From patchwork Tue Aug 20 23:20:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13770632 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.subspace.kernel.org (Postfix) with ESMTPS id 6380E1C8FD4 for ; Tue, 20 Aug 2024 23:21:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724196104; cv=none; b=YcafJ7IFGr6dhrYmrVAm1kChwI+VXct+tZWDQ+D3IpsHftWXRw9HrDEntlsiFyzANQ9f74ICKcplFFFo6nAnDyb+rYQHxneO+hsqBPeh7vU4W4RISGW/WhBZgClouWzWtGr8k8M8EkV6V/ONdv3VWIB53G/jC6Lc9o2OMvmrA6I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724196104; c=relaxed/simple; bh=ht8EIVhw2/1il8Rsom6afgUGDhA62o/6wQOgoApvk7U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SbF+p+doeWmWEjA0edairqWt/6UvcC/HywBaxx6hmUSyA3aLJd5LbIZDWcDTfRrBK/FJa/EjVHTqGpYbcGcOH85qJewc33KJYU2JYzxrLQ1hWaKX3LUPCPASaENIoGxXnMt+ET4pHHrElau9cgN5pWfWL2UJSgj9DXBnMjM4ju4= 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=comZbM/n; arc=none smtp.client-ip=170.10.133.124 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="comZbM/n" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724196101; 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=B4tfOtZ3an7b1aGGuqLauY14dten5jR69+zwwl0cSBE=; b=comZbM/nB6K1RDPFhkeYa3kq9zdWcze6ytfeX4DbVrSKabYBBVRcI0jprZjbVHnCOsdwrE qc9WgGA5tC8QmUBHkIzMpBu4L+2KfoI9ZDnlhksd7h55LokHpARNDZVyh0nofYn1DrXYbf D1GdfyJg71QTondkD2V/sZ0hIAlJ1BU= Received: from mx-prod-mc-02.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-354-Mj8yoYdJNz-fatkw3PTnGQ-1; Tue, 20 Aug 2024 19:21:36 -0400 X-MC-Unique: Mj8yoYdJNz-fatkw3PTnGQ-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 29EA31955D52; Tue, 20 Aug 2024 23:21:31 +0000 (UTC) Received: from warthog.procyon.org.uk.com (unknown [10.42.28.30]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B0C261955F54; Tue, 20 Aug 2024 23:21:26 +0000 (UTC) From: David Howells To: Christian Brauner Cc: David Howells , Pankaj Raghav , Jeff Layton , Matthew Wilcox , 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, linux-kernel@vger.kernel.org, Marc Dionne Subject: [PATCH 3/4] netfs: Fix netfs_release_folio() to say no if folio dirty Date: Wed, 21 Aug 2024 00:20:57 +0100 Message-ID: <20240820232105.3792638-4-dhowells@redhat.com> In-Reply-To: <20240820232105.3792638-1-dhowells@redhat.com> References: <20240820232105.3792638-1-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 10.30.177.17 Fix netfs_release_folio() to say no (ie. return false) if the folio is dirty (analogous with iomap's behaviour). Without this, it will say yes to the release of a dirty page by split_huge_page_to_list_to_order(), which will result in the loss of untruncated data in the folio. Without this, the generic/075 and generic/112 xfstests (both fsx-based tests) fail with minimum folio size patches applied[1]. Fixes: c1ec4d7c2e13 ("netfs: Provide invalidate_folio and release_folio calls") Signed-off-by: David Howells cc: Matthew Wilcox (Oracle) cc: Pankaj Raghav cc: Jeff Layton cc: Marc Dionne cc: linux-afs@lists.infradead.org cc: netfs@lists.linux.dev cc: linux-mm@kvack.org cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/20240815090849.972355-1-kernel@pankajraghav.com/ [1] --- fs/netfs/misc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c index 554a1a4615ad..69324761fcf7 100644 --- a/fs/netfs/misc.c +++ b/fs/netfs/misc.c @@ -161,6 +161,9 @@ bool netfs_release_folio(struct folio *folio, gfp_t gfp) struct netfs_inode *ctx = netfs_inode(folio_inode(folio)); unsigned long long end; + if (folio_test_dirty(folio)) + return false; + end = folio_pos(folio) + folio_size(folio); if (end > ctx->zero_point) ctx->zero_point = end;