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- // SPDX-License-Identifier: GPL-2.0
- /* Copyright (C) 2016-2020 B.A.T.M.A.N. contributors:
- *
- * Matthias Schiffer
- */
- #include "netlink.h"
- #include "main.h"
- #include <linux/atomic.h>
- #include <linux/bitops.h>
- #include <linux/bug.h>
- #include <linux/byteorder/generic.h>
- #include <linux/cache.h>
- #include <linux/err.h>
- #include <linux/errno.h>
- #include <linux/export.h>
- #include <linux/genetlink.h>
- #include <linux/gfp.h>
- #include <linux/if_ether.h>
- #include <linux/if_vlan.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/limits.h>
- #include <linux/list.h>
- #include <linux/netdevice.h>
- #include <linux/netlink.h>
- #include <linux/printk.h>
- #include <linux/rtnetlink.h>
- #include <linux/skbuff.h>
- #include <linux/stddef.h>
- #include <linux/types.h>
- #include <net/genetlink.h>
- #include <net/net_namespace.h>
- #include <net/netlink.h>
- #include <net/sock.h>
- #include <uapi/linux/batadv_packet.h>
- #include <uapi/linux/batman_adv.h>
- #include "bat_algo.h"
- #include "bridge_loop_avoidance.h"
- #include "distributed-arp-table.h"
- #include "gateway_client.h"
- #include "gateway_common.h"
- #include "hard-interface.h"
- #include "log.h"
- #include "multicast.h"
- #include "network-coding.h"
- #include "originator.h"
- #include "soft-interface.h"
- #include "tp_meter.h"
- #include "translation-table.h"
- struct genl_family batadv_netlink_family;
- /* multicast groups */
- enum batadv_netlink_multicast_groups {
- BATADV_NL_MCGRP_CONFIG,
- BATADV_NL_MCGRP_TPMETER,
- };
- /**
- * enum batadv_genl_ops_flags - flags for genl_ops's internal_flags
- */
- enum batadv_genl_ops_flags {
- /**
- * @BATADV_FLAG_NEED_MESH: request requires valid soft interface in
- * attribute BATADV_ATTR_MESH_IFINDEX and expects a pointer to it to be
- * saved in info->user_ptr[0]
- */
- BATADV_FLAG_NEED_MESH = BIT(0),
- /**
- * @BATADV_FLAG_NEED_HARDIF: request requires valid hard interface in
- * attribute BATADV_ATTR_HARD_IFINDEX and expects a pointer to it to be
- * saved in info->user_ptr[1]
- */
- BATADV_FLAG_NEED_HARDIF = BIT(1),
- /**
- * @BATADV_FLAG_NEED_VLAN: request requires valid vlan in
- * attribute BATADV_ATTR_VLANID and expects a pointer to it to be
- * saved in info->user_ptr[1]
- */
- BATADV_FLAG_NEED_VLAN = BIT(2),
- };
- static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
- [BATADV_NL_MCGRP_CONFIG] = { .name = BATADV_NL_MCAST_GROUP_CONFIG },
- [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
- };
- static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
- [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
- [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
- [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
- [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
- [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
- [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
- [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
- [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
- [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
- [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
- [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
- [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
- [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
- [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
- [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
- [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
- [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
- [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
- [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_TQ] = { .type = NLA_U8 },
- [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
- [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
- [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
- [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
- [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
- [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
- [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
- [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
- [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
- [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
- [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
- [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
- [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
- [BATADV_ATTR_VLANID] = { .type = NLA_U16 },
- [BATADV_ATTR_AGGREGATED_OGMS_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_AP_ISOLATION_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_ISOLATION_MARK] = { .type = NLA_U32 },
- [BATADV_ATTR_ISOLATION_MASK] = { .type = NLA_U32 },
- [BATADV_ATTR_BONDING_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_FRAGMENTATION_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_GW_BANDWIDTH_DOWN] = { .type = NLA_U32 },
- [BATADV_ATTR_GW_BANDWIDTH_UP] = { .type = NLA_U32 },
- [BATADV_ATTR_GW_MODE] = { .type = NLA_U8 },
- [BATADV_ATTR_GW_SEL_CLASS] = { .type = NLA_U32 },
- [BATADV_ATTR_HOP_PENALTY] = { .type = NLA_U8 },
- [BATADV_ATTR_LOG_LEVEL] = { .type = NLA_U32 },
- [BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_MULTICAST_FANOUT] = { .type = NLA_U32 },
- [BATADV_ATTR_NETWORK_CODING_ENABLED] = { .type = NLA_U8 },
- [BATADV_ATTR_ORIG_INTERVAL] = { .type = NLA_U32 },
- [BATADV_ATTR_ELP_INTERVAL] = { .type = NLA_U32 },
- [BATADV_ATTR_THROUGHPUT_OVERRIDE] = { .type = NLA_U32 },
- };
- /**
- * batadv_netlink_get_ifindex() - Extract an interface index from a message
- * @nlh: Message header
- * @attrtype: Attribute which holds an interface index
- *
- * Return: interface index, or 0.
- */
- int
- batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
- {
- struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
- return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
- }
- /**
- * batadv_netlink_mesh_fill_ap_isolation() - Add ap_isolation softif attribute
- * @msg: Netlink message to dump into
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_mesh_fill_ap_isolation(struct sk_buff *msg,
- struct batadv_priv *bat_priv)
- {
- struct batadv_softif_vlan *vlan;
- u8 ap_isolation;
- vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
- if (!vlan)
- return 0;
- ap_isolation = atomic_read(&vlan->ap_isolation);
- batadv_softif_vlan_put(vlan);
- return nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
- !!ap_isolation);
- }
- /**
- * batadv_option_set_ap_isolation() - Set ap_isolation from genl msg
- * @attr: parsed BATADV_ATTR_AP_ISOLATION_ENABLED attribute
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_set_mesh_ap_isolation(struct nlattr *attr,
- struct batadv_priv *bat_priv)
- {
- struct batadv_softif_vlan *vlan;
- vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
- if (!vlan)
- return -ENOENT;
- atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
- batadv_softif_vlan_put(vlan);
- return 0;
- }
- /**
- * batadv_netlink_mesh_fill() - Fill message with mesh attributes
- * @msg: Netlink message to dump into
- * @bat_priv: the bat priv with all the soft interface information
- * @cmd: type of message to generate
- * @portid: Port making netlink request
- * @seq: sequence number for message
- * @flags: Additional flags for message
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_mesh_fill(struct sk_buff *msg,
- struct batadv_priv *bat_priv,
- enum batadv_nl_commands cmd,
- u32 portid, u32 seq, int flags)
- {
- struct net_device *soft_iface = bat_priv->soft_iface;
- struct batadv_hard_iface *primary_if = NULL;
- struct net_device *hard_iface;
- void *hdr;
- hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
- if (!hdr)
- return -ENOBUFS;
- if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
- nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
- bat_priv->algo_ops->name) ||
- nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
- nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
- nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
- soft_iface->dev_addr) ||
- nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
- (u8)atomic_read(&bat_priv->tt.vn)))
- goto nla_put_failure;
- #ifdef CONFIG_BATMAN_ADV_BLA
- if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
- ntohs(bat_priv->bla.claim_dest.group)))
- goto nla_put_failure;
- #endif
- if (batadv_mcast_mesh_info_put(msg, bat_priv))
- goto nla_put_failure;
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
- hard_iface = primary_if->net_dev;
- if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
- hard_iface->ifindex) ||
- nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
- hard_iface->name) ||
- nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
- hard_iface->dev_addr))
- goto nla_put_failure;
- }
- if (nla_put_u8(msg, BATADV_ATTR_AGGREGATED_OGMS_ENABLED,
- !!atomic_read(&bat_priv->aggregated_ogms)))
- goto nla_put_failure;
- if (batadv_netlink_mesh_fill_ap_isolation(msg, bat_priv))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MARK,
- bat_priv->isolation_mark))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_ISOLATION_MASK,
- bat_priv->isolation_mark_mask))
- goto nla_put_failure;
- if (nla_put_u8(msg, BATADV_ATTR_BONDING_ENABLED,
- !!atomic_read(&bat_priv->bonding)))
- goto nla_put_failure;
- #ifdef CONFIG_BATMAN_ADV_BLA
- if (nla_put_u8(msg, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED,
- !!atomic_read(&bat_priv->bridge_loop_avoidance)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_BLA */
- #ifdef CONFIG_BATMAN_ADV_DAT
- if (nla_put_u8(msg, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED,
- !!atomic_read(&bat_priv->distributed_arp_table)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_DAT */
- if (nla_put_u8(msg, BATADV_ATTR_FRAGMENTATION_ENABLED,
- !!atomic_read(&bat_priv->fragmentation)))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_DOWN,
- atomic_read(&bat_priv->gw.bandwidth_down)))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_GW_BANDWIDTH_UP,
- atomic_read(&bat_priv->gw.bandwidth_up)))
- goto nla_put_failure;
- if (nla_put_u8(msg, BATADV_ATTR_GW_MODE,
- atomic_read(&bat_priv->gw.mode)))
- goto nla_put_failure;
- if (bat_priv->algo_ops->gw.get_best_gw_node &&
- bat_priv->algo_ops->gw.is_eligible) {
- /* GW selection class is not available if the routing algorithm
- * in use does not implement the GW API
- */
- if (nla_put_u32(msg, BATADV_ATTR_GW_SEL_CLASS,
- atomic_read(&bat_priv->gw.sel_class)))
- goto nla_put_failure;
- }
- if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
- atomic_read(&bat_priv->hop_penalty)))
- goto nla_put_failure;
- #ifdef CONFIG_BATMAN_ADV_DEBUG
- if (nla_put_u32(msg, BATADV_ATTR_LOG_LEVEL,
- atomic_read(&bat_priv->log_level)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_DEBUG */
- #ifdef CONFIG_BATMAN_ADV_MCAST
- if (nla_put_u8(msg, BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED,
- !atomic_read(&bat_priv->multicast_mode)))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_MULTICAST_FANOUT,
- atomic_read(&bat_priv->multicast_fanout)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_MCAST */
- #ifdef CONFIG_BATMAN_ADV_NC
- if (nla_put_u8(msg, BATADV_ATTR_NETWORK_CODING_ENABLED,
- !!atomic_read(&bat_priv->network_coding)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_NC */
- if (nla_put_u32(msg, BATADV_ATTR_ORIG_INTERVAL,
- atomic_read(&bat_priv->orig_interval)))
- goto nla_put_failure;
- if (primary_if)
- batadv_hardif_put(primary_if);
- genlmsg_end(msg, hdr);
- return 0;
- nla_put_failure:
- if (primary_if)
- batadv_hardif_put(primary_if);
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
- }
- /**
- * batadv_netlink_notify_mesh() - send softif attributes to listener
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: 0 on success, < 0 on error
- */
- int batadv_netlink_notify_mesh(struct batadv_priv *bat_priv)
- {
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_SET_MESH,
- 0, 0, 0);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- genlmsg_multicast_netns(&batadv_netlink_family,
- dev_net(bat_priv->soft_iface), msg, 0,
- BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
- return 0;
- }
- /**
- * batadv_netlink_get_mesh() - Get softif attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_get_mesh(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_mesh_fill(msg, bat_priv, BATADV_CMD_GET_MESH,
- info->snd_portid, info->snd_seq, 0);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- ret = genlmsg_reply(msg, info);
- return ret;
- }
- /**
- * batadv_netlink_set_mesh() - Set softif attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_set_mesh(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct nlattr *attr;
- if (info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_AGGREGATED_OGMS_ENABLED];
- atomic_set(&bat_priv->aggregated_ogms, !!nla_get_u8(attr));
- }
- if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
- batadv_netlink_set_mesh_ap_isolation(attr, bat_priv);
- }
- if (info->attrs[BATADV_ATTR_ISOLATION_MARK]) {
- attr = info->attrs[BATADV_ATTR_ISOLATION_MARK];
- bat_priv->isolation_mark = nla_get_u32(attr);
- }
- if (info->attrs[BATADV_ATTR_ISOLATION_MASK]) {
- attr = info->attrs[BATADV_ATTR_ISOLATION_MASK];
- bat_priv->isolation_mark_mask = nla_get_u32(attr);
- }
- if (info->attrs[BATADV_ATTR_BONDING_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_BONDING_ENABLED];
- atomic_set(&bat_priv->bonding, !!nla_get_u8(attr));
- }
- #ifdef CONFIG_BATMAN_ADV_BLA
- if (info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED];
- atomic_set(&bat_priv->bridge_loop_avoidance,
- !!nla_get_u8(attr));
- batadv_bla_status_update(bat_priv->soft_iface);
- }
- #endif /* CONFIG_BATMAN_ADV_BLA */
- #ifdef CONFIG_BATMAN_ADV_DAT
- if (info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED];
- atomic_set(&bat_priv->distributed_arp_table,
- !!nla_get_u8(attr));
- batadv_dat_status_update(bat_priv->soft_iface);
- }
- #endif /* CONFIG_BATMAN_ADV_DAT */
- if (info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_FRAGMENTATION_ENABLED];
- atomic_set(&bat_priv->fragmentation, !!nla_get_u8(attr));
- batadv_update_min_mtu(bat_priv->soft_iface);
- }
- if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN]) {
- attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_DOWN];
- atomic_set(&bat_priv->gw.bandwidth_down, nla_get_u32(attr));
- batadv_gw_tvlv_container_update(bat_priv);
- }
- if (info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP]) {
- attr = info->attrs[BATADV_ATTR_GW_BANDWIDTH_UP];
- atomic_set(&bat_priv->gw.bandwidth_up, nla_get_u32(attr));
- batadv_gw_tvlv_container_update(bat_priv);
- }
- if (info->attrs[BATADV_ATTR_GW_MODE]) {
- u8 gw_mode;
- attr = info->attrs[BATADV_ATTR_GW_MODE];
- gw_mode = nla_get_u8(attr);
- if (gw_mode <= BATADV_GW_MODE_SERVER) {
- /* Invoking batadv_gw_reselect() is not enough to really
- * de-select the current GW. It will only instruct the
- * gateway client code to perform a re-election the next
- * time that this is needed.
- *
- * When gw client mode is being switched off the current
- * GW must be de-selected explicitly otherwise no GW_ADD
- * uevent is thrown on client mode re-activation. This
- * is operation is performed in
- * batadv_gw_check_client_stop().
- */
- batadv_gw_reselect(bat_priv);
- /* always call batadv_gw_check_client_stop() before
- * changing the gateway state
- */
- batadv_gw_check_client_stop(bat_priv);
- atomic_set(&bat_priv->gw.mode, gw_mode);
- batadv_gw_tvlv_container_update(bat_priv);
- }
- }
- if (info->attrs[BATADV_ATTR_GW_SEL_CLASS] &&
- bat_priv->algo_ops->gw.get_best_gw_node &&
- bat_priv->algo_ops->gw.is_eligible) {
- /* setting the GW selection class is allowed only if the routing
- * algorithm in use implements the GW API
- */
- u32 sel_class_max = 0xffffffffu;
- u32 sel_class;
- attr = info->attrs[BATADV_ATTR_GW_SEL_CLASS];
- sel_class = nla_get_u32(attr);
- if (!bat_priv->algo_ops->gw.store_sel_class)
- sel_class_max = BATADV_TQ_MAX_VALUE;
- if (sel_class >= 1 && sel_class <= sel_class_max) {
- atomic_set(&bat_priv->gw.sel_class, sel_class);
- batadv_gw_reselect(bat_priv);
- }
- }
- if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
- attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
- atomic_set(&bat_priv->hop_penalty, nla_get_u8(attr));
- }
- #ifdef CONFIG_BATMAN_ADV_DEBUG
- if (info->attrs[BATADV_ATTR_LOG_LEVEL]) {
- attr = info->attrs[BATADV_ATTR_LOG_LEVEL];
- atomic_set(&bat_priv->log_level,
- nla_get_u32(attr) & BATADV_DBG_ALL);
- }
- #endif /* CONFIG_BATMAN_ADV_DEBUG */
- #ifdef CONFIG_BATMAN_ADV_MCAST
- if (info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED];
- atomic_set(&bat_priv->multicast_mode, !nla_get_u8(attr));
- }
- if (info->attrs[BATADV_ATTR_MULTICAST_FANOUT]) {
- attr = info->attrs[BATADV_ATTR_MULTICAST_FANOUT];
- atomic_set(&bat_priv->multicast_fanout, nla_get_u32(attr));
- }
- #endif /* CONFIG_BATMAN_ADV_MCAST */
- #ifdef CONFIG_BATMAN_ADV_NC
- if (info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_NETWORK_CODING_ENABLED];
- atomic_set(&bat_priv->network_coding, !!nla_get_u8(attr));
- batadv_nc_status_update(bat_priv->soft_iface);
- }
- #endif /* CONFIG_BATMAN_ADV_NC */
- if (info->attrs[BATADV_ATTR_ORIG_INTERVAL]) {
- u32 orig_interval;
- attr = info->attrs[BATADV_ATTR_ORIG_INTERVAL];
- orig_interval = nla_get_u32(attr);
- orig_interval = min_t(u32, orig_interval, INT_MAX);
- orig_interval = max_t(u32, orig_interval, 2 * BATADV_JITTER);
- atomic_set(&bat_priv->orig_interval, orig_interval);
- }
- batadv_netlink_notify_mesh(bat_priv);
- return 0;
- }
- /**
- * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
- * @msg: netlink message to be sent back
- * @cookie: tp meter session cookie
- *
- * Return: 0 on success, < 0 on error
- */
- static int
- batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
- {
- if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
- return -ENOBUFS;
- return 0;
- }
- /**
- * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
- * @bat_priv: the bat priv with all the soft interface information
- * @dst: destination of tp_meter session
- * @result: reason for tp meter session stop
- * @test_time: total time of the tp_meter session
- * @total_bytes: bytes acked to the receiver
- * @cookie: cookie of tp_meter session
- *
- * Return: 0 on success, < 0 on error
- */
- int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
- u8 result, u32 test_time, u64 total_bytes,
- u32 cookie)
- {
- struct sk_buff *msg;
- void *hdr;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
- BATADV_CMD_TP_METER);
- if (!hdr) {
- ret = -ENOBUFS;
- goto err_genlmsg;
- }
- if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
- goto nla_put_failure;
- if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
- BATADV_ATTR_PAD))
- goto nla_put_failure;
- if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
- goto nla_put_failure;
- if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
- goto nla_put_failure;
- genlmsg_end(msg, hdr);
- genlmsg_multicast_netns(&batadv_netlink_family,
- dev_net(bat_priv->soft_iface), msg, 0,
- BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
- return 0;
- nla_put_failure:
- genlmsg_cancel(msg, hdr);
- ret = -EMSGSIZE;
- err_genlmsg:
- nlmsg_free(msg);
- return ret;
- }
- /**
- * batadv_netlink_tp_meter_start() - Start a new tp_meter session
- * @skb: received netlink message
- * @info: receiver information
- *
- * Return: 0 on success, < 0 on error
- */
- static int
- batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct sk_buff *msg = NULL;
- u32 test_length;
- void *msg_head;
- u32 cookie;
- u8 *dst;
- int ret;
- if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
- return -EINVAL;
- if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
- return -EINVAL;
- dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
- test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg) {
- ret = -ENOMEM;
- goto out;
- }
- msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
- &batadv_netlink_family, 0,
- BATADV_CMD_TP_METER);
- if (!msg_head) {
- ret = -ENOBUFS;
- goto out;
- }
- batadv_tp_start(bat_priv, dst, test_length, &cookie);
- ret = batadv_netlink_tp_meter_put(msg, cookie);
- out:
- if (ret) {
- if (msg)
- nlmsg_free(msg);
- return ret;
- }
- genlmsg_end(msg, msg_head);
- return genlmsg_reply(msg, info);
- }
- /**
- * batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
- * @skb: received netlink message
- * @info: receiver information
- *
- * Return: 0 on success, < 0 on error
- */
- static int
- batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_priv *bat_priv = info->user_ptr[0];
- u8 *dst;
- int ret = 0;
- if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
- return -EINVAL;
- dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
- batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
- return ret;
- }
- /**
- * batadv_netlink_hardif_fill() - Fill message with hardif attributes
- * @msg: Netlink message to dump into
- * @bat_priv: the bat priv with all the soft interface information
- * @hard_iface: hard interface which was modified
- * @cmd: type of message to generate
- * @portid: Port making netlink request
- * @seq: sequence number for message
- * @flags: Additional flags for message
- * @cb: Control block containing additional options
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_hardif_fill(struct sk_buff *msg,
- struct batadv_priv *bat_priv,
- struct batadv_hard_iface *hard_iface,
- enum batadv_nl_commands cmd,
- u32 portid, u32 seq, int flags,
- struct netlink_callback *cb)
- {
- struct net_device *net_dev = hard_iface->net_dev;
- void *hdr;
- hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
- if (!hdr)
- return -ENOBUFS;
- if (cb)
- genl_dump_check_consistent(cb, hdr);
- if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
- bat_priv->soft_iface->ifindex))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
- net_dev->ifindex) ||
- nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
- net_dev->name) ||
- nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
- net_dev->dev_addr))
- goto nla_put_failure;
- if (hard_iface->if_status == BATADV_IF_ACTIVE) {
- if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
- goto nla_put_failure;
- }
- if (nla_put_u8(msg, BATADV_ATTR_HOP_PENALTY,
- atomic_read(&hard_iface->hop_penalty)))
- goto nla_put_failure;
- #ifdef CONFIG_BATMAN_ADV_BATMAN_V
- if (nla_put_u32(msg, BATADV_ATTR_ELP_INTERVAL,
- atomic_read(&hard_iface->bat_v.elp_interval)))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE,
- atomic_read(&hard_iface->bat_v.throughput_override)))
- goto nla_put_failure;
- #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
- genlmsg_end(msg, hdr);
- return 0;
- nla_put_failure:
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
- }
- /**
- * batadv_netlink_notify_hardif() - send hardif attributes to listener
- * @bat_priv: the bat priv with all the soft interface information
- * @hard_iface: hard interface which was modified
- *
- * Return: 0 on success, < 0 on error
- */
- int batadv_netlink_notify_hardif(struct batadv_priv *bat_priv,
- struct batadv_hard_iface *hard_iface)
- {
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
- BATADV_CMD_SET_HARDIF, 0, 0, 0, NULL);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- genlmsg_multicast_netns(&batadv_netlink_family,
- dev_net(bat_priv->soft_iface), msg, 0,
- BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
- return 0;
- }
- /**
- * batadv_netlink_get_hardif() - Get hardif attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_get_hardif(struct sk_buff *skb,
- struct genl_info *info)
- {
- struct batadv_hard_iface *hard_iface = info->user_ptr[1];
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
- BATADV_CMD_GET_HARDIF,
- info->snd_portid, info->snd_seq, 0,
- NULL);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- ret = genlmsg_reply(msg, info);
- return ret;
- }
- /**
- * batadv_netlink_set_hardif() - Set hardif attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_set_hardif(struct sk_buff *skb,
- struct genl_info *info)
- {
- struct batadv_hard_iface *hard_iface = info->user_ptr[1];
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct nlattr *attr;
- if (info->attrs[BATADV_ATTR_HOP_PENALTY]) {
- attr = info->attrs[BATADV_ATTR_HOP_PENALTY];
- atomic_set(&hard_iface->hop_penalty, nla_get_u8(attr));
- }
- #ifdef CONFIG_BATMAN_ADV_BATMAN_V
- if (info->attrs[BATADV_ATTR_ELP_INTERVAL]) {
- attr = info->attrs[BATADV_ATTR_ELP_INTERVAL];
- atomic_set(&hard_iface->bat_v.elp_interval, nla_get_u32(attr));
- }
- if (info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) {
- attr = info->attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE];
- atomic_set(&hard_iface->bat_v.throughput_override,
- nla_get_u32(attr));
- }
- #endif /* CONFIG_BATMAN_ADV_BATMAN_V */
- batadv_netlink_notify_hardif(bat_priv, hard_iface);
- return 0;
- }
- /**
- * batadv_netlink_dump_hardif() - Dump all hard interface into a messages
- * @msg: Netlink message to dump into
- * @cb: Parameters from query
- *
- * Return: error code, or length of reply message on success
- */
- static int
- batadv_netlink_dump_hardif(struct sk_buff *msg, struct netlink_callback *cb)
- {
- struct net *net = sock_net(cb->skb->sk);
- struct net_device *soft_iface;
- struct batadv_hard_iface *hard_iface;
- struct batadv_priv *bat_priv;
- int ifindex;
- int portid = NETLINK_CB(cb->skb).portid;
- int skip = cb->args[0];
- int i = 0;
- ifindex = batadv_netlink_get_ifindex(cb->nlh,
- BATADV_ATTR_MESH_IFINDEX);
- if (!ifindex)
- return -EINVAL;
- soft_iface = dev_get_by_index(net, ifindex);
- if (!soft_iface)
- return -ENODEV;
- if (!batadv_softif_is_valid(soft_iface)) {
- dev_put(soft_iface);
- return -ENODEV;
- }
- bat_priv = netdev_priv(soft_iface);
- rtnl_lock();
- cb->seq = batadv_hardif_generation << 1 | 1;
- list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
- if (hard_iface->soft_iface != soft_iface)
- continue;
- if (i++ < skip)
- continue;
- if (batadv_netlink_hardif_fill(msg, bat_priv, hard_iface,
- BATADV_CMD_GET_HARDIF,
- portid, cb->nlh->nlmsg_seq,
- NLM_F_MULTI, cb)) {
- i--;
- break;
- }
- }
- rtnl_unlock();
- dev_put(soft_iface);
- cb->args[0] = i;
- return msg->len;
- }
- /**
- * batadv_netlink_vlan_fill() - Fill message with vlan attributes
- * @msg: Netlink message to dump into
- * @bat_priv: the bat priv with all the soft interface information
- * @vlan: vlan which was modified
- * @cmd: type of message to generate
- * @portid: Port making netlink request
- * @seq: sequence number for message
- * @flags: Additional flags for message
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_vlan_fill(struct sk_buff *msg,
- struct batadv_priv *bat_priv,
- struct batadv_softif_vlan *vlan,
- enum batadv_nl_commands cmd,
- u32 portid, u32 seq, int flags)
- {
- void *hdr;
- hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, flags, cmd);
- if (!hdr)
- return -ENOBUFS;
- if (nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX,
- bat_priv->soft_iface->ifindex))
- goto nla_put_failure;
- if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
- goto nla_put_failure;
- if (nla_put_u8(msg, BATADV_ATTR_AP_ISOLATION_ENABLED,
- !!atomic_read(&vlan->ap_isolation)))
- goto nla_put_failure;
- genlmsg_end(msg, hdr);
- return 0;
- nla_put_failure:
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
- }
- /**
- * batadv_netlink_notify_vlan() - send vlan attributes to listener
- * @bat_priv: the bat priv with all the soft interface information
- * @vlan: vlan which was modified
- *
- * Return: 0 on success, < 0 on error
- */
- int batadv_netlink_notify_vlan(struct batadv_priv *bat_priv,
- struct batadv_softif_vlan *vlan)
- {
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan,
- BATADV_CMD_SET_VLAN, 0, 0, 0);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- genlmsg_multicast_netns(&batadv_netlink_family,
- dev_net(bat_priv->soft_iface), msg, 0,
- BATADV_NL_MCGRP_CONFIG, GFP_KERNEL);
- return 0;
- }
- /**
- * batadv_netlink_get_vlan() - Get vlan attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_get_vlan(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_softif_vlan *vlan = info->user_ptr[1];
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct sk_buff *msg;
- int ret;
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
- ret = batadv_netlink_vlan_fill(msg, bat_priv, vlan, BATADV_CMD_GET_VLAN,
- info->snd_portid, info->snd_seq, 0);
- if (ret < 0) {
- nlmsg_free(msg);
- return ret;
- }
- ret = genlmsg_reply(msg, info);
- return ret;
- }
- /**
- * batadv_netlink_set_vlan() - Get vlan attributes
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_netlink_set_vlan(struct sk_buff *skb, struct genl_info *info)
- {
- struct batadv_softif_vlan *vlan = info->user_ptr[1];
- struct batadv_priv *bat_priv = info->user_ptr[0];
- struct nlattr *attr;
- if (info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED]) {
- attr = info->attrs[BATADV_ATTR_AP_ISOLATION_ENABLED];
- atomic_set(&vlan->ap_isolation, !!nla_get_u8(attr));
- }
- batadv_netlink_notify_vlan(bat_priv, vlan);
- return 0;
- }
- /**
- * batadv_get_softif_from_info() - Retrieve soft interface from genl attributes
- * @net: the applicable net namespace
- * @info: receiver information
- *
- * Return: Pointer to soft interface (with increased refcnt) on success, error
- * pointer on error
- */
- static struct net_device *
- batadv_get_softif_from_info(struct net *net, struct genl_info *info)
- {
- struct net_device *soft_iface;
- int ifindex;
- if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
- return ERR_PTR(-EINVAL);
- ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
- soft_iface = dev_get_by_index(net, ifindex);
- if (!soft_iface)
- return ERR_PTR(-ENODEV);
- if (!batadv_softif_is_valid(soft_iface))
- goto err_put_softif;
- return soft_iface;
- err_put_softif:
- dev_put(soft_iface);
- return ERR_PTR(-EINVAL);
- }
- /**
- * batadv_get_hardif_from_info() - Retrieve hardif from genl attributes
- * @bat_priv: the bat priv with all the soft interface information
- * @net: the applicable net namespace
- * @info: receiver information
- *
- * Return: Pointer to hard interface (with increased refcnt) on success, error
- * pointer on error
- */
- static struct batadv_hard_iface *
- batadv_get_hardif_from_info(struct batadv_priv *bat_priv, struct net *net,
- struct genl_info *info)
- {
- struct batadv_hard_iface *hard_iface;
- struct net_device *hard_dev;
- unsigned int hardif_index;
- if (!info->attrs[BATADV_ATTR_HARD_IFINDEX])
- return ERR_PTR(-EINVAL);
- hardif_index = nla_get_u32(info->attrs[BATADV_ATTR_HARD_IFINDEX]);
- hard_dev = dev_get_by_index(net, hardif_index);
- if (!hard_dev)
- return ERR_PTR(-ENODEV);
- hard_iface = batadv_hardif_get_by_netdev(hard_dev);
- if (!hard_iface)
- goto err_put_harddev;
- if (hard_iface->soft_iface != bat_priv->soft_iface)
- goto err_put_hardif;
- /* hard_dev is referenced by hard_iface and not needed here */
- dev_put(hard_dev);
- return hard_iface;
- err_put_hardif:
- batadv_hardif_put(hard_iface);
- err_put_harddev:
- dev_put(hard_dev);
- return ERR_PTR(-EINVAL);
- }
- /**
- * batadv_get_vlan_from_info() - Retrieve vlan from genl attributes
- * @bat_priv: the bat priv with all the soft interface information
- * @net: the applicable net namespace
- * @info: receiver information
- *
- * Return: Pointer to vlan on success (with increased refcnt), error pointer
- * on error
- */
- static struct batadv_softif_vlan *
- batadv_get_vlan_from_info(struct batadv_priv *bat_priv, struct net *net,
- struct genl_info *info)
- {
- struct batadv_softif_vlan *vlan;
- u16 vid;
- if (!info->attrs[BATADV_ATTR_VLANID])
- return ERR_PTR(-EINVAL);
- vid = nla_get_u16(info->attrs[BATADV_ATTR_VLANID]);
- vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
- if (!vlan)
- return ERR_PTR(-ENOENT);
- return vlan;
- }
- /**
- * batadv_pre_doit() - Prepare batman-adv genl doit request
- * @ops: requested netlink operation
- * @skb: Netlink message with request data
- * @info: receiver information
- *
- * Return: 0 on success or negative error number in case of failure
- */
- static int batadv_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info)
- {
- struct net *net = genl_info_net(info);
- struct batadv_hard_iface *hard_iface;
- struct batadv_priv *bat_priv = NULL;
- struct batadv_softif_vlan *vlan;
- struct net_device *soft_iface;
- u8 user_ptr1_flags;
- u8 mesh_dep_flags;
- int ret;
- user_ptr1_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
- if (WARN_ON(hweight8(ops->internal_flags & user_ptr1_flags) > 1))
- return -EINVAL;
- mesh_dep_flags = BATADV_FLAG_NEED_HARDIF | BATADV_FLAG_NEED_VLAN;
- if (WARN_ON((ops->internal_flags & mesh_dep_flags) &&
- (~ops->internal_flags & BATADV_FLAG_NEED_MESH)))
- return -EINVAL;
- if (ops->internal_flags & BATADV_FLAG_NEED_MESH) {
- soft_iface = batadv_get_softif_from_info(net, info);
- if (IS_ERR(soft_iface))
- return PTR_ERR(soft_iface);
- bat_priv = netdev_priv(soft_iface);
- info->user_ptr[0] = bat_priv;
- }
- if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF) {
- hard_iface = batadv_get_hardif_from_info(bat_priv, net, info);
- if (IS_ERR(hard_iface)) {
- ret = PTR_ERR(hard_iface);
- goto err_put_softif;
- }
- info->user_ptr[1] = hard_iface;
- }
- if (ops->internal_flags & BATADV_FLAG_NEED_VLAN) {
- vlan = batadv_get_vlan_from_info(bat_priv, net, info);
- if (IS_ERR(vlan)) {
- ret = PTR_ERR(vlan);
- goto err_put_softif;
- }
- info->user_ptr[1] = vlan;
- }
- return 0;
- err_put_softif:
- if (bat_priv)
- dev_put(bat_priv->soft_iface);
- return ret;
- }
- /**
- * batadv_post_doit() - End batman-adv genl doit request
- * @ops: requested netlink operation
- * @skb: Netlink message with request data
- * @info: receiver information
- */
- static void batadv_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
- struct genl_info *info)
- {
- struct batadv_hard_iface *hard_iface;
- struct batadv_softif_vlan *vlan;
- struct batadv_priv *bat_priv;
- if (ops->internal_flags & BATADV_FLAG_NEED_HARDIF &&
- info->user_ptr[1]) {
- hard_iface = info->user_ptr[1];
- batadv_hardif_put(hard_iface);
- }
- if (ops->internal_flags & BATADV_FLAG_NEED_VLAN && info->user_ptr[1]) {
- vlan = info->user_ptr[1];
- batadv_softif_vlan_put(vlan);
- }
- if (ops->internal_flags & BATADV_FLAG_NEED_MESH && info->user_ptr[0]) {
- bat_priv = info->user_ptr[0];
- dev_put(bat_priv->soft_iface);
- }
- }
- static const struct genl_small_ops batadv_netlink_ops[] = {
- {
- .cmd = BATADV_CMD_GET_MESH,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- /* can be retrieved by unprivileged users */
- .doit = batadv_netlink_get_mesh,
- .internal_flags = BATADV_FLAG_NEED_MESH,
- },
- {
- .cmd = BATADV_CMD_TP_METER,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .doit = batadv_netlink_tp_meter_start,
- .internal_flags = BATADV_FLAG_NEED_MESH,
- },
- {
- .cmd = BATADV_CMD_TP_METER_CANCEL,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .doit = batadv_netlink_tp_meter_cancel,
- .internal_flags = BATADV_FLAG_NEED_MESH,
- },
- {
- .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_algo_dump,
- },
- {
- .cmd = BATADV_CMD_GET_HARDIF,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- /* can be retrieved by unprivileged users */
- .dumpit = batadv_netlink_dump_hardif,
- .doit = batadv_netlink_get_hardif,
- .internal_flags = BATADV_FLAG_NEED_MESH |
- BATADV_FLAG_NEED_HARDIF,
- },
- {
- .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_tt_local_dump,
- },
- {
- .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_tt_global_dump,
- },
- {
- .cmd = BATADV_CMD_GET_ORIGINATORS,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_orig_dump,
- },
- {
- .cmd = BATADV_CMD_GET_NEIGHBORS,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_hardif_neigh_dump,
- },
- {
- .cmd = BATADV_CMD_GET_GATEWAYS,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_gw_dump,
- },
- {
- .cmd = BATADV_CMD_GET_BLA_CLAIM,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_bla_claim_dump,
- },
- {
- .cmd = BATADV_CMD_GET_BLA_BACKBONE,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_bla_backbone_dump,
- },
- {
- .cmd = BATADV_CMD_GET_DAT_CACHE,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_dat_cache_dump,
- },
- {
- .cmd = BATADV_CMD_GET_MCAST_FLAGS,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .dumpit = batadv_mcast_flags_dump,
- },
- {
- .cmd = BATADV_CMD_SET_MESH,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .doit = batadv_netlink_set_mesh,
- .internal_flags = BATADV_FLAG_NEED_MESH,
- },
- {
- .cmd = BATADV_CMD_SET_HARDIF,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .doit = batadv_netlink_set_hardif,
- .internal_flags = BATADV_FLAG_NEED_MESH |
- BATADV_FLAG_NEED_HARDIF,
- },
- {
- .cmd = BATADV_CMD_GET_VLAN,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- /* can be retrieved by unprivileged users */
- .doit = batadv_netlink_get_vlan,
- .internal_flags = BATADV_FLAG_NEED_MESH |
- BATADV_FLAG_NEED_VLAN,
- },
- {
- .cmd = BATADV_CMD_SET_VLAN,
- .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
- .flags = GENL_UNS_ADMIN_PERM,
- .doit = batadv_netlink_set_vlan,
- .internal_flags = BATADV_FLAG_NEED_MESH |
- BATADV_FLAG_NEED_VLAN,
- },
- };
- struct genl_family batadv_netlink_family __ro_after_init = {
- .hdrsize = 0,
- .name = BATADV_NL_NAME,
- .version = 1,
- .maxattr = BATADV_ATTR_MAX,
- .policy = batadv_netlink_policy,
- .netnsok = true,
- .pre_doit = batadv_pre_doit,
- .post_doit = batadv_post_doit,
- .module = THIS_MODULE,
- .small_ops = batadv_netlink_ops,
- .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
- .mcgrps = batadv_netlink_mcgrps,
- .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
- };
- /**
- * batadv_netlink_register() - register batadv genl netlink family
- */
- void __init batadv_netlink_register(void)
- {
- int ret;
- ret = genl_register_family(&batadv_netlink_family);
- if (ret)
- pr_warn("unable to register netlink family");
- }
- /**
- * batadv_netlink_unregister() - unregister batadv genl netlink family
- */
- void batadv_netlink_unregister(void)
- {
- genl_unregister_family(&batadv_netlink_family);
- }
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