X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=NEWS;h=bf044c2d9953acd64149c776f54949942321f8b8;hp=aec8bb330b6016241d280c5de9835e967ecb18f1;hb=d80f8ffd1a182fe7fff9816e8a4efc09e877964b;hpb=fc0d4bd4a5f31ad5467918c0f899cffa25a153ca diff --git a/NEWS b/NEWS index aec8bb330..bf044c2d9 100644 --- a/NEWS +++ b/NEWS @@ -1,22 +1,398 @@ +udev 157 +======== +Bugfixes. + +udev 156 +======== +Bugfixes. + +udev 155 +======== +Bugfixes. + +Now the udev daemon itself, does on startup: + - copy the content of /lib/udev/devices to /dev + - create the standard symlinks like /dev/std{in,out,err}, + /dev/core, /dev/fd, ... + - use static node information provided by kernel modules + and creates these nodes to allow module on-demand loading + - possibly apply permissions to all ststic nodes from udev + rules which are annotated to match a static node + +The default mode for a device node is 0600 now to match the kernel +created devtmpfs defaults. If GROUP= is specified and no MODE= is +given the default will be 0660. + +udev 154 +======== +Bugfixes. + +Udev now gradually starts to pass control over the primary device nodes +and their names to the kernel, and will in the end only manage the +permissions of the node, and possibly create additional symlinks. +As a first step NAME="" will be ignored, and NAME= setings with names +other than the kernel provided name will result in a logged warning. +Kernels that don't provide device names, or devtmpfs is not used, will +still work as they did before, but it is strongly recommended to use +only the same names for the primary device node as the recent kernel +provides for all devices. + +udev 153 +======== +Fix broken firmware loader search path. + +udev 152 +======== +Bugfixes. + +"udevadm trigger" defaults to "change" events now instead of "add" +events. The "udev boot script" might need to add "--action=add" to +the trigger command if not already there, in case the initial coldplug +events are expected as "add" events. + +The option "all_partitons" was removed from udev. This should not be +needed for usual hardware. Udev can not safely make assumptions +about non-existing partition major/minor numbers, and therefore no +longer provide this unreliable and unsafe option. + +The option "ignore_remove" was removed from udev. With devtmpfs +udev passed control over device nodes to the kernel. This option +should not be needed, or can not work as advertised. Neither +udev nor the kernel will remove device nodes which are copied from +the /lib/udev/devices/ directory. + +All "add|change" matches are replaced by "!remove" in the rules and +in the udev logic. All types of events will update possible symlinks +and permissions, only "remove" is handled special now. + +The modem modeswitch extra was removed and the external usb_modeswitch +program should be used instead. + +New and fixed keymaps. + +udev 151 +======== +Bugfixes. + +udev 150 +======== +Bugfixes. + +Kernels with SYSFS_DEPRECATED=y are not supported since a while. Many users +depend on the current sysfs layout and the information not available in the +deprecated layout. All remaining support for the deprecated sysfs layout is +removed now. + +udev 149 +======== +Fix for a possible endless loop in the new input_id program. + +udev 148 +======== +Bugfixes. + +The option "ignore_device" does no longer exist. There is no way to +ignore an event, as libudev events can not be suppressed by rules. +It only prevented RUN keys from being executed, which results in an +inconsistent behavior in current setups. + +BUS=, SYSFS{}=, ID= are long deprecated and should be SUBSYSTEM(S)=, +ATTR(S){}=, KERNEL(S)=. It will cause a warning once for every rule +file from now on. + +The support for the deprecated IDE devices has been removed from the +default set of rules. Distros who still care about non-libata drivers +need to add the rules to the compat rules file. + +The ID_CLASS property on input devices has been replaced by the more accurate +set of flags ID_INPUT_{KEYBOARD,KEY,MOUSE,TOUCHPAD,TABLET,JOYSTICK}. These are +determined by the new "input_id" prober now. Some devices, such as touchpads, +can have several classes. So if you previously had custom udev rules which e. g. +checked for ENV{ID_CLASS}=="kbd", you need to replace this with +ENV{ID_INPUT_KEYBOARD}=="?*". + +udev 147 +======== +Bugfixes. + +To support DEVPATH strings larger than the maximum file name length, the +private udev database format has changed. If some software still reads the +private files in /dev/.udev/, which it shouldn't, now it's time to fix it. +Please do not port anything to the new format again, everything in /dev/.udev +is and always was private to udev, and may and will change any time without +prior notice. + +Multiple devices claiming the same names in /dev are limited to symlinks +only now. Mixing identical symlink names and node names is not supported. +This reduces the amount of data in the database significantly. + +NAME="%k" causes a warning now. It's is and always was completely superfluous. +It will break kernel supplied DEVNAMEs and therefore it needs to be removed +from all rules. + +Most NAME= instructions got removed. Kernel 2.6.31 supplies the needed names +if they are not the default. To support older kernels, the NAME= rules need to +be added to the compat rules file. + +Symlinks to udevadm with the old command names are no longer resolved to +the udevadm commands. + +The udev-acl tool got adopted to changes in ConsoleKit. Version 0.4.1 is +required now. + +The option "last_rule" does no longer exist. Its use breaks too many +things which expect to be run from independent later rules, and is an idication +that something needs to be fixed properly instead. + +The gudev API is no longer marked as experimental, +G_UDEV_API_IS_SUBJECT_TO_CHANGE is no longer needed. The gudev introspection +is enabled by default now. Various projects already depend on introspection +information to bind dynamic languages to the gudev interfaces. + +udev 146 +======== +Bugfixes. + +The udevadm trigger "--retry-failed" option, which is replaced since quite +a while by "--type=failed" is removed. + +The failed tracking was not working at all for a few releases. The RUN +option "ignore_error" is replaced by a "fail_event_on_error" option, and the +default is not to track any failing RUN executions. + +New keymaps, new modem, hid2hci updated. + +udev 145 +======== +Fix possible crash in udevd when worker processes are busy, rules are +changed at the same time, and workers get killed to reload the rules. + +udev 144 +======== +Bugfixes. + +Properties set with ENV{.FOO}="bar" are marked private by starting the +name with a '.'. They will not be stored in the database, and not be +exported with the event. + +Firmware files are looked up in: + /lib/firmware/updates/$(uname -r) + /lib/firmware/updates + /lib/firmware/$(uname -r) + /lib/firmware" +now. + +ATA devices switched the property from ID_BUS=scsi to ID_BUS=ata. +ata_id, instead of scsi_id, is the default tool now for ATA devices. + +udev 143 +======== +Bugfixes. + +The configure options have changed because another library needs to be +installed in a different location. Instead of exec_prefix and udev_prefix, +libdir, rootlibdir and libexecdir are used. The Details are explained in +the README file. + +Event processes now get re-used after they handled an event. This reduces +the number of forks and the pressure on the CPU significantly, because +cloned event processes no longer cause page faults in the main daemon. +After the events have settled, a few worker processes stay around for +future events, all others get cleaned up. + +To be able to use signalfd(), udev depends on kernel version 2.6.25 now. +Also inotify support is mandatory now to run udev. + +The format of the queue exported by the udev damon has changed. There is +no longer a /dev/.udev/queue/ directory. The current event queue can be +accessed with udevadm settle and libudedv. + +Libudev does not have the unstable API header anymore. From now on, +incompatible changes will be handled by bumping the library major version. + +To build udev from the git tree gtk-doc is needed now. The tarballs will +build without it and contain the pre-built documentation. An online copy +is available here: + http://www.kernel.org/pub/linux/utils/kernel/hotplug/libudev/ + +The tools from the udev-extras repository have been merged into the main +udev repository. Some of the extras have larger external dependencies, and +they can be disabled with the configure switch --disable-extras. + +udev 142 +======== +Bugfixes. + +The program vol_id and the library libvolume_id are removed from the +repository. Libvolume_id is merged with libblkid from the util-linux-ng +package. Persistent disk links for label and uuid depend on the +util-linux-ng version (2.15) of blkid now. Older versions of blkid +can not be used with udev. + +Libudev allows to subscribe to udev events. To prevent unwanted messages +to be delivered, and waking up the subscribing process, a filter can be +installed, to drop messages inside a kernel socket filter. The filters +match on the : properties of the device. + This is part of the ongoing effort to replace HAL, and switch current +users over to directly use libudev. + Libudev is still marked as experimental, and its interface might +eventually change if needed, but no major changes of the currently exported +interface are expected anymore, and a first stable release should happen +soon. + +A too old kernel (2.6.21) or a kernel with CONFIG_SYSFS_DEPRECATED +is not supported since while and udevd will log an error message at +startup. It should still be able to boot-up, but advanced rules and system +services which depend on the information not available in the old sysfs +format will fail to work correctly. + +DVB device naming is supplied by the kernel now. In case older kernels +need to be supported, the old shell script should be added to a compat +rules file. + +udev 141 +======== +Bugfixes. + +The processed udev events get send back to the netlink socket. Libudev +provides access to these events. This is work-in-progress, to replace +the DeviceKit daemon functionality directly with libudev. There are +upcoming kernel changes to allow non-root users to subcribe to these +events. + +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 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.