linux-kernel - Re: [PATCH 2/3] fd/locks: allow get the lock owner by F_OFD

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Message-ID: <f6fea0d2-2def-8f6b-9c53-f1199ebf95f6@yandex.ru>
Date:   Wed, 21 Jun 2023 16:26:14 +0500
From:   stsp <stsp2@...dex.ru>
To:     Jeff Layton <jlayton@...nel.org>, linux-kernel@...r.kernel.org
Cc:     Chuck Lever <chuck.lever@...cle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        linux-fsdevel@...r.kernel.org, Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH 2/3] fd/locks: allow get the lock owner by F_OFD_GETLK


21.06.2023 16:22, stsp пишет:
>
> 21.06.2023 16:05, Jeff Layton пишет:
>> Yes. Ambiguous answers are worse than none at all.
>
> But same for read locks, when you
> query them with F_OFD_GETLK.
> It doesn't sound ambiguous to me,
> you get the valid owner, and you can
> iterate them if you kill them in a
> process (same as for read locks).
And in fact, no, you can't iterate the
read locks *unless* you use pid to
kill its owners! :) So this way you can
actually iterate the read locks, but
not in a most convenient way. :)