linux.git/tools/lib/bpf/bpf.c, branch v4.20

selftests/bpf: add test cases for queue and stack maps

2018-10-19T20:24:31+00:00

test_maps:
Tests that queue/stack maps are behaving correctly even in corner cases

test_progs:
Tests new ebpf helpers

Signed-off-by: Mauricio Vasquez B 
Acked-by: Song Liu 
Signed-off-by: Alexei Starovoitov

libbpf: relicense libbpf as LGPL-2.1 OR BSD-2-Clause

2018-10-08T08:09:48+00:00

libbpf is maturing as a library and gaining features that no other bpf libraries support
(BPF Type Format, bpf to bpf calls, etc)
Many Apache2 licensed projects (like bcc, bpftrace, gobpf, cilium, etc)
would like to use libbpf, but cannot do this yet, since Apache Foundation explicitly
states that LGPL is incompatible with Apache2.
Hence let's relicense libbpf as dual license LGPL-2.1 or BSD-2-Clause,
since BSD-2 is compatible with Apache2.
Dual LGPL or Apache2 is invalid combination.
Fix license mistake in Makefile as well.

Signed-off-by: Alexei Starovoitov 
Acked-by: Andrey Ignatov 
Acked-by: Arnaldo Carvalho de Melo 
Acked-by: Björn Töpel 
Acked-by: Daniel Borkmann 
Acked-by: David Beckett 
Acked-by: Jakub Kicinski 
Acked-by: Joe Stringer 
Acked-by: John Fastabend 
Acked-by: Martin KaFai Lau 
Acked-by: Quentin Monnet 
Acked-by: Thomas Graf 
Acked-by: Roman Gushchin 
Acked-by: Wang Nan 
Acked-by: Yonghong Song 
Signed-off-by: Daniel Borkmann

tools/bpf: move bpf/lib netlink related functions into a new file

2018-09-07T05:34:08+00:00

There are no functionality change for this patch.

In the subsequent patches, more netlink related library functions
will be added and a separate file is better than cluttering bpf.c.

Signed-off-by: Yonghong Song 
Signed-off-by: Alexei Starovoitov

bpf: Test BPF_PROG_TYPE_SK_REUSEPORT

2018-08-10T23:58:46+00:00

This patch add tests for the new BPF_PROG_TYPE_SK_REUSEPORT.

The tests cover:
- IPv4/IPv6 + TCP/UDP
- TCP syncookie
- TCP fastopen
- Cases when the bpf_sk_select_reuseport() returning errors
- Cases when the bpf prog returns SK_DROP
- Values from sk_reuseport_md
- outer_map => reuseport_array

The test depends on
commit 3eee1f75f2b9 ("bpf: fix bpf_skb_load_bytes_relative pkt length check")

Signed-off-by: Martin KaFai Lau 
Acked-by: Alexei Starovoitov 
Signed-off-by: Daniel Borkmann

tools/bpf: sync kernel header bpf.h and add bpf_task_fd_query in libbpf

2018-05-25T01:18:19+00:00

Sync kernel header bpf.h to tools/include/uapi/linux/bpf.h and
implement bpf_task_fd_query() in libbpf. The test programs
in samples/bpf and tools/testing/selftests/bpf, and later bpftool
will use this libbpf function to query kernel.

Acked-by: Martin KaFai Lau 
Signed-off-by: Yonghong Song 
Signed-off-by: Alexei Starovoitov

bpf: btf: Add tests for the btf uapi changes

2018-05-23T10:03:32+00:00

This patch does the followings:
1. Modify libbpf and test_btf to reflect the uapi changes in btf
2. Add test for the btf_header changes
3. Add tests for array->index_type
4. Add err_str check to the tests
5. Fix a 4 bytes hole in "struct test #1" by swapping "m" and "n"

Signed-off-by: Martin KaFai Lau 
Signed-off-by: Daniel Borkmann

libbpf: add ifindex to enable offload support

2018-05-16T22:54:26+00:00

BPF programs currently can only be offloaded using iproute2. This
patch will allow programs to be offloaded using libbpf calls.

Signed-off-by: David Beckett 
Reviewed-by: Jakub Kicinski 
Signed-off-by: Daniel Borkmann

bpf: btf: Tests for BPF_OBJ_GET_INFO_BY_FD and BPF_BTF_GET_FD_BY_ID

2018-05-09T15:25:14+00:00

This patch adds test for BPF_BTF_GET_FD_BY_ID and the new
btf_id/btf_key_id/btf_value_id in the "struct bpf_map_info".

It also modifies the existing BPF_OBJ_GET_INFO_BY_FD test
to reflect the new "struct bpf_btf_info".

Signed-off-by: Martin KaFai Lau 
Acked-by: Alexei Starovoitov 
Acked-by: Song Liu 
Signed-off-by: Daniel Borkmann

bpf: btf: Add BTF support to libbpf

2018-04-19T19:46:25+00:00

If the ".BTF" elf section exists, libbpf will try to create
a btf_fd (through BPF_BTF_LOAD).  If that fails, it will still
continue loading the bpf prog/map without the BTF.

If the bpf_object has a BTF loaded, it will create a map with the btf_fd.
libbpf will try to figure out the btf_key_id and btf_value_id of a map by
finding the BTF type with name "_key" and "_value".
If they cannot be found, it will continue without using the BTF.

Signed-off-by: Martin KaFai Lau 
Acked-by: Alexei Starovoitov 
Signed-off-by: Daniel Borkmann

libbpf: Support expected_attach_type at prog load

2018-03-31T00:15:05+00:00

Support setting `expected_attach_type` at prog load time in both
`bpf/bpf.h` and `bpf/libbpf.h`.

Since both headers already have API to load programs, new functions are
added not to break backward compatibility for existing ones:
* `bpf_load_program_xattr()` is added to `bpf/bpf.h`;
* `bpf_prog_load_xattr()` is added to `bpf/libbpf.h`.

Both new functions accept structures, `struct bpf_load_program_attr` and
`struct bpf_prog_load_attr` correspondingly, where new fields can be
added in the future w/o changing the API.

Standard `_xattr` suffix is used to name the new API functions.

Since `bpf_load_program_name()` is not used as heavily as
`bpf_load_program()`, it was removed in favor of more generic
`bpf_load_program_xattr()`.

Signed-off-by: Andrey Ignatov 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Daniel Borkmann