Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* Copyright (c) 2019 Netronome Systems, Inc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <net/if.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <sys/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/btf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/filter.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "bpf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "libbpf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "libbpf_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) static bool grep(const char *buffer, const char *pattern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	return !!strstr(buffer, pattern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static int get_vendor_id(int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	char ifname[IF_NAMESIZE], path[64], buf[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	ssize_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (!if_indextoname(ifindex, ifname))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	snprintf(path, sizeof(path), "/sys/class/net/%s/device/vendor", ifname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	fd = open(path, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	len = read(fd, buf, sizeof(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	if (len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (len >= (ssize_t)sizeof(buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	buf[len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return strtol(buf, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int get_kernel_version(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	int version, subversion, patchlevel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct utsname utsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	/* Return 0 on failure, and attempt to probe with empty kversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (uname(&utsn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (sscanf(utsn.release, "%d.%d.%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		   &version, &subversion, &patchlevel) != 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	return (version << 16) + (subversion << 8) + patchlevel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	   size_t insns_cnt, char *buf, size_t buf_len, __u32 ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct bpf_load_program_attr xattr = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	switch (prog_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		xattr.expected_attach_type = BPF_CGROUP_INET4_CONNECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		xattr.expected_attach_type = BPF_CGROUP_GETSOCKOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	case BPF_PROG_TYPE_SK_LOOKUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		xattr.expected_attach_type = BPF_SK_LOOKUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	case BPF_PROG_TYPE_KPROBE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		xattr.kern_version = get_kernel_version();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	case BPF_PROG_TYPE_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	case BPF_PROG_TYPE_SOCKET_FILTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	case BPF_PROG_TYPE_SCHED_CLS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	case BPF_PROG_TYPE_SCHED_ACT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	case BPF_PROG_TYPE_TRACEPOINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	case BPF_PROG_TYPE_XDP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	case BPF_PROG_TYPE_PERF_EVENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	case BPF_PROG_TYPE_CGROUP_SKB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	case BPF_PROG_TYPE_CGROUP_SOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	case BPF_PROG_TYPE_LWT_IN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	case BPF_PROG_TYPE_LWT_OUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	case BPF_PROG_TYPE_LWT_XMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	case BPF_PROG_TYPE_SOCK_OPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	case BPF_PROG_TYPE_SK_SKB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	case BPF_PROG_TYPE_CGROUP_DEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	case BPF_PROG_TYPE_SK_MSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	case BPF_PROG_TYPE_RAW_TRACEPOINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	case BPF_PROG_TYPE_LWT_SEG6LOCAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	case BPF_PROG_TYPE_LIRC_MODE2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	case BPF_PROG_TYPE_SK_REUSEPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	case BPF_PROG_TYPE_TRACING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	case BPF_PROG_TYPE_STRUCT_OPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	case BPF_PROG_TYPE_EXT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	case BPF_PROG_TYPE_LSM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	xattr.prog_type = prog_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	xattr.insns = insns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	xattr.insns_cnt = insns_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	xattr.license = "GPL";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	xattr.prog_ifindex = ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	fd = bpf_load_program_xattr(&xattr, buf, buf_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (fd >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) bool bpf_probe_prog_type(enum bpf_prog_type prog_type, __u32 ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct bpf_insn insns[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		BPF_MOV64_IMM(BPF_REG_0, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		BPF_EXIT_INSN()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (ifindex && prog_type == BPF_PROG_TYPE_SCHED_CLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		/* nfp returns -EINVAL on exit(0) with TC offload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		insns[0].imm = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	probe_load(prog_type, insns, ARRAY_SIZE(insns), NULL, 0, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return errno != EINVAL && errno != EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			 const char *str_sec, size_t str_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct btf_header hdr = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		.magic = BTF_MAGIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		.version = BTF_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		.hdr_len = sizeof(struct btf_header),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		.type_len = types_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		.str_off = types_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		.str_len = str_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	int btf_fd, btf_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	__u8 *raw_btf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	btf_len = hdr.hdr_len + hdr.type_len + hdr.str_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	raw_btf = malloc(btf_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (!raw_btf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	memcpy(raw_btf, &hdr, sizeof(hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	memcpy(raw_btf + hdr.hdr_len, raw_types, hdr.type_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	memcpy(raw_btf + hdr.hdr_len + hdr.type_len, str_sec, hdr.str_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	btf_fd = bpf_load_btf(raw_btf, btf_len, NULL, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	free(raw_btf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return btf_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static int load_local_storage_btf(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	const char strs[] = "\0bpf_spin_lock\0val\0cnt\0l";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	/* struct bpf_spin_lock {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	 *   int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	 * };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	 * struct val {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	 *   int cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	 *   struct bpf_spin_lock l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	 * };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	__u32 types[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		/* int */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),  /* [1] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		/* struct bpf_spin_lock */                      /* [2] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		BTF_TYPE_ENC(1, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 1), 4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		BTF_MEMBER_ENC(15, 1, 0), /* int val; */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		/* struct val */                                /* [3] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		BTF_TYPE_ENC(15, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 2), 8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		BTF_MEMBER_ENC(19, 1, 0), /* int cnt; */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		BTF_MEMBER_ENC(23, 2, 32),/* struct bpf_spin_lock l; */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return libbpf__load_raw_btf((char *)types, sizeof(types),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 				     strs, sizeof(strs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) bool bpf_probe_map_type(enum bpf_map_type map_type, __u32 ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	int key_size, value_size, max_entries, map_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	struct bpf_create_map_attr attr = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	int fd = -1, btf_fd = -1, fd_inner;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	key_size	= sizeof(__u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	value_size	= sizeof(__u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	max_entries	= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	map_flags	= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	switch (map_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	case BPF_MAP_TYPE_STACK_TRACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		value_size	= sizeof(__u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	case BPF_MAP_TYPE_LPM_TRIE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		key_size	= sizeof(__u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		value_size	= sizeof(__u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		map_flags	= BPF_F_NO_PREALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	case BPF_MAP_TYPE_CGROUP_STORAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		key_size	= sizeof(struct bpf_cgroup_storage_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		value_size	= sizeof(__u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		max_entries	= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	case BPF_MAP_TYPE_QUEUE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	case BPF_MAP_TYPE_STACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		key_size	= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	case BPF_MAP_TYPE_SK_STORAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	case BPF_MAP_TYPE_INODE_STORAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		btf_key_type_id = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		btf_value_type_id = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		value_size = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		max_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		map_flags = BPF_F_NO_PREALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		btf_fd = load_local_storage_btf();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		if (btf_fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	case BPF_MAP_TYPE_RINGBUF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		key_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		value_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		max_entries = 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	case BPF_MAP_TYPE_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	case BPF_MAP_TYPE_HASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	case BPF_MAP_TYPE_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	case BPF_MAP_TYPE_PROG_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	case BPF_MAP_TYPE_PERCPU_HASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	case BPF_MAP_TYPE_PERCPU_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	case BPF_MAP_TYPE_CGROUP_ARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	case BPF_MAP_TYPE_LRU_HASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	case BPF_MAP_TYPE_LRU_PERCPU_HASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	case BPF_MAP_TYPE_ARRAY_OF_MAPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	case BPF_MAP_TYPE_HASH_OF_MAPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	case BPF_MAP_TYPE_DEVMAP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	case BPF_MAP_TYPE_DEVMAP_HASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	case BPF_MAP_TYPE_SOCKMAP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	case BPF_MAP_TYPE_CPUMAP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	case BPF_MAP_TYPE_XSKMAP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	case BPF_MAP_TYPE_SOCKHASH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	case BPF_MAP_TYPE_REUSEPORT_SOCKARRAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	case BPF_MAP_TYPE_STRUCT_OPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	if (map_type == BPF_MAP_TYPE_ARRAY_OF_MAPS ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	    map_type == BPF_MAP_TYPE_HASH_OF_MAPS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		/* TODO: probe for device, once libbpf has a function to create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		 * map-in-map for offload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		if (ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		fd_inner = bpf_create_map(BPF_MAP_TYPE_HASH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 					  sizeof(__u32), sizeof(__u32), 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		if (fd_inner < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		fd = bpf_create_map_in_map(map_type, NULL, sizeof(__u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 					   fd_inner, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		close(fd_inner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		/* Note: No other restriction on map type probes for offload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		attr.map_type = map_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		attr.key_size = key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		attr.value_size = value_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		attr.max_entries = max_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		attr.map_flags = map_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		attr.map_ifindex = ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		if (btf_fd >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			attr.btf_fd = btf_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 			attr.btf_key_type_id = btf_key_type_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			attr.btf_value_type_id = btf_value_type_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		fd = bpf_create_map_xattr(&attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	if (fd >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	if (btf_fd >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		close(btf_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	return fd >= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) bool bpf_probe_helper(enum bpf_func_id id, enum bpf_prog_type prog_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		      __u32 ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	struct bpf_insn insns[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		BPF_EMIT_CALL(id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		BPF_EXIT_INSN()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	char buf[4096] = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	bool res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	probe_load(prog_type, insns, ARRAY_SIZE(insns), buf, sizeof(buf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		   ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	res = !grep(buf, "invalid func ") && !grep(buf, "unknown func ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	if (ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		switch (get_vendor_id(ifindex)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		case 0x19ee: /* Netronome specific */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			res = res && !grep(buf, "not supported by FW") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 				!grep(buf, "unsupported function id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)  * Probe for availability of kernel commit (5.3):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)  * c04c0d2b968a ("bpf: increase complexity limit and maximum program size")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) bool bpf_probe_large_insn_limit(__u32 ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	struct bpf_insn insns[BPF_MAXINSNS + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	for (i = 0; i < BPF_MAXINSNS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		insns[i] = BPF_MOV64_IMM(BPF_REG_0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	insns[BPF_MAXINSNS] = BPF_EXIT_INSN();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	probe_load(BPF_PROG_TYPE_SCHED_CLS, insns, ARRAY_SIZE(insns), NULL, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		   ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	return errno != E2BIG && errno != EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }