From patchwork Thu Jun 22 16:52:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: stsp X-Patchwork-Id: 13289432 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11196EB64DD for ; Thu, 22 Jun 2023 16:54:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231529AbjFVQxg (ORCPT ); Thu, 22 Jun 2023 12:53:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231465AbjFVQxC (ORCPT ); Thu, 22 Jun 2023 12:53:02 -0400 Received: from forward100c.mail.yandex.net (forward100c.mail.yandex.net [178.154.239.211]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4E9210D; Thu, 22 Jun 2023 09:53:00 -0700 (PDT) Received: from mail-nwsmtp-smtp-production-main-39.sas.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-39.sas.yp-c.yandex.net [IPv6:2a02:6b8:c08:2087:0:640:7bf5:0]) by forward100c.mail.yandex.net (Yandex) with ESMTP id E1C5C600A6; Thu, 22 Jun 2023 19:52:58 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-39.sas.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id kqJAlpLDeKo0-Yux8647Y; Thu, 22 Jun 2023 19:52:58 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1687452778; bh=b93M/kd7RtP0LNT+znv3PSo9p5SOOzFeXYgHQxmwv9I=; h=Message-Id:Date:In-Reply-To:Cc:Subject:References:To:From; b=pw9vkkfjeG7hR2ziEEn7ezSdAdQd1GZRddpnZWxGipXv2Szk9UACc3EslkeEgEv/E xpHc8yjiiNPoWf3pcJZGIZLrjEnutadOLRA+jeHwIe1F3y4CkU24kPaejvYDM0u5IF H7l6CO4WQlEBibwIa7RnUNt2taP9LR0eAMJNcEpo= Authentication-Results: mail-nwsmtp-smtp-production-main-39.sas.yp-c.yandex.net; dkim=pass header.i=@yandex.ru From: Stas Sergeev To: linux-kernel@vger.kernel.org Cc: Stas Sergeev , Jeff Layton , Chuck Lever , Alexander Viro , Christian Brauner , linux-fsdevel@vger.kernel.org, Shuah Khan , linux-kselftest@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH] fcntl.2: document F_UNLCK F_OFD_GETLK extension Date: Thu, 22 Jun 2023 21:52:25 +0500 Message-Id: <20230622165225.2772076-4-stsp2@yandex.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230622165225.2772076-1-stsp2@yandex.ru> References: <20230622165225.2772076-1-stsp2@yandex.ru> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org F_UNLCK has the special meaning when used as a lock type on input. It returns the information about any lock found in the specified region on that particular file descriptor. Locks on other file descriptors are ignored by F_UNLCK. Signed-off-by: Stas Sergeev CC: Jeff Layton CC: Chuck Lever CC: Alexander Viro CC: Christian Brauner CC: linux-fsdevel@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: Shuah Khan CC: linux-kselftest@vger.kernel.org CC: linux-api@vger.kernel.org --- man2/fcntl.2 | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/man2/fcntl.2 b/man2/fcntl.2 index 7b5604e3a..e3e3e7b8c 100644 --- a/man2/fcntl.2 +++ b/man2/fcntl.2 @@ -604,6 +604,13 @@ then details about one of these locks are returned via .IR lock , as described above for .BR F_GETLK . +.B F_UNLCK +has the special meaning when put into +.I l_type +as an input. It returns the information about any lock in the specified +range on that particular file descriptor. The locks on other file +descriptors are ignored by +.BR F_UNLCK . .PP In the current implementation, .\" commit 57b65325fe34ec4c917bc4e555144b4a94d9e1f7