From patchwork Fri Oct 13 16:03:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13421146 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 466BBCDB482 for ; Fri, 13 Oct 2023 16:04:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CB8746B00B0; Fri, 13 Oct 2023 12:04:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C685D6B00AA; Fri, 13 Oct 2023 12:04:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC53A6B00B3; Fri, 13 Oct 2023 12:04:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 9367F6B00AA for ; Fri, 13 Oct 2023 12:04:53 -0400 (EDT) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 31F4FC0370 for ; Fri, 13 Oct 2023 16:04:53 +0000 (UTC) X-FDA: 81340911666.04.7A758F2 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf14.hostedemail.com (Postfix) with ESMTP id BE7C210002D for ; Fri, 13 Oct 2023 16:04:50 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=F9DVC78R; spf=pass (imf14.hostedemail.com: domain of dhowells@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=dhowells@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1697213091; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=VdTOgUT9KIMzQnxrll+Ln7vU3lh7L6xf921vj9gXc+g=; b=Kc/h8bwIV3/SQ2sE3/+isDQTz/DYgk6Q7rARggqeYshd2vdx4/7wgiwP9TdbrKpBr7dHcw VNRHu+MPLh2N/+PnADPj53BMQKVR/ipPMI8BifWjw997jBtkoMH/BMqJTpJcqNbAg0oC9J E2eMHz4FuEpIfRkM9wCOPC/AZZk0JhU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1697213091; a=rsa-sha256; cv=none; b=P3BzBQ9f7O+Aguyw+g9Tt2/KKVm6gd9BZwmgo7+EdCq8WFdUUKPlqhRq0IfGOlx1eyZgWY VoF9+eJ5DKQ+xth1uPYlfCxKjb1yQwQNhc8Fxf30WQHh+9oeX7QrTfbW9E2AcAZs5IVRw9 8TybXMEXaJxOfhe6CiAdahVwHMmxP7k= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=F9DVC78R; spf=pass (imf14.hostedemail.com: domain of dhowells@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=dhowells@redhat.com; dmarc=pass (policy=none) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697213090; 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=F9DVC78RlM10fe245vf6s0+2n869LOaNPfkaP5EppaIqUji7RrCN33gy/cHV2EwzXc1xqg oZxfKKqIjR7rAGEUqoiNN7VOOkBRks+awr4W+jLVYZESd+eOrMgmBSHrGmAOem/zt9zRuD DTOSgoNgDA23nJLBo4sHm5eTfjq0t68= 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-649-lniRQbNTMuOczg5-kXAeJA-1; Fri, 13 Oct 2023 12:04:38 -0400 X-MC-Unique: lniRQbNTMuOczg5-kXAeJA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (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 CA0C288B7A6; Fri, 13 Oct 2023 16:04:37 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1F13CC15BBC; Fri, 13 Oct 2023 16:04:35 +0000 (UTC) From: David Howells To: Jeff Layton , Steve French Cc: David Howells , Matthew Wilcox , Marc Dionne , Paulo Alcantara , 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 17:03:32 +0100 Message-ID: <20231013160423.2218093-4-dhowells@redhat.com> In-Reply-To: <20231013160423.2218093-1-dhowells@redhat.com> References: <20231013160423.2218093-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 X-Rspamd-Queue-Id: BE7C210002D X-Rspam-User: X-Stat-Signature: ye919u3kebb8fnxx13sagniq3ypntapg X-Rspamd-Server: rspam03 X-HE-Tag: 1697213090-785310 X-HE-Meta: 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 yV3/+9x1 9ThOM6XMy1Q3Ufxi6P78mNDUsU4UHcgRZfYkTSRO9hUrpkqcJ6CN7zazit1M5ixZV4UpjsPEm2q5BMysXOHsaNdCmN0bjFUvzknjPSAlhjun+9ozsK+pYQrOZITeOKQbL3lFb4btPSsdqJa2R1kBXrpL2GCr0eAjkmkTmrvjwp28zZ6seFDqDkZvs0gjSu2js9HgwUQQVbteNw3nyuR65FlBgb4sxdCUq302CwsaDXUeQj+6vxH0RujhAOHfXk1j4N/p82wyhj/xXBNc27bFbXEt3o9wsnZWppvRmXhXiNoCsxFxdCtjYF+xKPZMzAHeRWJQaThOuu4tnAc2CYf6JNPYkdA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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; };