Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Pete Zaitcev |
210 |
82.03% |
2 |
16.67% |
| Lei Ming |
20 |
7.81% |
1 |
8.33% |
| Akinobu Mita |
11 |
4.30% |
1 |
8.33% |
| Greg Kroah-Hartman |
5 |
1.95% |
2 |
16.67% |
| Paul Gortmaker |
3 |
1.17% |
1 |
8.33% |
| Tejun Heo |
3 |
1.17% |
1 |
8.33% |
| Luiz Fernando N. Capitulino |
1 |
0.39% |
1 |
8.33% |
| Theodore Y. Ts'o |
1 |
0.39% |
1 |
8.33% |
| Linus Torvalds |
1 |
0.39% |
1 |
8.33% |
| Arnd Bergmann |
1 |
0.39% |
1 |
8.33% |
| Total |
256 |
|
12 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* The USB Monitor, inspired by Dave Harding's USBMon.
*
* This is the 's' or 'stat' reader which debugs usbmon itself.
* Note that this code blows through locks, so make sure that
* /dbg/usbmon/0s is well protected from non-root users.
*
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/usb.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include "usb_mon.h"
#define STAT_BUF_SIZE 80
struct snap {
int slen;
char str[STAT_BUF_SIZE];
};
static int mon_stat_open(struct inode *inode, struct file *file)
{
struct mon_bus *mbus;
struct snap *sp;
sp = kmalloc(sizeof(struct snap), GFP_KERNEL);
if (sp == NULL)
return -ENOMEM;
mbus = inode->i_private;
sp->slen = snprintf(sp->str, STAT_BUF_SIZE,
"nreaders %d events %u text_lost %u\n",
mbus->nreaders, mbus->cnt_events, mbus->cnt_text_lost);
file->private_data = sp;
return 0;
}
static ssize_t mon_stat_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *ppos)
{
struct snap *sp = file->private_data;
return simple_read_from_buffer(buf, nbytes, ppos, sp->str, sp->slen);
}
static int mon_stat_release(struct inode *inode, struct file *file)
{
struct snap *sp = file->private_data;
file->private_data = NULL;
kfree(sp);
return 0;
}
const struct file_operations mon_fops_stat = {
.owner = THIS_MODULE,
.open = mon_stat_open,
.llseek = no_llseek,
.read = mon_stat_read,
/* .write = mon_stat_write, */
/* .poll = mon_stat_poll, */
/* .unlocked_ioctl = mon_stat_ioctl, */
.release = mon_stat_release,
};