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Serapheim Dimitropoulos 7637ef8d23 OpenZFS 9591 - ms_shift can be incorrectly changed 
ms_shift can be incorrectly changed changed in MOS config for
indirect vdevs that have been historically expanded

According to spa_config_update() we expect new vdevs to have
vdev_ms_array equal to 0 and then we go ahead and set their metaslab
size. The problem is that indirect vdevs also have vdev_ms_array == 0
because their metaslabs are destroyed once their removal is done.

As a result, if a vdev was expanded and then removed may have its
ms_shift changed if another vdev was added after its removal.
Fortunately this behavior does not cause any type of crash or bad
behavior in the kernel but it can confuse zdb and anyone doing any kind
of analysis of the history of the pools.

Authored by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@zfsmail.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Prashanth Sreenivasa <pks@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Ported-by: Tim Chase <tim@chase2k.com>

OpenZFS-commit: https://github.com/openzfs/openzfs/pull/651
OpenZFS-issue: https://illumos.org/issues/9591a
External-issue: DLPX-58879
Closes #7644
2018-06-21 09:35:26 -07:00
.github Small cleanup of PR and issue templates 2018-05-15 09:02:57 -07:00
cmd Fix typo in comment, handeling->handling 2018-06-18 21:51:06 -07:00
config Linux 4.14 compat: blk_queue_stackable() 2018-06-19 21:52:45 -07:00
contrib Add pyzfs build directories to gitignore 2018-06-11 18:42:12 -07:00
etc Minor documentation, logging, and testing typos 2018-06-07 09:38:39 -07:00
include Linux 4.14 compat: blk_queue_stackable() 2018-06-19 21:52:45 -07:00
lib Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
man Add tunables for channel programs 2018-06-15 15:10:42 -07:00
module OpenZFS 9591 - ms_shift can be incorrectly changed 2018-06-21 09:35:26 -07:00
rpm Update build system and packaging 2018-05-29 16:00:33 -07:00
scripts ZTS: Adopt OpenZFS test analysis script 2018-06-20 14:03:13 -07:00
tests OpenZFS 9591 - ms_shift can be incorrectly changed 2018-06-21 09:35:26 -07:00
udev Add kernel module auto-loading 2018-03-13 10:45:55 -07:00
.gitignore Ignore *.o.ur-safe build artifacts 2018-05-13 18:59:02 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
.travis.yml Add .travis.yml 2017-11-13 09:18:18 -08:00
AUTHORS Update build system and packaging 2018-05-29 16:00:33 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac ZTS: Adopt OpenZFS test analysis script 2018-06-20 14:03:13 -07:00
copy-builtin copy-builtin: SPL must be in Kbuild first 2018-06-15 15:16:29 -07:00
COPYRIGHT Update build system and packaging 2018-05-29 16:00:33 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am make install only works once 2018-05-31 09:19:59 -07:00
META Linux compat 4.18: check_disk_size_change() 2018-06-15 15:05:21 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Explicitly state supported Linux versions 2018-05-30 20:11:19 -07:00
TEST Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

img

ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

codecov coverity

Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported kernel versions.