B.A.T.M.A.N. V introduced a hard interface specific setting called throughput. It defines the throughput value to be used by B.A.T.M.A.N. V when estimating the link throughput using this interface. If the value is set to 0 then batman-adv will try to estimate the throughput by itself.
Signed-off-by: Sven Eckelmann sven@narfation.org --- Makefile | 1 + README.rst | 17 +++++++ man/batctl.8 | 6 +++ throughput_override.c | 113 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 137 insertions(+) create mode 100644 throughput_override.c
diff --git a/Makefile b/Makefile index f071da2..e3747a2 100755 --- a/Makefile +++ b/Makefile @@ -67,6 +67,7 @@ $(eval $(call add_command,ping,y)) $(eval $(call add_command,routing_algo,y)) $(eval $(call add_command,statistics,y)) $(eval $(call add_command,tcpdump,y)) +$(eval $(call add_command,throughput_override,y)) $(eval $(call add_command,throughputmeter,y)) $(eval $(call add_command,traceroute,y)) $(eval $(call add_command,transglobal,y)) diff --git a/README.rst b/README.rst index 92983aa..128f539 100644 --- a/README.rst +++ b/README.rst @@ -402,6 +402,23 @@ Example:: 200
+batctl throughput override +========================== + +display or modify the throughput override in kbit/s for hard interface + +Usage:: + + batctl hardif $hardif throughput_override|to [kbit] + +Example:: + + $ batctl hardif eth0 throughput_override 15000 + $ batctl hardif eth0 throughput_override 15mbit + $ batctl hardif eth0 throughput_override + 15.0 MBit + + batctl loglevel ===============
diff --git a/man/batctl.8 b/man/batctl.8 index 690da02..b821896 100644 --- a/man/batctl.8 +++ b/man/batctl.8 @@ -203,6 +203,12 @@ supported routing algorithms are displayed. Otherwise the parameter is used to select the routing algorithm for the following batX interface to be created. .br +.IP "\fBhardif <hardif>\fP \fBthroughput_override|to\fP [\fBbandwidth\fP]\fP" +If no parameter is given the current througput override is displayed otherwise +the parameter is used to set the throughput override for the specified hard +interface. +Just enter any number (optionally followed by "kbit" or "mbit"). +.br .IP "\fBisolation_mark\fP|\fBmark\fP" If no parameter is given the current isolation mark value is displayed. Otherwise the parameter is used to set or unset the isolation mark used by the diff --git a/throughput_override.c b/throughput_override.c new file mode 100644 index 0000000..28a6588 --- /dev/null +++ b/throughput_override.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2009-2019 B.A.T.M.A.N. contributors: + * + * Marek Lindner mareklindner@neomailbox.ch + * + * License-Filename: LICENSES/preferred/GPL-2.0 + */ + +#include <errno.h> +#include <stddef.h> +#include <stdint.h> +#include <string.h> + +#include "functions.h" +#include "main.h" +#include "sys.h" + +static struct throughput_override_data { + uint32_t throughput_override; +} throughput_override; + +static int parse_throughput_override(struct state *state, int argc, char *argv[]) +{ + struct settings_data *settings = state->cmd->arg; + struct throughput_override_data *data = settings->data; + bool ret; + + if (argc != 2) { + fprintf(stderr, "Error - incorrect number of arguments (expected 1)\n"); + return -EINVAL; + } + + ret = parse_throughput(argv[1], "throughput override", + &data->throughput_override); + if (!ret) + return -EINVAL; + + return 0; +} + +static int print_throughput_override(struct nl_msg *msg, void *arg) +{ + struct nlattr *attrs[BATADV_ATTR_MAX + 1]; + struct nlmsghdr *nlh = nlmsg_hdr(msg); + struct genlmsghdr *ghdr; + int *result = arg; + uint32_t mbit; + + if (!genlmsg_valid_hdr(nlh, 0)) + return NL_OK; + + ghdr = nlmsg_data(nlh); + + if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0), + genlmsg_len(ghdr), batadv_netlink_policy)) { + return NL_OK; + } + + if (!attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]) + return NL_OK; + + mbit = nla_get_u32(attrs[BATADV_ATTR_THROUGHPUT_OVERRIDE]); + printf("%u.%u MBit\n", mbit / 10, mbit % 10); + + *result = 0; + return NL_STOP; +} + +static int get_attrs_elp_isolation(struct nl_msg *msg, void *arg) +{ + struct state *state = arg; + + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, state->hif); + + return 0; +} + +static int get_throughput_override(struct state *state) +{ + return sys_simple_nlquery(state, BATADV_CMD_GET_HARDIF, + get_attrs_elp_isolation, print_throughput_override); +} + +static int set_attrs_throughput_override(struct nl_msg *msg, void *arg) +{ + struct state *state = arg; + struct settings_data *settings = state->cmd->arg; + struct throughput_override_data *data = settings->data; + + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, state->hif); + nla_put_u32(msg, BATADV_ATTR_THROUGHPUT_OVERRIDE, data->throughput_override); + + return 0; +} + +static int set_throughput_override(struct state *state) +{ + return sys_simple_nlquery(state, BATADV_CMD_SET_HARDIF, + set_attrs_throughput_override, NULL); +} + +static struct settings_data batctl_settings_throughput_override = { + .sysfs_name = "throughput_override", + .data = &throughput_override, + .parse = parse_throughput_override, + .netlink_get = get_throughput_override, + .netlink_set = set_throughput_override, +}; + +COMMAND_NAMED(SUBCOMMAND_HIF, throughput_override, "to", handle_sys_setting, + COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK, + &batctl_settings_throughput_override, + "[mbit] \tdisplay or modify throughput_override setting");