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We recently had a case where our operators replaced a bad multipathed disk, only to see it fail to autoreplace. The zed logs showed that the multipath replacement disk did not pass the 'is_dm' test in zfs_process_add() even though it should have. is_dm is set if there exists a sysfs entry for to the underlying /dev/sd* paths for the multipath disk. It's possible this path didn't exist due to a race condition where the sysfs paths weren't created at the time the udev event came in to zed, but this was never verified. This patch updates the check to look for udev properties that indicate if the new autoreplace disk is an empty multipath disk, rather than looking for the underlying sysfs entries. It also adds in additional logging, and fixes a bug where zed allowed you to use an already zfs-formatted disk from another pool as a multipath auto-replacement disk. Furthermore, while testing this patch, I also ran across a case where a force-faulted disk did not have a ZPOOL_CONFIG_PHYS_PATH entry in its config. This prevented it from being autoreplaced. I added additional logic to derive the PHYS_PATH from the PATH if the PATH was a /dev/disk/by-vdev/ path. For example, if PATH was /dev/disk/by-vdev/L28, then PHYS_PATH would be L28. This is safe since by-vdev paths represent physical locations and do not change between boots. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tony Hutter <hutter2@llnl.gov> Closes #13023 |
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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.
Official Resources
- Documentation - for using and developing this repo
- ZoL Site - Linux release info & links
- Mailing lists
- OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
Installation
Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.
Contribute & Develop
We have a separate document with contribution guidelines.
We have a Code of Conduct.
Release
OpenZFS is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197
Supported Kernels
- The
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 12.2-RELEASE.