Add virtio disk identification ioctl (234f2725) · Commits · 戴 / test

Return serial string to the guest application via ioctl driver call. Note this form of interface to the guest userland was the consensus when the prior version using the ATA_IDENTIFY came under dispute. Signed-off-by:

john cooper <john.cooper@redhat.com> Signed-off-by:

Rusty Russell <rusty@rustcorp.com.au>

drivers/block/virtio_blk.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -225,6 +225,16 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
		struct gendisk *disk = bdev->bd_disk;
		struct virtio_blk *vblk = disk->private_data;

		if (cmd == 'VBID') {
		void __user usr_data = (void __user )data;
		char id_str[VIRTIO_BLK_ID_BYTES];
		int err;

		err = virtblk_get_id(disk, id_str);
		if (!err && copy_to_user(usr_data, id_str, VIRTIO_BLK_ID_BYTES))
		err = -EFAULT;
		return err;
		}
		/*
		* Only allow the generic SCSI ioctls if the host can support it.
		*/

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