/*- * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void usage(void) __dead2; static struct option longopts[] = { { "migrate", required_argument, NULL, 'm' }, { "mirror", required_argument, NULL, 'r' }, { NULL, 0, NULL, 0 } }; /* * This program creates a copy of the file's (first argument) data on the * new/recovering DS mirror. If the file is already on the new/recovering * DS, it will simply exit(0). */ int main(int argc, char *argv[]) { struct nfsd_pnfsd_args pnfsdarg; struct pnfsdsfile dsfile[NFSDEV_MAXMIRRORS]; struct stat sb; struct statfs sf; struct addrinfo hints, *res, *nres; struct sockaddr_in sin; struct sockaddr_in6 sin6; ssize_t xattrsize, xattrsize2; size_t mirlen; int ch, fnd, fndzero, i, migrateit, mirrorcnt, mirrorit, ret; int mirrorlevel; char host[MNAMELEN + NI_MAXHOST + 2], *cp; if (geteuid() != 0) errx(1, "Must be run as root/su"); mirrorit = migrateit = 0; pnfsdarg.dspath = pnfsdarg.curdspath = NULL; while ((ch = getopt_long(argc, argv, "m:r:", longopts, NULL)) != -1) { switch (ch) { case 'm': /* Migrate the file from the second DS to the first. */ if (mirrorit != 0) errx(1, "-r and -m are mutually exclusive"); migrateit = 1; pnfsdarg.curdspath = optarg; break; case 'r': /* Mirror the file on the specified DS. */ if (migrateit != 0) errx(1, "-r and -m are mutually exclusive"); mirrorit = 1; pnfsdarg.dspath = optarg; break; default: usage(); } } argc -= optind; argv += optind; if (migrateit != 0) { if (argc != 2) usage(); pnfsdarg.dspath = *argv++; } else if (argc != 1) usage(); /* Get the pNFS service's mirror level. */ mirlen = sizeof(mirrorlevel); ret = sysctlbyname("vfs.nfs.pnfsmirror", &mirrorlevel, &mirlen, NULL, 0); if (ret < 0) errx(1, "Can't get vfs.nfs.pnfsmirror"); if (pnfsdarg.dspath != NULL && pnfsdarg.curdspath != NULL && strcmp(pnfsdarg.dspath, pnfsdarg.curdspath) == 0) errx(1, "Can't migrate to same server"); /* * 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) errx(1, "Can't get extattr pnfsd.dsfile for %s", *argv); /* See if there is a 0.0.0.0 entry. */ fndzero = 0; for (i = 0; i < mirrorcnt; i++) { if (dsfile[i].dsf_sin.sin_family == AF_INET && dsfile[i].dsf_sin.sin_addr.s_addr == 0) fndzero = 1; } /* If already mirrored for default case, just exit(0); */ if (mirrorit == 0 && migrateit == 0 && (mirrorlevel < 2 || (fndzero == 0 && mirrorcnt >= mirrorlevel) || (fndzero != 0 && mirrorcnt > mirrorlevel))) exit(0); /* For the "-r" case, there must be a 0.0.0.0 entry. */ if (mirrorit != 0 && (fndzero == 0 || mirrorlevel < 2 || mirrorcnt < 2 || mirrorcnt > mirrorlevel)) exit(0); /* For pnfsdarg.dspath set, if it is already in list, just exit(0); */ if (pnfsdarg.dspath != NULL) { /* Check the dspath to see that it's an NFS mount. */ if (stat(pnfsdarg.dspath, &sb) < 0) errx(1, "Can't stat %s", pnfsdarg.dspath); if (!S_ISDIR(sb.st_mode)) errx(1, "%s is not a directory", pnfsdarg.dspath); if (statfs(pnfsdarg.dspath, &sf) < 0) errx(1, "Can't fsstat %s", pnfsdarg.dspath); if (strcmp(sf.f_fstypename, "nfs") != 0) errx(1, "%s is not an NFS mount", pnfsdarg.dspath); if (strcmp(sf.f_mntonname, pnfsdarg.dspath) != 0) errx(1, "%s is not the mounted-on dir for the new DS", pnfsdarg.dspath); /* * Check the IP address of the NFS server against the entry(ies) * in the extended attribute. */ strlcpy(host, sf.f_mntfromname, sizeof(host)); cp = strchr(host, ':'); if (cp == NULL) errx(1, "No : in mount %s", host); *cp = '\0'; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; if (getaddrinfo(host, NULL, &hints, &res) != 0) errx(1, "Can't get address for %s", host); for (i = 0; i < mirrorcnt; i++) { nres = res; while (nres != NULL) { if (dsfile[i].dsf_sin.sin_family == nres->ai_family) { /* * If there is already an entry for this * DS, just exit(0), since copying isn't * required. */ if (nres->ai_family == AF_INET && nres->ai_addrlen >= sizeof(sin)) { memcpy(&sin, nres->ai_addr, sizeof(sin)); if (sin.sin_addr.s_addr == dsfile[i].dsf_sin.sin_addr.s_addr) exit(0); } else if (nres->ai_family == AF_INET6 && nres->ai_addrlen >= sizeof(sin6)) { memcpy(&sin6, nres->ai_addr, sizeof(sin6)); if (IN6_ARE_ADDR_EQUAL(&sin6.sin6_addr, &dsfile[i].dsf_sin6.sin6_addr)) exit(0); } } nres = nres->ai_next; } } freeaddrinfo(res); } /* For "-m", the pnfsdarg.curdspath must be in the list. */ if (pnfsdarg.curdspath != NULL) { /* Check pnfsdarg.curdspath to see that it's an NFS mount. */ if (stat(pnfsdarg.curdspath, &sb) < 0) errx(1, "Can't stat %s", pnfsdarg.curdspath); if (!S_ISDIR(sb.st_mode)) errx(1, "%s is not a directory", pnfsdarg.curdspath); if (statfs(pnfsdarg.curdspath, &sf) < 0) errx(1, "Can't fsstat %s", pnfsdarg.curdspath); if (strcmp(sf.f_fstypename, "nfs") != 0) errx(1, "%s is not an NFS mount", pnfsdarg.curdspath); if (strcmp(sf.f_mntonname, pnfsdarg.curdspath) != 0) errx(1, "%s is not the mounted-on dir of the cur DS", pnfsdarg.curdspath); /* * Check the IP address of the NFS server against the entry(ies) * in the extended attribute. */ strlcpy(host, sf.f_mntfromname, sizeof(host)); cp = strchr(host, ':'); if (cp == NULL) errx(1, "No : in mount %s", host); *cp = '\0'; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; if (getaddrinfo(host, NULL, &hints, &res) != 0) errx(1, "Can't get address for %s", host); fnd = 0; for (i = 0; i < mirrorcnt && fnd == 0; i++) { nres = res; while (nres != NULL) { if (dsfile[i].dsf_sin.sin_family == nres->ai_family) { /* * Note if the entry is found. */ if (nres->ai_family == AF_INET && nres->ai_addrlen >= sizeof(sin)) { memcpy(&sin, nres->ai_addr, sizeof(sin)); if (sin.sin_addr.s_addr == dsfile[i].dsf_sin.sin_addr.s_addr) { fnd = 1; break; } } else if (nres->ai_family == AF_INET6 && nres->ai_addrlen >= sizeof(sin6)) { memcpy(&sin6, nres->ai_addr, sizeof(sin6)); if (IN6_ARE_ADDR_EQUAL(&sin6.sin6_addr, &dsfile[i].dsf_sin6.sin6_addr)) { fnd = 1; break; } } } nres = nres->ai_next; } } freeaddrinfo(res); /* * If not found just exit(0), since it is not on the * source DS. */ if (fnd == 0) exit(0); } /* Do the copy via the nfssvc() syscall. */ pnfsdarg.op = PNFSDOP_COPYMR; pnfsdarg.mdspath = *argv; ret = nfssvc(NFSSVC_PNFSDS, &pnfsdarg); if (ret < 0 && errno != EEXIST) err(1, "Copymr failed for file %s", *argv); exit(0); } static void usage(void) { fprintf(stderr, "pnfsdscopymr [-r recovered-DS-mounted-on-path] " "[-m soure-DS-mounted-on-path destination-DS-mounted-on-path] " "mds-filename"); exit(1); }