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[PATCH] dm linear: support ioctls 

When an ioctl is performed on a device with a linear target, simply pass it on
to the underlying block device.

Note that the ioctl will pass through the filtering in blkdev_ioctl() twice.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Milan Broz 2006-10-03 01:15:18 -07:00 committed by Linus Torvalds
parent aa129a2247
commit ab17ffa440
1 changed files with 12 additions and 1 deletions
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13
drivers/md/dm-linear.c
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@ -98,14 +98,25 @@ static int linear_status(struct dm_target *ti, status_type_t type,
return 0; return 0;
} }
static int linear_ioctl(struct dm_target *ti, struct inode *inode,
struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct linear_c *lc = (struct linear_c *) ti->private;
struct block_device *bdev = lc->dev->bdev;
return blkdev_ioctl(bdev->bd_inode, filp, cmd, arg);
}
static struct target_type linear_target = { static struct target_type linear_target = {
.name = "linear", .name = "linear",
.version= {1, 0, 1}, .version= {1, 0, 2},
.module = THIS_MODULE, .module = THIS_MODULE,
.ctr = linear_ctr, .ctr = linear_ctr,
.dtr = linear_dtr, .dtr = linear_dtr,
.map = linear_map, .map = linear_map,
.status = linear_status, .status = linear_status,
.ioctl = linear_ioctl,
}; };
int __init dm_linear_init(void) int __init dm_linear_init(void)