arlad/subr.c

   1 /*
   2  * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "arla_local.h"
  35 RCSID("$Id$");
  36
  37 /*
  38  * come up with a good inode number for `name', `fid' in `parent'
  39  */
  40
  41 ino_t
  42 dentry2ino (const char *name, const VenusFid *fid, const FCacheEntry *parent)
  43 {
  44     if (strcmp (name, ".") == 0
  45         && (parent->flags.vol_root
  46             || (fid->fid.Vnode == 1 && fid->fid.Unique == 1))
  47         && parent->volume != NULL) {
  48
  49         long voltype = getvoltype(fid->fid.Volume, parent->volume);
  50         return afsfid2inode (&parent->volume->parent[voltype].mp_fid);
  51
  52     } else if (strcmp (name, "..") == 0
  53                && (parent->flags.vol_root
  54                    || (parent->fid.fid.Vnode == 1
  55                        && parent->fid.fid.Unique == 1))
  56                && parent->volume != NULL) {
  57
  58         long voltype = getvoltype(fid->fid.Volume, parent->volume);
  59         return afsfid2inode (&parent->volume->parent[voltype].fid);
  60
  61     } else if (strcmp (name, "..") == 0
  62                && fid->fid.Vnode == 1 && fid->fid.Unique == 1
  63                && parent->volume != NULL) {
  64
  65         long voltype = getvoltype(fid->fid.Volume, parent->volume);
  66         return afsfid2inode (&parent->volume->parent[voltype].mp_fid);
  67
  68     } else {
  69         return afsfid2inode (fid);
  70     }
  71 }
  72
  73 /*
  74  * Assume `e' has valid data.
  75  */
  76
  77 int
  78 conv_dir_sub (FCacheEntry *e, CredCacheEntry *ce, u_int tokens,
  79               fcache_cache_handle *cache_handle,
  80               char *cache_name, size_t cache_name_sz,
  81               fdir_readdir_func func,
  82               void (*flush_func)(void *),
  83               size_t blocksize)
  84 {
  85      struct write_dirent_args args;
  86      int ret;
  87      int fd;
  88      fbuf the_fbuf;
  89
  90      e->flags.extradirp = TRUE;
  91      fcache_extra_file_name (e, cache_name, cache_name_sz);
  92      e->tokens |= NNPFS_DATA_R | NNPFS_OPEN_NR;
  93
  94      args.fd = open (cache_name, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
  95      if (args.fd == -1) {
  96           ret = errno;
  97           arla_warn (ADEBWARN, ret, "open %s", cache_name);
  98           return ret;
  99      }
 100      ret = fcache_fhget (cache_name, cache_handle);
 101
 102      args.off  = 0;
 103      args.buf  = (char *)malloc (blocksize);
 104      if (args.buf == NULL) {
 105          ret = errno;
 106          arla_warn (ADEBWARN, ret, "malloc %u", (unsigned)blocksize);
 107          close (args.fd);
 108          return ret;
 109      }
 110      memset(args.buf, 0, blocksize);
 111
 112      ret = fcache_get_fbuf (e, &fd, &the_fbuf,
 113                             O_RDONLY, FBUF_READ|FBUF_PRIVATE);
 114      if (ret) {
 115          close (args.fd);
 116          free (args.buf);
 117          return ret;
 118      }
 119
 120      args.ptr  = args.buf;
 121      args.last = NULL;
 122      args.e    = e;
 123      args.ce   = ce;
 124
 125      /* translate to local dir format, write in args.fd */
 126      fdir_readdir (&the_fbuf, func, (void *)&args, e->fid, NULL);
 127
 128      fbuf_end (&the_fbuf);
 129      close (fd);
 130
 131      if (args.last)
 132           (*flush_func) (&args);
 133      free (args.buf);
 134      ret = close (args.fd);
 135      if (ret)
 136           ret = errno;
 137      return ret;
 138 }