diff options
Diffstat (limited to 'net/batman-adv/soft-interface.c')
-rw-r--r-- | net/batman-adv/soft-interface.c | 240 |
1 files changed, 111 insertions, 129 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 5f05a728f347..0f5c0679b55a 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: +/* Copyright (C) B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich */ @@ -11,6 +11,7 @@ #include <linux/byteorder/generic.h> #include <linux/cache.h> #include <linux/compiler.h> +#include <linux/container_of.h> #include <linux/cpumask.h> #include <linux/errno.h> #include <linux/etherdevice.h> @@ -19,17 +20,15 @@ #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/netlink.h> #include <linux/percpu.h> -#include <linux/printk.h> #include <linux/random.h> #include <linux/rculist.h> #include <linux/rcupdate.h> -#include <linux/rtnetlink.h> #include <linux/skbuff.h> #include <linux/slab.h> #include <linux/socket.h> @@ -37,12 +36,13 @@ #include <linux/stddef.h> #include <linux/string.h> #include <linux/types.h> +#include <net/net_namespace.h> +#include <net/netlink.h> #include <uapi/linux/batadv_packet.h> #include <uapi/linux/batman_adv.h> #include "bat_algo.h" #include "bridge_loop_avoidance.h" -#include "debugfs.h" #include "distributed-arp-table.h" #include "gateway_client.h" #include "hard-interface.h" @@ -50,7 +50,6 @@ #include "network-coding.h" #include "originator.h" #include "send.h" -#include "sysfs.h" #include "translation-table.h" /** @@ -135,7 +134,7 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) return -EADDRNOTAVAIL; ether_addr_copy(old_addr, dev->dev_addr); - ether_addr_copy(dev->dev_addr, addr->sa_data); + eth_hw_addr_set(dev, addr->sa_data); /* only modify transtable if it has been initialized before */ if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) @@ -192,13 +191,14 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb, struct vlan_ethhdr *vhdr; unsigned int header_len = 0; int data_len = skb->len, ret; - unsigned long brd_delay = 1; + unsigned long brd_delay = 0; bool do_bcast = false, client_added; unsigned short vid; u32 seqno; int gw_mode; enum batadv_forw_mode forw_mode = BATADV_FORW_SINGLE; struct batadv_orig_node *mcast_single_orig = NULL; + int mcast_is_routable = 0; int network_offset = ETH_HLEN; __be16 proto; @@ -301,7 +301,8 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb, send: if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) { forw_mode = batadv_mcast_forw_mode(bat_priv, skb, - &mcast_single_orig); + &mcast_single_orig, + &mcast_is_routable); if (forw_mode == BATADV_FORW_NONE) goto dropped; @@ -331,7 +332,7 @@ send: bcast_packet = (struct batadv_bcast_packet *)skb->data; bcast_packet->version = BATADV_COMPAT_VERSION; - bcast_packet->ttl = BATADV_TTL; + bcast_packet->ttl = BATADV_TTL - 1; /* batman packet type: broadcast */ bcast_packet->packet_type = BATADV_BCAST; @@ -347,13 +348,7 @@ send: seqno = atomic_inc_return(&bat_priv->bcast_seqno); bcast_packet->seqno = htonl(seqno); - batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true); - - /* a copy is stored in the bcast list, therefore removing - * the original skb. - */ - consume_skb(skb); - + batadv_send_bcast_packet(bat_priv, skb, brd_delay, true); /* unicast packet */ } else { /* DHCP packets going to a server will use the GW feature */ @@ -363,11 +358,11 @@ send: 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); + ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid, + mcast_single_orig); } else if (forw_mode == BATADV_FORW_SOME) { - ret = batadv_mcast_forw_send(bat_priv, skb, vid); + ret = batadv_mcast_forw_send(bat_priv, skb, vid, + mcast_is_routable); } else { if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb)) @@ -391,10 +386,8 @@ dropped: dropped_freed: batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED); end: - if (mcast_single_orig) - batadv_orig_node_put(mcast_single_orig); - if (primary_if) - batadv_hardif_put(primary_if); + batadv_orig_node_put(mcast_single_orig); + batadv_hardif_put(primary_if); return NETDEV_TX_OK; } @@ -405,7 +398,7 @@ end: * @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. + * Sends an 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. @@ -424,10 +417,10 @@ void batadv_interface_rx(struct net_device *soft_iface, struct vlan_ethhdr *vhdr; struct ethhdr *ethhdr; unsigned short vid; - bool is_bcast; + int packet_type; batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; - is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); + packet_type = batadv_bcast_packet->packet_type; skb_pull_rcsum(skb, hdr_size); skb_reset_mac_header(skb); @@ -470,7 +463,7 @@ void batadv_interface_rx(struct net_device *soft_iface, /* 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)) + if (batadv_bla_rx(bat_priv, skb, vid, packet_type)) goto out; if (orig_node) @@ -509,7 +502,7 @@ out: * after rcu grace period * @ref: kref pointer of the vlan object */ -static void batadv_softif_vlan_release(struct kref *ref) +void batadv_softif_vlan_release(struct kref *ref) { struct batadv_softif_vlan *vlan; @@ -523,19 +516,6 @@ static void batadv_softif_vlan_release(struct kref *ref) } /** - * 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); -} - -/** * 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 @@ -574,7 +554,6 @@ struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) { struct batadv_softif_vlan *vlan; - int err; spin_lock_bh(&bat_priv->softif_vlan_list_lock); @@ -601,19 +580,6 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); spin_unlock_bh(&bat_priv->softif_vlan_list_lock); - /* batadv_sysfs_add_vlan cannot be in the spinlock section due to the - * sleeping behavior of the sysfs functions and the fs_reclaim lock - */ - err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan); - if (err) { - /* ref for the function */ - batadv_softif_vlan_put(vlan); - - /* ref for the list */ - batadv_softif_vlan_put(vlan); - return err; - } - /* add a new TT local entry. This one will be marked with the NOPURGE * flag */ @@ -641,14 +607,13 @@ static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv, 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); } /** * batadv_interface_add_vid() - ndo_add_vid API implementation * @dev: the netdev of the mesh interface - * @proto: protocol of the the vlan id + * @proto: protocol of the vlan id * @vid: identifier of the new vlan * * Set up all the internal structures for handling the new vlan on top of the @@ -661,7 +626,6 @@ static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, { 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 @@ -681,17 +645,6 @@ static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, 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() @@ -706,7 +659,7 @@ static int batadv_interface_add_vid(struct net_device *dev, __be16 proto, /** * batadv_interface_kill_vid() - ndo_kill_vid API implementation * @dev: the netdev of the mesh interface - * @proto: protocol of the the vlan id + * @proto: protocol of the vlan id * @vid: identifier of the deleted vlan * * Destroy all the internal structures used to handle the vlan identified by vid @@ -739,6 +692,36 @@ static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto, return 0; } +/* 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); +} + +/** + * 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); +} + /** * batadv_softif_init_late() - late stage initialization of soft interface * @dev: registered network device to modify @@ -752,6 +735,8 @@ static int batadv_softif_init_late(struct net_device *dev) 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; @@ -813,22 +798,18 @@ static int batadv_softif_init_late(struct net_device *dev) batadv_nc_init_bat_priv(bat_priv); - ret = batadv_algo_select(bat_priv, batadv_routing_algo); - if (ret < 0) - goto free_bat_counters; - - ret = batadv_debugfs_add_meshif(dev); - if (ret < 0) - goto free_bat_counters; + if (!bat_priv->algo_ops) { + ret = batadv_algo_select(bat_priv, batadv_routing_algo); + if (ret < 0) + goto free_bat_counters; + } ret = batadv_mesh_init(dev); if (ret < 0) - goto unreg_debugfs; + goto free_bat_counters; return 0; -unreg_debugfs: - batadv_debugfs_del_meshif(dev); free_bat_counters: free_percpu(bat_priv->bat_counters); bat_priv->bat_counters = NULL; @@ -849,18 +830,16 @@ static int batadv_softif_slave_add(struct net_device *dev, struct netlink_ext_ack *extack) { struct batadv_hard_iface *hard_iface; - struct net *net = dev_net(dev); int ret = -EINVAL; hard_iface = batadv_hardif_get_by_netdev(slave_dev); if (!hard_iface || hard_iface->soft_iface) goto out; - ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); + ret = batadv_hardif_enable_interface(hard_iface, dev); out: - if (hard_iface) - batadv_hardif_put(hard_iface); + batadv_hardif_put(hard_iface); return ret; } @@ -882,12 +861,11 @@ static int batadv_softif_slave_del(struct net_device *dev, if (!hard_iface || hard_iface->soft_iface != dev) goto out; - batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); + batadv_hardif_disable_interface(hard_iface); ret = 0; out: - if (hard_iface) - batadv_hardif_put(hard_iface); + batadv_hardif_put(hard_iface); return ret; } @@ -1005,7 +983,6 @@ static const struct ethtool_ops batadv_ethtool_ops = { */ static void batadv_softif_free(struct net_device *dev) { - batadv_debugfs_del_meshif(dev); batadv_mesh_free(dev); /* some scheduled RCU callbacks need the bat_priv struct to accomplish @@ -1042,57 +1019,56 @@ static void batadv_softif_init_early(struct net_device *dev) } /** - * batadv_softif_create() - Create and register soft interface - * @net: the applicable net namespace - * @name: name of the new soft interface + * batadv_softif_validate() - validate configuration of new batadv link + * @tb: IFLA_INFO_DATA netlink attributes + * @data: enum batadv_ifla_attrs attributes + * @extack: extended ACK report struct * - * Return: newly allocated soft_interface, NULL on errors + * Return: 0 if successful or error otherwise. */ -struct net_device *batadv_softif_create(struct net *net, const char *name) +static int batadv_softif_validate(struct nlattr *tb[], struct nlattr *data[], + struct netlink_ext_ack *extack) { - struct net_device *soft_iface; - int ret; + struct batadv_algo_ops *algo_ops; - soft_iface = alloc_netdev(sizeof(struct batadv_priv), name, - NET_NAME_UNKNOWN, batadv_softif_init_early); - if (!soft_iface) - return NULL; - - dev_net_set(soft_iface, net); - - soft_iface->rtnl_link_ops = &batadv_link_ops; + if (!data) + return 0; - ret = register_netdevice(soft_iface); - if (ret < 0) { - pr_err("Unable to register the batman interface '%s': %i\n", - name, ret); - free_netdev(soft_iface); - return NULL; + if (data[IFLA_BATADV_ALGO_NAME]) { + algo_ops = batadv_algo_get(nla_data(data[IFLA_BATADV_ALGO_NAME])); + if (!algo_ops) + return -EINVAL; } - return soft_iface; + return 0; } /** - * batadv_softif_destroy_sysfs() - deletion of batadv_soft_interface via sysfs - * @soft_iface: the to-be-removed batman-adv interface + * batadv_softif_newlink() - pre-initialize and register new batadv link + * @src_net: the applicable net namespace + * @dev: network device to register + * @tb: IFLA_INFO_DATA netlink attributes + * @data: enum batadv_ifla_attrs attributes + * @extack: extended ACK report struct + * + * Return: 0 if successful or error otherwise. */ -void batadv_softif_destroy_sysfs(struct net_device *soft_iface) +static int batadv_softif_newlink(struct net *src_net, struct net_device *dev, + struct nlattr *tb[], struct nlattr *data[], + struct netlink_ext_ack *extack) { - struct batadv_priv *bat_priv = netdev_priv(soft_iface); - struct batadv_softif_vlan *vlan; - - ASSERT_RTNL(); + struct batadv_priv *bat_priv = netdev_priv(dev); + const char *algo_name; + int err; - /* 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); + if (data && data[IFLA_BATADV_ALGO_NAME]) { + algo_name = nla_data(data[IFLA_BATADV_ALGO_NAME]); + err = batadv_algo_select(bat_priv, algo_name); + if (err) + return -EINVAL; } - batadv_sysfs_del_meshif(soft_iface); - unregister_netdevice(soft_iface); + return register_netdevice(dev); } /** @@ -1110,8 +1086,7 @@ static void batadv_softif_destroy_netlink(struct net_device *soft_iface, list_for_each_entry(hard_iface, &batadv_hardif_list, list) { if (hard_iface->soft_iface == soft_iface) - batadv_hardif_disable_interface(hard_iface, - BATADV_IF_CLEANUP_KEEP); + batadv_hardif_disable_interface(hard_iface); } /* destroy the "untagged" VLAN */ @@ -1121,7 +1096,6 @@ static void batadv_softif_destroy_netlink(struct net_device *soft_iface, batadv_softif_vlan_put(vlan); } - batadv_sysfs_del_meshif(soft_iface); unregister_netdevice_queue(soft_iface, head); } @@ -1139,9 +1113,17 @@ bool batadv_softif_is_valid(const struct net_device *net_dev) return false; } +static const struct nla_policy batadv_ifla_policy[IFLA_BATADV_MAX + 1] = { + [IFLA_BATADV_ALGO_NAME] = { .type = NLA_NUL_STRING }, +}; + struct rtnl_link_ops batadv_link_ops __read_mostly = { .kind = "batadv", .priv_size = sizeof(struct batadv_priv), .setup = batadv_softif_init_early, + .maxtype = IFLA_BATADV_MAX, + .policy = batadv_ifla_policy, + .validate = batadv_softif_validate, + .newlink = batadv_softif_newlink, .dellink = batadv_softif_destroy_netlink, }; |