From: Linus Torvalds <torvalds@linux-foundation.org>
To: Josef Bacik <josef@toxicpanda.com>
Cc: Omar Sandoval <osandov@osandov.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-btrfs <linux-btrfs@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Christoph Hellwig <hch@infradead.org>,
Dave Chinner <david@fromorbit.com>, Jann Horn <jannh@google.com>,
Amir Goldstein <amir73il@gmail.com>,
Aleksa Sarai <cyphar@cyphar.com>,
Linux API <linux-api@vger.kernel.org>,
Kernel Team <kernel-team@fb.com>
Subject: Re: [PATCH v8 00/10] fs: interface for directly reading/writing compressed data
Date: Fri, 19 Mar 2021 13:08:05 -0700 [thread overview]
Message-ID: <CAHk-=wj6MjPt+V7VrQ=muspc0DZ-7bg5bvmE2ZF-1Ea_AQh8Xg@mail.gmail.com> (raw)
In-Reply-To: <8f741746-fd7f-c81a-3cdf-fb81aeea34b5@toxicpanda.com>
On Fri, Mar 19, 2021 at 11:21 AM Josef Bacik <josef@toxicpanda.com> wrote:
>
> Can we get some movement on this? Omar is sort of spinning his wheels here
> trying to get this stuff merged, no major changes have been done in a few
> postings.
I'm not Al, and I absolutely detest the IOCB_ENCODED thing, and want
more explanations of why this should be done that way, and pollute our
iov_iter handling EVEN MORE.
Our iov_iter stuff isn't the most legible, and I don't understand why
anybody would ever think it's a good idea to spread what is clearly a
"struct" inside multiple different iov extents.
Honestly, this sounds way more like an ioctl interface than
read/write. We've done that before.
But if it has to be done with an iov_iter, is there *any* reason to
not make it be a hard rule that iov[0] should not be the entirely of
the struct, and the code shouldn't ever need to iterate?
Also I see references to the man-page, but honestly, that's not how
the kernel UAPI should be defined ("just read the man-page"), plus I
refuse to live in the 70's, and consider troff to be an atrocious
format.
So make the UAPI explanation for this horror be in a legible format
that is actually part of the kernel so that I can read what the intent
is, instead of having to decode hieroglypics.
Linus
next prev parent reply other threads:[~2021-03-19 20:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 19:42 [PATCH v8 00/10] fs: interface for directly reading/writing compressed data Omar Sandoval
2021-03-16 19:42 ` [PATCH man-pages v8] Document encoded I/O Omar Sandoval
2021-03-16 19:42 ` [PATCH v8 01/10] iov_iter: add copy_struct_from_iter() Omar Sandoval
2021-03-17 17:56 ` Christian Brauner
2021-03-17 18:45 ` Omar Sandoval
2021-03-20 10:04 ` Christian Brauner
2021-03-16 19:42 ` [PATCH v8 02/10] fs: add O_ALLOW_ENCODED open flag Omar Sandoval
2021-03-16 19:42 ` [PATCH v8 03/10] fs: add RWF_ENCODED for reading/writing compressed data Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 04/10] btrfs: fix check_data_csum() error message for direct I/O Omar Sandoval
2021-03-17 11:21 ` Qu Wenruo
2021-03-17 18:33 ` Omar Sandoval
2021-03-17 23:47 ` Qu Wenruo
2021-03-18 20:25 ` David Sterba
2021-03-16 19:43 ` [PATCH v8 05/10] btrfs: don't advance offset for compressed bios in btrfs_csum_one_bio() Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 06/10] btrfs: add ram_bytes and offset to btrfs_ordered_extent Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 07/10] btrfs: support different disk extent size for delalloc Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 08/10] btrfs: optionally extend i_size in cow_file_range_inline() Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 09/10] btrfs: implement RWF_ENCODED reads Omar Sandoval
2021-03-16 19:43 ` [PATCH v8 10/10] btrfs: implement RWF_ENCODED writes Omar Sandoval
2021-03-19 18:21 ` [PATCH v8 00/10] fs: interface for directly reading/writing compressed data Josef Bacik
2021-03-19 20:08 ` Linus Torvalds [this message]
2021-03-19 20:12 ` Josef Bacik
2021-03-19 20:27 ` Omar Sandoval
2021-03-19 20:43 ` Christian Brauner
2021-03-19 20:55 ` Linus Torvalds
2021-03-19 21:11 ` Omar Sandoval
2021-03-19 21:47 ` Linus Torvalds
2021-03-19 22:46 ` Omar Sandoval
2021-03-20 0:31 ` Linus Torvalds
2021-03-20 20:39 ` Omar Sandoval
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