diff options
author | Linus Lüssing <linus.luessing@c0d3.blue> | 2016-06-20 22:39:54 +0300 |
---|---|---|
committer | Simon Wunderlich <sw@simonwunderlich.de> | 2016-08-09 08:54:32 +0300 |
commit | a65e5481315e0754a20f58aa374423610a311f33 (patch) | |
tree | 32a59a2b19862ac384c81babaf03f3b18a7bcf47 /net/batman-adv/bat_iv_ogm.c | |
parent | 4fd261bf586b0fc932d5fd20d9b1648547b16eca (diff) | |
download | linux-a65e5481315e0754a20f58aa374423610a311f33.tar.xz |
batman-adv: Introduce forward packet creation helper
This patch abstracts the forward packet creation into the new function
batadv_forw_packet_alloc().
The queue counting and interface reference counters are now handled
internally within batadv_forw_packet_alloc() and its
batadv_forw_packet_free() counterpart. This should reduce the risk of
having reference/queue counting bugs again and should increase
code readibility.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv/bat_iv_ogm.c')
-rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 38 |
1 files changed, 9 insertions, 29 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 57e0af9b39e4..a40cdf273625 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -675,19 +675,12 @@ 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) @@ -698,8 +691,11 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, skb_size += ETH_HLEN; forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); - if (!forw_packet_aggr->skb) - goto out_free_forw_packet; + if (!forw_packet_aggr->skb) { + batadv_forw_packet_free(forw_packet_aggr); + return; + } + forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; skb_reserve(forw_packet_aggr->skb, ETH_HLEN); @@ -707,12 +703,7 @@ 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; @@ -731,13 +722,6 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, queue_delayed_work(batadv_event_workqueue, &forw_packet_aggr->delayed_work, send_time - jiffies); - - return; -out_free_forw_packet: - kfree(forw_packet_aggr); -out_nomem: - if (!own_packet) - atomic_inc(&bat_priv->batman_queue_left); } /* aggregate a new packet into the existing ogm packet */ @@ -1820,10 +1804,6 @@ 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); } |