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virtio_blk: Revert serial number support

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This reverts "Add serial number support for virtio_blk, V4a".

Turns out that virtio_pci, lguest and s/390 all have an 8 bit limit
on virtio config space, so noone could ever use this.

This is coming back later in a cleaner form.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: john cooper <john.cooper@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Rusty Russell 2009-10-22 16:39:28 -06:00
parent e95646c3ec
commit 3225beaba0
2 changed files with 3 additions and 38 deletions
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37
drivers/block/virtio_blk.c
View file

@ -182,34 +182,6 @@ static void do_virtblk_request(struct request_queue *q)
vblk->vq->vq_ops->kick(vblk->vq);
}
/* return ATA identify data
*/
static int virtblk_identify(struct gendisk *disk, void *argp)
{
struct virtio_blk *vblk = disk->private_data;
void *opaque;
int err = -ENOMEM;
opaque = kmalloc(VIRTIO_BLK_ID_BYTES, GFP_KERNEL);
if (!opaque)
goto out;
err = virtio_config_buf(vblk->vdev, VIRTIO_BLK_F_IDENTIFY,
offsetof(struct virtio_blk_config, identify), opaque,
VIRTIO_BLK_ID_BYTES);
if (err)
goto out_kfree;
if (copy_to_user(argp, opaque, VIRTIO_BLK_ID_BYTES))
err = -EFAULT;
out_kfree:
kfree(opaque);
out:
return err;
}
static void virtblk_prepare_flush(struct request_queue *q, struct request *req)
{
req->cmd_type = REQ_TYPE_LINUX_BLOCK;
@ -221,10 +193,6 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
{
struct gendisk *disk = bdev->bd_disk;
struct virtio_blk *vblk = disk->private_data;
void __user *argp = (void __user *)data;
if (cmd == HDIO_GET_IDENTITY)
return virtblk_identify(disk, argp);
/*
* Only allow the generic SCSI ioctls if the host can support it.
@ -232,7 +200,8 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
return -ENOTTY;
return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
return scsi_cmd_ioctl(disk->queue, disk, mode, cmd,
(void __user *)data);
}
/* We provide getgeo only to please some old bootloader/partitioning tools */
@ -443,7 +412,7 @@ static struct virtio_device_id id_table[] = {
static unsigned int features[] = {
VIRTIO_BLK_F_BARRIER, VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX,
VIRTIO_BLK_F_GEOMETRY, VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE,
VIRTIO_BLK_F_SCSI, VIRTIO_BLK_F_IDENTIFY, VIRTIO_BLK_F_FLUSH
VIRTIO_BLK_F_SCSI, VIRTIO_BLK_F_FLUSH
};
/*

4
include/linux/virtio_blk.h
View file

@ -14,11 +14,8 @@
#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/
#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
#define VIRTIO_BLK_F_IDENTIFY 8 /* ATA IDENTIFY supported */
#define VIRTIO_BLK_F_FLUSH 9 /* Cache flush command support */
#define VIRTIO_BLK_ID_BYTES (sizeof(__u16[256])) /* IDENTIFY DATA */
struct virtio_blk_config {
/* The capacity (in 512-byte sectors). */
__u64 capacity;
@ -34,7 +31,6 @@ struct virtio_blk_config {
} geometry;
/* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
__u32 blk_size;
__u8 identify[VIRTIO_BLK_ID_BYTES];
} __attribute__((packed));
/*