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 * 6c66ac9dbSNicholas Bellinger * Copyright (c) 2005 PyX Technologies, Inc. 7c66ac9dbSNicholas Bellinger * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. 8c66ac9dbSNicholas Bellinger * Copyright (c) 2007-2010 Rising Tide Systems 9c66ac9dbSNicholas Bellinger * Copyright (c) 2008-2010 Linux-iSCSI.org 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 12c66ac9dbSNicholas Bellinger * 13c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 14c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 15c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 16c66ac9dbSNicholas Bellinger * (at your option) any later version. 17c66ac9dbSNicholas Bellinger * 18c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 19c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 20c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 22c66ac9dbSNicholas Bellinger * 23c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 24c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 25c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 26c66ac9dbSNicholas Bellinger * 27c66ac9dbSNicholas Bellinger ******************************************************************************/ 28c66ac9dbSNicholas Bellinger 29c66ac9dbSNicholas Bellinger #include <linux/version.h> 30c66ac9dbSNicholas Bellinger #include <linux/string.h> 31c66ac9dbSNicholas Bellinger #include <linux/parser.h> 32c66ac9dbSNicholas Bellinger #include <linux/timer.h> 33c66ac9dbSNicholas Bellinger #include <linux/blkdev.h> 34c66ac9dbSNicholas Bellinger #include <linux/slab.h> 35c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 36c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 37c66ac9dbSNicholas Bellinger #include <scsi/scsi_host.h> 38c66ac9dbSNicholas Bellinger 39c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 40c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 41c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger #include "target_core_file.h" 44c66ac9dbSNicholas Bellinger 45c66ac9dbSNicholas Bellinger #if 1 46c66ac9dbSNicholas Bellinger #define DEBUG_FD_CACHE(x...) printk(x) 47c66ac9dbSNicholas Bellinger #else 48c66ac9dbSNicholas Bellinger #define DEBUG_FD_CACHE(x...) 49c66ac9dbSNicholas Bellinger #endif 50c66ac9dbSNicholas Bellinger 51c66ac9dbSNicholas Bellinger #if 1 52c66ac9dbSNicholas Bellinger #define DEBUG_FD_FUA(x...) printk(x) 53c66ac9dbSNicholas Bellinger #else 54c66ac9dbSNicholas Bellinger #define DEBUG_FD_FUA(x...) 55c66ac9dbSNicholas Bellinger #endif 56c66ac9dbSNicholas Bellinger 57c66ac9dbSNicholas Bellinger static struct se_subsystem_api fileio_template; 58c66ac9dbSNicholas Bellinger 59c66ac9dbSNicholas Bellinger /* fd_attach_hba(): (Part of se_subsystem_api_t template) 60c66ac9dbSNicholas Bellinger * 61c66ac9dbSNicholas Bellinger * 62c66ac9dbSNicholas Bellinger */ 63c66ac9dbSNicholas Bellinger static int fd_attach_hba(struct se_hba *hba, u32 host_id) 64c66ac9dbSNicholas Bellinger { 65c66ac9dbSNicholas Bellinger struct fd_host *fd_host; 66c66ac9dbSNicholas Bellinger 67c66ac9dbSNicholas Bellinger fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); 68c66ac9dbSNicholas Bellinger if (!(fd_host)) { 69c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for struct fd_host\n"); 70c66ac9dbSNicholas Bellinger return -1; 71c66ac9dbSNicholas Bellinger } 72c66ac9dbSNicholas Bellinger 73c66ac9dbSNicholas Bellinger fd_host->fd_host_id = host_id; 74c66ac9dbSNicholas Bellinger 75c66ac9dbSNicholas Bellinger atomic_set(&hba->left_queue_depth, FD_HBA_QUEUE_DEPTH); 76c66ac9dbSNicholas Bellinger atomic_set(&hba->max_queue_depth, FD_HBA_QUEUE_DEPTH); 77c66ac9dbSNicholas Bellinger hba->hba_ptr = (void *) fd_host; 78c66ac9dbSNicholas Bellinger 79c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" 80c66ac9dbSNicholas Bellinger " Target Core Stack %s\n", hba->hba_id, FD_VERSION, 81c66ac9dbSNicholas Bellinger TARGET_CORE_MOD_VERSION); 82c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic" 83c66ac9dbSNicholas Bellinger " Target Core with TCQ Depth: %d MaxSectors: %u\n", 84c66ac9dbSNicholas Bellinger hba->hba_id, fd_host->fd_host_id, 85c66ac9dbSNicholas Bellinger atomic_read(&hba->max_queue_depth), FD_MAX_SECTORS); 86c66ac9dbSNicholas Bellinger 87c66ac9dbSNicholas Bellinger return 0; 88c66ac9dbSNicholas Bellinger } 89c66ac9dbSNicholas Bellinger 90c66ac9dbSNicholas Bellinger static void fd_detach_hba(struct se_hba *hba) 91c66ac9dbSNicholas Bellinger { 92c66ac9dbSNicholas Bellinger struct fd_host *fd_host = hba->hba_ptr; 93c66ac9dbSNicholas Bellinger 94c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" 95c66ac9dbSNicholas Bellinger " Target Core\n", hba->hba_id, fd_host->fd_host_id); 96c66ac9dbSNicholas Bellinger 97c66ac9dbSNicholas Bellinger kfree(fd_host); 98c66ac9dbSNicholas Bellinger hba->hba_ptr = NULL; 99c66ac9dbSNicholas Bellinger } 100c66ac9dbSNicholas Bellinger 101c66ac9dbSNicholas Bellinger static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name) 102c66ac9dbSNicholas Bellinger { 103c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev; 104c66ac9dbSNicholas Bellinger struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr; 105c66ac9dbSNicholas Bellinger 106c66ac9dbSNicholas Bellinger fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); 107c66ac9dbSNicholas Bellinger if (!(fd_dev)) { 108c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate memory for struct fd_dev\n"); 109c66ac9dbSNicholas Bellinger return NULL; 110c66ac9dbSNicholas Bellinger } 111c66ac9dbSNicholas Bellinger 112c66ac9dbSNicholas Bellinger fd_dev->fd_host = fd_host; 113c66ac9dbSNicholas Bellinger 114c66ac9dbSNicholas Bellinger printk(KERN_INFO "FILEIO: Allocated fd_dev for %p\n", name); 115c66ac9dbSNicholas Bellinger 116c66ac9dbSNicholas Bellinger return fd_dev; 117c66ac9dbSNicholas Bellinger } 118c66ac9dbSNicholas Bellinger 119c66ac9dbSNicholas Bellinger /* fd_create_virtdevice(): (Part of se_subsystem_api_t template) 120c66ac9dbSNicholas Bellinger * 121c66ac9dbSNicholas Bellinger * 122c66ac9dbSNicholas Bellinger */ 123c66ac9dbSNicholas Bellinger static struct se_device *fd_create_virtdevice( 124c66ac9dbSNicholas Bellinger struct se_hba *hba, 125c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 126c66ac9dbSNicholas Bellinger void *p) 127c66ac9dbSNicholas Bellinger { 128c66ac9dbSNicholas Bellinger char *dev_p = NULL; 129c66ac9dbSNicholas Bellinger struct se_device *dev; 130c66ac9dbSNicholas Bellinger struct se_dev_limits dev_limits; 131c66ac9dbSNicholas Bellinger struct queue_limits *limits; 132c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = (struct fd_dev *) p; 133c66ac9dbSNicholas Bellinger struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr; 134c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 135c66ac9dbSNicholas Bellinger struct file *file; 136c66ac9dbSNicholas Bellinger struct inode *inode = NULL; 137c66ac9dbSNicholas Bellinger int dev_flags = 0, flags; 138c66ac9dbSNicholas Bellinger 139c66ac9dbSNicholas Bellinger memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 140c66ac9dbSNicholas Bellinger 141c66ac9dbSNicholas Bellinger old_fs = get_fs(); 142c66ac9dbSNicholas Bellinger set_fs(get_ds()); 143c66ac9dbSNicholas Bellinger dev_p = getname(fd_dev->fd_dev_name); 144c66ac9dbSNicholas Bellinger set_fs(old_fs); 145c66ac9dbSNicholas Bellinger 146c66ac9dbSNicholas Bellinger if (IS_ERR(dev_p)) { 147c66ac9dbSNicholas Bellinger printk(KERN_ERR "getname(%s) failed: %lu\n", 148c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name, IS_ERR(dev_p)); 149c66ac9dbSNicholas Bellinger goto fail; 150c66ac9dbSNicholas Bellinger } 151c66ac9dbSNicholas Bellinger #if 0 152c66ac9dbSNicholas Bellinger if (di->no_create_file) 153c66ac9dbSNicholas Bellinger flags = O_RDWR | O_LARGEFILE; 154c66ac9dbSNicholas Bellinger else 155c66ac9dbSNicholas Bellinger flags = O_RDWR | O_CREAT | O_LARGEFILE; 156c66ac9dbSNicholas Bellinger #else 157c66ac9dbSNicholas Bellinger flags = O_RDWR | O_CREAT | O_LARGEFILE; 158c66ac9dbSNicholas Bellinger #endif 159c66ac9dbSNicholas Bellinger /* flags |= O_DIRECT; */ 160c66ac9dbSNicholas Bellinger /* 161c66ac9dbSNicholas Bellinger * If fd_buffered_io=1 has not been set explictly (the default), 162c66ac9dbSNicholas Bellinger * use O_SYNC to force FILEIO writes to disk. 163c66ac9dbSNicholas Bellinger */ 164c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO)) 165c66ac9dbSNicholas Bellinger flags |= O_SYNC; 166c66ac9dbSNicholas Bellinger 167c66ac9dbSNicholas Bellinger file = filp_open(dev_p, flags, 0600); 168c66ac9dbSNicholas Bellinger 169c66ac9dbSNicholas Bellinger if (IS_ERR(file) || !file || !file->f_dentry) { 170c66ac9dbSNicholas Bellinger printk(KERN_ERR "filp_open(%s) failed\n", dev_p); 171c66ac9dbSNicholas Bellinger goto fail; 172c66ac9dbSNicholas Bellinger } 173c66ac9dbSNicholas Bellinger fd_dev->fd_file = file; 174c66ac9dbSNicholas Bellinger /* 175c66ac9dbSNicholas Bellinger * If using a block backend with this struct file, we extract 176c66ac9dbSNicholas Bellinger * fd_dev->fd_[block,dev]_size from struct block_device. 177c66ac9dbSNicholas Bellinger * 178c66ac9dbSNicholas Bellinger * Otherwise, we use the passed fd_size= from configfs 179c66ac9dbSNicholas Bellinger */ 180c66ac9dbSNicholas Bellinger inode = file->f_mapping->host; 181c66ac9dbSNicholas Bellinger if (S_ISBLK(inode->i_mode)) { 182c66ac9dbSNicholas Bellinger struct request_queue *q; 183c66ac9dbSNicholas Bellinger /* 184c66ac9dbSNicholas Bellinger * Setup the local scope queue_limits from struct request_queue->limits 185c66ac9dbSNicholas Bellinger * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. 186c66ac9dbSNicholas Bellinger */ 187c66ac9dbSNicholas Bellinger q = bdev_get_queue(inode->i_bdev); 188c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 189c66ac9dbSNicholas Bellinger limits->logical_block_size = bdev_logical_block_size(inode->i_bdev); 190c66ac9dbSNicholas Bellinger limits->max_hw_sectors = queue_max_hw_sectors(q); 191c66ac9dbSNicholas Bellinger limits->max_sectors = queue_max_sectors(q); 192c66ac9dbSNicholas Bellinger /* 193c66ac9dbSNicholas Bellinger * Determine the number of bytes from i_size_read() minus 194c66ac9dbSNicholas Bellinger * one (1) logical sector from underlying struct block_device 195c66ac9dbSNicholas Bellinger */ 196c66ac9dbSNicholas Bellinger fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); 197c66ac9dbSNicholas Bellinger fd_dev->fd_dev_size = (i_size_read(file->f_mapping->host) - 198c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 199c66ac9dbSNicholas Bellinger 200c66ac9dbSNicholas Bellinger printk(KERN_INFO "FILEIO: Using size: %llu bytes from struct" 201c66ac9dbSNicholas Bellinger " block_device blocks: %llu logical_block_size: %d\n", 202c66ac9dbSNicholas Bellinger fd_dev->fd_dev_size, 203c66ac9dbSNicholas Bellinger div_u64(fd_dev->fd_dev_size, fd_dev->fd_block_size), 204c66ac9dbSNicholas Bellinger fd_dev->fd_block_size); 205c66ac9dbSNicholas Bellinger } else { 206c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { 207c66ac9dbSNicholas Bellinger printk(KERN_ERR "FILEIO: Missing fd_dev_size=" 208c66ac9dbSNicholas Bellinger " parameter, and no backing struct" 209c66ac9dbSNicholas Bellinger " block_device\n"); 210c66ac9dbSNicholas Bellinger goto fail; 211c66ac9dbSNicholas Bellinger } 212c66ac9dbSNicholas Bellinger 213c66ac9dbSNicholas Bellinger limits = &dev_limits.limits; 214c66ac9dbSNicholas Bellinger limits->logical_block_size = FD_BLOCKSIZE; 215c66ac9dbSNicholas Bellinger limits->max_hw_sectors = FD_MAX_SECTORS; 216c66ac9dbSNicholas Bellinger limits->max_sectors = FD_MAX_SECTORS; 217c66ac9dbSNicholas Bellinger fd_dev->fd_block_size = FD_BLOCKSIZE; 218c66ac9dbSNicholas Bellinger } 219c66ac9dbSNicholas Bellinger 220c66ac9dbSNicholas Bellinger dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; 221c66ac9dbSNicholas Bellinger dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH; 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger dev = transport_add_device_to_core_hba(hba, &fileio_template, 224c66ac9dbSNicholas Bellinger se_dev, dev_flags, (void *)fd_dev, 225c66ac9dbSNicholas Bellinger &dev_limits, "FILEIO", FD_VERSION); 226c66ac9dbSNicholas Bellinger if (!(dev)) 227c66ac9dbSNicholas Bellinger goto fail; 228c66ac9dbSNicholas Bellinger 229c66ac9dbSNicholas Bellinger fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; 230c66ac9dbSNicholas Bellinger fd_dev->fd_queue_depth = dev->queue_depth; 231c66ac9dbSNicholas Bellinger 232c66ac9dbSNicholas Bellinger printk(KERN_INFO "CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," 233c66ac9dbSNicholas Bellinger " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, 234c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size); 235c66ac9dbSNicholas Bellinger 236c66ac9dbSNicholas Bellinger putname(dev_p); 237c66ac9dbSNicholas Bellinger return dev; 238c66ac9dbSNicholas Bellinger fail: 239c66ac9dbSNicholas Bellinger if (fd_dev->fd_file) { 240c66ac9dbSNicholas Bellinger filp_close(fd_dev->fd_file, NULL); 241c66ac9dbSNicholas Bellinger fd_dev->fd_file = NULL; 242c66ac9dbSNicholas Bellinger } 243c66ac9dbSNicholas Bellinger putname(dev_p); 244c66ac9dbSNicholas Bellinger return NULL; 245c66ac9dbSNicholas Bellinger } 246c66ac9dbSNicholas Bellinger 247c66ac9dbSNicholas Bellinger /* fd_free_device(): (Part of se_subsystem_api_t template) 248c66ac9dbSNicholas Bellinger * 249c66ac9dbSNicholas Bellinger * 250c66ac9dbSNicholas Bellinger */ 251c66ac9dbSNicholas Bellinger static void fd_free_device(void *p) 252c66ac9dbSNicholas Bellinger { 253c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = (struct fd_dev *) p; 254c66ac9dbSNicholas Bellinger 255c66ac9dbSNicholas Bellinger if (fd_dev->fd_file) { 256c66ac9dbSNicholas Bellinger filp_close(fd_dev->fd_file, NULL); 257c66ac9dbSNicholas Bellinger fd_dev->fd_file = NULL; 258c66ac9dbSNicholas Bellinger } 259c66ac9dbSNicholas Bellinger 260c66ac9dbSNicholas Bellinger kfree(fd_dev); 261c66ac9dbSNicholas Bellinger } 262c66ac9dbSNicholas Bellinger 263c66ac9dbSNicholas Bellinger static inline struct fd_request *FILE_REQ(struct se_task *task) 264c66ac9dbSNicholas Bellinger { 265c66ac9dbSNicholas Bellinger return container_of(task, struct fd_request, fd_task); 266c66ac9dbSNicholas Bellinger } 267c66ac9dbSNicholas Bellinger 268c66ac9dbSNicholas Bellinger 269c66ac9dbSNicholas Bellinger static struct se_task * 270c66ac9dbSNicholas Bellinger fd_alloc_task(struct se_cmd *cmd) 271c66ac9dbSNicholas Bellinger { 272c66ac9dbSNicholas Bellinger struct fd_request *fd_req; 273c66ac9dbSNicholas Bellinger 274c66ac9dbSNicholas Bellinger fd_req = kzalloc(sizeof(struct fd_request), GFP_KERNEL); 275c66ac9dbSNicholas Bellinger if (!(fd_req)) { 276c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct fd_request\n"); 277c66ac9dbSNicholas Bellinger return NULL; 278c66ac9dbSNicholas Bellinger } 279c66ac9dbSNicholas Bellinger 280c66ac9dbSNicholas Bellinger fd_req->fd_dev = SE_DEV(cmd)->dev_ptr; 281c66ac9dbSNicholas Bellinger 282c66ac9dbSNicholas Bellinger return &fd_req->fd_task; 283c66ac9dbSNicholas Bellinger } 284c66ac9dbSNicholas Bellinger 285c66ac9dbSNicholas Bellinger static int fd_do_readv(struct se_task *task) 286c66ac9dbSNicholas Bellinger { 287c66ac9dbSNicholas Bellinger struct fd_request *req = FILE_REQ(task); 288c66ac9dbSNicholas Bellinger struct file *fd = req->fd_dev->fd_file; 289c66ac9dbSNicholas Bellinger struct scatterlist *sg = task->task_sg; 290c66ac9dbSNicholas Bellinger struct iovec *iov; 291c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 292c66ac9dbSNicholas Bellinger loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size); 293c66ac9dbSNicholas Bellinger int ret = 0, i; 294c66ac9dbSNicholas Bellinger 295c66ac9dbSNicholas Bellinger iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL); 296c66ac9dbSNicholas Bellinger if (!(iov)) { 297c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate fd_do_readv iov[]\n"); 298c66ac9dbSNicholas Bellinger return -1; 299c66ac9dbSNicholas Bellinger } 300c66ac9dbSNicholas Bellinger 301c66ac9dbSNicholas Bellinger for (i = 0; i < task->task_sg_num; i++) { 302c66ac9dbSNicholas Bellinger iov[i].iov_len = sg[i].length; 303c66ac9dbSNicholas Bellinger iov[i].iov_base = sg_virt(&sg[i]); 304c66ac9dbSNicholas Bellinger } 305c66ac9dbSNicholas Bellinger 306c66ac9dbSNicholas Bellinger old_fs = get_fs(); 307c66ac9dbSNicholas Bellinger set_fs(get_ds()); 308c66ac9dbSNicholas Bellinger ret = vfs_readv(fd, &iov[0], task->task_sg_num, &pos); 309c66ac9dbSNicholas Bellinger set_fs(old_fs); 310c66ac9dbSNicholas Bellinger 311c66ac9dbSNicholas Bellinger kfree(iov); 312c66ac9dbSNicholas Bellinger /* 313c66ac9dbSNicholas Bellinger * Return zeros and GOOD status even if the READ did not return 314c66ac9dbSNicholas Bellinger * the expected virt_size for struct file w/o a backing struct 315c66ac9dbSNicholas Bellinger * block_device. 316c66ac9dbSNicholas Bellinger */ 317c66ac9dbSNicholas Bellinger if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) { 318c66ac9dbSNicholas Bellinger if (ret < 0 || ret != task->task_size) { 319c66ac9dbSNicholas Bellinger printk(KERN_ERR "vfs_readv() returned %d," 320c66ac9dbSNicholas Bellinger " expecting %d for S_ISBLK\n", ret, 321c66ac9dbSNicholas Bellinger (int)task->task_size); 322c66ac9dbSNicholas Bellinger return -1; 323c66ac9dbSNicholas Bellinger } 324c66ac9dbSNicholas Bellinger } else { 325c66ac9dbSNicholas Bellinger if (ret < 0) { 326c66ac9dbSNicholas Bellinger printk(KERN_ERR "vfs_readv() returned %d for non" 327c66ac9dbSNicholas Bellinger " S_ISBLK\n", ret); 328c66ac9dbSNicholas Bellinger return -1; 329c66ac9dbSNicholas Bellinger } 330c66ac9dbSNicholas Bellinger } 331c66ac9dbSNicholas Bellinger 332c66ac9dbSNicholas Bellinger return 1; 333c66ac9dbSNicholas Bellinger } 334c66ac9dbSNicholas Bellinger 335c66ac9dbSNicholas Bellinger static int fd_do_writev(struct se_task *task) 336c66ac9dbSNicholas Bellinger { 337c66ac9dbSNicholas Bellinger struct fd_request *req = FILE_REQ(task); 338c66ac9dbSNicholas Bellinger struct file *fd = req->fd_dev->fd_file; 339c66ac9dbSNicholas Bellinger struct scatterlist *sg = task->task_sg; 340c66ac9dbSNicholas Bellinger struct iovec *iov; 341c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 342c66ac9dbSNicholas Bellinger loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size); 343c66ac9dbSNicholas Bellinger int ret, i = 0; 344c66ac9dbSNicholas Bellinger 345c66ac9dbSNicholas Bellinger iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL); 346c66ac9dbSNicholas Bellinger if (!(iov)) { 347c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate fd_do_writev iov[]\n"); 348c66ac9dbSNicholas Bellinger return -1; 349c66ac9dbSNicholas Bellinger } 350c66ac9dbSNicholas Bellinger 351c66ac9dbSNicholas Bellinger for (i = 0; i < task->task_sg_num; i++) { 352c66ac9dbSNicholas Bellinger iov[i].iov_len = sg[i].length; 353c66ac9dbSNicholas Bellinger iov[i].iov_base = sg_virt(&sg[i]); 354c66ac9dbSNicholas Bellinger } 355c66ac9dbSNicholas Bellinger 356c66ac9dbSNicholas Bellinger old_fs = get_fs(); 357c66ac9dbSNicholas Bellinger set_fs(get_ds()); 358c66ac9dbSNicholas Bellinger ret = vfs_writev(fd, &iov[0], task->task_sg_num, &pos); 359c66ac9dbSNicholas Bellinger set_fs(old_fs); 360c66ac9dbSNicholas Bellinger 361c66ac9dbSNicholas Bellinger kfree(iov); 362c66ac9dbSNicholas Bellinger 363c66ac9dbSNicholas Bellinger if (ret < 0 || ret != task->task_size) { 364c66ac9dbSNicholas Bellinger printk(KERN_ERR "vfs_writev() returned %d\n", ret); 365c66ac9dbSNicholas Bellinger return -1; 366c66ac9dbSNicholas Bellinger } 367c66ac9dbSNicholas Bellinger 368c66ac9dbSNicholas Bellinger return 1; 369c66ac9dbSNicholas Bellinger } 370c66ac9dbSNicholas Bellinger 371c66ac9dbSNicholas Bellinger static void fd_emulate_sync_cache(struct se_task *task) 372c66ac9dbSNicholas Bellinger { 373c66ac9dbSNicholas Bellinger struct se_cmd *cmd = TASK_CMD(task); 374c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 375c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = dev->dev_ptr; 376c66ac9dbSNicholas Bellinger int immed = (cmd->t_task->t_task_cdb[1] & 0x2); 377c66ac9dbSNicholas Bellinger loff_t start, end; 378c66ac9dbSNicholas Bellinger int ret; 379c66ac9dbSNicholas Bellinger 380c66ac9dbSNicholas Bellinger /* 381c66ac9dbSNicholas Bellinger * If the Immediate bit is set, queue up the GOOD response 382c66ac9dbSNicholas Bellinger * for this SYNCHRONIZE_CACHE op 383c66ac9dbSNicholas Bellinger */ 384c66ac9dbSNicholas Bellinger if (immed) 385c66ac9dbSNicholas Bellinger transport_complete_sync_cache(cmd, 1); 386c66ac9dbSNicholas Bellinger 387c66ac9dbSNicholas Bellinger /* 388c66ac9dbSNicholas Bellinger * Determine if we will be flushing the entire device. 389c66ac9dbSNicholas Bellinger */ 390c66ac9dbSNicholas Bellinger if (cmd->t_task->t_task_lba == 0 && cmd->data_length == 0) { 391c66ac9dbSNicholas Bellinger start = 0; 392c66ac9dbSNicholas Bellinger end = LLONG_MAX; 393c66ac9dbSNicholas Bellinger } else { 394c66ac9dbSNicholas Bellinger start = cmd->t_task->t_task_lba * DEV_ATTRIB(dev)->block_size; 395c66ac9dbSNicholas Bellinger if (cmd->data_length) 396c66ac9dbSNicholas Bellinger end = start + cmd->data_length; 397c66ac9dbSNicholas Bellinger else 398c66ac9dbSNicholas Bellinger end = LLONG_MAX; 399c66ac9dbSNicholas Bellinger } 400c66ac9dbSNicholas Bellinger 401c66ac9dbSNicholas Bellinger ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); 402c66ac9dbSNicholas Bellinger if (ret != 0) 403c66ac9dbSNicholas Bellinger printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret); 404c66ac9dbSNicholas Bellinger 405c66ac9dbSNicholas Bellinger if (!immed) 406c66ac9dbSNicholas Bellinger transport_complete_sync_cache(cmd, ret == 0); 407c66ac9dbSNicholas Bellinger } 408c66ac9dbSNicholas Bellinger 409c66ac9dbSNicholas Bellinger /* 410c66ac9dbSNicholas Bellinger * Tell TCM Core that we are capable of WriteCache emulation for 411c66ac9dbSNicholas Bellinger * an underlying struct se_device. 412c66ac9dbSNicholas Bellinger */ 413c66ac9dbSNicholas Bellinger static int fd_emulated_write_cache(struct se_device *dev) 414c66ac9dbSNicholas Bellinger { 415c66ac9dbSNicholas Bellinger return 1; 416c66ac9dbSNicholas Bellinger } 417c66ac9dbSNicholas Bellinger 418c66ac9dbSNicholas Bellinger static int fd_emulated_dpo(struct se_device *dev) 419c66ac9dbSNicholas Bellinger { 420c66ac9dbSNicholas Bellinger return 0; 421c66ac9dbSNicholas Bellinger } 422c66ac9dbSNicholas Bellinger /* 423c66ac9dbSNicholas Bellinger * Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs 424c66ac9dbSNicholas Bellinger * for TYPE_DISK. 425c66ac9dbSNicholas Bellinger */ 426c66ac9dbSNicholas Bellinger static int fd_emulated_fua_write(struct se_device *dev) 427c66ac9dbSNicholas Bellinger { 428c66ac9dbSNicholas Bellinger return 1; 429c66ac9dbSNicholas Bellinger } 430c66ac9dbSNicholas Bellinger 431c66ac9dbSNicholas Bellinger static int fd_emulated_fua_read(struct se_device *dev) 432c66ac9dbSNicholas Bellinger { 433c66ac9dbSNicholas Bellinger return 0; 434c66ac9dbSNicholas Bellinger } 435c66ac9dbSNicholas Bellinger 436c66ac9dbSNicholas Bellinger /* 437c66ac9dbSNicholas Bellinger * WRITE Force Unit Access (FUA) emulation on a per struct se_task 438c66ac9dbSNicholas Bellinger * LBA range basis.. 439c66ac9dbSNicholas Bellinger */ 440c66ac9dbSNicholas Bellinger static void fd_emulate_write_fua(struct se_cmd *cmd, struct se_task *task) 441c66ac9dbSNicholas Bellinger { 442c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 443c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = dev->dev_ptr; 444c66ac9dbSNicholas Bellinger loff_t start = task->task_lba * DEV_ATTRIB(dev)->block_size; 445c66ac9dbSNicholas Bellinger loff_t end = start + task->task_size; 446c66ac9dbSNicholas Bellinger int ret; 447c66ac9dbSNicholas Bellinger 448c66ac9dbSNicholas Bellinger DEBUG_FD_CACHE("FILEIO: FUA WRITE LBA: %llu, bytes: %u\n", 449c66ac9dbSNicholas Bellinger task->task_lba, task->task_size); 450c66ac9dbSNicholas Bellinger 451c66ac9dbSNicholas Bellinger ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); 452c66ac9dbSNicholas Bellinger if (ret != 0) 453c66ac9dbSNicholas Bellinger printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret); 454c66ac9dbSNicholas Bellinger } 455c66ac9dbSNicholas Bellinger 456c66ac9dbSNicholas Bellinger static int fd_do_task(struct se_task *task) 457c66ac9dbSNicholas Bellinger { 458c66ac9dbSNicholas Bellinger struct se_cmd *cmd = task->task_se_cmd; 459c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 460c66ac9dbSNicholas Bellinger int ret = 0; 461c66ac9dbSNicholas Bellinger 462c66ac9dbSNicholas Bellinger /* 463c66ac9dbSNicholas Bellinger * Call vectorized fileio functions to map struct scatterlist 464c66ac9dbSNicholas Bellinger * physical memory addresses to struct iovec virtual memory. 465c66ac9dbSNicholas Bellinger */ 466c66ac9dbSNicholas Bellinger if (task->task_data_direction == DMA_FROM_DEVICE) { 467c66ac9dbSNicholas Bellinger ret = fd_do_readv(task); 468c66ac9dbSNicholas Bellinger } else { 469c66ac9dbSNicholas Bellinger ret = fd_do_writev(task); 470c66ac9dbSNicholas Bellinger 471c66ac9dbSNicholas Bellinger if (ret > 0 && 472c66ac9dbSNicholas Bellinger DEV_ATTRIB(dev)->emulate_write_cache > 0 && 473c66ac9dbSNicholas Bellinger DEV_ATTRIB(dev)->emulate_fua_write > 0 && 474c66ac9dbSNicholas Bellinger T_TASK(cmd)->t_tasks_fua) { 475c66ac9dbSNicholas Bellinger /* 476c66ac9dbSNicholas Bellinger * We might need to be a bit smarter here 477c66ac9dbSNicholas Bellinger * and return some sense data to let the initiator 478c66ac9dbSNicholas Bellinger * know the FUA WRITE cache sync failed..? 479c66ac9dbSNicholas Bellinger */ 480c66ac9dbSNicholas Bellinger fd_emulate_write_fua(cmd, task); 481c66ac9dbSNicholas Bellinger } 482c66ac9dbSNicholas Bellinger 483c66ac9dbSNicholas Bellinger } 484c66ac9dbSNicholas Bellinger 485c66ac9dbSNicholas Bellinger if (ret < 0) 486c66ac9dbSNicholas Bellinger return ret; 487c66ac9dbSNicholas Bellinger if (ret) { 488c66ac9dbSNicholas Bellinger task->task_scsi_status = GOOD; 489c66ac9dbSNicholas Bellinger transport_complete_task(task, 1); 490c66ac9dbSNicholas Bellinger } 491c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 492c66ac9dbSNicholas Bellinger } 493c66ac9dbSNicholas Bellinger 494c66ac9dbSNicholas Bellinger /* fd_free_task(): (Part of se_subsystem_api_t template) 495c66ac9dbSNicholas Bellinger * 496c66ac9dbSNicholas Bellinger * 497c66ac9dbSNicholas Bellinger */ 498c66ac9dbSNicholas Bellinger static void fd_free_task(struct se_task *task) 499c66ac9dbSNicholas Bellinger { 500c66ac9dbSNicholas Bellinger struct fd_request *req = FILE_REQ(task); 501c66ac9dbSNicholas Bellinger 502c66ac9dbSNicholas Bellinger kfree(req); 503c66ac9dbSNicholas Bellinger } 504c66ac9dbSNicholas Bellinger 505c66ac9dbSNicholas Bellinger enum { 506c66ac9dbSNicholas Bellinger Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err 507c66ac9dbSNicholas Bellinger }; 508c66ac9dbSNicholas Bellinger 509c66ac9dbSNicholas Bellinger static match_table_t tokens = { 510c66ac9dbSNicholas Bellinger {Opt_fd_dev_name, "fd_dev_name=%s"}, 511c66ac9dbSNicholas Bellinger {Opt_fd_dev_size, "fd_dev_size=%s"}, 512c66ac9dbSNicholas Bellinger {Opt_fd_buffered_io, "fd_buffered_id=%d"}, 513c66ac9dbSNicholas Bellinger {Opt_err, NULL} 514c66ac9dbSNicholas Bellinger }; 515c66ac9dbSNicholas Bellinger 516c66ac9dbSNicholas Bellinger static ssize_t fd_set_configfs_dev_params( 517c66ac9dbSNicholas Bellinger struct se_hba *hba, 518c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 519c66ac9dbSNicholas Bellinger const char *page, ssize_t count) 520c66ac9dbSNicholas Bellinger { 521c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = se_dev->se_dev_su_ptr; 522c66ac9dbSNicholas Bellinger char *orig, *ptr, *arg_p, *opts; 523c66ac9dbSNicholas Bellinger substring_t args[MAX_OPT_ARGS]; 524c66ac9dbSNicholas Bellinger int ret = 0, arg, token; 525c66ac9dbSNicholas Bellinger 526c66ac9dbSNicholas Bellinger opts = kstrdup(page, GFP_KERNEL); 527c66ac9dbSNicholas Bellinger if (!opts) 528c66ac9dbSNicholas Bellinger return -ENOMEM; 529c66ac9dbSNicholas Bellinger 530c66ac9dbSNicholas Bellinger orig = opts; 531c66ac9dbSNicholas Bellinger 532c66ac9dbSNicholas Bellinger while ((ptr = strsep(&opts, ",")) != NULL) { 533c66ac9dbSNicholas Bellinger if (!*ptr) 534c66ac9dbSNicholas Bellinger continue; 535c66ac9dbSNicholas Bellinger 536c66ac9dbSNicholas Bellinger token = match_token(ptr, tokens, args); 537c66ac9dbSNicholas Bellinger switch (token) { 538c66ac9dbSNicholas Bellinger case Opt_fd_dev_name: 5396d180253SJesper Juhl arg_p = match_strdup(&args[0]); 5406d180253SJesper Juhl if (!arg_p) { 5416d180253SJesper Juhl ret = -ENOMEM; 5426d180253SJesper Juhl break; 5436d180253SJesper Juhl } 544c66ac9dbSNicholas Bellinger snprintf(fd_dev->fd_dev_name, FD_MAX_DEV_NAME, 5456d180253SJesper Juhl "%s", arg_p); 5466d180253SJesper Juhl kfree(arg_p); 547c66ac9dbSNicholas Bellinger printk(KERN_INFO "FILEIO: Referencing Path: %s\n", 548c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name); 549c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_PATH; 550c66ac9dbSNicholas Bellinger break; 551c66ac9dbSNicholas Bellinger case Opt_fd_dev_size: 552c66ac9dbSNicholas Bellinger arg_p = match_strdup(&args[0]); 5536d180253SJesper Juhl if (!arg_p) { 5546d180253SJesper Juhl ret = -ENOMEM; 5556d180253SJesper Juhl break; 5566d180253SJesper Juhl } 557c66ac9dbSNicholas Bellinger ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size); 5586d180253SJesper Juhl kfree(arg_p); 559c66ac9dbSNicholas Bellinger if (ret < 0) { 560c66ac9dbSNicholas Bellinger printk(KERN_ERR "strict_strtoull() failed for" 561c66ac9dbSNicholas Bellinger " fd_dev_size=\n"); 562c66ac9dbSNicholas Bellinger goto out; 563c66ac9dbSNicholas Bellinger } 564c66ac9dbSNicholas Bellinger printk(KERN_INFO "FILEIO: Referencing Size: %llu" 565c66ac9dbSNicholas Bellinger " bytes\n", fd_dev->fd_dev_size); 566c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FBDF_HAS_SIZE; 567c66ac9dbSNicholas Bellinger break; 568c66ac9dbSNicholas Bellinger case Opt_fd_buffered_io: 569c66ac9dbSNicholas Bellinger match_int(args, &arg); 570c66ac9dbSNicholas Bellinger if (arg != 1) { 571c66ac9dbSNicholas Bellinger printk(KERN_ERR "bogus fd_buffered_io=%d value\n", arg); 572c66ac9dbSNicholas Bellinger ret = -EINVAL; 573c66ac9dbSNicholas Bellinger goto out; 574c66ac9dbSNicholas Bellinger } 575c66ac9dbSNicholas Bellinger 576c66ac9dbSNicholas Bellinger printk(KERN_INFO "FILEIO: Using buffered I/O" 577c66ac9dbSNicholas Bellinger " operations for struct fd_dev\n"); 578c66ac9dbSNicholas Bellinger 579c66ac9dbSNicholas Bellinger fd_dev->fbd_flags |= FDBD_USE_BUFFERED_IO; 580c66ac9dbSNicholas Bellinger break; 581c66ac9dbSNicholas Bellinger default: 582c66ac9dbSNicholas Bellinger break; 583c66ac9dbSNicholas Bellinger } 584c66ac9dbSNicholas Bellinger } 585c66ac9dbSNicholas Bellinger 586c66ac9dbSNicholas Bellinger out: 587c66ac9dbSNicholas Bellinger kfree(orig); 588c66ac9dbSNicholas Bellinger return (!ret) ? count : ret; 589c66ac9dbSNicholas Bellinger } 590c66ac9dbSNicholas Bellinger 591c66ac9dbSNicholas Bellinger static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev) 592c66ac9dbSNicholas Bellinger { 593c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = (struct fd_dev *) se_dev->se_dev_su_ptr; 594c66ac9dbSNicholas Bellinger 595c66ac9dbSNicholas Bellinger if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { 596c66ac9dbSNicholas Bellinger printk(KERN_ERR "Missing fd_dev_name=\n"); 597c66ac9dbSNicholas Bellinger return -1; 598c66ac9dbSNicholas Bellinger } 599c66ac9dbSNicholas Bellinger 600c66ac9dbSNicholas Bellinger return 0; 601c66ac9dbSNicholas Bellinger } 602c66ac9dbSNicholas Bellinger 603c66ac9dbSNicholas Bellinger static ssize_t fd_show_configfs_dev_params( 604c66ac9dbSNicholas Bellinger struct se_hba *hba, 605c66ac9dbSNicholas Bellinger struct se_subsystem_dev *se_dev, 606c66ac9dbSNicholas Bellinger char *b) 607c66ac9dbSNicholas Bellinger { 608c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = se_dev->se_dev_su_ptr; 609c66ac9dbSNicholas Bellinger ssize_t bl = 0; 610c66ac9dbSNicholas Bellinger 611c66ac9dbSNicholas Bellinger bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); 612c66ac9dbSNicholas Bellinger bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", 613c66ac9dbSNicholas Bellinger fd_dev->fd_dev_name, fd_dev->fd_dev_size, 614c66ac9dbSNicholas Bellinger (fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO) ? 615c66ac9dbSNicholas Bellinger "Buffered" : "Synchronous"); 616c66ac9dbSNicholas Bellinger return bl; 617c66ac9dbSNicholas Bellinger } 618c66ac9dbSNicholas Bellinger 619c66ac9dbSNicholas Bellinger /* fd_get_cdb(): (Part of se_subsystem_api_t template) 620c66ac9dbSNicholas Bellinger * 621c66ac9dbSNicholas Bellinger * 622c66ac9dbSNicholas Bellinger */ 623c66ac9dbSNicholas Bellinger static unsigned char *fd_get_cdb(struct se_task *task) 624c66ac9dbSNicholas Bellinger { 625c66ac9dbSNicholas Bellinger struct fd_request *req = FILE_REQ(task); 626c66ac9dbSNicholas Bellinger 627c66ac9dbSNicholas Bellinger return req->fd_scsi_cdb; 628c66ac9dbSNicholas Bellinger } 629c66ac9dbSNicholas Bellinger 630c66ac9dbSNicholas Bellinger /* fd_get_device_rev(): (Part of se_subsystem_api_t template) 631c66ac9dbSNicholas Bellinger * 632c66ac9dbSNicholas Bellinger * 633c66ac9dbSNicholas Bellinger */ 634c66ac9dbSNicholas Bellinger static u32 fd_get_device_rev(struct se_device *dev) 635c66ac9dbSNicholas Bellinger { 636c66ac9dbSNicholas Bellinger return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ 637c66ac9dbSNicholas Bellinger } 638c66ac9dbSNicholas Bellinger 639c66ac9dbSNicholas Bellinger /* fd_get_device_type(): (Part of se_subsystem_api_t template) 640c66ac9dbSNicholas Bellinger * 641c66ac9dbSNicholas Bellinger * 642c66ac9dbSNicholas Bellinger */ 643c66ac9dbSNicholas Bellinger static u32 fd_get_device_type(struct se_device *dev) 644c66ac9dbSNicholas Bellinger { 645c66ac9dbSNicholas Bellinger return TYPE_DISK; 646c66ac9dbSNicholas Bellinger } 647c66ac9dbSNicholas Bellinger 648c66ac9dbSNicholas Bellinger static sector_t fd_get_blocks(struct se_device *dev) 649c66ac9dbSNicholas Bellinger { 650c66ac9dbSNicholas Bellinger struct fd_dev *fd_dev = dev->dev_ptr; 651c66ac9dbSNicholas Bellinger unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size, 652c66ac9dbSNicholas Bellinger DEV_ATTRIB(dev)->block_size); 653c66ac9dbSNicholas Bellinger 654c66ac9dbSNicholas Bellinger return blocks_long; 655c66ac9dbSNicholas Bellinger } 656c66ac9dbSNicholas Bellinger 657c66ac9dbSNicholas Bellinger static struct se_subsystem_api fileio_template = { 658c66ac9dbSNicholas Bellinger .name = "fileio", 659c66ac9dbSNicholas Bellinger .owner = THIS_MODULE, 660c66ac9dbSNicholas Bellinger .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, 661c66ac9dbSNicholas Bellinger .attach_hba = fd_attach_hba, 662c66ac9dbSNicholas Bellinger .detach_hba = fd_detach_hba, 663c66ac9dbSNicholas Bellinger .allocate_virtdevice = fd_allocate_virtdevice, 664c66ac9dbSNicholas Bellinger .create_virtdevice = fd_create_virtdevice, 665c66ac9dbSNicholas Bellinger .free_device = fd_free_device, 666c66ac9dbSNicholas Bellinger .dpo_emulated = fd_emulated_dpo, 667c66ac9dbSNicholas Bellinger .fua_write_emulated = fd_emulated_fua_write, 668c66ac9dbSNicholas Bellinger .fua_read_emulated = fd_emulated_fua_read, 669c66ac9dbSNicholas Bellinger .write_cache_emulated = fd_emulated_write_cache, 670c66ac9dbSNicholas Bellinger .alloc_task = fd_alloc_task, 671c66ac9dbSNicholas Bellinger .do_task = fd_do_task, 672c66ac9dbSNicholas Bellinger .do_sync_cache = fd_emulate_sync_cache, 673c66ac9dbSNicholas Bellinger .free_task = fd_free_task, 674c66ac9dbSNicholas Bellinger .check_configfs_dev_params = fd_check_configfs_dev_params, 675c66ac9dbSNicholas Bellinger .set_configfs_dev_params = fd_set_configfs_dev_params, 676c66ac9dbSNicholas Bellinger .show_configfs_dev_params = fd_show_configfs_dev_params, 677c66ac9dbSNicholas Bellinger .get_cdb = fd_get_cdb, 678c66ac9dbSNicholas Bellinger .get_device_rev = fd_get_device_rev, 679c66ac9dbSNicholas Bellinger .get_device_type = fd_get_device_type, 680c66ac9dbSNicholas Bellinger .get_blocks = fd_get_blocks, 681c66ac9dbSNicholas Bellinger }; 682c66ac9dbSNicholas Bellinger 683c66ac9dbSNicholas Bellinger static int __init fileio_module_init(void) 684c66ac9dbSNicholas Bellinger { 685c66ac9dbSNicholas Bellinger return transport_subsystem_register(&fileio_template); 686c66ac9dbSNicholas Bellinger } 687c66ac9dbSNicholas Bellinger 688c66ac9dbSNicholas Bellinger static void fileio_module_exit(void) 689c66ac9dbSNicholas Bellinger { 690c66ac9dbSNicholas Bellinger transport_subsystem_release(&fileio_template); 691c66ac9dbSNicholas Bellinger } 692c66ac9dbSNicholas Bellinger 693c66ac9dbSNicholas Bellinger MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); 694c66ac9dbSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 695c66ac9dbSNicholas Bellinger MODULE_LICENSE("GPL"); 696c66ac9dbSNicholas Bellinger 697c66ac9dbSNicholas Bellinger module_init(fileio_module_init); 698c66ac9dbSNicholas Bellinger module_exit(fileio_module_exit); 699