linux-ext4 - "- 8" in EXT2_MAX_BLOCKS_PER

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 10 Oct 2011 10:50:43 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: "- 8" in EXT2_MAX_BLOCKS_PER_GROUP

When looking at the maximal filesystem size issue, I found myself
wondering what the "- 8" is in here, it's not commented
or documented anywhere:

#define EXT2_MAX_BLOCKS_PER_GROUP(s)    (((1 << 16) - 8) *      \
                                          (EXT2_CLUSTER_SIZE(s) / \
                                           EXT2_BLOCK_SIZE(s)))


(pre-bigalloc, it was just ((1 << 16) - 8) )

Anyone know?

-Eric

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html