From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 3 Jan 2006 08:55:13 +0000 (+0100)
Subject: NFSv4: Make nfs4_state track O_RDWR, O_RDONLY and O_WRONLY separately
X-Git-Tag: v2.6.16-rc1~935^2~4^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e761692381f294ea079d2e869fcd7c0afc79e394;p=pandora-kernel.git

NFSv4: Make nfs4_state track O_RDWR, O_RDONLY and O_WRONLY separately

 A closer reading of RFC3530 reveals that OPEN_DOWNGRADE must always
 specify a access modes that have been the argument of a previous OPEN
 operation.
 IOW: doing OPEN(O_RDWR) and then OPEN_DOWNGRADE(O_WRONLY) is forbidden
 unless the user called OPEN(O_WRONLY)

 In order to fix that, we really need to track the three possible open
 states separately.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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