Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_file.c |
| 3 | * |
| 4 | * This file contains the Storage Engine <-> FILEIO transport specific functions |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2005-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | * |
| 24 | ******************************************************************************/ |
| 25 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 26 | #include <linux/string.h> |
| 27 | #include <linux/parser.h> |
| 28 | #include <linux/timer.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/spinlock.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 32 | #include <linux/module.h> |
David S. Miller | 5538d29 | 2015-05-28 11:35:41 -0700 | [diff] [blame^] | 33 | #include <linux/vmalloc.h> |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 34 | #include <linux/falloc.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 35 | #include <scsi/scsi.h> |
| 36 | #include <scsi/scsi_host.h> |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 37 | #include <asm/unaligned.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 38 | |
| 39 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 40 | #include <target/target_core_backend.h> |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 41 | #include <target/target_core_backend_configfs.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 42 | |
| 43 | #include "target_core_file.h" |
| 44 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 45 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
| 46 | { |
| 47 | return container_of(dev, struct fd_dev, dev); |
| 48 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | |
| 50 | /* fd_attach_hba(): (Part of se_subsystem_api_t template) |
| 51 | * |
| 52 | * |
| 53 | */ |
| 54 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
| 55 | { |
| 56 | struct fd_host *fd_host; |
| 57 | |
| 58 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 59 | if (!fd_host) { |
| 60 | pr_err("Unable to allocate memory for struct fd_host\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 61 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | fd_host->fd_host_id = host_id; |
| 65 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 66 | hba->hba_ptr = fd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 68 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 69 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
| 70 | TARGET_CORE_MOD_VERSION); |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 71 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
| 72 | hba->hba_id, fd_host->fd_host_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static void fd_detach_hba(struct se_hba *hba) |
| 78 | { |
| 79 | struct fd_host *fd_host = hba->hba_ptr; |
| 80 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 81 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 82 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
| 83 | |
| 84 | kfree(fd_host); |
| 85 | hba->hba_ptr = NULL; |
| 86 | } |
| 87 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 88 | 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] | 89 | { |
| 90 | struct fd_dev *fd_dev; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 91 | struct fd_host *fd_host = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 92 | |
| 93 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 94 | if (!fd_dev) { |
| 95 | pr_err("Unable to allocate memory for struct fd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | return NULL; |
| 97 | } |
| 98 | |
| 99 | fd_dev->fd_host = fd_host; |
| 100 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 101 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 102 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 103 | return &fd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 104 | } |
| 105 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 106 | static int fd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 107 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 108 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 109 | struct fd_host *fd_host = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | struct file *file; |
| 111 | struct inode *inode = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 112 | int flags, ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 113 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 114 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
| 115 | pr_err("Missing fd_dev_name=\n"); |
| 116 | return -EINVAL; |
| 117 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 118 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 119 | /* |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 120 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
| 121 | * of pure timestamp updates. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 122 | */ |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 123 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 124 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 125 | /* |
| 126 | * Optionally allow fd_buffered_io=1 to be enabled for people |
| 127 | * who want use the fs buffer cache as an WriteCache mechanism. |
| 128 | * |
| 129 | * This means that in event of a hard failure, there is a risk |
| 130 | * of silent data-loss if the SCSI client has *not* performed a |
| 131 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE |
| 132 | * to write-out the entire device cache. |
| 133 | */ |
| 134 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 135 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); |
| 136 | flags &= ~O_DSYNC; |
| 137 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 138 | |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 139 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 140 | if (IS_ERR(file)) { |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 141 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 142 | ret = PTR_ERR(file); |
| 143 | goto fail; |
| 144 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 145 | fd_dev->fd_file = file; |
| 146 | /* |
| 147 | * If using a block backend with this struct file, we extract |
| 148 | * fd_dev->fd_[block,dev]_size from struct block_device. |
| 149 | * |
| 150 | * Otherwise, we use the passed fd_size= from configfs |
| 151 | */ |
| 152 | inode = file->f_mapping->host; |
| 153 | if (S_ISBLK(inode->i_mode)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 154 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 155 | unsigned long long dev_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 156 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 157 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 158 | /* |
| 159 | * Determine the number of bytes from i_size_read() minus |
| 160 | * one (1) logical sector from underlying struct block_device |
| 161 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 162 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | fd_dev->fd_block_size); |
| 164 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 165 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 166 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 167 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 168 | fd_dev->fd_block_size); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 169 | /* |
| 170 | * Check if the underlying struct block_device request_queue supports |
| 171 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM |
| 172 | * in ATA and we need to set TPE=1 |
| 173 | */ |
| 174 | if (blk_queue_discard(q)) { |
| 175 | dev->dev_attrib.max_unmap_lba_count = |
| 176 | q->limits.max_discard_sectors; |
| 177 | /* |
| 178 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 179 | */ |
| 180 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 181 | dev->dev_attrib.unmap_granularity = |
| 182 | q->limits.discard_granularity >> 9; |
| 183 | dev->dev_attrib.unmap_granularity_alignment = |
| 184 | q->limits.discard_alignment; |
| 185 | pr_debug("IFILE: BLOCK Discard support available," |
| 186 | " disabled by default\n"); |
| 187 | } |
| 188 | /* |
| 189 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 190 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 191 | */ |
| 192 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Asias He | 0463a3f | 2013-04-24 19:38:11 -0700 | [diff] [blame] | 193 | |
| 194 | if (blk_queue_nonrot(q)) |
| 195 | dev->dev_attrib.is_nonrot = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 196 | } else { |
| 197 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 198 | pr_err("FILEIO: Missing fd_dev_size=" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 199 | " parameter, and no backing struct" |
| 200 | " block_device\n"); |
| 201 | goto fail; |
| 202 | } |
| 203 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 204 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 205 | /* |
| 206 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 207 | */ |
| 208 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 209 | /* |
| 210 | * Currently hardcoded to 1 in Linux/SCSI code.. |
| 211 | */ |
| 212 | dev->dev_attrib.max_unmap_block_desc_count = 1; |
| 213 | dev->dev_attrib.unmap_granularity = 1; |
| 214 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 215 | |
| 216 | /* |
| 217 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 218 | * based upon struct iovec limit for vfs_writev() |
| 219 | */ |
| 220 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 221 | } |
| 222 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 223 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 224 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
| 225 | 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] | 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 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 262 | static int fd_do_prot_rw(struct se_cmd *cmd, struct fd_prot *fd_prot, |
| 263 | int is_write) |
| 264 | { |
| 265 | struct se_device *se_dev = cmd->se_dev; |
| 266 | struct fd_dev *dev = FD_DEV(se_dev); |
| 267 | struct file *prot_fd = dev->fd_prot_file; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 268 | loff_t pos = (cmd->t_task_lba * se_dev->prot_length); |
| 269 | unsigned char *buf; |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 270 | u32 prot_size; |
| 271 | int rc, ret = 1; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 272 | |
| 273 | prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * |
| 274 | se_dev->prot_length; |
| 275 | |
| 276 | if (!is_write) { |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 277 | fd_prot->prot_buf = kzalloc(prot_size, GFP_KERNEL); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 278 | if (!fd_prot->prot_buf) { |
| 279 | pr_err("Unable to allocate fd_prot->prot_buf\n"); |
| 280 | return -ENOMEM; |
| 281 | } |
| 282 | buf = fd_prot->prot_buf; |
| 283 | |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 284 | fd_prot->prot_sg_nents = 1; |
| 285 | fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist), |
| 286 | GFP_KERNEL); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 287 | if (!fd_prot->prot_sg) { |
| 288 | pr_err("Unable to allocate fd_prot->prot_sg\n"); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 289 | kfree(fd_prot->prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 290 | return -ENOMEM; |
| 291 | } |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 292 | sg_init_table(fd_prot->prot_sg, fd_prot->prot_sg_nents); |
Akinobu Mita | c836777 | 2015-04-13 23:21:57 +0900 | [diff] [blame] | 293 | sg_set_buf(fd_prot->prot_sg, buf, prot_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | if (is_write) { |
| 297 | rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); |
| 298 | if (rc < 0 || prot_size != rc) { |
| 299 | pr_err("kernel_write() for fd_do_prot_rw failed:" |
| 300 | " %d\n", rc); |
| 301 | ret = -EINVAL; |
| 302 | } |
| 303 | } else { |
| 304 | rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); |
| 305 | if (rc < 0) { |
| 306 | pr_err("kernel_read() for fd_do_prot_rw failed:" |
| 307 | " %d\n", rc); |
| 308 | ret = -EINVAL; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | if (is_write || ret < 0) { |
| 313 | kfree(fd_prot->prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 314 | kfree(fd_prot->prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | return ret; |
| 318 | } |
| 319 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 320 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
| 321 | u32 sgl_nents, int is_write) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 322 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 323 | struct se_device *se_dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 324 | struct fd_dev *dev = FD_DEV(se_dev); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 325 | struct file *fd = dev->fd_file; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 326 | struct scatterlist *sg; |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 327 | struct iov_iter iter; |
| 328 | struct bio_vec *bvec; |
| 329 | ssize_t len = 0; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 330 | 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] | 331 | int ret = 0, i; |
| 332 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 333 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
| 334 | if (!bvec) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 335 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 336 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 337 | } |
| 338 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 339 | for_each_sg(sgl, sg, sgl_nents, i) { |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 340 | bvec[i].bv_page = sg_page(sg); |
| 341 | bvec[i].bv_len = sg->length; |
| 342 | bvec[i].bv_offset = sg->offset; |
| 343 | |
| 344 | len += sg->length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 345 | } |
| 346 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 347 | iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 348 | if (is_write) |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 349 | ret = vfs_iter_write(fd, &iter, &pos); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 350 | else |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 351 | ret = vfs_iter_read(fd, &iter, &pos); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 352 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 353 | kfree(bvec); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 354 | |
| 355 | if (is_write) { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 356 | if (ret < 0 || ret != cmd->data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 357 | pr_err("%s() write returned %d\n", __func__, ret); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 358 | return (ret < 0 ? ret : -EINVAL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 359 | } |
| 360 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 361 | /* |
| 362 | * Return zeros and GOOD status even if the READ did not return |
| 363 | * the expected virt_size for struct file w/o a backing struct |
| 364 | * block_device. |
| 365 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 366 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 367 | if (ret < 0 || ret != cmd->data_length) { |
| 368 | pr_err("%s() returned %d, expecting %u for " |
| 369 | "S_ISBLK\n", __func__, ret, |
| 370 | cmd->data_length); |
| 371 | return (ret < 0 ? ret : -EINVAL); |
| 372 | } |
| 373 | } else { |
| 374 | if (ret < 0) { |
| 375 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 376 | __func__, ret); |
| 377 | return ret; |
| 378 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 379 | } |
| 380 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 381 | return 1; |
| 382 | } |
| 383 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 384 | static sense_reason_t |
| 385 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 387 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 388 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 389 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 390 | loff_t start, end; |
| 391 | int ret; |
| 392 | |
| 393 | /* |
| 394 | * If the Immediate bit is set, queue up the GOOD response |
| 395 | * for this SYNCHRONIZE_CACHE op |
| 396 | */ |
| 397 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 398 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 399 | |
| 400 | /* |
| 401 | * Determine if we will be flushing the entire device. |
| 402 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 403 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 404 | start = 0; |
| 405 | end = LLONG_MAX; |
| 406 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 407 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 408 | if (cmd->data_length) |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 409 | end = start + cmd->data_length - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 410 | else |
| 411 | end = LLONG_MAX; |
| 412 | } |
| 413 | |
| 414 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 415 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 416 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 418 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 419 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 420 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 421 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 422 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 423 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 424 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 425 | |
| 426 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 427 | } |
| 428 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 429 | static sense_reason_t |
| 430 | fd_execute_write_same(struct se_cmd *cmd) |
| 431 | { |
| 432 | struct se_device *se_dev = cmd->se_dev; |
| 433 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 434 | 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] | 435 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 436 | struct iov_iter iter; |
| 437 | struct bio_vec *bvec; |
| 438 | unsigned int len = 0, i; |
| 439 | ssize_t ret; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 440 | |
| 441 | if (!nolb) { |
| 442 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 443 | return 0; |
| 444 | } |
Nicholas Bellinger | afd73f1 | 2015-02-14 01:32:11 +0000 | [diff] [blame] | 445 | if (cmd->prot_op) { |
| 446 | pr_err("WRITE_SAME: Protection information with FILEIO" |
| 447 | " backends not supported\n"); |
| 448 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 449 | } |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 450 | |
| 451 | if (cmd->t_data_nents > 1 || |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 452 | 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] | 453 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 454 | " block_size: %u\n", |
| 455 | cmd->t_data_nents, |
| 456 | cmd->t_data_sg[0].length, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 457 | cmd->se_dev->dev_attrib.block_size); |
| 458 | return TCM_INVALID_CDB_FIELD; |
| 459 | } |
| 460 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 461 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
| 462 | if (!bvec) |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 463 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 464 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 465 | for (i = 0; i < nolb; i++) { |
| 466 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); |
| 467 | bvec[i].bv_len = cmd->t_data_sg[0].length; |
| 468 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; |
| 469 | |
| 470 | len += se_dev->dev_attrib.block_size; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 471 | } |
| 472 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 473 | iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); |
| 474 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 475 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 476 | kfree(bvec); |
| 477 | if (ret < 0 || ret != len) { |
| 478 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 479 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 480 | } |
| 481 | |
| 482 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 483 | return 0; |
| 484 | } |
| 485 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 486 | static int |
| 487 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, |
| 488 | void *buf, size_t bufsize) |
| 489 | { |
| 490 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 491 | struct file *prot_fd = fd_dev->fd_prot_file; |
| 492 | sector_t prot_length, prot; |
| 493 | loff_t pos = lba * se_dev->prot_length; |
| 494 | |
| 495 | if (!prot_fd) { |
| 496 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); |
| 497 | return -ENODEV; |
| 498 | } |
| 499 | |
| 500 | prot_length = nolb * se_dev->prot_length; |
| 501 | |
| 502 | for (prot = 0; prot < prot_length;) { |
| 503 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); |
| 504 | ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot); |
| 505 | |
| 506 | if (ret != len) { |
| 507 | pr_err("vfs_write to prot file failed: %zd\n", ret); |
| 508 | return ret < 0 ? ret : -ENODEV; |
| 509 | } |
| 510 | prot += ret; |
| 511 | } |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static int |
| 517 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
| 518 | { |
| 519 | void *buf; |
| 520 | int rc; |
| 521 | |
| 522 | buf = (void *)__get_free_page(GFP_KERNEL); |
| 523 | if (!buf) { |
| 524 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 525 | return -ENOMEM; |
| 526 | } |
| 527 | memset(buf, 0xff, PAGE_SIZE); |
| 528 | |
| 529 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); |
| 530 | |
| 531 | free_page((unsigned long)buf); |
| 532 | |
| 533 | return rc; |
| 534 | } |
| 535 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 536 | static sense_reason_t |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 537 | 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] | 538 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 539 | struct file *file = priv; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 540 | struct inode *inode = file->f_mapping->host; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 541 | int ret; |
| 542 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 543 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
| 544 | ret = fd_do_prot_unmap(cmd, lba, nolb); |
| 545 | if (ret) |
| 546 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 547 | } |
| 548 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 549 | if (S_ISBLK(inode->i_mode)) { |
| 550 | /* The backend is block device, use discard */ |
| 551 | struct block_device *bdev = inode->i_bdev; |
| 552 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 553 | ret = blkdev_issue_discard(bdev, lba, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 554 | nolb, GFP_KERNEL, 0); |
| 555 | if (ret < 0) { |
| 556 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 557 | ret); |
| 558 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 559 | } |
| 560 | } else { |
| 561 | /* The backend is normal file, use fallocate */ |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 562 | struct se_device *se_dev = cmd->se_dev; |
| 563 | loff_t pos = lba * se_dev->dev_attrib.block_size; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 564 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 565 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 566 | |
| 567 | if (!file->f_op->fallocate) |
| 568 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 569 | |
| 570 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 571 | if (ret < 0) { |
| 572 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 573 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 574 | } |
| 575 | } |
| 576 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 577 | return 0; |
| 578 | } |
| 579 | |
| 580 | static sense_reason_t |
| 581 | fd_execute_write_same_unmap(struct se_cmd *cmd) |
| 582 | { |
| 583 | struct se_device *se_dev = cmd->se_dev; |
| 584 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 585 | struct file *file = fd_dev->fd_file; |
| 586 | sector_t lba = cmd->t_task_lba; |
| 587 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
Christoph Hellwig | 3abff1e | 2015-03-26 12:27:35 +0100 | [diff] [blame] | 588 | sense_reason_t ret; |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 589 | |
| 590 | if (!nolb) { |
| 591 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | ret = fd_do_unmap(cmd, file, lba, nolb); |
| 596 | if (ret) |
| 597 | return ret; |
| 598 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 599 | target_complete_cmd(cmd, GOOD); |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static sense_reason_t |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 604 | fd_execute_unmap(struct se_cmd *cmd) |
| 605 | { |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 606 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 607 | |
Asias He | 86d7182 | 2013-02-25 14:03:46 +0800 | [diff] [blame] | 608 | return sbc_execute_unmap(cmd, fd_do_unmap, file); |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | static sense_reason_t |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 612 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 613 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 614 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 615 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 616 | struct fd_prot fd_prot; |
| 617 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 618 | int ret = 0; |
Nicholas Bellinger | 046ba64 | 2015-01-06 16:10:37 -0800 | [diff] [blame] | 619 | /* |
| 620 | * We are currently limited by the number of iovecs (2048) per |
| 621 | * single vfs_[writev,readv] call. |
| 622 | */ |
| 623 | if (cmd->data_length > FD_MAX_BYTES) { |
| 624 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" |
| 625 | "FD_MAX_BYTES: %u iovec count limitiation\n", |
| 626 | cmd->data_length, FD_MAX_BYTES); |
| 627 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 628 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 629 | /* |
| 630 | * Call vectorized fileio functions to map struct scatterlist |
| 631 | * physical memory addresses to struct iovec virtual memory. |
| 632 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 633 | if (data_direction == DMA_FROM_DEVICE) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 634 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 635 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 636 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 637 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 638 | if (ret < 0) |
| 639 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 640 | } |
| 641 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 642 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 643 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 644 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 645 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 646 | |
| 647 | rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, |
| 648 | 0, fd_prot.prot_sg, 0); |
| 649 | if (rc) { |
| 650 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 651 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 652 | return rc; |
| 653 | } |
| 654 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 655 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 656 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 657 | } else { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 658 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
| 659 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 660 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 661 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
| 662 | |
| 663 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
| 664 | if (ret < 0) |
| 665 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 666 | |
| 667 | rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, |
| 668 | 0, fd_prot.prot_sg, 0); |
| 669 | if (rc) { |
| 670 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 671 | kfree(fd_prot.prot_buf); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 672 | return rc; |
| 673 | } |
| 674 | } |
| 675 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 676 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 677 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 678 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 679 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 680 | * Allow this to happen independent of WCE=0 setting. |
| 681 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 682 | if (ret > 0 && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 683 | dev->dev_attrib.emulate_fua_write > 0 && |
Christoph Hellwig | 2d3a4b5 | 2011-11-14 11:36:29 -0500 | [diff] [blame] | 684 | (cmd->se_cmd_flags & SCF_FUA)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 685 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 686 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 687 | dev->dev_attrib.block_size; |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 688 | loff_t end; |
| 689 | |
| 690 | if (cmd->data_length) |
| 691 | end = start + cmd->data_length - 1; |
| 692 | else |
| 693 | end = LLONG_MAX; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 694 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 695 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 696 | } |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 697 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 698 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 699 | ret = fd_do_prot_rw(cmd, &fd_prot, true); |
| 700 | if (ret < 0) |
| 701 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 702 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 703 | } |
| 704 | |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 705 | if (ret < 0) { |
| 706 | kfree(fd_prot.prot_sg); |
Akinobu Mita | 38da0f4 | 2015-04-13 23:21:56 +0900 | [diff] [blame] | 707 | kfree(fd_prot.prot_buf); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 708 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 709 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 710 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 711 | if (ret) |
| 712 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 713 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 714 | } |
| 715 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | enum { |
| 717 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err |
| 718 | }; |
| 719 | |
| 720 | static match_table_t tokens = { |
| 721 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 722 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 723 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 724 | {Opt_err, NULL} |
| 725 | }; |
| 726 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 727 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 728 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 729 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 730 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 731 | char *orig, *ptr, *arg_p, *opts; |
| 732 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 733 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 734 | |
| 735 | opts = kstrdup(page, GFP_KERNEL); |
| 736 | if (!opts) |
| 737 | return -ENOMEM; |
| 738 | |
| 739 | orig = opts; |
| 740 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 741 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 742 | if (!*ptr) |
| 743 | continue; |
| 744 | |
| 745 | token = match_token(ptr, tokens, args); |
| 746 | switch (token) { |
| 747 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 748 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 749 | FD_MAX_DEV_NAME) == 0) { |
| 750 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 751 | break; |
| 752 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 753 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 754 | fd_dev->fd_dev_name); |
| 755 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 756 | break; |
| 757 | case Opt_fd_dev_size: |
| 758 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 759 | if (!arg_p) { |
| 760 | ret = -ENOMEM; |
| 761 | break; |
| 762 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 763 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 764 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 765 | if (ret < 0) { |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 766 | pr_err("kstrtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 767 | " fd_dev_size=\n"); |
| 768 | goto out; |
| 769 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 770 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 771 | " bytes\n", fd_dev->fd_dev_size); |
| 772 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 773 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 774 | case Opt_fd_buffered_io: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 775 | ret = match_int(args, &arg); |
| 776 | if (ret) |
| 777 | goto out; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 778 | if (arg != 1) { |
| 779 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 780 | ret = -EINVAL; |
| 781 | goto out; |
| 782 | } |
| 783 | |
| 784 | pr_debug("FILEIO: Using buffered I/O" |
| 785 | " operations for struct fd_dev\n"); |
| 786 | |
| 787 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 788 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 789 | default: |
| 790 | break; |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | out: |
| 795 | kfree(orig); |
| 796 | return (!ret) ? count : ret; |
| 797 | } |
| 798 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 799 | 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] | 800 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 801 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 802 | ssize_t bl = 0; |
| 803 | |
| 804 | 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] | 805 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
| 806 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 807 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
| 808 | "Buffered-WCE" : "O_DSYNC"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 809 | return bl; |
| 810 | } |
| 811 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 812 | static sector_t fd_get_blocks(struct se_device *dev) |
| 813 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 814 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 815 | struct file *f = fd_dev->fd_file; |
| 816 | struct inode *i = f->f_mapping->host; |
| 817 | unsigned long long dev_size; |
| 818 | /* |
| 819 | * When using a file that references an underlying struct block_device, |
| 820 | * ensure dev_size is always based on the current inode size in order |
| 821 | * to handle underlying block_device resize operations. |
| 822 | */ |
| 823 | if (S_ISBLK(i->i_mode)) |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 824 | dev_size = i_size_read(i); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 825 | else |
| 826 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 827 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 828 | return div_u64(dev_size - dev->dev_attrib.block_size, |
| 829 | dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 830 | } |
| 831 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 832 | static int fd_init_prot(struct se_device *dev) |
| 833 | { |
| 834 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 835 | struct file *prot_file, *file = fd_dev->fd_file; |
| 836 | struct inode *inode; |
| 837 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
| 838 | char buf[FD_MAX_DEV_PROT_NAME]; |
| 839 | |
| 840 | if (!file) { |
| 841 | pr_err("Unable to locate fd_dev->fd_file\n"); |
| 842 | return -ENODEV; |
| 843 | } |
| 844 | |
| 845 | inode = file->f_mapping->host; |
| 846 | if (S_ISBLK(inode->i_mode)) { |
| 847 | pr_err("FILEIO Protection emulation only supported on" |
| 848 | " !S_ISBLK\n"); |
| 849 | return -ENOSYS; |
| 850 | } |
| 851 | |
| 852 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) |
| 853 | flags &= ~O_DSYNC; |
| 854 | |
| 855 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", |
| 856 | fd_dev->fd_dev_name); |
| 857 | |
| 858 | prot_file = filp_open(buf, flags, 0600); |
| 859 | if (IS_ERR(prot_file)) { |
| 860 | pr_err("filp_open(%s) failed\n", buf); |
| 861 | ret = PTR_ERR(prot_file); |
| 862 | return ret; |
| 863 | } |
| 864 | fd_dev->fd_prot_file = prot_file; |
| 865 | |
| 866 | return 0; |
| 867 | } |
| 868 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 869 | static int fd_format_prot(struct se_device *dev) |
| 870 | { |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 871 | unsigned char *buf; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 872 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 873 | int ret; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 874 | |
| 875 | if (!dev->dev_attrib.pi_prot_type) { |
| 876 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); |
| 877 | return -ENODEV; |
| 878 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 879 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 880 | buf = vzalloc(unit_size); |
| 881 | if (!buf) { |
| 882 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 883 | return -ENOMEM; |
| 884 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 885 | |
| 886 | pr_debug("Using FILEIO prot_length: %llu\n", |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 887 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
| 888 | dev->prot_length); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 889 | |
Sagi Grimberg | 80dcd0c | 2014-02-19 17:50:16 +0200 | [diff] [blame] | 890 | memset(buf, 0xff, unit_size); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 891 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
| 892 | buf, unit_size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 893 | vfree(buf); |
| 894 | return ret; |
| 895 | } |
| 896 | |
| 897 | static void fd_free_prot(struct se_device *dev) |
| 898 | { |
| 899 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 900 | |
| 901 | if (!fd_dev->fd_prot_file) |
| 902 | return; |
| 903 | |
| 904 | filp_close(fd_dev->fd_prot_file, NULL); |
| 905 | fd_dev->fd_prot_file = NULL; |
| 906 | } |
| 907 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 908 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 909 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 910 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 911 | .execute_write_same = fd_execute_write_same, |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 912 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 913 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 914 | }; |
| 915 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 916 | static sense_reason_t |
| 917 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 918 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 919 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 920 | } |
| 921 | |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 922 | DEF_TB_DEFAULT_ATTRIBS(fileio); |
| 923 | |
| 924 | static struct configfs_attribute *fileio_backend_dev_attrs[] = { |
| 925 | &fileio_dev_attrib_emulate_model_alias.attr, |
| 926 | &fileio_dev_attrib_emulate_dpo.attr, |
| 927 | &fileio_dev_attrib_emulate_fua_write.attr, |
| 928 | &fileio_dev_attrib_emulate_fua_read.attr, |
| 929 | &fileio_dev_attrib_emulate_write_cache.attr, |
| 930 | &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr, |
| 931 | &fileio_dev_attrib_emulate_tas.attr, |
| 932 | &fileio_dev_attrib_emulate_tpu.attr, |
| 933 | &fileio_dev_attrib_emulate_tpws.attr, |
| 934 | &fileio_dev_attrib_emulate_caw.attr, |
| 935 | &fileio_dev_attrib_emulate_3pc.attr, |
| 936 | &fileio_dev_attrib_pi_prot_type.attr, |
| 937 | &fileio_dev_attrib_hw_pi_prot_type.attr, |
| 938 | &fileio_dev_attrib_pi_prot_format.attr, |
| 939 | &fileio_dev_attrib_enforce_pr_isids.attr, |
| 940 | &fileio_dev_attrib_is_nonrot.attr, |
| 941 | &fileio_dev_attrib_emulate_rest_reord.attr, |
| 942 | &fileio_dev_attrib_force_pr_aptpl.attr, |
| 943 | &fileio_dev_attrib_hw_block_size.attr, |
| 944 | &fileio_dev_attrib_block_size.attr, |
| 945 | &fileio_dev_attrib_hw_max_sectors.attr, |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 946 | &fileio_dev_attrib_optimal_sectors.attr, |
| 947 | &fileio_dev_attrib_hw_queue_depth.attr, |
| 948 | &fileio_dev_attrib_queue_depth.attr, |
| 949 | &fileio_dev_attrib_max_unmap_lba_count.attr, |
| 950 | &fileio_dev_attrib_max_unmap_block_desc_count.attr, |
| 951 | &fileio_dev_attrib_unmap_granularity.attr, |
| 952 | &fileio_dev_attrib_unmap_granularity_alignment.attr, |
| 953 | &fileio_dev_attrib_max_write_same_len.attr, |
| 954 | NULL, |
| 955 | }; |
| 956 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 957 | static struct se_subsystem_api fileio_template = { |
| 958 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 959 | .inquiry_prod = "FILEIO", |
| 960 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 961 | .owner = THIS_MODULE, |
| 962 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, |
| 963 | .attach_hba = fd_attach_hba, |
| 964 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 965 | .alloc_device = fd_alloc_device, |
| 966 | .configure_device = fd_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 967 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 968 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 969 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 970 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 971 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 972 | .get_blocks = fd_get_blocks, |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 973 | .init_prot = fd_init_prot, |
| 974 | .format_prot = fd_format_prot, |
| 975 | .free_prot = fd_free_prot, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 976 | }; |
| 977 | |
| 978 | static int __init fileio_module_init(void) |
| 979 | { |
Nicholas Bellinger | b232049 | 2014-11-28 04:56:30 +0000 | [diff] [blame] | 980 | struct target_backend_cits *tbc = &fileio_template.tb_cits; |
| 981 | |
| 982 | target_core_setup_sub_cits(&fileio_template); |
| 983 | tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs; |
| 984 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 985 | return transport_subsystem_register(&fileio_template); |
| 986 | } |
| 987 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 988 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 989 | { |
| 990 | transport_subsystem_release(&fileio_template); |
| 991 | } |
| 992 | |
| 993 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 994 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 995 | MODULE_LICENSE("GPL"); |
| 996 | |
| 997 | module_init(fileio_module_init); |
| 998 | module_exit(fileio_module_exit); |