diff options
Diffstat (limited to 'net/batman-adv/distributed-arp-table.c')
| -rw-r--r-- | net/batman-adv/distributed-arp-table.c | 82 |
1 files changed, 39 insertions, 43 deletions
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 239992021b1..06345d40158 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -45,9 +45,9 @@ static void batadv_dat_start_timer(struct batadv_priv *bat_priv) } /** - * batadv_dat_entry_free_ref - decrements the dat_entry refcounter and possibly + * batadv_dat_entry_free_ref - decrement the dat_entry refcounter and possibly * free it - * @dat_entry: the oentry to free + * @dat_entry: the entry to free */ static void batadv_dat_entry_free_ref(struct batadv_dat_entry *dat_entry) { @@ -56,10 +56,10 @@ static void batadv_dat_entry_free_ref(struct batadv_dat_entry *dat_entry) } /** - * batadv_dat_to_purge - checks whether a dat_entry has to be purged or not + * batadv_dat_to_purge - check whether a dat_entry has to be purged or not * @dat_entry: the entry to check * - * Returns true if the entry has to be purged now, false otherwise + * Returns true if the entry has to be purged now, false otherwise. */ static bool batadv_dat_to_purge(struct batadv_dat_entry *dat_entry) { @@ -75,8 +75,8 @@ static bool batadv_dat_to_purge(struct batadv_dat_entry *dat_entry) * returns a boolean value: true is the entry has to be deleted, * false otherwise * - * Loops over each entry in the DAT local storage and delete it if and only if - * the to_purge function passed as argument returns true + * Loops over each entry in the DAT local storage and deletes it if and only if + * the to_purge function passed as argument returns true. */ static void __batadv_dat_purge(struct batadv_priv *bat_priv, bool (*to_purge)(struct batadv_dat_entry *)) @@ -97,7 +97,7 @@ static void __batadv_dat_purge(struct batadv_priv *bat_priv, spin_lock_bh(list_lock); hlist_for_each_entry_safe(dat_entry, node_tmp, head, hash_entry) { - /* if an helper function has been passed as parameter, + /* if a helper function has been passed as parameter, * ask it if the entry has to be purged or not */ if (to_purge && !to_purge(dat_entry)) @@ -134,7 +134,7 @@ static void batadv_dat_purge(struct work_struct *work) * @node: node in the local table * @data2: second object to compare the node to * - * Returns 1 if the two entry are the same, 0 otherwise + * Returns 1 if the two entries are the same, 0 otherwise. */ static int batadv_compare_dat(const struct hlist_node *node, const void *data2) { @@ -149,7 +149,7 @@ static int batadv_compare_dat(const struct hlist_node *node, const void *data2) * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * - * Returns the value of the hw_src field in the ARP packet + * Returns the value of the hw_src field in the ARP packet. */ static uint8_t *batadv_arp_hw_src(struct sk_buff *skb, int hdr_size) { @@ -166,7 +166,7 @@ static uint8_t *batadv_arp_hw_src(struct sk_buff *skb, int hdr_size) * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * - * Returns the value of the ip_src field in the ARP packet + * Returns the value of the ip_src field in the ARP packet. */ static __be32 batadv_arp_ip_src(struct sk_buff *skb, int hdr_size) { @@ -178,7 +178,7 @@ static __be32 batadv_arp_ip_src(struct sk_buff *skb, int hdr_size) * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * - * Returns the value of the hw_dst field in the ARP packet + * Returns the value of the hw_dst field in the ARP packet. */ static uint8_t *batadv_arp_hw_dst(struct sk_buff *skb, int hdr_size) { @@ -190,7 +190,7 @@ static uint8_t *batadv_arp_hw_dst(struct sk_buff *skb, int hdr_size) * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * - * Returns the value of the ip_dst field in the ARP packet + * Returns the value of the ip_dst field in the ARP packet. */ static __be32 batadv_arp_ip_dst(struct sk_buff *skb, int hdr_size) { @@ -202,7 +202,7 @@ static __be32 batadv_arp_ip_dst(struct sk_buff *skb, int hdr_size) * @data: data to hash * @size: size of the hash table * - * Returns the selected index in the hash table for the given data + * Returns the selected index in the hash table for the given data. */ static uint32_t batadv_hash_dat(const void *data, uint32_t size) { @@ -224,12 +224,12 @@ static uint32_t batadv_hash_dat(const void *data, uint32_t size) } /** - * batadv_dat_entry_hash_find - looks for a given dat_entry in the local hash + * batadv_dat_entry_hash_find - look for a given dat_entry in the local hash * table * @bat_priv: the bat priv with all the soft interface information * @ip: search key * - * Returns the dat_entry if found, NULL otherwise + * Returns the dat_entry if found, NULL otherwise. */ static struct batadv_dat_entry * batadv_dat_entry_hash_find(struct batadv_priv *bat_priv, __be32 ip) @@ -343,9 +343,6 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, if (hdr_size == 0) return; - /* if the ARP packet is encapsulated in a batman packet, let's print - * some debug messages - */ unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; switch (unicast_4addr_packet->u.header.packet_type) { @@ -409,7 +406,8 @@ static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, * @candidate: orig_node under evaluation * @max_orig_node: last selected candidate * - * Returns true if the node has been elected as next candidate or false othrwise + * Returns true if the node has been elected as next candidate or false + * otherwise. */ static bool batadv_is_orig_node_eligible(struct batadv_dat_candidate *res, int select, batadv_dat_addr_t tmp_max, @@ -472,7 +470,7 @@ static void batadv_choose_next_candidate(struct batadv_priv *bat_priv, */ cands[select].type = BATADV_DAT_CANDIDATE_NOT_FOUND; - /* iterate over the originator list and find the node with closest + /* iterate over the originator list and find the node with the closest * dat_address which has not been selected yet */ for (i = 0; i < hash->size; i++) { @@ -480,7 +478,7 @@ static void batadv_choose_next_candidate(struct batadv_priv *bat_priv, rcu_read_lock(); hlist_for_each_entry_rcu(orig_node, head, hash_entry) { - /* the dht space is a ring and addresses are unsigned */ + /* the dht space is a ring using unsigned addresses */ tmp_max = BATADV_DAT_ADDR_MAX - orig_node->dat_addr + ip_key; @@ -512,7 +510,7 @@ static void batadv_choose_next_candidate(struct batadv_priv *bat_priv, } /** - * batadv_dat_select_candidates - selects the nodes which the DHT message has to + * batadv_dat_select_candidates - select the nodes which the DHT message has to * be sent to * @bat_priv: the bat priv with all the soft interface information * @ip_dst: ipv4 to look up in the DHT @@ -521,7 +519,7 @@ static void batadv_choose_next_candidate(struct batadv_priv *bat_priv, * closest values (from the LEFT, with wrap around if needed) then the hash * value of the key. ip_dst is the key. * - * Returns the candidate array of size BATADV_DAT_CANDIDATE_NUM + * Returns the candidate array of size BATADV_DAT_CANDIDATE_NUM. */ static struct batadv_dat_candidate * batadv_dat_select_candidates(struct batadv_priv *bat_priv, __be32 ip_dst) @@ -558,10 +556,11 @@ batadv_dat_select_candidates(struct batadv_priv *bat_priv, __be32 ip_dst) * @ip: the DHT key * @packet_subtype: unicast4addr packet subtype to use * - * In this function the skb is copied by means of pskb_copy() and is sent as - * unicast packet to each of the selected candidates + * This function copies the skb with pskb_copy() and is sent as unicast packet + * to each of the selected candidates. * - * Returns true if the packet is sent to at least one candidate, false otherwise + * Returns true if the packet is sent to at least one candidate, false + * otherwise. */ static bool batadv_dat_send_data(struct batadv_priv *bat_priv, struct sk_buff *skb, __be32 ip, @@ -727,7 +726,7 @@ out: * @skb: packet to analyse * @hdr_size: size of the possible header before the ARP packet in the skb * - * Returns the ARP type if the skb contains a valid ARP packet, 0 otherwise + * Returns the ARP type if the skb contains a valid ARP packet, 0 otherwise. */ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv, struct sk_buff *skb, int hdr_size) @@ -754,9 +753,7 @@ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv, arphdr = (struct arphdr *)(skb->data + hdr_size + ETH_HLEN); - /* Check whether the ARP packet carries a valid - * IP information - */ + /* check whether the ARP packet carries a valid IP information */ if (arphdr->ar_hrd != htons(ARPHRD_ETHER)) goto out; @@ -784,7 +781,7 @@ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv, if (is_zero_ether_addr(hw_src) || is_multicast_ether_addr(hw_src)) goto out; - /* we don't care about the destination MAC address in ARP requests */ + /* don't care about the destination MAC address in ARP requests */ if (arphdr->ar_op != htons(ARPOP_REQUEST)) { hw_dst = batadv_arp_hw_dst(skb, hdr_size); if (is_zero_ether_addr(hw_dst) || @@ -804,8 +801,8 @@ out: * @skb: packet to check * * Returns true if the message has been sent to the dht candidates, false - * otherwise. In case of true the message has to be enqueued to permit the - * fallback + * otherwise. In case of a positive return value the message has to be enqueued + * to permit the fallback. */ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, struct sk_buff *skb) @@ -867,7 +864,7 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, batadv_dbg(BATADV_DBG_DAT, bat_priv, "ARP request replied locally\n"); ret = true; } else { - /* Send the request on the DHT */ + /* Send the request to the DHT */ ret = batadv_dat_send_data(bat_priv, skb, ip_dst, BATADV_P_DAT_DHT_GET); } @@ -884,7 +881,7 @@ out: * @skb: packet to check * @hdr_size: size of the encapsulation header * - * Returns true if the request has been answered, false otherwise + * Returns true if the request has been answered, false otherwise. */ bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, struct sk_buff *skb, int hdr_size) @@ -924,10 +921,9 @@ bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, if (!skb_new) goto out; - /* to preserve backwards compatibility, here the node has to answer - * using the same packet type it received for the request. This is due - * to that if a node is not using the 4addr packet format it may not - * support it. + /* To preserve backwards compatibility, the node has choose the outgoing + * format based on the incoming request packet type. The assumption is + * that a node not using the 4addr packet format doesn't support it. */ if (hdr_size == sizeof(struct batadv_unicast_4addr_packet)) err = batadv_unicast_4addr_send_skb(bat_priv, skb_new, @@ -977,7 +973,7 @@ void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, batadv_dat_entry_add(bat_priv, ip_dst, hw_dst); /* Send the ARP reply to the candidates for both the IP addresses that - * the node got within the ARP reply + * the node obtained from the ARP reply */ batadv_dat_send_data(bat_priv, skb, ip_src, BATADV_P_DAT_DHT_PUT); batadv_dat_send_data(bat_priv, skb, ip_dst, BATADV_P_DAT_DHT_PUT); @@ -987,7 +983,7 @@ void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, * DAT storage only * @bat_priv: the bat priv with all the soft interface information * @skb: packet to check - * @hdr_size: siaze of the encapsulation header + * @hdr_size: size of the encapsulation header */ bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, struct sk_buff *skb, int hdr_size) @@ -1031,11 +1027,11 @@ out: /** * batadv_dat_drop_broadcast_packet - check if an ARP request has to be dropped - * (because the node has already got the reply via DAT) or not + * (because the node has already obtained the reply via DAT) or not * @bat_priv: the bat priv with all the soft interface information * @forw_packet: the broadcast packet * - * Returns true if the node can drop the packet, false otherwise + * Returns true if the node can drop the packet, false otherwise. */ bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, struct batadv_forw_packet *forw_packet) |