Release 4.15 net/llc/llc_core.c
/*
* llc_core.c - Minimum needed routines for sap handling and module init/exit
*
* Copyright (c) 1997 by Procom Technology, Inc.
* 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* This program can be redistributed or modified under the terms of the
* GNU General Public License as published by the Free Software Foundation.
* This program is distributed without any warranty or implied warranty
* of merchantability or fitness for a particular purpose.
*
* See the GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <net/net_namespace.h>
#include <net/llc.h>
LIST_HEAD(llc_sap_list);
static DEFINE_SPINLOCK(llc_sap_list_lock);
/**
* llc_sap_alloc - allocates and initializes sap.
*
* Allocates and initializes sap.
*/
static struct llc_sap *llc_sap_alloc(void)
{
struct llc_sap *sap = kzalloc(sizeof(*sap), GFP_ATOMIC);
int i;
if (sap) {
/* sap->laddr.mac - leave as a null, it's filled by bind */
sap->state = LLC_SAP_STATE_ACTIVE;
spin_lock_init(&sap->sk_lock);
for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++)
INIT_HLIST_NULLS_HEAD(&sap->sk_laddr_hash[i], i);
refcount_set(&sap->refcnt, 1);
}
return sap;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 54 | 60.67% | 2 | 25.00% |
| Octavian Purdila | 31 | 34.83% | 2 | 25.00% |
| Panagiotis Issaris | 1 | 1.12% | 1 | 12.50% |
| Joonwoo Park | 1 | 1.12% | 1 | 12.50% |
| Elena Reshetova | 1 | 1.12% | 1 | 12.50% |
| Adrian Bunk | 1 | 1.12% | 1 | 12.50% |
| Total | 89 | 100.00% | 8 | 100.00% |
static struct llc_sap *__llc_sap_find(unsigned char sap_value)
{
struct llc_sap *sap;
list_for_each_entry(sap, &llc_sap_list, node)
if (sap->laddr.lsap == sap_value)
goto out;
sap = NULL;
out:
return sap;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 47 | 100.00% | 4 | 100.00% |
| Total | 47 | 100.00% | 4 | 100.00% |
/**
* llc_sap_find - searchs a SAP in station
* @sap_value: sap to be found
*
* Searchs for a sap in the sap list of the LLC's station upon the sap ID.
* If the sap is found it will be refcounted and the user will have to do
* a llc_sap_put after use.
* Returns the sap or %NULL if not found.
*/
struct llc_sap *llc_sap_find(unsigned char sap_value)
{
struct llc_sap *sap;
rcu_read_lock_bh();
sap = __llc_sap_find(sap_value);
if (sap)
llc_sap_hold(sap);
rcu_read_unlock_bh();
return sap;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 37 | 90.24% | 2 | 66.67% |
| Octavian Purdila | 4 | 9.76% | 1 | 33.33% |
| Total | 41 | 100.00% | 3 | 100.00% |
/**
* llc_sap_open - open interface to the upper layers.
* @lsap: SAP number.
* @func: rcv func for datalink protos
*
* Interface function to upper layer. Each one who wants to get a SAP
* (for example NetBEUI) should call this function. Returns the opened
* SAP for success, NULL for failure.
*/
struct llc_sap *llc_sap_open(unsigned char lsap,
int (*func)(struct sk_buff *skb,
struct net_device *dev,
struct packet_type *pt,
struct net_device *orig_dev))
{
struct llc_sap *sap = NULL;
spin_lock_bh(&llc_sap_list_lock);
if (__llc_sap_find(lsap)) /* SAP already exists */
goto out;
sap = llc_sap_alloc();
if (!sap)
goto out;
sap->laddr.lsap = lsap;
sap->rcv_func = func;
list_add_tail_rcu(&sap->node, &llc_sap_list);
out:
spin_unlock_bh(&llc_sap_list_lock);
return sap;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 97 | 87.39% | 2 | 50.00% |
| Octavian Purdila | 9 | 8.11% | 1 | 25.00% |
| David S. Miller | 5 | 4.50% | 1 | 25.00% |
| Total | 111 | 100.00% | 4 | 100.00% |
/**
* llc_sap_close - close interface for upper layers.
* @sap: SAP to be closed.
*
* Close interface function to upper layer. Each one who wants to
* close an open SAP (for example NetBEUI) should call this function.
* Removes this sap from the list of saps in the station and then
* frees the memory for this sap.
*/
void llc_sap_close(struct llc_sap *sap)
{
WARN_ON(sap->sk_count);
spin_lock_bh(&llc_sap_list_lock);
list_del_rcu(&sap->node);
spin_unlock_bh(&llc_sap_list_lock);
synchronize_rcu();
kfree(sap);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 25 | 55.56% | 1 | 33.33% |
| Octavian Purdila | 20 | 44.44% | 2 | 66.67% |
| Total | 45 | 100.00% | 3 | 100.00% |
static struct packet_type llc_packet_type __read_mostly = {
.type = cpu_to_be16(ETH_P_802_2),
.func = llc_rcv,
};
static struct packet_type llc_tr_packet_type __read_mostly = {
.type = cpu_to_be16(ETH_P_TR_802_2),
.func = llc_rcv,
};
static int __init llc_init(void)
{
dev_add_pack(&llc_packet_type);
dev_add_pack(&llc_tr_packet_type);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static void __exit llc_exit(void)
{
dev_remove_pack(&llc_packet_type);
dev_remove_pack(&llc_tr_packet_type);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
module_init(llc_init);
module_exit(llc_exit);
EXPORT_SYMBOL(llc_sap_list);
EXPORT_SYMBOL(llc_sap_find);
EXPORT_SYMBOL(llc_sap_open);
EXPORT_SYMBOL(llc_sap_close);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Procom 1997, Jay Schullist 2001, Arnaldo C. Melo 2001-2003");
MODULE_DESCRIPTION("LLC IEEE 802.2 core support");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 420 | 82.68% | 4 | 22.22% |
| Octavian Purdila | 65 | 12.80% | 3 | 16.67% |
| David S. Miller | 8 | 1.57% | 2 | 11.11% |
| Stephen Hemminger | 3 | 0.59% | 2 | 11.11% |
| Eric W. Biedermann | 3 | 0.59% | 1 | 5.56% |
| Thomas Gleixner | 3 | 0.59% | 1 | 5.56% |
| Harvey Harrison | 2 | 0.39% | 1 | 5.56% |
| Joonwoo Park | 1 | 0.20% | 1 | 5.56% |
| Panagiotis Issaris | 1 | 0.20% | 1 | 5.56% |
| Elena Reshetova | 1 | 0.20% | 1 | 5.56% |
| Adrian Bunk | 1 | 0.20% | 1 | 5.56% |
| Total | 508 | 100.00% | 18 | 100.00% |
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