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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2238C433EF for ; Sun, 12 Dec 2021 17:06:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231766AbhLLRGw (ORCPT ); Sun, 12 Dec 2021 12:06:52 -0500 Received: from smtp-out2.suse.de ([195.135.220.29]:39828 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231751AbhLLRGw (ORCPT ); Sun, 12 Dec 2021 12:06:52 -0500 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 721471F3B9; Sun, 12 Dec 2021 17:06:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1639328811; 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=LP6/XLbv7kTkGWGEx8tzk0T4zs+C9KDWlqh2LgilVvU=; b=TSVr0MdITeXMwVSXVMmA5mygJlCClSvo6Q/F/M0b2V/HA7AVatxeRaQsCtywi8TwYb1+Ru 0yQaB1iLDQDouPPRi1aL0tMwMaIgqs/A3qZTIR9J904ndxwTjQjCXMOSmUTfoFSOv/tjk+ qqZkuzfCSmwjMDJExvPDMM0jNpr9CDg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1639328811; 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=LP6/XLbv7kTkGWGEx8tzk0T4zs+C9KDWlqh2LgilVvU=; b=FM0IoSUlvmGR4jxZJrnwo03yg1CN6I/EXeO/S9//OmCiPx7eTtCl5CQKxi2QrkMhPnqOFT pwkj5i4pv9bXcsAA== Received: from suse.localdomain (unknown [10.163.16.22]) by relay2.suse.de (Postfix) with ESMTP id 18969A3B88; Sun, 12 Dec 2021 17:06:48 +0000 (UTC) From: Coly Li To: axboe@kernel.dk Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, Coly Li , Hannes Reinecke , Christoph Hellwig , Dan Williams , Jianpeng Ma , Qiaowei Ren Subject: [PATCH v13 12/12] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Date: Mon, 13 Dec 2021 01:05:52 +0800 Message-Id: <20211212170552.2812-13-colyli@suse.de> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211212170552.2812-1-colyli@suse.de> References: <20211212170552.2812-1-colyli@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-bcache@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 45b69ddc9cfa..2b9cde44879b 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -2405,10 +2405,18 @@ 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) { @@ -2522,6 +2530,24 @@ 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) { @@ -2864,6 +2890,9 @@ 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 }; -- 2.31.1