OpenZFS on Linux and FreeBSD
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Alyssa Ross f15ec889a9 Return required size when encode_fh size too small
Quoting <linux/exportfs.h>:

> encode_fh() should return the fileid_type on success and on error
> returns 255 (if the space needed to encode fh is greater than
> @max_len*4 bytes). On error @max_len contains the minimum size (in 4
> byte unit) needed to encode the file handle.

ZFS was not setting max_len in the case where the handle was too
small.  As a result of this, the `t_name_to_handle_at.c' example in
name_to_handle_at(2) did not work on ZFS.

zfsctl_fid() will itself set max_len if called with a fid that is too
small, so if we give zfs_fid() that behavior as well, the fix is quite
easy: if the handle is too small, just use a zero-size fid instead of
the handle.

Tested by running t_name_to_handle_at on a normal file, a directory, a
.zfs directory, and a snapshot.

Thanks-to: Puck Meerburg <puck@puckipedia.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Closes #11995
2021-05-10 12:13:45 -07:00
.github CI: Increase free space in workflow 2021-04-07 13:24:28 -07:00
cmd zed.d/zed-functions.sh: fix zed_guid_to_pool() on dash 2021-05-10 12:12:20 -07:00
config Add SIGSTOP and SIGTSTP handling to issig 2021-04-19 15:12:33 -07:00
contrib contrib/dracut: 90: zfs-{rollback,snapshot}-bootfs: use @sbindir@ 2021-04-19 15:22:57 -07:00
etc etc/systemd/zfs-mount-generator: don't fail if no cached pools 2021-04-19 15:22:58 -07:00
include FreeBSD: Prune some unneeded definitions 2021-05-10 12:09:34 -07:00
lib libzutil: fix dm_get_underlying_path() return if not a DM device 2021-05-10 12:10:20 -07:00
man Updated zfs_dbgmsg_enable documentation to be more accurate 2021-05-10 12:13:03 -07:00
module Return required size when encode_fh size too small 2021-05-10 12:13:45 -07:00
rpm zfs.spec.in: remove post ldconfig scriptlets 2021-05-10 12:07:16 -07:00
scripts Add kmodtool fix to detect different System.map location 2021-04-14 13:19:49 -07:00
tests ZTS: Fix xattr_002_neg passing too soon 2021-05-10 12:09:42 -07:00
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 .gitmodules: link to openzfs github repository 2021-04-14 13:23:08 -07:00
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 2020-10-08 20:10:13 -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 2.1.0-rc4 2021-04-22 14:54:35 -07:00
Makefile.am Fix 'make checkbashisms` warnings 2021-04-19 15:12:28 -07:00
NEWS Fix NEWS file 2020-08-26 21:44:41 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Update FreeBSD versions 2021-03-16 15:03:28 -07:00
RELEASES.md Add RELEASES.md file 2021-04-07 13:26:58 -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 2021-03-16 15:00:14 -07:00
copy-builtin Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -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 any supported branches and releases starting from 12.2-RELEASE.