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batman-adv: remove vis functionality

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This is replaced by a userspace program, we don't need this
functionality to bloat the kernel.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
This commit is contained in:
Simon Wunderlich 2013-04-25 11:57:42 +02:00 committed by Antonio Quartulli
parent 0035f97e65
commit 9f4980e68b
17 changed files with 3 additions and 1304 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Documentation/ABI/testing/sysfs-class-net-mesh
View File

@ -88,14 +88,3 @@ Contact: Marek Lindner <lindner_marek@yahoo.de>
Description:
Defines the routing procotol this mesh instance
uses to find the optimal paths through the mesh.
What: /sys/class/net/<mesh_iface>/mesh/vis_mode
Date: May 2010
Contact: Marek Lindner <lindner_marek@yahoo.de>
Description:
Each batman node only maintains information about its
own local neighborhood, therefore generating graphs
showing the topology of the entire mesh is not easily
feasible without having a central instance to collect
the local topologies from all nodes. This file allows
to activate the collecting (server) mode.

50
Documentation/networking/batman-adv.txt
View File

@ -69,8 +69,7 @@ folder:
# aggregated_ogms gw_bandwidth log_level
# ap_isolation gw_mode orig_interval
# bonding gw_sel_class routing_algo
# bridge_loop_avoidance hop_penalty vis_mode
# fragmentation
# bridge_loop_avoidance hop_penalty fragmentation
There is a special folder for debugging information:
@ -78,7 +77,7 @@ There is a special folder for debugging information:
# ls /sys/kernel/debug/batman_adv/bat0/
# bla_backbone_table log transtable_global
# bla_claim_table originators transtable_local
# gateways socket vis_data
# gateways socket
Some of the files contain all sort of status information regard-
ing the mesh network. For example, you can view the table of
@ -127,51 +126,6 @@ ously assigned to interfaces now used by batman advanced, e.g.
# ifconfig eth0 0.0.0.0
VISUALIZATION
-------------
If you want topology visualization, at least one mesh node must
be configured as VIS-server:
# echo "server" > /sys/class/net/bat0/mesh/vis_mode
Each node is either configured as "server" or as "client" (de-
fault: "client"). Clients send their topology data to the server
next to them, and server synchronize with other servers. If there
is no server configured (default) within the mesh, no topology
information will be transmitted. With these "synchronizing
servers", there can be 1 or more vis servers sharing the same (or
at least very similar) data.
When configured as server, you can get a topology snapshot of
your mesh:
# cat /sys/kernel/debug/batman_adv/bat0/vis_data
This raw output is intended to be easily parsable and convertable
with other tools. Have a look at the batctl README if you want a
vis output in dot or json format for instance and how those out-
puts could then be visualised in an image.
The raw format consists of comma separated values per entry where
each entry is giving information about a certain source inter-
face. Each entry can/has to have the following values:
-> "mac" - mac address of an originator's source interface
(each line begins with it)
-> "TQ mac value" - src mac's link quality towards mac address
of a neighbor originator's interface which
is being used for routing
-> "TT mac" - TT announced by source mac
-> "PRIMARY" - this is a primary interface
-> "SEC mac" - secondary mac address of source
(requires preceding PRIMARY)
The TQ value has a range from 4 to 255 with 255 being the best.
The TT entries are showing which hosts are connected to the mesh
via bat0 or being bridged into the mesh network. The PRIMARY/SEC
values are only applied on primary interfaces
LOGGING/DEBUGGING
-----------------

1
net/batman-adv/Makefile
View File

@ -38,4 +38,3 @@ batman-adv-y += soft-interface.o
batman-adv-y += sysfs.o
batman-adv-y += translation-table.o
batman-adv-y += unicast.o
batman-adv-y += vis.o

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

@ -687,11 +687,9 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
struct batadv_ogm_packet *batadv_ogm_packet;
struct batadv_hard_iface *primary_if;
int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len;
int vis_server;
uint32_t seqno;
uint16_t tvlv_len = 0;
vis_server = atomic_read(&bat_priv->vis_mode);
primary_if = batadv_primary_if_get_selected(bat_priv);
if (hard_iface == primary_if) {
@ -712,11 +710,6 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
batadv_ogm_packet->seqno = htonl(seqno);
atomic_inc(&hard_iface->bat_iv.ogm_seqno);
if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC)
batadv_ogm_packet->flags |= BATADV_VIS_SERVER;
else
batadv_ogm_packet->flags &= ~BATADV_VIS_SERVER;
batadv_iv_ogm_slide_own_bcast_window(hard_iface);
batadv_iv_ogm_queue_add(bat_priv, hard_iface->bat_iv.ogm_buff,
hard_iface->bat_iv.ogm_buff_len, hard_iface, 1,
@ -790,7 +783,6 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
rcu_read_unlock();
orig_node->flags = batadv_ogm_packet->flags;
neigh_node->last_seen = jiffies;
spin_lock_bh(&neigh_node->lq_update_lock);

9
net/batman-adv/debugfs.c
View File

@ -28,7 +28,6 @@
#include "gateway_common.h"
#include "gateway_client.h"
#include "soft-interface.h"
#include "vis.h"
#include "icmp_socket.h"
#include "bridge_loop_avoidance.h"
#include "distributed-arp-table.h"
@ -300,12 +299,6 @@ static int batadv_transtable_local_open(struct inode *inode, struct file *file)
return single_open(file, batadv_tt_local_seq_print_text, net_dev);
}
static int batadv_vis_data_open(struct inode *inode, struct file *file)
{
struct net_device *net_dev = (struct net_device *)inode->i_private;
return single_open(file, batadv_vis_seq_print_text, net_dev);
}
struct batadv_debuginfo {
struct attribute attr;
const struct file_operations fops;
@ -356,7 +349,6 @@ static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
#endif
static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
batadv_transtable_local_open);
static BATADV_DEBUGINFO(vis_data, S_IRUGO, batadv_vis_data_open);
#ifdef CONFIG_BATMAN_ADV_NC
static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
#endif
@ -373,7 +365,6 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
&batadv_debuginfo_dat_cache,
#endif
&batadv_debuginfo_transtable_local,
&batadv_debuginfo_vis_data,
#ifdef CONFIG_BATMAN_ADV_NC
&batadv_debuginfo_nc_nodes,
#endif

9
net/batman-adv/hard-interface.c
View File

@ -194,22 +194,13 @@ batadv_hardif_get_active(const struct net_device *soft_iface)
static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv,
struct batadv_hard_iface *oldif)
{
struct batadv_vis_packet *vis_packet;
struct batadv_hard_iface *primary_if;
struct sk_buff *skb;
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
batadv_dat_init_own_addr(bat_priv, primary_if);
skb = bat_priv->vis.my_info->skb_packet;
vis_packet = (struct batadv_vis_packet *)skb->data;
memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
memcpy(vis_packet->sender_orig,
primary_if->net_dev->dev_addr, ETH_ALEN);
batadv_bla_update_orig_address(bat_priv, primary_if, oldif);
out:
if (primary_if)

11
net/batman-adv/main.c
View File

@ -38,7 +38,6 @@
#include "distributed-arp-table.h"
#include "unicast.h"
#include "gateway_common.h"
#include "vis.h"
#include "hash.h"
#include "bat_algo.h"
#include "network-coding.h"
@ -112,8 +111,6 @@ int batadv_mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->tt.roam_list_lock);
spin_lock_init(&bat_priv->tt.last_changeset_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);
spin_lock_init(&bat_priv->tvlv.container_list_lock);
spin_lock_init(&bat_priv->tvlv.handler_list_lock);
@ -137,10 +134,6 @@ int batadv_mesh_init(struct net_device *soft_iface)
batadv_tt_local_add(soft_iface, soft_iface->dev_addr,
BATADV_NULL_IFINDEX);
ret = batadv_vis_init(bat_priv);
if (ret < 0)
goto err;
ret = batadv_bla_init(bat_priv);
if (ret < 0)
goto err;
@ -173,8 +166,6 @@ void batadv_mesh_free(struct net_device *soft_iface)
batadv_purge_outstanding_packets(bat_priv, NULL);
batadv_vis_quit(bat_priv);
batadv_gw_node_purge(bat_priv);
batadv_nc_mesh_free(bat_priv);
batadv_dat_free(bat_priv);
@ -412,8 +403,6 @@ static void batadv_recv_handler_init(void)
batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_ucast_frag_packet;
/* broadcast packet */
batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet;
/* vis packet */
batadv_rx_handler[BATADV_VIS] = batadv_recv_vis_packet;
/* unicast tvlv packet */
batadv_rx_handler[BATADV_UNICAST_TVLV] = batadv_recv_unicast_tvlv;
}

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

@ -86,8 +86,6 @@
/* numbers of originator to contact for any PUT/GET DHT operation */
#define BATADV_DAT_CANDIDATES_NUM 3
#define BATADV_VIS_INTERVAL 5000 /* 5 seconds */
/* how much worse secondary interfaces may be to be considered as bonding
* candidates
*/

21
net/batman-adv/packet.h
View File

@ -29,7 +29,6 @@ enum batadv_packettype {
BATADV_ICMP = 0x02,
BATADV_UNICAST = 0x03,
BATADV_BCAST = 0x04,
BATADV_VIS = 0x05,
BATADV_UNICAST_FRAG = 0x06,
BATADV_UNICAST_4ADDR = 0x09,
BATADV_CODED = 0x0a,
@ -56,7 +55,6 @@ enum batadv_subtype {
enum batadv_iv_flags {
BATADV_NOT_BEST_NEXT_HOP = BIT(3),
BATADV_PRIMARIES_FIRST_HOP = BIT(4),
BATADV_VIS_SERVER = BIT(5),
BATADV_DIRECTLINK = BIT(6),
};
@ -69,12 +67,6 @@ enum batadv_icmp_packettype {
BATADV_PARAMETER_PROBLEM = 12,
};
/* vis defines */
enum batadv_vis_packettype {
BATADV_VIS_TYPE_SERVER_SYNC = 0,
BATADV_VIS_TYPE_CLIENT_UPDATE = 1,
};
/* fragmentation defines */
enum batadv_unicast_frag_flags {
BATADV_UNI_FRAG_HEAD = BIT(0),
@ -161,7 +153,7 @@ struct batadv_header {
*/
struct batadv_ogm_packet {
struct batadv_header header;
uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
uint8_t flags; /* 0x40: DIRECTLINK flag ... */
__be32 seqno;
uint8_t orig[ETH_ALEN];
uint8_t prev_sender[ETH_ALEN];
@ -257,17 +249,6 @@ struct batadv_bcast_packet {
#pragma pack()
struct batadv_vis_packet {
struct batadv_header header;
uint8_t vis_type; /* which type of vis-participant sent this? */
__be32 seqno; /* sequence number */
uint8_t entries; /* number of entries behind this struct */
uint8_t reserved;
uint8_t vis_orig[ETH_ALEN]; /* originator reporting its neighbors */
uint8_t target_orig[ETH_ALEN]; /* who should receive this packet */
uint8_t sender_orig[ETH_ALEN]; /* who sent or forwarded this packet */
};
/**
* struct batadv_coded_packet - network coded packet
* @header: common batman packet header and ttl of first included packet

51
net/batman-adv/routing.c
View File

@ -25,7 +25,6 @@
#include "icmp_socket.h"
#include "translation-table.h"
#include "originator.h"
#include "vis.h"
#include "unicast.h"
#include "bridge_loop_avoidance.h"
#include "distributed-arp-table.h"
@ -1168,53 +1167,3 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
batadv_orig_node_free_ref(orig_node);
return ret;
}
int batadv_recv_vis_packet(struct sk_buff *skb,
struct batadv_hard_iface *recv_if)
{
struct batadv_vis_packet *vis_packet;
struct ethhdr *ethhdr;
struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface);
int hdr_size = sizeof(*vis_packet);
/* keep skb linear */
if (skb_linearize(skb) < 0)
return NET_RX_DROP;
if (unlikely(!pskb_may_pull(skb, hdr_size)))
return NET_RX_DROP;
vis_packet = (struct batadv_vis_packet *)skb->data;
ethhdr = eth_hdr(skb);
/* not for me */
if (!batadv_is_my_mac(bat_priv, ethhdr->h_dest))
return NET_RX_DROP;
/* ignore own packets */
if (batadv_is_my_mac(bat_priv, vis_packet->vis_orig))
return NET_RX_DROP;
if (batadv_is_my_mac(bat_priv, vis_packet->sender_orig))
return NET_RX_DROP;
switch (vis_packet->vis_type) {
case BATADV_VIS_TYPE_SERVER_SYNC:
batadv_receive_server_sync_packet(bat_priv, vis_packet,
skb_headlen(skb));
break;
case BATADV_VIS_TYPE_CLIENT_UPDATE:
batadv_receive_client_update_packet(bat_priv, vis_packet,
skb_headlen(skb));
break;
default: /* ignore unknown packet */
break;
}
/* We take a copy of the data in the packet, so we should
* always free the skbuf.
*/
return NET_RX_DROP;
}

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

@ -34,8 +34,6 @@ int batadv_recv_ucast_frag_packet(struct sk_buff *skb,
struct batadv_hard_iface *recv_if);
int batadv_recv_bcast_packet(struct sk_buff *skb,
struct batadv_hard_iface *recv_if);
int batadv_recv_vis_packet(struct sk_buff *skb,
struct batadv_hard_iface *recv_if);
int batadv_recv_tt_query(struct sk_buff *skb,
struct batadv_hard_iface *recv_if);
int batadv_recv_roam_adv(struct sk_buff *skb,

1
net/batman-adv/send.c
View File

@ -24,7 +24,6 @@
#include "translation-table.h"
#include "soft-interface.h"
#include "hard-interface.h"
#include "vis.h"
#include "gateway_common.h"
#include "originator.h"
#include "network-coding.h"

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

@ -469,7 +469,6 @@ static int batadv_softif_init_late(struct net_device *dev)
atomic_set(&bat_priv->distributed_arp_table, 1);
#endif
atomic_set(&bat_priv->ap_isolation, 0);
atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
atomic_set(&bat_priv->gw_sel_class, 20);
atomic_set(&bat_priv->gw.bandwidth_down, 100);

72
net/batman-adv/sysfs.c
View File

@ -26,7 +26,6 @@
#include "hard-interface.h"
#include "gateway_common.h"
#include "gateway_client.h"
#include "vis.h"
static struct net_device *batadv_kobj_to_netdev(struct kobject *obj)
{
@ -231,74 +230,6 @@ __batadv_store_uint_attr(const char *buff, size_t count,
return ret;
}
static ssize_t batadv_show_vis_mode(struct kobject *kobj,
struct attribute *attr, char *buff)
{
struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj);
int vis_mode = atomic_read(&bat_priv->vis_mode);
const char *mode;
if (vis_mode == BATADV_VIS_TYPE_CLIENT_UPDATE)
mode = "client";
else
mode = "server";
return sprintf(buff, "%s\n", mode);
}
static ssize_t batadv_store_vis_mode(struct kobject *kobj,
struct attribute *attr, char *buff,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
struct batadv_priv *bat_priv = netdev_priv(net_dev);
unsigned long val;
int ret, vis_mode_tmp = -1;
const char *old_mode, *new_mode;
ret = kstrtoul(buff, 10, &val);
if (((count == 2) && (!ret) &&
(val == BATADV_VIS_TYPE_CLIENT_UPDATE)) ||
(strncmp(buff, "client", 6) == 0) ||
(strncmp(buff, "off", 3) == 0))
vis_mode_tmp = BATADV_VIS_TYPE_CLIENT_UPDATE;
if (((count == 2) && (!ret) &&
(val == BATADV_VIS_TYPE_SERVER_SYNC)) ||
(strncmp(buff, "server", 6) == 0))
vis_mode_tmp = BATADV_VIS_TYPE_SERVER_SYNC;
if (vis_mode_tmp < 0) {
if (buff[count - 1] == '\n')
buff[count - 1] = '\0';
batadv_info(net_dev,
"Invalid parameter for 'vis mode' setting received: %s\n",
buff);
return -EINVAL;
}
if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
return count;
if (atomic_read(&bat_priv->vis_mode) == BATADV_VIS_TYPE_CLIENT_UPDATE)
old_mode = "client";
else
old_mode = "server";
if (vis_mode_tmp == BATADV_VIS_TYPE_CLIENT_UPDATE)
new_mode = "client";
else
new_mode = "server";
batadv_info(net_dev, "Changing vis mode from: %s to: %s\n", old_mode,
new_mode);
atomic_set(&bat_priv->vis_mode, (unsigned int)vis_mode_tmp);
return count;
}
static ssize_t batadv_show_bat_algo(struct kobject *kobj,
struct attribute *attr, char *buff)
{
@ -431,8 +362,6 @@ BATADV_ATTR_SIF_BOOL(distributed_arp_table, S_IRUGO | S_IWUSR,
#endif
BATADV_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
BATADV_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
static BATADV_ATTR(vis_mode, S_IRUGO | S_IWUSR, batadv_show_vis_mode,
batadv_store_vis_mode);
static BATADV_ATTR(routing_algo, S_IRUGO, batadv_show_bat_algo, NULL);
static BATADV_ATTR(gw_mode, S_IRUGO | S_IWUSR, batadv_show_gw_mode,
batadv_store_gw_mode);
@ -463,7 +392,6 @@ static struct batadv_attribute *batadv_mesh_attrs[] = {
#endif
&batadv_attr_fragmentation,
&batadv_attr_ap_isolation,
&batadv_attr_vis_mode,
&batadv_attr_routing_algo,
&batadv_attr_gw_mode,
&batadv_attr_orig_interval,

84
net/batman-adv/types.h
View File

@ -99,7 +99,6 @@ struct batadv_hard_iface {
* @last_seen: time when last packet from this node was received
* @bcast_seqno_reset: time when the broadcast seqno window was reset
* @batman_seqno_reset: time when the batman seqno window was reset
* @flags: for now only VIS_SERVER flag
* @capabilities: announced capabilities of this originator
* @last_ttvn: last seen translation table version number
* @tt_crc: CRC of the translation table
@ -147,7 +146,6 @@ struct batadv_orig_node {
unsigned long last_seen;
unsigned long bcast_seqno_reset;
unsigned long batman_seqno_reset;
uint8_t flags;
uint8_t capabilities;
atomic_t last_ttvn;
uint32_t tt_crc;
@ -461,24 +459,6 @@ struct batadv_priv_tvlv {
spinlock_t handler_list_lock; /* protects handler_list */
};
/**
* struct batadv_priv_vis - per mesh interface vis data
* @send_list: list of batadv_vis_info packets to sent
* @hash: hash table containing vis data from other nodes in the network
* @hash_lock: lock protecting the hash table
* @list_lock: lock protecting my_info::recv_list
* @work: work queue callback item for vis packet sending
* @my_info: holds this node's vis data sent on a regular basis
*/
struct batadv_priv_vis {
struct list_head send_list;
struct batadv_hashtable *hash;
spinlock_t hash_lock; /* protects hash */
spinlock_t list_lock; /* protects my_info::recv_list */
struct delayed_work work;
struct batadv_vis_info *my_info;
};
/**
* struct batadv_priv_dat - per mesh interface DAT private data
* @addr: node DAT address
@ -536,7 +516,6 @@ struct batadv_priv_nc {
* enabled
* @distributed_arp_table: bool indicating whether distributed ARP table is
* enabled
* @vis_mode: vis operation: client or server (see batadv_vis_packettype)
* @gw_mode: gateway operation: off, client or server (see batadv_gw_modes)
* @gw_sel_class: gateway selection class (applies if gw_mode client)
* @orig_interval: OGM broadcast interval in milliseconds
@ -563,7 +542,6 @@ struct batadv_priv_nc {
* @gw: gateway data
* @tt: translation table data
* @tvlv: type-version-length-value data
* @vis: vis data
* @dat: distributed arp table data
* @network_coding: bool indicating whether network coding is enabled
* @batadv_priv_nc: network coding data
@ -583,7 +561,6 @@ struct batadv_priv {
#ifdef CONFIG_BATMAN_ADV_DAT
atomic_t distributed_arp_table;
#endif
atomic_t vis_mode;
atomic_t gw_mode;
atomic_t gw_sel_class;
atomic_t orig_interval;
@ -615,7 +592,6 @@ struct batadv_priv {
struct batadv_priv_gw gw;
struct batadv_priv_tt tt;
struct batadv_priv_tvlv tvlv;
struct batadv_priv_vis vis;
#ifdef CONFIG_BATMAN_ADV_DAT
struct batadv_priv_dat dat;
#endif
@ -909,66 +885,6 @@ struct batadv_frag_packet_list_entry {
struct sk_buff *skb;
};
/**
* struct batadv_vis_info - local data for vis information
* @first_seen: timestamp used for purging stale vis info entries
* @recv_list: List of server-neighbors we have received this packet from. This
* packet should not be re-forward to them again. List elements are struct
* batadv_vis_recvlist_node
* @send_list: list of packets to be forwarded
* @refcount: number of contexts the object is used
* @hash_entry: hlist node for batadv_priv_vis::hash
* @bat_priv: pointer to soft_iface this orig node belongs to
* @skb_packet: contains the vis packet
*/
struct batadv_vis_info {
unsigned long first_seen;
struct list_head recv_list;
struct list_head send_list;
struct kref refcount;
struct hlist_node hash_entry;
struct batadv_priv *bat_priv;
struct sk_buff *skb_packet;
} __packed;
/**
* struct batadv_vis_info_entry - contains link information for vis
* @src: source MAC of the link, all zero for local TT entry
* @dst: destination MAC of the link, client mac address for local TT entry
* @quality: transmission quality of the link, or 0 for local TT entry
*/
struct batadv_vis_info_entry {
uint8_t src[ETH_ALEN];
uint8_t dest[ETH_ALEN];
uint8_t quality;
} __packed;
/**
* struct batadv_vis_recvlist_node - list entry for batadv_vis_info::recv_list
* @list: list node for batadv_vis_info::recv_list
* @mac: MAC address of the originator from where the vis_info was received
*/
struct batadv_vis_recvlist_node {
struct list_head list;
uint8_t mac[ETH_ALEN];
};
/**
* struct batadv_vis_if_list_entry - auxiliary data for vis data generation
* @addr: MAC address of the interface
* @primary: true if this interface is the primary interface
* @list: list node the interface list
*
* While scanning for vis-entries of a particular vis-originator
* this list collects its interfaces to create a subgraph/cluster
* out of them later
*/
struct batadv_vis_if_list_entry {
uint8_t addr[ETH_ALEN];
bool primary;
struct hlist_node list;
};
/**
* struct batadv_algo_ops - mesh algorithm callbacks
* @list: list node for the batadv_algo_list

938
net/batman-adv/vis.c
View File

@ -1,938 +0,0 @@
/* Copyright (C) 2008-2013 B.A.T.M.A.N. contributors:
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include "main.h"
#include "send.h"
#include "translation-table.h"
#include "vis.h"
#include "soft-interface.h"
#include "hard-interface.h"
#include "hash.h"
#include "originator.h"
#define BATADV_MAX_VIS_PACKET_SIZE 1000
/* hash class keys */
static struct lock_class_key batadv_vis_hash_lock_class_key;
/* free the info */
static void batadv_free_info(struct kref *ref)
{
struct batadv_vis_info *info;
struct batadv_priv *bat_priv;
struct batadv_vis_recvlist_node *entry, *tmp;
info = container_of(ref, struct batadv_vis_info, refcount);
bat_priv = info->bat_priv;
list_del_init(&info->send_list);
spin_lock_bh(&bat_priv->vis.list_lock);
list_for_each_entry_safe(entry, tmp, &info->recv_list, list) {
list_del(&entry->list);
kfree(entry);
}
spin_unlock_bh(&bat_priv->vis.list_lock);
kfree_skb(info->skb_packet);
kfree(info);
}
/* Compare two vis packets, used by the hashing algorithm */
static int batadv_vis_info_cmp(const struct hlist_node *node, const void *data2)
{
const struct batadv_vis_info *d1, *d2;
const struct batadv_vis_packet *p1, *p2;
d1 = container_of(node, struct batadv_vis_info, hash_entry);
d2 = data2;
p1 = (struct batadv_vis_packet *)d1->skb_packet->data;
p2 = (struct batadv_vis_packet *)d2->skb_packet->data;
return batadv_compare_eth(p1->vis_orig, p2->vis_orig);
}
/* hash function to choose an entry in a hash table of given size
* hash algorithm from http://en.wikipedia.org/wiki/Hash_table
*/
static uint32_t batadv_vis_info_choose(const void *data, uint32_t size)
{
const struct batadv_vis_info *vis_info = data;
const struct batadv_vis_packet *packet;
const unsigned char *key;
uint32_t hash = 0;
size_t i;
packet = (struct batadv_vis_packet *)vis_info->skb_packet->data;
key = packet->vis_orig;
for (i = 0; i < ETH_ALEN; i++) {
hash += key[i];
hash += (hash << 10);
hash ^= (hash >> 6);
}
hash += (hash << 3);
hash ^= (hash >> 11);
hash += (hash << 15);
return hash % size;
}
static struct batadv_vis_info *
batadv_vis_hash_find(struct batadv_priv *bat_priv, const void *data)
{
struct batadv_hashtable *hash = bat_priv->vis.hash;
struct hlist_head *head;
struct batadv_vis_info *vis_info, *vis_info_tmp = NULL;
uint32_t index;
if (!hash)
return NULL;
index = batadv_vis_info_choose(data, hash->size);
head = &hash->table[index];
rcu_read_lock();
hlist_for_each_entry_rcu(vis_info, head, hash_entry) {
if (!batadv_vis_info_cmp(&vis_info->hash_entry, data))
continue;
vis_info_tmp = vis_info;
break;
}
rcu_read_unlock();
return vis_info_tmp;
}
/* insert interface to the list of interfaces of one originator, if it
* does not already exist in the list
*/
static void batadv_vis_data_insert_interface(const uint8_t *interface,
struct hlist_head *if_list,
bool primary)
{
struct batadv_vis_if_list_entry *entry;
hlist_for_each_entry(entry, if_list, list) {
if (batadv_compare_eth(entry->addr, interface))
return;
}
/* it's a new address, add it to the list */
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
return;
memcpy(entry->addr, interface, ETH_ALEN);
entry->primary = primary;
hlist_add_head(&entry->list, if_list);
}
static void batadv_vis_data_read_prim_sec(struct seq_file *seq,
const struct hlist_head *if_list)
{
struct batadv_vis_if_list_entry *entry;
hlist_for_each_entry(entry, if_list, list) {
if (entry->primary)
seq_puts(seq, "PRIMARY, ");
else
seq_printf(seq, "SEC %pM, ", entry->addr);
}
}
/* read an entry */
static ssize_t
batadv_vis_data_read_entry(struct seq_file *seq,
const struct batadv_vis_info_entry *entry,
const uint8_t *src, bool primary)
{
if (primary && entry->quality == 0)
return seq_printf(seq, "TT %pM, ", entry->dest);
else if (batadv_compare_eth(entry->src, src))
return seq_printf(seq, "TQ %pM %d, ", entry->dest,
entry->quality);
return 0;
}
static void
batadv_vis_data_insert_interfaces(struct hlist_head *list,
struct batadv_vis_packet *packet,
struct batadv_vis_info_entry *entries)
{
int i;
for (i = 0; i < packet->entries; i++) {
if (entries[i].quality == 0)
continue;
if (batadv_compare_eth(entries[i].src, packet->vis_orig))
continue;
batadv_vis_data_insert_interface(entries[i].src, list, false);
}
}
static void batadv_vis_data_read_entries(struct seq_file *seq,
struct hlist_head *list,
struct batadv_vis_packet *packet,
struct batadv_vis_info_entry *entries)
{
int i;
struct batadv_vis_if_list_entry *entry;
hlist_for_each_entry(entry, list, list) {
seq_printf(seq, "%pM,", entry->addr);
for (i = 0; i < packet->entries; i++)
batadv_vis_data_read_entry(seq, &entries[i],
entry->addr, entry->primary);
/* add primary/secondary records */
if (batadv_compare_eth(entry->addr, packet->vis_orig))
batadv_vis_data_read_prim_sec(seq, list);
seq_puts(seq, "\n");
}
}
static void batadv_vis_seq_print_text_bucket(struct seq_file *seq,
const struct hlist_head *head)
{
struct batadv_vis_info *info;
struct batadv_vis_packet *packet;
uint8_t *entries_pos;
struct batadv_vis_info_entry *entries;
struct batadv_vis_if_list_entry *entry;
struct hlist_node *n;
HLIST_HEAD(vis_if_list);
hlist_for_each_entry_rcu(info, head, hash_entry) {
packet = (struct batadv_vis_packet *)info->skb_packet->data;
entries_pos = (uint8_t *)packet + sizeof(*packet);
entries = (struct batadv_vis_info_entry *)entries_pos;
batadv_vis_data_insert_interface(packet->vis_orig, &vis_if_list,
true);
batadv_vis_data_insert_interfaces(&vis_if_list, packet,
entries);
batadv_vis_data_read_entries(seq, &vis_if_list, packet,
entries);
hlist_for_each_entry_safe(entry, n, &vis_if_list, list) {
hlist_del(&entry->list);
kfree(entry);
}
}
}
int batadv_vis_seq_print_text(struct seq_file *seq, void *offset)
{
struct batadv_hard_iface *primary_if;
struct hlist_head *head;
struct net_device *net_dev = (struct net_device *)seq->private;
struct batadv_priv *bat_priv = netdev_priv(net_dev);
struct batadv_hashtable *hash = bat_priv->vis.hash;
uint32_t i;
int ret = 0;
int vis_server = atomic_read(&bat_priv->vis_mode);
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
if (vis_server == BATADV_VIS_TYPE_CLIENT_UPDATE)
goto out;
spin_lock_bh(&bat_priv->vis.hash_lock);
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
batadv_vis_seq_print_text_bucket(seq, head);
}
spin_unlock_bh(&bat_priv->vis.hash_lock);
out:
if (primary_if)
batadv_hardif_free_ref(primary_if);
return ret;
}
/* add the info packet to the send list, if it was not
* already linked in.
*/
static void batadv_send_list_add(struct batadv_priv *bat_priv,
struct batadv_vis_info *info)
{
if (list_empty(&info->send_list)) {
kref_get(&info->refcount);
list_add_tail(&info->send_list, &bat_priv->vis.send_list);
}
}
/* delete the info packet from the send list, if it was
* linked in.
*/
static void batadv_send_list_del(struct batadv_vis_info *info)
{
if (!list_empty(&info->send_list)) {
list_del_init(&info->send_list);
kref_put(&info->refcount, batadv_free_info);
}
}
/* tries to add one entry to the receive list. */
static void batadv_recv_list_add(struct batadv_priv *bat_priv,
struct list_head *recv_list, const char *mac)
{
struct batadv_vis_recvlist_node *entry;
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
return;
memcpy(entry->mac, mac, ETH_ALEN);
spin_lock_bh(&bat_priv->vis.list_lock);
list_add_tail(&entry->list, recv_list);
spin_unlock_bh(&bat_priv->vis.list_lock);
}
/* returns 1 if this mac is in the recv_list */
static int batadv_recv_list_is_in(struct batadv_priv *bat_priv,
const struct list_head *recv_list,
const char *mac)
{
const struct batadv_vis_recvlist_node *entry;
spin_lock_bh(&bat_priv->vis.list_lock);
list_for_each_entry(entry, recv_list, list) {
if (batadv_compare_eth(entry->mac, mac)) {
spin_unlock_bh(&bat_priv->vis.list_lock);
return 1;
}
}
spin_unlock_bh(&bat_priv->vis.list_lock);
return 0;
}
/* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old,
* broken.. ). vis hash must be locked outside. is_new is set when the packet
* is newer than old entries in the hash.
*/
static struct batadv_vis_info *
batadv_add_packet(struct batadv_priv *bat_priv,
struct batadv_vis_packet *vis_packet, int vis_info_len,
int *is_new, int make_broadcast)
{
struct batadv_vis_info *info, *old_info;
struct batadv_vis_packet *search_packet, *old_packet;
struct batadv_vis_info search_elem;
struct batadv_vis_packet *packet;
struct sk_buff *tmp_skb;
int hash_added;
size_t len;
size_t max_entries;
*is_new = 0;
/* sanity check */
if (!bat_priv->vis.hash)
return NULL;
/* see if the packet is already in vis_hash */
search_elem.skb_packet = dev_alloc_skb(sizeof(*search_packet));
if (!search_elem.skb_packet)
return NULL;
len = sizeof(*search_packet);
tmp_skb = search_elem.skb_packet;
search_packet = (struct batadv_vis_packet *)skb_put(tmp_skb, len);
memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
old_info = batadv_vis_hash_find(bat_priv, &search_elem);
kfree_skb(search_elem.skb_packet);
if (old_info) {
tmp_skb = old_info->skb_packet;
old_packet = (struct batadv_vis_packet *)tmp_skb->data;
if (!batadv_seq_after(ntohl(vis_packet->seqno),
ntohl(old_packet->seqno))) {
if (old_packet->seqno == vis_packet->seqno) {
batadv_recv_list_add(bat_priv,
&old_info->recv_list,
vis_packet->sender_orig);
return old_info;
} else {
/* newer packet is already in hash. */
return NULL;
}
}
/* remove old entry */
batadv_hash_remove(bat_priv->vis.hash, batadv_vis_info_cmp,
batadv_vis_info_choose, old_info);
batadv_send_list_del(old_info);
kref_put(&old_info->refcount, batadv_free_info);
}
info = kmalloc(sizeof(*info), GFP_ATOMIC);
if (!info)
return NULL;
len = sizeof(*packet) + vis_info_len;
info->skb_packet = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
if (!info->skb_packet) {
kfree(info);
return NULL;
}
info->skb_packet->priority = TC_PRIO_CONTROL;
skb_reserve(info->skb_packet, ETH_HLEN);
packet = (struct batadv_vis_packet *)skb_put(info->skb_packet, len);
kref_init(&info->refcount);
INIT_LIST_HEAD(&info->send_list);
INIT_LIST_HEAD(&info->recv_list);
info->first_seen = jiffies;
info->bat_priv = bat_priv;
memcpy(packet, vis_packet, len);
/* initialize and add new packet. */
*is_new = 1;
/* Make it a broadcast packet, if required */
if (make_broadcast)
memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN);
/* repair if entries is longer than packet. */
max_entries = vis_info_len / sizeof(struct batadv_vis_info_entry);
if (packet->entries > max_entries)
packet->entries = max_entries;
batadv_recv_list_add(bat_priv, &info->recv_list, packet->sender_orig);
/* try to add it */
hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp,
batadv_vis_info_choose, info,
&info->hash_entry);
if (hash_added != 0) {
/* did not work (for some reason) */
kref_put(&info->refcount, batadv_free_info);
info = NULL;
}
return info;
}
/* handle the server sync packet, forward if needed. */
void batadv_receive_server_sync_packet(struct batadv_priv *bat_priv,
struct batadv_vis_packet *vis_packet,
int vis_info_len)
{
struct batadv_vis_info *info;
int is_new, make_broadcast;
int vis_server = atomic_read(&bat_priv->vis_mode);
make_broadcast = (vis_server == BATADV_VIS_TYPE_SERVER_SYNC);
spin_lock_bh(&bat_priv->vis.hash_lock);
info = batadv_add_packet(bat_priv, vis_packet, vis_info_len,
&is_new, make_broadcast);
if (!info)
goto end;
/* only if we are server ourselves and packet is newer than the one in
* hash.
*/
if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC && is_new)
batadv_send_list_add(bat_priv, info);
end:
spin_unlock_bh(&bat_priv->vis.hash_lock);
}
/* handle an incoming client update packet and schedule forward if needed. */
void batadv_receive_client_update_packet(struct batadv_priv *bat_priv,
struct batadv_vis_packet *vis_packet,
int vis_info_len)
{
struct batadv_vis_info *info;
struct batadv_vis_packet *packet;
int is_new;
int vis_server = atomic_read(&bat_priv->vis_mode);
int are_target = 0;
/* clients shall not broadcast. */
if (is_broadcast_ether_addr(vis_packet->target_orig))
return;
/* Are we the target for this VIS packet? */
if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC &&
batadv_is_my_mac(bat_priv, vis_packet->target_orig))
are_target = 1;
spin_lock_bh(&bat_priv->vis.hash_lock);
info = batadv_add_packet(bat_priv, vis_packet, vis_info_len,
&is_new, are_target);
if (!info)
goto end;
/* note that outdated packets will be dropped at this point. */
packet = (struct batadv_vis_packet *)info->skb_packet->data;
/* send only if we're the target server or ... */
if (are_target && is_new) {
packet->vis_type = BATADV_VIS_TYPE_SERVER_SYNC; /* upgrade! */
batadv_send_list_add(bat_priv, info);
/* ... we're not the recipient (and thus need to forward). */
} else if (!batadv_is_my_mac(bat_priv, packet->target_orig)) {
batadv_send_list_add(bat_priv, info);
}
end:
spin_unlock_bh(&bat_priv->vis.hash_lock);
}
/* Walk the originators and find the VIS server with the best tq. Set the packet
* address to its address and return the best_tq.
*
* Must be called with the originator hash locked
*/
static int batadv_find_best_vis_server(struct batadv_priv *bat_priv,
struct batadv_vis_info *info)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
struct batadv_neigh_node *router;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_vis_packet *packet;
int best_tq = -1;
uint32_t i;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
router = batadv_orig_node_get_router(orig_node);
if (!router)
continue;
if ((orig_node->flags & BATADV_VIS_SERVER) &&
(router->tq_avg > best_tq)) {
best_tq = router->tq_avg;
memcpy(packet->target_orig, orig_node->orig,
ETH_ALEN);
}
batadv_neigh_node_free_ref(router);
}
rcu_read_unlock();
}
return best_tq;
}
/* Return true if the vis packet is full. */
static bool batadv_vis_packet_full(const struct batadv_vis_info *info)
{
const struct batadv_vis_packet *packet;
size_t num;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
num = BATADV_MAX_VIS_PACKET_SIZE / sizeof(struct batadv_vis_info_entry);
if (num < packet->entries + 1)
return true;
return false;
}
/* generates a packet of own vis data,
* returns 0 on success, -1 if no packet could be generated
*/
static int batadv_generate_vis_packet(struct batadv_priv *bat_priv)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_neigh_node *router;
struct batadv_vis_info *info = bat_priv->vis.my_info;
struct batadv_vis_packet *packet;
struct batadv_vis_info_entry *entry;
struct batadv_tt_common_entry *tt_common_entry;
uint8_t *packet_pos;
int best_tq = -1;
uint32_t i;
info->first_seen = jiffies;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
packet->vis_type = atomic_read(&bat_priv->vis_mode);
memcpy(packet->target_orig, batadv_broadcast_addr, ETH_ALEN);
packet->header.ttl = BATADV_TTL;
packet->seqno = htonl(ntohl(packet->seqno) + 1);
packet->entries = 0;
packet->reserved = 0;
skb_trim(info->skb_packet, sizeof(*packet));
if (packet->vis_type == BATADV_VIS_TYPE_CLIENT_UPDATE) {
best_tq = batadv_find_best_vis_server(bat_priv, info);
if (best_tq < 0)
return best_tq;
}
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
router = batadv_orig_node_get_router(orig_node);
if (!router)
continue;
if (!batadv_compare_eth(router->addr, orig_node->orig))
goto next;
if (router->if_incoming->if_status != BATADV_IF_ACTIVE)
goto next;
if (router->tq_avg < 1)
goto next;
/* fill one entry into buffer. */
packet_pos = skb_put(info->skb_packet, sizeof(*entry));
entry = (struct batadv_vis_info_entry *)packet_pos;
memcpy(entry->src,
router->if_incoming->net_dev->dev_addr,
ETH_ALEN);
memcpy(entry->dest, orig_node->orig, ETH_ALEN);
entry->quality = router->tq_avg;
packet->entries++;
next:
batadv_neigh_node_free_ref(router);
if (batadv_vis_packet_full(info))
goto unlock;
}
rcu_read_unlock();
}
hash = bat_priv->tt.local_hash;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
hlist_for_each_entry_rcu(tt_common_entry, head,
hash_entry) {
packet_pos = skb_put(info->skb_packet, sizeof(*entry));
entry = (struct batadv_vis_info_entry *)packet_pos;
memset(entry->src, 0, ETH_ALEN);
memcpy(entry->dest, tt_common_entry->addr, ETH_ALEN);
entry->quality = 0; /* 0 means TT */
packet->entries++;
if (batadv_vis_packet_full(info))
goto unlock;
}
rcu_read_unlock();
}
return 0;
unlock:
rcu_read_unlock();
return 0;
}
/* free old vis packets. Must be called with this vis_hash_lock
* held
*/
static void batadv_purge_vis_packets(struct batadv_priv *bat_priv)
{
uint32_t i;
struct batadv_hashtable *hash = bat_priv->vis.hash;
struct hlist_node *node_tmp;
struct hlist_head *head;
struct batadv_vis_info *info;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
hlist_for_each_entry_safe(info, node_tmp,
head, hash_entry) {
/* never purge own data. */
if (info == bat_priv->vis.my_info)
continue;
if (batadv_has_timed_out(info->first_seen,
BATADV_VIS_TIMEOUT)) {
hlist_del(&info->hash_entry);
batadv_send_list_del(info);
kref_put(&info->refcount, batadv_free_info);
}
}
}
}
static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv,
struct batadv_vis_info *info)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_vis_packet *packet;
struct sk_buff *skb;
uint32_t i, res;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
/* send to all routers in range. */
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
/* if it's a vis server and reachable, send it. */
if (!(orig_node->flags & BATADV_VIS_SERVER))
continue;
/* don't send it if we already received the packet from
* this node.
*/
if (batadv_recv_list_is_in(bat_priv, &info->recv_list,
orig_node->orig))
continue;
memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
if (!skb)
continue;
res = batadv_send_skb_to_orig(skb, orig_node, NULL);
if (res == NET_XMIT_DROP)
kfree_skb(skb);
}
rcu_read_unlock();
}
}
static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv,
struct batadv_vis_info *info)
{
struct batadv_orig_node *orig_node;
struct sk_buff *skb;
struct batadv_vis_packet *packet;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
orig_node = batadv_orig_hash_find(bat_priv, packet->target_orig);
if (!orig_node)
goto out;
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
if (!skb)
goto out;
if (batadv_send_skb_to_orig(skb, orig_node, NULL) == NET_XMIT_DROP)
kfree_skb(skb);
out:
if (orig_node)
batadv_orig_node_free_ref(orig_node);
}
/* only send one vis packet. called from batadv_send_vis_packets() */
static void batadv_send_vis_packet(struct batadv_priv *bat_priv,
struct batadv_vis_info *info)
{
struct batadv_hard_iface *primary_if;
struct batadv_vis_packet *packet;
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
goto out;
packet = (struct batadv_vis_packet *)info->skb_packet->data;
if (packet->header.ttl < 2) {
pr_debug("Error - can't send vis packet: ttl exceeded\n");
goto out;
}
memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
packet->header.ttl--;
if (is_broadcast_ether_addr(packet->target_orig))
batadv_broadcast_vis_packet(bat_priv, info);
else
batadv_unicast_vis_packet(bat_priv, info);
packet->header.ttl++; /* restore TTL */
out:
if (primary_if)
batadv_hardif_free_ref(primary_if);
}
/* called from timer; send (and maybe generate) vis packet. */
static void batadv_send_vis_packets(struct work_struct *work)
{
struct delayed_work *delayed_work;
struct batadv_priv *bat_priv;
struct batadv_priv_vis *priv_vis;
struct batadv_vis_info *info;
delayed_work = container_of(work, struct delayed_work, work);
priv_vis = container_of(delayed_work, struct batadv_priv_vis, work);
bat_priv = container_of(priv_vis, struct batadv_priv, vis);
spin_lock_bh(&bat_priv->vis.hash_lock);
batadv_purge_vis_packets(bat_priv);
if (batadv_generate_vis_packet(bat_priv) == 0) {
/* schedule if generation was successful */
batadv_send_list_add(bat_priv, bat_priv->vis.my_info);
}
while (!list_empty(&bat_priv->vis.send_list)) {
info = list_first_entry(&bat_priv->vis.send_list,
typeof(*info), send_list);
kref_get(&info->refcount);
spin_unlock_bh(&bat_priv->vis.hash_lock);
batadv_send_vis_packet(bat_priv, info);
spin_lock_bh(&bat_priv->vis.hash_lock);
batadv_send_list_del(info);
kref_put(&info->refcount, batadv_free_info);
}
spin_unlock_bh(&bat_priv->vis.hash_lock);
queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work,
msecs_to_jiffies(BATADV_VIS_INTERVAL));
}
/* init the vis server. this may only be called when if_list is already
* initialized (e.g. bat0 is initialized, interfaces have been added)
*/
int batadv_vis_init(struct batadv_priv *bat_priv)
{
struct batadv_vis_packet *packet;
int hash_added;
unsigned int len;
unsigned long first_seen;
struct sk_buff *tmp_skb;
if (bat_priv->vis.hash)
return 0;
spin_lock_bh(&bat_priv->vis.hash_lock);
bat_priv->vis.hash = batadv_hash_new(256);
if (!bat_priv->vis.hash) {
pr_err("Can't initialize vis_hash\n");
goto err;
}
batadv_hash_set_lock_class(bat_priv->vis.hash,
&batadv_vis_hash_lock_class_key);
bat_priv->vis.my_info = kmalloc(BATADV_MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
if (!bat_priv->vis.my_info)
goto err;
len = sizeof(*packet) + BATADV_MAX_VIS_PACKET_SIZE + ETH_HLEN;
bat_priv->vis.my_info->skb_packet = netdev_alloc_skb_ip_align(NULL,
len);
if (!bat_priv->vis.my_info->skb_packet)
goto free_info;
bat_priv->vis.my_info->skb_packet->priority = TC_PRIO_CONTROL;
skb_reserve(bat_priv->vis.my_info->skb_packet, ETH_HLEN);
tmp_skb = bat_priv->vis.my_info->skb_packet;
packet = (struct batadv_vis_packet *)skb_put(tmp_skb, sizeof(*packet));
/* prefill the vis info */
first_seen = jiffies - msecs_to_jiffies(BATADV_VIS_INTERVAL);
bat_priv->vis.my_info->first_seen = first_seen;
INIT_LIST_HEAD(&bat_priv->vis.my_info->recv_list);
INIT_LIST_HEAD(&bat_priv->vis.my_info->send_list);
kref_init(&bat_priv->vis.my_info->refcount);
bat_priv->vis.my_info->bat_priv = bat_priv;
packet->header.version = BATADV_COMPAT_VERSION;
packet->header.packet_type = BATADV_VIS;
packet->header.ttl = BATADV_TTL;
packet->seqno = 0;
packet->reserved = 0;
packet->entries = 0;
INIT_LIST_HEAD(&bat_priv->vis.send_list);
hash_added = batadv_hash_add(bat_priv->vis.hash, batadv_vis_info_cmp,
batadv_vis_info_choose,
bat_priv->vis.my_info,
&bat_priv->vis.my_info->hash_entry);
if (hash_added != 0) {
pr_err("Can't add own vis packet into hash\n");
/* not in hash, need to remove it manually. */
kref_put(&bat_priv->vis.my_info->refcount, batadv_free_info);
goto err;
}
spin_unlock_bh(&bat_priv->vis.hash_lock);
INIT_DELAYED_WORK(&bat_priv->vis.work, batadv_send_vis_packets);
queue_delayed_work(batadv_event_workqueue, &bat_priv->vis.work,
msecs_to_jiffies(BATADV_VIS_INTERVAL));
return 0;
free_info:
kfree(bat_priv->vis.my_info);
bat_priv->vis.my_info = NULL;
err:
spin_unlock_bh(&bat_priv->vis.hash_lock);
batadv_vis_quit(bat_priv);
return -ENOMEM;
}
/* Decrease the reference count on a hash item info */
static void batadv_free_info_ref(struct hlist_node *node, void *arg)
{
struct batadv_vis_info *info;
info = container_of(node, struct batadv_vis_info, hash_entry);
batadv_send_list_del(info);
kref_put(&info->refcount, batadv_free_info);
}
/* shutdown vis-server */
void batadv_vis_quit(struct batadv_priv *bat_priv)
{
if (!bat_priv->vis.hash)
return;
cancel_delayed_work_sync(&bat_priv->vis.work);
spin_lock_bh(&bat_priv->vis.hash_lock);
/* properly remove, kill timers ... */
batadv_hash_delete(bat_priv->vis.hash, batadv_free_info_ref, NULL);
bat_priv->vis.hash = NULL;
bat_priv->vis.my_info = NULL;
spin_unlock_bh(&bat_priv->vis.hash_lock);
}

36
net/batman-adv/vis.h
View File

@ -1,36 +0,0 @@
/* Copyright (C) 2008-2013 B.A.T.M.A.N. contributors:
*
* Simon Wunderlich, Marek Lindner
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#ifndef _NET_BATMAN_ADV_VIS_H_
#define _NET_BATMAN_ADV_VIS_H_
/* timeout of vis packets in milliseconds */
#define BATADV_VIS_TIMEOUT 200000
int batadv_vis_seq_print_text(struct seq_file *seq, void *offset);
void batadv_receive_server_sync_packet(struct batadv_priv *bat_priv,
struct batadv_vis_packet *vis_packet,
int vis_info_len);
void batadv_receive_client_update_packet(struct batadv_priv *bat_priv,
struct batadv_vis_packet *vis_packet,
int vis_info_len);
int batadv_vis_init(struct batadv_priv *bat_priv);
void batadv_vis_quit(struct batadv_priv *bat_priv);
#endif /* _NET_BATMAN_ADV_VIS_H_ */