cregit-Linux how code gets into the kernel

Release 4.11 net/rose/rose_loopback.c

Directory: net/rose
/*
 * 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/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/timer.h>
#include <net/ax25.h>
#include <linux/skbuff.h>
#include <net/rose.h>
#include <linux/init.h>


static struct sk_buff_head loopback_queue;

static struct timer_list loopback_timer;

static void rose_set_loopback_timer(void);


void rose_loopback_init(void) { skb_queue_head_init(&loopback_queue); init_timer(&loopback_timer); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19100.00%1100.00%
Total19100.00%1100.00%


static int rose_loopback_running(void) { return timer_pending(&loopback_timer); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15100.00%2100.00%
Total15100.00%2100.00%


int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh) { struct sk_buff *skbn; skbn = skb_clone(skb, GFP_ATOMIC); kfree_skb(skb); if (skbn != NULL) { skb_queue_tail(&loopback_queue, skbn); if (!rose_loopback_running()) rose_set_loopback_timer(); } return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)62100.00%1100.00%
Total62100.00%1100.00%

static void rose_loopback_timer(unsigned long);
static void rose_set_loopback_timer(void) { del_timer(&loopback_timer); loopback_timer.data = 0; loopback_timer.function = &rose_loopback_timer; loopback_timer.expires = jiffies + 10; add_timer(&loopback_timer); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)41100.00%1100.00%
Total41100.00%1100.00%


static void rose_loopback_timer(unsigned long param) { struct sk_buff *skb; struct net_device *dev; rose_address *dest; struct sock *sk; unsigned short frametype; unsigned int lci_i, lci_o; while ((skb = skb_dequeue(&loopback_queue)) != NULL) { if (skb->len < ROSE_MIN_LEN) { kfree_skb(skb); continue; } lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); frametype = skb->data[2]; if (frametype == ROSE_CALL_REQUEST && (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF || skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] != ROSE_CALL_REQ_ADDR_LEN_VAL)) { kfree_skb(skb); continue; } dest = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF); lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i; skb_reset_transport_header(skb); sk = rose_find_socket(lci_o, rose_loopback_neigh); if (sk) { if (rose_process_rx_frame(sk, skb) == 0) kfree_skb(skb); continue; } if (frametype == ROSE_CALL_REQUEST) { if ((dev = rose_dev_get(dest)) != NULL) { if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) kfree_skb(skb); } else { kfree_skb(skb); } } else { kfree_skb(skb); } } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20377.78%233.33%
Ben Hutchings4818.39%116.67%
Ralf Bächle41.53%116.67%
Bernard Pidoux31.15%116.67%
Arnaldo Carvalho de Melo31.15%116.67%
Total261100.00%6100.00%


void __exit rose_loopback_clear(void) { struct sk_buff *skb; del_timer(&loopback_timer); while ((skb = skb_dequeue(&loopback_queue)) != NULL) { skb->sk = NULL; kfree_skb(skb); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)46100.00%2100.00%
Total46100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)43287.45%440.00%
Ben Hutchings489.72%110.00%
Ralf Bächle51.01%220.00%
Arnaldo Carvalho de Melo30.61%110.00%
Tejun Heo30.61%110.00%
Bernard Pidoux30.61%110.00%
Total494100.00%10100.00%
Directory: net/rose
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