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libbpf: Introduce libbpf_bpf_prog_type_str

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This change introduces a new function, libbpf_bpf_prog_type_str, to the
public libbpf API. The function allows users to get a string
representation for a bpf_prog_type variant.

Signed-off-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220523230428.3077108-2-deso@posteo.net
This commit is contained in:
Daniel Müller
2022-05-23 23:04:17 +00:00
committed by Andrii Nakryiko
parent f035838503
commit 4d9cd51e7e
3 changed files with 55 additions and 0 deletions
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43
src/libbpf.c
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@@ -72,6 +72,41 @@
static struct bpf_map *bpf_object__add_map(struct bpf_object *obj); static struct bpf_map *bpf_object__add_map(struct bpf_object *obj);
static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog); static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog);
static const char * const prog_type_name[] = {
[BPF_PROG_TYPE_UNSPEC] = "unspec",
[BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter",
[BPF_PROG_TYPE_KPROBE] = "kprobe",
[BPF_PROG_TYPE_SCHED_CLS] = "sched_cls",
[BPF_PROG_TYPE_SCHED_ACT] = "sched_act",
[BPF_PROG_TYPE_TRACEPOINT] = "tracepoint",
[BPF_PROG_TYPE_XDP] = "xdp",
[BPF_PROG_TYPE_PERF_EVENT] = "perf_event",
[BPF_PROG_TYPE_CGROUP_SKB] = "cgroup_skb",
[BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup_sock",
[BPF_PROG_TYPE_LWT_IN] = "lwt_in",
[BPF_PROG_TYPE_LWT_OUT] = "lwt_out",
[BPF_PROG_TYPE_LWT_XMIT] = "lwt_xmit",
[BPF_PROG_TYPE_SOCK_OPS] = "sock_ops",
[BPF_PROG_TYPE_SK_SKB] = "sk_skb",
[BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device",
[BPF_PROG_TYPE_SK_MSG] = "sk_msg",
[BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint",
[BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr",
[BPF_PROG_TYPE_LWT_SEG6LOCAL] = "lwt_seg6local",
[BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2",
[BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport",
[BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector",
[BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl",
[BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable",
[BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt",
[BPF_PROG_TYPE_TRACING] = "tracing",
[BPF_PROG_TYPE_STRUCT_OPS] = "struct_ops",
[BPF_PROG_TYPE_EXT] = "ext",
[BPF_PROG_TYPE_LSM] = "lsm",
[BPF_PROG_TYPE_SK_LOOKUP] = "sk_lookup",
[BPF_PROG_TYPE_SYSCALL] = "syscall",
};
static int __base_pr(enum libbpf_print_level level, const char *format, static int __base_pr(enum libbpf_print_level level, const char *format,
va_list args) va_list args)
{ {
@@ -9300,6 +9335,14 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
return libbpf_err(-ESRCH); return libbpf_err(-ESRCH);
} }
const char *libbpf_bpf_prog_type_str(enum bpf_prog_type t)
{
if (t < 0 || t >= ARRAY_SIZE(prog_type_name))
return NULL;
return prog_type_name[t];
}
static struct bpf_map *find_struct_ops_map_by_offset(struct bpf_object *obj, static struct bpf_map *find_struct_ops_map_by_offset(struct bpf_object *obj,
size_t offset) size_t offset)
{ {

9
src/libbpf.h
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@@ -51,6 +51,15 @@ enum libbpf_errno {
LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size); LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size);
/**
* @brief **libbpf_bpf_prog_type_str()** converts the provided program type
* value into a textual representation.
* @param t The program type.
* @return Pointer to a static string identifying the program type. NULL is
* returned for unknown **bpf_prog_type** values.
*/
LIBBPF_API const char *libbpf_bpf_prog_type_str(enum bpf_prog_type t);
enum libbpf_print_level { enum libbpf_print_level {
LIBBPF_WARN, LIBBPF_WARN,
LIBBPF_INFO, LIBBPF_INFO,

3
src/libbpf.map
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@@ -461,5 +461,8 @@ LIBBPF_0.8.0 {
} LIBBPF_0.7.0; } LIBBPF_0.7.0;
LIBBPF_1.0.0 { LIBBPF_1.0.0 {
global:
libbpf_bpf_prog_type_str;
local: *; local: *;
}; };