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Address the following bugs in persistent error log: 1) Check nested clones, eg "fs->snap->clone->snap2->clone2". 2) When deleting files containing error blocks in those clones (from "clone" the example above), do not break the check chain. 3) When deleting files in the originating fs before syncing the errlog to disk, do not break the check chain. This happens because at the time of introducing the error block in the error list, we do not have its birth txg and the head filesystem. If the original file is deleted before the error list is synced to the error log (which is when we actually lookup the birth txg and the head filesystem), then we do not have access to this info anymore and break the check chain. The most prominent change is related to achieving (3). We expand the spa_error_entry_t structure to accommodate the newly introduced zbookmark_err_phys_t structure (containing the birth txg of the error block).Due to compatibility reasons we cannot remove the zbookmark_phys_t structure and we also need to place the new structure after se_avl, so it is not accounted for in avl_find(). Then we modify spa_log_error() to also provide the birth txg of the error block. With these changes in place we simplify the previously introduced function get_head_and_birth_txg() (now named get_head_ds()). We chose not to follow the same approach for the head filesystem (thus completely removing get_head_ds()) to avoid introducing new lock contentions. The stack sizes of nested functions (as measured by checkstack.pl in the linux kernel) are: check_filesystem [zfs]: 272 (was 912) check_clones [zfs]: 64 We also introduced two new tests covering the above changes. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: George Amanakis <gamanakis@gmail.com> Closes #14633 |
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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.