linux-kernel - Re: [PATCH] fcntl.2: document F_UNLCK F_OFD

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Date:   Fri, 23 Jun 2023 15:07:43 +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, Shuah Khan <shuah@...nel.org>,
        linux-kselftest@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: [PATCH] fcntl.2: document F_UNLCK F_OFD_GETLK extension


22.06.2023 17:03, Jeff Layton пишет:
> We need to be pedantic for manpages. A "file description" is the
> representation of the open file in the kernel (basically, the "struct
> file" in the kernel). A file _descriptor_ is the numeric identifier
> returned by open() and similar functions.

OK.


> The locks are owned by the file description, so that would be the better
> term to use here. I think you want something like:
>
> "When the l_type is set to F_UNLCK, returned locks are limited to ones
> set on the given file description.
This is also inaccurate, because "limited"
implies other operations act widely.
But actually other operations do not
consider the "same fd" at all. So the
reported sets by F_UNLCK and other
ops do not overlap. Which is why I
decided to describe it as a "special
meaning".