linux/tools/testing/selftests/bpf/trace_helpers.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __TRACE_HELPER_H
#define __TRACE_HELPER_H

#include <bpf/libbpf.h>

struct ksym {
	long addr;
	char *name;
};

int load_kallsyms(void);
struct ksym *ksym_search(long key);
long ksym_get_addr(const char *name);

/* open kallsyms and find addresses on the fly, faster than load + search. */
int kallsyms_find(const char *sym, unsigned long long *addr);

void read_trace_pipe(void);

#endif
samples/bpf: move common-purpose trace functions to selftests There is no functionality change in this patch. The common-purpose trace functions, including perf_event polling and ksym lookup, are moved from trace_output_user.c and bpf_load.c to selftests/bpf/trace_helpers.c so that these function can be reused later in selftests. Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> 2018-04-29 13:28:13 +08:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef __TRACE_HELPER_H`
			`#define __TRACE_HELPER_H`

selftests: Use consistent include paths for libbpf Fix all selftests to include libbpf header files with the bpf/ prefix, to be consistent with external users of the library. Also ensure that all includes of exported libbpf header files (those that are exported on 'make install' of the library) use bracketed includes instead of quoted. To not break the build, keep the old include path until everything has been changed to the new one; a subsequent patch will remove that. Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157952560568.1683545.9649335788846513446.stgit@toke.dk 2020-01-20 21:06:45 +08:00			`#include <bpf/libbpf.h>`
tools: bpf: move the event reading loop to libbpf There are two copies of event reading loop - in bpftool and trace_helpers "library". Consolidate them and move the code to libbpf. Return codes from trace_helpers are kept, but renamed to include LIBBPF prefix. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> 2018-05-11 01:24:40 +08:00
samples/bpf: move common-purpose trace functions to selftests There is no functionality change in this patch. The common-purpose trace functions, including perf_event polling and ksym lookup, are moved from trace_output_user.c and bpf_load.c to selftests/bpf/trace_helpers.c so that these function can be reused later in selftests. Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> 2018-04-29 13:28:13 +08:00			`struct ksym {`
			`long addr;`
			`char *name;`
			`};`

			`int load_kallsyms(void);`
			`struct ksym *ksym_search(long key);`
tools/bpf: add ksym_get_addr() in trace_helpers Given a kernel function name, ksym_get_addr() will return the kernel address for this function, or 0 if it cannot find this function name in /proc/kallsyms. This function will be used later when a kernel address is used to initiate a kprobe perf event. Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> 2018-05-25 02:21:11 +08:00			`long ksym_get_addr(const char *name);`
selftests/bpf: Ksyms_btf to test typed ksyms Selftests for typed ksyms. Tests two types of ksyms: one is a struct, the other is a plain int. This tests two paths in the kernel. Struct ksyms will be converted into PTR_TO_BTF_ID by the verifier while int typed ksyms will be converted into PTR_TO_MEM. Signed-off-by: Hao Luo <haoluo@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200929235049.2533242-4-haoluo@google.com 2020-09-30 07:50:46 +08:00
			`/* open kallsyms and find addresses on the fly, faster than load + search. */`
			`int kallsyms_find(const char sym, unsigned long long addr);`

samples, bpf: Move read_trace_pipe to trace_helpers To reduce the reliance of trace samples (trace*_user) on bpf_load, move read_trace_pipe to trace_helpers. By moving this bpf_loader helper elsewhere, trace functions can be easily migrated to libbbpf. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200321100424.1593964-2-danieltimlee@gmail.com 2020-03-21 18:04:23 +08:00			`void read_trace_pipe(void);`
samples/bpf: move common-purpose trace functions to selftests There is no functionality change in this patch. The common-purpose trace functions, including perf_event polling and ksym lookup, are moved from trace_output_user.c and bpf_load.c to selftests/bpf/trace_helpers.c so that these function can be reused later in selftests. Acked-by: Alexei Starovoitov <ast@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> 2018-04-29 13:28:13 +08:00
			`#endif`