1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * tracefs.h - a pseudo file system for activating tracing 4 * 5 * Based on debugfs by: 2004 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * Copyright (C) 2014 Red Hat Inc, author: Steven Rostedt <srostedt@redhat.com> 8 * 9 * tracefs is the file system that is used by the tracing infrastructure. 10 */ 11 12 #ifndef _TRACEFS_H_ 13 #define _TRACEFS_H_ 14 15 #include <linux/fs.h> 16 #include <linux/seq_file.h> 17 18 #include <linux/types.h> 19 20 struct file_operations; 21 22 #ifdef CONFIG_TRACING 23 24 struct eventfs_file; 25 26 struct dentry *eventfs_create_events_dir(const char *name, 27 struct dentry *parent); 28 29 struct eventfs_file *eventfs_add_subsystem_dir(const char *name, 30 struct dentry *parent); 31 32 struct eventfs_file *eventfs_add_dir(const char *name, 33 struct eventfs_file *ef_parent); 34 35 int eventfs_add_file(const char *name, umode_t mode, 36 struct eventfs_file *ef_parent, void *data, 37 const struct file_operations *fops); 38 39 int eventfs_add_events_file(const char *name, umode_t mode, 40 struct dentry *parent, void *data, 41 const struct file_operations *fops); 42 43 void eventfs_remove(struct eventfs_file *ef); 44 45 void eventfs_remove_events_dir(struct dentry *dentry); 46 47 struct dentry *tracefs_create_file(const char *name, umode_t mode, 48 struct dentry *parent, void *data, 49 const struct file_operations *fops); 50 51 struct dentry *tracefs_create_dir(const char *name, struct dentry *parent); 52 53 void tracefs_remove(struct dentry *dentry); 54 55 struct dentry *tracefs_create_instance_dir(const char *name, struct dentry *parent, 56 int (*mkdir)(const char *name), 57 int (*rmdir)(const char *name)); 58 59 bool tracefs_initialized(void); 60 61 #endif /* CONFIG_TRACING */ 62 63 #endif 64
