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When expanding a device zfs needs to rescan the partition table to get the correct size. This can only happen when we're in the kernel and requires the device to be closed. As part of the rescan, udev is notified and the device links are removed and recreated. This leave a window where the vdev code may try to reopen the device before udev has recreated the link. If that happens, then the pool may end up in a suspended state. To correct this, we leverage the BLKPG_RESIZE_PARTITION ioctl which allows the partition information to be modified even while it's in use. This ioctl also does not remove the device link associated with the zfs data partition so it eliminates the race condition that can occur in the kernel. Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: George Wilson <gwilson@delphix.com> Closes #10897 |
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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 Linux distribution can be found at the ZoL Site.
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 12-STABLE and 13-CURRENT.