5446b0a065
Support loading livepatched kernel modules as the specific order instead
of the original way which was alphabetical order.
TestPlan:
PASS: build-pkgs -c -p kpatch
PASS: build-image
PASS: Install the iso image both for std and lowlatency then login
PASS: 'kpatch install [rt-]livepatch-meminfo-string-example.ko' and
'kpatch load --all' with adding the content in the config file
/etc/kpatch-load.conf
Story: 2009221
Task: 44580
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Change-Id: Ib4ec9d3d43d95afc2e381614da0cd5c45c9f1b02
160 lines
4.9 KiB
Diff
160 lines
4.9 KiB
Diff
From 458e83d02810ee2697b509bf4ea30c570a5151ed Mon Sep 17 00:00:00 2001
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From: Zhixiong Chi <zhixiong.chi@windriver.com>
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Date: Wed, 26 Oct 2022 00:58:41 -0700
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Subject: [PATCH] kpatch: Support the customized order for module load
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With adding the configfile, now we can use customized order to load
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the livepatched kernel modules instead of the original alphabetical
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order when the command 'kpatch load --all' is executed.
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If the configfile is empty, then the behavior is still to load the
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module as the original style(alphabetical order).
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The first column in the config file is the module to be loaded.
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The second column is the dependency which must be loaded first, and
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it can be ignored if the dependency is null.
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Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
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---
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Makefile.inc | 1 +
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contrib/Makefile | 3 ++
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contrib/kpatch-load.conf | 5 ++++
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kpatch/kpatch | 59 ++++++++++++++++++++++++++++++++++++----
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4 files changed, 63 insertions(+), 5 deletions(-)
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create mode 100644 contrib/kpatch-load.conf
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diff --git a/Makefile.inc b/Makefile.inc
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index 259127c..8280182 100644
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--- a/Makefile.inc
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+++ b/Makefile.inc
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@@ -15,6 +15,7 @@ LIBEXECDIR = $(DESTDIR)$(PREFIX)/$(LIBEXEC)/kpatch
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DATADIR = $(DESTDIR)$(PREFIX)/share/kpatch
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MANDIR = $(DESTDIR)$(PREFIX)/share/man/man1
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SYSTEMDDIR = $(DESTDIR)$(PREFIX)/lib/systemd/system
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+SYSCONFDIR = $(DESTDIR)/etc
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UPSTARTDIR = $(DESTDIR)/etc/init
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LOCALSTATEDIR = $(DESTDIR)/var
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diff --git a/contrib/Makefile b/contrib/Makefile
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index 0b0eeeb..1e43b39 100644
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--- a/contrib/Makefile
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+++ b/contrib/Makefile
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@@ -9,9 +9,12 @@ install: all
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$(INSTALL) -d $(UPSTARTDIR)
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$(INSTALL) -m 0644 kpatch.conf $(UPSTARTDIR)
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sed -i 's~PREFIX~$(PREFIX)~' $(UPSTARTDIR)/kpatch.conf
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+ $(INSTALL) -d $(SYSCONFDIR)
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+ $(INSTALL) -m 0644 kpatch-load.conf $(SYSCONFDIR)
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uninstall:
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$(RM) $(SYSTEMDDIR)/kpatch.service
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$(RM) $(UPSTARTDIR)/kpatch.conf
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+ $(RM) $(SYSCONFDIR)/kpatch-load.conf
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clean:
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diff --git a/contrib/kpatch-load.conf b/contrib/kpatch-load.conf
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new file mode 100644
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index 0000000..fdaebb0
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--- /dev/null
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+++ b/contrib/kpatch-load.conf
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@@ -0,0 +1,5 @@
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+# Please write the whole filename including .ko
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+# InstallMod Dependmod1,Dependmod2
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+# eg: abc.ko
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+# eg: abc.ko def.ko
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+# eg: abc.ko def.ko,ghi.ko
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diff --git a/kpatch/kpatch b/kpatch/kpatch
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index e4624f5..4b65892 100755
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--- a/kpatch/kpatch
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+++ b/kpatch/kpatch
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@@ -23,7 +23,8 @@
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# This is the kpatch user script that manages installing, loading, and
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# displaying information about kernel patch modules installed on the system.
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-INSTALLDIR=/var/lib/kpatch
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+INSTALLDIR="/var/lib/kpatch"
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+CONFIGFILE="/etc/kpatch-load.conf"
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SCRIPTDIR="$(readlink -f "$(dirname "$(type -p "$0")")")"
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VERSION="0.9.5"
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POST_ENABLE_WAIT=15 # seconds
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@@ -67,6 +68,15 @@ warn() {
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echo "kpatch: $*" >&2
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}
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+warn_load() {
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+ local tty_specific_colour_on tty_specific_colour_off
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+ if [[ -t 2 ]] ; then
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+ tty_specific_colour_on=$'\033[1;33m'
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+ tty_specific_colour_off=$'\033[0m'
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+ fi
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+ echo "${tty_specific_colour_on}kpatch: $*${tty_specific_colour_off}" >&2
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+}
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+
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die() {
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warn "$@"
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exit 1
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@@ -443,6 +453,18 @@ get_module_version() {
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MODVER="${MODVER/ */}"
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}
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+is_installed() {
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+ local RDEPS=$1
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+ for item in "${RDEPS[@]}"; do
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+ item="${item%*.ko}"
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+ if ! lsmod | awk '{print $1}' | grep -q "${item//-/_}"; then
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+ warn_load "Module Dependency: ${item} Is Not Loaded!"
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+ return 1
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+ fi
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+ done
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+ return 0
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+}
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+
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unset MODULE
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# Initialize the $SYSFS var. This only works if the core module has been
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@@ -456,10 +478,37 @@ case "$1" in
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[[ "$#" -ne 2 ]] && usage
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case "$2" in
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"--all")
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- for i in "$INSTALLDIR/$(uname -r)"/*.ko; do
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- [[ -e "$i" ]] || continue
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- load_module "$i" || die "failed to load module $i"
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- done
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+ [[ -e "${CONFIGFILE}" ]] || die "Kpatch modules load configfile ${CONFIGFILE} could NOT be found!"
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+ if [[ -n $(awk '{if(!NF || /^#/){next}}1' "${CONFIGFILE}") ]]; then
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+ awk '{if(!NF || /^#/){next}}1' "${CONFIGFILE}" | while read -r line; do
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+ INSTALLMOD=${line%% *}
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+ RDEPSMODS=${line#*.ko}
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+ RDEPS_ARRAY=$(echo "${RDEPSMODS}" | tr ',' ' ')
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+
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+ if [[ "${INSTALLMOD: -3}" != ".ko" ]]; then
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+ warn_load "Module ${INSTALLMOD} missing .ko filename suffix"
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+ continue
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+ fi
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+
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+ if [[ ! -e "${INSTALLDIR}/$(uname -r)/${INSTALLMOD}" ]]; then
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+ warn_load "Skipping ${INSTALLMOD}, cannot find it in ${INSTALLDIR}/$(uname -r)/"
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+ continue
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+ fi
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+
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+ if [[ "${RDEPS_ARRAY}" ]] && ! is_installed "${RDEPS_ARRAY}"; then
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+ warn_load "Skipping load of ${INSTALLMOD} due to missing dependency module(s)"
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+ continue
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+ fi
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+
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+ MOD_FULLPATH="${INSTALLDIR}/$(uname -r)/${INSTALLMOD}"
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+ load_module "${MOD_FULLPATH}" || die "Failed to load module ${MOD_FULLPATH}"
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+ done
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+ else
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+ for i in "${INSTALLDIR}/$(uname -r)"/*.ko; do
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+ [[ -e "${i}" ]] || continue
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+ load_module "${i}" || die "Failed to load module ${i}"
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+ done
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+ fi
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;;
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*)
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PATCH="$2"
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--
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2.25.1
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