From: Andy Adamson <andros@citi.umich.edu>
Date: Sun, 26 Mar 2006 09:37:26 +0000 (-0800)
Subject: [PATCH] VFS,fs/locks.c,NFSD4: add race_free posix_lock_file_conf() interface
X-Git-Tag: v2.6.17-rc1~631
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5842add2f3b519111b6401f3a35862bd00a3aa7e;p=pandora-kernel.git

[PATCH] VFS,fs/locks.c,NFSD4: add race_free posix_lock_file_conf() interface

Lockd and the NFSv4 server both exercise a race condition where
posix_test_lock() is called either before or after posix_lock_file() to
deal with a denied lock request due to a conflicting lock.

Remove the race condition for the NFSv4 server by adding a new conflicting
lock parameter to __posix_lock_file() , changing the name to
__posix_lock_file_conf().

Keep posix_lock_file() interface, add posix_lock_conf() interface, both
call __posix_lock_file_conf().

[akpm@osdl.org: Put the EXPORT_SYMBOL() where it belongs]
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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