Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_file.c | |
3 | * | |
4 | * This file contains the Storage Engine <-> FILEIO transport specific functions | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2005-2013 Datera, Inc. |
c66ac9db NB |
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 | ||
c66ac9db NB |
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> | |
827509e3 | 32 | #include <linux/module.h> |
5538d294 | 33 | #include <linux/vmalloc.h> |
70d3ae5c | 34 | #include <linux/falloc.h> |
8dcf07be | 35 | #include <linux/uio.h> |
ba929992 | 36 | #include <scsi/scsi_proto.h> |
50642762 | 37 | #include <asm/unaligned.h> |
c66ac9db NB |
38 | |
39 | #include <target/target_core_base.h> | |
c4795fb2 | 40 | #include <target/target_core_backend.h> |
c66ac9db NB |
41 | |
42 | #include "target_core_file.h" | |
43 | ||
0fd97ccf CH |
44 | static inline struct fd_dev *FD_DEV(struct se_device *dev) |
45 | { | |
46 | return container_of(dev, struct fd_dev, dev); | |
47 | } | |
c66ac9db | 48 | |
c66ac9db NB |
49 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) |
50 | { | |
51 | struct fd_host *fd_host; | |
52 | ||
53 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); | |
6708bb27 AG |
54 | if (!fd_host) { |
55 | pr_err("Unable to allocate memory for struct fd_host\n"); | |
e3d6f909 | 56 | return -ENOMEM; |
c66ac9db NB |
57 | } |
58 | ||
59 | fd_host->fd_host_id = host_id; | |
60 | ||
e3d6f909 | 61 | hba->hba_ptr = fd_host; |
c66ac9db | 62 | |
6708bb27 | 63 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
c66ac9db | 64 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
ce8dd25d | 65 | TARGET_CORE_VERSION); |
95cadace NB |
66 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
67 | hba->hba_id, fd_host->fd_host_id); | |
c66ac9db NB |
68 | |
69 | return 0; | |
70 | } | |
71 | ||
72 | static void fd_detach_hba(struct se_hba *hba) | |
73 | { | |
74 | struct fd_host *fd_host = hba->hba_ptr; | |
75 | ||
6708bb27 | 76 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
c66ac9db NB |
77 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
78 | ||
79 | kfree(fd_host); | |
80 | hba->hba_ptr = NULL; | |
81 | } | |
82 | ||
0fd97ccf | 83 | static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) |
c66ac9db NB |
84 | { |
85 | struct fd_dev *fd_dev; | |
8359cf43 | 86 | struct fd_host *fd_host = hba->hba_ptr; |
c66ac9db NB |
87 | |
88 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); | |
6708bb27 AG |
89 | if (!fd_dev) { |
90 | pr_err("Unable to allocate memory for struct fd_dev\n"); | |
c66ac9db NB |
91 | return NULL; |
92 | } | |
93 | ||
94 | fd_dev->fd_host = fd_host; | |
95 | ||
6708bb27 | 96 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
c66ac9db | 97 | |
0fd97ccf | 98 | return &fd_dev->dev; |
c66ac9db NB |
99 | } |
100 | ||
0fd97ccf | 101 | static int fd_configure_device(struct se_device *dev) |
c66ac9db | 102 | { |
0fd97ccf CH |
103 | struct fd_dev *fd_dev = FD_DEV(dev); |
104 | struct fd_host *fd_host = dev->se_hba->hba_ptr; | |
c66ac9db NB |
105 | struct file *file; |
106 | struct inode *inode = NULL; | |
0fd97ccf | 107 | int flags, ret = -EINVAL; |
c66ac9db | 108 | |
0fd97ccf CH |
109 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
110 | pr_err("Missing fd_dev_name=\n"); | |
111 | return -EINVAL; | |
112 | } | |
c66ac9db | 113 | |
c66ac9db | 114 | /* |
a4dff304 NB |
115 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
116 | * of pure timestamp updates. | |
c66ac9db | 117 | */ |
a4dff304 | 118 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
0fd97ccf | 119 | |
b32f4c7e NB |
120 | /* |
121 | * Optionally allow fd_buffered_io=1 to be enabled for people | |
122 | * who want use the fs buffer cache as an WriteCache mechanism. | |
123 | * | |
124 | * This means that in event of a hard failure, there is a risk | |
125 | * of silent data-loss if the SCSI client has *not* performed a | |
126 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE | |
127 | * to write-out the entire device cache. | |
128 | */ | |
129 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { | |
130 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); | |
131 | flags &= ~O_DSYNC; | |
132 | } | |
c66ac9db | 133 | |
dbc6e022 | 134 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
613640e4 | 135 | if (IS_ERR(file)) { |
dbc6e022 | 136 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
613640e4 NB |
137 | ret = PTR_ERR(file); |
138 | goto fail; | |
139 | } | |
c66ac9db NB |
140 | fd_dev->fd_file = file; |
141 | /* | |
142 | * If using a block backend with this struct file, we extract | |
143 | * fd_dev->fd_[block,dev]_size from struct block_device. | |
144 | * | |
145 | * Otherwise, we use the passed fd_size= from configfs | |
146 | */ | |
147 | inode = file->f_mapping->host; | |
148 | if (S_ISBLK(inode->i_mode)) { | |
0fd97ccf | 149 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
cd9323fd | 150 | unsigned long long dev_size; |
0fd97ccf | 151 | |
21363ca8 | 152 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
c66ac9db NB |
153 | /* |
154 | * Determine the number of bytes from i_size_read() minus | |
155 | * one (1) logical sector from underlying struct block_device | |
156 | */ | |
cd9323fd | 157 | dev_size = (i_size_read(file->f_mapping->host) - |
c66ac9db NB |
158 | fd_dev->fd_block_size); |
159 | ||
6708bb27 | 160 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
c66ac9db | 161 | " block_device blocks: %llu logical_block_size: %d\n", |
cd9323fd | 162 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
c66ac9db | 163 | fd_dev->fd_block_size); |
8a9ebe71 | 164 | |
ea263c7f | 165 | if (target_configure_unmap_from_queue(&dev->dev_attrib, q)) |
70d3ae5c | 166 | pr_debug("IFILE: BLOCK Discard support available," |
8a9ebe71 | 167 | " disabled by default\n"); |
70d3ae5c AH |
168 | /* |
169 | * Enable write same emulation for IBLOCK and use 0xFFFF as | |
170 | * the smaller WRITE_SAME(10) only has a two-byte block count. | |
171 | */ | |
172 | dev->dev_attrib.max_write_same_len = 0xFFFF; | |
0463a3fe AH |
173 | |
174 | if (blk_queue_nonrot(q)) | |
175 | dev->dev_attrib.is_nonrot = 1; | |
c66ac9db NB |
176 | } else { |
177 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { | |
6708bb27 | 178 | pr_err("FILEIO: Missing fd_dev_size=" |
c66ac9db NB |
179 | " parameter, and no backing struct" |
180 | " block_device\n"); | |
181 | goto fail; | |
182 | } | |
183 | ||
21363ca8 | 184 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
70d3ae5c AH |
185 | /* |
186 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) | |
187 | */ | |
188 | dev->dev_attrib.max_unmap_lba_count = 0x2000; | |
189 | /* | |
190 | * Currently hardcoded to 1 in Linux/SCSI code.. | |
191 | */ | |
192 | dev->dev_attrib.max_unmap_block_desc_count = 1; | |
193 | dev->dev_attrib.unmap_granularity = 1; | |
194 | dev->dev_attrib.unmap_granularity_alignment = 0; | |
195 | ||
196 | /* | |
197 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) | |
198 | * based upon struct iovec limit for vfs_writev() | |
199 | */ | |
200 | dev->dev_attrib.max_write_same_len = 0x1000; | |
c66ac9db NB |
201 | } |
202 | ||
21363ca8 | 203 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
95cadace NB |
204 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
205 | dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; | |
0fd97ccf | 206 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
c66ac9db | 207 | |
b32f4c7e NB |
208 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
209 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" | |
210 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); | |
0fd97ccf | 211 | dev->dev_attrib.emulate_write_cache = 1; |
b32f4c7e NB |
212 | } |
213 | ||
c66ac9db NB |
214 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
215 | fd_dev->fd_queue_depth = dev->queue_depth; | |
216 | ||
6708bb27 | 217 | pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," |
c66ac9db NB |
218 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
219 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); | |
220 | ||
0fd97ccf | 221 | return 0; |
c66ac9db NB |
222 | fail: |
223 | if (fd_dev->fd_file) { | |
224 | filp_close(fd_dev->fd_file, NULL); | |
225 | fd_dev->fd_file = NULL; | |
226 | } | |
0fd97ccf | 227 | return ret; |
c66ac9db NB |
228 | } |
229 | ||
4cc987ea | 230 | static void fd_dev_call_rcu(struct rcu_head *p) |
c66ac9db | 231 | { |
4cc987ea | 232 | struct se_device *dev = container_of(p, struct se_device, rcu_head); |
0fd97ccf | 233 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db | 234 | |
c66ac9db NB |
235 | kfree(fd_dev); |
236 | } | |
237 | ||
0fd97ccf | 238 | static void fd_free_device(struct se_device *dev) |
92634706 MC |
239 | { |
240 | call_rcu(&dev->rcu_head, fd_dev_call_rcu); | |
241 | } | |
242 | ||
243 | static void fd_destroy_device(struct se_device *dev) | |
42201b55 | 244 | { |
0fd97ccf | 245 | struct fd_dev *fd_dev = FD_DEV(dev); |
42201b55 | 246 | |
c66ac9db NB |
247 | if (fd_dev->fd_file) { |
248 | filp_close(fd_dev->fd_file, NULL); | |
249 | fd_dev->fd_file = NULL; | |
42201b55 | 250 | } |
42201b55 NB |
251 | } |
252 | ||
769031c9 AV |
253 | struct target_core_file_cmd { |
254 | unsigned long len; | |
255 | struct se_cmd *cmd; | |
256 | struct kiocb iocb; | |
257 | }; | |
258 | ||
259 | static void cmd_rw_aio_complete(struct kiocb *iocb, long ret, long ret2) | |
260 | { | |
261 | struct target_core_file_cmd *cmd; | |
262 | ||
263 | cmd = container_of(iocb, struct target_core_file_cmd, iocb); | |
264 | ||
265 | if (ret != cmd->len) | |
266 | target_complete_cmd(cmd->cmd, SAM_STAT_CHECK_CONDITION); | |
267 | else | |
268 | target_complete_cmd(cmd->cmd, SAM_STAT_GOOD); | |
269 | ||
270 | kfree(cmd); | |
271 | } | |
272 | ||
273 | static sense_reason_t | |
274 | fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
275 | enum dma_data_direction data_direction) | |
276 | { | |
277 | int is_write = !(data_direction == DMA_FROM_DEVICE); | |
278 | struct se_device *dev = cmd->se_dev; | |
279 | struct fd_dev *fd_dev = FD_DEV(dev); | |
280 | struct file *file = fd_dev->fd_file; | |
281 | struct target_core_file_cmd *aio_cmd; | |
282 | struct iov_iter iter = {}; | |
283 | struct scatterlist *sg; | |
284 | struct bio_vec *bvec; | |
285 | ssize_t len = 0; | |
286 | int ret = 0, i; | |
287 | ||
288 | aio_cmd = kmalloc(sizeof(struct target_core_file_cmd), GFP_KERNEL); | |
289 | if (!aio_cmd) | |
290 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
291 | ||
292 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); | |
293 | if (!bvec) { | |
294 | kfree(aio_cmd); | |
295 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
296 | } | |
297 | ||
298 | for_each_sg(sgl, sg, sgl_nents, i) { | |
299 | bvec[i].bv_page = sg_page(sg); | |
300 | bvec[i].bv_len = sg->length; | |
301 | bvec[i].bv_offset = sg->offset; | |
302 | ||
303 | len += sg->length; | |
304 | } | |
305 | ||
aa563d7b | 306 | iov_iter_bvec(&iter, is_write, bvec, sgl_nents, len); |
769031c9 AV |
307 | |
308 | aio_cmd->cmd = cmd; | |
309 | aio_cmd->len = len; | |
310 | aio_cmd->iocb.ki_pos = cmd->t_task_lba * dev->dev_attrib.block_size; | |
311 | aio_cmd->iocb.ki_filp = file; | |
312 | aio_cmd->iocb.ki_complete = cmd_rw_aio_complete; | |
313 | aio_cmd->iocb.ki_flags = IOCB_DIRECT; | |
314 | ||
315 | if (is_write && (cmd->se_cmd_flags & SCF_FUA)) | |
316 | aio_cmd->iocb.ki_flags |= IOCB_DSYNC; | |
317 | ||
318 | if (is_write) | |
319 | ret = call_write_iter(file, &aio_cmd->iocb, &iter); | |
320 | else | |
321 | ret = call_read_iter(file, &aio_cmd->iocb, &iter); | |
322 | ||
323 | kfree(bvec); | |
324 | ||
325 | if (ret != -EIOCBQUEUED) | |
326 | cmd_rw_aio_complete(&aio_cmd->iocb, ret, 0); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
8287fa5f SG |
331 | static int fd_do_rw(struct se_cmd *cmd, struct file *fd, |
332 | u32 block_size, struct scatterlist *sgl, | |
333 | u32 sgl_nents, u32 data_length, int is_write) | |
c66ac9db | 334 | { |
5787cacd | 335 | struct scatterlist *sg; |
6b9a44d0 CH |
336 | struct iov_iter iter; |
337 | struct bio_vec *bvec; | |
338 | ssize_t len = 0; | |
8287fa5f | 339 | loff_t pos = (cmd->t_task_lba * block_size); |
c66ac9db NB |
340 | int ret = 0, i; |
341 | ||
6b9a44d0 CH |
342 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
343 | if (!bvec) { | |
6708bb27 | 344 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
e3d6f909 | 345 | return -ENOMEM; |
c66ac9db NB |
346 | } |
347 | ||
5787cacd | 348 | for_each_sg(sgl, sg, sgl_nents, i) { |
6b9a44d0 CH |
349 | bvec[i].bv_page = sg_page(sg); |
350 | bvec[i].bv_len = sg->length; | |
351 | bvec[i].bv_offset = sg->offset; | |
c66ac9db | 352 | |
6b9a44d0 CH |
353 | len += sg->length; |
354 | } | |
778229af | 355 | |
aa563d7b | 356 | iov_iter_bvec(&iter, READ, bvec, sgl_nents, len); |
778229af | 357 | if (is_write) |
abbb6589 | 358 | ret = vfs_iter_write(fd, &iter, &pos, 0); |
778229af | 359 | else |
18e9710e | 360 | ret = vfs_iter_read(fd, &iter, &pos, 0); |
778229af | 361 | |
778229af | 362 | if (is_write) { |
8287fa5f | 363 | if (ret < 0 || ret != data_length) { |
778229af | 364 | pr_err("%s() write returned %d\n", __func__, ret); |
f11b55d1 DM |
365 | if (ret >= 0) |
366 | ret = -EINVAL; | |
c66ac9db NB |
367 | } |
368 | } else { | |
778229af SAS |
369 | /* |
370 | * Return zeros and GOOD status even if the READ did not return | |
371 | * the expected virt_size for struct file w/o a backing struct | |
372 | * block_device. | |
373 | */ | |
496ad9aa | 374 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
8287fa5f | 375 | if (ret < 0 || ret != data_length) { |
778229af SAS |
376 | pr_err("%s() returned %d, expecting %u for " |
377 | "S_ISBLK\n", __func__, ret, | |
8287fa5f | 378 | data_length); |
f11b55d1 DM |
379 | if (ret >= 0) |
380 | ret = -EINVAL; | |
778229af SAS |
381 | } |
382 | } else { | |
383 | if (ret < 0) { | |
384 | pr_err("%s() returned %d for non S_ISBLK\n", | |
385 | __func__, ret); | |
f11b55d1 DM |
386 | } else if (ret != data_length) { |
387 | /* | |
388 | * Short read case: | |
389 | * Probably some one truncate file under us. | |
390 | * We must explicitly zero sg-pages to prevent | |
391 | * expose uninizialized pages to userspace. | |
392 | */ | |
393 | if (ret < data_length) | |
394 | ret += iov_iter_zero(data_length - ret, &iter); | |
395 | else | |
396 | ret = -EINVAL; | |
778229af | 397 | } |
c66ac9db NB |
398 | } |
399 | } | |
f11b55d1 DM |
400 | kfree(bvec); |
401 | return ret; | |
c66ac9db NB |
402 | } |
403 | ||
de103c93 CH |
404 | static sense_reason_t |
405 | fd_execute_sync_cache(struct se_cmd *cmd) | |
c66ac9db | 406 | { |
c66ac9db | 407 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 408 | struct fd_dev *fd_dev = FD_DEV(dev); |
a1d8b49a | 409 | int immed = (cmd->t_task_cdb[1] & 0x2); |
c66ac9db NB |
410 | loff_t start, end; |
411 | int ret; | |
412 | ||
413 | /* | |
414 | * If the Immediate bit is set, queue up the GOOD response | |
415 | * for this SYNCHRONIZE_CACHE op | |
416 | */ | |
417 | if (immed) | |
5787cacd | 418 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
c66ac9db NB |
419 | |
420 | /* | |
421 | * Determine if we will be flushing the entire device. | |
422 | */ | |
a1d8b49a | 423 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
c66ac9db NB |
424 | start = 0; |
425 | end = LLONG_MAX; | |
426 | } else { | |
0fd97ccf | 427 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
c66ac9db | 428 | if (cmd->data_length) |
62d3ab49 | 429 | end = start + cmd->data_length - 1; |
c66ac9db NB |
430 | else |
431 | end = LLONG_MAX; | |
432 | } | |
433 | ||
434 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); | |
435 | if (ret != 0) | |
6708bb27 | 436 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
c66ac9db | 437 | |
5787cacd | 438 | if (immed) |
ad67f0d9 | 439 | return 0; |
5787cacd | 440 | |
de103c93 | 441 | if (ret) |
5787cacd | 442 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
de103c93 | 443 | else |
5787cacd | 444 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
ad67f0d9 CH |
445 | |
446 | return 0; | |
c66ac9db NB |
447 | } |
448 | ||
7b745c84 NB |
449 | static sense_reason_t |
450 | fd_execute_write_same(struct se_cmd *cmd) | |
451 | { | |
452 | struct se_device *se_dev = cmd->se_dev; | |
453 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
7b745c84 | 454 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
d4c5dcac CH |
455 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
456 | struct iov_iter iter; | |
457 | struct bio_vec *bvec; | |
458 | unsigned int len = 0, i; | |
459 | ssize_t ret; | |
7b745c84 NB |
460 | |
461 | if (!nolb) { | |
462 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
463 | return 0; | |
464 | } | |
afd73f1b NB |
465 | if (cmd->prot_op) { |
466 | pr_err("WRITE_SAME: Protection information with FILEIO" | |
467 | " backends not supported\n"); | |
468 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
469 | } | |
7b745c84 NB |
470 | |
471 | if (cmd->t_data_nents > 1 || | |
d4c5dcac | 472 | cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { |
7b745c84 | 473 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
d4c5dcac CH |
474 | " block_size: %u\n", |
475 | cmd->t_data_nents, | |
476 | cmd->t_data_sg[0].length, | |
7b745c84 NB |
477 | cmd->se_dev->dev_attrib.block_size); |
478 | return TCM_INVALID_CDB_FIELD; | |
479 | } | |
480 | ||
d4c5dcac CH |
481 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
482 | if (!bvec) | |
7b745c84 NB |
483 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
484 | ||
d4c5dcac CH |
485 | for (i = 0; i < nolb; i++) { |
486 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); | |
487 | bvec[i].bv_len = cmd->t_data_sg[0].length; | |
488 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; | |
7b745c84 | 489 | |
d4c5dcac CH |
490 | len += se_dev->dev_attrib.block_size; |
491 | } | |
7b745c84 | 492 | |
aa563d7b | 493 | iov_iter_bvec(&iter, READ, bvec, nolb, len); |
abbb6589 | 494 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0); |
7b745c84 | 495 | |
d4c5dcac CH |
496 | kfree(bvec); |
497 | if (ret < 0 || ret != len) { | |
498 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); | |
7b745c84 NB |
499 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
500 | } | |
501 | ||
502 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
503 | return 0; | |
504 | } | |
505 | ||
64d240b7 AM |
506 | static int |
507 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, | |
508 | void *buf, size_t bufsize) | |
509 | { | |
510 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
511 | struct file *prot_fd = fd_dev->fd_prot_file; | |
512 | sector_t prot_length, prot; | |
513 | loff_t pos = lba * se_dev->prot_length; | |
514 | ||
515 | if (!prot_fd) { | |
516 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); | |
517 | return -ENODEV; | |
518 | } | |
519 | ||
520 | prot_length = nolb * se_dev->prot_length; | |
521 | ||
522 | for (prot = 0; prot < prot_length;) { | |
523 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); | |
e13ec939 | 524 | ssize_t ret = kernel_write(prot_fd, buf, len, &pos); |
64d240b7 AM |
525 | |
526 | if (ret != len) { | |
527 | pr_err("vfs_write to prot file failed: %zd\n", ret); | |
528 | return ret < 0 ? ret : -ENODEV; | |
529 | } | |
530 | prot += ret; | |
531 | } | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | static int | |
537 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) | |
538 | { | |
539 | void *buf; | |
540 | int rc; | |
541 | ||
542 | buf = (void *)__get_free_page(GFP_KERNEL); | |
543 | if (!buf) { | |
544 | pr_err("Unable to allocate FILEIO prot buf\n"); | |
545 | return -ENOMEM; | |
546 | } | |
547 | memset(buf, 0xff, PAGE_SIZE); | |
548 | ||
549 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); | |
550 | ||
551 | free_page((unsigned long)buf); | |
552 | ||
553 | return rc; | |
554 | } | |
555 | ||
70d3ae5c | 556 | static sense_reason_t |
62e46942 | 557 | fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) |
70d3ae5c | 558 | { |
62e46942 | 559 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
70d3ae5c | 560 | struct inode *inode = file->f_mapping->host; |
70d3ae5c AH |
561 | int ret; |
562 | ||
594e25e7 JY |
563 | if (!nolb) { |
564 | return 0; | |
565 | } | |
566 | ||
64d240b7 AM |
567 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
568 | ret = fd_do_prot_unmap(cmd, lba, nolb); | |
569 | if (ret) | |
570 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
571 | } | |
572 | ||
70d3ae5c AH |
573 | if (S_ISBLK(inode->i_mode)) { |
574 | /* The backend is block device, use discard */ | |
575 | struct block_device *bdev = inode->i_bdev; | |
8a9ebe71 | 576 | struct se_device *dev = cmd->se_dev; |
70d3ae5c | 577 | |
8a9ebe71 MC |
578 | ret = blkdev_issue_discard(bdev, |
579 | target_to_linux_sector(dev, lba), | |
580 | target_to_linux_sector(dev, nolb), | |
581 | GFP_KERNEL, 0); | |
70d3ae5c AH |
582 | if (ret < 0) { |
583 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", | |
584 | ret); | |
585 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
586 | } | |
587 | } else { | |
588 | /* The backend is normal file, use fallocate */ | |
43f55bbb AH |
589 | struct se_device *se_dev = cmd->se_dev; |
590 | loff_t pos = lba * se_dev->dev_attrib.block_size; | |
70d3ae5c AH |
591 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
592 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; | |
593 | ||
594 | if (!file->f_op->fallocate) | |
595 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
596 | ||
597 | ret = file->f_op->fallocate(file, mode, pos, len); | |
598 | if (ret < 0) { | |
599 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); | |
600 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
601 | } | |
602 | } | |
603 | ||
43f55bbb AH |
604 | return 0; |
605 | } | |
606 | ||
de103c93 | 607 | static sense_reason_t |
769031c9 | 608 | fd_execute_rw_buffered(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
a82a9538 | 609 | enum dma_data_direction data_direction) |
c66ac9db | 610 | { |
c66ac9db | 611 | struct se_device *dev = cmd->se_dev; |
8287fa5f SG |
612 | struct fd_dev *fd_dev = FD_DEV(dev); |
613 | struct file *file = fd_dev->fd_file; | |
614 | struct file *pfile = fd_dev->fd_prot_file; | |
42201b55 | 615 | sense_reason_t rc; |
c66ac9db | 616 | int ret = 0; |
c66ac9db NB |
617 | /* |
618 | * Call vectorized fileio functions to map struct scatterlist | |
619 | * physical memory addresses to struct iovec virtual memory. | |
620 | */ | |
5787cacd | 621 | if (data_direction == DMA_FROM_DEVICE) { |
ee920469 | 622 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
8287fa5f SG |
623 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
624 | cmd->t_prot_sg, cmd->t_prot_nents, | |
625 | cmd->prot_length, 0); | |
42201b55 NB |
626 | if (ret < 0) |
627 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
628 | } | |
629 | ||
8287fa5f SG |
630 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
631 | sgl, sgl_nents, cmd->data_length, 0); | |
42201b55 | 632 | |
056e8924 DM |
633 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type && |
634 | dev->dev_attrib.pi_prot_verify) { | |
8287fa5f SG |
635 | u32 sectors = cmd->data_length >> |
636 | ilog2(dev->dev_attrib.block_size); | |
42201b55 | 637 | |
f75b6fae | 638 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
8287fa5f SG |
639 | 0, cmd->t_prot_sg, 0); |
640 | if (rc) | |
42201b55 | 641 | return rc; |
42201b55 | 642 | } |
c66ac9db | 643 | } else { |
056e8924 DM |
644 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type && |
645 | dev->dev_attrib.pi_prot_verify) { | |
8287fa5f SG |
646 | u32 sectors = cmd->data_length >> |
647 | ilog2(dev->dev_attrib.block_size); | |
42201b55 | 648 | |
f75b6fae SG |
649 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
650 | 0, cmd->t_prot_sg, 0); | |
8287fa5f | 651 | if (rc) |
42201b55 | 652 | return rc; |
42201b55 NB |
653 | } |
654 | ||
8287fa5f SG |
655 | ret = fd_do_rw(cmd, file, dev->dev_attrib.block_size, |
656 | sgl, sgl_nents, cmd->data_length, 1); | |
a4dff304 | 657 | /* |
125d0119 | 658 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
a4dff304 NB |
659 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
660 | * Allow this to happen independent of WCE=0 setting. | |
661 | */ | |
814e5b45 | 662 | if (ret > 0 && (cmd->se_cmd_flags & SCF_FUA)) { |
a4dff304 | 663 | loff_t start = cmd->t_task_lba * |
0fd97ccf | 664 | dev->dev_attrib.block_size; |
62d3ab49 ZB |
665 | loff_t end; |
666 | ||
667 | if (cmd->data_length) | |
668 | end = start + cmd->data_length - 1; | |
669 | else | |
670 | end = LLONG_MAX; | |
c66ac9db | 671 | |
a4dff304 NB |
672 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
673 | } | |
42201b55 | 674 | |
ee920469 | 675 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
8287fa5f SG |
676 | ret = fd_do_rw(cmd, pfile, dev->prot_length, |
677 | cmd->t_prot_sg, cmd->t_prot_nents, | |
678 | cmd->prot_length, 1); | |
42201b55 NB |
679 | if (ret < 0) |
680 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
681 | } | |
c66ac9db NB |
682 | } |
683 | ||
8287fa5f | 684 | if (ret < 0) |
de103c93 CH |
685 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
686 | ||
59ac9c07 | 687 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
03e98c9e | 688 | return 0; |
c66ac9db NB |
689 | } |
690 | ||
769031c9 AV |
691 | static sense_reason_t |
692 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
693 | enum dma_data_direction data_direction) | |
694 | { | |
695 | struct se_device *dev = cmd->se_dev; | |
696 | struct fd_dev *fd_dev = FD_DEV(dev); | |
697 | ||
698 | /* | |
699 | * We are currently limited by the number of iovecs (2048) per | |
700 | * single vfs_[writev,readv] call. | |
701 | */ | |
702 | if (cmd->data_length > FD_MAX_BYTES) { | |
703 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" | |
704 | "FD_MAX_BYTES: %u iovec count limitation\n", | |
705 | cmd->data_length, FD_MAX_BYTES); | |
706 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
707 | } | |
708 | ||
709 | if (fd_dev->fbd_flags & FDBD_HAS_ASYNC_IO) | |
710 | return fd_execute_rw_aio(cmd, sgl, sgl_nents, data_direction); | |
711 | return fd_execute_rw_buffered(cmd, sgl, sgl_nents, data_direction); | |
712 | } | |
713 | ||
c66ac9db | 714 | enum { |
769031c9 AV |
715 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, |
716 | Opt_fd_async_io, Opt_err | |
c66ac9db NB |
717 | }; |
718 | ||
719 | static match_table_t tokens = { | |
720 | {Opt_fd_dev_name, "fd_dev_name=%s"}, | |
721 | {Opt_fd_dev_size, "fd_dev_size=%s"}, | |
b32f4c7e | 722 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
769031c9 | 723 | {Opt_fd_async_io, "fd_async_io=%d"}, |
c66ac9db NB |
724 | {Opt_err, NULL} |
725 | }; | |
726 | ||
0fd97ccf CH |
727 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
728 | const char *page, ssize_t count) | |
c66ac9db | 729 | { |
0fd97ccf | 730 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
731 | char *orig, *ptr, *arg_p, *opts; |
732 | substring_t args[MAX_OPT_ARGS]; | |
b32f4c7e | 733 | int ret = 0, arg, token; |
c66ac9db NB |
734 | |
735 | opts = kstrdup(page, GFP_KERNEL); | |
736 | if (!opts) | |
737 | return -ENOMEM; | |
738 | ||
739 | orig = opts; | |
740 | ||
90c161b6 | 741 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
742 | if (!*ptr) |
743 | continue; | |
744 | ||
745 | token = match_token(ptr, tokens, args); | |
746 | switch (token) { | |
747 | case Opt_fd_dev_name: | |
dbc6e022 AV |
748 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
749 | FD_MAX_DEV_NAME) == 0) { | |
750 | ret = -EINVAL; | |
6d180253 JJ |
751 | break; |
752 | } | |
6708bb27 | 753 | pr_debug("FILEIO: Referencing Path: %s\n", |
c66ac9db NB |
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]); | |
6d180253 JJ |
759 | if (!arg_p) { |
760 | ret = -ENOMEM; | |
761 | break; | |
762 | } | |
57103d7f | 763 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
6d180253 | 764 | kfree(arg_p); |
c66ac9db | 765 | if (ret < 0) { |
57103d7f | 766 | pr_err("kstrtoull() failed for" |
c66ac9db NB |
767 | " fd_dev_size=\n"); |
768 | goto out; | |
769 | } | |
6708bb27 | 770 | pr_debug("FILEIO: Referencing Size: %llu" |
c66ac9db NB |
771 | " bytes\n", fd_dev->fd_dev_size); |
772 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; | |
773 | break; | |
b32f4c7e | 774 | case Opt_fd_buffered_io: |
ce31c1b0 JE |
775 | ret = match_int(args, &arg); |
776 | if (ret) | |
777 | goto out; | |
b32f4c7e NB |
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; | |
769031c9 AV |
789 | case Opt_fd_async_io: |
790 | ret = match_int(args, &arg); | |
791 | if (ret) | |
792 | goto out; | |
793 | if (arg != 1) { | |
794 | pr_err("bogus fd_async_io=%d value\n", arg); | |
795 | ret = -EINVAL; | |
796 | goto out; | |
797 | } | |
798 | ||
799 | pr_debug("FILEIO: Using async I/O" | |
800 | " operations for struct fd_dev\n"); | |
801 | ||
802 | fd_dev->fbd_flags |= FDBD_HAS_ASYNC_IO; | |
803 | break; | |
c66ac9db NB |
804 | default: |
805 | break; | |
806 | } | |
807 | } | |
808 | ||
809 | out: | |
810 | kfree(orig); | |
811 | return (!ret) ? count : ret; | |
812 | } | |
813 | ||
0fd97ccf | 814 | static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 815 | { |
0fd97ccf | 816 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
817 | ssize_t bl = 0; |
818 | ||
819 | bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); | |
769031c9 | 820 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s Async: %d\n", |
b32f4c7e NB |
821 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, |
822 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? | |
769031c9 AV |
823 | "Buffered-WCE" : "O_DSYNC", |
824 | !!(fd_dev->fbd_flags & FDBD_HAS_ASYNC_IO)); | |
c66ac9db NB |
825 | return bl; |
826 | } | |
827 | ||
c66ac9db NB |
828 | static sector_t fd_get_blocks(struct se_device *dev) |
829 | { | |
0fd97ccf | 830 | struct fd_dev *fd_dev = FD_DEV(dev); |
cd9323fd NB |
831 | struct file *f = fd_dev->fd_file; |
832 | struct inode *i = f->f_mapping->host; | |
833 | unsigned long long dev_size; | |
834 | /* | |
835 | * When using a file that references an underlying struct block_device, | |
836 | * ensure dev_size is always based on the current inode size in order | |
837 | * to handle underlying block_device resize operations. | |
838 | */ | |
839 | if (S_ISBLK(i->i_mode)) | |
21363ca8 | 840 | dev_size = i_size_read(i); |
cd9323fd NB |
841 | else |
842 | dev_size = fd_dev->fd_dev_size; | |
c66ac9db | 843 | |
21363ca8 NB |
844 | return div_u64(dev_size - dev->dev_attrib.block_size, |
845 | dev->dev_attrib.block_size); | |
c66ac9db NB |
846 | } |
847 | ||
0f5e2ec4 NB |
848 | static int fd_init_prot(struct se_device *dev) |
849 | { | |
850 | struct fd_dev *fd_dev = FD_DEV(dev); | |
851 | struct file *prot_file, *file = fd_dev->fd_file; | |
852 | struct inode *inode; | |
853 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; | |
854 | char buf[FD_MAX_DEV_PROT_NAME]; | |
855 | ||
856 | if (!file) { | |
857 | pr_err("Unable to locate fd_dev->fd_file\n"); | |
858 | return -ENODEV; | |
859 | } | |
860 | ||
861 | inode = file->f_mapping->host; | |
862 | if (S_ISBLK(inode->i_mode)) { | |
863 | pr_err("FILEIO Protection emulation only supported on" | |
864 | " !S_ISBLK\n"); | |
865 | return -ENOSYS; | |
866 | } | |
867 | ||
868 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) | |
869 | flags &= ~O_DSYNC; | |
870 | ||
871 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", | |
872 | fd_dev->fd_dev_name); | |
873 | ||
874 | prot_file = filp_open(buf, flags, 0600); | |
875 | if (IS_ERR(prot_file)) { | |
876 | pr_err("filp_open(%s) failed\n", buf); | |
877 | ret = PTR_ERR(prot_file); | |
878 | return ret; | |
879 | } | |
880 | fd_dev->fd_prot_file = prot_file; | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
0f5e2ec4 NB |
885 | static int fd_format_prot(struct se_device *dev) |
886 | { | |
0f5e2ec4 | 887 | unsigned char *buf; |
0f5e2ec4 | 888 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
64d240b7 | 889 | int ret; |
0f5e2ec4 NB |
890 | |
891 | if (!dev->dev_attrib.pi_prot_type) { | |
892 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); | |
893 | return -ENODEV; | |
894 | } | |
0f5e2ec4 | 895 | |
0f5e2ec4 NB |
896 | buf = vzalloc(unit_size); |
897 | if (!buf) { | |
898 | pr_err("Unable to allocate FILEIO prot buf\n"); | |
899 | return -ENOMEM; | |
900 | } | |
0f5e2ec4 NB |
901 | |
902 | pr_debug("Using FILEIO prot_length: %llu\n", | |
64d240b7 AM |
903 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
904 | dev->prot_length); | |
0f5e2ec4 | 905 | |
80dcd0c1 | 906 | memset(buf, 0xff, unit_size); |
64d240b7 AM |
907 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
908 | buf, unit_size); | |
0f5e2ec4 NB |
909 | vfree(buf); |
910 | return ret; | |
911 | } | |
912 | ||
913 | static void fd_free_prot(struct se_device *dev) | |
914 | { | |
915 | struct fd_dev *fd_dev = FD_DEV(dev); | |
916 | ||
917 | if (!fd_dev->fd_prot_file) | |
918 | return; | |
919 | ||
920 | filp_close(fd_dev->fd_prot_file, NULL); | |
921 | fd_dev->fd_prot_file = NULL; | |
922 | } | |
923 | ||
9e999a6c | 924 | static struct sbc_ops fd_sbc_ops = { |
0c2ad7d1 | 925 | .execute_rw = fd_execute_rw, |
ad67f0d9 | 926 | .execute_sync_cache = fd_execute_sync_cache, |
7b745c84 | 927 | .execute_write_same = fd_execute_write_same, |
50642762 | 928 | .execute_unmap = fd_execute_unmap, |
0c2ad7d1 CH |
929 | }; |
930 | ||
de103c93 CH |
931 | static sense_reason_t |
932 | fd_parse_cdb(struct se_cmd *cmd) | |
0c2ad7d1 | 933 | { |
9e999a6c | 934 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
0c2ad7d1 CH |
935 | } |
936 | ||
0a06d430 | 937 | static const struct target_backend_ops fileio_ops = { |
c66ac9db | 938 | .name = "fileio", |
0fd97ccf CH |
939 | .inquiry_prod = "FILEIO", |
940 | .inquiry_rev = FD_VERSION, | |
c66ac9db | 941 | .owner = THIS_MODULE, |
c66ac9db NB |
942 | .attach_hba = fd_attach_hba, |
943 | .detach_hba = fd_detach_hba, | |
0fd97ccf CH |
944 | .alloc_device = fd_alloc_device, |
945 | .configure_device = fd_configure_device, | |
92634706 | 946 | .destroy_device = fd_destroy_device, |
c66ac9db | 947 | .free_device = fd_free_device, |
0c2ad7d1 | 948 | .parse_cdb = fd_parse_cdb, |
c66ac9db NB |
949 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
950 | .show_configfs_dev_params = fd_show_configfs_dev_params, | |
6f23ac8a | 951 | .get_device_type = sbc_get_device_type, |
c66ac9db | 952 | .get_blocks = fd_get_blocks, |
0f5e2ec4 NB |
953 | .init_prot = fd_init_prot, |
954 | .format_prot = fd_format_prot, | |
955 | .free_prot = fd_free_prot, | |
5873c4d1 | 956 | .tb_dev_attrib_attrs = sbc_attrib_attrs, |
c66ac9db NB |
957 | }; |
958 | ||
959 | static int __init fileio_module_init(void) | |
960 | { | |
0a06d430 | 961 | return transport_backend_register(&fileio_ops); |
c66ac9db NB |
962 | } |
963 | ||
63b91d5a | 964 | static void __exit fileio_module_exit(void) |
c66ac9db | 965 | { |
0a06d430 | 966 | target_backend_unregister(&fileio_ops); |
c66ac9db NB |
967 | } |
968 | ||
969 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); | |
970 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
971 | MODULE_LICENSE("GPL"); | |
972 | ||
973 | module_init(fileio_module_init); | |
974 | module_exit(fileio_module_exit); |