nfs41: exchange_id operation
Implement the exchange_id operation conforming to
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26
Unlike NFSv4.0, NFSv4.1 requires machine credentials. RPC_AUTH_GSS machine
credentials will be passed into the kernel at mount time to be available for
the exchange_id operation.
RPC_AUTH_UNIX root mounts can use the UNIX root credential. Store the root
credential in the nfs_client struct.
Without a credential, NFSv4.1 state renewal fails.
[nfs41: establish clientid via exchange id only if cred != NULL]
Signed-off-by: Andy Adamson<andros@umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: move nfstime4 from under CONFIG_NFS_V4_1]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: do not wait a lease time in exchange id]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: pass *session in seq_args and seq_res]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[nfs41: Ignoring impid in decode_exchange_id is missing a READ_BUF]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: fix Xcode_exchange_id's xdr Xcoding pointer type]
[nfs41: get rid of unused struct nfs41_exchange_id_res members]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 5b944cd..783c421 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -246,6 +246,27 @@
(0)
#if defined(CONFIG_NFS_V4_1)
+#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
+ encode_verifier_maxsz + \
+ 1 /* co_ownerid.len */ + \
+ XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
+ 1 /* flags */ + \
+ 1 /* spa_how */ + \
+ 0 /* SP4_NONE (for now) */ + \
+ 1 /* zero implemetation id array */)
+#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
+ 2 /* eir_clientid */ + \
+ 1 /* eir_sequenceid */ + \
+ 1 /* eir_flags */ + \
+ 1 /* spr_how */ + \
+ 0 /* SP4_NONE (for now) */ + \
+ 2 /* eir_server_owner.so_minor_id */ + \
+ /* eir_server_owner.so_major_id<> */ \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
+ /* eir_server_scope<> */ \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
+ 1 /* eir_server_impl_id array length */ + \
+ 0 /* ignored eir_server_impl_id contents */)
#define encode_sequence_maxsz 0 /* stub */
#define decode_sequence_maxsz 0 /* stub */
#else /* CONFIG_NFS_V4_1 */
@@ -594,6 +615,14 @@
decode_putfh_maxsz + \
decode_lookup_maxsz + \
decode_fs_locations_maxsz)
+#if defined(CONFIG_NFS_V4_1)
+#define NFS4_enc_exchange_id_sz \
+ (compound_encode_hdr_maxsz + \
+ encode_exchange_id_maxsz)
+#define NFS4_dec_exchange_id_sz \
+ (compound_decode_hdr_maxsz + \
+ decode_exchange_id_maxsz)
+#endif /* CONFIG_NFS_V4_1 */
static const umode_t nfs_type2fmt[] = {
[NF4BAD] = 0,
@@ -1455,7 +1484,29 @@
hdr->replen += decode_delegreturn_maxsz;
}
+#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
+static void encode_exchange_id(struct xdr_stream *xdr,
+ struct nfs41_exchange_id_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ RESERVE_SPACE(4 + sizeof(args->verifier->data));
+ WRITE32(OP_EXCHANGE_ID);
+ WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
+
+ encode_string(xdr, args->id_len, args->id);
+
+ RESERVE_SPACE(12);
+ WRITE32(args->flags);
+ WRITE32(0); /* zero length state_protect4_a */
+ WRITE32(0); /* zero length implementation id array */
+ hdr->nops++;
+ hdr->replen += decode_exchange_id_maxsz;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
static void encode_sequence(struct xdr_stream *xdr,
const struct nfs4_sequence_args *args,
struct compound_hdr *hdr)
@@ -2162,6 +2213,26 @@
return 0;
}
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * EXCHANGE_ID request
+ */
+static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
+ struct nfs41_exchange_id_args *args)
+{
+ struct xdr_stream xdr;
+ struct compound_hdr hdr = {
+ .minorversion = args->client->cl_minorversion,
+ };
+
+ xdr_init_encode(&xdr, &req->rq_snd_buf, p);
+ encode_compound_hdr(&xdr, req, &hdr);
+ encode_exchange_id(&xdr, args, &hdr);
+ encode_nops(&hdr);
+ return 0;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
/*
* START OF "GENERIC" DECODE ROUTINES.
* These may look a little ugly since they are imported from a "generic"
@@ -3877,6 +3948,52 @@
return decode_op_hdr(xdr, OP_DELEGRETURN);
}
+#if defined(CONFIG_NFS_V4_1)
+static int decode_exchange_id(struct xdr_stream *xdr,
+ struct nfs41_exchange_id_res *res)
+{
+ __be32 *p;
+ uint32_t dummy;
+ int status;
+ struct nfs_client *clp = res->client;
+
+ status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
+ if (status)
+ return status;
+
+ READ_BUF(8);
+ READ64(clp->cl_ex_clid);
+ READ_BUF(12);
+ READ32(clp->cl_seqid);
+ READ32(clp->cl_exchange_flags);
+
+ /* We ask for SP4_NONE */
+ READ32(dummy);
+ if (dummy != SP4_NONE)
+ return -EIO;
+
+ /* Throw away minor_id */
+ READ_BUF(8);
+
+ /* Throw away Major id */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+
+ /* Throw away server_scope */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+
+ /* Throw away Implementation id array */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+
+ return 0;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
static int decode_sequence(struct xdr_stream *xdr,
struct nfs4_sequence_res *res,
struct rpc_rqst *rqstp)
@@ -4774,6 +4891,25 @@
return status;
}
+#if defined(CONFIG_NFS_V4_1)
+/*
+ * EXCHANGE_ID request
+ */
+static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
+ void *res)
+{
+ struct xdr_stream xdr;
+ struct compound_hdr hdr;
+ int status;
+
+ xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
+ status = decode_compound_hdr(&xdr, &hdr);
+ if (!status)
+ status = decode_exchange_id(&xdr, res);
+ return status;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
{
uint32_t bitmap[2] = {0};
@@ -4943,6 +5079,9 @@
PROC(GETACL, enc_getacl, dec_getacl),
PROC(SETACL, enc_setacl, dec_setacl),
PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
+#if defined(CONFIG_NFS_V4_1)
+ PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
+#endif /* CONFIG_NFS_V4_1 */
};
struct rpc_version nfs_version4 = {