Release 4.12 include/linux/trace_seq.h

#ifndef _LINUX_TRACE_SEQ_H

#define _LINUX_TRACE_SEQ_H

#include <linux/seq_buf.h>

#include <asm/page.h>

/*
 * Trace sequences are used to allow a function to call several other functions
 * to create a string of data to use (up to a max of PAGE_SIZE).
 */


struct trace_seq {
	
unsigned char		buffer[PAGE_SIZE];
	
struct seq_buf		seq;
	
int			full;
};


static inline void

trace_seq_init(struct trace_seq *s)
{
	seq_buf_init(&s->seq, s->buffer, PAGE_SIZE);
	s->full = 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
27
84.38%
2
66.67%
Johannes Berg
5
15.62%
1
33.33%
Total
32
100.00%
3
100.00%

/**
 * trace_seq_used - amount of actual data written to buffer
 * @s: trace sequence descriptor
 *
 * Returns the amount of data written to the buffer.
 *
 * IMPORTANT!
 *
 * Use this instead of @s->seq.len if you need to pass the amount
 * of data from the buffer to another buffer (userspace, or what not).
 * The @s->seq.len on overflow is bigger than the buffer size and
 * using it can cause access to undefined memory.
 */


static inline int trace_seq_used(struct trace_seq *s)
{
	return seq_buf_used(&s->seq);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%

/**
 * trace_seq_buffer_ptr - return pointer to next location in buffer
 * @s: trace sequence descriptor
 *
 * Returns the pointer to the buffer where the next write to
 * the buffer will happen. This is useful to save the location
 * that is about to be written to and then return the result
 * of that write.
 */

static inline unsigned char *

trace_seq_buffer_ptr(struct trace_seq *s)
{
	return s->buffer + seq_buf_used(&s->seq);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
27
100.00%
3
100.00%
Total
27
100.00%
3
100.00%

/**
 * trace_seq_has_overflowed - return true if the trace_seq took too much
 * @s: trace sequence descriptor
 *
 * Returns true if too much data was added to the trace_seq and it is
 * now full and will not take anymore.
 */


static inline bool trace_seq_has_overflowed(struct trace_seq *s)
{
	return s->full || seq_buf_has_overflowed(&s->seq);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
25
100.00%
2
100.00%
Total
25
100.00%
2
100.00%

/*
 * Currently only defined when tracing is enabled.
 */
#ifdef CONFIG_TRACING
extern __printf(2, 3)
void trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
extern __printf(2, 0)
void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args);
extern void
trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
			     int cnt);
extern void trace_seq_puts(struct trace_seq *s, const char *str);
extern void trace_seq_putc(struct trace_seq *s, unsigned char c);
extern void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len);
extern void trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
				unsigned int len);
extern int trace_seq_path(struct trace_seq *s, const struct path *path);

extern void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
			     int nmaskbits);

#else /* CONFIG_TRACING */


static inline void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
18
100.00%
2
100.00%
Total
18
100.00%
2
100.00%


static inline void

trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
{
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
21
100.00%
2
100.00%
Total
21
100.00%
2
100.00%


static inline void

trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
		  int nmaskbits)
{
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
20
100.00%
2
100.00%
Total
20
100.00%
2
100.00%



static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
20
100.00%
2
100.00%
Total
20
100.00%
2
100.00%



static inline int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
				    int cnt)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
23
100.00%
2
100.00%
Total
23
100.00%
2
100.00%



static inline void trace_seq_puts(struct trace_seq *s, const char *str)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
16
100.00%
2
100.00%
Total
16
100.00%
2
100.00%



static inline void trace_seq_putc(struct trace_seq *s, unsigned char c)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
15
100.00%
2
100.00%
Total
15
100.00%
2
100.00%


static inline void

trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
20
100.00%
3
100.00%
Total
20
100.00%
3
100.00%



static inline void trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
				       unsigned int len)
{
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
20
100.00%
3
100.00%
Total
20
100.00%
3
100.00%



static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
{
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
20
95.24%
1
50.00%
Al Viro
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%

#endif /* CONFIG_TRACING */

#endif /* _LINUX_TRACE_SEQ_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Steven Rostedt
519
95.58%
11
68.75%
Joe Perches
10
1.84%
1
6.25%
Johannes Berg
8
1.47%
1
6.25%
Wu Zhangjin
3
0.55%
1
6.25%
Al Viro
2
0.37%
1
6.25%
Jiri Olsa
1
0.18%
1
6.25%
Total
543
100.00%
16
100.00%
Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.