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113 lines
4.0 KiB
113 lines
4.0 KiB
# Copyright 1999-2023 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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inherit linux-info systemd toolchain-funcs
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DESCRIPTION="Best-Effort Extent-Same, a btrfs dedup agent"
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HOMEPAGE="https://github.com/Zygo/bees"
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if [[ ${PV} == 9999 ]] ; then
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inherit git-r3
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EGIT_REPO_URI="https://github.com/Zygo/bees.git"
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else
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SRC_URI="https://github.com/Zygo/bees/archive/v${PV}.tar.gz -> ${P}.tar.gz"
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KEYWORDS="amd64 ~arm64"
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fi
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LICENSE="GPL-3"
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SLOT="0"
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IUSE=""
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DEPEND="
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>=sys-apps/util-linux-2.30.2
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>=sys-fs/btrfs-progs-4.20.2
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"
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RDEPEND="${DEPEND}"
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CONFIG_CHECK="~BTRFS_FS"
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ERROR_BTRFS_FS="CONFIG_BTRFS_FS: bees does currently only work with btrfs"
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PATCHES=(
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"${FILESDIR}/0001-HACK-crucible-Work-around-kernel-memory-fragmentatio.patch"
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)
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pkg_pretend() {
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if [[ ${MERGE_TYPE} != buildonly ]]; then
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if kernel_is -lt 4 11; then
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ewarn "With kernel versions below 4.11, bees may severely degrade system performance"
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ewarn "and responsiveness. Especially, the kernel may deadlock while bees is"
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ewarn "running, it's recommended to run at least kernel 4.11."
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ewarn
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elif kernel_is -lt 4 14 29; then
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ewarn "With kernel versions below 4.14.29, bees may generate a lot of bogus WARN_ON()"
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ewarn "messages in the kernel log. These messages can be ignored and this is fixed"
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ewarn "with more recent kernels:"
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ewarn "# WARNING: CPU: 3 PID: 18172 at fs/btrfs/backref.c:1391 find_parent_nodes+0xc41/0x14e0"
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ewarn
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elif kernel_is -lt 5 7 0; then
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ewarn "With kernel versions below 5.4.96 and 5.7, the kernel may hold file system"
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ewarn "locks for a long time while at the same time CPU usage increases when bees is"
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ewarn "operating. bees tries to avoid this behavior by excluding very common extents"
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ewarn "from deduplication. This has only a minimal impact on dedupe effectiveness."
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ewarn
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fi
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if kernel_is -lt 5 1 0; then
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ewarn "IMPORTANT: With kernel versions below 5.1.0, you may experience data corruption"
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ewarn "due to bees using compression in btrfs. You are adviced to use a chronologically"
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ewarn "later kernel, that includes older LTS versions released after 5.0.4:"
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ewarn "Fixed in: 5.1+, 5.0.4+, 4.19.31+, 4.14.108+, 4.9.165+, 4.4.177+, 3.18.137+"
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ewarn "# commit 8e92821 btrfs: fix corruption reading shared and compressed extents after hole punching"
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ewarn
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fi
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if kernel_is -lt 5 4 19; then
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ewarn "With kernel versions below 5.4.19, bees may trigger a btrfs bug when running"
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ewarn "btrfs-balance in parallel. This may lead to meta-data corruption in the worst"
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ewarn "case. Especially, kernels 5.1.21 and 5.2.21 should be avoided. Kernels 5.0.x"
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ewarn "after 5.0.21 should be safe. In the best case, affected kernels may force"
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ewarn "the device RO without writing corrupted meta-data. More details:"
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ewarn "https://github.com/Zygo/bees/blob/master/docs/btrfs-kernel.md"
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ewarn
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fi
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if kernel_is -gt 5 15 106; then
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if kernel_is -lt 6 3 10; then
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ewarn "With kernel versions 5.15.107 or later, there is a memory fragmentation"
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ewarn "issue with LOGICAL_INO which can lead to cache thrashing and cause IO"
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ewarn "latency spikes. This version ships with a work-around at the cost of not"
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ewarn "handling highly duplicated filesystems that well. More details:"
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ewarn "https://github.com/Zygo/bees/issues/260"
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ewarn
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fi
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fi
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elog "Bees recommends running the latest current kernel for performance and"
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elog "reliability reasons, see README.md."
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fi
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}
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src_prepare() {
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default
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sed -i 's/ -Werror//' makeflags || die
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}
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src_configure() {
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tc-export CC CXX AR
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cat >localconf <<-EOF || die
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ETC_PREFIX="${EPREFIX}/etc"
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LIBEXEC_PREFIX="${EPREFIX}/usr/libexec"
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PREFIX="${EPREFIX}/usr"
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SYSTEMD_SYSTEM_UNIT_DIR="$(systemd_get_systemunitdir)"
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DEFAULT_MAKE_TARGET=all
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EOF
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if [[ ${PV} != "9999" ]] ; then
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echo BEES_VERSION=v${PV} >>localconf || die
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fi
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}
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src_compile() {
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default
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# localconf quotes leak in the systemd unit but are still needed for spaces
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sed -i 's/"//g' scripts/beesd@.service || die
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}
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