88 static int register_uprobe_event(struct trace_uprobe *tu);
89 static int unregister_uprobe_event(struct trace_uprobe *tu);
92 	struct trace_uprobe	*tu;  member
212 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
271 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
273 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
278 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_is_busy()  local
280 	return trace_probe_is_enabled(&tu->tp);  in trace_uprobe_is_busy()
283 static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,  in trace_uprobe_match_command_head()  argument
292 	len = strlen(tu->filename);  in trace_uprobe_match_command_head()
293 	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')  in trace_uprobe_match_command_head()
296 	if (tu->ref_ctr_offset == 0)  in trace_uprobe_match_command_head()
298 				(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_match_command_head()
301 				(int)(sizeof(void *) * 2), tu->offset,  in trace_uprobe_match_command_head()
302 				tu->ref_ctr_offset);  in trace_uprobe_match_command_head()
308 	return trace_probe_match_command_args(&tu->tp, argc, argv);  in trace_uprobe_match_command_head()
314 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_match()  local
317 		strcmp(trace_probe_name(&tu->tp), event) == 0) &&  in trace_uprobe_match()
318 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
319 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
340 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
343 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
344 	if (!tu)  in alloc_trace_uprobe()
347 	ret = trace_probe_init(&tu->tp, event, group, true);  in alloc_trace_uprobe()
351 	dyn_event_init(&tu->devent, &trace_uprobe_ops);  in alloc_trace_uprobe()
352 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
354 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
355 	init_trace_uprobe_filter(tu->tp.event->filter);  in alloc_trace_uprobe()
356 	return tu;  in alloc_trace_uprobe()
359 	kfree(tu);  in alloc_trace_uprobe()
364 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
366 	if (!tu)  in free_trace_uprobe()
369 	path_put(&tu->path);  in free_trace_uprobe()
370 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
371 	kfree(tu->filename);  in free_trace_uprobe()
372 	kfree(tu);  in free_trace_uprobe()
378 	struct trace_uprobe *tu;  in find_probe_event()  local
380 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
381 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
382 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
383 			return tu;  in find_probe_event()
389 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
393 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
397 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
400 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
405 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
406 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
407 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
440 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
444 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
451 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
458 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
460 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
492 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
499 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
504 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
505 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
507 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
512 			ret = append_trace_uprobe(tu, old_tu);  in register_trace_uprobe()
517 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
527 	dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in register_trace_uprobe()
541 	struct trace_uprobe *tu;  in __trace_uprobe_create()  local
678 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in __trace_uprobe_create()
679 	if (IS_ERR(tu)) {  in __trace_uprobe_create()
680 		ret = PTR_ERR(tu);  in __trace_uprobe_create()
685 	tu->offset = offset;  in __trace_uprobe_create()
686 	tu->ref_ctr_offset = ref_ctr_offset;  in __trace_uprobe_create()
687 	tu->path = path;  in __trace_uprobe_create()
688 	tu->filename = filename;  in __trace_uprobe_create()
693 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i],  in __trace_uprobe_create()
699 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in __trace_uprobe_create()
700 	ret = traceprobe_set_print_fmt(&tu->tp, ptype);  in __trace_uprobe_create()
704 	ret = register_trace_uprobe(tu);  in __trace_uprobe_create()
709 	free_trace_uprobe(tu);  in __trace_uprobe_create()
740 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_release()  local
742 	return unregister_trace_uprobe(tu);  in trace_uprobe_release()
748 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_show()  local
749 	char c = is_ret_probe(tu) ? 'r' : 'p';  in trace_uprobe_show()
752 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp),  in trace_uprobe_show()
753 			trace_probe_name(&tu->tp), tu->filename,  in trace_uprobe_show()
754 			(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_show()
756 	if (tu->ref_ctr_offset)  in trace_uprobe_show()
757 		seq_printf(m, "(0x%lx)", tu->ref_ctr_offset);  in trace_uprobe_show()
759 	for (i = 0; i < tu->tp.nr_args; i++)  in trace_uprobe_show()
760 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in trace_uprobe_show()
820 	struct trace_uprobe *tu;  in probes_profile_seq_show()  local
825 	tu = to_trace_uprobe(ev);  in probes_profile_seq_show()
826 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
827 			trace_probe_name(&tu->tp), tu->nhit);  in probes_profile_seq_show()
949 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
958 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
962 	if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))  in __uprobe_trace_func()
968 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
969 	size = esize + tu->tp.size + dsize;  in __uprobe_trace_func()
974 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
983 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_trace_func()
989 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
994 	if (is_ret_probe(tu))  in uprobe_trace_func()
998 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uprobe_trace_func()
999 		__uprobe_trace_func(tu, 0, regs, ucb, dsize, link->file);  in uprobe_trace_func()
1005 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
1012 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uretprobe_trace_func()
1013 		__uprobe_trace_func(tu, func, regs, ucb, dsize, link->file);  in uretprobe_trace_func()
1023 	struct trace_uprobe *tu;  in print_uprobe_event()  local
1027 	tu = trace_uprobe_primary_from_call(  in print_uprobe_event()
1029 	if (unlikely(!tu))  in print_uprobe_event()
1032 	if (is_ret_probe(tu)) {  in print_uprobe_event()
1034 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1039 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1044 	if (print_probe_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0)  in print_uprobe_event()
1057 static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)  in trace_uprobe_enable()  argument
1061 	tu->consumer.filter = filter;  in trace_uprobe_enable()
1062 	tu->inode = d_real_inode(tu->path.dentry);  in trace_uprobe_enable()
1064 	if (tu->ref_ctr_offset)  in trace_uprobe_enable()
1065 		ret = uprobe_register_refctr(tu->inode, tu->offset,  in trace_uprobe_enable()
1066 				tu->ref_ctr_offset, &tu->consumer);  in trace_uprobe_enable()
1068 		ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);  in trace_uprobe_enable()
1071 		tu->inode = NULL;  in trace_uprobe_enable()
1078 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1080 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1081 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1083 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in __probe_event_disable()
1084 		if (!tu->inode)  in __probe_event_disable()
1087 		uprobe_unregister(tu->inode, tu->offset, &tu->consumer);  in __probe_event_disable()
1088 		tu->inode = NULL;  in __probe_event_disable()
1096 	struct trace_uprobe *tu;  in probe_event_enable()  local
1120 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1121 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1130 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in probe_event_enable()
1131 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1181 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1183 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1184 	if (unlikely(!tu))  in uprobe_event_define_fields()
1187 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1196 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1276 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1283 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1284 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1287 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_close()
1288 		ret = uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);  in uprobe_perf_close()
1300 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1307 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1308 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1311 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_open()
1312 		err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);  in uprobe_perf_open()
1326 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1329 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1330 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1339 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1343 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1360 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1362 	size = esize + tu->tp.size + dsize;  in __uprobe_perf_func()
1376 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1385 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_perf_func()
1387 	if (size - esize > tu->tp.size + dsize) {  in __uprobe_perf_func()
1388 		int len = tu->tp.size + dsize;  in __uprobe_perf_func()
1400 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1403 	if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))  in uprobe_perf_func()
1406 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1407 		__uprobe_perf_func(tu, 0, regs, ucb, dsize);  in uprobe_perf_func()
1411 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1415 	__uprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_perf_func()
1424 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1427 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1429 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1430 	if (!tu)  in bpf_get_uprobe_info()
1433 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1435 	*filename = tu->filename;  in bpf_get_uprobe_info()
1436 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1477 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1484 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1485 	tu->nhit++;  in uprobe_dispatcher()
1487 	udd.tu = tu;  in uprobe_dispatcher()
1495 	dsize = __get_data_size(&tu->tp, regs);  in uprobe_dispatcher()
1496 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uprobe_dispatcher()
1499 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uprobe_dispatcher()
1501 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uprobe_dispatcher()
1502 		ret |= uprobe_trace_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1505 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uprobe_dispatcher()
1506 		ret |= uprobe_perf_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1515 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1520 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1522 	udd.tu = tu;  in uretprobe_dispatcher()
1530 	dsize = __get_data_size(&tu->tp, regs);  in uretprobe_dispatcher()
1531 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uretprobe_dispatcher()
1534 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uretprobe_dispatcher()
1536 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uretprobe_dispatcher()
1537 		uretprobe_trace_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1540 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uretprobe_dispatcher()
1541 		uretprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1557 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1559 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1567 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1569 	init_trace_event_call(tu);  in register_uprobe_event()
1571 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1574 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1576 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1585 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1603 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1606 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1608 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1610 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1613 	tu->offset = offs;  in create_local_trace_uprobe()
1614 	tu->path = path;  in create_local_trace_uprobe()
1615 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1616 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1617 	if (!tu->filename) {  in create_local_trace_uprobe()
1622 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1624 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1625 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1630 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1632 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1638 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1640 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1642 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()