67 static int register_uprobe_event(struct trace_uprobe *tu);
68 static int unregister_uprobe_event(struct trace_uprobe *tu);
74 	struct trace_uprobe	*tu;  member
182 	base_addr = udd->bp_addr - udd->tu->offset;  in translate_user_vaddr()
230 static inline bool is_ret_probe(struct trace_uprobe *tu)  in is_ret_probe()  argument
232 	return tu->consumer.ret_handler != NULL;  in is_ret_probe()
241 	struct trace_uprobe *tu;  in alloc_trace_uprobe()  local
249 	tu = kzalloc(SIZEOF_TRACE_UPROBE(nargs), GFP_KERNEL);  in alloc_trace_uprobe()
250 	if (!tu)  in alloc_trace_uprobe()
253 	tu->tp.call.class = &tu->tp.class;  in alloc_trace_uprobe()
254 	tu->tp.call.name = kstrdup(event, GFP_KERNEL);  in alloc_trace_uprobe()
255 	if (!tu->tp.call.name)  in alloc_trace_uprobe()
258 	tu->tp.class.system = kstrdup(group, GFP_KERNEL);  in alloc_trace_uprobe()
259 	if (!tu->tp.class.system)  in alloc_trace_uprobe()
262 	INIT_LIST_HEAD(&tu->list);  in alloc_trace_uprobe()
263 	INIT_LIST_HEAD(&tu->tp.files);  in alloc_trace_uprobe()
264 	tu->consumer.handler = uprobe_dispatcher;  in alloc_trace_uprobe()
266 		tu->consumer.ret_handler = uretprobe_dispatcher;  in alloc_trace_uprobe()
267 	init_trace_uprobe_filter(&tu->filter);  in alloc_trace_uprobe()
268 	return tu;  in alloc_trace_uprobe()
271 	kfree(tu->tp.call.name);  in alloc_trace_uprobe()
272 	kfree(tu);  in alloc_trace_uprobe()
277 static void free_trace_uprobe(struct trace_uprobe *tu)  in free_trace_uprobe()  argument
281 	for (i = 0; i < tu->tp.nr_args; i++)  in free_trace_uprobe()
282 		traceprobe_free_probe_arg(&tu->tp.args[i]);  in free_trace_uprobe()
284 	iput(tu->inode);  in free_trace_uprobe()
285 	kfree(tu->tp.call.class->system);  in free_trace_uprobe()
286 	kfree(tu->tp.call.name);  in free_trace_uprobe()
287 	kfree(tu->filename);  in free_trace_uprobe()
288 	kfree(tu);  in free_trace_uprobe()
293 	struct trace_uprobe *tu;  in find_probe_event()  local
295 	list_for_each_entry(tu, &uprobe_list, list)  in find_probe_event()
296 		if (strcmp(ftrace_event_name(&tu->tp.call), event) == 0 &&  in find_probe_event()
297 		    strcmp(tu->tp.call.class->system, group) == 0)  in find_probe_event()
298 			return tu;  in find_probe_event()
304 static int unregister_trace_uprobe(struct trace_uprobe *tu)  in unregister_trace_uprobe()  argument
308 	ret = unregister_uprobe_event(tu);  in unregister_trace_uprobe()
312 	list_del(&tu->list);  in unregister_trace_uprobe()
313 	free_trace_uprobe(tu);  in unregister_trace_uprobe()
318 static int register_trace_uprobe(struct trace_uprobe *tu)  in register_trace_uprobe()  argument
326 	old_tu = find_probe_event(ftrace_event_name(&tu->tp.call),  in register_trace_uprobe()
327 			tu->tp.call.class->system);  in register_trace_uprobe()
335 	ret = register_uprobe_event(tu);  in register_trace_uprobe()
341 	list_add_tail(&tu->list, &uprobe_list);  in register_trace_uprobe()
357 	struct trace_uprobe *tu;  in create_trace_uprobe()  local
413 		tu = find_probe_event(event, group);  in create_trace_uprobe()
415 		if (!tu) {  in create_trace_uprobe()
421 		ret = unregister_trace_uprobe(tu);  in create_trace_uprobe()
481 	tu = alloc_trace_uprobe(group, event, argc, is_return);  in create_trace_uprobe()
482 	if (IS_ERR(tu)) {  in create_trace_uprobe()
483 		pr_info("Failed to allocate trace_uprobe.(%d)\n", (int)PTR_ERR(tu));  in create_trace_uprobe()
484 		ret = PTR_ERR(tu);  in create_trace_uprobe()
487 	tu->offset = offset;  in create_trace_uprobe()
488 	tu->inode = inode;  in create_trace_uprobe()
489 	tu->filename = kstrdup(filename, GFP_KERNEL);  in create_trace_uprobe()
491 	if (!tu->filename) {  in create_trace_uprobe()
500 		struct probe_arg *parg = &tu->tp.args[i];  in create_trace_uprobe()
503 		tu->tp.nr_args++;  in create_trace_uprobe()
529 		if (traceprobe_conflict_field_name(parg->name, tu->tp.args, i)) {  in create_trace_uprobe()
537 		ret = traceprobe_parse_probe_arg(arg, &tu->tp.size, parg,  in create_trace_uprobe()
546 	ret = register_trace_uprobe(tu);  in create_trace_uprobe()
552 	free_trace_uprobe(tu);  in create_trace_uprobe()
565 	struct trace_uprobe *tu;  in cleanup_all_probes()  local
570 		tu = list_entry(uprobe_list.next, struct trace_uprobe, list);  in cleanup_all_probes()
571 		ret = unregister_trace_uprobe(tu);  in cleanup_all_probes()
598 	struct trace_uprobe *tu = v;  in probes_seq_show()  local
599 	char c = is_ret_probe(tu) ? 'r' : 'p';  in probes_seq_show()
602 	seq_printf(m, "%c:%s/%s", c, tu->tp.call.class->system,  in probes_seq_show()
603 			ftrace_event_name(&tu->tp.call));  in probes_seq_show()
604 	seq_printf(m, " %s:0x%p", tu->filename, (void *)tu->offset);  in probes_seq_show()
606 	for (i = 0; i < tu->tp.nr_args; i++)  in probes_seq_show()
607 		seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);  in probes_seq_show()
651 	struct trace_uprobe *tu = v;  in probes_profile_seq_show()  local
653 	seq_printf(m, "  %s %-44s %15lu\n", tu->filename,  in probes_profile_seq_show()
654 			ftrace_event_name(&tu->tp.call), tu->nhit);  in probes_profile_seq_show()
770 static void __uprobe_trace_func(struct trace_uprobe *tu,  in __uprobe_trace_func()  argument
780 	struct ftrace_event_call *call = &tu->tp.call;  in __uprobe_trace_func()
784 	if (WARN_ON_ONCE(tu->tp.size + dsize > PAGE_SIZE))  in __uprobe_trace_func()
790 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_trace_func()
791 	size = esize + tu->tp.size + dsize;  in __uprobe_trace_func()
798 	if (is_ret_probe(tu)) {  in __uprobe_trace_func()
807 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_trace_func()
813 static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_trace_func()  argument
818 	if (is_ret_probe(tu))  in uprobe_trace_func()
822 	list_for_each_entry_rcu(link, &tu->tp.files, list)  in uprobe_trace_func()
823 		__uprobe_trace_func(tu, 0, regs, ucb, dsize, link->file);  in uprobe_trace_func()
829 static void uretprobe_trace_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_trace_func()  argument
836 	list_for_each_entry_rcu(link, &tu->tp.files, list)  in uretprobe_trace_func()
837 		__uprobe_trace_func(tu, func, regs, ucb, dsize, link->file);  in uretprobe_trace_func()
847 	struct trace_uprobe *tu;  in print_uprobe_event()  local
852 	tu = container_of(event, struct trace_uprobe, tp.call.event);  in print_uprobe_event()
854 	if (is_ret_probe(tu)) {  in print_uprobe_event()
856 				 ftrace_event_name(&tu->tp.call),  in print_uprobe_event()
861 				 ftrace_event_name(&tu->tp.call),  in print_uprobe_event()
866 	for (i = 0; i < tu->tp.nr_args; i++) {  in print_uprobe_event()
867 		struct probe_arg *parg = &tu->tp.args[i];  in print_uprobe_event()
884 probe_event_enable(struct trace_uprobe *tu, struct ftrace_event_file *file,  in probe_event_enable()  argument
887 	bool enabled = trace_probe_is_enabled(&tu->tp);  in probe_event_enable()
892 		if (tu->tp.flags & TP_FLAG_PROFILE)  in probe_event_enable()
900 		list_add_tail_rcu(&link->list, &tu->tp.files);  in probe_event_enable()
902 		tu->tp.flags |= TP_FLAG_TRACE;  in probe_event_enable()
904 		if (tu->tp.flags & TP_FLAG_TRACE)  in probe_event_enable()
907 		tu->tp.flags |= TP_FLAG_PROFILE;  in probe_event_enable()
910 	WARN_ON(!uprobe_filter_is_empty(&tu->filter));  in probe_event_enable()
919 	tu->consumer.filter = filter;  in probe_event_enable()
920 	ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);  in probe_event_enable()
933 		tu->tp.flags &= ~TP_FLAG_TRACE;  in probe_event_enable()
935 		tu->tp.flags &= ~TP_FLAG_PROFILE;  in probe_event_enable()
941 probe_event_disable(struct trace_uprobe *tu, struct ftrace_event_file *file)  in probe_event_disable()  argument
943 	if (!trace_probe_is_enabled(&tu->tp))  in probe_event_disable()
949 		link = find_event_file_link(&tu->tp, file);  in probe_event_disable()
958 		if (!list_empty(&tu->tp.files))  in probe_event_disable()
962 	WARN_ON(!uprobe_filter_is_empty(&tu->filter));  in probe_event_disable()
964 	uprobe_unregister(tu->inode, tu->offset, &tu->consumer);  in probe_event_disable()
965 	tu->tp.flags &= file ? ~TP_FLAG_TRACE : ~TP_FLAG_PROFILE;  in probe_event_disable()
974 	struct trace_uprobe *tu = event_call->data;  in uprobe_event_define_fields()  local
976 	if (is_ret_probe(tu)) {  in uprobe_event_define_fields()
985 	for (i = 0; i < tu->tp.nr_args; i++) {  in uprobe_event_define_fields()
986 		struct probe_arg *parg = &tu->tp.args[i];  in uprobe_event_define_fields()
1017 uprobe_filter_event(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_filter_event()  argument
1019 	return __uprobe_perf_filter(&tu->filter, event->hw.target->mm);  in uprobe_filter_event()
1022 static int uprobe_perf_close(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_perf_close()  argument
1026 	write_lock(&tu->filter.rwlock);  in uprobe_perf_close()
1029 		done = tu->filter.nr_systemwide ||  in uprobe_perf_close()
1031 			uprobe_filter_event(tu, event);  in uprobe_perf_close()
1033 		tu->filter.nr_systemwide--;  in uprobe_perf_close()
1034 		done = tu->filter.nr_systemwide;  in uprobe_perf_close()
1036 	write_unlock(&tu->filter.rwlock);  in uprobe_perf_close()
1039 		return uprobe_apply(tu->inode, tu->offset, &tu->consumer, false);  in uprobe_perf_close()
1044 static int uprobe_perf_open(struct trace_uprobe *tu, struct perf_event *event)  in uprobe_perf_open()  argument
1049 	write_lock(&tu->filter.rwlock);  in uprobe_perf_open()
1059 		done = tu->filter.nr_systemwide ||  in uprobe_perf_open()
1061 			uprobe_filter_event(tu, event);  in uprobe_perf_open()
1062 		list_add(&event->hw.tp_list, &tu->filter.perf_events);  in uprobe_perf_open()
1064 		done = tu->filter.nr_systemwide;  in uprobe_perf_open()
1065 		tu->filter.nr_systemwide++;  in uprobe_perf_open()
1067 	write_unlock(&tu->filter.rwlock);  in uprobe_perf_open()
1071 		err = uprobe_apply(tu->inode, tu->offset, &tu->consumer, true);  in uprobe_perf_open()
1073 			uprobe_perf_close(tu, event);  in uprobe_perf_open()
1081 	struct trace_uprobe *tu;  in uprobe_perf_filter()  local
1084 	tu = container_of(uc, struct trace_uprobe, consumer);  in uprobe_perf_filter()
1085 	read_lock(&tu->filter.rwlock);  in uprobe_perf_filter()
1086 	ret = __uprobe_perf_filter(&tu->filter, mm);  in uprobe_perf_filter()
1087 	read_unlock(&tu->filter.rwlock);  in uprobe_perf_filter()
1092 static void __uprobe_perf_func(struct trace_uprobe *tu,  in __uprobe_perf_func()  argument
1096 	struct ftrace_event_call *call = &tu->tp.call;  in __uprobe_perf_func()
1103 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in __uprobe_perf_func()
1105 	size = esize + tu->tp.size + dsize;  in __uprobe_perf_func()
1119 	if (is_ret_probe(tu)) {  in __uprobe_perf_func()
1128 	memcpy(data, ucb->buf, tu->tp.size + dsize);  in __uprobe_perf_func()
1130 	if (size - esize > tu->tp.size + dsize) {  in __uprobe_perf_func()
1131 		int len = tu->tp.size + dsize;  in __uprobe_perf_func()
1142 static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs,  in uprobe_perf_func()  argument
1145 	if (!uprobe_perf_filter(&tu->consumer, 0, current->mm))  in uprobe_perf_func()
1148 	if (!is_ret_probe(tu))  in uprobe_perf_func()
1149 		__uprobe_perf_func(tu, 0, regs, ucb, dsize);  in uprobe_perf_func()
1153 static void uretprobe_perf_func(struct trace_uprobe *tu, unsigned long func,  in uretprobe_perf_func()  argument
1157 	__uprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_perf_func()
1165 	struct trace_uprobe *tu = event->data;  in trace_uprobe_register()  local
1170 		return probe_event_enable(tu, file, NULL);  in trace_uprobe_register()
1173 		probe_event_disable(tu, file);  in trace_uprobe_register()
1178 		return probe_event_enable(tu, NULL, uprobe_perf_filter);  in trace_uprobe_register()
1181 		probe_event_disable(tu, NULL);  in trace_uprobe_register()
1185 		return uprobe_perf_open(tu, data);  in trace_uprobe_register()
1188 		return uprobe_perf_close(tu, data);  in trace_uprobe_register()
1199 	struct trace_uprobe *tu;  in uprobe_dispatcher()  local
1206 	tu = container_of(con, struct trace_uprobe, consumer);  in uprobe_dispatcher()
1207 	tu->nhit++;  in uprobe_dispatcher()
1209 	udd.tu = tu;  in uprobe_dispatcher()
1217 	dsize = __get_data_size(&tu->tp, regs);  in uprobe_dispatcher()
1218 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uprobe_dispatcher()
1221 	store_trace_args(esize, &tu->tp, regs, ucb->buf, dsize);  in uprobe_dispatcher()
1223 	if (tu->tp.flags & TP_FLAG_TRACE)  in uprobe_dispatcher()
1224 		ret |= uprobe_trace_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1227 	if (tu->tp.flags & TP_FLAG_PROFILE)  in uprobe_dispatcher()
1228 		ret |= uprobe_perf_func(tu, regs, ucb, dsize);  in uprobe_dispatcher()
1237 	struct trace_uprobe *tu;  in uretprobe_dispatcher()  local
1242 	tu = container_of(con, struct trace_uprobe, consumer);  in uretprobe_dispatcher()
1244 	udd.tu = tu;  in uretprobe_dispatcher()
1252 	dsize = __get_data_size(&tu->tp, regs);  in uretprobe_dispatcher()
1253 	esize = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));  in uretprobe_dispatcher()
1256 	store_trace_args(esize, &tu->tp, regs, ucb->buf, dsize);  in uretprobe_dispatcher()
1258 	if (tu->tp.flags & TP_FLAG_TRACE)  in uretprobe_dispatcher()
1259 		uretprobe_trace_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1262 	if (tu->tp.flags & TP_FLAG_PROFILE)  in uretprobe_dispatcher()
1263 		uretprobe_perf_func(tu, func, regs, ucb, dsize);  in uretprobe_dispatcher()
1273 static int register_uprobe_event(struct trace_uprobe *tu)  in register_uprobe_event()  argument
1275 	struct ftrace_event_call *call = &tu->tp.call;  in register_uprobe_event()
1283 	if (set_print_fmt(&tu->tp, is_ret_probe(tu)) < 0)  in register_uprobe_event()
1293 	call->data = tu;  in register_uprobe_event()
1306 static int unregister_uprobe_event(struct trace_uprobe *tu)  in unregister_uprobe_event()  argument
1311 	ret = trace_remove_event_call(&tu->tp.call);  in unregister_uprobe_event()
1314 	kfree(tu->tp.call.print_fmt);  in unregister_uprobe_event()
1315 	tu->tp.call.print_fmt = NULL;  in unregister_uprobe_event()