From a885c8c4316e1c1d2d2c8755da3f3d14f852528d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 8 Jan 2006 01:02:50 -0800 Subject: [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 Cc: Jens Axboe Cc: Cc: Jeff Dike Cc: Paolo Giarrusso Cc: Bartlomiej Zolnierkiewicz Cc: Neil Brown Cc: Markus Lidel Cc: Russell King Cc: David Woodhouse Cc: Martin Schwidefsky Cc: James Bottomley Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/DAC960.c | 35 ++++++++++++++--------------------- 1 file changed, 14 insertions(+), 21 deletions(-) (limited to 'drivers/block/DAC960.c') diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c index 21097a39a057..179c68a3cef3 100644 --- a/drivers/block/DAC960.c +++ b/drivers/block/DAC960.c @@ -92,34 +92,28 @@ static int DAC960_open(struct inode *inode, struct file *file) return 0; } -static int DAC960_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static int DAC960_getgeo(struct block_device *bdev, struct hd_geometry *geo) { - struct gendisk *disk = inode->i_bdev->bd_disk; + struct gendisk *disk = bdev->bd_disk; DAC960_Controller_T *p = disk->queue->queuedata; int drive_nr = (long)disk->private_data; - struct hd_geometry g; - struct hd_geometry __user *loc = (struct hd_geometry __user *)arg; - - if (cmd != HDIO_GETGEO || !loc) - return -EINVAL; if (p->FirmwareType == DAC960_V1_Controller) { - g.heads = p->V1.GeometryTranslationHeads; - g.sectors = p->V1.GeometryTranslationSectors; - g.cylinders = p->V1.LogicalDriveInformation[drive_nr]. - LogicalDriveSize / (g.heads * g.sectors); + geo->heads = p->V1.GeometryTranslationHeads; + geo->sectors = p->V1.GeometryTranslationSectors; + geo->cylinders = p->V1.LogicalDriveInformation[drive_nr]. + LogicalDriveSize / (geo->heads * geo->sectors); } else { DAC960_V2_LogicalDeviceInfo_T *i = p->V2.LogicalDeviceInformation[drive_nr]; switch (i->DriveGeometry) { case DAC960_V2_Geometry_128_32: - g.heads = 128; - g.sectors = 32; + geo->heads = 128; + geo->sectors = 32; break; case DAC960_V2_Geometry_255_63: - g.heads = 255; - g.sectors = 63; + geo->heads = 255; + geo->sectors = 63; break; default: DAC960_Error("Illegal Logical Device Geometry %d\n", @@ -127,12 +121,11 @@ static int DAC960_ioctl(struct inode *inode, struct file *file, return -EINVAL; } - g.cylinders = i->ConfigurableDeviceSize / (g.heads * g.sectors); + geo->cylinders = i->ConfigurableDeviceSize / + (geo->heads * geo->sectors); } - g.start = get_start_sect(inode->i_bdev); - - return copy_to_user(loc, &g, sizeof g) ? -EFAULT : 0; + return 0; } static int DAC960_media_changed(struct gendisk *disk) @@ -157,7 +150,7 @@ static int DAC960_revalidate_disk(struct gendisk *disk) static struct block_device_operations DAC960_BlockDeviceOperations = { .owner = THIS_MODULE, .open = DAC960_open, - .ioctl = DAC960_ioctl, + .getgeo = DAC960_getgeo, .media_changed = DAC960_media_changed, .revalidate_disk = DAC960_revalidate_disk, }; -- cgit v1.2.1