Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/drivers/usb/mon/usb_mon.h b/drivers/usb/mon/usb_mon.h
new file mode 100644
index 000000000..aa64efaba
--- /dev/null
+++ b/drivers/usb/mon/usb_mon.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The USB Monitor, inspired by Dave Harding's USBMon.
+ *
+ * Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com)
+ */
+
+#ifndef __USB_MON_H
+#define __USB_MON_H
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/kref.h>
+/* #include <linux/usb.h> */	/* We use struct pointers only in this header */
+
+#define TAG "usbmon"
+
+struct mon_bus {
+	struct list_head bus_link;
+	spinlock_t lock;
+	struct usb_bus *u_bus;
+
+	int text_inited;
+	int bin_inited;
+	struct dentry *dent_s;		/* Debugging file */
+	struct dentry *dent_t;		/* Text interface file */
+	struct dentry *dent_u;		/* Second text interface file */
+	struct device *classdev;	/* Device in usbmon class */
+
+	/* Ref */
+	int nreaders;			/* Under mon_lock AND mbus->lock */
+	struct list_head r_list;	/* Chain of readers (usually one) */
+	struct kref ref;		/* Under mon_lock */
+
+	/* Stats */
+	unsigned int cnt_events;
+	unsigned int cnt_text_lost;
+};
+
+/*
+ * An instance of a process which opened a file (but can fork later)
+ */
+struct mon_reader {
+	struct list_head r_link;
+	struct mon_bus *m_bus;
+	void *r_data;		/* Use container_of instead? */
+
+	void (*rnf_submit)(void *data, struct urb *urb);
+	void (*rnf_error)(void *data, struct urb *urb, int error);
+	void (*rnf_complete)(void *data, struct urb *urb, int status);
+};
+
+void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
+void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
+
+struct mon_bus *mon_bus_lookup(unsigned int num);
+
+int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus);
+void mon_text_del(struct mon_bus *mbus);
+int /*bool*/ mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus);
+void mon_bin_del(struct mon_bus *mbus);
+
+int __init mon_text_init(void);
+void mon_text_exit(void);
+int __init mon_bin_init(void);
+void mon_bin_exit(void);
+
+/*
+ */
+extern struct mutex mon_lock;
+
+extern const struct file_operations mon_fops_stat;
+
+extern struct mon_bus mon_bus0;		/* Only for redundant checks */
+
+#endif /* __USB_MON_H */