nfs41: RECLAIM_COMPLETE XDR functionality
XDR encoding and decoding for RECLAIM_COMPLETE. Implements the necessary
encoding to indicate reclaim complete for the entire client. In the future,
it can be extended to provide reclaim complete functionality for a single
file system after migration.
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index bc8711d..e437fd6 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -301,6 +301,8 @@
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
#define decode_sequence_maxsz (op_decode_hdr_maxsz + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
+#define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4)
+#define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4)
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -678,6 +680,12 @@
decode_sequence_maxsz + \
decode_putrootfh_maxsz + \
decode_fsinfo_maxsz)
+#define NFS4_enc_reclaim_complete_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_reclaim_complete_maxsz)
+#define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_reclaim_complete_maxsz)
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1623,6 +1631,19 @@
hdr->nops++;
hdr->replen += decode_destroy_session_maxsz;
}
+
+static void encode_reclaim_complete(struct xdr_stream *xdr,
+ struct nfs41_reclaim_complete_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 8);
+ *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
+ *p++ = cpu_to_be32(args->one_fs);
+ hdr->nops++;
+ hdr->replen += decode_reclaim_complete_maxsz;
+}
#endif /* CONFIG_NFS_V4_1 */
static void encode_sequence(struct xdr_stream *xdr,
@@ -2451,6 +2472,26 @@
encode_nops(&hdr);
return 0;
}
+
+/*
+ * a RECLAIM_COMPLETE request
+ */
+static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
+ struct nfs41_reclaim_complete_args *args)
+{
+ struct xdr_stream xdr;
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args)
+ };
+
+ xdr_init_encode(&xdr, &req->rq_snd_buf, p);
+ encode_compound_hdr(&xdr, req, &hdr);
+ encode_sequence(&xdr, &args->seq_args, &hdr);
+ encode_reclaim_complete(&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)
@@ -4559,6 +4600,11 @@
{
return decode_op_hdr(xdr, OP_DESTROY_SESSION);
}
+
+static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
+{
+ return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
+}
#endif /* CONFIG_NFS_V4_1 */
static int decode_sequence(struct xdr_stream *xdr,
@@ -5622,6 +5668,25 @@
status = decode_fsinfo(&xdr, res->lr_fsinfo);
return status;
}
+
+/*
+ * Decode RECLAIM_COMPLETE response
+ */
+static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
+ struct nfs41_reclaim_complete_res *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_sequence(&xdr, &res->seq_res, rqstp);
+ if (!status)
+ status = decode_reclaim_complete(&xdr, (void *)NULL);
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
@@ -5798,6 +5863,7 @@
PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session),
PROC(SEQUENCE, enc_sequence, dec_sequence),
PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time),
+ PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
#endif /* CONFIG_NFS_V4_1 */
};