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- /*
- * nfsmount.c -- Linux NFS mount
- * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
- * numbers to be specified on the command line.
- */
-
- /*
- * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
- */
-
- #include <stdio.h>
- #include <rpc/rpc.h>
- #include <rpc/pmap_prot.h>
- #include <rpc/pmap_clnt.h>
- #include <sys/socket.h>
- #include <sys/time.h>
- #include <string.h>
- #include <netdb.h>
- #include <arpa/inet.h>
- #include <errno.h>
- #include <string.h>
- #include <unistd.h>
-
- #include "log.h"
- #include "mount.h"
-
- #include <linux/fs.h>
- #include <linux/nfs.h>
- #include <linux/nfs_mount.h>
-
- #ifndef __alpha__
- static char *strndup (char *str, int n) {
- char *ret;
- ret = malloc (n+1);
- if (ret == NULL) {
- perror ("malloc");
- return (NULL);
- }
- strncpy (ret, str, n);
- return (ret);
- }
- #endif
-
- static char *nfs_strerror(int stat);
-
- int nfsmount(const char *spec, const char *node, int *flags,
- char **extra_opts, char **mount_opts)
- {
- char hostdir[1024];
- CLIENT *mclient;
- char *hostname;
- char *dirname;
- char *old_opts;
- char *mounthost=NULL;
- char new_opts[1024];
- fhandle root_fhandle;
- struct timeval total_timeout;
- enum clnt_stat clnt_stat;
- static struct nfs_mount_data data;
- char *opt, *opteq;
- int val;
- struct hostent *hp;
- struct sockaddr_in server_addr;
- struct sockaddr_in mount_server_addr;
- int msock, fsock;
- struct timeval pertry_timeout;
- struct fhstatus status;
- char *s;
- int port;
- int mountport;
- int bg;
- int soft;
- int intr;
- int posix;
- int nocto;
- int noac;
- int retry;
- int tcp;
- int mountprog;
- int mountvers;
- int nfsprog;
- int nfsvers;
-
- msock = fsock = -1;
- mclient = NULL;
- strcpy(hostdir, spec);
- if ((s = (strchr(hostdir, ':')))) {
- hostname = hostdir;
- dirname = s + 1;
- *s = '\0';
- }
- else {
- logMessage("mount: "
- "directory to mount not in host:dir format");
- goto fail;
- }
-
- if (hostname[0] >= '0' && hostname[0] <= '9') {
- server_addr.sin_family = AF_INET;
- server_addr.sin_addr.s_addr = inet_addr(hostname);
- }
- else if ((hp = gethostbyname(hostname)) == NULL) {
- logMessage("mount: can't get address for %s", hostname);
- goto fail;
- }
- else {
- server_addr.sin_family = AF_INET;
- memcpy(&server_addr.sin_addr, hp->h_addr, hp->h_length);
- }
-
- memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
-
- /* add IP address to mtab options for use when unmounting */
-
- old_opts = *extra_opts;
- if (!old_opts)
- old_opts = "";
- sprintf(new_opts, "%s%saddr=%s",
- old_opts, *old_opts ? "," : "",
- inet_ntoa(server_addr.sin_addr));
- *extra_opts = strdup(new_opts);
-
- /* set default options */
-
- data.rsize = 0; /* let kernel decide */
- data.wsize = 0; /* let kernel decide */
- data.timeo = 7;
- data.retrans = 3;
- data.acregmin = 3;
- data.acregmax = 60;
- data.acdirmin = 30;
- data.acdirmax = 60;
- #if NFS_MOUNT_VERSION >= 2
- data.namlen = NAME_MAX;
- #endif
-
- bg = 0;
- soft = 0;
- intr = 0;
- posix = 0;
- nocto = 0;
- noac = 0;
- retry = 10000;
- tcp = 0;
-
- mountprog = MOUNTPROG;
- mountvers = MOUNTVERS;
- port = 0;
- mountport = 0;
- nfsprog = NFS_PROGRAM;
- nfsvers = NFS_VERSION;
-
- /* parse options */
-
- for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
- if ((opteq = strchr(opt, '='))) {
- val = atoi(opteq + 1);
- *opteq = '\0';
- if (!strcmp(opt, "rsize"))
- data.rsize = val;
- else if (!strcmp(opt, "wsize"))
- data.wsize = val;
- else if (!strcmp(opt, "timeo"))
- data.timeo = val;
- else if (!strcmp(opt, "retrans"))
- data.retrans = val;
- else if (!strcmp(opt, "acregmin"))
- data.acregmin = val;
- else if (!strcmp(opt, "acregmax"))
- data.acregmax = val;
- else if (!strcmp(opt, "acdirmin"))
- data.acdirmin = val;
- else if (!strcmp(opt, "acdirmax"))
- data.acdirmax = val;
- else if (!strcmp(opt, "actimeo")) {
- data.acregmin = val;
- data.acregmax = val;
- data.acdirmin = val;
- data.acdirmax = val;
- }
- else if (!strcmp(opt, "retry"))
- retry = val;
- else if (!strcmp(opt, "port"))
- port = val;
- else if (!strcmp(opt, "mountport"))
- mountport = val;
- else if (!strcmp(opt, "mounthost"))
- mounthost=strndup(opteq+1,
- strcspn(opteq+1," \t\n\r,"));
- else if (!strcmp(opt, "mountprog"))
- mountprog = val;
- else if (!strcmp(opt, "mountvers"))
- mountvers = val;
- else if (!strcmp(opt, "nfsprog"))
- nfsprog = val;
- else if (!strcmp(opt, "nfsvers"))
- nfsvers = val;
- else if (!strcmp(opt, "namlen")) {
- #if NFS_MOUNT_VERSION >= 2
- data.namlen = val;
- #else
- logMessage("Warning: Option namlen is not supported.");
- #endif
- }
- else if (!strcmp(opt, "addr"))
- /* ignore */;
- else {
- logMessage("unknown nfs mount parameter: "
- "%s=%d", opt, val);
- goto fail;
- }
- }
- else {
- val = 1;
- if (!strncmp(opt, "no", 2)) {
- val = 0;
- opt += 2;
- }
- if (!strcmp(opt, "bg"))
- bg = val;
- else if (!strcmp(opt, "fg"))
- bg = !val;
- else if (!strcmp(opt, "soft"))
- soft = val;
- else if (!strcmp(opt, "hard"))
- soft = !val;
- else if (!strcmp(opt, "intr"))
- intr = val;
- else if (!strcmp(opt, "posix"))
- posix = val;
- else if (!strcmp(opt, "cto"))
- nocto = !val;
- else if (!strcmp(opt, "ac"))
- noac = !val;
- else if (!strcmp(opt, "tcp"))
- tcp = val;
- else if (!strcmp(opt, "udp"))
- tcp = !val;
- else {
- logMessage("unknown nfs mount option: "
- "%s%s", val ? "" : "no", opt);
- goto fail;
- }
- }
- }
- data.flags = (soft ? NFS_MOUNT_SOFT : 0)
- | (intr ? NFS_MOUNT_INTR : 0)
- | (posix ? NFS_MOUNT_POSIX : 0)
- | (nocto ? NFS_MOUNT_NOCTO : 0)
- | (noac ? NFS_MOUNT_NOAC : 0);
- #if NFS_MOUNT_VERSION >= 2
- data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
- #endif
-
- #ifdef NFS_MOUNT_DEBUG
- logMessage("rsize = %d, wsize = %d, timeo = %d, retrans = %d",
- data.rsize, data.wsize, data.timeo, data.retrans);
- logMessage("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)",
- data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
- logMessage("port = %d, bg = %d, retry = %d, flags = %.8x",
- port, bg, retry, data.flags);
- logMessage("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d",
- mountprog, mountvers, nfsprog, nfsvers);
- logMessage("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d",
- (data.flags & NFS_MOUNT_SOFT) != 0,
- (data.flags & NFS_MOUNT_INTR) != 0,
- (data.flags & NFS_MOUNT_POSIX) != 0,
- (data.flags & NFS_MOUNT_NOCTO) != 0,
- (data.flags & NFS_MOUNT_NOAC) != 0);
- #if NFS_MOUNT_VERSION >= 2
- logMessage("tcp = %d",
- (data.flags & NFS_MOUNT_TCP) != 0);
- #endif
- #if 0
- goto fail;
- #endif
- #endif
-
- data.version = NFS_MOUNT_VERSION;
- *mount_opts = (char *) &data;
-
- if (*flags & MS_REMOUNT)
- return 0;
-
- /* create mount deamon client */
- /* See if the nfs host = mount host. */
- if (mounthost) {
- if (mounthost[0] >= '0' && mounthost[0] <= '9') {
- mount_server_addr.sin_family = AF_INET;
- mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
- }
- else if ((hp = gethostbyname(mounthost)) == NULL) {
- logMessage("mount: can't get address for %s", hostname);
- goto fail;
- }
- else {
- mount_server_addr.sin_family = AF_INET;
- memcpy(&mount_server_addr.sin_addr, hp->h_addr, hp->h_length);
- }
- }
-
- mount_server_addr.sin_port = htons(mountport);
- msock = RPC_ANYSOCK;
- if ((mclient = clnttcp_create(&mount_server_addr,
- mountprog, mountvers, &msock, 0, 0)) == NULL) {
- mount_server_addr.sin_port = htons(mountport);
- msock = RPC_ANYSOCK;
- pertry_timeout.tv_sec = 3;
- pertry_timeout.tv_usec = 0;
- if ((mclient = clntudp_create(&mount_server_addr,
- mountprog, mountvers, pertry_timeout, &msock)) == NULL) {
- clnt_pcreateerror("mount clntudp_create");
- goto fail;
- }
- #ifdef NFS_MOUNT_DEBUG
- logMessage("using UDP for mount deamon");
- #endif
- }
- #ifdef NFS_MOUNT_DEBUG
- else
- logMessage("using TCP for mount deamon");
- #endif
- mclient->cl_auth = authunix_create_default();
- total_timeout.tv_sec = 20;
- total_timeout.tv_usec = 0;
-
- /* try to mount hostname:dirname */
-
- clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
- xdr_dirpath, &dirname,
- xdr_fhstatus, &status,
- total_timeout);
- if (clnt_stat != RPC_SUCCESS) {
- clnt_perror(mclient, "rpc mount");
- goto fail;
- }
- if (status.fhs_status != 0) {
- logMessage("mount: %s:%s failed, reason given by server: %s",
- hostname, dirname, nfs_strerror(status.fhs_status));
- goto fail;
- }
- memcpy((char *) &root_fhandle, (char *) status.fhstatus_u.fhs_fhandle,
- sizeof (root_fhandle));
-
- /* create nfs socket for kernel */
-
- if (tcp) {
- #if NFS_MOUNT_VERSION >= 2
- fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- #else
- logMessage("NFS over TCP is not supported.");
- goto fail;
- #endif
- }
- else
- fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if (fsock < 0) {
- perror("nfs socket");
- goto fail;
- }
- if (bindresvport(fsock, 0) < 0) {
- perror("nfs bindresvport");
- goto fail;
- }
- if (port == 0) {
- server_addr.sin_port = PMAPPORT;
- port = pmap_getport(&server_addr, nfsprog, nfsvers,
- tcp ? IPPROTO_TCP : IPPROTO_UDP);
- if (port == 0)
- port = NFS_PORT;
- #ifdef NFS_MOUNT_DEBUG
- else
- logMessage("used portmapper to find NFS port");
- #endif
- }
- #ifdef NFS_MOUNT_DEBUG
- logMessage("using port %d for nfs deamon", port);
- #endif
- server_addr.sin_port = htons(port);
- if (connect(fsock, (struct sockaddr *) &server_addr,
- sizeof (server_addr)) < 0) {
- perror("nfs connect");
- goto fail;
- }
-
- /* prepare data structure for kernel */
-
- data.fd = fsock;
- memcpy((char *) &data.root, (char *) &root_fhandle,
- sizeof (root_fhandle));
- memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
- strncpy(data.hostname, hostname, sizeof(data.hostname));
-
- /* clean up */
-
- auth_destroy(mclient->cl_auth);
- clnt_destroy(mclient);
- close(msock);
- return 0;
-
- /* abort */
-
- fail:
- if (msock != -1) {
- auth_destroy(mclient->cl_auth);
- clnt_destroy(mclient);
- close(msock);
- }
- if (fsock != -1)
- close(fsock);
- return 1;}
-
-
- /*
- * We need to translate between nfs status return values and
- * the local errno values which may not be the same.
- */
-
- #ifndef EDQUOT
- #define EDQUOT ENOSPC
- #endif
-
- static struct {
- enum nfs_stat stat;
- int errno;
- } nfs_errtbl[] = {
- { NFS_OK, 0 },
- { NFSERR_PERM, EPERM },
- { NFSERR_NOENT, ENOENT },
- { NFSERR_IO, EIO },
- { NFSERR_NXIO, ENXIO },
- { NFSERR_ACCES, EACCES },
- { NFSERR_EXIST, EEXIST },
- { NFSERR_NODEV, ENODEV },
- { NFSERR_NOTDIR, ENOTDIR },
- { NFSERR_ISDIR, EISDIR },
- #ifdef NFSERR_INVAL
- { NFSERR_INVAL, EINVAL }, /* that Sun forgot */
- #endif
- { NFSERR_FBIG, EFBIG },
- { NFSERR_NOSPC, ENOSPC },
- { NFSERR_ROFS, EROFS },
- { NFSERR_NAMETOOLONG, ENAMETOOLONG },
- { NFSERR_NOTEMPTY, ENOTEMPTY },
- { NFSERR_DQUOT, EDQUOT },
- { NFSERR_STALE, ESTALE },
- #ifdef EWFLUSH
- { NFSERR_WFLUSH, EWFLUSH },
- #endif
- { -1, EIO }
- };
-
- static char *nfs_strerror(int stat)
- {
- int i;
- static char buf[256];
-
- for (i = 0; nfs_errtbl[i].stat != -1; i++) {
- if (nfs_errtbl[i].stat == stat)
- return strerror(nfs_errtbl[i].errno);
- }
- sprintf(buf, "unknown nfs status return value: %d", stat);
- return buf;
- }
-
-