Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Andrew Lunn andrew@lunn.ch --- v2: Fix accidental newline deletion --- compat.h | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/compat.h b/compat.h index 5a5f478..813e637 100644 --- a/compat.h +++ b/compat.h @@ -140,6 +140,13 @@ static int __batadv_interface_kill_vid(struct net_device *dev, __be16 proto,\

#endif /* < KERNEL_VERSION(3, 15, 0) */

+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0) + +/* WARNING for batadv_getlink_net */ +#define get_link_net get_xstats_size || 0 || netdev->rtnl_link_ops->get_xstats_size + +#endif /* < KERNEL_VERSION(4, 0, 0) */ + #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)

#define IFF_NO_QUEUE 0; dev->tx_queue_len = 0

From: Matthias Schiffer mschiffer@universe-factory.net

debugfs is currently severely broken virtually everywhere in the kernel where files are dynamically added and removed (see http://lkml.iu.edu/hypermail/linux/kernel/1506.1/02196.html for some details). In addition to that, debugfs is not namespace-aware.

Also, the debugfs interface will try to fix the whole list of originators/ TT entries into a single buffer. The situation has improved in recent kernels,as the seq_file infrastructure will fall back to vmalloc now when kmalloc fails. Still, converting all information to text and potentially retrying multiple times until the buffer is big enough is very inefficient.

This commit adds generic infrastructur for the netlink interface to batman-adv and implements the following command:

* BATADV_CMD_GET_ROUTING_ALGOS: will return the list of supported routing algorithms * BATADV_CMD_GET_MESH_INFO: will return basic information about a batman-adv softif (name, index and MAC address for both the softif and the primary hardif; routing algorithm; batman-adv version) * BATADV_CMD_GET_HARDIFS: will return the list of hardifs (including index, name and MAC address) of all hardifs for a given softif

Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch --- v2: Added missing includes and forward declarations of structures. --- Makefile | 1 + include/uapi/linux/batman_adv.h | 49 ++++++++ net/batman-adv/Makefile | 1 + net/batman-adv/main.c | 51 ++++++++ net/batman-adv/main.h | 2 + net/batman-adv/netlink.c | 260 ++++++++++++++++++++++++++++++++++++++++ net/batman-adv/netlink.h | 41 +++++++ 7 files changed, 405 insertions(+) create mode 100644 include/uapi/linux/batman_adv.h create mode 100644 net/batman-adv/netlink.c create mode 100644 net/batman-adv/netlink.h

diff --git a/Makefile b/Makefile index 5d2c058..f17bde5 100644 --- a/Makefile +++ b/Makefile @@ -45,6 +45,7 @@ REVISION= $(shell if [ -d "$(PWD)/.git" ]; then \ fi) export NOSTDINC_FLAGS := \ -I$(PWD)/compat-include/ \ + -I$(PWD)/include/ \ -include $(PWD)/compat.h \ $(CFLAGS)

diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h new file mode 100644 index 0000000..b9b7dfd --- /dev/null +++ b/include/uapi/linux/batman_adv.h @@ -0,0 +1,49 @@ +/* Copyright (C) 2016 B.A.T.M.A.N. contributors: + * + * Matthias Schiffer + * + * 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/. + */ + +#ifndef _UAPI_LINUX_BATMAN_ADV_H_ +#define _UAPI_LINUX_BATMAN_ADV_H_ + +#define BATADV_NL_NAME "batadv" + +enum { + BATADV_ATTR_UNSPEC, + BATADV_ATTR_VERSION, + BATADV_ATTR_ALGO_NAME, + BATADV_ATTR_MESH_IFINDEX, + BATADV_ATTR_MESH_IFNAME, + BATADV_ATTR_MESH_ADDRESS, + BATADV_ATTR_HARD_IFINDEX, + BATADV_ATTR_HARD_IFNAME, + BATADV_ATTR_HARD_ADDRESS, + BATADV_ATTR_ACTIVE, + __BATADV_ATTR_MAX, +}; + +#define BATADV_ATTR_MAX (__BATADV_ATTR_MAX - 1) + +enum { + BATADV_CMD_UNSPEC, + BATADV_CMD_GET_ROUTING_ALGOS, + BATADV_CMD_GET_MESH_INFO, + BATADV_CMD_GET_HARDIFS, + __BATADV_CMD_MAX, +}; + +#define BATADV_CMD_MAX (__BATADV_CMD_MAX - 1) + +#endif /* _UAPI_LINUX_BATMAN_ADV_H_ */ diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile index 797cf2f..4e5adba 100644 --- a/net/batman-adv/Makefile +++ b/net/batman-adv/Makefile @@ -33,6 +33,7 @@ batman-adv-y += hash.o batman-adv-y += icmp_socket.o batman-adv-y += main.o batman-adv-$(CONFIG_BATMAN_ADV_MCAST) += multicast.o +batman-adv-y += netlink.o batman-adv-$(CONFIG_BATMAN_ADV_NC) += network-coding.o batman-adv-y += originator.o batman-adv-y += routing.o diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 5f2974b..7b5f585 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -35,6 +35,7 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/pkt_sched.h> #include <linux/rculist.h> #include <linux/rcupdate.h> @@ -46,7 +47,10 @@ #include <linux/string.h> #include <linux/workqueue.h> #include <net/dsfield.h> +#include <net/genetlink.h> +#include <net/netlink.h> #include <net/rtnetlink.h> +#include <uapi/linux/batman_adv.h>

#include "bat_algo.h" #include "bridge_loop_avoidance.h" @@ -57,6 +61,7 @@ #include "hard-interface.h" #include "icmp_socket.h" #include "multicast.h" +#include "netlink.h" #include "network-coding.h" #include "originator.h" #include "packet.h" @@ -101,6 +106,7 @@ static int __init batadv_init(void)

register_netdevice_notifier(&batadv_hard_if_notifier); rtnl_link_register(&batadv_link_ops); + batadv_netlink_register();

pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); @@ -111,6 +117,7 @@ static int __init batadv_init(void) static void __exit batadv_exit(void) { batadv_debugfs_destroy(); + batadv_netlink_unregister(); rtnl_link_unregister(&batadv_link_ops); unregister_netdevice_notifier(&batadv_hard_if_notifier); batadv_hardif_remove_interfaces(); @@ -610,6 +617,50 @@ int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) return 0; }

+static int batadv_algo_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_algo_ops *bat_algo_ops) +{ + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_ROUTING_ALGOS); + if (!hdr) + return -EMSGSIZE; + + if (nla_put_string(msg, BATADV_ATTR_ALGO_NAME, bat_algo_ops->name)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +int batadv_algo_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + int portid = NETLINK_CB(cb->skb).portid; + struct batadv_algo_ops *bat_algo_ops; + int skip = cb->args[0]; + int i = 0; + + hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { + if (i++ < skip) + continue; + + if (batadv_algo_dump_entry(msg, portid, cb->nlh->nlmsg_seq, + bat_algo_ops)) { + i--; + break; + } + } + + cb->args[0] = i; + + return msg->len; +} + /** * batadv_skb_crc32 - calculate CRC32 of the whole packet and skip bytes in * the header diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 7692526..3b770df 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -191,6 +191,7 @@ enum batadv_uev_type { #include "types.h"

struct batadv_ogm_packet; +struct netlink_callback; struct seq_file; struct sk_buff;

@@ -221,6 +222,7 @@ void batadv_recv_handler_unregister(u8 packet_type); int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops); int batadv_algo_select(struct batadv_priv *bat_priv, char *name); int batadv_algo_seq_print_text(struct seq_file *seq, void *offset); +int batadv_algo_dump(struct sk_buff *msg, struct netlink_callback *cb); __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr);

/** diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c new file mode 100644 index 0000000..e302de3 --- /dev/null +++ b/net/batman-adv/netlink.c @@ -0,0 +1,260 @@ +/* Copyright (C) 2016 B.A.T.M.A.N. contributors: + * + * Matthias Schiffer + * + * 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 "main.h" +#include "netlink.h" + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/if_ether.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/netlink.h> +#include <linux/printk.h> +#include <linux/rculist.h> +#include <linux/rcupdate.h> +#include <linux/skbuff.h> +#include <linux/stddef.h> +#include <linux/types.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h> + +#include "hard-interface.h" +#include "soft-interface.h" + +struct genl_family batadv_netlink_family = { + .id = GENL_ID_GENERATE, + .hdrsize = 0, + .name = BATADV_NL_NAME, + .version = 1, + .maxattr = BATADV_ATTR_MAX, +}; + +static int +batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface) +{ + int ret = -ENOBUFS; + struct batadv_priv *bat_priv = netdev_priv(soft_iface); + struct batadv_hard_iface *primary_if = NULL; + struct net_device *hard_iface; + + if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) || + nla_put_string(msg, BATADV_ATTR_ALGO_NAME, + bat_priv->bat_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)) + goto out; + + 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 out; + } + + ret = 0; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + + return ret; +} + +static int +batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info) +{ + struct net *net = genl_info_net(info); + int ret; + struct sk_buff *msg = NULL; + void *msg_head; + int ifindex; + struct net_device *soft_iface; + + if (!info->attrs[BATADV_ATTR_MESH_IFINDEX]) + return -EINVAL; + + ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + 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_GET_MESH_INFO); + if (!msg_head) { + ret = -ENOBUFS; + goto out; + } + + ret = batadv_netlink_mesh_info_put(msg, soft_iface); + + out: + if (soft_iface) + dev_put(soft_iface); + + if (ret) { + if (msg) + nlmsg_free(msg); + return ret; + } + + genlmsg_end(msg, msg_head); + return genlmsg_reply(msg, info); +} + +static int +batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *hard_iface) +{ + struct net_device *net_dev = hard_iface->net_dev; + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_HARDIFS); + if (!hdr) + return -EMSGSIZE; + + 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; + } + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int +batadv_netlink_dump_hardifs(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; + int ifindex; + int portid = NETLINK_CB(cb->skb).portid; + int seq = cb->nlh->nlmsg_seq; + 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; + } + + rcu_read_lock(); + + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->soft_iface != soft_iface) + continue; + + if (i++ < skip) + continue; + + if (batadv_netlink_dump_hardif_entry(msg, portid, seq, + hard_iface)) { + i--; + break; + } + } + + rcu_read_unlock(); + + dev_put(soft_iface); + + cb->args[0] = i; + + return msg->len; +} + +static struct nla_policy batadv_netlink_policy[BATADV_ATTR_MAX + 1] = { + [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 }, +}; + +static struct genl_ops batadv_netlink_ops[] = { + { + .cmd = BATADV_CMD_GET_ROUTING_ALGOS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_algo_dump, + }, + { + .cmd = BATADV_CMD_GET_MESH_INFO, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .doit = batadv_netlink_get_mesh_info, + }, + { + .cmd = BATADV_CMD_GET_HARDIFS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_netlink_dump_hardifs, + }, +}; + +void __init batadv_netlink_register(void) +{ + int ret; + + ret = genl_register_family_with_ops(&batadv_netlink_family, + batadv_netlink_ops); + if (ret) + pr_warn("unable to register netlink family"); +} + +void batadv_netlink_unregister(void) +{ + genl_unregister_family(&batadv_netlink_family); +} diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h new file mode 100644 index 0000000..ae0eeb9 --- /dev/null +++ b/net/batman-adv/netlink.h @@ -0,0 +1,41 @@ +/* Copyright (C) 2016 B.A.T.M.A.N. contributors: + * + * Matthias Schiffer + * + * 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/. + */ + +#ifndef _NET_BATMAN_ADV_NETLINK_H_ +#define _NET_BATMAN_ADV_NETLINK_H_ + +#include <linux/compiler.h> +#include <linux/genetlink.h> +#include <net/genetlink.h> +#include <net/netlink.h> + +struct nlmsghdr; + +void batadv_netlink_register(void); +void batadv_netlink_unregister(void); + +static inline int +batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) +{ + struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); + + return attr ? nla_get_u32(attr) : 0; +} + +extern struct genl_family batadv_netlink_family; + +#endif /* _NET_BATMAN_ADV_NETLINK_H_ */

From: Matthias Schiffer mschiffer@universe-factory.net

This adds the commands BATADV_CMD_GET_TRANSTABLE_LOCAL and BATADV_CMD_GET_TRANSTABLE_GLOBAL, which correspond to the transtable_local and transtable_global debugfs files.

The batadv_tt_client_flags enum is moved to the UAPI to expose it as part of the netlink API.

Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch --- v2: Add missing header files. --- include/uapi/linux/batman_adv.h | 47 ++++++ net/batman-adv/netlink.c | 13 ++ net/batman-adv/packet.h | 36 ----- net/batman-adv/translation-table.c | 308 +++++++++++++++++++++++++++++++++++++ net/batman-adv/translation-table.h | 4 + 5 files changed, 372 insertions(+), 36 deletions(-)

diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index b9b7dfd..25dee3c 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -20,6 +20,42 @@

#define BATADV_NL_NAME "batadv"

+/** + * enum batadv_tt_client_flags - TT client specific flags + * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table + * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new + * update telling its new real location has not been received/sent yet + * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. + * This information is used by the "AP Isolation" feature + * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This + * information is used by the Extended Isolation feature + * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table + * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has + * not been announced yet + * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept + * in the table for one more originator interval for consistency purposes + * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of + * the network but no nnode has already announced it + * + * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. + * Bits from 8 to 15 are called _local flags_ because they are used for local + * computations only. + * + * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with + * the other nodes in the network. To achieve this goal these flags are included + * in the TT CRC computation. + */ +enum batadv_tt_client_flags { + BATADV_TT_CLIENT_DEL = (1 << 0), + BATADV_TT_CLIENT_ROAM = (1 << 1), + BATADV_TT_CLIENT_WIFI = (1 << 4), + BATADV_TT_CLIENT_ISOLA = (1 << 5), + BATADV_TT_CLIENT_NOPURGE = (1 << 8), + BATADV_TT_CLIENT_NEW = (1 << 9), + BATADV_TT_CLIENT_PENDING = (1 << 10), + BATADV_TT_CLIENT_TEMP = (1 << 11), +}; + enum { BATADV_ATTR_UNSPEC, BATADV_ATTR_VERSION, @@ -31,6 +67,15 @@ enum { BATADV_ATTR_HARD_IFNAME, BATADV_ATTR_HARD_ADDRESS, BATADV_ATTR_ACTIVE, + BATADV_ATTR_ORIG_ADDRESS, + BATADV_ATTR_TT_ADDRESS, + BATADV_ATTR_TT_TTVN, + BATADV_ATTR_TT_LAST_TTVN, + BATADV_ATTR_TT_CRC32, + BATADV_ATTR_TT_VID, + BATADV_ATTR_TT_FLAGS, + BATADV_ATTR_FLAG_BEST, + BATADV_ATTR_LAST_SEEN_MSECS, __BATADV_ATTR_MAX, };

@@ -41,6 +86,8 @@ enum { BATADV_CMD_GET_ROUTING_ALGOS, BATADV_CMD_GET_MESH_INFO, BATADV_CMD_GET_HARDIFS, + BATADV_CMD_GET_TRANSTABLE_LOCAL, + BATADV_CMD_GET_TRANSTABLE_GLOBAL, __BATADV_CMD_MAX, };

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index e302de3..3fb1c1f 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -35,6 +35,7 @@

#include "hard-interface.h" #include "soft-interface.h" +#include "translation-table.h"

struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, @@ -242,6 +243,18 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_netlink_dump_hardifs, }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_local_dump, + }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_global_dump, + }, };

void __init batadv_netlink_register(void) diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 372128d..b45460d 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -126,42 +126,6 @@ enum batadv_tt_data_flags { };

/** - * enum batadv_tt_client_flags - TT client specific flags - * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table - * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new - * update telling its new real location has not been received/sent yet - * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. - * This information is used by the "AP Isolation" feature - * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This - * information is used by the Extended Isolation feature - * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table - * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has - * not been announced yet - * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept - * in the table for one more originator interval for consistency purposes - * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of - * the network but no nnode has already announced it - * - * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. - * Bits from 8 to 15 are called _local flags_ because they are used for local - * computations only. - * - * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with - * the other nodes in the network. To achieve this goal these flags are included - * in the TT CRC computation. - */ -enum batadv_tt_client_flags { - BATADV_TT_CLIENT_DEL = BIT(0), - BATADV_TT_CLIENT_ROAM = BIT(1), - BATADV_TT_CLIENT_WIFI = BIT(4), - BATADV_TT_CLIENT_ISOLA = BIT(5), - BATADV_TT_CLIENT_NOPURGE = BIT(8), - BATADV_TT_CLIENT_NEW = BIT(9), - BATADV_TT_CLIENT_PENDING = BIT(10), - BATADV_TT_CLIENT_TEMP = BIT(11), -}; - -/** * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not */ diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index feaf492..be42b12 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -35,19 +35,26 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.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/genetlink.h> +#include <net/netlink.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>

#include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "multicast.h" +#include "netlink.h" #include "originator.h" #include "packet.h" #include "soft-interface.h" @@ -1056,6 +1063,138 @@ out: return 0; }

+static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common) +{ + void *hdr; + struct batadv_softif_vlan *vlan; + struct batadv_tt_local_entry *local; + unsigned int last_seen_msecs; + u32 crc; + + local = container_of(common, struct batadv_tt_local_entry, common); + last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); + + vlan = batadv_softif_vlan_get(bat_priv, common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_softif_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_LOCAL); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, + BATADV_PRINT_VID(common->vid)) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (!(common->flags & BATADV_TT_CLIENT_NOPURGE)) { + if (nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + } + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int +batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, + common)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + return 0; +} + +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + 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 || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.local_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, + bat_priv, head, &idx)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + + return ret; +} + static void batadv_tt_local_set_pending(struct batadv_priv *bat_priv, struct batadv_tt_local_entry *tt_local_entry, @@ -1702,6 +1841,175 @@ out: return 0; }

+static int +batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_tt_common_entry *common, + struct batadv_tt_orig_list_entry *orig, + bool best) +{ + void *hdr; + struct batadv_orig_node_vlan *vlan; + u8 last_ttvn; + u32 crc; + + vlan = batadv_orig_node_vlan_get(orig->orig_node, + common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_orig_node_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_GLOBAL); + if (!hdr) + return -ENOBUFS; + + last_ttvn = atomic_read(&orig->orig_node->last_ttvn); + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, + orig->orig_node->orig) || + nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || + nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, + BATADV_PRINT_VID(common->vid)) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int +batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common, int *sub_s) +{ + struct batadv_tt_orig_list_entry *orig_entry, *best_entry; + struct batadv_tt_global_entry *global; + struct hlist_head *head; + int sub = 0; + bool best; + + global = container_of(common, struct batadv_tt_global_entry, common); + best_entry = batadv_transtable_best_orig(bat_priv, global); + head = &global->orig_list; + + hlist_for_each_entry_rcu(orig_entry, head, list) { + if (sub++ < *sub_s) + continue; + + best = (orig_entry == best_entry); + + if (batadv_tt_global_dump_subentry(msg, portid, seq, common, + orig_entry, best)) { + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + *sub_s = 0; + return 0; +} + +static int +batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, + common, sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + 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 || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.global_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_global_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, bat_priv, + head, &idx, &sub)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; + + return ret; +} + /** * _batadv_tt_global_del_orig_entry - remove and free an orig_entry * @tt_global_entry: the global entry to remove the orig_entry from diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index 7c7e2c0..4697af6 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -22,8 +22,10 @@

#include <linux/types.h>

+struct netlink_callback; struct net_device; struct seq_file; +struct sk_buff;

int batadv_tt_init(struct batadv_priv *bat_priv); bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, @@ -33,6 +35,8 @@ u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const char *message, bool roaming); int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset); int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset); +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb); +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb); void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, s32 match_vid, const char *message);

From: Matthias Schiffer mschiffer@universe-factory.net

Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net --- include/uapi/linux/batman_adv.h | 2 + net/batman-adv/bat_iv_ogm.c | 268 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 270 insertions(+)

diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 35d8e8c..baf4ac8 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -76,6 +76,8 @@ enum { BATADV_ATTR_TT_FLAGS, BATADV_ATTR_FLAG_BEST, BATADV_ATTR_LAST_SEEN_MSECS, + BATADV_ATTR_NEIGH_ADDRESS, + BATADV_ATTR_TQ, __BATADV_ATTR_MAX, };

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index ce2f203..e70560e 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -47,10 +47,12 @@ #include <linux/string.h> #include <linux/types.h> #include <linux/workqueue.h> +#include <uapi/linux/batman_adv.h>

#include "bitarray.h" #include "hard-interface.h" #include "hash.h" +#include "netlink.h" #include "network-coding.h" #include "originator.h" #include "packet.h" @@ -1918,6 +1920,171 @@ next: seq_puts(seq, "No batman nodes in range ...\n"); }

+static bool +batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node, + struct batadv_hard_iface *if_outgoing, + u8 *tq_avg) +{ + struct batadv_neigh_ifinfo *n_ifinfo; + + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + return false; + + *tq_avg = n_ifinfo->bat_iv.tq_avg; + batadv_neigh_ifinfo_put(n_ifinfo); + + return true; +} + +static int +batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, + struct batadv_neigh_node *neigh_node, + bool best) +{ + void *hdr; + u8 tq_avg; + unsigned int last_seen_msecs; + + last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); + + if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg)) + return 0; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_ORIGINATORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, orig_node->orig) || + nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + neigh_node->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + neigh_node->if_incoming->net_dev->ifindex) || + nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int +batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, int *sub_s) +{ + struct batadv_neigh_node *neigh_node_best; + struct batadv_neigh_node *neigh_node; + int sub = 0; + bool best; + u8 tq_avg_best; + + neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); + if (!neigh_node_best) + goto out; + + if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing, + &tq_avg_best)) + goto out; + + if (tq_avg_best == 0) + goto out; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + if (sub++ < *sub_s) + continue; + + best = (neigh_node == neigh_node_best); + + if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq, bat_priv, + if_outgoing, orig_node, + neigh_node, best)) { + batadv_neigh_node_put(neigh_node_best); + + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + out: + if (neigh_node_best) + batadv_neigh_node_put(neigh_node_best); + + *sub_s = 0; + return 0; +} + +static int +batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_orig_node *orig_node; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv, + if_outgoing, orig_node, + sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +static void +batadv_iv_ogm_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_iv_ogm_orig_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, if_outgoing, head, + &idx, &sub)) + break; + + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; +} + /** * batadv_iv_hardif_neigh_print - print a single hop neighbour node * @seq: neighbour table seq_file struct @@ -1969,6 +2136,105 @@ static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, seq_puts(seq, "No batman nodes in range ...\n"); }

+static int +batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hardif_neigh_node *hardif_neigh) +{ + void *hdr; + unsigned int last_seen_msecs; + + last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_NEIGHBORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + hardif_neigh->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + hardif_neigh->if_incoming->net_dev->ifindex) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int +batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *hard_iface, + int *idx_s) +{ + struct batadv_hardif_neigh_node *hardif_neigh; + int idx = 0; + + hlist_for_each_entry_rcu(hardif_neigh, + &hard_iface->neigh_list, list) { + if (idx++ < *idx_s) + continue; + + if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq, + hardif_neigh)) { + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + + *idx_s = 0; + return 0; +} + +static void +batadv_iv_ogm_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *single_hardif) +{ + struct batadv_hard_iface *hard_iface; + int i_hardif = 0; + int i_hardif_s = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + rcu_read_lock(); + if (single_hardif) { + if (i_hardif_s == 0) { + if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, + single_hardif, + &idx) == 0) + i_hardif++; + } + } else { + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + if (i_hardif++ < i_hardif_s) + continue; + + if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, + hard_iface, &idx)) { + i_hardif--; + break; + } + } + } + rcu_read_unlock(); + + cb->args[0] = i_hardif; + cb->args[1] = idx; +} + /** * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors * @neigh1: the first neighbor object of the comparison @@ -2063,7 +2329,9 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = { .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, .bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob, .bat_neigh_print = batadv_iv_neigh_print, + .bat_neigh_dump = batadv_iv_ogm_neigh_dump, .bat_orig_print = batadv_iv_ogm_orig_print, + .bat_orig_dump = batadv_iv_ogm_orig_dump, .bat_orig_free = batadv_iv_ogm_orig_free, .bat_orig_add_if = batadv_iv_ogm_orig_add_if, .bat_orig_del_if = batadv_iv_ogm_orig_del_if,

Set the netnsof flag on the family structure, indicating it can be used with different network name spaces.

Signed-off-by: Andrew Lunn andrew@lunn.ch --- net/batman-adv/netlink.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index a01bdf5..e188c2b 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -44,6 +44,7 @@ struct genl_family batadv_netlink_family = { .name = BATADV_NL_NAME, .version = 1, .maxattr = BATADV_ATTR_MAX, + .netnsok = true, };

static int

Dump the list of bridge loop avoidance claims via the netlink socket.

Signed-off-by: Andrew Lunn andrew@lunn.ch --- v2: Missing includes and forward declarations Fix exit on error when dumping. --- include/uapi/linux/batman_adv.h | 6 ++ net/batman-adv/bridge_loop_avoidance.c | 166 +++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 10 +- net/batman-adv/netlink.c | 7 ++ 4 files changed, 188 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index cce4955..6a97a2c 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -82,6 +82,11 @@ enum { BATADV_ATTR_BANDWIDTH_UP, BATADV_ATTR_BANDWIDTH_DOWN, BATADV_ATTR_ROUTER, + BATADV_ATTR_BLA_OWN, + BATADV_ATTR_BLA_ADDRESS, + BATADV_ATTR_BLA_VID, + BATADV_ATTR_BLA_BACKBONE, + BATADV_ATTR_BLA_CRC, __BATADV_ATTR_MAX, };

@@ -97,6 +102,7 @@ enum { BATADV_CMD_GET_ORIGINATORS, BATADV_CMD_GET_NEIGHBORS, BATADV_CMD_GET_GATEWAYS, + BATADV_CMD_GET_BLA_CLAIM, __BATADV_CMD_MAX, };

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 748a9ea..99458f3 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -35,6 +35,7 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> @@ -45,11 +46,17 @@ #include <linux/string.h> #include <linux/workqueue.h> #include <net/arp.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>

#include "hard-interface.h" #include "hash.h" +#include "netlink.h" #include "originator.h" #include "packet.h" +#include "soft-interface.h" #include "sysfs.h" #include "translation-table.h"

@@ -1983,6 +1990,165 @@ out: }

/** + * batadv_bla_claim_dump_entry - dump one entry of the backbone table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @claim: entry to dump + * + * Return: 0 or error code. + */ +static int +batadv_bla_claim_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct batadv_bla_claim *claim) +{ + u8 *primary_addr = primary_if->net_dev->dev_addr; + u16 backbone_crc; + bool is_own; + void *hdr; + int ret = -EINVAL; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_BLA_CLAIM); + if (!hdr) { + ret = -ENOBUFS; + goto out; + } + + is_own = batadv_compare_eth(claim->backbone_gw->orig, + primary_addr); + + spin_lock_bh(&claim->backbone_gw->crc_lock); + backbone_crc = claim->backbone_gw->crc; + spin_unlock_bh(&claim->backbone_gw->crc_lock); + + if (is_own) + if (nla_put_flag(msg, BATADV_ATTR_BLA_OWN)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + if (nla_put(msg, BATADV_ATTR_BLA_ADDRESS, ETH_ALEN, claim->addr) || + nla_put_u16(msg, BATADV_ATTR_BLA_VID, claim->vid) || + nla_put(msg, BATADV_ATTR_BLA_BACKBONE, ETH_ALEN, + claim->backbone_gw->orig) || + nla_put_u16(msg, BATADV_ATTR_BLA_CRC, + backbone_crc)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + genlmsg_end(msg, hdr); + ret = 0; + +out: + return ret; +} + +/** + * batadv_bla_claim_dump_bucket - dump one bucket of the backbone table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @head: bucket to dump + * @idx_skip: How many entries to skip + * + * Return: always 0. + */ +static int +batadv_bla_claim_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct hlist_head *head, int *idx_skip) +{ + struct batadv_bla_claim *claim; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(claim, head, hash_entry) { + if (idx++ < *idx_skip) + continue; + if (batadv_bla_claim_dump_entry(msg, portid, seq, + primary_if, claim)) { + *idx_skip = idx - 1; + goto unlock; + } + } + + *idx_skip = idx; +unlock: + rcu_read_unlock(); + return 0; +} + +/** + * batadv_bla_claim_dump - dump backbone table to a netlink socket + * @msg: buffer for the message + * @cb: callback structure containing arguments + * + * Return: message length. + */ +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct batadv_hard_iface *primary_if = NULL; + int portid = NETLINK_CB(cb->skb).portid; + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_hashtable *hash; + struct batadv_priv *bat_priv; + int bucket = cb->args[0]; + struct hlist_head *head; + int idx = cb->args[1]; + int ifindex; + int ret; + + 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 || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + hash = bat_priv->bla.claim_hash; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_bla_claim_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + primary_if, head, &idx)) + break; + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + + ret = msg->len; + +out: + if (primary_if) + batadv_hardif_put(primary_if); + + return 0; +} + +/** * batadv_bla_backbone_table_seq_print_text - print the backbone table in a seq * file * @seq: seq file to print on diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 0f01dae..a80b9e9 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -23,6 +23,7 @@ #include <linux/types.h>

struct net_device; +struct netlink_callback; struct seq_file; struct sk_buff;

@@ -35,6 +36,7 @@ bool batadv_bla_is_backbone_gw(struct sk_buff *skb, struct batadv_orig_node *orig_node, int hdr_size); int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset); +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset); bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, @@ -47,7 +49,7 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, void batadv_bla_status_update(struct net_device *net_dev); int batadv_bla_init(struct batadv_priv *bat_priv); void batadv_bla_free(struct batadv_priv *bat_priv); - +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); #define BATADV_BLA_CRC_INIT 0 #else /* ifdef CONFIG_BATMAN_ADV_BLA */

@@ -112,6 +114,12 @@ static inline void batadv_bla_free(struct batadv_priv *bat_priv) { }

+static inline int batadv_bla_claim_dump(struct sk_buff *msg, + struct netlink_callback *cb) +{ + return -EOPNOTSUPP; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */

#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 8fe7df5..671d5b6 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -33,6 +33,7 @@ #include <net/sock.h> #include <uapi/linux/batman_adv.h>

+#include "bridge_loop_avoidance.h" #include "gateway_client.h" #include "hard-interface.h" #include "originator.h" @@ -277,6 +278,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_gw_dump, }, + { + .cmd = BATADV_CMD_GET_BLA_CLAIM, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_bla_claim_dump, + }, };

void __init batadv_netlink_register(void)