1 | /* $Id$ */ |
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2 | |
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3 | /* NFS client implementation for RTEMS; hooks into the RTEMS filesystem */ |
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4 | |
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5 | /* Author: Till Straumann <strauman@slac.stanford.edu> 2002 */ |
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6 | |
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7 | /* |
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8 | * Hacked on by others. |
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9 | * |
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10 | * Modifications to support reference counting in the file system are |
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11 | * Copyright (c) 2012 embedded brains GmbH. |
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12 | */ |
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13 | |
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14 | /* |
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15 | * Authorship |
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16 | * ---------- |
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17 | * This software (NFS-2 client implementation for RTEMS) was created by |
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18 | * Till Straumann <strauman@slac.stanford.edu>, 2002-2007, |
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19 | * Stanford Linear Accelerator Center, Stanford University. |
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20 | * |
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21 | * Acknowledgement of sponsorship |
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22 | * ------------------------------ |
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23 | * The NFS-2 client implementation for RTEMS was produced by |
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24 | * the Stanford Linear Accelerator Center, Stanford University, |
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25 | * under Contract DE-AC03-76SFO0515 with the Department of Energy. |
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26 | * |
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27 | * Government disclaimer of liability |
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28 | * ---------------------------------- |
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29 | * Neither the United States nor the United States Department of Energy, |
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30 | * nor any of their employees, makes any warranty, express or implied, or |
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31 | * assumes any legal liability or responsibility for the accuracy, |
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32 | * completeness, or usefulness of any data, apparatus, product, or process |
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33 | * disclosed, or represents that its use would not infringe privately owned |
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34 | * rights. |
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35 | * |
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36 | * Stanford disclaimer of liability |
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37 | * -------------------------------- |
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38 | * Stanford University makes no representations or warranties, express or |
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39 | * implied, nor assumes any liability for the use of this software. |
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40 | * |
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41 | * Stanford disclaimer of copyright |
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42 | * -------------------------------- |
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43 | * Stanford University, owner of the copyright, hereby disclaims its |
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44 | * copyright and all other rights in this software. Hence, anyone may |
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45 | * freely use it for any purpose without restriction. |
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46 | * |
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47 | * Maintenance of notices |
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48 | * ---------------------- |
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49 | * In the interest of clarity regarding the origin and status of this |
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50 | * SLAC software, this and all the preceding Stanford University notices |
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51 | * are to remain affixed to any copy or derivative of this software made |
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52 | * or distributed by the recipient and are to be affixed to any copy of |
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53 | * software made or distributed by the recipient that contains a copy or |
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54 | * derivative of this software. |
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55 | * |
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56 | * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 |
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57 | */ |
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58 | |
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59 | #ifdef HAVE_CONFIG_H |
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60 | #include <config.h> |
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61 | #endif |
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62 | |
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63 | #include <rtems.h> |
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64 | #include <rtems/libio.h> |
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65 | #include <rtems/libio_.h> |
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66 | #include <rtems/seterr.h> |
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67 | #include <string.h> |
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68 | #include <stdio.h> |
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69 | #include <stdlib.h> |
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70 | #include <assert.h> |
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71 | #include <sys/stat.h> |
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72 | #include <dirent.h> |
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73 | #include <netdb.h> |
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74 | #include <ctype.h> |
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75 | #include <netinet/in.h> |
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76 | #include <arpa/inet.h> |
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77 | |
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78 | #include <nfs_prot.h> |
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79 | #include <mount_prot.h> |
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80 | |
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81 | #include "rpcio.h" |
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82 | #include "librtemsNfs.h" |
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83 | |
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84 | /* Configurable parameters */ |
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85 | |
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86 | /* Estimated average length of a filename (including terminating 0). |
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87 | * This was calculated by doing |
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88 | * |
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89 | * find <some root> -print -exec basename '{}' \; > feil |
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90 | * wc feil |
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91 | * |
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92 | * AVG_NAMLEN = (num_chars + num_lines)/num_lines |
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93 | */ |
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94 | #define CONFIG_AVG_NAMLEN 10 |
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95 | |
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96 | #define CONFIG_NFS_SMALL_XACT_SIZE 800 /* size of RPC arguments for non-write ops */ |
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97 | /* lifetime of NFS attributes in a NfsNode; |
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98 | * the time is in seconds and the lifetime is |
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99 | * infinite if the symbol is #undef |
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100 | */ |
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101 | #define CONFIG_ATTR_LIFETIME 10/*secs*/ |
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102 | |
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103 | /* |
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104 | * The 'st_blksize' (stat(2)) value this nfs |
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105 | * client should report. If set to zero then the server's fattr data |
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106 | * is passed throught which is not necessary optimal. |
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107 | * Newlib's stdio uses 'st_blksize' (if built with HAVE_BLKSIZE defined) |
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108 | * to size the default buffer. |
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109 | * Due to the overhead of NFS it is probably better to use the maximum |
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110 | * size of an NFS read request (8k) rather than the optimal block |
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111 | * size on the server. |
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112 | * This value can be overridden at run-time by setting the global |
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113 | * variable 'nfsStBlksize'. |
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114 | * Thanks to Steven Johnson <sjohnson@sakuraindustries.com> for helping |
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115 | * working on this issue. |
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116 | */ |
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117 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
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118 | |
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119 | /* dont change this without changing the maximal write size */ |
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120 | #define CONFIG_NFS_BIG_XACT_SIZE UDPMSGSIZE /* dont change this */ |
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121 | |
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122 | /* The real values for these are specified further down */ |
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123 | #define NFSCALL_TIMEOUT (&_nfscalltimeout) |
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124 | #define MNTCALL_TIMEOUT (&_nfscalltimeout) |
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125 | static struct timeval _nfscalltimeout = { 10, 0 }; /* {secs, us } */ |
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126 | |
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127 | /* More or less fixed constants; in particular, NFS3 is not supported */ |
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128 | #define DELIM '/' |
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129 | #define HOSTDELIM ':' |
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130 | #define UPDIR ".." |
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131 | #define UIDSEP '@' |
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132 | #define NFS_VERSION_2 NFS_VERSION |
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133 | |
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134 | /* we use a dynamically assigned major number */ |
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135 | #define NFS_MAJOR (nfsGlob.nfs_major) |
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136 | |
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137 | |
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138 | /* NOTE: RTEMS (ss-20020301) uses a 'short st_ino' type :-( but the |
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139 | * NFS fileid is 32 bit. [Later versions of RTEMS have fixed this; |
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140 | * nfsInit() issues a warning if you run a version with 'short st_ino'.] |
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141 | * |
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142 | * As a workarount, we merge the upper 16bits of the fileid into the |
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143 | * minor device no. Hence, it is still possible to uniquely identify |
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144 | * a file by looking at its device number (major = nfs, minor = part |
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145 | * of the fileid + our 'nfs-id' identifier). |
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146 | * |
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147 | * This has an impact on performance, as e.g. getcwd() stats() all |
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148 | * directory entries when it believes it has crossed a mount point |
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149 | * (a.st_dev != b.st_dev). |
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150 | * |
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151 | * OTOH, it also might cause node comparison failure! E.g. 'getcwd()' |
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152 | * assumes that two nodes residing in the same directory must be located |
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153 | * on the same device and hence compares 'st_ino' only. |
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154 | * If two files in the same directory have the same inode number |
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155 | * modulo 2^16, they will be considered equal (although their device |
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156 | * number doesn't match - getcwd doesn't look at it). |
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157 | * |
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158 | * Other software might or might not be affected. |
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159 | * |
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160 | * The only clean solution to this problem is bumping up the size of |
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161 | * 'ino_t' at least to 'long'. |
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162 | * Note that this requires _all_ software (libraries etc.) to be |
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163 | * recompiled. |
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164 | */ |
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165 | |
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166 | #define NFS_MAKE_DEV_T_INO_HACK(node) \ |
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167 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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168 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (((rtems_device_minor_number)SERP_ATTR((node)).fileid) >> 16) ) |
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169 | |
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170 | /* use our 'nfs id' and the server's fsid for the minor device number |
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171 | * this should be fairly unique |
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172 | */ |
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173 | #define NFS_MAKE_DEV_T(node) \ |
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174 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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175 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (SERP_ATTR((node)).fsid & (((rtems_device_minor_number)1<<16)-1)) ) |
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176 | |
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177 | #define DIRENT_HEADER_SIZE ( sizeof(struct dirent) - \ |
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178 | sizeof( ((struct dirent *)0)->d_name ) ) |
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179 | |
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180 | |
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181 | /* debugging flags */ |
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182 | #define DEBUG_COUNT_NODES (1<<0) |
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183 | #define DEBUG_TRACK_NODES (1<<1) |
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184 | #define DEBUG_EVALPATH (1<<2) |
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185 | #define DEBUG_READDIR (1<<3) |
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186 | #define DEBUG_SYSCALLS (1<<4) |
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187 | |
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188 | /* #define DEBUG ( DEBUG_SYSCALLS | DEBUG_COUNT_NODES ) */ |
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189 | |
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190 | #ifdef DEBUG |
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191 | #define STATIC |
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192 | #else |
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193 | #define STATIC static |
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194 | #endif |
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195 | |
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196 | #define MUTEX_ATTRIBUTES (RTEMS_LOCAL | \ |
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197 | RTEMS_PRIORITY | \ |
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198 | RTEMS_INHERIT_PRIORITY | \ |
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199 | RTEMS_BINARY_SEMAPHORE) |
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200 | |
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201 | #define LOCK(s) do { \ |
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202 | rtems_semaphore_obtain((s), \ |
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203 | RTEMS_WAIT, \ |
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204 | RTEMS_NO_TIMEOUT); \ |
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205 | } while (0) |
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206 | |
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207 | #define UNLOCK(s) do { rtems_semaphore_release((s)); \ |
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208 | } while (0) |
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209 | |
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210 | static inline char * |
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211 | nfs_dupname(const char *name, size_t namelen) |
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212 | { |
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213 | char *dupname = malloc(namelen + 1); |
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214 | |
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215 | if (dupname != NULL) { |
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216 | memcpy(dupname, name, namelen); |
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217 | dupname [namelen] = '\0'; |
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218 | } else { |
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219 | errno = ENOMEM; |
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220 | } |
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221 | |
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222 | return dupname; |
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223 | } |
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224 | |
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225 | /***************************************** |
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226 | Types with Associated XDR Routines |
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227 | *****************************************/ |
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228 | |
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229 | /* a string buffer with a maximal length. |
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230 | * If the buffer pointer is NULL, it is updated |
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231 | * with an appropriately allocated area. |
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232 | */ |
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233 | typedef struct strbuf { |
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234 | char *buf; |
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235 | u_int max; |
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236 | } strbuf; |
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237 | |
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238 | /* Read 'readlink' results into a 'strbuf'. |
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239 | * This is convenient as it avoids |
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240 | * one extra step of copying / lenght |
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241 | * checking. |
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242 | */ |
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243 | typedef struct readlinkres_strbuf { |
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244 | nfsstat status; |
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245 | strbuf strbuf; |
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246 | } readlinkres_strbuf; |
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247 | |
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248 | static bool_t |
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249 | xdr_readlinkres_strbuf(XDR *xdrs, readlinkres_strbuf *objp) |
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250 | { |
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251 | if ( !xdr_nfsstat(xdrs, &objp->status) ) |
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252 | return FALSE; |
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253 | |
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254 | if ( NFS_OK == objp->status ) { |
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255 | if ( !xdr_string(xdrs, &objp->strbuf.buf, objp->strbuf.max) ) |
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256 | return FALSE; |
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257 | } |
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258 | return TRUE; |
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259 | } |
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260 | |
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261 | |
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262 | /* DirInfoRec is used instead of dirresargs |
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263 | * to convert recursion into iteration. The |
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264 | * 'rpcgen'erated xdr_dirresargs ends up |
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265 | * doing nested calls when unpacking the |
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266 | * 'next' pointers. |
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267 | */ |
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268 | |
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269 | typedef struct DirInfoRec_ { |
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270 | readdirargs readdirargs; |
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271 | /* clone of the 'readdirres' fields; |
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272 | * the cookie is put into the readdirargs above |
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273 | */ |
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274 | nfsstat status; |
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275 | char *buf, *ptr; |
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276 | int len; |
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277 | bool_t eofreached; |
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278 | } DirInfoRec, *DirInfo; |
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279 | |
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280 | /* this deals with one entry / record */ |
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281 | static bool_t |
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282 | xdr_dir_info_entry(XDR *xdrs, DirInfo di) |
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283 | { |
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284 | union { |
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285 | char nambuf[NFS_MAXNAMLEN+1]; |
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286 | nfscookie cookie; |
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287 | } dummy; |
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288 | struct dirent *pde = (struct dirent *)di->ptr; |
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289 | u_int fileid; |
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290 | char *name; |
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291 | register int nlen = 0,len,naligned = 0; |
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292 | nfscookie *pcookie; |
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293 | |
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294 | len = di->len; |
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295 | |
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296 | if ( !xdr_u_int(xdrs, &fileid) ) |
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297 | return FALSE; |
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298 | |
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299 | /* we must pass the address of a char* */ |
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300 | name = (len > NFS_MAXNAMLEN) ? pde->d_name : dummy.nambuf; |
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301 | |
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302 | if ( !xdr_filename(xdrs, &name) ) { |
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303 | return FALSE; |
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304 | } |
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305 | |
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306 | if (len >= 0) { |
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307 | nlen = strlen(name); |
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308 | naligned = nlen + 1 /* string delimiter */ + 3 /* alignment */; |
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309 | naligned &= ~3; |
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310 | len -= naligned; |
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311 | } |
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312 | |
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313 | /* if the cookie goes into the DirInfo, we hope this doesn't fail |
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314 | * - the caller ends up with an invalid readdirargs cookie otherwise... |
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315 | */ |
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316 | pcookie = (len >= 0) ? &di->readdirargs.cookie : &dummy.cookie; |
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317 | if ( !xdr_nfscookie(xdrs, pcookie) ) { |
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318 | return FALSE; |
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319 | } |
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320 | |
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321 | di->len = len; |
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322 | /* adjust the buffer pointer */ |
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323 | if (len >= 0) { |
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324 | pde->d_ino = fileid; |
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325 | pde->d_namlen = nlen; |
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326 | pde->d_off = di->ptr - di->buf; |
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327 | if (name == dummy.nambuf) { |
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328 | memcpy(pde->d_name, dummy.nambuf, nlen + 1); |
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329 | } |
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330 | pde->d_reclen = DIRENT_HEADER_SIZE + naligned; |
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331 | di->ptr += pde->d_reclen; |
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332 | } |
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333 | |
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334 | return TRUE; |
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335 | } |
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336 | |
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337 | /* this routine loops over all entries */ |
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338 | static bool_t |
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339 | xdr_dir_info(XDR *xdrs, DirInfo di) |
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340 | { |
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341 | DirInfo dip; |
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342 | |
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343 | if ( !xdr_nfsstat(xdrs, &di->status) ) |
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344 | return FALSE; |
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345 | |
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346 | if ( NFS_OK != di->status ) |
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347 | return TRUE; |
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348 | |
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349 | dip = di; |
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350 | |
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351 | while (dip) { |
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352 | /* reserve space for the dirent 'header' - we assume it's word aligned! */ |
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353 | #ifdef DEBUG |
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354 | assert( DIRENT_HEADER_SIZE % 4 == 0 ); |
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355 | #endif |
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356 | dip->len -= DIRENT_HEADER_SIZE; |
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357 | |
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358 | /* we pass a 0 size - size is unused since |
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359 | * we always pass a non-NULL pointer |
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360 | */ |
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361 | if ( !xdr_pointer(xdrs, (void*)&dip, 0 /* size */, (xdrproc_t)xdr_dir_info_entry) ) |
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362 | return FALSE; |
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363 | } |
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364 | |
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365 | if ( ! xdr_bool(xdrs, &di->eofreached) ) |
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366 | return FALSE; |
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367 | |
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368 | /* if everything fits into the XDR buffer but not the user's buffer, |
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369 | * they must resume reading from where xdr_dir_info_entry() started |
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370 | * skipping and 'eofreached' needs to be adjusted |
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371 | */ |
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372 | if ( di->len < 0 && di->eofreached ) |
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373 | di->eofreached = FALSE; |
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374 | |
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375 | return TRUE; |
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376 | } |
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377 | |
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378 | |
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379 | /* a type better suited for node operations |
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380 | * than diropres. |
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381 | * fattr and fhs are swapped so parts of this |
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382 | * structure may be used as a diroparg which |
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383 | * is practical when looking up paths. |
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384 | */ |
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385 | |
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386 | /* Macro for accessing serporid fields |
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387 | */ |
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388 | #define SERP_ARGS(node) ((node)->serporid.serporid_u.serporid.arg_u) |
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389 | #define SERP_ATTR(node) ((node)->serporid.serporid_u.serporid.attributes) |
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390 | #define SERP_FILE(node) ((node)->serporid.serporid_u.serporid.file) |
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391 | |
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392 | |
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393 | typedef struct serporidok { |
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394 | fattr attributes; |
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395 | nfs_fh file; |
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396 | union { |
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397 | struct { |
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398 | filename name; |
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399 | } diroparg; |
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400 | struct { |
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401 | sattr attributes; |
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402 | } sattrarg; |
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403 | struct { |
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404 | uint32_t offset; |
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405 | uint32_t count; |
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406 | uint32_t totalcount; |
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407 | } readarg; |
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408 | struct { |
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409 | uint32_t beginoffset; |
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410 | uint32_t offset; |
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411 | uint32_t totalcount; |
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412 | struct { |
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413 | uint32_t data_len; |
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414 | char* data_val; |
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415 | } data; |
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416 | } writearg; |
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417 | struct { |
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418 | filename name; |
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419 | sattr attributes; |
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420 | } createarg; |
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421 | struct { |
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422 | filename name; |
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423 | diropargs to; |
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424 | } renamearg; |
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425 | struct { |
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426 | diropargs to; |
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427 | } linkarg; |
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428 | struct { |
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429 | filename name; |
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430 | nfspath to; |
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431 | sattr attributes; |
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432 | } symlinkarg; |
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433 | struct { |
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434 | nfscookie cookie; |
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435 | uint32_t count; |
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436 | } readdirarg; |
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437 | } arg_u; |
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438 | } serporidok; |
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439 | |
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440 | typedef struct serporid { |
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441 | nfsstat status; |
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442 | union { |
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443 | serporidok serporid; |
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444 | } serporid_u; |
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445 | } serporid; |
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446 | |
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447 | /* an XDR routine to encode/decode the inverted diropres |
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448 | * into an nfsnodestat; |
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449 | * |
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450 | * NOTE: this routine only acts on |
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451 | * - 'serporid.status' |
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452 | * - 'serporid.file' |
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453 | * - 'serporid.attributes' |
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454 | * and leaves the 'arg_u' alone. |
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455 | * |
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456 | * The idea is that a 'diropres' is read into 'serporid' |
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457 | * which can then be used as an argument to subsequent |
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458 | * NFS-RPCs (after filling in the node's arg_u). |
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459 | */ |
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460 | static bool_t |
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461 | xdr_serporidok(XDR *xdrs, serporidok *objp) |
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462 | { |
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463 | if (!xdr_nfs_fh (xdrs, &objp->file)) |
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464 | return FALSE; |
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465 | if (!xdr_fattr (xdrs, &objp->attributes)) |
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466 | return FALSE; |
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467 | return TRUE; |
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468 | } |
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469 | |
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470 | static bool_t |
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471 | xdr_serporid(XDR *xdrs, serporid *objp) |
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472 | { |
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473 | if (!xdr_nfsstat (xdrs, &objp->status)) |
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474 | return FALSE; |
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475 | switch (objp->status) { |
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476 | case NFS_OK: |
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477 | if (!xdr_serporidok(xdrs, &objp->serporid_u.serporid)) |
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478 | return FALSE; |
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479 | break; |
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480 | default: |
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481 | break; |
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482 | } |
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483 | return TRUE; |
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484 | } |
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485 | |
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486 | /***************************************** |
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487 | Data Structures and Types |
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488 | *****************************************/ |
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489 | |
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490 | /* 'time()' hack with less overhead; */ |
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491 | |
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492 | /* assume reading a long word is atomic */ |
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493 | #define READ_LONG_IS_ATOMIC |
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494 | |
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495 | typedef uint32_t TimeStamp; |
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496 | |
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497 | static inline TimeStamp |
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498 | nowSeconds(void) |
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499 | { |
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500 | rtems_interval rval; |
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501 | rtems_clock_get_seconds_since_epoch( &rval ); |
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502 | return rval; |
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503 | } |
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504 | |
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505 | |
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506 | /* Per mounted FS structure */ |
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507 | typedef struct NfsRec_ { |
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508 | /* the NFS server we're talking to. |
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509 | */ |
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510 | RpcUdpServer server; |
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511 | /* statistics; how many NfsNodes are |
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512 | * currently alive. |
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513 | */ |
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514 | volatile int nodesInUse; |
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515 | #if DEBUG & DEBUG_COUNT_NODES |
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516 | /* statistics; how many 'NfsNode.str' |
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517 | * strings are currently allocated. |
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518 | */ |
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519 | volatile int stringsInUse; |
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520 | #endif |
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521 | /* A small number who uniquely |
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522 | * identifies a mounted NFS within |
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523 | * this driver (i.e. this NfsRec). |
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524 | * Each time a NFS is mounted, the |
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525 | * global ID counter is incremented |
---|
526 | * and its value is assigned to the |
---|
527 | * newly created NfsRec. |
---|
528 | */ |
---|
529 | u_short id; |
---|
530 | /* Our RTEMS filesystem mt_entry |
---|
531 | */ |
---|
532 | rtems_filesystem_mount_table_entry_t *mt_entry; |
---|
533 | /* Next NfsRec on a linked list who |
---|
534 | * is anchored at nfsGlob |
---|
535 | */ |
---|
536 | struct NfsRec_ *next; |
---|
537 | /* Who we pretend we are |
---|
538 | */ |
---|
539 | u_long uid,gid; |
---|
540 | } NfsRec, *Nfs; |
---|
541 | |
---|
542 | typedef struct NfsNodeRec_ { |
---|
543 | /* This holds this node's attributes |
---|
544 | * (stats) and its nfs filehandle. |
---|
545 | * It also contains room for nfs rpc |
---|
546 | * arguments. |
---|
547 | */ |
---|
548 | serporid serporid; |
---|
549 | /* The arguments we used when doing |
---|
550 | * the 'lookup' call for this node. |
---|
551 | * We need this information (especially |
---|
552 | * the directory FH) for performing |
---|
553 | * certain operations on this |
---|
554 | * node (in particular: for unlinking |
---|
555 | * it from a parent directory) |
---|
556 | */ |
---|
557 | diropargs args; |
---|
558 | /* FS this node belongs to |
---|
559 | */ |
---|
560 | Nfs nfs; |
---|
561 | /* A buffer for the string the |
---|
562 | * args.name points to. |
---|
563 | * We need this because args.name might |
---|
564 | * temporarily point to strings on the |
---|
565 | * stack. Duplicates are allocated from |
---|
566 | * the heap and attached to 'str' so |
---|
567 | * they can be released as appropriate. |
---|
568 | */ |
---|
569 | char *str; |
---|
570 | /* A timestamp for the stats |
---|
571 | */ |
---|
572 | TimeStamp age; |
---|
573 | } NfsNodeRec, *NfsNode; |
---|
574 | |
---|
575 | /***************************************** |
---|
576 | Forward Declarations |
---|
577 | *****************************************/ |
---|
578 | |
---|
579 | static ssize_t nfs_readlink( |
---|
580 | const rtems_filesystem_location_info_t *loc, |
---|
581 | char *buf, |
---|
582 | size_t len |
---|
583 | ); |
---|
584 | |
---|
585 | static int updateAttr(NfsNode node, int force); |
---|
586 | |
---|
587 | /* Mask bits when setting attributes. |
---|
588 | * Only the 'arg' fields with their |
---|
589 | * corresponding bit set in the mask |
---|
590 | * will be used. The others are left |
---|
591 | * unchanged. |
---|
592 | * The 'TOUCH' bits instruct nfs_sattr() |
---|
593 | * to update the respective time |
---|
594 | * fields to the current time |
---|
595 | */ |
---|
596 | #define SATTR_MODE (1<<0) |
---|
597 | #define SATTR_UID (1<<1) |
---|
598 | #define SATTR_GID (1<<2) |
---|
599 | #define SATTR_SIZE (1<<3) |
---|
600 | #define SATTR_ATIME (1<<4) |
---|
601 | #define SATTR_TOUCHA (1<<5) |
---|
602 | #define SATTR_MTIME (1<<6) |
---|
603 | #define SATTR_TOUCHM (1<<7) |
---|
604 | #define SATTR_TOUCH (SATTR_TOUCHM | SATTR_TOUCHA) |
---|
605 | |
---|
606 | static int |
---|
607 | nfs_sattr(NfsNode node, sattr *arg, u_long mask); |
---|
608 | |
---|
609 | extern const struct _rtems_filesystem_operations_table nfs_fs_ops; |
---|
610 | static const struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers; |
---|
611 | static const struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers; |
---|
612 | static const struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers; |
---|
613 | static rtems_driver_address_table drvNfs; |
---|
614 | |
---|
615 | int |
---|
616 | nfsMountsShow(FILE*); |
---|
617 | |
---|
618 | rtems_status_code |
---|
619 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc); |
---|
620 | |
---|
621 | /***************************************** |
---|
622 | Global Variables |
---|
623 | *****************************************/ |
---|
624 | |
---|
625 | /* These are (except for MAXNAMLEN/MAXPATHLEN) copied from IMFS */ |
---|
626 | |
---|
627 | static rtems_filesystem_limits_and_options_t |
---|
628 | nfs_limits_and_options = { |
---|
629 | 5, /* link_max */ |
---|
630 | 6, /* max_canon */ |
---|
631 | 7, /* max_input */ |
---|
632 | NFS_MAXNAMLEN, /* name_max */ |
---|
633 | NFS_MAXPATHLEN, /* path_max */ |
---|
634 | 2, /* pipe_buf */ |
---|
635 | 1, /* posix_async_io */ |
---|
636 | 2, /* posix_chown_restrictions */ |
---|
637 | 3, /* posix_no_trunc */ |
---|
638 | 4, /* posix_prio_io */ |
---|
639 | 5, /* posix_sync_io */ |
---|
640 | 6 /* posix_vdisable */ |
---|
641 | }; |
---|
642 | |
---|
643 | /* size of an encoded 'entry' object */ |
---|
644 | static int dirres_entry_size; |
---|
645 | |
---|
646 | /* Global stuff and statistics */ |
---|
647 | static struct nfsstats { |
---|
648 | /* A lock for protecting the |
---|
649 | * linked ist of mounted NFS |
---|
650 | * and the num_mounted_fs field |
---|
651 | */ |
---|
652 | rtems_id llock; |
---|
653 | /* A lock for protecting misc |
---|
654 | * stuff within the driver. |
---|
655 | * The lock must only be held |
---|
656 | * for short periods of time. |
---|
657 | */ |
---|
658 | rtems_id lock; |
---|
659 | /* Our major number as assigned |
---|
660 | * by RTEMS |
---|
661 | */ |
---|
662 | rtems_device_major_number nfs_major; |
---|
663 | /* The number of currently |
---|
664 | * mounted NFS |
---|
665 | */ |
---|
666 | int num_mounted_fs; |
---|
667 | /* A list of the currently |
---|
668 | * mounted NFS |
---|
669 | */ |
---|
670 | struct NfsRec_ *mounted_fs; |
---|
671 | /* A counter for allocating |
---|
672 | * unique IDs to each mounted |
---|
673 | * NFS. |
---|
674 | * Assume we are not going to |
---|
675 | * do more than 16k mounts |
---|
676 | * during the system lifetime |
---|
677 | */ |
---|
678 | u_short fs_ids; |
---|
679 | } nfsGlob = {0, 0, 0, 0, 0, 0}; |
---|
680 | |
---|
681 | /* |
---|
682 | * Global variable to tune the 'st_blksize' (stat(2)) value this nfs |
---|
683 | * client should report. |
---|
684 | * size on the server. |
---|
685 | */ |
---|
686 | #ifndef DEFAULT_NFS_ST_BLKSIZE |
---|
687 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
---|
688 | #endif |
---|
689 | int nfsStBlksize = DEFAULT_NFS_ST_BLKSIZE; |
---|
690 | |
---|
691 | /* Two pools of RPC transactions; |
---|
692 | * One with small send buffers |
---|
693 | * the other with a big one. |
---|
694 | * The actual size of the small |
---|
695 | * buffer is configurable (see top). |
---|
696 | * |
---|
697 | * Note: The RX buffers are always |
---|
698 | * big |
---|
699 | */ |
---|
700 | static RpcUdpXactPool smallPool = 0; |
---|
701 | static RpcUdpXactPool bigPool = 0; |
---|
702 | |
---|
703 | |
---|
704 | /***************************************** |
---|
705 | Implementation |
---|
706 | *****************************************/ |
---|
707 | |
---|
708 | /* Create a Nfs object. This is |
---|
709 | * per-mounted NFS information. |
---|
710 | * |
---|
711 | * ARGS: The Nfs server handle. |
---|
712 | * |
---|
713 | * RETURNS: Nfs on success, |
---|
714 | * NULL on failure with |
---|
715 | * errno set |
---|
716 | * |
---|
717 | * NOTE: The submitted server |
---|
718 | * object is 'owned' by |
---|
719 | * this Nfs and will be |
---|
720 | * destroyed by nfsDestroy() |
---|
721 | */ |
---|
722 | static Nfs |
---|
723 | nfsCreate(RpcUdpServer server) |
---|
724 | { |
---|
725 | Nfs rval = calloc(1,sizeof(*rval)); |
---|
726 | |
---|
727 | if (rval) { |
---|
728 | rval->server = server; |
---|
729 | LOCK(nfsGlob.llock); |
---|
730 | rval->next = nfsGlob.mounted_fs; |
---|
731 | nfsGlob.mounted_fs = rval; |
---|
732 | UNLOCK(nfsGlob.llock); |
---|
733 | } else { |
---|
734 | errno = ENOMEM; |
---|
735 | } |
---|
736 | return rval; |
---|
737 | } |
---|
738 | |
---|
739 | /* Destroy an Nfs object and |
---|
740 | * its associated server |
---|
741 | */ |
---|
742 | static void |
---|
743 | nfsDestroy(Nfs nfs) |
---|
744 | { |
---|
745 | register Nfs prev; |
---|
746 | if (!nfs) |
---|
747 | return; |
---|
748 | |
---|
749 | LOCK(nfsGlob.llock); |
---|
750 | if (nfs == nfsGlob.mounted_fs) |
---|
751 | nfsGlob.mounted_fs = nfs->next; |
---|
752 | else { |
---|
753 | for (prev = nfsGlob.mounted_fs; |
---|
754 | prev && prev->next != nfs; |
---|
755 | prev = prev->next) |
---|
756 | /* nothing else to do */; |
---|
757 | assert( prev ); |
---|
758 | prev->next = nfs->next; |
---|
759 | } |
---|
760 | UNLOCK(nfsGlob.llock); |
---|
761 | |
---|
762 | nfs->next = 0; /* paranoia */ |
---|
763 | rpcUdpServerDestroy(nfs->server); |
---|
764 | free(nfs); |
---|
765 | } |
---|
766 | |
---|
767 | /* |
---|
768 | * Create a Node. The node will |
---|
769 | * be associated with a particular |
---|
770 | * mounted NFS identified by 'nfs' |
---|
771 | * Optionally, a NFS file handle |
---|
772 | * may be copied into this node. |
---|
773 | * |
---|
774 | * ARGS: nfs of the NFS this node |
---|
775 | * belongs to. |
---|
776 | * NFS file handle identifying |
---|
777 | * this node. |
---|
778 | * RETURNS: node on success, |
---|
779 | * NULL on failure with errno |
---|
780 | * set. |
---|
781 | * |
---|
782 | * NOTE: The caller of this routine |
---|
783 | * is responsible for copying |
---|
784 | * a NFS file handle if she |
---|
785 | * choses to pass a NULL fh. |
---|
786 | * |
---|
787 | * The driver code assumes the |
---|
788 | * a node always has a valid |
---|
789 | * NFS filehandle and file |
---|
790 | * attributes (unless the latter |
---|
791 | * are aged). |
---|
792 | */ |
---|
793 | static NfsNode |
---|
794 | nfsNodeCreate(Nfs nfs, fhandle *fh) |
---|
795 | { |
---|
796 | NfsNode rval = malloc(sizeof(*rval)); |
---|
797 | unsigned long flags; |
---|
798 | |
---|
799 | #if DEBUG & DEBUG_TRACK_NODES |
---|
800 | fprintf(stderr,"NFS: creating a node\n"); |
---|
801 | #endif |
---|
802 | |
---|
803 | if (rval) { |
---|
804 | if (fh) |
---|
805 | memcpy( &SERP_FILE(rval), fh, sizeof(*fh) ); |
---|
806 | rtems_interrupt_disable(flags); |
---|
807 | nfs->nodesInUse++; |
---|
808 | rtems_interrupt_enable(flags); |
---|
809 | rval->nfs = nfs; |
---|
810 | rval->str = 0; |
---|
811 | } else { |
---|
812 | errno = ENOMEM; |
---|
813 | } |
---|
814 | |
---|
815 | return rval; |
---|
816 | } |
---|
817 | |
---|
818 | /* destroy a node */ |
---|
819 | static void |
---|
820 | nfsNodeDestroy(NfsNode node) |
---|
821 | { |
---|
822 | unsigned long flags; |
---|
823 | |
---|
824 | #if DEBUG & DEBUG_TRACK_NODES |
---|
825 | fprintf(stderr,"NFS: destroying a node\n"); |
---|
826 | #endif |
---|
827 | #if 0 |
---|
828 | if (!node) |
---|
829 | return; |
---|
830 | /* this probably does nothing... */ |
---|
831 | xdr_free(xdr_serporid, &node->serporid); |
---|
832 | #endif |
---|
833 | |
---|
834 | rtems_interrupt_disable(flags); |
---|
835 | node->nfs->nodesInUse--; |
---|
836 | #if DEBUG & DEBUG_COUNT_NODES |
---|
837 | if (node->str) |
---|
838 | node->nfs->stringsInUse--; |
---|
839 | #endif |
---|
840 | rtems_interrupt_enable(flags); |
---|
841 | |
---|
842 | if (node->str) |
---|
843 | free(node->str); |
---|
844 | |
---|
845 | free(node); |
---|
846 | } |
---|
847 | |
---|
848 | /* Clone a given node (AKA copy constructor), |
---|
849 | * i.e. create an exact copy. |
---|
850 | * |
---|
851 | * ARGS: node to clone |
---|
852 | * RETURNS: new node on success |
---|
853 | * NULL on failure with errno set. |
---|
854 | * |
---|
855 | * NOTE: a string attached to 'str' |
---|
856 | * is cloned as well. Outdated |
---|
857 | * attributes (of the new copy |
---|
858 | * only) will be refreshed |
---|
859 | * (if unsuccessful, this could |
---|
860 | * be a reason for failure to |
---|
861 | * clone a node). |
---|
862 | */ |
---|
863 | static NfsNode |
---|
864 | nfsNodeClone(NfsNode node) |
---|
865 | { |
---|
866 | NfsNode rval = nfsNodeCreate(node->nfs, 0); |
---|
867 | |
---|
868 | if (rval) { |
---|
869 | *rval = *node; |
---|
870 | |
---|
871 | /* must clone the string also */ |
---|
872 | if (node->str) { |
---|
873 | rval->args.name = rval->str = strdup(node->str); |
---|
874 | if (!rval->str) { |
---|
875 | errno = ENOMEM; |
---|
876 | nfsNodeDestroy(rval); |
---|
877 | return 0; |
---|
878 | } |
---|
879 | #if DEBUG & DEBUG_COUNT_NODES |
---|
880 | { unsigned long flags; |
---|
881 | rtems_interrupt_disable(flags); |
---|
882 | node->nfs->stringsInUse++; |
---|
883 | rtems_interrupt_enable(flags); |
---|
884 | } |
---|
885 | #endif |
---|
886 | } |
---|
887 | |
---|
888 | /* possibly update the stats */ |
---|
889 | if (updateAttr(rval, 0 /* only if necessary */)) { |
---|
890 | nfsNodeDestroy(rval); |
---|
891 | return 0; |
---|
892 | } |
---|
893 | } |
---|
894 | return rval; |
---|
895 | } |
---|
896 | |
---|
897 | /* Initialize the driver. |
---|
898 | * |
---|
899 | * ARGS: depth of the small and big |
---|
900 | * transaction pools, i.e. how |
---|
901 | * many transactions (buffers) |
---|
902 | * should always be kept around. |
---|
903 | * |
---|
904 | * (If more transactions are needed, |
---|
905 | * they are created and destroyed |
---|
906 | * on the fly). |
---|
907 | */ |
---|
908 | void |
---|
909 | nfsInit(int smallPoolDepth, int bigPoolDepth) |
---|
910 | { |
---|
911 | static int initialised = 0; |
---|
912 | entry dummy; |
---|
913 | rtems_status_code status; |
---|
914 | |
---|
915 | if (initialised) |
---|
916 | return; |
---|
917 | |
---|
918 | initialised = 1; |
---|
919 | |
---|
920 | fprintf(stderr, |
---|
921 | "RTEMS-NFS $Release$, " \ |
---|
922 | "Till Straumann, Stanford/SLAC/SSRL 2002, " \ |
---|
923 | "See LICENSE file for licensing info.\n"); |
---|
924 | |
---|
925 | /* Get a major number */ |
---|
926 | |
---|
927 | if (RTEMS_SUCCESSFUL != rtems_io_register_driver(0, &drvNfs, &nfsGlob.nfs_major)) { |
---|
928 | fprintf(stderr,"Registering NFS driver failed - %s\n", strerror(errno)); |
---|
929 | return; |
---|
930 | } |
---|
931 | |
---|
932 | if (0==smallPoolDepth) |
---|
933 | smallPoolDepth = 20; |
---|
934 | if (0==bigPoolDepth) |
---|
935 | bigPoolDepth = 10; |
---|
936 | |
---|
937 | /* it's crucial to zero out the 'next' pointer |
---|
938 | * because it terminates the xdr_entry recursion |
---|
939 | * |
---|
940 | * we also must make the filename some non-zero |
---|
941 | * char pointer! |
---|
942 | */ |
---|
943 | |
---|
944 | memset(&dummy, 0, sizeof(dummy)); |
---|
945 | |
---|
946 | dummy.nextentry = 0; |
---|
947 | dummy.name = "somename"; /* guess average length of a filename */ |
---|
948 | dirres_entry_size = xdr_sizeof((xdrproc_t)xdr_entry, &dummy); |
---|
949 | |
---|
950 | smallPool = rpcUdpXactPoolCreate( |
---|
951 | NFS_PROGRAM, |
---|
952 | NFS_VERSION_2, |
---|
953 | CONFIG_NFS_SMALL_XACT_SIZE, |
---|
954 | smallPoolDepth); |
---|
955 | assert( smallPool ); |
---|
956 | |
---|
957 | bigPool = rpcUdpXactPoolCreate( |
---|
958 | NFS_PROGRAM, |
---|
959 | NFS_VERSION_2, |
---|
960 | CONFIG_NFS_BIG_XACT_SIZE, |
---|
961 | bigPoolDepth); |
---|
962 | assert( bigPool ); |
---|
963 | |
---|
964 | status = rtems_semaphore_create( |
---|
965 | rtems_build_name('N','F','S','l'), |
---|
966 | 1, |
---|
967 | MUTEX_ATTRIBUTES, |
---|
968 | 0, |
---|
969 | &nfsGlob.llock); |
---|
970 | assert( status == RTEMS_SUCCESSFUL ); |
---|
971 | status = rtems_semaphore_create( |
---|
972 | rtems_build_name('N','F','S','m'), |
---|
973 | 1, |
---|
974 | MUTEX_ATTRIBUTES, |
---|
975 | 0, |
---|
976 | &nfsGlob.lock); |
---|
977 | assert( status == RTEMS_SUCCESSFUL ); |
---|
978 | |
---|
979 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
980 | fprintf(stderr, |
---|
981 | "WARNING: Using 'short st_ino' hits performance and may fail to access/find correct files\n"); |
---|
982 | fprintf(stderr, |
---|
983 | "you should fix newlib's sys/stat.h - for now I'll enable a hack...\n"); |
---|
984 | |
---|
985 | } |
---|
986 | } |
---|
987 | |
---|
988 | /* Driver cleanup code |
---|
989 | */ |
---|
990 | int |
---|
991 | nfsCleanup(void) |
---|
992 | { |
---|
993 | rtems_id l; |
---|
994 | int refuse; |
---|
995 | |
---|
996 | if (!nfsGlob.llock) { |
---|
997 | /* registering the driver failed - let them still cleanup */ |
---|
998 | return 0; |
---|
999 | } |
---|
1000 | |
---|
1001 | LOCK(nfsGlob.llock); |
---|
1002 | if ( (refuse = nfsGlob.num_mounted_fs) ) { |
---|
1003 | fprintf(stderr,"Refuse to unload NFS; %i filesystems still mounted.\n", |
---|
1004 | refuse); |
---|
1005 | nfsMountsShow(stderr); |
---|
1006 | /* yes, printing is slow - but since you try to unload the driver, |
---|
1007 | * you assume nobody is using NFS, so what if they have to wait? |
---|
1008 | */ |
---|
1009 | UNLOCK(nfsGlob.llock); |
---|
1010 | return -1; |
---|
1011 | } |
---|
1012 | |
---|
1013 | rtems_semaphore_delete(nfsGlob.lock); |
---|
1014 | nfsGlob.lock = 0; |
---|
1015 | |
---|
1016 | /* hold the lock while cleaning up... */ |
---|
1017 | |
---|
1018 | rpcUdpXactPoolDestroy(smallPool); |
---|
1019 | rpcUdpXactPoolDestroy(bigPool); |
---|
1020 | l = nfsGlob.llock; |
---|
1021 | rtems_io_unregister_driver(nfsGlob.nfs_major); |
---|
1022 | |
---|
1023 | rtems_semaphore_delete(l); |
---|
1024 | nfsGlob.llock = 0; |
---|
1025 | return 0; |
---|
1026 | } |
---|
1027 | |
---|
1028 | /* NFS RPC wrapper. |
---|
1029 | * |
---|
1030 | * ARGS: srvr the NFS server we want to call |
---|
1031 | * proc the NFSPROC_xx we want to invoke |
---|
1032 | * xargs xdr routine to wrap the arguments |
---|
1033 | * pargs pointer to the argument object |
---|
1034 | * xres xdr routine to unwrap the results |
---|
1035 | * pres pointer to the result object |
---|
1036 | * |
---|
1037 | * RETURNS: 0 on success, -1 on error with errno set. |
---|
1038 | * |
---|
1039 | * NOTE: the caller assumes that errno is set to |
---|
1040 | * a nonzero value if this routine returns |
---|
1041 | * an error (nonzero return value). |
---|
1042 | * |
---|
1043 | * This routine prints RPC error messages to |
---|
1044 | * stderr. |
---|
1045 | */ |
---|
1046 | STATIC int |
---|
1047 | nfscall( |
---|
1048 | RpcUdpServer srvr, |
---|
1049 | int proc, |
---|
1050 | xdrproc_t xargs, |
---|
1051 | void * pargs, |
---|
1052 | xdrproc_t xres, |
---|
1053 | void * pres) |
---|
1054 | { |
---|
1055 | RpcUdpXact xact; |
---|
1056 | enum clnt_stat stat; |
---|
1057 | RpcUdpXactPool pool; |
---|
1058 | int rval = -1; |
---|
1059 | |
---|
1060 | |
---|
1061 | switch (proc) { |
---|
1062 | case NFSPROC_SYMLINK: |
---|
1063 | case NFSPROC_WRITE: |
---|
1064 | pool = bigPool; break; |
---|
1065 | default: pool = smallPool; break; |
---|
1066 | } |
---|
1067 | |
---|
1068 | xact = rpcUdpXactPoolGet(pool, XactGetCreate); |
---|
1069 | |
---|
1070 | if ( !xact ) { |
---|
1071 | errno = ENOMEM; |
---|
1072 | return -1; |
---|
1073 | } |
---|
1074 | |
---|
1075 | if ( RPC_SUCCESS != (stat=rpcUdpSend( |
---|
1076 | xact, |
---|
1077 | srvr, |
---|
1078 | NFSCALL_TIMEOUT, |
---|
1079 | proc, |
---|
1080 | xres, |
---|
1081 | pres, |
---|
1082 | xargs, |
---|
1083 | pargs, |
---|
1084 | 0)) || |
---|
1085 | RPC_SUCCESS != (stat=rpcUdpRcv(xact)) ) { |
---|
1086 | |
---|
1087 | fprintf(stderr, |
---|
1088 | "NFS (proc %i) - %s\n", |
---|
1089 | proc, |
---|
1090 | clnt_sperrno(stat)); |
---|
1091 | |
---|
1092 | switch (stat) { |
---|
1093 | /* TODO: this is probably not complete and/or fully accurate */ |
---|
1094 | case RPC_CANTENCODEARGS : errno = EINVAL; break; |
---|
1095 | case RPC_AUTHERROR : errno = EPERM; break; |
---|
1096 | |
---|
1097 | case RPC_CANTSEND : |
---|
1098 | case RPC_CANTRECV : /* hope they have errno set */ |
---|
1099 | case RPC_SYSTEMERROR : break; |
---|
1100 | |
---|
1101 | default : errno = EIO; break; |
---|
1102 | } |
---|
1103 | } else { |
---|
1104 | rval = 0; |
---|
1105 | } |
---|
1106 | |
---|
1107 | /* release the transaction back into the pool */ |
---|
1108 | rpcUdpXactPoolPut(xact); |
---|
1109 | |
---|
1110 | if (rval && !errno) |
---|
1111 | errno = EIO; |
---|
1112 | |
---|
1113 | return rval; |
---|
1114 | } |
---|
1115 | |
---|
1116 | /* Check the 'age' of a node's stats |
---|
1117 | * and read the attributes from the server |
---|
1118 | * if necessary. |
---|
1119 | * |
---|
1120 | * ARGS: node node to update |
---|
1121 | * force enforce updating ignoring |
---|
1122 | * the timestamp/age |
---|
1123 | * |
---|
1124 | * RETURNS: 0 on success, |
---|
1125 | * -1 on failure with errno set |
---|
1126 | */ |
---|
1127 | |
---|
1128 | static int |
---|
1129 | updateAttr(NfsNode node, int force) |
---|
1130 | { |
---|
1131 | |
---|
1132 | if (force |
---|
1133 | #ifdef CONFIG_ATTR_LIFETIME |
---|
1134 | || (nowSeconds() - node->age > CONFIG_ATTR_LIFETIME) |
---|
1135 | #endif |
---|
1136 | ) { |
---|
1137 | if ( nfscall(node->nfs->server, |
---|
1138 | NFSPROC_GETATTR, |
---|
1139 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
1140 | (xdrproc_t)xdr_attrstat, &node->serporid) ) |
---|
1141 | return -1; |
---|
1142 | |
---|
1143 | if ( NFS_OK != node->serporid.status ) { |
---|
1144 | errno = node->serporid.status; |
---|
1145 | return -1; |
---|
1146 | } |
---|
1147 | |
---|
1148 | node->age = nowSeconds(); |
---|
1149 | } |
---|
1150 | |
---|
1151 | return 0; |
---|
1152 | } |
---|
1153 | |
---|
1154 | /* |
---|
1155 | * IP address helper. |
---|
1156 | * |
---|
1157 | * initialize a sockaddr_in from a |
---|
1158 | * [<uid>'.'<gid>'@']<host>':'<path>" string and let |
---|
1159 | * pPath point to the <path> part; retrieve the optional |
---|
1160 | * uid/gids |
---|
1161 | * |
---|
1162 | * ARGS: see description above |
---|
1163 | * |
---|
1164 | * RETURNS: 0 on success, |
---|
1165 | * -1 on failure with errno set |
---|
1166 | */ |
---|
1167 | static int |
---|
1168 | buildIpAddr(u_long *puid, u_long *pgid, |
---|
1169 | char **pHost, struct sockaddr_in *psa, |
---|
1170 | char **pPath) |
---|
1171 | { |
---|
1172 | struct hostent *h; |
---|
1173 | char host[64]; |
---|
1174 | char *chpt = *pPath; |
---|
1175 | char *path; |
---|
1176 | int len; |
---|
1177 | |
---|
1178 | if ( !chpt ) { |
---|
1179 | errno = EINVAL; |
---|
1180 | return -1; |
---|
1181 | } |
---|
1182 | |
---|
1183 | /* look for the optional uid/gid */ |
---|
1184 | if ( (chpt = strchr(chpt, UIDSEP)) ) { |
---|
1185 | if ( 2 != sscanf(*pPath,"%li.%li",puid,pgid) ) { |
---|
1186 | errno = EINVAL; |
---|
1187 | return -1; |
---|
1188 | } |
---|
1189 | chpt++; |
---|
1190 | } else { |
---|
1191 | *puid = geteuid(); |
---|
1192 | *pgid = getegid(); |
---|
1193 | chpt = *pPath; |
---|
1194 | } |
---|
1195 | if ( pHost ) |
---|
1196 | *pHost = chpt; |
---|
1197 | |
---|
1198 | /* split the device name which is in the form |
---|
1199 | * |
---|
1200 | * <host> ':' <path> |
---|
1201 | * |
---|
1202 | * into its components using a local buffer |
---|
1203 | */ |
---|
1204 | |
---|
1205 | if ( !(path = strchr(chpt, HOSTDELIM)) || |
---|
1206 | (len = path - chpt) >= sizeof(host) - 1 ) { |
---|
1207 | errno = EINVAL; |
---|
1208 | return -1; |
---|
1209 | } |
---|
1210 | /* point to path beyond ':' */ |
---|
1211 | path++; |
---|
1212 | |
---|
1213 | strncpy(host, chpt, len); |
---|
1214 | host[len]=0; |
---|
1215 | |
---|
1216 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
1217 | |
---|
1218 | h = gethostbyname(host); |
---|
1219 | |
---|
1220 | if ( !h ) { |
---|
1221 | errno = EINVAL; |
---|
1222 | return -1; |
---|
1223 | } |
---|
1224 | |
---|
1225 | memcpy(&psa->sin_addr, h->h_addr, sizeof (struct in_addr)); |
---|
1226 | |
---|
1227 | /* END OF NON-THREAD SAFE REGION */ |
---|
1228 | |
---|
1229 | psa->sin_family = AF_INET; |
---|
1230 | psa->sin_port = 0; |
---|
1231 | *pPath = path; |
---|
1232 | return 0; |
---|
1233 | } |
---|
1234 | |
---|
1235 | /* wrapper similar to nfscall. |
---|
1236 | * However, since it is not used |
---|
1237 | * very often, the simpler and less |
---|
1238 | * efficient rpcUdpCallRp API is used. |
---|
1239 | * |
---|
1240 | * ARGS: see 'nfscall()' above |
---|
1241 | * |
---|
1242 | * RETURNS: RPC status |
---|
1243 | */ |
---|
1244 | static enum clnt_stat |
---|
1245 | mntcall( |
---|
1246 | struct sockaddr_in *psrvr, |
---|
1247 | int proc, |
---|
1248 | xdrproc_t xargs, |
---|
1249 | void * pargs, |
---|
1250 | xdrproc_t xres, |
---|
1251 | void * pres, |
---|
1252 | u_long uid, |
---|
1253 | u_long gid) |
---|
1254 | { |
---|
1255 | #ifdef MOUNT_V1_PORT |
---|
1256 | int retry; |
---|
1257 | #endif |
---|
1258 | enum clnt_stat stat = RPC_FAILED; |
---|
1259 | |
---|
1260 | #ifdef MOUNT_V1_PORT |
---|
1261 | /* if the portmapper fails, retry a fixed port */ |
---|
1262 | for (retry = 1, psrvr->sin_port = 0, stat = RPC_FAILED; |
---|
1263 | retry >= 0 && stat; |
---|
1264 | stat && (psrvr->sin_port = htons(MOUNT_V1_PORT)), retry-- ) |
---|
1265 | #endif |
---|
1266 | stat = rpcUdpCallRp( |
---|
1267 | psrvr, |
---|
1268 | MOUNTPROG, |
---|
1269 | MOUNTVERS, |
---|
1270 | proc, |
---|
1271 | xargs, |
---|
1272 | pargs, |
---|
1273 | xres, |
---|
1274 | pres, |
---|
1275 | uid, |
---|
1276 | gid, |
---|
1277 | MNTCALL_TIMEOUT |
---|
1278 | ); |
---|
1279 | return stat; |
---|
1280 | } |
---|
1281 | |
---|
1282 | /***************************************** |
---|
1283 | RTEMS File System Operations for NFS |
---|
1284 | *****************************************/ |
---|
1285 | |
---|
1286 | static bool nfs_is_directory( |
---|
1287 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1288 | void *arg |
---|
1289 | ) |
---|
1290 | { |
---|
1291 | bool is_dir = false; |
---|
1292 | rtems_filesystem_location_info_t *currentloc = |
---|
1293 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1294 | NfsNode node = currentloc->node_access; |
---|
1295 | int force_update = 0; |
---|
1296 | |
---|
1297 | if (updateAttr(node, force_update) == 0) { |
---|
1298 | is_dir = SERP_ATTR(node).type == NFDIR; |
---|
1299 | } |
---|
1300 | |
---|
1301 | return is_dir; |
---|
1302 | } |
---|
1303 | |
---|
1304 | static NfsNode nfs_search_in_directory( |
---|
1305 | Nfs nfs, |
---|
1306 | NfsNode node, |
---|
1307 | char *part |
---|
1308 | ) |
---|
1309 | { |
---|
1310 | int rv; |
---|
1311 | |
---|
1312 | /* lookup one element */ |
---|
1313 | SERP_ARGS(node).diroparg.name = part; |
---|
1314 | |
---|
1315 | /* remember args / directory fh */ |
---|
1316 | memcpy( &node->args, &SERP_FILE(node), sizeof(node->args)); |
---|
1317 | |
---|
1318 | #if DEBUG & DEBUG_EVALPATH |
---|
1319 | fprintf(stderr,"Looking up '%s'\n",part); |
---|
1320 | #endif |
---|
1321 | |
---|
1322 | rv = nfscall( |
---|
1323 | nfs->server, |
---|
1324 | NFSPROC_LOOKUP, |
---|
1325 | (xdrproc_t) xdr_diropargs, &SERP_FILE(node), |
---|
1326 | (xdrproc_t) xdr_serporid, &node->serporid |
---|
1327 | ); |
---|
1328 | |
---|
1329 | if (rv == 0 && node->serporid.status == NFS_OK) { |
---|
1330 | int force_update = 1; |
---|
1331 | |
---|
1332 | rv = updateAttr(node, force_update); |
---|
1333 | if (rv != 0) { |
---|
1334 | node = NULL; |
---|
1335 | } |
---|
1336 | } else { |
---|
1337 | node = NULL; |
---|
1338 | } |
---|
1339 | |
---|
1340 | return node; |
---|
1341 | } |
---|
1342 | |
---|
1343 | static void nfs_follow_link(rtems_filesystem_eval_path_context_t *ctx) |
---|
1344 | { |
---|
1345 | const size_t len = NFS_MAXPATHLEN + 1; |
---|
1346 | char *link = malloc(len); |
---|
1347 | |
---|
1348 | if (link != NULL) { |
---|
1349 | rtems_filesystem_location_info_t *currentloc = |
---|
1350 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1351 | ssize_t rv = nfs_readlink(currentloc, link, len); |
---|
1352 | |
---|
1353 | if (rv >= 0) { |
---|
1354 | rtems_filesystem_eval_path_recursive(ctx, link, (size_t) rv); |
---|
1355 | } else { |
---|
1356 | rtems_filesystem_eval_path_error(ctx, 0); |
---|
1357 | } |
---|
1358 | |
---|
1359 | free(link); |
---|
1360 | } else { |
---|
1361 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1362 | } |
---|
1363 | } |
---|
1364 | |
---|
1365 | static bool nfs_update_currentloc( |
---|
1366 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1367 | Nfs nfs, |
---|
1368 | NfsNode node |
---|
1369 | ) |
---|
1370 | { |
---|
1371 | bool ok = true; |
---|
1372 | rtems_filesystem_location_info_t *pathloc = |
---|
1373 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1374 | |
---|
1375 | pathloc->node_access = node; |
---|
1376 | |
---|
1377 | switch (SERP_ATTR(node).type) { |
---|
1378 | case NFDIR: pathloc->handlers = &nfs_dir_file_handlers; break; |
---|
1379 | case NFREG: pathloc->handlers = &nfs_file_file_handlers; break; |
---|
1380 | case NFLNK: pathloc->handlers = &nfs_link_file_handlers; break; |
---|
1381 | default: pathloc->handlers = &rtems_filesystem_handlers_default; break; |
---|
1382 | } |
---|
1383 | |
---|
1384 | /* remember the name of this directory entry */ |
---|
1385 | |
---|
1386 | if (node->args.name) { |
---|
1387 | if (node->str) { |
---|
1388 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1389 | rtems_interrupt_level flags; |
---|
1390 | rtems_interrupt_disable(flags); |
---|
1391 | nfs->stringsInUse--; |
---|
1392 | rtems_interrupt_enable(flags); |
---|
1393 | #endif |
---|
1394 | free(node->str); |
---|
1395 | } |
---|
1396 | node->args.name = node->str = strdup(node->args.name); |
---|
1397 | if (node->str != NULL) { |
---|
1398 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1399 | rtems_interrupt_level flags; |
---|
1400 | rtems_interrupt_disable(flags); |
---|
1401 | nfs->stringsInUse++; |
---|
1402 | rtems_interrupt_enable(flags); |
---|
1403 | #endif |
---|
1404 | } else { |
---|
1405 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1406 | ok = false; |
---|
1407 | } |
---|
1408 | } |
---|
1409 | |
---|
1410 | return ok; |
---|
1411 | } |
---|
1412 | |
---|
1413 | static rtems_filesystem_eval_path_generic_status nfs_eval_part( |
---|
1414 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1415 | char *part |
---|
1416 | ) |
---|
1417 | { |
---|
1418 | rtems_filesystem_eval_path_generic_status status = |
---|
1419 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
---|
1420 | rtems_filesystem_location_info_t *currentloc = |
---|
1421 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1422 | Nfs nfs = currentloc->mt_entry->fs_info; |
---|
1423 | NfsNode dir = currentloc->node_access; |
---|
1424 | NfsNode entry = nfs_search_in_directory(nfs, dir, part); |
---|
1425 | |
---|
1426 | if (entry != NULL) { |
---|
1427 | rtems_filesystem_eval_path_clear_token(ctx); |
---|
1428 | |
---|
1429 | if (nfs_update_currentloc(ctx, nfs, entry)) { |
---|
1430 | int eval_flags = rtems_filesystem_eval_path_get_flags(ctx); |
---|
1431 | bool follow_sym_link = (eval_flags & RTEMS_FS_FOLLOW_SYM_LINK) != 0; |
---|
1432 | bool terminal = !rtems_filesystem_eval_path_has_path( ctx ); |
---|
1433 | |
---|
1434 | if (SERP_ATTR(entry).type == NFLNK && (follow_sym_link || !terminal)) { |
---|
1435 | nfs_follow_link(ctx); |
---|
1436 | } else if (!terminal) { |
---|
1437 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
---|
1438 | } |
---|
1439 | } |
---|
1440 | } else { |
---|
1441 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY; |
---|
1442 | } |
---|
1443 | |
---|
1444 | return status; |
---|
1445 | } |
---|
1446 | |
---|
1447 | static rtems_filesystem_eval_path_generic_status nfs_eval_token( |
---|
1448 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1449 | void *arg, |
---|
1450 | const char *token, |
---|
1451 | size_t tokenlen |
---|
1452 | ) |
---|
1453 | { |
---|
1454 | rtems_filesystem_eval_path_generic_status status = |
---|
1455 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
---|
1456 | |
---|
1457 | if (rtems_filesystem_is_current_directory(token, tokenlen)) { |
---|
1458 | rtems_filesystem_eval_path_clear_token(ctx); |
---|
1459 | if (rtems_filesystem_eval_path_has_path(ctx)) { |
---|
1460 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
---|
1461 | } |
---|
1462 | } else { |
---|
1463 | char *part = nfs_dupname(token, tokenlen); |
---|
1464 | |
---|
1465 | if (part != NULL) { |
---|
1466 | status = nfs_eval_part(ctx, part); |
---|
1467 | free(part); |
---|
1468 | } else { |
---|
1469 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1470 | } |
---|
1471 | } |
---|
1472 | |
---|
1473 | return status; |
---|
1474 | } |
---|
1475 | |
---|
1476 | static const rtems_filesystem_eval_path_generic_config nfs_eval_config = { |
---|
1477 | .is_directory = nfs_is_directory, |
---|
1478 | .eval_token = nfs_eval_token |
---|
1479 | }; |
---|
1480 | |
---|
1481 | static void nfs_eval_path(rtems_filesystem_eval_path_context_t *ctx) |
---|
1482 | { |
---|
1483 | rtems_filesystem_eval_path_generic(ctx, NULL, &nfs_eval_config); |
---|
1484 | } |
---|
1485 | |
---|
1486 | /* create a hard link */ |
---|
1487 | |
---|
1488 | static int nfs_link( |
---|
1489 | const rtems_filesystem_location_info_t *parentloc, |
---|
1490 | const rtems_filesystem_location_info_t *targetloc, |
---|
1491 | const char *name, |
---|
1492 | size_t namelen |
---|
1493 | ) |
---|
1494 | { |
---|
1495 | int rv = 0; |
---|
1496 | NfsNode pNode = parentloc->node_access; |
---|
1497 | nfsstat status; |
---|
1498 | NfsNode tNode = targetloc->node_access; |
---|
1499 | char *dupname; |
---|
1500 | |
---|
1501 | dupname = nfs_dupname(name, namelen); |
---|
1502 | if (dupname == NULL) |
---|
1503 | return -1; |
---|
1504 | |
---|
1505 | #if DEBUG & DEBUG_SYSCALLS |
---|
1506 | fprintf(stderr,"Creating link '%s'\n",dupname); |
---|
1507 | #endif |
---|
1508 | |
---|
1509 | memcpy(&SERP_ARGS(tNode).linkarg.to.dir, |
---|
1510 | &SERP_FILE(pNode), |
---|
1511 | sizeof(SERP_FILE(pNode))); |
---|
1512 | |
---|
1513 | SERP_ARGS(tNode).linkarg.to.name = dupname; |
---|
1514 | |
---|
1515 | if ( nfscall(tNode->nfs->server, |
---|
1516 | NFSPROC_LINK, |
---|
1517 | (xdrproc_t)xdr_linkargs, &SERP_FILE(tNode), |
---|
1518 | (xdrproc_t)xdr_nfsstat, &status) |
---|
1519 | || (NFS_OK != (errno = status)) |
---|
1520 | ) { |
---|
1521 | #if DEBUG & DEBUG_SYSCALLS |
---|
1522 | perror("nfs_link"); |
---|
1523 | #endif |
---|
1524 | rv = -1; |
---|
1525 | } |
---|
1526 | |
---|
1527 | free(dupname); |
---|
1528 | |
---|
1529 | return rv; |
---|
1530 | |
---|
1531 | } |
---|
1532 | |
---|
1533 | static int nfs_do_unlink( |
---|
1534 | const rtems_filesystem_location_info_t *parentloc, |
---|
1535 | const rtems_filesystem_location_info_t *loc, |
---|
1536 | int proc |
---|
1537 | ) |
---|
1538 | { |
---|
1539 | nfsstat status; |
---|
1540 | NfsNode node = loc->node_access; |
---|
1541 | Nfs nfs = node->nfs; |
---|
1542 | #if DEBUG & DEBUG_SYSCALLS |
---|
1543 | char *name = NFSPROC_REMOVE == proc ? |
---|
1544 | "nfs_unlink" : "nfs_rmdir"; |
---|
1545 | #endif |
---|
1546 | |
---|
1547 | /* The FS generics have determined that pathloc is _not_ |
---|
1548 | * a directory. Hence we may assume that the parent |
---|
1549 | * is in our NFS. |
---|
1550 | */ |
---|
1551 | |
---|
1552 | #if DEBUG & DEBUG_SYSCALLS |
---|
1553 | assert( node->args.name == node->str && node->str ); |
---|
1554 | |
---|
1555 | fprintf(stderr,"%s '%s'\n", name, node->args.name); |
---|
1556 | #endif |
---|
1557 | |
---|
1558 | if ( nfscall(nfs->server, |
---|
1559 | proc, |
---|
1560 | (xdrproc_t)xdr_diropargs, &node->args, |
---|
1561 | (xdrproc_t)xdr_nfsstat, &status) |
---|
1562 | || (NFS_OK != (errno = status)) |
---|
1563 | ) { |
---|
1564 | #if DEBUG & DEBUG_SYSCALLS |
---|
1565 | perror(name); |
---|
1566 | #endif |
---|
1567 | return -1; |
---|
1568 | } |
---|
1569 | |
---|
1570 | return 0; |
---|
1571 | } |
---|
1572 | |
---|
1573 | static int nfs_chown( |
---|
1574 | const rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
1575 | uid_t owner, /* IN */ |
---|
1576 | gid_t group /* IN */ |
---|
1577 | ) |
---|
1578 | { |
---|
1579 | sattr arg; |
---|
1580 | |
---|
1581 | arg.uid = owner; |
---|
1582 | arg.gid = group; |
---|
1583 | |
---|
1584 | return nfs_sattr(pathloc->node_access, &arg, SATTR_UID | SATTR_GID); |
---|
1585 | |
---|
1586 | } |
---|
1587 | |
---|
1588 | static int nfs_clonenode(rtems_filesystem_location_info_t *loc) |
---|
1589 | { |
---|
1590 | NfsNode node = loc->node_access; |
---|
1591 | |
---|
1592 | LOCK(nfsGlob.lock); |
---|
1593 | node = nfsNodeClone(node); |
---|
1594 | UNLOCK(nfsGlob.lock); |
---|
1595 | |
---|
1596 | loc->node_access = node; |
---|
1597 | |
---|
1598 | return node != NULL ? 0 : -1; |
---|
1599 | } |
---|
1600 | |
---|
1601 | /* Cleanup the FS private info attached to pathloc->node_access */ |
---|
1602 | static void nfs_freenode( |
---|
1603 | const rtems_filesystem_location_info_t *pathloc /* IN */ |
---|
1604 | ) |
---|
1605 | { |
---|
1606 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1607 | Nfs nfs = ((NfsNode)pathloc->node_access)->nfs; |
---|
1608 | |
---|
1609 | /* print counts at entry where they are > 0 so 'nfs' is safe from being destroyed |
---|
1610 | * and there's no race condition |
---|
1611 | */ |
---|
1612 | fprintf(stderr, |
---|
1613 | "entering freenode, in use count is %i nodes, %i strings\n", |
---|
1614 | nfs->nodesInUse, |
---|
1615 | nfs->stringsInUse); |
---|
1616 | #endif |
---|
1617 | |
---|
1618 | nfsNodeDestroy(pathloc->node_access); |
---|
1619 | } |
---|
1620 | |
---|
1621 | /* NOTE/TODO: mounting on top of NFS is not currently supported |
---|
1622 | * |
---|
1623 | * Challenge: stateless protocol. It would be possible to |
---|
1624 | * delete mount points on the server. We would need some sort |
---|
1625 | * of a 'garbage collector' looking for dead/unreachable |
---|
1626 | * mount points and unmounting them. |
---|
1627 | * Also, the path evaluation routine would have to check |
---|
1628 | * for crossing mount points. Crossing over from one NFS |
---|
1629 | * into another NFS could probably handled iteratively |
---|
1630 | * rather than by recursion. |
---|
1631 | */ |
---|
1632 | |
---|
1633 | int rtems_nfs_initialize( |
---|
1634 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
1635 | const void *data |
---|
1636 | ) |
---|
1637 | { |
---|
1638 | char *host; |
---|
1639 | struct sockaddr_in saddr; |
---|
1640 | enum clnt_stat stat; |
---|
1641 | fhstatus fhstat; |
---|
1642 | u_long uid,gid; |
---|
1643 | #ifdef NFS_V2_PORT |
---|
1644 | int retry; |
---|
1645 | #endif |
---|
1646 | Nfs nfs = 0; |
---|
1647 | NfsNode rootNode = 0; |
---|
1648 | RpcUdpServer nfsServer = 0; |
---|
1649 | int e = -1; |
---|
1650 | char *path = mt_entry->dev; |
---|
1651 | |
---|
1652 | if (rpcUdpInit () < 0) { |
---|
1653 | fprintf (stderr, "error: initialising RPC\n"); |
---|
1654 | return -1; |
---|
1655 | } |
---|
1656 | |
---|
1657 | nfsInit(0, 0); |
---|
1658 | |
---|
1659 | #if 0 |
---|
1660 | printf("Trying to mount %s on %s\n",path,mntpoint); |
---|
1661 | #endif |
---|
1662 | |
---|
1663 | if ( buildIpAddr(&uid, &gid, &host, &saddr, &path) ) |
---|
1664 | return -1; |
---|
1665 | |
---|
1666 | #ifdef NFS_V2_PORT |
---|
1667 | /* if the portmapper fails, retry a fixed port */ |
---|
1668 | for (retry = 1, saddr.sin_port = 0, stat = RPC_FAILED; |
---|
1669 | retry >= 0 && stat; |
---|
1670 | stat && (saddr.sin_port = htons(NFS_V2_PORT)), retry-- ) |
---|
1671 | #endif |
---|
1672 | stat = rpcUdpServerCreate( |
---|
1673 | &saddr, |
---|
1674 | NFS_PROGRAM, |
---|
1675 | NFS_VERSION_2, |
---|
1676 | uid, |
---|
1677 | gid, |
---|
1678 | &nfsServer |
---|
1679 | ); |
---|
1680 | |
---|
1681 | if ( RPC_SUCCESS != stat ) { |
---|
1682 | fprintf(stderr, |
---|
1683 | "Unable to contact NFS server - invalid port? (%s)\n", |
---|
1684 | clnt_sperrno(stat)); |
---|
1685 | e = EPROTONOSUPPORT; |
---|
1686 | goto cleanup; |
---|
1687 | } |
---|
1688 | |
---|
1689 | |
---|
1690 | /* first, try to ping the NFS server by |
---|
1691 | * calling the NULL proc. |
---|
1692 | */ |
---|
1693 | if ( nfscall(nfsServer, |
---|
1694 | NFSPROC_NULL, |
---|
1695 | (xdrproc_t)xdr_void, 0, |
---|
1696 | (xdrproc_t)xdr_void, 0) ) { |
---|
1697 | |
---|
1698 | fputs("NFS Ping ",stderr); |
---|
1699 | fwrite(host, 1, path-host-1, stderr); |
---|
1700 | fprintf(stderr," failed: %s\n", strerror(errno)); |
---|
1701 | |
---|
1702 | e = errno ? errno : EIO; |
---|
1703 | goto cleanup; |
---|
1704 | } |
---|
1705 | |
---|
1706 | /* that seemed to work - we now try the |
---|
1707 | * actual mount |
---|
1708 | */ |
---|
1709 | |
---|
1710 | /* reuse server address but let the mntcall() |
---|
1711 | * search for the mountd's port |
---|
1712 | */ |
---|
1713 | saddr.sin_port = 0; |
---|
1714 | |
---|
1715 | stat = mntcall( &saddr, |
---|
1716 | MOUNTPROC_MNT, |
---|
1717 | (xdrproc_t)xdr_dirpath, |
---|
1718 | &path, |
---|
1719 | (xdrproc_t)xdr_fhstatus, |
---|
1720 | &fhstat, |
---|
1721 | uid, |
---|
1722 | gid ); |
---|
1723 | |
---|
1724 | if (stat) { |
---|
1725 | fprintf(stderr,"MOUNT -- %s\n",clnt_sperrno(stat)); |
---|
1726 | if ( e<=0 ) |
---|
1727 | e = EIO; |
---|
1728 | goto cleanup; |
---|
1729 | } else if (NFS_OK != (e=fhstat.fhs_status)) { |
---|
1730 | fprintf(stderr,"MOUNT: %s\n",strerror(e)); |
---|
1731 | goto cleanup; |
---|
1732 | } |
---|
1733 | |
---|
1734 | nfs = nfsCreate(nfsServer); |
---|
1735 | assert( nfs ); |
---|
1736 | nfsServer = 0; |
---|
1737 | |
---|
1738 | nfs->uid = uid; |
---|
1739 | nfs->gid = gid; |
---|
1740 | |
---|
1741 | /* that seemed to work - we now create the root node |
---|
1742 | * and we also must obtain the root node attributes |
---|
1743 | */ |
---|
1744 | rootNode = nfsNodeCreate(nfs, &fhstat.fhstatus_u.fhs_fhandle); |
---|
1745 | assert( rootNode ); |
---|
1746 | |
---|
1747 | if ( updateAttr(rootNode, 1 /* force */) ) { |
---|
1748 | e = errno; |
---|
1749 | goto cleanup; |
---|
1750 | } |
---|
1751 | |
---|
1752 | /* looks good so far */ |
---|
1753 | |
---|
1754 | mt_entry->mt_fs_root->location.node_access = rootNode; |
---|
1755 | |
---|
1756 | rootNode = 0; |
---|
1757 | |
---|
1758 | mt_entry->mt_fs_root->location.ops = &nfs_fs_ops; |
---|
1759 | mt_entry->mt_fs_root->location.handlers = &nfs_dir_file_handlers; |
---|
1760 | mt_entry->pathconf_limits_and_options = nfs_limits_and_options; |
---|
1761 | |
---|
1762 | LOCK(nfsGlob.llock); |
---|
1763 | nfsGlob.num_mounted_fs++; |
---|
1764 | /* allocate a new ID for this FS */ |
---|
1765 | nfs->id = nfsGlob.fs_ids++; |
---|
1766 | UNLOCK(nfsGlob.llock); |
---|
1767 | |
---|
1768 | mt_entry->fs_info = nfs; |
---|
1769 | nfs->mt_entry = mt_entry; |
---|
1770 | nfs = 0; |
---|
1771 | |
---|
1772 | e = 0; |
---|
1773 | |
---|
1774 | cleanup: |
---|
1775 | if (nfs) |
---|
1776 | nfsDestroy(nfs); |
---|
1777 | if (nfsServer) |
---|
1778 | rpcUdpServerDestroy(nfsServer); |
---|
1779 | if (rootNode) |
---|
1780 | nfsNodeDestroy(rootNode); |
---|
1781 | if (e) |
---|
1782 | rtems_set_errno_and_return_minus_one(e); |
---|
1783 | else |
---|
1784 | return 0; |
---|
1785 | } |
---|
1786 | |
---|
1787 | /* This op is called when they try to unmount THIS fs */ |
---|
1788 | STATIC void nfs_fsunmount_me( |
---|
1789 | rtems_filesystem_mount_table_entry_t *mt_entry /* in */ |
---|
1790 | ) |
---|
1791 | { |
---|
1792 | enum clnt_stat stat; |
---|
1793 | struct sockaddr_in saddr; |
---|
1794 | char *path = mt_entry->dev; |
---|
1795 | int nodesInUse; |
---|
1796 | u_long uid,gid; |
---|
1797 | int status; |
---|
1798 | |
---|
1799 | LOCK(nfsGlob.llock); |
---|
1800 | nodesInUse = ((Nfs)mt_entry->fs_info)->nodesInUse; |
---|
1801 | |
---|
1802 | if (nodesInUse > 1 /* one ref to the root node used by us */) { |
---|
1803 | UNLOCK(nfsGlob.llock); |
---|
1804 | fprintf(stderr, |
---|
1805 | "Refuse to unmount; there are still %i nodes in use (1 used by us)\n", |
---|
1806 | nodesInUse); |
---|
1807 | rtems_fatal_error_occurred(0xdeadbeef); |
---|
1808 | return; |
---|
1809 | } |
---|
1810 | |
---|
1811 | status = buildIpAddr(&uid, &gid, 0, &saddr, &path); |
---|
1812 | assert( !status ); |
---|
1813 | |
---|
1814 | stat = mntcall( &saddr, |
---|
1815 | MOUNTPROC_UMNT, |
---|
1816 | (xdrproc_t)xdr_dirpath, &path, |
---|
1817 | (xdrproc_t)xdr_void, 0, |
---|
1818 | uid, |
---|
1819 | gid |
---|
1820 | ); |
---|
1821 | |
---|
1822 | if (stat) { |
---|
1823 | UNLOCK(nfsGlob.llock); |
---|
1824 | fprintf(stderr,"NFS UMOUNT -- %s\n", clnt_sperrno(stat)); |
---|
1825 | return; |
---|
1826 | } |
---|
1827 | |
---|
1828 | nfsNodeDestroy(mt_entry->mt_fs_root->location.node_access); |
---|
1829 | mt_entry->mt_fs_root->location.node_access = 0; |
---|
1830 | |
---|
1831 | nfsDestroy(mt_entry->fs_info); |
---|
1832 | mt_entry->fs_info = 0; |
---|
1833 | |
---|
1834 | nfsGlob.num_mounted_fs--; |
---|
1835 | UNLOCK(nfsGlob.llock); |
---|
1836 | } |
---|
1837 | |
---|
1838 | /* OPTIONAL; may be NULL - BUT: CAUTION; mount() doesn't check |
---|
1839 | * for this handler to be present - a fs bug |
---|
1840 | * //NOTE: (10/25/2002) patch submitted and probably applied |
---|
1841 | */ |
---|
1842 | static rtems_filesystem_node_types_t nfs_node_type( |
---|
1843 | const rtems_filesystem_location_info_t *loc |
---|
1844 | ) |
---|
1845 | { |
---|
1846 | NfsNode node = loc->node_access; |
---|
1847 | |
---|
1848 | if (updateAttr(node, 0 /* only if old */)) |
---|
1849 | return -1; |
---|
1850 | |
---|
1851 | switch( SERP_ATTR(node).type ) { |
---|
1852 | default: |
---|
1853 | /* rtems has no value for 'unknown'; |
---|
1854 | */ |
---|
1855 | case NFNON: |
---|
1856 | case NFSOCK: |
---|
1857 | case NFBAD: |
---|
1858 | case NFFIFO: |
---|
1859 | break; |
---|
1860 | |
---|
1861 | |
---|
1862 | case NFREG: return RTEMS_FILESYSTEM_MEMORY_FILE; |
---|
1863 | case NFDIR: return RTEMS_FILESYSTEM_DIRECTORY; |
---|
1864 | |
---|
1865 | case NFBLK: |
---|
1866 | case NFCHR: return RTEMS_FILESYSTEM_DEVICE; |
---|
1867 | |
---|
1868 | case NFLNK: return RTEMS_FILESYSTEM_SYM_LINK; |
---|
1869 | } |
---|
1870 | return -1; |
---|
1871 | } |
---|
1872 | |
---|
1873 | static int nfs_mknod( |
---|
1874 | const rtems_filesystem_location_info_t *parentloc, |
---|
1875 | const char *name, |
---|
1876 | size_t namelen, |
---|
1877 | mode_t mode, |
---|
1878 | dev_t dev |
---|
1879 | ) |
---|
1880 | { |
---|
1881 | |
---|
1882 | int rv = 0; |
---|
1883 | struct timeval now; |
---|
1884 | diropres res; |
---|
1885 | NfsNode node = parentloc->node_access; |
---|
1886 | Nfs nfs = node->nfs; |
---|
1887 | mode_t type = S_IFMT & mode; |
---|
1888 | char *dupname; |
---|
1889 | |
---|
1890 | if (type != S_IFDIR && type != S_IFREG) |
---|
1891 | rtems_set_errno_and_return_minus_one(ENOTSUP); |
---|
1892 | |
---|
1893 | dupname = nfs_dupname(name, namelen); |
---|
1894 | if (dupname == NULL) |
---|
1895 | return -1; |
---|
1896 | |
---|
1897 | #if DEBUG & DEBUG_SYSCALLS |
---|
1898 | fprintf(stderr,"nfs_mknod: creating %s\n", dupname); |
---|
1899 | #endif |
---|
1900 | |
---|
1901 | rtems_clock_get_tod_timeval(&now); |
---|
1902 | |
---|
1903 | SERP_ARGS(node).createarg.name = dupname; |
---|
1904 | SERP_ARGS(node).createarg.attributes.mode = mode; |
---|
1905 | SERP_ARGS(node).createarg.attributes.uid = nfs->uid; |
---|
1906 | SERP_ARGS(node).createarg.attributes.gid = nfs->gid; |
---|
1907 | SERP_ARGS(node).createarg.attributes.size = 0; |
---|
1908 | SERP_ARGS(node).createarg.attributes.atime.seconds = now.tv_sec; |
---|
1909 | SERP_ARGS(node).createarg.attributes.atime.useconds = now.tv_usec; |
---|
1910 | SERP_ARGS(node).createarg.attributes.mtime.seconds = now.tv_sec; |
---|
1911 | SERP_ARGS(node).createarg.attributes.mtime.useconds = now.tv_usec; |
---|
1912 | |
---|
1913 | if ( nfscall( nfs->server, |
---|
1914 | (type == S_IFDIR) ? NFSPROC_MKDIR : NFSPROC_CREATE, |
---|
1915 | (xdrproc_t)xdr_createargs, &SERP_FILE(node), |
---|
1916 | (xdrproc_t)xdr_diropres, &res) |
---|
1917 | || (NFS_OK != (errno = res.status)) ) { |
---|
1918 | #if DEBUG & DEBUG_SYSCALLS |
---|
1919 | perror("nfs_mknod"); |
---|
1920 | #endif |
---|
1921 | rv = -1; |
---|
1922 | } |
---|
1923 | |
---|
1924 | free(dupname); |
---|
1925 | |
---|
1926 | return rv; |
---|
1927 | } |
---|
1928 | |
---|
1929 | static int nfs_rmnod( |
---|
1930 | const rtems_filesystem_location_info_t *parentloc, |
---|
1931 | const rtems_filesystem_location_info_t *loc |
---|
1932 | ) |
---|
1933 | { |
---|
1934 | int rv = 0; |
---|
1935 | NfsNode node = loc->node_access; |
---|
1936 | int force_update = 0; |
---|
1937 | |
---|
1938 | if (updateAttr(node, force_update) == 0) { |
---|
1939 | int proc = SERP_ATTR(node).type == NFDIR |
---|
1940 | ? NFSPROC_RMDIR |
---|
1941 | : NFSPROC_REMOVE; |
---|
1942 | |
---|
1943 | rv = nfs_do_unlink(parentloc, loc, proc); |
---|
1944 | } else { |
---|
1945 | rv = -1; |
---|
1946 | } |
---|
1947 | |
---|
1948 | return rv; |
---|
1949 | } |
---|
1950 | |
---|
1951 | static int nfs_utime( |
---|
1952 | const rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
1953 | time_t actime, /* IN */ |
---|
1954 | time_t modtime /* IN */ |
---|
1955 | ) |
---|
1956 | { |
---|
1957 | sattr arg; |
---|
1958 | |
---|
1959 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
1960 | arg.atime.seconds = actime; |
---|
1961 | arg.atime.useconds = 0; |
---|
1962 | arg.mtime.seconds = modtime; |
---|
1963 | arg.mtime.useconds = 0; |
---|
1964 | |
---|
1965 | return nfs_sattr(pathloc->node_access, &arg, SATTR_ATIME | SATTR_MTIME); |
---|
1966 | } |
---|
1967 | |
---|
1968 | static int nfs_symlink( |
---|
1969 | const rtems_filesystem_location_info_t *parentloc, |
---|
1970 | const char *name, |
---|
1971 | size_t namelen, |
---|
1972 | const char *target |
---|
1973 | ) |
---|
1974 | { |
---|
1975 | int rv = 0; |
---|
1976 | struct timeval now; |
---|
1977 | nfsstat status; |
---|
1978 | NfsNode node = parentloc->node_access; |
---|
1979 | Nfs nfs = node->nfs; |
---|
1980 | char *dupname; |
---|
1981 | |
---|
1982 | dupname = nfs_dupname(name, namelen); |
---|
1983 | if (dupname == NULL) |
---|
1984 | return -1; |
---|
1985 | |
---|
1986 | #if DEBUG & DEBUG_SYSCALLS |
---|
1987 | fprintf(stderr,"nfs_symlink: creating %s -> %s\n", dupname, target); |
---|
1988 | #endif |
---|
1989 | |
---|
1990 | rtems_clock_get_tod_timeval(&now); |
---|
1991 | |
---|
1992 | SERP_ARGS(node).symlinkarg.name = dupname; |
---|
1993 | SERP_ARGS(node).symlinkarg.to = (nfspath) target; |
---|
1994 | |
---|
1995 | SERP_ARGS(node).symlinkarg.attributes.mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; |
---|
1996 | SERP_ARGS(node).symlinkarg.attributes.uid = nfs->uid; |
---|
1997 | SERP_ARGS(node).symlinkarg.attributes.gid = nfs->gid; |
---|
1998 | SERP_ARGS(node).symlinkarg.attributes.size = 0; |
---|
1999 | SERP_ARGS(node).symlinkarg.attributes.atime.seconds = now.tv_sec; |
---|
2000 | SERP_ARGS(node).symlinkarg.attributes.atime.useconds = now.tv_usec; |
---|
2001 | SERP_ARGS(node).symlinkarg.attributes.mtime.seconds = now.tv_sec; |
---|
2002 | SERP_ARGS(node).symlinkarg.attributes.mtime.useconds = now.tv_usec; |
---|
2003 | |
---|
2004 | if ( nfscall( nfs->server, |
---|
2005 | NFSPROC_SYMLINK, |
---|
2006 | (xdrproc_t)xdr_symlinkargs, &SERP_FILE(node), |
---|
2007 | (xdrproc_t)xdr_nfsstat, &status) |
---|
2008 | || (NFS_OK != (errno = status)) ) { |
---|
2009 | #if DEBUG & DEBUG_SYSCALLS |
---|
2010 | perror("nfs_symlink"); |
---|
2011 | #endif |
---|
2012 | rv = -1; |
---|
2013 | } |
---|
2014 | |
---|
2015 | free(dupname); |
---|
2016 | |
---|
2017 | return rv; |
---|
2018 | } |
---|
2019 | |
---|
2020 | static ssize_t nfs_readlink( |
---|
2021 | const rtems_filesystem_location_info_t *loc, |
---|
2022 | char *buf, |
---|
2023 | size_t len |
---|
2024 | ) |
---|
2025 | { |
---|
2026 | NfsNode node = loc->node_access; |
---|
2027 | Nfs nfs = node->nfs; |
---|
2028 | readlinkres_strbuf rr; |
---|
2029 | |
---|
2030 | rr.strbuf.buf = buf; |
---|
2031 | rr.strbuf.max = len - 1; |
---|
2032 | |
---|
2033 | if ( nfscall(nfs->server, |
---|
2034 | NFSPROC_READLINK, |
---|
2035 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
2036 | (xdrproc_t)xdr_readlinkres_strbuf, &rr) |
---|
2037 | || (NFS_OK != (errno = rr.status)) ) { |
---|
2038 | #if DEBUG & DEBUG_SYSCALLS |
---|
2039 | perror("nfs_readlink"); |
---|
2040 | #endif |
---|
2041 | return -1; |
---|
2042 | } |
---|
2043 | |
---|
2044 | return (ssize_t) strlen(rr.strbuf.buf); |
---|
2045 | } |
---|
2046 | |
---|
2047 | static int nfs_rename( |
---|
2048 | const rtems_filesystem_location_info_t *oldparentloc, |
---|
2049 | const rtems_filesystem_location_info_t *oldloc, |
---|
2050 | const rtems_filesystem_location_info_t *newparentloc, |
---|
2051 | const char *name, |
---|
2052 | size_t namelen |
---|
2053 | ) |
---|
2054 | { |
---|
2055 | int rv = 0; |
---|
2056 | char *dupname = nfs_dupname(name, namelen); |
---|
2057 | |
---|
2058 | if (dupname != NULL) { |
---|
2059 | NfsNode oldParentNode = oldparentloc->node_access; |
---|
2060 | NfsNode oldNode = oldloc->node_access; |
---|
2061 | NfsNode newParentNode = newparentloc->node_access; |
---|
2062 | Nfs nfs = oldParentNode->nfs; |
---|
2063 | const nfs_fh *toDirSrc = &SERP_FILE(newParentNode); |
---|
2064 | nfs_fh *toDirDst = &SERP_ARGS(oldParentNode).renamearg.to.dir; |
---|
2065 | nfsstat status; |
---|
2066 | |
---|
2067 | SERP_ARGS(oldParentNode).renamearg.name = oldNode->str; |
---|
2068 | SERP_ARGS(oldParentNode).renamearg.to.name = dupname; |
---|
2069 | memcpy(toDirDst, toDirSrc, sizeof(*toDirDst)); |
---|
2070 | |
---|
2071 | rv = nfscall( |
---|
2072 | nfs->server, |
---|
2073 | NFSPROC_RENAME, |
---|
2074 | (xdrproc_t) xdr_renameargs, |
---|
2075 | &SERP_FILE(oldParentNode), |
---|
2076 | (xdrproc_t) xdr_nfsstat, |
---|
2077 | &status |
---|
2078 | ); |
---|
2079 | if (rv == 0 && (errno = status) != NFS_OK) { |
---|
2080 | rv = -1; |
---|
2081 | } |
---|
2082 | |
---|
2083 | free(dupname); |
---|
2084 | } else { |
---|
2085 | rv = -1; |
---|
2086 | } |
---|
2087 | |
---|
2088 | return rv; |
---|
2089 | } |
---|
2090 | |
---|
2091 | static void nfs_lock(rtems_filesystem_mount_table_entry_t *mt_entry) |
---|
2092 | { |
---|
2093 | } |
---|
2094 | |
---|
2095 | static void nfs_unlock(rtems_filesystem_mount_table_entry_t *mt_entry) |
---|
2096 | { |
---|
2097 | } |
---|
2098 | |
---|
2099 | static bool nfs_are_nodes_equal( |
---|
2100 | const rtems_filesystem_location_info_t *a, |
---|
2101 | const rtems_filesystem_location_info_t *b |
---|
2102 | ) |
---|
2103 | { |
---|
2104 | bool equal = false; |
---|
2105 | NfsNode na = a->node_access; |
---|
2106 | |
---|
2107 | if (updateAttr(na, 0) == 0) { |
---|
2108 | NfsNode nb = b->node_access; |
---|
2109 | |
---|
2110 | if (updateAttr(nb, 0) == 0) { |
---|
2111 | equal = SERP_ATTR(na).fileid == SERP_ATTR(nb).fileid |
---|
2112 | && SERP_ATTR(na).fsid == SERP_ATTR(nb).fsid; |
---|
2113 | } |
---|
2114 | } |
---|
2115 | |
---|
2116 | return equal; |
---|
2117 | } |
---|
2118 | |
---|
2119 | static int nfs_fchmod( |
---|
2120 | const rtems_filesystem_location_info_t *loc, |
---|
2121 | mode_t mode |
---|
2122 | ) |
---|
2123 | { |
---|
2124 | sattr arg; |
---|
2125 | |
---|
2126 | arg.mode = mode; |
---|
2127 | return nfs_sattr(loc->node_access, &arg, SATTR_MODE); |
---|
2128 | |
---|
2129 | } |
---|
2130 | |
---|
2131 | const struct _rtems_filesystem_operations_table nfs_fs_ops = { |
---|
2132 | .lock_h = nfs_lock, |
---|
2133 | .unlock_h = nfs_unlock, |
---|
2134 | .eval_path_h = nfs_eval_path, |
---|
2135 | .link_h = nfs_link, |
---|
2136 | .are_nodes_equal_h = nfs_are_nodes_equal, |
---|
2137 | .node_type_h = nfs_node_type, |
---|
2138 | .mknod_h = nfs_mknod, |
---|
2139 | .rmnod_h = nfs_rmnod, |
---|
2140 | .fchmod_h = nfs_fchmod, |
---|
2141 | .chown_h = nfs_chown, |
---|
2142 | .clonenod_h = nfs_clonenode, |
---|
2143 | .freenod_h = nfs_freenode, |
---|
2144 | .mount_h = rtems_filesystem_default_mount, |
---|
2145 | .fsmount_me_h = rtems_nfs_initialize, |
---|
2146 | .unmount_h = rtems_filesystem_default_unmount, |
---|
2147 | .fsunmount_me_h = nfs_fsunmount_me, |
---|
2148 | .utime_h = nfs_utime, |
---|
2149 | .symlink_h = nfs_symlink, |
---|
2150 | .readlink_h = nfs_readlink, |
---|
2151 | .rename_h = nfs_rename, |
---|
2152 | .statvfs_h = rtems_filesystem_default_statvfs |
---|
2153 | }; |
---|
2154 | |
---|
2155 | /***************************************** |
---|
2156 | File Handlers |
---|
2157 | |
---|
2158 | NOTE: the FS generics expect a FS' |
---|
2159 | evalpath_h() to switch the |
---|
2160 | pathloc->handlers according |
---|
2161 | to the pathloc/node's file |
---|
2162 | type. |
---|
2163 | We currently have 'file' and |
---|
2164 | 'directory' handlers and very |
---|
2165 | few 'symlink' handlers. |
---|
2166 | |
---|
2167 | The handlers for each type are |
---|
2168 | implemented or #defined ZERO |
---|
2169 | in a 'nfs_file_xxx', |
---|
2170 | 'nfs_dir_xxx', 'nfs_link_xxx' |
---|
2171 | sequence below this point. |
---|
2172 | |
---|
2173 | In some cases, a common handler, |
---|
2174 | can be used for all file types. |
---|
2175 | It is then simply called |
---|
2176 | 'nfs_xxx'. |
---|
2177 | *****************************************/ |
---|
2178 | |
---|
2179 | /* stateless NFS protocol makes this trivial */ |
---|
2180 | static int nfs_file_open( |
---|
2181 | rtems_libio_t *iop, |
---|
2182 | const char *pathname, |
---|
2183 | int oflag, |
---|
2184 | mode_t mode |
---|
2185 | ) |
---|
2186 | { |
---|
2187 | return 0; |
---|
2188 | } |
---|
2189 | |
---|
2190 | /* reading directories is not stateless; we must |
---|
2191 | * remember the last 'read' position, i.e. |
---|
2192 | * the server 'cookie'. We do manage this information |
---|
2193 | * attached to the pathinfo.node_access_2. |
---|
2194 | */ |
---|
2195 | static int nfs_dir_open( |
---|
2196 | rtems_libio_t *iop, |
---|
2197 | const char *pathname, |
---|
2198 | int oflag, |
---|
2199 | mode_t mode |
---|
2200 | ) |
---|
2201 | { |
---|
2202 | NfsNode node = iop->pathinfo.node_access; |
---|
2203 | DirInfo di; |
---|
2204 | |
---|
2205 | /* create a readdirargs object and copy the file handle; |
---|
2206 | * attach to the pathinfo.node_access_2 |
---|
2207 | */ |
---|
2208 | |
---|
2209 | di = (DirInfo) malloc(sizeof(*di)); |
---|
2210 | iop->pathinfo.node_access_2 = di; |
---|
2211 | |
---|
2212 | if ( !di ) { |
---|
2213 | errno = ENOMEM; |
---|
2214 | return -1; |
---|
2215 | } |
---|
2216 | |
---|
2217 | memcpy( &di->readdirargs.dir, |
---|
2218 | &SERP_FILE(node), |
---|
2219 | sizeof(di->readdirargs.dir) ); |
---|
2220 | |
---|
2221 | /* rewind cookie */ |
---|
2222 | memset( &di->readdirargs.cookie, |
---|
2223 | 0, |
---|
2224 | sizeof(di->readdirargs.cookie) ); |
---|
2225 | |
---|
2226 | di->eofreached = FALSE; |
---|
2227 | |
---|
2228 | return 0; |
---|
2229 | } |
---|
2230 | |
---|
2231 | static int nfs_file_close( |
---|
2232 | rtems_libio_t *iop |
---|
2233 | ) |
---|
2234 | { |
---|
2235 | return 0; |
---|
2236 | } |
---|
2237 | |
---|
2238 | static int nfs_dir_close( |
---|
2239 | rtems_libio_t *iop |
---|
2240 | ) |
---|
2241 | { |
---|
2242 | free(iop->pathinfo.node_access_2); |
---|
2243 | iop->pathinfo.node_access_2 = 0; |
---|
2244 | return 0; |
---|
2245 | } |
---|
2246 | |
---|
2247 | static ssize_t nfs_file_read_chunk( |
---|
2248 | NfsNode node, |
---|
2249 | uint32_t offset, |
---|
2250 | void *buffer, |
---|
2251 | size_t count |
---|
2252 | ) |
---|
2253 | { |
---|
2254 | readres rr; |
---|
2255 | Nfs nfs = node->nfs; |
---|
2256 | |
---|
2257 | SERP_ARGS(node).readarg.offset = offset; |
---|
2258 | SERP_ARGS(node).readarg.count = count; |
---|
2259 | SERP_ARGS(node).readarg.totalcount = UINT32_C(0xdeadbeef); |
---|
2260 | |
---|
2261 | rr.readres_u.reply.data.data_val = buffer; |
---|
2262 | |
---|
2263 | if ( nfscall( nfs->server, |
---|
2264 | NFSPROC_READ, |
---|
2265 | (xdrproc_t)xdr_readargs, &SERP_FILE(node), |
---|
2266 | (xdrproc_t)xdr_readres, &rr) ) { |
---|
2267 | return -1; |
---|
2268 | } |
---|
2269 | |
---|
2270 | |
---|
2271 | if (NFS_OK != rr.status) { |
---|
2272 | rtems_set_errno_and_return_minus_one(rr.status); |
---|
2273 | } |
---|
2274 | |
---|
2275 | #if DEBUG & DEBUG_SYSCALLS |
---|
2276 | fprintf(stderr, |
---|
2277 | "Read %i (asked for %i) bytes from offset %i to 0x%08x\n", |
---|
2278 | rr.readres_u.reply.data.data_len, |
---|
2279 | count, |
---|
2280 | iop->offset, |
---|
2281 | rr.readres_u.reply.data.data_val); |
---|
2282 | #endif |
---|
2283 | |
---|
2284 | |
---|
2285 | return rr.readres_u.reply.data.data_len; |
---|
2286 | } |
---|
2287 | |
---|
2288 | static ssize_t nfs_file_read( |
---|
2289 | rtems_libio_t *iop, |
---|
2290 | void *buffer, |
---|
2291 | size_t count |
---|
2292 | ) |
---|
2293 | { |
---|
2294 | ssize_t rv = 0; |
---|
2295 | NfsNode node = iop->pathinfo.node_access; |
---|
2296 | uint32_t offset = iop->offset; |
---|
2297 | char *in = buffer; |
---|
2298 | |
---|
2299 | do { |
---|
2300 | size_t chunk = count <= NFS_MAXDATA ? count : NFS_MAXDATA; |
---|
2301 | ssize_t done = nfs_file_read_chunk(node, offset, in, chunk); |
---|
2302 | |
---|
2303 | if (done > 0) { |
---|
2304 | offset += (uint32_t) done; |
---|
2305 | in += done; |
---|
2306 | count -= (size_t) done; |
---|
2307 | rv += done; |
---|
2308 | } else { |
---|
2309 | count = 0; |
---|
2310 | if (done < 0) { |
---|
2311 | rv = -1; |
---|
2312 | } |
---|
2313 | } |
---|
2314 | } while (count > 0); |
---|
2315 | |
---|
2316 | return rv; |
---|
2317 | } |
---|
2318 | |
---|
2319 | /* this is called by readdir() / getdents() */ |
---|
2320 | static ssize_t nfs_dir_read( |
---|
2321 | rtems_libio_t *iop, |
---|
2322 | void *buffer, |
---|
2323 | size_t count |
---|
2324 | ) |
---|
2325 | { |
---|
2326 | DirInfo di = iop->pathinfo.node_access_2; |
---|
2327 | RpcUdpServer server = ((Nfs)iop->pathinfo.mt_entry->fs_info)->server; |
---|
2328 | |
---|
2329 | if ( di->eofreached ) |
---|
2330 | return 0; |
---|
2331 | |
---|
2332 | di->ptr = di->buf = buffer; |
---|
2333 | |
---|
2334 | /* align + round down the buffer */ |
---|
2335 | count &= ~ (DIRENT_HEADER_SIZE - 1); |
---|
2336 | di->len = count; |
---|
2337 | |
---|
2338 | #if 0 |
---|
2339 | /* now estimate the number of entries we should ask for */ |
---|
2340 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2341 | |
---|
2342 | /* estimate the encoded size that might take up */ |
---|
2343 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2344 | #else |
---|
2345 | /* integer arithmetics are better done the other way round */ |
---|
2346 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2347 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2348 | #endif |
---|
2349 | |
---|
2350 | if (count > NFS_MAXDATA) |
---|
2351 | count = NFS_MAXDATA; |
---|
2352 | |
---|
2353 | di->readdirargs.count = count; |
---|
2354 | |
---|
2355 | #if DEBUG & DEBUG_READDIR |
---|
2356 | fprintf(stderr, |
---|
2357 | "Readdir: asking for %i XDR bytes, buffer is %i\n", |
---|
2358 | count, di->len); |
---|
2359 | #endif |
---|
2360 | |
---|
2361 | if ( nfscall( |
---|
2362 | server, |
---|
2363 | NFSPROC_READDIR, |
---|
2364 | (xdrproc_t)xdr_readdirargs, &di->readdirargs, |
---|
2365 | (xdrproc_t)xdr_dir_info, di) ) { |
---|
2366 | return -1; |
---|
2367 | } |
---|
2368 | |
---|
2369 | |
---|
2370 | if (NFS_OK != di->status) { |
---|
2371 | rtems_set_errno_and_return_minus_one(di->status); |
---|
2372 | } |
---|
2373 | |
---|
2374 | return (char*)di->ptr - (char*)buffer; |
---|
2375 | } |
---|
2376 | |
---|
2377 | static ssize_t nfs_file_write( |
---|
2378 | rtems_libio_t *iop, |
---|
2379 | const void *buffer, |
---|
2380 | size_t count |
---|
2381 | ) |
---|
2382 | { |
---|
2383 | NfsNode node = iop->pathinfo.node_access; |
---|
2384 | Nfs nfs = node->nfs; |
---|
2385 | int e; |
---|
2386 | |
---|
2387 | if (count > NFS_MAXDATA) |
---|
2388 | count = NFS_MAXDATA; |
---|
2389 | |
---|
2390 | |
---|
2391 | SERP_ARGS(node).writearg.beginoffset = UINT32_C(0xdeadbeef); |
---|
2392 | if ( LIBIO_FLAGS_APPEND & iop->flags ) { |
---|
2393 | if ( updateAttr(node, 0) ) { |
---|
2394 | return -1; |
---|
2395 | } |
---|
2396 | SERP_ARGS(node).writearg.offset = SERP_ATTR(node).size; |
---|
2397 | } else { |
---|
2398 | SERP_ARGS(node).writearg.offset = iop->offset; |
---|
2399 | } |
---|
2400 | SERP_ARGS(node).writearg.totalcount = UINT32_C(0xdeadbeef); |
---|
2401 | SERP_ARGS(node).writearg.data.data_len = count; |
---|
2402 | SERP_ARGS(node).writearg.data.data_val = (void*)buffer; |
---|
2403 | |
---|
2404 | /* write XDR buffer size will be chosen by nfscall based |
---|
2405 | * on the PROC specifier |
---|
2406 | */ |
---|
2407 | |
---|
2408 | if ( nfscall( nfs->server, |
---|
2409 | NFSPROC_WRITE, |
---|
2410 | (xdrproc_t)xdr_writeargs, &SERP_FILE(node), |
---|
2411 | (xdrproc_t)xdr_attrstat, &node->serporid) ) { |
---|
2412 | return -1; |
---|
2413 | } |
---|
2414 | |
---|
2415 | |
---|
2416 | if (NFS_OK != (e=node->serporid.status) ) { |
---|
2417 | /* try at least to recover the current attributes */ |
---|
2418 | updateAttr(node, 1 /* force */); |
---|
2419 | rtems_set_errno_and_return_minus_one(e); |
---|
2420 | } |
---|
2421 | |
---|
2422 | node->age = nowSeconds(); |
---|
2423 | |
---|
2424 | return count; |
---|
2425 | } |
---|
2426 | |
---|
2427 | static off_t nfs_dir_lseek( |
---|
2428 | rtems_libio_t *iop, |
---|
2429 | off_t length, |
---|
2430 | int whence |
---|
2431 | ) |
---|
2432 | { |
---|
2433 | off_t rv = rtems_filesystem_default_lseek_directory(iop, length, whence); |
---|
2434 | |
---|
2435 | if (rv == 0) { |
---|
2436 | DirInfo di = iop->pathinfo.node_access_2; |
---|
2437 | nfscookie *cookie = &di->readdirargs.cookie; |
---|
2438 | |
---|
2439 | di->eofreached = FALSE; |
---|
2440 | |
---|
2441 | /* rewind cookie */ |
---|
2442 | memset(cookie, 0, sizeof(*cookie)); |
---|
2443 | } |
---|
2444 | |
---|
2445 | return rv; |
---|
2446 | } |
---|
2447 | |
---|
2448 | #if 0 /* structure types for reference */ |
---|
2449 | struct fattr { |
---|
2450 | ftype type; |
---|
2451 | u_int mode; |
---|
2452 | u_int nlink; |
---|
2453 | u_int uid; |
---|
2454 | u_int gid; |
---|
2455 | u_int size; |
---|
2456 | u_int blocksize; |
---|
2457 | u_int rdev; |
---|
2458 | u_int blocks; |
---|
2459 | u_int fsid; |
---|
2460 | u_int fileid; |
---|
2461 | nfstime atime; |
---|
2462 | nfstime mtime; |
---|
2463 | nfstime ctime; |
---|
2464 | }; |
---|
2465 | |
---|
2466 | struct stat |
---|
2467 | { |
---|
2468 | dev_t st_dev; |
---|
2469 | ino_t st_ino; |
---|
2470 | mode_t st_mode; |
---|
2471 | nlink_t st_nlink; |
---|
2472 | uid_t st_uid; |
---|
2473 | gid_t st_gid; |
---|
2474 | dev_t st_rdev; |
---|
2475 | off_t st_size; |
---|
2476 | /* SysV/sco doesn't have the rest... But Solaris, eabi does. */ |
---|
2477 | #if defined(__svr4__) && !defined(__PPC__) && !defined(__sun__) |
---|
2478 | time_t st_atime; |
---|
2479 | time_t st_mtime; |
---|
2480 | time_t st_ctime; |
---|
2481 | #else |
---|
2482 | time_t st_atime; |
---|
2483 | long st_spare1; |
---|
2484 | time_t st_mtime; |
---|
2485 | long st_spare2; |
---|
2486 | time_t st_ctime; |
---|
2487 | long st_spare3; |
---|
2488 | long st_blksize; |
---|
2489 | long st_blocks; |
---|
2490 | long st_spare4[2]; |
---|
2491 | #endif |
---|
2492 | }; |
---|
2493 | #endif |
---|
2494 | |
---|
2495 | /* common for file/dir/link */ |
---|
2496 | static int nfs_fstat( |
---|
2497 | const rtems_filesystem_location_info_t *loc, |
---|
2498 | struct stat *buf |
---|
2499 | ) |
---|
2500 | { |
---|
2501 | NfsNode node = loc->node_access; |
---|
2502 | fattr *fa = &SERP_ATTR(node); |
---|
2503 | |
---|
2504 | if (updateAttr(node, 0 /* only if old */)) { |
---|
2505 | return -1; |
---|
2506 | } |
---|
2507 | |
---|
2508 | /* done by caller |
---|
2509 | memset(buf, 0, sizeof(*buf)); |
---|
2510 | */ |
---|
2511 | |
---|
2512 | /* translate */ |
---|
2513 | |
---|
2514 | /* one of the branches hopefully is optimized away */ |
---|
2515 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
2516 | buf->st_dev = NFS_MAKE_DEV_T_INO_HACK((NfsNode)loc->node_access); |
---|
2517 | } else { |
---|
2518 | buf->st_dev = NFS_MAKE_DEV_T((NfsNode)loc->node_access); |
---|
2519 | } |
---|
2520 | buf->st_mode = fa->mode; |
---|
2521 | buf->st_nlink = fa->nlink; |
---|
2522 | buf->st_uid = fa->uid; |
---|
2523 | buf->st_gid = fa->gid; |
---|
2524 | buf->st_size = fa->size; |
---|
2525 | /* Set to "preferred size" of this NFS client implementation */ |
---|
2526 | buf->st_blksize = nfsStBlksize ? nfsStBlksize : fa->blocksize; |
---|
2527 | buf->st_rdev = fa->rdev; |
---|
2528 | buf->st_blocks = fa->blocks; |
---|
2529 | buf->st_ino = fa->fileid; |
---|
2530 | buf->st_atime = fa->atime.seconds; |
---|
2531 | buf->st_mtime = fa->mtime.seconds; |
---|
2532 | buf->st_ctime = fa->ctime.seconds; |
---|
2533 | |
---|
2534 | #if 0 /* NFS should return the modes */ |
---|
2535 | switch(fa->type) { |
---|
2536 | default: |
---|
2537 | case NFNON: |
---|
2538 | case NFBAD: |
---|
2539 | break; |
---|
2540 | |
---|
2541 | case NFSOCK: buf->st_mode |= S_IFSOCK; break; |
---|
2542 | case NFFIFO: buf->st_mode |= S_IFIFO; break; |
---|
2543 | case NFREG : buf->st_mode |= S_IFREG; break; |
---|
2544 | case NFDIR : buf->st_mode |= S_IFDIR; break; |
---|
2545 | case NFBLK : buf->st_mode |= S_IFBLK; break; |
---|
2546 | case NFCHR : buf->st_mode |= S_IFCHR; break; |
---|
2547 | case NFLNK : buf->st_mode |= S_IFLNK; break; |
---|
2548 | } |
---|
2549 | #endif |
---|
2550 | |
---|
2551 | return 0; |
---|
2552 | } |
---|
2553 | |
---|
2554 | /* a helper which does the real work for |
---|
2555 | * a couple of handlers (such as chmod, |
---|
2556 | * ftruncate or utime) |
---|
2557 | */ |
---|
2558 | static int |
---|
2559 | nfs_sattr(NfsNode node, sattr *arg, u_long mask) |
---|
2560 | { |
---|
2561 | |
---|
2562 | struct timeval now; |
---|
2563 | nfstime nfsnow, t; |
---|
2564 | int e; |
---|
2565 | u_int mode; |
---|
2566 | |
---|
2567 | if (updateAttr(node, 0 /* only if old */)) |
---|
2568 | return -1; |
---|
2569 | |
---|
2570 | rtems_clock_get_tod_timeval(&now); |
---|
2571 | |
---|
2572 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
2573 | nfsnow.seconds = now.tv_sec; |
---|
2574 | nfsnow.useconds = now.tv_usec; |
---|
2575 | |
---|
2576 | /* merge permission bits into existing type bits */ |
---|
2577 | mode = SERP_ATTR(node).mode; |
---|
2578 | if (mask & SATTR_MODE) { |
---|
2579 | mode &= S_IFMT; |
---|
2580 | mode |= arg->mode & ~S_IFMT; |
---|
2581 | } else { |
---|
2582 | mode = -1; |
---|
2583 | } |
---|
2584 | SERP_ARGS(node).sattrarg.attributes.mode = mode; |
---|
2585 | |
---|
2586 | SERP_ARGS(node).sattrarg.attributes.uid = |
---|
2587 | (mask & SATTR_UID) ? arg->uid : -1; |
---|
2588 | |
---|
2589 | SERP_ARGS(node).sattrarg.attributes.gid = |
---|
2590 | (mask & SATTR_GID) ? arg->gid : -1; |
---|
2591 | |
---|
2592 | SERP_ARGS(node).sattrarg.attributes.size = |
---|
2593 | (mask & SATTR_SIZE) ? arg->size : -1; |
---|
2594 | |
---|
2595 | if (mask & SATTR_ATIME) |
---|
2596 | t = arg->atime; |
---|
2597 | else if (mask & SATTR_TOUCHA) |
---|
2598 | t = nfsnow; |
---|
2599 | else |
---|
2600 | t.seconds = t.useconds = -1; |
---|
2601 | SERP_ARGS(node).sattrarg.attributes.atime = t; |
---|
2602 | |
---|
2603 | if (mask & SATTR_ATIME) |
---|
2604 | t = arg->mtime; |
---|
2605 | else if (mask & SATTR_TOUCHA) |
---|
2606 | t = nfsnow; |
---|
2607 | else |
---|
2608 | t.seconds = t.useconds = -1; |
---|
2609 | SERP_ARGS(node).sattrarg.attributes.mtime = t; |
---|
2610 | |
---|
2611 | node->serporid.status = NFS_OK; |
---|
2612 | |
---|
2613 | if ( nfscall( node->nfs->server, |
---|
2614 | NFSPROC_SETATTR, |
---|
2615 | (xdrproc_t)xdr_sattrargs, &SERP_FILE(node), |
---|
2616 | (xdrproc_t)xdr_attrstat, &node->serporid) ) { |
---|
2617 | #if DEBUG & DEBUG_SYSCALLS |
---|
2618 | fprintf(stderr, |
---|
2619 | "nfs_sattr (mask 0x%08x): %s", |
---|
2620 | mask, |
---|
2621 | strerror(errno)); |
---|
2622 | #endif |
---|
2623 | return -1; |
---|
2624 | } |
---|
2625 | |
---|
2626 | if (NFS_OK != (e=node->serporid.status) ) { |
---|
2627 | #if DEBUG & DEBUG_SYSCALLS |
---|
2628 | fprintf(stderr,"nfs_sattr: %s\n",strerror(e)); |
---|
2629 | #endif |
---|
2630 | /* try at least to recover the current attributes */ |
---|
2631 | updateAttr(node, 1 /* force */); |
---|
2632 | rtems_set_errno_and_return_minus_one(e); |
---|
2633 | } |
---|
2634 | |
---|
2635 | node->age = nowSeconds(); |
---|
2636 | |
---|
2637 | return 0; |
---|
2638 | } |
---|
2639 | |
---|
2640 | /* just set the size attribute to 'length' |
---|
2641 | * the server will take care of the rest :-) |
---|
2642 | */ |
---|
2643 | static int nfs_file_ftruncate( |
---|
2644 | rtems_libio_t *iop, |
---|
2645 | off_t length |
---|
2646 | ) |
---|
2647 | { |
---|
2648 | sattr arg; |
---|
2649 | |
---|
2650 | arg.size = length; |
---|
2651 | /* must not modify any other attribute; if we are not the owner |
---|
2652 | * of the file or directory but only have write access changing |
---|
2653 | * any attribute besides 'size' will fail... |
---|
2654 | */ |
---|
2655 | return nfs_sattr(iop->pathinfo.node_access, |
---|
2656 | &arg, |
---|
2657 | SATTR_SIZE); |
---|
2658 | } |
---|
2659 | |
---|
2660 | /* the file handlers table */ |
---|
2661 | static const |
---|
2662 | struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers = { |
---|
2663 | .open_h = nfs_file_open, |
---|
2664 | .close_h = nfs_file_close, |
---|
2665 | .read_h = nfs_file_read, |
---|
2666 | .write_h = nfs_file_write, |
---|
2667 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2668 | .lseek_h = rtems_filesystem_default_lseek_file, |
---|
2669 | .fstat_h = nfs_fstat, |
---|
2670 | .ftruncate_h = nfs_file_ftruncate, |
---|
2671 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2672 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2673 | .fcntl_h = rtems_filesystem_default_fcntl |
---|
2674 | }; |
---|
2675 | |
---|
2676 | /* the directory handlers table */ |
---|
2677 | static const |
---|
2678 | struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers = { |
---|
2679 | .open_h = nfs_dir_open, |
---|
2680 | .close_h = nfs_dir_close, |
---|
2681 | .read_h = nfs_dir_read, |
---|
2682 | .write_h = rtems_filesystem_default_write, |
---|
2683 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2684 | .lseek_h = nfs_dir_lseek, |
---|
2685 | .fstat_h = nfs_fstat, |
---|
2686 | .ftruncate_h = rtems_filesystem_default_ftruncate_directory, |
---|
2687 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2688 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2689 | .fcntl_h = rtems_filesystem_default_fcntl |
---|
2690 | }; |
---|
2691 | |
---|
2692 | /* the link handlers table */ |
---|
2693 | static const |
---|
2694 | struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers = { |
---|
2695 | .open_h = rtems_filesystem_default_open, |
---|
2696 | .close_h = rtems_filesystem_default_close, |
---|
2697 | .read_h = rtems_filesystem_default_read, |
---|
2698 | .write_h = rtems_filesystem_default_write, |
---|
2699 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2700 | .lseek_h = rtems_filesystem_default_lseek, |
---|
2701 | .fstat_h = nfs_fstat, |
---|
2702 | .ftruncate_h = rtems_filesystem_default_ftruncate, |
---|
2703 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2704 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2705 | .fcntl_h = rtems_filesystem_default_fcntl |
---|
2706 | }; |
---|
2707 | |
---|
2708 | /* we need a dummy driver entry table to get a |
---|
2709 | * major number from the system |
---|
2710 | */ |
---|
2711 | static |
---|
2712 | rtems_device_driver nfs_initialize( |
---|
2713 | rtems_device_major_number major, |
---|
2714 | rtems_device_minor_number minor, |
---|
2715 | void *arg |
---|
2716 | ) |
---|
2717 | { |
---|
2718 | /* we don't really use this routine because |
---|
2719 | * we cannot supply an argument (contrary |
---|
2720 | * to what the 'arg' parameter suggests - it |
---|
2721 | * is always set to 0 by the generics :-() |
---|
2722 | * and because we don't want the user to |
---|
2723 | * have to deal with the major number (which |
---|
2724 | * OTOH is something WE are interested in. The |
---|
2725 | * only reason for using this API was getting |
---|
2726 | * a major number, after all). |
---|
2727 | * |
---|
2728 | * Something must be present, however, to |
---|
2729 | * reserve a slot in the driver table. |
---|
2730 | */ |
---|
2731 | return RTEMS_SUCCESSFUL; |
---|
2732 | } |
---|
2733 | |
---|
2734 | static rtems_driver_address_table drvNfs = { |
---|
2735 | nfs_initialize, |
---|
2736 | 0, /* open */ |
---|
2737 | 0, /* close */ |
---|
2738 | 0, /* read */ |
---|
2739 | 0, /* write */ |
---|
2740 | 0 /* control */ |
---|
2741 | }; |
---|
2742 | |
---|
2743 | /* Dump a list of the currently mounted NFS to a file */ |
---|
2744 | int |
---|
2745 | nfsMountsShow(FILE *f) |
---|
2746 | { |
---|
2747 | char *mntpt = 0; |
---|
2748 | Nfs nfs; |
---|
2749 | |
---|
2750 | if (!f) |
---|
2751 | f = stdout; |
---|
2752 | |
---|
2753 | if ( !(mntpt=malloc(MAXPATHLEN)) ) { |
---|
2754 | fprintf(stderr,"nfsMountsShow(): no memory\n"); |
---|
2755 | return -1; |
---|
2756 | } |
---|
2757 | |
---|
2758 | fprintf(f,"Currently Mounted NFS:\n"); |
---|
2759 | |
---|
2760 | LOCK(nfsGlob.llock); |
---|
2761 | |
---|
2762 | for (nfs = nfsGlob.mounted_fs; nfs; nfs=nfs->next) { |
---|
2763 | fprintf(f,"%s on ", nfs->mt_entry->dev); |
---|
2764 | if (rtems_filesystem_resolve_location(mntpt, MAXPATHLEN, &nfs->mt_entry->mt_fs_root->location)) |
---|
2765 | fprintf(f,"<UNABLE TO LOOKUP MOUNTPOINT>\n"); |
---|
2766 | else |
---|
2767 | fprintf(f,"%s\n",mntpt); |
---|
2768 | } |
---|
2769 | |
---|
2770 | UNLOCK(nfsGlob.llock); |
---|
2771 | |
---|
2772 | free(mntpt); |
---|
2773 | return 0; |
---|
2774 | } |
---|
2775 | |
---|
2776 | #if 0 |
---|
2777 | CCJ_REMOVE_MOUNT |
---|
2778 | /* convenience wrapper |
---|
2779 | * |
---|
2780 | * NOTE: this routine calls NON-REENTRANT |
---|
2781 | * gethostbyname() if the host is |
---|
2782 | * not in 'dot' notation. |
---|
2783 | */ |
---|
2784 | int |
---|
2785 | nfsMount(char *uidhost, char *path, char *mntpoint) |
---|
2786 | { |
---|
2787 | struct stat st; |
---|
2788 | int devl; |
---|
2789 | char *host; |
---|
2790 | int rval = -1; |
---|
2791 | char *dev = 0; |
---|
2792 | |
---|
2793 | if (!uidhost || !path || !mntpoint) { |
---|
2794 | fprintf(stderr,"usage: nfsMount(""[uid.gid@]host"",""path"",""mountpoint"")\n"); |
---|
2795 | nfsMountsShow(stderr); |
---|
2796 | return -1; |
---|
2797 | } |
---|
2798 | |
---|
2799 | if ( !(dev = malloc((devl=strlen(uidhost) + 20 + strlen(path)+1))) ) { |
---|
2800 | fprintf(stderr,"nfsMount: out of memory\n"); |
---|
2801 | return -1; |
---|
2802 | } |
---|
2803 | |
---|
2804 | /* Try to create the mount point if nonexistent */ |
---|
2805 | if (stat(mntpoint, &st)) { |
---|
2806 | if (ENOENT != errno) { |
---|
2807 | perror("nfsMount trying to create mount point - stat failed"); |
---|
2808 | goto cleanup; |
---|
2809 | } else if (mkdir(mntpoint,0777)) { |
---|
2810 | perror("nfsMount trying to create mount point"); |
---|
2811 | goto cleanup; |
---|
2812 | } |
---|
2813 | } |
---|
2814 | |
---|
2815 | if ( !(host=strchr(uidhost,UIDSEP)) ) { |
---|
2816 | host = uidhost; |
---|
2817 | } else { |
---|
2818 | host++; |
---|
2819 | } |
---|
2820 | |
---|
2821 | if (isdigit((unsigned char)*host)) { |
---|
2822 | /* avoid using gethostbyname */ |
---|
2823 | sprintf(dev,"%s:%s",uidhost,path); |
---|
2824 | } else { |
---|
2825 | struct hostent *h; |
---|
2826 | |
---|
2827 | /* copy the uid part (hostname will be |
---|
2828 | * overwritten) |
---|
2829 | */ |
---|
2830 | strcpy(dev, uidhost); |
---|
2831 | |
---|
2832 | /* NOTE NOTE NOTE: gethostbyname is NOT |
---|
2833 | * thread safe. This is UGLY |
---|
2834 | */ |
---|
2835 | |
---|
2836 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
2837 | |
---|
2838 | h = gethostbyname(host); |
---|
2839 | |
---|
2840 | if ( !h || |
---|
2841 | !inet_ntop( AF_INET, |
---|
2842 | (struct in_addr*)h->h_addr_list[0], |
---|
2843 | dev + (host - uidhost), |
---|
2844 | devl - (host - uidhost) ) |
---|
2845 | ) { |
---|
2846 | fprintf(stderr,"nfsMount: host '%s' not found\n",host); |
---|
2847 | goto cleanup; |
---|
2848 | } |
---|
2849 | |
---|
2850 | /* END OF NON-THREAD SAFE REGION */ |
---|
2851 | |
---|
2852 | /* append ':<path>' */ |
---|
2853 | strcat(dev,":"); |
---|
2854 | strcat(dev,path); |
---|
2855 | } |
---|
2856 | |
---|
2857 | printf("Trying to mount %s on %s\n",dev,mntpoint); |
---|
2858 | |
---|
2859 | if (mount(dev, |
---|
2860 | mntpoint, |
---|
2861 | "nfs", |
---|
2862 | RTEMS_FILESYSTEM_READ_WRITE, |
---|
2863 | NULL)) { |
---|
2864 | perror("nfsMount - mount"); |
---|
2865 | goto cleanup; |
---|
2866 | } |
---|
2867 | |
---|
2868 | rval = 0; |
---|
2869 | |
---|
2870 | cleanup: |
---|
2871 | free(dev); |
---|
2872 | return rval; |
---|
2873 | } |
---|
2874 | #endif |
---|
2875 | |
---|
2876 | /* HERE COMES A REALLY UGLY HACK */ |
---|
2877 | |
---|
2878 | /* This is stupid; it is _very_ hard to find the path |
---|
2879 | * leading to a rtems_filesystem_location_info_t node :-( |
---|
2880 | * The only easy way is making the location the current |
---|
2881 | * directory and issue a getcwd(). |
---|
2882 | * However, since we don't want to tamper with the |
---|
2883 | * current directory, we must create a separate |
---|
2884 | * task to do the job for us - sigh. |
---|
2885 | */ |
---|
2886 | |
---|
2887 | typedef struct ResolvePathArgRec_ { |
---|
2888 | rtems_filesystem_location_info_t *loc; /* IN: location to resolve */ |
---|
2889 | char *buf; /* IN/OUT: buffer where to put the path */ |
---|
2890 | int len; /* IN: buffer length */ |
---|
2891 | rtems_id sync; /* IN: synchronization */ |
---|
2892 | rtems_status_code status; /* OUT: result */ |
---|
2893 | } ResolvePathArgRec, *ResolvePathArg; |
---|
2894 | |
---|
2895 | static void |
---|
2896 | resolve_path(rtems_task_argument arg) |
---|
2897 | { |
---|
2898 | ResolvePathArg rpa = (ResolvePathArg)arg; |
---|
2899 | rtems_filesystem_location_info_t old; |
---|
2900 | |
---|
2901 | /* IMPORTANT: let the helper task have its own libio environment (i.e. cwd) */ |
---|
2902 | if (RTEMS_SUCCESSFUL == (rpa->status = rtems_libio_set_private_env())) { |
---|
2903 | |
---|
2904 | old = rtems_filesystem_current->location; |
---|
2905 | |
---|
2906 | rtems_filesystem_current->location = *(rpa->loc); |
---|
2907 | |
---|
2908 | if ( !getcwd(rpa->buf, rpa->len) ) |
---|
2909 | rpa->status = RTEMS_UNSATISFIED; |
---|
2910 | |
---|
2911 | /* must restore the cwd because 'freenode' will be called on it */ |
---|
2912 | rtems_filesystem_current->location = old; |
---|
2913 | } |
---|
2914 | rtems_semaphore_release(rpa->sync); |
---|
2915 | rtems_task_delete(RTEMS_SELF); |
---|
2916 | } |
---|
2917 | |
---|
2918 | |
---|
2919 | /* a utility routine to find the path leading to a |
---|
2920 | * rtems_filesystem_location_info_t node |
---|
2921 | * |
---|
2922 | * INPUT: 'loc' and a buffer 'buf' (length 'len') to hold the |
---|
2923 | * path. |
---|
2924 | * OUTPUT: path copied into 'buf' |
---|
2925 | * |
---|
2926 | * RETURNS: 0 on success, RTEMS error code on error. |
---|
2927 | */ |
---|
2928 | rtems_status_code |
---|
2929 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc) |
---|
2930 | { |
---|
2931 | ResolvePathArgRec arg; |
---|
2932 | rtems_id tid = 0; |
---|
2933 | rtems_task_priority pri; |
---|
2934 | rtems_status_code status; |
---|
2935 | |
---|
2936 | arg.loc = loc; |
---|
2937 | arg.buf = buf; |
---|
2938 | arg.len = len; |
---|
2939 | arg.sync = 0; |
---|
2940 | |
---|
2941 | status = rtems_semaphore_create( |
---|
2942 | rtems_build_name('r','e','s','s'), |
---|
2943 | 0, |
---|
2944 | RTEMS_SIMPLE_BINARY_SEMAPHORE, |
---|
2945 | 0, |
---|
2946 | &arg.sync); |
---|
2947 | |
---|
2948 | if (RTEMS_SUCCESSFUL != status) |
---|
2949 | goto cleanup; |
---|
2950 | |
---|
2951 | rtems_task_set_priority(RTEMS_SELF, RTEMS_CURRENT_PRIORITY, &pri); |
---|
2952 | |
---|
2953 | status = rtems_task_create( |
---|
2954 | rtems_build_name('r','e','s','s'), |
---|
2955 | pri, |
---|
2956 | RTEMS_MINIMUM_STACK_SIZE + 50000, |
---|
2957 | RTEMS_DEFAULT_MODES, |
---|
2958 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
2959 | &tid); |
---|
2960 | |
---|
2961 | if (RTEMS_SUCCESSFUL != status) |
---|
2962 | goto cleanup; |
---|
2963 | |
---|
2964 | status = rtems_task_start(tid, resolve_path, (rtems_task_argument)&arg); |
---|
2965 | |
---|
2966 | if (RTEMS_SUCCESSFUL != status) { |
---|
2967 | rtems_task_delete(tid); |
---|
2968 | goto cleanup; |
---|
2969 | } |
---|
2970 | |
---|
2971 | |
---|
2972 | /* synchronize with the helper task */ |
---|
2973 | rtems_semaphore_obtain(arg.sync, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
2974 | |
---|
2975 | status = arg.status; |
---|
2976 | |
---|
2977 | cleanup: |
---|
2978 | if (arg.sync) |
---|
2979 | rtems_semaphore_delete(arg.sync); |
---|
2980 | |
---|
2981 | return status; |
---|
2982 | } |
---|
2983 | |
---|
2984 | int |
---|
2985 | nfsSetTimeout(uint32_t timeout_ms) |
---|
2986 | { |
---|
2987 | rtems_interrupt_level k; |
---|
2988 | uint32_t s,us; |
---|
2989 | |
---|
2990 | if ( timeout_ms > 100000 ) { |
---|
2991 | /* out of range */ |
---|
2992 | return -1; |
---|
2993 | } |
---|
2994 | |
---|
2995 | s = timeout_ms/1000; |
---|
2996 | us = (timeout_ms % 1000) * 1000; |
---|
2997 | |
---|
2998 | rtems_interrupt_disable(k); |
---|
2999 | _nfscalltimeout.tv_sec = s; |
---|
3000 | _nfscalltimeout.tv_usec = us; |
---|
3001 | rtems_interrupt_enable(k); |
---|
3002 | |
---|
3003 | return 0; |
---|
3004 | } |
---|
3005 | |
---|
3006 | uint32_t |
---|
3007 | nfsGetTimeout( void ) |
---|
3008 | { |
---|
3009 | rtems_interrupt_level k; |
---|
3010 | uint32_t s,us; |
---|
3011 | rtems_interrupt_disable(k); |
---|
3012 | s = _nfscalltimeout.tv_sec; |
---|
3013 | us = _nfscalltimeout.tv_usec; |
---|
3014 | rtems_interrupt_enable(k); |
---|
3015 | return s*1000 + us/1000; |
---|
3016 | } |
---|