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References: <1296578246.12605.22.camel@moss-pluto> <1296578542-5902-1-git-send-email-lucian.grijincu@gmail.com>
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From: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
Date: Tue, 1 Feb 2011 21:46:42 +0200
Message-ID: <AANLkTik+N5J-MDrbMbtwRPwz==J4y8sbBkhir=1K3g=B@mail.gmail.com>
Subject: Re: [PATCH 1/2] security/selinux: fix /proc/sys/ labeling
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>, James Morris <jmorris@namei.org>,
        Eric Paris <eparis@parisplace.org>, linux-kernel@vger.kernel.org,
        linux-security-module@vger.kernel.org
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On Tue, Feb 1, 2011 at 9:33 PM, Eric W. Biederman <ebiederm@xmission.com> wrote:
> What kernel has a dentry_path_raw?  Perhaps you mean __dentry_path?


See the function here:
https://github.com/mirrors/linux-2.6/blob/70d1f365568e0cdbc9f4ab92428e1830fdb09ab0/fs/dcache.c

The last patches were against 2.6.38-rc2 because the dcache layer got
rewritten in 2.6.38 http://lwn.net/Articles/421784/

__dentry_path is now static (in fs/dcache.c) and does not take the
necessary locks.

dentry_path_raw is __dentry_path with locks

    ec2447c278ee973d35f38e53ca16ba7f965ae33d
    hostfs: simplify locking

    Remove dcache_lock locking from hostfs filesystem, and move it into dcache
    helpers. All that is required is a coherent path name. Protection from
    concurrent modification of the namespace after path name generation is not
    provided in current code, because dcache_lock is dropped before the path is
    used.

    Signed-off-by: Nick Piggin <npiggin@kernel.dk>



-- 
 .
..: Lucian