/* 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, gfp_t alloc_flags, struct rxrpc_message **_msg); extern int rxrpc_conn_sendmsg(struct rxrpc_connection *conn, struct rxrpc_message *msg); #endif /* _LINUX_RXRPC_MESSAGE_H */