linux-kernel - Re: [PATCHSET 0/2] Fix splice from random/urandom

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Message-ID: <03c7d6c9-0c86-d4b6-357d-d51be0143c80@kernel.dk>
Date:   Thu, 19 May 2022 17:57:04 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     Theodore Ts'o <tytso@....edu>, Christoph Hellwig <hch@....de>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHSET 0/2] Fix splice from random/urandom

On 5/19/22 5:27 PM, Jason A. Donenfeld wrote:
> Hi Jens,
> 
> On Fri, May 20, 2022 at 1:25 AM Jens Axboe <axboe@...nel.dk> wrote:
>> I'll leave that to you :-)
> 
> Alright, I'll have a look. Which one do I want here? This series adds
> splice_read/splice_write. The new thing would be sendpage? Or
> copy_file_range? Or something else?

For copying kernel memory? It's really the same thing, you just
initialize the iter as an ITER_KVEC instead. The nice thing about the
iov_iter iterator that it then hides that for you, call the same copy
in/out helpers for it.

-- 
Jens Axboe