Merge tag 'net-next-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Large effort by Eric to lower rtnl_lock pressure and remove locks:

      - Make commonly used parts of rtnetlink (address, route dumps
        etc) lockless, protected by RCU instead of rtnl_lock.

      - Add a netns exit callback which already holds rtnl_lock,
        allowing netns exit to take rtnl_lock once in the core instead
        of once for each driver / callback.

      - Remove locks / serialization in the socket diag interface.

      - Remove 6 calls to synchronize_rcu() while holding rtnl_lock.

      - Remove the dev_base_lock, depend on RCU where necessary.

   - Support busy polling on a per-epoll context basis. Poll length and
     budget parameters can be set independently of system defaults.

   - Introduce struct net_hotdata, to make sure read-mostly global
     config variables fit in as few cache lines as possible.

   - Add optional per-nexthop statistics to ease monitoring / debug of
     ECMP imbalance problems.

   - Support TCP_NOTSENT_LOWAT in MPTCP.

   - Ensure that IPv6 temporary addresses' preferred lifetimes are long
     enough, compared to other configured lifetimes, and at least 2 sec.

   - Support forwarding of ICMP Error messages in IPSec, per RFC 4301.

   - Add support for the independent control state machine for bonding
     per IEEE 802.1AX-2008 5.4.15 in addition to the existing coupled
     control state machine.

   - Add "network ID" to MCTP socket APIs to support hosts with multiple
     disjoint MCTP networks.

   - Re-use the mono_delivery_time skbuff bit for packets which user
     space wants to be sent at a specified time. Maintain the timing
     information while traversing veth links, bridge etc.

   - Take advantage of MSG_SPLICE_PAGES for RxRPC DATA and ACK packets.

   - Simplify many places iterating over netdevs by using an xarray
     instead of a hash table walk (hash table remains in place, for use
     on fastpaths).

   - Speed up scanning for expired routes by keeping a dedicated list.

   - Speed up "generic" XDP by trying harder to avoid large allocations.

   - Support attaching arbitrary metadata to netconsole messages.

  Things we sprinkled into general kernel code:

   - Enforce VM_IOREMAP flag and range in ioremap_page_range and
     introduce VM_SPARSE kind and vm_area_[un]map_pages (used by
     bpf_arena).

   - Rework selftest harness to enable the use of the full range of ksft
     exit code (pass, fail, skip, xfail, xpass).

  Netfilter:

   - Allow userspace to define a table that is exclusively owned by a
     daemon (via netlink socket aliveness) without auto-removing this
     table when the userspace program exits. Such table gets marked as
     orphaned and a restarting management daemon can re-attach/regain
     ownership.

   - Speed up element insertions to nftables' concatenated-ranges set
     type. Compact a few related data structures.

  BPF:

   - Add BPF token support for delegating a subset of BPF subsystem
     functionality from privileged system-wide daemons such as systemd
     through special mount options for userns-bound BPF fs to a trusted
     & unprivileged application.

   - Introduce bpf_arena which is sparse shared memory region between
     BPF program and user space where structures inside the arena can
     have pointers to other areas of the arena, and pointers work
     seamlessly for both user-space programs and BPF programs.

   - Introduce may_goto instruction that is a contract between the
     verifier and the program. The verifier allows the program to loop
     assuming it's behaving well, but reserves the right to terminate
     it.

   - Extend the BPF verifier to enable static subprog calls in spin lock
     critical sections.

   - Support registration of struct_ops types from modules which helps
     projects like fuse-bpf that seeks to implement a new struct_ops
     type.

   - Add support for retrieval of cookies for perf/kprobe multi links.

   - Support arbitrary TCP SYN cookie generation / validation in the TC
     layer with BPF to allow creating SYN flood handling in BPF
     firewalls.

   - Add code generation to inline the bpf_kptr_xchg() helper which
     improves performance when stashing/popping the allocated BPF
     objects.

  Wireless:

   - Add SPP (signaling and payload protected) AMSDU support.

   - Support wider bandwidth OFDMA, as required for EHT operation.

  Driver API:

   - Major overhaul of the Energy Efficient Ethernet internals to
     support new link modes (2.5GE, 5GE), share more code between
     drivers (especially those using phylib), and encourage more
     uniform behavior. Convert and clean up drivers.

   - Define an API for querying per netdev queue statistics from
     drivers.

   - IPSec: account in global stats for fully offloaded sessions.

   - Create a concept of Ethernet PHY Packages at the Device Tree level,
     to allow parameterizing the existing PHY package code.

   - Enable Rx hashing (RSS) on GTP protocol fields.

  Misc:

   - Improvements and refactoring all over networking selftests.

   - Create uniform module aliases for TC classifiers, actions, and
     packet schedulers to simplify creating modprobe policies.

   - Address all missing MODULE_DESCRIPTION() warnings in networking.

   - Extend the Netlink descriptions in YAML to cover message
     encapsulation or "Netlink polymorphism", where interpretation of
     nested attributes depends on link type, classifier type or some
     other "class type".

  Drivers:

   - Ethernet high-speed NICs:
      - Add a new driver for Marvell's Octeon PCI Endpoint NIC VF.
      - Intel (100G, ice, idpf):
         - support E825-C devices
      - nVidia/Mellanox:
         - support devices with one port and multiple PCIe links
      - Broadcom (bnxt):
         - support n-tuple filters
         - support configuring the RSS key
      - Wangxun (ngbe/txgbe):
         - implement irq_domain for TXGBE's sub-interrupts
      - Pensando/AMD:
         - support XDP
         - optimize queue submission and wakeup handling (+17% bps)
         - optimize struct layout, saving 28% of memory on queues

   - Ethernet NICs embedded and virtual:
      - Google cloud vNIC:
         - refactor driver to perform memory allocations for new queue
           config before stopping and freeing the old queue memory
      - Synopsys (stmmac):
         - obey queueMaxSDU and implement counters required by 802.1Qbv
      - Renesas (ravb):
         - support packet checksum offload
         - suspend to RAM and runtime PM support

   - Ethernet switches:
      - nVidia/Mellanox:
         - support for nexthop group statistics
      - Microchip:
         - ksz8: implement PHY loopback
         - add support for KSZ8567, a 7-port 10/100Mbps switch

   - PTP:
      - New driver for RENESAS FemtoClock3 Wireless clock generator.
      - Support OCP PTP cards designed and built by Adva.

   - CAN:
      - Support recvmsg() flags for own, local and remote traffic on CAN
        BCM sockets.
      - Support for esd GmbH PCIe/402 CAN device family.
      - m_can:
         - Rx/Tx submission coalescing
         - wake on frame Rx

   - WiFi:
      - Intel (iwlwifi):
         - enable signaling and payload protected A-MSDUs
         - support wider-bandwidth OFDMA
         - support for new devices
         - bump FW API to 89 for AX devices; 90 for BZ/SC devices
      - MediaTek (mt76):
         - mt7915: newer ADIE version support
         - mt7925: radio temperature sensor support
      - Qualcomm (ath11k):
         - support 6 GHz station power modes: Low Power Indoor (LPI),
           Standard Power) SP and Very Low Power (VLP)
         - QCA6390 & WCN6855: support 2 concurrent station interfaces
         - QCA2066 support
      - Qualcomm (ath12k):
         - refactoring in preparation for Multi-Link Operation (MLO)
           support
         - 1024 Block Ack window size support
         - firmware-2.bin support
         - support having multiple identical PCI devices (firmware needs
           to have ATH12K_FW_FEATURE_MULTI_QRTR_ID)
         - QCN9274: support split-PHY devices
         - WCN7850: enable Power Save Mode in station mode
         - WCN7850: P2P support
      - RealTek:
         - rtw88: support for more rtw8811cu and rtw8821cu devices
         - rtw89: support SCAN_RANDOM_SN and SET_SCAN_DWELL
         - rtlwifi: speed up USB firmware initialization
         - rtwl8xxxu:
             - RTL8188F: concurrent interface support
             - Channel Switch Announcement (CSA) support in AP mode
      - Broadcom (brcmfmac):
         - per-vendor feature support
         - per-vendor SAE password setup
         - DMI nvram filename quirk for ACEPC W5 Pro"

* tag 'net-next-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2255 commits)
  nexthop: Fix splat with CONFIG_DEBUG_PREEMPT=y
  nexthop: Fix out-of-bounds access during attribute validation
  nexthop: Only parse NHA_OP_FLAGS for dump messages that require it
  nexthop: Only parse NHA_OP_FLAGS for get messages that require it
  bpf: move sleepable flag from bpf_prog_aux to bpf_prog
  bpf: hardcode BPF_PROG_PACK_SIZE to 2MB * num_possible_nodes()
  selftests/bpf: Add kprobe multi triggering benchmarks
  ptp: Move from simple ida to xarray
  vxlan: Remove generic .ndo_get_stats64
  vxlan: Do not alloc tstats manually
  devlink: Add comments to use netlink gen tool
  nfp: flower: handle acti_netdevs allocation failure
  net/packet: Add getsockopt support for PACKET_COPY_THRESH
  net/netlink: Add getsockopt support for NETLINK_LISTEN_ALL_NSID
  selftests/bpf: Add bpf_arena_htab test.
  selftests/bpf: Add bpf_arena_list test.
  selftests/bpf: Add unit tests for bpf_arena_alloc/free_pages
  bpf: Add helper macro bpf_addr_space_cast()
  libbpf: Recognize __arena global variables.
  bpftool: Recognize arena map type
  ...

1 files changed, 131 insertions, 117 deletions

diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index 7898d62fce0b..4c4248554826 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -1,6 +1,11 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
+# Double quotes to prevent globbing and word splitting is recommended in new
+# code but we accept it, especially because there were too many before having
+# address all other issues detected by shellcheck.
+#shellcheck disable=SC2086
+
 . "$(dirname "${0}")/mptcp_lib.sh"
 
 time_start=$(date +%s)
@@ -13,7 +18,6 @@ sout=""
 cin_disconnect=""
 cin=""
 cout=""
-ksft_skip=4
 capture=false
 timeout_poll=30
 timeout_test=$((timeout_poll * 2 + 1))
@@ -29,6 +33,7 @@ do_tcp=0
 checksum=false
 filesize=0
 connect_per_transfer=1
+port=$((10000 - 1))
 
 if [ $tc_loss -eq 100 ];then
 	tc_loss=1%
@@ -60,14 +65,14 @@ while getopts "$optstring" option;do
 	case "$option" in
 	"h")
 		usage $0
-		exit 0
+		exit ${KSFT_PASS}
 		;;
 	"d")
 		if [ $OPTARG -ge 0 ];then
 			tc_delay="$OPTARG"
 		else
 			echo "-d requires numeric argument, got \"$OPTARG\"" 1>&2
-			exit 1
+			exit ${KSFT_FAIL}
 		fi
 		;;
 	"e")
@@ -91,7 +96,7 @@ while getopts "$optstring" option;do
 			sndbuf="$OPTARG"
 		else
 			echo "-S requires numeric argument, got \"$OPTARG\"" 1>&2
-			exit 1
+			exit ${KSFT_FAIL}
 		fi
 		;;
 	"R")
@@ -99,7 +104,7 @@ while getopts "$optstring" option;do
 			rcvbuf="$OPTARG"
 		else
 			echo "-R requires numeric argument, got \"$OPTARG\"" 1>&2
-			exit 1
+			exit ${KSFT_FAIL}
 		fi
 		;;
 	"m")
@@ -116,21 +121,20 @@ while getopts "$optstring" option;do
 		;;
 	"?")
 		usage $0
-		exit 1
+		exit ${KSFT_FAIL}
 		;;
 	esac
 done
 
-sec=$(date +%s)
-rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
-ns1="ns1-$rndh"
-ns2="ns2-$rndh"
-ns3="ns3-$rndh"
-ns4="ns4-$rndh"
+ns1=""
+ns2=""
+ns3=""
+ns4=""
 
-TEST_COUNT=0
 TEST_GROUP=""
 
+# This function is used in the cleanup trap
+#shellcheck disable=SC2317
 cleanup()
 {
 	rm -f "$cin_disconnect" "$cout_disconnect"
@@ -138,21 +142,12 @@ cleanup()
 	rm -f "$sin" "$sout"
 	rm -f "$capout"
 
-	local netns
-	for netns in "$ns1" "$ns2" "$ns3" "$ns4";do
-		ip netns del $netns
-		rm -f /tmp/$netns.{nstat,out}
-	done
+	mptcp_lib_ns_exit "${ns1}" "${ns2}" "${ns3}" "${ns4}"
 }
 
 mptcp_lib_check_mptcp
 mptcp_lib_check_kallsyms
-
-ip -Version > /dev/null 2>&1
-if [ $? -ne 0 ];then
-	echo "SKIP: Could not run test without ip tool"
-	exit $ksft_skip
-fi
+mptcp_lib_check_tools ip
 
 sin=$(mktemp)
 sout=$(mktemp)
@@ -163,10 +158,7 @@ cin_disconnect="$cin".disconnect
 cout_disconnect="$cout".disconnect
 trap cleanup EXIT
 
-for i in "$ns1" "$ns2" "$ns3" "$ns4";do
-	ip netns add $i || exit $ksft_skip
-	ip -net $i link set lo up
-done
+mptcp_lib_ns_init ns1 ns2 ns3 ns4
 
 #  "$ns1"              ns2                    ns3                     ns4
 # ns1eth2    ns2eth1   ns2eth3      ns3eth2   ns3eth4       ns4eth3
@@ -225,8 +217,9 @@ set_ethtool_flags() {
 	local dev="$2"
 	local flags="$3"
 
-	ip netns exec $ns ethtool -K $dev $flags 2>/dev/null
-	[ $? -eq 0 ] && echo "INFO: set $ns dev $dev: ethtool -K $flags"
+	if ip netns exec $ns ethtool -K $dev $flags 2>/dev/null; then
+		mptcp_lib_pr_info "set $ns dev $dev: ethtool -K $flags"
+	fi
 }
 
 set_random_ethtool_flags() {
@@ -254,16 +247,23 @@ else
 	set_ethtool_flags "$ns4" ns4eth3 "$ethtool_args"
 fi
 
+print_larger_title() {
+	# here we don't have the time, a bit longer for the alignment
+	MPTCP_LIB_TEST_FORMAT="%02u %-69s" \
+		mptcp_lib_print_title "${@}"
+}
+
 check_mptcp_disabled()
 {
-	local disabled_ns="ns_disabled-$rndh"
-	ip netns add ${disabled_ns} || exit $ksft_skip
+	local disabled_ns
+	mptcp_lib_ns_init disabled_ns
 
+	print_larger_title "New MPTCP socket can be blocked via sysctl"
 	# net.mptcp.enabled should be enabled by default
 	if [ "$(ip netns exec ${disabled_ns} sysctl net.mptcp.enabled | awk '{ print $3 }')" -ne 1 ]; then
-		echo -e "net.mptcp.enabled sysctl is not 1 by default\t\t[ FAIL ]"
+		mptcp_lib_pr_fail "net.mptcp.enabled sysctl is not 1 by default"
 		mptcp_lib_result_fail "net.mptcp.enabled sysctl is not 1 by default"
-		ret=1
+		ret=${KSFT_FAIL}
 		return 1
 	fi
 	ip netns exec ${disabled_ns} sysctl -q net.mptcp.enabled=0
@@ -271,16 +271,16 @@ check_mptcp_disabled()
 	local err=0
 	LC_ALL=C ip netns exec ${disabled_ns} ./mptcp_connect -p 10000 -s MPTCP 127.0.0.1 < "$cin" 2>&1 | \
 		grep -q "^socket: Protocol not available$" && err=1
-	ip netns delete ${disabled_ns}
+	mptcp_lib_ns_exit "${disabled_ns}"
 
 	if [ ${err} -eq 0 ]; then
-		echo -e "New MPTCP socket cannot be blocked via sysctl\t\t[ FAIL ]"
+		mptcp_lib_pr_fail "New MPTCP socket cannot be blocked via sysctl"
 		mptcp_lib_result_fail "New MPTCP socket cannot be blocked via sysctl"
-		ret=1
+		ret=${KSFT_FAIL}
 		return 1
 	fi
 
-	echo -e "New MPTCP socket can be blocked via sysctl\t\t[ OK ]"
+	mptcp_lib_pr_ok
 	mptcp_lib_result_pass "New MPTCP socket can be blocked via sysctl"
 	return 0
 }
@@ -301,8 +301,8 @@ do_ping()
 	ip netns exec ${connector_ns} ping ${ping_args} $connect_addr >/dev/null || rc=1
 
 	if [ $rc -ne 0 ] ; then
-		echo "$listener_ns -> $connect_addr connectivity [ FAIL ]" 1>&2
-		ret=1
+		mptcp_lib_pr_fail "$listener_ns -> $connect_addr connectivity"
+		ret=${KSFT_FAIL}
 
 		return 1
 	fi
@@ -320,24 +320,22 @@ do_transfer()
 	local local_addr="$6"
 	local extra_args="$7"
 
-	local port
-	port=$((10000+$TEST_COUNT))
-	TEST_COUNT=$((TEST_COUNT+1))
+	port=$((port + 1))
 
 	if [ "$rcvbuf" -gt 0 ]; then
-		extra_args="$extra_args -R $rcvbuf"
+		extra_args+=" -R $rcvbuf"
 	fi
 
 	if [ "$sndbuf" -gt 0 ]; then
-		extra_args="$extra_args -S $sndbuf"
+		extra_args+=" -S $sndbuf"
 	fi
 
 	if [ -n "$testmode" ]; then
-		extra_args="$extra_args -m $testmode"
+		extra_args+=" -m $testmode"
 	fi
 
 	if [ -n "$extra_args" ] && $options_log; then
-		echo "INFO: extra options: $extra_args"
+		mptcp_lib_pr_info "extra options: $extra_args"
 	fi
 	options_log=false
 
@@ -349,10 +347,11 @@ do_transfer()
 	addr_port=$(printf "%s:%d" ${connect_addr} ${port})
 	local result_msg
 	result_msg="$(printf "%.3s %-5s -> %.3s (%-20s) %-5s" ${connector_ns} ${cl_proto} ${listener_ns} ${addr_port} ${srv_proto})"
-	printf "%s\t" "${result_msg}"
+	mptcp_lib_print_title "${result_msg}"
 
 	if $capture; then
 		local capuser
+		local rndh="${connector_ns:4}"
 		if [ -z $SUDO_USER ] ; then
 			capuser=""
 		else
@@ -378,12 +377,18 @@ do_transfer()
 			nstat -n
 	fi
 
-	local stat_synrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
-	local stat_ackrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
-	local stat_cookietx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
-	local stat_cookierx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
-	local stat_csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
-	local stat_csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
+	local stat_synrx_last_l
+	local stat_ackrx_last_l
+	local stat_cookietx_last
+	local stat_cookierx_last
+	local stat_csum_err_s
+	local stat_csum_err_c
+	stat_synrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
+	stat_ackrx_last_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
+	stat_cookietx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
+	stat_cookierx_last=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
+	stat_csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+	stat_csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
 
 	timeout ${timeout_test} \
 		ip netns exec ${listener_ns} \
@@ -427,7 +432,7 @@ do_transfer()
 	result_msg+=" # time=${duration}ms"
 	printf "(duration %05sms) " "${duration}"
 	if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
-		echo "[ FAIL ] client exit code $retc, server $rets" 1>&2
+		mptcp_lib_pr_fail "client exit code $retc, server $rets"
 		echo -e "\nnetns ${listener_ns} socket stat for ${port}:" 1>&2
 		ip netns exec ${listener_ns} ss -Menita 1>&2 -o "sport = :$port"
 		cat /tmp/${listener_ns}.out
@@ -446,11 +451,17 @@ do_transfer()
 	mptcp_lib_check_transfer $cin $sout "file received by server"
 	rets=$?
 
-	local stat_synrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
-	local stat_ackrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
-	local stat_cookietx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
-	local stat_cookierx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
-	local stat_ooo_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtTCPOFOQueue")
+	local extra=""
+	local stat_synrx_now_l
+	local stat_ackrx_now_l
+	local stat_cookietx_now
+	local stat_cookierx_now
+	local stat_ooo_now
+	stat_synrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableSYNRX")
+	stat_ackrx_now_l=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtMPCapableACKRX")
+	stat_cookietx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesSent")
+	stat_cookierx_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtSyncookiesRecv")
+	stat_ooo_now=$(mptcp_lib_get_counter "${listener_ns}" "TcpExtTCPOFOQueue")
 
 	expect_synrx=$((stat_synrx_last_l))
 	expect_ackrx=$((stat_ackrx_last_l))
@@ -459,75 +470,79 @@ do_transfer()
 	cookies=${cookies##*=}
 
 	if [ ${cl_proto} = "MPTCP" ] && [ ${srv_proto} = "MPTCP" ]; then
-		expect_synrx=$((stat_synrx_last_l+$connect_per_transfer))
-		expect_ackrx=$((stat_ackrx_last_l+$connect_per_transfer))
+		expect_synrx=$((stat_synrx_last_l+connect_per_transfer))
+		expect_ackrx=$((stat_ackrx_last_l+connect_per_transfer))
 	fi
 
 	if [ ${stat_synrx_now_l} -lt ${expect_synrx} ]; then
-		printf "[ FAIL ] lower MPC SYN rx (%d) than expected (%d)\n" \
-			"${stat_synrx_now_l}" "${expect_synrx}" 1>&2
+		mptcp_lib_pr_fail "lower MPC SYN rx (${stat_synrx_now_l})" \
+				  "than expected (${expect_synrx})"
 		retc=1
 	fi
-	if [ ${stat_ackrx_now_l} -lt ${expect_ackrx} -a ${stat_ooo_now} -eq 0 ]; then
+	if [ ${stat_ackrx_now_l} -lt ${expect_ackrx} ] && [ ${stat_ooo_now} -eq 0 ]; then
 		if [ ${stat_ooo_now} -eq 0 ]; then
-			printf "[ FAIL ] lower MPC ACK rx (%d) than expected (%d)\n" \
-				"${stat_ackrx_now_l}" "${expect_ackrx}" 1>&2
+			mptcp_lib_pr_fail "lower MPC ACK rx (${stat_ackrx_now_l})" \
+					  "than expected (${expect_ackrx})"
 			rets=1
 		else
-			printf "[ Note ] fallback due to TCP OoO"
+			extra+=" [ Note ] fallback due to TCP OoO"
 		fi
 	fi
 
 	if $checksum; then
-		local csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
-		local csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
+		local csum_err_s
+		local csum_err_c
+		csum_err_s=$(mptcp_lib_get_counter "${listener_ns}" "MPTcpExtDataCsumErr")
+		csum_err_c=$(mptcp_lib_get_counter "${connector_ns}" "MPTcpExtDataCsumErr")
 
 		local csum_err_s_nr=$((csum_err_s - stat_csum_err_s))
 		if [ $csum_err_s_nr -gt 0 ]; then
-			printf "[ FAIL ]\nserver got $csum_err_s_nr data checksum error[s]"
+			mptcp_lib_pr_fail "server got ${csum_err_s_nr} data checksum error[s]"
 			rets=1
 		fi
 
 		local csum_err_c_nr=$((csum_err_c - stat_csum_err_c))
 		if [ $csum_err_c_nr -gt 0 ]; then
-			printf "[ FAIL ]\nclient got $csum_err_c_nr data checksum error[s]"
+			mptcp_lib_pr_fail "client got ${csum_err_c_nr} data checksum error[s]"
 			retc=1
 		fi
 	fi
 
-	if [ $retc -eq 0 ] && [ $rets -eq 0 ]; then
-		printf "[ OK ]"
-		mptcp_lib_result_pass "${TEST_GROUP}: ${result_msg}"
-	else
-		mptcp_lib_result_fail "${TEST_GROUP}: ${result_msg}"
-	fi
-
 	if [ $cookies -eq 2 ];then
 		if [ $stat_cookietx_last -ge $stat_cookietx_now ] ;then
-			printf " WARN: CookieSent: did not advance"
+			extra+=" WARN: CookieSent: did not advance"
 		fi
 		if [ $stat_cookierx_last -ge $stat_cookierx_now ] ;then
-			printf " WARN: CookieRecv: did not advance"
+			extra+=" WARN: CookieRecv: did not advance"
 		fi
 	else
 		if [ $stat_cookietx_last -ne $stat_cookietx_now ] ;then
-			printf " WARN: CookieSent: changed"
+			extra+=" WARN: CookieSent: changed"
 		fi
 		if [ $stat_cookierx_last -ne $stat_cookierx_now ] ;then
-			printf " WARN: CookieRecv: changed"
+			extra+=" WARN: CookieRecv: changed"
 		fi
 	fi
 
 	if [ ${stat_synrx_now_l} -gt ${expect_synrx} ]; then
-		printf " WARN: SYNRX: expect %d, got %d (probably retransmissions)" \
-			"${expect_synrx}" "${stat_synrx_now_l}"
+		extra+=" WARN: SYNRX: expect ${expect_synrx},"
+		extra+=" got ${stat_synrx_now_l} (probably retransmissions)"
 	fi
 	if [ ${stat_ackrx_now_l} -gt ${expect_ackrx} ]; then
-		printf " WARN: ACKRX: expect %d, got %d (probably retransmissions)" \
-			"${expect_ackrx}" "${stat_ackrx_now_l}"
+		extra+=" WARN: ACKRX: expect ${expect_ackrx},"
+		extra+=" got ${stat_ackrx_now_l} (probably retransmissions)"
+	fi
+
+	if [ $retc -eq 0 ] && [ $rets -eq 0 ]; then
+		mptcp_lib_pr_ok "${extra:1}"
+		mptcp_lib_result_pass "${TEST_GROUP}: ${result_msg}"
+	else
+		if [ -n "${extra}" ]; then
+			mptcp_lib_print_warn "${extra:1}"
+		fi
+		mptcp_lib_result_fail "${TEST_GROUP}: ${result_msg}"
 	fi
 
-	echo
 	cat "$capout"
 	[ $retc -eq 0 ] && [ $rets -eq 0 ]
 }
@@ -653,12 +668,12 @@ run_test_transparent()
 	# following function has been exported (T). Not great but better than
 	# checking for a specific kernel version.
 	if ! mptcp_lib_kallsyms_has "T __ip_sock_set_tos$"; then
-		echo "INFO: ${msg} not supported by the kernel: SKIP"
+		mptcp_lib_pr_skip "${msg} not supported by the kernel"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
 	fi
 
-ip netns exec "$listener_ns" nft -f /dev/stdin <<"EOF"
+	if ! ip netns exec "$listener_ns" nft -f /dev/stdin <<"EOF"
 flush ruleset
 table inet mangle {
 	chain divert {
@@ -669,8 +684,8 @@ table inet mangle {
 	}
 }
 EOF
-	if [ $? -ne 0 ]; then
-		echo "SKIP: $msg, could not load nft ruleset"
+	then
+		mptcp_lib_pr_skip "$msg, could not load nft ruleset"
 		mptcp_lib_fail_if_expected_feature "nft rules"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
@@ -684,28 +699,26 @@ EOF
 		local_addr="0.0.0.0"
 	fi
 
-	ip -net "$listener_ns" $r6flag rule add fwmark 1 lookup 100
-	if [ $? -ne 0 ]; then
+	if ! ip -net "$listener_ns" $r6flag rule add fwmark 1 lookup 100; then
 		ip netns exec "$listener_ns" nft flush ruleset
-		echo "SKIP: $msg, ip $r6flag rule failed"
+		mptcp_lib_pr_skip "$msg, ip $r6flag rule failed"
 		mptcp_lib_fail_if_expected_feature "ip rule"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
 	fi
 
-	ip -net "$listener_ns" route add local $local_addr/0 dev lo table 100
-	if [ $? -ne 0 ]; then
+	if ! ip -net "$listener_ns" route add local $local_addr/0 dev lo table 100; then
 		ip netns exec "$listener_ns" nft flush ruleset
 		ip -net "$listener_ns" $r6flag rule del fwmark 1 lookup 100
-		echo "SKIP: $msg, ip route add local $local_addr failed"
+		mptcp_lib_pr_skip "$msg, ip route add local $local_addr failed"
 		mptcp_lib_fail_if_expected_feature "ip route"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
 	fi
 
-	echo "INFO: test $msg"
+	mptcp_lib_pr_info "test $msg"
 
-	TEST_COUNT=10000
+	port=$((20000 - 1))
 	local extra_args="-o TRANSPARENT"
 	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP \
 		    ${connect_addr} ${local_addr} "${extra_args}"
@@ -716,12 +729,12 @@ EOF
 	ip -net "$listener_ns" route del local $local_addr/0 dev lo table 100
 
 	if [ $lret -ne 0 ]; then
-		echo "FAIL: $msg, mptcp connection error" 1>&2
+		mptcp_lib_pr_fail "$msg, mptcp connection error"
 		ret=$lret
 		return 1
 	fi
 
-	echo "PASS: $msg"
+	mptcp_lib_pr_info "$msg pass"
 	return 0
 }
 
@@ -730,7 +743,7 @@ run_tests_peekmode()
 	local peekmode="$1"
 
 	TEST_GROUP="peek mode: ${peekmode}"
-	echo "INFO: with peek mode: ${peekmode}"
+	mptcp_lib_pr_info "with peek mode: ${peekmode}"
 	run_tests_lo "$ns1" "$ns1" 10.0.1.1 1 "-P ${peekmode}"
 	run_tests_lo "$ns1" "$ns1" dead:beef:1::1 1 "-P ${peekmode}"
 }
@@ -740,12 +753,12 @@ run_tests_mptfo()
 	TEST_GROUP="MPTFO"
 
 	if ! mptcp_lib_kallsyms_has "mptcp_fastopen_"; then
-		echo "INFO: TFO not supported by the kernel: SKIP"
+		mptcp_lib_pr_skip "TFO not supported by the kernel"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
 	fi
 
-	echo "INFO: with MPTFO start"
+	mptcp_lib_pr_info "with MPTFO start"
 	ip netns exec "$ns1" sysctl -q net.ipv4.tcp_fastopen=2
 	ip netns exec "$ns2" sysctl -q net.ipv4.tcp_fastopen=1
 
@@ -757,7 +770,7 @@ run_tests_mptfo()
 
 	ip netns exec "$ns1" sysctl -q net.ipv4.tcp_fastopen=0
 	ip netns exec "$ns2" sysctl -q net.ipv4.tcp_fastopen=0
-	echo "INFO: with MPTFO end"
+	mptcp_lib_pr_info "with MPTFO end"
 }
 
 run_tests_disconnect()
@@ -768,7 +781,7 @@ run_tests_disconnect()
 	TEST_GROUP="full disconnect"
 
 	if ! mptcp_lib_kallsyms_has "mptcp_pm_data_reset$"; then
-		echo "INFO: Full disconnect not supported: SKIP"
+		mptcp_lib_pr_skip "Full disconnect not supported"
 		mptcp_lib_result_skip "${TEST_GROUP}"
 		return
 	fi
@@ -781,7 +794,7 @@ run_tests_disconnect()
 	cin_disconnect="$old_cin"
 	connect_per_transfer=3
 
-	echo "INFO: disconnect"
+	mptcp_lib_pr_info "disconnect"
 	run_tests_lo "$ns1" "$ns1" 10.0.1.1 1 "-I 3 -i $old_cin"
 	run_tests_lo "$ns1" "$ns1" dead:beef:1::1 1 "-I 3 -i $old_cin"
 
@@ -805,10 +818,10 @@ log_if_error()
 	local msg="$1"
 
 	if [ ${ret} -ne 0 ]; then
-		echo "FAIL: ${msg}" 1>&2
+		mptcp_lib_pr_fail "${msg}"
 
 		final_ret=${ret}
-		ret=0
+		ret=${KSFT_PASS}
 
 		return ${final_ret}
 	fi
@@ -830,7 +843,7 @@ check_mptcp_disabled
 
 stop_if_error "The kernel configuration is not valid for MPTCP"
 
-echo "INFO: validating network environment with pings"
+print_larger_title "Validating network environment with pings"
 for sender in "$ns1" "$ns2" "$ns3" "$ns4";do
 	do_ping "$ns1" $sender 10.0.1.1
 	do_ping "$ns1" $sender dead:beef:1::1
@@ -852,12 +865,13 @@ done
 mptcp_lib_result_code "${ret}" "ping tests"
 
 stop_if_error "Could not even run ping tests"
+mptcp_lib_pr_ok
 
 [ -n "$tc_loss" ] && tc -net "$ns2" qdisc add dev ns2eth3 root netem loss random $tc_loss delay ${tc_delay}ms
-echo -n "INFO: Using loss of $tc_loss "
-test "$tc_delay" -gt 0 && echo -n "delay $tc_delay ms "
+tc_info="loss of $tc_loss "
+test "$tc_delay" -gt 0 && tc_info+="delay $tc_delay ms "
 
-reorder_delay=$(($tc_delay / 4))
+reorder_delay=$((tc_delay / 4))
 
 if [ -z "${tc_reorder}" ]; then
 	reorder1=$((RANDOM%10))
@@ -866,17 +880,17 @@ if [ -z "${tc_reorder}" ]; then
 
 	if [ $reorder_delay -gt 0 ] && [ $reorder1 -lt 100 ] && [ $reorder2 -gt 0 ]; then
 		tc_reorder="reorder ${reorder1}% ${reorder2}%"
-		echo -n "$tc_reorder with delay ${reorder_delay}ms "
+		tc_info+="$tc_reorder with delay ${reorder_delay}ms "
 	fi
 elif [ "$tc_reorder" = "0" ];then
 	tc_reorder=""
 elif [ "$reorder_delay" -gt 0 ];then
 	# reordering requires some delay
 	tc_reorder="reorder $tc_reorder"
-	echo -n "$tc_reorder with delay ${reorder_delay}ms "
+	tc_info+="$tc_reorder with delay ${reorder_delay}ms "
 fi
 
-echo "on ns3eth4"
+mptcp_lib_pr_info "Using ${tc_info}on ns3eth4"
 
 tc -net "$ns3" qdisc add dev ns3eth4 root netem delay ${reorder_delay}ms $tc_reorder