1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * nfsmount.c -- Linux NFS mount
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4 | * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
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5 | *
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6 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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7 | *
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8 | * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
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9 | * numbers to be specified on the command line.
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10 | *
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11 | * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
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12 | * Omit the call to connect() for Linux version 1.3.11 or later.
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13 | *
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14 | * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
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15 | * Implemented the "bg", "fg" and "retry" mount options for NFS.
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16 | *
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17 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
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18 | * - added Native Language Support
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19 | *
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20 | * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
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21 | * plus NFSv3 stuff.
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22 | */
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23 |
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24 | /*
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25 | * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
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26 | */
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27 |
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28 | #include "busybox.h"
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29 | #include <unistd.h>
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30 | #include <string.h>
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31 | #include <errno.h>
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32 | #include <time.h>
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33 | #include <sys/utsname.h>
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34 | #undef TRUE
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35 | #undef FALSE
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36 | #include <rpc/rpc.h>
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37 | #include <rpc/pmap_prot.h>
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38 | #include <rpc/pmap_clnt.h>
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39 | #include "nfsmount.h"
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40 |
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41 | /* This is just a warning of a common mistake. Possibly this should be a
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42 | * uclibc faq entry rather than in busybox... */
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43 | #if ENABLE_FEATURE_MOUNT_NFS && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
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44 | #error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
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45 | #endif
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46 |
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47 |
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48 | /*
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49 | * NFS stats. The good thing with these values is that NFSv3 errors are
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50 | * a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which
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51 | * no-one uses anyway), so we can happily mix code as long as we make sure
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52 | * no NFSv3 errors are returned to NFSv2 clients.
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53 | * Error codes that have a `--' in the v2 column are not part of the
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54 | * standard, but seem to be widely used nevertheless.
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55 | */
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56 | enum nfs_stat {
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57 | NFS_OK = 0, /* v2 v3 */
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58 | NFSERR_PERM = 1, /* v2 v3 */
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59 | NFSERR_NOENT = 2, /* v2 v3 */
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60 | NFSERR_IO = 5, /* v2 v3 */
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61 | NFSERR_NXIO = 6, /* v2 v3 */
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62 | NFSERR_EAGAIN = 11, /* v2 v3 */
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63 | NFSERR_ACCES = 13, /* v2 v3 */
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64 | NFSERR_EXIST = 17, /* v2 v3 */
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65 | NFSERR_XDEV = 18, /* v3 */
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66 | NFSERR_NODEV = 19, /* v2 v3 */
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67 | NFSERR_NOTDIR = 20, /* v2 v3 */
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68 | NFSERR_ISDIR = 21, /* v2 v3 */
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69 | NFSERR_INVAL = 22, /* v2 v3 that Sun forgot */
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70 | NFSERR_FBIG = 27, /* v2 v3 */
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71 | NFSERR_NOSPC = 28, /* v2 v3 */
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72 | NFSERR_ROFS = 30, /* v2 v3 */
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73 | NFSERR_MLINK = 31, /* v3 */
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74 | NFSERR_OPNOTSUPP = 45, /* v2 v3 */
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75 | NFSERR_NAMETOOLONG = 63, /* v2 v3 */
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76 | NFSERR_NOTEMPTY = 66, /* v2 v3 */
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77 | NFSERR_DQUOT = 69, /* v2 v3 */
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78 | NFSERR_STALE = 70, /* v2 v3 */
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79 | NFSERR_REMOTE = 71, /* v2 v3 */
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80 | NFSERR_WFLUSH = 99, /* v2 */
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81 | NFSERR_BADHANDLE = 10001, /* v3 */
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82 | NFSERR_NOT_SYNC = 10002, /* v3 */
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83 | NFSERR_BAD_COOKIE = 10003, /* v3 */
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84 | NFSERR_NOTSUPP = 10004, /* v3 */
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85 | NFSERR_TOOSMALL = 10005, /* v3 */
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86 | NFSERR_SERVERFAULT = 10006, /* v3 */
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87 | NFSERR_BADTYPE = 10007, /* v3 */
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88 | NFSERR_JUKEBOX = 10008 /* v3 */
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89 | };
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90 |
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91 | #define NFS_PROGRAM 100003
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92 |
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93 |
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94 | enum {
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95 | #ifndef NFS_FHSIZE
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96 | NFS_FHSIZE = 32,
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97 | #endif
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98 | #ifndef NFS_PORT
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99 | NFS_PORT = 2049
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100 | #endif
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101 | };
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102 |
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103 | /* Disable the nls stuff */
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104 | # undef bindtextdomain
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105 | # define bindtextdomain(Domain, Directory) /* empty */
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106 | # undef textdomain
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107 | # define textdomain(Domain) /* empty */
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108 |
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109 | enum {
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110 | S_QUOTA = 128, /* Quota initialized for file/directory/symlink */
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111 | };
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112 |
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113 |
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114 | /*
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115 | * We want to be able to compile mount on old kernels in such a way
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116 | * that the binary will work well on more recent kernels.
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117 | * Thus, if necessary we teach nfsmount.c the structure of new fields
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118 | * that will come later.
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119 | *
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120 | * Moreover, the new kernel includes conflict with glibc includes
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121 | * so it is easiest to ignore the kernel altogether (at compile time).
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122 | */
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123 |
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124 | /* NOTE: Do not make this into a 'static const int' because the pre-processor
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125 | * needs to test this value in some #if statements. */
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126 | #define NFS_MOUNT_VERSION 4
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127 |
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128 | struct nfs2_fh {
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129 | char data[32];
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130 | };
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131 | struct nfs3_fh {
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132 | unsigned short size;
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133 | unsigned char data[64];
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134 | };
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135 |
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136 | struct nfs_mount_data {
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137 | int version; /* 1 */
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138 | int fd; /* 1 */
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139 | struct nfs2_fh old_root; /* 1 */
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140 | int flags; /* 1 */
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141 | int rsize; /* 1 */
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142 | int wsize; /* 1 */
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143 | int timeo; /* 1 */
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144 | int retrans; /* 1 */
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145 | int acregmin; /* 1 */
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146 | int acregmax; /* 1 */
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147 | int acdirmin; /* 1 */
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148 | int acdirmax; /* 1 */
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149 | struct sockaddr_in addr; /* 1 */
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150 | char hostname[256]; /* 1 */
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151 | int namlen; /* 2 */
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152 | unsigned int bsize; /* 3 */
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153 | struct nfs3_fh root; /* 4 */
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154 | };
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155 |
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156 | /* bits in the flags field */
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157 | enum {
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158 | NFS_MOUNT_SOFT = 0x0001, /* 1 */
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159 | NFS_MOUNT_INTR = 0x0002, /* 1 */
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160 | NFS_MOUNT_SECURE = 0x0004, /* 1 */
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161 | NFS_MOUNT_POSIX = 0x0008, /* 1 */
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162 | NFS_MOUNT_NOCTO = 0x0010, /* 1 */
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163 | NFS_MOUNT_NOAC = 0x0020, /* 1 */
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164 | NFS_MOUNT_TCP = 0x0040, /* 2 */
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165 | NFS_MOUNT_VER3 = 0x0080, /* 3 */
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166 | NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
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167 | NFS_MOUNT_NONLM = 0x0200 /* 3 */
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168 | };
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169 |
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170 |
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171 | #define UTIL_LINUX_VERSION "2.10m"
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172 | #define util_linux_version "util-linux-2.10m"
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173 |
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174 | #define HAVE_inet_aton
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175 | #define HAVE_scsi_h
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176 | #define HAVE_blkpg_h
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177 | #define HAVE_kd_h
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178 | #define HAVE_termcap
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179 | #define HAVE_locale_h
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180 | #define HAVE_libintl_h
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181 | #define ENABLE_NLS
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182 | #define HAVE_langinfo_h
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183 | #define HAVE_progname
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184 | #define HAVE_openpty
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185 | #define HAVE_nanosleep
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186 | #define HAVE_personality
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187 | #define HAVE_tm_gmtoff
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188 |
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189 | static char *nfs_strerror(int status);
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190 |
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191 | #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
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192 |
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193 | enum {
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194 | EX_FAIL = 32, /* mount failure */
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195 | EX_BG = 256 /* retry in background (internal only) */
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196 | };
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197 |
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198 |
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199 | /*
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200 | * nfs_mount_version according to the sources seen at compile time.
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201 | */
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202 | static int nfs_mount_version;
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203 |
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204 | /*
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205 | * Unfortunately, the kernel prints annoying console messages
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206 | * in case of an unexpected nfs mount version (instead of
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207 | * just returning some error). Therefore we'll have to try
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208 | * and figure out what version the kernel expects.
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209 | *
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210 | * Variables:
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211 | * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
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212 | * NFS_MOUNT_VERSION: these nfsmount sources at compile time
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213 | * nfs_mount_version: version this source and running kernel can handle
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214 | */
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215 | static void
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216 | find_kernel_nfs_mount_version(void)
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217 | {
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218 | static int kernel_version = 0;
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219 |
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220 | if (kernel_version)
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221 | return;
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222 |
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223 | nfs_mount_version = NFS_MOUNT_VERSION; /* default */
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224 |
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225 | kernel_version = get_linux_version_code();
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226 | if (kernel_version) {
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227 | if (kernel_version < KERNEL_VERSION(2,1,32))
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228 | nfs_mount_version = 1;
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229 | else if (kernel_version < KERNEL_VERSION(2,2,18) ||
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230 | (kernel_version >= KERNEL_VERSION(2,3,0) &&
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231 | kernel_version < KERNEL_VERSION(2,3,99)))
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232 | nfs_mount_version = 3;
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233 | else
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234 | nfs_mount_version = 4; /* since 2.3.99pre4 */
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235 | }
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236 | if (nfs_mount_version > NFS_MOUNT_VERSION)
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237 | nfs_mount_version = NFS_MOUNT_VERSION;
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238 | }
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239 |
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240 | static struct pmap *
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241 | get_mountport(struct sockaddr_in *server_addr,
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242 | long unsigned prog,
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243 | long unsigned version,
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244 | long unsigned proto,
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245 | long unsigned port)
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246 | {
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247 | struct pmaplist *pmap;
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248 | static struct pmap p = {0, 0, 0, 0};
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249 |
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250 | server_addr->sin_port = PMAPPORT;
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251 | pmap = pmap_getmaps(server_addr);
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252 |
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253 | if (version > MAX_NFSPROT)
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254 | version = MAX_NFSPROT;
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255 | if (!prog)
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256 | prog = MOUNTPROG;
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257 | p.pm_prog = prog;
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258 | p.pm_vers = version;
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259 | p.pm_prot = proto;
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260 | p.pm_port = port;
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261 |
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262 | while (pmap) {
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263 | if (pmap->pml_map.pm_prog != prog)
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264 | goto next;
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265 | if (!version && p.pm_vers > pmap->pml_map.pm_vers)
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266 | goto next;
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267 | if (version > 2 && pmap->pml_map.pm_vers != version)
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268 | goto next;
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269 | if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
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270 | goto next;
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271 | if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
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272 | (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) ||
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273 | (port && pmap->pml_map.pm_port != port))
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274 | goto next;
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275 | memcpy(&p, &pmap->pml_map, sizeof(p));
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276 | next:
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277 | pmap = pmap->pml_next;
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278 | }
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279 | if (!p.pm_vers)
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280 | p.pm_vers = MOUNTVERS;
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281 | if (!p.pm_port)
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282 | p.pm_port = MOUNTPORT;
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283 | if (!p.pm_prot)
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284 | p.pm_prot = IPPROTO_TCP;
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285 | return &p;
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286 | }
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287 |
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288 | int nfsmount(const char *spec, const char *node, int *flags,
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289 | char **mount_opts, int running_bg)
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290 | {
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291 | static char *prev_bg_host;
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292 | char hostdir[1024];
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293 | CLIENT *mclient;
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294 | char *hostname;
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295 | char *pathname;
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296 | char *old_opts;
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297 | char *mounthost=NULL;
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298 | char new_opts[1024];
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299 | struct timeval total_timeout;
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300 | enum clnt_stat clnt_stat;
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301 | struct nfs_mount_data data;
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302 | char *opt, *opteq;
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303 | int val;
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304 | struct hostent *hp;
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305 | struct sockaddr_in server_addr;
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306 | struct sockaddr_in mount_server_addr;
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307 | struct pmap* pm_mnt;
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308 | int msock, fsock;
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309 | struct timeval retry_timeout;
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310 | union {
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311 | struct fhstatus nfsv2;
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312 | struct mountres3 nfsv3;
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313 | } status;
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314 | struct stat statbuf;
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315 | char *s;
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316 | int port;
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317 | int mountport;
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318 | int proto;
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319 | int bg;
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320 | int soft;
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321 | int intr;
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322 | int posix;
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323 | int nocto;
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324 | int noac;
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325 | int nolock;
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326 | int retry;
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327 | int tcp;
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328 | int mountprog;
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329 | int mountvers;
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330 | int nfsprog;
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331 | int nfsvers;
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332 | int retval;
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333 | time_t t;
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334 | time_t prevt;
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335 | time_t timeout;
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336 |
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337 | find_kernel_nfs_mount_version();
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338 |
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339 | retval = EX_FAIL;
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340 | msock = fsock = -1;
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341 | mclient = NULL;
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342 | if (strlen(spec) >= sizeof(hostdir)) {
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343 | bb_error_msg("excessively long host:dir argument");
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344 | goto fail;
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345 | }
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346 | strcpy(hostdir, spec);
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347 | if ((s = strchr(hostdir, ':'))) {
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348 | hostname = hostdir;
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349 | pathname = s + 1;
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350 | *s = '\0';
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351 | /* Ignore all but first hostname in replicated mounts
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352 | until they can be fully supported. (mack@sgi.com) */
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353 | if ((s = strchr(hostdir, ','))) {
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354 | *s = '\0';
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355 | bb_error_msg("warning: multiple hostnames not supported");
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356 | }
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357 | } else {
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358 | bb_error_msg("directory to mount not in host:dir format");
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359 | goto fail;
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360 | }
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361 |
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362 | server_addr.sin_family = AF_INET;
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363 | #ifdef HAVE_inet_aton
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364 | if (!inet_aton(hostname, &server_addr.sin_addr))
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365 | #endif
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366 | {
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367 | if ((hp = gethostbyname(hostname)) == NULL) {
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368 | bb_herror_msg("%s", hostname);
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369 | goto fail;
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370 | } else {
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371 | if (hp->h_length > sizeof(struct in_addr)) {
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372 | bb_error_msg("got bad hp->h_length");
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373 | hp->h_length = sizeof(struct in_addr);
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374 | }
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375 | memcpy(&server_addr.sin_addr,
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376 | hp->h_addr, hp->h_length);
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377 | }
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378 | }
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379 |
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380 | memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
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381 |
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382 | /* add IP address to mtab options for use when unmounting */
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383 |
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384 | s = inet_ntoa(server_addr.sin_addr);
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385 | old_opts = *mount_opts;
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386 | if (!old_opts)
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387 | old_opts = "";
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388 | if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
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389 | bb_error_msg("excessively long option argument");
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390 | goto fail;
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391 | }
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392 | sprintf(new_opts, "%s%saddr=%s",
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393 | old_opts, *old_opts ? "," : "", s);
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394 | *mount_opts = bb_xstrdup(new_opts);
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395 |
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396 | /* Set default options.
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397 | * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
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398 | * let the kernel decide.
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399 | * timeo is filled in after we know whether it'll be TCP or UDP. */
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400 | memset(&data, 0, sizeof(data));
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401 | data.retrans = 3;
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402 | data.acregmin = 3;
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403 | data.acregmax = 60;
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404 | data.acdirmin = 30;
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405 | data.acdirmax = 60;
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406 | #if NFS_MOUNT_VERSION >= 2
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407 | data.namlen = NAME_MAX;
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408 | #endif
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409 |
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410 | bg = 0;
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411 | soft = 0;
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412 | intr = 0;
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413 | posix = 0;
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414 | nocto = 0;
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415 | nolock = 0;
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416 | noac = 0;
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417 | retry = 10000; /* 10000 minutes ~ 1 week */
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418 | tcp = 0;
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419 |
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420 | mountprog = MOUNTPROG;
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421 | mountvers = 0;
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422 | port = 0;
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423 | mountport = 0;
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424 | nfsprog = NFS_PROGRAM;
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425 | nfsvers = 0;
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426 |
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427 | /* parse options */
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428 |
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429 | for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
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430 | if ((opteq = strchr(opt, '='))) {
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431 | val = atoi(opteq + 1);
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432 | *opteq = '\0';
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433 | if (!strcmp(opt, "rsize"))
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434 | data.rsize = val;
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435 | else if (!strcmp(opt, "wsize"))
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436 | data.wsize = val;
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437 | else if (!strcmp(opt, "timeo"))
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438 | data.timeo = val;
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439 | else if (!strcmp(opt, "retrans"))
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440 | data.retrans = val;
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441 | else if (!strcmp(opt, "acregmin"))
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442 | data.acregmin = val;
|
---|
443 | else if (!strcmp(opt, "acregmax"))
|
---|
444 | data.acregmax = val;
|
---|
445 | else if (!strcmp(opt, "acdirmin"))
|
---|
446 | data.acdirmin = val;
|
---|
447 | else if (!strcmp(opt, "acdirmax"))
|
---|
448 | data.acdirmax = val;
|
---|
449 | else if (!strcmp(opt, "actimeo")) {
|
---|
450 | data.acregmin = val;
|
---|
451 | data.acregmax = val;
|
---|
452 | data.acdirmin = val;
|
---|
453 | data.acdirmax = val;
|
---|
454 | }
|
---|
455 | else if (!strcmp(opt, "retry"))
|
---|
456 | retry = val;
|
---|
457 | else if (!strcmp(opt, "port"))
|
---|
458 | port = val;
|
---|
459 | else if (!strcmp(opt, "mountport"))
|
---|
460 | mountport = val;
|
---|
461 | else if (!strcmp(opt, "mounthost"))
|
---|
462 | mounthost=bb_xstrndup(opteq+1,
|
---|
463 | strcspn(opteq+1," \t\n\r,"));
|
---|
464 | else if (!strcmp(opt, "mountprog"))
|
---|
465 | mountprog = val;
|
---|
466 | else if (!strcmp(opt, "mountvers"))
|
---|
467 | mountvers = val;
|
---|
468 | else if (!strcmp(opt, "nfsprog"))
|
---|
469 | nfsprog = val;
|
---|
470 | else if (!strcmp(opt, "nfsvers") ||
|
---|
471 | !strcmp(opt, "vers"))
|
---|
472 | nfsvers = val;
|
---|
473 | else if (!strcmp(opt, "proto")) {
|
---|
474 | if (!strncmp(opteq+1, "tcp", 3))
|
---|
475 | tcp = 1;
|
---|
476 | else if (!strncmp(opteq+1, "udp", 3))
|
---|
477 | tcp = 0;
|
---|
478 | else
|
---|
479 | printf("Warning: Unrecognized proto= option.\n");
|
---|
480 | } else if (!strcmp(opt, "namlen")) {
|
---|
481 | #if NFS_MOUNT_VERSION >= 2
|
---|
482 | if (nfs_mount_version >= 2)
|
---|
483 | data.namlen = val;
|
---|
484 | else
|
---|
485 | #endif
|
---|
486 | printf("Warning: Option namlen is not supported.\n");
|
---|
487 | } else if (!strcmp(opt, "addr"))
|
---|
488 | /* ignore */;
|
---|
489 | else {
|
---|
490 | printf("unknown nfs mount parameter: %s=%d\n", opt, val);
|
---|
491 | goto fail;
|
---|
492 | }
|
---|
493 | }
|
---|
494 | else {
|
---|
495 | val = 1;
|
---|
496 | if (!strncmp(opt, "no", 2)) {
|
---|
497 | val = 0;
|
---|
498 | opt += 2;
|
---|
499 | }
|
---|
500 | if (!strcmp(opt, "bg"))
|
---|
501 | bg = val;
|
---|
502 | else if (!strcmp(opt, "fg"))
|
---|
503 | bg = !val;
|
---|
504 | else if (!strcmp(opt, "soft"))
|
---|
505 | soft = val;
|
---|
506 | else if (!strcmp(opt, "hard"))
|
---|
507 | soft = !val;
|
---|
508 | else if (!strcmp(opt, "intr"))
|
---|
509 | intr = val;
|
---|
510 | else if (!strcmp(opt, "posix"))
|
---|
511 | posix = val;
|
---|
512 | else if (!strcmp(opt, "cto"))
|
---|
513 | nocto = !val;
|
---|
514 | else if (!strcmp(opt, "ac"))
|
---|
515 | noac = !val;
|
---|
516 | else if (!strcmp(opt, "tcp"))
|
---|
517 | tcp = val;
|
---|
518 | else if (!strcmp(opt, "udp"))
|
---|
519 | tcp = !val;
|
---|
520 | else if (!strcmp(opt, "lock")) {
|
---|
521 | if (nfs_mount_version >= 3)
|
---|
522 | nolock = !val;
|
---|
523 | else
|
---|
524 | printf("Warning: option nolock is not supported.\n");
|
---|
525 | } else {
|
---|
526 | printf("unknown nfs mount option: %s%s\n", val ? "" : "no", opt);
|
---|
527 | goto fail;
|
---|
528 | }
|
---|
529 | }
|
---|
530 | }
|
---|
531 | proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
|
---|
532 |
|
---|
533 | data.flags = (soft ? NFS_MOUNT_SOFT : 0)
|
---|
534 | | (intr ? NFS_MOUNT_INTR : 0)
|
---|
535 | | (posix ? NFS_MOUNT_POSIX : 0)
|
---|
536 | | (nocto ? NFS_MOUNT_NOCTO : 0)
|
---|
537 | | (noac ? NFS_MOUNT_NOAC : 0);
|
---|
538 | #if NFS_MOUNT_VERSION >= 2
|
---|
539 | if (nfs_mount_version >= 2)
|
---|
540 | data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
|
---|
541 | #endif
|
---|
542 | #if NFS_MOUNT_VERSION >= 3
|
---|
543 | if (nfs_mount_version >= 3)
|
---|
544 | data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
|
---|
545 | #endif
|
---|
546 | if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
|
---|
547 | bb_error_msg("NFSv%d not supported!", nfsvers);
|
---|
548 | return 1;
|
---|
549 | }
|
---|
550 | if (nfsvers && !mountvers)
|
---|
551 | mountvers = (nfsvers < 3) ? 1 : nfsvers;
|
---|
552 | if (nfsvers && nfsvers < mountvers) {
|
---|
553 | mountvers = nfsvers;
|
---|
554 | }
|
---|
555 |
|
---|
556 | /* Adjust options if none specified */
|
---|
557 | if (!data.timeo)
|
---|
558 | data.timeo = tcp ? 70 : 7;
|
---|
559 |
|
---|
560 | #ifdef NFS_MOUNT_DEBUG
|
---|
561 | printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
|
---|
562 | data.rsize, data.wsize, data.timeo, data.retrans);
|
---|
563 | printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
|
---|
564 | data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
|
---|
565 | printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
|
---|
566 | port, bg, retry, data.flags);
|
---|
567 | printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
|
---|
568 | mountprog, mountvers, nfsprog, nfsvers);
|
---|
569 | printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n",
|
---|
570 | (data.flags & NFS_MOUNT_SOFT) != 0,
|
---|
571 | (data.flags & NFS_MOUNT_INTR) != 0,
|
---|
572 | (data.flags & NFS_MOUNT_POSIX) != 0,
|
---|
573 | (data.flags & NFS_MOUNT_NOCTO) != 0,
|
---|
574 | (data.flags & NFS_MOUNT_NOAC) != 0);
|
---|
575 | #if NFS_MOUNT_VERSION >= 2
|
---|
576 | printf("tcp = %d\n",
|
---|
577 | (data.flags & NFS_MOUNT_TCP) != 0);
|
---|
578 | #endif
|
---|
579 | #endif
|
---|
580 |
|
---|
581 | data.version = nfs_mount_version;
|
---|
582 |
|
---|
583 | if (*flags & MS_REMOUNT)
|
---|
584 | goto copy_data_and_return;
|
---|
585 |
|
---|
586 | /*
|
---|
587 | * If the previous mount operation on the same host was
|
---|
588 | * backgrounded, and the "bg" for this mount is also set,
|
---|
589 | * give up immediately, to avoid the initial timeout.
|
---|
590 | */
|
---|
591 | if (bg && !running_bg &&
|
---|
592 | prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
|
---|
593 | if (retry > 0)
|
---|
594 | retval = EX_BG;
|
---|
595 | return retval;
|
---|
596 | }
|
---|
597 |
|
---|
598 | /* create mount daemon client */
|
---|
599 | /* See if the nfs host = mount host. */
|
---|
600 | if (mounthost) {
|
---|
601 | if (mounthost[0] >= '0' && mounthost[0] <= '9') {
|
---|
602 | mount_server_addr.sin_family = AF_INET;
|
---|
603 | mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
|
---|
604 | } else {
|
---|
605 | if ((hp = gethostbyname(mounthost)) == NULL) {
|
---|
606 | bb_herror_msg("%s", mounthost);
|
---|
607 | goto fail;
|
---|
608 | } else {
|
---|
609 | if (hp->h_length > sizeof(struct in_addr)) {
|
---|
610 | bb_error_msg("got bad hp->h_length?");
|
---|
611 | hp->h_length = sizeof(struct in_addr);
|
---|
612 | }
|
---|
613 | mount_server_addr.sin_family = AF_INET;
|
---|
614 | memcpy(&mount_server_addr.sin_addr,
|
---|
615 | hp->h_addr, hp->h_length);
|
---|
616 | }
|
---|
617 | }
|
---|
618 | }
|
---|
619 |
|
---|
620 | /*
|
---|
621 | * The following loop implements the mount retries. On the first
|
---|
622 | * call, "running_bg" is 0. When the mount times out, and the
|
---|
623 | * "bg" option is set, the exit status EX_BG will be returned.
|
---|
624 | * For a backgrounded mount, there will be a second call by the
|
---|
625 | * child process with "running_bg" set to 1.
|
---|
626 | *
|
---|
627 | * The case where the mount point is not present and the "bg"
|
---|
628 | * option is set, is treated as a timeout. This is done to
|
---|
629 | * support nested mounts.
|
---|
630 | *
|
---|
631 | * The "retry" count specified by the user is the number of
|
---|
632 | * minutes to retry before giving up.
|
---|
633 | *
|
---|
634 | * Only the first error message will be displayed.
|
---|
635 | */
|
---|
636 | retry_timeout.tv_sec = 3;
|
---|
637 | retry_timeout.tv_usec = 0;
|
---|
638 | total_timeout.tv_sec = 20;
|
---|
639 | total_timeout.tv_usec = 0;
|
---|
640 | timeout = time(NULL) + 60 * retry;
|
---|
641 | prevt = 0;
|
---|
642 | t = 30;
|
---|
643 | val = 1;
|
---|
644 | for (;;) {
|
---|
645 | if (bg && stat(node, &statbuf) == -1) {
|
---|
646 | if (running_bg) {
|
---|
647 | sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
|
---|
648 | val *= 2;
|
---|
649 | if (val > 30)
|
---|
650 | val = 30;
|
---|
651 | }
|
---|
652 | } else {
|
---|
653 | /* be careful not to use too many CPU cycles */
|
---|
654 | if (t - prevt < 30)
|
---|
655 | sleep(30);
|
---|
656 |
|
---|
657 | pm_mnt = get_mountport(&mount_server_addr,
|
---|
658 | mountprog,
|
---|
659 | mountvers,
|
---|
660 | proto,
|
---|
661 | mountport);
|
---|
662 |
|
---|
663 | /* contact the mount daemon via TCP */
|
---|
664 | mount_server_addr.sin_port = htons(pm_mnt->pm_port);
|
---|
665 | msock = RPC_ANYSOCK;
|
---|
666 |
|
---|
667 | switch (pm_mnt->pm_prot) {
|
---|
668 | case IPPROTO_UDP:
|
---|
669 | mclient = clntudp_create(&mount_server_addr,
|
---|
670 | pm_mnt->pm_prog,
|
---|
671 | pm_mnt->pm_vers,
|
---|
672 | retry_timeout,
|
---|
673 | &msock);
|
---|
674 | if (mclient)
|
---|
675 | break;
|
---|
676 | mount_server_addr.sin_port = htons(pm_mnt->pm_port);
|
---|
677 | msock = RPC_ANYSOCK;
|
---|
678 | case IPPROTO_TCP:
|
---|
679 | mclient = clnttcp_create(&mount_server_addr,
|
---|
680 | pm_mnt->pm_prog,
|
---|
681 | pm_mnt->pm_vers,
|
---|
682 | &msock, 0, 0);
|
---|
683 | break;
|
---|
684 | default:
|
---|
685 | mclient = 0;
|
---|
686 | }
|
---|
687 | if (mclient) {
|
---|
688 | /* try to mount hostname:pathname */
|
---|
689 | mclient->cl_auth = authunix_create_default();
|
---|
690 |
|
---|
691 | /* make pointers in xdr_mountres3 NULL so
|
---|
692 | * that xdr_array allocates memory for us
|
---|
693 | */
|
---|
694 | memset(&status, 0, sizeof(status));
|
---|
695 |
|
---|
696 | if (pm_mnt->pm_vers == 3)
|
---|
697 | clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
|
---|
698 | (xdrproc_t) xdr_dirpath,
|
---|
699 | (caddr_t) &pathname,
|
---|
700 | (xdrproc_t) xdr_mountres3,
|
---|
701 | (caddr_t) &status,
|
---|
702 | total_timeout);
|
---|
703 | else
|
---|
704 | clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
|
---|
705 | (xdrproc_t) xdr_dirpath,
|
---|
706 | (caddr_t) &pathname,
|
---|
707 | (xdrproc_t) xdr_fhstatus,
|
---|
708 | (caddr_t) &status,
|
---|
709 | total_timeout);
|
---|
710 |
|
---|
711 | if (clnt_stat == RPC_SUCCESS)
|
---|
712 | break; /* we're done */
|
---|
713 | if (errno != ECONNREFUSED) {
|
---|
714 | clnt_perror(mclient, "mount");
|
---|
715 | goto fail; /* don't retry */
|
---|
716 | }
|
---|
717 | if (!running_bg && prevt == 0)
|
---|
718 | clnt_perror(mclient, "mount");
|
---|
719 | auth_destroy(mclient->cl_auth);
|
---|
720 | clnt_destroy(mclient);
|
---|
721 | mclient = 0;
|
---|
722 | close(msock);
|
---|
723 | } else {
|
---|
724 | if (!running_bg && prevt == 0)
|
---|
725 | clnt_pcreateerror("mount");
|
---|
726 | }
|
---|
727 | prevt = t;
|
---|
728 | }
|
---|
729 | if (!bg)
|
---|
730 | goto fail;
|
---|
731 | if (!running_bg) {
|
---|
732 | prev_bg_host = bb_xstrdup(hostname);
|
---|
733 | if (retry > 0)
|
---|
734 | retval = EX_BG;
|
---|
735 | goto fail;
|
---|
736 | }
|
---|
737 | t = time(NULL);
|
---|
738 | if (t >= timeout)
|
---|
739 | goto fail;
|
---|
740 | }
|
---|
741 | nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
|
---|
742 |
|
---|
743 | if (nfsvers == 2) {
|
---|
744 | if (status.nfsv2.fhs_status != 0) {
|
---|
745 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
746 | hostname, pathname,
|
---|
747 | nfs_strerror(status.nfsv2.fhs_status));
|
---|
748 | goto fail;
|
---|
749 | }
|
---|
750 | memcpy(data.root.data,
|
---|
751 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
752 | NFS_FHSIZE);
|
---|
753 | #if NFS_MOUNT_VERSION >= 4
|
---|
754 | data.root.size = NFS_FHSIZE;
|
---|
755 | memcpy(data.old_root.data,
|
---|
756 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
757 | NFS_FHSIZE);
|
---|
758 | #endif
|
---|
759 | } else {
|
---|
760 | #if NFS_MOUNT_VERSION >= 4
|
---|
761 | fhandle3 *my_fhandle;
|
---|
762 | if (status.nfsv3.fhs_status != 0) {
|
---|
763 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
764 | hostname, pathname,
|
---|
765 | nfs_strerror(status.nfsv3.fhs_status));
|
---|
766 | goto fail;
|
---|
767 | }
|
---|
768 | my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
|
---|
769 | memset(data.old_root.data, 0, NFS_FHSIZE);
|
---|
770 | memset(&data.root, 0, sizeof(data.root));
|
---|
771 | data.root.size = my_fhandle->fhandle3_len;
|
---|
772 | memcpy(data.root.data,
|
---|
773 | (char *) my_fhandle->fhandle3_val,
|
---|
774 | my_fhandle->fhandle3_len);
|
---|
775 |
|
---|
776 | data.flags |= NFS_MOUNT_VER3;
|
---|
777 | #endif
|
---|
778 | }
|
---|
779 |
|
---|
780 | /* create nfs socket for kernel */
|
---|
781 |
|
---|
782 | if (tcp) {
|
---|
783 | if (nfs_mount_version < 3) {
|
---|
784 | printf("NFS over TCP is not supported.\n");
|
---|
785 | goto fail;
|
---|
786 | }
|
---|
787 | fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
---|
788 | } else
|
---|
789 | fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
---|
790 | if (fsock < 0) {
|
---|
791 | perror("nfs socket");
|
---|
792 | goto fail;
|
---|
793 | }
|
---|
794 | if (bindresvport(fsock, 0) < 0) {
|
---|
795 | perror("nfs bindresvport");
|
---|
796 | goto fail;
|
---|
797 | }
|
---|
798 | if (port == 0) {
|
---|
799 | server_addr.sin_port = PMAPPORT;
|
---|
800 | port = pmap_getport(&server_addr, nfsprog, nfsvers,
|
---|
801 | tcp ? IPPROTO_TCP : IPPROTO_UDP);
|
---|
802 | if (port == 0)
|
---|
803 | port = NFS_PORT;
|
---|
804 | #ifdef NFS_MOUNT_DEBUG
|
---|
805 | else
|
---|
806 | printf("used portmapper to find NFS port\n");
|
---|
807 | #endif
|
---|
808 | }
|
---|
809 | #ifdef NFS_MOUNT_DEBUG
|
---|
810 | printf("using port %d for nfs daemon\n", port);
|
---|
811 | #endif
|
---|
812 | server_addr.sin_port = htons(port);
|
---|
813 | /*
|
---|
814 | * connect() the socket for kernels 1.3.10 and below only,
|
---|
815 | * to avoid problems with multihomed hosts.
|
---|
816 | * --Swen
|
---|
817 | */
|
---|
818 | if (get_linux_version_code() <= KERNEL_VERSION(2,3,10)
|
---|
819 | && connect(fsock, (struct sockaddr *) &server_addr,
|
---|
820 | sizeof (server_addr)) < 0) {
|
---|
821 | perror("nfs connect");
|
---|
822 | goto fail;
|
---|
823 | }
|
---|
824 |
|
---|
825 | /* prepare data structure for kernel */
|
---|
826 |
|
---|
827 | data.fd = fsock;
|
---|
828 | memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
|
---|
829 | strncpy(data.hostname, hostname, sizeof(data.hostname));
|
---|
830 |
|
---|
831 | /* clean up */
|
---|
832 |
|
---|
833 | auth_destroy(mclient->cl_auth);
|
---|
834 | clnt_destroy(mclient);
|
---|
835 | close(msock);
|
---|
836 | copy_data_and_return:
|
---|
837 | *mount_opts = xrealloc(*mount_opts, sizeof(data));
|
---|
838 | memcpy(*mount_opts, &data, sizeof(data));
|
---|
839 | return 0;
|
---|
840 |
|
---|
841 | /* abort */
|
---|
842 |
|
---|
843 | fail:
|
---|
844 | if (msock != -1) {
|
---|
845 | if (mclient) {
|
---|
846 | auth_destroy(mclient->cl_auth);
|
---|
847 | clnt_destroy(mclient);
|
---|
848 | }
|
---|
849 | close(msock);
|
---|
850 | }
|
---|
851 | if (fsock != -1)
|
---|
852 | close(fsock);
|
---|
853 | return retval;
|
---|
854 | }
|
---|
855 |
|
---|
856 | /*
|
---|
857 | * We need to translate between nfs status return values and
|
---|
858 | * the local errno values which may not be the same.
|
---|
859 | *
|
---|
860 | * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
|
---|
861 | * "after #include <errno.h> the symbol errno is reserved for any use,
|
---|
862 | * it cannot even be used as a struct tag or field name".
|
---|
863 | */
|
---|
864 |
|
---|
865 | #ifndef EDQUOT
|
---|
866 | #define EDQUOT ENOSPC
|
---|
867 | #endif
|
---|
868 |
|
---|
869 | static const struct {
|
---|
870 | enum nfs_stat stat;
|
---|
871 | int errnum;
|
---|
872 | } nfs_errtbl[] = {
|
---|
873 | { NFS_OK, 0 },
|
---|
874 | { NFSERR_PERM, EPERM },
|
---|
875 | { NFSERR_NOENT, ENOENT },
|
---|
876 | { NFSERR_IO, EIO },
|
---|
877 | { NFSERR_NXIO, ENXIO },
|
---|
878 | { NFSERR_ACCES, EACCES },
|
---|
879 | { NFSERR_EXIST, EEXIST },
|
---|
880 | { NFSERR_NODEV, ENODEV },
|
---|
881 | { NFSERR_NOTDIR, ENOTDIR },
|
---|
882 | { NFSERR_ISDIR, EISDIR },
|
---|
883 | #ifdef NFSERR_INVAL
|
---|
884 | { NFSERR_INVAL, EINVAL }, /* that Sun forgot */
|
---|
885 | #endif
|
---|
886 | { NFSERR_FBIG, EFBIG },
|
---|
887 | { NFSERR_NOSPC, ENOSPC },
|
---|
888 | { NFSERR_ROFS, EROFS },
|
---|
889 | { NFSERR_NAMETOOLONG, ENAMETOOLONG },
|
---|
890 | { NFSERR_NOTEMPTY, ENOTEMPTY },
|
---|
891 | { NFSERR_DQUOT, EDQUOT },
|
---|
892 | { NFSERR_STALE, ESTALE },
|
---|
893 | #ifdef EWFLUSH
|
---|
894 | { NFSERR_WFLUSH, EWFLUSH },
|
---|
895 | #endif
|
---|
896 | /* Throw in some NFSv3 values for even more fun (HP returns these) */
|
---|
897 | { 71, EREMOTE },
|
---|
898 |
|
---|
899 | { -1, EIO }
|
---|
900 | };
|
---|
901 |
|
---|
902 | static char *nfs_strerror(int status)
|
---|
903 | {
|
---|
904 | int i;
|
---|
905 | static char buf[256];
|
---|
906 |
|
---|
907 | for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
---|
908 | if (nfs_errtbl[i].stat == status)
|
---|
909 | return strerror(nfs_errtbl[i].errnum);
|
---|
910 | }
|
---|
911 | sprintf(buf, "unknown nfs status return value: %d", status);
|
---|
912 | return buf;
|
---|
913 | }
|
---|
914 |
|
---|
915 | static bool_t
|
---|
916 | xdr_fhandle (XDR *xdrs, fhandle objp)
|
---|
917 | {
|
---|
918 | if (!xdr_opaque (xdrs, objp, FHSIZE))
|
---|
919 | return FALSE;
|
---|
920 | return TRUE;
|
---|
921 | }
|
---|
922 |
|
---|
923 | bool_t
|
---|
924 | xdr_fhstatus (XDR *xdrs, fhstatus *objp)
|
---|
925 | {
|
---|
926 | if (!xdr_u_int (xdrs, &objp->fhs_status))
|
---|
927 | return FALSE;
|
---|
928 | switch (objp->fhs_status) {
|
---|
929 | case 0:
|
---|
930 | if (!xdr_fhandle (xdrs, objp->fhstatus_u.fhs_fhandle))
|
---|
931 | return FALSE;
|
---|
932 | break;
|
---|
933 | default:
|
---|
934 | break;
|
---|
935 | }
|
---|
936 | return TRUE;
|
---|
937 | }
|
---|
938 |
|
---|
939 | bool_t
|
---|
940 | xdr_dirpath (XDR *xdrs, dirpath *objp)
|
---|
941 | {
|
---|
942 | if (!xdr_string (xdrs, objp, MNTPATHLEN))
|
---|
943 | return FALSE;
|
---|
944 | return TRUE;
|
---|
945 | }
|
---|
946 |
|
---|
947 | bool_t
|
---|
948 | xdr_fhandle3 (XDR *xdrs, fhandle3 *objp)
|
---|
949 | {
|
---|
950 | if (!xdr_bytes (xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
|
---|
951 | return FALSE;
|
---|
952 | return TRUE;
|
---|
953 | }
|
---|
954 |
|
---|
955 | bool_t
|
---|
956 | xdr_mountres3_ok (XDR *xdrs, mountres3_ok *objp)
|
---|
957 | {
|
---|
958 | if (!xdr_fhandle3 (xdrs, &objp->fhandle))
|
---|
959 | return FALSE;
|
---|
960 | if (!xdr_array (xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0,
|
---|
961 | sizeof (int), (xdrproc_t) xdr_int))
|
---|
962 | return FALSE;
|
---|
963 | return TRUE;
|
---|
964 | }
|
---|
965 |
|
---|
966 | bool_t
|
---|
967 | xdr_mountstat3 (XDR *xdrs, mountstat3 *objp)
|
---|
968 | {
|
---|
969 | if (!xdr_enum (xdrs, (enum_t *) objp))
|
---|
970 | return FALSE;
|
---|
971 | return TRUE;
|
---|
972 | }
|
---|
973 |
|
---|
974 | bool_t
|
---|
975 | xdr_mountres3 (XDR *xdrs, mountres3 *objp)
|
---|
976 | {
|
---|
977 | if (!xdr_mountstat3 (xdrs, &objp->fhs_status))
|
---|
978 | return FALSE;
|
---|
979 | switch (objp->fhs_status) {
|
---|
980 | case MNT_OK:
|
---|
981 | if (!xdr_mountres3_ok (xdrs, &objp->mountres3_u.mountinfo))
|
---|
982 | return FALSE;
|
---|
983 | break;
|
---|
984 | default:
|
---|
985 | break;
|
---|
986 | }
|
---|
987 | return TRUE;
|
---|
988 | }
|
---|
989 |
|
---|