qemu/roms/openbios/fs/ext2/ext2_mount.c

   1 /*
   2  *
   3  * (c) 2008-2009 Laurent Vivier <Laurent@lvivier.info>
   4  *
   5  * This file has been copied from EMILE, http://emile.sf.net
   6  *
   7  */
   8
   9 #include "libext2.h"
  10 #include "ext2.h"
  11 #include "ext2_utils.h"
  12
  13 #define SB_OFFSET (2)
  14
  15 ext2_VOLUME* ext2_mount(int fd)
  16 {
  17         ext2_VOLUME *volume;
  18         struct ext2_super_block *super;
  19         char *buffer;
  20
  21         super = (struct ext2_super_block*)malloc(sizeof(struct ext2_super_block));
  22         if (super == NULL)
  23                 return NULL;
  24
  25         ext2_get_super(fd, super);
  26         if (super->s_magic != EXT2_SUPER_MAGIC) {
  27                 free(super);
  28                 return NULL;
  29         }
  30
  31         buffer = (char*)malloc(EXT2_BLOCK_SIZE(super));
  32         if (buffer == NULL) {
  33                 free(super);
  34                 return NULL;
  35         }
  36
  37         volume = (ext2_VOLUME*)malloc(sizeof(ext2_VOLUME));
  38         if (volume == NULL) {
  39                 free(super);
  40                 free(buffer);
  41                 return NULL;
  42         }
  43
  44         volume->buffer = buffer;
  45         volume->fd = fd;
  46         volume->super = super;
  47
  48         volume->current = -1;
  49         ext2_read_block(volume, 0);
  50
  51         return volume;
  52 }
  53
  54 int ext2_umount(ext2_VOLUME* volume)
  55 {
  56         if (volume == NULL)
  57                 return -1;
  58         free(volume->super);
  59         free(volume->buffer);
  60         free(volume);
  61         return 0;
  62 }