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45825d8ab8
bpf_object__get_kversion() can be used to fetch value of object's 'version' section. Following patch will use it for error reporting. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446817783-86722-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
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* Common eBPF ELF object loading 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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#ifndef __BPF_LIBBPF_H
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#define __BPF_LIBBPF_H
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#include <stdio.h>
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#include <stdbool.h>
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#include <linux/err.h>
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enum libbpf_errno {
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__LIBBPF_ERRNO__START = 4000,
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/* Something wrong in libelf */
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LIBBPF_ERRNO__LIBELF = __LIBBPF_ERRNO__START,
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LIBBPF_ERRNO__FORMAT, /* BPF object format invalid */
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LIBBPF_ERRNO__KVERSION, /* Incorrect or no 'version' section */
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LIBBPF_ERRNO__ENDIAN, /* Endian missmatch */
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LIBBPF_ERRNO__INTERNAL, /* Internal error in libbpf */
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LIBBPF_ERRNO__RELOC, /* Relocation failed */
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LIBBPF_ERRNO__LOAD, /* Load program failure for unknown reason */
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LIBBPF_ERRNO__VERIFY, /* Kernel verifier blocks program loading */
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LIBBPF_ERRNO__PROG2BIG, /* Program too big */
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LIBBPF_ERRNO__KVER, /* Incorrect kernel version */
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__LIBBPF_ERRNO__END,
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};
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int libbpf_strerror(int err, char *buf, size_t size);
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/*
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* In include/linux/compiler-gcc.h, __printf is defined. However
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* it should be better if libbpf.h doesn't depend on Linux header file.
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* So instead of __printf, here we use gcc attribute directly.
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*/
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typedef int (*libbpf_print_fn_t)(const char *, ...)
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__attribute__((format(printf, 1, 2)));
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void libbpf_set_print(libbpf_print_fn_t warn,
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libbpf_print_fn_t info,
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libbpf_print_fn_t debug);
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/* Hide internal to user */
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struct bpf_object;
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struct bpf_object *bpf_object__open(const char *path);
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struct bpf_object *bpf_object__open_buffer(void *obj_buf,
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size_t obj_buf_sz,
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const char *name);
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void bpf_object__close(struct bpf_object *object);
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/* Load/unload object into/from kernel */
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int bpf_object__load(struct bpf_object *obj);
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int bpf_object__unload(struct bpf_object *obj);
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const char *bpf_object__get_name(struct bpf_object *obj);
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unsigned int bpf_object__get_kversion(struct bpf_object *obj);
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struct bpf_object *bpf_object__next(struct bpf_object *prev);
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#define bpf_object__for_each_safe(pos, tmp) \
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for ((pos) = bpf_object__next(NULL), \
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(tmp) = bpf_object__next(pos); \
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(pos) != NULL; \
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(pos) = (tmp), (tmp) = bpf_object__next(tmp))
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/* Accessors of bpf_program. */
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struct bpf_program;
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struct bpf_program *bpf_program__next(struct bpf_program *prog,
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struct bpf_object *obj);
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#define bpf_object__for_each_program(pos, obj) \
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for ((pos) = bpf_program__next(NULL, (obj)); \
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(pos) != NULL; \
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(pos) = bpf_program__next((pos), (obj)))
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typedef void (*bpf_program_clear_priv_t)(struct bpf_program *,
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void *);
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int bpf_program__set_private(struct bpf_program *prog, void *priv,
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bpf_program_clear_priv_t clear_priv);
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int bpf_program__get_private(struct bpf_program *prog,
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void **ppriv);
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const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);
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int bpf_program__fd(struct bpf_program *prog);
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/*
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* We don't need __attribute__((packed)) now since it is
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* unnecessary for 'bpf_map_def' because they are all aligned.
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* In addition, using it will trigger -Wpacked warning message,
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* and will be treated as an error due to -Werror.
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*/
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struct bpf_map_def {
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unsigned int type;
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unsigned int key_size;
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unsigned int value_size;
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unsigned int max_entries;
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};
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#endif
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