From: Linus Torvalds <torvalds@linux-foundation.org>
To: Kent Overstreet <kent.overstreet@linux.dev>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-bcachefs@vger.kernel.org, djwong@kernel.org,
dchinner@redhat.com, sandeen@redhat.com, willy@infradead.org,
josef@toxicpanda.com, tytso@mit.edu, bfoster@redhat.com,
jack@suse.cz, andreas.gruenbacher@gmail.com, brauner@kernel.org,
peterz@infradead.org, akpm@linux-foundation.org,
dhowells@redhat.com, snitzer@kernel.org, axboe@kernel.dk
Subject: Re: [GIT PULL] bcachefs
Date: Thu, 10 Aug 2023 11:09:31 -0700 [thread overview]
Message-ID: <CAHk-=wh6R1z=6v+qJpe7qAZGNYZK1ZMs1+dhD7FahVywnMr1Uw@mail.gmail.com> (raw)
In-Reply-To: <20230810180244.cx3vouaqtisklttn@moria.home.lan>
On Thu, 10 Aug 2023 at 11:02, Kent Overstreet <kent.overstreet@linux.dev> wrote:
>
> When using sget() in the conventional way it's not possible for
> FMODE_EXCL to protect against concurrent opens scribbling over each
> other because we open the block device before checking if it's already
> mounted, and we expect that open to succeed.
So? Read-only operations. Don't write to anything until after you then
have verified your exclusive status.
If you think you need to be exclusive to other people opening the
device for other things, just stop expecting to control the whole
world.
Linus
next prev parent reply other threads:[~2023-08-10 18:09 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-26 21:46 [GIT PULL] bcachefs Kent Overstreet
2023-06-26 23:11 ` Jens Axboe
2023-06-27 0:06 ` Kent Overstreet
2023-06-27 1:13 ` Jens Axboe
2023-06-27 2:05 ` Kent Overstreet
2023-06-27 2:59 ` Jens Axboe
2023-06-27 3:10 ` Kent Overstreet
2023-06-27 17:16 ` Jens Axboe
2023-06-27 20:15 ` Kent Overstreet
2023-06-27 22:05 ` Dave Chinner
2023-06-27 22:41 ` Kent Overstreet
2023-06-28 14:40 ` Jens Axboe
2023-06-28 14:48 ` Thomas Weißschuh
2023-06-28 14:58 ` Jens Axboe
2023-06-28 3:16 ` Jens Axboe
2023-06-28 4:01 ` Kent Overstreet
2023-06-28 14:58 ` Jens Axboe
2023-06-28 15:22 ` Jens Axboe
2023-06-28 17:56 ` Kent Overstreet
2023-06-28 20:45 ` Jens Axboe
2023-06-28 16:57 ` Jens Axboe
2023-06-28 17:33 ` Christian Brauner
2023-06-28 17:52 ` Kent Overstreet
2023-06-28 20:44 ` Jens Axboe
2023-06-28 21:17 ` Jens Axboe
2023-06-28 22:13 ` Kent Overstreet
2023-06-28 22:33 ` Jens Axboe
2023-06-28 22:55 ` Kent Overstreet
2023-06-28 23:14 ` Jens Axboe
2023-06-28 23:50 ` Kent Overstreet
2023-06-29 1:00 ` Dave Chinner
2023-06-29 1:33 ` Jens Axboe
2023-06-29 11:18 ` Christian Brauner
2023-06-29 14:17 ` Kent Overstreet
2023-06-29 15:31 ` Kent Overstreet
2023-06-30 9:40 ` Christian Brauner
2023-07-06 15:20 ` Kent Overstreet
2023-07-06 16:26 ` Jens Axboe
2023-07-06 16:34 ` Kent Overstreet
2023-06-29 1:29 ` Jens Axboe
2023-07-06 20:15 ` Kent Overstreet
2023-06-28 17:54 ` Kent Overstreet
2023-06-28 20:54 ` Jens Axboe
2023-06-28 22:14 ` Jens Axboe
2023-06-28 23:04 ` Kent Overstreet
2023-06-28 23:11 ` Jens Axboe
2023-06-27 2:33 ` Kent Overstreet
2023-06-27 2:59 ` Jens Axboe
2023-06-27 3:19 ` Matthew Wilcox
2023-06-27 3:22 ` Kent Overstreet
2023-06-27 3:52 ` Christoph Hellwig
2023-06-27 4:36 ` Kent Overstreet
2023-07-06 15:56 ` Kent Overstreet
2023-07-06 16:40 ` Josef Bacik
2023-07-06 17:38 ` Kent Overstreet
2023-07-06 19:17 ` Eric Sandeen
2023-07-06 19:31 ` Kent Overstreet
2023-07-06 21:19 ` Darrick J. Wong
2023-07-06 22:43 ` Kent Overstreet
2023-07-07 13:13 ` Jan Kara
2023-07-07 13:52 ` Kent Overstreet
2023-07-07 8:48 ` Christian Brauner
2023-07-07 9:18 ` Kent Overstreet
2023-07-07 16:26 ` James Bottomley
2023-07-07 16:48 ` Kent Overstreet
2023-07-07 17:04 ` James Bottomley
2023-07-07 17:26 ` Kent Overstreet
2023-07-08 3:54 ` Matthew Wilcox
2023-07-08 4:10 ` Kent Overstreet
2023-07-08 4:31 ` Kent Overstreet
2023-07-08 15:02 ` Theodore Ts'o
2023-07-08 15:23 ` Kent Overstreet
2023-07-08 16:42 ` James Bottomley
2023-07-09 1:16 ` Kent Overstreet
2023-07-07 9:35 ` Kent Overstreet
2023-07-07 2:04 ` Theodore Ts'o
2023-07-07 12:18 ` Brian Foster
2023-07-07 14:49 ` Kent Overstreet
2023-07-12 2:54 ` Kent Overstreet
2023-07-12 19:48 ` Kees Cook
2023-07-12 19:57 ` Kent Overstreet
2023-07-12 22:10 ` Darrick J. Wong
2023-07-12 23:57 ` Kent Overstreet
2023-08-09 1:27 ` Linus Torvalds
2023-08-10 15:54 ` Kent Overstreet
2023-08-10 16:40 ` Linus Torvalds
2023-08-10 18:02 ` Kent Overstreet
2023-08-10 18:09 ` Linus Torvalds [this message]
2023-08-10 17:52 ` Jan Kara
2023-08-11 2:47 ` Kent Overstreet
2023-08-11 8:10 ` Jan Kara
2023-08-11 8:13 ` Christian Brauner
2023-08-10 22:39 ` Darrick J. Wong
2023-08-10 23:47 ` Linus Torvalds
2023-08-11 2:40 ` Jens Axboe
2023-08-11 4:03 ` Kent Overstreet
2023-08-11 5:20 ` Linus Torvalds
2023-08-11 5:29 ` Kent Overstreet
2023-08-11 5:53 ` Linus Torvalds
2023-08-11 7:52 ` Christian Brauner
2023-08-11 14:31 ` Jens Axboe
2023-08-11 3:45 ` Kent Overstreet
2023-08-21 0:09 ` Dave Chinner
2023-08-10 23:07 ` Matthew Wilcox
2023-08-11 10:54 ` Christian Brauner
2023-08-11 12:58 ` Kent Overstreet
2023-08-14 7:25 ` Christian Brauner
2023-08-14 15:23 ` Kent Overstreet
2023-08-11 13:21 ` Kent Overstreet
2023-08-11 22:56 ` Darrick J. Wong
2023-08-14 7:21 ` Christian Brauner
2023-08-14 15:27 ` Kent Overstreet
2023-09-03 3:25 Kent Overstreet
2023-09-05 13:24 ` Christoph Hellwig
2023-09-06 0:00 ` Kent Overstreet
2023-09-06 0:41 ` Matthew Wilcox
2023-09-06 16:10 ` Kent Overstreet
2023-09-06 17:57 ` Darrick J. Wong
2023-09-08 9:37 ` Christoph Hellwig
2023-09-06 19:36 ` Linus Torvalds
2023-09-06 20:02 ` Linus Torvalds
2023-09-06 20:20 ` Linus Torvalds
2023-09-06 21:55 ` Arnaldo Carvalho de Melo
2023-09-06 23:13 ` David Sterba
2023-09-06 23:34 ` Linus Torvalds
2023-09-06 23:46 ` Arnaldo Carvalho de Melo
2023-09-06 23:53 ` Arnaldo Carvalho de Melo
2023-09-06 23:16 ` Linus Torvalds
2023-09-10 0:53 ` Kent Overstreet
2023-09-07 20:37 ` Kent Overstreet
2023-09-07 20:51 ` Linus Torvalds
2023-09-07 23:40 ` Kent Overstreet
2023-09-08 6:29 ` Martin Steigerwald
2023-09-08 9:11 ` Joshua Ashton
2023-09-06 22:28 ` Nathan Chancellor
2023-09-07 0:03 ` Kees Cook
2023-09-07 14:29 ` Chris Mason
2023-09-07 20:39 ` Kent Overstreet
2023-09-08 10:50 ` Brian Foster
2023-09-08 23:05 ` Dave Chinner
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