arch/ppc-sam440/boot/parthenope/src/ext2.c

   1 /* ext2.c */
   2
   3 /* <project_name> -- <project_description>
   4  *
   5  * Copyright (C) 2006 - 2007
   6  *     Giuseppe Coviello <cjg@cruxppc.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include "context.h"
  24 #include "rdb.h"
  25 #include "ext2.h"
  26
  27 typedef struct {
  28         int (*load_file) (void *this, char *filename, void *buffer);
  29         void (*destroy) (void *this);
  30         int discno;
  31         int partno;
  32         unsigned part_length;
  33 } ext2_boot_dev_t;
  34
  35 static int load_file(ext2_boot_dev_t * this, char *filename, void *buffer)
  36 {
  37         int filelen;
  38
  39         if (!ext2fs_mount(this->part_length)) {
  40                 printf("** Bad ext2 partition or disk - %d:%d **\n",
  41                        this->discno, this->partno);
  42                 ext2fs_close();
  43                 return -4;
  44         }
  45
  46         filelen = ext2fs_open(filename);
  47         if (filelen < 0) {
  48                 printf("** File not found %s\n", filename);
  49                 ext2fs_close();
  50                 return -5;
  51         }
  52
  53         if (ext2fs_read((char *)buffer, filelen) != filelen) {
  54                 printf("\n** Unable to read \"%s\" from %d:%d **\n",
  55                        filename, this->discno, this->partno);
  56                 ext2fs_close();
  57                 return -6;
  58         }
  59
  60         ext2fs_close();
  61
  62         return filelen;
  63 }
  64
  65 static int destroy(ext2_boot_dev_t * this)
  66 {
  67         free(this);
  68         return 0;
  69 }
  70
  71 boot_dev_t *ext2_create(struct RdbPartition *partition)
  72 {
  73         ext2_boot_dev_t *boot;
  74         unsigned part_length;
  75
  76         if ((part_length = ext2fs_set_blk_dev_full(partition->dev_desc,
  77                                                    partition->info)) == 0) {
  78                 printf("** Bad partition - %d:%d **\n", partition->disk,
  79                        partition->partition);
  80                 ext2fs_close();
  81                 return NULL;
  82         }
  83
  84         if (!ext2fs_mount(part_length)) {
  85                 printf("** Bad ext2 partition or disk - %d:%d **\n",
  86                        partition->disk, partition->partition);
  87                 ext2fs_close();
  88                 return NULL;
  89         }
  90
  91         ext2fs_close();
  92
  93         boot = malloc(sizeof(ext2_boot_dev_t));
  94         boot->load_file = (int (*)(void *, char *, void *))load_file;
  95         boot->destroy = (void (*)(void *))destroy;
  96         boot->discno = partition->disk;
  97         boot->partno = partition->partition;
  98         boot->part_length = part_length;
  99
 100         return (boot_dev_t *) boot;
 101 }
 102