215 lines
6.6 KiB
C
215 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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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_LOADER_H
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#define __BPF_LOADER_H
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#include <linux/compiler.h>
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#include <linux/err.h>
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#include <string.h>
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#include <bpf/libbpf.h>
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#include "probe-event.h"
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#include "evlist.h"
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#include "debug.h"
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enum bpf_loader_errno {
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__BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100,
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/* Invalid config string */
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BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START,
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BPF_LOADER_ERRNO__GROUP, /* Invalid group name */
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BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */
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BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */
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BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */
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BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */
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BPF_LOADER_ERRNO__PROLOGUE, /* Failed to generate prologue */
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BPF_LOADER_ERRNO__PROLOGUE2BIG, /* Prologue too big for program */
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BPF_LOADER_ERRNO__PROLOGUEOOB, /* Offset out of bound for prologue */
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BPF_LOADER_ERRNO__OBJCONF_OPT, /* Invalid object config option */
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BPF_LOADER_ERRNO__OBJCONF_CONF, /* Config value not set (lost '=')) */
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BPF_LOADER_ERRNO__OBJCONF_MAP_OPT, /* Invalid object map config option */
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BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST, /* Target map not exist */
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BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE, /* Incorrect value type for map */
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BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE, /* Incorrect map type */
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BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE, /* Incorrect map key size */
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BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE,/* Incorrect map value size */
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BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT, /* Event not found for map setting */
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BPF_LOADER_ERRNO__OBJCONF_MAP_MAPSIZE, /* Invalid map size for event setting */
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BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM, /* Event dimension too large */
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BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH, /* Doesn't support inherit event */
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BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE, /* Wrong event type for map */
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BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG, /* Index too large */
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__BPF_LOADER_ERRNO__END,
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};
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struct perf_evsel;
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struct bpf_object;
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struct parse_events_term;
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#define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
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typedef int (*bpf_prog_iter_callback_t)(const char *group, const char *event,
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int fd, void *arg);
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#ifdef HAVE_LIBBPF_SUPPORT
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struct bpf_object *bpf__prepare_load(const char *filename, bool source);
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int bpf__strerror_prepare_load(const char *filename, bool source,
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int err, char *buf, size_t size);
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struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz,
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const char *name);
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void bpf__clear(void);
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int bpf__probe(struct bpf_object *obj);
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int bpf__unprobe(struct bpf_object *obj);
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int bpf__strerror_probe(struct bpf_object *obj, int err,
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char *buf, size_t size);
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int bpf__load(struct bpf_object *obj);
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int bpf__strerror_load(struct bpf_object *obj, int err,
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char *buf, size_t size);
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int bpf__foreach_event(struct bpf_object *obj,
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bpf_prog_iter_callback_t func, void *arg);
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int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term,
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struct perf_evlist *evlist, int *error_pos);
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int bpf__strerror_config_obj(struct bpf_object *obj,
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struct parse_events_term *term,
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struct perf_evlist *evlist,
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int *error_pos, int err, char *buf,
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size_t size);
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int bpf__apply_obj_config(void);
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int bpf__strerror_apply_obj_config(int err, char *buf, size_t size);
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int bpf__setup_stdout(struct perf_evlist *evlist);
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struct perf_evsel *bpf__setup_output_event(struct perf_evlist *evlist, const char *name);
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int bpf__strerror_setup_output_event(struct perf_evlist *evlist, int err, char *buf, size_t size);
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#else
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#include <errno.h>
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static inline struct bpf_object *
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bpf__prepare_load(const char *filename __maybe_unused,
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bool source __maybe_unused)
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{
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pr_debug("ERROR: eBPF object loading is disabled during compiling.\n");
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return ERR_PTR(-ENOTSUP);
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}
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static inline struct bpf_object *
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bpf__prepare_load_buffer(void *obj_buf __maybe_unused,
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size_t obj_buf_sz __maybe_unused)
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{
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return ERR_PTR(-ENOTSUP);
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}
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static inline void bpf__clear(void) { }
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static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;}
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static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;}
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static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; }
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static inline int
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bpf__foreach_event(struct bpf_object *obj __maybe_unused,
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bpf_prog_iter_callback_t func __maybe_unused,
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void *arg __maybe_unused)
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{
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return 0;
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}
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static inline int
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bpf__config_obj(struct bpf_object *obj __maybe_unused,
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struct parse_events_term *term __maybe_unused,
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struct perf_evlist *evlist __maybe_unused,
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int *error_pos __maybe_unused)
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{
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return 0;
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}
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static inline int
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bpf__apply_obj_config(void)
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{
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return 0;
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}
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static inline int
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bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
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{
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return 0;
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}
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static inline struct perf_evsel *
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bpf__setup_output_event(struct perf_evlist *evlist __maybe_unused, const char *name __maybe_unused)
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{
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return NULL;
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}
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static inline int
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__bpf_strerror(char *buf, size_t size)
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{
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if (!size)
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return 0;
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strncpy(buf,
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"ERROR: eBPF object loading is disabled during compiling.\n",
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size);
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buf[size - 1] = '\0';
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return 0;
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}
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static inline
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int bpf__strerror_prepare_load(const char *filename __maybe_unused,
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bool source __maybe_unused,
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int err __maybe_unused,
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char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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static inline int
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bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
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int err __maybe_unused,
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char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused,
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int err __maybe_unused,
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char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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static inline int
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bpf__strerror_config_obj(struct bpf_object *obj __maybe_unused,
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struct parse_events_term *term __maybe_unused,
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struct perf_evlist *evlist __maybe_unused,
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int *error_pos __maybe_unused,
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int err __maybe_unused,
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char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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static inline int
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bpf__strerror_apply_obj_config(int err __maybe_unused,
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char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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static inline int
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bpf__strerror_setup_output_event(struct perf_evlist *evlist __maybe_unused,
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int err __maybe_unused, char *buf, size_t size)
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{
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return __bpf_strerror(buf, size);
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}
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#endif
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static inline int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err, char *buf, size_t size)
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{
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return bpf__strerror_setup_output_event(evlist, err, buf, size);
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}
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#endif
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