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#include <linux/module.h> /* Specifically, a module */
#include <linux/kernel.h> /* We're doing kernel work */
#include <linux/proc_fs.h> /* Necessary because we use the proc fs */
#include <asm/uaccess.h> /* for copy_from_user */
#include <linux/slab.h>
#define PROC_MAX_SIZE 64
struct bench_t{
const char *name;
const int size;
char *buffer;
};
#define PROC_NAME "benchMark"
static struct bench_t bench_name[] = {
[0] = {
.name = "fps",
.size = 64,
},
[1] = {
.name = "boot_time",
.size = 64,
},
[2] = {
.name = "net_time",
.size = 512,
},
[3] = {
.name = "cam_time",
.size = 64,
},
[4] = {
.name = "app_launch_time",
.size = 64,
},
[5] = {
.name = "tpdown_time",
.size = 64,
},
[6] = {
.name = "app_launch_data",
.size = 1024,
},
[7] = {
.name = "presshome_time", /*zero mean not pressed hHOME key, after update gohome_time, write zero to it*/
.size = 64,
},
[8] = {
.name = "gohome_time",
.size = 64,
},
};
static struct proc_dir_entry *benchmark_entry;
/* The buffer used to store character for this module */
static int benchmark_open(struct inode *inode, struct file *file);
static ssize_t benchmark_read( struct file *file, char __user *buffer, size_t len, loff_t *offset);
static ssize_t benchmark_write( struct file *file, const char __user *buffer, size_t len, loff_t *offset );
static const struct file_operations benchmark_fops = {
.owner = THIS_MODULE,
.read = benchmark_read,
.open = benchmark_open,
.write = benchmark_write,
.release = NULL,
};
/* This function is called when the module is loaded */
int init_module()
{
int i;
struct proc_dir_entry *entry;
benchmark_entry = proc_mkdir(PROC_NAME,NULL);
if (!benchmark_entry) {
printk(KERN_ALERT "Error: Could not initialize /proc/%s\n",PROC_NAME);
return -ENOMEM;
}
for (i=0; i<ARRAY_SIZE(bench_name); i++) {
entry = proc_create_data(bench_name[i].name, S_IRUGO|S_IWUGO, benchmark_entry, &benchmark_fops, bench_name[i].name);
bench_name[i].buffer = (char*)kmalloc(bench_name[i].size, GFP_KERNEL);
memset(bench_name[i].buffer, '\0', bench_name[i].size);
}
printk(KERN_INFO "/proc/%s created\n", PROC_NAME);
return 0;
}
static int benchmark_open(struct inode *inode, struct file *file)
{
int i = 0;
char *name = PDE_DATA(inode);
for (i = 0; i < ARRAY_SIZE(bench_name); i++) {
if (!strcmp(name, bench_name[i].name))
{
file->private_data = (void*)i;
return 0;
}
}
return -1;
}
static ssize_t benchmark_read( struct file *file, char __user *buffer, size_t len, loff_t *offset)
{
int idx = (int)file->private_data;
return simple_read_from_buffer(buffer, len, offset, bench_name[idx].buffer,bench_name[idx].size);
}
static ssize_t benchmark_write( struct file *file, const char __user *buffer, size_t len, loff_t *offset )
{
int idx = (int)file->private_data;
int ret = 0;
memset(bench_name[idx].buffer, '\0', bench_name[idx].size);
ret = simple_write_to_buffer(bench_name[idx].buffer, bench_name[idx].size, offset, buffer, len);
return ret;
}
void cleanup_module()
{
int i;
for (i=0; i < ARRAY_SIZE(bench_name); i++) {
remove_proc_entry(bench_name[i].name, benchmark_entry);
kfree(bench_name[i].buffer);
}
remove_proc_entry(PROC_NAME, NULL);
printk(KERN_INFO "/proc/%s removed\n", PROC_NAME);
}
device_initcall(init_module);
MODULE_DESCRIPTION("BENCH MARK PROC");
MODULE_LICENSE("GPL");
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