2014-02-28 18:55:27 +01:00
|
|
|
From a14f14976094650e17d39f3a7d15a1c68c93c333 Mon Sep 17 00:00:00 2001
|
|
|
|
|
From: Lukas Nykryn <lnykryn@redhat.com>
|
|
|
|
|
Date: Thu, 27 Feb 2014 11:06:37 +0100
|
|
|
|
|
Subject: [PATCH] cdrom_id: use the old MMC fallback
|
|
|
|
|
|
|
|
|
|
https://bugzilla.redhat.com/show_bug.cgi?id=1038015
|
|
|
|
|
The problem seems to be that the your virtual DVD is emulating a really
|
|
|
|
|
old DVD device, and doing it kind of strangely.
|
|
|
|
|
|
|
|
|
|
> dracut:# /lib/udev/cdrom_id --debug /dev/sr0
|
|
|
|
|
> probing: '/dev/sr0'
|
|
|
|
|
> INQUIRY: [IMM ][Virtual CD/DVD ][0316]
|
|
|
|
|
> GET CONFIGURATION failed with SK=5h/ASC=24h/ACQ=00h
|
|
|
|
|
|
|
|
|
|
So your virtual drive rejects the GET CONFIGURATION command as illegal.
|
|
|
|
|
|
|
|
|
|
Other pre-MMC2 drives that don't accept this command usually return the
|
|
|
|
|
error
|
|
|
|
|
SK=5h,ASC=20h (invalid/unsupported command code), in which case cdrom_id
|
|
|
|
|
tries an older method, and then ID_CDROM_MEDIA_TRACK_COUNT_DATA gets set
|
|
|
|
|
and all the /dev/disk/by-label (etc) links get set up.
|
|
|
|
|
|
|
|
|
|
The virtual drive returns the error SK=5h,ASC=24h (invalid field in
|
|
|
|
|
Command Descriptor Block), which cdrom_id doesn't handle, so it gives up
|
|
|
|
|
and the links never get made.
|
|
|
|
|
|
|
|
|
|
The ideal solution would be to make the IMM to emulate a device that's
|
|
|
|
|
less than 15 years old, but I'm not going to hold my breath waiting for
|
|
|
|
|
that.
|
|
|
|
|
|
|
|
|
|
So probably cdrom_id should also use the old MMC fallback when the error
|
|
|
|
|
is SK=5h,ASC=24h, and then all of this would work as expected.
|
|
|
|
|
|
|
|
|
|
Suggested-by:Luca Miccini <lmiccini@redhat.com>
|
|
|
|
|
---
|
|
|
|
|
src/udev/cdrom_id/cdrom_id.c | 2 +-
|
|
|
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
|
|
|
|
|
|
diff --git src/udev/cdrom_id/cdrom_id.c src/udev/cdrom_id/cdrom_id.c
|
|
|
|
|
index 93467c2..33b2bc3 100644
|
2014-04-10 11:06:04 +02:00
|
|
|
--- a/src/udev/cdrom_id/cdrom_id.c
|
|
|
|
|
+++ b/src/udev/cdrom_id/cdrom_id.c
|
2014-02-28 18:55:27 +01:00
|
|
|
@@ -556,7 +556,7 @@ static int cd_profiles(struct udev *udev, int fd)
|
|
|
|
|
if ((err != 0)) {
|
|
|
|
|
info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
|
|
|
|
|
/* handle pre-MMC2 drives which do not support GET CONFIGURATION */
|
|
|
|
|
- if (SK(err) == 0x5 && ASC(err) == 0x20) {
|
|
|
|
|
+ if (SK(err) == 0x5 && (ASC(err) == 0x20 || ASC(err) == 0x24)) {
|
|
|
|
|
log_debug("drive is pre-MMC2 and does not support 46h get configuration command");
|
|
|
|
|
log_debug("trying to work around the problem");
|
|
|
|
|
ret = cd_profiles_old_mmc(udev, fd);
|
|
|
|
|
--
|
|
|
|
|
1.7.9.2
|
|
|
|
|
|
