From 597592d951cdca8e5edb29f7e8174f633a69685a Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Thu, 21 Feb 2008 13:03:45 -0800 Subject: [PATCH] xen: Implement getgeo for Xen virtual block device. The below implements the getgeo hook for Xen block devices. Extracted from the xen-unstable tree where it has been used for ages. It is useful to have because it allows things like grub2 (used by the Debian installer images) to work in a guest domain without having to sprinkle Xen specific hacks around the place. Signed-off-by: Ian Campbell Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Linus Torvalds --- drivers/block/xen-blkfront.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 8afce67c0aa5..9c6f3f99208d 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -37,6 +37,7 @@ #include #include +#include #include #include @@ -135,6 +136,22 @@ static void blkif_restart_queue_callback(void *arg) schedule_work(&info->work); } +int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg) +{ + /* We don't have real geometry info, but let's at least return + values consistent with the size of the device */ + sector_t nsect = get_capacity(bd->bd_disk); + sector_t cylinders = nsect; + + hg->heads = 0xff; + hg->sectors = 0x3f; + sector_div(cylinders, hg->heads * hg->sectors); + hg->cylinders = cylinders; + if ((sector_t)(hg->cylinders + 1) * hg->heads * hg->sectors < nsect) + hg->cylinders = 0xffff; + return 0; +} + /* * blkif_queue_request * @@ -937,6 +954,7 @@ static struct block_device_operations xlvbd_block_fops = .owner = THIS_MODULE, .open = blkif_open, .release = blkif_release, + .getgeo = blkif_getgeo, }; -- 2.34.1