28 #define TRACE_SEQ_BUF_LEFT(s) seq_buf_buffer_left(&(s)->seq)  argument
31  * trace_seq should work with being initialized with 0s.
33 static inline void __trace_seq_init(struct trace_seq *s)  in __trace_seq_init()  argument
35 	if (unlikely(!s->seq.size))  in __trace_seq_init()
36 		trace_seq_init(s);  in __trace_seq_init()
42  * @s: the trace_seq descriptor that is the source.
48 int trace_print_seq(struct seq_file *m, struct trace_seq *s)  in trace_print_seq()  argument
52 	__trace_seq_init(s);  in trace_print_seq()
54 	ret = seq_buf_print_seq(m, &s->seq);  in trace_print_seq()
62 		trace_seq_init(s);  in trace_print_seq()
69  * @s: trace sequence descriptor
75  * buffer (@s). Then the output may be either used by
78 void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)  in trace_seq_printf()  argument
80 	unsigned int save_len = s->seq.len;  in trace_seq_printf()
83 	if (s->full)  in trace_seq_printf()
86 	__trace_seq_init(s);  in trace_seq_printf()
89 	seq_buf_vprintf(&s->seq, fmt, ap);  in trace_seq_printf()
93 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_printf()
94 		s->seq.len = save_len;  in trace_seq_printf()
95 		s->full = 1;  in trace_seq_printf()
102  * @s:		trace sequence descriptor
106  * Writes a ASCII representation of a bitmask string into @s.
108 void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,  in trace_seq_bitmask()  argument
111 	unsigned int save_len = s->seq.len;  in trace_seq_bitmask()
113 	if (s->full)  in trace_seq_bitmask()
116 	__trace_seq_init(s);  in trace_seq_bitmask()
118 	seq_buf_printf(&s->seq, "%*pb", nmaskbits, maskp);  in trace_seq_bitmask()
120 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_bitmask()
121 		s->seq.len = save_len;  in trace_seq_bitmask()
122 		s->full = 1;  in trace_seq_bitmask()
129  * @s: trace sequence descriptor
136  * buffer (@s). Then the output may be either used by
139 void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)  in trace_seq_vprintf()  argument
141 	unsigned int save_len = s->seq.len;  in trace_seq_vprintf()
143 	if (s->full)  in trace_seq_vprintf()
146 	__trace_seq_init(s);  in trace_seq_vprintf()
148 	seq_buf_vprintf(&s->seq, fmt, args);  in trace_seq_vprintf()
151 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_vprintf()
152 		s->seq.len = save_len;  in trace_seq_vprintf()
153 		s->full = 1;  in trace_seq_vprintf()
160  * @s: trace sequence descriptor
173 void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)  in trace_seq_bprintf()  argument
175 	unsigned int save_len = s->seq.len;  in trace_seq_bprintf()
177 	if (s->full)  in trace_seq_bprintf()
180 	__trace_seq_init(s);  in trace_seq_bprintf()
182 	seq_buf_bprintf(&s->seq, fmt, binary);  in trace_seq_bprintf()
185 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_bprintf()
186 		s->seq.len = save_len;  in trace_seq_bprintf()
187 		s->full = 1;  in trace_seq_bprintf()
195  * @s: trace sequence descriptor
200  * into a special buffer (@s) for later retrieval by a sequencer
203 void trace_seq_puts(struct trace_seq *s, const char *str)  in trace_seq_puts()  argument
207 	if (s->full)  in trace_seq_puts()
210 	__trace_seq_init(s);  in trace_seq_puts()
212 	if (len > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_puts()
213 		s->full = 1;  in trace_seq_puts()
217 	seq_buf_putmem(&s->seq, str, len);  in trace_seq_puts()
223  * @s: trace sequence descriptor
228  * into a special buffer (@s) for later retrieval by a sequencer
231 void trace_seq_putc(struct trace_seq *s, unsigned char c)  in trace_seq_putc()  argument
233 	if (s->full)  in trace_seq_putc()
236 	__trace_seq_init(s);  in trace_seq_putc()
238 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_putc()
239 		s->full = 1;  in trace_seq_putc()
243 	seq_buf_putc(&s->seq, c);  in trace_seq_putc()
249  * @s: trace sequence descriptor
257 void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len)  in trace_seq_putmem()  argument
259 	if (s->full)  in trace_seq_putmem()
262 	__trace_seq_init(s);  in trace_seq_putmem()
264 	if (len > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_putmem()
265 		s->full = 1;  in trace_seq_putmem()
269 	seq_buf_putmem(&s->seq, mem, len);  in trace_seq_putmem()
275  * @s: trace sequence descriptor
283 void trace_seq_putmem_hex(struct trace_seq *s, const void *mem,  in trace_seq_putmem_hex()  argument
286 	unsigned int save_len = s->seq.len;  in trace_seq_putmem_hex()
288 	if (s->full)  in trace_seq_putmem_hex()
291 	__trace_seq_init(s);  in trace_seq_putmem_hex()
294 	if (len * 2 > TRACE_SEQ_BUF_LEFT(s)) {  in trace_seq_putmem_hex()
295 		s->full = 1;  in trace_seq_putmem_hex()
300 	seq_buf_putmem_hex(&s->seq, mem, len);  in trace_seq_putmem_hex()
302 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_putmem_hex()
303 		s->seq.len = save_len;  in trace_seq_putmem_hex()
304 		s->full = 1;  in trace_seq_putmem_hex()
312  * @s: trace sequence descriptor
322 int trace_seq_path(struct trace_seq *s, const struct path *path)  in trace_seq_path()  argument
324 	unsigned int save_len = s->seq.len;  in trace_seq_path()
326 	if (s->full)  in trace_seq_path()
329 	__trace_seq_init(s);  in trace_seq_path()
331 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_path()
332 		s->full = 1;  in trace_seq_path()
336 	seq_buf_path(&s->seq, path, "\n");  in trace_seq_path()
338 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_path()
339 		s->seq.len = save_len;  in trace_seq_path()
340 		s->full = 1;  in trace_seq_path()
350  * @s: trace sequence descriptor
355  * by @ubuf. It starts from the last read position (@s->readpos)
357  * the content in the buffer (@s->len), which ever comes first.
364  * sequence (@s->len == @s->readpos).
368 int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, int cnt)  in trace_seq_to_user()  argument
371 	__trace_seq_init(s);  in trace_seq_to_user()
372 	ret = seq_buf_to_user(&s->seq, ubuf, s->readpos, cnt);  in trace_seq_to_user()
374 		s->readpos += ret;  in trace_seq_to_user()
379 int trace_seq_hex_dump(struct trace_seq *s, const char *prefix_str,  in trace_seq_hex_dump()  argument
383 	unsigned int save_len = s->seq.len;  in trace_seq_hex_dump()
385 	if (s->full)  in trace_seq_hex_dump()
388 	__trace_seq_init(s);  in trace_seq_hex_dump()
390 	if (TRACE_SEQ_BUF_LEFT(s) < 1) {  in trace_seq_hex_dump()
391 		s->full = 1;  in trace_seq_hex_dump()
395 	seq_buf_hex_dump(&(s->seq), prefix_str,  in trace_seq_hex_dump()
399 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_hex_dump()
400 		s->seq.len = save_len;  in trace_seq_hex_dump()
401 		s->full = 1;  in trace_seq_hex_dump()
411  * @s: trace sequence descriptor
421 char *trace_seq_acquire(struct trace_seq *s, unsigned int len)  in trace_seq_acquire()  argument
423 	char *ret = trace_seq_buffer_ptr(s);  in trace_seq_acquire()
425 	if (!WARN_ON_ONCE(seq_buf_buffer_left(&s->seq) < len))  in trace_seq_acquire()
426 		seq_buf_commit(&s->seq, len);  in trace_seq_acquire()