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libext2fs: fix i_blocks for extent leaf create/delete with bigalloc

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When libext2fs allocates/deletes an extent leaf, the i_blocks
value is incremented/decremented by fs->blocksize / 512. This
is incorrect in case of bigalloc. The correct way here is to
use cluster_size / 512.

The problem is seen if we try to create a large inode using
libext2fs (say using ext2fs_block_iterate3()) on a bigalloc
filesystem. fsck catches this and complains.

Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Aditya Kali 2012-06-10 23:52:11 -04:00 committed by Theodore Ts'o
parent 63b3913dbc
commit e0e2c7db4d
1 changed files with 5 additions and 2 deletions
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7
lib/ext2fs/extent.c
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@ -1027,7 +1027,8 @@ static errcode_t extent_node_split(ext2_extent_handle_t handle)
goto done;
/* new node hooked in, so update inode block count (do this here?) */
handle->inode->i_blocks += handle->fs->blocksize / 512;
handle->inode->i_blocks += (handle->fs->blocksize *
EXT2FS_CLUSTER_RATIO(handle->fs)) / 512;
retval = ext2fs_write_inode(handle->fs, handle->ino,
handle->inode);
if (retval)
@ -1501,7 +1502,9 @@ errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags)
return retval;
retval = ext2fs_extent_delete(handle, flags);
handle->inode->i_blocks -= handle->fs->blocksize / 512;
handle->inode->i_blocks -=
(handle->fs->blocksize *
EXT2FS_CLUSTER_RATIO(handle->fs)) / 512;
retval = ext2fs_write_inode(handle->fs, handle->ino,
handle->inode);
ext2fs_block_alloc_stats2(handle->fs,