TRACEME() helper for oprofile

[akaros.git] / kern / include / devfs.h

diff --git a/kern/include/devfs.h b/kern/include/devfs.h
index 6979fc5..67ebc28 100644 (file)
--- a/kern/include/devfs.h
+++ b/kern/include/devfs.h
@@ -3,16 +3,25 @@
  * See LICENSE for details.
  *
  * Devfs: filesystem interfaces to devices.  For now, we just create the
- * needed/discovered devices in KFS in its /dev/ folder. */
+ * needed/discovered devices in KFS in its /dev/ folder.  In the future, we
+ * might want to do something like nodes like other Unixes. */
 
 #ifndef ROS_KERN_DEVFS_H
 #define ROS_KERN_DEVFS_H
 
 #include <vfs.h>
+#include <kfs.h>
 
 void devfs_init(void);
+struct file *make_device(char *path, int mode, int type,
+                         struct file_operations *fop);
 
-/* Exporting these for convenience */
+/* Generic device (block or char) file ops.  Both of these are dummies that say
+ * the device can't support the operation. */
+int dev_mmap(struct file *file, struct vm_region *vmr);
+int dev_c_llseek(struct file *file, off64_t offset, off64_t *ret, int whence);
+
+/* Exporting these for convenience (process creation) */
 extern struct file *dev_stdin, *dev_stdout, *dev_stderr;
 
 #endif /* !ROS_KERN_DEVFS_H */