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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 B72BDC43461 for ; Fri, 9 Apr 2021 16:45:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 877FD610A7 for ; Fri, 9 Apr 2021 16:45:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234011AbhDIQpj (ORCPT ); Fri, 9 Apr 2021 12:45:39 -0400 Received: from mx2.suse.de ([195.135.220.15]:35894 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234190AbhDIQpj (ORCPT ); Fri, 9 Apr 2021 12:45:39 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 387EAB10B; Fri, 9 Apr 2021 16:45:25 +0000 (UTC) From: Coly Li To: linux-bcache@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-nvdimm@lists.01.org, axboe@kernel.dk, jianpeng.ma@intel.com, qiaowei.ren@intel.com, hare@suse.com, jack@suse.cz, dan.j.williams@intel.com, Coly Li Subject: [PATCH v7 13/16] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Date: Sat, 10 Apr 2021 00:43:40 +0800 Message-Id: <20210409164343.56828-14-colyli@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210409164343.56828-1-colyli@suse.de> References: <20210409164343.56828-1-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 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 9640bfb85571..d95a9a3c2041 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -2436,10 +2436,18 @@ 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); +#ifdef 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); +#ifdef CONFIG_BCACHE_NVM_PAGES +kobj_attribute_write(register_nvdimm_meta, register_nvdimm_meta); +#endif static bool bch_is_open_backing(dev_t dev) { @@ -2553,6 +2561,24 @@ static void register_device_async(struct async_reg_args *args) queue_delayed_work(system_wq, &args->reg_work, 10); } +#ifdef 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) { @@ -2888,6 +2914,9 @@ static int __init bcache_init(void) static const struct attribute *files[] = { &ksysfs_register.attr, &ksysfs_register_quiet.attr, +#ifdef CONFIG_BCACHE_NVM_PAGES + &ksysfs_register_nvdimm_meta.attr, +#endif &ksysfs_pendings_cleanup.attr, NULL }; -- 2.26.2