From patchwork Tue Nov 1 15:00:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13027085 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 403F1C433FE for ; Tue, 1 Nov 2022 15:08:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231381AbiKAPIf (ORCPT ); Tue, 1 Nov 2022 11:08:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230421AbiKAPIF (ORCPT ); Tue, 1 Nov 2022 11:08:05 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 551141E73D for ; Tue, 1 Nov 2022 08:01:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=Be+zd3xtXP6zSt/C9rrJRBJ64ghK1c1HAkxsmDcJqRk=; b=CaqmACPD9AoE3KLkg1+BmxZwUR DCinCE7alPLSP08Vu0IeX2mjqJb+PTaDYaUTA5dwFHb1VCO/Y/jrjSZT27lyQCv85pdKSTObgnvQE 491/P5uisUxbNFaM/xAxIp84tj8uwG1Ce025e/mjD6CtbY5E655itC349XqslUvgyJqzHg7abEWPY /pkFUDrtZlAQ/A1T/JxO9vRFnz+tlX/kHkhv5v5EXj5JZrTgX5PAhfHatkCBjgXe7sNb0MzgcYuuL 1iLO6M78GHV73v9X4SVKkYBRgM75cUs5DeMzHvVfg2/tJW6yu/I8DBMMrough45qvq/uAw0NUQHHp AeZXp0vQ==; Received: from [2001:4bb8:180:e42a:50da:325f:4a06:8830] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1opslQ-005glu-Rj; Tue, 01 Nov 2022 15:01:17 +0000 From: Christoph Hellwig To: Jens Axboe , Keith Busch , Sagi Grimberg , Chao Leng Cc: Ming Lei , linux-nvme@lists.infradead.org, linux-block@vger.kernel.org Subject: [PATCH 07/14] nvme: split nvme_kill_queues Date: Tue, 1 Nov 2022 16:00:43 +0100 Message-Id: <20221101150050.3510-8-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221101150050.3510-1-hch@lst.de> References: <20221101150050.3510-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org nvme_kill_queues does two things: 1) mark the gendisk of all namespaces dead 2) unquiesce all I/O queues These used to be be intertwined due to block layer issues, but aren't any more. So move the unquiscing of the I/O queues into the callers, and rename the rest of the function to the now more descriptive nvme_mark_namespaces_dead. Signed-off-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Chaitanya Kulkarni --- drivers/nvme/host/apple.c | 3 ++- drivers/nvme/host/core.c | 36 ++++++++---------------------------- drivers/nvme/host/nvme.h | 3 +-- drivers/nvme/host/pci.c | 6 ++++-- 4 files changed, 15 insertions(+), 33 deletions(-) diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c index a89b06a7099f1..6c09703ffe922 100644 --- a/drivers/nvme/host/apple.c +++ b/drivers/nvme/host/apple.c @@ -1153,7 +1153,8 @@ static void apple_nvme_reset_work(struct work_struct *work) nvme_change_ctrl_state(&anv->ctrl, NVME_CTRL_DELETING); nvme_get_ctrl(&anv->ctrl); apple_nvme_disable(anv, false); - nvme_kill_queues(&anv->ctrl); + nvme_mark_namespaces_dead(&anv->ctrl); + nvme_start_queues(&anv->ctrl); if (!queue_work(nvme_wq, &anv->remove_work)) nvme_put_ctrl(&anv->ctrl); } diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index bb62803de5b21..ed06fcb87f93a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -4561,8 +4561,10 @@ void nvme_remove_namespaces(struct nvme_ctrl *ctrl) * removing the namespaces' disks; fail all the queues now to avoid * potentially having to clean up the failed sync later. */ - if (ctrl->state == NVME_CTRL_DEAD) - nvme_kill_queues(ctrl); + if (ctrl->state == NVME_CTRL_DEAD) { + nvme_mark_namespaces_dead(ctrl); + nvme_start_queues(ctrl); + } /* this is a no-op when called from the controller reset handler */ nvme_change_ctrl_state(ctrl, NVME_CTRL_DELETING_NOIO); @@ -5108,39 +5110,17 @@ static void nvme_stop_ns_queue(struct nvme_ns *ns) blk_mq_wait_quiesce_done(ns->queue); } -/* - * Prepare a queue for teardown. - * - * This must forcibly unquiesce queues to avoid blocking dispatch. - */ -static void nvme_set_queue_dying(struct nvme_ns *ns) -{ - if (test_and_set_bit(NVME_NS_DEAD, &ns->flags)) - return; - - blk_mark_disk_dead(ns->disk); - nvme_start_ns_queue(ns); -} - -/** - * nvme_kill_queues(): Ends all namespace queues - * @ctrl: the dead controller that needs to end - * - * Call this function when the driver determines it is unable to get the - * controller in a state capable of servicing IO. - */ -void nvme_kill_queues(struct nvme_ctrl *ctrl) +/* let I/O to all namespaces fail in preparation for surprise removal */ +void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl) { struct nvme_ns *ns; down_read(&ctrl->namespaces_rwsem); - list_for_each_entry(ns, &ctrl->namespaces, list) - nvme_set_queue_dying(ns); - + blk_mark_disk_dead(ns->disk); up_read(&ctrl->namespaces_rwsem); } -EXPORT_SYMBOL_GPL(nvme_kill_queues); +EXPORT_SYMBOL_GPL(nvme_mark_namespaces_dead); void nvme_unfreeze(struct nvme_ctrl *ctrl) { diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index a29877217ee65..1cd7168002438 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -483,7 +483,6 @@ struct nvme_ns { unsigned long features; unsigned long flags; #define NVME_NS_REMOVING 0 -#define NVME_NS_DEAD 1 #define NVME_NS_ANA_PENDING 2 #define NVME_NS_FORCE_RO 3 #define NVME_NS_READY 4 @@ -758,7 +757,7 @@ void nvme_stop_queues(struct nvme_ctrl *ctrl); void nvme_start_queues(struct nvme_ctrl *ctrl); void nvme_stop_admin_queue(struct nvme_ctrl *ctrl); void nvme_start_admin_queue(struct nvme_ctrl *ctrl); -void nvme_kill_queues(struct nvme_ctrl *ctrl); +void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl); void nvme_sync_queues(struct nvme_ctrl *ctrl); void nvme_sync_io_queues(struct nvme_ctrl *ctrl); void nvme_unfreeze(struct nvme_ctrl *ctrl); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 0e8410edb41bf..046fc02914a5a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2788,7 +2788,8 @@ static void nvme_remove_dead_ctrl(struct nvme_dev *dev) nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING); nvme_get_ctrl(&dev->ctrl); nvme_dev_disable(dev, false); - nvme_kill_queues(&dev->ctrl); + nvme_mark_namespaces_dead(&dev->ctrl); + nvme_start_queues(&dev->ctrl); if (!queue_work(nvme_wq, &dev->remove_work)) nvme_put_ctrl(&dev->ctrl); } @@ -2913,7 +2914,8 @@ static void nvme_reset_work(struct work_struct *work) nvme_unfreeze(&dev->ctrl); } else { dev_warn(dev->ctrl.device, "IO queues lost\n"); - nvme_kill_queues(&dev->ctrl); + nvme_mark_namespaces_dead(&dev->ctrl); + nvme_start_queues(&dev->ctrl); nvme_remove_namespaces(&dev->ctrl); nvme_free_tagset(dev); }