From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5176ACA9EA0 for ; Fri, 18 Oct 2019 22:21:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 25245222C3 for ; Fri, 18 Oct 2019 22:21:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571437265; bh=XeF4E6O1xicOpd4lFV31Ksy7SWvxr50/96ido8NDdcE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Xogo4LEIx5tkzCcjBgWPTM3QgGTT2+dCUp5kpxwTXmFb4eDVZTWhU/xec+4Gs50sy PQNY3ezT3VsBkA1epHsknwVBLD+lpGpUR5h5DB12ibOxMYxs1ytiGfB3zCBfHdQI2D iWsFRnIiQiLdC+Bb4YNYT5vLnryJLmJ9imwlvf38= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731607AbfJRWVA (ORCPT ); Fri, 18 Oct 2019 18:21:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:38448 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731590AbfJRWGa (ORCPT ); Fri, 18 Oct 2019 18:06:30 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C2C1D222D1; Fri, 18 Oct 2019 22:06:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571436389; bh=XeF4E6O1xicOpd4lFV31Ksy7SWvxr50/96ido8NDdcE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xzNP+71ZJX4UXxJ++NE/PWOMm4nspRZN6avr0RNBdwJ7e6eHAioI7NAovsEtOVa6c AyHKyXph3nhi7lLUUIO+RmpPQ4iR+Tf13y2d8jBzFsnDfyRXTl+CR6y7atkCHiX9eH HnRhIgUg+s9RxlCJENT8R2+QrcBOFPXiCdbfGmuE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ronnie Sahlberg , Steve French , Pavel Shilovsky , Sasha Levin , linux-cifs@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 041/100] cifs: add credits from unmatched responses/messages Date: Fri, 18 Oct 2019 18:04:26 -0400 Message-Id: <20191018220525.9042-41-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191018220525.9042-1-sashal@kernel.org> References: <20191018220525.9042-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org From: Ronnie Sahlberg [ Upstream commit eca004523811f816bcfca3046ab54e1278e0973b ] We should add any credits granted to us from unmatched server responses. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Reviewed-by: Pavel Shilovsky Signed-off-by: Sasha Levin --- fs/cifs/connect.c | 22 ++++++++++++++++++++++ fs/cifs/smb2misc.c | 7 ------- 2 files changed, 22 insertions(+), 7 deletions(-) diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 966e493c82e57..7e85070d010f4 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -930,6 +930,26 @@ cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) return 0; } +static void +smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) +{ + struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; + + /* + * SMB1 does not use credits. + */ + if (server->vals->header_preamble_size) + return; + + if (shdr->CreditRequest) { + spin_lock(&server->req_lock); + server->credits += le16_to_cpu(shdr->CreditRequest); + spin_unlock(&server->req_lock); + wake_up(&server->request_q); + } +} + + static int cifs_demultiplex_thread(void *p) { @@ -1059,6 +1079,7 @@ cifs_demultiplex_thread(void *p) } else if (server->ops->is_oplock_break && server->ops->is_oplock_break(bufs[i], server)) { + smb2_add_credits_from_hdr(bufs[i], server); cifs_dbg(FYI, "Received oplock break\n"); } else { cifs_dbg(VFS, "No task to wake, unknown frame " @@ -1070,6 +1091,7 @@ cifs_demultiplex_thread(void *p) if (server->ops->dump_detail) server->ops->dump_detail(bufs[i], server); + smb2_add_credits_from_hdr(bufs[i], server); cifs_dump_mids(server); #endif /* CIFS_DEBUG2 */ } diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index 0a7ed2e3ad4f2..e311f58dc1c82 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -659,13 +659,6 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK) return false; - if (rsp->sync_hdr.CreditRequest) { - spin_lock(&server->req_lock); - server->credits += le16_to_cpu(rsp->sync_hdr.CreditRequest); - spin_unlock(&server->req_lock); - wake_up(&server->request_q); - } - if (rsp->StructureSize != smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) { if (le16_to_cpu(rsp->StructureSize) == 44) -- 2.20.1