5.15-stable review patch. If anyone has any objections, please let me know.
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From: Samasth Norway Ananda samasth.norway.ananda@oracle.com
This reverts commit 3eefb2fbf4ec1c1ff239b8b65e6e78aae335e4a6.
libbpf support for "tc" progs doesn't exist for the linux-5.15.y tree. This commit was backported too far back in upstream, to a kernel where the libbpf support was not there for the test.
Signed-off-by: Samasth Norway Ananda samasth.norway.ananda@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/bpf/prog_tests/tailcalls.c | 55 ------------------ tools/testing/selftests/bpf/progs/tailcall_bpf2bpf6.c | 42 ------------- 2 files changed, 97 deletions(-) delete mode 100644 tools/testing/selftests/bpf/progs/tailcall_bpf2bpf6.c
--- a/tools/testing/selftests/bpf/prog_tests/tailcalls.c +++ b/tools/testing/selftests/bpf/prog_tests/tailcalls.c @@ -810,59 +810,6 @@ out: bpf_object__close(obj); }
-#include "tailcall_bpf2bpf6.skel.h" - -/* Tail call counting works even when there is data on stack which is - * not aligned to 8 bytes. - */ -static void test_tailcall_bpf2bpf_6(void) -{ - struct tailcall_bpf2bpf6 *obj; - int err, map_fd, prog_fd, main_fd, data_fd, i, val; - LIBBPF_OPTS(bpf_test_run_opts, topts, - .data_in = &pkt_v4, - .data_size_in = sizeof(pkt_v4), - .repeat = 1, - ); - - obj = tailcall_bpf2bpf6__open_and_load(); - if (!ASSERT_OK_PTR(obj, "open and load")) - return; - - main_fd = bpf_program__fd(obj->progs.entry); - if (!ASSERT_GE(main_fd, 0, "entry prog fd")) - goto out; - - map_fd = bpf_map__fd(obj->maps.jmp_table); - if (!ASSERT_GE(map_fd, 0, "jmp_table map fd")) - goto out; - - prog_fd = bpf_program__fd(obj->progs.classifier_0); - if (!ASSERT_GE(prog_fd, 0, "classifier_0 prog fd")) - goto out; - - i = 0; - err = bpf_map_update_elem(map_fd, &i, &prog_fd, BPF_ANY); - if (!ASSERT_OK(err, "jmp_table map update")) - goto out; - - err = bpf_prog_test_run_opts(main_fd, &topts); - ASSERT_OK(err, "entry prog test run"); - ASSERT_EQ(topts.retval, 0, "tailcall retval"); - - data_fd = bpf_map__fd(obj->maps.bss); - if (!ASSERT_GE(data_fd, 0, "bss map fd")) - goto out; - - i = 0; - err = bpf_map_lookup_elem(data_fd, &i, &val); - ASSERT_OK(err, "bss map lookup"); - ASSERT_EQ(val, 1, "done flag is set"); - -out: - tailcall_bpf2bpf6__destroy(obj); -} - void test_tailcalls(void) { if (test__start_subtest("tailcall_1")) @@ -885,6 +832,4 @@ void test_tailcalls(void) test_tailcall_bpf2bpf_4(false); if (test__start_subtest("tailcall_bpf2bpf_5")) test_tailcall_bpf2bpf_4(true); - if (test__start_subtest("tailcall_bpf2bpf_6")) - test_tailcall_bpf2bpf_6(); } --- a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf6.c +++ /dev/null @@ -1,42 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/bpf.h> -#include <bpf/bpf_helpers.h> - -#define __unused __attribute__((unused)) - -struct { - __uint(type, BPF_MAP_TYPE_PROG_ARRAY); - __uint(max_entries, 1); - __uint(key_size, sizeof(__u32)); - __uint(value_size, sizeof(__u32)); -} jmp_table SEC(".maps"); - -int done = 0; - -SEC("tc") -int classifier_0(struct __sk_buff *skb __unused) -{ - done = 1; - return 0; -} - -static __noinline -int subprog_tail(struct __sk_buff *skb) -{ - /* Don't propagate the constant to the caller */ - volatile int ret = 1; - - bpf_tail_call_static(skb, &jmp_table, 0); - return ret; -} - -SEC("tc") -int entry(struct __sk_buff *skb) -{ - /* Have data on stack which size is not a multiple of 8 */ - volatile char arr[1] = {}; - - return subprog_tail(skb); -} - -char __license[] SEC("license") = "GPL";