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nfs41: verify CB_SEQUENCE position in callback compound 

CB_SEQUENCE must appear first in the callback compound RPC.
If it is not the first operation NFS4ERR_SEQUENCE_POS must be returned.
If the first operation ni the CB_COMPOUND is not CB_SEQUENCE then
NFS4ERR_OP_NOT_IN_SESSION must be returned.

Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: refactor op preprocessing out of process_op]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
hifive-unleashed-5.1
Benny Halevy 2009-04-01 09:23:27 -04:00
parent 4aece6a19c
commit 281fe15dc1
1 changed files with 8 additions and 0 deletions
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8
fs/nfs/callback_xdr.c
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@ -521,6 +521,14 @@ out:
static __be32
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
{
if (op_nr == OP_CB_SEQUENCE) {
if (nop != 0)
return htonl(NFS4ERR_SEQUENCE_POS);
} else {
if (nop == 0)
return htonl(NFS4ERR_OP_NOT_IN_SESSION);
}
switch (op_nr) {
case OP_CB_GETATTR:
case OP_CB_RECALL: