wireguard: selftests: remove ancient kernel compatibility code

Quite a bit of the test suite was designed to work with ancient kernels.
Thankfully we no longer have to deal with this. This commit updates
things that we can finally update and removes things that we can finally
remove, to avoid the build-up of the last several years as a result of
having to support ancient kernels. We can finally rely on suppress_
prefixlength being available. On the build side of things, the no-PIE
hack is no longer required, and we can bump some of the tools, repair
our m68k and i686-kvm support, and get better coverage of the static
branches used in the crypto lib and in udp_tunnel.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/wireguard/netns.sh

@@ -37,7 +37,7 @@ n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; }
 ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; }
 ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
 ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
-sleep() { read -t "$1" -N 0 || true; }
+sleep() { read -t "$1" -N 1 || true; }
 waitiperf() { pretty "${1//*-}" "wait for iperf:5201"; while [[ $(ss -N "$1" -tlp 'sport = 5201') != *iperf3* ]]; do sleep 0.1; done; }
 waitncatudp() { pretty "${1//*-}" "wait for udp:1111"; while [[ $(ss -N "$1" -ulp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
 waitncattcp() { pretty "${1//*-}" "wait for tcp:1111"; while [[ $(ss -N "$1" -tlp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
@@ -294,12 +294,9 @@ ip1 -6 rule add table main suppress_prefixlength 0
 ip1 -4 route add default dev wg0 table 51820
 ip1 -4 rule add not fwmark 51820 table 51820
 ip1 -4 rule add table main suppress_prefixlength 0
-# suppress_prefixlength only got added in 3.12, and we want to support 3.10+.
-if [[ $(ip1 -4 rule show all) == *suppress_prefixlength* ]]; then
-	# Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
-	n1 ping -W 1 -c 100 -f 192.168.99.7
-	n1 ping -W 1 -c 100 -f abab::1111
-fi
+# Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
+n1 ping -W 1 -c 100 -f 192.168.99.7
+n1 ping -W 1 -c 100 -f abab::1111
 
 n0 iptables -t nat -F
 ip0 link del vethrc

tools/testing/selftests/wireguard/qemu/arch/m68k.config

 CONFIG_MMU=y
+CONFIG_M68KCLASSIC=y
 CONFIG_M68040=y
 CONFIG_MAC=y
 CONFIG_SERIAL_PMACZILOG=y
 CONFIG_SERIAL_PMACZILOG_TTYS=y
 CONFIG_SERIAL_PMACZILOG_CONSOLE=y
-CONFIG_CMDLINE_BOOL=y
 CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1"
 CONFIG_FRAME_WARN=1024

tools/testing/selftests/wireguard/qemu/init.c

@@ -21,6 +21,7 @@
 #include <sys/reboot.h>
 #include <sys/utsname.h>
 #include <sys/sendfile.h>
+#include <sys/sysmacros.h>
 #include <linux/random.h>
 #include <linux/version.h>
 

tools/testing/selftests/wireguard/qemu/kernel.config

@@ -39,6 +39,7 @@ CONFIG_PRINTK=y
 CONFIG_KALLSYMS=y
 CONFIG_BUG=y
 CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
+CONFIG_JUMP_LABEL=y
 CONFIG_EMBEDDED=n
 CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
@@ -55,6 +56,7 @@ CONFIG_NO_HZ_IDLE=y
 CONFIG_NO_HZ_FULL=n
 CONFIG_HZ_PERIODIC=n
 CONFIG_HIGH_RES_TIMERS=y
+CONFIG_COMPAT_32BIT_TIME=y
 CONFIG_ARCH_RANDOM=y
 CONFIG_FILE_LOCKING=y
 CONFIG_POSIX_TIMERS=y