| /* vi: set sw=4 ts=4: */ |
| /* |
| * 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 <unistd.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <netdb.h> |
| #include <sys/socket.h> |
| #include <time.h> |
| #include <sys/utsname.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <stdlib.h> |
| #include "busybox.h" |
| #undef TRUE |
| #undef FALSE |
| #include <rpc/rpc.h> |
| #include <rpc/pmap_prot.h> |
| #include <rpc/pmap_clnt.h> |
| #include "nfsmount.h" |
| |
| |
| /* |
| * NFS stats. The good thing with these values is that NFSv3 errors are |
| * a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which |
| * no-one uses anyway), so we can happily mix code as long as we make sure |
| * no NFSv3 errors are returned to NFSv2 clients. |
| * Error codes that have a `--' in the v2 column are not part of the |
| * standard, but seem to be widely used nevertheless. |
| */ |
| enum nfs_stat { |
| NFS_OK = 0, /* v2 v3 */ |
| NFSERR_PERM = 1, /* v2 v3 */ |
| NFSERR_NOENT = 2, /* v2 v3 */ |
| NFSERR_IO = 5, /* v2 v3 */ |
| NFSERR_NXIO = 6, /* v2 v3 */ |
| NFSERR_EAGAIN = 11, /* v2 v3 */ |
| NFSERR_ACCES = 13, /* v2 v3 */ |
| NFSERR_EXIST = 17, /* v2 v3 */ |
| NFSERR_XDEV = 18, /* v3 */ |
| NFSERR_NODEV = 19, /* v2 v3 */ |
| NFSERR_NOTDIR = 20, /* v2 v3 */ |
| NFSERR_ISDIR = 21, /* v2 v3 */ |
| NFSERR_INVAL = 22, /* v2 v3 that Sun forgot */ |
| NFSERR_FBIG = 27, /* v2 v3 */ |
| NFSERR_NOSPC = 28, /* v2 v3 */ |
| NFSERR_ROFS = 30, /* v2 v3 */ |
| NFSERR_MLINK = 31, /* v3 */ |
| NFSERR_OPNOTSUPP = 45, /* v2 v3 */ |
| NFSERR_NAMETOOLONG = 63, /* v2 v3 */ |
| NFSERR_NOTEMPTY = 66, /* v2 v3 */ |
| NFSERR_DQUOT = 69, /* v2 v3 */ |
| NFSERR_STALE = 70, /* v2 v3 */ |
| NFSERR_REMOTE = 71, /* v2 v3 */ |
| NFSERR_WFLUSH = 99, /* v2 */ |
| NFSERR_BADHANDLE = 10001, /* v3 */ |
| NFSERR_NOT_SYNC = 10002, /* v3 */ |
| NFSERR_BAD_COOKIE = 10003, /* v3 */ |
| NFSERR_NOTSUPP = 10004, /* v3 */ |
| NFSERR_TOOSMALL = 10005, /* v3 */ |
| NFSERR_SERVERFAULT = 10006, /* v3 */ |
| NFSERR_BADTYPE = 10007, /* v3 */ |
| NFSERR_JUKEBOX = 10008 /* v3 */ |
| }; |
| |
| #define NFS_PROGRAM 100003 |
| |
| |
| |
| #ifndef NFS_FHSIZE |
| static const int NFS_FHSIZE = 32; |
| #endif |
| #ifndef NFS_PORT |
| static const int NFS_PORT = 2049; |
| #endif |
| |
| /* Disable the nls stuff */ |
| # undef bindtextdomain |
| # define bindtextdomain(Domain, Directory) /* empty */ |
| # undef textdomain |
| # define textdomain(Domain) /* empty */ |
| # define _(Text) (Text) |
| # define N_(Text) (Text) |
| |
| static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */ |
| static const int MS_RDONLY = 1; /* Mount read-only */ |
| static const int MS_NOSUID = 2; /* Ignore suid and sgid bits */ |
| static const int MS_NODEV = 4; /* Disallow access to device special files */ |
| static const int MS_NOEXEC = 8; /* Disallow program execution */ |
| static const int MS_SYNCHRONOUS = 16; /* Writes are synced at once */ |
| static const int MS_REMOUNT = 32; /* Alter flags of a mounted FS */ |
| static const int MS_MANDLOCK = 64; /* Allow mandatory locks on an FS */ |
| static const int S_QUOTA = 128; /* Quota initialized for file/directory/symlink */ |
| static const int S_APPEND = 256; /* Append-only file */ |
| static const int S_IMMUTABLE = 512; /* Immutable file */ |
| static const int MS_NOATIME = 1024; /* Do not update access times. */ |
| static const int MS_NODIRATIME = 2048; /* Do not update directory access times */ |
| |
| |
| /* |
| * We want to be able to compile mount on old kernels in such a way |
| * that the binary will work well on more recent kernels. |
| * Thus, if necessary we teach nfsmount.c the structure of new fields |
| * that will come later. |
| * |
| * Moreover, the new kernel includes conflict with glibc includes |
| * so it is easiest to ignore the kernel altogether (at compile time). |
| */ |
| |
| /* NOTE: Do not make this into a 'static const int' because the pre-processor |
| * needs to test this value in some #if statements. */ |
| #define NFS_MOUNT_VERSION 4 |
| |
| struct nfs2_fh { |
| char data[32]; |
| }; |
| struct nfs3_fh { |
| unsigned short size; |
| unsigned char data[64]; |
| }; |
| |
| struct nfs_mount_data { |
| int version; /* 1 */ |
| int fd; /* 1 */ |
| struct nfs2_fh old_root; /* 1 */ |
| int flags; /* 1 */ |
| int rsize; /* 1 */ |
| int wsize; /* 1 */ |
| int timeo; /* 1 */ |
| int retrans; /* 1 */ |
| int acregmin; /* 1 */ |
| int acregmax; /* 1 */ |
| int acdirmin; /* 1 */ |
| int acdirmax; /* 1 */ |
| struct sockaddr_in addr; /* 1 */ |
| char hostname[256]; /* 1 */ |
| int namlen; /* 2 */ |
| unsigned int bsize; /* 3 */ |
| struct nfs3_fh root; /* 4 */ |
| }; |
| |
| /* bits in the flags field */ |
| |
| static const int NFS_MOUNT_SOFT = 0x0001; /* 1 */ |
| static const int NFS_MOUNT_INTR = 0x0002; /* 1 */ |
| static const int NFS_MOUNT_SECURE = 0x0004; /* 1 */ |
| static const int NFS_MOUNT_POSIX = 0x0008; /* 1 */ |
| static const int NFS_MOUNT_NOCTO = 0x0010; /* 1 */ |
| static const int NFS_MOUNT_NOAC = 0x0020; /* 1 */ |
| static const int NFS_MOUNT_TCP = 0x0040; /* 2 */ |
| static const int NFS_MOUNT_VER3 = 0x0080; /* 3 */ |
| static const int NFS_MOUNT_KERBEROS = 0x0100; /* 3 */ |
| static const int NFS_MOUNT_NONLM = 0x0200; /* 3 */ |
| |
| |
| #define UTIL_LINUX_VERSION "2.10m" |
| #define util_linux_version "util-linux-2.10m" |
| |
| #define HAVE_inet_aton |
| #define HAVE_scsi_h |
| #define HAVE_blkpg_h |
| #define HAVE_kd_h |
| #define HAVE_termcap |
| #define HAVE_locale_h |
| #define HAVE_libintl_h |
| #define ENABLE_NLS |
| #define HAVE_langinfo_h |
| #define HAVE_progname |
| #define HAVE_openpty |
| #define HAVE_nanosleep |
| #define HAVE_personality |
| #define HAVE_tm_gmtoff |
| |
| static char *nfs_strerror(int status); |
| |
| #define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r)) |
| #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) |
| |
| static const int EX_FAIL = 32; /* mount failure */ |
| static const int EX_BG = 256; /* retry in background (internal only) */ |
| |
| |
| /* |
| * nfs_mount_version according to the sources seen at compile time. |
| */ |
| static int 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: |
| * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time |
| * 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; |
| |
| nfs_mount_version = NFS_MOUNT_VERSION; /* default */ |
| |
| kernel_version = get_kernel_revision(); |
| if (kernel_version) { |
| if (kernel_version < MAKE_VERSION(2,1,32)) |
| nfs_mount_version = 1; |
| else if (kernel_version < MAKE_VERSION(2,2,18) || |
| (kernel_version >= MAKE_VERSION(2,3,0) && |
| 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 *pathname; |
| 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 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)) { |
| bb_error_msg("excessively long host:dir argument"); |
| goto fail; |
| } |
| strcpy(hostdir, spec); |
| if ((s = strchr(hostdir, ':'))) { |
| hostname = hostdir; |
| pathname = 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'; |
| bb_error_msg("warning: multiple hostnames not supported"); |
| } |
| } else { |
| bb_error_msg("directory to mount not in host:dir format"); |
| 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) { |
| bb_herror_msg("%s", hostname); |
| goto fail; |
| } else { |
| if (hp->h_length > sizeof(struct in_addr)) { |
| bb_error_msg("got bad hp->h_length"); |
| 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)) { |
| bb_error_msg("excessively long option argument"); |
| goto fail; |
| } |
| sprintf(new_opts, "%s%saddr=%s", |
| old_opts, *old_opts ? "," : "", s); |
| *extra_opts = bb_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; |
| 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=bb_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 { |
| 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 (nfsvers > MAX_NFSPROT) { |
| bb_error_msg("NFSv%d not supported!", nfsvers); |
| return 0; |
| } |
| if (mountvers > MAX_NFSPROT) { |
| bb_error_msg("NFSv%d not supported!", 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) { |
| bb_herror_msg("%s", mounthost); |
| goto fail; |
| } else { |
| if (hp->h_length > sizeof(struct in_addr)) { |
| bb_error_msg("got bad hp->h_length?"); |
| 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) { |
| 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:pathname */ |
| 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) &pathname, |
| (xdrproc_t) xdr_mountres3, |
| (caddr_t) &status, |
| total_timeout); |
| else |
| clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, |
| (xdrproc_t) xdr_dirpath, |
| (caddr_t) &pathname, |
| (xdrproc_t) xdr_fhstatus, |
| (caddr_t) &status, |
| total_timeout); |
| |
| if (clnt_stat == RPC_SUCCESS) |
| break; /* we're done */ |
| if (errno != ECONNREFUSED) { |
| clnt_perror(mclient, "mount"); |
| goto fail; /* don't retry */ |
| } |
| 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 = bb_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) { |
| bb_error_msg("%s:%s failed, reason given by server: %s", |
| hostname, pathname, |
| 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 *my_fhandle; |
| if (status.nfsv3.fhs_status != 0) { |
| bb_error_msg("%s:%s failed, reason given by server: %s", |
| hostname, pathname, |
| nfs_strerror(status.nfsv3.fhs_status)); |
| goto fail; |
| } |
| my_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 = my_fhandle->fhandle3_len; |
| memcpy(data.root.data, |
| (char *) my_fhandle->fhandle3_val, |
| my_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 (get_kernel_revision() <= 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 status) |
| { |
| int i; |
| static char buf[256]; |
| |
| for (i = 0; nfs_errtbl[i].stat != -1; i++) { |
| if (nfs_errtbl[i].stat == status) |
| return strerror(nfs_errtbl[i].errnum); |
| } |
| sprintf(buf, _("unknown nfs status return value: %d"), status); |
| return buf; |
| } |
| |
| static bool_t |
| xdr_fhandle (XDR *xdrs, fhandle objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_opaque (xdrs, objp, FHSIZE)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_fhstatus (XDR *xdrs, fhstatus *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_u_int (xdrs, &objp->fhs_status)) |
| return FALSE; |
| switch (objp->fhs_status) { |
| case 0: |
| if (!xdr_fhandle (xdrs, objp->fhstatus_u.fhs_fhandle)) |
| return FALSE; |
| break; |
| default: |
| break; |
| } |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_dirpath (XDR *xdrs, dirpath *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_string (xdrs, objp, MNTPATHLEN)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_fhandle3 (XDR *xdrs, fhandle3 *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_bytes (xdrs, (char **)&objp->fhandle3_val, (u_int *) &objp->fhandle3_len, FHSIZE3)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_mountres3_ok (XDR *xdrs, mountres3_ok *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_fhandle3 (xdrs, &objp->fhandle)) |
| return FALSE; |
| if (!xdr_array (xdrs, (char **)&objp->auth_flavours.auth_flavours_val, (u_int *) &objp->auth_flavours.auth_flavours_len, ~0, |
| sizeof (int), (xdrproc_t) xdr_int)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_mountstat3 (XDR *xdrs, mountstat3 *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_enum (xdrs, (enum_t *) objp)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| bool_t |
| xdr_mountres3 (XDR *xdrs, mountres3 *objp) |
| { |
| //register int32_t *buf; |
| |
| if (!xdr_mountstat3 (xdrs, &objp->fhs_status)) |
| return FALSE; |
| switch (objp->fhs_status) { |
| case MNT_OK: |
| if (!xdr_mountres3_ok (xdrs, &objp->mountres3_u.mountinfo)) |
| return FALSE; |
| break; |
| default: |
| break; |
| } |
| return TRUE; |
| } |
| |