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> |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 33 | #include <linux/falloc.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 34 | #include <scsi/scsi.h> |
| 35 | #include <scsi/scsi_host.h> |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 36 | #include <asm/unaligned.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | |
| 38 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 39 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 40 | |
| 41 | #include "target_core_file.h" |
| 42 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 43 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
| 44 | { |
| 45 | return container_of(dev, struct fd_dev, dev); |
| 46 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 47 | |
| 48 | /* fd_attach_hba(): (Part of se_subsystem_api_t template) |
| 49 | * |
| 50 | * |
| 51 | */ |
| 52 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
| 53 | { |
| 54 | struct fd_host *fd_host; |
| 55 | |
| 56 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 57 | if (!fd_host) { |
| 58 | pr_err("Unable to allocate memory for struct fd_host\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 59 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | fd_host->fd_host_id = host_id; |
| 63 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 64 | hba->hba_ptr = fd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 66 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
| 68 | TARGET_CORE_MOD_VERSION); |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 69 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
| 70 | hba->hba_id, fd_host->fd_host_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static void fd_detach_hba(struct se_hba *hba) |
| 76 | { |
| 77 | struct fd_host *fd_host = hba->hba_ptr; |
| 78 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 79 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 80 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
| 81 | |
| 82 | kfree(fd_host); |
| 83 | hba->hba_ptr = NULL; |
| 84 | } |
| 85 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 86 | 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] | 87 | { |
| 88 | struct fd_dev *fd_dev; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 89 | struct fd_host *fd_host = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 90 | |
| 91 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 92 | if (!fd_dev) { |
| 93 | pr_err("Unable to allocate memory for struct fd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | fd_dev->fd_host = fd_host; |
| 98 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 99 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 100 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 101 | return &fd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | } |
| 103 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 104 | static int fd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 106 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 107 | struct fd_host *fd_host = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 108 | struct file *file; |
| 109 | struct inode *inode = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 110 | int flags, ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 111 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 112 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
| 113 | pr_err("Missing fd_dev_name=\n"); |
| 114 | return -EINVAL; |
| 115 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 116 | |
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 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
| 119 | * of pure timestamp updates. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | */ |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 121 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 122 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 123 | /* |
| 124 | * Optionally allow fd_buffered_io=1 to be enabled for people |
| 125 | * who want use the fs buffer cache as an WriteCache mechanism. |
| 126 | * |
| 127 | * This means that in event of a hard failure, there is a risk |
| 128 | * of silent data-loss if the SCSI client has *not* performed a |
| 129 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE |
| 130 | * to write-out the entire device cache. |
| 131 | */ |
| 132 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 133 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); |
| 134 | flags &= ~O_DSYNC; |
| 135 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 136 | |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 137 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 138 | if (IS_ERR(file)) { |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 139 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 140 | ret = PTR_ERR(file); |
| 141 | goto fail; |
| 142 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 143 | fd_dev->fd_file = file; |
| 144 | /* |
| 145 | * If using a block backend with this struct file, we extract |
| 146 | * fd_dev->fd_[block,dev]_size from struct block_device. |
| 147 | * |
| 148 | * Otherwise, we use the passed fd_size= from configfs |
| 149 | */ |
| 150 | inode = file->f_mapping->host; |
| 151 | if (S_ISBLK(inode->i_mode)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 152 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 153 | unsigned long long dev_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 154 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 155 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 156 | /* |
| 157 | * Determine the number of bytes from i_size_read() minus |
| 158 | * one (1) logical sector from underlying struct block_device |
| 159 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 160 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 161 | fd_dev->fd_block_size); |
| 162 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 163 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 164 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 165 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 166 | fd_dev->fd_block_size); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 167 | /* |
| 168 | * Check if the underlying struct block_device request_queue supports |
| 169 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| 170 | * in ATA and we need to set TPE=1 |
| 171 | */ |
| 172 | if (blk_queue_discard(q)) { |
| 173 | dev->dev_attrib.max_unmap_lba_count = |
| 174 | q->limits.max_discard_sectors; |
| 175 | /* |
| 176 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 177 | */ |
| 178 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 179 | dev->dev_attrib.unmap_granularity = |
| 180 | q->limits.discard_granularity >> 9; |
| 181 | dev->dev_attrib.unmap_granularity_alignment = |
| 182 | q->limits.discard_alignment; |
| 183 | pr_debug("IFILE: BLOCK Discard support available," |
| 184 | " disabled by default\n"); |
| 185 | } |
| 186 | /* |
| 187 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 188 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 189 | */ |
| 190 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Asias He | 0463a3f | 2013-04-24 19:38:11 -0700 | [diff] [blame] | 191 | |
| 192 | if (blk_queue_nonrot(q)) |
| 193 | dev->dev_attrib.is_nonrot = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 194 | } else { |
| 195 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 196 | pr_err("FILEIO: Missing fd_dev_size=" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 197 | " parameter, and no backing struct" |
| 198 | " block_device\n"); |
| 199 | goto fail; |
| 200 | } |
| 201 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 202 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 203 | /* |
| 204 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 205 | */ |
| 206 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 207 | /* |
| 208 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 209 | */ |
| 210 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 211 | dev->dev_attrib.unmap_granularity = 1; |
| 212 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 213 | |
| 214 | /* |
| 215 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 216 | * based upon struct iovec limit for vfs_writev() |
| 217 | */ |
| 218 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 219 | } |
| 220 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 221 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 222 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
| 223 | 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] | 224 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 226 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 227 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" |
| 228 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 229 | dev->dev_attrib.emulate_write_cache = 1; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 230 | } |
| 231 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 232 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
| 233 | fd_dev->fd_queue_depth = dev->queue_depth; |
| 234 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 235 | 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] | 236 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
| 237 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); |
| 238 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 239 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 240 | fail: |
| 241 | if (fd_dev->fd_file) { |
| 242 | filp_close(fd_dev->fd_file, NULL); |
| 243 | fd_dev->fd_file = NULL; |
| 244 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 245 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 246 | } |
| 247 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 248 | static void fd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 249 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 250 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 251 | |
| 252 | if (fd_dev->fd_file) { |
| 253 | filp_close(fd_dev->fd_file, NULL); |
| 254 | fd_dev->fd_file = NULL; |
| 255 | } |
| 256 | |
| 257 | kfree(fd_dev); |
| 258 | } |
| 259 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 260 | static int fd_do_prot_rw(struct se_cmd *cmd, struct fd_prot *fd_prot, |
| 261 | int is_write) |
| 262 | { |
| 263 | struct se_device *se_dev = cmd->se_dev; |
| 264 | struct fd_dev *dev = FD_DEV(se_dev); |
| 265 | struct file *prot_fd = dev->fd_prot_file; |
| 266 | struct scatterlist *sg; |
| 267 | loff_t pos = (cmd->t_task_lba * se_dev->prot_length); |
| 268 | unsigned char *buf; |
| 269 | u32 prot_size, len, size; |
| 270 | int rc, ret = 1, i; |
| 271 | |
| 272 | prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * |
| 273 | se_dev->prot_length; |
| 274 | |
| 275 | if (!is_write) { |
| 276 | fd_prot->prot_buf = vzalloc(prot_size); |
| 277 | if (!fd_prot->prot_buf) { |
| 278 | pr_err("Unable to allocate fd_prot->prot_buf\n"); |
| 279 | return -ENOMEM; |
| 280 | } |
| 281 | buf = fd_prot->prot_buf; |
| 282 | |
| 283 | fd_prot->prot_sg_nents = cmd->t_prot_nents; |
| 284 | fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist) * |
| 285 | fd_prot->prot_sg_nents, GFP_KERNEL); |
| 286 | if (!fd_prot->prot_sg) { |
| 287 | pr_err("Unable to allocate fd_prot->prot_sg\n"); |
| 288 | vfree(fd_prot->prot_buf); |
| 289 | return -ENOMEM; |
| 290 | } |
| 291 | size = prot_size; |
| 292 | |
| 293 | for_each_sg(fd_prot->prot_sg, sg, fd_prot->prot_sg_nents, i) { |
| 294 | |
| 295 | len = min_t(u32, PAGE_SIZE, size); |
| 296 | sg_set_buf(sg, buf, len); |
| 297 | size -= len; |
| 298 | buf += len; |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | if (is_write) { |
| 303 | rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); |
| 304 | if (rc < 0 || prot_size != rc) { |
| 305 | pr_err("kernel_write() for fd_do_prot_rw failed:" |
| 306 | " %d\n", rc); |
| 307 | ret = -EINVAL; |
| 308 | } |
| 309 | } else { |
| 310 | rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); |
| 311 | if (rc < 0) { |
| 312 | pr_err("kernel_read() for fd_do_prot_rw failed:" |
| 313 | " %d\n", rc); |
| 314 | ret = -EINVAL; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | if (is_write || ret < 0) { |
| 319 | kfree(fd_prot->prot_sg); |
| 320 | vfree(fd_prot->prot_buf); |
| 321 | } |
| 322 | |
| 323 | return ret; |
| 324 | } |
| 325 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 326 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
| 327 | u32 sgl_nents, int is_write) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 328 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 329 | struct se_device *se_dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 330 | struct fd_dev *dev = FD_DEV(se_dev); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 331 | struct file *fd = dev->fd_file; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 332 | struct scatterlist *sg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 333 | struct iovec *iov; |
| 334 | mm_segment_t old_fs; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 335 | loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 336 | int ret = 0, i; |
| 337 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 338 | iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 339 | if (!iov) { |
| 340 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 341 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 342 | } |
| 343 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 344 | for_each_sg(sgl, sg, sgl_nents, i) { |
Sebastian Andrzej Siewior | 9649fa1 | 2011-11-28 12:33:10 +0100 | [diff] [blame] | 345 | iov[i].iov_len = sg->length; |
Sebastian Andrzej Siewior | 40ff2c3 | 2012-12-05 12:08:29 +0100 | [diff] [blame] | 346 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | old_fs = get_fs(); |
| 350 | set_fs(get_ds()); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 351 | |
| 352 | if (is_write) |
| 353 | ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); |
| 354 | else |
| 355 | ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); |
| 356 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 357 | set_fs(old_fs); |
| 358 | |
Sebastian Andrzej Siewior | 40ff2c3 | 2012-12-05 12:08:29 +0100 | [diff] [blame] | 359 | for_each_sg(sgl, sg, sgl_nents, i) |
| 360 | kunmap(sg_page(sg)); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 361 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 362 | kfree(iov); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 363 | |
| 364 | if (is_write) { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 365 | if (ret < 0 || ret != cmd->data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 366 | pr_err("%s() write returned %d\n", __func__, ret); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 367 | return (ret < 0 ? ret : -EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 368 | } |
| 369 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 370 | /* |
| 371 | * Return zeros and GOOD status even if the READ did not return |
| 372 | * the expected virt_size for struct file w/o a backing struct |
| 373 | * block_device. |
| 374 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 375 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 376 | if (ret < 0 || ret != cmd->data_length) { |
| 377 | pr_err("%s() returned %d, expecting %u for " |
| 378 | "S_ISBLK\n", __func__, ret, |
| 379 | cmd->data_length); |
| 380 | return (ret < 0 ? ret : -EINVAL); |
| 381 | } |
| 382 | } else { |
| 383 | if (ret < 0) { |
| 384 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 385 | __func__, ret); |
| 386 | return ret; |
| 387 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 388 | } |
| 389 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 390 | return 1; |
| 391 | } |
| 392 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 393 | static sense_reason_t |
| 394 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 395 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 397 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 398 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 399 | loff_t start, end; |
| 400 | int ret; |
| 401 | |
| 402 | /* |
| 403 | * If the Immediate bit is set, queue up the GOOD response |
| 404 | * for this SYNCHRONIZE_CACHE op |
| 405 | */ |
| 406 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 407 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 408 | |
| 409 | /* |
| 410 | * Determine if we will be flushing the entire device. |
| 411 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 412 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 413 | start = 0; |
| 414 | end = LLONG_MAX; |
| 415 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 416 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | if (cmd->data_length) |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame^] | 418 | end = start + cmd->data_length - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 419 | else |
| 420 | end = LLONG_MAX; |
| 421 | } |
| 422 | |
| 423 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 424 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 425 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 427 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 428 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 429 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 430 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 431 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 432 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 433 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 434 | |
| 435 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 436 | } |
| 437 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 438 | static unsigned char * |
| 439 | fd_setup_write_same_buf(struct se_cmd *cmd, struct scatterlist *sg, |
| 440 | unsigned int len) |
| 441 | { |
| 442 | struct se_device *se_dev = cmd->se_dev; |
| 443 | unsigned int block_size = se_dev->dev_attrib.block_size; |
| 444 | unsigned int i = 0, end; |
| 445 | unsigned char *buf, *p, *kmap_buf; |
| 446 | |
| 447 | buf = kzalloc(min_t(unsigned int, len, PAGE_SIZE), GFP_KERNEL); |
| 448 | if (!buf) { |
| 449 | pr_err("Unable to allocate fd_execute_write_same buf\n"); |
| 450 | return NULL; |
| 451 | } |
| 452 | |
| 453 | kmap_buf = kmap(sg_page(sg)) + sg->offset; |
| 454 | if (!kmap_buf) { |
| 455 | pr_err("kmap() failed in fd_setup_write_same\n"); |
| 456 | kfree(buf); |
| 457 | return NULL; |
| 458 | } |
| 459 | /* |
| 460 | * Fill local *buf to contain multiple WRITE_SAME blocks up to |
| 461 | * min(len, PAGE_SIZE) |
| 462 | */ |
| 463 | p = buf; |
| 464 | end = min_t(unsigned int, len, PAGE_SIZE); |
| 465 | |
| 466 | while (i < end) { |
| 467 | memcpy(p, kmap_buf, block_size); |
| 468 | |
| 469 | i += block_size; |
| 470 | p += block_size; |
| 471 | } |
| 472 | kunmap(sg_page(sg)); |
| 473 | |
| 474 | return buf; |
| 475 | } |
| 476 | |
| 477 | static sense_reason_t |
| 478 | fd_execute_write_same(struct se_cmd *cmd) |
| 479 | { |
| 480 | struct se_device *se_dev = cmd->se_dev; |
| 481 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 482 | struct file *f = fd_dev->fd_file; |
| 483 | struct scatterlist *sg; |
| 484 | struct iovec *iov; |
| 485 | mm_segment_t old_fs; |
Roland Dreier | 972b29c8 | 2013-02-22 09:52:57 -0800 | [diff] [blame] | 486 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 487 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
| 488 | unsigned int len, len_tmp, iov_num; |
| 489 | int i, rc; |
| 490 | unsigned char *buf; |
| 491 | |
| 492 | if (!nolb) { |
| 493 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 494 | return 0; |
| 495 | } |
| 496 | sg = &cmd->t_data_sg[0]; |
| 497 | |
| 498 | if (cmd->t_data_nents > 1 || |
| 499 | sg->length != cmd->se_dev->dev_attrib.block_size) { |
| 500 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
| 501 | " block_size: %u\n", cmd->t_data_nents, sg->length, |
| 502 | cmd->se_dev->dev_attrib.block_size); |
| 503 | return TCM_INVALID_CDB_FIELD; |
| 504 | } |
| 505 | |
| 506 | len = len_tmp = nolb * se_dev->dev_attrib.block_size; |
| 507 | iov_num = DIV_ROUND_UP(len, PAGE_SIZE); |
| 508 | |
| 509 | buf = fd_setup_write_same_buf(cmd, sg, len); |
| 510 | if (!buf) |
| 511 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 512 | |
| 513 | iov = vzalloc(sizeof(struct iovec) * iov_num); |
| 514 | if (!iov) { |
| 515 | pr_err("Unable to allocate fd_execute_write_same iovecs\n"); |
| 516 | kfree(buf); |
| 517 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 518 | } |
| 519 | /* |
| 520 | * Map the single fabric received scatterlist block now populated |
| 521 | * in *buf into each iovec for I/O submission. |
| 522 | */ |
| 523 | for (i = 0; i < iov_num; i++) { |
| 524 | iov[i].iov_base = buf; |
| 525 | iov[i].iov_len = min_t(unsigned int, len_tmp, PAGE_SIZE); |
| 526 | len_tmp -= iov[i].iov_len; |
| 527 | } |
| 528 | |
| 529 | old_fs = get_fs(); |
| 530 | set_fs(get_ds()); |
| 531 | rc = vfs_writev(f, &iov[0], iov_num, &pos); |
| 532 | set_fs(old_fs); |
| 533 | |
| 534 | vfree(iov); |
| 535 | kfree(buf); |
| 536 | |
| 537 | if (rc < 0 || rc != len) { |
| 538 | pr_err("vfs_writev() returned %d for write same\n", rc); |
| 539 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 540 | } |
| 541 | |
| 542 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 543 | return 0; |
| 544 | } |
| 545 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 546 | static sense_reason_t |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 547 | fd_do_unmap(struct se_cmd *cmd, void *priv, sector_t lba, sector_t nolb) |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 548 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 549 | struct file *file = priv; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 550 | struct inode *inode = file->f_mapping->host; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 551 | int ret; |
| 552 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 553 | if (S_ISBLK(inode->i_mode)) { |
| 554 | /* The backend is block device, use discard */ |
| 555 | struct block_device *bdev = inode->i_bdev; |
| 556 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 557 | ret = blkdev_issue_discard(bdev, lba, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 558 | nolb, GFP_KERNEL, 0); |
| 559 | if (ret < 0) { |
| 560 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 561 | ret); |
| 562 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 563 | } |
| 564 | } else { |
| 565 | /* The backend is normal file, use fallocate */ |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 566 | struct se_device *se_dev = cmd->se_dev; |
| 567 | loff_t pos = lba * se_dev->dev_attrib.block_size; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 568 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 569 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 570 | |
| 571 | if (!file->f_op->fallocate) |
| 572 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 573 | |
| 574 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 575 | if (ret < 0) { |
| 576 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 577 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 578 | } |
| 579 | } |
| 580 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static sense_reason_t |
| 585 | fd_execute_write_same_unmap(struct se_cmd *cmd) |
| 586 | { |
| 587 | struct se_device *se_dev = cmd->se_dev; |
| 588 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 589 | struct file *file = fd_dev->fd_file; |
| 590 | sector_t lba = cmd->t_task_lba; |
| 591 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 592 | int ret; |
| 593 | |
| 594 | if (!nolb) { |
| 595 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | ret = fd_do_unmap(cmd, file, lba, nolb); |
| 600 | if (ret) |
| 601 | return ret; |
| 602 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 603 | target_complete_cmd(cmd, GOOD); |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static sense_reason_t |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 608 | fd_execute_unmap(struct se_cmd *cmd) |
| 609 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 610 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 611 | |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 612 | return sbc_execute_unmap(cmd, fd_do_unmap, file); |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | static sense_reason_t |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 616 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 617 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 618 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 619 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 620 | struct fd_prot fd_prot; |
| 621 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 622 | int ret = 0; |
| 623 | |
| 624 | /* |
| 625 | * Call vectorized fileio functions to map struct scatterlist |
| 626 | * physical memory addresses to struct iovec virtual memory. |
| 627 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 628 | if (data_direction == DMA_FROM_DEVICE) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 629 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 630 | |
| 631 | if (cmd->prot_type) { |
| 632 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 633 | if (ret < 0) |
| 634 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 635 | } |
| 636 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 637 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 638 | |
| 639 | if (ret > 0 && cmd->prot_type) { |
| 640 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 641 | |
| 642 | rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, |
| 643 | 0, fd_prot.prot_sg, 0); |
| 644 | if (rc) { |
| 645 | kfree(fd_prot.prot_sg); |
| 646 | vfree(fd_prot.prot_buf); |
| 647 | return rc; |
| 648 | } |
| 649 | kfree(fd_prot.prot_sg); |
| 650 | vfree(fd_prot.prot_buf); |
| 651 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | } else { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 653 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 654 | |
| 655 | if (cmd->prot_type) { |
| 656 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 657 | |
| 658 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 659 | if (ret < 0) |
| 660 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 661 | |
| 662 | rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, |
| 663 | 0, fd_prot.prot_sg, 0); |
| 664 | if (rc) { |
| 665 | kfree(fd_prot.prot_sg); |
| 666 | vfree(fd_prot.prot_buf); |
| 667 | return rc; |
| 668 | } |
| 669 | } |
| 670 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 671 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 672 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 673 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 674 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 675 | * Allow this to happen independent of WCE=0 setting. |
| 676 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 677 | if (ret > 0 && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 678 | dev->dev_attrib.emulate_fua_write > 0 && |
Christoph Hellwig | 2d3a4b5 | 2011-11-14 11:36:29 -0500 | [diff] [blame] | 679 | (cmd->se_cmd_flags & SCF_FUA)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 680 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 681 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 682 | dev->dev_attrib.block_size; |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame^] | 683 | loff_t end; |
| 684 | |
| 685 | if (cmd->data_length) |
| 686 | end = start + cmd->data_length - 1; |
| 687 | else |
| 688 | end = LLONG_MAX; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 689 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 690 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 691 | } |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 692 | |
| 693 | if (ret > 0 && cmd->prot_type) { |
| 694 | ret = fd_do_prot_rw(cmd, &fd_prot, true); |
| 695 | if (ret < 0) |
| 696 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 697 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 698 | } |
| 699 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 700 | if (ret < 0) { |
| 701 | kfree(fd_prot.prot_sg); |
| 702 | vfree(fd_prot.prot_buf); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 703 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 704 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 705 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 706 | if (ret) |
| 707 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 708 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 709 | } |
| 710 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 711 | enum { |
| 712 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err |
| 713 | }; |
| 714 | |
| 715 | static match_table_t tokens = { |
| 716 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 717 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 718 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 719 | {Opt_err, NULL} |
| 720 | }; |
| 721 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 722 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 723 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 724 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 725 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 726 | char *orig, *ptr, *arg_p, *opts; |
| 727 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 728 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 729 | |
| 730 | opts = kstrdup(page, GFP_KERNEL); |
| 731 | if (!opts) |
| 732 | return -ENOMEM; |
| 733 | |
| 734 | orig = opts; |
| 735 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 736 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 737 | if (!*ptr) |
| 738 | continue; |
| 739 | |
| 740 | token = match_token(ptr, tokens, args); |
| 741 | switch (token) { |
| 742 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 743 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 744 | FD_MAX_DEV_NAME) == 0) { |
| 745 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 746 | break; |
| 747 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 748 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 749 | fd_dev->fd_dev_name); |
| 750 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 751 | break; |
| 752 | case Opt_fd_dev_size: |
| 753 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 754 | if (!arg_p) { |
| 755 | ret = -ENOMEM; |
| 756 | break; |
| 757 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 758 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 759 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 760 | if (ret < 0) { |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 761 | pr_err("kstrtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 762 | " fd_dev_size=\n"); |
| 763 | goto out; |
| 764 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 765 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 766 | " bytes\n", fd_dev->fd_dev_size); |
| 767 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 768 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 769 | case Opt_fd_buffered_io: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 770 | ret = match_int(args, &arg); |
| 771 | if (ret) |
| 772 | goto out; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 773 | if (arg != 1) { |
| 774 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 775 | ret = -EINVAL; |
| 776 | goto out; |
| 777 | } |
| 778 | |
| 779 | pr_debug("FILEIO: Using buffered I/O" |
| 780 | " operations for struct fd_dev\n"); |
| 781 | |
| 782 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 783 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 784 | default: |
| 785 | break; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | out: |
| 790 | kfree(orig); |
| 791 | return (!ret) ? count : ret; |
| 792 | } |
| 793 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 794 | 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] | 795 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 796 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 797 | ssize_t bl = 0; |
| 798 | |
| 799 | 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] | 800 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
| 801 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 802 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
| 803 | "Buffered-WCE" : "O_DSYNC"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 804 | return bl; |
| 805 | } |
| 806 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 807 | static sector_t fd_get_blocks(struct se_device *dev) |
| 808 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 809 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 810 | struct file *f = fd_dev->fd_file; |
| 811 | struct inode *i = f->f_mapping->host; |
| 812 | unsigned long long dev_size; |
| 813 | /* |
| 814 | * When using a file that references an underlying struct block_device, |
| 815 | * ensure dev_size is always based on the current inode size in order |
| 816 | * to handle underlying block_device resize operations. |
| 817 | */ |
| 818 | if (S_ISBLK(i->i_mode)) |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 819 | dev_size = i_size_read(i); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 820 | else |
| 821 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 822 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 823 | return div_u64(dev_size - dev->dev_attrib.block_size, |
| 824 | dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 825 | } |
| 826 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 827 | static int fd_init_prot(struct se_device *dev) |
| 828 | { |
| 829 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 830 | struct file *prot_file, *file = fd_dev->fd_file; |
| 831 | struct inode *inode; |
| 832 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
| 833 | char buf[FD_MAX_DEV_PROT_NAME]; |
| 834 | |
| 835 | if (!file) { |
| 836 | pr_err("Unable to locate fd_dev->fd_file\n"); |
| 837 | return -ENODEV; |
| 838 | } |
| 839 | |
| 840 | inode = file->f_mapping->host; |
| 841 | if (S_ISBLK(inode->i_mode)) { |
| 842 | pr_err("FILEIO Protection emulation only supported on" |
| 843 | " !S_ISBLK\n"); |
| 844 | return -ENOSYS; |
| 845 | } |
| 846 | |
| 847 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) |
| 848 | flags &= ~O_DSYNC; |
| 849 | |
| 850 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", |
| 851 | fd_dev->fd_dev_name); |
| 852 | |
| 853 | prot_file = filp_open(buf, flags, 0600); |
| 854 | if (IS_ERR(prot_file)) { |
| 855 | pr_err("filp_open(%s) failed\n", buf); |
| 856 | ret = PTR_ERR(prot_file); |
| 857 | return ret; |
| 858 | } |
| 859 | fd_dev->fd_prot_file = prot_file; |
| 860 | |
| 861 | return 0; |
| 862 | } |
| 863 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 864 | static int fd_format_prot(struct se_device *dev) |
| 865 | { |
| 866 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 867 | struct file *prot_fd = fd_dev->fd_prot_file; |
| 868 | sector_t prot_length, prot; |
| 869 | unsigned char *buf; |
| 870 | loff_t pos = 0; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 871 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
| 872 | int rc, ret = 0, size, len; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 873 | |
| 874 | if (!dev->dev_attrib.pi_prot_type) { |
| 875 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); |
| 876 | return -ENODEV; |
| 877 | } |
| 878 | if (!prot_fd) { |
| 879 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); |
| 880 | return -ENODEV; |
| 881 | } |
| 882 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 883 | buf = vzalloc(unit_size); |
| 884 | if (!buf) { |
| 885 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 886 | return -ENOMEM; |
| 887 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 888 | prot_length = (dev->transport->get_blocks(dev) + 1) * dev->prot_length; |
| 889 | size = prot_length; |
| 890 | |
| 891 | pr_debug("Using FILEIO prot_length: %llu\n", |
| 892 | (unsigned long long)prot_length); |
| 893 | |
Sagi Grimberg | 80dcd0c | 2014-02-19 17:50:16 +0200 | [diff] [blame] | 894 | memset(buf, 0xff, unit_size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 895 | for (prot = 0; prot < prot_length; prot += unit_size) { |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 896 | len = min(unit_size, size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 897 | rc = kernel_write(prot_fd, buf, len, pos); |
| 898 | if (rc != len) { |
| 899 | pr_err("vfs_write to prot file failed: %d\n", rc); |
| 900 | ret = -ENODEV; |
| 901 | goto out; |
| 902 | } |
| 903 | pos += len; |
| 904 | size -= len; |
| 905 | } |
| 906 | |
| 907 | out: |
| 908 | vfree(buf); |
| 909 | return ret; |
| 910 | } |
| 911 | |
| 912 | static void fd_free_prot(struct se_device *dev) |
| 913 | { |
| 914 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 915 | |
| 916 | if (!fd_dev->fd_prot_file) |
| 917 | return; |
| 918 | |
| 919 | filp_close(fd_dev->fd_prot_file, NULL); |
| 920 | fd_dev->fd_prot_file = NULL; |
| 921 | } |
| 922 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 923 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 924 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 925 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 926 | .execute_write_same = fd_execute_write_same, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 927 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 928 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 929 | }; |
| 930 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 931 | static sense_reason_t |
| 932 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 933 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 934 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 935 | } |
| 936 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 937 | static struct se_subsystem_api fileio_template = { |
| 938 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 939 | .inquiry_prod = "FILEIO", |
| 940 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 941 | .owner = THIS_MODULE, |
| 942 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
| 943 | .attach_hba = fd_attach_hba, |
| 944 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 945 | .alloc_device = fd_alloc_device, |
| 946 | .configure_device = fd_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 947 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 948 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 949 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 950 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 951 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 952 | .get_blocks = fd_get_blocks, |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 953 | .init_prot = fd_init_prot, |
| 954 | .format_prot = fd_format_prot, |
| 955 | .free_prot = fd_free_prot, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 956 | }; |
| 957 | |
| 958 | static int __init fileio_module_init(void) |
| 959 | { |
| 960 | return transport_subsystem_register(&fileio_template); |
| 961 | } |
| 962 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 963 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 964 | { |
| 965 | transport_subsystem_release(&fileio_template); |
| 966 | } |
| 967 | |
| 968 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 969 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 970 | MODULE_LICENSE("GPL"); |
| 971 | |
| 972 | module_init(fileio_module_init); |
| 973 | module_exit(fileio_module_exit); |