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|
#!/bin/bash
if [[ -n "${verbose}" ]]; then
echo 'Current working directory:'
echo " - according to builtin: [$(pwd)]"
echo " - according to /bin/pwd: [$(/bin/pwd)]"
echo
echo 'Shell environment:'
env
echo
echo -n "net_test.sh (pid $$, parent ${PPID}, tty $(tty)) running [$0] with args:"
for arg in "$@"; do
echo -n " [${arg}]"
done
echo
echo
fi
if [[ "$(tty)" == 'not a tty' ]]; then
echo 'not a tty? perhaps not quite real kernel default /dev/console - trying to fix.'
if [[ -c /dev/console ]]; then
[[ "$(readlink /proc/$$/fd/0)" != '/dev/console' ]] || exec < /dev/console
[[ "$(readlink /proc/$$/fd/1)" != '/dev/console' ]] || exec > /dev/console
[[ "$(readlink /proc/$$/fd/2)" != '/dev/console' ]] || exec 2> /dev/console
fi
fi
if [[ "$(tty)" == '/dev/console' ]]; then
ARCH="$(uname -m)"
# Underscore is illegal in hostname, replace with hyphen
ARCH="${ARCH//_/-}"
# setsid + /dev/tty{,AMA,S}0 allows bash's job control to work, ie. Ctrl+C/Z
if [[ -e '/proc/exitcode' ]]; then
# exists only in UML
CON='/dev/tty0'
hostname "uml-${ARCH}"
elif [[ -c '/dev/ttyAMA0' ]]; then
# Qemu for arm (note: /dev/ttyS0 also exists for exitcode)
CON='/dev/ttyAMA0'
hostname "qemu-${ARCH}"
elif [[ -c '/dev/ttyS0' ]]; then
# Qemu for x86 (note: /dev/ttyS1 also exists for exitcode)
CON='/dev/ttyS0'
hostname "qemu-${ARCH}"
else
# Can't figure it out, job control won't work, tough luck
echo 'Unable to figure out proper console - job control will not work.' >&2
CON=''
hostname "local-${ARCH}"
fi
unset ARCH
echo -n "$(hostname): Currently tty[/dev/console], but it should be [${CON}]..."
if [[ -n "${CON}" ]]; then
# Redirect std{in,out,err} to the console equivalent tty
# which actually supports all standard tty ioctls
exec <"${CON}" >&"${CON}"
# Bash wants to be session leader, hence need for setsid
echo " re-executing..."
exec /usr/bin/setsid "$0" "$@"
# If the above exec fails, we just fall through...
# (this implies failure to *find* setsid, not error return from bash,
# in practice due to image construction this cannot happen)
else
echo
fi
# In case we fall through, clean up
unset CON
fi
if [[ -n "${verbose}" ]]; then
echo 'TTY settings:'
stty
echo
echo 'TTY settings (verbose):'
stty -a
echo
echo 'Restoring TTY sanity...'
fi
stty sane
stty 115200
[[ -z "${console_cols}" ]] || stty columns "${console_cols}"
[[ -z "${console_rows}" ]] || stty rows "${console_rows}"
if [[ -n "${verbose}" ]]; then
echo
echo 'TTY settings:'
stty
echo
echo 'TTY settings (verbose):'
stty -a
echo
fi
# By the time we get here we should have a sane console:
# - 115200 baud rate
# - appropriate (and known) width and height (note: this assumes
# that the terminal doesn't get further resized)
# - it is no longer /dev/console, so job control should function
# (this means working ctrl+c [abort] and ctrl+z [suspend])
# This defaults to 60 which is needlessly long during boot
# (we will reset it back to the default later)
echo 0 > /proc/sys/kernel/random/urandom_min_reseed_secs
if [[ -n "${entropy}" ]]; then
echo "adding entropy from hex string [${entropy}]" >&2
# In kernel/include/uapi/linux/random.h RNDADDENTROPY is defined as
# _IOW('R', 0x03, int[2]) =(R is 0x52)= 0x40085203 = 1074287107
/usr/bin/python3 3>/dev/random <<EOF
import base64, fcntl, struct
rnd = base64.b64decode('${entropy}')
fcntl.ioctl(3, 0x40085203, struct.pack('ii', len(rnd) * 8, len(rnd)) + rnd)
EOF
fi
# Make sure the urandom pool has a chance to initialize before we reset
# the reseed timer back to 60 seconds. One timer tick should be enough.
sleep 1.1
# By this point either 'random: crng init done' (newer kernels)
# or 'random: nonblocking pool is initialized' (older kernels)
# should have been printed out to dmesg/console.
# Reset it back to boot time default
echo 60 > /proc/sys/kernel/random/urandom_min_reseed_secs
# Make sure /sys is mounted
[[ -d /sys/fs ]] || mount -t sysfs sysfs -o nosuid,nodev,noexec /sys
if ! [[ "$(uname -r)" =~ ^([0-3]|4[.][0-8])[.] ]]; then
# Mount the bpf filesystem on Linux version 4.9+
mount -t bpf bpf -o nosuid,nodev,noexec /sys/fs/bpf
fi
if ! [[ "$(uname -r)" =~ ^([0-3]|4[.][0-9]|4[.]1[0-3])[.] ]]; then
# Mount the Cgroup v2 filesystem on Linux version 4.14+
mount -t cgroup2 cgroup2 -o nosuid,nodev,noexec /sys/fs/cgroup
fi
# In case IPv6 is compiled as a module.
[ -f /proc/net/if_inet6 ] || insmod $DIR/kernel/net-next/net/ipv6/ipv6.ko
# Minimal network setup.
ip link set lo up
ip link set lo mtu 16436
if [[ -d /sys/class/net/eth0 ]]; then
ip link set eth0 up
fi
# Allow people to run ping.
echo '0 2147483647' > /proc/sys/net/ipv4/ping_group_range
# Allow unprivileged use of eBPF (matches Android OS)
if [[ "$(< /proc/sys/kernel/unprivileged_bpf_disabled)" != '0' ]]; then
echo 0 > /proc/sys/kernel/unprivileged_bpf_disabled
fi
# Read environment variables passed to the kernel to determine if script is
# running on builder and to find which test to run.
if [ "$net_test_mode" != "builder" ]; then
# Fall out to a shell once the test completes or if there's an error.
trap "exec /bin/bash" ERR EXIT
fi
echo -e "Running $net_test $net_test_args\n"
$net_test $net_test_args
rv="$?"
# Write exit code of net_test to a file so that the builder can use it
# to signal failure if any tests fail.
echo "${rv}" > "${exitcode}"
# Additionally on UML make it the exit code of UML kernel binary itself.
if [[ -e '/proc/exitcode' ]]; then
echo "${rv}" > /proc/exitcode
fi
|
