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 * 64c76251eSNicholas Bellinger * (c) Copyright 2005-2013 Datera, Inc. 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> 3650642762SAsias He #include <asm/unaligned.h> 37c66ac9dbSNicholas Bellinger 38c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 39c4795fb2SChristoph Hellwig #include <target/target_core_backend.h> 40b2320497SNicholas Bellinger #include <target/target_core_backend_configfs.h> 41c66ac9dbSNicholas Bellinger 42c66ac9dbSNicholas Bellinger #include "target_core_file.h" 43c66ac9dbSNicholas Bellinger 440fd97ccfSChristoph Hellwig static inline struct fd_dev *FD_DEV(struct se_device *dev) 450fd97ccfSChristoph Hellwig { 460fd97ccfSChristoph Hellwig return container_of(dev, struct fd_dev, dev); 470fd97ccfSChristoph Hellwig } 48c66ac9dbSNicholas Bellinger 49c66ac9dbSNicholas Bellinger /* fd_attach_hba(): (Part of se_subsystem_api_t template) 50c66ac9dbSNicholas Bellinger * 51c66ac9dbSNicholas Bellinger * 52c66ac9dbSNicholas Bellinger */ 53c66ac9dbSNicholas Bellinger static int fd_attach_hba(struct se_hba *hba, u32 host_id) 54c66ac9dbSNicholas Bellinger { 55c66ac9dbSNicholas Bellinger struct fd_host *fd_host; 56c66ac9dbSNicholas Bellinger 57c66ac9dbSNicholas Bellinger fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); 586708bb27SAndy Grover if (!fd_host) { 596708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_host\n"); 60e3d6f909SAndy Grover return -ENOMEM; 61c66ac9dbSNicholas Bellinger } 62c66ac9dbSNicholas Bellinger 63c66ac9dbSNicholas Bellinger fd_host->fd_host_id = host_id; 64c66ac9dbSNicholas Bellinger 65e3d6f909SAndy Grover hba->hba_ptr = fd_host; 66c66ac9dbSNicholas Bellinger 676708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" 68c66ac9dbSNicholas Bellinger " Target Core Stack %s\n", hba->hba_id, FD_VERSION, 69c66ac9dbSNicholas Bellinger TARGET_CORE_MOD_VERSION); 7095cadaceSNicholas Bellinger pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", 7195cadaceSNicholas Bellinger hba->hba_id, fd_host->fd_host_id); 72c66ac9dbSNicholas Bellinger 73c66ac9dbSNicholas Bellinger return 0; 74c66ac9dbSNicholas Bellinger } 75c66ac9dbSNicholas Bellinger 76c66ac9dbSNicholas Bellinger static void fd_detach_hba(struct se_hba *hba) 77c66ac9dbSNicholas Bellinger { 78c66ac9dbSNicholas Bellinger struct fd_host *fd_host = hba->hba_ptr; 79c66ac9dbSNicholas Bellinger 806708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" 81c66ac9dbSNicholas Bellinger " Target Core\n", hba->hba_id, fd_host->fd_host_id); 82c66ac9dbSNicholas Bellinger 83c66ac9dbSNicholas Bellinger kfree(fd_host); 84c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 85c66ac9dbSNicholas Bellinger } 86c66ac9dbSNicholas Bellinger 870fd97ccfSChristoph Hellwig static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) 88c66ac9dbSNicholas Bellinger { 89c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev; 908359cf43SJörn Engel struct fd_host *fd_host = hba->hba_ptr; 91c66ac9dbSNicholas Bellinger 92c66ac9dbSNicholas Bellinger fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); 936708bb27SAndy Grover if (!fd_dev) { 946708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_dev\n"); 95c66ac9dbSNicholas Bellinger return NULL; 96c66ac9dbSNicholas Bellinger } 97c66ac9dbSNicholas Bellinger 98c66ac9dbSNicholas Bellinger fd_dev->fd_host = fd_host; 99c66ac9dbSNicholas Bellinger 1006708bb27SAndy Grover pr_debug("FILEIO: Allocated fd_dev for %p\n", name); 101c66ac9dbSNicholas Bellinger 1020fd97ccfSChristoph Hellwig return &fd_dev->dev; 103c66ac9dbSNicholas Bellinger } 104c66ac9dbSNicholas Bellinger 1050fd97ccfSChristoph Hellwig static int fd_configure_device(struct se_device *dev) 106c66ac9dbSNicholas Bellinger { 1070fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 1080fd97ccfSChristoph Hellwig struct fd_host *fd_host = dev->se_hba->hba_ptr; 109c66ac9dbSNicholas Bellinger struct file *file; 110c66ac9dbSNicholas Bellinger struct inode *inode = NULL; 1110fd97ccfSChristoph Hellwig int flags, ret = -EINVAL; 112c66ac9dbSNicholas Bellinger 1130fd97ccfSChristoph Hellwig if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { 1140fd97ccfSChristoph Hellwig pr_err("Missing fd_dev_name=\n"); 1150fd97ccfSChristoph Hellwig return -EINVAL; 1160fd97ccfSChristoph Hellwig } 117c66ac9dbSNicholas Bellinger 118c66ac9dbSNicholas Bellinger /* 119a4dff304SNicholas Bellinger * Use O_DSYNC by default instead of O_SYNC to forgo syncing 120a4dff304SNicholas Bellinger * of pure timestamp updates. 121c66ac9dbSNicholas Bellinger */ 122a4dff304SNicholas Bellinger flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; 1230fd97ccfSChristoph Hellwig 124b32f4c7eSNicholas Bellinger /* 125b32f4c7eSNicholas Bellinger * Optionally allow fd_buffered_io=1 to be enabled for people 126b32f4c7eSNicholas Bellinger * who want use the fs buffer cache as an WriteCache mechanism. 127b32f4c7eSNicholas Bellinger * 128b32f4c7eSNicholas Bellinger * This means that in event of a hard failure, there is a risk 129b32f4c7eSNicholas Bellinger * of silent data-loss if the SCSI client has *not* performed a 130b32f4c7eSNicholas Bellinger * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE 131b32f4c7eSNicholas Bellinger * to write-out the entire device cache. 132b32f4c7eSNicholas Bellinger */ 133b32f4c7eSNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { 134b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); 135b32f4c7eSNicholas Bellinger flags &= ~O_DSYNC; 136b32f4c7eSNicholas Bellinger } 137c66ac9dbSNicholas Bellinger 138dbc6e022SAl Viro file = filp_open(fd_dev->fd_dev_name, flags, 0600); 139613640e4SNicholas Bellinger if (IS_ERR(file)) { 140dbc6e022SAl Viro pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); 141613640e4SNicholas Bellinger ret = PTR_ERR(file); 142613640e4SNicholas Bellinger goto fail; 143613640e4SNicholas Bellinger } 144c66ac9dbSNicholas Bellinger fd_dev->fd_file = file; 145c66ac9dbSNicholas Bellinger /* 146c66ac9dbSNicholas Bellinger * If using a block backend with this struct file, we extract 147c66ac9dbSNicholas Bellinger * fd_dev->fd_[block,dev]_size from struct block_device. 148c66ac9dbSNicholas Bellinger * 149c66ac9dbSNicholas Bellinger * Otherwise, we use the passed fd_size= from configfs 150c66ac9dbSNicholas Bellinger */ 151c66ac9dbSNicholas Bellinger inode = file->f_mapping->host; 152c66ac9dbSNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 1530fd97ccfSChristoph Hellwig struct request_queue *q = bdev_get_queue(inode->i_bdev); 154cd9323fdSNicholas Bellinger unsigned long long dev_size; 1550fd97ccfSChristoph Hellwig 15621363ca8SNicholas Bellinger fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); 157c66ac9dbSNicholas Bellinger /* 158c66ac9dbSNicholas Bellinger * Determine the number of bytes from i_size_read() minus 159c66ac9dbSNicholas Bellinger * one (1) logical sector from underlying struct block_device 160c66ac9dbSNicholas Bellinger */ 161cd9323fdSNicholas Bellinger dev_size = (i_size_read(file->f_mapping->host) - 162c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 163c66ac9dbSNicholas Bellinger 1646708bb27SAndy Grover pr_debug("FILEIO: Using size: %llu bytes from struct" 165c66ac9dbSNicholas Bellinger " block_device blocks: %llu logical_block_size: %d\n", 166cd9323fdSNicholas Bellinger dev_size, div_u64(dev_size, fd_dev->fd_block_size), 167c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 16870d3ae5cSAsias He /* 16970d3ae5cSAsias He * Check if the underlying struct block_device request_queue supports 17070d3ae5cSAsias He * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM 17170d3ae5cSAsias He * in ATA and we need to set TPE=1 17270d3ae5cSAsias He */ 17370d3ae5cSAsias He if (blk_queue_discard(q)) { 17470d3ae5cSAsias He dev->dev_attrib.max_unmap_lba_count = 17570d3ae5cSAsias He q->limits.max_discard_sectors; 17670d3ae5cSAsias He /* 17770d3ae5cSAsias He * Currently hardcoded to 1 in Linux/SCSI code.. 17870d3ae5cSAsias He */ 17970d3ae5cSAsias He dev->dev_attrib.max_unmap_block_desc_count = 1; 18070d3ae5cSAsias He dev->dev_attrib.unmap_granularity = 18170d3ae5cSAsias He q->limits.discard_granularity >> 9; 18270d3ae5cSAsias He dev->dev_attrib.unmap_granularity_alignment = 18370d3ae5cSAsias He q->limits.discard_alignment; 18470d3ae5cSAsias He pr_debug("IFILE: BLOCK Discard support available," 18570d3ae5cSAsias He " disabled by default\n"); 18670d3ae5cSAsias He } 18770d3ae5cSAsias He /* 18870d3ae5cSAsias He * Enable write same emulation for IBLOCK and use 0xFFFF as 18970d3ae5cSAsias He * the smaller WRITE_SAME(10) only has a two-byte block count. 19070d3ae5cSAsias He */ 19170d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0xFFFF; 1920463a3feSAsias He 1930463a3feSAsias He if (blk_queue_nonrot(q)) 1940463a3feSAsias He dev->dev_attrib.is_nonrot = 1; 195c66ac9dbSNicholas Bellinger } else { 196c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { 1976708bb27SAndy Grover pr_err("FILEIO: Missing fd_dev_size=" 198c66ac9dbSNicholas Bellinger " parameter, and no backing struct" 199c66ac9dbSNicholas Bellinger " block_device\n"); 200c66ac9dbSNicholas Bellinger goto fail; 201c66ac9dbSNicholas Bellinger } 202c66ac9dbSNicholas Bellinger 20321363ca8SNicholas Bellinger fd_dev->fd_block_size = FD_BLOCKSIZE; 20470d3ae5cSAsias He /* 20570d3ae5cSAsias He * Limit UNMAP emulation to 8k Number of LBAs (NoLB) 20670d3ae5cSAsias He */ 20770d3ae5cSAsias He dev->dev_attrib.max_unmap_lba_count = 0x2000; 20870d3ae5cSAsias He /* 20970d3ae5cSAsias He * Currently hardcoded to 1 in Linux/SCSI code.. 21070d3ae5cSAsias He */ 21170d3ae5cSAsias He dev->dev_attrib.max_unmap_block_desc_count = 1; 21270d3ae5cSAsias He dev->dev_attrib.unmap_granularity = 1; 21370d3ae5cSAsias He dev->dev_attrib.unmap_granularity_alignment = 0; 21470d3ae5cSAsias He 21570d3ae5cSAsias He /* 21670d3ae5cSAsias He * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) 21770d3ae5cSAsias He * based upon struct iovec limit for vfs_writev() 21870d3ae5cSAsias He */ 21970d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0x1000; 220c66ac9dbSNicholas Bellinger } 221c66ac9dbSNicholas Bellinger 22221363ca8SNicholas Bellinger dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; 22395cadaceSNicholas Bellinger dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; 22495cadaceSNicholas Bellinger dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; 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 2618287fa5fSSagi Grimberg static int fd_do_rw(struct se_cmd *cmd, struct file *fd, 2628287fa5fSSagi Grimberg u32 block_size, struct scatterlist *sgl, 2638287fa5fSSagi Grimberg u32 sgl_nents, u32 data_length, int is_write) 26442201b55SNicholas Bellinger { 2655787cacdSChristoph Hellwig struct scatterlist *sg; 2666b9a44d0SChristoph Hellwig struct iov_iter iter; 2676b9a44d0SChristoph Hellwig struct bio_vec *bvec; 2686b9a44d0SChristoph Hellwig ssize_t len = 0; 2698287fa5fSSagi Grimberg loff_t pos = (cmd->t_task_lba * block_size); 270c66ac9dbSNicholas Bellinger int ret = 0, i; 271c66ac9dbSNicholas Bellinger 2726b9a44d0SChristoph Hellwig bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); 2736b9a44d0SChristoph Hellwig if (!bvec) { 2746708bb27SAndy Grover pr_err("Unable to allocate fd_do_readv iov[]\n"); 275e3d6f909SAndy Grover return -ENOMEM; 276c66ac9dbSNicholas Bellinger } 277c66ac9dbSNicholas Bellinger 2785787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 2796b9a44d0SChristoph Hellwig bvec[i].bv_page = sg_page(sg); 2806b9a44d0SChristoph Hellwig bvec[i].bv_len = sg->length; 2816b9a44d0SChristoph Hellwig bvec[i].bv_offset = sg->offset; 2826b9a44d0SChristoph Hellwig 2836b9a44d0SChristoph Hellwig len += sg->length; 284c66ac9dbSNicholas Bellinger } 285c66ac9dbSNicholas Bellinger 2866b9a44d0SChristoph Hellwig iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); 287778229afSSebastian Andrzej Siewior if (is_write) 2886b9a44d0SChristoph Hellwig ret = vfs_iter_write(fd, &iter, &pos); 289778229afSSebastian Andrzej Siewior else 2906b9a44d0SChristoph Hellwig ret = vfs_iter_read(fd, &iter, &pos); 291778229afSSebastian Andrzej Siewior 2926b9a44d0SChristoph Hellwig kfree(bvec); 293778229afSSebastian Andrzej Siewior 294778229afSSebastian Andrzej Siewior if (is_write) { 2958287fa5fSSagi Grimberg if (ret < 0 || ret != data_length) { 296778229afSSebastian Andrzej Siewior pr_err("%s() write returned %d\n", __func__, ret); 297778229afSSebastian Andrzej Siewior return (ret < 0 ? ret : -EINVAL); 298778229afSSebastian Andrzej Siewior } 299778229afSSebastian Andrzej Siewior } else { 300c66ac9dbSNicholas Bellinger /* 301c66ac9dbSNicholas Bellinger * Return zeros and GOOD status even if the READ did not return 302c66ac9dbSNicholas Bellinger * the expected virt_size for struct file w/o a backing struct 303c66ac9dbSNicholas Bellinger * block_device. 304c66ac9dbSNicholas Bellinger */ 305496ad9aaSAl Viro if (S_ISBLK(file_inode(fd)->i_mode)) { 3068287fa5fSSagi Grimberg if (ret < 0 || ret != data_length) { 307778229afSSebastian Andrzej Siewior pr_err("%s() returned %d, expecting %u for " 308778229afSSebastian Andrzej Siewior "S_ISBLK\n", __func__, ret, 3098287fa5fSSagi Grimberg data_length); 310e3d6f909SAndy Grover return (ret < 0 ? ret : -EINVAL); 311c66ac9dbSNicholas Bellinger } 312c66ac9dbSNicholas Bellinger } else { 313c66ac9dbSNicholas Bellinger if (ret < 0) { 314778229afSSebastian Andrzej Siewior pr_err("%s() returned %d for non S_ISBLK\n", 315778229afSSebastian Andrzej Siewior __func__, ret); 316e3d6f909SAndy Grover return ret; 317c66ac9dbSNicholas Bellinger } 318c66ac9dbSNicholas Bellinger } 319c66ac9dbSNicholas Bellinger } 320c66ac9dbSNicholas Bellinger return 1; 321c66ac9dbSNicholas Bellinger } 322c66ac9dbSNicholas Bellinger 323de103c93SChristoph Hellwig static sense_reason_t 324de103c93SChristoph Hellwig fd_execute_sync_cache(struct se_cmd *cmd) 325c66ac9dbSNicholas Bellinger { 326c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 3270fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 328a1d8b49aSAndy Grover int immed = (cmd->t_task_cdb[1] & 0x2); 329c66ac9dbSNicholas Bellinger loff_t start, end; 330c66ac9dbSNicholas Bellinger int ret; 331c66ac9dbSNicholas Bellinger 332c66ac9dbSNicholas Bellinger /* 333c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 334c66ac9dbSNicholas Bellinger * for this SYNCHRONIZE_CACHE op 335c66ac9dbSNicholas Bellinger */ 336c66ac9dbSNicholas Bellinger if (immed) 3375787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 338c66ac9dbSNicholas Bellinger 339c66ac9dbSNicholas Bellinger /* 340c66ac9dbSNicholas Bellinger * Determine if we will be flushing the entire device. 341c66ac9dbSNicholas Bellinger */ 342a1d8b49aSAndy Grover if (cmd->t_task_lba == 0 && cmd->data_length == 0) { 343c66ac9dbSNicholas Bellinger start = 0; 344c66ac9dbSNicholas Bellinger end = LLONG_MAX; 345c66ac9dbSNicholas Bellinger } else { 3460fd97ccfSChristoph Hellwig start = cmd->t_task_lba * dev->dev_attrib.block_size; 347c66ac9dbSNicholas Bellinger if (cmd->data_length) 34862d3ab49SZach Brown end = start + cmd->data_length - 1; 349c66ac9dbSNicholas Bellinger else 350c66ac9dbSNicholas Bellinger end = LLONG_MAX; 351c66ac9dbSNicholas Bellinger } 352c66ac9dbSNicholas Bellinger 353c66ac9dbSNicholas Bellinger ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); 354c66ac9dbSNicholas Bellinger if (ret != 0) 3556708bb27SAndy Grover pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); 356c66ac9dbSNicholas Bellinger 3575787cacdSChristoph Hellwig if (immed) 358ad67f0d9SChristoph Hellwig return 0; 3595787cacdSChristoph Hellwig 360de103c93SChristoph Hellwig if (ret) 3615787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 362de103c93SChristoph Hellwig else 3635787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 364ad67f0d9SChristoph Hellwig 365ad67f0d9SChristoph Hellwig return 0; 366c66ac9dbSNicholas Bellinger } 367c66ac9dbSNicholas Bellinger 3687b745c84SNicholas Bellinger static sense_reason_t 3697b745c84SNicholas Bellinger fd_execute_write_same(struct se_cmd *cmd) 3707b745c84SNicholas Bellinger { 3717b745c84SNicholas Bellinger struct se_device *se_dev = cmd->se_dev; 3727b745c84SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(se_dev); 3737b745c84SNicholas Bellinger loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; 374d4c5dcacSChristoph Hellwig sector_t nolb = sbc_get_write_same_sectors(cmd); 375d4c5dcacSChristoph Hellwig struct iov_iter iter; 376d4c5dcacSChristoph Hellwig struct bio_vec *bvec; 377d4c5dcacSChristoph Hellwig unsigned int len = 0, i; 378d4c5dcacSChristoph Hellwig ssize_t ret; 3797b745c84SNicholas Bellinger 3807b745c84SNicholas Bellinger if (!nolb) { 3817b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 3827b745c84SNicholas Bellinger return 0; 3837b745c84SNicholas Bellinger } 384afd73f1bSNicholas Bellinger if (cmd->prot_op) { 385afd73f1bSNicholas Bellinger pr_err("WRITE_SAME: Protection information with FILEIO" 386afd73f1bSNicholas Bellinger " backends not supported\n"); 387afd73f1bSNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 388afd73f1bSNicholas Bellinger } 3897b745c84SNicholas Bellinger 3907b745c84SNicholas Bellinger if (cmd->t_data_nents > 1 || 391d4c5dcacSChristoph Hellwig cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { 3927b745c84SNicholas Bellinger pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" 393d4c5dcacSChristoph Hellwig " block_size: %u\n", 394d4c5dcacSChristoph Hellwig cmd->t_data_nents, 395d4c5dcacSChristoph Hellwig cmd->t_data_sg[0].length, 3967b745c84SNicholas Bellinger cmd->se_dev->dev_attrib.block_size); 3977b745c84SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 3987b745c84SNicholas Bellinger } 3997b745c84SNicholas Bellinger 400d4c5dcacSChristoph Hellwig bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); 401d4c5dcacSChristoph Hellwig if (!bvec) 4027b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4037b745c84SNicholas Bellinger 404d4c5dcacSChristoph Hellwig for (i = 0; i < nolb; i++) { 405d4c5dcacSChristoph Hellwig bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); 406d4c5dcacSChristoph Hellwig bvec[i].bv_len = cmd->t_data_sg[0].length; 407d4c5dcacSChristoph Hellwig bvec[i].bv_offset = cmd->t_data_sg[0].offset; 408d4c5dcacSChristoph Hellwig 409d4c5dcacSChristoph Hellwig len += se_dev->dev_attrib.block_size; 4107b745c84SNicholas Bellinger } 4117b745c84SNicholas Bellinger 412d4c5dcacSChristoph Hellwig iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); 413d4c5dcacSChristoph Hellwig ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); 4147b745c84SNicholas Bellinger 415d4c5dcacSChristoph Hellwig kfree(bvec); 416d4c5dcacSChristoph Hellwig if (ret < 0 || ret != len) { 417d4c5dcacSChristoph Hellwig pr_err("vfs_iter_write() returned %zd for write same\n", ret); 4187b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4197b745c84SNicholas Bellinger } 4207b745c84SNicholas Bellinger 4217b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 4227b745c84SNicholas Bellinger return 0; 4237b745c84SNicholas Bellinger } 4247b745c84SNicholas Bellinger 42564d240b7SAkinobu Mita static int 42664d240b7SAkinobu Mita fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, 42764d240b7SAkinobu Mita void *buf, size_t bufsize) 42864d240b7SAkinobu Mita { 42964d240b7SAkinobu Mita struct fd_dev *fd_dev = FD_DEV(se_dev); 43064d240b7SAkinobu Mita struct file *prot_fd = fd_dev->fd_prot_file; 43164d240b7SAkinobu Mita sector_t prot_length, prot; 43264d240b7SAkinobu Mita loff_t pos = lba * se_dev->prot_length; 43364d240b7SAkinobu Mita 43464d240b7SAkinobu Mita if (!prot_fd) { 43564d240b7SAkinobu Mita pr_err("Unable to locate fd_dev->fd_prot_file\n"); 43664d240b7SAkinobu Mita return -ENODEV; 43764d240b7SAkinobu Mita } 43864d240b7SAkinobu Mita 43964d240b7SAkinobu Mita prot_length = nolb * se_dev->prot_length; 44064d240b7SAkinobu Mita 44164d240b7SAkinobu Mita for (prot = 0; prot < prot_length;) { 44264d240b7SAkinobu Mita sector_t len = min_t(sector_t, bufsize, prot_length - prot); 44364d240b7SAkinobu Mita ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot); 44464d240b7SAkinobu Mita 44564d240b7SAkinobu Mita if (ret != len) { 44664d240b7SAkinobu Mita pr_err("vfs_write to prot file failed: %zd\n", ret); 44764d240b7SAkinobu Mita return ret < 0 ? ret : -ENODEV; 44864d240b7SAkinobu Mita } 44964d240b7SAkinobu Mita prot += ret; 45064d240b7SAkinobu Mita } 45164d240b7SAkinobu Mita 45264d240b7SAkinobu Mita return 0; 45364d240b7SAkinobu Mita } 45464d240b7SAkinobu Mita 45564d240b7SAkinobu Mita static int 45664d240b7SAkinobu Mita fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) 45764d240b7SAkinobu Mita { 45864d240b7SAkinobu Mita void *buf; 45964d240b7SAkinobu Mita int rc; 46064d240b7SAkinobu Mita 46164d240b7SAkinobu Mita buf = (void *)__get_free_page(GFP_KERNEL); 46264d240b7SAkinobu Mita if (!buf) { 46364d240b7SAkinobu Mita pr_err("Unable to allocate FILEIO prot buf\n"); 46464d240b7SAkinobu Mita return -ENOMEM; 46564d240b7SAkinobu Mita } 46664d240b7SAkinobu Mita memset(buf, 0xff, PAGE_SIZE); 46764d240b7SAkinobu Mita 46864d240b7SAkinobu Mita rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); 46964d240b7SAkinobu Mita 47064d240b7SAkinobu Mita free_page((unsigned long)buf); 47164d240b7SAkinobu Mita 47264d240b7SAkinobu Mita return rc; 47364d240b7SAkinobu Mita } 47464d240b7SAkinobu Mita 475de103c93SChristoph Hellwig static sense_reason_t 47686d71829SAsias He fd_do_unmap(struct se_cmd *cmd, void *priv, sector_t lba, sector_t nolb) 47770d3ae5cSAsias He { 47886d71829SAsias He struct file *file = priv; 47970d3ae5cSAsias He struct inode *inode = file->f_mapping->host; 48070d3ae5cSAsias He int ret; 48170d3ae5cSAsias He 48264d240b7SAkinobu Mita if (cmd->se_dev->dev_attrib.pi_prot_type) { 48364d240b7SAkinobu Mita ret = fd_do_prot_unmap(cmd, lba, nolb); 48464d240b7SAkinobu Mita if (ret) 48564d240b7SAkinobu Mita return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 48664d240b7SAkinobu Mita } 48764d240b7SAkinobu Mita 48870d3ae5cSAsias He if (S_ISBLK(inode->i_mode)) { 48970d3ae5cSAsias He /* The backend is block device, use discard */ 49070d3ae5cSAsias He struct block_device *bdev = inode->i_bdev; 49170d3ae5cSAsias He 49243f55bbbSAsias He ret = blkdev_issue_discard(bdev, lba, 49370d3ae5cSAsias He nolb, GFP_KERNEL, 0); 49470d3ae5cSAsias He if (ret < 0) { 49570d3ae5cSAsias He pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", 49670d3ae5cSAsias He ret); 49770d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 49870d3ae5cSAsias He } 49970d3ae5cSAsias He } else { 50070d3ae5cSAsias He /* The backend is normal file, use fallocate */ 50143f55bbbSAsias He struct se_device *se_dev = cmd->se_dev; 50243f55bbbSAsias He loff_t pos = lba * se_dev->dev_attrib.block_size; 50370d3ae5cSAsias He unsigned int len = nolb * se_dev->dev_attrib.block_size; 50470d3ae5cSAsias He int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 50570d3ae5cSAsias He 50670d3ae5cSAsias He if (!file->f_op->fallocate) 50770d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 50870d3ae5cSAsias He 50970d3ae5cSAsias He ret = file->f_op->fallocate(file, mode, pos, len); 51070d3ae5cSAsias He if (ret < 0) { 51170d3ae5cSAsias He pr_warn("FILEIO: fallocate() failed: %d\n", ret); 51270d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 51370d3ae5cSAsias He } 51470d3ae5cSAsias He } 51570d3ae5cSAsias He 51643f55bbbSAsias He return 0; 51743f55bbbSAsias He } 51843f55bbbSAsias He 51943f55bbbSAsias He static sense_reason_t 52043f55bbbSAsias He fd_execute_write_same_unmap(struct se_cmd *cmd) 52143f55bbbSAsias He { 52243f55bbbSAsias He struct se_device *se_dev = cmd->se_dev; 52343f55bbbSAsias He struct fd_dev *fd_dev = FD_DEV(se_dev); 52443f55bbbSAsias He struct file *file = fd_dev->fd_file; 52543f55bbbSAsias He sector_t lba = cmd->t_task_lba; 52643f55bbbSAsias He sector_t nolb = sbc_get_write_same_sectors(cmd); 5273abff1e5SChristoph Hellwig sense_reason_t ret; 52843f55bbbSAsias He 52943f55bbbSAsias He if (!nolb) { 53043f55bbbSAsias He target_complete_cmd(cmd, SAM_STAT_GOOD); 53143f55bbbSAsias He return 0; 53243f55bbbSAsias He } 53343f55bbbSAsias He 53443f55bbbSAsias He ret = fd_do_unmap(cmd, file, lba, nolb); 53543f55bbbSAsias He if (ret) 53643f55bbbSAsias He return ret; 53743f55bbbSAsias He 53870d3ae5cSAsias He target_complete_cmd(cmd, GOOD); 53970d3ae5cSAsias He return 0; 54070d3ae5cSAsias He } 54170d3ae5cSAsias He 54270d3ae5cSAsias He static sense_reason_t 54350642762SAsias He fd_execute_unmap(struct se_cmd *cmd) 54450642762SAsias He { 54586d71829SAsias He struct file *file = FD_DEV(cmd->se_dev)->fd_file; 54650642762SAsias He 54786d71829SAsias He return sbc_execute_unmap(cmd, fd_do_unmap, file); 54850642762SAsias He } 54950642762SAsias He 55050642762SAsias He static sense_reason_t 551a82a9538SNicholas Bellinger fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 552a82a9538SNicholas Bellinger enum dma_data_direction data_direction) 553c66ac9dbSNicholas Bellinger { 554c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 5558287fa5fSSagi Grimberg struct fd_dev *fd_dev = FD_DEV(dev); 5568287fa5fSSagi Grimberg struct file *file = fd_dev->fd_file; 5578287fa5fSSagi Grimberg struct file *pfile = fd_dev->fd_prot_file; 55842201b55SNicholas Bellinger sense_reason_t rc; 559c66ac9dbSNicholas Bellinger int ret = 0; 560046ba642SNicholas Bellinger /* 561046ba642SNicholas Bellinger * We are currently limited by the number of iovecs (2048) per 562046ba642SNicholas Bellinger * single vfs_[writev,readv] call. 563046ba642SNicholas Bellinger */ 564046ba642SNicholas Bellinger if (cmd->data_length > FD_MAX_BYTES) { 565046ba642SNicholas Bellinger pr_err("FILEIO: Not able to process I/O of %u bytes due to" 566046ba642SNicholas Bellinger "FD_MAX_BYTES: %u iovec count limitiation\n", 567046ba642SNicholas Bellinger cmd->data_length, FD_MAX_BYTES); 568046ba642SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 569046ba642SNicholas Bellinger } 570c66ac9dbSNicholas Bellinger /* 571c66ac9dbSNicholas Bellinger * Call vectorized fileio functions to map struct scatterlist 572c66ac9dbSNicholas Bellinger * physical memory addresses to struct iovec virtual memory. 573c66ac9dbSNicholas Bellinger */ 5745787cacdSChristoph Hellwig if (data_direction == DMA_FROM_DEVICE) { 575ee920469SNicholas Bellinger if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5768287fa5fSSagi Grimberg ret = fd_do_rw(cmd, pfile, dev->prot_length, 5778287fa5fSSagi Grimberg cmd->t_prot_sg, cmd->t_prot_nents, 5788287fa5fSSagi Grimberg cmd->prot_length, 0); 57942201b55SNicholas Bellinger if (ret < 0) 58042201b55SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 58142201b55SNicholas Bellinger } 58242201b55SNicholas Bellinger 5838287fa5fSSagi Grimberg ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, 5848287fa5fSSagi Grimberg sgl, sgl_nents, cmd->data_length, 0); 58542201b55SNicholas Bellinger 586ee920469SNicholas Bellinger if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5878287fa5fSSagi Grimberg u32 sectors = cmd->data_length >> 5888287fa5fSSagi Grimberg ilog2(dev->dev_attrib.block_size); 58942201b55SNicholas Bellinger 590f75b6faeSSagi Grimberg rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 591f75b6faeSSagi Grimberg 0, cmd->t_prot_sg, 0); 5928287fa5fSSagi Grimberg if (rc) 59342201b55SNicholas Bellinger return rc; 59442201b55SNicholas Bellinger } 5958287fa5fSSagi Grimberg } else { 5968287fa5fSSagi Grimberg if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5978287fa5fSSagi Grimberg u32 sectors = cmd->data_length >> 5988287fa5fSSagi Grimberg ilog2(dev->dev_attrib.block_size); 5998287fa5fSSagi Grimberg 6008287fa5fSSagi Grimberg rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 6018287fa5fSSagi Grimberg 0, cmd->t_prot_sg, 0); 6028287fa5fSSagi Grimberg if (rc) 6038287fa5fSSagi Grimberg return rc; 60442201b55SNicholas Bellinger } 60542201b55SNicholas Bellinger 6068287fa5fSSagi Grimberg ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, 6078287fa5fSSagi Grimberg sgl, sgl_nents, cmd->data_length, 1); 608a4dff304SNicholas Bellinger /* 609125d0119SHannes Reinecke * Perform implicit vfs_fsync_range() for fd_do_writev() ops 610a4dff304SNicholas Bellinger * for SCSI WRITEs with Forced Unit Access (FUA) set. 611a4dff304SNicholas Bellinger * Allow this to happen independent of WCE=0 setting. 612a4dff304SNicholas Bellinger */ 613814e5b45SChristoph Hellwig if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) { 614a4dff304SNicholas Bellinger loff_t start = cmd->t_task_lba * 6150fd97ccfSChristoph Hellwig dev->dev_attrib.block_size; 61662d3ab49SZach Brown loff_t end; 61762d3ab49SZach Brown 61862d3ab49SZach Brown if (cmd->data_length) 61962d3ab49SZach Brown end = start + cmd->data_length - 1; 62062d3ab49SZach Brown else 62162d3ab49SZach Brown end = LLONG_MAX; 622c66ac9dbSNicholas Bellinger 623a4dff304SNicholas Bellinger vfs_fsync_range(fd_dev->fd_file, start, end, 1); 624a4dff304SNicholas Bellinger } 625c66ac9dbSNicholas Bellinger 626ee920469SNicholas Bellinger if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { 6278287fa5fSSagi Grimberg ret = fd_do_rw(cmd, pfile, dev->prot_length, 6288287fa5fSSagi Grimberg cmd->t_prot_sg, cmd->t_prot_nents, 6298287fa5fSSagi Grimberg cmd->prot_length, 1); 630de103c93SChristoph Hellwig if (ret < 0) 631de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 63242201b55SNicholas Bellinger } 63342201b55SNicholas Bellinger } 63442201b55SNicholas Bellinger 6358287fa5fSSagi Grimberg if (ret < 0) 63642201b55SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 637de103c93SChristoph Hellwig 6385787cacdSChristoph Hellwig if (ret) 6395787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 64003e98c9eSNicholas Bellinger return 0; 641c66ac9dbSNicholas Bellinger } 642c66ac9dbSNicholas Bellinger 643c66ac9dbSNicholas Bellinger enum { 644c66ac9dbSNicholas Bellinger Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err 645c66ac9dbSNicholas Bellinger }; 646c66ac9dbSNicholas Bellinger 647c66ac9dbSNicholas Bellinger static match_table_t tokens = { 648c66ac9dbSNicholas Bellinger {Opt_fd_dev_name, "fd_dev_name=%s"}, 649c66ac9dbSNicholas Bellinger {Opt_fd_dev_size, "fd_dev_size=%s"}, 650b32f4c7eSNicholas Bellinger {Opt_fd_buffered_io, "fd_buffered_io=%d"}, 651c66ac9dbSNicholas Bellinger {Opt_err, NULL} 652c66ac9dbSNicholas Bellinger }; 653c66ac9dbSNicholas Bellinger 6540fd97ccfSChristoph Hellwig static ssize_t fd_set_configfs_dev_params(struct se_device *dev, 655c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 656c66ac9dbSNicholas Bellinger { 6570fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 658c66ac9dbSNicholas Bellinger char *orig, *ptr, *arg_p, *opts; 659c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 660b32f4c7eSNicholas Bellinger int ret = 0, arg, token; 661c66ac9dbSNicholas Bellinger 662c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 663c66ac9dbSNicholas Bellinger if (!opts) 664c66ac9dbSNicholas Bellinger return -ENOMEM; 665c66ac9dbSNicholas Bellinger 666c66ac9dbSNicholas Bellinger orig = opts; 667c66ac9dbSNicholas Bellinger 66890c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 669c66ac9dbSNicholas Bellinger if (!*ptr) 670c66ac9dbSNicholas Bellinger continue; 671c66ac9dbSNicholas Bellinger 672c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 673c66ac9dbSNicholas Bellinger switch (token) { 674c66ac9dbSNicholas Bellinger case Opt_fd_dev_name: 675dbc6e022SAl Viro if (match_strlcpy(fd_dev->fd_dev_name, &args[0], 676dbc6e022SAl Viro FD_MAX_DEV_NAME) == 0) { 677dbc6e022SAl Viro ret = -EINVAL; 6786d180253SJesper Juhl break; 6796d180253SJesper Juhl } 6806708bb27SAndy Grover pr_debug("FILEIO: Referencing Path: %s\n", 681c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name); 682c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_PATH; 683c66ac9dbSNicholas Bellinger break; 684c66ac9dbSNicholas Bellinger case Opt_fd_dev_size: 685c66ac9dbSNicholas Bellinger arg_p = match_strdup(&args[0]); 6866d180253SJesper Juhl if (!arg_p) { 6876d180253SJesper Juhl ret = -ENOMEM; 6886d180253SJesper Juhl break; 6896d180253SJesper Juhl } 69057103d7fSJingoo Han ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); 6916d180253SJesper Juhl kfree(arg_p); 692c66ac9dbSNicholas Bellinger if (ret < 0) { 69357103d7fSJingoo Han pr_err("kstrtoull() failed for" 694c66ac9dbSNicholas Bellinger " fd_dev_size=\n"); 695c66ac9dbSNicholas Bellinger goto out; 696c66ac9dbSNicholas Bellinger } 6976708bb27SAndy Grover pr_debug("FILEIO: Referencing Size: %llu" 698c66ac9dbSNicholas Bellinger " bytes\n", fd_dev->fd_dev_size); 699c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_SIZE; 700c66ac9dbSNicholas Bellinger break; 701b32f4c7eSNicholas Bellinger case Opt_fd_buffered_io: 702ce31c1b0SJoern Engel ret = match_int(args, &arg); 703ce31c1b0SJoern Engel if (ret) 704ce31c1b0SJoern Engel goto out; 705b32f4c7eSNicholas Bellinger if (arg != 1) { 706b32f4c7eSNicholas Bellinger pr_err("bogus fd_buffered_io=%d value\n", arg); 707b32f4c7eSNicholas Bellinger ret = -EINVAL; 708b32f4c7eSNicholas Bellinger goto out; 709b32f4c7eSNicholas Bellinger } 710b32f4c7eSNicholas Bellinger 711b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Using buffered I/O" 712b32f4c7eSNicholas Bellinger " operations for struct fd_dev\n"); 713b32f4c7eSNicholas Bellinger 714b32f4c7eSNicholas Bellinger fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; 715b32f4c7eSNicholas Bellinger break; 716c66ac9dbSNicholas Bellinger default: 717c66ac9dbSNicholas Bellinger break; 718c66ac9dbSNicholas Bellinger } 719c66ac9dbSNicholas Bellinger } 720c66ac9dbSNicholas Bellinger 721c66ac9dbSNicholas Bellinger out: 722c66ac9dbSNicholas Bellinger kfree(orig); 723c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 724c66ac9dbSNicholas Bellinger } 725c66ac9dbSNicholas Bellinger 7260fd97ccfSChristoph Hellwig static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) 727c66ac9dbSNicholas Bellinger { 7280fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 729c66ac9dbSNicholas Bellinger ssize_t bl = 0; 730c66ac9dbSNicholas Bellinger 731c66ac9dbSNicholas Bellinger bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); 732b32f4c7eSNicholas Bellinger bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", 733b32f4c7eSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size, 734b32f4c7eSNicholas Bellinger (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? 735b32f4c7eSNicholas Bellinger "Buffered-WCE" : "O_DSYNC"); 736c66ac9dbSNicholas Bellinger return bl; 737c66ac9dbSNicholas Bellinger } 738c66ac9dbSNicholas Bellinger 739c66ac9dbSNicholas Bellinger static sector_t fd_get_blocks(struct se_device *dev) 740c66ac9dbSNicholas Bellinger { 7410fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 742cd9323fdSNicholas Bellinger struct file *f = fd_dev->fd_file; 743cd9323fdSNicholas Bellinger struct inode *i = f->f_mapping->host; 744cd9323fdSNicholas Bellinger unsigned long long dev_size; 745cd9323fdSNicholas Bellinger /* 746cd9323fdSNicholas Bellinger * When using a file that references an underlying struct block_device, 747cd9323fdSNicholas Bellinger * ensure dev_size is always based on the current inode size in order 748cd9323fdSNicholas Bellinger * to handle underlying block_device resize operations. 749cd9323fdSNicholas Bellinger */ 750cd9323fdSNicholas Bellinger if (S_ISBLK(i->i_mode)) 75121363ca8SNicholas Bellinger dev_size = i_size_read(i); 752cd9323fdSNicholas Bellinger else 753cd9323fdSNicholas Bellinger dev_size = fd_dev->fd_dev_size; 754c66ac9dbSNicholas Bellinger 75521363ca8SNicholas Bellinger return div_u64(dev_size - dev->dev_attrib.block_size, 75621363ca8SNicholas Bellinger dev->dev_attrib.block_size); 757c66ac9dbSNicholas Bellinger } 758c66ac9dbSNicholas Bellinger 7590f5e2ec4SNicholas Bellinger static int fd_init_prot(struct se_device *dev) 7600f5e2ec4SNicholas Bellinger { 7610f5e2ec4SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(dev); 7620f5e2ec4SNicholas Bellinger struct file *prot_file, *file = fd_dev->fd_file; 7630f5e2ec4SNicholas Bellinger struct inode *inode; 7640f5e2ec4SNicholas Bellinger int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; 7650f5e2ec4SNicholas Bellinger char buf[FD_MAX_DEV_PROT_NAME]; 7660f5e2ec4SNicholas Bellinger 7670f5e2ec4SNicholas Bellinger if (!file) { 7680f5e2ec4SNicholas Bellinger pr_err("Unable to locate fd_dev->fd_file\n"); 7690f5e2ec4SNicholas Bellinger return -ENODEV; 7700f5e2ec4SNicholas Bellinger } 7710f5e2ec4SNicholas Bellinger 7720f5e2ec4SNicholas Bellinger inode = file->f_mapping->host; 7730f5e2ec4SNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 7740f5e2ec4SNicholas Bellinger pr_err("FILEIO Protection emulation only supported on" 7750f5e2ec4SNicholas Bellinger " !S_ISBLK\n"); 7760f5e2ec4SNicholas Bellinger return -ENOSYS; 7770f5e2ec4SNicholas Bellinger } 7780f5e2ec4SNicholas Bellinger 7790f5e2ec4SNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) 7800f5e2ec4SNicholas Bellinger flags &= ~O_DSYNC; 7810f5e2ec4SNicholas Bellinger 7820f5e2ec4SNicholas Bellinger snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", 7830f5e2ec4SNicholas Bellinger fd_dev->fd_dev_name); 7840f5e2ec4SNicholas Bellinger 7850f5e2ec4SNicholas Bellinger prot_file = filp_open(buf, flags, 0600); 7860f5e2ec4SNicholas Bellinger if (IS_ERR(prot_file)) { 7870f5e2ec4SNicholas Bellinger pr_err("filp_open(%s) failed\n", buf); 7880f5e2ec4SNicholas Bellinger ret = PTR_ERR(prot_file); 7890f5e2ec4SNicholas Bellinger return ret; 7900f5e2ec4SNicholas Bellinger } 7910f5e2ec4SNicholas Bellinger fd_dev->fd_prot_file = prot_file; 7920f5e2ec4SNicholas Bellinger 7930f5e2ec4SNicholas Bellinger return 0; 7940f5e2ec4SNicholas Bellinger } 7950f5e2ec4SNicholas Bellinger 7960f5e2ec4SNicholas Bellinger static int fd_format_prot(struct se_device *dev) 7970f5e2ec4SNicholas Bellinger { 7980f5e2ec4SNicholas Bellinger unsigned char *buf; 7990f5e2ec4SNicholas Bellinger int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; 80064d240b7SAkinobu Mita int ret; 8010f5e2ec4SNicholas Bellinger 8020f5e2ec4SNicholas Bellinger if (!dev->dev_attrib.pi_prot_type) { 8030f5e2ec4SNicholas Bellinger pr_err("Unable to format_prot while pi_prot_type == 0\n"); 8040f5e2ec4SNicholas Bellinger return -ENODEV; 8050f5e2ec4SNicholas Bellinger } 8060f5e2ec4SNicholas Bellinger 8070f5e2ec4SNicholas Bellinger buf = vzalloc(unit_size); 8080f5e2ec4SNicholas Bellinger if (!buf) { 8090f5e2ec4SNicholas Bellinger pr_err("Unable to allocate FILEIO prot buf\n"); 8100f5e2ec4SNicholas Bellinger return -ENOMEM; 8110f5e2ec4SNicholas Bellinger } 8120f5e2ec4SNicholas Bellinger 8130f5e2ec4SNicholas Bellinger pr_debug("Using FILEIO prot_length: %llu\n", 81464d240b7SAkinobu Mita (unsigned long long)(dev->transport->get_blocks(dev) + 1) * 81564d240b7SAkinobu Mita dev->prot_length); 8160f5e2ec4SNicholas Bellinger 81780dcd0c1SSagi Grimberg memset(buf, 0xff, unit_size); 81864d240b7SAkinobu Mita ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, 81964d240b7SAkinobu Mita buf, unit_size); 8200f5e2ec4SNicholas Bellinger vfree(buf); 8210f5e2ec4SNicholas Bellinger return ret; 8220f5e2ec4SNicholas Bellinger } 8230f5e2ec4SNicholas Bellinger 8240f5e2ec4SNicholas Bellinger static void fd_free_prot(struct se_device *dev) 8250f5e2ec4SNicholas Bellinger { 8260f5e2ec4SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(dev); 8270f5e2ec4SNicholas Bellinger 8280f5e2ec4SNicholas Bellinger if (!fd_dev->fd_prot_file) 8290f5e2ec4SNicholas Bellinger return; 8300f5e2ec4SNicholas Bellinger 8310f5e2ec4SNicholas Bellinger filp_close(fd_dev->fd_prot_file, NULL); 8320f5e2ec4SNicholas Bellinger fd_dev->fd_prot_file = NULL; 8330f5e2ec4SNicholas Bellinger } 8340f5e2ec4SNicholas Bellinger 8359e999a6cSChristoph Hellwig static struct sbc_ops fd_sbc_ops = { 8360c2ad7d1SChristoph Hellwig .execute_rw = fd_execute_rw, 837ad67f0d9SChristoph Hellwig .execute_sync_cache = fd_execute_sync_cache, 8387b745c84SNicholas Bellinger .execute_write_same = fd_execute_write_same, 83970d3ae5cSAsias He .execute_write_same_unmap = fd_execute_write_same_unmap, 84050642762SAsias He .execute_unmap = fd_execute_unmap, 8410c2ad7d1SChristoph Hellwig }; 8420c2ad7d1SChristoph Hellwig 843de103c93SChristoph Hellwig static sense_reason_t 844de103c93SChristoph Hellwig fd_parse_cdb(struct se_cmd *cmd) 8450c2ad7d1SChristoph Hellwig { 8469e999a6cSChristoph Hellwig return sbc_parse_cdb(cmd, &fd_sbc_ops); 8470c2ad7d1SChristoph Hellwig } 8480c2ad7d1SChristoph Hellwig 849b2320497SNicholas Bellinger DEF_TB_DEFAULT_ATTRIBS(fileio); 850b2320497SNicholas Bellinger 851b2320497SNicholas Bellinger static struct configfs_attribute *fileio_backend_dev_attrs[] = { 852b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_model_alias.attr, 853b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_dpo.attr, 854b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_fua_write.attr, 855b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_fua_read.attr, 856b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_write_cache.attr, 857b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr, 858b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_tas.attr, 859b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_tpu.attr, 860b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_tpws.attr, 861b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_caw.attr, 862b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_3pc.attr, 863b2320497SNicholas Bellinger &fileio_dev_attrib_pi_prot_type.attr, 864b2320497SNicholas Bellinger &fileio_dev_attrib_hw_pi_prot_type.attr, 865b2320497SNicholas Bellinger &fileio_dev_attrib_pi_prot_format.attr, 866b2320497SNicholas Bellinger &fileio_dev_attrib_enforce_pr_isids.attr, 867b2320497SNicholas Bellinger &fileio_dev_attrib_is_nonrot.attr, 868b2320497SNicholas Bellinger &fileio_dev_attrib_emulate_rest_reord.attr, 869b2320497SNicholas Bellinger &fileio_dev_attrib_force_pr_aptpl.attr, 870b2320497SNicholas Bellinger &fileio_dev_attrib_hw_block_size.attr, 871b2320497SNicholas Bellinger &fileio_dev_attrib_block_size.attr, 872b2320497SNicholas Bellinger &fileio_dev_attrib_hw_max_sectors.attr, 873b2320497SNicholas Bellinger &fileio_dev_attrib_optimal_sectors.attr, 874b2320497SNicholas Bellinger &fileio_dev_attrib_hw_queue_depth.attr, 875b2320497SNicholas Bellinger &fileio_dev_attrib_queue_depth.attr, 876b2320497SNicholas Bellinger &fileio_dev_attrib_max_unmap_lba_count.attr, 877b2320497SNicholas Bellinger &fileio_dev_attrib_max_unmap_block_desc_count.attr, 878b2320497SNicholas Bellinger &fileio_dev_attrib_unmap_granularity.attr, 879b2320497SNicholas Bellinger &fileio_dev_attrib_unmap_granularity_alignment.attr, 880b2320497SNicholas Bellinger &fileio_dev_attrib_max_write_same_len.attr, 881b2320497SNicholas Bellinger NULL, 882b2320497SNicholas Bellinger }; 883b2320497SNicholas Bellinger 884c66ac9dbSNicholas Bellinger static struct se_subsystem_api fileio_template = { 885c66ac9dbSNicholas Bellinger .name = "fileio", 8860fd97ccfSChristoph Hellwig .inquiry_prod = "FILEIO", 8870fd97ccfSChristoph Hellwig .inquiry_rev = FD_VERSION, 888c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 889c66ac9dbSNicholas Bellinger .attach_hba = fd_attach_hba, 890c66ac9dbSNicholas Bellinger .detach_hba = fd_detach_hba, 8910fd97ccfSChristoph Hellwig .alloc_device = fd_alloc_device, 8920fd97ccfSChristoph Hellwig .configure_device = fd_configure_device, 893c66ac9dbSNicholas Bellinger .free_device = fd_free_device, 8940c2ad7d1SChristoph Hellwig .parse_cdb = fd_parse_cdb, 895c66ac9dbSNicholas Bellinger .set_configfs_dev_params = fd_set_configfs_dev_params, 896c66ac9dbSNicholas Bellinger .show_configfs_dev_params = fd_show_configfs_dev_params, 8976f23ac8aSChristoph Hellwig .get_device_type = sbc_get_device_type, 898c66ac9dbSNicholas Bellinger .get_blocks = fd_get_blocks, 8990f5e2ec4SNicholas Bellinger .init_prot = fd_init_prot, 9000f5e2ec4SNicholas Bellinger .format_prot = fd_format_prot, 9010f5e2ec4SNicholas Bellinger .free_prot = fd_free_prot, 902c66ac9dbSNicholas Bellinger }; 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger static int __init fileio_module_init(void) 905c66ac9dbSNicholas Bellinger { 906b2320497SNicholas Bellinger struct target_backend_cits *tbc = &fileio_template.tb_cits; 907b2320497SNicholas Bellinger 908b2320497SNicholas Bellinger target_core_setup_sub_cits(&fileio_template); 909b2320497SNicholas Bellinger tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs; 910b2320497SNicholas Bellinger 911c66ac9dbSNicholas Bellinger return transport_subsystem_register(&fileio_template); 912c66ac9dbSNicholas Bellinger } 913c66ac9dbSNicholas Bellinger 91463b91d5aSAsias He static void __exit fileio_module_exit(void) 915c66ac9dbSNicholas Bellinger { 916c66ac9dbSNicholas Bellinger transport_subsystem_release(&fileio_template); 917c66ac9dbSNicholas Bellinger } 918c66ac9dbSNicholas Bellinger 919c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); 920c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 921c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 922c66ac9dbSNicholas Bellinger 923c66ac9dbSNicholas Bellinger module_init(fileio_module_init); 924c66ac9dbSNicholas Bellinger module_exit(fileio_module_exit); 925