91 static int register_uprobe_event(struct trace_uprobe *tu);
92 static int unregister_uprobe_event(struct trace_uprobe *tu);
213 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
269 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
271 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
276 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_is_busy()  local
278 	return trace_probe_is_enabled(&tu->tp);  in trace_uprobe_is_busy()
281 static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,  in trace_uprobe_match_command_head()  argument
290 	len = strlen(tu->filename);  in trace_uprobe_match_command_head()
291 	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')  in trace_uprobe_match_command_head()
294 	if (tu->ref_ctr_offset == 0)  in trace_uprobe_match_command_head()
296 				(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_match_command_head()
299 				(int)(sizeof(void *) * 2), tu->offset,  in trace_uprobe_match_command_head()
300 				tu->ref_ctr_offset);  in trace_uprobe_match_command_head()
306 	return trace_probe_match_command_args(&tu->tp, argc, argv);  in trace_uprobe_match_command_head()
312 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_match()  local
315 		strcmp(trace_probe_name(&tu->tp), event) == 0) &&  in trace_uprobe_match()
316 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
317 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
338 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
341 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
342 	if (!tu)  in alloc_trace_uprobe()
345 	tu->nhits = alloc_percpu(unsigned long);  in alloc_trace_uprobe()
346 	if (!tu->nhits) {  in alloc_trace_uprobe()
351 	ret = trace_probe_init(&tu->tp, event, group, true, nargs);  in alloc_trace_uprobe()
355 	dyn_event_init(&tu->devent, &trace_uprobe_ops);  in alloc_trace_uprobe()
356 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
358 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
359 	init_trace_uprobe_filter(tu->tp.event->filter);  in alloc_trace_uprobe()
360 	return tu;  in alloc_trace_uprobe()
363 	free_percpu(tu->nhits);  in alloc_trace_uprobe()
364 	kfree(tu);  in alloc_trace_uprobe()
369 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
371 	if (!tu)  in free_trace_uprobe()
374 	path_put(&tu->path);  in free_trace_uprobe()
375 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
376 	kfree(tu->filename);  in free_trace_uprobe()
377 	free_percpu(tu->nhits);  in free_trace_uprobe()
378 	kfree(tu);  in free_trace_uprobe()
384 	struct trace_uprobe *tu;  in find_probe_event()  local
386 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
387 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
388 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
389 			return tu;  in find_probe_event()
395 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
399 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
403 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
406 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
411 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
412 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
413 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
446 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
450 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
457 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
464 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
466 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
498 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
505 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
510 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
511 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
513 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
518 		return append_trace_uprobe(tu, old_tu);  in register_trace_uprobe()
521 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
531 	dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in register_trace_uprobe()
545 	struct trace_uprobe *tu __free(free_trace_uprobe) = NULL;  in DEFINE_FREE()
688 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in DEFINE_FREE()
689 	if (IS_ERR(tu)) {  in DEFINE_FREE()
690 		ret = PTR_ERR(tu);  in DEFINE_FREE()
695 	tu->offset = offset;  in DEFINE_FREE()
696 	tu->ref_ctr_offset = ref_ctr_offset;  in DEFINE_FREE()
697 	tu->path = path;  in DEFINE_FREE()
700 	tu->filename = no_free_ptr(filename);  in DEFINE_FREE()
710 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i], ctx);  in DEFINE_FREE()
715 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in DEFINE_FREE()
716 	ret = traceprobe_set_print_fmt(&tu->tp, ptype);  in DEFINE_FREE()
720 	ret = register_trace_uprobe(tu);  in DEFINE_FREE()
722 		tu = NULL;  in DEFINE_FREE()
745 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_release()  local
747 	return unregister_trace_uprobe(tu);  in trace_uprobe_release()
753 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_show()  local
754 	char c = is_ret_probe(tu) ? 'r' : 'p';  in trace_uprobe_show()
757 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp),  in trace_uprobe_show()
758 			trace_probe_name(&tu->tp), tu->filename,  in trace_uprobe_show()
759 			(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_show()
761 	if (tu->ref_ctr_offset)  in trace_uprobe_show()
762 		seq_printf(m, "(0x%lx)", tu->ref_ctr_offset);  in trace_uprobe_show()
764 	for (i = 0; i < tu->tp.nr_args; i++)  in trace_uprobe_show()
765 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in trace_uprobe_show()
825 	struct trace_uprobe *tu;  in probes_profile_seq_show()  local
832 	tu = to_trace_uprobe(ev);  in probes_profile_seq_show()
836 		nhits += per_cpu(*tu->nhits, cpu);  in probes_profile_seq_show()
839 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
840 		   trace_probe_name(&tu->tp), nhits);  in probes_profile_seq_show()
966 static struct uprobe_cpu_buffer *prepare_uprobe_buffer(struct trace_uprobe *tu,  in prepare_uprobe_buffer()  argument
976 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in prepare_uprobe_buffer()
977 	dsize = __get_data_size(&tu->tp, regs, NULL);  in prepare_uprobe_buffer()
980 	ucb->dsize = tu->tp.size + dsize;  in prepare_uprobe_buffer()
984 		dsize = MAX_UCB_BUFFER_SIZE - tu->tp.size;  in prepare_uprobe_buffer()
987 	store_trace_args(ucb->buf, &tu->tp, regs, NULL, esize, dsize);  in prepare_uprobe_buffer()
993 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
1002 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
1009 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
1015 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
1030 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
1036 	if (is_ret_probe(tu))  in uprobe_trace_func()
1039 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uprobe_trace_func()
1042 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uprobe_trace_func()
1043 		__uprobe_trace_func(tu, 0, regs, ucb, link->file);  in uprobe_trace_func()
1049 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
1056 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uretprobe_trace_func()
1059 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uretprobe_trace_func()
1060 		__uprobe_trace_func(tu, func, regs, ucb, link->file);  in uretprobe_trace_func()
1070 	struct trace_uprobe *tu;  in print_uprobe_event()  local
1074 	tu = trace_uprobe_primary_from_call(  in print_uprobe_event()
1076 	if (unlikely(!tu))  in print_uprobe_event()
1079 	if (is_ret_probe(tu)) {  in print_uprobe_event()
1081 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1086 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1091 	if (trace_probe_print_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0)  in print_uprobe_event()
1102 static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)  in trace_uprobe_enable()  argument
1104 	struct inode *inode = d_real_inode(tu->path.dentry);  in trace_uprobe_enable()
1107 	tu->consumer.filter = filter;  in trace_uprobe_enable()
1108 	uprobe = uprobe_register(inode, tu->offset, tu->ref_ctr_offset, &tu->consumer);  in trace_uprobe_enable()
1112 	tu->uprobe = uprobe;  in trace_uprobe_enable()
1118 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1121 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1122 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1124 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in __probe_event_disable()
1125 		if (!tu->uprobe)  in __probe_event_disable()
1128 		uprobe_unregister_nosync(tu->uprobe, &tu->consumer);  in __probe_event_disable()
1130 		tu->uprobe = NULL;  in __probe_event_disable()
1140 	struct trace_uprobe *tu;  in probe_event_enable()  local
1164 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1165 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1174 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in probe_event_enable()
1175 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1225 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1227 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1228 	if (unlikely(!tu))  in uprobe_event_define_fields()
1231 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1240 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1317 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1324 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1325 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1328 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_close()
1329 		ret = uprobe_apply(tu->uprobe, &tu->consumer, false);  in uprobe_perf_close()
1341 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1348 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1349 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1352 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_open()
1353 		err = uprobe_apply(tu->uprobe, &tu->consumer, true);  in uprobe_perf_open()
1366 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1369 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1370 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1386 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1390 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1412 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1414 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in __uprobe_perf_func()
1429 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1450 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1453 	if (!uprobe_perf_filter(&tu->consumer, current->mm))  in uprobe_perf_func()
1456 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1457 		__uprobe_perf_func(tu, 0, regs, ucbp);  in uprobe_perf_func()
1461 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1465 	__uprobe_perf_func(tu, func, regs, ucbp);  in uretprobe_perf_func()
1474 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1477 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1479 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1480 	if (!tu)  in bpf_get_uprobe_info()
1483 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1485 	*filename = tu->filename;  in bpf_get_uprobe_info()
1486 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1487 	*probe_addr = tu->ref_ctr_offset;  in bpf_get_uprobe_info()
1529 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1535 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1537 	this_cpu_inc(*tu->nhits);  in uprobe_dispatcher()
1539 	udd.tu = tu;  in uprobe_dispatcher()
1547 	flags = trace_probe_load_flag(&tu->tp);  in uprobe_dispatcher()
1549 		ret |= uprobe_trace_func(tu, regs, &ucb);  in uprobe_dispatcher()
1553 		ret |= uprobe_perf_func(tu, regs, &ucb);  in uprobe_dispatcher()
1563 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1568 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1570 	udd.tu = tu;  in uretprobe_dispatcher()
1578 	flags = trace_probe_load_flag(&tu->tp);  in uretprobe_dispatcher()
1580 		uretprobe_trace_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1584 		uretprobe_perf_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1600 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1602 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1610 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1612 	init_trace_event_call(tu);  in register_uprobe_event()
1614 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1617 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1619 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1628 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1646 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1649 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1651 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1653 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1656 	tu->offset = offs;  in create_local_trace_uprobe()
1657 	tu->path = path;  in create_local_trace_uprobe()
1658 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1659 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1660 	if (!tu->filename) {  in create_local_trace_uprobe()
1665 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1667 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1668 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1673 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1675 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1681 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1683 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1685 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()