Add a command that copies or migrates a data file from one DS to another.
This command can be used by a sysadmin to either copy or migrate a data file on one DS to another DS. Its main use is to recover data files onto a mirrored DS after the DS has been repaired and brought back online.
This commit is contained in:
rmacklem
parent
815c9f6cea
commit
2c54117502
@ -59,6 +59,7 @@ SUBDIR= adduser \
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nologin \
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pciconf \
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periodic \
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pnfsdscopymr \
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pnfsdsfile \
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pnfsdskill \
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powerd \
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6
usr.sbin/pnfsdscopymr/Makefile
Normal file
6
usr.sbin/pnfsdscopymr/Makefile
Normal file
@ -0,0 +1,6 @@
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# $FreeBSD$
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PROG= pnfsdscopymr
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MAN= pnfsdscopymr.8
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.include <bsd.prog.mk>
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99
usr.sbin/pnfsdscopymr/pnfsdscopymr.8
Normal file
99
usr.sbin/pnfsdscopymr/pnfsdscopymr.8
Normal file
@ -0,0 +1,99 @@
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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 June 2, 2018
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.Dt PNFSDSCOPYMR 8
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.Os
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.Sh NAME
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.Nm pnfsdscopymr
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.Nd
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copy or move a data storage file for a MDS file to a different DS
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.Sh SYNOPSIS
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.Nm
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.Op Fl r Ar mounted-on-DS-dir
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.Op Fl m Ar source-mounted-on-DS-dir destination-mounted-on-DS-dir
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.Ar mdsfile
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.Sh DESCRIPTION
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The
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.Nm
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command copies a data storage file for an MDS file from one DS to another DS.
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It is normally used to recover data files onto a repaired DS, but can also
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be used to manually migrate a data storage file from one DS to a different one.
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By default, the command will copy the data storage file for
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.Dq mdsfile
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to one of the other DSs to create a mirror of it.
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This might be done if the file was created before mirroring was enabled on
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the pNFS service and now needs to be mirrored.
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.Pp
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The following options are available:
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.Bl -tag -width Ds
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.It Fl r Ar mounted-on-DS-dir
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This option indicates that the data storage file should be created on the DS
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that is mounted on the directory
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.Dq mounted-on-DS-dir .
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It will only do the copy if there is an entry in the pnfsd.dsfile extended
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attribute that has an IP address of 0.0.0.0.
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See
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.Xr pnfsdsfile 1
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for how to do this.
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This is normally done for all regular files via
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.Xr find 1
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in order to recover the data
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storage files onto a repaired DS.
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.It Fl m Ar source-mounted-on-DS-dir destination-mounted-on-DS-dir
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This option indicates that the data storage file is to be migrated from
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the source DS mounted on the diectory
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.Dq source-mounted-on-DS-dir
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to the DS mounted on the directory
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.Dq destination-mounted-on-DS-dir .
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In this case, the data storage file will be removed from the source DS
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when the copy is completed.
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.El
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If the copy/migration is already done, the command will simply exit(0),
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so that it can safely be used on all regular files in the exported directory
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tree on the MDS.
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.Pp
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This command must be run on the MDS and a typical usage would be as an
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argument for
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.Xr find 1
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for all regular files.
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.sp
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For example, if the repaired DS is mounted on /data3 and files previously
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stored on the repaired DS have had the DS's IP address set to 0.0.0.0:
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.br
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# cd <top-level-exported-directory-on-the-MDS>
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.br
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# find . -type f -exec pnfsdscopymr -r /data3 {} \\;
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.Sh SEE ALSO
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.Xr find 1 ,
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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 pnfsdsfile 8 ,
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.Xr pnfsdskill 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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311
usr.sbin/pnfsdscopymr/pnfsdscopymr.c
Normal file
311
usr.sbin/pnfsdscopymr/pnfsdscopymr.c
Normal file
@ -0,0 +1,311 @@
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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 <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <sys/param.h>
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#include <sys/extattr.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/sysctl.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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#include <fs/nfs/nfsrvstate.h>
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static void usage(void);
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static struct option longopts[] = {
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{ "migrate", required_argument, NULL, 'm' },
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{ "mirror", required_argument, NULL, 'r' },
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{ NULL, 0, NULL, 0 }
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};
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/*
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* This program creates a copy of the file's (first argument) data on the
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* new/recovering DS mirror. If the file is already on the new/recovering
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* DS, it will simply exit(0).
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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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struct pnfsdsfile dsfile[NFSDEV_MAXMIRRORS];
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struct stat sb;
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struct statfs sf;
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struct addrinfo hints, *res, *nres;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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ssize_t xattrsize, xattrsize2;
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size_t mirlen;
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int ch, fnd, fndzero, i, migrateit, mirrorcnt, mirrorit, ret;
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int mirrorlevel;
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char host[MNAMELEN + NI_MAXHOST + 2], *cp;
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if (geteuid() != 0)
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errx(1, "Must be run as root/su");
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mirrorit = migrateit = 0;
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pnfsdarg.dspath = pnfsdarg.curdspath = NULL;
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while ((ch = getopt_long(argc, argv, "m:r:", longopts, NULL)) != -1) {
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switch (ch) {
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case 'm':
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/* Migrate the file from the second DS to the first. */
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if (mirrorit != 0)
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errx(1, "-r and -m are mutually exclusive");
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migrateit = 1;
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pnfsdarg.curdspath = optarg;
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break;
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case 'r':
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/* Mirror the file on the specified DS. */
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if (migrateit != 0)
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errx(1, "-r and -m are mutually exclusive");
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mirrorit = 1;
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pnfsdarg.dspath = optarg;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (migrateit != 0) {
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if (argc != 2)
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usage();
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pnfsdarg.dspath = *argv++;
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} else if (argc != 1)
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usage();
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/* Get the pNFS service's mirror level. */
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mirlen = sizeof(mirrorlevel);
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ret = sysctlbyname("vfs.nfs.pnfsmirror", &mirrorlevel, &mirlen,
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NULL, 0);
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if (ret < 0)
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errx(1, "Can't get vfs.nfs.pnfsmirror");
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if (pnfsdarg.dspath != NULL && pnfsdarg.curdspath != NULL &&
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strcmp(pnfsdarg.dspath, pnfsdarg.curdspath) == 0)
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errx(1, "Can't migrate to same server");
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/*
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* The host address and directory where the data storage file is
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* located is in the extended attribute "pnfsd.dsfile".
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*/
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xattrsize = extattr_get_file(*argv, EXTATTR_NAMESPACE_SYSTEM,
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"pnfsd.dsfile", dsfile, sizeof(dsfile));
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mirrorcnt = xattrsize / sizeof(struct pnfsdsfile);
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xattrsize2 = mirrorcnt * sizeof(struct pnfsdsfile);
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if (mirrorcnt < 1 || xattrsize != xattrsize2)
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errx(1, "Can't get extattr pnfsd.dsfile for %s", *argv);
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/* See if there is a 0.0.0.0 entry. */
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fndzero = 0;
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for (i = 0; i < mirrorcnt; i++) {
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if (dsfile[i].dsf_sin.sin_family == AF_INET &&
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dsfile[i].dsf_sin.sin_addr.s_addr == 0)
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fndzero = 1;
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}
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/* If already mirrored for default case, just exit(0); */
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if (mirrorit == 0 && migrateit == 0 && (mirrorlevel < 2 ||
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(fndzero == 0 && mirrorcnt >= mirrorlevel) ||
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(fndzero != 0 && mirrorcnt > mirrorlevel)))
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exit(0);
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/* For the "-r" case, there must be a 0.0.0.0 entry. */
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if (mirrorit != 0 && (fndzero == 0 || mirrorlevel < 2 ||
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mirrorcnt < 2 || mirrorcnt > mirrorlevel))
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exit(0);
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/* For pnfsdarg.dspath set, if it is already in list, just exit(0); */
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if (pnfsdarg.dspath != NULL) {
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/* Check the dspath to see that it's an NFS mount. */
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if (stat(pnfsdarg.dspath, &sb) < 0)
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errx(1, "Can't stat %s", pnfsdarg.dspath);
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if (!S_ISDIR(sb.st_mode))
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errx(1, "%s is not a directory", pnfsdarg.dspath);
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if (statfs(pnfsdarg.dspath, &sf) < 0)
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errx(1, "Can't fsstat %s", pnfsdarg.dspath);
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if (strcmp(sf.f_fstypename, "nfs") != 0)
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errx(1, "%s is not an NFS mount", pnfsdarg.dspath);
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if (strcmp(sf.f_mntonname, pnfsdarg.dspath) != 0)
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errx(1, "%s is not the mounted-on dir for the new DS",
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pnfsdarg.dspath);
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/*
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* Check the IP address of the NFS server against the entrie(s)
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* in the extended attribute.
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*/
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strlcpy(host, sf.f_mntfromname, sizeof(host));
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cp = strchr(host, ':');
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if (cp == NULL)
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errx(1, "No <host>: in mount %s", host);
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*cp = '\0';
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if (getaddrinfo(host, NULL, &hints, &res) != 0)
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errx(1, "Can't get address for %s", host);
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for (i = 0; i < mirrorcnt; i++) {
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nres = res;
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while (nres != NULL) {
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if (dsfile[i].dsf_sin.sin_family ==
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nres->ai_family) {
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/*
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* If there is already an entry for this
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* DS, just exit(0), since copying isn't
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* required.
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*/
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if (nres->ai_family == AF_INET &&
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nres->ai_addrlen >= sizeof(sin)) {
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memcpy(&sin, nres->ai_addr,
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sizeof(sin));
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if (sin.sin_addr.s_addr ==
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dsfile[i].dsf_sin.sin_addr.s_addr)
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exit(0);
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} else if (nres->ai_family ==
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AF_INET6 && nres->ai_addrlen >=
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sizeof(sin6)) {
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memcpy(&sin6, nres->ai_addr,
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sizeof(sin6));
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if (IN6_ARE_ADDR_EQUAL(&sin6.sin6_addr,
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&dsfile[i].dsf_sin6.sin6_addr))
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exit(0);
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}
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}
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nres = nres->ai_next;
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}
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}
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freeaddrinfo(res);
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}
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/* For "-m", the pnfsdarg.curdspath must be in the list. */
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if (pnfsdarg.curdspath != NULL) {
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/* Check pnfsdarg.curdspath to see that it's an NFS mount. */
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if (stat(pnfsdarg.curdspath, &sb) < 0)
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errx(1, "Can't stat %s", pnfsdarg.curdspath);
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if (!S_ISDIR(sb.st_mode))
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errx(1, "%s is not a directory", pnfsdarg.curdspath);
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if (statfs(pnfsdarg.curdspath, &sf) < 0)
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errx(1, "Can't fsstat %s", pnfsdarg.curdspath);
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if (strcmp(sf.f_fstypename, "nfs") != 0)
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errx(1, "%s is not an NFS mount", pnfsdarg.curdspath);
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if (strcmp(sf.f_mntonname, pnfsdarg.curdspath) != 0)
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errx(1, "%s is not the mounted-on dir of the cur DS",
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pnfsdarg.curdspath);
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/*
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* Check the IP address of the NFS server against the entrie(s)
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* in the extended attribute.
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*/
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strlcpy(host, sf.f_mntfromname, sizeof(host));
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cp = strchr(host, ':');
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if (cp == NULL)
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errx(1, "No <host>: in mount %s", host);
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*cp = '\0';
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if (getaddrinfo(host, NULL, &hints, &res) != 0)
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errx(1, "Can't get address for %s", host);
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fnd = 0;
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for (i = 0; i < mirrorcnt && fnd == 0; i++) {
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nres = res;
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while (nres != NULL) {
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if (dsfile[i].dsf_sin.sin_family ==
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nres->ai_family) {
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/*
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* Note if the entry is found.
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*/
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if (nres->ai_family == AF_INET &&
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nres->ai_addrlen >= sizeof(sin)) {
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memcpy(&sin, nres->ai_addr,
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sizeof(sin));
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if (sin.sin_addr.s_addr ==
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dsfile[i].dsf_sin.sin_addr.s_addr) {
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fnd = 1;
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break;
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}
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} else if (nres->ai_family ==
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AF_INET6 && nres->ai_addrlen >=
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sizeof(sin6)) {
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memcpy(&sin6, nres->ai_addr,
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sizeof(sin6));
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if (IN6_ARE_ADDR_EQUAL(&sin6.sin6_addr,
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&dsfile[i].dsf_sin6.sin6_addr)) {
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fnd = 1;
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break;
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}
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}
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}
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nres = nres->ai_next;
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}
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}
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freeaddrinfo(res);
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/*
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* If not found just exit(0), since it is not on the
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* source DS.
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*/
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if (fnd == 0)
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exit(0);
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}
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/* Do the copy via the nfssvc() syscall. */
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pnfsdarg.op = PNFSDOP_COPYMR;
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pnfsdarg.mdspath = *argv;
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ret = nfssvc(NFSSVC_PNFSDS, &pnfsdarg);
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if (ret < 0 && errno != EEXIST)
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err(1, "Copymr failed args %s, %s", argv[1], argv[2]);
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exit(0);
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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, "pnfsdscopymr [-r recovered-DS-mounted-on-path] "
|
||||
"[-m soure-DS-mounted-on-path destination-DS-mounted-on-path] "
|
||||
"mds-filename");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user