From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/shared/bpf-program.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 src/shared/bpf-program.h (limited to 'src/shared/bpf-program.h') diff --git a/src/shared/bpf-program.h b/src/shared/bpf-program.h new file mode 100644 index 0000000..b640fb9 --- /dev/null +++ b/src/shared/bpf-program.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include +#include +#include +#include + +#include "fdset.h" +#include "list.h" +#include "macro.h" + +typedef struct BPFProgram BPFProgram; + +/* This encapsulates three different concepts: the loaded BPF program, the BPF code, and the attachment to a + * cgroup. Typically our BPF programs go through all three stages: we build the code, we load it, and finally + * we attach it, but it might happen that we operate with programs that aren't loaded or aren't attached, or + * where we don't have the code. */ +struct BPFProgram { + /* The loaded BPF program, if loaded */ + int kernel_fd; + uint32_t prog_type; + char *prog_name; + + /* The code of it BPF program, if known */ + size_t n_instructions; + struct bpf_insn *instructions; + + /* The cgroup path the program is attached to, if it is attached. If non-NULL bpf_program_unref() + * will detach on destruction. */ + char *attached_path; + int attached_type; + uint32_t attached_flags; +}; + +int bpf_program_new(uint32_t prog_type, const char *prog_name, BPFProgram **ret); +int bpf_program_new_from_bpffs_path(const char *path, BPFProgram **ret); +BPFProgram *bpf_program_free(BPFProgram *p); + +int bpf_program_add_instructions(BPFProgram *p, const struct bpf_insn *insn, size_t count); +int bpf_program_load_kernel(BPFProgram *p, char *log_buf, size_t log_size); +int bpf_program_load_from_bpf_fs(BPFProgram *p, const char *path); + +int bpf_program_cgroup_attach(BPFProgram *p, int type, const char *path, uint32_t flags); +int bpf_program_cgroup_detach(BPFProgram *p); + +int bpf_program_pin(int prog_fd, const char *bpffs_path); +int bpf_program_get_id_by_fd(int prog_fd, uint32_t *ret_id); + +int bpf_program_serialize_attachment(FILE *f, FDSet *fds, const char *key, BPFProgram *p); +int bpf_program_serialize_attachment_set(FILE *f, FDSet *fds, const char *key, Set *set); +int bpf_program_deserialize_attachment(const char *v, FDSet *fds, BPFProgram **bpfp); +int bpf_program_deserialize_attachment_set(const char *v, FDSet *fds, Set **bpfsetp); + +extern const struct hash_ops bpf_program_hash_ops; + +int bpf_map_new(enum bpf_map_type type, size_t key_size, size_t value_size, size_t max_entries, uint32_t flags); +int bpf_map_update_element(int fd, const void *key, void *value); +int bpf_map_lookup_element(int fd, const void *key, void *value); + +int bpf_cgroup_attach_type_from_string(const char *str) _pure_; +const char *bpf_cgroup_attach_type_to_string(int attach_type) _const_; + +DEFINE_TRIVIAL_CLEANUP_FUNC(BPFProgram*, bpf_program_free); -- cgit v1.2.3