diff options
| author | Christian Limpach <Christian.Limpach@xensource.com> | 2008-06-17 10:47:08 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-07-03 13:21:13 +0200 |
| commit | 440a01a7f46742400c74d9d346118523e81d188b (patch) | |
| tree | 7f79afef47dddad38b488c56e160d39ed034b0d5 /drivers/block | |
| parent | 1c91fe1a0d577f2e53475e789c9d63a0feb7d93c (diff) | |
xen/blkfront: Add the CDROM_GET_CAPABILITY ioctl to blkfront.
Return 0 instead of -EINVAL if the blkfront device is a cdrom,
i.e. had the VDISK_CDROM attribute. This allows udev's cdrom_id
to correctly detect the device as a cdrom device.
[ Add blkif_ioctl, and CDROMMULTISESSION ]
[ linux-2.6.18-xen changeset d2bd9af846b5 ]
Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/xen-blkfront.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index e8d3bf6f391..da3fee6bf53 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -38,6 +38,7 @@ #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/hdreg.h> +#include <linux/cdrom.h> #include <linux/module.h> #include <xen/xenbus.h> @@ -153,6 +154,40 @@ static int blkif_getgeo(struct block_device *bd, struct hd_geometry *hg) return 0; } +int blkif_ioctl(struct inode *inode, struct file *filep, + unsigned command, unsigned long argument) +{ + struct blkfront_info *info = + inode->i_bdev->bd_disk->private_data; + int i; + + dev_dbg(&info->xbdev->dev, "command: 0x%x, argument: 0x%lx\n", + command, (long)argument); + + switch (command) { + case CDROMMULTISESSION: + dev_dbg(&info->xbdev->dev, "FIXME: support multisession CDs later\n"); + for (i = 0; i < sizeof(struct cdrom_multisession); i++) + if (put_user(0, (char __user *)(argument + i))) + return -EFAULT; + return 0; + + case CDROM_GET_CAPABILITY: { + struct gendisk *gd = info->gd; + if (gd->flags & GENHD_FL_CD) + return 0; + return -EINVAL; + } + + default: + /*printk(KERN_ALERT "ioctl %08x not supported by Xen blkdev\n", + command);*/ + return -EINVAL; /* same return as native Linux */ + } + + return 0; +} + /* * blkif_queue_request * @@ -974,6 +1009,7 @@ static struct block_device_operations xlvbd_block_fops = .open = blkif_open, .release = blkif_release, .getgeo = blkif_getgeo, + .ioctl = blkif_ioctl, }; |