Messages in this thread Patch in this message | | | Date | Tue, 15 Aug 2006 12:28:22 -0500 | From | Eric Sandeen <> | Subject | [PATCH] fix ext2 mounts at 16T |
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Andrew Morton wrote:
>> (I'll send an ext2 patch doing the same thing if that's warranted) > please, when you have nothing better to do ;)
Ok, here's the ext2 version. note however that ext2 never got the ext3_fsblk_t treatment, so there are probably signed containers lurking in ext2 still. I'll leave that for another day when I have nothing better to do ;-) But at least this part is less divergent now.
Signed-off-by: Eric Sandeen <esandeen@redhat.com>
--- linux.orig/fs/ext2/super.c +++ linux/fs/ext2/super.c @@ -505,17 +505,24 @@ static int ext2_check_descriptors (struc 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 = 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" @@ -523,8 +530,8 @@ static int ext2_check_descriptors (struc 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" @@ -532,9 +539,9 @@ static int ext2_check_descriptors (struc 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" @@ -542,7 +549,7 @@ static int ext2_check_descriptors (struc 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; @@ -822,10 +829,9 @@ static int ext2_fill_super(struct super_ 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);
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