[PATCH v21 036/100] c/r: introduce vfs_fcntl()

[Oren Laadan <orenl@cs.columbia.edu>]

This patch introduces vfs_fcntl() so that it can be called from
restart (see patch adding restart of files).

Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Oren Laadan <orenl@cs.columbia.edu>
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Serge E. Hallyn <serue@us.ibm.com>
---
 fs/fcntl.c         |   21 +++++++++++++--------
 include/linux/fs.h |    2 ++
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 452d02f..2079af0 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -418,6 +418,18 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
 	return err;
 }
 
+int vfs_fcntl(int fd, unsigned int cmd, unsigned long arg, struct file *filp)
+{
+	int err;
+
+	err = security_file_fcntl(filp, cmd, arg);
+	if (err)
+		goto out;
+	err = do_fcntl(fd, cmd, arg, filp);
+ out:
+	return err;
+}
+
 SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
 {	
 	struct file *filp;
@@ -427,14 +439,7 @@ SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
 	if (!filp)
 		goto out;
 
-	err = security_file_fcntl(filp, cmd, arg);
-	if (err) {
-		fput(filp);
-		return err;
-	}
-
-	err = do_fcntl(fd, cmd, arg, filp);
-
+	err = vfs_fcntl(fd, cmd, arg, filp);
  	fput(filp);
 out:
 	return err;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9e8b171..65ffe9c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1096,6 +1096,8 @@ struct file_lock {
 
 #include <linux/fcntl.h>
 
+extern int vfs_fcntl(int fd, unsigned cmd, unsigned long arg, struct file *fp);
+
 extern void send_sigio(struct fown_struct *fown, int fd, int band);
 
 #ifdef CONFIG_FILE_LOCKING
-- 
1.6.3.3