89 static int register_uprobe_event(struct trace_uprobe *tu);
90 static int unregister_uprobe_event(struct trace_uprobe *tu);
211 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
267 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
269 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
274 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_is_busy()  local
276 	return trace_probe_is_enabled(&tu->tp);  in trace_uprobe_is_busy()
279 static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,  in trace_uprobe_match_command_head()  argument
288 	len = strlen(tu->filename);  in trace_uprobe_match_command_head()
289 	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')  in trace_uprobe_match_command_head()
292 	if (tu->ref_ctr_offset == 0)  in trace_uprobe_match_command_head()
294 				(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_match_command_head()
297 				(int)(sizeof(void *) * 2), tu->offset,  in trace_uprobe_match_command_head()
298 				tu->ref_ctr_offset);  in trace_uprobe_match_command_head()
304 	return trace_probe_match_command_args(&tu->tp, argc, argv);  in trace_uprobe_match_command_head()
310 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_match()  local
313 		strcmp(trace_probe_name(&tu->tp), event) == 0) &&  in trace_uprobe_match()
314 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
315 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
336 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
339 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
340 	if (!tu)  in alloc_trace_uprobe()
343 	tu->nhits = alloc_percpu(unsigned long);  in alloc_trace_uprobe()
344 	if (!tu->nhits) {  in alloc_trace_uprobe()
349 	ret = trace_probe_init(&tu->tp, event, group, true, nargs);  in alloc_trace_uprobe()
353 	dyn_event_init(&tu->devent, &trace_uprobe_ops);  in alloc_trace_uprobe()
354 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
356 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
357 	init_trace_uprobe_filter(tu->tp.event->filter);  in alloc_trace_uprobe()
358 	return tu;  in alloc_trace_uprobe()
361 	free_percpu(tu->nhits);  in alloc_trace_uprobe()
362 	kfree(tu);  in alloc_trace_uprobe()
367 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
369 	if (!tu)  in free_trace_uprobe()
372 	path_put(&tu->path);  in free_trace_uprobe()
373 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
374 	kfree(tu->filename);  in free_trace_uprobe()
375 	free_percpu(tu->nhits);  in free_trace_uprobe()
376 	kfree(tu);  in free_trace_uprobe()
382 	struct trace_uprobe *tu;  in find_probe_event()  local
384 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
385 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
386 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
387 			return tu;  in find_probe_event()
393 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
397 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
401 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
404 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
409 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
410 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
411 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
444 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
448 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
455 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
462 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
464 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
496 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
503 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
508 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
509 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
511 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
516 		return append_trace_uprobe(tu, old_tu);  in register_trace_uprobe()
519 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
529 	dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in register_trace_uprobe()
540 	struct trace_uprobe *tu;  in __trace_uprobe_create()  local
684 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in __trace_uprobe_create()
685 	if (IS_ERR(tu)) {  in __trace_uprobe_create()
686 		ret = PTR_ERR(tu);  in __trace_uprobe_create()
691 	tu->offset = offset;  in __trace_uprobe_create()
692 	tu->ref_ctr_offset = ref_ctr_offset;  in __trace_uprobe_create()
693 	tu->path = path;  in __trace_uprobe_create()
694 	tu->filename = filename;  in __trace_uprobe_create()
703 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i], &ctx);  in __trace_uprobe_create()
709 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in __trace_uprobe_create()
710 	ret = traceprobe_set_print_fmt(&tu->tp, ptype);  in __trace_uprobe_create()
714 	ret = register_trace_uprobe(tu);  in __trace_uprobe_create()
719 	free_trace_uprobe(tu);  in __trace_uprobe_create()
750 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_release()  local
752 	return unregister_trace_uprobe(tu);  in trace_uprobe_release()
758 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_show()  local
759 	char c = is_ret_probe(tu) ? 'r' : 'p';  in trace_uprobe_show()
762 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp),  in trace_uprobe_show()
763 			trace_probe_name(&tu->tp), tu->filename,  in trace_uprobe_show()
764 			(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_show()
766 	if (tu->ref_ctr_offset)  in trace_uprobe_show()
767 		seq_printf(m, "(0x%lx)", tu->ref_ctr_offset);  in trace_uprobe_show()
769 	for (i = 0; i < tu->tp.nr_args; i++)  in trace_uprobe_show()
770 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in trace_uprobe_show()
830 	struct trace_uprobe *tu;  in probes_profile_seq_show()  local
837 	tu = to_trace_uprobe(ev);  in probes_profile_seq_show()
841 		nhits += per_cpu(*tu->nhits, cpu);  in probes_profile_seq_show()
844 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
845 		   trace_probe_name(&tu->tp), nhits);  in probes_profile_seq_show()
971 static struct uprobe_cpu_buffer *prepare_uprobe_buffer(struct trace_uprobe *tu,  in prepare_uprobe_buffer()  argument
981 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in prepare_uprobe_buffer()
982 	dsize = __get_data_size(&tu->tp, regs, NULL);  in prepare_uprobe_buffer()
985 	ucb->dsize = tu->tp.size + dsize;  in prepare_uprobe_buffer()
989 		dsize = MAX_UCB_BUFFER_SIZE - tu->tp.size;  in prepare_uprobe_buffer()
992 	store_trace_args(ucb->buf, &tu->tp, regs, NULL, esize, dsize);  in prepare_uprobe_buffer()
998 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
1007 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
1014 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
1020 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
1035 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
1041 	if (is_ret_probe(tu))  in uprobe_trace_func()
1044 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uprobe_trace_func()
1047 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uprobe_trace_func()
1048 		__uprobe_trace_func(tu, 0, regs, ucb, link->file);  in uprobe_trace_func()
1054 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
1061 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uretprobe_trace_func()
1064 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uretprobe_trace_func()
1065 		__uprobe_trace_func(tu, func, regs, ucb, link->file);  in uretprobe_trace_func()
1075 	struct trace_uprobe *tu;  in print_uprobe_event()  local
1079 	tu = trace_uprobe_primary_from_call(  in print_uprobe_event()
1081 	if (unlikely(!tu))  in print_uprobe_event()
1084 	if (is_ret_probe(tu)) {  in print_uprobe_event()
1086 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1091 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1096 	if (trace_probe_print_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0)  in print_uprobe_event()
1107 static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)  in trace_uprobe_enable()  argument
1109 	struct inode *inode = d_real_inode(tu->path.dentry);  in trace_uprobe_enable()
1112 	tu->consumer.filter = filter;  in trace_uprobe_enable()
1113 	uprobe = uprobe_register(inode, tu->offset, tu->ref_ctr_offset, &tu->consumer);  in trace_uprobe_enable()
1117 	tu->uprobe = uprobe;  in trace_uprobe_enable()
1123 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1126 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1127 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1129 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in __probe_event_disable()
1130 		if (!tu->uprobe)  in __probe_event_disable()
1133 		uprobe_unregister_nosync(tu->uprobe, &tu->consumer);  in __probe_event_disable()
1135 		tu->uprobe = NULL;  in __probe_event_disable()
1145 	struct trace_uprobe *tu;  in probe_event_enable()  local
1169 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1170 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1179 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in probe_event_enable()
1180 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1230 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1232 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1233 	if (unlikely(!tu))  in uprobe_event_define_fields()
1236 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1245 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1322 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1329 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1330 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1333 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_close()
1334 		ret = uprobe_apply(tu->uprobe, &tu->consumer, false);  in uprobe_perf_close()
1346 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1353 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1354 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1357 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_open()
1358 		err = uprobe_apply(tu->uprobe, &tu->consumer, true);  in uprobe_perf_open()
1371 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1374 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1375 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1391 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1395 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1417 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1419 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in __uprobe_perf_func()
1434 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1455 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1458 	if (!uprobe_perf_filter(&tu->consumer, current->mm))  in uprobe_perf_func()
1461 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1462 		__uprobe_perf_func(tu, 0, regs, ucbp);  in uprobe_perf_func()
1466 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1470 	__uprobe_perf_func(tu, func, regs, ucbp);  in uretprobe_perf_func()
1479 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1482 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1484 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1485 	if (!tu)  in bpf_get_uprobe_info()
1488 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1490 	*filename = tu->filename;  in bpf_get_uprobe_info()
1491 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1534 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1539 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1541 	this_cpu_inc(*tu->nhits);  in uprobe_dispatcher()
1543 	udd.tu = tu;  in uprobe_dispatcher()
1551 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uprobe_dispatcher()
1552 		ret |= uprobe_trace_func(tu, regs, &ucb);  in uprobe_dispatcher()
1555 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uprobe_dispatcher()
1556 		ret |= uprobe_perf_func(tu, regs, &ucb);  in uprobe_dispatcher()
1566 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1570 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1572 	udd.tu = tu;  in uretprobe_dispatcher()
1580 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uretprobe_dispatcher()
1581 		uretprobe_trace_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1584 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uretprobe_dispatcher()
1585 		uretprobe_perf_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1601 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1603 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1611 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1613 	init_trace_event_call(tu);  in register_uprobe_event()
1615 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1618 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1620 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1629 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1647 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1650 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1652 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1654 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1657 	tu->offset = offs;  in create_local_trace_uprobe()
1658 	tu->path = path;  in create_local_trace_uprobe()
1659 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1660 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1661 	if (!tu->filename) {  in create_local_trace_uprobe()
1666 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1668 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1669 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1674 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1676 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1682 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1684 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1686 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()