From patchwork Fri Dec 17 18:47:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goffredo Baroncelli X-Patchwork-Id: 12685527 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 1F9FAC43217 for ; Fri, 17 Dec 2021 18:52:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240504AbhLQSwX (ORCPT ); Fri, 17 Dec 2021 13:52:23 -0500 Received: from santino.mail.tiscali.it ([213.205.33.245]:53002 "EHLO smtp.tiscali.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S240500AbhLQSwV (ORCPT ); Fri, 17 Dec 2021 13:52:21 -0500 Received: from venice.bhome ([78.12.25.242]) by santino.mail.tiscali.it with id XWnP2601f5DQHji01WnRpf; Fri, 17 Dec 2021 18:47:25 +0000 x-auth-user: kreijack@tiscali.it From: Goffredo Baroncelli To: linux-btrfs@vger.kernel.org Cc: Zygo Blaxell , Josef Bacik , David Sterba , Sinnamohideen Shafeeq , Paul Jones , Goffredo Baroncelli Subject: [PATCH 1/6] btrfs: add flags to give an hint to the chunk allocator Date: Fri, 17 Dec 2021 19:47:17 +0100 Message-Id: <377d6c51cb957fbad5627bb93ff0a76ce9ba79da.1639766364.git.kreijack@inwind.it> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Reply-To: Goffredo Baroncelli MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tiscali.it; s=smtp; t=1639766845; bh=jbkkU8asLw/4hSQLus/n6WoA4G/fKeJmATWmP6RZJEg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:Reply-To; b=zIWpeK1qkLxxrqsUxv742y7Si0H3tK8S0kXc9IPYAlCkfxnYOlwB8zGln4ZQdiPdd GBEF4BLl9MuBYSgq3kuzxtyb0GW+EUexnR9kFbpLtqk+EfTLDZUMrJr/cSx2NF53T/ D4owOvXbZT5jFQ4MVsMfTfm7d7lz+WJ6t8azl0Es= Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Goffredo Baroncelli Add the following flags to give an hint about which chunk should be allocated in which a disk: - BTRFS_DEV_ALLOCATION_HINT_PREFERRED_DATA preferred data chunk, but metadata chunk allowed - BTRFS_DEV_ALLOCATION_HINT_PREFERRED_METADATA preferred metadata chunk, but data chunk allowed - BTRFS_DEV_ALLOCATION_HINT_METADATA_ONLY only metadata chunk allowed - BTRFS_DEV_ALLOCATION_HINT_DATA_ONLY only data chunk allowed Signed-off-by: Goffredo Baroncelli --- include/uapi/linux/btrfs_tree.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index 5416f1f1a77a..55da906c2eac 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -386,6 +386,22 @@ struct btrfs_key { __u64 offset; } __attribute__ ((__packed__)); +/* dev_item.type */ + +/* btrfs chunk allocation hint */ +#define BTRFS_DEV_ALLOCATION_HINT_BIT_COUNT 2 +/* btrfs chunk allocation hint mask */ +#define BTRFS_DEV_ALLOCATION_HINT_MASK \ + ((1 << BTRFS_DEV_ALLOCATION_HINT_BIT_COUNT) -1) +/* preferred data chunk, but metadata chunk allowed */ +#define BTRFS_DEV_ALLOCATION_HINT_PREFERRED_DATA (0ULL) +/* preferred metadata chunk, but data chunk allowed */ +#define BTRFS_DEV_ALLOCATION_HINT_PREFERRED_METADATA (1ULL) +/* only metadata chunk are allowed */ +#define BTRFS_DEV_ALLOCATION_HINT_METADATA_ONLY (2ULL) +/* only data chunk allowed */ +#define BTRFS_DEV_ALLOCATION_HINT_DATA_ONLY (3ULL) + struct btrfs_dev_item { /* the internal btrfs device id */ __le64 devid;