forked from Minki/linux
e9ee9efc0d
Often we want to write tests cases that check things like bad context offset accesses. And one way to do this is to use an odd offset on, for example, a 32-bit load. This unfortunately triggers the alignment checks first on platforms that do not set CONFIG_EFFICIENT_UNALIGNED_ACCESS. So the test case see the alignment failure rather than what it was testing for. It is often not completely possible to respect the original intention of the test, or even test the same exact thing, while solving the alignment issue. Another option could have been to check the alignment after the context and other validations are performed by the verifier, but that is a non-trivial change to the verifier. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
145 lines
5.2 KiB
C
145 lines
5.2 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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/*
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* common eBPF ELF operations.
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*
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* Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
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* Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
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* Copyright (C) 2015 Huawei Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses>
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*/
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#ifndef __LIBBPF_BPF_H
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#define __LIBBPF_BPF_H
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#include <linux/bpf.h>
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#include <stdbool.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef LIBBPF_API
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#define LIBBPF_API __attribute__((visibility("default")))
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#endif
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struct bpf_create_map_attr {
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const char *name;
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enum bpf_map_type map_type;
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__u32 map_flags;
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__u32 key_size;
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__u32 value_size;
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__u32 max_entries;
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__u32 numa_node;
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__u32 btf_fd;
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__u32 btf_key_type_id;
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__u32 btf_value_type_id;
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__u32 map_ifindex;
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__u32 inner_map_fd;
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};
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LIBBPF_API int
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bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
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LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
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int key_size, int value_size,
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int max_entries, __u32 map_flags, int node);
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LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name,
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int key_size, int value_size,
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int max_entries, __u32 map_flags);
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LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size,
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int value_size, int max_entries, __u32 map_flags);
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LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type,
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const char *name, int key_size,
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int inner_map_fd, int max_entries,
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__u32 map_flags, int node);
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LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type,
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const char *name, int key_size,
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int inner_map_fd, int max_entries,
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__u32 map_flags);
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struct bpf_load_program_attr {
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enum bpf_prog_type prog_type;
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enum bpf_attach_type expected_attach_type;
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const char *name;
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const struct bpf_insn *insns;
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size_t insns_cnt;
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const char *license;
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__u32 kern_version;
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__u32 prog_ifindex;
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__u32 prog_btf_fd;
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__u32 func_info_rec_size;
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const void *func_info;
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__u32 func_info_cnt;
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};
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/* Flags to direct loading requirements */
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#define MAPS_RELAX_COMPAT 0x01
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/* Recommend log buffer size */
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#define BPF_LOG_BUF_SIZE (256 * 1024)
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LIBBPF_API int
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bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
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char *log_buf, size_t log_buf_sz);
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LIBBPF_API int bpf_load_program(enum bpf_prog_type type,
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const struct bpf_insn *insns, size_t insns_cnt,
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const char *license, __u32 kern_version,
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char *log_buf, size_t log_buf_sz);
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LIBBPF_API int bpf_verify_program(enum bpf_prog_type type,
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const struct bpf_insn *insns,
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size_t insns_cnt, __u32 prog_flags,
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const char *license, __u32 kern_version,
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char *log_buf, size_t log_buf_sz,
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int log_level);
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LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
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__u64 flags);
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LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
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LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
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void *value);
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LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
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LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
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LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
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LIBBPF_API int bpf_obj_get(const char *pathname);
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LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
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enum bpf_attach_type type, unsigned int flags);
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LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
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LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
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enum bpf_attach_type type);
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LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
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__u32 size, void *data_out, __u32 *size_out,
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__u32 *retval, __u32 *duration);
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LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
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LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
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LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
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LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
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LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
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LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
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LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
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__u32 query_flags, __u32 *attach_flags,
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__u32 *prog_ids, __u32 *prog_cnt);
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LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
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LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
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__u32 log_buf_size, bool do_log);
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LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
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__u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
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__u64 *probe_offset, __u64 *probe_addr);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* __LIBBPF_BPF_H */
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