1 // SPDX-License-Identifier: GPL-2.0
3  * trace_events_inject - trace event injection
53 	len = i - s;  in parse_field()
55 		return -EINVAL;  in parse_field()
59 		return -ENOMEM;  in parse_field()
63 		return -ENOENT;  in parse_field()
69 		return -EINVAL;  in parse_field()
74 	if (isdigit(str[i]) || str[i] == '-') {  in parse_field()
75 		char *num, c;  in parse_field()  local
80 			return -EINVAL;  in parse_field()
82 		if (str[i] == '-')  in parse_field()
88 		num = str + s;  in parse_field()
91 			return -EINVAL;  in parse_field()
94 		if (field->is_signed)  in parse_field()
95 			ret = kstrtoll(num, 0, &val);  in parse_field()
97 			ret = kstrtoull(num, 0, &val);  in parse_field()
107 		/* Make sure the field is OK for strings */  in parse_field()
109 			return -EINVAL;  in parse_field()
120 			return -EINVAL;  in parse_field()
124 		len = i - s;  in parse_field()
126 			return -EINVAL;  in parse_field()
135 	return -EINVAL;  in parse_field()
146 		if (field->size + field->offset > size)  in trace_get_entry_size()
147 			size = field->size + field->offset;  in trace_get_entry_size()
169 		if (field->filter_type == FILTER_STATIC_STRING)  in trace_alloc_entry()
171 		if (field->filter_type == FILTER_DYN_STRING ||  in trace_alloc_entry()
172 		    field->filter_type == FILTER_RDYN_STRING) {  in trace_alloc_entry()
176 			if (field->filter_type == FILTER_RDYN_STRING)  in trace_alloc_entry()
177 				str_loc -= field->offset + field->size;  in trace_alloc_entry()
179 			str_item = (u32 *)(entry + field->offset);  in trace_alloc_entry()
184 			paddr = (char **)(entry + field->offset);  in trace_alloc_entry()
207 		return -ENOMEM;  in parse_entry()
209 	tracing_generic_entry_update(entry, call->event.type,  in parse_entry()
214 			return -EINVAL;  in parse_entry()
219 			if (field->filter_type == FILTER_STATIC_STRING) {  in parse_entry()
220 				strscpy(entry + field->offset, addr, field->size);  in parse_entry()
221 			} else if (field->filter_type == FILTER_DYN_STRING ||  in parse_entry()
222 				   field->filter_type == FILTER_RDYN_STRING) {  in parse_entry()
231 					return -ENOMEM;  in parse_entry()
235 				strscpy(entry + (entry_size - str_len), addr, str_len);  in parse_entry()
236 				str_item = (u32 *)(entry + field->offset);  in parse_entry()
237 				if (field->filter_type == FILTER_RDYN_STRING)  in parse_entry()
238 					str_loc -= field->offset + field->size;  in parse_entry()
243 				paddr = (char **)(entry + field->offset);  in parse_entry()
247 			switch (field->size) {  in parse_entry()
251 				memcpy(entry + field->offset, &tmp, 1);  in parse_entry()
257 				memcpy(entry + field->offset, &tmp, 2);  in parse_entry()
263 				memcpy(entry + field->offset, &tmp, 4);  in parse_entry()
267 				memcpy(entry + field->offset, &val, 8);  in parse_entry()
270 				return -EINVAL;  in parse_entry()
289 	int err = -ENODEV, size;  in event_inject_write()
294 		return -EINVAL;  in event_inject_write()
304 		call = file->event_call;  in event_inject_write()
327 	return -EPERM;  in event_inject_read()