From patchwork Wed Aug 11 17:02:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coly Li X-Patchwork-Id: 12431613 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,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 AB3E6C432BE for ; Wed, 11 Aug 2021 17:05:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 852E86101E for ; Wed, 11 Aug 2021 17:05:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230401AbhHKRFr (ORCPT ); Wed, 11 Aug 2021 13:05:47 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:58684 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229530AbhHKRFr (ORCPT ); Wed, 11 Aug 2021 13:05:47 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id A3A4E20195; Wed, 11 Aug 2021 17:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1628701521; 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=efsOw98AEBFshxhhH9/n3GRQdv2ksVkqaTCb57JSsqU=; b=FRR4OFK3s6fk7teQ4WATZ3QEJHo5och1ZjfgFXygxnp8Rc/ube6zMpRQGu2Go5USA+MmjH Utk0j9944xnayK9aiIeVUCxOLL1RHlsbT8KKcuJ1jdIazbWH4LiMgfw+Q8EV4uq45Z2KdZ S3K9brjiqqkxdvENy5sG7fkVDCve07Q= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1628701521; 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=efsOw98AEBFshxhhH9/n3GRQdv2ksVkqaTCb57JSsqU=; b=tZa4CLdOvovYtOXexaq9cWlVntxJgOGmy71E79JNPrcVmpTagz5+uNMhYuXlOlJ+eej4Ta LVmrvUAu1ZQY9xBQ== Received: from localhost.localdomain (colyli.tcp.ovpn1.nue.suse.de [10.163.16.22]) by relay2.suse.de (Postfix) with ESMTP id 9AC0AA3D61; Wed, 11 Aug 2021 17:05:16 +0000 (UTC) From: Coly Li To: linux-bcache@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-nvdimm@lists.linux.dev, axboe@kernel.dk, hare@suse.com, jack@suse.cz, dan.j.williams@intel.com, hch@lst.de, ying.huang@intel.com, Coly Li , Hannes Reinecke , Jianpeng Ma , Qiaowei Ren Subject: [PATCH v12 12/12] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Date: Thu, 12 Aug 2021 01:02:24 +0800 Message-Id: <20210811170224.42837-13-colyli@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210811170224.42837-1-colyli@suse.de> References: <20210811170224.42837-1-colyli@suse.de> MIME-Version: 1.0 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 Reviewed-by: Hannes Reinecke Cc: Christoph Hellwig Cc: Dan Williams Cc: Jens Axboe 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 24734250d005..434739594baf 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -2403,10 +2403,18 @@ 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) { @@ -2520,6 +2528,24 @@ 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_nvmpg_ns *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) { @@ -2855,6 +2881,9 @@ 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 };