From patchwork Fri Aug 23 16:12:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 821774 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 19C19192D8B for ; Fri, 23 Aug 2024 16:12:45 +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=1724429566; cv=none; b=hBZUm1uYv0GeWNh3ckFrrMbvdTJkWFAg6wVk6LuwJ8bm24wGexaGiRZ1AEbs9XtRDc0tACEenUaEyYmjJvmw5RSkExm02R55iQN27jr9q0DyqQZ/7YAOmQlImNzJbp/3E2vPwgNsguQb+OQs0EimmzDmSvkXMiCIUGsHbrVCYyM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724429566; c=relaxed/simple; bh=580hFqprR8ZFI5WWkFW4PKJxwZHdomHT+uVT2jWzm8I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cnTsNrLlLttFec064cpR0P6F+rkgBI1DFBOsv0BPquhOa0TSPJ5R1Xb1xzLmlKI/vny51UhHoqSoKin62Q1qj2Y9B7ddzqgHKz+rD8TZXoo/QaH2x8sSpbfwTldkFpfhXRynDRoGdT7CbhI0MeMuxP0YZTYsm6cfK1aqznu1rbI= 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=Zfxys9dK; 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="Zfxys9dK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724429564; 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=UF1dQkOHc38/CxHdvA+HTnp1kknbAHEKTFkwj9qcOQo=; b=Zfxys9dK6EdT8tkvLTqvAkdmgTHTFN3pYD+1N2YY0X/LLCCv93B0G0MsuIF2MbRavaqjtA HMclEPk/hpYQIMUHSaBjPAIXR/LGgWRFVjrDyua8Fttb+ThiqIhE6xGWeLnat4i6Cr2hRD LqAbQzP2rLh5atCbXv4II5UAhMbgPi0= Received: from mx-prod-mc-03.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-99-8smGqBV2N5OacPwQdgxAmQ-1; Fri, 23 Aug 2024 12:12:39 -0400 X-MC-Unique: 8smGqBV2N5OacPwQdgxAmQ-1 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 571C51955D4E; Fri, 23 Aug 2024 16:12:36 +0000 (UTC) Received: from warthog.procyon.org.uk.com (unknown [10.42.28.30]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 11C6819560AA; Fri, 23 Aug 2024 16:12:31 +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, Steve French , Paulo Alcantara Subject: [PATCH 3/5] netfs: Fix missing iterator reset on retry of short read Date: Fri, 23 Aug 2024 17:12:04 +0100 Message-ID: <20240823161209.434705-4-dhowells@redhat.com> In-Reply-To: <20240823161209.434705-1-dhowells@redhat.com> References: <20240823161209.434705-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: ceph-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 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 605b667fe3a6..d6ada4eba744 100644 --- a/fs/netfs/io.c +++ b/fs/netfs/io.c @@ -315,6 +315,7 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_io_request *rreq) netfs_read_from_server(rreq, subreq); } else if (test_bit(NETFS_SREQ_SHORT_IO, &subreq->flags)) { __set_bit(NETFS_SREQ_RETRYING, &subreq->flags); + netfs_reset_subreq_iter(rreq, subreq); netfs_rreq_short_read(rreq, subreq); } }