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[PATCH] introduce __blkdev_driver_ioctl()

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Analog of blkdev_driver_ioctl() with sane arguments.  For
now uses fake struct file, by the end of the series it won't
and blkdev_driver_ioctl() will become a wrapper around it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2007-08-29 20:34:12 -04:00
parent a0eb62a0a4
commit 633a08b812
5 changed files with 39 additions and 19 deletions
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11
drivers/md/dm-mpath.c
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@@ -1400,13 +1400,10 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd,
{
struct multipath *m = (struct multipath *) ti->private;
struct block_device *bdev = NULL;
fmode_t mode = 0;
unsigned long flags;
struct file fake_file = {};
struct dentry fake_dentry = {};
int r = 0;
fake_file.f_path.dentry = &fake_dentry;
spin_lock_irqsave(&m->lock, flags);
if (!m->current_pgpath)
@@ -1414,8 +1411,7 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd,
if (m->current_pgpath) {
bdev = m->current_pgpath->path.dev->bdev;
fake_dentry.d_inode = bdev->bd_inode;
fake_file.f_mode = m->current_pgpath->path.dev->mode;
mode = m->current_pgpath->path.dev->mode;
}
if (m->queue_io)
@@ -1425,8 +1421,7 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd,
spin_unlock_irqrestore(&m->lock, flags);
return r ? : blkdev_driver_ioctl(bdev->bd_inode, &fake_file,
bdev->bd_disk, cmd, arg);
return r ? : __blkdev_driver_ioctl(bdev, mode, cmd, arg);
}
/*-----------------------------------------------------------------