From patchwork Sat Feb 15 09:22:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13975985 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14D2519CC3D; Sat, 15 Feb 2025 09:25:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739611562; cv=none; b=r260/bnVzdvNtn7dp4sewDlrruHLppB5x3BiyBuikuYNi7qGMZqu3DiI8kpmm98PIVKkUvxqlgRutCbHydXEwrQyW2RAaOJp/dIX/GvBQNq01i/Cmk/OANfsJpAG+RdoCFoc23khoWJYYIlIcg7l6U7YTwctpHuMdBTZn/Zow7w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739611562; c=relaxed/simple; bh=mUILkePBFpIIgQf9yJ9Y+gJ70NkpBnuxcjxqCKXkZCE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=My7Svh5zibbQmmi1Rpi/z5y1qbm3QmicBAE566uaPJeq9Oz7CAAUnnJnmhHCxD8fAAg0RMxalfZBVNhGkxlwSwnZgRKJO5RxpU5XZ1CmmQHWnKhapYffQ8hJm9s/WKb2JUnkOuZwbF0L77zuJ88P47LgwGQdhEVu1aABJOC3ZxE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4Yw3Ry21hfz4f3jqN; Sat, 15 Feb 2025 17:25:34 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 6D3011A1333; Sat, 15 Feb 2025 17:25:50 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgAni1+bXbBn+Q+iDw--.49525S7; Sat, 15 Feb 2025 17:25:50 +0800 (CST) From: Yu Kuai To: song@kernel.org, yukuai3@huawei.com Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH md-6.15 3/7] md: introduce struct md_submodule_head and APIs Date: Sat, 15 Feb 2025 17:22:21 +0800 Message-Id: <20250215092225.2427977-4-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250215092225.2427977-1-yukuai1@huaweicloud.com> References: <20250215092225.2427977-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgAni1+bXbBn+Q+iDw--.49525S7 X-Coremail-Antispam: 1UD129KBjvJXoWxuF45KrW5tw1DuFyUtFWUArb_yoW5tryDpF WDW343CrW5Xr42gw4fC3W8uFy5Kry8KrWj9a4ay39IkF1jgrW8Aa1UGa98AFn5GF9xZrsr Zw15Ga1Du34UJw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBG14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JrWl82xGYIkIc2 x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY1x0262kKe7AKxVWUAVWUtw CF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j 6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64 vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0x vEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU9J5rUUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ From: Yu Kuai Prepare to unify registration and unregistration of md personalities and md-cluster, also prepare for add kconfig for md-bitmap. Signed-off-by: Yu Kuai --- drivers/md/md-cluster.h | 2 ++ drivers/md/md.c | 14 ++++++++++++++ drivers/md/md.h | 31 +++++++++++++++++++++++++++++++ 3 files changed, 47 insertions(+) diff --git a/drivers/md/md-cluster.h b/drivers/md/md-cluster.h index 6c7aad00f5da..4e842af11fb4 100644 --- a/drivers/md/md-cluster.h +++ b/drivers/md/md-cluster.h @@ -10,6 +10,8 @@ struct mddev; struct md_rdev; struct md_cluster_operations { + struct md_submodule_head head; + int (*join)(struct mddev *mddev, int nodes); int (*leave)(struct mddev *mddev); int (*slot_number)(struct mddev *mddev); diff --git a/drivers/md/md.c b/drivers/md/md.c index 37f3a89eba94..6b83039a3dcc 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -79,6 +79,8 @@ static const char *action_name[NR_SYNC_ACTIONS] = { [ACTION_IDLE] = "idle", }; +static DEFINE_XARRAY(md_submodule); + /* pers_list is a list of registered personalities protected by pers_lock. */ static LIST_HEAD(pers_list); static DEFINE_SPINLOCK(pers_lock); @@ -8522,6 +8524,18 @@ static const struct proc_ops mdstat_proc_ops = { .proc_poll = mdstat_poll, }; +int register_md_submodule(struct md_submodule_head *msh) +{ + return xa_insert(&md_submodule, msh->id, msh, GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(register_md_submodule); + +void unregister_md_submodule(struct md_submodule_head *msh) +{ + xa_erase(&md_submodule, msh->id); +} +EXPORT_SYMBOL_GPL(unregister_md_submodule); + int register_md_personality(struct md_personality *p) { pr_debug("md: %s personality registered for level %d\n", diff --git a/drivers/md/md.h b/drivers/md/md.h index c9bc70e6d5b4..4807fa0d0362 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -18,10 +18,37 @@ #include #include #include +#include #include #define MaxSector (~(sector_t)0) +enum md_submodule_type { + MD_PERSONALITY = 0, + MD_CLUSTER, + MD_BITMAP, /* TODO */ +}; + +enum md_submodule_id { + ID_LINEAR = LEVEL_LINEAR, + ID_RAID0 = 0, + ID_RAID1 = 1, + ID_RAID4 = 4, + ID_RAID5 = 5, + ID_RAID6 = 6, + ID_RAID10 = 10, + ID_CLUSTER, + ID_BITMAP, /* TODO */ + ID_LLBITMAP, /* TODO */ +}; + +struct md_submodule_head { + enum md_submodule_type type; + enum md_submodule_id id; + const char *name; + struct module *owner; +}; + /* * These flags should really be called "NO_RETRY" rather than * "FAILFAST" because they don't make any promise about time lapse, @@ -698,6 +725,7 @@ static inline void md_sync_acct_bio(struct bio *bio, unsigned long nr_sectors) struct md_personality { + struct md_submodule_head head; char *name; int level; struct list_head list; @@ -842,6 +870,9 @@ static inline void safe_put_page(struct page *p) if (p) put_page(p); } +int register_md_submodule(struct md_submodule_head *msh); +void unregister_md_submodule(struct md_submodule_head *msh); + extern int register_md_personality(struct md_personality *p); extern int unregister_md_personality(struct md_personality *p); extern struct md_thread *md_register_thread(