From 8737f3a1b3c6a38a2a064552d4536633a5a16cd3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 2 Aug 2008 22:36:57 -0400
Subject: [PATCH] [PATCH] get rid of path_lookup_create()

... and don't pass bogus flags when we are just looking for parent.
Fold __path_lookup_intent_open() into path_lookup_open() while we
are at it; that's the only remaining caller.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/namei.c | 61 ++++++++++++++++++++----------------------------------
 1 file changed, 22 insertions(+), 39 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 4a56f9b59e8..e584f04745b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1147,9 +1147,16 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
 
 }
 
-static int __path_lookup_intent_open(int dfd, const char *name,
-		unsigned int lookup_flags, struct nameidata *nd,
-		int open_flags, int create_mode)
+/**
+ * path_lookup_open - lookup a file path with open intent
+ * @dfd: the directory to use as base, or AT_FDCWD
+ * @name: pointer to file name
+ * @lookup_flags: lookup intent flags
+ * @nd: pointer to nameidata
+ * @open_flags: open intent flags
+ */
+int path_lookup_open(int dfd, const char *name, unsigned int lookup_flags,
+		struct nameidata *nd, int open_flags)
 {
 	struct file *filp = get_empty_filp();
 	int err;
@@ -1158,7 +1165,7 @@ static int __path_lookup_intent_open(int dfd, const char *name,
 		return -ENFILE;
 	nd->intent.open.file = filp;
 	nd->intent.open.flags = open_flags;
-	nd->intent.open.create_mode = create_mode;
+	nd->intent.open.create_mode = 0;
 	err = do_path_lookup(dfd, name, lookup_flags|LOOKUP_OPEN, nd);
 	if (IS_ERR(nd->intent.open.file)) {
 		if (err == 0) {
@@ -1170,38 +1177,6 @@ static int __path_lookup_intent_open(int dfd, const char *name,
 	return err;
 }
 
-/**
- * path_lookup_open - lookup a file path with open intent
- * @dfd: the directory to use as base, or AT_FDCWD
- * @name: pointer to file name
- * @lookup_flags: lookup intent flags
- * @nd: pointer to nameidata
- * @open_flags: open intent flags
- */
-int path_lookup_open(int dfd, const char *name, unsigned int lookup_flags,
-		struct nameidata *nd, int open_flags)
-{
-	return __path_lookup_intent_open(dfd, name, lookup_flags, nd,
-			open_flags, 0);
-}
-
-/**
- * path_lookup_create - lookup a file path with open + create intent
- * @dfd: the directory to use as base, or AT_FDCWD
- * @name: pointer to file name
- * @lookup_flags: lookup intent flags
- * @nd: pointer to nameidata
- * @open_flags: open intent flags
- * @create_mode: create intent flags
- */
-static int path_lookup_create(int dfd, const char *name,
-			      unsigned int lookup_flags, struct nameidata *nd,
-			      int open_flags, int create_mode)
-{
-	return __path_lookup_intent_open(dfd, name, lookup_flags|LOOKUP_CREATE,
-			nd, open_flags, create_mode);
-}
-
 static struct dentry *__lookup_hash(struct qstr *name,
 		struct dentry *base, struct nameidata *nd)
 {
@@ -1711,8 +1686,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
 	/*
 	 * Create - we need to know the parent.
 	 */
-	error = path_lookup_create(dfd, pathname, LOOKUP_PARENT,
-				   &nd, flag, mode);
+	error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd);
 	if (error)
 		return ERR_PTR(error);
 
@@ -1723,10 +1697,18 @@ struct file *do_filp_open(int dfd, const char *pathname,
 	 */
 	error = -EISDIR;
 	if (nd.last_type != LAST_NORM || nd.last.name[nd.last.len])
-		goto exit;
+		goto exit_parent;
 
+	error = -ENFILE;
+	filp = get_empty_filp();
+	if (filp == NULL)
+		goto exit_parent;
+	nd.intent.open.file = filp;
+	nd.intent.open.flags = flag;
+	nd.intent.open.create_mode = mode;
 	dir = nd.path.dentry;
 	nd.flags &= ~LOOKUP_PARENT;
+	nd.flags |= LOOKUP_CREATE | LOOKUP_OPEN;
 	mutex_lock(&dir->d_inode->i_mutex);
 	path.dentry = lookup_hash(&nd);
 	path.mnt = nd.path.mnt;
@@ -1831,6 +1813,7 @@ exit_dput:
 exit:
 	if (!IS_ERR(nd.intent.open.file))
 		release_open_intent(&nd);
+exit_parent:
 	path_put(&nd.path);
 	return ERR_PTR(error);
 
-- 
2.41.1