vfs: do_last(): check LOOKUP_DIRECTORY

Check for ENOTDIR before finishing open.  This allows this code to be shared
between O_CREAT and plain opens.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namei.c b/fs/namei.c
index a7e994b..4767c05 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2386,6 +2386,9 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
        error = -EISDIR;
        if (S_ISDIR(nd->inode->i_mode))
                goto exit;
+       error = -ENOTDIR;
+       if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
+               goto exit;
 ok:
        if (!S_ISREG(nd->inode->i_mode))
                will_truncate = 0;