NFS: Added TEST_STATEID call
This patch adds in the xdr for doing a TEST_STATEID call with a single
stateid. RFC 5661 allows multiple stateids to be tested in a single
call, but only testing one keeps things simpler for now.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c8c069a..7d914d9 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -345,6 +345,9 @@
1 + decode_stateid_maxsz)
#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
+#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \
+ XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1)
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -782,6 +785,12 @@
decode_sequence_maxsz + \
decode_putrootfh_maxsz + \
decode_secinfo_no_name_maxsz)
+#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_test_stateid_maxsz)
+#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_test_stateid_maxsz)
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1962,6 +1971,20 @@
hdr->replen += decode_secinfo_no_name_maxsz;
return 0;
}
+
+static void encode_test_stateid(struct xdr_stream *xdr,
+ struct nfs41_test_stateid_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE);
+ *p++ = cpu_to_be32(OP_TEST_STATEID);
+ *p++ = cpu_to_be32(1);
+ xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
+ hdr->nops++;
+ hdr->replen += decode_test_stateid_maxsz;
+}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -2833,6 +2856,23 @@
encode_nops(&hdr);
return 0;
}
+
+/*
+ * Encode TEST_STATEID request
+ */
+static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_test_stateid_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_test_stateid(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
#endif /* CONFIG_NFS_V4_1 */
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
@@ -5371,6 +5411,35 @@
print_overflow_msg(__func__, xdr);
return -EIO;
}
+
+static int decode_test_stateid(struct xdr_stream *xdr,
+ struct nfs41_test_stateid_res *res)
+{
+ __be32 *p;
+ int status;
+ int num_res;
+
+ status = decode_op_hdr(xdr, OP_TEST_STATEID);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ num_res = be32_to_cpup(p++);
+ if (num_res != 1)
+ goto out;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->status = be32_to_cpup(p++);
+ return res->status;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+out:
+ return -EIO;
+}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -6534,6 +6603,27 @@
out:
return status;
}
+
+/*
+ * Decode TEST_STATEID response
+ */
+static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs41_test_stateid_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_test_stateid(xdr, res);
+out:
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
/**
@@ -6737,6 +6827,7 @@
PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
+ PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid),
#endif /* CONFIG_NFS_V4_1 */
};