1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2008-2014 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
16  * The buffer size is currently PAGE_SIZE, although it may become dynamic
31 #define TRACE_SEQ_BUF_LEFT(s) seq_buf_buffer_left(&(s)->seq)
38 	if (unlikely(!s->seq.size))  in __trace_seq_init()
43  * trace_print_seq - move the contents of trace_seq into a seq_file
57 	ret = seq_buf_print_seq(m, &s->seq);  in trace_print_seq()
71  * trace_seq_printf - sequence printing of trace information
83 	unsigned int save_len = s->seq.len;  in trace_seq_printf()
86 	if (s->full)  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()
104  * trace_seq_bitmask - write a bitmask array in its ASCII representation
114 	unsigned int save_len = s->seq.len;  in trace_seq_bitmask()
116 	if (s->full)  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()
131  * trace_seq_vprintf - sequence printing of trace information
143 	unsigned int save_len = s->seq.len;  in trace_seq_vprintf()
145 	if (s->full)  in trace_seq_vprintf()
150 	seq_buf_vprintf(&s->seq, fmt, args);  in trace_seq_vprintf()
153 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_vprintf()
154 		s->seq.len = save_len;  in trace_seq_vprintf()
155 		s->full = 1;  in trace_seq_vprintf()
161  * trace_seq_bprintf - Write the printf string from binary arguments
177 	unsigned int save_len = s->seq.len;  in trace_seq_bprintf()
179 	if (s->full)  in trace_seq_bprintf()
184 	seq_buf_bprintf(&s->seq, fmt, binary);  in trace_seq_bprintf()
187 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_bprintf()
188 		s->seq.len = save_len;  in trace_seq_bprintf()
189 		s->full = 1;  in trace_seq_bprintf()
196  * trace_seq_puts - trace sequence printing of simple string
209 	if (s->full)  in trace_seq_puts()
215 		s->full = 1;  in trace_seq_puts()
219 	seq_buf_putmem(&s->seq, str, len);  in trace_seq_puts()
224  * trace_seq_putc - trace sequence printing of simple character
235 	if (s->full)  in trace_seq_putc()
241 		s->full = 1;  in trace_seq_putc()
245 	seq_buf_putc(&s->seq, c);  in trace_seq_putc()
250  * trace_seq_putmem - write raw data into the trace_seq buffer
261 	if (s->full)  in trace_seq_putmem()
267 		s->full = 1;  in trace_seq_putmem()
271 	seq_buf_putmem(&s->seq, mem, len);  in trace_seq_putmem()
276  * trace_seq_putmem_hex - write raw memory into the buffer in ASCII hex
288 	unsigned int save_len = s->seq.len;  in trace_seq_putmem_hex()
290 	if (s->full)  in trace_seq_putmem_hex()
297 		s->full = 1;  in trace_seq_putmem_hex()
302 	seq_buf_putmem_hex(&s->seq, mem, len);  in trace_seq_putmem_hex()
304 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_putmem_hex()
305 		s->seq.len = save_len;  in trace_seq_putmem_hex()
306 		s->full = 1;  in trace_seq_putmem_hex()
313  * trace_seq_path - copy a path into the sequence buffer
326 	unsigned int save_len = s->seq.len;  in trace_seq_path()
328 	if (s->full)  in trace_seq_path()
334 		s->full = 1;  in trace_seq_path()
338 	seq_buf_path(&s->seq, path, "\n");  in trace_seq_path()
340 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_path()
341 		s->seq.len = save_len;  in trace_seq_path()
342 		s->full = 1;  in trace_seq_path()
351  * trace_seq_to_user - copy the sequence buffer to user space
357  * by @ubuf. It starts from the last read position (@s->readpos)
359  * the content in the buffer (@s->len), which ever comes first.
364  * On failure it returns -EBUSY if all of the content in the
366  * sequence (@s->len == @s->readpos).
368  * Returns -EFAULT if the copy to userspace fails.
373 	return seq_buf_to_user(&s->seq, ubuf, cnt);  in trace_seq_to_user()
381 	unsigned int save_len = s->seq.len;  in trace_seq_hex_dump()
383 	if (s->full)  in trace_seq_hex_dump()
389 		s->full = 1;  in trace_seq_hex_dump()
393 	seq_buf_hex_dump(&(s->seq), prefix_str,  in trace_seq_hex_dump()
397 	if (unlikely(seq_buf_has_overflowed(&s->seq))) {  in trace_seq_hex_dump()
398 		s->seq.len = save_len;  in trace_seq_hex_dump()
399 		s->full = 1;  in trace_seq_hex_dump()