On Jan 30, 2008 11:19 -0600, Eric Sandeen wrote: > This seems to work fine; any comments, either about > the logic, or the text descriptions, or the various > options I've shown/not shown? > > To test, copy your "magic" file somewhere local, > replace the ext2/3 section with the following, > and do something like: > > # file -C -m magic; file -m ./magic -s /dev/sda1 > > -Eric > > # ext2/ext3 filesystems - Andreas Dilger <adilger@xxxxxxxxxxxxx> Lol, you may as well fix up the email.... adilger@xxxxxxxxx will probably be the least transient. > 0x438 leshort 0xEF53 Linux > >0x44c lelong x rev %d > >0x43e leshort x \b.%d > # No journal? ext2 > >0x45c lelong ^0x0000004 ext2 filesystem data > >>0x43a leshort ^0x0000001 (mounted or unclean) > # Has a journal? ext3 or ext4 > >0x45c lelong &0x0000004 > # and small INCOMPAT? > >>0x460 lelong <0x0000040 > # and small RO_COMPAT? > >>>0x464 lelong <0x0000008 ext3 filesystem data > # else large RO_COMPAT? > >>>0x464 lelong >0x0000007 ext4 filesystem data > # else large INCOMPAT? > >>0x460 lelong >0x000003f ext4 filesystem data > # General flags for any ext* fs > >0x460 lelong &0x0000004 (needs journal recovery) > >0x43a leshort &0x0000002 (errors) > # INCOMPAT flags > >0x460 lelong &0x0000001 (compressed) > #>0x460 lelong &0x0000002 (filetype) > #>0x460 lelong &0x0000010 (meta bg) > >0x460 lelong &0x0000040 (extents) > >0x460 lelong &0x0000080 (64bit) > #>0x460 lelong &0x0000100 (mmp) > #>0x460 lelong &0x0000200 (flex bg) > # RO_INCOMPAT flags > #>0x464 lelong &0x0000001 (sparse super) > >0x464 lelong &0x0000002 (large files) > >0x464 lelong &0x0000008 (huge files) > #>0x464 lelong &0x0000010 (gdt checksum) > #>0x464 lelong &0x0000020 (many subdirs) > #>0x463 lelong &0x0000040 (extra isize) Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
