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-rw-r--r--include/linux/trace_seq.h89
-rw-r--r--kernel/trace/trace.h15
-rw-r--r--kernel/trace/trace_output.h16
3 files changed, 92 insertions, 28 deletions
diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
new file mode 100644
index 000000000000..28051da876dd
--- /dev/null
+++ b/include/linux/trace_seq.h
@@ -0,0 +1,89 @@
1#ifndef _LINUX_TRACE_SEQ_H
2#define _LINUX_TRACE_SEQ_H
3
4/*
5 * Trace sequences are used to allow a function to call several other functions
6 * to create a string of data to use (up to a max of PAGE_SIZE.
7 */
8
9struct trace_seq {
10 unsigned char buffer[PAGE_SIZE];
11 unsigned int len;
12 unsigned int readpos;
13};
14
15static inline void
16trace_seq_init(struct trace_seq *s)
17{
18 s->len = 0;
19 s->readpos = 0;
20}
21
22/*
23 * Currently only defined when tracing is enabled.
24 */
25#ifdef CONFIG_TRACING
26extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
27 __attribute__ ((format (printf, 2, 3)));
28extern int
29trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
30extern void trace_print_seq(struct seq_file *m, struct trace_seq *s);
31extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
32 size_t cnt);
33extern int trace_seq_puts(struct trace_seq *s, const char *str);
34extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
35extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
36extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
37 size_t len);
38extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
39extern int trace_seq_path(struct trace_seq *s, struct path *path);
40
41#else /* CONFIG_TRACING */
42static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
43 __attribute__ ((format (printf, 2, 3)))
44{
45 return 0;
46}
47static inline int
48trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
49{
50 return 0;
51}
52
53static inline void trace_print_seq(struct seq_file *m, struct trace_seq *s)
54{
55}
56static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
57 size_t cnt)
58{
59 return 0;
60}
61static inline int trace_seq_puts(struct trace_seq *s, const char *str)
62{
63 return 0;
64}
65static inline int trace_seq_putc(struct trace_seq *s, unsigned char c);
66{
67 return 0;
68}
69static inline int
70trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
71{
72 return 0;
73}
74static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
75 size_t len)
76{
77 return 0;
78}
79static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
80{
81 return NULL;
82}
83static inline int trace_seq_path(struct trace_seq *s, struct path *path)
84{
85 return 0;
86}
87#endif /* CONFIG_TRACING */
88
89#endif /* _LINUX_TRACE_SEQ_H */
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b05b6ac982a1..1882846b7389 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -12,6 +12,8 @@
12#include <linux/kmemtrace.h> 12#include <linux/kmemtrace.h>
13#include <trace/power.h> 13#include <trace/power.h>
14 14
15#include <linux/trace_seq.h>
16
15enum trace_type { 17enum trace_type {
16 __TRACE_FIRST_TYPE = 0, 18 __TRACE_FIRST_TYPE = 0,
17 19
@@ -423,19 +425,6 @@ struct tracer {
423 struct tracer_stat *stats; 425 struct tracer_stat *stats;
424}; 426};
425 427
426struct trace_seq {
427 unsigned char buffer[PAGE_SIZE];
428 unsigned int len;
429 unsigned int readpos;
430};
431
432static inline void
433trace_seq_init(struct trace_seq *s)
434{
435 s->len = 0;
436 s->readpos = 0;
437}
438
439 428
440#define TRACE_PIPE_ALL_CPU -1 429#define TRACE_PIPE_ALL_CPU -1
441 430
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index 91630217fb46..5c7cbfb65c71 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -1,6 +1,7 @@
1#ifndef __TRACE_EVENTS_H 1#ifndef __TRACE_EVENTS_H
2#define __TRACE_EVENTS_H 2#define __TRACE_EVENTS_H
3 3
4#include <linux/trace_seq.h>
4#include "trace.h" 5#include "trace.h"
5 6
6typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, 7typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
@@ -20,24 +21,9 @@ trace_print_bprintk_msg_only(struct trace_iterator *iter);
20extern enum print_line_t 21extern enum print_line_t
21trace_print_printk_msg_only(struct trace_iterator *iter); 22trace_print_printk_msg_only(struct trace_iterator *iter);
22 23
23extern void trace_print_seq(struct seq_file *m, struct trace_seq *s);
24
25extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
26 __attribute__ ((format (printf, 2, 3)));
27extern int
28trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
29extern int 24extern int
30seq_print_ip_sym(struct trace_seq *s, unsigned long ip, 25seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
31 unsigned long sym_flags); 26 unsigned long sym_flags);
32extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
33 size_t cnt);
34extern int trace_seq_puts(struct trace_seq *s, const char *str);
35extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
36extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
37extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
38 size_t len);
39extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
40extern int trace_seq_path(struct trace_seq *s, struct path *path);
41extern int seq_print_userip_objs(const struct userstack_entry *entry, 27extern int seq_print_userip_objs(const struct userstack_entry *entry,
42 struct trace_seq *s, unsigned long sym_flags); 28 struct trace_seq *s, unsigned long sym_flags);
43extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, 29extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-15 14:07:23 -0500