Add a command that disables a pNFS server mirrored DS.
This command can be used by a sysadmin to disable a malfunctioning pNFS server mirrored DS. It is safe to use when a mirrored DS has already been disabled via an I/O or network partitioning error.
This commit is contained in:
Rick Macklem
parent
cfba8dec89
commit
b3cd498b58
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=335192
6
usr.sbin/pnfsdskill/Makefile
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6
usr.sbin/pnfsdskill/Makefile
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# $FreeBSD$
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PROG= pnfsdskill
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MAN= pnfsdskill.8
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.include <bsd.prog.mk>
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64
usr.sbin/pnfsdskill/pnfsdskill.8
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64
usr.sbin/pnfsdskill/pnfsdskill.8
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.\" Copyright (c) 2018 Rick Macklem
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 9, 2018
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.Dt PNFSDSKILL 8
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.Os
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.Sh NAME
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.Nm pnfsdskill
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.Nd
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disables a pNFS data storage server (DS)
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.Sh SYNOPSIS
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.Nm
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.Ar mounted-on-DS-dir
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.Sh DESCRIPTION
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The
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.Nm
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command disables one DS when mirroring is enabled.
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If one mirrored DS is malfunctioning, a system administrator
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may use this command on the metadata server (MDS) to disable use of this mirror.
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This command must be used on the MDS and the
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.Ar mounted-on-DS-dir
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must be the exact pathname used when mounting the DS on the MDS.
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.Pp
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If this command fails with
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.Dq Device not configured
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(ENXIO), it probably
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means that the DS has already been disabled due to an error either detected
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by the MDS or reported to the MDS by a client.
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.Pp
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The pNFS service should continue to run normally so long as the number of
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operational DSs is at least as many as the level of mirroring.
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.El
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.Sh SEE ALSO
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.Xr nfsv4 4 ,
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.Xr pnfs 4 ,
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.Xr nfsd 8 ,
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.Xr pnfsdscopymr 8 ,
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.Xr pnfsdsfile 8
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.Sh HISTORY
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The
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.Nm
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command appeared in FreeBSD12.
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76
usr.sbin/pnfsdskill/pnfsdskill.c
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76
usr.sbin/pnfsdskill/pnfsdskill.c
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2017 Rick Macklem
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <nfs/nfssvc.h>
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#include <fs/nfs/nfsproto.h>
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#include <fs/nfs/nfskpiport.h>
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#include <fs/nfs/nfs.h>
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static void usage(void);
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/*
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* This program disables use of a DS mirror. The "dspath" command line
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* argument must be an exact match for the mounted-on path of the DS.
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* It should be done before any forced dismount is performed on the path
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* and should work even when the mount point is hung.
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*/
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int
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main(int argc, char *argv[])
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{
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struct nfsd_pnfsd_args pnfsdarg;
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if (argc != 2)
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usage();
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if (geteuid() != 0)
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errx(1, "Must be run as root/su");
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pnfsdarg.op = PNFSDOP_DELDSSERVER;
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pnfsdarg.dspath = argv[1];
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if (nfssvc(NFSSVC_PNFSDS, &pnfsdarg) < 0)
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err(1, "Can't kill %s", argv[1]);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "pnfsdsfile [filepath]\n");
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exit(1);
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}
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