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> |
70d3ae5c | 33 | #include <linux/falloc.h> |
c66ac9db NB |
34 | #include <scsi/scsi.h> |
35 | #include <scsi/scsi_host.h> | |
50642762 | 36 | #include <asm/unaligned.h> |
c66ac9db NB |
37 | |
38 | #include <target/target_core_base.h> | |
c4795fb2 | 39 | #include <target/target_core_backend.h> |
b2320497 | 40 | #include <target/target_core_backend_configfs.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 NB |
48 | |
49 | /* fd_attach_hba(): (Part of se_subsystem_api_t template) | |
50 | * | |
51 | * | |
52 | */ | |
53 | static int fd_attach_hba(struct se_hba *hba, u32 host_id) | |
54 | { | |
55 | struct fd_host *fd_host; | |
56 | ||
57 | fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL); | |
6708bb27 AG |
58 | if (!fd_host) { |
59 | pr_err("Unable to allocate memory for struct fd_host\n"); | |
e3d6f909 | 60 | return -ENOMEM; |
c66ac9db NB |
61 | } |
62 | ||
63 | fd_host->fd_host_id = host_id; | |
64 | ||
e3d6f909 | 65 | hba->hba_ptr = fd_host; |
c66ac9db | 66 | |
6708bb27 | 67 | pr_debug("CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic" |
c66ac9db NB |
68 | " Target Core Stack %s\n", hba->hba_id, FD_VERSION, |
69 | TARGET_CORE_MOD_VERSION); | |
95cadace NB |
70 | pr_debug("CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic\n", |
71 | hba->hba_id, fd_host->fd_host_id); | |
c66ac9db NB |
72 | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static void fd_detach_hba(struct se_hba *hba) | |
77 | { | |
78 | struct fd_host *fd_host = hba->hba_ptr; | |
79 | ||
6708bb27 | 80 | pr_debug("CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic" |
c66ac9db NB |
81 | " Target Core\n", hba->hba_id, fd_host->fd_host_id); |
82 | ||
83 | kfree(fd_host); | |
84 | hba->hba_ptr = NULL; | |
85 | } | |
86 | ||
0fd97ccf | 87 | static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name) |
c66ac9db NB |
88 | { |
89 | struct fd_dev *fd_dev; | |
8359cf43 | 90 | struct fd_host *fd_host = hba->hba_ptr; |
c66ac9db NB |
91 | |
92 | fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL); | |
6708bb27 AG |
93 | if (!fd_dev) { |
94 | pr_err("Unable to allocate memory for struct fd_dev\n"); | |
c66ac9db NB |
95 | return NULL; |
96 | } | |
97 | ||
98 | fd_dev->fd_host = fd_host; | |
99 | ||
6708bb27 | 100 | pr_debug("FILEIO: Allocated fd_dev for %p\n", name); |
c66ac9db | 101 | |
0fd97ccf | 102 | return &fd_dev->dev; |
c66ac9db NB |
103 | } |
104 | ||
0fd97ccf | 105 | static int fd_configure_device(struct se_device *dev) |
c66ac9db | 106 | { |
0fd97ccf CH |
107 | struct fd_dev *fd_dev = FD_DEV(dev); |
108 | struct fd_host *fd_host = dev->se_hba->hba_ptr; | |
c66ac9db NB |
109 | struct file *file; |
110 | struct inode *inode = NULL; | |
0fd97ccf | 111 | int flags, ret = -EINVAL; |
c66ac9db | 112 | |
0fd97ccf CH |
113 | if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) { |
114 | pr_err("Missing fd_dev_name=\n"); | |
115 | return -EINVAL; | |
116 | } | |
c66ac9db | 117 | |
c66ac9db | 118 | /* |
a4dff304 NB |
119 | * Use O_DSYNC by default instead of O_SYNC to forgo syncing |
120 | * of pure timestamp updates. | |
c66ac9db | 121 | */ |
a4dff304 | 122 | flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; |
0fd97ccf | 123 | |
b32f4c7e NB |
124 | /* |
125 | * Optionally allow fd_buffered_io=1 to be enabled for people | |
126 | * who want use the fs buffer cache as an WriteCache mechanism. | |
127 | * | |
128 | * This means that in event of a hard failure, there is a risk | |
129 | * of silent data-loss if the SCSI client has *not* performed a | |
130 | * forced unit access (FUA) write, or issued SYNCHRONIZE_CACHE | |
131 | * to write-out the entire device cache. | |
132 | */ | |
133 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { | |
134 | pr_debug("FILEIO: Disabling O_DSYNC, using buffered FILEIO\n"); | |
135 | flags &= ~O_DSYNC; | |
136 | } | |
c66ac9db | 137 | |
dbc6e022 | 138 | file = filp_open(fd_dev->fd_dev_name, flags, 0600); |
613640e4 | 139 | if (IS_ERR(file)) { |
dbc6e022 | 140 | pr_err("filp_open(%s) failed\n", fd_dev->fd_dev_name); |
613640e4 NB |
141 | ret = PTR_ERR(file); |
142 | goto fail; | |
143 | } | |
c66ac9db NB |
144 | fd_dev->fd_file = file; |
145 | /* | |
146 | * If using a block backend with this struct file, we extract | |
147 | * fd_dev->fd_[block,dev]_size from struct block_device. | |
148 | * | |
149 | * Otherwise, we use the passed fd_size= from configfs | |
150 | */ | |
151 | inode = file->f_mapping->host; | |
152 | if (S_ISBLK(inode->i_mode)) { | |
0fd97ccf | 153 | struct request_queue *q = bdev_get_queue(inode->i_bdev); |
cd9323fd | 154 | unsigned long long dev_size; |
0fd97ccf | 155 | |
21363ca8 | 156 | fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev); |
c66ac9db NB |
157 | /* |
158 | * Determine the number of bytes from i_size_read() minus | |
159 | * one (1) logical sector from underlying struct block_device | |
160 | */ | |
cd9323fd | 161 | dev_size = (i_size_read(file->f_mapping->host) - |
c66ac9db NB |
162 | fd_dev->fd_block_size); |
163 | ||
6708bb27 | 164 | pr_debug("FILEIO: Using size: %llu bytes from struct" |
c66ac9db | 165 | " block_device blocks: %llu logical_block_size: %d\n", |
cd9323fd | 166 | dev_size, div_u64(dev_size, fd_dev->fd_block_size), |
c66ac9db | 167 | fd_dev->fd_block_size); |
70d3ae5c AH |
168 | /* |
169 | * Check if the underlying struct block_device request_queue supports | |
170 | * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM | |
171 | * in ATA and we need to set TPE=1 | |
172 | */ | |
173 | if (blk_queue_discard(q)) { | |
174 | dev->dev_attrib.max_unmap_lba_count = | |
175 | q->limits.max_discard_sectors; | |
176 | /* | |
177 | * Currently hardcoded to 1 in Linux/SCSI code.. | |
178 | */ | |
179 | dev->dev_attrib.max_unmap_block_desc_count = 1; | |
180 | dev->dev_attrib.unmap_granularity = | |
181 | q->limits.discard_granularity >> 9; | |
182 | dev->dev_attrib.unmap_granularity_alignment = | |
183 | q->limits.discard_alignment; | |
184 | pr_debug("IFILE: BLOCK Discard support available," | |
185 | " disabled by default\n"); | |
186 | } | |
187 | /* | |
188 | * Enable write same emulation for IBLOCK and use 0xFFFF as | |
189 | * the smaller WRITE_SAME(10) only has a two-byte block count. | |
190 | */ | |
191 | dev->dev_attrib.max_write_same_len = 0xFFFF; | |
0463a3fe AH |
192 | |
193 | if (blk_queue_nonrot(q)) | |
194 | dev->dev_attrib.is_nonrot = 1; | |
c66ac9db NB |
195 | } else { |
196 | if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) { | |
6708bb27 | 197 | pr_err("FILEIO: Missing fd_dev_size=" |
c66ac9db NB |
198 | " parameter, and no backing struct" |
199 | " block_device\n"); | |
200 | goto fail; | |
201 | } | |
202 | ||
21363ca8 | 203 | fd_dev->fd_block_size = FD_BLOCKSIZE; |
70d3ae5c AH |
204 | /* |
205 | * Limit UNMAP emulation to 8k Number of LBAs (NoLB) | |
206 | */ | |
207 | dev->dev_attrib.max_unmap_lba_count = 0x2000; | |
208 | /* | |
209 | * Currently hardcoded to 1 in Linux/SCSI code.. | |
210 | */ | |
211 | dev->dev_attrib.max_unmap_block_desc_count = 1; | |
212 | dev->dev_attrib.unmap_granularity = 1; | |
213 | dev->dev_attrib.unmap_granularity_alignment = 0; | |
214 | ||
215 | /* | |
216 | * Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB) | |
217 | * based upon struct iovec limit for vfs_writev() | |
218 | */ | |
219 | dev->dev_attrib.max_write_same_len = 0x1000; | |
c66ac9db NB |
220 | } |
221 | ||
21363ca8 | 222 | dev->dev_attrib.hw_block_size = fd_dev->fd_block_size; |
95cadace NB |
223 | dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES; |
224 | dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size; | |
0fd97ccf | 225 | dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH; |
c66ac9db | 226 | |
b32f4c7e NB |
227 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) { |
228 | pr_debug("FILEIO: Forcing setting of emulate_write_cache=1" | |
229 | " with FDBD_HAS_BUFFERED_IO_WCE\n"); | |
0fd97ccf | 230 | dev->dev_attrib.emulate_write_cache = 1; |
b32f4c7e NB |
231 | } |
232 | ||
c66ac9db NB |
233 | fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++; |
234 | fd_dev->fd_queue_depth = dev->queue_depth; | |
235 | ||
6708bb27 | 236 | pr_debug("CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s," |
c66ac9db NB |
237 | " %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id, |
238 | fd_dev->fd_dev_name, fd_dev->fd_dev_size); | |
239 | ||
0fd97ccf | 240 | return 0; |
c66ac9db NB |
241 | fail: |
242 | if (fd_dev->fd_file) { | |
243 | filp_close(fd_dev->fd_file, NULL); | |
244 | fd_dev->fd_file = NULL; | |
245 | } | |
0fd97ccf | 246 | return ret; |
c66ac9db NB |
247 | } |
248 | ||
0fd97ccf | 249 | static void fd_free_device(struct se_device *dev) |
c66ac9db | 250 | { |
0fd97ccf | 251 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
252 | |
253 | if (fd_dev->fd_file) { | |
254 | filp_close(fd_dev->fd_file, NULL); | |
255 | fd_dev->fd_file = NULL; | |
256 | } | |
257 | ||
258 | kfree(fd_dev); | |
259 | } | |
260 | ||
42201b55 NB |
261 | static int fd_do_prot_rw(struct se_cmd *cmd, struct fd_prot *fd_prot, |
262 | int is_write) | |
263 | { | |
264 | struct se_device *se_dev = cmd->se_dev; | |
265 | struct fd_dev *dev = FD_DEV(se_dev); | |
266 | struct file *prot_fd = dev->fd_prot_file; | |
267 | struct scatterlist *sg; | |
268 | loff_t pos = (cmd->t_task_lba * se_dev->prot_length); | |
269 | unsigned char *buf; | |
270 | u32 prot_size, len, size; | |
271 | int rc, ret = 1, i; | |
272 | ||
273 | prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * | |
274 | se_dev->prot_length; | |
275 | ||
276 | if (!is_write) { | |
277 | fd_prot->prot_buf = vzalloc(prot_size); | |
278 | if (!fd_prot->prot_buf) { | |
279 | pr_err("Unable to allocate fd_prot->prot_buf\n"); | |
280 | return -ENOMEM; | |
281 | } | |
282 | buf = fd_prot->prot_buf; | |
283 | ||
284 | fd_prot->prot_sg_nents = cmd->t_prot_nents; | |
285 | fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist) * | |
286 | fd_prot->prot_sg_nents, GFP_KERNEL); | |
287 | if (!fd_prot->prot_sg) { | |
288 | pr_err("Unable to allocate fd_prot->prot_sg\n"); | |
289 | vfree(fd_prot->prot_buf); | |
290 | return -ENOMEM; | |
291 | } | |
292 | size = prot_size; | |
293 | ||
294 | for_each_sg(fd_prot->prot_sg, sg, fd_prot->prot_sg_nents, i) { | |
295 | ||
296 | len = min_t(u32, PAGE_SIZE, size); | |
297 | sg_set_buf(sg, buf, len); | |
298 | size -= len; | |
299 | buf += len; | |
300 | } | |
301 | } | |
302 | ||
303 | if (is_write) { | |
304 | rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); | |
305 | if (rc < 0 || prot_size != rc) { | |
306 | pr_err("kernel_write() for fd_do_prot_rw failed:" | |
307 | " %d\n", rc); | |
308 | ret = -EINVAL; | |
309 | } | |
310 | } else { | |
311 | rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); | |
312 | if (rc < 0) { | |
313 | pr_err("kernel_read() for fd_do_prot_rw failed:" | |
314 | " %d\n", rc); | |
315 | ret = -EINVAL; | |
316 | } | |
317 | } | |
318 | ||
319 | if (is_write || ret < 0) { | |
320 | kfree(fd_prot->prot_sg); | |
321 | vfree(fd_prot->prot_buf); | |
322 | } | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
778229af SAS |
327 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
328 | u32 sgl_nents, int is_write) | |
c66ac9db | 329 | { |
5787cacd | 330 | struct se_device *se_dev = cmd->se_dev; |
0fd97ccf | 331 | struct fd_dev *dev = FD_DEV(se_dev); |
6708bb27 | 332 | struct file *fd = dev->fd_file; |
5787cacd | 333 | struct scatterlist *sg; |
c66ac9db NB |
334 | struct iovec *iov; |
335 | mm_segment_t old_fs; | |
0fd97ccf | 336 | loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size); |
c66ac9db NB |
337 | int ret = 0, i; |
338 | ||
5787cacd | 339 | iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL); |
6708bb27 AG |
340 | if (!iov) { |
341 | pr_err("Unable to allocate fd_do_readv iov[]\n"); | |
e3d6f909 | 342 | return -ENOMEM; |
c66ac9db NB |
343 | } |
344 | ||
5787cacd | 345 | for_each_sg(sgl, sg, sgl_nents, i) { |
9649fa1b | 346 | iov[i].iov_len = sg->length; |
40ff2c3b | 347 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset; |
c66ac9db NB |
348 | } |
349 | ||
350 | old_fs = get_fs(); | |
351 | set_fs(get_ds()); | |
778229af SAS |
352 | |
353 | if (is_write) | |
354 | ret = vfs_writev(fd, &iov[0], sgl_nents, &pos); | |
355 | else | |
356 | ret = vfs_readv(fd, &iov[0], sgl_nents, &pos); | |
357 | ||
c66ac9db NB |
358 | set_fs(old_fs); |
359 | ||
40ff2c3b SAS |
360 | for_each_sg(sgl, sg, sgl_nents, i) |
361 | kunmap(sg_page(sg)); | |
778229af | 362 | |
c66ac9db | 363 | kfree(iov); |
778229af SAS |
364 | |
365 | if (is_write) { | |
5787cacd | 366 | if (ret < 0 || ret != cmd->data_length) { |
778229af | 367 | pr_err("%s() write returned %d\n", __func__, ret); |
e3d6f909 | 368 | return (ret < 0 ? ret : -EINVAL); |
c66ac9db NB |
369 | } |
370 | } else { | |
778229af SAS |
371 | /* |
372 | * Return zeros and GOOD status even if the READ did not return | |
373 | * the expected virt_size for struct file w/o a backing struct | |
374 | * block_device. | |
375 | */ | |
496ad9aa | 376 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
778229af SAS |
377 | if (ret < 0 || ret != cmd->data_length) { |
378 | pr_err("%s() returned %d, expecting %u for " | |
379 | "S_ISBLK\n", __func__, ret, | |
380 | cmd->data_length); | |
381 | return (ret < 0 ? ret : -EINVAL); | |
382 | } | |
383 | } else { | |
384 | if (ret < 0) { | |
385 | pr_err("%s() returned %d for non S_ISBLK\n", | |
386 | __func__, ret); | |
387 | return ret; | |
388 | } | |
c66ac9db NB |
389 | } |
390 | } | |
c66ac9db NB |
391 | return 1; |
392 | } | |
393 | ||
de103c93 CH |
394 | static sense_reason_t |
395 | fd_execute_sync_cache(struct se_cmd *cmd) | |
c66ac9db | 396 | { |
c66ac9db | 397 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 398 | struct fd_dev *fd_dev = FD_DEV(dev); |
a1d8b49a | 399 | int immed = (cmd->t_task_cdb[1] & 0x2); |
c66ac9db NB |
400 | loff_t start, end; |
401 | int ret; | |
402 | ||
403 | /* | |
404 | * If the Immediate bit is set, queue up the GOOD response | |
405 | * for this SYNCHRONIZE_CACHE op | |
406 | */ | |
407 | if (immed) | |
5787cacd | 408 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
c66ac9db NB |
409 | |
410 | /* | |
411 | * Determine if we will be flushing the entire device. | |
412 | */ | |
a1d8b49a | 413 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
c66ac9db NB |
414 | start = 0; |
415 | end = LLONG_MAX; | |
416 | } else { | |
0fd97ccf | 417 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
c66ac9db | 418 | if (cmd->data_length) |
62d3ab49 | 419 | end = start + cmd->data_length - 1; |
c66ac9db NB |
420 | else |
421 | end = LLONG_MAX; | |
422 | } | |
423 | ||
424 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); | |
425 | if (ret != 0) | |
6708bb27 | 426 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
c66ac9db | 427 | |
5787cacd | 428 | if (immed) |
ad67f0d9 | 429 | return 0; |
5787cacd | 430 | |
de103c93 | 431 | if (ret) |
5787cacd | 432 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
de103c93 | 433 | else |
5787cacd | 434 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
ad67f0d9 CH |
435 | |
436 | return 0; | |
c66ac9db NB |
437 | } |
438 | ||
7b745c84 NB |
439 | static unsigned char * |
440 | fd_setup_write_same_buf(struct se_cmd *cmd, struct scatterlist *sg, | |
441 | unsigned int len) | |
442 | { | |
443 | struct se_device *se_dev = cmd->se_dev; | |
444 | unsigned int block_size = se_dev->dev_attrib.block_size; | |
445 | unsigned int i = 0, end; | |
446 | unsigned char *buf, *p, *kmap_buf; | |
447 | ||
448 | buf = kzalloc(min_t(unsigned int, len, PAGE_SIZE), GFP_KERNEL); | |
449 | if (!buf) { | |
450 | pr_err("Unable to allocate fd_execute_write_same buf\n"); | |
451 | return NULL; | |
452 | } | |
453 | ||
454 | kmap_buf = kmap(sg_page(sg)) + sg->offset; | |
455 | if (!kmap_buf) { | |
456 | pr_err("kmap() failed in fd_setup_write_same\n"); | |
457 | kfree(buf); | |
458 | return NULL; | |
459 | } | |
460 | /* | |
461 | * Fill local *buf to contain multiple WRITE_SAME blocks up to | |
462 | * min(len, PAGE_SIZE) | |
463 | */ | |
464 | p = buf; | |
465 | end = min_t(unsigned int, len, PAGE_SIZE); | |
466 | ||
467 | while (i < end) { | |
468 | memcpy(p, kmap_buf, block_size); | |
469 | ||
470 | i += block_size; | |
471 | p += block_size; | |
472 | } | |
473 | kunmap(sg_page(sg)); | |
474 | ||
475 | return buf; | |
476 | } | |
477 | ||
478 | static sense_reason_t | |
479 | fd_execute_write_same(struct se_cmd *cmd) | |
480 | { | |
481 | struct se_device *se_dev = cmd->se_dev; | |
482 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
483 | struct file *f = fd_dev->fd_file; | |
484 | struct scatterlist *sg; | |
485 | struct iovec *iov; | |
486 | mm_segment_t old_fs; | |
972b29c8 | 487 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
7b745c84 NB |
488 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
489 | unsigned int len, len_tmp, iov_num; | |
490 | int i, rc; | |
491 | unsigned char *buf; | |
492 | ||
493 | if (!nolb) { | |
494 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
495 | return 0; | |
496 | } | |
afd73f1b NB |
497 | if (cmd->prot_op) { |
498 | pr_err("WRITE_SAME: Protection information with FILEIO" | |
499 | " backends not supported\n"); | |
500 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
501 | } | |
7b745c84 NB |
502 | sg = &cmd->t_data_sg[0]; |
503 | ||
504 | if (cmd->t_data_nents > 1 || | |
505 | sg->length != cmd->se_dev->dev_attrib.block_size) { | |
506 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" | |
507 | " block_size: %u\n", cmd->t_data_nents, sg->length, | |
508 | cmd->se_dev->dev_attrib.block_size); | |
509 | return TCM_INVALID_CDB_FIELD; | |
510 | } | |
511 | ||
512 | len = len_tmp = nolb * se_dev->dev_attrib.block_size; | |
513 | iov_num = DIV_ROUND_UP(len, PAGE_SIZE); | |
514 | ||
515 | buf = fd_setup_write_same_buf(cmd, sg, len); | |
516 | if (!buf) | |
517 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
518 | ||
519 | iov = vzalloc(sizeof(struct iovec) * iov_num); | |
520 | if (!iov) { | |
521 | pr_err("Unable to allocate fd_execute_write_same iovecs\n"); | |
522 | kfree(buf); | |
523 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
524 | } | |
525 | /* | |
526 | * Map the single fabric received scatterlist block now populated | |
527 | * in *buf into each iovec for I/O submission. | |
528 | */ | |
529 | for (i = 0; i < iov_num; i++) { | |
530 | iov[i].iov_base = buf; | |
531 | iov[i].iov_len = min_t(unsigned int, len_tmp, PAGE_SIZE); | |
532 | len_tmp -= iov[i].iov_len; | |
533 | } | |
534 | ||
535 | old_fs = get_fs(); | |
536 | set_fs(get_ds()); | |
537 | rc = vfs_writev(f, &iov[0], iov_num, &pos); | |
538 | set_fs(old_fs); | |
539 | ||
540 | vfree(iov); | |
541 | kfree(buf); | |
542 | ||
543 | if (rc < 0 || rc != len) { | |
544 | pr_err("vfs_writev() returned %d for write same\n", rc); | |
545 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
546 | } | |
547 | ||
548 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
549 | return 0; | |
550 | } | |
551 | ||
70d3ae5c | 552 | static sense_reason_t |
86d71829 | 553 | fd_do_unmap(struct se_cmd *cmd, void *priv, sector_t lba, sector_t nolb) |
70d3ae5c | 554 | { |
86d71829 | 555 | struct file *file = priv; |
70d3ae5c | 556 | struct inode *inode = file->f_mapping->host; |
70d3ae5c AH |
557 | int ret; |
558 | ||
70d3ae5c AH |
559 | if (S_ISBLK(inode->i_mode)) { |
560 | /* The backend is block device, use discard */ | |
561 | struct block_device *bdev = inode->i_bdev; | |
562 | ||
43f55bbb | 563 | ret = blkdev_issue_discard(bdev, lba, |
70d3ae5c AH |
564 | nolb, GFP_KERNEL, 0); |
565 | if (ret < 0) { | |
566 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", | |
567 | ret); | |
568 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
569 | } | |
570 | } else { | |
571 | /* The backend is normal file, use fallocate */ | |
43f55bbb AH |
572 | struct se_device *se_dev = cmd->se_dev; |
573 | loff_t pos = lba * se_dev->dev_attrib.block_size; | |
70d3ae5c AH |
574 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
575 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; | |
576 | ||
577 | if (!file->f_op->fallocate) | |
578 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
579 | ||
580 | ret = file->f_op->fallocate(file, mode, pos, len); | |
581 | if (ret < 0) { | |
582 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); | |
583 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
584 | } | |
585 | } | |
586 | ||
43f55bbb AH |
587 | return 0; |
588 | } | |
589 | ||
590 | static sense_reason_t | |
591 | fd_execute_write_same_unmap(struct se_cmd *cmd) | |
592 | { | |
593 | struct se_device *se_dev = cmd->se_dev; | |
594 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
595 | struct file *file = fd_dev->fd_file; | |
596 | sector_t lba = cmd->t_task_lba; | |
597 | sector_t nolb = sbc_get_write_same_sectors(cmd); | |
598 | int ret; | |
599 | ||
600 | if (!nolb) { | |
601 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | ret = fd_do_unmap(cmd, file, lba, nolb); | |
606 | if (ret) | |
607 | return ret; | |
608 | ||
70d3ae5c AH |
609 | target_complete_cmd(cmd, GOOD); |
610 | return 0; | |
611 | } | |
612 | ||
50642762 AH |
613 | static sense_reason_t |
614 | fd_execute_unmap(struct se_cmd *cmd) | |
615 | { | |
86d71829 | 616 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
50642762 | 617 | |
86d71829 | 618 | return sbc_execute_unmap(cmd, fd_do_unmap, file); |
50642762 AH |
619 | } |
620 | ||
de103c93 | 621 | static sense_reason_t |
a82a9538 NB |
622 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
623 | enum dma_data_direction data_direction) | |
c66ac9db | 624 | { |
c66ac9db | 625 | struct se_device *dev = cmd->se_dev; |
42201b55 NB |
626 | struct fd_prot fd_prot; |
627 | sense_reason_t rc; | |
c66ac9db | 628 | int ret = 0; |
046ba642 NB |
629 | /* |
630 | * We are currently limited by the number of iovecs (2048) per | |
631 | * single vfs_[writev,readv] call. | |
632 | */ | |
633 | if (cmd->data_length > FD_MAX_BYTES) { | |
634 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" | |
635 | "FD_MAX_BYTES: %u iovec count limitiation\n", | |
636 | cmd->data_length, FD_MAX_BYTES); | |
637 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
638 | } | |
c66ac9db NB |
639 | /* |
640 | * Call vectorized fileio functions to map struct scatterlist | |
641 | * physical memory addresses to struct iovec virtual memory. | |
642 | */ | |
5787cacd | 643 | if (data_direction == DMA_FROM_DEVICE) { |
42201b55 NB |
644 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
645 | ||
646 | if (cmd->prot_type) { | |
647 | ret = fd_do_prot_rw(cmd, &fd_prot, false); | |
648 | if (ret < 0) | |
649 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
650 | } | |
651 | ||
778229af | 652 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
42201b55 NB |
653 | |
654 | if (ret > 0 && cmd->prot_type) { | |
655 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; | |
656 | ||
657 | rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, | |
658 | 0, fd_prot.prot_sg, 0); | |
659 | if (rc) { | |
660 | kfree(fd_prot.prot_sg); | |
661 | vfree(fd_prot.prot_buf); | |
662 | return rc; | |
663 | } | |
664 | kfree(fd_prot.prot_sg); | |
665 | vfree(fd_prot.prot_buf); | |
666 | } | |
c66ac9db | 667 | } else { |
42201b55 NB |
668 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
669 | ||
670 | if (cmd->prot_type) { | |
671 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; | |
672 | ||
673 | ret = fd_do_prot_rw(cmd, &fd_prot, false); | |
674 | if (ret < 0) | |
675 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
676 | ||
677 | rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, | |
678 | 0, fd_prot.prot_sg, 0); | |
679 | if (rc) { | |
680 | kfree(fd_prot.prot_sg); | |
681 | vfree(fd_prot.prot_buf); | |
682 | return rc; | |
683 | } | |
684 | } | |
685 | ||
778229af | 686 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
a4dff304 | 687 | /* |
125d0119 | 688 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
a4dff304 NB |
689 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
690 | * Allow this to happen independent of WCE=0 setting. | |
691 | */ | |
c66ac9db | 692 | if (ret > 0 && |
0fd97ccf | 693 | dev->dev_attrib.emulate_fua_write > 0 && |
2d3a4b51 | 694 | (cmd->se_cmd_flags & SCF_FUA)) { |
0fd97ccf | 695 | struct fd_dev *fd_dev = FD_DEV(dev); |
a4dff304 | 696 | loff_t start = cmd->t_task_lba * |
0fd97ccf | 697 | dev->dev_attrib.block_size; |
62d3ab49 ZB |
698 | loff_t end; |
699 | ||
700 | if (cmd->data_length) | |
701 | end = start + cmd->data_length - 1; | |
702 | else | |
703 | end = LLONG_MAX; | |
c66ac9db | 704 | |
a4dff304 NB |
705 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
706 | } | |
42201b55 NB |
707 | |
708 | if (ret > 0 && cmd->prot_type) { | |
709 | ret = fd_do_prot_rw(cmd, &fd_prot, true); | |
710 | if (ret < 0) | |
711 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
712 | } | |
c66ac9db NB |
713 | } |
714 | ||
42201b55 NB |
715 | if (ret < 0) { |
716 | kfree(fd_prot.prot_sg); | |
717 | vfree(fd_prot.prot_buf); | |
de103c93 | 718 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
42201b55 | 719 | } |
de103c93 | 720 | |
5787cacd CH |
721 | if (ret) |
722 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
03e98c9e | 723 | return 0; |
c66ac9db NB |
724 | } |
725 | ||
c66ac9db NB |
726 | enum { |
727 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err | |
728 | }; | |
729 | ||
730 | static match_table_t tokens = { | |
731 | {Opt_fd_dev_name, "fd_dev_name=%s"}, | |
732 | {Opt_fd_dev_size, "fd_dev_size=%s"}, | |
b32f4c7e | 733 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
c66ac9db NB |
734 | {Opt_err, NULL} |
735 | }; | |
736 | ||
0fd97ccf CH |
737 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
738 | const char *page, ssize_t count) | |
c66ac9db | 739 | { |
0fd97ccf | 740 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
741 | char *orig, *ptr, *arg_p, *opts; |
742 | substring_t args[MAX_OPT_ARGS]; | |
b32f4c7e | 743 | int ret = 0, arg, token; |
c66ac9db NB |
744 | |
745 | opts = kstrdup(page, GFP_KERNEL); | |
746 | if (!opts) | |
747 | return -ENOMEM; | |
748 | ||
749 | orig = opts; | |
750 | ||
90c161b6 | 751 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
752 | if (!*ptr) |
753 | continue; | |
754 | ||
755 | token = match_token(ptr, tokens, args); | |
756 | switch (token) { | |
757 | case Opt_fd_dev_name: | |
dbc6e022 AV |
758 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
759 | FD_MAX_DEV_NAME) == 0) { | |
760 | ret = -EINVAL; | |
6d180253 JJ |
761 | break; |
762 | } | |
6708bb27 | 763 | pr_debug("FILEIO: Referencing Path: %s\n", |
c66ac9db NB |
764 | fd_dev->fd_dev_name); |
765 | fd_dev->fbd_flags |= FBDF_HAS_PATH; | |
766 | break; | |
767 | case Opt_fd_dev_size: | |
768 | arg_p = match_strdup(&args[0]); | |
6d180253 JJ |
769 | if (!arg_p) { |
770 | ret = -ENOMEM; | |
771 | break; | |
772 | } | |
57103d7f | 773 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
6d180253 | 774 | kfree(arg_p); |
c66ac9db | 775 | if (ret < 0) { |
57103d7f | 776 | pr_err("kstrtoull() failed for" |
c66ac9db NB |
777 | " fd_dev_size=\n"); |
778 | goto out; | |
779 | } | |
6708bb27 | 780 | pr_debug("FILEIO: Referencing Size: %llu" |
c66ac9db NB |
781 | " bytes\n", fd_dev->fd_dev_size); |
782 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; | |
783 | break; | |
b32f4c7e | 784 | case Opt_fd_buffered_io: |
ce31c1b0 JE |
785 | ret = match_int(args, &arg); |
786 | if (ret) | |
787 | goto out; | |
b32f4c7e NB |
788 | if (arg != 1) { |
789 | pr_err("bogus fd_buffered_io=%d value\n", arg); | |
790 | ret = -EINVAL; | |
791 | goto out; | |
792 | } | |
793 | ||
794 | pr_debug("FILEIO: Using buffered I/O" | |
795 | " operations for struct fd_dev\n"); | |
796 | ||
797 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; | |
798 | break; | |
c66ac9db NB |
799 | default: |
800 | break; | |
801 | } | |
802 | } | |
803 | ||
804 | out: | |
805 | kfree(orig); | |
806 | return (!ret) ? count : ret; | |
807 | } | |
808 | ||
0fd97ccf | 809 | static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 810 | { |
0fd97ccf | 811 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
812 | ssize_t bl = 0; |
813 | ||
814 | bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); | |
b32f4c7e NB |
815 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
816 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, | |
817 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? | |
818 | "Buffered-WCE" : "O_DSYNC"); | |
c66ac9db NB |
819 | return bl; |
820 | } | |
821 | ||
c66ac9db NB |
822 | static sector_t fd_get_blocks(struct se_device *dev) |
823 | { | |
0fd97ccf | 824 | struct fd_dev *fd_dev = FD_DEV(dev); |
cd9323fd NB |
825 | struct file *f = fd_dev->fd_file; |
826 | struct inode *i = f->f_mapping->host; | |
827 | unsigned long long dev_size; | |
828 | /* | |
829 | * When using a file that references an underlying struct block_device, | |
830 | * ensure dev_size is always based on the current inode size in order | |
831 | * to handle underlying block_device resize operations. | |
832 | */ | |
833 | if (S_ISBLK(i->i_mode)) | |
21363ca8 | 834 | dev_size = i_size_read(i); |
cd9323fd NB |
835 | else |
836 | dev_size = fd_dev->fd_dev_size; | |
c66ac9db | 837 | |
21363ca8 NB |
838 | return div_u64(dev_size - dev->dev_attrib.block_size, |
839 | dev->dev_attrib.block_size); | |
c66ac9db NB |
840 | } |
841 | ||
0f5e2ec4 NB |
842 | static int fd_init_prot(struct se_device *dev) |
843 | { | |
844 | struct fd_dev *fd_dev = FD_DEV(dev); | |
845 | struct file *prot_file, *file = fd_dev->fd_file; | |
846 | struct inode *inode; | |
847 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; | |
848 | char buf[FD_MAX_DEV_PROT_NAME]; | |
849 | ||
850 | if (!file) { | |
851 | pr_err("Unable to locate fd_dev->fd_file\n"); | |
852 | return -ENODEV; | |
853 | } | |
854 | ||
855 | inode = file->f_mapping->host; | |
856 | if (S_ISBLK(inode->i_mode)) { | |
857 | pr_err("FILEIO Protection emulation only supported on" | |
858 | " !S_ISBLK\n"); | |
859 | return -ENOSYS; | |
860 | } | |
861 | ||
862 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) | |
863 | flags &= ~O_DSYNC; | |
864 | ||
865 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", | |
866 | fd_dev->fd_dev_name); | |
867 | ||
868 | prot_file = filp_open(buf, flags, 0600); | |
869 | if (IS_ERR(prot_file)) { | |
870 | pr_err("filp_open(%s) failed\n", buf); | |
871 | ret = PTR_ERR(prot_file); | |
872 | return ret; | |
873 | } | |
874 | fd_dev->fd_prot_file = prot_file; | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
0f5e2ec4 NB |
879 | static int fd_format_prot(struct se_device *dev) |
880 | { | |
881 | struct fd_dev *fd_dev = FD_DEV(dev); | |
882 | struct file *prot_fd = fd_dev->fd_prot_file; | |
883 | sector_t prot_length, prot; | |
884 | unsigned char *buf; | |
885 | loff_t pos = 0; | |
0f5e2ec4 NB |
886 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
887 | int rc, ret = 0, size, len; | |
0f5e2ec4 NB |
888 | |
889 | if (!dev->dev_attrib.pi_prot_type) { | |
890 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); | |
891 | return -ENODEV; | |
892 | } | |
893 | if (!prot_fd) { | |
894 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); | |
895 | return -ENODEV; | |
896 | } | |
897 | ||
0f5e2ec4 NB |
898 | buf = vzalloc(unit_size); |
899 | if (!buf) { | |
900 | pr_err("Unable to allocate FILEIO prot buf\n"); | |
901 | return -ENOMEM; | |
902 | } | |
0f5e2ec4 NB |
903 | prot_length = (dev->transport->get_blocks(dev) + 1) * dev->prot_length; |
904 | size = prot_length; | |
905 | ||
906 | pr_debug("Using FILEIO prot_length: %llu\n", | |
907 | (unsigned long long)prot_length); | |
908 | ||
80dcd0c1 | 909 | memset(buf, 0xff, unit_size); |
0f5e2ec4 | 910 | for (prot = 0; prot < prot_length; prot += unit_size) { |
0f5e2ec4 | 911 | len = min(unit_size, size); |
0f5e2ec4 NB |
912 | rc = kernel_write(prot_fd, buf, len, pos); |
913 | if (rc != len) { | |
914 | pr_err("vfs_write to prot file failed: %d\n", rc); | |
915 | ret = -ENODEV; | |
916 | goto out; | |
917 | } | |
918 | pos += len; | |
919 | size -= len; | |
920 | } | |
921 | ||
922 | out: | |
923 | vfree(buf); | |
924 | return ret; | |
925 | } | |
926 | ||
927 | static void fd_free_prot(struct se_device *dev) | |
928 | { | |
929 | struct fd_dev *fd_dev = FD_DEV(dev); | |
930 | ||
931 | if (!fd_dev->fd_prot_file) | |
932 | return; | |
933 | ||
934 | filp_close(fd_dev->fd_prot_file, NULL); | |
935 | fd_dev->fd_prot_file = NULL; | |
936 | } | |
937 | ||
9e999a6c | 938 | static struct sbc_ops fd_sbc_ops = { |
0c2ad7d1 | 939 | .execute_rw = fd_execute_rw, |
ad67f0d9 | 940 | .execute_sync_cache = fd_execute_sync_cache, |
7b745c84 | 941 | .execute_write_same = fd_execute_write_same, |
70d3ae5c | 942 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
50642762 | 943 | .execute_unmap = fd_execute_unmap, |
0c2ad7d1 CH |
944 | }; |
945 | ||
de103c93 CH |
946 | static sense_reason_t |
947 | fd_parse_cdb(struct se_cmd *cmd) | |
0c2ad7d1 | 948 | { |
9e999a6c | 949 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
0c2ad7d1 CH |
950 | } |
951 | ||
b2320497 NB |
952 | DEF_TB_DEFAULT_ATTRIBS(fileio); |
953 | ||
954 | static struct configfs_attribute *fileio_backend_dev_attrs[] = { | |
955 | &fileio_dev_attrib_emulate_model_alias.attr, | |
956 | &fileio_dev_attrib_emulate_dpo.attr, | |
957 | &fileio_dev_attrib_emulate_fua_write.attr, | |
958 | &fileio_dev_attrib_emulate_fua_read.attr, | |
959 | &fileio_dev_attrib_emulate_write_cache.attr, | |
960 | &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr, | |
961 | &fileio_dev_attrib_emulate_tas.attr, | |
962 | &fileio_dev_attrib_emulate_tpu.attr, | |
963 | &fileio_dev_attrib_emulate_tpws.attr, | |
964 | &fileio_dev_attrib_emulate_caw.attr, | |
965 | &fileio_dev_attrib_emulate_3pc.attr, | |
966 | &fileio_dev_attrib_pi_prot_type.attr, | |
967 | &fileio_dev_attrib_hw_pi_prot_type.attr, | |
968 | &fileio_dev_attrib_pi_prot_format.attr, | |
969 | &fileio_dev_attrib_enforce_pr_isids.attr, | |
970 | &fileio_dev_attrib_is_nonrot.attr, | |
971 | &fileio_dev_attrib_emulate_rest_reord.attr, | |
972 | &fileio_dev_attrib_force_pr_aptpl.attr, | |
973 | &fileio_dev_attrib_hw_block_size.attr, | |
974 | &fileio_dev_attrib_block_size.attr, | |
975 | &fileio_dev_attrib_hw_max_sectors.attr, | |
b2320497 NB |
976 | &fileio_dev_attrib_optimal_sectors.attr, |
977 | &fileio_dev_attrib_hw_queue_depth.attr, | |
978 | &fileio_dev_attrib_queue_depth.attr, | |
979 | &fileio_dev_attrib_max_unmap_lba_count.attr, | |
980 | &fileio_dev_attrib_max_unmap_block_desc_count.attr, | |
981 | &fileio_dev_attrib_unmap_granularity.attr, | |
982 | &fileio_dev_attrib_unmap_granularity_alignment.attr, | |
983 | &fileio_dev_attrib_max_write_same_len.attr, | |
984 | NULL, | |
985 | }; | |
986 | ||
c66ac9db NB |
987 | static struct se_subsystem_api fileio_template = { |
988 | .name = "fileio", | |
0fd97ccf CH |
989 | .inquiry_prod = "FILEIO", |
990 | .inquiry_rev = FD_VERSION, | |
c66ac9db NB |
991 | .owner = THIS_MODULE, |
992 | .transport_type = TRANSPORT_PLUGIN_VHBA_PDEV, | |
993 | .attach_hba = fd_attach_hba, | |
994 | .detach_hba = fd_detach_hba, | |
0fd97ccf CH |
995 | .alloc_device = fd_alloc_device, |
996 | .configure_device = fd_configure_device, | |
c66ac9db | 997 | .free_device = fd_free_device, |
0c2ad7d1 | 998 | .parse_cdb = fd_parse_cdb, |
c66ac9db NB |
999 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
1000 | .show_configfs_dev_params = fd_show_configfs_dev_params, | |
6f23ac8a | 1001 | .get_device_type = sbc_get_device_type, |
c66ac9db | 1002 | .get_blocks = fd_get_blocks, |
0f5e2ec4 NB |
1003 | .init_prot = fd_init_prot, |
1004 | .format_prot = fd_format_prot, | |
1005 | .free_prot = fd_free_prot, | |
c66ac9db NB |
1006 | }; |
1007 | ||
1008 | static int __init fileio_module_init(void) | |
1009 | { | |
b2320497 NB |
1010 | struct target_backend_cits *tbc = &fileio_template.tb_cits; |
1011 | ||
1012 | target_core_setup_sub_cits(&fileio_template); | |
1013 | tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs; | |
1014 | ||
c66ac9db NB |
1015 | return transport_subsystem_register(&fileio_template); |
1016 | } | |
1017 | ||
63b91d5a | 1018 | static void __exit fileio_module_exit(void) |
c66ac9db NB |
1019 | { |
1020 | transport_subsystem_release(&fileio_template); | |
1021 | } | |
1022 | ||
1023 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); | |
1024 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1025 | MODULE_LICENSE("GPL"); | |
1026 | ||
1027 | module_init(fileio_module_init); | |
1028 | module_exit(fileio_module_exit); |