From a2eec8ee15eeabb3c1d32dd9fe4571b1369246dd Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Mon, 8 Nov 1999 03:25:23 +0000
Subject: [PATCH] Create a fileops fo_stat() entry point.  This will enable
 collection of a bunch of duplicated code that breaks (read: panic) when a new
 file type is added and some switch/case entries are missed.

---
 sys/sys/file.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/sys/sys/file.h b/sys/sys/file.h
index 47557d40661..014a2931b67 100644
--- a/sys/sys/file.h
+++ b/sys/sys/file.h
@@ -45,6 +45,7 @@
 #ifdef KERNEL
 #include <sys/queue.h>
 
+struct stat;
 struct proc;
 struct uio;
 
@@ -75,6 +76,8 @@ struct file {
 					    caddr_t data, struct proc *p));
 		int	(*fo_poll)	__P((struct file *fp, int events,
 					    struct ucred *cred, struct proc *p));
+		int	(*fo_stat)	__P((struct file *fp, struct stat *sb,
+					    struct proc *p));
 		int	(*fo_close)	__P((struct file *fp, struct proc *p));
 	} *f_ops;
 	int	f_seqcount;	/*
@@ -119,6 +122,8 @@ static __inline int fo_ioctl __P((struct file *fp, u_long com, caddr_t data,
     struct proc *p));
 static __inline int fo_poll __P((struct file *fp, int events,
     struct ucred *cred, struct proc *p));
+static __inline int fo_stat __P((struct file *fp, struct stat *sb,
+    struct proc *p));
 static __inline int fo_close __P((struct file *fp, struct proc *p));
 
 static __inline int
@@ -183,6 +188,20 @@ fo_poll(fp, events, cred, p)
 	return (error);
 }
 
+static __inline int
+fo_stat(fp, sb, p)
+	struct file *fp;
+	struct stat *sb;
+	struct proc *p;
+{
+	int error;
+
+	fhold(fp);
+	error = (*fp->f_ops->fo_stat)(fp, sb, p);
+	fdrop(fp, p);
+	return (error);
+}
+
 static __inline int
 fo_close(fp, p)
 	struct file *fp;