systemd/rules/60-persistent-storage-tape.rules
Rusty Bird 542127ea96 rules: UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG property (#3714)
Sometimes, the persistent storage rules should be skipped for a subset
of devices. For example, the Qubes operating system prevents dom0 from
parsing untrusted block device content (such as filesystem metadata) by
shipping a custom 60-persistent-storage.rules, patched to bail out early
if the device name matches a hardcoded pattern.

As a less brittle and more flexible alternative, this commit adds a line
to the two relevant .rules files which makes them test the value of the
UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG device property, modeled
after the various DM_UDEV_DISABLE_*_RULES_FLAG properties.
2016-07-15 18:47:42 +02:00

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# do not edit this file, it will be overwritten on update
# persistent storage links: /dev/tape/{by-id,by-path}
ACTION=="remove", GOTO="persistent_storage_tape_end"
ENV{UDEV_DISABLE_PERSISTENT_STORAGE_RULES_FLAG}=="1", GOTO="persistent_storage_tape_end"
# type 8 devices are "Medium Changers"
SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d $devnode", \
SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}"
SUBSYSTEM!="scsi_tape", GOTO="persistent_storage_tape_end"
KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*", ENV{ID_SERIAL}="$attr{ieee1394_id}", ENV{ID_BUS}="ieee1394"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", KERNELS=="[0-9]*:*[0-9]", ENV{.BSG_DEV}="$root/bsg/$id"
KERNEL=="st*[0-9]|nst*[0-9]", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --whitelisted --export --device=$env{.BSG_DEV}", ENV{ID_BUS}="scsi"
KERNEL=="st*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
KERNEL=="nst*[0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst"
# by-path (parent device path)
KERNEL=="st*[0-9]|nst*[0-9]", IMPORT{builtin}="path_id"
KERNEL=="st*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}"
KERNEL=="nst*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}-nst"
LABEL="persistent_storage_tape_end"