Commit 41f04d85 authored by Eric Sandeen's avatar Eric Sandeen Committed by Linus Torvalds
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[PATCH] ext2: fix mounts at 16T 



Signed-off-by: default avatarEric Sandeen <esandeen@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 855565e8

fs/ext2/super.c

+19 −13
Original line number Diff line number Diff line
@@ -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);