forked from luck/tmp_suning_uos_patched
136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/**
|
|
* @file oprofile_files.c
|
|
*
|
|
* @remark Copyright 2002 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author John Levon <levon@movementarian.org>
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/oprofile.h>
|
|
|
|
#include "event_buffer.h"
|
|
#include "oprofile_stats.h"
|
|
#include "oprof.h"
|
|
|
|
unsigned long fs_buffer_size = 131072;
|
|
unsigned long fs_cpu_buffer_size = 8192;
|
|
unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
|
|
|
|
static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
return oprofilefs_ulong_to_user(backtrace_depth, buf, count, offset);
|
|
}
|
|
|
|
|
|
static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
unsigned long val;
|
|
int retval;
|
|
|
|
if (*offset)
|
|
return -EINVAL;
|
|
|
|
retval = oprofilefs_ulong_from_user(&val, buf, count);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = oprofile_set_backtrace(val);
|
|
|
|
if (retval)
|
|
return retval;
|
|
return count;
|
|
}
|
|
|
|
|
|
static const struct file_operations depth_fops = {
|
|
.read = depth_read,
|
|
.write = depth_write
|
|
};
|
|
|
|
|
|
static ssize_t pointer_size_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
return oprofilefs_ulong_to_user(sizeof(void *), buf, count, offset);
|
|
}
|
|
|
|
|
|
static const struct file_operations pointer_size_fops = {
|
|
.read = pointer_size_read,
|
|
};
|
|
|
|
|
|
static ssize_t cpu_type_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
return oprofilefs_str_to_user(oprofile_ops.cpu_type, buf, count, offset);
|
|
}
|
|
|
|
|
|
static const struct file_operations cpu_type_fops = {
|
|
.read = cpu_type_read,
|
|
};
|
|
|
|
|
|
static ssize_t enable_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
return oprofilefs_ulong_to_user(oprofile_started, buf, count, offset);
|
|
}
|
|
|
|
|
|
static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
unsigned long val;
|
|
int retval;
|
|
|
|
if (*offset)
|
|
return -EINVAL;
|
|
|
|
retval = oprofilefs_ulong_from_user(&val, buf, count);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (val)
|
|
retval = oprofile_start();
|
|
else
|
|
oprofile_stop();
|
|
|
|
if (retval)
|
|
return retval;
|
|
return count;
|
|
}
|
|
|
|
|
|
static const struct file_operations enable_fops = {
|
|
.read = enable_read,
|
|
.write = enable_write,
|
|
};
|
|
|
|
|
|
static ssize_t dump_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
wake_up_buffer_waiter();
|
|
return count;
|
|
}
|
|
|
|
|
|
static const struct file_operations dump_fops = {
|
|
.write = dump_write,
|
|
};
|
|
|
|
void oprofile_create_files(struct super_block *sb, struct dentry *root)
|
|
{
|
|
oprofilefs_create_file(sb, root, "enable", &enable_fops);
|
|
oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666);
|
|
oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);
|
|
oprofilefs_create_ulong(sb, root, "buffer_size", &fs_buffer_size);
|
|
oprofilefs_create_ulong(sb, root, "buffer_watershed", &fs_buffer_watershed);
|
|
oprofilefs_create_ulong(sb, root, "cpu_buffer_size", &fs_cpu_buffer_size);
|
|
oprofilefs_create_file(sb, root, "cpu_type", &cpu_type_fops);
|
|
oprofilefs_create_file(sb, root, "backtrace_depth", &depth_fops);
|
|
oprofilefs_create_file(sb, root, "pointer_size", &pointer_size_fops);
|
|
oprofile_create_stats_files(sb, root);
|
|
if (oprofile_ops.create_files)
|
|
oprofile_ops.create_files(sb, root);
|
|
}
|