From patchwork Fri Oct 13 15:56:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 735233 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 E46F7C46CA1 for ; Fri, 13 Oct 2023 15:59:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232554AbjJMP73 (ORCPT ); Fri, 13 Oct 2023 11:59:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232572AbjJMP7P (ORCPT ); Fri, 13 Oct 2023 11:59:15 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B16BBE0 for ; Fri, 13 Oct 2023 08:57:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697212671; 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=VdTOgUT9KIMzQnxrll+Ln7vU3lh7L6xf921vj9gXc+g=; b=OCnqreGwMWekQPunXplYSSrmHUzzCHkmKnkUbanitA9pTN4jtbZ7ea4CQ5F4quGHYH0ZNW tWBwhojm1NPNzj6HY/0039l8wWS8bsHTP10TBr4Adqwpp/MXWLy5SotIS8pZTTiJVgy67v 9TR9tWPg31tvxwctf1FASr1XKZnJlJg= 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-690-sPJ3XQAXMnmyAp7uFZgrmw-1; Fri, 13 Oct 2023 11:57:43 -0400 X-MC-Unique: sPJ3XQAXMnmyAp7uFZgrmw-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (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 591821029F45; Fri, 13 Oct 2023 15:57:42 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id B58C2492BD9; Fri, 13 Oct 2023 15:57:39 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Dominique Martinet , Ilya Dryomov , Christian Brauner , linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cachefs@redhat.com Subject: [RFC PATCH 03/53] netfs: Note nonblockingness in the netfs_io_request struct Date: Fri, 13 Oct 2023 16:56:36 +0100 Message-ID: <20231013155727.2217781-4-dhowells@redhat.com> In-Reply-To: <20231013155727.2217781-1-dhowells@redhat.com> References: <20231013155727.2217781-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Allow O_NONBLOCK to be noted in the netfs_io_request struct. Also add a flag, NETFS_RREQ_BLOCKED to record if we did block. Signed-off-by: David Howells cc: Jeff Layton cc: linux-cachefs@redhat.com cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/netfs/objects.c | 2 ++ include/linux/netfs.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/fs/netfs/objects.c b/fs/netfs/objects.c index 85f428fc52e6..e41f9fc9bdd2 100644 --- a/fs/netfs/objects.c +++ b/fs/netfs/objects.c @@ -37,6 +37,8 @@ struct netfs_io_request *netfs_alloc_request(struct address_space *mapping, INIT_LIST_HEAD(&rreq->subrequests); refcount_set(&rreq->ref, 1); __set_bit(NETFS_RREQ_IN_PROGRESS, &rreq->flags); + if (file && file->f_flags & O_NONBLOCK) + __set_bit(NETFS_RREQ_NONBLOCK, &rreq->flags); if (rreq->netfs_ops->init_request) { ret = rreq->netfs_ops->init_request(rreq, file); if (ret < 0) { diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 282511090ead..b92e982ac4a0 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -205,6 +205,8 @@ struct netfs_io_request { #define NETFS_RREQ_DONT_UNLOCK_FOLIOS 3 /* Don't unlock the folios on completion */ #define NETFS_RREQ_FAILED 4 /* The request failed */ #define NETFS_RREQ_IN_PROGRESS 5 /* Unlocked when the request completes */ +#define NETFS_RREQ_NONBLOCK 6 /* Don't block if possible (O_NONBLOCK) */ +#define NETFS_RREQ_BLOCKED 7 /* We blocked */ const struct netfs_request_ops *netfs_ops; };