Repository : ssh://git@open-mesh.org/batman-adv
On branch : master
commit d63265313b2401bae227a743e231e74686d67e6e Author: Matthias Schiffer mschiffer@universe-factory.net Date: Sun Jul 3 13:31:35 2016 +0200
batman-adv: netlink: add routing_algo query
BATADV_CMD_GET_ROUTING_ALGOS is used to get the list of supported routing algorithms.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: Reduce the number of changes to BATADV_CMD_GET_ROUTING_ALGOS, fix includes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com Signed-off-by: Simon Wunderlich sw@simonwunderlich.de Signed-off-by: Marek Lindner mareklindner@neomailbox.ch
d63265313b2401bae227a743e231e74686d67e6e compat-include/linux/netlink.h | 18 +++++++++++ include/uapi/linux/batman_adv.h | 2 ++ net/batman-adv/bat_algo.c | 68 +++++++++++++++++++++++++++++++++++++++++ net/batman-adv/bat_algo.h | 3 ++ net/batman-adv/netlink.c | 9 +++++- net/batman-adv/netlink.h | 3 ++ 6 files changed, 102 insertions(+), 1 deletion(-)
diff --git a/compat-include/linux/netlink.h b/compat-include/linux/netlink.h index eb5b7f4..4f2185d 100644 --- a/compat-include/linux/netlink.h +++ b/compat-include/linux/netlink.h @@ -24,6 +24,24 @@ #include <linux/version.h> #include_next <linux/netlink.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 0) + +#include <net/scm.h> + +struct batadv_netlink_skb_parms { + struct ucred creds; /* Skb credentials */ + union { + __u32 portid; + __u32 pid; + }; + __u32 dst_group; +}; + +#undef NETLINK_CB +#define NETLINK_CB(skb) (*(struct batadv_netlink_skb_parms *)&((skb)->cb)) + +#endif /* < KERNEL_VERSION(3, 7, 0) */ + #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
#include_next <net/netlink.h> diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 0fbf6fd..7afce44 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -73,6 +73,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_MESH_INFO: Query basic information about batman-adv device * @BATADV_CMD_TP_METER: Start a tp meter session * @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session + * @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms. * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -81,6 +82,7 @@ enum batadv_nl_commands { BATADV_CMD_GET_MESH_INFO, BATADV_CMD_TP_METER, BATADV_CMD_TP_METER_CANCEL, + BATADV_CMD_GET_ROUTING_ALGOS, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/bat_algo.c b/net/batman-adv/bat_algo.c index 81dbbf5..f2cc50d 100644 --- a/net/batman-adv/bat_algo.c +++ b/net/batman-adv/bat_algo.c @@ -20,12 +20,18 @@ #include <linux/errno.h> #include <linux/list.h> #include <linux/moduleparam.h> +#include <linux/netlink.h> #include <linux/printk.h> #include <linux/seq_file.h> +#include <linux/skbuff.h> #include <linux/stddef.h> #include <linux/string.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <uapi/linux/batman_adv.h>
#include "bat_algo.h" +#include "netlink.h"
char batadv_routing_algo[20] = "BATMAN_IV"; static struct hlist_head batadv_algo_list; @@ -138,3 +144,65 @@ static struct kparam_string batadv_param_string_ra = {
module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, 0644); + +/** + * batadv_algo_dump_entry - fill in information about one supported routing + * algorithm + * @msg: netlink message to be sent back + * @portid: Port to reply to + * @seq: Sequence number of message + * @bat_algo_ops: Algorithm to be dumped + * + * Return: Error number, or 0 on success + */ +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; +} + +/** + * batadv_algo_dump - fill in information about supported routing + * algorithms + * @msg: netlink message to be sent back + * @cb: Parameters to the netlink request + * + * Return: Length of reply message. + */ +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; +} diff --git a/net/batman-adv/bat_algo.h b/net/batman-adv/bat_algo.h index 860d773..3b5b69c 100644 --- a/net/batman-adv/bat_algo.h +++ b/net/batman-adv/bat_algo.h @@ -22,7 +22,9 @@
#include <linux/types.h>
+struct netlink_callback; struct seq_file; +struct sk_buff;
extern char batadv_routing_algo[]; extern struct list_head batadv_hardif_list; @@ -31,5 +33,6 @@ void batadv_algo_init(void); 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);
#endif /* _NET_BATMAN_ADV_BAT_ALGO_H_ */ diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 231f8ea..19fb265 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -32,13 +32,14 @@ #include <net/netlink.h> #include <uapi/linux/batman_adv.h>
+#include "bat_algo.h" #include "hard-interface.h" #include "soft-interface.h" #include "tp_meter.h"
struct sk_buff;
-static struct genl_family batadv_netlink_family = { +struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, .hdrsize = 0, .name = BATADV_NL_NAME, @@ -399,6 +400,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .doit = batadv_netlink_tp_meter_cancel, }, + { + .cmd = BATADV_CMD_GET_ROUTING_ALGOS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_algo_dump, + }, };
/** diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h index 945653a..b399f49 100644 --- a/net/batman-adv/netlink.h +++ b/net/batman-adv/netlink.h @@ -21,6 +21,7 @@ #include "main.h"
#include <linux/types.h> +#include <net/genetlink.h>
void batadv_netlink_register(void); void batadv_netlink_unregister(void); @@ -29,4 +30,6 @@ int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, u8 result, u32 test_time, u64 total_bytes, u32 cookie);
+extern struct genl_family batadv_netlink_family; + #endif /* _NET_BATMAN_ADV_NETLINK_H_ */