app-emulation/lxc: add io-uring patches for 4.0.11

Bug: https://bugs.gentoo.org/820545
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

3 files changed, 245 insertions, 0 deletions

diff --git a/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync1.patch b/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync1.patch
new file mode 100644
index 000000000000..cd497a755523
--- /dev/null
+++ b/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync1.patch
@@ -0,0 +1,29 @@
+From aac3f106ff012e1d6835b20c250dcf09c364530c Mon Sep 17 00:00:00 2001
+From: Christian Brauner <christian.brauner@ubuntu.com>
+Date: Thu, 28 Oct 2021 17:39:11 +0200
+Subject: [PATCH] mainloop: make sure that descr->ring is allocated
+
+This is future proofing more than anything else.
+
+Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
+---
+ src/lxc/mainloop.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/src/lxc/mainloop.c b/src/lxc/mainloop.c
+index 7c8f5d86af..17a4d55293 100644
+--- a/src/lxc/mainloop.c
++++ b/src/lxc/mainloop.c
+@@ -515,8 +515,10 @@ void lxc_mainloop_close(struct lxc_async_descr *descr)
+ 
+ 	if (descr->type == LXC_MAINLOOP_IO_URING) {
+ #if HAVE_LIBURING
+-		io_uring_queue_exit(descr->ring);
+-		munmap(descr->ring, sizeof(struct io_uring));
++		if (descr->ring) {
++			io_uring_queue_exit(descr->ring);
++			munmap(descr->ring, sizeof(struct io_uring));
++		}
+ #else
+ 		ERROR("Unsupported io_uring mainloop");
+ #endif
diff --git a/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync2.patch b/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync2.patch
new file mode 100644
index 000000000000..33b8554193d3
--- /dev/null
+++ b/app-emulation/lxc/files/lxc-4.0.11_p1-liburing-sync2.patch
@@ -0,0 +1,28 @@
+From a585382b972c25ee8489147d94918d001ef439a7 Mon Sep 17 00:00:00 2001
+From: Christian Brauner <christian.brauner@ubuntu.com>
+Date: Thu, 28 Oct 2021 17:39:42 +0200
+Subject: [PATCH] start: check event loop type before closing fd
+
+Since this is a union we might otherwise stomp on io_uring mmap()ed
+memory.
+
+Fixes: #4016
+Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
+---
+ src/lxc/start.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/lxc/start.c b/src/lxc/start.c
+index 8f7173ec8c..1a6046c7a4 100644
+--- a/src/lxc/start.c
++++ b/src/lxc/start.c
+@@ -629,7 +629,8 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
+ 	TRACE("Mainloop is ready");
+ 
+ 	ret = lxc_mainloop(&descr, -1);
+-	close_prot_errno_disarm(descr.epfd);
++	if (descr.type == LXC_MAINLOOP_EPOLL)
++		close_prot_errno_disarm(descr.epfd);
+ 	if (ret < 0 || !handler->init_died)
+ 		goto out_mainloop_console;
+ 
diff --git a/app-emulation/lxc/lxc-4.0.11_p1.ebuild b/app-emulation/lxc/lxc-4.0.11_p1.ebuild
new file mode 100644
index 000000000000..e7de06da0aee
--- /dev/null
+++ b/app-emulation/lxc/lxc-4.0.11_p1.ebuild
@@ -0,0 +1,188 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools bash-completion-r1 linux-info flag-o-matic optfeature pam readme.gentoo-r1 systemd verify-sig
+
+DESCRIPTION="A userspace interface for the Linux kernel containment features"
+HOMEPAGE="https://linuxcontainers.org/ https://github.com/lxc/lxc"
+SRC_URI="https://linuxcontainers.org/downloads/lxc/${P/_p1}.tar.gz
+	verify-sig? ( https://linuxcontainers.org/downloads/lxc/${P/_p1}.tar.gz.asc )"
+
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~riscv ~x86"
+
+LICENSE="GPL-2 LGPL-2.1 LGPL-3"
+SLOT="0"
+IUSE="apparmor +caps doc io-uring man pam seccomp selinux +ssl +tools verify-sig"
+
+RDEPEND="acct-group/lxc
+	acct-user/lxc
+	app-misc/pax-utils
+	sys-apps/util-linux
+	sys-libs/libcap
+	virtual/awk
+	caps? ( sys-libs/libcap )
+	io-uring? ( sys-libs/liburing:= )
+	pam? ( sys-libs/pam )
+	seccomp? ( sys-libs/libseccomp )
+	selinux? ( sys-libs/libselinux )
+	ssl? (
+		dev-libs/openssl:0=
+	)"
+DEPEND="${RDEPEND}
+	>=sys-kernel/linux-headers-4
+	apparmor? ( sys-apps/apparmor )"
+BDEPEND="virtual/pkgconfig
+	doc? ( app-doc/doxygen[dot] )
+	man? ( app-text/docbook-sgml-utils )
+	verify-sig? ( app-crypt/openpgp-keys-linuxcontainers )"
+
+CONFIG_CHECK="~!NETPRIO_CGROUP
+	~CGROUPS
+	~CGROUP_CPUACCT
+	~CGROUP_DEVICE
+	~CGROUP_FREEZER
+
+	~CGROUP_SCHED
+	~CPUSETS
+	~IPC_NS
+	~MACVLAN
+
+	~MEMCG
+	~NAMESPACES
+	~NET_NS
+	~PID_NS
+
+	~POSIX_MQUEUE
+	~USER_NS
+	~UTS_NS
+	~VETH"
+
+ERROR_CGROUP_FREEZER="CONFIG_CGROUP_FREEZER: needed to freeze containers"
+ERROR_MACVLAN="CONFIG_MACVLAN: needed for internal (inter-container) networking"
+ERROR_MEMCG="CONFIG_MEMCG: needed for memory resource control in containers"
+ERROR_NET_NS="CONFIG_NET_NS: needed for unshared network"
+ERROR_POSIX_MQUEUE="CONFIG_POSIX_MQUEUE: needed for lxc-execute command"
+ERROR_UTS_NS="CONFIG_UTS_NS: needed to unshare hostnames and uname info"
+ERROR_VETH="CONFIG_VETH: needed for internal (host-to-container) networking"
+
+DOCS=( AUTHORS CONTRIBUTING MAINTAINERS NEWS README doc/FAQ.txt )
+
+pkg_setup() {
+	linux-info_pkg_setup
+}
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.0.5-omit-sysconfig.patch # bug 558854
+	"${FILESDIR}"/${P}-liburing-sync1.patch #820545
+	"${FILESDIR}"/${P}-liburing-sync2.patch #820545
+)
+
+VERIFY_SIG_OPENPGP_KEY_PATH=${BROOT}/usr/share/openpgp-keys/linuxcontainers.asc
+
+S="${WORKDIR}/${PN}-${PV/_p1}"
+
+src_prepare() {
+	default
+
+	export bashcompdir="/etc/bash_completion.d"
+	eautoreconf
+}
+
+src_configure() {
+	append-flags -fno-strict-aliasing
+
+	local myeconfargs=(
+		--bindir=/usr/bin
+		--localstatedir=/var
+		--sbindir=/usr/bin
+
+		--with-config-path=/var/lib/lxc
+		--with-distro=gentoo
+		--with-init-script=systemd
+		--with-rootfs-path=/var/lib/lxc/rootfs
+		--with-runtime-path=/run
+		--with-systemdsystemunitdir=$(systemd_get_systemunitdir)
+
+		--disable-coverity-build
+		--disable-dlog
+		--disable-fuzzers
+		--disable-mutex-debugging
+		--disable-no-undefined
+		--disable-rpath
+		--disable-sanitizers
+		--disable-tests
+		--disable-werror
+
+		--enable-bash
+		--enable-commands
+		--enable-memfd-rexec
+		--enable-thread-safety
+
+		$(use_enable apparmor)
+		$(use_enable caps capabilities)
+		$(use_enable doc api-docs)
+		$(use_enable doc examples)
+		$(use_enable io-uring liburing)
+		$(use_enable man doc)
+		$(use_enable pam)
+		$(use_enable seccomp)
+		$(use_enable selinux)
+		$(use_enable ssl openssl)
+		$(use_enable tools)
+
+		$(use_with pam pamdir $(getpam_mod_dir))
+	)
+
+	econf "${myeconfargs[@]}"
+}
+
+src_install() {
+	default
+
+	# The main bash-completion file will collide with lxd, need to relocate and update symlinks.
+	mkdir -p "${ED}"/$(get_bashcompdir) || die "Failed to create bashcompdir."
+	mv "${ED}"/etc/bash_completion.d/lxc "${ED}"/$(get_bashcompdir)/lxc-start || die "Failed to relocate lxc bash-completion file."
+	rm -r "${ED}"/etc/bash_completion.d || die "Failed to remove wrong bash_completion.d content."
+
+	if use tools; then
+		bashcomp_alias lxc-start lxc-{attach,cgroup,copy,console,create,destroy,device,execute,freeze,info,monitor,snapshot,stop,unfreeze,usernsexec,wait}
+	else
+		bashcomp_alias lxc-start lxc-usernsexec
+	fi
+
+	keepdir /etc/lxc /var/lib/lxc/rootfs /var/log/lxc
+	rmdir "${D}"/var/cache/lxc "${D}"/var/cache || die "rmdir failed"
+
+	find "${D}" -name '*.la' -delete -o -name '*.a' -delete || die
+
+	# Gentoo-specific additions!
+	newinitd "${FILESDIR}/lxc.initd.8" lxc
+
+	# Remember to compare our systemd unit file with the upstream one
+	# config/init/systemd/lxc.service.in
+	systemd_newunit "${FILESDIR}"/lxc_at.service.4.0.0 "lxc@.service"
+
+	DOC_CONTENTS="
+		For openrc, there is an init script provided with the package.
+		You should only need to symlink /etc/init.d/lxc to
+		/etc/init.d/lxc.configname to start the container defined in
+		/etc/lxc/configname.conf.
+
+		Correspondingly, for systemd a service file lxc@.service is installed.
+		Enable and start lxc@configname in order to start the container defined
+		in /etc/lxc/configname.conf."
+	DISABLE_AUTOFORMATTING=true
+	readme.gentoo_create_doc
+}
+
+pkg_postinst() {
+	readme.gentoo_print_elog
+
+	elog "Please run 'lxc-checkconfig' to see optional kernel features."
+	elog
+	optfeature "automatic template scripts" app-emulation/lxc-templates
+	optfeature "Debian-based distribution container image support" dev-util/debootstrap
+	optfeature "snapshot & restore functionality" sys-process/criu
+}