create_pipe_files(): switch the first allocation to alloc_file_pseudo() (152b6372) · Commits · 戴 / test

fs/pipe.c

+8 −26

Original line number	Diff line number	Diff line
		@@ -744,32 +744,24 @@ fail_inode:

		int create_pipe_files(struct file **res, int flags)
		{
		int err;
		struct inode *inode = get_pipe_inode();
		struct file *f;
		struct path path;

		if (!inode)
		return -ENFILE;

		err = -ENOMEM;
		path.dentry = d_alloc_pseudo(pipe_mnt->mnt_sb, &empty_name);
		if (!path.dentry)
		goto err_inode;
		path.mnt = mntget(pipe_mnt);

		d_instantiate(path.dentry, inode);

		f = alloc_file(&path, O_WRONLY \| (flags & (O_NONBLOCK \| O_DIRECT)),
		f = alloc_file_pseudo(inode, pipe_mnt, "",
		O_WRONLY \| (flags & (O_NONBLOCK \| O_DIRECT)),
		&pipefifo_fops);
		if (IS_ERR(f)) {
		err = PTR_ERR(f);
		goto err_dentry;
		free_pipe_info(inode->i_pipe);
		iput(inode);
		return PTR_ERR(f);
		}

		f->private_data = inode->i_pipe;

		res[0] = alloc_file(&path, O_RDONLY \| (flags & O_NONBLOCK),
		res[0] = alloc_file(&f->f_path, O_RDONLY \| (flags & O_NONBLOCK),
		&pipefifo_fops);
		if (IS_ERR(res[0])) {
		put_pipe_info(inode, inode->i_pipe);
		@@ -777,20 +769,10 @@ int create_pipe_files(struct file **res, int flags)
		return PTR_ERR(res[0]);
		}

		path_get(&path);
		path_get(&f->f_path);
		res[0]->private_data = inode->i_pipe;
		res[1] = f;
		return 0;

		err_dentry:
		free_pipe_info(inode->i_pipe);
		path_put(&path);
		return err;

		err_inode:
		free_pipe_info(inode->i_pipe);
		iput(inode);
		return err;
		}

		static int __do_pipe_flags(int fd, struct file *files, int flags)