X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=NEWS;h=eca93c4d981e4bb7ceb4b77ef5dc0a62b6247b3a;hp=b102ba37a37c3da1bfccd7bb2f8913ad76bdbec8;hb=977f6f4b3dfbdd32d7df5a774a4ed761d5d4b98f;hpb=510af2e9397373a562aa66f9a8027980057bfa09 diff --git a/NEWS b/NEWS index b102ba37a..eca93c4d9 100644 --- a/NEWS +++ b/NEWS @@ -1,36 +1,136 @@ +udev 140 +======== +Bugfixes. + +"udevadm settle" now optionally accepts a range of events to wait for, +instead of waiting for "all" events. + +udev 139 +======== +Bugfixes. + +The installed watch for block device metadata changes is now removed +during event hadling, because some (broken) tools may be called from udev +rules and (wrongly) open the device with write access. After the finished +event handling the watch is restored. + +udev 138 +======== +Bugfixes. + +Device nodes can be watched for changes with inotify with OPTIONS="watch". +If closed after being opened for writing, a "change" uevent will occur. +/dev/disk/by-{label,uuid}/* symlinks will be automatically updated. + +udev 137 +======== +Bugfixes. + +The udevadm test command has no longer a --force option, nodes and symlinks +are always updated with a test run now. + +The udevd daemon can be started with --resolve-names=never to avoid all user +and group lookups (e.g. in cut-down systems) or --resolve-names=late to +lookup user and groups every time events are handled. + +udev 136 +======== +Bugfixes. + +We are currently merging the Ubuntu rules in the udev default rules, +and get one step closer to provide a common Linux /dev setup, regarding +device names, symlinks, and default device permissions. On udev startup, +we now expect the following groups to be resolvable to their ids with +glibc's getgrnam(): + disk, cdrom, floppy, tape, audio, video, lp, tty, dialout, kmem. +LDAP setups need to make sure, that these groups are always resolvable at +bootup, with only the rootfs mounted, and without network access available. + +Some systems may need to add some new, currently not used groups, or need +to add some users to new groups, but the cost of this change is minimal, +compared to the pain the current, rather random, differences between the +various distributions cause for upstream projects and third-party vendors. + +In general, "normal" users who log into a machine should never be a member +of any such group, but the device-access should be managed by dynamic ACLs, +which get added and removed for the specific users on login/logout and +session activity/inactivity. These groups are only provided for custom setups, +and mainly system services, to allow proper privilege separation. +A video-streaming daemon uid would be a member of "audio" and "video", to get +access to the sound and video devices, but no "normal" user should ever belong +to the "audio" group, because he could listen to the built-in microphone with +any ssh-session established from the other side of the world. + +/dev/serial/by-{id,path}/ now contains links for ttyUSB devices, +which do not depend on the kernel device name. As usual, unique +devices - only a single one per product connected, or a real +USB serial number in the device - are always found with the same +name in the by-id/ directory. +Completely identical devices may overwrite their names in by-id/ +and can only be found reliably in the by-path/ directory. Devices +specified by by-path/ must not change their connection, like the +USB port number they are plugged in, to keep their name. + +To support some advanced features, Linux 2.6.22 is the oldest supported +version now. The kernel config with enabled SYSFS_DEPRECATED is no longer +supported. Older kernels should still work, and devices nodes should be +reliably created, but some rules and libudev will not work correctly because +the old kernels do not provide the expected information or interfaces. + +udev 135 +======== +Bugfixes. + +Fix for a possible segfault while swapping network interface names in udev +versions 131-134. + +udev 134 +======== +Bugfixes. + +The group "video" is part of the default rules now. + udev 133 ======== +Bugfix for kernels using SYSFS_DEPRECATED* option and finding parent +block devices in some cases. No common distro uses this option anymore, +and we do not get enough testing for this and recent udev versions. If +this option is not needed to run some old distro with a new kernel, +it should be disabled in the kernel config. + +Bugfix for the $links substitution variable, which may crash if no links +are created. This should not happen in usual setups because we always +create /dev/{block,char}/ links. The strings of the parsed rules, which are kept in memory, no longer -contain duplicate entries, or duplicate tails of strings. This reduces -the total size of a huge distro rule set to 0.08 MB, compared to the -1.2MB of udev version 130. +contain duplicate entries, or duplicate tails of strings. This, and the +new rules parsing/matching code reduces the total in-memory size of +a huge distro rule sets to 0.08 MB, compared to the 1.2MB of udev +version 130. The export of DEVTYPE=disk/partition got removed from the default -rules. This value is available from the kernel. -The pnp shell script modprobe hack is removed from the default rules. -ACPI devices have proper modalias support and take care of the same -functionality. +rules. This value is available from the kernel. The pnp shell script +modprobe hack is removed from the default rules. ACPI devices have _proper_ +modalias support and take care of the same functionality. Installations which support old kernels, but install current default -udev rules may need to add that to the compat rules file. +udev rules may want to add that to the compat rules file. Libvolume_id now always probes for all known filesystems, and does not -stop at the first match. Some filesystems are marked as "exclusive probe" -and if one of these filesytem types match, libvolume_id will not return -a probing result if any other filesystem type matches. This is intended -to help with conflicting left-over signatures from earlier file system -formats. That way, we no longer depend on the probing order for competing -signatures. -In some cases the kernel allows to mount a volume with the old filesystem -type, before it has been re-formatted with a different type. This can -damage the new filesystem and lead to data loss. Because volume_id can -not decide which is the correct signature, the wrong signatures need to -be removed manually from the volume, or the volume needs to be reformatted -to make filesystem auto-detection and possible auto-mounting working. +stop at the first match. Some filesystems are marked as "exclusive probe", +and if any other filesytem type matches at the same time, libvolume_id +will, by default, not return any probing result. This is intended to prevent +mis-detection with conflicting left-over signatures found from earlier +file system formats. That way, we no longer depend on the probe-order +in case of multiple competing signatures. In some setups the kernel allows +to mount a volume with just the old filesystem signature still in place. +This may damage the new filesystem and cause data-loss, just by mounting +it. Because volume_id can not decide which one the correct signature is, +the wrong signatures need to be removed manually from the volume, or the +volume needs to be reformatted, to enable filesystem detection and possible +auto-mounting. udev 132 ======== - Fix segfault if compiled without optimization and dbg() does not get compiled out and uses variables which are not available.