From b6c471fd617d26fbd3abf767bc26c0080b096470 Mon Sep 17 00:00:00 2001 From: Viacheslav Hletenko Date: Sat, 4 Nov 2023 12:15:38 +0000 Subject: T5706: Add custom systemd udev rules to exclude dynamic interfaces Add custom systemd udev rules to exclude some regular and dynamic interfaces from "systemd-sysctl" calls. It fixes high CPU utilization (100%) as we have a lot of calls per interface for dynamic interfaces like ppp|ipoe|sstp etc. /lib/systemd/systemd-udevd should not be called for those interfaces (cherry picked from commit ca9cc86233520eb495c17602bf7a110094c1d8e7) --- src/etc/udev/rules.d/99-vyos-systemd.rules | 79 ++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 src/etc/udev/rules.d/99-vyos-systemd.rules (limited to 'src') diff --git a/src/etc/udev/rules.d/99-vyos-systemd.rules b/src/etc/udev/rules.d/99-vyos-systemd.rules new file mode 100644 index 000000000..54aea668c --- /dev/null +++ b/src/etc/udev/rules.d/99-vyos-systemd.rules @@ -0,0 +1,79 @@ +# The main reason that we store this file is systemd-udevd interfaces excludes +# /lib/systemd/systemd-sysctl for dynamic interfaces (ppp|ipoe|l2tp etc) + +ACTION=="remove", GOTO="systemd_end" + +SUBSYSTEM=="tty", KERNEL=="tty[a-zA-Z]*|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*|3270/tty[0-9]*", TAG+="systemd" +KERNEL=="vport*", TAG+="systemd" + +SUBSYSTEM=="ptp", TAG+="systemd" + +SUBSYSTEM=="ubi", TAG+="systemd" + +SUBSYSTEM=="block", TAG+="systemd" + +# We can't make any conclusions about suspended DM devices so let's just import previous SYSTEMD_READY state and skip other rules +SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", IMPORT{db}="SYSTEMD_READY", GOTO="systemd_end" +SUBSYSTEM=="block", ACTION=="add", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", ENV{SYSTEMD_READY}="0" + +# Ignore encrypted devices with no identified superblock on it, since +# we are probably still calling mke2fs or mkswap on it. +SUBSYSTEM=="block", ENV{DM_UUID}=="CRYPT-*", ENV{ID_PART_TABLE_TYPE}=="", ENV{ID_FS_USAGE}=="", ENV{SYSTEMD_READY}="0" + +# Explicitly set SYSTEMD_READY=1 for DM devices that don't have it set yet, so that we always have something to import above +SUBSYSTEM=="block", ENV{DM_UUID}=="?*", ENV{SYSTEMD_READY}=="", ENV{SYSTEMD_READY}="1" + +# add symlink to GPT root disk +SUBSYSTEM=="block", ENV{ID_PART_GPT_AUTO_ROOT}=="1", ENV{ID_FS_TYPE}!="crypto_LUKS", SYMLINK+="gpt-auto-root" +SUBSYSTEM=="block", ENV{ID_PART_GPT_AUTO_ROOT}=="1", ENV{ID_FS_TYPE}=="crypto_LUKS", SYMLINK+="gpt-auto-root-luks" +SUBSYSTEM=="block", ENV{DM_UUID}=="CRYPT-*", ENV{DM_NAME}=="root", SYMLINK+="gpt-auto-root" + +# Ignore raid devices that are not yet assembled and started +SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="md*", TEST!="md/array_state", ENV{SYSTEMD_READY}="0" +SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="md*", ATTR{md/array_state}=="|clear|inactive", ENV{SYSTEMD_READY}="0" + +# Ignore loop devices that don't have any file attached +SUBSYSTEM=="block", KERNEL=="loop[0-9]*", ENV{DEVTYPE}=="disk", TEST!="loop/backing_file", ENV{SYSTEMD_READY}="0" + +# Ignore nbd devices until the PID file exists (which signals a connected device) +SUBSYSTEM=="block", KERNEL=="nbd*", ENV{DEVTYPE}=="disk", TEST!="pid", ENV{SYSTEMD_READY}="0" + +# We need a hardware independent way to identify network devices. We +# use the /sys/subsystem/ path for this. Kernel "bus" and "class" names +# should be treated as one namespace, like udev handles it. This is mostly +# just an identification string for systemd, so whether the path actually is +# accessible or not does not matter as long as it is unique and in the +# filesystem namespace. + +SUBSYSTEM=="net", KERNEL!="lo", TAG+="systemd", ENV{SYSTEMD_ALIAS}+="/sys/subsystem/net/devices/$name" +SUBSYSTEM=="bluetooth", TAG+="systemd", ENV{SYSTEMD_ALIAS}+="/sys/subsystem/bluetooth/devices/%k", \ + ENV{SYSTEMD_WANTS}+="bluetooth.target", ENV{SYSTEMD_USER_WANTS}+="bluetooth.target" + +ENV{ID_SMARTCARD_READER}=="?*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="smartcard.target", ENV{SYSTEMD_USER_WANTS}+="smartcard.target" +SUBSYSTEM=="sound", KERNEL=="controlC*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="sound.target", ENV{SYSTEMD_USER_WANTS}+="sound.target" + +SUBSYSTEM=="printer", TAG+="systemd", ENV{SYSTEMD_WANTS}+="printer.target", ENV{SYSTEMD_USER_WANTS}+="printer.target" +SUBSYSTEM=="usb", KERNEL=="lp*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="printer.target", ENV{SYSTEMD_USER_WANTS}+="printer.target" +SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ENV{ID_USB_INTERFACES}=="*:0701??:*", TAG+="systemd", ENV{SYSTEMD_WANTS}+="printer.target", ENV{SYSTEMD_USER_WANTS}+="printer.target" + +SUBSYSTEM=="udc", ACTION=="add", TAG+="systemd", ENV{SYSTEMD_WANTS}+="usb-gadget.target" + +# Apply sysctl variables to network devices (and only to those) as they appear. +# T5706. Exclude: lo, dummy*, ppp*, ipoe*, l2tp*, pptp*, sslvpn* and sstp*. +ACTION=="add", SUBSYSTEM=="net", KERNEL!="lo|dummy*|ppp*|ipoe*|l2tp*|pptp*|sslvpn*|sstp*", RUN+="/lib/systemd/systemd-sysctl --prefix=/net/ipv4/conf/$name --prefix=/net/ipv4/neigh/$name --prefix=/net/ipv6/conf/$name --prefix=/net/ipv6/neigh/$name" + +# Pull in backlight save/restore for all backlight devices and +# keyboard backlights +SUBSYSTEM=="backlight", TAG+="systemd", IMPORT{builtin}="path_id", ENV{SYSTEMD_WANTS}+="systemd-backlight@backlight:$name.service" +SUBSYSTEM=="leds", KERNEL=="*kbd_backlight", TAG+="systemd", IMPORT{builtin}="path_id", ENV{SYSTEMD_WANTS}+="systemd-backlight@leds:$name.service" + +# Pull in rfkill save/restore for all rfkill devices +SUBSYSTEM=="rfkill", ENV{SYSTEMD_RFKILL}="1" +SUBSYSTEM=="rfkill", IMPORT{builtin}="path_id" +SUBSYSTEM=="misc", KERNEL=="rfkill", TAG+="systemd", ENV{SYSTEMD_WANTS}+="systemd-rfkill.socket" + +# Asynchronously mount file systems implemented by these modules as soon as they are loaded. +SUBSYSTEM=="module", KERNEL=="fuse", TAG+="systemd", ENV{SYSTEMD_WANTS}+="sys-fs-fuse-connections.mount" +SUBSYSTEM=="module", KERNEL=="configfs", TAG+="systemd", ENV{SYSTEMD_WANTS}+="sys-kernel-config.mount" + +LABEL="systemd_end" -- cgit v1.2.3