From nobody Fri Nov 29 20:54:03 2024 Received: from mail.tlmp.cc (unknown [148.135.17.20]) (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 54199161311; Mon, 16 Sep 2024 13:57:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.135.17.20 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726495021; cv=none; b=GnQC4X4oW5Bi5IotDC9Klg/J+Q9kPbdGJEsqY+JWKaHri5xA85fzXTVxOq8VW9p6CVmFaNGMe3dq1Ad8kSBP5pjhaGqBc5D2dlp1fMrcp+IVRI98nPgf2dCTO+BN7aIVWANpHePb2UnGQ/wita1FmUz0m4KDbXhT4iN1Za7z27A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726495021; c=relaxed/simple; bh=zTenHNDq1t83FwjgBfBRxwlMMD2Xhmw6ZkqOIIf8dik=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=L3rWgRXU8qbRkNKNX5tQAyL13erKjvPz4QOX5WZEzarRzdtp2qg2hK92jjD+xu9syzqBXR6UhsRYQY5PQw/1OpfD3qpSRijuCm+q7kkgbWQZULolPdwusy/M0jM3l/KJr7P6PCW/rTrI0xyRkimHDP2p78O8pgqjwNzNvseZLUo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=tlmp.cc; spf=pass smtp.mailfrom=tlmp.cc; dkim=pass (2048-bit key) header.d=tlmp.cc header.i=@tlmp.cc header.b=CFSckmI4; arc=none smtp.client-ip=148.135.17.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=tlmp.cc Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tlmp.cc Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tlmp.cc header.i=@tlmp.cc header.b="CFSckmI4" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 93C2F69845; Mon, 16 Sep 2024 09:56:58 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tlmp.cc; s=dkim; t=1726495019; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=F4hCBD/QFnbrfenytYFFJtYuvUkCDWy+jx5tXlowPUM=; b=CFSckmI4MUIPR9slBm8hO8DjCiZn8m3HjPaYgOVerbk8DEmUgIw9uVE85dm47JHVK0OQRI 7MYVXmNEFJPIsUqwcQSjbSDy9kw0KiMRFJI3H8Sz5YX+L+ej0GwV0nO3CoNFUn3k5VxnSK 8qCd3dKrDlY0aHo/90jKK/JJPfpi9WEFuS6Fy7eBnf38yI19S8LRwlIX6JVJJdAEHoKHDN WxP4HdUszJkuV08+XnKywMarGNMRm+QUOaaHev8dWlo5IcOJ8vIVc95+MfymXlzX/NKIvu K74GHUrHa3tW2dGbB7fbdK7GPji0+dCARhAzmPwA7yOy8HCN76mzygKk7gA5YA== From: Yiyang Wu To: linux-erofs@lists.ozlabs.org Cc: rust-for-linux@vger.kernel.org, linux-fsdevel@vger.kernel.org, LKML Subject: [RFC PATCH 11/24] erofs: add map data structure in Rust Date: Mon, 16 Sep 2024 21:56:21 +0800 Message-ID: <20240916135634.98554-12-toolmanp@tlmp.cc> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240916135634.98554-1-toolmanp@tlmp.cc> References: <20240916135634.98554-1-toolmanp@tlmp.cc> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Content-Type: text/plain; charset="utf-8" This patch introduce core map flags and runtime map data structure in Rust. This will later be used to do iomapping. Signed-off-by: Yiyang Wu --- fs/erofs/rust/erofs_sys.rs | 1 + fs/erofs/rust/erofs_sys/map.rs | 45 ++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 fs/erofs/rust/erofs_sys/map.rs diff --git a/fs/erofs/rust/erofs_sys.rs b/fs/erofs/rust/erofs_sys.rs index f1a1e491caec..15ed65866097 100644 --- a/fs/erofs/rust/erofs_sys.rs +++ b/fs/erofs/rust/erofs_sys.rs @@ -28,6 +28,7 @@ pub(crate) mod devices; pub(crate) mod errnos; pub(crate) mod inode; +pub(crate) mod map; pub(crate) mod superblock; pub(crate) mod xattrs; pub(crate) use errnos::Errno; diff --git a/fs/erofs/rust/erofs_sys/map.rs b/fs/erofs/rust/erofs_sys/map.rs new file mode 100644 index 000000000000..757e8083c8f1 --- /dev/null +++ b/fs/erofs/rust/erofs_sys/map.rs @@ -0,0 +1,45 @@ +// Copyright 2024 Yiyang Wu +// SPDX-License-Identifier: MIT or GPL-2.0-or-later + +use super::*; +pub(crate) const MAP_MAPPED: u32 =3D 0x0001; +pub(crate) const MAP_META: u32 =3D 0x0002; +pub(crate) const MAP_ENCODED: u32 =3D 0x0004; +pub(crate) const MAP_FULL_MAPPED: u32 =3D 0x0008; +pub(crate) const MAP_FRAGMENT: u32 =3D 0x0010; +pub(crate) const MAP_PARTIAL_REF: u32 =3D 0x0020; + +#[derive(Debug, Default)] +#[repr(C)] +pub(crate) struct Segment { + pub(crate) start: Off, + pub(crate) len: Off, +} + +#[derive(Debug, Default)] +#[repr(C)] +pub(crate) struct Map { + pub(crate) logical: Segment, + pub(crate) physical: Segment, + pub(crate) device_id: u16, + pub(crate) algorithm_format: u16, + pub(crate) map_type: MapType, +} + +#[derive(Debug, Default)] +pub(crate) enum MapType { + Meta, + #[default] + Normal, +} + +impl From for u32 { + fn from(value: MapType) -> Self { + match value { + MapType::Meta =3D> MAP_META | MAP_MAPPED, + MapType::Normal =3D> MAP_MAPPED, + } + } +} + +pub(crate) type MapResult =3D PosixResult; --=20 2.46.0