From patchwork Thu Dec 2 08:48:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12652003 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 2A5D8C433FE for ; Thu, 2 Dec 2021 08:49:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356368AbhLBIwp (ORCPT ); Thu, 2 Dec 2021 03:52:45 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:52106 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1356287AbhLBIwg (ORCPT ); Thu, 2 Dec 2021 03:52:36 -0500 IronPort-Data: A9a23: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 IronPort-HdrOrdr: A9a23:cjlupKnfX2IkJjrHdHw2T1GfUgbpDfIQ3DAbv31ZSRFFG/Fw9vre+MjzsCWYtN9/Yh8dcK+7UpVoLUm8yXcX2/h1AV7BZniEhILAFugLgrcKqAeQeREWmNQ86Y5QN4B6CPDVSWNxlNvG5mCDeOoI8Z2q97+JiI7lo0tQcQ== X-IronPort-AV: E=Sophos;i="5.87,281,1631548800"; d="scan'208";a="118319114" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 02 Dec 2021 16:49:10 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id 739B74D13A1C; Thu, 2 Dec 2021 16:49:05 +0800 (CST) Received: from G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.85) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 2 Dec 2021 16:49:07 +0800 Received: from irides.mr.mr.mr (10.167.225.141) by G08CNEXCHPEKD09.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.23 via Frontend Transport; Thu, 2 Dec 2021 16:49:03 +0800 From: Shiyang Ruan To: , , , , CC: , , , , Subject: [PATCH v8 7/9] dax: add dax holder helper for filesystems Date: Thu, 2 Dec 2021 16:48:54 +0800 Message-ID: <20211202084856.1285285-8-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211202084856.1285285-1-ruansy.fnst@fujitsu.com> References: <20211202084856.1285285-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 739B74D13A1C.A1DDA X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Add these helper functions, and export them for filesystem use. Signed-off-by: Shiyang Ruan --- drivers/dax/super.c | 19 +++++++++++++++++++ include/linux/dax.h | 15 +++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index a19fcc0a54f3..acbe7078ce4c 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -114,6 +114,25 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev, u64 *start_off) return dax_dev; } EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); + +void fs_dax_register_holder(struct dax_device *dax_dev, void *holder, + const struct dax_holder_operations *ops) +{ + dax_set_holder(dax_dev, holder, ops); +} +EXPORT_SYMBOL_GPL(fs_dax_register_holder); + +void fs_dax_unregister_holder(struct dax_device *dax_dev) +{ + dax_set_holder(dax_dev, NULL, NULL); +} +EXPORT_SYMBOL_GPL(fs_dax_unregister_holder); + +void *fs_dax_get_holder(struct dax_device *dax_dev) +{ + return dax_get_holder(dax_dev); +} +EXPORT_SYMBOL_GPL(fs_dax_get_holder); #endif /* CONFIG_BLOCK && CONFIG_FS_DAX */ enum dax_device_flags { diff --git a/include/linux/dax.h b/include/linux/dax.h index 500d048d444e..15a0ad4c248d 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -140,6 +140,10 @@ static inline void fs_put_dax(struct dax_device *dax_dev) { put_dax(dax_dev); } +void fs_dax_register_holder(struct dax_device *dax_dev, void *holder, + const struct dax_holder_operations *ops); +void fs_dax_unregister_holder(struct dax_device *dax_dev); +void *fs_dax_get_holder(struct dax_device *dax_dev); #else static inline int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk) { @@ -156,6 +160,17 @@ static inline struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev, static inline void fs_put_dax(struct dax_device *dax_dev) { } +static inline void fs_dax_register_holder(struct dax_device *dax_dev, + void *holder, const struct dax_holder_operations *ops) +{ +} +static inline void fs_dax_unregister_holder(struct dax_device *dax_dev) +{ +} +static inline void *fs_dax_get_holder(struct dax_device *dax_dev) +{ + return NULL; +} #endif /* CONFIG_BLOCK && CONFIG_FS_DAX */ #if IS_ENABLED(CONFIG_FS_DAX)