Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_rd.c | |
3 | * | |
4 | * This file contains the Storage Engine <-> Ramdisk transport | |
5 | * specific functions. | |
6 | * | |
fd9a11d7 | 7 | * (c) Copyright 2003-2012 RisingTide Systems LLC. |
c66ac9db NB |
8 | * |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
c66ac9db NB |
27 | #include <linux/string.h> |
28 | #include <linux/parser.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/blkdev.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/spinlock.h> | |
c66ac9db NB |
33 | #include <scsi/scsi.h> |
34 | #include <scsi/scsi_host.h> | |
35 | ||
36 | #include <target/target_core_base.h> | |
c4795fb2 | 37 | #include <target/target_core_backend.h> |
c66ac9db NB |
38 | |
39 | #include "target_core_rd.h" | |
40 | ||
0fd97ccf CH |
41 | static inline struct rd_dev *RD_DEV(struct se_device *dev) |
42 | { | |
43 | return container_of(dev, struct rd_dev, dev); | |
44 | } | |
c66ac9db | 45 | |
c66ac9db NB |
46 | /* rd_attach_hba(): (Part of se_subsystem_api_t template) |
47 | * | |
48 | * | |
49 | */ | |
50 | static int rd_attach_hba(struct se_hba *hba, u32 host_id) | |
51 | { | |
52 | struct rd_host *rd_host; | |
53 | ||
54 | rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL); | |
6708bb27 AG |
55 | if (!rd_host) { |
56 | pr_err("Unable to allocate memory for struct rd_host\n"); | |
c66ac9db NB |
57 | return -ENOMEM; |
58 | } | |
59 | ||
60 | rd_host->rd_host_id = host_id; | |
61 | ||
5951146d | 62 | hba->hba_ptr = rd_host; |
c66ac9db | 63 | |
6708bb27 | 64 | pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on" |
c66ac9db NB |
65 | " Generic Target Core Stack %s\n", hba->hba_id, |
66 | RD_HBA_VERSION, TARGET_CORE_MOD_VERSION); | |
c66ac9db NB |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static void rd_detach_hba(struct se_hba *hba) | |
72 | { | |
73 | struct rd_host *rd_host = hba->hba_ptr; | |
74 | ||
6708bb27 | 75 | pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from" |
c66ac9db NB |
76 | " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id); |
77 | ||
78 | kfree(rd_host); | |
79 | hba->hba_ptr = NULL; | |
80 | } | |
81 | ||
82 | /* rd_release_device_space(): | |
83 | * | |
84 | * | |
85 | */ | |
86 | static void rd_release_device_space(struct rd_dev *rd_dev) | |
87 | { | |
88 | u32 i, j, page_count = 0, sg_per_table; | |
89 | struct rd_dev_sg_table *sg_table; | |
90 | struct page *pg; | |
91 | struct scatterlist *sg; | |
92 | ||
93 | if (!rd_dev->sg_table_array || !rd_dev->sg_table_count) | |
94 | return; | |
95 | ||
96 | sg_table = rd_dev->sg_table_array; | |
97 | ||
98 | for (i = 0; i < rd_dev->sg_table_count; i++) { | |
99 | sg = sg_table[i].sg_table; | |
100 | sg_per_table = sg_table[i].rd_sg_count; | |
101 | ||
102 | for (j = 0; j < sg_per_table; j++) { | |
103 | pg = sg_page(&sg[j]); | |
6708bb27 | 104 | if (pg) { |
c66ac9db NB |
105 | __free_page(pg); |
106 | page_count++; | |
107 | } | |
108 | } | |
109 | ||
110 | kfree(sg); | |
111 | } | |
112 | ||
6708bb27 | 113 | pr_debug("CORE_RD[%u] - Released device space for Ramdisk" |
c66ac9db NB |
114 | " Device ID: %u, pages %u in %u tables total bytes %lu\n", |
115 | rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count, | |
116 | rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE); | |
117 | ||
118 | kfree(sg_table); | |
119 | rd_dev->sg_table_array = NULL; | |
120 | rd_dev->sg_table_count = 0; | |
121 | } | |
122 | ||
123 | ||
124 | /* rd_build_device_space(): | |
125 | * | |
126 | * | |
127 | */ | |
128 | static int rd_build_device_space(struct rd_dev *rd_dev) | |
129 | { | |
130 | u32 i = 0, j, page_offset = 0, sg_per_table, sg_tables, total_sg_needed; | |
131 | u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE / | |
132 | sizeof(struct scatterlist)); | |
133 | struct rd_dev_sg_table *sg_table; | |
134 | struct page *pg; | |
135 | struct scatterlist *sg; | |
136 | ||
137 | if (rd_dev->rd_page_count <= 0) { | |
6708bb27 | 138 | pr_err("Illegal page count: %u for Ramdisk device\n", |
c66ac9db | 139 | rd_dev->rd_page_count); |
065f9716 | 140 | return -EINVAL; |
c66ac9db | 141 | } |
670caa9f AG |
142 | |
143 | /* Don't need backing pages for NULLIO */ | |
144 | if (rd_dev->rd_flags & RDF_NULLIO) | |
145 | return 0; | |
146 | ||
c66ac9db NB |
147 | total_sg_needed = rd_dev->rd_page_count; |
148 | ||
149 | sg_tables = (total_sg_needed / max_sg_per_table) + 1; | |
150 | ||
151 | sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL); | |
6708bb27 AG |
152 | if (!sg_table) { |
153 | pr_err("Unable to allocate memory for Ramdisk" | |
c66ac9db | 154 | " scatterlist tables\n"); |
065f9716 | 155 | return -ENOMEM; |
c66ac9db NB |
156 | } |
157 | ||
158 | rd_dev->sg_table_array = sg_table; | |
159 | rd_dev->sg_table_count = sg_tables; | |
160 | ||
161 | while (total_sg_needed) { | |
162 | sg_per_table = (total_sg_needed > max_sg_per_table) ? | |
163 | max_sg_per_table : total_sg_needed; | |
164 | ||
165 | sg = kzalloc(sg_per_table * sizeof(struct scatterlist), | |
166 | GFP_KERNEL); | |
6708bb27 AG |
167 | if (!sg) { |
168 | pr_err("Unable to allocate scatterlist array" | |
c66ac9db | 169 | " for struct rd_dev\n"); |
065f9716 | 170 | return -ENOMEM; |
c66ac9db NB |
171 | } |
172 | ||
6708bb27 | 173 | sg_init_table(sg, sg_per_table); |
c66ac9db NB |
174 | |
175 | sg_table[i].sg_table = sg; | |
176 | sg_table[i].rd_sg_count = sg_per_table; | |
177 | sg_table[i].page_start_offset = page_offset; | |
178 | sg_table[i++].page_end_offset = (page_offset + sg_per_table) | |
179 | - 1; | |
180 | ||
181 | for (j = 0; j < sg_per_table; j++) { | |
182 | pg = alloc_pages(GFP_KERNEL, 0); | |
6708bb27 AG |
183 | if (!pg) { |
184 | pr_err("Unable to allocate scatterlist" | |
c66ac9db | 185 | " pages for struct rd_dev_sg_table\n"); |
065f9716 | 186 | return -ENOMEM; |
c66ac9db NB |
187 | } |
188 | sg_assign_page(&sg[j], pg); | |
189 | sg[j].length = PAGE_SIZE; | |
190 | } | |
191 | ||
192 | page_offset += sg_per_table; | |
193 | total_sg_needed -= sg_per_table; | |
194 | } | |
195 | ||
6708bb27 | 196 | pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of" |
c66ac9db NB |
197 | " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id, |
198 | rd_dev->rd_dev_id, rd_dev->rd_page_count, | |
199 | rd_dev->sg_table_count); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
0fd97ccf | 204 | static struct se_device *rd_alloc_device(struct se_hba *hba, const char *name) |
c66ac9db NB |
205 | { |
206 | struct rd_dev *rd_dev; | |
207 | struct rd_host *rd_host = hba->hba_ptr; | |
208 | ||
209 | rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL); | |
6708bb27 AG |
210 | if (!rd_dev) { |
211 | pr_err("Unable to allocate memory for struct rd_dev\n"); | |
c66ac9db NB |
212 | return NULL; |
213 | } | |
214 | ||
215 | rd_dev->rd_host = rd_host; | |
c66ac9db | 216 | |
0fd97ccf | 217 | return &rd_dev->dev; |
c66ac9db NB |
218 | } |
219 | ||
0fd97ccf | 220 | static int rd_configure_device(struct se_device *dev) |
c66ac9db | 221 | { |
0fd97ccf CH |
222 | struct rd_dev *rd_dev = RD_DEV(dev); |
223 | struct rd_host *rd_host = dev->se_hba->hba_ptr; | |
224 | int ret; | |
c66ac9db | 225 | |
0fd97ccf CH |
226 | if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) { |
227 | pr_debug("Missing rd_pages= parameter\n"); | |
228 | return -EINVAL; | |
229 | } | |
c66ac9db | 230 | |
065f9716 DC |
231 | ret = rd_build_device_space(rd_dev); |
232 | if (ret < 0) | |
c66ac9db NB |
233 | goto fail; |
234 | ||
0fd97ccf CH |
235 | dev->dev_attrib.hw_block_size = RD_BLOCKSIZE; |
236 | dev->dev_attrib.hw_max_sectors = UINT_MAX; | |
237 | dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH; | |
c66ac9db NB |
238 | |
239 | rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++; | |
c66ac9db | 240 | |
8feb58d0 | 241 | pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of" |
c66ac9db | 242 | " %u pages in %u tables, %lu total bytes\n", |
8feb58d0 | 243 | rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count, |
c66ac9db NB |
244 | rd_dev->sg_table_count, |
245 | (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE)); | |
246 | ||
0fd97ccf | 247 | return 0; |
c66ac9db NB |
248 | |
249 | fail: | |
250 | rd_release_device_space(rd_dev); | |
0fd97ccf | 251 | return ret; |
c66ac9db NB |
252 | } |
253 | ||
0fd97ccf | 254 | static void rd_free_device(struct se_device *dev) |
c66ac9db | 255 | { |
0fd97ccf | 256 | struct rd_dev *rd_dev = RD_DEV(dev); |
c66ac9db NB |
257 | |
258 | rd_release_device_space(rd_dev); | |
259 | kfree(rd_dev); | |
260 | } | |
261 | ||
c66ac9db NB |
262 | static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) |
263 | { | |
c66ac9db | 264 | struct rd_dev_sg_table *sg_table; |
8f67835f MS |
265 | u32 i, sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
266 | sizeof(struct scatterlist)); | |
c66ac9db | 267 | |
8f67835f MS |
268 | i = page / sg_per_table; |
269 | if (i < rd_dev->sg_table_count) { | |
c66ac9db NB |
270 | sg_table = &rd_dev->sg_table_array[i]; |
271 | if ((sg_table->page_start_offset <= page) && | |
272 | (sg_table->page_end_offset >= page)) | |
273 | return sg_table; | |
274 | } | |
275 | ||
6708bb27 | 276 | pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n", |
c66ac9db NB |
277 | page); |
278 | ||
279 | return NULL; | |
280 | } | |
281 | ||
de103c93 CH |
282 | static sense_reason_t |
283 | rd_execute_rw(struct se_cmd *cmd) | |
c66ac9db | 284 | { |
0c2ad7d1 CH |
285 | struct scatterlist *sgl = cmd->t_data_sg; |
286 | u32 sgl_nents = cmd->t_data_nents; | |
287 | enum dma_data_direction data_direction = cmd->data_direction; | |
5787cacd | 288 | struct se_device *se_dev = cmd->se_dev; |
0fd97ccf | 289 | struct rd_dev *dev = RD_DEV(se_dev); |
c66ac9db | 290 | struct rd_dev_sg_table *table; |
65b0c78d SAS |
291 | struct scatterlist *rd_sg; |
292 | struct sg_mapping_iter m; | |
8feb58d0 CH |
293 | u32 rd_offset; |
294 | u32 rd_size; | |
295 | u32 rd_page; | |
65b0c78d | 296 | u32 src_len; |
8feb58d0 | 297 | u64 tmp; |
c66ac9db | 298 | |
52c07423 NB |
299 | if (dev->rd_flags & RDF_NULLIO) { |
300 | target_complete_cmd(cmd, SAM_STAT_GOOD); | |
301 | return 0; | |
302 | } | |
303 | ||
0fd97ccf | 304 | tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
8feb58d0 CH |
305 | rd_offset = do_div(tmp, PAGE_SIZE); |
306 | rd_page = tmp; | |
5787cacd | 307 | rd_size = cmd->data_length; |
8feb58d0 CH |
308 | |
309 | table = rd_get_sg_table(dev, rd_page); | |
6708bb27 | 310 | if (!table) |
de103c93 | 311 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 312 | |
8feb58d0 | 313 | rd_sg = &table->sg_table[rd_page - table->page_start_offset]; |
6708bb27 | 314 | |
65b0c78d | 315 | pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n", |
8feb58d0 | 316 | dev->rd_dev_id, |
5787cacd CH |
317 | data_direction == DMA_FROM_DEVICE ? "Read" : "Write", |
318 | cmd->t_task_lba, rd_size, rd_page, rd_offset); | |
c66ac9db | 319 | |
65b0c78d | 320 | src_len = PAGE_SIZE - rd_offset; |
5787cacd CH |
321 | sg_miter_start(&m, sgl, sgl_nents, |
322 | data_direction == DMA_FROM_DEVICE ? | |
8feb58d0 CH |
323 | SG_MITER_TO_SG : SG_MITER_FROM_SG); |
324 | while (rd_size) { | |
65b0c78d SAS |
325 | u32 len; |
326 | void *rd_addr; | |
c66ac9db | 327 | |
65b0c78d | 328 | sg_miter_next(&m); |
bbf344e5 HR |
329 | if (!(u32)m.length) { |
330 | pr_debug("RD[%u]: invalid sgl %p len %zu\n", | |
331 | dev->rd_dev_id, m.addr, m.length); | |
332 | sg_miter_stop(&m); | |
333 | return TCM_INCORRECT_AMOUNT_OF_DATA; | |
334 | } | |
65b0c78d | 335 | len = min((u32)m.length, src_len); |
bbf344e5 HR |
336 | if (len > rd_size) { |
337 | pr_debug("RD[%u]: size underrun page %d offset %d " | |
338 | "size %d\n", dev->rd_dev_id, | |
339 | rd_page, rd_offset, rd_size); | |
340 | len = rd_size; | |
341 | } | |
65b0c78d | 342 | m.consumed = len; |
c66ac9db | 343 | |
65b0c78d | 344 | rd_addr = sg_virt(rd_sg) + rd_offset; |
6708bb27 | 345 | |
5787cacd | 346 | if (data_direction == DMA_FROM_DEVICE) |
65b0c78d SAS |
347 | memcpy(m.addr, rd_addr, len); |
348 | else | |
349 | memcpy(rd_addr, m.addr, len); | |
c66ac9db | 350 | |
8feb58d0 CH |
351 | rd_size -= len; |
352 | if (!rd_size) | |
c66ac9db NB |
353 | continue; |
354 | ||
65b0c78d SAS |
355 | src_len -= len; |
356 | if (src_len) { | |
357 | rd_offset += len; | |
c66ac9db NB |
358 | continue; |
359 | } | |
6708bb27 | 360 | |
65b0c78d | 361 | /* rd page completed, next one please */ |
8feb58d0 | 362 | rd_page++; |
65b0c78d SAS |
363 | rd_offset = 0; |
364 | src_len = PAGE_SIZE; | |
8feb58d0 | 365 | if (rd_page <= table->page_end_offset) { |
65b0c78d | 366 | rd_sg++; |
c66ac9db NB |
367 | continue; |
368 | } | |
6708bb27 | 369 | |
8feb58d0 | 370 | table = rd_get_sg_table(dev, rd_page); |
65b0c78d SAS |
371 | if (!table) { |
372 | sg_miter_stop(&m); | |
de103c93 | 373 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
65b0c78d | 374 | } |
c66ac9db | 375 | |
65b0c78d SAS |
376 | /* since we increment, the first sg entry is correct */ |
377 | rd_sg = table->sg_table; | |
c66ac9db | 378 | } |
65b0c78d | 379 | sg_miter_stop(&m); |
c66ac9db | 380 | |
5787cacd | 381 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
03e98c9e | 382 | return 0; |
c66ac9db NB |
383 | } |
384 | ||
c66ac9db | 385 | enum { |
52c07423 | 386 | Opt_rd_pages, Opt_rd_nullio, Opt_err |
c66ac9db NB |
387 | }; |
388 | ||
389 | static match_table_t tokens = { | |
390 | {Opt_rd_pages, "rd_pages=%d"}, | |
52c07423 | 391 | {Opt_rd_nullio, "rd_nullio=%d"}, |
c66ac9db NB |
392 | {Opt_err, NULL} |
393 | }; | |
394 | ||
0fd97ccf CH |
395 | static ssize_t rd_set_configfs_dev_params(struct se_device *dev, |
396 | const char *page, ssize_t count) | |
c66ac9db | 397 | { |
0fd97ccf | 398 | struct rd_dev *rd_dev = RD_DEV(dev); |
c66ac9db NB |
399 | char *orig, *ptr, *opts; |
400 | substring_t args[MAX_OPT_ARGS]; | |
401 | int ret = 0, arg, token; | |
402 | ||
403 | opts = kstrdup(page, GFP_KERNEL); | |
404 | if (!opts) | |
405 | return -ENOMEM; | |
406 | ||
407 | orig = opts; | |
408 | ||
90c161b6 | 409 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
410 | if (!*ptr) |
411 | continue; | |
412 | ||
413 | token = match_token(ptr, tokens, args); | |
414 | switch (token) { | |
415 | case Opt_rd_pages: | |
416 | match_int(args, &arg); | |
417 | rd_dev->rd_page_count = arg; | |
6708bb27 | 418 | pr_debug("RAMDISK: Referencing Page" |
c66ac9db NB |
419 | " Count: %u\n", rd_dev->rd_page_count); |
420 | rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT; | |
421 | break; | |
52c07423 NB |
422 | case Opt_rd_nullio: |
423 | match_int(args, &arg); | |
424 | if (arg != 1) | |
425 | break; | |
426 | ||
427 | pr_debug("RAMDISK: Setting NULLIO flag: %d\n", arg); | |
428 | rd_dev->rd_flags |= RDF_NULLIO; | |
429 | break; | |
c66ac9db NB |
430 | default: |
431 | break; | |
432 | } | |
433 | } | |
434 | ||
435 | kfree(orig); | |
436 | return (!ret) ? count : ret; | |
437 | } | |
438 | ||
0fd97ccf | 439 | static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 440 | { |
0fd97ccf | 441 | struct rd_dev *rd_dev = RD_DEV(dev); |
c66ac9db | 442 | |
8feb58d0 CH |
443 | ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n", |
444 | rd_dev->rd_dev_id); | |
c66ac9db | 445 | bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" |
52c07423 NB |
446 | " SG_table_count: %u nullio: %d\n", rd_dev->rd_page_count, |
447 | PAGE_SIZE, rd_dev->sg_table_count, | |
448 | !!(rd_dev->rd_flags & RDF_NULLIO)); | |
c66ac9db NB |
449 | return bl; |
450 | } | |
451 | ||
c66ac9db NB |
452 | static sector_t rd_get_blocks(struct se_device *dev) |
453 | { | |
0fd97ccf CH |
454 | struct rd_dev *rd_dev = RD_DEV(dev); |
455 | ||
c66ac9db | 456 | unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) / |
0fd97ccf | 457 | dev->dev_attrib.block_size) - 1; |
c66ac9db NB |
458 | |
459 | return blocks_long; | |
460 | } | |
461 | ||
9e999a6c | 462 | static struct sbc_ops rd_sbc_ops = { |
0c2ad7d1 CH |
463 | .execute_rw = rd_execute_rw, |
464 | }; | |
465 | ||
de103c93 CH |
466 | static sense_reason_t |
467 | rd_parse_cdb(struct se_cmd *cmd) | |
0c2ad7d1 | 468 | { |
9e999a6c | 469 | return sbc_parse_cdb(cmd, &rd_sbc_ops); |
0c2ad7d1 CH |
470 | } |
471 | ||
c66ac9db NB |
472 | static struct se_subsystem_api rd_mcp_template = { |
473 | .name = "rd_mcp", | |
0fd97ccf CH |
474 | .inquiry_prod = "RAMDISK-MCP", |
475 | .inquiry_rev = RD_MCP_VERSION, | |
c66ac9db NB |
476 | .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV, |
477 | .attach_hba = rd_attach_hba, | |
478 | .detach_hba = rd_detach_hba, | |
0fd97ccf CH |
479 | .alloc_device = rd_alloc_device, |
480 | .configure_device = rd_configure_device, | |
c66ac9db | 481 | .free_device = rd_free_device, |
0c2ad7d1 | 482 | .parse_cdb = rd_parse_cdb, |
c66ac9db NB |
483 | .set_configfs_dev_params = rd_set_configfs_dev_params, |
484 | .show_configfs_dev_params = rd_show_configfs_dev_params, | |
6f23ac8a | 485 | .get_device_type = sbc_get_device_type, |
c66ac9db NB |
486 | .get_blocks = rd_get_blocks, |
487 | }; | |
488 | ||
489 | int __init rd_module_init(void) | |
490 | { | |
491 | int ret; | |
492 | ||
c66ac9db NB |
493 | ret = transport_subsystem_register(&rd_mcp_template); |
494 | if (ret < 0) { | |
c66ac9db NB |
495 | return ret; |
496 | } | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | void rd_module_exit(void) | |
502 | { | |
c66ac9db NB |
503 | transport_subsystem_release(&rd_mcp_template); |
504 | } |