linux-kernel - Re: [PATCH 1/2] fs: anon_inodes: export anon_inode_getfile

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Message-ID: <YKU3KWn4ZnRSyyFY@infradead.org>
Date:   Wed, 19 May 2021 17:04:57 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Kumar Kartikeya Dwivedi <memxor@...il.com>
Cc:     io-uring@...r.kernel.org, Pavel Emelyanov <xemul@...nvz.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>,
        Pavel Begunkov <asml.silence@...il.com>,
        Lokesh Gidra <lokeshgidra@...gle.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Paul Moore <paul@...l-moore.com>,
        Daniel Colascione <dancol@...gle.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH  1/2] fs: anon_inodes: export anon_inode_getfile_secure
 helper

On Wed, May 19, 2021 at 05:00:56PM +0530, Kumar Kartikeya Dwivedi wrote:
> This is the non-fd installing analogue of anon_inode_getfd_secure. In
> addition to allowing LSMs to attach policy to the distinct inode, this
> is also needed for checkpoint restore of an io_uring instance where a
> mapped region needs to mapped back to the io_uring fd by CRIU. This is
> currently not possible as all anon_inodes share a single inode.

No need to export it, as io_uring can't be built modular.

> +struct file *anon_inode_getfile_secure(const char *name,
> +				       const struct file_operations *fops,
> +				       void *priv, int flags,
> +				       const struct inode *context_inode)
> +{
> +	return __anon_inode_getfile(name, fops, priv, flags, context_inode, true);
> +}
> +EXPORT_SYMBOL_GPL(anon_inode_getfile_secure);

Please avoid the overly long line here.