cregit-Linux how code gets into the kernel

Release 4.11 net/x25/x25_timer.c

Directory: net/x25
/*
 *      X.25 Packet Layer release 002
 *
 *      This is ALPHA test software. This code may break your machine,
 *      randomly fail to work with new releases, misbehave and/or generally
 *      screw up. It might even work.
 *
 *      This code REQUIRES 2.1.15 or higher
 *
 *      This module:
 *              This module 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.
 *
 *      History
 *      X.25 001        Jonathan Naylor Started coding.
 *      X.25 002        Jonathan Naylor New timer architecture.
 *                                      Centralised disconnection processing.
 */

#include <linux/errno.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/x25.h>

static void x25_heartbeat_expiry(unsigned long);
static void x25_timer_expiry(unsigned long);


void x25_init_timers(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); setup_timer(&x25->timer, x25_timer_expiry, (unsigned long)sk); /* initialized by sock_init_data */ sk->sk_timer.data = (unsigned long)sk; sk->sk_timer.function = &x25_heartbeat_expiry; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3051.72%120.00%
Vinay K. Nallamothu2034.48%120.00%
Pavel Emelyanov58.62%120.00%
Arnaldo Carvalho de Melo35.17%240.00%
Total58100.00%5100.00%


void x25_start_heartbeat(struct sock *sk) { mod_timer(&sk->sk_timer, jiffies + 5 * HZ); }

Contributors

PersonTokensPropCommitsCommitProp
Vinay K. Nallamothu1354.17%133.33%
Linus Torvalds (pre-git)1041.67%133.33%
Arnaldo Carvalho de Melo14.17%133.33%
Total24100.00%3100.00%


void x25_stop_heartbeat(struct sock *sk) { del_timer(&sk->sk_timer); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1794.44%150.00%
Arnaldo Carvalho de Melo15.56%150.00%
Total18100.00%2100.00%


void x25_start_t2timer(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); mod_timer(&x25->timer, jiffies + x25->t2); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2264.71%120.00%
David S. Miller823.53%120.00%
Arnaldo Carvalho de Melo25.88%240.00%
Vinay K. Nallamothu25.88%120.00%
Total34100.00%5100.00%


void x25_start_t21timer(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); mod_timer(&x25->timer, jiffies + x25->t21); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2264.71%120.00%
David S. Miller823.53%120.00%
Arnaldo Carvalho de Melo25.88%240.00%
Vinay K. Nallamothu25.88%120.00%
Total34100.00%5100.00%


void x25_start_t22timer(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); mod_timer(&x25->timer, jiffies + x25->t22); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2264.71%120.00%
David S. Miller823.53%120.00%
Vinay K. Nallamothu25.88%120.00%
Arnaldo Carvalho de Melo25.88%240.00%
Total34100.00%5100.00%


void x25_start_t23timer(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); mod_timer(&x25->timer, jiffies + x25->t23); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2264.71%233.33%
David S. Miller823.53%116.67%
Arnaldo Carvalho de Melo25.88%233.33%
Vinay K. Nallamothu25.88%116.67%
Total34100.00%6100.00%


void x25_stop_timer(struct sock *sk) { del_timer(&x25_sk(sk)->timer); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1885.71%150.00%
David S. Miller314.29%150.00%
Total21100.00%2100.00%


unsigned long x25_display_timer(struct sock *sk) { struct x25_sock *x25 = x25_sk(sk); if (!timer_pending(&x25->timer)) return 0; return x25->timer.expires - jiffies; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3477.27%240.00%
David S. Miller818.18%120.00%
Arnaldo Carvalho de Melo24.55%240.00%
Total44100.00%5100.00%


static void x25_heartbeat_expiry(unsigned long param) { struct sock *sk = (struct sock *)param; bh_lock_sock(sk); if (sock_owned_by_user(sk)) /* can currently only occur in state 3 */ goto restart_heartbeat; switch (x25_sk(sk)->state) { case X25_STATE_0: /* * Magic here: If we listen() and a new link dies * before it is accepted() it isn't 'dead' so doesn't * get removed. */ if (sock_flag(sk, SOCK_DESTROY) || (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) { bh_unlock_sock(sk); x25_destroy_socket_from_timer(sk); return; } break; case X25_STATE_3: /* * Check for the state of the receive buffer. */ x25_check_rbuf(sk); break; } restart_heartbeat: x25_start_heartbeat(sk); bh_unlock_sock(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6860.18%327.27%
Linus Torvalds2017.70%19.09%
Arnaldo Carvalho de Melo87.08%218.18%
Shaun Pereira65.31%19.09%
David S. Miller43.54%218.18%
James Morris43.54%19.09%
Benjamin LaHaise32.65%19.09%
Total113100.00%11100.00%

/* * Timer has expired, it may have been T2, T21, T22, or T23. We can tell * by the state machine state. */
static inline void x25_do_timer_expiry(struct sock * sk) { struct x25_sock *x25 = x25_sk(sk); switch (x25->state) { case X25_STATE_3: /* T2 */ if (x25->condition & X25_COND_ACK_PENDING) { x25->condition &= ~X25_COND_ACK_PENDING; x25_enquiry_response(sk); } break; case X25_STATE_1: /* T21 */ case X25_STATE_4: /* T22 */ x25_write_internal(sk, X25_CLEAR_REQUEST); x25->state = X25_STATE_2; x25_start_t23timer(sk); break; case X25_STATE_2: /* T23 */ x25_disconnect(sk, ETIMEDOUT, 0, 0); break; } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8686.00%233.33%
David S. Miller88.00%116.67%
Linus Torvalds44.00%116.67%
Arnaldo Carvalho de Melo22.00%233.33%
Total100100.00%6100.00%


static void x25_timer_expiry(unsigned long param) { struct sock *sk = (struct sock *)param; bh_lock_sock(sk); if (sock_owned_by_user(sk)) { /* can currently only occur in state 3 */ if (x25_sk(sk)->state == X25_STATE_3) x25_start_t2timer(sk); } else x25_do_timer_expiry(sk); bh_unlock_sock(sk); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds5890.62%133.33%
David S. Miller34.69%133.33%
Benjamin LaHaise34.69%133.33%
Total64100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)38262.21%421.05%
Linus Torvalds8213.36%15.26%
David S. Miller609.77%210.53%
Vinay K. Nallamothu416.68%15.26%
Arnaldo Carvalho de Melo264.23%526.32%
Benjamin LaHaise60.98%15.26%
Shaun Pereira60.98%15.26%
Pavel Emelyanov50.81%15.26%
James Morris40.65%15.26%
Hideaki Yoshifuji / 吉藤英明10.16%15.26%
Rusty Russell10.16%15.26%
Total614100.00%19100.00%
Directory: net/x25
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