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authorBenny Halevy <bhalevy@panasas.com>2009-04-01 09:23:22 -0400
committerBenny Halevy <bhalevy@panasas.com>2009-06-17 14:11:37 -0700
commit34bc47c941a074f91c2455b4b08503d02c74b878 (patch)
tree0e565b6a999080686e7e5c3536cb9f4ac86f1e9a /fs/nfs/callback_xdr.c
parent45377b94edea18f53dd3ba4d46d94de4bb7c00b5 (diff)
downloadlinux-34bc47c941a074f91c2455b4b08503d02c74b878.tar.bz2
nfs41: consider minorversion in callback_xdr:process_op
Note that this patch changes the nfsv4.0 behavior also when CONFIG_NFS_V4_1 is not defined where NFS4ERR_MINOR_VERS_MISMATCH will be returned if the client received a CB_COMPOUND with minorversion != 0. Previously, it would have returned NFS4ERR_OP_ILLEGAL for CB_SEQUENCE. (or if the server is broken and sent OP_CB_GETATTR or OP_CB_RECALL with minorversion!=0, they would have been processed normally. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: refactor op preprocessing out of process_op] See http://linux-nfs.org/pipermail/pnfs/2009-June/007845.html [nfs41: define CB_NOTIFY_DEVICEID as not supported] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'fs/nfs/callback_xdr.c')
-rw-r--r--fs/nfs/callback_xdr.c85
1 files changed, 71 insertions, 14 deletions
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index f6cc79b1d1f3..41c5be1c1be5 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -356,31 +356,87 @@ out:
return status;
}
-static __be32 process_op(struct svc_rqst *rqstp,
+#if defined(CONFIG_NFS_V4_1)
+
+static __be32
+preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
+{
+ switch (op_nr) {
+ case OP_CB_GETATTR:
+ case OP_CB_RECALL:
+ *op = &callback_ops[op_nr];
+ break;
+
+ case OP_CB_LAYOUTRECALL:
+ case OP_CB_NOTIFY_DEVICEID:
+ case OP_CB_NOTIFY:
+ case OP_CB_PUSH_DELEG:
+ case OP_CB_RECALL_ANY:
+ case OP_CB_RECALLABLE_OBJ_AVAIL:
+ case OP_CB_RECALL_SLOT:
+ case OP_CB_SEQUENCE:
+ case OP_CB_WANTS_CANCELLED:
+ case OP_CB_NOTIFY_LOCK:
+ return htonl(NFS4ERR_NOTSUPP);
+
+ default:
+ return htonl(NFS4ERR_OP_ILLEGAL);
+ }
+
+ return htonl(NFS_OK);
+}
+
+#else /* CONFIG_NFS_V4_1 */
+
+static __be32
+preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
+{
+ return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
+}
+
+#endif /* CONFIG_NFS_V4_1 */
+
+static __be32
+preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
+{
+ switch (op_nr) {
+ case OP_CB_GETATTR:
+ case OP_CB_RECALL:
+ *op = &callback_ops[op_nr];
+ break;
+ default:
+ return htonl(NFS4ERR_OP_ILLEGAL);
+ }
+
+ return htonl(NFS_OK);
+}
+
+static __be32 process_op(uint32_t minorversion, int nop,
+ struct svc_rqst *rqstp,
struct xdr_stream *xdr_in, void *argp,
struct xdr_stream *xdr_out, void *resp)
{
struct callback_op *op = &callback_ops[0];
unsigned int op_nr = OP_CB_ILLEGAL;
- __be32 status = 0;
+ __be32 status;
long maxlen;
__be32 res;
dprintk("%s: start\n", __func__);
status = decode_op_hdr(xdr_in, &op_nr);
- if (likely(status == 0)) {
- switch (op_nr) {
- case OP_CB_GETATTR:
- case OP_CB_RECALL:
- op = &callback_ops[op_nr];
- break;
- default:
- op_nr = OP_CB_ILLEGAL;
- op = &callback_ops[0];
- status = htonl(NFS4ERR_OP_ILLEGAL);
- }
+ if (unlikely(status)) {
+ status = htonl(NFS4ERR_OP_ILLEGAL);
+ goto out;
}
+ dprintk("%s: minorversion=%d nop=%d op_nr=%u\n",
+ __func__, minorversion, nop, op_nr);
+
+ status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) :
+ preprocess_nfs4_op(op_nr, &op);
+ if (status == htonl(NFS4ERR_OP_ILLEGAL))
+ op_nr = OP_CB_ILLEGAL;
+out:
maxlen = xdr_out->end - xdr_out->p;
if (maxlen > 0 && maxlen < PAGE_SIZE) {
if (likely(status == 0 && op->decode_args != NULL))
@@ -428,7 +484,8 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
return rpc_system_err;
while (status == 0 && nops != hdr_arg.nops) {
- status = process_op(rqstp, &xdr_in, argp, &xdr_out, resp);
+ status = process_op(hdr_arg.minorversion, nops,
+ rqstp, &xdr_in, argp, &xdr_out, resp);
nops++;
}