/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2017 Rick Macklem
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
#include <err.h>
#include <getopt.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/extattr.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <fs/nfs/nfskpiport.h>
#include <fs/nfs/nfsproto.h>
#include <fs/nfs/nfs.h>
#include <fs/nfs/nfsrvstate.h>
static void usage(void) __dead2;
static struct option longopts[] = {
{ "changeds", required_argument, NULL, 'c' },
{ "mirror", required_argument, NULL, 'm' },
{ "quiet", no_argument, NULL, 'q' },
{ "zerods", required_argument, NULL, 'r' },
{ "ds", required_argument, NULL, 's' },
{ "zerofh", no_argument, NULL, 'z' },
{ NULL, 0, NULL, 0 }
};
/*
* This program displays the location information of a data storage file
* for a given file on a MetaData Server (MDS) in a pNFS service. This program
* must be run on the MDS and the file argument must be a file in a local
* file system that has been exported for the pNFS service.
*/
int
main(int argc, char *argv[])
{
struct addrinfo *res, *ad, *newres;
struct sockaddr_in *sin, adsin;
struct sockaddr_in6 *sin6, adsin6;
char hostn[2 * NI_MAXHOST + 2], *cp;
struct pnfsdsfile dsfile[NFSDEV_MAXMIRRORS];
int ch, dosetxattr, i, mirrorcnt, mirrorit, quiet, zerods, zerofh;
in_port_t tport;
ssize_t xattrsize, xattrsize2;
zerods = 0;
zerofh = 0;
mirrorit = 0;
quiet = 0;
dosetxattr = 0;
res = NULL;
newres = NULL;
cp = NULL;
while ((ch = getopt_long(argc, argv, "c:m:qr:s:z", longopts, NULL)) !=
-1) {
switch (ch) {
case 'c':
/* Replace the first DS server with the second one. */
if (zerofh != 0 || zerods != 0 || mirrorit != 0 ||
newres != NULL || res != NULL)
errx(1, "-c, -m, -r, -s and -z are mutually "
"exclusive and only can be used once");
strlcpy(hostn, optarg, 2 * NI_MAXHOST + 2);
cp = strchr(hostn, ',');
if (cp == NULL)
errx(1, "Bad -c argument %s", hostn);
*cp = '\0';
if (getaddrinfo(hostn, NULL, NULL, &res) != 0)
errx(1, "Can't get IP# for %s", hostn);
*cp++ = ',';
if (getaddrinfo(cp, NULL, NULL, &newres) != 0)
errx(1, "Can't get IP# for %s", cp);
break;
case 'm':
/* Add 0.0.0.0 entries up to mirror level. */
if (zerofh != 0 || zerods != 0 || mirrorit != 0 ||
newres != NULL || res != NULL)
errx(1, "-c, -m, -r, -s and -z are mutually "
"exclusive and only can be used once");
mirrorit = atoi(optarg);
if (mirrorit < 2 || mirrorit > NFSDEV_MAXMIRRORS)
errx(1, "-m %d out of range", mirrorit);
break;
case 'q':
quiet = 1;
break;
case 'r':
/* Reset the DS server in a mirror with 0.0.0.0. */
if (zerofh != 0 || zerods != 0 || mirrorit != 0 ||
newres != NULL || res != NULL)
errx(1, "-c, -m, -r, -s and -z are mutually "
"exclusive and only can be used once");
zerods = 1;
/* Translate the server name to an IP address. */
if (getaddrinfo(optarg, NULL, NULL, &res) != 0)
errx(1, "Can't get IP# for %s", optarg);
break;
case 's':
/* Translate the server name to an IP address. */
if (zerods != 0 || mirrorit != 0 || newres != NULL ||
res != NULL)
errx(1, "-c, -m and -r are mutually exclusive "
"from use with -s and -z");
if (getaddrinfo(optarg, NULL, NULL, &res) != 0)
errx(1, "Can't get IP# for %s", optarg);
break;
case 'z':
if (zerofh != 0 || zerods != 0 || mirrorit != 0 ||
newres != NULL)
errx(1, "-c, -m and -r are mutually exclusive "
"from use with -s and -z");
zerofh = 1;
break;
default:
usage();
}
}
argc -= optind;
if (argc != 1)
usage();
argv += optind;
/*
* The host address and directory where the data storage file is
* located is in the extended attribute "pnfsd.dsfile".
*/
xattrsize = extattr_get_file(*argv, EXTATTR_NAMESPACE_SYSTEM,
"pnfsd.dsfile", dsfile, sizeof(dsfile));
mirrorcnt = xattrsize / sizeof(struct pnfsdsfile);
xattrsize2 = mirrorcnt * sizeof(struct pnfsdsfile);
if (mirrorcnt < 1 || xattrsize != xattrsize2)
err(1, "Can't get extattr pnfsd.dsfile for %s", *argv);
if (quiet == 0)
printf("%s:\t", *argv);
for (i = 0; i < mirrorcnt; i++) {
if (i > 0 && quiet == 0)
printf("\t");
/* Do the zerofh option. You must be root. */
if (zerofh != 0) {
if (geteuid() != 0)
errx(1, "Must be root/su to zerofh");
/*
* Do it for the server specified by -s/--ds or all
* servers, if -s/--ds was not specified.
*/
sin = &dsfile[i].dsf_sin;
sin6 = &dsfile[i].dsf_sin6;
ad = res;
while (ad != NULL) {
if (ad->ai_addr->sa_family == AF_INET &&
sin->sin_family == AF_INET &&
ad->ai_addrlen >= sizeof(adsin)) {
memcpy(&adsin, ad->ai_addr,
sizeof(adsin));
if (sin->sin_addr.s_addr ==
adsin.sin_addr.s_addr)
break;
}
if (ad->ai_addr->sa_family == AF_INET6 &&
sin6->sin6_family == AF_INET6 &&
ad->ai_addrlen >= sizeof(adsin6)) {
memcpy(&adsin6, ad->ai_addr,
sizeof(adsin6));
if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
&adsin6.sin6_addr))
break;
}
ad = ad->ai_next;
}
if (res == NULL || ad != NULL) {
memset(&dsfile[i].dsf_fh, 0, sizeof(fhandle_t));
dosetxattr = 1;
}
}
/* Do the zerods option. You must be root. */
if (zerods != 0 && mirrorcnt > 1) {
if (geteuid() != 0)
errx(1, "Must be root/su to zerods");
/*
* Do it for the server specified.
*/
sin = &dsfile[i].dsf_sin;
sin6 = &dsfile[i].dsf_sin6;
ad = res;
while (ad != NULL) {
if (ad->ai_addr->sa_family == AF_INET &&
sin->sin_family == AF_INET &&
ad->ai_addrlen >= sizeof(adsin)) {
memcpy(&adsin, ad->ai_addr,
sizeof(adsin));
if (sin->sin_addr.s_addr ==
adsin.sin_addr.s_addr)
break;
}
if (ad->ai_addr->sa_family == AF_INET6 &&
sin6->sin6_family == AF_INET6 &&
ad->ai_addrlen >= sizeof(adsin6)) {
memcpy(&adsin6, ad->ai_addr,
sizeof(adsin6));
if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
&adsin6.sin6_addr))
break;
}
ad = ad->ai_next;
}
if (ad != NULL) {
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = 0;
sin->sin_addr.s_addr = 0;
dosetxattr = 1;
}
}
/* Do the -c option to replace the DS host address. */
if (newres != NULL) {
if (geteuid() != 0)
errx(1, "Must be root/su to replace the host"
" addr");
/*
* Check that the old host address matches.
*/
sin = &dsfile[i].dsf_sin;
sin6 = &dsfile[i].dsf_sin6;
ad = res;
while (ad != NULL) {
if (ad->ai_addr->sa_family == AF_INET &&
sin->sin_family == AF_INET &&
ad->ai_addrlen >= sizeof(adsin)) {
memcpy(&adsin, ad->ai_addr,
sizeof(adsin));
if (sin->sin_addr.s_addr ==
adsin.sin_addr.s_addr)
break;
}
if (ad->ai_addr->sa_family == AF_INET6 &&
sin6->sin6_family == AF_INET6 &&
ad->ai_addrlen >= sizeof(adsin6)) {
memcpy(&adsin6, ad->ai_addr,
sizeof(adsin6));
if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
&adsin6.sin6_addr))
break;
}
ad = ad->ai_next;
}
if (ad != NULL) {
if (sin->sin_family == AF_INET)
tport = sin->sin_port;
else
tport = sin6->sin6_port;
/*
* We have a match, so replace it with the first
* AF_INET or AF_INET6 address in the newres
* list.
*/
while (newres->ai_addr->sa_family != AF_INET &&
newres->ai_addr->sa_family != AF_INET6) {
newres = newres->ai_next;
if (newres == NULL)
errx(1, "Hostname %s has no"
" IP#", cp);
}
if (newres->ai_addr->sa_family == AF_INET) {
memcpy(sin, newres->ai_addr,
sizeof(*sin));
sin->sin_port = tport;
} else if (newres->ai_addr->sa_family ==
AF_INET6) {
memcpy(sin6, newres->ai_addr,
sizeof(*sin6));
sin6->sin6_port = tport;
}
dosetxattr = 1;
}
}
if (quiet == 0) {
/* Translate the IP address to a hostname. */
if (getnameinfo((struct sockaddr *)&dsfile[i].dsf_sin,
dsfile[i].dsf_sin.sin_len, hostn, sizeof(hostn),
NULL, 0, 0) < 0)
err(1, "Can't get hostname");
printf("%s\tds%d/%s", hostn, dsfile[i].dsf_dir,
dsfile[i].dsf_filename);
}
}
/* Add entrie(s) with IP address set to 0.0.0.0, as required. */
for (i = mirrorcnt; i < mirrorit; i++) {
dsfile[i] = dsfile[0];
dsfile[i].dsf_sin.sin_family = AF_INET;
dsfile[i].dsf_sin.sin_len = sizeof(struct sockaddr_in);
dsfile[i].dsf_sin.sin_addr.s_addr = 0;
dsfile[i].dsf_sin.sin_port = 0;
if (quiet == 0) {
/* Print out the 0.0.0.0 entry. */
printf("\t0.0.0.0\tds%d/%s", dsfile[i].dsf_dir,
dsfile[i].dsf_filename);
}
}
if (mirrorit > mirrorcnt) {
xattrsize = mirrorit * sizeof(struct pnfsdsfile);
dosetxattr = 1;
}
if (quiet == 0)
printf("\n");
if (dosetxattr != 0 && extattr_set_file(*argv, EXTATTR_NAMESPACE_SYSTEM,
"pnfsd.dsfile", dsfile, xattrsize) != xattrsize)
err(1, "Can't set pnfsd.dsfile");
}
static void
usage(void)
{
fprintf(stderr, "pnfsdsfile [-q/--quiet] [-z/--zerofh] "
"[-c/--changeds <old dshostname> <new dshostname>] "
"[-r/--zerods <dshostname>] "
"[-s/--ds <dshostname>] "
"<filename>\n");
exit(1);
}
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