fs/super.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <malloc.h>
   4 #include <err.h>
   5 #include <fs.h>
   6 #include <tfs.h>
   7 #include <cache.h>
   8
   9 struct fs * current_root_fs;
  10
  11 struct fs_type fs_types [] = {
  12         {tfs_mount, tfs_get_blk_shift},
  13         {NULL, NULL}
  14 };
  15
  16 struct fs *fs_init(void)
  17 {
  18         struct fs *fs = malloc(sizeof(*fs));
  19         struct fs_type *fs_type;
  20
  21         printk("fs system initialiaztion...");
  22
  23         fs_type = fs_types;
  24         while (fs_type->mount) {
  25                 fs->sb = fs_type->mount();
  26                 if (fs->sb)
  27                         break;
  28                 fs_type++;
  29         }
  30         if (!fs_type->mount)
  31                 return NULL;
  32         fs->block_shift = fs_type->get_blk_shift(fs->sb);
  33         fs->sector_shift = 9;
  34         current_root_fs = fs;
  35
  36         cache_init(fs);
  37
  38         fs->root = tfs_iget_root(fs);
  39         fs->pwd = fs->root;
  40
  41         strcpy(fs->cwd, "/");
  42
  43         /*
  44          * ZERO the fd table, since we currently do not support process, we just have
  45          * one set of fd table. So, init it here.
  46          */
  47         memset(fds, 0, 32);
  48
  49         printk("\t\t%s\n", "[OK]");
  50         return fs;
  51 }
  52