diff options
| -rw-r--r-- | drivers/block/virtio_blk.c | 37 | ||||
| -rw-r--r-- | include/linux/virtio_blk.h | 4 |
2 files changed, 38 insertions, 3 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index c4845b169464..c0facaa55cf4 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -171,11 +171,43 @@ 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 int virtblk_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long data) { 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. @@ -183,8 +215,7 @@ static int virtblk_ioctl(struct block_device *bdev, fmode_t mode, if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI)) return -ENOIOCTLCMD; - return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, - (void __user *)data); + return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); } /* We provide getgeo only to please some old bootloader/partitioning tools */ @@ -390,7 +421,7 @@ 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_SCSI, VIRTIO_BLK_F_IDENTIFY }; static struct virtio_driver virtio_blk = { diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h index 4dbcbc1c3481..be7d255fc7cf 100644 --- a/include/linux/virtio_blk.h +++ b/include/linux/virtio_blk.h @@ -16,6 +16,9 @@ #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_ID_BYTES (sizeof(__u16[256])) /* IDENTIFY DATA */ struct virtio_blk_config { @@ -33,6 +36,7 @@ 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)); /* These two define direction. */ |