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Fixed 2 bugs:

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- Superblock was being looked for in the wrong place for blocksizes larger
   than 1K.
 - Fixed arithmetic on blocks to correctly determine block number to get
   next without overflowing 32-bit arithmetic on moderately large hard disks.
This commit is contained in:
erich 1998-08-20 21:09:46 +00:00
parent 4080247fe9
commit acd07871bc
1 changed files with 5 additions and 3 deletions
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8
shared_src/fsys_ext2fs.c
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@ -252,7 +252,7 @@ ext2_rdfsb (int fsblock, int buffer) {
#ifdef E2DEBUG
printf("fsblock %d buffer %d\n", fsblock, buffer);
#endif /* E2DEBUG */
return devread(fsblock * EXT2_BLOCK_SIZE(SUPERBLOCK) / DEV_BSIZE, 0,
return devread(fsblock * (EXT2_BLOCK_SIZE(SUPERBLOCK) / DEV_BSIZE), 0,
EXT2_BLOCK_SIZE(SUPERBLOCK), (int)buffer);
}
@ -388,7 +388,7 @@ ext2fs_read(int addr, int len)
debug_fs_func = debug_fs;
#endif /* NO_FANCY_STUFF */
devread(map * EXT2_BLOCK_SIZE(SUPERBLOCK) / DEV_BSIZE,
devread(map * (EXT2_BLOCK_SIZE(SUPERBLOCK) / DEV_BSIZE),
offset, size, addr);
#ifndef NO_FANCY_STUFF
@ -483,7 +483,9 @@ ext2fs_dir(char *dirname)
EXT2_DESC_PER_BLOCK(SUPERBLOCK));
printf("group_id=%d group_desc=%d desc=%d\n", group_id, group_desc, desc);
#endif /* E2DEBUG */
if (!ext2_rdfsb((WHICH_SUPER + group_desc + 1), (int)GROUP_DESC)) {
if (!ext2_rdfsb(
(WHICH_SUPER + group_desc + SUPERBLOCK->s_first_data_block),
(int)GROUP_DESC)) {
return 0;
}
gdp = GROUP_DESC;