ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/usb/mon/mon_stat.c b/marvell/linux/drivers/usb/mon/mon_stat.c
new file mode 100644
index 0000000..98ab0cc
--- /dev/null
+++ b/marvell/linux/drivers/usb/mon/mon_stat.c
@@ -0,0 +1,71 @@
+// 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,
+};