From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2BC8163DF for ; Sun, 27 Aug 2023 13:32:54 +0000 (UTC) Received: from out-243.mta1.migadu.com (out-243.mta1.migadu.com [IPv6:2001:41d0:203:375::f3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B3A911C; Sun, 27 Aug 2023 06:32:46 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143164; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=Yw+5XvRr3vDIU02wPbTBy+P7Vb3r5vANDo9ahLXEToHmV4GE1+GjTI2/FiGvzS/72CcLGE wNMghjMXDTPCiQyUzrxQFpeftIBQyMH0jGDsayXuE4xMGusaZd0pBKhpckAeDFF1jY1yin IKCCEyk0xEU76DQXzGM7PUWjnMG6kt0= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Cc: Dominique Martinet , Pavel Begunkov , Christian Brauner , Alexander Viro , Stefan Roesch , Clay Harris , Dave Chinner , "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cachefs@redhat.com, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, codalist@coda.cs.cmu.edu, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-nilfs@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, Wanpeng Li Subject: [PATCH 04/11] vfs: add a vfs helper for io_uring file pos lock Date: Sun, 27 Aug 2023 21:28:28 +0800 Message-Id: <20230827132835.1373581-5-hao.xu@linux.dev> In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Hao Xu Add a vfs helper file_pos_lock_nowait() for io_uring usage. The function have conditional nowait logic, i.e. if nowait is needed, return -EAGAIN when trylock fails. Signed-off-by: Hao Xu --- fs/file.c | 13 +++++++++++++ include/linux/file.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/fs/file.c b/fs/file.c index 35c62b54c9d6..8e5c38f5db52 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1053,6 +1053,19 @@ void __f_unlock_pos(struct file *f) mutex_unlock(&f->f_pos_lock); } +int file_pos_lock_nowait(struct file *file, bool nowait) +{ + if (!(file->f_mode & FMODE_ATOMIC_POS)) + return 0; + + if (!nowait) + mutex_lock(&file->f_pos_lock); + else if (!mutex_trylock(&file->f_pos_lock)) + return -EAGAIN; + + return 1; +} + /* * We only lock f_pos if we have threads or if the file might be * shared with another process. In both cases we'll have an elevated diff --git a/include/linux/file.h b/include/linux/file.h index 6e9099d29343..bcc6ba0aec50 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f) fdput(f); } +extern int file_pos_lock_nowait(struct file *file, bool nowait); + DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd) extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 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 us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0321AC83F38 for ; Tue, 29 Aug 2023 08:41:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1693298479; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=/cSRRg+pmjMThnSS9ipgjyQIj7fZYM4+RSE0qKPmdz4=; b=gOEAIwdiLDv/rPFa8jCTBSCNOzArppl1Ug6iGmVbhcWFGA7sZqH89GaACvrRipRsJ1hvrG YxCroVIVEUET2Fqi9I9Ca1d0rZUB5bzvUjv9DqCU5/fdjUc37zMNdnGQd4Q5uAcEG8uy/x PPallDQ+V5wlzyxXoRQbs4gGLUPnigo= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-612-BBwDQe6jMXmULnYXgZNCFw-1; Tue, 29 Aug 2023 04:41:13 -0400 X-MC-Unique: BBwDQe6jMXmULnYXgZNCFw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4F5E718F0277; Tue, 29 Aug 2023 08:41:11 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com [10.30.29.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id 442991121319; Tue, 29 Aug 2023 08:41:11 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (localhost [IPv6:::1]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id D78ED1946A52; Tue, 29 Aug 2023 08:41:10 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id 783C019465A8 for ; Sun, 27 Aug 2023 13:32:48 +0000 (UTC) Received: by smtp.corp.redhat.com (Postfix) id 45C98492C14; Sun, 27 Aug 2023 13:32:48 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3E1D5492C13 for ; Sun, 27 Aug 2023 13:32:48 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1BD24857A84 for ; Sun, 27 Aug 2023 13:32:48 +0000 (UTC) Received: from out-242.mta1.migadu.com (out-242.mta1.migadu.com [95.215.58.242]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-349-0gbgKLy3MiiZ2AeZ90iUig-1; Sun, 27 Aug 2023 09:32:46 -0400 X-MC-Unique: 0gbgKLy3MiiZ2AeZ90iUig-1 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Date: Sun, 27 Aug 2023 21:28:28 +0800 Message-Id: <20230827132835.1373581-5-hao.xu@linux.dev> In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 X-Mailman-Approved-At: Tue, 29 Aug 2023 08:41:07 +0000 Subject: [Cluster-devel] [PATCH 04/11] vfs: add a vfs helper for io_uring file pos lock X-BeenThere: cluster-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: "\[Cluster devel\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wanpeng Li , "Darrick J . Wong" , Dominique Martinet , Dave Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stefan Roesch , Clay Harris , linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, codalist@coda.cs.cmu.edu, cluster-devel@redhat.com, linux-cachefs@redhat.com, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-block@vger.kernel.org, Alexander Viro , Christian Brauner , netdev@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, bpf@vger.kernel.org, Pavel Begunkov , linux-btrfs@vger.kernel.org Errors-To: cluster-devel-bounces@redhat.com Sender: "Cluster-devel" X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="US-ASCII"; x-default=true From: Hao Xu Add a vfs helper file_pos_lock_nowait() for io_uring usage. The function have conditional nowait logic, i.e. if nowait is needed, return -EAGAIN when trylock fails. Signed-off-by: Hao Xu --- fs/file.c | 13 +++++++++++++ include/linux/file.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/fs/file.c b/fs/file.c index 35c62b54c9d6..8e5c38f5db52 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1053,6 +1053,19 @@ void __f_unlock_pos(struct file *f) =09mutex_unlock(&f->f_pos_lock); } =20 +int file_pos_lock_nowait(struct file *file, bool nowait) +{ +=09if (!(file->f_mode & FMODE_ATOMIC_POS)) +=09=09return 0; + +=09if (!nowait) +=09=09mutex_lock(&file->f_pos_lock); +=09else if (!mutex_trylock(&file->f_pos_lock)) +=09=09return -EAGAIN; + +=09return 1; +} + /* * We only lock f_pos if we have threads or if the file might be * shared with another process. In both cases we'll have an elevated diff --git a/include/linux/file.h b/include/linux/file.h index 6e9099d29343..bcc6ba0aec50 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f) =09fdput(f); } =20 +extern int file_pos_lock_nowait(struct file *file, bool nowait); + DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd) =20 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); --=20 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 54786C83F11 for ; Sun, 27 Aug 2023 13:32:57 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1qaFsu-0008Vc-82; Sun, 27 Aug 2023 13:32:56 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1qaFst-0008VT-65 for linux-f2fs-devel@lists.sourceforge.net; Sun, 27 Aug 2023 13:32:55 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=ffpwhn0FqZqO6YBgHLI2KFS6H4 13elcb7yk3sypQS0bKjZPTot2hjgGD6knz+QBkgI+8fb+3ZT4sFyGQWqqXGpk9mmhKIA06hfRR7/W c3qvDpk3XMtgRIVNRT1cUz/PfTEnztqyWCh7efFjX959L1Wjiddc+Y8V3NM26s61pjcQ=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=EBZwca2jEMHSL3/qYt6RTeChJQ wdD4c1xo1/tDdrNseUfJPJU2WSOeVrgi9qV6cjcgyj2eoB4Ai7Pa10GgMDWmBX2TosZOcZpAs1AJ/ C7S3J4mfTbxGJXio5uRnzyh71a9N1JxIaPTBtcrCjmB5UmIiXHPc0U0D37kcN1sY37jc=; Received: from out-252.mta1.migadu.com ([95.215.58.252]) by sfi-mx-1.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1qaFsp-00H3mv-KH for linux-f2fs-devel@lists.sourceforge.net; Sun, 27 Aug 2023 13:32:55 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143164; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=Yw+5XvRr3vDIU02wPbTBy+P7Vb3r5vANDo9ahLXEToHmV4GE1+GjTI2/FiGvzS/72CcLGE wNMghjMXDTPCiQyUzrxQFpeftIBQyMH0jGDsayXuE4xMGusaZd0pBKhpckAeDFF1jY1yin IKCCEyk0xEU76DQXzGM7PUWjnMG6kt0= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Date: Sun, 27 Aug 2023 21:28:28 +0800 Message-Id: <20230827132835.1373581-5-hao.xu@linux.dev> In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Headers-End: 1qaFsp-00H3mv-KH Subject: [f2fs-dev] [PATCH 04/11] vfs: add a vfs helper for io_uring file pos lock X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wanpeng Li , "Darrick J . Wong" , Dominique Martinet , Dave Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stefan Roesch , Clay Harris , linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, codalist@coda.cs.cmu.edu, cluster-devel@redhat.com, linux-cachefs@redhat.com, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-block@vger.kernel.org, Alexander Viro , Christian Brauner , netdev@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, bpf@vger.kernel.org, Pavel Begunkov , linux-btrfs@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Hao Xu Add a vfs helper file_pos_lock_nowait() for io_uring usage. The function have conditional nowait logic, i.e. if nowait is needed, return -EAGAIN when trylock fails. Signed-off-by: Hao Xu --- fs/file.c | 13 +++++++++++++ include/linux/file.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/fs/file.c b/fs/file.c index 35c62b54c9d6..8e5c38f5db52 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1053,6 +1053,19 @@ void __f_unlock_pos(struct file *f) mutex_unlock(&f->f_pos_lock); } +int file_pos_lock_nowait(struct file *file, bool nowait) +{ + if (!(file->f_mode & FMODE_ATOMIC_POS)) + return 0; + + if (!nowait) + mutex_lock(&file->f_pos_lock); + else if (!mutex_trylock(&file->f_pos_lock)) + return -EAGAIN; + + return 1; +} + /* * We only lock f_pos if we have threads or if the file might be * shared with another process. In both cases we'll have an elevated diff --git a/include/linux/file.h b/include/linux/file.h index 6e9099d29343..bcc6ba0aec50 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f) fdput(f); } +extern int file_pos_lock_nowait(struct file *file, bool nowait); + DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd) extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); -- 2.25.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hao Xu Subject: [PATCH 04/11] vfs: add a vfs helper for io_uring file pos lock Date: Sun, 27 Aug 2023 21:28:28 +0800 Message-ID: <20230827132835.1373581-5-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=ffpwhn0FqZqO6YBgHLI2KFS6H4 13elcb7yk3sypQS0bKjZPTot2hjgGD6knz+QBkgI+8fb+3ZT4sFyGQWqqXGpk9mmhKIA06hfRR7/W c3qvDpk3XMtgRIVNRT1cUz/PfTEnztqyWCh7efFjX959L1Wjiddc+Y8V3NM26s61pjcQ=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=EBZwca2jEMHSL3/qYt6RTeChJQ wdD4c1xo1/tDdrNseUfJPJU2WSOeVrgi9qV6cjcgyj2eoB4Ai7Pa10GgMDWmBX2TosZOcZpAs1AJ/ C7S3J4mfTbxGJXio5uRnzyh71a9N1JxIaPTBtcrCjmB5UmIiXHPc0U0D37kcN1sY37jc=; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143164; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=Yw+5XvRr3vDIU02wPbTBy+P7Vb3r5vANDo9ahLXEToHmV4GE1+GjTI2/FiGvzS/72CcLGE wNMghjMXDTPCiQyUzrxQFpeftIBQyMH0jGDsayXuE4xMGusaZd0pBKhpckAeDFF1jY1yin IKCCEyk0xEU76DQXzGM7PUWjnMG6kt0= In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: io-uring@vger.kernel.org, Jens Axboe Cc: Wanpeng Li , "Darrick J . Wong" , Dominique Martinet , Dave Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stefan Roesch , Clay Harris , linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, codalist@coda.cs.cmu.edu, cluster-devel@redhat.com, linux-cachefs@redhat.com, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-block@vger.kernel.org, Alexander Viro , Christian Brauner , netdev@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, bpf@vger.kernel.o From: Hao Xu Add a vfs helper file_pos_lock_nowait() for io_uring usage. The function have conditional nowait logic, i.e. if nowait is needed, return -EAGAIN when trylock fails. Signed-off-by: Hao Xu --- fs/file.c | 13 +++++++++++++ include/linux/file.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/fs/file.c b/fs/file.c index 35c62b54c9d6..8e5c38f5db52 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1053,6 +1053,19 @@ void __f_unlock_pos(struct file *f) mutex_unlock(&f->f_pos_lock); } +int file_pos_lock_nowait(struct file *file, bool nowait) +{ + if (!(file->f_mode & FMODE_ATOMIC_POS)) + return 0; + + if (!nowait) + mutex_lock(&file->f_pos_lock); + else if (!mutex_trylock(&file->f_pos_lock)) + return -EAGAIN; + + return 1; +} + /* * We only lock f_pos if we have threads or if the file might be * shared with another process. In both cases we'll have an elevated diff --git a/include/linux/file.h b/include/linux/file.h index 6e9099d29343..bcc6ba0aec50 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f) fdput(f); } +extern int file_pos_lock_nowait(struct file *file, bool nowait); + DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd) extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F2710C83F01 for ; Sun, 27 Aug 2023 13:32:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hm9sAW2FL0jBTTbCfsvxaE8ubCrAQ6CXtq4uXKbj+L4=; b=kupkmmzMZuPULw Ihgmja8BQPafxvms4r9ZXTr8VmSihYINj6jKjhTJldvVaxJ6+keVySx20MswQhTyeyUlKvCYaHVzf OlFnDWVHGAoT4CgHiMu3fbaQP2yZ7ZkiyYVRXWskfqR2GeZliMaBco2xe+5z8jHzFQMmWflxMVhOa iyboeIa3ccfUEuqhsbqEAPchK+8IU9+gKsY1JRi0nBPPZXOR5f8eXTz5pyTwuH8Ji7ukcT5kmZeGE /81+q7wn4qREhgwon1IIwN8AJwTPHmRxpahveA0fpflCDA5YRrrnDMqlvltyjH2K0YPMBa2uwTN+X CqFfnqjZBWHRY3gwI9LA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qaFso-0085kf-2D; Sun, 27 Aug 2023 13:32:50 +0000 Received: from out-248.mta1.migadu.com ([2001:41d0:203:375::f8]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qaFsm-0085jY-1R for linux-mtd@lists.infradead.org; Sun, 27 Aug 2023 13:32:49 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1693143164; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=W04QOWrrBuMFm18D/+g+MI2uZNnKBIsbwxq2wO1dKKw=; b=Yw+5XvRr3vDIU02wPbTBy+P7Vb3r5vANDo9ahLXEToHmV4GE1+GjTI2/FiGvzS/72CcLGE wNMghjMXDTPCiQyUzrxQFpeftIBQyMH0jGDsayXuE4xMGusaZd0pBKhpckAeDFF1jY1yin IKCCEyk0xEU76DQXzGM7PUWjnMG6kt0= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Cc: Dominique Martinet , Pavel Begunkov , Christian Brauner , Alexander Viro , Stefan Roesch , Clay Harris , Dave Chinner , "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cachefs@redhat.com, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, codalist@coda.cs.cmu.edu, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-nilfs@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, Wanpeng Li Subject: [PATCH 04/11] vfs: add a vfs helper for io_uring file pos lock Date: Sun, 27 Aug 2023 21:28:28 +0800 Message-Id: <20230827132835.1373581-5-hao.xu@linux.dev> In-Reply-To: <20230827132835.1373581-1-hao.xu@linux.dev> References: <20230827132835.1373581-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230827_063248_630358_60ACCA94 X-CRM114-Status: GOOD ( 10.81 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org From: Hao Xu Add a vfs helper file_pos_lock_nowait() for io_uring usage. The function have conditional nowait logic, i.e. if nowait is needed, return -EAGAIN when trylock fails. Signed-off-by: Hao Xu --- fs/file.c | 13 +++++++++++++ include/linux/file.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/fs/file.c b/fs/file.c index 35c62b54c9d6..8e5c38f5db52 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1053,6 +1053,19 @@ void __f_unlock_pos(struct file *f) mutex_unlock(&f->f_pos_lock); } +int file_pos_lock_nowait(struct file *file, bool nowait) +{ + if (!(file->f_mode & FMODE_ATOMIC_POS)) + return 0; + + if (!nowait) + mutex_lock(&file->f_pos_lock); + else if (!mutex_trylock(&file->f_pos_lock)) + return -EAGAIN; + + return 1; +} + /* * We only lock f_pos if we have threads or if the file might be * shared with another process. In both cases we'll have an elevated diff --git a/include/linux/file.h b/include/linux/file.h index 6e9099d29343..bcc6ba0aec50 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f) fdput(f); } +extern int file_pos_lock_nowait(struct file *file, bool nowait); + DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd) extern int f_dupfd(unsigned int from, struct file *file, unsigned flags); -- 2.25.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/