31 #define TRACE_SEQ_BUF_LEFT(s) seq_buf_buffer_left(&(s)->seq)  argument
34  * trace_seq should work with being initialized with 0s.
36 static inline void __trace_seq_init(struct trace_seq *s)  in __trace_seq_init()  argument
38 	if (unlikely(!s->seq.size))  in __trace_seq_init()
39 		trace_seq_init(s);  in __trace_seq_init()
45  * @s: the trace_seq descriptor that is the source.
51 int trace_print_seq(struct seq_file *m, struct trace_seq *s)  in trace_print_seq()  argument
55 	__trace_seq_init(s);  in trace_print_seq()
57 	ret = seq_buf_print_seq(m, &s->seq);  in trace_print_seq()
65 		trace_seq_init(s);  in trace_print_seq()
72  * @s: trace sequence descriptor
78  * buffer (@s). Then the output may be either used by
81 void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)  in trace_seq_printf()  argument
83 	unsigned int save_len = s->seq.len;  in trace_seq_printf()
86 	if (s->full)  in trace_seq_printf()
89 	__trace_seq_init(s);  in trace_seq_printf()
92 	seq_buf_vprintf(&s->seq, fmt, ap);  in trace_seq_printf()
96 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_printf()
97 		s->seq.len = save_len;  in trace_seq_printf()
98 		s->full = 1;  in trace_seq_printf()
105  * @s:		trace sequence descriptor
109  * Writes a ASCII representation of a bitmask string into @s.
111 void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,  in trace_seq_bitmask()  argument
114 	unsigned int save_len = s->seq.len;  in trace_seq_bitmask()
116 	if (s->full)  in trace_seq_bitmask()
119 	__trace_seq_init(s);  in trace_seq_bitmask()
121 	seq_buf_printf(&s->seq, "%*pb", nmaskbits, maskp);  in trace_seq_bitmask()
123 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_bitmask()
124 		s->seq.len = save_len;  in trace_seq_bitmask()
125 		s->full = 1;  in trace_seq_bitmask()
132  * @s: trace sequence descriptor
139  * buffer (@s). Then the output may be either used by
142 void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)  in trace_seq_vprintf()  argument
144 	unsigned int save_len = s->seq.len;  in trace_seq_vprintf()
146 	if (s->full)  in trace_seq_vprintf()
149 	__trace_seq_init(s);  in trace_seq_vprintf()
151 	seq_buf_vprintf(&s->seq, fmt, args);  in trace_seq_vprintf()
154 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_vprintf()
155 		s->seq.len = save_len;  in trace_seq_vprintf()
156 		s->full = 1;  in trace_seq_vprintf()
163  * @s: trace sequence descriptor
176 void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)  in trace_seq_bprintf()  argument
178 	unsigned int save_len = s->seq.len;  in trace_seq_bprintf()
180 	if (s->full)  in trace_seq_bprintf()
183 	__trace_seq_init(s);  in trace_seq_bprintf()
185 	seq_buf_bprintf(&s->seq, fmt, binary);  in trace_seq_bprintf()
188 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_bprintf()
189 		s->seq.len = save_len;  in trace_seq_bprintf()
190 		s->full = 1;  in trace_seq_bprintf()
198  * @s: trace sequence descriptor
203  * into a special buffer (@s) for later retrieval by a sequencer
206 void trace_seq_puts(struct trace_seq *s, const char *str)  in trace_seq_puts()  argument
210 	if (s->full)  in trace_seq_puts()
213 	__trace_seq_init(s);  in trace_seq_puts()
215 	if (len > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_puts()
216 		s->full = 1;  in trace_seq_puts()
220 	seq_buf_putmem(&s->seq, str, len);  in trace_seq_puts()
226  * @s: trace sequence descriptor
231  * into a special buffer (@s) for later retrieval by a sequencer
234 void trace_seq_putc(struct trace_seq *s, unsigned char c)  in trace_seq_putc()  argument
236 	if (s->full)  in trace_seq_putc()
239 	__trace_seq_init(s);  in trace_seq_putc()
241 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_putc()
242 		s->full = 1;  in trace_seq_putc()
246 	seq_buf_putc(&s->seq, c);  in trace_seq_putc()
252  * @s: trace sequence descriptor
260 void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len)  in trace_seq_putmem()  argument
262 	if (s->full)  in trace_seq_putmem()
265 	__trace_seq_init(s);  in trace_seq_putmem()
267 	if (len > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_putmem()
268 		s->full = 1;  in trace_seq_putmem()
272 	seq_buf_putmem(&s->seq, mem, len);  in trace_seq_putmem()
278  * @s: trace sequence descriptor
286 void trace_seq_putmem_hex(struct trace_seq *s, const void *mem,  in trace_seq_putmem_hex()  argument
289 	unsigned int save_len = s->seq.len;  in trace_seq_putmem_hex()
291 	if (s->full)  in trace_seq_putmem_hex()
294 	__trace_seq_init(s);  in trace_seq_putmem_hex()
297 	if (len * 2 > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_putmem_hex()
298 		s->full = 1;  in trace_seq_putmem_hex()
303 	seq_buf_putmem_hex(&s->seq, mem, len);  in trace_seq_putmem_hex()
305 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_putmem_hex()
306 		s->seq.len = save_len;  in trace_seq_putmem_hex()
307 		s->full = 1;  in trace_seq_putmem_hex()
315  * @s: trace sequence descriptor
325 int trace_seq_path(struct trace_seq *s, const struct path *path)  in trace_seq_path()  argument
327 	unsigned int save_len = s->seq.len;  in trace_seq_path()
329 	if (s->full)  in trace_seq_path()
332 	__trace_seq_init(s);  in trace_seq_path()
334 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_path()
335 		s->full = 1;  in trace_seq_path()
339 	seq_buf_path(&s->seq, path, "\n");  in trace_seq_path()
341 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_path()
342 		s->seq.len = save_len;  in trace_seq_path()
343 		s->full = 1;  in trace_seq_path()
353  * @s: trace sequence descriptor
358  * by @ubuf. It starts from the last read position (@s->readpos)
360  * the content in the buffer (@s->len), which ever comes first.
367  * sequence (@s->len == @s->readpos).
371 int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, int cnt)  in trace_seq_to_user()  argument
373 	__trace_seq_init(s);  in trace_seq_to_user()
374 	return seq_buf_to_user(&s->seq, ubuf, cnt);  in trace_seq_to_user()
378 int trace_seq_hex_dump(struct trace_seq *s, const char *prefix_str,  in trace_seq_hex_dump()  argument
382 	unsigned int save_len = s->seq.len;  in trace_seq_hex_dump()
384 	if (s->full)  in trace_seq_hex_dump()
387 	__trace_seq_init(s);  in trace_seq_hex_dump()
389 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_hex_dump()
390 		s->full = 1;  in trace_seq_hex_dump()
394 	seq_buf_hex_dump(&(s->seq), prefix_str,  in trace_seq_hex_dump()
398 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_hex_dump()
399 		s->seq.len = save_len;  in trace_seq_hex_dump()
400 		s->full = 1;  in trace_seq_hex_dump()
410  * @s: trace sequence descriptor
420 char *trace_seq_acquire(struct trace_seq *s, unsigned int len)  in trace_seq_acquire()  argument
422 	char *ret = trace_seq_buffer_ptr(s);  in trace_seq_acquire()
424 	if (!WARN_ON_ONCE(seq_buf_buffer_left(&s->seq) < len))  in trace_seq_acquire()
425 		seq_buf_commit(&s->seq, len);  in trace_seq_acquire()