mirror_zfs/udev/rules.d/90-zfs.rules.in

SUBSYSTEM!="block|misc", GOTO="zfs_end"
ACTION!="add|change", GOTO="zfs_end"

ENV{ID_FS_TYPE}=="zfs", RUN+="/sbin/modprobe zfs"
ENV{ID_FS_TYPE}=="zfs_member", RUN+="/sbin/modprobe zfs"

KERNEL=="null", SYMLINK+="root"
SYMLINK=="null", SYMLINK+="root"

KERNEL=="zfs", MODE="0666", OPTIONS+="static_node=zfs"

LABEL="zfs_end"
Open pools asynchronously after module load One of the side effects of calling zvol_create_minors() in zvol_init() is that all pools listed in the cache file will be opened. Depending on the state and contents of your pool this operation can take a considerable length of time. Doing this at load time is undesirable because the kernel is holding a global module lock. This prevents other modules from loading and can serialize an otherwise parallel boot process. Doing this after module inititialization also reduces the chances of accidentally introducing a race during module init. To ensure that /dev/zvol/<pool>/<dataset> devices are still automatically created after the module load completes a udev rules has been added. When udev notices that the /dev/zfs device has been create the 'zpool list' command will be run. This then will cause all the pools listed in the zpool.cache file to be opened. Because this process in now driven asynchronously by udev there is the risk of problems in downstream distributions. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #756 Issue #1020 Issue #1234 2013-07-02 22:59:51 +04:00			`SUBSYSTEM!="block\|misc", GOTO="zfs_end"`
Add dracut support To simplify the process of using zfs as your root filesystem a zfs-drucat sub-package has been added. This sub-package adds a zfs dracut module which allows your initramfs to be rebuilt with zfs support. The process for doing this is still complicated but there is clearly interest from the community about getting this working well and documented. This should help lay some of the groundwork. Longer term these changes should be pushed in the upstream dracut package. Once that occurs this subpackage will no longer be required for new systems, however we may want to conditionally build this package in the future for systems running older dracut versions. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> 2011-03-18 01:18:13 +03:00			`ACTION!="add\|change", GOTO="zfs_end"`

			`ENV{ID_FS_TYPE}=="zfs", RUN+="/sbin/modprobe zfs"`
			`ENV{ID_FS_TYPE}=="zfs_member", RUN+="/sbin/modprobe zfs"`

Update for Dracut-010 Update Dracut module for Dracut-010 and fix race conditions that caused boot to fail on MP systems. Add support for zfs_force flag and parsing of spl_hostid from kernel command line. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> 2011-07-04 21:25:31 +04:00			`KERNEL=="null", SYMLINK+="root"`
			`SYMLINK=="null", SYMLINK+="root"`

Add kernel module auto-loading Historically a dynamic misc minor number was registered for the /dev/zfs device in order to prevent minor number collisions. This was fine but it prevented us from being able to use the kernel module auto-loaded which requires a known reserved value. Resolve this issue by adding a configure test to find an available misc minor number which can then be used in MODULE_ALIAS_MISCDEV at build time. By adding this alias the zfs kmod is added to the list of known static-nodes and the systemd-tmpfiles-setup-dev service will create a /dev/zfs character device at boot time. This in turn allows us to update the 90-zfs.rules file to make it aware this is a static node. The upshot of this is that whenever a process (zpool, zfs, zed) opens the /dev/zfs the kmods will be automatic loaded. This even works for unprivileged users so there is no longer a need to manually load the modules at boot time. As an additional bonus the zed now no longer needs to start after the zfs-import.service since it will trigger the module load. In the unlikely event the minor number we selected conflicts with another out of tree unregistered minor number the code falls back to dynamically allocating it. In this case the modules again must be manually loaded. Note that due to the change in the method of registering the minor number the zimport.sh test case may incorrectly fail when the static node for the installed packages is created instead of the dynamic one. This issue will only transiently impact zimport.sh for this single commit when we transition and are mixing and matching methods. Reviewed-by: Fabian Grünbichler <f.gruenbichler@proxmox.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> TEST_ZIMPORT_SKIP="yes" Closes #7287 2018-03-13 20:45:55 +03:00			`KERNEL=="zfs", MODE="0666", OPTIONS+="static_node=zfs"`
Open pools asynchronously after module load One of the side effects of calling zvol_create_minors() in zvol_init() is that all pools listed in the cache file will be opened. Depending on the state and contents of your pool this operation can take a considerable length of time. Doing this at load time is undesirable because the kernel is holding a global module lock. This prevents other modules from loading and can serialize an otherwise parallel boot process. Doing this after module inititialization also reduces the chances of accidentally introducing a race during module init. To ensure that /dev/zvol/<pool>/<dataset> devices are still automatically created after the module load completes a udev rules has been added. When udev notices that the /dev/zfs device has been create the 'zpool list' command will be run. This then will cause all the pools listed in the zpool.cache file to be opened. Because this process in now driven asynchronously by udev there is the risk of problems in downstream distributions. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #756 Issue #1020 Issue #1234 2013-07-02 22:59:51 +04:00
Add dracut support To simplify the process of using zfs as your root filesystem a zfs-drucat sub-package has been added. This sub-package adds a zfs dracut module which allows your initramfs to be rebuilt with zfs support. The process for doing this is still complicated but there is clearly interest from the community about getting this working well and documented. This should help lay some of the groundwork. Longer term these changes should be pushed in the upstream dracut package. Once that occurs this subpackage will no longer be required for new systems, however we may want to conditionally build this package in the future for systems running older dracut versions. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> 2011-03-18 01:18:13 +03:00			`LABEL="zfs_end"`