Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/mon/mon_stat.c b/drivers/usb/mon/mon_stat.c
new file mode 100644
index 0000000..6e4b165
--- /dev/null
+++ b/drivers/usb/mon/mon_stat.c
@@ -0,0 +1,74 @@
+/*
+ * 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/usb.h>
+#include <asm/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;
+
+ if ((sp = kmalloc(sizeof(struct snap), GFP_KERNEL)) == NULL)
+ return -ENOMEM;
+
+ mbus = inode->u.generic_ip;
+
+ sp->slen = snprintf(sp->str, STAT_BUF_SIZE,
+ "nreaders %d text_lost %u\n",
+ mbus->nreaders, 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;
+ loff_t pos = *ppos;
+ int cnt;
+
+ if (pos < 0 || pos >= sp->slen)
+ return 0;
+ if (nbytes == 0)
+ return 0;
+ if ((cnt = sp->slen - pos) > nbytes)
+ cnt = nbytes;
+ if (copy_to_user(buf, sp->str + pos, cnt))
+ return -EFAULT;
+ *ppos = pos + cnt;
+ return cnt;
+}
+
+static int mon_stat_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+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, */
+ /* .ioctl = mon_stat_ioctl, */
+ .release = mon_stat_release,
+};