linux-kernel - Re: [PATCH v5 1/4] rust: uaccess: add userspace pointers

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Message-ID: <CAH5fLgj9xt9RnohE1fbLfWBAHv47AgwzrMf8cWZO4hEYC2Mnkw@mail.gmail.com>
Date: Sun, 21 Apr 2024 20:37:38 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: David Laight <David.Laight@...lab.com>
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Subject: Re: [PATCH v5 1/4] rust: uaccess: add userspace pointers

On Sun, Apr 21, 2024 at 8:08 PM David Laight <David.Laight@...lab.com> wrote:
>
> Should you be implementing 'struct iov_iter' ?
>
> Even if it means creating an IO_UBUF for ioctls?
> (Although that might take some 'fettling' for read+write for ioctls.)

That seems to be intended for when you have several chunks of memory
in userspace that you want to treat as one contiguous chunk. That's
not something I need in the Android Binder driver.

Alice