selftests, xsk: Rename AF_XDP testing app

Recently, xsk part of libbpf was moved to selftests/bpf directory and
lives on its own because there is an AF_XDP testing application that
needs it called xdpxceiver. That name makes it a bit hard to indicate
who maintains it as there are other XDP samples in there, whereas this
one is strictly about AF_XDP.

Do s/xdpxceiver/xskxceiver so that it will be easier to figure out who
maintains it. A follow-up patch will correct MAINTAINERS file.

Signed-off-by: Maciej Fijalkowski <[e-mail]>
Signed-off-by: Daniel Borkmann <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/testing/selftests/bpf/.gitignore

···
 /bench
 *.ko
 *.tmp
-xdpxceiver
+xskxceiver
 xdp_redirect_multi
 xdp_synproxy

tools/testing/selftests/bpf/Makefile

···
 TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
 	flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
 	test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
-	xdpxceiver xdp_redirect_multi xdp_synproxy
+	xskxceiver xdp_redirect_multi xdp_synproxy
 
 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
 
···
 $(OUTPUT)/test_maps: $(TESTING_HELPERS)
 $(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS)
 $(OUTPUT)/xsk.o: $(BPFOBJ)
-$(OUTPUT)/xdpxceiver: $(OUTPUT)/xsk.o
+$(OUTPUT)/xskxceiver: $(OUTPUT)/xsk.o
 
 BPFTOOL ?= $(DEFAULT_BPFTOOL)
 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \

tools/testing/selftests/bpf/test_xsk.sh

···
 #       conflict with any existing interface
 #   * tests the veth and xsk layers of the topology
 #
-# See the source xdpxceiver.c for information on each test
+# See the source xskxceiver.c for information on each test
 #
 # Kernel configuration:
 # ---------------------
···
 
 TEST_NAME="XSK_SELFTESTS_SOFTIRQ"
 
-execxdpxceiver
+exec_xskxceiver
 
 cleanup_exit ${VETH0} ${VETH1} ${NS1}
 TEST_NAME="XSK_SELFTESTS_BUSY_POLL"
 busy_poll=1
 
 setup_vethPairs
-execxdpxceiver
+exec_xskxceiver
 
 ## END TESTS
 

tools/testing/selftests/bpf/xdpxceiver.c tools/testing/selftests/bpf/xskxceiver.c

···
 #include <unistd.h>
 #include <stdatomic.h>
 #include "xsk.h"
-#include "xdpxceiver.h"
+#include "xskxceiver.h"
 #include "../kselftest.h"
 
 /* AF_XDP APIs were moved into libxdp and marked as deprecated in libbpf.
- * Until xdpxceiver is either moved or re-writed into libxdp, suppress
+ * Until xskxceiver is either moved or re-writed into libxdp, suppress
  * deprecation warnings in this file
  */
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"

tools/testing/selftests/bpf/xdpxceiver.h tools/testing/selftests/bpf/xskxceiver.h

···
  * Copyright(c) 2020 Intel Corporation.
  */
 
-#ifndef XDPXCEIVER_H_
-#define XDPXCEIVER_H_
+#ifndef XSKXCEIVER_H_
+#define XSKXCEIVER_H_
 
 #ifndef SOL_XDP
 #define SOL_XDP 283
···
 
 int pkts_in_flight;
 
-#endif				/* XDPXCEIVER_H */
+#endif				/* XSKXCEIVER_H_ */

tools/testing/selftests/bpf/xsk_prereqs.sh

···
 ksft_xpass=3
 ksft_skip=4
 
-XSKOBJ=xdpxceiver
+XSKOBJ=xskxceiver
 
 validate_root_exec()
 {
···
 	[ ! $(type -P ip) ] && { echo "'ip' not found. Skipping tests."; test_exit $ksft_skip; }
 }
 
-execxdpxceiver()
+exec_xskxceiver()
 {
         if [[ $busy_poll -eq 1 ]]; then
 	        ARGS+="-b "