| /* $Header: /cvsroot/watchdog/watchdog/src/nfsmount.c,v 1.2 2006/07/31 09:39:23 meskes Exp $ */ |
| |
| /* |
| * 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. |
| * |
| * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>: |
| * Omit the call to connect() for Linux version 1.3.11 or later. |
| * |
| * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com> |
| * Implemented the "bg", "fg" and "retry" mount options for NFS. |
| * |
| * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> |
| * - added Native Language Support |
| * |
| * Modified by Olaf Kirch and Trond Myklebust for new NFS code, |
| * plus NFSv3 stuff. |
| */ |
| |
| /* |
| * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp |
| */ |
| |
| #include "config.h" |
| |
| #if HAVE_NFS |
| |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <netdb.h> |
| #include <rpc/rpc.h> |
| #include <rpc/pmap_prot.h> |
| #include <rpc/pmap_clnt.h> |
| #include <sys/socket.h> |
| #include <sys/time.h> |
| #include <sys/utsname.h> |
| #include <sys/stat.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <time.h> |
| |
| #include "sundries.h" |
| #include "nfsmount.h" |
| |
| #include <linux/nfs.h> |
| #include "mount_constants.h" |
| #include "nfs_mount4.h" |
| |
| #define HAVE_inet_aton |
| |
| #ifndef NFS_PORT |
| #define NFS_PORT 2049 |
| #endif |
| #ifndef NFS_FHSIZE |
| #define NFS_FHSIZE 32 |
| #endif |
| |
| static char *nfs_strerror(int stat); |
| |
| #define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r)) |
| |
| #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) |
| |
| static int |
| linux_version_code(void) { |
| struct utsname my_utsname; |
| int p, q, r; |
| |
| if (uname(&my_utsname) == 0) { |
| p = atoi(strtok(my_utsname.release, ".")); |
| q = atoi(strtok(NULL, ".")); |
| r = atoi(strtok(NULL, ".")); |
| return MAKE_VERSION(p,q,r); |
| } |
| return 0; |
| } |
| |
| /* |
| * nfs_mount_version according to the sources seen at compile time. |
| */ |
| int nfs_mount_version = NFS_MOUNT_VERSION; |
| |
| /* |
| * Unfortunately, the kernel prints annoying console messages |
| * in case of an unexpected nfs mount version (instead of |
| * just returning some error). Therefore we'll have to try |
| * and figure out what version the kernel expects. |
| * |
| * Variables: |
| * NFS_MOUNT_VERSION: these nfsmount sources at compile time |
| * nfs_mount_version: version this source and running kernel can handle |
| */ |
| static void |
| find_kernel_nfs_mount_version(void) { |
| static int kernel_version = 0; |
| |
| if (kernel_version) |
| return; |
| |
| kernel_version = linux_version_code(); |
| |
| if (kernel_version) { |
| if (kernel_version < MAKE_VERSION(2,1,32)) |
| nfs_mount_version = 1; |
| else if (kernel_version < MAKE_VERSION(2,2,18)) |
| nfs_mount_version = 3; |
| else if (kernel_version < MAKE_VERSION(2,3,0)) |
| nfs_mount_version = 4; /* since 2.2.18pre9 */ |
| else if (kernel_version < MAKE_VERSION(2,3,99)) |
| nfs_mount_version = 3; |
| else |
| nfs_mount_version = 4; /* since 2.3.99pre4 */ |
| } |
| if (nfs_mount_version > NFS_MOUNT_VERSION) |
| nfs_mount_version = NFS_MOUNT_VERSION; |
| } |
| |
| static struct pmap * |
| get_mountport(struct sockaddr_in *server_addr, |
| long unsigned prog, |
| long unsigned version, |
| long unsigned proto, |
| long unsigned port) |
| { |
| struct pmaplist *pmap; |
| static struct pmap p = {0, 0, 0, 0}; |
| |
| server_addr->sin_port = PMAPPORT; |
| pmap = pmap_getmaps(server_addr); |
| |
| if (version > MAX_NFSPROT) |
| version = MAX_NFSPROT; |
| if (!prog) |
| prog = MOUNTPROG; |
| p.pm_prog = prog; |
| p.pm_vers = version; |
| p.pm_prot = proto; |
| p.pm_port = port; |
| |
| while (pmap) { |
| if (pmap->pml_map.pm_prog != prog) |
| goto next; |
| if (!version && p.pm_vers > pmap->pml_map.pm_vers) |
| goto next; |
| if (version > 2 && pmap->pml_map.pm_vers != version) |
| goto next; |
| if (version && version <= 2 && pmap->pml_map.pm_vers > 2) |
| goto next; |
| if (pmap->pml_map.pm_vers > MAX_NFSPROT || |
| (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) || |
| (port && pmap->pml_map.pm_port != port)) |
| goto next; |
| memcpy(&p, &pmap->pml_map, sizeof(p)); |
| next: |
| pmap = pmap->pml_next; |
| } |
| if (!p.pm_vers) |
| p.pm_vers = MOUNTVERS; |
| if (!p.pm_port) |
| p.pm_port = MOUNTPORT; |
| if (!p.pm_prot) |
| p.pm_prot = IPPROTO_TCP; |
| return &p; |
| } |
| |
| int nfsmount(const char *spec, const char *node, int *flags, |
| char **extra_opts, char **mount_opts, int running_bg) |
| { |
| static char *prev_bg_host; |
| char hostdir[1024]; |
| CLIENT *mclient; |
| char *hostname; |
| char *dirname; |
| char *old_opts; |
| char *mounthost=NULL; |
| char new_opts[1024]; |
| 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; |
| struct pmap* pm_mnt; |
| int msock, fsock; |
| struct timeval retry_timeout; |
| union { |
| struct fhstatus nfsv2; |
| struct mountres3 nfsv3; |
| } status; |
| struct stat statbuf; |
| char *s; |
| int port; |
| int mountport; |
| int proto; |
| int bg; |
| int soft; |
| int intr; |
| int posix; |
| int nocto; |
| int noac; |
| int nolock; |
| int broken_suid; |
| int retry; |
| int tcp; |
| int mountprog; |
| int mountvers; |
| int nfsprog; |
| int nfsvers; |
| int retval; |
| time_t t; |
| time_t prevt; |
| time_t timeout; |
| |
| find_kernel_nfs_mount_version(); |
| |
| retval = EX_FAIL; |
| msock = fsock = -1; |
| mclient = NULL; |
| if (strlen(spec) >= sizeof(hostdir)) { |
| fprintf(stderr, "mount: " |
| "excessively long host:dir argument\n"); |
| goto fail; |
| } |
| strcpy(hostdir, spec); |
| if ((s = strchr(hostdir, ':'))) { |
| hostname = hostdir; |
| dirname = s + 1; |
| *s = '\0'; |
| /* Ignore all but first hostname in replicated mounts |
| until they can be fully supported. (mack@sgi.com) */ |
| if ((s = strchr(hostdir, ','))) { |
| *s = '\0'; |
| fprintf(stderr, "mount: warning: " |
| "multiple hostnames not supported\n"); |
| } |
| } else { |
| fprintf(stderr, "mount: " |
| "directory to mount not in host:dir format\n"); |
| goto fail; |
| } |
| |
| server_addr.sin_family = AF_INET; |
| #ifdef HAVE_inet_aton |
| if (!inet_aton(hostname, &server_addr.sin_addr)) |
| #endif |
| { |
| if ((hp = gethostbyname(hostname)) == NULL) { |
| fprintf(stderr, "mount: can't get address for %s\n", |
| hostname); |
| goto fail; |
| } else { |
| if (hp->h_length > sizeof(struct in_addr)) { |
| fprintf(stderr, |
| "mount: got bad hp->h_length\n"); |
| hp->h_length = sizeof(struct in_addr); |
| } |
| 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 */ |
| |
| s = inet_ntoa(server_addr.sin_addr); |
| old_opts = *extra_opts; |
| if (!old_opts) |
| old_opts = ""; |
| if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) { |
| fprintf(stderr, "mount: " |
| "excessively long option argument\n"); |
| goto fail; |
| } |
| sprintf(new_opts, "%s%saddr=%s", |
| old_opts, *old_opts ? "," : "", s); |
| *extra_opts = xstrdup(new_opts); |
| |
| /* Set default options. |
| * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to |
| * let the kernel decide. |
| * timeo is filled in after we know whether it'll be TCP or UDP. */ |
| memset(&data, 0, sizeof(data)); |
| 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; |
| nolock = 0; |
| broken_suid = 0; |
| noac = 0; |
| retry = 10000; /* 10000 minutes ~ 1 week */ |
| tcp = 0; |
| |
| mountprog = MOUNTPROG; |
| mountvers = 0; |
| port = 0; |
| mountport = 0; |
| nfsprog = NFS_PROGRAM; |
| nfsvers = 0; |
| |
| /* 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=xstrndup(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") || |
| !strcmp(opt, "vers")) |
| nfsvers = val; |
| else if (!strcmp(opt, "proto")) { |
| if (!strncmp(opteq+1, "tcp", 3)) |
| tcp = 1; |
| else if (!strncmp(opteq+1, "udp", 3)) |
| tcp = 0; |
| else |
| printf("Warning: Unrecognized proto= option.\n"); |
| } else if (!strcmp(opt, "namlen")) { |
| #if NFS_MOUNT_VERSION >= 2 |
| if (nfs_mount_version >= 2) |
| data.namlen = val; |
| else |
| #endif |
| printf("Warning: Option namlen is not supported.\n"); |
| } else if (!strcmp(opt, "addr")) |
| /* ignore */; |
| else { |
| printf("unknown nfs mount parameter: " |
| "%s=%d\n", 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 if (!strcmp(opt, "lock")) { |
| if (nfs_mount_version >= 3) |
| nolock = !val; |
| else |
| printf("Warning: option nolock is not supported.\n"); |
| } else if (!strcmp(opt, "broken_suid")) { |
| broken_suid = val; |
| } else { |
| if (!sloppy) { |
| printf("unknown nfs mount option: " |
| "%s%s\n", val ? "" : "no", opt); |
| goto fail; |
| } |
| } |
| } |
| } |
| proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; |
| |
| 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 |
| if (nfs_mount_version >= 2) |
| data.flags |= (tcp ? NFS_MOUNT_TCP : 0); |
| #endif |
| #if NFS_MOUNT_VERSION >= 3 |
| if (nfs_mount_version >= 3) |
| data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); |
| #endif |
| #if NFS_MOUNT_VERSION >= 4 |
| if (nfs_mount_version >= 4) |
| data.flags |= (broken_suid ? NFS_MOUNT_BROKEN_SUID : 0); |
| #endif |
| if (nfsvers > MAX_NFSPROT) { |
| fprintf(stderr, "NFSv%d not supported!\n", nfsvers); |
| return 0; |
| } |
| if (mountvers > MAX_NFSPROT) { |
| fprintf(stderr, "NFSv%d not supported!\n", nfsvers); |
| return 0; |
| } |
| if (nfsvers && !mountvers) |
| mountvers = (nfsvers < 3) ? 1 : nfsvers; |
| if (nfsvers && nfsvers < mountvers) { |
| mountvers = nfsvers; |
| } |
| |
| /* Adjust options if none specified */ |
| if (!data.timeo) |
| data.timeo = tcp ? 70 : 7; |
| |
| #ifdef NFS_MOUNT_DEBUG |
| printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n", |
| data.rsize, data.wsize, data.timeo, data.retrans); |
| printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n", |
| data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); |
| printf("port = %d, bg = %d, retry = %d, flags = %.8x\n", |
| port, bg, retry, data.flags); |
| printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n", |
| mountprog, mountvers, nfsprog, nfsvers); |
| printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n", |
| (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 |
| printf("tcp = %d\n", |
| (data.flags & NFS_MOUNT_TCP) != 0); |
| #endif |
| #endif |
| |
| data.version = nfs_mount_version; |
| *mount_opts = (char *) &data; |
| |
| if (*flags & MS_REMOUNT) |
| return 0; |
| |
| /* |
| * If the previous mount operation on the same host was |
| * backgrounded, and the "bg" for this mount is also set, |
| * give up immediately, to avoid the initial timeout. |
| */ |
| if (bg && !running_bg && |
| prev_bg_host && strcmp(hostname, prev_bg_host) == 0) { |
| if (retry > 0) |
| retval = EX_BG; |
| return retval; |
| } |
| |
| /* 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) { |
| fprintf(stderr, "mount: can't get address for %s\n", |
| hostname); |
| goto fail; |
| } else { |
| if (hp->h_length > sizeof(struct in_addr)) { |
| fprintf(stderr, |
| "mount: got bad hp->h_length?\n"); |
| hp->h_length = sizeof(struct in_addr); |
| } |
| mount_server_addr.sin_family = AF_INET; |
| memcpy(&mount_server_addr.sin_addr, |
| hp->h_addr, hp->h_length); |
| } |
| } |
| } |
| |
| /* |
| * The following loop implements the mount retries. On the first |
| * call, "running_bg" is 0. When the mount times out, and the |
| * "bg" option is set, the exit status EX_BG will be returned. |
| * For a backgrounded mount, there will be a second call by the |
| * child process with "running_bg" set to 1. |
| * |
| * The case where the mount point is not present and the "bg" |
| * option is set, is treated as a timeout. This is done to |
| * support nested mounts. |
| * |
| * The "retry" count specified by the user is the number of |
| * minutes to retry before giving up. |
| * |
| * Only the first error message will be displayed. |
| */ |
| retry_timeout.tv_sec = 3; |
| retry_timeout.tv_usec = 0; |
| total_timeout.tv_sec = 20; |
| total_timeout.tv_usec = 0; |
| timeout = time(NULL) + 60 * retry; |
| prevt = 0; |
| t = 30; |
| val = 1; |
| |
| for (;;) { |
| if (bg && stat(node, &statbuf) == -1) { |
| /* no mount point yet - sleep */ |
| if (running_bg) { |
| sleep(val); /* 1, 2, 4, 8, 16, 30, ... */ |
| val *= 2; |
| if (val > 30) |
| val = 30; |
| } |
| } else { |
| /* be careful not to use too many CPU cycles */ |
| if (t - prevt < 30) |
| sleep(30); |
| |
| pm_mnt = get_mountport(&mount_server_addr, |
| mountprog, |
| mountvers, |
| proto, |
| mountport); |
| |
| /* contact the mount daemon via TCP */ |
| mount_server_addr.sin_port = htons(pm_mnt->pm_port); |
| msock = RPC_ANYSOCK; |
| |
| switch (pm_mnt->pm_prot) { |
| case IPPROTO_UDP: |
| mclient = clntudp_create(&mount_server_addr, |
| pm_mnt->pm_prog, |
| pm_mnt->pm_vers, |
| retry_timeout, |
| &msock); |
| if (mclient) |
| break; |
| mount_server_addr.sin_port = htons(pm_mnt->pm_port); |
| msock = RPC_ANYSOCK; |
| case IPPROTO_TCP: |
| mclient = clnttcp_create(&mount_server_addr, |
| pm_mnt->pm_prog, |
| pm_mnt->pm_vers, |
| &msock, 0, 0); |
| break; |
| default: |
| mclient = 0; |
| } |
| |
| if (mclient) { |
| /* try to mount hostname:dirname */ |
| mclient->cl_auth = authunix_create_default(); |
| |
| /* make pointers in xdr_mountres3 NULL so |
| * that xdr_array allocates memory for us |
| */ |
| memset(&status, 0, sizeof(status)); |
| |
| if (pm_mnt->pm_vers == 3) |
| clnt_stat = clnt_call(mclient, |
| MOUNTPROC3_MNT, |
| (xdrproc_t) xdr_dirpath, |
| (caddr_t) &dirname, |
| (xdrproc_t) xdr_mountres3, |
| (caddr_t) &status, |
| total_timeout); |
| else |
| clnt_stat = clnt_call(mclient, |
| MOUNTPROC_MNT, |
| (xdrproc_t) xdr_dirpath, |
| (caddr_t) &dirname, |
| (xdrproc_t) xdr_fhstatus, |
| (caddr_t) &status, |
| total_timeout); |
| |
| if (clnt_stat == RPC_SUCCESS) |
| break; /* we're done */ |
| #if 0 |
| /* errno? who sets errno? */ |
| /* this fragment breaks bg mounting */ |
| if (errno != ECONNREFUSED) { |
| clnt_perror(mclient, "mount"); |
| goto fail; /* don't retry */ |
| } |
| #endif |
| if (!running_bg && prevt == 0) |
| clnt_perror(mclient, "mount"); |
| auth_destroy(mclient->cl_auth); |
| clnt_destroy(mclient); |
| mclient = 0; |
| close(msock); |
| } else { |
| if (!running_bg && prevt == 0) |
| clnt_pcreateerror("mount"); |
| } |
| prevt = t; |
| } |
| |
| if (!bg) |
| goto fail; |
| if (!running_bg) { |
| prev_bg_host = xstrdup(hostname); |
| if (retry > 0) |
| retval = EX_BG; |
| goto fail; |
| } |
| t = time(NULL); |
| if (t >= timeout) |
| goto fail; |
| } |
| nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; |
| |
| if (nfsvers == 2) { |
| if (status.nfsv2.fhs_status != 0) { |
| fprintf(stderr, |
| "mount: %s:%s failed, reason given by server: %s\n", |
| hostname, dirname, |
| nfs_strerror(status.nfsv2.fhs_status)); |
| goto fail; |
| } |
| memcpy(data.root.data, |
| (char *) status.nfsv2.fhstatus_u.fhs_fhandle, |
| NFS_FHSIZE); |
| #if NFS_MOUNT_VERSION >= 4 |
| data.root.size = NFS_FHSIZE; |
| memcpy(data.old_root.data, |
| (char *) status.nfsv2.fhstatus_u.fhs_fhandle, |
| NFS_FHSIZE); |
| #endif |
| } else { |
| #if NFS_MOUNT_VERSION >= 4 |
| fhandle3 *fhandle; |
| if (status.nfsv3.fhs_status != 0) { |
| fprintf(stderr, |
| "mount: %s:%s failed, reason given by server: %s\n", |
| hostname, dirname, |
| nfs_strerror(status.nfsv3.fhs_status)); |
| goto fail; |
| } |
| fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; |
| memset(data.old_root.data, 0, NFS_FHSIZE); |
| memset(&data.root, 0, sizeof(data.root)); |
| data.root.size = fhandle->fhandle3_len; |
| memcpy(data.root.data, |
| (char *) fhandle->fhandle3_val, |
| fhandle->fhandle3_len); |
| |
| data.flags |= NFS_MOUNT_VER3; |
| #endif |
| } |
| |
| /* create nfs socket for kernel */ |
| |
| if (tcp) { |
| if (nfs_mount_version < 3) { |
| printf("NFS over TCP is not supported.\n"); |
| goto fail; |
| } |
| fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| } 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 |
| printf("used portmapper to find NFS port\n"); |
| #endif |
| } |
| #ifdef NFS_MOUNT_DEBUG |
| printf("using port %d for nfs deamon\n", port); |
| #endif |
| server_addr.sin_port = htons(port); |
| /* |
| * connect() the socket for kernels 1.3.10 and below only, |
| * to avoid problems with multihomed hosts. |
| * --Swen |
| */ |
| if (linux_version_code() <= 66314 |
| && 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.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) { |
| if (mclient) { |
| auth_destroy(mclient->cl_auth); |
| clnt_destroy(mclient); |
| } |
| close(msock); |
| } |
| if (fsock != -1) |
| close(fsock); |
| return retval; |
| } |
| |
| /* |
| * We need to translate between nfs status return values and |
| * the local errno values which may not be the same. |
| * |
| * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno: |
| * "after #include <errno.h> the symbol errno is reserved for any use, |
| * it cannot even be used as a struct tag or field name". |
| */ |
| |
| #ifndef EDQUOT |
| #define EDQUOT ENOSPC |
| #endif |
| |
| static struct { |
| enum nfs_stat stat; |
| int errnum; |
| } 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 |
| /* Throw in some NFSv3 values for even more fun (HP returns these) */ |
| { 71, EREMOTE }, |
| |
| { -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].errnum); |
| } |
| sprintf(buf, "unknown nfs status return value: %d", stat); |
| return buf; |
| } |
| |
| #if 0 |
| int |
| my_getport(struct in_addr server, struct timeval *timeo, ...) |
| { |
| struct sockaddr_in sin; |
| struct pmap pmap; |
| CLIENT *clnt; |
| int sock = RPC_ANYSOCK, port; |
| |
| pmap.pm_prog = prog; |
| pmap.pm_vers = vers; |
| pmap.pm_prot = prot; |
| pmap.pm_port = 0; |
| sin.sin_family = AF_INET; |
| sin.sin_addr = server; |
| sin.sin_port = htons(111); |
| clnt = clntudp_create(&sin, 100000, 2, *timeo, &sock); |
| status = clnt_call(clnt, PMAP_GETPORT, |
| &pmap, (xdrproc_t) xdr_pmap, |
| &port, (xdrproc_t) xdr_uint); |
| if (status != SUCCESS) { |
| /* natter */ |
| port = 0; |
| } |
| |
| clnt_destroy(clnt); |
| close(sock); |
| return port; |
| } |
| #endif |
| |
| #endif |