B.A.T.M.A.N May 2016

b.a.t.m.a.n@lists.open-mesh.org

29 participants
110 discussions

[B.A.T.M.A.N.] [PATCH v4 0/6] GW code: make it algorithm-agnostic and add B.A.T.M.A.N. V support
by Antonio Quartulli 07 Jun '16

07 Jun '16

This cover letter only tries to recap the changes applied from the previous version. Please check the patch for major details. Changes from v1: - rebased on top of latest master (some patches from the previous patchset were merged already) - accidental change to the GW table header moved to right patch - remove bat_ prefix from API names - API subobjects redefined as proper struct instead of anonymous ones to fix kernel-doc complaints - bonus kernel-doc added - missing include files added Changes from v2: - minimum default value of gw_sel_class restored to 1 Changes from v3: - move "batman-adv: split routing API data structure in subobjects" as patch 1 - check if algo_ops->gw.get_best_gw_node was implemented before calling it - add patch to disable GW mode knobs if API have not been implemented (6/6) Cheers, Antonio Quartulli (6): batman-adv: split routing API data structure in subobjects batman-adv: make the GW selection class algorithm specific batman-adv: statically print gateway table header batman-adv: make GW election code protocol specific batman-adv: B.A.T.M.A.N. V - implement GW selection logic batman-adv: disable sysfs knobs when GW-mode is not implemented net/batman-adv/bat_algo.c | 14 +- net/batman-adv/bat_iv_ogm.c | 252 +++++++++++++++++++++++++++++++-- net/batman-adv/bat_v.c | 280 +++++++++++++++++++++++++++++++++++-- net/batman-adv/bat_v_elp.c | 2 +- net/batman-adv/bat_v_ogm.c | 2 +- net/batman-adv/gateway_client.c | 223 ++++------------------------- net/batman-adv/gateway_client.h | 7 + net/batman-adv/gateway_common.c | 5 +- net/batman-adv/hard-interface.c | 16 +-- net/batman-adv/netlink.c | 2 +- net/batman-adv/originator.c | 49 +++---- net/batman-adv/routing.c | 8 +- net/batman-adv/sysfs.c | 64 ++++++++- net/batman-adv/translation-table.c | 6 +- net/batman-adv/types.h | 137 +++++++++++------- 15 files changed, 744 insertions(+), 323 deletions(-) -- 2.8.3

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[B.A.T.M.A.N.] [PATCH v4] batman-adv: B.A.T.M.A.N. V - implement hard-iface init function
by Antonio Quartulli 07 Jun '16

07 Jun '16

Some fields in the hard-interface data structure are specific to the B.A.T.M.A.N. V protocol and have to be initialized only when such protocol is compiled in. Instead of having a #ifdef block in the middle of the hard-interface.c code it is better to have an algorithm private function that hides the precompiler logic in its own header file (like other functions). Fixes: ffd2f27908e5 ("batman-adv: Only init ELP tweaking options when BATMAN_V is enabled") Signed-off-by: Antonio Quartulli <a(a)unstable.cc> --- Changes from v1: - move bat_algo.h include line to the right location Changes from v2: - rebased on top of newest master to fix compile error. Changes from v3: - add missing "#include <linux/atomic.h>" net/batman-adv/bat_v.c | 15 +++++++++++++++ net/batman-adv/bat_v.h | 5 +++++ net/batman-adv/hard-interface.c | 10 ++-------- 3 files changed, 22 insertions(+), 8 deletions(-) diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c index e4a91cd..7231440 100644 --- a/net/batman-adv/bat_v.c +++ b/net/batman-adv/bat_v.c @@ -18,6 +18,7 @@ #include "bat_v.h" #include "main.h" +#include <linux/atomic.h> #include <linux/bug.h> #include <linux/cache.h> #include <linux/init.h> @@ -334,6 +335,20 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = { }; /** + * batadv_v_hardif_init - initialize the algorithm specific fields in the + * hard-interface object + * @hard_iface: the hard-interface to initialize + */ +void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface) +{ + /* enable link throughput auto-detection by setting the throughput + * override to zero + */ + atomic_set(&hard_iface->bat_v.throughput_override, 0); + atomic_set(&hard_iface->bat_v.elp_interval, 500); +} + +/** * batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a * mesh * @bat_priv: the object representing the mesh interface to initialise diff --git a/net/batman-adv/bat_v.h b/net/batman-adv/bat_v.h index 52dd6cf..83b7763 100644 --- a/net/batman-adv/bat_v.h +++ b/net/batman-adv/bat_v.h @@ -23,6 +23,7 @@ #ifdef CONFIG_BATMAN_ADV_BATMAN_V int batadv_v_init(void); +void batadv_v_hardif_init(struct batadv_hard_iface *hardif); int batadv_v_mesh_init(struct batadv_priv *bat_priv); void batadv_v_mesh_free(struct batadv_priv *bat_priv); @@ -33,6 +34,10 @@ static inline int batadv_v_init(void) return 0; } +static inline void batadv_v_hardif_init(struct batadv_hard_iface *hardif) +{ +} + static inline int batadv_v_mesh_init(struct batadv_priv *bat_priv) { return 0; diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 6689656..70841c1 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -37,6 +37,7 @@ #include <linux/spinlock.h> #include <linux/workqueue.h> +#include "bat_v.h" #include "bridge_loop_avoidance.h" #include "debugfs.h" #include "distributed-arp-table.h" @@ -684,14 +685,7 @@ batadv_hardif_add_interface(struct net_device *net_dev) if (batadv_is_wifi_netdev(net_dev)) hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS; -#ifdef CONFIG_BATMAN_ADV_BATMAN_V - /* enable link throughput auto-detection by setting the throughput - * override to zero - */ - atomic_set(&hard_iface->bat_v.throughput_override, 0); - - atomic_set(&hard_iface->bat_v.elp_interval, 500); -#endif + batadv_v_hardif_init(hard_iface); /* extra reference for return */ kref_init(&hard_iface->refcount); -- 2.8.3

3 2

[B.A.T.M.A.N.] [PATCH 1/2] batman-adv: remove useless forward declarations
by Antonio Quartulli 06 Jun '16

06 Jun '16

If main.h is included, the batman-adv private forward declarations are not needed anymore. Remove them. Cc: Sven Eckelmann <sven(a)narfation.org> Signed-off-by: Antonio Quartulli <a(a)unstable.cc> --- net/batman-adv/gateway_client.h | 1 - net/batman-adv/icmp_socket.h | 2 -- 2 files changed, 3 deletions(-) diff --git a/net/batman-adv/gateway_client.h b/net/batman-adv/gateway_client.h index 582dd8c..c74aca5 100644 --- a/net/batman-adv/gateway_client.h +++ b/net/batman-adv/gateway_client.h @@ -22,7 +22,6 @@ #include <linux/types.h> -struct batadv_tvlv_gateway_data; struct seq_file; struct sk_buff; diff --git a/net/batman-adv/icmp_socket.h b/net/batman-adv/icmp_socket.h index 618d5de..ce3ed25 100644 --- a/net/batman-adv/icmp_socket.h +++ b/net/batman-adv/icmp_socket.h @@ -22,8 +22,6 @@ #include <linux/types.h> -struct batadv_icmp_header; - #define BATADV_ICMP_SOCKET "socket" void batadv_socket_init(void); -- 2.8.3

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[B.A.T.M.A.N.] [PATCH] batman-adv: fix returned error in batadv_netlink_tp_meter_cancel
by Sven Eckelmann 06 Jun '16

06 Jun '16

From: Simon Wunderlich <sw(a)simonwunderlich.de> The BATADV_CMD_TP_METER_CANCEL netlink cmd can for example fail when no valid soft_iface can be found. This error should not only detected but also be reported back to the caller. Fixes: 98d7a766b645 ("batman-adv: throughput meter implementation") Signed-off-by: Simon Wunderlich <sw(a)simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/netlink.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 56e63ce..c25bbb8 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -350,7 +350,7 @@ batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info) struct batadv_priv *bat_priv; int ifindex; u8 *dst; - int ret; + int ret = 0; if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) return -EINVAL; @@ -377,7 +377,7 @@ out: if (soft_iface) dev_put(soft_iface); - return 0; + return ret; } static struct genl_ops batadv_netlink_ops[] = { -- 2.8.1

2 1

[B.A.T.M.A.N.] [PATCH] batman-adv: remove unused vid local variable in tt seq print
by Sven Eckelmann 06 Jun '16

06 Jun '16

From: Simon Wunderlich <sw(a)simonwunderlich.de> Signed-off-by: Simon Wunderlich <sw(a)simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/translation-table.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index bfb90b6..fff1f38 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -1006,7 +1006,6 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) struct batadv_tt_local_entry *tt_local; struct batadv_hard_iface *primary_if; struct hlist_head *head; - unsigned short vid; u32 i; int last_seen_secs; int last_seen_msecs; @@ -1033,7 +1032,6 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) tt_local = container_of(tt_common_entry, struct batadv_tt_local_entry, common); - vid = tt_common_entry->vid; last_seen_jiffies = jiffies - tt_local->last_seen; last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); last_seen_secs = last_seen_msecs / 1000; -- 2.8.1

2 1

[B.A.T.M.A.N.] [PATCH] batman-adv: Ignore auto-generated files in compat-sources
by Sven Eckelmann 06 Jun '16

06 Jun '16

Signed-off-by: Sven Eckelmann <sven.eckelmann(a)open-mesh.com> --- .gitignore | 2 ++ 1 file changed, 2 insertions(+) diff --git a/.gitignore b/.gitignore index 59c6a30..4c03561 100644 --- a/.gitignore +++ b/.gitignore @@ -1,5 +1,7 @@ /compat-autoconf.h /compat-autoconf.h.tmp +/compat-sources/**/.* +/compat-sources/**/*.o /net/batman-adv/.* /net/batman-adv/batman-adv.ko /net/batman-adv/batman-adv.mod.c -- 2.8.1

2 1

[B.A.T.M.A.N.] [PATCH v3] batman-adv: Fix build against recent Debian Stretch kernels
by Sven Eckelmann 06 Jun '16

06 Jun '16

The kernels for Debian stretch require some special CFLAGS settings which are only correctly defined when NOSTDINC_FLAGS is defined inside the execution of the Makefile via kbuild. But batman-adv sets it currently outside to insert compatibility include headers and compat-sources. This can be avoided by making the top Makefile kbuild compatible and redefining the NOSTDINC_FLAGS when kbuild include this Makefile. The actual build of the batman-adv module is then done by adding the subdirectory to obj-y. Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- v3: - append NOSTDINC_FLAGS with our own flags instead of overwriting it v2: - Fixed noise from other patches in context (should now apply cleanly on next) Makefile | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index 5d2c058..2568fb2 100644 --- a/Makefile +++ b/Makefile @@ -43,7 +43,7 @@ RM ?= rm -f REVISION= $(shell if [ -d "$(PWD)/.git" ]; then \ echo $$(git --git-dir="$(PWD)/.git" describe --always --dirty --match "v*" |sed 's/^v//' 2> /dev/null || echo "[unknown]"); \ fi) -export NOSTDINC_FLAGS := \ +NOSTDINC_FLAGS += \ -I$(PWD)/compat-include/ \ -include $(PWD)/compat.h \ $(CFLAGS) @@ -52,8 +52,12 @@ ifneq ($(REVISION),) NOSTDINC_FLAGS += -DBATADV_SOURCE_VERSION=\"$(REVISION)\" endif +obj-y += net/batman-adv/ + BUILD_FLAGS := \ - M=$(PWD)/net/batman-adv \ + M=$(PWD) \ + PWD=$(PWD) \ + REVISION=$(REVISION) \ CONFIG_BATMAN_ADV=m \ CONFIG_BATMAN_ADV_DEBUG=$(CONFIG_BATMAN_ADV_DEBUG) \ CONFIG_BATMAN_ADV_BLA=$(CONFIG_BATMAN_ADV_BLA) \ @@ -61,7 +65,7 @@ BUILD_FLAGS := \ CONFIG_BATMAN_ADV_NC=$(CONFIG_BATMAN_ADV_NC) \ CONFIG_BATMAN_ADV_MCAST=$(CONFIG_BATMAN_ADV_MCAST) \ CONFIG_BATMAN_ADV_BATMAN_V=$(CONFIG_BATMAN_ADV_BATMAN_V) \ - INSTALL_MOD_DIR=updates/net/batman-adv/ + INSTALL_MOD_DIR=updates/ all: config $(MAKE) -C $(KERNELPATH) $(BUILD_FLAGS) modules -- 2.8.1

3 2

[B.A.T.M.A.N.] [PATCH 1/5] batman-adv: Clean up untagged vlan when destroying via rtnl-link
by Sven Eckelmann 06 Jun '16

06 Jun '16

The untagged vlan object is only destroyed when the interface is removed via the legacy sysfs interface. But it also has to be destroyed when the standard rtnl-link interface is used. Fixes: 952cebb57518 ("batman-adv: add per VLAN interface attribute framework") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> Cc: Antonio Quartulli <a(a)unstable.cc> --- net/batman-adv/soft-interface.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 18b6d07..7527c06 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -1040,7 +1040,9 @@ void batadv_softif_destroy_sysfs(struct net_device *soft_iface) static void batadv_softif_destroy_netlink(struct net_device *soft_iface, struct list_head *head) { + struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *hard_iface; + struct batadv_softif_vlan *vlan; list_for_each_entry(hard_iface, &batadv_hardif_list, list) { if (hard_iface->soft_iface == soft_iface) @@ -1048,6 +1050,13 @@ static void batadv_softif_destroy_netlink(struct net_device *soft_iface, BATADV_IF_CLEANUP_KEEP); } + /* destroy the "untagged" VLAN */ + vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); + if (vlan) { + batadv_softif_destroy_vlan(bat_priv, vlan); + batadv_softif_vlan_put(vlan); + } + batadv_sysfs_del_meshif(soft_iface); unregister_netdevice_queue(soft_iface, head); } -- 2.8.1

3 7

[B.A.T.M.A.N.] [PATCH-maint] batman-adv: Fix ICMP RR ethernet access after skb_linearize
by Sven Eckelmann 06 Jun '16

06 Jun '16

The skb_linearize may reallocate the skb. This makes the calculated pointer for ethhdr invalid. But it the pointer is used later to fill in the RR field of the batadv_icmp_packet_rr packet. Instead re-evaluate eth_hdr after the skb_linearize+skb_cow to fix the pointer and avoid the invalid read. Fixes: bb69cb678d37 ("batman-adv: generalize batman-adv icmp packet handling") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/routing.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 0c0c30e..27e07dd 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -374,6 +374,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb, if (skb_cow(skb, ETH_HLEN) < 0) goto out; + ethhdr = eth_hdr(skb); icmph = (struct batadv_icmp_header *)skb->data; icmp_packet_rr = (struct batadv_icmp_packet_rr *)icmph; if (icmp_packet_rr->rr_cur >= BATADV_RR_LEN) -- 2.8.1

2 1

[B.A.T.M.A.N.] [PATCHv2] batman-adv: Refactor forward packet creation/destruction
by Linus Lüssing 05 Jun '16

05 Jun '16

This patch abstracts the forward packet creation and destruction via the new functions batadv_forw_packet_alloc() and batadv_forw_packet_free(). This should simplify the freeing of a forward packet as for instance queue counting is now done internally. Signed-off-by: Linus Lüssing <linus.luessing(a)c0d3.blue> --- Changelog v2: * Rebase to current master * Fixed typo: "ressources" vs. "resources" * Moved forw_packet->num_packets initialization into forw_packet_alloc(), too * Adjusted commit message Zombie patch - rotten & dead since 2013, but w{al,or}ks again! net/batman-adv/bat_iv_ogm.c | 34 ++++---------- net/batman-adv/send.c | 103 +++++++++++++++++++++++++++++++------------ net/batman-adv/send.h | 6 +++ net/batman-adv/types.h | 2 + 4 files changed, 92 insertions(+), 53 deletions(-) diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index e2d8848..5a7923c 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -685,19 +685,12 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, struct batadv_forw_packet *forw_packet_aggr; unsigned char *skb_buff; unsigned int skb_size; + atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left; - /* own packet should always be scheduled */ - if (!own_packet) { - if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "batman packet queue full\n"); - return; - } - } - - forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); + forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, + queue_left, bat_priv); if (!forw_packet_aggr) - goto out_nomem; + return; if (atomic_read(&bat_priv->aggregated_ogms) && packet_len < BATADV_MAX_AGGREGATION_BYTES) @@ -709,7 +702,8 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); if (!forw_packet_aggr->skb) - goto out_free_forw_packet; + goto packet_free; + forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; skb_reserve(forw_packet_aggr->skb, ETH_HLEN); @@ -717,12 +711,7 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, forw_packet_aggr->packet_len = packet_len; memcpy(skb_buff, packet_buff, packet_len); - kref_get(&if_incoming->refcount); - kref_get(&if_outgoing->refcount); forw_packet_aggr->own = own_packet; - forw_packet_aggr->if_incoming = if_incoming; - forw_packet_aggr->if_outgoing = if_outgoing; - forw_packet_aggr->num_packets = 0; forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; forw_packet_aggr->send_time = send_time; @@ -743,11 +732,8 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, send_time - jiffies); return; -out_free_forw_packet: - kfree(forw_packet_aggr); -out_nomem: - if (!own_packet) - atomic_inc(&bat_priv->batman_queue_left); +packet_free: + batadv_forw_packet_free(forw_packet_aggr); } /* aggregate a new packet into the existing ogm packet */ @@ -1830,10 +1816,6 @@ static void batadv_iv_send_outstanding_bat_ogm_packet(struct work_struct *work) batadv_iv_ogm_schedule(forw_packet->if_incoming); out: - /* don't count own packet */ - if (!forw_packet->own) - atomic_inc(&bat_priv->batman_queue_left); - batadv_forw_packet_free(forw_packet); } diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 49836da..711f8a8 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -430,6 +430,13 @@ int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, orig_node, vid); } +/** + * batadv_forw_packet_free - free a forwarding packet + * @forw_packet: The packet to free + * + * This frees a forwarding packet and releases any resources it might + * have claimed. + */ void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) { kfree_skb(forw_packet->skb); @@ -437,9 +444,71 @@ void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) batadv_hardif_put(forw_packet->if_incoming); if (forw_packet->if_outgoing) batadv_hardif_put(forw_packet->if_outgoing); + if (forw_packet->queue_left) + atomic_inc(forw_packet->queue_left); kfree(forw_packet); } +/** + * batadv_forw_packet_alloc - Allocates a forwarding packet + * @if_incoming: The (optional) if_incoming to be grabbed + * @if_outgoing: The (optional) if_outgoing to be grabbed + * @queue_left: The (optional) queue counter to decrease + * @bat_priv: The bat_priv for the mesh of this forw_packet + * + * Allocates a forwarding packet and tries to get a reference to the + * (optional) if_incoming and queue_left. If queue_left is NULL then + * bat_priv is optional, too. + * + * On success, returns the allocated forwarding packet. Otherwise returns + * NULL. + */ +struct batadv_forw_packet * +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) +{ + struct batadv_forw_packet *forw_packet = NULL; + + if (queue_left && !batadv_atomic_dec_not_zero(queue_left)) { + if (queue_left == &bat_priv->bcast_queue_left) + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "bcast queue full\n"); + else if (queue_left == &bat_priv->batman_queue_left) + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "batman queue full\n"); + else + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "a mysterious queue is full\n"); + goto out; + } + + forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); + if (!forw_packet) + goto err; + + if (if_incoming) + kref_get(&if_incoming->refcount); + + if (if_outgoing) + kref_get(&if_outgoing->refcount); + + forw_packet->skb = NULL; + forw_packet->queue_left = queue_left; + forw_packet->if_incoming = if_incoming; + forw_packet->if_outgoing = if_outgoing; + forw_packet->num_packets = 0; + + goto out; + +err: + if (queue_left) + atomic_inc(queue_left); +out: + return forw_packet; +} + static void _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, struct batadv_forw_packet *forw_packet, @@ -478,20 +547,16 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, struct batadv_bcast_packet *bcast_packet; struct sk_buff *newskb; - if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "bcast packet queue full\n"); - goto out; - } - primary_if = batadv_primary_if_get_selected(bat_priv); if (!primary_if) - goto out_and_inc; - - forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); + goto out; + forw_packet = batadv_forw_packet_alloc(primary_if, NULL, + &bat_priv->bcast_queue_left, + bat_priv); + batadv_hardif_put(primary_if); if (!forw_packet) - goto out_and_inc; + goto out; newskb = skb_copy(skb, GFP_ATOMIC); if (!newskb) @@ -504,11 +569,6 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, skb_reset_mac_header(newskb); forw_packet->skb = newskb; - forw_packet->if_incoming = primary_if; - forw_packet->if_outgoing = NULL; - - /* how often did we send the bcast packet ? */ - forw_packet->num_packets = 0; INIT_DELAYED_WORK(&forw_packet->delayed_work, batadv_send_outstanding_bcast_packet); @@ -517,12 +577,8 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, return NETDEV_TX_OK; packet_free: - kfree(forw_packet); -out_and_inc: - atomic_inc(&bat_priv->bcast_queue_left); + batadv_forw_packet_free(forw_packet); out: - if (primary_if) - batadv_hardif_put(primary_if); return NETDEV_TX_BUSY; } @@ -583,7 +639,6 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work) out: batadv_forw_packet_free(forw_packet); - atomic_inc(&bat_priv->bcast_queue_left); } void @@ -624,9 +679,6 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, if (pending) { hlist_del(&forw_packet->list); - if (!forw_packet->own) - atomic_inc(&bat_priv->bcast_queue_left); - batadv_forw_packet_free(forw_packet); } } @@ -654,9 +706,6 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, if (pending) { hlist_del(&forw_packet->list); - if (!forw_packet->own) - atomic_inc(&bat_priv->batman_queue_left); - batadv_forw_packet_free(forw_packet); } } diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h index 7cecb75..999f786 100644 --- a/net/batman-adv/send.h +++ b/net/batman-adv/send.h @@ -28,6 +28,12 @@ struct sk_buff; void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet); +struct batadv_forw_packet * +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); + int batadv_send_skb_to_orig(struct sk_buff *skb, struct batadv_orig_node *orig_node, struct batadv_hard_iface *recv_if); diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index a331e3a..b1b82a2 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -1373,6 +1373,7 @@ struct batadv_skb_cb { * locally generated packet * @if_outgoing: packet where the packet should be sent to, or NULL if * unspecified + * @queue_left: The queue (counter) this packet was applied to */ struct batadv_forw_packet { struct hlist_node list; @@ -1385,6 +1386,7 @@ struct batadv_forw_packet { struct delayed_work delayed_work; struct batadv_hard_iface *if_incoming; struct batadv_hard_iface *if_outgoing; + atomic_t *queue_left; }; /** -- 1.7.10.4

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B.A.T.M.A.N May 2016