diff options
Diffstat (limited to 'net/decnet/dn_timer.c')
| -rw-r--r-- | net/decnet/dn_timer.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/net/decnet/dn_timer.c b/net/decnet/dn_timer.c deleted file mode 100644 index aa4155875..000000000 --- a/net/decnet/dn_timer.c +++ /dev/null @@ -1,104 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * DECnet An implementation of the DECnet protocol suite for the LINUX - * operating system. DECnet is implemented using the BSD Socket - * interface as the means of communication with the user level. - * - * DECnet Socket Timer Functions - * - * Author: Steve Whitehouse <SteveW@ACM.org> - * - * - * Changes: - * Steve Whitehouse : Made keepalive timer part of the same - * timer idea. - * Steve Whitehouse : Added checks for sk->sock_readers - * David S. Miller : New socket locking - * Steve Whitehouse : Timer grabs socket ref. - */ -#include <linux/net.h> -#include <linux/socket.h> -#include <linux/skbuff.h> -#include <linux/netdevice.h> -#include <linux/timer.h> -#include <linux/spinlock.h> -#include <net/sock.h> -#include <linux/atomic.h> -#include <linux/jiffies.h> -#include <net/flow.h> -#include <net/dn.h> - -/* - * Slow timer is for everything else (n * 500mS) - */ - -#define SLOW_INTERVAL (HZ/2) - -static void dn_slow_timer(struct timer_list *t); - -void dn_start_slow_timer(struct sock *sk) -{ - timer_setup(&sk->sk_timer, dn_slow_timer, 0); - sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL); -} - -void dn_stop_slow_timer(struct sock *sk) -{ - sk_stop_timer(sk, &sk->sk_timer); -} - -static void dn_slow_timer(struct timer_list *t) -{ - struct sock *sk = from_timer(sk, t, sk_timer); - struct dn_scp *scp = DN_SK(sk); - - bh_lock_sock(sk); - - if (sock_owned_by_user(sk)) { - sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 10); - goto out; - } - - /* - * The persist timer is the standard slow timer used for retransmits - * in both connection establishment and disconnection as well as - * in the RUN state. The different states are catered for by changing - * the function pointer in the socket. Setting the timer to a value - * of zero turns it off. We allow the persist_fxn to turn the - * timer off in a permant way by returning non-zero, so that - * timer based routines may remove sockets. This is why we have a - * sock_hold()/sock_put() around the timer to prevent the socket - * going away in the middle. - */ - if (scp->persist && scp->persist_fxn) { - if (scp->persist <= SLOW_INTERVAL) { - scp->persist = 0; - - if (scp->persist_fxn(sk)) - goto out; - } else { - scp->persist -= SLOW_INTERVAL; - } - } - - /* - * Check for keepalive timeout. After the other timer 'cos if - * the previous timer caused a retransmit, we don't need to - * do this. scp->stamp is the last time that we sent a packet. - * The keepalive function sends a link service packet to the - * other end. If it remains unacknowledged, the standard - * socket timers will eventually shut the socket down. Each - * time we do this, scp->stamp will be updated, thus - * we won't try and send another until scp->keepalive has passed - * since the last successful transmission. - */ - if (scp->keepalive && scp->keepalive_fxn && (scp->state == DN_RUN)) { - if (time_after_eq(jiffies, scp->stamp + scp->keepalive)) - scp->keepalive_fxn(sk); - } - - sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL); -out: - bh_unlock_sock(sk); - sock_put(sk); -} |