cregit-Linux how code gets into the kernel

Release 4.8 net/batman-adv/distributed-arp-table.c

Directory: net/batman-adv
/* Copyright (C) 2011-2016  B.A.T.M.A.N. contributors:
 *
 * Antonio Quartulli
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "distributed-arp-table.h"
#include "main.h"

#include <linux/atomic.h>
#include <linux/bitops.h>
#include <linux/byteorder/generic.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/fs.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/workqueue.h>
#include <net/arp.h>

#include "hard-interface.h"
#include "hash.h"
#include "log.h"
#include "originator.h"
#include "send.h"
#include "translation-table.h"
#include "tvlv.h"

static void batadv_dat_purge(struct work_struct *work);

/**
 * batadv_dat_start_timer - initialise the DAT periodic worker
 * @bat_priv: the bat priv with all the soft interface information
 */

static void batadv_dat_start_timer(struct batadv_priv *bat_priv) { INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge); queue_delayed_work(batadv_event_workqueue, &bat_priv->dat.work, msecs_to_jiffies(10000)); }

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antonio quartulliantonio quartulli40100.00%2100.00%
Total40100.00%2100.00%

/** * batadv_dat_entry_release - release dat_entry from lists and queue for free * after rcu grace period * @ref: kref pointer of the dat_entry */
static void batadv_dat_entry_release(struct kref *ref) { struct batadv_dat_entry *dat_entry; dat_entry = container_of(ref, struct batadv_dat_entry, refcount); kfree_rcu(dat_entry, rcu); }

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sven eckelmannsven eckelmann35100.00%1100.00%
Total35100.00%1100.00%

/** * batadv_dat_entry_put - decrement the dat_entry refcounter and possibly * release it * @dat_entry: dat_entry to be free'd */
static void batadv_dat_entry_put(struct batadv_dat_entry *dat_entry) { kref_put(&dat_entry->refcount, batadv_dat_entry_release); }

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antonio quartulliantonio quartulli1885.71%250.00%
sven eckelmannsven eckelmann314.29%250.00%
Total21100.00%4100.00%

/** * batadv_dat_to_purge - check whether a dat_entry has to be purged or not * @dat_entry: the entry to check * * Return: true if the entry has to be purged now, false otherwise. */
static bool batadv_dat_to_purge(struct batadv_dat_entry *dat_entry) { return batadv_has_timed_out(dat_entry->last_update, BATADV_DAT_ENTRY_TIMEOUT); }

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antonio quartulliantonio quartulli21100.00%1100.00%
Total21100.00%1100.00%

/** * __batadv_dat_purge - delete entries from the DAT local storage * @bat_priv: the bat priv with all the soft interface information * @to_purge: function in charge to decide whether an entry has to be purged or * not. This function takes the dat_entry as argument and has to * returns a boolean value: true is the entry has to be deleted, * false otherwise * * 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 *)) { spinlock_t *list_lock; /* protects write access to the hash lists */ struct batadv_dat_entry *dat_entry; struct hlist_node *node_tmp; struct hlist_head *head; u32 i; if (!bat_priv->dat.hash) return; for (i = 0; i < bat_priv->dat.hash->size; i++) { head = &bat_priv->dat.hash->table[i]; list_lock = &bat_priv->dat.hash->list_locks[i]; spin_lock_bh(list_lock); hlist_for_each_entry_safe(dat_entry, node_tmp, head, hash_entry) { /* 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)) continue; hlist_del_rcu(&dat_entry->hash_entry); batadv_dat_entry_put(dat_entry); } spin_unlock_bh(list_lock); } }

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antonio quartulliantonio quartulli14495.36%233.33%
sasha levinsasha levin42.65%116.67%
sven eckelmannsven eckelmann21.32%233.33%
marek lindnermarek lindner10.66%116.67%
Total151100.00%6100.00%

/** * batadv_dat_purge - periodic task that deletes old entries from the local DAT * hash table * @work: kernel work struct */
static void batadv_dat_purge(struct work_struct *work) { struct delayed_work *delayed_work; struct batadv_priv_dat *priv_dat; struct batadv_priv *bat_priv; delayed_work = to_delayed_work(work); priv_dat = container_of(delayed_work, struct batadv_priv_dat, work); bat_priv = container_of(priv_dat, struct batadv_priv, dat); __batadv_dat_purge(bat_priv, batadv_dat_to_purge); batadv_dat_start_timer(bat_priv); }

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antonio quartulliantonio quartulli6898.55%266.67%
geliang tanggeliang tang11.45%133.33%
Total69100.00%3100.00%

/** * batadv_compare_dat - comparing function used in the local DAT hash table * @node: node in the local table * @data2: second object to compare the node to * * Return: true if the two entries are the same, false otherwise. */
static bool batadv_compare_dat(const struct hlist_node *node, const void *data2) { const void *data1 = container_of(node, struct batadv_dat_entry, hash_entry); return memcmp(data1, data2, sizeof(__be32)) == 0; }

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antonio quartulliantonio quartulli4697.87%150.00%
sven eckelmannsven eckelmann12.13%150.00%
Total47100.00%2100.00%

/** * batadv_arp_hw_src - extract the hw_src field from an ARP packet * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * * Return: the value of the hw_src field in the ARP packet. */
static u8 *batadv_arp_hw_src(struct sk_buff *skb, int hdr_size) { u8 *addr; addr = (u8 *)(skb->data + hdr_size); addr += ETH_HLEN + sizeof(struct arphdr); return addr; }

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antonio quartulliantonio quartulli4393.48%150.00%
sven eckelmannsven eckelmann36.52%150.00%
Total46100.00%2100.00%

/** * batadv_arp_ip_src - extract the ip_src field from an ARP packet * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * * Return: the value of the ip_src field in the ARP packet. */
static __be32 batadv_arp_ip_src(struct sk_buff *skb, int hdr_size) { return *(__be32 *)(batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN); }

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antonio quartulliantonio quartulli31100.00%1100.00%
Total31100.00%1100.00%

/** * batadv_arp_hw_dst - extract the hw_dst field from an ARP packet * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * * Return: the value of the hw_dst field in the ARP packet. */
static u8 *batadv_arp_hw_dst(struct sk_buff *skb, int hdr_size) { return batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN + 4; }

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antonio quartulliantonio quartulli2696.30%150.00%
sven eckelmannsven eckelmann13.70%150.00%
Total27100.00%2100.00%

/** * batadv_arp_ip_dst - extract the ip_dst field from an ARP packet * @skb: ARP packet * @hdr_size: size of the possible header before the ARP packet * * Return: the value of the ip_dst field in the ARP packet. */
static __be32 batadv_arp_ip_dst(struct sk_buff *skb, int hdr_size) { return *(__be32 *)(batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN * 2 + 4); }

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antonio quartulliantonio quartulli35100.00%1100.00%
Total35100.00%1100.00%

/** * batadv_hash_dat - compute the hash value for an IP address * @data: data to hash * @size: size of the hash table * * Return: the selected index in the hash table for the given data. */
static u32 batadv_hash_dat(const void *data, u32 size) { u32 hash = 0; const struct batadv_dat_entry *dat = data; const unsigned char *key; u32 i; key = (const unsigned char *)&dat->ip; for (i = 0; i < sizeof(dat->ip); i++) { hash += key[i]; hash += (hash << 10); hash ^= (hash >> 6); } key = (const unsigned char *)&dat->vid; for (i = 0; i < sizeof(dat->vid); i++) { hash += key[i]; hash += (hash << 10); hash ^= (hash >> 6); } hash += (hash << 3); hash ^= (hash >> 11); hash += (hash << 15); return hash % size; }

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sven eckelmannsven eckelmann9955.93%250.00%
antonio quartulliantonio quartulli7844.07%250.00%
Total177100.00%4100.00%

/** * 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 * @vid: VLAN identifier * * Return: the dat_entry if found, NULL otherwise. */
static struct batadv_dat_entry * batadv_dat_entry_hash_find(struct batadv_priv *bat_priv, __be32 ip, unsigned short vid) { struct hlist_head *head; struct batadv_dat_entry to_find, *dat_entry, *dat_entry_tmp = NULL; struct batadv_hashtable *hash = bat_priv->dat.hash; u32 index; if (!hash) return NULL; to_find.ip = ip; to_find.vid = vid; index = batadv_hash_dat(&to_find, hash->size); head = &hash->table[index]; rcu_read_lock(); hlist_for_each_entry_rcu(dat_entry, head, hash_entry) { if (dat_entry->ip != ip) continue; if (!kref_get_unless_zero(&dat_entry->refcount)) continue; dat_entry_tmp = dat_entry; break; } rcu_read_unlock(); return dat_entry_tmp; }

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antonio quartulliantonio quartulli13698.55%250.00%
sven eckelmannsven eckelmann21.45%250.00%
Total138100.00%4100.00%

/** * batadv_dat_entry_add - add a new dat entry or update it if already exists * @bat_priv: the bat priv with all the soft interface information * @ip: ipv4 to add/edit * @mac_addr: mac address to assign to the given ipv4 * @vid: VLAN identifier */
static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip, u8 *mac_addr, unsigned short vid) { struct batadv_dat_entry *dat_entry; int hash_added; dat_entry = batadv_dat_entry_hash_find(bat_priv, ip, vid); /* if this entry is already known, just update it */ if (dat_entry) { if (!batadv_compare_eth(dat_entry->mac_addr, mac_addr)) ether_addr_copy(dat_entry->mac_addr, mac_addr); dat_entry->last_update = jiffies; batadv_dbg(BATADV_DBG_DAT, bat_priv, "Entry updated: %pI4 %pM (vid: %d)\n", &dat_entry->ip, dat_entry->mac_addr, BATADV_PRINT_VID(vid)); goto out; } dat_entry = kmalloc(sizeof(*dat_entry), GFP_ATOMIC); if (!dat_entry) goto out; dat_entry->ip = ip; dat_entry->vid = vid; ether_addr_copy(dat_entry->mac_addr, mac_addr); dat_entry->last_update = jiffies; kref_init(&dat_entry->refcount); kref_get(&dat_entry->refcount); hash_added = batadv_hash_add(bat_priv->dat.hash, batadv_compare_dat, batadv_hash_dat, dat_entry, &dat_entry->hash_entry); if (unlikely(hash_added != 0)) { /* remove the reference for the hash */ batadv_dat_entry_put(dat_entry); goto out; } batadv_dbg(BATADV_DBG_DAT, bat_priv, "New entry added: %pI4 %pM (vid: %d)\n", &dat_entry->ip, dat_entry->mac_addr, BATADV_PRINT_VID(vid)); out: if (dat_entry) batadv_dat_entry_put(dat_entry); }

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antonio quartulliantonio quartulli22995.02%457.14%
sven eckelmannsven eckelmann124.98%342.86%
Total241100.00%7100.00%

#ifdef CONFIG_BATMAN_ADV_DEBUG /** * batadv_dbg_arp - print a debug message containing all the ARP packet details * @bat_priv: the bat priv with all the soft interface information * @skb: ARP packet * @type: ARP type * @hdr_size: size of the possible header before the ARP packet * @msg: message to print together with the debugging information */
static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, u16 type, int hdr_size, char *msg) { struct batadv_unicast_4addr_packet *unicast_4addr_packet; struct batadv_bcast_packet *bcast_pkt; u8 *orig_addr; __be32 ip_src, ip_dst; if (msg) batadv_dbg(BATADV_DBG_DAT, bat_priv, "%s\n", msg); ip_src = batadv_arp_ip_src(skb, hdr_size); ip_dst = batadv_arp_ip_dst(skb, hdr_size); batadv_dbg(BATADV_DBG_DAT, bat_priv, "ARP MSG = [src: %pM-%pI4 dst: %pM-%pI4]\n", batadv_arp_hw_src(skb, hdr_size), &ip_src, batadv_arp_hw_dst(skb, hdr_size), &ip_dst); if (hdr_size == 0) return; unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; switch (unicast_4addr_packet->u.packet_type) { case BATADV_UNICAST: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within a UNICAST packet\n"); break; case BATADV_UNICAST_4ADDR: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within a UNICAST_4ADDR packet (src: %pM)\n", unicast_4addr_packet->src); switch (unicast_4addr_packet->subtype) { case BATADV_P_DAT_DHT_PUT: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: DAT_DHT_PUT\n"); break; case BATADV_P_DAT_DHT_GET: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: DAT_DHT_GET\n"); break; case BATADV_P_DAT_CACHE_REPLY: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: DAT_CACHE_REPLY\n"); break; case BATADV_P_DATA: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: DATA\n"); break; default: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* type: Unknown (%u)!\n", unicast_4addr_packet->u.packet_type); } break; case BATADV_BCAST: bcast_pkt = (struct batadv_bcast_packet *)unicast_4addr_packet; orig_addr = bcast_pkt->orig; batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within a BCAST packet (src: %pM)\n", orig_addr); break; default: batadv_dbg(BATADV_DBG_DAT, bat_priv, "* encapsulated within an unknown packet type (0x%x)\n", unicast_4addr_packet->u.packet_type); } }

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antonio quartulliantonio quartulli28599.30%266.67%
sven eckelmannsven eckelmann20.70%133.33%
Total287100.00%3100.00%

#else
static void batadv_dbg_arp(struct batadv_priv *bat_priv, struct sk_buff *skb, u16 type, int hdr_size, char *msg) { }

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antonio quartulliantonio quartulli2496.00%150.00%
sven eckelmannsven eckelmann14.00%150.00%
Total25100.00%2100.00%

#endif /* CONFIG_BATMAN_ADV_DEBUG */ /** * batadv_is_orig_node_eligible - check whether a node can be a DHT candidate * @res: the array with the already selected candidates * @select: number of already selected candidates * @tmp_max: address of the currently evaluated node * @max: current round max address * @last_max: address of the last selected candidate * @candidate: orig_node under evaluation * @max_orig_node: last selected candidate * * Return: 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, batadv_dat_addr_t max, batadv_dat_addr_t last_max, struct batadv_orig_node *candidate, struct batadv_orig_node *max_orig_node) { bool ret = false; int j; /* check if orig node candidate is running DAT */ if (!test_bit(BATADV_ORIG_CAPA_HAS_DAT, &candidate->capabilities)) goto out; /* Check if this node has already been selected... */ for (j = 0; j < select; j++) if (res[j].orig_node == candidate) break; /* ..and possibly skip it */ if (j < select) goto out; /* sanity check: has it already been selected? This should not happen */ if (tmp_max > last_max) goto out; /* check if during this iteration an originator with a closer dht * address has already been found */ if (tmp_max < max) goto out; /* this is an hash collision with the temporary selected node. Choose * the one with the lowest address */ if ((tmp_max == max) && max_orig_node && (batadv_compare_eth(candidate->orig, max_orig_node->orig) > 0)) goto out; ret = true; out: return ret; }

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antonio quartulliantonio quartulli13387.50%125.00%
marek lindnermarek lindner117.24%125.00%
linus lussinglinus lussing63.95%125.00%
pau koningpau koning21.32%125.00%
Total152100.00%4100.00%

/** * batadv_choose_next_candidate - select the next DHT candidate * @bat_priv: the bat priv with all the soft interface information * @cands: candidates array * @select: number of candidates already present in the array * @ip_key: key to look up in the DHT * @last_max: pointer where the address of the selected candidate will be saved */
static void batadv_choose_next_candidate(struct batadv_priv *bat_priv, struct batadv_dat_candidate *cands, int select, batadv_dat_addr_t ip_key, batadv_dat_addr_t *last_max) { batadv_dat_addr_t max = 0; batadv_dat_addr_t tmp_max = 0; struct batadv_orig_node *orig_node, *max_orig_node = NULL; struct batadv_hashtable *hash = bat_priv->orig_hash; struct hlist_head *head; int i; /* if no node is eligible as candidate, leave the candidate type as * NOT_FOUND */ cands[select].type = BATADV_DAT_CANDIDATE_NOT_FOUND; /* 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++) { head = &hash->table[i]; rcu_read_lock(); hlist_for_each_entry_rcu(orig_node, head, hash_entry) { /* the dht space is a ring using unsigned addresses */ tmp_max = BATADV_DAT_ADDR_MAX - orig_node->dat_addr + ip_key; if (!batadv_is_orig_node_eligible(cands, select, tmp_max, max, *last_max, orig_node, max_orig_node)) continue; if (!kref_get_unless_zero(&orig_node->refcount)) continue; max = tmp_max; if (max_orig_node) batadv_orig_node_put(max_orig_node); max_orig_node = orig_node; } rcu_read_unlock(); } if (max_orig_node) { cands[select].type = BATADV_DAT_CANDIDATE_ORIG; cands[select].orig_node = max_orig_node; batadv_dbg(BATADV_DBG_DAT, bat_priv, "dat_select_candidates() %d: selected %pM addr=%u dist=%u\n", select, max_orig_node->orig, max_orig_node->dat_addr, max); } *last_max = max; }

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antonio quartulliantonio quartulli22397.38%233.33%
sven eckelmannsven eckelmann41.75%350.00%
marek lindnermarek lindner20.87%116.67%
Total229100.00%6100.00%

/** * 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 * @vid: VLAN identifier * * An originator O is selected if and only if its DHT_ID value is one of three * closest values (from the LEFT, with wrap around if needed) then the hash * value of the key. ip_dst is the key. * * Return: 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, unsigned short vid) { int select; batadv_dat_addr_t last_max = BATADV_DAT_ADDR_MAX, ip_key; struct batadv_dat_candidate *res; struct batadv_dat_entry dat; if (!bat_priv->orig_hash) return NULL; res = kmalloc_array(BATADV_DAT_CANDIDATES_NUM, sizeof(*res), GFP_ATOMIC); if (!res) return NULL; dat.ip = ip_dst; dat.vid = vid; ip_key = (batadv_dat_addr_t)batadv_hash_dat(&dat, BATADV_DAT_ADDR_MAX); batadv_dbg(BATADV_DBG_DAT, bat_priv, "dat_select_candidates(): IP=%pI4 hash(IP)=%u\n", &ip_dst, ip_key); for (select = 0; select < BATADV_DAT_CANDIDATES_NUM; select++) batadv_choose_next_candidate(bat_priv, res, select, ip_key, &last_max); return res; }

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antonio quartulliantonio quartulli12588.65%480.00%
sven eckelmannsven eckelmann1611.35%120.00%
Total141100.00%5100.00%

/** * batadv_dat_send_data - send a payload to the selected candidates * @bat_priv: the bat priv with all the soft interface information * @skb: payload to send * @ip: the DHT key * @vid: VLAN identifier * @packet_subtype: unicast4addr packet subtype to use * * This function copies the skb with pskb_copy() and is sent as unicast packet * to each of the selected candidates. * * Return: 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, unsigned short vid, int packet_subtype) { int i; bool ret = false; int send_status; struct batadv_neigh_node *neigh_node = NULL; struct sk_buff *tmp_skb; struct batadv_dat_candidate *cand; cand = batadv_dat_select_candidates(bat_priv, ip, vid); if (!cand) goto out; batadv_dbg(BATADV_DBG_DAT, bat_priv, "DHT_SEND for %pI4\n", &ip); for (i = 0; i < BATADV_DAT_CANDIDATES_NUM; i++) { if (cand[i].type == BATADV_DAT_CANDIDATE_NOT_FOUND) continue; neigh_node = batadv_orig_router_get(cand[i].orig_node, BATADV_IF_DEFAULT); if (!neigh_node) goto free_orig; tmp_skb = pskb_copy_for_clone(skb, GFP_ATOMIC); if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, tmp_skb, cand[i].orig_node, packet_subtype)) { kfree_skb(tmp_skb); goto free_neigh; } send_status = batadv_send_unicast_skb(tmp_skb, neigh_node); if (send_status == NET_XMIT_SUCCESS) { /* count the sent packet */ switch (packet_subtype) { case BATADV_P_DAT_DHT_GET: batadv_inc_counter(bat_priv, BATADV_CNT_DAT_GET_TX); break; case BATADV_P_DAT_DHT_PUT: batadv_inc_counter(bat_priv, BATADV_CNT_DAT_PUT_TX); break; } /* packet sent to a candidate: return true */ ret = true; } free_neigh: batadv_neigh_node_put(neigh_node); free_orig: batadv_orig_node_put(cand[i].orig_node); } out: kfree(cand); return ret; }

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antonio quartulliantonio quartulli21484.92%440.00%
martin hundebollmartin hundeboll3212.70%220.00%
simon wunderlichsimon wunderlich31.19%110.00%
sven eckelmannsven eckelmann20.79%220.00%
octavian purdilaoctavian purdila10.40%110.00%
Total252100.00%10100.00%

/** * batadv_dat_tvlv_container_update - update the dat tvlv container after dat * setting change * @bat_priv: the bat priv with all the soft interface information */
static void batadv_dat_tvlv_container_update(struct batadv_priv *bat_priv) { char dat_mode; dat_mode = atomic_read(&bat_priv->distributed_arp_table); switch (dat_mode) { case 0: batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1); break; case 1: batadv_tvlv_container_register(bat_priv, BATADV_TVLV_DAT, 1, NULL, 0); break; } }

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marek lindnermarek lindner60100.00%1100.00%
Total60100.00%1100.00%

/** * batadv_dat_status_update - update the dat tvlv container after dat * setting change * @net_dev: the soft interface net device */
void batadv_dat_status_update(struct net_device *net_dev) { struct batadv_priv *bat_priv = netdev_priv(net_dev); batadv_dat_tvlv_container_update(bat_priv); }

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marek lindnermarek lindner25100.00%1100.00%
Total25100.00%1100.00%

/** * batadv_dat_tvlv_ogm_handler_v1 - process incoming dat tvlv container * @bat_priv: the bat priv with all the soft interface information * @orig: the orig_node of the ogm * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) * @tvlv_value: tvlv buffer containing the gateway data * @tvlv_value_len: tvlv buffer length */
static void batadv_dat_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, struct batadv_orig_node *orig, u8 flags, void *tvlv_value, u16 tvlv_value_len) { if (flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) clear_bit(BATADV_ORIG_CAPA_HAS_DAT, &orig->capabilities); else set_bit(BATADV_ORIG_CAPA_HAS_DAT, &orig->capabilities); }

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marek lindnermarek lindner3973.58%133.33%
linus lussinglinus lussing1222.64%133.33%
sven eckelmannsven eckelmann23.77%133.33%
Total53100.00%3100.00%

/** * batadv_dat_hash_free - free the local DAT hash table * @bat_priv: the bat priv with all the soft interface information */
static void batadv_dat_hash_free(struct batadv_priv *bat_priv) { if (!bat_priv->dat.hash) return; __batadv_dat_purge(bat_priv, NULL); batadv_hash_destroy(bat_priv->dat.hash); bat_priv->dat.hash = NULL; }

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antonio quartulliantonio quartulli45100.00%3100.00%
Total45100.00%3100.00%

/** * batadv_dat_init - initialise the DAT internals * @bat_priv: the bat priv with all the soft interface information * * Return: 0 in case of success, a negative error code otherwise */
int batadv_dat_init(struct batadv_priv *bat_priv) { if (bat_priv->dat.hash) return 0; bat_priv->dat.hash = batadv_hash_new(1024); if (!bat_priv->dat.hash) return -ENOMEM; batadv_dat_start_timer(bat_priv); batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1, NULL, BATADV_TVLV_DAT, 1, BATADV_TVLV_HANDLER_OGM_CIFNOTFND); batadv_dat_tvlv_container_update(bat_priv); return 0; }

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PersonTokensPropCommitsCommitProp
antonio quartulliantonio quartulli5372.60%266.67%
marek lindnermarek lindner2027.40%133.33%
Total73100.00%3100.00%

/** * batadv_dat_free - free the DAT internals * @bat_priv: the bat priv with all the soft interface information */
void batadv_dat_free(struct batadv_priv *bat_priv) { batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_DAT, 1); batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_DAT, 1); cancel_delayed_work_sync(&bat_priv->dat.work); batadv_dat_hash_free(bat_priv); }

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PersonTokensPropCommitsCommitProp
antonio quartulliantonio quartulli2558.14%266.67%
marek lindnermarek lindner1841.86%133.33%
Total43100.00%3100.00%

/** * batadv_dat_cache_seq_print_text - print the local DAT hash table * @seq: seq file to print on * @offset: not used * * Return: always 0 */
int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset) { struct net_device *net_dev = (struct net_device *)seq->private; struct batadv_priv *bat_priv = netdev_priv(net_dev); struct batadv_hashtable *hash = bat_priv->dat.hash; struct batadv_dat_entry *dat_entry; struct batadv_hard_iface *primary_if; struct hlist_head *head; unsigned long last_seen_jiffies; int last_seen_msecs, last_seen_secs, last_seen_mins; u32 i; primary_if = batadv_seq_print_text_primary_if_get(seq); if (!primary_if) goto out; seq_printf(seq, "Distributed ARP Table (%s):\n", net_dev->name); seq_puts(seq, " IPv4 MAC VID last-seen\n"); for (i = 0; i < hash->size; i++) { head = &hash->table[i]; rcu_read_lock(); hlist_for_each_entry_rcu(dat_entry, head, hash_entry) { last_seen_jiffies = jiffies - dat_entry->last_update; last_seen_msecs = jiffies_to_msecs