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OpenCloudOS-Kernel/include/trace/events/bpf.h

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bpf: add initial bpf tracepoints This work adds a number of tracepoints to paths that are either considered slow-path or exception-like states, where monitoring or inspecting them would be desirable. For bpf(2) syscall, tracepoints have been placed for main commands when they succeed. In XDP case, tracepoint is for exceptions, that is, f.e. on abnormal BPF program exit such as unknown or XDP_ABORTED return code, or when error occurs during XDP_TX action and the packet could not be forwarded. Both have been split into separate event headers, and can be further extended. Worst case, if they unexpectedly should get into our way in future, they can also removed [1]. Of course, these tracepoints (like any other) can be analyzed by eBPF itself, etc. Example output: # ./perf record -a -e bpf:* sleep 10 # ./perf script sock_example 6197 [005] 283.980322: bpf:bpf_map_create: map type=ARRAY ufd=4 key=4 val=8 max=256 flags=0 sock_example 6197 [005] 283.980721: bpf:bpf_prog_load: prog=a5ea8fa30ea6849c type=SOCKET_FILTER ufd=5 sock_example 6197 [005] 283.988423: bpf:bpf_prog_get_type: prog=a5ea8fa30ea6849c type=SOCKET_FILTER sock_example 6197 [005] 283.988443: bpf:bpf_map_lookup_elem: map type=ARRAY ufd=4 key=[06 00 00 00] val=[00 00 00 00 00 00 00 00] [...] sock_example 6197 [005] 288.990868: bpf:bpf_map_lookup_elem: map type=ARRAY ufd=4 key=[01 00 00 00] val=[14 00 00 00 00 00 00 00] swapper 0 [005] 289.338243: bpf:bpf_prog_put_rcu: prog=a5ea8fa30ea6849c type=SOCKET_FILTER [1] https://lwn.net/Articles/705270/ Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 09:28:18 +08:00
#undef TRACE_SYSTEM
#define TRACE_SYSTEM bpf
#if !defined(_TRACE_BPF_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_BPF_H
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/fs.h>
#include <linux/tracepoint.h>
#define __PROG_TYPE_MAP(FN) \
FN(SOCKET_FILTER) \
FN(KPROBE) \
FN(SCHED_CLS) \
FN(SCHED_ACT) \
FN(TRACEPOINT) \
FN(XDP) \
FN(PERF_EVENT) \
FN(CGROUP_SKB) \
FN(CGROUP_SOCK) \
FN(LWT_IN) \
FN(LWT_OUT) \
FN(LWT_XMIT)
#define __MAP_TYPE_MAP(FN) \
FN(HASH) \
FN(ARRAY) \
FN(PROG_ARRAY) \
FN(PERF_EVENT_ARRAY) \
FN(PERCPU_HASH) \
FN(PERCPU_ARRAY) \
FN(STACK_TRACE) \
FN(CGROUP_ARRAY) \
FN(LRU_HASH) \
FN(LRU_PERCPU_HASH) \
FN(LPM_TRIE)
#define __PROG_TYPE_TP_FN(x) \
TRACE_DEFINE_ENUM(BPF_PROG_TYPE_##x);
#define __PROG_TYPE_SYM_FN(x) \
{ BPF_PROG_TYPE_##x, #x },
#define __PROG_TYPE_SYM_TAB \
__PROG_TYPE_MAP(__PROG_TYPE_SYM_FN) { -1, 0 }
__PROG_TYPE_MAP(__PROG_TYPE_TP_FN)
#define __MAP_TYPE_TP_FN(x) \
TRACE_DEFINE_ENUM(BPF_MAP_TYPE_##x);
#define __MAP_TYPE_SYM_FN(x) \
{ BPF_MAP_TYPE_##x, #x },
#define __MAP_TYPE_SYM_TAB \
__MAP_TYPE_MAP(__MAP_TYPE_SYM_FN) { -1, 0 }
__MAP_TYPE_MAP(__MAP_TYPE_TP_FN)
DECLARE_EVENT_CLASS(bpf_prog_event,
TP_PROTO(const struct bpf_prog *prg),
TP_ARGS(prg),
TP_STRUCT__entry(
__array(u8, prog_tag, 8)
__field(u32, type)
),
TP_fast_assign(
BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag));
memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
__entry->type = prg->type;
),
TP_printk("prog=%s type=%s",
__print_hex_str(__entry->prog_tag, 8),
__print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB))
);
DEFINE_EVENT(bpf_prog_event, bpf_prog_get_type,
TP_PROTO(const struct bpf_prog *prg),
TP_ARGS(prg)
);
DEFINE_EVENT(bpf_prog_event, bpf_prog_put_rcu,
TP_PROTO(const struct bpf_prog *prg),
TP_ARGS(prg)
);
TRACE_EVENT(bpf_prog_load,
TP_PROTO(const struct bpf_prog *prg, int ufd),
TP_ARGS(prg, ufd),
TP_STRUCT__entry(
__array(u8, prog_tag, 8)
__field(u32, type)
__field(int, ufd)
),
TP_fast_assign(
BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag));
memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
__entry->type = prg->type;
__entry->ufd = ufd;
),
TP_printk("prog=%s type=%s ufd=%d",
__print_hex_str(__entry->prog_tag, 8),
__print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB),
__entry->ufd)
);
TRACE_EVENT(bpf_map_create,
TP_PROTO(const struct bpf_map *map, int ufd),
TP_ARGS(map, ufd),
TP_STRUCT__entry(
__field(u32, type)
__field(u32, size_key)
__field(u32, size_value)
__field(u32, max_entries)
__field(u32, flags)
__field(int, ufd)
),
TP_fast_assign(
__entry->type = map->map_type;
__entry->size_key = map->key_size;
__entry->size_value = map->value_size;
__entry->max_entries = map->max_entries;
__entry->flags = map->map_flags;
__entry->ufd = ufd;
),
TP_printk("map type=%s ufd=%d key=%u val=%u max=%u flags=%x",
__print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB),
__entry->ufd, __entry->size_key, __entry->size_value,
__entry->max_entries, __entry->flags)
);
DECLARE_EVENT_CLASS(bpf_obj_prog,
TP_PROTO(const struct bpf_prog *prg, int ufd,
const struct filename *pname),
TP_ARGS(prg, ufd, pname),
TP_STRUCT__entry(
__array(u8, prog_tag, 8)
__field(int, ufd)
__string(path, pname->name)
),
TP_fast_assign(
BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag));
memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag));
__assign_str(path, pname->name);
__entry->ufd = ufd;
),
TP_printk("prog=%s path=%s ufd=%d",
__print_hex_str(__entry->prog_tag, 8),
__get_str(path), __entry->ufd)
);
DEFINE_EVENT(bpf_obj_prog, bpf_obj_pin_prog,
TP_PROTO(const struct bpf_prog *prg, int ufd,
const struct filename *pname),
TP_ARGS(prg, ufd, pname)
);
DEFINE_EVENT(bpf_obj_prog, bpf_obj_get_prog,
TP_PROTO(const struct bpf_prog *prg, int ufd,
const struct filename *pname),
TP_ARGS(prg, ufd, pname)
);
DECLARE_EVENT_CLASS(bpf_obj_map,
TP_PROTO(const struct bpf_map *map, int ufd,
const struct filename *pname),
TP_ARGS(map, ufd, pname),
TP_STRUCT__entry(
__field(u32, type)
__field(int, ufd)
__string(path, pname->name)
),
TP_fast_assign(
__assign_str(path, pname->name);
__entry->type = map->map_type;
__entry->ufd = ufd;
),
TP_printk("map type=%s ufd=%d path=%s",
__print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB),
__entry->ufd, __get_str(path))
);
DEFINE_EVENT(bpf_obj_map, bpf_obj_pin_map,
TP_PROTO(const struct bpf_map *map, int ufd,
const struct filename *pname),
TP_ARGS(map, ufd, pname)
);
DEFINE_EVENT(bpf_obj_map, bpf_obj_get_map,
TP_PROTO(const struct bpf_map *map, int ufd,
const struct filename *pname),
TP_ARGS(map, ufd, pname)
);
DECLARE_EVENT_CLASS(bpf_map_keyval,
TP_PROTO(const struct bpf_map *map, int ufd,
const void *key, const void *val),
TP_ARGS(map, ufd, key, val),
TP_STRUCT__entry(
__field(u32, type)
__field(u32, key_len)
__dynamic_array(u8, key, map->key_size)
__field(bool, key_trunc)
__field(u32, val_len)
__dynamic_array(u8, val, map->value_size)
__field(bool, val_trunc)
__field(int, ufd)
),
TP_fast_assign(
memcpy(__get_dynamic_array(key), key, map->key_size);
memcpy(__get_dynamic_array(val), val, map->value_size);
__entry->type = map->map_type;
__entry->key_len = min(map->key_size, 16U);
__entry->key_trunc = map->key_size != __entry->key_len;
__entry->val_len = min(map->value_size, 16U);
__entry->val_trunc = map->value_size != __entry->val_len;
__entry->ufd = ufd;
),
TP_printk("map type=%s ufd=%d key=[%s%s] val=[%s%s]",
__print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB),
__entry->ufd,
__print_hex(__get_dynamic_array(key), __entry->key_len),
__entry->key_trunc ? " ..." : "",
__print_hex(__get_dynamic_array(val), __entry->val_len),
__entry->val_trunc ? " ..." : "")
);
DEFINE_EVENT(bpf_map_keyval, bpf_map_lookup_elem,
TP_PROTO(const struct bpf_map *map, int ufd,
const void *key, const void *val),
TP_ARGS(map, ufd, key, val)
);
DEFINE_EVENT(bpf_map_keyval, bpf_map_update_elem,
TP_PROTO(const struct bpf_map *map, int ufd,
const void *key, const void *val),
TP_ARGS(map, ufd, key, val)
);
TRACE_EVENT(bpf_map_delete_elem,
TP_PROTO(const struct bpf_map *map, int ufd,
const void *key),
TP_ARGS(map, ufd, key),
TP_STRUCT__entry(
__field(u32, type)
__field(u32, key_len)
__dynamic_array(u8, key, map->key_size)
__field(bool, key_trunc)
__field(int, ufd)
),
TP_fast_assign(
memcpy(__get_dynamic_array(key), key, map->key_size);
__entry->type = map->map_type;
__entry->key_len = min(map->key_size, 16U);
__entry->key_trunc = map->key_size != __entry->key_len;
__entry->ufd = ufd;
),
TP_printk("map type=%s ufd=%d key=[%s%s]",
__print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB),
__entry->ufd,
__print_hex(__get_dynamic_array(key), __entry->key_len),
__entry->key_trunc ? " ..." : "")
);
TRACE_EVENT(bpf_map_next_key,
TP_PROTO(const struct bpf_map *map, int ufd,
const void *key, const void *key_next),
TP_ARGS(map, ufd, key, key_next),
TP_STRUCT__entry(
__field(u32, type)
__field(u32, key_len)
__dynamic_array(u8, key, map->key_size)
__dynamic_array(u8, nxt, map->key_size)
__field(bool, key_trunc)
__field(int, ufd)
),
TP_fast_assign(
memcpy(__get_dynamic_array(key), key, map->key_size);
memcpy(__get_dynamic_array(nxt), key_next, map->key_size);
__entry->type = map->map_type;
__entry->key_len = min(map->key_size, 16U);
__entry->key_trunc = map->key_size != __entry->key_len;
__entry->ufd = ufd;
),
TP_printk("map type=%s ufd=%d key=[%s%s] next=[%s%s]",
__print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB),
__entry->ufd,
__print_hex(__get_dynamic_array(key), __entry->key_len),
__entry->key_trunc ? " ..." : "",
__print_hex(__get_dynamic_array(nxt), __entry->key_len),
__entry->key_trunc ? " ..." : "")
);
#endif /* _TRACE_BPF_H */
#include <trace/define_trace.h>