diff options
Diffstat (limited to 'fs/ext2/dev.c')
-rw-r--r-- | fs/ext2/dev.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/fs/ext2/dev.c b/fs/ext2/dev.c deleted file mode 100644 index 1469e982b7..0000000000 --- a/fs/ext2/dev.c +++ /dev/null @@ -1,126 +0,0 @@ -/* - * (C) Copyright 2004 - * esd gmbh <www.esd-electronics.com> - * Reinhard Arlt <reinhard.arlt@esd-electronics.com> - * - * based on code of fs/reiserfs/dev.c by - * - * (C) Copyright 2003 - 2004 - * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - - -#include <common.h> -#if (CONFIG_COMMANDS & CFG_CMD_EXT2) - -#include <config.h> -#include <ext2fs.h> - -static block_dev_desc_t *ext2fs_block_dev_desc; -static disk_partition_t part_info; - -int ext2fs_set_blk_dev (block_dev_desc_t * rbdd, int part) -{ - ext2fs_block_dev_desc = rbdd; - - if (part == 0) { - /* disk doesn't use partition table */ - part_info.start = 0; - part_info.size = rbdd->lba; - part_info.blksz = rbdd->blksz; - } else { - if (get_partition_info - (ext2fs_block_dev_desc, part, &part_info)) { - return 0; - } - } - return (part_info.size); -} - - -int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) { - char sec_buf[SECTOR_SIZE]; - unsigned block_len; - -/* - * Check partition boundaries - */ - if ((sector < 0) - || ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= - part_info.size)) { - /* errnum = ERR_OUTSIDE_PART; */ - printf (" ** ext2fs_devread() read outside partition sector %d\n", sector); - return (0); - } - -/* - * Get the read to the beginning of a partition. - */ - sector += byte_offset >> SECTOR_BITS; - byte_offset &= SECTOR_SIZE - 1; - - debug (" <%d, %d, %d>\n", sector, byte_offset, byte_len); - - if (ext2fs_block_dev_desc == NULL) { - printf ("** Invalid Block Device Descriptor (NULL)\n"); - return (0); - } - - if (byte_offset != 0) { - /* read first part which isn't aligned with start of sector */ - if (ext2fs_block_dev_desc-> - block_read (ext2fs_block_dev_desc->dev, - part_info.start + sector, 1, - (unsigned long *) sec_buf) != 1) { - printf (" ** ext2fs_devread() read error **\n"); - return (0); - } - memcpy (buf, sec_buf + byte_offset, - min (SECTOR_SIZE - byte_offset, byte_len)); - buf += min (SECTOR_SIZE - byte_offset, byte_len); - byte_len -= min (SECTOR_SIZE - byte_offset, byte_len); - sector++; - } - - /* read sector aligned part */ - block_len = byte_len & ~(SECTOR_SIZE - 1); - if (ext2fs_block_dev_desc->block_read (ext2fs_block_dev_desc->dev, - part_info.start + sector, - block_len / SECTOR_SIZE, - (unsigned long *) buf) != - block_len / SECTOR_SIZE) { - printf (" ** ext2fs_devread() read error - block\n"); - return (0); - } - buf += block_len; - byte_len -= block_len; - sector += block_len / SECTOR_SIZE; - - if (byte_len != 0) { - /* read rest of data which are not in whole sector */ - if (ext2fs_block_dev_desc-> - block_read (ext2fs_block_dev_desc->dev, - part_info.start + sector, 1, - (unsigned long *) sec_buf) != 1) { - printf (" ** ext2fs_devread() read error - last part\n"); - return (0); - } - memcpy (buf, sec_buf, byte_len); - } - return (1); -} -#endif /* CFG_CMD_EXT2FS */ |