NFS: Add SECINFO_NO_NAME procedure
If the client is using NFS v4.1, then we can use SECINFO_NO_NAME to find
the secflavor for the initial mount. If the server doesn't support
SECINFO_NO_NAME then I fall back on the "guess and check" method used
for v4.0 mounts.
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 1555c74..c8c069a 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -343,6 +343,8 @@
1 /* FIXME: opaque lrf_body always empty at the moment */)
#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \
1 + decode_stateid_maxsz)
+#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1)
+#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -772,6 +774,14 @@
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutreturn_maxsz)
+#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putrootfh_maxsz +\
+ encode_secinfo_no_name_maxsz)
+#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putrootfh_maxsz + \
+ decode_secinfo_no_name_maxsz)
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1938,6 +1948,20 @@
hdr->nops++;
hdr->replen += decode_layoutreturn_maxsz;
}
+
+static int
+encode_secinfo_no_name(struct xdr_stream *xdr,
+ const struct nfs41_secinfo_no_name_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(OP_SECINFO_NO_NAME);
+ *p++ = cpu_to_be32(args->style);
+ hdr->nops++;
+ hdr->replen += decode_secinfo_no_name_maxsz;
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -2790,6 +2814,25 @@
encode_layoutreturn(xdr, args, &hdr);
encode_nops(&hdr);
}
+
+/*
+ * Encode SECINFO_NO_NAME request
+ */
+static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs41_secinfo_no_name_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_putrootfh(xdr, &hdr);
+ encode_secinfo_no_name(xdr, args, &hdr);
+ encode_nops(&hdr);
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
@@ -6467,6 +6510,30 @@
out:
return status;
}
+
+/*
+ * Decode SECINFO_NO_NAME response
+ */
+static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_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_putrootfh(xdr);
+ if (status)
+ goto out;
+ status = decode_secinfo(xdr, res);
+out:
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
/**
@@ -6669,6 +6736,7 @@
PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn),
+ PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name),
#endif /* CONFIG_NFS_V4_1 */
};