cregit-Linux how code gets into the kernel

Release 4.15 net/ax25/ax25_dev.c

Directory: net/ax25
/*
 * 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.
 *
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/spinlock.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/init.h>


ax25_dev *ax25_dev_list;

DEFINE_SPINLOCK(ax25_dev_lock);


ax25_dev *ax25_addr_ax25dev(ax25_address *addr) { ax25_dev *ax25_dev, *res = NULL; spin_lock_bh(&ax25_dev_lock); for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) { res = ax25_dev; } spin_unlock_bh(&ax25_dev_lock); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5269.33%133.33%
Ralf Bächle2330.67%266.67%
Total75100.00%3100.00%

/* * This is called when an interface is brought up. These are * reasonable defaults. */
void ax25_dev_device_up(struct net_device *dev) { ax25_dev *ax25_dev; if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) { printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n"); return; } dev->ax25_ptr = ax25_dev; ax25_dev->dev = dev; dev_hold(dev); ax25_dev->forward = NULL; ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE; ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF; ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE; ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW; ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW; ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1; ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2; ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3; ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE; ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) ax25_ds_setup_timer(ax25_dev); #endif spin_lock_bh(&ax25_dev_lock); ax25_dev->next = ax25_dev_list; ax25_dev_list = ax25_dev; spin_unlock_bh(&ax25_dev_lock); ax25_register_dev_sysctl(ax25_dev); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19683.05%433.33%
Andrew Morton177.20%18.33%
Ralf Bächle72.97%325.00%
Steven Whitehouse62.54%18.33%
Stephen Hemminger52.12%18.33%
Eric W. Biedermann41.69%18.33%
Jarek Poplawski10.42%18.33%
Total236100.00%12100.00%


void ax25_dev_device_down(struct net_device *dev) { ax25_dev *s, *ax25_dev; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) return; ax25_unregister_dev_sysctl(ax25_dev); spin_lock_bh(&ax25_dev_lock); #ifdef CONFIG_AX25_DAMA_SLAVE ax25_ds_del_timer(ax25_dev); #endif /* * Remove any packet forwarding that points to this device. */ for (s = ax25_dev_list; s != NULL; s = s->next) if (s->forward == dev) s->forward = NULL; if ((s = ax25_dev_list) == ax25_dev) { ax25_dev_list = s->next; spin_unlock_bh(&ax25_dev_lock); dev_put(dev); kfree(ax25_dev); return; } while (s != NULL && s->next != NULL) { if (s->next == ax25_dev) { s->next = ax25_dev->next; spin_unlock_bh(&ax25_dev_lock); dev_put(dev); kfree(ax25_dev); return; } s = s->next; } spin_unlock_bh(&ax25_dev_lock); dev->ax25_ptr = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15382.70%444.44%
Ralf Bächle126.49%222.22%
Stephen Hemminger105.41%111.11%
Steven Whitehouse63.24%111.11%
Eric W. Biedermann42.16%111.11%
Total185100.00%9100.00%


int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd) { ax25_dev *ax25_dev, *fwd_dev; if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL) return -EINVAL; switch (cmd) { case SIOCAX25ADDFWD: if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL) return -EINVAL; if (ax25_dev->forward != NULL) return -EINVAL; ax25_dev->forward = fwd_dev->dev; break; case SIOCAX25DELFWD: if (ax25_dev->forward == NULL) return -EINVAL; ax25_dev->forward = NULL; break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)121100.00%1100.00%
Total121100.00%1100.00%


struct net_device *ax25_fwd_dev(struct net_device *dev) { ax25_dev *ax25_dev; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) return dev; if (ax25_dev->forward == NULL) return dev; return ax25_dev->forward; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)48100.00%2100.00%
Total48100.00%2100.00%

/* * Free all memory associated with device structures. */
void __exit ax25_dev_free(void) { ax25_dev *s, *ax25_dev; spin_lock_bh(&ax25_dev_lock); ax25_dev = ax25_dev_list; while (ax25_dev != NULL) { s = ax25_dev; dev_put(ax25_dev->dev); ax25_dev = ax25_dev->next; kfree(s); } ax25_dev_list = NULL; spin_unlock_bh(&ax25_dev_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3858.46%350.00%
Ralf Bächle2030.77%233.33%
Stephen Hemminger710.77%116.67%
Total65100.00%6100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)67383.29%529.41%
Ralf Bächle678.29%423.53%
Stephen Hemminger222.72%15.88%
Andrew Morton172.10%15.88%
Steven Whitehouse121.49%15.88%
Eric W. Biedermann80.99%15.88%
Thomas Gleixner40.50%15.88%
Tejun Heo30.37%15.88%
Linus Torvalds10.12%15.88%
Jarek Poplawski10.12%15.88%
Total808100.00%17100.00%
Directory: net/ax25
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