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/* Copyright (c) 2015-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odp_api.h>
#include <odp_sysfs_stats.h>
#include <odp_errno_define.h>
#include <errno.h>
#include <string.h>
#include <inttypes.h>
static int sysfs_get_val(const char *fname, uint64_t *val)
{
FILE *file;
char str[128];
int ret = -1;
file = fopen(fname, "rt");
if (file == NULL) {
_odp_errno = errno;
/* do not print debug err if sysfs is not supported by
* kernel driver.
*/
if (errno != ENOENT)
ODP_ERR("fopen %s: %s\n", fname, strerror(errno));
return 0;
}
if (fgets(str, sizeof(str), file) != NULL)
ret = sscanf(str, "%" SCNx64, val);
(void)fclose(file);
if (ret != 1) {
ODP_ERR("read %s\n", fname);
return -1;
}
return 0;
}
int _odp_sysfs_stats(pktio_entry_t *pktio_entry,
odp_pktio_stats_t *stats)
{
char fname[256];
const char *dev = pktio_entry->s.name;
int ret = 0;
sprintf(fname, "/sys/class/net/%s/statistics/rx_bytes", dev);
ret -= sysfs_get_val(fname, &stats->in_octets);
sprintf(fname, "/sys/class/net/%s/statistics/rx_packets", dev);
ret -= sysfs_get_val(fname, &stats->in_ucast_pkts);
sprintf(fname, "/sys/class/net/%s/statistics/rx_droppped", dev);
ret -= sysfs_get_val(fname, &stats->in_discards);
sprintf(fname, "/sys/class/net/%s/statistics/rx_errors", dev);
ret -= sysfs_get_val(fname, &stats->in_errors);
/* stats->in_unknown_protos is not supported in sysfs */
sprintf(fname, "/sys/class/net/%s/statistics/tx_bytes", dev);
ret -= sysfs_get_val(fname, &stats->out_octets);
sprintf(fname, "/sys/class/net/%s/statistics/tx_packets", dev);
ret -= sysfs_get_val(fname, &stats->out_ucast_pkts);
sprintf(fname, "/sys/class/net/%s/statistics/tx_dropped", dev);
ret -= sysfs_get_val(fname, &stats->out_discards);
sprintf(fname, "/sys/class/net/%s/statistics/tx_errors", dev);
ret -= sysfs_get_val(fname, &stats->out_errors);
return ret;
}
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