cregit-Linux how code gets into the kernel

Release 4.8 net/batman-adv/soft-interface.c

Directory: net/batman-adv
/* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * 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 "soft-interface.h"
#include "main.h"

#include <linux/atomic.h>
#include <linux/byteorder/generic.h>
#include <linux/cache.h>
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/fs.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/percpu.h>
#include <linux/printk.h>
#include <linux/random.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include "bat_algo.h"
#include "bridge_loop_avoidance.h"
#include "debugfs.h"
#include "distributed-arp-table.h"
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
#include "multicast.h"
#include "network-coding.h"
#include "packet.h"
#include "send.h"
#include "sysfs.h"
#include "translation-table.h"

static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
static void batadv_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info);
static u32 batadv_get_msglevel(struct net_device *dev);
static void batadv_set_msglevel(struct net_device *dev, u32 value);
static u32 batadv_get_link(struct net_device *dev);
static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
static void batadv_get_ethtool_stats(struct net_device *dev,
				     struct ethtool_stats *stats, u64 *data);
static int batadv_get_sset_count(struct net_device *dev, int stringset);


static const struct ethtool_ops batadv_ethtool_ops = {
	.get_settings = batadv_get_settings,
	.get_drvinfo = batadv_get_drvinfo,
	.get_msglevel = batadv_get_msglevel,
	.set_msglevel = batadv_set_msglevel,
	.get_link = batadv_get_link,
	.get_strings = batadv_get_strings,
	.get_ethtool_stats = batadv_get_ethtool_stats,
	.get_sset_count = batadv_get_sset_count,
};


int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) { int result; /* TODO: We must check if we can release all references to non-payload * data using skb_header_release in our skbs to allow skb_cow_header to * work optimally. This means that those skbs are not allowed to read * or write any data which is before the current position of skb->data * after that call and thus allow other skbs with the same data buffer * to write freely in that area. */ result = skb_cow_head(skb, len); if (result < 0) return result; skb_push(skb, len); return 0; }

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sven eckelmannsven eckelmann46100.00%3100.00%
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static int batadv_interface_open(struct net_device *dev) { netif_start_queue(dev); return 0; }

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sven eckelmannsven eckelmann19100.00%2100.00%
Total19100.00%2100.00%


static int batadv_interface_release(struct net_device *dev) { netif_stop_queue(dev); return 0; }

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sven eckelmannsven eckelmann19100.00%2100.00%
Total19100.00%2100.00%


static struct net_device_stats *batadv_interface_stats(struct net_device *dev) { struct batadv_priv *bat_priv = netdev_priv(dev); struct net_device_stats *stats = &bat_priv->stats; stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX); stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES); stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED); stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX); stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES); return stats; }

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marek lindnermarek lindner6369.23%125.00%
sven eckelmannsven eckelmann2830.77%375.00%
Total91100.00%4100.00%


static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; struct sockaddr *addr = p; u8 old_addr[ETH_ALEN]; if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; ether_addr_copy(old_addr, dev->dev_addr); ether_addr_copy(dev->dev_addr, addr->sa_data); /* only modify transtable if it has been initialized before */ if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) return 0; rcu_read_lock(); hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { batadv_tt_local_remove(bat_priv, old_addr, vlan->vid, "mac address changed", false); batadv_tt_local_add(dev, addr->sa_data, vlan->vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); } rcu_read_unlock(); return 0; }

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sven eckelmannsven eckelmann8156.25%746.67%
antonio quartulliantonio quartulli3927.08%746.67%
defdef2416.67%16.67%
Total144100.00%15100.00%


static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) { /* check ranges */ if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) return -EINVAL; dev->mtu = new_mtu; return 0; }

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sven eckelmannsven eckelmann45100.00%3100.00%
Total45100.00%3100.00%

/** * batadv_interface_set_rx_mode - set the rx mode of a device * @dev: registered network device to modify * * We do not actually need to set any rx filters for the virtual batman * soft interface. However a dummy handler enables a user to set static * multicast listeners for instance. */
static void batadv_interface_set_rx_mode(struct net_device *dev) { }

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linus lussinglinus lussing10100.00%1100.00%
Total10100.00%1100.00%


static int batadv_interface_tx(struct sk_buff *skb, struct net_device *soft_iface) { struct ethhdr *ethhdr; struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *primary_if = NULL; struct batadv_bcast_packet *bcast_packet; static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x00}; static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, 0x00, 0x00}; enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO; u8 *dst_hint = NULL, chaddr[ETH_ALEN]; struct vlan_ethhdr *vhdr; unsigned int header_len = 0; int data_len = skb->len, ret; unsigned long brd_delay = 1; bool do_bcast = false, client_added; unsigned short vid; u32 seqno; int gw_mode; enum batadv_forw_mode forw_mode; struct batadv_orig_node *mcast_single_orig = NULL; int network_offset = ETH_HLEN; if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; netif_trans_update(soft_iface); vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { case ETH_P_8021Q: vhdr = vlan_eth_hdr(skb); /* drop batman-in-batman packets to prevent loops */ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { network_offset += VLAN_HLEN; break; } /* fall through */ case ETH_P_BATMAN: goto dropped; } skb_set_network_header(skb, network_offset); if (batadv_bla_tx(bat_priv, skb, vid)) goto dropped; /* skb->data might have been reallocated by batadv_bla_tx() */ ethhdr = eth_hdr(skb); /* Register the client MAC in the transtable */ if (!is_multicast_ether_addr(ethhdr->h_source)) { client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source, vid, skb->skb_iif, skb->mark); if (!client_added) goto dropped; } /* don't accept stp packets. STP does not help in meshes. * better use the bridge loop avoidance ... * * The same goes for ECTP sent at least by some Cisco Switches, * it might confuse the mesh when used with bridge loop avoidance. */ if (batadv_compare_eth(ethhdr->h_dest, stp_addr)) goto dropped; if (batadv_compare_eth(ethhdr->h_dest, ectp_addr)) goto dropped; gw_mode = atomic_read(&bat_priv->gw.mode); if (is_multicast_ether_addr(ethhdr->h_dest)) { /* if gw mode is off, broadcast every packet */ if (gw_mode == BATADV_GW_MODE_OFF) { do_bcast = true; goto send; } dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len, chaddr); /* skb->data may have been modified by * batadv_gw_dhcp_recipient_get() */ ethhdr = eth_hdr(skb); /* if gw_mode is on, broadcast any non-DHCP message. * All the DHCP packets are going to be sent as unicast */ if (dhcp_rcp == BATADV_DHCP_NO) { do_bcast = true; goto send; } if (dhcp_rcp == BATADV_DHCP_TO_CLIENT) dst_hint = chaddr; else if ((gw_mode == BATADV_GW_MODE_SERVER) && (dhcp_rcp == BATADV_DHCP_TO_SERVER)) /* gateways should not forward any DHCP message if * directed to a DHCP server */ goto dropped; send: if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { forw_mode = batadv_mcast_forw_mode(bat_priv, skb, &mcast_single_orig); if (forw_mode == BATADV_FORW_NONE) goto dropped; if (forw_mode == BATADV_FORW_SINGLE) do_bcast = false; } } batadv_skb_set_priority(skb, 0); /* ethernet packet should be broadcasted */ if (do_bcast) { primary_if = batadv_primary_if_get_selected(bat_priv); if (!primary_if) goto dropped; /* in case of ARP request, we do not immediately broadcasti the * packet, instead we first wait for DAT to try to retrieve the * correct ARP entry */ if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) brd_delay = msecs_to_jiffies(ARP_REQ_DELAY); if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0) goto dropped; bcast_packet = (struct batadv_bcast_packet *)skb->data; bcast_packet->version = BATADV_COMPAT_VERSION; bcast_packet->ttl = BATADV_TTL; /* batman packet type: broadcast */ bcast_packet->packet_type = BATADV_BCAST; bcast_packet->reserved = 0; /* hw address of first interface is the orig mac because only * this mac is known throughout the mesh */ ether_addr_copy(bcast_packet->orig, primary_if->net_dev->dev_addr); /* set broadcast sequence number */ seqno = atomic_inc_return(&bat_priv->bcast_seqno); bcast_packet->seqno = htonl(seqno); batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay); /* a copy is stored in the bcast list, therefore removing * the original skb. */ kfree_skb(skb); /* unicast packet */ } else { /* DHCP packets going to a server will use the GW feature */ if (dhcp_rcp == BATADV_DHCP_TO_SERVER) { ret = batadv_gw_out_of_range(bat_priv, skb); if (ret) goto dropped; ret = batadv_send_skb_via_gw(bat_priv, skb, vid); } else if (mcast_single_orig) { ret = batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, mcast_single_orig, vid); } else { if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) goto dropped; batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb); ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint, vid); } if (ret == NET_XMIT_DROP) goto dropped_freed; } batadv_inc_counter(bat_priv, BATADV_CNT_TX); batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len); goto end; dropped: kfree_skb(skb); dropped_freed: batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); end: if (primary_if) batadv_hardif_put(primary_if); return NETDEV_TX_OK; }

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sven eckelmannsven eckelmann28535.49%2240.00%
antonio quartulliantonio quartulli19724.53%1527.27%
linus lussinglinus lussing13116.31%610.91%
marek lindnermarek lindner9411.71%59.09%
simon wunderlichsimon wunderlich9311.58%610.91%
florian westphalflorian westphal30.37%11.82%
Total803100.00%55100.00%

/** * batadv_interface_rx - receive ethernet frame on local batman-adv interface * @soft_iface: local interface which will receive the ethernet frame * @skb: ethernet frame for @soft_iface * @hdr_size: size of already parsed batman-adv header * @orig_node: originator from which the batman-adv packet was sent * * Sends a ethernet frame to the receive path of the local @soft_iface. * skb->data has still point to the batman-adv header with the size @hdr_size. * The caller has to have parsed this header already and made sure that at least * @hdr_size bytes are still available for pull in @skb. * * The packet may still get dropped. This can happen when the encapsulated * ethernet frame is invalid or contains again an batman-adv packet. Also * unicast packets will be dropped directly when it was sent between two * isolated clients. */
void batadv_interface_rx(struct net_device *soft_iface, struct sk_buff *skb, int hdr_size, struct batadv_orig_node *orig_node) { struct batadv_bcast_packet *batadv_bcast_packet; struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct vlan_ethhdr *vhdr; struct ethhdr *ethhdr; unsigned short vid; bool is_bcast; batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); skb_pull_rcsum(skb, hdr_size); skb_reset_mac_header(skb); /* clean the netfilter state now that the batman-adv header has been * removed */ nf_reset(skb); if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) goto dropped; vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); switch (ntohs(ethhdr->h_proto)) { case ETH_P_8021Q: if (!pskb_may_pull(skb, VLAN_ETH_HLEN)) goto dropped; vhdr = (struct vlan_ethhdr *)skb->data; /* drop batman-in-batman packets to prevent loops */ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) break; /* fall through */ case ETH_P_BATMAN: goto dropped; } /* skb->dev & skb->pkt_type are set here */ skb->protocol = eth_type_trans(skb, soft_iface); /* should not be necessary anymore as we use skb_pull_rcsum() * TODO: please verify this and remove this TODO * -- Dec 21st 2009, Simon Wunderlich */ /* skb->ip_summed = CHECKSUM_UNNECESSARY; */ batadv_inc_counter(bat_priv, BATADV_CNT_RX); batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN); soft_iface->last_rx = jiffies; /* Let the bridge loop avoidance check the packet. If will * not handle it, we can safely push it up. */ if (batadv_bla_rx(bat_priv, skb, vid, is_bcast)) goto out; if (orig_node) batadv_tt_add_temporary_global_entry(bat_priv, orig_node, ethhdr->h_source, vid); if (is_multicast_ether_addr(ethhdr->h_dest)) { /* set the mark on broadcast packets if AP isolation is ON and * the packet is coming from an "isolated" client */ if (batadv_vlan_ap_isola_get(bat_priv, vid) && batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source, vid)) { /* save bits in skb->mark not covered by the mask and * apply the mark on the rest */ skb->mark &= ~bat_priv->isolation_mark_mask; skb->mark |= bat_priv->isolation_mark; } } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest, vid)) { goto dropped; } netif_rx(skb); goto out; dropped: kfree_skb(skb); out: return; }

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antonio quartulliantonio quartulli15343.59%1150.00%
sven eckelmannsven eckelmann15143.02%522.73%
simon wunderlichsimon wunderlich308.55%313.64%
marek lindnermarek lindner164.56%29.09%
david s. millerdavid s. miller10.28%14.55%
Total351100.00%22100.00%

/** * batadv_softif_vlan_release - release vlan from lists and queue for free after * rcu grace period * @ref: kref pointer of the vlan object */
static void batadv_softif_vlan_release(struct kref *ref) { struct batadv_softif_vlan *vlan; vlan = container_of(ref, struct batadv_softif_vlan, refcount); spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock); hlist_del_rcu(&vlan->list); spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock); kfree_rcu(vlan, rcu); }

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antonio quartulliantonio quartulli4571.43%250.00%
sven eckelmannsven eckelmann1726.98%125.00%
marek lindnermarek lindner11.59%125.00%
Total63100.00%4100.00%

/** * batadv_softif_vlan_put - decrease the vlan object refcounter and * possibly release it * @vlan: the vlan object to release */
void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan) { if (!vlan) return; kref_put(&vlan->refcount, batadv_softif_vlan_release); }

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sven eckelmannsven eckelmann2596.15%266.67%
antonio quartulliantonio quartulli13.85%133.33%
Total26100.00%3100.00%

/** * batadv_softif_vlan_get - get the vlan object for a specific vid * @bat_priv: the bat priv with all the soft interface information * @vid: the identifier of the vlan object to retrieve * * Return: the private data of the vlan matching the vid passed as argument or * NULL otherwise. The refcounter of the returned object is incremented by 1. */
struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, unsigned short vid) { struct batadv_softif_vlan *vlan_tmp, *vlan = NULL; rcu_read_lock(); hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) { if (vlan_tmp->vid != vid) continue; if (!kref_get_unless_zero(&vlan_tmp->refcount)) continue; vlan = vlan_tmp; break; } rcu_read_unlock(); return vlan; }

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antonio quartulliantonio quartulli7098.59%150.00%
sven eckelmannsven eckelmann11.41%150.00%
Total71100.00%2100.00%

/** * batadv_softif_create_vlan - allocate the needed resources for a new vlan * @bat_priv: the bat priv with all the soft interface information * @vid: the VLAN identifier * * Return: 0 on success, a negative error otherwise. */
int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) { struct batadv_softif_vlan *vlan; int err; vlan = batadv_softif_vlan_get(bat_priv, vid); if (vlan) { batadv_softif_vlan_put(vlan); return -EEXIST; } vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); if (!vlan) return -ENOMEM; vlan->bat_priv = bat_priv; vlan->vid = vid; kref_init(&vlan->refcount); atomic_set(&vlan->ap_isolation, 0); err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); if (err) { kfree(vlan); return err; } spin_lock_bh(&bat_priv->softif_vlan_list_lock); hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); spin_unlock_bh(&bat_priv->softif_vlan_list_lock); /* add a new TT local entry. This one will be marked with the NOPURGE * flag */ batadv_tt_local_add(bat_priv->soft_iface, bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); return 0; }

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antonio quartulliantonio quartulli17398.86%466.67%
sven eckelmannsven eckelmann21.14%233.33%
Total175100.00%6100.00%

/** * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object * @bat_priv: the bat priv with all the soft interface information * @vlan: the object to remove */
static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, struct batadv_softif_vlan *vlan) { /* explicitly remove the associated TT local entry because it is marked * with the NOPURGE flag */ batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr, vlan->vid, "vlan interface destroyed", false); batadv_sysfs_del_vlan(bat_priv, vlan); batadv_softif_vlan_put(vlan); }

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antonio quartulliantonio quartulli4797.92%266.67%
sven eckelmannsven eckelmann12.08%133.33%
Total48100.00%3100.00%

/** * batadv_interface_add_vid - ndo_add_vid API implementation * @dev: the netdev of the mesh interface * @proto: protocol of the the vlan id * @vid: identifier of the new vlan * * Set up all the internal structures for handling the new vlan on top of the * mesh interface * * Return: 0 on success or a negative error code in case of failure. */
static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, unsigned short vid) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; int ret; /* only 802.1Q vlans are supported. * batman-adv does not know how to handle other types */ if (proto != htons(ETH_P_8021Q)) return -EINVAL; vid |= BATADV_VLAN_HAS_TAG; /* if a new vlan is getting created and it already exists, it means that * it was not deleted yet. batadv_softif_vlan_get() increases the * refcount in order to revive the object. * * if it does not exist then create it. */ vlan = batadv_softif_vlan_get(bat_priv, vid); if (!vlan) return batadv_softif_create_vlan(bat_priv, vid); /* recreate the sysfs object if it was already destroyed (and it should * be since we received a kill_vid() for this vlan */ if (!vlan->kobj) { ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); if (ret) { batadv_softif_vlan_put(vlan); return ret; } } /* add a new TT local entry. This one will be marked with the NOPURGE * flag. This must be added again, even if the vlan object already * exists, because the entry was deleted by kill_vid() */ batadv_tt_local_add(bat_priv->soft_iface, bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); return 0; }

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antonio quartulliantonio quartulli13499.26%266.67%
sven eckelmannsven eckelmann10.74%133.33%
Total135100.00%3100.00%

/** * batadv_interface_kill_vid - ndo_kill_vid API implementation * @dev: the netdev of the mesh interface * @proto: protocol of the the vlan id * @vid: identifier of the deleted vlan * * Destroy all the internal structures used to handle the vlan identified by vid * on top of the mesh interface * * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q * or -ENOENT if the specified vlan id wasn't registered. */
static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, unsigned short vid) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_softif_vlan *vlan; /* only 802.1Q vlans are supported. batman-adv does not know how to * handle other types */ if (proto != htons(ETH_P_8021Q)) return -EINVAL; vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG); if (!vlan) return -ENOENT; batadv_softif_destroy_vlan(bat_priv, vlan); /* finally free the vlan object */ batadv_softif_vlan_put(vlan); return 0; }

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antonio quartulliantonio quartulli8298.80%150.00%
sven eckelmannsven eckelmann11.20%150.00%
Total83100.00%2100.00%

/* batman-adv network devices have devices nesting below it and are a special * "super class" of normal network devices; split their locks off into a * separate class since they always nest. */ static struct lock_class_key batadv_netdev_xmit_lock_key; static struct lock_class_key batadv_netdev_addr_lock_key; /** * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue * @dev: device which owns the tx queue * @txq: tx queue to modify * @_unused: always NULL */
static void batadv_set_lockdep_class_one(struct net_device *dev, struct netdev_queue *txq, void *_unused) { lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key); }

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sven eckelmannsven eckelmann31100.00%1100.00%
Total31100.00%1100.00%

/** * batadv_set_lockdep_class - Set txq and addr_list lockdep class * @dev: network device to modify */
static void batadv_set_lockdep_class(struct net_device *dev) { lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key); netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL); }

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sven eckelmannsven eckelmann31100.00%1100.00%
Total31100.00%1100.00%

/** * batadv_softif_destroy_finish - cleans up the remains of a softif * @work: work queue item * * Free the parts of the soft interface which can not be removed under * rtnl lock (to prevent deadlock situations). */
static void batadv_softif_destroy_finish(struct work_struct *work) { struct batadv_softif_vlan *vlan; struct batadv_priv *bat_priv; struct net_device *soft_iface; bat_priv = container_of(work, struct batadv_priv, cleanup_work); soft_iface = bat_priv->soft_iface; /* 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_netdev(soft_iface); }

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simon wunderlichsimon wunderlich4858.54%125.00%
antonio quartulliantonio quartulli3239.02%125.00%
sven eckelmannsven eckelmann11.22%125.00%
marek lindnermarek lindner11.22%125.00%
Total82100.00%4100.00%

/** * batadv_softif_init_late - late stage initialization of soft interface * @dev: registered network device to modify * * Return: error code on failures */
static int batadv_softif_init_late(struct net_device *dev) { struct batadv_priv *bat_priv; u32 random_seqno; int ret; size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; batadv_set_lockdep_class(dev); bat_priv = netdev_priv(dev); bat_priv->soft_iface = dev; INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish); /* batadv_interface_stats() needs to be available as soon as * register_netdevice() has been called */ bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64)); if (!bat_priv->bat_counters) return -ENOMEM; atomic_set(&bat_priv->aggregated_ogms, 1); atomic_set(&bat_priv->bonding, 0); #ifdef CONFIG_BATMAN_ADV_BLA atomic_set(&bat_priv->bridge_loop_avoidance, 1); #endif #ifdef CONFIG_BATMAN_ADV_DAT atomic_set(&bat_priv->distributed_arp_table, 1); #endif #ifdef CONFIG_BATMAN_ADV_MCAST bat_priv->mcast.querier_ipv4.exists = false; bat_priv->mcast.querier_ipv4.shadowing = false; bat_priv->mcast.querier_ipv6.exists = false; bat_priv->mcast.querier_ipv6.shadowing = false; bat_priv->mcast.flags = BATADV_NO_FLAGS; atomic_set(&bat_priv->multicast_mode, 1); atomic_set(&bat_priv->mcast.num_disabled, 0); atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); #endif atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF); atomic_set(&bat_priv->gw.sel_class,