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> 335538d294SDavid S. Miller #include <linux/vmalloc.h> 3470d3ae5cSAsias He #include <linux/falloc.h> 358dcf07beSBart Van Assche #include <linux/uio.h> 36ba929992SBart Van Assche #include <scsi/scsi_proto.h> 3750642762SAsias He #include <asm/unaligned.h> 38c66ac9dbSNicholas Bellinger 39c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 40c4795fb2SChristoph Hellwig #include <target/target_core_backend.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 static int fd_attach_hba(struct se_hba *hba, u32 host_id) 50c66ac9dbSNicholas Bellinger { 51c66ac9dbSNicholas Bellinger struct fd_host *fd_host; 52c66ac9dbSNicholas Bellinger 53c66ac9dbSNicholas Bellinger fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); 546708bb27SAndy Grover if (!fd_host) { 556708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_host\n"); 56e3d6f909SAndy Grover return -ENOMEM; 57c66ac9dbSNicholas Bellinger } 58c66ac9dbSNicholas Bellinger 59c66ac9dbSNicholas Bellinger fd_host->fd_host_id = host_id; 60c66ac9dbSNicholas Bellinger 61e3d6f909SAndy Grover hba->hba_ptr = fd_host; 62c66ac9dbSNicholas Bellinger 636708bb27SAndy Grover pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" 64c66ac9dbSNicholas Bellinger " Target Core Stack %s\n", hba->hba_id, FD_VERSION, 65ce8dd25dSChristoph Hellwig TARGET_CORE_VERSION); 6695cadaceSNicholas Bellinger pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", 6795cadaceSNicholas Bellinger hba->hba_id, fd_host->fd_host_id); 68c66ac9dbSNicholas Bellinger 69c66ac9dbSNicholas Bellinger return 0; 70c66ac9dbSNicholas Bellinger } 71c66ac9dbSNicholas Bellinger 72c66ac9dbSNicholas Bellinger static void fd_detach_hba(struct se_hba *hba) 73c66ac9dbSNicholas Bellinger { 74c66ac9dbSNicholas Bellinger struct fd_host *fd_host = hba->hba_ptr; 75c66ac9dbSNicholas Bellinger 766708bb27SAndy Grover pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" 77c66ac9dbSNicholas Bellinger " Target Core\n", hba->hba_id, fd_host->fd_host_id); 78c66ac9dbSNicholas Bellinger 79c66ac9dbSNicholas Bellinger kfree(fd_host); 80c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 81c66ac9dbSNicholas Bellinger } 82c66ac9dbSNicholas Bellinger 830fd97ccfSChristoph Hellwig static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) 84c66ac9dbSNicholas Bellinger { 85c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev; 868359cf43SJörn Engel struct fd_host *fd_host = hba->hba_ptr; 87c66ac9dbSNicholas Bellinger 88c66ac9dbSNicholas Bellinger fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); 896708bb27SAndy Grover if (!fd_dev) { 906708bb27SAndy Grover pr_err("Unable to allocate memory for struct fd_dev\n"); 91c66ac9dbSNicholas Bellinger return NULL; 92c66ac9dbSNicholas Bellinger } 93c66ac9dbSNicholas Bellinger 94c66ac9dbSNicholas Bellinger fd_dev->fd_host = fd_host; 95c66ac9dbSNicholas Bellinger 966708bb27SAndy Grover pr_debug("FILEIO: Allocated fd_dev for %p\n", name); 97c66ac9dbSNicholas Bellinger 980fd97ccfSChristoph Hellwig return &fd_dev->dev; 99c66ac9dbSNicholas Bellinger } 100c66ac9dbSNicholas Bellinger 1010fd97ccfSChristoph Hellwig static int fd_configure_device(struct se_device *dev) 102c66ac9dbSNicholas Bellinger { 1030fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 1040fd97ccfSChristoph Hellwig struct fd_host *fd_host = dev->se_hba->hba_ptr; 105c66ac9dbSNicholas Bellinger struct file *file; 106c66ac9dbSNicholas Bellinger struct inode *inode = NULL; 1070fd97ccfSChristoph Hellwig int flags, ret = -EINVAL; 108c66ac9dbSNicholas Bellinger 1090fd97ccfSChristoph Hellwig if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { 1100fd97ccfSChristoph Hellwig pr_err("Missing fd_dev_name=\n"); 1110fd97ccfSChristoph Hellwig return -EINVAL; 1120fd97ccfSChristoph Hellwig } 113c66ac9dbSNicholas Bellinger 114c66ac9dbSNicholas Bellinger /* 115a4dff304SNicholas Bellinger * Use O_DSYNC by default instead of O_SYNC to forgo syncing 116a4dff304SNicholas Bellinger * of pure timestamp updates. 117c66ac9dbSNicholas Bellinger */ 118a4dff304SNicholas Bellinger flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; 1190fd97ccfSChristoph Hellwig 120b32f4c7eSNicholas Bellinger /* 121b32f4c7eSNicholas Bellinger * Optionally allow fd_buffered_io=1 to be enabled for people 122b32f4c7eSNicholas Bellinger * who want use the fs buffer cache as an WriteCache mechanism. 123b32f4c7eSNicholas Bellinger * 124b32f4c7eSNicholas Bellinger * This means that in event of a hard failure, there is a risk 125b32f4c7eSNicholas Bellinger * of silent data-loss if the SCSI client has *not* performed a 126b32f4c7eSNicholas Bellinger * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE 127b32f4c7eSNicholas Bellinger * to write-out the entire device cache. 128b32f4c7eSNicholas Bellinger */ 129b32f4c7eSNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { 130b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); 131b32f4c7eSNicholas Bellinger flags &= ~O_DSYNC; 132b32f4c7eSNicholas Bellinger } 133c66ac9dbSNicholas Bellinger 134dbc6e022SAl Viro file = filp_open(fd_dev->fd_dev_name, flags, 0600); 135613640e4SNicholas Bellinger if (IS_ERR(file)) { 136dbc6e022SAl Viro pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); 137613640e4SNicholas Bellinger ret = PTR_ERR(file); 138613640e4SNicholas Bellinger goto fail; 139613640e4SNicholas Bellinger } 140c66ac9dbSNicholas Bellinger fd_dev->fd_file = file; 141c66ac9dbSNicholas Bellinger /* 142c66ac9dbSNicholas Bellinger * If using a block backend with this struct file, we extract 143c66ac9dbSNicholas Bellinger * fd_dev->fd_[block,dev]_size from struct block_device. 144c66ac9dbSNicholas Bellinger * 145c66ac9dbSNicholas Bellinger * Otherwise, we use the passed fd_size= from configfs 146c66ac9dbSNicholas Bellinger */ 147c66ac9dbSNicholas Bellinger inode = file->f_mapping->host; 148c66ac9dbSNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 1490fd97ccfSChristoph Hellwig struct request_queue *q = bdev_get_queue(inode->i_bdev); 150cd9323fdSNicholas Bellinger unsigned long long dev_size; 1510fd97ccfSChristoph Hellwig 15221363ca8SNicholas Bellinger fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); 153c66ac9dbSNicholas Bellinger /* 154c66ac9dbSNicholas Bellinger * Determine the number of bytes from i_size_read() minus 155c66ac9dbSNicholas Bellinger * one (1) logical sector from underlying struct block_device 156c66ac9dbSNicholas Bellinger */ 157cd9323fdSNicholas Bellinger dev_size = (i_size_read(file->f_mapping->host) - 158c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 159c66ac9dbSNicholas Bellinger 1606708bb27SAndy Grover pr_debug("FILEIO: Using size: %llu bytes from struct" 161c66ac9dbSNicholas Bellinger " block_device blocks: %llu logical_block_size: %d\n", 162cd9323fdSNicholas Bellinger dev_size, div_u64(dev_size, fd_dev->fd_block_size), 163c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 1648a9ebe71SMike Christie 165ea263c7fSMike Christie if (target_configure_unmap_from_queue(&dev->dev_attrib, q)) 16670d3ae5cSAsias He pr_debug("IFILE: BLOCK Discard support available," 16770d3ae5cSAsias He " disabled by default\n"); 16870d3ae5cSAsias He /* 16970d3ae5cSAsias He * Enable write same emulation for IBLOCK and use 0xFFFF as 17070d3ae5cSAsias He * the smaller WRITE_SAME(10) only has a two-byte block count. 17170d3ae5cSAsias He */ 17270d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0xFFFF; 1730463a3feSAsias He 1740463a3feSAsias He if (blk_queue_nonrot(q)) 1750463a3feSAsias He dev->dev_attrib.is_nonrot = 1; 176c66ac9dbSNicholas Bellinger } else { 177c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { 1786708bb27SAndy Grover pr_err("FILEIO: Missing fd_dev_size=" 179c66ac9dbSNicholas Bellinger " parameter, and no backing struct" 180c66ac9dbSNicholas Bellinger " block_device\n"); 181c66ac9dbSNicholas Bellinger goto fail; 182c66ac9dbSNicholas Bellinger } 183c66ac9dbSNicholas Bellinger 18421363ca8SNicholas Bellinger fd_dev->fd_block_size = FD_BLOCKSIZE; 18570d3ae5cSAsias He /* 18670d3ae5cSAsias He * Limit UNMAP emulation to 8k Number of LBAs (NoLB) 18770d3ae5cSAsias He */ 18870d3ae5cSAsias He dev->dev_attrib.max_unmap_lba_count = 0x2000; 18970d3ae5cSAsias He /* 19070d3ae5cSAsias He * Currently hardcoded to 1 in Linux/SCSI code.. 19170d3ae5cSAsias He */ 19270d3ae5cSAsias He dev->dev_attrib.max_unmap_block_desc_count = 1; 19370d3ae5cSAsias He dev->dev_attrib.unmap_granularity = 1; 19470d3ae5cSAsias He dev->dev_attrib.unmap_granularity_alignment = 0; 19570d3ae5cSAsias He 19670d3ae5cSAsias He /* 19770d3ae5cSAsias He * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) 19870d3ae5cSAsias He * based upon struct iovec limit for vfs_writev() 19970d3ae5cSAsias He */ 20070d3ae5cSAsias He dev->dev_attrib.max_write_same_len = 0x1000; 201c66ac9dbSNicholas Bellinger } 202c66ac9dbSNicholas Bellinger 20321363ca8SNicholas Bellinger dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; 20495cadaceSNicholas Bellinger dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; 20595cadaceSNicholas Bellinger dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; 2060fd97ccfSChristoph Hellwig dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; 207c66ac9dbSNicholas Bellinger 208b32f4c7eSNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { 209b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" 210b32f4c7eSNicholas Bellinger " with FDBD_HAS_BUFFERED_IO_WCE\n"); 2110fd97ccfSChristoph Hellwig dev->dev_attrib.emulate_write_cache = 1; 212b32f4c7eSNicholas Bellinger } 213b32f4c7eSNicholas Bellinger 214c66ac9dbSNicholas Bellinger fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; 215c66ac9dbSNicholas Bellinger fd_dev->fd_queue_depth = dev->queue_depth; 216c66ac9dbSNicholas Bellinger 2176708bb27SAndy Grover pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," 218c66ac9dbSNicholas Bellinger " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, 219c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size); 220c66ac9dbSNicholas Bellinger 2210fd97ccfSChristoph Hellwig return 0; 222c66ac9dbSNicholas Bellinger fail: 223c66ac9dbSNicholas Bellinger if (fd_dev->fd_file) { 224c66ac9dbSNicholas Bellinger filp_close(fd_dev->fd_file, NULL); 225c66ac9dbSNicholas Bellinger fd_dev->fd_file = NULL; 226c66ac9dbSNicholas Bellinger } 2270fd97ccfSChristoph Hellwig return ret; 228c66ac9dbSNicholas Bellinger } 229c66ac9dbSNicholas Bellinger 2304cc987eaSNicholas Bellinger static void fd_dev_call_rcu(struct rcu_head *p) 2314cc987eaSNicholas Bellinger { 2324cc987eaSNicholas Bellinger struct se_device *dev = container_of(p, struct se_device, rcu_head); 2334cc987eaSNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(dev); 2344cc987eaSNicholas Bellinger 2354cc987eaSNicholas Bellinger kfree(fd_dev); 2364cc987eaSNicholas Bellinger } 2374cc987eaSNicholas Bellinger 2380fd97ccfSChristoph Hellwig static void fd_free_device(struct se_device *dev) 239c66ac9dbSNicholas Bellinger { 2400fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 241c66ac9dbSNicholas Bellinger 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 } 2464cc987eaSNicholas Bellinger call_rcu(&dev->rcu_head, fd_dev_call_rcu); 247c66ac9dbSNicholas Bellinger } 248c66ac9dbSNicholas Bellinger 2498287fa5fSSagi Grimberg static int fd_do_rw(struct se_cmd *cmd, struct file *fd, 2508287fa5fSSagi Grimberg u32 block_size, struct scatterlist *sgl, 2518287fa5fSSagi Grimberg u32 sgl_nents, u32 data_length, int is_write) 25242201b55SNicholas Bellinger { 2535787cacdSChristoph Hellwig struct scatterlist *sg; 2546b9a44d0SChristoph Hellwig struct iov_iter iter; 2556b9a44d0SChristoph Hellwig struct bio_vec *bvec; 2566b9a44d0SChristoph Hellwig ssize_t len = 0; 2578287fa5fSSagi Grimberg loff_t pos = (cmd->t_task_lba * block_size); 258c66ac9dbSNicholas Bellinger int ret = 0, i; 259c66ac9dbSNicholas Bellinger 2606b9a44d0SChristoph Hellwig bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); 2616b9a44d0SChristoph Hellwig if (!bvec) { 2626708bb27SAndy Grover pr_err("Unable to allocate fd_do_readv iov[]\n"); 263e3d6f909SAndy Grover return -ENOMEM; 264c66ac9dbSNicholas Bellinger } 265c66ac9dbSNicholas Bellinger 2665787cacdSChristoph Hellwig for_each_sg(sgl, sg, sgl_nents, i) { 2676b9a44d0SChristoph Hellwig bvec[i].bv_page = sg_page(sg); 2686b9a44d0SChristoph Hellwig bvec[i].bv_len = sg->length; 2696b9a44d0SChristoph Hellwig bvec[i].bv_offset = sg->offset; 2706b9a44d0SChristoph Hellwig 2716b9a44d0SChristoph Hellwig len += sg->length; 272c66ac9dbSNicholas Bellinger } 273c66ac9dbSNicholas Bellinger 2746b9a44d0SChristoph Hellwig iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); 275778229afSSebastian Andrzej Siewior if (is_write) 2766b9a44d0SChristoph Hellwig ret = vfs_iter_write(fd, &iter, &pos); 277778229afSSebastian Andrzej Siewior else 2786b9a44d0SChristoph Hellwig ret = vfs_iter_read(fd, &iter, &pos); 279778229afSSebastian Andrzej Siewior 2806b9a44d0SChristoph Hellwig kfree(bvec); 281778229afSSebastian Andrzej Siewior 282778229afSSebastian Andrzej Siewior if (is_write) { 2838287fa5fSSagi Grimberg if (ret < 0 || ret != data_length) { 284778229afSSebastian Andrzej Siewior pr_err("%s() write returned %d\n", __func__, ret); 285778229afSSebastian Andrzej Siewior return (ret < 0 ? ret : -EINVAL); 286778229afSSebastian Andrzej Siewior } 287778229afSSebastian Andrzej Siewior } else { 288c66ac9dbSNicholas Bellinger /* 289c66ac9dbSNicholas Bellinger * Return zeros and GOOD status even if the READ did not return 290c66ac9dbSNicholas Bellinger * the expected virt_size for struct file w/o a backing struct 291c66ac9dbSNicholas Bellinger * block_device. 292c66ac9dbSNicholas Bellinger */ 293496ad9aaSAl Viro if (S_ISBLK(file_inode(fd)->i_mode)) { 2948287fa5fSSagi Grimberg if (ret < 0 || ret != data_length) { 295778229afSSebastian Andrzej Siewior pr_err("%s() returned %d, expecting %u for " 296778229afSSebastian Andrzej Siewior "S_ISBLK\n", __func__, ret, 2978287fa5fSSagi Grimberg data_length); 298e3d6f909SAndy Grover return (ret < 0 ? ret : -EINVAL); 299c66ac9dbSNicholas Bellinger } 300c66ac9dbSNicholas Bellinger } else { 301c66ac9dbSNicholas Bellinger if (ret < 0) { 302778229afSSebastian Andrzej Siewior pr_err("%s() returned %d for non S_ISBLK\n", 303778229afSSebastian Andrzej Siewior __func__, ret); 304e3d6f909SAndy Grover return ret; 305c66ac9dbSNicholas Bellinger } 306c66ac9dbSNicholas Bellinger } 307c66ac9dbSNicholas Bellinger } 308c66ac9dbSNicholas Bellinger return 1; 309c66ac9dbSNicholas Bellinger } 310c66ac9dbSNicholas Bellinger 311de103c93SChristoph Hellwig static sense_reason_t 312de103c93SChristoph Hellwig fd_execute_sync_cache(struct se_cmd *cmd) 313c66ac9dbSNicholas Bellinger { 314c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 3150fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 316a1d8b49aSAndy Grover int immed = (cmd->t_task_cdb[1] & 0x2); 317c66ac9dbSNicholas Bellinger loff_t start, end; 318c66ac9dbSNicholas Bellinger int ret; 319c66ac9dbSNicholas Bellinger 320c66ac9dbSNicholas Bellinger /* 321c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 322c66ac9dbSNicholas Bellinger * for this SYNCHRONIZE_CACHE op 323c66ac9dbSNicholas Bellinger */ 324c66ac9dbSNicholas Bellinger if (immed) 3255787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 326c66ac9dbSNicholas Bellinger 327c66ac9dbSNicholas Bellinger /* 328c66ac9dbSNicholas Bellinger * Determine if we will be flushing the entire device. 329c66ac9dbSNicholas Bellinger */ 330a1d8b49aSAndy Grover if (cmd->t_task_lba == 0 && cmd->data_length == 0) { 331c66ac9dbSNicholas Bellinger start = 0; 332c66ac9dbSNicholas Bellinger end = LLONG_MAX; 333c66ac9dbSNicholas Bellinger } else { 3340fd97ccfSChristoph Hellwig start = cmd->t_task_lba * dev->dev_attrib.block_size; 335c66ac9dbSNicholas Bellinger if (cmd->data_length) 33662d3ab49SZach Brown end = start + cmd->data_length - 1; 337c66ac9dbSNicholas Bellinger else 338c66ac9dbSNicholas Bellinger end = LLONG_MAX; 339c66ac9dbSNicholas Bellinger } 340c66ac9dbSNicholas Bellinger 341c66ac9dbSNicholas Bellinger ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); 342c66ac9dbSNicholas Bellinger if (ret != 0) 3436708bb27SAndy Grover pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); 344c66ac9dbSNicholas Bellinger 3455787cacdSChristoph Hellwig if (immed) 346ad67f0d9SChristoph Hellwig return 0; 3475787cacdSChristoph Hellwig 348de103c93SChristoph Hellwig if (ret) 3495787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); 350de103c93SChristoph Hellwig else 3515787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 352ad67f0d9SChristoph Hellwig 353ad67f0d9SChristoph Hellwig return 0; 354c66ac9dbSNicholas Bellinger } 355c66ac9dbSNicholas Bellinger 3567b745c84SNicholas Bellinger static sense_reason_t 3577b745c84SNicholas Bellinger fd_execute_write_same(struct se_cmd *cmd) 3587b745c84SNicholas Bellinger { 3597b745c84SNicholas Bellinger struct se_device *se_dev = cmd->se_dev; 3607b745c84SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(se_dev); 3617b745c84SNicholas Bellinger loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; 362d4c5dcacSChristoph Hellwig sector_t nolb = sbc_get_write_same_sectors(cmd); 363d4c5dcacSChristoph Hellwig struct iov_iter iter; 364d4c5dcacSChristoph Hellwig struct bio_vec *bvec; 365d4c5dcacSChristoph Hellwig unsigned int len = 0, i; 366d4c5dcacSChristoph Hellwig ssize_t ret; 3677b745c84SNicholas Bellinger 3687b745c84SNicholas Bellinger if (!nolb) { 3697b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 3707b745c84SNicholas Bellinger return 0; 3717b745c84SNicholas Bellinger } 372afd73f1bSNicholas Bellinger if (cmd->prot_op) { 373afd73f1bSNicholas Bellinger pr_err("WRITE_SAME: Protection information with FILEIO" 374afd73f1bSNicholas Bellinger " backends not supported\n"); 375afd73f1bSNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 376afd73f1bSNicholas Bellinger } 3777b745c84SNicholas Bellinger 3787b745c84SNicholas Bellinger if (cmd->t_data_nents > 1 || 379d4c5dcacSChristoph Hellwig cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { 3807b745c84SNicholas Bellinger pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" 381d4c5dcacSChristoph Hellwig " block_size: %u\n", 382d4c5dcacSChristoph Hellwig cmd->t_data_nents, 383d4c5dcacSChristoph Hellwig cmd->t_data_sg[0].length, 3847b745c84SNicholas Bellinger cmd->se_dev->dev_attrib.block_size); 3857b745c84SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 3867b745c84SNicholas Bellinger } 3877b745c84SNicholas Bellinger 388d4c5dcacSChristoph Hellwig bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); 389d4c5dcacSChristoph Hellwig if (!bvec) 3907b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 3917b745c84SNicholas Bellinger 392d4c5dcacSChristoph Hellwig for (i = 0; i < nolb; i++) { 393d4c5dcacSChristoph Hellwig bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); 394d4c5dcacSChristoph Hellwig bvec[i].bv_len = cmd->t_data_sg[0].length; 395d4c5dcacSChristoph Hellwig bvec[i].bv_offset = cmd->t_data_sg[0].offset; 396d4c5dcacSChristoph Hellwig 397d4c5dcacSChristoph Hellwig len += se_dev->dev_attrib.block_size; 3987b745c84SNicholas Bellinger } 3997b745c84SNicholas Bellinger 400d4c5dcacSChristoph Hellwig iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); 401d4c5dcacSChristoph Hellwig ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); 4027b745c84SNicholas Bellinger 403d4c5dcacSChristoph Hellwig kfree(bvec); 404d4c5dcacSChristoph Hellwig if (ret < 0 || ret != len) { 405d4c5dcacSChristoph Hellwig pr_err("vfs_iter_write() returned %zd for write same\n", ret); 4067b745c84SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 4077b745c84SNicholas Bellinger } 4087b745c84SNicholas Bellinger 4097b745c84SNicholas Bellinger target_complete_cmd(cmd, SAM_STAT_GOOD); 4107b745c84SNicholas Bellinger return 0; 4117b745c84SNicholas Bellinger } 4127b745c84SNicholas Bellinger 41364d240b7SAkinobu Mita static int 41464d240b7SAkinobu Mita fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, 41564d240b7SAkinobu Mita void *buf, size_t bufsize) 41664d240b7SAkinobu Mita { 41764d240b7SAkinobu Mita struct fd_dev *fd_dev = FD_DEV(se_dev); 41864d240b7SAkinobu Mita struct file *prot_fd = fd_dev->fd_prot_file; 41964d240b7SAkinobu Mita sector_t prot_length, prot; 42064d240b7SAkinobu Mita loff_t pos = lba * se_dev->prot_length; 42164d240b7SAkinobu Mita 42264d240b7SAkinobu Mita if (!prot_fd) { 42364d240b7SAkinobu Mita pr_err("Unable to locate fd_dev->fd_prot_file\n"); 42464d240b7SAkinobu Mita return -ENODEV; 42564d240b7SAkinobu Mita } 42664d240b7SAkinobu Mita 42764d240b7SAkinobu Mita prot_length = nolb * se_dev->prot_length; 42864d240b7SAkinobu Mita 42964d240b7SAkinobu Mita for (prot = 0; prot < prot_length;) { 43064d240b7SAkinobu Mita sector_t len = min_t(sector_t, bufsize, prot_length - prot); 43164d240b7SAkinobu Mita ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot); 43264d240b7SAkinobu Mita 43364d240b7SAkinobu Mita if (ret != len) { 43464d240b7SAkinobu Mita pr_err("vfs_write to prot file failed: %zd\n", ret); 43564d240b7SAkinobu Mita return ret < 0 ? ret : -ENODEV; 43664d240b7SAkinobu Mita } 43764d240b7SAkinobu Mita prot += ret; 43864d240b7SAkinobu Mita } 43964d240b7SAkinobu Mita 44064d240b7SAkinobu Mita return 0; 44164d240b7SAkinobu Mita } 44264d240b7SAkinobu Mita 44364d240b7SAkinobu Mita static int 44464d240b7SAkinobu Mita fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) 44564d240b7SAkinobu Mita { 44664d240b7SAkinobu Mita void *buf; 44764d240b7SAkinobu Mita int rc; 44864d240b7SAkinobu Mita 44964d240b7SAkinobu Mita buf = (void *)__get_free_page(GFP_KERNEL); 45064d240b7SAkinobu Mita if (!buf) { 45164d240b7SAkinobu Mita pr_err("Unable to allocate FILEIO prot buf\n"); 45264d240b7SAkinobu Mita return -ENOMEM; 45364d240b7SAkinobu Mita } 45464d240b7SAkinobu Mita memset(buf, 0xff, PAGE_SIZE); 45564d240b7SAkinobu Mita 45664d240b7SAkinobu Mita rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); 45764d240b7SAkinobu Mita 45864d240b7SAkinobu Mita free_page((unsigned long)buf); 45964d240b7SAkinobu Mita 46064d240b7SAkinobu Mita return rc; 46164d240b7SAkinobu Mita } 46264d240b7SAkinobu Mita 463de103c93SChristoph Hellwig static sense_reason_t 46462e46942SChristoph Hellwig fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) 46570d3ae5cSAsias He { 46662e46942SChristoph Hellwig struct file *file = FD_DEV(cmd->se_dev)->fd_file; 46770d3ae5cSAsias He struct inode *inode = file->f_mapping->host; 46870d3ae5cSAsias He int ret; 46970d3ae5cSAsias He 47064d240b7SAkinobu Mita if (cmd->se_dev->dev_attrib.pi_prot_type) { 47164d240b7SAkinobu Mita ret = fd_do_prot_unmap(cmd, lba, nolb); 47264d240b7SAkinobu Mita if (ret) 47364d240b7SAkinobu Mita return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 47464d240b7SAkinobu Mita } 47564d240b7SAkinobu Mita 47670d3ae5cSAsias He if (S_ISBLK(inode->i_mode)) { 47770d3ae5cSAsias He /* The backend is block device, use discard */ 47870d3ae5cSAsias He struct block_device *bdev = inode->i_bdev; 4798a9ebe71SMike Christie struct se_device *dev = cmd->se_dev; 48070d3ae5cSAsias He 4818a9ebe71SMike Christie ret = blkdev_issue_discard(bdev, 4828a9ebe71SMike Christie target_to_linux_sector(dev, lba), 4838a9ebe71SMike Christie target_to_linux_sector(dev, nolb), 4848a9ebe71SMike Christie GFP_KERNEL, 0); 48570d3ae5cSAsias He if (ret < 0) { 48670d3ae5cSAsias He pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", 48770d3ae5cSAsias He ret); 48870d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 48970d3ae5cSAsias He } 49070d3ae5cSAsias He } else { 49170d3ae5cSAsias He /* The backend is normal file, use fallocate */ 49243f55bbbSAsias He struct se_device *se_dev = cmd->se_dev; 49343f55bbbSAsias He loff_t pos = lba * se_dev->dev_attrib.block_size; 49470d3ae5cSAsias He unsigned int len = nolb * se_dev->dev_attrib.block_size; 49570d3ae5cSAsias He int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; 49670d3ae5cSAsias He 49770d3ae5cSAsias He if (!file->f_op->fallocate) 49870d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 49970d3ae5cSAsias He 50070d3ae5cSAsias He ret = file->f_op->fallocate(file, mode, pos, len); 50170d3ae5cSAsias He if (ret < 0) { 50270d3ae5cSAsias He pr_warn("FILEIO: fallocate() failed: %d\n", ret); 50370d3ae5cSAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 50470d3ae5cSAsias He } 50570d3ae5cSAsias He } 50670d3ae5cSAsias He 50743f55bbbSAsias He return 0; 50843f55bbbSAsias He } 50943f55bbbSAsias He 51043f55bbbSAsias He static sense_reason_t 511a82a9538SNicholas Bellinger fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, 512a82a9538SNicholas Bellinger enum dma_data_direction data_direction) 513c66ac9dbSNicholas Bellinger { 514c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 5158287fa5fSSagi Grimberg struct fd_dev *fd_dev = FD_DEV(dev); 5168287fa5fSSagi Grimberg struct file *file = fd_dev->fd_file; 5178287fa5fSSagi Grimberg struct file *pfile = fd_dev->fd_prot_file; 51842201b55SNicholas Bellinger sense_reason_t rc; 519c66ac9dbSNicholas Bellinger int ret = 0; 520046ba642SNicholas Bellinger /* 521046ba642SNicholas Bellinger * We are currently limited by the number of iovecs (2048) per 522046ba642SNicholas Bellinger * single vfs_[writev,readv] call. 523046ba642SNicholas Bellinger */ 524046ba642SNicholas Bellinger if (cmd->data_length > FD_MAX_BYTES) { 525046ba642SNicholas Bellinger pr_err("FILEIO: Not able to process I/O of %u bytes due to" 526291e3e51SColin Ian King "FD_MAX_BYTES: %u iovec count limitation\n", 527046ba642SNicholas Bellinger cmd->data_length, FD_MAX_BYTES); 528046ba642SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 529046ba642SNicholas Bellinger } 530c66ac9dbSNicholas Bellinger /* 531c66ac9dbSNicholas Bellinger * Call vectorized fileio functions to map struct scatterlist 532c66ac9dbSNicholas Bellinger * physical memory addresses to struct iovec virtual memory. 533c66ac9dbSNicholas Bellinger */ 5345787cacdSChristoph Hellwig if (data_direction == DMA_FROM_DEVICE) { 535ee920469SNicholas Bellinger if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5368287fa5fSSagi Grimberg ret = fd_do_rw(cmd, pfile, dev->prot_length, 5378287fa5fSSagi Grimberg cmd->t_prot_sg, cmd->t_prot_nents, 5388287fa5fSSagi Grimberg cmd->prot_length, 0); 53942201b55SNicholas Bellinger if (ret < 0) 54042201b55SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 54142201b55SNicholas Bellinger } 54242201b55SNicholas Bellinger 5438287fa5fSSagi Grimberg ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, 5448287fa5fSSagi Grimberg sgl, sgl_nents, cmd->data_length, 0); 54542201b55SNicholas Bellinger 546ee920469SNicholas Bellinger if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5478287fa5fSSagi Grimberg u32 sectors = cmd->data_length >> 5488287fa5fSSagi Grimberg ilog2(dev->dev_attrib.block_size); 54942201b55SNicholas Bellinger 550f75b6faeSSagi Grimberg rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 551f75b6faeSSagi Grimberg 0, cmd->t_prot_sg, 0); 5528287fa5fSSagi Grimberg if (rc) 55342201b55SNicholas Bellinger return rc; 55442201b55SNicholas Bellinger } 555c66ac9dbSNicholas Bellinger } else { 556ee920469SNicholas Bellinger if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5578287fa5fSSagi Grimberg u32 sectors = cmd->data_length >> 5588287fa5fSSagi Grimberg ilog2(dev->dev_attrib.block_size); 55942201b55SNicholas Bellinger 5608287fa5fSSagi Grimberg rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, 5618287fa5fSSagi Grimberg 0, cmd->t_prot_sg, 0); 5628287fa5fSSagi Grimberg if (rc) 56342201b55SNicholas Bellinger return rc; 56442201b55SNicholas Bellinger } 56542201b55SNicholas Bellinger 5668287fa5fSSagi Grimberg ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, 5678287fa5fSSagi Grimberg sgl, sgl_nents, cmd->data_length, 1); 568a4dff304SNicholas Bellinger /* 569125d0119SHannes Reinecke * Perform implicit vfs_fsync_range() for fd_do_writev() ops 570a4dff304SNicholas Bellinger * for SCSI WRITEs with Forced Unit Access (FUA) set. 571a4dff304SNicholas Bellinger * Allow this to happen independent of WCE=0 setting. 572a4dff304SNicholas Bellinger */ 573814e5b45SChristoph Hellwig if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) { 574a4dff304SNicholas Bellinger loff_t start = cmd->t_task_lba * 5750fd97ccfSChristoph Hellwig dev->dev_attrib.block_size; 57662d3ab49SZach Brown loff_t end; 57762d3ab49SZach Brown 57862d3ab49SZach Brown if (cmd->data_length) 57962d3ab49SZach Brown end = start + cmd->data_length - 1; 58062d3ab49SZach Brown else 58162d3ab49SZach Brown end = LLONG_MAX; 582c66ac9dbSNicholas Bellinger 583a4dff304SNicholas Bellinger vfs_fsync_range(fd_dev->fd_file, start, end, 1); 584a4dff304SNicholas Bellinger } 585c66ac9dbSNicholas Bellinger 586ee920469SNicholas Bellinger if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { 5878287fa5fSSagi Grimberg ret = fd_do_rw(cmd, pfile, dev->prot_length, 5888287fa5fSSagi Grimberg cmd->t_prot_sg, cmd->t_prot_nents, 5898287fa5fSSagi Grimberg cmd->prot_length, 1); 590de103c93SChristoph Hellwig if (ret < 0) 591de103c93SChristoph Hellwig return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 59242201b55SNicholas Bellinger } 59342201b55SNicholas Bellinger } 59442201b55SNicholas Bellinger 5958287fa5fSSagi Grimberg if (ret < 0) 59642201b55SNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 597de103c93SChristoph Hellwig 5985787cacdSChristoph Hellwig if (ret) 5995787cacdSChristoph Hellwig target_complete_cmd(cmd, SAM_STAT_GOOD); 60003e98c9eSNicholas Bellinger return 0; 601c66ac9dbSNicholas Bellinger } 602c66ac9dbSNicholas Bellinger 603c66ac9dbSNicholas Bellinger enum { 604c66ac9dbSNicholas Bellinger Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err 605c66ac9dbSNicholas Bellinger }; 606c66ac9dbSNicholas Bellinger 607c66ac9dbSNicholas Bellinger static match_table_t tokens = { 608c66ac9dbSNicholas Bellinger {Opt_fd_dev_name, "fd_dev_name=%s"}, 609c66ac9dbSNicholas Bellinger {Opt_fd_dev_size, "fd_dev_size=%s"}, 610b32f4c7eSNicholas Bellinger {Opt_fd_buffered_io, "fd_buffered_io=%d"}, 611c66ac9dbSNicholas Bellinger {Opt_err, NULL} 612c66ac9dbSNicholas Bellinger }; 613c66ac9dbSNicholas Bellinger 6140fd97ccfSChristoph Hellwig static ssize_t fd_set_configfs_dev_params(struct se_device *dev, 615c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 616c66ac9dbSNicholas Bellinger { 6170fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 618c66ac9dbSNicholas Bellinger char *orig, *ptr, *arg_p, *opts; 619c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 620b32f4c7eSNicholas Bellinger int ret = 0, arg, token; 621c66ac9dbSNicholas Bellinger 622c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 623c66ac9dbSNicholas Bellinger if (!opts) 624c66ac9dbSNicholas Bellinger return -ENOMEM; 625c66ac9dbSNicholas Bellinger 626c66ac9dbSNicholas Bellinger orig = opts; 627c66ac9dbSNicholas Bellinger 62890c161b6SSebastian Andrzej Siewior while ((ptr = strsep(&opts, ",\n")) != NULL) { 629c66ac9dbSNicholas Bellinger if (!*ptr) 630c66ac9dbSNicholas Bellinger continue; 631c66ac9dbSNicholas Bellinger 632c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 633c66ac9dbSNicholas Bellinger switch (token) { 634c66ac9dbSNicholas Bellinger case Opt_fd_dev_name: 635dbc6e022SAl Viro if (match_strlcpy(fd_dev->fd_dev_name, &args[0], 636dbc6e022SAl Viro FD_MAX_DEV_NAME) == 0) { 637dbc6e022SAl Viro ret = -EINVAL; 6386d180253SJesper Juhl break; 6396d180253SJesper Juhl } 6406708bb27SAndy Grover pr_debug("FILEIO: Referencing Path: %s\n", 641c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name); 642c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_PATH; 643c66ac9dbSNicholas Bellinger break; 644c66ac9dbSNicholas Bellinger case Opt_fd_dev_size: 645c66ac9dbSNicholas Bellinger arg_p = match_strdup(&args[0]); 6466d180253SJesper Juhl if (!arg_p) { 6476d180253SJesper Juhl ret = -ENOMEM; 6486d180253SJesper Juhl break; 6496d180253SJesper Juhl } 65057103d7fSJingoo Han ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); 6516d180253SJesper Juhl kfree(arg_p); 652c66ac9dbSNicholas Bellinger if (ret < 0) { 65357103d7fSJingoo Han pr_err("kstrtoull() failed for" 654c66ac9dbSNicholas Bellinger " fd_dev_size=\n"); 655c66ac9dbSNicholas Bellinger goto out; 656c66ac9dbSNicholas Bellinger } 6576708bb27SAndy Grover pr_debug("FILEIO: Referencing Size: %llu" 658c66ac9dbSNicholas Bellinger " bytes\n", fd_dev->fd_dev_size); 659c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_SIZE; 660c66ac9dbSNicholas Bellinger break; 661b32f4c7eSNicholas Bellinger case Opt_fd_buffered_io: 662ce31c1b0SJoern Engel ret = match_int(args, &arg); 663ce31c1b0SJoern Engel if (ret) 664ce31c1b0SJoern Engel goto out; 665b32f4c7eSNicholas Bellinger if (arg != 1) { 666b32f4c7eSNicholas Bellinger pr_err("bogus fd_buffered_io=%d value\n", arg); 667b32f4c7eSNicholas Bellinger ret = -EINVAL; 668b32f4c7eSNicholas Bellinger goto out; 669b32f4c7eSNicholas Bellinger } 670b32f4c7eSNicholas Bellinger 671b32f4c7eSNicholas Bellinger pr_debug("FILEIO: Using buffered I/O" 672b32f4c7eSNicholas Bellinger " operations for struct fd_dev\n"); 673b32f4c7eSNicholas Bellinger 674b32f4c7eSNicholas Bellinger fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; 675b32f4c7eSNicholas Bellinger break; 676c66ac9dbSNicholas Bellinger default: 677c66ac9dbSNicholas Bellinger break; 678c66ac9dbSNicholas Bellinger } 679c66ac9dbSNicholas Bellinger } 680c66ac9dbSNicholas Bellinger 681c66ac9dbSNicholas Bellinger out: 682c66ac9dbSNicholas Bellinger kfree(orig); 683c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 684c66ac9dbSNicholas Bellinger } 685c66ac9dbSNicholas Bellinger 6860fd97ccfSChristoph Hellwig static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) 687c66ac9dbSNicholas Bellinger { 6880fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 689c66ac9dbSNicholas Bellinger ssize_t bl = 0; 690c66ac9dbSNicholas Bellinger 691c66ac9dbSNicholas Bellinger bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); 692b32f4c7eSNicholas Bellinger bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", 693b32f4c7eSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size, 694b32f4c7eSNicholas Bellinger (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? 695b32f4c7eSNicholas Bellinger "Buffered-WCE" : "O_DSYNC"); 696c66ac9dbSNicholas Bellinger return bl; 697c66ac9dbSNicholas Bellinger } 698c66ac9dbSNicholas Bellinger 699c66ac9dbSNicholas Bellinger static sector_t fd_get_blocks(struct se_device *dev) 700c66ac9dbSNicholas Bellinger { 7010fd97ccfSChristoph Hellwig struct fd_dev *fd_dev = FD_DEV(dev); 702cd9323fdSNicholas Bellinger struct file *f = fd_dev->fd_file; 703cd9323fdSNicholas Bellinger struct inode *i = f->f_mapping->host; 704cd9323fdSNicholas Bellinger unsigned long long dev_size; 705cd9323fdSNicholas Bellinger /* 706cd9323fdSNicholas Bellinger * When using a file that references an underlying struct block_device, 707cd9323fdSNicholas Bellinger * ensure dev_size is always based on the current inode size in order 708cd9323fdSNicholas Bellinger * to handle underlying block_device resize operations. 709cd9323fdSNicholas Bellinger */ 710cd9323fdSNicholas Bellinger if (S_ISBLK(i->i_mode)) 71121363ca8SNicholas Bellinger dev_size = i_size_read(i); 712cd9323fdSNicholas Bellinger else 713cd9323fdSNicholas Bellinger dev_size = fd_dev->fd_dev_size; 714c66ac9dbSNicholas Bellinger 71521363ca8SNicholas Bellinger return div_u64(dev_size - dev->dev_attrib.block_size, 71621363ca8SNicholas Bellinger dev->dev_attrib.block_size); 717c66ac9dbSNicholas Bellinger } 718c66ac9dbSNicholas Bellinger 7190f5e2ec4SNicholas Bellinger static int fd_init_prot(struct se_device *dev) 7200f5e2ec4SNicholas Bellinger { 7210f5e2ec4SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(dev); 7220f5e2ec4SNicholas Bellinger struct file *prot_file, *file = fd_dev->fd_file; 7230f5e2ec4SNicholas Bellinger struct inode *inode; 7240f5e2ec4SNicholas Bellinger int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; 7250f5e2ec4SNicholas Bellinger char buf[FD_MAX_DEV_PROT_NAME]; 7260f5e2ec4SNicholas Bellinger 7270f5e2ec4SNicholas Bellinger if (!file) { 7280f5e2ec4SNicholas Bellinger pr_err("Unable to locate fd_dev->fd_file\n"); 7290f5e2ec4SNicholas Bellinger return -ENODEV; 7300f5e2ec4SNicholas Bellinger } 7310f5e2ec4SNicholas Bellinger 7320f5e2ec4SNicholas Bellinger inode = file->f_mapping->host; 7330f5e2ec4SNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 7340f5e2ec4SNicholas Bellinger pr_err("FILEIO Protection emulation only supported on" 7350f5e2ec4SNicholas Bellinger " !S_ISBLK\n"); 7360f5e2ec4SNicholas Bellinger return -ENOSYS; 7370f5e2ec4SNicholas Bellinger } 7380f5e2ec4SNicholas Bellinger 7390f5e2ec4SNicholas Bellinger if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) 7400f5e2ec4SNicholas Bellinger flags &= ~O_DSYNC; 7410f5e2ec4SNicholas Bellinger 7420f5e2ec4SNicholas Bellinger snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", 7430f5e2ec4SNicholas Bellinger fd_dev->fd_dev_name); 7440f5e2ec4SNicholas Bellinger 7450f5e2ec4SNicholas Bellinger prot_file = filp_open(buf, flags, 0600); 7460f5e2ec4SNicholas Bellinger if (IS_ERR(prot_file)) { 7470f5e2ec4SNicholas Bellinger pr_err("filp_open(%s) failed\n", buf); 7480f5e2ec4SNicholas Bellinger ret = PTR_ERR(prot_file); 7490f5e2ec4SNicholas Bellinger return ret; 7500f5e2ec4SNicholas Bellinger } 7510f5e2ec4SNicholas Bellinger fd_dev->fd_prot_file = prot_file; 7520f5e2ec4SNicholas Bellinger 7530f5e2ec4SNicholas Bellinger return 0; 7540f5e2ec4SNicholas Bellinger } 7550f5e2ec4SNicholas Bellinger 7560f5e2ec4SNicholas Bellinger static int fd_format_prot(struct se_device *dev) 7570f5e2ec4SNicholas Bellinger { 7580f5e2ec4SNicholas Bellinger unsigned char *buf; 7590f5e2ec4SNicholas Bellinger int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; 76064d240b7SAkinobu Mita int ret; 7610f5e2ec4SNicholas Bellinger 7620f5e2ec4SNicholas Bellinger if (!dev->dev_attrib.pi_prot_type) { 7630f5e2ec4SNicholas Bellinger pr_err("Unable to format_prot while pi_prot_type == 0\n"); 7640f5e2ec4SNicholas Bellinger return -ENODEV; 7650f5e2ec4SNicholas Bellinger } 7660f5e2ec4SNicholas Bellinger 7670f5e2ec4SNicholas Bellinger buf = vzalloc(unit_size); 7680f5e2ec4SNicholas Bellinger if (!buf) { 7690f5e2ec4SNicholas Bellinger pr_err("Unable to allocate FILEIO prot buf\n"); 7700f5e2ec4SNicholas Bellinger return -ENOMEM; 7710f5e2ec4SNicholas Bellinger } 7720f5e2ec4SNicholas Bellinger 7730f5e2ec4SNicholas Bellinger pr_debug("Using FILEIO prot_length: %llu\n", 77464d240b7SAkinobu Mita (unsigned long long)(dev->transport->get_blocks(dev) + 1) * 77564d240b7SAkinobu Mita dev->prot_length); 7760f5e2ec4SNicholas Bellinger 77780dcd0c1SSagi Grimberg memset(buf, 0xff, unit_size); 77864d240b7SAkinobu Mita ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, 77964d240b7SAkinobu Mita buf, unit_size); 7800f5e2ec4SNicholas Bellinger vfree(buf); 7810f5e2ec4SNicholas Bellinger return ret; 7820f5e2ec4SNicholas Bellinger } 7830f5e2ec4SNicholas Bellinger 7840f5e2ec4SNicholas Bellinger static void fd_free_prot(struct se_device *dev) 7850f5e2ec4SNicholas Bellinger { 7860f5e2ec4SNicholas Bellinger struct fd_dev *fd_dev = FD_DEV(dev); 7870f5e2ec4SNicholas Bellinger 7880f5e2ec4SNicholas Bellinger if (!fd_dev->fd_prot_file) 7890f5e2ec4SNicholas Bellinger return; 7900f5e2ec4SNicholas Bellinger 7910f5e2ec4SNicholas Bellinger filp_close(fd_dev->fd_prot_file, NULL); 7920f5e2ec4SNicholas Bellinger fd_dev->fd_prot_file = NULL; 7930f5e2ec4SNicholas Bellinger } 7940f5e2ec4SNicholas Bellinger 7959e999a6cSChristoph Hellwig static struct sbc_ops fd_sbc_ops = { 7960c2ad7d1SChristoph Hellwig .execute_rw = fd_execute_rw, 797ad67f0d9SChristoph Hellwig .execute_sync_cache = fd_execute_sync_cache, 7987b745c84SNicholas Bellinger .execute_write_same = fd_execute_write_same, 79950642762SAsias He .execute_unmap = fd_execute_unmap, 8000c2ad7d1SChristoph Hellwig }; 8010c2ad7d1SChristoph Hellwig 802de103c93SChristoph Hellwig static sense_reason_t 803de103c93SChristoph Hellwig fd_parse_cdb(struct se_cmd *cmd) 8040c2ad7d1SChristoph Hellwig { 8059e999a6cSChristoph Hellwig return sbc_parse_cdb(cmd, &fd_sbc_ops); 8060c2ad7d1SChristoph Hellwig } 8070c2ad7d1SChristoph Hellwig 8080a06d430SChristoph Hellwig static const struct target_backend_ops fileio_ops = { 809c66ac9dbSNicholas Bellinger .name = "fileio", 8100fd97ccfSChristoph Hellwig .inquiry_prod = "FILEIO", 8110fd97ccfSChristoph Hellwig .inquiry_rev = FD_VERSION, 812c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 813c66ac9dbSNicholas Bellinger .attach_hba = fd_attach_hba, 814c66ac9dbSNicholas Bellinger .detach_hba = fd_detach_hba, 8150fd97ccfSChristoph Hellwig .alloc_device = fd_alloc_device, 8160fd97ccfSChristoph Hellwig .configure_device = fd_configure_device, 817c66ac9dbSNicholas Bellinger .free_device = fd_free_device, 8180c2ad7d1SChristoph Hellwig .parse_cdb = fd_parse_cdb, 819c66ac9dbSNicholas Bellinger .set_configfs_dev_params = fd_set_configfs_dev_params, 820c66ac9dbSNicholas Bellinger .show_configfs_dev_params = fd_show_configfs_dev_params, 8216f23ac8aSChristoph Hellwig .get_device_type = sbc_get_device_type, 822c66ac9dbSNicholas Bellinger .get_blocks = fd_get_blocks, 8230f5e2ec4SNicholas Bellinger .init_prot = fd_init_prot, 8240f5e2ec4SNicholas Bellinger .format_prot = fd_format_prot, 8250f5e2ec4SNicholas Bellinger .free_prot = fd_free_prot, 8265873c4d1SChristoph Hellwig .tb_dev_attrib_attrs = sbc_attrib_attrs, 827c66ac9dbSNicholas Bellinger }; 828c66ac9dbSNicholas Bellinger 829c66ac9dbSNicholas Bellinger static int __init fileio_module_init(void) 830c66ac9dbSNicholas Bellinger { 8310a06d430SChristoph Hellwig return transport_backend_register(&fileio_ops); 832c66ac9dbSNicholas Bellinger } 833c66ac9dbSNicholas Bellinger 83463b91d5aSAsias He static void __exit fileio_module_exit(void) 835c66ac9dbSNicholas Bellinger { 8360a06d430SChristoph Hellwig target_backend_unregister(&fileio_ops); 837c66ac9dbSNicholas Bellinger } 838c66ac9dbSNicholas Bellinger 839c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); 840c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 841c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 842c66ac9dbSNicholas Bellinger 843c66ac9dbSNicholas Bellinger module_init(fileio_module_init); 844c66ac9dbSNicholas Bellinger module_exit(fileio_module_exit); 845