kernel/linux.git/tools/lib/bpf/bpf.c, branch v4.18.2

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

libbpf: add bpf_raw_tracepoint_open helper

2018-03-28T20:55:19+00:00

add bpf_raw_tracepoint_open(const char *name, int prog_fd) api to libbpf Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann

libbpf: add missing SPDX-License-Identifier

2018-02-03T01:53:48+00:00

Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov Signed-off-by: Alexei Starovoitov

libbpf: add error reporting in XDP

2018-02-03T01:53:48+00:00

Parse netlink ext attribute to get the error message returned by the card. Code is partially take from libnl. We add netlink.h to the uapi include of tools. And we need to avoid include of userspace netlink header to have a successful build of sample so nlattr.h has a define to avoid the inclusion. Using a direct define could have been an issue as NLMSGERR_ATTR_MAX can change in the future. We also define SOL_NETLINK if not defined to avoid to have to copy socket.h for a fixed value. Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov Signed-off-by: Alexei Starovoitov

libbpf: add function to setup XDP

2018-02-03T01:53:48+00:00

Most of the code is taken from set_link_xdp_fd() in bpf_load.c and slightly modified to be library compliant. Signed-off-by: Eric Leblond Acked-by: Alexei Starovoitov Signed-off-by: Alexei Starovoitov