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If the disc is unreadable and reading of the first 32 blocks fails set the
cd_media status to 0 (not present). This will prevent udev from executing blkid
next that tries to determine fs on the disc and which in this case may seem to
hang forever locking the drive.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Some drives don't like huge feature buffers, so we query twice. First
run for the current profile and to get the length.
Second time we query the whole profile feature set.
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Read the first and last track from the TOC header, and do not go beyond that
stated number of tracks when reading the TOC. Otherwise we interpret random
data which leads to bogus tracks. (Reported on an IronKey, which reported 1
data track, and 4 audio tracks which weren't actually present.)
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Reportedly, some "when I'm grown up I want to be a CD drive" fake USB CD sticks
like the IronKey neither support the SCSI "GET CONFIGURATION" nor the older
(pre-MMC2) "READ DISC INFORMATION" command. In that case, check if
cd_media_compat() detected that there is a disc present, and assume that we
have a CD-ROM medium.
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Turns out we can do this much simpler by assuming that cd_media_compat() works,
which seems to be the case for the IronKey.
This reverts commit ea88774a922c734afd751a59d8102bfa4806a1a6.
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Reportedly, some "when I'm grown up I want to be a CD drive" fake USB CD sticks
like the IronKey neither support the SCSI "GET CONFIGURATION" nor the older
(pre-MMC2) "READ DISC INFORMATION" command. In that case, check if we can read
data from the drive, and assume that we have a CD-ROM medium if it succeeds.
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Reportedly, many CD drive firmwares will only consider the MSB in a READ
command, thus if we request 17 blocks to be read, we'll actually only get 16 in
many cases, and thus miss out the interesting sector #17. This would lead to
falsely considering nonempty DVDs as blank.
Fetch 32 blocks now, which should work everywhere.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Commit cf2205a19 applied the "restricted overwrite" vs. "sequential" DVD-RW
test to feature_profiles() (which reads the drive capabilities), which caused
every DVD medium to be detected as ID_CDROM_MEDIA_DVD_RW. Now apply it to
cd_profiles() instead, to just check the current profile.
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Commit cf2205a fixed the media status for fresh DVD-RW in restricted overwrite
mode, but missed a detail: We should not report the ID_CDROM_MEDIA_SESSION_NEXT
property either, since in that mode you can never append tracks/sessions; this
just works in sequential mode.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Show which media status the hardware originally reports, since we mangle it in
some cases.
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Fresh DVD-RW in restricted overwite mode reports itself as "appendable"; change
it to "blank" to make it consistent with what gets reported after blanking, and
what userspace expects.
For the exotic case where some uses multi-track recording on a DVD-RW in
sequential mode, we need to tell apart sequential and restricted overwrite
modes, so keep separate states for them internally.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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"other" is known to apply to DVD-RAMs, where sessions can't be appended.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Extend the DVD+RW/DVD-RAM check in commit 1ef6c9e to also cover DVD-RW, since
in "restricted overwrite" mode they behave similar to DVD+RW.
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Those do not yet support the 0x46 "GET CONFIGURATION" support. If we have
those, fall back to the 0x51 "READ DISC INFORMATION" call. This can only
differentiate between CD-RW and CD-R, but first that's better than a complete
detection failure, and second, those old drives likely don't support more
modern media in the first place.
https://launchpad.net/bugs/502143
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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Once formatted, DVD+RW and DVD-RAM discs are always reported "complete" by the
drive. Check the if the Volume Descriptor or Volume Descriptor Anchor sectors
are empty, and if so, set the status to blank. If the disc is unformatted the
blank status is maintained and no reads are issued. If the disc is formatted and
read command fails, the status remains set to complete to avoid accidental
blanking.
Bug-Ubuntu: https://launchpad.net/bugs/581925
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
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session media
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we cannot be sure for xvd*
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On Sat, Apr 17, 2010 at 18:26, Mike Brudevold <mike@brudevold.com> wrote:
> My CD-RW drive experiences a problem in that it automatically closes
> after opening if there is media in the drive. This only happens if
> there was media in the drive when it was last closed (an empty drive
> stays open).
...
> cd_profiles: current profile 0x02
> cd_profiles: profile 0x02 <ignored>
...
Do not pretend to have a media, when we receive a profile like 0x02,
which just means "Removable disk".
Thanks to Mike Brudevold for the initial patch.
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Signed-off-by: Mike Brudevold <mike@brudevold.com>
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Blank CDs do not have a TOC, thus will fail cd_media_toc() (at least with the
"Do not ignore errors from scsi_cmd_run()" fix). Thus probe the media state
first, so that we can properly detect blank media.
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scsi_cmd_run() can return positive error messages if we have CHECK_CONDITION
set and get the error code from the SCSI command result. So check the result
for non-zero, not for being negative.
This should fix another cause for "phantom" media in empty CD-ROM drives.
Thanks to Mike Brudevold <mike@brudevold.com> for spotting this!
https://launchpad.net/bugs/562978
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Commit 5c6954f is actually a no-op, since static variables are already zero'ed
by default anyway (but we keep it for clarity). The real difference was that a
build with -O0 wor while a build with -O2 didn't.
Turns out that some ioctls do not actually touch the result buffer in some
cases, so we need to zero the result buffers to avoid interpreting random da as
CD properties.
https://launchpad.net/bugs/559723
https://launchpad.net/bugs/561585
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In cases where cdrom_id does not go through the entire code path and one of the
probing functions returns -1 or exits early, the remaining variables were never
initialized. This caused effects like "phantom" audio CDs on empty drives, or
bogus data like ID_CDROM_MEDIA_TRACK_COUNT=22528.
Initialize the variables right away to avoid that.
Bug-Ubuntu: https://launchpad.net/bugs/559723
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Based on a patch from Harald Hoyer.
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We might fight about the device with polling processes, or other
users who probe the device. Retry a few times if the other one goes
away in the meantime.
Based on a patch from Harald Hoyer.
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This should prevent confusing drives during CD burning sessions. Based
on a patch from Harald Hoyer.
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Even when there is no medium in the drive, we should still check the
profiles supported by the drive. Otherwise we fail to detect things
like Blu-ray drives. See
https://bugzilla.gnome.org/show_bug.cgi?id=600273
for more information.
Signed-off-by: David Zeuthen <davidz@redhat.com>
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Fix spelling in docbook comments, code comments, and a local variable
name. Thanks to "ispell -h" for docbook HTML and "scspell" for source
code.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
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Instead of using multiple recursive Makefile.am files, use a single
Makefile.am that sets and builds all the basic suite of libraries and
binaries for udev. This reduces the number of files in the source tree, and
also reduces drastically the build time when using parallel-make.
With this setup, all the compile steps will be executed in parallel, and
just the linking stage will be (partially) serialised on the libraries
creation.
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These are mostly dummy man pages, without real content, some even
outdated. None of these tools are part of any offered public interface,
and they should not pretend to be by offering a man page.
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Some broken fake cdrom drives return ID_CDROM_MEDIA_STATE=blank.
$ /lib/udev/cdrom_id -d /dev/sr1
main: probing: '/dev/sr1'
cd_inquiry: INQUIRY: [Nokia ][S60 ][1.0 ]
cd_profiles: GET CONFIGURATION: number of profiles 76
cd_profiles: current profile 0x08
cd_media_toc: READ TOC: len: 12
cd_media_toc: last track 1 starts at block 0
cd_media_info: disk type 00
ID_CDROM=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA=1
ID_CDROM_MEDIA_CD=1
ID_CDROM_MEDIA_STATE=blank
Others work fine, but ID_CDROM_MEDIA_STATE is not needed for non-writable CDROM media:
$ /lib/udev/cdrom_id -d /dev/sr1
main: probing: '/dev/sr1'
cd_inquiry: INQUIRY: [SanDisk ][U3 Cruzer Micro ][8.02]
cd_profiles: GET CONFIGURATION: number of profiles 72
cd_profiles: current profile 0x08
cd_media_toc: READ TOC: len: 20
cd_media_toc: track=1 info=0x4(data) start_block=0
cd_media_toc: last track 1 starts at block 0
cd_media_info: disk type 00
ID_CDROM=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA=1
ID_CDROM_MEDIA_CD=1
ID_CDROM_MEDIA_STATE=complete
ID_CDROM_MEDIA_SESSION_COUNT=1
ID_CDROM_MEDIA_TRACK_COUNT=1
ID_CDROM_MEDIA_TRACK_COUNT_DATA=1
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Some broken mobile phones offer a faked cdrom drive with a media
without any tracks.
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