1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief NFS Client Implementation for RTEMS |
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5 | * @ingroup libfs |
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6 | * |
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7 | * Hooks Into the RTEMS NFS Filesystem |
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8 | */ |
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9 | |
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10 | /* |
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11 | * Author: Till Straumann <strauman@slac.stanford.edu>, 2002 |
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12 | * |
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13 | * Hacked on by others. |
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14 | * |
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15 | * Modifications to support reference counting in the file system are |
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16 | * Copyright (c) 2012 embedded brains GmbH. |
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17 | * |
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18 | * Authorship |
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19 | * ---------- |
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20 | * This software (NFS-2 client implementation for RTEMS) was created by |
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21 | * Till Straumann <strauman@slac.stanford.edu>, 2002-2007, |
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22 | * Stanford Linear Accelerator Center, Stanford University. |
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23 | * |
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24 | * Acknowledgement of sponsorship |
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25 | * ------------------------------ |
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26 | * The NFS-2 client implementation for RTEMS was produced by |
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27 | * the Stanford Linear Accelerator Center, Stanford University, |
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28 | * under Contract DE-AC03-76SFO0515 with the Department of Energy. |
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29 | * |
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30 | * Government disclaimer of liability |
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31 | * ---------------------------------- |
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32 | * Neither the United States nor the United States Department of Energy, |
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33 | * nor any of their employees, makes any warranty, express or implied, or |
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34 | * assumes any legal liability or responsibility for the accuracy, |
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35 | * completeness, or usefulness of any data, apparatus, product, or process |
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36 | * disclosed, or represents that its use would not infringe privately owned |
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37 | * rights. |
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38 | * |
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39 | * Stanford disclaimer of liability |
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40 | * -------------------------------- |
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41 | * Stanford University makes no representations or warranties, express or |
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42 | * implied, nor assumes any liability for the use of this software. |
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43 | * |
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44 | * Stanford disclaimer of copyright |
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45 | * -------------------------------- |
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46 | * Stanford University, owner of the copyright, hereby disclaims its |
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47 | * copyright and all other rights in this software. Hence, anyone may |
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48 | * freely use it for any purpose without restriction. |
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49 | * |
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50 | * Maintenance of notices |
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51 | * ---------------------- |
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52 | * In the interest of clarity regarding the origin and status of this |
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53 | * SLAC software, this and all the preceding Stanford University notices |
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54 | * are to remain affixed to any copy or derivative of this software made |
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55 | * or distributed by the recipient and are to be affixed to any copy of |
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56 | * software made or distributed by the recipient that contains a copy or |
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57 | * derivative of this software. |
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58 | * |
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59 | * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 |
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60 | */ |
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61 | |
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62 | #ifdef HAVE_CONFIG_H |
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63 | #include <config.h> |
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64 | #endif |
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65 | |
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66 | #include <rtems.h> |
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67 | #include <rtems/libio.h> |
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68 | #include <rtems/libio_.h> |
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69 | #include <rtems/seterr.h> |
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70 | #include <string.h> |
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71 | #include <stdio.h> |
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72 | #include <stdlib.h> |
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73 | #include <assert.h> |
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74 | #include <sys/stat.h> |
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75 | #include <dirent.h> |
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76 | #include <netdb.h> |
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77 | #include <ctype.h> |
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78 | #include <netinet/in.h> |
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79 | #include <arpa/inet.h> |
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80 | |
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81 | #include <nfs_prot.h> |
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82 | #include <mount_prot.h> |
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83 | |
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84 | #include "rpcio.h" |
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85 | #include "librtemsNfs.h" |
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86 | |
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87 | /* Configurable parameters */ |
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88 | |
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89 | /* Estimated average length of a filename (including terminating 0). |
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90 | * This was calculated by doing |
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91 | * |
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92 | * find <some root> -print -exec basename '{}' \; > feil |
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93 | * wc feil |
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94 | * |
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95 | * AVG_NAMLEN = (num_chars + num_lines)/num_lines |
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96 | */ |
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97 | #define CONFIG_AVG_NAMLEN 10 |
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98 | |
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99 | #define CONFIG_NFS_SMALL_XACT_SIZE 800 /* size of RPC arguments for non-write ops */ |
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100 | /* lifetime of NFS attributes in a NfsNode; |
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101 | * the time is in seconds and the lifetime is |
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102 | * infinite if the symbol is #undef |
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103 | */ |
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104 | #define CONFIG_ATTR_LIFETIME 10/*secs*/ |
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105 | |
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106 | /* |
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107 | * The 'st_blksize' (stat(2)) value this nfs |
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108 | * client should report. If set to zero then the server's fattr data |
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109 | * is passed throught which is not necessary optimal. |
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110 | * Newlib's stdio uses 'st_blksize' (if built with HAVE_BLKSIZE defined) |
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111 | * to size the default buffer. |
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112 | * Due to the overhead of NFS it is probably better to use the maximum |
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113 | * size of an NFS read request (8k) rather than the optimal block |
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114 | * size on the server. |
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115 | * This value can be overridden at run-time by setting the global |
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116 | * variable 'nfsStBlksize'. |
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117 | * Thanks to Steven Johnson <sjohnson@sakuraindustries.com> for helping |
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118 | * working on this issue. |
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119 | */ |
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120 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
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121 | |
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122 | /* dont change this without changing the maximal write size */ |
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123 | #define CONFIG_NFS_BIG_XACT_SIZE UDPMSGSIZE /* dont change this */ |
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124 | |
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125 | /* The real values for these are specified further down */ |
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126 | #define NFSCALL_TIMEOUT (&_nfscalltimeout) |
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127 | #define MNTCALL_TIMEOUT (&_nfscalltimeout) |
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128 | static struct timeval _nfscalltimeout = { 10, 0 }; /* {secs, us } */ |
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129 | |
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130 | /* More or less fixed constants; in particular, NFS3 is not supported */ |
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131 | #define DELIM '/' |
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132 | #define HOSTDELIM ':' |
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133 | #define UPDIR ".." |
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134 | #define UIDSEP '@' |
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135 | #define NFS_VERSION_2 NFS_VERSION |
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136 | |
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137 | /* we use a dynamically assigned major number */ |
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138 | #define NFS_MAJOR (nfsGlob.nfs_major) |
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139 | |
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140 | |
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141 | /* NOTE: RTEMS (ss-20020301) uses a 'short st_ino' type :-( but the |
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142 | * NFS fileid is 32 bit. [Later versions of RTEMS have fixed this; |
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143 | * nfsInit() issues a warning if you run a version with 'short st_ino'.] |
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144 | * |
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145 | * As a workarount, we merge the upper 16bits of the fileid into the |
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146 | * minor device no. Hence, it is still possible to uniquely identify |
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147 | * a file by looking at its device number (major = nfs, minor = part |
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148 | * of the fileid + our 'nfs-id' identifier). |
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149 | * |
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150 | * This has an impact on performance, as e.g. getcwd() stats() all |
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151 | * directory entries when it believes it has crossed a mount point |
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152 | * (a.st_dev != b.st_dev). |
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153 | * |
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154 | * OTOH, it also might cause node comparison failure! E.g. 'getcwd()' |
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155 | * assumes that two nodes residing in the same directory must be located |
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156 | * on the same device and hence compares 'st_ino' only. |
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157 | * If two files in the same directory have the same inode number |
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158 | * modulo 2^16, they will be considered equal (although their device |
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159 | * number doesn't match - getcwd doesn't look at it). |
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160 | * |
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161 | * Other software might or might not be affected. |
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162 | * |
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163 | * The only clean solution to this problem is bumping up the size of |
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164 | * 'ino_t' at least to 'long'. |
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165 | * Note that this requires _all_ software (libraries etc.) to be |
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166 | * recompiled. |
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167 | */ |
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168 | |
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169 | #define NFS_MAKE_DEV_T_INO_HACK(node) \ |
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170 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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171 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (((rtems_device_minor_number)SERP_ATTR((node)).fileid) >> 16) ) |
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172 | |
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173 | /* use our 'nfs id' and the server's fsid for the minor device number |
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174 | * this should be fairly unique |
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175 | */ |
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176 | #define NFS_MAKE_DEV_T(node) \ |
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177 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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178 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (SERP_ATTR((node)).fsid & (((rtems_device_minor_number)1<<16)-1)) ) |
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179 | |
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180 | #define DIRENT_HEADER_SIZE ( sizeof(struct dirent) - \ |
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181 | sizeof( ((struct dirent *)0)->d_name ) ) |
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182 | |
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183 | |
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184 | /* debugging flags */ |
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185 | #define DEBUG_COUNT_NODES (1<<0) |
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186 | #define DEBUG_TRACK_NODES (1<<1) |
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187 | #define DEBUG_EVALPATH (1<<2) |
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188 | #define DEBUG_READDIR (1<<3) |
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189 | #define DEBUG_SYSCALLS (1<<4) |
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190 | |
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191 | /* #define DEBUG ( DEBUG_SYSCALLS | DEBUG_COUNT_NODES ) */ |
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192 | |
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193 | #ifdef DEBUG |
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194 | #define STATIC |
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195 | #else |
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196 | #define STATIC static |
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197 | #endif |
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198 | |
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199 | #define MUTEX_ATTRIBUTES (RTEMS_LOCAL | \ |
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200 | RTEMS_PRIORITY | \ |
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201 | RTEMS_INHERIT_PRIORITY | \ |
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202 | RTEMS_BINARY_SEMAPHORE) |
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203 | |
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204 | #define LOCK(s) do { \ |
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205 | rtems_semaphore_obtain((s), \ |
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206 | RTEMS_WAIT, \ |
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207 | RTEMS_NO_TIMEOUT); \ |
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208 | } while (0) |
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209 | |
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210 | #define UNLOCK(s) do { rtems_semaphore_release((s)); \ |
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211 | } while (0) |
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212 | |
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213 | static inline char * |
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214 | nfs_dupname(const char *name, size_t namelen) |
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215 | { |
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216 | char *dupname = malloc(namelen + 1); |
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217 | |
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218 | if (dupname != NULL) { |
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219 | memcpy(dupname, name, namelen); |
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220 | dupname [namelen] = '\0'; |
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221 | } else { |
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222 | errno = ENOMEM; |
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223 | } |
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224 | |
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225 | return dupname; |
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226 | } |
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227 | |
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228 | /***************************************** |
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229 | Types with Associated XDR Routines |
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230 | *****************************************/ |
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231 | |
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232 | /* a string buffer with a maximal length. |
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233 | * If the buffer pointer is NULL, it is updated |
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234 | * with an appropriately allocated area. |
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235 | */ |
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236 | typedef struct strbuf { |
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237 | char *buf; |
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238 | u_int max; |
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239 | } strbuf; |
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240 | |
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241 | /* Read 'readlink' results into a 'strbuf'. |
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242 | * This is convenient as it avoids |
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243 | * one extra step of copying / lenght |
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244 | * checking. |
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245 | */ |
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246 | typedef struct readlinkres_strbuf { |
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247 | nfsstat status; |
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248 | strbuf strbuf; |
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249 | } readlinkres_strbuf; |
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250 | |
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251 | static bool_t |
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252 | xdr_readlinkres_strbuf(XDR *xdrs, readlinkres_strbuf *objp) |
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253 | { |
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254 | if ( !xdr_nfsstat(xdrs, &objp->status) ) |
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255 | return FALSE; |
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256 | |
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257 | if ( NFS_OK == objp->status ) { |
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258 | if ( !xdr_string(xdrs, &objp->strbuf.buf, objp->strbuf.max) ) |
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259 | return FALSE; |
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260 | } |
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261 | return TRUE; |
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262 | } |
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263 | |
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264 | |
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265 | /* DirInfoRec is used instead of dirresargs |
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266 | * to convert recursion into iteration. The |
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267 | * 'rpcgen'erated xdr_dirresargs ends up |
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268 | * doing nested calls when unpacking the |
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269 | * 'next' pointers. |
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270 | */ |
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271 | |
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272 | typedef struct DirInfoRec_ { |
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273 | readdirargs readdirargs; |
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274 | /* clone of the 'readdirres' fields; |
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275 | * the cookie is put into the readdirargs above |
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276 | */ |
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277 | nfsstat status; |
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278 | char *buf, *ptr; |
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279 | int len; |
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280 | bool_t eofreached; |
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281 | } DirInfoRec, *DirInfo; |
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282 | |
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283 | /* this deals with one entry / record */ |
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284 | static bool_t |
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285 | xdr_dir_info_entry(XDR *xdrs, DirInfo di) |
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286 | { |
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287 | union { |
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288 | char nambuf[NFS_MAXNAMLEN+1]; |
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289 | nfscookie cookie; |
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290 | } dummy; |
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291 | struct dirent *pde = (struct dirent *)di->ptr; |
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292 | u_int fileid; |
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293 | char *name; |
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294 | register int nlen = 0,len,naligned = 0; |
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295 | nfscookie *pcookie; |
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296 | |
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297 | len = di->len; |
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298 | |
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299 | if ( !xdr_u_int(xdrs, &fileid) ) |
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300 | return FALSE; |
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301 | |
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302 | /* we must pass the address of a char* */ |
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303 | name = (len > NFS_MAXNAMLEN) ? pde->d_name : dummy.nambuf; |
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304 | |
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305 | if ( !xdr_filename(xdrs, &name) ) { |
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306 | return FALSE; |
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307 | } |
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308 | |
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309 | if (len >= 0) { |
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310 | nlen = strlen(name); |
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311 | naligned = nlen + 1 /* string delimiter */ + 3 /* alignment */; |
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312 | naligned &= ~3; |
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313 | len -= naligned; |
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314 | } |
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315 | |
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316 | /* if the cookie goes into the DirInfo, we hope this doesn't fail |
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317 | * - the caller ends up with an invalid readdirargs cookie otherwise... |
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318 | */ |
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319 | pcookie = (len >= 0) ? &di->readdirargs.cookie : &dummy.cookie; |
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320 | if ( !xdr_nfscookie(xdrs, pcookie) ) { |
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321 | return FALSE; |
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322 | } |
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323 | |
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324 | di->len = len; |
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325 | /* adjust the buffer pointer */ |
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326 | if (len >= 0) { |
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327 | pde->d_ino = fileid; |
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328 | pde->d_namlen = nlen; |
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329 | pde->d_off = di->ptr - di->buf; |
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330 | if (name == dummy.nambuf) { |
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331 | memcpy(pde->d_name, dummy.nambuf, nlen + 1); |
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332 | } |
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333 | pde->d_reclen = DIRENT_HEADER_SIZE + naligned; |
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334 | di->ptr += pde->d_reclen; |
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335 | } |
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336 | |
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337 | return TRUE; |
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338 | } |
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339 | |
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340 | /* this routine loops over all entries */ |
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341 | static bool_t |
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342 | xdr_dir_info(XDR *xdrs, DirInfo di) |
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343 | { |
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344 | DirInfo dip; |
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345 | |
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346 | if ( !xdr_nfsstat(xdrs, &di->status) ) |
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347 | return FALSE; |
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348 | |
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349 | if ( NFS_OK != di->status ) |
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350 | return TRUE; |
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351 | |
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352 | dip = di; |
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353 | |
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354 | while (dip) { |
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355 | /* reserve space for the dirent 'header' - we assume it's word aligned! */ |
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356 | #ifdef DEBUG |
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357 | assert( DIRENT_HEADER_SIZE % 4 == 0 ); |
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358 | #endif |
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359 | dip->len -= DIRENT_HEADER_SIZE; |
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360 | |
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361 | /* we pass a 0 size - size is unused since |
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362 | * we always pass a non-NULL pointer |
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363 | */ |
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364 | if ( !xdr_pointer(xdrs, (void*)&dip, 0 /* size */, (xdrproc_t)xdr_dir_info_entry) ) |
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365 | return FALSE; |
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366 | } |
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367 | |
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368 | if ( ! xdr_bool(xdrs, &di->eofreached) ) |
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369 | return FALSE; |
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370 | |
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371 | /* if everything fits into the XDR buffer but not the user's buffer, |
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372 | * they must resume reading from where xdr_dir_info_entry() started |
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373 | * skipping and 'eofreached' needs to be adjusted |
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374 | */ |
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375 | if ( di->len < 0 && di->eofreached ) |
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376 | di->eofreached = FALSE; |
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377 | |
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378 | return TRUE; |
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379 | } |
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380 | |
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381 | |
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382 | /* a type better suited for node operations |
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383 | * than diropres. |
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384 | * fattr and fhs are swapped so parts of this |
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385 | * structure may be used as a diroparg which |
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386 | * is practical when looking up paths. |
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387 | */ |
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388 | |
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389 | /* Macro for accessing serporid fields |
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390 | */ |
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391 | #define SERP_ARGS(node) ((node)->serporid.serporid_u.serporid.arg_u) |
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392 | #define SERP_ATTR(node) ((node)->serporid.serporid_u.serporid.attributes) |
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393 | #define SERP_FILE(node) ((node)->serporid.serporid_u.serporid.file) |
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394 | |
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395 | |
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396 | typedef struct serporidok { |
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397 | fattr attributes; |
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398 | nfs_fh file; |
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399 | union { |
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400 | struct { |
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401 | filename name; |
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402 | } diroparg; |
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403 | struct { |
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404 | sattr attributes; |
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405 | } sattrarg; |
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406 | struct { |
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407 | uint32_t offset; |
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408 | uint32_t count; |
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409 | uint32_t totalcount; |
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410 | } readarg; |
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411 | struct { |
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412 | uint32_t beginoffset; |
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413 | uint32_t offset; |
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414 | uint32_t totalcount; |
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415 | struct { |
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416 | uint32_t data_len; |
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417 | char* data_val; |
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418 | } data; |
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419 | } writearg; |
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420 | struct { |
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421 | filename name; |
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422 | sattr attributes; |
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423 | } createarg; |
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424 | struct { |
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425 | filename name; |
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426 | diropargs to; |
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427 | } renamearg; |
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428 | struct { |
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429 | diropargs to; |
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430 | } linkarg; |
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431 | struct { |
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432 | filename name; |
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433 | nfspath to; |
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434 | sattr attributes; |
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435 | } symlinkarg; |
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436 | struct { |
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437 | nfscookie cookie; |
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438 | uint32_t count; |
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439 | } readdirarg; |
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440 | } arg_u; |
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441 | } serporidok; |
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442 | |
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443 | typedef struct serporid { |
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444 | nfsstat status; |
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445 | union { |
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446 | serporidok serporid; |
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447 | } serporid_u; |
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448 | } serporid; |
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449 | |
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450 | /* an XDR routine to encode/decode the inverted diropres |
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451 | * into an nfsnodestat; |
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452 | * |
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453 | * NOTE: this routine only acts on |
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454 | * - 'serporid.status' |
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455 | * - 'serporid.file' |
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456 | * - 'serporid.attributes' |
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457 | * and leaves the 'arg_u' alone. |
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458 | * |
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459 | * The idea is that a 'diropres' is read into 'serporid' |
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460 | * which can then be used as an argument to subsequent |
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461 | * NFS-RPCs (after filling in the node's arg_u). |
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462 | */ |
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463 | static bool_t |
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464 | xdr_serporidok(XDR *xdrs, serporidok *objp) |
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465 | { |
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466 | if (!xdr_nfs_fh (xdrs, &objp->file)) |
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467 | return FALSE; |
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468 | if (!xdr_fattr (xdrs, &objp->attributes)) |
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469 | return FALSE; |
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470 | return TRUE; |
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471 | } |
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472 | |
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473 | static bool_t |
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474 | xdr_serporid(XDR *xdrs, serporid *objp) |
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475 | { |
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476 | if (!xdr_nfsstat (xdrs, &objp->status)) |
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477 | return FALSE; |
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478 | switch (objp->status) { |
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479 | case NFS_OK: |
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480 | if (!xdr_serporidok(xdrs, &objp->serporid_u.serporid)) |
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481 | return FALSE; |
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482 | break; |
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483 | default: |
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484 | break; |
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485 | } |
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486 | return TRUE; |
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487 | } |
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488 | |
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489 | /***************************************** |
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490 | Data Structures and Types |
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491 | *****************************************/ |
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492 | |
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493 | /* 'time()' hack with less overhead; */ |
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494 | |
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495 | /* assume reading a long word is atomic */ |
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496 | #define READ_LONG_IS_ATOMIC |
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497 | |
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498 | typedef uint32_t TimeStamp; |
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499 | |
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500 | static inline TimeStamp |
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501 | nowSeconds(void) |
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502 | { |
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503 | rtems_interval rval; |
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504 | rtems_clock_get_seconds_since_epoch( &rval ); |
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505 | return rval; |
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506 | } |
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507 | |
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508 | |
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509 | /* Per mounted FS structure */ |
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510 | typedef struct NfsRec_ { |
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511 | /* the NFS server we're talking to. |
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512 | */ |
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513 | RpcUdpServer server; |
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514 | /* statistics; how many NfsNodes are |
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515 | * currently alive. |
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516 | */ |
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517 | volatile int nodesInUse; |
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518 | #if DEBUG & DEBUG_COUNT_NODES |
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519 | /* statistics; how many 'NfsNode.str' |
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520 | * strings are currently allocated. |
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521 | */ |
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522 | volatile int stringsInUse; |
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523 | #endif |
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524 | /* A small number who uniquely |
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525 | * identifies a mounted NFS within |
---|
526 | * this driver (i.e. this NfsRec). |
---|
527 | * Each time a NFS is mounted, the |
---|
528 | * global ID counter is incremented |
---|
529 | * and its value is assigned to the |
---|
530 | * newly created NfsRec. |
---|
531 | */ |
---|
532 | u_short id; |
---|
533 | /* Our RTEMS filesystem mt_entry |
---|
534 | */ |
---|
535 | rtems_filesystem_mount_table_entry_t *mt_entry; |
---|
536 | /* Next NfsRec on a linked list who |
---|
537 | * is anchored at nfsGlob |
---|
538 | */ |
---|
539 | struct NfsRec_ *next; |
---|
540 | /* Who we pretend we are |
---|
541 | */ |
---|
542 | u_long uid,gid; |
---|
543 | } NfsRec, *Nfs; |
---|
544 | |
---|
545 | typedef struct NfsNodeRec_ { |
---|
546 | /* This holds this node's attributes |
---|
547 | * (stats) and its nfs filehandle. |
---|
548 | * It also contains room for nfs rpc |
---|
549 | * arguments. |
---|
550 | */ |
---|
551 | serporid serporid; |
---|
552 | /* The arguments we used when doing |
---|
553 | * the 'lookup' call for this node. |
---|
554 | * We need this information (especially |
---|
555 | * the directory FH) for performing |
---|
556 | * certain operations on this |
---|
557 | * node (in particular: for unlinking |
---|
558 | * it from a parent directory) |
---|
559 | */ |
---|
560 | diropargs args; |
---|
561 | /* FS this node belongs to |
---|
562 | */ |
---|
563 | Nfs nfs; |
---|
564 | /* A buffer for the string the |
---|
565 | * args.name points to. |
---|
566 | * We need this because args.name might |
---|
567 | * temporarily point to strings on the |
---|
568 | * stack. Duplicates are allocated from |
---|
569 | * the heap and attached to 'str' so |
---|
570 | * they can be released as appropriate. |
---|
571 | */ |
---|
572 | char *str; |
---|
573 | /* A timestamp for the stats |
---|
574 | */ |
---|
575 | TimeStamp age; |
---|
576 | } NfsNodeRec, *NfsNode; |
---|
577 | |
---|
578 | /***************************************** |
---|
579 | Forward Declarations |
---|
580 | *****************************************/ |
---|
581 | |
---|
582 | static ssize_t nfs_readlink_with_node( |
---|
583 | NfsNode node, |
---|
584 | char *buf, |
---|
585 | size_t len |
---|
586 | ); |
---|
587 | |
---|
588 | static int updateAttr(NfsNode node, int force); |
---|
589 | |
---|
590 | /* Mask bits when setting attributes. |
---|
591 | * Only the 'arg' fields with their |
---|
592 | * corresponding bit set in the mask |
---|
593 | * will be used. The others are left |
---|
594 | * unchanged. |
---|
595 | * The 'TOUCH' bits instruct nfs_sattr() |
---|
596 | * to update the respective time |
---|
597 | * fields to the current time |
---|
598 | */ |
---|
599 | #define SATTR_MODE (1<<0) |
---|
600 | #define SATTR_UID (1<<1) |
---|
601 | #define SATTR_GID (1<<2) |
---|
602 | #define SATTR_SIZE (1<<3) |
---|
603 | #define SATTR_ATIME (1<<4) |
---|
604 | #define SATTR_TOUCHA (1<<5) |
---|
605 | #define SATTR_MTIME (1<<6) |
---|
606 | #define SATTR_TOUCHM (1<<7) |
---|
607 | #define SATTR_TOUCH (SATTR_TOUCHM | SATTR_TOUCHA) |
---|
608 | |
---|
609 | static int |
---|
610 | nfs_sattr(NfsNode node, sattr *arg, u_long mask); |
---|
611 | |
---|
612 | extern const struct _rtems_filesystem_operations_table nfs_fs_ops; |
---|
613 | static const struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers; |
---|
614 | static const struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers; |
---|
615 | static const struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers; |
---|
616 | static rtems_driver_address_table drvNfs; |
---|
617 | |
---|
618 | int |
---|
619 | nfsMountsShow(FILE*); |
---|
620 | |
---|
621 | rtems_status_code |
---|
622 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc); |
---|
623 | |
---|
624 | /***************************************** |
---|
625 | Global Variables |
---|
626 | *****************************************/ |
---|
627 | |
---|
628 | /* These are (except for MAXNAMLEN/MAXPATHLEN) copied from IMFS */ |
---|
629 | |
---|
630 | static const rtems_filesystem_limits_and_options_t |
---|
631 | nfs_limits_and_options = { |
---|
632 | 5, /* link_max */ |
---|
633 | 6, /* max_canon */ |
---|
634 | 7, /* max_input */ |
---|
635 | NFS_MAXNAMLEN, /* name_max */ |
---|
636 | NFS_MAXPATHLEN, /* path_max */ |
---|
637 | 2, /* pipe_buf */ |
---|
638 | 1, /* posix_async_io */ |
---|
639 | 2, /* posix_chown_restrictions */ |
---|
640 | 3, /* posix_no_trunc */ |
---|
641 | 4, /* posix_prio_io */ |
---|
642 | 5, /* posix_sync_io */ |
---|
643 | 6 /* posix_vdisable */ |
---|
644 | }; |
---|
645 | |
---|
646 | /* size of an encoded 'entry' object */ |
---|
647 | static int dirres_entry_size; |
---|
648 | |
---|
649 | /* Global stuff and statistics */ |
---|
650 | static struct nfsstats { |
---|
651 | /* A lock for protecting the |
---|
652 | * linked ist of mounted NFS |
---|
653 | * and the num_mounted_fs field |
---|
654 | */ |
---|
655 | rtems_id llock; |
---|
656 | /* A lock for protecting misc |
---|
657 | * stuff within the driver. |
---|
658 | * The lock must only be held |
---|
659 | * for short periods of time. |
---|
660 | */ |
---|
661 | rtems_id lock; |
---|
662 | /* Our major number as assigned |
---|
663 | * by RTEMS |
---|
664 | */ |
---|
665 | rtems_device_major_number nfs_major; |
---|
666 | /* The number of currently |
---|
667 | * mounted NFS |
---|
668 | */ |
---|
669 | int num_mounted_fs; |
---|
670 | /* A list of the currently |
---|
671 | * mounted NFS |
---|
672 | */ |
---|
673 | struct NfsRec_ *mounted_fs; |
---|
674 | /* A counter for allocating |
---|
675 | * unique IDs to each mounted |
---|
676 | * NFS. |
---|
677 | * Assume we are not going to |
---|
678 | * do more than 16k mounts |
---|
679 | * during the system lifetime |
---|
680 | */ |
---|
681 | u_short fs_ids; |
---|
682 | |
---|
683 | /* Two pools of RPC transactions; |
---|
684 | * One with small send buffers |
---|
685 | * the other with a big one. |
---|
686 | * The actual size of the small |
---|
687 | * buffer is configurable (see top). |
---|
688 | * |
---|
689 | * Note: The RX buffers are always |
---|
690 | * big |
---|
691 | */ |
---|
692 | RpcUdpXactPool smallPool; |
---|
693 | RpcUdpXactPool bigPool; |
---|
694 | } nfsGlob = {0, 0, 0xffffffff, 0, 0, 0, NULL, NULL}; |
---|
695 | |
---|
696 | /* |
---|
697 | * Global variable to tune the 'st_blksize' (stat(2)) value this nfs |
---|
698 | * client should report. |
---|
699 | * size on the server. |
---|
700 | */ |
---|
701 | #ifndef DEFAULT_NFS_ST_BLKSIZE |
---|
702 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
---|
703 | #endif |
---|
704 | int nfsStBlksize = DEFAULT_NFS_ST_BLKSIZE; |
---|
705 | |
---|
706 | |
---|
707 | /***************************************** |
---|
708 | Implementation |
---|
709 | *****************************************/ |
---|
710 | |
---|
711 | static int nfsEvaluateStatus(nfsstat nfsStatus) |
---|
712 | { |
---|
713 | static const uint8_t nfsStatusToErrno [71] = { |
---|
714 | [NFS_OK] = 0, |
---|
715 | [NFSERR_PERM] = EPERM, |
---|
716 | [NFSERR_NOENT] = ENOENT, |
---|
717 | [3] = EIO, |
---|
718 | [4] = EIO, |
---|
719 | [NFSERR_IO] = EIO, |
---|
720 | [NFSERR_NXIO] = ENXIO, |
---|
721 | [7] = EIO, |
---|
722 | [8] = EIO, |
---|
723 | [9] = EIO, |
---|
724 | [10] = EIO, |
---|
725 | [11] = EIO, |
---|
726 | [12] = EIO, |
---|
727 | [NFSERR_ACCES] = EACCES, |
---|
728 | [14] = EIO, |
---|
729 | [15] = EIO, |
---|
730 | [16] = EIO, |
---|
731 | [NFSERR_EXIST] = EEXIST, |
---|
732 | [18] = EIO, |
---|
733 | [NFSERR_NODEV] = ENODEV, |
---|
734 | [NFSERR_NOTDIR] = ENOTDIR, |
---|
735 | [NFSERR_ISDIR] = EISDIR, |
---|
736 | [22] = EIO, |
---|
737 | [24] = EIO, |
---|
738 | [25] = EIO, |
---|
739 | [26] = EIO, |
---|
740 | [27] = EIO, |
---|
741 | [NFSERR_FBIG] = EFBIG, |
---|
742 | [NFSERR_NOSPC] = ENOSPC, |
---|
743 | [29] = EIO, |
---|
744 | [NFSERR_ROFS] = EROFS, |
---|
745 | [31] = EIO, |
---|
746 | [32] = EIO, |
---|
747 | [34] = EIO, |
---|
748 | [35] = EIO, |
---|
749 | [36] = EIO, |
---|
750 | [37] = EIO, |
---|
751 | [38] = EIO, |
---|
752 | [39] = EIO, |
---|
753 | [40] = EIO, |
---|
754 | [41] = EIO, |
---|
755 | [42] = EIO, |
---|
756 | [44] = EIO, |
---|
757 | [45] = EIO, |
---|
758 | [46] = EIO, |
---|
759 | [47] = EIO, |
---|
760 | [48] = EIO, |
---|
761 | [49] = EIO, |
---|
762 | [50] = EIO, |
---|
763 | [51] = EIO, |
---|
764 | [52] = EIO, |
---|
765 | [54] = EIO, |
---|
766 | [55] = EIO, |
---|
767 | [56] = EIO, |
---|
768 | [57] = EIO, |
---|
769 | [58] = EIO, |
---|
770 | [59] = EIO, |
---|
771 | [60] = EIO, |
---|
772 | [61] = EIO, |
---|
773 | [62] = EIO, |
---|
774 | [NFSERR_NAMETOOLONG] = ENAMETOOLONG, |
---|
775 | [64] = EIO, |
---|
776 | [65] = EIO, |
---|
777 | [NFSERR_NOTEMPTY] = ENOTEMPTY, |
---|
778 | [67] = EIO, |
---|
779 | [68] = EIO, |
---|
780 | [NFSERR_DQUOT] = EDQUOT, |
---|
781 | [NFSERR_STALE] = ESTALE |
---|
782 | }; |
---|
783 | |
---|
784 | size_t idx = (size_t) nfsStatus; |
---|
785 | int eno = EIO; |
---|
786 | int rv = 0; |
---|
787 | |
---|
788 | if (idx < sizeof(nfsStatusToErrno) / sizeof(nfsStatusToErrno [0])) { |
---|
789 | eno = nfsStatusToErrno [idx]; |
---|
790 | } |
---|
791 | |
---|
792 | if (eno != 0) { |
---|
793 | errno = eno; |
---|
794 | rv = -1; |
---|
795 | } |
---|
796 | |
---|
797 | return rv; |
---|
798 | } |
---|
799 | |
---|
800 | /* Create a Nfs object. This is |
---|
801 | * per-mounted NFS information. |
---|
802 | * |
---|
803 | * ARGS: The Nfs server handle. |
---|
804 | * |
---|
805 | * RETURNS: Nfs on success, |
---|
806 | * NULL on failure with |
---|
807 | * errno set |
---|
808 | * |
---|
809 | * NOTE: The submitted server |
---|
810 | * object is 'owned' by |
---|
811 | * this Nfs and will be |
---|
812 | * destroyed by nfsDestroy() |
---|
813 | */ |
---|
814 | static Nfs |
---|
815 | nfsCreate(RpcUdpServer server) |
---|
816 | { |
---|
817 | Nfs rval = calloc(1,sizeof(*rval)); |
---|
818 | |
---|
819 | if (rval) { |
---|
820 | rval->server = server; |
---|
821 | LOCK(nfsGlob.llock); |
---|
822 | rval->next = nfsGlob.mounted_fs; |
---|
823 | nfsGlob.mounted_fs = rval; |
---|
824 | UNLOCK(nfsGlob.llock); |
---|
825 | } else { |
---|
826 | errno = ENOMEM; |
---|
827 | } |
---|
828 | return rval; |
---|
829 | } |
---|
830 | |
---|
831 | /* Destroy an Nfs object and |
---|
832 | * its associated server |
---|
833 | */ |
---|
834 | static void |
---|
835 | nfsDestroy(Nfs nfs) |
---|
836 | { |
---|
837 | register Nfs prev; |
---|
838 | if (!nfs) |
---|
839 | return; |
---|
840 | |
---|
841 | LOCK(nfsGlob.llock); |
---|
842 | if (nfs == nfsGlob.mounted_fs) |
---|
843 | nfsGlob.mounted_fs = nfs->next; |
---|
844 | else { |
---|
845 | for (prev = nfsGlob.mounted_fs; |
---|
846 | prev && prev->next != nfs; |
---|
847 | prev = prev->next) |
---|
848 | /* nothing else to do */; |
---|
849 | assert( prev ); |
---|
850 | prev->next = nfs->next; |
---|
851 | } |
---|
852 | UNLOCK(nfsGlob.llock); |
---|
853 | |
---|
854 | nfs->next = 0; /* paranoia */ |
---|
855 | rpcUdpServerDestroy(nfs->server); |
---|
856 | free(nfs); |
---|
857 | } |
---|
858 | |
---|
859 | /* |
---|
860 | * Create a Node. The node will |
---|
861 | * be associated with a particular |
---|
862 | * mounted NFS identified by 'nfs' |
---|
863 | * Optionally, a NFS file handle |
---|
864 | * may be copied into this node. |
---|
865 | * |
---|
866 | * ARGS: nfs of the NFS this node |
---|
867 | * belongs to. |
---|
868 | * NFS file handle identifying |
---|
869 | * this node. |
---|
870 | * RETURNS: node on success, |
---|
871 | * NULL on failure with errno |
---|
872 | * set. |
---|
873 | * |
---|
874 | * NOTE: The caller of this routine |
---|
875 | * is responsible for copying |
---|
876 | * a NFS file handle if she |
---|
877 | * choses to pass a NULL fh. |
---|
878 | * |
---|
879 | * The driver code assumes the |
---|
880 | * a node always has a valid |
---|
881 | * NFS filehandle and file |
---|
882 | * attributes (unless the latter |
---|
883 | * are aged). |
---|
884 | */ |
---|
885 | static NfsNode |
---|
886 | nfsNodeCreate(Nfs nfs, fhandle *fh) |
---|
887 | { |
---|
888 | NfsNode rval = malloc(sizeof(*rval)); |
---|
889 | unsigned long flags; |
---|
890 | |
---|
891 | #if DEBUG & DEBUG_TRACK_NODES |
---|
892 | fprintf(stderr,"NFS: creating a node\n"); |
---|
893 | #endif |
---|
894 | |
---|
895 | if (rval) { |
---|
896 | if (fh) |
---|
897 | memcpy( &SERP_FILE(rval), fh, sizeof(*fh) ); |
---|
898 | rtems_interrupt_disable(flags); |
---|
899 | nfs->nodesInUse++; |
---|
900 | rtems_interrupt_enable(flags); |
---|
901 | rval->nfs = nfs; |
---|
902 | rval->str = 0; |
---|
903 | } else { |
---|
904 | errno = ENOMEM; |
---|
905 | } |
---|
906 | |
---|
907 | return rval; |
---|
908 | } |
---|
909 | |
---|
910 | /* destroy a node */ |
---|
911 | static void |
---|
912 | nfsNodeDestroy(NfsNode node) |
---|
913 | { |
---|
914 | unsigned long flags; |
---|
915 | |
---|
916 | #if DEBUG & DEBUG_TRACK_NODES |
---|
917 | fprintf(stderr,"NFS: destroying a node\n"); |
---|
918 | #endif |
---|
919 | #if 0 |
---|
920 | if (!node) |
---|
921 | return; |
---|
922 | /* this probably does nothing... */ |
---|
923 | xdr_free(xdr_serporid, &node->serporid); |
---|
924 | #endif |
---|
925 | |
---|
926 | rtems_interrupt_disable(flags); |
---|
927 | node->nfs->nodesInUse--; |
---|
928 | #if DEBUG & DEBUG_COUNT_NODES |
---|
929 | if (node->str) |
---|
930 | node->nfs->stringsInUse--; |
---|
931 | #endif |
---|
932 | rtems_interrupt_enable(flags); |
---|
933 | |
---|
934 | if (node->str) |
---|
935 | free(node->str); |
---|
936 | |
---|
937 | free(node); |
---|
938 | } |
---|
939 | |
---|
940 | /* Clone a given node (AKA copy constructor), |
---|
941 | * i.e. create an exact copy. |
---|
942 | * |
---|
943 | * ARGS: node to clone |
---|
944 | * RETURNS: new node on success |
---|
945 | * NULL on failure with errno set. |
---|
946 | * |
---|
947 | * NOTE: a string attached to 'str' |
---|
948 | * is cloned as well. Outdated |
---|
949 | * attributes (of the new copy |
---|
950 | * only) will be refreshed |
---|
951 | * (if unsuccessful, this could |
---|
952 | * be a reason for failure to |
---|
953 | * clone a node). |
---|
954 | */ |
---|
955 | static NfsNode |
---|
956 | nfsNodeClone(NfsNode node) |
---|
957 | { |
---|
958 | NfsNode rval = nfsNodeCreate(node->nfs, 0); |
---|
959 | |
---|
960 | if (rval) { |
---|
961 | *rval = *node; |
---|
962 | |
---|
963 | /* must clone the string also */ |
---|
964 | if (node->str) { |
---|
965 | rval->args.name = rval->str = strdup(node->str); |
---|
966 | if (!rval->str) { |
---|
967 | errno = ENOMEM; |
---|
968 | nfsNodeDestroy(rval); |
---|
969 | return 0; |
---|
970 | } |
---|
971 | #if DEBUG & DEBUG_COUNT_NODES |
---|
972 | { unsigned long flags; |
---|
973 | rtems_interrupt_disable(flags); |
---|
974 | node->nfs->stringsInUse++; |
---|
975 | rtems_interrupt_enable(flags); |
---|
976 | } |
---|
977 | #endif |
---|
978 | } |
---|
979 | |
---|
980 | /* possibly update the stats */ |
---|
981 | if (updateAttr(rval, 0 /* only if necessary */)) { |
---|
982 | nfsNodeDestroy(rval); |
---|
983 | return 0; |
---|
984 | } |
---|
985 | } |
---|
986 | return rval; |
---|
987 | } |
---|
988 | |
---|
989 | /* Initialize the driver. |
---|
990 | * |
---|
991 | * ARGS: depth of the small and big |
---|
992 | * transaction pools, i.e. how |
---|
993 | * many transactions (buffers) |
---|
994 | * should always be kept around. |
---|
995 | * |
---|
996 | * (If more transactions are needed, |
---|
997 | * they are created and destroyed |
---|
998 | * on the fly). |
---|
999 | */ |
---|
1000 | int |
---|
1001 | nfsInit(int smallPoolDepth, int bigPoolDepth) |
---|
1002 | { |
---|
1003 | static int initialised = 0; |
---|
1004 | entry dummy; |
---|
1005 | rtems_status_code status; |
---|
1006 | |
---|
1007 | if (initialised) |
---|
1008 | return 0; |
---|
1009 | |
---|
1010 | initialised = 1; |
---|
1011 | |
---|
1012 | fprintf(stderr, |
---|
1013 | "RTEMS-NFS $Release$, " \ |
---|
1014 | "Till Straumann, Stanford/SLAC/SSRL 2002, " \ |
---|
1015 | "See LICENSE file for licensing info.\n"); |
---|
1016 | |
---|
1017 | /* Get a major number */ |
---|
1018 | |
---|
1019 | if (RTEMS_SUCCESSFUL != rtems_io_register_driver(0, &drvNfs, &nfsGlob.nfs_major)) { |
---|
1020 | fprintf(stderr,"Registering NFS driver failed - %s\n", strerror(errno)); |
---|
1021 | errno = ENOMEM; |
---|
1022 | return -1; |
---|
1023 | } |
---|
1024 | |
---|
1025 | if (0==smallPoolDepth) |
---|
1026 | smallPoolDepth = 20; |
---|
1027 | if (0==bigPoolDepth) |
---|
1028 | bigPoolDepth = 10; |
---|
1029 | |
---|
1030 | /* it's crucial to zero out the 'next' pointer |
---|
1031 | * because it terminates the xdr_entry recursion |
---|
1032 | * |
---|
1033 | * we also must make the filename some non-zero |
---|
1034 | * char pointer! |
---|
1035 | */ |
---|
1036 | |
---|
1037 | memset(&dummy, 0, sizeof(dummy)); |
---|
1038 | |
---|
1039 | dummy.nextentry = 0; |
---|
1040 | dummy.name = "somename"; /* guess average length of a filename */ |
---|
1041 | dirres_entry_size = xdr_sizeof((xdrproc_t)xdr_entry, &dummy); |
---|
1042 | |
---|
1043 | nfsGlob.smallPool = rpcUdpXactPoolCreate( |
---|
1044 | NFS_PROGRAM, |
---|
1045 | NFS_VERSION_2, |
---|
1046 | CONFIG_NFS_SMALL_XACT_SIZE, |
---|
1047 | smallPoolDepth); |
---|
1048 | if (nfsGlob.smallPool == NULL) { |
---|
1049 | goto cleanup; |
---|
1050 | } |
---|
1051 | |
---|
1052 | nfsGlob.bigPool = rpcUdpXactPoolCreate( |
---|
1053 | NFS_PROGRAM, |
---|
1054 | NFS_VERSION_2, |
---|
1055 | CONFIG_NFS_BIG_XACT_SIZE, |
---|
1056 | bigPoolDepth); |
---|
1057 | if (nfsGlob.bigPool == NULL) { |
---|
1058 | goto cleanup; |
---|
1059 | } |
---|
1060 | |
---|
1061 | status = rtems_semaphore_create( |
---|
1062 | rtems_build_name('N','F','S','l'), |
---|
1063 | 1, |
---|
1064 | MUTEX_ATTRIBUTES, |
---|
1065 | 0, |
---|
1066 | &nfsGlob.llock); |
---|
1067 | if (status != RTEMS_SUCCESSFUL) { |
---|
1068 | goto cleanup; |
---|
1069 | } |
---|
1070 | |
---|
1071 | status = rtems_semaphore_create( |
---|
1072 | rtems_build_name('N','F','S','m'), |
---|
1073 | 1, |
---|
1074 | MUTEX_ATTRIBUTES, |
---|
1075 | 0, |
---|
1076 | &nfsGlob.lock); |
---|
1077 | if (status != RTEMS_SUCCESSFUL) { |
---|
1078 | goto cleanup; |
---|
1079 | } |
---|
1080 | |
---|
1081 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
1082 | fprintf(stderr, |
---|
1083 | "WARNING: Using 'short st_ino' hits performance and may fail to access/find correct files\n"); |
---|
1084 | fprintf(stderr, |
---|
1085 | "you should fix newlib's sys/stat.h - for now I'll enable a hack...\n"); |
---|
1086 | |
---|
1087 | } |
---|
1088 | |
---|
1089 | return 0; |
---|
1090 | |
---|
1091 | cleanup: |
---|
1092 | |
---|
1093 | nfsCleanup(); |
---|
1094 | initialised = 0; |
---|
1095 | |
---|
1096 | return -1; |
---|
1097 | } |
---|
1098 | |
---|
1099 | /* Driver cleanup code |
---|
1100 | */ |
---|
1101 | int |
---|
1102 | nfsCleanup(void) |
---|
1103 | { |
---|
1104 | int refuse; |
---|
1105 | |
---|
1106 | if (nfsGlob.llock != 0) { |
---|
1107 | LOCK(nfsGlob.llock); |
---|
1108 | if ( (refuse = nfsGlob.num_mounted_fs) ) { |
---|
1109 | fprintf(stderr,"Refuse to unload NFS; %i filesystems still mounted.\n", |
---|
1110 | refuse); |
---|
1111 | nfsMountsShow(stderr); |
---|
1112 | /* yes, printing is slow - but since you try to unload the driver, |
---|
1113 | * you assume nobody is using NFS, so what if they have to wait? |
---|
1114 | */ |
---|
1115 | UNLOCK(nfsGlob.llock); |
---|
1116 | return -1; |
---|
1117 | } |
---|
1118 | } |
---|
1119 | |
---|
1120 | if (nfsGlob.lock != 0) { |
---|
1121 | rtems_semaphore_delete(nfsGlob.lock); |
---|
1122 | nfsGlob.lock = 0; |
---|
1123 | } |
---|
1124 | |
---|
1125 | if (nfsGlob.smallPool != NULL) { |
---|
1126 | rpcUdpXactPoolDestroy(nfsGlob.smallPool); |
---|
1127 | nfsGlob.smallPool = NULL; |
---|
1128 | } |
---|
1129 | |
---|
1130 | if (nfsGlob.bigPool != NULL) { |
---|
1131 | rpcUdpXactPoolDestroy(nfsGlob.bigPool); |
---|
1132 | nfsGlob.bigPool = NULL; |
---|
1133 | } |
---|
1134 | |
---|
1135 | if (nfsGlob.nfs_major != 0xffffffff) { |
---|
1136 | rtems_io_unregister_driver(nfsGlob.nfs_major); |
---|
1137 | nfsGlob.nfs_major = 0xffffffff; |
---|
1138 | } |
---|
1139 | |
---|
1140 | if (nfsGlob.llock != 0) { |
---|
1141 | rtems_semaphore_delete(nfsGlob.llock); |
---|
1142 | nfsGlob.llock = 0; |
---|
1143 | } |
---|
1144 | |
---|
1145 | return 0; |
---|
1146 | } |
---|
1147 | |
---|
1148 | /* NFS RPC wrapper. |
---|
1149 | * |
---|
1150 | * ARGS: srvr the NFS server we want to call |
---|
1151 | * proc the NFSPROC_xx we want to invoke |
---|
1152 | * xargs xdr routine to wrap the arguments |
---|
1153 | * pargs pointer to the argument object |
---|
1154 | * xres xdr routine to unwrap the results |
---|
1155 | * pres pointer to the result object |
---|
1156 | * |
---|
1157 | * RETURNS: 0 on success, -1 on error with errno set. |
---|
1158 | * |
---|
1159 | * NOTE: the caller assumes that errno is set to |
---|
1160 | * a nonzero value if this routine returns |
---|
1161 | * an error (nonzero return value). |
---|
1162 | * |
---|
1163 | * This routine prints RPC error messages to |
---|
1164 | * stderr. |
---|
1165 | */ |
---|
1166 | STATIC int |
---|
1167 | nfscall( |
---|
1168 | RpcUdpServer srvr, |
---|
1169 | int proc, |
---|
1170 | xdrproc_t xargs, |
---|
1171 | void * pargs, |
---|
1172 | xdrproc_t xres, |
---|
1173 | void * pres) |
---|
1174 | { |
---|
1175 | RpcUdpXact xact; |
---|
1176 | enum clnt_stat stat; |
---|
1177 | RpcUdpXactPool pool; |
---|
1178 | int rval = -1; |
---|
1179 | |
---|
1180 | |
---|
1181 | switch (proc) { |
---|
1182 | case NFSPROC_SYMLINK: |
---|
1183 | case NFSPROC_WRITE: |
---|
1184 | pool = nfsGlob.bigPool; break; |
---|
1185 | default: pool = nfsGlob.smallPool; break; |
---|
1186 | } |
---|
1187 | |
---|
1188 | xact = rpcUdpXactPoolGet(pool, XactGetCreate); |
---|
1189 | |
---|
1190 | if ( !xact ) { |
---|
1191 | errno = ENOMEM; |
---|
1192 | return -1; |
---|
1193 | } |
---|
1194 | |
---|
1195 | if ( RPC_SUCCESS != (stat=rpcUdpSend( |
---|
1196 | xact, |
---|
1197 | srvr, |
---|
1198 | NFSCALL_TIMEOUT, |
---|
1199 | proc, |
---|
1200 | xres, |
---|
1201 | pres, |
---|
1202 | xargs, |
---|
1203 | pargs, |
---|
1204 | 0)) || |
---|
1205 | RPC_SUCCESS != (stat=rpcUdpRcv(xact)) ) { |
---|
1206 | |
---|
1207 | fprintf(stderr, |
---|
1208 | "NFS (proc %i) - %s\n", |
---|
1209 | proc, |
---|
1210 | clnt_sperrno(stat)); |
---|
1211 | |
---|
1212 | switch (stat) { |
---|
1213 | /* TODO: this is probably not complete and/or fully accurate */ |
---|
1214 | case RPC_CANTENCODEARGS : errno = EINVAL; break; |
---|
1215 | case RPC_AUTHERROR : errno = EPERM; break; |
---|
1216 | |
---|
1217 | case RPC_CANTSEND : |
---|
1218 | case RPC_CANTRECV : /* hope they have errno set */ |
---|
1219 | case RPC_SYSTEMERROR : break; |
---|
1220 | |
---|
1221 | default : errno = EIO; break; |
---|
1222 | } |
---|
1223 | } else { |
---|
1224 | rval = 0; |
---|
1225 | } |
---|
1226 | |
---|
1227 | /* release the transaction back into the pool */ |
---|
1228 | rpcUdpXactPoolPut(xact); |
---|
1229 | |
---|
1230 | if (rval && !errno) |
---|
1231 | errno = EIO; |
---|
1232 | |
---|
1233 | return rval; |
---|
1234 | } |
---|
1235 | |
---|
1236 | /* Check the 'age' of a node's stats |
---|
1237 | * and read the attributes from the server |
---|
1238 | * if necessary. |
---|
1239 | * |
---|
1240 | * ARGS: node node to update |
---|
1241 | * force enforce updating ignoring |
---|
1242 | * the timestamp/age |
---|
1243 | * |
---|
1244 | * RETURNS: 0 on success, |
---|
1245 | * -1 on failure with errno set |
---|
1246 | */ |
---|
1247 | |
---|
1248 | static int |
---|
1249 | updateAttr(NfsNode node, int force) |
---|
1250 | { |
---|
1251 | int rv = 0; |
---|
1252 | |
---|
1253 | if (force |
---|
1254 | #ifdef CONFIG_ATTR_LIFETIME |
---|
1255 | || (nowSeconds() - node->age > CONFIG_ATTR_LIFETIME) |
---|
1256 | #endif |
---|
1257 | ) { |
---|
1258 | rv = nfscall( |
---|
1259 | node->nfs->server, |
---|
1260 | NFSPROC_GETATTR, |
---|
1261 | (xdrproc_t) xdr_nfs_fh, &SERP_FILE(node), |
---|
1262 | (xdrproc_t) xdr_attrstat, &node->serporid |
---|
1263 | ); |
---|
1264 | |
---|
1265 | if (rv == 0) { |
---|
1266 | rv = nfsEvaluateStatus(node->serporid.status); |
---|
1267 | |
---|
1268 | if (rv == 0) { |
---|
1269 | node->age = nowSeconds(); |
---|
1270 | } |
---|
1271 | } |
---|
1272 | } |
---|
1273 | |
---|
1274 | return rv; |
---|
1275 | } |
---|
1276 | |
---|
1277 | /* |
---|
1278 | * IP address helper. |
---|
1279 | * |
---|
1280 | * initialize a sockaddr_in from a |
---|
1281 | * [<uid>'.'<gid>'@']<host>':'<path>" string and let |
---|
1282 | * pPath point to the <path> part; retrieve the optional |
---|
1283 | * uid/gids |
---|
1284 | * |
---|
1285 | * ARGS: see description above |
---|
1286 | * |
---|
1287 | * RETURNS: 0 on success, |
---|
1288 | * -1 on failure with errno set |
---|
1289 | */ |
---|
1290 | static int |
---|
1291 | buildIpAddr(u_long *puid, u_long *pgid, |
---|
1292 | char **pHost, struct sockaddr_in *psa, |
---|
1293 | char **pPath) |
---|
1294 | { |
---|
1295 | struct hostent *h; |
---|
1296 | char host[64]; |
---|
1297 | char *chpt = *pPath; |
---|
1298 | char *path; |
---|
1299 | int len; |
---|
1300 | |
---|
1301 | if ( !chpt ) { |
---|
1302 | errno = EINVAL; |
---|
1303 | return -1; |
---|
1304 | } |
---|
1305 | |
---|
1306 | /* look for the optional uid/gid */ |
---|
1307 | if ( (chpt = strchr(chpt, UIDSEP)) ) { |
---|
1308 | if ( 2 != sscanf(*pPath,"%li.%li",puid,pgid) ) { |
---|
1309 | errno = EINVAL; |
---|
1310 | return -1; |
---|
1311 | } |
---|
1312 | chpt++; |
---|
1313 | } else { |
---|
1314 | *puid = geteuid(); |
---|
1315 | *pgid = getegid(); |
---|
1316 | chpt = *pPath; |
---|
1317 | } |
---|
1318 | if ( pHost ) |
---|
1319 | *pHost = chpt; |
---|
1320 | |
---|
1321 | /* split the device name which is in the form |
---|
1322 | * |
---|
1323 | * <host> ':' <path> |
---|
1324 | * |
---|
1325 | * into its components using a local buffer |
---|
1326 | */ |
---|
1327 | |
---|
1328 | if ( !(path = strchr(chpt, HOSTDELIM)) || |
---|
1329 | (len = path - chpt) >= sizeof(host) - 1 ) { |
---|
1330 | errno = EINVAL; |
---|
1331 | return -1; |
---|
1332 | } |
---|
1333 | /* point to path beyond ':' */ |
---|
1334 | path++; |
---|
1335 | |
---|
1336 | strncpy(host, chpt, len); |
---|
1337 | host[len]=0; |
---|
1338 | |
---|
1339 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
1340 | |
---|
1341 | h = gethostbyname(host); |
---|
1342 | |
---|
1343 | if ( !h ) { |
---|
1344 | errno = EINVAL; |
---|
1345 | return -1; |
---|
1346 | } |
---|
1347 | |
---|
1348 | memcpy(&psa->sin_addr, h->h_addr, sizeof (struct in_addr)); |
---|
1349 | |
---|
1350 | /* END OF NON-THREAD SAFE REGION */ |
---|
1351 | |
---|
1352 | psa->sin_family = AF_INET; |
---|
1353 | psa->sin_port = 0; |
---|
1354 | *pPath = path; |
---|
1355 | return 0; |
---|
1356 | } |
---|
1357 | |
---|
1358 | /* wrapper similar to nfscall. |
---|
1359 | * However, since it is not used |
---|
1360 | * very often, the simpler and less |
---|
1361 | * efficient rpcUdpCallRp API is used. |
---|
1362 | * |
---|
1363 | * ARGS: see 'nfscall()' above |
---|
1364 | * |
---|
1365 | * RETURNS: RPC status |
---|
1366 | */ |
---|
1367 | static enum clnt_stat |
---|
1368 | mntcall( |
---|
1369 | struct sockaddr_in *psrvr, |
---|
1370 | int proc, |
---|
1371 | xdrproc_t xargs, |
---|
1372 | void * pargs, |
---|
1373 | xdrproc_t xres, |
---|
1374 | void * pres, |
---|
1375 | u_long uid, |
---|
1376 | u_long gid) |
---|
1377 | { |
---|
1378 | #ifdef MOUNT_V1_PORT |
---|
1379 | int retry; |
---|
1380 | #endif |
---|
1381 | enum clnt_stat stat = RPC_FAILED; |
---|
1382 | |
---|
1383 | #ifdef MOUNT_V1_PORT |
---|
1384 | /* if the portmapper fails, retry a fixed port */ |
---|
1385 | for (retry = 1, psrvr->sin_port = 0, stat = RPC_FAILED; |
---|
1386 | retry >= 0 && stat; |
---|
1387 | stat && (psrvr->sin_port = htons(MOUNT_V1_PORT)), retry-- ) |
---|
1388 | #endif |
---|
1389 | stat = rpcUdpCallRp( |
---|
1390 | psrvr, |
---|
1391 | MOUNTPROG, |
---|
1392 | MOUNTVERS, |
---|
1393 | proc, |
---|
1394 | xargs, |
---|
1395 | pargs, |
---|
1396 | xres, |
---|
1397 | pres, |
---|
1398 | uid, |
---|
1399 | gid, |
---|
1400 | MNTCALL_TIMEOUT |
---|
1401 | ); |
---|
1402 | return stat; |
---|
1403 | } |
---|
1404 | |
---|
1405 | /***************************************** |
---|
1406 | RTEMS File System Operations for NFS |
---|
1407 | *****************************************/ |
---|
1408 | |
---|
1409 | static bool nfs_is_directory( |
---|
1410 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1411 | void *arg |
---|
1412 | ) |
---|
1413 | { |
---|
1414 | bool is_dir = false; |
---|
1415 | rtems_filesystem_location_info_t *currentloc = |
---|
1416 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1417 | NfsNode node = currentloc->node_access; |
---|
1418 | int force_update = 0; |
---|
1419 | |
---|
1420 | if (updateAttr(node, force_update) == 0) { |
---|
1421 | is_dir = SERP_ATTR(node).type == NFDIR; |
---|
1422 | } |
---|
1423 | |
---|
1424 | return is_dir; |
---|
1425 | } |
---|
1426 | |
---|
1427 | static int nfs_search_in_directory( |
---|
1428 | Nfs nfs, |
---|
1429 | const NfsNode dir, |
---|
1430 | char *part, |
---|
1431 | NfsNode entry |
---|
1432 | ) |
---|
1433 | { |
---|
1434 | int rv; |
---|
1435 | |
---|
1436 | entry->nfs = nfs; |
---|
1437 | |
---|
1438 | /* lookup one element */ |
---|
1439 | SERP_ATTR(entry) = SERP_ATTR(dir); |
---|
1440 | SERP_FILE(entry) = SERP_FILE(dir); |
---|
1441 | SERP_ARGS(entry).diroparg.name = part; |
---|
1442 | |
---|
1443 | /* remember args / directory fh */ |
---|
1444 | memcpy(&entry->args, &SERP_FILE(dir), sizeof(dir->args)); |
---|
1445 | |
---|
1446 | #if DEBUG & DEBUG_EVALPATH |
---|
1447 | fprintf(stderr,"Looking up '%s'\n",part); |
---|
1448 | #endif |
---|
1449 | |
---|
1450 | rv = nfscall( |
---|
1451 | nfs->server, |
---|
1452 | NFSPROC_LOOKUP, |
---|
1453 | (xdrproc_t) xdr_diropargs, &SERP_FILE(entry), |
---|
1454 | (xdrproc_t) xdr_serporid, &entry->serporid |
---|
1455 | ); |
---|
1456 | |
---|
1457 | if (rv == 0 && entry->serporid.status == NFS_OK) { |
---|
1458 | int force_update = 1; |
---|
1459 | |
---|
1460 | rv = updateAttr(entry, force_update); |
---|
1461 | } else { |
---|
1462 | rv = -1; |
---|
1463 | } |
---|
1464 | |
---|
1465 | return rv; |
---|
1466 | } |
---|
1467 | |
---|
1468 | static void nfs_eval_follow_link( |
---|
1469 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1470 | NfsNode link |
---|
1471 | ) |
---|
1472 | { |
---|
1473 | const size_t len = NFS_MAXPATHLEN + 1; |
---|
1474 | char *buf = malloc(len); |
---|
1475 | |
---|
1476 | if (buf != NULL) { |
---|
1477 | ssize_t rv = nfs_readlink_with_node(link, buf, len); |
---|
1478 | |
---|
1479 | if (rv >= 0) { |
---|
1480 | rtems_filesystem_eval_path_recursive(ctx, buf, (size_t) rv); |
---|
1481 | } else { |
---|
1482 | rtems_filesystem_eval_path_error(ctx, 0); |
---|
1483 | } |
---|
1484 | |
---|
1485 | free(buf); |
---|
1486 | } else { |
---|
1487 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1488 | } |
---|
1489 | } |
---|
1490 | |
---|
1491 | static void nfs_eval_set_handlers( |
---|
1492 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1493 | ftype type |
---|
1494 | ) |
---|
1495 | { |
---|
1496 | rtems_filesystem_location_info_t *currentloc = |
---|
1497 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1498 | |
---|
1499 | switch (type) { |
---|
1500 | case NFDIR: |
---|
1501 | currentloc->handlers = &nfs_dir_file_handlers; |
---|
1502 | break; |
---|
1503 | case NFREG: |
---|
1504 | currentloc->handlers = &nfs_file_file_handlers; |
---|
1505 | break; |
---|
1506 | case NFLNK: |
---|
1507 | currentloc->handlers = &nfs_link_file_handlers; |
---|
1508 | break; |
---|
1509 | default: |
---|
1510 | currentloc->handlers = &rtems_filesystem_handlers_default; |
---|
1511 | break; |
---|
1512 | } |
---|
1513 | } |
---|
1514 | |
---|
1515 | static int nfs_move_node(NfsNode dst, const NfsNode src, const char *part) |
---|
1516 | { |
---|
1517 | int rv = 0; |
---|
1518 | |
---|
1519 | if (dst->str != NULL) { |
---|
1520 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1521 | rtems_interrupt_level flags; |
---|
1522 | rtems_interrupt_disable(flags); |
---|
1523 | dst->nfs->stringsInUse--; |
---|
1524 | rtems_interrupt_enable(flags); |
---|
1525 | #endif |
---|
1526 | free(dst->str); |
---|
1527 | } |
---|
1528 | |
---|
1529 | *dst = *src; |
---|
1530 | |
---|
1531 | dst->str = dst->args.name = strdup(part); |
---|
1532 | if (dst->str != NULL) { |
---|
1533 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1534 | rtems_interrupt_level flags; |
---|
1535 | rtems_interrupt_disable(flags); |
---|
1536 | dst->nfs->stringsInUse++; |
---|
1537 | rtems_interrupt_enable(flags); |
---|
1538 | #endif |
---|
1539 | } else { |
---|
1540 | rv = -1; |
---|
1541 | } |
---|
1542 | |
---|
1543 | return rv; |
---|
1544 | } |
---|
1545 | |
---|
1546 | static rtems_filesystem_eval_path_generic_status nfs_eval_part( |
---|
1547 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1548 | char *part |
---|
1549 | ) |
---|
1550 | { |
---|
1551 | rtems_filesystem_eval_path_generic_status status = |
---|
1552 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
---|
1553 | rtems_filesystem_location_info_t *currentloc = |
---|
1554 | rtems_filesystem_eval_path_get_currentloc(ctx); |
---|
1555 | Nfs nfs = currentloc->mt_entry->fs_info; |
---|
1556 | NfsNode dir = currentloc->node_access; |
---|
1557 | NfsNodeRec entry; |
---|
1558 | int rv = nfs_search_in_directory(nfs, dir, part, &entry); |
---|
1559 | |
---|
1560 | if (rv == 0) { |
---|
1561 | bool terminal = !rtems_filesystem_eval_path_has_path(ctx); |
---|
1562 | int eval_flags = rtems_filesystem_eval_path_get_flags(ctx); |
---|
1563 | bool follow_sym_link = (eval_flags & RTEMS_FS_FOLLOW_SYM_LINK) != 0; |
---|
1564 | ftype type = SERP_ATTR(&entry).type; |
---|
1565 | |
---|
1566 | rtems_filesystem_eval_path_clear_token(ctx); |
---|
1567 | |
---|
1568 | if (type == NFLNK && (follow_sym_link || !terminal)) { |
---|
1569 | nfs_eval_follow_link(ctx, &entry); |
---|
1570 | } else { |
---|
1571 | rv = nfs_move_node(dir, &entry, part); |
---|
1572 | if (rv == 0) { |
---|
1573 | nfs_eval_set_handlers(ctx, type); |
---|
1574 | if (!terminal) { |
---|
1575 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
---|
1576 | } |
---|
1577 | } else { |
---|
1578 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1579 | } |
---|
1580 | } |
---|
1581 | } else { |
---|
1582 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY; |
---|
1583 | } |
---|
1584 | |
---|
1585 | return status; |
---|
1586 | } |
---|
1587 | |
---|
1588 | static rtems_filesystem_eval_path_generic_status nfs_eval_token( |
---|
1589 | rtems_filesystem_eval_path_context_t *ctx, |
---|
1590 | void *arg, |
---|
1591 | const char *token, |
---|
1592 | size_t tokenlen |
---|
1593 | ) |
---|
1594 | { |
---|
1595 | rtems_filesystem_eval_path_generic_status status = |
---|
1596 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
---|
1597 | |
---|
1598 | if (rtems_filesystem_is_current_directory(token, tokenlen)) { |
---|
1599 | rtems_filesystem_eval_path_clear_token(ctx); |
---|
1600 | if (rtems_filesystem_eval_path_has_path(ctx)) { |
---|
1601 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
---|
1602 | } |
---|
1603 | } else { |
---|
1604 | char *part = nfs_dupname(token, tokenlen); |
---|
1605 | |
---|
1606 | if (part != NULL) { |
---|
1607 | status = nfs_eval_part(ctx, part); |
---|
1608 | free(part); |
---|
1609 | } else { |
---|
1610 | rtems_filesystem_eval_path_error(ctx, ENOMEM); |
---|
1611 | } |
---|
1612 | } |
---|
1613 | |
---|
1614 | return status; |
---|
1615 | } |
---|
1616 | |
---|
1617 | static const rtems_filesystem_eval_path_generic_config nfs_eval_config = { |
---|
1618 | .is_directory = nfs_is_directory, |
---|
1619 | .eval_token = nfs_eval_token |
---|
1620 | }; |
---|
1621 | |
---|
1622 | static void nfs_eval_path(rtems_filesystem_eval_path_context_t *ctx) |
---|
1623 | { |
---|
1624 | rtems_filesystem_eval_path_generic(ctx, NULL, &nfs_eval_config); |
---|
1625 | } |
---|
1626 | |
---|
1627 | /* create a hard link */ |
---|
1628 | |
---|
1629 | static int nfs_link( |
---|
1630 | const rtems_filesystem_location_info_t *parentloc, |
---|
1631 | const rtems_filesystem_location_info_t *targetloc, |
---|
1632 | const char *name, |
---|
1633 | size_t namelen |
---|
1634 | ) |
---|
1635 | { |
---|
1636 | int rv = 0; |
---|
1637 | NfsNode pNode = parentloc->node_access; |
---|
1638 | nfsstat status; |
---|
1639 | NfsNode tNode = targetloc->node_access; |
---|
1640 | char *dupname; |
---|
1641 | |
---|
1642 | dupname = nfs_dupname(name, namelen); |
---|
1643 | if (dupname == NULL) |
---|
1644 | return -1; |
---|
1645 | |
---|
1646 | #if DEBUG & DEBUG_SYSCALLS |
---|
1647 | fprintf(stderr,"Creating link '%s'\n",dupname); |
---|
1648 | #endif |
---|
1649 | |
---|
1650 | memcpy(&SERP_ARGS(tNode).linkarg.to.dir, |
---|
1651 | &SERP_FILE(pNode), |
---|
1652 | sizeof(SERP_FILE(pNode))); |
---|
1653 | |
---|
1654 | SERP_ARGS(tNode).linkarg.to.name = dupname; |
---|
1655 | |
---|
1656 | rv = nfscall( |
---|
1657 | tNode->nfs->server, |
---|
1658 | NFSPROC_LINK, |
---|
1659 | (xdrproc_t)xdr_linkargs, &SERP_FILE(tNode), |
---|
1660 | (xdrproc_t)xdr_nfsstat, &status |
---|
1661 | ); |
---|
1662 | |
---|
1663 | if (rv == 0) { |
---|
1664 | rv = nfsEvaluateStatus(status); |
---|
1665 | #if DEBUG & DEBUG_SYSCALLS |
---|
1666 | if (rv != 0) { |
---|
1667 | perror("nfs_link"); |
---|
1668 | } |
---|
1669 | #endif |
---|
1670 | } |
---|
1671 | |
---|
1672 | free(dupname); |
---|
1673 | |
---|
1674 | return rv; |
---|
1675 | |
---|
1676 | } |
---|
1677 | |
---|
1678 | static int nfs_do_unlink( |
---|
1679 | const rtems_filesystem_location_info_t *parentloc, |
---|
1680 | const rtems_filesystem_location_info_t *loc, |
---|
1681 | int proc |
---|
1682 | ) |
---|
1683 | { |
---|
1684 | int rv = 0; |
---|
1685 | nfsstat status; |
---|
1686 | NfsNode node = loc->node_access; |
---|
1687 | Nfs nfs = node->nfs; |
---|
1688 | #if DEBUG & DEBUG_SYSCALLS |
---|
1689 | char *name = NFSPROC_REMOVE == proc ? |
---|
1690 | "nfs_unlink" : "nfs_rmdir"; |
---|
1691 | #endif |
---|
1692 | |
---|
1693 | /* The FS generics have determined that pathloc is _not_ |
---|
1694 | * a directory. Hence we may assume that the parent |
---|
1695 | * is in our NFS. |
---|
1696 | */ |
---|
1697 | |
---|
1698 | #if DEBUG & DEBUG_SYSCALLS |
---|
1699 | assert( node->args.name == node->str && node->str ); |
---|
1700 | |
---|
1701 | fprintf(stderr,"%s '%s'\n", name, node->args.name); |
---|
1702 | #endif |
---|
1703 | |
---|
1704 | rv = nfscall( |
---|
1705 | nfs->server, |
---|
1706 | proc, |
---|
1707 | (xdrproc_t)xdr_diropargs, &node->args, |
---|
1708 | (xdrproc_t)xdr_nfsstat, &status |
---|
1709 | ); |
---|
1710 | |
---|
1711 | if (rv == 0) { |
---|
1712 | rv = nfsEvaluateStatus(status); |
---|
1713 | #if DEBUG & DEBUG_SYSCALLS |
---|
1714 | if (rv != 0) { |
---|
1715 | perror(name); |
---|
1716 | } |
---|
1717 | #endif |
---|
1718 | } |
---|
1719 | |
---|
1720 | return rv; |
---|
1721 | } |
---|
1722 | |
---|
1723 | static int nfs_chown( |
---|
1724 | const rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
1725 | uid_t owner, /* IN */ |
---|
1726 | gid_t group /* IN */ |
---|
1727 | ) |
---|
1728 | { |
---|
1729 | sattr arg; |
---|
1730 | |
---|
1731 | arg.uid = owner; |
---|
1732 | arg.gid = group; |
---|
1733 | |
---|
1734 | return nfs_sattr(pathloc->node_access, &arg, SATTR_UID | SATTR_GID); |
---|
1735 | |
---|
1736 | } |
---|
1737 | |
---|
1738 | static int nfs_clonenode(rtems_filesystem_location_info_t *loc) |
---|
1739 | { |
---|
1740 | NfsNode node = loc->node_access; |
---|
1741 | |
---|
1742 | LOCK(nfsGlob.lock); |
---|
1743 | node = nfsNodeClone(node); |
---|
1744 | UNLOCK(nfsGlob.lock); |
---|
1745 | |
---|
1746 | loc->node_access = node; |
---|
1747 | |
---|
1748 | return node != NULL ? 0 : -1; |
---|
1749 | } |
---|
1750 | |
---|
1751 | /* Cleanup the FS private info attached to pathloc->node_access */ |
---|
1752 | static void nfs_freenode( |
---|
1753 | const rtems_filesystem_location_info_t *pathloc /* IN */ |
---|
1754 | ) |
---|
1755 | { |
---|
1756 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1757 | Nfs nfs = ((NfsNode)pathloc->node_access)->nfs; |
---|
1758 | |
---|
1759 | /* print counts at entry where they are > 0 so 'nfs' is safe from being destroyed |
---|
1760 | * and there's no race condition |
---|
1761 | */ |
---|
1762 | fprintf(stderr, |
---|
1763 | "entering freenode, in use count is %i nodes, %i strings\n", |
---|
1764 | nfs->nodesInUse, |
---|
1765 | nfs->stringsInUse); |
---|
1766 | #endif |
---|
1767 | |
---|
1768 | nfsNodeDestroy(pathloc->node_access); |
---|
1769 | } |
---|
1770 | |
---|
1771 | /* NOTE/TODO: mounting on top of NFS is not currently supported |
---|
1772 | * |
---|
1773 | * Challenge: stateless protocol. It would be possible to |
---|
1774 | * delete mount points on the server. We would need some sort |
---|
1775 | * of a 'garbage collector' looking for dead/unreachable |
---|
1776 | * mount points and unmounting them. |
---|
1777 | * Also, the path evaluation routine would have to check |
---|
1778 | * for crossing mount points. Crossing over from one NFS |
---|
1779 | * into another NFS could probably handled iteratively |
---|
1780 | * rather than by recursion. |
---|
1781 | */ |
---|
1782 | |
---|
1783 | int rtems_nfs_initialize( |
---|
1784 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
1785 | const void *data |
---|
1786 | ) |
---|
1787 | { |
---|
1788 | char *host; |
---|
1789 | struct sockaddr_in saddr; |
---|
1790 | enum clnt_stat stat; |
---|
1791 | fhstatus fhstat; |
---|
1792 | u_long uid,gid; |
---|
1793 | #ifdef NFS_V2_PORT |
---|
1794 | int retry; |
---|
1795 | #endif |
---|
1796 | Nfs nfs = 0; |
---|
1797 | NfsNode rootNode = 0; |
---|
1798 | RpcUdpServer nfsServer = 0; |
---|
1799 | int e = -1; |
---|
1800 | char *path = mt_entry->dev; |
---|
1801 | |
---|
1802 | if (rpcUdpInit () < 0) { |
---|
1803 | fprintf (stderr, "error: initialising RPC\n"); |
---|
1804 | return -1; |
---|
1805 | } |
---|
1806 | |
---|
1807 | if (nfsInit(0, 0) != 0) { |
---|
1808 | fprintf (stderr, "error: initialising NFS\n"); |
---|
1809 | return -1; |
---|
1810 | }; |
---|
1811 | |
---|
1812 | #if 0 |
---|
1813 | printf("Trying to mount %s on %s\n",path,mntpoint); |
---|
1814 | #endif |
---|
1815 | |
---|
1816 | if ( buildIpAddr(&uid, &gid, &host, &saddr, &path) ) |
---|
1817 | return -1; |
---|
1818 | |
---|
1819 | #ifdef NFS_V2_PORT |
---|
1820 | /* if the portmapper fails, retry a fixed port */ |
---|
1821 | for (retry = 1, saddr.sin_port = 0, stat = RPC_FAILED; |
---|
1822 | retry >= 0 && stat; |
---|
1823 | stat && (saddr.sin_port = htons(NFS_V2_PORT)), retry-- ) |
---|
1824 | #endif |
---|
1825 | stat = rpcUdpServerCreate( |
---|
1826 | &saddr, |
---|
1827 | NFS_PROGRAM, |
---|
1828 | NFS_VERSION_2, |
---|
1829 | uid, |
---|
1830 | gid, |
---|
1831 | &nfsServer |
---|
1832 | ); |
---|
1833 | |
---|
1834 | if ( RPC_SUCCESS != stat ) { |
---|
1835 | fprintf(stderr, |
---|
1836 | "Unable to contact NFS server - invalid port? (%s)\n", |
---|
1837 | clnt_sperrno(stat)); |
---|
1838 | e = EPROTONOSUPPORT; |
---|
1839 | goto cleanup; |
---|
1840 | } |
---|
1841 | |
---|
1842 | |
---|
1843 | /* first, try to ping the NFS server by |
---|
1844 | * calling the NULL proc. |
---|
1845 | */ |
---|
1846 | if ( nfscall(nfsServer, |
---|
1847 | NFSPROC_NULL, |
---|
1848 | (xdrproc_t)xdr_void, 0, |
---|
1849 | (xdrproc_t)xdr_void, 0) ) { |
---|
1850 | |
---|
1851 | fputs("NFS Ping ",stderr); |
---|
1852 | fwrite(host, 1, path-host-1, stderr); |
---|
1853 | fprintf(stderr," failed: %s\n", strerror(errno)); |
---|
1854 | |
---|
1855 | e = errno ? errno : EIO; |
---|
1856 | goto cleanup; |
---|
1857 | } |
---|
1858 | |
---|
1859 | /* that seemed to work - we now try the |
---|
1860 | * actual mount |
---|
1861 | */ |
---|
1862 | |
---|
1863 | /* reuse server address but let the mntcall() |
---|
1864 | * search for the mountd's port |
---|
1865 | */ |
---|
1866 | saddr.sin_port = 0; |
---|
1867 | |
---|
1868 | stat = mntcall( &saddr, |
---|
1869 | MOUNTPROC_MNT, |
---|
1870 | (xdrproc_t)xdr_dirpath, |
---|
1871 | &path, |
---|
1872 | (xdrproc_t)xdr_fhstatus, |
---|
1873 | &fhstat, |
---|
1874 | uid, |
---|
1875 | gid ); |
---|
1876 | |
---|
1877 | if (stat) { |
---|
1878 | fprintf(stderr,"MOUNT -- %s\n",clnt_sperrno(stat)); |
---|
1879 | if ( e<=0 ) |
---|
1880 | e = EIO; |
---|
1881 | goto cleanup; |
---|
1882 | } else if (NFS_OK != (e=fhstat.fhs_status)) { |
---|
1883 | fprintf(stderr,"MOUNT: %s\n",strerror(e)); |
---|
1884 | goto cleanup; |
---|
1885 | } |
---|
1886 | |
---|
1887 | nfs = nfsCreate(nfsServer); |
---|
1888 | assert( nfs ); |
---|
1889 | nfsServer = 0; |
---|
1890 | |
---|
1891 | nfs->uid = uid; |
---|
1892 | nfs->gid = gid; |
---|
1893 | |
---|
1894 | /* that seemed to work - we now create the root node |
---|
1895 | * and we also must obtain the root node attributes |
---|
1896 | */ |
---|
1897 | rootNode = nfsNodeCreate(nfs, &fhstat.fhstatus_u.fhs_fhandle); |
---|
1898 | assert( rootNode ); |
---|
1899 | |
---|
1900 | if ( updateAttr(rootNode, 1 /* force */) ) { |
---|
1901 | e = errno; |
---|
1902 | goto cleanup; |
---|
1903 | } |
---|
1904 | |
---|
1905 | /* looks good so far */ |
---|
1906 | |
---|
1907 | mt_entry->mt_fs_root->location.node_access = rootNode; |
---|
1908 | |
---|
1909 | rootNode = 0; |
---|
1910 | |
---|
1911 | mt_entry->ops = &nfs_fs_ops; |
---|
1912 | mt_entry->mt_fs_root->location.handlers = &nfs_dir_file_handlers; |
---|
1913 | mt_entry->pathconf_limits_and_options = &nfs_limits_and_options; |
---|
1914 | |
---|
1915 | LOCK(nfsGlob.llock); |
---|
1916 | nfsGlob.num_mounted_fs++; |
---|
1917 | /* allocate a new ID for this FS */ |
---|
1918 | nfs->id = nfsGlob.fs_ids++; |
---|
1919 | UNLOCK(nfsGlob.llock); |
---|
1920 | |
---|
1921 | mt_entry->fs_info = nfs; |
---|
1922 | nfs->mt_entry = mt_entry; |
---|
1923 | nfs = 0; |
---|
1924 | |
---|
1925 | e = 0; |
---|
1926 | |
---|
1927 | cleanup: |
---|
1928 | if (nfs) |
---|
1929 | nfsDestroy(nfs); |
---|
1930 | if (nfsServer) |
---|
1931 | rpcUdpServerDestroy(nfsServer); |
---|
1932 | if (rootNode) |
---|
1933 | nfsNodeDestroy(rootNode); |
---|
1934 | if (e) |
---|
1935 | rtems_set_errno_and_return_minus_one(e); |
---|
1936 | else |
---|
1937 | return 0; |
---|
1938 | } |
---|
1939 | |
---|
1940 | /* This op is called when they try to unmount THIS fs */ |
---|
1941 | STATIC void nfs_fsunmount_me( |
---|
1942 | rtems_filesystem_mount_table_entry_t *mt_entry /* in */ |
---|
1943 | ) |
---|
1944 | { |
---|
1945 | enum clnt_stat stat; |
---|
1946 | struct sockaddr_in saddr; |
---|
1947 | char *path = mt_entry->dev; |
---|
1948 | int nodesInUse; |
---|
1949 | u_long uid,gid; |
---|
1950 | int status; |
---|
1951 | |
---|
1952 | LOCK(nfsGlob.llock); |
---|
1953 | nodesInUse = ((Nfs)mt_entry->fs_info)->nodesInUse; |
---|
1954 | |
---|
1955 | if (nodesInUse > 1 /* one ref to the root node used by us */) { |
---|
1956 | UNLOCK(nfsGlob.llock); |
---|
1957 | fprintf(stderr, |
---|
1958 | "Refuse to unmount; there are still %i nodes in use (1 used by us)\n", |
---|
1959 | nodesInUse); |
---|
1960 | rtems_fatal_error_occurred(0xdeadbeef); |
---|
1961 | return; |
---|
1962 | } |
---|
1963 | |
---|
1964 | status = buildIpAddr(&uid, &gid, 0, &saddr, &path); |
---|
1965 | assert( !status ); |
---|
1966 | |
---|
1967 | stat = mntcall( &saddr, |
---|
1968 | MOUNTPROC_UMNT, |
---|
1969 | (xdrproc_t)xdr_dirpath, &path, |
---|
1970 | (xdrproc_t)xdr_void, 0, |
---|
1971 | uid, |
---|
1972 | gid |
---|
1973 | ); |
---|
1974 | |
---|
1975 | if (stat) { |
---|
1976 | UNLOCK(nfsGlob.llock); |
---|
1977 | fprintf(stderr,"NFS UMOUNT -- %s\n", clnt_sperrno(stat)); |
---|
1978 | return; |
---|
1979 | } |
---|
1980 | |
---|
1981 | nfsNodeDestroy(mt_entry->mt_fs_root->location.node_access); |
---|
1982 | mt_entry->mt_fs_root->location.node_access = 0; |
---|
1983 | |
---|
1984 | nfsDestroy(mt_entry->fs_info); |
---|
1985 | mt_entry->fs_info = 0; |
---|
1986 | |
---|
1987 | nfsGlob.num_mounted_fs--; |
---|
1988 | UNLOCK(nfsGlob.llock); |
---|
1989 | } |
---|
1990 | |
---|
1991 | static int nfs_mknod( |
---|
1992 | const rtems_filesystem_location_info_t *parentloc, |
---|
1993 | const char *name, |
---|
1994 | size_t namelen, |
---|
1995 | mode_t mode, |
---|
1996 | dev_t dev |
---|
1997 | ) |
---|
1998 | { |
---|
1999 | |
---|
2000 | int rv = 0; |
---|
2001 | struct timeval now; |
---|
2002 | diropres res; |
---|
2003 | NfsNode node = parentloc->node_access; |
---|
2004 | Nfs nfs = node->nfs; |
---|
2005 | mode_t type = S_IFMT & mode; |
---|
2006 | char *dupname; |
---|
2007 | |
---|
2008 | if (type != S_IFDIR && type != S_IFREG) |
---|
2009 | rtems_set_errno_and_return_minus_one(ENOTSUP); |
---|
2010 | |
---|
2011 | dupname = nfs_dupname(name, namelen); |
---|
2012 | if (dupname == NULL) |
---|
2013 | return -1; |
---|
2014 | |
---|
2015 | #if DEBUG & DEBUG_SYSCALLS |
---|
2016 | fprintf(stderr,"nfs_mknod: creating %s\n", dupname); |
---|
2017 | #endif |
---|
2018 | |
---|
2019 | rtems_clock_get_tod_timeval(&now); |
---|
2020 | |
---|
2021 | SERP_ARGS(node).createarg.name = dupname; |
---|
2022 | SERP_ARGS(node).createarg.attributes.mode = mode; |
---|
2023 | SERP_ARGS(node).createarg.attributes.uid = nfs->uid; |
---|
2024 | SERP_ARGS(node).createarg.attributes.gid = nfs->gid; |
---|
2025 | SERP_ARGS(node).createarg.attributes.size = 0; |
---|
2026 | SERP_ARGS(node).createarg.attributes.atime.seconds = now.tv_sec; |
---|
2027 | SERP_ARGS(node).createarg.attributes.atime.useconds = now.tv_usec; |
---|
2028 | SERP_ARGS(node).createarg.attributes.mtime.seconds = now.tv_sec; |
---|
2029 | SERP_ARGS(node).createarg.attributes.mtime.useconds = now.tv_usec; |
---|
2030 | |
---|
2031 | rv = nfscall( |
---|
2032 | nfs->server, |
---|
2033 | (type == S_IFDIR) ? NFSPROC_MKDIR : NFSPROC_CREATE, |
---|
2034 | (xdrproc_t)xdr_createargs, &SERP_FILE(node), |
---|
2035 | (xdrproc_t)xdr_diropres, &res |
---|
2036 | ); |
---|
2037 | |
---|
2038 | if (rv == 0) { |
---|
2039 | rv = nfsEvaluateStatus(res.status); |
---|
2040 | #if DEBUG & DEBUG_SYSCALLS |
---|
2041 | if (rv != 0) { |
---|
2042 | perror("nfs_mknod"); |
---|
2043 | } |
---|
2044 | #endif |
---|
2045 | } |
---|
2046 | |
---|
2047 | free(dupname); |
---|
2048 | |
---|
2049 | return rv; |
---|
2050 | } |
---|
2051 | |
---|
2052 | static int nfs_rmnod( |
---|
2053 | const rtems_filesystem_location_info_t *parentloc, |
---|
2054 | const rtems_filesystem_location_info_t *loc |
---|
2055 | ) |
---|
2056 | { |
---|
2057 | int rv = 0; |
---|
2058 | NfsNode node = loc->node_access; |
---|
2059 | int force_update = 0; |
---|
2060 | |
---|
2061 | if (updateAttr(node, force_update) == 0) { |
---|
2062 | int proc = SERP_ATTR(node).type == NFDIR |
---|
2063 | ? NFSPROC_RMDIR |
---|
2064 | : NFSPROC_REMOVE; |
---|
2065 | |
---|
2066 | rv = nfs_do_unlink(parentloc, loc, proc); |
---|
2067 | } else { |
---|
2068 | rv = -1; |
---|
2069 | } |
---|
2070 | |
---|
2071 | return rv; |
---|
2072 | } |
---|
2073 | |
---|
2074 | static int nfs_utime( |
---|
2075 | const rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
2076 | time_t actime, /* IN */ |
---|
2077 | time_t modtime /* IN */ |
---|
2078 | ) |
---|
2079 | { |
---|
2080 | sattr arg; |
---|
2081 | |
---|
2082 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
2083 | arg.atime.seconds = actime; |
---|
2084 | arg.atime.useconds = 0; |
---|
2085 | arg.mtime.seconds = modtime; |
---|
2086 | arg.mtime.useconds = 0; |
---|
2087 | |
---|
2088 | return nfs_sattr(pathloc->node_access, &arg, SATTR_ATIME | SATTR_MTIME); |
---|
2089 | } |
---|
2090 | |
---|
2091 | static int nfs_symlink( |
---|
2092 | const rtems_filesystem_location_info_t *parentloc, |
---|
2093 | const char *name, |
---|
2094 | size_t namelen, |
---|
2095 | const char *target |
---|
2096 | ) |
---|
2097 | { |
---|
2098 | int rv = 0; |
---|
2099 | struct timeval now; |
---|
2100 | nfsstat status; |
---|
2101 | NfsNode node = parentloc->node_access; |
---|
2102 | Nfs nfs = node->nfs; |
---|
2103 | char *dupname; |
---|
2104 | |
---|
2105 | dupname = nfs_dupname(name, namelen); |
---|
2106 | if (dupname == NULL) |
---|
2107 | return -1; |
---|
2108 | |
---|
2109 | #if DEBUG & DEBUG_SYSCALLS |
---|
2110 | fprintf(stderr,"nfs_symlink: creating %s -> %s\n", dupname, target); |
---|
2111 | #endif |
---|
2112 | |
---|
2113 | rtems_clock_get_tod_timeval(&now); |
---|
2114 | |
---|
2115 | SERP_ARGS(node).symlinkarg.name = dupname; |
---|
2116 | SERP_ARGS(node).symlinkarg.to = (nfspath) target; |
---|
2117 | |
---|
2118 | SERP_ARGS(node).symlinkarg.attributes.mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; |
---|
2119 | SERP_ARGS(node).symlinkarg.attributes.uid = nfs->uid; |
---|
2120 | SERP_ARGS(node).symlinkarg.attributes.gid = nfs->gid; |
---|
2121 | SERP_ARGS(node).symlinkarg.attributes.size = 0; |
---|
2122 | SERP_ARGS(node).symlinkarg.attributes.atime.seconds = now.tv_sec; |
---|
2123 | SERP_ARGS(node).symlinkarg.attributes.atime.useconds = now.tv_usec; |
---|
2124 | SERP_ARGS(node).symlinkarg.attributes.mtime.seconds = now.tv_sec; |
---|
2125 | SERP_ARGS(node).symlinkarg.attributes.mtime.useconds = now.tv_usec; |
---|
2126 | |
---|
2127 | rv = nfscall( |
---|
2128 | nfs->server, |
---|
2129 | NFSPROC_SYMLINK, |
---|
2130 | (xdrproc_t)xdr_symlinkargs, &SERP_FILE(node), |
---|
2131 | (xdrproc_t)xdr_nfsstat, &status |
---|
2132 | ); |
---|
2133 | |
---|
2134 | if (rv == 0) { |
---|
2135 | rv = nfsEvaluateStatus(status); |
---|
2136 | #if DEBUG & DEBUG_SYSCALLS |
---|
2137 | perror("nfs_symlink"); |
---|
2138 | #endif |
---|
2139 | } |
---|
2140 | |
---|
2141 | free(dupname); |
---|
2142 | |
---|
2143 | return rv; |
---|
2144 | } |
---|
2145 | |
---|
2146 | static ssize_t nfs_readlink_with_node( |
---|
2147 | NfsNode node, |
---|
2148 | char *buf, |
---|
2149 | size_t len |
---|
2150 | ) |
---|
2151 | { |
---|
2152 | ssize_t rv; |
---|
2153 | Nfs nfs = node->nfs; |
---|
2154 | readlinkres_strbuf rr; |
---|
2155 | |
---|
2156 | rr.strbuf.buf = buf; |
---|
2157 | rr.strbuf.max = len - 1; |
---|
2158 | |
---|
2159 | rv = nfscall( |
---|
2160 | nfs->server, |
---|
2161 | NFSPROC_READLINK, |
---|
2162 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
2163 | (xdrproc_t)xdr_readlinkres_strbuf, &rr |
---|
2164 | ); |
---|
2165 | |
---|
2166 | if (rv == 0) { |
---|
2167 | rv = nfsEvaluateStatus(rr.status); |
---|
2168 | |
---|
2169 | if (rv == 0) { |
---|
2170 | rv = (ssize_t) strlen(rr.strbuf.buf); |
---|
2171 | } else { |
---|
2172 | #if DEBUG & DEBUG_SYSCALLS |
---|
2173 | perror("nfs_readlink_with_node"); |
---|
2174 | #endif |
---|
2175 | } |
---|
2176 | } |
---|
2177 | |
---|
2178 | return rv; |
---|
2179 | } |
---|
2180 | |
---|
2181 | static ssize_t nfs_readlink( |
---|
2182 | const rtems_filesystem_location_info_t *loc, |
---|
2183 | char *buf, |
---|
2184 | size_t len |
---|
2185 | ) |
---|
2186 | { |
---|
2187 | NfsNode node = loc->node_access; |
---|
2188 | |
---|
2189 | return nfs_readlink_with_node(node, buf, len); |
---|
2190 | } |
---|
2191 | |
---|
2192 | static int nfs_rename( |
---|
2193 | const rtems_filesystem_location_info_t *oldparentloc, |
---|
2194 | const rtems_filesystem_location_info_t *oldloc, |
---|
2195 | const rtems_filesystem_location_info_t *newparentloc, |
---|
2196 | const char *name, |
---|
2197 | size_t namelen |
---|
2198 | ) |
---|
2199 | { |
---|
2200 | int rv = 0; |
---|
2201 | char *dupname = nfs_dupname(name, namelen); |
---|
2202 | |
---|
2203 | if (dupname != NULL) { |
---|
2204 | NfsNode oldParentNode = oldparentloc->node_access; |
---|
2205 | NfsNode oldNode = oldloc->node_access; |
---|
2206 | NfsNode newParentNode = newparentloc->node_access; |
---|
2207 | Nfs nfs = oldParentNode->nfs; |
---|
2208 | const nfs_fh *toDirSrc = &SERP_FILE(newParentNode); |
---|
2209 | nfs_fh *toDirDst = &SERP_ARGS(oldParentNode).renamearg.to.dir; |
---|
2210 | nfsstat status; |
---|
2211 | |
---|
2212 | SERP_ARGS(oldParentNode).renamearg.name = oldNode->str; |
---|
2213 | SERP_ARGS(oldParentNode).renamearg.to.name = dupname; |
---|
2214 | memcpy(toDirDst, toDirSrc, sizeof(*toDirDst)); |
---|
2215 | |
---|
2216 | rv = nfscall( |
---|
2217 | nfs->server, |
---|
2218 | NFSPROC_RENAME, |
---|
2219 | (xdrproc_t) xdr_renameargs, |
---|
2220 | &SERP_FILE(oldParentNode), |
---|
2221 | (xdrproc_t) xdr_nfsstat, |
---|
2222 | &status |
---|
2223 | ); |
---|
2224 | |
---|
2225 | if (rv == 0) { |
---|
2226 | rv = nfsEvaluateStatus(status); |
---|
2227 | } |
---|
2228 | |
---|
2229 | free(dupname); |
---|
2230 | } else { |
---|
2231 | rv = -1; |
---|
2232 | } |
---|
2233 | |
---|
2234 | return rv; |
---|
2235 | } |
---|
2236 | |
---|
2237 | static void nfs_lock(const rtems_filesystem_mount_table_entry_t *mt_entry) |
---|
2238 | { |
---|
2239 | } |
---|
2240 | |
---|
2241 | static void nfs_unlock(const rtems_filesystem_mount_table_entry_t *mt_entry) |
---|
2242 | { |
---|
2243 | } |
---|
2244 | |
---|
2245 | static bool nfs_are_nodes_equal( |
---|
2246 | const rtems_filesystem_location_info_t *a, |
---|
2247 | const rtems_filesystem_location_info_t *b |
---|
2248 | ) |
---|
2249 | { |
---|
2250 | bool equal = false; |
---|
2251 | NfsNode na = a->node_access; |
---|
2252 | |
---|
2253 | if (updateAttr(na, 0) == 0) { |
---|
2254 | NfsNode nb = b->node_access; |
---|
2255 | |
---|
2256 | if (updateAttr(nb, 0) == 0) { |
---|
2257 | equal = SERP_ATTR(na).fileid == SERP_ATTR(nb).fileid |
---|
2258 | && SERP_ATTR(na).fsid == SERP_ATTR(nb).fsid; |
---|
2259 | } |
---|
2260 | } |
---|
2261 | |
---|
2262 | return equal; |
---|
2263 | } |
---|
2264 | |
---|
2265 | static int nfs_fchmod( |
---|
2266 | const rtems_filesystem_location_info_t *loc, |
---|
2267 | mode_t mode |
---|
2268 | ) |
---|
2269 | { |
---|
2270 | sattr arg; |
---|
2271 | |
---|
2272 | arg.mode = mode; |
---|
2273 | return nfs_sattr(loc->node_access, &arg, SATTR_MODE); |
---|
2274 | |
---|
2275 | } |
---|
2276 | |
---|
2277 | const struct _rtems_filesystem_operations_table nfs_fs_ops = { |
---|
2278 | .lock_h = nfs_lock, |
---|
2279 | .unlock_h = nfs_unlock, |
---|
2280 | .eval_path_h = nfs_eval_path, |
---|
2281 | .link_h = nfs_link, |
---|
2282 | .are_nodes_equal_h = nfs_are_nodes_equal, |
---|
2283 | .mknod_h = nfs_mknod, |
---|
2284 | .rmnod_h = nfs_rmnod, |
---|
2285 | .fchmod_h = nfs_fchmod, |
---|
2286 | .chown_h = nfs_chown, |
---|
2287 | .clonenod_h = nfs_clonenode, |
---|
2288 | .freenod_h = nfs_freenode, |
---|
2289 | .mount_h = rtems_filesystem_default_mount, |
---|
2290 | .unmount_h = rtems_filesystem_default_unmount, |
---|
2291 | .fsunmount_me_h = nfs_fsunmount_me, |
---|
2292 | .utime_h = nfs_utime, |
---|
2293 | .symlink_h = nfs_symlink, |
---|
2294 | .readlink_h = nfs_readlink, |
---|
2295 | .rename_h = nfs_rename, |
---|
2296 | .statvfs_h = rtems_filesystem_default_statvfs |
---|
2297 | }; |
---|
2298 | |
---|
2299 | /***************************************** |
---|
2300 | File Handlers |
---|
2301 | |
---|
2302 | NOTE: the FS generics expect a FS' |
---|
2303 | evalpath_h() to switch the |
---|
2304 | pathloc->handlers according |
---|
2305 | to the pathloc/node's file |
---|
2306 | type. |
---|
2307 | We currently have 'file' and |
---|
2308 | 'directory' handlers and very |
---|
2309 | few 'symlink' handlers. |
---|
2310 | |
---|
2311 | The handlers for each type are |
---|
2312 | implemented or #defined ZERO |
---|
2313 | in a 'nfs_file_xxx', |
---|
2314 | 'nfs_dir_xxx', 'nfs_link_xxx' |
---|
2315 | sequence below this point. |
---|
2316 | |
---|
2317 | In some cases, a common handler, |
---|
2318 | can be used for all file types. |
---|
2319 | It is then simply called |
---|
2320 | 'nfs_xxx'. |
---|
2321 | *****************************************/ |
---|
2322 | |
---|
2323 | /* stateless NFS protocol makes this trivial */ |
---|
2324 | static int nfs_file_open( |
---|
2325 | rtems_libio_t *iop, |
---|
2326 | const char *pathname, |
---|
2327 | int oflag, |
---|
2328 | mode_t mode |
---|
2329 | ) |
---|
2330 | { |
---|
2331 | return 0; |
---|
2332 | } |
---|
2333 | |
---|
2334 | /* reading directories is not stateless; we must |
---|
2335 | * remember the last 'read' position, i.e. |
---|
2336 | * the server 'cookie'. We do manage this information |
---|
2337 | * attached to the pathinfo.node_access_2. |
---|
2338 | */ |
---|
2339 | static int nfs_dir_open( |
---|
2340 | rtems_libio_t *iop, |
---|
2341 | const char *pathname, |
---|
2342 | int oflag, |
---|
2343 | mode_t mode |
---|
2344 | ) |
---|
2345 | { |
---|
2346 | NfsNode node = iop->pathinfo.node_access; |
---|
2347 | DirInfo di; |
---|
2348 | |
---|
2349 | /* create a readdirargs object and copy the file handle; |
---|
2350 | * attach to the pathinfo.node_access_2 |
---|
2351 | */ |
---|
2352 | |
---|
2353 | di = (DirInfo) malloc(sizeof(*di)); |
---|
2354 | iop->pathinfo.node_access_2 = di; |
---|
2355 | |
---|
2356 | if ( !di ) { |
---|
2357 | errno = ENOMEM; |
---|
2358 | return -1; |
---|
2359 | } |
---|
2360 | |
---|
2361 | memcpy( &di->readdirargs.dir, |
---|
2362 | &SERP_FILE(node), |
---|
2363 | sizeof(di->readdirargs.dir) ); |
---|
2364 | |
---|
2365 | /* rewind cookie */ |
---|
2366 | memset( &di->readdirargs.cookie, |
---|
2367 | 0, |
---|
2368 | sizeof(di->readdirargs.cookie) ); |
---|
2369 | |
---|
2370 | di->eofreached = FALSE; |
---|
2371 | |
---|
2372 | return 0; |
---|
2373 | } |
---|
2374 | |
---|
2375 | static int nfs_file_close( |
---|
2376 | rtems_libio_t *iop |
---|
2377 | ) |
---|
2378 | { |
---|
2379 | return 0; |
---|
2380 | } |
---|
2381 | |
---|
2382 | static int nfs_dir_close( |
---|
2383 | rtems_libio_t *iop |
---|
2384 | ) |
---|
2385 | { |
---|
2386 | free(iop->pathinfo.node_access_2); |
---|
2387 | iop->pathinfo.node_access_2 = 0; |
---|
2388 | return 0; |
---|
2389 | } |
---|
2390 | |
---|
2391 | static ssize_t nfs_file_read_chunk( |
---|
2392 | NfsNode node, |
---|
2393 | uint32_t offset, |
---|
2394 | void *buffer, |
---|
2395 | size_t count |
---|
2396 | ) |
---|
2397 | { |
---|
2398 | ssize_t rv; |
---|
2399 | readres rr; |
---|
2400 | Nfs nfs = node->nfs; |
---|
2401 | |
---|
2402 | SERP_ARGS(node).readarg.offset = offset; |
---|
2403 | SERP_ARGS(node).readarg.count = count; |
---|
2404 | SERP_ARGS(node).readarg.totalcount = UINT32_C(0xdeadbeef); |
---|
2405 | |
---|
2406 | rr.readres_u.reply.data.data_val = buffer; |
---|
2407 | |
---|
2408 | rv = nfscall( |
---|
2409 | nfs->server, |
---|
2410 | NFSPROC_READ, |
---|
2411 | (xdrproc_t)xdr_readargs, &SERP_FILE(node), |
---|
2412 | (xdrproc_t)xdr_readres, &rr |
---|
2413 | ); |
---|
2414 | |
---|
2415 | if (rv == 0) { |
---|
2416 | rv = nfsEvaluateStatus(rr.status); |
---|
2417 | |
---|
2418 | if (rv == 0) { |
---|
2419 | rv = rr.readres_u.reply.data.data_len; |
---|
2420 | |
---|
2421 | #if DEBUG & DEBUG_SYSCALLS |
---|
2422 | fprintf(stderr, |
---|
2423 | "Read %i (asked for %i) bytes from offset %i to 0x%08x\n", |
---|
2424 | rr.readres_u.reply.data.data_len, |
---|
2425 | count, |
---|
2426 | iop->offset, |
---|
2427 | rr.readres_u.reply.data.data_val); |
---|
2428 | #endif |
---|
2429 | } |
---|
2430 | } |
---|
2431 | |
---|
2432 | return rv; |
---|
2433 | } |
---|
2434 | |
---|
2435 | static ssize_t nfs_file_read( |
---|
2436 | rtems_libio_t *iop, |
---|
2437 | void *buffer, |
---|
2438 | size_t count |
---|
2439 | ) |
---|
2440 | { |
---|
2441 | ssize_t rv = 0; |
---|
2442 | NfsNode node = iop->pathinfo.node_access; |
---|
2443 | uint32_t offset = iop->offset; |
---|
2444 | char *in = buffer; |
---|
2445 | |
---|
2446 | do { |
---|
2447 | size_t chunk = count <= NFS_MAXDATA ? count : NFS_MAXDATA; |
---|
2448 | ssize_t done = nfs_file_read_chunk(node, offset, in, chunk); |
---|
2449 | |
---|
2450 | if (done > 0) { |
---|
2451 | offset += (uint32_t) done; |
---|
2452 | in += done; |
---|
2453 | count -= (size_t) done; |
---|
2454 | rv += done; |
---|
2455 | } else { |
---|
2456 | count = 0; |
---|
2457 | if (done < 0) { |
---|
2458 | rv = -1; |
---|
2459 | } |
---|
2460 | } |
---|
2461 | } while (count > 0); |
---|
2462 | |
---|
2463 | if (rv > 0) { |
---|
2464 | iop->offset = offset; |
---|
2465 | } |
---|
2466 | |
---|
2467 | return rv; |
---|
2468 | } |
---|
2469 | |
---|
2470 | /* this is called by readdir() / getdents() */ |
---|
2471 | static ssize_t nfs_dir_read( |
---|
2472 | rtems_libio_t *iop, |
---|
2473 | void *buffer, |
---|
2474 | size_t count |
---|
2475 | ) |
---|
2476 | { |
---|
2477 | ssize_t rv; |
---|
2478 | DirInfo di = iop->pathinfo.node_access_2; |
---|
2479 | RpcUdpServer server = ((Nfs)iop->pathinfo.mt_entry->fs_info)->server; |
---|
2480 | |
---|
2481 | if ( di->eofreached ) |
---|
2482 | return 0; |
---|
2483 | |
---|
2484 | di->ptr = di->buf = buffer; |
---|
2485 | |
---|
2486 | /* align + round down the buffer */ |
---|
2487 | count &= ~ (DIRENT_HEADER_SIZE - 1); |
---|
2488 | di->len = count; |
---|
2489 | |
---|
2490 | #if 0 |
---|
2491 | /* now estimate the number of entries we should ask for */ |
---|
2492 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2493 | |
---|
2494 | /* estimate the encoded size that might take up */ |
---|
2495 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2496 | #else |
---|
2497 | /* integer arithmetics are better done the other way round */ |
---|
2498 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2499 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2500 | #endif |
---|
2501 | |
---|
2502 | if (count > NFS_MAXDATA) |
---|
2503 | count = NFS_MAXDATA; |
---|
2504 | |
---|
2505 | di->readdirargs.count = count; |
---|
2506 | |
---|
2507 | #if DEBUG & DEBUG_READDIR |
---|
2508 | fprintf(stderr, |
---|
2509 | "Readdir: asking for %i XDR bytes, buffer is %i\n", |
---|
2510 | count, di->len); |
---|
2511 | #endif |
---|
2512 | |
---|
2513 | rv = nfscall( |
---|
2514 | server, |
---|
2515 | NFSPROC_READDIR, |
---|
2516 | (xdrproc_t)xdr_readdirargs, &di->readdirargs, |
---|
2517 | (xdrproc_t)xdr_dir_info, di |
---|
2518 | ); |
---|
2519 | |
---|
2520 | if (rv == 0) { |
---|
2521 | rv = nfsEvaluateStatus(di->status); |
---|
2522 | |
---|
2523 | if (rv == 0) { |
---|
2524 | rv = (char*)di->ptr - (char*)buffer; |
---|
2525 | } |
---|
2526 | } |
---|
2527 | |
---|
2528 | return rv; |
---|
2529 | } |
---|
2530 | |
---|
2531 | static ssize_t nfs_file_write( |
---|
2532 | rtems_libio_t *iop, |
---|
2533 | const void *buffer, |
---|
2534 | size_t count |
---|
2535 | ) |
---|
2536 | { |
---|
2537 | ssize_t rv; |
---|
2538 | NfsNode node = iop->pathinfo.node_access; |
---|
2539 | Nfs nfs = node->nfs; |
---|
2540 | |
---|
2541 | if (count > NFS_MAXDATA) |
---|
2542 | count = NFS_MAXDATA; |
---|
2543 | |
---|
2544 | |
---|
2545 | SERP_ARGS(node).writearg.beginoffset = UINT32_C(0xdeadbeef); |
---|
2546 | if ( LIBIO_FLAGS_APPEND & iop->flags ) { |
---|
2547 | if ( updateAttr(node, 0) ) { |
---|
2548 | return -1; |
---|
2549 | } |
---|
2550 | SERP_ARGS(node).writearg.offset = SERP_ATTR(node).size; |
---|
2551 | } else { |
---|
2552 | SERP_ARGS(node).writearg.offset = iop->offset; |
---|
2553 | } |
---|
2554 | SERP_ARGS(node).writearg.totalcount = UINT32_C(0xdeadbeef); |
---|
2555 | SERP_ARGS(node).writearg.data.data_len = count; |
---|
2556 | SERP_ARGS(node).writearg.data.data_val = (void*)buffer; |
---|
2557 | |
---|
2558 | /* write XDR buffer size will be chosen by nfscall based |
---|
2559 | * on the PROC specifier |
---|
2560 | */ |
---|
2561 | |
---|
2562 | rv = nfscall( |
---|
2563 | nfs->server, |
---|
2564 | NFSPROC_WRITE, |
---|
2565 | (xdrproc_t)xdr_writeargs, &SERP_FILE(node), |
---|
2566 | (xdrproc_t)xdr_attrstat, &node->serporid |
---|
2567 | ); |
---|
2568 | |
---|
2569 | if (rv == 0) { |
---|
2570 | rv = nfsEvaluateStatus(node->serporid.status); |
---|
2571 | |
---|
2572 | if (rv == 0) { |
---|
2573 | node->age = nowSeconds(); |
---|
2574 | |
---|
2575 | iop->offset += count; |
---|
2576 | rv = count; |
---|
2577 | } else { |
---|
2578 | /* try at least to recover the current attributes */ |
---|
2579 | updateAttr(node, 1 /* force */); |
---|
2580 | } |
---|
2581 | } |
---|
2582 | |
---|
2583 | return rv; |
---|
2584 | } |
---|
2585 | |
---|
2586 | static off_t nfs_dir_lseek( |
---|
2587 | rtems_libio_t *iop, |
---|
2588 | off_t length, |
---|
2589 | int whence |
---|
2590 | ) |
---|
2591 | { |
---|
2592 | off_t rv = rtems_filesystem_default_lseek_directory(iop, length, whence); |
---|
2593 | |
---|
2594 | if (rv == 0) { |
---|
2595 | DirInfo di = iop->pathinfo.node_access_2; |
---|
2596 | nfscookie *cookie = &di->readdirargs.cookie; |
---|
2597 | |
---|
2598 | di->eofreached = FALSE; |
---|
2599 | |
---|
2600 | /* rewind cookie */ |
---|
2601 | memset(cookie, 0, sizeof(*cookie)); |
---|
2602 | } |
---|
2603 | |
---|
2604 | return rv; |
---|
2605 | } |
---|
2606 | |
---|
2607 | #if 0 /* structure types for reference */ |
---|
2608 | struct fattr { |
---|
2609 | ftype type; |
---|
2610 | u_int mode; |
---|
2611 | u_int nlink; |
---|
2612 | u_int uid; |
---|
2613 | u_int gid; |
---|
2614 | u_int size; |
---|
2615 | u_int blocksize; |
---|
2616 | u_int rdev; |
---|
2617 | u_int blocks; |
---|
2618 | u_int fsid; |
---|
2619 | u_int fileid; |
---|
2620 | nfstime atime; |
---|
2621 | nfstime mtime; |
---|
2622 | nfstime ctime; |
---|
2623 | }; |
---|
2624 | |
---|
2625 | struct stat |
---|
2626 | { |
---|
2627 | dev_t st_dev; |
---|
2628 | ino_t st_ino; |
---|
2629 | mode_t st_mode; |
---|
2630 | nlink_t st_nlink; |
---|
2631 | uid_t st_uid; |
---|
2632 | gid_t st_gid; |
---|
2633 | dev_t st_rdev; |
---|
2634 | off_t st_size; |
---|
2635 | /* SysV/sco doesn't have the rest... But Solaris, eabi does. */ |
---|
2636 | #if defined(__svr4__) && !defined(__PPC__) && !defined(__sun__) |
---|
2637 | time_t st_atime; |
---|
2638 | time_t st_mtime; |
---|
2639 | time_t st_ctime; |
---|
2640 | #else |
---|
2641 | time_t st_atime; |
---|
2642 | long st_spare1; |
---|
2643 | time_t st_mtime; |
---|
2644 | long st_spare2; |
---|
2645 | time_t st_ctime; |
---|
2646 | long st_spare3; |
---|
2647 | long st_blksize; |
---|
2648 | long st_blocks; |
---|
2649 | long st_spare4[2]; |
---|
2650 | #endif |
---|
2651 | }; |
---|
2652 | #endif |
---|
2653 | |
---|
2654 | /* common for file/dir/link */ |
---|
2655 | static int nfs_fstat( |
---|
2656 | const rtems_filesystem_location_info_t *loc, |
---|
2657 | struct stat *buf |
---|
2658 | ) |
---|
2659 | { |
---|
2660 | NfsNode node = loc->node_access; |
---|
2661 | fattr *fa = &SERP_ATTR(node); |
---|
2662 | |
---|
2663 | if (updateAttr(node, 0 /* only if old */)) { |
---|
2664 | return -1; |
---|
2665 | } |
---|
2666 | |
---|
2667 | /* done by caller |
---|
2668 | memset(buf, 0, sizeof(*buf)); |
---|
2669 | */ |
---|
2670 | |
---|
2671 | /* translate */ |
---|
2672 | |
---|
2673 | /* one of the branches hopefully is optimized away */ |
---|
2674 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
2675 | buf->st_dev = NFS_MAKE_DEV_T_INO_HACK((NfsNode)loc->node_access); |
---|
2676 | } else { |
---|
2677 | buf->st_dev = NFS_MAKE_DEV_T((NfsNode)loc->node_access); |
---|
2678 | } |
---|
2679 | buf->st_mode = fa->mode; |
---|
2680 | buf->st_nlink = fa->nlink; |
---|
2681 | buf->st_uid = fa->uid; |
---|
2682 | buf->st_gid = fa->gid; |
---|
2683 | buf->st_size = fa->size; |
---|
2684 | /* Set to "preferred size" of this NFS client implementation */ |
---|
2685 | buf->st_blksize = nfsStBlksize ? nfsStBlksize : fa->blocksize; |
---|
2686 | buf->st_rdev = fa->rdev; |
---|
2687 | buf->st_blocks = fa->blocks; |
---|
2688 | buf->st_ino = fa->fileid; |
---|
2689 | buf->st_atime = fa->atime.seconds; |
---|
2690 | buf->st_mtime = fa->mtime.seconds; |
---|
2691 | buf->st_ctime = fa->ctime.seconds; |
---|
2692 | |
---|
2693 | #if 0 /* NFS should return the modes */ |
---|
2694 | switch(fa->type) { |
---|
2695 | default: |
---|
2696 | case NFNON: |
---|
2697 | case NFBAD: |
---|
2698 | break; |
---|
2699 | |
---|
2700 | case NFSOCK: buf->st_mode |= S_IFSOCK; break; |
---|
2701 | case NFFIFO: buf->st_mode |= S_IFIFO; break; |
---|
2702 | case NFREG : buf->st_mode |= S_IFREG; break; |
---|
2703 | case NFDIR : buf->st_mode |= S_IFDIR; break; |
---|
2704 | case NFBLK : buf->st_mode |= S_IFBLK; break; |
---|
2705 | case NFCHR : buf->st_mode |= S_IFCHR; break; |
---|
2706 | case NFLNK : buf->st_mode |= S_IFLNK; break; |
---|
2707 | } |
---|
2708 | #endif |
---|
2709 | |
---|
2710 | return 0; |
---|
2711 | } |
---|
2712 | |
---|
2713 | /* a helper which does the real work for |
---|
2714 | * a couple of handlers (such as chmod, |
---|
2715 | * ftruncate or utime) |
---|
2716 | */ |
---|
2717 | static int |
---|
2718 | nfs_sattr(NfsNode node, sattr *arg, u_long mask) |
---|
2719 | { |
---|
2720 | int rv; |
---|
2721 | struct timeval now; |
---|
2722 | nfstime nfsnow, t; |
---|
2723 | u_int mode; |
---|
2724 | |
---|
2725 | if (updateAttr(node, 0 /* only if old */)) |
---|
2726 | return -1; |
---|
2727 | |
---|
2728 | rtems_clock_get_tod_timeval(&now); |
---|
2729 | |
---|
2730 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
2731 | nfsnow.seconds = now.tv_sec; |
---|
2732 | nfsnow.useconds = now.tv_usec; |
---|
2733 | |
---|
2734 | /* merge permission bits into existing type bits */ |
---|
2735 | mode = SERP_ATTR(node).mode; |
---|
2736 | if (mask & SATTR_MODE) { |
---|
2737 | mode &= S_IFMT; |
---|
2738 | mode |= arg->mode & ~S_IFMT; |
---|
2739 | } else { |
---|
2740 | mode = -1; |
---|
2741 | } |
---|
2742 | SERP_ARGS(node).sattrarg.attributes.mode = mode; |
---|
2743 | |
---|
2744 | SERP_ARGS(node).sattrarg.attributes.uid = |
---|
2745 | (mask & SATTR_UID) ? arg->uid : -1; |
---|
2746 | |
---|
2747 | SERP_ARGS(node).sattrarg.attributes.gid = |
---|
2748 | (mask & SATTR_GID) ? arg->gid : -1; |
---|
2749 | |
---|
2750 | SERP_ARGS(node).sattrarg.attributes.size = |
---|
2751 | (mask & SATTR_SIZE) ? arg->size : -1; |
---|
2752 | |
---|
2753 | if (mask & SATTR_ATIME) |
---|
2754 | t = arg->atime; |
---|
2755 | else if (mask & SATTR_TOUCHA) |
---|
2756 | t = nfsnow; |
---|
2757 | else |
---|
2758 | t.seconds = t.useconds = -1; |
---|
2759 | SERP_ARGS(node).sattrarg.attributes.atime = t; |
---|
2760 | |
---|
2761 | if (mask & SATTR_ATIME) |
---|
2762 | t = arg->mtime; |
---|
2763 | else if (mask & SATTR_TOUCHA) |
---|
2764 | t = nfsnow; |
---|
2765 | else |
---|
2766 | t.seconds = t.useconds = -1; |
---|
2767 | SERP_ARGS(node).sattrarg.attributes.mtime = t; |
---|
2768 | |
---|
2769 | node->serporid.status = NFS_OK; |
---|
2770 | |
---|
2771 | rv = nfscall( |
---|
2772 | node->nfs->server, |
---|
2773 | NFSPROC_SETATTR, |
---|
2774 | (xdrproc_t)xdr_sattrargs, &SERP_FILE(node), |
---|
2775 | (xdrproc_t)xdr_attrstat, &node->serporid |
---|
2776 | ); |
---|
2777 | |
---|
2778 | if (rv == 0) { |
---|
2779 | rv = nfsEvaluateStatus(node->serporid.status); |
---|
2780 | |
---|
2781 | if (rv == 0) { |
---|
2782 | node->age = nowSeconds(); |
---|
2783 | } else { |
---|
2784 | #if DEBUG & DEBUG_SYSCALLS |
---|
2785 | fprintf(stderr,"nfs_sattr: %s\n",strerror(errno)); |
---|
2786 | #endif |
---|
2787 | /* try at least to recover the current attributes */ |
---|
2788 | updateAttr(node, 1 /* force */); |
---|
2789 | } |
---|
2790 | } else { |
---|
2791 | #if DEBUG & DEBUG_SYSCALLS |
---|
2792 | fprintf(stderr, |
---|
2793 | "nfs_sattr (mask 0x%08x): %s", |
---|
2794 | mask, |
---|
2795 | strerror(errno)); |
---|
2796 | #endif |
---|
2797 | } |
---|
2798 | |
---|
2799 | return rv; |
---|
2800 | } |
---|
2801 | |
---|
2802 | /* just set the size attribute to 'length' |
---|
2803 | * the server will take care of the rest :-) |
---|
2804 | */ |
---|
2805 | static int nfs_file_ftruncate( |
---|
2806 | rtems_libio_t *iop, |
---|
2807 | off_t length |
---|
2808 | ) |
---|
2809 | { |
---|
2810 | sattr arg; |
---|
2811 | |
---|
2812 | arg.size = length; |
---|
2813 | /* must not modify any other attribute; if we are not the owner |
---|
2814 | * of the file or directory but only have write access changing |
---|
2815 | * any attribute besides 'size' will fail... |
---|
2816 | */ |
---|
2817 | return nfs_sattr(iop->pathinfo.node_access, |
---|
2818 | &arg, |
---|
2819 | SATTR_SIZE); |
---|
2820 | } |
---|
2821 | |
---|
2822 | /* the file handlers table */ |
---|
2823 | static const |
---|
2824 | struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers = { |
---|
2825 | .open_h = nfs_file_open, |
---|
2826 | .close_h = nfs_file_close, |
---|
2827 | .read_h = nfs_file_read, |
---|
2828 | .write_h = nfs_file_write, |
---|
2829 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2830 | .lseek_h = rtems_filesystem_default_lseek_file, |
---|
2831 | .fstat_h = nfs_fstat, |
---|
2832 | .ftruncate_h = nfs_file_ftruncate, |
---|
2833 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2834 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2835 | .fcntl_h = rtems_filesystem_default_fcntl, |
---|
2836 | .kqfilter_h = rtems_filesystem_default_kqfilter, |
---|
2837 | .poll_h = rtems_filesystem_default_poll, |
---|
2838 | .readv_h = rtems_filesystem_default_readv, |
---|
2839 | .writev_h = rtems_filesystem_default_writev |
---|
2840 | }; |
---|
2841 | |
---|
2842 | /* the directory handlers table */ |
---|
2843 | static const |
---|
2844 | struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers = { |
---|
2845 | .open_h = nfs_dir_open, |
---|
2846 | .close_h = nfs_dir_close, |
---|
2847 | .read_h = nfs_dir_read, |
---|
2848 | .write_h = rtems_filesystem_default_write, |
---|
2849 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2850 | .lseek_h = nfs_dir_lseek, |
---|
2851 | .fstat_h = nfs_fstat, |
---|
2852 | .ftruncate_h = rtems_filesystem_default_ftruncate_directory, |
---|
2853 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2854 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2855 | .fcntl_h = rtems_filesystem_default_fcntl, |
---|
2856 | .kqfilter_h = rtems_filesystem_default_kqfilter, |
---|
2857 | .poll_h = rtems_filesystem_default_poll, |
---|
2858 | .readv_h = rtems_filesystem_default_readv, |
---|
2859 | .writev_h = rtems_filesystem_default_writev |
---|
2860 | }; |
---|
2861 | |
---|
2862 | /* the link handlers table */ |
---|
2863 | static const |
---|
2864 | struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers = { |
---|
2865 | .open_h = rtems_filesystem_default_open, |
---|
2866 | .close_h = rtems_filesystem_default_close, |
---|
2867 | .read_h = rtems_filesystem_default_read, |
---|
2868 | .write_h = rtems_filesystem_default_write, |
---|
2869 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
2870 | .lseek_h = rtems_filesystem_default_lseek, |
---|
2871 | .fstat_h = nfs_fstat, |
---|
2872 | .ftruncate_h = rtems_filesystem_default_ftruncate, |
---|
2873 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2874 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
2875 | .fcntl_h = rtems_filesystem_default_fcntl, |
---|
2876 | .kqfilter_h = rtems_filesystem_default_kqfilter, |
---|
2877 | .poll_h = rtems_filesystem_default_poll, |
---|
2878 | .readv_h = rtems_filesystem_default_readv, |
---|
2879 | .writev_h = rtems_filesystem_default_writev |
---|
2880 | }; |
---|
2881 | |
---|
2882 | /* we need a dummy driver entry table to get a |
---|
2883 | * major number from the system |
---|
2884 | */ |
---|
2885 | static |
---|
2886 | rtems_device_driver nfs_initialize( |
---|
2887 | rtems_device_major_number major, |
---|
2888 | rtems_device_minor_number minor, |
---|
2889 | void *arg |
---|
2890 | ) |
---|
2891 | { |
---|
2892 | /* we don't really use this routine because |
---|
2893 | * we cannot supply an argument (contrary |
---|
2894 | * to what the 'arg' parameter suggests - it |
---|
2895 | * is always set to 0 by the generics :-() |
---|
2896 | * and because we don't want the user to |
---|
2897 | * have to deal with the major number (which |
---|
2898 | * OTOH is something WE are interested in. The |
---|
2899 | * only reason for using this API was getting |
---|
2900 | * a major number, after all). |
---|
2901 | * |
---|
2902 | * Something must be present, however, to |
---|
2903 | * reserve a slot in the driver table. |
---|
2904 | */ |
---|
2905 | return RTEMS_SUCCESSFUL; |
---|
2906 | } |
---|
2907 | |
---|
2908 | static rtems_driver_address_table drvNfs = { |
---|
2909 | nfs_initialize, |
---|
2910 | 0, /* open */ |
---|
2911 | 0, /* close */ |
---|
2912 | 0, /* read */ |
---|
2913 | 0, /* write */ |
---|
2914 | 0 /* control */ |
---|
2915 | }; |
---|
2916 | |
---|
2917 | /* Dump a list of the currently mounted NFS to a file */ |
---|
2918 | int |
---|
2919 | nfsMountsShow(FILE *f) |
---|
2920 | { |
---|
2921 | char *mntpt = 0; |
---|
2922 | Nfs nfs; |
---|
2923 | |
---|
2924 | if (!f) |
---|
2925 | f = stdout; |
---|
2926 | |
---|
2927 | if ( !(mntpt=malloc(MAXPATHLEN)) ) { |
---|
2928 | fprintf(stderr,"nfsMountsShow(): no memory\n"); |
---|
2929 | return -1; |
---|
2930 | } |
---|
2931 | |
---|
2932 | fprintf(f,"Currently Mounted NFS:\n"); |
---|
2933 | |
---|
2934 | LOCK(nfsGlob.llock); |
---|
2935 | |
---|
2936 | for (nfs = nfsGlob.mounted_fs; nfs; nfs=nfs->next) { |
---|
2937 | fprintf(f,"%s on ", nfs->mt_entry->dev); |
---|
2938 | if (rtems_filesystem_resolve_location(mntpt, MAXPATHLEN, &nfs->mt_entry->mt_fs_root->location)) |
---|
2939 | fprintf(f,"<UNABLE TO LOOKUP MOUNTPOINT>\n"); |
---|
2940 | else |
---|
2941 | fprintf(f,"%s\n",mntpt); |
---|
2942 | } |
---|
2943 | |
---|
2944 | UNLOCK(nfsGlob.llock); |
---|
2945 | |
---|
2946 | free(mntpt); |
---|
2947 | return 0; |
---|
2948 | } |
---|
2949 | |
---|
2950 | #if 0 |
---|
2951 | CCJ_REMOVE_MOUNT |
---|
2952 | /* convenience wrapper |
---|
2953 | * |
---|
2954 | * NOTE: this routine calls NON-REENTRANT |
---|
2955 | * gethostbyname() if the host is |
---|
2956 | * not in 'dot' notation. |
---|
2957 | */ |
---|
2958 | int |
---|
2959 | nfsMount(char *uidhost, char *path, char *mntpoint) |
---|
2960 | { |
---|
2961 | struct stat st; |
---|
2962 | int devl; |
---|
2963 | char *host; |
---|
2964 | int rval = -1; |
---|
2965 | char *dev = 0; |
---|
2966 | |
---|
2967 | if (!uidhost || !path || !mntpoint) { |
---|
2968 | fprintf(stderr,"usage: nfsMount(""[uid.gid@]host"",""path"",""mountpoint"")\n"); |
---|
2969 | nfsMountsShow(stderr); |
---|
2970 | return -1; |
---|
2971 | } |
---|
2972 | |
---|
2973 | if ( !(dev = malloc((devl=strlen(uidhost) + 20 + strlen(path)+1))) ) { |
---|
2974 | fprintf(stderr,"nfsMount: out of memory\n"); |
---|
2975 | return -1; |
---|
2976 | } |
---|
2977 | |
---|
2978 | /* Try to create the mount point if nonexistent */ |
---|
2979 | if (stat(mntpoint, &st)) { |
---|
2980 | if (ENOENT != errno) { |
---|
2981 | perror("nfsMount trying to create mount point - stat failed"); |
---|
2982 | goto cleanup; |
---|
2983 | } else if (mkdir(mntpoint,0777)) { |
---|
2984 | perror("nfsMount trying to create mount point"); |
---|
2985 | goto cleanup; |
---|
2986 | } |
---|
2987 | } |
---|
2988 | |
---|
2989 | if ( !(host=strchr(uidhost,UIDSEP)) ) { |
---|
2990 | host = uidhost; |
---|
2991 | } else { |
---|
2992 | host++; |
---|
2993 | } |
---|
2994 | |
---|
2995 | if (isdigit((unsigned char)*host)) { |
---|
2996 | /* avoid using gethostbyname */ |
---|
2997 | sprintf(dev,"%s:%s",uidhost,path); |
---|
2998 | } else { |
---|
2999 | struct hostent *h; |
---|
3000 | |
---|
3001 | /* copy the uid part (hostname will be |
---|
3002 | * overwritten) |
---|
3003 | */ |
---|
3004 | strcpy(dev, uidhost); |
---|
3005 | |
---|
3006 | /* NOTE NOTE NOTE: gethostbyname is NOT |
---|
3007 | * thread safe. This is UGLY |
---|
3008 | */ |
---|
3009 | |
---|
3010 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
3011 | |
---|
3012 | h = gethostbyname(host); |
---|
3013 | |
---|
3014 | if ( !h || |
---|
3015 | !inet_ntop( AF_INET, |
---|
3016 | (struct in_addr*)h->h_addr_list[0], |
---|
3017 | dev + (host - uidhost), |
---|
3018 | devl - (host - uidhost) ) |
---|
3019 | ) { |
---|
3020 | fprintf(stderr,"nfsMount: host '%s' not found\n",host); |
---|
3021 | goto cleanup; |
---|
3022 | } |
---|
3023 | |
---|
3024 | /* END OF NON-THREAD SAFE REGION */ |
---|
3025 | |
---|
3026 | /* append ':<path>' */ |
---|
3027 | strcat(dev,":"); |
---|
3028 | strcat(dev,path); |
---|
3029 | } |
---|
3030 | |
---|
3031 | printf("Trying to mount %s on %s\n",dev,mntpoint); |
---|
3032 | |
---|
3033 | if (mount(dev, |
---|
3034 | mntpoint, |
---|
3035 | "nfs", |
---|
3036 | RTEMS_FILESYSTEM_READ_WRITE, |
---|
3037 | NULL)) { |
---|
3038 | perror("nfsMount - mount"); |
---|
3039 | goto cleanup; |
---|
3040 | } |
---|
3041 | |
---|
3042 | rval = 0; |
---|
3043 | |
---|
3044 | cleanup: |
---|
3045 | free(dev); |
---|
3046 | return rval; |
---|
3047 | } |
---|
3048 | #endif |
---|
3049 | |
---|
3050 | /* HERE COMES A REALLY UGLY HACK */ |
---|
3051 | |
---|
3052 | /* This is stupid; it is _very_ hard to find the path |
---|
3053 | * leading to a rtems_filesystem_location_info_t node :-( |
---|
3054 | * The only easy way is making the location the current |
---|
3055 | * directory and issue a getcwd(). |
---|
3056 | * However, since we don't want to tamper with the |
---|
3057 | * current directory, we must create a separate |
---|
3058 | * task to do the job for us - sigh. |
---|
3059 | */ |
---|
3060 | |
---|
3061 | typedef struct ResolvePathArgRec_ { |
---|
3062 | rtems_filesystem_location_info_t *loc; /* IN: location to resolve */ |
---|
3063 | char *buf; /* IN/OUT: buffer where to put the path */ |
---|
3064 | int len; /* IN: buffer length */ |
---|
3065 | rtems_id sync; /* IN: synchronization */ |
---|
3066 | rtems_status_code status; /* OUT: result */ |
---|
3067 | } ResolvePathArgRec, *ResolvePathArg; |
---|
3068 | |
---|
3069 | static void |
---|
3070 | resolve_path(rtems_task_argument arg) |
---|
3071 | { |
---|
3072 | ResolvePathArg rpa = (ResolvePathArg)arg; |
---|
3073 | rtems_filesystem_location_info_t old; |
---|
3074 | |
---|
3075 | /* IMPORTANT: let the helper task have its own libio environment (i.e. cwd) */ |
---|
3076 | if (RTEMS_SUCCESSFUL == (rpa->status = rtems_libio_set_private_env())) { |
---|
3077 | |
---|
3078 | old = rtems_filesystem_current->location; |
---|
3079 | |
---|
3080 | rtems_filesystem_current->location = *(rpa->loc); |
---|
3081 | |
---|
3082 | if ( !getcwd(rpa->buf, rpa->len) ) |
---|
3083 | rpa->status = RTEMS_UNSATISFIED; |
---|
3084 | |
---|
3085 | /* must restore the cwd because 'freenode' will be called on it */ |
---|
3086 | rtems_filesystem_current->location = old; |
---|
3087 | } |
---|
3088 | rtems_semaphore_release(rpa->sync); |
---|
3089 | rtems_task_delete(RTEMS_SELF); |
---|
3090 | } |
---|
3091 | |
---|
3092 | |
---|
3093 | /* a utility routine to find the path leading to a |
---|
3094 | * rtems_filesystem_location_info_t node |
---|
3095 | * |
---|
3096 | * INPUT: 'loc' and a buffer 'buf' (length 'len') to hold the |
---|
3097 | * path. |
---|
3098 | * OUTPUT: path copied into 'buf' |
---|
3099 | * |
---|
3100 | * RETURNS: 0 on success, RTEMS error code on error. |
---|
3101 | */ |
---|
3102 | rtems_status_code |
---|
3103 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc) |
---|
3104 | { |
---|
3105 | ResolvePathArgRec arg; |
---|
3106 | rtems_id tid = 0; |
---|
3107 | rtems_task_priority pri; |
---|
3108 | rtems_status_code status; |
---|
3109 | |
---|
3110 | arg.loc = loc; |
---|
3111 | arg.buf = buf; |
---|
3112 | arg.len = len; |
---|
3113 | arg.sync = 0; |
---|
3114 | |
---|
3115 | status = rtems_semaphore_create( |
---|
3116 | rtems_build_name('r','e','s','s'), |
---|
3117 | 0, |
---|
3118 | RTEMS_SIMPLE_BINARY_SEMAPHORE, |
---|
3119 | 0, |
---|
3120 | &arg.sync); |
---|
3121 | |
---|
3122 | if (RTEMS_SUCCESSFUL != status) |
---|
3123 | goto cleanup; |
---|
3124 | |
---|
3125 | rtems_task_set_priority(RTEMS_SELF, RTEMS_CURRENT_PRIORITY, &pri); |
---|
3126 | |
---|
3127 | status = rtems_task_create( |
---|
3128 | rtems_build_name('r','e','s','s'), |
---|
3129 | pri, |
---|
3130 | RTEMS_MINIMUM_STACK_SIZE + 50000, |
---|
3131 | RTEMS_DEFAULT_MODES, |
---|
3132 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
3133 | &tid); |
---|
3134 | |
---|
3135 | if (RTEMS_SUCCESSFUL != status) |
---|
3136 | goto cleanup; |
---|
3137 | |
---|
3138 | status = rtems_task_start(tid, resolve_path, (rtems_task_argument)&arg); |
---|
3139 | |
---|
3140 | if (RTEMS_SUCCESSFUL != status) { |
---|
3141 | rtems_task_delete(tid); |
---|
3142 | goto cleanup; |
---|
3143 | } |
---|
3144 | |
---|
3145 | |
---|
3146 | /* synchronize with the helper task */ |
---|
3147 | rtems_semaphore_obtain(arg.sync, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
3148 | |
---|
3149 | status = arg.status; |
---|
3150 | |
---|
3151 | cleanup: |
---|
3152 | if (arg.sync) |
---|
3153 | rtems_semaphore_delete(arg.sync); |
---|
3154 | |
---|
3155 | return status; |
---|
3156 | } |
---|
3157 | |
---|
3158 | int |
---|
3159 | nfsSetTimeout(uint32_t timeout_ms) |
---|
3160 | { |
---|
3161 | rtems_interrupt_level k; |
---|
3162 | uint32_t s,us; |
---|
3163 | |
---|
3164 | if ( timeout_ms > 100000 ) { |
---|
3165 | /* out of range */ |
---|
3166 | return -1; |
---|
3167 | } |
---|
3168 | |
---|
3169 | s = timeout_ms/1000; |
---|
3170 | us = (timeout_ms % 1000) * 1000; |
---|
3171 | |
---|
3172 | rtems_interrupt_disable(k); |
---|
3173 | _nfscalltimeout.tv_sec = s; |
---|
3174 | _nfscalltimeout.tv_usec = us; |
---|
3175 | rtems_interrupt_enable(k); |
---|
3176 | |
---|
3177 | return 0; |
---|
3178 | } |
---|
3179 | |
---|
3180 | uint32_t |
---|
3181 | nfsGetTimeout( void ) |
---|
3182 | { |
---|
3183 | rtems_interrupt_level k; |
---|
3184 | uint32_t s,us; |
---|
3185 | rtems_interrupt_disable(k); |
---|
3186 | s = _nfscalltimeout.tv_sec; |
---|
3187 | us = _nfscalltimeout.tv_usec; |
---|
3188 | rtems_interrupt_enable(k); |
---|
3189 | return s*1000 + us/1000; |
---|
3190 | } |
---|