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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit linux-info
DESCRIPTION="Best-Effort Extent-Same, a btrfs dedup agent"
HOMEPAGE="https://github.com/Zygo/bees"
if [[ ${PV} == "9999" ]] ; then
EGIT_REPO_URI="https://github.com/Zygo/bees.git"
inherit git-r3
else
SRC_URI="https://github.com/Zygo/bees/archive/v${PV}.tar.gz -> ${P}.tar.gz"
KEYWORDS="~amd64"
fi
LICENSE="GPL-3"
SLOT="0"
IUSE="tools"
DEPEND="
>=sys-apps/util-linux-2.30.2
>=sys-fs/btrfs-progs-4.20.2
"
RDEPEND="${DEPEND}"
CONFIG_CHECK="~BTRFS_FS"
ERROR_BTRFS_FS="CONFIG_BTRFS_FS: bees does currently only work with btrfs"
pkg_pretend() {
if [[ ${MERGE_TYPE} != buildonly ]]; then
if kernel_is -lt 4 4 3; then
ewarn "Kernel versions below 4.4.3 lack critical features needed for bees to"
ewarn "properly operate, so it won't work. It's recommended to run at least"
ewarn "kernel version 4.11 for best performance and reliability."
ewarn
elif kernel_is -lt 4 11; then
ewarn "With kernel versions below 4.11, bees may severely degrade system performance"
ewarn "and responsiveness. Especially, the kernel may deadlock while bees is"
ewarn "running, it's recommended to run at least kernel 4.11."
ewarn
elif kernel_is -lt 4 14 29; then
ewarn "With kernel versions below 4.14.29, bees may generate a lot of bogus WARN_ON()"
ewarn "messages in the kernel log. These messages can be ignored and this is fixed"
ewarn "with more recent kernels:"
ewarn "# WARNING: CPU: 3 PID: 18172 at fs/btrfs/backref.c:1391 find_parent_nodes+0xc41/0x14e0"
ewarn
fi
if kernel_is -lt 5 3 4; then
ewarn "With kernel versions below 5.3.4, bees may trigger a btrfs bug when running"
ewarn "btrfs-balance in parallel. This may lead to meta-data corruption in the worst"
ewarn "case. Especially, kernels 5.1.21 and 5.2.21 should be avoided. Kernels 5.0.x"
ewarn "after 5.0.21 should be safe. In the best case, affected kernels may force"
ewarn "the device RO without writing corrupted meta-data. More details:"
ewarn "https://github.com/Zygo/bees/blob/master/docs/btrfs-kernel.md"
ewarn
fi
if kernel_is -lt 5 0 4; then
ewarn "IMPORTANT: With kernel versions below 5.0.4, you may experience data corruption"
ewarn "due to bees using compression in btrfs. You are adviced to use a chronologically"
ewarn "later kernel, that includes older LTS versions released after 5.0.4:"
ewarn "Fixed in: 5.1+, 5.0.4+, 4.19.31+, 4.14.108+, 4.9.165+, 4.4.177+, 3.18.137+"
ewarn "# commit 8e92821 btrfs: fix corruption reading shared and compressed extents after hole punching"
ewarn
fi
elog "Bees recommends running the latest current kernel for performance and"
elog "reliability reasons, see README.md."
fi
}
src_configure() {
cat >localconf <<-EOF || die
LIBEXEC_PREFIX=/usr/libexec
PREFIX=/usr
LIBDIR=$(get_libdir)
DEFAULT_MAKE_TARGET=all
EOF
if [[ ${PV} != "9999" ]] ; then
cat >>localconf <<-EOF || die
BEES_VERSION=v${PV}
EOF
fi
if use tools; then
echo OPTIONAL_INSTALL_TARGETS=install_tools >>localconf || die
fi
}
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