Re: udev cdrom_id rules prevent unmounted CD from spinning down

[Nick Bowler <nbowler@elliptictech.com>]

On 12:06 Mon 17 May     , Kay Sievers wrote:
> To make sure you don't have any other stuff accessing the device, can
> you please attach the output of:
>   udevadm test /class/block/sr0
> so we can make sure it's nothing we don't think of.

Appended.

> To narrow down the blkid issue, if you comment out the rule, and let
> the drive spin down, then run:
>   /sbin/blkid -p -oudev /dev/sr0
> manually, do you see while doing that any events generated in:
>   udevadm monitor
> ?

The command causes the cd to spin up, but nothing is printed by udevadm
monitor as a result.

# udevadm test /class/block/sr0
run_command: calling: test
udevadm_test: version 154
This program is for debugging only, it does not run any program,
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.

parse_file: reading '/dev/.udev/rules.d/10-root-link.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/30-kernel-compat.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/40-gentoo.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/40-usb_modeswitch.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/50-firmware.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/50-udev-default.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-cdrom_id.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-floppy.rules' as rules file
parse_file: reading '/etc/udev/rules.d/60-pcmcia.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-alsa.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-input.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-serial.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-storage-tape.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-storage.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/60-persistent-v4l.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/61-mobile-action.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/61-persistent-storage-edd.rules' as rules file
parse_file: reading '/etc/udev/rules.d/65-kvm.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/70-acl.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/70-hid2hci.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-libgphoto2.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-cd.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-net.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/75-cd-aliases-generator.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/75-net-description.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/75-persistent-net-generator.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/75-tty-description.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/78-sound-card.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/79-fstab_import.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/80-drivers.rules' as rules file
parse_file: reading '/etc/udev/rules.d/90-local.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/90-network.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/90-pulseaudio.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/95-keyboard-force-release.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/95-keymap.rules' as rules file
parse_file: reading '/lib64/udev/rules.d/95-udev-late.rules' as rules file
parse_file: reading '/etc/udev/rules.d/99-hsf.rules' as rules file
udev_rules_new: rules use 81948 bytes tokens (6829 * 12 bytes), 18007 bytes buffer
udev_rules_new: temporary index used 29900 bytes (1495 * 20 bytes)
udev_device_new_from_syspath: device 0x1790140 has devpath '/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0'
udev_device_new_from_syspath: device 0x17a7b30 has devpath '/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0'
udev_device_read_db: device 0x17a7b30 filled with db file data
udev_rules_apply_to_event: LINK 'block/11:0' /lib64/udev/rules.d/50-udev-default.rules:3
udev_rules_apply_to_event: GROUP 6 /lib64/udev/rules.d/50-udev-default.rules:76
udev_rules_apply_to_event: GROUP 19 /lib64/udev/rules.d/50-udev-default.rules:82
udev_rules_apply_to_event: LINK 'scd0' /lib64/udev/rules.d/50-udev-default.rules:82
udev_rules_apply_to_event: IMPORT 'cdrom_id --export /dev/sr0' /lib64/udev/rules.d/60-cdrom_id.rules:9
util_run_program: 'cdrom_id --export /dev/sr0' started
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_CD=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_CD_R=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_CD_RW=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_R=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_RW=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_RAM=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_PLUS_R=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_PLUS_RW=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_DVD_PLUS_R_DL=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MRW=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MRW_W=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MEDIA=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MEDIA_CD=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MEDIA_SESSION_COUNT=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MEDIA_TRACK_COUNT=1'
util_run_program: '/lib64/udev/cdrom_id' (stdout) 'ID_CDROM_MEDIA_TRACK_COUNT_DATA=1'
util_run_program: 'cdrom_id --export /dev/sr0' returned with exitcode 0
udev_device_new_from_syspath: device 0x179d460 has devpath '/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0'
udev_device_new_from_syspath: device 0x179d7b0 has devpath '/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0'
udev_device_new_from_syspath: device 0x179dae0 has devpath '/devices/pci0000:00/0000:00:1f.2/host1'
udev_device_new_from_syspath: device 0x179de00 has devpath '/devices/pci0000:00/0000:00:1f.2'
udev_device_new_from_syspath: device 0x179e110 has devpath '/devices/pci0000:00'
udev_rules_apply_to_event: IMPORT 'scsi_id --export --whitelisted -d /dev/sr0' /lib64/udev/rules.d/60-persistent-storage.rules:28
util_run_program: 'scsi_id --export --whitelisted -d /dev/sr0' started
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_SCSI=1'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_VENDOR=Optiarc'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_VENDOR_ENC=Optiarc\x20'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_MODEL=DVD_RW_AD-7910S'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_MODEL_ENC=DVD\x20RW\x20AD-7910S\x20'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_REVISION=1.D2'
util_run_program: '/lib64/udev/scsi_id' (stdout) 'ID_TYPEÍ'
util_run_program: 'scsi_id --export --whitelisted -d /dev/sr0' returned with exitcode 0
udev_rules_apply_to_event: IMPORT 'path_id /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0' /lib64/udev/rules.d/60-persistent-storage.rules:47
util_run_program: 'path_id /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0' started
util_run_program: '/lib64/udev/path_id' (stdout) 'ID_PATH=pci-0000:00:1f.2-scsi-1:0:0:0'
util_run_program: 'path_id /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0' returned with exitcode 0
udev_rules_apply_to_event: LINK 'disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0' /lib64/udev/rules.d/60-persistent-storage.rules:48
udev_rules_apply_to_event: LINK 'cdrom' /etc/udev/rules.d/70-persistent-cd.rules:8
udev_rules_apply_to_event: LINK 'cdrw' /etc/udev/rules.d/70-persistent-cd.rules:9
udev_rules_apply_to_event: LINK 'dvd' /etc/udev/rules.d/70-persistent-cd.rules:10
udev_rules_apply_to_event: LINK 'dvdrw' /etc/udev/rules.d/70-persistent-cd.rules:11
udev_event_execute_rules: no node name set, will use kernel supplied name 'sr0'
udev_device_update_db: created db file for '/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0' in '/dev/.udev/db/block:sr0'
udev_node_add: creating device node '/dev/sr0', devnum\x11:0, mode\x0660, uid=0, gid\x19
udev_node_mknod: preserve file '/dev/sr0', because it has correct dev_t
udev_node_mknod: preserve permissions /dev/sr0, 060660, uid=0, gid\x19
node_symlink: preserve already existing symlink '/dev/block/11:0' to '../sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/scd0'
link_update: creating link '/dev/scd0' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/scd0' to 'sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/disk\x2fby-path\x2fpci-0000:00:1f.2-scsi-1:0:0:0'
link_update: creating link '/dev/disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0' to '../../sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/cdrom'
link_update: creating link '/dev/cdrom' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/cdrom' to 'sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/cdrw'
link_update: creating link '/dev/cdrw' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/cdrw' to 'sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/dvd'
link_update: creating link '/dev/dvd' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/dvd' to 'sr0'
link_find_prioritized: found 'b11:0' claiming '/dev/.udev/links/dvdrw'
link_update: creating link '/dev/dvdrw' to '/dev/sr0'
node_symlink: preserve already existing symlink '/dev/dvdrw' to 'sr0'
udevadm_test: UDEV_LOG=6
udevadm_test: DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
udevadm_test: MAJOR\x11
udevadm_test: MINOR=0
udevadm_test: DEVNAME=/dev/sr0
udevadm_test: DEVTYPE=disk
udevadm_test: ACTION­d
udevadm_test: SUBSYSTEM=block
udevadm_test: DEVLINKS=/dev/block/11:0 /dev/scd0 /dev/disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0 /dev/cdrom /dev/cdrw /dev/dvd /dev/dvdrw
udevadm_test: ID_CDROM=1
udevadm_test: ID_CDROM_CD=1
udevadm_test: ID_CDROM_CD_R=1
udevadm_test: ID_CDROM_CD_RW=1
udevadm_test: ID_CDROM_DVD=1
udevadm_test: ID_CDROM_DVD_R=1
udevadm_test: ID_CDROM_DVD_RW=1
udevadm_test: ID_CDROM_DVD_RAM=1
udevadm_test: ID_CDROM_DVD_PLUS_R=1
udevadm_test: ID_CDROM_DVD_PLUS_RW=1
udevadm_test: ID_CDROM_DVD_PLUS_R_DL=1
udevadm_test: ID_CDROM_MRW=1
udevadm_test: ID_CDROM_MRW_W=1
udevadm_test: ID_CDROM_MEDIA=1
udevadm_test: ID_CDROM_MEDIA_CD=1
udevadm_test: ID_CDROM_MEDIA_SESSION_COUNT=1
udevadm_test: ID_CDROM_MEDIA_TRACK_COUNT=1
udevadm_test: ID_CDROM_MEDIA_TRACK_COUNT_DATA=1
udevadm_test: ID_SCSI=1
udevadm_test: ID_VENDOR=Optiarc
udevadm_test: ID_VENDOR_ENC=Optiarc\x20
udevadm_test: ID_MODEL=DVD_RW_AD-7910S
udevadm_test: ID_MODEL_ENC=DVD\x20RW\x20AD-7910S\x20
udevadm_test: ID_REVISION=1.D2
udevadm_test: ID_TYPEÍ
udevadm_test: ID_BUS=scsi
udevadm_test: ID_PATH=pci-0000:00:1f.2-scsi-1:0:0:0
udevadm_test: TAGS=:udev-acl:
udevadm_test: GENERATED=1

-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)