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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 48FCCC4338F for ; Wed, 11 Aug 2021 15:28:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CD6BF60232 for ; Wed, 11 Aug 2021 15:28:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CD6BF60232 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=dKhiI4S4FNJwMEQW8X9CdarZ3FSiAZGQdRNARb68REk=; b=MDXyWVt6SsuKMa YbO/SFw3WhbwxC63KAmpxGhxkRBWm9ILT9+RkQHuQvzR8LoE/R3L56/Nh5cnb81KpYBXBAyl9TCO9 RgJ64o7wJYzN4DJ5kPqCtPG+YwAnmEQ2E03Le7z+0oOTlhiUnzbFQTKy8HdPeRGago2aoQuI4AARX BiT0CZV57JYQYqfRNIVgYAU7B7S7+V0fRysMUu+/zdrXTN7nL9fRdywzZL19uRhAQRdhAzq4vWPA0 UZ2vIhGFl3buzlmbwPlHVXrIp0rkuAgsjsdotR4HvXaVBclKD04IRQkfR62zo4PKEpKXw7PoMlmHU wAhz74/MwMcb9cyJt4jg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDq9T-007Y7O-LN; Wed, 11 Aug 2021 15:28:19 +0000 Received: from smtp-out2.suse.de ([195.135.220.29]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mDq9O-007Y6D-KH for linux-nvme@lists.infradead.org; Wed, 11 Aug 2021 15:28:18 +0000 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 4F55520183; Wed, 11 Aug 2021 15:28:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1628695693; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=qVpj36goDCS//Jf9WTELUM0rUuZ9Y7MS7bfc+mk0rs4=; b=rfRAtbSvmBpqkOTMI3tccPfFOd3FP0ENq6Kdn7M+bQVM4VLo+UdgIRrAdVBvwuFkWjJUq4 PokTHUq9OuZN3+V9mA4slX2QJTa0QNkG0STbwpyZoCbJGbymSsViSr2NXIp5G/wlUeotTS 2hzctYiRz951mQ+Z2Szd47irqKGC0vY= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1628695693; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=qVpj36goDCS//Jf9WTELUM0rUuZ9Y7MS7bfc+mk0rs4=; b=L3QwBrDjYn6xHCFbvTBc30PhlKGCrrAsr9P+KDN8oWciR1IIAbRSdCe36JPvEBELzPdZTb pgUkVVVEwAtbTLDA== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id 48E91A3CE2; Wed, 11 Aug 2021 15:28:12 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 17828) id 6BC16518CA2C; Wed, 11 Aug 2021 17:28:12 +0200 (CEST) From: Daniel Wagner To: linux-nvme@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Hannes Reinecke , Sagi Grimberg , Daniel Wagner Subject: [PATCH v3] nvme: revalidate paths during rescan Date: Wed, 11 Aug 2021 17:28:03 +0200 Message-Id: <20210811152803.30017-1-dwagner@suse.de> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210811_082814_876642_8F7363C3 X-CRM114-Status: GOOD ( 16.84 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Hannes Reinecke When triggering a rescan due to a namespace resize we will be receiving AENs on every controller, triggering a rescan of all attached namespaces. If multipath is active only the current path and the ns_head disk will be updated, the other paths will still refer to the old size until AENs for the remaining controllers are received. If I/O comes in before that it might be routed to one of the old paths, triggering an I/O failure with 'access beyond end of device'. With this patch the old paths are skipped from multipath path selection until the controller serving these paths has been rescanned. Signed-off-by: Hannes Reinecke [dwagner: - introduce NVME_NS_READY flag instead of NVME_NS_INVALIDATE - use 'revalidate' instead of 'invalidate' which follows the zoned device code path.] Tested-by: Daniel Wagner Signed-off-by: Daniel Wagner --- v3: - Renamed nvme_mpath_invalidated_paths to nvme_mpath_revalidate_paths() - Replaced NVME_NS_INVALIDATE with NVME_NS_READY v2: - https://lore.kernel.org/linux-nvme/20210730071059.124347-1-dwagner@suse.de/ - removed churn from failed rebase. v1: - https://lore.kernel.org/linux-nvme/20210729194630.i5mhvvgb73duojqq@beryllium.lan/ drivers/nvme/host/core.c | 3 +++ drivers/nvme/host/multipath.c | 17 ++++++++++++++++- drivers/nvme/host/nvme.h | 5 +++++ 3 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 2f0cbaba12ac..54aafde4f556 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1878,6 +1878,7 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id) goto out_unfreeze; } + set_bit(NVME_NS_READY, &ns->flags); blk_mq_unfreeze_queue(ns->disk->queue); if (blk_queue_is_zoned(ns->queue)) { @@ -1889,6 +1890,7 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_id_ns *id) if (nvme_ns_head_multipath(ns->head)) { blk_mq_freeze_queue(ns->head->disk->queue); nvme_update_disk_info(ns->head->disk, ns, id); + nvme_mpath_revalidate_paths(ns); blk_stack_limits(&ns->head->disk->queue->limits, &ns->queue->limits, 0); blk_queue_update_readahead(ns->head->disk->queue); @@ -3816,6 +3818,7 @@ static void nvme_ns_remove(struct nvme_ns *ns) if (test_and_set_bit(NVME_NS_REMOVING, &ns->flags)) return; + clear_bit(NVME_NS_READY, &ns->flags); set_capacity(ns->disk, 0); nvme_fault_inject_fini(&ns->fault_inject); diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 3f32c5e86bfc..d390f14b8bb6 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -147,6 +147,21 @@ void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) mutex_unlock(&ctrl->scan_lock); } +void nvme_mpath_revalidate_paths(struct nvme_ns *ns) +{ + struct nvme_ns_head *head = ns->head; + sector_t capacity = get_capacity(head->disk); + int node; + + for_each_node(node) + rcu_assign_pointer(head->current_path[node], NULL); + + list_for_each_entry_rcu(ns, &head->list, siblings) { + if (capacity != get_capacity(ns->disk)) + clear_bit(NVME_NS_READY, &ns->flags); + } +} + static bool nvme_path_is_disabled(struct nvme_ns *ns) { /* @@ -158,7 +173,7 @@ static bool nvme_path_is_disabled(struct nvme_ns *ns) ns->ctrl->state != NVME_CTRL_DELETING) return true; if (test_bit(NVME_NS_ANA_PENDING, &ns->flags) || - test_bit(NVME_NS_REMOVING, &ns->flags)) + !test_bit(NVME_NS_READY, &ns->flags)) return true; return false; } diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 26511794629b..6c67dac79168 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -468,6 +468,7 @@ struct nvme_ns { #define NVME_NS_DEAD 1 #define NVME_NS_ANA_PENDING 2 #define NVME_NS_FORCE_RO 3 +#define NVME_NS_READY 4 struct cdev cdev; struct device cdev_device; @@ -760,6 +761,7 @@ void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl); void nvme_mpath_uninit(struct nvme_ctrl *ctrl); void nvme_mpath_stop(struct nvme_ctrl *ctrl); bool nvme_mpath_clear_current_path(struct nvme_ns *ns); +void nvme_mpath_revalidate_paths(struct nvme_ns *ns); void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); void nvme_mpath_shutdown_disk(struct nvme_ns_head *head); @@ -807,6 +809,9 @@ static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) { return false; } +static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns) +{ +} static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) { } -- 2.29.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme