Randy.Dunlap | c59ede7 | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 1 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #include <linux/blkdev.h> |
Paul Gortmaker | d5decd3 | 2011-05-26 16:00:52 -0400 | [diff] [blame] | 3 | #include <linux/export.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 4 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/blkpg.h> |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 6 | #include <linux/hdreg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/backing-dev.h> |
Al Viro | ff01bb4 | 2011-09-16 02:31:11 -0400 | [diff] [blame] | 8 | #include <linux/fs.h> |
Jens Axboe | 2056a78 | 2006-03-23 20:00:26 +0100 | [diff] [blame] | 9 | #include <linux/blktrace_api.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <asm/uaccess.h> |
| 11 | |
| 12 | static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user *arg) |
| 13 | { |
| 14 | struct block_device *bdevp; |
| 15 | struct gendisk *disk; |
Vivek Goyal | c83f6bf | 2012-08-01 12:24:18 +0200 | [diff] [blame] | 16 | struct hd_struct *part, *lpart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | struct blkpg_ioctl_arg a; |
| 18 | struct blkpg_partition p; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 19 | struct disk_part_iter piter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | long long start, length; |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 21 | int partno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 32 | partno = p.pno; |
Tejun Heo | 540eed5 | 2008-08-25 19:56:15 +0900 | [diff] [blame] | 33 | if (partno <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | return -EINVAL; |
| 35 | switch (a.op) { |
| 36 | case BLKPG_ADD_PARTITION: |
| 37 | start = p.start >> 9; |
| 38 | length = p.length >> 9; |
Vivek Goyal | c83f6bf | 2012-08-01 12:24:18 +0200 | [diff] [blame] | 39 | /* check for fit in a hd_struct */ |
| 40 | if (sizeof(sector_t) == sizeof(long) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | sizeof(long long) > sizeof(long)) { |
| 42 | long pstart = start, plength = length; |
| 43 | if (pstart != start || plength != length |
Alan Cox | 2bd6efa | 2012-09-17 11:47:13 +0100 | [diff] [blame] | 44 | || pstart < 0 || plength < 0 || partno > 65535) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | return -EINVAL; |
| 46 | } |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 47 | |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 48 | mutex_lock(&bdev->bd_mutex); |
Tejun Heo | 88e3412 | 2008-08-25 19:30:16 +0900 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /* overlap? */ |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 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); |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 57 | mutex_unlock(&bdev->bd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | return -EBUSY; |
| 59 | } |
| 60 | } |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 61 | disk_part_iter_exit(&piter); |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* all seems OK */ |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 64 | part = add_partition(disk, partno, start, length, |
Will Drewry | 6d1d805 | 2010-08-31 15:47:05 -0500 | [diff] [blame] | 65 | ADDPART_FLAG_NONE, NULL); |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 66 | mutex_unlock(&bdev->bd_mutex); |
Tejun Heo | ba32929 | 2008-11-10 15:29:58 +0900 | [diff] [blame] | 67 | return IS_ERR(part) ? PTR_ERR(part) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | case BLKPG_DEL_PARTITION: |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 69 | part = disk_get_part(disk, partno); |
| 70 | if (!part) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | return -ENXIO; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 72 | |
| 73 | bdevp = bdget(part_devt(part)); |
| 74 | disk_put_part(part); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | if (!bdevp) |
| 76 | return -ENOMEM; |
Tejun Heo | e71bf0d | 2008-09-03 09:03:02 +0200 | [diff] [blame] | 77 | |
Peter Zijlstra | 2e7b651 | 2006-12-08 02:36:13 -0800 | [diff] [blame] | 78 | mutex_lock(&bdevp->bd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | if (bdevp->bd_openers) { |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 80 | mutex_unlock(&bdevp->bd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | bdput(bdevp); |
| 82 | return -EBUSY; |
| 83 | } |
| 84 | /* all seems OK */ |
| 85 | fsync_bdev(bdevp); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 86 | invalidate_bdev(bdevp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Peter Zijlstra | 6d740cd | 2007-02-20 13:58:18 -0800 | [diff] [blame] | 88 | mutex_lock_nested(&bdev->bd_mutex, 1); |
Tejun Heo | cf771cb | 2008-09-03 09:01:09 +0200 | [diff] [blame] | 89 | delete_partition(disk, partno); |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 90 | mutex_unlock(&bdev->bd_mutex); |
| 91 | mutex_unlock(&bdevp->bd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | bdput(bdevp); |
| 93 | |
| 94 | return 0; |
Vivek Goyal | c83f6bf | 2012-08-01 12:24:18 +0200 | [diff] [blame] | 95 | case BLKPG_RESIZE_PARTITION: |
| 96 | start = p.start >> 9; |
| 97 | /* new length of partition in bytes */ |
| 98 | length = p.length >> 9; |
| 99 | /* check for fit in a hd_struct */ |
| 100 | if (sizeof(sector_t) == sizeof(long) && |
| 101 | sizeof(long long) > sizeof(long)) { |
| 102 | long pstart = start, plength = length; |
| 103 | if (pstart != start || plength != length |
| 104 | || pstart < 0 || plength < 0) |
| 105 | return -EINVAL; |
| 106 | } |
| 107 | part = disk_get_part(disk, partno); |
| 108 | if (!part) |
| 109 | return -ENXIO; |
| 110 | bdevp = bdget(part_devt(part)); |
| 111 | if (!bdevp) { |
| 112 | disk_put_part(part); |
| 113 | return -ENOMEM; |
| 114 | } |
| 115 | mutex_lock(&bdevp->bd_mutex); |
| 116 | mutex_lock_nested(&bdev->bd_mutex, 1); |
| 117 | if (start != part->start_sect) { |
| 118 | mutex_unlock(&bdevp->bd_mutex); |
| 119 | mutex_unlock(&bdev->bd_mutex); |
| 120 | bdput(bdevp); |
| 121 | disk_put_part(part); |
| 122 | return -EINVAL; |
| 123 | } |
| 124 | /* overlap? */ |
| 125 | disk_part_iter_init(&piter, disk, |
| 126 | DISK_PITER_INCL_EMPTY); |
| 127 | while ((lpart = disk_part_iter_next(&piter))) { |
| 128 | if (lpart->partno != partno && |
| 129 | !(start + length <= lpart->start_sect || |
| 130 | start >= lpart->start_sect + lpart->nr_sects) |
| 131 | ) { |
| 132 | disk_part_iter_exit(&piter); |
| 133 | mutex_unlock(&bdevp->bd_mutex); |
| 134 | mutex_unlock(&bdev->bd_mutex); |
| 135 | bdput(bdevp); |
| 136 | disk_put_part(part); |
| 137 | return -EBUSY; |
| 138 | } |
| 139 | } |
| 140 | disk_part_iter_exit(&piter); |
| 141 | part_nr_sects_write(part, (sector_t)length); |
| 142 | i_size_write(bdevp->bd_inode, p.length); |
| 143 | mutex_unlock(&bdevp->bd_mutex); |
| 144 | mutex_unlock(&bdev->bd_mutex); |
| 145 | bdput(bdevp); |
| 146 | disk_put_part(part); |
| 147 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | default: |
| 149 | return -EINVAL; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static int blkdev_reread_part(struct block_device *bdev) |
| 154 | { |
| 155 | struct gendisk *disk = bdev->bd_disk; |
| 156 | int res; |
| 157 | |
Tejun Heo | d27769e | 2011-08-23 20:01:04 +0200 | [diff] [blame] | 158 | if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | return -EINVAL; |
| 160 | if (!capable(CAP_SYS_ADMIN)) |
| 161 | return -EACCES; |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 162 | if (!mutex_trylock(&bdev->bd_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return -EBUSY; |
| 164 | res = rescan_partitions(disk, bdev); |
Arjan van de Ven | c039e31 | 2006-03-23 03:00:28 -0800 | [diff] [blame] | 165 | mutex_unlock(&bdev->bd_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return res; |
| 167 | } |
| 168 | |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 169 | static int blk_ioctl_discard(struct block_device *bdev, uint64_t start, |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 170 | uint64_t len, int secure) |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 171 | { |
Christoph Hellwig | dd3932e | 2010-09-16 20:51:46 +0200 | [diff] [blame] | 172 | unsigned long flags = 0; |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 173 | |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 174 | if (start & 511) |
| 175 | return -EINVAL; |
| 176 | if (len & 511) |
| 177 | return -EINVAL; |
| 178 | start >>= 9; |
| 179 | len >>= 9; |
| 180 | |
Mike Snitzer | 77304d2 | 2010-11-08 14:39:12 +0100 | [diff] [blame] | 181 | if (start + len > (i_size_read(bdev->bd_inode) >> 9)) |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 182 | return -EINVAL; |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 183 | if (secure) |
Christoph Hellwig | dd3932e | 2010-09-16 20:51:46 +0200 | [diff] [blame] | 184 | flags |= BLKDEV_DISCARD_SECURE; |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 185 | return blkdev_issue_discard(bdev, start, len, GFP_KERNEL, flags); |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 186 | } |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static int put_ushort(unsigned long arg, unsigned short val) |
| 189 | { |
| 190 | return put_user(val, (unsigned short __user *)arg); |
| 191 | } |
| 192 | |
| 193 | static int put_int(unsigned long arg, int val) |
| 194 | { |
| 195 | return put_user(val, (int __user *)arg); |
| 196 | } |
| 197 | |
Martin K. Petersen | ac481c2 | 2009-10-03 20:52:01 +0200 | [diff] [blame] | 198 | static int put_uint(unsigned long arg, unsigned int val) |
| 199 | { |
| 200 | return put_user(val, (unsigned int __user *)arg); |
| 201 | } |
| 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | static int put_long(unsigned long arg, long val) |
| 204 | { |
| 205 | return put_user(val, (long __user *)arg); |
| 206 | } |
| 207 | |
| 208 | static int put_ulong(unsigned long arg, unsigned long val) |
| 209 | { |
| 210 | return put_user(val, (unsigned long __user *)arg); |
| 211 | } |
| 212 | |
| 213 | static int put_u64(unsigned long arg, u64 val) |
| 214 | { |
| 215 | return put_user(val, (u64 __user *)arg); |
| 216 | } |
| 217 | |
Al Viro | 633a08b | 2007-08-29 20:34:12 -0400 | [diff] [blame] | 218 | int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, |
| 219 | unsigned cmd, unsigned long arg) |
| 220 | { |
| 221 | struct gendisk *disk = bdev->bd_disk; |
Al Viro | d4430d6 | 2008-03-02 09:09:22 -0500 | [diff] [blame] | 222 | |
| 223 | if (disk->fops->ioctl) |
| 224 | return disk->fops->ioctl(bdev, mode, cmd, arg); |
| 225 | |
Al Viro | 633a08b | 2007-08-29 20:34:12 -0400 | [diff] [blame] | 226 | return -ENOTTY; |
| 227 | } |
| 228 | /* |
| 229 | * For the record: _GPL here is only because somebody decided to slap it |
| 230 | * on the previous export. Sheer idiocy, since it wasn't copyrightable |
| 231 | * at all and could be open-coded without any exports by anybody who cares. |
| 232 | */ |
| 233 | EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl); |
| 234 | |
Arnd Bergmann | f58c4c0 | 2007-10-09 13:23:51 +0200 | [diff] [blame] | 235 | /* |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 236 | * Is it an unrecognized ioctl? The correct returns are either |
| 237 | * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a |
| 238 | * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl |
| 239 | * code before returning. |
| 240 | * |
| 241 | * Confused drivers sometimes return EINVAL, which is wrong. It |
| 242 | * means "I understood the ioctl command, but the parameters to |
| 243 | * it were wrong". |
| 244 | * |
| 245 | * We should aim to just fix the broken drivers, the EINVAL case |
| 246 | * should go away. |
| 247 | */ |
| 248 | static inline int is_unrecognized_ioctl(int ret) |
| 249 | { |
| 250 | return ret == -EINVAL || |
| 251 | ret == -ENOTTY || |
| 252 | ret == -ENOIOCTLCMD; |
| 253 | } |
| 254 | |
| 255 | /* |
Arnd Bergmann | 8a6cfeb | 2010-07-08 10:18:46 +0200 | [diff] [blame] | 256 | * always keep this in sync with compat_blkdev_ioctl() |
Arnd Bergmann | f58c4c0 | 2007-10-09 13:23:51 +0200 | [diff] [blame] | 257 | */ |
Al Viro | 56b26ad | 2008-09-19 03:17:36 -0400 | [diff] [blame] | 258 | int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 259 | unsigned long arg) |
| 260 | { |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 261 | struct gendisk *disk = bdev->bd_disk; |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 262 | struct backing_dev_info *bdi; |
| 263 | loff_t size; |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 264 | int ret, n; |
| 265 | |
| 266 | switch(cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | case BLKFLSBUF: |
| 268 | if (!capable(CAP_SYS_ADMIN)) |
| 269 | return -EACCES; |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 270 | |
Al Viro | e436fda | 2008-09-18 03:38:12 -0400 | [diff] [blame] | 271 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 272 | if (!is_unrecognized_ioctl(ret)) |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 273 | return ret; |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | fsync_bdev(bdev); |
Peter Zijlstra | f98393a | 2007-05-06 14:49:54 -0700 | [diff] [blame] | 276 | invalidate_bdev(bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return 0; |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | case BLKROSET: |
Al Viro | e436fda | 2008-09-18 03:38:12 -0400 | [diff] [blame] | 280 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 281 | if (!is_unrecognized_ioctl(ret)) |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 282 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (!capable(CAP_SYS_ADMIN)) |
| 284 | return -EACCES; |
| 285 | if (get_user(n, (int __user *)(arg))) |
| 286 | return -EFAULT; |
| 287 | set_device_ro(bdev, n); |
| 288 | return 0; |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 289 | |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 290 | case BLKDISCARD: |
| 291 | case BLKSECDISCARD: { |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 292 | uint64_t range[2]; |
| 293 | |
Al Viro | e436fda | 2008-09-18 03:38:12 -0400 | [diff] [blame] | 294 | if (!(mode & FMODE_WRITE)) |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 295 | return -EBADF; |
| 296 | |
| 297 | if (copy_from_user(range, (void __user *)arg, sizeof(range))) |
| 298 | return -EFAULT; |
| 299 | |
Adrian Hunter | 8d57a98 | 2010-08-11 14:17:49 -0700 | [diff] [blame] | 300 | return blk_ioctl_discard(bdev, range[0], range[1], |
| 301 | cmd == BLKSECDISCARD); |
David Woodhouse | d30a260 | 2008-08-11 15:58:42 +0100 | [diff] [blame] | 302 | } |
| 303 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 304 | case HDIO_GETGEO: { |
| 305 | struct hd_geometry geo; |
| 306 | |
| 307 | if (!arg) |
| 308 | return -EINVAL; |
| 309 | if (!disk->fops->getgeo) |
| 310 | return -ENOTTY; |
| 311 | |
| 312 | /* |
| 313 | * We need to set the startsect first, the driver may |
| 314 | * want to override it. |
| 315 | */ |
Vasiliy Kulikov | a014741 | 2010-11-08 14:42:40 +0100 | [diff] [blame] | 316 | memset(&geo, 0, sizeof(geo)); |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 317 | geo.start = get_start_sect(bdev); |
| 318 | ret = disk->fops->getgeo(bdev, &geo); |
| 319 | if (ret) |
| 320 | return ret; |
| 321 | if (copy_to_user((struct hd_geometry __user *)arg, &geo, |
| 322 | sizeof(geo))) |
| 323 | return -EFAULT; |
| 324 | return 0; |
| 325 | } |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 326 | case BLKRAGET: |
| 327 | case BLKFRAGET: |
| 328 | if (!arg) |
| 329 | return -EINVAL; |
| 330 | bdi = blk_get_backing_dev_info(bdev); |
| 331 | if (bdi == NULL) |
| 332 | return -ENOTTY; |
| 333 | return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); |
| 334 | case BLKROGET: |
| 335 | return put_int(arg, bdev_read_only(bdev) != 0); |
Martin K. Petersen | ac481c2 | 2009-10-03 20:52:01 +0200 | [diff] [blame] | 336 | case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 337 | return put_int(arg, block_size(bdev)); |
Martin K. Petersen | ac481c2 | 2009-10-03 20:52:01 +0200 | [diff] [blame] | 338 | case BLKSSZGET: /* get block device logical block size */ |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 339 | return put_int(arg, bdev_logical_block_size(bdev)); |
Martin K. Petersen | ac481c2 | 2009-10-03 20:52:01 +0200 | [diff] [blame] | 340 | case BLKPBSZGET: /* get block device physical block size */ |
| 341 | return put_uint(arg, bdev_physical_block_size(bdev)); |
| 342 | case BLKIOMIN: |
| 343 | return put_uint(arg, bdev_io_min(bdev)); |
| 344 | case BLKIOOPT: |
| 345 | return put_uint(arg, bdev_io_opt(bdev)); |
| 346 | case BLKALIGNOFF: |
| 347 | return put_int(arg, bdev_alignment_offset(bdev)); |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 348 | case BLKDISCARDZEROES: |
| 349 | return put_uint(arg, bdev_discard_zeroes_data(bdev)); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 350 | case BLKSECTGET: |
Martin K. Petersen | ae03bf6 | 2009-05-22 17:17:50 -0400 | [diff] [blame] | 351 | return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev))); |
Martin K. Petersen | ef00f59 | 2012-01-11 16:29:31 +0100 | [diff] [blame] | 352 | case BLKROTATIONAL: |
| 353 | return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev))); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 354 | case BLKRASET: |
| 355 | case BLKFRASET: |
| 356 | if(!capable(CAP_SYS_ADMIN)) |
| 357 | return -EACCES; |
| 358 | bdi = blk_get_backing_dev_info(bdev); |
| 359 | if (bdi == NULL) |
| 360 | return -ENOTTY; |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 361 | bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 362 | return 0; |
| 363 | case BLKBSZSET: |
| 364 | /* set the logical block size */ |
| 365 | if (!capable(CAP_SYS_ADMIN)) |
| 366 | return -EACCES; |
| 367 | if (!arg) |
| 368 | return -EINVAL; |
| 369 | if (get_user(n, (int __user *) arg)) |
| 370 | return -EFAULT; |
Miklos Szeredi | 3c522ce | 2011-02-24 15:45:41 +0100 | [diff] [blame] | 371 | if (!(mode & FMODE_EXCL)) { |
| 372 | bdgrab(bdev); |
| 373 | if (blkdev_get(bdev, mode | FMODE_EXCL, &bdev) < 0) |
| 374 | return -EBUSY; |
| 375 | } |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 376 | ret = set_blocksize(bdev, n); |
Al Viro | 6af3a56 | 2008-09-19 03:08:13 -0400 | [diff] [blame] | 377 | if (!(mode & FMODE_EXCL)) |
Tejun Heo | e525fd8 | 2010-11-13 11:55:17 +0100 | [diff] [blame] | 378 | blkdev_put(bdev, mode | FMODE_EXCL); |
Arnd Bergmann | bb93e3a | 2005-06-23 00:10:15 -0700 | [diff] [blame] | 379 | return ret; |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 380 | case BLKPG: |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 381 | ret = blkpg_ioctl(bdev, (struct blkpg_ioctl_arg __user *) arg); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 382 | break; |
| 383 | case BLKRRPART: |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 384 | ret = blkdev_reread_part(bdev); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 385 | break; |
| 386 | case BLKGETSIZE: |
Mike Snitzer | 77304d2 | 2010-11-08 14:39:12 +0100 | [diff] [blame] | 387 | size = i_size_read(bdev->bd_inode); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 388 | if ((size >> 9) > ~0UL) |
| 389 | return -EFBIG; |
| 390 | return put_ulong(arg, size >> 9); |
| 391 | case BLKGETSIZE64: |
Mike Snitzer | 77304d2 | 2010-11-08 14:39:12 +0100 | [diff] [blame] | 392 | return put_u64(arg, i_size_read(bdev->bd_inode)); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 393 | case BLKTRACESTART: |
| 394 | case BLKTRACESTOP: |
| 395 | case BLKTRACESETUP: |
| 396 | case BLKTRACETEARDOWN: |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 397 | ret = blk_trace_ioctl(bdev, cmd, (char __user *) arg); |
Al Viro | 45048d0 | 2008-09-18 15:53:24 -0400 | [diff] [blame] | 398 | break; |
| 399 | default: |
| 400 | ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
| 401 | } |
| 402 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
Stephen Tweedie | 68f66fe | 2005-05-13 23:31:19 -0400 | [diff] [blame] | 404 | EXPORT_SYMBOL_GPL(blkdev_ioctl); |