Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 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> |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 52 | #include <linux/file.h> |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 53 | |
| 54 | #include <scsi/scsi.h> |
| 55 | #include <scsi/scsi_driver.h> |
| 56 | #include <scsi/scsi_device.h> |
| 57 | #include <scsi/scsi_ioctl.h> |
| 58 | |
| 59 | #include <scsi/osd_initiator.h> |
| 60 | #include <scsi/osd_sec.h> |
| 61 | |
| 62 | #include "osd_debug.h" |
| 63 | |
| 64 | #ifndef TYPE_OSD |
| 65 | # define TYPE_OSD 0x11 |
| 66 | #endif |
| 67 | |
| 68 | #ifndef SCSI_OSD_MAJOR |
| 69 | # define SCSI_OSD_MAJOR 260 |
| 70 | #endif |
| 71 | #define SCSI_OSD_MAX_MINOR 64 |
| 72 | |
| 73 | static const char osd_name[] = "osd"; |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 74 | static const char *osd_version_string = "open-osd 0.2.0"; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 75 | |
| 76 | MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>"); |
| 77 | MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko"); |
| 78 | MODULE_LICENSE("GPL"); |
| 79 | MODULE_ALIAS_CHARDEV_MAJOR(SCSI_OSD_MAJOR); |
| 80 | MODULE_ALIAS_SCSI_DEVICE(TYPE_OSD); |
| 81 | |
| 82 | struct osd_uld_device { |
| 83 | int minor; |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 84 | struct device class_dev; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 85 | struct cdev cdev; |
| 86 | struct osd_dev od; |
| 87 | struct gendisk *disk; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 88 | }; |
| 89 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 90 | struct osd_dev_handle { |
| 91 | struct osd_dev od; |
| 92 | struct file *file; |
| 93 | struct osd_uld_device *oud; |
| 94 | } ; |
| 95 | |
| 96 | static DEFINE_IDA(osd_minor_ida); |
| 97 | |
| 98 | static struct class osd_uld_class = { |
| 99 | .owner = THIS_MODULE, |
| 100 | .name = "scsi_osd", |
| 101 | }; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 102 | |
| 103 | /* |
| 104 | * Char Device operations |
| 105 | */ |
| 106 | |
| 107 | static int osd_uld_open(struct inode *inode, struct file *file) |
| 108 | { |
| 109 | struct osd_uld_device *oud = container_of(inode->i_cdev, |
| 110 | struct osd_uld_device, cdev); |
| 111 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 112 | get_device(&oud->class_dev); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 113 | /* cache osd_uld_device on file handle */ |
| 114 | file->private_data = oud; |
| 115 | OSD_DEBUG("osd_uld_open %p\n", oud); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int osd_uld_release(struct inode *inode, struct file *file) |
| 120 | { |
| 121 | struct osd_uld_device *oud = file->private_data; |
| 122 | |
| 123 | OSD_DEBUG("osd_uld_release %p\n", file->private_data); |
| 124 | file->private_data = NULL; |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 125 | put_device(&oud->class_dev); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | /* FIXME: Only one vector for now */ |
| 130 | unsigned g_test_ioctl; |
| 131 | do_test_fn *g_do_test; |
| 132 | |
| 133 | int osduld_register_test(unsigned ioctl, do_test_fn *do_test) |
| 134 | { |
| 135 | if (g_test_ioctl) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | g_test_ioctl = ioctl; |
| 139 | g_do_test = do_test; |
| 140 | return 0; |
| 141 | } |
| 142 | EXPORT_SYMBOL(osduld_register_test); |
| 143 | |
| 144 | void osduld_unregister_test(unsigned ioctl) |
| 145 | { |
| 146 | if (ioctl == g_test_ioctl) { |
| 147 | g_test_ioctl = 0; |
| 148 | g_do_test = NULL; |
| 149 | } |
| 150 | } |
| 151 | EXPORT_SYMBOL(osduld_unregister_test); |
| 152 | |
| 153 | static do_test_fn *_find_ioctl(unsigned cmd) |
| 154 | { |
| 155 | if (g_test_ioctl == cmd) |
| 156 | return g_do_test; |
| 157 | else |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | static long osd_uld_ioctl(struct file *file, unsigned int cmd, |
| 162 | unsigned long arg) |
| 163 | { |
| 164 | struct osd_uld_device *oud = file->private_data; |
| 165 | int ret; |
| 166 | do_test_fn *do_test; |
| 167 | |
| 168 | do_test = _find_ioctl(cmd); |
| 169 | if (do_test) |
| 170 | ret = do_test(&oud->od, cmd, arg); |
| 171 | else { |
| 172 | OSD_ERR("Unknown ioctl %d: osd_uld_device=%p\n", cmd, oud); |
| 173 | ret = -ENOIOCTLCMD; |
| 174 | } |
| 175 | return ret; |
| 176 | } |
| 177 | |
| 178 | static const struct file_operations osd_fops = { |
| 179 | .owner = THIS_MODULE, |
| 180 | .open = osd_uld_open, |
| 181 | .release = osd_uld_release, |
| 182 | .unlocked_ioctl = osd_uld_ioctl, |
| 183 | }; |
| 184 | |
Al Viro | e24977d | 2009-04-02 21:17:03 -0400 | [diff] [blame] | 185 | struct osd_dev *osduld_path_lookup(const char *name) |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 186 | { |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 187 | struct osd_uld_device *oud; |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 188 | struct osd_dev_handle *odh; |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 189 | struct file *file; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 190 | int error; |
| 191 | |
Al Viro | e24977d | 2009-04-02 21:17:03 -0400 | [diff] [blame] | 192 | if (!name || !*name) { |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 193 | OSD_ERR("Mount with !path || !*path\n"); |
| 194 | return ERR_PTR(-EINVAL); |
| 195 | } |
| 196 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 197 | odh = kzalloc(sizeof(*odh), GFP_KERNEL); |
| 198 | if (unlikely(!odh)) |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 199 | return ERR_PTR(-ENOMEM); |
| 200 | |
| 201 | file = filp_open(name, O_RDWR, 0); |
| 202 | if (IS_ERR(file)) { |
| 203 | error = PTR_ERR(file); |
| 204 | goto free_od; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 205 | } |
| 206 | |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 207 | if (file->f_op != &osd_fops){ |
| 208 | error = -EINVAL; |
| 209 | goto close_file; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 210 | } |
| 211 | |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 212 | oud = file->private_data; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 213 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 214 | odh->od = oud->od; |
| 215 | odh->file = file; |
| 216 | odh->oud = oud; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 217 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 218 | return &odh->od; |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 219 | |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 220 | close_file: |
| 221 | fput(file); |
| 222 | free_od: |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 223 | kfree(odh); |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 224 | return ERR_PTR(error); |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 225 | } |
| 226 | EXPORT_SYMBOL(osduld_path_lookup); |
| 227 | |
| 228 | void osduld_put_device(struct osd_dev *od) |
| 229 | { |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 230 | if (od && !IS_ERR(od)) { |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 231 | struct osd_dev_handle *odh = |
| 232 | container_of(od, struct osd_dev_handle, od); |
| 233 | struct osd_uld_device *oud = odh->oud; |
Boaz Harrosh | 021e223 | 2009-05-24 20:05:05 +0300 | [diff] [blame] | 234 | |
| 235 | BUG_ON(od->scsi_device != oud->od.scsi_device); |
| 236 | |
Boaz Harrosh | 89f5e1f | 2009-11-16 20:44:02 +0200 | [diff] [blame] | 237 | /* If scsi has released the device (logout), and exofs has last |
| 238 | * reference on oud it will be freed by above osd_uld_release |
| 239 | * within fput below. But this will oops in cdev_release which |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 240 | * is called after the fops->release. A get_/put_ pair makes |
Boaz Harrosh | 89f5e1f | 2009-11-16 20:44:02 +0200 | [diff] [blame] | 241 | * sure we have a cdev for the duration of fput |
| 242 | */ |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 243 | get_device(&oud->class_dev); |
| 244 | fput(odh->file); |
| 245 | put_device(&oud->class_dev); |
| 246 | kfree(odh); |
Boaz Harrosh | b799bc7 | 2009-01-25 16:58:03 +0200 | [diff] [blame] | 247 | } |
| 248 | } |
| 249 | EXPORT_SYMBOL(osduld_put_device); |
| 250 | |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 251 | /* |
| 252 | * Scsi Device operations |
| 253 | */ |
| 254 | |
| 255 | static int __detect_osd(struct osd_uld_device *oud) |
| 256 | { |
| 257 | struct scsi_device *scsi_device = oud->od.scsi_device; |
Boaz Harrosh | 1b9dce9 | 2009-01-25 17:13:38 +0200 | [diff] [blame] | 258 | char caps[OSD_CAP_LEN]; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 259 | int error; |
| 260 | |
| 261 | /* sending a test_unit_ready as first command seems to be needed |
| 262 | * by some targets |
| 263 | */ |
| 264 | OSD_DEBUG("start scsi_test_unit_ready %p %p %p\n", |
| 265 | oud, scsi_device, scsi_device->request_queue); |
| 266 | error = scsi_test_unit_ready(scsi_device, 10*HZ, 5, NULL); |
| 267 | if (error) |
| 268 | OSD_ERR("warning: scsi_test_unit_ready failed\n"); |
| 269 | |
Boaz Harrosh | 1b9dce9 | 2009-01-25 17:13:38 +0200 | [diff] [blame] | 270 | osd_sec_init_nosec_doall_caps(caps, &osd_root_object, false, true); |
| 271 | if (osd_auto_detect_ver(&oud->od, caps)) |
| 272 | return -ENODEV; |
| 273 | |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 274 | return 0; |
| 275 | } |
| 276 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 277 | static void __remove(struct device *dev) |
| 278 | { |
| 279 | struct osd_uld_device *oud = container_of(dev, struct osd_uld_device, |
| 280 | class_dev); |
| 281 | struct scsi_device *scsi_device = oud->od.scsi_device; |
| 282 | |
| 283 | if (oud->cdev.owner) |
| 284 | cdev_del(&oud->cdev); |
| 285 | |
| 286 | osd_dev_fini(&oud->od); |
| 287 | scsi_device_put(scsi_device); |
| 288 | |
| 289 | OSD_INFO("osd_remove %s\n", |
| 290 | oud->disk ? oud->disk->disk_name : NULL); |
| 291 | |
| 292 | if (oud->disk) |
| 293 | put_disk(oud->disk); |
| 294 | ida_remove(&osd_minor_ida, oud->minor); |
| 295 | |
| 296 | kfree(oud); |
| 297 | } |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 298 | |
| 299 | static int osd_probe(struct device *dev) |
| 300 | { |
| 301 | struct scsi_device *scsi_device = to_scsi_device(dev); |
| 302 | struct gendisk *disk; |
| 303 | struct osd_uld_device *oud; |
| 304 | int minor; |
| 305 | int error; |
| 306 | |
| 307 | if (scsi_device->type != TYPE_OSD) |
| 308 | return -ENODEV; |
| 309 | |
| 310 | do { |
| 311 | if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL)) |
| 312 | return -ENODEV; |
| 313 | |
| 314 | error = ida_get_new(&osd_minor_ida, &minor); |
| 315 | } while (error == -EAGAIN); |
| 316 | |
| 317 | if (error) |
| 318 | return error; |
| 319 | if (minor >= SCSI_OSD_MAX_MINOR) { |
| 320 | error = -EBUSY; |
| 321 | goto err_retract_minor; |
| 322 | } |
| 323 | |
| 324 | error = -ENOMEM; |
| 325 | oud = kzalloc(sizeof(*oud), GFP_KERNEL); |
| 326 | if (NULL == oud) |
| 327 | goto err_retract_minor; |
| 328 | |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 329 | dev_set_drvdata(dev, oud); |
| 330 | oud->minor = minor; |
| 331 | |
| 332 | /* allocate a disk and set it up */ |
| 333 | /* FIXME: do we need this since sg has already done that */ |
| 334 | disk = alloc_disk(1); |
| 335 | if (!disk) { |
| 336 | OSD_ERR("alloc_disk failed\n"); |
| 337 | goto err_free_osd; |
| 338 | } |
| 339 | disk->major = SCSI_OSD_MAJOR; |
| 340 | disk->first_minor = oud->minor; |
| 341 | sprintf(disk->disk_name, "osd%d", oud->minor); |
| 342 | oud->disk = disk; |
| 343 | |
| 344 | /* hold one more reference to the scsi_device that will get released |
| 345 | * in __release, in case a logout is happening while fs is mounted |
| 346 | */ |
| 347 | scsi_device_get(scsi_device); |
| 348 | osd_dev_init(&oud->od, scsi_device); |
| 349 | |
| 350 | /* Detect the OSD Version */ |
| 351 | error = __detect_osd(oud); |
| 352 | if (error) { |
| 353 | OSD_ERR("osd detection failed, non-compatible OSD device\n"); |
| 354 | goto err_put_disk; |
| 355 | } |
| 356 | |
| 357 | /* init the char-device for communication with user-mode */ |
| 358 | cdev_init(&oud->cdev, &osd_fops); |
| 359 | oud->cdev.owner = THIS_MODULE; |
| 360 | error = cdev_add(&oud->cdev, |
| 361 | MKDEV(SCSI_OSD_MAJOR, oud->minor), 1); |
| 362 | if (error) { |
| 363 | OSD_ERR("cdev_add failed\n"); |
| 364 | goto err_put_disk; |
| 365 | } |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 366 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 367 | /* class device member */ |
| 368 | oud->class_dev.devt = oud->cdev.dev; |
| 369 | oud->class_dev.class = &osd_uld_class; |
| 370 | oud->class_dev.parent = dev; |
| 371 | oud->class_dev.release = __remove; |
| 372 | error = dev_set_name(&oud->class_dev, disk->disk_name); |
| 373 | if (error) { |
| 374 | OSD_ERR("dev_set_name failed => %d\n", error); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 375 | goto err_put_cdev; |
| 376 | } |
| 377 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 378 | error = device_register(&oud->class_dev); |
| 379 | if (error) { |
| 380 | OSD_ERR("device_register failed => %d\n", error); |
| 381 | goto err_put_cdev; |
| 382 | } |
| 383 | |
| 384 | get_device(&oud->class_dev); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 385 | |
| 386 | OSD_INFO("osd_probe %s\n", disk->disk_name); |
| 387 | return 0; |
| 388 | |
| 389 | err_put_cdev: |
| 390 | cdev_del(&oud->cdev); |
| 391 | err_put_disk: |
| 392 | scsi_device_put(scsi_device); |
| 393 | put_disk(disk); |
| 394 | err_free_osd: |
| 395 | dev_set_drvdata(dev, NULL); |
| 396 | kfree(oud); |
| 397 | err_retract_minor: |
| 398 | ida_remove(&osd_minor_ida, minor); |
| 399 | return error; |
| 400 | } |
| 401 | |
| 402 | static int osd_remove(struct device *dev) |
| 403 | { |
| 404 | struct scsi_device *scsi_device = to_scsi_device(dev); |
| 405 | struct osd_uld_device *oud = dev_get_drvdata(dev); |
| 406 | |
| 407 | if (!oud || (oud->od.scsi_device != scsi_device)) { |
| 408 | OSD_ERR("Half cooked osd-device %p,%p || %p!=%p", |
| 409 | dev, oud, oud ? oud->od.scsi_device : NULL, |
| 410 | scsi_device); |
| 411 | } |
| 412 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 413 | device_unregister(&oud->class_dev); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 414 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 415 | put_device(&oud->class_dev); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 416 | return 0; |
| 417 | } |
| 418 | |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 419 | /* |
| 420 | * Global driver and scsi registration |
| 421 | */ |
| 422 | |
| 423 | static struct scsi_driver osd_driver = { |
| 424 | .owner = THIS_MODULE, |
| 425 | .gendrv = { |
| 426 | .name = osd_name, |
| 427 | .probe = osd_probe, |
| 428 | .remove = osd_remove, |
| 429 | } |
| 430 | }; |
| 431 | |
| 432 | static int __init osd_uld_init(void) |
| 433 | { |
| 434 | int err; |
| 435 | |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 436 | err = class_register(&osd_uld_class); |
| 437 | if (err) { |
| 438 | OSD_ERR("Unable to register sysfs class => %d\n", err); |
| 439 | return err; |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | err = register_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), |
| 443 | SCSI_OSD_MAX_MINOR, osd_name); |
| 444 | if (err) { |
| 445 | OSD_ERR("Unable to register major %d for osd ULD => %d\n", |
| 446 | SCSI_OSD_MAJOR, err); |
| 447 | goto err_out; |
| 448 | } |
| 449 | |
| 450 | err = scsi_register_driver(&osd_driver.gendrv); |
| 451 | if (err) { |
| 452 | OSD_ERR("scsi_register_driver failed => %d\n", err); |
| 453 | goto err_out_chrdev; |
| 454 | } |
| 455 | |
| 456 | OSD_INFO("LOADED %s\n", osd_version_string); |
| 457 | return 0; |
| 458 | |
| 459 | err_out_chrdev: |
| 460 | unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR); |
| 461 | err_out: |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 462 | class_unregister(&osd_uld_class); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 463 | return err; |
| 464 | } |
| 465 | |
| 466 | static void __exit osd_uld_exit(void) |
| 467 | { |
| 468 | scsi_unregister_driver(&osd_driver.gendrv); |
| 469 | unregister_chrdev_region(MKDEV(SCSI_OSD_MAJOR, 0), SCSI_OSD_MAX_MINOR); |
Boaz Harrosh | d6ae433 | 2009-11-29 16:25:26 +0200 | [diff] [blame^] | 470 | class_unregister(&osd_uld_class); |
Boaz Harrosh | 95b05a7 | 2009-01-25 16:56:47 +0200 | [diff] [blame] | 471 | OSD_INFO("UNLOADED %s\n", osd_version_string); |
| 472 | } |
| 473 | |
| 474 | module_init(osd_uld_init); |
| 475 | module_exit(osd_uld_exit); |