void oprofile_create_stats_files(struct super_block * sb, struct dentry * root)
{
struct oprofile_cpu_buffer * cpu_buf;
struct dentry * cpudir;
struct dentry * dir;
char buf[10];
int i;
dir = oprofilefs_mkdir(sb, root, "stats");
if (!dir)
return;
for_each_cpu(i) {
cpu_buf = &cpu_buffer[i];
snprintf(buf, 10, "cpu%d", i);
cpudir = oprofilefs_mkdir(sb, dir, buf);
/* Strictly speaking access to these ulongs is racy,
* but we can't simply lock them, and they are
* informational only.
*/
oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
&cpu_buf->sample_received);
oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
&cpu_buf->sample_lost_overflow);
}
oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
&oprofile_stats.sample_lost_no_mm);
oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
&oprofile_stats.sample_lost_no_mapping);
oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
&oprofile_stats.event_lost_overflow);
}
static int oprofile_create_hwsampling_files(struct super_block *sb,
struct dentry *root)
{
struct dentry *hw_dir;
/* reinitialize default values */
hwsampler_file = 1;
hw_dir = oprofilefs_mkdir(sb, root, "hwsampling");
if (!hw_dir)
return -EINVAL;
oprofilefs_create_file(sb, hw_dir, "hwsampler", &hwsampler_fops);
oprofilefs_create_ulong(sb, hw_dir, "hw_interval",
&oprofile_hw_interval);
oprofilefs_create_ro_ulong(sb, hw_dir, "hw_min_interval",
&oprofile_min_interval);
oprofilefs_create_ro_ulong(sb, hw_dir, "hw_max_interval",
&oprofile_max_interval);
oprofilefs_create_ulong(sb, hw_dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
return 0;
}
static int oprofile_create_hwsampling_files(struct dentry *root)
{
struct dentry *dir;
dir = oprofilefs_mkdir(root, "timer");
if (!dir)
return -EINVAL;
oprofilefs_create_file(dir, "enabled", &timer_enabled_fops);
if (!hwsampler_available)
return 0;
/* reinitialize default values */
hwsampler_enabled = 1;
counter_config.kernel = 1;
counter_config.user = 1;
if (!force_cpu_type) {
/*
* Create the counter file system. A single virtual
* counter is created which can be used to
* enable/disable hardware sampling dynamically from
* user space. The user space will configure a single
* counter with a single event. The value of 'event'
* and 'unit_mask' are not evaluated by the kernel code
* and can only be set to 0.
*/
dir = oprofilefs_mkdir(root, "0");
if (!dir)
return -EINVAL;
oprofilefs_create_file(dir, "enabled", &hwsampler_fops);
oprofilefs_create_file(dir, "event", &zero_fops);
oprofilefs_create_file(dir, "count", &hw_interval_fops);
oprofilefs_create_file(dir, "unit_mask", &zero_fops);
oprofilefs_create_file(dir, "kernel", &kernel_fops);
oprofilefs_create_file(dir, "user", &user_fops);
oprofilefs_create_ulong(dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
} else {
/*
* Hardware sampling can be used but the cpu_type is
* forced to timer in order to deal with legacy user
* space tools. The /dev/oprofile/hwsampling fs is
* provided in that case.
*/
dir = oprofilefs_mkdir(root, "hwsampling");
if (!dir)
return -EINVAL;
oprofilefs_create_file(dir, "hwsampler",
&hwsampler_fops);
oprofilefs_create_file(dir, "hw_interval",
&hw_interval_fops);
oprofilefs_create_ro_ulong(dir, "hw_min_interval",
&oprofile_min_interval);
oprofilefs_create_ro_ulong(dir, "hw_max_interval",
&oprofile_max_interval);
oprofilefs_create_ulong(dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
}
return 0;
}
