Commit | Line | Data |
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95b05a7d BH |
1 | /* |
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> | |
021e2230 | 52 | #include <linux/file.h> |
5a0e3ad6 | 53 | #include <linux/slab.h> |
95b05a7d BH |
54 | |
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 | |
41f8ad76 | 72 | #define SCSI_OSD_MAX_MINOR MINORMASK |
95b05a7d BH |
73 | |
74 | static const char osd_name[] = "osd"; | |
41f8ad76 | 75 | static const char *osd_version_string = "open-osd 0.2.1"; |
95b05a7d BH |
76 | |
77 | MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>"); | |
78 | MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko"); | |
79 | MODULE_LICENSE("GPL"); | |
80 | MODULE_ALIAS_CHARDEV_MAJOR(SCSI_OSD_MAJOR); | |
81 | MODULE_ALIAS_SCSI_DEVICE(TYPE_OSD); | |
82 | ||
83 | struct osd_uld_device { | |
84 | int minor; | |
d6ae4333 | 85 | struct device class_dev; |
95b05a7d BH |
86 | struct cdev cdev; |
87 | struct osd_dev od; | |
2cdd6410 | 88 | struct osd_dev_info odi; |
95b05a7d | 89 | struct gendisk *disk; |
95b05a7d BH |
90 | }; |
91 | ||
d6ae4333 BH |
92 | struct osd_dev_handle { |
93 | struct osd_dev od; | |
94 | struct file *file; | |
95 | struct osd_uld_device *oud; | |
96 | } ; | |
97 | ||
98 | static DEFINE_IDA(osd_minor_ida); | |
99 | ||
51976a8c BH |
100 | /* |
101 | * scsi sysfs attribute operations | |
102 | */ | |
103 | static ssize_t osdname_show(struct device *dev, struct device_attribute *attr, | |
104 | char *buf) | |
105 | { | |
106 | struct osd_uld_device *ould = container_of(dev, struct osd_uld_device, | |
107 | class_dev); | |
108 | return sprintf(buf, "%s\n", ould->odi.osdname); | |
109 | } | |
110 | ||
111 | static ssize_t systemid_show(struct device *dev, struct device_attribute *attr, | |
112 | char *buf) | |
113 | { | |
114 | struct osd_uld_device *ould = container_of(dev, struct osd_uld_device, | |
115 | class_dev); | |
116 | ||
117 | memcpy(buf, ould->odi.systemid, ould->odi.systemid_len); | |
118 | return ould->odi.systemid_len; | |
119 | } | |
120 | ||
121 | static struct device_attribute osd_uld_attrs[] = { | |
122 | __ATTR(osdname, S_IRUGO, osdname_show, NULL), | |
123 | __ATTR(systemid, S_IRUGO, systemid_show, NULL), | |
124 | __ATTR_NULL, | |
125 | }; | |
126 | ||
d6ae4333 BH |
127 | static struct class osd_uld_class = { |
128 | .owner = THIS_MODULE, | |
129 | .name = "scsi_osd", | |
51976a8c | 130 | .dev_attrs = osd_uld_attrs, |
d6ae4333 | 131 | }; |
95b05a7d BH |
132 | |
133 | /* | |
134 | * Char Device operations | |
135 | */ | |
136 | ||
137 | static int osd_uld_open(struct inode *inode, struct file *file) | |
138 | { | |
139 | struct osd_uld_device *oud = container_of(inode->i_cdev, | |
140 | struct osd_uld_device, cdev); | |
141 | ||
d6ae4333 | 142 | get_device(&oud->class_dev); |
95b05a7d BH |
143 | /* cache osd_uld_device on file handle */ |
144 | file->private_data = oud; | |
145 | OSD_DEBUG("osd_uld_open %p\n", oud); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int osd_uld_release(struct inode *inode, struct file *file) | |
150 | { | |
151 | struct osd_uld_device *oud = file->private_data; | |
152 | ||
153 | OSD_DEBUG("osd_uld_release %p\n", file->private_data); | |
154 | file->private_data = NULL; | |
d6ae4333 | 155 | put_device(&oud->class_dev); |
95b05a7d BH |
156 | return 0; |
157 | } | |
158 | ||
159 | /* FIXME: Only one vector for now */ | |
160 | unsigned g_test_ioctl; | |
161 | do_test_fn *g_do_test; | |
162 | ||
163 | int osduld_register_test(unsigned ioctl, do_test_fn *do_test) | |
164 | { | |
165 | if (g_test_ioctl) | |
166 | return -EINVAL; | |
167 | ||
168 | g_test_ioctl = ioctl; | |
169 | g_do_test = do_test; | |
170 | return 0; | |
171 | } | |
172 | EXPORT_SYMBOL(osduld_register_test); | |
173 | ||
174 | void osduld_unregister_test(unsigned ioctl) | |
175 | { | |
176 | if (ioctl == g_test_ioctl) { | |
177 | g_test_ioctl = 0; | |
178 | g_do_test = NULL; | |
179 | } | |
180 | } | |
181 | EXPORT_SYMBOL(osduld_unregister_test); | |
182 | ||
183 | static do_test_fn *_find_ioctl(unsigned cmd) | |
184 | { | |
185 | if (g_test_ioctl == cmd) | |
186 | return g_do_test; | |
187 | else | |
188 | return NULL; | |
189 | } | |
190 | ||
191 | static long osd_uld_ioctl(struct file *file, unsigned int cmd, | |
192 | unsigned long arg) | |
193 | { | |
194 | struct osd_uld_device *oud = file->private_data; | |
195 | int ret; | |
196 | do_test_fn *do_test; | |
197 | ||
198 | do_test = _find_ioctl(cmd); | |
199 | if (do_test) | |
200 | ret = do_test(&oud->od, cmd, arg); | |
201 | else { | |
202 | OSD_ERR("Unknown ioctl %d: osd_uld_device=%p\n", cmd, oud); | |
203 | ret = -ENOIOCTLCMD; | |
204 | } | |
205 | return ret; | |
206 | } | |
207 | ||
208 | static const struct file_operations osd_fops = { | |
209 | .owner = THIS_MODULE, | |
210 | .open = osd_uld_open, | |
211 | .release = osd_uld_release, | |
212 | .unlocked_ioctl = osd_uld_ioctl, | |
6038f373 | 213 | .llseek = noop_llseek, |
95b05a7d BH |
214 | }; |
215 | ||
e24977d4 | 216 | struct osd_dev *osduld_path_lookup(const char *name) |
b799bc7d | 217 | { |
021e2230 | 218 | struct osd_uld_device *oud; |
d6ae4333 | 219 | struct osd_dev_handle *odh; |
021e2230 | 220 | struct file *file; |
b799bc7d BH |
221 | int error; |
222 | ||
e24977d4 | 223 | if (!name || !*name) { |
b799bc7d BH |
224 | OSD_ERR("Mount with !path || !*path\n"); |
225 | return ERR_PTR(-EINVAL); | |
226 | } | |
227 | ||
d6ae4333 BH |
228 | odh = kzalloc(sizeof(*odh), GFP_KERNEL); |
229 | if (unlikely(!odh)) | |
021e2230 | 230 | return ERR_PTR(-ENOMEM); |
b799bc7d | 231 | |
021e2230 BH |
232 | file = filp_open(name, O_RDWR, 0); |
233 | if (IS_ERR(file)) { | |
234 | error = PTR_ERR(file); | |
235 | goto free_od; | |
b799bc7d BH |
236 | } |
237 | ||
021e2230 BH |
238 | if (file->f_op != &osd_fops){ |
239 | error = -EINVAL; | |
240 | goto close_file; | |
b799bc7d BH |
241 | } |
242 | ||
021e2230 | 243 | oud = file->private_data; |
b799bc7d | 244 | |
d6ae4333 BH |
245 | odh->od = oud->od; |
246 | odh->file = file; | |
247 | odh->oud = oud; | |
b799bc7d | 248 | |
d6ae4333 | 249 | return &odh->od; |
b799bc7d | 250 | |
021e2230 BH |
251 | close_file: |
252 | fput(file); | |
253 | free_od: | |
d6ae4333 | 254 | kfree(odh); |
021e2230 | 255 | return ERR_PTR(error); |
b799bc7d BH |
256 | } |
257 | EXPORT_SYMBOL(osduld_path_lookup); | |
258 | ||
2cdd6410 BH |
259 | static inline bool _the_same_or_null(const u8 *a1, unsigned a1_len, |
260 | const u8 *a2, unsigned a2_len) | |
261 | { | |
262 | if (!a2_len) /* User string is Empty means don't care */ | |
263 | return true; | |
264 | ||
265 | if (a1_len != a2_len) | |
266 | return false; | |
267 | ||
268 | return 0 == memcmp(a1, a2, a1_len); | |
269 | } | |
270 | ||
271 | struct find_oud_t { | |
272 | const struct osd_dev_info *odi; | |
273 | struct device *dev; | |
274 | struct osd_uld_device *oud; | |
275 | } ; | |
276 | ||
277 | int _mach_odi(struct device *dev, void *find_data) | |
278 | { | |
279 | struct osd_uld_device *oud = container_of(dev, struct osd_uld_device, | |
280 | class_dev); | |
281 | struct find_oud_t *fot = find_data; | |
282 | const struct osd_dev_info *odi = fot->odi; | |
283 | ||
284 | if (_the_same_or_null(oud->odi.systemid, oud->odi.systemid_len, | |
285 | odi->systemid, odi->systemid_len) && | |
286 | _the_same_or_null(oud->odi.osdname, oud->odi.osdname_len, | |
287 | odi->osdname, odi->osdname_len)) { | |
288 | OSD_DEBUG("found device sysid_len=%d osdname=%d\n", | |
289 | odi->systemid_len, odi->osdname_len); | |
290 | fot->oud = oud; | |
291 | return 1; | |
292 | } else { | |
293 | return 0; | |
294 | } | |
295 | } | |
296 | ||
297 | /* osduld_info_lookup - Loop through all devices, return the requested osd_dev. | |
298 | * | |
299 | * if @odi->systemid_len and/or @odi->osdname_len are zero, they act as a don't | |
300 | * care. .e.g if they're both zero /dev/osd0 is returned. | |
301 | */ | |
302 | struct osd_dev *osduld_info_lookup(const struct osd_dev_info *odi) | |
303 | { | |
304 | struct find_oud_t find = {.odi = odi}; | |
305 | ||
306 | find.dev = class_find_device(&osd_uld_class, NULL, &find, _mach_odi); | |
307 | if (likely(find.dev)) { | |
308 | struct osd_dev_handle *odh = kzalloc(sizeof(*odh), GFP_KERNEL); | |
309 | ||
310 | if (unlikely(!odh)) { | |
311 | put_device(find.dev); | |
312 | return ERR_PTR(-ENOMEM); | |
313 | } | |
314 | ||
315 | odh->od = find.oud->od; | |
316 | odh->oud = find.oud; | |
317 | ||
318 | return &odh->od; | |
319 | } | |
320 | ||
321 | return ERR_PTR(-ENODEV); | |
322 | } | |
323 | EXPORT_SYMBOL(osduld_info_lookup); | |
324 | ||
b799bc7d BH |
325 | void osduld_put_device(struct osd_dev *od) |
326 | { | |
021e2230 | 327 | if (od && !IS_ERR(od)) { |
d6ae4333 BH |
328 | struct osd_dev_handle *odh = |
329 | container_of(od, struct osd_dev_handle, od); | |
330 | struct osd_uld_device *oud = odh->oud; | |
021e2230 BH |
331 | |
332 | BUG_ON(od->scsi_device != oud->od.scsi_device); | |
333 | ||
89f5e1f2 BH |
334 | /* If scsi has released the device (logout), and exofs has last |
335 | * reference on oud it will be freed by above osd_uld_release | |
336 | * within fput below. But this will oops in cdev_release which | |
d6ae4333 | 337 | * is called after the fops->release. A get_/put_ pair makes |
89f5e1f2 BH |
338 | * sure we have a cdev for the duration of fput |
339 | */ | |
2cdd6410 BH |
340 | if (odh->file) { |
341 | get_device(&oud->class_dev); | |
342 | fput(odh->file); | |
343 | } | |
d6ae4333 BH |
344 | put_device(&oud->class_dev); |
345 | kfree(odh); | |
b799bc7d BH |
346 | } |
347 | } | |
348 | EXPORT_SYMBOL(osduld_put_device); | |
349 | ||
2cdd6410 BH |
350 | const struct osd_dev_info *osduld_device_info(struct osd_dev *od) |
351 | { | |
352 | struct osd_dev_handle *odh = | |
353 | container_of(od, struct osd_dev_handle, od); | |
354 | return &odh->oud->odi; | |
355 | } | |
356 | EXPORT_SYMBOL(osduld_device_info); | |
357 | ||
358 | bool osduld_device_same(struct osd_dev *od, const struct osd_dev_info *odi) | |
359 | { | |
360 | struct osd_dev_handle *odh = | |
361 | container_of(od, struct osd_dev_handle, od); | |
362 | struct osd_uld_device *oud = odh->oud; | |
363 | ||
364 | return (oud->odi.systemid_len == odi->systemid_len) && | |
365 | _the_same_or_null(oud->odi.systemid, oud->odi.systemid_len, | |
366 | odi->systemid, odi->systemid_len) && | |
367 | (oud->odi.osdname_len == odi->osdname_len) && | |
368 | _the_same_or_null(oud->odi.osdname, oud->odi.osdname_len, | |
369 | odi->osdname, odi->osdname_len); | |
370 | } | |
371 | EXPORT_SYMBOL(osduld_device_same); | |
372 | ||
95b05a7d BH |
373 | /* |
374 | * Scsi Device operations | |
375 | */ | |
376 | ||
377 | static int __detect_osd(struct osd_uld_device *oud) | |
378 | { | |
379 | struct scsi_device *scsi_device = oud->od.scsi_device; | |
1b9dce94 | 380 | char caps[OSD_CAP_LEN]; |
95b05a7d BH |
381 | int error; |
382 | ||
383 | /* sending a test_unit_ready as first command seems to be needed | |
384 | * by some targets | |
385 | */ | |
386 | OSD_DEBUG("start scsi_test_unit_ready %p %p %p\n", | |
387 | oud, scsi_device, scsi_device->request_queue); | |
388 | error = scsi_test_unit_ready(scsi_device, 10*HZ, 5, NULL); | |
389 | if (error) | |
390 | OSD_ERR("warning: scsi_test_unit_ready failed\n"); | |
391 | ||
1b9dce94 | 392 | osd_sec_init_nosec_doall_caps(caps, &osd_root_object, false, true); |
2cdd6410 | 393 | if (osd_auto_detect_ver(&oud->od, caps, &oud->odi)) |
1b9dce94 BH |
394 | return -ENODEV; |
395 | ||
95b05a7d BH |
396 | return 0; |
397 | } | |
398 | ||
d6ae4333 BH |
399 | static void __remove(struct device *dev) |
400 | { | |
401 | struct osd_uld_device *oud = container_of(dev, struct osd_uld_device, | |
402 | class_dev); | |
403 | struct scsi_device *scsi_device = oud->od.scsi_device; | |
404 | ||
2cdd6410 BH |
405 | kfree(oud->odi.osdname); |
406 | ||
d6ae4333 BH |
407 | if (oud->cdev.owner) |
408 | cdev_del(&oud->cdev); | |
409 | ||
410 | osd_dev_fini(&oud->od); | |
411 | scsi_device_put(scsi_device); | |
412 | ||
413 | OSD_INFO("osd_remove %s\n", | |
414 | oud->disk ? oud->disk->disk_name : NULL); | |
415 | ||
416 | if (oud->disk) | |
417 | put_disk(oud->disk); | |
418 | ida_remove(&osd_minor_ida, oud->minor); | |
419 | ||
420 | kfree(oud); | |
421 | } | |
95b05a7d BH |
422 | |
423 | static int osd_probe(struct device *dev) | |
424 | { | |
425 | struct scsi_device *scsi_device = to_scsi_device(dev); | |
426 | struct gendisk *disk; | |
427 | struct osd_uld_device *oud; | |
428 | int minor; | |
429 | int error; | |
430 | ||
431 | if (scsi_device->type != TYPE_OSD) | |
432 | return -ENODEV; | |
433 | ||
434 | do { | |
435 | if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL)) | |
436 | return -ENODEV; | |
437 | ||
438 | error = ida_get_new(&osd_minor_ida, &minor); | |
439 | } while (error == -EAGAIN); | |
440 | ||
441 | if (error) | |
442 | return error; | |
443 | if (minor >= SCSI_OSD_MAX_MINOR) { | |
444 | error = -EBUSY; | |
445 | goto err_retract_minor; | |
446 | } | |
447 | ||
448 | error = -ENOMEM; | |
449 | oud = kzalloc(sizeof(*oud), GFP_KERNEL); | |
450 | if (NULL == oud) | |
451 | goto err_retract_minor; | |
452 | ||
95b05a7d BH |
453 | dev_set_drvdata(dev, oud); |
454 | oud->minor = minor; | |
455 | ||
456 | /* allocate a disk and set it up */ | |
457 | /* FIXME: do we need this since sg has already done that */ | |
458 | disk = alloc_disk(1); | |
459 | if (!disk) { | |
460 | OSD_ERR("alloc_disk failed\n"); | |
461 | goto err_free_osd; | |
462 | } | |
463 | disk->major = SCSI_OSD_MAJOR; | |
464 | disk->first_minor = oud->minor; | |
465 | sprintf(disk->disk_name, "osd%d", oud->minor); | |
466 | oud->disk = disk; | |
467 | ||
468 | /* hold one more reference to the scsi_device that will get released | |
469 | * in __release, in case a logout is happening while fs is mounted | |
470 | */ | |
471 | scsi_device_get(scsi_device); | |
472 | osd_dev_init(&oud->od, scsi_device); | |
473 | ||
474 | /* Detect the OSD Version */ | |
475 | error = __detect_osd(oud); | |
476 | if (error) { | |
477 | OSD_ERR("osd detection failed, non-compatible OSD device\n"); | |
478 | goto err_put_disk; | |
479 | } | |
480 | ||
481 | /* init the char-device for communication with user-mode */ | |
482 | cdev_init(&oud->cdev, &osd_fops); | |
483 | oud->cdev.owner = THIS_MODULE; | |
484 | error = cdev_add(&oud->cdev, | |
485 | MKDEV(SCSI_OSD_MAJOR, oud->minor), 1); | |
486 | if (error) { | |
487 | OSD_ERR("cdev_add failed\n"); | |
488 | goto err_put_disk; | |
489 | } | |
d6ae4333 BH |
490 | |
491 | /* class device member */ | |
492 | oud->class_dev.devt = oud->cdev.dev; | |
493 | oud->class_dev.class = &osd_uld_class; | |
494 | oud->class_dev.parent = dev; | |
495 | oud->class_dev.release = __remove; | |
496 | error = dev_set_name(&oud->class_dev, disk->disk_name); | |
497 | if (error) { | |
498 | OSD_ERR("dev_set_name failed => %d\n", error); | |
95b05a7d BH |
499 | goto err_put_cdev; |
500 | } | |
501 | ||
d6ae4333 BH |
502 | error = device_register(&oud->class_dev); |
503 | if (error) { | |
504 | OSD_ERR("device_register failed => %d\n", error); | |
505 | goto err_put_cdev; | |
506 | } | |
507 | ||
508 | get_device(&oud->class_dev); | |
95b05a7d BH |
509 | |
510 | OSD_INFO("osd_probe %s\n", disk->disk_name); | |
511 | return 0; | |
512 | ||
513 | err_put_cdev: | |
514 | cdev_del(&oud->cdev); | |
515 | err_put_disk: | |
516 | scsi_device_put(scsi_device); | |
517 | put_disk(disk); | |
518 | err_free_osd: | |
519 | dev_set_drvdata(dev, NULL); | |
520 | kfree(oud); | |
521 | err_retract_minor: | |
522 | ida_remove(&osd_minor_ida, minor); | |
523 | return error; | |
524 | } | |
525 | ||
526 | static int osd_remove(struct device *dev) | |
527 | { | |
528 | struct scsi_device *scsi_device = to_scsi_device(dev); | |
529 | struct osd_uld_device *oud = dev_get_drvdata(dev); | |
530 | ||
531 | if (!oud || (oud->od.scsi_device != scsi_device)) { | |
532 | OSD_ERR("Half cooked osd-device %p,%p || %p!=%p", | |
533 | dev, oud, oud ? oud->od.scsi_device : NULL, | |
534 | scsi_device); | |
535 | } | |
536 | ||
d6ae4333 | 537 | device_unregister(&oud->class_dev); |
95b05a7d | 538 | |
d6ae4333 | 539 | put_device(&oud->class_dev); |
95b05a7d BH |
540 | return 0; |
541 | } | |
542 | ||
95b05a7d BH |
543 | /* |
544 | * Global driver and scsi registration | |
545 | */ | |
546 | ||
547 | static struct scsi_driver osd_driver = { | |
548 | .owner = THIS_MODULE, | |
549 | .gendrv = { | |
550 | .name = osd_name, | |
551 | .probe = osd_probe, | |
552 | .remove = osd_remove, | |
553 | } | |
554 | }; | |
555 | ||
556 | static int __init osd_uld_init(void) | |
557 | { | |
558 | int err; | |
559 | ||
d6ae4333 BH |
560 | err = class_register(&osd_uld_class); |
561 | if (err) { | |
562 | OSD_ERR("Unable to register sysfs class => %d\n", err); | |
563 | return err; | |
95b05a7d BH |
564 | } |
565 | ||
566 | err = register_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), | |
567 | SCSI_OSD_MAX_MINOR, osd_name); | |
568 | if (err) { | |
569 | OSD_ERR("Unable to register major %d for osd ULD => %d\n", | |
570 | SCSI_OSD_MAJOR, err); | |
571 | goto err_out; | |
572 | } | |
573 | ||
574 | err = scsi_register_driver(&osd_driver.gendrv); | |
575 | if (err) { | |
576 | OSD_ERR("scsi_register_driver failed => %d\n", err); | |
577 | goto err_out_chrdev; | |
578 | } | |
579 | ||
580 | OSD_INFO("LOADED %s\n", osd_version_string); | |
581 | return 0; | |
582 | ||
583 | err_out_chrdev: | |
584 | unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR); | |
585 | err_out: | |
d6ae4333 | 586 | class_unregister(&osd_uld_class); |
95b05a7d BH |
587 | return err; |
588 | } | |
589 | ||
590 | static void __exit osd_uld_exit(void) | |
591 | { | |
592 | scsi_unregister_driver(&osd_driver.gendrv); | |
593 | unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR); | |
d6ae4333 | 594 | class_unregister(&osd_uld_class); |
95b05a7d BH |
595 | OSD_INFO("UNLOADED %s\n", osd_version_string); |
596 | } | |
597 | ||
598 | module_init(osd_uld_init); | |
599 | module_exit(osd_uld_exit); |