wprobe: move measurement task to the kernel, add some configurability (work in progress)
SVN-Revision: 16402
This commit is contained in:
Felix Fietkau
parent
cc12508ee3
commit
f87baeb3e0
9 changed files with 475 additions and 155 deletions
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@ -45,7 +45,7 @@ endef
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define Package/wprobe-export
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SECTION:=net
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CATEGORY:=Network
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DEPENDS:=+kmod-wprobe +libnl-tiny
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DEPENDS:=+wprobe-info
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TITLE:=Wireless measurement data exporter
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endef
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@ -113,8 +113,9 @@ define Package/wprobe-info/install
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endef
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define Package/wprobe-export/install
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$(INSTALL_DIR) $(1)/sbin $(1)/etc/init.d
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$(INSTALL_DIR) $(1)/sbin $(1)/etc/init.d $(1)/etc/config
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$(INSTALL_BIN) ./files/wprobe.init $(1)/etc/init.d/
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$(INSTALL_BIN) ./files/wprobe.config $(1)/etc/config/wprobe
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$(INSTALL_BIN) $(PKG_BUILD_DIR)/exporter/wprobe-export $(1)/sbin/
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endef
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7
package/wprobe/files/wprobe.config
Normal file
7
package/wprobe/files/wprobe.config
Normal file
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@ -0,0 +1,7 @@
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config export
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# uncomment this line to enable ipfix export:
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# option type ipfix
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option ifname ath0
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option host ipfix-col
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option proto tcp
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@ -1,10 +1,11 @@
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#!/bin/sh /etc/rc.common
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START=90
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EXPORTER=/usr/sbin/wprobe-ipfix
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wprobe_ssd() {
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local cfg="$1"; shift
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local cmd="$1"; shift
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start-stop-daemon "$cmd" -p "/var/run/wprobe-$cfg.pid" -b -x /sbin/wprobe-export -m -- "$@"
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start-stop-daemon "$cmd" -p "/var/run/wprobe-$cfg.pid" -b -x "$EXPORTER" -m -- "$@"
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}
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stop_wprobe() {
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@ -13,7 +14,14 @@ stop_wprobe() {
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rm -f "/var/run/wprobe-$cfg.pid"
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}
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start_wprobe() {
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config_wprobe() {
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config_get ifname "$cfg" ifname
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config_get interval "$cfg" interval
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[ -n "$interval" ] || interval=100
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wprobe-info "$ifname" -c -i "$interval"
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}
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start_ipfix() {
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local cfg="$1"
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config_get ifname "$cfg" interface
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config_get host "$cfg" host
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@ -29,9 +37,17 @@ start_wprobe() {
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echo "wprobe-export: missing host or interface name in config $cfg"
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return
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}
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config_wprobe "$cfg"
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wprobe_ssd "$cfg" -S "$proto" -i "$ifname" -c "$host" -p "${port:-4739}"
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}
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start_export() {
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config_get export_type "$cfg" type
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case "$export_type" in
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ipfix) start_ipfix "$cfg";;
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esac
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}
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stop() {
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for f in /var/run/wprobe-*.pid; do
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CFG="${f%%.pid}"
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@ -42,5 +58,6 @@ stop() {
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start() {
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config_load wprobe
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config_foreach start_wprobe wprobe
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config_foreach config_wprobe interface
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[ -x "$EXPORTER" ] && config_foreach start_export export
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}
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@ -65,8 +65,8 @@ static struct wprobe_mapping map_globals[] = {
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};
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static struct wprobe_mapping map_perlink[] = {
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WMAP(IEEE_TX_RATE, "tx_rate", .scale = 10.0f),
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WMAP(IEEE_RX_RATE, "rx_rate", .scale = 10.0f),
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WMAP(IEEE_TX_RATE, "tx_rate"),
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WMAP(IEEE_RX_RATE, "rx_rate"),
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WMAP(RSSI, "rssi"),
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WMAP(SIGNAL, "signal"),
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WMAP(RETRANSMIT_200, "retransmit_200"),
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@ -77,9 +77,6 @@ static struct wprobe_mapping map_perlink[] = {
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static unsigned char link_local[6];
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static char link_default[6];
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static LIST_HEAD(global_attr);
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static LIST_HEAD(link_attr);
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static LIST_HEAD(links);
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static int nfields = 0;
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#define FOKUS_USERID 12325
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@ -166,20 +163,20 @@ add_template_fields(ipfix_t *handle, ipfix_template_t *t, struct wprobe_mapping
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}
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static void
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wprobe_dump_data(ipfix_t *ipfixh, ipfix_template_t *ipfixt, const char *ifname, struct list_head *gl, struct list_head *ll, struct list_head *ls)
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wprobe_dump_data(ipfix_t *ipfixh, ipfix_template_t *ipfixt, struct wprobe_iface *dev)
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{
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struct wprobe_link *link;
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wprobe_update_links(ifname, ls);
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wprobe_request_data(ifname, gl, NULL, 2);
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if (list_empty(ls)) {
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wprobe_update_links(dev);
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wprobe_request_data(dev, NULL);
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if (list_empty(&dev->links)) {
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g_data.addrs[1] = link_default;
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ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
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ipfix_export_flush(ipfixh);
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}
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list_for_each_entry(link, ls, list) {
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list_for_each_entry(link, &dev->links, list) {
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g_data.addrs[1] = link->addr;
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wprobe_request_data(ifname, ll, link->addr, 2);
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wprobe_request_data(dev, link->addr);
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ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
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ipfix_export_flush(ipfixh);
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}
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@ -187,6 +184,7 @@ wprobe_dump_data(ipfix_t *ipfixh, ipfix_template_t *ipfixt, const char *ifname,
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int main ( int argc, char **argv )
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{
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struct wprobe_iface *dev = NULL;
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ipfix_template_t *ipfixt = NULL;
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ipfix_t *ipfixh = NULL;
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int protocol = IPFIX_PROTO_TCP;
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@ -254,20 +252,14 @@ int main ( int argc, char **argv )
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return -1;
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}
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if (wprobe_init() != 0) {
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fprintf(stderr, "wprobe init failed\n");
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return -1;
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}
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wprobe_dump_attributes(ifname, false, &global_attr, (char *) link_local);
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wprobe_dump_attributes(ifname, true, &link_attr, NULL);
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if (list_empty(&global_attr) && list_empty(&link_attr)) {
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dev = wprobe_get_dev(ifname);
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if (!dev || (list_empty(&dev->global_attr) && list_empty(&dev->link_attr))) {
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fprintf(stderr, "Cannot connect to wprobe on interface '%s'\n", ifname);
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return -1;
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}
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match_template(map_globals, ARRAY_SIZE(map_globals), &global_attr);
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match_template(map_perlink, ARRAY_SIZE(map_perlink), &link_attr);
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match_template(map_globals, ARRAY_SIZE(map_globals), &dev->global_attr);
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match_template(map_perlink, ARRAY_SIZE(map_perlink), &dev->link_attr);
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if (nfields == 0) {
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fprintf(stderr, "No usable attributes found\n");
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return -1;
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@ -300,14 +292,8 @@ int main ( int argc, char **argv )
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add_template_fields(ipfixh, ipfixt, map_perlink, ARRAY_SIZE(map_perlink));
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while (!do_close) {
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usleep(100 * 1000);
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wprobe_measure(ifname);
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if (i-- > 0)
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continue;
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i = 10;
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wprobe_dump_data(ipfixh, ipfixt, ifname, &global_attr, &link_attr, &links);
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sleep(1);
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wprobe_dump_data(ipfixh, ipfixt, dev);
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}
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ipfix_delete_template( ipfixh, ipfixt );
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@ -32,13 +32,12 @@
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*
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* @WPROBE_ATTR_INTERFACE: interface name to process query on (NLA_STRING)
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* @WPROBE_ATTR_MAC: mac address (used for wireless links) (NLA_STRING)
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* @WPROBE_ATTR_FLAGS: interface/link/attribute flags (see enum wprobe_flags) (NLA_U32)
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* @WPROBE_ATTR_DURATION: sampling duration (in milliseconds) (NLA_MSECS)
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* @WPROBE_ATTR_FLAGS: interface/link/attribute flags (see enum wprobe_flags) (NLA_U32)a
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* @WPROBE_ATTR_DURATION: sampling duration (in milliseconds) (NLA_MSECS)
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*
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* @WPROBE_ATTR_ID: attribute id (NLA_U32)
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* @WPROBE_ATTR_NAME: attribute name (NLA_STRING)
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* @WPROBE_ATTR_TYPE: attribute type (NLA_U8)
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* @WPROBE_ATTR_SCALE: attribute scale factor (NLA_U32)
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*
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* attribute values:
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*
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@ -56,22 +55,29 @@
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* @WPROBE_VAL_SUM: sum of all samples
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* @WPROBE_VAL_SUM_SQ: sum of all samples^2
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* @WPROBE_VAL_SAMPLES: number of samples
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* @WPROBE_VAL_SCALE_TIME: last time the samples were scaled down
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*
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* configuration:
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* @WPROBE_ATTR_INTERVAL: (measurement interval in milliseconds) (NLA_MSECS)
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* @WPROBE_ATTR_SAMPLES_MIN: minimum samples to keep during inactivity (NLA_U32)
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* @WPROBE_ATTR_SAMPLES_MAX: maximum samples to keep before scaling down (NLA_U32)
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* @WPROBE_ATTR_SAMPLES_SCALE_M: multiplier for scaling down samples (NLA_U32)
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* @WPROBE_ATTR_SAMPLES_SCALE_D: divisor for scaling down samples (NLA_U32)
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*
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* @WPROBE_ATTR_LAST: unused
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*/
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enum wprobe_attr {
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/* query attributes */
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WPROBE_ATTR_UNSPEC,
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WPROBE_ATTR_INTERFACE,
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WPROBE_ATTR_MAC,
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WPROBE_ATTR_FLAGS,
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WPROBE_ATTR_DURATION,
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WPROBE_ATTR_SCALE,
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/* end of query attributes */
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/* response data */
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WPROBE_ATTR_ID,
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WPROBE_ATTR_NAME,
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WPROBE_ATTR_TYPE,
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WPROBE_ATTR_DURATION,
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/* value type attributes */
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WPROBE_VAL_STRING,
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@ -88,6 +94,14 @@ enum wprobe_attr {
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WPROBE_VAL_SUM,
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WPROBE_VAL_SUM_SQ,
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WPROBE_VAL_SAMPLES,
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WPROBE_VAL_SCALE_TIME,
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/* config attributes */
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WPROBE_ATTR_INTERVAL,
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WPROBE_ATTR_SAMPLES_MIN,
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WPROBE_ATTR_SAMPLES_MAX,
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WPROBE_ATTR_SAMPLES_SCALE_M,
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WPROBE_ATTR_SAMPLES_SCALE_D,
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WPROBE_ATTR_LAST
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};
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@ -117,6 +131,7 @@ enum wprobe_cmd {
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WPROBE_CMD_SET_FLAGS,
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WPROBE_CMD_MEASURE,
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WPROBE_CMD_GET_LINKS,
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WPROBE_CMD_CONFIG,
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WPROBE_CMD_LAST
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};
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@ -192,6 +207,7 @@ struct wprobe_value {
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/* timestamps */
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u64 first, last;
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u64 scale_timestamp;
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};
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/**
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@ -225,7 +241,8 @@ struct wprobe_iface {
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const struct wprobe_item *global_items;
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int n_global_items;
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int (*sync_data)(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure);
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int (*sync_data)(struct wprobe_iface *dev, struct wprobe_link *l,
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struct wprobe_value *val, bool measure);
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void *priv;
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/* handled by the wprobe core */
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@ -234,6 +251,14 @@ struct wprobe_iface {
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spinlock_t lock;
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void *val;
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void *query_val;
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u32 measure_interval;
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struct timer_list measure_timer;
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u32 scale_min;
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u32 scale_max;
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u32 scale_m;
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u32 scale_d;
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};
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#define WPROBE_FILL_BEGIN(_ptr, _list) do { \
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@ -34,6 +34,8 @@
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#define list_for_each_rcu __list_for_each_rcu
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#endif
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#define WPROBE_MIN_INTERVAL 100 /* minimum measurement interval in msecs */
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static struct list_head wprobe_if;
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static spinlock_t wprobe_lock;
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@ -43,10 +45,11 @@ static struct genl_family wprobe_fam = {
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.hdrsize = 0,
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.version = 1,
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/* only the first set of attributes is used for queries */
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.maxattr = WPROBE_ATTR_ID,
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.maxattr = WPROBE_ATTR_LAST,
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};
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static void wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
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static int wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query);
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int
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wprobe_add_link(struct wprobe_iface *s, struct wprobe_link *l, const char *addr)
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@ -81,6 +84,19 @@ wprobe_remove_link(struct wprobe_iface *s, struct wprobe_link *l)
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}
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EXPORT_SYMBOL(wprobe_remove_link);
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static void
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wprobe_measure_timer(unsigned long data)
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{
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struct wprobe_iface *dev = (struct wprobe_iface *) data;
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/* set next measurement interval */
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mod_timer(&dev->measure_timer, jiffies +
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msecs_to_jiffies(dev->measure_interval));
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/* perform measurement */
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wprobe_sync_data(dev, NULL, false);
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}
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int
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wprobe_add_iface(struct wprobe_iface *s)
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{
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@ -93,6 +109,7 @@ wprobe_add_iface(struct wprobe_iface *s)
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BUG_ON(!s->name);
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INIT_LIST_HEAD(&s->list);
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INIT_LIST_HEAD(&s->links);
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setup_timer(&s->measure_timer, wprobe_measure_timer, (unsigned long) s);
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vsize = max(s->n_link_items, s->n_global_items);
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s->val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
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@ -103,6 +120,15 @@ wprobe_add_iface(struct wprobe_iface *s)
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if (!s->query_val)
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goto error;
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/* initialize defaults to be able to handle overflow,
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* user space will need to handle this if it keeps an
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* internal histogram */
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s->scale_min = 20;
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s->scale_max = (1 << 31);
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s->scale_m = 1;
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s->scale_d = 10;
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spin_lock_irqsave(&wprobe_lock, flags);
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list_add_rcu(&s->list, &wprobe_if);
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spin_unlock_irqrestore(&wprobe_lock, flags);
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@ -123,6 +149,7 @@ wprobe_remove_iface(struct wprobe_iface *s)
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BUG_ON(!list_empty(&s->links));
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del_timer_sync(&s->measure_timer);
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spin_lock_irqsave(&wprobe_lock, flags);
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list_del_rcu(&s->list);
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spin_unlock_irqrestore(&wprobe_lock, flags);
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@ -160,7 +187,7 @@ wprobe_get_dev(struct nlattr *attr)
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return dev;
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}
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int
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static int
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wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query)
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{
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struct wprobe_value *val;
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@ -190,11 +217,40 @@ done:
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}
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EXPORT_SYMBOL(wprobe_sync_data);
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static void
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wprobe_scale_stats(struct wprobe_iface *dev, const struct wprobe_item *item,
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struct wprobe_value *val, int n)
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{
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u64 scale_ts = jiffies_64;
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int i;
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for (i = 0; i < n; i++) {
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if (!(item[i].flags & WPROBE_F_KEEPSTAT))
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continue;
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if (val[i].n <= dev->scale_min)
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continue;
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/* FIXME: div_s64 seems to be very imprecise here, even when
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* the values are scaled up */
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val[i].s *= dev->scale_m;
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val[i].s = div_s64(val[i].s, dev->scale_d);
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val[i].ss *= dev->scale_m;
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val[i].ss = div_s64(val[i].ss, dev->scale_d);
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val[i].n = (val[i].n * dev->scale_m) / dev->scale_d;
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val[i].scale_timestamp = scale_ts;
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}
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}
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void
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wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l)
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{
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const struct wprobe_item *item;
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struct wprobe_value *val;
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bool scale_stats = false;
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int i, n;
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if (l) {
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@ -215,6 +271,10 @@ wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l)
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continue;
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val[i].n++;
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if ((item[i].flags & WPROBE_F_KEEPSTAT) &&
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(dev->scale_max > 0) && (val[i].n > dev->scale_max)) {
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scale_stats = true;
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}
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switch(item[i].type) {
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case WPROBE_VAL_S8:
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|
|
@ -249,15 +309,22 @@ wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l)
|
|||
val[i].ss += v * v;
|
||||
val[i].pending = false;
|
||||
}
|
||||
if (scale_stats)
|
||||
wprobe_scale_stats(dev, item, val, n);
|
||||
}
|
||||
EXPORT_SYMBOL(wprobe_update_stats);
|
||||
|
||||
static const struct nla_policy wprobe_policy[WPROBE_ATTR_ID+1] = {
|
||||
static const struct nla_policy wprobe_policy[WPROBE_ATTR_LAST+1] = {
|
||||
[WPROBE_ATTR_INTERFACE] = { .type = NLA_NUL_STRING },
|
||||
[WPROBE_ATTR_MAC] = { .type = NLA_STRING },
|
||||
[WPROBE_ATTR_DURATION] = { .type = NLA_MSECS },
|
||||
[WPROBE_ATTR_FLAGS] = { .type = NLA_U32 },
|
||||
[WPROBE_ATTR_SCALE] = { .type = NLA_U32 },
|
||||
|
||||
/* config */
|
||||
[WPROBE_ATTR_INTERVAL] = { .type = NLA_MSECS },
|
||||
[WPROBE_ATTR_SAMPLES_MIN] = { .type = NLA_U32 },
|
||||
[WPROBE_ATTR_SAMPLES_MAX] = { .type = NLA_U32 },
|
||||
[WPROBE_ATTR_SAMPLES_SCALE_M] = { .type = NLA_U32 },
|
||||
[WPROBE_ATTR_SAMPLES_SCALE_D] = { .type = NLA_U32 },
|
||||
};
|
||||
|
||||
static bool
|
||||
|
|
@ -322,6 +389,7 @@ wprobe_send_item_value(struct sk_buff *msg, struct netlink_callback *cb,
|
|||
NLA_PUT_U64(msg, WPROBE_VAL_SUM, val[i].s);
|
||||
NLA_PUT_U64(msg, WPROBE_VAL_SUM_SQ, val[i].ss);
|
||||
NLA_PUT_U32(msg, WPROBE_VAL_SAMPLES, (u32) val[i].n);
|
||||
NLA_PUT_MSECS(msg, WPROBE_VAL_SCALE_TIME, val[i].scale_timestamp);
|
||||
}
|
||||
done:
|
||||
genlmsg_end(msg, hdr);
|
||||
|
|
@ -432,29 +500,6 @@ wprobe_dump_links(struct sk_buff *skb, struct netlink_callback *cb)
|
|||
done:
|
||||
return err;
|
||||
}
|
||||
static void
|
||||
wprobe_scale_stats(const struct wprobe_item *item, struct wprobe_value *val, int n, u32 flags)
|
||||
{
|
||||
u32 scale = 0;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < n; i++) {
|
||||
if (!(item[i].flags & WPROBE_F_KEEPSTAT))
|
||||
continue;
|
||||
|
||||
/* reset statistics, if requested */
|
||||
if (flags & WPROBE_F_RESET)
|
||||
scale = val[i].n;
|
||||
else if (wprobe_fam.attrbuf[WPROBE_ATTR_SCALE])
|
||||
scale = nla_get_u32(wprobe_fam.attrbuf[WPROBE_ATTR_SCALE]);
|
||||
|
||||
if ((scale > 0) && (val[i].n > scale)) {
|
||||
val[i].s = div_s64(val[i].s, scale);
|
||||
val[i].ss = div_s64(val[i].ss, scale);
|
||||
val[i].n = val[i].n / scale + 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#define WPROBE_F_LINK (1 << 31) /* for internal use */
|
||||
static int
|
||||
|
|
@ -515,7 +560,6 @@ wprobe_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
|
|||
err = wprobe_sync_data(dev, l, true);
|
||||
if (!err)
|
||||
memcpy(dev->query_val, val, n * sizeof(struct wprobe_value));
|
||||
wprobe_scale_stats(item, val, n, flags);
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
|
||||
if (err)
|
||||
|
|
@ -582,6 +626,25 @@ done:
|
|||
}
|
||||
#undef WPROBE_F_LINK
|
||||
|
||||
static int
|
||||
wprobe_update_auto_measurement(struct wprobe_iface *dev, u32 interval)
|
||||
{
|
||||
if (interval && (interval < WPROBE_MIN_INTERVAL))
|
||||
return -EINVAL;
|
||||
|
||||
if (!interval && dev->measure_interval)
|
||||
del_timer_sync(&dev->measure_timer);
|
||||
|
||||
dev->measure_interval = interval;
|
||||
if (!interval)
|
||||
return 0;
|
||||
|
||||
/* kick of a new measurement immediately */
|
||||
mod_timer(&dev->measure_timer, jiffies + 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
wprobe_measure(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
|
|
@ -607,6 +670,75 @@ done:
|
|||
return err;
|
||||
}
|
||||
|
||||
static int
|
||||
wprobe_set_config(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
struct wprobe_iface *dev;
|
||||
unsigned long flags;
|
||||
int err = -ENOENT;
|
||||
u32 scale_min, scale_max;
|
||||
u32 scale_m, scale_d;
|
||||
|
||||
rcu_read_lock();
|
||||
dev = wprobe_get_dev(info->attrs[WPROBE_ATTR_INTERFACE]);
|
||||
if (!dev)
|
||||
goto done_unlocked;
|
||||
|
||||
err = -EINVAL;
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (info->attrs[WPROBE_ATTR_MAC]) {
|
||||
/* not supported yet */
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (info->attrs[WPROBE_ATTR_SAMPLES_MIN] ||
|
||||
info->attrs[WPROBE_ATTR_SAMPLES_MAX]) {
|
||||
if (info->attrs[WPROBE_ATTR_SAMPLES_MIN])
|
||||
scale_min = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_MIN]);
|
||||
else
|
||||
scale_min = dev->scale_min;
|
||||
|
||||
if (info->attrs[WPROBE_ATTR_SAMPLES_MAX])
|
||||
scale_max = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_MAX]);
|
||||
else
|
||||
scale_max = dev->scale_max;
|
||||
|
||||
if ((!scale_min && !scale_max) ||
|
||||
(scale_min && scale_max && (scale_min < scale_max))) {
|
||||
dev->scale_min = scale_min;
|
||||
dev->scale_max = scale_max;
|
||||
} else {
|
||||
goto done;
|
||||
}
|
||||
}
|
||||
|
||||
if (info->attrs[WPROBE_ATTR_SAMPLES_SCALE_M] &&
|
||||
info->attrs[WPROBE_ATTR_SAMPLES_SCALE_D]) {
|
||||
|
||||
scale_m = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_SCALE_M]);
|
||||
scale_d = nla_get_u32(info->attrs[WPROBE_ATTR_SAMPLES_SCALE_D]);
|
||||
|
||||
if (!scale_d || (scale_m > scale_d))
|
||||
goto done;
|
||||
|
||||
dev->scale_m = scale_m;
|
||||
dev->scale_d = scale_d;
|
||||
}
|
||||
|
||||
err = 0;
|
||||
if (info->attrs[WPROBE_ATTR_INTERVAL]) {
|
||||
/* change of measurement interval requested */
|
||||
err = wprobe_update_auto_measurement(dev,
|
||||
(u32) nla_get_u64(info->attrs[WPROBE_ATTR_INTERVAL]));
|
||||
}
|
||||
|
||||
done:
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
done_unlocked:
|
||||
rcu_read_unlock();
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct genl_ops wprobe_ops[] = {
|
||||
{
|
||||
.cmd = WPROBE_CMD_GET_INFO,
|
||||
|
|
@ -627,7 +759,11 @@ static struct genl_ops wprobe_ops[] = {
|
|||
.cmd = WPROBE_CMD_GET_LINKS,
|
||||
.dumpit = wprobe_dump_links,
|
||||
.policy = wprobe_policy,
|
||||
}
|
||||
},
|
||||
{
|
||||
.cmd = WPROBE_CMD_CONFIG,
|
||||
.doit = wprobe_set_config,
|
||||
},
|
||||
};
|
||||
|
||||
static void __exit
|
||||
|
|
|
|||
|
|
@ -64,15 +64,15 @@ wprobe_dump_value(struct wprobe_attribute *attr)
|
|||
|
||||
|
||||
static void
|
||||
wprobe_dump_data(const char *ifname, struct list_head *gl, struct list_head *ll, struct list_head *ls)
|
||||
wprobe_dump_data(struct wprobe_iface *dev)
|
||||
{
|
||||
struct wprobe_attribute *attr;
|
||||
struct wprobe_link *link;
|
||||
bool first = true;
|
||||
|
||||
fprintf(stderr, "\n");
|
||||
wprobe_request_data(ifname, gl, NULL, 2);
|
||||
list_for_each_entry(attr, gl, list) {
|
||||
wprobe_request_data(dev, NULL);
|
||||
list_for_each_entry(attr, &dev->global_attr, list) {
|
||||
fprintf(stderr, (first ?
|
||||
"Global: %s=%s\n" :
|
||||
" %s=%s\n"),
|
||||
|
|
@ -82,10 +82,10 @@ wprobe_dump_data(const char *ifname, struct list_head *gl, struct list_head *ll,
|
|||
first = false;
|
||||
}
|
||||
|
||||
list_for_each_entry(link, ls, list) {
|
||||
list_for_each_entry(link, &dev->links, list) {
|
||||
first = true;
|
||||
wprobe_request_data(ifname, ll, link->addr, 2);
|
||||
list_for_each_entry(attr, ll, list) {
|
||||
wprobe_request_data(dev, link->addr);
|
||||
list_for_each_entry(attr, &dev->link_attr, list) {
|
||||
if (first) {
|
||||
fprintf(stderr,
|
||||
"%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n",
|
||||
|
|
@ -119,57 +119,92 @@ static const char *attr_typestr[] = {
|
|||
|
||||
static int usage(const char *prog)
|
||||
{
|
||||
fprintf(stderr, "Usage: %s <interface>\n", prog);
|
||||
return 1;
|
||||
fprintf(stderr,
|
||||
"Usage: %s <interface> [options]\n"
|
||||
"\n"
|
||||
"Options:\n"
|
||||
" -c: Only apply configuration\n"
|
||||
" -h: This help text\n"
|
||||
" -i <interval>: Set measurement interval\n"
|
||||
" -m: Run measurement loop\n"
|
||||
"\n"
|
||||
, prog);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
static void show_attributes(struct wprobe_iface *dev)
|
||||
{
|
||||
struct wprobe_attribute *attr;
|
||||
list_for_each_entry(attr, &dev->global_attr, list) {
|
||||
fprintf(stderr, "Global attribute: '%s' (%s)\n",
|
||||
attr->name, attr_typestr[attr->type]);
|
||||
}
|
||||
list_for_each_entry(attr, &dev->link_attr, list) {
|
||||
fprintf(stderr, "Link attribute: '%s' (%s)\n",
|
||||
attr->name, attr_typestr[attr->type]);
|
||||
}
|
||||
}
|
||||
|
||||
static void loop_measurement(struct wprobe_iface *dev)
|
||||
{
|
||||
while (1) {
|
||||
sleep(1);
|
||||
wprobe_update_links(dev);
|
||||
wprobe_dump_data(dev);
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
struct wprobe_attribute *attr;
|
||||
struct wprobe_iface *dev;
|
||||
const char *ifname;
|
||||
LIST_HEAD(global_attr);
|
||||
LIST_HEAD(link_attr);
|
||||
LIST_HEAD(links);
|
||||
int i = 0;
|
||||
const char *prog = argv[0];
|
||||
enum {
|
||||
CMD_NONE,
|
||||
CMD_CONFIG,
|
||||
CMD_MEASURE,
|
||||
} cmd = CMD_NONE;
|
||||
int ch;
|
||||
|
||||
if (argc < 2)
|
||||
return usage(argv[0]);
|
||||
if ((argc < 2) || (argv[1][0] == '-'))
|
||||
return usage(prog);
|
||||
|
||||
ifname = argv[1];
|
||||
dev = wprobe_get_dev(ifname);
|
||||
argv++;
|
||||
argc--;
|
||||
|
||||
if (wprobe_init() != 0)
|
||||
return -1;
|
||||
|
||||
wprobe_dump_attributes(ifname, false, &global_attr, NULL);
|
||||
wprobe_dump_attributes(ifname, true, &link_attr, NULL);
|
||||
|
||||
if (list_empty(&global_attr) &&
|
||||
list_empty(&link_attr)) {
|
||||
if (!dev || (list_empty(&dev->global_attr) &&
|
||||
list_empty(&dev->link_attr))) {
|
||||
fprintf(stderr, "Interface '%s' not found\n", ifname);
|
||||
return -1;
|
||||
}
|
||||
|
||||
list_for_each_entry(attr, &global_attr, list) {
|
||||
fprintf(stderr, "Global attribute: '%s' (%s)\n",
|
||||
attr->name, attr_typestr[attr->type]);
|
||||
}
|
||||
list_for_each_entry(attr, &link_attr, list) {
|
||||
fprintf(stderr, "Link attribute: '%s' (%s)\n",
|
||||
attr->name, attr_typestr[attr->type]);
|
||||
while ((ch = getopt(argc, argv, "chi:m")) != -1) {
|
||||
switch(ch) {
|
||||
case 'c':
|
||||
cmd = CMD_CONFIG;
|
||||
break;
|
||||
case 'm':
|
||||
cmd = CMD_MEASURE;
|
||||
break;
|
||||
case 'i':
|
||||
dev->interval = strtoul(optarg, NULL, 10);
|
||||
break;
|
||||
case 'h':
|
||||
default:
|
||||
usage(prog);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
while (1) {
|
||||
usleep(100 * 1000);
|
||||
wprobe_measure(ifname);
|
||||
wprobe_apply_config(dev);
|
||||
if (cmd != CMD_CONFIG)
|
||||
show_attributes(dev);
|
||||
if (cmd == CMD_MEASURE)
|
||||
loop_measurement(dev);
|
||||
|
||||
if (i-- > 0)
|
||||
continue;
|
||||
|
||||
i = 10;
|
||||
wprobe_update_links(ifname, &links);
|
||||
wprobe_dump_data(ifname, &global_attr, &link_attr, &links);
|
||||
}
|
||||
wprobe_free();
|
||||
wprobe_free_dev(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -35,6 +35,7 @@
|
|||
#define DPRINTF(fmt, ...) do {} while (0)
|
||||
#endif
|
||||
|
||||
static int n_devs = 0;
|
||||
static struct nl_sock *handle = NULL;
|
||||
static struct nl_cache *cache = NULL;
|
||||
static struct genl_family *family = NULL;
|
||||
|
|
@ -83,9 +84,16 @@ ack_handler(struct nl_msg *msg, void *arg)
|
|||
}
|
||||
|
||||
|
||||
void
|
||||
static void
|
||||
wprobe_free(void)
|
||||
{
|
||||
/* should not happen */
|
||||
if (n_devs == 0)
|
||||
return;
|
||||
|
||||
if (--n_devs != 0)
|
||||
return;
|
||||
|
||||
if (cache)
|
||||
nl_cache_free(cache);
|
||||
if (handle)
|
||||
|
|
@ -94,11 +102,14 @@ wprobe_free(void)
|
|||
cache = NULL;
|
||||
}
|
||||
|
||||
int
|
||||
static int
|
||||
wprobe_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (n_devs++ > 0)
|
||||
return 0;
|
||||
|
||||
handle = nl_socket_alloc();
|
||||
if (!handle) {
|
||||
DPRINTF("Failed to create handle\n");
|
||||
|
|
@ -233,8 +244,8 @@ save_attribute_handler(struct nl_msg *msg, void *arg)
|
|||
}
|
||||
|
||||
|
||||
int
|
||||
wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr)
|
||||
static int
|
||||
dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr)
|
||||
{
|
||||
struct nl_msg *msg;
|
||||
struct wprobe_attr_cb cb;
|
||||
|
|
@ -255,6 +266,64 @@ nla_put_failure:
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
struct wprobe_iface *
|
||||
wprobe_get_dev(const char *ifname)
|
||||
{
|
||||
struct wprobe_iface *dev;
|
||||
|
||||
if (wprobe_init() != 0)
|
||||
return NULL;
|
||||
|
||||
dev = malloc(sizeof(struct wprobe_iface));
|
||||
if (!dev)
|
||||
return NULL;
|
||||
|
||||
memset(dev, 0, sizeof(struct wprobe_iface));
|
||||
dev->ifname = strdup(ifname);
|
||||
if (!dev->ifname)
|
||||
goto error;
|
||||
|
||||
dev->interval = -1;
|
||||
dev->scale_min = -1;
|
||||
dev->scale_max = -1;
|
||||
dev->scale_m = -1;
|
||||
dev->scale_d = -1;
|
||||
|
||||
INIT_LIST_HEAD(&dev->global_attr);
|
||||
INIT_LIST_HEAD(&dev->link_attr);
|
||||
INIT_LIST_HEAD(&dev->links);
|
||||
|
||||
dump_attributes(ifname, false, &dev->global_attr, NULL);
|
||||
dump_attributes(ifname, true, &dev->link_attr, NULL);
|
||||
|
||||
return dev;
|
||||
|
||||
error:
|
||||
free(dev);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
free_attr_list(struct list_head *list)
|
||||
{
|
||||
struct wprobe_attribute *attr, *tmp;
|
||||
|
||||
list_for_each_entry_safe(attr, tmp, list, list) {
|
||||
list_del(&attr->list);
|
||||
free(attr);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
wprobe_free_dev(struct wprobe_iface *dev)
|
||||
{
|
||||
wprobe_free();
|
||||
free_attr_list(&dev->global_attr);
|
||||
free_attr_list(&dev->link_attr);
|
||||
free((void *)dev->ifname);
|
||||
free(dev);
|
||||
}
|
||||
|
||||
static struct wprobe_link *
|
||||
get_link(struct list_head *list, const char *addr)
|
||||
{
|
||||
|
|
@ -313,7 +382,7 @@ save_link_handler(struct nl_msg *msg, void *arg)
|
|||
|
||||
|
||||
int
|
||||
wprobe_update_links(const char *ifname, struct list_head *list)
|
||||
wprobe_update_links(struct wprobe_iface *dev)
|
||||
{
|
||||
struct wprobe_link *l, *tmp;
|
||||
struct nl_msg *msg;
|
||||
|
|
@ -321,10 +390,10 @@ wprobe_update_links(const char *ifname, struct list_head *list)
|
|||
int err;
|
||||
|
||||
INIT_LIST_HEAD(&cb.old_list);
|
||||
list_splice_init(list, &cb.old_list);
|
||||
cb.list = list;
|
||||
list_splice_init(&dev->links, &cb.old_list);
|
||||
cb.list = &dev->links;
|
||||
|
||||
msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_LINKS, true);
|
||||
msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_LINKS, true);
|
||||
if (!msg)
|
||||
return -ENOMEM;
|
||||
|
||||
|
|
@ -340,16 +409,37 @@ wprobe_update_links(const char *ifname, struct list_head *list)
|
|||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
wprobe_measure(const char *ifname)
|
||||
int
|
||||
wprobe_apply_config(struct wprobe_iface *dev)
|
||||
{
|
||||
struct nl_msg *msg;
|
||||
|
||||
msg = wprobe_new_msg(ifname, WPROBE_CMD_MEASURE, false);
|
||||
msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_CONFIG, false);
|
||||
if (!msg)
|
||||
return;
|
||||
return -ENOMEM;
|
||||
|
||||
if (dev->interval >= 0)
|
||||
NLA_PUT_MSECS(msg, WPROBE_ATTR_INTERVAL, dev->interval);
|
||||
|
||||
wprobe_send_msg(msg, NULL, NULL);
|
||||
return 0;
|
||||
|
||||
nla_put_failure:
|
||||
nlmsg_free(msg);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
int
|
||||
wprobe_measure(struct wprobe_iface *dev)
|
||||
{
|
||||
struct nl_msg *msg;
|
||||
|
||||
msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_MEASURE, false);
|
||||
if (!msg)
|
||||
return -ENOMEM;
|
||||
|
||||
wprobe_send_msg(msg, NULL, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct wprobe_request_cb {
|
||||
|
|
@ -431,6 +521,10 @@ found:
|
|||
if (attr->val.n > 0) {
|
||||
float avg = ((float) attr->val.s) / attr->val.n;
|
||||
float stdev = sqrt((((float) attr->val.ss) / attr->val.n) - (avg * avg));
|
||||
if (isnan(stdev))
|
||||
stdev = 0.0f;
|
||||
if (isnan(avg))
|
||||
avg = 0.0f;
|
||||
attr->val.avg = avg;
|
||||
attr->val.stdev = stdev;
|
||||
}
|
||||
|
|
@ -443,25 +537,24 @@ out:
|
|||
|
||||
|
||||
int
|
||||
wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale)
|
||||
wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr)
|
||||
{
|
||||
struct wprobe_request_cb cb;
|
||||
struct list_head *attrs;
|
||||
struct nl_msg *msg;
|
||||
int err;
|
||||
|
||||
msg = wprobe_new_msg(ifname, WPROBE_CMD_GET_INFO, true);
|
||||
msg = wprobe_new_msg(dev->ifname, WPROBE_CMD_GET_INFO, true);
|
||||
if (!msg)
|
||||
return -ENOMEM;
|
||||
|
||||
if (scale < 0)
|
||||
NLA_PUT_U32(msg, WPROBE_ATTR_FLAGS, WPROBE_F_RESET);
|
||||
else if (scale > 0)
|
||||
NLA_PUT_U32(msg, WPROBE_ATTR_SCALE, scale);
|
||||
|
||||
if (addr)
|
||||
if (addr) {
|
||||
attrs = &dev->link_attr;
|
||||
NLA_PUT(msg, WPROBE_ATTR_MAC, 6, addr);
|
||||
} else {
|
||||
attrs = &dev->global_attr;
|
||||
}
|
||||
|
||||
nla_put_failure:
|
||||
INIT_LIST_HEAD(&cb.old_list);
|
||||
list_splice_init(attrs, &cb.old_list);
|
||||
cb.list = attrs;
|
||||
|
|
@ -469,6 +562,10 @@ nla_put_failure:
|
|||
err = wprobe_send_msg(msg, save_attrdata_handler, &cb);
|
||||
list_splice(&cb.old_list, attrs->prev);
|
||||
return err;
|
||||
|
||||
nla_put_failure:
|
||||
nlmsg_free(msg);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -87,15 +87,21 @@ struct wprobe_link {
|
|||
unsigned char addr[6];
|
||||
};
|
||||
|
||||
/**
|
||||
* wprobe_init: initialize internal data structures and connect to the wprobe netlink api
|
||||
*/
|
||||
extern int wprobe_init(void);
|
||||
struct wprobe_iface {
|
||||
const char *ifname;
|
||||
char addr[6];
|
||||
|
||||
/**
|
||||
* wprobe_free: free all internally allocated data structures
|
||||
*/
|
||||
extern void wprobe_free(void);
|
||||
struct list_head global_attr;
|
||||
struct list_head link_attr;
|
||||
struct list_head links;
|
||||
|
||||
/* config */
|
||||
int interval;
|
||||
int scale_min;
|
||||
int scale_max;
|
||||
int scale_m;
|
||||
int scale_d;
|
||||
};
|
||||
|
||||
/**
|
||||
* wprobe_update_links: get a list of all link partners
|
||||
|
|
@ -105,7 +111,7 @@ extern void wprobe_free(void);
|
|||
* when wprobe_update_links is called multiple times, the linked list
|
||||
* is updated with new link partners, old entries are automatically expired
|
||||
*/
|
||||
extern int wprobe_update_links(const char *ifname, struct list_head *list);
|
||||
extern int wprobe_update_links(struct wprobe_iface *dev);
|
||||
|
||||
/**
|
||||
* wprobe_measure: start a measurement request for all global attributes
|
||||
|
|
@ -115,29 +121,39 @@ extern int wprobe_update_links(const char *ifname, struct list_head *list);
|
|||
* it may be desirable to control the sampling interval from user space
|
||||
* you can use this function to do that.
|
||||
*/
|
||||
extern void wprobe_measure(const char *ifname);
|
||||
extern int wprobe_measure(struct wprobe_iface *dev);
|
||||
|
||||
/**
|
||||
* wprobe_dump_attributes: create a linked list of available attributes
|
||||
* wprobe_get_dev: get device information
|
||||
* @ifname: name of the wprobe interface
|
||||
* @link: false: get the list of global attributes; true: get the list of per-link attributes
|
||||
* @list: linked list to store the attributes in
|
||||
* @addr: buffer to store the interface's mac address in (optional)
|
||||
*
|
||||
* attributes must be freed by the caller
|
||||
* queries the wprobe interface for all attributes
|
||||
* must be freed with wprobe_free_dev
|
||||
*/
|
||||
extern int wprobe_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr);
|
||||
extern struct wprobe_iface *wprobe_get_dev(const char *ifname);
|
||||
|
||||
/**
|
||||
* wprobe_get_dev: free all device information
|
||||
* @dev: wprobe device structure
|
||||
*/
|
||||
extern void wprobe_free_dev(struct wprobe_iface *dev);
|
||||
|
||||
/**
|
||||
* wprobe_apply_config: apply configuration data
|
||||
* @dev: wprobe device structure
|
||||
*
|
||||
* uploads all configuration values from @dev that are not set to -1
|
||||
*/
|
||||
extern int wprobe_apply_config(struct wprobe_iface *dev);
|
||||
|
||||
/**
|
||||
* wprobe_request_data: request new sampling values for the given list of attributes
|
||||
* @ifname: name of the wprobe interface
|
||||
* @attrs: attribute list
|
||||
* @dev: wprobe device structure
|
||||
* @addr: (optional) mac address of the link partner
|
||||
* @scale: scale down values by a factor (scale < 0: reset statistics entirely)
|
||||
*
|
||||
* if addr is unset, attrs must point to the list of global attributes,
|
||||
* if addr is set, attrs must point to the list of per-link attributes
|
||||
* if addr is unset, global values are stored in the global attributes list
|
||||
* if addr is set, per-link values for the given address are stored in the link attributes list
|
||||
*/
|
||||
extern int wprobe_request_data(const char *ifname, struct list_head *attrs, const unsigned char *addr, int scale);
|
||||
extern int wprobe_request_data(struct wprobe_iface *dev, const unsigned char *addr);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue