/* * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com> * Copyright (C) 2015, Huawei Inc. */ #ifndef __BPF_LOADER_H #define __BPF_LOADER_H #include <linux/compiler.h> #include <linux/err.h> #include <string.h> #include <bpf/libbpf.h> #include "probe-event.h" #include "evlist.h" #include "debug.h" enum bpf_loader_errno { __BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100, /* Invalid config string */ BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START, BPF_LOADER_ERRNO__GROUP, /* Invalid group name */ BPF_LOADER_ERRNO__EVENTNAME, /* Event name is missing */ BPF_LOADER_ERRNO__INTERNAL, /* BPF loader internal error */ BPF_LOADER_ERRNO__COMPILE, /* Error when compiling BPF scriptlet */ BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */ BPF_LOADER_ERRNO__PROLOGUE, /* Failed to generate prologue */ BPF_LOADER_ERRNO__PROLOGUE2BIG, /* Prologue too big for program */ BPF_LOADER_ERRNO__PROLOGUEOOB, /* Offset out of bound for prologue */ BPF_LOADER_ERRNO__OBJCONF_OPT, /* Invalid object config option */ BPF_LOADER_ERRNO__OBJCONF_CONF, /* Config value not set (lost '=')) */ BPF_LOADER_ERRNO__OBJCONF_MAP_OPT, /* Invalid object map config option */ BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST, /* Target map not exist */ BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE, /* Incorrect value type for map */ BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE, /* Incorrect map type */ BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE, /* Incorrect map key size */ BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE,/* Incorrect map value size */ BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT, /* Event not found for map setting */ BPF_LOADER_ERRNO__OBJCONF_MAP_MAPSIZE, /* Invalid map size for event setting */ BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM, /* Event dimension too large */ BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH, /* Doesn't support inherit event */ BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE, /* Wrong event type for map */ BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG, /* Index too large */ __BPF_LOADER_ERRNO__END, }; struct bpf_object; struct parse_events_term; #define PERF_BPF_PROBE_GROUP "perf_bpf_probe" typedef int (*bpf_prog_iter_callback_t)(const char *group, const char *event, int fd, void *arg); #ifdef HAVE_LIBBPF_SUPPORT struct bpf_object *bpf__prepare_load(const char *filename, bool source); int bpf__strerror_prepare_load(const char *filename, bool source, int err, char *buf, size_t size); struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz, const char *name); void bpf__clear(void); int bpf__probe(struct bpf_object *obj); int bpf__unprobe(struct bpf_object *obj); int bpf__strerror_probe(struct bpf_object *obj, int err, char *buf, size_t size); int bpf__load(struct bpf_object *obj); int bpf__strerror_load(struct bpf_object *obj, int err, char *buf, size_t size); int bpf__foreach_event(struct bpf_object *obj, bpf_prog_iter_callback_t func, void *arg); int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term, struct perf_evlist *evlist, int *error_pos); int bpf__strerror_config_obj(struct bpf_object *obj, struct parse_events_term *term, struct perf_evlist *evlist, int *error_pos, int err, char *buf, size_t size); int bpf__apply_obj_config(void); int bpf__strerror_apply_obj_config(int err, char *buf, size_t size); int bpf__setup_stdout(struct perf_evlist *evlist); int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err, char *buf, size_t size); #else static inline struct bpf_object * bpf__prepare_load(const char *filename __maybe_unused, bool source __maybe_unused) { pr_debug("ERROR: eBPF object loading is disabled during compiling.\n"); return ERR_PTR(-ENOTSUP); } static inline struct bpf_object * bpf__prepare_load_buffer(void *obj_buf __maybe_unused, size_t obj_buf_sz __maybe_unused) { return ERR_PTR(-ENOTSUP); } static inline void bpf__clear(void) { } static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;} static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;} static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; } static inline int bpf__foreach_event(struct bpf_object *obj __maybe_unused, bpf_prog_iter_callback_t func __maybe_unused, void *arg __maybe_unused) { return 0; } static inline int bpf__config_obj(struct bpf_object *obj __maybe_unused, struct parse_events_term *term __maybe_unused, struct perf_evlist *evlist __maybe_unused, int *error_pos __maybe_unused) { return 0; } static inline int bpf__apply_obj_config(void) { return 0; } static inline int bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused) { return 0; } static inline int __bpf_strerror(char *buf, size_t size) { if (!size) return 0; strncpy(buf, "ERROR: eBPF object loading is disabled during compiling.\n", size); buf[size - 1] = '\0'; return 0; } static inline int bpf__strerror_prepare_load(const char *filename __maybe_unused, bool source __maybe_unused, int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } static inline int bpf__strerror_probe(struct bpf_object *obj __maybe_unused, int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused, int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } static inline int bpf__strerror_config_obj(struct bpf_object *obj __maybe_unused, struct parse_events_term *term __maybe_unused, struct perf_evlist *evlist __maybe_unused, int *error_pos __maybe_unused, int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } static inline int bpf__strerror_apply_obj_config(int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } static inline int bpf__strerror_setup_stdout(struct perf_evlist *evlist __maybe_unused, int err __maybe_unused, char *buf, size_t size) { return __bpf_strerror(buf, size); } #endif #endif