Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_file.c |
| 3 | * |
| 4 | * This file contains the Storage Engine <-> FILEIO transport specific functions |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2005-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | * |
| 24 | ******************************************************************************/ |
| 25 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 26 | #include <linux/string.h> |
| 27 | #include <linux/parser.h> |
| 28 | #include <linux/timer.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/spinlock.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 32 | #include <linux/module.h> |
David S. Miller | 5538d29 | 2015-05-28 11:35:41 -0700 | [diff] [blame] | 33 | #include <linux/vmalloc.h> |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 34 | #include <linux/falloc.h> |
Bart Van Assche | 8dcf07b | 2016-11-14 15:47:14 -0800 | [diff] [blame] | 35 | #include <linux/uio.h> |
Bart Van Assche | ba92999 | 2015-05-08 10:11:12 +0200 | [diff] [blame] | 36 | #include <scsi/scsi_proto.h> |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 37 | #include <asm/unaligned.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 38 | |
| 39 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 40 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | |
| 42 | #include "target_core_file.h" |
| 43 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 44 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
| 45 | { |
| 46 | return container_of(dev, struct fd_dev, dev); |
| 47 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 48 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
| 50 | { |
| 51 | struct fd_host *fd_host; |
| 52 | |
| 53 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 54 | if (!fd_host) { |
| 55 | pr_err("Unable to allocate memory for struct fd_host\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 56 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | fd_host->fd_host_id = host_id; |
| 60 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 61 | hba->hba_ptr = fd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 62 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 63 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 64 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
Christoph Hellwig | ce8dd25 | 2015-06-19 15:14:39 +0200 | [diff] [blame] | 65 | TARGET_CORE_VERSION); |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 66 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
| 67 | hba->hba_id, fd_host->fd_host_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static void fd_detach_hba(struct se_hba *hba) |
| 73 | { |
| 74 | struct fd_host *fd_host = hba->hba_ptr; |
| 75 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 76 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 77 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
| 78 | |
| 79 | kfree(fd_host); |
| 80 | hba->hba_ptr = NULL; |
| 81 | } |
| 82 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 83 | static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | { |
| 85 | struct fd_dev *fd_dev; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 86 | struct fd_host *fd_host = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 87 | |
| 88 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 89 | if (!fd_dev) { |
| 90 | pr_err("Unable to allocate memory for struct fd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | fd_dev->fd_host = fd_host; |
| 95 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 96 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 98 | return &fd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 99 | } |
| 100 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 101 | static int fd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 103 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 104 | struct fd_host *fd_host = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | struct file *file; |
| 106 | struct inode *inode = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 107 | int flags, ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 108 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 109 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
| 110 | pr_err("Missing fd_dev_name=\n"); |
| 111 | return -EINVAL; |
| 112 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 113 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 114 | /* |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 115 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
| 116 | * of pure timestamp updates. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 117 | */ |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 118 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 119 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 120 | /* |
| 121 | * Optionally allow fd_buffered_io=1 to be enabled for people |
| 122 | * who want use the fs buffer cache as an WriteCache mechanism. |
| 123 | * |
| 124 | * This means that in event of a hard failure, there is a risk |
| 125 | * of silent data-loss if the SCSI client has *not* performed a |
| 126 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE |
| 127 | * to write-out the entire device cache. |
| 128 | */ |
| 129 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 130 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); |
| 131 | flags &= ~O_DSYNC; |
| 132 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 133 | |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 134 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 135 | if (IS_ERR(file)) { |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 136 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 137 | ret = PTR_ERR(file); |
| 138 | goto fail; |
| 139 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 140 | fd_dev->fd_file = file; |
| 141 | /* |
| 142 | * If using a block backend with this struct file, we extract |
| 143 | * fd_dev->fd_[block,dev]_size from struct block_device. |
| 144 | * |
| 145 | * Otherwise, we use the passed fd_size= from configfs |
| 146 | */ |
| 147 | inode = file->f_mapping->host; |
| 148 | if (S_ISBLK(inode->i_mode)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 149 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 150 | unsigned long long dev_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 151 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 152 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | /* |
| 154 | * Determine the number of bytes from i_size_read() minus |
| 155 | * one (1) logical sector from underlying struct block_device |
| 156 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 157 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 158 | fd_dev->fd_block_size); |
| 159 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 160 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 161 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 162 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | fd_dev->fd_block_size); |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 164 | |
Mike Christie | ea263c7 | 2016-06-02 20:12:37 -0500 | [diff] [blame] | 165 | if (target_configure_unmap_from_queue(&dev->dev_attrib, q)) |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 166 | pr_debug("IFILE: BLOCK Discard support available," |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 167 | " disabled by default\n"); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 168 | /* |
| 169 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 170 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 171 | */ |
| 172 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Asias He | 0463a3f | 2013-04-24 19:38:11 -0700 | [diff] [blame] | 173 | |
| 174 | if (blk_queue_nonrot(q)) |
| 175 | dev->dev_attrib.is_nonrot = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 176 | } else { |
| 177 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 178 | pr_err("FILEIO: Missing fd_dev_size=" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 179 | " parameter, and no backing struct" |
| 180 | " block_device\n"); |
| 181 | goto fail; |
| 182 | } |
| 183 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 184 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 185 | /* |
| 186 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 187 | */ |
| 188 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 189 | /* |
| 190 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 191 | */ |
| 192 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 193 | dev->dev_attrib.unmap_granularity = 1; |
| 194 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 195 | |
| 196 | /* |
| 197 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 198 | * based upon struct iovec limit for vfs_writev() |
| 199 | */ |
| 200 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | } |
| 202 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 203 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 204 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
| 205 | dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 206 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 207 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 208 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 209 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" |
| 210 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 211 | dev->dev_attrib.emulate_write_cache = 1; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 212 | } |
| 213 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 214 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
| 215 | fd_dev->fd_queue_depth = dev->queue_depth; |
| 216 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 217 | pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 218 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
| 219 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); |
| 220 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 221 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | fail: |
| 223 | if (fd_dev->fd_file) { |
| 224 | filp_close(fd_dev->fd_file, NULL); |
| 225 | fd_dev->fd_file = NULL; |
| 226 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 227 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 228 | } |
| 229 | |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 230 | static void fd_dev_call_rcu(struct rcu_head *p) |
| 231 | { |
| 232 | struct se_device *dev = container_of(p, struct se_device, rcu_head); |
| 233 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 234 | |
| 235 | kfree(fd_dev); |
| 236 | } |
| 237 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 238 | static void fd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 239 | { |
Mike Christie | 9263470 | 2017-06-23 01:18:12 -0500 | [diff] [blame] | 240 | call_rcu(&dev->rcu_head, fd_dev_call_rcu); |
| 241 | } |
| 242 | |
| 243 | static void fd_destroy_device(struct se_device *dev) |
| 244 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 245 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 246 | |
| 247 | if (fd_dev->fd_file) { |
| 248 | filp_close(fd_dev->fd_file, NULL); |
| 249 | fd_dev->fd_file = NULL; |
| 250 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 251 | } |
| 252 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 253 | static int fd_do_rw(struct se_cmd *cmd, struct file *fd, |
| 254 | u32 block_size, struct scatterlist *sgl, |
| 255 | u32 sgl_nents, u32 data_length, int is_write) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 256 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 257 | struct scatterlist *sg; |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 258 | struct iov_iter iter; |
| 259 | struct bio_vec *bvec; |
| 260 | ssize_t len = 0; |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 261 | loff_t pos = (cmd->t_task_lba * block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 262 | int ret = 0, i; |
| 263 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 264 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
| 265 | if (!bvec) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 266 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 267 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 268 | } |
| 269 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 270 | for_each_sg(sgl, sg, sgl_nents, i) { |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 271 | bvec[i].bv_page = sg_page(sg); |
| 272 | bvec[i].bv_len = sg->length; |
| 273 | bvec[i].bv_offset = sg->offset; |
| 274 | |
| 275 | len += sg->length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 276 | } |
| 277 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 278 | iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 279 | if (is_write) |
Christoph Hellwig | abbb6589 | 2017-05-27 11:16:52 +0300 | [diff] [blame] | 280 | ret = vfs_iter_write(fd, &iter, &pos, 0); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 281 | else |
Christoph Hellwig | 18e9710 | 2017-05-27 11:16:51 +0300 | [diff] [blame] | 282 | ret = vfs_iter_read(fd, &iter, &pos, 0); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 283 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 284 | if (is_write) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 285 | if (ret < 0 || ret != data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 286 | pr_err("%s() write returned %d\n", __func__, ret); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 287 | if (ret >= 0) |
| 288 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 289 | } |
| 290 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 291 | /* |
| 292 | * Return zeros and GOOD status even if the READ did not return |
| 293 | * the expected virt_size for struct file w/o a backing struct |
| 294 | * block_device. |
| 295 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 296 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 297 | if (ret < 0 || ret != data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 298 | pr_err("%s() returned %d, expecting %u for " |
| 299 | "S_ISBLK\n", __func__, ret, |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 300 | data_length); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 301 | if (ret >= 0) |
| 302 | ret = -EINVAL; |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 303 | } |
| 304 | } else { |
| 305 | if (ret < 0) { |
| 306 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 307 | __func__, ret); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 308 | } else if (ret != data_length) { |
| 309 | /* |
| 310 | * Short read case: |
| 311 | * Probably some one truncate file under us. |
| 312 | * We must explicitly zero sg-pages to prevent |
| 313 | * expose uninizialized pages to userspace. |
| 314 | */ |
| 315 | if (ret < data_length) |
| 316 | ret += iov_iter_zero(data_length - ret, &iter); |
| 317 | else |
| 318 | ret = -EINVAL; |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 319 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 320 | } |
| 321 | } |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 322 | kfree(bvec); |
| 323 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 324 | } |
| 325 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 326 | static sense_reason_t |
| 327 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 328 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 329 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 330 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 331 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 332 | loff_t start, end; |
| 333 | int ret; |
| 334 | |
| 335 | /* |
| 336 | * If the Immediate bit is set, queue up the GOOD response |
| 337 | * for this SYNCHRONIZE_CACHE op |
| 338 | */ |
| 339 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 340 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 341 | |
| 342 | /* |
| 343 | * Determine if we will be flushing the entire device. |
| 344 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 345 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 346 | start = 0; |
| 347 | end = LLONG_MAX; |
| 348 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 349 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 350 | if (cmd->data_length) |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 351 | end = start + cmd->data_length - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 352 | else |
| 353 | end = LLONG_MAX; |
| 354 | } |
| 355 | |
| 356 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 357 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 358 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 359 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 360 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 361 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 362 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 363 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 364 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 365 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 366 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 367 | |
| 368 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 369 | } |
| 370 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 371 | static sense_reason_t |
| 372 | fd_execute_write_same(struct se_cmd *cmd) |
| 373 | { |
| 374 | struct se_device *se_dev = cmd->se_dev; |
| 375 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 376 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 377 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 378 | struct iov_iter iter; |
| 379 | struct bio_vec *bvec; |
| 380 | unsigned int len = 0, i; |
| 381 | ssize_t ret; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 382 | |
| 383 | if (!nolb) { |
| 384 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 385 | return 0; |
| 386 | } |
Nicholas Bellinger | afd73f1 | 2015-02-14 01:32:11 +0000 | [diff] [blame] | 387 | if (cmd->prot_op) { |
| 388 | pr_err("WRITE_SAME: Protection information with FILEIO" |
| 389 | " backends not supported\n"); |
| 390 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 391 | } |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 392 | |
| 393 | if (cmd->t_data_nents > 1 || |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 394 | cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 395 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 396 | " block_size: %u\n", |
| 397 | cmd->t_data_nents, |
| 398 | cmd->t_data_sg[0].length, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 399 | cmd->se_dev->dev_attrib.block_size); |
| 400 | return TCM_INVALID_CDB_FIELD; |
| 401 | } |
| 402 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 403 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
| 404 | if (!bvec) |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 405 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 406 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 407 | for (i = 0; i < nolb; i++) { |
| 408 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); |
| 409 | bvec[i].bv_len = cmd->t_data_sg[0].length; |
| 410 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; |
| 411 | |
| 412 | len += se_dev->dev_attrib.block_size; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 413 | } |
| 414 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 415 | iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); |
Christoph Hellwig | abbb6589 | 2017-05-27 11:16:52 +0300 | [diff] [blame] | 416 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 417 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 418 | kfree(bvec); |
| 419 | if (ret < 0 || ret != len) { |
| 420 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 421 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 422 | } |
| 423 | |
| 424 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 425 | return 0; |
| 426 | } |
| 427 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 428 | static int |
| 429 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, |
| 430 | void *buf, size_t bufsize) |
| 431 | { |
| 432 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 433 | struct file *prot_fd = fd_dev->fd_prot_file; |
| 434 | sector_t prot_length, prot; |
| 435 | loff_t pos = lba * se_dev->prot_length; |
| 436 | |
| 437 | if (!prot_fd) { |
| 438 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); |
| 439 | return -ENODEV; |
| 440 | } |
| 441 | |
| 442 | prot_length = nolb * se_dev->prot_length; |
| 443 | |
| 444 | for (prot = 0; prot < prot_length;) { |
| 445 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); |
Christoph Hellwig | e13ec93 | 2017-09-01 17:39:14 +0200 | [diff] [blame] | 446 | ssize_t ret = kernel_write(prot_fd, buf, len, &pos); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 447 | |
| 448 | if (ret != len) { |
| 449 | pr_err("vfs_write to prot file failed: %zd\n", ret); |
| 450 | return ret < 0 ? ret : -ENODEV; |
| 451 | } |
| 452 | prot += ret; |
| 453 | } |
| 454 | |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static int |
| 459 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
| 460 | { |
| 461 | void *buf; |
| 462 | int rc; |
| 463 | |
| 464 | buf = (void *)__get_free_page(GFP_KERNEL); |
| 465 | if (!buf) { |
| 466 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 467 | return -ENOMEM; |
| 468 | } |
| 469 | memset(buf, 0xff, PAGE_SIZE); |
| 470 | |
| 471 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); |
| 472 | |
| 473 | free_page((unsigned long)buf); |
| 474 | |
| 475 | return rc; |
| 476 | } |
| 477 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 478 | static sense_reason_t |
Christoph Hellwig | 62e4694 | 2015-06-19 15:10:59 +0200 | [diff] [blame] | 479 | fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 480 | { |
Christoph Hellwig | 62e4694 | 2015-06-19 15:10:59 +0200 | [diff] [blame] | 481 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 482 | struct inode *inode = file->f_mapping->host; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 483 | int ret; |
| 484 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 485 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
| 486 | ret = fd_do_prot_unmap(cmd, lba, nolb); |
| 487 | if (ret) |
| 488 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 489 | } |
| 490 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 491 | if (S_ISBLK(inode->i_mode)) { |
| 492 | /* The backend is block device, use discard */ |
| 493 | struct block_device *bdev = inode->i_bdev; |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 494 | struct se_device *dev = cmd->se_dev; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 495 | |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 496 | ret = blkdev_issue_discard(bdev, |
| 497 | target_to_linux_sector(dev, lba), |
| 498 | target_to_linux_sector(dev, nolb), |
| 499 | GFP_KERNEL, 0); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 500 | if (ret < 0) { |
| 501 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 502 | ret); |
| 503 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 504 | } |
| 505 | } else { |
| 506 | /* The backend is normal file, use fallocate */ |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 507 | struct se_device *se_dev = cmd->se_dev; |
| 508 | loff_t pos = lba * se_dev->dev_attrib.block_size; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 509 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 510 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 511 | |
| 512 | if (!file->f_op->fallocate) |
| 513 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 514 | |
| 515 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 516 | if (ret < 0) { |
| 517 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 518 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 519 | } |
| 520 | } |
| 521 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | static sense_reason_t |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 526 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 527 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 528 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 529 | struct se_device *dev = cmd->se_dev; |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 530 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 531 | struct file *file = fd_dev->fd_file; |
| 532 | struct file *pfile = fd_dev->fd_prot_file; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 533 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 534 | int ret = 0; |
Nicholas Bellinger | 046ba64 | 2015-01-06 16:10:37 -0800 | [diff] [blame] | 535 | /* |
| 536 | * We are currently limited by the number of iovecs (2048) per |
| 537 | * single vfs_[writev,readv] call. |
| 538 | */ |
| 539 | if (cmd->data_length > FD_MAX_BYTES) { |
| 540 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" |
Colin Ian King | 291e3e5 | 2016-06-22 19:31:51 +0100 | [diff] [blame] | 541 | "FD_MAX_BYTES: %u iovec count limitation\n", |
Nicholas Bellinger | 046ba64 | 2015-01-06 16:10:37 -0800 | [diff] [blame] | 542 | cmd->data_length, FD_MAX_BYTES); |
| 543 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 544 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 545 | /* |
| 546 | * Call vectorized fileio functions to map struct scatterlist |
| 547 | * physical memory addresses to struct iovec virtual memory. |
| 548 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 549 | if (data_direction == DMA_FROM_DEVICE) { |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 550 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 551 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
| 552 | cmd->t_prot_sg, cmd->t_prot_nents, |
| 553 | cmd->prot_length, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 554 | if (ret < 0) |
| 555 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 556 | } |
| 557 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 558 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
| 559 | sgl, sgl_nents, cmd->data_length, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 560 | |
Dmitry Monakhov | 056e892 | 2017-03-31 19:53:36 +0400 | [diff] [blame] | 561 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type && |
| 562 | dev->dev_attrib.pi_prot_verify) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 563 | u32 sectors = cmd->data_length >> |
| 564 | ilog2(dev->dev_attrib.block_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 565 | |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 566 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
| 567 | 0, cmd->t_prot_sg, 0); |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 568 | if (rc) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 569 | return rc; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 570 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 571 | } else { |
Dmitry Monakhov | 056e892 | 2017-03-31 19:53:36 +0400 | [diff] [blame] | 572 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type && |
| 573 | dev->dev_attrib.pi_prot_verify) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 574 | u32 sectors = cmd->data_length >> |
| 575 | ilog2(dev->dev_attrib.block_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 576 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 577 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
| 578 | 0, cmd->t_prot_sg, 0); |
| 579 | if (rc) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 580 | return rc; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 581 | } |
| 582 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 583 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
| 584 | sgl, sgl_nents, cmd->data_length, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 585 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 586 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 587 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 588 | * Allow this to happen independent of WCE=0 setting. |
| 589 | */ |
Christoph Hellwig | 814e5b4 | 2015-04-20 15:00:30 +0200 | [diff] [blame] | 590 | if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) { |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 591 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 592 | dev->dev_attrib.block_size; |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 593 | loff_t end; |
| 594 | |
| 595 | if (cmd->data_length) |
| 596 | end = start + cmd->data_length - 1; |
| 597 | else |
| 598 | end = LLONG_MAX; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 599 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 600 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 601 | } |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 602 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 603 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 604 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
| 605 | cmd->t_prot_sg, cmd->t_prot_nents, |
| 606 | cmd->prot_length, 1); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 607 | if (ret < 0) |
| 608 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 609 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 610 | } |
| 611 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 612 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 613 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 614 | |
Bart Van Assche | 59ac9c0 | 2017-05-04 15:50:47 -0700 | [diff] [blame] | 615 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 616 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 617 | } |
| 618 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 619 | enum { |
| 620 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err |
| 621 | }; |
| 622 | |
| 623 | static match_table_t tokens = { |
| 624 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 625 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 626 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 627 | {Opt_err, NULL} |
| 628 | }; |
| 629 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 630 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 631 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 632 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 633 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 634 | char *orig, *ptr, *arg_p, *opts; |
| 635 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 636 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 637 | |
| 638 | opts = kstrdup(page, GFP_KERNEL); |
| 639 | if (!opts) |
| 640 | return -ENOMEM; |
| 641 | |
| 642 | orig = opts; |
| 643 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 644 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 645 | if (!*ptr) |
| 646 | continue; |
| 647 | |
| 648 | token = match_token(ptr, tokens, args); |
| 649 | switch (token) { |
| 650 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 651 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 652 | FD_MAX_DEV_NAME) == 0) { |
| 653 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 654 | break; |
| 655 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 656 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 657 | fd_dev->fd_dev_name); |
| 658 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 659 | break; |
| 660 | case Opt_fd_dev_size: |
| 661 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 662 | if (!arg_p) { |
| 663 | ret = -ENOMEM; |
| 664 | break; |
| 665 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 666 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 667 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 668 | if (ret < 0) { |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 669 | pr_err("kstrtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 670 | " fd_dev_size=\n"); |
| 671 | goto out; |
| 672 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 673 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 674 | " bytes\n", fd_dev->fd_dev_size); |
| 675 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 676 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 677 | case Opt_fd_buffered_io: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 678 | ret = match_int(args, &arg); |
| 679 | if (ret) |
| 680 | goto out; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 681 | if (arg != 1) { |
| 682 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 683 | ret = -EINVAL; |
| 684 | goto out; |
| 685 | } |
| 686 | |
| 687 | pr_debug("FILEIO: Using buffered I/O" |
| 688 | " operations for struct fd_dev\n"); |
| 689 | |
| 690 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 691 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 692 | default: |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | out: |
| 698 | kfree(orig); |
| 699 | return (!ret) ? count : ret; |
| 700 | } |
| 701 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 702 | static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 703 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 704 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 705 | ssize_t bl = 0; |
| 706 | |
| 707 | bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 708 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
| 709 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 710 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
| 711 | "Buffered-WCE" : "O_DSYNC"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 712 | return bl; |
| 713 | } |
| 714 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 715 | static sector_t fd_get_blocks(struct se_device *dev) |
| 716 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 717 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 718 | struct file *f = fd_dev->fd_file; |
| 719 | struct inode *i = f->f_mapping->host; |
| 720 | unsigned long long dev_size; |
| 721 | /* |
| 722 | * When using a file that references an underlying struct block_device, |
| 723 | * ensure dev_size is always based on the current inode size in order |
| 724 | * to handle underlying block_device resize operations. |
| 725 | */ |
| 726 | if (S_ISBLK(i->i_mode)) |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 727 | dev_size = i_size_read(i); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 728 | else |
| 729 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 730 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 731 | return div_u64(dev_size - dev->dev_attrib.block_size, |
| 732 | dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 733 | } |
| 734 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 735 | static int fd_init_prot(struct se_device *dev) |
| 736 | { |
| 737 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 738 | struct file *prot_file, *file = fd_dev->fd_file; |
| 739 | struct inode *inode; |
| 740 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
| 741 | char buf[FD_MAX_DEV_PROT_NAME]; |
| 742 | |
| 743 | if (!file) { |
| 744 | pr_err("Unable to locate fd_dev->fd_file\n"); |
| 745 | return -ENODEV; |
| 746 | } |
| 747 | |
| 748 | inode = file->f_mapping->host; |
| 749 | if (S_ISBLK(inode->i_mode)) { |
| 750 | pr_err("FILEIO Protection emulation only supported on" |
| 751 | " !S_ISBLK\n"); |
| 752 | return -ENOSYS; |
| 753 | } |
| 754 | |
| 755 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) |
| 756 | flags &= ~O_DSYNC; |
| 757 | |
| 758 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", |
| 759 | fd_dev->fd_dev_name); |
| 760 | |
| 761 | prot_file = filp_open(buf, flags, 0600); |
| 762 | if (IS_ERR(prot_file)) { |
| 763 | pr_err("filp_open(%s) failed\n", buf); |
| 764 | ret = PTR_ERR(prot_file); |
| 765 | return ret; |
| 766 | } |
| 767 | fd_dev->fd_prot_file = prot_file; |
| 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 772 | static int fd_format_prot(struct se_device *dev) |
| 773 | { |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 774 | unsigned char *buf; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 775 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 776 | int ret; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 777 | |
| 778 | if (!dev->dev_attrib.pi_prot_type) { |
| 779 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); |
| 780 | return -ENODEV; |
| 781 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 782 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 783 | buf = vzalloc(unit_size); |
| 784 | if (!buf) { |
| 785 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 786 | return -ENOMEM; |
| 787 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 788 | |
| 789 | pr_debug("Using FILEIO prot_length: %llu\n", |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 790 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
| 791 | dev->prot_length); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 792 | |
Sagi Grimberg | 80dcd0c | 2014-02-19 17:50:16 +0200 | [diff] [blame] | 793 | memset(buf, 0xff, unit_size); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 794 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
| 795 | buf, unit_size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 796 | vfree(buf); |
| 797 | return ret; |
| 798 | } |
| 799 | |
| 800 | static void fd_free_prot(struct se_device *dev) |
| 801 | { |
| 802 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 803 | |
| 804 | if (!fd_dev->fd_prot_file) |
| 805 | return; |
| 806 | |
| 807 | filp_close(fd_dev->fd_prot_file, NULL); |
| 808 | fd_dev->fd_prot_file = NULL; |
| 809 | } |
| 810 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 811 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 812 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 813 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 814 | .execute_write_same = fd_execute_write_same, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 815 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 816 | }; |
| 817 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 818 | static sense_reason_t |
| 819 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 820 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 821 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 822 | } |
| 823 | |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 824 | static const struct target_backend_ops fileio_ops = { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 825 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 826 | .inquiry_prod = "FILEIO", |
| 827 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 828 | .owner = THIS_MODULE, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 829 | .attach_hba = fd_attach_hba, |
| 830 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 831 | .alloc_device = fd_alloc_device, |
| 832 | .configure_device = fd_configure_device, |
Mike Christie | 9263470 | 2017-06-23 01:18:12 -0500 | [diff] [blame] | 833 | .destroy_device = fd_destroy_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 834 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 835 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 836 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 837 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 838 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 839 | .get_blocks = fd_get_blocks, |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 840 | .init_prot = fd_init_prot, |
| 841 | .format_prot = fd_format_prot, |
| 842 | .free_prot = fd_free_prot, |
Christoph Hellwig | 5873c4d | 2015-05-10 18:14:57 +0200 | [diff] [blame] | 843 | .tb_dev_attrib_attrs = sbc_attrib_attrs, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 844 | }; |
| 845 | |
| 846 | static int __init fileio_module_init(void) |
| 847 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 848 | return transport_backend_register(&fileio_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 849 | } |
| 850 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 851 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 852 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 853 | target_backend_unregister(&fileio_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 857 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 858 | MODULE_LICENSE("GPL"); |
| 859 | |
| 860 | module_init(fileio_module_init); |
| 861 | module_exit(fileio_module_exit); |