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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 951E3C49361 for ; Tue, 15 Jun 2021 05:50:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78B9461412 for ; Tue, 15 Jun 2021 05:50:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229918AbhFOFwI (ORCPT ); Tue, 15 Jun 2021 01:52:08 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:57394 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230331AbhFOFwG (ORCPT ); Tue, 15 Jun 2021 01:52:06 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id C9BE8219C5; Tue, 15 Jun 2021 05:50:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1623736201; 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: in-reply-to:in-reply-to:references:references; bh=C3Np6UpmqYzZ4kH5SUJzYj4UbsK192DUNvW0ehDEFvc=; b=0sdVN7Hz8iMI0Vf1UUB6ZRDa1Y58PjjZ2+7kehlOoG7SmjWCDwtmagBk14T+27yIVM4wpQ ltLn00X3kKRnNDA4p1bYMWpTgise7tFN6HLgcYWI1ahXzk6sKlArSAXQtgMf6I/c/cxj5W wO29l5Fd7ldSiSQFCQudC8iMg14/uTk= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1623736201; 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: in-reply-to:in-reply-to:references:references; bh=C3Np6UpmqYzZ4kH5SUJzYj4UbsK192DUNvW0ehDEFvc=; b=WZ1JcYJie3OGdDArDpcqNs6cfA64enkm+26hb8dGdbuVnLImafTmQ6V+FA5fqNXyKTw/s5 hjuekLxXWrKuy5Ag== Received: from localhost.localdomain (unknown [10.163.16.22]) by relay2.suse.de (Postfix) with ESMTP id 0B026A3BB7; Tue, 15 Jun 2021 05:49:59 +0000 (UTC) From: Coly Li To: axboe@kernel.dk Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, Coly Li , Jianpeng Ma , Qiaowei Ren Subject: [PATCH 14/14] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Date: Tue, 15 Jun 2021 13:49:21 +0800 Message-Id: <20210615054921.101421-15-colyli@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210615054921.101421-1-colyli@suse.de> References: <20210615054921.101421-1-colyli@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org This patch adds a sysfs interface register_nvdimm_meta to register NVDIMM meta device. The sysfs interface file only shows up when CONFIG_BCACHE_NVM_PAGES=y. Then a NVDIMM name space formatted by bcache-tools can be registered into bcache by e.g., echo /dev/pmem0 > /sys/fs/bcache/register_nvdimm_meta Signed-off-by: Coly Li Cc: Jianpeng Ma Cc: Qiaowei Ren --- drivers/md/bcache/super.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 4d6666d03aa7..9d506d053548 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -2439,10 +2439,18 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, static ssize_t bch_pending_bdevs_cleanup(struct kobject *k, struct kobj_attribute *attr, const char *buffer, size_t size); +#if defined(CONFIG_BCACHE_NVM_PAGES) +static ssize_t register_nvdimm_meta(struct kobject *k, + struct kobj_attribute *attr, + const char *buffer, size_t size); +#endif kobj_attribute_write(register, register_bcache); kobj_attribute_write(register_quiet, register_bcache); kobj_attribute_write(pendings_cleanup, bch_pending_bdevs_cleanup); +#if defined(CONFIG_BCACHE_NVM_PAGES) +kobj_attribute_write(register_nvdimm_meta, register_nvdimm_meta); +#endif static bool bch_is_open_backing(dev_t dev) { @@ -2556,6 +2564,24 @@ static void register_device_async(struct async_reg_args *args) queue_delayed_work(system_wq, &args->reg_work, 10); } +#if defined(CONFIG_BCACHE_NVM_PAGES) +static ssize_t register_nvdimm_meta(struct kobject *k, struct kobj_attribute *attr, + const char *buffer, size_t size) +{ + ssize_t ret = size; + + struct bch_nvm_namespace *ns = bch_register_namespace(buffer); + + if (IS_ERR(ns)) { + pr_err("register nvdimm namespace %s for meta device failed.\n", + buffer); + ret = -EINVAL; + } + + return ret; +} +#endif + static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, const char *buffer, size_t size) { @@ -2898,6 +2924,9 @@ static int __init bcache_init(void) static const struct attribute *files[] = { &ksysfs_register.attr, &ksysfs_register_quiet.attr, +#if defined(CONFIG_BCACHE_NVM_PAGES) + &ksysfs_register_nvdimm_meta.attr, +#endif &ksysfs_pendings_cleanup.attr, NULL }; -- 2.26.2