoph Hellwig bio->bi_private = cmd; 298df5fa691SChristoph Hellwig submit_bio(WRITE_FLUSH, bio); 299ad67f0d9SChristoph Hellwig return 0; 300c66ac9dbSNicholas Bellinger } 301c66ac9dbSNicholas Bellinger 30214150a6bSChristoph Hellwig static int iblock_execute_unmap(struct se_cmd *cmd) 303c66ac9dbSNicholas Bellinger { 30414150a6bSChristoph Hellwig struct se_device *dev = cmd->se_dev; 3050fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 30614150a6bSChristoph Hellwig unsigned char *buf, *ptr = NULL; 30714150a6bSChristoph Hellwig sector_t lba; 3080d7f1299SPaolo Bonzini int size; 309b7fc7f37SRoland Dreier u32 range; 310b7fc7f37SRoland Dreier int ret = 0; 311b7fc7f37SRoland Dreier int dl, bd_dl; 31214150a6bSChristoph Hellwig 3130d7f1299SPaolo Bonzini if (cmd->data_length < 8) { 3140d7f1299SPaolo Bonzini pr_warn("UNMAP parameter list length %u too small\n", 3150d7f1299SPaolo Bonzini cmd->data_length); 3160d7f1299SPaolo Bonzini cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 3170d7f1299SPaolo Bonzini return -EINVAL; 3180d7f1299SPaolo Bonzini } 3190d7f1299SPaolo Bonzini 32014150a6bSChristoph Hellwig buf = transport_kmap_data_sg(cmd); 32114150a6bSChristoph Hellwig 3221a5fa457SRoland Dreier dl = get_unaligned_be16(&buf[0]); 3231a5fa457SRoland Dreier bd_dl = get_unaligned_be16(&buf[2]); 3241a5fa457SRoland Dreier 3250d7f1299SPaolo Bonzini size = cmd->data_length - 8; 3260d7f1299SPaolo Bonzini if (bd_dl > size) 3270d7f1299SPaolo Bonzini pr_warn("UNMAP parameter list length %u too small, ignoring bd_dl %u\n", 3280d7f1299SPaolo Bonzini cmd->data_length, bd_dl); 3290d7f1299SPaolo Bonzini else 3300d7f1299SPaolo Bonzini size = bd_dl; 3310d7f1299SPaolo Bonzini 3320fd97ccfSChristoph Hellwig if (size / 16 > dev->dev_attrib.max_unmap_block_desc_count) { 3337409a665SRoland Dreier cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 3347409a665SRoland Dreier ret = -EINVAL; 3357409a665SRoland Dreier goto err; 3367409a665SRoland Dreier } 337b7fc7f37SRoland Dreier 338b7fc7f37SRoland Dreier /* First UNMAP block descriptor starts at 8 byte offset */ 339b7fc7f37SRoland Dreier ptr = &buf[8]; 340b7fc7f37SRoland Dreier pr_debug("UNMAP: Sub: %s Using dl: %u bd_dl: %u size: %u" 34114150a6bSChristoph Hellwig " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 34214150a6bSChristoph Hellwig 343b7fc7f37SRoland Dreier while (size >= 16) { 34414150a6bSChristoph Hellwig lba = get_unaligned_be64(&ptr[0]); 34514150a6bSChristoph Hellwig range = get_unaligned_be32(&ptr[8]); 34614150a6bSChristoph Hellwig pr_debug("UNMAP: Using lba: %llu and range: %u\n", 34714150a6bSChristoph Hellwig (unsigned long long)lba, range); 34814150a6bSChristoph Hellwig 3490fd97ccfSChristoph Hellwig if (range > dev->dev_attrib.max_unmap_lba_count) { 3502594e298SRoland Dreier cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; 3512594e298SRoland Dreier ret = -EINVAL; 3522594e298SRoland Dreier goto err; 3532594e298SRoland Dreier } 3542594e298SRoland Dreier 3552594e298SRoland Dreier if (lba + range > dev->transport->get_blocks(dev) + 1) { 3562594e298SRoland Dreier cmd->scsi_sense_reason = TCM_ADDRESS_OUT_OF_RANGE; 3572594e298SRoland Dreier ret = -EINVAL; 3582594e298SRoland Dreier goto err; 3592594e298SRoland Dreier } 3602594e298SRoland Dreier 3610fd97ccfSChristoph Hellwig ret = blkdev_issue_discard(ib_dev->ibd_bd, lba, range, 36214150a6bSChristoph Hellwig GFP_KERNEL, 0); 36314150a6bSChristoph Hellwig if (ret < 0) { 36414150a6bSChristoph Hellwig pr_err("blkdev_issue_discard() failed: %d\n", 36514150a6bSChristoph Hellwig ret); 36614150a6bSChristoph Hellwig goto err; 36714150a6bSChristoph Hellwig } 36814150a6bSChristoph Hellwig 36914150a6bSChristoph Hellwig ptr += 16; 37014150a6bSChristoph Hellwig size -= 16; 37114150a6bSChristoph Hellwig } 37214150a6bSChristoph Hellwig 37314150a6bSChristoph Hellwig err: 37414150a6bSChristoph Hellwig transport_kunmap_data_sg(cmd); 37514150a6bSChristoph Hellwig if (!ret) 37614150a6bSChristoph Hellwig target_complete_cmd(cmd, GOOD); 37714150a6bSChristoph Hellwig return ret; 378c66ac9dbSNicholas Bellinger } 379c66ac9dbSNicholas Bellinger 3806f974e8cSChristoph Hellwig static int iblock_execute_write_same(struct se_cmd *cmd) 3816f974e8cSChristoph Hellwig { 3820fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev); 3836f974e8cSChristoph Hellwig int ret; 3846f974e8cSChristoph Hellwig 3850fd97ccfSChristoph Hellwig ret = blkdev_issue_discard(ib_dev->ibd_bd, cmd->t_task_lba, 3866f974e8cSChristoph Hellwig spc_get_write_same_sectors(cmd), GFP_KERNEL, 3876f974e8cSChristoph Hellwig 0); 3886f974e8cSChristoph Hellwig if (ret < 0) { 3896f974e8cSChristoph Hellwig pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 3906f974e8cSChristoph Hellwig return ret; 3916f974e8cSChristoph Hellwig } 3926f974e8cSChristoph Hellwig 3936f974e8cSChristoph Hellwig target_complete_cmd(cmd, GOOD); 3946f974e8cSChristoph Hellwig return 0; 3956f974e8cSChristoph Hellwig } 3966f974e8cSChristoph Hellwig 397c66ac9dbSNicholas Bellinger enum { 39844bfd018SAndy Grover Opt_udev_path, Opt_readonly, Opt_force, Opt_err 399c66ac9dbSNicholas Bellinger }; 400c66ac9dbSNicholas Bellinger 401c66ac9dbSNicholas Bellinger static match_table_t tokens = { 402c66ac9dbSNicholas Bellinger {Opt_udev_path, "udev_path=%s"}, 40344bfd018SAndy Grover {Opt_readonly, "readonly=%d"}, 404c66ac9dbSNicholas Bellinger {Opt_force, "force=%d"}, 405c66ac9dbSNicholas Bellinger {Opt_err, NULL} 406c66ac9dbSNicholas Bellinger }; 407c66ac9dbSNicholas Bellinger 4080fd97ccfSChristoph Hellwig static ssize_t iblock_set_configfs_dev_params(struct se_device *dev, 409c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 410c66ac9dbSNicholas Bellinger { 4110fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 4126d180253SJesper Juhl char *orig, *ptr, *arg_p, *opts; 413c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 41421bca31cSRoland Dreier int ret = 0, token; 41544bfd018SAndy Grover unsigned long tmp_readonly; 416c66ac9dbSNicholas Bellinger 417c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 418c66ac9dbSNicholas Bellinger if (!opts) 419c66ac9dbSNicholas Bellinger return -ENOMEM; 420c66ac9dbSNicholas Bellinger 421c66ac9dbSNicholas Bellinger orig = opts; 422c66ac9dbSNicholas Bellinger 42390c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 424c66ac9dbSNicholas Bellinger if (!*ptr) 425c66ac9dbSNicholas Bellinger continue; 426c66ac9dbSNicholas Bellinger 427c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 428c66ac9dbSNicholas Bellinger switch (token) { 429c66ac9dbSNicholas Bellinger case Opt_udev_path: 430c66ac9dbSNicholas Bellinger if (ib_dev->ibd_bd) { 4316708bb27SAndy Grover pr_err("Unable to set udev_path= while" 432c66ac9dbSNicholas Bellinger " ib_dev->ibd_bd exists\n"); 433c66ac9dbSNicholas Bellinger ret = -EEXIST; 434c66ac9dbSNicholas Bellinger goto out; 435c66ac9dbSNicholas Bellinger } 436852b6ed1SNicholas Bellinger if (match_strlcpy(ib_dev->ibd_udev_path, &args[0], 437852b6ed1SNicholas Bellinger SE_UDEV_PATH_LEN) == 0) { 438852b6ed1SNicholas Bellinger ret = -EINVAL; 4396d180253SJesper Juhl break; 4406d180253SJesper Juhl } 4416708bb27SAndy Grover pr_debug("IBLOCK: Referencing UDEV path: %s\n", 442c66ac9dbSNicholas Bellinger ib_dev->ibd_udev_path); 443c66ac9dbSNicholas Bellinger ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH; 444c66ac9dbSNicholas Bellinger break; 44544bfd018SAndy Grover case Opt_readonly: 44644bfd018SAndy Grover arg_p = match_strdup(&args[0]); 44744bfd018SAndy Grover if (!arg_p) { 44844bfd018SAndy Grover ret = -ENOMEM; 44944bfd018SAndy Grover break; 45044bfd018SAndy Grover } 45144bfd018SAndy Grover ret = strict_strtoul(arg_p, 0, &tmp_readonly); 45244bfd018SAndy Grover kfree(arg_p); 45344bfd018SAndy Grover if (ret < 0) { 45444bfd018SAndy Grover pr_err("strict_strtoul() failed for" 45544bfd018SAndy Grover " readonly=\n"); 45644bfd018SAndy Grover goto out; 45744bfd018SAndy Grover } 45844bfd018SAndy Grover ib_dev->ibd_readonly = tmp_readonly; 45944bfd018SAndy Grover pr_debug("IBLOCK: readonly: %d\n", ib_dev->ibd_readonly); 46044bfd018SAndy Grover break; 461c66ac9dbSNicholas Bellinger case Opt_force: 462c66ac9dbSNicholas Bellinger break; 463c66ac9dbSNicholas Bellinger default: 464c66ac9dbSNicholas Bellinger break; 465c66ac9dbSNicholas Bellinger } 466c66ac9dbSNicholas Bellinger } 467c66ac9dbSNicholas Bellinger 468c66ac9dbSNicholas Bellinger out: 469c66ac9dbSNicholas Bellinger kfree(orig); 470c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 471c66ac9dbSNicholas Bellinger } 472c66ac9dbSNicholas Bellinger 4730fd97ccfSChristoph Hellwig static ssize_t iblock_show_configfs_dev_params(struct se_device *dev, char *b) 474c66ac9dbSNicholas Bellinger { 4750fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 4760fd97ccfSChristoph Hellwig struct block_device *bd = ib_dev->ibd_bd; 477c66ac9dbSNicholas Bellinger char buf[BDEVNAME_SIZE]; 478c66ac9dbSNicholas Bellinger ssize_t bl = 0; 479c66ac9dbSNicholas Bellinger 480c66ac9dbSNicholas Bellinger if (bd) 481c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "iBlock device: %s", 482c66ac9dbSNicholas Bellinger bdevname(bd, buf)); 4830fd97ccfSChristoph Hellwig if (ib_dev->ibd_flags & IBDF_HAS_UDEV_PATH) 48444bfd018SAndy Grover bl += sprintf(b + bl, " UDEV PATH: %s", 4850fd97ccfSChristoph Hellwig ib_dev->ibd_udev_path); 4860fd97ccfSChristoph Hellwig bl += sprintf(b + bl, " readonly: %d\n", ib_dev->ibd_readonly); 487c66ac9dbSNicholas Bellinger 488c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " "); 489c66ac9dbSNicholas Bellinger if (bd) { 490c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, "Major: %d Minor: %d %s\n", 49121bca31cSRoland Dreier MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ? 4920fd97ccfSChristoph Hellwig "" : (bd->bd_holder == ib_dev) ? 493c66ac9dbSNicholas Bellinger "CLAIMED: IBLOCK" : "CLAIMED: OS"); 494c66ac9dbSNicholas Bellinger } else { 49521bca31cSRoland Dreier bl += sprintf(b + bl, "Major: 0 Minor: 0\n"); 496c66ac9dbSNicholas Bellinger } 497c66ac9dbSNicholas Bellinger 498c66ac9dbSNicholas Bellinger return bl; 499c66ac9dbSNicholas Bellinger } 500c66ac9dbSNicholas Bellinger 5015787cacdSChristoph Hellwig static void iblock_complete_cmd(struct se_cmd *cmd) 5025787cacdSChristoph Hellwig { 5035787cacdSChristoph Hellwig struct iblock_req *ibr = cmd->priv; 5045787cacdSChristoph Hellwig u8 status; 5055787cacdSChristoph Hellwig 5065787cacdSChristoph Hellwig if (!atomic_dec_and_test(&ibr->pending)) 5075787cacdSChristoph Hellwig return; 5085787cacdSChristoph Hellwig 5095787cacdSChristoph Hellwig if (atomic_read(&ibr->ib_bio_err_cnt)) 5105787cacdSChristoph Hellwig status = SAM_STAT_CHECK_CONDITION; 5115787cacdSChristoph Hellwig else 5125787cacdSChristoph Hellwig status = SAM_STAT_GOOD; 5135787cacdSChristoph Hellwig 5145787cacdSChristoph Hellwig target_complete_cmd(cmd, status); 5155787cacdSChristoph Hellwig kfree(ibr); 5165787cacdSChristoph Hellwig } 5175787cacdSChristoph Hellwig 518dbbf3e94SChristoph Hellwig static struct bio * 5195787cacdSChristoph Hellwig iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num) 520c66ac9dbSNicholas Bellinger { 5210fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev); 522c66ac9dbSNicholas Bellinger struct bio *bio; 523c66ac9dbSNicholas Bellinger 5245c55125fSChristoph Hellwig /* 5255c55125fSChristoph Hellwig * Only allocate as many vector entries as the bio code allows us to, 5265c55125fSChristoph Hellwig * we'll loop later on until we have handled the whole request. 5275c55125fSChristoph Hellwig */ 5285c55125fSChristoph Hellwig if (sg_num > BIO_MAX_PAGES) 5295c55125fSChristoph Hellwig sg_num = BIO_MAX_PAGES; 5305c55125fSChristoph Hellwig 531c66ac9dbSNicholas Bellinger bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set); 5326708bb27SAndy Grover if (!bio) { 5336708bb27SAndy Grover pr_err("Unable to allocate memory for bio\n"); 534c66ac9dbSNicholas Bellinger return NULL; 535c66ac9dbSNicholas Bellinger } 536c66ac9dbSNicholas Bellinger 537c66ac9dbSNicholas Bellinger bio->bi_bdev = ib_dev->ibd_bd; 5385787cacdSChristoph Hellwig bio->bi_private = cmd; 539c66ac9dbSNicholas Bellinger bio->bi_end_io = &iblock_bio_done; 540c66ac9dbSNicholas Bellinger bio->bi_sector = lba; 541c66ac9dbSNicholas Bellinger return bio; 542c66ac9dbSNicholas Bellinger } 543c66ac9dbSNicholas Bellinger 544d5b4a21bSChristoph Hellwig static void iblock_submit_bios(struct bio_list *list, int rw) 545d5b4a21bSChristoph Hellwig { 546d5b4a21bSChristoph Hellwig struct blk_plug plug; 547d5b4a21bSChristoph Hellwig struct bio *bio; 548d5b4a21bSChristoph Hellwig 549d5b4a21bSChristoph Hellwig blk_start_plug(&plug); 550d5b4a21bSChristoph Hellwig while ((bio = bio_list_pop(list))) 551d5b4a21bSChristoph Hellwig submit_bio(rw, bio); 552d5b4a21bSChristoph Hellwig blk_finish_plug(&plug); 553d5b4a21bSChristoph Hellwig } 554d5b4a21bSChristoph Hellwig 5550c2ad7d1SChristoph Hellwig static int iblock_execute_rw(struct se_cmd *cmd) 556c66ac9dbSNicholas Bellinger { 5570c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 5580c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 5590c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 5605951146dSAndy Grover struct se_device *dev = cmd->se_dev; 5615787cacdSChristoph Hellwig struct iblock_req *ibr; 562dbbf3e94SChristoph Hellwig struct bio *bio; 563dbbf3e94SChristoph Hellwig struct bio_list list; 564c66ac9dbSNicholas Bellinger struct scatterlist *sg; 5655787cacdSChristoph Hellwig u32 sg_num = sgl_nents; 566c66ac9dbSNicholas Bellinger sector_t block_lba; 567d5b4a21bSChristoph Hellwig unsigned bio_cnt; 568dbbf3e94SChristoph Hellwig int rw; 5695787cacdSChristoph Hellwig int i; 570dbbf3e94SChristoph Hellwig 5715787cacdSChristoph Hellwig if (data_direction == DMA_TO_DEVICE) { 572dbbf3e94SChristoph Hellwig /* 573dbbf3e94SChristoph Hellwig * Force data to disk if we pretend to not have a volatile 574dbbf3e94SChristoph Hellwig * write cache, or the initiator set the Force Unit Access bit. 575dbbf3e94SChristoph Hellwig */ 5760fd97ccfSChristoph Hellwig if (dev->dev_attrib.emulate_write_cache == 0 || 5770fd97ccfSChristoph Hellwig (dev->dev_attrib.emulate_fua_write > 0 && 5782d3a4b51SChristoph Hellwig (cmd->se_cmd_flags & SCF_FUA))) 579dbbf3e94SChristoph Hellwig rw = WRITE_FUA; 580dbbf3e94SChristoph Hellwig else 581dbbf3e94SChristoph Hellwig rw = WRITE; 582dbbf3e94SChristoph Hellwig } else { 583dbbf3e94SChristoph Hellwig rw = READ; 584dbbf3e94SChristoph Hellwig } 585dbbf3e94SChristoph Hellwig 586c66ac9dbSNicholas Bellinger /* 5875787cacdSChristoph Hellwig * Convert the blocksize advertised to the initiator to the 512 byte 5885787cacdSChristoph Hellwig * units unconditionally used by the Linux block layer. 589c66ac9dbSNicholas Bellinger */ 5900fd97ccfSChristoph Hellwig if (dev->dev_attrib.block_size == 4096) 59172a0e5e2SChristoph Hellwig block_lba = (cmd->t_task_lba << 3); 5920fd97ccfSChristoph Hellwig else if (dev->dev_attrib.block_size == 2048) 59372a0e5e2SChristoph Hellwig block_lba = (cmd->t_task_lba << 2); 5940fd97ccfSChristoph Hellwig else if (dev->dev_attrib.block_size == 1024) 59572a0e5e2SChristoph Hellwig block_lba = (cmd->t_task_lba << 1); 5960fd97ccfSChristoph Hellwig else if (dev->dev_attrib.block_size == 512) 59772a0e5e2SChristoph Hellwig block_lba = cmd->t_task_lba; 598c66ac9dbSNicholas Bellinger else { 5996708bb27SAndy Grover pr_err("Unsupported SCSI -> BLOCK LBA conversion:" 6000fd97ccfSChristoph Hellwig " %u\n", dev->dev_attrib.block_size); 60103e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 60203e98c9eSNicholas Bellinger return -ENOSYS; 603c66ac9dbSNicholas Bellinger } 604c66ac9dbSNicholas Bellinger 6055787cacdSChristoph Hellwig ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL); 6065787cacdSChristoph Hellwig if (!ibr) 6075787cacdSChristoph Hellwig goto fail; 6085787cacdSChristoph Hellwig cmd->priv = ibr; 6095787cacdSChristoph Hellwig 610e0de4457SPaolo Bonzini if (!sgl_nents) { 611e0de4457SPaolo Bonzini atomic_set(&ibr->pending, 1); 612e0de4457SPaolo Bonzini iblock_complete_cmd(cmd); 613e0de4457SPaolo Bonzini return 0; 614e0de4457SPaolo Bonzini } 615e0de4457SPaolo Bonzini 6165787cacdSChristoph Hellwig bio = iblock_get_bio(cmd, block_lba, sgl_nents); 6175787cacdSChristoph Hellwig if (!bio) 6185787cacdSChristoph Hellwig goto fail_free_ibr; 619c66ac9dbSNicholas Bellinger 620dbbf3e94SChristoph Hellwig bio_list_init(&list); 621dbbf3e94SChristoph Hellwig bio_list_add(&list, bio); 6225787cacdSChristoph Hellwig 6235787cacdSChristoph Hellwig atomic_set(&ibr->pending, 2); 624d5b4a21bSChristoph Hellwig bio_cnt = 1; 625dbbf3e94SChristoph Hellwig 6265787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 627dbbf3e94SChristoph Hellwig /* 628dbbf3e94SChristoph Hellwig * XXX: if the length the device accepts is shorter than the 629dbbf3e94SChristoph Hellwig * length of the S/G list entry this will cause and 630dbbf3e94SChristoph Hellwig * endless loop. Better hope no driver uses huge pages. 631dbbf3e94SChristoph Hellwig */ 632dbbf3e94SChristoph Hellwig while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) 633dbbf3e94SChristoph Hellwig != sg->length) { 634d5b4a21bSChristoph Hellwig if (bio_cnt >= IBLOCK_MAX_BIO_PER_TASK) { 635d5b4a21bSChristoph Hellwig iblock_submit_bios(&list, rw); 636d5b4a21bSChristoph Hellwig bio_cnt = 0; 637d5b4a21bSChristoph Hellwig } 638d5b4a21bSChristoph Hellwig 6395787cacdSChristoph Hellwig bio = iblock_get_bio(cmd, block_lba, sg_num); 6406708bb27SAndy Grover if (!bio) 6415787cacdSChristoph Hellwig goto fail_put_bios; 6425787cacdSChristoph Hellwig 6435787cacdSChristoph Hellwig atomic_inc(&ibr->pending); 644dbbf3e94SChristoph Hellwig bio_list_add(&list, bio); 645d5b4a21bSChristoph Hellwig bio_cnt++; 646c66ac9dbSNicholas Bellinger } 647dbbf3e94SChristoph Hellwig 648c66ac9dbSNicholas Bellinger /* Always in 512 byte units for Linux/Block */ 649c66ac9dbSNicholas Bellinger block_lba += sg->length >> IBLOCK_LBA_SHIFT; 650c66ac9dbSNicholas Bellinger sg_num--; 651c66ac9dbSNicholas Bellinger } 652c66ac9dbSNicholas Bellinger 653d5b4a21bSChristoph Hellwig iblock_submit_bios(&list, rw); 6545787cacdSChristoph Hellwig iblock_complete_cmd(cmd); 65503e98c9eSNicholas Bellinger return 0; 656dbbf3e94SChristoph Hellwig 6575787cacdSChristoph Hellwig fail_put_bios: 658dbbf3e94SChristoph Hellwig while ((bio = bio_list_pop(&list))) 659c66ac9dbSNicholas Bellinger bio_put(bio); 6605787cacdSChristoph Hellwig fail_free_ibr: 6615787cacdSChristoph Hellwig kfree(ibr); 66203e98c9eSNicholas Bellinger cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 6635787cacdSChristoph Hellwig fail: 66403e98c9eSNicholas Bellinger return -ENOMEM; 665c66ac9dbSNicholas Bellinger } 666c66ac9dbSNicholas Bellinger 667c66ac9dbSNicholas Bellinger static sector_t iblock_get_blocks(struct se_device *dev) 668c66ac9dbSNicholas Bellinger { 6690fd97ccfSChristoph Hellwig struct iblock_dev *ib_dev = IBLOCK_DEV(dev); 6700fd97ccfSChristoph Hellwig struct block_device *bd = ib_dev->ibd_bd; 671c66ac9dbSNicholas Bellinger struct request_queue *q = bdev_get_queue(bd); 672c66ac9dbSNicholas Bellinger 673c66ac9dbSNicholas Bellinger return iblock_emulate_read_cap_with_block_size(dev, bd, q); 674c66ac9dbSNicholas Bellinger } 675c66ac9dbSNicholas Bellinger 676c66ac9dbSNicholas Bellinger static void iblock_bio_done(struct bio *bio, int err) 677c66ac9dbSNicholas Bellinger { 6785787cacdSChristoph Hellwig struct se_cmd *cmd = bio->bi_private; 6795787cacdSChristoph Hellwig struct iblock_req *ibr = cmd->priv; 680dbbf3e94SChristoph Hellwig 681c66ac9dbSNicholas Bellinger /* 682c66ac9dbSNicholas Bellinger * Set -EIO if !BIO_UPTODATE and the passed is still err=0 683c66ac9dbSNicholas Bellinger */ 6846708bb27SAndy Grover if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err) 685c66ac9dbSNicholas Bellinger err = -EIO; 686c66ac9dbSNicholas Bellinger 687c66ac9dbSNicholas Bellinger if (err != 0) { 6886708bb27SAndy Grover pr_err("test_bit(BIO_UPTODATE) failed for bio: %p," 689c66ac9dbSNicholas Bellinger " err: %d\n", bio, err); 690c66ac9dbSNicholas Bellinger /* 691c66ac9dbSNicholas Bellinger * Bump the ib_bio_err_cnt and release bio. 692c66ac9dbSNicholas Bellinger */ 693c66ac9dbSNicholas Bellinger atomic_inc(&ibr->ib_bio_err_cnt); 694c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 695dbbf3e94SChristoph Hellwig } 696dbbf3e94SChristoph Hellwig 697c66ac9dbSNicholas Bellinger bio_put(bio); 698dbbf3e94SChristoph Hellwig 6995787cacdSChristoph Hellwig iblock_complete_cmd(cmd); 700c66ac9dbSNicholas Bellinger } 701c66ac9dbSNicholas Bellinger 7029e999a6cSChristoph Hellwig static struct sbc_ops iblock_sbc_ops = { 7030c2ad7d1SChristoph Hellwig .execute_rw = iblock_execute_rw, 704ad67f0d9SChristoph Hellwig .execute_sync_cache = iblock_execute_sync_cache, 7056f974e8cSChristoph Hellwig .execute_write_same = iblock_execute_write_same, 70614150a6bSChristoph Hellwig .execute_unmap = iblock_execute_unmap, 7070c2ad7d1SChristoph Hellwig }; 7080c2ad7d1SChristoph Hellwig 7090c2ad7d1SChristoph Hellwig static int iblock_parse_cdb(struct se_cmd *cmd) 7100c2ad7d1SChristoph Hellwig { 7119e999a6cSChristoph Hellwig return sbc_parse_cdb(cmd, &iblock_sbc_ops); 7120c2ad7d1SChristoph Hellwig } 7130c2ad7d1SChristoph Hellwig 714c66ac9dbSNicholas Bellinger static struct se_subsystem_api iblock_template = { 715c66ac9dbSNicholas Bellinger .name = "iblock", 7160fd97ccfSChristoph Hellwig .inquiry_prod = "IBLOCK", 7170fd97ccfSChristoph Hellwig .inquiry_rev = IBLOCK_VERSION, 718c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 719c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, 720c66ac9dbSNicholas Bellinger .attach_hba = iblock_attach_hba, 721c66ac9dbSNicholas Bellinger .detach_hba = iblock_detach_hba, 7220fd97ccfSChristoph Hellwig .alloc_device = iblock_alloc_device, 7230fd97ccfSChristoph Hellwig .configure_device = iblock_configure_device, 724c66ac9dbSNicholas Bellinger .free_device = iblock_free_device, 7250c2ad7d1SChristoph Hellwig .parse_cdb = iblock_parse_cdb, 726c66ac9dbSNicholas Bellinger .set_configfs_dev_params = iblock_set_configfs_dev_params, 727c66ac9dbSNicholas Bellinger .show_configfs_dev_params = iblock_show_configfs_dev_params, 7286f23ac8aSChristoph Hellwig .get_device_rev = sbc_get_device_rev, 7296f23ac8aSChristoph Hellwig .get_device_type = sbc_get_device_type, 730c66ac9dbSNicholas Bellinger .get_blocks = iblock_get_blocks, 731c66ac9dbSNicholas Bellinger }; 732c66ac9dbSNicholas Bellinger 733c66ac9dbSNicholas Bellinger static int __init iblock_module_init(void) 734c66ac9dbSNicholas Bellinger { 735c66ac9dbSNicholas Bellinger return transport_subsystem_register(&iblock_template); 736c66ac9dbSNicholas Bellinger } 737c66ac9dbSNicholas Bellinger 738c66ac9dbSNicholas Bellinger static void iblock_module_exit(void) 739c66ac9dbSNicholas Bellinger { 740c66ac9dbSNicholas Bellinger transport_subsystem_release(&iblock_template); 741c66ac9dbSNicholas Bellinger } 742c66ac9dbSNicholas Bellinger 743c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin"); 744c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 745c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 746c66ac9dbSNicholas Bellinger 747c66ac9dbSNicholas Bellinger module_init(iblock_module_init); 748c66ac9dbSNicholas Bellinger module_exit(iblock_module_exit); 749