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nfsd4: clean up validate_stateid 

The logic here is better expressed with a switch statement.

While we're here, CLOSED stateids (or stateids of an unkown type--which
would indicate a server bug) should probably return nfserr_bad_stateid,
though this behavior shouldn't affect any non-buggy client.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2013-04-09 17:42:28 -04:00
parent 06b332a522
commit 23340032e6
1 changed files with 14 additions and 5 deletions
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19
fs/nfsd/nfs4state.c
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@ -3456,13 +3456,22 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
status = check_stateid_generation(stateid, &s->sc_stateid, 1);
if (status)
return status;
if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID)))
switch (s->sc_type) {
case NFS4_DELEG_STID:
return nfs_ok;
ols = openlockstateid(s);
if (ols->st_stateowner->so_is_open_owner
&& !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
case NFS4_OPEN_STID:
case NFS4_LOCK_STID:
ols = openlockstateid(s);
if (ols->st_stateowner->so_is_open_owner
&& !(openowner(ols->st_stateowner)->oo_flags
& NFS4_OO_CONFIRMED))
return nfserr_bad_stateid;
return nfs_ok;
default:
printk("unknown stateid type %x\n", s->sc_type);
case NFS4_CLOSED_STID:
return nfserr_bad_stateid;
return nfs_ok;
}
}
static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,