1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_file.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains the Storage Engine <-> FILEIO transport specific functions 5c66ac9dbSNicholas Bellinger * 6fd9a11d7SNicholas Bellinger * (c) Copyright 2005-2012 RisingTide Systems LLC. 7c66ac9dbSNicholas Bellinger * 8c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13c66ac9dbSNicholas Bellinger * (at your option) any later version. 14c66ac9dbSNicholas Bellinger * 15c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 19c66ac9dbSNicholas Bellinger * 20c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 21c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 22c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23c66ac9dbSNicholas Bellinger * 24c66ac9dbSNicholas Bellinger ******************************************************************************/ 25c66ac9dbSNicholas Bellinger 26c66ac9dbSNicholas Bellinger #include <linux/string.h> 27c66ac9dbSNicholas Bellinger #include <linux/parser.h> 28c66ac9dbSNicholas Bellinger #include <linux/timer.h> 29c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 30c66ac9dbSNicholas Bellinger #include <linux/slab.h> 31c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 32827509e3SPaul Gortmaker #include <linux/module.h> 3370d3ae5cSAsias He #include <linux/falloc.h> 34c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 35c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 36c66ac9dbSNicholas Bellinger 37c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 38c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 39c66ac9dbSNicholas Bellinger 40c66ac9dbSNicholas Bellinger #include "target_core_file.h" 41c66ac9dbSNicholas Bellinger 420fd97ccfSChristoph Hellwig static inline struct fd_dev *FD_DEV(struct se_device *dev) 430fd97ccfSChristoph Hellwig { 440fd97ccfSChristoph Hellwig return container_of(dev, struct fd_dev, dev); 450fd97ccfSChristoph Hellwig } 46c66ac9dbSNicholas Bellinger 47c66ac9dbSNicholas Bellinger /* fd_attach_hba(): (Part of se_subsystem_api_t template) 48c66ac9dbSNicholas Bellinger * 49c66ac9dbSNicholas Bellinger * 50c66ac9dbSNicholas Bellinger */ 51c66ac9dbSNicholas Bellinger static int fd_attach_hba(struct se_hba *hba, u32 host_id) 52c66ac9dbSNicholas Bellinger { 53c66ac9dbSNicholas Bellinger struct fd_host *fd_host; 54c66ac9dbSNicholas Bellinger 55c66ac9dbSNicholas Bellinger fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); 566708bb27SAndy Grover if (!fd_host) { 576708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_host\n"); 58e3d6f909SAndy Grover return -ENOMEM; 59c66ac9dbSNicholas Bellinger } 60c66ac9dbSNicholas Bellinger 61c66ac9dbSNicholas Bellinger fd_host->fd_host_id = host_id; 62c66ac9dbSNicholas Bellinger 63e3d6f909SAndy Grover hba->hba_ptr = fd_host; 64c66ac9dbSNicholas Bellinger 656708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" 66c66ac9dbSNicholas Bellinger " Target Core Stack %s\n", hba->hba_id, FD_VERSION, 67c66ac9dbSNicholas Bellinger TARGET_CORE_MOD_VERSION); 686708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic" 69e3d6f909SAndy Grover " MaxSectors: %u\n", 70e3d6f909SAndy Grover hba->hba_id, fd_host->fd_host_id, FD_MAX_SECTORS); 71c66ac9dbSNicholas Bellinger 72c66ac9dbSNicholas Bellinger return 0; 73c66ac9dbSNicholas Bellinger } 74c66ac9dbSNicholas Bellinger 75c66ac9dbSNicholas Bellinger static void fd_detach_hba(struct se_hba *hba) 76c66ac9dbSNicholas Bellinger { 77c66ac9dbSNicholas Bellinger struct fd_host *fd_host = hba->hba_ptr; 78c66ac9dbSNicholas Bellinger 796708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" 80c66ac9dbSNicholas Bellinger " Target Core\n", hba->hba_id, fd_host->fd_host_id); 81c66ac9dbSNicholas Bellinger 82c66ac9dbSNicholas Bellinger kfree(fd_host); 83c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 84c66ac9dbSNicholas Bellinger } 85c66ac9dbSNicholas Bellinger 860fd97ccfSChristoph Hellwig static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) 87c66ac9dbSNicholas Bellinger { 88c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev; 898359cf43SJörn Engel struct fd_host *fd_host = hba->hba_ptr; 90c66ac9dbSNicholas Bellinger 91c66ac9dbSNicholas Bellinger fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); 926708bb27SAndy Grover if (!fd_dev) { 936708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_dev\n"); 94c66ac9dbSNicholas Bellinger return NULL; 95c66ac9dbSNicholas Bellinger } 96c66ac9dbSNicholas Bellinger 97c66ac9dbSNicholas Bellinger fd_dev->fd_host = fd_host; 98c66ac9dbSNicholas Bellinger 996708bb27SAndy Grover pr_debug("FILEIO: Allocated fd_dev for %p\n", name); 100c66ac9dbSNicholas Bellinger 1010fd97ccfSChristoph Hellwig return &fd_dev->dev; 102c66ac9dbSNicholas Bellinger } 103c66ac9dbSNicholas Bellinger 1040fd97ccfSChristoph Hellwig static int fd_configure_device(struct se_device *dev) 105c66ac9dbSNicholas Bellinger { 1060fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 1070fd97ccfSChristoph Hellwig struct fd_host *fd_host = dev->se_hba->hba_ptr; 108c66ac9dbSNicholas Bellinger struct file *file; 109c66ac9dbSNicholas Bellinger struct inode *inode = NULL; 1100fd97ccfSChristoph Hellwig int flags, ret = -EINVAL; 111c66ac9dbSNicholas Bellinger 1120fd97ccfSChristoph Hellwig if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { 1130fd97ccfSChristoph Hellwig pr_err("Missing fd_dev_name=\n"); 1140fd97ccfSChristoph Hellwig return -EINVAL; 1150fd97ccfSChristoph Hellwig } 116c66ac9dbSNicholas Bellinger 117c66ac9dbSNicholas Bellinger /* 118a4dff304SNicholas Bellinger * Use O_DSYNC by default instead of O_SYNC to forgo syncing 119a4dff304SNicholas Bellinger * of pure timestamp updates. 120c66ac9dbSNicholas Bellinger */ 121a4dff304SNicholas Bellinger flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; 1220fd97ccfSChristoph Hellwig 123b32f4c7eSNicholas Bellinger /* 124b32f4c7eSNicholas Bellinger * Optionally allow fd_buffered_io=1 to be enabled for people 125b32f4c7eSNicholas Bellinger * who want use the fs buffer cache as an WriteCache mechanism. 126b32f4c7eSNicholas Bellinger * 127b32f4c7eSNicholas Bellinger * This means that in event of a hard failure, there is a risk 128b32f4c7eSNicholas Bellinger * of silent data-loss if the SCSI client has *not* performed a 129b32f4c7eSNicholas Bellinger * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE 130b32f4c7eSNicholas Bellinger * to write-out the entire device cache. 131b32f4c7eSNicholas Bellinger */ 132b32f4c7eSNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { 133b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); 134b32f4c7eSNicholas Bellinger flags &= ~O_DSYNC; 135b32f4c7eSNicholas Bellinger } 136c66ac9dbSNicholas Bellinger 137dbc6e022SAl Viro file = filp_open(fd_dev->fd_dev_name, flags, 0600); 138613640e4SNicholas Bellinger if (IS_ERR(file)) { 139dbc6e022SAl Viro pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); 140613640e4SNicholas Bellinger ret = PTR_ERR(file); 141613640e4SNicholas Bellinger goto fail; 142613640e4SNicholas Bellinger } 143c66ac9dbSNicholas Bellinger fd_dev->fd_file = file; 144c66ac9dbSNicholas Bellinger /* 145c66ac9dbSNicholas Bellinger * If using a block backend with this struct file, we extract 146c66ac9dbSNicholas Bellinger * fd_dev->fd_[block,dev]_size from struct block_device. 147c66ac9dbSNicholas Bellinger * 148c66ac9dbSNicholas Bellinger * Otherwise, we use the passed fd_size= from configfs 149c66ac9dbSNicholas Bellinger */ 150c66ac9dbSNicholas Bellinger inode = file->f_mapping->host; 151c66ac9dbSNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 1520fd97ccfSChristoph Hellwig struct request_queue *q = bdev_get_queue(inode->i_bdev); 153cd9323fdSNicholas Bellinger unsigned long long dev_size; 1540fd97ccfSChristoph Hellwig 1550fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = 1560fd97ccfSChristoph Hellwig bdev_logical_block_size(inode->i_bdev); 1570fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q); 1580fd97ccfSChristoph Hellwig 159c66ac9dbSNicholas Bellinger /* 160c66ac9dbSNicholas Bellinger * Determine the number of bytes from i_size_read() minus 161c66ac9dbSNicholas Bellinger * one (1) logical sector from underlying struct block_device 162c66ac9dbSNicholas Bellinger */ 163cd9323fdSNicholas Bellinger dev_size = (i_size_read(file->f_mapping->host) - 164c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 165c66ac9dbSNicholas Bellinger 1666708bb27SAndy Grover pr_debug("FILEIO: Using size: %llu bytes from struct" 167c66ac9dbSNicholas Bellinger " block_device blocks: %llu logical_block_size: %d\n", 168cd9323fdSNicholas Bellinger dev_size, div_u64(dev_size, fd_dev->fd_block_size), 169c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 17070d3ae5cSAsias He /* 17170d3ae5cSAsias He * Check if the underlying struct block_device request_queue supports 17270d3ae5cSAsias He * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM 17370d3ae5cSAsias He * in ATA and we need to set TPE=1 17470d3ae5cSAsias He */ 17570d3ae5cSAsias He if (blk_queue_discard(q)) { 17670d3ae5cSAsias He dev->dev_attrib.max_unmap_lba_count = 17770d3ae5cSAsias He q->limits.max_discard_sectors; 17870d3ae5cSAsias He /* 17970d3ae5cSAsias He * Currently hardcoded to 1 in Linux/SCSI code.. 18070d3ae5cSAsias He */ 18170d3ae5cSAsias He dev->dev_attrib.max_unmap_block_desc_count = 1; 18270d3ae5cSAsias He dev->dev_attrib.unmap_granularity = 18370d3ae5cSAsias He q->limits.discard_granularity >> 9; 18470d3ae5cSAsias He dev->dev_attrib.unmap_granularity_alignment = 18570d3ae5cSAsias He q->limits.discard_alignment; 18670d3ae5cSAsias He pr_debug("IFILE: BLOCK Discard support available," 18770d3ae5cSAsias He " disabled by default\n"); 18870d3ae5cSAsias He } 18970d3ae5cSAsias He /* 19070d3ae5cSAsias He * Enable write same emulation for IBLOCK and use 0xFFFF as 19170d3ae5cSAsias He * the smaller WRITE_SAME(10) only has a two-byte block count. 19270d3ae5cSAsias He */ 19370d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0xFFFF; 194c66ac9dbSNicholas Bellinger } else { 195c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { 1966708bb27SAndy Grover pr_err("FILEIO: Missing fd_dev_size=" 197c66ac9dbSNicholas Bellinger " parameter, and no backing struct" 198c66ac9dbSNicholas Bellinger " block_device\n"); 199c66ac9dbSNicholas Bellinger goto fail; 200c66ac9dbSNicholas Bellinger } 201c66ac9dbSNicholas Bellinger 2020fd97ccfSChristoph Hellwig dev->dev_attrib.hw_block_size = FD_BLOCKSIZE; 2030fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS; 20470d3ae5cSAsias He 20570d3ae5cSAsias He /* 20670d3ae5cSAsias He * Limit UNMAP emulation to 8k Number of LBAs (NoLB) 20770d3ae5cSAsias He */ 20870d3ae5cSAsias He dev->dev_attrib.max_unmap_lba_count = 0x2000; 20970d3ae5cSAsias He /* 21070d3ae5cSAsias He * Currently hardcoded to 1 in Linux/SCSI code.. 21170d3ae5cSAsias He */ 21270d3ae5cSAsias He dev->dev_attrib.max_unmap_block_desc_count = 1; 21370d3ae5cSAsias He dev->dev_attrib.unmap_granularity = 1; 21470d3ae5cSAsias He dev->dev_attrib.unmap_granularity_alignment = 0; 21570d3ae5cSAsias He 21670d3ae5cSAsias He /* 21770d3ae5cSAsias He * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) 21870d3ae5cSAsias He * based upon struct iovec limit for vfs_writev() 21970d3ae5cSAsias He */ 22070d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0x1000; 221c66ac9dbSNicholas Bellinger } 222c66ac9dbSNicholas Bellinger 2230fd97ccfSChristoph Hellwig fd_dev->fd_block_size = dev->dev_attrib.hw_block_size; 224c66ac9dbSNicholas Bellinger 2250fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; 226c66ac9dbSNicholas Bellinger 227b32f4c7eSNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { 228b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" 229b32f4c7eSNicholas Bellinger " with FDBD_HAS_BUFFERED_IO_WCE\n"); 2300fd97ccfSChristoph Hellwig dev->dev_attrib.emulate_write_cache = 1; 231b32f4c7eSNicholas Bellinger } 232b32f4c7eSNicholas Bellinger 233c66ac9dbSNicholas Bellinger fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; 234c66ac9dbSNicholas Bellinger fd_dev->fd_queue_depth = dev->queue_depth; 235c66ac9dbSNicholas Bellinger 2366708bb27SAndy Grover pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," 237c66ac9dbSNicholas Bellinger " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, 238c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size); 239c66ac9dbSNicholas Bellinger 2400fd97ccfSChristoph Hellwig return 0; 241c66ac9dbSNicholas Bellinger fail: 242c66ac9dbSNicholas Bellinger if (fd_dev->fd_file) { 243c66ac9dbSNicholas Bellinger filp_close(fd_dev->fd_file, NULL); 244c66ac9dbSNicholas Bellinger fd_dev->fd_file = NULL; 245c66ac9dbSNicholas Bellinger } 2460fd97ccfSChristoph Hellwig return ret; 247c66ac9dbSNicholas Bellinger } 248c66ac9dbSNicholas Bellinger 2490fd97ccfSChristoph Hellwig static void fd_free_device(struct se_device *dev) 250c66ac9dbSNicholas Bellinger { 2510fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 252c66ac9dbSNicholas Bellinger 253c66ac9dbSNicholas Bellinger if (fd_dev->fd_file) { 254c66ac9dbSNicholas Bellinger filp_close(fd_dev->fd_file, NULL); 255c66ac9dbSNicholas Bellinger fd_dev->fd_file = NULL; 256c66ac9dbSNicholas Bellinger } 257c66ac9dbSNicholas Bellinger 258c66ac9dbSNicholas Bellinger kfree(fd_dev); 259c66ac9dbSNicholas Bellinger } 260c66ac9dbSNicholas Bellinger 261778229afSSebastian Andrzej Siewior static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, 262778229afSSebastian Andrzej Siewior u32 sgl_nents, int is_write) 263c66ac9dbSNicholas Bellinger { 2645787cacdSChristoph Hellwig struct se_device *se_dev = cmd->se_dev; 2650fd97ccfSChristoph Hellwig struct fd_dev *dev = FD_DEV(se_dev); 2666708bb27SAndy Grover struct file *fd = dev->fd_file; 2675787cacdSChristoph Hellwig struct scatterlist *sg; 268c66ac9dbSNicholas Bellinger struct iovec *iov; 269c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 2700fd97ccfSChristoph Hellwig loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size); 271c66ac9dbSNicholas Bellinger int ret = 0, i; 272c66ac9dbSNicholas Bellinger 2735787cacdSChristoph Hellwig iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); 2746708bb27SAndy Grover if (!iov) { 2756708bb27SAndy Grover pr_err("Unable to allocate fd_do_readv iov[]\n"); 276e3d6f909SAndy Grover return -ENOMEM; 277c66ac9dbSNicholas Bellinger } 278c66ac9dbSNicholas Bellinger 2795787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 2809649fa1bSSebastian Andrzej Siewior iov[i].iov_len = sg->length; 28140ff2c3bSSebastian Andrzej Siewior iov[i].iov_base = kmap(sg_page(sg)) + sg->offset; 282c66ac9dbSNicholas Bellinger } 283c66ac9dbSNicholas Bellinger 284c66ac9dbSNicholas Bellinger old_fs = get_fs(); 285c66ac9dbSNicholas Bellinger set_fs(get_ds()); 286778229afSSebastian Andrzej Siewior 287778229afSSebastian Andrzej Siewior if (is_write) 288778229afSSebastian Andrzej Siewior ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); 289778229afSSebastian Andrzej Siewior else 2905787cacdSChristoph Hellwig ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); 291778229afSSebastian Andrzej Siewior 292c66ac9dbSNicholas Bellinger set_fs(old_fs); 293c66ac9dbSNicholas Bellinger 29440ff2c3bSSebastian Andrzej Siewior for_each_sg(sgl, sg, sgl_nents, i) 29540ff2c3bSSebastian Andrzej Siewior kunmap(sg_page(sg)); 296778229afSSebastian Andrzej Siewior 297c66ac9dbSNicholas Bellinger kfree(iov); 298778229afSSebastian Andrzej Siewior 299778229afSSebastian Andrzej Siewior if (is_write) { 300778229afSSebastian Andrzej Siewior if (ret < 0 || ret != cmd->data_length) { 301778229afSSebastian Andrzej Siewior pr_err("%s() write returned %d\n", __func__, ret); 302778229afSSebastian Andrzej Siewior return (ret < 0 ? ret : -EINVAL); 303778229afSSebastian Andrzej Siewior } 304778229afSSebastian Andrzej Siewior } else { 305c66ac9dbSNicholas Bellinger /* 306c66ac9dbSNicholas Bellinger * Return zeros and GOOD status even if the READ did not return 307c66ac9dbSNicholas Bellinger * the expected virt_size for struct file w/o a backing struct 308c66ac9dbSNicholas Bellinger * block_device. 309c66ac9dbSNicholas Bellinger */ 310496ad9aaSAl Viro if (S_ISBLK(file_inode(fd)->i_mode)) { 3115787cacdSChristoph Hellwig if (ret < 0 || ret != cmd->data_length) { 312778229afSSebastian Andrzej Siewior pr_err("%s() returned %d, expecting %u for " 313778229afSSebastian Andrzej Siewior "S_ISBLK\n", __func__, ret, 314778229afSSebastian Andrzej Siewior cmd->data_length); 315e3d6f909SAndy Grover return (ret < 0 ? ret : -EINVAL); 316c66ac9dbSNicholas Bellinger } 317c66ac9dbSNicholas Bellinger } else { 318c66ac9dbSNicholas Bellinger if (ret < 0) { 319778229afSSebastian Andrzej Siewior pr_err("%s() returned %d for non S_ISBLK\n", 320778229afSSebastian Andrzej Siewior __func__, ret); 321e3d6f909SAndy Grover return ret; 322c66ac9dbSNicholas Bellinger } 323c66ac9dbSNicholas Bellinger } 324c66ac9dbSNicholas Bellinger } 325c66ac9dbSNicholas Bellinger return 1; 326c66ac9dbSNicholas Bellinger } 327c66ac9dbSNicholas Bellinger 328de103c93SChristoph Hellwig static sense_reason_t 329de103c93SChristoph Hellwig fd_execute_sync_cache(struct se_cmd *cmd) 330c66ac9dbSNicholas Bellinger { 331c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 3320fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 333a1d8b49aSAndy Grover int immed = (cmd->t_task_cdb[1] & 0x2); 334c66ac9dbSNicholas Bellinger loff_t start, end; 335c66ac9dbSNicholas Bellinger int ret; 336c66ac9dbSNicholas Bellinger 337c66ac9dbSNicholas Bellinger /* 338c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 339c66ac9dbSNicholas Bellinger * for this SYNCHRONIZE_CACHE op 340c66ac9dbSNicholas Bellinger */ 341c66ac9dbSNicholas Bellinger if (immed) 3425787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 343c66ac9dbSNicholas Bellinger 344c66ac9dbSNicholas Bellinger /* 345c66ac9dbSNicholas Bellinger * Determine if we will be flushing the entire device. 346c66ac9dbSNicholas Bellinger */ 347a1d8b49aSAndy Grover if (cmd->t_task_lba == 0 && cmd->data_length == 0) { 348c66ac9dbSNicholas Bellinger start = 0; 349c66ac9dbSNicholas Bellinger end = LLONG_MAX; 350c66ac9dbSNicholas Bellinger } else { 3510fd97ccfSChristoph Hellwig start = cmd->t_task_lba * dev->dev_attrib.block_size; 352c66ac9dbSNicholas Bellinger if (cmd->data_length) 353c66ac9dbSNicholas Bellinger end = start + cmd->data_length; 354c66ac9dbSNicholas Bellinger else 355c66ac9dbSNicholas Bellinger end = LLONG_MAX; 356c66ac9dbSNicholas Bellinger } 357c66ac9dbSNicholas Bellinger 358c66ac9dbSNicholas Bellinger ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); 359c66ac9dbSNicholas Bellinger if (ret != 0) 3606708bb27SAndy Grover pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); 361c66ac9dbSNicholas Bellinger 3625787cacdSChristoph Hellwig if (immed) 363ad67f0d9SChristoph Hellwig return 0; 3645787cacdSChristoph Hellwig 365de103c93SChristoph Hellwig if (ret) 3665787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 367de103c93SChristoph Hellwig else 3685787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 369ad67f0d9SChristoph Hellwig 370ad67f0d9SChristoph Hellwig return 0; 371c66ac9dbSNicholas Bellinger } 372c66ac9dbSNicholas Bellinger 3737b745c84SNicholas Bellinger static unsigned char * 3747b745c84SNicholas Bellinger fd_setup_write_same_buf(struct se_cmd *cmd, struct scatterlist *sg, 3757b745c84SNicholas Bellinger unsigned int len) 3767b745c84SNicholas Bellinger { 3777b745c84SNicholas Bellinger struct se_device *se_dev = cmd->se_dev; 3787b745c84SNicholas Bellinger unsigned int block_size = se_dev->dev_attrib.block_size; 3797b745c84SNicholas Bellinger unsigned int i = 0, end; 3807b745c84SNicholas Bellinger unsigned char *buf, *p, *kmap_buf; 3817b745c84SNicholas Bellinger 3827b745c84SNicholas Bellinger buf = kzalloc(min_t(unsigned int, len, PAGE_SIZE), GFP_KERNEL); 3837b745c84SNicholas Bellinger if (!buf) { 3847b745c84SNicholas Bellinger pr_err("Unable to allocate fd_execute_write_same buf\n"); 3857b745c84SNicholas Bellinger return NULL; 3867b745c84SNicholas Bellinger } 3877b745c84SNicholas Bellinger 3887b745c84SNicholas Bellinger kmap_buf = kmap(sg_page(sg)) + sg->offset; 3897b745c84SNicholas Bellinger if (!kmap_buf) { 3907b745c84SNicholas Bellinger pr_err("kmap() failed in fd_setup_write_same\n"); 3917b745c84SNicholas Bellinger kfree(buf); 3927b745c84SNicholas Bellinger return NULL; 3937b745c84SNicholas Bellinger } 3947b745c84SNicholas Bellinger /* 3957b745c84SNicholas Bellinger * Fill local *buf to contain multiple WRITE_SAME blocks up to 3967b745c84SNicholas Bellinger * min(len, PAGE_SIZE) 3977b745c84SNicholas Bellinger */ 3987b745c84SNicholas Bellinger p = buf; 3997b745c84SNicholas Bellinger end = min_t(unsigned int, len, PAGE_SIZE); 4007b745c84SNicholas Bellinger 4017b745c84SNicholas Bellinger while (i < end) { 4027b745c84SNicholas Bellinger memcpy(p, kmap_buf, block_size); 4037b745c84SNicholas Bellinger 4047b745c84SNicholas Bellinger i += block_size; 4057b745c84SNicholas Bellinger p += block_size; 4067b745c84SNicholas Bellinger } 4077b745c84SNicholas Bellinger kunmap(sg_page(sg)); 4087b745c84SNicholas Bellinger 4097b745c84SNicholas Bellinger return buf; 4107b745c84SNicholas Bellinger } 4117b745c84SNicholas Bellinger 4127b745c84SNicholas Bellinger static sense_reason_t 4137b745c84SNicholas Bellinger fd_execute_write_same(struct se_cmd *cmd) 4147b745c84SNicholas Bellinger { 4157b745c84SNicholas Bellinger struct se_device *se_dev = cmd->se_dev; 4167b745c84SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(se_dev); 4177b745c84SNicholas Bellinger struct file *f = fd_dev->fd_file; 4187b745c84SNicholas Bellinger struct scatterlist *sg; 4197b745c84SNicholas Bellinger struct iovec *iov; 4207b745c84SNicholas Bellinger mm_segment_t old_fs; 421972b29c8SRoland Dreier sector_t nolb = sbc_get_write_same_sectors(cmd); 4227b745c84SNicholas Bellinger loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; 4237b745c84SNicholas Bellinger unsigned int len, len_tmp, iov_num; 4247b745c84SNicholas Bellinger int i, rc; 4257b745c84SNicholas Bellinger unsigned char *buf; 4267b745c84SNicholas Bellinger 4277b745c84SNicholas Bellinger if (!nolb) { 4287b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 4297b745c84SNicholas Bellinger return 0; 4307b745c84SNicholas Bellinger } 4317b745c84SNicholas Bellinger sg = &cmd->t_data_sg[0]; 4327b745c84SNicholas Bellinger 4337b745c84SNicholas Bellinger if (cmd->t_data_nents > 1 || 4347b745c84SNicholas Bellinger sg->length != cmd->se_dev->dev_attrib.block_size) { 4357b745c84SNicholas Bellinger pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" 4367b745c84SNicholas Bellinger " block_size: %u\n", cmd->t_data_nents, sg->length, 4377b745c84SNicholas Bellinger cmd->se_dev->dev_attrib.block_size); 4387b745c84SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 4397b745c84SNicholas Bellinger } 4407b745c84SNicholas Bellinger 4417b745c84SNicholas Bellinger len = len_tmp = nolb * se_dev->dev_attrib.block_size; 4427b745c84SNicholas Bellinger iov_num = DIV_ROUND_UP(len, PAGE_SIZE); 4437b745c84SNicholas Bellinger 4447b745c84SNicholas Bellinger buf = fd_setup_write_same_buf(cmd, sg, len); 4457b745c84SNicholas Bellinger if (!buf) 4467b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4477b745c84SNicholas Bellinger 4487b745c84SNicholas Bellinger iov = vzalloc(sizeof(struct iovec) * iov_num); 4497b745c84SNicholas Bellinger if (!iov) { 4507b745c84SNicholas Bellinger pr_err("Unable to allocate fd_execute_write_same iovecs\n"); 4517b745c84SNicholas Bellinger kfree(buf); 4527b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4537b745c84SNicholas Bellinger } 4547b745c84SNicholas Bellinger /* 4557b745c84SNicholas Bellinger * Map the single fabric received scatterlist block now populated 4567b745c84SNicholas Bellinger * in *buf into each iovec for I/O submission. 4577b745c84SNicholas Bellinger */ 4587b745c84SNicholas Bellinger for (i = 0; i < iov_num; i++) { 4597b745c84SNicholas Bellinger iov[i].iov_base = buf; 4607b745c84SNicholas Bellinger iov[i].iov_len = min_t(unsigned int, len_tmp, PAGE_SIZE); 4617b745c84SNicholas Bellinger len_tmp -= iov[i].iov_len; 4627b745c84SNicholas Bellinger } 4637b745c84SNicholas Bellinger 4647b745c84SNicholas Bellinger old_fs = get_fs(); 4657b745c84SNicholas Bellinger set_fs(get_ds()); 4667b745c84SNicholas Bellinger rc = vfs_writev(f, &iov[0], iov_num, &pos); 4677b745c84SNicholas Bellinger set_fs(old_fs); 4687b745c84SNicholas Bellinger 4697b745c84SNicholas Bellinger vfree(iov); 4707b745c84SNicholas Bellinger kfree(buf); 4717b745c84SNicholas Bellinger 4727b745c84SNicholas Bellinger if (rc < 0 || rc != len) { 4737b745c84SNicholas Bellinger pr_err("vfs_writev() returned %d for write same\n", rc); 4747b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4757b745c84SNicholas Bellinger } 4767b745c84SNicholas Bellinger 4777b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 4787b745c84SNicholas Bellinger return 0; 4797b745c84SNicholas Bellinger } 4807b745c84SNicholas Bellinger 481de103c93SChristoph Hellwig static sense_reason_t 48270d3ae5cSAsias He fd_execute_write_same_unmap(struct se_cmd *cmd) 48370d3ae5cSAsias He { 48470d3ae5cSAsias He struct se_device *se_dev = cmd->se_dev; 48570d3ae5cSAsias He struct fd_dev *fd_dev = FD_DEV(se_dev); 48670d3ae5cSAsias He struct file *file = fd_dev->fd_file; 48770d3ae5cSAsias He struct inode *inode = file->f_mapping->host; 48870d3ae5cSAsias He sector_t nolb = sbc_get_write_same_sectors(cmd); 48970d3ae5cSAsias He int ret; 49070d3ae5cSAsias He 49170d3ae5cSAsias He if (!nolb) { 49270d3ae5cSAsias He target_complete_cmd(cmd, SAM_STAT_GOOD); 49370d3ae5cSAsias He return 0; 49470d3ae5cSAsias He } 49570d3ae5cSAsias He 49670d3ae5cSAsias He if (S_ISBLK(inode->i_mode)) { 49770d3ae5cSAsias He /* The backend is block device, use discard */ 49870d3ae5cSAsias He struct block_device *bdev = inode->i_bdev; 49970d3ae5cSAsias He 50070d3ae5cSAsias He ret = blkdev_issue_discard(bdev, cmd->t_task_lba, 50170d3ae5cSAsias He nolb, GFP_KERNEL, 0); 50270d3ae5cSAsias He if (ret < 0) { 50370d3ae5cSAsias He pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", 50470d3ae5cSAsias He ret); 50570d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 50670d3ae5cSAsias He } 50770d3ae5cSAsias He } else { 50870d3ae5cSAsias He /* The backend is normal file, use fallocate */ 50970d3ae5cSAsias He loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; 51070d3ae5cSAsias He unsigned int len = nolb * se_dev->dev_attrib.block_size; 51170d3ae5cSAsias He int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 51270d3ae5cSAsias He 51370d3ae5cSAsias He if (!file->f_op->fallocate) 51470d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 51570d3ae5cSAsias He 51670d3ae5cSAsias He ret = file->f_op->fallocate(file, mode, pos, len); 51770d3ae5cSAsias He if (ret < 0) { 51870d3ae5cSAsias He pr_warn("FILEIO: fallocate() failed: %d\n", ret); 51970d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 52070d3ae5cSAsias He } 52170d3ae5cSAsias He } 52270d3ae5cSAsias He 52370d3ae5cSAsias He target_complete_cmd(cmd, GOOD); 52470d3ae5cSAsias He return 0; 52570d3ae5cSAsias He } 52670d3ae5cSAsias He 52770d3ae5cSAsias He static sense_reason_t 528de103c93SChristoph Hellwig fd_execute_rw(struct se_cmd *cmd) 529c66ac9dbSNicholas Bellinger { 5300c2ad7d1SChristoph Hellwig struct scatterlist *sgl = cmd->t_data_sg; 5310c2ad7d1SChristoph Hellwig u32 sgl_nents = cmd->t_data_nents; 5320c2ad7d1SChristoph Hellwig enum dma_data_direction data_direction = cmd->data_direction; 533c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 534c66ac9dbSNicholas Bellinger int ret = 0; 535c66ac9dbSNicholas Bellinger 536c66ac9dbSNicholas Bellinger /* 537c66ac9dbSNicholas Bellinger * Call vectorized fileio functions to map struct scatterlist 538c66ac9dbSNicholas Bellinger * physical memory addresses to struct iovec virtual memory. 539c66ac9dbSNicholas Bellinger */ 5405787cacdSChristoph Hellwig if (data_direction == DMA_FROM_DEVICE) { 541778229afSSebastian Andrzej Siewior ret = fd_do_rw(cmd, sgl, sgl_nents, 0); 542c66ac9dbSNicholas Bellinger } else { 543778229afSSebastian Andrzej Siewior ret = fd_do_rw(cmd, sgl, sgl_nents, 1); 544a4dff304SNicholas Bellinger /* 545a4dff304SNicholas Bellinger * Perform implict vfs_fsync_range() for fd_do_writev() ops 546a4dff304SNicholas Bellinger * for SCSI WRITEs with Forced Unit Access (FUA) set. 547a4dff304SNicholas Bellinger * Allow this to happen independent of WCE=0 setting. 548a4dff304SNicholas Bellinger */ 549c66ac9dbSNicholas Bellinger if (ret > 0 && 5500fd97ccfSChristoph Hellwig dev->dev_attrib.emulate_fua_write > 0 && 5512d3a4b51SChristoph Hellwig (cmd->se_cmd_flags & SCF_FUA)) { 5520fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 553a4dff304SNicholas Bellinger loff_t start = cmd->t_task_lba * 5540fd97ccfSChristoph Hellwig dev->dev_attrib.block_size; 555a4dff304SNicholas Bellinger loff_t end = start + cmd->data_length; 556c66ac9dbSNicholas Bellinger 557a4dff304SNicholas Bellinger vfs_fsync_range(fd_dev->fd_file, start, end, 1); 558a4dff304SNicholas Bellinger } 559c66ac9dbSNicholas Bellinger } 560c66ac9dbSNicholas Bellinger 561de103c93SChristoph Hellwig if (ret < 0) 562de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 563de103c93SChristoph Hellwig 5645787cacdSChristoph Hellwig if (ret) 5655787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 56603e98c9eSNicholas Bellinger return 0; 567c66ac9dbSNicholas Bellinger } 568c66ac9dbSNicholas Bellinger 569c66ac9dbSNicholas Bellinger enum { 570c66ac9dbSNicholas Bellinger Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err 571c66ac9dbSNicholas Bellinger }; 572c66ac9dbSNicholas Bellinger 573c66ac9dbSNicholas Bellinger static match_table_t tokens = { 574c66ac9dbSNicholas Bellinger {Opt_fd_dev_name, "fd_dev_name=%s"}, 575c66ac9dbSNicholas Bellinger {Opt_fd_dev_size, "fd_dev_size=%s"}, 576b32f4c7eSNicholas Bellinger {Opt_fd_buffered_io, "fd_buffered_io=%d"}, 577c66ac9dbSNicholas Bellinger {Opt_err, NULL} 578c66ac9dbSNicholas Bellinger }; 579c66ac9dbSNicholas Bellinger 5800fd97ccfSChristoph Hellwig static ssize_t fd_set_configfs_dev_params(struct se_device *dev, 581c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 582c66ac9dbSNicholas Bellinger { 5830fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 584c66ac9dbSNicholas Bellinger char *orig, *ptr, *arg_p, *opts; 585c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 586b32f4c7eSNicholas Bellinger int ret = 0, arg, token; 587c66ac9dbSNicholas Bellinger 588c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 589c66ac9dbSNicholas Bellinger if (!opts) 590c66ac9dbSNicholas Bellinger return -ENOMEM; 591c66ac9dbSNicholas Bellinger 592c66ac9dbSNicholas Bellinger orig = opts; 593c66ac9dbSNicholas Bellinger 59490c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 595c66ac9dbSNicholas Bellinger if (!*ptr) 596c66ac9dbSNicholas Bellinger continue; 597c66ac9dbSNicholas Bellinger 598c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 599c66ac9dbSNicholas Bellinger switch (token) { 600c66ac9dbSNicholas Bellinger case Opt_fd_dev_name: 601dbc6e022SAl Viro if (match_strlcpy(fd_dev->fd_dev_name, &args[0], 602dbc6e022SAl Viro FD_MAX_DEV_NAME) == 0) { 603dbc6e022SAl Viro ret = -EINVAL; 6046d180253SJesper Juhl break; 6056d180253SJesper Juhl } 6066708bb27SAndy Grover pr_debug("FILEIO: Referencing Path: %s\n", 607c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name); 608c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_PATH; 609c66ac9dbSNicholas Bellinger break; 610c66ac9dbSNicholas Bellinger case Opt_fd_dev_size: 611c66ac9dbSNicholas Bellinger arg_p = match_strdup(&args[0]); 6126d180253SJesper Juhl if (!arg_p) { 6136d180253SJesper Juhl ret = -ENOMEM; 6146d180253SJesper Juhl break; 6156d180253SJesper Juhl } 616c66ac9dbSNicholas Bellinger ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size); 6176d180253SJesper Juhl kfree(arg_p); 618c66ac9dbSNicholas Bellinger if (ret < 0) { 6196708bb27SAndy Grover pr_err("strict_strtoull() failed for" 620c66ac9dbSNicholas Bellinger " fd_dev_size=\n"); 621c66ac9dbSNicholas Bellinger goto out; 622c66ac9dbSNicholas Bellinger } 6236708bb27SAndy Grover pr_debug("FILEIO: Referencing Size: %llu" 624c66ac9dbSNicholas Bellinger " bytes\n", fd_dev->fd_dev_size); 625c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_SIZE; 626c66ac9dbSNicholas Bellinger break; 627b32f4c7eSNicholas Bellinger case Opt_fd_buffered_io: 628b32f4c7eSNicholas Bellinger match_int(args, &arg); 629b32f4c7eSNicholas Bellinger if (arg != 1) { 630b32f4c7eSNicholas Bellinger pr_err("bogus fd_buffered_io=%d value\n", arg); 631b32f4c7eSNicholas Bellinger ret = -EINVAL; 632b32f4c7eSNicholas Bellinger goto out; 633b32f4c7eSNicholas Bellinger } 634b32f4c7eSNicholas Bellinger 635b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Using buffered I/O" 636b32f4c7eSNicholas Bellinger " operations for struct fd_dev\n"); 637b32f4c7eSNicholas Bellinger 638b32f4c7eSNicholas Bellinger fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; 639b32f4c7eSNicholas Bellinger break; 640c66ac9dbSNicholas Bellinger default: 641c66ac9dbSNicholas Bellinger break; 642c66ac9dbSNicholas Bellinger } 643c66ac9dbSNicholas Bellinger } 644c66ac9dbSNicholas Bellinger 645c66ac9dbSNicholas Bellinger out: 646c66ac9dbSNicholas Bellinger kfree(orig); 647c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 648c66ac9dbSNicholas Bellinger } 649c66ac9dbSNicholas Bellinger 6500fd97ccfSChristoph Hellwig static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) 651c66ac9dbSNicholas Bellinger { 6520fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 653c66ac9dbSNicholas Bellinger ssize_t bl = 0; 654c66ac9dbSNicholas Bellinger 655c66ac9dbSNicholas Bellinger bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); 656b32f4c7eSNicholas Bellinger bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", 657b32f4c7eSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size, 658b32f4c7eSNicholas Bellinger (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? 659b32f4c7eSNicholas Bellinger "Buffered-WCE" : "O_DSYNC"); 660c66ac9dbSNicholas Bellinger return bl; 661c66ac9dbSNicholas Bellinger } 662c66ac9dbSNicholas Bellinger 663c66ac9dbSNicholas Bellinger static sector_t fd_get_blocks(struct se_device *dev) 664c66ac9dbSNicholas Bellinger { 6650fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 666cd9323fdSNicholas Bellinger struct file *f = fd_dev->fd_file; 667cd9323fdSNicholas Bellinger struct inode *i = f->f_mapping->host; 668cd9323fdSNicholas Bellinger unsigned long long dev_size; 669cd9323fdSNicholas Bellinger /* 670cd9323fdSNicholas Bellinger * When using a file that references an underlying struct block_device, 671cd9323fdSNicholas Bellinger * ensure dev_size is always based on the current inode size in order 672cd9323fdSNicholas Bellinger * to handle underlying block_device resize operations. 673cd9323fdSNicholas Bellinger */ 674cd9323fdSNicholas Bellinger if (S_ISBLK(i->i_mode)) 675cd9323fdSNicholas Bellinger dev_size = (i_size_read(i) - fd_dev->fd_block_size); 676cd9323fdSNicholas Bellinger else 677cd9323fdSNicholas Bellinger dev_size = fd_dev->fd_dev_size; 678c66ac9dbSNicholas Bellinger 6790fd97ccfSChristoph Hellwig return div_u64(dev_size, dev->dev_attrib.block_size); 680c66ac9dbSNicholas Bellinger } 681c66ac9dbSNicholas Bellinger 6829e999a6cSChristoph Hellwig static struct sbc_ops fd_sbc_ops = { 6830c2ad7d1SChristoph Hellwig .execute_rw = fd_execute_rw, 684ad67f0d9SChristoph Hellwig .execute_sync_cache = fd_execute_sync_cache, 6857b745c84SNicholas Bellinger .execute_write_same = fd_execute_write_same, 68670d3ae5cSAsias He .execute_write_same_unmap = fd_execute_write_same_unmap, 6870c2ad7d1SChristoph Hellwig }; 6880c2ad7d1SChristoph Hellwig 689de103c93SChristoph Hellwig static sense_reason_t 690de103c93SChristoph Hellwig fd_parse_cdb(struct se_cmd *cmd) 6910c2ad7d1SChristoph Hellwig { 6929e999a6cSChristoph Hellwig return sbc_parse_cdb(cmd, &fd_sbc_ops); 6930c2ad7d1SChristoph Hellwig } 6940c2ad7d1SChristoph Hellwig 695c66ac9dbSNicholas Bellinger static struct se_subsystem_api fileio_template = { 696c66ac9dbSNicholas Bellinger .name = "fileio", 6970fd97ccfSChristoph Hellwig .inquiry_prod = "FILEIO", 6980fd97ccfSChristoph Hellwig .inquiry_rev = FD_VERSION, 699c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 700c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, 701c66ac9dbSNicholas Bellinger .attach_hba = fd_attach_hba, 702c66ac9dbSNicholas Bellinger .detach_hba = fd_detach_hba, 7030fd97ccfSChristoph Hellwig .alloc_device = fd_alloc_device, 7040fd97ccfSChristoph Hellwig .configure_device = fd_configure_device, 705c66ac9dbSNicholas Bellinger .free_device = fd_free_device, 7060c2ad7d1SChristoph Hellwig .parse_cdb = fd_parse_cdb, 707c66ac9dbSNicholas Bellinger .set_configfs_dev_params = fd_set_configfs_dev_params, 708c66ac9dbSNicholas Bellinger .show_configfs_dev_params = fd_show_configfs_dev_params, 7096f23ac8aSChristoph Hellwig .get_device_type = sbc_get_device_type, 710c66ac9dbSNicholas Bellinger .get_blocks = fd_get_blocks, 711c66ac9dbSNicholas Bellinger }; 712c66ac9dbSNicholas Bellinger 713c66ac9dbSNicholas Bellinger static int __init fileio_module_init(void) 714c66ac9dbSNicholas Bellinger { 715c66ac9dbSNicholas Bellinger return transport_subsystem_register(&fileio_template); 716c66ac9dbSNicholas Bellinger } 717c66ac9dbSNicholas Bellinger 71863b91d5aSAsias He static void __exit fileio_module_exit(void) 719c66ac9dbSNicholas Bellinger { 720c66ac9dbSNicholas Bellinger transport_subsystem_release(&fileio_template); 721c66ac9dbSNicholas Bellinger } 722c66ac9dbSNicholas Bellinger 723c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); 724c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 725c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 726c66ac9dbSNicholas Bellinger 727c66ac9dbSNicholas Bellinger module_init(fileio_module_init); 728c66ac9dbSNicholas Bellinger module_exit(fileio_module_exit); 729