From patchwork Fri Aug 23 16:12:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13775489 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 920E41946C2 for ; Fri, 23 Aug 2024 16:12:58 +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=1724429580; cv=none; b=KAX/6pV8jftuGFx33AdpGNkJedkOcyc+mg7965+hELGC2qr1hAUQ9svFuAE0Yr7ip/Px1g0YWRK7xpWJI9c/XNFlPZePp6vxBQwTRrqnXy9H+M91SMz4YXQaB4GenFircX57rHK4HmAXi1GMfCQJmfzwfNGPDbgV/U8yjr5+Sjs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724429580; c=relaxed/simple; bh=322L4Js8oYAVjx2uj/9TF8tJ9GbLwzzaYu3CG5Lh98w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cIC3/reoc8oyoqBSDEhKL8VimIZINrBRo3MYgzvD+1I376KdB7JjXVSwY+QyMcYYjUlZ5rAnK5vwaCEJfb2WOlMjghnw03nHbmshM8O2ZG8ZEDyQIYSgUe7xwpO5uF3n8Dbfx4FXE6ju2LyvH/x6sHUOTRuYGDcroR990Z9em/o= 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=YesoxUeY; 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="YesoxUeY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724429577; 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=FBChvUZyQ988u9TYFlpOvF0mis7ud805n023OENZupc=; b=YesoxUeYcrPLAIqw7/dK0mAtqn8BaIzhq9MadzAGfBJvnJKAP5vcPOkb/d4K4k849ACozh gHZnT+kgtNpG2FBrq4bL5Z6POzgHWLcegeFD3v2fFWjADkCA7LLXX4S4QFYVswluShYNQU Oz2j8/Px4/SffFc7CcLrHmL3lSezWTk= 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-640-HzxncWQrPICf3GrzTUMYmQ-1; Fri, 23 Aug 2024 12:12:49 -0400 X-MC-Unique: HzxncWQrPICf3GrzTUMYmQ-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 3CFB61954B02; Fri, 23 Aug 2024 16:12:47 +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 368AE19560A3; Fri, 23 Aug 2024 16:12:43 +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 5/5] cifs: Fix credit handling Date: Fri, 23 Aug 2024 17:12:06 +0100 Message-ID: <20240823161209.434705-6-dhowells@redhat.com> In-Reply-To: <20240823161209.434705-1-dhowells@redhat.com> References: <20240823161209.434705-1-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 Fix some bits of credit handling: (1) Use the ->actual_len value rather than the total subrequest length in smb2_adjust_credits() so that we don't trip the error message that we don't have sufficient credits allocated in a retry. (2) Set wdata->actual_len in writes as smb2_adjust_credits() now expects to see it set. (3) Reset the in_flight_check flag on a retry as we're doing a new read. (4) Add a missing credit resubmission trace. Fixes: 82d55e76bf2f ("cifs: Fix lack of credit renegotiation on read retry") 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/smb/client/file.c | 9 +++++++++ fs/smb/client/smb2ops.c | 2 +- fs/smb/client/trace.h | 1 + 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 493c16e7c4ab..b94802438c62 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -111,6 +111,7 @@ static void cifs_issue_write(struct netfs_io_subrequest *subreq) goto fail; } + wdata->actual_len = wdata->subreq.len; rc = adjust_credits(wdata->server, wdata, cifs_trace_rw_credits_issue_write_adjust); if (rc) goto fail; @@ -227,6 +228,14 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) &rdata->credits); if (rc) goto out; + + rdata->credits.in_flight_check = 1; + + trace_smb3_rw_credits(rdata->rreq->debug_id, + rdata->subreq.debug_index, + rdata->credits.value, + server->credits, server->in_flight, 0, + cifs_trace_rw_credits_read_resubmit); } if (req->cfile->invalidHandle) { diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 20e674990760..5090088ba727 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -301,7 +301,7 @@ smb2_adjust_credits(struct TCP_Server_Info *server, unsigned int /*enum smb3_rw_credits_trace*/ trace) { struct cifs_credits *credits = &subreq->credits; - int new_val = DIV_ROUND_UP(subreq->subreq.len, SMB2_MAX_BUFFER_SIZE); + int new_val = DIV_ROUND_UP(subreq->actual_len, SMB2_MAX_BUFFER_SIZE); int scredits, in_flight; if (!credits->value || credits->value == new_val) diff --git a/fs/smb/client/trace.h b/fs/smb/client/trace.h index 0f0c10c7ada7..8e9964001e2a 100644 --- a/fs/smb/client/trace.h +++ b/fs/smb/client/trace.h @@ -30,6 +30,7 @@ EM(cifs_trace_rw_credits_old_session, "old-session") \ EM(cifs_trace_rw_credits_read_response_add, "rd-resp-add") \ EM(cifs_trace_rw_credits_read_response_clear, "rd-resp-clr") \ + EM(cifs_trace_rw_credits_read_resubmit, "rd-resubmit") \ EM(cifs_trace_rw_credits_read_submit, "rd-submit ") \ EM(cifs_trace_rw_credits_write_prepare, "wr-prepare ") \ EM(cifs_trace_rw_credits_write_response_add, "wr-resp-add") \