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NFS4: on a O_EXCL OPEN make sure SETATTR sets the fields holding the verifier

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The Linux NFS4 client simply skips over the bitmask in an O_EXCL open
call and so it doesn't bother to reset any fields that may be holding
the verifier. This patch has us save the first two words of the bitmask
(which is all the current client has #defines for). The client then
later checks this bitmask and turns on the appropriate flags in the
sattr->ia_verify field for the following SETATTR call.

This patch only currently checks to see if the server used the atime
and mtime slots for the verifier (which is what the Linux server uses
for this). I'm not sure of what other fields the server could
reasonably use, but adding checks for others should be trivial.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Jeff Layton
2007-06-05 14:49:03 -04:00
committed by Trond Myklebust
parent fc6ae3cf48
commit aa53ed541a
4 changed files with 29 additions and 2 deletions
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1
include/linux/nfs4.h
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@@ -15,6 +15,7 @@
#include <linux/types.h>
#define NFS4_BITMAP_SIZE 2
#define NFS4_VERIFIER_SIZE 8
#define NFS4_STATEID_SIZE 16
#define NFS4_FHSIZE 128