linux-kernel - Re: 2.6.18-rc4-mm3 crypto issues with encrypted disks

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Date:	Mon, 04 Sep 2006 17:25:22 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...l.org>,
	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.18-rc4-mm3 crypto issues with encrypted disks

On Mon, 04 Sep 2006 12:02:28 EDT, Valdis.Kletnieks@...edu said:

> Sorry for not catching this one earlier..  Sometime between 2.6.18-rc4-mm2
> and -mm3, something crept into the git-cryptodev.patch that breaks mounting
> encrypted disks.  What I have in /etc/fstab:

And of course, after I spend time doing a -mm bisect, the problem evaporates
in -rc5-mm1. ;)

> /dev/rootvg/crypto1     /crypto/mount_dir    ext3    nodev,nosuid,noexec,noauto,noatime,nodiratime,user,loop,encryption=aes 1 0

> My personal guess as "most likely suspect" (only obvious hit on cryptoloop):

Looks like a self-inflicted screw-up in the .config.  The relevant diff
of the 2 .config files (the -rc4-mm3 had a 'patch -R < git-cryptodev' so
the new options aren't in that .config)

-# Linux kernel version: 2.6.18-rc4-mm3
-# Wed Aug 30 10:00:30 2006
+# Linux kernel version: 2.6.18-rc5-mm1
+# Mon Sep  4 16:22:37 2006
....
+CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_BLKCIPHER=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_MANAGER=y

Does 'CONFIG_CRYPTOLOOP' need a 'SELECT CRYPTO_MANAGER' (or one of the other
symbols)?

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