From patchwork Wed Jul 6 12:55:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9216337 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F406A60752 for ; Wed, 6 Jul 2016 12:56:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E4EAE288A5 for ; Wed, 6 Jul 2016 12:56:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D9583288A7; Wed, 6 Jul 2016 12:56:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6687F288A5 for ; Wed, 6 Jul 2016 12:56:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754068AbcGFM4F (ORCPT ); Wed, 6 Jul 2016 08:56:05 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:36296 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751895AbcGFM4E (ORCPT ); Wed, 6 Jul 2016 08:56:04 -0400 Received: from i60-34-157-115.s41.a006.ap.plala.or.jp ([60.34.157.115] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.85_2 #1 (Red Hat Linux)) id 1bKmN0-0000CQ-Vt; Wed, 06 Jul 2016 12:56:03 +0000 From: Christoph Hellwig To: axboe@kernel.dk, keith.busch@intel.com Cc: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org Subject: [PATCH 2/5] nvme: add new reconnecting controller state Date: Wed, 6 Jul 2016 21:55:49 +0900 Message-Id: <1467809752-31320-3-git-send-email-hch@lst.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1467809752-31320-1-git-send-email-hch@lst.de> References: <1467809752-31320-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The nvme fabric (RDMA, FC, etc...) can introduce port, link or node failures that may require a reconnect to re-establish the connection. Add a new reconnecting state that will initially be used by the RDMA driver. Reviewed-by: Jay Freyensee Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig Reviewed-by: Steve Wise --- drivers/nvme/host/core.c | 12 ++++++++++++ drivers/nvme/host/nvme.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index c01687d..4babdf0 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -88,6 +88,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, switch (old_state) { case NVME_CTRL_NEW: case NVME_CTRL_RESETTING: + case NVME_CTRL_RECONNECTING: changed = true; /* FALLTHRU */ default: @@ -98,6 +99,16 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, switch (old_state) { case NVME_CTRL_NEW: case NVME_CTRL_LIVE: + case NVME_CTRL_RECONNECTING: + changed = true; + /* FALLTHRU */ + default: + break; + } + break; + case NVME_CTRL_RECONNECTING: + switch (old_state) { + case NVME_CTRL_LIVE: changed = true; /* FALLTHRU */ default: @@ -108,6 +119,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, switch (old_state) { case NVME_CTRL_LIVE: case NVME_CTRL_RESETTING: + case NVME_CTRL_RECONNECTING: changed = true; /* FALLTHRU */ default: diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 8d8cbc4..abe83b4 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -74,6 +74,7 @@ enum nvme_ctrl_state { NVME_CTRL_NEW, NVME_CTRL_LIVE, NVME_CTRL_RESETTING, + NVME_CTRL_RECONNECTING, NVME_CTRL_DELETING, NVME_CTRL_DEAD, };