Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=135da0b037984c0284acdf40aaf4f7f31eb5cbd0 Commit: 135da0b037984c0284acdf40aaf4f7f31eb5cbd0 Parent: 6c0cd7c000dc0851035c5003bf9d47733d0b257b Author: Christian Borntraeger <[EMAIL PROTECTED]> AuthorDate: Wed Jan 23 17:56:50 2008 +0100 Committer: Rusty Russell <[EMAIL PROTECTED]> CommitDate: Mon Feb 4 23:50:09 2008 +1100
virtio_blk: provide getgeo Rusty, I currently try to make my guest boot from an virtio root device without having an external kernel. Some of the tools that I tried expect HDIO_GETGEO to work. The most interesting value is likely the geo.start value to get the offset of a partition. This value is filled by block/ioctl.c if fops->getgeo is set. This patch also fills in some standard values for heads, sectors and cylinders. Makes sense? Signed-off-by: Christian Borntraeger <[EMAIL PROTECTED]> Signed-off-by: Rusty Russell <[EMAIL PROTECTED]> --- drivers/block/virtio_blk.c | 15 +++++++++++++-- 1 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 6143337..d2fe679 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -152,9 +152,20 @@ static int virtblk_ioctl(struct inode *inode, struct file *filp, (void __user *)data); } +/* We provide getgeo only to please some old bootloader/partitioning tools */ +static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo) +{ + /* some standard values, similar to sd */ + geo->heads = 1 << 6; + geo->sectors = 1 << 5; + geo->cylinders = get_capacity(bd->bd_disk) >> 11; + return 0; +} + static struct block_device_operations virtblk_fops = { - .ioctl = virtblk_ioctl, - .owner = THIS_MODULE, + .ioctl = virtblk_ioctl, + .owner = THIS_MODULE, + .getgeo = virtblk_getgeo, }; static int virtblk_probe(struct virtio_device *vdev) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html