define Package/wprobe-export
SECTION:=net
CATEGORY:=Network
- DEPENDS:=+kmod-wprobe +libnl-tiny
+ DEPENDS:=+wprobe-info
TITLE:=Wireless measurement data exporter
endef
endef
define Package/wprobe-export/install
- $(INSTALL_DIR) $(1)/sbin $(1)/etc/init.d
+ $(INSTALL_DIR) $(1)/sbin $(1)/etc/init.d $(1)/etc/config
$(INSTALL_BIN) ./files/wprobe.init $(1)/etc/init.d/
+ $(INSTALL_BIN) ./files/wprobe.config $(1)/etc/config/wprobe
$(INSTALL_BIN) $(PKG_BUILD_DIR)/exporter/wprobe-export $(1)/sbin/
endef
--- /dev/null
+config export
+ # uncomment this line to enable ipfix export:
+ # option type ipfix
+ option ifname ath0
+ option host ipfix-col
+ option proto tcp
+
#!/bin/sh /etc/rc.common
START=90
+EXPORTER=/usr/sbin/wprobe-ipfix
wprobe_ssd() {
local cfg="$1"; shift
local cmd="$1"; shift
- start-stop-daemon "$cmd" -p "/var/run/wprobe-$cfg.pid" -b -x /sbin/wprobe-export -m -- "$@"
+ start-stop-daemon "$cmd" -p "/var/run/wprobe-$cfg.pid" -b -x "$EXPORTER" -m -- "$@"
}
stop_wprobe() {
rm -f "/var/run/wprobe-$cfg.pid"
}
-start_wprobe() {
+config_wprobe() {
+ config_get ifname "$cfg" ifname
+ config_get interval "$cfg" interval
+ [ -n "$interval" ] || interval=100
+ wprobe-info "$ifname" -c -i "$interval"
+}
+
+start_ipfix() {
local cfg="$1"
config_get ifname "$cfg" interface
config_get host "$cfg" host
echo "wprobe-export: missing host or interface name in config $cfg"
return
}
+ config_wprobe "$cfg"
wprobe_ssd "$cfg" -S "$proto" -i "$ifname" -c "$host" -p "${port:-4739}"
}
+start_export() {
+ config_get export_type "$cfg" type
+ case "$export_type" in
+ ipfix) start_ipfix "$cfg";;
+ esac
+}
+
stop() {
for f in /var/run/wprobe-*.pid; do
CFG="${f%%.pid}"
start() {
config_load wprobe
- config_foreach start_wprobe wprobe
+ config_foreach config_wprobe interface
+ [ -x "$EXPORTER" ] && config_foreach start_export export
}
};
static struct wprobe_mapping map_perlink[] = {
- WMAP(IEEE_TX_RATE, "tx_rate", .scale = 10.0f),
- WMAP(IEEE_RX_RATE, "rx_rate", .scale = 10.0f),
+ WMAP(IEEE_TX_RATE, "tx_rate"),
+ WMAP(IEEE_RX_RATE, "rx_rate"),
WMAP(RSSI, "rssi"),
WMAP(SIGNAL, "signal"),
WMAP(RETRANSMIT_200, "retransmit_200"),
static unsigned char link_local[6];
static char link_default[6];
-static LIST_HEAD(global_attr);
-static LIST_HEAD(link_attr);
-static LIST_HEAD(links);
static int nfields = 0;
#define FOKUS_USERID 12325
}
static void
-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)
+wprobe_dump_data(ipfix_t *ipfixh, ipfix_template_t *ipfixt, struct wprobe_iface *dev)
{
struct wprobe_link *link;
- wprobe_update_links(ifname, ls);
- wprobe_request_data(ifname, gl, NULL, 2);
- if (list_empty(ls)) {
+ wprobe_update_links(dev);
+ wprobe_request_data(dev, NULL);
+ if (list_empty(&dev->links)) {
g_data.addrs[1] = link_default;
ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
ipfix_export_flush(ipfixh);
}
- list_for_each_entry(link, ls, list) {
+ list_for_each_entry(link, &dev->links, list) {
g_data.addrs[1] = link->addr;
- wprobe_request_data(ifname, ll, link->addr, 2);
+ wprobe_request_data(dev, link->addr);
ipfix_export_array(ipfixh, ipfixt, g_data.maxfields, g_data.addrs, g_data.lens);
ipfix_export_flush(ipfixh);
}
int main ( int argc, char **argv )
{
+ struct wprobe_iface *dev = NULL;
ipfix_template_t *ipfixt = NULL;
ipfix_t *ipfixh = NULL;
int protocol = IPFIX_PROTO_TCP;
return -1;
}
- if (wprobe_init() != 0) {
- fprintf(stderr, "wprobe init failed\n");
- return -1;
- }
-
- wprobe_dump_attributes(ifname, false, &global_attr, (char *) link_local);
- wprobe_dump_attributes(ifname, true, &link_attr, NULL);
- if (list_empty(&global_attr) && list_empty(&link_attr)) {
+ dev = wprobe_get_dev(ifname);
+ if (!dev || (list_empty(&dev->global_attr) && list_empty(&dev->link_attr))) {
fprintf(stderr, "Cannot connect to wprobe on interface '%s'\n", ifname);
return -1;
}
- match_template(map_globals, ARRAY_SIZE(map_globals), &global_attr);
- match_template(map_perlink, ARRAY_SIZE(map_perlink), &link_attr);
+ match_template(map_globals, ARRAY_SIZE(map_globals), &dev->global_attr);
+ match_template(map_perlink, ARRAY_SIZE(map_perlink), &dev->link_attr);
if (nfields == 0) {
fprintf(stderr, "No usable attributes found\n");
return -1;
add_template_fields(ipfixh, ipfixt, map_perlink, ARRAY_SIZE(map_perlink));
while (!do_close) {
- usleep(100 * 1000);
- wprobe_measure(ifname);
-
- if (i-- > 0)
- continue;
-
- i = 10;
- wprobe_dump_data(ipfixh, ipfixt, ifname, &global_attr, &link_attr, &links);
+ sleep(1);
+ wprobe_dump_data(ipfixh, ipfixt, dev);
}
ipfix_delete_template( ipfixh, ipfixt );
*
* @WPROBE_ATTR_INTERFACE: interface name to process query on (NLA_STRING)
* @WPROBE_ATTR_MAC: mac address (used for wireless links) (NLA_STRING)
- * @WPROBE_ATTR_FLAGS: interface/link/attribute flags (see enum wprobe_flags) (NLA_U32)
- * @WPROBE_ATTR_DURATION: sampling duration (in milliseconds) (NLA_MSECS)
+ * @WPROBE_ATTR_FLAGS: interface/link/attribute flags (see enum wprobe_flags) (NLA_U32)a
+ * @WPROBE_ATTR_DURATION: sampling duration (in milliseconds) (NLA_MSECS)
*
* @WPROBE_ATTR_ID: attribute id (NLA_U32)
* @WPROBE_ATTR_NAME: attribute name (NLA_STRING)
* @WPROBE_ATTR_TYPE: attribute type (NLA_U8)
- * @WPROBE_ATTR_SCALE: attribute scale factor (NLA_U32)
*
* attribute values:
*
* @WPROBE_VAL_SUM: sum of all samples
* @WPROBE_VAL_SUM_SQ: sum of all samples^2
* @WPROBE_VAL_SAMPLES: number of samples
+ * @WPROBE_VAL_SCALE_TIME: last time the samples were scaled down
+ *
+ * configuration:
+ * @WPROBE_ATTR_INTERVAL: (measurement interval in milliseconds) (NLA_MSECS)
+ * @WPROBE_ATTR_SAMPLES_MIN: minimum samples to keep during inactivity (NLA_U32)
+ * @WPROBE_ATTR_SAMPLES_MAX: maximum samples to keep before scaling down (NLA_U32)
+ * @WPROBE_ATTR_SAMPLES_SCALE_M: multiplier for scaling down samples (NLA_U32)
+ * @WPROBE_ATTR_SAMPLES_SCALE_D: divisor for scaling down samples (NLA_U32)
*
* @WPROBE_ATTR_LAST: unused
*/
enum wprobe_attr {
+ /* query attributes */
WPROBE_ATTR_UNSPEC,
WPROBE_ATTR_INTERFACE,
WPROBE_ATTR_MAC,
WPROBE_ATTR_FLAGS,
- WPROBE_ATTR_DURATION,
- WPROBE_ATTR_SCALE,
- /* end of query attributes */
/* response data */
WPROBE_ATTR_ID,
WPROBE_ATTR_NAME,
WPROBE_ATTR_TYPE,
+ WPROBE_ATTR_DURATION,
/* value type attributes */
WPROBE_VAL_STRING,
WPROBE_VAL_SUM,
WPROBE_VAL_SUM_SQ,
WPROBE_VAL_SAMPLES,
+ WPROBE_VAL_SCALE_TIME,
+
+ /* config attributes */
+ WPROBE_ATTR_INTERVAL,
+ WPROBE_ATTR_SAMPLES_MIN,
+ WPROBE_ATTR_SAMPLES_MAX,
+ WPROBE_ATTR_SAMPLES_SCALE_M,
+ WPROBE_ATTR_SAMPLES_SCALE_D,
WPROBE_ATTR_LAST
};
WPROBE_CMD_SET_FLAGS,
WPROBE_CMD_MEASURE,
WPROBE_CMD_GET_LINKS,
+ WPROBE_CMD_CONFIG,
WPROBE_CMD_LAST
};
/* timestamps */
u64 first, last;
+ u64 scale_timestamp;
};
/**
const struct wprobe_item *global_items;
int n_global_items;
- int (*sync_data)(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure);
+ int (*sync_data)(struct wprobe_iface *dev, struct wprobe_link *l,
+ struct wprobe_value *val, bool measure);
void *priv;
/* handled by the wprobe core */
spinlock_t lock;
void *val;
void *query_val;
+
+ u32 measure_interval;
+ struct timer_list measure_timer;
+
+ u32 scale_min;
+ u32 scale_max;
+ u32 scale_m;
+ u32 scale_d;
};
#define WPROBE_FILL_BEGIN(_ptr, _list) do { \
#define list_for_each_rcu __list_for_each_rcu
#endif
+#define WPROBE_MIN_INTERVAL 100 /* minimum measurement interval in msecs */
+
static struct list_head wprobe_if;
static spinlock_t wprobe_lock;
.hdrsize = 0,
.version = 1,
/* only the first set of attributes is used for queries */
- .maxattr = WPROBE_ATTR_ID,
+ .maxattr = WPROBE_ATTR_LAST,
};
static void wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l);
+static int wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query);
int
wprobe_add_link(struct wprobe_iface *s, struct wprobe_link *l, const char *addr)
}
EXPORT_SYMBOL(wprobe_remove_link);
+static void
+wprobe_measure_timer(unsigned long data)
+{
+ struct wprobe_iface *dev = (struct wprobe_iface *) data;
+
+ /* set next measurement interval */
+ mod_timer(&dev->measure_timer, jiffies +
+ msecs_to_jiffies(dev->measure_interval));
+
+ /* perform measurement */
+ wprobe_sync_data(dev, NULL, false);
+}
+
int
wprobe_add_iface(struct wprobe_iface *s)
{
BUG_ON(!s->name);
INIT_LIST_HEAD(&s->list);
INIT_LIST_HEAD(&s->links);
+ setup_timer(&s->measure_timer, wprobe_measure_timer, (unsigned long) s);
vsize = max(s->n_link_items, s->n_global_items);
s->val = kzalloc(sizeof(struct wprobe_value) * vsize, GFP_ATOMIC);
if (!s->query_val)
goto error;
+ /* initialize defaults to be able to handle overflow,
+ * user space will need to handle this if it keeps an
+ * internal histogram */
+ s->scale_min = 20;
+ s->scale_max = (1 << 31);
+
+ s->scale_m = 1;
+ s->scale_d = 10;
+
spin_lock_irqsave(&wprobe_lock, flags);
list_add_rcu(&s->list, &wprobe_if);
spin_unlock_irqrestore(&wprobe_lock, flags);
BUG_ON(!list_empty(&s->links));
+ del_timer_sync(&s->measure_timer);
spin_lock_irqsave(&wprobe_lock, flags);
list_del_rcu(&s->list);
spin_unlock_irqrestore(&wprobe_lock, flags);
return dev;
}
-int
+static int
wprobe_sync_data(struct wprobe_iface *dev, struct wprobe_link *l, bool query)
{
struct wprobe_value *val;
}
EXPORT_SYMBOL(wprobe_sync_data);
+static void
+wprobe_scale_stats(struct wprobe_iface *dev, const struct wprobe_item *item,
+ struct wprobe_value *val, int n)
+{
+ u64 scale_ts = jiffies_64;
+ int i;
+
+ for (i = 0; i < n; i++) {
+ if (!(item[i].flags & WPROBE_F_KEEPSTAT))
+ continue;
+
+ if (val[i].n <= dev->scale_min)
+ continue;
+
+ /* FIXME: div_s64 seems to be very imprecise here, even when
+ * the values are scaled up */
+ val[i].s *= dev->scale_m;
+ val[i].s = div_s64(val[i].s, dev->scale_d);
+
+ val[i].ss *= dev->scale_m;
+ val[i].ss = div_s64(val[i].ss, dev->scale_d);
+
+ val[i].n = (val[i].n * dev->scale_m) / dev->scale_d;
+ val[i].scale_timestamp = scale_ts;
+ }
+}
+
+
void
wprobe_update_stats(struct wprobe_iface *dev, struct wprobe_link *l)
{
const struct wprobe_item *item;
struct wprobe_value *val;
+ bool scale_stats = false;
int i, n;
if (l) {
continue;
val[i].n++;
+ if ((item[i].flags & WPROBE_F_KEEPSTAT) &&
+ (dev->scale_max > 0) && (val[i].n > dev->scale_max)) {
+ scale_stats = true;
+ }
switch(item[i].type) {
case WPROBE_VAL_S8:
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
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);
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
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)
}
#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)
{
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,
.cmd = WPROBE_CMD_GET_LINKS,
.dumpit = wprobe_dump_links,
.policy = wprobe_policy,
- }
+ },
+ {
+ .cmd = WPROBE_CMD_CONFIG,
+ .doit = wprobe_set_config,
+ },
};
static void __exit
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"),
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",
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);
}
-int main(int argc, char **argv)
+static void show_attributes(struct wprobe_iface *dev)
{
struct wprobe_attribute *attr;
- const char *ifname;
- LIST_HEAD(global_attr);
- LIST_HEAD(link_attr);
- LIST_HEAD(links);
- int i = 0;
+ 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]);
+ }
+}
- if (argc < 2)
- return usage(argv[0]);
+static void loop_measurement(struct wprobe_iface *dev)
+{
+ while (1) {
+ sleep(1);
+ wprobe_update_links(dev);
+ wprobe_dump_data(dev);
+ }
+}
- ifname = argv[1];
+int main(int argc, char **argv)
+{
+ struct wprobe_iface *dev;
+ const char *ifname;
+ const char *prog = argv[0];
+ enum {
+ CMD_NONE,
+ CMD_CONFIG,
+ CMD_MEASURE,
+ } cmd = CMD_NONE;
+ int ch;
- if (wprobe_init() != 0)
- return -1;
+ if ((argc < 2) || (argv[1][0] == '-'))
+ return usage(prog);
- wprobe_dump_attributes(ifname, false, &global_attr, NULL);
- wprobe_dump_attributes(ifname, true, &link_attr, NULL);
+ ifname = argv[1];
+ dev = wprobe_get_dev(ifname);
+ argv++;
+ argc--;
- 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);
-
- if (i-- > 0)
- continue;
+ wprobe_apply_config(dev);
+ if (cmd != CMD_CONFIG)
+ show_attributes(dev);
+ if (cmd == CMD_MEASURE)
+ loop_measurement(dev);
- i = 10;
- wprobe_update_links(ifname, &links);
- wprobe_dump_data(ifname, &global_attr, &link_attr, &links);
- }
- wprobe_free();
+ wprobe_free_dev(dev);
return 0;
}
#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;
}
-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)
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");
}
-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;
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)
{
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;
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;
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 {
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;
}
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;
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;
}
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
* 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
* 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 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_dump_attributes(const char *ifname, bool link, struct list_head *list, char *addr);
+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
projects / openwrt / svn-archive / archive.git / commitdiff