| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* Copyright (C) 2007-2018 B.A.T.M.A.N. contributors: |
| 3 | * |
| 4 | * Marek Lindner, Simon Wunderlich |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of version 2 of the GNU General Public |
| 8 | * License as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ |
| 20 | #define _NET_BATMAN_ADV_HARD_INTERFACE_H_ |
| 21 | |
| 22 | #include "main.h" |
| 23 | |
| 24 | #include <linux/compiler.h> |
| 25 | #include <linux/kref.h> |
| 26 | #include <linux/notifier.h> |
| 27 | #include <linux/rcupdate.h> |
| 28 | #include <linux/stddef.h> |
| 29 | #include <linux/types.h> |
| 30 | |
| 31 | struct net_device; |
| 32 | struct net; |
| 33 | |
| 34 | /** |
| 35 | * enum batadv_hard_if_state - State of a hard interface |
| 36 | */ |
| 37 | enum batadv_hard_if_state { |
| 38 | /** |
| 39 | * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a |
| 40 | * batman-adv soft interface |
| 41 | */ |
| 42 | BATADV_IF_NOT_IN_USE, |
| 43 | |
| 44 | /** |
| 45 | * @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft |
| 46 | * interface |
| 47 | */ |
| 48 | BATADV_IF_TO_BE_REMOVED, |
| 49 | |
| 50 | /** @BATADV_IF_INACTIVE: interface is deactivated */ |
| 51 | BATADV_IF_INACTIVE, |
| 52 | |
| 53 | /** @BATADV_IF_ACTIVE: interface is used */ |
| 54 | BATADV_IF_ACTIVE, |
| 55 | |
| 56 | /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */ |
| 57 | BATADV_IF_TO_BE_ACTIVATED, |
| 58 | |
| 59 | /** |
| 60 | * @BATADV_IF_I_WANT_YOU: interface is queued up (using sysfs) for being |
| 61 | * added as slave interface of a batman-adv soft interface |
| 62 | */ |
| 63 | BATADV_IF_I_WANT_YOU, |
| 64 | }; |
| 65 | |
| 66 | /** |
| 67 | * enum batadv_hard_if_bcast - broadcast avoidance options |
| 68 | */ |
| 69 | enum batadv_hard_if_bcast { |
| 70 | /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */ |
| 71 | BATADV_HARDIF_BCAST_OK = 0, |
| 72 | |
| 73 | /** |
| 74 | * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no |
| 75 | * recipient |
| 76 | */ |
| 77 | BATADV_HARDIF_BCAST_NORECIPIENT, |
| 78 | |
| 79 | /** |
| 80 | * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it |
| 81 | * from |
| 82 | */ |
| 83 | BATADV_HARDIF_BCAST_DUPFWD, |
| 84 | |
| 85 | /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */ |
| 86 | BATADV_HARDIF_BCAST_DUPORIG, |
| 87 | }; |
| 88 | |
| 89 | /** |
| 90 | * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal |
| 91 | */ |
| 92 | enum batadv_hard_if_cleanup { |
| 93 | /** |
| 94 | * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface |
| 95 | */ |
| 96 | BATADV_IF_CLEANUP_KEEP, |
| 97 | |
| 98 | /** |
| 99 | * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was |
| 100 | * removed |
| 101 | */ |
| 102 | BATADV_IF_CLEANUP_AUTO, |
| 103 | }; |
| 104 | |
| 105 | extern struct notifier_block batadv_hard_if_notifier; |
| 106 | |
| 107 | struct net_device *batadv_get_real_netdev(struct net_device *net_device); |
| 108 | bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface); |
| 109 | bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); |
| 110 | struct batadv_hard_iface* |
| 111 | batadv_hardif_get_by_netdev(const struct net_device *net_dev); |
| 112 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
| 113 | struct net *net, const char *iface_name); |
| 114 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, |
| 115 | enum batadv_hard_if_cleanup autodel); |
| 116 | void batadv_hardif_remove_interfaces(void); |
| 117 | int batadv_hardif_min_mtu(struct net_device *soft_iface); |
| 118 | void batadv_update_min_mtu(struct net_device *soft_iface); |
| 119 | void batadv_hardif_release(struct kref *ref); |
| 120 | int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, |
| 121 | u8 *orig_addr, u8 *orig_neigh); |
| 122 | |
| 123 | /** |
| 124 | * batadv_hardif_put() - decrement the hard interface refcounter and possibly |
| 125 | * release it |
| 126 | * @hard_iface: the hard interface to free |
| 127 | */ |
| 128 | static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) |
| 129 | { |
| 130 | kref_put(&hard_iface->refcount, batadv_hardif_release); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * batadv_primary_if_get_selected() - Get reference to primary interface |
| 135 | * @bat_priv: the bat priv with all the soft interface information |
| 136 | * |
| 137 | * Return: primary interface (with increased refcnt), otherwise NULL |
| 138 | */ |
| 139 | static inline struct batadv_hard_iface * |
| 140 | batadv_primary_if_get_selected(struct batadv_priv *bat_priv) |
| 141 | { |
| 142 | struct batadv_hard_iface *hard_iface; |
| 143 | |
| 144 | rcu_read_lock(); |
| 145 | hard_iface = rcu_dereference(bat_priv->primary_if); |
| 146 | if (!hard_iface) |
| 147 | goto out; |
| 148 | |
| 149 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
| 150 | hard_iface = NULL; |
| 151 | |
| 152 | out: |
| 153 | rcu_read_unlock(); |
| 154 | return hard_iface; |
| 155 | } |
| 156 | |
| 157 | #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ |