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: 13421336 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 EA2C61DA3D for ; Fri, 13 Oct 2023 16:04:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MBVOSlRF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697213093; 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=MBVOSlRFRH0LStgW2iMN5Cgk3KHPGY3hQRj8usAUHoo/bXgvgLER1KJkp0HnhG3eR6FcHM 0uLGXMHT7pTz2GjCgUN4ll2/nWAN2D+35jCn2AF4DtTkzvcVhuCsr592OOFfdBRWWrPqe2 bdBp8iWj3EdI/O//sZ0NCqGPOhQR5/U= 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> Precedence: bulk X-Mailing-List: v9fs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 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; };