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OpenZFS on Linux and FreeBSD
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Rich Ercolani 2ef1ce66f5 Handle partial reads in zfs_read 
Currently, dmu_read_uio_dnode can read 64K of a requested 1M in one
loop, get EFAULT back from zfs_uiomove() (because the iovec only holds
64k), and return EFAULT, which turns into EAGAIN on the way out. EAGAIN
gets interpreted as "I didn't read anything", the caller tries again
without consuming the 64k we already read, and we're stuck.

This apparently works on newer kernels because the caller which breaks
on older Linux kernels by happily passing along a 1M read request and a
64k iovec just requests 64k at a time.

With this, we now won't return EFAULT if we got a partial read.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #12370 
Closes #12509
Closes #12516
 		2021-11-12 16:31:55 -08:00
.github Update `checkstyle` workflow env to ubuntu-20.04 2021-11-12 16:31:55 -08:00
cmd Remove UIO_ZEROCOPY functions structures 2021-11-12 16:31:55 -08:00
config Use fallthrough macro 2021-11-12 15:24:36 -08:00
contrib gcc 11 cleanup 2021-11-12 15:24:36 -08:00
etc zfs-import-{cache,scan}: change condition to FileNotEmpty 2021-02-05 11:42:40 -08:00
include Cleaning up uio headers 2021-11-12 16:31:55 -08:00
lib Extending FreeBSD UIO Struct 2021-11-12 16:31:55 -08:00
man vdev_id.conf.5: modernise 2021-11-12 16:31:55 -08:00
module Handle partial reads in zfs_read 2021-11-12 16:31:55 -08:00
rpm Correct a flaw in the Python 3 version checking 2021-11-12 15:24:36 -08:00
scripts DKMS: Disable weak modules 2020-12-23 14:34:59 -08:00
tests Extending FreeBSD UIO Struct 2021-11-12 16:31:55 -08:00
udev Centralize variable substitution 2020-07-14 17:33:44 -07:00
.editorconfig Add an .editorconfig; document git whitespace settings 2020-01-27 13:32:52 -08:00
.gitignore Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add zstd support to zfs 2020-08-20 10:30:06 -07:00
CODE_OF_CONDUCT.md Replace ZFS on Linux references with OpenZFS 2020-10-16 13:01:24 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
META Tag zfs-2.0.6 2021-09-22 15:19:08 -07:00
Makefile.am cppcheck: integrete cppcheck 2021-06-23 13:22:15 -07:00
NEWS Fix NEWS file 2020-08-27 16:07:01 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md docs: update README's installation link 2020-10-16 13:00:13 -07:00
TEST Remove CI builder customization from TEST 2020-03-16 10:46:03 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
configure.ac ZTS: Add tests for DOS mode attributes 2021-06-23 13:22:14 -07:00
copy-builtin Replace ZFS on Linux references with OpenZFS 2020-10-16 13:01:24 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

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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.

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Official Resources

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 META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are 12-STABLE and 13-CURRENT.