|
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 <subsytem>:<devtype> 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, 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. Installations which support old kernels, but install current default 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. udev 131 ======== Bugfixes. (And maybe new bugs. :)) The rule matching engine got converted from a rule list to a token array which reduced the in-memory rules representation of a full featured distros with thousends of udev rules from 1.2MB to 0.12 MB. Limits like 5 ENV and ATTR matches, and one single instance for most other keys per rule are gone. The NAME assignment is no longer special cased. If later rules assign a NAME value again, the former value will be overwritten. As usual for most other keys, the NAME value can be protected by doing a final assignment with NAME:="<value>". All udev code now uses libudev, which is also exported. The library is still under development, marked as experimental, and its interface may change as long as the DeviceKit integration is not finished. Many thanks to Alan Jenkins for his continuous help, and finding and optimizing some of the computing expensive parts. udev 130 ======== Bugfixes. Kernel devices and device nodes are connected now by reverse indizes in /sys and /dev. A device number retrieved by a stat() or similar, the kernel device directory can be found by looking up: /sys/dev/{block,char}/<maj>:<min> and the device node of the same device by looking up: /dev/{block,char}/<maj>:<min> udev 129 ======== Fix recently introduced bug, which caused a compilation without large file support, where vol_id does not recognize raid signatures at the end of a volume. Firewire disks now create both, by-id/scsi-* and by-id/ieee-* links. Seems some kernel versions prevent the creation of the ieee-* links, so people used the scsi-* link which disappeared now. More libudev work. Almost all udevadm functionality comes from libudev now. udevadm trigger has a new option --type, which allows to trigger events for "devices", for "subsystems", or "failed" devices. The old option --retry-failed" still works, but is no longer mentioned in the man page. udev 128 ======== Bugfixes. The udevadm info --device-id-of-file= output has changed to use the obvious format. Possible current users should use the --export option which is not affected. The old udev commands symlinks to udevadm are not installed, if these symlinks are used, a warning is printed. udev 127 ======== Bugfixes. Optical drive's media is no longer probed for raid signatures, reading the end of the device causes some devices to malfunction. Also the offset of the last session found is used now to probe for the filesystem. The volume_id library got a major version number update to 1, some deprecated functions are removed. A shared library "libudev" gets installed now to provide access to udev device information. DeviceKit, the successor of HAL, will need this library to access the udev database and search sysfs for devices. The library is currently in an experimental state, also the API is expected to change, as long as the DeviceKit integration is not finished. udev 126 ======== We use ./configure now. See INSTALL for details. Current options are: --prefix= "/usr" - prefix for man pages, include files --exec-prefix= "" - the root filesystem, prefix for libs and binaries --sysconfdir= "/etc" --with-libdir-name= "lib" - directory name for libraries, not a path name multilib 64bit systems may use "lib64" instead of "lib" --enable-debug compile-in verbose debug messages --disable-logging disable all logging and compile-out all log strings --with-selinux link against SELInux libraries, to set the expected context for created files In the default rules, the group "disk" gets permissions 0660 instead of 0640. One small step closer to unify distro rules. Some day, all distros hopefully end up with the same set of rules. No symlinks to udevadm are installed anymore, if they are still needed, they should be provided by the package. udev 125 ======== Bugfixes. Default udev rules, which are not supposed to be edited by the user, should be placed in /lib/udev/rules.d/ now, to make it clear that they are private to the udev package and will be replaced with an update. Udev will pick up rule files from: /lib/udev/rules.d/ - default installed rules /etc/udev/rules.d/ - user rules + on-the-fly generated rules /dev/.udev/rules.d/ - temporary non-persistent rules created after bootup It does not matter in which directory a rule file lives, all files are sorted in lexical order. To help creating /dev/root, we have now: $ udevadm info --export --export-prefix="ROOT_" --device-id-of-file=/ ROOT_MAJOR=8 ROOT_MINOR=5 In case the current --device-id-of-file is already used, please switch to the --export format version, it saves the output parsing and the old format will be changed to use ':' as a separator, like the format in the sysfs 'dev' file. udev 124 ======== Fix cdrom_id to properly recognize blank media. udev 123 ======== Bugfixes. Tape drive id-data is queried from /dev/bsg/* instead of the tape nodes. This avoids rewinding tapes on open(). udev 122 ======== Bugfixes. The symlinks udevcontrol and udevtrigger are no longer installed by the Makefile. The scsi_id program does not depend on sysfs anymore. It can speak SGv4 now, so /dev/bsg/* device nodes can be used, to query SCSI device data, which should solve some old problems with tape devices, where we better do not open all tape device nodes to identify the device. udev 121 ======== Many bugfixes. The cdrom_id program is replaced by an advanced version, which can detect most common device types, and also properties of the inserted media. This is part of moving some basic functionality from HAL into udev (and the kernel). udev 120 ======== Bugfixes. The last WAIT_FOR_SYSFS rule is removed from the default rules. The symlinks to udevadm for the debugging tools: udevmonitor and udevtest are no longer created. The symlinks to the udevadm man page for the old tool names are no longer created. Abstract namespace sockets paths in RUN+="socket:@<path>" rules, should be prefixed with '@' to indicate that the path is not a real file. udev 119 ======== Bugfixes. udev 118 ======== Bugfixes. Udevstart is removed from the tree, it did not get installed for a long time now, and is long replaced by trigger and settle. udev 117 ======== Bugfixes. All udev tools are merged into a single binary called udevadm. The old names of the tools are built-in commands in udevadm now. Symlinks to udevadm, with the names of the old tools, provide the same functionality as the standalone tools. There is also only a single udevadm.8 man page left for all tools. Tools like mkinitramfs should be checked, if they need to include udevadm in the list of files. udev 116 ======== Bugfixes. udev 115 ======== Bugfixes. The etc/udev/rules.d/ directory now contains a default set of basic udev rules. This initial version is the result of a rules file merge of Fedora and openSUSE. For these both distros only a few specific rules are left in their own file, named after the distro. Rules which are optionally installed, because they are only valid for a specific architecture, or rules for subsystems which are not always used are in etc/udev/packages/. udev 114 ======== Bugfixes. Dynamic rules can be created in /dev/.udev/rules.d/ to trigger actions by dynamically created rules. SYMLINK=="<value>" matches agains the entries in the list of currently defined symlinks. The links are not created in the filesystem at that point in time, but the values can be matched. RUN{ignore_error}+="<program>" will ignore any exit code from the program and not record as a failed event. udev 113 ======== Bugfixes. Final merge of patches/features from the Ubuntu package. udev 112 ======== Bugfixes. Control characters in filesystem label strings are no longer silenty removed, but hex-encoded, to be able to uniquely identify the device by its symlink in /dev/disk/by-label/. If libvolume_id is used by mount(8), LABEL= will work as expected, if slashes or other characters are used in the label string. To test the existence of a file, TEST=="<file>" and TEST!="<file>" can be specified now. The TEST key accepts an optional mode mask TEST{0100}=="<is executable file>". Scsi_id now supports a mode without expecting scsi-specific sysfs entries to allow the extraction of cciss-device persistent properties. udev 111 ======== Bugfixes. In the future, we may see uuid's which are just simple character strings (see the DDF Raid Specification). For that reason vol_id now exports ID_FS_UUID_SAFE, just like ID_FS_LABEL_SAFE. For things like the creation of symlinks, the *_SAFE values ensure, that no control or whitespace characters are used in the filename. Possible users of libvolume_id, please use the volume_id_get_* functions. The public struct will go away in a future release of the library. udev 110 ======== Bugfixes. Removal of useless extras/eventrecorder.sh. udev 109 ======== Bugfixes. udev 108 ======== Bugfixes. The directory multiplexer for dev.d/ and hotplug.d are finally removed from the udev package. udev 107 ======== Bugfixes. Symlinks can have priorities now, the priority is assigned to the device and specified with OPTIONS="link_priority=100". Devices with higher priorities overwrite the symlinks of devices with lower priorities. If the device that currently owns the link, goes away, the symlink will be removed, and recreated, pointing to the next device with the highest actual priority. This should make /dev/disk/by-{label,uuid,id} more reliable, if multiple devices contain the same metadata and overwrite these symlinks. The dasd_id program is removed from the udev tree, and dasdinfo, with the needed rules, are part of the s390-tools now. Please add KERNEL=="[0-9]*:[0-9]*" to the scsi wait-for-sysfs rule, we may get the scsi sysfs mess fixed some day, and this will only catch the devices we are looking for. USB serial numbers for storage devices have the target:lun now appended, to make it possibble to distinguish broken multi-lun devices with all the same SCSI identifiers. Note: The extra "run_directory" which searches and executes stuff in /etc/hotplug.d/ and /etc/dev.d/ is long deprecated, and will be removed with the next release. Make sure, that you don't use it anymore, or provides your own implementation of that inefficient stuff. We are tired of reports about a "slow udev", because these directories contain stuff, that runs with _every_ event, instead of using rules, that run programs only for the matching events. udev 106 ======== Bugfixes. udev 105 ======== Bugfixes. DRIVER== will match only for devices that actually have a real driver. DRIVERS== must be used, if parent devices should be included in the match. Libvolume_id's "linux_raid" detection needed another fix. udev 104 ======== Bugfixes. udev 103 ======== Add additional check to volume_id detection of via_raid, cause some company decided to put a matching pattern all over the empty storage area of their music players. udev 102 ======== Fix path_id for SAS devices. udev 101 ======== The udev daemon can be started with --debug-trace now, which will execute all events serialized to get a chance to catch a possible action that crashes the box. A warning is logged, if PHYSDEV* keys, the "device" link, or a parent device attribute like $attr{../file} is used, only WAIT_FOR_SYSFS rules are excluded from the warning. Referencing parent attributes directly may break when something in the kernel driver model changes. Udev will just find the attribute by walking up the parent chain. Udevtrigger now sorts the list of devices depending on the device dependency, so a "usb" device is triggered after the parent "pci" device. udev 100 ======== Revert persistent-storage ata-serial '_' '-' replacement. udev 099 ======== Bugfixes. Udevtrigger can now filter the list of devices to be triggered. Matches for subsystems or sysfs attributes can be specified. The entries in /dev/.udev/queue and /dev/.udev/failed have changed to zero-sized files to avoid pointing to /sys and confuse broken tools which scan the /dev directory. To retry failed events, udevtrigger --retry-failed should be used now. The rules and scripts to create udev rules for persistent network devices and optical drives are in the extras/rules_generator directory now. If you use something similar, please consider replacing your own version with this, to share the support effort. The rule_generator installs its own rules into /etc/udev/rules.d. The cdrom_id tool installs its own rule now in /etc/udev/rules.d, cause the rule_generator depends on cdrom_id to be called in an earlier rule. udev 098 ======== Bugfixes. Renaming of some key names (the old names still work): BUS -> SUBSYSTEMS, ID -> KERNELS, SYSFS -> ATTRS, DRIVER -> DRIVERS. (The behavior of the key DRIVER will change soon in one of the next releases, to match only the event device, please switch to DRIVERS instead. If DRIVER is used, it will behave like DRIVERS, but an error is logged. With the new key names, we have a more consistent and simpler scheme. We can match the properties of the event device only, with: KERNEL, SUBSYSTEM, ATTR, DRIVER. Or include all the parent devices in the match, with: KERNELS, SUBSYSTEMS, ATTRS, DRIVERS. ID, BUS, SYSFS, DRIVER are no longer mentioned in the man page and should be switched in the rule files. ATTR{file}="value" can be used now, to write to a sysfs file of the event device. Instead of: ..., SYSFS{type}=="0|7|14", RUN+="/bin/sh -c 'echo 60 > /sys$$DEVPATH/timeout'" we now can do: ..., ATTR{type}=="0|7|14", ATTR{timeout}="60" All the PHYSDEV* keys are deprecated and will be removed from a future kernel: PHYDEVPATH - is the path of a parent device and should not be needed at all. PHYSDEVBUS - is just a SUBSYSTEM value of a parent, and can be matched with SUBSYSTEMS== PHYSDEVDRIVER - for bus devices it is available as ENV{DRIVER}. Newer kernels will have DRIVER in the environment, for older kernels udev puts in. Class device will no longer carry this property of a parent and DRIVERS== can be used to match such a parent value. Note that ENV{DRIVER} is only available for a few bus devices, where the driver is already bound at device event time. On coldplug, the events for a lot devices are already bound to a driver, and they will have that value set. But on hotplug, at the time the kernel creates the device, it can't know what driver may claim the device after that, therefore in most cases it will be empty. Failed events should now be re-triggered with: udevtrigger --retry-failed. Please switch to this command, so we keep the details of the /dev/.udev/failed/ files private to the udev tools. We may need to switch the current symlink target, cause some obviously broken tools try to scan all files in /dev including /dev/.udev/, find the links to /sys and end up stat()'ing sysfs files million times. This takes ages on slow boxes. The udevinfo attribute walk (-a) now works with giving a device node name (-n) instead of a devpath (-p). The query now always works, also when no database file was created by udev. The built-in /etc/passwd /etc/group parser is removed, we always depend on getpwnam() and getgrnam() now. One of the next releases will depend on fnmatch() and may use getopt_long(). udev 097 ======== Bugfixes and small improvements. udev 096 ======== Fix path_id for recent kernels. udev 095 ======== %e is finally gone. Added support for swapping network interface names, by temporarily renaming the device and wait for the target name to become free. udev 094 ======== The built-in MODALIAS key and substitution is removed. udev 093 ======== The binary firmware helper is replaced by the usual simple shell script. Udevsend is removed from the tree. udev 092 ======== Bugfix release. udev 091 ======== Some more keys require the correct use of '==' and '=' depending on the kind of operation beeing an assignment or a match. Rules with invalid operations are skipped and logged to syslog. Please test with udevtest if the parsing of your rules throws errors and fix possibly broken rules. udev 090 ======== Provide "udevsettle" to wait for all current udev events to finish. It also watches the current kernel netlink queue by comparing the even sequence number to make sure that there are no current pending events that have not already arrived in the daemon. udev 089 ======== Fix rule to skip persistent rules for removable IDE devices, which also skipped optical IDE drives. All *_id program are installed in /lib/udev/ by default now. No binary is stripped anymore as this should be done in the packaging process and not at build time. libvolume_id is provided as a shared library now and vol_id is linked against it. Also one of the next HAL versions will require this library, and the HAL build process will also require the header file to be installed. The copy of the same code in HAL will be removed to have only a single copy left on the system. udev 088 ======== Add persistent links for SCSI tapes. The rules file is renamed to 60-persistent-storage.rules. Create persistent path for usb devices. Can be used for all sorts of devices that can't be distinguished by other properties like multiple identical keyboards and mice connected to the same box. Provide "udevtrigger" program to request events on coldplug. The shell script is much too slow with thousends of devices. udev 087 ======== Fix persistent disk rules to exclude removable IDE drives. Warn if %e, $modalias or MODALIAS is used. udev 086 ======== Fix queue export, which wasn't correct for subsequent add/remove events for the same device. udev 085 ======== Fix cramfs detection on big endian. Make WAIT_FOR_SYSFS usable in "normal" rules and silent if the whole device goes away. udev 084 ======== If BUS== and SYSFS{}== have been used in the same rule, the sysfs attributes were only checked at the parent device that matched the by BUS requested subsystem. Fix it to also look at the device we received the event for. Build variable CROSS has changed to CROSS_COMPILE to match the kernel build name. udev 083 ======== Fix a bug where NAME="" would prevent RUN from beeing executed. RUN="/bin/program" does not longer automatically add the subsystem as the first parameter. This is from the days of /sbin/hotplug which is dead now and it's just confusing to need to add a space at the end of the program name to prevent this. If you use rules that need the subsystem as the first parameter, like the old "udev_run_hotlugd" and "udev_run_devd", add the subsystem to the key like RUN+="/bin/program $env{SUBSYSTEM}". udev 082 ======== The udev man page has moved to udev(7) as it does not describe a command anymore. The programs udev, udevstart and udevsend are no longer installed by default and must be copied manually, if they should be installed or included in a package. Fix a bug where "ignore_device" could run earlier collected RUN keys before the ignore rule was applied. More preparation for future sysfs changes. usb_id and scsi_id no longer depend on a magic order of devices in the /devices chain. Specific devices should be requested by their subsytem. This will always find the scsi parent device without depending on a specific path position: dev = sysfs_device_get(devpath); dev_usb = sysfs_device_get_parent_with_subsystem(dev, "scsi"); The "device" link in the current sysfs layout will be automatically _resolved_ as a parent and in the new sysfs layout it will just _be_ the parent in the devpath. If a device is requested by it's symlink, like all class devices in the new sysfs layout will look like, it gets automatically resolved and substituted with the real devpath and not the symlink path. Note: A similar logic must be applied to _all_ sysfs users, including scripts, that search along parent devices in sysfs. The explicit use of the "device" link must be avoided. With the future sysfs layout all DEVPATH's will start with /devices/ and have a "subsystem" symlink poiting back to the "class" or the "bus". The layout of the parent devices in /devices is not necessarily expected to be stable across kernel releases and searching for parents by their subsystem should make sysfs users tolerant for changed parent chains. udev 081 ======== Prepare udev to work with the experimental kernel patch, that moves /sys/class devices to /sys/devices and /sys/block to /sys/class/block. Clarify BUS, ID, $id usage and fix $id behavior. This prepares for moving the class devices to /sys/devices. Thanks again to Marco for help finding a hopefully nice compromise to make %b simpler and working again. udev 080 ======== Complete removal of libsysfs, replaced by simple helper functions which are much simpler and a bit faster. The udev daemon operatesentirely on event parameters and does not use sysfs for simple rules anymore. Please report any new bugs/problems, that may be caused by this big change. They will be fixed immediately. The enumeration format character '%e' is deprecated and will be removed sometimes from a future udev version. It never worked correctly outside of udevstart, so we can't use it with the new parallel coldplug. A simple enumeration is as useless as the devfs naming scheme, just get rid of both if you still use it. MODALIAS and $modalias is not needed and will be removed from one of the next udev versions, replace it in all rules with ENV{MODALIAS} or the sysfs "modalias" value. Thanks a lot to Marco for all his help on finding and fixing bugs. udev 079 ======== Let scsi_id request libata drive serial numbers from page 0x80. Renamed etc/udev/persistent.rules to persistent-disk.rules and added /dev/disk/by-name/* for device mapper device names. Removed %e from the man page. It never worked reliably outside of udevstart and udevstart is no longer recommended to use. udev 078 ======== Symlinks are now exported to the event environment. Hopefully it's no longer needed to run udevinfo from an event process, like it was mentioned on the hotplug list: UDEV [1134776873.702967] add@/block/sdb ... DEVNAME=/dev/sdb DEVLINKS=/dev/disk/by-id/usb-IBM_Memory_Key_0218B301030027E8 /dev/disk/by-path/usb-0218B301030027E8:0:0:0 udev 077 ======== Fix a problem if udevsend is used as the hotplug handler and tries to use syslog, which causes a "vc" event loop. 2.6.15 will make udevsend obsolete and this kind of problems will hopefully go away soon. udev 076 ======== All built-in logic to work around bad sysfs timing is removed with this version. The need to wait for sysfs files is almost fixed with a kernel version that doesn't work with this udev version anyway. Until we fix the timing of the "bus" link creation, the former integrated logic should be emulated by a rule placed before all other rules: ACTION=="add", DEVPATH=="/devices/*", ENV{PHYSDEVBUS}=="?*", WAIT_FOR_SYSFS="bus" The option "udev_db" does no longer exist. All udev state will be in /$udev_root/.udev/ now, there is no longer an option to set this to anything else. If the init script or something else used this value, just depend on this hardcoded path. But remember _all_content_ of this directory is still private to udev and can change at any time. Default location for rule sripts and helper programs is now: /lib/udev/. Everything that is not useful on the commandline should go into this directory. Some of the helpers in the extras folder are installed there now. The rules need to be changed, to find the helpers there. Also /lib/udev/devices is recommended as a directory where packages or the user can place real device nodes, which get copied over to /dev at every boot. This should replace the various solutions with custom config files. Udevsend does no longer start the udev daemon. This must be done with the init script that prepares /dev on tmpfs and creates the initial nodes, before starting the daemon. udev 075 ======== Silent a too verbose error logging for the old hotplug.d/ dev.d/ emulation. The copy of klibc is removed. A systemwide installed version of klibc should be used to build a klibc udev now. udev 074 ======== NAME="" will not create any nodes, but execute RUN keys. To completely ignore an event the OPTION "ignore_device" should be used. After removal of the reorder queue, events with a TIMEOUT can be executed without any queuing now. udev 073 ======== Fixed bug in udevd, if inotify is not available. We depend on netlink uevents now, kernels without that event source will not work with that version of udev anymore. udev 072 ======== The rule parsing happens now in the daemon once at startup, all udev event processes inherit the already parsed rules from the daemon. It is shipped with SUSE10.0 and reduces heavily the system load at startup. The option to save precompiled rules and let the udev process pick the them up is removed, as it's no longer needed. Kernel 2.6.15 will have symlinks at /class/input pointing to the real device. Libsysfs is changed to "translate" the requested link into the real device path, as it would happen with the hotplug event. Otherwise device removal and the udev database will not work. Using 'make STRIPCMD=' will leave the binaries unstripped for debugging and packaging. A few improvements for vol_id, the filesytem probing code. udev 071 ======== Fix a stupid typo in extras/run_directory for "make install". scsi_id creates the temporary devnode now in /dev for usage with a non-writable /tmp directory. The uevent kernel socket buffer can carry app. 50.000 events now, let's see who can break this again. :) The upcoming kernel will have a new input driver core integration. Some class devices are now symlinks to the real device. libsysfs needs a fix for this to work correctly. Udevstart of older udev versions will _not_ create these devices! udev 070 ======== Fix a 'install' target in the Makefile, that prevents EXTRAS from beeing installed. udev 069 ======== A bunch of mostly trivial bugfixes. From now on no node name or symlink name can contain any character than plain whitelisted ascii characters or validated utf8 byte-streams. This is needed for the /dev/disk/by-label/* links, because we import untrusted data and export it to the filesystem. udev 068 ======== More bugfixes. If udevd was started from the kernel, we don't have stdin/stdout/stderr, which broke the forked tools in some situations. udev 067 ======== Bugfix. udevstart event ordering was broken for a long time. The new run_program() uncovered it, because /dev/null was not available while we try to run external programs. Now udevstart should create it before we run anything. udev 066 ======== Minor bugfixes and some distro rules updates. If you don't have the persistent disk rules in /dev/disk/by-*/* on your distro, just grab it from here. :) udev 065 ======== We can use socket communication now to pass events from udev to other programs: RUN+="socket:/org/freedesktop/hal/udev_event" will pass the whole udev event to the HAL daemon without the need for a forked helper. (See ChangeLog for udevmonitor, as an example) udev 064 ======== Mostly bugfixes and see ChangeLog. The test for the existence of an environment value should be switched from: ENV{KEY}=="*" to ENV{KEY}=="?*" because "*" will not fail anymore, if the key does not exist or is empty. udev 063 ======== Bugfixes and a few tweaks described in the ChangeLog. udev 062 ======== Mostly a Bugfix release. Added WAIT_FOR_SYSFS="<attribute>" to be able to fight against the sysfs timing with custom rules. udev 061 ======== We changed the internal rule storage format. Our large rule files took 2 MB of RAM, with the change we are down to 99kB. If the device-node has been created with default name and no symlink or options are to remenber, it is not longer stored in the udevdb. HAL will need to be updated to work correctly with that change. To overrride optimization flags, OPTFLAGS may be used now. udev 060 ======== Bugfix release. udev 059 ======== Major changes happened with this release. The goal is to take over the complete kernel-event handling and provide a more efficient way to dispatch kernel events. Replacing most of the current shell script logic and the kernel forked helper with a netlink-daemon and a rule-based event handling. o udevd listens to netlink events now. The first valid netlink event will make udevd ignore any message from udevsend that contains a SEQNUM, to avoid duplicate events. The forked events can be disabled with: echo "" > /proc/sys/kernel/hotplug For full support, the broken input-subsytem needs to be fixed, not to bypass the driver core. o /etc/dev.d/ + /etc/hotplug.d/ directory multiplexing is completely removed from udev itself and must be emulated by calling small helper binaries provided in the extras folder: make EXTRAS=extras/run_directory/ will build udev_run_devd and udev_run_hotplugd, which can be called from a rule if needed: RUN+="/sbin/udev_run_hotplugd" The recommended way to handle this is to convert all the calls from the directories to explicit udev rules and get completely rid of the multiplexing. (To catch a ttyUSB event, you now no longer need to fork and exit 300 tty script instances you are not interested in, it is just one rule that matches exactly the device.) o udev handles now _all_ events not just events for class and block devices, this way it is possible to control the complete event behavior with udev rules. Especially useful for rules like: ACTION="add", DEVPATH="/devices/*", MODALIAS=="?*", RUN+="/sbin/modprobe $modalias" o As used in the modalias rule, udev supports now textual substitution placeholder along with the usual format chars. This needs to be documented, for now it's only visible in udev_rules_parse.c. o The rule keys support now more operations. This is documented in the man page. It is possible to add values to list-keys like the SYMLINK and RUN list with KEY+="value" and to clear the list by assigning KEY="". Also "final"-assignments are supported by using KEY:="value", which will prevent changing the key by any later rule. o kernel 2.6.12 has the "detached_state" attribute removed from sysfs, which was used to recognize sysfs population. We switched that to wait for the "bus" link, which is only available in kernels after 2.6.11. Running this udev version on older kernels may cause a short delay for some events. o To provide infrastructure for persistent device naming, the id programs: scsi_id, vol_id (former udev_volume_id), and ata_id (new) are able now to export the probed data in environment key format: pim:~ # /sbin/ata_id --export /dev/hda ID_MODEL=HTS726060M9AT00 ID_SERIAL=MRH401M4G6UM9B ID_REVISION=MH4OA6BA The following rules: KERNEL="hd*[!0-9]", IMPORT="/sbin/ata_id --export $tempnode" KERNEL="hd*[!0-9]", ENV{ID_SERIAL}=="?*", SYMLINK+="disk/by-id/$env{ID_MODEL}_$env{ID_SERIAL}" Will create: kay@pim:~> tree /dev/disk /dev/disk |-- by-id | |-- HTS726060M9AT00_MRH401M4G6UM9B -> ../../hda | `-- IBM-Memory_Key -> ../../sda |-- by-label | |-- swap -> ../../hda1 | |-- date -> ../../sda1 | `-- home -> ../../hda3 `-- by-uuid |-- 2E08712B0870F2E7 -> ../../hda3 |-- 9352cfef-7687-47bc-a2a3-34cf136f72e1 -> ../../hda1 |-- E845-7A89 -> ../../sda1 `-- b2a61681-3812-4f13-a4ff-920d70604299 -> ../../hda2 The IMPORT= operation will import these keys in the environment and make it available for later PROGRAM= and RUN= executed programs. The keys are also stored in the udevdb and can be queried from there with one of the next udev versions. o A few binaries are silently added to the repository, which can be used to replay kernel events from initramfs instead of using coldplug. udevd can be instructed now to queue-up events while the stored events from initramfs are filled into the udevd-queue. This code is still under development and there is no documentation now besides the code itself. The additional binaries get compiled, but are not installed by default. o There is also a temporary fix for a performance problem where too many events happen in parallel and every event needs to parse the rules. udev can now read precompiled rules stored on disk. This is likely to be replaced by a more elegant solution in a future udev version. udev 058 ======== With kernel version 2.6.12, the sysfs file "detached_state" was removed. Fix for libsysfs not to expect this file was added. udev 057 ======== All rules are applied now, but only the first matching rule with a NAME-key will be applied. All later rules with NAME-key are completely ignored. This way system supplied symlinks or permissions gets applied to user-defined naming rules. Note: Please check your rules setup, if you may need to add OPTIONS="last_rule" to some rules, to keep the old behavior. The rules are read on "remove"-events too. That makes is possible to match with keys that are available on remove (KERNEL, SUBSYSTEM, ID, ENV, ...) to instruct udev to ignore an event (OPTIONS="ignore_device"). The new ACTION-key may be used to let a rule act only at a "remove"-event. The new RUN-key supports rule-based execution of programs after device-node handling. This is meant as a general replacement for the dev.d/-directories to give fine grained control over the execution of programs. The %s{}-sysfs format char replacement values are searched at any of the devices in the device chain now, not only at the class-device. We support log priority levels now. The value udev_log in udev.conf is used to determine what is printed to syslog. This makes it possible to run a version with compiled-in debug messages in a production environment which is sometimes needed to find a bug. It is still possible to supress the inclusion of _any_ syslog usage with USE_LOG=false to create the smallest possible binaries if needed. The configured udev_log value can be overridden with the environment variable UDEV_LOG. udev 056 ======== Possible use of a system-wide klibc: make USE_KLIBC=true KLCC=/usr/bin/klcc all will link against an external klibc and our own version will be ignored. udev 055 ======== We support an unlimited count of symlinks now. If USE_STATIC=true is passed to a glibc build, we link statically and use a built-in userdb parser to resolve user and group names. The PLACE= key is gone. It can be replaced by an ID= for a long time, because we walk up the chain of physical devices to find a match. The KEY="<value>" format supports '=', '==', '!=,' , '+=' now. This makes it easy to skip certain attribute matches without composing rules with weird character class negations like: KERNEL="[!s][!c][!d]*" this can now be replaced with: KERNEL!="scd*" The current simple '=' is still supported, and should work as it does today, but existing rules should be converted if possible, to be better readable. We have new ENV{}== key now, to match against a maximum of 5 environment variables. udevstart is its own binary again, because we don't need co carry this araound with every forked event. |