diff options
Diffstat (limited to 'fs/ext2/dev.c')
| -rw-r--r-- | fs/ext2/dev.c | 131 | 
1 files changed, 0 insertions, 131 deletions
| diff --git a/fs/ext2/dev.c b/fs/ext2/dev.c deleted file mode 100644 index 874e21161..000000000 --- a/fs/ext2/dev.c +++ /dev/null @@ -1,131 +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> -#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) -{ -	ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, SECTOR_SIZE); -	unsigned sectors; - -	/* -	 *  Check partition boundaries -	 */ -	if ((sector < 0) || -	    ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= -		part_info.size)) { -		/* errnum = ERR_OUTSIDE_PART; */ -		printf(" ** %s read outside partition sector %d\n", -		       __func__, -		       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(" ** %s Invalid Block Device Descriptor (NULL)\n", -		       __func__); -		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(" ** %s read error **\n", __func__); -			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 */ -	sectors = byte_len / SECTOR_SIZE; - -	if (sectors > 0) { -		if (ext2fs_block_dev_desc->block_read( -			ext2fs_block_dev_desc->dev, -			part_info.start + sector, -			sectors, -			(unsigned long *) buf) != sectors) { -			printf(" ** %s read error - block\n", __func__); -			return 0; -		} - -		buf += sectors * SECTOR_SIZE; -		byte_len -= sectors * SECTOR_SIZE; -		sector += sectors; -	} - -	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(" ** %s read error - last part\n", __func__); -			return 0; -		} -		memcpy(buf, sec_buf, byte_len); -	} -	return 1; -} |