linux-kernel - [PATCH 05/21] vfs: lookup_open(): expand lookup

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Message-Id: <1338901832-14049-6-git-send-email-miklos@szeredi.hu>
Date:	Tue,  5 Jun 2012 15:10:16 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	viro@...IV.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	hch@...radead.org, torvalds@...ux-foundation.org,
	dhowells@...hat.com, mszeredi@...e.cz
Subject: [PATCH 05/21] vfs: lookup_open(): expand lookup_hash()

From: Miklos Szeredi <mszeredi@...e.cz>

Copy __lookup_hash() into lookup_open().  The next patch will insert the atomic
open call just before the real lookup.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
 fs/namei.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 1153476..cd20ddc 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2200,14 +2200,24 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
 				int *want_write, bool *created)
 {
 	struct dentry *dir = nd->path.dentry;
+	struct inode *dir_inode = dir->d_inode;
 	struct dentry *dentry;
 	int error;
+	bool need_lookup;
 
 	*created = false;
-	dentry = lookup_hash(nd);
+	dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
 	if (IS_ERR(dentry))
 		return ERR_CAST(dentry);
 
+	if (need_lookup) {
+		BUG_ON(dentry->d_inode);
+
+		dentry = lookup_real(dir_inode, dentry, nd);
+		if (IS_ERR(dentry))
+			return ERR_CAST(dentry);
+	}
+
 	/* Negative dentry, just create the file */
 	if (!dentry->d_inode && (op->open_flag & O_CREAT)) {
 		umode_t mode = op->mode;
-- 
1.7.7

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