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 | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 40 | #include <target/target_core_backend_configfs.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | |
| 42 | #include "target_core_file.h" |
| 43 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 44 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
| 45 | { |
| 46 | return container_of(dev, struct fd_dev, dev); |
| 47 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 48 | |
| 49 | /* fd_attach_hba(): (Part of se_subsystem_api_t template) |
| 50 | * |
| 51 | * |
| 52 | */ |
| 53 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
| 54 | { |
| 55 | struct fd_host *fd_host; |
| 56 | |
| 57 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 58 | if (!fd_host) { |
| 59 | pr_err("Unable to allocate memory for struct fd_host\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 60 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | fd_host->fd_host_id = host_id; |
| 64 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 65 | hba->hba_ptr = fd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 66 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 67 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 68 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
| 69 | TARGET_CORE_MOD_VERSION); |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 70 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
| 71 | hba->hba_id, fd_host->fd_host_id); |
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 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 156 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 157 | /* |
| 158 | * Determine the number of bytes from i_size_read() minus |
| 159 | * one (1) logical sector from underlying struct block_device |
| 160 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 161 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 162 | fd_dev->fd_block_size); |
| 163 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 164 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 165 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 166 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 167 | fd_dev->fd_block_size); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 168 | /* |
| 169 | * Check if the underlying struct block_device request_queue supports |
| 170 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| 171 | * in ATA and we need to set TPE=1 |
| 172 | */ |
| 173 | if (blk_queue_discard(q)) { |
| 174 | dev->dev_attrib.max_unmap_lba_count = |
| 175 | q->limits.max_discard_sectors; |
| 176 | /* |
| 177 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 178 | */ |
| 179 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 180 | dev->dev_attrib.unmap_granularity = |
| 181 | q->limits.discard_granularity >> 9; |
| 182 | dev->dev_attrib.unmap_granularity_alignment = |
| 183 | q->limits.discard_alignment; |
| 184 | pr_debug("IFILE: BLOCK Discard support available," |
| 185 | " disabled by default\n"); |
| 186 | } |
| 187 | /* |
| 188 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 189 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 190 | */ |
| 191 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Asias He | 0463a3f | 2013-04-24 19:38:11 -0700 | [diff] [blame] | 192 | |
| 193 | if (blk_queue_nonrot(q)) |
| 194 | dev->dev_attrib.is_nonrot = 1; |
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 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 203 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 204 | /* |
| 205 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 206 | */ |
| 207 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 208 | /* |
| 209 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 210 | */ |
| 211 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 212 | dev->dev_attrib.unmap_granularity = 1; |
| 213 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 214 | |
| 215 | /* |
| 216 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 217 | * based upon struct iovec limit for vfs_writev() |
| 218 | */ |
| 219 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 220 | } |
| 221 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 222 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 223 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
| 224 | 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] | 225 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 226 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 227 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 228 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" |
| 229 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 230 | dev->dev_attrib.emulate_write_cache = 1; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 231 | } |
| 232 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 233 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
| 234 | fd_dev->fd_queue_depth = dev->queue_depth; |
| 235 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 236 | 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] | 237 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
| 238 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); |
| 239 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 240 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 241 | fail: |
| 242 | if (fd_dev->fd_file) { |
| 243 | filp_close(fd_dev->fd_file, NULL); |
| 244 | fd_dev->fd_file = NULL; |
| 245 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 246 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 247 | } |
| 248 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 249 | static void fd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 250 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 251 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 252 | |
| 253 | if (fd_dev->fd_file) { |
| 254 | filp_close(fd_dev->fd_file, NULL); |
| 255 | fd_dev->fd_file = NULL; |
| 256 | } |
| 257 | |
| 258 | kfree(fd_dev); |
| 259 | } |
| 260 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 261 | static int fd_do_prot_rw(struct se_cmd *cmd, struct fd_prot *fd_prot, |
| 262 | int is_write) |
| 263 | { |
| 264 | struct se_device *se_dev = cmd->se_dev; |
| 265 | struct fd_dev *dev = FD_DEV(se_dev); |
| 266 | struct file *prot_fd = dev->fd_prot_file; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 267 | loff_t pos = (cmd->t_task_lba * se_dev->prot_length); |
| 268 | unsigned char *buf; |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 269 | u32 prot_size; |
| 270 | int rc, ret = 1; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 271 | |
| 272 | prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * |
| 273 | se_dev->prot_length; |
| 274 | |
| 275 | if (!is_write) { |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 276 | fd_prot->prot_buf = kzalloc(prot_size, GFP_KERNEL); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 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 | |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 283 | fd_prot->prot_sg_nents = 1; |
| 284 | fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist), |
| 285 | GFP_KERNEL); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 286 | if (!fd_prot->prot_sg) { |
| 287 | pr_err("Unable to allocate fd_prot->prot_sg\n"); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 288 | kfree(fd_prot->prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 289 | return -ENOMEM; |
| 290 | } |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 291 | sg_init_table(fd_prot->prot_sg, fd_prot->prot_sg_nents); |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 292 | sg_set_buf(fd_prot->prot_sg, buf, prot_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | if (is_write) { |
| 296 | rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); |
| 297 | if (rc < 0 || prot_size != rc) { |
| 298 | pr_err("kernel_write() for fd_do_prot_rw failed:" |
| 299 | " %d\n", rc); |
| 300 | ret = -EINVAL; |
| 301 | } |
| 302 | } else { |
| 303 | rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); |
| 304 | if (rc < 0) { |
| 305 | pr_err("kernel_read() for fd_do_prot_rw failed:" |
| 306 | " %d\n", rc); |
| 307 | ret = -EINVAL; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | if (is_write || ret < 0) { |
| 312 | kfree(fd_prot->prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 313 | kfree(fd_prot->prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 314 | } |
| 315 | |
| 316 | return ret; |
| 317 | } |
| 318 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 319 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
| 320 | u32 sgl_nents, int is_write) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 321 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 322 | struct se_device *se_dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 323 | struct fd_dev *dev = FD_DEV(se_dev); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 324 | struct file *fd = dev->fd_file; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 325 | struct scatterlist *sg; |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 326 | struct iov_iter iter; |
| 327 | struct bio_vec *bvec; |
| 328 | ssize_t len = 0; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 329 | 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] | 330 | int ret = 0, i; |
| 331 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 332 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
| 333 | if (!bvec) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 334 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 335 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 336 | } |
| 337 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 338 | for_each_sg(sgl, sg, sgl_nents, i) { |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 339 | bvec[i].bv_page = sg_page(sg); |
| 340 | bvec[i].bv_len = sg->length; |
| 341 | bvec[i].bv_offset = sg->offset; |
| 342 | |
| 343 | len += sg->length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 344 | } |
| 345 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 346 | iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 347 | if (is_write) |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 348 | ret = vfs_iter_write(fd, &iter, &pos); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 349 | else |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 350 | ret = vfs_iter_read(fd, &iter, &pos); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 351 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 352 | kfree(bvec); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 353 | |
| 354 | if (is_write) { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 355 | if (ret < 0 || ret != cmd->data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 356 | pr_err("%s() write returned %d\n", __func__, ret); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 357 | return (ret < 0 ? ret : -EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 358 | } |
| 359 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 360 | /* |
| 361 | * Return zeros and GOOD status even if the READ did not return |
| 362 | * the expected virt_size for struct file w/o a backing struct |
| 363 | * block_device. |
| 364 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 365 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 366 | if (ret < 0 || ret != cmd->data_length) { |
| 367 | pr_err("%s() returned %d, expecting %u for " |
| 368 | "S_ISBLK\n", __func__, ret, |
| 369 | cmd->data_length); |
| 370 | return (ret < 0 ? ret : -EINVAL); |
| 371 | } |
| 372 | } else { |
| 373 | if (ret < 0) { |
| 374 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 375 | __func__, ret); |
| 376 | return ret; |
| 377 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | } |
| 379 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 380 | return 1; |
| 381 | } |
| 382 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 383 | static sense_reason_t |
| 384 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 385 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 387 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 388 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | loff_t start, end; |
| 390 | int ret; |
| 391 | |
| 392 | /* |
| 393 | * If the Immediate bit is set, queue up the GOOD response |
| 394 | * for this SYNCHRONIZE_CACHE op |
| 395 | */ |
| 396 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 397 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 398 | |
| 399 | /* |
| 400 | * Determine if we will be flushing the entire device. |
| 401 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 402 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 403 | start = 0; |
| 404 | end = LLONG_MAX; |
| 405 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 406 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 407 | if (cmd->data_length) |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 408 | end = start + cmd->data_length - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 409 | else |
| 410 | end = LLONG_MAX; |
| 411 | } |
| 412 | |
| 413 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 414 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 415 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 416 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 417 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 418 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 419 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 420 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 421 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 422 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 423 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 424 | |
| 425 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | } |
| 427 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 428 | static sense_reason_t |
| 429 | fd_execute_write_same(struct se_cmd *cmd) |
| 430 | { |
| 431 | struct se_device *se_dev = cmd->se_dev; |
| 432 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 433 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 434 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 435 | struct iov_iter iter; |
| 436 | struct bio_vec *bvec; |
| 437 | unsigned int len = 0, i; |
| 438 | ssize_t ret; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 439 | |
| 440 | if (!nolb) { |
| 441 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 442 | return 0; |
| 443 | } |
Nicholas Bellinger | afd73f1 | 2015-02-14 01:32:11 +0000 | [diff] [blame] | 444 | if (cmd->prot_op) { |
| 445 | pr_err("WRITE_SAME: Protection information with FILEIO" |
| 446 | " backends not supported\n"); |
| 447 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 448 | } |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 449 | |
| 450 | if (cmd->t_data_nents > 1 || |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 451 | cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 452 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 453 | " block_size: %u\n", |
| 454 | cmd->t_data_nents, |
| 455 | cmd->t_data_sg[0].length, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 456 | cmd->se_dev->dev_attrib.block_size); |
| 457 | return TCM_INVALID_CDB_FIELD; |
| 458 | } |
| 459 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 460 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
| 461 | if (!bvec) |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 462 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 463 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 464 | for (i = 0; i < nolb; i++) { |
| 465 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); |
| 466 | bvec[i].bv_len = cmd->t_data_sg[0].length; |
| 467 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; |
| 468 | |
| 469 | len += se_dev->dev_attrib.block_size; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 470 | } |
| 471 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 472 | iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); |
| 473 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 474 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 475 | kfree(bvec); |
| 476 | if (ret < 0 || ret != len) { |
| 477 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 478 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 479 | } |
| 480 | |
| 481 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 482 | return 0; |
| 483 | } |
| 484 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 485 | static int |
| 486 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, |
| 487 | void *buf, size_t bufsize) |
| 488 | { |
| 489 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 490 | struct file *prot_fd = fd_dev->fd_prot_file; |
| 491 | sector_t prot_length, prot; |
| 492 | loff_t pos = lba * se_dev->prot_length; |
| 493 | |
| 494 | if (!prot_fd) { |
| 495 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); |
| 496 | return -ENODEV; |
| 497 | } |
| 498 | |
| 499 | prot_length = nolb * se_dev->prot_length; |
| 500 | |
| 501 | for (prot = 0; prot < prot_length;) { |
| 502 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); |
| 503 | ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot); |
| 504 | |
| 505 | if (ret != len) { |
| 506 | pr_err("vfs_write to prot file failed: %zd\n", ret); |
| 507 | return ret < 0 ? ret : -ENODEV; |
| 508 | } |
| 509 | prot += ret; |
| 510 | } |
| 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | static int |
| 516 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
| 517 | { |
| 518 | void *buf; |
| 519 | int rc; |
| 520 | |
| 521 | buf = (void *)__get_free_page(GFP_KERNEL); |
| 522 | if (!buf) { |
| 523 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 524 | return -ENOMEM; |
| 525 | } |
| 526 | memset(buf, 0xff, PAGE_SIZE); |
| 527 | |
| 528 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); |
| 529 | |
| 530 | free_page((unsigned long)buf); |
| 531 | |
| 532 | return rc; |
| 533 | } |
| 534 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 535 | static sense_reason_t |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 536 | 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] | 537 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 538 | struct file *file = priv; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 539 | struct inode *inode = file->f_mapping->host; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 540 | int ret; |
| 541 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 542 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
| 543 | ret = fd_do_prot_unmap(cmd, lba, nolb); |
| 544 | if (ret) |
| 545 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 546 | } |
| 547 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 548 | if (S_ISBLK(inode->i_mode)) { |
| 549 | /* The backend is block device, use discard */ |
| 550 | struct block_device *bdev = inode->i_bdev; |
| 551 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 552 | ret = blkdev_issue_discard(bdev, lba, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 553 | nolb, GFP_KERNEL, 0); |
| 554 | if (ret < 0) { |
| 555 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 556 | ret); |
| 557 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 558 | } |
| 559 | } else { |
| 560 | /* The backend is normal file, use fallocate */ |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 561 | struct se_device *se_dev = cmd->se_dev; |
| 562 | loff_t pos = lba * se_dev->dev_attrib.block_size; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 563 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 564 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 565 | |
| 566 | if (!file->f_op->fallocate) |
| 567 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 568 | |
| 569 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 570 | if (ret < 0) { |
| 571 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 572 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 573 | } |
| 574 | } |
| 575 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static sense_reason_t |
| 580 | fd_execute_write_same_unmap(struct se_cmd *cmd) |
| 581 | { |
| 582 | struct se_device *se_dev = cmd->se_dev; |
| 583 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 584 | struct file *file = fd_dev->fd_file; |
| 585 | sector_t lba = cmd->t_task_lba; |
| 586 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
Christoph Hellwig | 3abff1e | 2015-03-26 12:27:35 +0100 | [diff] [blame] | 587 | sense_reason_t ret; |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 588 | |
| 589 | if (!nolb) { |
| 590 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | ret = fd_do_unmap(cmd, file, lba, nolb); |
| 595 | if (ret) |
| 596 | return ret; |
| 597 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 598 | target_complete_cmd(cmd, GOOD); |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | static sense_reason_t |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 603 | fd_execute_unmap(struct se_cmd *cmd) |
| 604 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 605 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 606 | |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 607 | return sbc_execute_unmap(cmd, fd_do_unmap, file); |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | static sense_reason_t |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 611 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 612 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 613 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 614 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 615 | struct fd_prot fd_prot; |
| 616 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 617 | int ret = 0; |
Nicholas Bellinger | 046ba64 | 2015-01-06 16:10:37 -0800 | [diff] [blame] | 618 | /* |
| 619 | * We are currently limited by the number of iovecs (2048) per |
| 620 | * single vfs_[writev,readv] call. |
| 621 | */ |
| 622 | if (cmd->data_length > FD_MAX_BYTES) { |
| 623 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" |
| 624 | "FD_MAX_BYTES: %u iovec count limitiation\n", |
| 625 | cmd->data_length, FD_MAX_BYTES); |
| 626 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 627 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 628 | /* |
| 629 | * Call vectorized fileio functions to map struct scatterlist |
| 630 | * physical memory addresses to struct iovec virtual memory. |
| 631 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 632 | if (data_direction == DMA_FROM_DEVICE) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 633 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 634 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 635 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 636 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 637 | if (ret < 0) |
| 638 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 639 | } |
| 640 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 641 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 642 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 643 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 644 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 645 | |
| 646 | rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, |
| 647 | 0, fd_prot.prot_sg, 0); |
| 648 | if (rc) { |
| 649 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 650 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 651 | return rc; |
| 652 | } |
| 653 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 654 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 655 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 656 | } else { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 657 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 658 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 659 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 660 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 661 | |
| 662 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 663 | if (ret < 0) |
| 664 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 665 | |
| 666 | rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, |
| 667 | 0, fd_prot.prot_sg, 0); |
| 668 | if (rc) { |
| 669 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 670 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 671 | return rc; |
| 672 | } |
| 673 | } |
| 674 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 675 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 676 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 677 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 678 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 679 | * Allow this to happen independent of WCE=0 setting. |
| 680 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 681 | if (ret > 0 && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 682 | dev->dev_attrib.emulate_fua_write > 0 && |
Christoph Hellwig | 2d3a4b5 | 2011-11-14 11:36:29 -0500 | [diff] [blame] | 683 | (cmd->se_cmd_flags & SCF_FUA)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 684 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 685 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 686 | dev->dev_attrib.block_size; |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 687 | loff_t end; |
| 688 | |
| 689 | if (cmd->data_length) |
| 690 | end = start + cmd->data_length - 1; |
| 691 | else |
| 692 | end = LLONG_MAX; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 693 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 694 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 695 | } |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 696 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 697 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 698 | ret = fd_do_prot_rw(cmd, &fd_prot, true); |
| 699 | if (ret < 0) |
| 700 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 701 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 702 | } |
| 703 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 704 | if (ret < 0) { |
| 705 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 706 | kfree(fd_prot.prot_buf); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 707 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 708 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 709 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 710 | if (ret) |
| 711 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 712 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 713 | } |
| 714 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 715 | enum { |
| 716 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err |
| 717 | }; |
| 718 | |
| 719 | static match_table_t tokens = { |
| 720 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 721 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 722 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 723 | {Opt_err, NULL} |
| 724 | }; |
| 725 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 726 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 727 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 728 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 729 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 730 | char *orig, *ptr, *arg_p, *opts; |
| 731 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 732 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 733 | |
| 734 | opts = kstrdup(page, GFP_KERNEL); |
| 735 | if (!opts) |
| 736 | return -ENOMEM; |
| 737 | |
| 738 | orig = opts; |
| 739 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 740 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 741 | if (!*ptr) |
| 742 | continue; |
| 743 | |
| 744 | token = match_token(ptr, tokens, args); |
| 745 | switch (token) { |
| 746 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 747 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 748 | FD_MAX_DEV_NAME) == 0) { |
| 749 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 750 | break; |
| 751 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 752 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 753 | fd_dev->fd_dev_name); |
| 754 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 755 | break; |
| 756 | case Opt_fd_dev_size: |
| 757 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 758 | if (!arg_p) { |
| 759 | ret = -ENOMEM; |
| 760 | break; |
| 761 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 762 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 763 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 764 | if (ret < 0) { |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 765 | pr_err("kstrtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 766 | " fd_dev_size=\n"); |
| 767 | goto out; |
| 768 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 769 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 770 | " bytes\n", fd_dev->fd_dev_size); |
| 771 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 772 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 773 | case Opt_fd_buffered_io: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 774 | ret = match_int(args, &arg); |
| 775 | if (ret) |
| 776 | goto out; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 777 | if (arg != 1) { |
| 778 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 779 | ret = -EINVAL; |
| 780 | goto out; |
| 781 | } |
| 782 | |
| 783 | pr_debug("FILEIO: Using buffered I/O" |
| 784 | " operations for struct fd_dev\n"); |
| 785 | |
| 786 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 787 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 788 | default: |
| 789 | break; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | out: |
| 794 | kfree(orig); |
| 795 | return (!ret) ? count : ret; |
| 796 | } |
| 797 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 798 | 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] | 799 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 800 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 801 | ssize_t bl = 0; |
| 802 | |
| 803 | 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] | 804 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
| 805 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 806 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
| 807 | "Buffered-WCE" : "O_DSYNC"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 808 | return bl; |
| 809 | } |
| 810 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 811 | static sector_t fd_get_blocks(struct se_device *dev) |
| 812 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 813 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 814 | struct file *f = fd_dev->fd_file; |
| 815 | struct inode *i = f->f_mapping->host; |
| 816 | unsigned long long dev_size; |
| 817 | /* |
| 818 | * When using a file that references an underlying struct block_device, |
| 819 | * ensure dev_size is always based on the current inode size in order |
| 820 | * to handle underlying block_device resize operations. |
| 821 | */ |
| 822 | if (S_ISBLK(i->i_mode)) |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 823 | dev_size = i_size_read(i); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 824 | else |
| 825 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 826 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 827 | return div_u64(dev_size - dev->dev_attrib.block_size, |
| 828 | dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 829 | } |
| 830 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 831 | static int fd_init_prot(struct se_device *dev) |
| 832 | { |
| 833 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 834 | struct file *prot_file, *file = fd_dev->fd_file; |
| 835 | struct inode *inode; |
| 836 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
| 837 | char buf[FD_MAX_DEV_PROT_NAME]; |
| 838 | |
| 839 | if (!file) { |
| 840 | pr_err("Unable to locate fd_dev->fd_file\n"); |
| 841 | return -ENODEV; |
| 842 | } |
| 843 | |
| 844 | inode = file->f_mapping->host; |
| 845 | if (S_ISBLK(inode->i_mode)) { |
| 846 | pr_err("FILEIO Protection emulation only supported on" |
| 847 | " !S_ISBLK\n"); |
| 848 | return -ENOSYS; |
| 849 | } |
| 850 | |
| 851 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) |
| 852 | flags &= ~O_DSYNC; |
| 853 | |
| 854 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", |
| 855 | fd_dev->fd_dev_name); |
| 856 | |
| 857 | prot_file = filp_open(buf, flags, 0600); |
| 858 | if (IS_ERR(prot_file)) { |
| 859 | pr_err("filp_open(%s) failed\n", buf); |
| 860 | ret = PTR_ERR(prot_file); |
| 861 | return ret; |
| 862 | } |
| 863 | fd_dev->fd_prot_file = prot_file; |
| 864 | |
| 865 | return 0; |
| 866 | } |
| 867 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 868 | static int fd_format_prot(struct se_device *dev) |
| 869 | { |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 870 | unsigned char *buf; |
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; |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 872 | int ret; |
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 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 878 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 879 | buf = vzalloc(unit_size); |
| 880 | if (!buf) { |
| 881 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 882 | return -ENOMEM; |
| 883 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 884 | |
| 885 | pr_debug("Using FILEIO prot_length: %llu\n", |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 886 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
| 887 | dev->prot_length); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 888 | |
Sagi Grimberg | 80dcd0c | 2014-02-19 17:50:16 +0200 | [diff] [blame] | 889 | memset(buf, 0xff, unit_size); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 890 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
| 891 | buf, unit_size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 892 | vfree(buf); |
| 893 | return ret; |
| 894 | } |
| 895 | |
| 896 | static void fd_free_prot(struct se_device *dev) |
| 897 | { |
| 898 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 899 | |
| 900 | if (!fd_dev->fd_prot_file) |
| 901 | return; |
| 902 | |
| 903 | filp_close(fd_dev->fd_prot_file, NULL); |
| 904 | fd_dev->fd_prot_file = NULL; |
| 905 | } |
| 906 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 907 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 908 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 909 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 910 | .execute_write_same = fd_execute_write_same, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 911 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 912 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 913 | }; |
| 914 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 915 | static sense_reason_t |
| 916 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 917 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 918 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 919 | } |
| 920 | |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 921 | DEF_TB_DEFAULT_ATTRIBS(fileio); |
| 922 | |
| 923 | static struct configfs_attribute *fileio_backend_dev_attrs[] = { |
| 924 | &fileio_dev_attrib_emulate_model_alias.attr, |
| 925 | &fileio_dev_attrib_emulate_dpo.attr, |
| 926 | &fileio_dev_attrib_emulate_fua_write.attr, |
| 927 | &fileio_dev_attrib_emulate_fua_read.attr, |
| 928 | &fileio_dev_attrib_emulate_write_cache.attr, |
| 929 | &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr, |
| 930 | &fileio_dev_attrib_emulate_tas.attr, |
| 931 | &fileio_dev_attrib_emulate_tpu.attr, |
| 932 | &fileio_dev_attrib_emulate_tpws.attr, |
| 933 | &fileio_dev_attrib_emulate_caw.attr, |
| 934 | &fileio_dev_attrib_emulate_3pc.attr, |
| 935 | &fileio_dev_attrib_pi_prot_type.attr, |
| 936 | &fileio_dev_attrib_hw_pi_prot_type.attr, |
| 937 | &fileio_dev_attrib_pi_prot_format.attr, |
| 938 | &fileio_dev_attrib_enforce_pr_isids.attr, |
| 939 | &fileio_dev_attrib_is_nonrot.attr, |
| 940 | &fileio_dev_attrib_emulate_rest_reord.attr, |
| 941 | &fileio_dev_attrib_force_pr_aptpl.attr, |
| 942 | &fileio_dev_attrib_hw_block_size.attr, |
| 943 | &fileio_dev_attrib_block_size.attr, |
| 944 | &fileio_dev_attrib_hw_max_sectors.attr, |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 945 | &fileio_dev_attrib_optimal_sectors.attr, |
| 946 | &fileio_dev_attrib_hw_queue_depth.attr, |
| 947 | &fileio_dev_attrib_queue_depth.attr, |
| 948 | &fileio_dev_attrib_max_unmap_lba_count.attr, |
| 949 | &fileio_dev_attrib_max_unmap_block_desc_count.attr, |
| 950 | &fileio_dev_attrib_unmap_granularity.attr, |
| 951 | &fileio_dev_attrib_unmap_granularity_alignment.attr, |
| 952 | &fileio_dev_attrib_max_write_same_len.attr, |
| 953 | NULL, |
| 954 | }; |
| 955 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 956 | static struct se_subsystem_api fileio_template = { |
| 957 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 958 | .inquiry_prod = "FILEIO", |
| 959 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 960 | .owner = THIS_MODULE, |
| 961 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
| 962 | .attach_hba = fd_attach_hba, |
| 963 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 964 | .alloc_device = fd_alloc_device, |
| 965 | .configure_device = fd_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 966 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 967 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 968 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 969 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 970 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 971 | .get_blocks = fd_get_blocks, |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 972 | .init_prot = fd_init_prot, |
| 973 | .format_prot = fd_format_prot, |
| 974 | .free_prot = fd_free_prot, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 975 | }; |
| 976 | |
| 977 | static int __init fileio_module_init(void) |
| 978 | { |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 979 | struct target_backend_cits *tbc = &fileio_template.tb_cits; |
| 980 | |
| 981 | target_core_setup_sub_cits(&fileio_template); |
| 982 | tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs; |
| 983 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 984 | return transport_subsystem_register(&fileio_template); |
| 985 | } |
| 986 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 987 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 988 | { |
| 989 | transport_subsystem_release(&fileio_template); |
| 990 | } |
| 991 | |
| 992 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 993 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 994 | MODULE_LICENSE("GPL"); |
| 995 | |
| 996 | module_init(fileio_module_init); |
| 997 | module_exit(fileio_module_exit); |