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-rw-r--r--include/rxrpc/message.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/include/rxrpc/message.h b/include/rxrpc/message.h
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+/* message.h: Rx message caching
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_RXRPC_MESSAGE_H
+#define _LINUX_RXRPC_MESSAGE_H
+
+#include <rxrpc/packet.h>
+
+/*****************************************************************************/
+/*
+ * Rx message record
+ */
+struct rxrpc_message
+{
+ atomic_t usage;
+ struct list_head link; /* list link */
+ struct timeval stamp; /* time received or last sent */
+ rxrpc_seq_t seq; /* message sequence number */
+
+ int state; /* the state the message is currently in */
+#define RXRPC_MSG_PREPARED 0
+#define RXRPC_MSG_SENT 1
+#define RXRPC_MSG_ACKED 2 /* provisionally ACK'd */
+#define RXRPC_MSG_DONE 3 /* definitively ACK'd (msg->seq<ack.firstPacket) */
+#define RXRPC_MSG_RECEIVED 4
+#define RXRPC_MSG_ERROR -1
+ char rttdone; /* used for RTT */
+
+ struct rxrpc_transport *trans; /* transport received through */
+ struct rxrpc_connection *conn; /* connection received over */
+ struct sk_buff *pkt; /* received packet */
+ off_t offset; /* offset into pkt of next byte of data */
+
+ struct rxrpc_header hdr; /* message header */
+
+ int dcount; /* data part count */
+ size_t dsize; /* data size */
+#define RXRPC_MSG_MAX_IOCS 8
+ struct kvec data[RXRPC_MSG_MAX_IOCS]; /* message data */
+ unsigned long dfree; /* bit mask indicating kfree(data[x]) if T */
+};
+
+#define rxrpc_get_message(M) do { atomic_inc(&(M)->usage); } while(0)
+
+extern void __rxrpc_put_message(struct rxrpc_message *msg);
+static inline void rxrpc_put_message(struct rxrpc_message *msg)
+{
+ BUG_ON(atomic_read(&msg->usage)<=0);
+ if (atomic_dec_and_test(&msg->usage))
+ __rxrpc_put_message(msg);
+}
+
+extern int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
+ struct rxrpc_call *call,
+ uint8_t type,
+ int count,
+ struct kvec *diov,
+ int alloc_flags,
+ struct rxrpc_message **_msg);
+
+extern int rxrpc_conn_sendmsg(struct rxrpc_connection *conn, struct rxrpc_message *msg);
+
+#endif /* _LINUX_RXRPC_MESSAGE_H */