[PATCH] introduce __blkdev_driver_ioctl()
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>
diff --git a/block/ioctl.c b/block/ioctl.c
index 38bee32..9a26ace 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -283,6 +283,37 @@
}
EXPORT_SYMBOL_GPL(blkdev_driver_ioctl);
+int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned cmd, unsigned long arg)
+{
+ struct gendisk *disk = bdev->bd_disk;
+ int ret;
+ /* you bet it'll go away by the end of patch series */
+ struct file fake_file = {};
+ struct dentry fake_dentry = {};
+ fake_file.f_mode = mode;
+ fake_file.f_path.dentry = &fake_dentry;
+ fake_dentry.d_inode = bdev->bd_inode;
+
+ if (disk->fops->unlocked_ioctl)
+ return disk->fops->unlocked_ioctl(&fake_file, cmd, arg);
+
+ if (disk->fops->ioctl) {
+ lock_kernel();
+ ret = disk->fops->ioctl(bdev->bd_inode, &fake_file, cmd, arg);
+ unlock_kernel();
+ return ret;
+ }
+
+ return -ENOTTY;
+}
+/*
+ * For the record: _GPL here is only because somebody decided to slap it
+ * on the previous export. Sheer idiocy, since it wasn't copyrightable
+ * at all and could be open-coded without any exports by anybody who cares.
+ */
+EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
+
/*
* always keep this in sync with compat_blkdev_ioctl() and
* compat_blkdev_locked_ioctl()
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index bdd49ab..a0ba402 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2819,8 +2819,8 @@
case CDROM_LAST_WRITTEN:
case CDROM_SEND_PACKET:
case SCSI_IOCTL_SEND_COMMAND:
- return blkdev_driver_ioctl(pd->bdev->bd_inode, pd->bdev->bd_disk,
- file, cmd, arg);
+ return __blkdev_driver_ioctl(pd->bdev, file ? file->f_mode : 0,
+ cmd, arg);
default:
VPRINTK(DRIVER_NAME": Unknown ioctl for %s (%x)\n", pd->name, cmd);
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index fa35838..373442b 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -114,15 +114,7 @@
unsigned long arg)
{
struct linear_c *lc = (struct linear_c *) ti->private;
- struct block_device *bdev = lc->dev->bdev;
- struct file fake_file = {};
- struct dentry fake_dentry = {};
-
- fake_file.f_mode = lc->dev->mode;
- fake_file.f_path.dentry = &fake_dentry;
- fake_dentry.d_inode = bdev->bd_inode;
-
- return blkdev_driver_ioctl(bdev->bd_inode, &fake_file, bdev->bd_disk, cmd, arg);
+ return __blkdev_driver_ioctl(lc->dev->bdev, lc->dev->mode, cmd, arg);
}
static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index c681d5e..d85c65a 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1400,13 +1400,10 @@
{
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 @@
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 @@
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);
}
/*-----------------------------------------------------------------
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 48ec886..2bad616 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1074,6 +1074,8 @@
struct module *owner;
};
+extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
+ unsigned long);
#else /* CONFIG_BLOCK */
/*
* stubs for when the block layer is configured out
