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Commit 9e790bd6 authored by Jeff Layton's avatar Jeff Layton Committed by Al Viro
Browse files

vfs: add a flags argument to user_path_parent 



...so we can pass in LOOKUP_REVAL. For now, nothing does yet.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 442e31ca

fs/namei.c

+10 −6
Original line number Diff line number Diff line
@@ -2175,15 +2175,19 @@ int user_path_at(int dfd, const char __user *name, unsigned flags, 
 *     path-walking is complete.

 */

static struct filename *

user_path_parent(int dfd, const char __user *path, struct nameidata *nd)

user_path_parent(int dfd, const char __user *path, struct nameidata *nd,

		 unsigned int flags)

{

	struct filename *s = getname(path);

	int error;



	/* only LOOKUP_REVAL is allowed in extra flags */

	flags &= LOOKUP_REVAL;



	if (IS_ERR(s))

		return s;



	error = filename_lookup(dfd, s, LOOKUP_PARENT, nd);

	error = filename_lookup(dfd, s, flags | LOOKUP_PARENT, nd);

	if (error) {

		putname(s);

		return ERR_PTR(error);
@@ -3336,7 +3340,7 @@ static long do_rmdir(int dfd, const char __user *pathname) 
	struct dentry *dentry;

	struct nameidata nd;



	name = user_path_parent(dfd, pathname, &nd);

	name = user_path_parent(dfd, pathname, &nd, 0);

	if (IS_ERR(name))

		return PTR_ERR(name);
@@ -3432,7 +3436,7 @@ static long do_unlinkat(int dfd, const char __user *pathname) 
	struct nameidata nd;

	struct inode *inode = NULL;



	name = user_path_parent(dfd, pathname, &nd);

	name = user_path_parent(dfd, pathname, &nd, 0);

	if (IS_ERR(name))

		return PTR_ERR(name);
@@ -3827,13 +3831,13 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname, 
	struct filename *to;

	int error;



	from = user_path_parent(olddfd, oldname, &oldnd);

	from = user_path_parent(olddfd, oldname, &oldnd, 0);

	if (IS_ERR(from)) {

		error = PTR_ERR(from);

		goto exit;

	}



	to = user_path_parent(newdfd, newname, &newnd);

	to = user_path_parent(newdfd, newname, &newnd, 0);

	if (IS_ERR(to)) {

		error = PTR_ERR(to);

		goto exit1;