From bee3a7b07624223526c1fea465557068546d3b3c Mon Sep 17 00:00:00 2001 From: Tushar Vyavahare Date: Tue, 2 Apr 2024 11:45:26 +0000 Subject: [PATCH] selftests/bpf: Implement set_hw_ring_size function to configure interface ring size Introduce a new function called set_hw_ring_size that allows for the dynamic configuration of the ring size within the interface. Signed-off-by: Tushar Vyavahare Signed-off-by: Daniel Borkmann Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20240402114529.545475-5-tushar.vyavahare@intel.com --- tools/testing/selftests/bpf/network_helpers.c | 24 +++++++++++++++++++ tools/testing/selftests/bpf/network_helpers.h | 1 + 2 files changed, 25 insertions(+) diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index 1cab20020f94a..04175e16195a8 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -521,3 +521,27 @@ int get_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param) close(sockfd); return 0; } + +int set_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param) +{ + struct ifreq ifr = {0}; + int sockfd, err; + + sockfd = socket(AF_INET, SOCK_DGRAM, 0); + if (sockfd < 0) + return -errno; + + memcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + ring_param->cmd = ETHTOOL_SRINGPARAM; + ifr.ifr_data = (char *)ring_param; + + if (ioctl(sockfd, SIOCETHTOOL, &ifr) < 0) { + err = errno; + close(sockfd); + return -err; + } + + close(sockfd); + return 0; +} diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h index de4d27d201cb8..6457445cc6e24 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -65,6 +65,7 @@ int make_sockaddr(int family, const char *addr_str, __u16 port, char *ping_command(int family); int get_socket_local_port(int sock_fd); int get_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param); +int set_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param); struct nstoken; /** -- 2.30.2