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[PATCH] ext2: fix mounts at 16T

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Signed-off-by: Eric Sandeen <esandeen@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric Sandeen 2006-09-27 01:49:30 -07:00 committed by Linus Torvalds
parent 855565e81a
commit 41f04d852e
1 changed files with 19 additions and 13 deletions
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32
fs/ext2/super.c
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@ -544,17 +544,24 @@ static int ext2_check_descriptors (struct super_block * sb)
int i;
int desc_block = 0;
struct ext2_sb_info *sbi = EXT2_SB(sb);
unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block);
unsigned long first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
unsigned long last_block;
struct ext2_group_desc * gdp = NULL;
ext2_debug ("Checking group descriptors");
for (i = 0; i < sbi->s_groups_count; i++)
{
if (i == sbi->s_groups_count - 1)
last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
else
last_block = first_block +
(EXT2_BLOCKS_PER_GROUP(sb) - 1);
if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
gdp = (struct ext2_group_desc *) sbi->s_group_desc[desc_block++]->b_data;
if (le32_to_cpu(gdp->bg_block_bitmap) < block ||
le32_to_cpu(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
le32_to_cpu(gdp->bg_block_bitmap) > last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Block bitmap for group %d"
@ -562,8 +569,8 @@ static int ext2_check_descriptors (struct super_block * sb)
i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap));
return 0;
}
if (le32_to_cpu(gdp->bg_inode_bitmap) < block ||
le32_to_cpu(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Inode bitmap for group %d"
@ -571,9 +578,9 @@ static int ext2_check_descriptors (struct super_block * sb)
i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap));
return 0;
}
if (le32_to_cpu(gdp->bg_inode_table) < block ||
le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >=
block + EXT2_BLOCKS_PER_GROUP(sb))
if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >
last_block)
{
ext2_error (sb, "ext2_check_descriptors",
"Inode table for group %d"
@ -581,7 +588,7 @@ static int ext2_check_descriptors (struct super_block * sb)
i, (unsigned long) le32_to_cpu(gdp->bg_inode_table));
return 0;
}
block += EXT2_BLOCKS_PER_GROUP(sb);
first_block += EXT2_BLOCKS_PER_GROUP(sb);
gdp++;
}
return 1;
@ -861,10 +868,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext2;
sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) -
le32_to_cpu(es->s_first_data_block) +
EXT2_BLOCKS_PER_GROUP(sb) - 1) /
EXT2_BLOCKS_PER_GROUP(sb);
sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
le32_to_cpu(es->s_first_data_block) - 1)
/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
EXT2_DESC_PER_BLOCK(sb);
sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);