86 static int register_uprobe_event(struct trace_uprobe *tu);
87 static int unregister_uprobe_event(struct trace_uprobe *tu);
90 	struct trace_uprobe	*tu;  member
210 	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
314 	return strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in trace_uprobe_match()
315 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
316 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
337 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
340 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
341 	if (!tu)  in alloc_trace_uprobe()
344 	ret = trace_probe_init(&tu->tp, event, group, true);  in alloc_trace_uprobe()
348 	dyn_event_init(&tu->devent, &trace_uprobe_ops);  in alloc_trace_uprobe()
349 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
351 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
352 	init_trace_uprobe_filter(tu->tp.event->filter);  in alloc_trace_uprobe()
353 	return tu;  in alloc_trace_uprobe()
356 	kfree(tu);  in alloc_trace_uprobe()
361 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
363 	if (!tu)  in free_trace_uprobe()
366 	path_put(&tu->path);  in free_trace_uprobe()
367 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
368 	kfree(tu->filename);  in free_trace_uprobe()
369 	kfree(tu);  in free_trace_uprobe()
375 	struct trace_uprobe *tu;  in find_probe_event()  local
377 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
378 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
379 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
380 			return tu;  in find_probe_event()
386 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
390 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
394 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
397 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
402 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
403 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
404 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
439 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
443 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
450 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
457 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
459 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
491 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
498 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
503 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
504 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
506 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
511 			ret = append_trace_uprobe(tu, old_tu);  in register_trace_uprobe()
516 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
526 	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
675 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in __trace_uprobe_create()
676 	if (IS_ERR(tu)) {  in __trace_uprobe_create()
677 		ret = PTR_ERR(tu);  in __trace_uprobe_create()
682 	tu->offset = offset;  in __trace_uprobe_create()
683 	tu->ref_ctr_offset = ref_ctr_offset;  in __trace_uprobe_create()
684 	tu->path = path;  in __trace_uprobe_create()
685 	tu->filename = filename;  in __trace_uprobe_create()
690 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i],  in __trace_uprobe_create()
696 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in __trace_uprobe_create()
697 	ret = traceprobe_set_print_fmt(&tu->tp, ptype);  in __trace_uprobe_create()
701 	ret = register_trace_uprobe(tu);  in __trace_uprobe_create()
706 	free_trace_uprobe(tu);  in __trace_uprobe_create()
737 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_release()  local
739 	return unregister_trace_uprobe(tu);  in trace_uprobe_release()
745 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_show()  local
746 	char c = is_ret_probe(tu) ? 'r' : 'p';  in trace_uprobe_show()
749 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp),  in trace_uprobe_show()
750 			trace_probe_name(&tu->tp), tu->filename,  in trace_uprobe_show()
751 			(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_show()
753 	if (tu->ref_ctr_offset)  in trace_uprobe_show()
754 		seq_printf(m, "(0x%lx)", tu->ref_ctr_offset);  in trace_uprobe_show()
756 	for (i = 0; i < tu->tp.nr_args; i++)  in trace_uprobe_show()
757 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in trace_uprobe_show()
817 	struct trace_uprobe *tu;  in probes_profile_seq_show()  local
822 	tu = to_trace_uprobe(ev);  in probes_profile_seq_show()
823 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
824 			trace_probe_name(&tu->tp), tu->nhit);  in probes_profile_seq_show()
946 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
956 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
960 	if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))  in __uprobe_trace_func()
966 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
967 	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()
1079 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1081 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1082 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1085 		tu = container_of(pos, struct trace_uprobe, tp);  in __probe_event_disable()
1086 		if (!tu->inode)  in __probe_event_disable()
1089 		uprobe_unregister(tu->inode, tu->offset, &tu->consumer);  in __probe_event_disable()
1090 		tu->inode = NULL;  in __probe_event_disable()
1098 	struct trace_uprobe *tu;  in probe_event_enable()  local
1122 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1123 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1133 		tu = container_of(pos, struct trace_uprobe, tp);  in probe_event_enable()
1134 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1184 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1186 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1187 	if (unlikely(!tu))  in uprobe_event_define_fields()
1190 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1199 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1279 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1286 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1287 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1291 		tu = container_of(pos, struct trace_uprobe, tp);  in uprobe_perf_close()
1292 		ret = uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);  in uprobe_perf_close()
1304 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1311 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1312 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1316 		err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);  in uprobe_perf_open()
1330 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1333 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1334 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1343 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1347 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1364 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1366 	size = esize + tu->tp.size + dsize;  in __uprobe_perf_func()
1380 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1389 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_perf_func()
1391 	if (size - esize > tu->tp.size + dsize) {  in __uprobe_perf_func()
1392 		int len = tu->tp.size + dsize;  in __uprobe_perf_func()
1404 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1407 	if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))  in uprobe_perf_func()
1410 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1411 		__uprobe_perf_func(tu, 0, regs, ucb, dsize);  in uprobe_perf_func()
1415 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1419 	__uprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_perf_func()
1428 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1431 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1433 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1434 	if (!tu)  in bpf_get_uprobe_info()
1437 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1439 	*filename = tu->filename;  in bpf_get_uprobe_info()
1440 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1481 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1488 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1489 	tu->nhit++;  in uprobe_dispatcher()
1491 	udd.tu = tu;  in uprobe_dispatcher()
1499 	dsize = __get_data_size(&tu->tp, regs);  in uprobe_dispatcher()
1500 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uprobe_dispatcher()
1503 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uprobe_dispatcher()
1505 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uprobe_dispatcher()
1506 		ret |= uprobe_trace_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1509 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uprobe_dispatcher()
1510 		ret |= uprobe_perf_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1519 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1524 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1526 	udd.tu = tu;  in uretprobe_dispatcher()
1534 	dsize = __get_data_size(&tu->tp, regs);  in uretprobe_dispatcher()
1535 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uretprobe_dispatcher()
1538 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uretprobe_dispatcher()
1540 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uretprobe_dispatcher()
1541 		uretprobe_trace_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1544 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uretprobe_dispatcher()
1545 		uretprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1561 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1563 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1571 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1573 	init_trace_event_call(tu);  in register_uprobe_event()
1575 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1578 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1580 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1589 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1607 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1610 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1612 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1614 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1617 	tu->offset = offs;  in create_local_trace_uprobe()
1618 	tu->path = path;  in create_local_trace_uprobe()
1619 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1620 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1621 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1623 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1624 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1629 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1631 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1637 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1639 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1641 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()