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bf0f0fd939
Use existing pkt_v4 and pkt_v6 to make sure flow_keys are what we want. Also, add new bpf_flow_load routine (and flow_dissector_load.h header) that loads bpf_flow.o program and does all required setup. Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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#ifndef FLOW_DISSECTOR_LOAD
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#define FLOW_DISSECTOR_LOAD
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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static inline int bpf_flow_load(struct bpf_object **obj,
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const char *path,
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const char *section_name,
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const char *map_name,
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int *prog_fd)
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{
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struct bpf_program *prog, *main_prog;
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struct bpf_map *prog_array;
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int prog_array_fd;
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int ret, fd, i;
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ret = bpf_prog_load(path, BPF_PROG_TYPE_FLOW_DISSECTOR, obj,
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prog_fd);
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if (ret)
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return ret;
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main_prog = bpf_object__find_program_by_title(*obj, section_name);
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if (!main_prog)
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return ret;
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*prog_fd = bpf_program__fd(main_prog);
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if (*prog_fd < 0)
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return ret;
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prog_array = bpf_object__find_map_by_name(*obj, map_name);
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if (!prog_array)
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return ret;
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prog_array_fd = bpf_map__fd(prog_array);
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if (prog_array_fd < 0)
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return ret;
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i = 0;
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bpf_object__for_each_program(prog, *obj) {
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fd = bpf_program__fd(prog);
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if (fd < 0)
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return fd;
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if (fd != *prog_fd) {
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bpf_map_update_elem(prog_array_fd, &i, &fd, BPF_ANY);
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++i;
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}
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}
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return 0;
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}
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#endif /* FLOW_DISSECTOR_LOAD */
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