diff options
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 21 | ||||
| -rw-r--r-- | net/batman-adv/bat_v_elp.c | 41 | ||||
| -rw-r--r-- | net/batman-adv/hard-interface.c | 173 | ||||
| -rw-r--r-- | net/batman-adv/hard-interface.h | 5 | ||||
| -rw-r--r-- | net/batman-adv/main.c | 3 | ||||
| -rw-r--r-- | net/batman-adv/send.c | 283 | ||||
| -rw-r--r-- | net/batman-adv/send.h | 5 | ||||
| -rw-r--r-- | net/batman-adv/translation-table.c | 10 | ||||
| -rw-r--r-- | net/batman-adv/types.h | 19 |
9 files changed, 445 insertions, 115 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index bd39247e2f0f..f00f666e2ccd 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -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, diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c index 54bdd415e8df..f2fb2f05b6bf 100644 --- a/net/batman-adv/bat_v_elp.c +++ b/net/batman-adv/bat_v_elp.c @@ -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; + + 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; } - - /* unsupported WiFi driver version */ - goto default_throughput; + 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, diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index dc1816e9d53b..672150b42c61 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -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; @@ -229,6 +309,73 @@ bool batadv_is_wifi_netdev(struct net_device *net_device) } /** + * 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 * @orig_addr: the originator of this packet @@ -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; } diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h index a043182586e9..d6309a423629 100644 --- a/net/batman-adv/hard-interface.h +++ b/net/batman-adv/hard-interface.h @@ -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, diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 6b5dae6f0307..d46415edd3be 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -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); diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 9ea272ef6612..49021b7124f3 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -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; } +/** + * 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) +{ + return !hlist_unhashed(&forw_packet->cleanup_list); +} + +/** + * 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_add_bcast_packet_to_list(struct batadv_priv *bat_priv, - struct batadv_forw_packet *forw_packet, - unsigned long send_time) +batadv_forw_packet_list_steal(struct hlist_head *forw_list, + struct hlist_head *cleanup_list, + const struct batadv_hard_iface *hard_iface) { - /* 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); + 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); - /* start timer for this packet */ - queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, - send_time); + 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); } diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h index c58019475025..a94e1e8639ca 100644 --- a/net/batman-adv/send.h +++ b/net/batman-adv/send.h @@ -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, diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 3cae8f4fd717..447f9490b692 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -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) diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 98ebac05c571..e913aee28c98 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -119,11 +119,27 @@ struct batadv_hard_iface_bat_v { }; /** + * 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; |