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 | fd9a11d | 2012-11-09 14:51:48 -0800 | [diff] [blame] | 6 | * (c) Copyright 2005-2012 RisingTide Systems LLC. |
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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 69 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 70 | " MaxSectors: %u\n", |
| 71 | hba->hba_id, fd_host->fd_host_id, FD_MAX_SECTORS); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static void fd_detach_hba(struct se_hba *hba) |
| 77 | { |
| 78 | struct fd_host *fd_host = hba->hba_ptr; |
| 79 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 80 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
| 82 | |
| 83 | kfree(fd_host); |
| 84 | hba->hba_ptr = NULL; |
| 85 | } |
| 86 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 87 | 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] | 88 | { |
| 89 | struct fd_dev *fd_dev; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 90 | struct fd_host *fd_host = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | |
| 92 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 93 | if (!fd_dev) { |
| 94 | pr_err("Unable to allocate memory for struct fd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | fd_dev->fd_host = fd_host; |
| 99 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 100 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 101 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 102 | return &fd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 103 | } |
| 104 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 105 | static int fd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 106 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 107 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 108 | struct fd_host *fd_host = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 109 | struct file *file; |
| 110 | struct inode *inode = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 111 | int flags, ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 112 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 113 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
| 114 | pr_err("Missing fd_dev_name=\n"); |
| 115 | return -EINVAL; |
| 116 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 117 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 118 | /* |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 119 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
| 120 | * of pure timestamp updates. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | */ |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 122 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 123 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 124 | /* |
| 125 | * Optionally allow fd_buffered_io=1 to be enabled for people |
| 126 | * who want use the fs buffer cache as an WriteCache mechanism. |
| 127 | * |
| 128 | * This means that in event of a hard failure, there is a risk |
| 129 | * of silent data-loss if the SCSI client has *not* performed a |
| 130 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE |
| 131 | * to write-out the entire device cache. |
| 132 | */ |
| 133 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 134 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); |
| 135 | flags &= ~O_DSYNC; |
| 136 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 138 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 139 | if (IS_ERR(file)) { |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 140 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 141 | ret = PTR_ERR(file); |
| 142 | goto fail; |
| 143 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 144 | fd_dev->fd_file = file; |
| 145 | /* |
| 146 | * If using a block backend with this struct file, we extract |
| 147 | * fd_dev->fd_[block,dev]_size from struct block_device. |
| 148 | * |
| 149 | * Otherwise, we use the passed fd_size= from configfs |
| 150 | */ |
| 151 | inode = file->f_mapping->host; |
| 152 | if (S_ISBLK(inode->i_mode)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 153 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 154 | unsigned long long dev_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 155 | |
| 156 | dev->dev_attrib.hw_block_size = |
| 157 | bdev_logical_block_size(inode->i_bdev); |
| 158 | dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q); |
| 159 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 160 | /* |
| 161 | * Determine the number of bytes from i_size_read() minus |
| 162 | * one (1) logical sector from underlying struct block_device |
| 163 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 164 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 165 | fd_dev->fd_block_size); |
| 166 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 167 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 168 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 169 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 170 | fd_dev->fd_block_size); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 171 | /* |
| 172 | * Check if the underlying struct block_device request_queue supports |
| 173 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| 174 | * in ATA and we need to set TPE=1 |
| 175 | */ |
| 176 | if (blk_queue_discard(q)) { |
| 177 | dev->dev_attrib.max_unmap_lba_count = |
| 178 | q->limits.max_discard_sectors; |
| 179 | /* |
| 180 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 181 | */ |
| 182 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 183 | dev->dev_attrib.unmap_granularity = |
| 184 | q->limits.discard_granularity >> 9; |
| 185 | dev->dev_attrib.unmap_granularity_alignment = |
| 186 | q->limits.discard_alignment; |
| 187 | pr_debug("IFILE: BLOCK Discard support available," |
| 188 | " disabled by default\n"); |
| 189 | } |
| 190 | /* |
| 191 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 192 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 193 | */ |
| 194 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 195 | } else { |
| 196 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 197 | pr_err("FILEIO: Missing fd_dev_size=" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 198 | " parameter, and no backing struct" |
| 199 | " block_device\n"); |
| 200 | goto fail; |
| 201 | } |
| 202 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 203 | dev->dev_attrib.hw_block_size = FD_BLOCKSIZE; |
| 204 | dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 205 | |
| 206 | /* |
| 207 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 208 | */ |
| 209 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 210 | /* |
| 211 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 212 | */ |
| 213 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 214 | dev->dev_attrib.unmap_granularity = 1; |
| 215 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 216 | |
| 217 | /* |
| 218 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 219 | * based upon struct iovec limit for vfs_writev() |
| 220 | */ |
| 221 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | } |
| 223 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 224 | fd_dev->fd_block_size = dev->dev_attrib.hw_block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 226 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 227 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 228 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 229 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" |
| 230 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 231 | dev->dev_attrib.emulate_write_cache = 1; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 234 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
| 235 | fd_dev->fd_queue_depth = dev->queue_depth; |
| 236 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 237 | 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] | 238 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
| 239 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); |
| 240 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 241 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 242 | fail: |
| 243 | if (fd_dev->fd_file) { |
| 244 | filp_close(fd_dev->fd_file, NULL); |
| 245 | fd_dev->fd_file = NULL; |
| 246 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 247 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 248 | } |
| 249 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 250 | static void fd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 251 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 252 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 253 | |
| 254 | if (fd_dev->fd_file) { |
| 255 | filp_close(fd_dev->fd_file, NULL); |
| 256 | fd_dev->fd_file = NULL; |
| 257 | } |
| 258 | |
| 259 | kfree(fd_dev); |
| 260 | } |
| 261 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 262 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
| 263 | u32 sgl_nents, int is_write) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 264 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 265 | struct se_device *se_dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 266 | struct fd_dev *dev = FD_DEV(se_dev); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 267 | struct file *fd = dev->fd_file; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 268 | struct scatterlist *sg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 269 | struct iovec *iov; |
| 270 | mm_segment_t old_fs; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 271 | 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] | 272 | int ret = 0, i; |
| 273 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 274 | iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 275 | if (!iov) { |
| 276 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 277 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 278 | } |
| 279 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 280 | for_each_sg(sgl, sg, sgl_nents, i) { |
Sebastian Andrzej Siewior | 9649fa1 | 2011-11-28 12:33:10 +0100 | [diff] [blame] | 281 | iov[i].iov_len = sg->length; |
Sebastian Andrzej Siewior | 40ff2c3 | 2012-12-05 12:08:29 +0100 | [diff] [blame] | 282 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | old_fs = get_fs(); |
| 286 | set_fs(get_ds()); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 287 | |
| 288 | if (is_write) |
| 289 | ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); |
| 290 | else |
| 291 | ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); |
| 292 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 293 | set_fs(old_fs); |
| 294 | |
Sebastian Andrzej Siewior | 40ff2c3 | 2012-12-05 12:08:29 +0100 | [diff] [blame] | 295 | for_each_sg(sgl, sg, sgl_nents, i) |
| 296 | kunmap(sg_page(sg)); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 297 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 298 | kfree(iov); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 299 | |
| 300 | if (is_write) { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 301 | if (ret < 0 || ret != cmd->data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 302 | pr_err("%s() write returned %d\n", __func__, ret); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 303 | return (ret < 0 ? ret : -EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 304 | } |
| 305 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 306 | /* |
| 307 | * Return zeros and GOOD status even if the READ did not return |
| 308 | * the expected virt_size for struct file w/o a backing struct |
| 309 | * block_device. |
| 310 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 311 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 312 | if (ret < 0 || ret != cmd->data_length) { |
| 313 | pr_err("%s() returned %d, expecting %u for " |
| 314 | "S_ISBLK\n", __func__, ret, |
| 315 | cmd->data_length); |
| 316 | return (ret < 0 ? ret : -EINVAL); |
| 317 | } |
| 318 | } else { |
| 319 | if (ret < 0) { |
| 320 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 321 | __func__, ret); |
| 322 | return ret; |
| 323 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 324 | } |
| 325 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | return 1; |
| 327 | } |
| 328 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 329 | static sense_reason_t |
| 330 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 331 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 332 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 333 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 334 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 335 | loff_t start, end; |
| 336 | int ret; |
| 337 | |
| 338 | /* |
| 339 | * If the Immediate bit is set, queue up the GOOD response |
| 340 | * for this SYNCHRONIZE_CACHE op |
| 341 | */ |
| 342 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 343 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 344 | |
| 345 | /* |
| 346 | * Determine if we will be flushing the entire device. |
| 347 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 348 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | start = 0; |
| 350 | end = LLONG_MAX; |
| 351 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 352 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 353 | if (cmd->data_length) |
| 354 | end = start + cmd->data_length; |
| 355 | else |
| 356 | end = LLONG_MAX; |
| 357 | } |
| 358 | |
| 359 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 360 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 361 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 362 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 363 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 364 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 365 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 366 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 367 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 368 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 369 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 370 | |
| 371 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 372 | } |
| 373 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 374 | static unsigned char * |
| 375 | fd_setup_write_same_buf(struct se_cmd *cmd, struct scatterlist *sg, |
| 376 | unsigned int len) |
| 377 | { |
| 378 | struct se_device *se_dev = cmd->se_dev; |
| 379 | unsigned int block_size = se_dev->dev_attrib.block_size; |
| 380 | unsigned int i = 0, end; |
| 381 | unsigned char *buf, *p, *kmap_buf; |
| 382 | |
| 383 | buf = kzalloc(min_t(unsigned int, len, PAGE_SIZE), GFP_KERNEL); |
| 384 | if (!buf) { |
| 385 | pr_err("Unable to allocate fd_execute_write_same buf\n"); |
| 386 | return NULL; |
| 387 | } |
| 388 | |
| 389 | kmap_buf = kmap(sg_page(sg)) + sg->offset; |
| 390 | if (!kmap_buf) { |
| 391 | pr_err("kmap() failed in fd_setup_write_same\n"); |
| 392 | kfree(buf); |
| 393 | return NULL; |
| 394 | } |
| 395 | /* |
| 396 | * Fill local *buf to contain multiple WRITE_SAME blocks up to |
| 397 | * min(len, PAGE_SIZE) |
| 398 | */ |
| 399 | p = buf; |
| 400 | end = min_t(unsigned int, len, PAGE_SIZE); |
| 401 | |
| 402 | while (i < end) { |
| 403 | memcpy(p, kmap_buf, block_size); |
| 404 | |
| 405 | i += block_size; |
| 406 | p += block_size; |
| 407 | } |
| 408 | kunmap(sg_page(sg)); |
| 409 | |
| 410 | return buf; |
| 411 | } |
| 412 | |
| 413 | static sense_reason_t |
| 414 | fd_execute_write_same(struct se_cmd *cmd) |
| 415 | { |
| 416 | struct se_device *se_dev = cmd->se_dev; |
| 417 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 418 | struct file *f = fd_dev->fd_file; |
| 419 | struct scatterlist *sg; |
| 420 | struct iovec *iov; |
| 421 | mm_segment_t old_fs; |
Roland Dreier | 972b29c8 | 2013-02-22 09:52:57 -0800 | [diff] [blame] | 422 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 423 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
| 424 | unsigned int len, len_tmp, iov_num; |
| 425 | int i, rc; |
| 426 | unsigned char *buf; |
| 427 | |
| 428 | if (!nolb) { |
| 429 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 430 | return 0; |
| 431 | } |
| 432 | sg = &cmd->t_data_sg[0]; |
| 433 | |
| 434 | if (cmd->t_data_nents > 1 || |
| 435 | sg->length != cmd->se_dev->dev_attrib.block_size) { |
| 436 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
| 437 | " block_size: %u\n", cmd->t_data_nents, sg->length, |
| 438 | cmd->se_dev->dev_attrib.block_size); |
| 439 | return TCM_INVALID_CDB_FIELD; |
| 440 | } |
| 441 | |
| 442 | len = len_tmp = nolb * se_dev->dev_attrib.block_size; |
| 443 | iov_num = DIV_ROUND_UP(len, PAGE_SIZE); |
| 444 | |
| 445 | buf = fd_setup_write_same_buf(cmd, sg, len); |
| 446 | if (!buf) |
| 447 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 448 | |
| 449 | iov = vzalloc(sizeof(struct iovec) * iov_num); |
| 450 | if (!iov) { |
| 451 | pr_err("Unable to allocate fd_execute_write_same iovecs\n"); |
| 452 | kfree(buf); |
| 453 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 454 | } |
| 455 | /* |
| 456 | * Map the single fabric received scatterlist block now populated |
| 457 | * in *buf into each iovec for I/O submission. |
| 458 | */ |
| 459 | for (i = 0; i < iov_num; i++) { |
| 460 | iov[i].iov_base = buf; |
| 461 | iov[i].iov_len = min_t(unsigned int, len_tmp, PAGE_SIZE); |
| 462 | len_tmp -= iov[i].iov_len; |
| 463 | } |
| 464 | |
| 465 | old_fs = get_fs(); |
| 466 | set_fs(get_ds()); |
| 467 | rc = vfs_writev(f, &iov[0], iov_num, &pos); |
| 468 | set_fs(old_fs); |
| 469 | |
| 470 | vfree(iov); |
| 471 | kfree(buf); |
| 472 | |
| 473 | if (rc < 0 || rc != len) { |
| 474 | pr_err("vfs_writev() returned %d for write same\n", rc); |
| 475 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 476 | } |
| 477 | |
| 478 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 479 | return 0; |
| 480 | } |
| 481 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 482 | static sense_reason_t |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 483 | fd_execute_write_same_unmap(struct se_cmd *cmd) |
| 484 | { |
| 485 | struct se_device *se_dev = cmd->se_dev; |
| 486 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 487 | struct file *file = fd_dev->fd_file; |
| 488 | struct inode *inode = file->f_mapping->host; |
| 489 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 490 | int ret; |
| 491 | |
| 492 | if (!nolb) { |
| 493 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | if (S_ISBLK(inode->i_mode)) { |
| 498 | /* The backend is block device, use discard */ |
| 499 | struct block_device *bdev = inode->i_bdev; |
| 500 | |
| 501 | ret = blkdev_issue_discard(bdev, cmd->t_task_lba, |
| 502 | nolb, GFP_KERNEL, 0); |
| 503 | if (ret < 0) { |
| 504 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 505 | ret); |
| 506 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 507 | } |
| 508 | } else { |
| 509 | /* The backend is normal file, use fallocate */ |
| 510 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
| 511 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 512 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 513 | |
| 514 | if (!file->f_op->fallocate) |
| 515 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 516 | |
| 517 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 518 | if (ret < 0) { |
| 519 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 520 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | target_complete_cmd(cmd, GOOD); |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | static sense_reason_t |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame^] | 529 | fd_execute_unmap(struct se_cmd *cmd) |
| 530 | { |
| 531 | struct se_device *dev = cmd->se_dev; |
| 532 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 533 | struct file *file = fd_dev->fd_file; |
| 534 | struct inode *inode = file->f_mapping->host; |
| 535 | unsigned char *buf, *ptr = NULL; |
| 536 | sector_t lba; |
| 537 | int size; |
| 538 | u32 range; |
| 539 | sense_reason_t ret = 0; |
| 540 | int dl, bd_dl, err; |
| 541 | |
| 542 | /* We never set ANC_SUP */ |
| 543 | if (cmd->t_task_cdb[1]) |
| 544 | return TCM_INVALID_CDB_FIELD; |
| 545 | |
| 546 | if (cmd->data_length == 0) { |
| 547 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | if (cmd->data_length < 8) { |
| 552 | pr_warn("UNMAP parameter list length %u too small\n", |
| 553 | cmd->data_length); |
| 554 | return TCM_PARAMETER_LIST_LENGTH_ERROR; |
| 555 | } |
| 556 | |
| 557 | buf = transport_kmap_data_sg(cmd); |
| 558 | if (!buf) |
| 559 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 560 | |
| 561 | dl = get_unaligned_be16(&buf[0]); |
| 562 | bd_dl = get_unaligned_be16(&buf[2]); |
| 563 | |
| 564 | size = cmd->data_length - 8; |
| 565 | if (bd_dl > size) |
| 566 | pr_warn("UNMAP parameter list length %u too small, ignoring bd_dl %u\n", |
| 567 | cmd->data_length, bd_dl); |
| 568 | else |
| 569 | size = bd_dl; |
| 570 | |
| 571 | if (size / 16 > dev->dev_attrib.max_unmap_block_desc_count) { |
| 572 | ret = TCM_INVALID_PARAMETER_LIST; |
| 573 | goto err; |
| 574 | } |
| 575 | |
| 576 | /* First UNMAP block descriptor starts at 8 byte offset */ |
| 577 | ptr = &buf[8]; |
| 578 | pr_debug("UNMAP: Sub: %s Using dl: %u bd_dl: %u size: %u" |
| 579 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
| 580 | |
| 581 | while (size >= 16) { |
| 582 | lba = get_unaligned_be64(&ptr[0]); |
| 583 | range = get_unaligned_be32(&ptr[8]); |
| 584 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
| 585 | (unsigned long long)lba, range); |
| 586 | |
| 587 | if (range > dev->dev_attrib.max_unmap_lba_count) { |
| 588 | ret = TCM_INVALID_PARAMETER_LIST; |
| 589 | goto err; |
| 590 | } |
| 591 | |
| 592 | if (lba + range > dev->transport->get_blocks(dev) + 1) { |
| 593 | ret = TCM_ADDRESS_OUT_OF_RANGE; |
| 594 | goto err; |
| 595 | } |
| 596 | |
| 597 | if (S_ISBLK(inode->i_mode)) { |
| 598 | /* The backend is block device, use discard */ |
| 599 | struct block_device *bdev = inode->i_bdev; |
| 600 | |
| 601 | err = blkdev_issue_discard(bdev, lba, range, GFP_KERNEL, 0); |
| 602 | if (err < 0) { |
| 603 | pr_err("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 604 | err); |
| 605 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 606 | goto err; |
| 607 | } |
| 608 | } else { |
| 609 | /* The backend is normal file, use fallocate */ |
| 610 | loff_t pos = lba * dev->dev_attrib.block_size; |
| 611 | unsigned int len = range * dev->dev_attrib.block_size; |
| 612 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 613 | |
| 614 | if (!file->f_op->fallocate) { |
| 615 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 616 | goto err; |
| 617 | } |
| 618 | err = file->f_op->fallocate(file, mode, pos, len); |
| 619 | if (err < 0) { |
| 620 | pr_warn("FILEIO: fallocate() failed: %d\n", err); |
| 621 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 622 | goto err; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | ptr += 16; |
| 627 | size -= 16; |
| 628 | } |
| 629 | |
| 630 | err: |
| 631 | transport_kunmap_data_sg(cmd); |
| 632 | if (!ret) |
| 633 | target_complete_cmd(cmd, GOOD); |
| 634 | return ret; |
| 635 | } |
| 636 | |
| 637 | static sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 638 | fd_execute_rw(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 639 | { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 640 | struct scatterlist *sgl = cmd->t_data_sg; |
| 641 | u32 sgl_nents = cmd->t_data_nents; |
| 642 | enum dma_data_direction data_direction = cmd->data_direction; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 643 | struct se_device *dev = cmd->se_dev; |
| 644 | int ret = 0; |
| 645 | |
| 646 | /* |
| 647 | * Call vectorized fileio functions to map struct scatterlist |
| 648 | * physical memory addresses to struct iovec virtual memory. |
| 649 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 650 | if (data_direction == DMA_FROM_DEVICE) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 651 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 653 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 654 | /* |
| 655 | * Perform implict vfs_fsync_range() for fd_do_writev() ops |
| 656 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 657 | * Allow this to happen independent of WCE=0 setting. |
| 658 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 659 | if (ret > 0 && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 660 | dev->dev_attrib.emulate_fua_write > 0 && |
Christoph Hellwig | 2d3a4b5 | 2011-11-14 11:36:29 -0500 | [diff] [blame] | 661 | (cmd->se_cmd_flags & SCF_FUA)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 662 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 663 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 664 | dev->dev_attrib.block_size; |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 665 | loff_t end = start + cmd->data_length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 666 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 667 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 668 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 669 | } |
| 670 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 671 | if (ret < 0) |
| 672 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 673 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 674 | if (ret) |
| 675 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 676 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 677 | } |
| 678 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 679 | enum { |
| 680 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err |
| 681 | }; |
| 682 | |
| 683 | static match_table_t tokens = { |
| 684 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 685 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 686 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 687 | {Opt_err, NULL} |
| 688 | }; |
| 689 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 690 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 691 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 692 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 693 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | char *orig, *ptr, *arg_p, *opts; |
| 695 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 696 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 697 | |
| 698 | opts = kstrdup(page, GFP_KERNEL); |
| 699 | if (!opts) |
| 700 | return -ENOMEM; |
| 701 | |
| 702 | orig = opts; |
| 703 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 704 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 705 | if (!*ptr) |
| 706 | continue; |
| 707 | |
| 708 | token = match_token(ptr, tokens, args); |
| 709 | switch (token) { |
| 710 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 711 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 712 | FD_MAX_DEV_NAME) == 0) { |
| 713 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 714 | break; |
| 715 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 716 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 717 | fd_dev->fd_dev_name); |
| 718 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 719 | break; |
| 720 | case Opt_fd_dev_size: |
| 721 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 722 | if (!arg_p) { |
| 723 | ret = -ENOMEM; |
| 724 | break; |
| 725 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 726 | ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 727 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 728 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 729 | pr_err("strict_strtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 730 | " fd_dev_size=\n"); |
| 731 | goto out; |
| 732 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 733 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 734 | " bytes\n", fd_dev->fd_dev_size); |
| 735 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 736 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 737 | case Opt_fd_buffered_io: |
| 738 | match_int(args, &arg); |
| 739 | if (arg != 1) { |
| 740 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 741 | ret = -EINVAL; |
| 742 | goto out; |
| 743 | } |
| 744 | |
| 745 | pr_debug("FILEIO: Using buffered I/O" |
| 746 | " operations for struct fd_dev\n"); |
| 747 | |
| 748 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 749 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 750 | default: |
| 751 | break; |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | out: |
| 756 | kfree(orig); |
| 757 | return (!ret) ? count : ret; |
| 758 | } |
| 759 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 760 | 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] | 761 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 762 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 763 | ssize_t bl = 0; |
| 764 | |
| 765 | 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] | 766 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
| 767 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 768 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
| 769 | "Buffered-WCE" : "O_DSYNC"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 770 | return bl; |
| 771 | } |
| 772 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 773 | static sector_t fd_get_blocks(struct se_device *dev) |
| 774 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 775 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 776 | struct file *f = fd_dev->fd_file; |
| 777 | struct inode *i = f->f_mapping->host; |
| 778 | unsigned long long dev_size; |
| 779 | /* |
| 780 | * When using a file that references an underlying struct block_device, |
| 781 | * ensure dev_size is always based on the current inode size in order |
| 782 | * to handle underlying block_device resize operations. |
| 783 | */ |
| 784 | if (S_ISBLK(i->i_mode)) |
| 785 | dev_size = (i_size_read(i) - fd_dev->fd_block_size); |
| 786 | else |
| 787 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 788 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 789 | return div_u64(dev_size, dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 790 | } |
| 791 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 792 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 793 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 794 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 795 | .execute_write_same = fd_execute_write_same, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 796 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame^] | 797 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 798 | }; |
| 799 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 800 | static sense_reason_t |
| 801 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 802 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 803 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 804 | } |
| 805 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 806 | static struct se_subsystem_api fileio_template = { |
| 807 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 808 | .inquiry_prod = "FILEIO", |
| 809 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 810 | .owner = THIS_MODULE, |
| 811 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
| 812 | .attach_hba = fd_attach_hba, |
| 813 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 814 | .alloc_device = fd_alloc_device, |
| 815 | .configure_device = fd_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 816 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 817 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 818 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 819 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 820 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 821 | .get_blocks = fd_get_blocks, |
| 822 | }; |
| 823 | |
| 824 | static int __init fileio_module_init(void) |
| 825 | { |
| 826 | return transport_subsystem_register(&fileio_template); |
| 827 | } |
| 828 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 829 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 830 | { |
| 831 | transport_subsystem_release(&fileio_template); |
| 832 | } |
| 833 | |
| 834 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 835 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 836 | MODULE_LICENSE("GPL"); |
| 837 | |
| 838 | module_init(fileio_module_init); |
| 839 | module_exit(fileio_module_exit); |