* [B.A.T.M.A.N.] [PATCHv2 1/6] batman-adv: remove vis functionality
2013-04-19 19:52 [B.A.T.M.A.N.] [PATCHv2 0/6] compat bump work Simon Wunderlich
@ 2013-04-19 19:52 ` Simon Wunderlich
2013-04-19 19:52 ` [B.A.T.M.A.N.] [PATCHv2 2/6] batman-adv: add build check macros for packet member offset Simon Wunderlich
` (4 subsequent siblings)
5 siblings, 0 replies; 11+ messages in thread
From: Simon Wunderlich @ 2013-04-19 19:52 UTC (permalink / raw)
To: b.a.t.m.a.n; +Cc: Simon Wunderlich
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>
---
Makefile.kbuild | 1 -
bat_iv_ogm.c | 7 -
debugfs.c | 9 -
hard-interface.c | 9 -
main.c | 11 -
packet.h | 17 -
routing.c | 51 ---
send.c | 1 -
soft-interface.c | 1 -
sysfs.c | 72 -----
types.h | 82 -----
vis.c | 935 ------------------------------------------------------
vis.h | 36 ---
13 files changed, 1232 deletions(-)
delete mode 100644 vis.c
delete mode 100644 vis.h
diff --git a/Makefile.kbuild b/Makefile.kbuild
index 489bb36..8ddbfe6 100644
--- a/Makefile.kbuild
+++ b/Makefile.kbuild
@@ -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
diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c
index 2acebad..d6f31ec 100644
--- a/bat_iv_ogm.c
+++ b/bat_iv_ogm.c
@@ -671,11 +671,9 @@ 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) {
@@ -696,11 +694,6 @@ 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,
diff --git a/debugfs.c b/debugfs.c
index f186a55..049a7a2 100644
--- a/debugfs.c
+++ b/debugfs.c
@@ -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
diff --git a/hard-interface.c b/hard-interface.c
index dc4ac29..9746600 100644
--- a/hard-interface.c
+++ b/hard-interface.c
@@ -194,22 +194,13 @@ out:
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)
diff --git a/main.c b/main.c
index 2bf3f4e..a003067 100644
--- a/main.c
+++ b/main.c
@@ -34,7 +34,6 @@
#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"
@@ -107,8 +106,6 @@ 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);
@@ -132,10 +129,6 @@ 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;
@@ -170,8 +163,6 @@ 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_originator_free(bat_priv);
batadv_nc_free(bat_priv);
@@ -347,8 +338,6 @@ 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;
}
diff --git a/packet.h b/packet.h
index 5856994..8ec9cf7 100644
--- a/packet.h
+++ b/packet.h
@@ -69,12 +69,6 @@ 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),
@@ -257,17 +251,6 @@ 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
diff --git a/routing.c b/routing.c
index 7e1521b..d48f9f9 100644
--- a/routing.c
+++ b/routing.c
@@ -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"
@@ -1148,53 +1147,3 @@ out:
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;
-}
diff --git a/send.c b/send.c
index ed7072a..f6476f1 100644
--- a/send.c
+++ b/send.c
@@ -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"
diff --git a/soft-interface.c b/soft-interface.c
index b26a6cd..eee53fd 100644
--- a/soft-interface.c
+++ b/soft-interface.c
@@ -458,7 +458,6 @@ 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, 41);
diff --git a/sysfs.c b/sysfs.c
index 109a0d8..88f3c73 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -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)
{
@@ -429,8 +360,6 @@ 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);
@@ -461,7 +390,6 @@ 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,
diff --git a/types.h b/types.h
index 0c77d67..04462ab 100644
--- a/types.h
+++ b/types.h
@@ -456,24 +456,6 @@ struct batadv_priv_tvlv {
};
/**
- * 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
* @hash: hashtable representing the local ARP cache
@@ -530,7 +512,6 @@ 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)
* @gw_bandwidth: gateway announced bandwidth (applies if gw_mode server)
@@ -558,7 +539,6 @@ 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
@@ -578,7 +558,6 @@ 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 gw_bandwidth;
@@ -611,7 +590,6 @@ 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
@@ -906,66 +884,6 @@ struct batadv_frag_packet_list_entry {
};
/**
- * 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
* @name: name of the algorithm
diff --git a/vis.c b/vis.c
deleted file mode 100644
index 94eaeb5..0000000
--- a/vis.c
+++ /dev/null
@@ -1,935 +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;
- }
- 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;
-
-
- 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;
-
- if (!batadv_send_skb_to_orig(skb, orig_node, NULL))
- 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))
- 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;
-
- 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);
-}
diff --git a/vis.h b/vis.h
deleted file mode 100644
index ad92b0e..0000000
--- a/vis.h
+++ /dev/null
@@ -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_ */
--
1.7.10.4
^ permalink raw reply related [flat|nested] 11+ messages in thread