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/* Copyright (c) 2015, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <linux/sockios.h>
#include <linux/if.h>
#include <linux/ethtool.h>
#include <errno.h>
#include <net/if.h>
#include <odp_api.h>
#include <odp_packet_socket.h>
#include <odp_debug_internal.h>
static struct ethtool_gstrings *get_stringset(int fd, struct ifreq *ifr)
{
struct {
struct ethtool_sset_info hdr;
uint32_t buf[1];
} sset_info;
struct ethtool_drvinfo drvinfo;
uint32_t len;
struct ethtool_gstrings *strings;
ptrdiff_t drvinfo_offset = offsetof(struct ethtool_drvinfo, n_stats);
sset_info.hdr.cmd = ETHTOOL_GSSET_INFO;
sset_info.hdr.reserved = 0;
sset_info.hdr.sset_mask = 1ULL << ETH_SS_STATS;
ifr->ifr_data = &sset_info;
if (ioctl(fd, SIOCETHTOOL, ifr) == 0) {
len = sset_info.hdr.sset_mask ? sset_info.hdr.data[0] : 0;
} else if (errno == EOPNOTSUPP && drvinfo_offset != 0) {
/* Fallback for old kernel versions */
drvinfo.cmd = ETHTOOL_GDRVINFO;
ifr->ifr_data = &drvinfo;
if (ioctl(fd, SIOCETHTOOL, ifr)) {
__odp_errno = errno;
ODP_ERR("Cannot get stats information\n");
return NULL;
}
len = *(uint32_t *)(void *)((char *)&drvinfo + drvinfo_offset);
} else {
__odp_errno = errno;
return NULL;
}
if (!len) {
ODP_ERR("len is zero");
return NULL;
}
strings = calloc(1, sizeof(*strings) + len * ETH_GSTRING_LEN);
if (!strings) {
ODP_ERR("alloc failed\n");
return NULL;
}
strings->cmd = ETHTOOL_GSTRINGS;
strings->string_set = ETH_SS_STATS;
strings->len = len;
ifr->ifr_data = strings;
if (ioctl(fd, SIOCETHTOOL, ifr)) {
__odp_errno = errno;
ODP_ERR("Cannot get stats information\n");
free(strings);
return NULL;
}
return strings;
}
static int ethtool_stats(int fd, struct ifreq *ifr, odp_pktio_stats_t *stats)
{
struct ethtool_gstrings *strings;
struct ethtool_stats *estats;
unsigned int n_stats, i;
int err;
int cnts;
strings = get_stringset(fd, ifr);
if (!strings)
return -1;
n_stats = strings->len;
if (n_stats < 1) {
ODP_ERR("no stats available\n");
free(strings);
return -1;
}
estats = calloc(1, n_stats * sizeof(uint64_t) +
sizeof(struct ethtool_stats));
if (!estats) {
free(strings);
return -1;
}
estats->cmd = ETHTOOL_GSTATS;
estats->n_stats = n_stats;
ifr->ifr_data = estats;
err = ioctl(fd, SIOCETHTOOL, ifr);
if (err < 0) {
__odp_errno = errno;
free(strings);
free(estats);
return -1;
}
cnts = 0;
for (i = 0; i < n_stats; i++) {
char *cnt = (char *)&strings->data[i * ETH_GSTRING_LEN];
uint64_t val = estats->data[i];
if (!strcmp(cnt, "rx_octets")) {
stats->in_octets = val;
cnts++;
} else if (!strcmp(cnt, "rx_ucast_packets")) {
stats->in_ucast_pkts = val;
cnts++;
} else if (!strcmp(cnt, "rx_discards")) {
stats->in_discards = val;
cnts++;
} else if (!strcmp(cnt, "rx_errors")) {
stats->in_errors = val;
cnts++;
} else if (!strcmp(cnt, "tx_octets")) {
stats->out_octets = val;
cnts++;
} else if (!strcmp(cnt, "tx_ucast_packets")) {
stats->out_ucast_pkts = val;
cnts++;
} else if (!strcmp(cnt, "tx_discards")) {
stats->out_discards = val;
cnts++;
} else if (!strcmp(cnt, "tx_errors")) {
stats->out_errors = val;
cnts++;
}
}
free(strings);
free(estats);
/* Ethtool strings came from kernel driver. Name of that
* strings is not universal. Current function needs to be updated
* if your driver has different names for counters */
if (cnts < 8)
return -1;
return 0;
}
int ethtool_stats_get_fd(int fd, const char *name, odp_pktio_stats_t *stats)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, IF_NAMESIZE, "%s", name);
return ethtool_stats(fd, &ifr, stats);
}
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