From patchwork Fri Aug 23 20:08:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13775978 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 5991F19CCFA for ; Fri, 23 Aug 2024 20:09:08 +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=1724443749; cv=none; b=u/bNfMtcAkH3aK1n6eYrxfkE5/GbFRuMtjaPdk7K7n9LWb85auICxm4kUuEOIbg1LraIn+dStdCqjtskX8CTZ7z7I2Mg9mna0a+Et5sY8SpheBKmH2+FNJdKTBpEq4p2EnPcoO9fvsUo3o+STwM6mWoVpX+oKx8Un/KV/MPc4pU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724443749; c=relaxed/simple; bh=dV0yMgVpUeD9LIPv0bn9kwX9cbvQXt+5EkW+SQzU0O4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hD9O9DllDoCBO07KtnDexWmDgTaDpmE99aqSC2HsDbyHL6uBfq76t9Su4jskOKsGhB/GRp6xK2T+Snojz7+MoHmQqSejkDGirJGTL080rc0q8ZvT85zOY3f8H7LhDzbv6G2Mv342OVpOj9hdEQ4o2/jTlwtTvX3TfqDOjku0jyU= 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=PbPaHx/f; 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="PbPaHx/f" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724443747; 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=J+Q2VjHdhruKVNJRsL+DNuwA1V8DkjXpTij4fAf/kXM=; b=PbPaHx/fPP54Bw874NsvZmT1iFpCzay78CIXmDjOJP7pgRWGviPQ6je4hFdxYHUMMcVx+T oSib5xd14O6aFOc6+EhJIGaQ390tT6moGeygSt9rMsFyk/1poFg4Dn9cRxcJDaGkHHPWrw YIShIkXCXG5SpWxlrBT3yzGEcty/6Pw= Received: from mx-prod-mc-01.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-562-iX0mBMvkOMy-sMazWAhTNw-1; Fri, 23 Aug 2024 16:09:01 -0400 X-MC-Unique: iX0mBMvkOMy-sMazWAhTNw-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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6A0991955D48; Fri, 23 Aug 2024 20:08:59 +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 90C0319560AE; Fri, 23 Aug 2024 20:08:54 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French Cc: David Howells , Pankaj Raghav , Paulo Alcantara , 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 Subject: [PATCH 5/9] netfs: Fix missing iterator reset on retry of short read Date: Fri, 23 Aug 2024 21:08:13 +0100 Message-ID: <20240823200819.532106-6-dhowells@redhat.com> In-Reply-To: <20240823200819.532106-1-dhowells@redhat.com> References: <20240823200819.532106-1-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 3.0 on 10.30.177.40 Fix netfs_rreq_perform_resubmissions() to reset before retrying a short read, otherwise the wrong part of the output buffer will be used. Fixes: 92b6cc5d1e7c ("netfs: Add iov_iters to (sub)requests to describe various buffers") Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/netfs/io.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/netfs/io.c b/fs/netfs/io.c index 5367caf3fa28..4da0a494e860 100644 --- a/fs/netfs/io.c +++ b/fs/netfs/io.c @@ -313,6 +313,7 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_io_request *rreq) netfs_reset_subreq_iter(rreq, subreq); netfs_read_from_server(rreq, subreq); } else if (test_bit(NETFS_SREQ_SHORT_IO, &subreq->flags)) { + netfs_reset_subreq_iter(rreq, subreq); netfs_rreq_short_read(rreq, subreq); } }