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init+cbfs-init: refactor and explain why quiet mode cannot suppress measurements of cbfs-init extracted+measured TPM stuff if not in board config
Signed-off-by: Thierry Laurion <insurgo@riseup.net>
This commit is contained in:
Thierry Laurion
parent
08f52af033
commit
b5c24f2447
@ -2,6 +2,13 @@
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set -e -o pipefail
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. /etc/functions
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# CBFS extraction and measurement
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# This extraction and measurement cannot be suppressed by quiet mode, since
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# config.user is not yet loaded at this point.
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# To suppress this output, set CONFIG_QUIET_MODE=y needs be be set in /etc/config
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# which is defined at buiid time under board configuration file to be part of initrd.cpio
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# This script is called from initrd/init
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TRACE_FUNC
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# Update initrd with CBFS files
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145
initrd/init
145
initrd/init
@ -3,7 +3,7 @@
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# ash. Calls to bash scripts must be guarded by checking config.
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mknod /dev/ttyprintk c 5 3
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echo "hello world" > /dev/ttyprintk
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echo "hello world" >/dev/ttyprintk
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# Setup our path
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export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin
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@ -43,7 +43,7 @@ mkdir -p /tmp/secret
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# Now it is safe to print a banner
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if [ -r /etc/motd ]; then
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cat /etc/motd > /dev/tty0
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cat /etc/motd >/dev/tty0
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fi
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# Load the date from the hardware clock, setting it in local time
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@ -55,30 +55,67 @@ hwclock -l -s
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# filesystem after exFAT is iso9660, move exFAT last.
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(grep -v '^\texfat$' /proc/filesystems && echo -e '\texfat') >/etc/filesystems
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# Read the system configuration parameters
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. /etc/functions
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# Read the system configuration parameters from build time board configuration
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. /etc/config
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# import global functions
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. /etc/functions
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# report if we are in quiet mode, tell logs available under /tmp/debug.log
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if [ "$CONFIG_QUIET_MODE" = "y" ]; then
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echo "Quiet mode enabled. To see technical output, do 'cat /tmp/debug.log' from Recovery Shell!" > /dev/tty0
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# export user related content from cbfs
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if [ "$CONFIG_COREBOOT" = "y" ]; then
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/bin/cbfs-init
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fi
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# Board config had CONFIG_DEBUG_OUTPUT=y defined.
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# Note that boards's coreboot config kernel command line "debug" option only will have all kernel messages output on console prior of this point
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# Override CONFIG_USE_BLOB_JAIL if needed and persist via user config
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if lspci -n | grep -E -q "8086:(2723|4df0)"; then
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if ! cat /etc/config.user 2>/dev/null | grep -q "USE_BLOB_JAIL"; then
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echo "CONFIG_USE_BLOB_JAIL=y" >>/etc/config.user
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fi
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fi
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# Override CONFIG_TPM and CONFIG_TPM2_TOOLS from /etc/config with runtime value
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# determined above.
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#
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# Values in user config have higher priority during combining thus effectively
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# changing the value for the rest of the scripts which source /tmp/config.
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#Only set CONFIG_TPM and CONFIG_TPM2_TOOLS if they are not already set in /etc/config.user
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if ! grep -q 'CONFIG_TPM=' /etc/config.user 2>/dev/null; then
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echo "export CONFIG_TPM=\"$CONFIG_TPM\"" >>/etc/config.user
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fi
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if ! grep -q 'CONFIG_TPM2_TOOLS=' /etc/config.user 2>/dev/null; then
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echo "export CONFIG_TPM2_TOOLS=\"$CONFIG_TPM2_TOOLS\"" >>/etc/config.user
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fi
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# CONFIG_BASIC was previously CONFIG_PUREBOOT_BASIC in the PureBoot distribution.
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# Substitute it in config.user if present for backward compatibility.
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sed -i -e 's/^export CONFIG_PUREBOOT_BASIC=/export CONFIG_BASIC=/g' /etc/config.user
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# Combine user configuration overrides from CBFS's /etc/config.user
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combine_configs
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# Load the user configuration parameters from combined config
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. /tmp/config
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# Enable maximum debug info from here if config.user extracted and combined from CBFS had CONFIG_DEBUG_OUTPUT=y
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if [ "$CONFIG_DEBUG_OUTPUT" = "y" ]; then
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#Maximize printk messages to output all to console (8=debug)
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#DEBUG and TRACE calls will output to /dev/kmsg, outputting both on dmesg and on console
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dmesg -n 8 || true
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DEBUG "Debug output enabled from board CONFIG_DEBUG_OUTPUT=y option (/etc/config)"
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else
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# Board config did't have CONFIG_DEBUG_OUTPUT=y defined
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#Output all kernel messages to console (8=debug)
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#DEBUG and TRACE calls will be in dmesg and on console
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# config.user extracted and combined from CBFS had CONFIG_DEBUG_OUTPUT=y
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# Output only print messages with a priority of 4 (warnings) or lower (errors and critical) kernel messages to console
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# This way, "debug" kernel command line option will have all kernel messages output on console prior of this point
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# This is useful to debug boot issues but permits qemu board to boot without flooding console with kernel messages by disabling CONFIG_DEBUG_OUTPUT=y in qemu board config
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dmesg -n 4 || true
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DEBUG "Debug output enabled from /etc/config.user's CONFIG_DEBUG_OUTPUT=y after combine_configs (Config menu enabled Debug)"
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dmesg -n 8
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DEBUG "Full debug output enabled from this point. For earlier debug output, enable CONFIG_DEBUG_OUTPUT=y in your board configuration at build time."
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TRACE_FUNC
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fi
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# report if we are in quiet mode, tell user measurements logs available under /tmp/debug.log
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if [ "$CONFIG_QUIET_MODE" = "y" ]; then
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# check origin of quiet mode setting =y: if it is under /etc/config.user then early cbfs-init outputs are not suppressible
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# if it is under /etc/config then early cbfs-init outputs are suppressible
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if ! grep -q 'CONFIG_QUIET_MODE="y"' /etc/config.user 2>/dev/null; then
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echo "Quiet mode enabled at build time: see /tmp/debug.log for boot measurements related traces" >/dev/tty0
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else
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echo "Quiet mode enabled at runtime by user configuration: see /tmp/debug.log for additional boot measurements traces past this point" >/dev/tty0
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echo "To suppress earlier boot measurements traces, enable CONFIG_QUIET_MODE=y in your board configuration at build time." >/dev/tty0
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" >/dev/tty0
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fi
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fi
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TRACE_FUNC
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@ -91,15 +128,14 @@ if [ ! -d /proc/sys ]; then
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warn "Please open an issue"
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fi
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if [ ! -e /proc/sys/vm/panic_on_oom ]; then
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warn "BUG!!! Requirements to setup Panic when under Out Of Memory situation through PROC_SYSCTL are missing (panic_on_oom was not enabled)"
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if [ ! -e /proc/sys/vm/panic_on_oom ]; then
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warn "BUG!!! Requirements to setup Panic when under Out Of Memory situation through PROC_SYSCTL are missing (panic_on_oom was not enabled)"
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warn "Please open an issue"
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else
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DEBUG "Applying panic_on_oom setting to sysctl"
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echo 1 > /proc/sys/vm/panic_on_oom
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echo 1 >/proc/sys/vm/panic_on_oom
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fi
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# set CONFIG_TPM dynamically before init
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if [ ! -e /dev/tpm0 ]; then
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CONFIG_TPM='n'
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@ -122,9 +158,6 @@ if [ "$CONFIG_TPM" = "y" ]; then
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tpmr startsession
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fi
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if [ "$CONFIG_COREBOOT" = "y" ]; then
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[ -x /bin/bash ] && /bin/cbfs-init
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fi
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if [ "$CONFIG_LINUXBOOT" = "y" ]; then
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/bin/uefi-init
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fi
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@ -134,56 +167,14 @@ fi
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export GPG_TTY=/dev/console
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# Initialize gpnupg with distro/user keys and setup the keyrings
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[ -x /bin/bash ] && /bin/key-init
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# Override CONFIG_USE_BLOB_JAIL if needed and persist via user config
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if lspci -n | grep -E -q "8086:(2723|4df0)"; then
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if ! cat /etc/config.user 2>/dev/null | grep -q "USE_BLOB_JAIL"; then
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echo "CONFIG_USE_BLOB_JAIL=y" >> /etc/config.user
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fi
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fi
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# Override CONFIG_TPM and CONFIG_TPM2_TOOLS from /etc/config with runtime value
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# determined above.
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#
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# Values in user config have higher priority during combining thus effectively
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# changing the value for the rest of the scripts which source /tmp/config.
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#Only set CONFIG_TPM and CONFIG_TPM2_TOOLS if they are not already set in /etc/config.user
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if ! grep -q 'CONFIG_TPM=' /etc/config.user 2>/dev/null; then
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echo "export CONFIG_TPM=\"$CONFIG_TPM\"" >> /etc/config.user
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fi
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if ! grep -q 'CONFIG_TPM2_TOOLS=' /etc/config.user 2> /dev/null; then
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echo "export CONFIG_TPM2_TOOLS=\"$CONFIG_TPM2_TOOLS\"" >> /etc/config.user
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fi
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# CONFIG_BASIC was previously CONFIG_PUREBOOT_BASIC in the PureBoot distribution.
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# Substitute it in config.user if present for backward compatibility.
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sed -i -e 's/^export CONFIG_PUREBOOT_BASIC=/export CONFIG_BASIC=/g' /etc/config.user
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combine_configs
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. /tmp/config
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# Enable maximum debug info from here if config.user extracted and combined from CBFS had CONFIG_DEBUG_OUTPUT=y
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if [ "$CONFIG_DEBUG_OUTPUT" = "y" ]; then
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#Output all kernel messages to console (8=debug)
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#DEBUG and TRACE calls will be in dmesg and on console
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if ! grep -q 'CONFIG_DEBUG_OUTPUT="y"' /etc/config;then
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# Board config did't have CONFIG_DEBUG_OUTPUT=y defined
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# config.user extracted and combined from CBFS had CONFIG_DEBUG_OUTPUT=y
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dmesg -n 8
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DEBUG "Debug output enabled from /etc/config.user's CONFIG_DEBUG_OUTPUT=y after combine_configs (Config menu enabled Debug)"
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TRACE_FUNC
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fi
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fi
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/bin/key-init
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# Setup recovery serial shell
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if [ ! -z "$CONFIG_BOOT_RECOVERY_SERIAL" ]; then
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stty -F "$CONFIG_BOOT_RECOVERY_SERIAL" 115200
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pause_recovery 'Serial console recovery shell' \
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< "$CONFIG_BOOT_RECOVERY_SERIAL" \
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> "$CONFIG_BOOT_RECOVERY_SERIAL" 2>&1 &
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<"$CONFIG_BOOT_RECOVERY_SERIAL" \
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>"$CONFIG_BOOT_RECOVERY_SERIAL" 2>&1 &
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fi
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# load USB modules for boards using a USB keyboard
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@ -207,14 +198,14 @@ if [ "$boot_option" = "r" ]; then
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exit
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elif [ "$boot_option" = "o" ]; then
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# Launch OEM Factory Reset mode
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echo -e "***** Entering OEM Factory Reset mode\n" > /dev/tty0
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echo -e "***** Entering OEM Factory Reset mode\n" >/dev/tty0
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oem-factory-reset --mode oem
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# just in case...
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exit
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fi
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if [ "$CONFIG_BASIC" = "y" ]; then
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echo -e "***** BASIC mode: tamper detection disabled\n" > /dev/tty0
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echo -e "***** BASIC mode: tamper detection disabled\n" >/dev/tty0
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fi
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# export firmware version
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@ -223,11 +214,11 @@ export FW_VER=$(fw_version)
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# Add our boot devices into the /etc/fstab, if they are defined
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# in the configuration file.
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if [ ! -z "$CONFIG_BOOT_DEV" ]; then
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echo >> /etc/fstab "$CONFIG_BOOT_DEV /boot auto defaults,ro 0 0"
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echo >>/etc/fstab "$CONFIG_BOOT_DEV /boot auto defaults,ro 0 0"
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fi
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# Set the console font if needed
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[ -x /bin/bash ] && setconsolefont.sh
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setconsolefont.sh
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if [ "$CONFIG_BASIC" = "y" ]; then
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CONFIG_BOOTSCRIPT=/bin/gui-init-basic
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@ -257,7 +248,7 @@ else
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setsid agetty -aroot -l"$CONFIG_BOOTSCRIPT" "$console" linux &
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done
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fi
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#Setup a control tty so that all terminals outputs correct tty when tty is called
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exec cttyhack "$CONFIG_BOOTSCRIPT"
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else
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