From: Matthew Wilcox <willy@infradead.org>
To: stsp <stsp2@yandex.ru>
Cc: Jeff Layton <jlayton@kernel.org>,
linux-kernel@vger.kernel.org,
Chuck Lever <chuck.lever@oracle.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 2/3] fd/locks: allow get the lock owner by F_OFD_GETLK
Date: Tue, 20 Jun 2023 15:36:20 +0100 [thread overview]
Message-ID: <ZJG5ZOK8HKl/eWmM@casper.infradead.org> (raw)
In-Reply-To: <cb88d464-30d8-810e-f3c4-35432d12a32d@yandex.ru>
On Tue, Jun 20, 2023 at 06:47:31PM +0500, stsp wrote:
>
> 20.06.2023 18:46, Matthew Wilcox пишет:
> > On Tue, Jun 20, 2023 at 06:39:07PM +0500, stsp wrote:
> > > Though it will, for sure, represent the
> > > task that _owns_ the lock.
> > No, it *DOESN'T*. I can open a file, SCM_RIGHTS pass it to another task
> > and then exit. Now the only owner of that lock is the recipient ...
> Won't I get the recipient's pid in an
> l_pid then?
You snipped the part where I pointed out that at times there can be
_no_ task that owns it. open a fd, set the lock, pass the fd to another
task, exit. until that task calls recvmsg(), no task owns it.
next prev parent reply other threads:[~2023-06-20 14:36 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-20 9:55 [PATCH 0/3] RFC: F_OFD_GETLK should provide more info Stas Sergeev
2023-06-20 9:55 ` [PATCH 1/3] fs/locks: F_UNLCK extension for F_OFD_GETLK Stas Sergeev
2023-06-20 10:46 ` Jeff Layton
2023-06-20 11:00 ` stsp
2023-06-20 11:15 ` Jeff Layton
2023-06-21 15:24 ` stsp
2023-06-20 9:55 ` [PATCH 2/3] fd/locks: allow get the lock owner by F_OFD_GETLK Stas Sergeev
2023-06-20 10:51 ` Jeff Layton
2023-06-20 10:57 ` stsp
2023-06-20 11:12 ` Jeff Layton
2023-06-20 11:45 ` stsp
2023-06-20 12:02 ` Jeff Layton
2023-06-20 12:34 ` stsp
2023-06-20 13:19 ` Jeff Layton
2023-06-20 13:39 ` stsp
2023-06-20 13:46 ` Matthew Wilcox
2023-06-20 13:47 ` stsp
2023-06-20 14:36 ` Matthew Wilcox [this message]
2023-06-20 15:45 ` stsp
2023-06-20 17:05 ` Matthew Wilcox
2023-06-21 2:54 ` stsp
2023-06-23 13:10 ` David Laight
2023-06-20 13:58 ` Jeff Layton
2023-06-21 6:57 ` stsp
2023-06-21 10:35 ` Jeff Layton
2023-06-21 10:42 ` stsp
2023-06-21 11:05 ` Jeff Layton
2023-06-21 11:22 ` stsp
2023-06-21 11:26 ` stsp
2023-06-23 15:25 ` Christian Brauner
2023-06-23 17:18 ` stsp
2023-06-27 16:00 ` Jeff Layton
2023-06-27 16:20 ` stsp
2023-06-20 9:55 ` [PATCH 3/3] selftests: add OFD lock tests Stas Sergeev
2023-06-20 11:06 ` Jeff Layton
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