1 | /* $Id$ */ |
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2 | |
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3 | /* NFS client implementation for RTEMS; hooks into the RTEMS filesystem */ |
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4 | |
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5 | /* Author: Till Straumann <strauman@slac.stanford.edu> 2002 */ |
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6 | |
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7 | /* Hacked on by others. */ |
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8 | |
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9 | /* |
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10 | * Authorship |
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11 | * ---------- |
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12 | * This software (NFS-2 client implementation for RTEMS) was created by |
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13 | * Till Straumann <strauman@slac.stanford.edu>, 2002-2007, |
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14 | * Stanford Linear Accelerator Center, Stanford University. |
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15 | * |
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16 | * Acknowledgement of sponsorship |
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17 | * ------------------------------ |
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18 | * The NFS-2 client implementation for RTEMS was produced by |
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19 | * the Stanford Linear Accelerator Center, Stanford University, |
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20 | * under Contract DE-AC03-76SFO0515 with the Department of Energy. |
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21 | * |
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22 | * Government disclaimer of liability |
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23 | * ---------------------------------- |
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24 | * Neither the United States nor the United States Department of Energy, |
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25 | * nor any of their employees, makes any warranty, express or implied, or |
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26 | * assumes any legal liability or responsibility for the accuracy, |
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27 | * completeness, or usefulness of any data, apparatus, product, or process |
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28 | * disclosed, or represents that its use would not infringe privately owned |
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29 | * rights. |
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30 | * |
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31 | * Stanford disclaimer of liability |
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32 | * -------------------------------- |
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33 | * Stanford University makes no representations or warranties, express or |
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34 | * implied, nor assumes any liability for the use of this software. |
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35 | * |
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36 | * Stanford disclaimer of copyright |
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37 | * -------------------------------- |
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38 | * Stanford University, owner of the copyright, hereby disclaims its |
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39 | * copyright and all other rights in this software. Hence, anyone may |
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40 | * freely use it for any purpose without restriction. |
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41 | * |
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42 | * Maintenance of notices |
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43 | * ---------------------- |
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44 | * In the interest of clarity regarding the origin and status of this |
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45 | * SLAC software, this and all the preceding Stanford University notices |
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46 | * are to remain affixed to any copy or derivative of this software made |
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47 | * or distributed by the recipient and are to be affixed to any copy of |
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48 | * software made or distributed by the recipient that contains a copy or |
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49 | * derivative of this software. |
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50 | * |
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51 | * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 |
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52 | */ |
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53 | |
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54 | #ifdef HAVE_CONFIG_H |
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55 | #include <config.h> |
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56 | #endif |
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57 | |
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58 | #include <rtems.h> |
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59 | #include <rtems/libio.h> |
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60 | #include <rtems/libio_.h> |
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61 | #include <rtems/seterr.h> |
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62 | #include <string.h> |
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63 | #include <stdio.h> |
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64 | #include <stdlib.h> |
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65 | #include <assert.h> |
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66 | #include <sys/stat.h> |
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67 | #include <dirent.h> |
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68 | #include <netdb.h> |
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69 | #include <ctype.h> |
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70 | #include <netinet/in.h> |
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71 | #include <arpa/inet.h> |
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72 | |
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73 | #include <nfs_prot.h> |
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74 | #include <mount_prot.h> |
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75 | |
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76 | #include "rpcio.h" |
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77 | |
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78 | /* Configurable parameters */ |
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79 | |
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80 | /* Estimated average length of a filename (including terminating 0). |
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81 | * This was calculated by doing |
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82 | * |
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83 | * find <some root> -print -exec basename '{}' \; > feil |
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84 | * wc feil |
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85 | * |
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86 | * AVG_NAMLEN = (num_chars + num_lines)/num_lines |
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87 | */ |
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88 | #define CONFIG_AVG_NAMLEN 10 |
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89 | |
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90 | #define CONFIG_NFS_SMALL_XACT_SIZE 800 /* size of RPC arguments for non-write ops */ |
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91 | /* lifetime of NFS attributes in a NfsNode; |
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92 | * the time is in seconds and the lifetime is |
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93 | * infinite if the symbol is #undef |
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94 | */ |
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95 | #define CONFIG_ATTR_LIFETIME 10/*secs*/ |
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96 | |
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97 | /* |
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98 | * The 'st_blksize' (stat(2)) value this nfs |
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99 | * client should report. If set to zero then the server's fattr data |
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100 | * is passed throught which is not necessary optimal. |
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101 | * Newlib's stdio uses 'st_blksize' (if built with HAVE_BLKSIZE defined) |
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102 | * to size the default buffer. |
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103 | * Due to the overhead of NFS it is probably better to use the maximum |
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104 | * size of an NFS read request (8k) rather than the optimal block |
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105 | * size on the server. |
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106 | * This value can be overridden at run-time by setting the global |
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107 | * variable 'nfsStBlksize'. |
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108 | * Thanks to Steven Johnson <sjohnson@sakuraindustries.com> for helping |
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109 | * working on this issue. |
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110 | */ |
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111 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
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112 | |
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113 | /* dont change this without changing the maximal write size */ |
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114 | #define CONFIG_NFS_BIG_XACT_SIZE UDPMSGSIZE /* dont change this */ |
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115 | |
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116 | /* The real values for these are specified further down */ |
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117 | #define NFSCALL_TIMEOUT (&_nfscalltimeout) |
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118 | #define MNTCALL_TIMEOUT (&_nfscalltimeout) |
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119 | static struct timeval _nfscalltimeout = { 10, 0 }; /* {secs, us } */ |
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120 | |
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121 | /* More or less fixed constants; in particular, NFS3 is not supported */ |
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122 | #define DELIM '/' |
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123 | #define HOSTDELIM ':' |
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124 | #define UPDIR ".." |
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125 | #define UIDSEP '@' |
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126 | #define NFS_VERSION_2 NFS_VERSION |
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127 | |
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128 | /* we use a dynamically assigned major number */ |
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129 | #define NFS_MAJOR (nfsGlob.nfs_major) |
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130 | |
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131 | |
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132 | /* NOTE: RTEMS (ss-20020301) uses a 'short st_ino' type :-( but the |
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133 | * NFS fileid is 32 bit. [Later versions of RTEMS have fixed this; |
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134 | * nfsInit() issues a warning if you run a version with 'short st_ino'.] |
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135 | * |
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136 | * As a workarount, we merge the upper 16bits of the fileid into the |
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137 | * minor device no. Hence, it is still possible to uniquely identify |
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138 | * a file by looking at its device number (major = nfs, minor = part |
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139 | * of the fileid + our 'nfs-id' identifier). |
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140 | * |
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141 | * This has an impact on performance, as e.g. getcwd() stats() all |
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142 | * directory entries when it believes it has crossed a mount point |
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143 | * (a.st_dev != b.st_dev). |
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144 | * |
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145 | * OTOH, it also might cause node comparison failure! E.g. 'getcwd()' |
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146 | * assumes that two nodes residing in the same directory must be located |
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147 | * on the same device and hence compares 'st_ino' only. |
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148 | * If two files in the same directory have the same inode number |
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149 | * modulo 2^16, they will be considered equal (although their device |
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150 | * number doesn't match - getcwd doesn't look at it). |
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151 | * |
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152 | * Other software might or might not be affected. |
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153 | * |
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154 | * The only clean solution to this problem is bumping up the size of |
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155 | * 'ino_t' at least to 'long'. |
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156 | * Note that this requires _all_ software (libraries etc.) to be |
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157 | * recompiled. |
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158 | */ |
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159 | |
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160 | #define NFS_MAKE_DEV_T_INO_HACK(node) \ |
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161 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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162 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (((rtems_device_minor_number)SERP_ATTR((node)).fileid) >> 16) ) |
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163 | |
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164 | /* use our 'nfs id' and the server's fsid for the minor device number |
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165 | * this should be fairly unique |
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166 | */ |
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167 | #define NFS_MAKE_DEV_T(node) \ |
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168 | rtems_filesystem_make_dev_t( NFS_MAJOR, \ |
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169 | (((rtems_device_minor_number)((node)->nfs->id))<<16) | (SERP_ATTR((node)).fsid & (((rtems_device_minor_number)1<<16)-1)) ) |
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170 | |
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171 | #define DIRENT_HEADER_SIZE ( sizeof(struct dirent) - \ |
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172 | sizeof( ((struct dirent *)0)->d_name ) ) |
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173 | |
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174 | |
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175 | /* debugging flags */ |
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176 | #define DEBUG_COUNT_NODES (1<<0) |
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177 | #define DEBUG_TRACK_NODES (1<<1) |
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178 | #define DEBUG_EVALPATH (1<<2) |
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179 | #define DEBUG_READDIR (1<<3) |
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180 | #define DEBUG_SYSCALLS (1<<4) |
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181 | |
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182 | /* #define DEBUG ( DEBUG_SYSCALLS | DEBUG_COUNT_NODES ) */ |
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183 | |
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184 | #ifdef DEBUG |
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185 | #define STATIC |
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186 | #else |
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187 | #define STATIC static |
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188 | #endif |
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189 | |
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190 | #define MUTEX_ATTRIBUTES (RTEMS_LOCAL | \ |
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191 | RTEMS_PRIORITY | \ |
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192 | RTEMS_INHERIT_PRIORITY | \ |
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193 | RTEMS_BINARY_SEMAPHORE) |
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194 | |
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195 | #define LOCK(s) do { \ |
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196 | rtems_semaphore_obtain((s), \ |
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197 | RTEMS_WAIT, \ |
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198 | RTEMS_NO_TIMEOUT); \ |
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199 | } while (0) |
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200 | |
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201 | #define UNLOCK(s) do { rtems_semaphore_release((s)); \ |
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202 | } while (0) |
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203 | |
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204 | /***************************************** |
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205 | Types with Associated XDR Routines |
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206 | *****************************************/ |
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207 | |
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208 | /* a string buffer with a maximal length. |
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209 | * If the buffer pointer is NULL, it is updated |
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210 | * with an appropriately allocated area. |
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211 | */ |
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212 | typedef struct strbuf { |
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213 | char *buf; |
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214 | u_int max; |
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215 | } strbuf; |
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216 | |
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217 | static bool_t |
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218 | xdr_strbuf(XDR *xdrs, strbuf *obj) |
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219 | { |
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220 | return xdr_string(xdrs, &obj->buf, obj->max); |
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221 | } |
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222 | |
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223 | /* Read 'readlink' results into a 'strbuf'. |
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224 | * This is convenient as it avoids |
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225 | * one extra step of copying / lenght |
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226 | * checking. |
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227 | */ |
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228 | typedef struct readlinkres_strbuf { |
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229 | nfsstat status; |
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230 | strbuf strbuf; |
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231 | } readlinkres_strbuf; |
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232 | |
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233 | static bool_t |
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234 | xdr_readlinkres_strbuf(XDR *xdrs, readlinkres_strbuf *objp) |
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235 | { |
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236 | if ( !xdr_nfsstat(xdrs, &objp->status) ) |
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237 | return FALSE; |
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238 | |
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239 | if ( NFS_OK == objp->status ) { |
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240 | if ( !xdr_string(xdrs, &objp->strbuf.buf, objp->strbuf.max) ) |
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241 | return FALSE; |
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242 | } |
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243 | return TRUE; |
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244 | } |
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245 | |
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246 | |
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247 | /* DirInfoRec is used instead of dirresargs |
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248 | * to convert recursion into iteration. The |
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249 | * 'rpcgen'erated xdr_dirresargs ends up |
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250 | * doing nested calls when unpacking the |
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251 | * 'next' pointers. |
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252 | */ |
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253 | |
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254 | typedef struct DirInfoRec_ { |
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255 | readdirargs readdirargs; |
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256 | /* clone of the 'readdirres' fields; |
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257 | * the cookie is put into the readdirargs above |
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258 | */ |
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259 | nfsstat status; |
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260 | char *buf, *ptr; |
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261 | int len; |
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262 | bool_t eofreached; |
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263 | } DirInfoRec, *DirInfo; |
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264 | |
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265 | /* this deals with one entry / record */ |
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266 | static bool_t |
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267 | xdr_dir_info_entry(XDR *xdrs, DirInfo di) |
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268 | { |
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269 | union { |
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270 | char nambuf[NFS_MAXNAMLEN+1]; |
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271 | nfscookie cookie; |
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272 | } dummy; |
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273 | struct dirent *pde = (struct dirent *)di->ptr; |
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274 | u_int fileid; |
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275 | char *name; |
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276 | register int nlen = 0,len,naligned = 0; |
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277 | nfscookie *pcookie; |
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278 | |
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279 | len = di->len; |
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280 | |
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281 | if ( !xdr_u_int(xdrs, &fileid) ) |
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282 | return FALSE; |
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283 | |
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284 | /* we must pass the address of a char* */ |
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285 | name = (len > NFS_MAXNAMLEN) ? pde->d_name : dummy.nambuf; |
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286 | |
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287 | if ( !xdr_filename(xdrs, &name) ) { |
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288 | return FALSE; |
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289 | } |
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290 | |
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291 | if (len >= 0) { |
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292 | nlen = strlen(name); |
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293 | naligned = nlen + 1 /* string delimiter */ + 3 /* alignment */; |
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294 | naligned &= ~3; |
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295 | len -= naligned; |
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296 | } |
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297 | |
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298 | /* if the cookie goes into the DirInfo, we hope this doesn't fail |
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299 | * - the caller ends up with an invalid readdirargs cookie otherwise... |
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300 | */ |
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301 | pcookie = (len >= 0) ? &di->readdirargs.cookie : &dummy.cookie; |
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302 | if ( !xdr_nfscookie(xdrs, pcookie) ) { |
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303 | return FALSE; |
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304 | } |
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305 | |
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306 | di->len = len; |
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307 | /* adjust the buffer pointer */ |
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308 | if (len >= 0) { |
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309 | pde->d_ino = fileid; |
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310 | pde->d_namlen = nlen; |
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311 | pde->d_off = di->ptr - di->buf; |
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312 | if (name == dummy.nambuf) { |
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313 | memcpy(pde->d_name, dummy.nambuf, nlen + 1); |
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314 | } |
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315 | pde->d_reclen = DIRENT_HEADER_SIZE + naligned; |
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316 | di->ptr += pde->d_reclen; |
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317 | } |
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318 | |
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319 | return TRUE; |
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320 | } |
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321 | |
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322 | /* this routine loops over all entries */ |
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323 | static bool_t |
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324 | xdr_dir_info(XDR *xdrs, DirInfo di) |
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325 | { |
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326 | DirInfo dip; |
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327 | |
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328 | if ( !xdr_nfsstat(xdrs, &di->status) ) |
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329 | return FALSE; |
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330 | |
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331 | if ( NFS_OK != di->status ) |
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332 | return TRUE; |
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333 | |
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334 | dip = di; |
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335 | |
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336 | while (dip) { |
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337 | /* reserve space for the dirent 'header' - we assume it's word aligned! */ |
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338 | #ifdef DEBUG |
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339 | assert( DIRENT_HEADER_SIZE % 4 == 0 ); |
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340 | #endif |
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341 | dip->len -= DIRENT_HEADER_SIZE; |
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342 | |
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343 | /* we pass a 0 size - size is unused since |
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344 | * we always pass a non-NULL pointer |
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345 | */ |
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346 | if ( !xdr_pointer(xdrs, (void*)&dip, 0 /* size */, (xdrproc_t)xdr_dir_info_entry) ) |
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347 | return FALSE; |
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348 | } |
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349 | |
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350 | if ( ! xdr_bool(xdrs, &di->eofreached) ) |
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351 | return FALSE; |
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352 | |
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353 | /* if everything fits into the XDR buffer but not the user's buffer, |
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354 | * they must resume reading from where xdr_dir_info_entry() started |
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355 | * skipping and 'eofreached' needs to be adjusted |
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356 | */ |
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357 | if ( di->len < 0 && di->eofreached ) |
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358 | di->eofreached = FALSE; |
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359 | |
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360 | return TRUE; |
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361 | } |
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362 | |
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363 | |
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364 | /* a type better suited for node operations |
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365 | * than diropres. |
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366 | * fattr and fhs are swapped so parts of this |
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367 | * structure may be used as a diroparg which |
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368 | * is practical when looking up paths. |
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369 | */ |
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370 | |
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371 | /* Macro for accessing serporid fields |
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372 | */ |
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373 | #define SERP_ARGS(node) ((node)->serporid.serporid_u.serporid.arg_u) |
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374 | #define SERP_ATTR(node) ((node)->serporid.serporid_u.serporid.attributes) |
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375 | #define SERP_FILE(node) ((node)->serporid.serporid_u.serporid.file) |
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376 | |
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377 | |
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378 | typedef struct serporidok { |
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379 | fattr attributes; |
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380 | nfs_fh file; |
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381 | union { |
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382 | struct { |
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383 | filename name; |
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384 | } diroparg; |
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385 | struct { |
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386 | sattr attributes; |
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387 | } sattrarg; |
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388 | struct { |
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389 | uint32_t offset; |
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390 | uint32_t count; |
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391 | uint32_t totalcount; |
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392 | } readarg; |
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393 | struct { |
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394 | uint32_t beginoffset; |
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395 | uint32_t offset; |
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396 | uint32_t totalcount; |
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397 | struct { |
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398 | uint32_t data_len; |
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399 | char* data_val; |
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400 | } data; |
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401 | } writearg; |
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402 | struct { |
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403 | filename name; |
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404 | sattr attributes; |
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405 | } createarg; |
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406 | struct { |
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407 | filename name; |
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408 | diropargs to; |
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409 | } renamearg; |
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410 | struct { |
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411 | diropargs to; |
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412 | } linkarg; |
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413 | struct { |
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414 | filename name; |
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415 | nfspath to; |
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416 | sattr attributes; |
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417 | } symlinkarg; |
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418 | struct { |
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419 | nfscookie cookie; |
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420 | uint32_t count; |
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421 | } readdirarg; |
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422 | } arg_u; |
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423 | } serporidok; |
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424 | |
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425 | typedef struct serporid { |
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426 | nfsstat status; |
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427 | union { |
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428 | serporidok serporid; |
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429 | } serporid_u; |
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430 | } serporid; |
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431 | |
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432 | /* an XDR routine to encode/decode the inverted diropres |
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433 | * into an nfsnodestat; |
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434 | * |
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435 | * NOTE: this routine only acts on |
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436 | * - 'serporid.status' |
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437 | * - 'serporid.file' |
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438 | * - 'serporid.attributes' |
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439 | * and leaves the 'arg_u' alone. |
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440 | * |
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441 | * The idea is that a 'diropres' is read into 'serporid' |
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442 | * which can then be used as an argument to subsequent |
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443 | * NFS-RPCs (after filling in the node's arg_u). |
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444 | */ |
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445 | static bool_t |
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446 | xdr_serporidok(XDR *xdrs, serporidok *objp) |
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447 | { |
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448 | if (!xdr_nfs_fh (xdrs, &objp->file)) |
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449 | return FALSE; |
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450 | if (!xdr_fattr (xdrs, &objp->attributes)) |
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451 | return FALSE; |
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452 | return TRUE; |
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453 | } |
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454 | |
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455 | static bool_t |
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456 | xdr_serporid(XDR *xdrs, serporid *objp) |
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457 | { |
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458 | if (!xdr_nfsstat (xdrs, &objp->status)) |
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459 | return FALSE; |
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460 | switch (objp->status) { |
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461 | case NFS_OK: |
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462 | if (!xdr_serporidok(xdrs, &objp->serporid_u.serporid)) |
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463 | return FALSE; |
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464 | break; |
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465 | default: |
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466 | break; |
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467 | } |
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468 | return TRUE; |
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469 | } |
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470 | |
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471 | /***************************************** |
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472 | Data Structures and Types |
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473 | *****************************************/ |
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474 | |
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475 | /* 'time()' hack with less overhead; */ |
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476 | |
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477 | /* assume reading a long word is atomic */ |
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478 | #define READ_LONG_IS_ATOMIC |
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479 | |
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480 | typedef uint32_t TimeStamp; |
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481 | |
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482 | static inline TimeStamp |
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483 | nowSeconds(void) |
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484 | { |
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485 | rtems_interval rval; |
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486 | rtems_clock_get_seconds_since_epoch( &rval ); |
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487 | return rval; |
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488 | } |
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489 | |
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490 | |
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491 | /* Per mounted FS structure */ |
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492 | typedef struct NfsRec_ { |
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493 | /* the NFS server we're talking to. |
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494 | */ |
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495 | RpcUdpServer server; |
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496 | /* statistics; how many NfsNodes are |
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497 | * currently alive. |
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498 | */ |
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499 | volatile int nodesInUse; |
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500 | #if DEBUG & DEBUG_COUNT_NODES |
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501 | /* statistics; how many 'NfsNode.str' |
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502 | * strings are currently allocated. |
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503 | */ |
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504 | volatile int stringsInUse; |
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505 | #endif |
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506 | /* A small number who uniquely |
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507 | * identifies a mounted NFS within |
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508 | * this driver (i.e. this NfsRec). |
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509 | * Each time a NFS is mounted, the |
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510 | * global ID counter is incremented |
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511 | * and its value is assigned to the |
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512 | * newly created NfsRec. |
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513 | */ |
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514 | u_short id; |
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515 | /* Our RTEMS filesystem mt_entry |
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516 | */ |
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517 | rtems_filesystem_mount_table_entry_t *mt_entry; |
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518 | /* Next NfsRec on a linked list who |
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519 | * is anchored at nfsGlob |
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520 | */ |
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521 | struct NfsRec_ *next; |
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522 | /* Who we pretend we are |
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523 | */ |
---|
524 | u_long uid,gid; |
---|
525 | } NfsRec, *Nfs; |
---|
526 | |
---|
527 | typedef struct NfsNodeRec_ { |
---|
528 | /* This holds this node's attributes |
---|
529 | * (stats) and its nfs filehandle. |
---|
530 | * It also contains room for nfs rpc |
---|
531 | * arguments. |
---|
532 | */ |
---|
533 | serporid serporid; |
---|
534 | /* The arguments we used when doing |
---|
535 | * the 'lookup' call for this node. |
---|
536 | * We need this information (especially |
---|
537 | * the directory FH) for performing |
---|
538 | * certain operations on this |
---|
539 | * node (in particular: for unlinking |
---|
540 | * it from a parent directory) |
---|
541 | */ |
---|
542 | diropargs args; |
---|
543 | /* FS this node belongs to |
---|
544 | */ |
---|
545 | Nfs nfs; |
---|
546 | /* A buffer for the string the |
---|
547 | * args.name points to. |
---|
548 | * We need this because args.name might |
---|
549 | * temporarily point to strings on the |
---|
550 | * stack. Duplicates are allocated from |
---|
551 | * the heap and attached to 'str' so |
---|
552 | * they can be released as appropriate. |
---|
553 | */ |
---|
554 | char *str; |
---|
555 | /* A timestamp for the stats |
---|
556 | */ |
---|
557 | TimeStamp age; |
---|
558 | } NfsNodeRec, *NfsNode; |
---|
559 | |
---|
560 | /***************************************** |
---|
561 | Forward Declarations |
---|
562 | *****************************************/ |
---|
563 | |
---|
564 | static int nfs_readlink( |
---|
565 | rtems_filesystem_location_info_t *loc, /* IN */ |
---|
566 | char *buf, /* OUT */ |
---|
567 | size_t len |
---|
568 | ); |
---|
569 | |
---|
570 | static int updateAttr(NfsNode node, int force); |
---|
571 | |
---|
572 | /* Mask bits when setting attributes. |
---|
573 | * Only the 'arg' fields with their |
---|
574 | * corresponding bit set in the mask |
---|
575 | * will be used. The others are left |
---|
576 | * unchanged. |
---|
577 | * The 'TOUCH' bits instruct nfs_sattr() |
---|
578 | * to update the respective time |
---|
579 | * fields to the current time |
---|
580 | */ |
---|
581 | #define SATTR_MODE (1<<0) |
---|
582 | #define SATTR_UID (1<<1) |
---|
583 | #define SATTR_GID (1<<2) |
---|
584 | #define SATTR_SIZE (1<<3) |
---|
585 | #define SATTR_ATIME (1<<4) |
---|
586 | #define SATTR_TOUCHA (1<<5) |
---|
587 | #define SATTR_MTIME (1<<6) |
---|
588 | #define SATTR_TOUCHM (1<<7) |
---|
589 | #define SATTR_TOUCH (SATTR_TOUCHM | SATTR_TOUCHA) |
---|
590 | |
---|
591 | static int |
---|
592 | nfs_sattr(NfsNode node, sattr *arg, u_long mask); |
---|
593 | |
---|
594 | extern struct _rtems_filesystem_operations_table nfs_fs_ops; |
---|
595 | static struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers; |
---|
596 | static struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers; |
---|
597 | static struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers; |
---|
598 | static rtems_driver_address_table drvNfs; |
---|
599 | |
---|
600 | int |
---|
601 | nfsMountsShow(FILE*); |
---|
602 | |
---|
603 | rtems_status_code |
---|
604 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc); |
---|
605 | |
---|
606 | |
---|
607 | /***************************************** |
---|
608 | Inline Routines |
---|
609 | *****************************************/ |
---|
610 | |
---|
611 | |
---|
612 | /* * * * * * * * * * * * * * * * * * |
---|
613 | Trivial Operations on a NfsNode |
---|
614 | * * * * * * * * * * * * * * * * * */ |
---|
615 | |
---|
616 | /* determine if a location 'l' is an NFS root node */ |
---|
617 | static inline int |
---|
618 | locIsRoot(rtems_filesystem_location_info_t *l) |
---|
619 | { |
---|
620 | NfsNode me = (NfsNode) l->node_access; |
---|
621 | NfsNode r; |
---|
622 | r = (NfsNode)l->mt_entry->mt_fs_root.node_access; |
---|
623 | return SERP_ATTR(r).fileid == SERP_ATTR(me).fileid && |
---|
624 | SERP_ATTR(r).fsid == SERP_ATTR(me).fsid; |
---|
625 | } |
---|
626 | |
---|
627 | /* determine if a location 'l' is an NFS node */ |
---|
628 | static inline int |
---|
629 | locIsNfs(rtems_filesystem_location_info_t *l) |
---|
630 | { |
---|
631 | return l->ops == &nfs_fs_ops; |
---|
632 | } |
---|
633 | |
---|
634 | /* determine if two locations refer to the |
---|
635 | * same entity. We know that 'nfsloc' is a |
---|
636 | * location inside nfs. However, we needn't |
---|
637 | * know anything about 'anyloc'. |
---|
638 | */ |
---|
639 | static inline int |
---|
640 | locAreEqual( |
---|
641 | rtems_filesystem_location_info_t *nfsloc, |
---|
642 | rtems_filesystem_location_info_t *anyloc |
---|
643 | ) |
---|
644 | { |
---|
645 | NfsNode na = (NfsNode) nfsloc->node_access; |
---|
646 | NfsNode nb; |
---|
647 | |
---|
648 | if (!locIsNfs(anyloc)) |
---|
649 | return 0; |
---|
650 | |
---|
651 | nb = (NfsNode) anyloc->node_access; |
---|
652 | |
---|
653 | if (na->nfs != nb->nfs) |
---|
654 | return 0; |
---|
655 | |
---|
656 | updateAttr(nb, 0); |
---|
657 | |
---|
658 | return SERP_ATTR(na).fileid == SERP_ATTR(nb).fileid && |
---|
659 | SERP_ATTR(na).fsid == SERP_ATTR(nb).fsid; |
---|
660 | } |
---|
661 | |
---|
662 | |
---|
663 | |
---|
664 | /***************************************** |
---|
665 | Global Variables |
---|
666 | *****************************************/ |
---|
667 | |
---|
668 | /* These are (except for MAXNAMLEN/MAXPATHLEN) copied from IMFS */ |
---|
669 | |
---|
670 | static rtems_filesystem_limits_and_options_t |
---|
671 | nfs_limits_and_options = { |
---|
672 | 5, /* link_max */ |
---|
673 | 6, /* max_canon */ |
---|
674 | 7, /* max_input */ |
---|
675 | NFS_MAXNAMLEN, /* name_max */ |
---|
676 | NFS_MAXPATHLEN, /* path_max */ |
---|
677 | 2, /* pipe_buf */ |
---|
678 | 1, /* posix_async_io */ |
---|
679 | 2, /* posix_chown_restrictions */ |
---|
680 | 3, /* posix_no_trunc */ |
---|
681 | 4, /* posix_prio_io */ |
---|
682 | 5, /* posix_sync_io */ |
---|
683 | 6 /* posix_vdisable */ |
---|
684 | }; |
---|
685 | |
---|
686 | /* size of an encoded 'entry' object */ |
---|
687 | static int dirres_entry_size; |
---|
688 | |
---|
689 | /* Global stuff and statistics */ |
---|
690 | static struct nfsstats { |
---|
691 | /* A lock for protecting the |
---|
692 | * linked ist of mounted NFS |
---|
693 | * and the num_mounted_fs field |
---|
694 | */ |
---|
695 | rtems_id llock; |
---|
696 | /* A lock for protecting misc |
---|
697 | * stuff within the driver. |
---|
698 | * The lock must only be held |
---|
699 | * for short periods of time. |
---|
700 | */ |
---|
701 | rtems_id lock; |
---|
702 | /* Our major number as assigned |
---|
703 | * by RTEMS |
---|
704 | */ |
---|
705 | rtems_device_major_number nfs_major; |
---|
706 | /* The number of currently |
---|
707 | * mounted NFS |
---|
708 | */ |
---|
709 | int num_mounted_fs; |
---|
710 | /* A list of the currently |
---|
711 | * mounted NFS |
---|
712 | */ |
---|
713 | struct NfsRec_ *mounted_fs; |
---|
714 | /* A counter for allocating |
---|
715 | * unique IDs to each mounted |
---|
716 | * NFS. |
---|
717 | * Assume we are not going to |
---|
718 | * do more than 16k mounts |
---|
719 | * during the system lifetime |
---|
720 | */ |
---|
721 | u_short fs_ids; |
---|
722 | } nfsGlob = {0, 0, 0, 0, 0, 0}; |
---|
723 | |
---|
724 | /* |
---|
725 | * Global variable to tune the 'st_blksize' (stat(2)) value this nfs |
---|
726 | * client should report. |
---|
727 | * size on the server. |
---|
728 | */ |
---|
729 | #ifndef DEFAULT_NFS_ST_BLKSIZE |
---|
730 | #define DEFAULT_NFS_ST_BLKSIZE NFS_MAXDATA |
---|
731 | #endif |
---|
732 | int nfsStBlksize = DEFAULT_NFS_ST_BLKSIZE; |
---|
733 | |
---|
734 | /* Two pools of RPC transactions; |
---|
735 | * One with small send buffers |
---|
736 | * the other with a big one. |
---|
737 | * The actual size of the small |
---|
738 | * buffer is configurable (see top). |
---|
739 | * |
---|
740 | * Note: The RX buffers are always |
---|
741 | * big |
---|
742 | */ |
---|
743 | static RpcUdpXactPool smallPool = 0; |
---|
744 | static RpcUdpXactPool bigPool = 0; |
---|
745 | |
---|
746 | |
---|
747 | /***************************************** |
---|
748 | Implementation |
---|
749 | *****************************************/ |
---|
750 | |
---|
751 | /* Create a Nfs object. This is |
---|
752 | * per-mounted NFS information. |
---|
753 | * |
---|
754 | * ARGS: The Nfs server handle. |
---|
755 | * |
---|
756 | * RETURNS: Nfs on success, |
---|
757 | * NULL on failure with |
---|
758 | * errno set |
---|
759 | * |
---|
760 | * NOTE: The submitted server |
---|
761 | * object is 'owned' by |
---|
762 | * this Nfs and will be |
---|
763 | * destroyed by nfsDestroy() |
---|
764 | */ |
---|
765 | static Nfs |
---|
766 | nfsCreate(RpcUdpServer server) |
---|
767 | { |
---|
768 | Nfs rval = calloc(1,sizeof(*rval)); |
---|
769 | |
---|
770 | if (rval) { |
---|
771 | rval->server = server; |
---|
772 | LOCK(nfsGlob.llock); |
---|
773 | rval->next = nfsGlob.mounted_fs; |
---|
774 | nfsGlob.mounted_fs = rval; |
---|
775 | UNLOCK(nfsGlob.llock); |
---|
776 | } else { |
---|
777 | errno = ENOMEM; |
---|
778 | } |
---|
779 | return rval; |
---|
780 | } |
---|
781 | |
---|
782 | /* Destroy an Nfs object and |
---|
783 | * its associated server |
---|
784 | */ |
---|
785 | static void |
---|
786 | nfsDestroy(Nfs nfs) |
---|
787 | { |
---|
788 | register Nfs prev; |
---|
789 | if (!nfs) |
---|
790 | return; |
---|
791 | |
---|
792 | LOCK(nfsGlob.llock); |
---|
793 | if (nfs == nfsGlob.mounted_fs) |
---|
794 | nfsGlob.mounted_fs = nfs->next; |
---|
795 | else { |
---|
796 | for (prev = nfsGlob.mounted_fs; |
---|
797 | prev && prev->next != nfs; |
---|
798 | prev = prev->next) |
---|
799 | /* nothing else to do */; |
---|
800 | assert( prev ); |
---|
801 | prev->next = nfs->next; |
---|
802 | } |
---|
803 | UNLOCK(nfsGlob.llock); |
---|
804 | |
---|
805 | nfs->next = 0; /* paranoia */ |
---|
806 | rpcUdpServerDestroy(nfs->server); |
---|
807 | free(nfs); |
---|
808 | } |
---|
809 | |
---|
810 | /* |
---|
811 | * Create a Node. The node will |
---|
812 | * be associated with a particular |
---|
813 | * mounted NFS identified by 'nfs' |
---|
814 | * Optionally, a NFS file handle |
---|
815 | * may be copied into this node. |
---|
816 | * |
---|
817 | * ARGS: nfs of the NFS this node |
---|
818 | * belongs to. |
---|
819 | * NFS file handle identifying |
---|
820 | * this node. |
---|
821 | * RETURNS: node on success, |
---|
822 | * NULL on failure with errno |
---|
823 | * set. |
---|
824 | * |
---|
825 | * NOTE: The caller of this routine |
---|
826 | * is responsible for copying |
---|
827 | * a NFS file handle if she |
---|
828 | * choses to pass a NULL fh. |
---|
829 | * |
---|
830 | * The driver code assumes the |
---|
831 | * a node always has a valid |
---|
832 | * NFS filehandle and file |
---|
833 | * attributes (unless the latter |
---|
834 | * are aged). |
---|
835 | */ |
---|
836 | static NfsNode |
---|
837 | nfsNodeCreate(Nfs nfs, fhandle *fh) |
---|
838 | { |
---|
839 | NfsNode rval = malloc(sizeof(*rval)); |
---|
840 | unsigned long flags; |
---|
841 | |
---|
842 | #if DEBUG & DEBUG_TRACK_NODES |
---|
843 | fprintf(stderr,"NFS: creating a node\n"); |
---|
844 | #endif |
---|
845 | |
---|
846 | if (rval) { |
---|
847 | if (fh) |
---|
848 | memcpy( &SERP_FILE(rval), fh, sizeof(*fh) ); |
---|
849 | rtems_interrupt_disable(flags); |
---|
850 | nfs->nodesInUse++; |
---|
851 | rtems_interrupt_enable(flags); |
---|
852 | rval->nfs = nfs; |
---|
853 | rval->str = 0; |
---|
854 | } else { |
---|
855 | errno = ENOMEM; |
---|
856 | } |
---|
857 | |
---|
858 | return rval; |
---|
859 | } |
---|
860 | |
---|
861 | /* destroy a node */ |
---|
862 | static void |
---|
863 | nfsNodeDestroy(NfsNode node) |
---|
864 | { |
---|
865 | unsigned long flags; |
---|
866 | |
---|
867 | #if DEBUG & DEBUG_TRACK_NODES |
---|
868 | fprintf(stderr,"NFS: destroying a node\n"); |
---|
869 | #endif |
---|
870 | #if 0 |
---|
871 | if (!node) |
---|
872 | return; |
---|
873 | /* this probably does nothing... */ |
---|
874 | xdr_free(xdr_serporid, &node->serporid); |
---|
875 | #endif |
---|
876 | |
---|
877 | rtems_interrupt_disable(flags); |
---|
878 | node->nfs->nodesInUse--; |
---|
879 | #if DEBUG & DEBUG_COUNT_NODES |
---|
880 | if (node->str) |
---|
881 | node->nfs->stringsInUse--; |
---|
882 | #endif |
---|
883 | rtems_interrupt_enable(flags); |
---|
884 | |
---|
885 | if (node->str) |
---|
886 | free(node->str); |
---|
887 | |
---|
888 | free(node); |
---|
889 | } |
---|
890 | |
---|
891 | /* Clone a given node (AKA copy constructor), |
---|
892 | * i.e. create an exact copy. |
---|
893 | * |
---|
894 | * ARGS: node to clone |
---|
895 | * RETURNS: new node on success |
---|
896 | * NULL on failure with errno set. |
---|
897 | * |
---|
898 | * NOTE: a string attached to 'str' |
---|
899 | * is cloned as well. Outdated |
---|
900 | * attributes (of the new copy |
---|
901 | * only) will be refreshed |
---|
902 | * (if unsuccessful, this could |
---|
903 | * be a reason for failure to |
---|
904 | * clone a node). |
---|
905 | */ |
---|
906 | static NfsNode |
---|
907 | nfsNodeClone(NfsNode node) |
---|
908 | { |
---|
909 | NfsNode rval = nfsNodeCreate(node->nfs, 0); |
---|
910 | |
---|
911 | if (rval) { |
---|
912 | *rval = *node; |
---|
913 | |
---|
914 | /* must clone the string also */ |
---|
915 | if (node->str) { |
---|
916 | rval->args.name = rval->str = strdup(node->str); |
---|
917 | if (!rval->str) { |
---|
918 | errno = ENOMEM; |
---|
919 | nfsNodeDestroy(rval); |
---|
920 | return 0; |
---|
921 | } |
---|
922 | #if DEBUG & DEBUG_COUNT_NODES |
---|
923 | { unsigned long flags; |
---|
924 | rtems_interrupt_disable(flags); |
---|
925 | node->nfs->stringsInUse++; |
---|
926 | rtems_interrupt_enable(flags); |
---|
927 | } |
---|
928 | #endif |
---|
929 | } |
---|
930 | |
---|
931 | /* possibly update the stats */ |
---|
932 | if (updateAttr(rval, 0 /* only if necessary */)) { |
---|
933 | nfsNodeDestroy(rval); |
---|
934 | return 0; |
---|
935 | } |
---|
936 | } |
---|
937 | return rval; |
---|
938 | } |
---|
939 | |
---|
940 | /* Initialize the driver. |
---|
941 | * |
---|
942 | * ARGS: depth of the small and big |
---|
943 | * transaction pools, i.e. how |
---|
944 | * many transactions (buffers) |
---|
945 | * should always be kept around. |
---|
946 | * |
---|
947 | * (If more transactions are needed, |
---|
948 | * they are created and destroyed |
---|
949 | * on the fly). |
---|
950 | */ |
---|
951 | void |
---|
952 | nfsInit(int smallPoolDepth, int bigPoolDepth) |
---|
953 | { |
---|
954 | static int initialised = 0; |
---|
955 | entry dummy; |
---|
956 | rtems_status_code status; |
---|
957 | |
---|
958 | if (initialised) |
---|
959 | return; |
---|
960 | |
---|
961 | initialised = 1; |
---|
962 | |
---|
963 | fprintf(stderr, |
---|
964 | "RTEMS-NFS $Release$, " \ |
---|
965 | "Till Straumann, Stanford/SLAC/SSRL 2002, " \ |
---|
966 | "See LICENSE file for licensing info.\n"); |
---|
967 | |
---|
968 | /* Get a major number */ |
---|
969 | |
---|
970 | if (RTEMS_SUCCESSFUL != rtems_io_register_driver(0, &drvNfs, &nfsGlob.nfs_major)) { |
---|
971 | fprintf(stderr,"Registering NFS driver failed - %s\n", strerror(errno)); |
---|
972 | return; |
---|
973 | } |
---|
974 | |
---|
975 | if (0==smallPoolDepth) |
---|
976 | smallPoolDepth = 20; |
---|
977 | if (0==bigPoolDepth) |
---|
978 | bigPoolDepth = 10; |
---|
979 | |
---|
980 | /* it's crucial to zero out the 'next' pointer |
---|
981 | * because it terminates the xdr_entry recursion |
---|
982 | * |
---|
983 | * we also must make the filename some non-zero |
---|
984 | * char pointer! |
---|
985 | */ |
---|
986 | |
---|
987 | memset(&dummy, 0, sizeof(dummy)); |
---|
988 | |
---|
989 | dummy.nextentry = 0; |
---|
990 | dummy.name = "somename"; /* guess average length of a filename */ |
---|
991 | dirres_entry_size = xdr_sizeof((xdrproc_t)xdr_entry, &dummy); |
---|
992 | |
---|
993 | smallPool = rpcUdpXactPoolCreate( |
---|
994 | NFS_PROGRAM, |
---|
995 | NFS_VERSION_2, |
---|
996 | CONFIG_NFS_SMALL_XACT_SIZE, |
---|
997 | smallPoolDepth); |
---|
998 | assert( smallPool ); |
---|
999 | |
---|
1000 | bigPool = rpcUdpXactPoolCreate( |
---|
1001 | NFS_PROGRAM, |
---|
1002 | NFS_VERSION_2, |
---|
1003 | CONFIG_NFS_BIG_XACT_SIZE, |
---|
1004 | bigPoolDepth); |
---|
1005 | assert( bigPool ); |
---|
1006 | |
---|
1007 | status = rtems_semaphore_create( |
---|
1008 | rtems_build_name('N','F','S','l'), |
---|
1009 | 1, |
---|
1010 | MUTEX_ATTRIBUTES, |
---|
1011 | 0, |
---|
1012 | &nfsGlob.llock); |
---|
1013 | assert( status == RTEMS_SUCCESSFUL ); |
---|
1014 | status = rtems_semaphore_create( |
---|
1015 | rtems_build_name('N','F','S','m'), |
---|
1016 | 1, |
---|
1017 | MUTEX_ATTRIBUTES, |
---|
1018 | 0, |
---|
1019 | &nfsGlob.lock); |
---|
1020 | assert( status == RTEMS_SUCCESSFUL ); |
---|
1021 | |
---|
1022 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
1023 | fprintf(stderr, |
---|
1024 | "WARNING: Using 'short st_ino' hits performance and may fail to access/find correct files\n"); |
---|
1025 | fprintf(stderr, |
---|
1026 | "you should fix newlib's sys/stat.h - for now I'll enable a hack...\n"); |
---|
1027 | |
---|
1028 | } |
---|
1029 | } |
---|
1030 | |
---|
1031 | /* Driver cleanup code |
---|
1032 | */ |
---|
1033 | int |
---|
1034 | nfsCleanup(void) |
---|
1035 | { |
---|
1036 | rtems_id l; |
---|
1037 | int refuse; |
---|
1038 | |
---|
1039 | if (!nfsGlob.llock) { |
---|
1040 | /* registering the driver failed - let them still cleanup */ |
---|
1041 | return 0; |
---|
1042 | } |
---|
1043 | |
---|
1044 | LOCK(nfsGlob.llock); |
---|
1045 | if ( (refuse = nfsGlob.num_mounted_fs) ) { |
---|
1046 | fprintf(stderr,"Refuse to unload NFS; %i filesystems still mounted.\n", |
---|
1047 | refuse); |
---|
1048 | nfsMountsShow(stderr); |
---|
1049 | /* yes, printing is slow - but since you try to unload the driver, |
---|
1050 | * you assume nobody is using NFS, so what if they have to wait? |
---|
1051 | */ |
---|
1052 | UNLOCK(nfsGlob.llock); |
---|
1053 | return -1; |
---|
1054 | } |
---|
1055 | |
---|
1056 | rtems_semaphore_delete(nfsGlob.lock); |
---|
1057 | nfsGlob.lock = 0; |
---|
1058 | |
---|
1059 | /* hold the lock while cleaning up... */ |
---|
1060 | |
---|
1061 | rpcUdpXactPoolDestroy(smallPool); |
---|
1062 | rpcUdpXactPoolDestroy(bigPool); |
---|
1063 | l = nfsGlob.llock; |
---|
1064 | rtems_io_unregister_driver(nfsGlob.nfs_major); |
---|
1065 | |
---|
1066 | rtems_semaphore_delete(l); |
---|
1067 | nfsGlob.llock = 0; |
---|
1068 | return 0; |
---|
1069 | } |
---|
1070 | |
---|
1071 | /* NFS RPC wrapper. |
---|
1072 | * |
---|
1073 | * ARGS: srvr the NFS server we want to call |
---|
1074 | * proc the NFSPROC_xx we want to invoke |
---|
1075 | * xargs xdr routine to wrap the arguments |
---|
1076 | * pargs pointer to the argument object |
---|
1077 | * xres xdr routine to unwrap the results |
---|
1078 | * pres pointer to the result object |
---|
1079 | * |
---|
1080 | * RETURNS: 0 on success, -1 on error with errno set. |
---|
1081 | * |
---|
1082 | * NOTE: the caller assumes that errno is set to |
---|
1083 | * a nonzero value if this routine returns |
---|
1084 | * an error (nonzero return value). |
---|
1085 | * |
---|
1086 | * This routine prints RPC error messages to |
---|
1087 | * stderr. |
---|
1088 | */ |
---|
1089 | STATIC int |
---|
1090 | nfscall( |
---|
1091 | RpcUdpServer srvr, |
---|
1092 | int proc, |
---|
1093 | xdrproc_t xargs, |
---|
1094 | void * pargs, |
---|
1095 | xdrproc_t xres, |
---|
1096 | void * pres) |
---|
1097 | { |
---|
1098 | RpcUdpXact xact; |
---|
1099 | enum clnt_stat stat; |
---|
1100 | RpcUdpXactPool pool; |
---|
1101 | int rval = -1; |
---|
1102 | |
---|
1103 | |
---|
1104 | switch (proc) { |
---|
1105 | case NFSPROC_SYMLINK: |
---|
1106 | case NFSPROC_WRITE: |
---|
1107 | pool = bigPool; break; |
---|
1108 | default: pool = smallPool; break; |
---|
1109 | } |
---|
1110 | |
---|
1111 | xact = rpcUdpXactPoolGet(pool, XactGetCreate); |
---|
1112 | |
---|
1113 | if ( !xact ) { |
---|
1114 | errno = ENOMEM; |
---|
1115 | return -1; |
---|
1116 | } |
---|
1117 | |
---|
1118 | if ( RPC_SUCCESS != (stat=rpcUdpSend( |
---|
1119 | xact, |
---|
1120 | srvr, |
---|
1121 | NFSCALL_TIMEOUT, |
---|
1122 | proc, |
---|
1123 | xres, |
---|
1124 | pres, |
---|
1125 | xargs, |
---|
1126 | pargs, |
---|
1127 | 0)) || |
---|
1128 | RPC_SUCCESS != (stat=rpcUdpRcv(xact)) ) { |
---|
1129 | |
---|
1130 | fprintf(stderr, |
---|
1131 | "NFS (proc %i) - %s\n", |
---|
1132 | proc, |
---|
1133 | clnt_sperrno(stat)); |
---|
1134 | |
---|
1135 | switch (stat) { |
---|
1136 | /* TODO: this is probably not complete and/or fully accurate */ |
---|
1137 | case RPC_CANTENCODEARGS : errno = EINVAL; break; |
---|
1138 | case RPC_AUTHERROR : errno = EPERM; break; |
---|
1139 | |
---|
1140 | case RPC_CANTSEND : |
---|
1141 | case RPC_CANTRECV : /* hope they have errno set */ |
---|
1142 | case RPC_SYSTEMERROR : break; |
---|
1143 | |
---|
1144 | default : errno = EIO; break; |
---|
1145 | } |
---|
1146 | } else { |
---|
1147 | rval = 0; |
---|
1148 | } |
---|
1149 | |
---|
1150 | /* release the transaction back into the pool */ |
---|
1151 | rpcUdpXactPoolPut(xact); |
---|
1152 | |
---|
1153 | if (rval && !errno) |
---|
1154 | errno = EIO; |
---|
1155 | |
---|
1156 | return rval; |
---|
1157 | } |
---|
1158 | |
---|
1159 | /* Check the 'age' of a node's stats |
---|
1160 | * and read the attributes from the server |
---|
1161 | * if necessary. |
---|
1162 | * |
---|
1163 | * ARGS: node node to update |
---|
1164 | * force enforce updating ignoring |
---|
1165 | * the timestamp/age |
---|
1166 | * |
---|
1167 | * RETURNS: 0 on success, |
---|
1168 | * -1 on failure with errno set |
---|
1169 | */ |
---|
1170 | |
---|
1171 | static int |
---|
1172 | updateAttr(NfsNode node, int force) |
---|
1173 | { |
---|
1174 | |
---|
1175 | if (force |
---|
1176 | #ifdef CONFIG_ATTR_LIFETIME |
---|
1177 | || (nowSeconds() - node->age > CONFIG_ATTR_LIFETIME) |
---|
1178 | #endif |
---|
1179 | ) { |
---|
1180 | if ( nfscall(node->nfs->server, |
---|
1181 | NFSPROC_GETATTR, |
---|
1182 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
1183 | (xdrproc_t)xdr_attrstat, &node->serporid) ) |
---|
1184 | return -1; |
---|
1185 | |
---|
1186 | if ( NFS_OK != node->serporid.status ) { |
---|
1187 | errno = node->serporid.status; |
---|
1188 | return -1; |
---|
1189 | } |
---|
1190 | |
---|
1191 | node->age = nowSeconds(); |
---|
1192 | } |
---|
1193 | |
---|
1194 | return 0; |
---|
1195 | } |
---|
1196 | |
---|
1197 | /* |
---|
1198 | * IP address helper. |
---|
1199 | * |
---|
1200 | * initialize a sockaddr_in from a |
---|
1201 | * [<uid>'.'<gid>'@']<host>':'<path>" string and let |
---|
1202 | * pPath point to the <path> part; retrieve the optional |
---|
1203 | * uid/gids |
---|
1204 | * |
---|
1205 | * ARGS: see description above |
---|
1206 | * |
---|
1207 | * RETURNS: 0 on success, |
---|
1208 | * -1 on failure with errno set |
---|
1209 | */ |
---|
1210 | static int |
---|
1211 | buildIpAddr(u_long *puid, u_long *pgid, |
---|
1212 | char **pHost, struct sockaddr_in *psa, |
---|
1213 | char **pPath) |
---|
1214 | { |
---|
1215 | struct hostent *h; |
---|
1216 | char host[64]; |
---|
1217 | char *chpt = *pPath; |
---|
1218 | char *path; |
---|
1219 | int len; |
---|
1220 | |
---|
1221 | if ( !chpt ) { |
---|
1222 | errno = EINVAL; |
---|
1223 | return -1; |
---|
1224 | } |
---|
1225 | |
---|
1226 | /* look for the optional uid/gid */ |
---|
1227 | if ( (chpt = strchr(chpt, UIDSEP)) ) { |
---|
1228 | if ( 2 != sscanf(*pPath,"%li.%li",puid,pgid) ) { |
---|
1229 | errno = EINVAL; |
---|
1230 | return -1; |
---|
1231 | } |
---|
1232 | chpt++; |
---|
1233 | } else { |
---|
1234 | *puid = RPCIOD_DEFAULT_ID; |
---|
1235 | *pgid = RPCIOD_DEFAULT_ID; |
---|
1236 | chpt = *pPath; |
---|
1237 | } |
---|
1238 | if ( pHost ) |
---|
1239 | *pHost = chpt; |
---|
1240 | |
---|
1241 | /* split the device name which is in the form |
---|
1242 | * |
---|
1243 | * <host> ':' <path> |
---|
1244 | * |
---|
1245 | * into its components using a local buffer |
---|
1246 | */ |
---|
1247 | |
---|
1248 | if ( !(path = strchr(chpt, HOSTDELIM)) || |
---|
1249 | (len = path - chpt) >= sizeof(host) - 1 ) { |
---|
1250 | errno = EINVAL; |
---|
1251 | return -1; |
---|
1252 | } |
---|
1253 | /* point to path beyond ':' */ |
---|
1254 | path++; |
---|
1255 | |
---|
1256 | strncpy(host, chpt, len); |
---|
1257 | host[len]=0; |
---|
1258 | |
---|
1259 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
1260 | |
---|
1261 | h = gethostbyname(host); |
---|
1262 | |
---|
1263 | if ( !h ) { |
---|
1264 | errno = EINVAL; |
---|
1265 | return -1; |
---|
1266 | } |
---|
1267 | |
---|
1268 | memcpy(&psa->sin_addr, h->h_addr, sizeof (struct in_addr)); |
---|
1269 | |
---|
1270 | /* END OF NON-THREAD SAFE REGION */ |
---|
1271 | |
---|
1272 | psa->sin_family = AF_INET; |
---|
1273 | psa->sin_port = 0; |
---|
1274 | *pPath = path; |
---|
1275 | return 0; |
---|
1276 | } |
---|
1277 | |
---|
1278 | /* wrapper similar to nfscall. |
---|
1279 | * However, since it is not used |
---|
1280 | * very often, the simpler and less |
---|
1281 | * efficient rpcUdpCallRp API is used. |
---|
1282 | * |
---|
1283 | * ARGS: see 'nfscall()' above |
---|
1284 | * |
---|
1285 | * RETURNS: RPC status |
---|
1286 | */ |
---|
1287 | static enum clnt_stat |
---|
1288 | mntcall( |
---|
1289 | struct sockaddr_in *psrvr, |
---|
1290 | int proc, |
---|
1291 | xdrproc_t xargs, |
---|
1292 | void * pargs, |
---|
1293 | xdrproc_t xres, |
---|
1294 | void * pres, |
---|
1295 | u_long uid, |
---|
1296 | u_long gid) |
---|
1297 | { |
---|
1298 | #ifdef MOUNT_V1_PORT |
---|
1299 | int retry; |
---|
1300 | #endif |
---|
1301 | enum clnt_stat stat = RPC_FAILED; |
---|
1302 | |
---|
1303 | #ifdef MOUNT_V1_PORT |
---|
1304 | /* if the portmapper fails, retry a fixed port */ |
---|
1305 | for (retry = 1, psrvr->sin_port = 0, stat = RPC_FAILED; |
---|
1306 | retry >= 0 && stat; |
---|
1307 | stat && (psrvr->sin_port = htons(MOUNT_V1_PORT)), retry-- ) |
---|
1308 | #endif |
---|
1309 | stat = rpcUdpCallRp( |
---|
1310 | psrvr, |
---|
1311 | MOUNTPROG, |
---|
1312 | MOUNTVERS, |
---|
1313 | proc, |
---|
1314 | xargs, |
---|
1315 | pargs, |
---|
1316 | xres, |
---|
1317 | pres, |
---|
1318 | uid, |
---|
1319 | gid, |
---|
1320 | MNTCALL_TIMEOUT |
---|
1321 | ); |
---|
1322 | return stat; |
---|
1323 | } |
---|
1324 | |
---|
1325 | /***************************************** |
---|
1326 | RTEMS File System Operations for NFS |
---|
1327 | *****************************************/ |
---|
1328 | |
---|
1329 | #if 0 /* for reference */ |
---|
1330 | |
---|
1331 | struct rtems_filesystem_location_info_tt |
---|
1332 | { |
---|
1333 | void *node_access; |
---|
1334 | rtems_filesystem_file_handlers_r *handlers; |
---|
1335 | rtems_filesystem_operations_table *ops; |
---|
1336 | rtems_filesystem_mount_table_entry_t *mt_entry; |
---|
1337 | }; |
---|
1338 | |
---|
1339 | #endif |
---|
1340 | |
---|
1341 | /* |
---|
1342 | * Evaluate a path letting 'pathloc' travel along. |
---|
1343 | * |
---|
1344 | * The important semantics of this operation are: |
---|
1345 | * |
---|
1346 | * If this routine returns -1, the caller assumes |
---|
1347 | * pathloc to be _invalid_ and hence it will not |
---|
1348 | * invoke rtems_filesystem_freenode() on it. |
---|
1349 | * |
---|
1350 | * OTOH, if evalpath returns 0, |
---|
1351 | * rtems_filesystem_freenode() will eventually be |
---|
1352 | * called which results in our freeing the associated |
---|
1353 | * NfsNode attached to node_access. |
---|
1354 | * |
---|
1355 | * Therefore, this routine will _always_ allocate |
---|
1356 | * a NfsNode and pass it out to *pathloc (provided |
---|
1357 | * that the evaluation succeeds). |
---|
1358 | * |
---|
1359 | * However, if the evaluation finds that it has to |
---|
1360 | * step across FS boundaries (mount point or a symlink |
---|
1361 | * pointing outside), the NfsNode is destroyed |
---|
1362 | * before passing control to the new FS' evalpath_h() |
---|
1363 | * |
---|
1364 | */ |
---|
1365 | |
---|
1366 | union nfs_evalpath_arg { |
---|
1367 | int i; |
---|
1368 | const char **c; |
---|
1369 | }; |
---|
1370 | |
---|
1371 | STATIC int nfs_do_evalpath( |
---|
1372 | const char *pathname, /* IN */ |
---|
1373 | int pathnamelen, /* IN */ |
---|
1374 | union nfs_evalpath_arg *arg, |
---|
1375 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
---|
1376 | int forMake |
---|
1377 | ) |
---|
1378 | { |
---|
1379 | char *del = 0, *part; |
---|
1380 | int e = 0; |
---|
1381 | NfsNode node = pathloc->node_access; |
---|
1382 | char *p = malloc(MAXPATHLEN+1); |
---|
1383 | Nfs nfs = (Nfs)pathloc->mt_entry->fs_info; |
---|
1384 | RpcUdpServer server = nfs->server; |
---|
1385 | unsigned long flags; |
---|
1386 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1387 | unsigned long niu,siu; |
---|
1388 | #endif |
---|
1389 | |
---|
1390 | if ( !p ) { |
---|
1391 | e = ENOMEM; |
---|
1392 | goto cleanup; |
---|
1393 | } |
---|
1394 | memset(p, 0, MAXPATHLEN+1); |
---|
1395 | memcpy(p, pathname, pathnamelen); |
---|
1396 | |
---|
1397 | LOCK(nfsGlob.lock); |
---|
1398 | node = nfsNodeClone(node); |
---|
1399 | UNLOCK(nfsGlob.lock); |
---|
1400 | |
---|
1401 | /* from here on, the NFS is protected from being unmounted |
---|
1402 | * since the node refcount is > 1 |
---|
1403 | */ |
---|
1404 | |
---|
1405 | /* clone the node */ |
---|
1406 | if ( !node ) { |
---|
1407 | /* nodeClone sets errno */ |
---|
1408 | pathloc->node_access = 0; |
---|
1409 | if ( ! (e = errno) ) { |
---|
1410 | /* if we have no node, e must not be zero! */ |
---|
1411 | e = ENOMEM; |
---|
1412 | } |
---|
1413 | goto cleanup; |
---|
1414 | } |
---|
1415 | |
---|
1416 | pathloc->node_access = node; |
---|
1417 | |
---|
1418 | /* Special case: the RTEMS filesystem code |
---|
1419 | * may emit '..' on a regular file node to |
---|
1420 | * find the parent directory :-(. |
---|
1421 | * (eval.c: rtems_filesystem_evaluate_parent()) |
---|
1422 | * Try to catch this case here: |
---|
1423 | */ |
---|
1424 | if ( NFDIR != SERP_ATTR(node).type && '.'==*p && '.'==*(p+1) ) { |
---|
1425 | for ( part = p+2; '/'==*part; part++ ) |
---|
1426 | /* skip trailing '/' */; |
---|
1427 | if ( !*part ) { |
---|
1428 | /* this is it; back out dir and let them look up the dir itself... */ |
---|
1429 | memcpy( &SERP_FILE(node), |
---|
1430 | &node->args.dir, |
---|
1431 | sizeof(node->args.dir)); |
---|
1432 | *(p+1)=0; |
---|
1433 | } |
---|
1434 | } |
---|
1435 | |
---|
1436 | for (part=p; part && *part; part=del) { |
---|
1437 | |
---|
1438 | if ( NFLNK == SERP_ATTR(node).type ) { |
---|
1439 | /* follow midpath link */ |
---|
1440 | char *b = malloc(NFS_MAXPATHLEN+1); |
---|
1441 | int l; |
---|
1442 | |
---|
1443 | if (!b) { |
---|
1444 | e = ENOMEM; |
---|
1445 | goto cleanup; |
---|
1446 | } |
---|
1447 | if (nfs_readlink(pathloc, b, NFS_MAXPATHLEN+1)) { |
---|
1448 | free(b); |
---|
1449 | e = errno; |
---|
1450 | goto cleanup; |
---|
1451 | } |
---|
1452 | |
---|
1453 | /* prepend the link value to the rest of the path */ |
---|
1454 | if ( (l=strlen(b)) + strlen(part) + 1 > NFS_MAXPATHLEN ) { |
---|
1455 | free(b); |
---|
1456 | e = EINVAL; |
---|
1457 | goto cleanup; |
---|
1458 | } |
---|
1459 | /* swap string buffers and reset delimiter */ |
---|
1460 | b[l++] = DELIM; |
---|
1461 | strcpy(b+l,part); |
---|
1462 | part = b; |
---|
1463 | b = p; |
---|
1464 | p = del = part; |
---|
1465 | |
---|
1466 | free(b); |
---|
1467 | |
---|
1468 | /* back up the directory filehandle (only necessary |
---|
1469 | * if we don't back out to the root |
---|
1470 | */ |
---|
1471 | if (! (DELIM == *part) ) { |
---|
1472 | memcpy( &SERP_FILE(node), |
---|
1473 | &node->args.dir, |
---|
1474 | sizeof(node->args.dir)); |
---|
1475 | |
---|
1476 | if (updateAttr(node, 1 /* force */)) { |
---|
1477 | e = errno; |
---|
1478 | goto cleanup; |
---|
1479 | } |
---|
1480 | } |
---|
1481 | } |
---|
1482 | |
---|
1483 | /* find delimiter and eat /// sequences |
---|
1484 | * (only if we don't restart at the root) |
---|
1485 | */ |
---|
1486 | if ( DELIM != *part && (del = strchr(part, DELIM))) { |
---|
1487 | do { |
---|
1488 | *del++=0; |
---|
1489 | } while (DELIM==*del); |
---|
1490 | } |
---|
1491 | |
---|
1492 | /* refuse to backup over the root */ |
---|
1493 | if ( 0==strcmp(part,UPDIR) |
---|
1494 | && locAreEqual(pathloc, &rtems_filesystem_root) ) { |
---|
1495 | part++; |
---|
1496 | } |
---|
1497 | |
---|
1498 | /* cross mountpoint upwards */ |
---|
1499 | if ( (0==strcmp(part,UPDIR) && locIsRoot(pathloc)) /* cross mountpoint up */ |
---|
1500 | || DELIM == *part /* link starts at root */ |
---|
1501 | ) { |
---|
1502 | int rval; |
---|
1503 | |
---|
1504 | #if DEBUG & DEBUG_EVALPATH |
---|
1505 | fprintf(stderr, |
---|
1506 | "Crossing mountpoint upwards\n"); |
---|
1507 | #endif |
---|
1508 | |
---|
1509 | if (DELIM == *part) { |
---|
1510 | *pathloc = rtems_filesystem_root; |
---|
1511 | } else { |
---|
1512 | *pathloc = pathloc->mt_entry->mt_point_node; |
---|
1513 | /* re-append the rest of the path */ |
---|
1514 | if (del) |
---|
1515 | while ( 0 == *--del ) |
---|
1516 | *del = DELIM; |
---|
1517 | } |
---|
1518 | |
---|
1519 | nfsNodeDestroy(node); |
---|
1520 | |
---|
1521 | #if DEBUG & DEBUG_EVALPATH |
---|
1522 | fprintf(stderr, |
---|
1523 | "Re-evaluating '%s'\n", |
---|
1524 | part); |
---|
1525 | #endif |
---|
1526 | |
---|
1527 | if (forMake) |
---|
1528 | rval = pathloc->ops->evalformake_h(part, pathloc, arg->c); |
---|
1529 | else |
---|
1530 | rval = pathloc->ops->evalpath_h(part, strlen(part), arg->i, pathloc); |
---|
1531 | |
---|
1532 | free(p); |
---|
1533 | return rval; |
---|
1534 | } |
---|
1535 | |
---|
1536 | /* lookup one element */ |
---|
1537 | SERP_ARGS(node).diroparg.name = part; |
---|
1538 | |
---|
1539 | /* remember args / directory fh */ |
---|
1540 | memcpy( &node->args, &SERP_FILE(node), sizeof(node->args)); |
---|
1541 | |
---|
1542 | /* don't lookup the item we want to create */ |
---|
1543 | if ( forMake && (!del || !*del) ) |
---|
1544 | break; |
---|
1545 | |
---|
1546 | #if DEBUG & DEBUG_EVALPATH |
---|
1547 | fprintf(stderr,"Looking up '%s'\n",part); |
---|
1548 | #endif |
---|
1549 | |
---|
1550 | if ( nfscall(server, |
---|
1551 | NFSPROC_LOOKUP, |
---|
1552 | (xdrproc_t)xdr_diropargs, &SERP_FILE(node), |
---|
1553 | (xdrproc_t)xdr_serporid, &node->serporid) || |
---|
1554 | NFS_OK != (errno=node->serporid.status) ) { |
---|
1555 | e = errno; |
---|
1556 | goto cleanup; |
---|
1557 | } |
---|
1558 | node->age = nowSeconds(); |
---|
1559 | |
---|
1560 | #if DEBUG & DEBUG_EVALPATH |
---|
1561 | if (NFLNK == SERP_ATTR(node).type && del) { |
---|
1562 | fprintf(stderr, |
---|
1563 | "Following midpath link '%s'\n", |
---|
1564 | part); |
---|
1565 | } |
---|
1566 | #endif |
---|
1567 | |
---|
1568 | } |
---|
1569 | |
---|
1570 | if (forMake) { |
---|
1571 | /* remember the name - do this _before_ copying |
---|
1572 | * the name to local storage; the caller expects a |
---|
1573 | * pointer into pathloc |
---|
1574 | */ |
---|
1575 | assert( node->args.name ); |
---|
1576 | |
---|
1577 | *(const char**)arg = pathname + (node->args.name - p); |
---|
1578 | |
---|
1579 | #if 0 |
---|
1580 | /* restore the directory node */ |
---|
1581 | |
---|
1582 | memcpy( &SERP_FILE(node), |
---|
1583 | &node->args.dir, |
---|
1584 | sizeof(node->args.dir)); |
---|
1585 | |
---|
1586 | if ( (nfscall(nfs->server, |
---|
1587 | NFSPROC_GETATTR, |
---|
1588 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
1589 | (xdrproc_t)xdr_attrstat, &node->serporid) && !errno && (errno = EIO)) || |
---|
1590 | (NFS_OK != (errno=node->serporid.status) ) ) { |
---|
1591 | goto cleanup; |
---|
1592 | } |
---|
1593 | #endif |
---|
1594 | } |
---|
1595 | |
---|
1596 | if (locIsRoot(pathloc)) { |
---|
1597 | |
---|
1598 | /* stupid filesystem code has no 'op' for comparing nodes |
---|
1599 | * but just compares the 'node_access' pointers. |
---|
1600 | * Luckily, this is only done for comparing the root nodes. |
---|
1601 | * Hence, we never give them a copy of the root but always |
---|
1602 | * the root itself. |
---|
1603 | */ |
---|
1604 | pathloc->node_access = pathloc->mt_entry->mt_fs_root.node_access; |
---|
1605 | /* increment the 'in use' counter since we return one more |
---|
1606 | * reference to the root node |
---|
1607 | */ |
---|
1608 | rtems_interrupt_disable(flags); |
---|
1609 | nfs->nodesInUse++; |
---|
1610 | rtems_interrupt_enable(flags); |
---|
1611 | nfsNodeDestroy(node); |
---|
1612 | |
---|
1613 | |
---|
1614 | } else { |
---|
1615 | switch (SERP_ATTR(node).type) { |
---|
1616 | case NFDIR: pathloc->handlers = &nfs_dir_file_handlers; break; |
---|
1617 | case NFREG: pathloc->handlers = &nfs_file_file_handlers; break; |
---|
1618 | case NFLNK: pathloc->handlers = &nfs_link_file_handlers; break; |
---|
1619 | default: pathloc->handlers = &rtems_filesystem_null_handlers; break; |
---|
1620 | } |
---|
1621 | pathloc->node_access = node; |
---|
1622 | |
---|
1623 | /* remember the name of this directory entry */ |
---|
1624 | |
---|
1625 | if (node->args.name) { |
---|
1626 | if (node->str) { |
---|
1627 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1628 | rtems_interrupt_disable(flags); |
---|
1629 | nfs->stringsInUse--; |
---|
1630 | rtems_interrupt_enable(flags); |
---|
1631 | #endif |
---|
1632 | free(node->str); |
---|
1633 | } |
---|
1634 | node->args.name = node->str = strdup(node->args.name); |
---|
1635 | if (!node->str) { |
---|
1636 | e = ENOMEM; |
---|
1637 | goto cleanup; |
---|
1638 | } |
---|
1639 | |
---|
1640 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1641 | rtems_interrupt_disable(flags); |
---|
1642 | nfs->stringsInUse++; |
---|
1643 | rtems_interrupt_enable(flags); |
---|
1644 | #endif |
---|
1645 | } |
---|
1646 | |
---|
1647 | } |
---|
1648 | node = 0; |
---|
1649 | |
---|
1650 | e = 0; |
---|
1651 | |
---|
1652 | cleanup: |
---|
1653 | free(p); |
---|
1654 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1655 | /* cache counters; nfs may be unmounted by other thread after the last |
---|
1656 | * node is destroyed |
---|
1657 | */ |
---|
1658 | niu = nfs->nodesInUse; |
---|
1659 | siu = nfs->stringsInUse; |
---|
1660 | #endif |
---|
1661 | if (node) { |
---|
1662 | nfsNodeDestroy(node); |
---|
1663 | pathloc->node_access = 0; |
---|
1664 | } |
---|
1665 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1666 | fprintf(stderr, |
---|
1667 | "leaving evalpath, in use count is %i nodes, %i strings\n", |
---|
1668 | niu,siu); |
---|
1669 | #endif |
---|
1670 | if (e) { |
---|
1671 | #if DEBUG & DEBUG_EVALPATH |
---|
1672 | perror("Evalpath"); |
---|
1673 | #endif |
---|
1674 | rtems_set_errno_and_return_minus_one(e); |
---|
1675 | } else { |
---|
1676 | return 0; |
---|
1677 | } |
---|
1678 | } |
---|
1679 | |
---|
1680 | /* MANDATORY; may set errno=ENOSYS and return -1 */ |
---|
1681 | static int nfs_evalformake( |
---|
1682 | const char *path, /* IN */ |
---|
1683 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
---|
1684 | const char **pname /* OUT */ |
---|
1685 | ) |
---|
1686 | { |
---|
1687 | union nfs_evalpath_arg args; |
---|
1688 | args.c = pname; |
---|
1689 | |
---|
1690 | return nfs_do_evalpath(path, strlen(path), &args, pathloc, 1 /*forMake*/); |
---|
1691 | } |
---|
1692 | |
---|
1693 | static int nfs_evalpath( |
---|
1694 | const char *path, /* IN */ |
---|
1695 | size_t pathlen, /* IN */ |
---|
1696 | int flags, /* IN */ |
---|
1697 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
---|
1698 | ) |
---|
1699 | { |
---|
1700 | union nfs_evalpath_arg args; |
---|
1701 | args.i = flags; |
---|
1702 | return nfs_do_evalpath(path, pathlen, &args, pathloc, 0 /*not forMake*/); |
---|
1703 | } |
---|
1704 | |
---|
1705 | |
---|
1706 | /* create a hard link */ |
---|
1707 | |
---|
1708 | static int nfs_link( |
---|
1709 | rtems_filesystem_location_info_t *to_loc, /* IN */ |
---|
1710 | rtems_filesystem_location_info_t *parent_loc, /* IN */ |
---|
1711 | const char *name /* IN */ |
---|
1712 | ) |
---|
1713 | { |
---|
1714 | NfsNode pNode; |
---|
1715 | nfsstat status; |
---|
1716 | NfsNode tNode = to_loc->node_access; |
---|
1717 | |
---|
1718 | #if DEBUG & DEBUG_SYSCALLS |
---|
1719 | fprintf(stderr,"Creating link '%s'\n",name); |
---|
1720 | #endif |
---|
1721 | |
---|
1722 | if ( !locIsNfs(parent_loc) ) { |
---|
1723 | errno = EXDEV; |
---|
1724 | return -1; |
---|
1725 | } |
---|
1726 | |
---|
1727 | pNode = parent_loc->node_access; |
---|
1728 | if ( tNode->nfs != pNode->nfs ) { |
---|
1729 | errno = EXDEV; |
---|
1730 | return -1; |
---|
1731 | } |
---|
1732 | memcpy(&SERP_ARGS(tNode).linkarg.to.dir, |
---|
1733 | &SERP_FILE(pNode), |
---|
1734 | sizeof(SERP_FILE(pNode))); |
---|
1735 | |
---|
1736 | SERP_ARGS(tNode).linkarg.to.name = (filename)name; |
---|
1737 | |
---|
1738 | if ( nfscall(tNode->nfs->server, |
---|
1739 | NFSPROC_LINK, |
---|
1740 | (xdrproc_t)xdr_linkargs, &SERP_FILE(tNode), |
---|
1741 | (xdrproc_t)xdr_nfsstat, &status) |
---|
1742 | || (NFS_OK != (errno = status)) |
---|
1743 | ) { |
---|
1744 | #if DEBUG & DEBUG_SYSCALLS |
---|
1745 | perror("nfs_link"); |
---|
1746 | #endif |
---|
1747 | return -1; |
---|
1748 | } |
---|
1749 | |
---|
1750 | return 0; |
---|
1751 | |
---|
1752 | } |
---|
1753 | |
---|
1754 | static int nfs_do_unlink( |
---|
1755 | rtems_filesystem_location_info_t *parent_loc,/* IN */ |
---|
1756 | rtems_filesystem_location_info_t *loc, /* IN */ |
---|
1757 | int proc |
---|
1758 | ) |
---|
1759 | { |
---|
1760 | nfsstat status; |
---|
1761 | NfsNode node = loc->node_access; |
---|
1762 | Nfs nfs = node->nfs; |
---|
1763 | #if DEBUG & DEBUG_SYSCALLS |
---|
1764 | char *name = NFSPROC_REMOVE == proc ? |
---|
1765 | "nfs_unlink" : "nfs_rmdir"; |
---|
1766 | #endif |
---|
1767 | |
---|
1768 | /* The FS generics have determined that pathloc is _not_ |
---|
1769 | * a directory. Hence we may assume that the parent |
---|
1770 | * is in our NFS. |
---|
1771 | */ |
---|
1772 | |
---|
1773 | #if DEBUG & DEBUG_SYSCALLS |
---|
1774 | assert( node->args.name == node->str && node->str ); |
---|
1775 | |
---|
1776 | fprintf(stderr,"%s '%s'\n", name, node->args.name); |
---|
1777 | #endif |
---|
1778 | |
---|
1779 | if ( nfscall(nfs->server, |
---|
1780 | proc, |
---|
1781 | (xdrproc_t)xdr_diropargs, &node->args, |
---|
1782 | (xdrproc_t)xdr_nfsstat, &status) |
---|
1783 | || (NFS_OK != (errno = status)) |
---|
1784 | ) { |
---|
1785 | #if DEBUG & DEBUG_SYSCALLS |
---|
1786 | perror(name); |
---|
1787 | #endif |
---|
1788 | return -1; |
---|
1789 | } |
---|
1790 | |
---|
1791 | return 0; |
---|
1792 | } |
---|
1793 | |
---|
1794 | static int nfs_unlink( |
---|
1795 | rtems_filesystem_location_info_t *parent_loc, /* IN */ |
---|
1796 | rtems_filesystem_location_info_t *loc /* IN */ |
---|
1797 | ) |
---|
1798 | { |
---|
1799 | return nfs_do_unlink(parent_loc, loc, NFSPROC_REMOVE); |
---|
1800 | } |
---|
1801 | |
---|
1802 | static int nfs_chown( |
---|
1803 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
1804 | uid_t owner, /* IN */ |
---|
1805 | gid_t group /* IN */ |
---|
1806 | ) |
---|
1807 | { |
---|
1808 | sattr arg; |
---|
1809 | |
---|
1810 | arg.uid = owner; |
---|
1811 | arg.gid = group; |
---|
1812 | |
---|
1813 | return nfs_sattr(pathloc->node_access, &arg, SATTR_UID | SATTR_GID); |
---|
1814 | |
---|
1815 | } |
---|
1816 | |
---|
1817 | /* Cleanup the FS private info attached to pathloc->node_access */ |
---|
1818 | static int nfs_freenode( |
---|
1819 | rtems_filesystem_location_info_t *pathloc /* IN */ |
---|
1820 | ) |
---|
1821 | { |
---|
1822 | Nfs nfs = ((NfsNode)pathloc->node_access)->nfs; |
---|
1823 | |
---|
1824 | #if DEBUG & DEBUG_COUNT_NODES |
---|
1825 | /* print counts at entry where they are > 0 so 'nfs' is safe from being destroyed |
---|
1826 | * and there's no race condition |
---|
1827 | */ |
---|
1828 | fprintf(stderr, |
---|
1829 | "entering freenode, in use count is %i nodes, %i strings\n", |
---|
1830 | nfs->nodesInUse, |
---|
1831 | nfs->stringsInUse); |
---|
1832 | #endif |
---|
1833 | |
---|
1834 | /* never destroy the root node; it is released by the unmount |
---|
1835 | * code |
---|
1836 | */ |
---|
1837 | if (locIsRoot(pathloc)) { |
---|
1838 | unsigned long flags; |
---|
1839 | /* just adjust the references to the root node but |
---|
1840 | * don't really release it |
---|
1841 | */ |
---|
1842 | rtems_interrupt_disable(flags); |
---|
1843 | nfs->nodesInUse--; |
---|
1844 | rtems_interrupt_enable(flags); |
---|
1845 | } else { |
---|
1846 | nfsNodeDestroy(pathloc->node_access); |
---|
1847 | pathloc->node_access = 0; |
---|
1848 | } |
---|
1849 | return 0; |
---|
1850 | } |
---|
1851 | |
---|
1852 | /* NOTE/TODO: mounting on top of NFS is not currently supported |
---|
1853 | * |
---|
1854 | * Challenge: stateless protocol. It would be possible to |
---|
1855 | * delete mount points on the server. We would need some sort |
---|
1856 | * of a 'garbage collector' looking for dead/unreachable |
---|
1857 | * mount points and unmounting them. |
---|
1858 | * Also, the path evaluation routine would have to check |
---|
1859 | * for crossing mount points. Crossing over from one NFS |
---|
1860 | * into another NFS could probably handled iteratively |
---|
1861 | * rather than by recursion. |
---|
1862 | */ |
---|
1863 | |
---|
1864 | #ifdef DECLARE_BODY |
---|
1865 | /* This routine is called when they try to mount something |
---|
1866 | * on top of THIS filesystem, i.e. if one of our directories |
---|
1867 | * is used as a mount point |
---|
1868 | */ |
---|
1869 | static int nfs_mount( |
---|
1870 | rtems_filesystem_mount_table_entry_t *mt_entry /* in */ |
---|
1871 | )DECLARE_BODY |
---|
1872 | #else |
---|
1873 | #define nfs_mount 0 |
---|
1874 | #endif |
---|
1875 | |
---|
1876 | #ifdef DECLARE_BODY |
---|
1877 | /* This op is called when they try to unmount a FS |
---|
1878 | * from a mountpoint managed by THIS FS. |
---|
1879 | */ |
---|
1880 | static int nfs_unmount( |
---|
1881 | rtems_filesystem_mount_table_entry_t *mt_entry /* in */ |
---|
1882 | )DECLARE_BODY |
---|
1883 | #else |
---|
1884 | #define nfs_unmount 0 |
---|
1885 | #endif |
---|
1886 | |
---|
1887 | #if 0 |
---|
1888 | |
---|
1889 | /* for reference (libio.h) */ |
---|
1890 | |
---|
1891 | struct rtems_filesystem_mount_table_entry_tt { |
---|
1892 | rtems_chain_node Node; |
---|
1893 | rtems_filesystem_location_info_t mt_point_node; |
---|
1894 | rtems_filesystem_location_info_t mt_fs_root; |
---|
1895 | int options; |
---|
1896 | void *fs_info; |
---|
1897 | |
---|
1898 | rtems_filesystem_limits_and_options_t pathconf_limits_and_options; |
---|
1899 | |
---|
1900 | /* |
---|
1901 | * When someone adds a mounted filesystem on a real device, |
---|
1902 | * this will need to be used. |
---|
1903 | * |
---|
1904 | * The best option long term for this is probably an open file descriptor. |
---|
1905 | */ |
---|
1906 | char *dev; |
---|
1907 | }; |
---|
1908 | #endif |
---|
1909 | |
---|
1910 | |
---|
1911 | int rtems_nfsfs_initialize( |
---|
1912 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
1913 | const void *data |
---|
1914 | ) |
---|
1915 | { |
---|
1916 | char *host; |
---|
1917 | struct sockaddr_in saddr; |
---|
1918 | enum clnt_stat stat; |
---|
1919 | fhstatus fhstat; |
---|
1920 | u_long uid,gid; |
---|
1921 | #ifdef NFS_V2_PORT |
---|
1922 | int retry; |
---|
1923 | #endif |
---|
1924 | Nfs nfs = 0; |
---|
1925 | NfsNode rootNode = 0; |
---|
1926 | RpcUdpServer nfsServer = 0; |
---|
1927 | int e = -1; |
---|
1928 | char *path = mt_entry->dev; |
---|
1929 | |
---|
1930 | if (rpcUdpInit () < 0) { |
---|
1931 | fprintf (stderr, "error: initialising RPC\n"); |
---|
1932 | return -1; |
---|
1933 | } |
---|
1934 | |
---|
1935 | nfsInit(0, 0); |
---|
1936 | |
---|
1937 | #if 0 |
---|
1938 | printf("Trying to mount %s on %s\n",path,mntpoint); |
---|
1939 | #endif |
---|
1940 | |
---|
1941 | if ( buildIpAddr(&uid, &gid, &host, &saddr, &path) ) |
---|
1942 | return -1; |
---|
1943 | |
---|
1944 | #ifdef NFS_V2_PORT |
---|
1945 | /* if the portmapper fails, retry a fixed port */ |
---|
1946 | for (retry = 1, saddr.sin_port = 0, stat = RPC_FAILED; |
---|
1947 | retry >= 0 && stat; |
---|
1948 | stat && (saddr.sin_port = htons(NFS_V2_PORT)), retry-- ) |
---|
1949 | #endif |
---|
1950 | stat = rpcUdpServerCreate( |
---|
1951 | &saddr, |
---|
1952 | NFS_PROGRAM, |
---|
1953 | NFS_VERSION_2, |
---|
1954 | uid, |
---|
1955 | gid, |
---|
1956 | &nfsServer |
---|
1957 | ); |
---|
1958 | |
---|
1959 | if ( RPC_SUCCESS != stat ) { |
---|
1960 | fprintf(stderr, |
---|
1961 | "Unable to contact NFS server - invalid port? (%s)\n", |
---|
1962 | clnt_sperrno(stat)); |
---|
1963 | e = EPROTONOSUPPORT; |
---|
1964 | goto cleanup; |
---|
1965 | } |
---|
1966 | |
---|
1967 | |
---|
1968 | /* first, try to ping the NFS server by |
---|
1969 | * calling the NULL proc. |
---|
1970 | */ |
---|
1971 | if ( nfscall(nfsServer, |
---|
1972 | NFSPROC_NULL, |
---|
1973 | (xdrproc_t)xdr_void, 0, |
---|
1974 | (xdrproc_t)xdr_void, 0) ) { |
---|
1975 | |
---|
1976 | fputs("NFS Ping ",stderr); |
---|
1977 | fwrite(host, 1, path-host-1, stderr); |
---|
1978 | fprintf(stderr," failed: %s\n", strerror(errno)); |
---|
1979 | |
---|
1980 | e = errno ? errno : EIO; |
---|
1981 | goto cleanup; |
---|
1982 | } |
---|
1983 | |
---|
1984 | /* that seemed to work - we now try the |
---|
1985 | * actual mount |
---|
1986 | */ |
---|
1987 | |
---|
1988 | /* reuse server address but let the mntcall() |
---|
1989 | * search for the mountd's port |
---|
1990 | */ |
---|
1991 | saddr.sin_port = 0; |
---|
1992 | |
---|
1993 | stat = mntcall( &saddr, |
---|
1994 | MOUNTPROC_MNT, |
---|
1995 | (xdrproc_t)xdr_dirpath, |
---|
1996 | &path, |
---|
1997 | (xdrproc_t)xdr_fhstatus, |
---|
1998 | &fhstat, |
---|
1999 | uid, |
---|
2000 | gid ); |
---|
2001 | |
---|
2002 | if (stat) { |
---|
2003 | fprintf(stderr,"MOUNT -- %s\n",clnt_sperrno(stat)); |
---|
2004 | if ( e<=0 ) |
---|
2005 | e = EIO; |
---|
2006 | goto cleanup; |
---|
2007 | } else if (NFS_OK != (e=fhstat.fhs_status)) { |
---|
2008 | fprintf(stderr,"MOUNT: %s\n",strerror(e)); |
---|
2009 | goto cleanup; |
---|
2010 | } |
---|
2011 | |
---|
2012 | nfs = nfsCreate(nfsServer); |
---|
2013 | assert( nfs ); |
---|
2014 | nfsServer = 0; |
---|
2015 | |
---|
2016 | nfs->uid = uid; |
---|
2017 | nfs->gid = gid; |
---|
2018 | |
---|
2019 | /* that seemed to work - we now create the root node |
---|
2020 | * and we also must obtain the root node attributes |
---|
2021 | */ |
---|
2022 | rootNode = nfsNodeCreate(nfs, &fhstat.fhstatus_u.fhs_fhandle); |
---|
2023 | assert( rootNode ); |
---|
2024 | |
---|
2025 | if ( updateAttr(rootNode, 1 /* force */) ) { |
---|
2026 | e = errno; |
---|
2027 | goto cleanup; |
---|
2028 | } |
---|
2029 | |
---|
2030 | /* looks good so far */ |
---|
2031 | |
---|
2032 | mt_entry->mt_fs_root.node_access = rootNode; |
---|
2033 | |
---|
2034 | rootNode = 0; |
---|
2035 | |
---|
2036 | mt_entry->mt_fs_root.ops = &nfs_fs_ops; |
---|
2037 | mt_entry->mt_fs_root.handlers = &nfs_dir_file_handlers; |
---|
2038 | mt_entry->pathconf_limits_and_options = nfs_limits_and_options; |
---|
2039 | |
---|
2040 | LOCK(nfsGlob.llock); |
---|
2041 | nfsGlob.num_mounted_fs++; |
---|
2042 | /* allocate a new ID for this FS */ |
---|
2043 | nfs->id = nfsGlob.fs_ids++; |
---|
2044 | UNLOCK(nfsGlob.llock); |
---|
2045 | |
---|
2046 | mt_entry->fs_info = nfs; |
---|
2047 | nfs->mt_entry = mt_entry; |
---|
2048 | nfs = 0; |
---|
2049 | |
---|
2050 | e = 0; |
---|
2051 | |
---|
2052 | cleanup: |
---|
2053 | if (nfs) |
---|
2054 | nfsDestroy(nfs); |
---|
2055 | if (nfsServer) |
---|
2056 | rpcUdpServerDestroy(nfsServer); |
---|
2057 | if (rootNode) |
---|
2058 | nfsNodeDestroy(rootNode); |
---|
2059 | if (e) |
---|
2060 | rtems_set_errno_and_return_minus_one(e); |
---|
2061 | else |
---|
2062 | return 0; |
---|
2063 | } |
---|
2064 | |
---|
2065 | /* This op is called when they try to unmount THIS fs */ |
---|
2066 | STATIC int nfs_fsunmount_me( |
---|
2067 | rtems_filesystem_mount_table_entry_t *mt_entry /* in */ |
---|
2068 | ) |
---|
2069 | { |
---|
2070 | enum clnt_stat stat; |
---|
2071 | struct sockaddr_in saddr; |
---|
2072 | char *path = mt_entry->dev; |
---|
2073 | int nodesInUse; |
---|
2074 | u_long uid,gid; |
---|
2075 | int status; |
---|
2076 | |
---|
2077 | LOCK(nfsGlob.llock); |
---|
2078 | nodesInUse = ((Nfs)mt_entry->fs_info)->nodesInUse; |
---|
2079 | |
---|
2080 | if (nodesInUse > 1 /* one ref to the root node used by us */) { |
---|
2081 | UNLOCK(nfsGlob.llock); |
---|
2082 | fprintf(stderr, |
---|
2083 | "Refuse to unmount; there are still %i nodes in use (1 used by us)\n", |
---|
2084 | nodesInUse); |
---|
2085 | rtems_set_errno_and_return_minus_one(EBUSY); |
---|
2086 | } |
---|
2087 | |
---|
2088 | status = buildIpAddr(&uid, &gid, 0, &saddr, &path); |
---|
2089 | assert( !status ); |
---|
2090 | |
---|
2091 | stat = mntcall( &saddr, |
---|
2092 | MOUNTPROC_UMNT, |
---|
2093 | (xdrproc_t)xdr_dirpath, &path, |
---|
2094 | (xdrproc_t)xdr_void, 0, |
---|
2095 | uid, |
---|
2096 | gid |
---|
2097 | ); |
---|
2098 | |
---|
2099 | if (stat) { |
---|
2100 | UNLOCK(nfsGlob.llock); |
---|
2101 | fprintf(stderr,"NFS UMOUNT -- %s\n", clnt_sperrno(stat)); |
---|
2102 | errno = EIO; |
---|
2103 | return -1; |
---|
2104 | } |
---|
2105 | |
---|
2106 | nfsNodeDestroy(mt_entry->mt_fs_root.node_access); |
---|
2107 | mt_entry->mt_fs_root.node_access = 0; |
---|
2108 | |
---|
2109 | nfsDestroy(mt_entry->fs_info); |
---|
2110 | mt_entry->fs_info = 0; |
---|
2111 | |
---|
2112 | nfsGlob.num_mounted_fs--; |
---|
2113 | UNLOCK(nfsGlob.llock); |
---|
2114 | |
---|
2115 | return 0; |
---|
2116 | } |
---|
2117 | |
---|
2118 | /* OPTIONAL; may be NULL - BUT: CAUTION; mount() doesn't check |
---|
2119 | * for this handler to be present - a fs bug |
---|
2120 | * //NOTE: (10/25/2002) patch submitted and probably applied |
---|
2121 | */ |
---|
2122 | static rtems_filesystem_node_types_t nfs_node_type( |
---|
2123 | rtems_filesystem_location_info_t *pathloc /* in */ |
---|
2124 | ) |
---|
2125 | { |
---|
2126 | NfsNode node = pathloc->node_access; |
---|
2127 | |
---|
2128 | if (updateAttr(node, 0 /* only if old */)) |
---|
2129 | return -1; |
---|
2130 | |
---|
2131 | switch( SERP_ATTR(node).type ) { |
---|
2132 | default: |
---|
2133 | /* rtems has no value for 'unknown'; |
---|
2134 | */ |
---|
2135 | case NFNON: |
---|
2136 | case NFSOCK: |
---|
2137 | case NFBAD: |
---|
2138 | case NFFIFO: |
---|
2139 | break; |
---|
2140 | |
---|
2141 | |
---|
2142 | case NFREG: return RTEMS_FILESYSTEM_MEMORY_FILE; |
---|
2143 | case NFDIR: return RTEMS_FILESYSTEM_DIRECTORY; |
---|
2144 | |
---|
2145 | case NFBLK: |
---|
2146 | case NFCHR: return RTEMS_FILESYSTEM_DEVICE; |
---|
2147 | |
---|
2148 | case NFLNK: return RTEMS_FILESYSTEM_SYM_LINK; |
---|
2149 | } |
---|
2150 | return -1; |
---|
2151 | } |
---|
2152 | |
---|
2153 | static int nfs_mknod( |
---|
2154 | const char *path, /* IN */ |
---|
2155 | mode_t mode, /* IN */ |
---|
2156 | dev_t dev, /* IN */ |
---|
2157 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
---|
2158 | ) |
---|
2159 | { |
---|
2160 | |
---|
2161 | struct timeval now; |
---|
2162 | diropres res; |
---|
2163 | NfsNode node = pathloc->node_access; |
---|
2164 | mode_t type = S_IFMT & mode; |
---|
2165 | |
---|
2166 | if (type != S_IFDIR && type != S_IFREG) |
---|
2167 | rtems_set_errno_and_return_minus_one(ENOTSUP); |
---|
2168 | |
---|
2169 | #if DEBUG & DEBUG_SYSCALLS |
---|
2170 | fprintf(stderr,"nfs_mknod: creating %s\n", path); |
---|
2171 | #endif |
---|
2172 | |
---|
2173 | rtems_clock_get_tod_timeval(&now); |
---|
2174 | |
---|
2175 | SERP_ARGS(node).createarg.name = (filename)path; |
---|
2176 | SERP_ARGS(node).createarg.attributes.mode = mode; |
---|
2177 | /* TODO: either use our uid or use the Nfs credentials */ |
---|
2178 | SERP_ARGS(node).createarg.attributes.uid = 0; |
---|
2179 | SERP_ARGS(node).createarg.attributes.gid = 0; |
---|
2180 | SERP_ARGS(node).createarg.attributes.size = 0; |
---|
2181 | SERP_ARGS(node).createarg.attributes.atime.seconds = now.tv_sec; |
---|
2182 | SERP_ARGS(node).createarg.attributes.atime.useconds = now.tv_usec; |
---|
2183 | SERP_ARGS(node).createarg.attributes.mtime.seconds = now.tv_sec; |
---|
2184 | SERP_ARGS(node).createarg.attributes.mtime.useconds = now.tv_usec; |
---|
2185 | |
---|
2186 | if ( nfscall( node->nfs->server, |
---|
2187 | NFSPROC_CREATE, |
---|
2188 | (xdrproc_t)xdr_createargs, &SERP_FILE(node), |
---|
2189 | (xdrproc_t)xdr_diropres, &res) |
---|
2190 | || (NFS_OK != (errno = res.status)) ) { |
---|
2191 | #if DEBUG & DEBUG_SYSCALLS |
---|
2192 | perror("nfs_mknod"); |
---|
2193 | #endif |
---|
2194 | return -1; |
---|
2195 | } |
---|
2196 | |
---|
2197 | return 0; |
---|
2198 | } |
---|
2199 | |
---|
2200 | static int nfs_utime( |
---|
2201 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
---|
2202 | time_t actime, /* IN */ |
---|
2203 | time_t modtime /* IN */ |
---|
2204 | ) |
---|
2205 | { |
---|
2206 | sattr arg; |
---|
2207 | |
---|
2208 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
2209 | arg.atime.seconds = actime; |
---|
2210 | arg.atime.useconds = 0; |
---|
2211 | arg.mtime.seconds = modtime; |
---|
2212 | arg.mtime.useconds = 0; |
---|
2213 | |
---|
2214 | return nfs_sattr(pathloc->node_access, &arg, SATTR_ATIME | SATTR_MTIME); |
---|
2215 | } |
---|
2216 | |
---|
2217 | static int nfs_symlink( |
---|
2218 | rtems_filesystem_location_info_t *loc, /* IN */ |
---|
2219 | const char *link_name, /* IN */ |
---|
2220 | const char *node_name |
---|
2221 | ) |
---|
2222 | { |
---|
2223 | struct timeval now; |
---|
2224 | nfsstat status; |
---|
2225 | NfsNode node = loc->node_access; |
---|
2226 | |
---|
2227 | |
---|
2228 | #if DEBUG & DEBUG_SYSCALLS |
---|
2229 | fprintf(stderr,"nfs_symlink: creating %s -> %s\n", link_name, node_name); |
---|
2230 | #endif |
---|
2231 | |
---|
2232 | rtems_clock_get_tod_timeval(&now); |
---|
2233 | |
---|
2234 | SERP_ARGS(node).symlinkarg.name = (filename)link_name; |
---|
2235 | SERP_ARGS(node).symlinkarg.to = (nfspath) node_name; |
---|
2236 | |
---|
2237 | SERP_ARGS(node).symlinkarg.attributes.mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; |
---|
2238 | /* TODO */ |
---|
2239 | SERP_ARGS(node).symlinkarg.attributes.uid = 0; |
---|
2240 | SERP_ARGS(node).symlinkarg.attributes.gid = 0; |
---|
2241 | SERP_ARGS(node).symlinkarg.attributes.size = 0; |
---|
2242 | SERP_ARGS(node).symlinkarg.attributes.atime.seconds = now.tv_sec; |
---|
2243 | SERP_ARGS(node).symlinkarg.attributes.atime.useconds = now.tv_usec; |
---|
2244 | SERP_ARGS(node).symlinkarg.attributes.mtime.seconds = now.tv_sec; |
---|
2245 | SERP_ARGS(node).symlinkarg.attributes.mtime.useconds = now.tv_usec; |
---|
2246 | |
---|
2247 | if ( nfscall( node->nfs->server, |
---|
2248 | NFSPROC_SYMLINK, |
---|
2249 | (xdrproc_t)xdr_symlinkargs, &SERP_FILE(node), |
---|
2250 | (xdrproc_t)xdr_nfsstat, &status) |
---|
2251 | || (NFS_OK != (errno = status)) ) { |
---|
2252 | #if DEBUG & DEBUG_SYSCALLS |
---|
2253 | perror("nfs_symlink"); |
---|
2254 | #endif |
---|
2255 | return -1; |
---|
2256 | } |
---|
2257 | |
---|
2258 | return 0; |
---|
2259 | } |
---|
2260 | |
---|
2261 | static int nfs_do_readlink( |
---|
2262 | rtems_filesystem_location_info_t *loc, /* IN */ |
---|
2263 | strbuf *psbuf /* IN/OUT */ |
---|
2264 | ) |
---|
2265 | { |
---|
2266 | NfsNode node = loc->node_access; |
---|
2267 | Nfs nfs = node->nfs; |
---|
2268 | readlinkres_strbuf rr; |
---|
2269 | int wasAlloced; |
---|
2270 | int rval; |
---|
2271 | |
---|
2272 | rr.strbuf = *psbuf; |
---|
2273 | |
---|
2274 | wasAlloced = (0 == psbuf->buf); |
---|
2275 | |
---|
2276 | if ( (rval = nfscall(nfs->server, |
---|
2277 | NFSPROC_READLINK, |
---|
2278 | (xdrproc_t)xdr_nfs_fh, &SERP_FILE(node), |
---|
2279 | (xdrproc_t)xdr_readlinkres_strbuf, &rr)) ) { |
---|
2280 | if (wasAlloced) |
---|
2281 | xdr_free( (xdrproc_t)xdr_strbuf, (caddr_t)&rr.strbuf ); |
---|
2282 | } |
---|
2283 | |
---|
2284 | |
---|
2285 | if (NFS_OK != rr.status) { |
---|
2286 | if (wasAlloced) |
---|
2287 | xdr_free( (xdrproc_t)xdr_strbuf, (caddr_t)&rr.strbuf ); |
---|
2288 | rtems_set_errno_and_return_minus_one(rr.status); |
---|
2289 | } |
---|
2290 | |
---|
2291 | *psbuf = rr.strbuf; |
---|
2292 | |
---|
2293 | return 0; |
---|
2294 | } |
---|
2295 | |
---|
2296 | static int nfs_readlink( |
---|
2297 | rtems_filesystem_location_info_t *loc, /* IN */ |
---|
2298 | char *buf, /* OUT */ |
---|
2299 | size_t len |
---|
2300 | ) |
---|
2301 | { |
---|
2302 | strbuf sbuf; |
---|
2303 | sbuf.buf = buf; |
---|
2304 | sbuf.max = len; |
---|
2305 | |
---|
2306 | return nfs_do_readlink(loc, &sbuf); |
---|
2307 | } |
---|
2308 | |
---|
2309 | /* The semantics of this routine are: |
---|
2310 | * |
---|
2311 | * The caller submits a valid pathloc, i.e. it has |
---|
2312 | * an NfsNode attached to node_access. |
---|
2313 | * On return, pathloc points to the target node which |
---|
2314 | * may or may not be an NFS node. |
---|
2315 | * Hence, the original NFS node is released in either |
---|
2316 | * case: |
---|
2317 | * - link evaluation fails; pathloc points to no valid node |
---|
2318 | * - link evaluation success; pathloc points to a new valid |
---|
2319 | * node. If it's an NFS node, a new NfsNode will be attached |
---|
2320 | * to node_access... |
---|
2321 | */ |
---|
2322 | |
---|
2323 | #define LINKVAL_BUFLEN (MAXPATHLEN+1) |
---|
2324 | #define RVAL_ERR_BUT_DONT_FREENODE (-1) |
---|
2325 | #define RVAL_ERR_AND_DO_FREENODE ( 1) |
---|
2326 | #define RVAL_OK ( 0) |
---|
2327 | |
---|
2328 | static int nfs_eval_link( |
---|
2329 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
---|
2330 | int flags /* IN */ |
---|
2331 | ) |
---|
2332 | { |
---|
2333 | rtems_filesystem_node_types_t type; |
---|
2334 | char *buf = malloc(LINKVAL_BUFLEN); |
---|
2335 | int rval = RVAL_ERR_AND_DO_FREENODE; |
---|
2336 | |
---|
2337 | if (!buf) { |
---|
2338 | errno = ENOMEM; |
---|
2339 | goto cleanup; |
---|
2340 | } |
---|
2341 | |
---|
2342 | /* in this loop, we must not use NFS specific ops as we might |
---|
2343 | * step out of our FS during the process... |
---|
2344 | * This algorithm should actually be performed by the |
---|
2345 | * generic's evaluate_path routine :-( |
---|
2346 | * |
---|
2347 | * Unfortunately, there is no way of finding the |
---|
2348 | * directory node who contains 'pathloc', however :-( |
---|
2349 | */ |
---|
2350 | do { |
---|
2351 | /* assume the generics have verified 'pathloc' to be |
---|
2352 | * a link... |
---|
2353 | */ |
---|
2354 | if ( !pathloc->ops->readlink_h ) { |
---|
2355 | errno = ENOTSUP; |
---|
2356 | goto cleanup; |
---|
2357 | } |
---|
2358 | |
---|
2359 | if ( pathloc->ops->readlink_h(pathloc, buf, LINKVAL_BUFLEN) ) { |
---|
2360 | goto cleanup; |
---|
2361 | } |
---|
2362 | |
---|
2363 | #if DEBUG & DEBUG_EVALPATH |
---|
2364 | fprintf(stderr, "link value is '%s'\n", buf); |
---|
2365 | #endif |
---|
2366 | |
---|
2367 | /* is the link value an absolute path ? */ |
---|
2368 | if ( DELIM != *buf ) { |
---|
2369 | /* NO; a relative path */ |
---|
2370 | |
---|
2371 | /* we must backup to the link's directory - we |
---|
2372 | * know only how to do that for NFS, however. |
---|
2373 | * In this special case, we can avoid recursion. |
---|
2374 | * Otherwise (i.e. if the link is on another FS), |
---|
2375 | * we must step into its eval_link_h(). |
---|
2376 | */ |
---|
2377 | if (locIsNfs(pathloc)) { |
---|
2378 | NfsNode node = pathloc->node_access; |
---|
2379 | int err; |
---|
2380 | |
---|
2381 | memcpy( &SERP_FILE(node), |
---|
2382 | &node->args.dir, |
---|
2383 | sizeof(node->args.dir) ); |
---|
2384 | |
---|
2385 | if (updateAttr(node, 1 /* force */)) |
---|
2386 | goto cleanup; |
---|
2387 | |
---|
2388 | if (SERP_ATTR(node).type != NFDIR) { |
---|
2389 | errno = ENOTDIR; |
---|
2390 | goto cleanup; |
---|
2391 | } |
---|
2392 | |
---|
2393 | pathloc->handlers = &nfs_dir_file_handlers; |
---|
2394 | |
---|
2395 | err = nfs_evalpath(buf, strlen(buf), flags, pathloc); |
---|
2396 | |
---|
2397 | /* according to its semantics, |
---|
2398 | * nfs_evalpath cloned the node attached |
---|
2399 | * to pathloc. Hence we have to |
---|
2400 | * release the old one (referring to |
---|
2401 | * the link; the new clone has been |
---|
2402 | * updated and refers to the link _value_). |
---|
2403 | */ |
---|
2404 | nfsNodeDestroy(node); |
---|
2405 | |
---|
2406 | if (err) { |
---|
2407 | /* nfs_evalpath has set errno; |
---|
2408 | * pathloc->node_access has no |
---|
2409 | * valid node attached in this case |
---|
2410 | */ |
---|
2411 | rval = RVAL_ERR_BUT_DONT_FREENODE; |
---|
2412 | goto cleanup; |
---|
2413 | } |
---|
2414 | |
---|
2415 | } else { |
---|
2416 | if ( ! pathloc->ops->eval_link_h ) { |
---|
2417 | errno = ENOTSUP; |
---|
2418 | goto cleanup; |
---|
2419 | } |
---|
2420 | if (!pathloc->ops->eval_link_h(pathloc, flags)) { |
---|
2421 | /* FS is responsible for freeing its pathloc->node_access |
---|
2422 | * if necessary |
---|
2423 | */ |
---|
2424 | rval = RVAL_ERR_BUT_DONT_FREENODE; |
---|
2425 | goto cleanup; |
---|
2426 | } |
---|
2427 | } |
---|
2428 | } else { |
---|
2429 | /* link points to an absolute path '/xxx' */ |
---|
2430 | |
---|
2431 | /* release this node; filesystem_evaluate_path() will |
---|
2432 | * lookup a new one. |
---|
2433 | */ |
---|
2434 | rtems_filesystem_freenode(pathloc); |
---|
2435 | |
---|
2436 | if (rtems_filesystem_evaluate_path(buf, strlen(buf), flags, pathloc, 1)) { |
---|
2437 | /* If evalpath fails then there is no valid node |
---|
2438 | * attached to pathloc; hence we must not attempt |
---|
2439 | * to free the node |
---|
2440 | */ |
---|
2441 | rval = RVAL_ERR_BUT_DONT_FREENODE; |
---|
2442 | goto cleanup; |
---|
2443 | } |
---|
2444 | } |
---|
2445 | |
---|
2446 | if ( !pathloc->ops->node_type_h ) { |
---|
2447 | errno = ENOTSUP; |
---|
2448 | goto cleanup; |
---|
2449 | } |
---|
2450 | |
---|
2451 | type = pathloc->ops->node_type_h(pathloc); |
---|
2452 | |
---|
2453 | |
---|
2454 | /* I dont know what to do about hard links */ |
---|
2455 | } while ( RTEMS_FILESYSTEM_SYM_LINK == type ); |
---|
2456 | |
---|
2457 | rval = RVAL_OK; |
---|
2458 | |
---|
2459 | cleanup: |
---|
2460 | |
---|
2461 | free(buf); |
---|
2462 | |
---|
2463 | if (RVAL_ERR_AND_DO_FREENODE == rval) { |
---|
2464 | rtems_filesystem_freenode(pathloc); |
---|
2465 | return -1; |
---|
2466 | } |
---|
2467 | |
---|
2468 | return rval; |
---|
2469 | } |
---|
2470 | |
---|
2471 | |
---|
2472 | struct _rtems_filesystem_operations_table nfs_fs_ops = { |
---|
2473 | nfs_evalpath, /* MANDATORY */ |
---|
2474 | nfs_evalformake, /* MANDATORY; may set errno=ENOSYS and return -1 */ |
---|
2475 | nfs_link, /* OPTIONAL; may be NULL */ |
---|
2476 | nfs_unlink, /* OPTIONAL; may be NULL */ |
---|
2477 | nfs_node_type, /* OPTIONAL; may be NULL; BUG in mount - no test!! */ |
---|
2478 | nfs_mknod, /* OPTIONAL; may be NULL */ |
---|
2479 | nfs_chown, /* OPTIONAL; may be NULL */ |
---|
2480 | nfs_freenode, /* OPTIONAL; may be NULL; (release node_access) */ |
---|
2481 | nfs_mount, /* OPTIONAL; may be NULL */ |
---|
2482 | rtems_nfsfs_initialize, /* OPTIONAL; may be NULL -- not used anymore */ |
---|
2483 | nfs_unmount, /* OPTIONAL; may be NULL */ |
---|
2484 | nfs_fsunmount_me, /* OPTIONAL; may be NULL */ |
---|
2485 | nfs_utime, /* OPTIONAL; may be NULL */ |
---|
2486 | nfs_eval_link, /* OPTIONAL; may be NULL */ |
---|
2487 | nfs_symlink, /* OPTIONAL; may be NULL */ |
---|
2488 | nfs_readlink, /* OPTIONAL; may be NULL */ |
---|
2489 | NULL /* OPTIONAL; may be NULL */ |
---|
2490 | }; |
---|
2491 | |
---|
2492 | /***************************************** |
---|
2493 | File Handlers |
---|
2494 | |
---|
2495 | NOTE: the FS generics expect a FS' |
---|
2496 | evalpath_h() to switch the |
---|
2497 | pathloc->handlers according |
---|
2498 | to the pathloc/node's file |
---|
2499 | type. |
---|
2500 | We currently have 'file' and |
---|
2501 | 'directory' handlers and very |
---|
2502 | few 'symlink' handlers. |
---|
2503 | |
---|
2504 | The handlers for each type are |
---|
2505 | implemented or #defined ZERO |
---|
2506 | in a 'nfs_file_xxx', |
---|
2507 | 'nfs_dir_xxx', 'nfs_link_xxx' |
---|
2508 | sequence below this point. |
---|
2509 | |
---|
2510 | In some cases, a common handler, |
---|
2511 | can be used for all file types. |
---|
2512 | It is then simply called |
---|
2513 | 'nfs_xxx'. |
---|
2514 | *****************************************/ |
---|
2515 | |
---|
2516 | |
---|
2517 | #if 0 |
---|
2518 | /* from rtems/libio.h for convenience */ |
---|
2519 | struct rtems_libio_tt { |
---|
2520 | rtems_driver_name_t *driver; |
---|
2521 | off_t size; /* size of file */ |
---|
2522 | off_t offset; /* current offset into file */ |
---|
2523 | uint32_t flags; |
---|
2524 | rtems_filesystem_location_info_t pathinfo; |
---|
2525 | Objects_Id sem; |
---|
2526 | uint32_t data0; /* private to "driver" */ |
---|
2527 | void *data1; /* ... */ |
---|
2528 | void *file_info; /* used by file handlers */ |
---|
2529 | rtems_filesystem_file_handlers_r *handlers; /* type specific handlers */ |
---|
2530 | }; |
---|
2531 | #endif |
---|
2532 | |
---|
2533 | /* stateless NFS protocol makes this trivial */ |
---|
2534 | static int nfs_file_open( |
---|
2535 | rtems_libio_t *iop, |
---|
2536 | const char *pathname, |
---|
2537 | uint32_t flag, |
---|
2538 | uint32_t mode |
---|
2539 | ) |
---|
2540 | { |
---|
2541 | iop->file_info = 0; |
---|
2542 | return 0; |
---|
2543 | } |
---|
2544 | |
---|
2545 | /* reading directories is not stateless; we must |
---|
2546 | * remember the last 'read' position, i.e. |
---|
2547 | * the server 'cookie'. We do manage this information |
---|
2548 | * attached to the iop->file_info. |
---|
2549 | */ |
---|
2550 | static int nfs_dir_open( |
---|
2551 | rtems_libio_t *iop, |
---|
2552 | const char *pathname, |
---|
2553 | uint32_t flag, |
---|
2554 | uint32_t mode |
---|
2555 | ) |
---|
2556 | { |
---|
2557 | NfsNode node = iop->pathinfo.node_access; |
---|
2558 | DirInfo di; |
---|
2559 | |
---|
2560 | /* create a readdirargs object and copy the file handle; |
---|
2561 | * attach to the file_info. |
---|
2562 | */ |
---|
2563 | |
---|
2564 | di = (DirInfo) malloc(sizeof(*di)); |
---|
2565 | iop->file_info = di; |
---|
2566 | |
---|
2567 | if ( !di ) { |
---|
2568 | errno = ENOMEM; |
---|
2569 | return -1; |
---|
2570 | } |
---|
2571 | |
---|
2572 | memcpy( &di->readdirargs.dir, |
---|
2573 | &SERP_FILE(node), |
---|
2574 | sizeof(di->readdirargs.dir) ); |
---|
2575 | |
---|
2576 | /* rewind cookie */ |
---|
2577 | memset( &di->readdirargs.cookie, |
---|
2578 | 0, |
---|
2579 | sizeof(di->readdirargs.cookie) ); |
---|
2580 | |
---|
2581 | di->eofreached = FALSE; |
---|
2582 | |
---|
2583 | return 0; |
---|
2584 | } |
---|
2585 | |
---|
2586 | #define nfs_link_open 0 |
---|
2587 | |
---|
2588 | static int nfs_file_close( |
---|
2589 | rtems_libio_t *iop |
---|
2590 | ) |
---|
2591 | { |
---|
2592 | return 0; |
---|
2593 | } |
---|
2594 | |
---|
2595 | static int nfs_dir_close( |
---|
2596 | rtems_libio_t *iop |
---|
2597 | ) |
---|
2598 | { |
---|
2599 | free(iop->file_info); |
---|
2600 | iop->file_info = 0; |
---|
2601 | return 0; |
---|
2602 | } |
---|
2603 | |
---|
2604 | #define nfs_link_close 0 |
---|
2605 | |
---|
2606 | static ssize_t nfs_file_read( |
---|
2607 | rtems_libio_t *iop, |
---|
2608 | void *buffer, |
---|
2609 | size_t count |
---|
2610 | ) |
---|
2611 | { |
---|
2612 | readres rr; |
---|
2613 | NfsNode node = iop->pathinfo.node_access; |
---|
2614 | Nfs nfs = node->nfs; |
---|
2615 | |
---|
2616 | if (count > NFS_MAXDATA) |
---|
2617 | count = NFS_MAXDATA; |
---|
2618 | |
---|
2619 | SERP_ARGS(node).readarg.offset = iop->offset; |
---|
2620 | SERP_ARGS(node).readarg.count = count; |
---|
2621 | SERP_ARGS(node).readarg.totalcount = UINT32_C(0xdeadbeef); |
---|
2622 | |
---|
2623 | rr.readres_u.reply.data.data_val = buffer; |
---|
2624 | |
---|
2625 | if ( nfscall( nfs->server, |
---|
2626 | NFSPROC_READ, |
---|
2627 | (xdrproc_t)xdr_readargs, &SERP_FILE(node), |
---|
2628 | (xdrproc_t)xdr_readres, &rr) ) { |
---|
2629 | return -1; |
---|
2630 | } |
---|
2631 | |
---|
2632 | |
---|
2633 | if (NFS_OK != rr.status) { |
---|
2634 | rtems_set_errno_and_return_minus_one(rr.status); |
---|
2635 | } |
---|
2636 | |
---|
2637 | #if DEBUG & DEBUG_SYSCALLS |
---|
2638 | fprintf(stderr, |
---|
2639 | "Read %i (asked for %i) bytes from offset %i to 0x%08x\n", |
---|
2640 | rr.readres_u.reply.data.data_len, |
---|
2641 | count, |
---|
2642 | iop->offset, |
---|
2643 | rr.readres_u.reply.data.data_val); |
---|
2644 | #endif |
---|
2645 | |
---|
2646 | |
---|
2647 | return rr.readres_u.reply.data.data_len; |
---|
2648 | } |
---|
2649 | |
---|
2650 | /* this is called by readdir() / getdents() */ |
---|
2651 | static ssize_t nfs_dir_read( |
---|
2652 | rtems_libio_t *iop, |
---|
2653 | void *buffer, |
---|
2654 | size_t count |
---|
2655 | ) |
---|
2656 | { |
---|
2657 | DirInfo di = iop->file_info; |
---|
2658 | RpcUdpServer server = ((Nfs)iop->pathinfo.mt_entry->fs_info)->server; |
---|
2659 | |
---|
2660 | if ( di->eofreached ) |
---|
2661 | return 0; |
---|
2662 | |
---|
2663 | di->ptr = di->buf = buffer; |
---|
2664 | |
---|
2665 | /* align + round down the buffer */ |
---|
2666 | count &= ~ (DIRENT_HEADER_SIZE - 1); |
---|
2667 | di->len = count; |
---|
2668 | |
---|
2669 | #if 0 |
---|
2670 | /* now estimate the number of entries we should ask for */ |
---|
2671 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2672 | |
---|
2673 | /* estimate the encoded size that might take up */ |
---|
2674 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2675 | #else |
---|
2676 | /* integer arithmetics are better done the other way round */ |
---|
2677 | count *= dirres_entry_size + CONFIG_AVG_NAMLEN; |
---|
2678 | count /= DIRENT_HEADER_SIZE + CONFIG_AVG_NAMLEN; |
---|
2679 | #endif |
---|
2680 | |
---|
2681 | if (count > NFS_MAXDATA) |
---|
2682 | count = NFS_MAXDATA; |
---|
2683 | |
---|
2684 | di->readdirargs.count = count; |
---|
2685 | |
---|
2686 | #if DEBUG & DEBUG_READDIR |
---|
2687 | fprintf(stderr, |
---|
2688 | "Readdir: asking for %i XDR bytes, buffer is %i\n", |
---|
2689 | count, di->len); |
---|
2690 | #endif |
---|
2691 | |
---|
2692 | if ( nfscall( |
---|
2693 | server, |
---|
2694 | NFSPROC_READDIR, |
---|
2695 | (xdrproc_t)xdr_readdirargs, &di->readdirargs, |
---|
2696 | (xdrproc_t)xdr_dir_info, di) ) { |
---|
2697 | return -1; |
---|
2698 | } |
---|
2699 | |
---|
2700 | |
---|
2701 | if (NFS_OK != di->status) { |
---|
2702 | rtems_set_errno_and_return_minus_one(di->status); |
---|
2703 | } |
---|
2704 | |
---|
2705 | return (char*)di->ptr - (char*)buffer; |
---|
2706 | } |
---|
2707 | |
---|
2708 | #define nfs_link_read 0 |
---|
2709 | |
---|
2710 | static ssize_t nfs_file_write( |
---|
2711 | rtems_libio_t *iop, |
---|
2712 | const void *buffer, |
---|
2713 | size_t count |
---|
2714 | ) |
---|
2715 | { |
---|
2716 | NfsNode node = iop->pathinfo.node_access; |
---|
2717 | Nfs nfs = node->nfs; |
---|
2718 | int e; |
---|
2719 | |
---|
2720 | if (count > NFS_MAXDATA) |
---|
2721 | count = NFS_MAXDATA; |
---|
2722 | |
---|
2723 | |
---|
2724 | SERP_ARGS(node).writearg.beginoffset = UINT32_C(0xdeadbeef); |
---|
2725 | if ( LIBIO_FLAGS_APPEND & iop->flags ) { |
---|
2726 | if ( updateAttr(node, 0) ) { |
---|
2727 | return -1; |
---|
2728 | } |
---|
2729 | SERP_ARGS(node).writearg.offset = SERP_ATTR(node).size; |
---|
2730 | } else { |
---|
2731 | SERP_ARGS(node).writearg.offset = iop->offset; |
---|
2732 | } |
---|
2733 | SERP_ARGS(node).writearg.totalcount = UINT32_C(0xdeadbeef); |
---|
2734 | SERP_ARGS(node).writearg.data.data_len = count; |
---|
2735 | SERP_ARGS(node).writearg.data.data_val = (void*)buffer; |
---|
2736 | |
---|
2737 | /* write XDR buffer size will be chosen by nfscall based |
---|
2738 | * on the PROC specifier |
---|
2739 | */ |
---|
2740 | |
---|
2741 | if ( nfscall( nfs->server, |
---|
2742 | NFSPROC_WRITE, |
---|
2743 | (xdrproc_t)xdr_writeargs, &SERP_FILE(node), |
---|
2744 | (xdrproc_t)xdr_attrstat, &node->serporid) ) { |
---|
2745 | return -1; |
---|
2746 | } |
---|
2747 | |
---|
2748 | |
---|
2749 | if (NFS_OK != (e=node->serporid.status) ) { |
---|
2750 | /* try at least to recover the current attributes */ |
---|
2751 | updateAttr(node, 1 /* force */); |
---|
2752 | rtems_set_errno_and_return_minus_one(e); |
---|
2753 | } |
---|
2754 | |
---|
2755 | node->age = nowSeconds(); |
---|
2756 | |
---|
2757 | return count; |
---|
2758 | } |
---|
2759 | |
---|
2760 | #define nfs_dir_write 0 |
---|
2761 | #define nfs_link_write 0 |
---|
2762 | |
---|
2763 | /* IOCTL is unneeded/unsupported */ |
---|
2764 | #ifdef DECLARE_BODY |
---|
2765 | static int nfs_file_ioctl( |
---|
2766 | rtems_libio_t *iop, |
---|
2767 | uint32_t command, |
---|
2768 | void *buffer |
---|
2769 | )DECLARE_BODY |
---|
2770 | #else |
---|
2771 | #define nfs_file_ioctl 0 |
---|
2772 | #define nfs_dir_ioctl 0 |
---|
2773 | #define nfs_link_ioctl 0 |
---|
2774 | #endif |
---|
2775 | |
---|
2776 | static rtems_off64_t nfs_file_lseek( |
---|
2777 | rtems_libio_t *iop, |
---|
2778 | rtems_off64_t length, |
---|
2779 | int whence |
---|
2780 | ) |
---|
2781 | { |
---|
2782 | #if DEBUG & DEBUG_SYSCALLS |
---|
2783 | fprintf(stderr, |
---|
2784 | "lseek to %i (length %i, whence %i)\n", |
---|
2785 | iop->offset, |
---|
2786 | length, |
---|
2787 | whence); |
---|
2788 | #endif |
---|
2789 | if ( SEEK_END == whence ) { |
---|
2790 | /* rtems (4.6.2) libcsupport code 'lseek' uses iop->size to |
---|
2791 | * compute the offset. We don't want to track the file size |
---|
2792 | * by updating 'iop->size' constantly. |
---|
2793 | * Since lseek is the only place using iop->size, we work |
---|
2794 | * around this by tweaking the offset here... |
---|
2795 | */ |
---|
2796 | NfsNode node = iop->pathinfo.node_access; |
---|
2797 | fattr *fa = &SERP_ATTR(node); |
---|
2798 | |
---|
2799 | if (updateAttr(node, 0 /* only if old */)) { |
---|
2800 | return -1; |
---|
2801 | } |
---|
2802 | iop->offset = fa->size; |
---|
2803 | } |
---|
2804 | |
---|
2805 | /* this is particularly easy :-) */ |
---|
2806 | return iop->offset; |
---|
2807 | } |
---|
2808 | |
---|
2809 | static rtems_off64_t nfs_dir_lseek( |
---|
2810 | rtems_libio_t *iop, |
---|
2811 | rtems_off64_t length, |
---|
2812 | int whence |
---|
2813 | ) |
---|
2814 | { |
---|
2815 | DirInfo di = iop->file_info; |
---|
2816 | |
---|
2817 | /* we don't support anything other than |
---|
2818 | * rewinding |
---|
2819 | */ |
---|
2820 | if (SEEK_SET != whence || 0 != length) { |
---|
2821 | errno = ENOTSUP; |
---|
2822 | return -1; |
---|
2823 | } |
---|
2824 | |
---|
2825 | /* rewind cookie */ |
---|
2826 | memset( &di->readdirargs.cookie, |
---|
2827 | 0, |
---|
2828 | sizeof(di->readdirargs.cookie) ); |
---|
2829 | |
---|
2830 | di->eofreached = FALSE; |
---|
2831 | |
---|
2832 | return iop->offset; |
---|
2833 | } |
---|
2834 | |
---|
2835 | #define nfs_link_lseek 0 |
---|
2836 | |
---|
2837 | #if 0 /* structure types for reference */ |
---|
2838 | struct fattr { |
---|
2839 | ftype type; |
---|
2840 | u_int mode; |
---|
2841 | u_int nlink; |
---|
2842 | u_int uid; |
---|
2843 | u_int gid; |
---|
2844 | u_int size; |
---|
2845 | u_int blocksize; |
---|
2846 | u_int rdev; |
---|
2847 | u_int blocks; |
---|
2848 | u_int fsid; |
---|
2849 | u_int fileid; |
---|
2850 | nfstime atime; |
---|
2851 | nfstime mtime; |
---|
2852 | nfstime ctime; |
---|
2853 | }; |
---|
2854 | |
---|
2855 | struct stat |
---|
2856 | { |
---|
2857 | dev_t st_dev; |
---|
2858 | ino_t st_ino; |
---|
2859 | mode_t st_mode; |
---|
2860 | nlink_t st_nlink; |
---|
2861 | uid_t st_uid; |
---|
2862 | gid_t st_gid; |
---|
2863 | dev_t st_rdev; |
---|
2864 | rtems_off64_t st_size; |
---|
2865 | /* SysV/sco doesn't have the rest... But Solaris, eabi does. */ |
---|
2866 | #if defined(__svr4__) && !defined(__PPC__) && !defined(__sun__) |
---|
2867 | time_t st_atime; |
---|
2868 | time_t st_mtime; |
---|
2869 | time_t st_ctime; |
---|
2870 | #else |
---|
2871 | time_t st_atime; |
---|
2872 | long st_spare1; |
---|
2873 | time_t st_mtime; |
---|
2874 | long st_spare2; |
---|
2875 | time_t st_ctime; |
---|
2876 | long st_spare3; |
---|
2877 | long st_blksize; |
---|
2878 | long st_blocks; |
---|
2879 | long st_spare4[2]; |
---|
2880 | #endif |
---|
2881 | }; |
---|
2882 | #endif |
---|
2883 | |
---|
2884 | /* common for file/dir/link */ |
---|
2885 | static int nfs_fstat( |
---|
2886 | rtems_filesystem_location_info_t *loc, |
---|
2887 | struct stat *buf |
---|
2888 | ) |
---|
2889 | { |
---|
2890 | NfsNode node = loc->node_access; |
---|
2891 | fattr *fa = &SERP_ATTR(node); |
---|
2892 | |
---|
2893 | if (updateAttr(node, 0 /* only if old */)) { |
---|
2894 | return -1; |
---|
2895 | } |
---|
2896 | |
---|
2897 | /* done by caller |
---|
2898 | memset(buf, 0, sizeof(*buf)); |
---|
2899 | */ |
---|
2900 | |
---|
2901 | /* translate */ |
---|
2902 | |
---|
2903 | /* one of the branches hopefully is optimized away */ |
---|
2904 | if (sizeof(ino_t) < sizeof(u_int)) { |
---|
2905 | buf->st_dev = NFS_MAKE_DEV_T_INO_HACK((NfsNode)loc->node_access); |
---|
2906 | } else { |
---|
2907 | buf->st_dev = NFS_MAKE_DEV_T((NfsNode)loc->node_access); |
---|
2908 | } |
---|
2909 | buf->st_mode = fa->mode; |
---|
2910 | buf->st_nlink = fa->nlink; |
---|
2911 | buf->st_uid = fa->uid; |
---|
2912 | buf->st_gid = fa->gid; |
---|
2913 | buf->st_size = fa->size; |
---|
2914 | /* Set to "preferred size" of this NFS client implementation */ |
---|
2915 | buf->st_blksize = nfsStBlksize ? nfsStBlksize : fa->blocksize; |
---|
2916 | buf->st_rdev = fa->rdev; |
---|
2917 | buf->st_blocks = fa->blocks; |
---|
2918 | buf->st_ino = fa->fileid; |
---|
2919 | buf->st_atime = fa->atime.seconds; |
---|
2920 | buf->st_mtime = fa->mtime.seconds; |
---|
2921 | buf->st_ctime = fa->ctime.seconds; |
---|
2922 | |
---|
2923 | #if 0 /* NFS should return the modes */ |
---|
2924 | switch(fa->type) { |
---|
2925 | default: |
---|
2926 | case NFNON: |
---|
2927 | case NFBAD: |
---|
2928 | break; |
---|
2929 | |
---|
2930 | case NFSOCK: buf->st_mode |= S_IFSOCK; break; |
---|
2931 | case NFFIFO: buf->st_mode |= S_IFIFO; break; |
---|
2932 | case NFREG : buf->st_mode |= S_IFREG; break; |
---|
2933 | case NFDIR : buf->st_mode |= S_IFDIR; break; |
---|
2934 | case NFBLK : buf->st_mode |= S_IFBLK; break; |
---|
2935 | case NFCHR : buf->st_mode |= S_IFCHR; break; |
---|
2936 | case NFLNK : buf->st_mode |= S_IFLNK; break; |
---|
2937 | } |
---|
2938 | #endif |
---|
2939 | |
---|
2940 | return 0; |
---|
2941 | } |
---|
2942 | |
---|
2943 | /* a helper which does the real work for |
---|
2944 | * a couple of handlers (such as chmod, |
---|
2945 | * ftruncate or utime) |
---|
2946 | */ |
---|
2947 | static int |
---|
2948 | nfs_sattr(NfsNode node, sattr *arg, u_long mask) |
---|
2949 | { |
---|
2950 | |
---|
2951 | struct timeval now; |
---|
2952 | nfstime nfsnow, t; |
---|
2953 | int e; |
---|
2954 | u_int mode; |
---|
2955 | |
---|
2956 | if (updateAttr(node, 0 /* only if old */)) |
---|
2957 | return -1; |
---|
2958 | |
---|
2959 | rtems_clock_get_tod_timeval(&now); |
---|
2960 | |
---|
2961 | /* TODO: add rtems EPOCH - UNIX EPOCH seconds */ |
---|
2962 | nfsnow.seconds = now.tv_sec; |
---|
2963 | nfsnow.useconds = now.tv_usec; |
---|
2964 | |
---|
2965 | /* merge permission bits into existing type bits */ |
---|
2966 | mode = SERP_ATTR(node).mode; |
---|
2967 | if (mask & SATTR_MODE) { |
---|
2968 | mode &= S_IFMT; |
---|
2969 | mode |= arg->mode & ~S_IFMT; |
---|
2970 | } else { |
---|
2971 | mode = -1; |
---|
2972 | } |
---|
2973 | SERP_ARGS(node).sattrarg.attributes.mode = mode; |
---|
2974 | |
---|
2975 | SERP_ARGS(node).sattrarg.attributes.uid = |
---|
2976 | (mask & SATTR_UID) ? arg->uid : -1; |
---|
2977 | |
---|
2978 | SERP_ARGS(node).sattrarg.attributes.gid = |
---|
2979 | (mask & SATTR_GID) ? arg->gid : -1; |
---|
2980 | |
---|
2981 | SERP_ARGS(node).sattrarg.attributes.size = |
---|
2982 | (mask & SATTR_SIZE) ? arg->size : -1; |
---|
2983 | |
---|
2984 | if (mask & SATTR_ATIME) |
---|
2985 | t = arg->atime; |
---|
2986 | else if (mask & SATTR_TOUCHA) |
---|
2987 | t = nfsnow; |
---|
2988 | else |
---|
2989 | t.seconds = t.useconds = -1; |
---|
2990 | SERP_ARGS(node).sattrarg.attributes.atime = t; |
---|
2991 | |
---|
2992 | if (mask & SATTR_ATIME) |
---|
2993 | t = arg->mtime; |
---|
2994 | else if (mask & SATTR_TOUCHA) |
---|
2995 | t = nfsnow; |
---|
2996 | else |
---|
2997 | t.seconds = t.useconds = -1; |
---|
2998 | SERP_ARGS(node).sattrarg.attributes.mtime = t; |
---|
2999 | |
---|
3000 | node->serporid.status = NFS_OK; |
---|
3001 | |
---|
3002 | if ( nfscall( node->nfs->server, |
---|
3003 | NFSPROC_SETATTR, |
---|
3004 | (xdrproc_t)xdr_sattrargs, &SERP_FILE(node), |
---|
3005 | (xdrproc_t)xdr_attrstat, &node->serporid) ) { |
---|
3006 | #if DEBUG & DEBUG_SYSCALLS |
---|
3007 | fprintf(stderr, |
---|
3008 | "nfs_sattr (mask 0x%08x): %s", |
---|
3009 | mask, |
---|
3010 | strerror(errno)); |
---|
3011 | #endif |
---|
3012 | return -1; |
---|
3013 | } |
---|
3014 | |
---|
3015 | if (NFS_OK != (e=node->serporid.status) ) { |
---|
3016 | #if DEBUG & DEBUG_SYSCALLS |
---|
3017 | fprintf(stderr,"nfs_sattr: %s\n",strerror(e)); |
---|
3018 | #endif |
---|
3019 | /* try at least to recover the current attributes */ |
---|
3020 | updateAttr(node, 1 /* force */); |
---|
3021 | rtems_set_errno_and_return_minus_one(e); |
---|
3022 | } |
---|
3023 | |
---|
3024 | node->age = nowSeconds(); |
---|
3025 | |
---|
3026 | return 0; |
---|
3027 | } |
---|
3028 | |
---|
3029 | |
---|
3030 | /* common for file/dir/link */ |
---|
3031 | static int nfs_fchmod( |
---|
3032 | rtems_filesystem_location_info_t *loc, |
---|
3033 | mode_t mode |
---|
3034 | ) |
---|
3035 | { |
---|
3036 | sattr arg; |
---|
3037 | |
---|
3038 | arg.mode = mode; |
---|
3039 | return nfs_sattr(loc->node_access, &arg, SATTR_MODE); |
---|
3040 | |
---|
3041 | } |
---|
3042 | |
---|
3043 | /* just set the size attribute to 'length' |
---|
3044 | * the server will take care of the rest :-) |
---|
3045 | */ |
---|
3046 | static int nfs_file_ftruncate( |
---|
3047 | rtems_libio_t *iop, |
---|
3048 | rtems_off64_t length |
---|
3049 | ) |
---|
3050 | { |
---|
3051 | sattr arg; |
---|
3052 | |
---|
3053 | arg.size = length; |
---|
3054 | /* must not modify any other attribute; if we are not the owner |
---|
3055 | * of the file or directory but only have write access changing |
---|
3056 | * any attribute besides 'size' will fail... |
---|
3057 | */ |
---|
3058 | return nfs_sattr(iop->pathinfo.node_access, |
---|
3059 | &arg, |
---|
3060 | SATTR_SIZE); |
---|
3061 | } |
---|
3062 | |
---|
3063 | #define nfs_dir_ftruncate 0 |
---|
3064 | #define nfs_link_ftruncate 0 |
---|
3065 | |
---|
3066 | /* not implemented */ |
---|
3067 | #ifdef DECLARE_BODY |
---|
3068 | static int nfs_file_fpathconf( |
---|
3069 | rtems_libio_t *iop, |
---|
3070 | int name |
---|
3071 | )DECLARE_BODY |
---|
3072 | #else |
---|
3073 | #define nfs_file_fpathconf 0 |
---|
3074 | #define nfs_dir_fpathconf 0 |
---|
3075 | #define nfs_link_fpathconf 0 |
---|
3076 | #endif |
---|
3077 | |
---|
3078 | /* unused */ |
---|
3079 | #ifdef DECLARE_BODY |
---|
3080 | static int nfs_file_fsync( |
---|
3081 | rtems_libio_t *iop |
---|
3082 | )DECLARE_BODY |
---|
3083 | #else |
---|
3084 | #define nfs_file_fsync 0 |
---|
3085 | #define nfs_dir_fsync 0 |
---|
3086 | #define nfs_link_fsync 0 |
---|
3087 | #endif |
---|
3088 | |
---|
3089 | /* unused */ |
---|
3090 | #ifdef DECLARE_BODY |
---|
3091 | static int nfs_file_fdatasync( |
---|
3092 | rtems_libio_t *iop |
---|
3093 | )DECLARE_BODY |
---|
3094 | #else |
---|
3095 | #define nfs_file_fdatasync 0 |
---|
3096 | #define nfs_dir_fdatasync 0 |
---|
3097 | #define nfs_link_fdatasync 0 |
---|
3098 | #endif |
---|
3099 | |
---|
3100 | /* unused */ |
---|
3101 | #ifdef DECLARE_BODY |
---|
3102 | static int nfs_file_fcntl( |
---|
3103 | int cmd, |
---|
3104 | rtems_libio_t *iop |
---|
3105 | )DECLARE_BODY |
---|
3106 | #else |
---|
3107 | #define nfs_file_fcntl 0 |
---|
3108 | #define nfs_dir_fcntl 0 |
---|
3109 | #define nfs_link_fcntl 0 |
---|
3110 | #endif |
---|
3111 | |
---|
3112 | /* files and symlinks are removed |
---|
3113 | * by the common nfs_unlink() routine. |
---|
3114 | * NFS has a different NFSPROC_RMDIR |
---|
3115 | * call, though... |
---|
3116 | */ |
---|
3117 | static int nfs_dir_rmnod( |
---|
3118 | rtems_filesystem_location_info_t *parentpathloc, /* IN */ |
---|
3119 | rtems_filesystem_location_info_t *pathloc /* IN */ |
---|
3120 | ) |
---|
3121 | { |
---|
3122 | return nfs_do_unlink(parentpathloc, pathloc, NFSPROC_RMDIR); |
---|
3123 | } |
---|
3124 | |
---|
3125 | /* the file handlers table */ |
---|
3126 | static |
---|
3127 | struct _rtems_filesystem_file_handlers_r nfs_file_file_handlers = { |
---|
3128 | nfs_file_open, /* OPTIONAL; may be NULL */ |
---|
3129 | nfs_file_close, /* OPTIONAL; may be NULL */ |
---|
3130 | nfs_file_read, /* OPTIONAL; may be NULL */ |
---|
3131 | nfs_file_write, /* OPTIONAL; may be NULL */ |
---|
3132 | nfs_file_ioctl, /* OPTIONAL; may be NULL */ |
---|
3133 | nfs_file_lseek, /* OPTIONAL; may be NULL */ |
---|
3134 | nfs_fstat, /* OPTIONAL; may be NULL */ |
---|
3135 | nfs_fchmod, /* OPTIONAL; may be NULL */ |
---|
3136 | nfs_file_ftruncate, /* OPTIONAL; may be NULL */ |
---|
3137 | nfs_file_fpathconf, /* OPTIONAL; may be NULL - UNUSED */ |
---|
3138 | nfs_file_fsync, /* OPTIONAL; may be NULL */ |
---|
3139 | nfs_file_fdatasync, /* OPTIONAL; may be NULL */ |
---|
3140 | nfs_file_fcntl, /* OPTIONAL; may be NULL */ |
---|
3141 | nfs_unlink, /* OPTIONAL; may be NULL */ |
---|
3142 | }; |
---|
3143 | |
---|
3144 | /* the directory handlers table */ |
---|
3145 | static |
---|
3146 | struct _rtems_filesystem_file_handlers_r nfs_dir_file_handlers = { |
---|
3147 | nfs_dir_open, /* OPTIONAL; may be NULL */ |
---|
3148 | nfs_dir_close, /* OPTIONAL; may be NULL */ |
---|
3149 | nfs_dir_read, /* OPTIONAL; may be NULL */ |
---|
3150 | nfs_dir_write, /* OPTIONAL; may be NULL */ |
---|
3151 | nfs_dir_ioctl, /* OPTIONAL; may be NULL */ |
---|
3152 | nfs_dir_lseek, /* OPTIONAL; may be NULL */ |
---|
3153 | nfs_fstat, /* OPTIONAL; may be NULL */ |
---|
3154 | nfs_fchmod, /* OPTIONAL; may be NULL */ |
---|
3155 | nfs_dir_ftruncate, /* OPTIONAL; may be NULL */ |
---|
3156 | nfs_dir_fpathconf, /* OPTIONAL; may be NULL - UNUSED */ |
---|
3157 | nfs_dir_fsync, /* OPTIONAL; may be NULL */ |
---|
3158 | nfs_dir_fdatasync, /* OPTIONAL; may be NULL */ |
---|
3159 | nfs_dir_fcntl, /* OPTIONAL; may be NULL */ |
---|
3160 | nfs_dir_rmnod, /* OPTIONAL; may be NULL */ |
---|
3161 | }; |
---|
3162 | |
---|
3163 | /* the link handlers table */ |
---|
3164 | static |
---|
3165 | struct _rtems_filesystem_file_handlers_r nfs_link_file_handlers = { |
---|
3166 | nfs_link_open, /* OPTIONAL; may be NULL */ |
---|
3167 | nfs_link_close, /* OPTIONAL; may be NULL */ |
---|
3168 | nfs_link_read, /* OPTIONAL; may be NULL */ |
---|
3169 | nfs_link_write, /* OPTIONAL; may be NULL */ |
---|
3170 | nfs_link_ioctl, /* OPTIONAL; may be NULL */ |
---|
3171 | nfs_link_lseek, /* OPTIONAL; may be NULL */ |
---|
3172 | nfs_fstat, /* OPTIONAL; may be NULL */ |
---|
3173 | nfs_fchmod, /* OPTIONAL; may be NULL */ |
---|
3174 | nfs_link_ftruncate, /* OPTIONAL; may be NULL */ |
---|
3175 | nfs_link_fpathconf, /* OPTIONAL; may be NULL - UNUSED */ |
---|
3176 | nfs_link_fsync, /* OPTIONAL; may be NULL */ |
---|
3177 | nfs_link_fdatasync, /* OPTIONAL; may be NULL */ |
---|
3178 | nfs_link_fcntl, /* OPTIONAL; may be NULL */ |
---|
3179 | nfs_unlink, /* OPTIONAL; may be NULL */ |
---|
3180 | }; |
---|
3181 | |
---|
3182 | /* we need a dummy driver entry table to get a |
---|
3183 | * major number from the system |
---|
3184 | */ |
---|
3185 | static |
---|
3186 | rtems_device_driver nfs_initialize( |
---|
3187 | rtems_device_major_number major, |
---|
3188 | rtems_device_minor_number minor, |
---|
3189 | void *arg |
---|
3190 | ) |
---|
3191 | { |
---|
3192 | /* we don't really use this routine because |
---|
3193 | * we cannot supply an argument (contrary |
---|
3194 | * to what the 'arg' parameter suggests - it |
---|
3195 | * is always set to 0 by the generics :-() |
---|
3196 | * and because we don't want the user to |
---|
3197 | * have to deal with the major number (which |
---|
3198 | * OTOH is something WE are interested in. The |
---|
3199 | * only reason for using this API was getting |
---|
3200 | * a major number, after all). |
---|
3201 | * |
---|
3202 | * Something must be present, however, to |
---|
3203 | * reserve a slot in the driver table. |
---|
3204 | */ |
---|
3205 | return RTEMS_SUCCESSFUL; |
---|
3206 | } |
---|
3207 | |
---|
3208 | static rtems_driver_address_table drvNfs = { |
---|
3209 | nfs_initialize, |
---|
3210 | 0, /* open */ |
---|
3211 | 0, /* close */ |
---|
3212 | 0, /* read */ |
---|
3213 | 0, /* write */ |
---|
3214 | 0 /* control */ |
---|
3215 | }; |
---|
3216 | |
---|
3217 | /* Dump a list of the currently mounted NFS to a file */ |
---|
3218 | int |
---|
3219 | nfsMountsShow(FILE *f) |
---|
3220 | { |
---|
3221 | char *mntpt = 0; |
---|
3222 | Nfs nfs; |
---|
3223 | |
---|
3224 | if (!f) |
---|
3225 | f = stdout; |
---|
3226 | |
---|
3227 | if ( !(mntpt=malloc(MAXPATHLEN)) ) { |
---|
3228 | fprintf(stderr,"nfsMountsShow(): no memory\n"); |
---|
3229 | return -1; |
---|
3230 | } |
---|
3231 | |
---|
3232 | fprintf(f,"Currently Mounted NFS:\n"); |
---|
3233 | |
---|
3234 | LOCK(nfsGlob.llock); |
---|
3235 | |
---|
3236 | for (nfs = nfsGlob.mounted_fs; nfs; nfs=nfs->next) { |
---|
3237 | fprintf(f,"%s on ", nfs->mt_entry->dev); |
---|
3238 | if (rtems_filesystem_resolve_location(mntpt, MAXPATHLEN, &nfs->mt_entry->mt_fs_root)) |
---|
3239 | fprintf(f,"<UNABLE TO LOOKUP MOUNTPOINT>\n"); |
---|
3240 | else |
---|
3241 | fprintf(f,"%s\n",mntpt); |
---|
3242 | } |
---|
3243 | |
---|
3244 | UNLOCK(nfsGlob.llock); |
---|
3245 | |
---|
3246 | free(mntpt); |
---|
3247 | return 0; |
---|
3248 | } |
---|
3249 | |
---|
3250 | #if 0 |
---|
3251 | CCJ_REMOVE_MOUNT |
---|
3252 | /* convenience wrapper |
---|
3253 | * |
---|
3254 | * NOTE: this routine calls NON-REENTRANT |
---|
3255 | * gethostbyname() if the host is |
---|
3256 | * not in 'dot' notation. |
---|
3257 | */ |
---|
3258 | int |
---|
3259 | nfsMount(char *uidhost, char *path, char *mntpoint) |
---|
3260 | { |
---|
3261 | struct stat st; |
---|
3262 | int devl; |
---|
3263 | char *host; |
---|
3264 | int rval = -1; |
---|
3265 | char *dev = 0; |
---|
3266 | |
---|
3267 | if (!uidhost || !path || !mntpoint) { |
---|
3268 | fprintf(stderr,"usage: nfsMount(""[uid.gid@]host"",""path"",""mountpoint"")\n"); |
---|
3269 | nfsMountsShow(stderr); |
---|
3270 | return -1; |
---|
3271 | } |
---|
3272 | |
---|
3273 | if ( !(dev = malloc((devl=strlen(uidhost) + 20 + strlen(path)+1))) ) { |
---|
3274 | fprintf(stderr,"nfsMount: out of memory\n"); |
---|
3275 | return -1; |
---|
3276 | } |
---|
3277 | |
---|
3278 | /* Try to create the mount point if nonexistent */ |
---|
3279 | if (stat(mntpoint, &st)) { |
---|
3280 | if (ENOENT != errno) { |
---|
3281 | perror("nfsMount trying to create mount point - stat failed"); |
---|
3282 | goto cleanup; |
---|
3283 | } else if (mkdir(mntpoint,0777)) { |
---|
3284 | perror("nfsMount trying to create mount point"); |
---|
3285 | goto cleanup; |
---|
3286 | } |
---|
3287 | } |
---|
3288 | |
---|
3289 | if ( !(host=strchr(uidhost,UIDSEP)) ) { |
---|
3290 | host = uidhost; |
---|
3291 | } else { |
---|
3292 | host++; |
---|
3293 | } |
---|
3294 | |
---|
3295 | if (isdigit((unsigned char)*host)) { |
---|
3296 | /* avoid using gethostbyname */ |
---|
3297 | sprintf(dev,"%s:%s",uidhost,path); |
---|
3298 | } else { |
---|
3299 | struct hostent *h; |
---|
3300 | |
---|
3301 | /* copy the uid part (hostname will be |
---|
3302 | * overwritten) |
---|
3303 | */ |
---|
3304 | strcpy(dev, uidhost); |
---|
3305 | |
---|
3306 | /* NOTE NOTE NOTE: gethostbyname is NOT |
---|
3307 | * thread safe. This is UGLY |
---|
3308 | */ |
---|
3309 | |
---|
3310 | /* BEGIN OF NON-THREAD SAFE REGION */ |
---|
3311 | |
---|
3312 | h = gethostbyname(host); |
---|
3313 | |
---|
3314 | if ( !h || |
---|
3315 | !inet_ntop( AF_INET, |
---|
3316 | (struct in_addr*)h->h_addr_list[0], |
---|
3317 | dev + (host - uidhost), |
---|
3318 | devl - (host - uidhost) ) |
---|
3319 | ) { |
---|
3320 | fprintf(stderr,"nfsMount: host '%s' not found\n",host); |
---|
3321 | goto cleanup; |
---|
3322 | } |
---|
3323 | |
---|
3324 | /* END OF NON-THREAD SAFE REGION */ |
---|
3325 | |
---|
3326 | /* append ':<path>' */ |
---|
3327 | strcat(dev,":"); |
---|
3328 | strcat(dev,path); |
---|
3329 | } |
---|
3330 | |
---|
3331 | printf("Trying to mount %s on %s\n",dev,mntpoint); |
---|
3332 | |
---|
3333 | if (mount(dev, |
---|
3334 | mntpoint, |
---|
3335 | "nfs", |
---|
3336 | RTEMS_FILESYSTEM_READ_WRITE, |
---|
3337 | NULL)) { |
---|
3338 | perror("nfsMount - mount"); |
---|
3339 | goto cleanup; |
---|
3340 | } |
---|
3341 | |
---|
3342 | rval = 0; |
---|
3343 | |
---|
3344 | cleanup: |
---|
3345 | free(dev); |
---|
3346 | return rval; |
---|
3347 | } |
---|
3348 | #endif |
---|
3349 | |
---|
3350 | /* HERE COMES A REALLY UGLY HACK */ |
---|
3351 | |
---|
3352 | /* This is stupid; it is _very_ hard to find the path |
---|
3353 | * leading to a rtems_filesystem_location_info_t node :-( |
---|
3354 | * The only easy way is making the location the current |
---|
3355 | * directory and issue a getcwd(). |
---|
3356 | * However, since we don't want to tamper with the |
---|
3357 | * current directory, we must create a separate |
---|
3358 | * task to do the job for us - sigh. |
---|
3359 | */ |
---|
3360 | |
---|
3361 | typedef struct ResolvePathArgRec_ { |
---|
3362 | rtems_filesystem_location_info_t *loc; /* IN: location to resolve */ |
---|
3363 | char *buf; /* IN/OUT: buffer where to put the path */ |
---|
3364 | int len; /* IN: buffer length */ |
---|
3365 | rtems_id sync; /* IN: synchronization */ |
---|
3366 | rtems_status_code status; /* OUT: result */ |
---|
3367 | } ResolvePathArgRec, *ResolvePathArg; |
---|
3368 | |
---|
3369 | static void |
---|
3370 | resolve_path(rtems_task_argument arg) |
---|
3371 | { |
---|
3372 | ResolvePathArg rpa = (ResolvePathArg)arg; |
---|
3373 | rtems_filesystem_location_info_t old; |
---|
3374 | |
---|
3375 | /* IMPORTANT: let the helper task have its own libio environment (i.e. cwd) */ |
---|
3376 | if (RTEMS_SUCCESSFUL == (rpa->status = rtems_libio_set_private_env())) { |
---|
3377 | |
---|
3378 | old = rtems_filesystem_current; |
---|
3379 | |
---|
3380 | rtems_filesystem_current = *(rpa->loc); |
---|
3381 | |
---|
3382 | if ( !getcwd(rpa->buf, rpa->len) ) |
---|
3383 | rpa->status = RTEMS_UNSATISFIED; |
---|
3384 | |
---|
3385 | /* must restore the cwd because 'freenode' will be called on it */ |
---|
3386 | rtems_filesystem_current = old; |
---|
3387 | } |
---|
3388 | rtems_semaphore_release(rpa->sync); |
---|
3389 | rtems_task_delete(RTEMS_SELF); |
---|
3390 | } |
---|
3391 | |
---|
3392 | |
---|
3393 | /* a utility routine to find the path leading to a |
---|
3394 | * rtems_filesystem_location_info_t node |
---|
3395 | * |
---|
3396 | * INPUT: 'loc' and a buffer 'buf' (length 'len') to hold the |
---|
3397 | * path. |
---|
3398 | * OUTPUT: path copied into 'buf' |
---|
3399 | * |
---|
3400 | * RETURNS: 0 on success, RTEMS error code on error. |
---|
3401 | */ |
---|
3402 | rtems_status_code |
---|
3403 | rtems_filesystem_resolve_location(char *buf, int len, rtems_filesystem_location_info_t *loc) |
---|
3404 | { |
---|
3405 | ResolvePathArgRec arg; |
---|
3406 | rtems_id tid = 0; |
---|
3407 | rtems_task_priority pri; |
---|
3408 | rtems_status_code status; |
---|
3409 | |
---|
3410 | arg.loc = loc; |
---|
3411 | arg.buf = buf; |
---|
3412 | arg.len = len; |
---|
3413 | arg.sync = 0; |
---|
3414 | |
---|
3415 | status = rtems_semaphore_create( |
---|
3416 | rtems_build_name('r','e','s','s'), |
---|
3417 | 0, |
---|
3418 | RTEMS_SIMPLE_BINARY_SEMAPHORE, |
---|
3419 | 0, |
---|
3420 | &arg.sync); |
---|
3421 | |
---|
3422 | if (RTEMS_SUCCESSFUL != status) |
---|
3423 | goto cleanup; |
---|
3424 | |
---|
3425 | rtems_task_set_priority(RTEMS_SELF, RTEMS_CURRENT_PRIORITY, &pri); |
---|
3426 | |
---|
3427 | status = rtems_task_create( |
---|
3428 | rtems_build_name('r','e','s','s'), |
---|
3429 | pri, |
---|
3430 | RTEMS_MINIMUM_STACK_SIZE + 50000, |
---|
3431 | RTEMS_DEFAULT_MODES, |
---|
3432 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
3433 | &tid); |
---|
3434 | |
---|
3435 | if (RTEMS_SUCCESSFUL != status) |
---|
3436 | goto cleanup; |
---|
3437 | |
---|
3438 | status = rtems_task_start(tid, resolve_path, (rtems_task_argument)&arg); |
---|
3439 | |
---|
3440 | if (RTEMS_SUCCESSFUL != status) { |
---|
3441 | rtems_task_delete(tid); |
---|
3442 | goto cleanup; |
---|
3443 | } |
---|
3444 | |
---|
3445 | |
---|
3446 | /* synchronize with the helper task */ |
---|
3447 | rtems_semaphore_obtain(arg.sync, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
3448 | |
---|
3449 | status = arg.status; |
---|
3450 | |
---|
3451 | cleanup: |
---|
3452 | if (arg.sync) |
---|
3453 | rtems_semaphore_delete(arg.sync); |
---|
3454 | |
---|
3455 | return status; |
---|
3456 | } |
---|
3457 | |
---|
3458 | int |
---|
3459 | nfsSetTimeout(uint32_t timeout_ms) |
---|
3460 | { |
---|
3461 | rtems_interrupt_level k; |
---|
3462 | uint32_t s,us; |
---|
3463 | |
---|
3464 | if ( timeout_ms > 100000 ) { |
---|
3465 | /* out of range */ |
---|
3466 | return -1; |
---|
3467 | } |
---|
3468 | |
---|
3469 | s = timeout_ms/1000; |
---|
3470 | us = (timeout_ms % 1000) * 1000; |
---|
3471 | |
---|
3472 | rtems_interrupt_disable(k); |
---|
3473 | _nfscalltimeout.tv_sec = s; |
---|
3474 | _nfscalltimeout.tv_usec = us; |
---|
3475 | rtems_interrupt_enable(k); |
---|
3476 | |
---|
3477 | return 0; |
---|
3478 | } |
---|
3479 | |
---|
3480 | uint32_t |
---|
3481 | nfsGetTimeout( void ) |
---|
3482 | { |
---|
3483 | rtems_interrupt_level k; |
---|
3484 | uint32_t s,us; |
---|
3485 | rtems_interrupt_disable(k); |
---|
3486 | s = _nfscalltimeout.tv_sec; |
---|
3487 | us = _nfscalltimeout.tv_usec; |
---|
3488 | rtems_interrupt_enable(k); |
---|
3489 | return s*1000 + us/1000; |
---|
3490 | } |
---|