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| author | Karel Zak <kzak@redhat.com> | 2020-11-30 11:38:21 +0100 |
|---|---|---|
| committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2021-01-13 00:58:43 +0900 |
| commit | 4fcc033b5476039a7a8030e1edc261d42cec028b (patch) | |
| tree | b05b198d690bb8b9a50600787c2e31f357e1eece /rules.d | |
| parent | 885598f36c48aa54431dc3f671f07f842fb9360c (diff) | |
| download | systemd-4fcc033b5476039a7a8030e1edc261d42cec028b.tar.gz | |
udev-builtin-blkid: add support for --hint offsets
The next libblkid v2.37 is going to support session offsets for
multi-session CD/DVDs. This feature is implemented by "hint offsets".
These offsets are optional and prober specific (e.g., iso, udf, ...).
For this purpose, the library provides a new function
blkid_probe_set_hint(), and blkid(8) provides a new command-line
option --hint <name>=<offset>. For CD/DVD, the offset name is
"session_offset".
The difference between classic --offset and the new --hint is that
--offset is very restrictive and defines the probing area and the rest
of the device is invisible to the library. The new --hint works
like a suggestion, it provides a hint where the user assumes the
filesystem, but the rest of the device is still readable for the
library (for example, to get some additional superblock information
etc.).
If the --hint is without a value then it defaults to zero.
The option --hint implementation in udev-builtin-blkid.c is backwardly
compatible. If compiled against old libblkid, then the option is used in
the same way as --offset.
Addresses: https://github.com/karelzak/util-linux/issues/1161
Addresses: https://github.com/systemd/systemd/pull/17424
Diffstat (limited to 'rules.d')
| -rw-r--r-- | rules.d/60-persistent-storage.rules | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/rules.d/60-persistent-storage.rules b/rules.d/60-persistent-storage.rules index fc7f733e20..35b4f2c6dc 100644 --- a/rules.d/60-persistent-storage.rules +++ b/rules.d/60-persistent-storage.rules @@ -104,7 +104,7 @@ KERNEL=="vd*[0-9]", ENV{ID_PATH}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID # probe filesystem metadata of optical drives which have a media inserted KERNEL=="sr*", ENV{DISK_EJECT_REQUEST}!="?*", ENV{ID_CDROM_MEDIA_TRACK_COUNT_DATA}=="?*", ENV{ID_CDROM_MEDIA_SESSION_LAST_OFFSET}=="?*", \ - IMPORT{builtin}="blkid --offset=$env{ID_CDROM_MEDIA_SESSION_LAST_OFFSET}" + IMPORT{builtin}="blkid --hint=session_offset=$env{ID_CDROM_MEDIA_SESSION_LAST_OFFSET}" # single-session CDs do not have ID_CDROM_MEDIA_SESSION_LAST_OFFSET KERNEL=="sr*", ENV{DISK_EJECT_REQUEST}!="?*", ENV{ID_CDROM_MEDIA_TRACK_COUNT_DATA}=="?*", ENV{ID_CDROM_MEDIA_SESSION_LAST_OFFSET}=="", \ IMPORT{builtin}="blkid --noraid" |