cregit-Linux how code gets into the kernel

Release 4.8 net/batman-adv/main.h

Directory: net/batman-adv
/* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _NET_BATMAN_ADV_MAIN_H_

#define _NET_BATMAN_ADV_MAIN_H_


#define BATADV_DRIVER_AUTHOR "Marek Lindner <mareklindner@neomailbox.ch>, " \
                             "Simon Wunderlich <sw@simonwunderlich.de>"

#define BATADV_DRIVER_DESC   "B.A.T.M.A.N. advanced"

#define BATADV_DRIVER_DEVICE "batman-adv"

#ifndef BATADV_SOURCE_VERSION

#define BATADV_SOURCE_VERSION "2016.3"
#endif

/* B.A.T.M.A.N. parameters */


#define BATADV_TQ_MAX_VALUE 255

#define BATADV_THROUGHPUT_MAX_VALUE 0xFFFFFFFF

#define BATADV_JITTER 20

/* Time To Live of broadcast messages */

#define BATADV_TTL 50

/* maximum sequence number age of broadcast messages */

#define BATADV_BCAST_MAX_AGE 64

/* purge originators after time in seconds if no valid packet comes in
 * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE
 */

#define BATADV_PURGE_TIMEOUT 200000 
/* 200 seconds */

#define BATADV_TT_LOCAL_TIMEOUT 600000 
/* in milliseconds */

#define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 
/* in milliseconds */

#define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 
/* in milliseconds */

#define BATADV_TT_WORK_PERIOD 5000 
/* 5 seconds */

#define BATADV_ORIG_WORK_PERIOD 1000 
/* 1 second */

#define BATADV_DAT_ENTRY_TIMEOUT (5 * 60000) 
/* 5 mins in milliseconds */
/* sliding packet range of received originator messages in sequence numbers
 * (should be a multiple of our word size)
 */

#define BATADV_TQ_LOCAL_WINDOW_SIZE 64
/* milliseconds we have to keep pending tt_req */

#define BATADV_TT_REQUEST_TIMEOUT 3000


#define BATADV_TQ_GLOBAL_WINDOW_SIZE 5

#define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1

#define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1

#define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1

/* B.A.T.M.A.N. V */

#define BATADV_THROUGHPUT_DEFAULT_VALUE 10 
/* 1 Mbps */

#define BATADV_ELP_PROBES_PER_NODE 2

#define BATADV_ELP_MIN_PROBE_SIZE 200 
/* bytes */

#define BATADV_ELP_PROBE_MAX_TX_DIFF 100 
/* milliseconds */

#define BATADV_ELP_MAX_AGE 64

#define BATADV_OGM_MAX_ORIGDIFF 5

#define BATADV_OGM_MAX_AGE 64

/* number of OGMs sent with the last tt diff */

#define BATADV_TT_OGM_APPEND_MAX 3

/* Time in which a client can roam at most ROAMING_MAX_COUNT times in
 * milliseconds
 */

#define BATADV_ROAMING_MAX_TIME 20000

#define BATADV_ROAMING_MAX_COUNT 5


#define BATADV_NO_FLAGS 0


#define BATADV_NULL_IFINDEX 0 
/* dummy ifindex used to avoid iface checks */


#define BATADV_NO_MARK 0

/* default interface for multi interface operation. The default interface is
 * used for communication which originated locally (i.e. is not forwarded)
 * or where special forwarding is not desired/necessary.
 */

#define BATADV_IF_DEFAULT	((struct batadv_hard_iface *)NULL)


#define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE)


#define BATADV_LOG_BUF_LEN 8192	  
/* has to be a power of 2 */

/* number of packets to send for broadcasts on different interface types */

#define BATADV_NUM_BCASTS_DEFAULT 1

#define BATADV_NUM_BCASTS_WIRELESS 3

#define BATADV_NUM_BCASTS_MAX 3

/* length of the single packet used by the TP meter */

#define BATADV_TP_PACKET_LEN ETH_DATA_LEN

/* msecs after which an ARP_REQUEST is sent in broadcast as fallback */

#define ARP_REQ_DELAY 250
/* numbers of originator to contact for any PUT/GET DHT operation */

#define BATADV_DAT_CANDIDATES_NUM 3

/* BATADV_TQ_SIMILARITY_THRESHOLD - TQ points that a secondary metric can differ
 * at most from the primary one in order to be still considered acceptable
 */

#define BATADV_TQ_SIMILARITY_THRESHOLD 50

/* should not be bigger than 512 bytes or change the size of
 * forw_packet->direct_link_flags
 */

#define BATADV_MAX_AGGREGATION_BYTES 512

#define BATADV_MAX_AGGREGATION_MS 100


#define BATADV_BLA_PERIOD_LENGTH	10000	
/* 10 seconds */

#define BATADV_BLA_BACKBONE_TIMEOUT	(BATADV_BLA_PERIOD_LENGTH * 6)

#define BATADV_BLA_CLAIM_TIMEOUT	(BATADV_BLA_PERIOD_LENGTH * 10)

#define BATADV_BLA_WAIT_PERIODS		3

#define BATADV_BLA_LOOPDETECT_PERIODS	6

#define BATADV_BLA_LOOPDETECT_TIMEOUT	3000	
/* 3 seconds */


#define BATADV_DUPLIST_SIZE		16

#define BATADV_DUPLIST_TIMEOUT		500	
/* 500 ms */
/* don't reset again within 30 seconds */

#define BATADV_RESET_PROTECTION_MS 30000

#define BATADV_EXPECTED_SEQNO_RANGE	65536


#define BATADV_NC_NODE_TIMEOUT 10000 
/* Milliseconds */

/**
 * BATADV_TP_MAX_NUM - maximum number of simultaneously active tp sessions
 */

#define BATADV_TP_MAX_NUM 5


enum batadv_mesh_state {
	
BATADV_MESH_INACTIVE,
	
BATADV_MESH_ACTIVE,
	
BATADV_MESH_DEACTIVATING,
};


#define BATADV_BCAST_QUEUE_LEN		256

#define BATADV_BATMAN_QUEUE_LEN	256


enum batadv_uev_action {
	
BATADV_UEV_ADD = 0,
	
BATADV_UEV_DEL,
	
BATADV_UEV_CHANGE,
	
BATADV_UEV_LOOPDETECT,
};


enum batadv_uev_type {
	
BATADV_UEV_GW = 0,
	
BATADV_UEV_BLA,
};


#define BATADV_GW_THRESHOLD	50

/* Number of fragment chains for each orig_node */

#define BATADV_FRAG_BUFFER_COUNT 8
/* Maximum number of fragments for one packet */

#define BATADV_FRAG_MAX_FRAGMENTS 16
/* Maxumim size of each fragment */

#define BATADV_FRAG_MAX_FRAG_SIZE 1400
/* Time to keep fragments while waiting for rest of the fragments */

#define BATADV_FRAG_TIMEOUT 10000


#define BATADV_DAT_CANDIDATE_NOT_FOUND	0

#define BATADV_DAT_CANDIDATE_ORIG	1

/* Debug Messages */
#ifdef pr_fmt

#undef pr_fmt
#endif
/* Append 'batman-adv: ' before kernel messages */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

/* Kernel headers */

#include <linux/bitops.h> /* for packet.h */
#include <linux/compiler.h>
#include <linux/cpumask.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h> /* for packet.h */
#include <linux/if_vlan.h>
#include <linux/jiffies.h>
#include <linux/percpu.h>
#include <linux/types.h>

#include "types.h"

struct net_device;
struct packet_type;
struct seq_file;
struct sk_buff;


#define BATADV_PRINT_VID(vid) ((vid & BATADV_VLAN_HAS_TAG) ? \
                               (int)(vid & VLAN_VID_MASK) : -1)

extern struct list_head batadv_hardif_list;

extern unsigned char batadv_broadcast_addr[];
extern struct workqueue_struct *batadv_event_workqueue;

int batadv_mesh_init(struct net_device *soft_iface);
void batadv_mesh_free(struct net_device *soft_iface);
bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr);
struct batadv_hard_iface *
batadv_seq_print_text_primary_if_get(struct seq_file *seq);
int batadv_max_header_len(void);
void batadv_skb_set_priority(struct sk_buff *skb, int offset);
int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
			   struct packet_type *ptype,
			   struct net_device *orig_dev);
int
batadv_recv_handler_register(u8 packet_type,
			     int (*recv_handler)(struct sk_buff *,
						 struct batadv_hard_iface *));
void batadv_recv_handler_unregister(u8 packet_type);
__be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr);

/**
 * batadv_compare_eth - Compare two not u16 aligned Ethernet addresses
 * @data1: Pointer to a six-byte array containing the Ethernet address
 * @data2: Pointer other six-byte array containing the Ethernet address
 *
 * note: can't use ether_addr_equal() as it requires aligned memory
 *
 * Return: true if they are the same ethernet addr
 */



static inline bool batadv_compare_eth(const void *data1, const void *data2)
{
	return ether_addr_equal_unaligned(data1, data2);
}


Contributors
PersonTokensPropCommitsCommitProp
marek lindnermarek lindner2080.00%120.00%


sven eckelmannsven eckelmann312.00%240.00%


markus pargmannmarkus pargmann14.00%120.00%


joe perchesjoe perches14.00%120.00%


Total25100.00%5100.00%



/**
 * batadv_has_timed_out - compares current time (jiffies) and timestamp +
 *  timeout
 * @timestamp:          base value to compare with (in jiffies)
 * @timeout:            added to base value before comparing (in milliseconds)
 *
 * Return: true if current time is after timestamp + timeout
 */



static inline bool batadv_has_timed_out(unsigned long timestamp,
					unsigned int timeout)
{
	return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout));
}


Contributors
PersonTokensPropCommitsCommitProp
martin hundebollmartin hundeboll2596.15%150.00%


sven eckelmannsven eckelmann13.85%150.00%


Total26100.00%2100.00%




#define batadv_atomic_dec_not_zero(v)	atomic_add_unless((v), -1, 0)

/* Returns the smallest signed integer in two's complement with the sizeof x */

#define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))

/* Checks if a sequence number x is a predecessor/successor of y.
 * they handle overflows/underflows and can correctly check for a
 * predecessor/successor unless the variable sequence number has grown by
 * more then 2**(bitwidth(x)-1)-1.
 * This means that for a u8 with the maximum value 255, it would think:
 *  - when adding nothing - it is neither a predecessor nor a successor
 *  - before adding more than 127 to the starting value - it is a predecessor,
 *  - when adding 128 - it is neither a predecessor nor a successor,
 *  - after adding more than 127 to the starting value - it is a successor
 */

#define batadv_seq_before(x, y) ({typeof(x)_d1 = (x); \
                                 typeof(y)_d2 = (y); \
                                 typeof(x)_dummy = (_d1 - _d2); \
                                 (void)(&_d1 == &_d2); \
                                 _dummy > batadv_smallest_signed_int(_dummy); })

#define batadv_seq_after(x, y) batadv_seq_before(y, x)

/* Stop preemption on local cpu while incrementing the counter */



static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx,
				      size_t count)
{
	this_cpu_add(bat_priv->bat_counters[idx], count);
}


Contributors
PersonTokensPropCommitsCommitProp
martin hundebollmartin hundeboll2686.67%133.33%


shan weishan wei310.00%133.33%


sven eckelmannsven eckelmann13.33%133.33%


Total30100.00%3100.00%




#define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1)

/**
 * batadv_sum_counter - Sum the cpu-local counters for index 'idx'
 * @bat_priv: the bat priv with all the soft interface information
 * @idx: index of counter to sum up
 *
 * Return: sum of all cpu-local counters
 */



static inline u64 batadv_sum_counter(struct batadv_priv *bat_priv,  size_t idx)
{
	u64 *counters, sum = 0;
	int cpu;

	for_each_possible_cpu(cpu) {
		counters = per_cpu_ptr(bat_priv->bat_counters, cpu);
		sum += counters[idx];
	}

	return sum;
}


Contributors
PersonTokensPropCommitsCommitProp
martin hundebollmartin hundeboll4686.79%125.00%


marek lindnermarek lindner47.55%125.00%


sven eckelmannsven eckelmann35.66%250.00%


Total53100.00%4100.00%



/* Define a macro to reach the control buffer of the skb. The members of the
 * control buffer are defined in struct batadv_skb_cb in types.h.
 * The macro is inspired by the similar macro TCP_SKB_CB() in tcp.h.
 */

#define BATADV_SKB_CB(__skb)       ((struct batadv_skb_cb *)&((__skb)->cb[0]))

unsigned short batadv_get_vid(struct sk_buff *skb, size_t header_len);
bool batadv_vlan_ap_isola_get(struct batadv_priv *bat_priv, unsigned short vid);

#endif /* _NET_BATMAN_ADV_MAIN_H_ */

Overall Contributors
PersonTokensPropCommitsCommitProp
sven eckelmannsven eckelmann27534.94%2227.50%


antonio quartulliantonio quartulli19024.14%2835.00%


martin hundebollmartin hundeboll14418.30%67.50%


marek lindnermarek lindner9812.45%911.25%


simon wunderlichsimon wunderlich567.12%911.25%


matthias schiffermatthias schiffer131.65%11.25%


linus lussinglinus lussing50.64%11.25%


shan weishan wei30.38%11.25%


markus pargmannmarkus pargmann20.25%22.50%


joe perchesjoe perches10.13%11.25%


Total787100.00%80100.00%

  
Directory: net/batman-adv



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