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 00C5AC433FE for ; Mon, 16 May 2022 14:31:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244563AbiEPOby (ORCPT ); Mon, 16 May 2022 10:31:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244456AbiEPObu (ORCPT ); Mon, 16 May 2022 10:31:50 -0400 Received: from esa3.hgst.iphmx.com (esa3.hgst.iphmx.com [216.71.153.141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E04C527B02 for ; Mon, 16 May 2022 07:31:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1652711508; x=1684247508; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jFTV7i7Hh3OaUG5j4fuJXk1l0TFnopVwjp9A7WCDbMM=; b=Z9KR8i6OUuVYFHUG6MKxbGRGy7gqXaqWgTE5KmUoKgDsc0LcGokNzOlT 9ik8NdNSswZR9PfiwbqsH+rLRH7WBHWww+KBogfsqkEvx8CLX4f088Jvs 9anOIiDc/48KnV3jXB/mGFcghO3ma5prnMk6aaDoCBXlc40I/OKrIRyNP CMBeFtxKUNoN4Ml8ovSuaFr293Kps+3qSonxDqgCw2Vasec/CSgeoJXKq esIn6VLnMEC5debfdl2zDpW6uXq4XwKNAHljvowkk3qgcTR1JqbBiq5qu 26dVIsGiFgJgSeKcqyPiEeWPlAYmwCEBM9aTrBeR2+M21y11qUmugRYjy Q==; X-IronPort-AV: E=Sophos;i="5.91,230,1647273600"; d="scan'208";a="205309209" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 16 May 2022 22:31:47 +0800 IronPort-SDR: MNqj4YmeN8kTBl5PL2M22/AHgawnsfsFaA+S/ELK6Q6xEWy+R62UiSjDwgy9NJPN/RS1QHIlFA B1WprAv0ezF61F/uVKxHeWzuObDiO8brz6y3fc9ENyURQCmz+7xAU7cvQ1yQx24tvADRL9JysZ nj4Srnx/ffMBuKW+1MUZYHCmsXly2Daw8XZYrZuiOhwUO6bqZvRZbH+Hoet1XUk2wMShVe7b/G 8uulSvd3CwQ7GLuqJzX5STz00B/mVXbp0ZdnA7Z+dxg+fqE5p7mXizMDjJzUUwlra1lDzBG/31 VpQBOg6x7fjJD58UgWWV1alQ Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 16 May 2022 06:57:29 -0700 IronPort-SDR: cJiXOciLLqW8t1ixOqTPTBoSRdmMsIHD7eeOGLdc421TMKDFE9gIoqfGoQHsfffpp/0opRKMv9 2se6isOQ1niKELK+FCJ0jWFdZgiB17RopIJEel5MwrlGYm+RNXVYqM9bQSdYyohiHeEdQPFKka F5FMLn73taeVMSz/pvYJb5FSjTqZOwM7GC3jTw8TtKOl6fiB+09jr3nlftJHpYTlvr54VfQ6fp pyGA3xsUIexVXxjrwGxIVPvPu+QlPqf8X+gDmhBhBrgDwU4wjEsS3RDpGiUlY/GBiov2kx1ZRY T9c= WDCIronportException: Internal Received: from unknown (HELO redsun91.ssa.fujisawa.hgst.com) ([10.149.66.72]) by uls-op-cesaip02.wdc.com with ESMTP; 16 May 2022 07:31:47 -0700 From: Johannes Thumshirn To: linux-btrfs@vger.kernel.org Cc: Johannes Thumshirn Subject: [RFC ONLY 1/8] btrfs: add raid stripe tree definitions Date: Mon, 16 May 2022 07:31:36 -0700 Message-Id: <06a217ce02243fe88b9649d689df89eea7a570c7.1652711187.git.johannes.thumshirn@wdc.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Add definitions for the raid-stripe-tree. This tree will hold informatioin about the on-disk layout of the stripes in a RAID set. Signed-off-by: Johannes Thumshirn --- fs/btrfs/ctree.h | 28 ++++++++++++++++++++++++++++ include/uapi/linux/btrfs_tree.h | 17 +++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 7328fb17b7f5..20aa2ebac7cd 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1878,6 +1878,34 @@ BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); +BTRFS_SETGET_FUNCS(stripe_extent_devid, struct btrfs_stripe_extent, devid, 64); +BTRFS_SETGET_FUNCS(stripe_extent_offset, struct btrfs_stripe_extent, offset, 64); +BTRFS_SETGET_STACK_FUNCS(stack_stripe_extent_devid, struct btrfs_stripe_extent, devid, 64); +BTRFS_SETGET_STACK_FUNCS(stack_stripe_extent_offset, struct btrfs_stripe_extent, offset, 64); + +static inline struct btrfs_stripe_extent *btrfs_stripe_extent_nr( + struct btrfs_dp_stripe *dps, int nr) +{ + unsigned long offset = (unsigned long)dps; + offset += offsetof(struct btrfs_dp_stripe, extents); + offset += nr * sizeof(struct btrfs_stripe_extent); + return (struct btrfs_stripe_extent *)offset; +} + +static inline u64 btrfs_stripe_extent_devid_nr(const struct extent_buffer *eb, + struct btrfs_dp_stripe *dps, + int nr) +{ + return btrfs_stripe_extent_devid(eb, btrfs_stripe_extent_nr(dps, nr)); +} + +static inline u64 btrfs_stripe_extent_offset_nr(const struct extent_buffer *eb, + struct btrfs_dp_stripe *dps, + int nr) +{ + return btrfs_stripe_extent_offset(eb, btrfs_stripe_extent_nr(dps, nr)); +} + /* struct btrfs_dev_extent */ BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, chunk_tree, 64); diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index b069752a8ecf..a2d28d83cc96 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -56,6 +56,9 @@ /* Holds the block group items for extent tree v2. */ #define BTRFS_BLOCK_GROUP_TREE_OBJECTID 11ULL +/* tracks RAID stripes in block groups. */ +#define BTRFS_RAID_STRIPE_TREE_OBJECTID 12ULL + /* device stats in the device tree */ #define BTRFS_DEV_STATS_OBJECTID 0ULL @@ -264,6 +267,8 @@ */ #define BTRFS_QGROUP_RELATION_KEY 246 +#define BTRFS_RAID_STRIPE_KEY 247 + /* * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY. */ @@ -488,6 +493,18 @@ struct btrfs_free_space_header { __le64 num_bitmaps; } __attribute__ ((__packed__)); +struct btrfs_stripe_extent { + /* btrfs device-id this raid extent lives on */ + __le64 devid; + /* offset from the devextent start */ + __le64 offset; +} __attribute__ ((__packed__)); + +struct btrfs_dp_stripe { + /* array of stripe extents this stripe is comprised of */ + struct btrfs_stripe_extent extents; +} __attribute__ ((__packed__)); + #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) -- 2.35.1