diff options
Diffstat (limited to 'platform/linux-generic/pktio/ethtool.c')
| -rw-r--r-- | platform/linux-generic/pktio/ethtool.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/platform/linux-generic/pktio/ethtool.c b/platform/linux-generic/pktio/ethtool.c new file mode 100644 index 000000000..1f2943888 --- /dev/null +++ b/platform/linux-generic/pktio/ethtool.c @@ -0,0 +1,164 @@ +/* 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.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; + + snprintf(ifr.ifr_name, IF_NAMESIZE, "%s", name); + + return ethtool_stats(fd, &ifr, stats); +} |