58 static int register_uprobe_event(struct trace_uprobe *tu);
59 static int unregister_uprobe_event(struct trace_uprobe *tu);
65 	struct trace_uprobe	*tu;  member
175 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
227 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
229 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
238 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
246 	tu = kzalloc(SIZEOF_TRACE_UPROBE(nargs), GFP_KERNEL);  in alloc_trace_uprobe()
247 	if (!tu)  in alloc_trace_uprobe()
250 	tu->tp.call.class = &tu->tp.class;  in alloc_trace_uprobe()
251 	tu->tp.call.name = kstrdup(event, GFP_KERNEL);  in alloc_trace_uprobe()
252 	if (!tu->tp.call.name)  in alloc_trace_uprobe()
255 	tu->tp.class.system = kstrdup(group, GFP_KERNEL);  in alloc_trace_uprobe()
256 	if (!tu->tp.class.system)  in alloc_trace_uprobe()
259 	INIT_LIST_HEAD(&tu->list);  in alloc_trace_uprobe()
260 	INIT_LIST_HEAD(&tu->tp.files);  in alloc_trace_uprobe()
261 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
263 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
264 	init_trace_uprobe_filter(&tu->filter);  in alloc_trace_uprobe()
265 	return tu;  in alloc_trace_uprobe()
268 	kfree(tu->tp.call.name);  in alloc_trace_uprobe()
269 	kfree(tu);  in alloc_trace_uprobe()
274 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
278 	for (i = 0; i < tu->tp.nr_args; i++)  in free_trace_uprobe()
279 		traceprobe_free_probe_arg(&tu->tp.args[i]);  in free_trace_uprobe()
281 	path_put(&tu->path);  in free_trace_uprobe()
282 	kfree(tu->tp.call.class->system);  in free_trace_uprobe()
283 	kfree(tu->tp.call.name);  in free_trace_uprobe()
284 	kfree(tu->filename);  in free_trace_uprobe()
285 	kfree(tu);  in free_trace_uprobe()
290 	struct trace_uprobe *tu;  in find_probe_event()  local
292 	list_for_each_entry(tu, &uprobe_list, list)  in find_probe_event()
293 		if (strcmp(trace_event_name(&tu->tp.call), event) == 0 &&  in find_probe_event()
294 		    strcmp(tu->tp.call.class->system, group) == 0)  in find_probe_event()
295 			return tu;  in find_probe_event()
301 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
305 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
309 	list_del(&tu->list);  in unregister_trace_uprobe()
310 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
315 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
323 	old_tu = find_probe_event(trace_event_name(&tu->tp.call),  in register_trace_uprobe()
324 			tu->tp.call.class->system);  in register_trace_uprobe()
332 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
338 	list_add_tail(&tu->list, &uprobe_list);  in register_trace_uprobe()
354 	struct trace_uprobe *tu;  in create_trace_uprobe()  local
408 		tu = find_probe_event(event, group);  in create_trace_uprobe()
410 		if (!tu) {  in create_trace_uprobe()
416 		ret = unregister_trace_uprobe(tu);  in create_trace_uprobe()
468 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in create_trace_uprobe()
469 	if (IS_ERR(tu)) {  in create_trace_uprobe()
470 		pr_info("Failed to allocate trace_uprobe.(%d)\n", (int)PTR_ERR(tu));  in create_trace_uprobe()
471 		ret = PTR_ERR(tu);  in create_trace_uprobe()
474 	tu->offset = offset;  in create_trace_uprobe()
475 	tu->path = path;  in create_trace_uprobe()
476 	tu->filename = kstrdup(filename, GFP_KERNEL);  in create_trace_uprobe()
478 	if (!tu->filename) {  in create_trace_uprobe()
487 		struct probe_arg *parg = &tu->tp.args[i];  in create_trace_uprobe()
490 		tu->tp.nr_args++;  in create_trace_uprobe()
516 		if (traceprobe_conflict_field_name(parg->name, tu->tp.args, i)) {  in create_trace_uprobe()
524 		ret = traceprobe_parse_probe_arg(arg, &tu->tp.size, parg,  in create_trace_uprobe()
533 	ret = register_trace_uprobe(tu);  in create_trace_uprobe()
539 	free_trace_uprobe(tu);  in create_trace_uprobe()
552 	struct trace_uprobe *tu;  in cleanup_all_probes()  local
557 		tu = list_entry(uprobe_list.next, struct trace_uprobe, list);  in cleanup_all_probes()
558 		ret = unregister_trace_uprobe(tu);  in cleanup_all_probes()
585 	struct trace_uprobe *tu = v;  in probes_seq_show()  local
586 	char c = is_ret_probe(tu) ? 'r' : 'p';  in probes_seq_show()
589 	seq_printf(m, "%c:%s/%s %s:0x%0*lx", c, tu->tp.call.class->system,  in probes_seq_show()
590 			trace_event_name(&tu->tp.call), tu->filename,  in probes_seq_show()
591 			(int)(sizeof(void *) * 2), tu->offset);  in probes_seq_show()
593 	for (i = 0; i < tu->tp.nr_args; i++)  in probes_seq_show()
594 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in probes_seq_show()
638 	struct trace_uprobe *tu = v;  in probes_profile_seq_show()  local
640 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
641 			trace_event_name(&tu->tp.call), tu->nhit);  in probes_profile_seq_show()
757 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
767 	struct trace_event_call *call = &tu->tp.call;  in __uprobe_trace_func()
771 	if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))  in __uprobe_trace_func()
777 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
778 	size = esize + tu->tp.size + dsize;  in __uprobe_trace_func()
785 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
794 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_trace_func()
800 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
805 	if (is_ret_probe(tu))  in uprobe_trace_func()
809 	list_for_each_entry_rcu(link, &tu->tp.files, list)  in uprobe_trace_func()
810 		__uprobe_trace_func(tu, 0, regs, ucb, dsize, link->file);  in uprobe_trace_func()
816 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
823 	list_for_each_entry_rcu(link, &tu->tp.files, list)  in uretprobe_trace_func()
824 		__uprobe_trace_func(tu, func, regs, ucb, dsize, link->file);  in uretprobe_trace_func()
834 	struct trace_uprobe *tu;  in print_uprobe_event()  local
839 	tu = container_of(event, struct trace_uprobe, tp.call.event);  in print_uprobe_event()
841 	if (is_ret_probe(tu)) {  in print_uprobe_event()
843 				 trace_event_name(&tu->tp.call),  in print_uprobe_event()
848 				 trace_event_name(&tu->tp.call),  in print_uprobe_event()
853 	for (i = 0; i < tu->tp.nr_args; i++) {  in print_uprobe_event()
854 		struct probe_arg *parg = &tu->tp.args[i];  in print_uprobe_event()
871 probe_event_enable(struct trace_uprobe *tu, struct trace_event_file *file,  in probe_event_enable()  argument
874 	bool enabled = trace_probe_is_enabled(&tu->tp);  in probe_event_enable()
879 		if (tu->tp.flags & TP_FLAG_PROFILE)  in probe_event_enable()
887 		list_add_tail_rcu(&link->list, &tu->tp.files);  in probe_event_enable()
889 		tu->tp.flags |= TP_FLAG_TRACE;  in probe_event_enable()
891 		if (tu->tp.flags & TP_FLAG_TRACE)  in probe_event_enable()
894 		tu->tp.flags |= TP_FLAG_PROFILE;  in probe_event_enable()
897 	WARN_ON(!uprobe_filter_is_empty(&tu->filter));  in probe_event_enable()
906 	tu->consumer.filter = filter;  in probe_event_enable()
907 	tu->inode = d_real_inode(tu->path.dentry);  in probe_event_enable()
908 	ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);  in probe_event_enable()
921 		tu->tp.flags &= ~TP_FLAG_TRACE;  in probe_event_enable()
923 		tu->tp.flags &= ~TP_FLAG_PROFILE;  in probe_event_enable()
929 probe_event_disable(struct trace_uprobe *tu, struct trace_event_file *file)  in probe_event_disable()  argument
931 	if (!trace_probe_is_enabled(&tu->tp))  in probe_event_disable()
937 		link = find_event_file_link(&tu->tp, file);  in probe_event_disable()
946 		if (!list_empty(&tu->tp.files))  in probe_event_disable()
950 	WARN_ON(!uprobe_filter_is_empty(&tu->filter));  in probe_event_disable()
952 	uprobe_unregister(tu->inode, tu->offset, &tu->consumer);  in probe_event_disable()
953 	tu->inode = NULL;  in probe_event_disable()
954 	tu->tp.flags &= file ? ~TP_FLAG_TRACE : ~TP_FLAG_PROFILE;  in probe_event_disable()
963 	struct trace_uprobe *tu = event_call->data;  in uprobe_event_define_fields()  local
965 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
974 	for (i = 0; i < tu->tp.nr_args; i++) {  in uprobe_event_define_fields()
975 		struct probe_arg *parg = &tu->tp.args[i];  in uprobe_event_define_fields()
1006 uprobe_filter_event(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_filter_event()  argument
1008 	return __uprobe_perf_filter(&tu->filter, event->hw.target->mm);  in uprobe_filter_event()
1011 static int uprobe_perf_close(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_perf_close()  argument
1015 	write_lock(&tu->filter.rwlock);  in uprobe_perf_close()
1018 		done = tu->filter.nr_systemwide ||  in uprobe_perf_close()
1020 			uprobe_filter_event(tu, event);  in uprobe_perf_close()
1022 		tu->filter.nr_systemwide--;  in uprobe_perf_close()
1023 		done = tu->filter.nr_systemwide;  in uprobe_perf_close()
1025 	write_unlock(&tu->filter.rwlock);  in uprobe_perf_close()
1028 		return uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);  in uprobe_perf_close()
1033 static int uprobe_perf_open(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_perf_open()  argument
1038 	write_lock(&tu->filter.rwlock);  in uprobe_perf_open()
1048 		done = tu->filter.nr_systemwide ||  in uprobe_perf_open()
1050 			uprobe_filter_event(tu, event);  in uprobe_perf_open()
1051 		list_add(&event->hw.tp_list, &tu->filter.perf_events);  in uprobe_perf_open()
1053 		done = tu->filter.nr_systemwide;  in uprobe_perf_open()
1054 		tu->filter.nr_systemwide++;  in uprobe_perf_open()
1056 	write_unlock(&tu->filter.rwlock);  in uprobe_perf_open()
1060 		err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);  in uprobe_perf_open()
1062 			uprobe_perf_close(tu, event);  in uprobe_perf_open()
1070 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1073 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1074 	read_lock(&tu->filter.rwlock);  in uprobe_perf_filter()
1075 	ret = __uprobe_perf_filter(&tu->filter, mm);  in uprobe_perf_filter()
1076 	read_unlock(&tu->filter.rwlock);  in uprobe_perf_filter()
1081 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1085 	struct trace_event_call *call = &tu->tp.call;  in __uprobe_perf_func()
1095 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1097 	size = esize + tu->tp.size + dsize;  in __uprobe_perf_func()
1111 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1120 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_perf_func()
1122 	if (size - esize > tu->tp.size + dsize) {  in __uprobe_perf_func()
1123 		int len = tu->tp.size + dsize;  in __uprobe_perf_func()
1135 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1138 	if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))  in uprobe_perf_func()
1141 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1142 		__uprobe_perf_func(tu, 0, regs, ucb, dsize);  in uprobe_perf_func()
1146 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1150 	__uprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_perf_func()
1159 	struct trace_uprobe *tu;  in bpf_get_uprobe_info()  local
1162 		tu = find_probe_event(pevent, group);  in bpf_get_uprobe_info()
1164 		tu = event->tp_event->data;  in bpf_get_uprobe_info()
1165 	if (!tu)  in bpf_get_uprobe_info()
1168 	*fd_type = is_ret_probe(tu) ? BPF_FD_TYPE_URETPROBE  in bpf_get_uprobe_info()
1170 	*filename = tu->filename;  in bpf_get_uprobe_info()
1171 	*probe_offset = tu->offset;  in bpf_get_uprobe_info()
1180 	struct trace_uprobe *tu = event->data;  in trace_uprobe_register()  local
1185 		return probe_event_enable(tu, file, NULL);  in trace_uprobe_register()
1188 		probe_event_disable(tu, file);  in trace_uprobe_register()
1193 		return probe_event_enable(tu, NULL, uprobe_perf_filter);  in trace_uprobe_register()
1196 		probe_event_disable(tu, NULL);  in trace_uprobe_register()
1200 		return uprobe_perf_open(tu, data);  in trace_uprobe_register()
1203 		return uprobe_perf_close(tu, data);  in trace_uprobe_register()
1214 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1221 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1222 	tu->nhit++;  in uprobe_dispatcher()
1224 	udd.tu = tu;  in uprobe_dispatcher()
1232 	dsize = __get_data_size(&tu->tp, regs);  in uprobe_dispatcher()
1233 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uprobe_dispatcher()
1236 	store_trace_args(esize, &tu->tp, regs, ucb->buf, dsize);  in uprobe_dispatcher()
1238 	if (tu->tp.flags & TP_FLAG_TRACE)  in uprobe_dispatcher()
1239 		ret |= uprobe_trace_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1242 	if (tu->tp.flags & TP_FLAG_PROFILE)  in uprobe_dispatcher()
1243 		ret |= uprobe_perf_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1252 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1257 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1259 	udd.tu = tu;  in uretprobe_dispatcher()
1267 	dsize = __get_data_size(&tu->tp, regs);  in uretprobe_dispatcher()
1268 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uretprobe_dispatcher()
1271 	store_trace_args(esize, &tu->tp, regs, ucb->buf, dsize);  in uretprobe_dispatcher()
1273 	if (tu->tp.flags & TP_FLAG_TRACE)  in uretprobe_dispatcher()
1274 		uretprobe_trace_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1277 	if (tu->tp.flags & TP_FLAG_PROFILE)  in uretprobe_dispatcher()
1278 		uretprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1288 static inline void init_trace_event_call(struct trace_uprobe *tu,  in init_trace_event_call()  argument
1297 	call->data = tu;  in init_trace_event_call()
1300 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1302 	struct trace_event_call *call = &tu->tp.call;  in register_uprobe_event()
1305 	init_trace_event_call(tu, call);  in register_uprobe_event()
1307 	if (set_print_fmt(&tu->tp, is_ret_probe(tu)) < 0)  in register_uprobe_event()
1328 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1333 	ret = trace_remove_event_call(&tu->tp.call);  in unregister_uprobe_event()
1336 	kfree(tu->tp.call.print_fmt);  in unregister_uprobe_event()
1337 	tu->tp.call.print_fmt = NULL;  in unregister_uprobe_event()
1345 	struct trace_uprobe *tu;  in create_local_trace_uprobe()  local
1363 	tu = alloc_trace_uprobe(UPROBE_EVENT_SYSTEM, "DUMMY_EVENT", 0,  in create_local_trace_uprobe()
1366 	if (IS_ERR(tu)) {  in create_local_trace_uprobe()
1368 			(int)PTR_ERR(tu));  in create_local_trace_uprobe()
1370 		return ERR_CAST(tu);  in create_local_trace_uprobe()
1373 	tu->offset = offs;  in create_local_trace_uprobe()
1374 	tu->path = path;  in create_local_trace_uprobe()
1375 	tu->filename = kstrdup(name, GFP_KERNEL);  in create_local_trace_uprobe()
1376 	init_trace_event_call(tu, &tu->tp.call);  in create_local_trace_uprobe()
1378 	if (set_print_fmt(&tu->tp, is_ret_probe(tu)) < 0) {  in create_local_trace_uprobe()
1383 	return &tu->tp.call;  in create_local_trace_uprobe()
1385 	free_trace_uprobe(tu);  in create_local_trace_uprobe()
1391 	struct trace_uprobe *tu;  in destroy_local_trace_uprobe()  local
1393 	tu = container_of(event_call, struct trace_uprobe, tp.call);  in destroy_local_trace_uprobe()
1395 	kfree(tu->tp.call.print_fmt);  in destroy_local_trace_uprobe()
1396 	tu->tp.call.print_fmt = NULL;  in destroy_local_trace_uprobe()
1398 	free_trace_uprobe(tu);  in destroy_local_trace_uprobe()