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add can_get_device_stats() 

When using libsocketcan on git://git.pengutronix.de/git/tools/libsocketcan.git,
I kind of missed a method to fetch the can device statistics.
This patch adds that functionality.
I think this is the proper library to put such function.

Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
pull/106/head^2
Kurt Van Dijck 2011-10-12 14:55:13 +02:00 committed by Marc Kleine-Budde
parent 42a3b65198
commit 6db5d772b4
2 changed files with 34 additions and 0 deletions
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1
include/libsocketcan.h
View File

@ -45,5 +45,6 @@ int can_get_state(const char *name, int *state);
int can_get_clock(const char *name, struct can_clock *clock); int can_get_clock(const char *name, struct can_clock *clock);
int can_get_bittiming_const(const char *name, struct can_bittiming_const *btc); int can_get_bittiming_const(const char *name, struct can_bittiming_const *btc);
int can_get_berr_counter(const char *name, struct can_berr_counter *bc); int can_get_berr_counter(const char *name, struct can_berr_counter *bc);
int can_get_device_stats(const char *name, struct can_device_stats *cds);
#endif #endif

33
src/libsocketcan.c
View File

@ -53,6 +53,7 @@
#define GET_CLOCK 5 #define GET_CLOCK 5
#define GET_BITTIMING_CONST 6 #define GET_BITTIMING_CONST 6
#define GET_BERR_COUNTER 7 #define GET_BERR_COUNTER 7
#define GET_XSTATS 8
struct get_req { struct get_req {
struct nlmsghdr n; struct nlmsghdr n;
@ -386,6 +387,17 @@ static int do_get_nl_link(int fd, __u8 acquire, const char *name, void *res)
else else
continue; continue;
if (acquire == GET_XSTATS) {
if (!linkinfo[IFLA_INFO_XSTATS])
fprintf(stderr, "no can statistics found\n");
else {
memcpy(res, RTA_DATA(linkinfo[IFLA_INFO_XSTATS]),
sizeof(struct can_device_stats));
ret = 0;
}
continue;
}
if (!linkinfo[IFLA_INFO_DATA]) { if (!linkinfo[IFLA_INFO_DATA]) {
fprintf(stderr, "no link data found\n"); fprintf(stderr, "no link data found\n");
return ret; return ret;
@ -1121,3 +1133,24 @@ int can_get_berr_counter(const char *name, struct can_berr_counter *bc)
{ {
return get_link(name, GET_BERR_COUNTER, bc); return get_link(name, GET_BERR_COUNTER, bc);
} }
/**
* @ingroup extern
* can_get_device_stats - get the can_device_stats.
*
* @param name name of the can device. This is the netdev name, as ifconfig -a shows
* in your system. usually it contains prefix "can" and the numer of the can
* line. e.g. "can0"
* @param bc pointer to the error counter struct..
*
* This one gets the current can_device_stats.
*
* Please see struct can_device_stats for more information.
*
* @return 0 if success
* @return -1 if failed
*/
int can_get_device_stats(const char *name, struct can_device_stats *cds)
{
return get_link(name, GET_XSTATS, cds);
}