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Merge branch 'batman-adv/next' of git://git.open-mesh.org/ecsv/linux-merge

This commit is contained in:
David S. Miller 2011-06-20 12:59:37 -07:00
parent 1b9c4134c1 43676ab590
commit eac56465b8
27 changed files with 2085 additions and 467 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/batman-adv/Kconfig
View File

@ -5,6 +5,7 @@
config BATMAN_ADV
tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
depends on NET
select CRC16
default n
---help---

25
net/batman-adv/aggregation.c
View File

@ -20,17 +20,12 @@
*/
#include "main.h"
#include "translation-table.h"
#include "aggregation.h"
#include "send.h"
#include "routing.h"
#include "hard-interface.h"
/* calculate the size of the tt information for a given packet */
static int tt_len(const struct batman_packet *batman_packet)
{
return batman_packet->num_tt * ETH_ALEN;
}
/* return true if new_packet can be aggregated with forw_packet */
static bool can_aggregate_with(const struct batman_packet *new_batman_packet,
int packet_len,
@ -195,7 +190,7 @@ static void aggregate(struct forw_packet *forw_packet_aggr,
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming, char own_packet,
struct hard_iface *if_incoming, int own_packet,
unsigned long send_time)
{
/**
@ -264,18 +259,20 @@ void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
batman_packet = (struct batman_packet *)packet_buff;
do {
/* network to host order for our 32bit seqno, and the
orig_interval. */
/* network to host order for our 32bit seqno and the
orig_interval */
batman_packet->seqno = ntohl(batman_packet->seqno);
batman_packet->tt_crc = ntohs(batman_packet->tt_crc);
tt_buff = packet_buff + buff_pos + BAT_PACKET_LEN;
receive_bat_packet(ethhdr, batman_packet,
tt_buff, tt_len(batman_packet),
if_incoming);
buff_pos += BAT_PACKET_LEN + tt_len(batman_packet);
receive_bat_packet(ethhdr, batman_packet, tt_buff, if_incoming);
buff_pos += BAT_PACKET_LEN +
tt_len(batman_packet->tt_num_changes);
batman_packet = (struct batman_packet *)
(packet_buff + buff_pos);
} while (aggregated_packet(buff_pos, packet_len,
batman_packet->num_tt));
batman_packet->tt_num_changes));
}

8
net/batman-adv/aggregation.h
View File

@ -25,9 +25,11 @@
#include "main.h"
/* is there another aggregated packet here? */
static inline int aggregated_packet(int buff_pos, int packet_len, int num_tt)
static inline int aggregated_packet(int buff_pos, int packet_len,
int tt_num_changes)
{
int next_buff_pos = buff_pos + BAT_PACKET_LEN + (num_tt * ETH_ALEN);
int next_buff_pos = buff_pos + BAT_PACKET_LEN + (tt_num_changes *
sizeof(struct tt_change));
return (next_buff_pos <= packet_len) &&
(next_buff_pos <= MAX_AGGREGATION_BYTES);
@ -35,7 +37,7 @@ static inline int aggregated_packet(int buff_pos, int packet_len, int num_tt)
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
struct hard_iface *if_incoming, char own_packet,
struct hard_iface *if_incoming, int own_packet,
unsigned long send_time);
void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
unsigned char *packet_buff, int packet_len,

73
net/batman-adv/bat_sysfs.c
View File

@ -40,6 +40,20 @@ static struct bat_priv *kobj_to_batpriv(struct kobject *obj)
return netdev_priv(net_dev);
}
#define UEV_TYPE_VAR "BATTYPE="
#define UEV_ACTION_VAR "BATACTION="
#define UEV_DATA_VAR "BATDATA="
static char *uev_action_str[] = {
"add",
"del",
"change"
};
static char *uev_type_str[] = {
"gw"
};
/* Use this, if you have customized show and store functions */
#define BAT_ATTR(_name, _mode, _show, _store) \
struct bat_attribute bat_attr_##_name = { \
@ -375,7 +389,7 @@ BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
store_gw_bwidth);
#ifdef CONFIG_BATMAN_ADV_DEBUG
BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 3, NULL);
BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 7, NULL);
#endif
static struct bat_attribute *mesh_attrs[] = {
@ -601,3 +615,60 @@ void sysfs_del_hardif(struct kobject **hardif_obj)
kobject_put(*hardif_obj);
*hardif_obj = NULL;
}
int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
enum uev_action action, const char *data)
{
int ret = -1;
struct hard_iface *primary_if = NULL;
struct kobject *bat_kobj;
char *uevent_env[4] = { NULL, NULL, NULL, NULL };
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
bat_kobj = &primary_if->soft_iface->dev.kobj;
uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
strlen(uev_type_str[type]) + 1,
GFP_ATOMIC);
if (!uevent_env[0])
goto out;
sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
strlen(uev_action_str[action]) + 1,
GFP_ATOMIC);
if (!uevent_env[1])
goto out;
sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
/* If the event is DEL, ignore the data field */
if (action != UEV_DEL) {
uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
strlen(data) + 1, GFP_ATOMIC);
if (!uevent_env[2])
goto out;
sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
}
ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
out:
kfree(uevent_env[0]);
kfree(uevent_env[1]);
kfree(uevent_env[2]);
if (primary_if)
hardif_free_ref(primary_if);
if (ret)
bat_dbg(DBG_BATMAN, bat_priv, "Impossible to send "
"uevent for (%s,%s,%s) event (err: %d)\n",
uev_type_str[type], uev_action_str[action],
(action == UEV_DEL ? "NULL" : data), ret);
return ret;
}

2
net/batman-adv/bat_sysfs.h
View File

@ -38,5 +38,7 @@ int sysfs_add_meshif(struct net_device *dev);
void sysfs_del_meshif(struct net_device *dev);
int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev);
void sysfs_del_hardif(struct kobject **hardif_obj);
int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
enum uev_action action, const char *data);
#endif /* _NET_BATMAN_ADV_SYSFS_H_ */

8
net/batman-adv/bitarray.c
View File

@ -26,8 +26,8 @@
/* returns true if the corresponding bit in the given seq_bits indicates true
* and curr_seqno is within range of last_seqno */
uint8_t get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
uint32_t curr_seqno)
int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
uint32_t curr_seqno)
{
int32_t diff, word_offset, word_num;
@ -127,8 +127,8 @@ static void bit_reset_window(unsigned long *seq_bits)
* 1 if the window was moved (either new or very old)
* 0 if the window was not moved/shifted.
*/
char bit_get_packet(void *priv, unsigned long *seq_bits,
int32_t seq_num_diff, int8_t set_mark)
int bit_get_packet(void *priv, unsigned long *seq_bits,
int32_t seq_num_diff, int set_mark)
{
struct bat_priv *bat_priv = priv;

8
net/batman-adv/bitarray.h
View File

@ -26,8 +26,8 @@
/* returns true if the corresponding bit in the given seq_bits indicates true
* and curr_seqno is within range of last_seqno */
uint8_t get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
uint32_t curr_seqno);
int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
uint32_t curr_seqno);
/* turn corresponding bit on, so we can remember that we got the packet */
void bit_mark(unsigned long *seq_bits, int32_t n);
@ -35,8 +35,8 @@ void bit_mark(unsigned long *seq_bits, int32_t n);
/* receive and process one packet, returns 1 if received seq_num is considered
* new, 0 if old */
char bit_get_packet(void *priv, unsigned long *seq_bits,
int32_t seq_num_diff, int8_t set_mark);
int bit_get_packet(void *priv, unsigned long *seq_bits,
int32_t seq_num_diff, int set_mark);
/* count the hamming weight, how many good packets did we receive? */
int bit_packet_count(const unsigned long *seq_bits);

246
net/batman-adv/gateway_client.c
View File

@ -20,15 +20,22 @@
*/
#include "main.h"
#include "bat_sysfs.h"
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
#include "originator.h"
#include "routing.h"
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/if_vlan.h>
/* This is the offset of the options field in a dhcp packet starting at
* the beginning of the dhcp header */
#define DHCP_OPTIONS_OFFSET 240
#define DHCP_REQUEST 3
static void gw_node_free_ref(struct gw_node *gw_node)
{
if (atomic_dec_and_test(&gw_node->refcount))
@ -97,40 +104,19 @@ static void gw_select(struct bat_priv *bat_priv, struct gw_node *new_gw_node)
void gw_deselect(struct bat_priv *bat_priv)
{
gw_select(bat_priv, NULL);
atomic_set(&bat_priv->gw_reselect, 1);
}
void gw_election(struct bat_priv *bat_priv)
static struct gw_node *gw_get_best_gw_node(struct bat_priv *bat_priv)
{
struct hlist_node *node;
struct gw_node *gw_node, *curr_gw = NULL, *curr_gw_tmp = NULL;
struct neigh_node *router;
uint8_t max_tq = 0;
struct hlist_node *node;
struct gw_node *gw_node, *curr_gw = NULL;
uint32_t max_gw_factor = 0, tmp_gw_factor = 0;
uint8_t max_tq = 0;
int down, up;
/**
* The batman daemon checks here if we already passed a full originator
* cycle in order to make sure we don't choose the first gateway we
* hear about. This check is based on the daemon's uptime which we
* don't have.
**/
if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
return;
curr_gw = gw_get_selected_gw_node(bat_priv);
if (curr_gw)
goto out;
rcu_read_lock();
if (hlist_empty(&bat_priv->gw_list)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Removing selected gateway - "
"no gateway in range\n");
gw_deselect(bat_priv);
goto unlock;
}
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
if (gw_node->deleted)
continue;
@ -139,6 +125,9 @@ void gw_election(struct bat_priv *bat_priv)
if (!router)
continue;
if (!atomic_inc_not_zero(&gw_node->refcount))
goto next;
switch (atomic_read(&bat_priv->gw_sel_class)) {
case 1: /* fast connection */
gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags,
@ -151,8 +140,12 @@ void gw_election(struct bat_priv *bat_priv)
if ((tmp_gw_factor > max_gw_factor) ||
((tmp_gw_factor == max_gw_factor) &&
(router->tq_avg > max_tq)))
curr_gw_tmp = gw_node;
(router->tq_avg > max_tq))) {
if (curr_gw)
gw_node_free_ref(curr_gw);
curr_gw = gw_node;
atomic_inc(&curr_gw->refcount);
}
break;
default: /**
@ -163,8 +156,12 @@ void gw_election(struct bat_priv *bat_priv)
* soon as a better gateway appears which has
* $routing_class more tq points)
**/
if (router->tq_avg > max_tq)
curr_gw_tmp = gw_node;
if (router->tq_avg > max_tq) {
if (curr_gw)
gw_node_free_ref(curr_gw);
curr_gw = gw_node;
atomic_inc(&curr_gw->refcount);
}
break;
}
@ -174,42 +171,81 @@ void gw_election(struct bat_priv *bat_priv)
if (tmp_gw_factor > max_gw_factor)
max_gw_factor = tmp_gw_factor;
gw_node_free_ref(gw_node);
next:
neigh_node_free_ref(router);
}
if (curr_gw != curr_gw_tmp) {
router = orig_node_get_router(curr_gw_tmp->orig_node);
if (!router)
goto unlock;
if ((curr_gw) && (!curr_gw_tmp))
bat_dbg(DBG_BATMAN, bat_priv,
"Removing selected gateway - "
"no gateway in range\n");
else if ((!curr_gw) && (curr_gw_tmp))
bat_dbg(DBG_BATMAN, bat_priv,
"Adding route to gateway %pM "
"(gw_flags: %i, tq: %i)\n",
curr_gw_tmp->orig_node->orig,
curr_gw_tmp->orig_node->gw_flags,
router->tq_avg);
else
bat_dbg(DBG_BATMAN, bat_priv,
"Changing route to gateway %pM "
"(gw_flags: %i, tq: %i)\n",
curr_gw_tmp->orig_node->orig,
curr_gw_tmp->orig_node->gw_flags,
router->tq_avg);
neigh_node_free_ref(router);
gw_select(bat_priv, curr_gw_tmp);
}
unlock:
rcu_read_unlock();
return curr_gw;
}
void gw_election(struct bat_priv *bat_priv)
{
struct gw_node *curr_gw = NULL, *next_gw = NULL;
struct neigh_node *router = NULL;
char gw_addr[18] = { '\0' };
/**
* The batman daemon checks here if we already passed a full originator
* cycle in order to make sure we don't choose the first gateway we
* hear about. This check is based on the daemon's uptime which we
* don't have.
**/
if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
goto out;
if (!atomic_dec_not_zero(&bat_priv->gw_reselect))
goto out;
curr_gw = gw_get_selected_gw_node(bat_priv);
next_gw = gw_get_best_gw_node(bat_priv);
if (curr_gw == next_gw)
goto out;
if (next_gw) {
sprintf(gw_addr, "%pM", next_gw->orig_node->orig);
router = orig_node_get_router(next_gw->orig_node);
if (!router) {
gw_deselect(bat_priv);
goto out;
}
}
if ((curr_gw) && (!next_gw)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Removing selected gateway - no gateway in range\n");
throw_uevent(bat_priv, UEV_GW, UEV_DEL, NULL);
} else if ((!curr_gw) && (next_gw)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Adding route to gateway %pM (gw_flags: %i, tq: %i)\n",
next_gw->orig_node->orig,
next_gw->orig_node->gw_flags,
router->tq_avg);
throw_uevent(bat_priv, UEV_GW, UEV_ADD, gw_addr);
} else {
bat_dbg(DBG_BATMAN, bat_priv,
"Changing route to gateway %pM "
"(gw_flags: %i, tq: %i)\n",
next_gw->orig_node->orig,
next_gw->orig_node->gw_flags,
router->tq_avg);
throw_uevent(bat_priv, UEV_GW, UEV_CHANGE, gw_addr);
}
gw_select(bat_priv, next_gw);
out:
if (curr_gw)
gw_node_free_ref(curr_gw);
if (next_gw)
gw_node_free_ref(next_gw);
if (router)
neigh_node_free_ref(router);
}
void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
@ -360,7 +396,7 @@ void gw_node_purge(struct bat_priv *bat_priv)
struct gw_node *gw_node, *curr_gw;
struct hlist_node *node, *node_tmp;
unsigned long timeout = 2 * PURGE_TIMEOUT * HZ;
char do_deselect = 0;
int do_deselect = 0;
curr_gw = gw_get_selected_gw_node(bat_priv);
@ -479,14 +515,75 @@ out:
return ret;
}
int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
static bool is_type_dhcprequest(struct sk_buff *skb, int header_len)
{
int ret = false;
unsigned char *p;
int pkt_len;
if (skb_linearize(skb) < 0)
goto out;
pkt_len = skb_headlen(skb);
if (pkt_len < header_len + DHCP_OPTIONS_OFFSET + 1)
goto out;
p = skb->data + header_len + DHCP_OPTIONS_OFFSET;
pkt_len -= header_len + DHCP_OPTIONS_OFFSET + 1;
/* Access the dhcp option lists. Each entry is made up by:
* - octect 1: option type
* - octect 2: option data len (only if type != 255 and 0)
* - octect 3: option data */
while (*p != 255 && !ret) {
/* p now points to the first octect: option type */
if (*p == 53) {
/* type 53 is the message type option.
* Jump the len octect and go to the data octect */
if (pkt_len < 2)
goto out;
p += 2;
/* check if the message type is what we need */
if (*p == DHCP_REQUEST)
ret = true;
break;
} else if (*p == 0) {
/* option type 0 (padding), just go forward */
if (pkt_len < 1)
goto out;
pkt_len--;
p++;
} else {
/* This is any other option. So we get the length... */
if (pkt_len < 1)
goto out;
pkt_len--;
p++;
/* ...and then we jump over the data */
if (pkt_len < *p)
goto out;
pkt_len -= *p;
p += (*p);
}
}
out:
return ret;
}
int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb,
struct orig_node *old_gw)
{
struct ethhdr *ethhdr;
struct iphdr *iphdr;
struct ipv6hdr *ipv6hdr;
struct udphdr *udphdr;
struct gw_node *curr_gw;
struct neigh_node *neigh_curr = NULL, *neigh_old = NULL;
unsigned int header_len = 0;
int ret = 1;
if (atomic_read(&bat_priv->gw_mode) == GW_MODE_OFF)
return 0;
@ -554,7 +651,30 @@ int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
if (!curr_gw)
return 0;
/* If old_gw != NULL then this packet is unicast.
* So, at this point we have to check the message type: if it is a
* DHCPREQUEST we have to decide whether to drop it or not */
if (old_gw && curr_gw->orig_node != old_gw) {
if (is_type_dhcprequest(skb, header_len)) {
/* If the dhcp packet has been sent to a different gw,
* we have to evaluate whether the old gw is still
* reliable enough */
neigh_curr = find_router(bat_priv, curr_gw->orig_node,
NULL);
neigh_old = find_router(bat_priv, old_gw, NULL);
if (!neigh_curr || !neigh_old)
goto free_neigh;
if (neigh_curr->tq_avg - neigh_old->tq_avg <
GW_THRESHOLD)
ret = -1;
}
}
free_neigh:
if (neigh_old)
neigh_node_free_ref(neigh_old);
if (neigh_curr)
neigh_node_free_ref(neigh_curr);
if (curr_gw)
gw_node_free_ref(curr_gw);
return 1;
return ret;
}

3
net/batman-adv/gateway_client.h
View File

@ -31,6 +31,7 @@ void gw_node_update(struct bat_priv *bat_priv,
void gw_node_delete(struct bat_priv *bat_priv, struct orig_node *orig_node);
void gw_node_purge(struct bat_priv *bat_priv);
int gw_client_seq_print_text(struct seq_file *seq, void *offset);
int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb);
int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb,
struct orig_node *old_gw);
#endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */

6
net/batman-adv/gateway_common.c
View File

@ -61,9 +61,9 @@ static void kbit_to_gw_bandwidth(int down, int up, long *gw_srv_class)
/* returns the up and downspeeds in kbit, calculated from the class */
void gw_bandwidth_to_kbit(uint8_t gw_srv_class, int *down, int *up)
{
char sbit = (gw_srv_class & 0x80) >> 7;
char dpart = (gw_srv_class & 0x78) >> 3;
char upart = (gw_srv_class & 0x07);
int sbit = (gw_srv_class & 0x80) >> 7;
int dpart = (gw_srv_class & 0x78) >> 3;
int upart = (gw_srv_class & 0x07);
if (!gw_srv_class) {
*down = 0;

17
net/batman-adv/hard-interface.c
View File

@ -152,12 +152,6 @@ static void primary_if_select(struct bat_priv *bat_priv,
batman_packet->ttl = TTL;
primary_if_update_addr(bat_priv);
/***
* hacky trick to make sure that we send the TT information via
* our new primary interface
*/
atomic_set(&bat_priv->tt_local_changed, 1);
}
static bool hardif_is_iface_up(const struct hard_iface *hard_iface)
@ -340,7 +334,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
batman_packet->flags = NO_FLAGS;
batman_packet->ttl = 2;
batman_packet->tq = TQ_MAX_VALUE;
batman_packet->num_tt = 0;
batman_packet->tt_num_changes = 0;
batman_packet->ttvn = 0;
hard_iface->if_num = bat_priv->num_ifaces;
bat_priv->num_ifaces++;
@ -659,6 +654,14 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
case BAT_VIS:
ret = recv_vis_packet(skb, hard_iface);
break;
/* Translation table query (request or response) */
case BAT_TT_QUERY:
ret = recv_tt_query(skb, hard_iface);
break;
/* Roaming advertisement */
case BAT_ROAM_ADV:
ret = recv_roam_adv(skb, hard_iface);
break;
default:
ret = NET_RX_DROP;
}

18
net/batman-adv/main.c
View File

@ -84,8 +84,10 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->forw_bat_list_lock);
spin_lock_init(&bat_priv->forw_bcast_list_lock);
spin_lock_init(&bat_priv->tt_lhash_lock);
spin_lock_init(&bat_priv->tt_ghash_lock);
spin_lock_init(&bat_priv->tt_changes_list_lock);
spin_lock_init(&bat_priv->tt_req_list_lock);
spin_lock_init(&bat_priv->tt_roam_list_lock);
spin_lock_init(&bat_priv->tt_buff_lock);
spin_lock_init(&bat_priv->gw_list_lock);
spin_lock_init(&bat_priv->vis_hash_lock);
spin_lock_init(&bat_priv->vis_list_lock);
@ -96,14 +98,14 @@ int mesh_init(struct net_device *soft_iface)
INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
INIT_HLIST_HEAD(&bat_priv->gw_list);
INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
INIT_LIST_HEAD(&bat_priv->tt_changes_list);
INIT_LIST_HEAD(&bat_priv->tt_req_list);
INIT_LIST_HEAD(&bat_priv->tt_roam_list);
if (originator_init(bat_priv) < 1)
goto err;
if (tt_local_init(bat_priv) < 1)
goto err;
if (tt_global_init(bat_priv) < 1)
if (tt_init(bat_priv) < 1)
goto err;
tt_local_add(soft_iface, soft_iface->dev_addr);
@ -111,6 +113,7 @@ int mesh_init(struct net_device *soft_iface)
if (vis_init(bat_priv) < 1)
goto err;
atomic_set(&bat_priv->gw_reselect, 0);
atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
goto end;
@ -137,8 +140,7 @@ void mesh_free(struct net_device *soft_iface)
gw_node_purge(bat_priv);
originator_free(bat_priv);
tt_local_free(bat_priv);
tt_global_free(bat_priv);
tt_free(bat_priv);
softif_neigh_purge(bat_priv);

27
net/batman-adv/main.h
View File

@ -42,15 +42,23 @@
* -> TODO: check influence on TQ_LOCAL_WINDOW_SIZE */
#define PURGE_TIMEOUT 200
#define TT_LOCAL_TIMEOUT 3600 /* in seconds */
#define TT_CLIENT_ROAM_TIMEOUT 600
/* sliding packet range of received originator messages in squence numbers
* (should be a multiple of our word size) */
#define TQ_LOCAL_WINDOW_SIZE 64
#define TT_REQUEST_TIMEOUT 3 /* seconds we have to keep pending tt_req */
#define TQ_GLOBAL_WINDOW_SIZE 5
#define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
#define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
#define TQ_TOTAL_BIDRECT_LIMIT 1
#define TT_OGM_APPEND_MAX 3 /* number of OGMs sent with the last tt diff */
#define ROAMING_MAX_TIME 20 /* Time in which a client can roam at most
* ROAMING_MAX_COUNT times */
#define ROAMING_MAX_COUNT 5
#define NO_FLAGS 0
#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
@ -83,6 +91,18 @@ enum mesh_state {
#define BCAST_QUEUE_LEN 256
#define BATMAN_QUEUE_LEN 256
enum uev_action {
UEV_ADD = 0,
UEV_DEL,
UEV_CHANGE
};
enum uev_type {
UEV_GW = 0
};
#define GW_THRESHOLD 50
/*
* Debug Messages
*/
@ -96,7 +116,8 @@ enum mesh_state {
enum dbg_level {
DBG_BATMAN = 1 << 0,
DBG_ROUTES = 1 << 1, /* route added / changed / deleted */
DBG_ALL = 3
DBG_TT = 1 << 2, /* translation table operations */
DBG_ALL = 7
};
@ -151,7 +172,7 @@ int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) __printf(2, 3);
while (0)
#else /* !CONFIG_BATMAN_ADV_DEBUG */
__printf(3, 4)
static inline void bat_dbg(char type __always_unused,
static inline void bat_dbg(int type __always_unused,
struct bat_priv *bat_priv __always_unused,
const char *fmt __always_unused, ...)
{

17
net/batman-adv/originator.c
View File

@ -37,6 +37,14 @@ static void start_purge_timer(struct bat_priv *bat_priv)
queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
}
/* returns 1 if they are the same originator */
static int compare_orig(const struct hlist_node *node, const void *data2)
{
const void *data1 = container_of(node, struct orig_node, hash_entry);
return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
}
int originator_init(struct bat_priv *bat_priv)
{
if (bat_priv->orig_hash)
@ -137,6 +145,7 @@ static void orig_node_free_rcu(struct rcu_head *rcu)
tt_global_del_orig(orig_node->bat_priv, orig_node,
"originator timed out");
kfree(orig_node->tt_buff);
kfree(orig_node->bcast_own);
kfree(orig_node->bcast_own_sum);
kfree(orig_node);
@ -205,14 +214,18 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
spin_lock_init(&orig_node->ogm_cnt_lock);
spin_lock_init(&orig_node->bcast_seqno_lock);
spin_lock_init(&orig_node->neigh_list_lock);
spin_lock_init(&orig_node->tt_buff_lock);
/* extra reference for return */
atomic_set(&orig_node->refcount, 2);
orig_node->tt_poss_change = false;
orig_node->bat_priv = bat_priv;
memcpy(orig_node->orig, addr, ETH_ALEN);
orig_node->router = NULL;
orig_node->tt_buff = NULL;
orig_node->tt_buff_len = 0;
atomic_set(&orig_node->tt_size, 0);
orig_node->bcast_seqno_reset = jiffies - 1
- msecs_to_jiffies(RESET_PROTECTION_MS);
orig_node->batman_seqno_reset = jiffies - 1
@ -322,9 +335,7 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
if (purge_orig_neighbors(bat_priv, orig_node,
&best_neigh_node)) {
update_routes(bat_priv, orig_node,
best_neigh_node,
orig_node->tt_buff,
orig_node->tt_buff_len);
best_neigh_node);
}
}

8
net/batman-adv/originator.h
View File

@ -40,14 +40,6 @@ int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num);
int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num);
/* returns 1 if they are the same originator */
static inline int compare_orig(const struct hlist_node *node, const void *data2)
{
const void *data1 = container_of(node, struct orig_node, hash_entry);
return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
}
/* hashfunction to choose an entry in a hash table of given size */
/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
static inline int choose_orig(const void *data, int32_t size)

94
net/batman-adv/packet.h
View File

@ -30,11 +30,13 @@ enum bat_packettype {
BAT_UNICAST = 0x03,
BAT_BCAST = 0x04,
BAT_VIS = 0x05,
BAT_UNICAST_FRAG = 0x06
BAT_UNICAST_FRAG = 0x06,
BAT_TT_QUERY = 0x07,
BAT_ROAM_ADV = 0x08
};
/* this file is included by batctl which needs these defines */
#define COMPAT_VERSION 12
#define COMPAT_VERSION 14
enum batman_flags {
PRIMARIES_FIRST_HOP = 1 << 4,
@ -63,18 +65,38 @@ enum unicast_frag_flags {
UNI_FRAG_LARGETAIL = 1 << 1
};
/* TT_QUERY subtypes */
#define TT_QUERY_TYPE_MASK 0x3
enum tt_query_packettype {
TT_REQUEST = 0,
TT_RESPONSE = 1
};
/* TT_QUERY flags */
enum tt_query_flags {
TT_FULL_TABLE = 1 << 2
};
/* TT_CHANGE flags */
enum tt_change_flags {
TT_CHANGE_DEL = 0x01,
TT_CLIENT_ROAM = 0x02
};
struct batman_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
uint8_t tq;
uint32_t seqno;
uint8_t orig[6];
uint8_t prev_sender[6];
uint8_t ttl;
uint8_t num_tt;
uint8_t gw_flags; /* flags related to gateway class */
uint8_t align;
uint8_t tq;
uint8_t tt_num_changes;
uint8_t ttvn; /* translation table version number */
uint16_t tt_crc;
} __packed;
#define BAT_PACKET_LEN sizeof(struct batman_packet)
@ -82,12 +104,13 @@ struct batman_packet {
struct icmp_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
uint8_t uid;
uint8_t reserved;
} __packed;
#define BAT_RR_LEN 16
@ -97,8 +120,8 @@ struct icmp_packet {
struct icmp_packet_rr {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
@ -110,16 +133,19 @@ struct icmp_packet_rr {
struct unicast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t dest[6];
uint8_t ttl;
uint8_t ttvn; /* destination translation table version number */
uint8_t dest[6];
} __packed;
struct unicast_frag_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t dest[6];
uint8_t ttl;
uint8_t ttvn; /* destination translation table version number */
uint8_t dest[6];
uint8_t flags;
uint8_t align;
uint8_t orig[6];
uint16_t seqno;
} __packed;
@ -127,21 +153,61 @@ struct unicast_frag_packet {
struct bcast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t orig[6];
uint8_t ttl;
uint8_t reserved;
uint32_t seqno;
uint8_t orig[6];
} __packed;
struct vis_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t vis_type; /* which type of vis-participant sent this? */
uint8_t entries; /* number of entries behind this struct */
uint32_t seqno; /* sequence number */
uint8_t ttl; /* TTL */
uint8_t vis_type; /* which type of vis-participant sent this? */
uint32_t seqno; /* sequence number */
uint8_t entries; /* number of entries behind this struct */
uint8_t reserved;
uint8_t vis_orig[6]; /* originator that announces its neighbors */
uint8_t target_orig[6]; /* who should receive this packet */
uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
} __packed;
struct tt_query_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
/* the flag field is a combination of:
* - TT_REQUEST or TT_RESPONSE
* - TT_FULL_TABLE */
uint8_t flags;
uint8_t dst[ETH_ALEN];
uint8_t src[ETH_ALEN];
/* the ttvn field is:
* if TT_REQUEST: ttvn that triggered the
* request
* if TT_RESPONSE: new ttvn for the src
* orig_node */
uint8_t ttvn;
/* tt_data field is:
* if TT_REQUEST: crc associated with the
* ttvn
* if TT_RESPONSE: table_size */
uint16_t tt_data;
} __packed;
struct roam_adv_packet {
uint8_t packet_type;
uint8_t version;
uint8_t ttl;
uint8_t reserved;
uint8_t dst[ETH_ALEN];
uint8_t src[ETH_ALEN];
uint8_t client[ETH_ALEN];
} __packed;
struct tt_change {
uint8_t flags;
uint8_t addr[ETH_ALEN];
} __packed;
#endif /* _NET_BATMAN_ADV_PACKET_H_ */

313
net/batman-adv/routing.c
View File

@ -64,27 +64,57 @@ void slide_own_bcast_window(struct hard_iface *hard_iface)
}
}
static void update_TT(struct bat_priv *bat_priv, struct orig_node *orig_node,
const unsigned char *tt_buff, int tt_buff_len)
static void update_transtable(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const unsigned char *tt_buff,
uint8_t tt_num_changes, uint8_t ttvn,
uint16_t tt_crc)
{
if ((tt_buff_len != orig_node->tt_buff_len) ||
((tt_buff_len > 0) &&
(orig_node->tt_buff_len > 0) &&
(memcmp(orig_node->tt_buff, tt_buff, tt_buff_len) != 0))) {
uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
bool full_table = true;
if (orig_node->tt_buff_len > 0)
tt_global_del_orig(bat_priv, orig_node,
"originator changed tt");
/* the ttvn increased by one -> we can apply the attached changes */
if (ttvn - orig_ttvn == 1) {
/* the OGM could not contain the changes because they were too
* many to fit in one frame or because they have already been
* sent TT_OGM_APPEND_MAX times. In this case send a tt
* request */
if (!tt_num_changes) {
full_table = false;
goto request_table;
}
if ((tt_buff_len > 0) && (tt_buff))
tt_global_add_orig(bat_priv, orig_node,
tt_buff, tt_buff_len);
tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
(struct tt_change *)tt_buff);
/* Even if we received the crc into the OGM, we prefer
* to recompute it to spot any possible inconsistency
* in the global table */
orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
/* Roaming phase is over: tables are in sync again. I can
* unset the flag */
orig_node->tt_poss_change = false;
} else {
/* if we missed more than one change or our tables are not
* in sync anymore -> request fresh tt data */
if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
request_table:
bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
"Need to retrieve the correct information "
"(ttvn: %u last_ttvn: %u crc: %u last_crc: "
"%u num_changes: %u)\n", orig_node->orig, ttvn,
orig_ttvn, tt_crc, orig_node->tt_crc,
tt_num_changes);
send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
full_table);
return;
}
}
}
static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct neigh_node *neigh_node,
const unsigned char *tt_buff, int tt_buff_len)
static void update_route(struct bat_priv *bat_priv,
struct orig_node *orig_node,
struct neigh_node *neigh_node)
{
struct neigh_node *curr_router;
@ -92,11 +122,10 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
/* route deleted */
if ((curr_router) && (!neigh_node)) {
bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
orig_node->orig);
tt_global_del_orig(bat_priv, orig_node,
"originator timed out");
"Deleted route towards originator");
/* route added */
} else if ((!curr_router) && (neigh_node)) {
@ -104,9 +133,6 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
bat_dbg(DBG_ROUTES, bat_priv,
"Adding route towards: %pM (via %pM)\n",
orig_node->orig, neigh_node->addr);
tt_global_add_orig(bat_priv, orig_node,
tt_buff, tt_buff_len);
/* route changed */
} else if (neigh_node && curr_router) {
bat_dbg(DBG_ROUTES, bat_priv,
@ -133,8 +159,7 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
}
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct neigh_node *neigh_node, const unsigned char *tt_buff,
int tt_buff_len)
struct neigh_node *neigh_node)
{
struct neigh_node *router = NULL;
@ -144,11 +169,7 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
router = orig_node_get_router(orig_node);
if (router != neigh_node)
update_route(bat_priv, orig_node, neigh_node,
tt_buff, tt_buff_len);
/* may be just TT changed */
else
update_TT(bat_priv, orig_node, tt_buff, tt_buff_len);
update_route(bat_priv, orig_node, neigh_node);
out:
if (router)
@ -163,7 +184,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
struct hlist_node *node;
unsigned char total_count;
uint8_t total_count;
uint8_t orig_eq_count, neigh_rq_count, tq_own;
int tq_asym_penalty, ret = 0;
@ -360,14 +381,12 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
struct hard_iface *if_incoming,
const unsigned char *tt_buff, int tt_buff_len,
char is_duplicate)
const unsigned char *tt_buff, int is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *router = NULL;
struct orig_node *orig_node_tmp;
struct hlist_node *node;
int tmp_tt_buff_len;
uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
@ -432,9 +451,6 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
bonding_candidate_add(orig_node, neigh_node);
tmp_tt_buff_len = (tt_buff_len > batman_packet->num_tt * ETH_ALEN ?
batman_packet->num_tt * ETH_ALEN : tt_buff_len);
/* if this neighbor already is our next hop there is nothing
* to change */
router = orig_node_get_router(orig_node);
@ -464,15 +480,19 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
goto update_tt;
}
update_routes(bat_priv, orig_node, neigh_node,
tt_buff, tmp_tt_buff_len);
goto update_gw;
update_routes(bat_priv, orig_node, neigh_node);
update_tt:
update_routes(bat_priv, orig_node, router,
tt_buff, tmp_tt_buff_len);
/* I have to check for transtable changes only if the OGM has been
* sent through a primary interface */
if (((batman_packet->orig != ethhdr->h_source) &&
(batman_packet->ttl > 2)) ||
(batman_packet->flags & PRIMARIES_FIRST_HOP))
update_transtable(bat_priv, orig_node, tt_buff,
batman_packet->tt_num_changes,
batman_packet->ttvn,
batman_packet->tt_crc);
update_gw:
if (orig_node->gw_flags != batman_packet->gw_flags)
gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
@ -528,7 +548,7 @@ static int window_protected(struct bat_priv *bat_priv,
* -1 the packet is old and has been received while the seqno window
* was protected. Caller should drop it.
*/
static char count_real_packets(const struct ethhdr *ethhdr,
static int count_real_packets(const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
const struct hard_iface *if_incoming)
{
@ -536,7 +556,7 @@ static char count_real_packets(const struct ethhdr *ethhdr,
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
struct hlist_node *node;
char is_duplicate = 0;
int is_duplicate = 0;
int32_t seq_diff;
int need_update = 0;
int set_mark, ret = -1;
@ -594,7 +614,7 @@ out:
void receive_bat_packet(const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
const unsigned char *tt_buff, int tt_buff_len,
const unsigned char *tt_buff,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
@ -602,10 +622,10 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
struct orig_node *orig_neigh_node, *orig_node;
struct neigh_node *router = NULL, *router_router = NULL;
struct neigh_node *orig_neigh_router = NULL;
char has_directlink_flag;
char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
char is_duplicate;
int has_directlink_flag;
int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
int is_duplicate;
uint32_t if_incoming_seqno;
/* Silently drop when the batman packet is actually not a
@ -633,12 +653,14 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
bat_dbg(DBG_BATMAN, bat_priv,
"Received BATMAN packet via NB: %pM, IF: %s [%pM] "
"(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
"TTL %d, V %d, IDF %d)\n",
"(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, "
"crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->net_dev->name,
if_incoming->net_dev->dev_addr, batman_packet->orig,
batman_packet->prev_sender, batman_packet->seqno,
batman_packet->tq, batman_packet->ttl, batman_packet->version,
batman_packet->ttvn, batman_packet->tt_crc,
batman_packet->tt_num_changes, batman_packet->tq,
batman_packet->ttl, batman_packet->version,
has_directlink_flag);
rcu_read_lock();
@ -790,14 +812,14 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
((orig_node->last_real_seqno == batman_packet->seqno) &&
(orig_node->last_ttl - 3 <= batman_packet->ttl))))
update_orig(bat_priv, orig_node, ethhdr, batman_packet,
if_incoming, tt_buff, tt_buff_len, is_duplicate);
if_incoming, tt_buff, is_duplicate);
/* is single hop (direct) neighbor */
if (is_single_hop_neigh) {
/* mark direct link on incoming interface */
schedule_forward_packet(orig_node, ethhdr, batman_packet,
1, tt_buff_len, if_incoming);
1, if_incoming);
bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
"rebroadcast neighbor packet with direct link flag\n");
@ -820,7 +842,7 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: rebroadcast originator packet\n");
schedule_forward_packet(orig_node, ethhdr, batman_packet,
0, tt_buff_len, if_incoming);
0, if_incoming);
out_neigh:
if ((orig_neigh_node) && (!is_single_hop_neigh))
@ -1167,6 +1189,118 @@ static struct neigh_node *find_ifalter_router(struct orig_node *primary_orig,
return router;
}
int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
{
struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
struct tt_query_packet *tt_query;
struct ethhdr *ethhdr;
/* drop packet if it has not necessary minimum size */
if (unlikely(!pskb_may_pull(skb, sizeof(struct tt_query_packet))))
goto out;
/* I could need to modify it */
if (skb_cow(skb, sizeof(struct tt_query_packet)) < 0)
goto out;
ethhdr = (struct ethhdr *)skb_mac_header(skb);
/* packet with unicast indication but broadcast recipient */
if (is_broadcast_ether_addr(ethhdr->h_dest))
goto out;
/* packet with broadcast sender address */
if (is_broadcast_ether_addr(ethhdr->h_source))
goto out;
tt_query = (struct tt_query_packet *)skb->data;
tt_query->tt_data = ntohs(tt_query->tt_data);
switch (tt_query->flags & TT_QUERY_TYPE_MASK) {
case TT_REQUEST:
/* If we cannot provide an answer the tt_request is
* forwarded */
if (!send_tt_response(bat_priv, tt_query)) {
bat_dbg(DBG_TT, bat_priv,
"Routing TT_REQUEST to %pM [%c]\n",
tt_query->dst,
(tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
tt_query->tt_data = htons(tt_query->tt_data);
return route_unicast_packet(skb, recv_if);
}
break;
case TT_RESPONSE:
/* packet needs to be linearised to access the TT changes */
if (skb_linearize(skb) < 0)
goto out;
if (is_my_mac(tt_query->dst))
handle_tt_response(bat_priv, tt_query);
else {
bat_dbg(DBG_TT, bat_priv,
"Routing TT_RESPONSE to %pM [%c]\n",
tt_query->dst,
(tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
tt_query->tt_data = htons(tt_query->tt_data);
return route_unicast_packet(skb, recv_if);
}
break;
}
out:
/* returning NET_RX_DROP will make the caller function kfree the skb */
return NET_RX_DROP;
}
int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if)
{
struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
struct roam_adv_packet *roam_adv_packet;
struct orig_node *orig_node;
struct ethhdr *ethhdr;
/* drop packet if it has not necessary minimum size */
if (unlikely(!pskb_may_pull(skb, sizeof(struct roam_adv_packet))))
goto out;
ethhdr = (struct ethhdr *)skb_mac_header(skb);
/* packet with unicast indication but broadcast recipient */
if (is_broadcast_ether_addr(ethhdr->h_dest))
goto out;
/* packet with broadcast sender address */
if (is_broadcast_ether_addr(ethhdr->h_source))
goto out;
roam_adv_packet = (struct roam_adv_packet *)skb->data;
if (!is_my_mac(roam_adv_packet->dst))
return route_unicast_packet(skb, recv_if);
orig_node = orig_hash_find(bat_priv, roam_adv_packet->src);
if (!orig_node)
goto out;
bat_dbg(DBG_TT, bat_priv, "Received ROAMING_ADV from %pM "
"(client %pM)\n", roam_adv_packet->src,
roam_adv_packet->client);
tt_global_add(bat_priv, orig_node, roam_adv_packet->client,
atomic_read(&orig_node->last_ttvn) + 1, true);
/* Roaming phase starts: I have new information but the ttvn has not
* been incremented yet. This flag will make me check all the incoming
* packets for the correct destination. */
bat_priv->tt_poss_change = true;
orig_node_free_ref(orig_node);
out:
/* returning NET_RX_DROP will make the caller function kfree the skb */
return NET_RX_DROP;
}
/* find a suitable router for this originator, and use
* bonding if possible. increases the found neighbors
* refcount.*/
@ -1353,14 +1487,84 @@ out:
return ret;
}
static int check_unicast_ttvn(struct bat_priv *bat_priv,
struct sk_buff *skb) {
uint8_t curr_ttvn;
struct orig_node *orig_node;
struct ethhdr *ethhdr;
struct hard_iface *primary_if;
struct unicast_packet *unicast_packet;
bool tt_poss_change;
/* I could need to modify it */
if (skb_cow(skb, sizeof(struct unicast_packet)) < 0)
return 0;
unicast_packet = (struct unicast_packet *)skb->data;
if (is_my_mac(unicast_packet->dest)) {
tt_poss_change = bat_priv->tt_poss_change;
curr_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn);
} else {
orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
if (!orig_node)
return 0;
curr_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
tt_poss_change = orig_node->tt_poss_change;
orig_node_free_ref(orig_node);
}
/* Check whether I have to reroute the packet */
if (seq_before(unicast_packet->ttvn, curr_ttvn) || tt_poss_change) {
/* Linearize the skb before accessing it */
if (skb_linearize(skb) < 0)
return 0;
ethhdr = (struct ethhdr *)(skb->data +
sizeof(struct unicast_packet));
orig_node = transtable_search(bat_priv, ethhdr->h_dest);
if (!orig_node) {
if (!is_my_client(bat_priv, ethhdr->h_dest))
return 0;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if)
return 0;
memcpy(unicast_packet->dest,
primary_if->net_dev->dev_addr, ETH_ALEN);
hardif_free_ref(primary_if);
} else {
memcpy(unicast_packet->dest, orig_node->orig,
ETH_ALEN);
curr_ttvn = (uint8_t)
atomic_read(&orig_node->last_ttvn);
orig_node_free_ref(orig_node);
}
bat_dbg(DBG_ROUTES, bat_priv, "TTVN mismatch (old_ttvn %u "
"new_ttvn %u)! Rerouting unicast packet (for %pM) to "
"%pM\n", unicast_packet->ttvn, curr_ttvn,
ethhdr->h_dest, unicast_packet->dest);
unicast_packet->ttvn = curr_ttvn;
}
return 1;
}
int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
{
struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
struct unicast_packet *unicast_packet;
int hdr_size = sizeof(*unicast_packet);
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
if (!check_unicast_ttvn(bat_priv, skb))
return NET_RX_DROP;
unicast_packet = (struct unicast_packet *)skb->data;
/* packet for me */
@ -1383,6 +1587,9 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
if (!check_unicast_ttvn(bat_priv, skb))
return NET_RX_DROP;
unicast_packet = (struct unicast_frag_packet *)skb->data;
/* packet for me */

7
net/batman-adv/routing.h
View File

@ -25,11 +25,10 @@
void slide_own_bcast_window(struct hard_iface *hard_iface);
void receive_bat_packet(const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
const unsigned char *tt_buff, int tt_buff_len,
const unsigned char *tt_buff,
struct hard_iface *if_incoming);
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
struct neigh_node *neigh_node, const unsigned char *tt_buff,
int tt_buff_len);
struct neigh_node *neigh_node);
int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
@ -37,6 +36,8 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if);
struct neigh_node *find_router(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const struct hard_iface *recv_if);

92
net/batman-adv/send.c
View File

@ -120,7 +120,7 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
/* adjust all flags and log packets */
while (aggregated_packet(buff_pos,
forw_packet->packet_len,
batman_packet->num_tt)) {
batman_packet->tt_num_changes)) {
/* we might have aggregated direct link packets with an
* ordinary base packet */
@ -135,17 +135,17 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
"Forwarding"));
bat_dbg(DBG_BATMAN, bat_priv,
"%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
" IDF %s) on interface %s [%pM]\n",
" IDF %s, hvn %d) on interface %s [%pM]\n",
fwd_str, (packet_num > 0 ? "aggregated " : ""),
batman_packet->orig, ntohl(batman_packet->seqno),
batman_packet->tq, batman_packet->ttl,
(batman_packet->flags & DIRECTLINK ?
"on" : "off"),
hard_iface->net_dev->name,
batman_packet->ttvn, hard_iface->net_dev->name,
hard_iface->net_dev->dev_addr);
buff_pos += sizeof(*batman_packet) +
(batman_packet->num_tt * ETH_ALEN);
tt_len(batman_packet->tt_num_changes);
packet_num++;
batman_packet = (struct batman_packet *)
(forw_packet->skb->data + buff_pos);
@ -165,7 +165,7 @@ static void send_packet(struct forw_packet *forw_packet)
struct bat_priv *bat_priv;
struct batman_packet *batman_packet =
(struct batman_packet *)(forw_packet->skb->data);
unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
int directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
if (!forw_packet->if_incoming) {
pr_err("Error - can't forward packet: incoming iface not "
@ -213,25 +213,18 @@ static void send_packet(struct forw_packet *forw_packet)
rcu_read_unlock();
}
static void rebuild_batman_packet(struct bat_priv *bat_priv,
struct hard_iface *hard_iface)
static void realloc_packet_buffer(struct hard_iface *hard_iface,
int new_len)
{
int new_len;
unsigned char *new_buff;
struct batman_packet *batman_packet;
new_len = sizeof(*batman_packet) + (bat_priv->num_local_tt * ETH_ALEN);
new_buff = kmalloc(new_len, GFP_ATOMIC);
/* keep old buffer if kmalloc should fail */
if (new_buff) {
memcpy(new_buff, hard_iface->packet_buff,
sizeof(*batman_packet));
batman_packet = (struct batman_packet *)new_buff;
batman_packet->num_tt = tt_local_fill_buffer(bat_priv,
new_buff + sizeof(*batman_packet),
new_len - sizeof(*batman_packet));
kfree(hard_iface->packet_buff);
hard_iface->packet_buff = new_buff;
@ -239,6 +232,46 @@ static void rebuild_batman_packet(struct bat_priv *bat_priv,
}
}
/* when calling this function (hard_iface == primary_if) has to be true */
static void prepare_packet_buffer(struct bat_priv *bat_priv,
struct hard_iface *hard_iface)
{
int new_len;
struct batman_packet *batman_packet;
new_len = BAT_PACKET_LEN +
tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes));
/* if we have too many changes for one packet don't send any
* and wait for the tt table request which will be fragmented */
if (new_len > hard_iface->soft_iface->mtu)
new_len = BAT_PACKET_LEN;
realloc_packet_buffer(hard_iface, new_len);
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv));
/* reset the sending counter */
atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX);
batman_packet->tt_num_changes = tt_changes_fill_buffer(bat_priv,
hard_iface->packet_buff + BAT_PACKET_LEN,
hard_iface->packet_len - BAT_PACKET_LEN);
}
static void reset_packet_buffer(struct bat_priv *bat_priv,
struct hard_iface *hard_iface)
{
struct batman_packet *batman_packet;
realloc_packet_buffer(hard_iface, BAT_PACKET_LEN);
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
batman_packet->tt_num_changes = 0;
}
void schedule_own_packet(struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
@ -264,14 +297,23 @@ void schedule_own_packet(struct hard_iface *hard_iface)
if (hard_iface->if_status == IF_TO_BE_ACTIVATED)
hard_iface->if_status = IF_ACTIVE;
/* if local tt has changed and interface is a primary interface */
if ((atomic_read(&bat_priv->tt_local_changed)) &&
(hard_iface == primary_if))
rebuild_batman_packet(bat_priv, hard_iface);
if (hard_iface == primary_if) {
/* if at least one change happened */
if (atomic_read(&bat_priv->tt_local_changes) > 0) {
prepare_packet_buffer(bat_priv, hard_iface);
/* Increment the TTVN only once per OGM interval */
atomic_inc(&bat_priv->ttvn);
bat_priv->tt_poss_change = false;
}
/* if the changes have been sent enough times */
if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))
reset_packet_buffer(bat_priv, hard_iface);
}
/**
* NOTE: packet_buff might just have been re-allocated in
* rebuild_batman_packet()
* prepare_packet_buffer() or in reset_packet_buffer()
*/
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
@ -279,6 +321,9 @@ void schedule_own_packet(struct hard_iface *hard_iface)
batman_packet->seqno =
htonl((uint32_t)atomic_read(&hard_iface->seqno));
batman_packet->ttvn = atomic_read(&bat_priv->ttvn);
batman_packet->tt_crc = htons((uint16_t)atomic_read(&bat_priv->tt_crc));
if (vis_server == VIS_TYPE_SERVER_SYNC)
batman_packet->flags |= VIS_SERVER;
else
@ -307,13 +352,14 @@ void schedule_own_packet(struct hard_iface *hard_iface)
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
uint8_t directlink, int tt_buff_len,
int directlink,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *router;
unsigned char in_tq, in_ttl, tq_avg = 0;
uint8_t in_tq, in_ttl, tq_avg = 0;
unsigned long send_time;
uint8_t tt_num_changes;
if (batman_packet->ttl <= 1) {
bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
@ -324,6 +370,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
in_tq = batman_packet->tq;
in_ttl = batman_packet->ttl;
tt_num_changes = batman_packet->tt_num_changes;
batman_packet->ttl--;
memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
@ -356,6 +403,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
batman_packet->ttl);
batman_packet->seqno = htonl(batman_packet->seqno);
batman_packet->tt_crc = htons(batman_packet->tt_crc);
/* switch of primaries first hop flag when forwarding */
batman_packet->flags &= ~PRIMARIES_FIRST_HOP;
@ -367,7 +415,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
send_time = forward_send_time();
add_bat_packet_to_list(bat_priv,
(unsigned char *)batman_packet,
sizeof(*batman_packet) + tt_buff_len,
sizeof(*batman_packet) + tt_len(tt_num_changes),
if_incoming, 0, send_time);
}

2
net/batman-adv/send.h
View File

@ -28,7 +28,7 @@ void schedule_own_packet(struct hard_iface *hard_iface);
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
uint8_t directlink, int tt_buff_len,
int directlink,
struct hard_iface *if_outgoing);
int add_bcast_packet_to_list(struct bat_priv *bat_priv,
const struct sk_buff *skb);

26
net/batman-adv/soft-interface.c
View File

@ -30,6 +30,7 @@
#include "gateway_common.h"
#include "gateway_client.h"
#include "bat_sysfs.h"
#include "originator.h"
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
@ -380,7 +381,7 @@ void softif_neigh_purge(struct bat_priv *bat_priv)
struct softif_neigh *softif_neigh, *curr_softif_neigh;
struct softif_neigh_vid *softif_neigh_vid;
struct hlist_node *node, *node_tmp, *node_tmp2;
char do_deselect;
int do_deselect;
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh_vid, node,
@ -534,7 +535,7 @@ static int interface_set_mac_addr(struct net_device *dev, void *p)
/* only modify transtable if it has been initialised before */
if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
tt_local_remove(bat_priv, dev->dev_addr,
"mac address changed");
"mac address changed", false);
tt_local_add(dev, addr->sa_data);
}
@ -553,7 +554,7 @@ static int interface_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct bat_priv *bat_priv = netdev_priv(soft_iface);
@ -561,6 +562,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
struct bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
struct softif_neigh *curr_softif_neigh = NULL;
struct orig_node *orig_node = NULL;
int data_len = skb->len, ret;
short vid = -1;
bool do_bcast = false;
@ -592,11 +594,13 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
if (curr_softif_neigh)
goto dropped;
/* TODO: check this for locks */
/* Register the client MAC in the transtable */
tt_local_add(soft_iface, ethhdr->h_source);
if (is_multicast_ether_addr(ethhdr->h_dest)) {
ret = gw_is_target(bat_priv, skb);
orig_node = transtable_search(bat_priv, ethhdr->h_dest);
if (is_multicast_ether_addr(ethhdr->h_dest) ||
(orig_node && orig_node->gw_flags)) {
ret = gw_is_target(bat_priv, skb, orig_node);
if (ret < 0)
goto dropped;
@ -656,6 +660,8 @@ end:
softif_neigh_free_ref(curr_softif_neigh);
if (primary_if)
hardif_free_ref(primary_if);
if (orig_node)
orig_node_free_ref(orig_node);
return NETDEV_TX_OK;
}
@ -830,7 +836,13 @@ struct net_device *softif_create(const char *name)
atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
atomic_set(&bat_priv->bcast_seqno, 1);
atomic_set(&bat_priv->tt_local_changed, 0);
atomic_set(&bat_priv->ttvn, 0);
atomic_set(&bat_priv->tt_local_changes, 0);
atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
bat_priv->tt_buff = NULL;
bat_priv->tt_buff_len = 0;
bat_priv->tt_poss_change = false;
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;

1
net/batman-adv/soft-interface.h
View File

@ -25,7 +25,6 @@
int my_skb_head_push(struct sk_buff *skb, unsigned int len);
int softif_neigh_seq_print_text(struct seq_file *seq, void *offset);
void softif_neigh_purge(struct bat_priv *bat_priv);
int interface_tx(struct sk_buff *skb, struct net_device *soft_iface);
void interface_rx(struct net_device *soft_iface,
struct sk_buff *skb, struct hard_iface *recv_if,
int hdr_size);

1432
net/batman-adv/translation-table.c
View File

File diff suppressed because it is too large Load Diff

38
net/batman-adv/translation-table.h
View File

@ -22,23 +22,45 @@
#ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
#define _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
int tt_local_init(struct bat_priv *bat_priv);
int tt_len(int changes_num);
int tt_changes_fill_buffer(struct bat_priv *bat_priv,
unsigned char *buff, int buff_len);
int tt_init(struct bat_priv *bat_priv);
void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
void tt_local_remove(struct bat_priv *bat_priv,
const uint8_t *addr, const char *message);
int tt_local_fill_buffer(struct bat_priv *bat_priv,
unsigned char *buff, int buff_len);
const uint8_t *addr, const char *message, bool roaming);
int tt_local_seq_print_text(struct seq_file *seq, void *offset);
void tt_local_free(struct bat_priv *bat_priv);
int tt_global_init(struct bat_priv *bat_priv);
void tt_global_add_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const unsigned char *tt_buff, int tt_buff_len);
int tt_global_add(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
uint8_t ttvn, bool roaming);
int tt_global_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_del_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node, const char *message);
void tt_global_free(struct bat_priv *bat_priv);
struct orig_node *orig_node, const char *message);
void tt_global_del(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
const char *message, bool roaming);
struct orig_node *transtable_search(struct bat_priv *bat_priv,
const uint8_t *addr);
void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
const unsigned char *tt_buff, uint8_t tt_num_changes);
uint16_t tt_local_crc(struct bat_priv *bat_priv);
uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node);
void tt_free(struct bat_priv *bat_priv);
int send_tt_request(struct bat_priv *bat_priv,
struct orig_node *dst_orig_node, uint8_t hvn,
uint16_t tt_crc, bool full_table);
bool send_tt_response(struct bat_priv *bat_priv,
struct tt_query_packet *tt_request);
void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
uint16_t tt_num_changes, uint8_t ttvn,
struct tt_change *tt_change);
bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
void handle_tt_response(struct bat_priv *bat_priv,
struct tt_query_packet *tt_response);
void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
struct orig_node *orig_node);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */

64
net/batman-adv/types.h
View File

@ -75,8 +75,18 @@ struct orig_node {
unsigned long batman_seqno_reset;
uint8_t gw_flags;
uint8_t flags;
atomic_t last_ttvn; /* last seen translation table version number */
uint16_t tt_crc;
unsigned char *tt_buff;
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
atomic_t tt_size;
/* The tt_poss_change flag is used to detect an ongoing roaming phase.
* If true, then I sent a Roaming_adv to this orig_node and I have to
* inspect every packet directed to it to check whether it is still
* the true destination or not. This flag will be reset to false as
* soon as I receive a new TTVN from this orig_node */
bool tt_poss_change;
uint32_t last_real_seqno;
uint8_t last_ttl;
unsigned long bcast_bits[NUM_WORDS];
@ -94,6 +104,7 @@ struct orig_node {
spinlock_t ogm_cnt_lock;
/* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
spinlock_t bcast_seqno_lock;
spinlock_t tt_list_lock; /* protects tt_list */
atomic_t bond_candidates;
struct list_head bond_list;
};
@ -145,6 +156,15 @@ struct bat_priv {
atomic_t bcast_seqno;
atomic_t bcast_queue_left;
atomic_t batman_queue_left;
atomic_t ttvn; /* tranlation table version number */
atomic_t tt_ogm_append_cnt;
atomic_t tt_local_changes; /* changes registered in a OGM interval */
/* The tt_poss_change flag is used to detect an ongoing roaming phase.
* If true, then I received a Roaming_adv and I have to inspect every
* packet directed to me to check whether I am still the true
* destination or not. This flag will be reset to false as soon as I
* increase my TTVN */
bool tt_poss_change;
char num_ifaces;
struct debug_log *debug_log;
struct kobject *mesh_obj;
@ -153,26 +173,35 @@ struct bat_priv {
struct hlist_head forw_bcast_list;
struct hlist_head gw_list;
struct hlist_head softif_neigh_vids;
struct list_head tt_changes_list; /* tracks changes in a OGM int */
struct list_head vis_send_list;
struct hashtable_t *orig_hash;
struct hashtable_t *tt_local_hash;
struct hashtable_t *tt_global_hash;
struct list_head tt_req_list; /* list of pending tt_requests */
struct list_head tt_roam_list;
struct hashtable_t *vis_hash;
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects */
spinlock_t tt_lhash_lock; /* protects tt_local_hash */
spinlock_t tt_ghash_lock; /* protects tt_global_hash */
spinlock_t tt_changes_list_lock; /* protects tt_changes */
spinlock_t tt_req_list_lock; /* protects tt_req_list */
spinlock_t tt_roam_list_lock; /* protects tt_roam_list */
spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
spinlock_t vis_hash_lock; /* protects vis_hash */
spinlock_t vis_list_lock; /* protects vis_info::recv_list */
spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
spinlock_t softif_neigh_vid_lock; /* protects soft-interface vid list */
int16_t num_local_tt;
atomic_t tt_local_changed;
atomic_t num_local_tt;
/* Checksum of the local table, recomputed before sending a new OGM */
atomic_t tt_crc;
unsigned char *tt_buff;
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
struct delayed_work tt_work;
struct delayed_work orig_work;
struct delayed_work vis_work;
struct gw_node __rcu *curr_gw; /* rcu protected pointer */
atomic_t gw_reselect;
struct hard_iface __rcu *primary_if; /* rcu protected pointer */
struct vis_info *my_vis_info;
};
@ -196,13 +225,38 @@ struct tt_local_entry {
uint8_t addr[ETH_ALEN];
unsigned long last_seen;
char never_purge;
atomic_t refcount;
struct rcu_head rcu;
struct hlist_node hash_entry;
};
struct tt_global_entry {
uint8_t addr[ETH_ALEN];
struct orig_node *orig_node;
struct hlist_node hash_entry;
uint8_t ttvn;
uint8_t flags; /* only TT_GLOBAL_ROAM is used */
unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
atomic_t refcount;
struct rcu_head rcu;
struct hlist_node hash_entry; /* entry in the global table */
};
struct tt_change_node {
struct list_head list;
struct tt_change change;
};
struct tt_req_node {
uint8_t addr[ETH_ALEN];
unsigned long issued_at;
struct list_head list;
};
struct tt_roam_node {
uint8_t addr[ETH_ALEN];
atomic_t counter;
unsigned long first_time;
struct list_head list;
};
/**

3
net/batman-adv/unicast.c
View File

@ -325,6 +325,9 @@ find_router:
unicast_packet->ttl = TTL;
/* copy the destination for faster routing */
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
/* set the destination tt version number */
unicast_packet->ttvn =
(uint8_t)atomic_read(&orig_node->last_ttvn);
if (atomic_read(&bat_priv->fragmentation) &&
data_len + sizeof(*unicast_packet) >

13
net/batman-adv/vis.c
View File

@ -665,11 +665,12 @@ next:
hash = bat_priv->tt_local_hash;
spin_lock_bh(&bat_priv->tt_lhash_lock);
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
hlist_for_each_entry(tt_local_entry, node, head, hash_entry) {
rcu_read_lock();
hlist_for_each_entry_rcu(tt_local_entry, node, head,
hash_entry) {
entry = (struct vis_info_entry *)
skb_put(info->skb_packet,
sizeof(*entry));
@ -678,14 +679,12 @@ next:
entry->quality = 0; /* 0 means TT */
packet->entries++;
if (vis_packet_full(info)) {
spin_unlock_bh(&bat_priv->tt_lhash_lock);
return 0;
}
if (vis_packet_full(info))
goto unlock;
}
rcu_read_unlock();
}
spin_unlock_bh(&bat_priv->tt_lhash_lock);
return 0;
unlock: