diff options
Diffstat (limited to 'net/batman-adv/bat_iv_ogm.c')
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 115 |
1 files changed, 62 insertions, 53 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index df625de55ef2..cb2d1b9b0340 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: +/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -31,6 +31,7 @@ #include <linux/init.h> #include <linux/jiffies.h> #include <linux/list.h> +#include <linux/kref.h> #include <linux/netdevice.h> #include <linux/pkt_sched.h> #include <linux/printk.h> @@ -88,7 +89,7 @@ static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) * in the given ring buffer * @lq_recv: pointer to the ring buffer * - * Returns computed average value. + * Return: computed average value. */ static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) { @@ -132,7 +133,7 @@ static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) * @orig_node: the orig_node that has to be changed * @max_if_num: the current amount of interfaces * - * Returns 0 on success, a negative error code otherwise. + * Return: 0 on success, a negative error code otherwise. */ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, int max_if_num) @@ -180,7 +181,7 @@ unlock: * @max_if_num: the current amount of interfaces * @del_if_num: the index of the interface being removed * - * Returns 0 on success, a negative error code otherwise. + * Return: 0 on success, a negative error code otherwise. */ static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, int max_if_num, int del_if_num) @@ -246,7 +247,7 @@ unlock: * @bat_priv: the bat priv with all the soft interface information * @addr: mac address of the originator * - * Returns the originator object corresponding to the passed mac address or NULL + * Return: the originator object corresponding to the passed mac address or NULL * on failure. * If the object does not exists it is created an initialised. */ @@ -286,8 +287,8 @@ batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) free_orig_node: /* free twice, as batadv_orig_node_new sets refcount to 2 */ - batadv_orig_node_free_ref(orig_node); - batadv_orig_node_free_ref(orig_node); + batadv_orig_node_put(orig_node); + batadv_orig_node_put(orig_node); return NULL; } @@ -396,7 +397,14 @@ static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) return new_tq; } -/* is there another aggregated packet here? */ +/** + * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached + * @buff_pos: current position in the skb + * @packet_len: total length of the skb + * @tvlv_len: tvlv length of the previously considered OGM + * + * Return: true if there is enough space for another OGM, false otherwise. + */ static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, __be16 tvlv_len) { @@ -470,7 +478,7 @@ static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, skb->len + ETH_HLEN); - batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); + batadv_send_broadcast_skb(skb, hard_iface); } } @@ -507,7 +515,7 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) out: if (primary_if) - batadv_hardif_free_ref(primary_if); + batadv_hardif_put(primary_if); } /** @@ -522,7 +530,7 @@ out: * @if_outgoing: interface for which the retransmission should be considered * @forw_packet: the forwarded packet which should be checked * - * Returns true if new_packet can be aggregated with forw_packet + * Return: true if new_packet can be aggregated with forw_packet */ static bool batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, @@ -609,7 +617,7 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, out: if (primary_if) - batadv_hardif_free_ref(primary_if); + batadv_hardif_put(primary_if); return res; } @@ -636,10 +644,10 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, unsigned char *skb_buff; unsigned int skb_size; - if (!atomic_inc_not_zero(&if_incoming->refcount)) + if (!kref_get_unless_zero(&if_incoming->refcount)) return; - if (!atomic_inc_not_zero(&if_outgoing->refcount)) + if (!kref_get_unless_zero(&if_outgoing->refcount)) goto out_free_incoming; /* own packet should always be scheduled */ @@ -703,9 +711,9 @@ out_nomem: if (!own_packet) atomic_inc(&bat_priv->batman_queue_left); out_free_outgoing: - batadv_hardif_free_ref(if_outgoing); + batadv_hardif_put(if_outgoing); out_free_incoming: - batadv_hardif_free_ref(if_incoming); + batadv_hardif_put(if_incoming); } /* aggregate a new packet into the existing ogm packet */ @@ -950,7 +958,7 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) out: if (primary_if) - batadv_hardif_free_ref(primary_if); + batadv_hardif_put(primary_if); } /** @@ -995,9 +1003,9 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, neigh_addr = tmp_neigh_node->addr; if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && tmp_neigh_node->if_incoming == if_incoming && - atomic_inc_not_zero(&tmp_neigh_node->refcount)) { + kref_get_unless_zero(&tmp_neigh_node->refcount)) { if (WARN(neigh_node, "too many matching neigh_nodes")) - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_put(neigh_node); neigh_node = tmp_neigh_node; continue; } @@ -1018,7 +1026,7 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, neigh_ifinfo->bat_iv.tq_avg = tq_avg; spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); - batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + batadv_neigh_ifinfo_put(neigh_ifinfo); neigh_ifinfo = NULL; } @@ -1033,7 +1041,7 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, ethhdr->h_source, orig_node, orig_tmp); - batadv_orig_node_free_ref(orig_tmp); + batadv_orig_node_put(orig_tmp); if (!neigh_node) goto unlock; } else { @@ -1108,13 +1116,13 @@ unlock: rcu_read_unlock(); out: if (neigh_node) - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_put(neigh_node); if (router) - batadv_neigh_node_free_ref(router); + batadv_neigh_node_put(router); if (neigh_ifinfo) - batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + batadv_neigh_ifinfo_put(neigh_ifinfo); if (router_ifinfo) - batadv_neigh_ifinfo_free_ref(router_ifinfo); + batadv_neigh_ifinfo_put(router_ifinfo); } /** @@ -1125,7 +1133,7 @@ out: * @if_incoming: interface where the packet was received * @if_outgoing: interface for which the retransmission should be considered * - * Returns 1 if the link can be considered bidirectional, 0 otherwise + * Return: 1 if the link can be considered bidirectional, 0 otherwise */ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, struct batadv_orig_node *orig_neigh_node, @@ -1154,7 +1162,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, if (tmp_neigh_node->if_incoming != if_incoming) continue; - if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) + if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) continue; neigh_node = tmp_neigh_node; @@ -1184,7 +1192,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); if (neigh_ifinfo) { neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; - batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + batadv_neigh_ifinfo_put(neigh_ifinfo); } else { neigh_rq_count = 0; } @@ -1257,7 +1265,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, out: if (neigh_node) - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_put(neigh_node); return ret; } @@ -1269,7 +1277,7 @@ out: * @if_incoming: interface on which the OGM packet was received * @if_outgoing: interface for which the retransmission should be considered * - * Returns duplicate status as enum batadv_dup_status + * Return: duplicate status as enum batadv_dup_status */ static enum batadv_dup_status batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, @@ -1298,7 +1306,7 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); if (WARN_ON(!orig_ifinfo)) { - batadv_orig_node_free_ref(orig_node); + batadv_orig_node_put(orig_node); return 0; } @@ -1308,7 +1316,8 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, /* signalize caller that the packet is to be dropped. */ if (!hlist_empty(&orig_node->neigh_list) && batadv_window_protected(bat_priv, seq_diff, - &orig_ifinfo->batman_seqno_reset)) { + BATADV_TQ_LOCAL_WINDOW_SIZE, + &orig_ifinfo->batman_seqno_reset, NULL)) { ret = BATADV_PROTECTED; goto out; } @@ -1344,7 +1353,7 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, packet_count = bitmap_weight(bitmap, BATADV_TQ_LOCAL_WINDOW_SIZE); neigh_ifinfo->bat_iv.real_packet_count = packet_count; - batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + batadv_neigh_ifinfo_put(neigh_ifinfo); } rcu_read_unlock(); @@ -1358,8 +1367,8 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, out: spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); - batadv_orig_node_free_ref(orig_node); - batadv_orig_ifinfo_free_ref(orig_ifinfo); + batadv_orig_node_put(orig_node); + batadv_orig_ifinfo_put(orig_ifinfo); return ret; } @@ -1505,7 +1514,7 @@ batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, ogm_packet, if_incoming, if_outgoing, dup_status); } - batadv_orig_ifinfo_free_ref(orig_ifinfo); + batadv_orig_ifinfo_put(orig_ifinfo); /* only forward for specific interface, not for the default one. */ if (if_outgoing == BATADV_IF_DEFAULT) @@ -1554,18 +1563,18 @@ batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, out_neigh: if ((orig_neigh_node) && (!is_single_hop_neigh)) - batadv_orig_node_free_ref(orig_neigh_node); + batadv_orig_node_put(orig_neigh_node); out: if (router_ifinfo) - batadv_neigh_ifinfo_free_ref(router_ifinfo); + batadv_neigh_ifinfo_put(router_ifinfo); if (router) - batadv_neigh_node_free_ref(router); + batadv_neigh_node_put(router); if (router_router) - batadv_neigh_node_free_ref(router_router); + batadv_neigh_node_put(router_router); if (orig_neigh_router) - batadv_neigh_node_free_ref(orig_neigh_router); + batadv_neigh_node_put(orig_neigh_router); if (hardif_neigh) - batadv_hardif_neigh_free_ref(hardif_neigh); + batadv_hardif_neigh_put(hardif_neigh); kfree_skb(skb_priv); } @@ -1688,7 +1697,7 @@ static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Drop packet: originator packet from myself (via neighbor)\n"); - batadv_orig_node_free_ref(orig_neigh_node); + batadv_orig_node_put(orig_neigh_node); return; } @@ -1726,7 +1735,7 @@ static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, } rcu_read_unlock(); - batadv_orig_node_free_ref(orig_node); + batadv_orig_node_put(orig_node); } static int batadv_iv_ogm_receive(struct sk_buff *skb, @@ -1796,7 +1805,7 @@ batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, neigh_node->addr, n_ifinfo->bat_iv.tq_avg); - batadv_neigh_ifinfo_free_ref(n_ifinfo); + batadv_neigh_ifinfo_put(n_ifinfo); } } @@ -1859,9 +1868,9 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, batman_count++; next: - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_put(neigh_node); if (n_ifinfo) - batadv_neigh_ifinfo_free_ref(n_ifinfo); + batadv_neigh_ifinfo_put(n_ifinfo); } rcu_read_unlock(); } @@ -1929,7 +1938,7 @@ static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, * @neigh2: the second neighbor object of the comparison * @if_outgoing2: outgoing interface for the second neighbor * - * Returns a value less, equal to or greater than 0 if the metric via neigh1 is + * Return: a value less, equal to or greater than 0 if the metric via neigh1 is * lower, the same as or higher than the metric via neigh2 */ static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, @@ -1955,9 +1964,9 @@ static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, out: if (neigh1_ifinfo) - batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + batadv_neigh_ifinfo_put(neigh1_ifinfo); if (neigh2_ifinfo) - batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + batadv_neigh_ifinfo_put(neigh2_ifinfo); return diff; } @@ -1970,7 +1979,7 @@ out: * @neigh2: the second neighbor object of the comparison * @if_outgoing2: outgoing interface for the second neighbor * - * Returns true if the metric via neigh1 is equally good or better than + * Return: true if the metric via neigh1 is equally good or better than * the metric via neigh2, false otherwise. */ static bool @@ -1998,9 +2007,9 @@ batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, out: if (neigh1_ifinfo) - batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + batadv_neigh_ifinfo_put(neigh1_ifinfo); if (neigh2_ifinfo) - batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + batadv_neigh_ifinfo_put(neigh2_ifinfo); return ret; } |