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This feature patchset includes the following changes:

Browse Source 
- 6 patches adding functionality to detect a WiFi interface under
    other virtual interfaces, like VLANs. They introduce a cache for
    the detected the WiFi configuration to avoid RTNL locking in
    critical sections. Patches have been prepared by Marek Lindner
    and Sven Eckelmann
 
  - Enable automatic module loading for genl requests, by Sven Eckelmann
 
  - Fix a potential race condition on interface removal. This is not
    happening very often in practice, but requires bigger changes to fix,
    so we are sending this to net-next. By Linus Luessing
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Merge tag 'batadv-next-for-davem-20161119' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
This feature patchset includes the following changes:

 - 6 patches adding functionality to detect a WiFi interface under
   other virtual interfaces, like VLANs. They introduce a cache for
   the detected the WiFi configuration to avoid RTNL locking in
   critical sections. Patches have been prepared by Marek Lindner
   and Sven Eckelmann

 - Enable automatic module loading for genl requests, by Sven Eckelmann

 - Fix a potential race condition on interface removal. This is not
   happening very often in practice, but requires bigger changes to fix,
   so we are sending this to net-next. By Linus Luessing
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-11-19 11:13:05 -05:00
commit f463c99b20
9 changed files with 446 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
net/batman-adv/bat_iv_ogm.c
View File

@ -717,17 +717,10 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
if (direct_link)
forw_packet_aggr->direct_link_flags |= 1;
/* add new packet to packet list */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/* start timer for this packet */
INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work,
batadv_iv_send_outstanding_bat_ogm_packet);
queue_delayed_work(batadv_event_workqueue,
&forw_packet_aggr->delayed_work,
send_time - jiffies);
batadv_forw_packet_ogmv1_queue(bat_priv, forw_packet_aggr, send_time);
}
/* aggregate a new packet into the existing ogm packet */
@ -1272,7 +1265,7 @@ static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
*/
tq_iface_penalty = BATADV_TQ_MAX_VALUE;
if (if_outgoing && (if_incoming == if_outgoing) &&
batadv_is_wifi_netdev(if_outgoing->net_dev))
batadv_is_wifi_hardif(if_outgoing))
tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE,
bat_priv);
@ -1789,9 +1782,6 @@ static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work)
forw_packet = container_of(delayed_work, struct batadv_forw_packet,
delayed_work);
bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface);
spin_lock_bh(&bat_priv->forw_bat_list_lock);
hlist_del(&forw_packet->list);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) {
dropped = true;
@ -1813,7 +1803,10 @@ static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work)
batadv_iv_ogm_schedule(forw_packet->if_incoming);
out:
batadv_forw_packet_free(forw_packet, dropped);
/* do we get something for free()? */
if (batadv_forw_packet_steal(forw_packet,
&bat_priv->forw_bat_list_lock))
batadv_forw_packet_free(forw_packet, dropped);
}
static int batadv_iv_ogm_receive(struct sk_buff *skb,

41
net/batman-adv/bat_v_elp.c
View File

@ -75,6 +75,7 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
{
struct batadv_hard_iface *hard_iface = neigh->if_incoming;
struct ethtool_link_ksettings link_settings;
struct net_device *real_netdev;
struct station_info sinfo;
u32 throughput;
int ret;
@ -89,23 +90,27 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
/* if this is a wireless device, then ask its throughput through
* cfg80211 API
*/
if (batadv_is_wifi_netdev(hard_iface->net_dev)) {
if (hard_iface->net_dev->ieee80211_ptr) {
ret = cfg80211_get_station(hard_iface->net_dev,
neigh->addr, &sinfo);
if (ret == -ENOENT) {
/* Node is not associated anymore! It would be
* possible to delete this neighbor. For now set
* the throughput metric to 0.
*/
return 0;
}
if (!ret)
return sinfo.expected_throughput / 100;
}
if (batadv_is_wifi_hardif(hard_iface)) {
if (!batadv_is_cfg80211_hardif(hard_iface))
/* unsupported WiFi driver version */
goto default_throughput;
/* unsupported WiFi driver version */
goto default_throughput;
real_netdev = batadv_get_real_netdev(hard_iface->net_dev);
if (!real_netdev)
goto default_throughput;
ret = cfg80211_get_station(real_netdev, neigh->addr, &sinfo);
dev_put(real_netdev);
if (ret == -ENOENT) {
/* Node is not associated anymore! It would be
* possible to delete this neighbor. For now set
* the throughput metric to 0.
*/
return 0;
}
if (!ret)
return sinfo.expected_throughput / 100;
}
/* if not a wifi interface, check if this device provides data via
@ -187,7 +192,7 @@ batadv_v_elp_wifi_neigh_probe(struct batadv_hardif_neigh_node *neigh)
int elp_skb_len;
/* this probing routine is for Wifi neighbours only */
if (!batadv_is_wifi_netdev(hard_iface->net_dev))
if (!batadv_is_wifi_hardif(hard_iface))
return true;
/* probe the neighbor only if no unicast packets have been sent
@ -352,7 +357,7 @@ int batadv_v_elp_iface_enable(struct batadv_hard_iface *hard_iface)
/* warn the user (again) if there is no throughput data is available */
hard_iface->bat_v.flags &= ~BATADV_WARNING_DEFAULT;
if (batadv_is_wifi_netdev(hard_iface->net_dev))
if (batadv_is_wifi_hardif(hard_iface))
hard_iface->bat_v.flags &= ~BATADV_FULL_DUPLEX;
INIT_DELAYED_WORK(&hard_iface->bat_v.elp_wq,

173
net/batman-adv/hard-interface.c
View File

@ -92,8 +92,8 @@ out:
*
* Return: result of rtnl_link_ops->get_link_net or @fallback_net
*/
static const struct net *batadv_getlink_net(const struct net_device *netdev,
const struct net *fallback_net)
static struct net *batadv_getlink_net(const struct net_device *netdev,
struct net *fallback_net)
{
if (!netdev->rtnl_link_ops)
return fallback_net;
@ -116,9 +116,9 @@ static const struct net *batadv_getlink_net(const struct net_device *netdev,
* Return: true if the devices are each others parent, otherwise false
*/
static bool batadv_mutual_parents(const struct net_device *dev1,
const struct net *net1,
struct net *net1,
const struct net_device *dev2,
const struct net *net2)
struct net *net2)
{
int dev1_parent_iflink = dev_get_iflink(dev1);
int dev2_parent_iflink = dev_get_iflink(dev2);
@ -154,7 +154,7 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
{
struct net *net = dev_net(net_dev);
struct net_device *parent_dev;
const struct net *parent_net;
struct net *parent_net;
bool ret;
/* check if this is a batman-adv mesh interface */
@ -202,13 +202,77 @@ static bool batadv_is_valid_iface(const struct net_device *net_dev)
}
/**
* batadv_is_wifi_netdev - check if the given net_device struct is a wifi
* interface
* batadv_get_real_netdevice - check if the given netdev struct is a virtual
* interface on top of another 'real' interface
* @netdev: the device to check
*
* Callers must hold the rtnl semaphore. You may want batadv_get_real_netdev()
* instead of this.
*
* Return: the 'real' net device or the original net device and NULL in case
* of an error.
*/
static struct net_device *batadv_get_real_netdevice(struct net_device *netdev)
{
struct batadv_hard_iface *hard_iface = NULL;
struct net_device *real_netdev = NULL;
struct net *real_net;
struct net *net;
int ifindex;
ASSERT_RTNL();
if (!netdev)
return NULL;
if (netdev->ifindex == dev_get_iflink(netdev)) {
dev_hold(netdev);
return netdev;
}
hard_iface = batadv_hardif_get_by_netdev(netdev);
if (!hard_iface || !hard_iface->soft_iface)
goto out;
net = dev_net(hard_iface->soft_iface);
ifindex = dev_get_iflink(netdev);
real_net = batadv_getlink_net(netdev, net);
real_netdev = dev_get_by_index(real_net, ifindex);
out:
if (hard_iface)
batadv_hardif_put(hard_iface);
return real_netdev;
}
/**
* batadv_get_real_netdev - check if the given net_device struct is a virtual
* interface on top of another 'real' interface
* @net_device: the device to check
*
* Return: true if the net device is a 802.11 wireless device, false otherwise.
* Return: the 'real' net device or the original net device and NULL in case
* of an error.
*/
bool batadv_is_wifi_netdev(struct net_device *net_device)
struct net_device *batadv_get_real_netdev(struct net_device *net_device)
{
struct net_device *real_netdev;
rtnl_lock();
real_netdev = batadv_get_real_netdevice(net_device);
rtnl_unlock();
return real_netdev;
}
/**
* batadv_is_wext_netdev - check if the given net_device struct is a
* wext wifi interface
* @net_device: the device to check
*
* Return: true if the net device is a wext wireless device, false
* otherwise.
*/
static bool batadv_is_wext_netdev(struct net_device *net_device)
{
if (!net_device)
return false;
@ -221,6 +285,22 @@ bool batadv_is_wifi_netdev(struct net_device *net_device)
return true;
#endif
return false;
}
/**
* batadv_is_cfg80211_netdev - check if the given net_device struct is a
* cfg80211 wifi interface
* @net_device: the device to check
*
* Return: true if the net device is a cfg80211 wireless device, false
* otherwise.
*/
static bool batadv_is_cfg80211_netdev(struct net_device *net_device)
{
if (!net_device)
return false;
/* cfg80211 drivers have to set ieee80211_ptr */
if (net_device->ieee80211_ptr)
return true;
@ -228,6 +308,73 @@ bool batadv_is_wifi_netdev(struct net_device *net_device)
return false;
}
/**
* batadv_wifi_flags_evaluate - calculate wifi flags for net_device
* @net_device: the device to check
*
* Return: batadv_hard_iface_wifi_flags flags of the device
*/
static u32 batadv_wifi_flags_evaluate(struct net_device *net_device)
{
u32 wifi_flags = 0;
struct net_device *real_netdev;
if (batadv_is_wext_netdev(net_device))
wifi_flags |= BATADV_HARDIF_WIFI_WEXT_DIRECT;
if (batadv_is_cfg80211_netdev(net_device))
wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT;
real_netdev = batadv_get_real_netdevice(net_device);
if (!real_netdev)
return wifi_flags;
if (real_netdev == net_device)
goto out;
if (batadv_is_wext_netdev(real_netdev))
wifi_flags |= BATADV_HARDIF_WIFI_WEXT_INDIRECT;
if (batadv_is_cfg80211_netdev(real_netdev))
wifi_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT;
out:
dev_put(real_netdev);
return wifi_flags;
}
/**
* batadv_is_cfg80211_hardif - check if the given hardif is a cfg80211 wifi
* interface
* @hard_iface: the device to check
*
* Return: true if the net device is a cfg80211 wireless device, false
* otherwise.
*/
bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface)
{
u32 allowed_flags = 0;
allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT;
allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT;
return !!(hard_iface->wifi_flags & allowed_flags);
}
/**
* batadv_is_wifi_hardif - check if the given hardif is a wifi interface
* @hard_iface: the device to check
*
* Return: true if the net device is a 802.11 wireless device, false otherwise.
*/
bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface)
{
if (!hard_iface)
return false;
return hard_iface->wifi_flags != 0;
}
/**
* batadv_hardif_no_broadcast - check whether (re)broadcast is necessary
* @if_outgoing: the outgoing interface checked and considered for (re)broadcast
@ -748,7 +895,8 @@ batadv_hardif_add_interface(struct net_device *net_dev)
kref_init(&hard_iface->refcount);
hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT;
if (batadv_is_wifi_netdev(net_dev))
hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev);
if (batadv_is_wifi_hardif(hard_iface))
hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
batadv_v_hardif_init(hard_iface);
@ -857,6 +1005,11 @@ static int batadv_hard_if_event(struct notifier_block *this,
if (hard_iface == primary_if)
batadv_primary_if_update_addr(bat_priv, NULL);
break;
case NETDEV_CHANGEUPPER:
hard_iface->wifi_flags = batadv_wifi_flags_evaluate(net_dev);
if (batadv_is_wifi_hardif(hard_iface))
hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
break;
default:
break;
}

5
net/batman-adv/hard-interface.h
View File

@ -65,8 +65,9 @@ enum batadv_hard_if_cleanup {
extern struct notifier_block batadv_hard_if_notifier;
bool batadv_is_wifi_netdev(struct net_device *net_device);
bool batadv_is_wifi_iface(int ifindex);
struct net_device *batadv_get_real_netdev(struct net_device *net_device);
bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface);
bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
struct batadv_hard_iface*
batadv_hardif_get_by_netdev(const struct net_device *net_dev);
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,

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

@ -23,6 +23,7 @@
#include <linux/crc32c.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/genetlink.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/init.h>
@ -44,6 +45,7 @@
#include <linux/workqueue.h>
#include <net/dsfield.h>
#include <net/rtnetlink.h>
#include <uapi/linux/batman_adv.h>
#include "bat_algo.h"
#include "bat_iv_ogm.h"
@ -648,3 +650,4 @@ MODULE_DESCRIPTION(BATADV_DRIVER_DESC);
MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE);
MODULE_VERSION(BATADV_SOURCE_VERSION);
MODULE_ALIAS_RTNL_LINK("batadv");
MODULE_ALIAS_GENL_FAMILY(BATADV_NL_NAME);

285
net/batman-adv/send.c
View File

@ -19,6 +19,7 @@
#include "main.h"
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/byteorder/generic.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
@ -520,6 +521,8 @@ batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
if (if_outgoing)
kref_get(&if_outgoing->refcount);
INIT_HLIST_NODE(&forw_packet->list);
INIT_HLIST_NODE(&forw_packet->cleanup_list);
forw_packet->skb = NULL;
forw_packet->queue_left = queue_left;
forw_packet->if_incoming = if_incoming;
@ -535,19 +538,191 @@ err:
return NULL;
}
static void
_batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet,
unsigned long send_time)
/**
* batadv_forw_packet_was_stolen - check whether someone stole this packet
* @forw_packet: the forwarding packet to check
*
* This function checks whether the given forwarding packet was claimed by
* someone else for free().
*
* Return: True if someone stole it, false otherwise.
*/
static bool
batadv_forw_packet_was_stolen(struct batadv_forw_packet *forw_packet)
{
/* add new packet to packet list */
spin_lock_bh(&bat_priv->forw_bcast_list_lock);
hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list);
spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
return !hlist_unhashed(&forw_packet->cleanup_list);
}
/* start timer for this packet */
queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work,
send_time);
/**
* batadv_forw_packet_steal - claim a forw_packet for free()
* @forw_packet: the forwarding packet to steal
* @lock: a key to the store to steal from (e.g. forw_{bat,bcast}_list_lock)
*
* This function tries to steal a specific forw_packet from global
* visibility for the purpose of getting it for free(). That means
* the caller is *not* allowed to requeue it afterwards.
*
* Return: True if stealing was successful. False if someone else stole it
* before us.
*/
bool batadv_forw_packet_steal(struct batadv_forw_packet *forw_packet,
spinlock_t *lock)
{
/* did purging routine steal it earlier? */
spin_lock_bh(lock);
if (batadv_forw_packet_was_stolen(forw_packet)) {
spin_unlock_bh(lock);
return false;
}
hlist_del_init(&forw_packet->list);
/* Just to spot misuse of this function */
hlist_add_fake(&forw_packet->cleanup_list);
spin_unlock_bh(lock);
return true;
}
/**
* batadv_forw_packet_list_steal - claim a list of forward packets for free()
* @forw_list: the to be stolen forward packets
* @cleanup_list: a backup pointer, to be able to dispose the packet later
* @hard_iface: the interface to steal forward packets from
*
* This function claims responsibility to free any forw_packet queued on the
* given hard_iface. If hard_iface is NULL forwarding packets on all hard
* interfaces will be claimed.
*
* The packets are being moved from the forw_list to the cleanup_list and
* by that allows already running threads to notice the claiming.
*/
static void
batadv_forw_packet_list_steal(struct hlist_head *forw_list,
struct hlist_head *cleanup_list,
const struct batadv_hard_iface *hard_iface)
{
struct batadv_forw_packet *forw_packet;
struct hlist_node *safe_tmp_node;
hlist_for_each_entry_safe(forw_packet, safe_tmp_node,
forw_list, list) {
/* if purge_outstanding_packets() was called with an argument
* we delete only packets belonging to the given interface
*/
if (hard_iface &&
(forw_packet->if_incoming != hard_iface) &&
(forw_packet->if_outgoing != hard_iface))
continue;
hlist_del(&forw_packet->list);
hlist_add_head(&forw_packet->cleanup_list, cleanup_list);
}
}
/**
* batadv_forw_packet_list_free - free a list of forward packets
* @head: a list of to be freed forw_packets
*
* This function cancels the scheduling of any packet in the provided list,
* waits for any possibly running packet forwarding thread to finish and
* finally, safely frees this forward packet.
*
* This function might sleep.
*/
static void batadv_forw_packet_list_free(struct hlist_head *head)
{
struct batadv_forw_packet *forw_packet;
struct hlist_node *safe_tmp_node;
hlist_for_each_entry_safe(forw_packet, safe_tmp_node, head,
cleanup_list) {
cancel_delayed_work_sync(&forw_packet->delayed_work);
hlist_del(&forw_packet->cleanup_list);
batadv_forw_packet_free(forw_packet, true);
}
}
/**
* batadv_forw_packet_queue - try to queue a forwarding packet
* @forw_packet: the forwarding packet to queue
* @lock: a key to the store (e.g. forw_{bat,bcast}_list_lock)
* @head: the shelve to queue it on (e.g. forw_{bat,bcast}_list)
* @send_time: timestamp (jiffies) when the packet is to be sent
*
* This function tries to (re)queue a forwarding packet. Requeuing
* is prevented if the according interface is shutting down
* (e.g. if batadv_forw_packet_list_steal() was called for this
* packet earlier).
*
* Calling batadv_forw_packet_queue() after a call to
* batadv_forw_packet_steal() is forbidden!
*
* Caller needs to ensure that forw_packet->delayed_work was initialized.
*/
static void batadv_forw_packet_queue(struct batadv_forw_packet *forw_packet,
spinlock_t *lock, struct hlist_head *head,
unsigned long send_time)
{
spin_lock_bh(lock);
/* did purging routine steal it from us? */
if (batadv_forw_packet_was_stolen(forw_packet)) {
/* If you got it for free() without trouble, then
* don't get back into the queue after stealing...
*/
WARN_ONCE(hlist_fake(&forw_packet->cleanup_list),
"Requeuing after batadv_forw_packet_steal() not allowed!\n");
spin_unlock_bh(lock);
return;
}
hlist_del_init(&forw_packet->list);
hlist_add_head(&forw_packet->list, head);
queue_delayed_work(batadv_event_workqueue,
&forw_packet->delayed_work,
send_time - jiffies);
spin_unlock_bh(lock);
}
/**
* batadv_forw_packet_bcast_queue - try to queue a broadcast packet
* @bat_priv: the bat priv with all the soft interface information
* @forw_packet: the forwarding packet to queue
* @send_time: timestamp (jiffies) when the packet is to be sent
*
* This function tries to (re)queue a broadcast packet.
*
* Caller needs to ensure that forw_packet->delayed_work was initialized.
*/
static void
batadv_forw_packet_bcast_queue(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet,
unsigned long send_time)
{
batadv_forw_packet_queue(forw_packet, &bat_priv->forw_bcast_list_lock,
&bat_priv->forw_bcast_list, send_time);
}
/**
* batadv_forw_packet_ogmv1_queue - try to queue an OGMv1 packet
* @bat_priv: the bat priv with all the soft interface information
* @forw_packet: the forwarding packet to queue
* @send_time: timestamp (jiffies) when the packet is to be sent
*
* This function tries to (re)queue an OGMv1 packet.
*
* Caller needs to ensure that forw_packet->delayed_work was initialized.
*/
void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet,
unsigned long send_time)
{
batadv_forw_packet_queue(forw_packet, &bat_priv->forw_bat_list_lock,
&bat_priv->forw_bat_list, send_time);
}
/**
@ -600,7 +775,7 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
INIT_DELAYED_WORK(&forw_packet->delayed_work,
batadv_send_outstanding_bcast_packet);
_batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay);
batadv_forw_packet_bcast_queue(bat_priv, forw_packet, jiffies + delay);
return NETDEV_TX_OK;
err_packet_free:
@ -619,6 +794,7 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
struct sk_buff *skb1;
struct net_device *soft_iface;
struct batadv_priv *bat_priv;
unsigned long send_time = jiffies + msecs_to_jiffies(5);
bool dropped = false;
u8 *neigh_addr;
u8 *orig_neigh;
@ -630,10 +806,6 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
soft_iface = forw_packet->if_incoming->soft_iface;
bat_priv = netdev_priv(soft_iface);
spin_lock_bh(&bat_priv->forw_bcast_list_lock);
hlist_del(&forw_packet->list);
spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) {
dropped = true;
goto out;
@ -714,22 +886,34 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
/* if we still have some more bcasts to send */
if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) {
_batadv_add_bcast_packet_to_list(bat_priv, forw_packet,
msecs_to_jiffies(5));
batadv_forw_packet_bcast_queue(bat_priv, forw_packet,
send_time);
return;
}
out:
batadv_forw_packet_free(forw_packet, dropped);
/* do we get something for free()? */
if (batadv_forw_packet_steal(forw_packet,
&bat_priv->forw_bcast_list_lock))
batadv_forw_packet_free(forw_packet, dropped);
}
/**
* batadv_purge_outstanding_packets - stop/purge scheduled bcast/OGMv1 packets
* @bat_priv: the bat priv with all the soft interface information
* @hard_iface: the hard interface to cancel and purge bcast/ogm packets on
*
* This method cancels and purges any broadcast and OGMv1 packet on the given
* hard_iface. If hard_iface is NULL, broadcast and OGMv1 packets on all hard
* interfaces will be canceled and purged.
*
* This function might sleep.
*/
void
batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
const struct batadv_hard_iface *hard_iface)
{
struct batadv_forw_packet *forw_packet;
struct hlist_node *safe_tmp_node;
bool pending;
struct hlist_head head = HLIST_HEAD_INIT;
if (hard_iface)
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
@ -739,57 +923,18 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"purge_outstanding_packets()\n");
/* free bcast list */
/* claim bcast list for free() */
spin_lock_bh(&bat_priv->forw_bcast_list_lock);
hlist_for_each_entry_safe(forw_packet, safe_tmp_node,
&bat_priv->forw_bcast_list, list) {
/* if purge_outstanding_packets() was called with an argument
* we delete only packets belonging to the given interface
*/
if ((hard_iface) &&
(forw_packet->if_incoming != hard_iface) &&
(forw_packet->if_outgoing != hard_iface))
continue;
spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
/* batadv_send_outstanding_bcast_packet() will lock the list to
* delete the item from the list
*/
pending = cancel_delayed_work_sync(&forw_packet->delayed_work);
spin_lock_bh(&bat_priv->forw_bcast_list_lock);
if (pending) {
hlist_del(&forw_packet->list);
batadv_forw_packet_free(forw_packet, true);
}
}
batadv_forw_packet_list_steal(&bat_priv->forw_bcast_list, &head,
hard_iface);
spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
/* free batman packet list */
/* claim batman packet list for free() */
spin_lock_bh(&bat_priv->forw_bat_list_lock);
hlist_for_each_entry_safe(forw_packet, safe_tmp_node,
&bat_priv->forw_bat_list, list) {
/* if purge_outstanding_packets() was called with an argument
* we delete only packets belonging to the given interface
*/
if ((hard_iface) &&
(forw_packet->if_incoming != hard_iface) &&
(forw_packet->if_outgoing != hard_iface))
continue;
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/* send_outstanding_bat_packet() will lock the list to
* delete the item from the list
*/
pending = cancel_delayed_work_sync(&forw_packet->delayed_work);
spin_lock_bh(&bat_priv->forw_bat_list_lock);
if (pending) {
hlist_del(&forw_packet->list);
batadv_forw_packet_free(forw_packet, true);
}
}
batadv_forw_packet_list_steal(&bat_priv->forw_bat_list, &head,
hard_iface);
spin_unlock_bh(&bat_priv->forw_bat_list_lock);
/* then cancel or wait for packet workers to finish and free */
batadv_forw_packet_list_free(&head);
}

5
net/batman-adv/send.h
View File

@ -21,6 +21,7 @@
#include "main.h"
#include <linux/compiler.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include "packet.h"
@ -34,6 +35,10 @@ batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing,
atomic_t *queue_left,
struct batadv_priv *bat_priv);
bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l);
void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet,
unsigned long send_time);
int batadv_send_skb_to_orig(struct sk_buff *skb,
struct batadv_orig_node *orig_node,

10
net/batman-adv/translation-table.c
View File

@ -646,6 +646,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
struct net *net = dev_net(soft_iface);
struct batadv_softif_vlan *vlan;
struct net_device *in_dev = NULL;
struct batadv_hard_iface *in_hardif = NULL;
struct hlist_head *head;
struct batadv_tt_orig_list_entry *orig_entry;
int hash_added, table_size, packet_size_max;
@ -657,6 +658,9 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
if (ifindex != BATADV_NULL_IFINDEX)
in_dev = dev_get_by_index(net, ifindex);
if (in_dev)
in_hardif = batadv_hardif_get_by_netdev(in_dev);
tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
if (!is_multicast_ether_addr(addr))
@ -730,7 +734,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
*/
tt_local->common.flags = BATADV_TT_CLIENT_NEW;
tt_local->common.vid = vid;
if (batadv_is_wifi_netdev(in_dev))
if (batadv_is_wifi_hardif(in_hardif))
tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
kref_init(&tt_local->common.refcount);
tt_local->last_seen = jiffies;
@ -790,7 +794,7 @@ check_roaming:
*/
remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK;
if (batadv_is_wifi_netdev(in_dev))
if (batadv_is_wifi_hardif(in_hardif))
tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
else
tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI;
@ -814,6 +818,8 @@ check_roaming:
ret = true;
out:
if (in_hardif)
batadv_hardif_put(in_hardif);
if (in_dev)
dev_put(in_dev);
if (tt_local)

19
net/batman-adv/types.h
View File

@ -118,12 +118,28 @@ struct batadv_hard_iface_bat_v {
u8 flags;
};
/**
* enum batadv_hard_iface_wifi_flags - Flags describing the wifi configuration
* of a batadv_hard_iface
* @BATADV_HARDIF_WIFI_WEXT_DIRECT: it is a wext wifi device
* @BATADV_HARDIF_WIFI_CFG80211_DIRECT: it is a cfg80211 wifi device
* @BATADV_HARDIF_WIFI_WEXT_INDIRECT: link device is a wext wifi device
* @BATADV_HARDIF_WIFI_CFG80211_INDIRECT: link device is a cfg80211 wifi device
*/
enum batadv_hard_iface_wifi_flags {
BATADV_HARDIF_WIFI_WEXT_DIRECT = BIT(0),
BATADV_HARDIF_WIFI_CFG80211_DIRECT = BIT(1),
BATADV_HARDIF_WIFI_WEXT_INDIRECT = BIT(2),
BATADV_HARDIF_WIFI_CFG80211_INDIRECT = BIT(3),
};
/**
* struct batadv_hard_iface - network device known to batman-adv
* @list: list node for batadv_hardif_list
* @if_num: identificator of the interface
* @if_status: status of the interface for batman-adv
* @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
* @wifi_flags: flags whether this is (directly or indirectly) a wifi interface
* @net_dev: pointer to the net_device
* @hardif_obj: kobject of the per interface sysfs "mesh" directory
* @refcount: number of contexts the object is used
@ -142,6 +158,7 @@ struct batadv_hard_iface {
s16 if_num;
char if_status;
u8 num_bcasts;
u32 wifi_flags;
struct net_device *net_dev;
struct kobject *hardif_obj;
struct kref refcount;
@ -1368,6 +1385,7 @@ struct batadv_skb_cb {
/**
* struct batadv_forw_packet - structure for bcast packets to be sent/forwarded
* @list: list node for batadv_priv::forw_{bat,bcast}_list
* @cleanup_list: list node for purging functions
* @send_time: execution time for delayed_work (packet sending)
* @own: bool for locally generated packets (local OGMs are re-scheduled after
* sending)
@ -1384,6 +1402,7 @@ struct batadv_skb_cb {
*/
struct batadv_forw_packet {
struct hlist_node list;
struct hlist_node cleanup_list;
unsigned long send_time;
u8 own;
struct sk_buff *skb;