[PATCH 6.6] Revert "selftests/bpf: Implement get_hw_ring_size function to retrieve current and max interface size"

[Pu Lehui <pulehui@xxxxxxxxxxxxxxx>]

From: Pu Lehui <pulehui@xxxxxxxxxx>

This reverts commit c8c590f07ad7ffaa6ef11e90b81202212077497b which is
commit 90a695c3d31e1c9f0adb8c4c80028ed4ea7ed5ab upstream.

Commit c8c590f07ad7 ("selftests/bpf: Implement get_hw_ring_size function
to retrieve current and max interface size") will cause the following
bpf selftests compilation error in the 6.6 stable branch, and it is not
the Stable-dep-of of commit 103c0431c7fb ("selftests/bpf: Drop unneeded
error.h includes"). So let's revert commit c8c590f07ad7 to fix this
compilation error.

  ./network_helpers.h:66:43: error: 'struct ethtool_ringparam' declared
    inside parameter list will not be visible outside of this definition or
    declaration [-Werror]
      66 | int get_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param);

Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/network_helpers.c | 24 -------------------
 tools/testing/selftests/bpf/network_helpers.h |  4 ----
 .../selftests/bpf/prog_tests/flow_dissector.c |  1 +
 tools/testing/selftests/bpf/xdp_hw_metadata.c | 14 +++++++++++
 4 files changed, 15 insertions(+), 28 deletions(-)

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index d2acc8875212..0877b60ec81f 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -465,27 +465,3 @@ int get_socket_local_port(int sock_fd)
 
 	return -1;
 }
-
-int get_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_GRINGPARAM;
-	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 11cbe194769b..5eccc67d1a99 100644
--- a/tools/testing/selftests/bpf/network_helpers.h
+++ b/tools/testing/selftests/bpf/network_helpers.h
@@ -9,11 +9,8 @@ typedef __u16 __sum16;
 #include <linux/if_packet.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
-#include <linux/ethtool.h>
-#include <linux/sockios.h>
 #include <netinet/tcp.h>
 #include <bpf/bpf_endian.h>
-#include <net/if.h>
 
 #define MAGIC_VAL 0x1234
 #define NUM_ITER 100000
@@ -63,7 +60,6 @@ int make_sockaddr(int family, const char *addr_str, __u16 port,
 		  struct sockaddr_storage *addr, socklen_t *len);
 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);
 
 struct nstoken;
 /**
diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
index 3171047414a7..b81046806579 100644
--- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
+++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
@@ -2,6 +2,7 @@
 #define _GNU_SOURCE
 #include <test_progs.h>
 #include <network_helpers.h>
+#include <linux/if.h>
 #include <linux/if_tun.h>
 #include <sys/uio.h>
 
diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c
index 79f2da8f6ead..adb77c1a6a74 100644
--- a/tools/testing/selftests/bpf/xdp_hw_metadata.c
+++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c
@@ -288,6 +288,20 @@ static int verify_metadata(struct xsk *rx_xsk, int rxq, int server_fd, clockid_t
 	return 0;
 }
 
+struct ethtool_channels {
+	__u32	cmd;
+	__u32	max_rx;
+	__u32	max_tx;
+	__u32	max_other;
+	__u32	max_combined;
+	__u32	rx_count;
+	__u32	tx_count;
+	__u32	other_count;
+	__u32	combined_count;
+};
+
+#define ETHTOOL_GCHANNELS	0x0000003c /* Get no of channels */
+
 static int rxq_num(const char *ifname)
 {
 	struct ethtool_channels ch = {
-- 
2.34.1