From: Kris Kennaway <kris@freebsd.org>
To: linux-kernel@vger.kernel.org
Subject: NFS Locking violates protocol spec (incompatible with FreeBSD)
Date: Thu, 6 Nov 2003 20:10:51 -0800 [thread overview]
Message-ID: <20031107041051.GA4065@rot13.obsecurity.org> (raw)
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Hello,
In http://lxr.linux.no/source/include/linux/lockd/xdr.h?v=2.6.0-test7
can be found the following comment:
35 /*
36 * NLM cookies. Technically they can be 1K, Nobody uses over 8 bytes
37 * however.
38 */
39
40 struct nlm_cookie
41 {
42 unsigned char data[8];
43 unsigned int len;
44 };
Unfortunately, this is incorrect: FreeBSD 5.x's rpc.lockd uses a 16
byte cookie, and therefore FreeBSD 5.x NFS clients cannot interoperate
with Linux when NFS locking is enabled.
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/56461
contains more details about this problem, including a workaround for
FreeBSD to limit the cookie size to 8 bytes. Obviously, it would be
better for this bug to be fixed in Linux, since Linux is
non-conformant to the protocol.
Kris
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next reply other threads:[~2003-11-07 4:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-07 4:10 Kris Kennaway [this message]
2003-11-07 4:46 ` NFS Locking violates protocol spec (incompatible with FreeBSD) Trond Myklebust
2003-11-07 4:53 ` Kris Kennaway
2003-11-07 6:13 ` Trond Myklebust
2003-11-07 6:32 ` Kris Kennaway
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