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Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_rd.c | |
3 | * | |
4 | * This file contains the Storage Engine <-> Ramdisk transport | |
5 | * specific functions. | |
6 | * | |
7 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. | |
8 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
9 | * Copyright (c) 2007-2010 Rising Tide Systems | |
10 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
11 | * | |
12 | * Nicholas A. Bellinger <nab@kernel.org> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
27 | * | |
28 | ******************************************************************************/ | |
29 | ||
c66ac9db NB |
30 | #include <linux/string.h> |
31 | #include <linux/parser.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/blkdev.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <scsi/scsi.h> |
37 | #include <scsi/scsi_host.h> | |
38 | ||
39 | #include <target/target_core_base.h> | |
c4795fb2 | 40 | #include <target/target_core_backend.h> |
c66ac9db NB |
41 | |
42 | #include "target_core_rd.h" | |
43 | ||
c66ac9db NB |
44 | static struct se_subsystem_api rd_mcp_template; |
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 NB |
141 | } |
142 | total_sg_needed = rd_dev->rd_page_count; | |
143 | ||
144 | sg_tables = (total_sg_needed / max_sg_per_table) + 1; | |
145 | ||
146 | sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL); | |
6708bb27 AG |
147 | if (!sg_table) { |
148 | pr_err("Unable to allocate memory for Ramdisk" | |
c66ac9db | 149 | " scatterlist tables\n"); |
065f9716 | 150 | return -ENOMEM; |
c66ac9db NB |
151 | } |
152 | ||
153 | rd_dev->sg_table_array = sg_table; | |
154 | rd_dev->sg_table_count = sg_tables; | |
155 | ||
156 | while (total_sg_needed) { | |
157 | sg_per_table = (total_sg_needed > max_sg_per_table) ? | |
158 | max_sg_per_table : total_sg_needed; | |
159 | ||
160 | sg = kzalloc(sg_per_table * sizeof(struct scatterlist), | |
161 | GFP_KERNEL); | |
6708bb27 AG |
162 | if (!sg) { |
163 | pr_err("Unable to allocate scatterlist array" | |
c66ac9db | 164 | " for struct rd_dev\n"); |
065f9716 | 165 | return -ENOMEM; |
c66ac9db NB |
166 | } |
167 | ||
6708bb27 | 168 | sg_init_table(sg, sg_per_table); |
c66ac9db NB |
169 | |
170 | sg_table[i].sg_table = sg; | |
171 | sg_table[i].rd_sg_count = sg_per_table; | |
172 | sg_table[i].page_start_offset = page_offset; | |
173 | sg_table[i++].page_end_offset = (page_offset + sg_per_table) | |
174 | - 1; | |
175 | ||
176 | for (j = 0; j < sg_per_table; j++) { | |
177 | pg = alloc_pages(GFP_KERNEL, 0); | |
6708bb27 AG |
178 | if (!pg) { |
179 | pr_err("Unable to allocate scatterlist" | |
c66ac9db | 180 | " pages for struct rd_dev_sg_table\n"); |
065f9716 | 181 | return -ENOMEM; |
c66ac9db NB |
182 | } |
183 | sg_assign_page(&sg[j], pg); | |
184 | sg[j].length = PAGE_SIZE; | |
185 | } | |
186 | ||
187 | page_offset += sg_per_table; | |
188 | total_sg_needed -= sg_per_table; | |
189 | } | |
190 | ||
6708bb27 | 191 | pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of" |
c66ac9db NB |
192 | " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id, |
193 | rd_dev->rd_dev_id, rd_dev->rd_page_count, | |
194 | rd_dev->sg_table_count); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
8feb58d0 | 199 | static void *rd_allocate_virtdevice(struct se_hba *hba, const char *name) |
c66ac9db NB |
200 | { |
201 | struct rd_dev *rd_dev; | |
202 | struct rd_host *rd_host = hba->hba_ptr; | |
203 | ||
204 | rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL); | |
6708bb27 AG |
205 | if (!rd_dev) { |
206 | pr_err("Unable to allocate memory for struct rd_dev\n"); | |
c66ac9db NB |
207 | return NULL; |
208 | } | |
209 | ||
210 | rd_dev->rd_host = rd_host; | |
c66ac9db NB |
211 | |
212 | return rd_dev; | |
213 | } | |
214 | ||
8feb58d0 CH |
215 | static struct se_device *rd_create_virtdevice(struct se_hba *hba, |
216 | struct se_subsystem_dev *se_dev, void *p) | |
c66ac9db NB |
217 | { |
218 | struct se_device *dev; | |
219 | struct se_dev_limits dev_limits; | |
220 | struct rd_dev *rd_dev = p; | |
221 | struct rd_host *rd_host = hba->hba_ptr; | |
065f9716 | 222 | int dev_flags = 0, ret; |
c66ac9db NB |
223 | char prod[16], rev[4]; |
224 | ||
225 | memset(&dev_limits, 0, sizeof(struct se_dev_limits)); | |
226 | ||
065f9716 DC |
227 | ret = rd_build_device_space(rd_dev); |
228 | if (ret < 0) | |
c66ac9db NB |
229 | goto fail; |
230 | ||
8feb58d0 CH |
231 | snprintf(prod, 16, "RAMDISK-MCP"); |
232 | snprintf(rev, 4, "%s", RD_MCP_VERSION); | |
c66ac9db NB |
233 | |
234 | dev_limits.limits.logical_block_size = RD_BLOCKSIZE; | |
83799efb CH |
235 | dev_limits.limits.max_hw_sectors = UINT_MAX; |
236 | dev_limits.limits.max_sectors = UINT_MAX; | |
c66ac9db NB |
237 | dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH; |
238 | dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH; | |
239 | ||
240 | dev = transport_add_device_to_core_hba(hba, | |
5951146d | 241 | &rd_mcp_template, se_dev, dev_flags, rd_dev, |
c66ac9db | 242 | &dev_limits, prod, rev); |
6708bb27 | 243 | if (!dev) |
c66ac9db NB |
244 | goto fail; |
245 | ||
246 | rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++; | |
c66ac9db | 247 | |
8feb58d0 | 248 | pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of" |
c66ac9db | 249 | " %u pages in %u tables, %lu total bytes\n", |
8feb58d0 | 250 | rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count, |
c66ac9db NB |
251 | rd_dev->sg_table_count, |
252 | (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE)); | |
253 | ||
254 | return dev; | |
255 | ||
256 | fail: | |
257 | rd_release_device_space(rd_dev); | |
613640e4 | 258 | return ERR_PTR(ret); |
c66ac9db NB |
259 | } |
260 | ||
c66ac9db NB |
261 | static void rd_free_device(void *p) |
262 | { | |
263 | struct rd_dev *rd_dev = p; | |
264 | ||
265 | rd_release_device_space(rd_dev); | |
266 | kfree(rd_dev); | |
267 | } | |
268 | ||
c66ac9db NB |
269 | static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) |
270 | { | |
271 | u32 i; | |
272 | struct rd_dev_sg_table *sg_table; | |
273 | ||
274 | for (i = 0; i < rd_dev->sg_table_count; i++) { | |
275 | sg_table = &rd_dev->sg_table_array[i]; | |
276 | if ((sg_table->page_start_offset <= page) && | |
277 | (sg_table->page_end_offset >= page)) | |
278 | return sg_table; | |
279 | } | |
280 | ||
6708bb27 | 281 | pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n", |
c66ac9db NB |
282 | page); |
283 | ||
284 | return NULL; | |
285 | } | |
286 | ||
0c2ad7d1 | 287 | static int rd_execute_rw(struct se_cmd *cmd) |
c66ac9db | 288 | { |
0c2ad7d1 CH |
289 | struct scatterlist *sgl = cmd->t_data_sg; |
290 | u32 sgl_nents = cmd->t_data_nents; | |
291 | enum dma_data_direction data_direction = cmd->data_direction; | |
5787cacd | 292 | struct se_device *se_dev = cmd->se_dev; |
8feb58d0 | 293 | struct rd_dev *dev = se_dev->dev_ptr; |
c66ac9db | 294 | struct rd_dev_sg_table *table; |
65b0c78d SAS |
295 | struct scatterlist *rd_sg; |
296 | struct sg_mapping_iter m; | |
8feb58d0 CH |
297 | u32 rd_offset; |
298 | u32 rd_size; | |
299 | u32 rd_page; | |
65b0c78d | 300 | u32 src_len; |
8feb58d0 | 301 | u64 tmp; |
c66ac9db | 302 | |
5787cacd | 303 | tmp = cmd->t_task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size; |
8feb58d0 CH |
304 | rd_offset = do_div(tmp, PAGE_SIZE); |
305 | rd_page = tmp; | |
5787cacd | 306 | rd_size = cmd->data_length; |
8feb58d0 CH |
307 | |
308 | table = rd_get_sg_table(dev, rd_page); | |
6708bb27 | 309 | if (!table) |
e3d6f909 | 310 | return -EINVAL; |
c66ac9db | 311 | |
8feb58d0 | 312 | rd_sg = &table->sg_table[rd_page - table->page_start_offset]; |
6708bb27 | 313 | |
65b0c78d | 314 | pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n", |
8feb58d0 | 315 | dev->rd_dev_id, |
5787cacd CH |
316 | data_direction == DMA_FROM_DEVICE ? "Read" : "Write", |
317 | cmd->t_task_lba, rd_size, rd_page, rd_offset); | |
c66ac9db | 318 | |
65b0c78d | 319 | src_len = PAGE_SIZE - rd_offset; |
5787cacd CH |
320 | sg_miter_start(&m, sgl, sgl_nents, |
321 | data_direction == DMA_FROM_DEVICE ? | |
8feb58d0 CH |
322 | SG_MITER_TO_SG : SG_MITER_FROM_SG); |
323 | while (rd_size) { | |
65b0c78d SAS |
324 | u32 len; |
325 | void *rd_addr; | |
c66ac9db | 326 | |
65b0c78d SAS |
327 | sg_miter_next(&m); |
328 | len = min((u32)m.length, src_len); | |
329 | m.consumed = len; | |
c66ac9db | 330 | |
65b0c78d | 331 | rd_addr = sg_virt(rd_sg) + rd_offset; |
6708bb27 | 332 | |
5787cacd | 333 | if (data_direction == DMA_FROM_DEVICE) |
65b0c78d SAS |
334 | memcpy(m.addr, rd_addr, len); |
335 | else | |
336 | memcpy(rd_addr, m.addr, len); | |
c66ac9db | 337 | |
8feb58d0 CH |
338 | rd_size -= len; |
339 | if (!rd_size) | |
c66ac9db NB |
340 | continue; |
341 | ||
65b0c78d SAS |
342 | src_len -= len; |
343 | if (src_len) { | |
344 | rd_offset += len; | |
c66ac9db NB |
345 | continue; |
346 | } | |
6708bb27 | 347 | |
65b0c78d | 348 | /* rd page completed, next one please */ |
8feb58d0 | 349 | rd_page++; |
65b0c78d SAS |
350 | rd_offset = 0; |
351 | src_len = PAGE_SIZE; | |
8feb58d0 | 352 | if (rd_page <= table->page_end_offset) { |
65b0c78d | 353 | rd_sg++; |
c66ac9db NB |
354 | continue; |
355 | } | |
6708bb27 | 356 | |
8feb58d0 | 357 | table = rd_get_sg_table(dev, rd_page); |
65b0c78d SAS |
358 | if (!table) { |
359 | sg_miter_stop(&m); | |
e3d6f909 | 360 | return -EINVAL; |
65b0c78d | 361 | } |
c66ac9db | 362 | |
65b0c78d SAS |
363 | /* since we increment, the first sg entry is correct */ |
364 | rd_sg = table->sg_table; | |
c66ac9db | 365 | } |
65b0c78d | 366 | sg_miter_stop(&m); |
c66ac9db | 367 | |
5787cacd | 368 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
03e98c9e | 369 | return 0; |
c66ac9db NB |
370 | } |
371 | ||
c66ac9db NB |
372 | enum { |
373 | Opt_rd_pages, Opt_err | |
374 | }; | |
375 | ||
376 | static match_table_t tokens = { | |
377 | {Opt_rd_pages, "rd_pages=%d"}, | |
378 | {Opt_err, NULL} | |
379 | }; | |
380 | ||
381 | static ssize_t rd_set_configfs_dev_params( | |
382 | struct se_hba *hba, | |
383 | struct se_subsystem_dev *se_dev, | |
384 | const char *page, | |
385 | ssize_t count) | |
386 | { | |
387 | struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; | |
388 | char *orig, *ptr, *opts; | |
389 | substring_t args[MAX_OPT_ARGS]; | |
390 | int ret = 0, arg, token; | |
391 | ||
392 | opts = kstrdup(page, GFP_KERNEL); | |
393 | if (!opts) | |
394 | return -ENOMEM; | |
395 | ||
396 | orig = opts; | |
397 | ||
90c161b6 | 398 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
399 | if (!*ptr) |
400 | continue; | |
401 | ||
402 | token = match_token(ptr, tokens, args); | |
403 | switch (token) { | |
404 | case Opt_rd_pages: | |
405 | match_int(args, &arg); | |
406 | rd_dev->rd_page_count = arg; | |
6708bb27 | 407 | pr_debug("RAMDISK: Referencing Page" |
c66ac9db NB |
408 | " Count: %u\n", rd_dev->rd_page_count); |
409 | rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT; | |
410 | break; | |
411 | default: | |
412 | break; | |
413 | } | |
414 | } | |
415 | ||
416 | kfree(orig); | |
417 | return (!ret) ? count : ret; | |
418 | } | |
419 | ||
420 | static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev) | |
421 | { | |
422 | struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; | |
423 | ||
424 | if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) { | |
6708bb27 | 425 | pr_debug("Missing rd_pages= parameter\n"); |
e3d6f909 | 426 | return -EINVAL; |
c66ac9db NB |
427 | } |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
432 | static ssize_t rd_show_configfs_dev_params( | |
433 | struct se_hba *hba, | |
434 | struct se_subsystem_dev *se_dev, | |
435 | char *b) | |
436 | { | |
437 | struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; | |
8feb58d0 CH |
438 | ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n", |
439 | rd_dev->rd_dev_id); | |
c66ac9db NB |
440 | bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" |
441 | " SG_table_count: %u\n", rd_dev->rd_page_count, | |
442 | PAGE_SIZE, rd_dev->sg_table_count); | |
443 | return bl; | |
444 | } | |
445 | ||
c66ac9db NB |
446 | static u32 rd_get_device_rev(struct se_device *dev) |
447 | { | |
448 | return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ | |
449 | } | |
450 | ||
451 | static u32 rd_get_device_type(struct se_device *dev) | |
452 | { | |
453 | return TYPE_DISK; | |
454 | } | |
455 | ||
456 | static sector_t rd_get_blocks(struct se_device *dev) | |
457 | { | |
458 | struct rd_dev *rd_dev = dev->dev_ptr; | |
459 | unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) / | |
e3d6f909 | 460 | dev->se_sub_dev->se_dev_attrib.block_size) - 1; |
c66ac9db NB |
461 | |
462 | return blocks_long; | |
463 | } | |
464 | ||
0c2ad7d1 CH |
465 | static struct spc_ops rd_spc_ops = { |
466 | .execute_rw = rd_execute_rw, | |
467 | }; | |
468 | ||
469 | static int rd_parse_cdb(struct se_cmd *cmd) | |
470 | { | |
471 | return sbc_parse_cdb(cmd, &rd_spc_ops); | |
472 | } | |
473 | ||
c66ac9db NB |
474 | static struct se_subsystem_api rd_mcp_template = { |
475 | .name = "rd_mcp", | |
476 | .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV, | |
477 | .attach_hba = rd_attach_hba, | |
478 | .detach_hba = rd_detach_hba, | |
8feb58d0 CH |
479 | .allocate_virtdevice = rd_allocate_virtdevice, |
480 | .create_virtdevice = rd_create_virtdevice, | |
c66ac9db | 481 | .free_device = rd_free_device, |
0c2ad7d1 | 482 | .parse_cdb = rd_parse_cdb, |
c66ac9db NB |
483 | .check_configfs_dev_params = rd_check_configfs_dev_params, |
484 | .set_configfs_dev_params = rd_set_configfs_dev_params, | |
485 | .show_configfs_dev_params = rd_show_configfs_dev_params, | |
c66ac9db NB |
486 | .get_device_rev = rd_get_device_rev, |
487 | .get_device_type = rd_get_device_type, | |
488 | .get_blocks = rd_get_blocks, | |
489 | }; | |
490 | ||
491 | int __init rd_module_init(void) | |
492 | { | |
493 | int ret; | |
494 | ||
c66ac9db NB |
495 | ret = transport_subsystem_register(&rd_mcp_template); |
496 | if (ret < 0) { | |
c66ac9db NB |
497 | return ret; |
498 | } | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | void rd_module_exit(void) | |
504 | { | |
c66ac9db NB |
505 | transport_subsystem_release(&rd_mcp_template); |
506 | } |