Re: [Qemu-devel] [PATCH] scsi: Handle no media case for scsi_get_configuration

[Paolo Bonzini <pbonzini@redhat.com>]

On 22/07/2015 16:15, Matthew Rosato wrote:
> On 07/15/2015 02:52 PM, Matthew Rosato wrote:
>> Currently, scsi_get_configuration always returns a current
>> profile (DVD or CD), even when there is actually no media present.
>> By comparison, ide/atapi uses a default profile of 0 (MMC_PROFILE_NONE)
>> for this case and checks for tray_open, so let's do the same for scsi.
>>
>> This fixes a problem I'm seeing with Fedora 22 guests where systemd
>> cdrom_id fails to unmount after a QEMU-initiated eject against a
>> scsi cdrom device because it believes the media is still present
>> (but unreadable).
>>
>> Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
> 
> Ping

The patch looks good.  Would you like it in 2.4?

Paolo

>> ---
>>  hw/scsi/scsi-disk.c | 16 +++++++++++++++-
>>  1 file changed, 15 insertions(+), 1 deletion(-)
>>
>> diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
>> index 54d71f4..64f0694 100644
>> --- a/hw/scsi/scsi-disk.c
>> +++ b/hw/scsi/scsi-disk.c
>> @@ -765,6 +765,9 @@ static inline bool media_is_dvd(SCSIDiskState *s)
>>      if (!blk_is_inserted(s->qdev.conf.blk)) {
>>          return false;
>>      }
>> +    if (s->tray_open) {
>> +        return false;
>> +    }
>>      blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
>>      return nb_sectors > CD_MAX_SECTORS;
>>  }
>> @@ -778,6 +781,9 @@ static inline bool media_is_cd(SCSIDiskState *s)
>>      if (!blk_is_inserted(s->qdev.conf.blk)) {
>>          return false;
>>      }
>> +    if (s->tray_open) {
>> +        return false;
>> +    }
>>      blk_get_geometry(s->qdev.conf.blk, &nb_sectors);
>>      return nb_sectors <= CD_MAX_SECTORS;
>>  }
>> @@ -975,7 +981,15 @@ static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
>>      if (s->qdev.type != TYPE_ROM) {
>>          return -1;
>>      }
>> -    current = media_is_dvd(s) ? MMC_PROFILE_DVD_ROM : MMC_PROFILE_CD_ROM;
>> +
>> +    if (media_is_dvd(s)) {
>> +        current = MMC_PROFILE_DVD_ROM;
>> +    } else if (media_is_cd(s)) {
>> +        current = MMC_PROFILE_CD_ROM;
>> +    } else {
>> +        current = MMC_PROFILE_NONE;
>> +    }
>> +
>>      memset(outbuf, 0, 40);
>>      stl_be_p(&outbuf[0], 36); /* Bytes after the data length field */
>>      stw_be_p(&outbuf[6], current);
>>
> 
> 
>