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11677aa44c
Recent libcap versions (>= 2.60) cause problems with BPF kselftests, so
backport an upstream patch that replaces libcap and drops the dependency.
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
(cherry picked from commit 04981c716a)
123 lines
3.8 KiB
Diff
123 lines
3.8 KiB
Diff
From 1ac00fea13c576e2b13dabf9a72ad3034e3bb804 Mon Sep 17 00:00:00 2001
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From: Martin KaFai Lau <kafai@fb.com>
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Date: Wed, 16 Mar 2022 10:38:35 -0700
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Subject: [PATCH 3/3] bpf: selftests: Remove libcap usage from test_progs
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This patch removes the libcap usage from test_progs.
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bind_perm.c is the only user. cap_*_effective() helpers added in the
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earlier patch are directly used instead.
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No other selftest binary is using libcap, so '-lcap' is also removed
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from the Makefile.
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Signed-off-by: Martin KaFai Lau <kafai@fb.com>
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Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Reviewed-by: Stanislav Fomichev <sdf@google.com>
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Acked-by: John Fastabend <john.fastabend@gmail.com>
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Link: https://lore.kernel.org/bpf/20220316173835.2039334-1-kafai@fb.com
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---
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tools/testing/selftests/bpf/Makefile | 5 ++-
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.../selftests/bpf/prog_tests/bind_perm.c | 44 ++++---------------
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2 files changed, 11 insertions(+), 38 deletions(-)
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--- a/tools/testing/selftests/bpf/Makefile
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+++ b/tools/testing/selftests/bpf/Makefile
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@@ -26,7 +26,7 @@ CFLAGS += -g -O0 -rdynamic -Wall $(GENFL
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-I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT) \
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-Dbpf_prog_load=bpf_prog_test_load \
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-Dbpf_load_program=bpf_test_load_program
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-LDLIBS += -lcap -lelf -lz -lrt -lpthread
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+LDLIBS += -lelf -lz -lrt -lpthread
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# Silence some warnings when compiled with clang
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ifneq ($(LLVM),)
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@@ -471,7 +471,8 @@ TRUNNER_TESTS_DIR := prog_tests
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TRUNNER_BPF_PROGS_DIR := progs
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TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c \
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network_helpers.c testing_helpers.c \
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- btf_helpers.c flow_dissector_load.h
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+ btf_helpers.c flow_dissector_load.h \
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+ cap_helpers.c
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TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
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ima_setup.sh \
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$(wildcard progs/btf_dump_test_case_*.c)
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--- a/tools/testing/selftests/bpf/prog_tests/bind_perm.c
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+++ b/tools/testing/selftests/bpf/prog_tests/bind_perm.c
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@@ -4,9 +4,9 @@
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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-#include <sys/capability.h>
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#include "test_progs.h"
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+#include "cap_helpers.h"
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#include "bind_perm.skel.h"
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static int duration;
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@@ -49,41 +49,11 @@ close_socket:
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close(fd);
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}
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-bool cap_net_bind_service(cap_flag_value_t flag)
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-{
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- const cap_value_t cap_net_bind_service = CAP_NET_BIND_SERVICE;
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- cap_flag_value_t original_value;
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- bool was_effective = false;
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- cap_t caps;
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-
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- caps = cap_get_proc();
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- if (CHECK(!caps, "cap_get_proc", "errno %d", errno))
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- goto free_caps;
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-
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- if (CHECK(cap_get_flag(caps, CAP_NET_BIND_SERVICE, CAP_EFFECTIVE,
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- &original_value),
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- "cap_get_flag", "errno %d", errno))
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- goto free_caps;
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-
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- was_effective = (original_value == CAP_SET);
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-
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- if (CHECK(cap_set_flag(caps, CAP_EFFECTIVE, 1, &cap_net_bind_service,
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- flag),
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- "cap_set_flag", "errno %d", errno))
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- goto free_caps;
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-
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- if (CHECK(cap_set_proc(caps), "cap_set_proc", "errno %d", errno))
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- goto free_caps;
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-
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-free_caps:
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- CHECK(cap_free(caps), "cap_free", "errno %d", errno);
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- return was_effective;
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-}
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-
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void test_bind_perm(void)
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{
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- bool cap_was_effective;
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+ const __u64 net_bind_svc_cap = 1ULL << CAP_NET_BIND_SERVICE;
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struct bind_perm *skel;
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+ __u64 old_caps = 0;
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int cgroup_fd;
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if (create_netns())
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@@ -105,7 +75,8 @@ void test_bind_perm(void)
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if (!ASSERT_OK_PTR(skel, "bind_v6_prog"))
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goto close_skeleton;
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- cap_was_effective = cap_net_bind_service(CAP_CLEAR);
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+ ASSERT_OK(cap_disable_effective(net_bind_svc_cap, &old_caps),
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+ "cap_disable_effective");
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try_bind(AF_INET, 110, EACCES);
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try_bind(AF_INET6, 110, EACCES);
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@@ -113,8 +84,9 @@ void test_bind_perm(void)
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try_bind(AF_INET, 111, 0);
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try_bind(AF_INET6, 111, 0);
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- if (cap_was_effective)
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- cap_net_bind_service(CAP_SET);
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+ if (old_caps & net_bind_svc_cap)
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+ ASSERT_OK(cap_enable_effective(net_bind_svc_cap, NULL),
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+ "cap_enable_effective");
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close_skeleton:
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bind_perm__destroy(skel);
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