information on block size in ext2

[Anandanam Rama Kotaiah <kotaiah iitg ernet in>]

hi all
 I want to know wt does s_log_blocksize represent in ext2's superblock
structure in memory.. Is is 1024 for 1kb block size in ext2 file system..
Also wt does s_blocksize and s_blocksize_bits members of VFS
superblock represent..

BTW are there any ext2 file system specific mailing lists..

bye
a Linux lover