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NFS: change stateid to be a union

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In NFSv4.1 the stateid consists of the other and seqid fields. For layout
processing we need to numerically compare the seqid value of layout stateids.
To do so, introduce a union to nfs4_stateid to switch between opaque(16 bytes)
and opaque(12 bytes) / __be32

Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Alexandros Batsakis
2010-10-20 00:17:56 -04:00
committed by Trond Myklebust
parent c772567d97
commit 9449925273
2 changed files with 17 additions and 6 deletions
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8
fs/nfs/callback_proc.c
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@ -118,11 +118,11 @@ int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const n
if (delegation == NULL)
return 0;
/* seqid is 4-bytes long */
if (((u32 *) &stateid->data)[0] != 0)
if (stateid->stateid.seqid != 0)
return 0;
if (memcmp(&delegation->stateid.data[4], &stateid->data[4],
sizeof(stateid->data)-4))
if (memcmp(&delegation->stateid.stateid.other,
&stateid->stateid.other,
NFS4_STATEID_OTHER_SIZE))
return 0;
return 1;