Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2 | /******************************************************************************* |
| 3 | * Filename: target_core_file.c |
| 4 | * |
| 5 | * This file contains the Storage Engine <-> FILEIO transport specific functions |
| 6 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 7 | * (c) Copyright 2005-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 8 | * |
| 9 | * Nicholas A. Bellinger <nab@kernel.org> |
| 10 | * |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 11 | ******************************************************************************/ |
| 12 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 13 | #include <linux/string.h> |
| 14 | #include <linux/parser.h> |
| 15 | #include <linux/timer.h> |
| 16 | #include <linux/blkdev.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/spinlock.h> |
Paul Gortmaker | 827509e | 2011-08-30 14:20:44 -0400 | [diff] [blame] | 19 | #include <linux/module.h> |
David S. Miller | 5538d29 | 2015-05-28 11:35:41 -0700 | [diff] [blame] | 20 | #include <linux/vmalloc.h> |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 21 | #include <linux/falloc.h> |
Bart Van Assche | 8dcf07b | 2016-11-14 15:47:14 -0800 | [diff] [blame] | 22 | #include <linux/uio.h> |
Bart Van Assche | ba92999 | 2015-05-08 10:11:12 +0200 | [diff] [blame] | 23 | #include <scsi/scsi_proto.h> |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 24 | #include <asm/unaligned.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 25 | |
| 26 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 27 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 28 | |
| 29 | #include "target_core_file.h" |
| 30 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 31 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
| 32 | { |
| 33 | return container_of(dev, struct fd_dev, dev); |
| 34 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 35 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
| 37 | { |
| 38 | struct fd_host *fd_host; |
| 39 | |
| 40 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 41 | if (!fd_host) { |
| 42 | pr_err("Unable to allocate memory for struct fd_host\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 43 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | fd_host->fd_host_id = host_id; |
| 47 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 48 | hba->hba_ptr = fd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 49 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 50 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
Christoph Hellwig | ce8dd25 | 2015-06-19 15:14:39 +0200 | [diff] [blame] | 52 | TARGET_CORE_VERSION); |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 53 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
| 54 | hba->hba_id, fd_host->fd_host_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | static void fd_detach_hba(struct se_hba *hba) |
| 60 | { |
| 61 | struct fd_host *fd_host = hba->hba_ptr; |
| 62 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 63 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 64 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
| 65 | |
| 66 | kfree(fd_host); |
| 67 | hba->hba_ptr = NULL; |
| 68 | } |
| 69 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 70 | 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] | 71 | { |
| 72 | struct fd_dev *fd_dev; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 73 | struct fd_host *fd_host = hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | |
| 75 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 76 | if (!fd_dev) { |
| 77 | pr_err("Unable to allocate memory for struct fd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | return NULL; |
| 79 | } |
| 80 | |
| 81 | fd_dev->fd_host = fd_host; |
| 82 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 83 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 85 | return &fd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 86 | } |
| 87 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 88 | static int fd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 90 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 91 | struct fd_host *fd_host = dev->se_hba->hba_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 92 | struct file *file; |
| 93 | struct inode *inode = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 94 | int flags, ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 95 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 96 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
| 97 | pr_err("Missing fd_dev_name=\n"); |
| 98 | return -EINVAL; |
| 99 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 100 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 101 | /* |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 102 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
| 103 | * of pure timestamp updates. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 104 | */ |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 105 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 106 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 107 | /* |
| 108 | * Optionally allow fd_buffered_io=1 to be enabled for people |
| 109 | * who want use the fs buffer cache as an WriteCache mechanism. |
| 110 | * |
| 111 | * This means that in event of a hard failure, there is a risk |
| 112 | * of silent data-loss if the SCSI client has *not* performed a |
| 113 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE |
| 114 | * to write-out the entire device cache. |
| 115 | */ |
| 116 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 117 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); |
| 118 | flags &= ~O_DSYNC; |
| 119 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 121 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 122 | if (IS_ERR(file)) { |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 123 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 124 | ret = PTR_ERR(file); |
| 125 | goto fail; |
| 126 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 127 | fd_dev->fd_file = file; |
| 128 | /* |
| 129 | * If using a block backend with this struct file, we extract |
| 130 | * fd_dev->fd_[block,dev]_size from struct block_device. |
| 131 | * |
| 132 | * Otherwise, we use the passed fd_size= from configfs |
| 133 | */ |
| 134 | inode = file->f_mapping->host; |
| 135 | if (S_ISBLK(inode->i_mode)) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 136 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 137 | unsigned long long dev_size; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 138 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 139 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 140 | /* |
| 141 | * Determine the number of bytes from i_size_read() minus |
| 142 | * one (1) logical sector from underlying struct block_device |
| 143 | */ |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 144 | dev_size = (i_size_read(file->f_mapping->host) - |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 145 | fd_dev->fd_block_size); |
| 146 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 147 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 148 | " block_device blocks: %llu logical_block_size: %d\n", |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 149 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | fd_dev->fd_block_size); |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 151 | |
Mike Christie | ea263c7 | 2016-06-02 20:12:37 -0500 | [diff] [blame] | 152 | if (target_configure_unmap_from_queue(&dev->dev_attrib, q)) |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 153 | pr_debug("IFILE: BLOCK Discard support available," |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 154 | " disabled by default\n"); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 155 | /* |
| 156 | * Enable write same emulation for IBLOCK and use 0xFFFF as |
| 157 | * the smaller WRITE_SAME(10) only has a two-byte block count. |
| 158 | */ |
| 159 | dev->dev_attrib.max_write_same_len = 0xFFFF; |
Asias He | 0463a3f | 2013-04-24 19:38:11 -0700 | [diff] [blame] | 160 | |
| 161 | if (blk_queue_nonrot(q)) |
| 162 | dev->dev_attrib.is_nonrot = 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 163 | } else { |
| 164 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 165 | pr_err("FILEIO: Missing fd_dev_size=" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 166 | " parameter, and no backing struct" |
| 167 | " block_device\n"); |
| 168 | goto fail; |
| 169 | } |
| 170 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 171 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 172 | /* |
| 173 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) |
| 174 | */ |
| 175 | dev->dev_attrib.max_unmap_lba_count = 0x2000; |
| 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 = 1; |
| 181 | dev->dev_attrib.unmap_granularity_alignment = 0; |
| 182 | |
| 183 | /* |
| 184 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) |
| 185 | * based upon struct iovec limit for vfs_writev() |
| 186 | */ |
| 187 | dev->dev_attrib.max_write_same_len = 0x1000; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 188 | } |
| 189 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 190 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
Nicholas Bellinger | 95cadac | 2013-12-12 12:24:11 -0800 | [diff] [blame] | 191 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
| 192 | 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] | 193 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 194 | |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 195 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
| 196 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" |
| 197 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 198 | dev->dev_attrib.emulate_write_cache = 1; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 199 | } |
| 200 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
| 202 | fd_dev->fd_queue_depth = dev->queue_depth; |
| 203 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 204 | 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] | 205 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
| 206 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); |
| 207 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 208 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 209 | fail: |
| 210 | if (fd_dev->fd_file) { |
| 211 | filp_close(fd_dev->fd_file, NULL); |
| 212 | fd_dev->fd_file = NULL; |
| 213 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 214 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 215 | } |
| 216 | |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 217 | static void fd_dev_call_rcu(struct rcu_head *p) |
| 218 | { |
| 219 | struct se_device *dev = container_of(p, struct se_device, rcu_head); |
| 220 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 221 | |
| 222 | kfree(fd_dev); |
| 223 | } |
| 224 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 225 | static void fd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 226 | { |
Mike Christie | 9263470 | 2017-06-23 01:18:12 -0500 | [diff] [blame] | 227 | call_rcu(&dev->rcu_head, fd_dev_call_rcu); |
| 228 | } |
| 229 | |
| 230 | static void fd_destroy_device(struct se_device *dev) |
| 231 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 232 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 233 | |
| 234 | if (fd_dev->fd_file) { |
| 235 | filp_close(fd_dev->fd_file, NULL); |
| 236 | fd_dev->fd_file = NULL; |
| 237 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 238 | } |
| 239 | |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 240 | struct target_core_file_cmd { |
| 241 | unsigned long len; |
| 242 | struct se_cmd *cmd; |
| 243 | struct kiocb iocb; |
| 244 | }; |
| 245 | |
| 246 | static void cmd_rw_aio_complete(struct kiocb *iocb, long ret, long ret2) |
| 247 | { |
| 248 | struct target_core_file_cmd *cmd; |
| 249 | |
| 250 | cmd = container_of(iocb, struct target_core_file_cmd, iocb); |
| 251 | |
| 252 | if (ret != cmd->len) |
| 253 | target_complete_cmd(cmd->cmd, SAM_STAT_CHECK_CONDITION); |
| 254 | else |
| 255 | target_complete_cmd(cmd->cmd, SAM_STAT_GOOD); |
| 256 | |
| 257 | kfree(cmd); |
| 258 | } |
| 259 | |
| 260 | static sense_reason_t |
| 261 | fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 262 | enum dma_data_direction data_direction) |
| 263 | { |
| 264 | int is_write = !(data_direction == DMA_FROM_DEVICE); |
| 265 | struct se_device *dev = cmd->se_dev; |
| 266 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 267 | struct file *file = fd_dev->fd_file; |
| 268 | struct target_core_file_cmd *aio_cmd; |
| 269 | struct iov_iter iter = {}; |
| 270 | struct scatterlist *sg; |
| 271 | struct bio_vec *bvec; |
| 272 | ssize_t len = 0; |
| 273 | int ret = 0, i; |
| 274 | |
| 275 | aio_cmd = kmalloc(sizeof(struct target_core_file_cmd), GFP_KERNEL); |
| 276 | if (!aio_cmd) |
| 277 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 278 | |
| 279 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
| 280 | if (!bvec) { |
| 281 | kfree(aio_cmd); |
| 282 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 283 | } |
| 284 | |
| 285 | for_each_sg(sgl, sg, sgl_nents, i) { |
| 286 | bvec[i].bv_page = sg_page(sg); |
| 287 | bvec[i].bv_len = sg->length; |
| 288 | bvec[i].bv_offset = sg->offset; |
| 289 | |
| 290 | len += sg->length; |
| 291 | } |
| 292 | |
David Howells | aa563d7 | 2018-10-20 00:57:56 +0100 | [diff] [blame] | 293 | iov_iter_bvec(&iter, is_write, bvec, sgl_nents, len); |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 294 | |
| 295 | aio_cmd->cmd = cmd; |
| 296 | aio_cmd->len = len; |
| 297 | aio_cmd->iocb.ki_pos = cmd->t_task_lba * dev->dev_attrib.block_size; |
| 298 | aio_cmd->iocb.ki_filp = file; |
| 299 | aio_cmd->iocb.ki_complete = cmd_rw_aio_complete; |
| 300 | aio_cmd->iocb.ki_flags = IOCB_DIRECT; |
| 301 | |
| 302 | if (is_write && (cmd->se_cmd_flags & SCF_FUA)) |
| 303 | aio_cmd->iocb.ki_flags |= IOCB_DSYNC; |
| 304 | |
| 305 | if (is_write) |
| 306 | ret = call_write_iter(file, &aio_cmd->iocb, &iter); |
| 307 | else |
| 308 | ret = call_read_iter(file, &aio_cmd->iocb, &iter); |
| 309 | |
| 310 | kfree(bvec); |
| 311 | |
| 312 | if (ret != -EIOCBQUEUED) |
| 313 | cmd_rw_aio_complete(&aio_cmd->iocb, ret, 0); |
| 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 318 | static int fd_do_rw(struct se_cmd *cmd, struct file *fd, |
| 319 | u32 block_size, struct scatterlist *sgl, |
| 320 | u32 sgl_nents, u32 data_length, int is_write) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 321 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 322 | struct scatterlist *sg; |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 323 | struct iov_iter iter; |
| 324 | struct bio_vec *bvec; |
| 325 | ssize_t len = 0; |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 326 | loff_t pos = (cmd->t_task_lba * block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 327 | int ret = 0, i; |
| 328 | |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 329 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
| 330 | if (!bvec) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 331 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 332 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 333 | } |
| 334 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 335 | for_each_sg(sgl, sg, sgl_nents, i) { |
Christoph Hellwig | 6b9a44d | 2015-02-22 08:48:41 -0800 | [diff] [blame] | 336 | bvec[i].bv_page = sg_page(sg); |
| 337 | bvec[i].bv_len = sg->length; |
| 338 | bvec[i].bv_offset = sg->offset; |
| 339 | |
| 340 | len += sg->length; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 341 | } |
| 342 | |
David Howells | aa563d7 | 2018-10-20 00:57:56 +0100 | [diff] [blame] | 343 | iov_iter_bvec(&iter, READ, bvec, sgl_nents, len); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 344 | if (is_write) |
Christoph Hellwig | abbb6589 | 2017-05-27 11:16:52 +0300 | [diff] [blame] | 345 | ret = vfs_iter_write(fd, &iter, &pos, 0); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 346 | else |
Christoph Hellwig | 18e9710 | 2017-05-27 11:16:51 +0300 | [diff] [blame] | 347 | ret = vfs_iter_read(fd, &iter, &pos, 0); |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 348 | |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 349 | if (is_write) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 350 | if (ret < 0 || ret != data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 351 | pr_err("%s() write returned %d\n", __func__, ret); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 352 | if (ret >= 0) |
| 353 | ret = -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 354 | } |
| 355 | } else { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 356 | /* |
| 357 | * Return zeros and GOOD status even if the READ did not return |
| 358 | * the expected virt_size for struct file w/o a backing struct |
| 359 | * block_device. |
| 360 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 361 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 362 | if (ret < 0 || ret != data_length) { |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 363 | pr_err("%s() returned %d, expecting %u for " |
| 364 | "S_ISBLK\n", __func__, ret, |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 365 | data_length); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 366 | if (ret >= 0) |
| 367 | ret = -EINVAL; |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 368 | } |
| 369 | } else { |
| 370 | if (ret < 0) { |
| 371 | pr_err("%s() returned %d for non S_ISBLK\n", |
| 372 | __func__, ret); |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 373 | } else if (ret != data_length) { |
| 374 | /* |
| 375 | * Short read case: |
| 376 | * Probably some one truncate file under us. |
| 377 | * We must explicitly zero sg-pages to prevent |
| 378 | * expose uninizialized pages to userspace. |
| 379 | */ |
| 380 | if (ret < data_length) |
| 381 | ret += iov_iter_zero(data_length - ret, &iter); |
| 382 | else |
| 383 | ret = -EINVAL; |
Sebastian Andrzej Siewior | 778229a | 2012-12-05 13:09:45 -0800 | [diff] [blame] | 384 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 385 | } |
| 386 | } |
Dmitry Monakhov | f11b55d | 2017-03-31 19:53:35 +0400 | [diff] [blame] | 387 | kfree(bvec); |
| 388 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | } |
| 390 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 391 | static sense_reason_t |
| 392 | fd_execute_sync_cache(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 393 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 394 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 395 | struct fd_dev *fd_dev = FD_DEV(dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 396 | int immed = (cmd->t_task_cdb[1] & 0x2); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 397 | loff_t start, end; |
| 398 | int ret; |
| 399 | |
| 400 | /* |
| 401 | * If the Immediate bit is set, queue up the GOOD response |
| 402 | * for this SYNCHRONIZE_CACHE op |
| 403 | */ |
| 404 | if (immed) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 405 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 406 | |
| 407 | /* |
| 408 | * Determine if we will be flushing the entire device. |
| 409 | */ |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 410 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | start = 0; |
| 412 | end = LLONG_MAX; |
| 413 | } else { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 414 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | if (cmd->data_length) |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 416 | end = start + cmd->data_length - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | else |
| 418 | end = LLONG_MAX; |
| 419 | } |
| 420 | |
| 421 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 422 | if (ret != 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 423 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 424 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 425 | if (immed) |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 426 | return 0; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 427 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 428 | if (ret) |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 429 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 430 | else |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 431 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 432 | |
| 433 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 434 | } |
| 435 | |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 436 | static sense_reason_t |
| 437 | fd_execute_write_same(struct se_cmd *cmd) |
| 438 | { |
| 439 | struct se_device *se_dev = cmd->se_dev; |
| 440 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 441 | 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] | 442 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
| 443 | struct iov_iter iter; |
| 444 | struct bio_vec *bvec; |
| 445 | unsigned int len = 0, i; |
| 446 | ssize_t ret; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 447 | |
| 448 | if (!nolb) { |
| 449 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 450 | return 0; |
| 451 | } |
Nicholas Bellinger | afd73f1 | 2015-02-14 01:32:11 +0000 | [diff] [blame] | 452 | if (cmd->prot_op) { |
| 453 | pr_err("WRITE_SAME: Protection information with FILEIO" |
| 454 | " backends not supported\n"); |
| 455 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 456 | } |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 457 | |
| 458 | if (cmd->t_data_nents > 1 || |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 459 | 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] | 460 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 461 | " block_size: %u\n", |
| 462 | cmd->t_data_nents, |
| 463 | cmd->t_data_sg[0].length, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 464 | cmd->se_dev->dev_attrib.block_size); |
| 465 | return TCM_INVALID_CDB_FIELD; |
| 466 | } |
| 467 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 468 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
| 469 | if (!bvec) |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 470 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 471 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 472 | for (i = 0; i < nolb; i++) { |
| 473 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); |
| 474 | bvec[i].bv_len = cmd->t_data_sg[0].length; |
| 475 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; |
| 476 | |
| 477 | len += se_dev->dev_attrib.block_size; |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 478 | } |
| 479 | |
David Howells | aa563d7 | 2018-10-20 00:57:56 +0100 | [diff] [blame] | 480 | iov_iter_bvec(&iter, READ, bvec, nolb, len); |
Christoph Hellwig | abbb6589 | 2017-05-27 11:16:52 +0300 | [diff] [blame] | 481 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 482 | |
Christoph Hellwig | d4c5dca | 2015-02-22 08:48:42 -0800 | [diff] [blame] | 483 | kfree(bvec); |
| 484 | if (ret < 0 || ret != len) { |
| 485 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 486 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 487 | } |
| 488 | |
| 489 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 490 | return 0; |
| 491 | } |
| 492 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 493 | static int |
| 494 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, |
| 495 | void *buf, size_t bufsize) |
| 496 | { |
| 497 | struct fd_dev *fd_dev = FD_DEV(se_dev); |
| 498 | struct file *prot_fd = fd_dev->fd_prot_file; |
| 499 | sector_t prot_length, prot; |
| 500 | loff_t pos = lba * se_dev->prot_length; |
| 501 | |
| 502 | if (!prot_fd) { |
| 503 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); |
| 504 | return -ENODEV; |
| 505 | } |
| 506 | |
| 507 | prot_length = nolb * se_dev->prot_length; |
| 508 | |
| 509 | for (prot = 0; prot < prot_length;) { |
| 510 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); |
Christoph Hellwig | e13ec93 | 2017-09-01 17:39:14 +0200 | [diff] [blame] | 511 | ssize_t ret = kernel_write(prot_fd, buf, len, &pos); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 512 | |
| 513 | if (ret != len) { |
| 514 | pr_err("vfs_write to prot file failed: %zd\n", ret); |
| 515 | return ret < 0 ? ret : -ENODEV; |
| 516 | } |
| 517 | prot += ret; |
| 518 | } |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | static int |
| 524 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
| 525 | { |
| 526 | void *buf; |
| 527 | int rc; |
| 528 | |
| 529 | buf = (void *)__get_free_page(GFP_KERNEL); |
| 530 | if (!buf) { |
| 531 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 532 | return -ENOMEM; |
| 533 | } |
| 534 | memset(buf, 0xff, PAGE_SIZE); |
| 535 | |
| 536 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); |
| 537 | |
| 538 | free_page((unsigned long)buf); |
| 539 | |
| 540 | return rc; |
| 541 | } |
| 542 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 543 | static sense_reason_t |
Christoph Hellwig | 62e4694 | 2015-06-19 15:10:59 +0200 | [diff] [blame] | 544 | fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 545 | { |
Christoph Hellwig | 62e4694 | 2015-06-19 15:10:59 +0200 | [diff] [blame] | 546 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 547 | struct inode *inode = file->f_mapping->host; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 548 | int ret; |
| 549 | |
Jiang Yi | 594e25e | 2017-08-11 11:29:44 +0800 | [diff] [blame] | 550 | if (!nolb) { |
| 551 | return 0; |
| 552 | } |
| 553 | |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 554 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
| 555 | ret = fd_do_prot_unmap(cmd, lba, nolb); |
| 556 | if (ret) |
| 557 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 558 | } |
| 559 | |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 560 | if (S_ISBLK(inode->i_mode)) { |
| 561 | /* The backend is block device, use discard */ |
| 562 | struct block_device *bdev = inode->i_bdev; |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 563 | struct se_device *dev = cmd->se_dev; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 564 | |
Mike Christie | 8a9ebe7 | 2016-01-18 14:09:27 -0600 | [diff] [blame] | 565 | ret = blkdev_issue_discard(bdev, |
| 566 | target_to_linux_sector(dev, lba), |
| 567 | target_to_linux_sector(dev, nolb), |
| 568 | GFP_KERNEL, 0); |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 569 | if (ret < 0) { |
| 570 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", |
| 571 | ret); |
| 572 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 573 | } |
| 574 | } else { |
| 575 | /* The backend is normal file, use fallocate */ |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 576 | struct se_device *se_dev = cmd->se_dev; |
| 577 | loff_t pos = lba * se_dev->dev_attrib.block_size; |
Asias He | 70d3ae5c | 2013-02-25 14:03:42 +0800 | [diff] [blame] | 578 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
| 579 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| 580 | |
| 581 | if (!file->f_op->fallocate) |
| 582 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 583 | |
| 584 | ret = file->f_op->fallocate(file, mode, pos, len); |
| 585 | if (ret < 0) { |
| 586 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); |
| 587 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 588 | } |
| 589 | } |
| 590 | |
Asias He | 43f55bb | 2013-02-25 14:03:44 +0800 | [diff] [blame] | 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static sense_reason_t |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 595 | fd_execute_rw_buffered(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 596 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 597 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | struct se_device *dev = cmd->se_dev; |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 599 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 600 | struct file *file = fd_dev->fd_file; |
| 601 | struct file *pfile = fd_dev->fd_prot_file; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 602 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 603 | int ret = 0; |
Nicholas Bellinger | 046ba64 | 2015-01-06 16:10:37 -0800 | [diff] [blame] | 604 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 605 | * Call vectorized fileio functions to map struct scatterlist |
| 606 | * physical memory addresses to struct iovec virtual memory. |
| 607 | */ |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 608 | if (data_direction == DMA_FROM_DEVICE) { |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 609 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 610 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
| 611 | cmd->t_prot_sg, cmd->t_prot_nents, |
| 612 | cmd->prot_length, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 613 | if (ret < 0) |
| 614 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 615 | } |
| 616 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 617 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
| 618 | sgl, sgl_nents, cmd->data_length, 0); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 619 | |
Dmitry Monakhov | 056e892 | 2017-03-31 19:53:36 +0400 | [diff] [blame] | 620 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type && |
| 621 | dev->dev_attrib.pi_prot_verify) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 622 | u32 sectors = cmd->data_length >> |
| 623 | ilog2(dev->dev_attrib.block_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 624 | |
Sagi Grimberg | f75b6fa | 2015-04-19 20:27:19 +0300 | [diff] [blame] | 625 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
| 626 | 0, cmd->t_prot_sg, 0); |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 627 | if (rc) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 628 | return rc; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 629 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 630 | } else { |
Dmitry Monakhov | 056e892 | 2017-03-31 19:53:36 +0400 | [diff] [blame] | 631 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type && |
| 632 | dev->dev_attrib.pi_prot_verify) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 633 | u32 sectors = cmd->data_length >> |
| 634 | ilog2(dev->dev_attrib.block_size); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 635 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 636 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
| 637 | 0, cmd->t_prot_sg, 0); |
| 638 | if (rc) |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 639 | return rc; |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 640 | } |
| 641 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 642 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
| 643 | sgl, sgl_nents, cmd->data_length, 1); |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 644 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 645 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 646 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
| 647 | * Allow this to happen independent of WCE=0 setting. |
| 648 | */ |
Christoph Hellwig | 814e5b4 | 2015-04-20 15:00:30 +0200 | [diff] [blame] | 649 | if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) { |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 650 | loff_t start = cmd->t_task_lba * |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 651 | dev->dev_attrib.block_size; |
Zach Brown | 62d3ab4 | 2014-10-06 16:40:13 -0700 | [diff] [blame] | 652 | loff_t end; |
| 653 | |
| 654 | if (cmd->data_length) |
| 655 | end = start + cmd->data_length - 1; |
| 656 | else |
| 657 | end = LLONG_MAX; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 658 | |
Nicholas Bellinger | a4dff30 | 2012-05-30 16:25:41 -0700 | [diff] [blame] | 659 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
| 660 | } |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 661 | |
Nicholas Bellinger | ee92046 | 2015-02-28 02:44:19 -0800 | [diff] [blame] | 662 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 663 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
| 664 | cmd->t_prot_sg, cmd->t_prot_nents, |
| 665 | cmd->prot_length, 1); |
Nicholas Bellinger | 42201b5 | 2014-01-18 09:33:48 +0000 | [diff] [blame] | 666 | if (ret < 0) |
| 667 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 668 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 669 | } |
| 670 | |
Sagi Grimberg | 8287fa5 | 2015-04-19 20:27:20 +0300 | [diff] [blame] | 671 | if (ret < 0) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 672 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 673 | |
Bart Van Assche | 59ac9c0 | 2017-05-04 15:50:47 -0700 | [diff] [blame] | 674 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 675 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 676 | } |
| 677 | |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 678 | static sense_reason_t |
| 679 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 680 | enum dma_data_direction data_direction) |
| 681 | { |
| 682 | struct se_device *dev = cmd->se_dev; |
| 683 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 684 | |
| 685 | /* |
| 686 | * We are currently limited by the number of iovecs (2048) per |
| 687 | * single vfs_[writev,readv] call. |
| 688 | */ |
| 689 | if (cmd->data_length > FD_MAX_BYTES) { |
| 690 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" |
| 691 | "FD_MAX_BYTES: %u iovec count limitation\n", |
| 692 | cmd->data_length, FD_MAX_BYTES); |
| 693 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 694 | } |
| 695 | |
| 696 | if (fd_dev->fbd_flags & FDBD_HAS_ASYNC_IO) |
| 697 | return fd_execute_rw_aio(cmd, sgl, sgl_nents, data_direction); |
| 698 | return fd_execute_rw_buffered(cmd, sgl, sgl_nents, data_direction); |
| 699 | } |
| 700 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 701 | enum { |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 702 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, |
| 703 | Opt_fd_async_io, Opt_err |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 704 | }; |
| 705 | |
| 706 | static match_table_t tokens = { |
| 707 | {Opt_fd_dev_name, "fd_dev_name=%s"}, |
| 708 | {Opt_fd_dev_size, "fd_dev_size=%s"}, |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 709 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 710 | {Opt_fd_async_io, "fd_async_io=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 711 | {Opt_err, NULL} |
| 712 | }; |
| 713 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 714 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
| 715 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 717 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 718 | char *orig, *ptr, *arg_p, *opts; |
| 719 | substring_t args[MAX_OPT_ARGS]; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 720 | int ret = 0, arg, token; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 721 | |
| 722 | opts = kstrdup(page, GFP_KERNEL); |
| 723 | if (!opts) |
| 724 | return -ENOMEM; |
| 725 | |
| 726 | orig = opts; |
| 727 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 728 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 729 | if (!*ptr) |
| 730 | continue; |
| 731 | |
| 732 | token = match_token(ptr, tokens, args); |
| 733 | switch (token) { |
| 734 | case Opt_fd_dev_name: |
Al Viro | dbc6e02 | 2012-08-01 13:07:04 +0400 | [diff] [blame] | 735 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
| 736 | FD_MAX_DEV_NAME) == 0) { |
| 737 | ret = -EINVAL; |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 738 | break; |
| 739 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 740 | pr_debug("FILEIO: Referencing Path: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 741 | fd_dev->fd_dev_name); |
| 742 | fd_dev->fbd_flags |= FBDF_HAS_PATH; |
| 743 | break; |
| 744 | case Opt_fd_dev_size: |
| 745 | arg_p = match_strdup(&args[0]); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 746 | if (!arg_p) { |
| 747 | ret = -ENOMEM; |
| 748 | break; |
| 749 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 750 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
Jesper Juhl | 6d18025 | 2011-03-14 04:05:56 -0700 | [diff] [blame] | 751 | kfree(arg_p); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 752 | if (ret < 0) { |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 753 | pr_err("kstrtoull() failed for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 754 | " fd_dev_size=\n"); |
| 755 | goto out; |
| 756 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 757 | pr_debug("FILEIO: Referencing Size: %llu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 758 | " bytes\n", fd_dev->fd_dev_size); |
| 759 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; |
| 760 | break; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 761 | case Opt_fd_buffered_io: |
Joern Engel | ce31c1b | 2014-09-02 17:50:00 -0400 | [diff] [blame] | 762 | ret = match_int(args, &arg); |
| 763 | if (ret) |
| 764 | goto out; |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 765 | if (arg != 1) { |
| 766 | pr_err("bogus fd_buffered_io=%d value\n", arg); |
| 767 | ret = -EINVAL; |
| 768 | goto out; |
| 769 | } |
| 770 | |
| 771 | pr_debug("FILEIO: Using buffered I/O" |
| 772 | " operations for struct fd_dev\n"); |
| 773 | |
| 774 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; |
| 775 | break; |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 776 | case Opt_fd_async_io: |
| 777 | ret = match_int(args, &arg); |
| 778 | if (ret) |
| 779 | goto out; |
| 780 | if (arg != 1) { |
| 781 | pr_err("bogus fd_async_io=%d value\n", arg); |
| 782 | ret = -EINVAL; |
| 783 | goto out; |
| 784 | } |
| 785 | |
| 786 | pr_debug("FILEIO: Using async I/O" |
| 787 | " operations for struct fd_dev\n"); |
| 788 | |
| 789 | fd_dev->fbd_flags |= FDBD_HAS_ASYNC_IO; |
| 790 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 791 | default: |
| 792 | break; |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | out: |
| 797 | kfree(orig); |
| 798 | return (!ret) ? count : ret; |
| 799 | } |
| 800 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 801 | 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] | 802 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 803 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 804 | ssize_t bl = 0; |
| 805 | |
| 806 | bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 807 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s Async: %d\n", |
Nicholas Bellinger | b32f4c7 | 2012-09-29 17:15:37 -0700 | [diff] [blame] | 808 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
| 809 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? |
Andrei Vagin | 769031c | 2018-03-21 23:55:02 -0700 | [diff] [blame] | 810 | "Buffered-WCE" : "O_DSYNC", |
| 811 | !!(fd_dev->fbd_flags & FDBD_HAS_ASYNC_IO)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 812 | return bl; |
| 813 | } |
| 814 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 815 | static sector_t fd_get_blocks(struct se_device *dev) |
| 816 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 817 | struct fd_dev *fd_dev = FD_DEV(dev); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 818 | struct file *f = fd_dev->fd_file; |
| 819 | struct inode *i = f->f_mapping->host; |
| 820 | unsigned long long dev_size; |
| 821 | /* |
| 822 | * When using a file that references an underlying struct block_device, |
| 823 | * ensure dev_size is always based on the current inode size in order |
| 824 | * to handle underlying block_device resize operations. |
| 825 | */ |
| 826 | if (S_ISBLK(i->i_mode)) |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 827 | dev_size = i_size_read(i); |
Nicholas Bellinger | cd9323f | 2012-05-16 16:05:26 -0700 | [diff] [blame] | 828 | else |
| 829 | dev_size = fd_dev->fd_dev_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 830 | |
Nicholas Bellinger | 21363ca | 2013-05-29 21:35:23 -0700 | [diff] [blame] | 831 | return div_u64(dev_size - dev->dev_attrib.block_size, |
| 832 | dev->dev_attrib.block_size); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 833 | } |
| 834 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 835 | static int fd_init_prot(struct se_device *dev) |
| 836 | { |
| 837 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 838 | struct file *prot_file, *file = fd_dev->fd_file; |
| 839 | struct inode *inode; |
| 840 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
| 841 | char buf[FD_MAX_DEV_PROT_NAME]; |
| 842 | |
| 843 | if (!file) { |
| 844 | pr_err("Unable to locate fd_dev->fd_file\n"); |
| 845 | return -ENODEV; |
| 846 | } |
| 847 | |
| 848 | inode = file->f_mapping->host; |
| 849 | if (S_ISBLK(inode->i_mode)) { |
| 850 | pr_err("FILEIO Protection emulation only supported on" |
| 851 | " !S_ISBLK\n"); |
| 852 | return -ENOSYS; |
| 853 | } |
| 854 | |
| 855 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) |
| 856 | flags &= ~O_DSYNC; |
| 857 | |
| 858 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", |
| 859 | fd_dev->fd_dev_name); |
| 860 | |
| 861 | prot_file = filp_open(buf, flags, 0600); |
| 862 | if (IS_ERR(prot_file)) { |
| 863 | pr_err("filp_open(%s) failed\n", buf); |
| 864 | ret = PTR_ERR(prot_file); |
| 865 | return ret; |
| 866 | } |
| 867 | fd_dev->fd_prot_file = prot_file; |
| 868 | |
| 869 | return 0; |
| 870 | } |
| 871 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 872 | static int fd_format_prot(struct se_device *dev) |
| 873 | { |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 874 | unsigned char *buf; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 875 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 876 | int ret; |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 877 | |
| 878 | if (!dev->dev_attrib.pi_prot_type) { |
| 879 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); |
| 880 | return -ENODEV; |
| 881 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 882 | |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 883 | buf = vzalloc(unit_size); |
| 884 | if (!buf) { |
| 885 | pr_err("Unable to allocate FILEIO prot buf\n"); |
| 886 | return -ENOMEM; |
| 887 | } |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 888 | |
| 889 | pr_debug("Using FILEIO prot_length: %llu\n", |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 890 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
| 891 | dev->prot_length); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 892 | |
Sagi Grimberg | 80dcd0c | 2014-02-19 17:50:16 +0200 | [diff] [blame] | 893 | memset(buf, 0xff, unit_size); |
Akinobu Mita | 64d240b | 2015-04-13 23:21:58 +0900 | [diff] [blame] | 894 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
| 895 | buf, unit_size); |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 896 | vfree(buf); |
| 897 | return ret; |
| 898 | } |
| 899 | |
| 900 | static void fd_free_prot(struct se_device *dev) |
| 901 | { |
| 902 | struct fd_dev *fd_dev = FD_DEV(dev); |
| 903 | |
| 904 | if (!fd_dev->fd_prot_file) |
| 905 | return; |
| 906 | |
| 907 | filp_close(fd_dev->fd_prot_file, NULL); |
| 908 | fd_dev->fd_prot_file = NULL; |
| 909 | } |
| 910 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 911 | static struct sbc_ops fd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 912 | .execute_rw = fd_execute_rw, |
Christoph Hellwig | ad67f0d | 2012-06-17 18:40:53 -0400 | [diff] [blame] | 913 | .execute_sync_cache = fd_execute_sync_cache, |
Nicholas Bellinger | 7b745c8 | 2013-02-19 17:30:34 -0800 | [diff] [blame] | 914 | .execute_write_same = fd_execute_write_same, |
Asias He | 5064276 | 2013-02-25 14:03:43 +0800 | [diff] [blame] | 915 | .execute_unmap = fd_execute_unmap, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 916 | }; |
| 917 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 918 | static sense_reason_t |
| 919 | fd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 920 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 921 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 922 | } |
| 923 | |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 924 | static const struct target_backend_ops fileio_ops = { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 925 | .name = "fileio", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 926 | .inquiry_prod = "FILEIO", |
| 927 | .inquiry_rev = FD_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 928 | .owner = THIS_MODULE, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 929 | .attach_hba = fd_attach_hba, |
| 930 | .detach_hba = fd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 931 | .alloc_device = fd_alloc_device, |
| 932 | .configure_device = fd_configure_device, |
Mike Christie | 9263470 | 2017-06-23 01:18:12 -0500 | [diff] [blame] | 933 | .destroy_device = fd_destroy_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 934 | .free_device = fd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 935 | .parse_cdb = fd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 936 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
| 937 | .show_configfs_dev_params = fd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 938 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 939 | .get_blocks = fd_get_blocks, |
Nicholas Bellinger | 0f5e2ec | 2014-01-18 09:32:56 +0000 | [diff] [blame] | 940 | .init_prot = fd_init_prot, |
| 941 | .format_prot = fd_format_prot, |
| 942 | .free_prot = fd_free_prot, |
Christoph Hellwig | 5873c4d | 2015-05-10 18:14:57 +0200 | [diff] [blame] | 943 | .tb_dev_attrib_attrs = sbc_attrib_attrs, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 944 | }; |
| 945 | |
| 946 | static int __init fileio_module_init(void) |
| 947 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 948 | return transport_backend_register(&fileio_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 949 | } |
| 950 | |
Asias He | 63b91d5 | 2013-02-27 12:50:56 +0800 | [diff] [blame] | 951 | static void __exit fileio_module_exit(void) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 952 | { |
Christoph Hellwig | 0a06d43 | 2015-05-10 18:14:56 +0200 | [diff] [blame] | 953 | target_backend_unregister(&fileio_ops); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); |
| 957 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
| 958 | MODULE_LICENSE("GPL"); |
| 959 | |
| 960 | module_init(fileio_module_init); |
| 961 | module_exit(fileio_module_exit); |