On 5/23/18 3:19 AM, Maurizio Lombardi wrote:
>
>
> Dne 22.5.2018 v 16:47 Jens Axboe napsal(a):
>> It's been many years, but back in the day the program writing the cd
>> would eject the disc once done. This of course forces a reload of
>> the toc and clearing of the flag. What program is this? Seems like
>> it should probably eject when it's done.
>
> They are using wodim to burn the CDs on their servers.
> The problem is that they do not want the CD to be ejected because their drives
> lack a motorized tray, thus requiring manual intervention which they would
> like to avoid.
I took a quick look at it, man that sr driver needs a bit of love :-)
Anyway, I wonder if something like the below would work. Check for
a close track command in the sr completion handler, and flag the media
as changed if we see one. Totally untested...
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 3f3cb72e0c0c..48f0d7a096db 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -328,6 +328,9 @@ static int sr_done(struct scsi_cmnd *SCpnt)
scmd_printk(KERN_INFO, SCpnt, "done: %x\n", result);
#endif
+ if (SCpnt->cmnd[0] == GPCMD_CLOSE_TRACK)
+ cd->device->changed = 1;
+
/*
* Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial
* success. Since this is a relatively rare error condition, no
--
Jens Axboe
