From 64c54025842f205ad722675105b88044a5b6845a Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Tue, 26 Dec 2006 01:25:48 +0000 Subject: remove e2fsprogs. Nobody volunteered to clean up that mess --- e2fsprogs/ext2fs/rw_bitmaps.c | 296 ------------------------------------------ 1 file changed, 296 deletions(-) delete mode 100644 e2fsprogs/ext2fs/rw_bitmaps.c (limited to 'e2fsprogs/ext2fs/rw_bitmaps.c') diff --git a/e2fsprogs/ext2fs/rw_bitmaps.c b/e2fsprogs/ext2fs/rw_bitmaps.c deleted file mode 100644 index a5782db95..000000000 --- a/e2fsprogs/ext2fs/rw_bitmaps.c +++ /dev/null @@ -1,296 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * rw_bitmaps.c --- routines to read and write the inode and block bitmaps. - * - * Copyright (C) 1993, 1994, 1994, 1996 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include -#include -#if HAVE_UNISTD_H -#include -#endif -#include -#include -#ifdef HAVE_SYS_STAT_H -#include -#endif -#ifdef HAVE_SYS_TYPES_H -#include -#endif - -#include "ext2_fs.h" -#include "ext2fs.h" -#include "e2image.h" - -#if defined(__powerpc__) && BB_BIG_ENDIAN -/* - * On the PowerPC, the big-endian variant of the ext2 filesystem - * has its bitmaps stored as 32-bit words with bit 0 as the LSB - * of each word. Thus a bitmap with only bit 0 set would be, as - * a string of bytes, 00 00 00 01 00 ... - * To cope with this, we byte-reverse each word of a bitmap if - * we have a big-endian filesystem, that is, if we are *not* - * byte-swapping other word-sized numbers. - */ -#define EXT2_BIG_ENDIAN_BITMAPS -#endif - -#ifdef EXT2_BIG_ENDIAN_BITMAPS -static void ext2fs_swap_bitmap(ext2_filsys fs, char *bitmap, int nbytes) -{ - __u32 *p = (__u32 *) bitmap; - int n; - - for (n = nbytes / sizeof(__u32); n > 0; --n, ++p) - *p = ext2fs_swab32(*p); -} -#endif - -errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs) -{ - dgrp_t i; - size_t nbytes; - errcode_t retval; - char * inode_bitmap = fs->inode_map->bitmap; - char * bitmap_block = NULL; - blk_t blk; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - if (!(fs->flags & EXT2_FLAG_RW)) - return EXT2_ET_RO_FILSYS; - if (!inode_bitmap) - return 0; - nbytes = (size_t) ((EXT2_INODES_PER_GROUP(fs->super)+7) / 8); - - retval = ext2fs_get_mem(fs->blocksize, &bitmap_block); - if (retval) - return retval; - memset(bitmap_block, 0xff, fs->blocksize); - for (i = 0; i < fs->group_desc_count; i++) { - memcpy(bitmap_block, inode_bitmap, nbytes); - blk = fs->group_desc[i].bg_inode_bitmap; - if (blk) { -#ifdef EXT2_BIG_ENDIAN_BITMAPS - if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE))) - ext2fs_swap_bitmap(fs, bitmap_block, nbytes); -#endif - retval = io_channel_write_blk(fs->io, blk, 1, - bitmap_block); - if (retval) - return EXT2_ET_INODE_BITMAP_WRITE; - } - inode_bitmap += nbytes; - } - fs->flags &= ~EXT2_FLAG_IB_DIRTY; - ext2fs_free_mem(&bitmap_block); - return 0; -} - -errcode_t ext2fs_write_block_bitmap (ext2_filsys fs) -{ - dgrp_t i; - unsigned int j; - int nbytes; - unsigned int nbits; - errcode_t retval; - char * block_bitmap = fs->block_map->bitmap; - char * bitmap_block = NULL; - blk_t blk; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - if (!(fs->flags & EXT2_FLAG_RW)) - return EXT2_ET_RO_FILSYS; - if (!block_bitmap) - return 0; - nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8; - retval = ext2fs_get_mem(fs->blocksize, &bitmap_block); - if (retval) - return retval; - memset(bitmap_block, 0xff, fs->blocksize); - for (i = 0; i < fs->group_desc_count; i++) { - memcpy(bitmap_block, block_bitmap, nbytes); - if (i == fs->group_desc_count - 1) { - /* Force bitmap padding for the last group */ - nbits = ((fs->super->s_blocks_count - - fs->super->s_first_data_block) - % EXT2_BLOCKS_PER_GROUP(fs->super)); - if (nbits) - for (j = nbits; j < fs->blocksize * 8; j++) - ext2fs_set_bit(j, bitmap_block); - } - blk = fs->group_desc[i].bg_block_bitmap; - if (blk) { -#ifdef EXT2_BIG_ENDIAN_BITMAPS - if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE))) - ext2fs_swap_bitmap(fs, bitmap_block, nbytes); -#endif - retval = io_channel_write_blk(fs->io, blk, 1, - bitmap_block); - if (retval) - return EXT2_ET_BLOCK_BITMAP_WRITE; - } - block_bitmap += nbytes; - } - fs->flags &= ~EXT2_FLAG_BB_DIRTY; - ext2fs_free_mem(&bitmap_block); - return 0; -} - -static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block) -{ - dgrp_t i; - char *block_bitmap = 0, *inode_bitmap = 0; - char *buf; - errcode_t retval; - int block_nbytes = (int) EXT2_BLOCKS_PER_GROUP(fs->super) / 8; - int inode_nbytes = (int) EXT2_INODES_PER_GROUP(fs->super) / 8; - blk_t blk; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - fs->write_bitmaps = ext2fs_write_bitmaps; - - retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf); - if (retval) - return retval; - if (do_block) { - ext2fs_free_block_bitmap(fs->block_map); - sprintf(buf, "block bitmap for %s", fs->device_name); - retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map); - if (retval) - goto cleanup; - block_bitmap = fs->block_map->bitmap; - } - if (do_inode) { - ext2fs_free_inode_bitmap(fs->inode_map); - sprintf(buf, "inode bitmap for %s", fs->device_name); - retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map); - if (retval) - goto cleanup; - inode_bitmap = fs->inode_map->bitmap; - } - ext2fs_free_mem(&buf); - - if (fs->flags & EXT2_FLAG_IMAGE_FILE) { - if (inode_bitmap) { - blk = (fs->image_header->offset_inodemap / - fs->blocksize); - retval = io_channel_read_blk(fs->image_io, blk, - -(inode_nbytes * fs->group_desc_count), - inode_bitmap); - if (retval) - goto cleanup; - } - if (block_bitmap) { - blk = (fs->image_header->offset_blockmap / - fs->blocksize); - retval = io_channel_read_blk(fs->image_io, blk, - -(block_nbytes * fs->group_desc_count), - block_bitmap); - if (retval) - goto cleanup; - } - return 0; - } - - for (i = 0; i < fs->group_desc_count; i++) { - if (block_bitmap) { - blk = fs->group_desc[i].bg_block_bitmap; - if (blk) { - retval = io_channel_read_blk(fs->io, blk, - -block_nbytes, block_bitmap); - if (retval) { - retval = EXT2_ET_BLOCK_BITMAP_READ; - goto cleanup; - } -#ifdef EXT2_BIG_ENDIAN_BITMAPS - if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))) - ext2fs_swap_bitmap(fs, block_bitmap, block_nbytes); -#endif - } else - memset(block_bitmap, 0, block_nbytes); - block_bitmap += block_nbytes; - } - if (inode_bitmap) { - blk = fs->group_desc[i].bg_inode_bitmap; - if (blk) { - retval = io_channel_read_blk(fs->io, blk, - -inode_nbytes, inode_bitmap); - if (retval) { - retval = EXT2_ET_INODE_BITMAP_READ; - goto cleanup; - } -#ifdef EXT2_BIG_ENDIAN_BITMAPS - if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))) - ext2fs_swap_bitmap(fs, inode_bitmap, inode_nbytes); -#endif - } else - memset(inode_bitmap, 0, inode_nbytes); - inode_bitmap += inode_nbytes; - } - } - return 0; - -cleanup: - if (do_block) { - ext2fs_free_mem(&fs->block_map); - } - if (do_inode) { - ext2fs_free_mem(&fs->inode_map); - } - ext2fs_free_mem(&buf); - return retval; -} - -errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs) -{ - return read_bitmaps(fs, 1, 0); -} - -errcode_t ext2fs_read_block_bitmap(ext2_filsys fs) -{ - return read_bitmaps(fs, 0, 1); -} - -errcode_t ext2fs_read_bitmaps(ext2_filsys fs) -{ - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - if (fs->inode_map && fs->block_map) - return 0; - - return read_bitmaps(fs, !fs->inode_map, !fs->block_map); -} - -errcode_t ext2fs_write_bitmaps(ext2_filsys fs) -{ - errcode_t retval; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - if (fs->block_map && ext2fs_test_bb_dirty(fs)) { - retval = ext2fs_write_block_bitmap(fs); - if (retval) - return retval; - } - if (fs->inode_map && ext2fs_test_ib_dirty(fs)) { - retval = ext2fs_write_inode_bitmap(fs); - if (retval) - return retval; - } - return 0; -} - -- cgit v1.2.3