[PATCH] Add block_device_operations.getgeo block device method
HDIO_GETGEO is implemented in most block drivers, and all of them have to
duplicate the code to copy the structure to userspace, as well as getting
the start sector. This patch moves that to common code [1] and adds a
->getgeo method to fill out the raw kernel hd_geometry structure. For many
drivers this means ->ioctl can go away now.
[1] the s390 block drivers are odd in this respect. xpram sets ->start
to 4 always which seems more than odd, and the dasd driver shifts
the start offset around, probably because of it's non-standard
sector size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@suse.de>
Cc: <mike.miller@hp.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/acorn/block/mfmhd.c b/drivers/acorn/block/mfmhd.c
index 4b65f74..ce074f6 100644
--- a/drivers/acorn/block/mfmhd.c
+++ b/drivers/acorn/block/mfmhd.c
@@ -129,19 +129,6 @@
#define MAJOR_NR MFM_ACORN_MAJOR
#define QUEUE (mfm_queue)
#define CURRENT elv_next_request(mfm_queue)
-/*
- * This sort of stuff should be in a header file shared with ide.c, hd.c, xd.c etc
- */
-#ifndef HDIO_GETGEO
-#define HDIO_GETGEO 0x301
-struct hd_geometry {
- unsigned char heads;
- unsigned char sectors;
- unsigned short cylinders;
- unsigned long start;
-};
-#endif
-
/*
* Configuration section
@@ -1153,22 +1140,13 @@
* The 'front' end of the mfm driver follows...
*/
-static int mfm_ioctl(struct inode *inode, struct file *file, u_int cmd, u_long arg)
+static int mfm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
- struct mfm_info *p = inode->i_bdev->bd_disk->private_data;
- struct hd_geometry *geo = (struct hd_geometry *) arg;
- if (cmd != HDIO_GETGEO)
- return -EINVAL;
- if (!arg)
- return -EINVAL;
- if (put_user (p->heads, &geo->heads))
- return -EFAULT;
- if (put_user (p->sectors, &geo->sectors))
- return -EFAULT;
- if (put_user (p->cylinders, &geo->cylinders))
- return -EFAULT;
- if (put_user (get_start_sect(inode->i_bdev), &geo->start))
- return -EFAULT;
+ struct mfm_info *p = bdev->bd_disk->private_data;
+
+ geo->heads = p->heads;
+ geo->sectors = p->sectors;
+ geo->cylinders = p->cylinders;
return 0;
}
@@ -1219,7 +1197,7 @@
static struct block_device_operations mfm_fops =
{
.owner = THIS_MODULE,
- .ioctl = mfm_ioctl,
+ .getgeo = mfm_getgeo,
};
/*