From patchwork Wed Aug 14 20:38:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13763940 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 28D491D416D for ; Wed, 14 Aug 2024 20:40:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723668014; cv=none; b=jDPVRPF9yJ/StBQ2ykIkgR5JYFmEdQ++1A2a3W5kikjiPfygtVJ9eydBCwFA+NOVJ+ux73ZxBgZy9B3nv2uoqK69zObYu2w6bAtci9INCqiC5YZJ4czxKaUoqEomt1XBPFoXUvrSB+Dm/MBmwlfwcu1go1WIAnra8R0kpy3sBa8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723668014; c=relaxed/simple; bh=gN/uhOgzLK4FiZe7gRprQlF9swk2M89zT7vCFfFie08=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AYLa8don407ceYz1C8iiEAzi9oHTkyPN0ym73qdgtChu7OqndXU9XpBmfLReVKGiHd0+KRY8JBLOhJMDK+EMyFQV1sSiGev0OCuI6KN5Yp3Lj627emr2ivvcamb8ICfllYDeUgBG7tBBw4kCuyz2VY/txX2qi6/NUGiLhaW/wTY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=gyAR4Sub; arc=none smtp.client-ip=170.10.129.124 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="gyAR4Sub" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723668012; 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=5ILxAt7NrlTMl997Ic8qQaZjEltu0gIkdcefwxoaQ6I=; b=gyAR4SubZfBZnAjycN5SqOKk9EYYPwHn9QPXZt+cnEzViVY8gAFk1QP/VqR6jJWSN0Bmaf KGVhpnkDz013uQLZ8whUbKHsRHYLX72BVp8+RpqL+2W1d1mthOfhAWKN69KG37OTeac9FT ak0wCEAgYecaSLJQ1pRC5/uPR+MyyuE= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-533-TmxqWq9ANiW1IsbBOq97nA-1; Wed, 14 Aug 2024 16:40:07 -0400 X-MC-Unique: TmxqWq9ANiW1IsbBOq97nA-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 75755195609E; Wed, 14 Aug 2024 20:40:04 +0000 (UTC) Received: from warthog.procyon.org.uk.com (unknown [10.42.28.30]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 917E219560A3; Wed, 14 Aug 2024 20:39:58 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French , Matthew Wilcox Cc: David Howells , Jeff Layton , Gao Xiang , Dominique Martinet , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, 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-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 08/25] netfs: Reserve netfs_sreq_source 0 as unset/unknown Date: Wed, 14 Aug 2024 21:38:28 +0100 Message-ID: <20240814203850.2240469-9-dhowells@redhat.com> In-Reply-To: <20240814203850.2240469-1-dhowells@redhat.com> References: <20240814203850.2240469-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Reserve the 0-valued netfs_sreq_source to mean unset or unknown so that it can be seen in the trace as such rather than appearing as download-from-server when it's going to get switched to something else. Signed-off-by: David Howells cc: Jeff Layton cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- include/linux/netfs.h | 1 + include/trace/events/netfs.h | 1 + 2 files changed, 2 insertions(+) diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 11fa86640d91..16834751e646 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -43,6 +43,7 @@ static inline void folio_start_private_2(struct folio *folio) #define NETFS_BUF_PAGECACHE_MARK XA_MARK_1 /* - Page needs wb/dirty flag wrangling */ enum netfs_io_source { + NETFS_SOURCE_UNKNOWN, NETFS_FILL_WITH_ZEROES, NETFS_DOWNLOAD_FROM_SERVER, NETFS_READ_FROM_CACHE, diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h index a4fd5dea52f4..f4105b8e5894 100644 --- a/include/trace/events/netfs.h +++ b/include/trace/events/netfs.h @@ -60,6 +60,7 @@ E_(netfs_rreq_trace_write_done, "WR-DONE") #define netfs_sreq_sources \ + EM(NETFS_SOURCE_UNKNOWN, "----") \ EM(NETFS_FILL_WITH_ZEROES, "ZERO") \ EM(NETFS_DOWNLOAD_FROM_SERVER, "DOWN") \ EM(NETFS_READ_FROM_CACHE, "READ") \