88 static int register_uprobe_event(struct trace_uprobe *tu);
89 static int unregister_uprobe_event(struct trace_uprobe *tu);
208 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
264 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
266 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
271 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_is_busy()  local
273 	return trace_probe_is_enabled(&tu->tp);  in trace_uprobe_is_busy()
276 static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,  in trace_uprobe_match_command_head()  argument
285 	len = strlen(tu->filename);  in trace_uprobe_match_command_head()
286 	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')  in trace_uprobe_match_command_head()
289 	if (tu->ref_ctr_offset == 0)  in trace_uprobe_match_command_head()
291 				(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_match_command_head()
294 				(int)(sizeof(void *) * 2), tu->offset,  in trace_uprobe_match_command_head()
295 				tu->ref_ctr_offset);  in trace_uprobe_match_command_head()
301 	return trace_probe_match_command_args(&tu->tp, argc, argv);  in trace_uprobe_match_command_head()
307 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_match()  local
310 		strcmp(trace_probe_name(&tu->tp), event) == 0) &&  in trace_uprobe_match()
311 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
312 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
333 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
336 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
337 	if (!tu)  in alloc_trace_uprobe()
340 	ret = trace_probe_init(&tu->tp, event, group, true);  in alloc_trace_uprobe()
344 	dyn_event_init(&tu->devent, &trace_uprobe_ops);  in alloc_trace_uprobe()
345 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
347 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
348 	init_trace_uprobe_filter(tu->tp.event->filter);  in alloc_trace_uprobe()
349 	return tu;  in alloc_trace_uprobe()
352 	kfree(tu);  in alloc_trace_uprobe()
357 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
359 	if (!tu)  in free_trace_uprobe()
362 	path_put(&tu->path);  in free_trace_uprobe()
363 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
364 	kfree(tu->filename);  in free_trace_uprobe()
365 	kfree(tu);  in free_trace_uprobe()
371 	struct trace_uprobe *tu;  in find_probe_event()  local
373 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
374 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
375 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
376 			return tu;  in find_probe_event()
382 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
386 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
390 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
393 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
398 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
399 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
400 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
433 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
437 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
444 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
451 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
453 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
485 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
492 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
497 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
498 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
500 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
505 			ret = append_trace_uprobe(tu, old_tu);  in register_trace_uprobe()
510 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
520 	dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in register_trace_uprobe()
534 	struct trace_uprobe *tu;  in __trace_uprobe_create()  local
671 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in __trace_uprobe_create()
672 	if (IS_ERR(tu)) {  in __trace_uprobe_create()
673 		ret = PTR_ERR(tu);  in __trace_uprobe_create()
678 	tu->offset = offset;  in __trace_uprobe_create()
679 	tu->ref_ctr_offset = ref_ctr_offset;  in __trace_uprobe_create()
680 	tu->path = path;  in __trace_uprobe_create()
681 	tu->filename = filename;  in __trace_uprobe_create()
690 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i], &ctx);  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
955 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
959 	if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))  in __uprobe_trace_func()
965 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
966 	size = esize + tu->tp.size + dsize;  in __uprobe_trace_func()
971 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
980 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_trace_func()
986 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
991 	if (is_ret_probe(tu))  in uprobe_trace_func()
995 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uprobe_trace_func()
996 		__uprobe_trace_func(tu, 0, regs, ucb, dsize, link->file);  in uprobe_trace_func()
1002 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
1009 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uretprobe_trace_func()
1010 		__uprobe_trace_func(tu, func, regs, ucb, dsize, link->file);  in uretprobe_trace_func()
1020 	struct trace_uprobe *tu;  in print_uprobe_event()  local
1024 	tu = trace_uprobe_primary_from_call(  in print_uprobe_event()
1026 	if (unlikely(!tu))  in print_uprobe_event()
1029 	if (is_ret_probe(tu)) {  in print_uprobe_event()
1031 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1036 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1041 	if (trace_probe_print_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0)  in print_uprobe_event()
1054 static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)  in trace_uprobe_enable()  argument
1058 	tu->consumer.filter = filter;  in trace_uprobe_enable()
1059 	tu->inode = d_real_inode(tu->path.dentry);  in trace_uprobe_enable()
1061 	if (tu->ref_ctr_offset)  in trace_uprobe_enable()
1062 		ret = uprobe_register_refctr(tu->inode, tu->offset,  in trace_uprobe_enable()
1063 				tu->ref_ctr_offset, &tu->consumer);  in trace_uprobe_enable()
1065 		ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);  in trace_uprobe_enable()
1068 		tu->inode = NULL;  in trace_uprobe_enable()
1075 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1077 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1078 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1080 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in __probe_event_disable()
1081 		if (!tu->inode)  in __probe_event_disable()
1084 		uprobe_unregister(tu->inode, tu->offset, &tu->consumer);  in __probe_event_disable()
1085 		tu->inode = NULL;  in __probe_event_disable()
1093 	struct trace_uprobe *tu;  in probe_event_enable()  local
1117 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1118 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1127 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in probe_event_enable()
1128 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1178 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1180 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1181 	if (unlikely(!tu))  in uprobe_event_define_fields()
1184 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1193 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1273 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1280 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1281 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1284 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_close()
1285 		ret = uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);  in uprobe_perf_close()
1297 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1304 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1305 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1308 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_open()
1309 		err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);  in uprobe_perf_open()
1323 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1326 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1327 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1336 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1340 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1357 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1359 	size = esize + tu->tp.size + dsize;  in __uprobe_perf_func()
1373 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1382 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_perf_func()
1384 	if (size - esize > tu->tp.size + dsize) {  in __uprobe_perf_func()
1385 		int len = tu->tp.size + dsize;  in __uprobe_perf_func()
1397 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1400 	if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))  in uprobe_perf_func()
1403 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1404 		__uprobe_perf_func(tu, 0, regs, ucb, dsize);  in uprobe_perf_func()
1408 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1412 	__uprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_perf_func()
1421 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1424 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1426 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1427 	if (!tu)  in bpf_get_uprobe_info()
1430 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1432 	*filename = tu->filename;  in bpf_get_uprobe_info()
1433 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1475 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1482 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1483 	tu->nhit++;  in uprobe_dispatcher()
1485 	udd.tu = tu;  in uprobe_dispatcher()
1493 	dsize = __get_data_size(&tu->tp, regs);  in uprobe_dispatcher()
1494 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uprobe_dispatcher()
1497 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uprobe_dispatcher()
1499 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uprobe_dispatcher()
1500 		ret |= uprobe_trace_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1503 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uprobe_dispatcher()
1504 		ret |= uprobe_perf_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1513 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1518 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1520 	udd.tu = tu;  in uretprobe_dispatcher()
1528 	dsize = __get_data_size(&tu->tp, regs);  in uretprobe_dispatcher()
1529 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uretprobe_dispatcher()
1532 	store_trace_args(ucb->buf, &tu->tp, regs, esize, dsize);  in uretprobe_dispatcher()
1534 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uretprobe_dispatcher()
1535 		uretprobe_trace_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1538 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uretprobe_dispatcher()
1539 		uretprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1555 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1557 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1565 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1567 	init_trace_event_call(tu);  in register_uprobe_event()
1569 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1572 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1574 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1583 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1601 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1604 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1606 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1608 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1611 	tu->offset = offs;  in create_local_trace_uprobe()
1612 	tu->path = path;  in create_local_trace_uprobe()
1613 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1614 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1615 	if (!tu->filename) {  in create_local_trace_uprobe()
1620 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1622 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1623 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1628 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1630 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1636 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1638 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1640 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()