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nfsd: nfs4 minorversion decoder vectors

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Have separate vectors of operation decoders for each minorversion.
Obsolete ops in newer minorversions have default implementation returning
nfserr_opnotsupp.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Benny Halevy 2008-07-02 11:14:22 +03:00 committed by J. Bruce Fields
parent 3c375c6f3a
commit f2feb96bc3
1 changed files with 14 additions and 3 deletions
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17
fs/nfsd/nfs4xdr.c
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@ -1039,11 +1039,21 @@ static nfsd4_dec nfsd4_dec_ops[] = {
[OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_release_lockowner,
};
struct nfsd4_minorversion_ops {
nfsd4_dec *decoders;
int nops;
};
static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
[0] { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
};
static __be32
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
DECODE_HEAD;
struct nfsd4_op *op;
struct nfsd4_minorversion_ops *ops;
int i;
/*
@ -1073,9 +1083,10 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
}
}
if (argp->minorversion != 0)
if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
argp->opcnt = 0;
ops = &nfsd4_minorversion[argp->minorversion];
for (i = 0; i < argp->opcnt; i++) {
op = &argp->ops[i];
op->replay = NULL;
@ -1113,8 +1124,8 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
}
op->opnum = ntohl(*argp->p++);
if (op->opnum >= OP_ACCESS && op->opnum < ARRAY_SIZE(nfsd4_dec_ops))
op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
op->status = ops->decoders[op->opnum](argp, &op->u);
else {
op->opnum = OP_ILLEGAL;
op->status = nfserr_op_illegal;