mirror of
https://github.com/torvalds/linux.git
synced 2024-12-21 10:31:54 +00:00
7150ceaacb
The life-checking function, which is used by kAFS to make sure that a call is still live in the event of a pending signal, only samples the received packet serial number counter; it doesn't actually provoke a change in the counter, rather relying on the server to happen to give us a packet in the time window. Fix this by adding a function to force a ping to be transmitted. kAFS then keeps track of whether there's been a stall, and if so, uses the new function to ping the server, resetting the timeout to allow the reply to come back. If there's a stall, a ping and the call is *still* stalled in the same place after another period, then the call will be aborted. Fixes:bc5e3a546d("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals") Fixes:f4d15fb6f9("rxrpc: Provide functions for allowing cleaner handling of signals") Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/* RxRPC kernel service interface definitions
|
|
*
|
|
* Copyright (C) 2007 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 _NET_RXRPC_H
|
|
#define _NET_RXRPC_H
|
|
|
|
#include <linux/rxrpc.h>
|
|
#include <linux/ktime.h>
|
|
|
|
struct key;
|
|
struct sock;
|
|
struct socket;
|
|
struct rxrpc_call;
|
|
|
|
/*
|
|
* Call completion condition (state == RXRPC_CALL_COMPLETE).
|
|
*/
|
|
enum rxrpc_call_completion {
|
|
RXRPC_CALL_SUCCEEDED, /* - Normal termination */
|
|
RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
|
|
RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
|
|
RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
|
|
RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
|
|
NR__RXRPC_CALL_COMPLETIONS
|
|
};
|
|
|
|
/*
|
|
* Debug ID counter for tracing.
|
|
*/
|
|
extern atomic_t rxrpc_debug_id;
|
|
|
|
typedef void (*rxrpc_notify_rx_t)(struct sock *, struct rxrpc_call *,
|
|
unsigned long);
|
|
typedef void (*rxrpc_notify_end_tx_t)(struct sock *, struct rxrpc_call *,
|
|
unsigned long);
|
|
typedef void (*rxrpc_notify_new_call_t)(struct sock *, struct rxrpc_call *,
|
|
unsigned long);
|
|
typedef void (*rxrpc_discard_new_call_t)(struct rxrpc_call *, unsigned long);
|
|
typedef void (*rxrpc_user_attach_call_t)(struct rxrpc_call *, unsigned long);
|
|
|
|
void rxrpc_kernel_new_call_notification(struct socket *,
|
|
rxrpc_notify_new_call_t,
|
|
rxrpc_discard_new_call_t);
|
|
struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
|
|
struct sockaddr_rxrpc *,
|
|
struct key *,
|
|
unsigned long,
|
|
s64,
|
|
gfp_t,
|
|
rxrpc_notify_rx_t,
|
|
bool,
|
|
unsigned int);
|
|
int rxrpc_kernel_send_data(struct socket *, struct rxrpc_call *,
|
|
struct msghdr *, size_t,
|
|
rxrpc_notify_end_tx_t);
|
|
int rxrpc_kernel_recv_data(struct socket *, struct rxrpc_call *,
|
|
struct iov_iter *, bool, u32 *, u16 *);
|
|
bool rxrpc_kernel_abort_call(struct socket *, struct rxrpc_call *,
|
|
u32, int, const char *);
|
|
void rxrpc_kernel_end_call(struct socket *, struct rxrpc_call *);
|
|
void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
|
|
struct sockaddr_rxrpc *);
|
|
u64 rxrpc_kernel_get_rtt(struct socket *, struct rxrpc_call *);
|
|
int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t,
|
|
rxrpc_user_attach_call_t, unsigned long, gfp_t,
|
|
unsigned int);
|
|
void rxrpc_kernel_set_tx_length(struct socket *, struct rxrpc_call *, s64);
|
|
int rxrpc_kernel_retry_call(struct socket *, struct rxrpc_call *,
|
|
struct sockaddr_rxrpc *, struct key *);
|
|
int rxrpc_kernel_check_call(struct socket *, struct rxrpc_call *,
|
|
enum rxrpc_call_completion *, u32 *);
|
|
u32 rxrpc_kernel_check_life(const struct socket *, const struct rxrpc_call *);
|
|
void rxrpc_kernel_probe_life(struct socket *, struct rxrpc_call *);
|
|
u32 rxrpc_kernel_get_epoch(struct socket *, struct rxrpc_call *);
|
|
bool rxrpc_kernel_get_reply_time(struct socket *, struct rxrpc_call *,
|
|
ktime_t *);
|
|
|
|
#endif /* _NET_RXRPC_H */
|