Patch "vfs: add vfs_select_inode() helper" has been added to the 4.4-stable tree

Patch "vfs: add vfs_select_inode() helper" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    vfs: add vfs_select_inode() helper

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     vfs-add-vfs_select_inode-helper.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 54d5ca871e72f2bb172ec9323497f01cd5091ec7 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 11 May 2016 01:16:37 +0200
Subject: vfs: add vfs_select_inode() helper

From: Miklos Szeredi <mszeredi@redhat.com>

commit 54d5ca871e72f2bb172ec9323497f01cd5091ec7 upstream.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/open.c              |   12 ++++--------
 include/linux/dcache.h |   12 ++++++++++++
 2 files changed, 16 insertions(+), 8 deletions(-)

--- a/fs/open.c
+++ b/fs/open.c
@@ -840,16 +840,12 @@ EXPORT_SYMBOL(file_path);
 int vfs_open(const struct path *path, struct file *file,
 	     const struct cred *cred)
 {
-	struct dentry *dentry = path->dentry;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = vfs_select_inode(path->dentry, file->f_flags);
 
-	file->f_path = *path;
-	if (dentry->d_flags & DCACHE_OP_SELECT_INODE) {
-		inode = dentry->d_op->d_select_inode(dentry, file->f_flags);
-		if (IS_ERR(inode))
-			return PTR_ERR(inode);
-	}
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
 
+	file->f_path = *path;
 	return do_dentry_open(file, inode, NULL, cred);
 }
 
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -592,4 +592,16 @@ static inline struct dentry *d_real(stru
 		return dentry;
 }
 
+static inline struct inode *vfs_select_inode(struct dentry *dentry,
+					     unsigned open_flags)
+{
+	struct inode *inode = d_inode(dentry);
+
+	if (inode && unlikely(dentry->d_flags & DCACHE_OP_SELECT_INODE))
+		inode = dentry->d_op->d_select_inode(dentry, open_flags);
+
+	return inode;
+}
+
+
 #endif	/* __LINUX_DCACHE_H */


Patches currently in stable-queue which might be from mszeredi@redhat.com are

queue-4.4/vfs-rename-check-backing-inode-being-equal.patch
queue-4.4/vfs-add-vfs_select_inode-helper.patch
queue-4.4/atomic_open-fix-the-handling-of-create_error.patch