[linux-2.6-block.git] / tools / lib / bpf / libbpf_probes.c

// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
/* Copyright (c) 2019 Netronome Systems, Inc. */

#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <net/if.h>
#include <sys/utsname.h>

#include <linux/btf.h>
#include <linux/filter.h>
#include <linux/kernel.h>

#include "bpf.h"
#include "libbpf.h"
#include "libbpf_internal.h"

static bool grep(const char *buffer, const char *pattern)
{
	return !!strstr(buffer, pattern);
}

static int get_vendor_id(int ifindex)
{
	char ifname[IF_NAMESIZE], path[64], buf[8];
	ssize_t len;
	int fd;

	if (!if_indextoname(ifindex, ifname))
		return -1;

	snprintf(path, sizeof(path), "/sys/class/net/%s/device/vendor", ifname);

	fd = open(path, O_RDONLY);
	if (fd < 0)
		return -1;

	len = read(fd, buf, sizeof(buf));
	close(fd);
	if (len < 0)
		return -1;
	if (len >= (ssize_t)sizeof(buf))
		return -1;
	buf[len] = '\0';

	return strtol(buf, NULL, 0);
}

static int get_kernel_version(void)
{
	int version, subversion, patchlevel;
	struct utsname utsn;

	/* Return 0 on failure, and attempt to probe with empty kversion */
	if (uname(&utsn))
		return 0;

	if (sscanf(utsn.release, "%d.%d.%d",
		   &version, &subversion, &patchlevel) != 3)
		return 0;

	return (version << 16) + (subversion << 8) + patchlevel;
}

static void
probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
	   size_t insns_cnt, char *buf, size_t buf_len, __u32 ifindex)
{
	struct bpf_load_program_attr xattr = {};
	int fd;

	switch (prog_type) {
	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
		xattr.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
		break;
	case BPF_PROG_TYPE_KPROBE:
		xattr.kern_version = get_kernel_version();
		break;
	case BPF_PROG_TYPE_UNSPEC:
	case BPF_PROG_TYPE_SOCKET_FILTER:
	case BPF_PROG_TYPE_SCHED_CLS:
	case BPF_PROG_TYPE_SCHED_ACT:
	case BPF_PROG_TYPE_TRACEPOINT:
	case BPF_PROG_TYPE_XDP:
	case BPF_PROG_TYPE_PERF_EVENT:
	case BPF_PROG_TYPE_CGROUP_SKB:
	case BPF_PROG_TYPE_CGROUP_SOCK:
	case BPF_PROG_TYPE_LWT_IN:
	case BPF_PROG_TYPE_LWT_OUT:
	case BPF_PROG_TYPE_LWT_XMIT:
	case BPF_PROG_TYPE_SOCK_OPS:
	case BPF_PROG_TYPE_SK_SKB:
	case BPF_PROG_TYPE_CGROUP_DEVICE:
	case BPF_PROG_TYPE_SK_MSG:
	case BPF_PROG_TYPE_RAW_TRACEPOINT:
	case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
	case BPF_PROG_TYPE_LWT_SEG6LOCAL:
	case BPF_PROG_TYPE_LIRC_MODE2:
	case BPF_PROG_TYPE_SK_REUSEPORT:
	case BPF_PROG_TYPE_FLOW_DISSECTOR:
	case BPF_PROG_TYPE_CGROUP_SYSCTL:
	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
	case BPF_PROG_TYPE_TRACING:
	default:
		break;
	}

	xattr.prog_type = prog_type;
	xattr.insns = insns;
	xattr.insns_cnt = insns_cnt;
	xattr.license = "GPL";
	xattr.prog_ifindex = ifindex;

	fd = bpf_load_program_xattr(&xattr, buf, buf_len);
	if (fd >= 0)
		close(fd);
}

bool bpf_probe_prog_type(enum bpf_prog_type prog_type, __u32 ifindex)
{
	struct bpf_insn insns[2] = {
		BPF_MOV64_IMM(BPF_REG_0, 0),
		BPF_EXIT_INSN()
	};

	if (ifindex && prog_type == BPF_PROG_TYPE_SCHED_CLS)
		/* nfp returns -EINVAL on exit(0) with TC offload */
		insns[0].imm = 2;

	errno = 0;
	probe_load(prog_type, insns, ARRAY_SIZE(insns), NULL, 0, ifindex);

	return errno != EINVAL && errno != EOPNOTSUPP;
}

int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
			 const char *str_sec, size_t str_len)
{
	struct btf_header hdr = {
		.magic = BTF_MAGIC,
		.version = BTF_VERSION,
		.hdr_len = sizeof(struct btf_header),
		.type_len = types_len,
		.str_off = types_len,
		.str_len = str_len,
	};
	int btf_fd, btf_len;
	__u8 *raw_btf;

	btf_len = hdr.hdr_len + hdr.type_len + hdr.str_len;
	raw_btf = malloc(btf_len);
	if (!raw_btf)
		return -ENOMEM;

	memcpy(raw_btf, &hdr, sizeof(hdr));
	memcpy(raw_btf + hdr.hdr_len, raw_types, hdr.type_len);
	memcpy(raw_btf + hdr.hdr_len + hdr.type_len, str_sec, hdr.str_len);

	btf_fd = bpf_load_btf(raw_btf, btf_len, NULL, 0, false);

	free(raw_btf);
	return btf_fd;
}

static int load_sk_storage_btf(void)
{
	const char strs[] = "\0bpf_spin_lock\0val\0cnt\0l";
	/* struct bpf_spin_lock {
	 *   int val;
	 * };
	 * struct val {
	 *   int cnt;
	 *   struct bpf_spin_lock l;
	 * };
	 */
	__u32 types[] = {
		/* int */
		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
		/* struct bpf_spin_lock */                      /* [2] */
		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),
		BTF_MEMBER_ENC(15, 1, 0), /* int val; */
		/* struct val */                                /* [3] */
		BTF_TYPE_ENC(15, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
		BTF_MEMBER_ENC(19, 1, 0), /* int cnt; */
		BTF_MEMBER_ENC(23, 2, 32),/* struct bpf_spin_lock l; */
	};

	return libbpf__load_raw_btf((char *)types, sizeof(types),
				     strs, sizeof(strs));
}

bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
{
	int key_size, value_size, max_entries, map_flags;
	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
	struct bpf_create_map_attr attr = {};
	int fd = -1, btf_fd = -1, fd_inner;

	key_size	= sizeof(__u32);
	value_size	= sizeof(__u32);
	max_entries	= 1;
	map_flags	= 0;

	switch (map_type) {
	case BPF_MAP_TYPE_STACK_TRACE:
		value_size	= sizeof(__u64);
		break;
	case BPF_MAP_TYPE_LPM_TRIE:
		key_size	= sizeof(__u64);
		value_size	= sizeof(__u64);
		map_flags	= BPF_F_NO_PREALLOC;
		break;
	case BPF_MAP_TYPE_CGROUP_STORAGE:
	case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE:
		key_size	= sizeof(struct bpf_cgroup_storage_key);
		value_size	= sizeof(__u64);
		max_entries	= 0;
		break;
	case BPF_MAP_TYPE_QUEUE:
	case BPF_MAP_TYPE_STACK:
		key_size	= 0;
		break;
	case BPF_MAP_TYPE_SK_STORAGE:
		btf_key_type_id = 1;
		btf_value_type_id = 3;
		value_size = 8;
		max_entries = 0;
		map_flags = BPF_F_NO_PREALLOC;
		btf_fd = load_sk_storage_btf();
		if (btf_fd < 0)
			return false;
		break;
	case BPF_MAP_TYPE_UNSPEC:
	case BPF_MAP_TYPE_HASH:
	case BPF_MAP_TYPE_ARRAY:
	case BPF_MAP_TYPE_PROG_ARRAY:
	case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
	case BPF_MAP_TYPE_PERCPU_HASH:
	case BPF_MAP_TYPE_PERCPU_ARRAY:
	case BPF_MAP_TYPE_CGROUP_ARRAY:
	case BPF_MAP_TYPE_LRU_HASH:
	case BPF_MAP_TYPE_LRU_PERCPU_HASH:
	case BPF_MAP_TYPE_ARRAY_OF_MAPS:
	case BPF_MAP_TYPE_HASH_OF_MAPS:
	case BPF_MAP_TYPE_DEVMAP:
	case BPF_MAP_TYPE_DEVMAP_HASH:
	case BPF_MAP_TYPE_SOCKMAP:
	case BPF_MAP_TYPE_CPUMAP:
	case BPF_MAP_TYPE_XSKMAP:
	case BPF_MAP_TYPE_SOCKHASH:
	case BPF_MAP_TYPE_REUSEPORT_SOCKARRAY:
	default:
		break;
	}

	if (map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
	    map_type == BPF_MAP_TYPE_HASH_OF_MAPS) {
		/* TODO: probe for device, once libbpf has a function to create
		 * map-in-map for offload
		 */
		if (ifindex)
			return false;

		fd_inner = bpf_create_map(BPF_MAP_TYPE_HASH,
					  sizeof(__u32), sizeof(__u32), 1, 0);
		if (fd_inner < 0)
			return false;
		fd = bpf_create_map_in_map(map_type, NULL, sizeof(__u32),
					   fd_inner, 1, 0);
		close(fd_inner);
	} else {
		/* Note: No other restriction on map type probes for offload */
		attr.map_type = map_type;
		attr.key_size = key_size;
		attr.value_size = value_size;
		attr.max_entries = max_entries;
		attr.map_flags = map_flags;
		attr.map_ifindex = ifindex;
		if (btf_fd >= 0) {
			attr.btf_fd = btf_fd;
			attr.btf_key_type_id = btf_key_type_id;
			attr.btf_value_type_id = btf_value_type_id;
		}

		fd = bpf_create_map_xattr(&attr);
	}
	if (fd >= 0)
		close(fd);
	if (btf_fd >= 0)
		close(btf_fd);

	return fd >= 0;
}

bool bpf_probe_helper(enum bpf_func_id id, enum bpf_prog_type prog_type,
		      __u32 ifindex)
{
	struct bpf_insn insns[2] = {
		BPF_EMIT_CALL(id),
		BPF_EXIT_INSN()
	};
	char buf[4096] = {};
	bool res;

	probe_load(prog_type, insns, ARRAY_SIZE(insns), buf, sizeof(buf),
		   ifindex);
	res = !grep(buf, "invalid func ") && !grep(buf, "unknown func ");

	if (ifindex) {
		switch (get_vendor_id(ifindex)) {
		case 0x19ee: /* Netronome specific */
			res = res && !grep(buf, "not supported by FW") &&
				!grep(buf, "unsupported function id");
			break;
		default:
			break;
		}
	}

	return res;
}
Commit	Line	Data
1bf4b058 QM	1	// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
	2	/* Copyright (c) 2019 Netronome Systems, Inc. */
	3
	4	#include <errno.h>
2d3ea5e8 QM	5	#include <fcntl.h>
	6	#include <string.h>
	7	#include <stdlib.h>
1bf4b058	8	#include <unistd.h>
2d3ea5e8	9	#include <net/if.h>
1bf4b058 QM	10	#include <sys/utsname.h>
1bf4b058 QM	11
a19f89f3	12	#include <linux/btf.h>
1bf4b058 QM	13	#include <linux/filter.h>
	14	#include <linux/kernel.h>
	15
	16	#include "bpf.h"
	17	#include "libbpf.h"
d7c4b398	18	#include "libbpf_internal.h"
1bf4b058	19
2d3ea5e8 QM	20	static bool grep(const char buffer, const char pattern)
	21	{
	22	return !!strstr(buffer, pattern);
	23	}
	24
	25	static int get_vendor_id(int ifindex)
	26	{
	27	char ifname[IF_NAMESIZE], path[64], buf[8];
	28	ssize_t len;
	29	int fd;
	30
	31	if (!if_indextoname(ifindex, ifname))
	32	return -1;
	33
	34	snprintf(path, sizeof(path), "/sys/class/net/%s/device/vendor", ifname);
	35
	36	fd = open(path, O_RDONLY);
	37	if (fd < 0)
	38	return -1;
	39
	40	len = read(fd, buf, sizeof(buf));
	41	close(fd);
	42	if (len < 0)
	43	return -1;
	44	if (len >= (ssize_t)sizeof(buf))
	45	return -1;
	46	buf[len] = '\0';
	47
	48	return strtol(buf, NULL, 0);
	49	}
	50
1bf4b058 QM	51	static int get_kernel_version(void)
	52	{
	53	int version, subversion, patchlevel;
	54	struct utsname utsn;
	55
	56	/* Return 0 on failure, and attempt to probe with empty kversion */
	57	if (uname(&utsn))
	58	return 0;
	59
	60	if (sscanf(utsn.release, "%d.%d.%d",
	61	&version, &subversion, &patchlevel) != 3)
	62	return 0;
	63
	64	return (version << 16) + (subversion << 8) + patchlevel;
	65	}
	66
	67	static void
	68	probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
	69	size_t insns_cnt, char *buf, size_t buf_len, __u32 ifindex)
	70	{
	71	struct bpf_load_program_attr xattr = {};
	72	int fd;
	73
	74	switch (prog_type) {
	75	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
	76	xattr.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
	77	break;
	78	case BPF_PROG_TYPE_KPROBE:
	79	xattr.kern_version = get_kernel_version();
	80	break;
	81	case BPF_PROG_TYPE_UNSPEC:
	82	case BPF_PROG_TYPE_SOCKET_FILTER:
	83	case BPF_PROG_TYPE_SCHED_CLS:
	84	case BPF_PROG_TYPE_SCHED_ACT:
	85	case BPF_PROG_TYPE_TRACEPOINT:
	86	case BPF_PROG_TYPE_XDP:
	87	case BPF_PROG_TYPE_PERF_EVENT:
	88	case BPF_PROG_TYPE_CGROUP_SKB:
	89	case BPF_PROG_TYPE_CGROUP_SOCK:
	90	case BPF_PROG_TYPE_LWT_IN:
	91	case BPF_PROG_TYPE_LWT_OUT:
	92	case BPF_PROG_TYPE_LWT_XMIT:
	93	case BPF_PROG_TYPE_SOCK_OPS:
	94	case BPF_PROG_TYPE_SK_SKB:
	95	case BPF_PROG_TYPE_CGROUP_DEVICE:
	96	case BPF_PROG_TYPE_SK_MSG:
	97	case BPF_PROG_TYPE_RAW_TRACEPOINT:
4635b0ae	98	case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
1bf4b058 QM	99	case BPF_PROG_TYPE_LWT_SEG6LOCAL:
	100	case BPF_PROG_TYPE_LIRC_MODE2:
	101	case BPF_PROG_TYPE_SK_REUSEPORT:
	102	case BPF_PROG_TYPE_FLOW_DISSECTOR:
063cc9f0	103	case BPF_PROG_TYPE_CGROUP_SYSCTL:
4cdbfb59	104	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
12a8654b	105	case BPF_PROG_TYPE_TRACING:
1bf4b058 QM	106	default:
	107	break;
	108	}
	109
	110	xattr.prog_type = prog_type;
	111	xattr.insns = insns;
	112	xattr.insns_cnt = insns_cnt;
	113	xattr.license = "GPL";
	114	xattr.prog_ifindex = ifindex;
	115
	116	fd = bpf_load_program_xattr(&xattr, buf, buf_len);
	117	if (fd >= 0)
	118	close(fd);
	119	}
	120
	121	bool bpf_probe_prog_type(enum bpf_prog_type prog_type, __u32 ifindex)
	122	{
	123	struct bpf_insn insns[2] = {
	124	BPF_MOV64_IMM(BPF_REG_0, 0),
	125	BPF_EXIT_INSN()
	126	};
	127
	128	if (ifindex && prog_type == BPF_PROG_TYPE_SCHED_CLS)
	129	/* nfp returns -EINVAL on exit(0) with TC offload */
	130	insns[0].imm = 2;
	131
	132	errno = 0;
	133	probe_load(prog_type, insns, ARRAY_SIZE(insns), NULL, 0, ifindex);
	134
	135	return errno != EINVAL && errno != EOPNOTSUPP;
	136	}
f99e1663	137
cfd49210 MR	138	int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
cfd49210 MR	139	const char *str_sec, size_t str_len)
a19f89f3	140	{
d7c4b398 AN	141	struct btf_header hdr = {
	142	.magic = BTF_MAGIC,
	143	.version = BTF_VERSION,
	144	.hdr_len = sizeof(struct btf_header),
	145	.type_len = types_len,
	146	.str_off = types_len,
	147	.str_len = str_len,
	148	};
	149	int btf_fd, btf_len;
	150	__u8 *raw_btf;
	151
	152	btf_len = hdr.hdr_len + hdr.type_len + hdr.str_len;
	153	raw_btf = malloc(btf_len);
	154	if (!raw_btf)
	155	return -ENOMEM;
	156
	157	memcpy(raw_btf, &hdr, sizeof(hdr));
	158	memcpy(raw_btf + hdr.hdr_len, raw_types, hdr.type_len);
	159	memcpy(raw_btf + hdr.hdr_len + hdr.type_len, str_sec, hdr.str_len);
	160
	161	btf_fd = bpf_load_btf(raw_btf, btf_len, NULL, 0, false);
d7c4b398	162
d7c4b398	163	free(raw_btf);
cfd49210	164	return btf_fd;
d7c4b398 AN	165	}
	166
	167	static int load_sk_storage_btf(void)
	168	{
	169	const char strs[] = "\0bpf_spin_lock\0val\0cnt\0l";
a19f89f3 MKL	170	/* struct bpf_spin_lock {
	171	* int val;
	172	* };
	173	* struct val {
	174	* int cnt;
	175	* struct bpf_spin_lock l;
	176	* };
	177	*/
d7c4b398	178	__u32 types[] = {
a19f89f3 MKL	179	/* int */
	180	BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
	181	/* struct bpf_spin_lock / / [2] */
	182	BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),
	183	BTF_MEMBER_ENC(15, 1, 0), /* int val; */
	184	/* struct val / / [3] */
	185	BTF_TYPE_ENC(15, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
	186	BTF_MEMBER_ENC(19, 1, 0), /* int cnt; */
	187	BTF_MEMBER_ENC(23, 2, 32),/* struct bpf_spin_lock l; */
	188	};
a19f89f3	189
cfd49210	190	return libbpf__load_raw_btf((char *)types, sizeof(types),
d7c4b398	191	strs, sizeof(strs));
a19f89f3 MKL	192	}
a19f89f3 MKL	193
f99e1663 QM	194	bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
	195	{
	196	int key_size, value_size, max_entries, map_flags;
a19f89f3	197	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
f99e1663	198	struct bpf_create_map_attr attr = {};
a19f89f3	199	int fd = -1, btf_fd = -1, fd_inner;
f99e1663 QM	200
	201	key_size = sizeof(__u32);
	202	value_size = sizeof(__u32);
	203	max_entries = 1;
	204	map_flags = 0;
	205
	206	switch (map_type) {
	207	case BPF_MAP_TYPE_STACK_TRACE:
	208	value_size = sizeof(__u64);
	209	break;
	210	case BPF_MAP_TYPE_LPM_TRIE:
	211	key_size = sizeof(__u64);
	212	value_size = sizeof(__u64);
	213	map_flags = BPF_F_NO_PREALLOC;
	214	break;
	215	case BPF_MAP_TYPE_CGROUP_STORAGE:
	216	case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE:
	217	key_size = sizeof(struct bpf_cgroup_storage_key);
	218	value_size = sizeof(__u64);
	219	max_entries = 0;
	220	break;
	221	case BPF_MAP_TYPE_QUEUE:
	222	case BPF_MAP_TYPE_STACK:
	223	key_size = 0;
	224	break;
a19f89f3 MKL	225	case BPF_MAP_TYPE_SK_STORAGE:
	226	btf_key_type_id = 1;
	227	btf_value_type_id = 3;
	228	value_size = 8;
	229	max_entries = 0;
	230	map_flags = BPF_F_NO_PREALLOC;
d7c4b398	231	btf_fd = load_sk_storage_btf();
a19f89f3 MKL	232	if (btf_fd < 0)
	233	return false;
	234	break;
f99e1663 QM	235	case BPF_MAP_TYPE_UNSPEC:
	236	case BPF_MAP_TYPE_HASH:
	237	case BPF_MAP_TYPE_ARRAY:
	238	case BPF_MAP_TYPE_PROG_ARRAY:
	239	case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
	240	case BPF_MAP_TYPE_PERCPU_HASH:
	241	case BPF_MAP_TYPE_PERCPU_ARRAY:
	242	case BPF_MAP_TYPE_CGROUP_ARRAY:
	243	case BPF_MAP_TYPE_LRU_HASH:
	244	case BPF_MAP_TYPE_LRU_PERCPU_HASH:
	245	case BPF_MAP_TYPE_ARRAY_OF_MAPS:
	246	case BPF_MAP_TYPE_HASH_OF_MAPS:
	247	case BPF_MAP_TYPE_DEVMAP:
e4234619	248	case BPF_MAP_TYPE_DEVMAP_HASH:
f99e1663 QM	249	case BPF_MAP_TYPE_SOCKMAP:
	250	case BPF_MAP_TYPE_CPUMAP:
	251	case BPF_MAP_TYPE_XSKMAP:
	252	case BPF_MAP_TYPE_SOCKHASH:
	253	case BPF_MAP_TYPE_REUSEPORT_SOCKARRAY:
	254	default:
	255	break;
	256	}
	257
	258	if (map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS \|\|
	259	map_type == BPF_MAP_TYPE_HASH_OF_MAPS) {
	260	/* TODO: probe for device, once libbpf has a function to create
	261	* map-in-map for offload
	262	*/
	263	if (ifindex)
	264	return false;
	265
	266	fd_inner = bpf_create_map(BPF_MAP_TYPE_HASH,
	267	sizeof(__u32), sizeof(__u32), 1, 0);
	268	if (fd_inner < 0)
	269	return false;
	270	fd = bpf_create_map_in_map(map_type, NULL, sizeof(__u32),
	271	fd_inner, 1, 0);
	272	close(fd_inner);
	273	} else {
	274	/* Note: No other restriction on map type probes for offload */
	275	attr.map_type = map_type;
	276	attr.key_size = key_size;
	277	attr.value_size = value_size;
	278	attr.max_entries = max_entries;
	279	attr.map_flags = map_flags;
	280	attr.map_ifindex = ifindex;
a19f89f3 MKL	281	if (btf_fd >= 0) {
	282	attr.btf_fd = btf_fd;
	283	attr.btf_key_type_id = btf_key_type_id;
	284	attr.btf_value_type_id = btf_value_type_id;
	285	}
f99e1663 QM	286
	287	fd = bpf_create_map_xattr(&attr);
	288	}
	289	if (fd >= 0)
	290	close(fd);
a19f89f3 MKL	291	if (btf_fd >= 0)
a19f89f3 MKL	292	close(btf_fd);
f99e1663 QM	293
	294	return fd >= 0;
	295	}
2d3ea5e8 QM	296
	297	bool bpf_probe_helper(enum bpf_func_id id, enum bpf_prog_type prog_type,
	298	__u32 ifindex)
	299	{
	300	struct bpf_insn insns[2] = {
	301	BPF_EMIT_CALL(id),
	302	BPF_EXIT_INSN()
	303	};
	304	char buf[4096] = {};
	305	bool res;
	306
	307	probe_load(prog_type, insns, ARRAY_SIZE(insns), buf, sizeof(buf),
	308	ifindex);
	309	res = !grep(buf, "invalid func ") && !grep(buf, "unknown func ");
	310
	311	if (ifindex) {
	312	switch (get_vendor_id(ifindex)) {
	313	case 0x19ee: /* Netronome specific */
	314	res = res && !grep(buf, "not supported by FW") &&
	315	!grep(buf, "unsupported function id");
	316	break;
	317	default:
	318	break;
	319	}
	320	}
	321
	322	return res;
	323	}