Re: [PATCH 1/4] iov_iter: add copy_to_iter_full()

Al Viro
2024-04-09T17:06:46Z

On Tue, Apr 09, 2024 at 09:22:15AM -0600, Jens Axboe wrote:
> Add variant of copy_to_iter() that either copies the full amount asked
> for and return success, or ensures that the iov_iter is back to where
> it started on failure and returns false.

FWIW, see git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.iov_iter

There was an open-coded instance (skb_copy_linear()) that I'd converted to
that helper in the same commit; I can split it, of course, but I don't
see much point in that.