89 static int register_uprobe_event(struct trace_uprobe *tu);
90 static int unregister_uprobe_event(struct trace_uprobe *tu);
209 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
265 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
267 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
272 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_is_busy()  local
274 	return trace_probe_is_enabled(&tu->tp);  in trace_uprobe_is_busy()
277 static bool trace_uprobe_match_command_head(struct trace_uprobe *tu,  in trace_uprobe_match_command_head()  argument
286 	len = strlen(tu->filename);  in trace_uprobe_match_command_head()
287 	if (strncmp(tu->filename, argv[0], len) || argv[0][len] != ':')  in trace_uprobe_match_command_head()
290 	if (tu->ref_ctr_offset == 0)  in trace_uprobe_match_command_head()
292 				(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_match_command_head()
295 				(int)(sizeof(void *) * 2), tu->offset,  in trace_uprobe_match_command_head()
296 				tu->ref_ctr_offset);  in trace_uprobe_match_command_head()
302 	return trace_probe_match_command_args(&tu->tp, argc, argv);  in trace_uprobe_match_command_head()
308 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_match()  local
311 		strcmp(trace_probe_name(&tu->tp), event) == 0) &&  in trace_uprobe_match()
312 	   (!system || strcmp(trace_probe_group_name(&tu->tp), system) == 0) &&  in trace_uprobe_match()
313 	   trace_uprobe_match_command_head(tu, argc, argv);  in trace_uprobe_match()
334 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
337 	tu = kzalloc(struct_size(tu, tp.args, nargs), GFP_KERNEL);  in alloc_trace_uprobe()
338 	if (!tu)  in alloc_trace_uprobe()
341 	tu->nhits = alloc_percpu(unsigned long);  in alloc_trace_uprobe()
342 	if (!tu->nhits) {  in alloc_trace_uprobe()
347 	ret = trace_probe_init(&tu->tp, event, group, true, nargs);  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 	free_percpu(tu->nhits);  in alloc_trace_uprobe()
360 	kfree(tu);  in alloc_trace_uprobe()
365 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
367 	if (!tu)  in free_trace_uprobe()
370 	path_put(&tu->path);  in free_trace_uprobe()
371 	trace_probe_cleanup(&tu->tp);  in free_trace_uprobe()
372 	kfree(tu->filename);  in free_trace_uprobe()
373 	free_percpu(tu->nhits);  in free_trace_uprobe()
374 	kfree(tu);  in free_trace_uprobe()
380 	struct trace_uprobe *tu;  in find_probe_event()  local
382 	for_each_trace_uprobe(tu, pos)  in find_probe_event()
383 		if (strcmp(trace_probe_name(&tu->tp), event) == 0 &&  in find_probe_event()
384 		    strcmp(trace_probe_group_name(&tu->tp), group) == 0)  in find_probe_event()
385 			return tu;  in find_probe_event()
391 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
395 	if (trace_probe_has_sibling(&tu->tp))  in unregister_trace_uprobe()
399 	if (trace_event_dyn_busy(trace_probe_event_call(&tu->tp)))  in unregister_trace_uprobe()
402 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
407 	dyn_event_remove(&tu->devent);  in unregister_trace_uprobe()
408 	trace_probe_unlink(&tu->tp);  in unregister_trace_uprobe()
409 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
442 static int append_trace_uprobe(struct trace_uprobe *tu, struct trace_uprobe *to)  in append_trace_uprobe()  argument
446 	ret = trace_probe_compare_arg_type(&tu->tp, &to->tp);  in append_trace_uprobe()
453 	if (trace_uprobe_has_same_uprobe(to, tu)) {  in append_trace_uprobe()
460 	ret = trace_probe_append(&tu->tp, &to->tp);  in append_trace_uprobe()
462 		dyn_event_add(&tu->devent, trace_probe_event_call(&tu->tp));  in append_trace_uprobe()
494 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
501 	ret = validate_ref_ctr_offset(tu);  in register_trace_uprobe()
506 	old_tu = find_probe_event(trace_probe_name(&tu->tp),  in register_trace_uprobe()
507 				  trace_probe_group_name(&tu->tp));  in register_trace_uprobe()
509 		if (is_ret_probe(tu) != is_ret_probe(old_tu)) {  in register_trace_uprobe()
514 			ret = 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()
543 	struct trace_uprobe *tu;  in __trace_uprobe_create()  local
682 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in __trace_uprobe_create()
683 	if (IS_ERR(tu)) {  in __trace_uprobe_create()
684 		ret = PTR_ERR(tu);  in __trace_uprobe_create()
689 	tu->offset = offset;  in __trace_uprobe_create()
690 	tu->ref_ctr_offset = ref_ctr_offset;  in __trace_uprobe_create()
691 	tu->path = path;  in __trace_uprobe_create()
692 	tu->filename = filename;  in __trace_uprobe_create()
701 		ret = traceprobe_parse_probe_arg(&tu->tp, i, argv[i], &ctx);  in __trace_uprobe_create()
707 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in __trace_uprobe_create()
708 	ret = traceprobe_set_print_fmt(&tu->tp, ptype);  in __trace_uprobe_create()
712 	ret = register_trace_uprobe(tu);  in __trace_uprobe_create()
717 	free_trace_uprobe(tu);  in __trace_uprobe_create()
748 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_release()  local
750 	return unregister_trace_uprobe(tu);  in trace_uprobe_release()
756 	struct trace_uprobe *tu = to_trace_uprobe(ev);  in trace_uprobe_show()  local
757 	char c = is_ret_probe(tu) ? 'r' : 'p';  in trace_uprobe_show()
760 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, trace_probe_group_name(&tu->tp),  in trace_uprobe_show()
761 			trace_probe_name(&tu->tp), tu->filename,  in trace_uprobe_show()
762 			(int)(sizeof(void *) * 2), tu->offset);  in trace_uprobe_show()
764 	if (tu->ref_ctr_offset)  in trace_uprobe_show()
765 		seq_printf(m, "(0x%lx)", tu->ref_ctr_offset);  in trace_uprobe_show()
767 	for (i = 0; i < tu->tp.nr_args; i++)  in trace_uprobe_show()
768 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in trace_uprobe_show()
828 	struct trace_uprobe *tu;  in probes_profile_seq_show()  local
835 	tu = to_trace_uprobe(ev);  in probes_profile_seq_show()
839 		nhits += per_cpu(*tu->nhits, cpu);  in probes_profile_seq_show()
842 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
843 		   trace_probe_name(&tu->tp), nhits);  in probes_profile_seq_show()
969 static struct uprobe_cpu_buffer *prepare_uprobe_buffer(struct trace_uprobe *tu,  in prepare_uprobe_buffer()  argument
979 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in prepare_uprobe_buffer()
980 	dsize = __get_data_size(&tu->tp, regs, NULL);  in prepare_uprobe_buffer()
983 	ucb->dsize = tu->tp.size + dsize;  in prepare_uprobe_buffer()
987 		dsize = MAX_UCB_BUFFER_SIZE - tu->tp.size;  in prepare_uprobe_buffer()
990 	store_trace_args(ucb->buf, &tu->tp, regs, NULL, esize, dsize);  in prepare_uprobe_buffer()
996 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
1005 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_trace_func()
1012 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
1018 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
1033 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
1039 	if (is_ret_probe(tu))  in uprobe_trace_func()
1042 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uprobe_trace_func()
1045 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uprobe_trace_func()
1046 		__uprobe_trace_func(tu, 0, regs, ucb, link->file);  in uprobe_trace_func()
1052 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
1059 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in uretprobe_trace_func()
1062 	trace_probe_for_each_link_rcu(link, &tu->tp)  in uretprobe_trace_func()
1063 		__uprobe_trace_func(tu, func, regs, ucb, link->file);  in uretprobe_trace_func()
1073 	struct trace_uprobe *tu;  in print_uprobe_event()  local
1077 	tu = trace_uprobe_primary_from_call(  in print_uprobe_event()
1079 	if (unlikely(!tu))  in print_uprobe_event()
1082 	if (is_ret_probe(tu)) {  in print_uprobe_event()
1084 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1089 				 trace_probe_name(&tu->tp),  in print_uprobe_event()
1094 	if (trace_probe_print_args(s, tu->tp.args, tu->tp.nr_args, data, entry) < 0)  in print_uprobe_event()
1105 static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter)  in trace_uprobe_enable()  argument
1107 	struct inode *inode = d_real_inode(tu->path.dentry);  in trace_uprobe_enable()
1110 	tu->consumer.filter = filter;  in trace_uprobe_enable()
1111 	uprobe = uprobe_register(inode, tu->offset, tu->ref_ctr_offset, &tu->consumer);  in trace_uprobe_enable()
1115 	tu->uprobe = uprobe;  in trace_uprobe_enable()
1121 	struct trace_uprobe *tu;  in __probe_event_disable()  local
1124 	tu = container_of(tp, struct trace_uprobe, tp);  in __probe_event_disable()
1125 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in __probe_event_disable()
1127 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in __probe_event_disable()
1128 		if (!tu->uprobe)  in __probe_event_disable()
1131 		uprobe_unregister_nosync(tu->uprobe, &tu->consumer);  in __probe_event_disable()
1133 		tu->uprobe = NULL;  in __probe_event_disable()
1143 	struct trace_uprobe *tu;  in probe_event_enable()  local
1167 	tu = container_of(tp, struct trace_uprobe, tp);  in probe_event_enable()
1168 	WARN_ON(!uprobe_filter_is_empty(tu->tp.event->filter));  in probe_event_enable()
1177 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in probe_event_enable()
1178 		ret = trace_uprobe_enable(tu, filter);  in probe_event_enable()
1228 	struct trace_uprobe *tu;  in uprobe_event_define_fields()  local
1230 	tu = trace_uprobe_primary_from_call(event_call);  in uprobe_event_define_fields()
1231 	if (unlikely(!tu))  in uprobe_event_define_fields()
1234 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
1243 	return traceprobe_define_arg_fields(event_call, size, &tu->tp);  in uprobe_event_define_fields()
1320 	struct trace_uprobe *tu;  in uprobe_perf_close()  local
1327 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_close()
1328 	if (trace_uprobe_filter_remove(tu->tp.event->filter, event))  in uprobe_perf_close()
1331 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_close()
1332 		ret = uprobe_apply(tu->uprobe, &tu->consumer, false);  in uprobe_perf_close()
1344 	struct trace_uprobe *tu;  in uprobe_perf_open()  local
1351 	tu = container_of(tp, struct trace_uprobe, tp);  in uprobe_perf_open()
1352 	if (trace_uprobe_filter_add(tu->tp.event->filter, event))  in uprobe_perf_open()
1355 	list_for_each_entry(tu, trace_probe_probe_list(tp), tp.list) {  in uprobe_perf_open()
1356 		err = uprobe_apply(tu->uprobe, &tu->consumer, true);  in uprobe_perf_open()
1369 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1372 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1373 	filter = tu->tp.event->filter;  in uprobe_perf_filter()
1389 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1393 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in __uprobe_perf_func()
1411 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1413 	ucb = prepare_uprobe_buffer(tu, regs, ucbp);  in __uprobe_perf_func()
1428 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1449 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1452 	if (!uprobe_perf_filter(&tu->consumer, current->mm))  in uprobe_perf_func()
1455 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1456 		__uprobe_perf_func(tu, 0, regs, ucbp);  in uprobe_perf_func()
1460 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1464 	__uprobe_perf_func(tu, func, regs, ucbp);  in uretprobe_perf_func()
1473 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1476 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1478 		tu = trace_uprobe_primary_from_call(event->tp_event);  in bpf_get_uprobe_info()
1479 	if (!tu)  in bpf_get_uprobe_info()
1482 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1484 	*filename = tu->filename;  in bpf_get_uprobe_info()
1485 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1527 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1532 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1534 	this_cpu_inc(*tu->nhits);  in uprobe_dispatcher()
1536 	udd.tu = tu;  in uprobe_dispatcher()
1544 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uprobe_dispatcher()
1545 		ret |= uprobe_trace_func(tu, regs, &ucb);  in uprobe_dispatcher()
1548 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uprobe_dispatcher()
1549 		ret |= uprobe_perf_func(tu, regs, &ucb);  in uprobe_dispatcher()
1558 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1562 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1564 	udd.tu = tu;  in uretprobe_dispatcher()
1572 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_TRACE))  in uretprobe_dispatcher()
1573 		uretprobe_trace_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1576 	if (trace_probe_test_flag(&tu->tp, TP_FLAG_PROFILE))  in uretprobe_dispatcher()
1577 		uretprobe_perf_func(tu, func, regs, &ucb);  in uretprobe_dispatcher()
1593 static inline void init_trace_event_call(struct trace_uprobe *tu)  in init_trace_event_call()  argument
1595 	struct trace_event_call *call = trace_probe_event_call(&tu->tp);  in init_trace_event_call()
1603 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1605 	init_trace_event_call(tu);  in register_uprobe_event()
1607 	return trace_probe_register_event_call(&tu->tp);  in register_uprobe_event()
1610 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1612 	return trace_probe_unregister_event_call(&tu->tp);  in unregister_uprobe_event()
1621 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1639 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1642 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1644 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1646 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1649 	tu->offset = offs;  in create_local_trace_uprobe()
1650 	tu->path = path;  in create_local_trace_uprobe()
1651 	tu->ref_ctr_offset = ref_ctr_offset;  in create_local_trace_uprobe()
1652 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1653 	if (!tu->filename) {  in create_local_trace_uprobe()
1658 	init_trace_event_call(tu);  in create_local_trace_uprobe()
1660 	ptype = is_ret_probe(tu) ? PROBE_PRINT_RETURN : PROBE_PRINT_NORMAL;  in create_local_trace_uprobe()
1661 	if (traceprobe_set_print_fmt(&tu->tp, ptype) < 0) {  in create_local_trace_uprobe()
1666 	return trace_probe_event_call(&tu->tp);  in create_local_trace_uprobe()
1668 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1674 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1676 	tu = trace_uprobe_primary_from_call(event_call);  in destroy_local_trace_uprobe()
1678 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()