1 files changed, 32 insertions, 3 deletions

diff --git a/include/linux/file.h b/include/linux/file.h
index a22408b..cbacf4f 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -26,15 +26,44 @@ static inline void fput_light(struct file *file, int fput_needed)
 		fput(file);
 }
 
+struct fd {
+	struct file *file;
+	int need_put;
+};
+
+static inline void fdput(struct fd fd)
+{
+	if (fd.need_put)
+		fput(fd.file);
+}
+
 extern struct file *fget(unsigned int fd);
 extern struct file *fget_light(unsigned int fd, int *fput_needed);
+
+static inline struct fd fdget(unsigned int fd)
+{
+	int b;
+	struct file *f = fget_light(fd, &b);
+	return (struct fd){f,b};
+}
+
 extern struct file *fget_raw(unsigned int fd);
 extern struct file *fget_raw_light(unsigned int fd, int *fput_needed);
+
+static inline struct fd fdget_raw(unsigned int fd)
+{
+	int b;
+	struct file *f = fget_raw_light(fd, &b);
+	return (struct fd){f,b};
+}
+
+extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
+extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
 extern void set_close_on_exec(unsigned int fd, int flag);
+extern bool get_close_on_exec(unsigned int fd);
 extern void put_filp(struct file *);
-extern int alloc_fd(unsigned start, unsigned flags);
-extern int get_unused_fd(void);
-#define get_unused_fd_flags(flags) alloc_fd(0, (flags))
+extern int get_unused_fd_flags(unsigned flags);
+#define get_unused_fd() get_unused_fd_flags(0)
 extern void put_unused_fd(unsigned int fd);
 
 extern void fd_install(unsigned int fd, struct file *file);