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