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authorMartin K. Petersen <martin.petersen@oracle.com>2012-01-11 16:29:31 +0100
committerJens Axboe <axboe@kernel.dk>2012-01-11 16:29:31 +0100
commitef00f59c95fe6e002e7c6e3663cdea65e253f4cc (patch)
tree8e84273162b7a743767098cc08b6c6eb2b041281 /block/ioctl.c
parentb1bd055d397e09f99dcef9b138ed104ff1812fcb (diff)
downloadlinux-ef00f59c95fe6e002e7c6e3663cdea65e253f4cc.tar.gz
block: Add BLKROTATIONAL ioctl
Introduce an ioctl which permits applications to query whether a block device is rotational. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/ioctl.c')
-rw-r--r--block/ioctl.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index ca939fc1030..337d207ab14 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -278,6 +278,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
return put_uint(arg, bdev_discard_zeroes_data(bdev));
case BLKSECTGET:
return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
+ case BLKROTATIONAL:
+ return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev)));
case BLKRASET:
case BLKFRASET:
if(!capable(CAP_SYS_ADMIN))