From patchwork Wed Nov 20 14:09:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Coddington X-Patchwork-Id: 13881238 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 C397F1B5808 for ; Wed, 20 Nov 2024 14:09:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732111789; cv=none; b=GkHrXGw6Qt3n4CGQQ3qkAL1YACX6udkjt3jCngsQ/Wklq5HK92xicSlrnuBfTr71Hzv7+tDrv4jaUdyi7K2pVkh8knLcJBTHC4EoPUoHzkbmel+kAoUgRWaO1pCY7Pc3HNaDKYqTaxzkxWfUjJumMVN3j5LmCMsNSqBYTEDMq3U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732111789; c=relaxed/simple; bh=3xktHGjcwKLhOF8Z8CDzVVn2fFRzytFyj2iHYgJ233s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jRA4iTjdaGiwc6ZTqCmFCk4bLkAtVh8l0RsAAFO4P/4hsyTrCUCZTnJj8XqvvbuDjUBu8D/R6CORh/ML8U8pvbosh5pVz33xB5W9XP+OensF6/4ets4xIkM9L2MrXtf6ImnO+fTTd9JQmYGRgilQ8llqO7ErvzuOP5y0czUtT/4= 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=ZJlCPff6; arc=none smtp.client-ip=170.10.129.124 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="ZJlCPff6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1732111786; 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=obBlFw7qbM1McyMjnug/w2OVz6Lnb7eCQvB8k59rMVI=; b=ZJlCPff64Y36S0nnIa9nEGHGqRhl4B/hIZyUs/B4xapB9lQtcILizVATIT107ST3EC/UVF kY0xRzIb76b1CV1kMFycvdx5W0hwqbdhdaaNXrF76KxS017gbAoLFKQMlb0u05cBUM3vCV RERsQiCD64Dm903YzgTYw3tTOraj6PQ= Received: from mx-prod-mc-04.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-575-rslvtjznM5CuQKOZoWDIyQ-1; Wed, 20 Nov 2024 09:09:43 -0500 X-MC-Unique: rslvtjznM5CuQKOZoWDIyQ-1 X-Mimecast-MFC-AGG-ID: rslvtjznM5CuQKOZoWDIyQ Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id DD18F1955DC1; Wed, 20 Nov 2024 14:09:41 +0000 (UTC) Received: from bcodding.csb.redhat.com (unknown [10.22.74.7]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A35461955F43; Wed, 20 Nov 2024 14:09:40 +0000 (UTC) From: Benjamin Coddington To: Trond Myklebust , Anna Schumaker , Chuck Lever Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig Subject: [PATCH 2/2] nfs/blocklayout: Limit repeat device registration on failure Date: Wed, 20 Nov 2024 09:09:35 -0500 Message-ID: In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 If we're unable to register a SCSI device, ensure we mark the device as unavailable so that it will timeout and be re-added via GETDEVINFO. This avoids repeated doomed attempts to register a device in the IO path. Add some clarifying comments as well. Fixes: d869da91cccb ("nfs/blocklayout: Fix premature PR key unregistration") Signed-off-by: Benjamin Coddington Reviewed-by: Christoph Hellwig Reviewed-by: Chuck Lever --- fs/nfs/blocklayout/blocklayout.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c index 0becdec12970..b36bc2f4f7e2 100644 --- a/fs/nfs/blocklayout/blocklayout.c +++ b/fs/nfs/blocklayout/blocklayout.c @@ -571,19 +571,29 @@ bl_find_get_deviceid(struct nfs_server *server, if (!node) return ERR_PTR(-ENODEV); + /* + * Devices that are marked unavailable are left in the cache with a + * timeout to avoid sending GETDEVINFO after every LAYOUTGET, or + * constantly attempting to register the device. Once marked as + * unavailable they must be deleted and never reused. + */ if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) { unsigned long end = jiffies; unsigned long start = end - PNFS_DEVICE_RETRY_TIMEOUT; if (!time_in_range(node->timestamp_unavailable, start, end)) { + /* Force a new GETDEVINFO for this LAYOUT */ nfs4_delete_deviceid(node->ld, node->nfs_client, id); goto retry; } goto out_put; } - if (!bl_register_dev(container_of(node, struct pnfs_block_dev, node))) + /* If we cannot register, treat this device as transient */ + if (!bl_register_dev(container_of(node, struct pnfs_block_dev, node))) { + nfs4_mark_deviceid_unavailable(node); goto out_put; + } return node;