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c59ede7 [PATCH] move capable() to capability.h
Randy.Dunlap authored Jan 11, 2006
1 #include <linux/capability.h>
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
2 #include <linux/blkdev.h>
3 #include <linux/blkpg.h>
a885c8c [PATCH] Add block_device_operations.getgeo block device method
Christoph Hellwig authored Jan 8, 2006
4 #include <linux/hdreg.h>
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
5 #include <linux/backing-dev.h>
6 #include <linux/buffer_head.h>
7 #include <linux/smp_lock.h>
2056a78 [PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23
Jens Axboe authored Mar 23, 2006
8 #include <linux/blktrace_api.h>
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
9 #include <asm/uaccess.h>
10
11 static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg)
12 {
13 struct block_device *bdevp;
14 struct gendisk *disk;
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
15 struct hd_struct *part;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
16 struct blkpg_ioctl_arg a;
17 struct blkpg_partition p;
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
18 struct disk_part_iter piter;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
19 long long start, length;
cf771cb @htejun block: make variable and argument names more consistent
htejun authored Sep 3, 2008
20 int partno;
04ebd4a block/ioctl.c and fs/partition/check.c: check value returned by add_p…
Abdel Benamrouche authored Jul 25, 2008
21 int err;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
22
23 if (!capable(CAP_SYS_ADMIN))
24 return -EACCES;
25 if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg)))
26 return -EFAULT;
27 if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition)))
28 return -EFAULT;
29 disk = bdev->bd_disk;
30 if (bdev != bdev->bd_contains)
31 return -EINVAL;
cf771cb @htejun block: make variable and argument names more consistent
htejun authored Sep 3, 2008
32 partno = p.pno;
540eed5 @htejun block: make partition array dynamic
htejun authored Aug 25, 2008
33 if (partno <= 0)
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
34 return -EINVAL;
35 switch (a.op) {
36 case BLKPG_ADD_PARTITION:
37 start = p.start >> 9;
38 length = p.length >> 9;
39 /* check for fit in a hd_struct */
40 if (sizeof(sector_t) == sizeof(long) &&
41 sizeof(long long) > sizeof(long)) {
42 long pstart = start, plength = length;
43 if (pstart != start || plength != length
44 || pstart < 0 || plength < 0)
45 return -EINVAL;
46 }
88e3412 @htejun block: update add_partition() error handling
htejun authored Aug 25, 2008
47
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
48 mutex_lock(&bdev->bd_mutex);
88e3412 @htejun block: update add_partition() error handling
htejun authored Aug 25, 2008
49
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
50 /* overlap? */
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
51 disk_part_iter_init(&piter, disk,
52 DISK_PITER_INCL_EMPTY);
53 while ((part = disk_part_iter_next(&piter))) {
54 if (!(start + length <= part->start_sect ||
55 start >= part->start_sect + part->nr_sects)) {
56 disk_part_iter_exit(&piter);
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
57 mutex_unlock(&bdev->bd_mutex);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
58 return -EBUSY;
59 }
60 }
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
61 disk_part_iter_exit(&piter);
62
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
63 /* all seems OK */
cf771cb @htejun block: make variable and argument names more consistent
htejun authored Sep 3, 2008
64 err = add_partition(disk, partno, start, length,
65 ADDPART_FLAG_NONE);
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
66 mutex_unlock(&bdev->bd_mutex);
04ebd4a block/ioctl.c and fs/partition/check.c: check value returned by add_p…
Abdel Benamrouche authored Jul 25, 2008
67 return err;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
68 case BLKPG_DEL_PARTITION:
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
69 part = disk_get_part(disk, partno);
70 if (!part)
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
71 return -ENXIO;
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
72
73 bdevp = bdget(part_devt(part));
74 disk_put_part(part);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
75 if (!bdevp)
76 return -ENOMEM;
e71bf0d @htejun block: fix disk->part[] dereferencing race
htejun authored Sep 3, 2008
77
2e7b651 [PATCH] remove the old bd_mutex lockdep annotation
Peter Zijlstra authored Dec 8, 2006
78 mutex_lock(&bdevp->bd_mutex);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
79 if (bdevp->bd_openers) {
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
80 mutex_unlock(&bdevp->bd_mutex);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
81 bdput(bdevp);
82 return -EBUSY;
83 }
84 /* all seems OK */
85 fsync_bdev(bdevp);
f98393a mm: remove destroy_dirty_buffers from invalidate_bdev()
Peter Zijlstra authored May 6, 2007
86 invalidate_bdev(bdevp);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
87
6d740cd [PATCH] lockdep: annotate BLKPG_DEL_PARTITION
Peter Zijlstra authored Feb 20, 2007
88 mutex_lock_nested(&bdev->bd_mutex, 1);
cf771cb @htejun block: make variable and argument names more consistent
htejun authored Sep 3, 2008
89 delete_partition(disk, partno);
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
90 mutex_unlock(&bdev->bd_mutex);
91 mutex_unlock(&bdevp->bd_mutex);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
92 bdput(bdevp);
93
94 return 0;
95 default:
96 return -EINVAL;
97 }
98 }
99
100 static int blkdev_reread_part(struct block_device *bdev)
101 {
102 struct gendisk *disk = bdev->bd_disk;
103 int res;
104
b5d0b9d @htejun block: introduce partition 0
htejun authored Sep 3, 2008
105 if (!disk_partitionable(disk) || bdev != bdev->bd_contains)
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
106 return -EINVAL;
107 if (!capable(CAP_SYS_ADMIN))
108 return -EACCES;
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
109 if (!mutex_trylock(&bdev->bd_mutex))
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
110 return -EBUSY;
111 res = rescan_partitions(disk, bdev);
c039e31 [PATCH] sem2mutex: blockdev #2
Arjan van de Ven authored Mar 23, 2006
112 mutex_unlock(&bdev->bd_mutex);
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
113 return res;
114 }
115
d30a260 @dwmw2 Add BLKDISCARD ioctl to allow userspace to discard sectors
dwmw2 authored Aug 11, 2008
116 static void blk_ioc_discard_endio(struct bio *bio, int err)
117 {
118 if (err) {
119 if (err == -EOPNOTSUPP)
120 set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
121 clear_bit(BIO_UPTODATE, &bio->bi_flags);
122 }
123 complete(bio->bi_private);
124 }
125
126 static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
127 uint64_t len)
128 {
129 struct request_queue *q = bdev_get_queue(bdev);
130 int ret = 0;
131
132 if (start & 511)
133 return -EINVAL;
134 if (len & 511)
135 return -EINVAL;
136 start >>= 9;
137 len >>= 9;
138
139 if (start + len > (bdev->bd_inode->i_size >> 9))
140 return -EINVAL;
141
142 if (!q->prepare_discard_fn)
143 return -EOPNOTSUPP;
144
145 while (len && !ret) {
146 DECLARE_COMPLETION_ONSTACK(wait);
147 struct bio *bio;
148
149 bio = bio_alloc(GFP_KERNEL, 0);
150 if (!bio)
151 return -ENOMEM;
152
153 bio->bi_end_io = blk_ioc_discard_endio;
154 bio->bi_bdev = bdev;
155 bio->bi_private = &wait;
156 bio->bi_sector = start;
157
158 if (len > q->max_hw_sectors) {
159 bio->bi_size = q->max_hw_sectors << 9;
160 len -= q->max_hw_sectors;
161 start += q->max_hw_sectors;
162 } else {
163 bio->bi_size = len << 9;
164 len = 0;
165 }
e17fc0a @dwmw2 Allow elevators to sort/merge discard requests
dwmw2 authored Aug 9, 2008
166 submit_bio(DISCARD_NOBARRIER, bio);
d30a260 @dwmw2 Add BLKDISCARD ioctl to allow userspace to discard sectors
dwmw2 authored Aug 11, 2008
167
168 wait_for_completion(&wait);
169
170 if (bio_flagged(bio, BIO_EOPNOTSUPP))
171 ret = -EOPNOTSUPP;
172 else if (!bio_flagged(bio, BIO_UPTODATE))
173 ret = -EIO;
174 bio_put(bio);
175 }
176 return ret;
177 }
178
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
179 static int put_ushort(unsigned long arg, unsigned short val)
180 {
181 return put_user(val, (unsigned short __user *)arg);
182 }
183
184 static int put_int(unsigned long arg, int val)
185 {
186 return put_user(val, (int __user *)arg);
187 }
188
189 static int put_long(unsigned long arg, long val)
190 {
191 return put_user(val, (long __user *)arg);
192 }
193
194 static int put_ulong(unsigned long arg, unsigned long val)
195 {
196 return put_user(val, (unsigned long __user *)arg);
197 }
198
199 static int put_u64(unsigned long arg, u64 val)
200 {
201 return put_user(val, (u64 __user *)arg);
202 }
203
633a08b [PATCH] introduce __blkdev_driver_ioctl()
Al Viro authored Aug 29, 2007
204 int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
205 unsigned cmd, unsigned long arg)
206 {
207 struct gendisk *disk = bdev->bd_disk;
208 int ret;
d4430d6 [PATCH] beginning of methods conversion
Al Viro authored Mar 2, 2008
209
210 if (disk->fops->ioctl)
211 return disk->fops->ioctl(bdev, mode, cmd, arg);
633a08b [PATCH] introduce __blkdev_driver_ioctl()
Al Viro authored Aug 30, 2007
212
d4430d6 [PATCH] beginning of methods conversion
Al Viro authored Mar 2, 2008
213 if (disk->fops->locked_ioctl) {
633a08b [PATCH] introduce __blkdev_driver_ioctl()
Al Viro authored Aug 30, 2007
214 lock_kernel();
d4430d6 [PATCH] beginning of methods conversion
Al Viro authored Mar 2, 2008
215 ret = disk->fops->locked_ioctl(bdev, mode, cmd, arg);
633a08b [PATCH] introduce __blkdev_driver_ioctl()
Al Viro authored Aug 30, 2007
216 unlock_kernel();
217 return ret;
218 }
219
220 return -ENOTTY;
221 }
222 /*
223 * For the record: _GPL here is only because somebody decided to slap it
224 * on the previous export. Sheer idiocy, since it wasn't copyrightable
225 * at all and could be open-coded without any exports by anybody who cares.
226 */
227 EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
228
f58c4c0 @arndb compat_ioctl: move common block ioctls to compat_blkdev_ioctl
arndb authored Oct 9, 2007
229 /*
230 * always keep this in sync with compat_blkdev_ioctl() and
231 * compat_blkdev_locked_ioctl()
232 */
56b26ad [PATCH] kill the rest of struct file propagation in block ioctls
Al Viro authored Sep 19, 2008
233 int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
234 unsigned long arg)
235 {
236 struct gendisk *disk = bdev->bd_disk;
45048d0 [PATCH] get rid of blkdev_locked_ioctl()
Al Viro authored Sep 18, 2008
237 struct backing_dev_info *bdi;
238 loff_t size;
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
239 int ret, n;
240
241 switch(cmd) {
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
242 case BLKFLSBUF:
243 if (!capable(CAP_SYS_ADMIN))
244 return -EACCES;
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
245
e436fda [PATCH] get rid of blkdev_driver_ioctl()
Al Viro authored Sep 18, 2008
246 ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
247 /* -EINVAL to handle old uncorrected drivers */
248 if (ret != -EINVAL && ret != -ENOTTY)
249 return ret;
250
251 lock_kernel();
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
252 fsync_bdev(bdev);
f98393a mm: remove destroy_dirty_buffers from invalidate_bdev()
Peter Zijlstra authored May 6, 2007
253 invalidate_bdev(bdev);
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
254 unlock_kernel();
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
255 return 0;
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
256
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
257 case BLKROSET:
e436fda [PATCH] get rid of blkdev_driver_ioctl()
Al Viro authored Sep 18, 2008
258 ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
259 /* -EINVAL to handle old uncorrected drivers */
260 if (ret != -EINVAL && ret != -ENOTTY)
261 return ret;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
262 if (!capable(CAP_SYS_ADMIN))
263 return -EACCES;
264 if (get_user(n, (int __user *)(arg)))
265 return -EFAULT;
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
266 lock_kernel();
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
267 set_device_ro(bdev, n);
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
268 unlock_kernel();
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
269 return 0;
d30a260 @dwmw2 Add BLKDISCARD ioctl to allow userspace to discard sectors
dwmw2 authored Aug 11, 2008
270
271 case BLKDISCARD: {
272 uint64_t range[2];
273
e436fda [PATCH] get rid of blkdev_driver_ioctl()
Al Viro authored Sep 18, 2008
274 if (!(mode & FMODE_WRITE))
d30a260 @dwmw2 Add BLKDISCARD ioctl to allow userspace to discard sectors
dwmw2 authored Aug 11, 2008
275 return -EBADF;
276
277 if (copy_from_user(range, (void __user *)arg, sizeof(range)))
278 return -EFAULT;
279
280 return blk_ioctl_discard(bdev, range[0], range[1]);
281 }
282
a885c8c [PATCH] Add block_device_operations.getgeo block device method
Christoph Hellwig authored Jan 8, 2006
283 case HDIO_GETGEO: {
284 struct hd_geometry geo;
285
286 if (!arg)
287 return -EINVAL;
288 if (!disk->fops->getgeo)
289 return -ENOTTY;
290
291 /*
292 * We need to set the startsect first, the driver may
293 * want to override it.
294 */
295 geo.start = get_start_sect(bdev);
296 ret = disk->fops->getgeo(bdev, &geo);
297 if (ret)
298 return ret;
299 if (copy_to_user((struct hd_geometry __user *)arg, &geo,
300 sizeof(geo)))
301 return -EFAULT;
302 return 0;
303 }
45048d0 [PATCH] get rid of blkdev_locked_ioctl()
Al Viro authored Sep 18, 2008
304 case BLKRAGET:
305 case BLKFRAGET:
306 if (!arg)
307 return -EINVAL;
308 bdi = blk_get_backing_dev_info(bdev);
309 if (bdi == NULL)
310 return -ENOTTY;
311 return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
312 case BLKROGET:
313 return put_int(arg, bdev_read_only(bdev) != 0);
314 case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */
315 return put_int(arg, block_size(bdev));
316 case BLKSSZGET: /* get block device hardware sector size */
317 return put_int(arg, bdev_hardsect_size(bdev));
318 case BLKSECTGET:
319 return put_ushort(arg, bdev_get_queue(bdev)->max_sectors);
320 case BLKRASET:
321 case BLKFRASET:
322 if(!capable(CAP_SYS_ADMIN))
323 return -EACCES;
324 bdi = blk_get_backing_dev_info(bdev);
325 if (bdi == NULL)
326 return -ENOTTY;
327 lock_kernel();
328 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
329 unlock_kernel();
330 return 0;
331 case BLKBSZSET:
332 /* set the logical block size */
333 if (!capable(CAP_SYS_ADMIN))
334 return -EACCES;
335 if (!arg)
336 return -EINVAL;
337 if (get_user(n, (int __user *) arg))
338 return -EFAULT;
6af3a56 [PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET
Al Viro authored Sep 19, 2008
339 if (!(mode & FMODE_EXCL) && bd_claim(bdev, &bdev) < 0)
45048d0 [PATCH] get rid of blkdev_locked_ioctl()
Al Viro authored Sep 18, 2008
340 return -EBUSY;
341 ret = set_blocksize(bdev, n);
6af3a56 [PATCH] get rid of struct file use in blkdev_ioctl() BLKBSZSET
Al Viro authored Sep 19, 2008
342 if (!(mode & FMODE_EXCL))
343 bd_release(bdev);
bb93e3a @arndb [PATCH] block: add unlocked_ioctl support for block devices
arndb authored Jun 23, 2005
344 return ret;
45048d0 [PATCH] get rid of blkdev_locked_ioctl()
Al Viro authored Sep 18, 2008
345 case BLKPG:
346 lock_kernel();
347 ret = blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg);
348 unlock_kernel();
349 break;
350 case BLKRRPART:
351 lock_kernel();
352 ret = blkdev_reread_part(bdev);
353 unlock_kernel();
354 break;
355 case BLKGETSIZE:
356 size = bdev->bd_inode->i_size;
357 if ((size >> 9) > ~0UL)
358 return -EFBIG;
359 return put_ulong(arg, size >> 9);
360 case BLKGETSIZE64:
361 return put_u64(arg, bdev->bd_inode->i_size);
362 case BLKTRACESTART:
363 case BLKTRACESTOP:
364 case BLKTRACESETUP:
365 case BLKTRACETEARDOWN:
366 lock_kernel();
367 ret = blk_trace_ioctl(bdev, cmd, (char __user *) arg);
368 unlock_kernel();
369 break;
370 default:
371 ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
372 }
373 return ret;
1da177e Linux-2.6.12-rc2
Linus Torvalds authored Apr 16, 2005
374 }
68f66fe @sctweedie [PATCH] Fix root hole in raw device
sctweedie authored May 13, 2005
375 EXPORT_SYMBOL_GPL(blkdev_ioctl);
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