Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* Copyright (C) 2020 Facebook */
^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 <net/if.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <bpf/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "json_writer.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "main.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) static const char * const link_type_name[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	[BPF_LINK_TYPE_UNSPEC]			= "unspec",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	[BPF_LINK_TYPE_RAW_TRACEPOINT]		= "raw_tracepoint",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	[BPF_LINK_TYPE_TRACING]			= "tracing",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	[BPF_LINK_TYPE_CGROUP]			= "cgroup",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	[BPF_LINK_TYPE_ITER]			= "iter",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	[BPF_LINK_TYPE_NETNS]			= "netns",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static int link_parse_fd(int *argc, char ***argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	if (is_prefix(**argv, "id")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		unsigned int id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		char *endptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		NEXT_ARGP();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		id = strtoul(**argv, &endptr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		if (*endptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 			p_err("can't parse %s as ID", **argv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		NEXT_ARGP();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		fd = bpf_link_get_fd_by_id(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 			p_err("failed to get link with ID %d: %s", id, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	} else if (is_prefix(**argv, "pinned")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		NEXT_ARGP();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		path = **argv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		NEXT_ARGP();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		return open_obj_pinned_any(path, BPF_OBJ_LINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	p_err("expected 'id' or 'pinned', got: '%s'?", **argv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) show_link_header_json(struct bpf_link_info *info, json_writer_t *wtr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	jsonw_uint_field(wtr, "id", info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (info->type < ARRAY_SIZE(link_type_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		jsonw_string_field(wtr, "type", link_type_name[info->type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		jsonw_uint_field(wtr, "type", info->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	jsonw_uint_field(json_wtr, "prog_id", info->prog_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static void show_link_attach_type_json(__u32 attach_type, json_writer_t *wtr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (attach_type < ARRAY_SIZE(attach_type_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		jsonw_string_field(wtr, "attach_type",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				   attach_type_name[attach_type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		jsonw_uint_field(wtr, "attach_type", attach_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static bool is_iter_map_target(const char *target_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	return strcmp(target_name, "bpf_map_elem") == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	       strcmp(target_name, "bpf_sk_storage_map") == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static void show_iter_json(struct bpf_link_info *info, json_writer_t *wtr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	const char *target_name = u64_to_ptr(info->iter.target_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	jsonw_string_field(wtr, "target_name", target_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (is_iter_map_target(target_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		jsonw_uint_field(wtr, "map_id", info->iter.map.map_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static int get_prog_info(int prog_id, struct bpf_prog_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	__u32 len = sizeof(*info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int err, prog_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	prog_fd = bpf_prog_get_fd_by_id(prog_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (prog_fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		return prog_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	memset(info, 0, sizeof(*info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	err = bpf_obj_get_info_by_fd(prog_fd, info, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		p_err("can't get prog info: %s", strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	close(prog_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static int show_link_close_json(int fd, struct bpf_link_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	struct bpf_prog_info prog_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	jsonw_start_object(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	show_link_header_json(info, json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	switch (info->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	case BPF_LINK_TYPE_RAW_TRACEPOINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		jsonw_string_field(json_wtr, "tp_name",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 				   u64_to_ptr(info->raw_tracepoint.tp_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	case BPF_LINK_TYPE_TRACING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		err = get_prog_info(info->prog_id, &prog_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		if (prog_info.type < prog_type_name_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			jsonw_string_field(json_wtr, "prog_type",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 					   prog_type_name[prog_info.type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			jsonw_uint_field(json_wtr, "prog_type",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 					 prog_info.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		show_link_attach_type_json(info->tracing.attach_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 					   json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	case BPF_LINK_TYPE_CGROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		jsonw_lluint_field(json_wtr, "cgroup_id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 				   info->cgroup.cgroup_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		show_link_attach_type_json(info->cgroup.attach_type, json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	case BPF_LINK_TYPE_ITER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		show_iter_json(info, json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	case BPF_LINK_TYPE_NETNS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		jsonw_uint_field(json_wtr, "netns_ino",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				 info->netns.netns_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		show_link_attach_type_json(info->netns.attach_type, json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (!hash_empty(link_table.table)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		struct pinned_obj *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		jsonw_name(json_wtr, "pinned");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		jsonw_start_array(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		hash_for_each_possible(link_table.table, obj, hash, info->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			if (obj->id == info->id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 				jsonw_string(json_wtr, obj->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		jsonw_end_array(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	emit_obj_refs_json(&refs_table, info->id, json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	jsonw_end_object(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static void show_link_header_plain(struct bpf_link_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	printf("%u: ", info->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (info->type < ARRAY_SIZE(link_type_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		printf("%s  ", link_type_name[info->type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		printf("type %u  ", info->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	printf("prog %u  ", info->prog_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static void show_link_attach_type_plain(__u32 attach_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (attach_type < ARRAY_SIZE(attach_type_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		printf("attach_type %s  ", attach_type_name[attach_type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		printf("attach_type %u  ", attach_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void show_iter_plain(struct bpf_link_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	const char *target_name = u64_to_ptr(info->iter.target_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	printf("target_name %s  ", target_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (is_iter_map_target(target_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		printf("map_id %u  ", info->iter.map.map_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int show_link_close_plain(int fd, struct bpf_link_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	struct bpf_prog_info prog_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	show_link_header_plain(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	switch (info->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	case BPF_LINK_TYPE_RAW_TRACEPOINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		printf("\n\ttp '%s'  ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		       (const char *)u64_to_ptr(info->raw_tracepoint.tp_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	case BPF_LINK_TYPE_TRACING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		err = get_prog_info(info->prog_id, &prog_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		if (prog_info.type < prog_type_name_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			printf("\n\tprog_type %s  ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			       prog_type_name[prog_info.type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			printf("\n\tprog_type %u  ", prog_info.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		show_link_attach_type_plain(info->tracing.attach_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	case BPF_LINK_TYPE_CGROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		printf("\n\tcgroup_id %zu  ", (size_t)info->cgroup.cgroup_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		show_link_attach_type_plain(info->cgroup.attach_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	case BPF_LINK_TYPE_ITER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		show_iter_plain(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	case BPF_LINK_TYPE_NETNS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		printf("\n\tnetns_ino %u  ", info->netns.netns_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		show_link_attach_type_plain(info->netns.attach_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if (!hash_empty(link_table.table)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		struct pinned_obj *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		hash_for_each_possible(link_table.table, obj, hash, info->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			if (obj->id == info->id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				printf("\n\tpinned %s", obj->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	emit_obj_refs_plain(&refs_table, info->id, "\n\tpids ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static int do_show_link(int fd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct bpf_link_info info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	__u32 len = sizeof(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	char buf[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	memset(&info, 0, sizeof(info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	err = bpf_obj_get_info_by_fd(fd, &info, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		p_err("can't get link info: %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		      strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (info.type == BPF_LINK_TYPE_RAW_TRACEPOINT &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	    !info.raw_tracepoint.tp_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		info.raw_tracepoint.tp_name = (unsigned long)&buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		info.raw_tracepoint.tp_name_len = sizeof(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (info.type == BPF_LINK_TYPE_ITER &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	    !info.iter.target_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		info.iter.target_name = (unsigned long)&buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		info.iter.target_name_len = sizeof(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	if (json_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		show_link_close_json(fd, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		show_link_close_plain(fd, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static int do_show(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	__u32 id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	int err, fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (show_pinned)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		build_pinned_obj_table(&link_table, BPF_OBJ_LINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	build_obj_refs_table(&refs_table, BPF_OBJ_LINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	if (argc == 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		fd = link_parse_fd(&argc, &argv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		return do_show_link(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	if (argc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		return BAD_ARG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	if (json_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		jsonw_start_array(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	while (true) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		err = bpf_link_get_next_id(id, &id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			if (errno == ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 			p_err("can't get next link: %s%s", strerror(errno),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 			      errno == EINVAL ? " -- kernel too old?" : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		fd = bpf_link_get_fd_by_id(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			if (errno == ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 			p_err("can't get link by id (%u): %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 			      id, strerror(errno));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 			break;
^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) 		err = do_show_link(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (json_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		jsonw_end_array(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	delete_obj_refs_table(&refs_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	return errno == ENOENT ? 0 : -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static int do_pin(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	err = do_pin_any(argc, argv, link_parse_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	if (!err && json_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		jsonw_null(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static int do_detach(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	int err, fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	if (argc != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		p_err("link specifier is invalid or missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	fd = link_parse_fd(&argc, &argv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	err = bpf_link_detach(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		err = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		p_err("failed link detach: %s", strerror(-err));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	if (json_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		jsonw_null(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int do_help(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	if (json_output) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		jsonw_null(json_wtr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		"Usage: %1$s %2$s { show | list }   [LINK]\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		"       %1$s %2$s pin        LINK  FILE\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		"       %1$s %2$s detach     LINK\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		"       %1$s %2$s help\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		"\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		"       " HELP_SPEC_LINK "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		"       " HELP_SPEC_OPTIONS "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		"",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		bin_name, argv[-2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static const struct cmd cmds[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	{ "show",	do_show },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	{ "list",	do_show },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	{ "help",	do_help },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	{ "pin",	do_pin },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	{ "detach",	do_detach },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	{ 0 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) int do_link(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	return cmd_select(cmds, argc, argv, do_help);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }