blob: b31a8e3841d795154672cad902ec628bafb59c6f [file] [log] [blame]
Boaz Harrosh95b05a72009-01-25 16:56:47 +02001/*
2 * osd_uld.c - OSD Upper Layer Driver
3 *
4 * A Linux driver module that registers as a SCSI ULD and probes
5 * for OSD type SCSI devices.
6 * It's main function is to export osd devices to in-kernel users like
7 * osdfs and pNFS-objects-LD. It also provides one ioctl for running
8 * in Kernel tests.
9 *
10 * Copyright (C) 2008 Panasas Inc. All rights reserved.
11 *
12 * Authors:
13 * Boaz Harrosh <bharrosh@panasas.com>
14 * Benny Halevy <bhalevy@panasas.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 *
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 * 3. Neither the name of the Panasas company nor the names of its
29 * contributors may be used to endorse or promote products derived
30 * from this software without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
33 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
34 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
35 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
37 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
39 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
40 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
41 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
42 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 */
44
45#include <linux/namei.h>
46#include <linux/cdev.h>
47#include <linux/fs.h>
48#include <linux/module.h>
49#include <linux/device.h>
50#include <linux/idr.h>
51#include <linux/major.h>
Boaz Harrosh021e2232009-05-24 20:05:05 +030052#include <linux/file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090053#include <linux/slab.h>
Boaz Harrosh95b05a72009-01-25 16:56:47 +020054
55#include <scsi/scsi.h>
56#include <scsi/scsi_driver.h>
57#include <scsi/scsi_device.h>
58#include <scsi/scsi_ioctl.h>
59
60#include <scsi/osd_initiator.h>
61#include <scsi/osd_sec.h>
62
63#include "osd_debug.h"
64
65#ifndef TYPE_OSD
66# define TYPE_OSD 0x11
67#endif
68
69#ifndef SCSI_OSD_MAJOR
70# define SCSI_OSD_MAJOR 260
71#endif
72#define SCSI_OSD_MAX_MINOR 64
73
74static const char osd_name[] = "osd";
Boaz Harroshd6ae4332009-11-29 16:25:26 +020075static const char *osd_version_string = "open-osd 0.2.0";
Boaz Harrosh95b05a72009-01-25 16:56:47 +020076
77MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
78MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko");
79MODULE_LICENSE("GPL");
80MODULE_ALIAS_CHARDEV_MAJOR(SCSI_OSD_MAJOR);
81MODULE_ALIAS_SCSI_DEVICE(TYPE_OSD);
82
83struct osd_uld_device {
84 int minor;
Boaz Harroshd6ae4332009-11-29 16:25:26 +020085 struct device class_dev;
Boaz Harrosh95b05a72009-01-25 16:56:47 +020086 struct cdev cdev;
87 struct osd_dev od;
Boaz Harrosh2cdd6412009-11-29 16:26:45 +020088 struct osd_dev_info odi;
Boaz Harrosh95b05a72009-01-25 16:56:47 +020089 struct gendisk *disk;
Boaz Harrosh95b05a72009-01-25 16:56:47 +020090};
91
Boaz Harroshd6ae4332009-11-29 16:25:26 +020092struct osd_dev_handle {
93 struct osd_dev od;
94 struct file *file;
95 struct osd_uld_device *oud;
96} ;
97
98static DEFINE_IDA(osd_minor_ida);
99
100static struct class osd_uld_class = {
101 .owner = THIS_MODULE,
102 .name = "scsi_osd",
103};
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200104
105/*
106 * Char Device operations
107 */
108
109static int osd_uld_open(struct inode *inode, struct file *file)
110{
111 struct osd_uld_device *oud = container_of(inode->i_cdev,
112 struct osd_uld_device, cdev);
113
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200114 get_device(&oud->class_dev);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200115 /* cache osd_uld_device on file handle */
116 file->private_data = oud;
117 OSD_DEBUG("osd_uld_open %p\n", oud);
118 return 0;
119}
120
121static int osd_uld_release(struct inode *inode, struct file *file)
122{
123 struct osd_uld_device *oud = file->private_data;
124
125 OSD_DEBUG("osd_uld_release %p\n", file->private_data);
126 file->private_data = NULL;
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200127 put_device(&oud->class_dev);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200128 return 0;
129}
130
131/* FIXME: Only one vector for now */
132unsigned g_test_ioctl;
133do_test_fn *g_do_test;
134
135int osduld_register_test(unsigned ioctl, do_test_fn *do_test)
136{
137 if (g_test_ioctl)
138 return -EINVAL;
139
140 g_test_ioctl = ioctl;
141 g_do_test = do_test;
142 return 0;
143}
144EXPORT_SYMBOL(osduld_register_test);
145
146void osduld_unregister_test(unsigned ioctl)
147{
148 if (ioctl == g_test_ioctl) {
149 g_test_ioctl = 0;
150 g_do_test = NULL;
151 }
152}
153EXPORT_SYMBOL(osduld_unregister_test);
154
155static do_test_fn *_find_ioctl(unsigned cmd)
156{
157 if (g_test_ioctl == cmd)
158 return g_do_test;
159 else
160 return NULL;
161}
162
163static long osd_uld_ioctl(struct file *file, unsigned int cmd,
164 unsigned long arg)
165{
166 struct osd_uld_device *oud = file->private_data;
167 int ret;
168 do_test_fn *do_test;
169
170 do_test = _find_ioctl(cmd);
171 if (do_test)
172 ret = do_test(&oud->od, cmd, arg);
173 else {
174 OSD_ERR("Unknown ioctl %d: osd_uld_device=%p\n", cmd, oud);
175 ret = -ENOIOCTLCMD;
176 }
177 return ret;
178}
179
180static const struct file_operations osd_fops = {
181 .owner = THIS_MODULE,
182 .open = osd_uld_open,
183 .release = osd_uld_release,
184 .unlocked_ioctl = osd_uld_ioctl,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200185 .llseek = noop_llseek,
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200186};
187
Al Viroe24977d2009-04-02 21:17:03 -0400188struct osd_dev *osduld_path_lookup(const char *name)
Boaz Harroshb799bc72009-01-25 16:58:03 +0200189{
Boaz Harrosh021e2232009-05-24 20:05:05 +0300190 struct osd_uld_device *oud;
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200191 struct osd_dev_handle *odh;
Boaz Harrosh021e2232009-05-24 20:05:05 +0300192 struct file *file;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200193 int error;
194
Al Viroe24977d2009-04-02 21:17:03 -0400195 if (!name || !*name) {
Boaz Harroshb799bc72009-01-25 16:58:03 +0200196 OSD_ERR("Mount with !path || !*path\n");
197 return ERR_PTR(-EINVAL);
198 }
199
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200200 odh = kzalloc(sizeof(*odh), GFP_KERNEL);
201 if (unlikely(!odh))
Boaz Harrosh021e2232009-05-24 20:05:05 +0300202 return ERR_PTR(-ENOMEM);
203
204 file = filp_open(name, O_RDWR, 0);
205 if (IS_ERR(file)) {
206 error = PTR_ERR(file);
207 goto free_od;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200208 }
209
Boaz Harrosh021e2232009-05-24 20:05:05 +0300210 if (file->f_op != &osd_fops){
211 error = -EINVAL;
212 goto close_file;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200213 }
214
Boaz Harrosh021e2232009-05-24 20:05:05 +0300215 oud = file->private_data;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200216
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200217 odh->od = oud->od;
218 odh->file = file;
219 odh->oud = oud;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200220
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200221 return &odh->od;
Boaz Harroshb799bc72009-01-25 16:58:03 +0200222
Boaz Harrosh021e2232009-05-24 20:05:05 +0300223close_file:
224 fput(file);
225free_od:
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200226 kfree(odh);
Boaz Harrosh021e2232009-05-24 20:05:05 +0300227 return ERR_PTR(error);
Boaz Harroshb799bc72009-01-25 16:58:03 +0200228}
229EXPORT_SYMBOL(osduld_path_lookup);
230
Boaz Harrosh2cdd6412009-11-29 16:26:45 +0200231static inline bool _the_same_or_null(const u8 *a1, unsigned a1_len,
232 const u8 *a2, unsigned a2_len)
233{
234 if (!a2_len) /* User string is Empty means don't care */
235 return true;
236
237 if (a1_len != a2_len)
238 return false;
239
240 return 0 == memcmp(a1, a2, a1_len);
241}
242
243struct find_oud_t {
244 const struct osd_dev_info *odi;
245 struct device *dev;
246 struct osd_uld_device *oud;
247} ;
248
249int _mach_odi(struct device *dev, void *find_data)
250{
251 struct osd_uld_device *oud = container_of(dev, struct osd_uld_device,
252 class_dev);
253 struct find_oud_t *fot = find_data;
254 const struct osd_dev_info *odi = fot->odi;
255
256 if (_the_same_or_null(oud->odi.systemid, oud->odi.systemid_len,
257 odi->systemid, odi->systemid_len) &&
258 _the_same_or_null(oud->odi.osdname, oud->odi.osdname_len,
259 odi->osdname, odi->osdname_len)) {
260 OSD_DEBUG("found device sysid_len=%d osdname=%d\n",
261 odi->systemid_len, odi->osdname_len);
262 fot->oud = oud;
263 return 1;
264 } else {
265 return 0;
266 }
267}
268
269/* osduld_info_lookup - Loop through all devices, return the requested osd_dev.
270 *
271 * if @odi->systemid_len and/or @odi->osdname_len are zero, they act as a don't
272 * care. .e.g if they're both zero /dev/osd0 is returned.
273 */
274struct osd_dev *osduld_info_lookup(const struct osd_dev_info *odi)
275{
276 struct find_oud_t find = {.odi = odi};
277
278 find.dev = class_find_device(&osd_uld_class, NULL, &find, _mach_odi);
279 if (likely(find.dev)) {
280 struct osd_dev_handle *odh = kzalloc(sizeof(*odh), GFP_KERNEL);
281
282 if (unlikely(!odh)) {
283 put_device(find.dev);
284 return ERR_PTR(-ENOMEM);
285 }
286
287 odh->od = find.oud->od;
288 odh->oud = find.oud;
289
290 return &odh->od;
291 }
292
293 return ERR_PTR(-ENODEV);
294}
295EXPORT_SYMBOL(osduld_info_lookup);
296
Boaz Harroshb799bc72009-01-25 16:58:03 +0200297void osduld_put_device(struct osd_dev *od)
298{
Boaz Harrosh021e2232009-05-24 20:05:05 +0300299 if (od && !IS_ERR(od)) {
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200300 struct osd_dev_handle *odh =
301 container_of(od, struct osd_dev_handle, od);
302 struct osd_uld_device *oud = odh->oud;
Boaz Harrosh021e2232009-05-24 20:05:05 +0300303
304 BUG_ON(od->scsi_device != oud->od.scsi_device);
305
Boaz Harrosh89f5e1f2009-11-16 20:44:02 +0200306 /* If scsi has released the device (logout), and exofs has last
307 * reference on oud it will be freed by above osd_uld_release
308 * within fput below. But this will oops in cdev_release which
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200309 * is called after the fops->release. A get_/put_ pair makes
Boaz Harrosh89f5e1f2009-11-16 20:44:02 +0200310 * sure we have a cdev for the duration of fput
311 */
Boaz Harrosh2cdd6412009-11-29 16:26:45 +0200312 if (odh->file) {
313 get_device(&oud->class_dev);
314 fput(odh->file);
315 }
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200316 put_device(&oud->class_dev);
317 kfree(odh);
Boaz Harroshb799bc72009-01-25 16:58:03 +0200318 }
319}
320EXPORT_SYMBOL(osduld_put_device);
321
Boaz Harrosh2cdd6412009-11-29 16:26:45 +0200322const struct osd_dev_info *osduld_device_info(struct osd_dev *od)
323{
324 struct osd_dev_handle *odh =
325 container_of(od, struct osd_dev_handle, od);
326 return &odh->oud->odi;
327}
328EXPORT_SYMBOL(osduld_device_info);
329
330bool osduld_device_same(struct osd_dev *od, const struct osd_dev_info *odi)
331{
332 struct osd_dev_handle *odh =
333 container_of(od, struct osd_dev_handle, od);
334 struct osd_uld_device *oud = odh->oud;
335
336 return (oud->odi.systemid_len == odi->systemid_len) &&
337 _the_same_or_null(oud->odi.systemid, oud->odi.systemid_len,
338 odi->systemid, odi->systemid_len) &&
339 (oud->odi.osdname_len == odi->osdname_len) &&
340 _the_same_or_null(oud->odi.osdname, oud->odi.osdname_len,
341 odi->osdname, odi->osdname_len);
342}
343EXPORT_SYMBOL(osduld_device_same);
344
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200345/*
346 * Scsi Device operations
347 */
348
349static int __detect_osd(struct osd_uld_device *oud)
350{
351 struct scsi_device *scsi_device = oud->od.scsi_device;
Boaz Harrosh1b9dce92009-01-25 17:13:38 +0200352 char caps[OSD_CAP_LEN];
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200353 int error;
354
355 /* sending a test_unit_ready as first command seems to be needed
356 * by some targets
357 */
358 OSD_DEBUG("start scsi_test_unit_ready %p %p %p\n",
359 oud, scsi_device, scsi_device->request_queue);
360 error = scsi_test_unit_ready(scsi_device, 10*HZ, 5, NULL);
361 if (error)
362 OSD_ERR("warning: scsi_test_unit_ready failed\n");
363
Boaz Harrosh1b9dce92009-01-25 17:13:38 +0200364 osd_sec_init_nosec_doall_caps(caps, &osd_root_object, false, true);
Boaz Harrosh2cdd6412009-11-29 16:26:45 +0200365 if (osd_auto_detect_ver(&oud->od, caps, &oud->odi))
Boaz Harrosh1b9dce92009-01-25 17:13:38 +0200366 return -ENODEV;
367
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200368 return 0;
369}
370
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200371static void __remove(struct device *dev)
372{
373 struct osd_uld_device *oud = container_of(dev, struct osd_uld_device,
374 class_dev);
375 struct scsi_device *scsi_device = oud->od.scsi_device;
376
Boaz Harrosh2cdd6412009-11-29 16:26:45 +0200377 kfree(oud->odi.osdname);
378
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200379 if (oud->cdev.owner)
380 cdev_del(&oud->cdev);
381
382 osd_dev_fini(&oud->od);
383 scsi_device_put(scsi_device);
384
385 OSD_INFO("osd_remove %s\n",
386 oud->disk ? oud->disk->disk_name : NULL);
387
388 if (oud->disk)
389 put_disk(oud->disk);
390 ida_remove(&osd_minor_ida, oud->minor);
391
392 kfree(oud);
393}
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200394
395static int osd_probe(struct device *dev)
396{
397 struct scsi_device *scsi_device = to_scsi_device(dev);
398 struct gendisk *disk;
399 struct osd_uld_device *oud;
400 int minor;
401 int error;
402
403 if (scsi_device->type != TYPE_OSD)
404 return -ENODEV;
405
406 do {
407 if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL))
408 return -ENODEV;
409
410 error = ida_get_new(&osd_minor_ida, &minor);
411 } while (error == -EAGAIN);
412
413 if (error)
414 return error;
415 if (minor >= SCSI_OSD_MAX_MINOR) {
416 error = -EBUSY;
417 goto err_retract_minor;
418 }
419
420 error = -ENOMEM;
421 oud = kzalloc(sizeof(*oud), GFP_KERNEL);
422 if (NULL == oud)
423 goto err_retract_minor;
424
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200425 dev_set_drvdata(dev, oud);
426 oud->minor = minor;
427
428 /* allocate a disk and set it up */
429 /* FIXME: do we need this since sg has already done that */
430 disk = alloc_disk(1);
431 if (!disk) {
432 OSD_ERR("alloc_disk failed\n");
433 goto err_free_osd;
434 }
435 disk->major = SCSI_OSD_MAJOR;
436 disk->first_minor = oud->minor;
437 sprintf(disk->disk_name, "osd%d", oud->minor);
438 oud->disk = disk;
439
440 /* hold one more reference to the scsi_device that will get released
441 * in __release, in case a logout is happening while fs is mounted
442 */
443 scsi_device_get(scsi_device);
444 osd_dev_init(&oud->od, scsi_device);
445
446 /* Detect the OSD Version */
447 error = __detect_osd(oud);
448 if (error) {
449 OSD_ERR("osd detection failed, non-compatible OSD device\n");
450 goto err_put_disk;
451 }
452
453 /* init the char-device for communication with user-mode */
454 cdev_init(&oud->cdev, &osd_fops);
455 oud->cdev.owner = THIS_MODULE;
456 error = cdev_add(&oud->cdev,
457 MKDEV(SCSI_OSD_MAJOR, oud->minor), 1);
458 if (error) {
459 OSD_ERR("cdev_add failed\n");
460 goto err_put_disk;
461 }
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200462
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200463 /* class device member */
464 oud->class_dev.devt = oud->cdev.dev;
465 oud->class_dev.class = &osd_uld_class;
466 oud->class_dev.parent = dev;
467 oud->class_dev.release = __remove;
468 error = dev_set_name(&oud->class_dev, disk->disk_name);
469 if (error) {
470 OSD_ERR("dev_set_name failed => %d\n", error);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200471 goto err_put_cdev;
472 }
473
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200474 error = device_register(&oud->class_dev);
475 if (error) {
476 OSD_ERR("device_register failed => %d\n", error);
477 goto err_put_cdev;
478 }
479
480 get_device(&oud->class_dev);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200481
482 OSD_INFO("osd_probe %s\n", disk->disk_name);
483 return 0;
484
485err_put_cdev:
486 cdev_del(&oud->cdev);
487err_put_disk:
488 scsi_device_put(scsi_device);
489 put_disk(disk);
490err_free_osd:
491 dev_set_drvdata(dev, NULL);
492 kfree(oud);
493err_retract_minor:
494 ida_remove(&osd_minor_ida, minor);
495 return error;
496}
497
498static int osd_remove(struct device *dev)
499{
500 struct scsi_device *scsi_device = to_scsi_device(dev);
501 struct osd_uld_device *oud = dev_get_drvdata(dev);
502
503 if (!oud || (oud->od.scsi_device != scsi_device)) {
504 OSD_ERR("Half cooked osd-device %p,%p || %p!=%p",
505 dev, oud, oud ? oud->od.scsi_device : NULL,
506 scsi_device);
507 }
508
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200509 device_unregister(&oud->class_dev);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200510
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200511 put_device(&oud->class_dev);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200512 return 0;
513}
514
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200515/*
516 * Global driver and scsi registration
517 */
518
519static struct scsi_driver osd_driver = {
520 .owner = THIS_MODULE,
521 .gendrv = {
522 .name = osd_name,
523 .probe = osd_probe,
524 .remove = osd_remove,
525 }
526};
527
528static int __init osd_uld_init(void)
529{
530 int err;
531
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200532 err = class_register(&osd_uld_class);
533 if (err) {
534 OSD_ERR("Unable to register sysfs class => %d\n", err);
535 return err;
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200536 }
537
538 err = register_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0),
539 SCSI_OSD_MAX_MINOR, osd_name);
540 if (err) {
541 OSD_ERR("Unable to register major %d for osd ULD => %d\n",
542 SCSI_OSD_MAJOR, err);
543 goto err_out;
544 }
545
546 err = scsi_register_driver(&osd_driver.gendrv);
547 if (err) {
548 OSD_ERR("scsi_register_driver failed => %d\n", err);
549 goto err_out_chrdev;
550 }
551
552 OSD_INFO("LOADED %s\n", osd_version_string);
553 return 0;
554
555err_out_chrdev:
556 unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR);
557err_out:
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200558 class_unregister(&osd_uld_class);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200559 return err;
560}
561
562static void __exit osd_uld_exit(void)
563{
564 scsi_unregister_driver(&osd_driver.gendrv);
565 unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR);
Boaz Harroshd6ae4332009-11-29 16:25:26 +0200566 class_unregister(&osd_uld_class);
Boaz Harrosh95b05a72009-01-25 16:56:47 +0200567 OSD_INFO("UNLOADED %s\n", osd_version_string);
568}
569
570module_init(osd_uld_init);
571module_exit(osd_uld_exit);