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; | |
42201b55 NB |
267 | loff_t pos = (cmd->t_task_lba * se_dev->prot_length); |
268 | unsigned char *buf; | |
c8367778 AM |
269 | u32 prot_size; |
270 | int rc, ret = 1; | |
42201b55 NB |
271 | |
272 | prot_size = (cmd->data_length / se_dev->dev_attrib.block_size) * | |
273 | se_dev->prot_length; | |
274 | ||
275 | if (!is_write) { | |
38da0f49 | 276 | fd_prot->prot_buf = kzalloc(prot_size, GFP_KERNEL); |
42201b55 NB |
277 | if (!fd_prot->prot_buf) { |
278 | pr_err("Unable to allocate fd_prot->prot_buf\n"); | |
279 | return -ENOMEM; | |
280 | } | |
281 | buf = fd_prot->prot_buf; | |
282 | ||
c8367778 AM |
283 | fd_prot->prot_sg_nents = 1; |
284 | fd_prot->prot_sg = kzalloc(sizeof(struct scatterlist), | |
285 | GFP_KERNEL); | |
42201b55 NB |
286 | if (!fd_prot->prot_sg) { |
287 | pr_err("Unable to allocate fd_prot->prot_sg\n"); | |
38da0f49 | 288 | kfree(fd_prot->prot_buf); |
42201b55 NB |
289 | return -ENOMEM; |
290 | } | |
38da0f49 | 291 | sg_init_table(fd_prot->prot_sg, fd_prot->prot_sg_nents); |
c8367778 | 292 | sg_set_buf(fd_prot->prot_sg, buf, prot_size); |
42201b55 NB |
293 | } |
294 | ||
295 | if (is_write) { | |
296 | rc = kernel_write(prot_fd, fd_prot->prot_buf, prot_size, pos); | |
297 | if (rc < 0 || prot_size != rc) { | |
298 | pr_err("kernel_write() for fd_do_prot_rw failed:" | |
299 | " %d\n", rc); | |
300 | ret = -EINVAL; | |
301 | } | |
302 | } else { | |
303 | rc = kernel_read(prot_fd, pos, fd_prot->prot_buf, prot_size); | |
304 | if (rc < 0) { | |
305 | pr_err("kernel_read() for fd_do_prot_rw failed:" | |
306 | " %d\n", rc); | |
307 | ret = -EINVAL; | |
308 | } | |
309 | } | |
310 | ||
311 | if (is_write || ret < 0) { | |
312 | kfree(fd_prot->prot_sg); | |
38da0f49 | 313 | kfree(fd_prot->prot_buf); |
42201b55 NB |
314 | } |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
778229af SAS |
319 | static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl, |
320 | u32 sgl_nents, int is_write) | |
c66ac9db | 321 | { |
5787cacd | 322 | struct se_device *se_dev = cmd->se_dev; |
0fd97ccf | 323 | struct fd_dev *dev = FD_DEV(se_dev); |
6708bb27 | 324 | struct file *fd = dev->fd_file; |
5787cacd | 325 | struct scatterlist *sg; |
6b9a44d0 CH |
326 | struct iov_iter iter; |
327 | struct bio_vec *bvec; | |
328 | ssize_t len = 0; | |
0fd97ccf | 329 | loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size); |
c66ac9db NB |
330 | int ret = 0, i; |
331 | ||
6b9a44d0 CH |
332 | bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL); |
333 | if (!bvec) { | |
6708bb27 | 334 | pr_err("Unable to allocate fd_do_readv iov[]\n"); |
e3d6f909 | 335 | return -ENOMEM; |
c66ac9db NB |
336 | } |
337 | ||
5787cacd | 338 | for_each_sg(sgl, sg, sgl_nents, i) { |
6b9a44d0 CH |
339 | bvec[i].bv_page = sg_page(sg); |
340 | bvec[i].bv_len = sg->length; | |
341 | bvec[i].bv_offset = sg->offset; | |
c66ac9db | 342 | |
6b9a44d0 CH |
343 | len += sg->length; |
344 | } | |
778229af | 345 | |
6b9a44d0 | 346 | iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len); |
778229af | 347 | if (is_write) |
6b9a44d0 | 348 | ret = vfs_iter_write(fd, &iter, &pos); |
778229af | 349 | else |
6b9a44d0 | 350 | ret = vfs_iter_read(fd, &iter, &pos); |
778229af | 351 | |
6b9a44d0 | 352 | kfree(bvec); |
778229af SAS |
353 | |
354 | if (is_write) { | |
5787cacd | 355 | if (ret < 0 || ret != cmd->data_length) { |
778229af | 356 | pr_err("%s() write returned %d\n", __func__, ret); |
e3d6f909 | 357 | return (ret < 0 ? ret : -EINVAL); |
c66ac9db NB |
358 | } |
359 | } else { | |
778229af SAS |
360 | /* |
361 | * Return zeros and GOOD status even if the READ did not return | |
362 | * the expected virt_size for struct file w/o a backing struct | |
363 | * block_device. | |
364 | */ | |
496ad9aa | 365 | if (S_ISBLK(file_inode(fd)->i_mode)) { |
778229af SAS |
366 | if (ret < 0 || ret != cmd->data_length) { |
367 | pr_err("%s() returned %d, expecting %u for " | |
368 | "S_ISBLK\n", __func__, ret, | |
369 | cmd->data_length); | |
370 | return (ret < 0 ? ret : -EINVAL); | |
371 | } | |
372 | } else { | |
373 | if (ret < 0) { | |
374 | pr_err("%s() returned %d for non S_ISBLK\n", | |
375 | __func__, ret); | |
376 | return ret; | |
377 | } | |
c66ac9db NB |
378 | } |
379 | } | |
c66ac9db NB |
380 | return 1; |
381 | } | |
382 | ||
de103c93 CH |
383 | static sense_reason_t |
384 | fd_execute_sync_cache(struct se_cmd *cmd) | |
c66ac9db | 385 | { |
c66ac9db | 386 | struct se_device *dev = cmd->se_dev; |
0fd97ccf | 387 | struct fd_dev *fd_dev = FD_DEV(dev); |
a1d8b49a | 388 | int immed = (cmd->t_task_cdb[1] & 0x2); |
c66ac9db NB |
389 | loff_t start, end; |
390 | int ret; | |
391 | ||
392 | /* | |
393 | * If the Immediate bit is set, queue up the GOOD response | |
394 | * for this SYNCHRONIZE_CACHE op | |
395 | */ | |
396 | if (immed) | |
5787cacd | 397 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
c66ac9db NB |
398 | |
399 | /* | |
400 | * Determine if we will be flushing the entire device. | |
401 | */ | |
a1d8b49a | 402 | if (cmd->t_task_lba == 0 && cmd->data_length == 0) { |
c66ac9db NB |
403 | start = 0; |
404 | end = LLONG_MAX; | |
405 | } else { | |
0fd97ccf | 406 | start = cmd->t_task_lba * dev->dev_attrib.block_size; |
c66ac9db | 407 | if (cmd->data_length) |
62d3ab49 | 408 | end = start + cmd->data_length - 1; |
c66ac9db NB |
409 | else |
410 | end = LLONG_MAX; | |
411 | } | |
412 | ||
413 | ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1); | |
414 | if (ret != 0) | |
6708bb27 | 415 | pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret); |
c66ac9db | 416 | |
5787cacd | 417 | if (immed) |
ad67f0d9 | 418 | return 0; |
5787cacd | 419 | |
de103c93 | 420 | if (ret) |
5787cacd | 421 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
de103c93 | 422 | else |
5787cacd | 423 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
ad67f0d9 CH |
424 | |
425 | return 0; | |
c66ac9db NB |
426 | } |
427 | ||
7b745c84 NB |
428 | static sense_reason_t |
429 | fd_execute_write_same(struct se_cmd *cmd) | |
430 | { | |
431 | struct se_device *se_dev = cmd->se_dev; | |
432 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
7b745c84 | 433 | loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
d4c5dcac CH |
434 | sector_t nolb = sbc_get_write_same_sectors(cmd); |
435 | struct iov_iter iter; | |
436 | struct bio_vec *bvec; | |
437 | unsigned int len = 0, i; | |
438 | ssize_t ret; | |
7b745c84 NB |
439 | |
440 | if (!nolb) { | |
441 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
442 | return 0; | |
443 | } | |
afd73f1b NB |
444 | if (cmd->prot_op) { |
445 | pr_err("WRITE_SAME: Protection information with FILEIO" | |
446 | " backends not supported\n"); | |
447 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
448 | } | |
7b745c84 NB |
449 | |
450 | if (cmd->t_data_nents > 1 || | |
d4c5dcac | 451 | cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) { |
7b745c84 | 452 | pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u" |
d4c5dcac CH |
453 | " block_size: %u\n", |
454 | cmd->t_data_nents, | |
455 | cmd->t_data_sg[0].length, | |
7b745c84 NB |
456 | cmd->se_dev->dev_attrib.block_size); |
457 | return TCM_INVALID_CDB_FIELD; | |
458 | } | |
459 | ||
d4c5dcac CH |
460 | bvec = kcalloc(nolb, sizeof(struct bio_vec), GFP_KERNEL); |
461 | if (!bvec) | |
7b745c84 NB |
462 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
463 | ||
d4c5dcac CH |
464 | for (i = 0; i < nolb; i++) { |
465 | bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]); | |
466 | bvec[i].bv_len = cmd->t_data_sg[0].length; | |
467 | bvec[i].bv_offset = cmd->t_data_sg[0].offset; | |
7b745c84 | 468 | |
d4c5dcac CH |
469 | len += se_dev->dev_attrib.block_size; |
470 | } | |
7b745c84 | 471 | |
d4c5dcac CH |
472 | iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len); |
473 | ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos); | |
7b745c84 | 474 | |
d4c5dcac CH |
475 | kfree(bvec); |
476 | if (ret < 0 || ret != len) { | |
477 | pr_err("vfs_iter_write() returned %zd for write same\n", ret); | |
7b745c84 NB |
478 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
479 | } | |
480 | ||
481 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
482 | return 0; | |
483 | } | |
484 | ||
64d240b7 AM |
485 | static int |
486 | fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb, | |
487 | void *buf, size_t bufsize) | |
488 | { | |
489 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
490 | struct file *prot_fd = fd_dev->fd_prot_file; | |
491 | sector_t prot_length, prot; | |
492 | loff_t pos = lba * se_dev->prot_length; | |
493 | ||
494 | if (!prot_fd) { | |
495 | pr_err("Unable to locate fd_dev->fd_prot_file\n"); | |
496 | return -ENODEV; | |
497 | } | |
498 | ||
499 | prot_length = nolb * se_dev->prot_length; | |
500 | ||
501 | for (prot = 0; prot < prot_length;) { | |
502 | sector_t len = min_t(sector_t, bufsize, prot_length - prot); | |
503 | ssize_t ret = kernel_write(prot_fd, buf, len, pos + prot); | |
504 | ||
505 | if (ret != len) { | |
506 | pr_err("vfs_write to prot file failed: %zd\n", ret); | |
507 | return ret < 0 ? ret : -ENODEV; | |
508 | } | |
509 | prot += ret; | |
510 | } | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static int | |
516 | fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb) | |
517 | { | |
518 | void *buf; | |
519 | int rc; | |
520 | ||
521 | buf = (void *)__get_free_page(GFP_KERNEL); | |
522 | if (!buf) { | |
523 | pr_err("Unable to allocate FILEIO prot buf\n"); | |
524 | return -ENOMEM; | |
525 | } | |
526 | memset(buf, 0xff, PAGE_SIZE); | |
527 | ||
528 | rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE); | |
529 | ||
530 | free_page((unsigned long)buf); | |
531 | ||
532 | return rc; | |
533 | } | |
534 | ||
70d3ae5c | 535 | static sense_reason_t |
86d71829 | 536 | fd_do_unmap(struct se_cmd *cmd, void *priv, sector_t lba, sector_t nolb) |
70d3ae5c | 537 | { |
86d71829 | 538 | struct file *file = priv; |
70d3ae5c | 539 | struct inode *inode = file->f_mapping->host; |
70d3ae5c AH |
540 | int ret; |
541 | ||
64d240b7 AM |
542 | if (cmd->se_dev->dev_attrib.pi_prot_type) { |
543 | ret = fd_do_prot_unmap(cmd, lba, nolb); | |
544 | if (ret) | |
545 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
546 | } | |
547 | ||
70d3ae5c AH |
548 | if (S_ISBLK(inode->i_mode)) { |
549 | /* The backend is block device, use discard */ | |
550 | struct block_device *bdev = inode->i_bdev; | |
551 | ||
43f55bbb | 552 | ret = blkdev_issue_discard(bdev, lba, |
70d3ae5c AH |
553 | nolb, GFP_KERNEL, 0); |
554 | if (ret < 0) { | |
555 | pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", | |
556 | ret); | |
557 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
558 | } | |
559 | } else { | |
560 | /* The backend is normal file, use fallocate */ | |
43f55bbb AH |
561 | struct se_device *se_dev = cmd->se_dev; |
562 | loff_t pos = lba * se_dev->dev_attrib.block_size; | |
70d3ae5c AH |
563 | unsigned int len = nolb * se_dev->dev_attrib.block_size; |
564 | int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; | |
565 | ||
566 | if (!file->f_op->fallocate) | |
567 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
568 | ||
569 | ret = file->f_op->fallocate(file, mode, pos, len); | |
570 | if (ret < 0) { | |
571 | pr_warn("FILEIO: fallocate() failed: %d\n", ret); | |
572 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
573 | } | |
574 | } | |
575 | ||
43f55bbb AH |
576 | return 0; |
577 | } | |
578 | ||
579 | static sense_reason_t | |
580 | fd_execute_write_same_unmap(struct se_cmd *cmd) | |
581 | { | |
582 | struct se_device *se_dev = cmd->se_dev; | |
583 | struct fd_dev *fd_dev = FD_DEV(se_dev); | |
584 | struct file *file = fd_dev->fd_file; | |
585 | sector_t lba = cmd->t_task_lba; | |
586 | sector_t nolb = sbc_get_write_same_sectors(cmd); | |
3abff1e5 | 587 | sense_reason_t ret; |
43f55bbb AH |
588 | |
589 | if (!nolb) { | |
590 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
591 | return 0; | |
592 | } | |
593 | ||
594 | ret = fd_do_unmap(cmd, file, lba, nolb); | |
595 | if (ret) | |
596 | return ret; | |
597 | ||
70d3ae5c AH |
598 | target_complete_cmd(cmd, GOOD); |
599 | return 0; | |
600 | } | |
601 | ||
50642762 AH |
602 | static sense_reason_t |
603 | fd_execute_unmap(struct se_cmd *cmd) | |
604 | { | |
86d71829 | 605 | struct file *file = FD_DEV(cmd->se_dev)->fd_file; |
50642762 | 606 | |
86d71829 | 607 | return sbc_execute_unmap(cmd, fd_do_unmap, file); |
50642762 AH |
608 | } |
609 | ||
de103c93 | 610 | static sense_reason_t |
a82a9538 NB |
611 | fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
612 | enum dma_data_direction data_direction) | |
c66ac9db | 613 | { |
c66ac9db | 614 | struct se_device *dev = cmd->se_dev; |
42201b55 NB |
615 | struct fd_prot fd_prot; |
616 | sense_reason_t rc; | |
c66ac9db | 617 | int ret = 0; |
046ba642 NB |
618 | /* |
619 | * We are currently limited by the number of iovecs (2048) per | |
620 | * single vfs_[writev,readv] call. | |
621 | */ | |
622 | if (cmd->data_length > FD_MAX_BYTES) { | |
623 | pr_err("FILEIO: Not able to process I/O of %u bytes due to" | |
624 | "FD_MAX_BYTES: %u iovec count limitiation\n", | |
625 | cmd->data_length, FD_MAX_BYTES); | |
626 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
627 | } | |
c66ac9db NB |
628 | /* |
629 | * Call vectorized fileio functions to map struct scatterlist | |
630 | * physical memory addresses to struct iovec virtual memory. | |
631 | */ | |
5787cacd | 632 | if (data_direction == DMA_FROM_DEVICE) { |
42201b55 NB |
633 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
634 | ||
ee920469 | 635 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
42201b55 NB |
636 | ret = fd_do_prot_rw(cmd, &fd_prot, false); |
637 | if (ret < 0) | |
638 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
639 | } | |
640 | ||
778229af | 641 | ret = fd_do_rw(cmd, sgl, sgl_nents, 0); |
42201b55 | 642 | |
ee920469 | 643 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
42201b55 NB |
644 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
645 | ||
f75b6fae SG |
646 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
647 | 0, fd_prot.prot_sg, 0); | |
42201b55 NB |
648 | if (rc) { |
649 | kfree(fd_prot.prot_sg); | |
38da0f49 | 650 | kfree(fd_prot.prot_buf); |
42201b55 NB |
651 | return rc; |
652 | } | |
f75b6fae | 653 | sbc_dif_copy_prot(cmd, sectors, true, fd_prot.prot_sg, 0); |
42201b55 | 654 | kfree(fd_prot.prot_sg); |
38da0f49 | 655 | kfree(fd_prot.prot_buf); |
42201b55 | 656 | } |
c66ac9db | 657 | } else { |
42201b55 NB |
658 | memset(&fd_prot, 0, sizeof(struct fd_prot)); |
659 | ||
ee920469 | 660 | if (cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
42201b55 NB |
661 | u32 sectors = cmd->data_length / dev->dev_attrib.block_size; |
662 | ||
663 | ret = fd_do_prot_rw(cmd, &fd_prot, false); | |
664 | if (ret < 0) | |
665 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
666 | ||
f75b6fae SG |
667 | rc = sbc_dif_verify(cmd, cmd->t_task_lba, sectors, |
668 | 0, cmd->t_prot_sg, 0); | |
42201b55 NB |
669 | if (rc) { |
670 | kfree(fd_prot.prot_sg); | |
38da0f49 | 671 | kfree(fd_prot.prot_buf); |
42201b55 NB |
672 | return rc; |
673 | } | |
f75b6fae | 674 | sbc_dif_copy_prot(cmd, sectors, false, fd_prot.prot_sg, 0); |
42201b55 NB |
675 | } |
676 | ||
778229af | 677 | ret = fd_do_rw(cmd, sgl, sgl_nents, 1); |
a4dff304 | 678 | /* |
125d0119 | 679 | * Perform implicit vfs_fsync_range() for fd_do_writev() ops |
a4dff304 NB |
680 | * for SCSI WRITEs with Forced Unit Access (FUA) set. |
681 | * Allow this to happen independent of WCE=0 setting. | |
682 | */ | |
c66ac9db | 683 | if (ret > 0 && |
0fd97ccf | 684 | dev->dev_attrib.emulate_fua_write > 0 && |
2d3a4b51 | 685 | (cmd->se_cmd_flags & SCF_FUA)) { |
0fd97ccf | 686 | struct fd_dev *fd_dev = FD_DEV(dev); |
a4dff304 | 687 | loff_t start = cmd->t_task_lba * |
0fd97ccf | 688 | dev->dev_attrib.block_size; |
62d3ab49 ZB |
689 | loff_t end; |
690 | ||
691 | if (cmd->data_length) | |
692 | end = start + cmd->data_length - 1; | |
693 | else | |
694 | end = LLONG_MAX; | |
c66ac9db | 695 | |
a4dff304 NB |
696 | vfs_fsync_range(fd_dev->fd_file, start, end, 1); |
697 | } | |
42201b55 | 698 | |
ee920469 | 699 | if (ret > 0 && cmd->prot_type && dev->dev_attrib.pi_prot_type) { |
42201b55 NB |
700 | ret = fd_do_prot_rw(cmd, &fd_prot, true); |
701 | if (ret < 0) | |
702 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
703 | } | |
c66ac9db NB |
704 | } |
705 | ||
42201b55 NB |
706 | if (ret < 0) { |
707 | kfree(fd_prot.prot_sg); | |
38da0f49 | 708 | kfree(fd_prot.prot_buf); |
de103c93 | 709 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
42201b55 | 710 | } |
de103c93 | 711 | |
5787cacd CH |
712 | if (ret) |
713 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
03e98c9e | 714 | return 0; |
c66ac9db NB |
715 | } |
716 | ||
c66ac9db NB |
717 | enum { |
718 | Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err | |
719 | }; | |
720 | ||
721 | static match_table_t tokens = { | |
722 | {Opt_fd_dev_name, "fd_dev_name=%s"}, | |
723 | {Opt_fd_dev_size, "fd_dev_size=%s"}, | |
b32f4c7e | 724 | {Opt_fd_buffered_io, "fd_buffered_io=%d"}, |
c66ac9db NB |
725 | {Opt_err, NULL} |
726 | }; | |
727 | ||
0fd97ccf CH |
728 | static ssize_t fd_set_configfs_dev_params(struct se_device *dev, |
729 | const char *page, ssize_t count) | |
c66ac9db | 730 | { |
0fd97ccf | 731 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
732 | char *orig, *ptr, *arg_p, *opts; |
733 | substring_t args[MAX_OPT_ARGS]; | |
b32f4c7e | 734 | int ret = 0, arg, token; |
c66ac9db NB |
735 | |
736 | opts = kstrdup(page, GFP_KERNEL); | |
737 | if (!opts) | |
738 | return -ENOMEM; | |
739 | ||
740 | orig = opts; | |
741 | ||
90c161b6 | 742 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
743 | if (!*ptr) |
744 | continue; | |
745 | ||
746 | token = match_token(ptr, tokens, args); | |
747 | switch (token) { | |
748 | case Opt_fd_dev_name: | |
dbc6e022 AV |
749 | if (match_strlcpy(fd_dev->fd_dev_name, &args[0], |
750 | FD_MAX_DEV_NAME) == 0) { | |
751 | ret = -EINVAL; | |
6d180253 JJ |
752 | break; |
753 | } | |
6708bb27 | 754 | pr_debug("FILEIO: Referencing Path: %s\n", |
c66ac9db NB |
755 | fd_dev->fd_dev_name); |
756 | fd_dev->fbd_flags |= FBDF_HAS_PATH; | |
757 | break; | |
758 | case Opt_fd_dev_size: | |
759 | arg_p = match_strdup(&args[0]); | |
6d180253 JJ |
760 | if (!arg_p) { |
761 | ret = -ENOMEM; | |
762 | break; | |
763 | } | |
57103d7f | 764 | ret = kstrtoull(arg_p, 0, &fd_dev->fd_dev_size); |
6d180253 | 765 | kfree(arg_p); |
c66ac9db | 766 | if (ret < 0) { |
57103d7f | 767 | pr_err("kstrtoull() failed for" |
c66ac9db NB |
768 | " fd_dev_size=\n"); |
769 | goto out; | |
770 | } | |
6708bb27 | 771 | pr_debug("FILEIO: Referencing Size: %llu" |
c66ac9db NB |
772 | " bytes\n", fd_dev->fd_dev_size); |
773 | fd_dev->fbd_flags |= FBDF_HAS_SIZE; | |
774 | break; | |
b32f4c7e | 775 | case Opt_fd_buffered_io: |
ce31c1b0 JE |
776 | ret = match_int(args, &arg); |
777 | if (ret) | |
778 | goto out; | |
b32f4c7e NB |
779 | if (arg != 1) { |
780 | pr_err("bogus fd_buffered_io=%d value\n", arg); | |
781 | ret = -EINVAL; | |
782 | goto out; | |
783 | } | |
784 | ||
785 | pr_debug("FILEIO: Using buffered I/O" | |
786 | " operations for struct fd_dev\n"); | |
787 | ||
788 | fd_dev->fbd_flags |= FDBD_HAS_BUFFERED_IO_WCE; | |
789 | break; | |
c66ac9db NB |
790 | default: |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
795 | out: | |
796 | kfree(orig); | |
797 | return (!ret) ? count : ret; | |
798 | } | |
799 | ||
0fd97ccf | 800 | static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 801 | { |
0fd97ccf | 802 | struct fd_dev *fd_dev = FD_DEV(dev); |
c66ac9db NB |
803 | ssize_t bl = 0; |
804 | ||
805 | bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id); | |
b32f4c7e NB |
806 | bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n", |
807 | fd_dev->fd_dev_name, fd_dev->fd_dev_size, | |
808 | (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) ? | |
809 | "Buffered-WCE" : "O_DSYNC"); | |
c66ac9db NB |
810 | return bl; |
811 | } | |
812 | ||
c66ac9db NB |
813 | static sector_t fd_get_blocks(struct se_device *dev) |
814 | { | |
0fd97ccf | 815 | struct fd_dev *fd_dev = FD_DEV(dev); |
cd9323fd NB |
816 | struct file *f = fd_dev->fd_file; |
817 | struct inode *i = f->f_mapping->host; | |
818 | unsigned long long dev_size; | |
819 | /* | |
820 | * When using a file that references an underlying struct block_device, | |
821 | * ensure dev_size is always based on the current inode size in order | |
822 | * to handle underlying block_device resize operations. | |
823 | */ | |
824 | if (S_ISBLK(i->i_mode)) | |
21363ca8 | 825 | dev_size = i_size_read(i); |
cd9323fd NB |
826 | else |
827 | dev_size = fd_dev->fd_dev_size; | |
c66ac9db | 828 | |
21363ca8 NB |
829 | return div_u64(dev_size - dev->dev_attrib.block_size, |
830 | dev->dev_attrib.block_size); | |
c66ac9db NB |
831 | } |
832 | ||
0f5e2ec4 NB |
833 | static int fd_init_prot(struct se_device *dev) |
834 | { | |
835 | struct fd_dev *fd_dev = FD_DEV(dev); | |
836 | struct file *prot_file, *file = fd_dev->fd_file; | |
837 | struct inode *inode; | |
838 | int ret, flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC; | |
839 | char buf[FD_MAX_DEV_PROT_NAME]; | |
840 | ||
841 | if (!file) { | |
842 | pr_err("Unable to locate fd_dev->fd_file\n"); | |
843 | return -ENODEV; | |
844 | } | |
845 | ||
846 | inode = file->f_mapping->host; | |
847 | if (S_ISBLK(inode->i_mode)) { | |
848 | pr_err("FILEIO Protection emulation only supported on" | |
849 | " !S_ISBLK\n"); | |
850 | return -ENOSYS; | |
851 | } | |
852 | ||
853 | if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) | |
854 | flags &= ~O_DSYNC; | |
855 | ||
856 | snprintf(buf, FD_MAX_DEV_PROT_NAME, "%s.protection", | |
857 | fd_dev->fd_dev_name); | |
858 | ||
859 | prot_file = filp_open(buf, flags, 0600); | |
860 | if (IS_ERR(prot_file)) { | |
861 | pr_err("filp_open(%s) failed\n", buf); | |
862 | ret = PTR_ERR(prot_file); | |
863 | return ret; | |
864 | } | |
865 | fd_dev->fd_prot_file = prot_file; | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
0f5e2ec4 NB |
870 | static int fd_format_prot(struct se_device *dev) |
871 | { | |
0f5e2ec4 | 872 | unsigned char *buf; |
0f5e2ec4 | 873 | int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size; |
64d240b7 | 874 | int ret; |
0f5e2ec4 NB |
875 | |
876 | if (!dev->dev_attrib.pi_prot_type) { | |
877 | pr_err("Unable to format_prot while pi_prot_type == 0\n"); | |
878 | return -ENODEV; | |
879 | } | |
0f5e2ec4 | 880 | |
0f5e2ec4 NB |
881 | buf = vzalloc(unit_size); |
882 | if (!buf) { | |
883 | pr_err("Unable to allocate FILEIO prot buf\n"); | |
884 | return -ENOMEM; | |
885 | } | |
0f5e2ec4 NB |
886 | |
887 | pr_debug("Using FILEIO prot_length: %llu\n", | |
64d240b7 AM |
888 | (unsigned long long)(dev->transport->get_blocks(dev) + 1) * |
889 | dev->prot_length); | |
0f5e2ec4 | 890 | |
80dcd0c1 | 891 | memset(buf, 0xff, unit_size); |
64d240b7 AM |
892 | ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1, |
893 | buf, unit_size); | |
0f5e2ec4 NB |
894 | vfree(buf); |
895 | return ret; | |
896 | } | |
897 | ||
898 | static void fd_free_prot(struct se_device *dev) | |
899 | { | |
900 | struct fd_dev *fd_dev = FD_DEV(dev); | |
901 | ||
902 | if (!fd_dev->fd_prot_file) | |
903 | return; | |
904 | ||
905 | filp_close(fd_dev->fd_prot_file, NULL); | |
906 | fd_dev->fd_prot_file = NULL; | |
907 | } | |
908 | ||
9e999a6c | 909 | static struct sbc_ops fd_sbc_ops = { |
0c2ad7d1 | 910 | .execute_rw = fd_execute_rw, |
ad67f0d9 | 911 | .execute_sync_cache = fd_execute_sync_cache, |
7b745c84 | 912 | .execute_write_same = fd_execute_write_same, |
70d3ae5c | 913 | .execute_write_same_unmap = fd_execute_write_same_unmap, |
50642762 | 914 | .execute_unmap = fd_execute_unmap, |
0c2ad7d1 CH |
915 | }; |
916 | ||
de103c93 CH |
917 | static sense_reason_t |
918 | fd_parse_cdb(struct se_cmd *cmd) | |
0c2ad7d1 | 919 | { |
9e999a6c | 920 | return sbc_parse_cdb(cmd, &fd_sbc_ops); |
0c2ad7d1 CH |
921 | } |
922 | ||
b2320497 NB |
923 | DEF_TB_DEFAULT_ATTRIBS(fileio); |
924 | ||
925 | static struct configfs_attribute *fileio_backend_dev_attrs[] = { | |
926 | &fileio_dev_attrib_emulate_model_alias.attr, | |
927 | &fileio_dev_attrib_emulate_dpo.attr, | |
928 | &fileio_dev_attrib_emulate_fua_write.attr, | |
929 | &fileio_dev_attrib_emulate_fua_read.attr, | |
930 | &fileio_dev_attrib_emulate_write_cache.attr, | |
931 | &fileio_dev_attrib_emulate_ua_intlck_ctrl.attr, | |
932 | &fileio_dev_attrib_emulate_tas.attr, | |
933 | &fileio_dev_attrib_emulate_tpu.attr, | |
934 | &fileio_dev_attrib_emulate_tpws.attr, | |
935 | &fileio_dev_attrib_emulate_caw.attr, | |
936 | &fileio_dev_attrib_emulate_3pc.attr, | |
937 | &fileio_dev_attrib_pi_prot_type.attr, | |
938 | &fileio_dev_attrib_hw_pi_prot_type.attr, | |
939 | &fileio_dev_attrib_pi_prot_format.attr, | |
940 | &fileio_dev_attrib_enforce_pr_isids.attr, | |
941 | &fileio_dev_attrib_is_nonrot.attr, | |
942 | &fileio_dev_attrib_emulate_rest_reord.attr, | |
943 | &fileio_dev_attrib_force_pr_aptpl.attr, | |
944 | &fileio_dev_attrib_hw_block_size.attr, | |
945 | &fileio_dev_attrib_block_size.attr, | |
946 | &fileio_dev_attrib_hw_max_sectors.attr, | |
b2320497 NB |
947 | &fileio_dev_attrib_optimal_sectors.attr, |
948 | &fileio_dev_attrib_hw_queue_depth.attr, | |
949 | &fileio_dev_attrib_queue_depth.attr, | |
950 | &fileio_dev_attrib_max_unmap_lba_count.attr, | |
951 | &fileio_dev_attrib_max_unmap_block_desc_count.attr, | |
952 | &fileio_dev_attrib_unmap_granularity.attr, | |
953 | &fileio_dev_attrib_unmap_granularity_alignment.attr, | |
954 | &fileio_dev_attrib_max_write_same_len.attr, | |
955 | NULL, | |
956 | }; | |
957 | ||
c66ac9db NB |
958 | static struct se_subsystem_api fileio_template = { |
959 | .name = "fileio", | |
0fd97ccf CH |
960 | .inquiry_prod = "FILEIO", |
961 | .inquiry_rev = FD_VERSION, | |
c66ac9db | 962 | .owner = THIS_MODULE, |
c66ac9db NB |
963 | .attach_hba = fd_attach_hba, |
964 | .detach_hba = fd_detach_hba, | |
0fd97ccf CH |
965 | .alloc_device = fd_alloc_device, |
966 | .configure_device = fd_configure_device, | |
c66ac9db | 967 | .free_device = fd_free_device, |
0c2ad7d1 | 968 | .parse_cdb = fd_parse_cdb, |
c66ac9db NB |
969 | .set_configfs_dev_params = fd_set_configfs_dev_params, |
970 | .show_configfs_dev_params = fd_show_configfs_dev_params, | |
6f23ac8a | 971 | .get_device_type = sbc_get_device_type, |
c66ac9db | 972 | .get_blocks = fd_get_blocks, |
0f5e2ec4 NB |
973 | .init_prot = fd_init_prot, |
974 | .format_prot = fd_format_prot, | |
975 | .free_prot = fd_free_prot, | |
c66ac9db NB |
976 | }; |
977 | ||
978 | static int __init fileio_module_init(void) | |
979 | { | |
b2320497 NB |
980 | struct target_backend_cits *tbc = &fileio_template.tb_cits; |
981 | ||
982 | target_core_setup_sub_cits(&fileio_template); | |
983 | tbc->tb_dev_attrib_cit.ct_attrs = fileio_backend_dev_attrs; | |
984 | ||
c66ac9db NB |
985 | return transport_subsystem_register(&fileio_template); |
986 | } | |
987 | ||
63b91d5a | 988 | static void __exit fileio_module_exit(void) |
c66ac9db NB |
989 | { |
990 | transport_subsystem_release(&fileio_template); | |
991 | } | |
992 | ||
993 | MODULE_DESCRIPTION("TCM FILEIO subsystem plugin"); | |
994 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
995 | MODULE_LICENSE("GPL"); | |
996 | ||
997 | module_init(fileio_module_init); | |
998 | module_exit(fileio_module_exit); |